aufs5.x-rcN kbuild patch
diff --git a/fs/Kconfig b/fs/Kconfig
-index f08fbbfafd9a0..1c597cddc351c 100644
+index 5976eb33535f..7dba4acf10ce 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
-@@ -267,6 +267,7 @@ source "fs/sysv/Kconfig"
+@@ -320,6 +320,7 @@ source "fs/sysv/Kconfig"
source "fs/ufs/Kconfig"
source "fs/erofs/Kconfig"
source "fs/vboxsf/Kconfig"
endif # MISC_FILESYSTEMS
diff --git a/fs/Makefile b/fs/Makefile
-index 2ce5112b02c86..d9b4a51985538 100644
+index 208a74e0b00e..57d47a0762e0 100644
--- a/fs/Makefile
+++ b/fs/Makefile
-@@ -136,3 +136,4 @@ obj-$(CONFIG_EFIVAR_FS) += efivarfs/
+@@ -140,3 +140,4 @@ obj-$(CONFIG_EFIVAR_FS) += efivarfs/
obj-$(CONFIG_EROFS_FS) += erofs/
obj-$(CONFIG_VBOXSF_FS) += vboxsf/
obj-$(CONFIG_ZONEFS_FS) += zonefs/
aufs5.x-rcN base patch
diff --git a/MAINTAINERS b/MAINTAINERS
-index 50659d76976b7..80f67140e4f70 100644
+index 66bffb24a348..9dc7cad5fa1e 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
-@@ -2946,6 +2946,19 @@ F: include/linux/audit.h
- F: include/uapi/linux/audit.h
+@@ -3355,6 +3355,19 @@ F: include/uapi/linux/audit.h
F: kernel/audit*
+ F: lib/*audit.c
+AUFS (advanced multi layered unification filesystem) FILESYSTEM
+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 da693e6a834e5..0479902a0cd50 100644
+index 084f9b8a0ba3..a705173cf452 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
-@@ -753,6 +753,24 @@ static int loop_change_fd(struct loop_device *lo, struct block_device *bdev,
- return error;
+@@ -645,6 +645,24 @@ static int loop_change_fd(struct loop_device *lo, struct block_device *bdev,
+ goto done;
}
+/*
static ssize_t loop_attr_show(struct device *dev, char *page,
diff --git a/fs/dcache.c b/fs/dcache.c
-index b280e07e162b1..046000653e4d8 100644
+index 93f4f5ee07bf..cddcf2e44930 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
-@@ -1266,7 +1266,7 @@ enum d_walk_ret {
+@@ -1345,7 +1345,7 @@ 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 2e4c0fa2074b0..0b28a37f7e505 100644
+index 34a3faa4886d..68457c0e1e6c 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)
if (error)
return error;
-diff --git a/fs/inode.c b/fs/inode.c
-index 93d9252a00ab4..7700c5e4783b9 100644
---- a/fs/inode.c
-+++ b/fs/inode.c
-@@ -1688,7 +1688,7 @@ 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)
- {
- 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 a28e4db075ede..12e725e34c6ca 100644
+index e6a7e769d25d..e0aa17f8c802 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
-@@ -776,6 +776,12 @@ static inline int check_mnt(struct mount *mnt)
+@@ -852,6 +852,12 @@ 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 bbfa9b12b15eb..5d684d7d29207 100644
---- a/fs/read_write.c
-+++ b/fs/read_write.c
-@@ -499,6 +499,28 @@ static ssize_t __vfs_write(struct file *file, const char __user *p,
- return ret;
- }
-
-+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); /* doesn't have ->read(|_iter)() op */
-+}
-+
-+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); /* doesn't have ->write(|_iter)() op */
-+}
-+
- /* caller is responsible for file_start_write/file_end_write */
- ssize_t __kernel_write(struct file *file, const void *buf, size_t count, loff_t *pos)
- {
diff --git a/fs/splice.c b/fs/splice.c
-index 4e53efbd621db..9f230ee854e20 100644
+index 047b79db8eb5..a21caa5c54c8 100644
--- a/fs/splice.c
+++ b/fs/splice.c
-@@ -849,8 +849,8 @@ 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);
-@@ -866,9 +866,9 @@ 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);
-diff --git a/fs/sync.c b/fs/sync.c
-index 4d1ff010bc5af..457f4e4a5cc1f 100644
---- a/fs/sync.c
-+++ b/fs/sync.c
-@@ -28,7 +28,7 @@
- * wait == 1 case since in that case write_inode() functions do
- * sync_dirty_buffer() and thus effectively write one block at a time.
- */
--static int __sync_filesystem(struct super_block *sb, int wait)
-+int __sync_filesystem(struct super_block *sb, int wait)
- {
- if (wait)
- sync_inodes_sb(sb);
+ unsigned int p_space;
+ int ret;
diff --git a/include/linux/fs.h b/include/linux/fs.h
-index 45cc10cdf6ddd..916efd7e612b3 100644
+index 9ad5e3520fae..f5aed17b2ce2 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
-@@ -1355,6 +1355,7 @@ extern void fasync_free(struct fasync_struct *);
+@@ -1348,6 +1348,7 @@ extern void fasync_free(struct fasync_struct *);
/* can be called from interrupts */
extern void kill_fasync(struct fasync_struct **, int, int);
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);
-@@ -1847,6 +1848,7 @@ struct file_operations {
+@@ -1986,6 +1987,7 @@ 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);
-@@ -1917,6 +1919,12 @@ 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_write(struct file *, const char __user *, size_t, loff_t *);
- extern ssize_t vfs_readv(struct file *, const struct iovec __user *,
-@@ -2349,6 +2357,7 @@ extern int current_umask(void);
+@@ -2483,6 +2485,7 @@ 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;
-@@ -2633,6 +2642,7 @@ static inline bool sb_is_blkdev_sb(struct super_block *sb)
- return false;
+@@ -2663,6 +2666,7 @@ 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 206774ac69460..e5eda5226fbc7 100644
+index b6829b970093..af63df9ba503 100644
--- a/include/linux/lockdep.h
+++ b/include/linux/lockdep.h
-@@ -376,6 +376,8 @@ static inline int lockdep_match_key(struct lockdep_map *lock,
+@@ -244,6 +244,8 @@ static inline int lockdep_match_key(struct lockdep_map *lock,
return lock->key == key;
}
/*
* Acquire a lock.
*
-@@ -521,6 +523,7 @@ 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 35942084cd40d..24f5fd1a789de 100644
+index 8f882f5881e8..6b9808f09843 100644
--- a/include/linux/mnt_namespace.h
+++ b/include/linux/mnt_namespace.h
-@@ -6,12 +6,15 @@
+@@ -7,12 +7,15 @@ struct mnt_namespace;
struct fs_struct;
struct user_namespace;
struct ns_common;
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 ebbbfea48aa0b..d68d574250283 100644
+index a55179fd60fc..8e21c53cf883 100644
--- a/include/linux/splice.h
+++ b/include/linux/splice.h
-@@ -90,4 +90,10 @@ 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 ac10db66cc63f..837a3358e77ca 100644
+index f06b91ca6482..dedf7da3dd4a 100644
--- a/kernel/locking/lockdep.c
+++ b/kernel/locking/lockdep.c
-@@ -169,7 +169,7 @@ static
+@@ -217,7 +217,7 @@ unsigned long max_lock_class_idx;
struct lock_class lock_classes[MAX_LOCKDEP_KEYS];
- static DECLARE_BITMAP(lock_classes_in_use, MAX_LOCKDEP_KEYS);
+ DECLARE_BITMAP(lock_classes_in_use, MAX_LOCKDEP_KEYS);
-static inline struct lock_class *hlock_class(struct held_lock *hlock)
+inline struct lock_class *lockdep_hlock_class(struct held_lock *hlock)
{
unsigned int class_idx = hlock->class_idx;
-@@ -190,6 +190,7 @@ static inline struct lock_class *hlock_class(struct held_lock *hlock)
+@@ -238,6 +238,7 @@ static inline struct lock_class *hlock_class(struct held_lock *hlock)
*/
return lock_classes + class_idx;
}
aufs5.x-rcN mmap patch
diff --git a/fs/proc/base.c b/fs/proc/base.c
-index eb2255e95f62b..92f6062423c0c 100644
+index 8dfa36a99c74..548deeffe7d7 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
-@@ -2162,7 +2162,7 @@ static int map_files_get_link(struct dentry *dentry, struct path *path)
+@@ -2190,7 +2190,7 @@ 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 14c2badb8fd93..65afe5287e43e 100644
+index 13452b32e2bd..38acccfef9d4 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 8d382d4ec0672..93a768f754c91 100644
+index 2d04e3470d4c..f57a3bed280a 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
-@@ -280,7 +280,10 @@ show_map_vma(struct seq_file *m, struct vm_area_struct *vma)
+@@ -281,7 +281,10 @@ 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;
-@@ -1787,7 +1790,7 @@ static int show_numa_map(struct seq_file *m, void *v)
+@@ -1908,7 +1911,7 @@ 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 mempolicy *pol;
char buffer[64];
diff --git a/fs/proc/task_nommu.c b/fs/proc/task_nommu.c
-index 7907e6419e572..d17209cf52bc3 100644
+index a6d21fc0033c..02c2de31196e 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 f3fe7371855ce..a5b9751a5b331 100644
+index cf3d0d673f6b..6b3c1bdf9cde 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
-@@ -1688,6 +1688,28 @@ static inline void unmap_shared_mapping_range(struct address_space *mapping,
+@@ -1905,6 +1905,43 @@ static inline void unmap_shared_mapping_range(struct address_space *mapping,
unmap_mapping_range(mapping, holebegin, holelen, 0);
}
++#if IS_ENABLED(CONFIG_AUFS_FS)
+extern void vma_do_file_update_time(struct vm_area_struct *, const char[], int);
+extern struct file *vma_do_pr_or_file(struct vm_area_struct *, const char[],
+ int);
+ __LINE__)
+#define vmr_fput(region) vmr_do_fput(region, __func__, __LINE__)
+#endif /* !CONFIG_MMU */
++
++#else
++
++#define vma_file_update_time(vma) file_update_time((vma)->vm_file)
++#define vma_pr_or_file(vma) (vma)->vm_file
++#define vma_get_file(vma) get_file((vma)->vm_file)
++#define vma_fput(vma) fput((vma)->vm_file)
++
++#ifndef CONFIG_MMU
++#define vmr_pr_or_file(region) (region)->vm_file
++#define vmr_fput(region) fput((region)->vm_file)
++#endif /* !CONFIG_MMU */
++
++#endif /* CONFIG_AUFS_FS */
+
extern int access_process_vm(struct task_struct *tsk, unsigned long addr,
void *buf, int len, unsigned int gup_flags);
extern int access_remote_vm(struct mm_struct *mm, unsigned long addr,
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
-index 4aba6c0c2ba80..974802987f69d 100644
+index c29ab4c0cd5c..51753b926421 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
-@@ -272,6 +272,7 @@ struct vm_region {
+@@ -367,6 +367,9 @@ 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 */
++#if IS_ENABLED(CONFIG_AUFS_FS)
+ struct file *vm_prfile; /* the virtual backing file or NULL */
++#endif
int vm_usage; /* region usage count (access under nommu_region_sem) */
bool vm_icache_flushed : 1; /* true if the icache has been flushed for
-@@ -351,6 +352,7 @@ struct vm_area_struct {
+@@ -463,6 +466,9 @@ 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). */
++#if IS_ENABLED(CONFIG_AUFS_FS)
+ struct file *vm_prfile; /* shadow of vm_file */
++#endif
void * vm_private_data; /* was vm_pte (shared mem) */
#ifdef CONFIG_SWAP
diff --git a/kernel/fork.c b/kernel/fork.c
-index 48ed22774efaa..d7439388c1c52 100644
+index 9d44f2d46c69..089b21708b9a 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
-@@ -568,7 +568,7 @@ static __latent_entropy int dup_mmap(struct mm_struct *mm,
- struct inode *inode = file_inode(file);
+@@ -662,7 +662,7 @@ static __latent_entropy int dup_mmap(struct mm_struct *mm,
+ if (file) {
struct address_space *mapping = file->f_mapping;
- get_file(file);
+ vma_get_file(tmp);
- if (tmp->vm_flags & VM_DENYWRITE)
- atomic_dec(&inode->i_writecount);
i_mmap_lock_write(mapping);
+ if (tmp->vm_flags & VM_SHARED)
+ mapping_allow_writable(mapping);
diff --git a/mm/Makefile b/mm/Makefile
-index fccd3756b25f0..51485ceec650a 100644
+index 6f9ffa968a1a..f1e338fa3d10 100644
--- a/mm/Makefile
+++ b/mm/Makefile
-@@ -44,7 +44,7 @@ obj-y := filemap.o mempool.o oom_kill.o fadvise.o \
- mm_init.o mmu_context.o percpu.o slab_common.o \
- compaction.o vmacache.o \
- interval_tree.o list_lru.o workingset.o \
-- debug.o gup.o $(mmu-y)
-+ prfile.o debug.o gup.o $(mmu-y)
-
- # Give 'page_alloc' its own module-parameter namespace
- page-alloc-y := page_alloc.o
+@@ -133,3 +133,4 @@ obj-$(CONFIG_PAGE_REPORTING) += page_reporting.o
+ obj-$(CONFIG_IO_MAPPING) += io-mapping.o
+ obj-$(CONFIG_HAVE_BOOTMEM_INFO_NODE) += bootmem_info.o
+ obj-$(CONFIG_GENERIC_IOREMAP) += ioremap.o
++obj-$(CONFIG_AUFS_FS:m=y) += prfile.o
diff --git a/mm/filemap.c b/mm/filemap.c
-index 23a051a7ef0fb..e2fe9132feb21 100644
+index ffdfbc8b0e3c..2932f7020bfe 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
-@@ -2660,7 +2660,7 @@ vm_fault_t filemap_page_mkwrite(struct vm_fault *vmf)
+@@ -3431,7 +3431,7 @@ 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) {
- unlock_page(page);
+ folio_lock(folio);
+ if (folio->mapping != mapping) {
+ folio_unlock(folio);
diff --git a/mm/mmap.c b/mm/mmap.c
-index f609e9ec4a253..d554b349c653c 100644
+index 61e6135c54ef..9a3b117076a8 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
-@@ -179,7 +179,7 @@ static struct vm_area_struct *remove_vma(struct vm_area_struct *vma)
+@@ -189,7 +189,7 @@ 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;
-@@ -910,7 +910,7 @@ int __vma_adjust(struct vm_area_struct *vma, unsigned long start,
+@@ -958,7 +958,7 @@ 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);
-@@ -1831,8 +1831,8 @@ unsigned long mmap_region(struct file *file, unsigned long addr,
+@@ -1889,7 +1889,7 @@ 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);
-@@ -2683,7 +2683,7 @@ int __split_vma(struct mm_struct *mm, struct vm_area_struct *vma,
+@@ -2751,7 +2751,7 @@ 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);
-@@ -2702,7 +2702,7 @@ int __split_vma(struct mm_struct *mm, struct vm_area_struct *vma,
+@@ -2770,7 +2770,7 @@ 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));
-@@ -2894,7 +2894,7 @@ SYSCALL_DEFINE5(remap_file_pages, unsigned long, start, unsigned long, size,
- struct vm_area_struct *vma;
+@@ -2943,6 +2943,9 @@ SYSCALL_DEFINE5(remap_file_pages, unsigned long, start, unsigned long, size,
unsigned long populate = 0;
unsigned long ret = -EINVAL;
-- struct file *file;
-+ struct file *file, *prfile;
+ struct file *file;
++#if IS_ENABLED(CONFIG_AUFS_FS)
++ struct file *prfile;
++#endif
pr_warn_once("%s (%d) uses deprecated remap_file_pages() syscall. See Documentation/vm/remap_file_pages.rst.\n",
current->comm, current->pid);
-@@ -2969,10 +2969,27 @@ SYSCALL_DEFINE5(remap_file_pages, unsigned long, start, unsigned long, size,
- }
- }
+@@ -2998,10 +3001,34 @@ SYSCALL_DEFINE5(remap_file_pages, unsigned long, start, unsigned long, size,
+ if (vma->vm_flags & VM_LOCKED)
+ flags |= MAP_LOCKED;
-- file = get_file(vma->vm_file);
++#if IS_ENABLED(CONFIG_AUFS_FS)
+ vma_get_file(vma);
+ file = vma->vm_file;
+ prfile = vma->vm_prfile;
- ret = do_mmap_pgoff(vma->vm_file, start, size,
- prot, flags, pgoff, &populate, NULL);
++ 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;
+
+ * two fput()s instead of vma_fput(vma),
+ * coz vma may not be available anymore.
+ */
- fput(file);
++ fput(file);
+ if (prfile)
+ fput(prfile);
++#else
+ file = get_file(vma->vm_file);
+ ret = do_mmap(vma->vm_file, start, size,
+ prot, flags, pgoff, &populate, NULL);
+ fput(file);
++#endif /* CONFIG_AUFS_FS */
out:
- up_write(&mm->mmap_sem);
+ mmap_write_unlock(mm);
if (populate)
-@@ -3263,7 +3280,7 @@ struct vm_area_struct *copy_vma(struct vm_area_struct **vmap,
+@@ -3275,7 +3302,7 @@ 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 318df4e236c99..7f051e86ea1dd 100644
+index 9d7afc2d959e..917851d5b7c6 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
-@@ -567,7 +567,7 @@ static void __put_nommu_region(struct vm_region *region)
+@@ -524,7 +524,7 @@ 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 */
-@@ -699,7 +699,7 @@ static void delete_vma(struct mm_struct *mm, struct vm_area_struct *vma)
+@@ -656,7 +656,7 @@ 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);
}
-@@ -1222,7 +1222,7 @@ unsigned long do_mmap(struct file *file,
+@@ -1176,7 +1176,7 @@ unsigned long do_mmap(struct file *file,
goto error_just_free;
}
}
kmem_cache_free(vm_region_jar, region);
region = pregion;
result = start;
-@@ -1299,10 +1299,10 @@ unsigned long do_mmap(struct file *file,
+@@ -1253,10 +1253,10 @@ 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 0000000000000..00d51187c3250
+index 000000000000..511543ab1b41
--- /dev/null
+++ b/mm/prfile.c
@@ -0,0 +1,86 @@
+ *
+ * See Documentation/filesystems/aufs/design/06mmap.txt
+ *
-+ * Copyright (c) 2014-2020 Junjro R. Okajima
++ * Copyright (c) 2014-2021 Junjro R. Okajima
+ * Copyright (c) 2014 Ian Campbell
+ */
+
aufs5.x-rcN standalone patch
diff --git a/fs/dcache.c b/fs/dcache.c
-index 046000653e4d8..15aa871d1b450 100644
+index cddcf2e44930..8e24a158ef4f 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
-@@ -1371,6 +1371,7 @@ void d_walk(struct dentry *parent, void *data,
+@@ -1450,6 +1450,7 @@ void d_walk(struct dentry *parent, void *data,
seq = 1;
goto again;
}
struct check_mount {
struct vfsmount *mnt;
-@@ -2916,6 +2917,7 @@ void d_exchange(struct dentry *dentry1, struct dentry *dentry2)
+@@ -2996,6 +2997,7 @@ 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 2c465119affcc..239bcb8906e78 100644
+index 0989fb8472a1..040741a7fc1a 100644
--- a/fs/exec.c
+++ b/fs/exec.c
-@@ -109,6 +109,7 @@ bool path_noexec(const struct path *path)
+@@ -111,6 +111,7 @@ 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 0b28a37f7e505..f2c90a416b751 100644
+index 68457c0e1e6c..f6affcbcea4f 100644
--- a/fs/fcntl.c
+++ b/fs/fcntl.c
@@ -85,6 +85,7 @@ int setfl(int fd, struct file *filp, unsigned long arg)
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 30d55c9a1744a..34b9bbf4c5566 100644
+index 5424e3a8df5f..d2fe19f88894 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)
+@@ -198,6 +198,7 @@ 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.
