path: root/recipes-kernel/linux/linux-yocto-4.1/ccs-tools-yocto_security.patch

From d4a329ee417f1b75ba087828bb4b2f62c1ef57bb Mon Sep 17 00:00:00 2001
From: Auto Configured <auto.configured>
Date: Sun, 25 Oct 2015 12:19:45 -0700
Subject: [PATCH] Ci add ccsecuroty

Signed-off-by: Auto Configured <auto.configured>
---
 include/linux/ccsecurity.h           |  926 +++++
 include/linux/lsm2ccsecurity.h       |  181 +
 security/ccsecurity/Config.in        |   83 +
 security/ccsecurity/Kconfig          |  190 +
 security/ccsecurity/Makefile         |  122 +
 security/ccsecurity/gc.c             | 1036 ++++++
 security/ccsecurity/internal.h       | 2090 +++++++++++
 security/ccsecurity/load_policy.c    |  352 ++
 security/ccsecurity/lsm2ccsecurity.c |  192 +
 security/ccsecurity/memory.c         |  356 ++
 security/ccsecurity/permission.c     | 5025 ++++++++++++++++++++++++++
 security/ccsecurity/policy_io.c      | 6484 ++++++++++++++++++++++++++++++++++
 security/ccsecurity/realpath.c       |  767 ++++
 13 files changed, 17804 insertions(+)
 create mode 100644 include/linux/ccsecurity.h
 create mode 100644 include/linux/lsm2ccsecurity.h
 create mode 100644 security/ccsecurity/Config.in
 create mode 100644 security/ccsecurity/Kconfig
 create mode 100644 security/ccsecurity/Makefile
 create mode 100644 security/ccsecurity/gc.c
 create mode 100644 security/ccsecurity/internal.h
 create mode 100644 security/ccsecurity/load_policy.c
 create mode 100644 security/ccsecurity/lsm2ccsecurity.c
 create mode 100644 security/ccsecurity/memory.c
 create mode 100644 security/ccsecurity/permission.c
 create mode 100644 security/ccsecurity/policy_io.c
 create mode 100644 security/ccsecurity/realpath.c

diff --git a/include/linux/ccsecurity.h b/include/linux/ccsecurity.h
new file mode 100644
index 0000000..6c1ca2b
--- /dev/null
+++ b/include/linux/ccsecurity.h
@@ -0,0 +1,926 @@
+/*
+ * include/linux/ccsecurity.h
+ *
+ * Copyright (C) 2005-2012  NTT DATA CORPORATION
+ *
+ * Version: 1.8.4   2015/05/05
+ */
+
+#ifndef _LINUX_CCSECURITY_H
+#define _LINUX_CCSECURITY_H
+
+#include <linux/version.h>
+
+#ifndef __user
+#define __user
+#endif
+
+struct nameidata;
+struct path;
+struct dentry;
+struct vfsmount;
+struct linux_binprm;
+struct pt_regs;
+struct file;
+struct ctl_table;
+struct socket;
+struct sockaddr;
+struct sock;
+struct sk_buff;
+struct msghdr;
+struct pid_namespace;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 8, 0)
+int search_binary_handler(struct linux_binprm *bprm);
+#else
+int search_binary_handler(struct linux_binprm *bprm, struct pt_regs *regs);
+#endif
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 0, 0)
+#include <linux/lsm2ccsecurity.h>
+#endif
+
+#ifdef CONFIG_CCSECURITY
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 36) && LINUX_VERSION_CODE < KERNEL_VERSION(3, 2, 0)
+/* Obtain prototype of __d_path(). */
+#include <linux/dcache.h>
+#endif
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 5, 0)
+/* Obtain definition of kuid_t and kgid_t. */
+#include <linux/uidgid.h>
+#endif
+
+/* For exporting variables and functions. */
+struct ccsecurity_exports {
+	void (*load_policy) (const char *filename);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 2, 0) && defined(CONFIG_SECURITY)
+	void (*add_hooks) (void);
+#endif
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 2, 0)
+	char * (*d_absolute_path) (const struct path *, char *, int);
+#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 36)
+	typeof(__d_path) (*__d_path);
+#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 0)
+	spinlock_t *vfsmount_lock;
+#endif
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 24)
+	struct task_struct * (*find_task_by_vpid) (pid_t nr);
+	struct task_struct * (*find_task_by_pid_ns) (pid_t nr,
+						     struct pid_namespace *ns);
+#endif
+};
+
+/* For doing access control. */
+struct ccsecurity_operations {
+	void (*check_profile) (void);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25)
+	int (*chroot_permission) (struct path *path);
+	int (*pivot_root_permission) (struct path *old_path,
+				      struct path *new_path);
+	int (*mount_permission) (const char *dev_name, struct path *path,
+				 const char *type, unsigned long flags,
+				 void *data_page);
+#else
+	int (*chroot_permission) (struct nameidata *nd);
+	int (*pivot_root_permission) (struct nameidata *old_nd,
+				      struct nameidata *new_nd);
+	int (*mount_permission) (const char *dev_name, struct nameidata *nd,
+				 const char *type, unsigned long flags,
+				 void *data_page);
+#endif
+	int (*umount_permission) (struct vfsmount *mnt, int flags);
+	_Bool (*lport_reserved) (const u16 port);
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 32)
+	void (*save_open_mode) (int mode);
+	void (*clear_open_mode) (void);
+	int (*open_permission) (struct dentry *dentry, struct vfsmount *mnt,
+				const int flag);
+#else
+	int (*open_permission) (struct file *file);
+#endif
+	int (*ptrace_permission) (long request, long pid);
+	int (*ioctl_permission) (struct file *filp, unsigned int cmd,
+				 unsigned long arg);
+	int (*parse_table) (int __user *name, int nlen, void __user *oldval,
+			    void __user *newval, struct ctl_table *table);
+	_Bool (*capable) (const u8 operation);
+	int (*mknod_permission) (struct dentry *dentry, struct vfsmount *mnt,
+				 unsigned int mode, unsigned int dev);
+	int (*mkdir_permission) (struct dentry *dentry, struct vfsmount *mnt,
+				 unsigned int mode);
+	int (*rmdir_permission) (struct dentry *dentry, struct vfsmount *mnt);
+	int (*unlink_permission) (struct dentry *dentry, struct vfsmount *mnt);
+	int (*symlink_permission) (struct dentry *dentry, struct vfsmount *mnt,
+				   const char *from);
+	int (*truncate_permission) (struct dentry *dentry,
+				    struct vfsmount *mnt);
+	int (*rename_permission) (struct dentry *old_dentry,
+				  struct dentry *new_dentry,
+				  struct vfsmount *mnt);
+	int (*link_permission) (struct dentry *old_dentry,
+				struct dentry *new_dentry,
+				struct vfsmount *mnt);
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 30)
+	int (*open_exec_permission) (struct dentry *dentry,
+				     struct vfsmount *mnt);
+	int (*uselib_permission) (struct dentry *dentry, struct vfsmount *mnt);
+#endif
+	int (*fcntl_permission) (struct file *file, unsigned int cmd,
+				 unsigned long arg);
+	int (*kill_permission) (pid_t pid, int sig);
+	int (*tgkill_permission) (pid_t tgid, pid_t pid, int sig);
+	int (*tkill_permission) (pid_t pid, int sig);
+	int (*socket_create_permission) (int family, int type, int protocol);
+	int (*socket_listen_permission) (struct socket *sock);
+	int (*socket_connect_permission) (struct socket *sock,
+					  struct sockaddr *addr, int addr_len);
+	int (*socket_bind_permission) (struct socket *sock,
+				       struct sockaddr *addr, int addr_len);
+	int (*socket_post_accept_permission) (struct socket *sock,
+					      struct socket *newsock);
+	int (*socket_sendmsg_permission) (struct socket *sock,
+					  struct msghdr *msg, int size);
+	int (*socket_post_recvmsg_permission) (struct sock *sk,
+					       struct sk_buff *skb, int flags);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 5, 0)
+	int (*chown_permission) (struct dentry *dentry, struct vfsmount *mnt,
+				 kuid_t user, kgid_t group);
+#else
+	int (*chown_permission) (struct dentry *dentry, struct vfsmount *mnt,
+				 uid_t user, gid_t group);
+#endif
+	int (*chmod_permission) (struct dentry *dentry, struct vfsmount *mnt,
+				 mode_t mode);
+	int (*getattr_permission) (struct vfsmount *mnt,
+				   struct dentry *dentry);
+	int (*sigqueue_permission) (pid_t pid, int sig);
+	int (*tgsigqueue_permission) (pid_t tgid, pid_t pid, int sig);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 8, 0)
+	int (*search_binary_handler) (struct linux_binprm *bprm);
+#else
+	int (*search_binary_handler) (struct linux_binprm *bprm,
+				      struct pt_regs *regs);
+#endif
+#ifdef CONFIG_CCSECURITY_USE_EXTERNAL_TASK_SECURITY
+	int (*alloc_task_security) (const struct task_struct *task);
+	void (*free_task_security) (const struct task_struct *task);
+#endif
+	_Bool disabled;
+};
+
+extern struct ccsecurity_operations ccsecurity_ops;
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25)
+
+static inline int ccs_chroot_permission(struct path *path)
+{
+	int (*func) (struct path *) = ccsecurity_ops.chroot_permission;
+	return func ? func(path) : 0;
+}
+
+static inline int ccs_pivot_root_permission(struct path *old_path,
+					    struct path *new_path)
+{
+	int (*func) (struct path *, struct path *)
+		= ccsecurity_ops.pivot_root_permission;
+	return func ? func(old_path, new_path) : 0;
+}
+
+static inline int ccs_mount_permission(const char *dev_name, struct path *path,
+				       const char *type, unsigned long flags,
+				       void *data_page)
+{
+	int (*func) (const char *, struct path *, const char *, unsigned long,
+		     void *) = ccsecurity_ops.mount_permission;
+	return func ? func(dev_name, path, type, flags, data_page) : 0;
+}
+
+#else
+
+static inline int ccs_chroot_permission(struct nameidata *nd)
+{
+	int (*func) (struct nameidata *) = ccsecurity_ops.chroot_permission;
+	return func ? func(nd) : 0;
+}
+
+static inline int ccs_pivot_root_permission(struct nameidata *old_nd,
+					    struct nameidata *new_nd)
+{
+	int (*func) (struct nameidata *, struct nameidata *)
+		= ccsecurity_ops.pivot_root_permission;
+	return func ? func(old_nd, new_nd) : 0;
+}
+
+static inline int ccs_mount_permission(const char *dev_name,
+				       struct nameidata *nd, const char *type,
+				       unsigned long flags, void *data_page)
+{
+	int (*func) (const char *, struct nameidata *, const char *,
+		     unsigned long, void *) = ccsecurity_ops.mount_permission;
+	return func ? func(dev_name, nd, type, flags, data_page) : 0;
+}
+
+#endif
+
+static inline int ccs_umount_permission(struct vfsmount *mnt, int flags)
+{
+	int (*func) (struct vfsmount *, int)
+		= ccsecurity_ops.umount_permission;
+	return func ? func(mnt, flags) : 0;
+}
+
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 32)
+
+static inline void ccs_save_open_mode(int mode)
+{
+	void (*func) (int) = ccsecurity_ops.save_open_mode;
+	if (func)
+		func(mode);
+}
+
+static inline void ccs_clear_open_mode(void)
+{
+	void (*func) (void) = ccsecurity_ops.clear_open_mode;
+	if (func)
+		func();
+}
+
+static inline int ccs_open_permission(struct dentry *dentry,
+				      struct vfsmount *mnt, const int flag)
+{
+	int (*func) (struct dentry *, struct vfsmount *, const int)
+		= ccsecurity_ops.open_permission;
+	return func ? func(dentry, mnt, flag) : 0;
+}
+
+#else
+
+static inline int ccs_open_permission(struct file *filp)
+{
+	int (*func) (struct file *) = ccsecurity_ops.open_permission;
+	return func ? func(filp) : 0;
+}
+
+#endif
+
+static inline int ccs_fcntl_permission(struct file *file, unsigned int cmd,
+				       unsigned long arg)
+{
+	int (*func) (struct file *, unsigned int, unsigned long)
+		= ccsecurity_ops.fcntl_permission;
+	return func ? func(file, cmd, arg) : 0;
+}
+
+static inline int ccs_ioctl_permission(struct file *filp, unsigned int cmd,
+				       unsigned long arg)
+{
+	int (*func) (struct file *, unsigned int, unsigned long)
+		= ccsecurity_ops.ioctl_permission;
+	return func ? func(filp, cmd, arg) : 0;
+}
+
+static inline int ccs_parse_table(int __user *name, int nlen,
+				  void __user *oldval, void __user *newval,
+				  struct ctl_table *table)
+{
+	int (*func) (int __user *, int, void __user *, void __user *,
+		     struct ctl_table *) = ccsecurity_ops.parse_table;
+	return func ? func(name, nlen, oldval, newval, table) : 0;
+}
+
+static inline int ccs_mknod_permission(struct dentry *dentry,
+				       struct vfsmount *mnt, unsigned int mode,
+				       unsigned int dev)
+{
+	int (*func) (struct dentry *, struct vfsmount *, unsigned int,
+		     unsigned int) = ccsecurity_ops.mknod_permission;
+	return func ? func(dentry, mnt, mode, dev) : 0;
+}
+
+static inline int ccs_mkdir_permission(struct dentry *dentry,
+				       struct vfsmount *mnt, unsigned int mode)
+{
+	int (*func) (struct dentry *, struct vfsmount *, unsigned int)
+		= ccsecurity_ops.mkdir_permission;
+	return func ? func(dentry, mnt, mode) : 0;
+}
+
+static inline int ccs_rmdir_permission(struct dentry *dentry,
+				       struct vfsmount *mnt)
+{
+	int (*func) (struct dentry *, struct vfsmount *)
+		= ccsecurity_ops.rmdir_permission;
+	return func ? func(dentry, mnt) : 0;
+}
+
+static inline int ccs_unlink_permission(struct dentry *dentry,
+					struct vfsmount *mnt)
+{
+	int (*func) (struct dentry *, struct vfsmount *)
+		= ccsecurity_ops.unlink_permission;
+	return func ? func(dentry, mnt) : 0;
+}
+
+static inline int ccs_symlink_permission(struct dentry *dentry,
+					 struct vfsmount *mnt,
+					 const char *from)
+{
+	int (*func) (struct dentry *, struct vfsmount *, const char *)
+		= ccsecurity_ops.symlink_permission;
+	return func ? func(dentry, mnt, from) : 0;
+}
+
+static inline int ccs_truncate_permission(struct dentry *dentry,
+					  struct vfsmount *mnt)
+{
+	int (*func) (struct dentry *, struct vfsmount *)
+		= ccsecurity_ops.truncate_permission;
+	return func ? func(dentry, mnt) : 0;
+}
+
+static inline int ccs_rename_permission(struct dentry *old_dentry,
+					struct dentry *new_dentry,
+					struct vfsmount *mnt)
+{
+	int (*func) (struct dentry *, struct dentry *, struct vfsmount *)
+		= ccsecurity_ops.rename_permission;
+	return func ? func(old_dentry, new_dentry, mnt) : 0;
+}
+
+static inline int ccs_link_permission(struct dentry *old_dentry,
+				      struct dentry *new_dentry,
+				      struct vfsmount *mnt)
+{
+	int (*func) (struct dentry *, struct dentry *, struct vfsmount *)
+		= ccsecurity_ops.link_permission;
+	return func ? func(old_dentry, new_dentry, mnt) : 0;
+}
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 30)
+
+static inline int ccs_open_exec_permission(struct dentry *dentry,
+					   struct vfsmount *mnt)
+{
+	int (*func) (struct dentry *, struct vfsmount *)
+		= ccsecurity_ops.open_exec_permission;
+	return func ? func(dentry, mnt) : 0;
+}
+
+static inline int ccs_uselib_permission(struct dentry *dentry,
+					struct vfsmount *mnt)
+{
+	int (*func) (struct dentry *, struct vfsmount *)
+		= ccsecurity_ops.uselib_permission;
+	return func ? func(dentry, mnt) : 0;
+}
+
+#endif
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 5, 0)
+
+static inline int ccs_chown_permission(struct dentry *dentry,
+				       struct vfsmount *mnt, kuid_t user,
+				       kgid_t group)
+{
+	int (*func) (struct dentry *, struct vfsmount *, kuid_t, kgid_t)
+		= ccsecurity_ops.chown_permission;
+	return func ? func(dentry, mnt, user, group) : 0;
+}
+
+#else
+
+static inline int ccs_chown_permission(struct dentry *dentry,
+				       struct vfsmount *mnt, uid_t user,
+				       gid_t group)
+{
+	int (*func) (struct dentry *, struct vfsmount *, uid_t, gid_t)
+		= ccsecurity_ops.chown_permission;
+	return func ? func(dentry, mnt, user, group) : 0;
+}
+
+#endif
+
+static inline int ccs_chmod_permission(struct dentry *dentry,
+				       struct vfsmount *mnt, mode_t mode)
+{
+	int (*func) (struct dentry *, struct vfsmount *, mode_t)
+		= ccsecurity_ops.chmod_permission;
+	return func ? func(dentry, mnt, mode) : 0;
+}
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 8, 0)
+
+static inline int ccs_search_binary_handler(struct linux_binprm *bprm)
+{
+	return ccsecurity_ops.search_binary_handler(bprm);
+}
+
+#else
+
+static inline int ccs_search_binary_handler(struct linux_binprm *bprm,
+					    struct pt_regs *regs)
+{
+	return ccsecurity_ops.search_binary_handler(bprm, regs);
+}
+
+#endif
+
+#else
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25)
+
+static inline int ccs_chroot_permission(struct path *path)
+{
+	return 0;
+}
+
+static inline int ccs_pivot_root_permission(struct path *old_path,
+					    struct path *new_path)
+{
+	return 0;
+}
+
+static inline int ccs_mount_permission(const char *dev_name, struct path *path,
+				       const char *type, unsigned long flags,
+				       void *data_page)
+{
+	return 0;
+}
+
+#else
+
+static inline int ccs_chroot_permission(struct nameidata *nd)
+{
+	return 0;
+}
+
+static inline int ccs_pivot_root_permission(struct nameidata *old_nd,
+					    struct nameidata *new_nd)
+{
+	return 0;
+}
+
+static inline int ccs_mount_permission(const char *dev_name,
+				       struct nameidata *nd, const char *type,
+				       unsigned long flags, void *data_page)
+{
+	return 0;
+}
+
+#endif
+
+static inline int ccs_umount_permission(struct vfsmount *mnt, int flags)
+{
+	return 0;
+}
+
+static inline void ccs_save_open_mode(int mode)
+{
+}
+
+static inline void ccs_clear_open_mode(void)
+{
+}
+
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 32)
+
+static inline int ccs_open_permission(struct dentry *dentry,
+				      struct vfsmount *mnt, const int flag)
+{
+	return 0;
+}
+
+#else
+
+static inline int ccs_open_permission(struct file *filp)
+{
+	return 0;
+}
+
+#endif
+
+static inline int ccs_ioctl_permission(struct file *filp, unsigned int cmd,
+				       unsigned long arg)
+{
+	return 0;
+}
+
+static inline int ccs_parse_table(int __user *name, int nlen,
+				  void __user *oldval, void __user *newval,
+				  struct ctl_table *table)
+{
+	return 0;
+}
+
+static inline int ccs_mknod_permission(struct dentry *dentry,
+				       struct vfsmount *mnt, unsigned int mode,
+				       unsigned int dev)
+{
+	return 0;
+}
+
+static inline int ccs_mkdir_permission(struct dentry *dentry,
+				       struct vfsmount *mnt, unsigned int mode)
+{
+	return 0;
+}
+
+static inline int ccs_rmdir_permission(struct dentry *dentry,
+				       struct vfsmount *mnt)
+{
+	return 0;
+}
+
+static inline int ccs_unlink_permission(struct dentry *dentry,
+					struct vfsmount *mnt)
+{
+	return 0;
+}
+
+static inline int ccs_symlink_permission(struct dentry *dentry,
+					 struct vfsmount *mnt,
+					 const char *from)
+{
+	return 0;
+}
+
+static inline int ccs_truncate_permission(struct dentry *dentry,
+					  struct vfsmount *mnt)
+{
+	return 0;
+}
+
+static inline int ccs_rename_permission(struct dentry *old_dentry,
+					struct dentry *new_dentry,
+					struct vfsmount *mnt)
+{
+	return 0;
+}
+
+static inline int ccs_link_permission(struct dentry *old_dentry,
+				      struct dentry *new_dentry,
+				      struct vfsmount *mnt)
+{
+	return 0;
+}
+
+static inline int ccs_open_exec_permission(struct dentry *dentry,
+					   struct vfsmount *mnt)
+{
+	return 0;
+}
+
+static inline int ccs_uselib_permission(struct dentry *dentry,
+					struct vfsmount *mnt)
+{
+	return 0;
+}
+
+static inline int ccs_fcntl_permission(struct file *file, unsigned int cmd,
+				       unsigned long arg)
+{
+	return 0;
+}
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 5, 0)
+
+static inline int ccs_chown_permission(struct dentry *dentry,
+				       struct vfsmount *mnt, kuid_t user,
+				       kgid_t group)
+{
+	return 0;
+}
+
+#else
+
+static inline int ccs_chown_permission(struct dentry *dentry,
+				       struct vfsmount *mnt, uid_t user,
+				       gid_t group)
+{
+	return 0;
+}
+
+#endif
+
+static inline int ccs_chmod_permission(struct dentry *dentry,
+				       struct vfsmount *mnt, mode_t mode)
+{
+	return 0;
+}
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 8, 0)
+
+static inline int ccs_search_binary_handler(struct linux_binprm *bprm)
+{
+	return search_binary_handler(bprm);
+}
+
+#else
+
+static inline int ccs_search_binary_handler(struct linux_binprm *bprm,
+					    struct pt_regs *regs)
+{
+	return search_binary_handler(bprm, regs);
+}
+
+#endif
+
+#endif
+
+#ifdef CONFIG_CCSECURITY_USE_EXTERNAL_TASK_SECURITY
+
+static inline int ccs_alloc_task_security(const struct task_struct *task)
+{
+	int (*func) (const struct task_struct *)
+		= ccsecurity_ops.alloc_task_security;
+	return func ? func(task) : 0;
+}
+
+static inline void ccs_free_task_security(const struct task_struct *task)
+{
+	void (*func) (const struct task_struct *)
+		= ccsecurity_ops.free_task_security;
+	if (func)
+		func(task);
+}
+
+#else
+
+static inline int ccs_alloc_task_security(const struct task_struct *task)
+{
+	return 0;
+}
+
+static inline void ccs_free_task_security(const struct task_struct *task)
+{
+}
+
+#endif
+
+#ifdef CONFIG_CCSECURITY_FILE_GETATTR
+
+static inline int ccs_getattr_permission(struct vfsmount *mnt,
+					 struct dentry *dentry)
+{
+	int (*func) (struct vfsmount *, struct dentry *)
+		= ccsecurity_ops.getattr_permission;
+	return func ? func(mnt, dentry) : 0;
+}
+
+#else
+
+static inline int ccs_getattr_permission(struct vfsmount *mnt,
+					 struct dentry *dentry)
+{
+	return 0;
+}
+
+#endif
+
+#ifdef CONFIG_CCSECURITY_NETWORK
+
+static inline int ccs_socket_listen_permission(struct socket *sock)
+{
+	int (*func) (struct socket *)
+		= ccsecurity_ops.socket_listen_permission;
+	return func ? func(sock) : 0;
+}
+
+static inline int ccs_socket_connect_permission(struct socket *sock,
+						struct sockaddr *addr,
+						int addr_len)
+{
+	int (*func) (struct socket *, struct sockaddr *, int)
+		= ccsecurity_ops.socket_connect_permission;
+	return func ? func(sock, addr, addr_len) : 0;
+}
+
+static inline int ccs_socket_bind_permission(struct socket *sock,
+					     struct sockaddr *addr,
+					     int addr_len)
+{
+	int (*func) (struct socket *, struct sockaddr *, int)
+		= ccsecurity_ops.socket_bind_permission;
+	return func ? func(sock, addr, addr_len) : 0;
+}
+
+static inline int ccs_socket_post_accept_permission(struct socket *sock,
+						    struct socket *newsock)
+{
+	int (*func) (struct socket *, struct socket *)
+		= ccsecurity_ops.socket_post_accept_permission;
+	return func ? func(sock, newsock) : 0;
+}
+
+static inline int ccs_socket_sendmsg_permission(struct socket *sock,
+						struct msghdr *msg,
+						int size)
+{
+	int (*func) (struct socket *, struct msghdr *, int)
+		= ccsecurity_ops.socket_sendmsg_permission;
+	return func ? func(sock, msg, size) : 0;
+}
+
+#else
+
+static inline int ccs_socket_listen_permission(struct socket *sock)
+{
+	return 0;
+}
+
+static inline int ccs_socket_connect_permission(struct socket *sock,
+						struct sockaddr *addr,
+						int addr_len)
+{
+	return 0;
+}
+
+static inline int ccs_socket_bind_permission(struct socket *sock,
+					     struct sockaddr *addr,
+					     int addr_len)
+{
+	return 0;
+}
+
+static inline int ccs_socket_post_accept_permission(struct socket *sock,
+						    struct socket *newsock)
+{
+	return 0;
+}
+
+static inline int ccs_socket_sendmsg_permission(struct socket *sock,
+						struct msghdr *msg,
+						int size)
+{
+	return 0;
+}
+
+#endif
+
+#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG
+
+static inline int ccs_socket_post_recvmsg_permission(struct sock *sk,
+						     struct sk_buff *skb,
+						     int flags)
+{
+	int (*func) (struct sock *, struct sk_buff *, int)
+		= ccsecurity_ops.socket_post_recvmsg_permission;
+	return func ? func(sk, skb, flags) : 0;
+}
+
+#else
+
+static inline int ccs_socket_post_recvmsg_permission(struct sock *sk,
+						     struct sk_buff *skb,
+						     int flags)
+{
+	return 0;
+}
+
+#endif
+
+#ifdef CONFIG_CCSECURITY_PORTRESERVE
+
+static inline _Bool ccs_lport_reserved(const u16 port)
+{
+	_Bool (*func) (const u16) = ccsecurity_ops.lport_reserved;
+	return func ? func(port) : 0;
+}
+
+#else
+
+static inline _Bool ccs_lport_reserved(const u16 port)
+{
+	return 0;
+}
+
+#endif
+
+#ifdef CONFIG_CCSECURITY_CAPABILITY
+
+static inline _Bool ccs_capable(const u8 operation)
+{
+	_Bool (*func) (const u8) = ccsecurity_ops.capable;
+	return func ? func(operation) : 1;
+}
+
+static inline int ccs_socket_create_permission(int family, int type,
+					       int protocol)
+{
+	int (*func) (int, int, int) = ccsecurity_ops.socket_create_permission;
+	return func ? func(family, type, protocol) : 0;
+}
+
+static inline int ccs_ptrace_permission(long request, long pid)
+{
+	int (*func) (long, long) = ccsecurity_ops.ptrace_permission;
+	return func ? func(request, pid) : 0;
+}
+
+#else
+
+static inline _Bool ccs_capable(const u8 operation)
+{
+	return 1;
+}
+
+static inline int ccs_socket_create_permission(int family, int type,
+					       int protocol)
+{
+	return 0;
+}
+
+static inline int ccs_ptrace_permission(long request, long pid)
+{
+	return 0;
+}
+
+#endif
+
+#ifdef CONFIG_CCSECURITY_IPC
+
+static inline int ccs_kill_permission(pid_t pid, int sig)
+{
+	int (*func) (pid_t, int) = ccsecurity_ops.kill_permission;
+	return func ? func(pid, sig) : 0;
+}
+
+static inline int ccs_tgkill_permission(pid_t tgid, pid_t pid, int sig)
+{
+	int (*func) (pid_t, pid_t, int) = ccsecurity_ops.tgkill_permission;
+	return func ? func(tgid, pid, sig) : 0;
+}
+
+static inline int ccs_tkill_permission(pid_t pid, int sig)
+{
+	int (*func) (pid_t, int) = ccsecurity_ops.tkill_permission;
+	return func ? func(pid, sig) : 0;
+}
+
+static inline int ccs_sigqueue_permission(pid_t pid, int sig)
+{
+	int (*func) (pid_t, int) = ccsecurity_ops.sigqueue_permission;
+	return func ? func(pid, sig) : 0;
+}
+
+static inline int ccs_tgsigqueue_permission(pid_t tgid, pid_t pid, int sig)
+{
+	int (*func) (pid_t, pid_t, int) = ccsecurity_ops.tgsigqueue_permission;
+	return func ? func(tgid, pid, sig) : 0;
+}
+
+#else
+
+static inline int ccs_kill_permission(pid_t pid, int sig)
+{
+	return 0;
+}
+
+static inline int ccs_tgkill_permission(pid_t tgid, pid_t pid, int sig)
+{
+	return 0;
+}
+
+static inline int ccs_tkill_permission(pid_t pid, int sig)
+{
+	return 0;
+}
+
+static inline int ccs_sigqueue_permission(pid_t pid, int sig)
+{
+	return 0;
+}
+
+static inline int ccs_tgsigqueue_permission(pid_t tgid, pid_t pid, int sig)
+{
+	return 0;
+}
+
+#endif
+
+/* Index numbers for Capability Controls. */
+enum ccs_capability_acl_index {
+	/* socket(PF_ROUTE, *, *)                                      */
+	CCS_USE_ROUTE_SOCKET,
+	/* socket(PF_PACKET, *, *)                                     */
+	CCS_USE_PACKET_SOCKET,
+	/* sys_reboot()                                                */
+	CCS_SYS_REBOOT,
+	/* sys_vhangup()                                               */
+	CCS_SYS_VHANGUP,
+	/* do_settimeofday(), sys_adjtimex()                           */
+	CCS_SYS_SETTIME,
+	/* sys_nice(), sys_setpriority()                               */
+	CCS_SYS_NICE,
+	/* sys_sethostname(), sys_setdomainname()                      */
+	CCS_SYS_SETHOSTNAME,
+	/* sys_create_module(), sys_init_module(), sys_delete_module() */
+	CCS_USE_KERNEL_MODULE,
+	/* sys_kexec_load()                                            */
+	CCS_SYS_KEXEC_LOAD,
+	/* sys_ptrace()                                                */
+	CCS_SYS_PTRACE,
+	CCS_MAX_CAPABILITY_INDEX
+};
+
+#endif
diff --git a/include/linux/lsm2ccsecurity.h b/include/linux/lsm2ccsecurity.h
new file mode 100644
index 0000000..ab4ea5c
--- /dev/null
+++ b/include/linux/lsm2ccsecurity.h
@@ -0,0 +1,181 @@
+/*
+ * include/linux/lsm2ccsecurity.h
+ *
+ * Copyright (C) 2005-2012  NTT DATA CORPORATION
+ *
+ * Version: 1.8.4   2015/07/11
+ */
+
+#ifndef _LINUX_LSM2CCSECURITY_H
+#define _LINUX_LSM2CCSECURITY_H
+
+#include <linux/version.h>
+#include <linux/uidgid.h>
+
+#ifdef CONFIG_CCSECURITY
+
+int ccs_settime(const struct timespec *ts, const struct timezone *tz);
+int ccs_sb_mount(const char *dev_name, struct path *path, const char *type,
+		 unsigned long flags, void *data);
+int ccs_sb_umount(struct vfsmount *mnt, int flags);
+int ccs_sb_pivotroot(struct path *old_path, struct path *new_path);
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 1, 0)
+int ccs_inode_getattr(struct vfsmount *mnt, struct dentry *dentry);
+#else
+int ccs_inode_getattr(const struct path *path);
+#endif
+int ccs_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
+int ccs_file_fcntl(struct file *file, unsigned int cmd, unsigned long arg);
+int ccs_file_open(struct file *file, const struct cred *cred);
+int ccs_socket_create(int family, int type, int protocol, int kern);
+int ccs_socket_bind(struct socket *sock, struct sockaddr *address,
+		    int addrlen);
+int ccs_socket_connect(struct socket *sock, struct sockaddr *address,
+		       int addrlen);
+int ccs_socket_listen(struct socket *sock, int backlog);
+int ccs_socket_sendmsg(struct socket *sock, struct msghdr *msg, int size);
+int ccs_path_unlink(struct path *dir, struct dentry *dentry);
+int ccs_path_mkdir(struct path *dir, struct dentry *dentry, umode_t mode);
+int ccs_path_rmdir(struct path *dir, struct dentry *dentry);
+int ccs_path_mknod(struct path *dir, struct dentry *dentry, umode_t mode,
+		   unsigned int dev);
+int ccs_path_truncate(struct path *path);
+int ccs_path_symlink(struct path *dir, struct dentry *dentry,
+		     const char *old_name);
+int ccs_path_link(struct dentry *old_dentry, struct path *new_dir,
+		  struct dentry *new_dentry);
+int ccs_path_rename(struct path *old_dir, struct dentry *old_dentry,
+		    struct path *new_dir, struct dentry *new_dentry);
+int ccs_path_chmod(struct path *path, umode_t mode);
+int ccs_path_chown(struct path *path, kuid_t uid, kgid_t gid);
+int ccs_path_chroot(struct path *path);
+
+#else
+
+static inline int ccs_settime(const struct timespec *ts,
+			      const struct timezone *tz)
+{
+	return 0;
+}
+static inline int ccs_sb_mount(const char *dev_name, struct path *path,
+			       const char *type, unsigned long flags,
+			       void *data)
+{
+	return 0;
+}
+static inline int ccs_sb_umount(struct vfsmount *mnt, int flags)
+{
+	return 0;
+}
+static inline int ccs_sb_pivotroot(struct path *old_path,
+				   struct path *new_path)
+{
+	return 0;
+}
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 1, 0)
+static inline int ccs_inode_getattr(struct vfsmount *mnt,
+				    struct dentry *dentry)
+{
+	return 0;
+}
+#else
+static inline int ccs_inode_getattr(const struct path *path)
+{
+	return 0;
+}
+#endif
+static inline int ccs_file_ioctl(struct file *file, unsigned int cmd,
+				 unsigned long arg)
+{
+	return 0;
+}
+static inline int ccs_file_fcntl(struct file *file, unsigned int cmd,
+				 unsigned long arg)
+{
+	return 0;
+}
+static inline int ccs_file_open(struct file *file, const struct cred *cred)
+{
+	return 0;
+}
+static inline int ccs_socket_create(int family, int type, int protocol,
+				    int kern)
+{
+	return 0;
+}
+static inline int ccs_socket_bind(struct socket *sock,
+				  struct sockaddr *address, int addrlen)
+{
+	return 0;
+}
+static inline int ccs_socket_connect(struct socket *sock,
+				     struct sockaddr *address, int addrlen)
+{
+	return 0;
+}
+static inline int ccs_socket_listen(struct socket *sock, int backlog)
+{
+	return 0;
+}
+static inline int ccs_socket_sendmsg(struct socket *sock, struct msghdr *msg,
+				     int size)
+{
+	return 0;
+}
+static inline int ccs_path_unlink(struct path *dir, struct dentry *dentry)
+{
+	return 0;
+}
+static inline int ccs_path_mkdir(struct path *dir, struct dentry *dentry,
+				 umode_t mode)
+{
+	return 0;
+}
+static inline int ccs_path_rmdir(struct path *dir, struct dentry *dentry)
+{
+	return 0;
+}
+static inline int ccs_path_mknod(struct path *dir, struct dentry *dentry,
+				 umode_t mode, unsigned int dev)
+{
+	return 0;
+}
+static inline int ccs_path_truncate(struct path *path)
+{
+	return 0;
+}
+static inline int ccs_path_symlink(struct path *dir, struct dentry *dentry,
+				   const char *old_name)
+{
+	return 0;
+}
+static inline int ccs_path_link(struct dentry *old_dentry,
+				struct path *new_dir,
+				struct dentry *new_dentry)
+{
+	return 0;
+}
+static inline int ccs_path_rename(struct path *old_dir,
+				  struct dentry *old_dentry,
+				  struct path *new_dir,
+				  struct dentry *new_dentry)
+{
+	return 0;
+}
+static inline int ccs_path_chmod(struct path *path, umode_t mode)
+{
+	return 0;
+}
+static inline int ccs_path_chown(struct path *path, kuid_t uid, kgid_t gid)
+{
+	return 0;
+}
+static inline int ccs_path_chroot(struct path *path)
+{
+	return 0;
+}
+
+#endif /* defined(CONFIG_CCSECURITY) */
+
+#endif /* !defined(_LINUX_LSM2CCSECURITY_H) */
diff --git a/security/ccsecurity/Config.in b/security/ccsecurity/Config.in
new file mode 100644
index 0000000..da39bad6
--- /dev/null
+++ b/security/ccsecurity/Config.in
@@ -0,0 +1,83 @@
+#
+# Mandatory Access Control configuration
+#
+mainmenu_option next_comment
+comment 'Security options'
+
+[ -z "$CONFIG_CCSECURITY" ] && define_bool CONFIG_CCSECURITY y
+bool 'CCSecurity support' CONFIG_CCSECURITY
+
+if [ "$CONFIG_CCSECURITY" = "y" ]; then
+
+  [ -z "$CONFIG_CCSECURITY_LKM" ] && define_bool CONFIG_CCSECURITY_LKM n
+  bool 'Compile as loadable kernel module' CONFIG_CCSECURITY_LKM
+
+  [ -z "$CONFIG_CCSECURITY_DISABLE_BY_DEFAULT" ] && define_bool CONFIG_CCSECURITY_DISABLE_BY_DEFAULT n
+  bool 'Disable by default' CONFIG_CCSECURITY_DISABLE_BY_DEFAULT
+
+  [ -z "$CONFIG_CCSECURITY_MAX_ACCEPT_ENTRY" ] && define_int CONFIG_CCSECURITY_MAX_ACCEPT_ENTRY 2048
+  [ $CONFIG_CCSECURITY_MAX_ACCEPT_ENTRY -lt 0 ] && define_int CONFIG_CCSECURITY_MAX_ACCEPT_ENTRY 0
+  int  'Default maximal count for learning mode' CONFIG_CCSECURITY_MAX_ACCEPT_ENTRY
+
+  [ -z "$CONFIG_CCSECURITY_MAX_AUDIT_LOG" ] && define_int CONFIG_CCSECURITY_MAX_AUDIT_LOG 1024
+  [ $CONFIG_CCSECURITY_MAX_AUDIT_LOG -lt 0 ] && define_int CONFIG_CCSECURITY_MAX_AUDIT_LOG 0
+  int  'Default maximal count for audit log' CONFIG_CCSECURITY_MAX_AUDIT_LOG
+
+  [ -z "$CONFIG_CCSECURITY_OMIT_USERSPACE_LOADER" ] && define_bool CONFIG_CCSECURITY_OMIT_USERSPACE_LOADER n
+  bool 'Activate without calling userspace policy loader.' CONFIG_CCSECURITY_OMIT_USERSPACE_LOADER
+
+  if [ "$CONFIG_CCSECURITY_OMIT_USERSPACE_LOADER" = "n" ]; then
+
+    define_string CONFIG_CCSECURITY_POLICY_LOADER "/sbin/ccs-init"
+    string 'Location of userspace policy loader' CONFIG_CCSECURITY_POLICY_LOADER "/sbin/ccs-init"
+
+    define_string CONFIG_CCSECURITY_ACTIVATION_TRIGGER "/sbin/init"
+    string 'Trigger for calling userspace policy loader' CONFIG_CCSECURITY_ACTIVATION_TRIGGER "/sbin/init"
+
+  fi
+
+  [ -z "$CONFIG_CCSECURITY_FILE_READDIR" ] && define_bool CONFIG_CCSECURITY_FILE_READDIR y
+  bool "Enable readdir operation restriction." CONFIG_CCSECURITY_FILE_READDIR
+
+  [ -z "$CONFIG_CCSECURITY_FILE_GETATTR" ] && define_bool CONFIG_CCSECURITY_FILE_GETATTR y
+  bool "Enable getattr operation restriction." CONFIG_CCSECURITY_FILE_GETATTR
+
+  if [ "$CONFIG_NET" = "y" ]; then
+
+     [ -z "$CONFIG_CCSECURITY_NETWORK" ] && define_bool CONFIG_CCSECURITY_NETWORK y
+     bool "Enable socket operation restriction." CONFIG_CCSECURITY_NETWORK
+
+     if [ "$CONFIG_CCSECURITY_NETWORK" = "y" ]; then
+
+	#[ -z "$CONFIG_CCSECURITY_NETWORK_RECVMSG" ] &&
+	define_bool CONFIG_CCSECURITY_NETWORK_RECVMSG y
+
+     fi
+
+  fi
+
+  [ -z "$CONFIG_CCSECURITY_CAPABILITY" ] && define_bool CONFIG_CCSECURITY_CAPABILITY y
+  bool "Enable non-POSIX capability operation restriction." CONFIG_CCSECURITY_CAPABILITY
+
+  [ -z "$CONFIG_CCSECURITY_IPC" ] && define_bool CONFIG_CCSECURITY_IPC y
+  bool "Enable IPC operation restriction." CONFIG_CCSECURITY_IPC
+
+  [ -z "$CONFIG_CCSECURITY_MISC" ] && define_bool CONFIG_CCSECURITY_MISC y
+  bool "Enable environment variable names restriction." CONFIG_CCSECURITY_MISC
+
+  [ -z "$CONFIG_CCSECURITY_TASK_EXECUTE_HANDLER" ] && define_bool CONFIG_CCSECURITY_TASK_EXECUTE_HANDLER y
+  bool "Enable execute handler functionality." CONFIG_CCSECURITY_TASK_EXECUTE_HANDLER
+
+  [ -z "$CONFIG_CCSECURITY_TASK_DOMAIN_TRANSITION" ] && define_bool CONFIG_CCSECURITY_TASK_DOMAIN_TRANSITION y
+  bool "Enable domain transition without program execution request." CONFIG_CCSECURITY_TASK_DOMAIN_TRANSITION
+
+  if [ "$CONFIG_NET" = "y" ]; then
+
+     [ -z "$CONFIG_CCSECURITY_PORTRESERVE" ] && define_bool CONFIG_CCSECURITY_PORTRESERVE y
+     bool "Enable local port reserver." CONFIG_CCSECURITY_PORTRESERVE
+
+  fi
+
+fi
+
+endmenu
diff --git a/security/ccsecurity/Kconfig b/security/ccsecurity/Kconfig
new file mode 100644
index 0000000..8d7b200
--- /dev/null
+++ b/security/ccsecurity/Kconfig
@@ -0,0 +1,190 @@
+config CCSECURITY
+	bool "CCSecurity support"
+	default y
+	help
+	  Say Y here to support non-LSM version of TOMOYO Linux.
+	  http://tomoyo.osdn.jp/
+
+config CCSECURITY_LKM
+	bool "Compile as loadable kernel module"
+	default n
+	depends on CCSECURITY && MODULES
+	help
+	  This version of TOMOYO depends on patching the kernel source in order
+	  to insert some hooks which LSM does not provide. Therefore,
+	  recompiling the kernel is inevitable. But if you want to keep
+	  vmlinux's size as small as possible, you can compile most part of
+	  TOMOYO as a loadable kernel module by saying Y here.
+
+config CCSECURITY_DISABLE_BY_DEFAULT
+	bool "Disable by default"
+	default n
+	depends on CCSECURITY
+	help
+	  Say Y here if you want TOMOYO disabled by default.
+	  To enable TOMOYO, pass ccsecurity=on to kernel command line.
+	  To disable TOMOYO, pass ccsecurity=off to kernel command line.
+
+config CCSECURITY_USE_EXTERNAL_TASK_SECURITY
+	bool "Do not modify 'struct task_struct' in order to keep KABI"
+	default n
+	depends on CCSECURITY
+	help
+	  Say Y here if you want to keep KABI for prebuilt kernel modules
+	  unchanged. TOMOYO needs "struct ccs_domain_info *" and "u32" for each
+	  "struct task_struct". But embedding these variables into
+	  "struct task_struct" breaks KABI for prebuilt kernel modules (which
+	  means that you will need to rebuild prebuilt kernel modules).
+	  If you say Y here, these variables are managed outside
+	  "struct task_struct" rather than embedding into "struct task_struct",
+	  but accessing these variables becomes slower because lookup operation
+	  is performed every time the current thread needs to access them.
+
+config CCSECURITY_MAX_ACCEPT_ENTRY
+	int "Default maximal count for learning mode"
+	default 2048
+	range 0 2147483647
+	depends on CCSECURITY
+	help
+	  This is the default value for maximal ACL entries
+	  that are automatically appended into policy at "learning mode".
+	  Some programs access thousands of objects, so running
+	  such programs in "learning mode" dulls the system response
+	  and consumes much memory.
+	  This is the safeguard for such programs.
+
+config CCSECURITY_MAX_AUDIT_LOG
+	int "Default maximal count for audit log"
+	default 1024
+	range 0 2147483647
+	depends on CCSECURITY
+	help
+	  This is the default value for maximal entries for
+	  audit logs that the kernel can hold on memory.
+	  You can read the log via /proc/ccs/audit.
+	  If you don't need audit logs, you may set this value to 0.
+
+config CCSECURITY_OMIT_USERSPACE_LOADER
+	bool "Activate without calling userspace policy loader."
+	default n
+	depends on CCSECURITY
+	---help---
+	  Say Y here if you want to activate access control as soon as built-in
+	  policy was loaded. This option will be useful for systems where
+	  operations which can lead to the hijacking of the boot sequence are
+	  needed before loading the policy. For example, you can activate
+	  immediately after loading the fixed part of policy which will allow
+	  only operations needed for mounting a partition which contains the
+	  variant part of policy and verifying (e.g. running GPG check) and
+	  loading the variant part of policy. Since you can start using
+	  enforcing mode from the beginning, you can reduce the possibility of
+	  hijacking the boot sequence.
+
+	  If you say Y to both "Compile as loadable kernel module" option and
+	  "Activate without calling userspace policy loader." option, be sure
+	  to excplicitly load the kernel module from the userspace, for
+	  the kernel will not call /sbin/ccs-init when /sbin/init starts.
+
+config CCSECURITY_POLICY_LOADER
+	string "Location of userspace policy loader"
+	default "/sbin/ccs-init"
+	depends on CCSECURITY
+	depends on !CCSECURITY_OMIT_USERSPACE_LOADER
+	---help---
+	  This is the default pathname of policy loader which is called before
+	  activation. You can override this setting via CCS_loader= kernel
+	  command line option.
+
+config CCSECURITY_ACTIVATION_TRIGGER
+	string "Trigger for calling userspace policy loader"
+	default "/sbin/init"
+	depends on CCSECURITY
+	depends on !CCSECURITY_OMIT_USERSPACE_LOADER
+	---help---
+	  This is the default pathname of activation trigger.
+	  You can override this setting via CCS_trigger= kernel command line
+	  option. For example, if you pass init=/bin/systemd option, you may
+	  want to also pass CCS_trigger=/bin/systemd option.
+
+	  Say Y here if you want to enable only specific functionality in order
+	  to reduce object file size.
+
+config CCSECURITY_FILE_READDIR
+	bool "Enable readdir operation restriction."
+	default y
+	depends on CCSECURITY
+	---help---
+	  Say Y here if you want to enable analysis/restriction of opening
+	  directories for reading. Reading directory entries is a commonly
+	  requested operation and damage caused by not restricting it as MAC
+	  might be acceptable for you.
+
+config CCSECURITY_FILE_GETATTR
+	bool "Enable getattr operation restriction."
+	default y
+	depends on CCSECURITY
+	---help---
+	  Say Y here if you want to enable analysis/restriction of getting
+	  information of files. Getting file's information is a commonly
+	  requested operation and damage caused by not restricting it as MAC
+	  might be acceptable for you.
+
+config CCSECURITY_NETWORK
+	bool "Enable socket operation restriction."
+	default y
+	depends on NET
+	depends on CCSECURITY
+	---help---
+	  Say Y here if you want to enable analysis/restriction of INET and
+	  UNIX domain socket's operations.
+
+config CCSECURITY_CAPABILITY
+	bool "Enable non-POSIX capability operation restriction."
+	default y
+	depends on CCSECURITY
+	---help---
+	  Say Y here if you want to enable analysis/restriction of non-POSIX
+	  capabilities.
+
+config CCSECURITY_IPC
+	bool "Enable IPC operation restriction."
+	default y
+	depends on CCSECURITY
+	---help---
+	  Say Y here if you want to enable analysis/restriction of sending
+	  signals.
+
+config CCSECURITY_MISC
+	bool "Enable environment variable names restriction."
+	default y
+	depends on CCSECURITY
+	---help---
+	  Say Y here if you want to enable analysis/restriction of environment
+	  variable names passed upon program execution request.
+
+config CCSECURITY_TASK_EXECUTE_HANDLER
+	bool "Enable execute handler functionality."
+	default y
+	depends on CCSECURITY
+	---help---
+	  Say Y here if you want to enable execute handler functionality.
+
+config CCSECURITY_TASK_DOMAIN_TRANSITION
+	bool "Enable domain transition without program execution request."
+	default y
+	depends on CCSECURITY
+	---help---
+	  Say Y here if you want to enable domain transition without involving
+	  program execution request.
+
+config CCSECURITY_PORTRESERVE
+       bool "Enable local port reserver."
+       default y
+       depends on NET
+       depends on CCSECURITY
+       ---help---
+	 Say Y here if you want to implement
+	 /proc/sys/net/ipv4/ip_local_reserved_ports as a MAC policy.
+
+config CCSECURITY_NETWORK_RECVMSG
+	def_bool CCSECURITY_NETWORK
diff --git a/security/ccsecurity/Makefile b/security/ccsecurity/Makefile
new file mode 100644
index 0000000..79c3632
--- /dev/null
+++ b/security/ccsecurity/Makefile
@@ -0,0 +1,122 @@
+ccsecurity-objs := permission.o gc.o memory.o policy_io.o realpath.o
+
+ifeq ($(VERSION)$(PATCHLEVEL),24)
+
+ifdef CONFIG_CCSECURITY
+O_TARGET := ccsecurity.o
+ifdef CONFIG_CCSECURITY_LKM
+all_targets: load_policy.o
+obj-m := ccsecurity.o
+obj-y := $(ccsecurity-objs)
+else
+all_targets: ccsecurity.o
+obj-y := load_policy.o $(ccsecurity-objs)
+endif
+export-objs := load_policy.o
+endif
+include $(TOPDIR)/Rules.make
+
+policy/profile.conf:
+	@mkdir -p policy/
+	@echo Creating an empty policy/profile.conf
+	@touch $@
+
+policy/exception_policy.conf:
+	@mkdir -p policy/
+	@echo Creating a default policy/exception_policy.conf
+	@echo initialize_domain /sbin/modprobe from any >> $@
+	@echo initialize_domain /sbin/hotplug from any >> $@
+
+policy/domain_policy.conf:
+	@mkdir -p policy/
+	@echo Creating an empty policy/domain_policy.conf
+	@touch $@
+
+policy/manager.conf:
+	@mkdir -p policy/
+	@echo Creating an empty policy/manager.conf
+	@touch $@
+
+policy/stat.conf:
+	@mkdir -p policy/
+	@echo Creating an empty policy/stat.conf
+	@touch $@
+
+builtin-policy.h: policy/profile.conf policy/exception_policy.conf policy/domain_policy.conf policy/manager.conf policy/stat.conf
+	@echo Generating built-in policy for TOMOYO 1.8.x.
+	@echo "static char ccs_builtin_profile[] __initdata =" > $@.tmp
+	@sed -e 's/\\/\\\\/g' -e 's/\"/\\"/g' -e 's/\(.*\)/"\1\\n"/' < policy/profile.conf >> $@.tmp
+	@echo "\"\";" >> $@.tmp
+	@echo "static char ccs_builtin_exception_policy[] __initdata =" >> $@.tmp
+	@sed -e 's/\\/\\\\/g' -e 's/\"/\\"/g' -e 's/\(.*\)/"\1\\n"/' < policy/exception_policy.conf >> $@.tmp
+	@echo "\"\";" >> $@.tmp
+	@echo "static char ccs_builtin_domain_policy[] __initdata =" >> $@.tmp
+	@sed -e 's/\\/\\\\/g' -e 's/\"/\\"/g' -e 's/\(.*\)/"\1\\n"/' < policy/domain_policy.conf >> $@.tmp
+	@echo "\"\";" >> $@.tmp
+	@echo "static char ccs_builtin_manager[] __initdata =" >> $@.tmp
+	@sed -e 's/\\/\\\\/g' -e 's/\"/\\"/g' -e 's/\(.*\)/"\1\\n"/' < policy/manager.conf >> $@.tmp
+	@echo "\"\";" >> $@.tmp
+	@echo "static char ccs_builtin_stat[] __initdata =" >> $@.tmp
+	@sed -e 's/\\/\\\\/g' -e 's/\"/\\"/g' -e 's/\(.*\)/"\1\\n"/' < policy/stat.conf >> $@.tmp
+	@echo "\"\";" >> $@.tmp
+	@mv $@.tmp $@
+
+policy_io.o: builtin-policy.h
+
+else
+
+obj-y += load_policy.o
+ifdef CONFIG_CCSECURITY_LKM
+obj-m += ccsecurity.o
+else
+obj-y += ccsecurity.o
+endif
+
+$(obj)/policy/profile.conf:
+	@mkdir -p $(obj)/policy/
+	@echo Creating an empty policy/profile.conf
+	@touch $@
+
+$(obj)/policy/exception_policy.conf:
+	@mkdir -p $(obj)/policy/
+	@echo Creating a default policy/exception_policy.conf
+	@echo initialize_domain /sbin/modprobe from any >> $@
+	@echo initialize_domain /sbin/hotplug from any >> $@
+
+$(obj)/policy/domain_policy.conf:
+	@mkdir -p $(obj)/policy/
+	@echo Creating an empty policy/domain_policy.conf
+	@touch $@
+
+$(obj)/policy/manager.conf:
+	@mkdir -p $(obj)/policy/
+	@echo Creating an empty policy/manager.conf
+	@touch $@
+
+$(obj)/policy/stat.conf:
+	@mkdir -p $(obj)/policy/
+	@echo Creating an empty policy/stat.conf
+	@touch $@
+
+$(obj)/builtin-policy.h: $(obj)/policy/profile.conf $(obj)/policy/exception_policy.conf $(obj)/policy/domain_policy.conf $(obj)/policy/manager.conf $(obj)/policy/stat.conf
+	@echo Generating built-in policy for TOMOYO 1.8.x.
+	@echo "static char ccs_builtin_profile[] __initdata =" > $@.tmp
+	@sed -e 's/\\/\\\\/g' -e 's/\"/\\"/g' -e 's/\(.*\)/"\1\\n"/' < $(obj)/policy/profile.conf >> $@.tmp
+	@echo "\"\";" >> $@.tmp
+	@echo "static char ccs_builtin_exception_policy[] __initdata =" >> $@.tmp
+	@sed -e 's/\\/\\\\/g' -e 's/\"/\\"/g' -e 's/\(.*\)/"\1\\n"/' < $(obj)/policy/exception_policy.conf >> $@.tmp
+	@echo "\"\";" >> $@.tmp
+	@echo "static char ccs_builtin_domain_policy[] __initdata =" >> $@.tmp
+	@sed -e 's/\\/\\\\/g' -e 's/\"/\\"/g' -e 's/\(.*\)/"\1\\n"/' < $(obj)/policy/domain_policy.conf >> $@.tmp
+	@echo "\"\";" >> $@.tmp
+	@echo "static char ccs_builtin_manager[] __initdata =" >> $@.tmp
+	@sed -e 's/\\/\\\\/g' -e 's/\"/\\"/g' -e 's/\(.*\)/"\1\\n"/' < $(obj)/policy/manager.conf >> $@.tmp
+	@echo "\"\";" >> $@.tmp
+	@echo "static char ccs_builtin_stat[] __initdata =" >> $@.tmp
+	@sed -e 's/\\/\\\\/g' -e 's/\"/\\"/g' -e 's/\(.*\)/"\1\\n"/' < $(obj)/policy/stat.conf >> $@.tmp
+	@echo "\"\";" >> $@.tmp
+	@mv $@.tmp $@
+
+$(obj)/policy_io.o: $(obj)/builtin-policy.h
+
+endif
diff --git a/security/ccsecurity/gc.c b/security/ccsecurity/gc.c
new file mode 100644
index 0000000..0a578ab
--- /dev/null
+++ b/security/ccsecurity/gc.c
@@ -0,0 +1,1036 @@
+/*
+ * security/ccsecurity/gc.c
+ *
+ * Copyright (C) 2005-2012  NTT DATA CORPORATION
+ *
+ * Version: 1.8.4   2015/05/05
+ */
+
+#include "internal.h"
+
+/***** SECTION1: Constants definition *****/
+
+/* For compatibility with older kernels. */
+#ifndef for_each_process
+#define for_each_process for_each_task
+#endif
+
+/* The list for "struct ccs_io_buffer". */
+static LIST_HEAD(ccs_io_buffer_list);
+/* Lock for protecting ccs_io_buffer_list. */
+static DEFINE_SPINLOCK(ccs_io_buffer_list_lock);
+
+/***** SECTION2: Structure definition *****/
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19)
+
+/*
+ * Lock for syscall users.
+ *
+ * This lock is used for protecting single SRCU section for 2.6.18 and
+ * earlier kernels because they don't have SRCU support.
+ */
+struct ccs_lock_struct {
+	int counter_idx; /* Currently active index (0 or 1). */
+	int counter[2];  /* Current users. Protected by ccs_counter_lock. */
+};
+
+#endif
+
+/***** SECTION3: Prototype definition section *****/
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19)
+int ccs_lock(void);
+#endif
+void ccs_del_acl(struct list_head *element);
+void ccs_del_condition(struct list_head *element);
+void ccs_notify_gc(struct ccs_io_buffer *head, const bool is_register);
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19)
+void ccs_unlock(const int idx);
+#endif
+
+static bool ccs_domain_used_by_task(struct ccs_domain_info *domain);
+static bool ccs_name_used_by_io_buffer(const char *string, const size_t size);
+static bool ccs_struct_used_by_io_buffer(const struct list_head *element);
+static int ccs_gc_thread(void *unused);
+static void ccs_collect_acl(struct list_head *list);
+static void ccs_collect_entry(void);
+static void ccs_collect_member(const enum ccs_policy_id id,
+			       struct list_head *member_list);
+static void ccs_memory_free(const void *ptr, const enum ccs_policy_id type);
+static void ccs_put_name_union(struct ccs_name_union *ptr);
+static void ccs_put_number_union(struct ccs_number_union *ptr);
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19)
+static void ccs_synchronize_counter(void);
+#endif
+static void ccs_try_to_gc(const enum ccs_policy_id type,
+			  struct list_head *element);
+
+/***** SECTION4: Standalone functions section *****/
+
+/***** SECTION5: Variables definition section *****/
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 19)
+
+/*
+ * Lock for syscall users.
+ *
+ * This lock is held for only protecting single SRCU section.
+ */
+struct srcu_struct ccs_ss;
+
+#else
+
+static struct ccs_lock_struct ccs_counter;
+/* Lock for protecting ccs_counter. */
+static DEFINE_SPINLOCK(ccs_counter_lock);
+
+#endif
+
+/***** SECTION6: Dependent functions section *****/
+
+/**
+ * ccs_memory_free - Free memory for elements.
+ *
+ * @ptr:  Pointer to allocated memory.
+ * @type: One of values in "enum ccs_policy_id".
+ *
+ * Returns nothing.
+ *
+ * Caller holds ccs_policy_lock mutex.
+ */
+static void ccs_memory_free(const void *ptr, const enum ccs_policy_id type)
+{
+	/* Size of an element. */
+	static const u8 e[CCS_MAX_POLICY] = {
+#ifdef CONFIG_CCSECURITY_PORTRESERVE
+		[CCS_ID_RESERVEDPORT] = sizeof(struct ccs_reserved),
+#endif
+		[CCS_ID_GROUP] = sizeof(struct ccs_group),
+#ifdef CONFIG_CCSECURITY_NETWORK
+		[CCS_ID_ADDRESS_GROUP] = sizeof(struct ccs_address_group),
+#endif
+		[CCS_ID_PATH_GROUP] = sizeof(struct ccs_path_group),
+		[CCS_ID_NUMBER_GROUP] = sizeof(struct ccs_number_group),
+		[CCS_ID_AGGREGATOR] = sizeof(struct ccs_aggregator),
+		[CCS_ID_TRANSITION_CONTROL]
+		= sizeof(struct ccs_transition_control),
+		[CCS_ID_MANAGER] = sizeof(struct ccs_manager),
+		/* [CCS_ID_CONDITION] = "struct ccs_condition"->size, */
+		/* [CCS_ID_NAME] = "struct ccs_name"->size, */
+		/* [CCS_ID_ACL] = a["struct ccs_acl_info"->type], */
+		[CCS_ID_DOMAIN] = sizeof(struct ccs_domain_info),
+	};
+	/* Size of a domain ACL element. */
+	static const u8 a[] = {
+		[CCS_TYPE_PATH_ACL] = sizeof(struct ccs_path_acl),
+		[CCS_TYPE_PATH2_ACL] = sizeof(struct ccs_path2_acl),
+		[CCS_TYPE_PATH_NUMBER_ACL]
+		= sizeof(struct ccs_path_number_acl),
+		[CCS_TYPE_MKDEV_ACL] = sizeof(struct ccs_mkdev_acl),
+		[CCS_TYPE_MOUNT_ACL] = sizeof(struct ccs_mount_acl),
+#ifdef CONFIG_CCSECURITY_NETWORK
+		[CCS_TYPE_INET_ACL] = sizeof(struct ccs_inet_acl),
+		[CCS_TYPE_UNIX_ACL] = sizeof(struct ccs_unix_acl),
+#endif
+#ifdef CONFIG_CCSECURITY_MISC
+		[CCS_TYPE_ENV_ACL] = sizeof(struct ccs_env_acl),
+#endif
+#ifdef CONFIG_CCSECURITY_CAPABILITY
+		[CCS_TYPE_CAPABILITY_ACL] = sizeof(struct ccs_capability_acl),
+#endif
+#ifdef CONFIG_CCSECURITY_IPC
+		[CCS_TYPE_SIGNAL_ACL] = sizeof(struct ccs_signal_acl),
+#endif
+#ifdef CONFIG_CCSECURITY_TASK_EXECUTE_HANDLER
+		[CCS_TYPE_AUTO_EXECUTE_HANDLER]
+		= sizeof(struct ccs_handler_acl),
+		[CCS_TYPE_DENIED_EXECUTE_HANDLER]
+		= sizeof(struct ccs_handler_acl),
+#endif
+#ifdef CONFIG_CCSECURITY_TASK_DOMAIN_TRANSITION
+		[CCS_TYPE_AUTO_TASK_ACL] = sizeof(struct ccs_task_acl),
+		[CCS_TYPE_MANUAL_TASK_ACL] = sizeof(struct ccs_task_acl),
+#endif
+	};
+	size_t size;
+	if (type == CCS_ID_ACL)
+		size = a[container_of(ptr, typeof(struct ccs_acl_info),
+				      list)->type];
+	else if (type == CCS_ID_NAME)
+		size = container_of(ptr, typeof(struct ccs_name),
+				    head.list)->size;
+	else if (type == CCS_ID_CONDITION)
+		size = container_of(ptr, typeof(struct ccs_condition),
+				    head.list)->size;
+	else
+		size = e[type];
+	ccs_memory_used[CCS_MEMORY_POLICY] -= ccs_round2(size);
+	kfree(ptr);
+}
+
+/**
+ * ccs_put_name_union - Drop reference on "struct ccs_name_union".
+ *
+ * @ptr: Pointer to "struct ccs_name_union".
+ *
+ * Returns nothing.
+ */
+static void ccs_put_name_union(struct ccs_name_union *ptr)
+{
+	ccs_put_group(ptr->group);
+	ccs_put_name(ptr->filename);
+}
+
+/**
+ * ccs_put_number_union - Drop reference on "struct ccs_number_union".
+ *
+ * @ptr: Pointer to "struct ccs_number_union".
+ *
+ * Returns nothing.
+ */
+static void ccs_put_number_union(struct ccs_number_union *ptr)
+{
+	ccs_put_group(ptr->group);
+}
+
+/**
+ * ccs_struct_used_by_io_buffer - Check whether the list element is used by /proc/ccs/ users or not.
+ *
+ * @element: Pointer to "struct list_head".
+ *
+ * Returns true if @element is used by /proc/ccs/ users, false otherwise.
+ */
+static bool ccs_struct_used_by_io_buffer(const struct list_head *element)
+{
+	struct ccs_io_buffer *head;
+	bool in_use = false;
+	spin_lock(&ccs_io_buffer_list_lock);
+	list_for_each_entry(head, &ccs_io_buffer_list, list) {
+		head->users++;
+		spin_unlock(&ccs_io_buffer_list_lock);
+		mutex_lock(&head->io_sem);
+		if (head->r.domain == element || head->r.group == element ||
+		    head->r.acl == element || &head->w.domain->list == element)
+			in_use = true;
+		mutex_unlock(&head->io_sem);
+		spin_lock(&ccs_io_buffer_list_lock);
+		head->users--;
+		if (in_use)
+			break;
+	}
+	spin_unlock(&ccs_io_buffer_list_lock);
+	return in_use;
+}
+
+/**
+ * ccs_name_used_by_io_buffer - Check whether the string is used by /proc/ccs/ users or not.
+ *
+ * @string: String to check.
+ * @size:   Memory allocated for @string .
+ *
+ * Returns true if @string is used by /proc/ccs/ users, false otherwise.
+ */
+static bool ccs_name_used_by_io_buffer(const char *string, const size_t size)
+{
+	struct ccs_io_buffer *head;
+	bool in_use = false;
+	spin_lock(&ccs_io_buffer_list_lock);
+	list_for_each_entry(head, &ccs_io_buffer_list, list) {
+		int i;
+		head->users++;
+		spin_unlock(&ccs_io_buffer_list_lock);
+		mutex_lock(&head->io_sem);
+		for (i = 0; i < CCS_MAX_IO_READ_QUEUE; i++) {
+			const char *w = head->r.w[i];
+			if (w < string || w > string + size)
+				continue;
+			in_use = true;
+			break;
+		}
+		mutex_unlock(&head->io_sem);
+		spin_lock(&ccs_io_buffer_list_lock);
+		head->users--;
+		if (in_use)
+			break;
+	}
+	spin_unlock(&ccs_io_buffer_list_lock);
+	return in_use;
+}
+
+/**
+ * ccs_del_transition_control - Delete members in "struct ccs_transition_control".
+ *
+ * @element: Pointer to "struct list_head".
+ *
+ * Returns nothing.
+ */
+static inline void ccs_del_transition_control(struct list_head *element)
+{
+	struct ccs_transition_control *ptr =
+		container_of(element, typeof(*ptr), head.list);
+	ccs_put_name(ptr->domainname);
+	ccs_put_name(ptr->program);
+}
+
+/**
+ * ccs_del_aggregator - Delete members in "struct ccs_aggregator".
+ *
+ * @element: Pointer to "struct list_head".
+ *
+ * Returns nothing.
+ */
+static inline void ccs_del_aggregator(struct list_head *element)
+{
+	struct ccs_aggregator *ptr =
+		container_of(element, typeof(*ptr), head.list);
+	ccs_put_name(ptr->original_name);
+	ccs_put_name(ptr->aggregated_name);
+}
+
+/**
+ * ccs_del_manager - Delete members in "struct ccs_manager".
+ *
+ * @element: Pointer to "struct list_head".
+ *
+ * Returns nothing.
+ */
+static inline void ccs_del_manager(struct list_head *element)
+{
+	struct ccs_manager *ptr =
+		container_of(element, typeof(*ptr), head.list);
+	ccs_put_name(ptr->manager);
+}
+
+/**
+ * ccs_domain_used_by_task - Check whether the given pointer is referenced by a task.
+ *
+ * @domain: Pointer to "struct ccs_domain_info".
+ *
+ * Returns true if @domain is in use, false otherwise.
+ */
+static bool ccs_domain_used_by_task(struct ccs_domain_info *domain)
+{
+	bool in_use = false;
+	/*
+	 * Don't delete this domain if somebody is doing execve().
+	 *
+	 * Since ccs_finish_execve() first reverts ccs_domain_info and then
+	 * updates ccs_flags, we need smp_rmb() to make sure that GC first
+	 * checks ccs_flags and then checks ccs_domain_info.
+	 */
+#ifdef CONFIG_CCSECURITY_USE_EXTERNAL_TASK_SECURITY
+	int idx;
+	rcu_read_lock();
+	for (idx = 0; idx < CCS_MAX_TASK_SECURITY_HASH; idx++) {
+		struct ccs_security *ptr;
+		struct list_head *list = &ccs_task_security_list[idx];
+		list_for_each_entry_rcu(ptr, list, list) {
+			if (!(ptr->ccs_flags & CCS_TASK_IS_IN_EXECVE)) {
+				smp_rmb(); /* Avoid out of order execution. */
+				if (ptr->ccs_domain_info != domain)
+					continue;
+			}
+			in_use = true;
+			goto out;
+		}
+	}
+out:
+	rcu_read_unlock();
+#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0)
+	struct task_struct *g;
+	struct task_struct *t;
+	ccs_tasklist_lock();
+	do_each_thread(g, t) {
+		if (!(t->ccs_flags & CCS_TASK_IS_IN_EXECVE)) {
+			smp_rmb(); /* Avoid out of order execution. */
+			if (t->ccs_domain_info != domain)
+				continue;
+		}
+		in_use = true;
+		goto out;
+	} while_each_thread(g, t);
+out:
+	ccs_tasklist_unlock();
+#else
+	struct task_struct *p;
+	ccs_tasklist_lock();
+	for_each_process(p) {
+		if (!(p->ccs_flags & CCS_TASK_IS_IN_EXECVE)) {
+			smp_rmb(); /* Avoid out of order execution. */
+			if (p->ccs_domain_info != domain)
+				continue;
+		}
+		in_use = true;
+		break;
+	}
+	ccs_tasklist_unlock();
+#endif
+	return in_use;
+}
+
+/**
+ * ccs_del_acl - Delete members in "struct ccs_acl_info".
+ *
+ * @element: Pointer to "struct list_head".
+ *
+ * Returns nothing.
+ */
+void ccs_del_acl(struct list_head *element)
+{
+	struct ccs_acl_info *acl = container_of(element, typeof(*acl), list);
+	ccs_put_condition(acl->cond);
+	switch (acl->type) {
+	case CCS_TYPE_PATH_ACL:
+		{
+			struct ccs_path_acl *entry =
+				container_of(acl, typeof(*entry), head);
+			ccs_put_name_union(&entry->name);
+		}
+		break;
+	case CCS_TYPE_PATH2_ACL:
+		{
+			struct ccs_path2_acl *entry =
+				container_of(acl, typeof(*entry), head);
+			ccs_put_name_union(&entry->name1);
+			ccs_put_name_union(&entry->name2);
+		}
+		break;
+	case CCS_TYPE_PATH_NUMBER_ACL:
+		{
+			struct ccs_path_number_acl *entry =
+				container_of(acl, typeof(*entry), head);
+			ccs_put_name_union(&entry->name);
+			ccs_put_number_union(&entry->number);
+		}
+		break;
+	case CCS_TYPE_MKDEV_ACL:
+		{
+			struct ccs_mkdev_acl *entry =
+				container_of(acl, typeof(*entry), head);
+			ccs_put_name_union(&entry->name);
+			ccs_put_number_union(&entry->mode);
+			ccs_put_number_union(&entry->major);
+			ccs_put_number_union(&entry->minor);
+		}
+		break;
+	case CCS_TYPE_MOUNT_ACL:
+		{
+			struct ccs_mount_acl *entry =
+				container_of(acl, typeof(*entry), head);
+			ccs_put_name_union(&entry->dev_name);
+			ccs_put_name_union(&entry->dir_name);
+			ccs_put_name_union(&entry->fs_type);
+			ccs_put_number_union(&entry->flags);
+		}
+		break;
+#ifdef CONFIG_CCSECURITY_NETWORK
+	case CCS_TYPE_INET_ACL:
+		{
+			struct ccs_inet_acl *entry =
+				container_of(acl, typeof(*entry), head);
+			ccs_put_group(entry->address.group);
+			ccs_put_number_union(&entry->port);
+		}
+		break;
+	case CCS_TYPE_UNIX_ACL:
+		{
+			struct ccs_unix_acl *entry =
+				container_of(acl, typeof(*entry), head);
+			ccs_put_name_union(&entry->name);
+		}
+		break;
+#endif
+#ifdef CONFIG_CCSECURITY_MISC
+	case CCS_TYPE_ENV_ACL:
+		{
+			struct ccs_env_acl *entry =
+				container_of(acl, typeof(*entry), head);
+			ccs_put_name(entry->env);
+		}
+		break;
+#endif
+#ifdef CONFIG_CCSECURITY_CAPABILITY
+	case CCS_TYPE_CAPABILITY_ACL:
+		{
+			/* Nothing to do. */
+		}
+		break;
+#endif
+#ifdef CONFIG_CCSECURITY_IPC
+	case CCS_TYPE_SIGNAL_ACL:
+		{
+			struct ccs_signal_acl *entry =
+				container_of(acl, typeof(*entry), head);
+			ccs_put_number_union(&entry->sig);
+			ccs_put_name(entry->domainname);
+		}
+		break;
+#endif
+#ifdef CONFIG_CCSECURITY_TASK_EXECUTE_HANDLER
+	case CCS_TYPE_AUTO_EXECUTE_HANDLER:
+	case CCS_TYPE_DENIED_EXECUTE_HANDLER:
+		{
+			struct ccs_handler_acl *entry =
+				container_of(acl, typeof(*entry), head);
+			ccs_put_name(entry->handler);
+		}
+		break;
+#endif
+#ifdef CONFIG_CCSECURITY_TASK_DOMAIN_TRANSITION
+	case CCS_TYPE_AUTO_TASK_ACL:
+	case CCS_TYPE_MANUAL_TASK_ACL:
+		{
+			struct ccs_task_acl *entry =
+				container_of(acl, typeof(*entry), head);
+			ccs_put_name(entry->domainname);
+		}
+		break;
+#endif
+	}
+}
+
+/**
+ * ccs_del_domain - Delete members in "struct ccs_domain_info".
+ *
+ * @element: Pointer to "struct list_head".
+ *
+ * Returns nothing.
+ *
+ * Caller holds ccs_policy_lock mutex.
+ */
+static inline void ccs_del_domain(struct list_head *element)
+{
+	struct ccs_domain_info *domain =
+		container_of(element, typeof(*domain), list);
+	struct ccs_acl_info *acl;
+	struct ccs_acl_info *tmp;
+	/*
+	 * Since this domain is referenced from neither "struct ccs_io_buffer"
+	 * nor "struct task_struct", we can delete elements without checking
+	 * for is_deleted flag.
+	 */
+	list_for_each_entry_safe(acl, tmp, &domain->acl_info_list, list) {
+		ccs_del_acl(&acl->list);
+		ccs_memory_free(acl, CCS_ID_ACL);
+	}
+	ccs_put_name(domain->domainname);
+}
+
+/**
+ * ccs_del_path_group - Delete members in "struct ccs_path_group".
+ *
+ * @element: Pointer to "struct list_head".
+ *
+ * Returns nothing.
+ */
+static inline void ccs_del_path_group(struct list_head *element)
+{
+	struct ccs_path_group *member =
+		container_of(element, typeof(*member), head.list);
+	ccs_put_name(member->member_name);
+}
+
+/**
+ * ccs_del_group - Delete "struct ccs_group".
+ *
+ * @element: Pointer to "struct list_head".
+ *
+ * Returns nothing.
+ */
+static inline void ccs_del_group(struct list_head *element)
+{
+	struct ccs_group *group =
+		container_of(element, typeof(*group), head.list);
+	ccs_put_name(group->group_name);
+}
+
+/**
+ * ccs_del_address_group - Delete members in "struct ccs_address_group".
+ *
+ * @element: Pointer to "struct list_head".
+ *
+ * Returns nothing.
+ */
+static inline void ccs_del_address_group(struct list_head *element)
+{
+	/* Nothing to do. */
+}
+
+/**
+ * ccs_del_number_group - Delete members in "struct ccs_number_group".
+ *
+ * @element: Pointer to "struct list_head".
+ *
+ * Returns nothing.
+ */
+static inline void ccs_del_number_group(struct list_head *element)
+{
+	/* Nothing to do. */
+}
+
+/**
+ * ccs_del_reservedport - Delete members in "struct ccs_reserved".
+ *
+ * @element: Pointer to "struct list_head".
+ *
+ * Returns nothing.
+ */
+static inline void ccs_del_reservedport(struct list_head *element)
+{
+	/* Nothing to do. */
+}
+
+/**
+ * ccs_del_condition - Delete members in "struct ccs_condition".
+ *
+ * @element: Pointer to "struct list_head".
+ *
+ * Returns nothing.
+ */
+void ccs_del_condition(struct list_head *element)
+{
+	struct ccs_condition *cond = container_of(element, typeof(*cond),
+						  head.list);
+	const u16 condc = cond->condc;
+	const u16 numbers_count = cond->numbers_count;
+	const u16 names_count = cond->names_count;
+	const u16 argc = cond->argc;
+	const u16 envc = cond->envc;
+	unsigned int i;
+	const struct ccs_condition_element *condp
+		= (const struct ccs_condition_element *) (cond + 1);
+	struct ccs_number_union *numbers_p
+		= (struct ccs_number_union *) (condp + condc);
+	struct ccs_name_union *names_p
+		= (struct ccs_name_union *) (numbers_p + numbers_count);
+	const struct ccs_argv *argv
+		= (const struct ccs_argv *) (names_p + names_count);
+	const struct ccs_envp *envp
+		= (const struct ccs_envp *) (argv + argc);
+	for (i = 0; i < numbers_count; i++)
+		ccs_put_number_union(numbers_p++);
+	for (i = 0; i < names_count; i++)
+		ccs_put_name_union(names_p++);
+	for (i = 0; i < argc; argv++, i++)
+		ccs_put_name(argv->value);
+	for (i = 0; i < envc; envp++, i++) {
+		ccs_put_name(envp->name);
+		ccs_put_name(envp->value);
+	}
+	ccs_put_name(cond->transit);
+}
+
+/**
+ * ccs_del_name - Delete members in "struct ccs_name".
+ *
+ * @element: Pointer to "struct list_head".
+ *
+ * Returns nothing.
+ */
+static inline void ccs_del_name(struct list_head *element)
+{
+	/* Nothing to do. */
+}
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19)
+
+/**
+ * ccs_lock - Alternative for srcu_read_lock().
+ *
+ * Returns index number which has to be passed to ccs_unlock().
+ */
+int ccs_lock(void)
+{
+	int idx;
+	spin_lock(&ccs_counter_lock);
+	idx = ccs_counter.counter_idx;
+	ccs_counter.counter[idx]++;
+	spin_unlock(&ccs_counter_lock);
+	return idx;
+}
+
+/**
+ * ccs_unlock - Alternative for srcu_read_unlock().
