SPDX-License-Identifier: GPL-2.0
-aufs5.x-rcN kbuild patch
+aufs5.12 kbuild patch
diff --git a/fs/Kconfig b/fs/Kconfig
-index bfb1c6095c7a..bddba5bb307e 100644
+index a55bda4233bbe..c4984b5bf340f 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
-@@ -261,6 +261,7 @@ source "fs/romfs/Kconfig"
- source "fs/pstore/Kconfig"
- source "fs/sysv/Kconfig"
+@@ -288,6 +288,7 @@ source "fs/sysv/Kconfig"
source "fs/ufs/Kconfig"
+ source "fs/erofs/Kconfig"
+ source "fs/vboxsf/Kconfig"
+source "fs/aufs/Kconfig"
endif # MISC_FILESYSTEMS
diff --git a/fs/Makefile b/fs/Makefile
-index d60089fd689b..924c16a40b00 100644
+index 3215fe205256d..7218277473b8f 100644
--- a/fs/Makefile
+++ b/fs/Makefile
-@@ -130,3 +130,4 @@ obj-$(CONFIG_F2FS_FS) += f2fs/
- obj-$(CONFIG_CEPH_FS) += ceph/
- obj-$(CONFIG_PSTORE) += pstore/
- obj-$(CONFIG_EFIVAR_FS) += efivarfs/
+@@ -135,3 +135,4 @@ obj-$(CONFIG_EFIVAR_FS) += efivarfs/
+ obj-$(CONFIG_EROFS_FS) += erofs/
+ obj-$(CONFIG_VBOXSF_FS) += vboxsf/
+ obj-$(CONFIG_ZONEFS_FS) += zonefs/
+obj-$(CONFIG_AUFS_FS) += aufs/
SPDX-License-Identifier: GPL-2.0
-aufs5.x-rcN base patch
+aufs5.12 base patch
diff --git a/MAINTAINERS b/MAINTAINERS
-index 9cbcf167bdd0..5a9cee826a8f 100644
+index 9450e052f1b13..f7db6edba5a37 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
-@@ -2822,6 +2822,19 @@ F: include/linux/audit.h
+@@ -2992,6 +2992,19 @@ F: include/linux/audit.h
F: include/uapi/linux/audit.h
F: kernel/audit*
+M: "J. R. Okajima" <hooanon05g@gmail.com>
+L: aufs-users@lists.sourceforge.net (members only)
+L: linux-unionfs@vger.kernel.org
++S: Supported
+W: http://aufs.sourceforge.net
+T: git://github.com/sfjro/aufs4-linux.git
-+S: Supported
-+F: Documentation/filesystems/aufs/
+F: Documentation/ABI/testing/debugfs-aufs
+F: Documentation/ABI/testing/sysfs-aufs
++F: Documentation/filesystems/aufs/
+F: fs/aufs/
+F: include/uapi/linux/aufs_type.h
+
AUXILIARY DISPLAY DRIVERS
- M: Miguel Ojeda Sandonis <miguel.ojeda.sandonis@gmail.com>
+ M: Miguel Ojeda <ojeda@kernel.org>
S: Maintained
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
-index ab7ca5989097..80d06084b043 100644
+index a370cde3ddd49..01ca256575fb2 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
-@@ -738,6 +738,24 @@ static int loop_change_fd(struct loop_device *lo, struct block_device *bdev,
+@@ -761,6 +761,24 @@ static int loop_change_fd(struct loop_device *lo, struct block_device *bdev,
return error;
}
static ssize_t loop_attr_show(struct device *dev, char *page,
diff --git a/fs/dcache.c b/fs/dcache.c
-index e88cf0554e65..7ce4ccf5a51c 100644
+index 7d24ff7eb2068..3caa7ab4b84f1 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
-@@ -1264,7 +1264,7 @@ enum d_walk_ret {
+@@ -1318,7 +1318,7 @@ enum d_walk_ret {
*
* The @enter() callbacks are called with d_lock held.
*/
{
struct dentry *this_parent;
diff --git a/fs/fcntl.c b/fs/fcntl.c
-index 3d40771e8e7c..d62303c5472a 100644
+index dfc72f15be7fc..d8a12eb63961d 100644
--- a/fs/fcntl.c
+++ b/fs/fcntl.c
-@@ -32,7 +32,7 @@
+@@ -33,7 +33,7 @@
#define SETFL_MASK (O_APPEND | O_NONBLOCK | O_NDELAY | O_DIRECT | O_NOATIME)
-static int setfl(int fd, struct file * filp, unsigned long arg)
-+int setfl(int fd, struct file * filp, unsigned long arg)
++int setfl(int fd, struct file *filp, unsigned long arg)
{
struct inode * inode = file_inode(filp);
int error = 0;
-@@ -63,6 +63,8 @@ static int setfl(int fd, struct file * filp, unsigned long arg)
+@@ -64,6 +64,8 @@ static int setfl(int fd, struct file * filp, unsigned long arg)
if (filp->f_op->check_flags)
error = filp->f_op->check_flags(arg);
return error;
diff --git a/fs/inode.c b/fs/inode.c
-index 0f1e3b563c47..43df8452f97d 100644
+index a047ab306f9a8..ba1df0895b69f 100644
--- a/fs/inode.c
+++ b/fs/inode.c
-@@ -1670,7 +1670,7 @@ EXPORT_SYMBOL(generic_update_time);
+@@ -1772,7 +1772,7 @@ EXPORT_SYMBOL(generic_update_time);
* This does the actual work of updating an inodes time or version. Must have
* had called mnt_want_write() before calling this.
*/
-static int update_time(struct inode *inode, struct timespec64 *time, int flags)
+int update_time(struct inode *inode, struct timespec64 *time, int flags)
{
- int (*update_time)(struct inode *, struct timespec64 *, int);
-
+ if (inode->i_op->update_time)
+ return inode->i_op->update_time(inode, time, flags);
diff --git a/fs/namespace.c b/fs/namespace.c
-index d28d30b13043..34c8093ddb1d 100644
+index 56bb5a5fdc0d0..540679d7e0434 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
-@@ -776,6 +776,12 @@ static inline int check_mnt(struct mount *mnt)
+@@ -807,6 +807,12 @@ static inline int check_mnt(struct mount *mnt)
return mnt->mnt_ns == current->nsproxy->mnt_ns;
}
/*
* vfsmount lock must be held for write
*/
-diff --git a/fs/read_write.c b/fs/read_write.c
-index 5bbf587f5bc1..3265bb84f152 100644
---- a/fs/read_write.c
-+++ b/fs/read_write.c
-@@ -498,6 +498,28 @@ static ssize_t __vfs_write(struct file *file, const char __user *p,
- return -EINVAL;
- }
-
-+vfs_readf_t vfs_readf(struct file *file)
-+{
-+ const struct file_operations *fop = file->f_op;
-+
-+ if (fop->read)
-+ return fop->read;
-+ if (fop->read_iter)
-+ return new_sync_read;
-+ return ERR_PTR(-ENOSYS);
-+}
-+
-+vfs_writef_t vfs_writef(struct file *file)
-+{
-+ const struct file_operations *fop = file->f_op;
-+
-+ if (fop->write)
-+ return fop->write;
-+ if (fop->write_iter)
-+ return new_sync_write;
-+ return ERR_PTR(-ENOSYS);
-+}
-+
- ssize_t __kernel_write(struct file *file, const void *buf, size_t count, loff_t *pos)
- {
- mm_segment_t old_fs;
diff --git a/fs/splice.c b/fs/splice.c
-index 98412721f056..75b489fcb66f 100644
+index 5dbce4dcc1a7d..3e6ba363b7775 100644
--- a/fs/splice.c
+++ b/fs/splice.c
-@@ -834,8 +834,8 @@ EXPORT_SYMBOL(generic_splice_sendpage);
+@@ -759,8 +759,8 @@ static int warn_unsupported(struct file *file, const char *op)
/*
* Attempt to initiate a splice from pipe to file.
*/
+long do_splice_from(struct pipe_inode_info *pipe, struct file *out,
+ loff_t *ppos, size_t len, unsigned int flags)
{
- ssize_t (*splice_write)(struct pipe_inode_info *, struct file *,
- loff_t *, size_t, unsigned int);
-@@ -851,9 +851,9 @@ static long do_splice_from(struct pipe_inode_info *pipe, struct file *out,
+ if (unlikely(!out->f_op->splice_write))
+ return warn_unsupported(out, "write");
+@@ -770,9 +770,9 @@ static long do_splice_from(struct pipe_inode_info *pipe, struct file *out,
/*
* Attempt to initiate a splice from a file to a pipe.
*/
+ struct pipe_inode_info *pipe, size_t len,
+ unsigned int flags)
{
- ssize_t (*splice_read)(struct file *, loff_t *,
- struct pipe_inode_info *, size_t, unsigned int);
+ unsigned int p_space;
+ int ret;
diff --git a/fs/sync.c b/fs/sync.c
-index 4d1ff010bc5a..457f4e4a5cc1 100644
+index 1373a610dc784..b7b5a0a0df6ff 100644
--- a/fs/sync.c
+++ b/fs/sync.c
@@ -28,7 +28,7 @@
if (wait)
sync_inodes_sb(sb);
diff --git a/include/linux/fs.h b/include/linux/fs.h
-index 997a530ff4e9..3dbec51c2037 100644
+index ec8f3ddf4a6aa..4fa4b24535fde 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
-@@ -1331,6 +1331,7 @@ extern void fasync_free(struct fasync_struct *);
+@@ -1332,6 +1332,7 @@ extern void fasync_free(struct fasync_struct *);
/* can be called from interrupts */
extern void kill_fasync(struct fasync_struct **, int, int);
-+extern int setfl(int fd, struct file * filp, unsigned long arg);
++extern int setfl(int fd, struct file *filp, unsigned long arg);
extern void __f_setown(struct file *filp, struct pid *, enum pid_type, int force);
extern int f_setown(struct file *filp, unsigned long arg, int force);
extern void f_delown(struct file *filp);
-@@ -1810,6 +1811,7 @@ struct file_operations {
+@@ -1909,6 +1910,7 @@ struct file_operations {
ssize_t (*sendpage) (struct file *, struct page *, int, size_t, loff_t *, int);
unsigned long (*get_unmapped_area)(struct file *, unsigned long, unsigned long, unsigned long, unsigned long);
int (*check_flags)(int);
int (*flock) (struct file *, int, struct file_lock *);
ssize_t (*splice_write)(struct pipe_inode_info *, struct file *, loff_t *, size_t, unsigned int);
ssize_t (*splice_read)(struct file *, loff_t *, struct pipe_inode_info *, size_t, unsigned int);
-@@ -1880,6 +1882,12 @@ ssize_t rw_copy_check_uvector(int type, const struct iovec __user * uvector,
- struct iovec *fast_pointer,
- struct iovec **ret_pointer);
-
-+typedef ssize_t (*vfs_readf_t)(struct file *, char __user *, size_t, loff_t *);
-+typedef ssize_t (*vfs_writef_t)(struct file *, const char __user *, size_t,
-+ loff_t *);
-+vfs_readf_t vfs_readf(struct file *file);
-+vfs_writef_t vfs_writef(struct file *file);
-+
- extern ssize_t __vfs_read(struct file *, char __user *, size_t, loff_t *);
- extern ssize_t vfs_read(struct file *, char __user *, size_t, loff_t *);
- extern ssize_t vfs_write(struct file *, const char __user *, size_t, loff_t *);
-@@ -2298,6 +2306,7 @@ extern int current_umask(void);
+@@ -2428,6 +2430,7 @@ extern int current_umask(void);
extern void ihold(struct inode * inode);
extern void iput(struct inode *);
extern int generic_update_time(struct inode *, struct timespec64 *, int);
/* /sys/fs */
extern struct kobject *fs_kobj;
-@@ -2586,6 +2595,7 @@ static inline bool sb_is_blkdev_sb(struct super_block *sb)
- return false;
+@@ -2668,6 +2671,7 @@ static inline bool sb_is_blkdev_sb(struct super_block *sb)
}
- #endif
+
+ void emergency_thaw_all(void);
+extern int __sync_filesystem(struct super_block *, int);
extern int sync_filesystem(struct super_block *);
extern const struct file_operations def_blk_fops;
extern const struct file_operations def_chr_fops;
diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h
-index 0b0d7259276d..12d18e180348 100644
+index 7b7ebf2e28ec5..20c46305e057e 100644
--- a/include/linux/lockdep.h
+++ b/include/linux/lockdep.h
-@@ -334,6 +334,8 @@ static inline int lockdep_match_key(struct lockdep_map *lock,
+@@ -248,6 +248,8 @@ static inline int lockdep_match_key(struct lockdep_map *lock,
return lock->key == key;
}
/*
* Acquire a lock.
*
-@@ -476,6 +478,7 @@ struct lockdep_map { };
-
- #define lockdep_depth(tsk) (0)
-
-+#define lockdep_is_held(lock) (1)
- #define lockdep_is_held_type(l, r) (1)
-
- #define lockdep_assert_held(l) do { (void)(l); } while (0)
diff --git a/include/linux/mnt_namespace.h b/include/linux/mnt_namespace.h
-index 35942084cd40..24f5fd1a789d 100644
+index 8f882f5881e87..6b9808f098435 100644
--- a/include/linux/mnt_namespace.h
+++ b/include/linux/mnt_namespace.h
-@@ -6,11 +6,14 @@
- struct mnt_namespace;
+@@ -7,12 +7,15 @@ struct mnt_namespace;
struct fs_struct;
struct user_namespace;
+ struct ns_common;
+struct vfsmount;
extern struct mnt_namespace *copy_mnt_ns(unsigned long, struct mnt_namespace *,
struct user_namespace *, struct fs_struct *);
extern void put_mnt_ns(struct mnt_namespace *ns);
+ extern struct ns_common *from_mnt_ns(struct mnt_namespace *);
+extern int is_current_mnt_ns(struct vfsmount *mnt);
+
extern const struct file_operations proc_mountinfo_operations;
extern const struct file_operations proc_mountstats_operations;
diff --git a/include/linux/splice.h b/include/linux/splice.h
-index 74b4911ac16d..19789fbea567 100644
+index a55179fd60fc3..8e21c53cf8831 100644
--- a/include/linux/splice.h
+++ b/include/linux/splice.h
-@@ -87,4 +87,10 @@ extern void splice_shrink_spd(struct splice_pipe_desc *);
+@@ -93,4 +93,10 @@ extern void splice_shrink_spd(struct splice_pipe_desc *);
extern const struct pipe_buf_operations page_cache_pipe_buf_ops;
extern const struct pipe_buf_operations default_pipe_buf_ops;
+ unsigned int flags);
#endif
diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c
-index 4861cf8e274b..ec87ccf82025 100644
+index f160f1c97ca1e..fe71c2737eb9e 100644
--- a/kernel/locking/lockdep.c
+++ b/kernel/locking/lockdep.c
-@@ -153,7 +153,7 @@ static
+@@ -188,7 +188,7 @@ static
struct lock_class lock_classes[MAX_LOCKDEP_KEYS];
static DECLARE_BITMAP(lock_classes_in_use, MAX_LOCKDEP_KEYS);
{
unsigned int class_idx = hlock->class_idx;
-@@ -174,6 +174,7 @@ static inline struct lock_class *hlock_class(struct held_lock *hlock)
+@@ -209,6 +209,7 @@ static inline struct lock_class *hlock_class(struct held_lock *hlock)
*/
return lock_classes + class_idx;
}
#ifdef CONFIG_LOCK_STAT
static DEFINE_PER_CPU(struct lock_class_stats[MAX_LOCKDEP_KEYS], cpu_lock_stats);
SPDX-License-Identifier: GPL-2.0
-aufs5.x-rcN mmap patch
+aufs5.12 mmap patch
diff --git a/fs/proc/base.c b/fs/proc/base.c
-index ebea9501afb8..dc7edc5f7267 100644
+index 3851bfcdba56e..d632ddd5f5ee8 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)
+@@ -2183,7 +2183,7 @@ 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) {
rc = 0;
}
diff --git a/fs/proc/nommu.c b/fs/proc/nommu.c
-index 14c2badb8fd9..65afe5287e43 100644
+index 13452b32e2bd5..38acccfef9d49 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)
+@@ -40,7 +40,10 @@ static int nommu_region_show(struct seq_file *m, struct vm_region *region)
file = region->vm_file;
if (file) {
ino = inode->i_ino;
}
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
-index 731642e0f5a0..e8d6259de65b 100644
+index e862cab695838..5c45041943a6f 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)
+@@ -280,7 +280,10 @@ show_map_vma(struct seq_file *m, struct vm_area_struct *vma)
const char *name = NULL;
if (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)
+@@ -1861,7 +1864,7 @@ 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,
+ struct mempolicy *pol;
+ char buffer[64];
diff --git a/fs/proc/task_nommu.c b/fs/proc/task_nommu.c
-index 7907e6419e57..d17209cf52bc 100644
+index a6d21fc0033c6..02c2de31196e0 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)
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
+index 8ba434287387b..6d23d40ad1523 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,
+@@ -1759,6 +1759,28 @@ static inline void unmap_shared_mapping_range(struct address_space *mapping,
unmap_mapping_range(mapping, holebegin, holelen, 0);
}
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 6a7a1083b6fb..461db8843e32 100644
+index 6613b26a88946..e94df45b5483a 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
-@@ -262,6 +262,7 @@ struct vm_region {
+@@ -279,6 +279,7 @@ 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 */
int vm_usage; /* region usage count (access under nommu_region_sem) */
bool vm_icache_flushed : 1; /* true if the icache has been flushed for
-@@ -336,6 +337,7 @@ struct vm_area_struct {
+@@ -358,6 +359,7 @@ 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). */
#ifdef CONFIG_SWAP
diff --git a/kernel/fork.c b/kernel/fork.c
-index 2852d0e76ea3..7b7f676b6465 100644
+index 426cd0c51f9eb..ea0ae494c6dde 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
-@@ -553,7 +553,7 @@ static __latent_entropy int dup_mmap(struct mm_struct *mm,
+@@ -555,7 +555,7 @@ 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);
+ put_write_access(inode);
i_mmap_lock_write(mapping);
diff --git a/mm/Makefile b/mm/Makefile
-index d0b295c3b764..6156cd3d1ab0 100644
+index 72227b24a6168..5d03943b08e03 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 \
+@@ -52,7 +52,7 @@ obj-y := filemap.o mempool.o oom_kill.o fadvise.o \
+ mm_init.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)
+- debug.o gup.o mmap_lock.o $(mmu-y)
++ prfile.o debug.o gup.o mmap_lock.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
+index 6ce832dc59e73..8b7a71b6f0e6c 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
-@@ -2721,7 +2721,7 @@ vm_fault_t filemap_page_mkwrite(struct vm_fault *vmf)
+@@ -3162,7 +3162,7 @@ vm_fault_t filemap_page_mkwrite(struct vm_fault *vmf)
vm_fault_t ret = VM_FAULT_LOCKED;
- sb_start_pagefault(inode->i_sb);
+ sb_start_pagefault(mapping->host->i_sb);
- file_update_time(vmf->vma->vm_file);
+ vma_file_update_time(vmf->vma);
lock_page(page);
- if (page->mapping != inode->i_mapping) {
+ if (page->mapping != mapping) {
unlock_page(page);
diff --git a/mm/mmap.c b/mm/mmap.c
-index 7e8c3e8ae75f..d8a903f61262 100644
+index 3f287599a7a30..eb36f1b18f048 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)
+@@ -179,7 +179,7 @@ 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)
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,
+@@ -949,7 +949,7 @@ 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);
}
if (next->anon_vma)
anon_vma_merge(vma, next);
-@@ -1847,8 +1847,8 @@ unsigned long mmap_region(struct file *file, unsigned long addr,
+@@ -1895,7 +1895,7 @@ unsigned long mmap_region(struct file *file, unsigned long addr,
return addr;
unmap_and_free_vma:
+- fput(vma->vm_file);
+ 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,
+@@ -2755,7 +2755,7 @@ int __split_vma(struct mm_struct *mm, struct vm_area_struct *vma,
goto out_free_mpol;
if (new->vm_file)
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,
+@@ -2774,7 +2774,7 @@ 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)
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,
+@@ -2967,7 +2967,7 @@ SYSCALL_DEFINE5(remap_file_pages, unsigned long, start, unsigned long, size,
struct vm_area_struct *vma;
unsigned long populate = 0;
unsigned long ret = -EINVAL;
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,
+@@ -3042,10 +3042,27 @@ SYSCALL_DEFINE5(remap_file_pages, unsigned long, start, unsigned long, size,
}
}
+ vma_get_file(vma);
+ file = vma->vm_file;
+ prfile = vma->vm_prfile;
- ret = do_mmap_pgoff(vma->vm_file, start, size,
+ ret = do_mmap(vma->vm_file, start, size,
prot, flags, pgoff, &populate, NULL);
+ if (!IS_ERR_VALUE(ret) && file && prfile) {
+ struct vm_area_struct *new_vma;
+ if (prfile)
+ fput(prfile);
out:
- up_write(&mm->mmap_sem);
+ mmap_write_unlock(mm);
if (populate)
-@@ -3258,7 +3275,7 @@ struct vm_area_struct *copy_vma(struct vm_area_struct **vmap,
+@@ -3332,7 +3349,7 @@ 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)
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
+index 5c9ab799c0e63..dd78905704c12 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
-@@ -552,7 +552,7 @@ static void __put_nommu_region(struct vm_region *region)
+@@ -533,7 +533,7 @@ static void __put_nommu_region(struct vm_region *region)
up_write(&nommu_region_sem);
if (region->vm_file)
/* 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)
+@@ -665,7 +665,7 @@ 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)
put_nommu_region(vma->vm_region);
vm_area_free(vma);
}
-@@ -1213,7 +1213,7 @@ unsigned long do_mmap(struct file *file,
+@@ -1188,7 +1188,7 @@ unsigned long do_mmap(struct file *file,
goto error_just_free;
}
}
kmem_cache_free(vm_region_jar, region);
region = pregion;
result = start;
-@@ -1290,10 +1290,10 @@ unsigned long do_mmap(struct file *file,
+@@ -1265,10 +1265,10 @@ unsigned long do_mmap(struct file *file,
up_write(&nommu_region_sem);
error:
if (region->vm_file)
diff --git a/mm/prfile.c b/mm/prfile.c
new file mode 100644
-index 000000000000..024cdcfae1b1
+index 0000000000000..00d51187c3250
--- /dev/null
+++ b/mm/prfile.c
@@ -0,0 +1,86 @@
+ *
+ * See Documentation/filesystems/aufs/design/06mmap.txt
+ *
-+ * Copyright (c) 2014-2019 Junjro R. Okajima
++ * Copyright (c) 2014-2020 Junjro R. Okajima
+ * Copyright (c) 2014 Ian Campbell
+ */
+
+}
+#endif /* !CONFIG_MMU */
SPDX-License-Identifier: GPL-2.0
-aufs5.x-rcN standalone patch
+aufs5.12 standalone patch
diff --git a/fs/dcache.c b/fs/dcache.c
-index 7ce4ccf5a51c..00d7e6a08026 100644
+index 3caa7ab4b84f1..00e97c9ae7c45 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
-@@ -1369,6 +1369,7 @@ void d_walk(struct dentry *parent, void *data,
+@@ -1423,6 +1423,7 @@ void d_walk(struct dentry *parent, void *data,
seq = 1;
goto again;
}
struct check_mount {
struct vfsmount *mnt;
-@@ -2914,6 +2915,7 @@ void d_exchange(struct dentry *dentry1, struct dentry *dentry2)
+@@ -2968,6 +2969,7 @@ void d_exchange(struct dentry *dentry1, struct dentry *dentry2)
write_sequnlock(&rename_lock);
}
/**
* d_ancestor - search for an ancestor
diff --git a/fs/exec.c b/fs/exec.c
-index f7f6a140856a..1a740f3c42ba 100644
+index 18594f11c31fe..ac38c0424d2a3 100644
--- a/fs/exec.c
+++ b/fs/exec.c
-@@ -110,6 +110,7 @@ bool path_noexec(const struct path *path)
+@@ -114,6 +114,7 @@ bool path_noexec(const struct path *path)
return (path->mnt->mnt_flags & MNT_NOEXEC) ||
(path->mnt->mnt_sb->s_iflags & SB_I_NOEXEC);
}
#ifdef CONFIG_USELIB
/*
diff --git a/fs/fcntl.c b/fs/fcntl.c
-index d62303c5472a..d4ad34463848 100644
+index d8a12eb63961d..0532996186311 100644
--- a/fs/fcntl.c
+++ b/fs/fcntl.c
-@@ -85,6 +85,7 @@ int setfl(int fd, struct file * filp, unsigned long arg)
+@@ -86,6 +86,7 @@ int setfl(int fd, struct file *filp, unsigned long arg)
out:
return error;
}
static void f_modown(struct file *filp, struct pid *pid, enum pid_type type,
int force)
diff --git a/fs/file_table.c b/fs/file_table.c
-index b07b53f24ff5..34b9bbf4c556 100644
+index 45437f8e1003e..786af52904fcf 100644
--- a/fs/file_table.c
+++ b/fs/file_table.c
-@@ -162,6 +162,7 @@ struct file *alloc_empty_file(int flags, const struct cred *cred)
+@@ -161,6 +161,7 @@ struct file *alloc_empty_file(int flags, const struct cred *cred)
}
return ERR_PTR(-ENFILE);
}
/*
* Variant of alloc_empty_file() that doesn't check and modify nr_files.
