summaryrefslogtreecommitdiffstats
path: root/fs/ceph/xattr.c
AgeCommit message (Expand)Author
2019-09-16ceph: allow arbitrary security.* xattrsJeff Layton
2019-09-16ceph: only set CEPH_I_SEC_INITED if we got a MAC labelJeff Layton
2019-09-16ceph: turn ceph_security_invalidate_secctx into static inlineJeff Layton
2019-09-16ceph: don't list vxattrs in listxattr()Jeff Layton
2019-08-22ceph: fix buffer free while holding i_ceph_lock in __ceph_build_xattrs_blob()Luis Henriques
2019-08-22ceph: fix buffer free while holding i_ceph_lock in __ceph_setxattr()Luis Henriques
2019-07-08ceph: don't NULL terminate virtual xattrsJeff Layton
2019-07-08ceph: return -ERANGE if virtual xattr value didn't fit in bufferJeff Layton
2019-07-08ceph: make getxattr_cb return ssize_tJeff Layton
2019-07-08ceph: add selinux supportYan, Zheng
2019-07-08ceph: rename struct ceph_acls_info to ceph_acl_sec_ctxYan, Zheng
2019-07-08ceph: fix debug print format in __set_xattr()Yan, Zheng
2019-07-08ceph: fix "ceph.dir.rctime" vxattr valueDavid Disseldorp
2019-07-08ceph: remove unused vxattr length helpersDavid Disseldorp
2019-07-08ceph: fix listxattr vxattr buffer length calculationDavid Disseldorp
2019-07-08ceph: add ceph.snap.btime vxattrDavid Disseldorp
2019-07-08ceph: clean up ceph.dir.pin vxattr name sizeof()David Disseldorp
2019-03-05ceph: support getting ceph.dir.pin vxattrYan, Zheng
2018-10-22libceph: introduce ceph_pagelist_alloc()Ilya Dryomov
2018-08-02ceph: use timespec64 for inode timestampArnd Bergmann
2018-06-04ceph: always get rstat from auth mdsYan, Zheng
2018-06-04ceph: use bit flags to define vxattr attributesYan, Zheng
2018-04-23ceph: check if mds create snaprealm when setting quotaYan, Zheng
2018-04-02ceph: quota: add initial infrastructure to support cephfs quotasLuis Henriques
2017-11-02License cleanup: add SPDX GPL-2.0 license identifier to files with no licenseGreg Kroah-Hartman
2017-09-06ceph: adjust 36 checks for NULL pointersMarkus Elfring
2017-07-07ceph: getattr before read on ceph.* xattrsYan, Zheng
2017-05-04ceph: fix memory leak in __ceph_setxattr()Luis Henriques
2016-10-18ceph: fix non static symbol warningWei Yongjun
2016-09-27fs: Replace current_fs_time() with current_time()Deepa Dinamani
2016-07-28ceph: rados pool namespace supportYan, Zheng
2016-07-28libceph: define new ceph_file_layout structureYan, Zheng
2016-05-27Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/vir...Linus Torvalds
2016-05-27switch xattr_handler->set() to passing dentry and inode separatelyAl Viro
2016-05-26Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sag...Linus Torvalds
2016-05-26ceph: use CEPH_MDS_OP_RMXATTR request to remove xattrYan, Zheng
2016-05-26libceph: a major OSD client updateIlya Dryomov
2016-04-23ceph: kill __ceph_removexattr()Yan, Zheng
2016-04-23ceph: Switch to generic xattr handlersAndreas Gruenbacher
2016-04-23ceph: Get rid of d_find_alias in ceph_set_aclAndreas Gruenbacher
2016-04-11->getxattr(): pass dentry and inode as separate argumentsAl Viro
2016-03-25ceph: fix security xattr deadlockYan, Zheng
2016-03-25ceph: don't request vxattrs from MDSYan, Zheng
2016-03-25ceph: replace CURRENT_TIME by current_fs_time()Deepa Dinamani
2015-06-25ceph: pre-allocate data structure that tracks caps flushingYan, Zheng