+ *
+ * @idx: Index number returned by ccs_lock().
+ *
+ * Returns nothing.
+ */
+void ccs_unlock(const int idx)
+{
+	spin_lock(&ccs_counter_lock);
+	ccs_counter.counter[idx]--;
+	spin_unlock(&ccs_counter_lock);
+}
+
+/**
+ * ccs_synchronize_counter - Alternative for synchronize_srcu().
+ *
+ * Returns nothing.
+ */
+static void ccs_synchronize_counter(void)
+{
+	int idx;
+	int v;
+	/*
+	 * Change currently active counter's index. Make it visible to other
+	 * threads by doing it with ccs_counter_lock held.
+	 * This function is called by garbage collector thread, and the garbage
+	 * collector thread is exclusive. Therefore, it is guaranteed that
+	 * SRCU grace period has expired when returning from this function.
+	 */
+	spin_lock(&ccs_counter_lock);
+	idx = ccs_counter.counter_idx;
+	ccs_counter.counter_idx ^= 1;
+	v = ccs_counter.counter[idx];
+	spin_unlock(&ccs_counter_lock);
+	/* Wait for previously active counter to become 0. */
+	while (v) {
+		ssleep(1);
+		spin_lock(&ccs_counter_lock);
+		v = ccs_counter.counter[idx];
+		spin_unlock(&ccs_counter_lock);
+	}
+}
+
+#endif
+
+/**
+ * ccs_try_to_gc - Try to kfree() an entry.
+ *
+ * @type:    One of values in "enum ccs_policy_id".
+ * @element: Pointer to "struct list_head".
+ *
+ * Returns nothing.
+ *
+ * Caller holds ccs_policy_lock mutex.
+ */
+static void ccs_try_to_gc(const enum ccs_policy_id type,
+			  struct list_head *element)
+{
+	/*
+	 * __list_del_entry() guarantees that the list element became no longer
+	 * reachable from the list which the element was originally on (e.g.
+	 * ccs_domain_list). Also, synchronize_srcu() guarantees that the list
+	 * element became no longer referenced by syscall users.
+	 */
+	__list_del_entry(element);
+	mutex_unlock(&ccs_policy_lock);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 19)
+	synchronize_srcu(&ccs_ss);
+#else
+	ccs_synchronize_counter();
+#endif
+	/*
+	 * However, there are two users which may still be using the list
+	 * element. We need to defer until both users forget this element.
+	 *
+	 * Don't kfree() until "struct ccs_io_buffer"->r.{domain,group,acl} and
+	 * "struct ccs_io_buffer"->w.domain forget this element.
+	 */
+	if (ccs_struct_used_by_io_buffer(element))
+		goto reinject;
+	switch (type) {
+	case CCS_ID_TRANSITION_CONTROL:
+		ccs_del_transition_control(element);
+		break;
+	case CCS_ID_MANAGER:
+		ccs_del_manager(element);
+		break;
+	case CCS_ID_AGGREGATOR:
+		ccs_del_aggregator(element);
+		break;
+	case CCS_ID_GROUP:
+		ccs_del_group(element);
+		break;
+	case CCS_ID_PATH_GROUP:
+		ccs_del_path_group(element);
+		break;
+#ifdef CONFIG_CCSECURITY_NETWORK
+	case CCS_ID_ADDRESS_GROUP:
+		ccs_del_address_group(element);
+		break;
+#endif
+	case CCS_ID_NUMBER_GROUP:
+		ccs_del_number_group(element);
+		break;
+#ifdef CONFIG_CCSECURITY_PORTRESERVE
+	case CCS_ID_RESERVEDPORT:
+		ccs_del_reservedport(element);
+		break;
+#endif
+	case CCS_ID_CONDITION:
+		ccs_del_condition(element);
+		break;
+	case CCS_ID_NAME:
+		/*
+		 * Don't kfree() until all "struct ccs_io_buffer"->r.w[] forget
+		 * this element.
+		 */
+		if (ccs_name_used_by_io_buffer
+		    (container_of(element, typeof(struct ccs_name),
+				  head.list)->entry.name,
+		     container_of(element, typeof(struct ccs_name),
+				  head.list)->size))
+			goto reinject;
+		ccs_del_name(element);
+		break;
+	case CCS_ID_ACL:
+		ccs_del_acl(element);
+		break;
+	case CCS_ID_DOMAIN:
+		/*
+		 * Don't kfree() until all "struct task_struct" forget this
+		 * element.
+		 */
+		if (ccs_domain_used_by_task
+		    (container_of(element, typeof(struct ccs_domain_info),
+				  list)))
+			goto reinject;
+		break;
+	case CCS_MAX_POLICY:
+		break;
+	}
+	mutex_lock(&ccs_policy_lock);
+	if (type == CCS_ID_DOMAIN)
+		ccs_del_domain(element);
+	ccs_memory_free(element, type);
+	return;
+reinject:
+	/*
+	 * We can safely reinject this element here bacause
+	 * (1) Appending list elements and removing list elements are protected
+	 *     by ccs_policy_lock mutex.
+	 * (2) Only this function removes list elements and this function is
+	 *     exclusively executed by ccs_gc_mutex mutex.
+	 * are true.
+	 */
+	mutex_lock(&ccs_policy_lock);
+	list_add_rcu(element, element->prev);
+}
+
+/**
+ * ccs_collect_member - Delete elements with "struct ccs_acl_head".
+ *
+ * @id:          One of values in "enum ccs_policy_id".
+ * @member_list: Pointer to "struct list_head".
+ *
+ * Returns nothing.
+ *
+ * Caller holds ccs_policy_lock mutex.
+ */
+static void ccs_collect_member(const enum ccs_policy_id id,
+			       struct list_head *member_list)
+{
+	struct ccs_acl_head *member;
+	struct ccs_acl_head *tmp;
+	list_for_each_entry_safe(member, tmp, member_list, list) {
+		if (!member->is_deleted)
+			continue;
+		member->is_deleted = CCS_GC_IN_PROGRESS;
+		ccs_try_to_gc(id, &member->list);
+	}
+}
+
+/**
+ * ccs_collect_acl - Delete elements in "struct ccs_domain_info".
+ *
+ * @list: Pointer to "struct list_head".
+ *
+ * Returns nothing.
+ *
+ * Caller holds ccs_policy_lock mutex.
+ */
+static void ccs_collect_acl(struct list_head *list)
+{
+	struct ccs_acl_info *acl;
+	struct ccs_acl_info *tmp;
+	list_for_each_entry_safe(acl, tmp, list, list) {
+		if (!acl->is_deleted)
+			continue;
+		acl->is_deleted = CCS_GC_IN_PROGRESS;
+		ccs_try_to_gc(CCS_ID_ACL, &acl->list);
+	}
+}
+
+/**
+ * ccs_collect_entry - Try to kfree() deleted elements.
+ *
+ * Returns nothing.
+ */
+static void ccs_collect_entry(void)
+{
+	int i;
+	enum ccs_policy_id id;
+	struct ccs_policy_namespace *ns;
+	mutex_lock(&ccs_policy_lock);
+	{
+		struct ccs_domain_info *domain;
+		struct ccs_domain_info *tmp;
+		list_for_each_entry_safe(domain, tmp, &ccs_domain_list, list) {
+			ccs_collect_acl(&domain->acl_info_list);
+			if (!domain->is_deleted ||
+			    ccs_domain_used_by_task(domain))
+				continue;
+			ccs_try_to_gc(CCS_ID_DOMAIN, &domain->list);
+		}
+	}
+	list_for_each_entry(ns, &ccs_namespace_list, namespace_list) {
+		for (id = 0; id < CCS_MAX_POLICY; id++)
+			ccs_collect_member(id, &ns->policy_list[id]);
+		for (i = 0; i < CCS_MAX_ACL_GROUPS; i++)
+			ccs_collect_acl(&ns->acl_group[i]);
+	}
+	{
+		struct ccs_shared_acl_head *ptr;
+		struct ccs_shared_acl_head *tmp;
+		list_for_each_entry_safe(ptr, tmp, &ccs_condition_list, list) {
+			if (atomic_read(&ptr->users) > 0)
+				continue;
+			atomic_set(&ptr->users, CCS_GC_IN_PROGRESS);
+			ccs_try_to_gc(CCS_ID_CONDITION, &ptr->list);
+		}
+	}
+	list_for_each_entry(ns, &ccs_namespace_list, namespace_list) {
+		for (i = 0; i < CCS_MAX_GROUP; i++) {
+			struct list_head *list = &ns->group_list[i];
+			struct ccs_group *group;
+			struct ccs_group *tmp;
+			switch (i) {
+			case 0:
+				id = CCS_ID_PATH_GROUP;
+				break;
+			case 1:
+				id = CCS_ID_NUMBER_GROUP;
+				break;
+			default:
+#ifdef CONFIG_CCSECURITY_NETWORK
+				id = CCS_ID_ADDRESS_GROUP;
+#else
+				continue;
+#endif
+				break;
+			}
+			list_for_each_entry_safe(group, tmp, list, head.list) {
+				ccs_collect_member(id, &group->member_list);
+				if (!list_empty(&group->member_list) ||
+				    atomic_read(&group->head.users) > 0)
+					continue;
+				atomic_set(&group->head.users,
+					   CCS_GC_IN_PROGRESS);
+				ccs_try_to_gc(CCS_ID_GROUP, &group->head.list);
+			}
+		}
+	}
+	for (i = 0; i < CCS_MAX_HASH; i++) {
+		struct list_head *list = &ccs_name_list[i];
+		struct ccs_shared_acl_head *ptr;
+		struct ccs_shared_acl_head *tmp;
+		list_for_each_entry_safe(ptr, tmp, list, list) {
+			if (atomic_read(&ptr->users) > 0)
+				continue;
+			atomic_set(&ptr->users, CCS_GC_IN_PROGRESS);
+			ccs_try_to_gc(CCS_ID_NAME, &ptr->list);
+		}
+	}
+	mutex_unlock(&ccs_policy_lock);
+}
+
+/**
+ * ccs_gc_thread - Garbage collector thread function.
+ *
+ * @unused: Unused.
+ *
+ * Returns 0.
+ */
+static int ccs_gc_thread(void *unused)
+{
+	/* Garbage collector thread is exclusive. */
+	static DEFINE_MUTEX(ccs_gc_mutex);
+	if (!mutex_trylock(&ccs_gc_mutex))
+		goto out;
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 6)
+	/* daemonize() not needed. */
+#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 0)
+	daemonize("GC for CCS");
+#else
+	daemonize();
+	reparent_to_init();
+#if defined(TASK_DEAD)
+	{
+		struct task_struct *task = current;
+		spin_lock_irq(&task->sighand->siglock);
+		siginitsetinv(&task->blocked, 0);
+		recalc_sigpending();
+		spin_unlock_irq(&task->sighand->siglock);
+	}
+#else
+	{
+		struct task_struct *task = current;
+		spin_lock_irq(&task->sigmask_lock);
+		siginitsetinv(&task->blocked, 0);
+		recalc_sigpending(task);
+		spin_unlock_irq(&task->sigmask_lock);
+	}
+#endif
+	snprintf(current->comm, sizeof(current->comm) - 1, "GC for CCS");
+#endif
+	ccs_collect_entry();
+	{
+		struct ccs_io_buffer *head;
+		struct ccs_io_buffer *tmp;
+		spin_lock(&ccs_io_buffer_list_lock);
+		list_for_each_entry_safe(head, tmp, &ccs_io_buffer_list,
+					 list) {
+			if (head->users)
+				continue;
+			list_del(&head->list);
+			kfree(head->read_buf);
+			kfree(head->write_buf);
+			kfree(head);
+		}
+		spin_unlock(&ccs_io_buffer_list_lock);
+	}
+	mutex_unlock(&ccs_gc_mutex);
+out:
+	/* This acts as do_exit(0). */
+	return 0;
+}
+
+/**
+ * ccs_notify_gc - Register/unregister /proc/ccs/ users.
+ *
+ * @head:        Pointer to "struct ccs_io_buffer".
+ * @is_register: True if register, false if unregister.
+ *
+ * Returns nothing.
+ */
+void ccs_notify_gc(struct ccs_io_buffer *head, const bool is_register)
+{
+	bool is_write = false;
+	spin_lock(&ccs_io_buffer_list_lock);
+	if (is_register) {
+		head->users = 1;
+		list_add(&head->list, &ccs_io_buffer_list);
+	} else {
+		is_write = head->write_buf != NULL;
+		if (!--head->users) {
+			list_del(&head->list);
+			kfree(head->read_buf);
+			kfree(head->write_buf);
+			kfree(head);
+		}
+	}
+	spin_unlock(&ccs_io_buffer_list_lock);
+	if (is_write) {
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 6)
+		struct task_struct *task = kthread_create(ccs_gc_thread, NULL,
+							  "GC for CCS");
+		if (!IS_ERR(task))
+			wake_up_process(task);
+#else
+		kernel_thread(ccs_gc_thread, NULL, 0);
+#endif
+	}
+}
diff --git a/security/ccsecurity/internal.h b/security/ccsecurity/internal.h
new file mode 100644
index 0000000..3f703f2
--- /dev/null
+++ b/security/ccsecurity/internal.h
@@ -0,0 +1,2090 @@
+/*
+ * security/ccsecurity/internal.h
+ *
+ * Copyright (C) 2005-2012  NTT DATA CORPORATION
+ *
+ * Version: 1.8.4   2015/05/05
+ */
+
+#ifndef _SECURITY_CCSECURITY_INTERNAL_H
+#define _SECURITY_CCSECURITY_INTERNAL_H
+
+#include <linux/version.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/utime.h>
+#include <linux/file.h>
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 38)
+#include <linux/smp_lock.h>
+#endif
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/highmem.h>
+#include <linux/poll.h>
+#include <linux/binfmts.h>
+#include <linux/delay.h>
+#include <linux/sched.h>
+#include <linux/dcache.h>
+#include <linux/mount.h>
+#include <linux/net.h>
+#include <linux/inet.h>
+#include <linux/in.h>
+#include <linux/in6.h>
+#include <linux/un.h>
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0)
+#include <linux/fs.h>
+#endif
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 0)
+#include <linux/namei.h>
+#endif
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 30)
+#include <linux/fs_struct.h>
+#endif
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 20)
+#include <linux/namespace.h>
+#endif
+#include <linux/proc_fs.h>
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0) || defined(RHEL_MAJOR)
+#include <linux/hash.h>
+#endif
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 18) || (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 33) && defined(CONFIG_SYSCTL_SYSCALL))
+#include <linux/sysctl.h>
+#endif
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 6)
+#include <linux/kthread.h>
+#endif
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 10, 0)
+#include <linux/magic.h>
+#endif
+#include <stdarg.h>
+#include <asm/uaccess.h>
+#include <net/sock.h>
+#include <net/af_unix.h>
+#include <net/ip.h>
+#include <net/ipv6.h>
+#include <net/udp.h>
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0)
+#define sk_family family
+#define sk_protocol protocol
+#define sk_type type
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 20)
+
+/* Structure for holding "struct vfsmount *" and "struct dentry *". */
+struct path {
+	struct vfsmount *mnt;
+	struct dentry *dentry;
+};
+
+#endif
+
+#ifndef __printf
+#define __printf(a,b) __attribute__((format(printf,a,b)))
+#endif
+#ifndef __packed
+#define __packed __attribute__((__packed__))
+#endif
+#ifndef bool
+#define bool _Bool
+#endif
+#ifndef false
+#define false 0
+#endif
+#ifndef true
+#define true 1
+#endif
+
+#ifndef __user
+#define __user
+#endif
+
+#ifndef current_uid
+#define current_uid()   (current->uid)
+#endif
+#ifndef current_gid
+#define current_gid()   (current->gid)
+#endif
+#ifndef current_euid
+#define current_euid()  (current->euid)
+#endif
+#ifndef current_egid
+#define current_egid()  (current->egid)
+#endif
+#ifndef current_suid
+#define current_suid()  (current->suid)
+#endif
+#ifndef current_sgid
+#define current_sgid()  (current->sgid)
+#endif
+#ifndef current_fsuid
+#define current_fsuid() (current->fsuid)
+#endif
+#ifndef current_fsgid
+#define current_fsgid() (current->fsgid)
+#endif
+
+#ifndef DEFINE_SPINLOCK
+#define DEFINE_SPINLOCK(x) spinlock_t x = SPIN_LOCK_UNLOCKED
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 16)
+#define mutex semaphore
+#define mutex_init(mutex) init_MUTEX(mutex)
+#define mutex_unlock(mutex) up(mutex)
+#define mutex_lock(mutex) down(mutex)
+#define mutex_lock_interruptible(mutex) down_interruptible(mutex)
+#define mutex_trylock(mutex) (!down_trylock(mutex))
+#define DEFINE_MUTEX(mutexname) DECLARE_MUTEX(mutexname)
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 15)
+#define MS_UNBINDABLE	(1<<17)	/* change to unbindable */
+#define MS_PRIVATE	(1<<18)	/* change to private */
+#define MS_SLAVE	(1<<19)	/* change to slave */
+#define MS_SHARED	(1<<20)	/* change to shared */
+#endif
+
+#ifndef container_of
+#define container_of(ptr, type, member) ({				\
+			const typeof(((type *)0)->member) *__mptr = (ptr); \
+			(type *)((char *)__mptr - offsetof(type, member)); })
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 0)
+#define smp_read_barrier_depends smp_rmb
+#endif
+
+#ifndef ACCESS_ONCE
+#define ACCESS_ONCE(x) (*(volatile typeof(x) *)&(x))
+#endif
+
+#ifndef rcu_dereference
+#define rcu_dereference(p)     ({					\
+			typeof(p) _________p1 = ACCESS_ONCE(p);		\
+			smp_read_barrier_depends(); /* see RCU */	\
+			(_________p1);					\
+		})
+#endif
+
+#ifndef rcu_assign_pointer
+#define rcu_assign_pointer(p, v)			\
+	({						\
+		if (!__builtin_constant_p(v) ||		\
+		    ((v) != NULL))			\
+			smp_wmb(); /* see RCU */	\
+		(p) = (v);				\
+	})
+#endif
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 9, 0)
+#define f_vfsmnt f_path.mnt
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 14)
+
+/**
+ * kzalloc() - Allocate memory. The memory is set to zero.
+ *
+ * @size:  Size to allocate.
+ * @flags: GFP flags.
+ *
+ * Returns pointer to allocated memory on success, NULL otherwise.
+ *
+ * This is for compatibility with older kernels.
+ *
+ * Since several distributions backported kzalloc(), I define it as a macro
+ * rather than an inlined function in order to avoid multiple definition error.
+ */
+#define kzalloc(size, flags) ({					\
+			void *ret = kmalloc((size), (flags));	\
+			if (ret)				\
+				memset(ret, 0, (size));		\
+			ret; })
+
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 25)
+
+/**
+ * path_put - Drop reference on "struct path".
+ *
+ * @path: Pointer to "struct path".
+ *
+ * Returns nothing.
+ *
+ * This is for compatibility with older kernels.
+ */
+static inline void path_put(struct path *path)
+{
+	dput(path->dentry);
+	mntput(path->mnt);
+}
+
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0)
+
+/**
+ * __list_add_rcu - Insert a new entry between two known consecutive entries.
+ *
+ * @new:  Pointer to "struct list_head".
+ * @prev: Pointer to "struct list_head".
+ * @next: Pointer to "struct list_head".
+ *
+ * Returns nothing.
+ *
+ * This is for compatibility with older kernels.
+ */
+static inline void __list_add_rcu(struct list_head *new,
+				  struct list_head *prev,
+				  struct list_head *next)
+{
+	new->next = next;
+	new->prev = prev;
+	rcu_assign_pointer(prev->next, new);
+	next->prev = new;
+}
+
+/**
+ * list_add_tail_rcu - Add a new entry to rcu-protected list.
+ *
+ * @new:  Pointer to "struct list_head".
+ * @head: Pointer to "struct list_head".
+ *
+ * Returns nothing.
+ *
+ * This is for compatibility with older kernels.
+ */
+static inline void list_add_tail_rcu(struct list_head *new,
+				     struct list_head *head)
+{
+	__list_add_rcu(new, head->prev, head);
+}
+
+/**
+ * list_add_rcu - Add a new entry to rcu-protected list.
+ *
+ * @new:  Pointer to "struct list_head".
+ * @head: Pointer to "struct list_head".
+ *
+ * Returns nothing.
+ *
+ * This is for compatibility with older kernels.
+ */
+static inline void list_add_rcu(struct list_head *new, struct list_head *head)
+{
+	__list_add_rcu(new, head, head->next);
+}
+
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 38)
+
+/**
+ * __list_del_entry - Deletes entry from list without re-initialization.
+ *
+ * @entry: Pointer to "struct list_head".
+ *
+ * Returns nothing.
+ *
+ * This is for compatibility with older kernels.
+ */
+static inline void __list_del_entry(struct list_head *entry)
+{
+	__list_del(entry->prev, entry->next);
+}
+
+#endif
+
+#ifndef list_for_each_entry_safe
+
+/**
+ * list_for_each_entry_safe - Iterate over list of given type safe against removal of list entry.
+ *
+ * @pos:    The "type *" to use as a loop cursor.
+ * @n:      Another "type *" to use as temporary storage.
+ * @head:   Pointer to "struct list_head".
+ * @member: The name of the list_struct within the struct.
+ *
+ * This is for compatibility with older kernels.
+ */
+#define list_for_each_entry_safe(pos, n, head, member)                  \
+	for (pos = list_entry((head)->next, typeof(*pos), member),      \
+		     n = list_entry(pos->member.next, typeof(*pos), member); \
+	     &pos->member != (head);					\
+	     pos = n, n = list_entry(n->member.next, typeof(*n), member))
+
+#endif
+
+#ifndef srcu_dereference
+
+/**
+ * srcu_dereference - Fetch SRCU-protected pointer with checking.
+ *
+ * @p:  The pointer to read, prior to dereferencing.
+ * @ss: Pointer to "struct srcu_struct".
+ *
+ * Returns @p.
+ *
+ * This is for compatibility with older kernels.
+ */
+#define srcu_dereference(p, ss) rcu_dereference(p)
+
+#endif
+
+#ifndef list_for_each_entry_srcu
+
+/**
+ * list_for_each_entry_srcu - Iterate over rcu list of given type.
+ *
+ * @pos:    The type * to use as a loop cursor.
+ * @head:   The head for your list.
+ * @member: The name of the list_struct within the struct.
+ * @ss:     Pointer to "struct srcu_struct".
+ *
+ * As of 2.6.36, this macro is not provided because only TOMOYO wants it.
+ */
+#define list_for_each_entry_srcu(pos, head, member, ss)		      \
+	for (pos = list_entry(srcu_dereference((head)->next, ss),     \
+			      typeof(*pos), member);		      \
+	     prefetch(pos->member.next), &pos->member != (head);      \
+	     pos = list_entry(srcu_dereference(pos->member.next, ss), \
+			      typeof(*pos), member))
+
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 4, 30) || (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 0) && LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 9))
+
+#if LINUX_VERSION_CODE == KERNEL_VERSION(2, 4, 21)
+#undef ssleep
+#endif
+
+#ifndef ssleep
+
+/**
+ * ssleep - Sleep for specified seconds.
+ *
+ * @secs: Seconds to sleep.
+ *
+ * Returns nothing.
+ *
+ * This is for compatibility with older kernels.
+ *
+ * Since several distributions backported ssleep(), I define it as a macro
+ * rather than an inlined function in order to avoid multiple definition error.
+ */
+#define ssleep(secs) {						\
+		set_current_state(TASK_UNINTERRUPTIBLE);	\
+		schedule_timeout((HZ * secs) + 1);		\
+	}
+
+#endif
+
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 5, 0)
+
+/**
+ * from_kuid - Convert kuid_t to uid_t.
+ *
+ * @ns:  Unused.
+ * @uid: kuid_t value.
+ *
+ * Returns uid seen from init's user namespace.
+ */
+#define from_kuid(ns, uid) (uid)
+
+/**
+ * from_kgid - Convert kgid_t to gid_t.
+ *
+ * @ns:  Unused.
+ * @gid: kgid_t value.
+ *
+ * Returns gid seen from init's user namespace.
+ */
+#define from_kgid(ns, gid) (gid)
+
+/**
+ * uid_eq - Check whether the uids are equals or not.
+ *
+ * @left: Uid seen from current user namespace.
+ * @right: Uid seen from current user namespace.
+ *
+ * Returns true if uid is root in init's user namespace, false otherwise.
+ */
+#define uid_eq(left, right) ((left) == (right))
+#define GLOBAL_ROOT_UID 0
+
+#endif
+
+/*
+ * TOMOYO specific part start.
+ */
+
+#include <linux/ccsecurity.h>
+
+/* Enumeration definition for internal use. */
+
+/* Index numbers for Access Controls. */
+enum ccs_acl_entry_type_index {
+	CCS_TYPE_PATH_ACL,
+	CCS_TYPE_PATH2_ACL,
+	CCS_TYPE_PATH_NUMBER_ACL,
+	CCS_TYPE_MKDEV_ACL,
+	CCS_TYPE_MOUNT_ACL,
+#ifdef CONFIG_CCSECURITY_MISC
+	CCS_TYPE_ENV_ACL,
+#endif
+#ifdef CONFIG_CCSECURITY_CAPABILITY
+	CCS_TYPE_CAPABILITY_ACL,
+#endif
+#ifdef CONFIG_CCSECURITY_NETWORK
+	CCS_TYPE_INET_ACL,
+	CCS_TYPE_UNIX_ACL,
+#endif
+#ifdef CONFIG_CCSECURITY_IPC
+	CCS_TYPE_SIGNAL_ACL,
+#endif
+#ifdef CONFIG_CCSECURITY_TASK_EXECUTE_HANDLER
+	CCS_TYPE_AUTO_EXECUTE_HANDLER,
+	CCS_TYPE_DENIED_EXECUTE_HANDLER,
+#endif
+#ifdef CONFIG_CCSECURITY_TASK_DOMAIN_TRANSITION
+	CCS_TYPE_AUTO_TASK_ACL,
+	CCS_TYPE_MANUAL_TASK_ACL,
+#endif
+};
+
+/* Index numbers for "struct ccs_condition". */
+enum ccs_conditions_index {
+	CCS_TASK_UID,             /* current_uid()   */
+	CCS_TASK_EUID,            /* current_euid()  */
+	CCS_TASK_SUID,            /* current_suid()  */
+	CCS_TASK_FSUID,           /* current_fsuid() */
+	CCS_TASK_GID,             /* current_gid()   */
+	CCS_TASK_EGID,            /* current_egid()  */
+	CCS_TASK_SGID,            /* current_sgid()  */
+	CCS_TASK_FSGID,           /* current_fsgid() */
+	CCS_TASK_PID,             /* sys_getpid()   */
+	CCS_TASK_PPID,            /* sys_getppid()  */
+	CCS_EXEC_ARGC,            /* "struct linux_binprm *"->argc */
+	CCS_EXEC_ENVC,            /* "struct linux_binprm *"->envc */
+	CCS_TYPE_IS_SOCKET,       /* S_IFSOCK */
+	CCS_TYPE_IS_SYMLINK,      /* S_IFLNK */
+	CCS_TYPE_IS_FILE,         /* S_IFREG */
+	CCS_TYPE_IS_BLOCK_DEV,    /* S_IFBLK */
+	CCS_TYPE_IS_DIRECTORY,    /* S_IFDIR */
+	CCS_TYPE_IS_CHAR_DEV,     /* S_IFCHR */
+	CCS_TYPE_IS_FIFO,         /* S_IFIFO */
+	CCS_MODE_SETUID,          /* S_ISUID */
+	CCS_MODE_SETGID,          /* S_ISGID */
+	CCS_MODE_STICKY,          /* S_ISVTX */
+	CCS_MODE_OWNER_READ,      /* S_IRUSR */
+	CCS_MODE_OWNER_WRITE,     /* S_IWUSR */
+	CCS_MODE_OWNER_EXECUTE,   /* S_IXUSR */
+	CCS_MODE_GROUP_READ,      /* S_IRGRP */
+	CCS_MODE_GROUP_WRITE,     /* S_IWGRP */
+	CCS_MODE_GROUP_EXECUTE,   /* S_IXGRP */
+	CCS_MODE_OTHERS_READ,     /* S_IROTH */
+	CCS_MODE_OTHERS_WRITE,    /* S_IWOTH */
+	CCS_MODE_OTHERS_EXECUTE,  /* S_IXOTH */
+	CCS_TASK_TYPE,            /* ((u8) task->ccs_flags) &
+				     CCS_TASK_IS_EXECUTE_HANDLER */
+	CCS_TASK_EXECUTE_HANDLER, /* CCS_TASK_IS_EXECUTE_HANDLER */
+	CCS_EXEC_REALPATH,
+	CCS_SYMLINK_TARGET,
+	CCS_PATH1_UID,
+	CCS_PATH1_GID,
+	CCS_PATH1_INO,
+	CCS_PATH1_MAJOR,
+	CCS_PATH1_MINOR,
+	CCS_PATH1_PERM,
+	CCS_PATH1_TYPE,
+	CCS_PATH1_DEV_MAJOR,
+	CCS_PATH1_DEV_MINOR,
+	CCS_PATH2_UID,
+	CCS_PATH2_GID,
+	CCS_PATH2_INO,
+	CCS_PATH2_MAJOR,
+	CCS_PATH2_MINOR,
+	CCS_PATH2_PERM,
+	CCS_PATH2_TYPE,
+	CCS_PATH2_DEV_MAJOR,
+	CCS_PATH2_DEV_MINOR,
+	CCS_PATH1_PARENT_UID,
+	CCS_PATH1_PARENT_GID,
+	CCS_PATH1_PARENT_INO,
+	CCS_PATH1_PARENT_PERM,
+	CCS_PATH2_PARENT_UID,
+	CCS_PATH2_PARENT_GID,
+	CCS_PATH2_PARENT_INO,
+	CCS_PATH2_PARENT_PERM,
+	CCS_MAX_CONDITION_KEYWORD,
+	CCS_NUMBER_UNION,
+	CCS_NAME_UNION,
+	CCS_ARGV_ENTRY,
+	CCS_ENVP_ENTRY,
+};
+
+/* Index numbers for domain's attributes. */
+enum ccs_domain_info_flags_index {
+	/* Quota warnning flag.   */
+	CCS_DIF_QUOTA_WARNED,
+	/*
+	 * This domain was unable to create a new domain at
+	 * ccs_find_next_domain() because the name of the domain to be created
+	 * was too long or it could not allocate memory.
+	 * More than one process continued execve() without domain transition.
+	 */
+	CCS_DIF_TRANSITION_FAILED,
+	CCS_MAX_DOMAIN_INFO_FLAGS
+};
+
+/* Index numbers for audit type. */
+enum ccs_grant_log {
+	/* Follow profile's configuration. */
+	CCS_GRANTLOG_AUTO,
+	/* Do not generate grant log. */
+	CCS_GRANTLOG_NO,
+	/* Generate grant_log. */
+	CCS_GRANTLOG_YES,
+};
+
+/* Index numbers for group entries. */
+enum ccs_group_id {
+	CCS_PATH_GROUP,
+	CCS_NUMBER_GROUP,
+#ifdef CONFIG_CCSECURITY_NETWORK
+	CCS_ADDRESS_GROUP,
+#endif
+	CCS_MAX_GROUP
+};
+
+/* Index numbers for category of functionality. */
+enum ccs_mac_category_index {
+	CCS_MAC_CATEGORY_FILE,
+#ifdef CONFIG_CCSECURITY_NETWORK
+	CCS_MAC_CATEGORY_NETWORK,
+#endif
+#ifdef CONFIG_CCSECURITY_MISC
+	CCS_MAC_CATEGORY_MISC,
+#endif
+#ifdef CONFIG_CCSECURITY_IPC
+	CCS_MAC_CATEGORY_IPC,
+#endif
+#ifdef CONFIG_CCSECURITY_CAPABILITY
+	CCS_MAC_CATEGORY_CAPABILITY,
+#endif
+	CCS_MAX_MAC_CATEGORY_INDEX
+};
+
+/* Index numbers for functionality. */
+enum ccs_mac_index {
+	CCS_MAC_FILE_EXECUTE,
+	CCS_MAC_FILE_OPEN,
+	CCS_MAC_FILE_CREATE,
+	CCS_MAC_FILE_UNLINK,
+#ifdef CONFIG_CCSECURITY_FILE_GETATTR
+	CCS_MAC_FILE_GETATTR,
+#endif
+	CCS_MAC_FILE_MKDIR,
+	CCS_MAC_FILE_RMDIR,
+	CCS_MAC_FILE_MKFIFO,
+	CCS_MAC_FILE_MKSOCK,
+	CCS_MAC_FILE_TRUNCATE,
+	CCS_MAC_FILE_SYMLINK,
+	CCS_MAC_FILE_MKBLOCK,
+	CCS_MAC_FILE_MKCHAR,
+	CCS_MAC_FILE_LINK,
+	CCS_MAC_FILE_RENAME,
+	CCS_MAC_FILE_CHMOD,
+	CCS_MAC_FILE_CHOWN,
+	CCS_MAC_FILE_CHGRP,
+	CCS_MAC_FILE_IOCTL,
+	CCS_MAC_FILE_CHROOT,
+	CCS_MAC_FILE_MOUNT,
+	CCS_MAC_FILE_UMOUNT,
+	CCS_MAC_FILE_PIVOT_ROOT,
+#ifdef CONFIG_CCSECURITY_NETWORK
+	CCS_MAC_NETWORK_INET_STREAM_BIND,
+	CCS_MAC_NETWORK_INET_STREAM_LISTEN,
+	CCS_MAC_NETWORK_INET_STREAM_CONNECT,
+	CCS_MAC_NETWORK_INET_STREAM_ACCEPT,
+	CCS_MAC_NETWORK_INET_DGRAM_BIND,
+	CCS_MAC_NETWORK_INET_DGRAM_SEND,
+#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG
+	CCS_MAC_NETWORK_INET_DGRAM_RECV,
+#endif
+	CCS_MAC_NETWORK_INET_RAW_BIND,
+	CCS_MAC_NETWORK_INET_RAW_SEND,
+#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG
+	CCS_MAC_NETWORK_INET_RAW_RECV,
+#endif
+	CCS_MAC_NETWORK_UNIX_STREAM_BIND,
+	CCS_MAC_NETWORK_UNIX_STREAM_LISTEN,
+	CCS_MAC_NETWORK_UNIX_STREAM_CONNECT,
+	CCS_MAC_NETWORK_UNIX_STREAM_ACCEPT,
+	CCS_MAC_NETWORK_UNIX_DGRAM_BIND,
+	CCS_MAC_NETWORK_UNIX_DGRAM_SEND,
+#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG
+	CCS_MAC_NETWORK_UNIX_DGRAM_RECV,
+#endif
+	CCS_MAC_NETWORK_UNIX_SEQPACKET_BIND,
+	CCS_MAC_NETWORK_UNIX_SEQPACKET_LISTEN,
+	CCS_MAC_NETWORK_UNIX_SEQPACKET_CONNECT,
+	CCS_MAC_NETWORK_UNIX_SEQPACKET_ACCEPT,
+#endif
+#ifdef CONFIG_CCSECURITY_MISC
+	CCS_MAC_ENVIRON,
+#endif
+#ifdef CONFIG_CCSECURITY_IPC
+	CCS_MAC_SIGNAL,
+#endif
+#ifdef CONFIG_CCSECURITY_CAPABILITY
+	CCS_MAC_CAPABILITY_USE_ROUTE_SOCKET,
+	CCS_MAC_CAPABILITY_USE_PACKET_SOCKET,
+	CCS_MAC_CAPABILITY_SYS_REBOOT,
+	CCS_MAC_CAPABILITY_SYS_VHANGUP,
+	CCS_MAC_CAPABILITY_SYS_SETTIME,
+	CCS_MAC_CAPABILITY_SYS_NICE,
+	CCS_MAC_CAPABILITY_SYS_SETHOSTNAME,
+	CCS_MAC_CAPABILITY_USE_KERNEL_MODULE,
+	CCS_MAC_CAPABILITY_SYS_KEXEC_LOAD,
+	CCS_MAC_CAPABILITY_SYS_PTRACE,
+#endif
+	CCS_MAX_MAC_INDEX
+};
+
+/* Index numbers for /proc/ccs/stat interface. */
+enum ccs_memory_stat_type {
+	CCS_MEMORY_POLICY,
+	CCS_MEMORY_AUDIT,
+	CCS_MEMORY_QUERY,
+	CCS_MAX_MEMORY_STAT
+};
+
+/* Index numbers for access controls with one pathname and three numbers. */
+enum ccs_mkdev_acl_index {
+	CCS_TYPE_MKBLOCK,
+	CCS_TYPE_MKCHAR,
+	CCS_MAX_MKDEV_OPERATION
+};
+
+/* Index numbers for operation mode. */
+enum ccs_mode_value {
+	CCS_CONFIG_DISABLED,
+	CCS_CONFIG_LEARNING,
+	CCS_CONFIG_PERMISSIVE,
+	CCS_CONFIG_ENFORCING,
+	CCS_CONFIG_MAX_MODE,
+	CCS_CONFIG_WANT_REJECT_LOG =  64,
+	CCS_CONFIG_WANT_GRANT_LOG  = 128,
+	CCS_CONFIG_USE_DEFAULT     = 255,
+};
+
+/* Index numbers for socket operations. */
+enum ccs_network_acl_index {
+	CCS_NETWORK_BIND,    /* bind() operation. */
+	CCS_NETWORK_LISTEN,  /* listen() operation. */
+	CCS_NETWORK_CONNECT, /* connect() operation. */
+	CCS_NETWORK_ACCEPT,  /* accept() operation. */
+	CCS_NETWORK_SEND,    /* send() operation. */
+#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG
+	CCS_NETWORK_RECV,    /* recv() operation. */
+#endif
+	CCS_MAX_NETWORK_OPERATION
+};
+
+/* Index numbers for access controls with two pathnames. */
+enum ccs_path2_acl_index {
+	CCS_TYPE_LINK,
+	CCS_TYPE_RENAME,
+	CCS_TYPE_PIVOT_ROOT,
+	CCS_MAX_PATH2_OPERATION
+};
+
+/* Index numbers for access controls with one pathname. */
+enum ccs_path_acl_index {
+	CCS_TYPE_EXECUTE,
+	CCS_TYPE_READ,
+	CCS_TYPE_WRITE,
+	CCS_TYPE_APPEND,
+	CCS_TYPE_UNLINK,
+#ifdef CONFIG_CCSECURITY_FILE_GETATTR
+	CCS_TYPE_GETATTR,
+#endif
+	CCS_TYPE_RMDIR,
+	CCS_TYPE_TRUNCATE,
+	CCS_TYPE_SYMLINK,
+	CCS_TYPE_CHROOT,
+	CCS_TYPE_UMOUNT,
+	CCS_MAX_PATH_OPERATION
+};
+
+/* Index numbers for access controls with one pathname and one number. */
+enum ccs_path_number_acl_index {
+	CCS_TYPE_CREATE,
+	CCS_TYPE_MKDIR,
+	CCS_TYPE_MKFIFO,
+	CCS_TYPE_MKSOCK,
+	CCS_TYPE_IOCTL,
+	CCS_TYPE_CHMOD,
+	CCS_TYPE_CHOWN,
+	CCS_TYPE_CHGRP,
+	CCS_MAX_PATH_NUMBER_OPERATION
+};
+
+/* Index numbers for stat(). */
+enum ccs_path_stat_index {
+	/* Do not change this order. */
+	CCS_PATH1,
+	CCS_PATH1_PARENT,
+	CCS_PATH2,
+	CCS_PATH2_PARENT,
+	CCS_MAX_PATH_STAT
+};
+
+/* Index numbers for entry type. */
+enum ccs_policy_id {
+#ifdef CONFIG_CCSECURITY_PORTRESERVE
+	CCS_ID_RESERVEDPORT,
+#endif
+	CCS_ID_GROUP,
+#ifdef CONFIG_CCSECURITY_NETWORK
+	CCS_ID_ADDRESS_GROUP,
+#endif
+	CCS_ID_PATH_GROUP,
+	CCS_ID_NUMBER_GROUP,
+	CCS_ID_AGGREGATOR,
+	CCS_ID_TRANSITION_CONTROL,
+	CCS_ID_MANAGER,
+	CCS_ID_CONDITION,
+	CCS_ID_NAME,
+	CCS_ID_ACL,
+	CCS_ID_DOMAIN,
+	CCS_MAX_POLICY
+};
+
+/* Index numbers for /proc/ccs/stat interface. */
+enum ccs_policy_stat_type {
+	/* Do not change this order. */
+	CCS_STAT_POLICY_UPDATES,
+	CCS_STAT_POLICY_LEARNING,   /* == CCS_CONFIG_LEARNING */
+	CCS_STAT_POLICY_PERMISSIVE, /* == CCS_CONFIG_PERMISSIVE */
+	CCS_STAT_POLICY_ENFORCING,  /* == CCS_CONFIG_ENFORCING */
+	CCS_MAX_POLICY_STAT
+};
+
+/* Index numbers for profile's PREFERENCE values. */
+enum ccs_pref_index {
+	CCS_PREF_MAX_AUDIT_LOG,
+	CCS_PREF_MAX_LEARNING_ENTRY,
+	CCS_PREF_ENFORCING_PENALTY,
+	CCS_MAX_PREF
+};
+
+/* Index numbers for /proc/ccs/ interfaces. */
+enum ccs_proc_interface_index {
+	CCS_DOMAIN_POLICY,
+	CCS_EXCEPTION_POLICY,
+	CCS_PROCESS_STATUS,
+	CCS_STAT,
+	CCS_AUDIT,
+	CCS_VERSION,
+	CCS_PROFILE,
+	CCS_QUERY,
+	CCS_MANAGER,
+#ifdef CONFIG_CCSECURITY_TASK_EXECUTE_HANDLER
+	CCS_EXECUTE_HANDLER,
+#endif
+};
+
+/* Index numbers for special mount operations. */
+enum ccs_special_mount {
+	CCS_MOUNT_BIND,            /* mount --bind /source /dest   */
+	CCS_MOUNT_MOVE,            /* mount --move /old /new       */
+	CCS_MOUNT_REMOUNT,         /* mount -o remount /dir        */
+	CCS_MOUNT_MAKE_UNBINDABLE, /* mount --make-unbindable /dir */
+	CCS_MOUNT_MAKE_PRIVATE,    /* mount --make-private /dir    */
+	CCS_MOUNT_MAKE_SLAVE,      /* mount --make-slave /dir      */
+	CCS_MOUNT_MAKE_SHARED,     /* mount --make-shared /dir     */
+	CCS_MAX_SPECIAL_MOUNT
+};
+
+/* Index numbers for domain transition control keywords. */
+enum ccs_transition_type {
+	/* Do not change this order, */
+	CCS_TRANSITION_CONTROL_NO_RESET,
+	CCS_TRANSITION_CONTROL_RESET,
+	CCS_TRANSITION_CONTROL_NO_INITIALIZE,
+	CCS_TRANSITION_CONTROL_INITIALIZE,
+	CCS_TRANSITION_CONTROL_NO_KEEP,
+	CCS_TRANSITION_CONTROL_KEEP,
+	CCS_MAX_TRANSITION_TYPE
+};
+
+/* Index numbers for type of numeric values. */
+enum ccs_value_type {
+	CCS_VALUE_TYPE_INVALID,
+	CCS_VALUE_TYPE_DECIMAL,
+	CCS_VALUE_TYPE_OCTAL,
+	CCS_VALUE_TYPE_HEXADECIMAL,
+};
+
+/* Constants definition for internal use. */
+
+/*
+ * TOMOYO uses this hash only when appending a string into the string table.
+ * Frequency of appending strings is very low. So we don't need large (e.g.
+ * 64k) hash size. 256 will be sufficient.
+ */
+#define CCS_HASH_BITS 8
+#define CCS_MAX_HASH (1u << CCS_HASH_BITS)
+
+/*
+ * TOMOYO checks only SOCK_STREAM, SOCK_DGRAM, SOCK_RAW, SOCK_SEQPACKET.
+ * Therefore, we don't need SOCK_MAX.
+ */
+#define CCS_SOCK_MAX 6
+
+/* Size of temporary buffer for execve() operation. */
+#define CCS_EXEC_TMPSIZE     4096
+
+/* Garbage collector is trying to kfree() this element. */
+#define CCS_GC_IN_PROGRESS -1
+
+/* Profile number is an integer between 0 and 255. */
+#define CCS_MAX_PROFILES 256
+
+/* Group number is an integer between 0 and 255. */
+#define CCS_MAX_ACL_GROUPS 256
+
+/* Current thread is doing open(O_RDONLY | O_TRUNC) ? */
+#define CCS_OPEN_FOR_READ_TRUNCATE        1
+/* Current thread is doing open(3) ? */
+#define CCS_OPEN_FOR_IOCTL_ONLY           2
+/* Current thread is doing do_execve() ? */
+#define CCS_TASK_IS_IN_EXECVE             4
+/* Current thread is running as an execute handler program? */
+#define CCS_TASK_IS_EXECUTE_HANDLER       8
+/* Current thread is allowed to modify policy via /proc/ccs/ interface? */
+#define CCS_TASK_IS_MANAGER              16
+
+/*
+ * Retry this request. Returned by ccs_supervisor() if policy violation has
+ * occurred in enforcing mode and the userspace daemon decided to retry.
+ *
+ * We must choose a positive value in order to distinguish "granted" (which is
+ * 0) and "rejected" (which is a negative value) and "retry".
+ */
+#define CCS_RETRY_REQUEST 1
+
+/* Ignore gfp flags which are not supported. */
+#ifndef __GFP_HIGHIO
+#define __GFP_HIGHIO 0
+#endif
+#ifndef __GFP_NOWARN
+#define __GFP_NOWARN 0
+#endif
+#ifndef __GFP_NORETRY
+#define __GFP_NORETRY 0
+#endif
+#ifndef __GFP_NOMEMALLOC
+#define __GFP_NOMEMALLOC 0
+#endif
+
+/* The gfp flags used by TOMOYO. */
+#define CCS_GFP_FLAGS (__GFP_WAIT | __GFP_IO | __GFP_HIGHIO | __GFP_NOWARN | \
+		       __GFP_NORETRY | __GFP_NOMEMALLOC)
+
+/* Size of read buffer for /proc/ccs/ interface. */
+#define CCS_MAX_IO_READ_QUEUE 64
+
+/* Structure definition for internal use. */
+
+/* Common header for holding ACL entries. */
+struct ccs_acl_head {
+	struct list_head list;
+	s8 is_deleted; /* true or false or CCS_GC_IN_PROGRESS */
+} __packed;
+
+/* Common header for shared entries. */
+struct ccs_shared_acl_head {
+	struct list_head list;
+	atomic_t users;
+} __packed;
+
+/* Common header for individual entries. */
+struct ccs_acl_info {
+	struct list_head list;
+	struct ccs_condition *cond; /* Maybe NULL. */
+	s8 is_deleted; /* true or false or CCS_GC_IN_PROGRESS */
+	u8 type; /* One of values in "enum ccs_acl_entry_type_index". */
+	u16 perm;
+} __packed;
+
+/* Structure for holding a word. */
+struct ccs_name_union {
+	/* Either @filename or @group is NULL. */
+	const struct ccs_path_info *filename;
+	struct ccs_group *group;
+};
+
+/* Structure for holding a number. */
+struct ccs_number_union {
+	unsigned long values[2];
+	struct ccs_group *group; /* Maybe NULL. */
+	/* One of values in "enum ccs_value_type". */
+	u8 value_type[2];
+};
+
+/* Structure for holding an IP address. */
+struct ccs_ipaddr_union {
+	struct in6_addr ip[2]; /* Big endian. */
+	struct ccs_group *group; /* Pointer to address group. */
+	bool is_ipv6; /* Valid only if @group == NULL. */
+};
+
+/* Structure for "path_group"/"number_group"/"address_group" directive. */
+struct ccs_group {
+	struct ccs_shared_acl_head head;
+	/* Name of group (without leading '@'). */
+	const struct ccs_path_info *group_name;
+	/*
+	 * List of "struct ccs_path_group" or "struct ccs_number_group" or
+	 * "struct ccs_address_group".
+	 */
+	struct list_head member_list;
+};
+
+/* Structure for "path_group" directive. */
+struct ccs_path_group {
+	struct ccs_acl_head head;
+	const struct ccs_path_info *member_name;
+};
+
+/* Structure for "number_group" directive. */
+struct ccs_number_group {
+	struct ccs_acl_head head;
+	struct ccs_number_union number;
+};
+
+/* Structure for "address_group" directive. */
+struct ccs_address_group {
+	struct ccs_acl_head head;
+	/* Structure for holding an IP address. */
+	struct ccs_ipaddr_union address;
+};
+
+/* Subset of "struct stat". Used by conditional ACL and audit logs. */
+struct ccs_mini_stat {
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 5, 0)
+	kuid_t uid;
+	kgid_t gid;
+#else
+	uid_t uid;
+	gid_t gid;
+#endif
+	ino_t ino;
+	umode_t mode;
+	dev_t dev;
+	dev_t rdev;
+};
+
+/* Structure for dumping argv[] and envp[] of "struct linux_binprm". */
+struct ccs_page_dump {
+	struct page *page;    /* Previously dumped page. */
+	char *data;           /* Contents of "page". Size is PAGE_SIZE. */
+};
+
+/* Structure for attribute checks in addition to pathname checks. */
+struct ccs_obj_info {
+	/* True if ccs_get_attributes() was already called, false otherwise. */
+	bool validate_done;
+	/* True if @stat[] is valid. */
+	bool stat_valid[CCS_MAX_PATH_STAT];
+	/* First pathname. Initialized with { NULL, NULL } if no path. */
+	struct path path1;
+	/* Second pathname. Initialized with { NULL, NULL } if no path. */
+	struct path path2;
+	/*
+	 * Information on @path1, @path1's parent directory, @path2, @path2's
+	 * parent directory.
+	 */
+	struct ccs_mini_stat stat[CCS_MAX_PATH_STAT];
+	/*
+	 * Content of symbolic link to be created. NULL for operations other
+	 * than symlink().
+	 */
+	struct ccs_path_info *symlink_target;
+};
+
+/* Structure for entries which follows "struct ccs_condition". */
+struct ccs_condition_element {
+	/*
+	 * Left hand operand. A "struct ccs_argv" for CCS_ARGV_ENTRY, a
+	 * "struct ccs_envp" for CCS_ENVP_ENTRY is attached to the tail
+	 * of the array of this struct.
+	 */
+	u8 left;
+	/*
+	 * Right hand operand. A "struct ccs_number_union" for
+	 * CCS_NUMBER_UNION, a "struct ccs_name_union" for CCS_NAME_UNION is
+	 * attached to the tail of the array of this struct.
+	 */
+	u8 right;
+	/* Equation operator. True if equals or overlaps, false otherwise. */
+	bool equals;
+};
+
+/* Structure for optional arguments. */
+struct ccs_condition {
+	struct ccs_shared_acl_head head;
+	u32 size; /* Memory size allocated for this entry. */
+	u16 condc; /* Number of conditions in this struct. */
+	u16 numbers_count; /* Number of "struct ccs_number_union values". */
+	u16 names_count; /* Number of "struct ccs_name_union names". */
+	u16 argc; /* Number of "struct ccs_argv". */
+	u16 envc; /* Number of "struct ccs_envp". */
+	u8 grant_log; /* One of values in "enum ccs_grant_log". */
+	bool exec_transit; /* True if transit is for "file execute". */
+	const struct ccs_path_info *transit; /* Maybe NULL. */
+	/*
+	 * struct ccs_condition_element condition[condc];
+	 * struct ccs_number_union values[numbers_count];
+	 * struct ccs_name_union names[names_count];
+	 * struct ccs_argv argv[argc];
+	 * struct ccs_envp envp[envc];
+	 */
+};
+
+struct ccs_execve;
+struct ccs_policy_namespace;
+
+/* Structure for request info. */
+struct ccs_request_info {
+	/*
+	 * For holding parameters specific to operations which deal files.
+	 * NULL if not dealing files.
+	 */
+	struct ccs_obj_info *obj;
+	/*
+	 * For holding parameters specific to execve() request.
+	 * NULL if not dealing do_execve().
+	 */
+	struct ccs_execve *ee;
+	/*
+	 * For holding parameters.
+	 * Pointers in this union are not NULL except path->matched_path.
+	 */
+	union {
+		struct {
+			const struct ccs_path_info *filename;
+			/*
+			 * For using wildcards at ccs_find_next_domain().
+			 *
+			 * The matched_acl cannot be used because it may refer
+			 * a "struct ccs_path_acl" with ->is_group == true.
+			 * We want to use exact "struct ccs_path_info" rather
+			 * than "struct ccs_path_acl".
+			 */
+			const struct ccs_path_info *matched_path;
+			/* One of values in "enum ccs_path_acl_index". */
+			u8 operation;
+		} path;
+		struct {
+			const struct ccs_path_info *filename1;
+			const struct ccs_path_info *filename2;
+			/* One of values in "enum ccs_path2_acl_index". */
+			u8 operation;
+		} path2;
+		struct {
+			const struct ccs_path_info *filename;
+			unsigned int mode;
+			unsigned int major;
+			unsigned int minor;
+			/* One of values in "enum ccs_mkdev_acl_index". */
+			u8 operation;
+		} mkdev;
+		struct {
+			const struct ccs_path_info *filename;
+			unsigned long number;
+			/*
+			 * One of values in "enum ccs_path_number_acl_index".
+			 */
+			u8 operation;
+		} path_number;
+#ifdef CONFIG_CCSECURITY_NETWORK
+		struct {
+			const u32 *address; /* Big endian. */
+			u16 port; /* Host endian. */
+			/* One of values smaller than CCS_SOCK_MAX. */
+			u8 protocol;
+			/* One of values in "enum ccs_network_acl_index". */
+			u8 operation;
+			bool is_ipv6;
+		} inet_network;
+		struct {
+			const struct ccs_path_info *address;
+			/* One of values smaller than CCS_SOCK_MAX. */
+			u8 protocol;
+			/* One of values in "enum ccs_network_acl_index". */
+			u8 operation;
+		} unix_network;
+#endif
+#ifdef CONFIG_CCSECURITY_MISC
+		struct {
+			const struct ccs_path_info *name;
+		} environ;
+#endif
+#ifdef CONFIG_CCSECURITY_CAPABILITY
+		struct {
+			/* One of values in "enum ccs_capability_acl_index". */
+			u8 operation;
+		} capability;
+#endif
+#ifdef CONFIG_CCSECURITY_IPC
+		struct {
+			const char *dest_pattern;
+			int sig;
+		} signal;
+#endif
+		struct {
+			const struct ccs_path_info *type;
+			const struct ccs_path_info *dir;
+			const struct ccs_path_info *dev;
+			unsigned long flags;
+			int need_dev;
+		} mount;
+#ifdef CONFIG_CCSECURITY_TASK_DOMAIN_TRANSITION
+		struct {
+			const struct ccs_path_info *domainname;
+		} task;
+#endif
+	} param;
+	/*
+	 * For updating current->ccs_domain_info at ccs_update_task_domain().
+	 * Initialized to NULL at ccs_init_request_info().
+	 * Matching "struct ccs_acl_info" is copied if access request was
+	 * granted. Re-initialized to NULL at ccs_update_task_domain().
+	 */
+	struct ccs_acl_info *matched_acl;
+	u8 param_type; /* One of values in "enum ccs_acl_entry_type_index". */
+	bool granted; /* True if granted, false otherwise. */
+	/* True if current thread should not be carried sleep penalty. */
+	bool dont_sleep_on_enforce_error;
+	/*
+	 * For counting number of retries made for this request.
+	 * This counter is incremented whenever ccs_supervisor() returned
+	 * CCS_RETRY_REQUEST.
+	 */
+	u8 retry;
+	/*
+	 * For holding profile number used for this request.
+	 * One of values between 0 and CCS_MAX_PROFILES - 1.
+	 */
+	u8 profile;
+	/*
+	 * For holding operation mode used for this request.
+	 * One of CCS_CONFIG_DISABLED, CCS_CONFIG_LEARNING,
+	 * CCS_CONFIG_PERMISSIVE, CCS_CONFIG_ENFORCING.
+	 */
+	u8 mode;
+	/*
+	 * For holding operation index used for this request.
+	 * Used by ccs_init_request_info() / ccs_get_mode() /
+	 * ccs_write_log(). One of values in "enum ccs_mac_index".
+	 */
+	u8 type;
+};
+
+/* Structure for holding a token. */
+struct ccs_path_info {
+	const char *name;
+	u32 hash;          /* = full_name_hash(name, strlen(name)) */
+	u16 total_len;     /* = strlen(name)                       */
+	u16 const_len;     /* = ccs_const_part_length(name)        */
+	bool is_dir;       /* = ccs_strendswith(name, "/")         */
+	bool is_patterned; /* = const_len < total_len              */
+};
+
+/* Structure for execve() operation. */
+struct ccs_execve {
+	struct ccs_request_info r;
+	struct ccs_obj_info obj;
+	struct linux_binprm *bprm;
+	struct ccs_domain_info *previous_domain;
+	const struct ccs_path_info *transition;
+	/* For execute_handler */
+	const struct ccs_path_info *handler;
+	char *handler_path; /* = kstrdup(handler->name, CCS_GFP_FLAGS) */
+	/* For dumping argv[] and envp[]. */
+	struct ccs_page_dump dump;
+	/* For temporary use. */
+	char *tmp; /* Size is CCS_EXEC_TMPSIZE bytes */
+};
+
+/* Structure for domain information. */
+struct ccs_domain_info {
+	struct list_head list;
+	struct list_head acl_info_list;
+	/* Name of this domain. Never NULL.          */
+	const struct ccs_path_info *domainname;
+	/* Namespace for this domain. Never NULL. */
+	struct ccs_policy_namespace *ns;
+	/* Group numbers to use. */
+	unsigned long group[CCS_MAX_ACL_GROUPS / BITS_PER_LONG];
+	u8 profile;        /* Profile number to use. */
+	bool is_deleted;   /* Delete flag.           */
+	bool flags[CCS_MAX_DOMAIN_INFO_FLAGS];
+};
+
+/*
+ * Structure for "reset_domain"/"no_reset_domain"/"initialize_domain"/
+ * "no_initialize_domain"/"keep_domain"/"no_keep_domain" keyword.
+ */
+struct ccs_transition_control {
+	struct ccs_acl_head head;
+	u8 type; /* One of values in "enum ccs_transition_type" */
+	bool is_last_name; /* True if the domainname is ccs_last_word(). */
+	const struct ccs_path_info *domainname; /* Maybe NULL */
+	const struct ccs_path_info *program;    /* Maybe NULL */
+};
+
+/* Structure for "aggregator" keyword. */
+struct ccs_aggregator {
+	struct ccs_acl_head head;
+	const struct ccs_path_info *original_name;
+	const struct ccs_path_info *aggregated_name;
+};
+
+/* Structure for "deny_autobind" keyword. */
+struct ccs_reserved {
+	struct ccs_acl_head head;
+	struct ccs_number_union port;
+};
+
+/* Structure for policy manager. */
+struct ccs_manager {
+	struct ccs_acl_head head;
+	/* A path to program or a domainname. */
+	const struct ccs_path_info *manager;
+};
+
+/* Structure for argv[]. */
+struct ccs_argv {
+	unsigned long index;
+	const struct ccs_path_info *value;
+	bool is_not;
+};
+
+/* Structure for envp[]. */
+struct ccs_envp {
+	const struct ccs_path_info *name;
+	const struct ccs_path_info *value;
+	bool is_not;
+};
+
+/*
+ * Structure for "task auto_execute_handler" and "task denied_execute_handler"
+ * directive.
+ *
+ * If "task auto_execute_handler" directive exists and the current process is
+ * not an execute handler, all execve() requests are replaced by execve()
+ * requests of a program specified by "task auto_execute_handler" directive.
+ * If the current process is an execute handler, "task auto_execute_handler"
+ * and "task denied_execute_handler" directives are ignored.
+ * The program specified by "task execute_handler" validates execve()
+ * parameters and executes the original execve() requests if appropriate.
+ *
+ * "task denied_execute_handler" directive is used only when execve() request
+ * was rejected in enforcing mode (i.e. CONFIG::file::execute={ mode=enforcing
+ * }). The program specified by "task denied_execute_handler" does whatever it
+ * wants to do (e.g. silently terminate, change firewall settings, redirect the
+ * user to honey pot etc.).
+ */
+struct ccs_handler_acl {
+	struct ccs_acl_info head;       /* type = CCS_TYPE_*_EXECUTE_HANDLER */
+	const struct ccs_path_info *handler; /* Pointer to single pathname.  */
+};
+
+/*
+ * Structure for "task auto_domain_transition" and
+ * "task manual_domain_transition" directive.
+ */
+struct ccs_task_acl {
+	struct ccs_acl_info head; /* type = CCS_TYPE_*_TASK_ACL */
+	/* Pointer to domainname. */
+	const struct ccs_path_info *domainname;
+};
+
+/*
+ * Structure for "file execute", "file read", "file write", "file append",
+ * "file unlink", "file getattr", "file rmdir", "file truncate",
+ * "file symlink", "file chroot" and "file unmount" directive.
+ */
+struct ccs_path_acl {
+	struct ccs_acl_info head; /* type = CCS_TYPE_PATH_ACL */
+	struct ccs_name_union name;
+};
+
+/*
+ * Structure for "file rename", "file link" and "file pivot_root" directive.
+ */
+struct ccs_path2_acl {
+	struct ccs_acl_info head; /* type = CCS_TYPE_PATH2_ACL */
+	struct ccs_name_union name1;
+	struct ccs_name_union name2;
+};
+
+/*
+ * Structure for "file create", "file mkdir", "file mkfifo", "file mksock",
+ * "file ioctl", "file chmod", "file chown" and "file chgrp" directive.
+ */
+struct ccs_path_number_acl {
+	struct ccs_acl_info head; /* type = CCS_TYPE_PATH_NUMBER_ACL */
+	struct ccs_name_union name;
+	struct ccs_number_union number;
+};
+
+/* Structure for "file mkblock" and "file mkchar" directive. */
+struct ccs_mkdev_acl {
+	struct ccs_acl_info head; /* type = CCS_TYPE_MKDEV_ACL */
+	struct ccs_name_union name;
+	struct ccs_number_union mode;
+	struct ccs_number_union major;
+	struct ccs_number_union minor;
+};
+
+/* Structure for "file mount" directive. */
+struct ccs_mount_acl {
+	struct ccs_acl_info head; /* type = CCS_TYPE_MOUNT_ACL */
+	struct ccs_name_union dev_name;
+	struct ccs_name_union dir_name;
+	struct ccs_name_union fs_type;
+	struct ccs_number_union flags;
+};
+
+/* Structure for "misc env" directive in domain policy. */
+struct ccs_env_acl {
+	struct ccs_acl_info head;        /* type = CCS_TYPE_ENV_ACL  */
+	const struct ccs_path_info *env; /* environment variable */
+};
+
+/* Structure for "capability" directive. */
+struct ccs_capability_acl {
+	struct ccs_acl_info head; /* type = CCS_TYPE_CAPABILITY_ACL */
+	u8 operation; /* One of values in "enum ccs_capability_acl_index". */
+};
+
+/* Structure for "ipc signal" directive. */
+struct ccs_signal_acl {
+	struct ccs_acl_info head; /* type = CCS_TYPE_SIGNAL_ACL */
+	struct ccs_number_union sig;
+	/* Pointer to destination pattern. */
+	const struct ccs_path_info *domainname;
+};
+
+/* Structure for "network inet" directive. */
+struct ccs_inet_acl {
+	struct ccs_acl_info head; /* type = CCS_TYPE_INET_ACL */
+	u8 protocol;
+	struct ccs_ipaddr_union address;
+	struct ccs_number_union port;
+};
+
+/* Structure for "network unix" directive. */
+struct ccs_unix_acl {
+	struct ccs_acl_info head; /* type = CCS_TYPE_UNIX_ACL */
+	u8 protocol;
+	struct ccs_name_union name;
+};
+
+/* Structure for holding string data. */
+struct ccs_name {
+	struct ccs_shared_acl_head head;
+	int size; /* Memory size allocated for this entry. */
+	struct ccs_path_info entry;
+};
+
+/* Structure for holding a line from /proc/ccs/ interface. */
+struct ccs_acl_param {
+	char *data; /* Unprocessed data. */
+	struct list_head *list; /* List to add or remove. */
+	struct ccs_policy_namespace *ns; /* Namespace to use. */
+	bool is_delete; /* True if it is a delete request. */
+	union ccs_acl_union {
+		struct ccs_acl_info acl_info;
+		struct ccs_handler_acl handler_acl;
+		struct ccs_task_acl task_acl;
+		struct ccs_path_acl path_acl;
+		struct ccs_path2_acl path2_acl;
+		struct ccs_path_number_acl path_number_acl;
+		struct ccs_mkdev_acl mkdev_acl;
+		struct ccs_mount_acl mount_acl;
+		struct ccs_env_acl env_acl;
+		struct ccs_capability_acl capability_acl;
+		struct ccs_signal_acl signal_acl;
+		struct ccs_inet_acl inet_acl;
+		struct ccs_unix_acl unix_acl;
+		/**/
+		struct ccs_acl_head acl_head;
+		struct ccs_transition_control transition_control;
+		struct ccs_aggregator aggregator;
+		struct ccs_reserved reserved;
+		struct ccs_manager manager;
+		struct ccs_path_group path_group;
+		struct ccs_number_group number_group;
+		struct ccs_address_group address_group;
+	} e;
+};
+
+/* Structure for reading/writing policy via /proc/ccs/ interfaces. */
+struct ccs_io_buffer {
+	/* Exclusive lock for this structure.   */
+	struct mutex io_sem;
+	char __user *read_user_buf;
+	size_t read_user_buf_avail;
+	struct {
+		struct list_head *ns;
+		struct list_head *domain;
+		struct list_head *group;
+		struct list_head *acl;
+		size_t avail;
+		unsigned int step;
+		unsigned int query_index;
+		u16 index;
+		u16 cond_index;
+		u8 acl_group_index;
+		u8 cond_step;
+		u8 bit;
+		u8 w_pos;
+		bool eof;
+		bool print_this_domain_only;
+		bool print_transition_related_only;
+		bool print_cond_part;
+		const char *w[CCS_MAX_IO_READ_QUEUE];
+	} r;
+	struct {
+		struct ccs_policy_namespace *ns;
+		struct ccs_domain_info *domain;
+		size_t avail;
+		bool is_delete;
+	} w;
+	/* Buffer for reading.                  */
+	char *read_buf;
+	/* Size of read buffer.                 */
+	size_t readbuf_size;
+	/* Buffer for writing.                  */
+	char *write_buf;
+	/* Size of write buffer.                */
+	size_t writebuf_size;
+	/* Type of interface. */
+	enum ccs_proc_interface_index type;
+	/* Users counter protected by ccs_io_buffer_list_lock. */
+	u8 users;
+	/* List for telling GC not to kfree() elements. */
+	struct list_head list;
+};
+
+/* Structure for /proc/ccs/profile interface. */
+struct ccs_profile {
+	const struct ccs_path_info *comment;
+	u8 default_config;
+	u8 config[CCS_MAX_MAC_INDEX + CCS_MAX_MAC_CATEGORY_INDEX];
+	unsigned int pref[CCS_MAX_PREF];
+};
+
+/* Structure for representing YYYY/MM/DD hh/mm/ss. */
+struct ccs_time {
+	u16 year;
+	u8 month;
+	u8 day;
+	u8 hour;
+	u8 min;
+	u8 sec;
+};
+
+/* Structure for policy namespace. */
+struct ccs_policy_namespace {
+	/* Profile table. Memory is allocated as needed. */
+	struct ccs_profile *profile_ptr[CCS_MAX_PROFILES];
+	/* List of "struct ccs_group". */
+	struct list_head group_list[CCS_MAX_GROUP];
+	/* List of policy. */
+	struct list_head policy_list[CCS_MAX_POLICY];
+	/* The global ACL referred by "use_group" keyword. */
+	struct list_head acl_group[CCS_MAX_ACL_GROUPS];
+	/* List for connecting to ccs_namespace_list list. */
+	struct list_head namespace_list;
+	/* Profile version. Currently only 20150505 is supported. */
+	unsigned int profile_version;
+	/* Name of this namespace (e.g. "<kernel>", "</usr/sbin/httpd>" ). */
+	const char *name;
+};
+
+/* Prototype definition for "struct ccsecurity_operations". */
+
+void __init ccs_permission_init(void);
+void __init ccs_mm_init(void);
+
+/* Prototype definition for internal use. */
+
+bool ccs_dump_page(struct linux_binprm *bprm, unsigned long pos,
+		   struct ccs_page_dump *dump);
+bool ccs_memory_ok(const void *ptr, const unsigned int size);
+char *ccs_encode(const char *str);
+char *ccs_encode2(const char *str, int str_len);
+char *ccs_realpath(const struct path *path);
+const char *ccs_get_exe(void);
+const struct ccs_path_info *ccs_get_name(const char *name);
+int ccs_audit_log(struct ccs_request_info *r);
+int ccs_check_acl(struct ccs_request_info *r);
+int ccs_init_request_info(struct ccs_request_info *r, const u8 index);
+struct ccs_domain_info *ccs_assign_domain(const char *domainname,
+					  const bool transit);
+u8 ccs_get_config(const u8 profile, const u8 index);
+void *ccs_commit_ok(void *data, const unsigned int size);
+void ccs_del_acl(struct list_head *element);
+void ccs_del_condition(struct list_head *element);
+void ccs_fill_path_info(struct ccs_path_info *ptr);
+void ccs_get_attributes(struct ccs_obj_info *obj);
+void ccs_notify_gc(struct ccs_io_buffer *head, const bool is_register);
+void ccs_transition_failed(const char *domainname);
+void ccs_warn_oom(const char *function);
+void ccs_write_log(struct ccs_request_info *r, const char *fmt, ...)
+	__printf(2, 3);
+
+/* Variable definition for internal use. */
+
+extern bool ccs_policy_loaded;
+extern const char * const ccs_dif[CCS_MAX_DOMAIN_INFO_FLAGS];
+extern const u8 ccs_c2mac[CCS_MAX_CAPABILITY_INDEX];
+extern const u8 ccs_pn2mac[CCS_MAX_PATH_NUMBER_OPERATION];
+extern const u8 ccs_pnnn2mac[CCS_MAX_MKDEV_OPERATION];
+extern const u8 ccs_pp2mac[CCS_MAX_PATH2_OPERATION];
+extern struct ccs_domain_info ccs_kernel_domain;
+extern struct list_head ccs_condition_list;
+extern struct list_head ccs_domain_list;
+extern struct list_head ccs_name_list[CCS_MAX_HASH];
+extern struct list_head ccs_namespace_list;
+extern struct mutex ccs_policy_lock;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 19)
+extern struct srcu_struct ccs_ss;
+#endif
+extern unsigned int ccs_memory_quota[CCS_MAX_MEMORY_STAT];
+extern unsigned int ccs_memory_used[CCS_MAX_MEMORY_STAT];
+
+/* Inlined functions for internal use. */
+
+/**
+ * ccs_pathcmp - strcmp() for "struct ccs_path_info" structure.
+ *
+ * @a: Pointer to "struct ccs_path_info".
+ * @b: Pointer to "struct ccs_path_info".
+ *
+ * Returns true if @a != @b, false otherwise.
+ */
+static inline bool ccs_pathcmp(const struct ccs_path_info *a,
+			       const struct ccs_path_info *b)
+{
+	return a->hash != b->hash || strcmp(a->name, b->name);
+}
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 19)
+
+/**
+ * ccs_read_lock - Take lock for protecting policy.
+ *
+ * Returns index number for ccs_read_unlock().
+ */
+static inline int ccs_read_lock(void)
+{
+	return srcu_read_lock(&ccs_ss);
+}
+
+/**
+ * ccs_read_unlock - Release lock for protecting policy.
+ *
+ * @idx: Index number returned by ccs_read_lock().
+ *
+ * Returns nothing.
+ */
+static inline void ccs_read_unlock(const int idx)
+{
+	srcu_read_unlock(&ccs_ss, idx);
+}
+
+#else
+
+int ccs_lock(void);
+void ccs_unlock(const int idx);
+
+/**
+ * ccs_read_lock - Take lock for protecting policy.
+ *
+ * Returns index number for ccs_read_unlock().
+ */
+static inline int ccs_read_lock(void)
+{
+	return ccs_lock();
+}
+
+/**
+ * ccs_read_unlock - Release lock for protecting policy.
+ *
+ * @idx: Index number returned by ccs_read_lock().
+ *
+ * Returns nothing.
+ */
+static inline void ccs_read_unlock(const int idx)
+{
+	ccs_unlock(idx);
+}
+
+#endif
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 18)
+
+/**
+ * ccs_tasklist_lock - Take lock for reading list of "struct task_struct".
+ *
+ * Returns nothing.
+ */
+static inline void ccs_tasklist_lock(void)
+{
+	rcu_read_lock();
+}
+
+/**
+ * ccs_tasklist_unlock - Release lock for reading list of "struct task_struct".
+ *
+ * Returns nothing.
+ */
+static inline void ccs_tasklist_unlock(void)
+{
+	rcu_read_unlock();
+}
+
+#else
+
+/**
+ * ccs_tasklist_lock - Take lock for reading list of "struct task_struct".
+ *
+ * Returns nothing.
+ */
+static inline void ccs_tasklist_lock(void)
+{
+	read_lock(&tasklist_lock);
+}
+
+/**
+ * ccs_tasklist_unlock - Release lock for reading list of "struct task_struct".
+ *
+ * Returns nothing.
+ */
+static inline void ccs_tasklist_unlock(void)
+{
+	read_unlock(&tasklist_lock);
+}
+
+#endif
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 24)
+
+/**
+ * ccs_sys_getppid - Copy of getppid().
+ *
+ * Returns parent process's PID.
+ *
+ * Alpha does not have getppid() defined. To be able to build this module on
+ * Alpha, I have to copy getppid() from kernel/timer.c.
+ */
+static inline pid_t ccs_sys_getppid(void)
+{
+	pid_t pid;
+	rcu_read_lock();
+	pid = task_tgid_vnr(rcu_dereference(current->real_parent));
+	rcu_read_unlock();
+	return pid;
+}
+
+#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 0)
+
+/**
+ * ccs_sys_getppid - Copy of getppid().
+ *
+ * Returns parent process's PID.
+ *
+ * This function was rewritten to use RCU in 2.6.16.34. However, distributors
+ * which use earlier kernels (e.g. 2.6.8/2.6.9) did not backport the bugfix.
+ * Therefore, I'm using code for 2.6.16.34 for earlier kernels.
+ */
+static inline pid_t ccs_sys_getppid(void)
+{
+	pid_t pid;
+	rcu_read_lock();
+#if (defined(RHEL_MAJOR) && RHEL_MAJOR == 5) || (defined(AX_MAJOR) && AX_MAJOR == 3)
+	pid = rcu_dereference(current->parent)->tgid;
+#elif defined(CONFIG_UTRACE)
+	/*
+	 * RHEL 5.0 kernel does not have RHEL_MAJOR/RHEL_MINOR defined.
+	 * Assume RHEL 5.0 if CONFIG_UTRACE is defined.
+	 */
+	pid = rcu_dereference(current->parent)->tgid;
+#else
+	pid = rcu_dereference(current->real_parent)->tgid;
+#endif
+	rcu_read_unlock();
+	return pid;
+}
+
+#else
+
+/**
+ * ccs_sys_getppid - Copy of getppid().
+ *
+ * Returns parent process's PID.
+ *
+ * I can't use code for 2.6.16.34 for 2.4 kernels because 2.4 kernels does not
+ * have RCU. Therefore, I'm using pessimistic lock (i.e. tasklist_lock
+ * spinlock).
+ */
+static inline pid_t ccs_sys_getppid(void)
+{
+	pid_t pid;
+	read_lock(&tasklist_lock);
+#ifdef TASK_DEAD
+	pid = current->group_leader->real_parent->tgid;
+#else
+	pid = current->p_opptr->pid;
+#endif
+	read_unlock(&tasklist_lock);
+	return pid;
+}
+
+#endif
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 24)
+
+/**
+ * ccs_sys_getpid - Copy of getpid().
+ *
+ * Returns current thread's PID.
+ *
+ * Alpha does not have getpid() defined. To be able to build this module on
+ * Alpha, I have to copy getpid() from kernel/timer.c.
+ */
+static inline pid_t ccs_sys_getpid(void)
+{
+	return task_tgid_vnr(current);
+}
+
+#else
+
+/**
+ * ccs_sys_getpid - Copy of getpid().
+ *
+ * Returns current thread's PID.
+ */
+static inline pid_t ccs_sys_getpid(void)
+{
+	return current->tgid;
+}
+
+#endif
+
+/**
+ * ccs_get_mode - Get mode for specified functionality.
+ *
+ * @profile: Profile number.
+ * @index:   Functionality number.
+ *
+ * Returns mode.
+ */
+static inline u8 ccs_get_mode(const u8 profile, const u8 index)
+{
+	return ccs_get_config(profile, index) & (CCS_CONFIG_MAX_MODE - 1);
+}
+
+#if defined(CONFIG_SLOB)
+
+/**
+ * ccs_round2 - Round up to power of 2 for calculating memory usage.
+ *
+ * @size: Size to be rounded up.
+ *
+ * Returns @size.
+ *
+ * Since SLOB does not round up, this function simply returns @size.
+ */
+static inline int ccs_round2(size_t size)
+{
+	return size;
+}
+
+#else
+
+/**
+ * ccs_round2 - Round up to power of 2 for calculating memory usage.
+ *
+ * @size: Size to be rounded up.
+ *
+ * Returns rounded size.
+ *
+ * Strictly speaking, SLAB may be able to allocate (e.g.) 96 bytes instead of
+ * (e.g.) 128 bytes.
+ */
+static inline int ccs_round2(size_t size)
+{
+#if PAGE_SIZE == 4096
+	size_t bsize = 32;
+#else
+	size_t bsize = 64;
+#endif
+	if (!size)
+		return 0;
+	while (size > bsize)
+		bsize <<= 1;
+	return bsize;
+}
+
+#endif
+
+/**
+ * ccs_put_condition - Drop reference on "struct ccs_condition".
+ *
+ * @cond: Pointer to "struct ccs_condition". Maybe NULL.
+ *
+ * Returns nothing.
+ */
+static inline void ccs_put_condition(struct ccs_condition *cond)
+{
+	if (cond)
+		atomic_dec(&cond->head.users);
+}
+
+/**
+ * ccs_put_group - Drop reference on "struct ccs_group".
+ *
+ * @group: Pointer to "struct ccs_group". Maybe NULL.
+ *
+ * Returns nothing.
+ */
+static inline void ccs_put_group(struct ccs_group *group)
+{
+	if (group)
+		atomic_dec(&group->head.users);
+}
+
+/**
+ * ccs_put_name - Drop reference on "struct ccs_name".
+ *
+ * @name: Pointer to "struct ccs_path_info". Maybe NULL.