-@@ -375,6 +376,7 @@ void __fput_sync(struct file *file)
- }
-
- EXPORT_SYMBOL(fput);
-+EXPORT_SYMBOL_GPL(__fput_sync);
-
- void __init files_init(void)
- {
-diff --git a/fs/inode.c b/fs/inode.c
-index 7700c5e4783b9..6284b41fcf3f0 100644
---- a/fs/inode.c
-+++ b/fs/inode.c
-@@ -1694,6 +1694,7 @@ 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
diff --git a/fs/namespace.c b/fs/namespace.c
-index 12e725e34c6ca..fa17b9d5926ba 100644
+index e0aa17f8c802..a8c5bed09874 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
-@@ -431,6 +431,7 @@ void __mnt_drop_write(struct vfsmount *mnt)
+@@ -456,6 +456,7 @@ 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)
+@@ -857,6 +858,7 @@ int is_current_mnt_ns(struct vfsmount *mnt)
{
return check_mnt(real_mount(mnt));
}
/*
* vfsmount lock must be held for write
-@@ -1903,6 +1905,7 @@ int iterate_mounts(int (*f)(struct vfsmount *, void *), void *arg,
+@@ -2060,6 +2062,7 @@ 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 133f723aca070..0b9f7f6d8390f 100644
+index 1de6631a3925..3008eb37a18d 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.
diff --git a/fs/open.c b/fs/open.c
-index 719b320ede52b..f88ce55c1c998 100644
+index 1d57fbde2feb..50d04ab40175 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,
+@@ -66,6 +66,7 @@ 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 5d684d7d29207..6f61c0b6aa664 100644
+index e0777eefd846..5e4413802f73 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
-@@ -469,6 +469,7 @@ ssize_t vfs_read(struct file *file, char __user *buf, size_t count, loff_t *pos)
-
+@@ -489,6 +489,7 @@ 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)
{
-@@ -509,6 +510,7 @@ vfs_readf_t vfs_readf(struct file *file)
- return new_sync_read;
- return ERR_PTR(-ENOSYS); /* doesn't have ->read(|_iter)() op */
- }
-+EXPORT_SYMBOL_GPL(vfs_readf);
-
- vfs_writef_t vfs_writef(struct file *file)
- {
-@@ -520,6 +522,7 @@ vfs_writef_t vfs_writef(struct file *file)
- return new_sync_write;
- return ERR_PTR(-ENOSYS); /* doesn't have ->write(|_iter)() op */
- }
-+EXPORT_SYMBOL_GPL(vfs_writef);
-
- ssize_t __kernel_write(struct file *file, const void *buf, size_t count, loff_t *pos)
- {
-@@ -589,6 +592,7 @@ ssize_t vfs_write(struct file *file, const char __user *buf, size_t count, loff_
-
+@@ -599,6 +600,7 @@ 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 9f230ee854e20..a6bd05004433c 100644
+index a21caa5c54c8..ccf9e1681eb7 100644
--- a/fs/splice.c
+++ b/fs/splice.c
-@@ -862,6 +862,7 @@ 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.
-@@ -891,6 +892,7 @@ 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 457f4e4a5cc1f..67c66358f3fe4 100644
---- a/fs/sync.c
-+++ b/fs/sync.c
-@@ -39,6 +39,7 @@ int __sync_filesystem(struct super_block *sb, int wait)
- sb->s_op->sync_fs(sb, wait);
- return __sync_blockdev(sb->s_bdev, wait);
- }
-+EXPORT_SYMBOL_GPL(__sync_filesystem);
-
- /*
- * Write out and wait upon all dirty data associated with this
diff --git a/fs/xattr.c b/fs/xattr.c
-index 91608d9bfc6aa..02d19ab3ba540 100644
+index e8dd03e4561e..fd922e39d42d 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,
+@@ -386,6 +386,7 @@ 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 837a3358e77ca..715ba9c1b91ae 100644
+index dedf7da3dd4a..2c74c70f4816 100644
--- a/kernel/locking/lockdep.c
+++ b/kernel/locking/lockdep.c
-@@ -190,6 +190,7 @@ inline struct lock_class *lockdep_hlock_class(struct held_lock *hlock)
+@@ -238,6 +238,7 @@ 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 825f28259a19a..b77593b29c1a5 100644
+index dff75bcde151..30b814618535 100644
--- a/kernel/task_work.c
+++ b/kernel/task_work.c
-@@ -126,3 +126,4 @@ void task_work_run(void)
+@@ -180,3 +180,4 @@ void task_work_run(void)
} while (work);
}
}
+EXPORT_SYMBOL_GPL(task_work_run);
diff --git a/security/security.c b/security/security.c
-index 51de970fbb1ed..b21f1ffd90051 100644
+index 188b8f782220..6847a174a55f 100644
--- a/security/security.c
+++ b/security/security.c
-@@ -1087,6 +1087,7 @@ int security_path_rmdir(const struct path *dir, struct dentry *dentry)
+@@ -1165,6 +1165,7 @@ 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)
{
-@@ -1103,6 +1104,7 @@ int security_path_symlink(const struct path *dir, struct dentry *dentry,
+@@ -1181,6 +1182,7 @@ 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)
-@@ -1111,6 +1113,7 @@ int security_path_link(struct dentry *old_dentry, const struct path *new_dir,
+@@ -1189,6 +1191,7 @@ 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,
-@@ -1138,6 +1141,7 @@ int security_path_truncate(const struct path *path)
+@@ -1209,6 +1212,7 @@ 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)
{
-@@ -1145,6 +1149,7 @@ int security_path_chmod(const struct path *path, umode_t mode)
+@@ -1216,6 +1220,7 @@ 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)
{
-@@ -1152,6 +1157,7 @@ int security_path_chown(const struct path *path, kuid_t uid, kgid_t gid)
+@@ -1223,6 +1228,7 @@ 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)
{
-@@ -1252,6 +1258,7 @@ int security_inode_permission(struct inode *inode, int mask)
+@@ -1323,6 +1329,7 @@ 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)
{
-@@ -1429,6 +1436,7 @@ int security_file_permission(struct file *file, int mask)
+@@ -1520,6 +1527,7 @@ 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 2022-08-02 12:12:45.158975302 +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 2022-08-02 12:12:45.158975302 +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 2020-01-27 10:57:18.162204582 +0100
++++ linux/Documentation/filesystems/aufs/design/01intro.txt 2022-08-02 12:12:45.158975302 +0200
@@ -0,0 +1,171 @@
+
-+# Copyright (C) 2005-2020 Junjiro R. Okajima
++# Copyright (C) 2005-2021 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 2020-01-27 10:57:18.162204582 +0100
++++ linux/Documentation/filesystems/aufs/design/02struct.txt 2022-08-02 12:12:45.162308621 +0200
@@ -0,0 +1,258 @@
+
-+# Copyright (C) 2005-2020 Junjiro R. Okajima
++# Copyright (C) 2005-2021 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 2020-01-27 10:57:18.162204582 +0100
++++ linux/Documentation/filesystems/aufs/design/03atomic_open.txt 2022-08-02 12:12:45.162308621 +0200
@@ -0,0 +1,85 @@
+
-+# Copyright (C) 2015-2020 Junjiro R. Okajima
++# Copyright (C) 2015-2021 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 2020-01-27 10:57:18.165538015 +0100
++++ linux/Documentation/filesystems/aufs/design/03lookup.txt 2022-08-02 12:12:45.162308621 +0200
@@ -0,0 +1,113 @@
+
-+# Copyright (C) 2005-2020 Junjiro R. Okajima
++# Copyright (C) 2005-2021 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 2020-01-27 10:57:18.165538015 +0100
++++ linux/Documentation/filesystems/aufs/design/04branch.txt 2022-08-02 12:12:45.162308621 +0200
@@ -0,0 +1,74 @@
+
-+# Copyright (C) 2005-2020 Junjiro R. Okajima
++# Copyright (C) 2005-2021 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 2020-01-27 10:57:18.165538015 +0100
++++ linux/Documentation/filesystems/aufs/design/05wbr_policy.txt 2022-08-02 12:12:45.162308621 +0200
@@ -0,0 +1,64 @@
+
-+# Copyright (C) 2005-2020 Junjiro R. Okajima
++# Copyright (C) 2005-2021 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 2022-08-02 12:12:45.162308621 +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 2020-01-27 10:57:18.165538015 +0100
++++ linux/Documentation/filesystems/aufs/design/06dirren.txt 2022-08-02 12:12:45.162308621 +0200
@@ -0,0 +1,102 @@
+
-+# Copyright (C) 2017-2020 Junjiro R. Okajima
++# Copyright (C) 2017-2021 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
+simply the inode-numbers on the branch. The file is created or updated
+in removing the branch, and loaded in adding the branch. Its lifetime is
+equal to the branch.
-+The list is refered in lookup, and when the current target inode is
++The list is referred in lookup, and when the current target inode is
+found in the list, the aufs tries loading the "detailed info per
+directory" and get the changed and valid name of the dir.
+
+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 2020-01-27 10:57:18.165538015 +0100
++++ linux/Documentation/filesystems/aufs/design/06fhsm.txt 2022-08-02 12:12:45.162308621 +0200
@@ -0,0 +1,120 @@
+
-+# Copyright (C) 2011-2020 Junjiro R. Okajima
++# Copyright (C) 2011-2021 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 2020-01-27 10:57:18.165538015 +0100
++++ linux/Documentation/filesystems/aufs/design/06mmap.txt 2022-08-02 12:12:45.162308621 +0200
@@ -0,0 +1,72 @@
+
-+# Copyright (C) 2005-2020 Junjiro R. Okajima
++# Copyright (C) 2005-2021 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 2020-01-27 10:57:18.165538015 +0100
++++ linux/Documentation/filesystems/aufs/design/06xattr.txt 2022-08-02 12:12:45.162308621 +0200
@@ -0,0 +1,96 @@
+
-+# Copyright (C) 2014-2020 Junjiro R. Okajima
++# Copyright (C) 2014-2021 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 2020-01-27 10:57:18.165538015 +0100
++++ linux/Documentation/filesystems/aufs/design/07export.txt 2022-08-02 12:12:45.162308621 +0200
@@ -0,0 +1,58 @@
+
-+# Copyright (C) 2005-2020 Junjiro R. Okajima
++# Copyright (C) 2005-2021 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 2020-01-27 10:57:18.165538015 +0100
++++ linux/Documentation/filesystems/aufs/design/08shwh.txt 2022-08-02 12:12:45.162308621 +0200
@@ -0,0 +1,52 @@
+
-+# Copyright (C) 2005-2020 Junjiro R. Okajima
++# Copyright (C) 2005-2021 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 2020-01-27 10:57:18.165538015 +0100
++++ linux/Documentation/filesystems/aufs/design/10dynop.txt 2022-08-02 12:12:45.162308621 +0200
@@ -0,0 +1,47 @@
+
-+# Copyright (C) 2010-2020 Junjiro R. Okajima
++# Copyright (C) 2010-2021 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 2020-01-23 09:59:36.748660743 +0100
-@@ -0,0 +1,401 @@
++++ linux/Documentation/filesystems/aufs/README 2022-08-02 12:12:45.158975302 +0200
+@@ -0,0 +1,397 @@
+
+Aufs5 -- advanced multi layered unification filesystem version 5.x
+http://aufs.sf.net
+For aufs5-linux tree,
+- enable CONFIG_AUFS_FS.
+- set other aufs configurations if necessary.
++- for aufs5.13 and later
++ Because aufs is not only an ordinary filesystem (callee of VFS), but
++ also a caller of VFS functions for branch filesystems, subclassing of
++ 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 customize some LOCKDEP numbers. Here are what I use on my
++ test environment.
++ CONFIG_LOCKDEP_BITS=21
++ CONFIG_LOCKDEP_CHAINS_BITS=21
++ CONFIG_LOCKDEP_STACK_TRACE_BITS=24
+
+For aufs5-standalone tree,
+There are several ways to build.
+ Supports a nested loopback mount in a branch-fs. This patch is
+ unnecessary until aufs produces a message like "you may want to try
+ another patch for loopback file".
-+- proc_mounts.patch
-+ When there are many mountpoints and many mount(2)/umount(2) are
-+ running, then /proc/mounts may not show the all mountpoints. This
-+ patch makes /proc/mounts always show the full mountpoints list.
-+ If you don't want to apply this patch and meet such problem, then you
-+ need to increase the value of 'ProcMounts_Times' make-variable in
-+ aufs-util.git as a second best solution.
+- vfs-ino.patch
+ Modifies a system global kernel internal function get_next_ino() in
+ order to stop assigning 0 for an inode-number. Not directly related to
+ duplication of inode number, which is important for backup tools and
+ other utilities. When you find aufs XINO files for tmpfs branch
+ growing too much, try this patch.
-+- lockdep-debug.patch
-+ Because aufs is not only an ordinary filesystem (callee of VFS), but
-+ also a caller of VFS functions for branch filesystems, subclassing of
-+ 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 you don't know what LOCKDEP is, then you don't have apply this
-+ patch.
+
+
+4. Usage
+The Parted Magic Project made a donation (2013/9 and 11).
+Pavel Barta made a donation (2013/10).
+Nikolay Pertsev made a donation (2014/5).
-+James B made a donation (2014/7 and 2015/7).
++James B made a donation (2014/7, 2015/7, and 2021/12).
+Stefano Di Biase made a donation (2014/8).
+Daniel Epellei made a donation (2015/1).
+OmegaPhil made a donation (2016/1, 2018/4).
+James Burry made a donation (2016/12).
+Carsten Rose made a donation (2018/9).
+Porteus Kiosk made a donation (2018/10).
++Enya Quetzalli Gomez Rodriguez made a donation (2022/5).
+
+Thank you very much.
+Donations are always, including future donations, very important and
+# 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 2020-01-27 10:57:18.165538015 +0100
++++ linux/fs/aufs/aufs.h 2022-08-02 12:12:45.162308621 +0200
@@ -0,0 +1,62 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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 2020-08-03 09:14:46.095748745 +0200
++++ linux/fs/aufs/branch.c 2022-08-02 12:12:45.162308621 +0200
@@ -0,0 +1,1427 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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
+ * file_release_write() for each file, because the branch
+ * attribute in aufs world is totally different from the native
+ * fs rw/ro mode.
-+ */
++ */
+ /* fi_read_lock(file); */
+ hfile = &au_fi(file)->fi_htop;
+ hf = hfile->hf_file;
+}
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 2020-01-27 10:57:18.165538015 +0100
-@@ -0,0 +1,366 @@
++++ linux/fs/aufs/branch.h 2022-08-02 12:12:45.162308621 +0200
+@@ -0,0 +1,375 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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 2022-08-02 12:12:45.162308621 +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 2020-01-27 10:57:18.165538015 +0100
-@@ -0,0 +1,1458 @@
++++ linux/fs/aufs/cpup.c 2022-08-02 12:12:45.162308621 +0200
+@@ -0,0 +1,1459 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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);
+{
+ int err;
+ struct dentry *dentry, *h_dentry, *h_parent, *parent;
++ struct path h_ppath;
+ struct inode *h_dir;
+ aufs_bindex_t bdst;
+
+ dentry = cpg->dentry;
+ bdst = cpg->bdst;
++ h_ppath.mnt = au_sbr_mnt(dentry->d_sb, bdst);
+ h_dentry = au_h_dptr(dentry, bdst);
+ if (!au_ftest_cpup(cpg->flags, OVERWRITE)) {
+ dget(h_dentry);
+ } else {
+ err = 0;
+ parent = dget_parent(dentry);
-+ h_parent = au_h_dptr(parent, bdst);
++ h_ppath.dentry = au_h_dptr(parent, bdst);
+ dput(parent);
-+ h_path->dentry = vfsub_lkup_one(&dentry->d_name, h_parent);
++ h_path->dentry = vfsub_lkup_one(&dentry->d_name, &h_ppath);
+ if (IS_ERR(h_path->dentry))
+ err = PTR_ERR(h_path->dentry);
+ }
+ 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 2020-01-27 10:57:18.168871450 +0100
++++ linux/fs/aufs/cpup.h 2022-08-02 12:12:45.162308621 +0200
@@ -0,0 +1,100 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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 2020-01-27 10:57:18.168871450 +0100
++++ linux/fs/aufs/dbgaufs.c 2022-08-02 12:12:45.162308621 +0200
@@ -0,0 +1,526 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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 2020-01-27 10:57:18.168871450 +0100
++++ linux/fs/aufs/dbgaufs.h 2022-08-02 12:12:45.162308621 +0200
@@ -0,0 +1,53 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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 2020-01-27 10:57:18.168871450 +0100
++++ linux/fs/aufs/dcsub.c 2022-08-02 12:12:45.162308621 +0200
@@ -0,0 +1,225 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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 2020-01-27 10:57:18.168871450 +0100
++++ linux/fs/aufs/dcsub.h 2022-08-02 12:12:45.162308621 +0200
@@ -0,0 +1,137 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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 2020-01-27 10:57:18.168871450 +0100
-@@ -0,0 +1,441 @@
++++ linux/fs/aufs/debug.c 2022-08-02 12:12:45.162308621 +0200
+@@ -0,0 +1,444 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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 sprintf(buffer, "%d", atomic_read(a));
+}
+
-+static struct kernel_param_ops param_ops_atomic_t = {
++static const struct kernel_param_ops param_ops_atomic_t = {
+ .set = param_atomic_t_set,
+ .get = param_atomic_t_get
+ /* void (*free)(void *arg) */
+ AuDbgDentry(dentry);
+ AuDbgInode(inode);
+ au_debug_off();
-+ BUG();
++ if (au_test_fuse(h_inode->i_sb))
++ WARN_ON_ONCE(1);
++ else
++ BUG();
+ }
+ }
+}
+}
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 2020-01-27 10:57:18.168871450 +0100
++++ linux/fs/aufs/debug.h 2022-08-02 12:12:45.162308621 +0200
@@ -0,0 +1,226 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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 2020-01-27 10:57:18.168871450 +0100
-@@ -0,0 +1,1154 @@
++++ linux/fs/aufs/dentry.c 2022-08-02 12:12:45.162308621 +0200
+@@ -0,0 +1,1168 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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
+ */
+
+#include <linux/iversion.h>
-+#include <linux/namei.h>
+#include "aufs.h"
+
+/*
+ struct dentry *h_dentry;
+ struct inode *h_inode;
+ struct au_branch *br;
++ struct user_namespace *h_userns;
++ struct path h_path;
+ 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_path.dentry = h_parent;
++ h_path.mnt = au_br_mnt(br);
++ 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_path, &args->whname,
++ ignore_perm);
+ h_dentry = ERR_PTR(wh_found);
+ if (!wh_found)
+ goto real_lookup;
+
+real_lookup:
+ if (!ignore_perm)
-+ h_dentry = vfsub_lkup_one(args->name, h_parent);
++ h_dentry = vfsub_lkup_one(args->name, &h_path);
+ else
-+ h_dentry = au_sio_lkup_one(args->name, h_parent);
++ h_dentry = au_sio_lkup_one(h_userns, args->name, &h_path);
+ if (IS_ERR(h_dentry)) {
+ if (PTR_ERR(h_dentry) == -ENAMETOOLONG
+ && !allow_neg)
+ || (d_really_is_positive(dentry) && !d_is_dir(dentry)))
+ goto out; /* success */
+
++ h_path.dentry = h_dentry;
+ inode_lock_shared_nested(h_inode, AuLsc_I_CHILD);
-+ opq = au_diropq_test(h_dentry);
++ opq = au_diropq_test(h_userns, &h_path);
+ 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 path *ppath)
+{
+ struct dentry *dentry;
+ int wkq_err;
+
-+ if (!au_test_h_perm_sio(d_inode(parent), MAY_EXEC))
-+ dentry = vfsub_lkup_one(name, parent);
++ if (!au_test_h_perm_sio(userns, d_inode(ppath->dentry), MAY_EXEC))
++ dentry = vfsub_lkup_one(name, ppath);
+ else {
+ struct vfsub_lkup_one_args args = {
+ .errp = &dentry,
+ .name = name,
-+ .parent = parent
++ .ppath = ppath
+ };
+
+ wkq_err = au_wkq_wait(vfsub_call_lkup_one, &args);
+int au_lkup_neg(struct dentry *dentry, aufs_bindex_t bindex, int wh)
+{
+ int err;
-+ struct dentry *parent, *h_parent, *h_dentry;
++ struct dentry *parent, *h_dentry;
+ struct au_branch *br;
++ struct user_namespace *h_userns;
++ struct path h_ppath;
+
+ parent = dget_parent(dentry);
-+ h_parent = au_h_dptr(parent, bindex);
+ br = au_sbr(dentry->d_sb, bindex);
++ h_ppath.dentry = au_h_dptr(parent, bindex);
++ h_ppath.mnt = au_br_mnt(br);
++ h_userns = au_br_userns(br);
+ if (wh)
-+ h_dentry = au_whtmp_lkup(h_parent, br, &dentry->d_name);
++ h_dentry = au_whtmp_lkup(h_ppath.dentry, 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_ppath);
+ err = PTR_ERR(h_dentry);
+ if (IS_ERR(h_dentry))
+ goto out;
+ struct inode *h_inode;
+ struct dentry *h_d;
+ struct super_block *h_sb;
++ struct path h_ppath;
+
+ err = 0;
+ memset(&ia, -1, sizeof(ia));
+ goto out;
+
+ /* main purpose is namei.c:cached_lookup() and d_revalidate */
-+ h_d = vfsub_lkup_one(&h_dentry->d_name, h_parent);
++ h_ppath.dentry = h_parent;
++ h_ppath.mnt = au_br_mnt(br);
++ h_d = vfsub_lkup_one(&h_dentry->d_name, &h_ppath);
+ err = PTR_ERR(h_d);
+ if (IS_ERR(h_d))
+ 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 2020-01-27 10:57:18.168871450 +0100
-@@ -0,0 +1,268 @@
++++ linux/fs/aufs/dentry.h 2022-08-02 12:12:45.162308621 +0200