-@@ -327,6 +328,7 @@ void flush_delayed_fput(void)
- {
- delayed_fput(NULL);
- }
-+EXPORT_SYMBOL_GPL(flush_delayed_fput);
-
- static DECLARE_DELAYED_WORK(delayed_fput_work, delayed_fput);
-
-@@ -374,6 +376,7 @@ void __fput_sync(struct file *file)
+@@ -375,6 +376,7 @@ void __fput_sync(struct file *file)
}
EXPORT_SYMBOL(fput);
void __init files_init(void)
{
diff --git a/fs/inode.c b/fs/inode.c
-index 43df8452f97d..8a5c14630ff0 100644
+index ba1df0895b69f..0672530acf7dd 100644
--- a/fs/inode.c
+++ b/fs/inode.c
-@@ -1679,6 +1679,7 @@ int update_time(struct inode *inode, struct timespec64 *time, int flags)
-
- return update_time(inode, time, flags);
+@@ -1778,6 +1778,7 @@ int update_time(struct inode *inode, struct timespec64 *time, int flags)
+ return inode->i_op->update_time(inode, time, flags);
+ return generic_update_time(inode, time, flags);
}
+EXPORT_SYMBOL_GPL(update_time);
/**
- * touch_atime - update the access time
+ * atime_needs_update - update the access time
diff --git a/fs/namespace.c b/fs/namespace.c
-index 34c8093ddb1d..2b64af58b643 100644
+index 540679d7e0434..74957d5edaa86 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
-@@ -431,6 +431,7 @@ void __mnt_drop_write(struct vfsmount *mnt)
+@@ -438,6 +438,7 @@ void __mnt_drop_write(struct vfsmount *mnt)
mnt_dec_writers(real_mount(mnt));
preempt_enable();
}
/**
* mnt_drop_write - give up write access to a mount
-@@ -781,6 +782,7 @@ int is_current_mnt_ns(struct vfsmount *mnt)
+@@ -812,6 +813,7 @@ int is_current_mnt_ns(struct vfsmount *mnt)
{
return check_mnt(real_mount(mnt));
}
/*
* vfsmount lock must be held for write
-@@ -1900,6 +1902,7 @@ int iterate_mounts(int (*f)(struct vfsmount *, void *), void *arg,
+@@ -1985,6 +1987,7 @@ int iterate_mounts(int (*f)(struct vfsmount *, void *), void *arg,
}
return 0;
}
static void lock_mnt_tree(struct mount *mnt)
{
diff --git a/fs/notify/group.c b/fs/notify/group.c
-index 0391190305cc..0b9f7f6d8390 100644
+index ffd723ffe46de..ec6172836b6f6 100644
--- a/fs/notify/group.c
+++ b/fs/notify/group.c
-@@ -99,6 +99,7 @@ void fsnotify_get_group(struct fsnotify_group *group)
+@@ -100,6 +100,7 @@ void fsnotify_get_group(struct fsnotify_group *group)
{
refcount_inc(&group->refcnt);
}
/*
* Drop a reference to a group. Free it if it's through.
-@@ -108,6 +109,7 @@ void fsnotify_put_group(struct fsnotify_group *group)
- if (refcount_dec_and_test(&group->refcnt))
- fsnotify_final_destroy_group(group);
- }
-+EXPORT_SYMBOL_GPL(fsnotify_put_group);
-
- /*
- * Create a new fsnotify_group and hold a reference for the group returned.
-@@ -137,6 +139,7 @@ struct fsnotify_group *fsnotify_alloc_group(const struct fsnotify_ops *ops)
-
- return group;
- }
-+EXPORT_SYMBOL_GPL(fsnotify_alloc_group);
-
- int fsnotify_fasync(int fd, struct file *file, int on)
- {
-diff --git a/fs/notify/mark.c b/fs/notify/mark.c
-index 99ddd126f6f0..2154d69a2c7a 100644
---- a/fs/notify/mark.c
-+++ b/fs/notify/mark.c
-@@ -276,6 +276,7 @@ void fsnotify_put_mark(struct fsnotify_mark *mark)
- queue_delayed_work(system_unbound_wq, &reaper_work,
- FSNOTIFY_REAPER_DELAY);
- }
-+EXPORT_SYMBOL_GPL(fsnotify_put_mark);
-
- /*
- * Get mark reference when we found the mark via lockless traversal of object
-@@ -430,6 +431,7 @@ void fsnotify_destroy_mark(struct fsnotify_mark *mark,
- mutex_unlock(&group->mark_mutex);
- fsnotify_free_mark(mark);
- }
-+EXPORT_SYMBOL_GPL(fsnotify_destroy_mark);
-
- /*
- * Sorting function for lists of fsnotify marks.
-@@ -685,6 +687,7 @@ int fsnotify_add_mark(struct fsnotify_mark *mark, fsnotify_connp_t *connp,
- mutex_unlock(&group->mark_mutex);
- return ret;
- }
-+EXPORT_SYMBOL_GPL(fsnotify_add_mark);
-
- /*
- * Given a list of marks, find the mark associated with given group. If found
-@@ -809,6 +812,7 @@ void fsnotify_init_mark(struct fsnotify_mark *mark,
- mark->group = group;
- WRITE_ONCE(mark->connector, NULL);
- }
-+EXPORT_SYMBOL_GPL(fsnotify_init_mark);
-
- /*
- * Destroy all marks in destroy_list, waits for SRCU period to finish before
diff --git a/fs/open.c b/fs/open.c
-index a59abe3c669a..78809163ba03 100644
+index e53af13b5835f..f37da065e6544 100644
--- a/fs/open.c
+++ b/fs/open.c
-@@ -65,6 +65,7 @@ int do_truncate(struct dentry *dentry, loff_t length, unsigned int time_attrs,
+@@ -65,6 +65,7 @@ int do_truncate(struct user_namespace *mnt_userns, struct dentry *dentry,
inode_unlock(dentry->d_inode);
return ret;
}
long vfs_truncate(const struct path *path, loff_t length)
{
diff --git a/fs/read_write.c b/fs/read_write.c
-index 3265bb84f152..5b2dbddb0efe 100644
+index 9db7adf160d20..8dc93a57a933f 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
-@@ -468,6 +468,7 @@ ssize_t vfs_read(struct file *file, char __user *buf, size_t count, loff_t *pos)
-
+@@ -503,6 +503,7 @@ ssize_t vfs_read(struct file *file, char __user *buf, size_t count, loff_t *pos)
+ inc_syscr(current);
return ret;
}
+EXPORT_SYMBOL_GPL(vfs_read);
static ssize_t new_sync_write(struct file *filp, const char __user *buf, size_t len, loff_t *ppos)
{
-@@ -508,6 +509,7 @@ vfs_readf_t vfs_readf(struct file *file)
- return new_sync_read;
- return ERR_PTR(-ENOSYS);
- }
-+EXPORT_SYMBOL_GPL(vfs_readf);
-
- vfs_writef_t vfs_writef(struct file *file)
- {
-@@ -519,6 +521,7 @@ vfs_writef_t vfs_writef(struct file *file)
- return new_sync_write;
- return ERR_PTR(-ENOSYS);
- }
-+EXPORT_SYMBOL_GPL(vfs_writef);
-
- ssize_t __kernel_write(struct file *file, const void *buf, size_t count, loff_t *pos)
- {
-@@ -588,6 +591,7 @@ ssize_t vfs_write(struct file *file, const char __user *buf, size_t count, loff_
-
+@@ -613,6 +614,7 @@ ssize_t vfs_write(struct file *file, const char __user *buf, size_t count, loff_
+ file_end_write(file);
return ret;
}
+EXPORT_SYMBOL_GPL(vfs_write);
/* file_ppos returns &file->f_pos or NULL if file is stream */
static inline loff_t *file_ppos(struct file *file)
diff --git a/fs/splice.c b/fs/splice.c
-index 75b489fcb66f..0a1f7498c22b 100644
+index 3e6ba363b7775..7c1be373eb7cd 100644
--- a/fs/splice.c
+++ b/fs/splice.c
-@@ -847,6 +847,7 @@ long do_splice_from(struct pipe_inode_info *pipe, struct file *out,
-
- return splice_write(pipe, out, ppos, len, flags);
+@@ -766,6 +766,7 @@ long do_splice_from(struct pipe_inode_info *pipe, struct file *out,
+ return warn_unsupported(out, "write");
+ return out->f_op->splice_write(pipe, out, ppos, len, flags);
}
+EXPORT_SYMBOL_GPL(do_splice_from);
/*
* Attempt to initiate a splice from a file to a pipe.
-@@ -876,6 +877,7 @@ long do_splice_to(struct file *in, loff_t *ppos,
-
- return splice_read(in, ppos, pipe, len, flags);
+@@ -795,6 +796,7 @@ long do_splice_to(struct file *in, loff_t *ppos,
+ return warn_unsupported(in, "read");
+ return in->f_op->splice_read(in, ppos, pipe, len, flags);
}
+EXPORT_SYMBOL_GPL(do_splice_to);
/**
* splice_direct_to_actor - splices data directly between two non-pipes
diff --git a/fs/sync.c b/fs/sync.c
-index 457f4e4a5cc1..67c66358f3fe 100644
+index b7b5a0a0df6ff..fa5c7fba7f1ba 100644
--- a/fs/sync.c
+++ b/fs/sync.c
@@ -39,6 +39,7 @@ int __sync_filesystem(struct super_block *sb, int wait)
/*
* Write out and wait upon all dirty data associated with this
diff --git a/fs/xattr.c b/fs/xattr.c
-index 90dd78f0eb27..40b01dd1b14a 100644
+index b3444e06cded4..7b0f851b63d75 100644
--- a/fs/xattr.c
+++ b/fs/xattr.c
-@@ -296,6 +296,7 @@ vfs_getxattr_alloc(struct dentry *dentry, const char *name, char **xattr_value,
+@@ -383,6 +383,7 @@ vfs_getxattr_alloc(struct user_namespace *mnt_userns, struct dentry *dentry,
*xattr_value = value;
return error;
}
ssize_t
__vfs_getxattr(struct dentry *dentry, struct inode *inode, const char *name,
diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c
-index ec87ccf82025..739d1c8a81f5 100644
+index fe71c2737eb9e..185531f89239a 100644
--- a/kernel/locking/lockdep.c
+++ b/kernel/locking/lockdep.c
-@@ -174,6 +174,7 @@ inline struct lock_class *lockdep_hlock_class(struct held_lock *hlock)
+@@ -209,6 +209,7 @@ inline struct lock_class *lockdep_hlock_class(struct held_lock *hlock)
*/
return lock_classes + class_idx;
}
#ifdef CONFIG_LOCK_STAT
diff --git a/kernel/task_work.c b/kernel/task_work.c
-index 0fef395662a6..83fb1ecfc33d 100644
+index 9cde961875c0a..ac8c79dc81813 100644
--- a/kernel/task_work.c
+++ b/kernel/task_work.c
-@@ -116,3 +116,4 @@ void task_work_run(void)
+@@ -143,3 +143,4 @@ void task_work_run(void)
} while (work);
}
}
+EXPORT_SYMBOL_GPL(task_work_run);
-diff --git a/security/device_cgroup.c b/security/device_cgroup.c
-index 725674f3276d..83f6494c52a2 100644
---- a/security/device_cgroup.c
-+++ b/security/device_cgroup.c
-@@ -824,3 +824,4 @@ int __devcgroup_check_permission(short type, u32 major, u32 minor,
-
- return 0;
- }
-+EXPORT_SYMBOL_GPL(__devcgroup_check_permission);
diff --git a/security/security.c b/security/security.c
-index 250ee2d76406..2765042d4846 100644
+index 5ac96b16f8fab..46d334d6ac1f6 100644
--- a/security/security.c
+++ b/security/security.c
-@@ -996,6 +996,7 @@ int security_path_rmdir(const struct path *dir, struct dentry *dentry)
+@@ -1102,6 +1102,7 @@ int security_path_rmdir(const struct path *dir, struct dentry *dentry)
return 0;
return call_int_hook(path_rmdir, 0, dir, dentry);
}
int security_path_unlink(const struct path *dir, struct dentry *dentry)
{
-@@ -1012,6 +1013,7 @@ int security_path_symlink(const struct path *dir, struct dentry *dentry,
+@@ -1118,6 +1119,7 @@ int security_path_symlink(const struct path *dir, struct dentry *dentry,
return 0;
return call_int_hook(path_symlink, 0, dir, dentry, old_name);
}
int security_path_link(struct dentry *old_dentry, const struct path *new_dir,
struct dentry *new_dentry)
-@@ -1020,6 +1022,7 @@ int security_path_link(struct dentry *old_dentry, const struct path *new_dir,
+@@ -1126,6 +1128,7 @@ int security_path_link(struct dentry *old_dentry, const struct path *new_dir,
return 0;
return call_int_hook(path_link, 0, old_dentry, new_dir, new_dentry);
}
int security_path_rename(const struct path *old_dir, struct dentry *old_dentry,
const struct path *new_dir, struct dentry *new_dentry,
-@@ -1047,6 +1050,7 @@ int security_path_truncate(const struct path *path)
+@@ -1153,6 +1156,7 @@ int security_path_truncate(const struct path *path)
return 0;
return call_int_hook(path_truncate, 0, path);
}
int security_path_chmod(const struct path *path, umode_t mode)
{
-@@ -1054,6 +1058,7 @@ int security_path_chmod(const struct path *path, umode_t mode)
+@@ -1160,6 +1164,7 @@ int security_path_chmod(const struct path *path, umode_t mode)
return 0;
return call_int_hook(path_chmod, 0, path, mode);
}
int security_path_chown(const struct path *path, kuid_t uid, kgid_t gid)
{
-@@ -1061,6 +1066,7 @@ int security_path_chown(const struct path *path, kuid_t uid, kgid_t gid)
+@@ -1167,6 +1172,7 @@ int security_path_chown(const struct path *path, kuid_t uid, kgid_t gid)
return 0;
return call_int_hook(path_chown, 0, path, uid, gid);
}
int security_path_chroot(const struct path *path)
{
-@@ -1161,6 +1167,7 @@ int security_inode_permission(struct inode *inode, int mask)
+@@ -1267,6 +1273,7 @@ int security_inode_permission(struct inode *inode, int mask)
return 0;
return call_int_hook(inode_permission, 0, inode, mask);
}
int security_inode_setattr(struct dentry *dentry, struct iattr *attr)
{
-@@ -1338,6 +1345,7 @@ int security_file_permission(struct file *file, int mask)
+@@ -1464,6 +1471,7 @@ int security_file_permission(struct file *file, int mask)
return fsnotify_perm(file, mask);
}
{
diff -urN /usr/share/empty/Documentation/ABI/testing/debugfs-aufs linux/Documentation/ABI/testing/debugfs-aufs
--- /usr/share/empty/Documentation/ABI/testing/debugfs-aufs 1970-01-01 01:00:00.000000000 +0100
-+++ linux/Documentation/ABI/testing/debugfs-aufs 2019-07-11 15:42:14.455570938 +0200
++++ linux/Documentation/ABI/testing/debugfs-aufs 2021-05-02 20:15:14.666670785 +0200
@@ -0,0 +1,55 @@
+What: /debug/aufs/si_<id>/
+Date: March 2009
+ When the aufs mount option 'noxino' is specified, it
+ will be empty. About XINO files, see the aufs manual.
+
-+What: /debug/aufs/si_<id>/xi0, xi1 ... xiN and xiN-N
++What: /debug/aufs/si_<id>/xi<branch-index>
+Date: March 2009
+Contact: J. R. Okajima <hooanon05g@gmail.com>
+Description:
+ will be empty. About XINO files, see the aufs manual.
diff -urN /usr/share/empty/Documentation/ABI/testing/sysfs-aufs linux/Documentation/ABI/testing/sysfs-aufs
--- /usr/share/empty/Documentation/ABI/testing/sysfs-aufs 1970-01-01 01:00:00.000000000 +0100
-+++ linux/Documentation/ABI/testing/sysfs-aufs 2019-07-11 15:42:14.455570938 +0200
++++ linux/Documentation/ABI/testing/sysfs-aufs 2021-05-02 20:15:14.666670785 +0200
@@ -0,0 +1,31 @@
+What: /sys/fs/aufs/si_<id>/
+Date: March 2009
+ per aufs mount, where <id> is a unique id generated
+ internally.
+
-+What: /sys/fs/aufs/si_<id>/br0, br1 ... brN
++What: /sys/fs/aufs/si_<id>/br<idx>
+Date: March 2009
+Contact: J. R. Okajima <hooanon05g@gmail.com>
+Description:
+ It shows the abolute path of a member directory (which
+ is called branch) in aufs, and its permission.
+
-+What: /sys/fs/aufs/si_<id>/brid0, brid1 ... bridN
++What: /sys/fs/aufs/si_<id>/brid<idx>
+Date: July 2013
+Contact: J. R. Okajima <hooanon05g@gmail.com>
+Description:
+ will be empty. About XINO files, see the aufs manual.
diff -urN /usr/share/empty/Documentation/filesystems/aufs/design/01intro.txt linux/Documentation/filesystems/aufs/design/01intro.txt
--- /usr/share/empty/Documentation/filesystems/aufs/design/01intro.txt 1970-01-01 01:00:00.000000000 +0100
-+++ linux/Documentation/filesystems/aufs/design/01intro.txt 2019-07-11 15:42:14.455570938 +0200
++++ linux/Documentation/filesystems/aufs/design/01intro.txt 2021-05-02 20:15:14.666670785 +0200
@@ -0,0 +1,171 @@
+
-+# Copyright (C) 2005-2019 Junjiro R. Okajima
++# Copyright (C) 2005-2020 Junjiro R. Okajima
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+about it. But currently I have implemented it in kernel space.
diff -urN /usr/share/empty/Documentation/filesystems/aufs/design/02struct.txt linux/Documentation/filesystems/aufs/design/02struct.txt
--- /usr/share/empty/Documentation/filesystems/aufs/design/02struct.txt 1970-01-01 01:00:00.000000000 +0100
-+++ linux/Documentation/filesystems/aufs/design/02struct.txt 2019-07-11 15:42:14.455570938 +0200
++++ linux/Documentation/filesystems/aufs/design/02struct.txt 2021-05-02 20:15:14.666670785 +0200
@@ -0,0 +1,258 @@
+
-+# Copyright (C) 2005-2019 Junjiro R. Okajima
++# Copyright (C) 2005-2020 Junjiro R. Okajima
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+For this purpose, use "aumvdown" command in aufs-util.git.
diff -urN /usr/share/empty/Documentation/filesystems/aufs/design/03atomic_open.txt linux/Documentation/filesystems/aufs/design/03atomic_open.txt
--- /usr/share/empty/Documentation/filesystems/aufs/design/03atomic_open.txt 1970-01-01 01:00:00.000000000 +0100
-+++ linux/Documentation/filesystems/aufs/design/03atomic_open.txt 2019-07-11 15:42:14.458904362 +0200
++++ linux/Documentation/filesystems/aufs/design/03atomic_open.txt 2021-05-02 20:15:14.666670785 +0200
@@ -0,0 +1,85 @@
+
-+# Copyright (C) 2015-2019 Junjiro R. Okajima
++# Copyright (C) 2015-2020 Junjiro R. Okajima
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+ be implemented in aufs, but not all I am afraid.
diff -urN /usr/share/empty/Documentation/filesystems/aufs/design/03lookup.txt linux/Documentation/filesystems/aufs/design/03lookup.txt
--- /usr/share/empty/Documentation/filesystems/aufs/design/03lookup.txt 1970-01-01 01:00:00.000000000 +0100
-+++ linux/Documentation/filesystems/aufs/design/03lookup.txt 2019-07-11 15:42:14.458904362 +0200
++++ linux/Documentation/filesystems/aufs/design/03lookup.txt 2021-05-02 20:15:14.666670785 +0200
@@ -0,0 +1,113 @@
+
-+# Copyright (C) 2005-2019 Junjiro R. Okajima
++# Copyright (C) 2005-2020 Junjiro R. Okajima
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+ by over-mounting something (or another method).
diff -urN /usr/share/empty/Documentation/filesystems/aufs/design/04branch.txt linux/Documentation/filesystems/aufs/design/04branch.txt
--- /usr/share/empty/Documentation/filesystems/aufs/design/04branch.txt 1970-01-01 01:00:00.000000000 +0100
-+++ linux/Documentation/filesystems/aufs/design/04branch.txt 2019-07-11 15:42:14.458904362 +0200
++++ linux/Documentation/filesystems/aufs/design/04branch.txt 2021-05-02 20:15:14.670004120 +0200
@@ -0,0 +1,74 @@
+
-+# Copyright (C) 2005-2019 Junjiro R. Okajima
++# Copyright (C) 2005-2020 Junjiro R. Okajima
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+ same named entry on the upper branch.
diff -urN /usr/share/empty/Documentation/filesystems/aufs/design/05wbr_policy.txt linux/Documentation/filesystems/aufs/design/05wbr_policy.txt
--- /usr/share/empty/Documentation/filesystems/aufs/design/05wbr_policy.txt 1970-01-01 01:00:00.000000000 +0100
-+++ linux/Documentation/filesystems/aufs/design/05wbr_policy.txt 2019-07-11 15:42:14.458904362 +0200
++++ linux/Documentation/filesystems/aufs/design/05wbr_policy.txt 2021-05-02 20:15:14.670004120 +0200
@@ -0,0 +1,64 @@
+
-+# Copyright (C) 2005-2019 Junjiro R. Okajima
++# Copyright (C) 2005-2020 Junjiro R. Okajima
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+ copyup policy.
diff -urN /usr/share/empty/Documentation/filesystems/aufs/design/06dirren.dot linux/Documentation/filesystems/aufs/design/06dirren.dot
--- /usr/share/empty/Documentation/filesystems/aufs/design/06dirren.dot 1970-01-01 01:00:00.000000000 +0100
-+++ linux/Documentation/filesystems/aufs/design/06dirren.dot 2019-07-11 15:42:14.458904362 +0200
++++ linux/Documentation/filesystems/aufs/design/06dirren.dot 2021-05-02 20:15:14.670004120 +0200
@@ -0,0 +1,31 @@
+
+// to view this graph, run dot(1) command in GRAPHVIZ.