+ *
+ * Returns nothing.
+ */
+static inline void ccs_put_name(const struct ccs_path_info *name)
+{
+	if (name)
+		atomic_dec(&container_of(name, struct ccs_name, entry)->
+			   head.users);
+}
+
+/* For importing variables and functions. */
+extern const struct ccsecurity_exports ccsecurity_exports;
+
+#ifdef CONFIG_CCSECURITY_USE_EXTERNAL_TASK_SECURITY
+
+/*
+ * Structure for holding "struct ccs_domain_info *" and "struct ccs_execve *"
+ * and "u32 ccs_flags" for each "struct task_struct".
+ *
+ * "struct ccs_domain_info *" and "u32 ccs_flags" for each "struct task_struct"
+ * are maintained outside that "struct task_struct". Therefore, ccs_security
+ * != task_struct . This keeps KABI for distributor's prebuilt kernels but
+ * entails slow access.
+ *
+ * Memory for this structure is allocated when current thread tries to access
+ * it. Therefore, if memory allocation failed, current thread will be killed by
+ * SIGKILL. Note that if current->pid == 1, sending SIGKILL won't work.
+ */
+struct ccs_security {
+	struct list_head list;
+	const struct task_struct *task;
+	struct ccs_domain_info *ccs_domain_info;
+	u32 ccs_flags;
+	struct rcu_head rcu;
+};
+
+#define CCS_TASK_SECURITY_HASH_BITS 12
+#define CCS_MAX_TASK_SECURITY_HASH (1u << CCS_TASK_SECURITY_HASH_BITS)
+extern struct list_head ccs_task_security_list[CCS_MAX_TASK_SECURITY_HASH];
+
+struct ccs_security *ccs_find_task_security(const struct task_struct *task);
+
+/**
+ * ccs_current_security - Get "struct ccs_security" for current thread.
+ *
+ * Returns pointer to "struct ccs_security" for current thread.
+ */
+static inline struct ccs_security *ccs_current_security(void)
+{
+	return ccs_find_task_security(current);
+}
+
+/**
+ * ccs_task_domain - Get "struct ccs_domain_info" for specified thread.
+ *
+ * @task: Pointer to "struct task_struct".
+ *
+ * Returns pointer to "struct ccs_security" for specified thread.
+ */
+static inline struct ccs_domain_info *ccs_task_domain(struct task_struct *task)
+{
+	struct ccs_domain_info *domain;
+	rcu_read_lock();
+	domain = ccs_find_task_security(task)->ccs_domain_info;
+	rcu_read_unlock();
+	return domain;
+}
+
+/**
+ * ccs_current_domain - Get "struct ccs_domain_info" for current thread.
+ *
+ * Returns pointer to "struct ccs_domain_info" for current thread.
+ */
+static inline struct ccs_domain_info *ccs_current_domain(void)
+{
+	return ccs_find_task_security(current)->ccs_domain_info;
+}
+
+/**
+ * ccs_task_flags - Get flags for specified thread.
+ *
+ * @task: Pointer to "struct task_struct".
+ *
+ * Returns flags for specified thread.
+ */
+static inline u32 ccs_task_flags(struct task_struct *task)
+{
+	u32 ccs_flags;
+	rcu_read_lock();
+	ccs_flags = ccs_find_task_security(task)->ccs_flags;
+	rcu_read_unlock();
+	return ccs_flags;
+}
+
+/**
+ * ccs_current_flags - Get flags for current thread.
+ *
+ * Returns flags for current thread.
+ */
+static inline u32 ccs_current_flags(void)
+{
+	return ccs_find_task_security(current)->ccs_flags;
+}
+
+#else
+
+/*
+ * "struct ccs_domain_info *" and "u32 ccs_flags" for each "struct task_struct"
+ * are maintained inside that "struct task_struct". Therefore, ccs_security ==
+ * task_struct . This allows fast access but breaks KABI checks for
+ * distributor's prebuilt kernels due to changes in "struct task_struct".
+ */
+#define ccs_security task_struct
+
+/**
+ * ccs_find_task_security - Find "struct ccs_security" for given task.
+ *
+ * @task: Pointer to "struct task_struct".
+ *
+ * Returns pointer to "struct ccs_security".
+ */
+static inline struct ccs_security *ccs_find_task_security(struct task_struct *
+							  task)
+{
+	return task;
+}
+
+/**
+ * ccs_current_security - Get "struct ccs_security" for current thread.
+ *
+ * Returns pointer to "struct ccs_security" for current thread.
+ */
+static inline struct ccs_security *ccs_current_security(void)
+{
+	return ccs_find_task_security(current);
+}
+
+/**
+ * ccs_task_domain - Get "struct ccs_domain_info" for specified thread.
+ *
+ * @task: Pointer to "struct task_struct".
+ *
+ * Returns pointer to "struct ccs_security" for specified thread.
+ */
+static inline struct ccs_domain_info *ccs_task_domain(struct task_struct *task)
+{
+	struct ccs_domain_info *domain = task->ccs_domain_info;
+	return domain ? domain : &ccs_kernel_domain;
+}
+
+/**
+ * ccs_current_domain - Get "struct ccs_domain_info" for current thread.
+ *
+ * Returns pointer to "struct ccs_domain_info" for current thread.
+ *
+ * If current thread does not belong to a domain (which is true for initial
+ * init_task in order to hide ccs_kernel_domain from this module),
+ * current thread enters into ccs_kernel_domain.
+ */
+static inline struct ccs_domain_info *ccs_current_domain(void)
+{
+	struct task_struct *task = current;
+	if (!task->ccs_domain_info)
+		task->ccs_domain_info = &ccs_kernel_domain;
+	return task->ccs_domain_info;
+}
+
+/**
+ * ccs_task_flags - Get flags for specified thread.
+ *
+ * @task: Pointer to "struct task_struct".
+ *
+ * Returns flags for specified thread.
+ */
+static inline u32 ccs_task_flags(struct task_struct *task)
+{
+	return ccs_find_task_security(task)->ccs_flags;
+}
+
+/**
+ * ccs_current_flags - Get flags for current thread.
+ *
+ * Returns flags for current thread.
+ */
+static inline u32 ccs_current_flags(void)
+{
+	return ccs_find_task_security(current)->ccs_flags;
+}
+
+#endif
+
+/**
+ * ccs_current_namespace - Get "struct ccs_policy_namespace" for current thread.
+ *
+ * Returns pointer to "struct ccs_policy_namespace" for current thread.
+ */
+static inline struct ccs_policy_namespace *ccs_current_namespace(void)
+{
+	return ccs_current_domain()->ns;
+}
+
+#endif
diff --git a/security/ccsecurity/load_policy.c b/security/ccsecurity/load_policy.c
new file mode 100644
index 0000000..fc4ae30
--- /dev/null
+++ b/security/ccsecurity/load_policy.c
@@ -0,0 +1,352 @@
+/*
+ * security/ccsecurity/load_policy.c
+ *
+ * Copyright (C) 2005-2012  NTT DATA CORPORATION
+ *
+ * Version: 1.8.4   2015/05/05
+ */
+
+#include <linux/version.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/binfmts.h>
+#include <linux/sched.h>
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0)
+#include <linux/kmod.h>
+/*
+ * Regarding 2.4 kernels, we need to define __KERNEL_SYSCALLS__ in order to use
+ * waitpid() because call_usermodehelper() does not support UMH_WAIT_PROC.
+ */
+#define __KERNEL_SYSCALLS__
+#include <linux/unistd.h>
+#else
+#include <linux/fs.h>
+#include <linux/namei.h>
+#endif
+#ifndef LOOKUP_POSITIVE
+#define LOOKUP_POSITIVE 0
+#endif
+
+/*
+ * TOMOYO specific part start.
+ */
+
+#include <linux/ccsecurity.h>
+
+/**
+ * ccs_setup - Set enable/disable upon boot.
+ *
+ * @str: "off" to disable, "on" to enable.
+ *
+ * Returns 0.
+ */
+static int __init ccs_setup(char *str)
+{
+	if (!strcmp(str, "off"))
+		ccsecurity_ops.disabled = 1;
+	else if (!strcmp(str, "on"))
+		ccsecurity_ops.disabled = 0;
+	return 0;
+}
+
+__setup("ccsecurity=", ccs_setup);
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 0, 0)
+#include "lsm2ccsecurity.c"
+#endif
+
+#ifndef CONFIG_CCSECURITY_OMIT_USERSPACE_LOADER
+
+/* Path to the policy loader. (default = CONFIG_CCSECURITY_POLICY_LOADER) */
+static const char *ccs_loader;
+
+/**
+ * ccs_loader_setup - Set policy loader.
+ *
+ * @str: Program to use as a policy loader (e.g. /sbin/ccs-init ).
+ *
+ * Returns 0.
+ */
+static int __init ccs_loader_setup(char *str)
+{
+	ccs_loader = str;
+	return 0;
+}
+
+__setup("CCS_loader=", ccs_loader_setup);
+
+/**
+ * ccs_policy_loader_exists - Check whether /sbin/ccs-init exists.
+ *
+ * Returns true if /sbin/ccs-init exists, false otherwise.
+ */
+static _Bool ccs_policy_loader_exists(void)
+{
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 28)
+	struct path path;
+	if (!ccs_loader)
+		ccs_loader = CONFIG_CCSECURITY_POLICY_LOADER;
+	if (kern_path(ccs_loader, LOOKUP_FOLLOW | LOOKUP_POSITIVE,
+		      &path) == 0) {
+		path_put(&path);
+		return 1;
+	}
+#else
+	struct nameidata nd;
+	if (!ccs_loader)
+		ccs_loader = CONFIG_CCSECURITY_POLICY_LOADER;
+	if (path_lookup(ccs_loader, LOOKUP_FOLLOW | LOOKUP_POSITIVE,
+			&nd) == 0) {
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25)
+		path_put(&nd.path);
+#else
+		path_release(&nd);
+#endif
+		return 1;
+	}
+#endif
+	printk(KERN_INFO "Not activating Mandatory Access Control "
+	       "as %s does not exist.\n", ccs_loader);
+	return 0;
+}
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0)
+
+/**
+ * ccs_run_loader - Start /sbin/ccs-init.
+ *
+ * @unused: Not used.
+ *
+ * Returns PID of /sbin/ccs-init on success, negative value otherwise.
+ */
+static int ccs_run_loader(void *unused)
+{
+	char *argv[2];
+	char *envp[3];
+	printk(KERN_INFO "Calling %s to load policy. Please wait.\n",
+	       ccs_loader);
+	argv[0] = (char *) ccs_loader;
+	argv[1] = NULL;
+	envp[0] = "HOME=/";
+	envp[1] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin";
+	envp[2] = NULL;
+	return exec_usermodehelper(argv[0], argv, envp);
+}
+
+#endif
+
+/* Path to the trigger. (default = CONFIG_CCSECURITY_ACTIVATION_TRIGGER) */
+static const char *ccs_trigger;
+
+/**
+ * ccs_trigger_setup - Set trigger for activation.
+ *
+ * @str: Program to use as an activation trigger (e.g. /sbin/init ).
+ *
+ * Returns 0.
+ */
+static int __init ccs_trigger_setup(char *str)
+{
+	ccs_trigger = str;
+	return 0;
+}
+
+__setup("CCS_trigger=", ccs_trigger_setup);
+
+/**
+ * ccs_load_policy - Run external policy loader to load policy.
+ *
+ * @filename: The program about to start.
+ *
+ * Returns nothing.
+ *
+ * This function checks whether @filename is /sbin/init, and if so
+ * invoke /sbin/ccs-init and wait for the termination of /sbin/ccs-init
+ * and then continues invocation of /sbin/init.
+ * /sbin/ccs-init reads policy files in /etc/ccs/ directory and
+ * writes to /proc/ccs/ interfaces.
+ */
+static void ccs_load_policy(const char *filename)
+{
+	static _Bool done;
+	if (ccsecurity_ops.disabled || done)
+		return;
+	if (!ccs_trigger)
+		ccs_trigger = CONFIG_CCSECURITY_ACTIVATION_TRIGGER;
+	if (strcmp(filename, ccs_trigger))
+		return;
+	if (!ccs_policy_loader_exists())
+		return;
+	done = 1;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 0)
+	{
+		char *argv[2];
+		char *envp[3];
+		printk(KERN_INFO "Calling %s to load policy. Please wait.\n",
+		       ccs_loader);
+		argv[0] = (char *) ccs_loader;
+		argv[1] = NULL;
+		envp[0] = "HOME=/";
+		envp[1] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin";
+		envp[2] = NULL;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 23) || defined(UMH_WAIT_PROC)
+		call_usermodehelper(argv[0], argv, envp, UMH_WAIT_PROC);
+#else
+		call_usermodehelper(argv[0], argv, envp, 1);
+#endif
+	}
+#elif defined(TASK_DEAD)
+	{
+		/* Copied from kernel/kmod.c */
+		struct task_struct *task = current;
+		pid_t pid = kernel_thread(ccs_run_loader, NULL, 0);
+		sigset_t tmpsig;
+		spin_lock_irq(&task->sighand->siglock);
+		tmpsig = task->blocked;
+		siginitsetinv(&task->blocked,
+			      sigmask(SIGKILL) | sigmask(SIGSTOP));
+		recalc_sigpending();
+		spin_unlock_irq(&task->sighand->siglock);
+		if (pid >= 0)
+			waitpid(pid, NULL, __WCLONE);
+		spin_lock_irq(&task->sighand->siglock);
+		task->blocked = tmpsig;
+		recalc_sigpending();
+		spin_unlock_irq(&task->sighand->siglock);
+	}
+#else
+	{
+		/* Copied from kernel/kmod.c */
+		struct task_struct *task = current;
+		pid_t pid = kernel_thread(ccs_run_loader, NULL, 0);
+		sigset_t tmpsig;
+		spin_lock_irq(&task->sigmask_lock);
+		tmpsig = task->blocked;
+		siginitsetinv(&task->blocked,
+			      sigmask(SIGKILL) | sigmask(SIGSTOP));
+		recalc_sigpending(task);
+		spin_unlock_irq(&task->sigmask_lock);
+		if (pid >= 0)
+			waitpid(pid, NULL, __WCLONE);
+		spin_lock_irq(&task->sigmask_lock);
+		task->blocked = tmpsig;
+		recalc_sigpending(task);
+		spin_unlock_irq(&task->sigmask_lock);
+	}
+#endif
+	if (ccsecurity_ops.check_profile)
+		ccsecurity_ops.check_profile();
+	else
+		panic("Failed to load policy.");
+}
+
+#endif
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 8, 0)
+
+/**
+ * __ccs_search_binary_handler - Load policy before calling search_binary_handler().
+ *
+ * @bprm: Pointer to "struct linux_binprm".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int __ccs_search_binary_handler(struct linux_binprm *bprm)
+{
+#ifndef CONFIG_CCSECURITY_OMIT_USERSPACE_LOADER
+	ccs_load_policy(bprm->filename);
+#endif
+	/*
+	 * ccs_load_policy() executes /sbin/ccs-init if bprm->filename is
+	 * /sbin/init. /sbin/ccs-init executes /etc/ccs/ccs-load-module to
+	 * load loadable kernel module. The loadable kernel module modifies
+	 * "struct ccsecurity_ops". Thus, we need to transfer control to
+	 * __ccs_search_binary_handler() in security/ccsecurity/permission.c
+	 * if "struct ccsecurity_ops" was modified.
+	 */
+	if (ccsecurity_ops.search_binary_handler
+	    != __ccs_search_binary_handler)
+		return ccsecurity_ops.search_binary_handler(bprm);
+	return search_binary_handler(bprm);
+}
+
+#else
+
+/**
+ * __ccs_search_binary_handler - Load policy before calling search_binary_handler().
+ *
+ * @bprm: Pointer to "struct linux_binprm".
+ * @regs: Pointer to "struct pt_regs".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int __ccs_search_binary_handler(struct linux_binprm *bprm,
+				       struct pt_regs *regs)
+{
+#ifndef CONFIG_CCSECURITY_OMIT_USERSPACE_LOADER
+	ccs_load_policy(bprm->filename);
+#endif
+	/*
+	 * ccs_load_policy() executes /sbin/ccs-init if bprm->filename is
+	 * /sbin/init. /sbin/ccs-init executes /etc/ccs/ccs-load-module to
+	 * load loadable kernel module. The loadable kernel module modifies
+	 * "struct ccsecurity_ops". Thus, we need to transfer control to
+	 * __ccs_search_binary_handler() in security/ccsecurity/permission.c
+	 * if "struct ccsecurity_ops" was modified.
+	 */
+	if (ccsecurity_ops.search_binary_handler
+	    != __ccs_search_binary_handler)
+		return ccsecurity_ops.search_binary_handler(bprm, regs);
+	return search_binary_handler(bprm, regs);
+}
+
+#endif
+
+/*
+ * Some exports for loadable kernel module part.
+ *
+ * Although scripts/checkpatch.pl complains about use of "extern" in C file,
+ * we don't put these into security/ccsecurity/internal.h because we want to
+ * split built-in part and loadable kernel module part.
+ */
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 0) && LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 35)
+extern spinlock_t vfsmount_lock;
+#endif
+
+/* For exporting variables and functions. */
+const struct ccsecurity_exports ccsecurity_exports = {
+#ifndef CONFIG_CCSECURITY_OMIT_USERSPACE_LOADER
+	.load_policy = ccs_load_policy,
+#endif
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 2, 0) && defined(CONFIG_SECURITY)
+	.add_hooks = ccs_add_hooks,
+#endif
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 2, 0)
+	.d_absolute_path = d_absolute_path,
+#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 36)
+	.__d_path = __d_path,
+#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 0)
+	.vfsmount_lock = &vfsmount_lock,
+#endif
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 24)
+	.find_task_by_vpid = find_task_by_vpid,
+	.find_task_by_pid_ns = find_task_by_pid_ns,
+#endif
+};
+#ifdef CONFIG_CCSECURITY_LKM
+/* Only ccsecurity module need to access this struct. */
+EXPORT_SYMBOL_GPL(ccsecurity_exports);
+#endif
+
+/* Members are updated by loadable kernel module. */
+struct ccsecurity_operations ccsecurity_ops = {
+	.search_binary_handler = __ccs_search_binary_handler,
+#ifdef CONFIG_CCSECURITY_DISABLE_BY_DEFAULT
+	.disabled = 1,
+#endif
+};
+/*
+ * Non-GPL modules might need to access this struct via inlined functions
+ * embedded into include/linux/security.h and include/net/ip.h
+ */
+EXPORT_SYMBOL(ccsecurity_ops);
diff --git a/security/ccsecurity/lsm2ccsecurity.c b/security/ccsecurity/lsm2ccsecurity.c
new file mode 100644
index 0000000..b81d8ed
--- /dev/null
+++ b/security/ccsecurity/lsm2ccsecurity.c
@@ -0,0 +1,192 @@
+/*
+ * security/ccsecurity/lsm2ccsecurity.c
+ *
+ * Copyright (C) 2005-2012  NTT DATA CORPORATION
+ *
+ * Version: 1.8.4   2015/07/11
+ */
+
+#include <linux/path.h>
+#include <linux/security.h>
+#include <linux/ccsecurity.h>
+
+int ccs_settime(const struct timespec *ts, const struct timezone *tz)
+{
+        return ccs_capable(CCS_SYS_SETTIME) ? 0 : -EPERM;
+}
+
+int ccs_sb_mount(const char *dev_name, struct path *path, const char *type,
+		 unsigned long flags, void *data)
+{
+        return ccs_mount_permission(dev_name, path, type, flags, data);
+}
+
+int ccs_sb_umount(struct vfsmount *mnt, int flags)
+{
+        return ccs_umount_permission(mnt, flags);
+}
+
+int ccs_sb_pivotroot(struct path *old_path, struct path *new_path)
+{
+        return ccs_pivot_root_permission(old_path, new_path);
+}
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 1, 0)
+int ccs_inode_getattr(struct vfsmount *mnt, struct dentry *dentry)
+{
+        return ccs_getattr_permission(mnt, dentry);
+}
+#else
+int ccs_inode_getattr(const struct path *path)
+{
+        return ccs_getattr_permission(path->mnt, path->dentry);
+}
+#endif
+
+int ccs_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+        return ccs_ioctl_permission(file, cmd, arg);
+}
+
+int ccs_file_fcntl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+        return ccs_fcntl_permission(file, cmd, arg);
+}
+
+int ccs_file_open(struct file *file, const struct cred *cred)
+{
+        return ccs_open_permission(file);
+}
+
+int ccs_socket_create(int family, int type, int protocol, int kern)
+{
+        return ccs_socket_create_permission(family, type, protocol);
+}
+
+int ccs_socket_bind(struct socket *sock, struct sockaddr *address, int addrlen)
+{
+        return ccs_socket_bind_permission(sock, address, addrlen);
+}
+
+int ccs_socket_connect(struct socket *sock, struct sockaddr *address,
+		       int addrlen)
+{
+        return ccs_socket_connect_permission(sock, address, addrlen);
+}
+
+int ccs_socket_listen(struct socket *sock, int backlog)
+{
+        return ccs_socket_listen_permission(sock);
+}
+
+int ccs_socket_sendmsg(struct socket *sock, struct msghdr *msg, int size)
+{
+        return ccs_socket_sendmsg_permission(sock, msg, size);
+}
+
+int ccs_path_unlink(struct path *dir, struct dentry *dentry)
+{
+        return ccs_unlink_permission(dentry, dir->mnt);
+}
+
+int ccs_path_mkdir(struct path *dir, struct dentry *dentry, umode_t mode)
+{
+        return ccs_mkdir_permission(dentry, dir->mnt, mode);
+}
+
+int ccs_path_rmdir(struct path *dir, struct dentry *dentry)
+{
+        return ccs_rmdir_permission(dentry, dir->mnt);
+}
+
+int ccs_path_mknod(struct path *dir, struct dentry *dentry, umode_t mode,
+		   unsigned int dev)
+{
+        return ccs_mknod_permission(dentry, dir->mnt, mode, dev);
+}
+
+int ccs_path_truncate(struct path *path)
+{
+        return ccs_truncate_permission(path->dentry, path->mnt);
+}
+
+int ccs_path_symlink(struct path *dir, struct dentry *dentry,
+		     const char *old_name)
+{
+        return ccs_symlink_permission(dentry, dir->mnt, old_name);
+}
+
+int ccs_path_link(struct dentry *old_dentry, struct path *new_dir,
+		  struct dentry *new_dentry)
+{
+        return ccs_link_permission(old_dentry, new_dentry, new_dir->mnt);
+}
+
+int ccs_path_rename(struct path *old_dir, struct dentry *old_dentry,
+		    struct path *new_dir, struct dentry *new_dentry)
+{
+        return ccs_rename_permission(old_dentry, new_dentry, new_dir->mnt);
+}
+
+int ccs_path_chmod(struct path *path, umode_t mode)
+{
+        return ccs_chmod_permission(path->dentry, path->mnt, mode);
+}
+
+int ccs_path_chown(struct path *path, kuid_t uid, kgid_t gid)
+{
+        return ccs_chown_permission(path->dentry, path->mnt, uid, gid);
+}
+
+int ccs_path_chroot(struct path *path)
+{
+        return ccs_chroot_permission(path);
+}
+
+#if !defined(CONFIG_SECURITY_PATH)
+EXPORT_SYMBOL(ccs_path_mkdir);
+EXPORT_SYMBOL(ccs_path_mknod);
+EXPORT_SYMBOL(ccs_path_unlink);
+EXPORT_SYMBOL(ccs_path_rename);
+#endif
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 2, 0) && defined(CONFIG_SECURITY)
+
+#include <linux/lsm_hooks.h>
+
+static struct security_hook_list ccsecurity_hooks[] = {
+	LSM_HOOK_INIT(settime, ccs_settime),
+	LSM_HOOK_INIT(sb_mount, ccs_sb_mount),
+	LSM_HOOK_INIT(sb_umount, ccs_sb_umount),
+	LSM_HOOK_INIT(sb_pivotroot, ccs_sb_pivotroot),
+	LSM_HOOK_INIT(inode_getattr, ccs_inode_getattr),
+	LSM_HOOK_INIT(file_ioctl, ccs_file_ioctl),
+	LSM_HOOK_INIT(file_fcntl, ccs_file_fcntl),
+	LSM_HOOK_INIT(file_open, ccs_file_open),
+#if defined(CONFIG_SECURITY_NETWORK)
+	LSM_HOOK_INIT(socket_create, ccs_socket_create),
+	LSM_HOOK_INIT(socket_bind, ccs_socket_bind),
+	LSM_HOOK_INIT(socket_connect, ccs_socket_connect),
+	LSM_HOOK_INIT(socket_listen, ccs_socket_listen),
+	LSM_HOOK_INIT(socket_sendmsg, ccs_socket_sendmsg),
+#endif
+#if defined(CONFIG_SECURITY_PATH)
+	LSM_HOOK_INIT(path_unlink, ccs_path_unlink),
+	LSM_HOOK_INIT(path_mkdir, ccs_path_mkdir),
+	LSM_HOOK_INIT(path_rmdir, ccs_path_rmdir),
+	LSM_HOOK_INIT(path_mknod, ccs_path_mknod),
+	LSM_HOOK_INIT(path_truncate, ccs_path_truncate),
+	LSM_HOOK_INIT(path_symlink, ccs_path_symlink),
+	LSM_HOOK_INIT(path_link, ccs_path_link),
+	LSM_HOOK_INIT(path_rename, ccs_path_rename),
+	LSM_HOOK_INIT(path_chmod, ccs_path_chmod),
+	LSM_HOOK_INIT(path_chown, ccs_path_chown),
+	LSM_HOOK_INIT(path_chroot, ccs_path_chroot),
+#endif
+};
+
+static void ccs_add_hooks(void)
+{
+	security_add_hooks(ccsecurity_hooks, ARRAY_SIZE(ccsecurity_hooks));
+}
+#endif /* LINUX_VERSION_CODE >= KERNEL_VERSION(4, 2, 0) && defined(CONFIG_SECURITY) */
diff --git a/security/ccsecurity/memory.c b/security/ccsecurity/memory.c
new file mode 100644
index 0000000..6514a26
--- /dev/null
+++ b/security/ccsecurity/memory.c
@@ -0,0 +1,356 @@
+/*
+ * security/ccsecurity/memory.c
+ *
+ * Copyright (C) 2005-2012  NTT DATA CORPORATION
+ *
+ * Version: 1.8.4   2015/05/05
+ */
+
+#include "internal.h"
+
+/***** SECTION1: Constants definition *****/
+
+/***** SECTION2: Structure definition *****/
+
+/***** SECTION3: Prototype definition section *****/
+
+bool ccs_memory_ok(const void *ptr, const unsigned int size);
+const struct ccs_path_info *ccs_get_name(const char *name);
+#ifdef CONFIG_CCSECURITY_USE_EXTERNAL_TASK_SECURITY
+struct ccs_security *ccs_find_task_security(const struct task_struct *task);
+#endif
+void *ccs_commit_ok(void *data, const unsigned int size);
+void __init ccs_mm_init(void);
+void ccs_warn_oom(const char *function);
+
+#ifdef CONFIG_CCSECURITY_USE_EXTERNAL_TASK_SECURITY
+static int __ccs_alloc_task_security(const struct task_struct *task);
+static void __ccs_free_task_security(const struct task_struct *task);
+static void ccs_add_task_security(struct ccs_security *ptr,
+				  struct list_head *list);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 8)
+static void ccs_rcu_free(struct rcu_head *rcu);
+#else
+static void ccs_rcu_free(void *arg);
+#endif
+#endif
+
+/***** SECTION4: Standalone functions section *****/
+
+/***** SECTION5: Variables definition section *****/
+
+/* Memoy currently used by policy/audit log/query. */
+unsigned int ccs_memory_used[CCS_MAX_MEMORY_STAT];
+
+/* Memory quota for "policy"/"audit log"/"query". */
+unsigned int ccs_memory_quota[CCS_MAX_MEMORY_STAT];
+
+/* The list for "struct ccs_name". */
+struct list_head ccs_name_list[CCS_MAX_HASH];
+
+#ifdef CONFIG_CCSECURITY_USE_EXTERNAL_TASK_SECURITY
+
+/* Dummy security context for avoiding NULL pointer dereference. */
+static struct ccs_security ccs_oom_security = {
+	.ccs_domain_info = &ccs_kernel_domain
+};
+
+/* Dummy security context for avoiding NULL pointer dereference. */
+static struct ccs_security ccs_default_security = {
+	.ccs_domain_info = &ccs_kernel_domain
+};
+
+/* List of "struct ccs_security". */
+struct list_head ccs_task_security_list[CCS_MAX_TASK_SECURITY_HASH];
+/* Lock for protecting ccs_task_security_list[]. */
+static DEFINE_SPINLOCK(ccs_task_security_list_lock);
+
+#endif
+
+/***** SECTION6: Dependent functions section *****/
+
+/**
+ * ccs_warn_oom - Print out of memory warning message.
+ *
+ * @function: Function's name.
+ *
+ * Returns nothing.
+ */
+void ccs_warn_oom(const char *function)
+{
+	/* Reduce error messages. */
+	static pid_t ccs_last_pid;
+	const pid_t pid = current->pid;
+	if (ccs_last_pid != pid) {
+		printk(KERN_WARNING "ERROR: Out of memory at %s.\n",
+		       function);
+		ccs_last_pid = pid;
+	}
+	if (!ccs_policy_loaded)
+		panic("MAC Initialization failed.\n");
+}
+
+/**
+ * ccs_memory_ok - Check memory quota.
+ *
+ * @ptr:  Pointer to allocated memory. Maybe NULL.
+ * @size: Size in byte. Not used if @ptr is NULL.
+ *
+ * Returns true if @ptr is not NULL and quota not exceeded, false otherwise.
+ *
+ * Caller holds ccs_policy_lock mutex.
+ */
+bool ccs_memory_ok(const void *ptr, const unsigned int size)
+{
+	if (ptr) {
+		const size_t s = ccs_round2(size);
+		ccs_memory_used[CCS_MEMORY_POLICY] += s;
+		if (!ccs_memory_quota[CCS_MEMORY_POLICY] ||
+		    ccs_memory_used[CCS_MEMORY_POLICY] <=
+		    ccs_memory_quota[CCS_MEMORY_POLICY])
+			return true;
+		ccs_memory_used[CCS_MEMORY_POLICY] -= s;
+	}
+	ccs_warn_oom(__func__);
+	return false;
+}
+
+/**
+ * ccs_commit_ok - Allocate memory and check memory quota.
+ *
+ * @data: Data to copy from.
+ * @size: Size in byte.
+ *
+ * Returns pointer to allocated memory on success, NULL otherwise.
+ * @data is zero-cleared on success.
+ *
+ * Caller holds ccs_policy_lock mutex.
+ */
+void *ccs_commit_ok(void *data, const unsigned int size)
+{
+	void *ptr = kmalloc(size, CCS_GFP_FLAGS);
+	if (ccs_memory_ok(ptr, size)) {
+		memmove(ptr, data, size);
+		memset(data, 0, size);
+		return ptr;
+	}
+	kfree(ptr);
+	return NULL;
+}
+
+/**
+ * ccs_get_name - Allocate memory for string data.
+ *
+ * @name: The string to store into the permernent memory.
+ *
+ * Returns pointer to "struct ccs_path_info" on success, NULL otherwise.
+ */
+const struct ccs_path_info *ccs_get_name(const char *name)
+{
+	struct ccs_name *ptr;
+	unsigned int hash;
+	int len;
+	int allocated_len;
+	struct list_head *head;
+
+	if (!name)
+		return NULL;
+	len = strlen(name) + 1;
+	hash = full_name_hash((const unsigned char *) name, len - 1);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0) || defined(RHEL_MAJOR)
+	head = &ccs_name_list[hash_long(hash, CCS_HASH_BITS)];
+#else
+	head = &ccs_name_list[hash % CCS_MAX_HASH];
+#endif
+	if (mutex_lock_interruptible(&ccs_policy_lock))
+		return NULL;
+	list_for_each_entry(ptr, head, head.list) {
+		if (hash != ptr->entry.hash || strcmp(name, ptr->entry.name) ||
+		    atomic_read(&ptr->head.users) == CCS_GC_IN_PROGRESS)
+			continue;
+		atomic_inc(&ptr->head.users);
+		goto out;
+	}
+	allocated_len = sizeof(*ptr) + len;
+	ptr = kzalloc(allocated_len, CCS_GFP_FLAGS);
+	if (ccs_memory_ok(ptr, allocated_len)) {
+		ptr->entry.name = ((char *) ptr) + sizeof(*ptr);
+		memmove((char *) ptr->entry.name, name, len);
+		atomic_set(&ptr->head.users, 1);
+		ccs_fill_path_info(&ptr->entry);
+		ptr->size = allocated_len;
+		list_add_tail(&ptr->head.list, head);
+	} else {
+		kfree(ptr);
+		ptr = NULL;
+	}
+out:
+	mutex_unlock(&ccs_policy_lock);
+	return ptr ? &ptr->entry : NULL;
+}
+
+#ifdef CONFIG_CCSECURITY_USE_EXTERNAL_TASK_SECURITY
+
+/**
+ * ccs_add_task_security - Add "struct ccs_security" to list.
+ *
+ * @ptr:  Pointer to "struct ccs_security".
+ * @list: Pointer to "struct list_head".
+ *
+ * Returns nothing.
+ */
+static void ccs_add_task_security(struct ccs_security *ptr,
+				  struct list_head *list)
+{
+	unsigned long flags;
+	spin_lock_irqsave(&ccs_task_security_list_lock, flags);
+	list_add_rcu(&ptr->list, list);
+	spin_unlock_irqrestore(&ccs_task_security_list_lock, flags);
+}
+
+/**
+ * __ccs_alloc_task_security - Allocate memory for new tasks.
+ *
+ * @task: Pointer to "struct task_struct".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int __ccs_alloc_task_security(const struct task_struct *task)
+{
+	struct ccs_security *old_security = ccs_current_security();
+	struct ccs_security *new_security = kzalloc(sizeof(*new_security),
+						    GFP_KERNEL);
+	struct list_head *list = &ccs_task_security_list
+		[hash_ptr((void *) task, CCS_TASK_SECURITY_HASH_BITS)];
+	if (!new_security)
+		return -ENOMEM;
+	new_security->task = task;
+	new_security->ccs_domain_info = old_security->ccs_domain_info;
+	new_security->ccs_flags = old_security->ccs_flags;
+	ccs_add_task_security(new_security, list);
+	return 0;
+}
+
+/**
+ * ccs_find_task_security - Find "struct ccs_security" for given task.
+ *
+ * @task: Pointer to "struct task_struct".
+ *
+ * Returns pointer to "struct ccs_security" on success, &ccs_oom_security on
+ * out of memory, &ccs_default_security otherwise.
+ *
+ * If @task is current thread and "struct ccs_security" for current thread was
+ * not found, I try to allocate it. But if allocation failed, current thread
+ * will be killed by SIGKILL. Note that if current->pid == 1, sending SIGKILL
+ * won't work.
+ */
+struct ccs_security *ccs_find_task_security(const struct task_struct *task)
+{
+	struct ccs_security *ptr;
+	struct list_head *list = &ccs_task_security_list
+		[hash_ptr((void *) task, CCS_TASK_SECURITY_HASH_BITS)];
+	/* Make sure INIT_LIST_HEAD() in ccs_mm_init() takes effect. */
+	while (!list->next);
+	rcu_read_lock();
+	list_for_each_entry_rcu(ptr, list, list) {
+		if (ptr->task != task)
+			continue;
+		rcu_read_unlock();
+		return ptr;
+	}
+	rcu_read_unlock();
+	if (task != current)
+		return &ccs_default_security;
+	/* Use GFP_ATOMIC because caller may have called rcu_read_lock(). */
+	ptr = kzalloc(sizeof(*ptr), GFP_ATOMIC);
+	if (!ptr) {
+		printk(KERN_WARNING "Unable to allocate memory for pid=%u\n",
+		       task->pid);
+		send_sig(SIGKILL, current, 0);
+		return &ccs_oom_security;
+	}
+	*ptr = ccs_default_security;
+	ptr->task = task;
+	ccs_add_task_security(ptr, list);
+	return ptr;
+}
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 8)
+
+/**
+ * ccs_rcu_free - RCU callback for releasing "struct ccs_security".
+ *
+ * @rcu: Pointer to "struct rcu_head".
+ *
+ * Returns nothing.
+ */
+static void ccs_rcu_free(struct rcu_head *rcu)
+{
+	struct ccs_security *ptr = container_of(rcu, typeof(*ptr), rcu);
+	kfree(ptr);
+}
+
+#else
+
+/**
+ * ccs_rcu_free - RCU callback for releasing "struct ccs_security".
+ *
+ * @arg: Pointer to "void".
+ *
+ * Returns nothing.
+ */
+static void ccs_rcu_free(void *arg)
+{
+	struct ccs_security *ptr = arg;
+	kfree(ptr);
+}
+
+#endif
+
+/**
+ * __ccs_free_task_security - Release memory associated with "struct task_struct".
+ *
+ * @task: Pointer to "struct task_struct".
+ *
+ * Returns nothing.
+ */
+static void __ccs_free_task_security(const struct task_struct *task)
+{
+	unsigned long flags;
+	struct ccs_security *ptr = ccs_find_task_security(task);
+	if (ptr == &ccs_default_security || ptr == &ccs_oom_security)
+		return;
+	spin_lock_irqsave(&ccs_task_security_list_lock, flags);
+	list_del_rcu(&ptr->list);
+	spin_unlock_irqrestore(&ccs_task_security_list_lock, flags);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 8)
+	call_rcu(&ptr->rcu, ccs_rcu_free);
+#else
+	call_rcu(&ptr->rcu, ccs_rcu_free, ptr);
+#endif
+}
+
+#endif
+
+/**
+ * ccs_mm_init - Initialize mm related code.
+ *
+ * Returns nothing.
+ */
+void __init ccs_mm_init(void)
+{
+	int idx;
+	for (idx = 0; idx < CCS_MAX_HASH; idx++)
+		INIT_LIST_HEAD(&ccs_name_list[idx]);
+#ifdef CONFIG_CCSECURITY_USE_EXTERNAL_TASK_SECURITY
+	for (idx = 0; idx < CCS_MAX_TASK_SECURITY_HASH; idx++)
+		INIT_LIST_HEAD(&ccs_task_security_list[idx]);
+#endif
+	smp_wmb(); /* Avoid out of order execution. */
+#ifdef CONFIG_CCSECURITY_USE_EXTERNAL_TASK_SECURITY
+	ccsecurity_ops.alloc_task_security = __ccs_alloc_task_security;
+	ccsecurity_ops.free_task_security = __ccs_free_task_security;
+#endif
+	ccs_kernel_domain.domainname = ccs_get_name("<kernel>");
+	list_add_tail_rcu(&ccs_kernel_domain.list, &ccs_domain_list);
+}
diff --git a/security/ccsecurity/permission.c b/security/ccsecurity/permission.c
new file mode 100644
index 0000000..d73c237
--- /dev/null
+++ b/security/ccsecurity/permission.c
@@ -0,0 +1,5025 @@
+/*
+ * security/ccsecurity/permission.c
+ *
+ * Copyright (C) 2005-2012  NTT DATA CORPORATION
+ *
+ * Version: 1.8.4   2015/05/05
+ */
+
+#include "internal.h"
+
+/***** SECTION1: Constants definition *****/
+
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 32)
+
+/*
+ * may_open() receives open flags modified by open_to_namei_flags() until
+ * 2.6.32. We stop here in case some distributions backported ACC_MODE changes,
+ * for we can't determine whether may_open() receives open flags modified by
+ * open_to_namei_flags() or not.
+ */
+#ifdef ACC_MODE
+#error ACC_MODE already defined.
+#endif
+#define ACC_MODE(x) ("\000\004\002\006"[(x)&O_ACCMODE])
+
+#if defined(RHEL_MAJOR) && RHEL_MAJOR == 6
+/* RHEL6 passes unmodified flags since 2.6.32-71.14.1.el6 . */
+#undef ACC_MODE
+#define ACC_MODE(x) ("\004\002\006"[(x)&O_ACCMODE])
+#endif
+
+#endif
+
+/* String table for special mount operations. */
+static const char * const ccs_mounts[CCS_MAX_SPECIAL_MOUNT] = {
+	[CCS_MOUNT_BIND]            = "--bind",
+	[CCS_MOUNT_MOVE]            = "--move",
+	[CCS_MOUNT_REMOUNT]         = "--remount",
+	[CCS_MOUNT_MAKE_UNBINDABLE] = "--make-unbindable",
+	[CCS_MOUNT_MAKE_PRIVATE]    = "--make-private",
+	[CCS_MOUNT_MAKE_SLAVE]      = "--make-slave",
+	[CCS_MOUNT_MAKE_SHARED]     = "--make-shared",
+};
+
+/* Mapping table from "enum ccs_path_acl_index" to "enum ccs_mac_index". */
+static const u8 ccs_p2mac[CCS_MAX_PATH_OPERATION] = {
+	[CCS_TYPE_EXECUTE]    = CCS_MAC_FILE_EXECUTE,
+	[CCS_TYPE_READ]       = CCS_MAC_FILE_OPEN,
+	[CCS_TYPE_WRITE]      = CCS_MAC_FILE_OPEN,
+	[CCS_TYPE_APPEND]     = CCS_MAC_FILE_OPEN,
+	[CCS_TYPE_UNLINK]     = CCS_MAC_FILE_UNLINK,
+#ifdef CONFIG_CCSECURITY_FILE_GETATTR
+	[CCS_TYPE_GETATTR]    = CCS_MAC_FILE_GETATTR,
+#endif
+	[CCS_TYPE_RMDIR]      = CCS_MAC_FILE_RMDIR,
+	[CCS_TYPE_TRUNCATE]   = CCS_MAC_FILE_TRUNCATE,
+	[CCS_TYPE_SYMLINK]    = CCS_MAC_FILE_SYMLINK,
+	[CCS_TYPE_CHROOT]     = CCS_MAC_FILE_CHROOT,
+	[CCS_TYPE_UMOUNT]     = CCS_MAC_FILE_UMOUNT,
+};
+
+/* Mapping table from "enum ccs_mkdev_acl_index" to "enum ccs_mac_index". */
+const u8 ccs_pnnn2mac[CCS_MAX_MKDEV_OPERATION] = {
+	[CCS_TYPE_MKBLOCK] = CCS_MAC_FILE_MKBLOCK,
+	[CCS_TYPE_MKCHAR]  = CCS_MAC_FILE_MKCHAR,
+};
+
+/* Mapping table from "enum ccs_path2_acl_index" to "enum ccs_mac_index". */
+const u8 ccs_pp2mac[CCS_MAX_PATH2_OPERATION] = {
+	[CCS_TYPE_LINK]       = CCS_MAC_FILE_LINK,
+	[CCS_TYPE_RENAME]     = CCS_MAC_FILE_RENAME,
+	[CCS_TYPE_PIVOT_ROOT] = CCS_MAC_FILE_PIVOT_ROOT,
+};
+
+/*
+ * Mapping table from "enum ccs_path_number_acl_index" to "enum ccs_mac_index".
+ */
+const u8 ccs_pn2mac[CCS_MAX_PATH_NUMBER_OPERATION] = {
+	[CCS_TYPE_CREATE] = CCS_MAC_FILE_CREATE,
+	[CCS_TYPE_MKDIR]  = CCS_MAC_FILE_MKDIR,
+	[CCS_TYPE_MKFIFO] = CCS_MAC_FILE_MKFIFO,
+	[CCS_TYPE_MKSOCK] = CCS_MAC_FILE_MKSOCK,
+	[CCS_TYPE_IOCTL]  = CCS_MAC_FILE_IOCTL,
+	[CCS_TYPE_CHMOD]  = CCS_MAC_FILE_CHMOD,
+	[CCS_TYPE_CHOWN]  = CCS_MAC_FILE_CHOWN,
+	[CCS_TYPE_CHGRP]  = CCS_MAC_FILE_CHGRP,
+};
+
+#ifdef CONFIG_CCSECURITY_NETWORK
+
+/*
+ * Mapping table from "enum ccs_network_acl_index" to "enum ccs_mac_index" for
+ * inet domain socket.
+ */
+static const u8 ccs_inet2mac[CCS_SOCK_MAX][CCS_MAX_NETWORK_OPERATION] = {
+	[SOCK_STREAM] = {
+		[CCS_NETWORK_BIND]    = CCS_MAC_NETWORK_INET_STREAM_BIND,
+		[CCS_NETWORK_LISTEN]  = CCS_MAC_NETWORK_INET_STREAM_LISTEN,
+		[CCS_NETWORK_CONNECT] = CCS_MAC_NETWORK_INET_STREAM_CONNECT,
+		[CCS_NETWORK_ACCEPT]  = CCS_MAC_NETWORK_INET_STREAM_ACCEPT,
+	},
+	[SOCK_DGRAM] = {
+		[CCS_NETWORK_BIND]    = CCS_MAC_NETWORK_INET_DGRAM_BIND,
+		[CCS_NETWORK_SEND]    = CCS_MAC_NETWORK_INET_DGRAM_SEND,
+#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG
+		[CCS_NETWORK_RECV]    = CCS_MAC_NETWORK_INET_DGRAM_RECV,
+#endif
+	},
+	[SOCK_RAW]    = {
+		[CCS_NETWORK_BIND]    = CCS_MAC_NETWORK_INET_RAW_BIND,
+		[CCS_NETWORK_SEND]    = CCS_MAC_NETWORK_INET_RAW_SEND,
+#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG
+		[CCS_NETWORK_RECV]    = CCS_MAC_NETWORK_INET_RAW_RECV,
+#endif
+	},
+};
+
+/*
+ * Mapping table from "enum ccs_network_acl_index" to "enum ccs_mac_index" for
+ * unix domain socket.
+ */
+static const u8 ccs_unix2mac[CCS_SOCK_MAX][CCS_MAX_NETWORK_OPERATION] = {
+	[SOCK_STREAM] = {
+		[CCS_NETWORK_BIND]    = CCS_MAC_NETWORK_UNIX_STREAM_BIND,
+		[CCS_NETWORK_LISTEN]  = CCS_MAC_NETWORK_UNIX_STREAM_LISTEN,
+		[CCS_NETWORK_CONNECT] = CCS_MAC_NETWORK_UNIX_STREAM_CONNECT,
+		[CCS_NETWORK_ACCEPT]  = CCS_MAC_NETWORK_UNIX_STREAM_ACCEPT,
+	},
+	[SOCK_DGRAM] = {
+		[CCS_NETWORK_BIND]    = CCS_MAC_NETWORK_UNIX_DGRAM_BIND,
+		[CCS_NETWORK_SEND]    = CCS_MAC_NETWORK_UNIX_DGRAM_SEND,
+#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG
+		[CCS_NETWORK_RECV]    = CCS_MAC_NETWORK_UNIX_DGRAM_RECV,
+#endif
+	},
+	[SOCK_SEQPACKET] = {
+		[CCS_NETWORK_BIND]    = CCS_MAC_NETWORK_UNIX_SEQPACKET_BIND,
+		[CCS_NETWORK_LISTEN]  = CCS_MAC_NETWORK_UNIX_SEQPACKET_LISTEN,
+		[CCS_NETWORK_CONNECT] = CCS_MAC_NETWORK_UNIX_SEQPACKET_CONNECT,
+		[CCS_NETWORK_ACCEPT]  = CCS_MAC_NETWORK_UNIX_SEQPACKET_ACCEPT,
+	},
+};
+
+#endif
+
+#ifdef CONFIG_CCSECURITY_CAPABILITY
+
+/*
+ * Mapping table from "enum ccs_capability_acl_index" to "enum ccs_mac_index".
+ */
+const u8 ccs_c2mac[CCS_MAX_CAPABILITY_INDEX] = {
+	[CCS_USE_ROUTE_SOCKET]  = CCS_MAC_CAPABILITY_USE_ROUTE_SOCKET,
+	[CCS_USE_PACKET_SOCKET] = CCS_MAC_CAPABILITY_USE_PACKET_SOCKET,
+	[CCS_SYS_REBOOT]        = CCS_MAC_CAPABILITY_SYS_REBOOT,
+	[CCS_SYS_VHANGUP]       = CCS_MAC_CAPABILITY_SYS_VHANGUP,
+	[CCS_SYS_SETTIME]       = CCS_MAC_CAPABILITY_SYS_SETTIME,
+	[CCS_SYS_NICE]          = CCS_MAC_CAPABILITY_SYS_NICE,
+	[CCS_SYS_SETHOSTNAME]   = CCS_MAC_CAPABILITY_SYS_SETHOSTNAME,
+	[CCS_USE_KERNEL_MODULE] = CCS_MAC_CAPABILITY_USE_KERNEL_MODULE,
+	[CCS_SYS_KEXEC_LOAD]    = CCS_MAC_CAPABILITY_SYS_KEXEC_LOAD,
+	[CCS_SYS_PTRACE]        = CCS_MAC_CAPABILITY_SYS_PTRACE,
+};
+
+#endif
+
+/***** SECTION2: Structure definition *****/
+
+/* Structure for holding inet domain socket's address. */
+struct ccs_inet_addr_info {
+	u16 port;           /* In network byte order. */
+	const u32 *address; /* In network byte order. */
+	bool is_ipv6;
+};
+
+/* Structure for holding unix domain socket's address. */
+struct ccs_unix_addr_info {
+	u8 *addr; /* This may not be '\0' terminated string. */
+	unsigned int addr_len;
+};
+
+/* Structure for holding socket address. */
+struct ccs_addr_info {
+	u8 protocol;
+	u8 operation;
+	struct ccs_inet_addr_info inet;
+	struct ccs_unix_addr_info unix0;
+};
+
+/***** SECTION3: Prototype definition section *****/
+
+bool ccs_dump_page(struct linux_binprm *bprm, unsigned long pos,
+		   struct ccs_page_dump *dump);
+void ccs_get_attributes(struct ccs_obj_info *obj);
+
+static bool ccs_alphabet_char(const char c);
+static bool ccs_argv(const unsigned int index, const char *arg_ptr,
+		     const int argc, const struct ccs_argv *argv, u8 *checked);
+static bool ccs_byte_range(const char *str);
+static bool ccs_check_entry(struct ccs_request_info *r,
+			    struct ccs_acl_info *ptr);
+static bool ccs_check_mkdev_acl(struct ccs_request_info *r,
+				const struct ccs_acl_info *ptr);
+static bool ccs_check_mount_acl(struct ccs_request_info *r,
+				const struct ccs_acl_info *ptr);
+static bool ccs_check_path2_acl(struct ccs_request_info *r,
+				const struct ccs_acl_info *ptr);
+static bool ccs_check_path_acl(struct ccs_request_info *r,
+			       const struct ccs_acl_info *ptr);
+static bool ccs_check_path_number_acl(struct ccs_request_info *r,
+				      const struct ccs_acl_info *ptr);
+static bool ccs_compare_number_union(const unsigned long value,
+				     const struct ccs_number_union *ptr);
+static bool ccs_condition(struct ccs_request_info *r,
+			  const struct ccs_condition *cond);
+static bool ccs_decimal(const char c);
+static bool ccs_envp(const char *env_name, const char *env_value,
+		     const int envc, const struct ccs_envp *envp, u8 *checked);
+static bool ccs_file_matches_pattern(const char *filename,
+				     const char *filename_end,
+				     const char *pattern,
+				     const char *pattern_end);
+static bool ccs_file_matches_pattern2(const char *filename,
+				      const char *filename_end,
+				      const char *pattern,
+				      const char *pattern_end);
+static bool ccs_get_realpath(struct ccs_path_info *buf, struct path *path);
+static bool ccs_hexadecimal(const char c);
+static bool ccs_number_matches_group(const unsigned long min,
+				     const unsigned long max,
+				     const struct ccs_group *group);
+static bool ccs_path_matches_pattern(const struct ccs_path_info *filename,
+				     const struct ccs_path_info *pattern);
+static bool ccs_path_matches_pattern2(const char *f, const char *p);
+static bool ccs_scan_bprm(struct ccs_execve *ee, const u16 argc,
+			  const struct ccs_argv *argv, const u16 envc,
+			  const struct ccs_envp *envp);
+static bool ccs_scan_exec_realpath(struct file *file,
+				   const struct ccs_name_union *ptr,
+				   const bool match);
+static bool ccs_scan_transition(const struct list_head *list,
+				const struct ccs_path_info *domainname,
+				const struct ccs_path_info *program,
+				const char *last_name,
+				const enum ccs_transition_type type);
+static const char *ccs_last_word(const char *name);
+static const struct ccs_path_info *ccs_compare_name_union
+(const struct ccs_path_info *name, const struct ccs_name_union *ptr);
+static const struct ccs_path_info *ccs_path_matches_group
+(const struct ccs_path_info *pathname, const struct ccs_group *group);
+static enum ccs_transition_type ccs_transition_type
+(const struct ccs_policy_namespace *ns, const struct ccs_path_info *domainname,
+ const struct ccs_path_info *program);
+static int __ccs_chmod_permission(struct dentry *dentry,
+				  struct vfsmount *vfsmnt, mode_t mode);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 5, 0)
+static int __ccs_chown_permission(struct dentry *dentry,
+				  struct vfsmount *vfsmnt, kuid_t user,
+				  kgid_t group);
+#else
+static int __ccs_chown_permission(struct dentry *dentry,
+				  struct vfsmount *vfsmnt, uid_t user,
+				  gid_t group);
+#endif
+static int __ccs_chroot_permission(struct path *path);
+static int __ccs_fcntl_permission(struct file *file, unsigned int cmd,
+				  unsigned long arg);
+static int __ccs_ioctl_permission(struct file *filp, unsigned int cmd,
+				  unsigned long arg);
+static int __ccs_link_permission(struct dentry *old_dentry,
+				 struct dentry *new_dentry,
+				 struct vfsmount *mnt);
+static int __ccs_mkdir_permission(struct dentry *dentry, struct vfsmount *mnt,
+				  unsigned int mode);
+static int __ccs_mknod_permission(struct dentry *dentry, struct vfsmount *mnt,
+				  const unsigned int mode, unsigned int dev);
+static int __ccs_mount_permission(const char *dev_name, struct path *path,
+				  const char *type, unsigned long flags,
+				  void *data_page);
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 30)
+static int __ccs_open_exec_permission(struct dentry *dentry,
+				      struct vfsmount *mnt);
+#endif
+static int __ccs_open_permission(struct dentry *dentry, struct vfsmount *mnt,
+				 const int flag);
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 18) || (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 33) && defined(CONFIG_SYSCTL_SYSCALL))
+static int __ccs_parse_table(int __user *name, int nlen, void __user *oldval,
+			     void __user *newval, struct ctl_table *table);
+#endif
+static int __ccs_pivot_root_permission(struct path *old_path,
+				       struct path *new_path);
+static int __ccs_rename_permission(struct dentry *old_dentry,
+				   struct dentry *new_dentry,
+				   struct vfsmount *mnt);
+static int __ccs_rmdir_permission(struct dentry *dentry, struct vfsmount *mnt);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 8, 0)
+static int __ccs_search_binary_handler(struct linux_binprm *bprm);
+#else
+static int __ccs_search_binary_handler(struct linux_binprm *bprm,
+				       struct pt_regs *regs);
+#endif
+static int __ccs_symlink_permission(struct dentry *dentry,
+				    struct vfsmount *mnt, const char *from);
+static int __ccs_truncate_permission(struct dentry *dentry,
+				     struct vfsmount *mnt);
+static int __ccs_umount_permission(struct vfsmount *mnt, int flags);
+static int __ccs_unlink_permission(struct dentry *dentry,
+				   struct vfsmount *mnt);
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 30)
+static int __ccs_uselib_permission(struct dentry *dentry,
+				   struct vfsmount *mnt);
+#endif
+static int ccs_execute_permission(struct ccs_request_info *r,
+				  const struct ccs_path_info *filename);
+static int ccs_find_next_domain(struct ccs_execve *ee);
+static int ccs_get_path(const char *pathname, struct path *path);
+static int ccs_kern_path(const char *pathname, int flags, struct path *path);
+static int ccs_mkdev_perm(const u8 operation, struct dentry *dentry,
+			  struct vfsmount *mnt, const unsigned int mode,
+			  unsigned int dev);
+static int ccs_mount_acl(struct ccs_request_info *r, const char *dev_name,
+			 struct path *dir, const char *type,
+			 unsigned long flags);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 33)
+static int ccs_new_open_permission(struct file *filp);
+#endif
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 24)
+static int ccs_old_chroot_permission(struct nameidata *nd);
+static int ccs_old_mount_permission(const char *dev_name, struct nameidata *nd,
+				    const char *type, unsigned long flags,
+				    void *data_page);
+static int ccs_old_pivot_root_permission(struct nameidata *old_nd,
+					 struct nameidata *new_nd);
+#endif
+static int ccs_path2_perm(const u8 operation, struct dentry *dentry1,
+			  struct vfsmount *mnt1, struct dentry *dentry2,
+			  struct vfsmount *mnt2);
+static int ccs_path_number_perm(const u8 type, struct dentry *dentry,
+				struct vfsmount *vfsmnt, unsigned long number);
+static int ccs_path_perm(const u8 operation, struct dentry *dentry,
+			 struct vfsmount *mnt, const char *target);
+static int ccs_path_permission(struct ccs_request_info *r, u8 operation,
+			       const struct ccs_path_info *filename);
+static int ccs_start_execve(struct linux_binprm *bprm,
+			    struct ccs_execve **eep);
+static int ccs_symlink_path(const char *pathname, struct ccs_path_info *name);
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 32)
+static void __ccs_clear_open_mode(void);
+static void __ccs_save_open_mode(int mode);
+#endif
+static void ccs_add_slash(struct ccs_path_info *buf);
+static void ccs_finish_execve(int retval, struct ccs_execve *ee);
+
+#ifdef CONFIG_CCSECURITY_MISC
+static bool ccs_check_env_acl(struct ccs_request_info *r,
+			      const struct ccs_acl_info *ptr);
+static int ccs_env_perm(struct ccs_request_info *r, const char *env);
+static int ccs_environ(struct ccs_execve *ee);
+#endif
+
+#ifdef CONFIG_CCSECURITY_CAPABILITY
+static bool __ccs_capable(const u8 operation);
+static bool ccs_check_capability_acl(struct ccs_request_info *r,
+				     const struct ccs_acl_info *ptr);
+static bool ccs_kernel_service(void);
+static int __ccs_ptrace_permission(long request, long pid);
+static int __ccs_socket_create_permission(int family, int type, int protocol);
+#endif
+
+#ifdef CONFIG_CCSECURITY_NETWORK
+static bool ccs_address_matches_group(const bool is_ipv6, const u32 *address,
+				      const struct ccs_group *group);
+static bool ccs_check_inet_acl(struct ccs_request_info *r,
+			       const struct ccs_acl_info *ptr);
+static bool ccs_check_unix_acl(struct ccs_request_info *r,
+			       const struct ccs_acl_info *ptr);
+static bool ccs_kernel_service(void);
+static int __ccs_socket_bind_permission(struct socket *sock,
+					struct sockaddr *addr, int addr_len);
+static int __ccs_socket_connect_permission(struct socket *sock,
+					   struct sockaddr *addr,
+					   int addr_len);
+static int __ccs_socket_listen_permission(struct socket *sock);
+static int __ccs_socket_post_accept_permission(struct socket *sock,
+					       struct socket *newsock);
+static int __ccs_socket_sendmsg_permission(struct socket *sock,
+					   struct msghdr *msg, int size);
+static int ccs_check_inet_address(const struct sockaddr *addr,
+				  const unsigned int addr_len, const u16 port,
+				  struct ccs_addr_info *address);
+static int ccs_check_unix_address(struct sockaddr *addr,
+				  const unsigned int addr_len,
+				  struct ccs_addr_info *address);
+static int ccs_inet_entry(const struct ccs_addr_info *address);
+static int ccs_unix_entry(const struct ccs_addr_info *address);
+static u8 ccs_sock_family(struct sock *sk);
+#endif
+
+#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG
+static int __ccs_socket_post_recvmsg_permission(struct sock *sk,
+						struct sk_buff *skb,
+						int flags);
+#endif
+
+#ifdef CONFIG_CCSECURITY_IPC
+static bool ccs_check_signal_acl(struct ccs_request_info *r,
+				 const struct ccs_acl_info *ptr);
+static int ccs_signal_acl(const int pid, const int sig);
+static int ccs_signal_acl0(pid_t tgid, pid_t pid, int sig);
+static int ccs_signal_acl2(const int sig, const int pid);
+#endif
+
+#ifdef CONFIG_CCSECURITY_FILE_GETATTR
+static int __ccs_getattr_permission(struct vfsmount *mnt,
+				    struct dentry *dentry);
+#endif
+
+#ifdef CONFIG_CCSECURITY_TASK_EXECUTE_HANDLER
+static bool ccs_find_execute_handler(struct ccs_execve *ee, const u8 type);
+static int ccs_try_alt_exec(struct ccs_execve *ee);
+static void ccs_unescape(unsigned char *dest);
+#endif
+
+#ifdef CONFIG_CCSECURITY_TASK_DOMAIN_TRANSITION
+static bool ccs_check_task_acl(struct ccs_request_info *r,
+			       const struct ccs_acl_info *ptr);
+#endif
+
+/***** SECTION4: Standalone functions section *****/
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 36)
+
+/**
+ * ccs_copy_argv - Wrapper for copy_strings_kernel().
+ *
+ * @arg:  String to copy.
+ * @bprm: Pointer to "struct linux_binprm".
+ *
+ * Returns return value of copy_strings_kernel().
+ */
+static inline int ccs_copy_argv(const char *arg, struct linux_binprm *bprm)
+{
+	const int ret = copy_strings_kernel(1, &arg, bprm);
+	if (ret >= 0)
+		bprm->argc++;
+	return ret;
+}
+
+#else
+
+/**
+ * ccs_copy_argv - Wrapper for copy_strings_kernel().
+ *
+ * @arg:  String to copy.
+ * @bprm: Pointer to "struct linux_binprm".
+ *
+ * Returns return value of copy_strings_kernel().
+ */
+static inline int ccs_copy_argv(char *arg, struct linux_binprm *bprm)
+{
+	const int ret = copy_strings_kernel(1, &arg, bprm);
+	if (ret >= 0)
+		bprm->argc++;
+	return ret;
+}
+
+#endif
+
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 35)
+
+/**
+ * get_fs_root - Get reference on root directory.
+ *
+ * @fs:   Pointer to "struct fs_struct".
+ * @root: Pointer to "struct path".
+ *
+ * Returns nothing.
+ *
+ * This is for compatibility with older kernels.
+ */
+static inline void get_fs_root(struct fs_struct *fs, struct path *root)
+{
+	read_lock(&fs->lock);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25)
+	*root = fs->root;
+	path_get(root);
+#else
+	root->dentry = dget(fs->root);
+	root->mnt = mntget(fs->rootmnt);
+#endif
+	read_unlock(&fs->lock);
+}
+
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0)
+
+/**
+ * module_put - Put a reference on module.
+ *
+ * @module: Pointer to "struct module". Maybe NULL.
+ *
+ * Returns nothing.
+ *
+ * This is for compatibility with older kernels.
+ */
+static inline void module_put(struct module *module)
+{
+	if (module)
+		__MOD_DEC_USE_COUNT(module);
+}
+
+#endif
+
+/**
+ * ccs_put_filesystem - Wrapper for put_filesystem().
+ *
+ * @fstype: Pointer to "struct file_system_type".
+ *
+ * Returns nothing.
+ *
+ * Since put_filesystem() is not exported, I embed put_filesystem() here.
+ */
+static inline void ccs_put_filesystem(struct file_system_type *fstype)
+{
+	module_put(fstype->owner);
+}
+
+#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 22)
+#if !defined(RHEL_MAJOR) || RHEL_MAJOR != 5
+#if !defined(AX_MAJOR) || AX_MAJOR != 3
+
+/**
+ * ip_hdr - Get "struct iphdr".
+ *
+ * @skb: Pointer to "struct sk_buff".
+ *
+ * Returns pointer to "struct iphdr".
+ *
+ * This is for compatibility with older kernels.
+ */
+static inline struct iphdr *ip_hdr(const struct sk_buff *skb)
+{
+	return skb->nh.iph;
+}
+
+/**
+ * udp_hdr - Get "struct udphdr".
+ *
+ * @skb: Pointer to "struct sk_buff".
+ *
+ * Returns pointer to "struct udphdr".
+ *
+ * This is for compatibility with older kernels.
+ */
+static inline struct udphdr *udp_hdr(const struct sk_buff *skb)
+{
+	return skb->h.uh;
+}
+
+/**
+ * ipv6_hdr - Get "struct ipv6hdr".
+ *
+ * @skb: Pointer to "struct sk_buff".
+ *
+ * Returns pointer to "struct ipv6hdr".
+ *
+ * This is for compatibility with older kernels.
+ */
+static inline struct ipv6hdr *ipv6_hdr(const struct sk_buff *skb)
+{
+	return skb->nh.ipv6h;
+}
+
+#endif
+#endif
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0)
+
+/**
+ * skb_kill_datagram - Kill a datagram forcibly.
+ *
+ * @sk:    Pointer to "struct sock".
+ * @skb:   Pointer to "struct sk_buff".
+ * @flags: Flags passed to skb_recv_datagram().
+ *
+ * Returns nothing.
+ */
+static inline void skb_kill_datagram(struct sock *sk, struct sk_buff *skb,
+				     int flags)
+{
+	/* Clear queue. */
+	if (flags & MSG_PEEK) {
+		int clear = 0;
+		spin_lock_irq(&sk->receive_queue.lock);
+		if (skb == skb_peek(&sk->receive_queue)) {
+			__skb_unlink(skb, &sk->receive_queue);
+			clear = 1;
+		}
+		spin_unlock_irq(&sk->receive_queue.lock);
+		if (clear)
+			kfree_skb(skb);
+	}
+	skb_free_datagram(sk, skb);
+}
+
+#elif LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 16)
+
+/**
+ * skb_kill_datagram - Kill a datagram forcibly.
+ *
+ * @sk:    Pointer to "struct sock".
+ * @skb:   Pointer to "struct sk_buff".
+ * @flags: Flags passed to skb_recv_datagram().
+ *
+ * Returns nothing.
+ */
+static inline void skb_kill_datagram(struct sock *sk, struct sk_buff *skb,
+				     int flags)
+{
+	/* Clear queue. */
+	if (flags & MSG_PEEK) {
+		int clear = 0;
+		spin_lock_bh(&sk->sk_receive_queue.lock);
+		if (skb == skb_peek(&sk->sk_receive_queue)) {
+			__skb_unlink(skb, &sk->sk_receive_queue);
+			clear = 1;
+		}
+		spin_unlock_bh(&sk->sk_receive_queue.lock);
+		if (clear)
+			kfree_skb(skb);
+	}
+	skb_free_datagram(sk, skb);
+}
+
+#endif
+
+#endif
+
+/***** SECTION5: Variables definition section *****/
+
+/* The initial domain. */
+struct ccs_domain_info ccs_kernel_domain;
+
+/* The list for "struct ccs_domain_info". */
+LIST_HEAD(ccs_domain_list);
+
+/***** SECTION6: Dependent functions section *****/
+
+/**
+ * ccs_path_matches_group - Check whether the given pathname matches members of the given pathname group.
+ *
+ * @pathname: The name of pathname.
+ * @group:    Pointer to "struct ccs_path_group".
+ *
+ * Returns matched member's pathname if @pathname matches pathnames in @group,
+ * NULL otherwise.
+ *
+ * Caller holds ccs_read_lock().
+ */
+static const struct ccs_path_info *ccs_path_matches_group
+(const struct ccs_path_info *pathname, const struct ccs_group *group)
+{
+	struct ccs_path_group *member;
+	list_for_each_entry_srcu(member, &group->member_list, head.list,
+				 &ccs_ss) {
+		if (member->head.is_deleted)
+			continue;
+		if (!ccs_path_matches_pattern(pathname, member->member_name))
+			continue;
+		return member->member_name;
+	}
+	return NULL;
+}
+
+/**
+ * ccs_number_matches_group - Check whether the given number matches members of the given number group.
+ *
+ * @min:   Min number.
+ * @max:   Max number.
+ * @group: Pointer to "struct ccs_number_group".
+ *
+ * Returns true if @min and @max partially overlaps @group, false otherwise.
+ *
+ * Caller holds ccs_read_lock().
+ */
+static bool ccs_number_matches_group(const unsigned long min,
+				     const unsigned long max,
+				     const struct ccs_group *group)
+{
+	struct ccs_number_group *member;
+	bool matched = false;
+	list_for_each_entry_srcu(member, &group->member_list, head.list,
+				 &ccs_ss) {
+		if (member->head.is_deleted)
+			continue;
+		if (min > member->number.values[1] ||
+		    max < member->number.values[0])
+			continue;
+		matched = true;
+		break;
+	}
+	return matched;
+}
+
+/**
+ * ccs_check_entry - Do permission check.
+ *
+ * @r:   Pointer to "struct ccs_request_info".
+ * @ptr: Pointer to "struct ccs_acl_info".
+ *
+ * Returns true on match, false otherwise.
+ *
+ * Caller holds ccs_read_lock().
+ */
+static bool ccs_check_entry(struct ccs_request_info *r,
+			    struct ccs_acl_info *ptr)
+{
+	if (ptr->is_deleted || ptr->type != r->param_type)
+		return false;
+	switch (r->param_type) {
+	case CCS_TYPE_PATH_ACL:
+		return ccs_check_path_acl(r, ptr);
+	case CCS_TYPE_PATH2_ACL:
+		return ccs_check_path2_acl(r, ptr);
+	case CCS_TYPE_PATH_NUMBER_ACL:
+		return ccs_check_path_number_acl(r, ptr);
+	case CCS_TYPE_MKDEV_ACL:
+		return ccs_check_mkdev_acl(r, ptr);
+	case CCS_TYPE_MOUNT_ACL:
+		return ccs_check_mount_acl(r, ptr);
+#ifdef CONFIG_CCSECURITY_MISC
+	case CCS_TYPE_ENV_ACL:
+		return ccs_check_env_acl(r, ptr);
+#endif
+#ifdef CONFIG_CCSECURITY_CAPABILITY
+	case CCS_TYPE_CAPABILITY_ACL:
+		return ccs_check_capability_acl(r, ptr);
+#endif
+#ifdef CONFIG_CCSECURITY_NETWORK
+	case CCS_TYPE_INET_ACL:
+		return ccs_check_inet_acl(r, ptr);
+	case CCS_TYPE_UNIX_ACL:
+		return ccs_check_unix_acl(r, ptr);
+#endif
+#ifdef CONFIG_CCSECURITY_IPC
+	case CCS_TYPE_SIGNAL_ACL:
+		return ccs_check_signal_acl(r, ptr);
+#endif
+#ifdef CONFIG_CCSECURITY_TASK_DOMAIN_TRANSITION
+	case CCS_TYPE_MANUAL_TASK_ACL:
+		return ccs_check_task_acl(r, ptr);
+#endif
+	}
+	return true;
+}
+
+/**
+ * ccs_check_acl - Do permission check.
+ *
+ * @r: Pointer to "struct ccs_request_info".
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds ccs_read_lock().
+ */
+int ccs_check_acl(struct ccs_request_info *r)
+{
+	const struct ccs_domain_info *domain = ccs_current_domain();
+	int error;
+	do {
+		struct ccs_acl_info *ptr;
+		const struct list_head *list = &domain->acl_info_list;
+		u16 i = 0;
+retry:
+		list_for_each_entry_srcu(ptr, list, list, &ccs_ss) {
+			if (!ccs_check_entry(r, ptr))
+				continue;
+			if (!ccs_condition(r, ptr->cond))
+				continue;
+			r->matched_acl = ptr;
+			r->granted = true;
+			ccs_audit_log(r);
+			return 0;
+		}
+		for (; i < CCS_MAX_ACL_GROUPS; i++) {
+			if (!test_bit(i, domain->group))
+				continue;
+			list = &domain->ns->acl_group[i++];
+			goto retry;
+		}
+		r->granted = false;
+		error = ccs_audit_log(r);
+	} while (error == CCS_RETRY_REQUEST &&
+		 r->type != CCS_MAC_FILE_EXECUTE);
+	return error;
+}
+
+/**
+ * ccs_last_word - Get last component of a domainname.
+ *
+ * @name: Domainname to check.
+ *
+ * Returns the last word of @name.
+ */
+static const char *ccs_last_word(const char *name)
+{
+	const char *cp = strrchr(name, ' ');
+	if (cp)
+		return cp + 1;
+	return name;
+}
+
+/**
+ * ccs_scan_transition - Try to find specific domain transition type.
+ *
+ * @list:       Pointer to "struct list_head".
+ * @domainname: The name of current domain.
+ * @program:    The name of requested program.
+ * @last_name:  The last component of @domainname.
+ * @type:       One of values in "enum ccs_transition_type".
+ *
+ * Returns true if found one, false otherwise.
+ *
+ * Caller holds ccs_read_lock().
+ */
+static bool ccs_scan_transition(const struct list_head *list,
+				const struct ccs_path_info *domainname,
+				const struct ccs_path_info *program,
+				const char *last_name,
+				const enum ccs_transition_type type)
+{
+	const struct ccs_transition_control *ptr;
+	list_for_each_entry_srcu(ptr, list, head.list, &ccs_ss) {
+		if (ptr->head.is_deleted || ptr->type != type)
+			continue;
+		if (ptr->domainname) {
+			if (!ptr->is_last_name) {
+				if (ptr->domainname != domainname)
+					continue;
+			} else {
+				/*
+				 * Use direct strcmp() since this is
+				 * unlikely used.
+				 */
+				if (strcmp(ptr->domainname->name, last_name))
+					continue;
+			}
+		}
+		if (ptr->program && ccs_pathcmp(ptr->program, program))
+			continue;
+		return true;
+	}
+	return false;
+}
+
+/**
+ * ccs_transition_type - Get domain transition type.
+ *
+ * @ns:         Pointer to "struct ccs_policy_namespace".
+ * @domainname: The name of current domain.
+ * @program:    The name of requested program.
+ *
+ * Returns CCS_TRANSITION_CONTROL_TRANSIT if executing @program causes domain
+ * transition across namespaces, CCS_TRANSITION_CONTROL_INITIALIZE if executing
+ * @program reinitializes domain transition within that namespace,
+ * CCS_TRANSITION_CONTROL_KEEP if executing @program stays at @domainname ,
+ * others otherwise.
+ *
+ * Caller holds ccs_read_lock().
+ */
+static enum ccs_transition_type ccs_transition_type
+(const struct ccs_policy_namespace *ns, const struct ccs_path_info *domainname,
+ const struct ccs_path_info *program)
+{
+	const char *last_name = ccs_last_word(domainname->name);
+	enum ccs_transition_type type = CCS_TRANSITION_CONTROL_NO_RESET;
+	while (type < CCS_MAX_TRANSITION_TYPE) {
+		const struct list_head * const list =
+			&ns->policy_list[CCS_ID_TRANSITION_CONTROL];
+		if (!ccs_scan_transition(list, domainname, program, last_name,
+					 type)) {
+			type++;
+			continue;
+		}
+		if (type != CCS_TRANSITION_CONTROL_NO_RESET &&
+		    type != CCS_TRANSITION_CONTROL_NO_INITIALIZE)
+			break;
+		/*
+		 * Do not check for reset_domain if no_reset_domain matched.
+		 * Do not check for initialize_domain if no_initialize_domain
+		 * matched.
+		 */
+		type++;
+		type++;
+	}
+	return type;
+}
+
+/**
+ * ccs_find_next_domain - Find a domain.
+ *
+ * @ee: Pointer to "struct ccs_execve".
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds ccs_read_lock().
+ */
+static int ccs_find_next_domain(struct ccs_execve *ee)
+{
+	struct ccs_request_info *r = &ee->r;
+#ifdef CONFIG_CCSECURITY_TASK_EXECUTE_HANDLER
+	const struct ccs_path_info *handler = ee->handler;
+#endif
+	struct ccs_domain_info *domain = NULL;
+	struct ccs_domain_info * const old_domain = ccs_current_domain();
+	struct linux_binprm *bprm = ee->bprm;
+	struct ccs_security *task = ccs_current_security();
+	const struct ccs_path_info *candidate;
+	struct ccs_path_info exename;
+	int retval;
+	bool reject_on_transition_failure = false;
+
+	/* Get symlink's pathname of program. */
+	retval = ccs_symlink_path(bprm->filename, &exename);
+	if (retval < 0)
+		return retval;
+
+#ifdef CONFIG_CCSECURITY_TASK_EXECUTE_HANDLER
+	if (handler) {
+		/* No permission check for execute handler. */
+		candidate = &exename;
+		if (ccs_pathcmp(candidate, handler)) {
+			/* Failed to verify execute handler. */
+			static u8 counter = 20;
+			if (counter) {
+				counter--;
+				printk(KERN_WARNING "Failed to verify: %s\n",
+				       handler->name);
+			}
+			goto out;
+		}
+	} else
+#endif
+	{
+		struct ccs_aggregator *ptr;
+		struct list_head *list;
+retry:
+		/* Check 'aggregator' directive. */
+		candidate = &exename;
+		list = &old_domain->ns->policy_list[CCS_ID_AGGREGATOR];
+		list_for_each_entry_srcu(ptr, list, head.list, &ccs_ss) {
+			if (ptr->head.is_deleted ||
+			    !ccs_path_matches_pattern(candidate,
+						      ptr->original_name))
+				continue;
+			candidate = ptr->aggregated_name;
+			break;
+		}
+
+		/* Check execute permission. */
+		retval = ccs_execute_permission(r, candidate);
+		if (retval == CCS_RETRY_REQUEST)
+			goto retry;
+		if (retval < 0)
+			goto out;
+		/*
+		 * To be able to specify domainnames with wildcards, use the
+		 * pathname specified in the policy (which may contain
+		 * wildcard) rather than the pathname passed to execve()
+		 * (which never contains wildcard).
+		 */
+		if (r->param.path.matched_path)
+			candidate = r->param.path.matched_path;
+	}
+	/*
+	 * Check for domain transition preference if "file execute" matched.
+	 * If preference is given, make do_execve() fail if domain transition
+	 * has failed, for domain transition preference should be used with
+	 * destination domain defined.
+	 */
+	if (r->ee->transition) {
+		const char *domainname = r->ee->transition->name;
+		reject_on_transition_failure = true;
+		if (!strcmp(domainname, "keep"))
+			goto force_keep_domain;
+		if (!strcmp(domainname, "child"))
+			goto force_child_domain;
+		if (!strcmp(domainname, "reset"))
+			goto force_reset_domain;
+		if (!strcmp(domainname, "initialize"))
+			goto force_initialize_domain;
+		if (!strcmp(domainname, "parent")) {
+			char *cp;
+			strncpy(ee->tmp, old_domain->domainname->name,
+				CCS_EXEC_TMPSIZE - 1);
+			cp = strrchr(ee->tmp, ' ');
+			if (cp)
+				*cp = '\0';
+		} else if (*domainname == '<')
+			strncpy(ee->tmp, domainname, CCS_EXEC_TMPSIZE - 1);
+		else
+			snprintf(ee->tmp, CCS_EXEC_TMPSIZE - 1, "%s %s",
+				 old_domain->domainname->name, domainname);
+		goto force_jump_domain;
+	}
+	/*
+	 * No domain transition preference specified.