+@@ -0,0 +1,269 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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 path *ppath);
+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 2020-01-27 10:57:18.168871450 +0100
++++ linux/fs/aufs/dinfo.c 2022-08-02 12:12:45.162308621 +0200
@@ -0,0 +1,554 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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 2020-01-27 10:57:18.168871450 +0100
-@@ -0,0 +1,763 @@
++++ linux/fs/aufs/dir.c 2022-08-02 12:12:45.162308621 +0200
+@@ -0,0 +1,765 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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 2020-08-03 09:14:46.095748745 +0200
++++ linux/fs/aufs/dir.h 2022-08-02 12:12:45.162308621 +0200
@@ -0,0 +1,134 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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_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 2020-08-03 09:14:46.095748745 +0200
-@@ -0,0 +1,1316 @@
++++ linux/fs/aufs/dirren.c 2022-08-02 12:12:45.165641939 +0200
+@@ -0,0 +1,1315 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2017-2020 Junjiro R. Okajima
++ * Copyright (C) 2017-2021 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
+ dir = d_inode(path->dentry);
+ inode_lock_nested(dir, AuLsc_I_CHILD);
+ }
-+ hinopath.dentry = vfsub_lkup_one(&hinoname, path->dentry);
++ hinopath.mnt = path->mnt;
++ hinopath.dentry = vfsub_lkup_one(&hinoname, (struct path *)path);
+ err = PTR_ERR(hinopath.dentry);
+ if (IS_ERR(hinopath.dentry))
+ goto out_unlock;
+ }
+ flags = O_WRONLY;
+ }
-+ hinopath.mnt = path->mnt;
+ hinofile = vfsub_dentry_open(&hinopath, flags);
+ if (suspend)
+ au_hn_inode_unlock(hdir);
+ AuDebugOn(elm
+ && memcmp(elm, page_address(ZERO_PAGE(0)), sizeof(*elm)));
+
-+ infopath.dentry = vfsub_lookup_one_len(w->whname, w->h_ppath.dentry,
++ infopath.dentry = vfsub_lookup_one_len(w->whname, &w->h_ppath,
+ w->whnamelen);
+ AuTraceErrPtr(infopath.dentry);
+ if (IS_ERR(infopath.dentry)) {
+ unlocked = 0;
+ h_dir = d_inode(h_ppath->dentry);
+ inode_lock_shared_nested(h_dir, AuLsc_I_PARENT);
-+ infopath.dentry = vfsub_lookup_one_len(whname, h_ppath->dentry,
-+ whnamelen);
++ infopath.dentry = vfsub_lookup_one_len(whname, h_ppath, whnamelen);
+ if (IS_ERR(infopath.dentry)) {
+ drinfo = (void *)infopath.dentry;
+ 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 2020-01-27 10:57:18.168871450 +0100
++++ linux/fs/aufs/dirren.h 2022-08-02 12:12:45.165641939 +0200
@@ -0,0 +1,140 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2017-2020 Junjiro R. Okajima
++ * Copyright (C) 2017-2021 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 2020-01-27 10:57:18.168871450 +0100
-@@ -0,0 +1,367 @@
++++ linux/fs/aufs/dynop.c 2022-08-02 12:12:45.165641939 +0200
+@@ -0,0 +1,368 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2010-2020 Junjiro R. Okajima
++ * Copyright (C) 2010-2021 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
+ AuDbg("%s\n", au_sbtype(h_sb));
+
+ DySetAop(writepage);
-+ DySetAopForce(readpage); /* force */
++ DySetAopForce(read_folio); /* force */
+ DySetAop(writepages);
-+ DySetAop(set_page_dirty);
-+ DySetAop(readpages);
++ DySetAop(dirty_folio);
++ DySetAop(invalidate_folio);
++ DySetAop(readahead);
+ DySetAop(write_begin);
+ DySetAop(write_end);
+ DySetAop(bmap);
-+ DySetAop(invalidatepage);
-+ DySetAop(releasepage);
-+ DySetAop(freepage);
++ DySetAop(release_folio);
++ DySetAop(free_folio);
+ /* this one will be changed according to an aufs mount option */
+ DySetAop(direct_IO);
+ DySetAop(migratepage);
+ DySetAop(isolate_page);
+ DySetAop(putback_page);
-+ DySetAop(launder_page);
++ DySetAop(launder_folio);
+ DySetAop(is_partially_uptodate);
+ DySetAop(is_dirty_writeback);
+ DySetAop(error_remove_page);
+ DySetAop(swap_activate);
+ DySetAop(swap_deactivate);
++ DySetAop(swap_rw);
+
+ DyDbgSize(cnt, *h_aop);
+}
+}
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 2020-01-27 10:57:18.168871450 +0100
++++ linux/fs/aufs/dynop.h 2022-08-02 12:12:45.165641939 +0200
@@ -0,0 +1,77 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2010-2020 Junjiro R. Okajima
++ * Copyright (C) 2010-2021 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 2020-01-27 10:57:18.168871450 +0100
-@@ -0,0 +1,838 @@
++++ linux/fs/aufs/export.c 2022-08-02 12:12:45.165641939 +0200
+@@ -0,0 +1,830 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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
+
+#include <linux/exportfs.h>
+#include <linux/fs_struct.h>
-+#include <linux/namei.h>
+#include <linux/nsproxy.h>
+#include <linux/random.h>
+#include <linux/writeback.h>
+ 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 */
+
+ /* do not call vfsub_lkup_one() */
+ dir = d_inode(parent);
-+ dentry = vfsub_lookup_one_len_unlocked(arg.name, parent, arg.namelen);
++ dentry = vfsub_lookup_one_len_unlocked(arg.name, path, arg.namelen);
+ AuTraceErrPtr(dentry);
+ if (IS_ERR(dentry))
+ goto out_name;
+ f = h_inode->i_sb->s_export_op->commit_metadata;
+ if (f)
+ err = f(h_inode);
-+ else {
-+ struct writeback_control wbc = {
-+ .sync_mode = WB_SYNC_ALL,
-+ .nr_to_write = 0 /* metadata only */
-+ };
-+
-+ err = sync_inode(h_inode, &wbc);
-+ }
++ else
++ err = sync_inode_metadata(h_inode, /*wait*/1);
+
+ au_cpup_attr_timesizes(inode);
+ ii_write_unlock(inode);
+}
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 2020-01-27 10:57:18.172204883 +0100
++++ linux/fs/aufs/fhsm.c 2022-08-02 12:12:45.165641939 +0200
@@ -0,0 +1,427 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2011-2020 Junjiro R. Okajima
++ * Copyright (C) 2011-2021 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 2020-01-27 10:57:18.172204883 +0100
-@@ -0,0 +1,863 @@
++++ linux/fs/aufs/file.c 2022-08-02 12:12:45.165641939 +0200
+@@ -0,0 +1,864 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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
+
+/* cf. aufs_nopage() */
+/* for madvise(2) */
-+static int aufs_readpage(struct file *file __maybe_unused, struct page *page)
++static int aufs_read_folio(struct file *file __maybe_unused, struct folio *folio)
+{
-+ unlock_page(page);
++ folio_unlock(folio);
+ return 0;
+}
+
+/* they will never be called. */
+#ifdef CONFIG_AUFS_DEBUG
+static int aufs_write_begin(struct file *file, struct address_space *mapping,
-+ loff_t pos, unsigned len, unsigned flags,
++ loff_t pos, unsigned len,
+ struct page **pagep, void **fsdata)
+{ AuUnsupport(); return 0; }
+static int aufs_write_end(struct file *file, struct address_space *mapping,
+static int aufs_writepage(struct page *page, struct writeback_control *wbc)
+{ AuUnsupport(); return 0; }
+
-+static int aufs_set_page_dirty(struct page *page)
-+{ AuUnsupport(); return 0; }
-+static void aufs_invalidatepage(struct page *page, unsigned int offset,
-+ unsigned int length)
++static bool aufs_dirty_folio(struct address_space *mapping, struct folio *folio)
++{ AuUnsupport(); return true; }
++static void aufs_invalidate_folio(struct folio *folio, size_t offset, size_t len)
+{ AuUnsupport(); }
-+static int aufs_releasepage(struct page *page, gfp_t gfp)
-+{ AuUnsupport(); return 0; }
++static bool aufs_release_folio(struct folio *folio, gfp_t gfp)
++{ AuUnsupport(); return true; }
+#if 0 /* called by memory compaction regardless file */
+static int aufs_migratepage(struct address_space *mapping, struct page *newpage,
+ struct page *page, enum migrate_mode mode)
+{ AuUnsupport(); return true; }
+static void aufs_putback_page(struct page *page)
+{ AuUnsupport(); }
-+static int aufs_launder_page(struct page *page)
-+{ AuUnsupport(); return 0; }
-+static int aufs_is_partially_uptodate(struct page *page,
-+ unsigned long from,
-+ unsigned long count)
++static int aufs_launder_folio(struct folio *folio)
+{ AuUnsupport(); return 0; }
-+static void aufs_is_dirty_writeback(struct page *page, bool *dirty,
++static bool aufs_is_partially_uptodate(struct folio *folio, size_t from,
++ size_t count)
++{ AuUnsupport(); return true; }
++static void aufs_is_dirty_writeback(struct folio *folio, bool *dirty,
+ bool *writeback)
+{ AuUnsupport(); }
+static int aufs_error_remove_page(struct address_space *mapping,
+{ AuUnsupport(); return 0; }
+static void aufs_swap_deactivate(struct file *file)
+{ AuUnsupport(); }
++static int aufs_swap_rw(struct kiocb *iocb, struct iov_iter *iter)
++{ AuUnsupport(); return 0; }
+#endif /* CONFIG_AUFS_DEBUG */
+
+const struct address_space_operations aufs_aop = {
-+ .readpage = aufs_readpage,
++ .read_folio = aufs_read_folio,
+ .direct_IO = aufs_direct_IO,
+#ifdef CONFIG_AUFS_DEBUG
+ .writepage = aufs_writepage,
+ /* no writepages, because of writepage */
-+ .set_page_dirty = aufs_set_page_dirty,
++ .dirty_folio = aufs_dirty_folio,
+ /* no readpages, because of readpage */
+ .write_begin = aufs_write_begin,
+ .write_end = aufs_write_end,
+ /* no bmap, no block device */
-+ .invalidatepage = aufs_invalidatepage,
-+ .releasepage = aufs_releasepage,
++ .invalidate_folio = aufs_invalidate_folio,
++ .release_folio = aufs_release_folio,
+ /* is fallback_migrate_page ok? */
+ /* .migratepage = aufs_migratepage, */
+ .isolate_page = aufs_isolate_page,
+ .putback_page = aufs_putback_page,
-+ .launder_page = aufs_launder_page,
++ .launder_folio = aufs_launder_folio,
+ .is_partially_uptodate = aufs_is_partially_uptodate,
+ .is_dirty_writeback = aufs_is_dirty_writeback,
+ .error_remove_page = aufs_error_remove_page,
+ .swap_activate = aufs_swap_activate,
-+ .swap_deactivate = aufs_swap_deactivate
++ .swap_deactivate = aufs_swap_deactivate,
++ .swap_rw = aufs_swap_rw
+#endif /* CONFIG_AUFS_DEBUG */
+};
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 2020-01-27 10:57:18.172204883 +0100
++++ linux/fs/aufs/file.h 2022-08-02 12:12:45.165641939 +0200
@@ -0,0 +1,342 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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 2020-01-27 10:57:18.172204883 +0100
++++ linux/fs/aufs/finfo.c 2022-08-02 12:12:45.165641939 +0200
@@ -0,0 +1,149 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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 2020-01-27 10:57:18.172204883 +0100
-@@ -0,0 +1,819 @@
++++ linux/fs/aufs/f_op.c 2022-08-02 12:12:45.165641939 +0200
+@@ -0,0 +1,771 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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)
+{
+ 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)
+
+ .llseek = default_llseek,
+
-+ .read = aufs_read,
-+ .write = aufs_write,
+ .read_iter = aufs_read_iter,
+ .write_iter = aufs_write_iter,
+
+ .fallocate = aufs_fallocate,
+ .copy_file_range = aufs_copy_file_range
+};
-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 2020-01-27 10:57:18.172204883 +0100
-@@ -0,0 +1,401 @@
-+/* SPDX-License-Identifier: GPL-2.0 */
+diff -urN /usr/share/empty/fs/aufs/fsctx.c linux/fs/aufs/fsctx.c
+--- /usr/share/empty/fs/aufs/fsctx.c 1970-01-01 01:00:00.000000000 +0100
++++ linux/fs/aufs/fsctx.c 2022-08-02 12:12:45.165641939 +0200
+@@ -0,0 +1,1242 @@
++// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2022 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
+ */
+
+/*
-+ * judging filesystem type
++ * fs context, aka new mount api
+ */
+
-+#ifndef __AUFS_FSTYPE_H__
-+#define __AUFS_FSTYPE_H__
-+
-+#ifdef __KERNEL__
-+
-+#include <linux/fs.h>
-+#include <linux/magic.h>
-+#include <linux/nfs_fs.h>
-+#include <linux/romfs_fs.h>
-+
-+static inline int au_test_aufs(struct super_block *sb)
-+{
-+ return sb->s_magic == AUFS_SUPER_MAGIC;
-+}
++#include <linux/fs_context.h>
++#include "aufs.h"
+
-+static inline const char *au_sbtype(struct super_block *sb)
-+{
-+ return sb->s_type->name;
-+}
++struct au_fsctx_opts {
++ aufs_bindex_t bindex;
++ unsigned char skipped;
++ struct au_opt *opt, *opt_tail;
++ struct super_block *sb;
++ struct au_sbinfo *sbinfo;
++ struct au_opts opts;
++};
+
-+static inline int au_test_iso9660(struct super_block *sb __maybe_unused)
++/* stop extra interpretation of errno in mount(8), and strange error messages */
++static int cvt_err(int err)
+{
-+#if IS_ENABLED(CONFIG_ISO9660_FS)
-+ return sb->s_magic == ISOFS_SUPER_MAGIC;
-+#else
-+ return 0;
-+#endif
-+}
++ AuTraceErr(err);
+
-+static inline int au_test_romfs(struct super_block *sb __maybe_unused)
-+{
-+#if IS_ENABLED(CONFIG_ROMFS_FS)
-+ return sb->s_magic == ROMFS_MAGIC;
-+#else
-+ return 0;
-+#endif
++ switch (err) {
++ case -ENOENT:
++ case -ENOTDIR:
++ case -EEXIST:
++ case -EIO:
++ err = -EINVAL;
++ }
++ return err;
+}
+
-+static inline int au_test_cramfs(struct super_block *sb __maybe_unused)
++static int au_fsctx_reconfigure(struct fs_context *fc)
+{
-+#if IS_ENABLED(CONFIG_CRAMFS)
-+ return sb->s_magic == CRAMFS_MAGIC;
-+#endif
-+ return 0;
-+}
++ int err, do_dx;
++ unsigned int mntflags;
++ struct dentry *root;
++ struct super_block *sb;
++ struct inode *inode;
++ struct au_fsctx_opts *a = fc->fs_private;
+
-+static inline int au_test_nfs(struct super_block *sb __maybe_unused)
-+{
-+#if IS_ENABLED(CONFIG_NFS_FS)
-+ return sb->s_magic == NFS_SUPER_MAGIC;
-+#else
-+ return 0;
-+#endif
-+}
++ AuDbg("fc %p\n", fc);
+
-+static inline int au_test_fuse(struct super_block *sb __maybe_unused)
-+{
-+#if IS_ENABLED(CONFIG_FUSE_FS)
-+ return sb->s_magic == FUSE_SUPER_MAGIC;
-+#else
-+ return 0;
-+#endif
-+}
++ root = fc->root;
++ sb = root->d_sb;
++ err = si_write_lock(sb, AuLock_FLUSH | AuLock_NOPLM);
++ if (!err) {
++ di_write_lock_child(root);
++ err = au_opts_verify(sb, fc->sb_flags, /*pending*/0);
++ aufs_write_unlock(root);
++ }
+
-+static inline int au_test_xfs(struct super_block *sb __maybe_unused)
-+{
-+#if IS_ENABLED(CONFIG_XFS_FS)
-+ return sb->s_magic == XFS_SB_MAGIC;
-+#else
-+ return 0;
-+#endif
-+}
++ inode = d_inode(root);
++ inode_lock(inode);
++ err = si_write_lock(sb, AuLock_FLUSH | AuLock_NOPLM);
++ if (unlikely(err))
++ goto out;
++ di_write_lock_child(root);
+
-+static inline int au_test_tmpfs(struct super_block *sb __maybe_unused)
-+{
-+#ifdef CONFIG_TMPFS
-+ return sb->s_magic == TMPFS_MAGIC;
-+#else
-+ return 0;
-+#endif
-+}
++ /* au_opts_remount() may return an error */
++ err = au_opts_remount(sb, &a->opts);
+
-+static inline int au_test_ecryptfs(struct super_block *sb __maybe_unused)
-+{
-+#if IS_ENABLED(CONFIG_ECRYPT_FS)
-+ return !strcmp(au_sbtype(sb), "ecryptfs");
-+#else
-+ return 0;
-+#endif
-+}
++ if (au_ftest_opts(a->opts.flags, REFRESH))
++ au_remount_refresh(sb, au_ftest_opts(a->opts.flags,
++ REFRESH_IDOP));
+
-+static inline int au_test_ramfs(struct super_block *sb)
-+{
-+ return sb->s_magic == RAMFS_MAGIC;
-+}
++ if (au_ftest_opts(a->opts.flags, REFRESH_DYAOP)) {
++ mntflags = au_mntflags(sb);
++ do_dx = !!au_opt_test(mntflags, DIO);
++ au_dy_arefresh(do_dx);
++ }
+
-+static inline int au_test_ubifs(struct super_block *sb __maybe_unused)
-+{
-+#if IS_ENABLED(CONFIG_UBIFS_FS)
-+ return sb->s_magic == UBIFS_SUPER_MAGIC;
-+#else
-+ return 0;
-+#endif
-+}
++ au_fhsm_wrote_all(sb, /*force*/1); /* ?? */
++ aufs_write_unlock(root);
+
-+static inline int au_test_procfs(struct super_block *sb __maybe_unused)
-+{
-+#ifdef CONFIG_PROC_FS
-+ return sb->s_magic == PROC_SUPER_MAGIC;
-+#else
-+ return 0;
-+#endif
-+}
++out:
++ inode_unlock(inode);
++ err = cvt_err(err);
++ AuTraceErr(err);
+
-+static inline int au_test_sysfs(struct super_block *sb __maybe_unused)
-+{
-+#ifdef CONFIG_SYSFS
-+ return sb->s_magic == SYSFS_MAGIC;
-+#else
-+ return 0;
-+#endif
++ return err;
+}
+
-+static inline int au_test_configfs(struct super_block *sb __maybe_unused)
-+{
-+#if IS_ENABLED(CONFIG_CONFIGFS_FS)
-+ return sb->s_magic == CONFIGFS_MAGIC;
-+#else
-+ return 0;
-+#endif
-+}
++/* ---------------------------------------------------------------------- */
+
-+static inline int au_test_minix(struct super_block *sb __maybe_unused)
++static int au_fsctx_fill_super(struct super_block *sb, struct fs_context *fc)
+{
-+#if IS_ENABLED(CONFIG_MINIX_FS)
-+ return sb->s_magic == MINIX3_SUPER_MAGIC
-+ || sb->s_magic == MINIX2_SUPER_MAGIC
-+ || sb->s_magic == MINIX2_SUPER_MAGIC2
-+ || sb->s_magic == MINIX_SUPER_MAGIC
-+ || sb->s_magic == MINIX_SUPER_MAGIC2;
-+#else
-+ return 0;
-+#endif
-+}
++ int err;
++ struct au_fsctx_opts *a = fc->fs_private;
++ struct au_sbinfo *sbinfo = a->sbinfo;
++ struct dentry *root;
++ struct inode *inode;
+
-+static inline int au_test_fat(struct super_block *sb __maybe_unused)
-+{
-+#if IS_ENABLED(CONFIG_FAT_FS)
-+ return sb->s_magic == MSDOS_SUPER_MAGIC;
-+#else
-+ return 0;
-+#endif
-+}
++ sbinfo->si_sb = sb;
++ sb->s_fs_info = sbinfo;
++ kobject_get(&sbinfo->si_kobj);
+
-+static inline int au_test_msdos(struct super_block *sb)
-+{
-+ return au_test_fat(sb);
-+}
++ __si_write_lock(sb);
++ si_pid_set(sb);
++ au_sbilist_add(sb);
+
-+static inline int au_test_vfat(struct super_block *sb)
-+{
-+ return au_test_fat(sb);
-+}
++ /* all timestamps always follow the ones on the branch */
++ sb->s_flags |= SB_NOATIME | SB_NODIRATIME;
++ sb->s_flags |= SB_I_VERSION; /* do we really need this? */
++ sb->s_op = &aufs_sop;
++ sb->s_d_op = &aufs_dop;
++ sb->s_magic = AUFS_SUPER_MAGIC;
++ sb->s_maxbytes = 0;
++ sb->s_stack_depth = 1;
++ au_export_init(sb);
++ au_xattr_init(sb);
+
-+static inline int au_test_securityfs(struct super_block *sb __maybe_unused)
-+{
-+#ifdef CONFIG_SECURITYFS
-+ return sb->s_magic == SECURITYFS_MAGIC;
-+#else
-+ return 0;
-+#endif
-+}
++ err = au_alloc_root(sb);
++ if (unlikely(err)) {
++ si_write_unlock(sb);
++ goto out;
++ }
++ root = sb->s_root;
++ inode = d_inode(root);
++ ii_write_lock_parent(inode);
++ aufs_write_unlock(root);
+
-+static inline int au_test_squashfs(struct super_block *sb __maybe_unused)
-+{
-+#if IS_ENABLED(CONFIG_SQUASHFS)
-+ return sb->s_magic == SQUASHFS_MAGIC;
-+#else
-+ return 0;
-+#endif
-+}
++ /* lock vfs_inode first, then aufs. */
++ inode_lock(inode);
++ aufs_write_lock(root);
++ err = au_opts_mount(sb, &a->opts);
++ AuTraceErr(err);
++ if (!err && au_ftest_si(sbinfo, NO_DREVAL)) {
++ sb->s_d_op = &aufs_dop_noreval;
++ /* infofc(fc, "%ps", sb->s_d_op); */
++ pr_info("%ps\n", sb->s_d_op);
++ au_refresh_dop(root, /*force_reval*/0);
++ sbinfo->si_iop_array = aufs_iop_nogetattr;
++ au_refresh_iop(inode, /*force_getattr*/0);
++ }
++ aufs_write_unlock(root);
++ inode_unlock(inode);
++ if (!err)
++ goto out; /* success */
+
-+static inline int au_test_btrfs(struct super_block *sb __maybe_unused)
-+{
-+#if IS_ENABLED(CONFIG_BTRFS_FS)
-+ return sb->s_magic == BTRFS_SUPER_MAGIC;
-+#else
-+ return 0;
-+#endif
-+}
++ dput(root);
++ sb->s_root = NULL;
+
-+static inline int au_test_xenfs(struct super_block *sb __maybe_unused)
-+{
-+#if IS_ENABLED(CONFIG_XENFS)
-+ return sb->s_magic == XENFS_SUPER_MAGIC;
-+#else
-+ return 0;
-+#endif
++out:
++ if (unlikely(err))
++ kobject_put(&sbinfo->si_kobj);
++ AuTraceErr(err);
++ err = cvt_err(err);
++ AuTraceErr(err);
++ return err;
+}
+
-+static inline int au_test_debugfs(struct super_block *sb __maybe_unused)
++static int au_fsctx_get_tree(struct fs_context *fc)
+{
-+#ifdef CONFIG_DEBUG_FS
-+ return sb->s_magic == DEBUGFS_MAGIC;
-+#else
-+ return 0;
-+#endif
-+}
++ int err;
+
-+static inline int au_test_nilfs(struct super_block *sb __maybe_unused)
-+{
-+#if IS_ENABLED(CONFIG_NILFS)
-+ return sb->s_magic == NILFS_SUPER_MAGIC;
-+#else
-+ return 0;
-+#endif
-+}
++ AuDbg("fc %p\n", fc);
++ err = get_tree_nodev(fc, au_fsctx_fill_super);
+
-+static inline int au_test_hfsplus(struct super_block *sb __maybe_unused)
-+{
-+#if IS_ENABLED(CONFIG_HFSPLUS_FS)
-+ return sb->s_magic == HFSPLUS_SUPER_MAGIC;
-+#else
-+ return 0;
-+#endif
++ AuTraceErr(err);
++ return err;
+}
+
+/* ---------------------------------------------------------------------- */
-+/*
-+ * they can't be an aufs branch.