+}
diff -urN /usr/share/empty/Documentation/filesystems/aufs/design/06dirren.txt linux/Documentation/filesystems/aufs/design/06dirren.txt
--- /usr/share/empty/Documentation/filesystems/aufs/design/06dirren.txt 1970-01-01 01:00:00.000000000 +0100
-+++ linux/Documentation/filesystems/aufs/design/06dirren.txt 2019-07-11 15:42:14.458904362 +0200
++++ linux/Documentation/filesystems/aufs/design/06dirren.txt 2021-05-02 20:15:14.670004120 +0200
@@ -0,0 +1,102 @@
+
-+# Copyright (C) 2017-2019 Junjiro R. Okajima
++# Copyright (C) 2017-2020 Junjiro R. Okajima
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+equivalen to udba=reval case.
diff -urN /usr/share/empty/Documentation/filesystems/aufs/design/06fhsm.txt linux/Documentation/filesystems/aufs/design/06fhsm.txt
--- /usr/share/empty/Documentation/filesystems/aufs/design/06fhsm.txt 1970-01-01 01:00:00.000000000 +0100
-+++ linux/Documentation/filesystems/aufs/design/06fhsm.txt 2019-07-11 15:42:14.458904362 +0200
++++ linux/Documentation/filesystems/aufs/design/06fhsm.txt 2021-05-02 20:15:14.670004120 +0200
@@ -0,0 +1,120 @@
+
-+# Copyright (C) 2011-2019 Junjiro R. Okajima
++# Copyright (C) 2011-2020 Junjiro R. Okajima
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+should restore the original file state after an error happens.
diff -urN /usr/share/empty/Documentation/filesystems/aufs/design/06mmap.txt linux/Documentation/filesystems/aufs/design/06mmap.txt
--- /usr/share/empty/Documentation/filesystems/aufs/design/06mmap.txt 1970-01-01 01:00:00.000000000 +0100
-+++ linux/Documentation/filesystems/aufs/design/06mmap.txt 2019-07-11 15:42:14.458904362 +0200
++++ linux/Documentation/filesystems/aufs/design/06mmap.txt 2021-05-02 20:15:14.670004120 +0200
@@ -0,0 +1,72 @@
+
-+# Copyright (C) 2005-2019 Junjiro R. Okajima
++# Copyright (C) 2005-2020 Junjiro R. Okajima
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+I have to give up this "looks-smater" approach.
diff -urN /usr/share/empty/Documentation/filesystems/aufs/design/06xattr.txt linux/Documentation/filesystems/aufs/design/06xattr.txt
--- /usr/share/empty/Documentation/filesystems/aufs/design/06xattr.txt 1970-01-01 01:00:00.000000000 +0100
-+++ linux/Documentation/filesystems/aufs/design/06xattr.txt 2019-07-11 15:42:14.458904362 +0200
++++ linux/Documentation/filesystems/aufs/design/06xattr.txt 2021-05-02 20:15:14.670004120 +0200
@@ -0,0 +1,96 @@
+
-+# Copyright (C) 2014-2019 Junjiro R. Okajima
++# Copyright (C) 2014-2020 Junjiro R. Okajima
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+now, aufs implements the branch attributes to ignore the error.
diff -urN /usr/share/empty/Documentation/filesystems/aufs/design/07export.txt linux/Documentation/filesystems/aufs/design/07export.txt
--- /usr/share/empty/Documentation/filesystems/aufs/design/07export.txt 1970-01-01 01:00:00.000000000 +0100
-+++ linux/Documentation/filesystems/aufs/design/07export.txt 2019-07-11 15:42:14.458904362 +0200
++++ linux/Documentation/filesystems/aufs/design/07export.txt 2021-05-02 20:15:14.670004120 +0200
@@ -0,0 +1,58 @@
+
-+# Copyright (C) 2005-2019 Junjiro R. Okajima
++# Copyright (C) 2005-2020 Junjiro R. Okajima
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+ lookup_one_len(), vfs_getattr(), encode_fh() and others.
diff -urN /usr/share/empty/Documentation/filesystems/aufs/design/08shwh.txt linux/Documentation/filesystems/aufs/design/08shwh.txt
--- /usr/share/empty/Documentation/filesystems/aufs/design/08shwh.txt 1970-01-01 01:00:00.000000000 +0100
-+++ linux/Documentation/filesystems/aufs/design/08shwh.txt 2019-07-11 15:42:14.458904362 +0200
++++ linux/Documentation/filesystems/aufs/design/08shwh.txt 2021-05-02 20:15:14.670004120 +0200
@@ -0,0 +1,52 @@
+
-+# Copyright (C) 2005-2019 Junjiro R. Okajima
++# Copyright (C) 2005-2020 Junjiro R. Okajima
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+initramfs will use it to replace the old one at the next boot.
diff -urN /usr/share/empty/Documentation/filesystems/aufs/design/10dynop.txt linux/Documentation/filesystems/aufs/design/10dynop.txt
--- /usr/share/empty/Documentation/filesystems/aufs/design/10dynop.txt 1970-01-01 01:00:00.000000000 +0100
-+++ linux/Documentation/filesystems/aufs/design/10dynop.txt 2019-07-11 15:42:14.458904362 +0200
++++ linux/Documentation/filesystems/aufs/design/10dynop.txt 2021-05-02 20:15:14.670004120 +0200
@@ -0,0 +1,47 @@
+
-+# Copyright (C) 2010-2019 Junjiro R. Okajima
++# Copyright (C) 2010-2020 Junjiro R. Okajima
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+regular files only.
diff -urN /usr/share/empty/Documentation/filesystems/aufs/README linux/Documentation/filesystems/aufs/README
--- /usr/share/empty/Documentation/filesystems/aufs/README 1970-01-01 01:00:00.000000000 +0100
-+++ linux/Documentation/filesystems/aufs/README 2019-07-11 15:42:14.455570938 +0200
-@@ -0,0 +1,399 @@
++++ linux/Documentation/filesystems/aufs/README 2021-05-02 20:15:14.666670785 +0200
+@@ -0,0 +1,401 @@
+
+Aufs5 -- advanced multi layered unification filesystem version 5.x
+http://aufs.sf.net
+ the internal locks for LOCKDEP is necessary. LOCKDEP is a debugging
+ feature of linux kernel. If you enable CONFIG_LOCKDEP, then you will
+ need to apply this debug patch to expand several constant values.
-+ If don't know what LOCKDEP is, then you don't have apply this patch.
++ If you don't know what LOCKDEP is, then you don't have apply this
++ patch.
+
+
+4. Usage
+ system, instead of the date you downloaded.
+- configuration (define/undefine CONFIG_AUFS_xxx)
+- kernel configuration or /proc/config.gz (if you have it)
++- LSM (linux security module, if you are using)
+- behaviour which you think to be incorrect
+- actual operation, reproducible one is better
+- mailto: aufs-users at lists.sourceforge.net
+# End: ;
diff -urN /usr/share/empty/fs/aufs/aufs.h linux/fs/aufs/aufs.h
--- /usr/share/empty/fs/aufs/aufs.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/aufs.h 2019-07-11 15:42:14.462237786 +0200
++++ linux/fs/aufs/aufs.h 2021-05-02 20:15:14.670004120 +0200
@@ -0,0 +1,62 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+#endif /* __AUFS_H__ */
diff -urN /usr/share/empty/fs/aufs/branch.c linux/fs/aufs/branch.c
--- /usr/share/empty/fs/aufs/branch.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/branch.c 2019-09-16 09:38:43.216175640 +0200
-@@ -0,0 +1,1428 @@
++++ linux/fs/aufs/branch.c 2021-05-02 20:15:14.670004120 +0200
+@@ -0,0 +1,1427 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ spin_unlock(&hf->f_lock);
+ if (writer) {
+ h_inode = file_inode(hf);
++ if (hf->f_mode & FMODE_READ)
++ i_readcount_inc(h_inode);
+ put_write_access(h_inode);
+ __mnt_drop_write(hf->f_path.mnt);
-+ if ((hf->f_mode & (FMODE_READ | FMODE_WRITE))
-+ == FMODE_READ)
-+ i_readcount_inc(h_inode);
+ }
+ }
+
+}
diff -urN /usr/share/empty/fs/aufs/branch.h linux/fs/aufs/branch.h
--- /usr/share/empty/fs/aufs/branch.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/branch.h 2019-07-11 15:42:14.462237786 +0200
-@@ -0,0 +1,366 @@
++++ linux/fs/aufs/branch.h 2021-05-02 20:15:14.670004120 +0200
+@@ -0,0 +1,375 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ return br->br_path.dentry;
+}
+
++static inline struct user_namespace *au_br_userns(struct au_branch *br)
++{
++ return mnt_user_ns(br->br_path.mnt);
++}
++
+static inline struct super_block *au_br_sb(struct au_branch *br)
+{
+ return au_br_mnt(br)->mnt_sb;
+ ino_t *ino);
+int au_xino_write(struct super_block *sb, aufs_bindex_t bindex, ino_t h_ino,
+ ino_t ino);
-+ssize_t xino_fread(vfs_readf_t func, struct file *file, void *buf, size_t size,
-+ loff_t *pos);
-+ssize_t xino_fwrite(vfs_writef_t func, struct file *file, void *buf,
-+ size_t size, loff_t *pos);
++ssize_t xino_fread(struct file *file, void *buf, size_t size, loff_t *pos);
++ssize_t xino_fwrite(struct file *file, void *buf, size_t size, loff_t *pos);
+
+int au_xib_trunc(struct super_block *sb);
+int au_xino_trunc(struct super_block *sb, aufs_bindex_t bindex, int idx_begin);
+}
+
+static inline
++struct user_namespace *au_sbr_userns(struct super_block *sb, aufs_bindex_t bindex)
++{
++ return au_br_userns(au_sbr(sb, bindex));
++}
++
++static inline
+struct super_block *au_sbr_sb(struct super_block *sb, aufs_bindex_t bindex)
+{
+ return au_br_sb(au_sbr(sb, bindex));
+#endif /* __AUFS_BRANCH_H__ */
diff -urN /usr/share/empty/fs/aufs/conf.mk linux/fs/aufs/conf.mk
--- /usr/share/empty/fs/aufs/conf.mk 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/conf.mk 2019-07-11 15:42:14.462237786 +0200
++++ linux/fs/aufs/conf.mk 2021-05-02 20:15:14.670004120 +0200
@@ -0,0 +1,40 @@
+# SPDX-License-Identifier: GPL-2.0
+
+-include ${srctree}/${src}/conf_priv.mk
diff -urN /usr/share/empty/fs/aufs/cpup.c linux/fs/aufs/cpup.c
--- /usr/share/empty/fs/aufs/cpup.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/cpup.c 2019-07-11 15:42:14.462237786 +0200
-@@ -0,0 +1,1458 @@
++++ linux/fs/aufs/cpup.c 2021-05-02 20:15:14.673337458 +0200
+@@ -0,0 +1,1457 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+};
+
+static noinline_for_stack
-+int cpup_iattr(struct dentry *dst, aufs_bindex_t bindex, struct dentry *h_src,
++int cpup_iattr(struct dentry *dst, aufs_bindex_t bindex, struct path *h_src,
+ struct au_cpup_reg_attr *h_src_attr)
+{
+ int err, sbits, icex;
+ struct kstat *h_st;
+ struct au_branch *br;
+
-+ h_path.dentry = au_h_dptr(dst, bindex);
-+ h_idst = d_inode(h_path.dentry);
+ br = au_sbr(dst->d_sb, bindex);
+ h_path.mnt = au_br_mnt(br);
-+ h_isrc = d_inode(h_src);
++ h_path.dentry = au_h_dptr(dst, bindex);
++ h_idst = d_inode(h_path.dentry);
++ h_isrc = d_inode(h_src->dentry);
+ ia.ia_valid = ATTR_FORCE | ATTR_UID | ATTR_GID
+ | ATTR_ATIME | ATTR_MTIME
+ | ATTR_ATIME_SET | ATTR_MTIME_SET;
+ if (!err) {
+ mnt_flags = au_mntflags(dst->d_sb);
+ verbose = !!au_opt_test(mnt_flags, VERBOSE);
-+ err = au_cpup_xattr(h_path.dentry, h_src, icex, verbose);
++ err = au_cpup_xattr(&h_path, h_src, icex, verbose);
+ }
+
+ return err;
+static int au_do_cpup_symlink(struct path *h_path, struct dentry *h_src,
+ struct inode *h_dir)
+{
-+ int err, symlen;
-+ mm_segment_t old_fs;
-+ union {
-+ char *k;
-+ char __user *u;
-+ } sym;
++ int err;
++ DEFINE_DELAYED_CALL(done);
++ const char *sym;
+
-+ err = -ENOMEM;
-+ sym.k = (void *)__get_free_page(GFP_NOFS);
-+ if (unlikely(!sym.k))
++ sym = vfs_get_link(h_src, &done);
++ err = PTR_ERR(sym);
++ if (IS_ERR(sym))
+ goto out;
+
-+ /* unnecessary to support mmap_sem since symlink is not mmap-able */
-+ old_fs = get_fs();
-+ set_fs(KERNEL_DS);
-+ symlen = vfs_readlink(h_src, sym.u, PATH_MAX);
-+ err = symlen;
-+ set_fs(old_fs);
-+
-+ if (symlen > 0) {
-+ sym.k[symlen] = 0;
-+ err = vfsub_symlink(h_dir, h_path, sym.k);
-+ }
-+ free_page((unsigned long)sym.k);
++ err = vfsub_symlink(h_dir, h_path, sym);
+
+out:
++ do_delayed_call(&done);
+ return err;
+}
+
+ int err;
+ struct dentry *h_dentry;
+ struct inode *h_inode;
++ struct user_namespace *h_userns;
+
++ h_userns = mnt_user_ns(h_path->mnt);
+ h_dentry = h_path->dentry;
+ h_inode = d_inode(h_dentry);
+ /* forget_all_cached_acls(h_inode)); */
-+ err = vfsub_removexattr(h_dentry, XATTR_NAME_POSIX_ACL_ACCESS);
++ err = vfsub_removexattr(h_userns, h_dentry, XATTR_NAME_POSIX_ACL_ACCESS);
+ AuTraceErr(err);
+ if (err == -EOPNOTSUPP)
+ err = 0;
+ if (!err)
-+ err = vfsub_acl_chmod(h_inode, mode);
++ err = vfsub_acl_chmod(h_userns, h_inode, mode);
+
+ AuTraceErr(err);
+ return err;
+{
+ int err;
+ struct inode *dir, *inode;
++ struct user_namespace *h_userns;
+
-+ err = vfsub_removexattr(h_path->dentry, XATTR_NAME_POSIX_ACL_DEFAULT);
++ h_userns = mnt_user_ns(h_path->mnt);
++ err = vfsub_removexattr(h_userns, h_path->dentry,
++ XATTR_NAME_POSIX_ACL_DEFAULT);
+ AuTraceErr(err);
+ if (err == -EOPNOTSUPP)
+ err = 0;
+ case S_IFCHR:
+ case S_IFBLK:
+ AuDebugOn(!capable(CAP_MKNOD));
-+ /*FALLTHROUGH*/
++ fallthrough;
+ case S_IFIFO:
+ case S_IFSOCK:
+ err = vfsub_mknod(h_dir, &h_path, mode, h_inode->i_rdev);
+ struct inode *dst_inode, *h_dir, *inode, *delegated, *src_inode;
+ struct super_block *sb;
+ struct au_branch *br;
++ struct path h_src_path;
+ /* to reduce stack size */
+ struct {
+ struct au_dtime dt;
+ /* todo: necessary? */
+ /* au_pin_hdir_unlock(cpg->pin); */
+
-+ err = cpup_iattr(cpg->dentry, cpg->bdst, h_src, &a->h_src_attr);
++ h_src_path.dentry = h_src;
++ h_src_path.mnt = au_sbr_mnt(sb, cpg->bsrc);
++ err = cpup_iattr(cpg->dentry, cpg->bdst, &h_src_path, &a->h_src_attr);
+ if (unlikely(err)) {
+ /* todo: necessary? */
+ /* au_pin_hdir_relock(cpg->pin); */ /* ignore an error */
+ struct dentry *dentry, *parent;
+ struct file *h_file;
+ struct inode *h_dir;
++ struct user_namespace *h_userns;
+
+ dentry = cpg->dentry;
+ h_file = NULL;
+
+ parent = dget_parent(dentry);
+ h_dir = au_h_iptr(d_inode(parent), cpg->bdst);
-+ if (!au_test_h_perm_sio(h_dir, MAY_EXEC | MAY_WRITE)
++ h_userns = au_sbr_userns(dentry->d_sb, cpg->bdst);
++ if (!au_test_h_perm_sio(h_userns, h_dir, MAY_EXEC | MAY_WRITE)
+ && !au_cpup_sio_test(cpg->pin, d_inode(dentry)->i_mode))
+ err = au_cpup_simple(cpg);
+ else {
+ struct inode *dir, *h_dir, *h_tmpdir;
+ struct au_wbr *wbr;
+ struct au_pin wh_pin, *pin_orig;
++ struct user_namespace *h_userns;
+
+ dentry = cpg->dentry;
+ bdst = cpg->bdst;
+ cpg->pin = &wh_pin;
+ }
+
-+ if (!au_test_h_perm_sio(h_tmpdir, MAY_EXEC | MAY_WRITE)
++ h_userns = au_sbr_userns(dentry->d_sb, bdst);
++ if (!au_test_h_perm_sio(h_userns, h_tmpdir, MAY_EXEC | MAY_WRITE)
+ && !au_cpup_sio_test(cpg->pin, d_inode(dentry)->i_mode))
+ err = au_cpup_wh(cpg, file);
+ else {
+}
diff -urN /usr/share/empty/fs/aufs/cpup.h linux/fs/aufs/cpup.h
--- /usr/share/empty/fs/aufs/cpup.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/cpup.h 2019-07-11 15:42:14.462237786 +0200
++++ linux/fs/aufs/cpup.h 2021-05-02 20:15:14.673337458 +0200
@@ -0,0 +1,100 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+#endif /* __AUFS_CPUP_H__ */
diff -urN /usr/share/empty/fs/aufs/dbgaufs.c linux/fs/aufs/dbgaufs.c
--- /usr/share/empty/fs/aufs/dbgaufs.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/dbgaufs.c 2019-07-11 15:42:14.462237786 +0200
++++ linux/fs/aufs/dbgaufs.c 2021-05-02 20:15:14.673337458 +0200
@@ -0,0 +1,526 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+}
diff -urN /usr/share/empty/fs/aufs/dbgaufs.h linux/fs/aufs/dbgaufs.h
--- /usr/share/empty/fs/aufs/dbgaufs.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/dbgaufs.h 2019-07-11 15:42:14.462237786 +0200
++++ linux/fs/aufs/dbgaufs.h 2021-05-02 20:15:14.673337458 +0200
@@ -0,0 +1,53 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+#endif /* __DBGAUFS_H__ */
diff -urN /usr/share/empty/fs/aufs/dcsub.c linux/fs/aufs/dcsub.c
--- /usr/share/empty/fs/aufs/dcsub.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/dcsub.c 2019-07-11 15:42:14.462237786 +0200
++++ linux/fs/aufs/dcsub.c 2021-05-02 20:15:14.673337458 +0200
@@ -0,0 +1,225 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+}
diff -urN /usr/share/empty/fs/aufs/dcsub.h linux/fs/aufs/dcsub.h
--- /usr/share/empty/fs/aufs/dcsub.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/dcsub.h 2019-07-11 15:42:14.462237786 +0200
++++ linux/fs/aufs/dcsub.h 2021-05-02 20:15:14.673337458 +0200
@@ -0,0 +1,137 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+#endif /* __AUFS_DCSUB_H__ */
diff -urN /usr/share/empty/fs/aufs/debug.c linux/fs/aufs/debug.c
--- /usr/share/empty/fs/aufs/debug.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/debug.c 2019-07-11 15:42:14.462237786 +0200
++++ linux/fs/aufs/debug.c 2021-05-02 20:15:14.673337458 +0200
@@ -0,0 +1,441 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+}
diff -urN /usr/share/empty/fs/aufs/debug.h linux/fs/aufs/debug.h
--- /usr/share/empty/fs/aufs/debug.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/debug.h 2019-07-11 15:42:14.462237786 +0200
++++ linux/fs/aufs/debug.h 2021-05-02 20:15:14.673337458 +0200
@@ -0,0 +1,226 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+#endif /* __AUFS_DEBUG_H__ */
diff -urN /usr/share/empty/fs/aufs/dentry.c linux/fs/aufs/dentry.c
--- /usr/share/empty/fs/aufs/dentry.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/dentry.c 2019-07-11 15:42:14.462237786 +0200
-@@ -0,0 +1,1154 @@
++++ linux/fs/aufs/dentry.c 2021-05-02 20:15:14.673337458 +0200
+@@ -0,0 +1,1160 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ struct dentry *h_dentry;
+ struct inode *h_inode;
+ struct au_branch *br;
++ struct user_namespace *h_userns;
+ int wh_found, opq;
+ unsigned char wh_able;
+ const unsigned char allow_neg = !!au_ftest_lkup(args->flags, ALLOW_NEG);
+
+ wh_found = 0;
+ br = au_sbr(dentry->d_sb, bindex);
++ h_userns = au_br_userns(br);
+ wh_able = !!au_br_whable(br->br_perm);
+ if (wh_able)
-+ wh_found = au_wh_test(h_parent, &args->whname, ignore_perm);
++ wh_found = au_wh_test(h_userns, h_parent, &args->whname,
++ ignore_perm);
+ h_dentry = ERR_PTR(wh_found);
+ if (!wh_found)
+ goto real_lookup;
+ if (!ignore_perm)
+ h_dentry = vfsub_lkup_one(args->name, h_parent);
+ else
-+ h_dentry = au_sio_lkup_one(args->name, h_parent);
++ h_dentry = au_sio_lkup_one(h_userns, args->name, h_parent);
+ if (IS_ERR(h_dentry)) {
+ if (PTR_ERR(h_dentry) == -ENAMETOOLONG
+ && !allow_neg)
+ goto out; /* success */
+
+ inode_lock_shared_nested(h_inode, AuLsc_I_CHILD);
-+ opq = au_diropq_test(h_dentry);
++ opq = au_diropq_test(h_userns, h_dentry);
+ inode_unlock_shared(h_inode);
+ if (opq > 0)
+ au_set_dbdiropq(dentry, bindex);
+ return err;
+}
+
-+struct dentry *au_sio_lkup_one(struct qstr *name, struct dentry *parent)
++struct dentry *au_sio_lkup_one(struct user_namespace *userns, struct qstr *name,
++ struct dentry *parent)
+{
+ struct dentry *dentry;
+ int wkq_err;
+
-+ if (!au_test_h_perm_sio(d_inode(parent), MAY_EXEC))
++ if (!au_test_h_perm_sio(userns, d_inode(parent), MAY_EXEC))
+ dentry = vfsub_lkup_one(name, parent);
+ else {
+ struct vfsub_lkup_one_args args = {
+ int err;
+ struct dentry *parent, *h_parent, *h_dentry;
+ struct au_branch *br;
++ struct user_namespace *h_userns;
+
+ parent = dget_parent(dentry);
+ h_parent = au_h_dptr(parent, bindex);
+ br = au_sbr(dentry->d_sb, bindex);
++ h_userns = au_br_userns(br);
+ if (wh)
+ h_dentry = au_whtmp_lkup(h_parent, br, &dentry->d_name);
+ else
-+ h_dentry = au_sio_lkup_one(&dentry->d_name, h_parent);
++ h_dentry = au_sio_lkup_one(h_userns, &dentry->d_name, h_parent);
+ err = PTR_ERR(h_dentry);
+ if (IS_ERR(h_dentry))
+ goto out;
+};
diff -urN /usr/share/empty/fs/aufs/dentry.h linux/fs/aufs/dentry.h
--- /usr/share/empty/fs/aufs/dentry.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/dentry.h 2019-07-11 15:42:14.462237786 +0200
-@@ -0,0 +1,268 @@
++++ linux/fs/aufs/dentry.h 2021-05-02 20:15:14.673337458 +0200
+@@ -0,0 +1,269 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+/* dentry.c */
+extern const struct dentry_operations aufs_dop, aufs_dop_noreval;
+struct au_branch;
-+struct dentry *au_sio_lkup_one(struct qstr *name, struct dentry *parent);
++struct dentry *au_sio_lkup_one(struct user_namespace *userns, struct qstr *name,
++ struct dentry *parent);
+int au_h_verify(struct dentry *h_dentry, unsigned int udba, struct inode *h_dir,
+ struct dentry *h_parent, struct au_branch *br);
+
+#endif /* __AUFS_DENTRY_H__ */
diff -urN /usr/share/empty/fs/aufs/dinfo.c linux/fs/aufs/dinfo.c
--- /usr/share/empty/fs/aufs/dinfo.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/dinfo.c 2019-07-11 15:42:14.462237786 +0200