+	 * Calculate domain to transit to.
+	 */
+	switch (ccs_transition_type(old_domain->ns, old_domain->domainname,
+				    candidate)) {
+	case CCS_TRANSITION_CONTROL_RESET:
+force_reset_domain:
+		/* Transit to the root of specified namespace. */
+		snprintf(ee->tmp, CCS_EXEC_TMPSIZE - 1, "<%s>",
+			 candidate->name);
+		/*
+		 * Make do_execve() fail if domain transition across namespaces
+		 * has failed.
+		 */
+		reject_on_transition_failure = true;
+		break;
+	case CCS_TRANSITION_CONTROL_INITIALIZE:
+force_initialize_domain:
+		/* Transit to the child of current namespace's root. */
+		snprintf(ee->tmp, CCS_EXEC_TMPSIZE - 1, "%s %s",
+			 old_domain->ns->name, candidate->name);
+		break;
+	case CCS_TRANSITION_CONTROL_KEEP:
+force_keep_domain:
+		/* Keep current domain. */
+		domain = old_domain;
+		break;
+	default:
+		if (old_domain == &ccs_kernel_domain && !ccs_policy_loaded) {
+			/*
+			 * Needn't to transit from kernel domain before
+			 * starting /sbin/init. But transit from kernel domain
+			 * if executing initializers because they might start
+			 * before /sbin/init.
+			 */
+			domain = old_domain;
+			break;
+		}
+force_child_domain:
+		/* Normal domain transition. */
+		snprintf(ee->tmp, CCS_EXEC_TMPSIZE - 1, "%s %s",
+			 old_domain->domainname->name, candidate->name);
+		break;
+	}
+force_jump_domain:
+	/*
+	 * Tell GC that I started execve().
+	 * Also, tell open_exec() to check read permission.
+	 */
+	task->ccs_flags |= CCS_TASK_IS_IN_EXECVE;
+	/*
+	 * Make task->ccs_flags visible to GC before changing
+	 * task->ccs_domain_info.
+	 */
+	smp_wmb();
+	/*
+	 * Proceed to the next domain in order to allow reaching via PID.
+	 * It will be reverted if execve() failed. Reverting is not good.
+	 * But it is better than being unable to reach via PID in interactive
+	 * enforcing mode.
+	 */
+	if (!domain)
+		domain = ccs_assign_domain(ee->tmp, true);
+	if (domain)
+		retval = 0;
+	else if (reject_on_transition_failure) {
+		printk(KERN_WARNING
+		       "ERROR: Domain '%s' not ready.\n", ee->tmp);
+		retval = -ENOMEM;
+	} else if (r->mode == CCS_CONFIG_ENFORCING)
+		retval = -ENOMEM;
+	else {
+		retval = 0;
+		if (!old_domain->flags[CCS_DIF_TRANSITION_FAILED]) {
+			old_domain->flags[CCS_DIF_TRANSITION_FAILED] = true;
+			r->granted = false;
+			ccs_write_log(r, "%s",
+				      ccs_dif[CCS_DIF_TRANSITION_FAILED]);
+			printk(KERN_WARNING
+			       "ERROR: Domain '%s' not defined.\n", ee->tmp);
+		}
+	}
+out:
+	kfree(exename.name);
+	return retval;
+}
+
+#ifdef CONFIG_CCSECURITY_TASK_EXECUTE_HANDLER
+
+/**
+ * ccs_unescape - Unescape escaped string.
+ *
+ * @dest: String to unescape.
+ *
+ * Returns nothing.
+ */
+static void ccs_unescape(unsigned char *dest)
+{
+	unsigned char *src = dest;
+	unsigned char c;
+	unsigned char d;
+	unsigned char e;
+	while (1) {
+		c = *src++;
+		if (!c)
+			break;
+		if (c != '\\') {
+			*dest++ = c;
+			continue;
+		}
+		c = *src++;
+		if (c == '\\') {
+			*dest++ = c;
+			continue;
+		}
+		if (c < '0' || c > '3')
+			break;
+		d = *src++;
+		if (d < '0' || d > '7')
+			break;
+		e = *src++;
+		if (e < '0' || e > '7')
+			break;
+		*dest++ = ((c - '0') << 6) + ((d - '0') << 3) + (e - '0');
+	}
+	*dest = '\0';
+}
+
+/**
+ * ccs_try_alt_exec - Try to start execute handler.
+ *
+ * @ee: Pointer to "struct ccs_execve".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int ccs_try_alt_exec(struct ccs_execve *ee)
+{
+	/*
+	 * Contents of modified bprm.
+	 * The envp[] in original bprm is moved to argv[] so that
+	 * the alternatively executed program won't be affected by
+	 * some dangerous environment variables like LD_PRELOAD.
+	 *
+	 * modified bprm->argc
+	 *    = original bprm->argc + original bprm->envc + 7
+	 * modified bprm->envc
+	 *    = 0
+	 *
+	 * modified bprm->argv[0]
+	 *    = the program's name specified by *_execute_handler
+	 * modified bprm->argv[1]
+	 *    = ccs_current_domain()->domainname->name
+	 * modified bprm->argv[2]
+	 *    = the current process's name
+	 * modified bprm->argv[3]
+	 *    = the current process's information (e.g. uid/gid).
+	 * modified bprm->argv[4]
+	 *    = original bprm->filename
+	 * modified bprm->argv[5]
+	 *    = original bprm->argc in string expression
+	 * modified bprm->argv[6]
+	 *    = original bprm->envc in string expression
+	 * modified bprm->argv[7]
+	 *    = original bprm->argv[0]
+	 *  ...
+	 * modified bprm->argv[bprm->argc + 6]
+	 *     = original bprm->argv[bprm->argc - 1]
+	 * modified bprm->argv[bprm->argc + 7]
+	 *     = original bprm->envp[0]
+	 *  ...
+	 * modified bprm->argv[bprm->envc + bprm->argc + 6]
+	 *     = original bprm->envp[bprm->envc - 1]
+	 */
+	struct linux_binprm *bprm = ee->bprm;
+	struct file *filp;
+	int retval;
+	const int original_argc = bprm->argc;
+	const int original_envc = bprm->envc;
+
+	/* Close the requested program's dentry. */
+	ee->obj.path1.dentry = NULL;
+	ee->obj.path1.mnt = NULL;
+	ee->obj.stat_valid[CCS_PATH1] = false;
+	ee->obj.stat_valid[CCS_PATH1_PARENT] = false;
+	ee->obj.validate_done = false;
+	allow_write_access(bprm->file);
+	fput(bprm->file);
+	bprm->file = NULL;
+
+	/* Invalidate page dump cache. */
+	ee->dump.page = NULL;
+
+	/* Move envp[] to argv[] */
+	bprm->argc += bprm->envc;
+	bprm->envc = 0;
+
+	/* Set argv[6] */
+	{
+		snprintf(ee->tmp, CCS_EXEC_TMPSIZE - 1, "%d", original_envc);
+		retval = ccs_copy_argv(ee->tmp, bprm);
+		if (retval < 0)
+			goto out;
+	}
+
+	/* Set argv[5] */
+	{
+		snprintf(ee->tmp, CCS_EXEC_TMPSIZE - 1, "%d", original_argc);
+		retval = ccs_copy_argv(ee->tmp, bprm);
+		if (retval < 0)
+			goto out;
+	}
+
+	/* Set argv[4] */
+	{
+		retval = ccs_copy_argv(bprm->filename, bprm);
+		if (retval < 0)
+			goto out;
+	}
+
+	/* Set argv[3] */
+	{
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 5, 0)
+		/*
+		 * Pass uid/gid seen from current user namespace, for these
+		 * values are used by programs in current user namespace in
+		 * order to decide whether to execve() or not (rather than by
+		 * auditing daemon in init's user namespace).
+		 */
+		snprintf(ee->tmp, CCS_EXEC_TMPSIZE - 1,
+			 "pid=%d uid=%d gid=%d euid=%d egid=%d suid=%d "
+			 "sgid=%d fsuid=%d fsgid=%d", ccs_sys_getpid(),
+			 __kuid_val(current_uid()), __kgid_val(current_gid()),
+			 __kuid_val(current_euid()),
+			 __kgid_val(current_egid()),
+			 __kuid_val(current_suid()),
+			 __kgid_val(current_sgid()),
+			 __kuid_val(current_fsuid()),
+			 __kgid_val(current_fsgid()));
+#else
+		snprintf(ee->tmp, CCS_EXEC_TMPSIZE - 1,
+			 "pid=%d uid=%d gid=%d euid=%d egid=%d suid=%d "
+			 "sgid=%d fsuid=%d fsgid=%d", ccs_sys_getpid(),
+			 current_uid(), current_gid(), current_euid(),
+			 current_egid(), current_suid(), current_sgid(),
+			 current_fsuid(), current_fsgid());
+#endif
+		retval = ccs_copy_argv(ee->tmp, bprm);
+		if (retval < 0)
+			goto out;
+	}
+
+	/* Set argv[2] */
+	{
+		char *exe = (char *) ccs_get_exe();
+		if (exe) {
+			retval = ccs_copy_argv(exe, bprm);
+			kfree(exe);
+		} else {
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 36)
+			retval = ccs_copy_argv("<unknown>", bprm);
+#else
+			snprintf(ee->tmp, CCS_EXEC_TMPSIZE - 1, "<unknown>");
+			retval = ccs_copy_argv(ee->tmp, bprm);
+#endif
+		}
+		if (retval < 0)
+			goto out;
+	}
+
+	/* Set argv[1] */
+	{
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 36)
+		retval = ccs_copy_argv(ccs_current_domain()->domainname->name,
+				       bprm);
+#else
+		snprintf(ee->tmp, CCS_EXEC_TMPSIZE - 1, "%s",
+			 ccs_current_domain()->domainname->name);
+		retval = ccs_copy_argv(ee->tmp, bprm);
+#endif
+		if (retval < 0)
+			goto out;
+	}
+
+	/* Set argv[0] */
+	{
+		struct path root;
+		char *cp;
+		int root_len;
+		int handler_len;
+		get_fs_root(current->fs, &root);
+		cp = ccs_realpath(&root);
+		path_put(&root);
+		if (!cp) {
+			retval = -ENOMEM;
+			goto out;
+		}
+		root_len = strlen(cp);
+		retval = strncmp(ee->handler->name, cp, root_len);
+		root_len--;
+		kfree(cp);
+		if (retval) {
+			retval = -ENOENT;
+			goto out;
+		}
+		handler_len = ee->handler->total_len + 1;
+		cp = kmalloc(handler_len, CCS_GFP_FLAGS);
+		if (!cp) {
+			retval = -ENOMEM;
+			goto out;
+		}
+		/* ee->handler_path is released by ccs_finish_execve(). */
+		ee->handler_path = cp;
+		/* Adjust root directory for open_exec(). */
+		memmove(cp, ee->handler->name + root_len,
+			handler_len - root_len);
+		ccs_unescape(cp);
+		retval = -ENOENT;
+		if (*cp != '/')
+			goto out;
+		retval = ccs_copy_argv(cp, bprm);
+		if (retval < 0)
+			goto out;
+	}
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 23)
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 24)
+	bprm->argv_len = bprm->exec - bprm->p;
+#endif
+#endif
+
+	/*
+	 * OK, now restart the process with execute handler program's dentry.
+	 */
+	filp = open_exec(ee->handler_path);
+	if (IS_ERR(filp)) {
+		retval = PTR_ERR(filp);
+		goto out;
+	}
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 20)
+	ee->obj.path1 = filp->f_path;
+#else
+	ee->obj.path1.dentry = filp->f_dentry;
+	ee->obj.path1.mnt = filp->f_vfsmnt;
+#endif
+	bprm->file = filp;
+	bprm->filename = ee->handler_path;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 0)
+	bprm->interp = bprm->filename;
+#endif
+	retval = prepare_binprm(bprm);
+	if (retval < 0)
+		goto out;
+	ee->r.dont_sleep_on_enforce_error = true;
+	retval = ccs_find_next_domain(ee);
+	ee->r.dont_sleep_on_enforce_error = false;
+out:
+	return retval;
+}
+
+/**
+ * ccs_find_execute_handler - Find an execute handler.
+ *
+ * @ee:   Pointer to "struct ccs_execve".
+ * @type: Type of execute handler.
+ *
+ * Returns true if found, false otherwise.
+ *
+ * Caller holds ccs_read_lock().
+ */
+static bool ccs_find_execute_handler(struct ccs_execve *ee, const u8 type)
+{
+	struct ccs_request_info *r = &ee->r;
+	/*
+	 * To avoid infinite execute handler loop, don't use execute handler
+	 * if the current process is marked as execute handler.
+	 */
+	if (ccs_current_flags() & CCS_TASK_IS_EXECUTE_HANDLER)
+		return false;
+	r->param_type = type;
+	ccs_check_acl(r);
+	if (!r->granted)
+		return false;
+	ee->handler = container_of(r->matched_acl, struct ccs_handler_acl,
+				   head)->handler;
+	ee->transition = r->matched_acl && r->matched_acl->cond &&
+		r->matched_acl->cond->exec_transit ?
+		r->matched_acl->cond->transit : NULL;
+	return true;
+}
+
+#endif
+
+#ifdef CONFIG_MMU
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 23)
+#define CCS_BPRM_MMU
+#elif defined(RHEL_MAJOR) && RHEL_MAJOR == 5 && defined(RHEL_MINOR) && RHEL_MINOR >= 3
+#define CCS_BPRM_MMU
+#elif defined(AX_MAJOR) && AX_MAJOR == 3 && defined(AX_MINOR) && AX_MINOR >= 2
+#define CCS_BPRM_MMU
+#endif
+#endif
+
+/**
+ * ccs_dump_page - Dump a page to buffer.
+ *
+ * @bprm: Pointer to "struct linux_binprm".
+ * @pos:  Location to dump.
+ * @dump: Poiner to "struct ccs_page_dump".
+ *
+ * Returns true on success, false otherwise.
+ */
+bool ccs_dump_page(struct linux_binprm *bprm, unsigned long pos,
+		   struct ccs_page_dump *dump)
+{
+	struct page *page;
+	/* dump->data is released by ccs_start_execve(). */
+	if (!dump->data) {
+		dump->data = kzalloc(PAGE_SIZE, CCS_GFP_FLAGS);
+		if (!dump->data)
+			return false;
+	}
+	/* Same with get_arg_page(bprm, pos, 0) in fs/exec.c */
+#ifdef CCS_BPRM_MMU
+	if (get_user_pages(current, bprm->mm, pos, 1, 0, 1, &page, NULL) <= 0)
+		return false;
+#else
+	page = bprm->page[pos / PAGE_SIZE];
+#endif
+	if (page != dump->page) {
+		const unsigned int offset = pos % PAGE_SIZE;
+		/*
+		 * Maybe kmap()/kunmap() should be used here.
+		 * But remove_arg_zero() uses kmap_atomic()/kunmap_atomic().
+		 * So do I.
+		 */
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 37)
+		char *kaddr = kmap_atomic(page);
+#else
+		char *kaddr = kmap_atomic(page, KM_USER0);
+#endif
+		dump->page = page;
+		memcpy(dump->data + offset, kaddr + offset,
+		       PAGE_SIZE - offset);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 37)
+		kunmap_atomic(kaddr);
+#else
+		kunmap_atomic(kaddr, KM_USER0);
+#endif
+	}
+	/* Same with put_arg_page(page) in fs/exec.c */
+#ifdef CCS_BPRM_MMU
+	put_page(page);
+#endif
+	return true;
+}
+
+/**
+ * ccs_start_execve - Prepare for execve() operation.
+ *
+ * @bprm: Pointer to "struct linux_binprm".
+ * @eep:  Pointer to "struct ccs_execve *".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int ccs_start_execve(struct linux_binprm *bprm,
+			    struct ccs_execve **eep)
+{
+	int retval;
+	struct ccs_security *task = ccs_current_security();
+	struct ccs_execve *ee;
+	int idx;
+	*eep = NULL;
+	ee = kzalloc(sizeof(*ee), CCS_GFP_FLAGS);
+	if (!ee)
+		return -ENOMEM;
+	ee->tmp = kzalloc(CCS_EXEC_TMPSIZE, CCS_GFP_FLAGS);
+	if (!ee->tmp) {
+		kfree(ee);
+		return -ENOMEM;
+	}
+	idx = ccs_read_lock();
+	/* ee->dump->data is allocated by ccs_dump_page(). */
+	ee->previous_domain = task->ccs_domain_info;
+	/* Clear manager flag. */
+	task->ccs_flags &= ~CCS_TASK_IS_MANAGER;
+	*eep = ee;
+	ccs_init_request_info(&ee->r, CCS_MAC_FILE_EXECUTE);
+	ee->r.ee = ee;
+	ee->bprm = bprm;
+	ee->r.obj = &ee->obj;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 20)
+	ee->obj.path1 = bprm->file->f_path;
+#else
+	ee->obj.path1.dentry = bprm->file->f_dentry;
+	ee->obj.path1.mnt = bprm->file->f_vfsmnt;
+#endif
+#ifdef CONFIG_CCSECURITY_TASK_EXECUTE_HANDLER
+	/*
+	 * No need to call ccs_environ() for execute handler because envp[] is
+	 * moved to argv[].
+	 */
+	if (ccs_find_execute_handler(ee, CCS_TYPE_AUTO_EXECUTE_HANDLER)) {
+		retval = ccs_try_alt_exec(ee);
+		goto done;
+	}
+#endif
+	retval = ccs_find_next_domain(ee);
+#ifdef CONFIG_CCSECURITY_TASK_EXECUTE_HANDLER
+	if (retval == -EPERM &&
+	    ccs_find_execute_handler(ee, CCS_TYPE_DENIED_EXECUTE_HANDLER)) {
+		retval = ccs_try_alt_exec(ee);
+		goto done;
+	}
+#endif
+#ifdef CONFIG_CCSECURITY_MISC
+	if (!retval)
+		retval = ccs_environ(ee);
+#endif
+#ifdef CONFIG_CCSECURITY_TASK_EXECUTE_HANDLER
+done:
+#endif
+	ccs_read_unlock(idx);
+	kfree(ee->tmp);
+	ee->tmp = NULL;
+	kfree(ee->dump.data);
+	ee->dump.data = NULL;
+	return retval;
+}
+
+/**
+ * ccs_finish_execve - Clean up execve() operation.
+ *
+ * @retval: Return code of an execve() operation.
+ * @ee:     Pointer to "struct ccs_execve".
+ *
+ * Returns nothing.
+ */
+static void ccs_finish_execve(int retval, struct ccs_execve *ee)
+{
+	struct ccs_security *task = ccs_current_security();
+	if (!ee)
+		return;
+	if (retval < 0) {
+		task->ccs_domain_info = ee->previous_domain;
+		/*
+		 * Make task->ccs_domain_info visible to GC before changing
+		 * task->ccs_flags.
+		 */
+		smp_wmb();
+	} else {
+		/* Mark the current process as execute handler. */
+		if (ee->handler)
+			task->ccs_flags |= CCS_TASK_IS_EXECUTE_HANDLER;
+		/* Mark the current process as normal process. */
+		else
+			task->ccs_flags &= ~CCS_TASK_IS_EXECUTE_HANDLER;
+	}
+	/* Tell GC that I finished execve(). */
+	task->ccs_flags &= ~CCS_TASK_IS_IN_EXECVE;
+	kfree(ee->handler_path);
+	kfree(ee);
+}
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 8, 0)
+
+/**
+ * __ccs_search_binary_handler - Main routine for do_execve().
+ *
+ * @bprm: Pointer to "struct linux_binprm".
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Performs permission checks for do_execve() and domain transition.
+ * Domain transition by "struct ccs_domain_transition_control" and
+ * "auto_domain_transition=" parameter of "struct ccs_condition" are reverted
+ * if do_execve() failed.
+ * Garbage collector does not remove "struct ccs_domain_info" from
+ * ccs_domain_list nor kfree("struct ccs_domain_info") if the current thread is
+ * marked as CCS_TASK_IS_IN_EXECVE.
+ */
+static int __ccs_search_binary_handler(struct linux_binprm *bprm)
+{
+	struct ccs_execve *ee;
+	int retval;
+#ifndef CONFIG_CCSECURITY_OMIT_USERSPACE_LOADER
+	if (!ccs_policy_loaded)
+		ccsecurity_exports.load_policy(bprm->filename);
+#endif
+	retval = ccs_start_execve(bprm, &ee);
+	if (!retval)
+		retval = search_binary_handler(bprm);
+	ccs_finish_execve(retval, ee);
+	return retval;
+}
+
+#else
+
+/**
+ * __ccs_search_binary_handler - Main routine for do_execve().
+ *
+ * @bprm: Pointer to "struct linux_binprm".
+ * @regs: Pointer to "struct pt_regs".
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Performs permission checks for do_execve() and domain transition.
+ * Domain transition by "struct ccs_domain_transition_control" and
+ * "auto_domain_transition=" parameter of "struct ccs_condition" are reverted
+ * if do_execve() failed.
+ * Garbage collector does not remove "struct ccs_domain_info" from
+ * ccs_domain_list nor kfree("struct ccs_domain_info") if the current thread is
+ * marked as CCS_TASK_IS_IN_EXECVE.
+ */
+static int __ccs_search_binary_handler(struct linux_binprm *bprm,
+				       struct pt_regs *regs)
+{
+	struct ccs_execve *ee;
+	int retval;
+#ifndef CONFIG_CCSECURITY_OMIT_USERSPACE_LOADER
+	if (!ccs_policy_loaded)
+		ccsecurity_exports.load_policy(bprm->filename);
+#endif
+	retval = ccs_start_execve(bprm, &ee);
+	if (!retval)
+		retval = search_binary_handler(bprm, regs);
+	ccs_finish_execve(retval, ee);
+	return retval;
+}
+
+#endif
+
+/**
+ * ccs_permission_init - Register permission check hooks.
+ *
+ * Returns nothing.
+ */
+void __init ccs_permission_init(void)
+{
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 32)
+	ccsecurity_ops.save_open_mode = __ccs_save_open_mode;
+	ccsecurity_ops.clear_open_mode = __ccs_clear_open_mode;
+	ccsecurity_ops.open_permission = __ccs_open_permission;
+#else
+	ccsecurity_ops.open_permission = ccs_new_open_permission;
+#endif
+	ccsecurity_ops.fcntl_permission = __ccs_fcntl_permission;
+	ccsecurity_ops.ioctl_permission = __ccs_ioctl_permission;
+	ccsecurity_ops.chmod_permission = __ccs_chmod_permission;
+	ccsecurity_ops.chown_permission = __ccs_chown_permission;
+#ifdef CONFIG_CCSECURITY_FILE_GETATTR
+	ccsecurity_ops.getattr_permission = __ccs_getattr_permission;
+#endif
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25)
+	ccsecurity_ops.pivot_root_permission = __ccs_pivot_root_permission;
+	ccsecurity_ops.chroot_permission = __ccs_chroot_permission;
+#else
+	ccsecurity_ops.pivot_root_permission = ccs_old_pivot_root_permission;
+	ccsecurity_ops.chroot_permission = ccs_old_chroot_permission;
+#endif
+	ccsecurity_ops.umount_permission = __ccs_umount_permission;
+	ccsecurity_ops.mknod_permission = __ccs_mknod_permission;
+	ccsecurity_ops.mkdir_permission = __ccs_mkdir_permission;
+	ccsecurity_ops.rmdir_permission = __ccs_rmdir_permission;
+	ccsecurity_ops.unlink_permission = __ccs_unlink_permission;
+	ccsecurity_ops.symlink_permission = __ccs_symlink_permission;
+	ccsecurity_ops.truncate_permission = __ccs_truncate_permission;
+	ccsecurity_ops.rename_permission = __ccs_rename_permission;
+	ccsecurity_ops.link_permission = __ccs_link_permission;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 30)
+	ccsecurity_ops.open_exec_permission = __ccs_open_exec_permission;
+	ccsecurity_ops.uselib_permission = __ccs_uselib_permission;
+#endif
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 18) || (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 33) && defined(CONFIG_SYSCTL_SYSCALL))
+	ccsecurity_ops.parse_table = __ccs_parse_table;
+#endif
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25)
+	ccsecurity_ops.mount_permission = __ccs_mount_permission;
+#else
+	ccsecurity_ops.mount_permission = ccs_old_mount_permission;
+#endif
+#ifdef CONFIG_CCSECURITY_CAPABILITY
+	ccsecurity_ops.socket_create_permission =
+		__ccs_socket_create_permission;
+#endif
+#ifdef CONFIG_CCSECURITY_NETWORK
+	ccsecurity_ops.socket_listen_permission =
+		__ccs_socket_listen_permission;
+	ccsecurity_ops.socket_connect_permission =
+		__ccs_socket_connect_permission;
+	ccsecurity_ops.socket_bind_permission = __ccs_socket_bind_permission;
+	ccsecurity_ops.socket_post_accept_permission =
+		__ccs_socket_post_accept_permission;
+	ccsecurity_ops.socket_sendmsg_permission =
+		__ccs_socket_sendmsg_permission;
+#endif
+#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG
+	ccsecurity_ops.socket_post_recvmsg_permission =
+		__ccs_socket_post_recvmsg_permission;
+#endif
+#ifdef CONFIG_CCSECURITY_IPC
+	ccsecurity_ops.kill_permission = ccs_signal_acl;
+	ccsecurity_ops.tgkill_permission = ccs_signal_acl0;
+	ccsecurity_ops.tkill_permission = ccs_signal_acl;
+	ccsecurity_ops.sigqueue_permission = ccs_signal_acl;
+	ccsecurity_ops.tgsigqueue_permission = ccs_signal_acl0;
+#endif
+#ifdef CONFIG_CCSECURITY_CAPABILITY
+	ccsecurity_ops.capable = __ccs_capable;
+	ccsecurity_ops.ptrace_permission = __ccs_ptrace_permission;
+#endif
+	ccsecurity_ops.search_binary_handler = __ccs_search_binary_handler;
+}
+
+/**
+ * ccs_kern_path - Wrapper for kern_path().
+ *
+ * @pathname: Pathname to resolve. Maybe NULL.
+ * @flags:    Lookup flags.
+ * @path:     Pointer to "struct path".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int ccs_kern_path(const char *pathname, int flags, struct path *path)
+{
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 28)
+	if (!pathname || kern_path(pathname, flags, path))
+		return -ENOENT;
+#else
+	struct nameidata nd;
+	if (!pathname || path_lookup(pathname, flags, &nd))
+		return -ENOENT;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25)
+	*path = nd.path;
+#else
+	path->dentry = nd.dentry;
+	path->mnt = nd.mnt;
+#endif
+#endif
+	return 0;
+}
+
+/**
+ * ccs_get_path - Get dentry/vfsmmount of a pathname.
+ *
+ * @pathname: The pathname to solve. Maybe NULL.
+ * @path:     Pointer to "struct path".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int ccs_get_path(const char *pathname, struct path *path)
+{
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 0)
+	return ccs_kern_path(pathname, LOOKUP_FOLLOW, path);
+#else
+	return ccs_kern_path(pathname, LOOKUP_FOLLOW | LOOKUP_POSITIVE, path);
+#endif
+}
+
+/**
+ * ccs_symlink_path - Get symlink's pathname.
+ *
+ * @pathname: The pathname to solve. Maybe NULL.
+ * @name:     Pointer to "struct ccs_path_info".
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * This function uses kzalloc(), so caller must kfree() if this function
+ * didn't return NULL.
+ */
+static int ccs_symlink_path(const char *pathname, struct ccs_path_info *name)
+{
+	char *buf;
+	struct path path;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 0)
+	if (ccs_kern_path(pathname, 0, &path))
+		return -ENOENT;
+#else
+	if (ccs_kern_path(pathname, LOOKUP_POSITIVE, &path))
+		return -ENOENT;
+#endif
+	buf = ccs_realpath(&path);
+	path_put(&path);
+	if (buf) {
+		name->name = buf;
+		ccs_fill_path_info(name);
+		return 0;
+	}
+	return -ENOMEM;
+}
+
+/**
+ * ccs_check_mount_acl - Check permission for path path path number operation.
+ *
+ * @r:   Pointer to "struct ccs_request_info".
+ * @ptr: Pointer to "struct ccs_acl_info".
+ *
+ * Returns true if granted, false otherwise.
+ */
+static bool ccs_check_mount_acl(struct ccs_request_info *r,
+				const struct ccs_acl_info *ptr)
+{
+	const struct ccs_mount_acl *acl =
+		container_of(ptr, typeof(*acl), head);
+	return ccs_compare_number_union(r->param.mount.flags, &acl->flags) &&
+		ccs_compare_name_union(r->param.mount.type, &acl->fs_type) &&
+		ccs_compare_name_union(r->param.mount.dir, &acl->dir_name) &&
+		(!r->param.mount.need_dev ||
+		 ccs_compare_name_union(r->param.mount.dev, &acl->dev_name));
+}
+
+/**
+ * ccs_mount_acl - Check permission for mount() operation.
+ *
+ * @r:        Pointer to "struct ccs_request_info".
+ * @dev_name: Name of device file. Maybe NULL.
+ * @dir:      Pointer to "struct path".
+ * @type:     Name of filesystem type.
+ * @flags:    Mount options.
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds ccs_read_lock().
+ */
+static int ccs_mount_acl(struct ccs_request_info *r, const char *dev_name,
+			 struct path *dir, const char *type,
+			 unsigned long flags)
+{
+	struct ccs_obj_info obj = { };
+	struct file_system_type *fstype = NULL;
+	const char *requested_type = NULL;
+	const char *requested_dir_name = NULL;
+	const char *requested_dev_name = NULL;
+	struct ccs_path_info rtype;
+	struct ccs_path_info rdev;
+	struct ccs_path_info rdir;
+	int need_dev = 0;
+	int error = -ENOMEM;
+	r->obj = &obj;
+
+	/* Get fstype. */
+	requested_type = ccs_encode(type);
+	if (!requested_type)
+		goto out;
+	rtype.name = requested_type;
+	ccs_fill_path_info(&rtype);
+
+	/* Get mount point. */
+	obj.path2 = *dir;
+	requested_dir_name = ccs_realpath(dir);
+	if (!requested_dir_name) {
+		error = -ENOMEM;
+		goto out;
+	}
+	rdir.name = requested_dir_name;
+	ccs_fill_path_info(&rdir);
+
+	/* Compare fs name. */
+	if (type == ccs_mounts[CCS_MOUNT_REMOUNT]) {
+		/* dev_name is ignored. */
+	} else if (type == ccs_mounts[CCS_MOUNT_MAKE_UNBINDABLE] ||
+		   type == ccs_mounts[CCS_MOUNT_MAKE_PRIVATE] ||
+		   type == ccs_mounts[CCS_MOUNT_MAKE_SLAVE] ||
+		   type == ccs_mounts[CCS_MOUNT_MAKE_SHARED]) {
+		/* dev_name is ignored. */
+	} else if (type == ccs_mounts[CCS_MOUNT_BIND] ||
+		   type == ccs_mounts[CCS_MOUNT_MOVE]) {
+		need_dev = -1; /* dev_name is a directory */
+	} else {
+		fstype = get_fs_type(type);
+		if (!fstype) {
+			error = -ENODEV;
+			goto out;
+		}
+		if (fstype->fs_flags & FS_REQUIRES_DEV)
+			/* dev_name is a block device file. */
+			need_dev = 1;
+	}
+	if (need_dev) {
+		/* Get mount point or device file. */
+		if (ccs_get_path(dev_name, &obj.path1)) {
+			error = -ENOENT;
+			goto out;
+		}
+		requested_dev_name = ccs_realpath(&obj.path1);
+		if (!requested_dev_name) {
+			error = -ENOENT;
+			goto out;
+		}
+	} else {
+		/* Map dev_name to "<NULL>" if no dev_name given. */
+		if (!dev_name)
+			dev_name = "<NULL>";
+		requested_dev_name = ccs_encode(dev_name);
+		if (!requested_dev_name) {
+			error = -ENOMEM;
+			goto out;
+		}
+	}
+	rdev.name = requested_dev_name;
+	ccs_fill_path_info(&rdev);
+	r->param_type = CCS_TYPE_MOUNT_ACL;
+	r->param.mount.need_dev = need_dev;
+	r->param.mount.dev = &rdev;
+	r->param.mount.dir = &rdir;
+	r->param.mount.type = &rtype;
+	r->param.mount.flags = flags;
+	error = ccs_check_acl(r);
+out:
+	kfree(requested_dev_name);
+	kfree(requested_dir_name);
+	if (fstype)
+		ccs_put_filesystem(fstype);
+	kfree(requested_type);
+	/* Drop refcount obtained by ccs_get_path(). */
+	if (obj.path1.dentry)
+		path_put(&obj.path1);
+	return error;
+}
+
+/**
+ * __ccs_mount_permission - Check permission for mount() operation.
+ *
+ * @dev_name:  Name of device file. Maybe NULL.
+ * @path:      Pointer to "struct path".
+ * @type:      Name of filesystem type. Maybe NULL.
+ * @flags:     Mount options.
+ * @data_page: Optional data. Maybe NULL.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int __ccs_mount_permission(const char *dev_name, struct path *path,
+				  const char *type, unsigned long flags,
+				  void *data_page)
+{
+	struct ccs_request_info r;
+	int error = 0;
+	int idx;
+	if ((flags & MS_MGC_MSK) == MS_MGC_VAL)
+		flags &= ~MS_MGC_MSK;
+	if (flags & MS_REMOUNT) {
+		type = ccs_mounts[CCS_MOUNT_REMOUNT];
+		flags &= ~MS_REMOUNT;
+	} else if (flags & MS_BIND) {
+		type = ccs_mounts[CCS_MOUNT_BIND];
+		flags &= ~MS_BIND;
+	} else if (flags & MS_SHARED) {
+		if (flags & (MS_PRIVATE | MS_SLAVE | MS_UNBINDABLE))
+			return -EINVAL;
+		type = ccs_mounts[CCS_MOUNT_MAKE_SHARED];
+		flags &= ~MS_SHARED;
+	} else if (flags & MS_PRIVATE) {
+		if (flags & (MS_SHARED | MS_SLAVE | MS_UNBINDABLE))
+			return -EINVAL;
+		type = ccs_mounts[CCS_MOUNT_MAKE_PRIVATE];
+		flags &= ~MS_PRIVATE;
+	} else if (flags & MS_SLAVE) {
+		if (flags & (MS_SHARED | MS_PRIVATE | MS_UNBINDABLE))
+			return -EINVAL;
+		type = ccs_mounts[CCS_MOUNT_MAKE_SLAVE];
+		flags &= ~MS_SLAVE;
+	} else if (flags & MS_UNBINDABLE) {
+		if (flags & (MS_SHARED | MS_PRIVATE | MS_SLAVE))
+			return -EINVAL;
+		type = ccs_mounts[CCS_MOUNT_MAKE_UNBINDABLE];
+		flags &= ~MS_UNBINDABLE;
+	} else if (flags & MS_MOVE) {
+		type = ccs_mounts[CCS_MOUNT_MOVE];
+		flags &= ~MS_MOVE;
+	}
+	if (!type)
+		type = "<NULL>";
+	idx = ccs_read_lock();
+	if (ccs_init_request_info(&r, CCS_MAC_FILE_MOUNT)
+	    != CCS_CONFIG_DISABLED)
+		error = ccs_mount_acl(&r, dev_name, path, type, flags);
+	ccs_read_unlock(idx);
+	return error;
+}
+
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 24)
+
+/**
+ * ccs_old_mount_permission - Check permission for mount() operation.
+ *
+ * @dev_name:  Name of device file.
+ * @nd:        Pointer to "struct nameidata".
+ * @type:      Name of filesystem type. Maybe NULL.
+ * @flags:     Mount options.
+ * @data_page: Optional data. Maybe NULL.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int ccs_old_mount_permission(const char *dev_name, struct nameidata *nd,
+				    const char *type, unsigned long flags,
+				    void *data_page)
+{
+	struct path path = { nd->mnt, nd->dentry };
+	return __ccs_mount_permission(dev_name, &path, type, flags, data_page);
+}
+
+#endif
+
+/**
+ * ccs_compare_number_union - Check whether a value matches "struct ccs_number_union" or not.
+ *
+ * @value: Number to check.
+ * @ptr:   Pointer to "struct ccs_number_union".
+ *
+ * Returns true if @value matches @ptr, false otherwise.
+ */
+static bool ccs_compare_number_union(const unsigned long value,
+				     const struct ccs_number_union *ptr)
+{
+	if (ptr->group)
+		return ccs_number_matches_group(value, value, ptr->group);
+	return value >= ptr->values[0] && value <= ptr->values[1];
+}
+
+/**
+ * ccs_compare_name_union - Check whether a name matches "struct ccs_name_union" or not.
+ *
+ * @name: Pointer to "struct ccs_path_info".
+ * @ptr:  Pointer to "struct ccs_name_union".
+ *
+ * Returns "struct ccs_path_info" if @name matches @ptr, NULL otherwise.
+ */
+static const struct ccs_path_info *ccs_compare_name_union
+(const struct ccs_path_info *name, const struct ccs_name_union *ptr)
+{
+	if (ptr->group)
+		return ccs_path_matches_group(name, ptr->group);
+	if (ccs_path_matches_pattern(name, ptr->filename))
+		return ptr->filename;
+	return NULL;
+}
+
+/**
+ * ccs_add_slash - Add trailing '/' if needed.
+ *
+ * @buf: Pointer to "struct ccs_path_info".
+ *
+ * Returns nothing.
+ *
+ * @buf must be generated by ccs_encode() because this function does not
+ * allocate memory for adding '/'.
+ */
+static void ccs_add_slash(struct ccs_path_info *buf)
+{
+	if (buf->is_dir)
+		return;
+	/* This is OK because ccs_encode() reserves space for appending "/". */
+	strcat((char *) buf->name, "/");
+	ccs_fill_path_info(buf);
+}
+
+/**
+ * ccs_get_realpath - Get realpath.
+ *
+ * @buf:  Pointer to "struct ccs_path_info".
+ * @path: Pointer to "struct path". @path->mnt may be NULL.
+ *
+ * Returns true on success, false otherwise.
+ */
+static bool ccs_get_realpath(struct ccs_path_info *buf, struct path *path)
+{
+	buf->name = ccs_realpath(path);
+	if (buf->name) {
+		ccs_fill_path_info(buf);
+		return true;
+	}
+	return false;
+}
+
+/**
+ * ccs_check_path_acl - Check permission for path operation.
+ *
+ * @r:   Pointer to "struct ccs_request_info".
+ * @ptr: Pointer to "struct ccs_acl_info".
+ *
+ * Returns true if granted, false otherwise.
+ *
+ * To be able to use wildcard for domain transition, this function sets
+ * matching entry on success. Since the caller holds ccs_read_lock(),
+ * it is safe to set matching entry.
+ */
+static bool ccs_check_path_acl(struct ccs_request_info *r,
+			       const struct ccs_acl_info *ptr)
+{
+	const struct ccs_path_acl *acl = container_of(ptr, typeof(*acl), head);
+	if (ptr->perm & (1 << r->param.path.operation)) {
+		r->param.path.matched_path =
+			ccs_compare_name_union(r->param.path.filename,
+					       &acl->name);
+		return r->param.path.matched_path != NULL;
+	}
+	return false;
+}
+
+/**
+ * ccs_check_path_number_acl - Check permission for path number operation.
+ *
+ * @r:   Pointer to "struct ccs_request_info".
+ * @ptr: Pointer to "struct ccs_acl_info".
+ *
+ * Returns true if granted, false otherwise.
+ */
+static bool ccs_check_path_number_acl(struct ccs_request_info *r,
+				      const struct ccs_acl_info *ptr)
+{
+	const struct ccs_path_number_acl *acl =
+		container_of(ptr, typeof(*acl), head);
+	return (ptr->perm & (1 << r->param.path_number.operation)) &&
+		ccs_compare_number_union(r->param.path_number.number,
+					 &acl->number) &&
+		ccs_compare_name_union(r->param.path_number.filename,
+				       &acl->name);
+}
+
+/**
+ * ccs_check_path2_acl - Check permission for path path operation.
+ *
+ * @r:   Pointer to "struct ccs_request_info".
+ * @ptr: Pointer to "struct ccs_acl_info".
+ *
+ * Returns true if granted, false otherwise.
+ */
+static bool ccs_check_path2_acl(struct ccs_request_info *r,
+				const struct ccs_acl_info *ptr)
+{
+	const struct ccs_path2_acl *acl =
+		container_of(ptr, typeof(*acl), head);
+	return (ptr->perm & (1 << r->param.path2.operation)) &&
+		ccs_compare_name_union(r->param.path2.filename1, &acl->name1)
+		&& ccs_compare_name_union(r->param.path2.filename2,
+					  &acl->name2);
+}
+
+/**
+ * ccs_check_mkdev_acl - Check permission for path number number number operation.
+ *
+ * @r:   Pointer to "struct ccs_request_info".
+ * @ptr: Pointer to "struct ccs_acl_info".
+ *
+ * Returns true if granted, false otherwise.
+ */
+static bool ccs_check_mkdev_acl(struct ccs_request_info *r,
+				const struct ccs_acl_info *ptr)
+{
+	const struct ccs_mkdev_acl *acl =
+		container_of(ptr, typeof(*acl), head);
+	return (ptr->perm & (1 << r->param.mkdev.operation)) &&
+		ccs_compare_number_union(r->param.mkdev.mode, &acl->mode) &&
+		ccs_compare_number_union(r->param.mkdev.major, &acl->major) &&
+		ccs_compare_number_union(r->param.mkdev.minor, &acl->minor) &&
+		ccs_compare_name_union(r->param.mkdev.filename, &acl->name);
+}
+
+/**
+ * ccs_path_permission - Check permission for path operation.
+ *
+ * @r:         Pointer to "struct ccs_request_info".
+ * @operation: Type of operation.
+ * @filename:  Filename to check.
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds ccs_read_lock().
+ */
+static int ccs_path_permission(struct ccs_request_info *r, u8 operation,
+			       const struct ccs_path_info *filename)
+{
+	r->type = ccs_p2mac[operation];
+	r->mode = ccs_get_mode(r->profile, r->type);
+	if (r->mode == CCS_CONFIG_DISABLED)
+		return 0;
+	r->param_type = CCS_TYPE_PATH_ACL;
+	r->param.path.filename = filename;
+	r->param.path.operation = operation;
+	return ccs_check_acl(r);
+}
+
+/**
+ * ccs_execute_permission - Check permission for execute operation.
+ *
+ * @r:         Pointer to "struct ccs_request_info".
+ * @filename:  Filename to check.
+ *
+ * Returns 0 on success, CCS_RETRY_REQUEST on retry, negative value otherwise.
+ *
+ * Caller holds ccs_read_lock().
+ */
+static int ccs_execute_permission(struct ccs_request_info *r,
+				  const struct ccs_path_info *filename)
+{
+	int error;
+	/*
+	 * Unlike other permission checks, this check is done regardless of
+	 * profile mode settings in order to check for domain transition
+	 * preference.
+	 */
+	r->type = CCS_MAC_FILE_EXECUTE;
+	r->mode = ccs_get_mode(r->profile, r->type);
+	r->param_type = CCS_TYPE_PATH_ACL;
+	r->param.path.filename = filename;
+	r->param.path.operation = CCS_TYPE_EXECUTE;
+	error = ccs_check_acl(r);
+	r->ee->transition = r->matched_acl && r->matched_acl->cond &&
+		r->matched_acl->cond->exec_transit ?
+		r->matched_acl->cond->transit : NULL;
+	return error;
+}
+
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 32)
+
+/**
+ * __ccs_save_open_mode - Remember original flags passed to sys_open().
+ *
+ * @mode: Flags passed to sys_open().
+ *
+ * Returns nothing.
+ *
+ * TOMOYO does not check "file write" if open(path, O_TRUNC | O_RDONLY) was
+ * requested because write() is not permitted. Instead, TOMOYO checks
+ * "file truncate" if O_TRUNC is passed.
+ *
+ * TOMOYO does not check "file read" and "file write" if open(path, 3) was
+ * requested because read()/write() are not permitted. Instead, TOMOYO checks
+ * "file ioctl" when ioctl() is requested.
+ */
+static void __ccs_save_open_mode(int mode)
+{
+	if ((mode & 3) == 3)
+		ccs_current_security()->ccs_flags |= CCS_OPEN_FOR_IOCTL_ONLY;
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 14)
+	/* O_TRUNC passes MAY_WRITE to ccs_open_permission(). */
+	else if (!(mode & 3) && (mode & O_TRUNC))
+		ccs_current_security()->ccs_flags |=
+			CCS_OPEN_FOR_READ_TRUNCATE;
+#endif
+}
+
+/**
+ * __ccs_clear_open_mode - Forget original flags passed to sys_open().
+ *
+ * Returns nothing.
+ */
+static void __ccs_clear_open_mode(void)
+{
+	ccs_current_security()->ccs_flags &= ~(CCS_OPEN_FOR_IOCTL_ONLY |
+					       CCS_OPEN_FOR_READ_TRUNCATE);
+}
+
+#endif
+
+/**
+ * __ccs_open_permission - Check permission for "read" and "write".
+ *
+ * @dentry: Pointer to "struct dentry".
+ * @mnt:    Pointer to "struct vfsmount". Maybe NULL.
+ * @flag:   Flags for open().
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int __ccs_open_permission(struct dentry *dentry, struct vfsmount *mnt,
+				 const int flag)
+{
+	struct ccs_request_info r;
+	struct ccs_obj_info obj = {
+		.path1.dentry = dentry,
+		.path1.mnt = mnt,
+	};
+	const u32 ccs_flags = ccs_current_flags();
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 33)
+	const u8 acc_mode = (flag & 3) == 3 ? 0 : ACC_MODE(flag);
+#else
+	const u8 acc_mode = (ccs_flags & CCS_OPEN_FOR_IOCTL_ONLY) ? 0 :
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 14)
+		(ccs_flags & CCS_OPEN_FOR_READ_TRUNCATE) ? 4 :
+#endif
+		ACC_MODE(flag);
+#endif
+	int error = 0;
+	struct ccs_path_info buf;
+	int idx;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 30)
+	if (current->in_execve && !(ccs_flags & CCS_TASK_IS_IN_EXECVE))
+		return 0;
+#endif
+#ifndef CONFIG_CCSECURITY_FILE_READDIR
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 1, 0)
+	if (d_is_dir(dentry))
+		return 0;
+#else
+	if (dentry->d_inode && S_ISDIR(dentry->d_inode->i_mode))
+		return 0;
+#endif
+#endif
+	buf.name = NULL;
+	r.mode = CCS_CONFIG_DISABLED;
+	idx = ccs_read_lock();
+	if (acc_mode && ccs_init_request_info(&r, CCS_MAC_FILE_OPEN)
+	    != CCS_CONFIG_DISABLED) {
+		if (!ccs_get_realpath(&buf, &obj.path1)) {
+			error = -ENOMEM;
+			goto out;
+		}
+		r.obj = &obj;
+		if (acc_mode & MAY_READ)
+			error = ccs_path_permission(&r, CCS_TYPE_READ, &buf);
+		if (!error && (acc_mode & MAY_WRITE))
+			error = ccs_path_permission(&r, (flag & O_APPEND) ?
+						    CCS_TYPE_APPEND :
+						    CCS_TYPE_WRITE, &buf);
+	}
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 32)
+	if (!error && (flag & O_TRUNC) &&
+	    ccs_init_request_info(&r, CCS_MAC_FILE_TRUNCATE)
+	    != CCS_CONFIG_DISABLED) {
+		if (!buf.name && !ccs_get_realpath(&buf, &obj.path1)) {
+			error = -ENOMEM;
+			goto out;
+		}
+		r.obj = &obj;
+		error = ccs_path_permission(&r, CCS_TYPE_TRUNCATE, &buf);
+	}
+#endif
+out:
+	kfree(buf.name);
+	ccs_read_unlock(idx);
+	if (r.mode != CCS_CONFIG_ENFORCING)
+		error = 0;
+	return error;
+}
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 33)
+
+/**
+ * ccs_new_open_permission - Check permission for "read" and "write".
+ *
+ * @filp: Pointer to "struct file".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int ccs_new_open_permission(struct file *filp)
+{
+	return __ccs_open_permission(filp->f_path.dentry, filp->f_path.mnt,
+				     filp->f_flags);
+}
+
+#endif
+
+/**
+ * ccs_path_perm - Check permission for "unlink", "rmdir", "truncate", "symlink", "append", "getattr", "chroot" and "unmount".
+ *
+ * @operation: Type of operation.
+ * @dentry:    Pointer to "struct dentry".
+ * @mnt:       Pointer to "struct vfsmount". Maybe NULL.
+ * @target:    Symlink's target if @operation is CCS_TYPE_SYMLINK,
+ *             NULL otherwise.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int ccs_path_perm(const u8 operation, struct dentry *dentry,
+			 struct vfsmount *mnt, const char *target)
+{
+	struct ccs_request_info r;
+	struct ccs_obj_info obj = {
+		.path1.dentry = dentry,
+		.path1.mnt = mnt,
+	};
+	int error = 0;
+	struct ccs_path_info buf;
+	bool is_enforce = false;
+	struct ccs_path_info symlink_target;
+	int idx;
+	buf.name = NULL;
+	symlink_target.name = NULL;
+	idx = ccs_read_lock();
+	if (ccs_init_request_info(&r, ccs_p2mac[operation])
+	    == CCS_CONFIG_DISABLED)
+		goto out;
+	is_enforce = (r.mode == CCS_CONFIG_ENFORCING);
+	error = -ENOMEM;
+	if (!ccs_get_realpath(&buf, &obj.path1))
+		goto out;
+	r.obj = &obj;
+	switch (operation) {
+	case CCS_TYPE_RMDIR:
+	case CCS_TYPE_CHROOT:
+		ccs_add_slash(&buf);
+		break;
+	case CCS_TYPE_SYMLINK:
+		symlink_target.name = ccs_encode(target);
+		if (!symlink_target.name)
+			goto out;
+		ccs_fill_path_info(&symlink_target);
+		obj.symlink_target = &symlink_target;
+		break;
+	}
+	error = ccs_path_permission(&r, operation, &buf);
+	if (operation == CCS_TYPE_SYMLINK)
+		kfree(symlink_target.name);
+out:
+	kfree(buf.name);
+	ccs_read_unlock(idx);
+	if (!is_enforce)
+		error = 0;
+	return error;
+}
+
+/**
+ * ccs_mkdev_perm - Check permission for "mkblock" and "mkchar".
+ *
+ * @operation: Type of operation. (CCS_TYPE_MKCHAR or CCS_TYPE_MKBLOCK)
+ * @dentry:    Pointer to "struct dentry".
+ * @mnt:       Pointer to "struct vfsmount". Maybe NULL.
+ * @mode:      Create mode.
+ * @dev:       Device number.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int ccs_mkdev_perm(const u8 operation, struct dentry *dentry,
+			  struct vfsmount *mnt, const unsigned int mode,
+			  unsigned int dev)
+{
+	struct ccs_request_info r;
+	struct ccs_obj_info obj = {
+		.path1.dentry = dentry,
+		.path1.mnt = mnt,
+	};
+	int error = 0;
+	struct ccs_path_info buf;
+	bool is_enforce = false;
+	int idx;
+	idx = ccs_read_lock();
+	if (ccs_init_request_info(&r, ccs_pnnn2mac[operation])
+	    == CCS_CONFIG_DISABLED)
+		goto out;
+	is_enforce = (r.mode == CCS_CONFIG_ENFORCING);
+	error = -EPERM;
+	if (!capable(CAP_MKNOD))
+		goto out;
+	error = -ENOMEM;
+	if (!ccs_get_realpath(&buf, &obj.path1))
+		goto out;
+	r.obj = &obj;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 0)
+	dev = new_decode_dev(dev);
+#endif
+	r.param_type = CCS_TYPE_MKDEV_ACL;
+	r.param.mkdev.filename = &buf;
+	r.param.mkdev.operation = operation;
+	r.param.mkdev.mode = mode;
+	r.param.mkdev.major = MAJOR(dev);
+	r.param.mkdev.minor = MINOR(dev);
+	error = ccs_check_acl(&r);
+	kfree(buf.name);
+out:
+	ccs_read_unlock(idx);
+	if (!is_enforce)
+		error = 0;
+	return error;
+}
+
+/**
+ * ccs_path2_perm - Check permission for "rename", "link" and "pivot_root".
+ *
+ * @operation: Type of operation.
+ * @dentry1:   Pointer to "struct dentry".
+ * @mnt1:      Pointer to "struct vfsmount". Maybe NULL.
+ * @dentry2:   Pointer to "struct dentry".
+ * @mnt2:      Pointer to "struct vfsmount". Maybe NULL.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int ccs_path2_perm(const u8 operation, struct dentry *dentry1,
+			  struct vfsmount *mnt1, struct dentry *dentry2,
+			  struct vfsmount *mnt2)
+{
+	struct ccs_request_info r;
+	int error = 0;
+	struct ccs_path_info buf1;
+	struct ccs_path_info buf2;
+	bool is_enforce = false;
+	struct ccs_obj_info obj = {
+		.path1.dentry = dentry1,
+		.path1.mnt = mnt1,
+		.path2.dentry = dentry2,
+		.path2.mnt = mnt2,
+	};
+	int idx;
+	buf1.name = NULL;
+	buf2.name = NULL;
+	idx = ccs_read_lock();
+	if (ccs_init_request_info(&r, ccs_pp2mac[operation])
+	    == CCS_CONFIG_DISABLED)
+		goto out;
+	is_enforce = (r.mode == CCS_CONFIG_ENFORCING);
+	error = -ENOMEM;
+	if (!ccs_get_realpath(&buf1, &obj.path1) ||
+	    !ccs_get_realpath(&buf2, &obj.path2))
+		goto out;
+	switch (operation) {
+	case CCS_TYPE_RENAME:
+	case CCS_TYPE_LINK:
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 1, 0)
+		if (!d_is_dir(dentry1))
+			break;
+#else
+		if (!dentry1->d_inode || !S_ISDIR(dentry1->d_inode->i_mode))
+			break;
+#endif
+		/* fall through */
+	case CCS_TYPE_PIVOT_ROOT:
+		ccs_add_slash(&buf1);
+		ccs_add_slash(&buf2);
+		break;
+	}
+	r.obj = &obj;
+	r.param_type = CCS_TYPE_PATH2_ACL;
+	r.param.path2.operation = operation;
+	r.param.path2.filename1 = &buf1;
+	r.param.path2.filename2 = &buf2;
+	error = ccs_check_acl(&r);
+out:
+	kfree(buf1.name);
+	kfree(buf2.name);
+	ccs_read_unlock(idx);
+	if (!is_enforce)
+		error = 0;
+	return error;
+}
+
+/**
+ * ccs_path_number_perm - Check permission for "create", "mkdir", "mkfifo", "mksock", "ioctl", "chmod", "chown", "chgrp".
+ *
+ * @type:   Type of operation.
+ * @dentry: Pointer to "struct dentry".
+ * @vfsmnt: Pointer to "struct vfsmount". Maybe NULL.
+ * @number: Number.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int ccs_path_number_perm(const u8 type, struct dentry *dentry,
+				struct vfsmount *vfsmnt, unsigned long number)
+{
+	struct ccs_request_info r;
+	struct ccs_obj_info obj = {
+		.path1.dentry = dentry,
+		.path1.mnt = vfsmnt,
+	};
+	int error = 0;
+	struct ccs_path_info buf;
+	int idx;
+	if (!dentry)
+		return 0;
+	idx = ccs_read_lock();
+	if (ccs_init_request_info(&r, ccs_pn2mac[type]) == CCS_CONFIG_DISABLED)
+		goto out;
+	error = -ENOMEM;
+	if (!ccs_get_realpath(&buf, &obj.path1))
+		goto out;
+	r.obj = &obj;
+	if (type == CCS_TYPE_MKDIR)
+		ccs_add_slash(&buf);
+	r.param_type = CCS_TYPE_PATH_NUMBER_ACL;
+	r.param.path_number.operation = type;
+	r.param.path_number.filename = &buf;
+	r.param.path_number.number = number;
+	error = ccs_check_acl(&r);
+	kfree(buf.name);
+out:
+	ccs_read_unlock(idx);
+	if (r.mode != CCS_CONFIG_ENFORCING)
+		error = 0;
+	return error;
+}
+
+/**
+ * __ccs_ioctl_permission - Check permission for "ioctl".
+ *
+ * @filp: Pointer to "struct file".
+ * @cmd:  Ioctl command number.
+ * @arg:  Param for @cmd.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int __ccs_ioctl_permission(struct file *filp, unsigned int cmd,
+				  unsigned long arg)
+{
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 20)
+	return ccs_path_number_perm(CCS_TYPE_IOCTL, filp->f_path.dentry,
+				    filp->f_path.mnt, cmd);
+#else
+	return ccs_path_number_perm(CCS_TYPE_IOCTL, filp->f_dentry,
+				    filp->f_vfsmnt, cmd);
+#endif
+}
+
+/**
+ * __ccs_chmod_permission - Check permission for "chmod".
+ *
+ * @dentry: Pointer to "struct dentry".
+ * @vfsmnt: Pointer to "struct vfsmount". Maybe NULL.
+ * @mode:   Mode.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int __ccs_chmod_permission(struct dentry *dentry,
+				  struct vfsmount *vfsmnt, mode_t mode)
+{
+	return ccs_path_number_perm(CCS_TYPE_CHMOD, dentry, vfsmnt,
+				    mode & S_IALLUGO);
+}
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 5, 0)
+
+/**
+ * __ccs_chown_permission - Check permission for "chown/chgrp".
+ *
+ * @dentry: Pointer to "struct dentry".
+ * @vfsmnt: Pointer to "struct vfsmount". Maybe NULL.
+ * @user:   User ID.
+ * @group:  Group ID.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int __ccs_chown_permission(struct dentry *dentry,
+				  struct vfsmount *vfsmnt, kuid_t user,
+				  kgid_t group)
+{
+	int error = 0;
+	if (uid_valid(user))
+		error = ccs_path_number_perm(CCS_TYPE_CHOWN, dentry, vfsmnt,
+					     from_kuid(&init_user_ns, user));
+	if (!error && gid_valid(group))
+		error = ccs_path_number_perm(CCS_TYPE_CHGRP, dentry, vfsmnt,
+					     from_kgid(&init_user_ns, group));
+	return error;
+}
+
+#else
+
+/**
+ * __ccs_chown_permission - Check permission for "chown/chgrp".
+ *
+ * @dentry: Pointer to "struct dentry".
+ * @vfsmnt: Pointer to "struct vfsmount". Maybe NULL.
+ * @user:   User ID.
+ * @group:  Group ID.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int __ccs_chown_permission(struct dentry *dentry,
+				  struct vfsmount *vfsmnt, uid_t user,
+				  gid_t group)
+{
+	int error = 0;
+	if (user == (uid_t) -1 && group == (gid_t) -1)
+		return 0;
+	if (user != (uid_t) -1)
+		error = ccs_path_number_perm(CCS_TYPE_CHOWN, dentry, vfsmnt,
+					     user);
+	if (!error && group != (gid_t) -1)
+		error = ccs_path_number_perm(CCS_TYPE_CHGRP, dentry, vfsmnt,
+					     group);
+	return error;
+}
+
+#endif
+
+/**
+ * __ccs_fcntl_permission - Check permission for changing O_APPEND flag.
+ *
+ * @file: Pointer to "struct file".
+ * @cmd:  Command number.
+ * @arg:  Value for @cmd.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int __ccs_fcntl_permission(struct file *file, unsigned int cmd,
+				  unsigned long arg)
+{
+	if (!(cmd == F_SETFL && ((arg ^ file->f_flags) & O_APPEND)))
+		return 0;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 33)
+	return __ccs_open_permission(file->f_path.dentry, file->f_path.mnt,
+				     O_WRONLY | (arg & O_APPEND));
+#elif defined(RHEL_MAJOR) && RHEL_MAJOR == 6
+	return __ccs_open_permission(file->f_dentry, file->f_vfsmnt,
+				     O_WRONLY | (arg & O_APPEND));
+#else
+	return __ccs_open_permission(file->f_dentry, file->f_vfsmnt,
+				     (O_WRONLY + 1) | (arg & O_APPEND));
+#endif
+}
+
+/**
+ * __ccs_pivot_root_permission - Check permission for pivot_root().
+ *
+ * @old_path: Pointer to "struct path".
+ * @new_path: Pointer to "struct path".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int __ccs_pivot_root_permission(struct path *old_path,
+				       struct path *new_path)
+{
+	return ccs_path2_perm(CCS_TYPE_PIVOT_ROOT, new_path->dentry,
+			      new_path->mnt, old_path->dentry, old_path->mnt);
+}
+
+/**
+ * __ccs_chroot_permission - Check permission for chroot().
+ *
+ * @path: Pointer to "struct path".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int __ccs_chroot_permission(struct path *path)
+{
+	return ccs_path_perm(CCS_TYPE_CHROOT, path->dentry, path->mnt, NULL);
+}
+
+/**
+ * __ccs_umount_permission - Check permission for unmount.
+ *
+ * @mnt:   Pointer to "struct vfsmount".
+ * @flags: Unused.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int __ccs_umount_permission(struct vfsmount *mnt, int flags)
+{
+	return ccs_path_perm(CCS_TYPE_UMOUNT, mnt->mnt_root, mnt, NULL);
+}
+
+/**
+ * __ccs_mknod_permission - Check permission for vfs_mknod().
+ *
+ * @dentry: Pointer to "struct dentry".
+ * @mnt:    Pointer to "struct vfsmount". Maybe NULL.
+ * @mode:   Device type and permission.
+ * @dev:    Device number for block or character device.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int __ccs_mknod_permission(struct dentry *dentry, struct vfsmount *mnt,
+				  const unsigned int mode, unsigned int dev)
+{
+	int error = 0;
+	const unsigned int perm = mode & S_IALLUGO;
+	switch (mode & S_IFMT) {
+	case S_IFCHR:
+		error = ccs_mkdev_perm(CCS_TYPE_MKCHAR, dentry, mnt, perm,
+				       dev);
+		break;
+	case S_IFBLK:
+		error = ccs_mkdev_perm(CCS_TYPE_MKBLOCK, dentry, mnt, perm,
+				       dev);
+		break;
+	case S_IFIFO:
+		error = ccs_path_number_perm(CCS_TYPE_MKFIFO, dentry, mnt,
+					     perm);
+		break;
+	case S_IFSOCK:
+		error = ccs_path_number_perm(CCS_TYPE_MKSOCK, dentry, mnt,
+					     perm);
+		break;
+	case 0:
+	case S_IFREG:
+		error = ccs_path_number_perm(CCS_TYPE_CREATE, dentry, mnt,
+					     perm);
+		break;
+	}
+	return error;
+}
+
+/**
+ * __ccs_mkdir_permission - Check permission for vfs_mkdir().
+ *
+ * @dentry: Pointer to "struct dentry".
+ * @mnt:    Pointer to "struct vfsmount". Maybe NULL.
+ * @mode:   Create mode.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int __ccs_mkdir_permission(struct dentry *dentry, struct vfsmount *mnt,
+				  unsigned int mode)
+{
+	return ccs_path_number_perm(CCS_TYPE_MKDIR, dentry, mnt, mode);
+}
+
+/**
+ * __ccs_rmdir_permission - Check permission for vfs_rmdir().
+ *
+ * @dentry: Pointer to "struct dentry".
+ * @mnt:    Pointer to "struct vfsmount". Maybe NULL.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int __ccs_rmdir_permission(struct dentry *dentry, struct vfsmount *mnt)
+{
+	return ccs_path_perm(CCS_TYPE_RMDIR, dentry, mnt, NULL);
+}
+
+/**
+ * __ccs_unlink_permission - Check permission for vfs_unlink().
+ *
+ * @dentry: Pointer to "struct dentry".
+ * @mnt:    Pointer to "struct vfsmount". Maybe NULL.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int __ccs_unlink_permission(struct dentry *dentry, struct vfsmount *mnt)
+{
+	return ccs_path_perm(CCS_TYPE_UNLINK, dentry, mnt, NULL);
+}
+
+#ifdef CONFIG_CCSECURITY_FILE_GETATTR
+
+/**
+ * __ccs_getattr_permission - Check permission for vfs_getattr().
+ *
+ * @mnt:    Pointer to "struct vfsmount". Maybe NULL.
+ * @dentry: Pointer to "struct dentry".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int __ccs_getattr_permission(struct vfsmount *mnt,
+				    struct dentry *dentry)
+{
+	return ccs_path_perm(CCS_TYPE_GETATTR, dentry, mnt, NULL);
+}
+
+#endif
+
+/**
+ * __ccs_symlink_permission - Check permission for vfs_symlink().
+ *
+ * @dentry: Pointer to "struct dentry".
+ * @mnt:    Pointer to "struct vfsmount". Maybe NULL.
+ * @from:   Content of symlink.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int __ccs_symlink_permission(struct dentry *dentry,
+				    struct vfsmount *mnt, const char *from)
+{
+	return ccs_path_perm(CCS_TYPE_SYMLINK, dentry, mnt, from);
+}
+
+/**
+ * __ccs_truncate_permission - Check permission for notify_change().
+ *
+ * @dentry: Pointer to "struct dentry".
+ * @mnt:    Pointer to "struct vfsmount". Maybe NULL.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int __ccs_truncate_permission(struct dentry *dentry,
+				     struct vfsmount *mnt)
+{
+	return ccs_path_perm(CCS_TYPE_TRUNCATE, dentry, mnt, NULL);
+}
+
+/**
+ * __ccs_rename_permission - Check permission for vfs_rename().
+ *
+ * @old_dentry: Pointer to "struct dentry".
+ * @new_dentry: Pointer to "struct dentry".
+ * @mnt:        Pointer to "struct vfsmount". Maybe NULL.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int __ccs_rename_permission(struct dentry *old_dentry,
+				   struct dentry *new_dentry,
+				   struct vfsmount *mnt)
+{
+	return ccs_path2_perm(CCS_TYPE_RENAME, old_dentry, mnt, new_dentry,
+			      mnt);
+}
+
+/**
+ * __ccs_link_permission - Check permission for vfs_link().
+ *
+ * @old_dentry: Pointer to "struct dentry".
+ * @new_dentry: Pointer to "struct dentry".
+ * @mnt:        Pointer to "struct vfsmount". Maybe NULL.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int __ccs_link_permission(struct dentry *old_dentry,
+				 struct dentry *new_dentry,
+				 struct vfsmount *mnt)
+{
+	return ccs_path2_perm(CCS_TYPE_LINK, old_dentry, mnt, new_dentry, mnt);
+}
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 30)
+
+/**
+ * __ccs_open_exec_permission - Check permission for open_exec().
+ *
+ * @dentry: Pointer to "struct dentry".
+ * @mnt:    Pointer to "struct vfsmount".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int __ccs_open_exec_permission(struct dentry *dentry,
+				      struct vfsmount *mnt)
+{
+	return (ccs_current_flags() & CCS_TASK_IS_IN_EXECVE) ?
+		__ccs_open_permission(dentry, mnt, O_RDONLY + 1) : 0;
+}
+
+/**
+ * __ccs_uselib_permission - Check permission for sys_uselib().
+ *
+ * @dentry: Pointer to "struct dentry".
+ * @mnt:    Pointer to "struct vfsmount".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int __ccs_uselib_permission(struct dentry *dentry, struct vfsmount *mnt)
+{
+	return __ccs_open_permission(dentry, mnt, O_RDONLY + 1);
+}
+
+#endif
+
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 18) || (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 33) && defined(CONFIG_SYSCTL_SYSCALL))
+
+/**
+ * __ccs_parse_table - Check permission for parse_table().
+ *
+ * @name:   Pointer to "int __user".
+ * @nlen:   Number of elements in @name.
+ * @oldval: Pointer to "void __user".
+ * @newval: Pointer to "void __user".
+ * @table:  Pointer to "struct ctl_table".
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Note that this function is racy because this function checks values in
+ * userspace memory which could be changed after permission check.
+ */
+static int __ccs_parse_table(int __user *name, int nlen, void __user *oldval,
+			     void __user *newval, struct ctl_table *table)
+{
+	int n;
+	int error = -ENOMEM;
+	int op = 0;
+	struct ccs_path_info buf;
+	char *buffer = NULL;
+	struct ccs_request_info r;
+	int idx;
+	if (oldval)
+		op |= 004;
+	if (newval)
+		op |= 002;
+	if (!op) /* Neither read nor write */
+		return 0;
+	idx = ccs_read_lock();
+	if (ccs_init_request_info(&r, CCS_MAC_FILE_OPEN)
+	    == CCS_CONFIG_DISABLED) {
+		error = 0;
+		goto out;
+	}
+	buffer = kmalloc(PAGE_SIZE, CCS_GFP_FLAGS);
+	if (!buffer)
+		goto out;
+	snprintf(buffer, PAGE_SIZE - 1, "proc:/sys");
+repeat:
+	if (!nlen) {
+		error = -ENOTDIR;
+		goto out;
+	}
+	if (get_user(n, name)) {
+		error = -EFAULT;
+		goto out;
+	}
+	for ( ; table->ctl_name
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 21)
+		      || table->procname
+#endif
+		      ; table++) {
+		int pos;
+		const char *cp;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 21)
+		if (n != table->ctl_name && table->ctl_name != CTL_ANY)
+			continue;
+#else
+		if (!n || n != table->ctl_name)
+			continue;
+#endif
+		pos = strlen(buffer);
+		cp = table->procname;
+		error = -ENOMEM;
+		if (cp) {
+			int len = strlen(cp);
+			if (len + 2 > PAGE_SIZE - 1)
+				goto out;
+			buffer[pos++] = '/';
+			memmove(buffer + pos, cp, len + 1);
+		} else {
+			/* Assume nobody assigns "=\$=" for procname. */
+			snprintf(buffer + pos, PAGE_SIZE - pos - 1,
+				 "/=%d=", table->ctl_name);
+			if (!memchr(buffer, '\0', PAGE_SIZE - 2))
+				goto out;
+		}
+		if (!table->child)
+			goto no_child;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 21)
+		if (!table->strategy)
+			goto no_strategy;
+		/* printk("sysctl='%s'\n", buffer); */
+		buf.name = ccs_encode(buffer);
+		if (!buf.name)
+			goto out;
+		ccs_fill_path_info(&buf);
+		if (op & MAY_READ)
+			error = ccs_path_permission(&r, CCS_TYPE_READ, &buf);
+		else
+			error = 0;
+		if (!error && (op & MAY_WRITE))
+			error = ccs_path_permission(&r, CCS_TYPE_WRITE, &buf);
+		kfree(buf.name);
+		if (error)
+			goto out;
+no_strategy:
+#endif
+		name++;
+		nlen--;
+		table = table->child;
+		goto repeat;
+no_child:
+		/* printk("sysctl='%s'\n", buffer); */
+		buf.name = ccs_encode(buffer);
+		if (!buf.name)
+			goto out;
+		ccs_fill_path_info(&buf);
+		if (op & MAY_READ)
+			error = ccs_path_permission(&r, CCS_TYPE_READ, &buf);
+		else
+			error = 0;
+		if (!error && (op & MAY_WRITE))
+			error = ccs_path_permission(&r, CCS_TYPE_WRITE, &buf);
+		kfree(buf.name);
+		goto out;
+	}
+	error = -ENOTDIR;
+out:
+	ccs_read_unlock(idx);
+	kfree(buffer);
+	return error;
+}
+
+#endif
+
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 24)
+
+/**
+ * ccs_old_pivot_root_permission - Check permission for pivot_root().
+ *
+ * @old_nd: Pointer to "struct nameidata".
+ * @new_nd: Pointer to "struct nameidata".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int ccs_old_pivot_root_permission(struct nameidata *old_nd,
+					 struct nameidata *new_nd)
+{
+	struct path old_path = { old_nd->mnt, old_nd->dentry };
+	struct path new_path = { new_nd->mnt, new_nd->dentry };
+	return __ccs_pivot_root_permission(&old_path, &new_path);
+}
+
+/**
+ * ccs_old_chroot_permission - Check permission for chroot().
+ *
+ * @nd: Pointer to "struct nameidata".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int ccs_old_chroot_permission(struct nameidata *nd)
+{
+	struct path path = { nd->mnt, nd->dentry };
+	return __ccs_chroot_permission(&path);
+}
+
+#endif
+
+#ifdef CONFIG_CCSECURITY_NETWORK
+
+/**
+ * ccs_address_matches_group - Check whether the given address matches members of the given address group.
+ *
+ * @is_ipv6: True if @address is an IPv6 address.
+ * @address: An IPv4 or IPv6 address.
+ * @group:   Pointer to "struct ccs_address_group".
+ *
+ * Returns true if @address matches addresses in @group group, false otherwise.
+ *
+ * Caller holds ccs_read_lock().
+ */
+static bool ccs_address_matches_group(const bool is_ipv6, const u32 *address,
+				      const struct ccs_group *group)
+{
+	struct ccs_address_group *member;
+	bool matched = false;
+	const u8 size = is_ipv6 ? 16 : 4;
+	list_for_each_entry_srcu(member, &group->member_list, head.list,
+				 &ccs_ss) {
+		if (member->head.is_deleted)
+			continue;
+		if (member->address.is_ipv6 != is_ipv6)
+			continue;
+		if (memcmp(&member->address.ip[0], address, size) > 0 ||
+		    memcmp(address, &member->address.ip[1], size) > 0)
+			continue;
+		matched = true;
+		break;
+	}
+	return matched;
+}
+
+/**
+ * ccs_check_inet_acl - Check permission for inet domain socket operation.
+ *
+ * @r:   Pointer to "struct ccs_request_info".
+ * @ptr: Pointer to "struct ccs_acl_info".
+ *
+ * Returns true if granted, false otherwise.
+ */
+static bool ccs_check_inet_acl(struct ccs_request_info *r,
+			       const struct ccs_acl_info *ptr)
+{
+	const struct ccs_inet_acl *acl = container_of(ptr, typeof(*acl), head);
+	const u8 size = r->param.inet_network.is_ipv6 ? 16 : 4;
+	if (!(ptr->perm & (1 << r->param.inet_network.operation)) ||
+	    !ccs_compare_number_union(r->param.inet_network.port, &acl->port))
+		return false;
+	if (acl->address.group)
+		return ccs_address_matches_group(r->param.inet_network.is_ipv6,
+						 r->param.inet_network.address,
+						 acl->address.group);
+	return acl->address.is_ipv6 == r->param.inet_network.is_ipv6 &&
+		memcmp(&acl->address.ip[0],
+		       r->param.inet_network.address, size) <= 0 &&
+		memcmp(r->param.inet_network.address,
+		       &acl->address.ip[1], size) <= 0;
+}
+
+/**
+ * ccs_check_unix_acl - Check permission for unix domain socket operation.
+ *
+ * @r:   Pointer to "struct ccs_request_info".
+ * @ptr: Pointer to "struct ccs_acl_info".
+ *
+ * Returns true if granted, false otherwise.
+ */
+static bool ccs_check_unix_acl(struct ccs_request_info *r,
+			       const struct ccs_acl_info *ptr)
+{
+	const struct ccs_unix_acl *acl = container_of(ptr, typeof(*acl), head);
+	return (ptr->perm & (1 << r->param.unix_network.operation)) &&
+		ccs_compare_name_union(r->param.unix_network.address,
+				       &acl->name);
+}
+
+/**
+ * ccs_inet_entry - Check permission for INET network operation.
+ *
+ * @address: Pointer to "struct ccs_addr_info".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int ccs_inet_entry(const struct ccs_addr_info *address)
+{
+	const int idx = ccs_read_lock();
+	struct ccs_request_info r;
+	int error = 0;
+	const u8 type = ccs_inet2mac[address->protocol][address->operation];
+	if (type && ccs_init_request_info(&r, type) != CCS_CONFIG_DISABLED) {
+		r.param_type = CCS_TYPE_INET_ACL;
+		r.param.inet_network.protocol = address->protocol;
+		r.param.inet_network.operation = address->operation;
+		r.param.inet_network.is_ipv6 = address->inet.is_ipv6;
+		r.param.inet_network.address = address->inet.address;
+		r.param.inet_network.port = ntohs(address->inet.port);
+		r.dont_sleep_on_enforce_error =
+			address->operation == CCS_NETWORK_ACCEPT
+#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG
+			|| address->operation == CCS_NETWORK_RECV
+#endif
+			;
+		error = ccs_check_acl(&r);
+	}
+	ccs_read_unlock(idx);
+	return error;
+}
+
+/**
+ * ccs_check_inet_address - Check permission for inet domain socket's operation.
+ *
+ * @addr:     Pointer to "struct sockaddr".
+ * @addr_len: Size of @addr.
+ * @port:     Port number.
+ * @address:  Pointer to "struct ccs_addr_info".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int ccs_check_inet_address(const struct sockaddr *addr,
+				  const unsigned int addr_len, const u16 port,
+				  struct ccs_addr_info *address)
+{
+	struct ccs_inet_addr_info *i = &address->inet;
+	switch (addr->sa_family) {
+	case AF_INET6:
+		if (addr_len < SIN6_LEN_RFC2133)
+			goto skip;
+		i->is_ipv6 = true;
+		i->address = (u32 *)
+			((struct sockaddr_in6 *) addr)->sin6_addr.s6_addr;
+		i->port = ((struct sockaddr_in6 *) addr)->sin6_port;
+		break;
+	case AF_INET:
+		if (addr_len < sizeof(struct sockaddr_in))
+			goto skip;
+		i->is_ipv6 = false;
+		i->address = (u32 *) &((struct sockaddr_in *) addr)->sin_addr;
+		i->port = ((struct sockaddr_in *) addr)->sin_port;
+		break;
+	default:
+		goto skip;
+	}
+	if (address->protocol == SOCK_RAW)
+		i->port = htons(port);
+	return ccs_inet_entry(address);
+skip:
+	return 0;
+}
+
+/**
+ * ccs_unix_entry - Check permission for UNIX network operation.
+ *
+ * @address: Pointer to "struct ccs_addr_info".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int ccs_unix_entry(const struct ccs_addr_info *address)
+{
+	const int idx = ccs_read_lock();
+	struct ccs_request_info r;
+	int error = 0;
+	const u8 type = ccs_unix2mac[address->protocol][address->operation];
+	if (type && ccs_init_request_info(&r, type) != CCS_CONFIG_DISABLED) {
+		char *buf = address->unix0.addr;
+		int len = address->unix0.addr_len - sizeof(sa_family_t);
+		if (len <= 0) {
+			buf = "anonymous";
+			len = 9;
+		} else if (buf[0]) {
+			len = strnlen(buf, len);
+		}
+		buf = ccs_encode2(buf, len);
+		if (buf) {
+			struct ccs_path_info addr;
+			addr.name = buf;
+			ccs_fill_path_info(&addr);
+			r.param_type = CCS_TYPE_UNIX_ACL;
+			r.param.unix_network.protocol = address->protocol;
+			r.param.unix_network.operation = address->operation;
+			r.param.unix_network.address = &addr;
+			r.dont_sleep_on_enforce_error =
+				address->operation == CCS_NETWORK_ACCEPT
+#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG
+				|| address->operation == CCS_NETWORK_RECV
+#endif
+				;
+			error = ccs_check_acl(&r);
+			kfree(buf);
+		} else
+			error = -ENOMEM;
+	}
+	ccs_read_unlock(idx);
+	return error;
+}
+
+/**
+ * ccs_check_unix_address - Check permission for unix domain socket's operation.