-+ */
-+static inline int au_test_fs_unsuppoted(struct super_block *sb)
-+{
-+ return
-+#ifndef CONFIG_AUFS_BR_RAMFS
-+ au_test_ramfs(sb) ||
-+#endif
-+ au_test_procfs(sb)
-+ || au_test_sysfs(sb)
-+ || au_test_configfs(sb)
-+ || au_test_debugfs(sb)
-+ || au_test_securityfs(sb)
-+ || au_test_xenfs(sb)
-+ || au_test_ecryptfs(sb)
-+ /* || !strcmp(au_sbtype(sb), "unionfs") */
-+ || au_test_aufs(sb); /* will be supported in next version */
-+}
+
-+static inline int au_test_fs_remote(struct super_block *sb)
++static void au_fsctx_dump(struct au_opts *opts)
+{
-+ return !au_test_tmpfs(sb)
-+#ifdef CONFIG_AUFS_BR_RAMFS
-+ && !au_test_ramfs(sb)
-+#endif
-+ && !(sb->s_type->fs_flags & FS_REQUIRES_DEV);
-+}
-+
-+/* ---------------------------------------------------------------------- */
++#ifdef CONFIG_AUFS_DEBUG
++ /* reduce stack space */
++ union {
++ struct au_opt_add *add;
++ struct au_opt_del *del;
++ struct au_opt_mod *mod;
++ struct au_opt_xino *xino;
++ struct au_opt_xino_itrunc *xino_itrunc;
++ struct au_opt_wbr_create *create;
++ } u;
++ struct au_opt *opt;
++
++ opt = opts->opt;
++ while (opt->type != Opt_tail) {
++ switch (opt->type) {
++ case Opt_add:
++ u.add = &opt->add;
++ AuDbg("add {b%d, %s, 0x%x, %p}\n",
++ u.add->bindex, u.add->pathname, u.add->perm,
++ u.add->path.dentry);
++ break;
++ case Opt_del:
++ fallthrough;
++ case Opt_idel:
++ u.del = &opt->del;
++ AuDbg("del {%s, %p}\n",
++ u.del->pathname, u.del->h_path.dentry);
++ break;
++ case Opt_mod:
++ fallthrough;
++ case Opt_imod:
++ u.mod = &opt->mod;
++ AuDbg("mod {%s, 0x%x, %p}\n",
++ u.mod->path, u.mod->perm, u.mod->h_root);
++ break;
++ case Opt_append:
++ u.add = &opt->add;
++ AuDbg("append {b%d, %s, 0x%x, %p}\n",
++ u.add->bindex, u.add->pathname, u.add->perm,
++ u.add->path.dentry);
++ break;
++ case Opt_prepend:
++ u.add = &opt->add;
++ AuDbg("prepend {b%d, %s, 0x%x, %p}\n",
++ u.add->bindex, u.add->pathname, u.add->perm,
++ u.add->path.dentry);
++ break;
++
++ case Opt_dirwh:
++ AuDbg("dirwh %d\n", opt->dirwh);
++ break;
++ case Opt_rdcache:
++ AuDbg("rdcache %d\n", opt->rdcache);
++ break;
++ case Opt_rdblk:
++ AuDbg("rdblk %d\n", opt->rdblk);
++ break;
++ case Opt_rdhash:
++ AuDbg("rdhash %u\n", opt->rdhash);
++ break;
++
++ case Opt_xino:
++ u.xino = &opt->xino;
++ AuDbg("xino {%s %pD}\n", u.xino->path, u.xino->file);
++ break;
++
++#define au_fsctx_TF(name) \
++ case Opt_##name: \
++ if (opt->tf) \
++ AuLabel(name); \
++ else \
++ AuLabel(no##name); \
++ break;
++
++ /* simple true/false flag */
++ au_fsctx_TF(trunc_xino);
++ au_fsctx_TF(trunc_xib);
++ au_fsctx_TF(dirperm1);
++ au_fsctx_TF(plink);
++ au_fsctx_TF(shwh);
++ au_fsctx_TF(dio);
++ au_fsctx_TF(warn_perm);
++ au_fsctx_TF(verbose);
++ au_fsctx_TF(sum);
++ au_fsctx_TF(dirren);
++ au_fsctx_TF(acl);
++#undef au_fsctx_TF
++
++ case Opt_trunc_xino_path:
++ fallthrough;
++ case Opt_itrunc_xino:
++ u.xino_itrunc = &opt->xino_itrunc;
++ AuDbg("trunc_xino %d\n", u.xino_itrunc->bindex);
++ break;
++ case Opt_noxino:
++ AuLabel(noxino);
++ break;
++
++ case Opt_list_plink:
++ AuLabel(list_plink);
++ break;
++ case Opt_udba:
++ AuDbg("udba %d, %s\n",
++ opt->udba, au_optstr_udba(opt->udba));
++ break;
++ case Opt_diropq_a:
++ AuLabel(diropq_a);
++ break;
++ case Opt_diropq_w:
++ AuLabel(diropq_w);
++ break;
++ case Opt_wsum:
++ AuLabel(wsum);
++ break;
++ case Opt_wbr_create:
++ u.create = &opt->wbr_create;
++ AuDbg("create %d, %s\n", u.create->wbr_create,
++ au_optstr_wbr_create(u.create->wbr_create));
++ switch (u.create->wbr_create) {
++ case AuWbrCreate_MFSV:
++ fallthrough;
++ case AuWbrCreate_PMFSV:
++ AuDbg("%d sec\n", u.create->mfs_second);
++ break;
++ case AuWbrCreate_MFSRR:
++ fallthrough;
++ case AuWbrCreate_TDMFS:
++ AuDbg("%llu watermark\n",
++ u.create->mfsrr_watermark);
++ break;
++ case AuWbrCreate_MFSRRV:
++ fallthrough;
++ case AuWbrCreate_TDMFSV:
++ fallthrough;
++ case AuWbrCreate_PMFSRRV:
++ AuDbg("%llu watermark, %d sec\n",
++ u.create->mfsrr_watermark,
++ u.create->mfs_second);
++ break;
++ }
++ break;
++ case Opt_wbr_copyup:
++ AuDbg("copyup %d, %s\n", opt->wbr_copyup,
++ au_optstr_wbr_copyup(opt->wbr_copyup));
++ break;
++ case Opt_fhsm_sec:
++ AuDbg("fhsm_sec %u\n", opt->fhsm_second);
++ break;
++
++ default:
++ AuDbg("type %d\n", opt->type);
++ BUG();
++ }
++ opt++;
++ }
++#endif
++}
++
++/* ---------------------------------------------------------------------- */
++
++/*
++ * For conditionally compiled mount options.
++ * Instead of fsparam_flag_no(), use this macro to distinguish ignore_silent.
++ */
++#define au_ignore_flag(name, action) \
++ fsparam_flag(name, action), \
++ fsparam_flag("no" name, Opt_ignore_silent)
++
++const struct fs_parameter_spec aufs_fsctx_paramspec[] = {
++ fsparam_string("br", Opt_br),
++
++ /* "add=%d:%s" or "ins=%d:%s" */
++ fsparam_string("add", Opt_add),
++ fsparam_string("ins", Opt_add),
++ fsparam_path("append", Opt_append),
++ fsparam_path("prepend", Opt_prepend),
++
++ fsparam_path("del", Opt_del),
++ /* fsparam_s32("idel", Opt_idel), */
++ fsparam_path("mod", Opt_mod),
++ /* fsparam_string("imod", Opt_imod), */
++
++ fsparam_s32("dirwh", Opt_dirwh),
++
++ fsparam_path("xino", Opt_xino),
++ fsparam_flag("noxino", Opt_noxino),
++ fsparam_flag_no("trunc_xino", Opt_trunc_xino),
++ /* "trunc_xino_v=%d:%d" */
++ /* fsparam_string("trunc_xino_v", Opt_trunc_xino_v), */
++ fsparam_path("trunc_xino", Opt_trunc_xino_path),
++ fsparam_s32("itrunc_xino", Opt_itrunc_xino),
++ /* fsparam_path("zxino", Opt_zxino), */
++ fsparam_flag_no("trunc_xib", Opt_trunc_xib),
++
++#ifdef CONFIG_PROC_FS
++ fsparam_flag_no("plink", Opt_plink),
++#else
++ au_ignore_flag("plink", Opt_ignore),
++#endif
++
++#ifdef CONFIG_AUFS_DEBUG
++ fsparam_flag("list_plink", Opt_list_plink),
++#endif
++
++ fsparam_string("udba", Opt_udba),
++
++ fsparam_flag_no("dio", Opt_dio),
++
++#ifdef CONFIG_AUFS_DIRREN
++ fsparam_flag_no("dirren", Opt_dirren),
++#else
++ au_ignore_flag("dirren", Opt_ignore),
++#endif
++
++#ifdef CONFIG_AUFS_FHSM
++ fsparam_s32("fhsm_sec", Opt_fhsm_sec),
++#else
++ fsparam_s32("fhsm_sec", Opt_ignore),
++#endif
++
++ /* always | a | whiteouted | w */
++ fsparam_string("diropq", Opt_diropq),
++
++ fsparam_flag_no("warn_perm", Opt_warn_perm),
++
++#ifdef CONFIG_AUFS_SHWH
++ fsparam_flag_no("shwh", Opt_shwh),
++#else
++ au_ignore_flag("shwh", Opt_err),
++#endif
++
++ fsparam_flag_no("dirperm1", Opt_dirperm1),
++
++ fsparam_flag_no("verbose", Opt_verbose),
++ fsparam_flag("v", Opt_verbose),
++ fsparam_flag("quiet", Opt_noverbose),
++ fsparam_flag("q", Opt_noverbose),
++ /* user-space may handle this */
++ fsparam_flag("silent", Opt_noverbose),
++
++ fsparam_flag_no("sum", Opt_sum),
++ fsparam_flag("wsum", Opt_wsum),
++
++ fsparam_s32("rdcache", Opt_rdcache),
++ /* "def" or s32 */
++ fsparam_string("rdblk", Opt_rdblk),
++ /* "def" or s32 */
++ fsparam_string("rdhash", Opt_rdhash),
++
++ fsparam_string("create", Opt_wbr_create),
++ fsparam_string("create_policy", Opt_wbr_create),
++ fsparam_string("cpup", Opt_wbr_copyup),
++ fsparam_string("copyup", Opt_wbr_copyup),
++ fsparam_string("copyup_policy", Opt_wbr_copyup),
++
++ /* generic VFS flag */
++#ifdef CONFIG_FS_POSIX_ACL
++ fsparam_flag_no("acl", Opt_acl),
++#else
++ au_ignore_flag("acl", Opt_ignore),
++#endif
++
++ /* internal use for the scripts */
++ fsparam_string("si", Opt_ignore_silent),
++
++ /* obsoleted, keep them temporary */
++ fsparam_flag("nodlgt", Opt_ignore_silent),
++ fsparam_flag("clean_plink", Opt_ignore),
++ fsparam_string("dirs", Opt_br),
++ fsparam_u32("debug", Opt_ignore),
++ /* "whiteout" or "all" */
++ fsparam_string("delete", Opt_ignore),
++ fsparam_string("imap", Opt_ignore),
++
++ /* temporary workaround, due to old mount(8)? */
++ fsparam_flag("relatime", Opt_ignore_silent),
++
++ {}
++};
++
++static int au_fsctx_parse_do_add(struct fs_context *fc, struct au_opt *opt,
++ char *brspec, size_t speclen,
++ aufs_bindex_t bindex)
++{
++ int err;
++ char *p;
++
++ AuDbg("brspec %s\n", brspec);
++
++ err = -ENOMEM;
++ if (!speclen)
++ speclen = strlen(brspec);
++ /* will be freed by au_fsctx_free() */
++ p = kmemdup_nul(brspec, speclen, GFP_NOFS);
++ if (unlikely(!p)) {
++ errorfc(fc, "failed in %s", brspec);
++ goto out;
++ }
++ err = au_opt_add(opt, p, fc->sb_flags, bindex);
++
++out:
++ AuTraceErr(err);
++ return err;
++}
++
++static int au_fsctx_parse_br(struct fs_context *fc, char *brspec)
++{
++ int err;
++ char *p;
++ struct au_fsctx_opts *a = fc->fs_private;
++ struct au_opt *opt = a->opt;
++ aufs_bindex_t bindex = a->bindex;
++
++ AuDbg("brspec %s\n", brspec);
++
++ err = -EINVAL;
++ while ((p = strsep(&brspec, ":")) && *p) {
++ err = au_fsctx_parse_do_add(fc, opt, p, /*len*/0, bindex);
++ AuTraceErr(err);
++ if (unlikely(err))
++ break;
++ bindex++;
++ opt++;
++ if (unlikely(opt > a->opt_tail)) {
++ err = -E2BIG;
++ bindex--;
++ opt--;
++ break;
++ }
++ opt->type = Opt_tail;
++ a->skipped = 1;
++ }
++ a->bindex = bindex;
++ a->opt = opt;
++
++ AuTraceErr(err);
++ return err;
++}
++
++static int au_fsctx_parse_add(struct fs_context *fc, char *addspec)
++{
++ int err, n;
++ char *p;
++ struct au_fsctx_opts *a = fc->fs_private;
++ struct au_opt *opt = a->opt;
++
++ err = -EINVAL;
++ p = strchr(addspec, ':');
++ if (unlikely(!p)) {
++ errorfc(fc, "bad arg in %s", addspec);
++ goto out;
++ }
++ *p++ = '\0';
++ err = kstrtoint(addspec, 0, &n);
++ if (unlikely(err)) {
++ errorfc(fc, "bad integer in %s", addspec);
++ goto out;
++ }
++ AuDbg("n %d\n", n);
++ err = au_fsctx_parse_do_add(fc, opt, p, /*len*/0, n);
++
++out:
++ AuTraceErr(err);
++ return err;
++}
++
++static int au_fsctx_parse_del(struct fs_context *fc, struct au_opt_del *del,
++ struct fs_parameter *param)
++{
++ int err;
++
++ err = -ENOMEM;
++ /* will be freed by au_fsctx_free() */
++ del->pathname = kmemdup_nul(param->string, param->size, GFP_NOFS);
++ if (unlikely(!del->pathname))
++ goto out;
++ AuDbg("del %s\n", del->pathname);
++ err = vfsub_kern_path(del->pathname, AuOpt_LkupDirFlags, &del->h_path);
++ if (unlikely(err))
++ errorfc(fc, "lookup failed %s (%d)", del->pathname, err);
++
++out:
++ AuTraceErr(err);
++ return err;
++}
++
++#if 0 /* reserved for future use */
++static int au_fsctx_parse_idel(struct fs_context *fc, struct au_opt_del *del,
++ aufs_bindex_t bindex)
++{
++ int err;
++ struct super_block *sb;
++ struct dentry *root;
++ struct au_fsctx_opts *a = fc->fs_private;
++
++ sb = a->sb;
++ AuDebugOn(!sb);
++
++ err = -EINVAL;
++ root = sb->s_root;
++ aufs_read_lock(root, AuLock_FLUSH);
++ if (bindex < 0 || au_sbbot(sb) < bindex) {
++ errorfc(fc, "out of bounds, %d", bindex);
++ goto out;
++ }
++
++ err = 0;
++ del->h_path.dentry = dget(au_h_dptr(root, bindex));
++ del->h_path.mnt = mntget(au_sbr_mnt(sb, bindex));
++
++out:
++ aufs_read_unlock(root, !AuLock_IR);
++ AuTraceErr(err);
++ return err;
++}
++#endif
++
++static int au_fsctx_parse_mod(struct fs_context *fc, struct au_opt_mod *mod,
++ struct fs_parameter *param)
++{
++ int err;
++ struct path path;
++ char *p;
++
++ err = -ENOMEM;
++ /* will be freed by au_fsctx_free() */
++ mod->path = kmemdup_nul(param->string, param->size, GFP_NOFS);
++ if (unlikely(!mod->path))
++ goto out;
++
++ err = -EINVAL;
++ p = strchr(mod->path, '=');
++ if (unlikely(!p)) {
++ errorfc(fc, "no permission %s", mod->path);
++ goto out;
++ }
++
++ *p++ = 0;
++ err = vfsub_kern_path(mod->path, AuOpt_LkupDirFlags, &path);
++ if (unlikely(err)) {
++ errorfc(fc, "lookup failed %s (%d)", mod->path, err);
++ goto out;
++ }
++
++ mod->perm = au_br_perm_val(p);
++ AuDbg("mod path %s, perm 0x%x, %s", mod->path, mod->perm, p);
++ mod->h_root = dget(path.dentry);
++ path_put(&path);
++
++out:
++ AuTraceErr(err);
++ return err;
++}
++
++#if 0 /* reserved for future use */
++static int au_fsctx_parse_imod(struct fs_context *fc, struct au_opt_mod *mod,
++ char *ibrspec)
++{
++ int err, n;
++ char *p;
++ struct super_block *sb;
++ struct dentry *root;
++ struct au_fsctx_opts *a = fc->fs_private;
++
++ sb = a->sb;
++ AuDebugOn(!sb);
++
++ err = -EINVAL;
++ p = strchr(ibrspec, ':');
++ if (unlikely(!p)) {
++ errorfc(fc, "no index, %s", ibrspec);
++ goto out;
++ }
++ *p++ = '\0';
++ err = kstrtoint(ibrspec, 0, &n);
++ if (unlikely(err)) {
++ errorfc(fc, "bad integer in %s", ibrspec);
++ goto out;
++ }
++ AuDbg("n %d\n", n);
++
++ root = sb->s_root;
++ aufs_read_lock(root, AuLock_FLUSH);
++ if (n < 0 || au_sbbot(sb) < n) {
++ errorfc(fc, "out of bounds, %d", bindex);
++ goto out_root;
++ }
++
++ err = 0;
++ mod->perm = au_br_perm_val(p);
++ AuDbg("mod path %s, perm 0x%x, %s\n",
++ mod->path, mod->perm, p);
++ mod->h_root = dget(au_h_dptr(root, bindex));
++
++out_root:
++ aufs_read_unlock(root, !AuLock_IR);
++out:
++ AuTraceErr(err);
++ return err;
++}
++#endif
++