++++ linux/fs/aufs/dinfo.c 2021-05-02 20:15:14.673337458 +0200
@@ -0,0 +1,554 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+}
diff -urN /usr/share/empty/fs/aufs/dir.c linux/fs/aufs/dir.c
--- /usr/share/empty/fs/aufs/dir.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/dir.c 2019-07-11 15:42:14.462237786 +0200
-@@ -0,0 +1,763 @@
++++ linux/fs/aufs/dir.c 2021-05-02 20:15:14.673337458 +0200
+@@ -0,0 +1,765 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ int err, wkq_err;
+ struct dentry *h_dentry;
+ struct inode *h_inode;
++ struct user_namespace *h_userns;
+
++ h_userns = au_sbr_userns(dentry->d_sb, arg->bindex);
+ h_dentry = au_h_dptr(dentry, arg->bindex);
+ h_inode = d_inode(h_dentry);
+ /* todo: i_mode changes anytime? */
+ inode_lock_shared_nested(h_inode, AuLsc_I_CHILD);
-+ err = au_test_h_perm_sio(h_inode, MAY_EXEC | MAY_READ);
++ err = au_test_h_perm_sio(h_userns, h_inode, MAY_EXEC | MAY_READ);
+ inode_unlock_shared(h_inode);
+ if (!err)
+ err = do_test_empty(dentry, arg);
+};
diff -urN /usr/share/empty/fs/aufs/dir.h linux/fs/aufs/dir.h
--- /usr/share/empty/fs/aufs/dir.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/dir.h 2019-07-11 15:42:14.462237786 +0200
++++ linux/fs/aufs/dir.h 2021-05-02 20:15:14.673337458 +0200
@@ -0,0 +1,134 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+
+struct au_vdir_destr {
+ unsigned char len;
-+ unsigned char name[0];
++ unsigned char name[];
+} __packed;
+
+struct au_vdir_dehstr {
+#endif /* __AUFS_DIR_H__ */
diff -urN /usr/share/empty/fs/aufs/dirren.c linux/fs/aufs/dirren.c
--- /usr/share/empty/fs/aufs/dirren.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/dirren.c 2019-07-11 15:42:14.462237786 +0200
++++ linux/fs/aufs/dirren.c 2021-05-02 20:15:14.673337458 +0200
@@ -0,0 +1,1316 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2017-2019 Junjiro R. Okajima
++ * Copyright (C) 2017-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ found = 0;
+ idx = au_dr_ihash(ino);
+ hbl = dr->dr_h_ino + idx;
-+#if 0
++#if 0 /* debug print */
+ {
+ struct hlist_bl_node *tmp;
+
+ err = PTR_ERR(hinopath.dentry);
+ if (IS_ERR(hinopath.dentry))
+ goto out_unlock;
++ hinopath.mnt = path->mnt;
+
+ err = 0;
+ flags = O_RDONLY;
+ }
+ flags = O_WRONLY;
+ }
-+ hinopath.mnt = path->mnt;
+ hinofile = vfsub_dentry_open(&hinopath, flags);
+ if (suspend)
+ au_hn_inode_unlock(hdir);
+struct au_drinfo_rev {
+ unsigned char already;
+ aufs_bindex_t nelm;
-+ struct au_drinfo_rev_elm elm[0];
++ struct au_drinfo_rev_elm elm[];
+};
+
+/* todo: isn't it too large? */
+ err = 0;
+ if (!lkup->dirren.drinfo)
+ goto out;
-+ AuDebugOn(lkup->dirren.ninfo < btgt + 1);
-+ drinfo = lkup->dirren.drinfo[btgt + 1];
++ AuDebugOn(lkup->dirren.ninfo <= btgt);
++ drinfo = lkup->dirren.drinfo[btgt];
+ if (!drinfo)
+ goto out;
+
+ match = 1;
+ if (!lkup->dirren.drinfo)
+ goto out;
-+ AuDebugOn(lkup->dirren.ninfo < bindex + 1);
-+ drinfo = lkup->dirren.drinfo[bindex + 1];
++ AuDebugOn(lkup->dirren.ninfo <= bindex);
++ drinfo = lkup->dirren.drinfo[bindex];
+ if (!drinfo)
+ goto out;
+
+}
diff -urN /usr/share/empty/fs/aufs/dirren.h linux/fs/aufs/dirren.h
--- /usr/share/empty/fs/aufs/dirren.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/dirren.h 2019-07-11 15:42:14.462237786 +0200
++++ linux/fs/aufs/dirren.h 2021-05-02 20:15:14.673337458 +0200
@@ -0,0 +1,140 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2017-2019 Junjiro R. Okajima
++ * Copyright (C) 2017-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+#endif /* __AUFS_DIRREN_H__ */
diff -urN /usr/share/empty/fs/aufs/dynop.c linux/fs/aufs/dynop.c
--- /usr/share/empty/fs/aufs/dynop.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/dynop.c 2019-07-11 15:42:14.465571210 +0200
-@@ -0,0 +1,367 @@
++++ linux/fs/aufs/dynop.c 2021-05-02 20:15:14.673337458 +0200
+@@ -0,0 +1,368 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2010-2019 Junjiro R. Okajima
++ * Copyright (C) 2010-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ DySetAop(writepages);
+ DySetAop(set_page_dirty);
+ DySetAop(readpages);
++ DySetAop(readahead);
+ DySetAop(write_begin);
+ DySetAop(write_end);
+ DySetAop(bmap);
+}
diff -urN /usr/share/empty/fs/aufs/dynop.h linux/fs/aufs/dynop.h
--- /usr/share/empty/fs/aufs/dynop.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/dynop.h 2019-07-11 15:42:14.465571210 +0200
++++ linux/fs/aufs/dynop.h 2021-05-02 20:15:14.673337458 +0200
@@ -0,0 +1,77 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2010-2019 Junjiro R. Okajima
++ * Copyright (C) 2010-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+#endif /* __AUFS_DYNOP_H__ */
diff -urN /usr/share/empty/fs/aufs/export.c linux/fs/aufs/export.c
--- /usr/share/empty/fs/aufs/export.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/export.c 2019-07-11 15:42:14.465571210 +0200
-@@ -0,0 +1,838 @@
++++ linux/fs/aufs/export.c 2021-05-02 20:15:14.673337458 +0200
+@@ -0,0 +1,837 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ pos = inode->i_ino;
+ pos *= sizeof(igen);
+ igen = inode->i_generation + 1;
-+ sz = xino_fwrite(sbinfo->si_xwrite, sbinfo->si_xigen, &igen,
-+ sizeof(igen), &pos);
++ sz = xino_fwrite(sbinfo->si_xigen, &igen, sizeof(igen), &pos);
+ if (sz == sizeof(igen))
+ return; /* success */
+
+ if (vfsub_f_size_read(file)
+ < pos + sizeof(inode->i_generation)) {
+ inode->i_generation = atomic_inc_return(&sbinfo->si_xigen_next);
-+ sz = xino_fwrite(sbinfo->si_xwrite, file, &inode->i_generation,
++ sz = xino_fwrite(file, &inode->i_generation,
+ sizeof(inode->i_generation), &pos);
+ } else
-+ sz = xino_fread(sbinfo->si_xread, file, &inode->i_generation,
++ sz = xino_fread(file, &inode->i_generation,
+ sizeof(inode->i_generation), &pos);
+ if (sz == sizeof(inode->i_generation))
+ goto out; /* success */
+}
diff -urN /usr/share/empty/fs/aufs/fhsm.c linux/fs/aufs/fhsm.c
--- /usr/share/empty/fs/aufs/fhsm.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/fhsm.c 2019-07-11 15:42:14.465571210 +0200
++++ linux/fs/aufs/fhsm.c 2021-05-02 20:15:14.673337458 +0200
@@ -0,0 +1,427 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2011-2019 Junjiro R. Okajima
++ * Copyright (C) 2011-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+}
diff -urN /usr/share/empty/fs/aufs/file.c linux/fs/aufs/file.c
--- /usr/share/empty/fs/aufs/file.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/file.c 2019-07-11 15:42:14.465571210 +0200
++++ linux/fs/aufs/file.c 2021-05-02 20:15:14.673337458 +0200
@@ -0,0 +1,863 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+};
diff -urN /usr/share/empty/fs/aufs/file.h linux/fs/aufs/file.h
--- /usr/share/empty/fs/aufs/file.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/file.h 2019-07-11 15:42:14.465571210 +0200
++++ linux/fs/aufs/file.h 2021-05-02 20:15:14.673337458 +0200
@@ -0,0 +1,342 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+#endif /* __AUFS_FILE_H__ */
diff -urN /usr/share/empty/fs/aufs/finfo.c linux/fs/aufs/finfo.c
--- /usr/share/empty/fs/aufs/finfo.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/finfo.c 2019-07-11 15:42:14.465571210 +0200
++++ linux/fs/aufs/finfo.c 2021-05-02 20:15:14.673337458 +0200
@@ -0,0 +1,149 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+}
diff -urN /usr/share/empty/fs/aufs/f_op.c linux/fs/aufs/f_op.c
--- /usr/share/empty/fs/aufs/f_op.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/f_op.c 2019-07-11 15:42:14.465571210 +0200
-@@ -0,0 +1,819 @@
++++ linux/fs/aufs/f_op.c 2021-05-02 20:15:14.673337458 +0200
+@@ -0,0 +1,771 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ fput(h_file);
+}
+
-+static ssize_t aufs_read(struct file *file, char __user *buf, size_t count,
-+ loff_t *ppos)
-+{
-+ ssize_t err;
-+ struct inode *inode;
-+ struct file *h_file;
-+ struct super_block *sb;
-+
-+ inode = file_inode(file);
-+ sb = inode->i_sb;
-+ si_read_lock(sb, AuLock_FLUSH | AuLock_NOPLMW);
-+
-+ h_file = au_read_pre(file, /*keep_fi*/0, /*lsc*/0);
-+ err = PTR_ERR(h_file);
-+ if (IS_ERR(h_file))
-+ goto out;
-+
-+ /* filedata may be obsoleted by concurrent copyup, but no problem */
-+ err = vfsub_read_u(h_file, buf, count, ppos);
-+ /* todo: necessary? */
-+ /* file->f_ra = h_file->f_ra; */
-+ au_read_post(inode, h_file);
-+
-+out:
-+ si_read_unlock(sb);
-+ return err;
-+}
-+
+/*
+ * todo: very ugly
+ * it locks both of i_mutex and si_rwsem for read in safe.
+ }
+}
+
-+static ssize_t aufs_write(struct file *file, const char __user *ubuf,
-+ size_t count, loff_t *ppos)
-+{
-+ ssize_t err;
-+ struct au_write_pre wpre;
-+ struct inode *inode;
-+ struct file *h_file;
-+ char __user *buf = (char __user *)ubuf;
-+
-+ inode = file_inode(file);
-+ au_mtx_and_read_lock(inode);
-+
-+ wpre.lsc = 0;
-+ h_file = au_write_pre(file, /*do_ready*/1, &wpre);
-+ err = PTR_ERR(h_file);
-+ if (IS_ERR(h_file))
-+ goto out;
-+
-+ err = vfsub_write_u(h_file, buf, count, ppos);
-+ au_write_post(inode, h_file, &wpre, err);
-+
-+out:
-+ si_read_unlock(inode->i_sb);
-+ inode_unlock(inode);
-+ return err;
-+}
-+
+static ssize_t au_do_iter(struct file *h_file, int rw, struct kiocb *kio,
+ struct iov_iter *iov_iter)
+{
+ if (unlikely(err))
+ goto out;
+
-+ err = -ENOSYS;
++ err = -ENOSYS; /* the branch doesn't have its ->(read|write)_iter() */
+ iter = NULL;
+ if (rw == MAY_READ)
+ iter = h_file->f_op->read_iter;
+ return err;
+}
+
++/*
++ * We may be able to remove aufs_splice_{read,write}() since almost all FSes
++ * don't have their own .splice_{read,write} implimentations, and they use
++ * generic_file_splice_read() and iter_file_splice_write() who can act like the
++ * simple converters to f_op->iter_read() and ->iter_write().
++ * But we keep our own implementations because some non-mainlined FSes may have
++ * their own .splice_{read,write} implimentations and aufs doesn't want to take
++ * away an opportunity to co-work with aufs from them.
++ */
+static ssize_t aufs_splice_read(struct file *file, loff_t *ppos,
+ struct pipe_inode_info *pipe, size_t len,
+ unsigned int flags)
+/* ---------------------------------------------------------------------- */
+
+/* no one supports this operation, currently */
-+#if 0
++#if 0 /* reserved for future use */
+static ssize_t aufs_sendpage(struct file *file, struct page *page, int offset,
+ size_t len, loff_t *pos, int more)
+{
+
+ .llseek = default_llseek,
+
-+ .read = aufs_read,
-+ .write = aufs_write,
+ .read_iter = aufs_read_iter,
+ .write_iter = aufs_write_iter,
+
+ .setfl = aufs_setfl,
+ .splice_write = aufs_splice_write,
+ .splice_read = aufs_splice_read,
-+#if 0
++#if 0 /* reserved for future use */
+ .aio_splice_write = aufs_aio_splice_write,
+ .aio_splice_read = aufs_aio_splice_read,
+#endif
+};
diff -urN /usr/share/empty/fs/aufs/fstype.h linux/fs/aufs/fstype.h
--- /usr/share/empty/fs/aufs/fstype.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/fstype.h 2019-07-11 15:42:14.465571210 +0200
++++ linux/fs/aufs/fstype.h 2021-05-02 20:15:14.673337458 +0200
@@ -0,0 +1,401 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+#endif /* __AUFS_FSTYPE_H__ */
diff -urN /usr/share/empty/fs/aufs/hbl.h linux/fs/aufs/hbl.h
--- /usr/share/empty/fs/aufs/hbl.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/hbl.h 2019-07-11 15:42:14.465571210 +0200
++++ linux/fs/aufs/hbl.h 2021-05-02 20:15:14.673337458 +0200
@@ -0,0 +1,65 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2017-2019 Junjiro R. Okajima
++ * Copyright (C) 2017-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+#endif /* __AUFS_HBL_H__ */
diff -urN /usr/share/empty/fs/aufs/hfsnotify.c linux/fs/aufs/hfsnotify.c
--- /usr/share/empty/fs/aufs/hfsnotify.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/hfsnotify.c 2019-07-11 15:42:14.465571210 +0200
++++ linux/fs/aufs/hfsnotify.c 2021-05-02 20:15:14.673337458 +0200
@@ -0,0 +1,288 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+}
+
+static int au_hfsn_handle_event(struct fsnotify_group *group,
-+ struct inode *inode,
+ u32 mask, const void *data, int data_type,
++ struct inode *dir,
+ const struct qstr *file_name, u32 cookie,
+ struct fsnotify_iter_info *iter_info)
+{
+ if (mask & (FS_IN_IGNORED | FS_UNMOUNT))
+ goto out;
+
-+ h_dir = inode;
++ h_dir = dir;
+ h_inode = NULL;
+#ifdef AuDbgHnotify
+ au_debug_on();
+};
diff -urN /usr/share/empty/fs/aufs/hfsplus.c linux/fs/aufs/hfsplus.c
--- /usr/share/empty/fs/aufs/hfsplus.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/hfsplus.c 2019-07-11 15:42:14.465571210 +0200
++++ linux/fs/aufs/hfsplus.c 2021-05-02 20:15:14.673337458 +0200
@@ -0,0 +1,60 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2010-2019 Junjiro R. Okajima
++ * Copyright (C) 2010-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+}
diff -urN /usr/share/empty/fs/aufs/hnotify.c linux/fs/aufs/hnotify.c
--- /usr/share/empty/fs/aufs/hnotify.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/hnotify.c 2019-07-11 15:42:14.465571210 +0200
-@@ -0,0 +1,721 @@
++++ linux/fs/aufs/hnotify.c 2021-05-02 20:15:14.673337458 +0200
+@@ -0,0 +1,715 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+
+out_dpages:
+ au_dpages_free(&dpages);
-+
-+#if 0
-+ /* discard children */
-+ dentry_unhash(dentry);
-+ dput(dentry);
-+#endif
+out:
+ return err;
+}
+ case FS_MOVED_TO:
+ au_fset_hnjob(flags[AuHn_CHILD], XINO0);
+ au_fset_hnjob(flags[AuHn_CHILD], MNTPNT);
-+ /*FALLTHROUGH*/
++ fallthrough;
+ case FS_CREATE:
+ AuDebugOn(!h_child_name);
+ break;
+}
diff -urN /usr/share/empty/fs/aufs/iinfo.c linux/fs/aufs/iinfo.c
--- /usr/share/empty/fs/aufs/iinfo.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/iinfo.c 2019-07-11 15:42:14.468904634 +0200
++++ linux/fs/aufs/iinfo.c 2021-05-02 20:15:14.673337458 +0200
@@ -0,0 +1,286 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+}
diff -urN /usr/share/empty/fs/aufs/inode.c linux/fs/aufs/inode.c
--- /usr/share/empty/fs/aufs/inode.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/inode.c 2019-07-11 15:42:14.468904634 +0200
-@@ -0,0 +1,529 @@
++++ linux/fs/aufs/inode.c 2021-05-02 20:15:14.673337458 +0200
+@@ -0,0 +1,531 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ struct dentry *h_dentry;
+ struct inode *h_inode;
+ struct au_iinfo *iinfo;
-+ struct inode_operations *iop;
++ const struct inode_operations *iop;
+
+ IiMustWriteLock(inode);
+
+ return err;
+}
+
-+int au_test_h_perm(struct inode *h_inode, int mask)
++int au_test_h_perm(struct user_namespace *h_userns, struct inode *h_inode,
++ int mask)
+{
+ if (uid_eq(current_fsuid(), GLOBAL_ROOT_UID))
+ return 0;
-+ return inode_permission(h_inode, mask);
++ return inode_permission(h_userns, h_inode, mask);
+}
+
-+int au_test_h_perm_sio(struct inode *h_inode, int mask)
++int au_test_h_perm_sio(struct user_namespace *h_userns, struct inode *h_inode,
++ int mask)
+{
+ if (au_test_nfs(h_inode->i_sb)
+ && (mask & MAY_WRITE)
+ && S_ISDIR(h_inode->i_mode))
+ mask |= MAY_READ; /* force permission check */
-+ return au_test_h_perm(h_inode, mask);
++ return au_test_h_perm(h_userns, h_inode, mask);
+}
diff -urN /usr/share/empty/fs/aufs/inode.h linux/fs/aufs/inode.h
--- /usr/share/empty/fs/aufs/inode.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/inode.h 2019-07-11 15:42:14.468904634 +0200
-@@ -0,0 +1,698 @@
++++ linux/fs/aufs/inode.h 2021-05-02 20:15:14.673337458 +0200
+@@ -0,0 +1,705 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+struct inode *au_new_inode(struct dentry *dentry, int must_new);
+int au_test_ro(struct super_block *sb, aufs_bindex_t bindex,
+ struct inode *inode);
-+int au_test_h_perm(struct inode *h_inode, int mask);
-+int au_test_h_perm_sio(struct inode *h_inode, int mask);
++int au_test_h_perm(struct user_namespace *h_userns, struct inode *h_inode,
++ int mask);
++int au_test_h_perm_sio(struct user_namespace *h_userns, struct inode *h_inode,
++ int mask);
+
+static inline int au_wh_ino(struct super_block *sb, aufs_bindex_t bindex,
+ ino_t h_ino, unsigned int d_type, ino_t *ino)
+ AuIop_OTHER,
+ AuIop_Last
+};
-+extern struct inode_operations aufs_iop[AuIop_Last],
++extern struct inode_operations aufs_iop[AuIop_Last], /* not const */
+ aufs_iop_nogetattr[AuIop_Last];
+
+/* au_wr_dir flags */
+int au_pin_and_icpup(struct dentry *dentry, struct iattr *ia,
+ struct au_icpup_args *a);
+
-+int au_h_path_getattr(struct dentry *dentry, int force, struct path *h_path,
-+ int locked);
++int au_h_path_getattr(struct dentry *dentry, struct inode *inode, int force,
++ struct path *h_path, int locked);
+
+/* i_op_add.c */
+int au_may_add(struct dentry *dentry, aufs_bindex_t bindex,
+ struct dentry *h_parent, int isdir);
-+int aufs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode,
-+ dev_t dev);
-+int aufs_symlink(struct inode *dir, struct dentry *dentry, const char *symname);
-+int aufs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
-+ bool want_excl);
++int aufs_mknod(struct user_namespace *userns, struct inode *dir,
++ struct dentry *dentry, umode_t mode, dev_t dev);
++int aufs_symlink(struct user_namespace *userns, struct inode *dir,
++ struct dentry *dentry, const char *symname);
++int aufs_create(struct user_namespace *userns, struct inode *dir,
++ struct dentry *dentry, umode_t mode, bool want_excl);
+struct vfsub_aopen_args;
+int au_aopen_or_create(struct inode *dir, struct dentry *dentry,
+ struct vfsub_aopen_args *args);
-+int aufs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode);
++int aufs_tmpfile(struct user_namespace *userns, struct inode *dir,
++ struct dentry *dentry, umode_t mode);
+int aufs_link(struct dentry *src_dentry, struct inode *dir,
+ struct dentry *dentry);
-+int aufs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode);
++int aufs_mkdir(struct user_namespace *userns, struct inode *dir,
++ struct dentry *dentry, umode_t mode);
+
+/* i_op_del.c */
+int au_wr_dir_need_wh(struct dentry *dentry, int isdir, aufs_bindex_t *bcpup);
+
+/* i_op_ren.c */
+int au_wbr(struct dentry *dentry, aufs_bindex_t btgt);
-+int aufs_rename(struct inode *src_dir, struct dentry *src_dentry,
-+ struct inode *dir, struct dentry *dentry,
-+ unsigned int flags);
++int aufs_rename(struct user_namespace *userns,
++ struct inode *_src_dir, struct dentry *_src_dentry,
++ struct inode *_dst_dir, struct dentry *_dst_dentry,
++ unsigned int _flags);
+
+/* iinfo.c */
+struct inode *au_h_iptr(struct inode *inode, aufs_bindex_t bindex);
+
+#ifdef CONFIG_AUFS_XATTR
+/* xattr.c */
-+int au_cpup_xattr(struct dentry *h_dst, struct dentry *h_src, int ignore_flags,
++int au_cpup_xattr(struct path *h_dst, struct path *h_src, int ignore_flags,
+ unsigned int verbose);
+ssize_t aufs_listxattr(struct dentry *dentry, char *list, size_t size);
+void au_xattr_init(struct super_block *sb);
+#else
-+AuStubInt0(au_cpup_xattr, struct dentry *h_dst, struct dentry *h_src,
++AuStubInt0(au_cpup_xattr, struct path *h_dst, struct path *h_src,
+ int ignore_flags, unsigned int verbose);
+AuStubVoid(au_xattr_init, struct super_block *sb);
+#endif
+
+#ifdef CONFIG_FS_POSIX_ACL
+struct posix_acl *aufs_get_acl(struct inode *inode, int type);
-+int aufs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
++int aufs_set_acl(struct user_namespace *userns, struct inode *inode,
++ struct posix_acl *acl, int type);
+#endif
+
+#if IS_ENABLED(CONFIG_AUFS_XATTR) || IS_ENABLED(CONFIG_FS_POSIX_ACL)
+ int (*alloc)(struct au_hinode *hinode);
+
+ /*
-+ * if it returns true, the the caller should free hinode->hi_notify,
++ * if it returns true, the caller should free hinode->hi_notify,
+ * otherwise ->free() frees it.