2015-06-25ceph: take snap_rwsem when accessing snap realm's cached_contextYan, Zheng
2015-04-26Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/vir...Linus Torvalds
2015-04-20ceph: kstrdup() memory handlingSanidhya Kashyap
2015-04-15VFS: normal filesystems (and lustre): d_inode() annotationsDavid Howells
2014-12-17ceph: fix setting empty extended attributeYan, Zheng
generated by cgit 1.2.3-korg (git 2.39.0) at 2024-05-22 13:29:05 +0000
an> next_id = ids->next_id; if (size > IPCMNI) size = IPCMNI; if (ids->in_use >= size) return -ENOSPC; idr_preload(GFP_KERNEL); spin_lock_init(&new->lock); new->deleted = 0; rcu_read_lock(); spin_lock(&new->lock); id = idr_alloc(&ids->ipcs_idr, new, (next_id < 0) ? 0 : ipcid_to_idx(next_id), 0, GFP_NOWAIT); idr_preload_end(); if (id < 0) { spin_unlock(&new->lock); rcu_read_unlock(); return id; } ids->in_use++; current_euid_egid(&euid, &egid); new->cuid = new->uid = euid; new->gid = new->cgid = egid; if (next_id < 0) { new->seq = ids->seq++; if (ids->seq > ids->seq_max) ids->seq = 0; } else { new->seq = ipcid_to_seqx(next_id); ids->next_id = -1; } new->id = ipc_buildid(id, new->seq); return id; } /** * ipcget_new - create a new ipc object * @ns: namespace * @ids: IPC identifer set * @ops: the actual creation routine to call * @params: its parameters * * This routine is called by sys_msgget, sys_semget() and sys_shmget() * when the key is IPC_PRIVATE. */ static int ipcget_new(struct ipc_namespace *ns, struct ipc_ids *ids, struct ipc_ops *ops, struct ipc_params *params) { int err; down_write(&ids->rw_mutex); err = ops->getnew(ns, params); up_write(&ids->rw_mutex); return err; } /** * ipc_check_perms - check security and permissions for an IPC * @ns: IPC namespace * @ipcp: ipc permission set * @ops: the actual security routine to call * @params: its parameters * * This routine is called by sys_msgget(), sys_semget() and sys_shmget() * when the key is not IPC_PRIVATE and that key already exists in the * ids IDR. * * On success, the IPC id is returned. * * It is called with ipc_ids.rw_mutex and ipcp->lock held. */ static int ipc_check_perms(struct ipc_namespace *ns, struct kern_ipc_perm *ipcp, struct ipc_ops *ops, struct ipc_params *params) { int err; if (ipcperms(ns, ipcp, params->flg)) err = -EACCES; else { err = ops->associate(ipcp, params->flg); if (!err) err = ipcp->id; } return err; } /** * ipcget_public - get an ipc object or create a new one * @ns: namespace * @ids: IPC identifer set * @ops: the actual creation routine to call * @params: its parameters * * This routine is called by sys_msgget, sys_semget() and sys_shmget() * when the key is not IPC_PRIVATE. * It adds a new entry if the key is not found and does some permission * / security checkings if the key is found. * * On success, the ipc id is returned. */ static int ipcget_public(struct ipc_namespace *ns, struct ipc_ids *ids, struct ipc_ops *ops, struct ipc_params *params) { struct kern_ipc_perm *ipcp; int flg = params->flg; int err; /* * Take the lock as a writer since we are potentially going to add * a new entry + read locks are not "upgradable" */ down_write(&ids->rw_mutex); ipcp = ipc_findkey(ids, params->key); if (ipcp == NULL) { /* key not used */ if (!