+ *
+ * @addr:     Pointer to "struct sockaddr".
+ * @addr_len: Size of @addr.
+ * @address:  Pointer to "struct ccs_addr_info".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int ccs_check_unix_address(struct sockaddr *addr,
+				  const unsigned int addr_len,
+				  struct ccs_addr_info *address)
+{
+	struct ccs_unix_addr_info *u = &address->unix0;
+	if (addr->sa_family != AF_UNIX)
+		return 0;
+	u->addr = ((struct sockaddr_un *) addr)->sun_path;
+	u->addr_len = addr_len;
+	return ccs_unix_entry(address);
+}
+
+/**
+ * ccs_sock_family - Get socket's family.
+ *
+ * @sk: Pointer to "struct sock".
+ *
+ * Returns one of PF_INET, PF_INET6, PF_UNIX or 0.
+ */
+static u8 ccs_sock_family(struct sock *sk)
+{
+	u8 family;
+	if (ccs_kernel_service())
+		return 0;
+	family = sk->sk_family;
+	switch (family) {
+	case PF_INET:
+	case PF_INET6:
+	case PF_UNIX:
+		return family;
+	default:
+		return 0;
+	}
+}
+
+/**
+ * __ccs_socket_listen_permission - Check permission for listening a socket.
+ *
+ * @sock: Pointer to "struct socket".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int __ccs_socket_listen_permission(struct socket *sock)
+{
+	struct ccs_addr_info address;
+	const u8 family = ccs_sock_family(sock->sk);
+	const unsigned int type = sock->type;
+	struct sockaddr_storage addr;
+	int addr_len;
+	if (!family || (type != SOCK_STREAM && type != SOCK_SEQPACKET))
+		return 0;
+	{
+		const int error = sock->ops->getname(sock, (struct sockaddr *)
+						     &addr, &addr_len, 0);
+		if (error)
+			return error;
+	}
+	address.protocol = type;
+	address.operation = CCS_NETWORK_LISTEN;
+	if (family == PF_UNIX)
+		return ccs_check_unix_address((struct sockaddr *) &addr,
+					      addr_len, &address);
+	return ccs_check_inet_address((struct sockaddr *) &addr, addr_len, 0,
+				      &address);
+}
+
+/**
+ * __ccs_socket_connect_permission - Check permission for setting the remote address of a socket.
+ *
+ * @sock:     Pointer to "struct socket".
+ * @addr:     Pointer to "struct sockaddr".
+ * @addr_len: Size of @addr.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int __ccs_socket_connect_permission(struct socket *sock,
+					   struct sockaddr *addr, int addr_len)
+{
+	struct ccs_addr_info address;
+	const u8 family = ccs_sock_family(sock->sk);
+	const unsigned int type = sock->type;
+	if (!family)
+		return 0;
+	address.protocol = type;
+	switch (type) {
+	case SOCK_DGRAM:
+	case SOCK_RAW:
+		address.operation = CCS_NETWORK_SEND;
+		break;
+	case SOCK_STREAM:
+	case SOCK_SEQPACKET:
+		address.operation = CCS_NETWORK_CONNECT;
+		break;
+	default:
+		return 0;
+	}
+	if (family == PF_UNIX)
+		return ccs_check_unix_address(addr, addr_len, &address);
+	return ccs_check_inet_address(addr, addr_len, sock->sk->sk_protocol,
+				      &address);
+}
+
+/**
+ * __ccs_socket_bind_permission - Check permission for setting the local address of a socket.
+ *
+ * @sock:     Pointer to "struct socket".
+ * @addr:     Pointer to "struct sockaddr".
+ * @addr_len: Size of @addr.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int __ccs_socket_bind_permission(struct socket *sock,
+					struct sockaddr *addr, int addr_len)
+{
+	struct ccs_addr_info address;
+	const u8 family = ccs_sock_family(sock->sk);
+	const unsigned int type = sock->type;
+	if (!family)
+		return 0;
+	switch (type) {
+	case SOCK_STREAM:
+	case SOCK_DGRAM:
+	case SOCK_RAW:
+	case SOCK_SEQPACKET:
+		address.protocol = type;
+		address.operation = CCS_NETWORK_BIND;
+		break;
+	default:
+		return 0;
+	}
+	if (family == PF_UNIX)
+		return ccs_check_unix_address(addr, addr_len, &address);
+	return ccs_check_inet_address(addr, addr_len, sock->sk->sk_protocol,
+				      &address);
+}
+
+/**
+ * __ccs_socket_sendmsg_permission - Check permission for sending a datagram.
+ *
+ * @sock: Pointer to "struct socket".
+ * @msg:  Pointer to "struct msghdr".
+ * @size: Unused.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int __ccs_socket_sendmsg_permission(struct socket *sock,
+					   struct msghdr *msg, int size)
+{
+	struct ccs_addr_info address;
+	const u8 family = ccs_sock_family(sock->sk);
+	const unsigned int type = sock->type;
+	if (!msg->msg_name || !family ||
+	    (type != SOCK_DGRAM && type != SOCK_RAW))
+		return 0;
+	address.protocol = type;
+	address.operation = CCS_NETWORK_SEND;
+	if (family == PF_UNIX)
+		return ccs_check_unix_address((struct sockaddr *)
+					      msg->msg_name, msg->msg_namelen,
+					      &address);
+	return ccs_check_inet_address((struct sockaddr *) msg->msg_name,
+				      msg->msg_namelen, sock->sk->sk_protocol,
+				      &address);
+}
+
+/**
+ * __ccs_socket_post_accept_permission - Check permission for accepting a socket.
+ *
+ * @sock:    Pointer to "struct socket".
+ * @newsock: Pointer to "struct socket".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int __ccs_socket_post_accept_permission(struct socket *sock,
+					       struct socket *newsock)
+{
+	struct ccs_addr_info address;
+	const u8 family = ccs_sock_family(sock->sk);
+	const unsigned int type = sock->type;
+	struct sockaddr_storage addr;
+	int addr_len;
+	if (!family || (type != SOCK_STREAM && type != SOCK_SEQPACKET))
+		return 0;
+	{
+		const int error = newsock->ops->getname(newsock,
+							(struct sockaddr *)
+							&addr, &addr_len, 2);
+		if (error)
+			return error;
+	}
+	address.protocol = type;
+	address.operation = CCS_NETWORK_ACCEPT;
+	if (family == PF_UNIX)
+		return ccs_check_unix_address((struct sockaddr *) &addr,
+					      addr_len, &address);
+	return ccs_check_inet_address((struct sockaddr *) &addr, addr_len, 0,
+				      &address);
+}
+
+#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG
+
+/**
+ * __ccs_socket_post_recvmsg_permission - Check permission for receiving a datagram.
+ *
+ * @sk:    Pointer to "struct sock".
+ * @skb:   Pointer to "struct sk_buff".
+ * @flags: Flags passed to skb_recv_datagram().
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int __ccs_socket_post_recvmsg_permission(struct sock *sk,
+						struct sk_buff *skb, int flags)
+{
+	struct ccs_addr_info address;
+	const u8 family = ccs_sock_family(sk);
+	const unsigned int type = sk->sk_type;
+	struct sockaddr_storage addr;
+	if (!family)
+		return 0;
+	switch (type) {
+	case SOCK_DGRAM:
+	case SOCK_RAW:
+		address.protocol = type;
+		break;
+	default:
+		return 0;
+	}
+	address.operation = CCS_NETWORK_RECV;
+	switch (family) {
+	case PF_INET6:
+		{
+			struct in6_addr *sin6 = (struct in6_addr *) &addr;
+			address.inet.is_ipv6 = true;
+			if (type == SOCK_DGRAM &&
+			    skb->protocol == htons(ETH_P_IP))
+				ipv6_addr_set(sin6, 0, 0, htonl(0xffff),
+					      ip_hdr(skb)->saddr);
+			else
+				*sin6 = ipv6_hdr(skb)->saddr;
+			break;
+		}
+	case PF_INET:
+		{
+			struct in_addr *sin4 = (struct in_addr *) &addr;
+			address.inet.is_ipv6 = false;
+			sin4->s_addr = ip_hdr(skb)->saddr;
+			break;
+		}
+	default: /* == PF_UNIX */
+		{
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 0)
+			struct unix_address *u = unix_sk(skb->sk)->addr;
+#else
+			struct unix_address *u =
+				skb->sk->protinfo.af_unix.addr;
+#endif
+			unsigned int addr_len;
+			if (u && u->len <= sizeof(addr)) {
+				addr_len = u->len;
+				memcpy(&addr, u->name, addr_len);
+			} else {
+				addr_len = 0;
+				addr.ss_family = AF_UNIX;
+			}
+			if (ccs_check_unix_address((struct sockaddr *) &addr,
+						   addr_len, &address))
+				goto out;
+			return 0;
+		}
+	}
+	address.inet.address = (u32 *) &addr;
+	if (type == SOCK_DGRAM)
+		address.inet.port = udp_hdr(skb)->source;
+	else
+		address.inet.port = htons(sk->sk_protocol);
+	if (ccs_inet_entry(&address))
+		goto out;
+	return 0;
+out:
+	/*
+	 * Remove from queue if MSG_PEEK is used so that
+	 * the head message from unwanted source in receive queue will not
+	 * prevent the caller from picking up next message from wanted source
+	 * when the caller is using MSG_PEEK flag for picking up.
+	 */
+	{
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 35)
+		bool slow = false;
+		if (type == SOCK_DGRAM && family != PF_UNIX)
+			slow = lock_sock_fast(sk);
+#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25)
+		if (type == SOCK_DGRAM && family != PF_UNIX)
+			lock_sock(sk);
+#elif defined(RHEL_MAJOR) && RHEL_MAJOR == 5 && defined(RHEL_MINOR) && RHEL_MINOR >= 2
+		if (type == SOCK_DGRAM && family != PF_UNIX)
+			lock_sock(sk);
+#endif
+		skb_kill_datagram(sk, skb, flags);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 35)
+		if (type == SOCK_DGRAM && family != PF_UNIX)
+			unlock_sock_fast(sk, slow);
+#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25)
+		if (type == SOCK_DGRAM && family != PF_UNIX)
+			release_sock(sk);
+#elif defined(RHEL_MAJOR) && RHEL_MAJOR == 5 && defined(RHEL_MINOR) && RHEL_MINOR >= 2
+		if (type == SOCK_DGRAM && family != PF_UNIX)
+			release_sock(sk);
+#endif
+	}
+	return -EPERM;
+}
+
+#endif
+
+#endif
+
+#if defined(CONFIG_CCSECURITY_CAPABILITY) || defined(CONFIG_CCSECURITY_NETWORK)
+
+/**
+ * ccs_kernel_service - Check whether I'm kernel service or not.
+ *
+ * Returns true if I'm kernel service, false otherwise.
+ */
+static bool ccs_kernel_service(void)
+{
+	/* Nothing to do if I am a kernel service. */
+	return segment_eq(get_fs(), KERNEL_DS);
+}
+
+#endif
+
+#ifdef CONFIG_CCSECURITY_CAPABILITY
+
+/**
+ * ccs_check_capability_acl - Check permission for capability operation.
+ *
+ * @r:   Pointer to "struct ccs_request_info".
+ * @ptr: Pointer to "struct ccs_acl_info".
+ *
+ * Returns true if granted, false otherwise.
+ */
+static bool ccs_check_capability_acl(struct ccs_request_info *r,
+				     const struct ccs_acl_info *ptr)
+{
+	const struct ccs_capability_acl *acl =
+		container_of(ptr, typeof(*acl), head);
+	return acl->operation == r->param.capability.operation;
+}
+
+/**
+ * ccs_capable - Check permission for capability.
+ *
+ * @operation: Type of operation.
+ *
+ * Returns true on success, false otherwise.
+ */
+static bool __ccs_capable(const u8 operation)
+{
+	struct ccs_request_info r;
+	int error = 0;
+	const int idx = ccs_read_lock();
+	if (ccs_init_request_info(&r, ccs_c2mac[operation])
+	    != CCS_CONFIG_DISABLED) {
+		r.param_type = CCS_TYPE_CAPABILITY_ACL;
+		r.param.capability.operation = operation;
+		error = ccs_check_acl(&r);
+	}
+	ccs_read_unlock(idx);
+	return !error;
+}
+
+/**
+ * __ccs_socket_create_permission - Check permission for creating a socket.
+ *
+ * @family:   Protocol family.
+ * @type:     Unused.
+ * @protocol: Unused.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int __ccs_socket_create_permission(int family, int type, int protocol)
+{
+	if (ccs_kernel_service())
+		return 0;
+	if (family == PF_PACKET && !ccs_capable(CCS_USE_PACKET_SOCKET))
+		return -EPERM;
+	if (family == PF_ROUTE && !ccs_capable(CCS_USE_ROUTE_SOCKET))
+		return -EPERM;
+	return 0;
+}
+
+/**
+ * __ccs_ptrace_permission - Check permission for ptrace().
+ *
+ * @request: Unused.
+ * @pid:     Unused.
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Since this function is called from location where it is permitted to sleep,
+ * it is racy to check target process's domainname anyway. Therefore, we don't
+ * use target process's domainname.
+ */
+static int __ccs_ptrace_permission(long request, long pid)
+{
+	return __ccs_capable(CCS_SYS_PTRACE) ? 0 : -EPERM;
+}
+
+#endif
+
+#ifdef CONFIG_CCSECURITY_IPC
+
+/**
+ * ccs_check_signal_acl - Check permission for signal operation.
+ *
+ * @r:   Pointer to "struct ccs_request_info".
+ * @ptr: Pointer to "struct ccs_acl_info".
+ *
+ * Returns true if granted, false otherwise.
+ */
+static bool ccs_check_signal_acl(struct ccs_request_info *r,
+				 const struct ccs_acl_info *ptr)
+{
+	const struct ccs_signal_acl *acl =
+		container_of(ptr, typeof(*acl), head);
+	if (ccs_compare_number_union(r->param.signal.sig, &acl->sig)) {
+		const int len = acl->domainname->total_len;
+		if (!strncmp(acl->domainname->name,
+			     r->param.signal.dest_pattern, len)) {
+			switch (r->param.signal.dest_pattern[len]) {
+			case ' ':
+			case '\0':
+				return true;
+			}
+		}
+	}
+	return false;
+}
+
+/**
+ * ccs_signal_acl2 - Check permission for signal.
+ *
+ * @sig: Signal number.
+ * @pid: Target's PID.
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds ccs_read_lock().
+ */
+static int ccs_signal_acl2(const int sig, const int pid)
+{
+	struct ccs_request_info r;
+	struct ccs_domain_info *dest = NULL;
+	const struct ccs_domain_info * const domain = ccs_current_domain();
+	if (ccs_init_request_info(&r, CCS_MAC_SIGNAL) == CCS_CONFIG_DISABLED)
+		return 0;
+	if (!sig)
+		return 0;                /* No check for NULL signal. */
+	r.param_type = CCS_TYPE_SIGNAL_ACL;
+	r.param.signal.sig = sig;
+	r.param.signal.dest_pattern = domain->domainname->name;
+	r.granted = true;
+	if (ccs_sys_getpid() == pid) {
+		ccs_audit_log(&r);
+		return 0;                /* No check for self process. */
+	}
+	{ /* Simplified checking. */
+		struct task_struct *p = NULL;
+		ccs_tasklist_lock();
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 24)
+		if (pid > 0)
+			p = ccsecurity_exports.find_task_by_vpid((pid_t) pid);
+		else if (pid == 0)
+			p = current;
+		else if (pid == -1)
+			dest = &ccs_kernel_domain;
+		else
+			p = ccsecurity_exports.find_task_by_vpid((pid_t) -pid);
+#else
+		if (pid > 0)
+			p = find_task_by_pid((pid_t) pid);
+		else if (pid == 0)
+			p = current;
+		else if (pid == -1)
+			dest = &ccs_kernel_domain;
+		else
+			p = find_task_by_pid((pid_t) -pid);
+#endif
+		if (p)
+			dest = ccs_task_domain(p);
+		ccs_tasklist_unlock();
+	}
+	if (!dest)
+		return 0; /* I can't find destinatioin. */
+	if (domain == dest) {
+		ccs_audit_log(&r);
+		return 0;                /* No check for self domain. */
+	}
+	r.param.signal.dest_pattern = dest->domainname->name;
+	return ccs_check_acl(&r);
+}
+
+/**
+ * ccs_signal_acl - Check permission for signal.
+ *
+ * @pid: Target's PID.
+ * @sig: Signal number.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int ccs_signal_acl(const int pid, const int sig)
+{
+	int error;
+	if (!sig)
+		error = 0;
+	else {
+		const int idx = ccs_read_lock();
+		error = ccs_signal_acl2(sig, pid);
+		ccs_read_unlock(idx);
+	}
+	return error;
+}
+
+/**
+ * ccs_signal_acl0 - Permission check for signal().
+ *
+ * @tgid: Unused.
+ * @pid:  Target's PID.
+ * @sig:  Signal number.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int ccs_signal_acl0(pid_t tgid, pid_t pid, int sig)
+{
+	return ccs_signal_acl(pid, sig);
+}
+
+#endif
+
+#ifdef CONFIG_CCSECURITY_MISC
+
+/**
+ * ccs_check_env_acl - Check permission for environment variable's name.
+ *
+ * @r:   Pointer to "struct ccs_request_info".
+ * @ptr: Pointer to "struct ccs_acl_info".
+ *
+ * Returns true if granted, false otherwise.
+ */
+static bool ccs_check_env_acl(struct ccs_request_info *r,
+			      const struct ccs_acl_info *ptr)
+{
+	const struct ccs_env_acl *acl = container_of(ptr, typeof(*acl), head);
+	return ccs_path_matches_pattern(r->param.environ.name, acl->env);
+}
+
+/**
+ * ccs_env_perm - Check permission for environment variable's name.
+ *
+ * @r:   Pointer to "struct ccs_request_info".
+ * @env: The name of environment variable.
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds ccs_read_lock().
+ */
+static int ccs_env_perm(struct ccs_request_info *r, const char *env)
+{
+	struct ccs_path_info environ;
+	if (!env || !*env)
+		return 0;
+	environ.name = env;
+	ccs_fill_path_info(&environ);
+	r->param_type = CCS_TYPE_ENV_ACL;
+	r->param.environ.name = &environ;
+	return ccs_check_acl(r);
+}
+
+/**
+ * ccs_environ - Check permission for environment variable names.
+ *
+ * @ee: Pointer to "struct ccs_execve".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int ccs_environ(struct ccs_execve *ee)
+{
+	struct ccs_request_info *r = &ee->r;
+	struct linux_binprm *bprm = ee->bprm;
+	/* env_page.data is allocated by ccs_dump_page(). */
+	struct ccs_page_dump env_page = { };
+	char *arg_ptr; /* Size is CCS_EXEC_TMPSIZE bytes */
+	int arg_len = 0;
+	unsigned long pos = bprm->p;
+	int offset = pos % PAGE_SIZE;
+	int argv_count = bprm->argc;
+	int envp_count = bprm->envc;
+	/* printk(KERN_DEBUG "start %d %d\n", argv_count, envp_count); */
+	int error = -ENOMEM;
+	ee->r.type = CCS_MAC_ENVIRON;
+	ee->r.profile = ccs_current_domain()->profile;
+	ee->r.mode = ccs_get_mode(ee->r.profile, CCS_MAC_ENVIRON);
+	if (!r->mode || !envp_count)
+		return 0;
+	arg_ptr = kzalloc(CCS_EXEC_TMPSIZE, CCS_GFP_FLAGS);
+	if (!arg_ptr)
+		goto out;
+	while (error == -ENOMEM) {
+		if (!ccs_dump_page(bprm, pos, &env_page))
+			goto out;
+		pos += PAGE_SIZE - offset;
+		/* Read. */
+		while (argv_count && offset < PAGE_SIZE) {
+			if (!env_page.data[offset++])
+				argv_count--;
+		}
+		if (argv_count) {
+			offset = 0;
+			continue;
+		}
+		while (offset < PAGE_SIZE) {
+			const unsigned char c = env_page.data[offset++];
+			if (c && arg_len < CCS_EXEC_TMPSIZE - 10) {
+				if (c == '=') {
+					arg_ptr[arg_len++] = '\0';
+				} else if (c == '\\') {
+					arg_ptr[arg_len++] = '\\';
+					arg_ptr[arg_len++] = '\\';
+				} else if (c > ' ' && c < 127) {
+					arg_ptr[arg_len++] = c;
+				} else {
+					arg_ptr[arg_len++] = '\\';
+					arg_ptr[arg_len++] = (c >> 6) + '0';
+					arg_ptr[arg_len++]
+						= ((c >> 3) & 7) + '0';
+					arg_ptr[arg_len++] = (c & 7) + '0';
+				}
+			} else {
+				arg_ptr[arg_len] = '\0';
+			}
+			if (c)
+				continue;
+			if (ccs_env_perm(r, arg_ptr)) {
+				error = -EPERM;
+				break;
+			}
+			if (!--envp_count) {
+				error = 0;
+				break;
+			}
+			arg_len = 0;
+		}
+		offset = 0;
+	}
+out:
+	if (r->mode != CCS_CONFIG_ENFORCING)
+		error = 0;
+	kfree(env_page.data);
+	kfree(arg_ptr);
+	return error;
+}
+
+#endif
+
+/**
+ * ccs_argv - Check argv[] in "struct linux_binbrm".
+ *
+ * @index:   Index number of @arg_ptr.
+ * @arg_ptr: Contents of argv[@index].
+ * @argc:    Length of @argv.
+ * @argv:    Pointer to "struct ccs_argv".
+ * @checked: Set to true if @argv[@index] was found.
+ *
+ * Returns true on success, false otherwise.
+ */
+static bool ccs_argv(const unsigned int index, const char *arg_ptr,
+		     const int argc, const struct ccs_argv *argv,
+		     u8 *checked)
+{
+	int i;
+	struct ccs_path_info arg;
+	arg.name = arg_ptr;
+	for (i = 0; i < argc; argv++, checked++, i++) {
+		bool result;
+		if (index != argv->index)
+			continue;
+		*checked = 1;
+		ccs_fill_path_info(&arg);
+		result = ccs_path_matches_pattern(&arg, argv->value);
+		if (argv->is_not)
+			result = !result;
+		if (!result)
+			return false;
+	}
+	return true;
+}
+
+/**
+ * ccs_envp - Check envp[] in "struct linux_binbrm".
+ *
+ * @env_name:  The name of environment variable.
+ * @env_value: The value of environment variable.
+ * @envc:      Length of @envp.
+ * @envp:      Pointer to "struct ccs_envp".
+ * @checked:   Set to true if @envp[@env_name] was found.
+ *
+ * Returns true on success, false otherwise.
+ */
+static bool ccs_envp(const char *env_name, const char *env_value,
+		     const int envc, const struct ccs_envp *envp,
+		     u8 *checked)
+{
+	int i;
+	struct ccs_path_info name;
+	struct ccs_path_info value;
+	name.name = env_name;
+	ccs_fill_path_info(&name);
+	value.name = env_value;
+	ccs_fill_path_info(&value);
+	for (i = 0; i < envc; envp++, checked++, i++) {
+		bool result;
+		if (!ccs_path_matches_pattern(&name, envp->name))
+			continue;
+		*checked = 1;
+		if (envp->value) {
+			result = ccs_path_matches_pattern(&value, envp->value);
+			if (envp->is_not)
+				result = !result;
+		} else {
+			result = true;
+			if (!envp->is_not)
+				result = !result;
+		}
+		if (!result)
+			return false;
+	}
+	return true;
+}
+
+/**
+ * ccs_scan_bprm - Scan "struct linux_binprm".
+ *
+ * @ee:   Pointer to "struct ccs_execve".
+ * @argc: Length of @argc.
+ * @argv: Pointer to "struct ccs_argv".
+ * @envc: Length of @envp.
+ * @envp: Poiner to "struct ccs_envp".
+ *
+ * Returns true on success, false otherwise.
+ */
+static bool ccs_scan_bprm(struct ccs_execve *ee,
+			  const u16 argc, const struct ccs_argv *argv,
+			  const u16 envc, const struct ccs_envp *envp)
+{
+	struct linux_binprm *bprm = ee->bprm;
+	struct ccs_page_dump *dump = &ee->dump;
+	char *arg_ptr = ee->tmp;
+	int arg_len = 0;
+	unsigned long pos = bprm->p;
+	int offset = pos % PAGE_SIZE;
+	int argv_count = bprm->argc;
+	int envp_count = bprm->envc;
+	bool result = true;
+	u8 local_checked[32];
+	u8 *checked;
+	if (argc + envc <= sizeof(local_checked)) {
+		checked = local_checked;
+		memset(local_checked, 0, sizeof(local_checked));
+	} else {
+		checked = kzalloc(argc + envc, CCS_GFP_FLAGS);
+		if (!checked)
+			return false;
+	}
+	while (argv_count || envp_count) {
+		if (!ccs_dump_page(bprm, pos, dump)) {
+			result = false;
+			goto out;
+		}
+		pos += PAGE_SIZE - offset;
+		while (offset < PAGE_SIZE) {
+			/* Read. */
+			const char *kaddr = dump->data;
+			const unsigned char c = kaddr[offset++];
+			if (c && arg_len < CCS_EXEC_TMPSIZE - 10) {
+				if (c == '\\') {
+					arg_ptr[arg_len++] = '\\';
+					arg_ptr[arg_len++] = '\\';
+				} else if (c > ' ' && c < 127) {
+					arg_ptr[arg_len++] = c;
+				} else {
+					arg_ptr[arg_len++] = '\\';
+					arg_ptr[arg_len++] = (c >> 6) + '0';
+					arg_ptr[arg_len++] =
+						((c >> 3) & 7) + '0';
+					arg_ptr[arg_len++] = (c & 7) + '0';
+				}
+			} else {
+				arg_ptr[arg_len] = '\0';
+			}
+			if (c)
+				continue;
+			/* Check. */
+			if (argv_count) {
+				if (!ccs_argv(bprm->argc - argv_count,
+					      arg_ptr, argc, argv,
+					      checked)) {
+					result = false;
+					break;
+				}
+				argv_count--;
+			} else if (envp_count) {
+				char *cp = strchr(arg_ptr, '=');
+				if (cp) {
+					*cp = '\0';
+					if (!ccs_envp(arg_ptr, cp + 1,
+						      envc, envp,
+						      checked + argc)) {
+						result = false;
+						break;
+					}
+				}
+				envp_count--;
+			} else {
+				break;
+			}
+			arg_len = 0;
+		}
+		offset = 0;
+		if (!result)
+			break;
+	}
+out:
+	if (result) {
+		int i;
+		/* Check not-yet-checked entries. */
+		for (i = 0; i < argc; i++) {
+			if (checked[i])
+				continue;
+			/*
+			 * Return true only if all unchecked indexes in
+			 * bprm->argv[] are not matched.
+			 */
+			if (argv[i].is_not)
+				continue;
+			result = false;
+			break;
+		}
+		for (i = 0; i < envc; envp++, i++) {
+			if (checked[argc + i])
+				continue;
+			/*
+			 * Return true only if all unchecked environ variables
+			 * in bprm->envp[] are either undefined or not matched.
+			 */
+			if ((!envp->value && !envp->is_not) ||
+			    (envp->value && envp->is_not))
+				continue;
+			result = false;
+			break;
+		}
+	}
+	if (checked != local_checked)
+		kfree(checked);
+	return result;
+}
+
+/**
+ * ccs_scan_exec_realpath - Check "exec.realpath" parameter of "struct ccs_condition".
+ *
+ * @file:  Pointer to "struct file".
+ * @ptr:   Pointer to "struct ccs_name_union".
+ * @match: True if "exec.realpath=", false if "exec.realpath!=".
+ *
+ * Returns true on success, false otherwise.
+ */
+static bool ccs_scan_exec_realpath(struct file *file,
+				   const struct ccs_name_union *ptr,
+				   const bool match)
+{
+	bool result;
+	struct ccs_path_info exe;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 20)
+	struct path path;
+#endif
+	if (!file)
+		return false;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 20)
+	exe.name = ccs_realpath(&file->f_path);
+#else
+	path.mnt = file->f_vfsmnt;
+	path.dentry = file->f_dentry;
+	exe.name = ccs_realpath(&path);
+#endif
+	if (!exe.name)
+		return false;
+	ccs_fill_path_info(&exe);
+	result = ccs_compare_name_union(&exe, ptr);
+	kfree(exe.name);
+	return result == match;
+}
+
+/**
+ * ccs_get_attributes - Revalidate "struct inode".
+ *
+ * @obj: Pointer to "struct ccs_obj_info".
+ *
+ * Returns nothing.
+ */
+void ccs_get_attributes(struct ccs_obj_info *obj)
+{
+	u8 i;
+	struct dentry *dentry = NULL;
+
+	for (i = 0; i < CCS_MAX_PATH_STAT; i++) {
+		struct inode *inode;
+		switch (i) {
+		case CCS_PATH1:
+			dentry = obj->path1.dentry;
+			if (!dentry)
+				continue;
+			break;
+		case CCS_PATH2:
+			dentry = obj->path2.dentry;
+			if (!dentry)
+				continue;
+			break;
+		default:
+			if (!dentry)
+				continue;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0)
+			spin_lock(&dcache_lock);
+			dentry = dget(dentry->d_parent);
+			spin_unlock(&dcache_lock);
+#else
+			dentry = dget_parent(dentry);
+#endif
+			break;
+		}
+		inode = dentry->d_inode;
+		if (inode) {
+			struct ccs_mini_stat *stat = &obj->stat[i];
+			stat->uid  = inode->i_uid;
+			stat->gid  = inode->i_gid;
+			stat->ino  = inode->i_ino;
+			stat->mode = inode->i_mode;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0)
+			stat->dev  = inode->i_dev;
+#else
+			stat->dev  = inode->i_sb->s_dev;
+#endif
+			stat->rdev = inode->i_rdev;
+			obj->stat_valid[i] = true;
+		}
+		if (i & 1) /* i == CCS_PATH1_PARENT || i == CCS_PATH2_PARENT */
+			dput(dentry);
+	}
+}
+
+/**
+ * ccs_condition - Check condition part.
+ *
+ * @r:    Pointer to "struct ccs_request_info".
+ * @cond: Pointer to "struct ccs_condition". Maybe NULL.
+ *
+ * Returns true on success, false otherwise.
+ *
+ * Caller holds ccs_read_lock().
+ */
+static bool ccs_condition(struct ccs_request_info *r,
+			  const struct ccs_condition *cond)
+{
+	const u32 ccs_flags = ccs_current_flags();
+	u32 i;
+	unsigned long min_v[2] = { 0, 0 };
+	unsigned long max_v[2] = { 0, 0 };
+	const struct ccs_condition_element *condp;
+	const struct ccs_number_union *numbers_p;
+	const struct ccs_name_union *names_p;
+	const struct ccs_argv *argv;
+	const struct ccs_envp *envp;
+	struct ccs_obj_info *obj;
+	u16 condc;
+	u16 argc;
+	u16 envc;
+	struct linux_binprm *bprm = NULL;
+	if (!cond)
+		return true;
+	condc = cond->condc;
+	argc = cond->argc;
+	envc = cond->envc;
+	obj = r->obj;
+	if (r->ee)
+		bprm = r->ee->bprm;
+	if (!bprm && (argc || envc))
+		return false;
+	condp = (struct ccs_condition_element *) (cond + 1);
+	numbers_p = (const struct ccs_number_union *) (condp + condc);
+	names_p = (const struct ccs_name_union *)
+		(numbers_p + cond->numbers_count);
+	argv = (const struct ccs_argv *) (names_p + cond->names_count);
+	envp = (const struct ccs_envp *) (argv + argc);
+	for (i = 0; i < condc; i++) {
+		const bool match = condp->equals;
+		const u8 left = condp->left;
+		const u8 right = condp->right;
+		bool is_bitop[2] = { false, false };
+		u8 j;
+		condp++;
+		/* Check argv[] and envp[] later. */
+		if (left == CCS_ARGV_ENTRY || left == CCS_ENVP_ENTRY)
+			continue;
+		/* Check string expressions. */
+		if (right == CCS_NAME_UNION) {
+			const struct ccs_name_union *ptr = names_p++;
+			switch (left) {
+				struct ccs_path_info *symlink;
+				struct ccs_execve *ee;
+				struct file *file;
+			case CCS_SYMLINK_TARGET:
+				symlink = obj ? obj->symlink_target : NULL;
+				if (!symlink ||
+				    !ccs_compare_name_union(symlink, ptr)
+				    == match)
+					goto out;
+				break;
+			case CCS_EXEC_REALPATH:
+				ee = r->ee;
+				file = ee ? ee->bprm->file : NULL;
+				if (!ccs_scan_exec_realpath(file, ptr, match))
+					goto out;
+				break;
+			}
+			continue;
+		}
+		/* Check numeric or bit-op expressions. */
+		for (j = 0; j < 2; j++) {
+			const u8 index = j ? right : left;
+			unsigned long value = 0;
+			switch (index) {
+			case CCS_TASK_UID:
+				value = from_kuid(&init_user_ns,
+						  current_uid());
+				break;
+			case CCS_TASK_EUID:
+				value = from_kuid(&init_user_ns,
+						  current_euid());
+				break;
+			case CCS_TASK_SUID:
+				value = from_kuid(&init_user_ns,
+						  current_suid());
+				break;
+			case CCS_TASK_FSUID:
+				value = from_kuid(&init_user_ns,
+						  current_fsuid());
+				break;
+			case CCS_TASK_GID:
+				value = from_kgid(&init_user_ns,
+						  current_gid());
+				break;
+			case CCS_TASK_EGID:
+				value = from_kgid(&init_user_ns,
+						  current_egid());
+				break;
+			case CCS_TASK_SGID:
+				value = from_kgid(&init_user_ns,
+						  current_sgid());
+				break;
+			case CCS_TASK_FSGID:
+				value = from_kgid(&init_user_ns,
+						  current_fsgid());
+				break;
+			case CCS_TASK_PID:
+				value = ccs_sys_getpid();
+				break;
+			case CCS_TASK_PPID:
+				value = ccs_sys_getppid();
+				break;
+			case CCS_TYPE_IS_SOCKET:
+				value = S_IFSOCK;
+				break;
+			case CCS_TYPE_IS_SYMLINK:
+				value = S_IFLNK;
+				break;
+			case CCS_TYPE_IS_FILE:
+				value = S_IFREG;
+				break;
+			case CCS_TYPE_IS_BLOCK_DEV:
+				value = S_IFBLK;
+				break;
+			case CCS_TYPE_IS_DIRECTORY:
+				value = S_IFDIR;
+				break;
+			case CCS_TYPE_IS_CHAR_DEV:
+				value = S_IFCHR;
+				break;
+			case CCS_TYPE_IS_FIFO:
+				value = S_IFIFO;
+				break;
+			case CCS_MODE_SETUID:
+				value = S_ISUID;
+				break;
+			case CCS_MODE_SETGID:
+				value = S_ISGID;
+				break;
+			case CCS_MODE_STICKY:
+				value = S_ISVTX;
+				break;
+			case CCS_MODE_OWNER_READ:
+				value = S_IRUSR;
+				break;
+			case CCS_MODE_OWNER_WRITE:
+				value = S_IWUSR;
+				break;
+			case CCS_MODE_OWNER_EXECUTE:
+				value = S_IXUSR;
+				break;
+			case CCS_MODE_GROUP_READ:
+				value = S_IRGRP;
+				break;
+			case CCS_MODE_GROUP_WRITE:
+				value = S_IWGRP;
+				break;
+			case CCS_MODE_GROUP_EXECUTE:
+				value = S_IXGRP;
+				break;
+			case CCS_MODE_OTHERS_READ:
+				value = S_IROTH;
+				break;
+			case CCS_MODE_OTHERS_WRITE:
+				value = S_IWOTH;
+				break;
+			case CCS_MODE_OTHERS_EXECUTE:
+				value = S_IXOTH;
+				break;
+			case CCS_EXEC_ARGC:
+				if (!bprm)
+					goto out;
+				value = bprm->argc;
+				break;
+			case CCS_EXEC_ENVC:
+				if (!bprm)
+					goto out;
+				value = bprm->envc;
+				break;
+			case CCS_TASK_TYPE:
+				value = ((u8) ccs_flags)
+					& CCS_TASK_IS_EXECUTE_HANDLER;
+				break;
+			case CCS_TASK_EXECUTE_HANDLER:
+				value = CCS_TASK_IS_EXECUTE_HANDLER;
+				break;
+			case CCS_NUMBER_UNION:
+				/* Fetch values later. */
+				break;
+			default:
+				if (!obj)
+					goto out;
+				if (!obj->validate_done) {
+					ccs_get_attributes(obj);
+					obj->validate_done = true;
+				}
+				{
+					u8 stat_index;
+					struct ccs_mini_stat *stat;
+					switch (index) {
+					case CCS_PATH1_UID:
+					case CCS_PATH1_GID:
+					case CCS_PATH1_INO:
+					case CCS_PATH1_MAJOR:
+					case CCS_PATH1_MINOR:
+					case CCS_PATH1_TYPE:
+					case CCS_PATH1_DEV_MAJOR:
+					case CCS_PATH1_DEV_MINOR:
+					case CCS_PATH1_PERM:
+						stat_index = CCS_PATH1;
+						break;
+					case CCS_PATH2_UID:
+					case CCS_PATH2_GID:
+					case CCS_PATH2_INO:
+					case CCS_PATH2_MAJOR:
+					case CCS_PATH2_MINOR:
+					case CCS_PATH2_TYPE:
+					case CCS_PATH2_DEV_MAJOR:
+					case CCS_PATH2_DEV_MINOR:
+					case CCS_PATH2_PERM:
+						stat_index = CCS_PATH2;
+						break;
+					case CCS_PATH1_PARENT_UID:
+					case CCS_PATH1_PARENT_GID:
+					case CCS_PATH1_PARENT_INO:
+					case CCS_PATH1_PARENT_PERM:
+						stat_index = CCS_PATH1_PARENT;
+						break;
+					case CCS_PATH2_PARENT_UID:
+					case CCS_PATH2_PARENT_GID:
+					case CCS_PATH2_PARENT_INO:
+					case CCS_PATH2_PARENT_PERM:
+						stat_index = CCS_PATH2_PARENT;
+						break;
+					default:
+						goto out;
+					}
+					if (!obj->stat_valid[stat_index])
+						goto out;
+					stat = &obj->stat[stat_index];
+					switch (index) {
+					case CCS_PATH1_UID:
+					case CCS_PATH2_UID:
+					case CCS_PATH1_PARENT_UID:
+					case CCS_PATH2_PARENT_UID:
+						value = from_kuid
+							(&init_user_ns,
+							 stat->uid);
+						break;
+					case CCS_PATH1_GID:
+					case CCS_PATH2_GID:
+					case CCS_PATH1_PARENT_GID:
+					case CCS_PATH2_PARENT_GID:
+						value = from_kgid
+							(&init_user_ns,
+							 stat->gid);
+						break;
+					case CCS_PATH1_INO:
+					case CCS_PATH2_INO:
+					case CCS_PATH1_PARENT_INO:
+					case CCS_PATH2_PARENT_INO:
+						value = stat->ino;
+						break;
+					case CCS_PATH1_MAJOR:
+					case CCS_PATH2_MAJOR:
+						value = MAJOR(stat->dev);
+						break;
+					case CCS_PATH1_MINOR:
+					case CCS_PATH2_MINOR:
+						value = MINOR(stat->dev);
+						break;
+					case CCS_PATH1_TYPE:
+					case CCS_PATH2_TYPE:
+						value = stat->mode & S_IFMT;
+						break;
+					case CCS_PATH1_DEV_MAJOR:
+					case CCS_PATH2_DEV_MAJOR:
+						value = MAJOR(stat->rdev);
+						break;
+					case CCS_PATH1_DEV_MINOR:
+					case CCS_PATH2_DEV_MINOR:
+						value = MINOR(stat->rdev);
+						break;
+					case CCS_PATH1_PERM:
+					case CCS_PATH2_PERM:
+					case CCS_PATH1_PARENT_PERM:
+					case CCS_PATH2_PARENT_PERM:
+						value = stat->mode & S_IALLUGO;
+						break;
+					}
+				}
+				break;
+			}
+			max_v[j] = value;
+			min_v[j] = value;
+			switch (index) {
+			case CCS_MODE_SETUID:
+			case CCS_MODE_SETGID:
+			case CCS_MODE_STICKY:
+			case CCS_MODE_OWNER_READ:
+			case CCS_MODE_OWNER_WRITE:
+			case CCS_MODE_OWNER_EXECUTE:
+			case CCS_MODE_GROUP_READ:
+			case CCS_MODE_GROUP_WRITE:
+			case CCS_MODE_GROUP_EXECUTE:
+			case CCS_MODE_OTHERS_READ:
+			case CCS_MODE_OTHERS_WRITE:
+			case CCS_MODE_OTHERS_EXECUTE:
+				is_bitop[j] = true;
+			}
+		}
+		if (left == CCS_NUMBER_UNION) {
+			/* Fetch values now. */
+			const struct ccs_number_union *ptr = numbers_p++;
+			min_v[0] = ptr->values[0];
+			max_v[0] = ptr->values[1];
+		}
+		if (right == CCS_NUMBER_UNION) {
+			/* Fetch values now. */
+			const struct ccs_number_union *ptr = numbers_p++;
+			if (ptr->group) {
+				if (ccs_number_matches_group(min_v[0],
+							     max_v[0],
+							     ptr->group)
+				    == match)
+					continue;
+			} else {
+				if ((min_v[0] <= ptr->values[1] &&
+				     max_v[0] >= ptr->values[0]) == match)
+					continue;
+			}
+			goto out;
+		}
+		/*
+		 * Bit operation is valid only when counterpart value
+		 * represents permission.
+		 */
+		if (is_bitop[0] && is_bitop[1]) {
+			goto out;
+		} else if (is_bitop[0]) {
+			switch (right) {
+			case CCS_PATH1_PERM:
+			case CCS_PATH1_PARENT_PERM:
+			case CCS_PATH2_PERM:
+			case CCS_PATH2_PARENT_PERM:
+				if (!(max_v[0] & max_v[1]) == !match)
+					continue;
+			}
+			goto out;
+		} else if (is_bitop[1]) {
+			switch (left) {
+			case CCS_PATH1_PERM:
+			case CCS_PATH1_PARENT_PERM:
+			case CCS_PATH2_PERM:
+			case CCS_PATH2_PARENT_PERM:
+				if (!(max_v[0] & max_v[1]) == !match)
+					continue;
+			}
+			goto out;
+		}
+		/* Normal value range comparison. */
+		if ((min_v[0] <= max_v[1] && max_v[0] >= min_v[1]) == match)
+			continue;
+out:
+		return false;
+	}
+	/* Check argv[] and envp[] now. */
+	if (r->ee && (argc || envc))
+		return ccs_scan_bprm(r->ee, argc, argv, envc, envp);
+	return true;
+}
+
+#ifdef CONFIG_CCSECURITY_TASK_DOMAIN_TRANSITION
+
+/**
+ * ccs_check_task_acl - Check permission for task operation.
+ *
+ * @r:   Pointer to "struct ccs_request_info".
+ * @ptr: Pointer to "struct ccs_acl_info".
+ *
+ * Returns true if granted, false otherwise.
+ */
+static bool ccs_check_task_acl(struct ccs_request_info *r,
+			       const struct ccs_acl_info *ptr)
+{
+	const struct ccs_task_acl *acl = container_of(ptr, typeof(*acl), head);
+	return !ccs_pathcmp(r->param.task.domainname, acl->domainname);
+}
+
+#endif
+
+/**
+ * ccs_init_request_info - Initialize "struct ccs_request_info" members.
+ *
+ * @r:     Pointer to "struct ccs_request_info" to initialize.
+ * @index: Index number of functionality.
+ *
+ * Returns mode.
+ *
+ * "task auto_domain_transition" keyword is evaluated before returning mode for
+ * @index. If "task auto_domain_transition" keyword was specified and
+ * transition to that domain failed, the current thread will be killed by
+ * SIGKILL. Note that if current->pid == 1, sending SIGKILL won't work.
+ */
+int ccs_init_request_info(struct ccs_request_info *r, const u8 index)
+{
+#ifdef CONFIG_CCSECURITY_TASK_DOMAIN_TRANSITION
+	u8 i;
+	const char *buf;
+	for (i = 0; i < 255; i++) {
+		const u8 profile = ccs_current_domain()->profile;
+		memset(r, 0, sizeof(*r));
+		r->profile = profile;
+		r->type = index;
+		r->mode = ccs_get_mode(profile, index);
+		r->param_type = CCS_TYPE_AUTO_TASK_ACL;
+		ccs_check_acl(r);
+		if (!r->granted)
+			return r->mode;
+		buf = container_of(r->matched_acl, typeof(struct ccs_task_acl),
+				   head)->domainname->name;
+		if (!ccs_assign_domain(buf, true))
+			break;
+	}
+	ccs_transition_failed(buf);
+	return CCS_CONFIG_DISABLED;
+#else
+	const u8 profile = ccs_current_domain()->profile;
+	memset(r, 0, sizeof(*r));
+	r->profile = profile;
+	r->type = index;
+	r->mode = ccs_get_mode(profile, index);
+	return r->mode;
+#endif
+}
+
+/**
+ * ccs_byte_range - Check whether the string is a \ooo style octal value.
+ *
+ * @str: Pointer to the string.
+ *
+ * Returns true if @str is a \ooo style octal value, false otherwise.
+ */
+static bool ccs_byte_range(const char *str)
+{
+	return *str >= '0' && *str++ <= '3' &&
+		*str >= '0' && *str++ <= '7' &&
+		*str >= '0' && *str <= '7';
+}
+
+/**
+ * ccs_decimal - Check whether the character is a decimal character.
+ *
+ * @c: The character to check.
+ *
+ * Returns true if @c is a decimal character, false otherwise.
+ */
+static bool ccs_decimal(const char c)
+{
+	return c >= '0' && c <= '9';
+}
+
+/**
+ * ccs_hexadecimal - Check whether the character is a hexadecimal character.
+ *
+ * @c: The character to check.
+ *
+ * Returns true if @c is a hexadecimal character, false otherwise.
+ */
+static bool ccs_hexadecimal(const char c)
+{
+	return (c >= '0' && c <= '9') ||
+		(c >= 'A' && c <= 'F') ||
+		(c >= 'a' && c <= 'f');
+}
+
+/**
+ * ccs_alphabet_char - Check whether the character is an alphabet.
+ *
+ * @c: The character to check.
+ *
+ * Returns true if @c is an alphabet character, false otherwise.
+ */
+static bool ccs_alphabet_char(const char c)
+{
+	return (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z');
+}
+
+/**
+ * ccs_file_matches_pattern2 - Pattern matching without '/' character and "\-" pattern.
+ *
+ * @filename:     The start of string to check.
+ * @filename_end: The end of string to check.
+ * @pattern:      The start of pattern to compare.
+ * @pattern_end:  The end of pattern to compare.
+ *
+ * Returns true if @filename matches @pattern, false otherwise.
+ */
+static bool ccs_file_matches_pattern2(const char *filename,
+				      const char *filename_end,
+				      const char *pattern,
+				      const char *pattern_end)
+{
+	while (filename < filename_end && pattern < pattern_end) {
+		char c;
+		if (*pattern != '\\') {
+			if (*filename++ != *pattern++)
+				return false;
+			continue;
+		}
+		c = *filename;
+		pattern++;
+		switch (*pattern) {
+			int i;
+			int j;
+		case '?':
+			if (c == '/') {
+				return false;
+			} else if (c == '\\') {
+				if (filename[1] == '\\')
+					filename++;
+				else if (ccs_byte_range(filename + 1))
+					filename += 3;
+				else
+					return false;
+			}
+			break;
+		case '\\':
+			if (c != '\\')
+				return false;
+			if (*++filename != '\\')
+				return false;
+			break;
+		case '+':
+			if (!ccs_decimal(c))
+				return false;
+			break;
+		case 'x':
+			if (!ccs_hexadecimal(c))
+				return false;
+			break;
+		case 'a':
+			if (!ccs_alphabet_char(c))
+				return false;
+			break;
+		case '0':
+		case '1':
+		case '2':
+		case '3':
+			if (c == '\\' && ccs_byte_range(filename + 1)
+			    && !strncmp(filename + 1, pattern, 3)) {
+				filename += 3;
+				pattern += 2;
+				break;
+			}
+			return false; /* Not matched. */
+		case '*':
+		case '@':
+			for (i = 0; i <= filename_end - filename; i++) {
+				if (ccs_file_matches_pattern2(filename + i,
+							      filename_end,
+							      pattern + 1,
+							      pattern_end))
+					return true;
+				c = filename[i];
+				if (c == '.' && *pattern == '@')
+					break;
+				if (c != '\\')
+					continue;
+				if (filename[i + 1] == '\\')
+					i++;
+				else if (ccs_byte_range(filename + i + 1))
+					i += 3;
+				else
+					break; /* Bad pattern. */
+			}
+			return false; /* Not matched. */
+		default:
+			j = 0;
+			c = *pattern;
+			if (c == '$') {
+				while (ccs_decimal(filename[j]))
+					j++;
+			} else if (c == 'X') {
+				while (ccs_hexadecimal(filename[j]))
+					j++;
+			} else if (c == 'A') {
+				while (ccs_alphabet_char(filename[j]))
+					j++;
+			}
+			for (i = 1; i <= j; i++) {
+				if (ccs_file_matches_pattern2(filename + i,
+							      filename_end,
+							      pattern + 1,
+							      pattern_end))
+					return true;
+			}
+			return false; /* Not matched or bad pattern. */
+		}
+		filename++;
+		pattern++;
+	}
+	while (*pattern == '\\' &&
+	       (*(pattern + 1) == '*' || *(pattern + 1) == '@'))
+		pattern += 2;
+	return filename == filename_end && pattern == pattern_end;
+}
+
+/**
+ * ccs_file_matches_pattern - Pattern matching without '/' character.
+ *
+ * @filename:     The start of string to check.
+ * @filename_end: The end of string to check.
+ * @pattern:      The start of pattern to compare.
+ * @pattern_end:  The end of pattern to compare.
+ *
+ * Returns true if @filename matches @pattern, false otherwise.
+ */
+static bool ccs_file_matches_pattern(const char *filename,
+				     const char *filename_end,
+				     const char *pattern,
+				     const char *pattern_end)
+{
+	const char *pattern_start = pattern;
+	bool first = true;
+	bool result;
+	while (pattern < pattern_end - 1) {
+		/* Split at "\-" pattern. */
+		if (*pattern++ != '\\' || *pattern++ != '-')
+			continue;
+		result = ccs_file_matches_pattern2(filename, filename_end,
+						   pattern_start, pattern - 2);
+		if (first)
+			result = !result;
+		if (result)
+			return false;
+		first = false;
+		pattern_start = pattern;
+	}
+	result = ccs_file_matches_pattern2(filename, filename_end,
+					   pattern_start, pattern_end);
+	return first ? result : !result;
+}
+
+/**
+ * ccs_path_matches_pattern2 - Do pathname pattern matching.
+ *
+ * @f: The start of string to check.
+ * @p: The start of pattern to compare.
+ *
+ * Returns true if @f matches @p, false otherwise.
+ */
+static bool ccs_path_matches_pattern2(const char *f, const char *p)
+{
+	const char *f_delimiter;
+	const char *p_delimiter;
+	while (*f && *p) {
+		f_delimiter = strchr(f, '/');
+		if (!f_delimiter)
+			f_delimiter = f + strlen(f);
+		p_delimiter = strchr(p, '/');
+		if (!p_delimiter)
+			p_delimiter = p + strlen(p);
+		if (*p == '\\' && *(p + 1) == '{')
+			goto recursive;
+		if (!ccs_file_matches_pattern(f, f_delimiter, p, p_delimiter))
+			return false;
+		f = f_delimiter;
+		if (*f)
+			f++;
+		p = p_delimiter;
+		if (*p)
+			p++;
+	}
+	/* Ignore trailing "\*" and "\@" in @pattern. */
+	while (*p == '\\' &&
+	       (*(p + 1) == '*' || *(p + 1) == '@'))
+		p += 2;
+	return !*f && !*p;
+recursive:
+	/*
+	 * The "\{" pattern is permitted only after '/' character.
+	 * This guarantees that below "*(p - 1)" is safe.
+	 * Also, the "\}" pattern is permitted only before '/' character
+	 * so that "\{" + "\}" pair will not break the "\-" operator.
+	 */
+	if (*(p - 1) != '/' || p_delimiter <= p + 3 || *p_delimiter != '/' ||
+	    *(p_delimiter - 1) != '}' || *(p_delimiter - 2) != '\\')
+		return false; /* Bad pattern. */
+	do {
+		/* Compare current component with pattern. */
+		if (!ccs_file_matches_pattern(f, f_delimiter, p + 2,
+					      p_delimiter - 2))
+			break;
+		/* Proceed to next component. */
+		f = f_delimiter;
+		if (!*f)
+			break;
+		f++;
+		/* Continue comparison. */
+		if (ccs_path_matches_pattern2(f, p_delimiter + 1))
+			return true;
+		f_delimiter = strchr(f, '/');
+	} while (f_delimiter);
+	return false; /* Not matched. */
+}
+
+/**
+ * ccs_path_matches_pattern - Check whether the given filename matches the given pattern.
+ *
+ * @filename: The filename to check.
+ * @pattern:  The pattern to compare.
+ *
+ * Returns true if matches, false otherwise.
+ *
+ * The following patterns are available.
+ *   \\     \ itself.
+ *   \ooo   Octal representation of a byte.
+ *   \*     Zero or more repetitions of characters other than '/'.
+ *   \@     Zero or more repetitions of characters other than '/' or '.'.
+ *   \?     1 byte character other than '/'.
+ *   \$     One or more repetitions of decimal digits.
+ *   \+     1 decimal digit.
+ *   \X     One or more repetitions of hexadecimal digits.
+ *   \x     1 hexadecimal digit.
+ *   \A     One or more repetitions of alphabet characters.
+ *   \a     1 alphabet character.
+ *
+ *   \-     Subtraction operator.
+ *
+ *   /\{dir\}/   '/' + 'One or more repetitions of dir/' (e.g. /dir/ /dir/dir/
+ *               /dir/dir/dir/ ).
+ */
+static bool ccs_path_matches_pattern(const struct ccs_path_info *filename,
+				     const struct ccs_path_info *pattern)
+{
+	const char *f = filename->name;
+	const char *p = pattern->name;
+	const int len = pattern->const_len;
+	/* If @pattern doesn't contain pattern, I can use strcmp(). */
+	if (!pattern->is_patterned)
+		return !ccs_pathcmp(filename, pattern);
+	/* Don't compare directory and non-directory. */
+	if (filename->is_dir != pattern->is_dir)
+		return false;
+	/* Compare the initial length without patterns. */
+	if (strncmp(f, p, len))
+		return false;
+	f += len;
+	p += len;
+	return ccs_path_matches_pattern2(f, p);
+}
diff --git a/security/ccsecurity/policy_io.c b/security/ccsecurity/policy_io.c
new file mode 100644
index 0000000..67adb50
--- /dev/null
+++ b/security/ccsecurity/policy_io.c
@@ -0,0 +1,6484 @@
+/*
+ * security/ccsecurity/policy_io.c
+ *
+ * Copyright (C) 2005-2012  NTT DATA CORPORATION
+ *
+ * Version: 1.8.4   2015/05/05
+ */
+
+#include "internal.h"
+
+/***** SECTION1: Constants definition *****/
+
+/* Define this to enable debug mode. */
+/* #define DEBUG_CONDITION */
+
+#ifdef DEBUG_CONDITION
+#define dprintk printk
+#else
+#define dprintk(...) do { } while (0)
+#endif
+
+/* Mapping table from "enum ccs_mac_index" to "enum ccs_mac_category_index". */
+static const u8 ccs_index2category[CCS_MAX_MAC_INDEX] = {
+	/* CONFIG::file group */
+	[CCS_MAC_FILE_EXECUTE]    = CCS_MAC_CATEGORY_FILE,
+	[CCS_MAC_FILE_OPEN]       = CCS_MAC_CATEGORY_FILE,
+	[CCS_MAC_FILE_CREATE]     = CCS_MAC_CATEGORY_FILE,
+	[CCS_MAC_FILE_UNLINK]     = CCS_MAC_CATEGORY_FILE,
+#ifdef CONFIG_CCSECURITY_FILE_GETATTR
+	[CCS_MAC_FILE_GETATTR]    = CCS_MAC_CATEGORY_FILE,
+#endif
+	[CCS_MAC_FILE_MKDIR]      = CCS_MAC_CATEGORY_FILE,
+	[CCS_MAC_FILE_RMDIR]      = CCS_MAC_CATEGORY_FILE,
+	[CCS_MAC_FILE_MKFIFO]     = CCS_MAC_CATEGORY_FILE,
+	[CCS_MAC_FILE_MKSOCK]     = CCS_MAC_CATEGORY_FILE,
+	[CCS_MAC_FILE_TRUNCATE]   = CCS_MAC_CATEGORY_FILE,
+	[CCS_MAC_FILE_SYMLINK]    = CCS_MAC_CATEGORY_FILE,
+	[CCS_MAC_FILE_MKBLOCK]    = CCS_MAC_CATEGORY_FILE,
+	[CCS_MAC_FILE_MKCHAR]     = CCS_MAC_CATEGORY_FILE,
+	[CCS_MAC_FILE_LINK]       = CCS_MAC_CATEGORY_FILE,
+	[CCS_MAC_FILE_RENAME]     = CCS_MAC_CATEGORY_FILE,
+	[CCS_MAC_FILE_CHMOD]      = CCS_MAC_CATEGORY_FILE,
+	[CCS_MAC_FILE_CHOWN]      = CCS_MAC_CATEGORY_FILE,
+	[CCS_MAC_FILE_CHGRP]      = CCS_MAC_CATEGORY_FILE,
+	[CCS_MAC_FILE_IOCTL]      = CCS_MAC_CATEGORY_FILE,
+	[CCS_MAC_FILE_CHROOT]     = CCS_MAC_CATEGORY_FILE,
+	[CCS_MAC_FILE_MOUNT]      = CCS_MAC_CATEGORY_FILE,
+	[CCS_MAC_FILE_UMOUNT]     = CCS_MAC_CATEGORY_FILE,
+	[CCS_MAC_FILE_PIVOT_ROOT] = CCS_MAC_CATEGORY_FILE,
+#ifdef CONFIG_CCSECURITY_MISC
+	/* CONFIG::misc group */
+	[CCS_MAC_ENVIRON]         = CCS_MAC_CATEGORY_MISC,
+#endif
+#ifdef CONFIG_CCSECURITY_NETWORK
+	/* CONFIG::network group */
+	[CCS_MAC_NETWORK_INET_STREAM_BIND]       = CCS_MAC_CATEGORY_NETWORK,
+	[CCS_MAC_NETWORK_INET_STREAM_LISTEN]     = CCS_MAC_CATEGORY_NETWORK,
+	[CCS_MAC_NETWORK_INET_STREAM_CONNECT]    = CCS_MAC_CATEGORY_NETWORK,
+	[CCS_MAC_NETWORK_INET_STREAM_ACCEPT]     = CCS_MAC_CATEGORY_NETWORK,
+	[CCS_MAC_NETWORK_INET_DGRAM_BIND]        = CCS_MAC_CATEGORY_NETWORK,
+	[CCS_MAC_NETWORK_INET_DGRAM_SEND]        = CCS_MAC_CATEGORY_NETWORK,
+#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG
+	[CCS_MAC_NETWORK_INET_DGRAM_RECV]        = CCS_MAC_CATEGORY_NETWORK,
+#endif
+	[CCS_MAC_NETWORK_INET_RAW_BIND]          = CCS_MAC_CATEGORY_NETWORK,
+	[CCS_MAC_NETWORK_INET_RAW_SEND]          = CCS_MAC_CATEGORY_NETWORK,
+#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG
+	[CCS_MAC_NETWORK_INET_RAW_RECV]          = CCS_MAC_CATEGORY_NETWORK,
+#endif
+	[CCS_MAC_NETWORK_UNIX_STREAM_BIND]       = CCS_MAC_CATEGORY_NETWORK,
+	[CCS_MAC_NETWORK_UNIX_STREAM_LISTEN]     = CCS_MAC_CATEGORY_NETWORK,
+	[CCS_MAC_NETWORK_UNIX_STREAM_CONNECT]    = CCS_MAC_CATEGORY_NETWORK,
+	[CCS_MAC_NETWORK_UNIX_STREAM_ACCEPT]     = CCS_MAC_CATEGORY_NETWORK,
+	[CCS_MAC_NETWORK_UNIX_DGRAM_BIND]        = CCS_MAC_CATEGORY_NETWORK,
+	[CCS_MAC_NETWORK_UNIX_DGRAM_SEND]        = CCS_MAC_CATEGORY_NETWORK,
+#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG
+	[CCS_MAC_NETWORK_UNIX_DGRAM_RECV]        = CCS_MAC_CATEGORY_NETWORK,
+#endif
+	[CCS_MAC_NETWORK_UNIX_SEQPACKET_BIND]    = CCS_MAC_CATEGORY_NETWORK,
+	[CCS_MAC_NETWORK_UNIX_SEQPACKET_LISTEN]  = CCS_MAC_CATEGORY_NETWORK,
+	[CCS_MAC_NETWORK_UNIX_SEQPACKET_CONNECT] = CCS_MAC_CATEGORY_NETWORK,
+	[CCS_MAC_NETWORK_UNIX_SEQPACKET_ACCEPT]  = CCS_MAC_CATEGORY_NETWORK,
+#endif
+#ifdef CONFIG_CCSECURITY_IPC
+	/* CONFIG::ipc group */
+	[CCS_MAC_SIGNAL]          = CCS_MAC_CATEGORY_IPC,
+#endif
+#ifdef CONFIG_CCSECURITY_CAPABILITY
+	/* CONFIG::capability group */
+	[CCS_MAC_CAPABILITY_USE_ROUTE_SOCKET]  = CCS_MAC_CATEGORY_CAPABILITY,
+	[CCS_MAC_CAPABILITY_USE_PACKET_SOCKET] = CCS_MAC_CATEGORY_CAPABILITY,
+	[CCS_MAC_CAPABILITY_SYS_REBOOT]        = CCS_MAC_CATEGORY_CAPABILITY,
+	[CCS_MAC_CAPABILITY_SYS_VHANGUP]       = CCS_MAC_CATEGORY_CAPABILITY,
+	[CCS_MAC_CAPABILITY_SYS_SETTIME]       = CCS_MAC_CATEGORY_CAPABILITY,
+	[CCS_MAC_CAPABILITY_SYS_NICE]          = CCS_MAC_CATEGORY_CAPABILITY,
+	[CCS_MAC_CAPABILITY_SYS_SETHOSTNAME]   = CCS_MAC_CATEGORY_CAPABILITY,
+	[CCS_MAC_CAPABILITY_USE_KERNEL_MODULE] = CCS_MAC_CATEGORY_CAPABILITY,
+	[CCS_MAC_CAPABILITY_SYS_KEXEC_LOAD]    = CCS_MAC_CATEGORY_CAPABILITY,
+	[CCS_MAC_CAPABILITY_SYS_PTRACE]        = CCS_MAC_CATEGORY_CAPABILITY,
+#endif
+};
+
+/* String table for operation mode. */
+static const char * const ccs_mode[CCS_CONFIG_MAX_MODE] = {
+	[CCS_CONFIG_DISABLED]   = "disabled",
+	[CCS_CONFIG_LEARNING]   = "learning",
+	[CCS_CONFIG_PERMISSIVE] = "permissive",
+	[CCS_CONFIG_ENFORCING]  = "enforcing"
+};
+
+/* String table for /proc/ccs/profile interface. */
+static const char * const ccs_mac_keywords[CCS_MAX_MAC_INDEX
+					   + CCS_MAX_MAC_CATEGORY_INDEX] = {
+	/* CONFIG::file group */
+	[CCS_MAC_FILE_EXECUTE]    = "execute",
+	[CCS_MAC_FILE_OPEN]       = "open",
+	[CCS_MAC_FILE_CREATE]     = "create",
+	[CCS_MAC_FILE_UNLINK]     = "unlink",
+#ifdef CONFIG_CCSECURITY_FILE_GETATTR
+	[CCS_MAC_FILE_GETATTR]    = "getattr",
+#endif
+	[CCS_MAC_FILE_MKDIR]      = "mkdir",
+	[CCS_MAC_FILE_RMDIR]      = "rmdir",
+	[CCS_MAC_FILE_MKFIFO]     = "mkfifo",
+	[CCS_MAC_FILE_MKSOCK]     = "mksock",
+	[CCS_MAC_FILE_TRUNCATE]   = "truncate",
+	[CCS_MAC_FILE_SYMLINK]    = "symlink",
+	[CCS_MAC_FILE_MKBLOCK]    = "mkblock",
+	[CCS_MAC_FILE_MKCHAR]     = "mkchar",
+	[CCS_MAC_FILE_LINK]       = "link",
+	[CCS_MAC_FILE_RENAME]     = "rename",
+	[CCS_MAC_FILE_CHMOD]      = "chmod",
+	[CCS_MAC_FILE_CHOWN]      = "chown",
+	[CCS_MAC_FILE_CHGRP]      = "chgrp",
+	[CCS_MAC_FILE_IOCTL]      = "ioctl",
+	[CCS_MAC_FILE_CHROOT]     = "chroot",
+	[CCS_MAC_FILE_MOUNT]      = "mount",
+	[CCS_MAC_FILE_UMOUNT]     = "unmount",
+	[CCS_MAC_FILE_PIVOT_ROOT] = "pivot_root",
+#ifdef CONFIG_CCSECURITY_MISC
+	/* CONFIG::misc group */
+	[CCS_MAC_ENVIRON] = "env",
+#endif
+#ifdef CONFIG_CCSECURITY_NETWORK
+	/* CONFIG::network group */
+	[CCS_MAC_NETWORK_INET_STREAM_BIND]       = "inet_stream_bind",
+	[CCS_MAC_NETWORK_INET_STREAM_LISTEN]     = "inet_stream_listen",
+	[CCS_MAC_NETWORK_INET_STREAM_CONNECT]    = "inet_stream_connect",
+	[CCS_MAC_NETWORK_INET_STREAM_ACCEPT]     = "inet_stream_accept",
+	[CCS_MAC_NETWORK_INET_DGRAM_BIND]        = "inet_dgram_bind",
+	[CCS_MAC_NETWORK_INET_DGRAM_SEND]        = "inet_dgram_send",
+#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG
+	[CCS_MAC_NETWORK_INET_DGRAM_RECV]        = "inet_dgram_recv",
+#endif
+	[CCS_MAC_NETWORK_INET_RAW_BIND]          = "inet_raw_bind",
+	[CCS_MAC_NETWORK_INET_RAW_SEND]          = "inet_raw_send",
+#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG
+	[CCS_MAC_NETWORK_INET_RAW_RECV]          = "inet_raw_recv",
+#endif
+	[CCS_MAC_NETWORK_UNIX_STREAM_BIND]       = "unix_stream_bind",
+	[CCS_MAC_NETWORK_UNIX_STREAM_LISTEN]     = "unix_stream_listen",
+	[CCS_MAC_NETWORK_UNIX_STREAM_CONNECT]    = "unix_stream_connect",
+	[CCS_MAC_NETWORK_UNIX_STREAM_ACCEPT]     = "unix_stream_accept",
+	[CCS_MAC_NETWORK_UNIX_DGRAM_BIND]        = "unix_dgram_bind",
+	[CCS_MAC_NETWORK_UNIX_DGRAM_SEND]        = "unix_dgram_send",
+#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG
+	[CCS_MAC_NETWORK_UNIX_DGRAM_RECV]        = "unix_dgram_recv",
+#endif
+	[CCS_MAC_NETWORK_UNIX_SEQPACKET_BIND]    = "unix_seqpacket_bind",
+	[CCS_MAC_NETWORK_UNIX_SEQPACKET_LISTEN]  = "unix_seqpacket_listen",
+	[CCS_MAC_NETWORK_UNIX_SEQPACKET_CONNECT] = "unix_seqpacket_connect",
+	[CCS_MAC_NETWORK_UNIX_SEQPACKET_ACCEPT]  = "unix_seqpacket_accept",
+#endif
+#ifdef CONFIG_CCSECURITY_IPC
+	/* CONFIG::ipc group */
+	[CCS_MAC_SIGNAL] = "signal",
+#endif
+#ifdef CONFIG_CCSECURITY_CAPABILITY
+	/* CONFIG::capability group */
+	[CCS_MAC_CAPABILITY_USE_ROUTE_SOCKET]  = "use_route",
+	[CCS_MAC_CAPABILITY_USE_PACKET_SOCKET] = "use_packet",
+	[CCS_MAC_CAPABILITY_SYS_REBOOT]        = "SYS_REBOOT",
+	[CCS_MAC_CAPABILITY_SYS_VHANGUP]       = "SYS_VHANGUP",
+	[CCS_MAC_CAPABILITY_SYS_SETTIME]       = "SYS_TIME",
+	[CCS_MAC_CAPABILITY_SYS_NICE]          = "SYS_NICE",
+	[CCS_MAC_CAPABILITY_SYS_SETHOSTNAME]   = "SYS_SETHOSTNAME",
+	[CCS_MAC_CAPABILITY_USE_KERNEL_MODULE] = "use_kernel_module",
+	[CCS_MAC_CAPABILITY_SYS_KEXEC_LOAD]    = "SYS_KEXEC_LOAD",
+	[CCS_MAC_CAPABILITY_SYS_PTRACE]        = "SYS_PTRACE",
+#endif
+	/* CONFIG group */
+	[CCS_MAX_MAC_INDEX + CCS_MAC_CATEGORY_FILE]       = "file",
+#ifdef CONFIG_CCSECURITY_NETWORK
+	[CCS_MAX_MAC_INDEX + CCS_MAC_CATEGORY_NETWORK]    = "network",
+#endif
+#ifdef CONFIG_CCSECURITY_MISC
+	[CCS_MAX_MAC_INDEX + CCS_MAC_CATEGORY_MISC]       = "misc",
+#endif
+#ifdef CONFIG_CCSECURITY_IPC
+	[CCS_MAX_MAC_INDEX + CCS_MAC_CATEGORY_IPC]        = "ipc",
+#endif
+#ifdef CONFIG_CCSECURITY_CAPABILITY
+	[CCS_MAX_MAC_INDEX + CCS_MAC_CATEGORY_CAPABILITY] = "capability",
+#endif
+};
+
+/* String table for path operation. */
+static const char * const ccs_path_keyword[CCS_MAX_PATH_OPERATION] = {
+	[CCS_TYPE_EXECUTE]    = "execute",
+	[CCS_TYPE_READ]       = "read",
+	[CCS_TYPE_WRITE]      = "write",
+	[CCS_TYPE_APPEND]     = "append",
+	[CCS_TYPE_UNLINK]     = "unlink",
+#ifdef CONFIG_CCSECURITY_FILE_GETATTR
+	[CCS_TYPE_GETATTR]    = "getattr",
+#endif
+	[CCS_TYPE_RMDIR]      = "rmdir",
+	[CCS_TYPE_TRUNCATE]   = "truncate",
+	[CCS_TYPE_SYMLINK]    = "symlink",
+	[CCS_TYPE_CHROOT]     = "chroot",
+	[CCS_TYPE_UMOUNT]     = "unmount",
+};
+
+#ifdef CONFIG_CCSECURITY_NETWORK
+
+/* String table for socket's operation. */
+static const char * const ccs_socket_keyword[CCS_MAX_NETWORK_OPERATION] = {
+	[CCS_NETWORK_BIND]    = "bind",
+	[CCS_NETWORK_LISTEN]  = "listen",
+	[CCS_NETWORK_CONNECT] = "connect",
+	[CCS_NETWORK_ACCEPT]  = "accept",
+	[CCS_NETWORK_SEND]    = "send",
+#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG
+	[CCS_NETWORK_RECV]    = "recv",
+#endif
+};
+
+/* String table for socket's protocols. */
+static const char * const ccs_proto_keyword[CCS_SOCK_MAX] = {
+	[SOCK_STREAM]    = "stream",
+	[SOCK_DGRAM]     = "dgram",
+	[SOCK_RAW]       = "raw",
+	[SOCK_SEQPACKET] = "seqpacket",
+	[0] = " ", /* Dummy for avoiding NULL pointer dereference. */
+	[4] = " ", /* Dummy for avoiding NULL pointer dereference. */
+};
+
+#endif
+
+/* String table for categories. */
+static const char * const ccs_category_keywords[CCS_MAX_MAC_CATEGORY_INDEX] = {
+	[CCS_MAC_CATEGORY_FILE]       = "file",
+#ifdef CONFIG_CCSECURITY_NETWORK
+	[CCS_MAC_CATEGORY_NETWORK]    = "network",
+#endif
+#ifdef CONFIG_CCSECURITY_MISC
+	[CCS_MAC_CATEGORY_MISC]       = "misc",
+#endif
+#ifdef CONFIG_CCSECURITY_IPC
+	[CCS_MAC_CATEGORY_IPC]        = "ipc",
+#endif
+#ifdef CONFIG_CCSECURITY_CAPABILITY
+	[CCS_MAC_CATEGORY_CAPABILITY] = "capability",
+#endif
+};
+
+/* String table for conditions. */
+static const char * const ccs_condition_keyword[CCS_MAX_CONDITION_KEYWORD] = {
+	[CCS_TASK_UID]             = "task.uid",
+	[CCS_TASK_EUID]            = "task.euid",
+	[CCS_TASK_SUID]            = "task.suid",
+	[CCS_TASK_FSUID]           = "task.fsuid",
+	[CCS_TASK_GID]             = "task.gid",
+	[CCS_TASK_EGID]            = "task.egid",
+	[CCS_TASK_SGID]            = "task.sgid",
+	[CCS_TASK_FSGID]           = "task.fsgid",
+	[CCS_TASK_PID]             = "task.pid",
+	[CCS_TASK_PPID]            = "task.ppid",
+	[CCS_EXEC_ARGC]            = "exec.argc",
+	[CCS_EXEC_ENVC]            = "exec.envc",
+	[CCS_TYPE_IS_SOCKET]       = "socket",
+	[CCS_TYPE_IS_SYMLINK]      = "symlink",
+	[CCS_TYPE_IS_FILE]         = "file",
+	[CCS_TYPE_IS_BLOCK_DEV]    = "block",
+	[CCS_TYPE_IS_DIRECTORY]    = "directory",
+	[CCS_TYPE_IS_CHAR_DEV]     = "char",
+	[CCS_TYPE_IS_FIFO]         = "fifo",
+	[CCS_MODE_SETUID]          = "setuid",
+	[CCS_MODE_SETGID]          = "setgid",
+	[CCS_MODE_STICKY]          = "sticky",
+	[CCS_MODE_OWNER_READ]      = "owner_read",
+	[CCS_MODE_OWNER_WRITE]     = "owner_write",
+	[CCS_MODE_OWNER_EXECUTE]   = "owner_execute",
+	[CCS_MODE_GROUP_READ]      = "group_read",
+	[CCS_MODE_GROUP_WRITE]     = "group_write",
+	[CCS_MODE_GROUP_EXECUTE]   = "group_execute",
+	[CCS_MODE_OTHERS_READ]     = "others_read",
+	[CCS_MODE_OTHERS_WRITE]    = "others_write",
+	[CCS_MODE_OTHERS_EXECUTE]  = "others_execute",
+	[CCS_TASK_TYPE]            = "task.type",
+	[CCS_TASK_EXECUTE_HANDLER] = "execute_handler",
+	[CCS_EXEC_REALPATH]        = "exec.realpath",
+	[CCS_SYMLINK_TARGET]       = "symlink.target",
+	[CCS_PATH1_UID]            = "path1.uid",
+	[CCS_PATH1_GID]            = "path1.gid",
+	[CCS_PATH1_INO]            = "path1.ino",
+	[CCS_PATH1_MAJOR]          = "path1.major",
+	[CCS_PATH1_MINOR]          = "path1.minor",
+	[CCS_PATH1_PERM]           = "path1.perm",
+	[CCS_PATH1_TYPE]           = "path1.type",
+	[CCS_PATH1_DEV_MAJOR]      = "path1.dev_major",
+	[CCS_PATH1_DEV_MINOR]      = "path1.dev_minor",
+	[CCS_PATH2_UID]            = "path2.uid",
+	[CCS_PATH2_GID]            = "path2.gid",
+	[CCS_PATH2_INO]            = "path2.ino",
+	[CCS_PATH2_MAJOR]          = "path2.major",
+	[CCS_PATH2_MINOR]          = "path2.minor",
+	[CCS_PATH2_PERM]           = "path2.perm",
+	[CCS_PATH2_TYPE]           = "path2.type",
+	[CCS_PATH2_DEV_MAJOR]      = "path2.dev_major",
+	[CCS_PATH2_DEV_MINOR]      = "path2.dev_minor",
+	[CCS_PATH1_PARENT_UID]     = "path1.parent.uid",
+	[CCS_PATH1_PARENT_GID]     = "path1.parent.gid",
+	[CCS_PATH1_PARENT_INO]     = "path1.parent.ino",
+	[CCS_PATH1_PARENT_PERM]    = "path1.parent.perm",
+	[CCS_PATH2_PARENT_UID]     = "path2.parent.uid",
+	[CCS_PATH2_PARENT_GID]     = "path2.parent.gid",
+	[CCS_PATH2_PARENT_INO]     = "path2.parent.ino",
+	[CCS_PATH2_PARENT_PERM]    = "path2.parent.perm",
+};
+
+/* String table for PREFERENCE keyword. */
+static const char * const ccs_pref_keywords[CCS_MAX_PREF] = {
+	[CCS_PREF_MAX_AUDIT_LOG]      = "max_audit_log",
+	[CCS_PREF_MAX_LEARNING_ENTRY] = "max_learning_entry",
+	[CCS_PREF_ENFORCING_PENALTY]  = "enforcing_penalty",
+};
+
+/* String table for domain flags. */
+const char * const ccs_dif[CCS_MAX_DOMAIN_INFO_FLAGS] = {
+	[CCS_DIF_QUOTA_WARNED]      = "quota_exceeded\n",
+	[CCS_DIF_TRANSITION_FAILED] = "transition_failed\n",
+};
+
+/* String table for domain transition control keywords. */
+static const char * const ccs_transition_type[CCS_MAX_TRANSITION_TYPE] = {
+	[CCS_TRANSITION_CONTROL_NO_RESET]      = "no_reset_domain ",
+	[CCS_TRANSITION_CONTROL_RESET]         = "reset_domain ",
+	[CCS_TRANSITION_CONTROL_NO_INITIALIZE] = "no_initialize_domain ",
+	[CCS_TRANSITION_CONTROL_INITIALIZE]    = "initialize_domain ",
+	[CCS_TRANSITION_CONTROL_NO_KEEP]       = "no_keep_domain ",
+	[CCS_TRANSITION_CONTROL_KEEP]          = "keep_domain ",
+};
+
+/* String table for grouping keywords. */
+static const char * const ccs_group_name[CCS_MAX_GROUP] = {
+	[CCS_PATH_GROUP]    = "path_group ",
+	[CCS_NUMBER_GROUP]  = "number_group ",
+#ifdef CONFIG_CCSECURITY_NETWORK
+	[CCS_ADDRESS_GROUP] = "address_group ",
+#endif
+};
+
+/* String table for /proc/ccs/stat interface. */
+static const char * const ccs_policy_headers[CCS_MAX_POLICY_STAT] = {
+	[CCS_STAT_POLICY_UPDATES]    = "update:",
+	[CCS_STAT_POLICY_LEARNING]   = "violation in learning mode:",
+	[CCS_STAT_POLICY_PERMISSIVE] = "violation in permissive mode:",
+	[CCS_STAT_POLICY_ENFORCING]  = "violation in enforcing mode:",
+};
+
+/* String table for /proc/ccs/stat interface. */
+static const char * const ccs_memory_headers[CCS_MAX_MEMORY_STAT] = {
+	[CCS_MEMORY_POLICY]     = "policy:",
+	[CCS_MEMORY_AUDIT]      = "audit log:",
+	[CCS_MEMORY_QUERY]      = "query message:",
+};
+
+/***** SECTION2: Structure definition *****/
+
+struct iattr;
+
+/* Structure for query. */
+struct ccs_query {
+	struct list_head list;
+	struct ccs_domain_info *domain;
+	char *query;
+	size_t query_len;
+	unsigned int serial;
+	u8 timer;
+	u8 answer;
+	u8 retry;
+};
+
+/* Structure for audit log. */
+struct ccs_log {
+	struct list_head list;
+	char *log;
+	int size;
+};
+
+/***** SECTION3: Prototype definition section *****/
+
+int ccs_audit_log(struct ccs_request_info *r);
+struct ccs_domain_info *ccs_assign_domain(const char *domainname,
+					  const bool transit);
+u8 ccs_get_config(const u8 profile, const u8 index);
+void ccs_transition_failed(const char *domainname);
+void ccs_write_log(struct ccs_request_info *r, const char *fmt, ...);
+
+static bool ccs_correct_domain(const unsigned char *domainname);
+static bool ccs_correct_path(const char *filename);
+static bool ccs_correct_word(const char *string);
+static bool ccs_correct_word2(const char *string, size_t len);
+static bool ccs_domain_def(const unsigned char *buffer);
+static bool ccs_domain_quota_ok(struct ccs_request_info *r);
+static bool ccs_flush(struct ccs_io_buffer *head);
+static bool ccs_get_audit(const struct ccs_request_info *r);
+static bool ccs_has_more_namespace(struct ccs_io_buffer *head);
+static bool ccs_manager(void);
+static bool ccs_namespace_jump(const char *domainname);
+static bool ccs_parse_argv(char *left, char *right, struct ccs_argv *argv);
+static bool ccs_parse_envp(char *left, char *right, struct ccs_envp *envp);
+static bool ccs_parse_name_union(struct ccs_acl_param *param,
+				 struct ccs_name_union *ptr);
+static bool ccs_parse_name_union_quoted(struct ccs_acl_param *param,
+					struct ccs_name_union *ptr);
+static bool ccs_parse_number_union(struct ccs_acl_param *param,
+				   struct ccs_number_union *ptr);
+static bool ccs_permstr(const char *string, const char *keyword);
+static bool ccs_print_condition(struct ccs_io_buffer *head,
+				const struct ccs_condition *cond);
+static bool ccs_print_entry(struct ccs_io_buffer *head,
+			    const struct ccs_acl_info *acl);
+static bool ccs_print_group(struct ccs_io_buffer *head,
+			    const struct ccs_group *group);
+static bool ccs_read_acl(struct ccs_io_buffer *head, struct list_head *list);
+static bool ccs_read_group(struct ccs_io_buffer *head, const int idx);
+static bool ccs_read_policy(struct ccs_io_buffer *head, const int idx);
+static bool ccs_same_condition(const struct ccs_condition *a,
+			       const struct ccs_condition *b);
+static bool ccs_select_domain(struct ccs_io_buffer *head, const char *data);
+static bool ccs_set_lf(struct ccs_io_buffer *head);
+static bool ccs_str_starts(char **src, const char *find);
+static char *ccs_get_transit_preference(struct ccs_acl_param *param,
+					struct ccs_condition *e);
+static char *ccs_init_log(struct ccs_request_info *r, int len, const char *fmt,
+			  va_list args);
+static char *ccs_print_bprm(struct linux_binprm *bprm,
+			    struct ccs_page_dump *dump);
+static char *ccs_print_header(struct ccs_request_info *r);
+static char *ccs_read_token(struct ccs_acl_param *param);
+static const char *ccs_yesno(const unsigned int value);
+static const struct ccs_path_info *ccs_get_domainname
+(struct ccs_acl_param *param);
+static const struct ccs_path_info *ccs_get_dqword(char *start);
+static int __init ccs_init_module(void);
+static int ccs_delete_domain(char *domainname);
+static int ccs_open(struct inode *inode, struct file *file);
+static int ccs_parse_policy(struct ccs_io_buffer *head, char *line);
+static int ccs_release(struct inode *inode, struct file *file);
+static int ccs_set_mode(char *name, const char *value,
+			struct ccs_profile *profile);
+static int ccs_supervisor(struct ccs_request_info *r, const char *fmt, ...)