+ */
+ int (*free)(struct au_hinode *hinode,
+#endif /* __AUFS_INODE_H__ */
diff -urN /usr/share/empty/fs/aufs/ioctl.c linux/fs/aufs/ioctl.c
--- /usr/share/empty/fs/aufs/ioctl.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/ioctl.c 2019-07-11 15:42:14.468904634 +0200
++++ linux/fs/aufs/ioctl.c 2021-05-02 20:15:14.673337458 +0200
@@ -0,0 +1,220 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+#endif
diff -urN /usr/share/empty/fs/aufs/i_op_add.c linux/fs/aufs/i_op_add.c
--- /usr/share/empty/fs/aufs/i_op_add.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/i_op_add.c 2019-07-11 15:42:14.468904634 +0200
-@@ -0,0 +1,936 @@
++++ linux/fs/aufs/i_op_add.c 2021-05-02 20:15:14.673337458 +0200
+@@ -0,0 +1,941 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ return err;
+}
+
-+int aufs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode,
-+ dev_t dev)
++int aufs_mknod(struct user_namespace *userns, struct inode *dir,
++ struct dentry *dentry, umode_t mode, dev_t dev)
+{
+ struct simple_arg arg = {
+ .type = Mknod,
+ return add_simple(dir, dentry, &arg);
+}
+
-+int aufs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
++int aufs_symlink(struct user_namespace *userns, struct inode *dir,
++ struct dentry *dentry, const char *symname)
+{
+ struct simple_arg arg = {
+ .type = Symlink,
+ return add_simple(dir, dentry, &arg);
+}
+
-+int aufs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
-+ bool want_excl)
++int aufs_create(struct user_namespace *userns, struct inode *dir,
++ struct dentry *dentry, umode_t mode, bool want_excl)
+{
+ struct simple_arg arg = {
+ .type = Creat,
+ return add_simple(dir, dentry, &arg);
+}
+
-+int aufs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
++int aufs_tmpfile(struct user_namespace *userns, struct inode *dir,
++ struct dentry *dentry, umode_t mode)
+{
+ int err;
+ aufs_bindex_t bindex;
+ struct dentry *parent, *h_parent, *h_dentry;
+ struct inode *h_dir, *inode;
+ struct vfsmount *h_mnt;
++ struct user_namespace *h_userns;
+ struct au_wr_dir_args wr_dir_args = {
+ .force_btgt = -1,
+ .flags = AuWrDir_TMPFILE
+ if (unlikely(err))
+ goto out_parent;
+
++ h_userns = mnt_user_ns(h_mnt);
+ h_parent = au_h_dptr(parent, bindex);
-+ h_dentry = vfs_tmpfile(h_parent, mode, /*open_flag*/0);
++ h_dentry = vfs_tmpfile(h_userns, h_parent, mode, /*open_flag*/0);
+ if (IS_ERR(h_dentry)) {
+ err = PTR_ERR(h_dentry);
+ goto out_mnt;
+ return err;
+}
+
-+int aufs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
++int aufs_mkdir(struct user_namespace *userns, struct inode *dir,
++ struct dentry *dentry, umode_t mode)
+{
+ int err, rerr;
+ aufs_bindex_t bindex;
+}
diff -urN /usr/share/empty/fs/aufs/i_op.c linux/fs/aufs/i_op.c
--- /usr/share/empty/fs/aufs/i_op.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/i_op.c 2019-09-16 09:38:43.216175640 +0200
-@@ -0,0 +1,1505 @@
++++ linux/fs/aufs/i_op.c 2021-05-02 20:15:14.673337458 +0200
+@@ -0,0 +1,1513 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+{
+ int err;
+ const unsigned char write_mask = !!(mask & (MAY_WRITE | MAY_APPEND));
++ struct user_namespace *h_userns;
+
+ err = -EPERM;
+ if (write_mask && IS_IMMUTABLE(h_inode))
+ * - nfs always sets SB_POSIXACL regardless its mount option 'noacl.'
+ * in this case, generic_permission() returns -EOPNOTSUPP.
+ */
++ h_userns = mnt_user_ns(h_path->mnt);
+ if ((write_mask && !au_br_writable(brperm))
+ || (au_test_nfs(h_inode->i_sb) && S_ISDIR(h_inode->i_mode)
+ && write_mask && !(mask & MAY_READ))
+ || !h_inode->i_op->permission) {
+ /* AuLabel(generic_permission); */
+ /* AuDbg("get_acl %ps\n", h_inode->i_op->get_acl); */
-+ err = generic_permission(h_inode, mask);
++ err = generic_permission(h_userns, h_inode, mask);
+ if (err == -EOPNOTSUPP && au_test_nfs_noacl(h_inode))
-+ err = h_inode->i_op->permission(h_inode, mask);
++ err = h_inode->i_op->permission(h_userns, h_inode,
++ mask);
+ AuTraceErr(err);
+ } else {
+ /* AuLabel(h_inode->permission); */
-+ err = h_inode->i_op->permission(h_inode, mask);
++ err = h_inode->i_op->permission(h_userns, h_inode, mask);
+ AuTraceErr(err);
+ }
+
+ if (!err)
+ err = security_inode_permission(h_inode, mask);
+
-+#if 0
-+ if (!err) {
-+ /* todo: do we need to call ima_path_check()? */
-+ struct path h_path = {
-+ .dentry =
-+ .mnt = h_mnt
-+ };
-+ err = ima_path_check(&h_path,
-+ mask & (MAY_READ | MAY_WRITE | MAY_EXEC),
-+ IMA_COUNT_LEAVE);
-+ }
-+#endif
-+
+out:
+ return err;
+}
+
-+static int aufs_permission(struct inode *inode, int mask)
++static int aufs_permission(struct user_namespace *userns, struct inode *inode,
++ int mask)
+{
+ int err;
+ aufs_bindex_t bindex, bbot;
+ sb = inode->i_sb;
+ si_read_lock(sb, AuLock_FLUSH);
+ ii_read_lock_child(inode);
-+#if 0
++#if 0 /* reserved for future use */
++ /*
++ * This test may be rather 'too much' since the test is essentially done
++ * in the aufs_lookup(). Theoretically it is possible that the inode
++ * generation doesn't match to the superblock's here. But it isn't a
++ * big deal I suppose.
++ */
+ err = au_iigen_test(inode, au_sigen(sb));
+ if (unlikely(err))
+ goto out;
+ if (inode)
+ atomic_inc(&inode->i_count);
+ ret = d_splice_alias(inode, dentry);
-+#if 0
++#if 0 /* reserved for future use */
+ if (unlikely(d_need_lookup(dentry))) {
+ spin_lock(&dentry->d_lock);
+ dentry->d_flags &= ~DCACHE_NEED_LOOKUP;
+{
+ if (p->hdir) {
+ au_pin_hdir_set_owner(p, p->task);
-+ rwsem_release(&p->hdir->hi_inode->i_rwsem.dep_map, 1, _RET_IP_);
++ rwsem_release(&p->hdir->hi_inode->i_rwsem.dep_map, _RET_IP_);
+ }
+}
+
+ return err;
+}
+
-+static int aufs_setattr(struct dentry *dentry, struct iattr *ia)
++static int aufs_setattr(struct user_namespace *userns, struct dentry *dentry,
++ struct iattr *ia)
+{
+ int err;
+ struct inode *inode, *delegated;
+ struct super_block *sb;
+ struct file *file;
+ struct au_icpup_args *a;
++ struct user_namespace *h_userns;
+
+ inode = d_inode(dentry);
+ IMustLock(inode);
+
-+ err = setattr_prepare(dentry, ia);
++ err = setattr_prepare(userns, dentry, ia);
+ if (unlikely(err))
+ goto out;
+
+ * regardless aufs 'acl' option setting.
+ * why don't all acl-aware fs call this func from their ->setattr()?
+ */
-+ if (!err && (ia->ia_valid & ATTR_MODE))
-+ err = vfsub_acl_chmod(a->h_inode, ia->ia_mode);
++ if (!err && (ia->ia_valid & ATTR_MODE)) {
++ h_userns = mnt_user_ns(a->h_path.mnt);
++ err = vfsub_acl_chmod(h_userns, a->h_inode, ia->ia_mode);
++ }
+ if (!err)
+ au_cpup_attr_changeable(inode);
+
+ struct super_block *sb;
+ struct au_icpup_args *a;
+ struct inode *h_inode;
++ struct user_namespace *h_userns;
+
+ IMustLock(inode);
+
+ err = au_h_path_to_set_attr(dentry, a, &h_path);
+ if (unlikely(err))
+ goto out_di;
++ h_userns = mnt_user_ns(h_path.mnt);
+
+ inode_unlock(a->h_inode);
+ switch (arg->type) {
+ case AU_XATTR_SET:
+ AuDebugOn(d_is_negative(h_path.dentry));
-+ err = vfsub_setxattr(h_path.dentry,
++ err = vfsub_setxattr(h_userns, h_path.dentry,
+ arg->u.set.name, arg->u.set.value,
+ arg->u.set.size, arg->u.set.flags);
+ break;
+ case AU_ACL_SET:
+ err = -EOPNOTSUPP;
+ h_inode = d_inode(h_path.dentry);
-+ if (h_inode->i_op->set_acl)
++ if (h_inode->i_op->set_acl) {
+ /* this will call posix_acl_update_mode */
-+ err = h_inode->i_op->set_acl(h_inode,
++ err = h_inode->i_op->set_acl(h_userns, h_inode,
+ arg->u.acl_set.acl,
+ arg->u.acl_set.type);
++ }
+ break;
+ }
+ if (!err)
+ * returns zero or negative (an error).
+ * @dentry will be read-locked in success.
+ */
-+int au_h_path_getattr(struct dentry *dentry, int force, struct path *h_path,
-+ int locked)
++int au_h_path_getattr(struct dentry *dentry, struct inode *inode, int force,
++ struct path *h_path, int locked)
+{
+ int err;
+ unsigned int mnt_flags, sigen;
+ unsigned char udba_none;
+ aufs_bindex_t bindex;
+ struct super_block *sb, *h_sb;
-+ struct inode *inode;
+
+ h_path->mnt = NULL;
+ h_path->dentry = NULL;
+ di_read_lock_child(dentry, AuLock_IR);
+
+body:
-+ inode = d_inode(dentry);
++ if (!inode) {
++ inode = d_inode(dentry);
++ if (unlikely(!inode))
++ goto out;
++ }
+ bindex = au_ibtop(inode);
+ h_path->mnt = au_sbr_mnt(sb, bindex);
+ h_sb = h_path->mnt->mnt_sb;
+ return err;
+}
+
-+static int aufs_getattr(const struct path *path, struct kstat *st,
-+ u32 request, unsigned int query)
++static int aufs_getattr(struct user_namespace *userns, const struct path *path,
++ struct kstat *st, u32 request, unsigned int query)
+{
+ int err;
+ unsigned char positive;
+ err = si_read_lock(sb, AuLock_FLUSH | AuLock_NOPLM);
+ if (unlikely(err))
+ goto out;
-+ err = au_h_path_getattr(dentry, /*force*/0, &h_path, /*locked*/0);
++ err = au_h_path_getattr(dentry, /*inode*/NULL, /*force*/0, &h_path,
++ /*locked*/0);
+ if (unlikely(err))
+ goto out_si;
+ if (unlikely(!h_path.dentry))
+ goto out_di;
+
+out_fill:
-+ generic_fillattr(inode, st);
++ generic_fillattr(userns, inode, st);
+out_di:
+ di_read_unlock(dentry, AuLock_IR);
+out_si:
+};
diff -urN /usr/share/empty/fs/aufs/i_op_del.c linux/fs/aufs/i_op_del.c
--- /usr/share/empty/fs/aufs/i_op_del.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/i_op_del.c 2019-07-11 15:42:14.468904634 +0200
-@@ -0,0 +1,513 @@
++++ linux/fs/aufs/i_op_del.c 2021-05-02 20:15:14.673337458 +0200
+@@ -0,0 +1,515 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ umode_t h_mode;
+ struct dentry *h_dentry, *h_latest;
+ struct inode *h_inode;
++ struct user_namespace *h_userns;
+
+ h_dentry = au_h_dptr(dentry, bindex);
+ if (d_really_is_positive(dentry)) {
+ * let's try heavy test.