(flg & IPC_CREAT)) err = -ENOENT; else err = ops->getnew(ns, params); } else { /* ipc object has been locked by ipc_findkey() */ if (flg & IPC_CREAT && flg & IPC_EXCL) err = -EEXIST; else { err = 0; if (ops->more_checks) err = ops->more_checks(ipcp, params); if (!err) /* * ipc_check_perms returns the IPC id on * success */ err = ipc_check_perms(ns, ipcp, ops, params); } ipc_unlock(ipcp); } up_write(&ids->rw_mutex); return err; } /** * ipc_rmid - remove an IPC identifier * @ids: IPC identifier set * @ipcp: ipc perm structure containing the identifier to remove * * ipc_ids.rw_mutex (as a writer) and the spinlock for this ID are held * before this function is called, and remain locked on the exit. */ void ipc_rmid(struct ipc_ids *ids, struct kern_ipc_perm *ipcp) { int lid = ipcid_to_idx(ipcp->id); idr_remove(&ids->ipcs_idr, lid); ids->in_use--; ipcp->deleted = 1; return; } /** * ipc_alloc - allocate ipc space * @size: size desired * * Allocate memory from the appropriate pools and return a pointer to it. * NULL is returned if the allocation fails */ void *ipc_alloc(int size) { void *out; if(size > PAGE_SIZE) out = vmalloc(size); else out = kmalloc(size, GFP_KERNEL); return out; } /** * ipc_free - free ipc space * @ptr: pointer returned by ipc_alloc * @size: size of block * * Free a block created with ipc_alloc(). The caller must know the size * used in the allocation call. */ void ipc_free(void* ptr, int size) { if(size > PAGE_SIZE) vfree(ptr); else kfree(ptr); } struct ipc_rcu { struct rcu_head rcu; atomic_t refcount; /* "void *" makes sure alignment of following data is sane. */ void *data[0]; }; /** * ipc_rcu_alloc - allocate ipc and rcu space * @size: size desired * * Allocate memory for the rcu header structure + the object. * Returns the pointer to the object or NULL upon failure. */ void *ipc_rcu_alloc(int size) { /* * We prepend the allocation with the rcu struct */ struct ipc_rcu *out = ipc_alloc(sizeof(struct ipc_rcu) + size); if (unlikely(!out)) return NULL; atomic_set(&out->refcount, 1); return out->data; } int ipc_rcu_getref(void *ptr) { return atomic_inc_not_zero(&container_of(ptr, struct ipc_rcu, data)->refcount); } /** * ipc_schedule_free - free ipc + rcu space * @head: RCU callback structure for queued work */ static void ipc_schedule_free(struct rcu_head *head) { vfree(container_of(head, struct ipc_rcu, rcu)); } void ipc_rcu_putref(void *ptr) { struct ipc_rcu *p = container_of(ptr, struct ipc_rcu, data); if (!atomic_dec_and_test(&p->refcount)) return; if (is_vmalloc_addr(ptr)) { call_rcu(&p->rcu, ipc_schedule_free); } else { kfree_rcu(p, rcu); } } /** * ipcperms - check IPC permissions * @ns: IPC namespace * @ipcp: IPC permission set * @flag: desired permission set. * * Check user, group, other permissions for access * to ipc resources. return 0 if allowed * * @flag will most probably be 0 or S_...UGO from <linux/stat.h> */ int ipcperms(struct ipc_namespace *ns, struct kern_ipc_perm *ipcp, short flag) { kuid_t euid = current_euid(); int requested_mode, granted_mode; audit_ipc_obj(ipcp); requested_mode = (flag >> 6) | (flag >> 3) | flag; granted_mode = ipcp->mode; if (uid_eq(euid, ipcp->cuid) || uid_eq(euid, ipcp->uid)) granted_mode >>= 6; else if (in_group_p(ipcp->cgid) || in_group_p(ipcp->gid)) granted_mode >>= 3; /* is there some bit set in requested_mode but not in granted_mode? */ if ((requested_mode & ~granted_mode & 0007) && !ns_capable(ns->user_ns, CAP_IPC_OWNER)) return -1; return security_ipc_permission(ipcp, flag); } /* * Functions to convert between the kern_ipc_perm structure and the * old/new ipc_perm structures */ /** * kernel_to_ipc64_perm - convert kernel ipc permissions to user * @in: kernel permissions * @out: new style IPC permissions * * Turn the kernel object @in into a set of permissions descriptions * for returning to userspace (@out). */ void kernel_to_ipc64_perm (struct kern_ipc_perm *in, struct ipc64_perm *out) { out->key = in->key; out->uid = from_kuid_munged(current_user_ns(), in->uid); out->gid = from_kgid_munged(current_user_ns(), in->gid); out->cuid = from_kuid_munged(current_user_ns(), in->cuid); out->cgid = from_kgid_munged(current_user_ns(), in->cgid); out->mode = in->mode; out->seq = in->seq; } /** * ipc64_perm_to_ipc_perm - convert new ipc permissions to old * @in: new style IPC permissions * @out: old style IPC permissions * * Turn the new style permissions object @in into a compatibility * object and store it into the @out pointer. */ void ipc64_perm_to_ipc_perm (struct ipc64_perm *in, struct ipc_perm *out) { out->key = in->key; SET_UID(out->uid, in->uid); SET_GID(out->gid, in->gid); SET_UID(out->cuid, in->cuid); SET_GID(out->cgid, in->cgid); out->mode = in->mode; out->seq = in->seq; } /** * ipc_obtain_object * @ids: ipc identifier set * @id: ipc id to look for * * Look for an id in the ipc ids idr and return associated ipc object. * * Call inside the RCU critical section. * The ipc object is *not* locked on exit. */ struct kern_ipc_perm *ipc_obtain_object(struct ipc_ids *ids, int id) { struct kern_ipc_perm *out; int lid = ipcid_to_idx(id); out = idr_find(&ids->ipcs_idr, lid); if (!out) return ERR_PTR(-EINVAL); return out; } /** * ipc_lock - Lock an ipc structure without rw_mutex held * @ids: IPC identifier set * @id: ipc id to look for * * Look for an id in the ipc ids idr and lock the associated ipc object. * * The ipc object is locked on successful exit. */ struct kern_ipc_perm *ipc_lock(struct ipc_ids *ids, int id) { struct kern_ipc_perm *out; rcu_read_lock(); out = ipc_obtain_object(ids, id); if (IS_ERR(out)) goto err1; spin_lock(&out->lock); /* ipc_rmid() may have already freed the ID while ipc_lock * was spinning: here verify that the structure is still valid */ if (!out->deleted) return out; spin_unlock(&out->lock); out = ERR_PTR(-EINVAL); err1: rcu_read_unlock(); return out; } /** * ipc_obtain_object_check * @ids: ipc identifier set * @id: ipc id to look for * * Similar to ipc_obtain_object() but also checks * the ipc object reference counter. * * Call inside the RCU critical section. * The ipc object is *not* locked on exit. */ struct kern_ipc_perm *ipc_obtain_object_check(struct ipc_ids *ids, int id) { struct kern_ipc_perm *out = ipc_obtain_object(ids, id); if (IS_ERR(out)) goto out; if (ipc_checkid(out, id)) return ERR_PTR(-EIDRM); out: return out; } struct kern_ipc_perm *ipc_lock_check(struct ipc_ids *ids, int id) { struct kern_ipc_perm *out; out = ipc_lock(ids, id); if (IS_ERR(out)) return out; if (ipc_checkid(out, id)) { ipc_unlock(out); return ERR_PTR(-EIDRM); } return out; } /** * ipcget - Common sys_*get() code * @ns : namsepace * @ids : IPC identifier set * @ops : operations to be called on ipc object creation, permission checks * and