+	__printf(2, 3);
+static int ccs_truncate(char *str);
+static int ccs_update_acl(const int size, struct ccs_acl_param *param);
+static int ccs_update_manager_entry(const char *manager, const bool is_delete);
+static int ccs_update_policy(const int size, struct ccs_acl_param *param);
+static int ccs_write_acl(struct ccs_policy_namespace *ns,
+			 struct list_head *list, char *data,
+			 const bool is_delete);
+static int ccs_write_aggregator(struct ccs_acl_param *param);
+static int ccs_write_answer(struct ccs_io_buffer *head);
+static int ccs_write_domain(struct ccs_io_buffer *head);
+static int ccs_write_exception(struct ccs_io_buffer *head);
+static int ccs_write_file(struct ccs_acl_param *param);
+static int ccs_write_group(struct ccs_acl_param *param, const u8 type);
+static int ccs_write_manager(struct ccs_io_buffer *head);
+static int ccs_write_pid(struct ccs_io_buffer *head);
+static int ccs_write_profile(struct ccs_io_buffer *head);
+static int ccs_write_stat(struct ccs_io_buffer *head);
+static int ccs_write_task(struct ccs_acl_param *param);
+static int ccs_write_transition_control(struct ccs_acl_param *param,
+					const u8 type);
+static s8 ccs_find_yesno(const char *string, const char *find);
+static ssize_t ccs_read(struct file *file, char __user *buf, size_t count,
+			loff_t *ppos);
+static ssize_t ccs_read_self(struct file *file, char __user *buf, size_t count,
+			     loff_t *ppos);
+static ssize_t ccs_write(struct file *file, const char __user *buf,
+			 size_t count, loff_t *ppos);
+static struct ccs_condition *ccs_commit_condition(struct ccs_condition *entry);
+static struct ccs_condition *ccs_get_condition(struct ccs_acl_param *param);
+static struct ccs_domain_info *ccs_find_domain(const char *domainname);
+static struct ccs_domain_info *ccs_find_domain_by_qid(unsigned int serial);
+static struct ccs_group *ccs_get_group(struct ccs_acl_param *param,
+				       const u8 idx);
+static struct ccs_policy_namespace *ccs_assign_namespace
+(const char *domainname);
+static struct ccs_policy_namespace *ccs_find_namespace(const char *name,
+						       const unsigned int len);
+static struct ccs_profile *ccs_assign_profile(struct ccs_policy_namespace *ns,
+					      const unsigned int profile);
+static struct ccs_profile *ccs_profile(const u8 profile);
+static u8 ccs_condition_type(const char *word);
+static u8 ccs_make_byte(const u8 c1, const u8 c2, const u8 c3);
+static u8 ccs_parse_ulong(unsigned long *result, char **str);
+static unsigned int ccs_poll(struct file *file, poll_table *wait);
+static void __init ccs_create_entry(const char *name, const umode_t mode,
+				    struct proc_dir_entry *parent,
+				    const u8 key);
+static void __init ccs_load_builtin_policy(void);
+static void __init ccs_policy_io_init(void);
+static void __init ccs_proc_init(void);
+static void ccs_add_entry(char *header);
+static void ccs_addprintf(char *buffer, int len, const char *fmt, ...)
+	__printf(3, 4);
+static void ccs_addprintf(char *buffer, int len, const char *fmt, ...);
+static void ccs_check_profile(void);
+static void ccs_convert_time(time_t time, struct ccs_time *stamp);
+static void ccs_init_policy_namespace(struct ccs_policy_namespace *ns);
+static void ccs_io_printf(struct ccs_io_buffer *head, const char *fmt, ...)
+	__printf(2, 3);
+static void ccs_normalize_line(unsigned char *buffer);
+static void ccs_print_config(struct ccs_io_buffer *head, const u8 config);
+static void ccs_print_name_union(struct ccs_io_buffer *head,
+				 const struct ccs_name_union *ptr);
+static void ccs_print_name_union_quoted(struct ccs_io_buffer *head,
+					const struct ccs_name_union *ptr);
+static void ccs_print_namespace(struct ccs_io_buffer *head);
+static void ccs_print_number_union(struct ccs_io_buffer *head,
+				   const struct ccs_number_union *ptr);
+static void ccs_print_number_union_nospace(struct ccs_io_buffer *head,
+					   const struct ccs_number_union *ptr);
+static void ccs_read_domain(struct ccs_io_buffer *head);
+static void ccs_read_exception(struct ccs_io_buffer *head);
+static void ccs_read_log(struct ccs_io_buffer *head);
+static void ccs_read_manager(struct ccs_io_buffer *head);
+static void ccs_read_pid(struct ccs_io_buffer *head);
+static void ccs_read_profile(struct ccs_io_buffer *head);
+static void ccs_read_query(struct ccs_io_buffer *head);
+static void ccs_read_stat(struct ccs_io_buffer *head);
+static void ccs_read_version(struct ccs_io_buffer *head);
+static void ccs_set_group(struct ccs_io_buffer *head, const char *category);
+static void ccs_set_namespace_cursor(struct ccs_io_buffer *head);
+static void ccs_set_slash(struct ccs_io_buffer *head);
+static void ccs_set_space(struct ccs_io_buffer *head);
+static void ccs_set_string(struct ccs_io_buffer *head, const char *string);
+static void ccs_set_uint(unsigned int *i, const char *string,
+			 const char *find);
+static void ccs_update_stat(const u8 index);
+static void ccs_update_task_domain(struct ccs_request_info *r);
+static void ccs_write_log2(struct ccs_request_info *r, int len,
+			   const char *fmt, va_list args);
+
+#ifdef CONFIG_CCSECURITY_PORTRESERVE
+static bool __ccs_lport_reserved(const u16 port);
+static int ccs_write_reserved_port(struct ccs_acl_param *param);
+#endif
+
+#ifdef CONFIG_CCSECURITY_NETWORK
+static bool ccs_parse_ipaddr_union(struct ccs_acl_param *param,
+				   struct ccs_ipaddr_union *ptr);
+static int ccs_print_ipv4(char *buffer, const unsigned int buffer_len,
+			  const u32 *ip);
+static int ccs_print_ipv6(char *buffer, const unsigned int buffer_len,
+			  const struct in6_addr *ip);
+static int ccs_write_inet_network(struct ccs_acl_param *param);
+static int ccs_write_unix_network(struct ccs_acl_param *param);
+static void ccs_print_ip(char *buf, const unsigned int size,
+			 const struct ccs_ipaddr_union *ptr);
+#endif
+
+#ifdef CONFIG_CCSECURITY_CAPABILITY
+static int ccs_write_capability(struct ccs_acl_param *param);
+#endif
+
+#ifdef CONFIG_CCSECURITY_MISC
+static int ccs_write_misc(struct ccs_acl_param *param);
+#endif
+
+#ifdef CONFIG_CCSECURITY_IPC
+static int ccs_write_ipc(struct ccs_acl_param *param);
+#endif
+
+#ifdef CONFIG_CCSECURITY_TASK_DOMAIN_TRANSITION
+static ssize_t ccs_write_self(struct file *file, const char __user *buf,
+			      size_t count, loff_t *ppos);
+#endif
+
+/***** SECTION4: Standalone functions section *****/
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 25)
+
+/**
+ * fatal_signal_pending - Check whether SIGKILL is pending or not.
+ *
+ * @p: Pointer to "struct task_struct".
+ *
+ * Returns true if SIGKILL is pending on @p, false otherwise.
+ *
+ * This is for compatibility with older kernels.
+ */
+#define fatal_signal_pending(p) (signal_pending(p) &&			\
+				 sigismember(&p->pending.signal, SIGKILL))
+
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0)
+
+/**
+ * __wait_event_interruptible_timeout - Sleep until a condition gets true or a timeout elapses.
+ *
+ * @wq:        The waitqueue to wait on.
+ * @condition: A C expression for the event to wait for.
+ * @ret:       Timeout, in jiffies.
+ *
+ * Returns 0 if the @timeout elapsed, -ERESTARTSYS if it was interrupted by a
+ * signal, and the remaining jiffies otherwise if the condition evaluated to
+ * true before the timeout elapsed.
+ *
+ * This is for compatibility with older kernels.
+ */
+#define __wait_event_interruptible_timeout(wq, condition, ret)		\
+do {									\
+	wait_queue_t __wait;						\
+	init_waitqueue_entry(&__wait, current);				\
+									\
+	add_wait_queue(&wq, &__wait);					\
+	for (;;) {							\
+		set_current_state(TASK_INTERRUPTIBLE);			\
+		if (condition)						\
+			break;						\
+		if (!signal_pending(current)) {				\
+			ret = schedule_timeout(ret);			\
+			if (!ret)					\
+				break;					\
+			continue;					\
+		}							\
+		ret = -ERESTARTSYS;					\
+		break;							\
+	}								\
+	current->state = TASK_RUNNING;					\
+	remove_wait_queue(&wq, &__wait);				\
+} while (0)
+
+/**
+ * wait_event_interruptible_timeout - Sleep until a condition gets true or a timeout elapses.
+ *
+ * @wq:        The waitqueue to wait on.
+ * @condition: A C expression for the event to wait for.
+ * @timeout:   Timeout, in jiffies.
+ *
+ * Returns 0 if the @timeout elapsed, -ERESTARTSYS if it was interrupted by a
+ * signal, and the remaining jiffies otherwise if the condition evaluated to
+ * true before the timeout elapsed.
+ *
+ * This is for compatibility with older kernels.
+ */
+#define wait_event_interruptible_timeout(wq, condition, timeout)	\
+({									\
+	long __ret = timeout;						\
+	if (!(condition))						\
+		__wait_event_interruptible_timeout(wq, condition, __ret); \
+	__ret;								\
+})
+
+#endif
+
+/**
+ * ccs_convert_time - Convert time_t to YYYY/MM/DD hh/mm/ss.
+ *
+ * @time:  Seconds since 1970/01/01 00:00:00.
+ * @stamp: Pointer to "struct ccs_time".
+ *
+ * Returns nothing.
+ *
+ * This function does not handle Y2038 problem.
+ */
+static void ccs_convert_time(time_t time, struct ccs_time *stamp)
+{
+	static const u16 ccs_eom[2][12] = {
+		{ 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 },
+		{ 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 }
+	};
+	u16 y;
+	u8 m;
+	bool r;
+	stamp->sec = time % 60;
+	time /= 60;
+	stamp->min = time % 60;
+	time /= 60;
+	stamp->hour = time % 24;
+	time /= 24;
+	for (y = 1970; ; y++) {
+		const unsigned short days = (y & 3) ? 365 : 366;
+		if (time < days)
+			break;
+		time -= days;
+	}
+	r = (y & 3) == 0;
+	for (m = 0; m < 11 && time >= ccs_eom[r][m]; m++);
+	if (m)
+		time -= ccs_eom[r][m - 1];
+	stamp->year = y;
+	stamp->month = ++m;
+	stamp->day = ++time;
+}
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 4, 23)
+#if !defined(RHEL_VERSION) || RHEL_VERSION != 3
+
+/**
+ * PDE - Get "struct proc_dir_entry".
+ *
+ * @inode: Pointer to "struct inode".
+ *
+ * Returns pointer to "struct proc_dir_entry".
+ *
+ * This is for compatibility with older kernels.
+ */
+static inline struct proc_dir_entry *PDE(const struct inode *inode)
+{
+	return (struct proc_dir_entry *) inode->u.generic_ip;
+}
+
+#endif
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0)
+
+/**
+ * proc_notify_change - Update inode's attributes and reflect to the dentry.
+ *
+ * @dentry: Pointer to "struct dentry".
+ * @iattr:  Pointer to "struct iattr".
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * The 2.4 kernels don't allow chmod()/chown() for files in /proc,
+ * while the 2.6 kernels allow.
+ * To permit management of /proc/ccs/ interface by non-root user,
+ * I modified to allow chmod()/chown() of /proc/ccs/ interface like 2.6 kernels
+ * by adding "struct inode_operations"->setattr hook.
+ */
+static int proc_notify_change(struct dentry *dentry, struct iattr *iattr)
+{
+	struct inode *inode = dentry->d_inode;
+	struct proc_dir_entry *de = PDE(inode);
+	int error;
+
+	error = inode_change_ok(inode, iattr);
+	if (error)
+		goto out;
+
+	error = inode_setattr(inode, iattr);
+	if (error)
+		goto out;
+
+	de->uid = inode->i_uid;
+	de->gid = inode->i_gid;
+	de->mode = inode->i_mode;
+out:
+	return error;
+}
+
+#endif
+
+#ifdef CONFIG_CCSECURITY_NETWORK
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 19) && defined(CONFIG_NET)
+#define ccs_in4_pton in4_pton
+#define ccs_in6_pton in6_pton
+#else
+/*
+ * Routines for parsing IPv4 or IPv6 address.
+ * These are copied from lib/hexdump.c net/core/utils.c .
+ */
+#include <linux/ctype.h>
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 35)
+static int hex_to_bin(char ch)
+{
+	if ((ch >= '0') && (ch <= '9'))
+		return ch - '0';
+	ch = tolower(ch);
+	if ((ch >= 'a') && (ch <= 'f'))
+		return ch - 'a' + 10;
+	return -1;
+}
+#endif
+
+#define IN6PTON_XDIGIT		0x00010000
+#define IN6PTON_DIGIT		0x00020000
+#define IN6PTON_COLON_MASK	0x00700000
+#define IN6PTON_COLON_1		0x00100000	/* single : requested */
+#define IN6PTON_COLON_2		0x00200000	/* second : requested */
+#define IN6PTON_COLON_1_2	0x00400000	/* :: requested */
+#define IN6PTON_DOT		0x00800000	/* . */
+#define IN6PTON_DELIM		0x10000000
+#define IN6PTON_NULL		0x20000000	/* first/tail */
+#define IN6PTON_UNKNOWN		0x40000000
+
+static inline int xdigit2bin(char c, int delim)
+{
+	int val;
+
+	if (c == delim || c == '\0')
+		return IN6PTON_DELIM;
+	if (c == ':')
+		return IN6PTON_COLON_MASK;
+	if (c == '.')
+		return IN6PTON_DOT;
+
+	val = hex_to_bin(c);
+	if (val >= 0)
+		return val | IN6PTON_XDIGIT | (val < 10 ? IN6PTON_DIGIT : 0);
+
+	if (delim == -1)
+		return IN6PTON_DELIM;
+	return IN6PTON_UNKNOWN;
+}
+
+static int ccs_in4_pton(const char *src, int srclen, u8 *dst, int delim,
+			const char **end)
+{
+	const char *s;
+	u8 *d;
+	u8 dbuf[4];
+	int ret = 0;
+	int i;
+	int w = 0;
+
+	if (srclen < 0)
+		srclen = strlen(src);
+	s = src;
+	d = dbuf;
+	i = 0;
+	while (1) {
+		int c;
+		c = xdigit2bin(srclen > 0 ? *s : '\0', delim);
+		if (!(c & (IN6PTON_DIGIT | IN6PTON_DOT | IN6PTON_DELIM |
+			   IN6PTON_COLON_MASK)))
+			goto out;
+		if (c & (IN6PTON_DOT | IN6PTON_DELIM | IN6PTON_COLON_MASK)) {
+			if (w == 0)
+				goto out;
+			*d++ = w & 0xff;
+			w = 0;
+			i++;
+			if (c & (IN6PTON_DELIM | IN6PTON_COLON_MASK)) {
+				if (i != 4)
+					goto out;
+				break;
+			}
+			goto cont;
+		}
+		w = (w * 10) + c;
+		if ((w & 0xffff) > 255)
+			goto out;
+cont:
+		if (i >= 4)
+			goto out;
+		s++;
+		srclen--;
+	}
+	ret = 1;
+	memcpy(dst, dbuf, sizeof(dbuf));
+out:
+	if (end)
+		*end = s;
+	return ret;
+}
+
+static int ccs_in6_pton(const char *src, int srclen, u8 *dst, int delim,
+			const char **end)
+{
+	const char *s, *tok = NULL;
+	u8 *d, *dc = NULL;
+	u8 dbuf[16];
+	int ret = 0;
+	int i;
+	int state = IN6PTON_COLON_1_2 | IN6PTON_XDIGIT | IN6PTON_NULL;
+	int w = 0;
+
+	memset(dbuf, 0, sizeof(dbuf));
+
+	s = src;
+	d = dbuf;
+	if (srclen < 0)
+		srclen = strlen(src);
+
+	while (1) {
+		int c;
+
+		c = xdigit2bin(srclen > 0 ? *s : '\0', delim);
+		if (!(c & state))
+			goto out;
+		if (c & (IN6PTON_DELIM | IN6PTON_COLON_MASK)) {
+			/* process one 16-bit word */
+			if (!(state & IN6PTON_NULL)) {
+				*d++ = (w >> 8) & 0xff;
+				*d++ = w & 0xff;
+			}
+			w = 0;
+			if (c & IN6PTON_DELIM) {
+				/* We've processed last word */
+				break;
+			}
+			/*
+			 * COLON_1 => XDIGIT
+			 * COLON_2 => XDIGIT|DELIM
+			 * COLON_1_2 => COLON_2
+			 */
+			switch (state & IN6PTON_COLON_MASK) {
+			case IN6PTON_COLON_2:
+				dc = d;
+				state = IN6PTON_XDIGIT | IN6PTON_DELIM;
+				if (dc - dbuf >= sizeof(dbuf))
+					state |= IN6PTON_NULL;
+				break;
+			case IN6PTON_COLON_1|IN6PTON_COLON_1_2:
+				state = IN6PTON_XDIGIT | IN6PTON_COLON_2;
+				break;
+			case IN6PTON_COLON_1:
+				state = IN6PTON_XDIGIT;
+				break;
+			case IN6PTON_COLON_1_2:
+				state = IN6PTON_COLON_2;
+				break;
+			default:
+				state = 0;
+			}
+			tok = s + 1;
+			goto cont;
+		}
+
+		if (c & IN6PTON_DOT) {
+			ret = ccs_in4_pton(tok ? tok : s, srclen +
+					   (int)(s - tok), d, delim, &s);
+			if (ret > 0) {
+				d += 4;
+				break;
+			}
+			goto out;
+		}
+
+		w = (w << 4) | (0xff & c);
+		state = IN6PTON_COLON_1 | IN6PTON_DELIM;
+		if (!(w & 0xf000))
+			state |= IN6PTON_XDIGIT;
+		if (!dc && d + 2 < dbuf + sizeof(dbuf)) {
+			state |= IN6PTON_COLON_1_2;
+			state &= ~IN6PTON_DELIM;
+		}
+		if (d + 2 >= dbuf + sizeof(dbuf))
+			state &= ~(IN6PTON_COLON_1|IN6PTON_COLON_1_2);
+cont:
+		if ((dc && d + 4 < dbuf + sizeof(dbuf)) ||
+		    d + 4 == dbuf + sizeof(dbuf))
+			state |= IN6PTON_DOT;
+		if (d >= dbuf + sizeof(dbuf))
+			state &= ~(IN6PTON_XDIGIT|IN6PTON_COLON_MASK);
+		s++;
+		srclen--;
+	}
+
+	i = 15; d--;
+
+	if (dc) {
+		while (d >= dc)
+			dst[i--] = *d--;
+		while (i >= dc - dbuf)
+			dst[i--] = 0;
+		while (i >= 0)
+			dst[i--] = *d--;
+	} else
+		memcpy(dst, dbuf, sizeof(dbuf));
+
+	ret = 1;
+out:
+	if (end)
+		*end = s;
+	return ret;
+}
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 32)
+
+/*
+ * Routines for printing IPv4 or IPv6 address.
+ * These are copied from include/linux/kernel.h include/net/ipv6.h
+ * include/net/addrconf.h lib/hexdump.c lib/vsprintf.c and simplified.
+ */
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 26)
+#if !defined(RHEL_MAJOR) || RHEL_MAJOR != 5 || !defined(RHEL_MINOR) || RHEL_MINOR < 9
+static const char hex_asc[] = "0123456789abcdef";
+#define hex_asc_lo(x)   hex_asc[((x) & 0x0f)]
+#define hex_asc_hi(x)   hex_asc[((x) & 0xf0) >> 4]
+
+static inline char *pack_hex_byte(char *buf, u8 byte)
+{
+	*buf++ = hex_asc_hi(byte);
+	*buf++ = hex_asc_lo(byte);
+	return buf;
+}
+#endif
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 24)
+static inline int ipv6_addr_v4mapped(const struct in6_addr *a)
+{
+	return (a->s6_addr32[0] | a->s6_addr32[1] |
+		(a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0;
+}
+#endif
+
+static inline int ipv6_addr_is_isatap(const struct in6_addr *addr)
+{
+	return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE);
+}
+
+static char *ip4_string(char *p, const u8 *addr)
+{
+	/*
+	 * Since this function is called outside vsnprintf(), I can use
+	 * sprintf() here.
+	 */
+	return p +
+		sprintf(p, "%u.%u.%u.%u", addr[0], addr[1], addr[2], addr[3]);
+}
+
+static char *ip6_compressed_string(char *p, const char *addr)
+{
+	int i, j, range;
+	unsigned char zerolength[8];
+	int longest = 1;
+	int colonpos = -1;
+	u16 word;
+	u8 hi, lo;
+	bool needcolon = false;
+	bool useIPv4;
+	struct in6_addr in6;
+
+	memcpy(&in6, addr, sizeof(struct in6_addr));
+
+	useIPv4 = ipv6_addr_v4mapped(&in6) || ipv6_addr_is_isatap(&in6);
+
+	memset(zerolength, 0, sizeof(zerolength));
+
+	if (useIPv4)
+		range = 6;
+	else
+		range = 8;
+
+	/* find position of longest 0 run */
+	for (i = 0; i < range; i++) {
+		for (j = i; j < range; j++) {
+			if (in6.s6_addr16[j] != 0)
+				break;
+			zerolength[i]++;
+		}
+	}
+	for (i = 0; i < range; i++) {
+		if (zerolength[i] > longest) {
+			longest = zerolength[i];
+			colonpos = i;
+		}
+	}
+	if (longest == 1)		/* don't compress a single 0 */
+		colonpos = -1;
+
+	/* emit address */
+	for (i = 0; i < range; i++) {
+		if (i == colonpos) {
+			if (needcolon || i == 0)
+				*p++ = ':';
+			*p++ = ':';
+			needcolon = false;
+			i += longest - 1;
+			continue;
+		}
+		if (needcolon) {
+			*p++ = ':';
+			needcolon = false;
+		}
+		/* hex u16 without leading 0s */
+		word = ntohs(in6.s6_addr16[i]);
+		hi = word >> 8;
+		lo = word & 0xff;
+		if (hi) {
+			if (hi > 0x0f)
+				p = pack_hex_byte(p, hi);
+			else
+				*p++ = hex_asc_lo(hi);
+			p = pack_hex_byte(p, lo);
+		} else if (lo > 0x0f)
+			p = pack_hex_byte(p, lo);
+		else
+			*p++ = hex_asc_lo(lo);
+		needcolon = true;
+	}
+
+	if (useIPv4) {
+		if (needcolon)
+			*p++ = ':';
+		p = ip4_string(p, &in6.s6_addr[12]);
+	}
+	*p = '\0';
+
+	return p;
+}
+#endif
+
+/**
+ * ccs_print_ipv4 - Print an IPv4 address.
+ *
+ * @buffer:     Buffer to write to.
+ * @buffer_len: Size of @buffer.
+ * @ip:         Pointer to "u32 in network byte order".
+ *
+ * Returns written length.
+ */
+static int ccs_print_ipv4(char *buffer, const unsigned int buffer_len,
+			  const u32 *ip)
+{
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 32)
+	return snprintf(buffer, buffer_len, "%pI4", ip);
+#else
+	char addr[sizeof("255.255.255.255")];
+	ip4_string(addr, (const u8 *) ip);
+	return snprintf(buffer, buffer_len, "%s", addr);
+#endif
+}
+
+/**
+ * ccs_print_ipv6 - Print an IPv6 address.
+ *
+ * @buffer:     Buffer to write to.
+ * @buffer_len: Size of @buffer.
+ * @ip:         Pointer to "struct in6_addr".
+ *
+ * Returns written length.
+ */
+static int ccs_print_ipv6(char *buffer, const unsigned int buffer_len,
+			  const struct in6_addr *ip)
+{
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 32)
+	return snprintf(buffer, buffer_len, "%pI6c", ip);
+#else
+	char addr[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255")];
+	ip6_compressed_string(addr, (const u8 *) ip);
+	return snprintf(buffer, buffer_len, "%s", addr);
+#endif
+}
+
+/**
+ * ccs_print_ip - Print an IP address.
+ *
+ * @buf:  Buffer to write to.
+ * @size: Size of @buf.
+ * @ptr:  Pointer to "struct ipaddr_union".
+ *
+ * Returns nothing.
+ */
+static void ccs_print_ip(char *buf, const unsigned int size,
+			 const struct ccs_ipaddr_union *ptr)
+{
+	int len;
+	if (ptr->is_ipv6)
+		len = ccs_print_ipv6(buf, size, &ptr->ip[0]);
+	else
+		len = ccs_print_ipv4(buf, size, &ptr->ip[0].s6_addr32[0]);
+	if (!memcmp(&ptr->ip[0], &ptr->ip[1], 16) || len >= size / 2)
+		return;
+	buf[len++] = '-';
+	if (ptr->is_ipv6)
+		ccs_print_ipv6(buf + len, size - len, &ptr->ip[1]);
+	else
+		ccs_print_ipv4(buf + len, size - len,
+			       &ptr->ip[1].s6_addr32[0]);
+}
+
+#endif
+
+/***** SECTION5: Variables definition section *****/
+
+/* Permit policy management by non-root user? */
+static bool ccs_manage_by_non_root;
+
+/* Lock for protecting policy. */
+DEFINE_MUTEX(ccs_policy_lock);
+
+/* Has /sbin/init started? */
+bool ccs_policy_loaded;
+
+/* List of namespaces. */
+LIST_HEAD(ccs_namespace_list);
+/* True if namespace other than ccs_kernel_namespace is defined. */
+static bool ccs_namespace_enabled;
+
+/* Initial namespace.*/
+static struct ccs_policy_namespace ccs_kernel_namespace;
+
+/* List of "struct ccs_condition". */
+LIST_HEAD(ccs_condition_list);
+
+#ifdef CONFIG_CCSECURITY_PORTRESERVE
+/* Bitmap for reserved local port numbers.*/
+static u8 ccs_reserved_port_map[8192];
+#endif
+
+/* Wait queue for kernel -> userspace notification. */
+static DECLARE_WAIT_QUEUE_HEAD(ccs_query_wait);
+/* Wait queue for userspace -> kernel notification. */
+static DECLARE_WAIT_QUEUE_HEAD(ccs_answer_wait);
+
+/* The list for "struct ccs_query". */
+static LIST_HEAD(ccs_query_list);
+
+/* Lock for manipulating ccs_query_list. */
+static DEFINE_SPINLOCK(ccs_query_list_lock);
+
+/* Number of "struct file" referring /proc/ccs/query interface. */
+static atomic_t ccs_query_observers = ATOMIC_INIT(0);
+
+/* Wait queue for /proc/ccs/audit. */
+static DECLARE_WAIT_QUEUE_HEAD(ccs_log_wait);
+
+/* The list for "struct ccs_log". */
+static LIST_HEAD(ccs_log);
+
+/* Lock for "struct list_head ccs_log". */
+static DEFINE_SPINLOCK(ccs_log_lock);
+
+/* Length of "stuct list_head ccs_log". */
+static unsigned int ccs_log_count;
+
+/* Timestamp counter for last updated. */
+static unsigned int ccs_stat_updated[CCS_MAX_POLICY_STAT];
+
+/* Counter for number of updates. */
+static unsigned int ccs_stat_modified[CCS_MAX_POLICY_STAT];
+
+/* Operations for /proc/ccs/self_domain interface. */
+static
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 17)
+const
+#endif
+struct file_operations ccs_self_operations = {
+#ifdef CONFIG_CCSECURITY_TASK_DOMAIN_TRANSITION
+	.write = ccs_write_self,
+#endif
+	.read  = ccs_read_self,
+};
+
+/* Operations for /proc/ccs/ interface. */
+static
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 17)
+const
+#endif
+struct file_operations ccs_operations = {
+	.open    = ccs_open,
+	.release = ccs_release,
+	.poll    = ccs_poll,
+	.read    = ccs_read,
+	.write   = ccs_write,
+};
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0)
+
+/* The inode operations for /proc/ccs/ directory. */
+static struct inode_operations ccs_dir_inode_operations;
+
+/* The inode operations for files under /proc/ccs/ directory. */
+static struct inode_operations ccs_file_inode_operations;
+
+#endif
+
+/***** SECTION6: Dependent functions section *****/
+
+/**
+ * list_for_each_cookie - iterate over a list with cookie.
+ *
+ * @pos:  Pointer to "struct list_head".
+ * @head: Pointer to "struct list_head".
+ */
+#define list_for_each_cookie(pos, head)					\
+	for (pos = pos ? pos : srcu_dereference((head)->next, &ccs_ss); \
+	     pos != (head); pos = srcu_dereference(pos->next, &ccs_ss))
+
+/**
+ * ccs_read_token - Read a word from a line.
+ *
+ * @param: Pointer to "struct ccs_acl_param".
+ *
+ * Returns a word on success, "" otherwise.
+ *
+ * To allow the caller to skip NULL check, this function returns "" rather than
+ * NULL if there is no more words to read.
+ */
+static char *ccs_read_token(struct ccs_acl_param *param)
+{
+	char *pos = param->data;
+	char *del = strchr(pos, ' ');
+	if (del)
+		*del++ = '\0';
+	else
+		del = pos + strlen(pos);
+	param->data = del;
+	return pos;
+}
+
+/**
+ * ccs_make_byte - Make byte value from three octal characters.
+ *
+ * @c1: The first character.
+ * @c2: The second character.
+ * @c3: The third character.
+ *
+ * Returns byte value.
+ */
+static u8 ccs_make_byte(const u8 c1, const u8 c2, const u8 c3)
+{
+	return ((c1 - '0') << 6) + ((c2 - '0') << 3) + (c3 - '0');
+}
+
+/**
+ * ccs_correct_word2 - Check whether the given string follows the naming rules.
+ *
+ * @string: The byte sequence to check. Not '\0'-terminated.
+ * @len:    Length of @string.
+ *
+ * Returns true if @string follows the naming rules, false otherwise.
+ */
+static bool ccs_correct_word2(const char *string, size_t len)
+{
+	const char *const start = string;
+	bool in_repetition = false;
+	unsigned char c;
+	unsigned char d;
+	unsigned char e;
+	if (!len)
+		goto out;
+	while (len--) {
+		c = *string++;
+		if (c == '\\') {
+			if (!len--)
+				goto out;
+			c = *string++;
+			switch (c) {
+			case '\\':  /* "\\" */
+				continue;
+			case '$':   /* "\$" */
+			case '+':   /* "\+" */
+			case '?':   /* "\?" */
+			case '*':   /* "\*" */
+			case '@':   /* "\@" */
+			case 'x':   /* "\x" */
+			case 'X':   /* "\X" */
+			case 'a':   /* "\a" */
+			case 'A':   /* "\A" */
+			case '-':   /* "\-" */
+				continue;
+			case '{':   /* "/\{" */
+				if (string - 3 < start || *(string - 3) != '/')
+					break;
+				in_repetition = true;
+				continue;
+			case '}':   /* "\}/" */
+				if (*string != '/')
+					break;
+				if (!in_repetition)
+					break;
+				in_repetition = false;
+				continue;
+			case '0':   /* "\ooo" */
+			case '1':
+			case '2':
+			case '3':
+				if (!len-- || !len--)
+					break;
+				d = *string++;
+				e = *string++;
+				if (d < '0' || d > '7' || e < '0' || e > '7')
+					break;
+				c = ccs_make_byte(c, d, e);
+				if (c <= ' ' || c >= 127)
+					continue;
+			}
+			goto out;
+		} else if (in_repetition && c == '/') {
+			goto out;
+		} else if (c <= ' ' || c >= 127) {
+			goto out;
+		}
+	}
+	if (in_repetition)
+		goto out;
+	return true;
+out:
+	return false;
+}
+
+/**
+ * ccs_correct_word - Check whether the given string follows the naming rules.
+ *
+ * @string: The string to check.
+ *
+ * Returns true if @string follows the naming rules, false otherwise.
+ */
+static bool ccs_correct_word(const char *string)
+{
+	return ccs_correct_word2(string, strlen(string));
+}
+
+/**
+ * ccs_get_group - Allocate memory for "struct ccs_path_group"/"struct ccs_number_group"/"struct ccs_address_group".
+ *
+ * @param: Pointer to "struct ccs_acl_param".
+ * @idx:   Index number.
+ *
+ * Returns pointer to "struct ccs_group" on success, NULL otherwise.
+ */
+static struct ccs_group *ccs_get_group(struct ccs_acl_param *param,
+				       const u8 idx)
+{
+	struct ccs_group e = { };
+	struct ccs_group *group = NULL;
+	struct list_head *list;
+	const char *group_name = ccs_read_token(param);
+	bool found = false;
+	if (!ccs_correct_word(group_name) || idx >= CCS_MAX_GROUP)
+		return NULL;
+	e.group_name = ccs_get_name(group_name);
+	if (!e.group_name)
+		return NULL;
+	if (mutex_lock_interruptible(&ccs_policy_lock))
+		goto out;
+	list = &param->ns->group_list[idx];
+	list_for_each_entry(group, list, head.list) {
+		if (e.group_name != group->group_name ||
+		    atomic_read(&group->head.users) == CCS_GC_IN_PROGRESS)
+			continue;
+		atomic_inc(&group->head.users);
+		found = true;
+		break;
+	}
+	if (!found) {
+		struct ccs_group *entry = ccs_commit_ok(&e, sizeof(e));
+		if (entry) {
+			INIT_LIST_HEAD(&entry->member_list);
+			atomic_set(&entry->head.users, 1);
+			list_add_tail_rcu(&entry->head.list, list);
+			group = entry;
+			found = true;
+		}
+	}
+	mutex_unlock(&ccs_policy_lock);
+out:
+	ccs_put_name(e.group_name);
+	return found ? group : NULL;
+}
+
+/**
+ * ccs_parse_name_union - Parse a ccs_name_union.
+ *
+ * @param: Pointer to "struct ccs_acl_param".
+ * @ptr:   Pointer to "struct ccs_name_union".
+ *
+ * Returns true on success, false otherwise.
+ */
+static bool ccs_parse_name_union(struct ccs_acl_param *param,
+				 struct ccs_name_union *ptr)
+{
+	char *filename;
+	if (param->data[0] == '@') {
+		param->data++;
+		ptr->group = ccs_get_group(param, CCS_PATH_GROUP);
+		return ptr->group != NULL;
+	}
+	filename = ccs_read_token(param);
+	if (!ccs_correct_word(filename))
+		return false;
+	ptr->filename = ccs_get_name(filename);
+	return ptr->filename != NULL;
+}
+
+/**
+ * ccs_parse_ulong - Parse an "unsigned long" value.
+ *
+ * @result: Pointer to "unsigned long".
+ * @str:    Pointer to string to parse.
+ *
+ * Returns one of values in "enum ccs_value_type".
+ *
+ * The @src is updated to point the first character after the value
+ * on success.
+ */
+static u8 ccs_parse_ulong(unsigned long *result, char **str)
+{
+	const char *cp = *str;
+	char *ep;
+	int base = 10;
+	if (*cp == '0') {
+		char c = *(cp + 1);
+		if (c == 'x' || c == 'X') {
+			base = 16;
+			cp += 2;
+		} else if (c >= '0' && c <= '7') {
+			base = 8;
+			cp++;
+		}
+	}
+	*result = simple_strtoul(cp, &ep, base);
+	if (cp == ep)
+		return CCS_VALUE_TYPE_INVALID;
+	*str = ep;
+	switch (base) {
+	case 16:
+		return CCS_VALUE_TYPE_HEXADECIMAL;
+	case 8:
+		return CCS_VALUE_TYPE_OCTAL;
+	default:
+		return CCS_VALUE_TYPE_DECIMAL;
+	}
+}
+
+/**
+ * ccs_parse_number_union - Parse a ccs_number_union.
+ *
+ * @param: Pointer to "struct ccs_acl_param".
+ * @ptr:   Pointer to "struct ccs_number_union".
+ *
+ * Returns true on success, false otherwise.
+ */
+static bool ccs_parse_number_union(struct ccs_acl_param *param,
+				   struct ccs_number_union *ptr)
+{
+	char *data;
+	u8 type;
+	unsigned long v;
+	memset(ptr, 0, sizeof(*ptr));
+	if (param->data[0] == '@') {
+		param->data++;
+		ptr->group = ccs_get_group(param, CCS_NUMBER_GROUP);
+		return ptr->group != NULL;
+	}
+	data = ccs_read_token(param);
+	type = ccs_parse_ulong(&v, &data);
+	if (type == CCS_VALUE_TYPE_INVALID)
+		return false;
+	ptr->values[0] = v;
+	ptr->value_type[0] = type;
+	if (!*data) {
+		ptr->values[1] = v;
+		ptr->value_type[1] = type;
+		return true;
+	}
+	if (*data++ != '-')
+		return false;
+	type = ccs_parse_ulong(&v, &data);
+	if (type == CCS_VALUE_TYPE_INVALID || *data || ptr->values[0] > v)
+		return false;
+	ptr->values[1] = v;
+	ptr->value_type[1] = type;
+	return true;
+}
+
+#ifdef CONFIG_CCSECURITY_NETWORK
+
+/**
+ * ccs_parse_ipaddr_union - Parse an IP address.
+ *
+ * @param: Pointer to "struct ccs_acl_param".
+ * @ptr:   Pointer to "struct ccs_ipaddr_union".
+ *
+ * Returns true on success, false otherwise.
+ */
+static bool ccs_parse_ipaddr_union(struct ccs_acl_param *param,
+				   struct ccs_ipaddr_union *ptr)
+{
+	u8 * const min = ptr->ip[0].in6_u.u6_addr8;
+	u8 * const max = ptr->ip[1].in6_u.u6_addr8;
+	char *address = ccs_read_token(param);
+	const char *end;
+	if (!strchr(address, ':') &&
+	    ccs_in4_pton(address, -1, min, '-', &end) > 0) {
+		ptr->is_ipv6 = false;
+		if (!*end)
+			ptr->ip[1].s6_addr32[0] = ptr->ip[0].s6_addr32[0];
+		else if (*end++ != '-' ||
+			 ccs_in4_pton(end, -1, max, '\0', &end) <= 0 || *end)
+			return false;
+		return true;
+	}
+	if (ccs_in6_pton(address, -1, min, '-', &end) > 0) {
+		ptr->is_ipv6 = true;
+		if (!*end)
+			memmove(max, min, sizeof(u16) * 8);
+		else if (*end++ != '-' ||
+			 ccs_in6_pton(end, -1, max, '\0', &end) <= 0 || *end)
+			return false;
+		return true;
+	}
+	return false;
+}
+
+#endif
+
+/**
+ * ccs_get_dqword - ccs_get_name() for a quoted string.
+ *
+ * @start: String to save.
+ *
+ * Returns pointer to "struct ccs_path_info" on success, NULL otherwise.
+ */
+static const struct ccs_path_info *ccs_get_dqword(char *start)
+{
+	char *cp = start + strlen(start) - 1;
+	if (cp == start || *start++ != '"' || *cp != '"')
+		return NULL;
+	*cp = '\0';
+	if (*start && !ccs_correct_word(start))
+		return NULL;
+	return ccs_get_name(start);
+}
+
+/**
+ * ccs_parse_name_union_quoted - Parse a quoted word.
+ *
+ * @param: Pointer to "struct ccs_acl_param".
+ * @ptr:   Pointer to "struct ccs_name_union".
+ *
+ * Returns true on success, false otherwise.
+ */
+static bool ccs_parse_name_union_quoted(struct ccs_acl_param *param,
+					struct ccs_name_union *ptr)
+{
+	char *filename = param->data;
+	if (*filename == '@')
+		return ccs_parse_name_union(param, ptr);
+	ptr->filename = ccs_get_dqword(filename);
+	return ptr->filename != NULL;
+}
+
+/**
+ * ccs_parse_argv - Parse an argv[] condition part.
+ *
+ * @left:  Lefthand value.
+ * @right: Righthand value.
+ * @argv:  Pointer to "struct ccs_argv".
+ *
+ * Returns true on success, false otherwise.
+ */
+static bool ccs_parse_argv(char *left, char *right, struct ccs_argv *argv)
+{
+	if (ccs_parse_ulong(&argv->index, &left) != CCS_VALUE_TYPE_DECIMAL ||
+	    *left++ != ']' || *left)
+		return false;
+	argv->value = ccs_get_dqword(right);
+	return argv->value != NULL;
+}
+
+/**
+ * ccs_parse_envp - Parse an envp[] condition part.
+ *
+ * @left:  Lefthand value.
+ * @right: Righthand value.
+ * @envp:  Pointer to "struct ccs_envp".
+ *
+ * Returns true on success, false otherwise.
+ */
+static bool ccs_parse_envp(char *left, char *right, struct ccs_envp *envp)
+{
+	const struct ccs_path_info *name;
+	const struct ccs_path_info *value;
+	char *cp = left + strlen(left) - 1;
+	if (*cp-- != ']' || *cp != '"')
+		goto out;
+	*cp = '\0';
+	if (!ccs_correct_word(left))
+		goto out;
+	name = ccs_get_name(left);
+	if (!name)
+		goto out;
+	if (!strcmp(right, "NULL")) {
+		value = NULL;
+	} else {
+		value = ccs_get_dqword(right);
+		if (!value) {
+			ccs_put_name(name);
+			goto out;
+		}
+	}
+	envp->name = name;
+	envp->value = value;
+	return true;
+out:
+	return false;
+}
+
+/**
+ * ccs_same_condition - Check for duplicated "struct ccs_condition" entry.
+ *
+ * @a: Pointer to "struct ccs_condition".
+ * @b: Pointer to "struct ccs_condition".
+ *
+ * Returns true if @a == @b, false otherwise.
+ */
+static bool ccs_same_condition(const struct ccs_condition *a,
+			       const struct ccs_condition *b)
+{
+	return a->size == b->size && a->condc == b->condc &&
+		a->numbers_count == b->numbers_count &&
+		a->names_count == b->names_count &&
+		a->argc == b->argc && a->envc == b->envc &&
+		a->grant_log == b->grant_log &&
+		a->exec_transit == b->exec_transit && a->transit == b->transit
+		&& !memcmp(a + 1, b + 1, a->size - sizeof(*a));
+}
+
+/**
+ * ccs_condition_type - Get condition type.
+ *
+ * @word: Keyword string.
+ *
+ * Returns one of values in "enum ccs_conditions_index" on success,
+ * CCS_MAX_CONDITION_KEYWORD otherwise.
+ */
+static u8 ccs_condition_type(const char *word)
+{
+	u8 i;
+	for (i = 0; i < CCS_MAX_CONDITION_KEYWORD; i++) {
+		if (!strcmp(word, ccs_condition_keyword[i]))
+			break;
+	}
+	return i;
+}
+
+/**
+ * ccs_commit_condition - Commit "struct ccs_condition".
+ *
+ * @entry: Pointer to "struct ccs_condition".
+ *
+ * Returns pointer to "struct ccs_condition" on success, NULL otherwise.
+ *
+ * This function merges duplicated entries. This function returns NULL if
+ * @entry is not duplicated but memory quota for policy has exceeded.
+ */
+static struct ccs_condition *ccs_commit_condition(struct ccs_condition *entry)
+{
+	struct ccs_condition *ptr;
+	bool found = false;
+	if (mutex_lock_interruptible(&ccs_policy_lock)) {
+		dprintk(KERN_WARNING "%u: %s failed\n", __LINE__, __func__);
+		ptr = NULL;
+		found = true;
+		goto out;
+	}
+	list_for_each_entry(ptr, &ccs_condition_list, head.list) {
+		if (!ccs_same_condition(ptr, entry) ||
+		    atomic_read(&ptr->head.users) == CCS_GC_IN_PROGRESS)
+			continue;
+		/* Same entry found. Share this entry. */
+		atomic_inc(&ptr->head.users);
+		found = true;
+		break;
+	}
+	if (!found) {
+		if (ccs_memory_ok(entry, entry->size)) {
+			atomic_set(&entry->head.users, 1);
+			list_add(&entry->head.list, &ccs_condition_list);
+		} else {
+			found = true;
+			ptr = NULL;
+		}
+	}
+	mutex_unlock(&ccs_policy_lock);
+out:
+	if (found) {
+		ccs_del_condition(&entry->head.list);
+		kfree(entry);
+		entry = ptr;
+	}
+	return entry;
+}
+
+/**
+ * ccs_correct_path - Check whether the given pathname follows the naming rules.
+ *
+ * @filename: The pathname to check.
+ *
+ * Returns true if @filename follows the naming rules, false otherwise.
+ */
+static bool ccs_correct_path(const char *filename)
+{
+	return *filename == '/' && ccs_correct_word(filename);
+}
+
+/**
+ * ccs_domain_def - Check whether the given token can be a domainname.
+ *
+ * @buffer: The token to check.
+ *
+ * Returns true if @buffer possibly be a domainname, false otherwise.
+ */
+static bool ccs_domain_def(const unsigned char *buffer)
+{
+	const unsigned char *cp;
+	int len;
+	if (*buffer != '<')
+		return false;
+	cp = strchr(buffer, ' ');
+	if (!cp)
+		len = strlen(buffer);
+	else
+		len = cp - buffer;
+	if (buffer[len - 1] != '>' || !ccs_correct_word2(buffer + 1, len - 2))
+		return false;
+	return true;
+}
+
+/**
+ * ccs_correct_domain - Check whether the given domainname follows the naming rules.
+ *
+ * @domainname: The domainname to check.
+ *
+ * Returns true if @domainname follows the naming rules, false otherwise.
+ */
+static bool ccs_correct_domain(const unsigned char *domainname)
+{
+	if (!domainname || !ccs_domain_def(domainname))
+		return false;
+	domainname = strchr(domainname, ' ');
+	if (!domainname++)
+		return true;
+	while (1) {
+		const unsigned char *cp = strchr(domainname, ' ');
+		if (!cp)
+			break;
+		if (*domainname != '/' ||
+		    !ccs_correct_word2(domainname, cp - domainname))
+			return false;
+		domainname = cp + 1;
+	}
+	return ccs_correct_path(domainname);
+}
+
+/**
+ * ccs_normalize_line - Format string.
+ *
+ * @buffer: The line to normalize.
+ *
+ * Returns nothing.
+ *
+ * Leading and trailing whitespaces are removed.
+ * Multiple whitespaces are packed into single space.
+ */
+static void ccs_normalize_line(unsigned char *buffer)
+{
+	unsigned char *sp = buffer;
+	unsigned char *dp = buffer;
+	bool first = true;
+	while (*sp && (*sp <= ' ' || *sp >= 127))
+		sp++;
+	while (*sp) {
+		if (!first)
+			*dp++ = ' ';
+		first = false;
+		while (*sp > ' ' && *sp < 127)
+			*dp++ = *sp++;
+		while (*sp && (*sp <= ' ' || *sp >= 127))
+			sp++;
+	}
+	*dp = '\0';
+}
+
+/**
+ * ccs_get_domainname - Read a domainname from a line.
+ *
+ * @param: Pointer to "struct ccs_acl_param".
+ *
+ * Returns a domainname on success, NULL otherwise.
+ */
+static const struct ccs_path_info *ccs_get_domainname
+(struct ccs_acl_param *param)
+{
+	char *start = param->data;
+	char *pos = start;
+	while (*pos) {
+		if (*pos++ != ' ' || *pos++ == '/')
+			continue;
+		pos -= 2;
+		*pos++ = '\0';
+		break;
+	}
+	param->data = pos;
+	if (ccs_correct_domain(start))
+		return ccs_get_name(start);
+	return NULL;
+}
+
+/**
+ * ccs_get_transit_preference - Parse domain transition preference for execve().
+ *
+ * @param: Pointer to "struct ccs_acl_param".
+ * @e:     Pointer to "struct ccs_condition".
+ *
+ * Returns the condition string part.
+ */
+static char *ccs_get_transit_preference(struct ccs_acl_param *param,
+					struct ccs_condition *e)
+{
+	char * const pos = param->data;
+	bool flag;
+	if (*pos == '<') {
+		e->transit = ccs_get_domainname(param);
+		goto done;
+	}
+	{
+		char *cp = strchr(pos, ' ');
+		if (cp)
+			*cp = '\0';
+		flag = ccs_correct_path(pos) || !strcmp(pos, "keep") ||
+			!strcmp(pos, "initialize") || !strcmp(pos, "reset") ||
+			!strcmp(pos, "child") || !strcmp(pos, "parent");
+		if (cp)
+			*cp = ' ';
+	}
+	if (!flag)
+		return pos;
+	e->transit = ccs_get_name(ccs_read_token(param));
+done:
+	if (e->transit) {
+		e->exec_transit = true;
+		return param->data;
+	}
+	/*
+	 * Return a bad read-only condition string that will let
+	 * ccs_get_condition() return NULL.
+	 */
+	return "/";
+}
+
+/**
+ * ccs_get_condition - Parse condition part.
+ *
+ * @param: Pointer to "struct ccs_acl_param".
+ *
+ * Returns pointer to "struct ccs_condition" on success, NULL otherwise.
+ */
+struct ccs_condition *ccs_get_condition(struct ccs_acl_param *param)
+{
+	struct ccs_condition *entry = NULL;
+	struct ccs_condition_element *condp = NULL;
+	struct ccs_number_union *numbers_p = NULL;
+	struct ccs_name_union *names_p = NULL;
+	struct ccs_argv *argv = NULL;
+	struct ccs_envp *envp = NULL;
+	struct ccs_condition e = { };
+	char * const start_of_string = ccs_get_transit_preference(param, &e);
+	char * const end_of_string = start_of_string + strlen(start_of_string);
+	char *pos;
+rerun:
+	pos = start_of_string;
+	while (1) {
+		u8 left = -1;
+		u8 right = -1;
+		char *left_word = pos;
+		char *cp;
+		char *right_word;
+		bool is_not;
+		if (!*left_word)
+			break;
+		/*
+		 * Since left-hand condition does not allow use of "path_group"
+		 * or "number_group" and environment variable's names do not
+		 * accept '=', it is guaranteed that the original line consists
+		 * of one or more repetition of $left$operator$right blocks
+		 * where "$left is free from '=' and ' '" and "$operator is
+		 * either '=' or '!='" and "$right is free from ' '".
+		 * Therefore, we can reconstruct the original line at the end
+		 * of dry run even if we overwrite $operator with '\0'.
+		 */
+		cp = strchr(pos, ' ');
+		if (cp) {
+			*cp = '\0'; /* Will restore later. */
+			pos = cp + 1;
+		} else {
+			pos = "";
+		}
+		right_word = strchr(left_word, '=');
+		if (!right_word || right_word == left_word)
+			goto out;
+		is_not = *(right_word - 1) == '!';
+		if (is_not)
+			*(right_word++ - 1) = '\0'; /* Will restore later. */
+		else if (*(right_word + 1) != '=')
+			*right_word++ = '\0'; /* Will restore later. */
+		else
+			goto out;
+		dprintk(KERN_WARNING "%u: <%s>%s=<%s>\n", __LINE__, left_word,
+			is_not ? "!" : "", right_word);
+		if (!strcmp(left_word, "grant_log")) {
+			if (entry) {
+				if (is_not ||
+				    entry->grant_log != CCS_GRANTLOG_AUTO)
+					goto out;
+				else if (!strcmp(right_word, "yes"))
+					entry->grant_log = CCS_GRANTLOG_YES;
+				else if (!strcmp(right_word, "no"))
+					entry->grant_log = CCS_GRANTLOG_NO;
+				else
+					goto out;
+			}
+			continue;
+		}
+		if (!strcmp(left_word, "auto_domain_transition")) {
+			if (entry) {
+				if (is_not || entry->transit)
+					goto out;
+				entry->transit = ccs_get_dqword(right_word);
+				if (!entry->transit ||
+				    (entry->transit->name[0] != '/' &&
+				     !ccs_domain_def(entry->transit->name)))
+					goto out;
+			}
+			continue;
+		}
+		if (!strncmp(left_word, "exec.argv[", 10)) {
+			if (!argv) {
+				e.argc++;
+				e.condc++;
+			} else {
+				e.argc--;
+				e.condc--;
+				left = CCS_ARGV_ENTRY;
+				argv->is_not = is_not;
+				if (!ccs_parse_argv(left_word + 10,
+						    right_word, argv++))
+					goto out;
+			}
+			goto store_value;
+		}
+		if (!strncmp(left_word, "exec.envp[\"", 11)) {
+			if (!envp) {
+				e.envc++;
+				e.condc++;
+			} else {
+				e.envc--;
+				e.condc--;
+				left = CCS_ENVP_ENTRY;
+				envp->is_not = is_not;
+				if (!ccs_parse_envp(left_word + 11,
+						    right_word, envp++))
+					goto out;
+			}
+			goto store_value;
+		}
+		left = ccs_condition_type(left_word);
+		dprintk(KERN_WARNING "%u: <%s> left=%u\n", __LINE__, left_word,
+			left);
+		if (left == CCS_MAX_CONDITION_KEYWORD) {
+			if (!numbers_p) {
+				e.numbers_count++;
+			} else {
+				e.numbers_count--;
+				left = CCS_NUMBER_UNION;
+				param->data = left_word;
+				if (*left_word == '@' ||
+				    !ccs_parse_number_union(param,
+							    numbers_p++))
+					goto out;
+			}
+		}
+		if (!condp)
+			e.condc++;
+		else
+			e.condc--;
+		if (left == CCS_EXEC_REALPATH || left == CCS_SYMLINK_TARGET) {
+			if (!names_p) {
+				e.names_count++;
+			} else {
+				e.names_count--;
+				right = CCS_NAME_UNION;
+				param->data = right_word;
+				if (!ccs_parse_name_union_quoted(param,
+								 names_p++))
+					goto out;
+			}
+			goto store_value;
+		}
+		right = ccs_condition_type(right_word);
+		if (right == CCS_MAX_CONDITION_KEYWORD) {
+			if (!numbers_p) {
+				e.numbers_count++;
+			} else {
+				e.numbers_count--;
+				right = CCS_NUMBER_UNION;
+				param->data = right_word;
+				if (!ccs_parse_number_union(param,
+							    numbers_p++))
+					goto out;
+			}
+		}
+store_value:
+		if (!condp) {
+			dprintk(KERN_WARNING "%u: dry_run left=%u right=%u "
+				"match=%u\n", __LINE__, left, right, !is_not);
+			continue;
+		}
+		condp->left = left;
+		condp->right = right;
+		condp->equals = !is_not;
+		dprintk(KERN_WARNING "%u: left=%u right=%u match=%u\n",
+			__LINE__, condp->left, condp->right,
+			condp->equals);
+		condp++;
+	}
+	dprintk(KERN_INFO "%u: cond=%u numbers=%u names=%u ac=%u ec=%u\n",
+		__LINE__, e.condc, e.numbers_count, e.names_count, e.argc,
+		e.envc);
+	if (entry) {
+		BUG_ON(e.names_count | e.numbers_count | e.argc | e.envc |
+		       e.condc);
+		return ccs_commit_condition(entry);
+	}
+	e.size = sizeof(*entry)
+		+ e.condc * sizeof(struct ccs_condition_element)
+		+ e.numbers_count * sizeof(struct ccs_number_union)
+		+ e.names_count * sizeof(struct ccs_name_union)
+		+ e.argc * sizeof(struct ccs_argv)
+		+ e.envc * sizeof(struct ccs_envp);
+	entry = kzalloc(e.size, CCS_GFP_FLAGS);
+	if (!entry)
+		goto out2;
+	*entry = e;
+	e.transit = NULL;
+	condp = (struct ccs_condition_element *) (entry + 1);
+	numbers_p = (struct ccs_number_union *) (condp + e.condc);
+	names_p = (struct ccs_name_union *) (numbers_p + e.numbers_count);
+	argv = (struct ccs_argv *) (names_p + e.names_count);
+	envp = (struct ccs_envp *) (argv + e.argc);
+	{
+		bool flag = false;
+		for (pos = start_of_string; pos < end_of_string; pos++) {
+			if (*pos)
+				continue;
+			if (flag) /* Restore " ". */
+				*pos = ' ';
+			else if (*(pos + 1) == '=') /* Restore "!=". */
+				*pos = '!';
+			else /* Restore "=". */
+				*pos = '=';
+			flag = !flag;
+		}
+	}
+	goto rerun;
+out:
+	dprintk(KERN_WARNING "%u: %s failed\n", __LINE__, __func__);
+	if (entry) {
+		ccs_del_condition(&entry->head.list);
+		kfree(entry);
+	}
+out2:
+	ccs_put_name(e.transit);
+	return NULL;
+}
+
+/**
+ * ccs_yesno - Return "yes" or "no".
+ *
+ * @value: Bool value.
+ *
+ * Returns "yes" if @value is not 0, "no" otherwise.
+ */
+static const char *ccs_yesno(const unsigned int value)
+{
+	return value ? "yes" : "no";
+}
+
+/**
+ * ccs_addprintf - strncat()-like-snprintf().
+ *
+ * @buffer: Buffer to write to. Must be '\0'-terminated.
+ * @len:    Size of @buffer.
+ * @fmt:    The printf()'s format string, followed by parameters.
+ *
+ * Returns nothing.
+ */
+static void ccs_addprintf(char *buffer, int len, const char *fmt, ...)
+{
+	va_list args;
+	const int pos = strlen(buffer);
+	va_start(args, fmt);
+	vsnprintf(buffer + pos, len - pos - 1, fmt, args);
+	va_end(args);
+}
+
+/**
+ * ccs_flush - Flush queued string to userspace's buffer.
+ *
+ * @head: Pointer to "struct ccs_io_buffer".
+ *
+ * Returns true if all data was flushed, false otherwise.
+ */
+static bool ccs_flush(struct ccs_io_buffer *head)
+{
+	while (head->r.w_pos) {
+		const char *w = head->r.w[0];
+		size_t len = strlen(w);
+		if (len) {
+			if (len > head->read_user_buf_avail)
+				len = head->read_user_buf_avail;
+			if (!len)
+				return false;
+			if (copy_to_user(head->read_user_buf, w, len))
+				return false;
+			head->read_user_buf_avail -= len;
+			head->read_user_buf += len;
+			w += len;
+		}
+		head->r.w[0] = w;
+		if (*w)
+			return false;
+		/* Add '\0' for audit logs and query. */
+		if (head->type == CCS_AUDIT || head->type == CCS_QUERY) {
+			if (!head->read_user_buf_avail ||
+			    copy_to_user(head->read_user_buf, "", 1))
+				return false;
+			head->read_user_buf_avail--;
+			head->read_user_buf++;
+		}
+		head->r.w_pos--;
+		for (len = 0; len < head->r.w_pos; len++)
+			head->r.w[len] = head->r.w[len + 1];
+	}
+	head->r.avail = 0;
+	return true;
+}
+
+/**
+ * ccs_set_string - Queue string to "struct ccs_io_buffer" structure.
+ *
+ * @head:   Pointer to "struct ccs_io_buffer".
+ * @string: String to print.
+ *
+ * Returns nothing.
+ *
+ * Note that @string has to be kept valid until @head is kfree()d.
+ * This means that char[] allocated on stack memory cannot be passed to
+ * this function. Use ccs_io_printf() for char[] allocated on stack memory.
+ */
+static void ccs_set_string(struct ccs_io_buffer *head, const char *string)
+{
+	if (head->r.w_pos < CCS_MAX_IO_READ_QUEUE) {
+		head->r.w[head->r.w_pos++] = string;
+		ccs_flush(head);
+	} else
+		printk(KERN_WARNING "Too many words in a line.\n");
+}
+
+/**
+ * ccs_io_printf - printf() to "struct ccs_io_buffer" structure.
+ *
+ * @head: Pointer to "struct ccs_io_buffer".
+ * @fmt:  The printf()'s format string, followed by parameters.
+ *
+ * Returns nothing.
+ */
+static void ccs_io_printf(struct ccs_io_buffer *head, const char *fmt, ...)
+{
+	va_list args;
+	size_t len;
+	size_t pos = head->r.avail;
+	int size = head->readbuf_size - pos;
+	if (size <= 0)
+		return;
+	va_start(args, fmt);
+	len = vsnprintf(head->read_buf + pos, size, fmt, args) + 1;
+	va_end(args);
+	if (pos + len >= head->readbuf_size) {
+		printk(KERN_WARNING "Too many words in a line.\n");
+		return;
+	}
+	head->r.avail += len;
+	ccs_set_string(head, head->read_buf + pos);
+}
+
+/**
+ * ccs_set_space - Put a space to "struct ccs_io_buffer" structure.
+ *
+ * @head: Pointer to "struct ccs_io_buffer".
+ *
+ * Returns nothing.
+ */
+static void ccs_set_space(struct ccs_io_buffer *head)
+{
+	ccs_set_string(head, " ");
+}
+
+/**
+ * ccs_set_lf - Put a line feed to "struct ccs_io_buffer" structure.
+ *
+ * @head: Pointer to "struct ccs_io_buffer".
+ *
+ * Returns true if all data was flushed, false otherwise.
+ */
+static bool ccs_set_lf(struct ccs_io_buffer *head)
+{
+	ccs_set_string(head, "\n");
+	return !head->r.w_pos;
+}
+
+/**
+ * ccs_set_slash - Put a shash to "struct ccs_io_buffer" structure.
+ *
+ * @head: Pointer to "struct ccs_io_buffer".
+ *
+ * Returns nothing.
+ */
+static void ccs_set_slash(struct ccs_io_buffer *head)
+{
+	ccs_set_string(head, "/");
+}
+
+/**
+ * ccs_init_policy_namespace - Initialize namespace.
+ *
+ * @ns: Pointer to "struct ccs_policy_namespace".
+ *
+ * Returns nothing.
+ */
+static void ccs_init_policy_namespace(struct ccs_policy_namespace *ns)
+{
+	unsigned int idx;
+	for (idx = 0; idx < CCS_MAX_ACL_GROUPS; idx++)
+		INIT_LIST_HEAD(&ns->acl_group[idx]);
+	for (idx = 0; idx < CCS_MAX_GROUP; idx++)
+		INIT_LIST_HEAD(&ns->group_list[idx]);
+	for (idx = 0; idx < CCS_MAX_POLICY; idx++)
+		INIT_LIST_HEAD(&ns->policy_list[idx]);
+	ns->profile_version = 20150505;
+	ccs_namespace_enabled = !list_empty(&ccs_namespace_list);
+	list_add_tail_rcu(&ns->namespace_list, &ccs_namespace_list);
+}
+
+/**
+ * ccs_print_namespace - Print namespace header.
+ *
+ * @head: Pointer to "struct ccs_io_buffer".
+ *
+ * Returns nothing.
+ */
+static void ccs_print_namespace(struct ccs_io_buffer *head)
+{
+	if (!ccs_namespace_enabled)
+		return;
+	ccs_set_string(head,
+		       container_of(head->r.ns, struct ccs_policy_namespace,
+				    namespace_list)->name);
+	ccs_set_space(head);
+}
+
+/**
+ * ccs_assign_profile - Create a new profile.
+ *
+ * @ns:      Pointer to "struct ccs_policy_namespace".
+ * @profile: Profile number to create.
+ *
+ * Returns pointer to "struct ccs_profile" on success, NULL otherwise.
+ */
+static struct ccs_profile *ccs_assign_profile(struct ccs_policy_namespace *ns,
+					      const unsigned int profile)
+{
+	struct ccs_profile *ptr;
+	struct ccs_profile *entry;
+	if (profile >= CCS_MAX_PROFILES)
+		return NULL;
+	ptr = ns->profile_ptr[profile];
+	if (ptr)
+		return ptr;
+	entry = kzalloc(sizeof(*entry), CCS_GFP_FLAGS);
+	if (mutex_lock_interruptible(&ccs_policy_lock))
+		goto out;
+	ptr = ns->profile_ptr[profile];
+	if (!ptr && ccs_memory_ok(entry, sizeof(*entry))) {
+		ptr = entry;
+		ptr->default_config = CCS_CONFIG_DISABLED |
+			CCS_CONFIG_WANT_GRANT_LOG | CCS_CONFIG_WANT_REJECT_LOG;
+		memset(ptr->config, CCS_CONFIG_USE_DEFAULT,
+		       sizeof(ptr->config));
+		ptr->pref[CCS_PREF_MAX_AUDIT_LOG] =
+			CONFIG_CCSECURITY_MAX_AUDIT_LOG;
+		ptr->pref[CCS_PREF_MAX_LEARNING_ENTRY] =
+			CONFIG_CCSECURITY_MAX_ACCEPT_ENTRY;
+		mb(); /* Avoid out-of-order execution. */
+		ns->profile_ptr[profile] = ptr;
+		entry = NULL;
+	}
+	mutex_unlock(&ccs_policy_lock);
+out:
+	kfree(entry);
+	return ptr;
+}
+
+/**
+ * ccs_check_profile - Check all profiles currently assigned to domains are defined.
+ *
+ * Returns nothing.
+ */
+static void ccs_check_profile(void)
+{
+	struct ccs_domain_info *domain;
+	const int idx = ccs_read_lock();
+	ccs_policy_loaded = true;
+	printk(KERN_INFO "CCSecurity: 1.8.4   2015/05/05\n");
+	list_for_each_entry_srcu(domain, &ccs_domain_list, list, &ccs_ss) {
+		const u8 profile = domain->profile;
+		struct ccs_policy_namespace *ns = domain->ns;
+		if (ns->profile_version == 20100903) {
+			static bool done;
+			if (!done)
+				printk(KERN_INFO "Converting profile version "
+				       "from %u to %u.\n", 20100903, 20150505);
+			done = true;
+			ns->profile_version = 20150505;
+		}
+		if (ns->profile_version != 20150505)
+			printk(KERN_ERR
+			       "Profile version %u is not supported.\n",
+			       ns->profile_version);
+		else if (!ns->profile_ptr[profile])
+			printk(KERN_ERR
+			       "Profile %u (used by '%s') is not defined.\n",
+			       profile, domain->domainname->name);
+		else
+			continue;
+		printk(KERN_ERR
+		       "Userland tools for TOMOYO 1.8 must be installed and "
+		       "policy must be initialized.\n");
+		printk(KERN_ERR "Please see http://tomoyo.osdn.jp/1.8/ "
+		       "for more information.\n");
+		panic("STOP!");
+	}
+	ccs_read_unlock(idx);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 2, 0) && defined(CONFIG_SECURITY)
+	ccsecurity_exports.add_hooks();
+#endif
+	printk(KERN_INFO "Mandatory Access Control activated.\n");
+}
+
+/**
+ * ccs_profile - Find a profile.
+ *
+ * @profile: Profile number to find.
+ *
+ * Returns pointer to "struct ccs_profile".
+ */
+static struct ccs_profile *ccs_profile(const u8 profile)
+{
+	static struct ccs_profile ccs_null_profile;
+	struct ccs_profile *ptr = ccs_current_namespace()->
+		profile_ptr[profile];
+	if (!ptr)
+		ptr = &ccs_null_profile;
+	return ptr;
+}
+
+/**
+ * ccs_get_config - Get config for specified profile's specified functionality.
+ *
+ * @profile: Profile number.
+ * @index:   Index number of functionality.
+ *
+ * Returns config.
+ *
+ * First, check for CONFIG::category::functionality.
+ * If CONFIG::category::functionality is set to use default, then check
+ * CONFIG::category. If CONFIG::category is set to use default, then use
+ * CONFIG. CONFIG cannot be set to use default.
+ */
+u8 ccs_get_config(const u8 profile, const u8 index)
+{
+	u8 config;
+	const struct ccs_profile *p;
+	if (!ccs_policy_loaded)
+		return CCS_CONFIG_DISABLED;
+	p = ccs_profile(profile);
+	config = p->config[index];
+	if (config == CCS_CONFIG_USE_DEFAULT)
+		config = p->config[ccs_index2category[index]
+				   + CCS_MAX_MAC_INDEX];
+	if (config == CCS_CONFIG_USE_DEFAULT)
+		config = p->default_config;
+	return config;
+}
+
+/**
+ * ccs_find_yesno - Find values for specified keyword.
+ *
+ * @string: String to check.
+ * @find:   Name of keyword.
+ *
+ * Returns 1 if "@find=yes" was found, 0 if "@find=no" was found, -1 otherwise.
+ */
+static s8 ccs_find_yesno(const char *string, const char *find)
+{
+	const char *cp = strstr(string, find);
+	if (cp) {
+		cp += strlen(find);
+		if (!strncmp(cp, "=yes", 4))
+			return 1;
+		else if (!strncmp(cp, "=no", 3))
+			return 0;
+	}
+	return -1;
+}
+
+/**
+ * ccs_set_uint - Set value for specified preference.
+ *
+ * @i:      Pointer to "unsigned int".
+ * @string: String to check.
+ * @find:   Name of keyword.
+ *
+ * Returns nothing.
+ */
+static void ccs_set_uint(unsigned int *i, const char *string, const char *find)
+{
+	const char *cp = strstr(string, find);
+	if (cp)
+		sscanf(cp + strlen(find), "=%u", i);
+}
+
+/**
+ * ccs_str_starts - Check whether the given string starts with the given keyword.
+ *
+ * @src:  Pointer to pointer to the string.
+ * @find: Pointer to the keyword.
+ *
+ * Returns true if @src starts with @find, false otherwise.
+ *
+ * The @src is updated to point the first character after the @find
+ * if @src starts with @find.
+ */
+static bool ccs_str_starts(char **src, const char *find)
+{
+	const int len = strlen(find);
+	char *tmp = *src;
+	if (strncmp(tmp, find, len))
+		return false;
+	tmp += len;
+	*src = tmp;
+	return true;
+}
+
+/**
+ * ccs_print_group - Print group's name.
+ *
+ * @head:  Pointer to "struct ccs_io_buffer".
+ * @group: Pointer to "struct ccsgroup". Maybe NULL.
+ *
+ * Returns true if @group is not NULL. false otherwise.
+ */
+static bool ccs_print_group(struct ccs_io_buffer *head,
+			    const struct ccs_group *group)
+{
+	if (group) {
+		ccs_set_string(head, "@");
+		ccs_set_string(head, group->group_name->name);
+		return true;
+	}
+	return false;
+}
+
+/**
+ * ccs_set_mode - Set mode for specified profile.
+ *
+ * @name:    Name of functionality.
+ * @value:   Mode for @name.
+ * @profile: Pointer to "struct ccs_profile".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int ccs_set_mode(char *name, const char *value,
+			struct ccs_profile *profile)
+{
+	u8 i;
+	u8 config;
+	if (!strcmp(name, "CONFIG")) {
+		i = CCS_MAX_MAC_INDEX + CCS_MAX_MAC_CATEGORY_INDEX;
+		config = profile->default_config;
+	} else if (ccs_str_starts(&name, "CONFIG::")) {
+		config = 0;
+		for (i = 0; i < CCS_MAX_MAC_INDEX + CCS_MAX_MAC_CATEGORY_INDEX;
+		     i++) {
+			int len = 0;
+			if (i < CCS_MAX_MAC_INDEX) {
+				const u8 c = ccs_index2category[i];
+				const char *category =
+					ccs_category_keywords[c];
+				len = strlen(category);
+				if (strncmp(name, category, len) ||
+				    name[len++] != ':' || name[len++] != ':')
+					continue;
+			}
+			if (strcmp(name + len, ccs_mac_keywords[i]))
+				continue;
+			config = profile->config[i];
+			break;
+		}
+		if (i == CCS_MAX_MAC_INDEX + CCS_MAX_MAC_CATEGORY_INDEX)
+			return -EINVAL;
+	} else {
+		return -EINVAL;
+	}
+	if (strstr(value, "use_default")) {
+		config = CCS_CONFIG_USE_DEFAULT;
+	} else {
+		u8 mode;
+		for (mode = 0; mode < CCS_CONFIG_MAX_MODE; mode++)
+			if (strstr(value, ccs_mode[mode]))
+				/*
+				 * Update lower 3 bits in order to distinguish
+				 * 'config' from 'CCS_CONFIG_USE_DEAFULT'.
+				 */
+				config = (config & ~7) | mode;
+		if (config != CCS_CONFIG_USE_DEFAULT) {
+			switch (ccs_find_yesno(value, "grant_log")) {
+			case 1:
+				config |= CCS_CONFIG_WANT_GRANT_LOG;
+				break;
+			case 0:
+				config &= ~CCS_CONFIG_WANT_GRANT_LOG;
+				break;
+			}
+			switch (ccs_find_yesno(value, "reject_log")) {
+			case 1:
+				config |= CCS_CONFIG_WANT_REJECT_LOG;
+				break;
+			case 0:
+				config &= ~CCS_CONFIG_WANT_REJECT_LOG;
+				break;
+			}
+		}
+	}
+	if (i < CCS_MAX_MAC_INDEX + CCS_MAX_MAC_CATEGORY_INDEX)
+		profile->config[i] = config;
+	else if (config != CCS_CONFIG_USE_DEFAULT)
+		profile->default_config = config;
+	return 0;
+}
+
+/**
+ * ccs_write_profile - Write profile table.