++static int au_fsctx_parse_xino(struct fs_context *fc,
++ struct au_opt_xino *xino,
++ struct fs_parameter *param)
++{
++ int err;
++ struct au_fsctx_opts *a = fc->fs_private;
++
++ err = -ENOMEM;
++ /* will be freed by au_opts_free() */
++ xino->path = kmemdup_nul(param->string, param->size, GFP_NOFS);
++ if (unlikely(!xino->path))
++ goto out;
++ AuDbg("path %s\n", xino->path);
++
++ xino->file = au_xino_create(a->sb, xino->path, /*silent*/0,
++ /*wbrtop*/0);
++ err = PTR_ERR(xino->file);
++ if (IS_ERR(xino->file)) {
++ xino->file = NULL;
++ goto out;
++ }
++
++ err = 0;
++ if (unlikely(a->sb && xino->file->f_path.dentry->d_sb == a->sb)) {
++ err = -EINVAL;
++ errorfc(fc, "%s must be outside", xino->path);
++ }
++
++out:
++ AuTraceErr(err);
++ return err;
++}
++
++static
++int au_fsctx_parse_xino_itrunc_path(struct fs_context *fc,
++ struct au_opt_xino_itrunc *xino_itrunc,
++ char *pathname)
++{
++ int err;
++ aufs_bindex_t bbot, bindex;
++ struct path path;
++ struct dentry *root;
++ struct au_fsctx_opts *a = fc->fs_private;
++
++ AuDebugOn(!a->sb);
++
++ err = vfsub_kern_path(pathname, AuOpt_LkupDirFlags, &path);
++ if (unlikely(err)) {
++ errorfc(fc, "lookup failed %s (%d)", pathname, err);
++ goto out;
++ }
++
++ xino_itrunc->bindex = -1;
++ root = a->sb->s_root;
++ aufs_read_lock(root, AuLock_FLUSH);
++ bbot = au_sbbot(a->sb);
++ for (bindex = 0; bindex <= bbot; bindex++) {
++ if (au_h_dptr(root, bindex) == path.dentry) {
++ xino_itrunc->bindex = bindex;
++ break;
++ }
++ }
++ aufs_read_unlock(root, !AuLock_IR);
++ path_put(&path);
++
++ if (unlikely(xino_itrunc->bindex < 0)) {
++ err = -EINVAL;
++ errorfc(fc, "no such branch %s", pathname);
++ }
++
++out:
++ AuTraceErr(err);
++ return err;
++}
++
++static int au_fsctx_parse_xino_itrunc(struct fs_context *fc,
++ struct au_opt_xino_itrunc *xino_itrunc,
++ unsigned int bindex)
++{
++ int err;
++ aufs_bindex_t bbot;
++ struct super_block *sb;
++ struct au_fsctx_opts *a = fc->fs_private;
++
++ sb = a->sb;
++ AuDebugOn(!sb);
++
++ err = 0;
++ si_noflush_read_lock(sb);
++ bbot = au_sbbot(sb);
++ si_read_unlock(sb);
++ if (bindex <= bbot)
++ xino_itrunc->bindex = bindex;
++ else {
++ err = -EINVAL;
++ errorfc(fc, "out of bounds, %u", bindex);
++ }
++
++ AuTraceErr(err);
++ return err;
++}
++
++static int au_fsctx_parse_param(struct fs_context *fc, struct fs_parameter *param)
++{
++ int err, token;
++ struct fs_parse_result result;
++ struct au_fsctx_opts *a = fc->fs_private;
++ struct au_opt *opt = a->opt;
++
++ AuDbg("fc %p, param {key %s, string %s}\n",
++ fc, param->key, param->string);
++ err = fs_parse(fc, aufs_fsctx_paramspec, param, &result);
++ if (unlikely(err < 0))
++ goto out;
++ token = err;
++ AuDbg("token %d, res{negated %d, uint64 %llu}\n",
++ token, result.negated, result.uint_64);
++
++ err = -EINVAL;
++ a->skipped = 0;
++ switch (token) {
++ case Opt_br:
++ err = au_fsctx_parse_br(fc, param->string);
++ break;
++ case Opt_add:
++ err = au_fsctx_parse_add(fc, param->string);
++ break;
++ case Opt_append:
++ err = au_fsctx_parse_do_add(fc, opt, param->string, param->size,
++ /*dummy bindex*/1);
++ break;
++ case Opt_prepend:
++ err = au_fsctx_parse_do_add(fc, opt, param->string, param->size,
++ /*bindex*/0);
++ break;
++
++ case Opt_del:
++ err = au_fsctx_parse_del(fc, &opt->del, param);
++ break;
++#if 0 /* reserved for future use */
++ case Opt_idel:
++ if (!a->sb) {
++ err = 0;
++ a->skipped = 1;
++ break;
++ }
++ del->pathname = "(indexed)";
++ err = au_opts_parse_idel(fc, &opt->del, result.uint_32);
++ break;
++#endif
++
++ case Opt_mod:
++ err = au_fsctx_parse_mod(fc, &opt->mod, param);
++ break;
++#ifdef IMOD /* reserved for future use */
++ case Opt_imod:
++ if (!a->sb) {
++ err = 0;
++ a->skipped = 1;
++ break;
++ }
++ u.mod->path = "(indexed)";
++ err = au_opts_parse_imod(fc, &opt->mod, param->string);
++ break;
++#endif
++
++ case Opt_xino:
++ err = au_fsctx_parse_xino(fc, &opt->xino, param);
++ break;
++ case Opt_trunc_xino_path:
++ if (!a->sb) {
++ errorfc(fc, "no such branch %s", param->string);
++ break;
++ }
++ err = au_fsctx_parse_xino_itrunc_path(fc, &opt->xino_itrunc,
++ param->string);
++ break;
++#if 0
++ case Opt_trunc_xino_v:
++ if (!a->sb) {
++ err = 0;
++ a->skipped = 1;
++ break;
++ }
++ err = au_fsctx_parse_xino_itrunc_path(fc, &opt->xino_itrunc,
++ param->string);
++ break;
++#endif
++ case Opt_itrunc_xino:
++ if (!a->sb) {
++ errorfc(fc, "out of bounds %s", param->string);
++ break;
++ }
++ err = au_fsctx_parse_xino_itrunc(fc, &opt->xino_itrunc,
++ result.int_32);
++ break;
++
++ case Opt_dirwh:
++ err = 0;
++ opt->dirwh = result.int_32;
++ break;
++
++ case Opt_rdcache:
++ if (unlikely(result.int_32 > AUFS_RDCACHE_MAX)) {
++ errorfc(fc, "rdcache must be smaller than %d",
++ AUFS_RDCACHE_MAX);
++ break;
++ }
++ err = 0;
++ opt->rdcache = result.int_32;
++ break;
++
++ case Opt_rdblk:
++ err = 0;
++ opt->rdblk = AUFS_RDBLK_DEF;
++ if (!strcmp(param->string, "def"))
++ break;
++
++ err = kstrtoint(param->string, 0, &result.int_32);
++ if (unlikely(err)) {
++ errorfc(fc, "bad value in %s", param->key);
++ break;
++ }
++ err = -EINVAL;
++ if (unlikely(result.int_32 < 0
++ || result.int_32 > KMALLOC_MAX_SIZE)) {
++ errorfc(fc, "bad value in %s", param->key);
++ break;
++ }
++ if (unlikely(result.int_32 && result.int_32 < NAME_MAX)) {
++ errorfc(fc, "rdblk must be larger than %d", NAME_MAX);
++ break;
++ }
++ err = 0;
++ opt->rdblk = result.int_32;
++ break;
++
++ case Opt_rdhash:
++ err = 0;
++ opt->rdhash = AUFS_RDHASH_DEF;
++ if (!strcmp(param->string, "def"))
++ break;
++
++ err = kstrtoint(param->string, 0, &result.int_32);
++ if (unlikely(err)) {
++ errorfc(fc, "bad value in %s", param->key);
++ break;
++ }
++ /* how about zero? */
++ if (result.int_32 < 0
++ || result.int_32 * sizeof(struct hlist_head)
++ > KMALLOC_MAX_SIZE) {
++ err = -EINVAL;
++ errorfc(fc, "bad integer in %s", param->key);
++ break;
++ }
++ opt->rdhash = result.int_32;
++ break;
++
++ case Opt_diropq:
++ /*
++ * As other options, fs/aufs/opts.c can handle these strings by
++ * match_token(). But "diropq=" is deprecated now and will
++ * never have other value. So simple strcmp() is enough here.
++ */
++ if (!strcmp(param->string, "a") ||
++ !strcmp(param->string, "always")) {
++ err = 0;
++ opt->type = Opt_diropq_a;
++ } else if (!strcmp(param->string, "w") ||
++ !strcmp(param->string, "whiteouted")) {
++ err = 0;
++ opt->type = Opt_diropq_w;
++ } else
++ errorfc(fc, "unknown value %s", param->string);
++ break;
++
++ case Opt_udba:
++ opt->udba = au_udba_val(param->string);
++ if (opt->udba >= 0)
++ err = 0;
++ else
++ errorf(fc, "wrong value, %s", param->string);
++ break;
++
++ case Opt_wbr_create:
++ opt->wbr_create.wbr_create
++ = au_wbr_create_val(param->string, &opt->wbr_create);
++ if (opt->wbr_create.wbr_create >= 0)
++ err = 0;
++ else
++ errorf(fc, "wrong value, %s", param->key);
++ break;
++
++ case Opt_wbr_copyup:
++ opt->wbr_copyup = au_wbr_copyup_val(param->string);
++ if (opt->wbr_copyup >= 0)
++ err = 0;
++ else
++ errorfc(fc, "wrong value, %s", param->key);
++ break;
++
++ case Opt_fhsm_sec:
++ if (unlikely(result.int_32 < 0)) {
++ errorfc(fc, "bad integer in %s\n", param->key);
++ break;
++ }
++ err = 0;
++ if (sysaufs_brs)
++ opt->fhsm_second = result.int_32;
++ else
++ warnfc(fc, "ignored %s %s", param->key, param->string);
++ break;
++
++ /* simple true/false flag */
++#define au_fsctx_TF(name) \
++ case Opt_##name: \
++ err = 0; \
++ opt->tf = !result.negated; \
++ break
++ au_fsctx_TF(trunc_xino);
++ au_fsctx_TF(trunc_xib);
++ au_fsctx_TF(dirperm1);
++ au_fsctx_TF(plink);
++ au_fsctx_TF(shwh);
++ au_fsctx_TF(dio);
++ au_fsctx_TF(warn_perm);
++ au_fsctx_TF(verbose);
++ au_fsctx_TF(sum);
++ au_fsctx_TF(dirren);
++ au_fsctx_TF(acl);
++#undef au_fsctx_TF
++
++ case Opt_noverbose:
++ err = 0;
++ opt->type = Opt_verbose;
++ opt->tf = false;
++ break;
++
++ case Opt_noxino:
++ fallthrough;
++ case Opt_list_plink:
++ fallthrough;
++ case Opt_wsum:
++ err = 0;
++ break;
++
++ case Opt_ignore:
++ warnfc(fc, "ignored %s", param->key);
++ fallthrough;
++ case Opt_ignore_silent:
++ a->skipped = 1;
++ err = 0;
++ break;
++ default:
++ a->skipped = 1;
++ err = -ENOPARAM;
++ break;
++ }
++ if (unlikely(err))
++ goto out;
++ if (a->skipped)
++ goto out;
++
++ switch (token) {
++ case Opt_br:
++ fallthrough;
++ case Opt_noverbose:
++ fallthrough;
++ case Opt_diropq:
++ break;
++ default:
++ opt->type = token;
++ break;
++ }
++ opt++;
++ if (unlikely(opt > a->opt_tail)) {
++ err = -E2BIG;
++ opt--;
++ }
++ opt->type = Opt_tail;
++ a->opt = opt;
++
++out:
++ return err;
++}
++
++/*
++ * these options accept both 'name=val' and 'name:val' form.
++ * some accept optional '=' in its value.
++ * eg. br:/br1=rw:/br2=ro and br=/br1=rw:/br2=ro
++ */
++static inline unsigned int is_colonopt(char *str)
++{
++#define do_test(name) \
++ if (!strncmp(str, name ":", sizeof(name))) \
++ return sizeof(name) - 1
++ do_test("br");
++ do_test("add");
++ do_test("ins");
++ do_test("append");
++ do_test("prepend");
++ do_test("del");
++ /* do_test("idel"); */
++ do_test("mod");
++ /* do_test("imod"); */
++#undef do_test
++
++ return 0;
++}
++
++static int au_fsctx_parse_monolithic(struct fs_context *fc, void *data)
++{
++ int err;
++ unsigned int u;
++ char *str;
++ struct au_fsctx_opts *a = fc->fs_private;
++
++ str = data;
++ AuDbg("str %s\n", str);
++ while (str) {
++ u = is_colonopt(str);
++ if (u)
++ str[u] = '=';
++ str = strchr(str, ',');
++ if (!str)
++ break;
++ str++;
++ }
++ str = data;
++ AuDbg("str %s\n", str);
++
++ err = generic_parse_monolithic(fc, str);
++ AuTraceErr(err);
++ au_fsctx_dump(&a->opts);
++
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++static void au_fsctx_opts_free(struct au_opts *opts)
++{
++ struct au_opt *opt;
++
++ opt = opts->opt;
++ while (opt->type != Opt_tail) {
++ switch (opt->type) {
++ case Opt_add:
++ fallthrough;
++ case Opt_append:
++ fallthrough;
++ case Opt_prepend:
++ kfree(opt->add.pathname);
++ path_put(&opt->add.path);
++ break;
++ case Opt_del:
++ kfree(opt->del.pathname);
++ fallthrough;
++ case Opt_idel:
++ path_put(&opt->del.h_path);
++ break;
++ case Opt_mod:
++ kfree(opt->mod.path);
++ fallthrough;
++ case Opt_imod:
++ dput(opt->mod.h_root);
++ break;
++ case Opt_xino:
++ kfree(opt->xino.path);
++ fput(opt->xino.file);
++ break;
++ }
++ opt++;
++ }
++}
++
++static void au_fsctx_free(struct fs_context *fc)
++{
++ struct au_fsctx_opts *a = fc->fs_private;
++
++ /* fs_type=%p, root=%pD */
++ AuDbg("fc %p{sb_flags 0x%x, sb_flags_mask 0x%x, purpose %u\n",
++ fc, fc->sb_flags, fc->sb_flags_mask, fc->purpose);
++
++ kobject_put(&a->sbinfo->si_kobj);
++ au_fsctx_opts_free(&a->opts);
++ free_page((unsigned long)a->opts.opt);
++ au_kfree_rcu(a);
++}
++
++static const struct fs_context_operations au_fsctx_ops = {
++ .free = au_fsctx_free,
++ .parse_param = au_fsctx_parse_param,
++ .parse_monolithic = au_fsctx_parse_monolithic,
++ .get_tree = au_fsctx_get_tree,
++ .reconfigure = au_fsctx_reconfigure
++ /*
++ * nfs4 requires ->dup()? No.
++ * I don't know what is this ->dup() for.
++ */
++};
++
++int aufs_fsctx_init(struct fs_context *fc)
++{
++ int err;
++ struct au_fsctx_opts *a;
++
++ /* fs_type=%p, root=%pD */
++ AuDbg("fc %p{sb_flags 0x%x, sb_flags_mask 0x%x, purpose %u\n",
++ fc, fc->sb_flags, fc->sb_flags_mask, fc->purpose);
++
++ /* they will be freed by au_fsctx_free() */
++ err = -ENOMEM;
++ a = kzalloc(sizeof(*a), GFP_NOFS);
++ if (unlikely(!a))
++ goto out;
++ a->bindex = 0;
++ a->opts.opt = (void *)__get_free_page(GFP_NOFS);
++ if (unlikely(!a->opts.opt))
++ goto out_a;
++ a->opt = a->opts.opt;
++ a->opt->type = Opt_tail;
++ a->opts.max_opt = PAGE_SIZE / sizeof(*a->opts.opt);
++ a->opt_tail = a->opt + a->opts.max_opt - 1;
++ a->opts.sb_flags = fc->sb_flags;
++
++ a->sb = NULL;
++ if (fc->root) {
++ AuDebugOn(fc->purpose != FS_CONTEXT_FOR_RECONFIGURE);
++ a->opts.flags = AuOpts_REMOUNT;
++ a->sb = fc->root->d_sb;
++ a->sbinfo = au_sbi(a->sb);
++ kobject_get(&a->sbinfo->si_kobj);
++ } else {
++ a->sbinfo = au_si_alloc(a->sb);
++ AuDebugOn(!a->sbinfo);
++ err = PTR_ERR(a->sbinfo);
++ if (IS_ERR(a->sbinfo))
++ goto out_opt;
++ au_rw_write_unlock(&a->sbinfo->si_rwsem);
++ }
++
++ err = 0;
++ fc->fs_private = a;
++ fc->ops = &au_fsctx_ops;
++ goto out; /* success */
++
++out_opt:
++ free_page((unsigned long)a->opts.opt);
++out_a:
++ au_kfree_rcu(a);
++out:
++ AuTraceErr(err);
++ return err;
++}
+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 2022-08-02 12:12:45.165641939 +0200
+@@ -0,0 +1,401 @@
++/* SPDX-License-Identifier: GPL-2.0 */
++/*
++ * Copyright (C) 2005-2021 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
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program. If not, see <http://www.gnu.org/licenses/>.
