diff options
Diffstat (limited to 'features/aufs/aufs5-mmap-support.patch')
| -rw-r--r-- | features/aufs/aufs5-mmap-support.patch | 422 |
1 files changed, 0 insertions, 422 deletions
diff --git a/features/aufs/aufs5-mmap-support.patch b/features/aufs/aufs5-mmap-support.patch deleted file mode 100644 index 88cf25d1..00000000 --- a/features/aufs/aufs5-mmap-support.patch +++ /dev/null @@ -1,422 +0,0 @@ -From a2e902a4f19b3b5d3dfab511bdec517b2457ba9c Mon Sep 17 00:00:00 2001 -From: Bruce Ashfield <bruce.ashfield@gmail.com> -Date: Wed, 3 Jul 2019 10:55:03 -0400 -Subject: [PATCH] aufs5: mmap support - -Application of; aufs5-mmap.patch - -Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com> ---- - fs/proc/base.c | 2 +- - fs/proc/nommu.c | 5 ++- - fs/proc/task_mmu.c | 7 +++- - fs/proc/task_nommu.c | 5 ++- - include/linux/mm.h | 22 ++++++++++ - include/linux/mm_types.h | 2 + - kernel/fork.c | 2 +- - mm/Makefile | 2 +- - mm/filemap.c | 2 +- - mm/mmap.c | 33 +++++++++++---- - mm/nommu.c | 10 ++--- - mm/prfile.c | 86 ++++++++++++++++++++++++++++++++++++++++ - 12 files changed, 157 insertions(+), 21 deletions(-) - create mode 100644 mm/prfile.c - -diff --git a/fs/proc/base.c b/fs/proc/base.c -index ebea9501afb8..dc7edc5f7267 100644 ---- a/fs/proc/base.c -+++ b/fs/proc/base.c -@@ -2037,7 +2037,7 @@ static int map_files_get_link(struct dentry *dentry, struct path *path) - rc = -ENOENT; - vma = find_exact_vma(mm, vm_start, vm_end); - if (vma && vma->vm_file) { -- *path = vma->vm_file->f_path; -+ *path = vma_pr_or_file(vma)->f_path; - path_get(path); - rc = 0; - } -diff --git a/fs/proc/nommu.c b/fs/proc/nommu.c -index 14c2badb8fd9..65afe5287e43 100644 ---- a/fs/proc/nommu.c -+++ b/fs/proc/nommu.c -@@ -41,7 +41,10 @@ static int nommu_region_show(struct seq_file *m, struct vm_region *region) - file = region->vm_file; - - if (file) { -- struct inode *inode = file_inode(region->vm_file); -+ struct inode *inode; -+ -+ file = vmr_pr_or_file(region); -+ inode = file_inode(file); - dev = inode->i_sb->s_dev; - ino = inode->i_ino; - } -diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c -index 731642e0f5a0..e8d6259de65b 100644 ---- a/fs/proc/task_mmu.c -+++ b/fs/proc/task_mmu.c -@@ -309,7 +309,10 @@ show_map_vma(struct seq_file *m, struct vm_area_struct *vma) - const char *name = NULL; - - if (file) { -- struct inode *inode = file_inode(vma->vm_file); -+ struct inode *inode; -+ -+ file = vma_pr_or_file(vma); -+ inode = file_inode(file); - dev = inode->i_sb->s_dev; - ino = inode->i_ino; - pgoff = ((loff_t)vma->vm_pgoff) << PAGE_SHIFT; -@@ -1807,7 +1810,7 @@ static int show_numa_map(struct seq_file *m, void *v) - struct proc_maps_private *proc_priv = &numa_priv->proc_maps; - struct vm_area_struct *vma = v; - struct numa_maps *md = &numa_priv->md; -- struct file *file = vma->vm_file; -+ struct file *file = vma_pr_or_file(vma); - struct mm_struct *mm = vma->vm_mm; - struct mm_walk walk = { - .hugetlb_entry = gather_hugetlb_stats, -diff --git a/fs/proc/task_nommu.c b/fs/proc/task_nommu.c -index 7907e6419e57..d17209cf52bc 100644 ---- a/fs/proc/task_nommu.c -+++ b/fs/proc/task_nommu.c -@@ -155,7 +155,10 @@ static int nommu_vma_show(struct seq_file *m, struct vm_area_struct *vma) - file = vma->vm_file; - - if (file) { -- struct inode *inode = file_inode(vma->vm_file); -+ struct inode *inode; -+ -+ file = vma_pr_or_file(vma); -+ inode = file_inode(file); - dev = inode->i_sb->s_dev; - ino = inode->i_ino; - pgoff = (loff_t)vma->vm_pgoff << PAGE_SHIFT; -diff --git a/include/linux/mm.h b/include/linux/mm.h -index 0334ca97c584..3bdae823daee 100644 ---- a/include/linux/mm.h -+++ b/include/linux/mm.h -@@ -1538,6 +1538,28 @@ static inline void unmap_shared_mapping_range(struct address_space *mapping, - unmap_mapping_range(mapping, holebegin, holelen, 0); - } - -+extern void vma_do_file_update_time(struct vm_area_struct *, const char[], int); -+extern struct file *vma_do_pr_or_file(struct vm_area_struct *, const char[], -+ int); -+extern void vma_do_get_file(struct vm_area_struct *, const char[], int); -+extern void vma_do_fput(struct vm_area_struct *, const char[], int); -+ -+#define vma_file_update_time(vma) vma_do_file_update_time(vma, __func__, \ -+ __LINE__) -+#define vma_pr_or_file(vma) vma_do_pr_or_file(vma, __func__, \ -+ __LINE__) -+#define vma_get_file(vma) vma_do_get_file(vma, __func__, __LINE__) -+#define vma_fput(vma) vma_do_fput(vma, __func__, __LINE__) -+ -+#ifndef CONFIG_MMU -+extern struct file *vmr_do_pr_or_file(struct vm_region *, const char[], int); -+extern void vmr_do_fput(struct vm_region *, const char[], int); -+ -+#define vmr_pr_or_file(region) vmr_do_pr_or_file(region, __func__, \ -+ __LINE__) -+#define vmr_fput(region) vmr_do_fput(region, __func__, __LINE__) -+#endif /* !CONFIG_MMU */ -+ - extern int access_process_vm(struct task_struct *tsk, unsigned long addr, - void *buf, int len, unsigned int gup_flags); - extern int access_remote_vm(struct mm_struct *mm, unsigned long addr, -diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h -index 3a37a89eb7a7..cb5e5ebe4dcf 100644 ---- a/include/linux/mm_types.h -+++ b/include/linux/mm_types.h -@@ -253,6 +253,7 @@ struct vm_region { - unsigned long vm_top; /* region allocated to here */ - unsigned long vm_pgoff; /* the offset in vm_file corresponding to vm_start */ - struct file *vm_file; /* the backing file or NULL */ -+ struct file *vm_prfile; /* the virtual backing file or NULL */ - - int vm_usage; /* region usage count (access under nommu_region_sem) */ - bool vm_icache_flushed : 1; /* true if the icache has been flushed for -@@ -327,6 +328,7 @@ struct vm_area_struct { - unsigned long vm_pgoff; /* Offset (within vm_file) in PAGE_SIZE - units */ - struct file * vm_file; /* File we map to (can be NULL). */ -+ struct file *vm_prfile; /* shadow of vm_file */ - void * vm_private_data; /* was vm_pte (shared mem) */ - - #ifdef CONFIG_SWAP -diff --git a/kernel/fork.c b/kernel/fork.c -index d8ae0f1b4148..1ce91c08a2b0 100644 ---- a/kernel/fork.c -+++ b/kernel/fork.c -@@ -553,7 +553,7 @@ static __latent_entropy int dup_mmap(struct mm_struct *mm, - struct inode *inode = file_inode(file); - struct address_space *mapping = file->f_mapping; - -- get_file(file); -+ vma_get_file(tmp); - if (tmp->vm_flags & VM_DENYWRITE) - atomic_dec(&inode->i_writecount); - i_mmap_lock_write(mapping); -diff --git a/mm/Makefile b/mm/Makefile -index 338e528ad436..ee91e8c78606 100644 ---- a/mm/Makefile -+++ b/mm/Makefile -@@ -39,7 +39,7 @@ obj-y := filemap.o mempool.o oom_kill.o fadvise.o \ - mm_init.o mmu_context.o percpu.o slab_common.o \ - compaction.o vmacache.o \ - interval_tree.o list_lru.o workingset.o \ -- debug.o gup.o $(mmu-y) -+ prfile.o debug.o gup.o $(mmu-y) - - # Give 'page_alloc' its own module-parameter namespace - page-alloc-y := page_alloc.o -diff --git a/mm/filemap.c b/mm/filemap.c -index d0cf700bf201..5cac93e7bf67 100644 ---- a/mm/filemap.c -+++ b/mm/filemap.c -@@ -2721,7 +2721,7 @@ vm_fault_t filemap_page_mkwrite(struct vm_fault *vmf) - vm_fault_t ret = VM_FAULT_LOCKED; - - sb_start_pagefault(inode->i_sb); -- file_update_time(vmf->vma->vm_file); -+ vma_file_update_time(vmf->vma); - lock_page(page); - if (page->mapping != inode->i_mapping) { - unlock_page(page); -diff --git a/mm/mmap.c b/mm/mmap.c -index 7e8c3e8ae75f..d8a903f61262 100644 ---- a/mm/mmap.c -+++ b/mm/mmap.c -@@ -182,7 +182,7 @@ static struct vm_area_struct *remove_vma(struct vm_area_struct *vma) - if (vma->vm_ops && vma->vm_ops->close) - vma->vm_ops->close(vma); - if (vma->vm_file) -- fput(vma->vm_file); -+ vma_fput(vma); - mpol_put(vma_policy(vma)); - vm_area_free(vma); - return next; -@@ -931,7 +931,7 @@ int __vma_adjust(struct vm_area_struct *vma, unsigned long start, - if (remove_next) { - if (file) { - uprobe_munmap(next, next->vm_start, next->vm_end); -- fput(file); -+ vma_fput(vma); - } - if (next->anon_vma) - anon_vma_merge(vma, next); -@@ -1847,8 +1847,8 @@ unsigned long mmap_region(struct file *file, unsigned long addr, - return addr; - - unmap_and_free_vma: -+ vma_fput(vma); - vma->vm_file = NULL; -- fput(file); - - /* Undo any partial mapping done by a device driver. */ - unmap_region(mm, vma, prev, vma->vm_start, vma->vm_end); -@@ -2680,7 +2680,7 @@ int __split_vma(struct mm_struct *mm, struct vm_area_struct *vma, - goto out_free_mpol; - - if (new->vm_file) -- get_file(new->vm_file); -+ vma_get_file(new); - - if (new->vm_ops && new->vm_ops->open) - new->vm_ops->open(new); -@@ -2699,7 +2699,7 @@ int __split_vma(struct mm_struct *mm, struct vm_area_struct *vma, - if (new->vm_ops && new->vm_ops->close) - new->vm_ops->close(new); - if (new->vm_file) -- fput(new->vm_file); -+ vma_fput(new); - unlink_anon_vmas(new); - out_free_mpol: - mpol_put(vma_policy(new)); -@@ -2890,7 +2890,7 @@ SYSCALL_DEFINE5(remap_file_pages, unsigned long, start, unsigned long, size, - struct vm_area_struct *vma; - unsigned long populate = 0; - unsigned long ret = -EINVAL; -- struct file *file; -+ struct file *file, *prfile; - - pr_warn_once("%s (%d) uses deprecated remap_file_pages() syscall. See Documentation/vm/remap_file_pages.rst.\n", - current->comm, current->pid); -@@ -2965,10 +2965,27 @@ SYSCALL_DEFINE5(remap_file_pages, unsigned long, start, unsigned long, size, - } - } - -- file = get_file(vma->vm_file); -+ vma_get_file(vma); -+ file = vma->vm_file; -+ prfile = vma->vm_prfile; - ret = do_mmap_pgoff(vma->vm_file, start, size, - prot, flags, pgoff, &populate, NULL); -+ if (!IS_ERR_VALUE(ret) && file && prfile) { -+ struct vm_area_struct *new_vma; -+ -+ new_vma = find_vma(mm, ret); -+ if (!new_vma->vm_prfile) -+ new_vma->vm_prfile = prfile; -+ if (new_vma != vma) -+ get_file(prfile); -+ } -+ /* -+ * two fput()s instead of vma_fput(vma), -+ * coz vma may not be available anymore. -+ */ - fput(file); -+ if (prfile) -+ fput(prfile); - out: - up_write(&mm->mmap_sem); - if (populate) -@@ -3258,7 +3275,7 @@ struct vm_area_struct *copy_vma(struct vm_area_struct **vmap, - if (anon_vma_clone(new_vma, vma)) - goto out_free_mempol; - if (new_vma->vm_file) -- get_file(new_vma->vm_file); -+ vma_get_file(new_vma); - if (new_vma->vm_ops && new_vma->vm_ops->open) - new_vma->vm_ops->open(new_vma); - vma_link(mm, new_vma, prev, rb_link, rb_parent); -diff --git a/mm/nommu.c b/mm/nommu.c -index fed1b6e9c89b..0d43b248ed54 100644 ---- a/mm/nommu.c -+++ b/mm/nommu.c -@@ -552,7 +552,7 @@ static void __put_nommu_region(struct vm_region *region) - up_write(&nommu_region_sem); - - if (region->vm_file) -- fput(region->vm_file); -+ vmr_fput(region); - - /* IO memory and memory shared directly out of the pagecache - * from ramfs/tmpfs mustn't be released here */ -@@ -690,7 +690,7 @@ static void delete_vma(struct mm_struct *mm, struct vm_area_struct *vma) - if (vma->vm_ops && vma->vm_ops->close) - vma->vm_ops->close(vma); - if (vma->vm_file) -- fput(vma->vm_file); -+ vma_fput(vma); - put_nommu_region(vma->vm_region); - vm_area_free(vma); - } -@@ -1213,7 +1213,7 @@ unsigned long do_mmap(struct file *file, - goto error_just_free; - } - } -- fput(region->vm_file); -+ vmr_fput(region); - kmem_cache_free(vm_region_jar, region); - region = pregion; - result = start; -@@ -1290,10 +1290,10 @@ unsigned long do_mmap(struct file *file, - up_write(&nommu_region_sem); - error: - if (region->vm_file) -- fput(region->vm_file); -+ vmr_fput(region); - kmem_cache_free(vm_region_jar, region); - if (vma->vm_file) -- fput(vma->vm_file); -+ vma_fput(vma); - vm_area_free(vma); - return ret; - -diff --git a/mm/prfile.c b/mm/prfile.c -new file mode 100644 -index 000000000000..024cdcfae1b1 ---- /dev/null -+++ b/mm/prfile.c -@@ -0,0 +1,86 @@ -+// SPDX-License-Identifier: GPL-2.0 -+/* -+ * Mainly for aufs which mmap(2) different file and wants to print different -+ * path in /proc/PID/maps. -+ * Call these functions via macros defined in linux/mm.h. -+ * -+ * See Documentation/filesystems/aufs/design/06mmap.txt -+ * -+ * Copyright (c) 2014-2019 Junjro R. Okajima -+ * Copyright (c) 2014 Ian Campbell -+ */ -+ -+#include <linux/mm.h> -+#include <linux/file.h> -+#include <linux/fs.h> -+ -+/* #define PRFILE_TRACE */ -+static inline void prfile_trace(struct file *f, struct file *pr, -+ const char func[], int line, const char func2[]) -+{ -+#ifdef PRFILE_TRACE -+ if (pr) -+ pr_info("%s:%d: %s, %pD2\n", func, line, func2, f); -+#endif -+} -+ -+void vma_do_file_update_time(struct vm_area_struct *vma, const char func[], -+ int line) -+{ -+ struct file *f = vma->vm_file, *pr = vma->vm_prfile; -+ -+ prfile_trace(f, pr, func, line, __func__); -+ file_update_time(f); -+ if (f && pr) -+ file_update_time(pr); -+} -+ -+struct file *vma_do_pr_or_file(struct vm_area_struct *vma, const char func[], -+ int line) -+{ -+ struct file *f = vma->vm_file, *pr = vma->vm_prfile; -+ -+ prfile_trace(f, pr, func, line, __func__); -+ return (f && pr) ? pr : f; -+} -+ -+void vma_do_get_file(struct vm_area_struct *vma, const char func[], int line) -+{ -+ struct file *f = vma->vm_file, *pr = vma->vm_prfile; -+ -+ prfile_trace(f, pr, func, line, __func__); -+ get_file(f); -+ if (f && pr) -+ get_file(pr); -+} -+ -+void vma_do_fput(struct vm_area_struct *vma, const char func[], int line) -+{ -+ struct file *f = vma->vm_file, *pr = vma->vm_prfile; -+ -+ prfile_trace(f, pr, func, line, __func__); -+ fput(f); -+ if (f && pr) -+ fput(pr); -+} -+ -+#ifndef CONFIG_MMU -+struct file *vmr_do_pr_or_file(struct vm_region *region, const char func[], -+ int line) -+{ -+ struct file *f = region->vm_file, *pr = region->vm_prfile; -+ -+ prfile_trace(f, pr, func, line, __func__); -+ return (f && pr) ? pr : f; -+} -+ -+void vmr_do_fput(struct vm_region *region, const char func[], int line) -+{ -+ struct file *f = region->vm_file, *pr = region->vm_prfile; -+ -+ prfile_trace(f, pr, func, line, __func__); -+ fput(f); -+ if (f && pr) -+ fput(pr); -+} -+#endif /* !CONFIG_MMU */ --- -2.19.1 - |