+ *
+ * @head: Pointer to "struct ccs_io_buffer".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int ccs_write_profile(struct ccs_io_buffer *head)
+{
+	char *data = head->write_buf;
+	unsigned int i;
+	char *cp;
+	struct ccs_profile *profile;
+	if (sscanf(data, "PROFILE_VERSION=%u", &head->w.ns->profile_version)
+	    == 1)
+		return 0;
+	i = simple_strtoul(data, &cp, 10);
+	if (*cp != '-')
+		return -EINVAL;
+	data = cp + 1;
+	profile = ccs_assign_profile(head->w.ns, i);
+	if (!profile)
+		return -EINVAL;
+	cp = strchr(data, '=');
+	if (!cp)
+		return -EINVAL;
+	*cp++ = '\0';
+	if (!strcmp(data, "COMMENT")) {
+		static DEFINE_SPINLOCK(lock);
+		const struct ccs_path_info *new_comment = ccs_get_name(cp);
+		const struct ccs_path_info *old_comment;
+		if (!new_comment)
+			return -ENOMEM;
+		spin_lock(&lock);
+		old_comment = profile->comment;
+		profile->comment = new_comment;
+		spin_unlock(&lock);
+		ccs_put_name(old_comment);
+		return 0;
+	}
+	if (!strcmp(data, "PREFERENCE")) {
+		for (i = 0; i < CCS_MAX_PREF; i++)
+			ccs_set_uint(&profile->pref[i], cp,
+				     ccs_pref_keywords[i]);
+		return 0;
+	}
+	return ccs_set_mode(data, cp, profile);
+}
+
+/**
+ * ccs_print_config - Print mode for specified functionality.
+ *
+ * @head:   Pointer to "struct ccs_io_buffer".
+ * @config: Mode for that functionality.
+ *
+ * Returns nothing.
+ *
+ * Caller prints functionality's name.
+ */
+static void ccs_print_config(struct ccs_io_buffer *head, const u8 config)
+{
+	ccs_io_printf(head, "={ mode=%s grant_log=%s reject_log=%s }\n",
+		      ccs_mode[config & 3],
+		      ccs_yesno(config & CCS_CONFIG_WANT_GRANT_LOG),
+		      ccs_yesno(config & CCS_CONFIG_WANT_REJECT_LOG));
+}
+
+/**
+ * ccs_read_profile - Read profile table.
+ *
+ * @head: Pointer to "struct ccs_io_buffer".
+ *
+ * Returns nothing.
+ */
+static void ccs_read_profile(struct ccs_io_buffer *head)
+{
+	u8 index;
+	struct ccs_policy_namespace *ns = container_of(head->r.ns, typeof(*ns),
+						       namespace_list);
+	const struct ccs_profile *profile;
+	if (head->r.eof)
+		return;
+next:
+	index = head->r.index;
+	profile = ns->profile_ptr[index];
+	switch (head->r.step) {
+	case 0:
+		ccs_print_namespace(head);
+		ccs_io_printf(head, "PROFILE_VERSION=%u\n",
+			      ns->profile_version);
+		head->r.step++;
+		break;
+	case 1:
+		for ( ; head->r.index < CCS_MAX_PROFILES; head->r.index++)
+			if (ns->profile_ptr[head->r.index])
+				break;
+		if (head->r.index == CCS_MAX_PROFILES) {
+			head->r.eof = true;
+			return;
+		}
+		head->r.step++;
+		break;
+	case 2:
+		{
+			u8 i;
+			const struct ccs_path_info *comment = profile->comment;
+			ccs_print_namespace(head);
+			ccs_io_printf(head, "%u-COMMENT=", index);
+			ccs_set_string(head, comment ? comment->name : "");
+			ccs_set_lf(head);
+			ccs_print_namespace(head);
+			ccs_io_printf(head, "%u-PREFERENCE={ ", index);
+			for (i = 0; i < CCS_MAX_PREF; i++)
+				ccs_io_printf(head, "%s=%u ",
+					      ccs_pref_keywords[i],
+					      profile->pref[i]);
+			ccs_set_string(head, "}\n");
+			head->r.step++;
+		}
+		break;
+	case 3:
+		{
+			ccs_print_namespace(head);
+			ccs_io_printf(head, "%u-%s", index, "CONFIG");
+			ccs_print_config(head, profile->default_config);
+			head->r.bit = 0;
+			head->r.step++;
+		}
+		break;
+	case 4:
+		for ( ; head->r.bit < CCS_MAX_MAC_INDEX
+			      + CCS_MAX_MAC_CATEGORY_INDEX; head->r.bit++) {
+			const u8 i = head->r.bit;
+			const u8 config = profile->config[i];
+			if (config == CCS_CONFIG_USE_DEFAULT)
+				continue;
+			ccs_print_namespace(head);
+			if (i < CCS_MAX_MAC_INDEX)
+				ccs_io_printf(head, "%u-CONFIG::%s::%s", index,
+					      ccs_category_keywords
+					      [ccs_index2category[i]],
+					      ccs_mac_keywords[i]);
+			else
+				ccs_io_printf(head, "%u-CONFIG::%s", index,
+					      ccs_mac_keywords[i]);
+			ccs_print_config(head, config);
+			head->r.bit++;
+			break;
+		}
+		if (head->r.bit == CCS_MAX_MAC_INDEX
+		    + CCS_MAX_MAC_CATEGORY_INDEX) {
+			head->r.index++;
+			head->r.step = 1;
+		}
+		break;
+	}
+	if (ccs_flush(head))
+		goto next;
+}
+
+/**
+ * ccs_update_policy - Update an entry for exception policy.
+ *
+ * @size:  Size of new entry in bytes.
+ * @param: Pointer to "struct ccs_acl_param".
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds ccs_read_lock().
+ */
+static int ccs_update_policy(const int size, struct ccs_acl_param *param)
+{
+	struct ccs_acl_head *new_entry = &param->e.acl_head;
+	int error = param->is_delete ? -ENOENT : -ENOMEM;
+	struct ccs_acl_head *entry;
+	struct list_head *list = param->list;
+	BUG_ON(size < sizeof(*entry));
+	if (mutex_lock_interruptible(&ccs_policy_lock))
+		return -ENOMEM;
+	list_for_each_entry_srcu(entry, list, list, &ccs_ss) {
+		if (entry->is_deleted == CCS_GC_IN_PROGRESS)
+			continue;
+		if (memcmp(entry + 1, new_entry + 1, size - sizeof(*entry)))
+			continue;
+		entry->is_deleted = param->is_delete;
+		error = 0;
+		break;
+	}
+	if (error && !param->is_delete) {
+		entry = ccs_commit_ok(new_entry, size);
+		if (entry) {
+			list_add_tail_rcu(&entry->list, list);
+			error = 0;
+		}
+	}
+	mutex_unlock(&ccs_policy_lock);
+	return error;
+}
+
+/**
+ * ccs_update_manager_entry - Add a manager entry.
+ *
+ * @manager:   The path to manager or the domainnamme.
+ * @is_delete: True if it is a delete request.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int ccs_update_manager_entry(const char *manager,
+				    const bool is_delete)
+{
+	struct ccs_acl_param param = {
+		/* .ns = &ccs_kernel_namespace, */
+		.is_delete = is_delete,
+		.list = &ccs_kernel_namespace.policy_list[CCS_ID_MANAGER],
+	};
+	struct ccs_manager *e = &param.e.manager;
+	int error = is_delete ? -ENOENT : -ENOMEM;
+	/* Forced zero clear for using memcmp() at ccs_update_policy(). */
+	memset(&param.e, 0, sizeof(param.e));
+	if (!ccs_correct_domain(manager) && !ccs_correct_word(manager))
+		return -EINVAL;
+	e->manager = ccs_get_name(manager);
+	if (e->manager) {
+		error = ccs_update_policy(sizeof(*e), &param);
+		ccs_put_name(e->manager);
+	}
+	return error;
+}
+
+/**
+ * ccs_write_manager - Write manager policy.
+ *
+ * @head: Pointer to "struct ccs_io_buffer".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int ccs_write_manager(struct ccs_io_buffer *head)
+{
+	const char *data = head->write_buf;
+	if (!strcmp(data, "manage_by_non_root")) {
+		ccs_manage_by_non_root = !head->w.is_delete;
+		return 0;
+	}
+	return ccs_update_manager_entry(data, head->w.is_delete);
+}
+
+/**
+ * ccs_read_manager - Read manager policy.
+ *
+ * @head: Pointer to "struct ccs_io_buffer".
+ *
+ * Returns nothing.
+ *
+ * Caller holds ccs_read_lock().
+ */
+static void ccs_read_manager(struct ccs_io_buffer *head)
+{
+	if (head->r.eof)
+		return;
+	list_for_each_cookie(head->r.acl, &ccs_kernel_namespace.
+			     policy_list[CCS_ID_MANAGER]) {
+		struct ccs_manager *ptr =
+			list_entry(head->r.acl, typeof(*ptr), head.list);
+		if (ptr->head.is_deleted)
+			continue;
+		if (!ccs_flush(head))
+			return;
+		ccs_set_string(head, ptr->manager->name);
+		ccs_set_lf(head);
+	}
+	head->r.eof = true;
+}
+
+/**
+ * ccs_manager - Check whether the current process is a policy manager.
+ *
+ * Returns true if the current process is permitted to modify policy
+ * via /proc/ccs/ interface.
+ *
+ * Caller holds ccs_read_lock().
+ */
+static bool ccs_manager(void)
+{
+	struct ccs_manager *ptr;
+	struct ccs_path_info exe;
+	struct ccs_security *task = ccs_current_security();
+	const struct ccs_path_info *domainname
+		= ccs_current_domain()->domainname;
+	bool found = false;
+	if (!ccs_policy_loaded)
+		return true;
+	if (task->ccs_flags & CCS_TASK_IS_MANAGER)
+		return true;
+	if (!ccs_manage_by_non_root &&
+	    (!uid_eq(current_uid(), GLOBAL_ROOT_UID) ||
+	     !uid_eq(current_euid(), GLOBAL_ROOT_UID)))
+		return false;
+	exe.name = ccs_get_exe();
+	if (!exe.name)
+		return false;
+	ccs_fill_path_info(&exe);
+	list_for_each_entry_srcu(ptr, &ccs_kernel_namespace.
+				 policy_list[CCS_ID_MANAGER], head.list,
+				 &ccs_ss) {
+		if (ptr->head.is_deleted)
+			continue;
+		if (ccs_pathcmp(domainname, ptr->manager) &&
+		    ccs_pathcmp(&exe, ptr->manager))
+			continue;
+		/* Set manager flag. */
+		task->ccs_flags |= CCS_TASK_IS_MANAGER;
+		found = true;
+		break;
+	}
+	if (!found) { /* Reduce error messages. */
+		static pid_t ccs_last_pid;
+		const pid_t pid = current->pid;
+		if (ccs_last_pid != pid) {
+			printk(KERN_WARNING "%s ( %s ) is not permitted to "
+			       "update policies.\n", domainname->name,
+			       exe.name);
+			ccs_last_pid = pid;
+		}
+	}
+	kfree(exe.name);
+	return found;
+}
+
+/**
+ * ccs_find_domain - Find a domain by the given name.
+ *
+ * @domainname: The domainname to find.
+ *
+ * Returns pointer to "struct ccs_domain_info" if found, NULL otherwise.
+ *
+ * Caller holds ccs_read_lock().
+ */
+static struct ccs_domain_info *ccs_find_domain(const char *domainname)
+{
+	struct ccs_domain_info *domain;
+	struct ccs_path_info name;
+	name.name = domainname;
+	ccs_fill_path_info(&name);
+	list_for_each_entry_srcu(domain, &ccs_domain_list, list, &ccs_ss) {
+		if (!domain->is_deleted &&
+		    !ccs_pathcmp(&name, domain->domainname))
+			return domain;
+	}
+	return NULL;
+}
+
+/**
+ * ccs_select_domain - Parse select command.
+ *
+ * @head: Pointer to "struct ccs_io_buffer".
+ * @data: String to parse.
+ *
+ * Returns true on success, false otherwise.
+ *
+ * Caller holds ccs_read_lock().
+ */
+static bool ccs_select_domain(struct ccs_io_buffer *head, const char *data)
+{
+	unsigned int pid;
+	struct ccs_domain_info *domain = NULL;
+	bool global_pid = false;
+	if (strncmp(data, "select ", 7))
+		return false;
+	data += 7;
+	if (sscanf(data, "pid=%u", &pid) == 1 ||
+	    (global_pid = true, sscanf(data, "global-pid=%u", &pid) == 1)) {
+		struct task_struct *p;
+		ccs_tasklist_lock();
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 24)
+		if (global_pid)
+			p = ccsecurity_exports.find_task_by_pid_ns(pid,
+							       &init_pid_ns);
+		else
+			p = ccsecurity_exports.find_task_by_vpid(pid);
+#else
+		p = find_task_by_pid(pid);
+#endif
+		if (p)
+			domain = ccs_task_domain(p);
+		ccs_tasklist_unlock();
+	} else if (!strncmp(data, "domain=", 7)) {
+		if (*(data + 7) == '<')
+			domain = ccs_find_domain(data + 7);
+	} else if (sscanf(data, "Q=%u", &pid) == 1) {
+		domain = ccs_find_domain_by_qid(pid);
+	} else
+		return false;
+	head->w.domain = domain;
+	/* Accessing read_buf is safe because head->io_sem is held. */
+	if (!head->read_buf)
+		return true; /* Do nothing if open(O_WRONLY). */
+	memset(&head->r, 0, sizeof(head->r));
+	head->r.print_this_domain_only = true;
+	if (domain)
+		head->r.domain = &domain->list;
+	else
+		head->r.eof = true;
+	ccs_io_printf(head, "# select %s\n", data);
+	if (domain && domain->is_deleted)
+		ccs_set_string(head, "# This is a deleted domain.\n");
+	return true;
+}
+
+/**
+ * ccs_update_acl - Update "struct ccs_acl_info" entry.
+ *
+ * @size:  Size of new entry in bytes.
+ * @param: Pointer to "struct ccs_acl_param".
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds ccs_read_lock().
+ */
+static int ccs_update_acl(const int size, struct ccs_acl_param *param)
+{
+	struct ccs_acl_info *new_entry = &param->e.acl_info;
+	const bool is_delete = param->is_delete;
+	int error = is_delete ? -ENOENT : -ENOMEM;
+	struct ccs_acl_info *entry;
+	struct list_head * const list = param->list;
+	BUG_ON(size < sizeof(*entry));
+	if (param->data[0]) {
+		new_entry->cond = ccs_get_condition(param);
+		if (!new_entry->cond)
+			return -EINVAL;
+		/*
+		 * Domain transition preference is allowed for only
+		 * "file execute"/"task auto_execute_handler"/
+		 * "task denied_auto_execute_handler" entries.
+		 */
+		if (new_entry->cond->exec_transit &&
+		    !(new_entry->type == CCS_TYPE_PATH_ACL &&
+		      new_entry->perm == 1 << CCS_TYPE_EXECUTE)
+#ifdef CONFIG_CCSECURITY_TASK_EXECUTE_HANDLER
+		    && new_entry->type != CCS_TYPE_AUTO_EXECUTE_HANDLER &&
+		    new_entry->type != CCS_TYPE_DENIED_EXECUTE_HANDLER
+#endif
+		    )
+			return -EINVAL;
+	}
+	if (mutex_lock_interruptible(&ccs_policy_lock))
+		return -ENOMEM;
+	list_for_each_entry_srcu(entry, list, list, &ccs_ss) {
+		if (entry->is_deleted == CCS_GC_IN_PROGRESS)
+			continue;
+		if (entry->type != new_entry->type ||
+		    entry->cond != new_entry->cond ||
+		    memcmp(entry + 1, new_entry + 1, size - sizeof(*entry)))
+			continue;
+		if (is_delete)
+			entry->perm &= ~new_entry->perm;
+		else
+			entry->perm |= new_entry->perm;
+		entry->is_deleted = !entry->perm;
+		error = 0;
+		break;
+	}
+	if (error && !is_delete) {
+		entry = ccs_commit_ok(new_entry, size);
+		if (entry) {
+			list_add_tail_rcu(&entry->list, list);
+			error = 0;
+		}
+	}
+	mutex_unlock(&ccs_policy_lock);
+	return error;
+}
+
+/**
+ * ccs_permstr - Find permission keywords.
+ *
+ * @string: String representation for permissions in foo/bar/buz format.
+ * @keyword: Keyword to find from @string/
+ *
+ * Returns ture if @keyword was found in @string, false otherwise.
+ *
+ * This function assumes that strncmp(w1, w2, strlen(w1)) != 0 if w1 != w2.
+ */
+static bool ccs_permstr(const char *string, const char *keyword)
+{
+	const char *cp = strstr(string, keyword);
+	if (cp)
+		return cp == string || *(cp - 1) == '/';
+	return false;
+}
+
+/**
+ * ccs_write_task - Update task related list.
+ *
+ * @param: Pointer to "struct ccs_acl_param".
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds ccs_read_lock().
+ */
+static int ccs_write_task(struct ccs_acl_param *param)
+{
+	int error;
+	const bool is_auto = ccs_str_starts(&param->data,
+					    "auto_domain_transition ");
+	if (!is_auto && !ccs_str_starts(&param->data,
+					"manual_domain_transition ")) {
+#ifdef CONFIG_CCSECURITY_TASK_EXECUTE_HANDLER
+		struct ccs_handler_acl *e = &param->e.handler_acl;
+		char *handler;
+		if (ccs_str_starts(&param->data, "auto_execute_handler "))
+			e->head.type = CCS_TYPE_AUTO_EXECUTE_HANDLER;
+		else if (ccs_str_starts(&param->data,
+					"denied_execute_handler "))
+			e->head.type = CCS_TYPE_DENIED_EXECUTE_HANDLER;
+		else
+			return -EINVAL;
+		handler = ccs_read_token(param);
+		if (!ccs_correct_path(handler))
+			return -EINVAL;
+		e->handler = ccs_get_name(handler);
+		if (!e->handler)
+			return -ENOMEM;
+		if (e->handler->is_patterned)
+			return -EINVAL; /* No patterns allowed. */
+		return ccs_update_acl(sizeof(*e), param);
+#else
+		error = -EINVAL;
+#endif
+	} else {
+#ifdef CONFIG_CCSECURITY_TASK_DOMAIN_TRANSITION
+		struct ccs_task_acl *e = &param->e.task_acl;
+		e->head.type = is_auto ?
+			CCS_TYPE_AUTO_TASK_ACL : CCS_TYPE_MANUAL_TASK_ACL;
+		e->domainname = ccs_get_domainname(param);
+		if (!e->domainname)
+			return -EINVAL;
+		return ccs_update_acl(sizeof(*e), param);
+#else
+		error = -EINVAL;
+#endif
+	}
+	return error;
+}
+
+#ifdef CONFIG_CCSECURITY_NETWORK
+
+/**
+ * ccs_write_inet_network - Write "struct ccs_inet_acl" list.
+ *
+ * @param: Pointer to "struct ccs_acl_param".
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds ccs_read_lock().
+ */
+static int ccs_write_inet_network(struct ccs_acl_param *param)
+{
+	struct ccs_inet_acl *e = &param->e.inet_acl;
+	u8 type;
+	const char *protocol = ccs_read_token(param);
+	const char *operation = ccs_read_token(param);
+	e->head.type = CCS_TYPE_INET_ACL;
+	for (type = 0; type < CCS_SOCK_MAX; type++)
+		if (!strcmp(protocol, ccs_proto_keyword[type]))
+			break;
+	if (type == CCS_SOCK_MAX)
+		return -EINVAL;
+	e->protocol = type;
+	e->head.perm = 0;
+	for (type = 0; type < CCS_MAX_NETWORK_OPERATION; type++)
+		if (ccs_permstr(operation, ccs_socket_keyword[type]))
+			e->head.perm |= 1 << type;
+	if (!e->head.perm)
+		return -EINVAL;
+	if (param->data[0] == '@') {
+		param->data++;
+		e->address.group = ccs_get_group(param, CCS_ADDRESS_GROUP);
+		if (!e->address.group)
+			return -ENOMEM;
+	} else {
+		if (!ccs_parse_ipaddr_union(param, &e->address))
+			return -EINVAL;
+	}
+	if (!ccs_parse_number_union(param, &e->port) ||
+	    e->port.values[1] > 65535)
+		return -EINVAL;
+	return ccs_update_acl(sizeof(*e), param);
+}
+
+/**
+ * ccs_write_unix_network - Write "struct ccs_unix_acl" list.
+ *
+ * @param: Pointer to "struct ccs_acl_param".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int ccs_write_unix_network(struct ccs_acl_param *param)
+{
+	struct ccs_unix_acl *e = &param->e.unix_acl;
+	u8 type;
+	const char *protocol = ccs_read_token(param);
+	const char *operation = ccs_read_token(param);
+	e->head.type = CCS_TYPE_UNIX_ACL;
+	for (type = 0; type < CCS_SOCK_MAX; type++)
+		if (!strcmp(protocol, ccs_proto_keyword[type]))
+			break;
+	if (type == CCS_SOCK_MAX)
+		return -EINVAL;
+	e->protocol = type;
+	e->head.perm = 0;
+	for (type = 0; type < CCS_MAX_NETWORK_OPERATION; type++)
+		if (ccs_permstr(operation, ccs_socket_keyword[type]))
+			e->head.perm |= 1 << type;
+	if (!e->head.perm)
+		return -EINVAL;
+	if (!ccs_parse_name_union(param, &e->name))
+		return -EINVAL;
+	return ccs_update_acl(sizeof(*e), param);
+}
+
+#endif
+
+/**
+ * ccs_write_file - Update file related list.
+ *
+ * @param: Pointer to "struct ccs_acl_param".
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds ccs_read_lock().
+ */
+static int ccs_write_file(struct ccs_acl_param *param)
+{
+	u16 perm = 0;
+	u8 type;
+	const char *operation = ccs_read_token(param);
+	for (type = 0; type < CCS_MAX_PATH_OPERATION; type++)
+		if (ccs_permstr(operation, ccs_path_keyword[type]))
+			perm |= 1 << type;
+	if (perm) {
+		struct ccs_path_acl *e = &param->e.path_acl;
+		e->head.type = CCS_TYPE_PATH_ACL;
+		e->head.perm = perm;
+		if (!ccs_parse_name_union(param, &e->name))
+			return -EINVAL;
+		return ccs_update_acl(sizeof(*e), param);
+	}
+	for (type = 0; type < CCS_MAX_PATH2_OPERATION; type++)
+		if (ccs_permstr(operation, ccs_mac_keywords[ccs_pp2mac[type]]))
+			perm |= 1 << type;
+	if (perm) {
+		struct ccs_path2_acl *e = &param->e.path2_acl;
+		e->head.type = CCS_TYPE_PATH2_ACL;
+		e->head.perm = perm;
+		if (!ccs_parse_name_union(param, &e->name1) ||
+		    !ccs_parse_name_union(param, &e->name2))
+			return -EINVAL;
+		return ccs_update_acl(sizeof(*e), param);
+	}
+	for (type = 0; type < CCS_MAX_PATH_NUMBER_OPERATION; type++)
+		if (ccs_permstr(operation, ccs_mac_keywords[ccs_pn2mac[type]]))
+			perm |= 1 << type;
+	if (perm) {
+		struct ccs_path_number_acl *e = &param->e.path_number_acl;
+		e->head.type = CCS_TYPE_PATH_NUMBER_ACL;
+		e->head.perm = perm;
+		if (!ccs_parse_name_union(param, &e->name) ||
+		    !ccs_parse_number_union(param, &e->number))
+			return -EINVAL;
+		return ccs_update_acl(sizeof(*e), param);
+	}
+	for (type = 0; type < CCS_MAX_MKDEV_OPERATION; type++)
+		if (ccs_permstr(operation,
+				ccs_mac_keywords[ccs_pnnn2mac[type]]))
+			perm |= 1 << type;
+	if (perm) {
+		struct ccs_mkdev_acl *e = &param->e.mkdev_acl;
+		e->head.type = CCS_TYPE_MKDEV_ACL;
+		e->head.perm = perm;
+		if (!ccs_parse_name_union(param, &e->name) ||
+		    !ccs_parse_number_union(param, &e->mode) ||
+		    !ccs_parse_number_union(param, &e->major) ||
+		    !ccs_parse_number_union(param, &e->minor))
+			return -EINVAL;
+		return ccs_update_acl(sizeof(*e), param);
+	}
+	if (ccs_permstr(operation, ccs_mac_keywords[CCS_MAC_FILE_MOUNT])) {
+		struct ccs_mount_acl *e = &param->e.mount_acl;
+		e->head.type = CCS_TYPE_MOUNT_ACL;
+		if (!ccs_parse_name_union(param, &e->dev_name) ||
+		    !ccs_parse_name_union(param, &e->dir_name) ||
+		    !ccs_parse_name_union(param, &e->fs_type) ||
+		    !ccs_parse_number_union(param, &e->flags))
+			return -EINVAL;
+		return ccs_update_acl(sizeof(*e), param);
+	}
+	return -EINVAL;
+}
+
+#ifdef CONFIG_CCSECURITY_MISC
+
+/**
+ * ccs_write_misc - Update environment variable list.
+ *
+ * @param: Pointer to "struct ccs_acl_param".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int ccs_write_misc(struct ccs_acl_param *param)
+{
+	if (ccs_str_starts(&param->data, "env ")) {
+		struct ccs_env_acl *e = &param->e.env_acl;
+		const char *data = ccs_read_token(param);
+		e->head.type = CCS_TYPE_ENV_ACL;
+		if (!ccs_correct_word(data) || strchr(data, '='))
+			return -EINVAL;
+		e->env = ccs_get_name(data);
+		if (!e->env)
+			return -ENOMEM;
+		return ccs_update_acl(sizeof(*e), param);
+	}
+	return -EINVAL;
+}
+
+#endif
+
+#ifdef CONFIG_CCSECURITY_IPC
+
+/**
+ * ccs_write_ipc - Update "struct ccs_signal_acl" list.
+ *
+ * @param: Pointer to "struct ccs_acl_param".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int ccs_write_ipc(struct ccs_acl_param *param)
+{
+	struct ccs_signal_acl *e = &param->e.signal_acl;
+	e->head.type = CCS_TYPE_SIGNAL_ACL;
+	if (!ccs_parse_number_union(param, &e->sig))
+		return -EINVAL;
+	e->domainname = ccs_get_domainname(param);
+	if (!e->domainname)
+		return -EINVAL;
+	return ccs_update_acl(sizeof(*e), param);
+}
+
+#endif
+
+#ifdef CONFIG_CCSECURITY_CAPABILITY
+
+/**
+ * ccs_write_capability - Write "struct ccs_capability_acl" list.
+ *
+ * @param: Pointer to "struct ccs_acl_param".
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds ccs_read_lock().
+ */
+static int ccs_write_capability(struct ccs_acl_param *param)
+{
+	struct ccs_capability_acl *e = &param->e.capability_acl;
+	const char *operation = ccs_read_token(param);
+	u8 type;
+	e->head.type = CCS_TYPE_CAPABILITY_ACL;
+	for (type = 0; type < CCS_MAX_CAPABILITY_INDEX; type++) {
+		if (strcmp(operation, ccs_mac_keywords[ccs_c2mac[type]]))
+			continue;
+		e->operation = type;
+		return ccs_update_acl(sizeof(*e), param);
+	}
+	return -EINVAL;
+}
+
+#endif
+
+/**
+ * ccs_write_acl - Write "struct ccs_acl_info" list.
+ *
+ * @ns:        Pointer to "struct ccs_policy_namespace".
+ * @list:      Pointer to "struct list_head".
+ * @data:      Policy to be interpreted.
+ * @is_delete: True if it is a delete request.
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds ccs_read_lock().
+ */
+static int ccs_write_acl(struct ccs_policy_namespace *ns,
+			 struct list_head *list, char *data,
+			 const bool is_delete)
+{
+	struct ccs_acl_param param = {
+		.ns = ns,
+		.list = list,
+		.data = data,
+		.is_delete = is_delete,
+	};
+	static const struct {
+		const char *keyword;
+		int (*write) (struct ccs_acl_param *);
+	} ccs_callback[] = {
+		{ "file ", ccs_write_file },
+#ifdef CONFIG_CCSECURITY_NETWORK
+		{ "network inet ", ccs_write_inet_network },
+		{ "network unix ", ccs_write_unix_network },
+#endif
+#ifdef CONFIG_CCSECURITY_MISC
+		{ "misc ", ccs_write_misc },
+#endif
+#ifdef CONFIG_CCSECURITY_CAPABILITY
+		{ "capability ", ccs_write_capability },
+#endif
+#ifdef CONFIG_CCSECURITY_IPC
+		{ "ipc signal ", ccs_write_ipc },
+#endif
+		{ "task ", ccs_write_task },
+	};
+	u8 i;
+	/* Forced zero clear for using memcmp() at ccs_update_acl(). */
+	memset(&param.e, 0, sizeof(param.e));
+	param.e.acl_info.perm = 1;
+	for (i = 0; i < ARRAY_SIZE(ccs_callback); i++) {
+		int error;
+		if (!ccs_str_starts(&param.data, ccs_callback[i].keyword))
+			continue;
+		error = ccs_callback[i].write(&param);
+		ccs_del_acl(&param.e.acl_info.list);
+		return error;
+	}
+	return -EINVAL;
+}
+
+/**
+ * ccs_delete_domain - Delete a domain.
+ *
+ * @domainname: The name of domain.
+ *
+ * Returns 0.
+ */
+static int ccs_delete_domain(char *domainname)
+{
+	struct ccs_domain_info *domain;
+	struct ccs_path_info name;
+	name.name = domainname;
+	ccs_fill_path_info(&name);
+	if (mutex_lock_interruptible(&ccs_policy_lock))
+		return 0;
+	/* Is there an active domain? */
+	list_for_each_entry_srcu(domain, &ccs_domain_list, list, &ccs_ss) {
+		/* Never delete ccs_kernel_domain. */
+		if (domain == &ccs_kernel_domain)
+			continue;
+		if (domain->is_deleted ||
+		    ccs_pathcmp(domain->domainname, &name))
+			continue;
+		domain->is_deleted = true;
+		break;
+	}
+	mutex_unlock(&ccs_policy_lock);
+	return 0;
+}
+
+/**
+ * ccs_write_domain - Write domain policy.
+ *
+ * @head: Pointer to "struct ccs_io_buffer".
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds ccs_read_lock().
+ */
+static int ccs_write_domain(struct ccs_io_buffer *head)
+{
+	char *data = head->write_buf;
+	struct ccs_policy_namespace *ns;
+	struct ccs_domain_info *domain = head->w.domain;
+	const bool is_delete = head->w.is_delete;
+	const bool is_select = !is_delete && ccs_str_starts(&data, "select ");
+	unsigned int idx;
+	if (*data == '<') {
+		domain = NULL;
+		if (is_delete)
+			ccs_delete_domain(data);
+		else if (is_select)
+			domain = ccs_find_domain(data);
+		else
+			domain = ccs_assign_domain(data, false);
+		head->w.domain = domain;
+		return 0;
+	}
+	if (!domain)
+		return -EINVAL;
+	ns = domain->ns;
+	if (sscanf(data, "use_profile %u\n", &idx) == 1 &&
+	    idx < CCS_MAX_PROFILES) {
+		if (!ccs_policy_loaded || ns->profile_ptr[(u8) idx])
+			if (!is_delete)
+				domain->profile = (u8) idx;
+		return 0;
+	}
+	if (sscanf(data, "use_group %u\n", &idx) == 1 &&
+	    idx < CCS_MAX_ACL_GROUPS) {
+		if (!is_delete)
+			set_bit(idx, domain->group);
+		else
+			clear_bit(idx, domain->group);
+		return 0;
+	}
+	for (idx = 0; idx < CCS_MAX_DOMAIN_INFO_FLAGS; idx++) {
+		const char *cp = ccs_dif[idx];
+		if (strncmp(data, cp, strlen(cp) - 1))
+			continue;
+		domain->flags[idx] = !is_delete;
+		return 0;
+	}
+	return ccs_write_acl(ns, &domain->acl_info_list, data, is_delete);
+}
+
+/**
+ * ccs_print_name_union - Print a ccs_name_union.
+ *
+ * @head: Pointer to "struct ccs_io_buffer".
+ * @ptr:  Pointer to "struct ccs_name_union".
+ *
+ * Returns nothing.
+ */
+static void ccs_print_name_union(struct ccs_io_buffer *head,
+				 const struct ccs_name_union *ptr)
+{
+	ccs_set_space(head);
+	if (!ccs_print_group(head, ptr->group))
+		ccs_set_string(head, ptr->filename->name);
+}
+
+/**
+ * ccs_print_name_union_quoted - Print a ccs_name_union with a quote.
+ *
+ * @head: Pointer to "struct ccs_io_buffer".
+ * @ptr:  Pointer to "struct ccs_name_union".
+ *
+ * Returns nothing.
+ */
+static void ccs_print_name_union_quoted(struct ccs_io_buffer *head,
+					const struct ccs_name_union *ptr)
+{
+	if (!ccs_print_group(head, ptr->group)) {
+		ccs_set_string(head, "\"");
+		ccs_set_string(head, ptr->filename->name);
+		ccs_set_string(head, "\"");
+	}
+}
+
+/**
+ * ccs_print_number_union_nospace - Print a ccs_number_union without a space.
+ *
+ * @head: Pointer to "struct ccs_io_buffer".
+ * @ptr:  Pointer to "struct ccs_number_union".
+ *
+ * Returns nothing.
+ */
+static void ccs_print_number_union_nospace(struct ccs_io_buffer *head,
+					   const struct ccs_number_union *ptr)
+{
+	if (!ccs_print_group(head, ptr->group)) {
+		int i;
+		unsigned long min = ptr->values[0];
+		const unsigned long max = ptr->values[1];
+		u8 min_type = ptr->value_type[0];
+		const u8 max_type = ptr->value_type[1];
+		char buffer[128];
+		buffer[0] = '\0';
+		for (i = 0; i < 2; i++) {
+			switch (min_type) {
+			case CCS_VALUE_TYPE_HEXADECIMAL:
+				ccs_addprintf(buffer, sizeof(buffer), "0x%lX",
+					      min);
+				break;
+			case CCS_VALUE_TYPE_OCTAL:
+				ccs_addprintf(buffer, sizeof(buffer), "0%lo",
+					      min);
+				break;
+			default:
+				ccs_addprintf(buffer, sizeof(buffer), "%lu",
+					      min);
+				break;
+			}
+			if (min == max && min_type == max_type)
+				break;
+			ccs_addprintf(buffer, sizeof(buffer), "-");
+			min_type = max_type;
+			min = max;
+		}
+		ccs_io_printf(head, "%s", buffer);
+	}
+}
+
+/**
+ * ccs_print_number_union - Print a ccs_number_union.
+ *
+ * @head: Pointer to "struct ccs_io_buffer".
+ * @ptr:  Pointer to "struct ccs_number_union".
+ *
+ * Returns nothing.
+ */
+static void ccs_print_number_union(struct ccs_io_buffer *head,
+				   const struct ccs_number_union *ptr)
+{
+	ccs_set_space(head);
+	ccs_print_number_union_nospace(head, ptr);
+}
+
+/**
+ * ccs_print_condition - Print condition part.
+ *
+ * @head: Pointer to "struct ccs_io_buffer".
+ * @cond: Pointer to "struct ccs_condition".
+ *
+ * Returns true on success, false otherwise.
+ */
+static bool ccs_print_condition(struct ccs_io_buffer *head,
+				const struct ccs_condition *cond)
+{
+	switch (head->r.cond_step) {
+	case 0:
+		head->r.cond_index = 0;
+		head->r.cond_step++;
+		if (cond->transit && cond->exec_transit) {
+			ccs_set_space(head);
+			ccs_set_string(head, cond->transit->name);
+		}
+		/* fall through */
+	case 1:
+		{
+			const u16 condc = cond->condc;
+			const struct ccs_condition_element *condp =
+				(typeof(condp)) (cond + 1);
+			const struct ccs_number_union *numbers_p =
+				(typeof(numbers_p)) (condp + condc);
+			const struct ccs_name_union *names_p =
+				(typeof(names_p))
+				(numbers_p + cond->numbers_count);
+			const struct ccs_argv *argv =
+				(typeof(argv)) (names_p + cond->names_count);
+			const struct ccs_envp *envp =
+				(typeof(envp)) (argv + cond->argc);
+			u16 skip;
+			for (skip = 0; skip < head->r.cond_index; skip++) {
+				const u8 left = condp->left;
+				const u8 right = condp->right;
+				condp++;
+				switch (left) {
+				case CCS_ARGV_ENTRY:
+					argv++;
+					continue;
+				case CCS_ENVP_ENTRY:
+					envp++;
+					continue;
+				case CCS_NUMBER_UNION:
+					numbers_p++;
+					break;
+				}
+				switch (right) {
+				case CCS_NAME_UNION:
+					names_p++;
+					break;
+				case CCS_NUMBER_UNION:
+					numbers_p++;
+					break;
+				}
+			}
+			while (head->r.cond_index < condc) {
+				const u8 match = condp->equals;
+				const u8 left = condp->left;
+				const u8 right = condp->right;
+				if (!ccs_flush(head))
+					return false;
+				condp++;
+				head->r.cond_index++;
+				ccs_set_space(head);
+				switch (left) {
+				case CCS_ARGV_ENTRY:
+					ccs_io_printf(head,
+						      "exec.argv[%lu]%s=\"",
+						      argv->index,
+						      argv->is_not ? "!" : "");
+					ccs_set_string(head,
+						       argv->value->name);
+					ccs_set_string(head, "\"");
+					argv++;
+					continue;
+				case CCS_ENVP_ENTRY:
+					ccs_set_string(head, "exec.envp[\"");
+					ccs_set_string(head, envp->name->name);
+					ccs_io_printf(head, "\"]%s=",
+						      envp->is_not ? "!" : "");
+					if (envp->value) {
+						ccs_set_string(head, "\"");
+						ccs_set_string(head, envp->
+							       value->name);
+						ccs_set_string(head, "\"");
+					} else {
+						ccs_set_string(head, "NULL");
+					}
+					envp++;
+					continue;
+				case CCS_NUMBER_UNION:
+					ccs_print_number_union_nospace
+						(head, numbers_p++);
+					break;
+				default:
+					ccs_set_string(head,
+					       ccs_condition_keyword[left]);
+					break;
+				}
+				ccs_set_string(head, match ? "=" : "!=");
+				switch (right) {
+				case CCS_NAME_UNION:
+					ccs_print_name_union_quoted
+						(head, names_p++);
+					break;
+				case CCS_NUMBER_UNION:
+					ccs_print_number_union_nospace
+						(head, numbers_p++);
+					break;
+				default:
+					ccs_set_string(head,
+					       ccs_condition_keyword[right]);
+					break;
+				}
+			}
+		}
+		head->r.cond_step++;
+		/* fall through */
+	case 2:
+		if (!ccs_flush(head))
+			break;
+		head->r.cond_step++;
+		/* fall through */
+	case 3:
+		if (cond->grant_log != CCS_GRANTLOG_AUTO)
+			ccs_io_printf(head, " grant_log=%s",
+				      ccs_yesno(cond->grant_log ==
+						CCS_GRANTLOG_YES));
+		if (cond->transit && !cond->exec_transit) {
+			const char *name = cond->transit->name;
+			ccs_set_string(head, " auto_domain_transition=\"");
+			ccs_set_string(head, name);
+			ccs_set_string(head, "\"");
+		}
+		ccs_set_lf(head);
+		return true;
+	}
+	return false;
+}
+
+/**
+ * ccs_set_group - Print "acl_group " header keyword and category name.
+ *
+ * @head:     Pointer to "struct ccs_io_buffer".
+ * @category: Category name.
+ *
+ * Returns nothing.
+ */
+static void ccs_set_group(struct ccs_io_buffer *head, const char *category)
+{
+	if (head->type == CCS_EXCEPTION_POLICY) {
+		ccs_print_namespace(head);
+		ccs_io_printf(head, "acl_group %u ", head->r.acl_group_index);
+	}
+	ccs_set_string(head, category);
+}
+
+/**
+ * ccs_print_entry - Print an ACL entry.
+ *
+ * @head: Pointer to "struct ccs_io_buffer".
+ * @acl:  Pointer to an ACL entry.
+ *
+ * Returns true on success, false otherwise.
+ */
+static bool ccs_print_entry(struct ccs_io_buffer *head,
+			    const struct ccs_acl_info *acl)
+{
+	const u8 acl_type = acl->type;
+	const bool may_trigger_transition = acl->cond && acl->cond->transit;
+	bool first = true;
+	u8 bit;
+	if (head->r.print_cond_part)
+		goto print_cond_part;
+	if (acl->is_deleted)
+		return true;
+	if (!ccs_flush(head))
+		return false;
+	else if (acl_type == CCS_TYPE_PATH_ACL) {
+		struct ccs_path_acl *ptr
+			= container_of(acl, typeof(*ptr), head);
+		for (bit = 0; bit < CCS_MAX_PATH_OPERATION; bit++) {
+			if (!(acl->perm & (1 << bit)))
+				continue;
+			if (head->r.print_transition_related_only &&
+			    bit != CCS_TYPE_EXECUTE && !may_trigger_transition)
+				continue;
+			if (first) {
+				ccs_set_group(head, "file ");
+				first = false;
+			} else {
+				ccs_set_slash(head);
+			}
+			ccs_set_string(head, ccs_path_keyword[bit]);
+		}
+		if (first)
+			return true;
+		ccs_print_name_union(head, &ptr->name);
+#ifdef CONFIG_CCSECURITY_TASK_EXECUTE_HANDLER
+	} else if (acl_type == CCS_TYPE_AUTO_EXECUTE_HANDLER ||
+		   acl_type == CCS_TYPE_DENIED_EXECUTE_HANDLER) {
+		struct ccs_handler_acl *ptr
+			= container_of(acl, typeof(*ptr), head);
+		ccs_set_group(head, "task ");
+		ccs_set_string(head, acl_type == CCS_TYPE_AUTO_EXECUTE_HANDLER
+			       ? "auto_execute_handler " :
+			       "denied_execute_handler ");
+		ccs_set_string(head, ptr->handler->name);
+#endif
+#ifdef CONFIG_CCSECURITY_TASK_DOMAIN_TRANSITION
+	} else if (acl_type == CCS_TYPE_AUTO_TASK_ACL ||
+		   acl_type == CCS_TYPE_MANUAL_TASK_ACL) {
+		struct ccs_task_acl *ptr =
+			container_of(acl, typeof(*ptr), head);
+		ccs_set_group(head, "task ");
+		ccs_set_string(head, acl_type == CCS_TYPE_AUTO_TASK_ACL ?
+			       "auto_domain_transition " :
+			       "manual_domain_transition ");
+		ccs_set_string(head, ptr->domainname->name);
+#endif
+	} else if (head->r.print_transition_related_only &&
+		   !may_trigger_transition) {
+		return true;
+	} else if (acl_type == CCS_TYPE_MKDEV_ACL) {
+		struct ccs_mkdev_acl *ptr =
+			container_of(acl, typeof(*ptr), head);
+		for (bit = 0; bit < CCS_MAX_MKDEV_OPERATION; bit++) {
+			if (!(acl->perm & (1 << bit)))
+				continue;
+			if (first) {
+				ccs_set_group(head, "file ");
+				first = false;
+			} else {
+				ccs_set_slash(head);
+			}
+			ccs_set_string(head, ccs_mac_keywords
+				       [ccs_pnnn2mac[bit]]);
+		}
+		if (first)
+			return true;
+		ccs_print_name_union(head, &ptr->name);
+		ccs_print_number_union(head, &ptr->mode);
+		ccs_print_number_union(head, &ptr->major);
+		ccs_print_number_union(head, &ptr->minor);
+	} else if (acl_type == CCS_TYPE_PATH2_ACL) {
+		struct ccs_path2_acl *ptr =
+			container_of(acl, typeof(*ptr), head);
+		for (bit = 0; bit < CCS_MAX_PATH2_OPERATION; bit++) {
+			if (!(acl->perm & (1 << bit)))
+				continue;
+			if (first) {
+				ccs_set_group(head, "file ");
+				first = false;
+			} else {
+				ccs_set_slash(head);
+			}
+			ccs_set_string(head, ccs_mac_keywords
+				       [ccs_pp2mac[bit]]);
+		}
+		if (first)
+			return true;
+		ccs_print_name_union(head, &ptr->name1);
+		ccs_print_name_union(head, &ptr->name2);
+	} else if (acl_type == CCS_TYPE_PATH_NUMBER_ACL) {
+		struct ccs_path_number_acl *ptr =
+			container_of(acl, typeof(*ptr), head);
+		for (bit = 0; bit < CCS_MAX_PATH_NUMBER_OPERATION; bit++) {
+			if (!(acl->perm & (1 << bit)))
+				continue;
+			if (first) {
+				ccs_set_group(head, "file ");
+				first = false;
+			} else {
+				ccs_set_slash(head);
+			}
+			ccs_set_string(head, ccs_mac_keywords
+				       [ccs_pn2mac[bit]]);
+		}
+		if (first)
+			return true;
+		ccs_print_name_union(head, &ptr->name);
+		ccs_print_number_union(head, &ptr->number);
+#ifdef CONFIG_CCSECURITY_MISC
+	} else if (acl_type == CCS_TYPE_ENV_ACL) {
+		struct ccs_env_acl *ptr =
+			container_of(acl, typeof(*ptr), head);
+		ccs_set_group(head, "misc env ");
+		ccs_set_string(head, ptr->env->name);
+#endif
+#ifdef CONFIG_CCSECURITY_CAPABILITY
+	} else if (acl_type == CCS_TYPE_CAPABILITY_ACL) {
+		struct ccs_capability_acl *ptr =
+			container_of(acl, typeof(*ptr), head);
+		ccs_set_group(head, "capability ");
+		ccs_set_string(head, ccs_mac_keywords
+			       [ccs_c2mac[ptr->operation]]);
+#endif
+#ifdef CONFIG_CCSECURITY_NETWORK
+	} else if (acl_type == CCS_TYPE_INET_ACL) {
+		struct ccs_inet_acl *ptr =
+			container_of(acl, typeof(*ptr), head);
+		for (bit = 0; bit < CCS_MAX_NETWORK_OPERATION; bit++) {
+			if (!(acl->perm & (1 << bit)))
+				continue;
+			if (first) {
+				ccs_set_group(head, "network inet ");
+				ccs_set_string(head, ccs_proto_keyword
+					       [ptr->protocol]);
+				ccs_set_space(head);
+				first = false;
+			} else {
+				ccs_set_slash(head);
+			}
+			ccs_set_string(head, ccs_socket_keyword[bit]);
+		}
+		if (first)
+			return true;
+		ccs_set_space(head);
+		if (!ccs_print_group(head, ptr->address.group)) {
+			char buf[128];
+			ccs_print_ip(buf, sizeof(buf), &ptr->address);
+			ccs_io_printf(head, "%s", buf);
+		}
+		ccs_print_number_union(head, &ptr->port);
+	} else if (acl_type == CCS_TYPE_UNIX_ACL) {
+		struct ccs_unix_acl *ptr =
+			container_of(acl, typeof(*ptr), head);
+		for (bit = 0; bit < CCS_MAX_NETWORK_OPERATION; bit++) {
+			if (!(acl->perm & (1 << bit)))
+				continue;
+			if (first) {
+				ccs_set_group(head, "network unix ");
+				ccs_set_string(head, ccs_proto_keyword
+					       [ptr->protocol]);
+				ccs_set_space(head);
+				first = false;
+			} else {
+				ccs_set_slash(head);
+			}
+			ccs_set_string(head, ccs_socket_keyword[bit]);
+		}
+		if (first)
+			return true;
+		ccs_print_name_union(head, &ptr->name);
+#endif
+#ifdef CONFIG_CCSECURITY_IPC
+	} else if (acl_type == CCS_TYPE_SIGNAL_ACL) {
+		struct ccs_signal_acl *ptr =
+			container_of(acl, typeof(*ptr), head);
+		ccs_set_group(head, "ipc signal ");
+		ccs_print_number_union_nospace(head, &ptr->sig);
+		ccs_set_space(head);
+		ccs_set_string(head, ptr->domainname->name);
+#endif
+	} else if (acl_type == CCS_TYPE_MOUNT_ACL) {
+		struct ccs_mount_acl *ptr =
+			container_of(acl, typeof(*ptr), head);
+		ccs_set_group(head, "file mount");
+		ccs_print_name_union(head, &ptr->dev_name);
+		ccs_print_name_union(head, &ptr->dir_name);
+		ccs_print_name_union(head, &ptr->fs_type);
+		ccs_print_number_union(head, &ptr->flags);
+	}
+	if (acl->cond) {
+		head->r.print_cond_part = true;
+		head->r.cond_step = 0;
+		if (!ccs_flush(head))
+			return false;
+print_cond_part:
+		if (!ccs_print_condition(head, acl->cond))
+			return false;
+		head->r.print_cond_part = false;
+	} else {
+		ccs_set_lf(head);
+	}
+	return true;
+}
+
+/**
+ * ccs_read_acl - Read "struct ccs_acl_info" list.
+ *
+ * @head: Pointer to "struct ccs_io_buffer".
+ * @list: Pointer to "struct list_head".
+ *
+ * Returns true on success, false otherwise.
+ *
+ * Caller holds ccs_read_lock().
+ */
+static bool ccs_read_acl(struct ccs_io_buffer *head, struct list_head *list)
+{
+	list_for_each_cookie(head->r.acl, list) {
+		struct ccs_acl_info *ptr =
+			list_entry(head->r.acl, typeof(*ptr), list);
+		if (!ccs_print_entry(head, ptr))
+			return false;
+	}
+	head->r.acl = NULL;
+	return true;
+}
+
+/**
+ * ccs_read_domain - Read domain policy.
+ *
+ * @head: Pointer to "struct ccs_io_buffer".
+ *
+ * Returns nothing.
+ *
+ * Caller holds ccs_read_lock().
+ */
+static void ccs_read_domain(struct ccs_io_buffer *head)
+{
+	if (head->r.eof)
+		return;
+	list_for_each_cookie(head->r.domain, &ccs_domain_list) {
+		struct ccs_domain_info *domain =
+			list_entry(head->r.domain, typeof(*domain), list);
+		switch (head->r.step) {
+			u8 i;
+		case 0:
+			if (domain->is_deleted &&
+			    !head->r.print_this_domain_only)
+				continue;
+			/* Print domainname and flags. */
+			ccs_set_string(head, domain->domainname->name);
+			ccs_set_lf(head);
+			ccs_io_printf(head, "use_profile %u\n",
+				      domain->profile);
+			for (i = 0; i < CCS_MAX_DOMAIN_INFO_FLAGS; i++)
+				if (domain->flags[i])
+					ccs_set_string(head, ccs_dif[i]);
+			head->r.index = 0;
+			head->r.step++;
+			/* fall through */
+		case 1:
+			while (head->r.index < CCS_MAX_ACL_GROUPS) {
+				i = head->r.index++;
+				if (!test_bit(i, domain->group))
+					continue;
+				ccs_io_printf(head, "use_group %u\n", i);
+				if (!ccs_flush(head))
+					return;
+			}
+			head->r.index = 0;
+			head->r.step++;
+			ccs_set_lf(head);
+			/* fall through */
+		case 2:
+			if (!ccs_read_acl(head, &domain->acl_info_list))
+				return;
+			head->r.step++;
+			if (!ccs_set_lf(head))
+				return;
+			/* fall through */
+		case 3:
+			head->r.step = 0;
+			if (head->r.print_this_domain_only)
+				goto done;
+		}
+	}
+done:
+	head->r.eof = true;
+}
+
+/**
+ * ccs_write_pid - Specify PID to obtain domainname.
+ *
+ * @head: Pointer to "struct ccs_io_buffer".
+ *
+ * Returns 0.
+ */
+static int ccs_write_pid(struct ccs_io_buffer *head)
+{
+	head->r.eof = false;
+	return 0;
+}
+
+/**
+ * ccs_read_pid - Read information of a process.
+ *
+ * @head: Pointer to "struct ccs_io_buffer".
+ *
+ * Returns the domainname which the specified PID is in or
+ * process information of the specified PID on success,
+ * empty string otherwise.
+ *
+ * Caller holds ccs_read_lock().
+ */
+static void ccs_read_pid(struct ccs_io_buffer *head)
+{
+	char *buf = head->write_buf;
+	bool task_info = false;
+	bool global_pid = false;
+	unsigned int pid;
+	struct task_struct *p;
+	struct ccs_domain_info *domain = NULL;
+	u32 ccs_flags = 0;
+	/* Accessing write_buf is safe because head->io_sem is held. */
+	if (!buf) {
+		head->r.eof = true;
+		return; /* Do nothing if open(O_RDONLY). */
+	}
+	if (head->r.w_pos || head->r.eof)
+		return;
+	head->r.eof = true;
+	if (ccs_str_starts(&buf, "info "))
+		task_info = true;
+	if (ccs_str_starts(&buf, "global-pid "))
+		global_pid = true;
+	pid = (unsigned int) simple_strtoul(buf, NULL, 10);
+	ccs_tasklist_lock();
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 24)
+	if (global_pid)
+		p = ccsecurity_exports.find_task_by_pid_ns(pid, &init_pid_ns);
+	else
+		p = ccsecurity_exports.find_task_by_vpid(pid);
+#else
+	p = find_task_by_pid(pid);
+#endif
+	if (p) {
+		domain = ccs_task_domain(p);
+		ccs_flags = ccs_task_flags(p);
+	}
+	ccs_tasklist_unlock();
+	if (!domain)
+		return;
+	if (!task_info) {
+		ccs_io_printf(head, "%u %u ", pid, domain->profile);
+		ccs_set_string(head, domain->domainname->name);
+	} else {
+		ccs_io_printf(head, "%u manager=%s execute_handler=%s ", pid,
+			      ccs_yesno(ccs_flags &
+					CCS_TASK_IS_MANAGER),
+			      ccs_yesno(ccs_flags &
+					CCS_TASK_IS_EXECUTE_HANDLER));
+	}
+}
+
+/**
+ * ccs_write_group - Write "struct ccs_path_group"/"struct ccs_number_group"/"struct ccs_address_group" list.
+ *
+ * @param: Pointer to "struct ccs_acl_param".
+ * @type:  Type of this group.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int ccs_write_group(struct ccs_acl_param *param, const u8 type)
+{
+	struct ccs_group *group = ccs_get_group(param, type);
+	int error = -EINVAL;
+	if (!group)
+		return -ENOMEM;
+	param->list = &group->member_list;
+	if (type == CCS_PATH_GROUP) {
+		struct ccs_path_group *e = &param->e.path_group;
+		e->member_name = ccs_get_name(ccs_read_token(param));
+		if (!e->member_name) {
+			error = -ENOMEM;
+			goto out;
+		}
+		error = ccs_update_policy(sizeof(*e), param);
+		ccs_put_name(e->member_name);
+	} else if (type == CCS_NUMBER_GROUP) {
+		struct ccs_number_group *e = &param->e.number_group;
+		if (param->data[0] == '@' ||
+		    !ccs_parse_number_union(param, &e->number))
+			goto out;
+		error = ccs_update_policy(sizeof(*e), param);
+#ifdef CONFIG_CCSECURITY_NETWORK
+	} else {
+		struct ccs_address_group *e = &param->e.address_group;
+		if (param->data[0] == '@' ||
+		    !ccs_parse_ipaddr_union(param, &e->address))
+			goto out;
+		error = ccs_update_policy(sizeof(*e), param);
+#endif
+	}
+out:
+	ccs_put_group(group);
+	return error;
+}
+
+#ifdef CONFIG_CCSECURITY_PORTRESERVE
+/**
+ * ccs_lport_reserved - Check whether local port is reserved or not.
+ *
+ * @port: Port number.
+ *
+ * Returns true if local port is reserved, false otherwise.
+ */
+static bool __ccs_lport_reserved(const u16 port)
+{
+	return ccs_reserved_port_map[port >> 3] & (1 << (port & 7))
+		? true : false;
+}
+
+/**
+ * ccs_write_reserved_port - Update "struct ccs_reserved" list.
+ *
+ * @param: Pointer to "struct ccs_acl_param".
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds ccs_read_lock().
+ */
+static int ccs_write_reserved_port(struct ccs_acl_param *param)
+{
+	struct ccs_reserved *e = &param->e.reserved;
+	struct ccs_policy_namespace *ns = param->ns;
+	int error;
+	u8 *tmp;
+	if (param->data[0] == '@' ||
+	    !ccs_parse_number_union(param, &e->port) ||
+	    e->port.values[1] > 65535 || param->data[0])
+		return -EINVAL;
+	param->list = &ns->policy_list[CCS_ID_RESERVEDPORT];
+	error = ccs_update_policy(sizeof(*e), param);
+	if (error)
+		return error;
+	tmp = kzalloc(sizeof(ccs_reserved_port_map), CCS_GFP_FLAGS);
+	if (!tmp)
+		return -ENOMEM;
+	list_for_each_entry_srcu(ns, &ccs_namespace_list, namespace_list,
+				 &ccs_ss) {
+		struct ccs_reserved *ptr;
+		struct list_head *list = &ns->policy_list[CCS_ID_RESERVEDPORT];
+		list_for_each_entry_srcu(ptr, list, head.list, &ccs_ss) {
+			unsigned int port;
+			if (ptr->head.is_deleted)
+				continue;
+			for (port = ptr->port.values[0];
+			     port <= ptr->port.values[1]; port++)
+				tmp[port >> 3] |= 1 << (port & 7);
+		}
+	}
+	memmove(ccs_reserved_port_map, tmp, sizeof(ccs_reserved_port_map));
+	kfree(tmp);
+	/*
+	 * Since this feature is no-op by default, we don't need to register
+	 * this callback hook unless the first entry is added.
+	 */
+	ccsecurity_ops.lport_reserved = __ccs_lport_reserved;
+	return 0;
+}
+#endif
+
+/**
+ * ccs_write_aggregator - Write "struct ccs_aggregator" list.
+ *
+ * @param: Pointer to "struct ccs_acl_param".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int ccs_write_aggregator(struct ccs_acl_param *param)
+{
+	struct ccs_aggregator *e = &param->e.aggregator;
+	int error = param->is_delete ? -ENOENT : -ENOMEM;
+	const char *original_name = ccs_read_token(param);
+	const char *aggregated_name = ccs_read_token(param);
+	if (!ccs_correct_word(original_name) ||
+	    !ccs_correct_path(aggregated_name))
+		return -EINVAL;
+	e->original_name = ccs_get_name(original_name);
+	e->aggregated_name = ccs_get_name(aggregated_name);
+	if (!e->original_name || !e->aggregated_name ||
+	    e->aggregated_name->is_patterned) /* No patterns allowed. */
+		goto out;
+	param->list = &param->ns->policy_list[CCS_ID_AGGREGATOR];
+	error = ccs_update_policy(sizeof(*e), param);
+out:
+	ccs_put_name(e->original_name);
+	ccs_put_name(e->aggregated_name);
+	return error;
+}
+
+/**
+ * ccs_write_transition_control - Write "struct ccs_transition_control" list.
+ *
+ * @param: Pointer to "struct ccs_acl_param".
+ * @type:  Type of this entry.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int ccs_write_transition_control(struct ccs_acl_param *param,
+					const u8 type)
+{
+	struct ccs_transition_control *e = &param->e.transition_control;
+	int error = param->is_delete ? -ENOENT : -ENOMEM;
+	char *program = param->data;
+	char *domainname = strstr(program, " from ");
+	e->type = type;
+	if (domainname) {
+		*domainname = '\0';
+		domainname += 6;
+	} else if (type == CCS_TRANSITION_CONTROL_NO_KEEP ||
+		   type == CCS_TRANSITION_CONTROL_KEEP) {
+		domainname = program;
+		program = NULL;
+	}
+	if (program && strcmp(program, "any")) {
+		if (!ccs_correct_path(program))
+			return -EINVAL;
+		e->program = ccs_get_name(program);
+		if (!e->program)
+			goto out;
+	}
+	if (domainname && strcmp(domainname, "any")) {
+		if (!ccs_correct_domain(domainname)) {
+			if (!ccs_correct_path(domainname))
+				goto out;
+			e->is_last_name = true;
+		}
+		e->domainname = ccs_get_name(domainname);
+		if (!e->domainname)
+			goto out;
+	}
+	param->list = &param->ns->policy_list[CCS_ID_TRANSITION_CONTROL];
+	error = ccs_update_policy(sizeof(*e), param);
+out:
+	ccs_put_name(e->domainname);
+	ccs_put_name(e->program);
+	return error;
+}
+
+/**
+ * ccs_write_exception - Write exception policy.
+ *
+ * @head: Pointer to "struct ccs_io_buffer".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int ccs_write_exception(struct ccs_io_buffer *head)
+{
+	const bool is_delete = head->w.is_delete;
+	struct ccs_acl_param param = {
+		.ns = head->w.ns,
+		.is_delete = is_delete,
+		.data = head->write_buf,
+	};
+	u8 i;
+	/* Forced zero clear for using memcmp() at ccs_update_policy(). */
+	memset(&param.e, 0, sizeof(param.e));
+	if (ccs_str_starts(&param.data, "aggregator "))
+		return ccs_write_aggregator(&param);
+#ifdef CONFIG_CCSECURITY_PORTRESERVE
+	if (ccs_str_starts(&param.data, "deny_autobind "))
+		return ccs_write_reserved_port(&param);
+#endif
+	for (i = 0; i < CCS_MAX_TRANSITION_TYPE; i++)
+		if (ccs_str_starts(&param.data, ccs_transition_type[i]))
+			return ccs_write_transition_control(&param, i);
+	for (i = 0; i < CCS_MAX_GROUP; i++)
+		if (ccs_str_starts(&param.data, ccs_group_name[i]))
+			return ccs_write_group(&param, i);
+	if (ccs_str_starts(&param.data, "acl_group ")) {
+		unsigned int group;
+		char *data;
+		group = simple_strtoul(param.data, &data, 10);
+		if (group < CCS_MAX_ACL_GROUPS && *data++ == ' ')
+			return ccs_write_acl(head->w.ns,
+					     &head->w.ns->acl_group[group],
+					     data, is_delete);
+	}
+	return -EINVAL;
+}
+
+/**
+ * ccs_read_group - Read "struct ccs_path_group"/"struct ccs_number_group"/"struct ccs_address_group" list.
+ *
+ * @head: Pointer to "struct ccs_io_buffer".
+ * @idx:  Index number.
+ *
+ * Returns true on success, false otherwise.
+ *
+ * Caller holds ccs_read_lock().
+ */
+static bool ccs_read_group(struct ccs_io_buffer *head, const int idx)
+{
+	struct ccs_policy_namespace *ns = container_of(head->r.ns, typeof(*ns),
+						       namespace_list);
+	struct list_head *list = &ns->group_list[idx];
+	list_for_each_cookie(head->r.group, list) {
+		struct ccs_group *group =
+			list_entry(head->r.group, typeof(*group), head.list);
+		list_for_each_cookie(head->r.acl, &group->member_list) {
+			struct ccs_acl_head *ptr =
+				list_entry(head->r.acl, typeof(*ptr), list);
+			if (ptr->is_deleted)
+				continue;
+			if (!ccs_flush(head))
+				return false;
+			ccs_print_namespace(head);
+			ccs_set_string(head, ccs_group_name[idx]);
+			ccs_set_string(head, group->group_name->name);
+			if (idx == CCS_PATH_GROUP) {
+				ccs_set_space(head);
+				ccs_set_string(head, container_of
+					       (ptr, struct ccs_path_group,
+						head)->member_name->name);
+			} else if (idx == CCS_NUMBER_GROUP) {
+				ccs_print_number_union(head, &container_of
+					       (ptr, struct ccs_number_group,
+						head)->number);
+#ifdef CONFIG_CCSECURITY_NETWORK
+			} else if (idx == CCS_ADDRESS_GROUP) {
+				char buffer[128];
+				struct ccs_address_group *member =
+					container_of(ptr, typeof(*member),
+						     head);
+				ccs_print_ip(buffer, sizeof(buffer),
+					     &member->address);
+				ccs_io_printf(head, " %s", buffer);
+#endif
+			}
+			ccs_set_lf(head);
+		}
+		head->r.acl = NULL;
+	}
+	head->r.group = NULL;
+	return true;
+}
+
+/**
+ * ccs_read_policy - Read "struct ccs_..._entry" list.
+ *
+ * @head: Pointer to "struct ccs_io_buffer".
+ * @idx:  Index number.
+ *
+ * Returns true on success, false otherwise.
+ *
+ * Caller holds ccs_read_lock().
+ */
+static bool ccs_read_policy(struct ccs_io_buffer *head, const int idx)
+{
+	struct ccs_policy_namespace *ns = container_of(head->r.ns, typeof(*ns),
+						       namespace_list);
+	struct list_head *list = &ns->policy_list[idx];
+	list_for_each_cookie(head->r.acl, list) {
+		struct ccs_acl_head *acl =
+			container_of(head->r.acl, typeof(*acl), list);
+		if (acl->is_deleted)
+			continue;
+		if (head->r.print_transition_related_only &&
+		    idx != CCS_ID_TRANSITION_CONTROL)
+			continue;
+		if (!ccs_flush(head))
+			return false;
+		switch (idx) {
+		case CCS_ID_TRANSITION_CONTROL:
+			{
+				struct ccs_transition_control *ptr =
+					container_of(acl, typeof(*ptr), head);
+				ccs_print_namespace(head);
+				ccs_set_string(head,
+					       ccs_transition_type[ptr->type]);
+				ccs_set_string(head, ptr->program ?
+					       ptr->program->name : "any");
+				ccs_set_string(head, " from ");
+				ccs_set_string(head, ptr->domainname ?
+					       ptr->domainname->name : "any");
+			}
+			break;
+		case CCS_ID_AGGREGATOR:
+			{
+				struct ccs_aggregator *ptr =
+					container_of(acl, typeof(*ptr), head);
+				ccs_print_namespace(head);
+				ccs_set_string(head, "aggregator ");
+				ccs_set_string(head, ptr->original_name->name);
+				ccs_set_space(head);
+				ccs_set_string(head,
+					       ptr->aggregated_name->name);
+			}
+			break;
+#ifdef CONFIG_CCSECURITY_PORTRESERVE
+		case CCS_ID_RESERVEDPORT:
+			{
+				struct ccs_reserved *ptr =
+					container_of(acl, typeof(*ptr), head);
+				ccs_print_namespace(head);
+				ccs_set_string(head, "deny_autobind ");
+				ccs_print_number_union_nospace(head,
+							       &ptr->port);
+			}
+			break;
+#endif
+		default:
+			continue;
+		}
+		ccs_set_lf(head);
+	}
+	head->r.acl = NULL;
+	return true;
+}
+
+/**
+ * ccs_read_exception - Read exception policy.
+ *
+ * @head: Pointer to "struct ccs_io_buffer".
+ *
+ * Returns nothing.
+ *
+ * Caller holds ccs_read_lock().
+ */
+static void ccs_read_exception(struct ccs_io_buffer *head)
+{
+	struct ccs_policy_namespace *ns = container_of(head->r.ns, typeof(*ns),
+						       namespace_list);
+	if (head->r.eof)
+		return;
+	while (head->r.step < CCS_MAX_POLICY &&
+	       ccs_read_policy(head, head->r.step))
+		head->r.step++;
+	if (head->r.step < CCS_MAX_POLICY)
+		return;
+	while (head->r.step < CCS_MAX_POLICY + CCS_MAX_GROUP &&
+	       ccs_read_group(head, head->r.step - CCS_MAX_POLICY))
+		head->r.step++;
+	if (head->r.step < CCS_MAX_POLICY + CCS_MAX_GROUP)
+		return;
+	while (head->r.step < CCS_MAX_POLICY + CCS_MAX_GROUP
+	       + CCS_MAX_ACL_GROUPS) {
+		head->r.acl_group_index =
+			head->r.step - CCS_MAX_POLICY - CCS_MAX_GROUP;
+		if (!ccs_read_acl(head, &ns->acl_group
+				  [head->r.acl_group_index]))
+			return;
+		head->r.step++;
+	}
+	head->r.eof = true;
+}
+
+/**
+ * ccs_truncate - Truncate a line.
+ *
+ * @str: String to truncate.
+ *
+ * Returns length of truncated @str.
+ */
+static int ccs_truncate(char *str)
+{
+	char *start = str;
+	while (*(unsigned char *) str > (unsigned char) ' ')
+		str++;
+	*str = '\0';
+	return strlen(start) + 1;
+}
+
+/**
+ * ccs_add_entry - Add an ACL to current thread's domain. Used by learning mode.
+ *
+ * @header: Lines containing ACL.
+ *
+ * Returns nothing.
+ */
+static void ccs_add_entry(char *header)
+{
+	char *buffer;
+	char *realpath = NULL;
+	char *argv0 = NULL;
+	char *symlink = NULL;
+#ifdef CONFIG_CCSECURITY_TASK_EXECUTE_HANDLER
+	char *handler;
+#endif
+	char *cp = strchr(header, '\n');
+	int len;
+	if (!cp)
+		return;
+	cp = strchr(cp + 1, '\n');
+	if (!cp)
+		return;
+	*cp++ = '\0';
+	len = strlen(cp) + 1;
+	/* strstr() will return NULL if ordering is wrong. */
+	if (*cp == 'f') {
+		argv0 = strstr(header, " argv[]={ \"");
+		if (argv0) {
+			argv0 += 10;
+			len += ccs_truncate(argv0) + 14;
+		}
+		realpath = strstr(header, " exec={ realpath=\"");
+		if (realpath) {
+			realpath += 8;
+			len += ccs_truncate(realpath) + 6;
+		}
+		symlink = strstr(header, " symlink.target=\"");
+		if (symlink)
+			len += ccs_truncate(symlink + 1) + 1;
+	}
+#ifdef CONFIG_CCSECURITY_TASK_EXECUTE_HANDLER
+	handler = strstr(header, "type=execute_handler");
+	if (handler)
+		len += ccs_truncate(handler) + 6;
+#endif
+	buffer = kmalloc(len, CCS_GFP_FLAGS);
+	if (!buffer)
+		return;
+	snprintf(buffer, len - 1, "%s", cp);
+#ifdef CONFIG_CCSECURITY_TASK_EXECUTE_HANDLER
+	if (handler)
+		ccs_addprintf(buffer, len, " task.%s", handler);
+#endif
+	if (realpath)
+		ccs_addprintf(buffer, len, " exec.%s", realpath);
+	if (argv0)
+		ccs_addprintf(buffer, len, " exec.argv[0]=%s", argv0);
+	if (symlink)
+		ccs_addprintf(buffer, len, "%s", symlink);
+	ccs_normalize_line(buffer);
+	{
+		struct ccs_domain_info *domain = ccs_current_domain();
+		if (!ccs_write_acl(domain->ns, &domain->acl_info_list,
+				   buffer, false))
+			ccs_update_stat(CCS_STAT_POLICY_UPDATES);
+	}
+	kfree(buffer);
+}
+
+/**
+ * ccs_domain_quota_ok - Check for domain's quota.
+ *
+ * @r: Pointer to "struct ccs_request_info".
+ *
+ * Returns true if the domain is not exceeded quota, false otherwise.
+ *
+ * Caller holds ccs_read_lock().
+ */
+static bool ccs_domain_quota_ok(struct ccs_request_info *r)
+{
+	unsigned int count = 0;
+	struct ccs_domain_info * const domain = ccs_current_domain();
+	struct ccs_acl_info *ptr;
+	if (r->mode != CCS_CONFIG_LEARNING)
+		return false;
+	if (!domain)
+		return true;
+	list_for_each_entry_srcu(ptr, &domain->acl_info_list, list, &ccs_ss) {
+		u16 perm;
+		u8 i;
+		if (ptr->is_deleted)
+			continue;
+		switch (ptr->type) {
+		case CCS_TYPE_PATH_ACL:
+		case CCS_TYPE_PATH2_ACL:
+		case CCS_TYPE_PATH_NUMBER_ACL:
+		case CCS_TYPE_MKDEV_ACL:
+#ifdef CONFIG_CCSECURITY_NETWORK
+		case CCS_TYPE_INET_ACL:
+		case CCS_TYPE_UNIX_ACL:
+#endif
+			perm = ptr->perm;
+			break;
+#ifdef CONFIG_CCSECURITY_TASK_EXECUTE_HANDLER
+		case CCS_TYPE_AUTO_EXECUTE_HANDLER:
+		case CCS_TYPE_DENIED_EXECUTE_HANDLER:
+#endif
+#ifdef CONFIG_CCSECURITY_TASK_DOMAIN_TRANSITION
+		case CCS_TYPE_AUTO_TASK_ACL:
+		case CCS_TYPE_MANUAL_TASK_ACL:
+#endif
+			perm = 0;
+			break;
+		default:
+			perm = 1;
+		}
+		for (i = 0; i < 16; i++)
+			if (perm & (1 << i))
+				count++;
+	}
+	if (count < ccs_profile(r->profile)->pref[CCS_PREF_MAX_LEARNING_ENTRY])
+		return true;
+	if (!domain->flags[CCS_DIF_QUOTA_WARNED]) {
+		domain->flags[CCS_DIF_QUOTA_WARNED] = true;
+		/* r->granted = false; */
+		ccs_write_log(r, "%s", ccs_dif[CCS_DIF_QUOTA_WARNED]);
+		printk(KERN_WARNING "WARNING: "
+		       "Domain '%s' has too many ACLs to hold. "
+		       "Stopped learning mode.\n", domain->domainname->name);
+	}
+	return false;
+}
+
+/**
+ * ccs_supervisor - Ask for the supervisor's decision.
+ *
+ * @r:   Pointer to "struct ccs_request_info".
+ * @fmt: The printf()'s format string, followed by parameters.
+ *
+ * Returns 0 if the supervisor decided to permit the access request which
+ * violated the policy in enforcing mode, CCS_RETRY_REQUEST if the supervisor
+ * decided to retry the access request which violated the policy in enforcing
+ * mode, 0 if it is not in enforcing mode, -EPERM otherwise.
+ */
+static int ccs_supervisor(struct ccs_request_info *r, const char *fmt, ...)
+{
+	va_list args;
+	int error;
+	int len;
+	static unsigned int ccs_serial;
+	struct ccs_query entry = { };
+	bool quota_exceeded = false;
+	va_start(args, fmt);
+	len = vsnprintf((char *) &len, 1, fmt, args) + 1;
+	va_end(args);
+	/* Write /proc/ccs/audit. */
+	va_start(args, fmt);
+	ccs_write_log2(r, len, fmt, args);
+	va_end(args);
+	/* Nothing more to do if granted. */
+	if (r->granted)
+		return 0;
+	if (r->mode)
+		ccs_update_stat(r->mode);
+	switch (r->mode) {
+		int i;
+		struct ccs_profile *p;
+	case CCS_CONFIG_ENFORCING:
+		error = -EPERM;
+		if (atomic_read(&ccs_query_observers))
+			break;
+		if (r->dont_sleep_on_enforce_error)
+			goto out;
+		p = ccs_profile(r->profile);
+		/* Check enforcing_penalty parameter. */
+		for (i = 0; i < p->pref[CCS_PREF_ENFORCING_PENALTY]; i++) {
+			set_current_state(TASK_INTERRUPTIBLE);
+			schedule_timeout(HZ / 10);
+		}
+		goto out;
+	case CCS_CONFIG_LEARNING:
+		error = 0;
+		/* Check max_learning_entry parameter. */
+		if (ccs_domain_quota_ok(r))
+			break;
+		/* fall through */
+	default:
+		return 0;
+	}
+	/* Get message. */
+	va_start(args, fmt);
+	entry.query = ccs_init_log(r, len, fmt, args);
+	va_end(args);
+	if (!entry.query)
+		goto out;
+	entry.query_len = strlen(entry.query) + 1;
+	if (!error) {
+		ccs_add_entry(entry.query);
+		goto out;
+	}
+	len = ccs_round2(entry.query_len);
+	entry.domain = ccs_current_domain();
+	spin_lock(&ccs_query_list_lock);
+	if (ccs_memory_quota[CCS_MEMORY_QUERY] &&
+	    ccs_memory_used[CCS_MEMORY_QUERY] + len
+	    >= ccs_memory_quota[CCS_MEMORY_QUERY]) {
+		quota_exceeded = true;
+	} else {
+		entry.serial = ccs_serial++;
+		entry.retry = r->retry;
+		ccs_memory_used[CCS_MEMORY_QUERY] += len;
+		list_add_tail(&entry.list, &ccs_query_list);
+	}
+	spin_unlock(&ccs_query_list_lock);
+	if (quota_exceeded)
+		goto out;
+	/* Give 10 seconds for supervisor's opinion. */
+	while (entry.timer < 10) {
+		wake_up_all(&ccs_query_wait);
+		if (wait_event_interruptible_timeout
+		    (ccs_answer_wait, entry.answer ||
+		     !atomic_read(&ccs_query_observers), HZ))
+			break;
+		else
+			entry.timer++;
+	}
+	spin_lock(&ccs_query_list_lock);
+	list_del(&entry.list);
+	ccs_memory_used[CCS_MEMORY_QUERY] -= len;
+	spin_unlock(&ccs_query_list_lock);
+	switch (entry.answer) {
+	case 3: /* Asked to retry by administrator. */
+		error = CCS_RETRY_REQUEST;
+		r->retry++;
+		break;
+	case 1:
+		/* Granted by administrator. */
+		error = 0;
+		break;
+	default:
+		/* Timed out or rejected by administrator. */
+		break;
+	}
+out:
+	kfree(entry.query);
+	return error;
+}
+
+/**
+ * ccs_audit_log - Audit permission check log.
+ *
+ * @r: Pointer to "struct ccs_request_info".
+ *
+ * Returns return value of ccs_supervisor().