++ */
++
++/*
++ * judging filesystem type
++ */
++
++#ifndef __AUFS_FSTYPE_H__
++#define __AUFS_FSTYPE_H__
++
++#ifdef __KERNEL__
++
++#include <linux/fs.h>
++#include <linux/magic.h>
++#include <linux/nfs_fs.h>
++#include <linux/romfs_fs.h>
++
++static inline int au_test_aufs(struct super_block *sb)
++{
++ return sb->s_magic == AUFS_SUPER_MAGIC;
++}
++
++static inline const char *au_sbtype(struct super_block *sb)
++{
++ return sb->s_type->name;
++}
++
++static inline int au_test_iso9660(struct super_block *sb __maybe_unused)
++{
++#if IS_ENABLED(CONFIG_ISO9660_FS)
++ return sb->s_magic == ISOFS_SUPER_MAGIC;
++#else
++ return 0;
++#endif
++}
++
++static inline int au_test_romfs(struct super_block *sb __maybe_unused)
++{
++#if IS_ENABLED(CONFIG_ROMFS_FS)
++ return sb->s_magic == ROMFS_MAGIC;
++#else
++ return 0;
++#endif
++}
++
++static inline int au_test_cramfs(struct super_block *sb __maybe_unused)
++{
++#if IS_ENABLED(CONFIG_CRAMFS)
++ return sb->s_magic == CRAMFS_MAGIC;
++#endif
++ return 0;
++}
++
++static inline int au_test_nfs(struct super_block *sb __maybe_unused)
++{
++#if IS_ENABLED(CONFIG_NFS_FS)
++ return sb->s_magic == NFS_SUPER_MAGIC;
++#else
++ return 0;
++#endif
++}
++
++static inline int au_test_fuse(struct super_block *sb __maybe_unused)
++{
++#if IS_ENABLED(CONFIG_FUSE_FS)
++ return sb->s_magic == FUSE_SUPER_MAGIC;
++#else
++ return 0;
++#endif
++}
++
++static inline int au_test_xfs(struct super_block *sb __maybe_unused)
++{
++#if IS_ENABLED(CONFIG_XFS_FS)
++ return sb->s_magic == XFS_SB_MAGIC;
++#else
++ return 0;
++#endif
++}
++
++static inline int au_test_tmpfs(struct super_block *sb __maybe_unused)
++{
++#ifdef CONFIG_TMPFS
++ return sb->s_magic == TMPFS_MAGIC;
++#else
++ return 0;
++#endif
++}
++
++static inline int au_test_ecryptfs(struct super_block *sb __maybe_unused)
++{
++#if IS_ENABLED(CONFIG_ECRYPT_FS)
++ return !strcmp(au_sbtype(sb), "ecryptfs");
++#else
++ return 0;
++#endif
++}
++
++static inline int au_test_ramfs(struct super_block *sb)
++{
++ return sb->s_magic == RAMFS_MAGIC;
++}
++
++static inline int au_test_ubifs(struct super_block *sb __maybe_unused)
++{
++#if IS_ENABLED(CONFIG_UBIFS_FS)
++ return sb->s_magic == UBIFS_SUPER_MAGIC;
++#else
++ return 0;
++#endif
++}
++
++static inline int au_test_procfs(struct super_block *sb __maybe_unused)
++{
++#ifdef CONFIG_PROC_FS
++ return sb->s_magic == PROC_SUPER_MAGIC;
++#else
++ return 0;
++#endif
++}
++
++static inline int au_test_sysfs(struct super_block *sb __maybe_unused)
++{
++#ifdef CONFIG_SYSFS
++ return sb->s_magic == SYSFS_MAGIC;
++#else
++ return 0;
++#endif
++}
++
++static inline int au_test_configfs(struct super_block *sb __maybe_unused)
++{
++#if IS_ENABLED(CONFIG_CONFIGFS_FS)
++ return sb->s_magic == CONFIGFS_MAGIC;
++#else
++ return 0;
++#endif
++}
++
++static inline int au_test_minix(struct super_block *sb __maybe_unused)
++{
++#if IS_ENABLED(CONFIG_MINIX_FS)
++ return sb->s_magic == MINIX3_SUPER_MAGIC
++ || sb->s_magic == MINIX2_SUPER_MAGIC
++ || sb->s_magic == MINIX2_SUPER_MAGIC2
++ || sb->s_magic == MINIX_SUPER_MAGIC
++ || sb->s_magic == MINIX_SUPER_MAGIC2;
++#else
++ return 0;
++#endif
++}
++
++static inline int au_test_fat(struct super_block *sb __maybe_unused)
++{
++#if IS_ENABLED(CONFIG_FAT_FS)
++ return sb->s_magic == MSDOS_SUPER_MAGIC;
++#else
++ return 0;
++#endif
++}
++
++static inline int au_test_msdos(struct super_block *sb)
++{
++ return au_test_fat(sb);
++}
++
++static inline int au_test_vfat(struct super_block *sb)
++{
++ return au_test_fat(sb);
++}
++
++static inline int au_test_securityfs(struct super_block *sb __maybe_unused)
++{
++#ifdef CONFIG_SECURITYFS
++ return sb->s_magic == SECURITYFS_MAGIC;
++#else
++ return 0;
++#endif
++}
++
++static inline int au_test_squashfs(struct super_block *sb __maybe_unused)
++{
++#if IS_ENABLED(CONFIG_SQUASHFS)
++ return sb->s_magic == SQUASHFS_MAGIC;
++#else
++ return 0;
++#endif
++}
++
++static inline int au_test_btrfs(struct super_block *sb __maybe_unused)
++{
++#if IS_ENABLED(CONFIG_BTRFS_FS)
++ return sb->s_magic == BTRFS_SUPER_MAGIC;
++#else
++ return 0;
++#endif
++}
++
++static inline int au_test_xenfs(struct super_block *sb __maybe_unused)
++{
++#if IS_ENABLED(CONFIG_XENFS)
++ return sb->s_magic == XENFS_SUPER_MAGIC;
++#else
++ return 0;
++#endif
++}
++
++static inline int au_test_debugfs(struct super_block *sb __maybe_unused)
++{
++#ifdef CONFIG_DEBUG_FS
++ return sb->s_magic == DEBUGFS_MAGIC;
++#else
++ return 0;
++#endif
++}
++
++static inline int au_test_nilfs(struct super_block *sb __maybe_unused)
++{
++#if IS_ENABLED(CONFIG_NILFS)
++ return sb->s_magic == NILFS_SUPER_MAGIC;
++#else
++ return 0;
++#endif
++}
++
++static inline int au_test_hfsplus(struct super_block *sb __maybe_unused)
++{
++#if IS_ENABLED(CONFIG_HFSPLUS_FS)
++ return sb->s_magic == HFSPLUS_SUPER_MAGIC;
++#else
++ return 0;
++#endif
++}
++
++/* ---------------------------------------------------------------------- */
++/*
++ * they can't be an aufs branch.
++ */
++static inline int au_test_fs_unsuppoted(struct super_block *sb)
++{
++ return
++#ifndef CONFIG_AUFS_BR_RAMFS
++ au_test_ramfs(sb) ||
++#endif
++ au_test_procfs(sb)
++ || au_test_sysfs(sb)
++ || au_test_configfs(sb)
++ || au_test_debugfs(sb)
++ || au_test_securityfs(sb)
++ || au_test_xenfs(sb)
++ || au_test_ecryptfs(sb)
++ /* || !strcmp(au_sbtype(sb), "unionfs") */
++ || au_test_aufs(sb); /* will be supported in next version */
++}
++
++static inline int au_test_fs_remote(struct super_block *sb)
++{
++ return !au_test_tmpfs(sb)
++#ifdef CONFIG_AUFS_BR_RAMFS
++ && !au_test_ramfs(sb)
++#endif
++ && !(sb->s_type->fs_flags & FS_REQUIRES_DEV);
++}
++
++/* ---------------------------------------------------------------------- */
+
+/*
+ * Note: these functions (below) are created after reading ->getattr() in all
+#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 2020-01-27 10:57:18.172204883 +0100
++++ linux/fs/aufs/hbl.h 2022-08-02 12:12:45.165641939 +0200
@@ -0,0 +1,65 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2017-2020 Junjiro R. Okajima
++ * Copyright (C) 2017-2021 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 2020-01-27 10:57:18.172204883 +0100
-@@ -0,0 +1,288 @@
++++ linux/fs/aufs/hfsnotify.c 2022-08-02 12:12:45.165641939 +0200
+@@ -0,0 +1,290 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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)
+{
+ struct inode *h_dir, *h_inode;
+ struct fsnotify_mark *inode_mark;
+
-+ AuDebugOn(data_type != FSNOTIFY_EVENT_INODE);
++ AuDebugOn(!(data_type == FSNOTIFY_EVENT_INODE
++ || data_type == FSNOTIFY_EVENT_DENTRY));
+
+ err = 0;
+ /* if FS_UNMOUNT happens, there must be another bug */
+ if (mask & (FS_IN_IGNORED | FS_UNMOUNT))
+ goto out;
+
-+ h_dir = inode;
++ h_dir = dir;
+ h_inode = NULL;
+#ifdef AuDbgHnotify
+ au_debug_on();
+ goto out;
+
+ err = 0;
-+ group = fsnotify_alloc_group(&au_hfsn_ops);
++ group = fsnotify_alloc_group(&au_hfsn_ops,
++ /*flags - not for userspace*/0);
+ if (IS_ERR(group)) {
+ err = PTR_ERR(group);
+ pr_err("fsnotify_alloc_group() failed, %d\n", err);
+};
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 2020-01-27 10:57:18.172204883 +0100
++++ linux/fs/aufs/hfsplus.c 2022-08-02 12:12:45.165641939 +0200
@@ -0,0 +1,60 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2010-2020 Junjiro R. Okajima
++ * Copyright (C) 2010-2021 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 2020-01-27 10:57:18.172204883 +0100
++++ linux/fs/aufs/hnotify.c 2022-08-02 12:12:45.165641939 +0200
@@ -0,0 +1,715 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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
+ 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 2020-01-27 10:57:18.175538316 +0100
++++ linux/fs/aufs/iinfo.c 2022-08-02 12:12:45.165641939 +0200
@@ -0,0 +1,286 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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 2020-01-27 10:57:18.175538316 +0100
-@@ -0,0 +1,529 @@
++++ linux/fs/aufs/inode.c 2022-08-02 12:12:45.165641939 +0200
+@@ -0,0 +1,531 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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 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 2020-08-03 09:14:46.095748745 +0200
-@@ -0,0 +1,698 @@
++++ linux/fs/aufs/inode.h 2022-08-02 12:12:45.165641939 +0200
+@@ -0,0 +1,705 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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)
+/* 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);
++struct posix_acl *aufs_get_acl(struct inode *inode, int type, bool rcu);
++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 2020-01-27 10:57:18.175538316 +0100
++++ linux/fs/aufs/ioctl.c 2022-08-02 12:12:45.165641939 +0200
@@ -0,0 +1,220 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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 2020-01-27 10:57:18.172204883 +0100
-@@ -0,0 +1,936 @@
++++ linux/fs/aufs/i_op_add.c 2022-08-02 12:12:45.165641939 +0200
+@@ -0,0 +1,941 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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 2020-08-03 09:14:46.095748745 +0200
-@@ -0,0 +1,1502 @@
++++ linux/fs/aufs/i_op.c 2022-08-02 12:12:45.165641939 +0200
+@@ -0,0 +1,1512 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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
+#include <linux/device_cgroup.h>
+#include <linux/fs_stack.h>
+#include <linux/iversion.h>
-+#include <linux/namei.h>
+#include <linux/security.h>
+#include "aufs.h"
+
+{
+ 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);
+ }
+
+ 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;
+ 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)
+ 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;
+ 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 2020-01-27 10:57:18.172204883 +0100
-@@ -0,0 +1,513 @@
++++ linux/fs/aufs/i_op_del.c 2022-08-02 12:12:45.165641939 +0200
+@@ -0,0 +1,522 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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 path h_ppath;
++ struct super_block *sb;
++ struct au_branch *br;
++ 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;
-+ if (unlikely(!au_opt_test(au_mntflags(dentry->d_sb), DIRPERM1)
-+ && au_test_h_perm(d_inode(h_parent),
++ sb = dentry->d_sb;
++ br = au_sbr(sb, bindex);
++ h_userns = au_br_userns(br);
++ if (unlikely(!au_opt_test(au_mntflags(sb), DIRPERM1)
++ && 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_ppath.dentry = h_parent;
++ h_ppath.mnt = au_br_mnt(br);
++ h_latest = au_sio_lkup_one(h_userns, &dentry->d_name, &h_ppath);
+ 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 2020-01-27 10:57:18.172204883 +0100
-@@ -0,0 +1,1250 @@
++++ linux/fs/aufs/i_op_ren.c 2022-08-02 12:12:45.165641939 +0200
+@@ -0,0 +1,1257 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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 rerr;
+ struct inode *delegated;
++ struct path h_ppath = {
++ .dentry = a->src_h_parent,
++ .mnt = a->h_path.mnt
++ };
+
-+ a->h_path.dentry = vfsub_lkup_one(&a->src_dentry->d_name,
-+ a->src_h_parent);
++ a->h_path.dentry = vfsub_lkup_one(&a->src_dentry->d_name, &h_ppath);
+ rerr = PTR_ERR(a->h_path.dentry);
+ if (IS_ERR(a->h_path.dentry)) {
+ RevertFailure("lkup one %pd", a->src_dentry);
+{
+ int rerr;
+ struct inode *delegated;
++ struct path h_ppath = {
++ .dentry = a->dst_h_parent,
++ .mnt = a->h_path.mnt
++ };
+
-+ a->h_path.dentry = vfsub_lkup_one(&a->dst_dentry->d_name,
-+ a->dst_h_parent);
++ a->h_path.dentry = vfsub_lkup_one(&a->dst_dentry->d_name, &h_ppath);
+ rerr = PTR_ERR(a->h_path.dentry);
+ if (IS_ERR(a->h_path.dentry)) {
+ RevertFailure("lkup one %pd", a->dst_dentry);
+
+/* ---------------------------------------------------------------------- */
+
-+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 2022-08-02 12:12:45.162308621 +0200
@@ -0,0 +1,199 @@
+# SPDX-License-Identifier: GPL-2.0
+config AUFS_FS
+ his child on the lower branch, since it is a bad idea to issue
+ rename(2) internally for every lower branch. But user may not
+ accept this behaviour. So here is a workaround to allow such
-+ rename(2) and store some extra infromation on the writable
++ rename(2) and store some extra information on the writable
+ branch. Obviously this costs high (and I don't like it).
+ To use this feature, you need to enable this configuration AND
+ to specify the mount option `dirren.'