+ */
+ err = -EACCES;
++ h_userns = au_sbr_userns(dentry->d_sb, bindex);
+ if (unlikely(!au_opt_test(au_mntflags(dentry->d_sb), DIRPERM1)
-+ && au_test_h_perm(d_inode(h_parent),
++ && au_test_h_perm(h_userns, d_inode(h_parent),
+ MAY_EXEC | MAY_WRITE)))
+ goto out;
+
-+ h_latest = au_sio_lkup_one(&dentry->d_name, h_parent);
++ h_latest = au_sio_lkup_one(h_userns, &dentry->d_name, h_parent);
+ err = -EIO;
+ if (IS_ERR(h_latest))
+ goto out;
+}
diff -urN /usr/share/empty/fs/aufs/i_op_ren.c linux/fs/aufs/i_op_ren.c
--- /usr/share/empty/fs/aufs/i_op_ren.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/i_op_ren.c 2019-07-11 15:42:14.468904634 +0200
-@@ -0,0 +1,1250 @@
++++ linux/fs/aufs/i_op_ren.c 2021-05-02 20:15:14.673337458 +0200
+@@ -0,0 +1,1251 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ }
+
+ BUG_ON(d_is_positive(a->dst_h_dentry) && a->src_btop != a->btgt);
-+#if 0
++#if 0 /* debugging */
+ BUG_ON(!au_ftest_ren(a->auren_flags, DIRREN)
+ && d_is_positive(a->dst_h_dentry)
+ && a->src_btop != a->btgt);
+
+/* ---------------------------------------------------------------------- */
+
-+int aufs_rename(struct inode *_src_dir, struct dentry *_src_dentry,
++int aufs_rename(struct user_namespace *userns,
++ struct inode *_src_dir, struct dentry *_src_dentry,
+ struct inode *_dst_dir, struct dentry *_dst_dentry,
+ unsigned int _flags)
+{
+}
diff -urN /usr/share/empty/fs/aufs/Kconfig linux/fs/aufs/Kconfig
--- /usr/share/empty/fs/aufs/Kconfig 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/Kconfig 2019-07-11 15:42:14.458904362 +0200
++++ linux/fs/aufs/Kconfig 2021-05-02 20:15:14.670004120 +0200
@@ -0,0 +1,199 @@
+# SPDX-License-Identifier: GPL-2.0
+config AUFS_FS
+endif
diff -urN /usr/share/empty/fs/aufs/lcnt.h linux/fs/aufs/lcnt.h
--- /usr/share/empty/fs/aufs/lcnt.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/lcnt.h 2019-07-11 15:42:14.468904634 +0200
++++ linux/fs/aufs/lcnt.h 2021-05-02 20:15:14.673337458 +0200
@@ -0,0 +1,186 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2018-2019 Junjiro R. Okajima
++ * Copyright (C) 2018-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+#endif /* __AUFS_LCNT_H__ */
diff -urN /usr/share/empty/fs/aufs/loop.c linux/fs/aufs/loop.c
--- /usr/share/empty/fs/aufs/loop.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/loop.c 2019-07-11 15:42:14.468904634 +0200
++++ linux/fs/aufs/loop.c 2021-05-02 20:15:14.673337458 +0200
@@ -0,0 +1,148 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+}
diff -urN /usr/share/empty/fs/aufs/loop.h linux/fs/aufs/loop.h
--- /usr/share/empty/fs/aufs/loop.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/loop.h 2019-07-11 15:42:14.468904634 +0200
++++ linux/fs/aufs/loop.h 2021-05-02 20:15:14.673337458 +0200
@@ -0,0 +1,55 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+#endif /* __AUFS_LOOP_H__ */
diff -urN /usr/share/empty/fs/aufs/magic.mk linux/fs/aufs/magic.mk
--- /usr/share/empty/fs/aufs/magic.mk 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/magic.mk 2019-07-11 15:42:14.468904634 +0200
++++ linux/fs/aufs/magic.mk 2021-05-02 20:15:14.673337458 +0200
@@ -0,0 +1,31 @@
+# SPDX-License-Identifier: GPL-2.0
+
+endif
diff -urN /usr/share/empty/fs/aufs/Makefile linux/fs/aufs/Makefile
--- /usr/share/empty/fs/aufs/Makefile 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/Makefile 2019-07-11 15:42:14.462237786 +0200
++++ linux/fs/aufs/Makefile 2021-05-02 20:15:14.670004120 +0200
@@ -0,0 +1,46 @@
+# SPDX-License-Identifier: GPL-2.0
+
+aufs-$(CONFIG_AUFS_MAGIC_SYSRQ) += sysrq.o
diff -urN /usr/share/empty/fs/aufs/module.c linux/fs/aufs/module.c
--- /usr/share/empty/fs/aufs/module.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/module.c 2019-07-11 15:42:14.468904634 +0200
++++ linux/fs/aufs/module.c 2021-05-02 20:15:14.673337458 +0200
@@ -0,0 +1,273 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+module_exit(aufs_exit);
diff -urN /usr/share/empty/fs/aufs/module.h linux/fs/aufs/module.h
--- /usr/share/empty/fs/aufs/module.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/module.h 2019-07-11 15:42:14.468904634 +0200
++++ linux/fs/aufs/module.h 2021-05-02 20:15:14.673337458 +0200
@@ -0,0 +1,166 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+#endif /* __AUFS_MODULE_H__ */
diff -urN /usr/share/empty/fs/aufs/mvdown.c linux/fs/aufs/mvdown.c
--- /usr/share/empty/fs/aufs/mvdown.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/mvdown.c 2019-07-11 15:42:14.472238057 +0200
++++ linux/fs/aufs/mvdown.c 2021-05-02 20:15:14.673337458 +0200
@@ -0,0 +1,706 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2011-2019 Junjiro R. Okajima
++ * Copyright (C) 2011-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+}
diff -urN /usr/share/empty/fs/aufs/opts.c linux/fs/aufs/opts.c
--- /usr/share/empty/fs/aufs/opts.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/opts.c 2019-09-16 09:38:43.216175640 +0200
++++ linux/fs/aufs/opts.c 2021-05-02 20:15:14.676670793 +0200
@@ -0,0 +1,1880 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ err = e;
+ break;
+ }
-+ /*FALLTHROUGH*/
++ fallthrough;
+ case AuWbrCreate_MFS:
+ case AuWbrCreate_PMFS:
+ create->mfs_second = AUFS_MFS_DEF_SEC;
+
+ case Opt_ignore:
+ pr_warn("ignored %s\n", opt_str);
-+ /*FALLTHROUGH*/
++ fallthrough;
+ case Opt_ignore_silent:
+ skipped = 1;
+ err = 0;
+ case AuWbrCreate_PMFSRR:
+ case AuWbrCreate_PMFSRRV:
+ sbinfo->si_wbr_mfs.mfsrr_watermark = create->mfsrr_watermark;
-+ /*FALLTHROUGH*/
++ fallthrough;
+ case AuWbrCreate_MFS:
+ case AuWbrCreate_MFSV:
+ case AuWbrCreate_PMFS:
+ /* Always goto add, not fallthrough */
+ case Opt_prepend:
+ opt->add.bindex = 0;
-+ /* fallthrough */
++ fallthrough;
+ add: /* indented label */
+ case Opt_add:
+ err = au_br_add(sb, &opt->add,
+ if ((br->br_perm & AuBrAttr_ICEX)
+ && !h_dir->i_op->listxattr)
+ br->br_perm &= ~AuBrAttr_ICEX;
-+#if 0
++#if 0 /* untested */
+ if ((br->br_perm & AuBrAttr_ICEX_SEC)
+ && (au_br_sb(br)->s_flags & SB_NOSEC))
+ br->br_perm &= ~AuBrAttr_ICEX_SEC;
+}
diff -urN /usr/share/empty/fs/aufs/opts.h linux/fs/aufs/opts.h
--- /usr/share/empty/fs/aufs/opts.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/opts.h 2019-07-11 15:42:14.472238057 +0200
++++ linux/fs/aufs/opts.h 2021-05-02 20:15:14.676670793 +0200
@@ -0,0 +1,225 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+#endif /* __AUFS_OPTS_H__ */
diff -urN /usr/share/empty/fs/aufs/plink.c linux/fs/aufs/plink.c
--- /usr/share/empty/fs/aufs/plink.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/plink.c 2019-07-11 15:42:14.472238057 +0200
++++ linux/fs/aufs/plink.c 2021-05-02 20:15:14.676670793 +0200
@@ -0,0 +1,516 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+}
diff -urN /usr/share/empty/fs/aufs/poll.c linux/fs/aufs/poll.c
--- /usr/share/empty/fs/aufs/poll.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/poll.c 2019-07-11 15:42:14.472238057 +0200
++++ linux/fs/aufs/poll.c 2021-05-02 20:15:14.676670793 +0200
@@ -0,0 +1,51 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+}
diff -urN /usr/share/empty/fs/aufs/posix_acl.c linux/fs/aufs/posix_acl.c
--- /usr/share/empty/fs/aufs/posix_acl.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/posix_acl.c 2019-07-11 15:42:14.472238057 +0200
-@@ -0,0 +1,103 @@
++++ linux/fs/aufs/posix_acl.c 2021-05-02 20:15:14.676670793 +0200
+@@ -0,0 +1,106 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2014-2019 Junjiro R. Okajima
++ * Copyright (C) 2014-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+
+ /* always topmost only */
+ acl = get_acl(h_inode, type);
-+ if (!IS_ERR_OR_NULL(acl))
++ if (IS_ERR(acl))
++ forget_cached_acl(inode, type);
++ else
+ set_cached_acl(inode, type, acl);
+
+out:
+ return acl;
+}
+
-+int aufs_set_acl(struct inode *inode, struct posix_acl *acl, int type)
++int aufs_set_acl(struct user_namespace *userns, struct inode *inode,
++ struct posix_acl *acl, int type)
+{
+ int err;
+ ssize_t ssz;
+ }
+
+ ssz = au_sxattr(dentry, inode, &arg);
++ /* forget even it if succeeds since the branch might set differently */
++ forget_cached_acl(inode, type);
+ dput(dentry);
+ err = ssz;
-+ if (ssz >= 0) {
++ if (ssz >= 0)
+ err = 0;
-+ set_cached_acl(inode, type, acl);
-+ }
+
+out:
+ return err;
+}
diff -urN /usr/share/empty/fs/aufs/procfs.c linux/fs/aufs/procfs.c
--- /usr/share/empty/fs/aufs/procfs.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/procfs.c 2019-07-11 15:42:14.472238057 +0200
-@@ -0,0 +1,171 @@
++++ linux/fs/aufs/procfs.c 2021-05-02 20:15:14.676670793 +0200
+@@ -0,0 +1,170 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2010-2019 Junjiro R. Okajima
++ * Copyright (C) 2010-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ return err;
+}
+
-+static const struct file_operations au_procfs_plm_fop = {
-+ .write = au_procfs_plm_write,
-+ .release = au_procfs_plm_release,
-+ .owner = THIS_MODULE
++static const struct proc_ops au_procfs_plm_op = {
++ .proc_write = au_procfs_plm_write,
++ .proc_release = au_procfs_plm_release
+};
+
+/* ---------------------------------------------------------------------- */
+ goto out;
+
+ entry = proc_create(AUFS_PLINK_MAINT_NAME, S_IFREG | 0200,
-+ au_procfs_dir, &au_procfs_plm_fop);
++ au_procfs_dir, &au_procfs_plm_op);
+ if (unlikely(!entry))
+ goto out_dir;
+
+}
diff -urN /usr/share/empty/fs/aufs/rdu.c linux/fs/aufs/rdu.c
--- /usr/share/empty/fs/aufs/rdu.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/rdu.c 2019-07-11 15:42:14.472238057 +0200
++++ linux/fs/aufs/rdu.c 2021-05-02 20:15:14.676670793 +0200
@@ -0,0 +1,384 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+#endif
diff -urN /usr/share/empty/fs/aufs/rwsem.h linux/fs/aufs/rwsem.h
--- /usr/share/empty/fs/aufs/rwsem.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/rwsem.h 2019-07-11 15:42:14.472238057 +0200
-@@ -0,0 +1,73 @@
++++ linux/fs/aufs/rwsem.h 2021-05-02 20:15:14.676670793 +0200
+@@ -0,0 +1,85 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+
+/* to debug easier, do not make them inlined functions */
+#define AuRwMustNoWaiters(rw) AuDebugOn(rwsem_is_contended(rw))
++
++#ifdef CONFIG_LOCKDEP
+/* rwsem_is_locked() is unusable */
-+#define AuRwMustReadLock(rw) AuDebugOn(!lockdep_recursing(current) \
-+ && debug_locks \
++#define AuRwMustReadLock(rw) AuDebugOn(IS_ENABLED(CONFIG_LOCKDEP) \
++ && !lockdep_recursing(current) \
++ && debug_locks \
+ && !lockdep_is_held_type(rw, 1))
-+#define AuRwMustWriteLock(rw) AuDebugOn(!lockdep_recursing(current) \
-+ && debug_locks \
++#define AuRwMustWriteLock(rw) AuDebugOn(IS_ENABLED(CONFIG_LOCKDEP) \
++ && !lockdep_recursing(current) \
++ && debug_locks \
+ && !lockdep_is_held_type(rw, 0))
-+#define AuRwMustAnyLock(rw) AuDebugOn(!lockdep_recursing(current) \
-+ && debug_locks \
++#define AuRwMustAnyLock(rw) AuDebugOn(IS_ENABLED(CONFIG_LOCKDEP) \
++ && !lockdep_recursing(current) \
++ && debug_locks \
+ && !lockdep_is_held(rw))
-+#define AuRwDestroy(rw) AuDebugOn(!lockdep_recursing(current) \
-+ && debug_locks \
++#define AuRwDestroy(rw) AuDebugOn(IS_ENABLED(CONFIG_LOCKDEP) \
++ && !lockdep_recursing(current) \
++ && debug_locks \
+ && lockdep_is_held(rw))
++#else
++#define AuRwMustReadLock(rw) do {} while (0)
++#define AuRwMustWriteLock(rw) do {} while (0)
++#define AuRwMustAnyLock(rw) do {} while (0)
++#define AuRwDestroy(rw) do {} while (0)
++#endif
+
+#define au_rw_init(rw) init_rwsem(rw)
+
+#endif /* __AUFS_RWSEM_H__ */
diff -urN /usr/share/empty/fs/aufs/sbinfo.c linux/fs/aufs/sbinfo.c
--- /usr/share/empty/fs/aufs/sbinfo.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/sbinfo.c 2019-07-11 15:42:14.472238057 +0200
++++ linux/fs/aufs/sbinfo.c 2021-05-02 20:15:14.676670793 +0200
@@ -0,0 +1,314 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+}
diff -urN /usr/share/empty/fs/aufs/super.c linux/fs/aufs/super.c
--- /usr/share/empty/fs/aufs/super.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/super.c 2019-07-11 15:42:14.472238057 +0200
-@@ -0,0 +1,1047 @@
++++ linux/fs/aufs/super.c 2021-05-02 20:15:14.676670793 +0200
+@@ -0,0 +1,1050 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ sb = dentry->d_sb;
+ if (sb->s_flags & SB_POSIXACL)
+ seq_puts(m, ",acl");
-+#if 0
++#if 0 /* reserved for future use */
+ if (sb->s_flags & SB_I_VERSION)
+ seq_puts(m, ",i_version");
+#endif
+struct file_system_type aufs_fs_type = {
+ .name = AUFS_FSTYPE,
+ /* a race between rename and others */
-+ .fs_flags = FS_RENAME_DOES_D_MOVE,
++ .fs_flags = FS_RENAME_DOES_D_MOVE
++ /* untested */
++ /*| FS_ALLOW_IDMAP*/
++ ,
+ .mount = aufs_mount,
+ .kill_sb = aufs_kill_sb,
+ /* no need to __module_get() and module_put(). */
+};
diff -urN /usr/share/empty/fs/aufs/super.h linux/fs/aufs/super.h
--- /usr/share/empty/fs/aufs/super.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/super.h 2019-07-11 15:42:14.472238057 +0200
-@@ -0,0 +1,589 @@
++++ linux/fs/aufs/super.h 2021-05-02 20:15:14.676670793 +0200
+@@ -0,0 +1,587 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ unsigned int si_mntflags;
+
+ /* external inode number (bitmap and translation table) */
-+ vfs_readf_t si_xread;
-+ vfs_writef_t si_xwrite;
+ loff_t si_ximaxent; /* max entries in a xino */
+
+ struct file *si_xib;
+ struct hlist_bl_head si_files;
+
+ /* with/without getattr, brother of sb->s_d_op */
-+ struct inode_operations *si_iop_array;
++ const struct inode_operations *si_iop_array;
+
+ /*
+ * sysfs and lifetime management.
+#endif /* __AUFS_SUPER_H__ */
diff -urN /usr/share/empty/fs/aufs/sysaufs.c linux/fs/aufs/sysaufs.c
--- /usr/share/empty/fs/aufs/sysaufs.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/sysaufs.c 2019-07-11 15:42:14.472238057 +0200
++++ linux/fs/aufs/sysaufs.c 2021-05-02 20:15:14.676670793 +0200
@@ -0,0 +1,93 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+}
diff -urN /usr/share/empty/fs/aufs/sysaufs.h linux/fs/aufs/sysaufs.h
--- /usr/share/empty/fs/aufs/sysaufs.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/sysaufs.h 2019-07-11 15:42:14.475571481 +0200
++++ linux/fs/aufs/sysaufs.h 2021-05-02 20:15:14.676670793 +0200
@@ -0,0 +1,102 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+#endif /* __SYSAUFS_H__ */
diff -urN /usr/share/empty/fs/aufs/sysfs.c linux/fs/aufs/sysfs.c
--- /usr/share/empty/fs/aufs/sysfs.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/sysfs.c 2019-07-11 15:42:14.475571481 +0200
++++ linux/fs/aufs/sysfs.c 2021-05-02 20:15:14.676670793 +0200
@@ -0,0 +1,374 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+}
diff -urN /usr/share/empty/fs/aufs/sysrq.c linux/fs/aufs/sysrq.c
--- /usr/share/empty/fs/aufs/sysrq.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/sysrq.c 2019-07-11 15:42:14.475571481 +0200
-@@ -0,0 +1,160 @@
++++ linux/fs/aufs/sysrq.c 2021-05-02 20:15:14.676670793 +0200
+@@ -0,0 +1,149 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ struct hlist_bl_head *files;
+ struct hlist_bl_node *pos;
+ struct au_finfo *finfo;
++ struct inode *i;
+
+ plevel = au_plevel;
+ au_plevel = KERN_WARNING;
+ pr("superblock\n");
+ au_dpri_sb(sb);
+
-+#if 0
-+ pr("root dentry\n");
-+ au_dpri_dentry(sb->s_root);
-+ pr("root inode\n");
-+ au_dpri_inode(d_inode(sb->s_root));
-+#endif
-+
-+#if 0
++#if 0 /* reserved */
+ do {
+ int err, i, j, ndentry;
+ struct au_dcsub_pages dpages;
+ } while (0);
+#endif
+
-+#if 1
-+ {
-+ struct inode *i;
-+
-+ pr("isolated inode\n");
-+ spin_lock(&sb->s_inode_list_lock);
-+ list_for_each_entry(i, &sb->s_inodes, i_sb_list) {
-+ spin_lock(&i->i_lock);
-+ if (1 || hlist_empty(&i->i_dentry))
-+ au_dpri_inode(i);
-+ spin_unlock(&i->i_lock);
-+ }
-+ spin_unlock(&sb->s_inode_list_lock);
++ pr("isolated inode\n");
++ spin_lock(&sb->s_inode_list_lock);
++ list_for_each_entry(i, &sb->s_inodes, i_sb_list) {
++ spin_lock(&i->i_lock);
++ if (hlist_empty(&i->i_dentry))
++ au_dpri_inode(i);
++ spin_unlock(&i->i_lock);
+ }
-+#endif
++ spin_unlock(&sb->s_inode_list_lock);
++
+ pr("files\n");
+ files = &au_sbi(sb)->si_files;
+ hlist_bl_lock(files);
+}
diff -urN /usr/share/empty/fs/aufs/vdir.c linux/fs/aufs/vdir.c
--- /usr/share/empty/fs/aufs/vdir.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/vdir.c 2019-07-11 15:42:14.475571481 +0200
++++ linux/fs/aufs/vdir.c 2021-05-02 20:15:14.676670793 +0200
@@ -0,0 +1,896 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+
+static void nhash_count(struct hlist_head *head)
+{
-+#if 0
++#if 0 /* debugging */
+ unsigned long n;
+ struct hlist_node *pos;
+
+}
diff -urN /usr/share/empty/fs/aufs/vfsub.c linux/fs/aufs/vfsub.c
--- /usr/share/empty/fs/aufs/vfsub.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/vfsub.c 2019-07-11 15:42:14.475571481 +0200
-@@ -0,0 +1,902 @@
++++ linux/fs/aufs/vfsub.c 2021-05-02 20:15:14.676670793 +0200
+@@ -0,0 +1,916 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+
+struct file *vfsub_dentry_open(struct path *path, int flags)
+{
-+ struct file *file;
-+
-+ file = dentry_open(path, flags /* | __FMODE_NONOTIFY */,
++ return dentry_open(path, flags /* | __FMODE_NONOTIFY */,
+ current_cred());
-+ if (!IS_ERR_OR_NULL(file)
-+ && (file->f_mode & (FMODE_READ | FMODE_WRITE)) == FMODE_READ)
-+ i_readcount_inc(d_inode(path->dentry));
-+
-+ return file;
+}
+
+struct file *vfsub_filp_open(const char *path, int oflags, int mode)
+{
+ int err;
+ struct dentry *d;
++ struct user_namespace *userns;
+
+ IMustLock(dir);
+
+ path->dentry = d;
+ if (unlikely(err))
+ goto out;
++ userns = mnt_user_ns(path->mnt);
+
+ lockdep_off();
-+ err = vfs_create(dir, path->dentry, mode, want_excl);
++ err = vfs_create(userns, dir, path->dentry, mode, want_excl);
+ lockdep_on();
+ if (!err) {
+ struct path tmp = *path;
+{
+ int err;
+ struct dentry *d;
++ struct user_namespace *userns;
+
+ IMustLock(dir);
+
+ path->dentry = d;
+ if (unlikely(err))
+ goto out;
++ userns = mnt_user_ns(path->mnt);
+
+ lockdep_off();
-+ err = vfs_symlink(dir, path->dentry, symname);
++ err = vfs_symlink(userns, dir, path->dentry, symname);
+ lockdep_on();
+ if (!err) {
+ struct path tmp = *path;
+{
+ int err;
+ struct dentry *d;
++ struct user_namespace *userns;
+
+ IMustLock(dir);
+
+ path->dentry = d;
+ if (unlikely(err))
+ goto out;
++ userns = mnt_user_ns(path->mnt);
+
+ lockdep_off();
-+ err = vfs_mknod(dir, path->dentry, mode, dev);
++ err = vfs_mknod(userns, dir, path->dentry, mode, dev);
+ lockdep_on();
+ if (!err) {
+ struct path tmp = *path;
+{
+ int err;
+ struct dentry *d;
++ struct user_namespace *userns;
+
+ IMustLock(dir);
+
+ path->dentry = d;
+ if (unlikely(err))
+ goto out;
++ userns = mnt_user_ns(path->mnt);
+
+ lockdep_off();
-+ err = vfs_link(src_dentry, dir, path->dentry, delegated_inode);
++ err = vfs_link(src_dentry, userns, dir, path->dentry, delegated_inode);
+ lockdep_on();
+ if (!err) {
+ struct path tmp = *path;
+ struct inode **delegated_inode, unsigned int flags)
+{
+ int err;
++ struct renamedata rd;
+ struct path tmp = {
+ .mnt = path->mnt
+ };
+ if (unlikely(err))
+ goto out;
+
++ rd.old_mnt_userns = mnt_user_ns(path->mnt);
++ rd.old_dir = src_dir;
++ rd.old_dentry = src_dentry;
++ rd.new_mnt_userns = rd.old_mnt_userns;
++ rd.new_dir = dir;
++ rd.new_dentry = path->dentry;
++ rd.delegated_inode = delegated_inode;
++ rd.flags = flags;
+ lockdep_off();
-+ err = vfs_rename(src_dir, src_dentry, dir, path->dentry,
-+ delegated_inode, flags);
++ err = vfs_rename(&rd);
+ lockdep_on();
+ if (!err) {
+ int did;
+{
+ int err;
+ struct dentry *d;
++ struct user_namespace *userns;
+
+ IMustLock(dir);
+
+ path->dentry = d;
+ if (unlikely(err))
+ goto out;
++ userns = mnt_user_ns(path->mnt);
+
+ lockdep_off();
-+ err = vfs_mkdir(dir, path->dentry, mode);
++ err = vfs_mkdir(userns, dir, path->dentry, mode);
+ lockdep_on();
+ if (!err) {
+ struct path tmp = *path;
+{
+ int err;
+ struct dentry *d;
++ struct user_namespace *userns;
+
+ IMustLock(dir);
+
+ path->dentry = d;
+ if (unlikely(err))
+ goto out;
++ userns = mnt_user_ns(path->mnt);
+
+ lockdep_off();
-+ err = vfs_rmdir(dir, path->dentry);
++ err = vfs_rmdir(userns, dir, path->dentry);
+ lockdep_on();
+ if (!err) {
+ struct path tmp = {
+ return err;
+}
+
-+/* todo: kernel_read()? */
+ssize_t vfsub_read_k(struct file *file, void *kbuf, size_t count,
+ loff_t *ppos)
+{
+ ssize_t err;
-+ mm_segment_t oldfs;
-+ union {
-+ void *k;
-+ char __user *u;
-+ } buf;
+
-+ buf.k = kbuf;
-+ oldfs = get_fs();
-+ set_fs(KERNEL_DS);
-+ err = vfsub_read_u(file, buf.u, count, ppos);
-+ set_fs(oldfs);
++ lockdep_off();
++ err = kernel_read(file, kbuf, count, ppos);
++ lockdep_on();
++ AuTraceErr(err);
++ if (err >= 0)
++ vfsub_update_h_iattr(&file->f_path, /*did*/NULL); /*ignore*/
+ return err;
+}
+
+ssize_t vfsub_write_k(struct file *file, void *kbuf, size_t count, loff_t *ppos)
+{
+ ssize_t err;
-+ mm_segment_t oldfs;
-+ union {
-+ void *k;
-+ const char __user *u;
-+ } buf;
+
-+ buf.k = kbuf;
-+ oldfs = get_fs();
-+ set_fs(KERNEL_DS);
-+ err = vfsub_write_u(file, buf.u, count, ppos);
-+ set_fs(oldfs);
++ lockdep_off();
++ err = kernel_write(file, kbuf, count, ppos);
++ lockdep_on();
++ if (err >= 0)
++ vfsub_update_h_iattr(&file->f_path, /*did*/NULL); /*ignore*/
+ return err;
+}
+
+ int err;
+ struct inode *h_inode;
+ struct super_block *h_sb;
++ struct user_namespace *h_userns;
+
+ if (!h_file) {
+ err = vfsub_truncate(h_path, length);
+ if (!err)
+ err = security_path_truncate(h_path);
+ if (!err) {
++ h_userns = mnt_user_ns(h_path->mnt);
+ lockdep_off();
-+ err = do_truncate(h_path->dentry, length, attr, h_file);
++ err = do_truncate(h_userns, h_path->dentry, length, attr,
++ h_file);
+ lockdep_on();
+ }
+ lockdep_off();
+int vfsub_sio_mkdir(struct inode *dir, struct path *path, int mode)
+{
+ int err, do_sio, wkq_err;
++ struct user_namespace *userns;
+
-+ do_sio = au_test_h_perm_sio(dir, MAY_EXEC | MAY_WRITE);
++ userns = mnt_user_ns(path->mnt);
++ do_sio = au_test_h_perm_sio(userns, dir, MAY_EXEC | MAY_WRITE);
+ if (!do_sio) {
+ lockdep_off();
+ err = vfsub_mkdir(dir, path, mode);
+int vfsub_sio_rmdir(struct inode *dir, struct path *path)
+{
+ int err, do_sio, wkq_err;
++ struct user_namespace *userns;
+
-+ do_sio = au_test_h_perm_sio(dir, MAY_EXEC | MAY_WRITE);
++ userns = mnt_user_ns(path->mnt);
++ do_sio = au_test_h_perm_sio(userns, dir, MAY_EXEC | MAY_WRITE);
+ if (!do_sio) {
+ lockdep_off();
+ err = vfsub_rmdir(dir, path);
+{
+ struct notify_change_args *a = args;
+ struct inode *h_inode;
++ struct user_namespace *userns;
+
+ h_inode = d_inode(a->path->dentry);
+ IMustLock(h_inode);
+
+ *a->errp = -EPERM;
+ if (!IS_IMMUTABLE(h_inode) && !IS_APPEND(h_inode)) {
++ userns = mnt_user_ns(a->path->mnt);
+ lockdep_off();
-+ *a->errp = notify_change(a->path->dentry, a->ia,
++ *a->errp = notify_change(userns, a->path->dentry, a->ia,
+ a->delegated_inode);
+ lockdep_on();
+ if (!*a->errp)
+ struct unlink_args *a = args;
+ struct dentry *d = a->path->dentry;
+ struct inode *h_inode;
++ struct user_namespace *userns;
+ const int stop_sillyrename = (au_test_nfs(d->d_sb)
+ && au_dcount(d) == 1);
+
+ ihold(h_inode);
+ }
+
++ userns = mnt_user_ns(a->path->mnt);
+ lockdep_off();
-+ *a->errp = vfs_unlink(a->dir, d, a->delegated_inode);
++ *a->errp = vfs_unlink(userns, a->dir, d, a->delegated_inode);
+ lockdep_on();
+ if (!*a->errp) {
+ struct path tmp = {
+}
diff -urN /usr/share/empty/fs/aufs/vfsub.h linux/fs/aufs/vfsub.h
--- /usr/share/empty/fs/aufs/vfsub.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/vfsub.h 2019-07-11 15:42:14.475571481 +0200
-@@ -0,0 +1,354 @@
++++ linux/fs/aufs/vfsub.h 2021-05-02 20:15:14.676670793 +0200
+@@ -0,0 +1,358 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+}
+
+#ifdef CONFIG_FS_POSIX_ACL
-+static inline int vfsub_acl_chmod(struct inode *h_inode, umode_t h_mode)
++static inline int vfsub_acl_chmod(struct user_namespace *h_userns,
++ struct inode *h_inode, umode_t h_mode)
+{
+ int err;
+
-+ err = posix_acl_chmod(h_inode, h_mode);
++ err = posix_acl_chmod(h_userns, h_inode, h_mode);
+ if (err == -EOPNOTSUPP)
+ err = 0;
+ return err;
+}
+#else
-+AuStubInt0(vfsub_acl_chmod, struct inode *h_inode, umode_t h_mode);
++AuStubInt0(vfsub_acl_chmod, struct user_namespace *h_userns,
++ struct inode *h_inode, umode_t h_mode);
+#endif
+
+long vfsub_splice_to(struct file *in, loff_t *ppos,
+
+/* ---------------------------------------------------------------------- */
+
-+static inline int vfsub_setxattr(struct dentry *dentry, const char *name,
++static inline int vfsub_setxattr(struct user_namespace *userns,
++ struct dentry *dentry, const char *name,
+ const void *value, size_t size, int flags)
+{
+ int err;
+
+ lockdep_off();
-+ err = vfs_setxattr(dentry, name, value, size, flags);
++ err = vfs_setxattr(userns, dentry, name, value, size, flags);
+ lockdep_on();
+
+ return err;
+}
+
-+static inline int vfsub_removexattr(struct dentry *dentry, const char *name)
++static inline int vfsub_removexattr(struct user_namespace *userns,
++ struct dentry *dentry, const char *name)
+{
+ int err;
+
+ lockdep_off();
-+ err = vfs_removexattr(dentry, name);
++ err = vfs_removexattr(userns, dentry, name);
+ lockdep_on();
+
+ return err;
+#endif /* __AUFS_VFSUB_H__ */
diff -urN /usr/share/empty/fs/aufs/wbr_policy.c linux/fs/aufs/wbr_policy.c
--- /usr/share/empty/fs/aufs/wbr_policy.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/wbr_policy.c 2019-07-11 15:42:14.475571481 +0200
++++ linux/fs/aufs/wbr_policy.c 2021-05-02 20:15:14.676670793 +0200
@@ -0,0 +1,830 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+};
diff -urN /usr/share/empty/fs/aufs/whout.c linux/fs/aufs/whout.c
--- /usr/share/empty/fs/aufs/whout.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/whout.c 2019-07-11 15:42:14.475571481 +0200
-@@ -0,0 +1,1062 @@
++++ linux/fs/aufs/whout.c 2021-05-02 20:15:14.676670793 +0200
+@@ -0,0 +1,1070 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * test if the @wh_name exists under @h_parent.