further checks * @params : the parameters needed by the previous operations. * * Common routine called by sys_msgget(), sys_semget() and sys_shmget(). */ int ipcget(struct ipc_namespace *ns, struct ipc_ids *ids, struct ipc_ops *ops, struct ipc_params *params) { if (params->key == IPC_PRIVATE) return ipcget_new(ns, ids, ops, params); else return ipcget_public(ns, ids, ops, params); } /** * ipc_update_perm - update the permissions of an IPC. * @in: the permission given as input. * @out: the permission of the ipc to set. */ int ipc_update_perm(struct ipc64_perm *in, struct kern_ipc_perm *out) { kuid_t uid = make_kuid(current_user_ns(), in->uid); kgid_t gid = make_kgid(current_user_ns(), in->gid); if (!uid_valid(uid) || !gid_valid(gid)) return -EINVAL; out->uid = uid; out->gid = gid; out->mode = (out->mode & ~S_IRWXUGO) | (in->mode & S_IRWXUGO); return 0; } /** * ipcctl_pre_down - retrieve an ipc and check permissions for some IPC_XXX cmd * @ns: the ipc namespace * @ids: the table of ids where to look for the ipc * @id: the id of the ipc to retrieve * @cmd: the cmd to check * @perm: the permission to set * @extra_perm: one extra permission parameter used by msq * * This function does some common audit and permissions check for some IPC_XXX * cmd and is called from semctl_down, shmctl_down and msgctl_down. * It must be called without any lock held and * - retrieves the ipc with the given id in the given table. * - performs some audit and permission check, depending on the given cmd * - returns the ipc with both ipc and rw_mutex locks held in case of success * or an err-code without any lock held otherwise. */ struct kern_ipc_perm *ipcctl_pre_down(struct ipc_namespace *ns, struct ipc_ids *ids, int id, int cmd, struct ipc64_perm *perm, int extra_perm) { struct kern_ipc_perm *ipcp; ipcp = ipcctl_pre_down_nolock(ns, ids, id, cmd, perm, extra_perm); if (IS_ERR(ipcp)) goto out; spin_lock(&ipcp->lock); out: return ipcp; } struct kern_ipc_perm *ipcctl_pre_down_nolock(struct ipc_namespace *ns, struct ipc_ids *ids, int id, int cmd, struct ipc64_perm *perm, int extra_perm) { kuid_t euid; int err = -EPERM; struct kern_ipc_perm *ipcp; down_write(&ids->rw_mutex); rcu_read_lock(); ipcp = ipc_obtain_object_check(ids, id); if (IS_ERR(ipcp)) { err = PTR_ERR(ipcp); goto out_up; } audit_ipc_obj(ipcp); if (cmd == IPC_SET) audit_ipc_set_perm(extra_perm, perm->uid, perm->gid, perm->mode); euid = current_euid(); if (uid_eq(euid, ipcp->cuid) || uid_eq(euid, ipcp->uid) || ns_capable(ns->user_ns, CAP_SYS_ADMIN)) return ipcp; out_up: /* * Unsuccessful lookup, unlock and return * the corresponding error. */ rcu_read_unlock(); up_write(&ids->rw_mutex); return ERR_PTR(err); } #ifdef CONFIG_ARCH_WANT_IPC_PARSE_VERSION /** * ipc_parse_version - IPC call version * @cmd: pointer to command * * Return IPC_64 for new style IPC and IPC_OLD for old style IPC. * The @cmd value is turned from an encoding command and version into * just the command code. */ int ipc_parse_version (int *cmd) { if (*cmd & IPC_64) { *cmd ^= IPC_64; return IPC_64; } else { return IPC_OLD; } } #endif /* CONFIG_ARCH_WANT_IPC_PARSE_VERSION */ #ifdef CONFIG_PROC_FS struct ipc_proc_iter { struct ipc_namespace *ns; struct ipc_proc_iface *iface; }; /* * This routine locks the ipc structure found at least at position