+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 2020-01-27 10:57:18.175538316 +0100
++++ linux/fs/aufs/lcnt.h 2022-08-02 12:12:45.165641939 +0200
@@ -0,0 +1,186 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2018-2020 Junjiro R. Okajima
++ * Copyright (C) 2018-2021 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 2020-01-27 10:57:18.175538316 +0100
++++ linux/fs/aufs/loop.c 2022-08-02 12:12:45.165641939 +0200
@@ -0,0 +1,148 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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 2020-01-27 10:57:18.175538316 +0100
++++ linux/fs/aufs/loop.h 2022-08-02 12:12:45.165641939 +0200
@@ -0,0 +1,55 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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 2022-08-02 12:12:45.165641939 +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 2022-08-02 12:12:45.162308621 +0200
@@ -0,0 +1,46 @@
+# SPDX-License-Identifier: GPL-2.0
+
+endif
+
+obj-$(CONFIG_AUFS_FS) += aufs.o
-+aufs-y := module.o sbinfo.o super.o branch.o xino.o sysaufs.o opts.o \
++aufs-y := module.o sbinfo.o super.o branch.o xino.o sysaufs.o opts.o fsctx.o \
+ wkq.o vfsub.o dcsub.o \
+ cpup.o whout.o wbr_policy.o \
+ dinfo.o dentry.o \
+aufs-$(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 2020-01-27 10:57:18.175538316 +0100
++++ linux/fs/aufs/module.c 2022-08-02 12:12:45.165641939 +0200
@@ -0,0 +1,273 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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 2020-01-27 10:57:18.175538316 +0100
-@@ -0,0 +1,166 @@
++++ linux/fs/aufs/module.h 2022-08-02 12:12:45.165641939 +0200
+@@ -0,0 +1,180 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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 inline int au_kmidx_sub(size_t sz, size_t new_sz)
+{
+#ifndef CONFIG_SLOB
-+ return kmalloc_index(sz) - kmalloc_index(new_sz);
++ return __kmalloc_index(sz, false) - __kmalloc_index(new_sz, false);
+#else
+ return -1; /* SLOB is untested */
+#endif
+ kmem_cache_create(#type, sizeof(struct type), \
+ __alignof__(struct type), AuCacheFlags, ctor)
+
-+#define AuCacheFuncs(name, index) \
++#define AuCacheFuncAlloc(name, index) \
+ static inline struct au_##name *au_cache_alloc_##name(void) \
-+ { return kmem_cache_alloc(au_cache[AuCache_##index], GFP_NOFS); } \
++ { return kmem_cache_alloc(au_cache[AuCache_##index], GFP_NOFS); }
++
++#define AuCacheFuncs(name, index) \
+ static inline void au_cache_free_##name##_norcu(struct au_##name *p) \
+ { kmem_cache_free(au_cache[AuCache_##index], p); } \
+ \
+ au_cache_free_##name##_rcu(p); }
+
+AuCacheFuncs(dinfo, DINFO);
++AuCacheFuncAlloc(dinfo, DINFO);
++
+AuCacheFuncs(icntnr, ICNTNR);
++static inline struct au_icntnr *au_cache_alloc_icntnr(struct super_block *sb)
++{ return alloc_inode_sb(sb, au_cache[AuCache_ICNTNR], GFP_NOFS); }
++
+AuCacheFuncs(finfo, FINFO);
++AuCacheFuncAlloc(finfo, FINFO);
++
+AuCacheFuncs(vdir, VDIR);
++AuCacheFuncAlloc(vdir, VDIR);
++
+AuCacheFuncs(vdir_dehstr, DEHSTR);
++AuCacheFuncAlloc(vdir_dehstr, DEHSTR);
++
+#ifdef CONFIG_AUFS_HNOTIFY
+AuCacheFuncs(hnotify, HNOTIFY);
++AuCacheFuncAlloc(hnotify, HNOTIFY);
+#endif
+
+#endif /* __KERNEL__ */
+#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 2020-01-27 10:57:18.175538316 +0100
++++ linux/fs/aufs/mvdown.c 2022-08-02 12:12:45.165641939 +0200
@@ -0,0 +1,706 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2011-2020 Junjiro R. Okajima
++ * Copyright (C) 2011-2021 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 2020-01-27 10:57:18.175538316 +0100
-@@ -0,0 +1,1880 @@
++++ linux/fs/aufs/opts.c 2022-08-02 12:12:45.165641939 +0200
+@@ -0,0 +1,1032 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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
+ * mount options/flags
+ */
+
-+#include <linux/namei.h>
+#include <linux/types.h> /* a distribution requires */
+#include <linux/parser.h>
+#include "aufs.h"
+
+/* ---------------------------------------------------------------------- */
+
-+enum {
-+ Opt_br,
-+ Opt_add, Opt_del, Opt_mod, Opt_append, Opt_prepend,
-+ Opt_idel, Opt_imod,
-+ Opt_dirwh, Opt_rdcache, Opt_rdblk, Opt_rdhash,
-+ Opt_rdblk_def, Opt_rdhash_def,
-+ Opt_xino, Opt_noxino,
-+ Opt_trunc_xino, Opt_trunc_xino_v, Opt_notrunc_xino,
-+ Opt_trunc_xino_path, Opt_itrunc_xino,
-+ Opt_trunc_xib, Opt_notrunc_xib,
-+ Opt_shwh, Opt_noshwh,
-+ Opt_plink, Opt_noplink, Opt_list_plink,
-+ Opt_udba,
-+ Opt_dio, Opt_nodio,
-+ Opt_diropq_a, Opt_diropq_w,
-+ Opt_warn_perm, Opt_nowarn_perm,
-+ Opt_wbr_copyup, Opt_wbr_create,
-+ Opt_fhsm_sec,
-+ Opt_verbose, Opt_noverbose,
-+ Opt_sum, Opt_nosum, Opt_wsum,
-+ Opt_dirperm1, Opt_nodirperm1,
-+ Opt_dirren, Opt_nodirren,
-+ Opt_acl, Opt_noacl,
-+ Opt_tail, Opt_ignore, Opt_ignore_silent, Opt_err
-+};
-+
-+static match_table_t options = {
-+ {Opt_br, "br=%s"},
-+ {Opt_br, "br:%s"},
-+
-+ {Opt_add, "add=%d:%s"},
-+ {Opt_add, "add:%d:%s"},
-+ {Opt_add, "ins=%d:%s"},
-+ {Opt_add, "ins:%d:%s"},
-+ {Opt_append, "append=%s"},
-+ {Opt_append, "append:%s"},
-+ {Opt_prepend, "prepend=%s"},
-+ {Opt_prepend, "prepend:%s"},
-+
-+ {Opt_del, "del=%s"},
-+ {Opt_del, "del:%s"},
-+ /* {Opt_idel, "idel:%d"}, */
-+ {Opt_mod, "mod=%s"},
-+ {Opt_mod, "mod:%s"},
-+ /* {Opt_imod, "imod:%d:%s"}, */
-+
-+ {Opt_dirwh, "dirwh=%d"},
-+
-+ {Opt_xino, "xino=%s"},
-+ {Opt_noxino, "noxino"},
-+ {Opt_trunc_xino, "trunc_xino"},
-+ {Opt_trunc_xino_v, "trunc_xino_v=%d:%d"},
-+ {Opt_notrunc_xino, "notrunc_xino"},
-+ {Opt_trunc_xino_path, "trunc_xino=%s"},
-+ {Opt_itrunc_xino, "itrunc_xino=%d"},
-+ /* {Opt_zxino, "zxino=%s"}, */
-+ {Opt_trunc_xib, "trunc_xib"},
-+ {Opt_notrunc_xib, "notrunc_xib"},
-+
-+#ifdef CONFIG_PROC_FS
-+ {Opt_plink, "plink"},
-+#else
-+ {Opt_ignore_silent, "plink"},
-+#endif
-+
-+ {Opt_noplink, "noplink"},
-+
-+#ifdef CONFIG_AUFS_DEBUG
-+ {Opt_list_plink, "list_plink"},
-+#endif
-+
-+ {Opt_udba, "udba=%s"},
-+
-+ {Opt_dio, "dio"},
-+ {Opt_nodio, "nodio"},
-+
-+#ifdef CONFIG_AUFS_DIRREN
-+ {Opt_dirren, "dirren"},
-+ {Opt_nodirren, "nodirren"},
-+#else
-+ {Opt_ignore, "dirren"},
-+ {Opt_ignore_silent, "nodirren"},
-+#endif
-+
-+#ifdef CONFIG_AUFS_FHSM
-+ {Opt_fhsm_sec, "fhsm_sec=%d"},
-+#else
-+ {Opt_ignore, "fhsm_sec=%d"},
-+#endif
-+
-+ {Opt_diropq_a, "diropq=always"},
-+ {Opt_diropq_a, "diropq=a"},
-+ {Opt_diropq_w, "diropq=whiteouted"},
-+ {Opt_diropq_w, "diropq=w"},
-+
-+ {Opt_warn_perm, "warn_perm"},
-+ {Opt_nowarn_perm, "nowarn_perm"},
-+
-+ /* keep them temporary */
-+ {Opt_ignore_silent, "nodlgt"},
-+ {Opt_ignore, "clean_plink"},
-+
-+#ifdef CONFIG_AUFS_SHWH
-+ {Opt_shwh, "shwh"},
-+#endif
-+ {Opt_noshwh, "noshwh"},
-+
-+ {Opt_dirperm1, "dirperm1"},
-+ {Opt_nodirperm1, "nodirperm1"},
-+
-+ {Opt_verbose, "verbose"},
-+ {Opt_verbose, "v"},
-+ {Opt_noverbose, "noverbose"},
-+ {Opt_noverbose, "quiet"},
-+ {Opt_noverbose, "q"},
-+ {Opt_noverbose, "silent"},
-+
-+ {Opt_sum, "sum"},
-+ {Opt_nosum, "nosum"},
-+ {Opt_wsum, "wsum"},
-+
-+ {Opt_rdcache, "rdcache=%d"},
-+ {Opt_rdblk, "rdblk=%d"},
-+ {Opt_rdblk_def, "rdblk=def"},
-+ {Opt_rdhash, "rdhash=%d"},
-+ {Opt_rdhash_def, "rdhash=def"},
-+
-+ {Opt_wbr_create, "create=%s"},
-+ {Opt_wbr_create, "create_policy=%s"},
-+ {Opt_wbr_copyup, "cpup=%s"},
-+ {Opt_wbr_copyup, "copyup=%s"},
-+ {Opt_wbr_copyup, "copyup_policy=%s"},
-+
-+ /* generic VFS flag */
-+#ifdef CONFIG_FS_POSIX_ACL
-+ {Opt_acl, "acl"},
-+ {Opt_noacl, "noacl"},
-+#else
-+ {Opt_ignore, "acl"},
-+ {Opt_ignore_silent, "noacl"},
-+#endif
-+
-+ /* internal use for the scripts */
-+ {Opt_ignore_silent, "si=%s"},
-+
-+ {Opt_br, "dirs=%s"},
-+ {Opt_ignore, "debug=%d"},
-+ {Opt_ignore, "delete=whiteout"},
-+ {Opt_ignore, "delete=all"},
-+ {Opt_ignore, "imap=%s"},
-+
-+ /* temporary workaround, due to old mount(8)? */
-+ {Opt_ignore_silent, "relatime"},
-+
-+ {Opt_err, NULL}
-+};
-+
-+/* ---------------------------------------------------------------------- */
-+
+static const char *au_parser_pattern(int val, match_table_t tbl)
+{
+ struct match_token *p;
+ return q - str->a;
+}
+
-+static int noinline_for_stack br_perm_val(char *perm)
++int au_br_perm_val(char *perm)
+{
+ int val, bad, sz;
+ char *p;
+ {-1, NULL}
+};
+
-+static int noinline_for_stack udba_val(char *str)
++int au_udba_val(char *str)
+{
+ substring_t args[MAX_OPT_ARGS];
+
+ return err;
+}
+
-+static int noinline_for_stack
-+au_wbr_create_val(char *str, struct au_opt_wbr_create *create)
++int au_wbr_create_val(char *str, struct au_opt_wbr_create *create)
+{
+ int err, e;
+ substring_t args[MAX_OPT_ARGS];
+ err = e;
+ break;
+ }
-+ /*FALLTHROUGH*/
++ fallthrough;
+ case AuWbrCreate_MFS:
+ case AuWbrCreate_PMFS:
+ create->mfs_second = AUFS_MFS_DEF_SEC;
+ {-1, NULL}
+};
+
-+static int noinline_for_stack au_wbr_copyup_val(char *str)
++int au_wbr_copyup_val(char *str)
+{
+ substring_t args[MAX_OPT_ARGS];
+
+
+/* ---------------------------------------------------------------------- */
+
-+static const int lkup_dirflags = LOOKUP_FOLLOW | LOOKUP_DIRECTORY;
-+
-+static void dump_opts(struct au_opts *opts)
-+{
-+#ifdef CONFIG_AUFS_DEBUG
-+ /* reduce stack space */
-+ union {
-+ struct au_opt_add *add;
-+ struct au_opt_del *del;
-+ struct au_opt_mod *mod;
-+ struct au_opt_xino *xino;
-+ struct au_opt_xino_itrunc *xino_itrunc;
-+ struct au_opt_wbr_create *create;
-+ } u;
-+ struct au_opt *opt;
-+
-+ opt = opts->opt;
-+ while (opt->type != Opt_tail) {
-+ switch (opt->type) {
-+ case Opt_add:
-+ u.add = &opt->add;
-+ AuDbg("add {b%d, %s, 0x%x, %p}\n",
-+ u.add->bindex, u.add->pathname, u.add->perm,
-+ u.add->path.dentry);
-+ break;
-+ case Opt_del:
-+ case Opt_idel:
-+ u.del = &opt->del;
-+ AuDbg("del {%s, %p}\n",
-+ u.del->pathname, u.del->h_path.dentry);
-+ break;
-+ case Opt_mod:
-+ case Opt_imod:
-+ u.mod = &opt->mod;
-+ AuDbg("mod {%s, 0x%x, %p}\n",
-+ u.mod->path, u.mod->perm, u.mod->h_root);
-+ break;
-+ case Opt_append:
-+ u.add = &opt->add;
-+ AuDbg("append {b%d, %s, 0x%x, %p}\n",
-+ u.add->bindex, u.add->pathname, u.add->perm,
-+ u.add->path.dentry);
-+ break;
-+ case Opt_prepend:
-+ u.add = &opt->add;
-+ AuDbg("prepend {b%d, %s, 0x%x, %p}\n",
-+ u.add->bindex, u.add->pathname, u.add->perm,
-+ u.add->path.dentry);
-+ break;
-+ case Opt_dirwh:
-+ AuDbg("dirwh %d\n", opt->dirwh);
-+ break;
-+ case Opt_rdcache:
-+ AuDbg("rdcache %d\n", opt->rdcache);
-+ break;
-+ case Opt_rdblk:
-+ AuDbg("rdblk %u\n", opt->rdblk);
-+ break;
-+ case Opt_rdblk_def:
-+ AuDbg("rdblk_def\n");
-+ break;
-+ case Opt_rdhash:
-+ AuDbg("rdhash %u\n", opt->rdhash);
-+ break;
-+ case Opt_rdhash_def:
-+ AuDbg("rdhash_def\n");
-+ break;
-+ case Opt_xino:
-+ u.xino = &opt->xino;
-+ AuDbg("xino {%s %pD}\n", u.xino->path, u.xino->file);
-+ break;
-+ case Opt_trunc_xino:
-+ AuLabel(trunc_xino);
-+ break;
-+ case Opt_notrunc_xino:
-+ AuLabel(notrunc_xino);
-+ break;
-+ case Opt_trunc_xino_path:
-+ case Opt_itrunc_xino:
-+ u.xino_itrunc = &opt->xino_itrunc;
-+ AuDbg("trunc_xino %d\n", u.xino_itrunc->bindex);
-+ break;
-+ case Opt_noxino:
-+ AuLabel(noxino);
-+ break;
-+ case Opt_trunc_xib:
-+ AuLabel(trunc_xib);
-+ break;
-+ case Opt_notrunc_xib:
-+ AuLabel(notrunc_xib);
-+ break;
-+ case Opt_shwh:
-+ AuLabel(shwh);
-+ break;
-+ case Opt_noshwh:
-+ AuLabel(noshwh);
-+ break;
-+ case Opt_dirperm1:
-+ AuLabel(dirperm1);
-+ break;
-+ case Opt_nodirperm1:
-+ AuLabel(nodirperm1);
-+ break;
-+ case Opt_plink:
-+ AuLabel(plink);
-+ break;
-+ case Opt_noplink:
-+ AuLabel(noplink);
-+ break;
-+ case Opt_list_plink:
-+ AuLabel(list_plink);
-+ break;
-+ case Opt_udba:
-+ AuDbg("udba %d, %s\n",
-+ opt->udba, au_optstr_udba(opt->udba));
-+ break;
-+ case Opt_dio:
-+ AuLabel(dio);
-+ break;
-+ case Opt_nodio:
-+ AuLabel(nodio);
-+ break;
-+ case Opt_diropq_a:
-+ AuLabel(diropq_a);
-+ break;
-+ case Opt_diropq_w:
-+ AuLabel(diropq_w);
-+ break;
-+ case Opt_warn_perm:
-+ AuLabel(warn_perm);
-+ break;
-+ case Opt_nowarn_perm:
-+ AuLabel(nowarn_perm);
-+ break;
-+ case Opt_verbose:
-+ AuLabel(verbose);
-+ break;
-+ case Opt_noverbose:
-+ AuLabel(noverbose);
-+ break;
-+ case Opt_sum:
-+ AuLabel(sum);
-+ break;
-+ case Opt_nosum:
-+ AuLabel(nosum);
-+ break;
-+ case Opt_wsum:
-+ AuLabel(wsum);
-+ break;
-+ case Opt_wbr_create:
-+ u.create = &opt->wbr_create;
-+ AuDbg("create %d, %s\n", u.create->wbr_create,
-+ au_optstr_wbr_create(u.create->wbr_create));
-+ switch (u.create->wbr_create) {
-+ case AuWbrCreate_MFSV:
-+ case AuWbrCreate_PMFSV:
-+ AuDbg("%d sec\n", u.create->mfs_second);
-+ break;
-+ case AuWbrCreate_MFSRR:
-+ case AuWbrCreate_TDMFS:
-+ AuDbg("%llu watermark\n",
-+ u.create->mfsrr_watermark);
-+ break;
-+ case AuWbrCreate_MFSRRV:
-+ case AuWbrCreate_TDMFSV:
-+ case AuWbrCreate_PMFSRRV:
-+ AuDbg("%llu watermark, %d sec\n",
-+ u.create->mfsrr_watermark,
-+ u.create->mfs_second);
-+ break;
-+ }
-+ break;
-+ case Opt_wbr_copyup:
-+ AuDbg("copyup %d, %s\n", opt->wbr_copyup,
-+ au_optstr_wbr_copyup(opt->wbr_copyup));
-+ break;
-+ case Opt_fhsm_sec:
-+ AuDbg("fhsm_sec %u\n", opt->fhsm_second);
-+ break;
-+ case Opt_dirren:
-+ AuLabel(dirren);
-+ break;
-+ case Opt_nodirren:
-+ AuLabel(nodirren);
-+ break;
-+ case Opt_acl:
-+ AuLabel(acl);
-+ break;
-+ case Opt_noacl:
-+ AuLabel(noacl);
-+ break;
-+ default:
-+ BUG();
-+ }
-+ opt++;
-+ }
-+#endif
-+}
-+
-+void au_opts_free(struct au_opts *opts)
-+{
-+ struct au_opt *opt;
-+
-+ opt = opts->opt;
-+ while (opt->type != Opt_tail) {
-+ switch (opt->type) {
-+ case Opt_add:
-+ case Opt_append:
-+ case Opt_prepend:
-+ path_put(&opt->add.path);
-+ break;
-+ case Opt_del:
-+ case Opt_idel:
-+ path_put(&opt->del.h_path);
-+ break;
-+ case Opt_mod:
-+ case Opt_imod:
-+ dput(opt->mod.h_root);
-+ break;
-+ case Opt_xino:
-+ fput(opt->xino.file);
-+ break;
-+ }
-+ opt++;
-+ }
-+}
-+
-+static int opt_add(struct au_opt *opt, char *opt_str, unsigned long sb_flags,
-+ aufs_bindex_t bindex)
++int au_opt_add(struct au_opt *opt, char *opt_str, unsigned long sb_flags,
++ aufs_bindex_t bindex)
+{
+ int err;
+ struct au_opt_add *add = &opt->add;
+ if (p) {
+ *p++ = 0;
+ if (*p)
-+ add->perm = br_perm_val(p);
++ add->perm = au_br_perm_val(p);
+ }
+
-+ err = vfsub_kern_path(add->pathname, lkup_dirflags, &add->path);
++ err = vfsub_kern_path(add->pathname, AuOpt_LkupDirFlags, &add->path);
+ if (!err) {
+ if (!p) {
+ add->perm = AuBrPerm_RO;
+ return err;
+}
+
-+static int au_opts_parse_del(struct au_opt_del *del, substring_t args[])
-+{
-+ int err;
-+
-+ del->pathname = args[0].from;
-+ AuDbg("del path %s\n", del->pathname);
-+
-+ err = vfsub_kern_path(del->pathname, lkup_dirflags, &del->h_path);
-+ if (unlikely(err))
-+ pr_err("lookup failed %s (%d)\n", del->pathname, err);
-+
-+ return err;
-+}
-+
-+#if 0 /* reserved for future use */
-+static int au_opts_parse_idel(struct super_block *sb, aufs_bindex_t bindex,
-+ struct au_opt_del *del, substring_t args[])
-+{
-+ int err;
-+ struct dentry *root;
-+
-+ err = -EINVAL;
-+ root = sb->s_root;
-+ aufs_read_lock(root, AuLock_FLUSH);
-+ if (bindex < 0 || au_sbbot(sb) < bindex) {
-+ pr_err("out of bounds, %d\n", bindex);
-+ goto out;
-+ }
-+
-+ err = 0;
-+ del->h_path.dentry = dget(au_h_dptr(root, bindex));
-+ del->h_path.mnt = mntget(au_sbr_mnt(sb, bindex));
-+
-+out:
-+ aufs_read_unlock(root, !AuLock_IR);
-+ return err;
-+}
-+#endif
-+
-+static int noinline_for_stack
-+au_opts_parse_mod(struct au_opt_mod *mod, substring_t args[])
-+{
-+ int err;
-+ struct path path;
-+ char *p;
-+
-+ err = -EINVAL;
-+ mod->path = args[0].from;
-+ p = strchr(mod->path, '=');
-+ if (unlikely(!p)) {
-+ pr_err("no permission %s\n", args[0].from);
-+ goto out;