+ * @try_sio specifies the necessary of super-io.
+ */
-+int au_wh_test(struct dentry *h_parent, struct qstr *wh_name, int try_sio)
++int au_wh_test(struct user_namespace *h_userns, struct dentry *h_parent,
++ struct qstr *wh_name, int try_sio)
+{
+ int err;
+ struct dentry *wh_dentry;
+ if (!try_sio)
+ wh_dentry = vfsub_lkup_one(wh_name, h_parent);
+ else
-+ wh_dentry = au_sio_lkup_one(wh_name, h_parent);
++ wh_dentry = au_sio_lkup_one(h_userns, wh_name, h_parent);
+ err = PTR_ERR(wh_dentry);
+ if (IS_ERR(wh_dentry)) {
+ if (err == -ENAMETOOLONG)
+/*
+ * test if the @h_dentry sets opaque or not.
+ */
-+int au_diropq_test(struct dentry *h_dentry)
++int au_diropq_test(struct user_namespace *h_userns, struct dentry *h_dentry)
+{
+ int err;
+ struct inode *h_dir;
+
+ h_dir = d_inode(h_dentry);
-+ err = au_wh_test(h_dentry, &diropq_name,
-+ au_test_h_perm_sio(h_dir, MAY_EXEC));
++ err = au_wh_test(h_userns, h_dentry, &diropq_name,
++ au_test_h_perm_sio(h_userns, h_dir, MAY_EXEC));
+ return err;
+}
+
+ /* strict atomic_t is unnecessary here */
+ static unsigned short cnt;
+ struct qstr qs;
++ struct user_namespace *h_userns;
+
+ BUILD_BUG_ON(sizeof(cnt) * 2 > AUFS_WH_TMP_LEN);
+
+ *p++ = '.';
+ AuDebugOn(name + qs.len + 1 - p <= AUFS_WH_TMP_LEN);
+
++ h_userns = au_br_userns(br);
+ qs.name = name;
+ for (i = 0; i < 3; i++) {
+ sprintf(p, "%.*x", AUFS_WH_TMP_LEN, cnt++);
-+ dentry = au_sio_lkup_one(&qs, h_parent);
++ dentry = au_sio_lkup_one(h_userns, &qs, h_parent);
+ if (IS_ERR(dentry) || d_is_negative(dentry))
+ goto out_name;
+ dput(dentry);
+
+ pr_err("%pd (%s) doesn't support link(2), use noplink and rw+nolwh\n",
+ h_root, au_sbtype(h_root->d_sb));
-+ return -ENOSYS;
++ return -ENOSYS; /* the branch doesn't have its ->link() */
+}
+
+/* todo: should this mkdir be done in /sbin/mount.aufs helper? */
+ unsigned int flags)
+{
+ struct dentry *diropq, *h_dentry;
++ struct user_namespace *h_userns;
+
++ h_userns = au_sbr_userns(dentry->d_sb, bindex);
+ h_dentry = au_h_dptr(dentry, bindex);
-+ if (!au_test_h_perm_sio(d_inode(h_dentry), MAY_EXEC | MAY_WRITE))
++ if (!au_test_h_perm_sio(h_userns, d_inode(h_dentry),
++ MAY_EXEC | MAY_WRITE))
+ diropq = do_diropq(dentry, bindex, flags);
+ else {
+ int wkq_err;
+ struct path h_tmp;
+ struct inode *wh_inode, *h_dir;
+ struct au_branch *br;
++ struct user_namespace *h_userns;
+
+ h_dir = d_inode(wh_dentry->d_parent); /* dir inode is locked */
+ IMustLock(h_dir);
+
+ br = au_sbr(dir->i_sb, bindex);
++ h_userns = au_br_userns(br);
+ wh_inode = d_inode(wh_dentry);
+ inode_lock_nested(wh_inode, AuLsc_I_CHILD);
+
+ * someone else might change some whiteouts while we were sleeping.
+ * it means this whlist may have an obsoleted entry.
+ */
-+ if (!au_test_h_perm_sio(wh_inode, MAY_EXEC | MAY_WRITE))
++ if (!au_test_h_perm_sio(h_userns, wh_inode, MAY_EXEC | MAY_WRITE))
+ err = del_wh_children(wh_dentry, whlist, bindex, br);
+ else {
+ int wkq_err;
+}
diff -urN /usr/share/empty/fs/aufs/whout.h linux/fs/aufs/whout.h
--- /usr/share/empty/fs/aufs/whout.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/whout.h 2019-07-11 15:42:14.475571481 +0200
-@@ -0,0 +1,86 @@
++++ linux/fs/aufs/whout.h 2021-05-02 20:15:14.676670793 +0200
+@@ -0,0 +1,87 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+
+/* whout.c */
+int au_wh_name_alloc(struct qstr *wh, const struct qstr *name);
-+int au_wh_test(struct dentry *h_parent, struct qstr *wh_name, int try_sio);
-+int au_diropq_test(struct dentry *h_dentry);
++int au_wh_test(struct user_namespace *h_userns, struct dentry *h_parent,
++ struct qstr *wh_name, int try_sio);
++int au_diropq_test(struct user_namespace *h_userns, struct dentry *h_dentry);
+struct au_branch;
+struct dentry *au_whtmp_lkup(struct dentry *h_parent, struct au_branch *br,
+ struct qstr *prefix);
+#endif /* __AUFS_WHOUT_H__ */
diff -urN /usr/share/empty/fs/aufs/wkq.c linux/fs/aufs/wkq.c
--- /usr/share/empty/fs/aufs/wkq.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/wkq.c 2019-07-11 15:42:14.475571481 +0200
-@@ -0,0 +1,392 @@
++++ linux/fs/aufs/wkq.c 2021-05-02 20:15:14.676670793 +0200
+@@ -0,0 +1,372 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ goto out;
+
+ err = 0;
-+#if 0
-+ if (0 && au_debug_test()) /* left for debugging */
++#if 0 /* left for debugging */
++ if (0 && au_debug_test())
+ lockdep_print_held_locks(curr);
+#endif
+ held_locks = curr->held_locks;
+ if (!hl)
+ return;
+ while ((p = *hl++)) /* assignment */
-+ rwsem_release(p->instance, 0, /*p->acquire_ip*/_RET_IP_);
++ rwsem_release(p->instance, /*p->acquire_ip*/_RET_IP_);
+}
+#endif
+
+/*
+ * Since struct completion is large, try allocating it dynamically.
+ */
-+#if 1 /* defined(CONFIG_4KSTACKS) || defined(AuTest4KSTACKS) */
+#define AuWkqCompDeclare(name) struct completion *comp = NULL
+
+static int au_wkq_comp_alloc(struct au_wkinfo *wkinfo, struct completion **comp)
+ au_kfree_rcu(comp);
+}
+
-+#else
-+
-+/* no braces */
-+#define AuWkqCompDeclare(name) \
-+ DECLARE_COMPLETION_ONSTACK(_ ## name); \
-+ struct completion *comp = &_ ## name
-+
-+static int au_wkq_comp_alloc(struct au_wkinfo *wkinfo, struct completion **comp)
-+{
-+ wkinfo->comp = *comp;
-+ return 0;
-+}
-+
-+static void au_wkq_comp_free(struct completion *comp __maybe_unused)
-+{
-+ /* empty */
-+}
-+#endif /* 4KSTACKS */
-+
+static void au_wkq_run(struct au_wkinfo *wkinfo)
+{
+ if (au_ftest_wkq(wkinfo->flags, NEST)) {
+}
diff -urN /usr/share/empty/fs/aufs/wkq.h linux/fs/aufs/wkq.h
--- /usr/share/empty/fs/aufs/wkq.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/wkq.h 2019-07-11 15:42:14.475571481 +0200
++++ linux/fs/aufs/wkq.h 2021-05-02 20:15:14.676670793 +0200
@@ -0,0 +1,89 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+#endif /* __AUFS_WKQ_H__ */
diff -urN /usr/share/empty/fs/aufs/xattr.c linux/fs/aufs/xattr.c
--- /usr/share/empty/fs/aufs/xattr.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/xattr.c 2019-07-11 15:42:14.475571481 +0200
-@@ -0,0 +1,356 @@
++++ linux/fs/aufs/xattr.c 2021-05-02 20:15:14.676670793 +0200
+@@ -0,0 +1,368 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2014-2019 Junjiro R. Okajima
++ * Copyright (C) 2014-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+
+static const int au_xattr_out_of_list = AuBrAttr_ICEX_OTH << 1;
+
-+static int au_do_cpup_xattr(struct dentry *h_dst, struct dentry *h_src,
++static int au_do_cpup_xattr(struct path *h_dst, struct path *h_src,
+ char *name, char **buf, unsigned int ignore_flags,
+ unsigned int verbose)
+{
+ int err;
+ ssize_t ssz;
+ struct inode *h_idst;
++ struct dentry *h_dst_dentry, *h_src_dentry;
++ struct user_namespace *h_dst_userns, *h_src_userns;
+
-+ ssz = vfs_getxattr_alloc(h_src, name, buf, 0, GFP_NOFS);
++ h_src_userns = mnt_user_ns(h_src->mnt);
++ h_src_dentry = h_src->dentry;
++ ssz = vfs_getxattr_alloc(h_src_userns, h_src_dentry, name, buf, 0,
++ GFP_NOFS);
+ err = ssz;
+ if (unlikely(err <= 0)) {
+ if (err == -ENODATA
+ || (err == -EOPNOTSUPP
+ && ((ignore_flags & au_xattr_out_of_list)
-+ || (au_test_nfs_noacl(d_inode(h_src))
++ || (au_test_nfs_noacl(d_inode(h_src_dentry))
+ && (!strcmp(name, XATTR_NAME_POSIX_ACL_ACCESS)
+ || !strcmp(name,
+ XATTR_NAME_POSIX_ACL_DEFAULT))))
+ }
+
+ /* unlock it temporary */
-+ h_idst = d_inode(h_dst);
++ h_dst_userns = mnt_user_ns(h_dst->mnt);
++ h_dst_dentry = h_dst->dentry;
++ h_idst = d_inode(h_dst_dentry);
+ inode_unlock(h_idst);
-+ err = vfsub_setxattr(h_dst, name, *buf, ssz, /*flags*/0);
++ err = vfsub_setxattr(h_dst_userns, h_dst_dentry, name, *buf, ssz,
++ /*flags*/0);
+ inode_lock_nested(h_idst, AuLsc_I_CHILD2);
+ if (unlikely(err)) {
+ if (verbose || au_debug_test())
+ return err;
+}
+
-+int au_cpup_xattr(struct dentry *h_dst, struct dentry *h_src, int ignore_flags,
++int au_cpup_xattr(struct path *h_dst, struct path *h_src, int ignore_flags,
+ unsigned int verbose)
+{
+ int err, unlocked, acl_access, acl_default;
+ ssize_t ssz;
++ struct dentry *h_dst_dentry, *h_src_dentry;
+ struct inode *h_isrc, *h_idst;
+ char *value, *p, *o, *e;
+
+ /* try stopping to update the source inode while we are referencing */
+ /* there should not be the parent-child relationship between them */
-+ h_isrc = d_inode(h_src);
-+ h_idst = d_inode(h_dst);
++ h_dst_dentry = h_dst->dentry;
++ h_idst = d_inode(h_dst_dentry);
++ h_src_dentry = h_src->dentry;
++ h_isrc = d_inode(h_src_dentry);
+ inode_unlock(h_idst);
+ inode_lock_shared_nested(h_isrc, AuLsc_I_CHILD);
+ inode_lock_nested(h_idst, AuLsc_I_CHILD2);
+ unlocked = 0;
+
+ /* some filesystems don't list POSIX ACL, for example tmpfs */
-+ ssz = vfs_listxattr(h_src, NULL, 0);
++ ssz = vfs_listxattr(h_src_dentry, NULL, 0);
+ err = ssz;
+ if (unlikely(err < 0)) {
+ AuTraceErr(err);
+ o = p;
+ if (unlikely(!p))
+ goto out;
-+ err = vfs_listxattr(h_src, p, ssz);
++ err = vfs_listxattr(h_src_dentry, p, ssz);
+ }
+ inode_unlock_shared(h_isrc);
+ unlocked = 1;
+
+static int au_smack_reentering(struct super_block *sb)
+{
-+#if IS_ENABLED(CONFIG_SECURITY_SMACK)
++#if IS_ENABLED(CONFIG_SECURITY_SMACK) || IS_ENABLED(CONFIG_SECURITY_SELINUX)
+ /*
+ * as a part of lookup, smack_d_instantiate() is called, and it calls
+ * i_op->getxattr(). ouch.