pos. */ static struct kern_ipc_perm *sysvipc_find_ipc(struct ipc_ids *ids, loff_t pos, loff_t *new_pos) { struct kern_ipc_perm *ipc; int total, id; total = 0; for (id = 0; id < pos && total < ids->in_use; id++) { ipc = idr_find(&ids->ipcs_idr, id); if (ipc != NULL) total++; } if (total >= ids->in_use) return NULL; for ( ; pos < IPCMNI; pos++) { ipc = idr_find(&ids->ipcs_idr, pos); if (ipc != NULL) { *new_pos = pos + 1; ipc_lock_by_ptr(ipc); return ipc; } } /* Out of range - return NULL to terminate iteration */ return NULL; } static void *sysvipc_proc_next(struct seq_file *s, void *it, loff_t *pos) { struct ipc_proc_iter *iter = s->private; struct ipc_proc_iface *iface = iter->iface; struct kern_ipc_perm *ipc = it; /* If we had an ipc id locked before, unlock it */ if (ipc && ipc != SEQ_START_TOKEN) ipc_unlock(ipc); return sysvipc_find_ipc(&iter->ns->ids[iface->ids], *pos, pos); } /* * File positions: pos 0 -> header, pos n -> ipc id = n - 1. * SeqFile iterator: iterator value locked ipc pointer or SEQ_TOKEN_START. */ static void *sysvipc_proc_start(struct seq_file *s, loff_t *pos) { struct ipc_proc_iter *iter = s->private; struct ipc_proc_iface *iface = iter->iface; struct ipc_ids *ids; ids = &iter->ns->ids[iface->ids]; /* * Take the lock - this will be released by the corresponding * call to stop(). */ down_read(&ids->rw_mutex); /* pos < 0 is invalid */ if (*pos < 0) return NULL; /* pos == 0 means header */ if (*pos == 0) return SEQ_START_TOKEN; /* Find the (pos-1)th ipc */ return sysvipc_find_ipc(ids, *pos - 1, pos); } static void sysvipc_proc_stop(struct seq_file *s, void *it) { struct kern_ipc_perm *ipc = it; struct ipc_proc_iter *iter = s->private; struct ipc_proc_iface *iface = iter->iface; struct ipc_ids *ids; /* If we had a locked structure, release it */ if (ipc && ipc != SEQ_START_TOKEN) ipc_unlock(ipc); ids = &iter->ns->ids[iface->ids]; /* Release the lock we took in start() */ up_read(&ids->rw_mutex); } static int sysvipc_proc_show(struct seq_file *s, void *it) { struct ipc_proc_iter *iter = s->private; struct ipc_proc_iface *iface = iter->iface; if (it == SEQ_START_TOKEN) return seq_puts(s, iface->header); return iface->show(s, it); } static const struct seq_operations sysvipc_proc_seqops = { .start = sysvipc_proc_start, .stop = sysvipc_proc_stop, .next = sysvipc_proc_next, .show = sysvipc_proc_show, }; static int sysvipc_proc_open(struct inode *inode, struct file *file) { int ret; struct seq_file *seq; struct ipc_proc_iter *iter; ret = -ENOMEM; iter = kmalloc(sizeof(*iter), GFP_KERNEL); if (!iter) goto out; ret = seq_open(file, &sysvipc_proc_seqops); if (ret) goto out_kfree; seq = file->private_data; seq->private = iter; iter->iface = PDE_DATA(inode); iter->ns = get_ipc_ns(current->nsproxy->ipc_ns); out: return ret; out_kfree: kfree(iter); goto out; } static int sysvipc_proc_release(struct inode *inode, struct file *file) { struct seq_file *seq = file->private_data; struct ipc_proc_iter *iter = seq->private; put_ipc_ns(iter->ns); return seq_release_private(inode, file); } static const struct file_operations sysvipc_proc_fops = { .open = sysvipc_proc_open, .read = seq_read, .llseek = seq_lseek, .release = sysvipc_proc_release, }; #endif /* CONFIG_PROC_FS */
generated by cgit 1.2.3-korg (git 2.39.0) at 2024-05-22 13:29:05 +0000