+ */
+int ccs_audit_log(struct ccs_request_info *r)
+{
+	switch (r->param_type) {
+		u8 type;
+		char buf[48];
+#ifdef CONFIG_CCSECURITY_NETWORK
+		const u32 *address;
+#endif
+	case CCS_TYPE_PATH_ACL:
+		return ccs_supervisor(r, "file %s %s\n", ccs_path_keyword
+				      [r->param.path.operation],
+				      r->param.path.filename->name);
+	case CCS_TYPE_PATH2_ACL:
+		return ccs_supervisor(r, "file %s %s %s\n", ccs_mac_keywords
+				      [ccs_pp2mac[r->param.path2.operation]],
+				      r->param.path2.filename1->name,
+				      r->param.path2.filename2->name);
+	case CCS_TYPE_PATH_NUMBER_ACL:
+		type = r->param.path_number.operation;
+		switch (type) {
+		case CCS_TYPE_CREATE:
+		case CCS_TYPE_MKDIR:
+		case CCS_TYPE_MKFIFO:
+		case CCS_TYPE_MKSOCK:
+		case CCS_TYPE_CHMOD:
+			snprintf(buf, sizeof(buf), "0%lo",
+				 r->param.path_number.number);
+			break;
+		case CCS_TYPE_IOCTL:
+			snprintf(buf, sizeof(buf), "0x%lX",
+				 r->param.path_number.number);
+			break;
+		default:
+			snprintf(buf, sizeof(buf), "%lu",
+				 r->param.path_number.number);
+			break;
+		}
+		return ccs_supervisor(r, "file %s %s %s\n", ccs_mac_keywords
+				      [ccs_pn2mac[type]],
+				      r->param.path_number.filename->name,
+				      buf);
+	case CCS_TYPE_MKDEV_ACL:
+		return ccs_supervisor(r, "file %s %s 0%o %u %u\n",
+				      ccs_mac_keywords
+				      [ccs_pnnn2mac[r->param.mkdev.operation]],
+				      r->param.mkdev.filename->name,
+				      r->param.mkdev.mode,
+				      r->param.mkdev.major,
+				      r->param.mkdev.minor);
+	case CCS_TYPE_MOUNT_ACL:
+		return ccs_supervisor(r, "file mount %s %s %s 0x%lX\n",
+				      r->param.mount.dev->name,
+				      r->param.mount.dir->name,
+				      r->param.mount.type->name,
+				      r->param.mount.flags);
+#ifdef CONFIG_CCSECURITY_MISC
+	case CCS_TYPE_ENV_ACL:
+		return ccs_supervisor(r, "misc env %s\n",
+				      r->param.environ.name->name);
+#endif
+#ifdef CONFIG_CCSECURITY_CAPABILITY
+	case CCS_TYPE_CAPABILITY_ACL:
+		return ccs_supervisor(r, "capability %s\n", ccs_mac_keywords
+				      [ccs_c2mac[r->param.capability.
+						 operation]]);
+#endif
+#ifdef CONFIG_CCSECURITY_NETWORK
+	case CCS_TYPE_INET_ACL:
+		address = r->param.inet_network.address;
+		if (r->param.inet_network.is_ipv6)
+			ccs_print_ipv6(buf, sizeof(buf),
+				       (const struct in6_addr *) address);
+		else
+			ccs_print_ipv4(buf, sizeof(buf), address);
+		return ccs_supervisor(r, "network inet %s %s %s %u\n",
+				      ccs_proto_keyword[r->param.inet_network.
+							protocol],
+				      ccs_socket_keyword[r->param.inet_network.
+							 operation],
+				      buf, r->param.inet_network.port);
+	case CCS_TYPE_UNIX_ACL:
+		return ccs_supervisor(r, "network unix %s %s %s\n",
+				      ccs_proto_keyword[r->param.
+							unix_network.protocol],
+				      ccs_socket_keyword[r->param.unix_network.
+							 operation],
+				      r->param.unix_network.address->name);
+#endif
+#ifdef CONFIG_CCSECURITY_IPC
+	case CCS_TYPE_SIGNAL_ACL:
+		return ccs_supervisor(r, "ipc signal %d %s\n",
+				      r->param.signal.sig,
+				      r->param.signal.dest_pattern);
+#endif
+	}
+	return 0;
+}
+
+/**
+ * ccs_find_domain_by_qid - Get domain by query id.
+ *
+ * @serial: Query ID assigned by ccs_supervisor().
+ *
+ * Returns pointer to "struct ccs_domain_info" if found, NULL otherwise.
+ */
+static struct ccs_domain_info *ccs_find_domain_by_qid(unsigned int serial)
+{
+	struct ccs_query *ptr;
+	struct ccs_domain_info *domain = NULL;
+	spin_lock(&ccs_query_list_lock);
+	list_for_each_entry(ptr, &ccs_query_list, list) {
+		if (ptr->serial != serial)
+			continue;
+		domain = ptr->domain;
+		break;
+	}
+	spin_unlock(&ccs_query_list_lock);
+	return domain;
+}
+
+/**
+ * ccs_read_query - Read access requests which violated policy in enforcing mode.
+ *
+ * @head: Pointer to "struct ccs_io_buffer".
+ *
+ * Returns nothing.
+ */
+static void ccs_read_query(struct ccs_io_buffer *head)
+{
+	struct list_head *tmp;
+	unsigned int pos = 0;
+	size_t len = 0;
+	char *buf;
+	if (head->r.w_pos)
+		return;
+	kfree(head->read_buf);
+	head->read_buf = NULL;
+	spin_lock(&ccs_query_list_lock);
+	list_for_each(tmp, &ccs_query_list) {
+		struct ccs_query *ptr = list_entry(tmp, typeof(*ptr), list);
+		if (pos++ != head->r.query_index)
+			continue;
+		len = ptr->query_len;
+		break;
+	}
+	spin_unlock(&ccs_query_list_lock);
+	if (!len) {
+		head->r.query_index = 0;
+		return;
+	}
+	buf = kzalloc(len + 32, CCS_GFP_FLAGS);
+	if (!buf)
+		return;
+	pos = 0;
+	spin_lock(&ccs_query_list_lock);
+	list_for_each(tmp, &ccs_query_list) {
+		struct ccs_query *ptr = list_entry(tmp, typeof(*ptr), list);
+		if (pos++ != head->r.query_index)
+			continue;
+		/*
+		 * Some query can be skipped because ccs_query_list
+		 * can change, but I don't care.
+		 */
+		if (len == ptr->query_len)
+			snprintf(buf, len + 31, "Q%u-%hu\n%s", ptr->serial,
+				 ptr->retry, ptr->query);
+		break;
+	}
+	spin_unlock(&ccs_query_list_lock);
+	if (buf[0]) {
+		head->read_buf = buf;
+		head->r.w[head->r.w_pos++] = buf;
+		head->r.query_index++;
+	} else {
+		kfree(buf);
+	}
+}
+
+/**
+ * ccs_write_answer - Write the supervisor's decision.
+ *
+ * @head: Pointer to "struct ccs_io_buffer".
+ *
+ * Returns 0 on success, -EINVAL otherwise.
+ */
+static int ccs_write_answer(struct ccs_io_buffer *head)
+{
+	char *data = head->write_buf;
+	struct list_head *tmp;
+	unsigned int serial;
+	unsigned int answer;
+	spin_lock(&ccs_query_list_lock);
+	list_for_each(tmp, &ccs_query_list) {
+		struct ccs_query *ptr = list_entry(tmp, typeof(*ptr), list);
+		ptr->timer = 0;
+	}
+	spin_unlock(&ccs_query_list_lock);
+	if (sscanf(data, "A%u=%u", &serial, &answer) != 2)
+		return -EINVAL;
+	spin_lock(&ccs_query_list_lock);
+	list_for_each(tmp, &ccs_query_list) {
+		struct ccs_query *ptr = list_entry(tmp, typeof(*ptr), list);
+		if (ptr->serial != serial)
+			continue;
+		ptr->answer = (u8) answer;
+		/* Remove from ccs_query_list. */
+		if (ptr->answer) {
+			list_del(&ptr->list);
+			INIT_LIST_HEAD(&ptr->list);
+		}
+		break;
+	}
+	spin_unlock(&ccs_query_list_lock);
+	wake_up_all(&ccs_answer_wait);
+	return 0;
+}
+
+/**
+ * ccs_read_version - Get version.
+ *
+ * @head: Pointer to "struct ccs_io_buffer".
+ *
+ * Returns nothing.
+ */
+static void ccs_read_version(struct ccs_io_buffer *head)
+{
+	if (head->r.eof)
+		return;
+	ccs_set_string(head, "1.8.4");
+	head->r.eof = true;
+}
+
+/**
+ * ccs_update_stat - Update statistic counters.
+ *
+ * @index: Index for policy type.
+ *
+ * Returns nothing.
+ */
+static void ccs_update_stat(const u8 index)
+{
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 0)
+	struct timeval tv;
+	do_gettimeofday(&tv);
+	/*
+	 * I don't use atomic operations because race condition is not fatal.
+	 */
+	ccs_stat_updated[index]++;
+	ccs_stat_modified[index] = tv.tv_sec;
+#else
+	/*
+	 * I don't use atomic operations because race condition is not fatal.
+	 */
+	ccs_stat_updated[index]++;
+	ccs_stat_modified[index] = get_seconds();
+#endif
+}
+
+/**
+ * ccs_read_stat - Read statistic data.
+ *
+ * @head: Pointer to "struct ccs_io_buffer".
+ *
+ * Returns nothing.
+ */
+static void ccs_read_stat(struct ccs_io_buffer *head)
+{
+	u8 i;
+	unsigned int total = 0;
+	if (head->r.eof)
+		return;
+	for (i = 0; i < CCS_MAX_POLICY_STAT; i++) {
+		ccs_io_printf(head, "Policy %-30s %10u", ccs_policy_headers[i],
+			      ccs_stat_updated[i]);
+		if (ccs_stat_modified[i]) {
+			struct ccs_time stamp;
+			ccs_convert_time(ccs_stat_modified[i], &stamp);
+			ccs_io_printf(head, " (Last: %04u/%02u/%02u "
+				      "%02u:%02u:%02u)",
+				      stamp.year, stamp.month, stamp.day,
+				      stamp.hour, stamp.min, stamp.sec);
+		}
+		ccs_set_lf(head);
+	}
+	for (i = 0; i < CCS_MAX_MEMORY_STAT; i++) {
+		unsigned int used = ccs_memory_used[i];
+		total += used;
+		ccs_io_printf(head, "Memory used by %-22s %10u",
+			      ccs_memory_headers[i], used);
+		used = ccs_memory_quota[i];
+		if (used)
+			ccs_io_printf(head, " (Quota: %10u)", used);
+		ccs_set_lf(head);
+	}
+	ccs_io_printf(head, "Total memory used:                    %10u\n",
+		      total);
+	head->r.eof = true;
+}
+
+/**
+ * ccs_write_stat - Set memory quota.
+ *
+ * @head: Pointer to "struct ccs_io_buffer".
+ *
+ * Returns 0.
+ */
+static int ccs_write_stat(struct ccs_io_buffer *head)
+{
+	char *data = head->write_buf;
+	u8 i;
+	if (ccs_str_starts(&data, "Memory used by "))
+		for (i = 0; i < CCS_MAX_MEMORY_STAT; i++)
+			if (ccs_str_starts(&data, ccs_memory_headers[i])) {
+				if (*data == ' ')
+					data++;
+				ccs_memory_quota[i] =
+					simple_strtoul(data, NULL, 10);
+			}
+	return 0;
+}
+
+/**
+ * ccs_print_bprm - Print "struct linux_binprm" for auditing.
+ *
+ * @bprm: Pointer to "struct linux_binprm".
+ * @dump: Pointer to "struct ccs_page_dump".
+ *
+ * Returns the contents of @bprm on success, NULL otherwise.
+ *
+ * This function uses kzalloc(), so caller must kfree() if this function
+ * didn't return NULL.
+ */
+static char *ccs_print_bprm(struct linux_binprm *bprm,
+			    struct ccs_page_dump *dump)
+{
+	static const int ccs_buffer_len = 4096 * 2;
+	char *buffer = kzalloc(ccs_buffer_len, CCS_GFP_FLAGS);
+	char *cp;
+	char *last_start;
+	int len;
+	unsigned long pos = bprm->p;
+	int offset = pos % PAGE_SIZE;
+	int argv_count = bprm->argc;
+	int envp_count = bprm->envc;
+	bool truncated = false;
+	if (!buffer)
+		return NULL;
+	len = snprintf(buffer, ccs_buffer_len - 1, "argv[]={ ");
+	cp = buffer + len;
+	if (!argv_count) {
+		memmove(cp, "} envp[]={ ", 11);
+		cp += 11;
+	}
+	last_start = cp;
+	while (argv_count || envp_count) {
+		if (!ccs_dump_page(bprm, pos, dump))
+			goto out;
+		pos += PAGE_SIZE - offset;
+		/* Read. */
+		while (offset < PAGE_SIZE) {
+			const char *kaddr = dump->data;
+			const unsigned char c = kaddr[offset++];
+			if (cp == last_start)
+				*cp++ = '"';
+			if (cp >= buffer + ccs_buffer_len - 32) {
+				/* Reserve some room for "..." string. */
+				truncated = true;
+			} else if (c == '\\') {
+				*cp++ = '\\';
+				*cp++ = '\\';
+			} else if (c > ' ' && c < 127) {
+				*cp++ = c;
+			} else if (!c) {
+				*cp++ = '"';
+				*cp++ = ' ';
+				last_start = cp;
+			} else {
+				*cp++ = '\\';
+				*cp++ = (c >> 6) + '0';
+				*cp++ = ((c >> 3) & 7) + '0';
+				*cp++ = (c & 7) + '0';
+			}
+			if (c)
+				continue;
+			if (argv_count) {
+				if (--argv_count == 0) {
+					if (truncated) {
+						cp = last_start;
+						memmove(cp, "... ", 4);
+						cp += 4;
+					}
+					memmove(cp, "} envp[]={ ", 11);
+					cp += 11;
+					last_start = cp;
+					truncated = false;
+				}
+			} else if (envp_count) {
+				if (--envp_count == 0) {
+					if (truncated) {
+						cp = last_start;
+						memmove(cp, "... ", 4);
+						cp += 4;
+					}
+				}
+			}
+			if (!argv_count && !envp_count)
+				break;
+		}
+		offset = 0;
+	}
+	*cp++ = '}';
+	*cp = '\0';
+	return buffer;
+out:
+	snprintf(buffer, ccs_buffer_len - 1, "argv[]={ ... } envp[]= { ... }");
+	return buffer;
+}
+
+/**
+ * ccs_filetype - Get string representation of file type.
+ *
+ * @mode: Mode value for stat().
+ *
+ * Returns file type string.
+ */
+static inline const char *ccs_filetype(const umode_t mode)
+{
+	switch (mode & S_IFMT) {
+	case S_IFREG:
+	case 0:
+		return ccs_condition_keyword[CCS_TYPE_IS_FILE];
+	case S_IFDIR:
+		return ccs_condition_keyword[CCS_TYPE_IS_DIRECTORY];
+	case S_IFLNK:
+		return ccs_condition_keyword[CCS_TYPE_IS_SYMLINK];
+	case S_IFIFO:
+		return ccs_condition_keyword[CCS_TYPE_IS_FIFO];
+	case S_IFSOCK:
+		return ccs_condition_keyword[CCS_TYPE_IS_SOCKET];
+	case S_IFBLK:
+		return ccs_condition_keyword[CCS_TYPE_IS_BLOCK_DEV];
+	case S_IFCHR:
+		return ccs_condition_keyword[CCS_TYPE_IS_CHAR_DEV];
+	}
+	return "unknown"; /* This should not happen. */
+}
+
+/**
+ * ccs_print_header - Get header line of audit log.
+ *
+ * @r: Pointer to "struct ccs_request_info".
+ *
+ * Returns string representation.
+ *
+ * This function uses kmalloc(), so caller must kfree() if this function
+ * didn't return NULL.
+ */
+static char *ccs_print_header(struct ccs_request_info *r)
+{
+	struct ccs_time stamp;
+	struct ccs_obj_info *obj = r->obj;
+	const u32 ccs_flags = ccs_current_flags();
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 24)
+	const pid_t gpid = ccs_sys_getpid();
+#else
+	const pid_t gpid = task_pid_nr(current);
+#endif
+	static const int ccs_buffer_len = 4096;
+	char *buffer = kmalloc(ccs_buffer_len, CCS_GFP_FLAGS);
+	int pos;
+	u8 i;
+	if (!buffer)
+		return NULL;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 0)
+	{
+		struct timeval tv;
+		do_gettimeofday(&tv);
+		ccs_convert_time(tv.tv_sec, &stamp);
+	}
+#else
+	ccs_convert_time(get_seconds(), &stamp);
+#endif
+	pos = snprintf(buffer, ccs_buffer_len - 1,
+		       "#%04u/%02u/%02u %02u:%02u:%02u# profile=%u mode=%s "
+		       "granted=%s (global-pid=%u) task={ pid=%u ppid=%u "
+		       "uid=%u gid=%u euid=%u egid=%u suid=%u sgid=%u "
+		       "fsuid=%u fsgid=%u type%s=execute_handler }",
+		       stamp.year, stamp.month, stamp.day, stamp.hour,
+		       stamp.min, stamp.sec, r->profile, ccs_mode[r->mode],
+		       ccs_yesno(r->granted), gpid, ccs_sys_getpid(),
+		       ccs_sys_getppid(),
+		       from_kuid(&init_user_ns, current_uid()),
+		       from_kgid(&init_user_ns, current_gid()),
+		       from_kuid(&init_user_ns, current_euid()),
+		       from_kgid(&init_user_ns, current_egid()),
+		       from_kuid(&init_user_ns, current_suid()),
+		       from_kgid(&init_user_ns, current_sgid()),
+		       from_kuid(&init_user_ns, current_fsuid()),
+		       from_kgid(&init_user_ns, current_fsgid()),
+		       ccs_flags & CCS_TASK_IS_EXECUTE_HANDLER ? "" : "!");
+	if (!obj)
+		goto no_obj_info;
+	if (!obj->validate_done) {
+		ccs_get_attributes(obj);
+		obj->validate_done = true;
+	}
+	for (i = 0; i < CCS_MAX_PATH_STAT; i++) {
+		struct ccs_mini_stat *stat;
+		unsigned int dev;
+		umode_t mode;
+		if (!obj->stat_valid[i])
+			continue;
+		stat = &obj->stat[i];
+		dev = stat->dev;
+		mode = stat->mode;
+		if (i & 1) {
+			pos += snprintf(buffer + pos, ccs_buffer_len - 1 - pos,
+					" path%u.parent={ uid=%u gid=%u "
+					"ino=%lu perm=0%o }", (i >> 1) + 1,
+					from_kuid(&init_user_ns, stat->uid),
+					from_kgid(&init_user_ns, stat->gid),
+					(unsigned long) stat->ino,
+					stat->mode & S_IALLUGO);
+			continue;
+		}
+		pos += snprintf(buffer + pos, ccs_buffer_len - 1 - pos,
+				" path%u={ uid=%u gid=%u ino=%lu major=%u"
+				" minor=%u perm=0%o type=%s", (i >> 1) + 1,
+				from_kuid(&init_user_ns, stat->uid),
+				from_kgid(&init_user_ns, stat->gid),
+				(unsigned long) stat->ino, MAJOR(dev),
+				MINOR(dev), mode & S_IALLUGO,
+				ccs_filetype(mode));
+		if (S_ISCHR(mode) || S_ISBLK(mode)) {
+			dev = stat->rdev;
+			pos += snprintf(buffer + pos, ccs_buffer_len - 1 - pos,
+					" dev_major=%u dev_minor=%u",
+					MAJOR(dev), MINOR(dev));
+		}
+		pos += snprintf(buffer + pos, ccs_buffer_len - 1 - pos, " }");
+	}
+no_obj_info:
+	if (pos < ccs_buffer_len - 1)
+		return buffer;
+	kfree(buffer);
+	return NULL;
+}
+
+/**
+ * ccs_init_log - Allocate buffer for audit logs.
+ *
+ * @r:    Pointer to "struct ccs_request_info".
+ * @len:  Buffer size needed for @fmt and @args.
+ * @fmt:  The printf()'s format string.
+ * @args: va_list structure for @fmt.
+ *
+ * Returns pointer to allocated memory.
+ *
+ * This function uses kzalloc(), so caller must kfree() if this function
+ * didn't return NULL.
+ */
+static char *ccs_init_log(struct ccs_request_info *r, int len, const char *fmt,
+			  va_list args)
+{
+	char *buf = NULL;
+	char *bprm_info = NULL;
+	char *realpath = NULL;
+	const char *symlink = NULL;
+	const char *header = NULL;
+	int pos;
+	const char *domainname = ccs_current_domain()->domainname->name;
+	header = ccs_print_header(r);
+	if (!header)
+		return NULL;
+	/* +10 is for '\n' etc. and '\0'. */
+	len += strlen(domainname) + strlen(header) + 10;
+	if (r->ee) {
+		struct file *file = r->ee->bprm->file;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 20)
+		struct path path = { file->f_vfsmnt, file->f_dentry };
+		realpath = ccs_realpath(&path);
+#else
+		realpath = ccs_realpath(&file->f_path);
+#endif
+		bprm_info = ccs_print_bprm(r->ee->bprm, &r->ee->dump);
+		if (!realpath || !bprm_info)
+			goto out;
+		/* +80 is for " exec={ realpath=\"%s\" argc=%d envc=%d %s }" */
+		len += strlen(realpath) + 80 + strlen(bprm_info);
+	} else if (r->obj && r->obj->symlink_target) {
+		symlink = r->obj->symlink_target->name;
+		/* +18 is for " symlink.target=\"%s\"" */
+		len += 18 + strlen(symlink);
+	}
+	len = ccs_round2(len);
+	buf = kzalloc(len, CCS_GFP_FLAGS);
+	if (!buf)
+		goto out;
+	len--;
+	pos = snprintf(buf, len, "%s", header);
+	if (realpath) {
+		struct linux_binprm *bprm = r->ee->bprm;
+		pos += snprintf(buf + pos, len - pos,
+				" exec={ realpath=\"%s\" argc=%d envc=%d %s }",
+				realpath, bprm->argc, bprm->envc, bprm_info);
+	} else if (symlink)
+		pos += snprintf(buf + pos, len - pos, " symlink.target=\"%s\"",
+				symlink);
+	pos += snprintf(buf + pos, len - pos, "\n%s\n", domainname);
+	vsnprintf(buf + pos, len - pos, fmt, args);
+out:
+	kfree(realpath);
+	kfree(bprm_info);
+	kfree(header);
+	return buf;
+}
+
+/**
+ * ccs_transition_failed - Print waning message and send signal when domain transition failed.
+ *
+ * @domainname: Name of domain to transit.
+ *
+ * Returns nothing.
+ *
+ * Note that if current->pid == 1, sending SIGKILL won't work.
+ */
+void ccs_transition_failed(const char *domainname)
+{
+	printk(KERN_WARNING
+	       "ERROR: Unable to transit to '%s' domain.\n", domainname);
+	force_sig(SIGKILL, current);
+}
+
+/**
+ * ccs_update_task_domain - Update task's domain.
+ *
+ * @r: Pointer to "struct ccs_request_info".
+ *
+ * Returns nothing.
+ *
+ * The task will retry as hard as possible. But if domain transition failed,
+ * the task will be killed by SIGKILL.
+ */
+static void ccs_update_task_domain(struct ccs_request_info *r)
+{
+	char *buf;
+	const char *cp;
+	const struct ccs_acl_info *acl = r->matched_acl;
+	r->matched_acl = NULL;
+	if (!acl || !acl->cond || !acl->cond->transit ||
+	    acl->cond->exec_transit)
+		return;
+	while (1) {
+		buf = kzalloc(CCS_EXEC_TMPSIZE, CCS_GFP_FLAGS);
+		if (buf)
+			break;
+		ssleep(1);
+		if (fatal_signal_pending(current))
+			return;
+	}
+	cp = acl->cond->transit->name;
+	if (*cp == '/')
+		snprintf(buf, CCS_EXEC_TMPSIZE - 1, "%s %s",
+			 ccs_current_domain()->domainname->name, cp);
+	else
+		strncpy(buf, cp, CCS_EXEC_TMPSIZE - 1);
+	if (!ccs_assign_domain(buf, true))
+		ccs_transition_failed(buf);
+	kfree(buf);
+}
+
+/**
+ * ccs_get_audit - Get audit mode.
+ *
+ * @r: Pointer to "struct ccs_request_info".
+ *
+ * Returns true if this request should be audited, false otherwise.
+ */
+static bool ccs_get_audit(const struct ccs_request_info *r)
+{
+	const struct ccs_acl_info *matched_acl = r->matched_acl;
+	const u8 profile = r->profile;
+	const u8 index = r->type;
+	const bool is_granted = r->granted;
+	u8 mode;
+	struct ccs_profile *p;
+	if (!ccs_policy_loaded)
+		return false;
+	p = ccs_profile(profile);
+	if (ccs_log_count >= p->pref[CCS_PREF_MAX_AUDIT_LOG])
+		return false;
+	if (is_granted && matched_acl && matched_acl->cond &&
+	    matched_acl->cond->grant_log != CCS_GRANTLOG_AUTO)
+		return matched_acl->cond->grant_log == CCS_GRANTLOG_YES;
+	mode = p->config[index];
+	if (mode == CCS_CONFIG_USE_DEFAULT)
+		mode = p->config
+			[ccs_index2category[index] + CCS_MAX_MAC_INDEX];
+	if (mode == CCS_CONFIG_USE_DEFAULT)
+		mode = p->default_config;
+	if (is_granted)
+		return mode & CCS_CONFIG_WANT_GRANT_LOG;
+	return mode & CCS_CONFIG_WANT_REJECT_LOG;
+}
+
+/**
+ * ccs_write_log2 - Write an audit log.
+ *
+ * @r:    Pointer to "struct ccs_request_info".
+ * @len:  Buffer size needed for @fmt and @args.
+ * @fmt:  The printf()'s format string.
+ * @args: va_list structure for @fmt.
+ *
+ * Returns nothing.
+ */
+static void ccs_write_log2(struct ccs_request_info *r, int len,
+			   const char *fmt, va_list args)
+{
+	char *buf;
+	struct ccs_log *entry;
+	bool quota_exceeded = false;
+	if (!ccs_get_audit(r))
+		goto out;
+	buf = ccs_init_log(r, len, fmt, args);
+	if (!buf)
+		goto out;
+	entry = kzalloc(sizeof(*entry), CCS_GFP_FLAGS);
+	if (!entry) {
+		kfree(buf);
+		goto out;
+	}
+	entry->log = buf;
+	len = ccs_round2(strlen(buf) + 1);
+	/*
+	 * The entry->size is used for memory quota checks.
+	 * Don't go beyond strlen(entry->log).
+	 */
+	entry->size = len + ccs_round2(sizeof(*entry));
+	spin_lock(&ccs_log_lock);
+	if (ccs_memory_quota[CCS_MEMORY_AUDIT] &&
+	    ccs_memory_used[CCS_MEMORY_AUDIT] + entry->size >=
+	    ccs_memory_quota[CCS_MEMORY_AUDIT]) {
+		quota_exceeded = true;
+	} else {
+		ccs_memory_used[CCS_MEMORY_AUDIT] += entry->size;
+		list_add_tail(&entry->list, &ccs_log);
+		ccs_log_count++;
+	}
+	spin_unlock(&ccs_log_lock);
+	if (quota_exceeded) {
+		kfree(buf);
+		kfree(entry);
+		goto out;
+	}
+	wake_up(&ccs_log_wait);
+out:
+	ccs_update_task_domain(r);
+}
+
+/**
+ * ccs_write_log - Write an audit log.
+ *
+ * @r:   Pointer to "struct ccs_request_info".
+ * @fmt: The printf()'s format string, followed by parameters.
+ *
+ * Returns nothing.
+ */
+void ccs_write_log(struct ccs_request_info *r, const char *fmt, ...)
+{
+	va_list args;
+	int len;
+	va_start(args, fmt);
+	len = vsnprintf((char *) &len, 1, fmt, args) + 1;
+	va_end(args);
+	va_start(args, fmt);
+	ccs_write_log2(r, len, fmt, args);
+	va_end(args);
+}
+
+/**
+ * ccs_read_log - Read an audit log.
+ *
+ * @head: Pointer to "struct ccs_io_buffer".
+ *
+ * Returns nothing.
+ */
+static void ccs_read_log(struct ccs_io_buffer *head)
+{
+	struct ccs_log *ptr = NULL;
+	if (head->r.w_pos)
+		return;
+	kfree(head->read_buf);
+	head->read_buf = NULL;
+	spin_lock(&ccs_log_lock);
+	if (!list_empty(&ccs_log)) {
+		ptr = list_entry(ccs_log.next, typeof(*ptr), list);
+		list_del(&ptr->list);
+		ccs_log_count--;
+		ccs_memory_used[CCS_MEMORY_AUDIT] -= ptr->size;
+	}
+	spin_unlock(&ccs_log_lock);
+	if (ptr) {
+		head->read_buf = ptr->log;
+		head->r.w[head->r.w_pos++] = head->read_buf;
+		kfree(ptr);
+	}
+}
+
+/**
+ * ccs_set_namespace_cursor - Set namespace to read.
+ *
+ * @head: Pointer to "struct ccs_io_buffer".
+ *
+ * Returns nothing.
+ */
+static void ccs_set_namespace_cursor(struct ccs_io_buffer *head)
+{
+	struct list_head *ns;
+	if (head->type != CCS_EXCEPTION_POLICY && head->type != CCS_PROFILE)
+		return;
+	/*
+	 * If this is the first read, or reading previous namespace finished
+	 * and has more namespaces to read, update the namespace cursor.
+	 */
+	ns = head->r.ns;
+	if (!ns || (head->r.eof && ns->next != &ccs_namespace_list)) {
+		/* Clearing is OK because ccs_flush() returned true. */
+		memset(&head->r, 0, sizeof(head->r));
+		head->r.ns = ns ? ns->next : ccs_namespace_list.next;
+	}
+}
+
+/**
+ * ccs_has_more_namespace - Check for unread namespaces.
+ *
+ * @head: Pointer to "struct ccs_io_buffer".
+ *
+ * Returns true if we have more entries to print, false otherwise.
+ */
+static bool ccs_has_more_namespace(struct ccs_io_buffer *head)
+{
+	return (head->type == CCS_EXCEPTION_POLICY ||
+		head->type == CCS_PROFILE) && head->r.eof &&
+		head->r.ns->next != &ccs_namespace_list;
+}
+
+/**
+ * ccs_find_namespace - Find specified namespace.
+ *
+ * @name: Name of namespace to find.
+ * @len:  Length of @name.
+ *
+ * Returns pointer to "struct ccs_policy_namespace" if found, NULL otherwise.
+ *
+ * Caller holds ccs_read_lock().
+ */
+static struct ccs_policy_namespace *ccs_find_namespace(const char *name,
+						       const unsigned int len)
+{
+	struct ccs_policy_namespace *ns;
+	list_for_each_entry_srcu(ns, &ccs_namespace_list, namespace_list,
+				 &ccs_ss) {
+		if (strncmp(name, ns->name, len) ||
+		    (name[len] && name[len] != ' '))
+			continue;
+		return ns;
+	}
+	return NULL;
+}
+
+/**
+ * ccs_assign_namespace - Create a new namespace.
+ *
+ * @domainname: Name of namespace to create.
+ *
+ * Returns pointer to "struct ccs_policy_namespace" on success, NULL otherwise.
+ *
+ * Caller holds ccs_read_lock().
+ */
+static struct ccs_policy_namespace *ccs_assign_namespace
+(const char *domainname)
+{
+	struct ccs_policy_namespace *ptr;
+	struct ccs_policy_namespace *entry;
+	const char *cp = domainname;
+	unsigned int len = 0;
+	while (*cp && *cp++ != ' ')
+		len++;
+	ptr = ccs_find_namespace(domainname, len);
+	if (ptr)
+		return ptr;
+	if (len >= CCS_EXEC_TMPSIZE - 10 || !ccs_domain_def(domainname))
+		return NULL;
+	entry = kzalloc(sizeof(*entry) + len + 1, CCS_GFP_FLAGS);
+	if (!entry)
+		return NULL;
+	if (mutex_lock_interruptible(&ccs_policy_lock))
+		goto out;
+	ptr = ccs_find_namespace(domainname, len);
+	if (!ptr && ccs_memory_ok(entry, sizeof(*entry) + len + 1)) {
+		char *name = (char *) (entry + 1);
+		ptr = entry;
+		memmove(name, domainname, len);
+		name[len] = '\0';
+		entry->name = name;
+		ccs_init_policy_namespace(entry);
+		entry = NULL;
+	}
+	mutex_unlock(&ccs_policy_lock);
+out:
+	kfree(entry);
+	return ptr;
+}
+
+/**
+ * ccs_namespace_jump - Check for namespace jump.
+ *
+ * @domainname: Name of domain.
+ *
+ * Returns true if namespace differs, false otherwise.
+ */
+static bool ccs_namespace_jump(const char *domainname)
+{
+	const char *namespace = ccs_current_namespace()->name;
+	const int len = strlen(namespace);
+	return strncmp(domainname, namespace, len) ||
+		(domainname[len] && domainname[len] != ' ');
+}
+
+/**
+ * ccs_assign_domain - Create a domain or a namespace.
+ *
+ * @domainname: The name of domain.
+ * @transit:    True if transit to domain found or created.
+ *
+ * Returns pointer to "struct ccs_domain_info" on success, NULL otherwise.
+ *
+ * Caller holds ccs_read_lock().
+ */
+struct ccs_domain_info *ccs_assign_domain(const char *domainname,
+					  const bool transit)
+{
+	struct ccs_security *security = ccs_current_security();
+	struct ccs_domain_info e = { };
+	struct ccs_domain_info *entry = ccs_find_domain(domainname);
+	bool created = false;
+	if (entry) {
+		if (transit) {
+			/*
+			 * Since namespace is created at runtime, profiles may
+			 * not be created by the moment the process transits to
+			 * that domain. Do not perform domain transition if
+			 * profile for that domain is not yet created.
+			 */
+			if (ccs_policy_loaded &&
+			    !entry->ns->profile_ptr[entry->profile])
+				return NULL;
+			security->ccs_domain_info = entry;
+		}
+		return entry;
+	}
+	/* Requested domain does not exist. */
+	/* Don't create requested domain if domainname is invalid. */
+	if (strlen(domainname) >= CCS_EXEC_TMPSIZE - 10 ||
+	    !ccs_correct_domain(domainname))
+		return NULL;
+	/*
+	 * Since definition of profiles and acl_groups may differ across
+	 * namespaces, do not inherit "use_profile" and "use_group" settings
+	 * by automatically creating requested domain upon domain transition.
+	 */
+	if (transit && ccs_namespace_jump(domainname))
+		return NULL;
+	e.ns = ccs_assign_namespace(domainname);
+	if (!e.ns)
+		return NULL;
+	/*
+	 * "use_profile" and "use_group" settings for automatically created
+	 * domains are inherited from current domain. These are 0 for manually
+	 * created domains.
+	 */
+	if (transit) {
+		const struct ccs_domain_info *domain =
+			security->ccs_domain_info;
+		e.profile = domain->profile;
+		memcpy(e.group, domain->group, sizeof(e.group));
+	}
+	e.domainname = ccs_get_name(domainname);
+	if (!e.domainname)
+		return NULL;
+	if (mutex_lock_interruptible(&ccs_policy_lock))
+		goto out;
+	entry = ccs_find_domain(domainname);
+	if (!entry) {
+		entry = ccs_commit_ok(&e, sizeof(e));
+		if (entry) {
+			INIT_LIST_HEAD(&entry->acl_info_list);
+			list_add_tail_rcu(&entry->list, &ccs_domain_list);
+			created = true;
+		}
+	}
+	mutex_unlock(&ccs_policy_lock);
+out:
+	ccs_put_name(e.domainname);
+	if (entry && transit) {
+		security->ccs_domain_info = entry;
+		if (created) {
+			struct ccs_request_info r;
+			int i;
+			ccs_init_request_info(&r, CCS_MAC_FILE_EXECUTE);
+			r.granted = false;
+			ccs_write_log(&r, "use_profile %u\n", entry->profile);
+			for (i = 0; i < CCS_MAX_ACL_GROUPS; i++)
+				if (test_bit(i, entry->group))
+					ccs_write_log(&r, "use_group %u\n", i);
+			ccs_update_stat(CCS_STAT_POLICY_UPDATES);
+		}
+	}
+	return entry;
+}
+
+/**
+ * ccs_parse_policy - Parse a policy line.
+ *
+ * @head: Poiter to "struct ccs_io_buffer".
+ * @line: Line to parse.
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds ccs_read_lock().
+ */
+static int ccs_parse_policy(struct ccs_io_buffer *head, char *line)
+{
+	/* Delete request? */
+	head->w.is_delete = !strncmp(line, "delete ", 7);
+	if (head->w.is_delete)
+		memmove(line, line + 7, strlen(line + 7) + 1);
+	/* Selecting namespace to update. */
+	if (head->type == CCS_EXCEPTION_POLICY || head->type == CCS_PROFILE) {
+		if (*line == '<') {
+			char *cp = strchr(line, ' ');
+			if (cp) {
+				*cp++ = '\0';
+				head->w.ns = ccs_assign_namespace(line);
+				memmove(line, cp, strlen(cp) + 1);
+			} else
+				head->w.ns = NULL;
+		} else
+			head->w.ns = &ccs_kernel_namespace;
+		/* Don't allow updating if namespace is invalid. */
+		if (!head->w.ns)
+			return -ENOENT;
+	}
+	/* Do the update. */
+	switch (head->type) {
+	case CCS_DOMAIN_POLICY:
+		return ccs_write_domain(head);
+	case CCS_EXCEPTION_POLICY:
+		return ccs_write_exception(head);
+#ifdef CONFIG_CCSECURITY_TASK_EXECUTE_HANDLER
+	case CCS_EXECUTE_HANDLER:
+#endif
+	case CCS_PROCESS_STATUS:
+		return ccs_write_pid(head);
+	case CCS_STAT:
+		return ccs_write_stat(head);
+	case CCS_PROFILE:
+		return ccs_write_profile(head);
+	case CCS_QUERY:
+		return ccs_write_answer(head);
+	case CCS_MANAGER:
+		return ccs_write_manager(head);
+	default:
+		return -ENOSYS;
+	}
+}
+
+/**
+ * ccs_policy_io_init - Register hooks for policy I/O.
+ *
+ * Returns nothing.
+ */
+static void __init ccs_policy_io_init(void)
+{
+	ccsecurity_ops.check_profile = ccs_check_profile;
+}
+
+/**
+ * ccs_load_builtin_policy - Load built-in policy.
+ *
+ * Returns nothing.
+ */
+static void __init ccs_load_builtin_policy(void)
+{
+	/*
+	 * This include file is manually created and contains built-in policy
+	 * named "ccs_builtin_profile", "ccs_builtin_exception_policy",
+	 * "ccs_builtin_domain_policy", "ccs_builtin_manager",
+	 * "ccs_builtin_stat" in the form of "static char [] __initdata".
+	 */
+#include "builtin-policy.h"
+	u8 i;
+	const int idx = ccs_read_lock();
+	for (i = 0; i < 5; i++) {
+		struct ccs_io_buffer head = { };
+		char *start = "";
+		switch (i) {
+		case 0:
+			start = ccs_builtin_profile;
+			head.type = CCS_PROFILE;
+			break;
+		case 1:
+			start = ccs_builtin_exception_policy;
+			head.type = CCS_EXCEPTION_POLICY;
+			break;
+		case 2:
+			start = ccs_builtin_domain_policy;
+			head.type = CCS_DOMAIN_POLICY;
+			break;
+		case 3:
+			start = ccs_builtin_manager;
+			head.type = CCS_MANAGER;
+			break;
+		case 4:
+			start = ccs_builtin_stat;
+			head.type = CCS_STAT;
+			break;
+		}
+		while (1) {
+			char *end = strchr(start, '\n');
+			if (!end)
+				break;
+			*end = '\0';
+			ccs_normalize_line(start);
+			head.write_buf = start;
+			ccs_parse_policy(&head, start);
+			start = end + 1;
+		}
+	}
+	ccs_read_unlock(idx);
+#ifdef CONFIG_CCSECURITY_OMIT_USERSPACE_LOADER
+	ccs_check_profile();
+#endif
+}
+
+/**
+ * ccs_read_self - read() for /proc/ccs/self_domain interface.
+ *
+ * @file:  Pointer to "struct file".
+ * @buf:   Domainname which current thread belongs to.
+ * @count: Size of @buf.
+ * @ppos:  Bytes read by now.
+ *
+ * Returns read size on success, negative value otherwise.
+ */
+static ssize_t ccs_read_self(struct file *file, char __user *buf, size_t count,
+			     loff_t *ppos)
+{
+	const char *domain = ccs_current_domain()->domainname->name;
+	loff_t len = strlen(domain);
+	loff_t pos = *ppos;
+	if (pos >= len || !count)
+		return 0;
+	len -= pos;
+	if (count < len)
+		len = count;
+	if (copy_to_user(buf, domain + pos, len))
+		return -EFAULT;
+	*ppos += len;
+	return len;
+}
+
+/**
+ * ccs_open - open() for /proc/ccs/ interface.
+ *
+ * @inode: Pointer to "struct inode".
+ * @file:  Pointer to "struct file".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int ccs_open(struct inode *inode, struct file *file)
+{
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 10, 0)
+	const u8 type = (unsigned long) PDE_DATA(inode);
+#else
+	const u8 type = (unsigned long) PDE(inode)->data;
+#endif
+	struct ccs_io_buffer *head = kzalloc(sizeof(*head), CCS_GFP_FLAGS);
+	if (!head)
+		return -ENOMEM;
+	mutex_init(&head->io_sem);
+	head->type = type;
+#ifdef CONFIG_CCSECURITY_TASK_EXECUTE_HANDLER
+	if (type == CCS_EXECUTE_HANDLER) {
+		/* Allow execute_handler to read process's status. */
+		if (!(ccs_current_flags() & CCS_TASK_IS_EXECUTE_HANDLER)) {
+			kfree(head);
+			return -EPERM;
+		}
+	}
+#endif
+	if ((file->f_mode & FMODE_READ) && type != CCS_AUDIT &&
+	    type != CCS_QUERY) {
+		/* Don't allocate read_buf for poll() access. */
+		head->readbuf_size = 4096;
+		head->read_buf = kzalloc(head->readbuf_size, CCS_GFP_FLAGS);
+		if (!head->read_buf) {
+			kfree(head);
+			return -ENOMEM;
+		}
+	}
+	if (file->f_mode & FMODE_WRITE) {
+		head->writebuf_size = 4096;
+		head->write_buf = kzalloc(head->writebuf_size, CCS_GFP_FLAGS);
+		if (!head->write_buf) {
+			kfree(head->read_buf);
+			kfree(head);
+			return -ENOMEM;
+		}
+	}
+	/*
+	 * If the file is /proc/ccs/query, increment the observer counter.
+	 * The obserber counter is used by ccs_supervisor() to see if
+	 * there is some process monitoring /proc/ccs/query.
+	 */
+	if (type == CCS_QUERY)
+		atomic_inc(&ccs_query_observers);
+	file->private_data = head;
+	ccs_notify_gc(head, true);
+	return 0;
+}
+
+/**
+ * ccs_release - close() for /proc/ccs/ interface.
+ *
+ * @inode: Pointer to "struct inode".
+ * @file:  Pointer to "struct file".
+ *
+ * Returns 0.
+ */
+static int ccs_release(struct inode *inode, struct file *file)
+{
+	struct ccs_io_buffer *head = file->private_data;
+	/*
+	 * If the file is /proc/ccs/query, decrement the observer counter.
+	 */
+	if (head->type == CCS_QUERY &&
+	    atomic_dec_and_test(&ccs_query_observers))
+		wake_up_all(&ccs_answer_wait);
+	ccs_notify_gc(head, false);
+	return 0;
+}
+
+/**
+ * ccs_poll - poll() for /proc/ccs/ interface.
+ *
+ * @file: Pointer to "struct file".
+ * @wait: Pointer to "poll_table". Maybe NULL.
+ *
+ * Returns POLLIN | POLLRDNORM | POLLOUT | POLLWRNORM if ready to read/write,
+ * POLLOUT | POLLWRNORM otherwise.
+ */
+static unsigned int ccs_poll(struct file *file, poll_table *wait)
+{
+	struct ccs_io_buffer *head = file->private_data;
+	if (head->type == CCS_AUDIT) {
+		if (!ccs_memory_used[CCS_MEMORY_AUDIT]) {
+			poll_wait(file, &ccs_log_wait, wait);
+			if (!ccs_memory_used[CCS_MEMORY_AUDIT])
+				return POLLOUT | POLLWRNORM;
+		}
+	} else if (head->type == CCS_QUERY) {
+		if (list_empty(&ccs_query_list)) {
+			poll_wait(file, &ccs_query_wait, wait);
+			if (list_empty(&ccs_query_list))
+				return POLLOUT | POLLWRNORM;
+		}
+	}
+	return POLLIN | POLLRDNORM | POLLOUT | POLLWRNORM;
+}
+
+/**
+ * ccs_read - read() for /proc/ccs/ interface.
+ *
+ * @file:  Pointer to "struct file".
+ * @buf:   Pointer to buffer.
+ * @count: Size of @buf.
+ * @ppos:  Unused.
+ *
+ * Returns bytes read on success, negative value otherwise.
+ */
+static ssize_t ccs_read(struct file *file, char __user *buf, size_t count,
+			loff_t *ppos)
+{
+	struct ccs_io_buffer *head = file->private_data;
+	int len;
+	int idx;
+	if (mutex_lock_interruptible(&head->io_sem))
+		return -EINTR;
+	head->read_user_buf = buf;
+	head->read_user_buf_avail = count;
+	idx = ccs_read_lock();
+	if (ccs_flush(head))
+		/* Call the policy handler. */
+		do {
+			ccs_set_namespace_cursor(head);
+			switch (head->type) {
+			case CCS_DOMAIN_POLICY:
+				ccs_read_domain(head);
+				break;
+			case CCS_EXCEPTION_POLICY:
+				ccs_read_exception(head);
+				break;
+			case CCS_AUDIT:
+				ccs_read_log(head);
+				break;
+#ifdef CONFIG_CCSECURITY_TASK_EXECUTE_HANDLER
+			case CCS_EXECUTE_HANDLER:
+#endif
+			case CCS_PROCESS_STATUS:
+				ccs_read_pid(head);
+				break;
+			case CCS_VERSION:
+				ccs_read_version(head);
+				break;
+			case CCS_STAT:
+				ccs_read_stat(head);
+				break;
+			case CCS_PROFILE:
+				ccs_read_profile(head);
+				break;
+			case CCS_QUERY:
+				ccs_read_query(head);
+				break;
+			case CCS_MANAGER:
+				ccs_read_manager(head);
+				break;
+			}
+		} while (ccs_flush(head) && ccs_has_more_namespace(head));
+	ccs_read_unlock(idx);
+	len = head->read_user_buf - buf;
+	mutex_unlock(&head->io_sem);
+	return len;
+}
+
+#ifdef CONFIG_CCSECURITY_TASK_DOMAIN_TRANSITION
+
+/**
+ * ccs_write_self - write() for /proc/ccs/self_domain interface.
+ *
+ * @file:  Pointer to "struct file".
+ * @buf:   Domainname to transit to.
+ * @count: Size of @buf.
+ * @ppos:  Unused.
+ *
+ * Returns @count on success, negative value otherwise.
+ *
+ * If domain transition was permitted but the domain transition failed, this
+ * function returns error rather than terminating current thread with SIGKILL.
+ */
+static ssize_t ccs_write_self(struct file *file, const char __user *buf,
+			      size_t count, loff_t *ppos)
+{
+	char *data;
+	int error;
+	if (!count || count >= CCS_EXEC_TMPSIZE - 10)
+		return -ENOMEM;
+	data = kzalloc(count + 1, CCS_GFP_FLAGS);
+	if (!data)
+		return -ENOMEM;
+	if (copy_from_user(data, buf, count)) {
+		error = -EFAULT;
+		goto out;
+	}
+	ccs_normalize_line(data);
+	if (ccs_correct_domain(data)) {
+		const int idx = ccs_read_lock();
+		struct ccs_path_info name;
+		struct ccs_request_info r;
+		name.name = data;
+		ccs_fill_path_info(&name);
+		/* Check "task manual_domain_transition" permission. */
+		ccs_init_request_info(&r, CCS_MAC_FILE_EXECUTE);
+		r.param_type = CCS_TYPE_MANUAL_TASK_ACL;
+		r.param.task.domainname = &name;
+		ccs_check_acl(&r);
+		if (!r.granted)
+			error = -EPERM;
+		else
+			error = ccs_assign_domain(data, true) ? 0 : -ENOENT;
+		ccs_read_unlock(idx);
+	} else
+		error = -EINVAL;
+out:
+	kfree(data);
+	return error ? error : count;
+}
+
+#endif
+
+/**
+ * ccs_write - write() for /proc/ccs/ interface.
+ *
+ * @file:  Pointer to "struct file".
+ * @buf:   Pointer to buffer.
+ * @count: Size of @buf.
+ * @ppos:  Unused.
+ *
+ * Returns @count on success, negative value otherwise.
+ */
+static ssize_t ccs_write(struct file *file, const char __user *buf,
+			 size_t count, loff_t *ppos)
+{
+	struct ccs_io_buffer *head = file->private_data;
+	int error = count;
+	char *cp0 = head->write_buf;
+	int idx;
+	if (mutex_lock_interruptible(&head->io_sem))
+		return -EINTR;
+	head->read_user_buf_avail = 0;
+	idx = ccs_read_lock();
+	/* Read a line and dispatch it to the policy handler. */
+	while (count) {
+		char c;
+		if (head->w.avail >= head->writebuf_size - 1) {
+			const int len = head->writebuf_size * 2;
+			char *cp = kzalloc(len, CCS_GFP_FLAGS);
+			if (!cp) {
+				error = -ENOMEM;
+				break;
+			}
+			memmove(cp, cp0, head->w.avail);
+			kfree(cp0);
+			head->write_buf = cp;
+			cp0 = cp;
+			head->writebuf_size = len;
+		}
+		if (get_user(c, buf)) {
+			error = -EFAULT;
+			break;
+		}
+		buf++;
+		count--;
+		cp0[head->w.avail++] = c;
+		if (c != '\n')
+			continue;
+		cp0[head->w.avail - 1] = '\0';
+		head->w.avail = 0;
+		ccs_normalize_line(cp0);
+		if (!strcmp(cp0, "reset")) {
+			head->w.ns = &ccs_kernel_namespace;
+			head->w.domain = NULL;
+			memset(&head->r, 0, sizeof(head->r));
+			continue;
+		}
+		/* Don't allow updating policies by non manager programs. */
+		switch (head->type) {
+		case CCS_PROCESS_STATUS:
+			/* This does not write anything. */
+			break;
+		case CCS_DOMAIN_POLICY:
+			if (ccs_select_domain(head, cp0))
+				continue;
+			/* fall through */
+		case CCS_EXCEPTION_POLICY:
+			if (!strcmp(cp0, "select transition_only")) {
+				head->r.print_transition_related_only = true;
+				continue;
+			}
+			/* fall through */
+		default:
+			if (!ccs_manager()) {
+				error = -EPERM;
+				goto out;
+			}
+		}
+		switch (ccs_parse_policy(head, cp0)) {
+		case -EPERM:
+			error = -EPERM;
+			goto out;
+		case 0:
+			/* Update statistics. */
+			switch (head->type) {
+			case CCS_DOMAIN_POLICY:
+			case CCS_EXCEPTION_POLICY:
+			case CCS_STAT:
+			case CCS_PROFILE:
+			case CCS_MANAGER:
+				ccs_update_stat(CCS_STAT_POLICY_UPDATES);
+				break;
+			default:
+				break;
+			}
+			break;
+		}
+	}
+out:
+	ccs_read_unlock(idx);
+	mutex_unlock(&head->io_sem);
+	return error;
+}
+
+/**
+ * ccs_create_entry - Create interface files under /proc/ccs/ directory.
+ *
+ * @name:   The name of the interface file.
+ * @mode:   The permission of the interface file.
+ * @parent: The parent directory.
+ * @key:    Type of interface.
+ *
+ * Returns nothing.
+ */
+static void __init ccs_create_entry(const char *name, const umode_t mode,
+				    struct proc_dir_entry *parent,
+				    const u8 key)
+{
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 26)
+	proc_create_data(name, mode, parent, &ccs_operations,
+			 ((u8 *) NULL) + key);
+#else
+	struct proc_dir_entry *entry = create_proc_entry(name, mode, parent);
+	if (entry) {
+		entry->proc_fops = &ccs_operations;
+		entry->data = ((u8 *) NULL) + key;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0)
+		if (entry->proc_iops)
+			ccs_file_inode_operations = *entry->proc_iops;
+		if (!ccs_file_inode_operations.setattr)
+			ccs_file_inode_operations.setattr = proc_notify_change;
+		entry->proc_iops = &ccs_file_inode_operations;
+#endif
+	}
+#endif
+}
+
+/**
+ * ccs_proc_init - Initialize /proc/ccs/ interface.
+ *
+ * Returns nothing.
+ */
+static void __init ccs_proc_init(void)
+{
+	struct proc_dir_entry *ccs_dir = proc_mkdir("ccs", NULL);
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0)
+	if (ccs_dir->proc_iops)
+		ccs_dir_inode_operations = *ccs_dir->proc_iops;
+	if (!ccs_dir_inode_operations.setattr)
+		ccs_dir_inode_operations.setattr = proc_notify_change;
+	ccs_dir->proc_iops = &ccs_dir_inode_operations;
+#endif
+	ccs_create_entry("query",            0600, ccs_dir, CCS_QUERY);
+	ccs_create_entry("domain_policy",    0600, ccs_dir, CCS_DOMAIN_POLICY);
+	ccs_create_entry("exception_policy", 0600, ccs_dir,
+			 CCS_EXCEPTION_POLICY);
+	ccs_create_entry("audit",            0400, ccs_dir, CCS_AUDIT);
+	ccs_create_entry(".process_status",  0600, ccs_dir,
+			 CCS_PROCESS_STATUS);
+	ccs_create_entry("stat",             0644, ccs_dir, CCS_STAT);
+	ccs_create_entry("profile",          0600, ccs_dir, CCS_PROFILE);
+	ccs_create_entry("manager",          0600, ccs_dir, CCS_MANAGER);
+	ccs_create_entry("version",          0400, ccs_dir, CCS_VERSION);
+#ifdef CONFIG_CCSECURITY_TASK_EXECUTE_HANDLER
+	ccs_create_entry(".execute_handler", 0666, ccs_dir,
+			 CCS_EXECUTE_HANDLER);
+#endif
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 26)
+	proc_create("self_domain", 0666, ccs_dir, &ccs_self_operations);
+#else
+	{
+		struct proc_dir_entry *e = create_proc_entry("self_domain",
+							     0666, ccs_dir);
+		if (e)
+			e->proc_fops = &ccs_self_operations;
+	}
+#endif
+}
+
+/**
+ * ccs_init_module - Initialize this module.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int __init ccs_init_module(void)
+{
+	if (ccsecurity_ops.disabled)
+		return -EINVAL;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 0)
+	MOD_INC_USE_COUNT;
+#endif
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 19)
+	if (init_srcu_struct(&ccs_ss))
+		panic("Out of memory.");
+#endif
+	ccs_kernel_namespace.name = "<kernel>";
+	ccs_init_policy_namespace(&ccs_kernel_namespace);
+	ccs_kernel_domain.ns = &ccs_kernel_namespace;
+	INIT_LIST_HEAD(&ccs_kernel_domain.acl_info_list);
+	ccs_mm_init();
+	ccs_policy_io_init();
+	ccs_permission_init();
+	ccs_proc_init();
+	ccs_load_builtin_policy();
+	return 0;
+}
+
+MODULE_LICENSE("GPL");
+module_init(ccs_init_module);
diff --git a/security/ccsecurity/realpath.c b/security/ccsecurity/realpath.c
new file mode 100644
index 0000000..df821ed
--- /dev/null
+++ b/security/ccsecurity/realpath.c
@@ -0,0 +1,767 @@
+/*
+ * security/ccsecurity/realpath.c
+ *
+ * Copyright (C) 2005-2012  NTT DATA CORPORATION
+ *
+ * Version: 1.8.4   2015/05/05
+ */
+
+#include "internal.h"
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 36) && LINUX_VERSION_CODE < KERNEL_VERSION(3, 2, 0)
+#include <linux/nsproxy.h>
+#include <linux/mnt_namespace.h>
+#endif
+
+/***** SECTION1: Constants definition *****/
+
+#define SOCKFS_MAGIC 0x534F434B
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0)
+#define s_fs_info u.generic_sbp
+#endif
+
+/***** SECTION2: Structure definition *****/
+
+/***** SECTION3: Prototype definition section *****/
+
+char *ccs_encode(const char *str);
+char *ccs_encode2(const char *str, int str_len);
+char *ccs_realpath(const struct path *path);
+const char *ccs_get_exe(void);
+void ccs_fill_path_info(struct ccs_path_info *ptr);
+
+static char *ccs_get_absolute_path(const struct path *path,
+				   char * const buffer, const int buflen);
+static char *ccs_get_dentry_path(struct dentry *dentry, char * const buffer,
+				 const int buflen);
+static char *ccs_get_local_path(struct dentry *dentry, char * const buffer,
+				const int buflen);
+static char *ccs_get_socket_name(const struct path *path, char * const buffer,
+				 const int buflen);
+static int ccs_const_part_length(const char *filename);
+
+/***** SECTION4: Standalone functions section *****/
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0)
+
+/**
+ * SOCKET_I - Get "struct socket".
+ *
+ * @inode: Pointer to "struct inode".
+ *
+ * Returns pointer to "struct socket".
+ *
+ * This is for compatibility with older kernels.
+ */
+static inline struct socket *SOCKET_I(struct inode *inode)
+{
+	return inode->i_sock ? &inode->u.socket_i : NULL;
+}
+
+#endif
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 37)
+
+/**
+ * ccs_realpath_lock - Take locks for __d_path().
+ *
+ * Returns nothing.
+ */
+static inline void ccs_realpath_lock(void)
+{
+	/* dcache_lock is locked by __d_path(). */
+	/* vfsmount_lock is locked by __d_path(). */
+}
+
+/**
+ * ccs_realpath_unlock - Release locks for __d_path().
+ *
+ * Returns nothing.
+ */
+static inline void ccs_realpath_unlock(void)
+{
+	/* vfsmount_lock is unlocked by __d_path(). */
+	/* dcache_lock is unlocked by __d_path(). */
+}
+
+#elif LINUX_VERSION_CODE == KERNEL_VERSION(2, 6, 36)
+
+/**
+ * ccs_realpath_lock - Take locks for __d_path().
+ *
+ * Returns nothing.
+ */
+static inline void ccs_realpath_lock(void)
+{
+	spin_lock(&dcache_lock);
+	/* vfsmount_lock is locked by __d_path(). */
+}
+
+/**
+ * ccs_realpath_unlock - Release locks for __d_path().
+ *
+ * Returns nothing.
+ */
+static inline void ccs_realpath_unlock(void)
+{
+	/* vfsmount_lock is unlocked by __d_path(). */
+	spin_unlock(&dcache_lock);
+}
+
+#elif defined(D_PATH_DISCONNECT) && !defined(CONFIG_SUSE_KERNEL)
+
+/**
+ * ccs_realpath_lock - Take locks for __d_path().
+ *
+ * Returns nothing.
+ *
+ * Original unambiguous-__d_path.diff in patches.apparmor.tar.bz2 inversed the
+ * order of holding dcache_lock and vfsmount_lock. That patch was applied on
+ * (at least) SUSE 11.1 and Ubuntu 8.10 and Ubuntu 9.04 kernels.
+ *
+ * However, that patch was updated to use original order and the updated patch
+ * is applied to (as far as I know) only SUSE kernels.
+ *
+ * Therefore, I need to use original order for SUSE 11.1 kernels and inversed
+ * order for other kernels. I detect it by checking D_PATH_DISCONNECT and
+ * CONFIG_SUSE_KERNEL. I don't know whether other distributions are using the
+ * updated patch or not. If you got deadlock, check fs/dcache.c for locking
+ * order, and add " && 0" to this "#elif " block if fs/dcache.c uses original
+ * order.
+ */
+static inline void ccs_realpath_lock(void)
+{
+	spin_lock(ccsecurity_exports.vfsmount_lock);
+	spin_lock(&dcache_lock);
+}
+
+/**
+ * ccs_realpath_unlock - Release locks for __d_path().
+ *
+ * Returns nothing.
+ */
+static inline void ccs_realpath_unlock(void)
+{
+	spin_unlock(&dcache_lock);
+	spin_unlock(ccsecurity_exports.vfsmount_lock);
+}
+
+#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 0)
+
+/**
+ * ccs_realpath_lock - Take locks for __d_path().
+ *
+ * Returns nothing.
+ */
+static inline void ccs_realpath_lock(void)
+{
+	spin_lock(&dcache_lock);
+	spin_lock(ccsecurity_exports.vfsmount_lock);
+}
+
+/**
+ * ccs_realpath_unlock - Release locks for __d_path().
+ *
+ * Returns nothing.
+ */
+static inline void ccs_realpath_unlock(void)
+{
+	spin_unlock(ccsecurity_exports.vfsmount_lock);
+	spin_unlock(&dcache_lock);
+}
+
+#else
+
+/**
+ * ccs_realpath_lock - Take locks for __d_path().
+ *
+ * Returns nothing.
+ */
+static inline void ccs_realpath_lock(void)
+{
+	spin_lock(&dcache_lock);
+}
+
+/**
+ * ccs_realpath_unlock - Release locks for __d_path().
+ *
+ * Returns nothing.
+ */
+static inline void ccs_realpath_unlock(void)
+{
+	spin_unlock(&dcache_lock);
+}
+
+#endif
+
+/***** SECTION5: Variables definition section *****/
+
+/***** SECTION6: Dependent functions section *****/
+
+/**
+ * ccs_get_absolute_path - Get the path of a dentry but ignores chroot'ed root.
+ *
+ * @path:   Pointer to "struct path".
+ * @buffer: Pointer to buffer to return value in.
+ * @buflen: Sizeof @buffer.
+ *
+ * Returns the buffer on success, an error code otherwise.
+ *
+ * Caller holds the dcache_lock and vfsmount_lock.
+ * Based on __d_path() in fs/dcache.c
+ *
+ * If dentry is a directory, trailing '/' is appended.
+ */
+static char *ccs_get_absolute_path(const struct path *path,
+				   char * const buffer, const int buflen)
+{
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 2, 0)
+	char *pos = ERR_PTR(-ENOMEM);
+	if (buflen >= 256) {
+		pos = ccsecurity_exports.d_absolute_path(path, buffer,
+							 buflen - 1);
+		if (!IS_ERR(pos) && *pos == '/' && pos[1]) {
+			struct inode *inode = path->dentry->d_inode;
+			if (inode && S_ISDIR(inode->i_mode)) {
+				buffer[buflen - 2] = '/';
+				buffer[buflen - 1] = '\0';
+			}
+		}
+	}
+	return pos;
+#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 36)
+	/*
+	 * __d_path() will start returning NULL by backporting commit 02125a82
+	 * "fix apparmor dereferencing potentially freed dentry, sanitize
+	 * __d_path() API".
+	 *
+	 * Unfortunately, __d_path() after applying that commit always returns
+	 * NULL when root is empty. d_absolute_path() is provided for TOMOYO
+	 * 2.x and AppArmor but TOMOYO 1.x does not use it, for TOMOYO 1.x
+	 * might be built as a loadable kernel module and there is no warrantee
+	 * that TOMOYO 1.x is recompiled after applying that commit. Also,
+	 * I don't want to search /proc/kallsyms for d_absolute_path() because
+	 * I want to keep TOMOYO 1.x architecture independent. Thus, supply
+	 * non empty root like AppArmor's d_namespace_path() did.
+	 */
+	char *pos = ERR_PTR(-ENOMEM);
+	if (buflen >= 256) {
+		static bool ccs_no_empty;
+		if (!ccs_no_empty) {
+			struct path root = { };
+			pos = ccsecurity_exports.__d_path(path, &root, buffer,
+							  buflen - 1);
+		} else {
+			pos = NULL;
+		}
+		if (!pos) {
+			struct task_struct *task = current;
+			struct path root;
+			struct path tmp;
+			spin_lock(&task->fs->lock);
+			root.mnt = task->nsproxy->mnt_ns->root;
+			root.dentry = root.mnt->mnt_root;
+			path_get(&root);
+			spin_unlock(&task->fs->lock);
+			tmp = root;
+			pos = ccsecurity_exports.__d_path(path, &tmp, buffer,
+							  buflen - 1);
+			path_put(&root);
+			if (!pos)
+				return ERR_PTR(-EINVAL);
+			/* Remember if __d_path() needs non empty root. */
+			ccs_no_empty = true;
+		}
+		if (!IS_ERR(pos) && *pos == '/' && pos[1]) {
+			struct inode *inode = path->dentry->d_inode;
+			if (inode && S_ISDIR(inode->i_mode)) {
+				buffer[buflen - 2] = '/';
+				buffer[buflen - 1] = '\0';
+			}
+		}
+	}
+	return pos;
+#else
+	char *pos = buffer + buflen - 1;
+	struct dentry *dentry = path->dentry;
+	struct vfsmount *vfsmnt = path->mnt;
+	const char *name;
+	int len;
+
+	if (buflen < 256)
+		goto out;
+
+	*pos = '\0';
+	if (dentry->d_inode && S_ISDIR(dentry->d_inode->i_mode))
+		*--pos = '/';
+	for (;;) {
+		struct dentry *parent;
+		if (dentry == vfsmnt->mnt_root || IS_ROOT(dentry)) {
+			if (vfsmnt->mnt_parent == vfsmnt)
+				break;
+			dentry = vfsmnt->mnt_mountpoint;
+			vfsmnt = vfsmnt->mnt_parent;
+			continue;
+		}
+		parent = dentry->d_parent;
+		name = dentry->d_name.name;
+		len = dentry->d_name.len;
+		pos -= len;
+		if (pos <= buffer)
+			goto out;
+		memmove(pos, name, len);
+		*--pos = '/';
+		dentry = parent;
+	}
+	if (*pos == '/')
+		pos++;
+	len = dentry->d_name.len;
+	pos -= len;
+	if (pos < buffer)
+		goto out;
+	memmove(pos, dentry->d_name.name, len);
+	return pos;
+out:
+	return ERR_PTR(-ENOMEM);
+#endif
+}
+
+/**
+ * ccs_get_dentry_path - Get the path of a dentry.
+ *
+ * @dentry: Pointer to "struct dentry".
+ * @buffer: Pointer to buffer to return value in.
+ * @buflen: Sizeof @buffer.
+ *
+ * Returns the buffer on success, an error code otherwise.
+ *
+ * Based on dentry_path() in fs/dcache.c
+ *
+ * If dentry is a directory, trailing '/' is appended.
+ */
+static char *ccs_get_dentry_path(struct dentry *dentry, char * const buffer,
+				 const int buflen)
+{
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 1, 0)
+	char *pos = ERR_PTR(-ENOMEM);
+	if (buflen >= 256) {
+		pos = dentry_path_raw(dentry, buffer, buflen - 1);
+		if (!IS_ERR(pos) && *pos == '/' && pos[1] &&
+		    d_is_dir(dentry)) {
+			buffer[buflen - 2] = '/';
+			buffer[buflen - 1] = '\0';
+		}
+	}
+	return pos;
+#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 38)
+	char *pos = ERR_PTR(-ENOMEM);
+	if (buflen >= 256) {
+		/* rename_lock is locked/unlocked by dentry_path_raw(). */
+		pos = dentry_path_raw(dentry, buffer, buflen - 1);
+		if (!IS_ERR(pos) && *pos == '/' && pos[1]) {
+			struct inode *inode = dentry->d_inode;
+			if (inode && S_ISDIR(inode->i_mode)) {
+				buffer[buflen - 2] = '/';
+				buffer[buflen - 1] = '\0';
+			}
+		}
+	}
+	return pos;
+#else
+	char *pos = buffer + buflen - 1;
+	if (buflen < 256)
+		return ERR_PTR(-ENOMEM);
+	*pos = '\0';
+	if (dentry->d_inode && S_ISDIR(dentry->d_inode->i_mode))
+		*--pos = '/';
+	spin_lock(&dcache_lock);
+	while (!IS_ROOT(dentry)) {
+		struct dentry *parent = dentry->d_parent;
+		const char *name = dentry->d_name.name;
+		const int len = dentry->d_name.len;
+		pos -= len;
+		if (pos <= buffer) {
+			pos = ERR_PTR(-ENOMEM);
+			break;
+		}
+		memmove(pos, name, len);
+		*--pos = '/';
+		dentry = parent;
+	}
+	spin_unlock(&dcache_lock);
+	return pos;
+#endif
+}
+
+/**
+ * ccs_get_local_path - Get the path of a dentry.
+ *
+ * @dentry: Pointer to "struct dentry".
+ * @buffer: Pointer to buffer to return value in.
+ * @buflen: Sizeof @buffer.
+ *
+ * Returns the buffer on success, an error code otherwise.
+ */
+static char *ccs_get_local_path(struct dentry *dentry, char * const buffer,
+				const int buflen)
+{
+	struct super_block *sb = dentry->d_sb;
+	char *pos = ccs_get_dentry_path(dentry, buffer, buflen);
+	if (IS_ERR(pos))
+		return pos;
+	/* Convert from $PID to self if $PID is current thread. */
+	if (sb->s_magic == PROC_SUPER_MAGIC && *pos == '/') {
+		char *ep;
+		const pid_t pid = (pid_t) simple_strtoul(pos + 1, &ep, 10);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25)
+		if (*ep == '/' && pid && pid ==
+		    task_tgid_nr_ns(current, sb->s_fs_info)) {
+			pos = ep - 5;
+			if (pos < buffer)
+				goto out;
+			memmove(pos, "/self", 5);
+		}
+#else
+		if (*ep == '/' && pid == ccs_sys_getpid()) {
+			pos = ep - 5;
+			if (pos < buffer)
+				goto out;
+			memmove(pos, "/self", 5);
+		}
+#endif
+		goto prepend_filesystem_name;
+	}
+	/* Use filesystem name for unnamed devices. */
+	if (!MAJOR(sb->s_dev))
+		goto prepend_filesystem_name;
+	{
+		struct inode *inode = sb->s_root->d_inode;
+		/*
+		 * Use filesystem name if filesystems does not support rename()
+		 * operation.
+		 */
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 17, 0)
+		if (inode->i_op && !inode->i_op->rename)
+			goto prepend_filesystem_name;
+#else
+		if (!inode->i_op->rename && !inode->i_op->rename2)
+			goto prepend_filesystem_name;
+#endif
+	}
+	/* Prepend device name. */
+	{
+		char name[64];
+		int name_len;
+		const dev_t dev = sb->s_dev;
+		name[sizeof(name) - 1] = '\0';
+		snprintf(name, sizeof(name) - 1, "dev(%u,%u):", MAJOR(dev),
+			 MINOR(dev));
+		name_len = strlen(name);
+		pos -= name_len;
+		if (pos < buffer)
+			goto out;
+		memmove(pos, name, name_len);
+		return pos;
+	}
+	/* Prepend filesystem name. */
+prepend_filesystem_name:
+	{
+		const char *name = sb->s_type->name;
+		const int name_len = strlen(name);
+		pos -= name_len + 1;
+		if (pos < buffer)
+			goto out;
+		memmove(pos, name, name_len);
+		pos[name_len] = ':';
+	}
+	return pos;
+out:
+	return ERR_PTR(-ENOMEM);
+}
+
+/**
+ * ccs_get_socket_name - Get the name of a socket.
+ *
+ * @path:   Pointer to "struct path".
+ * @buffer: Pointer to buffer to return value in.
+ * @buflen: Sizeof @buffer.
+ *
+ * Returns the buffer.
+ */
+static char *ccs_get_socket_name(const struct path *path, char * const buffer,
+				 const int buflen)
+{
+	struct inode *inode = path->dentry->d_inode;
+	struct socket *sock = inode ? SOCKET_I(inode) : NULL;
+	struct sock *sk = sock ? sock->sk : NULL;
+	if (sk) {
+		snprintf(buffer, buflen, "socket:[family=%u:type=%u:"
+			 "protocol=%u]", sk->sk_family, sk->sk_type,
+			 sk->sk_protocol);
+	} else {
+		snprintf(buffer, buflen, "socket:[unknown]");
+	}
+	return buffer;
+}
+
+#define SOCKFS_MAGIC 0x534F434B
+
+/**
+ * ccs_realpath - Returns realpath(3) of the given pathname but ignores chroot'ed root.
+ *
+ * @path: Pointer to "struct path".
+ *
+ * Returns the realpath of the given @path on success, NULL otherwise.
+ *
+ * This function uses kzalloc(), so caller must kfree() if this function
+ * didn't return NULL.
+ */
+char *ccs_realpath(const struct path *path)
+{
+	char *buf = NULL;
+	char *name = NULL;
+	unsigned int buf_len = PAGE_SIZE / 2;
+	struct dentry *dentry = path->dentry;
+	struct super_block *sb;
+	if (!dentry)
+		return NULL;
+	sb = dentry->d_sb;
+	while (1) {
+		char *pos;
+		struct inode *inode;
+		buf_len <<= 1;
+		kfree(buf);
+		buf = kmalloc(buf_len, CCS_GFP_FLAGS);
+		if (!buf)
+			break;
+		/* To make sure that pos is '\0' terminated. */
+		buf[buf_len - 1] = '\0';
+		/* Get better name for socket. */
+		if (sb->s_magic == SOCKFS_MAGIC) {
+			pos = ccs_get_socket_name(path, buf, buf_len - 1);
+			goto encode;
+		}
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 22)
+		/* For "pipe:[\$]". */
+		if (dentry->d_op && dentry->d_op->d_dname) {
+			pos = dentry->d_op->d_dname(dentry, buf, buf_len - 1);
+			goto encode;
+		}
+#endif
+		inode = sb->s_root->d_inode;
+		/*
+		 * Use local name for "filesystems without rename() operation"
+		 * or "path without vfsmount" or "absolute name is unavailable"
+		 * cases.
+		 */
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 17, 0)
+		if (!path->mnt || (inode->i_op && !inode->i_op->rename))
+			pos = ERR_PTR(-EINVAL);
+		else {
+			/* Get absolute name for the rest. */
+			ccs_realpath_lock();
+			pos = ccs_get_absolute_path(path, buf, buf_len - 1);
+			ccs_realpath_unlock();
+		}
+		if (pos == ERR_PTR(-EINVAL))
+			pos = ccs_get_local_path(path->dentry, buf,
+						 buf_len - 1);
+#else
+		if (!path->mnt ||
+		    (!inode->i_op->rename && !inode->i_op->rename2))
+			pos = ccs_get_local_path(path->dentry, buf,
+						 buf_len - 1);
+		else
+			pos = ccs_get_absolute_path(path, buf, buf_len - 1);
+#endif
+encode:
+		if (IS_ERR(pos))
+			continue;
+		name = ccs_encode(pos);
+		break;
+	}
+	kfree(buf);
+	if (!name)
+		ccs_warn_oom(__func__);
+	return name;
+}
+
+/**
+ * ccs_encode2 - Encode binary string to ascii string.
+ *
+ * @str:     String in binary format.
+ * @str_len: Size of @str in byte.
+ *
+ * Returns pointer to @str in ascii format on success, NULL otherwise.
+ *
+ * This function uses kzalloc(), so caller must kfree() if this function
+ * didn't return NULL.
+ */
+char *ccs_encode2(const char *str, int str_len)
+{
+	int i;
+	int len = 0;
+	const char *p = str;
+	char *cp;
+	char *cp0;
+	if (!p)
+		return NULL;
+	for (i = 0; i < str_len; i++) {
+		const unsigned char c = p[i];
+		if (c == '\\')
+			len += 2;
+		else if (c > ' ' && c < 127)
+			len++;
+		else
+			len += 4;
+	}
+	len++;
+	/* Reserve space for appending "/". */
+	cp = kzalloc(len + 10, CCS_GFP_FLAGS);
+	if (!cp)
+		return NULL;
+	cp0 = cp;
+	p = str;
+	for (i = 0; i < str_len; i++) {
+		const unsigned char c = p[i];
+		if (c == '\\') {
+			*cp++ = '\\';
+			*cp++ = '\\';
+		} else if (c > ' ' && c < 127) {
+			*cp++ = c;
+		} else {
+			*cp++ = '\\';
+			*cp++ = (c >> 6) + '0';
+			*cp++ = ((c >> 3) & 7) + '0';
+			*cp++ = (c & 7) + '0';
+		}
+	}
+	return cp0;
+}
+
+/**
+ * ccs_encode - Encode binary string to ascii string.
+ *
+ * @str: String in binary format.
+ *
+ * Returns pointer to @str in ascii format on success, NULL otherwise.
+ *
+ * This function uses kzalloc(), so caller must kfree() if this function
+ * didn't return NULL.
+ */
+char *ccs_encode(const char *str)
+{
+	return str ? ccs_encode2(str, strlen(str)) : NULL;
+}
+
+/**
+ * ccs_const_part_length - Evaluate the initial length without a pattern in a token.
+ *
+ * @filename: The string to evaluate.
+ *
+ * Returns the initial length without a pattern in @filename.
+ */
+static int ccs_const_part_length(const char *filename)
+{
+	char c;
+	int len = 0;
+	if (!filename)
+		return 0;
+	while (1) {
+		c = *filename++;
+		if (!c)
+			break;
+		if (c != '\\') {
+			len++;
+			continue;
+		}
+		c = *filename++;
+		switch (c) {
+		case '\\':  /* "\\" */
+			len += 2;
+			continue;
+		case '0':   /* "\ooo" */
+		case '1':
+		case '2':
+		case '3':
+			c = *filename++;
+			if (c < '0' || c > '7')
+				break;
+			c = *filename++;
+			if (c < '0' || c > '7')
+				break;
+			len += 4;
+			continue;
+		}
+		break;
+	}
+	return len;
+}
+
+/**
+ * ccs_fill_path_info - Fill in "struct ccs_path_info" members.
+ *
+ * @ptr: Pointer to "struct ccs_path_info" to fill in.
+ *
+ * The caller sets "struct ccs_path_info"->name.
+ */
+void ccs_fill_path_info(struct ccs_path_info *ptr)
+{
+	const char *name = ptr->name;
+	const int len = strlen(name);
+	ptr->total_len = len;
+	ptr->const_len = ccs_const_part_length(name);
+	ptr->is_dir = len && (name[len - 1] == '/');
+	ptr->is_patterned = (ptr->const_len < len);
+	ptr->hash = full_name_hash(name, len);
+}
+
+/**
+ * ccs_get_exe - Get ccs_realpath() of current process.
+ *
+ * Returns the ccs_realpath() of current process on success, NULL otherwise.
+ *
+ * This function uses kzalloc(), so the caller must kfree()
+ * if this function didn't return NULL.
+ */
+const char *ccs_get_exe(void)
+{
+	struct mm_struct *mm = current->mm;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 26)
+	struct vm_area_struct *vma;
+#endif
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 20)
+	struct path path;
+#endif
+	struct file *exe_file = NULL;
+	const char *cp;
+	if (!mm)
+		return NULL;
+	down_read(&mm->mmap_sem);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 26)
+	/* Not using get_mm_exe_file() as it is not exported. */
+	exe_file = mm->exe_file;
+#else
+	for (vma = mm->mmap; vma; vma = vma->vm_next) {
+		if ((vma->vm_flags & VM_EXECUTABLE) && vma->vm_file) {
+			exe_file = vma->vm_file;
+			break;
+		}
+	}
+#endif
+	if (exe_file)
+		get_file(exe_file);
+	up_read(&mm->mmap_sem);
+	if (!exe_file)
+		return NULL;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 20)
+	cp = ccs_realpath(&exe_file->f_path);
+#else
+	path.mnt = exe_file->f_vfsmnt;
+	path.dentry = exe_file->f_dentry;
+	cp = ccs_realpath(&path);
+#endif
+	fput(exe_file);
+	return cp;
+}
-- 
1.9.1