+ } u;
+};
+
-+static ssize_t au_lgxattr(struct dentry *dentry, struct au_lgxattr *arg)
++static ssize_t au_lgxattr(struct dentry *dentry, struct inode *inode,
++ struct au_lgxattr *arg)
+{
+ ssize_t err;
+ int reenter;
+ if (unlikely(err))
+ goto out;
+ }
-+ err = au_h_path_getattr(dentry, /*force*/1, &h_path, reenter);
++ err = au_h_path_getattr(dentry, inode, /*force*/1, &h_path, reenter);
+ if (unlikely(err))
+ goto out_si;
+ if (unlikely(!h_path.dentry))
+ break;
+ case AU_XATTR_GET:
+ AuDebugOn(d_is_negative(h_path.dentry));
-+ err = vfs_getxattr(h_path.dentry,
++ err = vfs_getxattr(mnt_user_ns(h_path.mnt), h_path.dentry,
+ arg->u.get.name, arg->u.get.value,
+ arg->u.get.size);
+ break;
+ },
+ };
+
-+ return au_lgxattr(dentry, &arg);
++ return au_lgxattr(dentry, /*inode*/NULL, &arg);
+}
+
-+static ssize_t au_getxattr(struct dentry *dentry,
-+ struct inode *inode __maybe_unused,
++static ssize_t au_getxattr(struct dentry *dentry, struct inode *inode,
+ const char *name, void *value, size_t size)
+{
+ struct au_lgxattr arg = {
+ },
+ };
+
-+ return au_lgxattr(dentry, &arg);
++ return au_lgxattr(dentry, inode, &arg);
+}
+
+static int au_setxattr(struct dentry *dentry, struct inode *inode,
+}
+
+static int au_xattr_set(const struct xattr_handler *handler,
++ struct user_namespace *userns,
+ struct dentry *dentry, struct inode *inode,
+ const char *name, const void *value, size_t size,
+ int flags)
+}
diff -urN /usr/share/empty/fs/aufs/xino.c linux/fs/aufs/xino.c
--- /usr/share/empty/fs/aufs/xino.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/xino.c 2019-07-11 15:42:14.475571481 +0200
-@@ -0,0 +1,1965 @@
++++ linux/fs/aufs/xino.c 2021-05-02 20:15:14.676670793 +0200
+@@ -0,0 +1,1925 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ }
+
+ /* no need to mnt_want_write() since we call dentry_open() later */
-+ err = vfs_create(dir, path.dentry, 0666, NULL);
++ err = vfs_create(mnt_user_ns(base->mnt), dir, path.dentry, 0666, NULL);
+ if (unlikely(err)) {
+ file = ERR_PTR(err);
+ pr_err("%pd create err %d\n", dentry, err);
+ ino_t h_ino, ino;
+};
+
-+static int au_xino_do_write(vfs_writef_t write, struct file *file,
-+ struct au_xi_calc *calc, ino_t ino);
++static int au_xino_do_write(struct file *file, struct au_xi_calc *calc,
++ ino_t ino);
+
+static void au_xino_call_do_new_async(void *args)
+{
+
+ file = au_xino_file(br->br_xino, a->calc.idx);
+ AuDebugOn(!file);
-+ err = au_xino_do_write(sbi->si_xwrite, file, &a->calc, a->ino);
++ err = au_xino_do_write(file, &a->calc, a->ino);
+ if (unlikely(err)) {
+ AuIOErr("err %d\n", err);
+ goto out;
+ return 0; /* no xino */
+
+ sbinfo = au_sbi(sb);
-+ sz = xino_fread(sbinfo->si_xread, file, ino, sizeof(*ino), &calc.pos);
++ sz = xino_fread(file, ino, sizeof(*ino), &calc.pos);
+ if (sz == sizeof(*ino))
+ return 0; /* success */
+
+ return err;
+}
+
-+static int au_xino_do_write(vfs_writef_t write, struct file *file,
-+ struct au_xi_calc *calc, ino_t ino)
++static int au_xino_do_write(struct file *file, struct au_xi_calc *calc,
++ ino_t ino)
+{
+ ssize_t sz;
+
-+ sz = xino_fwrite(write, file, &ino, sizeof(ino), &calc->pos);
++ sz = xino_fwrite(file, &ino, sizeof(ino), &calc->pos);
+ if (sz == sizeof(ino))
+ return 0; /* success */
+
+ goto out;
+ }
+
-+ err = au_xino_do_write(au_sbi(sb)->si_xwrite, file, &calc, ino);
++ err = au_xino_do_write(file, &calc, ino);
+ if (!err) {
+ br = au_sbr(sb, bindex);
+ if (au_opt_test(mnt_flags, TRUNC_XINO)
+ return -EIO;
+}
+
-+static ssize_t xino_fread_wkq(vfs_readf_t func, struct file *file, void *buf,
-+ size_t size, loff_t *pos);
++static ssize_t xino_fread_wkq(struct file *file, void *buf, size_t size,
++ loff_t *pos);
+
+/* todo: unnecessary to support mmap_sem since kernel-space? */
-+ssize_t xino_fread(vfs_readf_t func, struct file *file, void *kbuf, size_t size,
-+ loff_t *pos)
++ssize_t xino_fread(struct file *file, void *kbuf, size_t size, loff_t *pos)
+{
+ ssize_t err;
-+ mm_segment_t oldfs;
-+ union {
-+ void *k;
-+ char __user *u;
-+ } buf;
+ int i;
+ const int prevent_endless = 10;
+
+ i = 0;
-+ buf.k = kbuf;
-+ oldfs = get_fs();
-+ set_fs(KERNEL_DS);
+ do {
-+ err = func(file, buf.u, size, pos);
++ err = vfsub_read_k(file, kbuf, size, pos);
+ if (err == -EINTR
+ && !au_wkq_test()
+ && fatal_signal_pending(current)) {
-+ set_fs(oldfs);
-+ err = xino_fread_wkq(func, file, kbuf, size, pos);
++ err = xino_fread_wkq(file, kbuf, size, pos);
+ BUG_ON(err == -EINTR);
-+ oldfs = get_fs();
-+ set_fs(KERNEL_DS);
+ }
+ } while (i++ < prevent_endless
+ && (err == -EAGAIN || err == -EINTR));
-+ set_fs(oldfs);
+
+#if 0 /* reserved for future use */
+ if (err > 0)
+
+struct xino_fread_args {
+ ssize_t *errp;
-+ vfs_readf_t func;
+ struct file *file;
+ void *buf;
+ size_t size;
+static void call_xino_fread(void *args)
+{
+ struct xino_fread_args *a = args;
-+ *a->errp = xino_fread(a->func, a->file, a->buf, a->size, a->pos);
++ *a->errp = xino_fread(a->file, a->buf, a->size, a->pos);
+}
+
-+static ssize_t xino_fread_wkq(vfs_readf_t func, struct file *file, void *buf,
-+ size_t size, loff_t *pos)
++static ssize_t xino_fread_wkq(struct file *file, void *buf, size_t size,
++ loff_t *pos)
+{
+ ssize_t err;
+ int wkq_err;
+ struct xino_fread_args args = {
+ .errp = &err,
-+ .func = func,
+ .file = file,
+ .buf = buf,
+ .size = size,
+ return err;
+}
+
-+static ssize_t xino_fwrite_wkq(vfs_writef_t func, struct file *file, void *buf,
-+ size_t size, loff_t *pos);
++static ssize_t xino_fwrite_wkq(struct file *file, void *buf, size_t size,
++ loff_t *pos);
+
-+static ssize_t do_xino_fwrite(vfs_writef_t func, struct file *file, void *kbuf,
-+ size_t size, loff_t *pos)
++static ssize_t do_xino_fwrite(struct file *file, void *kbuf, size_t size,
++ loff_t *pos)
+{
+ ssize_t err;
-+ mm_segment_t oldfs;
-+ union {
-+ void *k;
-+ const char __user *u;
-+ } buf;
+ int i;
+ const int prevent_endless = 10;
+
+ i = 0;
-+ buf.k = kbuf;
-+ oldfs = get_fs();
-+ set_fs(KERNEL_DS);
+ do {
-+ err = func(file, buf.u, size, pos);
++ err = vfsub_write_k(file, kbuf, size, pos);
+ if (err == -EINTR
+ && !au_wkq_test()
+ && fatal_signal_pending(current)) {
-+ set_fs(oldfs);
-+ err = xino_fwrite_wkq(func, file, kbuf, size, pos);
++ err = xino_fwrite_wkq(file, kbuf, size, pos);
+ BUG_ON(err == -EINTR);
-+ oldfs = get_fs();
-+ set_fs(KERNEL_DS);
+ }
+ } while (i++ < prevent_endless
+ && (err == -EAGAIN || err == -EINTR));
-+ set_fs(oldfs);
+
+#if 0 /* reserved for future use */
+ if (err > 0)
+
+struct do_xino_fwrite_args {
+ ssize_t *errp;
-+ vfs_writef_t func;
+ struct file *file;
+ void *buf;
+ size_t size;
+static void call_do_xino_fwrite(void *args)
+{
+ struct do_xino_fwrite_args *a = args;
-+ *a->errp = do_xino_fwrite(a->func, a->file, a->buf, a->size, a->pos);
++ *a->errp = do_xino_fwrite(a->file, a->buf, a->size, a->pos);
+}
+
-+static ssize_t xino_fwrite_wkq(vfs_writef_t func, struct file *file, void *buf,
-+ size_t size, loff_t *pos)
++static ssize_t xino_fwrite_wkq(struct file *file, void *buf, size_t size,
++ loff_t *pos)
+{
+ ssize_t err;
+ int wkq_err;
+ struct do_xino_fwrite_args args = {
+ .errp = &err,
-+ .func = func,
+ .file = file,
+ .buf = buf,
+ .size = size,
+ return err;
+}
+
-+ssize_t xino_fwrite(vfs_writef_t func, struct file *file, void *buf,
-+ size_t size, loff_t *pos)
++ssize_t xino_fwrite(struct file *file, void *buf, size_t size, loff_t *pos)
+{
+ ssize_t err;
+
+ if (rlimit(RLIMIT_FSIZE) == RLIM_INFINITY) {
+ lockdep_off();
-+ err = do_xino_fwrite(func, file, buf, size, pos);
++ err = do_xino_fwrite(file, buf, size, pos);
+ lockdep_on();
+ } else {
+ lockdep_off();
-+ err = xino_fwrite_wkq(func, file, buf, size, pos);
++ err = xino_fwrite_wkq(file, buf, size, pos);
+ lockdep_on();
+ }
+
+ p = sbinfo->si_xib_buf;
+ pos = sbinfo->si_xib_last_pindex;
+ pos *= PAGE_SIZE;
-+ sz = xino_fwrite(sbinfo->si_xwrite, xib, p, PAGE_SIZE, &pos);
++ sz = xino_fwrite(xib, p, PAGE_SIZE, &pos);
+ if (unlikely(sz != PAGE_SIZE))
+ goto out;
+
+ pos = pindex;
+ pos *= PAGE_SIZE;
+ if (vfsub_f_size_read(xib) >= pos + PAGE_SIZE)
-+ sz = xino_fread(sbinfo->si_xread, xib, p, PAGE_SIZE, &pos);
++ sz = xino_fread(xib, p, PAGE_SIZE, &pos);
+ else {
+ memset(p, 0, PAGE_SIZE);
-+ sz = xino_fwrite(sbinfo->si_xwrite, xib, p, PAGE_SIZE, &pos);
++ sz = xino_fwrite(xib, p, PAGE_SIZE, &pos);
+ }
+ if (sz == PAGE_SIZE) {
+ sbinfo->si_xib_last_pindex = pindex;
+ unsigned long pindex;
+ loff_t pos, pend;
+ struct au_sbinfo *sbinfo;
-+ vfs_readf_t func;
+ ino_t *ino;
+ unsigned long *p;
+
+ sbinfo = au_sbi(sb);
+ MtxMustLock(&sbinfo->si_xib_mtx);
+ p = sbinfo->si_xib_buf;
-+ func = sbinfo->si_xread;
+ pend = vfsub_f_size_read(file);
+ pos = 0;
+ while (pos < pend) {
-+ sz = xino_fread(func, file, page, PAGE_SIZE, &pos);
++ sz = xino_fread(file, page, PAGE_SIZE, &pos);
+ err = sz;
+ if (unlikely(sz <= 0))
+ goto out;
+ p = sbinfo->si_xib_buf;
+ memset(p, 0, PAGE_SIZE);
+ pos = 0;
-+ sz = xino_fwrite(sbinfo->si_xwrite, sbinfo->si_xib, p, PAGE_SIZE, &pos);
++ sz = xino_fwrite(sbinfo->si_xib, p, PAGE_SIZE, &pos);
+ if (unlikely(sz != PAGE_SIZE)) {
+ err = sz;
+ AuIOErr("err %d\n", err);
+ if (unlikely(ul)) {
+ pr_warn("xi_writing %lu\n", ul);
+ hlist_bl_lock(hbl);
-+ hlist_bl_for_each_entry_safe (p, pos, n, hbl, node) {
++ hlist_bl_for_each_entry_safe(p, pos, n, hbl, node) {
+ hlist_bl_del(&p->node);
-+ au_kfree_rcu(p);
++ /* kmemleak reported au_kfree_rcu() doesn't free it */
++ kfree(p);
+ }
+ hlist_bl_unlock(hbl);
+ }
+ SiMustWriteLock(sb);
+
+ sbinfo = au_sbi(sb);
-+ /* unnecessary to clear sbinfo->si_xread and ->si_xwrite */
+ if (sbinfo->si_xib)
+ fput(sbinfo->si_xib);
+ sbinfo->si_xib = NULL;
+ if (sbinfo->si_xib)
+ fput(sbinfo->si_xib);
+ sbinfo->si_xib = file;
-+ sbinfo->si_xread = vfs_readf(file);
-+ sbinfo->si_xwrite = vfs_writef(file);
+ xi_sb = file_inode(file)->i_sb;
+ sbinfo->si_ximaxent = xi_sb->s_maxbytes;
+ if (unlikely(sbinfo->si_ximaxent < PAGE_SIZE)) {
+ sbinfo->si_xib_next_bit = 0;
+ if (vfsub_f_size_read(file) < PAGE_SIZE) {
+ pos = 0;
-+ err = xino_fwrite(sbinfo->si_xwrite, file, sbinfo->si_xib_buf,
-+ PAGE_SIZE, &pos);
++ err = xino_fwrite(file, sbinfo->si_xib_buf, PAGE_SIZE, &pos);
+ if (unlikely(err != PAGE_SIZE))
+ goto out_free;
+ }
+}
+
+struct au_xino_do_set_br {
-+ vfs_writef_t writef;
+ struct au_branch *br;
+ ino_t h_ino;
+ aufs_bindex_t bshared;
+ goto out;
+ AuDebugOn(!file);
+
-+ err = au_xino_do_write(args->writef, file, &calc, AUFS_ROOT_INO);
++ err = au_xino_do_write(file, &calc, AUFS_ROOT_INO);
+ if (unlikely(err))
+ au_xino_put(br);
+
+
+ bbot = au_sbbot(sb);
+ inode = d_inode(sb->s_root);
-+ args.writef = au_sbi(sb)->si_xwrite;
+ for (bindex = 0; bindex <= bbot; bindex++) {
+ args.h_ino = au_h_iptr(inode, bindex)->i_ino;
+ args.br = au_sbr(sb, bindex);
+ .br = br
+ };
+
-+ args.writef = au_sbi(sb)->si_xwrite;
+ args.bshared = sbr_find_shared(sb, /*btop*/0, au_sbbot(sb),
+ au_br_sb(br));
+ err = au_xino_do_set_br(sb, base, &args);
+ struct au_hinode *hi;
+ struct inode *h_inode;
+ struct au_branch *br;
-+ vfs_writef_t xwrite;
+ struct au_xi_calc calc;
+ struct file *file;
+
+ if (bindex < 0)
+ return;
+
-+ xwrite = au_sbi(sb)->si_xwrite;
+ try_trunc = !!au_opt_test(mnt_flags, TRUNC_XINO);
+ hi = au_hinode(iinfo, bindex);
+ bbot = iinfo->ii_bbot;
+ if (IS_ERR_OR_NULL(file))
+ continue;
+
-+ err = au_xino_do_write(xwrite, file, &calc, /*ino*/0);
++ err = au_xino_do_write(file, &calc, /*ino*/0);
+ if (!err && try_trunc
+ && au_test_fs_trunc_xino(au_br_sb(br)))
+ xino_try_trunc(sb, br);
+}
diff -urN /usr/share/empty/include/uapi/linux/aufs_type.h linux/include/uapi/linux/aufs_type.h
--- /usr/share/empty/include/uapi/linux/aufs_type.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux/include/uapi/linux/aufs_type.h 2019-09-16 09:38:43.216175640 +0200
++++ linux/include/uapi/linux/aufs_type.h 2021-05-02 20:15:14.676670793 +0200
@@ -0,0 +1,452 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
-+ * Copyright (C) 2005-2019 Junjiro R. Okajima
++ * Copyright (C) 2005-2020 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+#define pr_fmt(fmt) \
+ AUFS_NAME " %s:%d:%.*s[%d]: " fmt, __func__, __LINE__, \
+ (int)sizeof(current->comm), current->comm, current->pid
++#include <linux/limits.h>
+#else
+#include <stdint.h>
+#include <sys/types.h>
++#include <limits.h>
+#endif /* __KERNEL__ */
+
-+#include <linux/limits.h>
-+
-+#define AUFS_VERSION "5.x-rcN-20190909"
++#define AUFS_VERSION "5.12-20210503"
+
+/* todo? move this to linux-2.6.19/include/magic.h */
+#define AUFS_SUPER_MAGIC ('a' << 24 | 'u' << 16 | 'f' << 8 | 's')
+
+/* ---------------------------------------------------------------------- */
+
++#ifdef __KERNEL__
+#ifdef CONFIG_AUFS_BRANCH_MAX_127
+typedef int8_t aufs_bindex_t;
+#define AUFS_BRANCH_MAX 127
+#endif
+#endif
+
-+#ifdef __KERNEL__
+#ifndef AUFS_BRANCH_MAX
+#error unknown CONFIG_AUFS_BRANCH_MAX value
+#endif
+ uint8_t type;
+ uint8_t nlen;
+ uint8_t wh;
-+ char name[0];
++ char name[];
+} __aligned(8);
+
+static inline int au_rdu_len(int nlen)
+ uint8_t oldnamelen;
+ uint64_t _padding;
+ };
-+ uint8_t oldname[0];
++ uint8_t oldname[];
+} __aligned(8);
+
+struct au_drinfo_fdata {
+ struct {
+ int16_t id;
+ int perm;
-+ char path[0];
++ char path[];
+ };
+} __aligned(8);
+
+
+#endif /* __AUFS_TYPE_H__ */
SPDX-License-Identifier: GPL-2.0
-aufs5.x-rcN loopback patch
+aufs5.12 loopback patch
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
-index 80d06084b043..a83cdfec7359 100644
+index 01ca256575fb2..f5a76bacf6c85 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
-@@ -625,6 +625,15 @@ static inline void loop_update_dio(struct loop_device *lo)
- lo->use_dio);
+@@ -646,6 +646,15 @@ static inline void loop_update_dio(struct loop_device *lo)
+ lo->use_dio);
}
+static struct file *loop_real_file(struct file *file)
static void loop_reread_partitions(struct loop_device *lo,
struct block_device *bdev)
{
-@@ -678,6 +687,7 @@ static int loop_change_fd(struct loop_device *lo, struct block_device *bdev,
+@@ -701,6 +710,7 @@ static int loop_change_fd(struct loop_device *lo, struct block_device *bdev,
unsigned int arg)
{
struct file *file = NULL, *old_file;
int error;
bool partscan;
-@@ -697,12 +707,19 @@ static int loop_change_fd(struct loop_device *lo, struct block_device *bdev,
+@@ -720,12 +730,19 @@ static int loop_change_fd(struct loop_device *lo, struct block_device *bdev,
file = fget(arg);
if (!file)
goto out_err;
error = -EINVAL;
-@@ -714,6 +731,7 @@ static int loop_change_fd(struct loop_device *lo, struct block_device *bdev,
+@@ -737,6 +754,7 @@ static int loop_change_fd(struct loop_device *lo, struct block_device *bdev,
blk_mq_freeze_queue(lo->lo_queue);
mapping_set_gfp_mask(old_file->f_mapping, lo->old_gfp_mask);
lo->lo_backing_file = file;
lo->old_gfp_mask = mapping_gfp_mask(file->f_mapping);
mapping_set_gfp_mask(file->f_mapping,
lo->old_gfp_mask & ~(__GFP_IO|__GFP_FS));
-@@ -727,6 +745,8 @@ static int loop_change_fd(struct loop_device *lo, struct block_device *bdev,
+@@ -750,6 +768,8 @@ static int loop_change_fd(struct loop_device *lo, struct block_device *bdev,
* dependency.
*/
fput(old_file);
if (partscan)
loop_reread_partitions(lo, bdev);
return 0;
-@@ -735,6 +755,8 @@ static int loop_change_fd(struct loop_device *lo, struct block_device *bdev,
- mutex_unlock(&loop_ctl_mutex);
+@@ -758,6 +778,8 @@ static int loop_change_fd(struct loop_device *lo, struct block_device *bdev,
+ mutex_unlock(&lo->lo_mutex);
if (file)
fput(file);
+ if (virt_file)
return error;
}
-@@ -939,7 +961,7 @@ static void loop_update_rotational(struct loop_device *lo)
- static int loop_set_fd(struct loop_device *lo, fmode_t mode,
- struct block_device *bdev, unsigned int arg)
+@@ -1084,7 +1106,7 @@ static int loop_configure(struct loop_device *lo, fmode_t mode,
+ struct block_device *bdev,
+ const struct loop_config *config)
{
- struct file *file;
+ struct file *file, *f, *virt_file = NULL;
struct inode *inode;
struct address_space *mapping;
- struct block_device *claimed_bdev = NULL;
-@@ -955,6 +977,12 @@ static int loop_set_fd(struct loop_device *lo, fmode_t mode,
- file = fget(arg);
+ int error;
+@@ -1099,6 +1121,12 @@ static int loop_configure(struct loop_device *lo, fmode_t mode,
+ file = fget(config->fd);
if (!file)
goto out;
+ f = loop_real_file(file);
/*
* If we don't hold exclusive handle for the device, upgrade to it
-@@ -1003,6 +1031,7 @@ static int loop_set_fd(struct loop_device *lo, fmode_t mode,
+@@ -1153,6 +1181,7 @@ static int loop_configure(struct loop_device *lo, fmode_t mode,
+ lo->use_dio = lo->lo_flags & LO_FLAGS_DIRECT_IO;
lo->lo_device = bdev;
- lo->lo_flags = lo_flags;
lo->lo_backing_file = file;
+ lo->lo_backing_virt_file = virt_file;
- lo->transfer = NULL;
- lo->ioctl = NULL;
- lo->lo_sizelimit = 0;
-@@ -1046,6 +1075,8 @@ static int loop_set_fd(struct loop_device *lo, fmode_t mode,
- bd_abort_claiming(bdev, claimed_bdev, loop_set_fd);
+ lo->old_gfp_mask = mapping_gfp_mask(mapping);
+ mapping_set_gfp_mask(mapping, lo->old_gfp_mask & ~(__GFP_IO|__GFP_FS));
+
+@@ -1203,6 +1232,8 @@ static int loop_configure(struct loop_device *lo, fmode_t mode,
+ bd_abort_claiming(bdev, loop_configure);
out_putf:
fput(file);
+ if (virt_file)
out:
/* This is safe: open() is still holding a reference. */
module_put(THIS_MODULE);
-@@ -1092,6 +1123,7 @@ loop_init_xfer(struct loop_device *lo, struct loop_func_table *xfer,
+@@ -1212,6 +1243,7 @@ static int loop_configure(struct loop_device *lo, fmode_t mode,
static int __loop_clr_fd(struct loop_device *lo, bool release)
{
struct file *filp = NULL;
gfp_t gfp = lo->old_gfp_mask;
struct block_device *bdev = lo->lo_device;
int err = 0;
-@@ -1115,6 +1147,7 @@ static int __loop_clr_fd(struct loop_device *lo, bool release)
+@@ -1238,6 +1270,7 @@ static int __loop_clr_fd(struct loop_device *lo, bool release)
spin_lock_irq(&lo->lo_lock);
lo->lo_backing_file = NULL;
spin_unlock_irq(&lo->lo_lock);
loop_release_xfer(lo);
-@@ -1197,6 +1230,8 @@ static int __loop_clr_fd(struct loop_device *lo, bool release)
+@@ -1319,6 +1352,8 @@ static int __loop_clr_fd(struct loop_device *lo, bool release)
*/
if (filp)
fput(filp);
}
diff --git a/drivers/block/loop.h b/drivers/block/loop.h
-index af75a5ee4094..1e6ee5a4f623 100644
+index a3c04f310672e..161c3c5d1c22b 100644
--- a/drivers/block/loop.h
+++ b/drivers/block/loop.h
@@ -46,7 +46,7 @@ struct loop_device {
unsigned long arg);
- struct file * lo_backing_file;
-+ struct file * lo_backing_file, *lo_backing_virt_file;
++ struct file *lo_backing_file, *lo_backing_virt_file;
struct block_device *lo_device;
void *key_data;
diff --git a/fs/aufs/f_op.c b/fs/aufs/f_op.c
-index 0309f0d502ff..19feb4f3cb5f 100644
+index 9f58ba0cb769f..1c2267a5a2ae1 100644
--- a/fs/aufs/f_op.c
+++ b/fs/aufs/f_op.c
-@@ -359,7 +359,7 @@ static ssize_t aufs_read_iter(struct kiocb *kio, struct iov_iter *iov_iter)
+@@ -304,7 +304,7 @@ static ssize_t aufs_read_iter(struct kiocb *kio, struct iov_iter *iov_iter)
if (IS_ERR(h_file))
goto out;
if (file->f_mapping != h_file->f_mapping) {
file->f_mapping = h_file->f_mapping;
diff --git a/fs/aufs/loop.c b/fs/aufs/loop.c
-index 9ba35a878ecd..4ed0ff03d5ab 100644
+index a8b63acc62045..9d97c3af5686a 100644
--- a/fs/aufs/loop.c
+++ b/fs/aufs/loop.c
@@ -133,3 +133,19 @@ void au_loopback_fin(void)
+ return f;
+}
diff --git a/fs/aufs/loop.h b/fs/aufs/loop.h
-index f31e40aff267..e13fb1a0717a 100644
+index 94f4f80ae33bf..ca1194354aff4 100644
--- a/fs/aufs/loop.h
+++ b/fs/aufs/loop.h
@@ -26,6 +26,8 @@ void au_warn_loopback(struct super_block *h_sb);
#endif /* __KERNEL__ */
diff --git a/fs/aufs/super.c b/fs/aufs/super.c
-index a97e2921cb09..f74eb6962684 100644
+index d252963a87b53..ecfc5fc96ad8c 100644
--- a/fs/aufs/super.c
+++ b/fs/aufs/super.c
@@ -844,7 +844,10 @@ static const struct super_operations aufs_sop = {
/* ---------------------------------------------------------------------- */
diff --git a/include/linux/fs.h b/include/linux/fs.h
-index 3dbec51c2037..38ab7b6c7c6d 100644
+index 4fa4b24535fde..2aec4bc9f5aa1 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
-@@ -1948,6 +1948,10 @@ struct super_operations {
+@@ -2041,6 +2041,10 @@ struct super_operations {
struct shrink_control *);
long (*free_cached_objects)(struct super_block *,
struct shrink_control *);
-+#if defined(CONFIG_BLK_DEV_LOOP) || defined(CONFIG_BLK_DEV_LOOP_MODULE)
++#if IS_ENABLED(CONFIG_BLK_DEV_LOOP) || IS_ENABLED(CONFIG_BLK_DEV_LOOP_MODULE)
+ /* and aufs */
+ struct file *(*real_loop)(struct file *);
+#endif
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