-+ }
-+
-+ *p++ = 0;
-+ err = vfsub_kern_path(mod->path, lkup_dirflags, &path);
-+ if (unlikely(err)) {
-+ pr_err("lookup failed %s (%d)\n", mod->path, err);
-+ goto out;
-+ }
-+
-+ mod->perm = br_perm_val(p);
-+ AuDbg("mod path %s, perm 0x%x, %s\n", mod->path, mod->perm, p);
-+ mod->h_root = dget(path.dentry);
-+ path_put(&path);
-+
-+out:
-+ return err;
-+}
-+
-+#if 0 /* reserved for future use */
-+static int au_opts_parse_imod(struct super_block *sb, aufs_bindex_t bindex,
-+ struct au_opt_mod *mod, substring_t args[])
-+{
-+ int err;
-+ struct dentry *root;
-+
-+ err = -EINVAL;
-+ root = sb->s_root;
-+ aufs_read_lock(root, AuLock_FLUSH);
-+ if (bindex < 0 || au_sbbot(sb) < bindex) {
-+ pr_err("out of bounds, %d\n", bindex);
-+ goto out;
-+ }
-+
-+ err = 0;
-+ mod->perm = br_perm_val(args[1].from);
-+ AuDbg("mod path %s, perm 0x%x, %s\n",
-+ mod->path, mod->perm, args[1].from);
-+ mod->h_root = dget(au_h_dptr(root, bindex));
-+
-+out:
-+ aufs_read_unlock(root, !AuLock_IR);
-+ return err;
-+}
-+#endif
-+
-+static int au_opts_parse_xino(struct super_block *sb, struct au_opt_xino *xino,
-+ substring_t args[])
-+{
-+ int err;
-+ struct file *file;
-+
-+ file = au_xino_create(sb, args[0].from, /*silent*/0, /*wbrtop*/0);
-+ err = PTR_ERR(file);
-+ if (IS_ERR(file))
-+ goto out;
-+
-+ err = -EINVAL;
-+ if (unlikely(file->f_path.dentry->d_sb == sb)) {
-+ fput(file);
-+ pr_err("%s must be outside\n", args[0].from);
-+ goto out;
-+ }
-+
-+ err = 0;
-+ xino->file = file;
-+ xino->path = args[0].from;
-+
-+out:
-+ return err;
-+}
-+
-+static int noinline_for_stack
-+au_opts_parse_xino_itrunc_path(struct super_block *sb,
-+ struct au_opt_xino_itrunc *xino_itrunc,
-+ substring_t args[])
-+{
-+ int err;
-+ aufs_bindex_t bbot, bindex;
-+ struct path path;
-+ struct dentry *root;
-+
-+ err = vfsub_kern_path(args[0].from, lkup_dirflags, &path);
-+ if (unlikely(err)) {
-+ pr_err("lookup failed %s (%d)\n", args[0].from, err);
-+ goto out;
-+ }
-+
-+ xino_itrunc->bindex = -1;
-+ root = sb->s_root;
-+ aufs_read_lock(root, AuLock_FLUSH);
-+ bbot = au_sbbot(sb);
-+ for (bindex = 0; bindex <= bbot; bindex++) {
-+ if (au_h_dptr(root, bindex) == path.dentry) {
-+ xino_itrunc->bindex = bindex;
-+ break;
-+ }
-+ }
-+ aufs_read_unlock(root, !AuLock_IR);
-+ path_put(&path);
-+
-+ if (unlikely(xino_itrunc->bindex < 0)) {
-+ pr_err("no such branch %s\n", args[0].from);
-+ err = -EINVAL;
-+ }
-+
-+out:
-+ return err;
-+}
-+
-+/* called without aufs lock */
-+int au_opts_parse(struct super_block *sb, char *str, struct au_opts *opts)
-+{
-+ int err, n, token;
-+ aufs_bindex_t bindex;
-+ unsigned char skipped;
-+ struct dentry *root;
-+ struct au_opt *opt, *opt_tail;
-+ char *opt_str;
-+ /* reduce the stack space */
-+ union {
-+ struct au_opt_xino_itrunc *xino_itrunc;
-+ struct au_opt_wbr_create *create;
-+ } u;
-+ struct {
-+ substring_t args[MAX_OPT_ARGS];
-+ } *a;
-+
-+ err = -ENOMEM;
-+ a = kmalloc(sizeof(*a), GFP_NOFS);
-+ if (unlikely(!a))
-+ goto out;
-+
-+ root = sb->s_root;
-+ err = 0;
-+ bindex = 0;
-+ opt = opts->opt;
-+ opt_tail = opt + opts->max_opt - 1;
-+ opt->type = Opt_tail;
-+ while (!err && (opt_str = strsep(&str, ",")) && *opt_str) {
-+ err = -EINVAL;
-+ skipped = 0;
-+ token = match_token(opt_str, options, a->args);
-+ switch (token) {
-+ case Opt_br:
-+ err = 0;
-+ while (!err && (opt_str = strsep(&a->args[0].from, ":"))
-+ && *opt_str) {
-+ err = opt_add(opt, opt_str, opts->sb_flags,
-+ bindex++);
-+ if (unlikely(!err && ++opt > opt_tail)) {
-+ err = -E2BIG;
-+ break;
-+ }
-+ opt->type = Opt_tail;
-+ skipped = 1;
-+ }
-+ break;
-+ case Opt_add:
-+ if (unlikely(match_int(&a->args[0], &n))) {
-+ pr_err("bad integer in %s\n", opt_str);
-+ break;
-+ }
-+ bindex = n;
-+ err = opt_add(opt, a->args[1].from, opts->sb_flags,
-+ bindex);
-+ if (!err)
-+ opt->type = token;
-+ break;
-+ case Opt_append:
-+ err = opt_add(opt, a->args[0].from, opts->sb_flags,
-+ /*dummy bindex*/1);
-+ if (!err)
-+ opt->type = token;
-+ break;
-+ case Opt_prepend:
-+ err = opt_add(opt, a->args[0].from, opts->sb_flags,
-+ /*bindex*/0);
-+ if (!err)
-+ opt->type = token;
-+ break;
-+ case Opt_del:
-+ err = au_opts_parse_del(&opt->del, a->args);
-+ if (!err)
-+ opt->type = token;
-+ break;
-+#if 0 /* reserved for future use */
-+ case Opt_idel:
-+ del->pathname = "(indexed)";
-+ if (unlikely(match_int(&args[0], &n))) {
-+ pr_err("bad integer in %s\n", opt_str);
-+ break;
-+ }
-+ err = au_opts_parse_idel(sb, n, &opt->del, a->args);
-+ if (!err)
-+ opt->type = token;
-+ break;
-+#endif
-+ case Opt_mod:
-+ err = au_opts_parse_mod(&opt->mod, a->args);
-+ if (!err)
-+ opt->type = token;
-+ break;
-+#ifdef IMOD /* reserved for future use */
-+ case Opt_imod:
-+ u.mod->path = "(indexed)";
-+ if (unlikely(match_int(&a->args[0], &n))) {
-+ pr_err("bad integer in %s\n", opt_str);
-+ break;
-+ }
-+ err = au_opts_parse_imod(sb, n, &opt->mod, a->args);
-+ if (!err)
-+ opt->type = token;
-+ break;
-+#endif
-+ case Opt_xino:
-+ err = au_opts_parse_xino(sb, &opt->xino, a->args);
-+ if (!err)
-+ opt->type = token;
-+ break;
-+
-+ case Opt_trunc_xino_path:
-+ err = au_opts_parse_xino_itrunc_path
-+ (sb, &opt->xino_itrunc, a->args);
-+ if (!err)
-+ opt->type = token;
-+ break;
-+
-+ case Opt_itrunc_xino:
-+ u.xino_itrunc = &opt->xino_itrunc;
-+ if (unlikely(match_int(&a->args[0], &n))) {
-+ pr_err("bad integer in %s\n", opt_str);
-+ break;
-+ }
-+ u.xino_itrunc->bindex = n;
-+ aufs_read_lock(root, AuLock_FLUSH);
-+ if (n < 0 || au_sbbot(sb) < n) {
-+ pr_err("out of bounds, %d\n", n);
-+ aufs_read_unlock(root, !AuLock_IR);
-+ break;
-+ }
-+ aufs_read_unlock(root, !AuLock_IR);
-+ err = 0;
-+ opt->type = token;
-+ break;
-+
-+ case Opt_dirwh:
-+ if (unlikely(match_int(&a->args[0], &opt->dirwh)))
-+ break;
-+ err = 0;
-+ opt->type = token;
-+ break;
-+
-+ case Opt_rdcache:
-+ if (unlikely(match_int(&a->args[0], &n))) {
-+ pr_err("bad integer in %s\n", opt_str);
-+ break;
-+ }
-+ if (unlikely(n > AUFS_RDCACHE_MAX)) {
-+ pr_err("rdcache must be smaller than %d\n",
-+ AUFS_RDCACHE_MAX);
-+ break;
-+ }
-+ opt->rdcache = n;
-+ err = 0;
-+ opt->type = token;
-+ break;
-+ case Opt_rdblk:
-+ if (unlikely(match_int(&a->args[0], &n)
-+ || n < 0
-+ || n > KMALLOC_MAX_SIZE)) {
-+ pr_err("bad integer in %s\n", opt_str);
-+ break;
-+ }
-+ if (unlikely(n && n < NAME_MAX)) {
-+ pr_err("rdblk must be larger than %d\n",
-+ NAME_MAX);
-+ break;
-+ }
-+ opt->rdblk = n;
-+ err = 0;
-+ opt->type = token;
-+ break;
-+ case Opt_rdhash:
-+ if (unlikely(match_int(&a->args[0], &n)
-+ || n < 0
-+ || n * sizeof(struct hlist_head)
-+ > KMALLOC_MAX_SIZE)) {
-+ pr_err("bad integer in %s\n", opt_str);
-+ break;
-+ }
-+ opt->rdhash = n;
-+ err = 0;
-+ opt->type = token;
-+ break;
-+
-+ case Opt_trunc_xino:
-+ case Opt_notrunc_xino:
-+ case Opt_noxino:
-+ case Opt_trunc_xib:
-+ case Opt_notrunc_xib:
-+ case Opt_shwh:
-+ case Opt_noshwh:
-+ case Opt_dirperm1:
-+ case Opt_nodirperm1:
-+ case Opt_plink:
-+ case Opt_noplink:
-+ case Opt_list_plink:
-+ case Opt_dio:
-+ case Opt_nodio:
-+ case Opt_diropq_a:
-+ case Opt_diropq_w:
-+ case Opt_warn_perm:
-+ case Opt_nowarn_perm:
-+ case Opt_verbose:
-+ case Opt_noverbose:
-+ case Opt_sum:
-+ case Opt_nosum:
-+ case Opt_wsum:
-+ case Opt_rdblk_def:
-+ case Opt_rdhash_def:
-+ case Opt_dirren:
-+ case Opt_nodirren:
-+ case Opt_acl:
-+ case Opt_noacl:
-+ err = 0;
-+ opt->type = token;
-+ break;
-+
-+ case Opt_udba:
-+ opt->udba = udba_val(a->args[0].from);
-+ if (opt->udba >= 0) {
-+ err = 0;
-+ opt->type = token;
-+ } else
-+ pr_err("wrong value, %s\n", opt_str);
-+ break;
-+
-+ case Opt_wbr_create:
-+ u.create = &opt->wbr_create;
-+ u.create->wbr_create
-+ = au_wbr_create_val(a->args[0].from, u.create);
-+ if (u.create->wbr_create >= 0) {
-+ err = 0;
-+ opt->type = token;
-+ } else
-+ pr_err("wrong value, %s\n", opt_str);
-+ break;
-+ case Opt_wbr_copyup:
-+ opt->wbr_copyup = au_wbr_copyup_val(a->args[0].from);
-+ if (opt->wbr_copyup >= 0) {
-+ err = 0;
-+ opt->type = token;
-+ } else
-+ pr_err("wrong value, %s\n", opt_str);
-+ break;
-+
-+ case Opt_fhsm_sec:
-+ if (unlikely(match_int(&a->args[0], &n)
-+ || n < 0)) {
-+ pr_err("bad integer in %s\n", opt_str);
-+ break;
-+ }
-+ if (sysaufs_brs) {
-+ opt->fhsm_second = n;
-+ opt->type = token;
-+ } else
-+ pr_warn("ignored %s\n", opt_str);
-+ err = 0;
-+ break;
-+
-+ case Opt_ignore:
-+ pr_warn("ignored %s\n", opt_str);
-+ /*FALLTHROUGH*/
-+ case Opt_ignore_silent:
-+ skipped = 1;
-+ err = 0;
-+ break;
-+ case Opt_err:
-+ pr_err("unknown option %s\n", opt_str);
-+ break;
-+ }
-+
-+ if (!err && !skipped) {
-+ if (unlikely(++opt > opt_tail)) {
-+ err = -E2BIG;
-+ opt--;
-+ opt->type = Opt_tail;
-+ break;
-+ }
-+ opt->type = Opt_tail;
-+ }
-+ }
-+
-+ au_kfree_rcu(a);
-+ dump_opts(opts);
-+ if (unlikely(err))
-+ au_opts_free(opts);
-+
-+out:
-+ return err;
-+}
-+
+static int au_opt_wbr_create(struct super_block *sb,
+ struct au_opt_wbr_create *create)
+{
+ 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:
+ break;
+
+ case Opt_plink:
-+ au_opt_set(sbinfo->si_mntflags, PLINK);
-+ break;
-+ case Opt_noplink:
-+ if (au_opt_test(sbinfo->si_mntflags, PLINK))
-+ au_plink_put(sb, /*verbose*/1);
-+ au_opt_clr(sbinfo->si_mntflags, PLINK);
++ if (opt->tf)
++ au_opt_set(sbinfo->si_mntflags, PLINK);
++ else {
++ if (au_opt_test(sbinfo->si_mntflags, PLINK))
++ au_plink_put(sb, /*verbose*/1);
++ au_opt_clr(sbinfo->si_mntflags, PLINK);
++ }
+ break;
+ case Opt_list_plink:
+ if (au_opt_test(sbinfo->si_mntflags, PLINK))
+ break;
+
+ case Opt_dio:
-+ au_opt_set(sbinfo->si_mntflags, DIO);
-+ au_fset_opts(opts->flags, REFRESH_DYAOP);
-+ break;
-+ case Opt_nodio:
-+ au_opt_clr(sbinfo->si_mntflags, DIO);
-+ au_fset_opts(opts->flags, REFRESH_DYAOP);
++ if (opt->tf) {
++ au_opt_set(sbinfo->si_mntflags, DIO);
++ au_fset_opts(opts->flags, REFRESH_DYAOP);
++ } else {
++ au_opt_clr(sbinfo->si_mntflags, DIO);
++ au_fset_opts(opts->flags, REFRESH_DYAOP);
++ }
+ break;
+
+ case Opt_fhsm_sec:
+ break;
+
+ case Opt_warn_perm:
-+ au_opt_set(sbinfo->si_mntflags, WARN_PERM);
-+ break;
-+ case Opt_nowarn_perm:
-+ au_opt_clr(sbinfo->si_mntflags, WARN_PERM);
++ if (opt->tf)
++ au_opt_set(sbinfo->si_mntflags, WARN_PERM);
++ else
++ au_opt_clr(sbinfo->si_mntflags, WARN_PERM);
+ break;
+
+ case Opt_verbose:
-+ au_opt_set(sbinfo->si_mntflags, VERBOSE);
-+ break;
-+ case Opt_noverbose:
-+ au_opt_clr(sbinfo->si_mntflags, VERBOSE);
++ if (opt->tf)
++ au_opt_set(sbinfo->si_mntflags, VERBOSE);
++ else
++ au_opt_clr(sbinfo->si_mntflags, VERBOSE);
+ break;
+
+ case Opt_sum:
-+ au_opt_set(sbinfo->si_mntflags, SUM);
++ if (opt->tf)
++ au_opt_set(sbinfo->si_mntflags, SUM);
++ else {
++ au_opt_clr(sbinfo->si_mntflags, SUM);
++ au_opt_clr(sbinfo->si_mntflags, SUM_W);
++ }
+ break;
+ case Opt_wsum:
+ au_opt_clr(sbinfo->si_mntflags, SUM);
+ au_opt_set(sbinfo->si_mntflags, SUM_W);
+ break;
-+ case Opt_nosum:
-+ au_opt_clr(sbinfo->si_mntflags, SUM);
-+ au_opt_clr(sbinfo->si_mntflags, SUM_W);
-+ break;
+
+ case Opt_wbr_create:
+ err = au_opt_wbr_create(sb, &opt->wbr_create);
+ case Opt_rdblk:
+ sbinfo->si_rdblk = opt->rdblk;
+ break;
-+ case Opt_rdblk_def:
-+ sbinfo->si_rdblk = AUFS_RDBLK_DEF;
-+ break;
+ case Opt_rdhash:
+ sbinfo->si_rdhash = opt->rdhash;
+ break;
-+ case Opt_rdhash_def:
-+ sbinfo->si_rdhash = AUFS_RDHASH_DEF;
-+ break;
+
+ case Opt_shwh:
-+ au_opt_set(sbinfo->si_mntflags, SHWH);
-+ break;
-+ case Opt_noshwh:
-+ au_opt_clr(sbinfo->si_mntflags, SHWH);
++ if (opt->tf)
++ au_opt_set(sbinfo->si_mntflags, SHWH);
++ else
++ au_opt_clr(sbinfo->si_mntflags, SHWH);
+ break;
+
+ case Opt_dirperm1:
-+ au_opt_set(sbinfo->si_mntflags, DIRPERM1);
-+ break;
-+ case Opt_nodirperm1:
-+ au_opt_clr(sbinfo->si_mntflags, DIRPERM1);
++ if (opt->tf)
++ au_opt_set(sbinfo->si_mntflags, DIRPERM1);
++ else
++ au_opt_clr(sbinfo->si_mntflags, DIRPERM1);
+ break;
+
+ case Opt_trunc_xino:
-+ au_opt_set(sbinfo->si_mntflags, TRUNC_XINO);
-+ break;
-+ case Opt_notrunc_xino:
-+ au_opt_clr(sbinfo->si_mntflags, TRUNC_XINO);
++ if (opt->tf)
++ au_opt_set(sbinfo->si_mntflags, TRUNC_XINO);
++ else
++ au_opt_clr(sbinfo->si_mntflags, TRUNC_XINO);
+ break;
+
+ case Opt_trunc_xino_path:
+ break;
+
+ case Opt_trunc_xib:
-+ au_fset_opts(opts->flags, TRUNC_XIB);
-+ break;
-+ case Opt_notrunc_xib:
-+ au_fclr_opts(opts->flags, TRUNC_XIB);
++ if (opt->tf)
++ au_fset_opts(opts->flags, TRUNC_XIB);
++ else
++ au_fclr_opts(opts->flags, TRUNC_XIB);
+ break;
+
+ case Opt_dirren:
+ err = 1;
-+ if (!au_opt_test(sbinfo->si_mntflags, DIRREN)) {
-+ err = au_dr_opt_set(sb);
-+ if (!err)
-+ err = 1;
-+ }
-+ if (err == 1)
-+ au_opt_set(sbinfo->si_mntflags, DIRREN);
-+ break;
-+ case Opt_nodirren:
-+ err = 1;
-+ if (au_opt_test(sbinfo->si_mntflags, DIRREN)) {
-+ err = au_dr_opt_clr(sb, au_ftest_opts(opts->flags,
-+ DR_FLUSHED));
-+ if (!err)
-+ err = 1;
++ if (opt->tf) {
++ if (!au_opt_test(sbinfo->si_mntflags, DIRREN)) {
++ err = au_dr_opt_set(sb);
++ if (!err)
++ err = 1;
++ }
++ if (err == 1)
++ au_opt_set(sbinfo->si_mntflags, DIRREN);
++ } else {
++ if (au_opt_test(sbinfo->si_mntflags, DIRREN)) {
++ err = au_dr_opt_clr(sb, au_ftest_opts(opts->flags,
++ DR_FLUSHED));
++ if (!err)
++ err = 1;
++ }
++ if (err == 1)
++ au_opt_clr(sbinfo->si_mntflags, DIRREN);
+ }
-+ if (err == 1)
-+ au_opt_clr(sbinfo->si_mntflags, DIRREN);
+ break;
+
+ case Opt_acl:
-+ sb->s_flags |= SB_POSIXACL;
-+ break;
-+ case Opt_noacl:
-+ sb->s_flags &= ~SB_POSIXACL;
++ if (opt->tf)
++ sb->s_flags |= SB_POSIXACL;
++ else
++ sb->s_flags &= ~SB_POSIXACL;
+ break;
+
+ default:
+ /* 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,
+ case Opt_xino:
+ err = au_xino_set(sb, &opt->xino,
+ !!au_ftest_opts(opts->flags, REMOUNT));
-+ if (unlikely(err))
-+ break;
-+
-+ *opt_xino = &opt->xino;
++ if (!err)
++ *opt_xino = &opt->xino;
+ break;
-+
+ case Opt_noxino:
+ au_xino_clr(sb);
+ *opt_xino = (void *)-1;
+}
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 2020-01-27 10:57:18.175538316 +0100
-@@ -0,0 +1,225 @@
++++ linux/fs/aufs/opts.h 2022-08-02 12:12:45.165641939 +0200
+@@ -0,0 +1,263 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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 __KERNEL__
+
++#include <linux/fs_parser.h>
++#include <linux/namei.h>
+#include <linux/path.h>
+
-+struct file;
++enum {
++ Opt_br,
++ Opt_add, Opt_del, Opt_mod, Opt_append, Opt_prepend,
++ Opt_idel, Opt_imod,
++ Opt_dirwh, Opt_rdcache, Opt_rdblk, Opt_rdhash,
++ Opt_xino, Opt_noxino,
++ Opt_trunc_xino, Opt_trunc_xino_v,
++ Opt_trunc_xino_path, Opt_itrunc_xino,
++ Opt_trunc_xib,
++ Opt_shwh,
++ Opt_plink, Opt_list_plink,
++ Opt_udba,
++ Opt_dio,
++ Opt_diropq, Opt_diropq_a, Opt_diropq_w,
++ Opt_warn_perm,
++ Opt_wbr_copyup, Opt_wbr_create,
++ Opt_fhsm_sec,
++ Opt_verbose, Opt_noverbose,
++ Opt_sum, Opt_wsum,
++ Opt_dirperm1,
++ Opt_dirren,
++ Opt_acl,
++ Opt_tail, Opt_ignore, Opt_ignore_silent, Opt_err
++};
+
+/* ---------------------------------------------------------------------- */
+
+ | AuOpt_UDBA_REVAL \
+ | AuOpt_UDBA_HNOTIFY)
+
++#define AuOpt_LkupDirFlags (LOOKUP_FOLLOW | LOOKUP_DIRECTORY)
++
+#define au_opt_test(flags, name) (flags & AuOpt_##name)
+#define au_opt_set(flags, name) do { \
+ BUILD_BUG_ON(AuOpt_##name & AuOptMask_UDBA); \
+
+/* ---------------------------------------------------------------------- */
+
++struct file;
++
+struct au_opt_add {
+ aufs_bindex_t bindex;
+ char *pathname;
+ struct au_opt_wbr_create wbr_create;
+ int wbr_copyup;
+ unsigned int fhsm_second;
++ bool tf; /* generic flag, true or false */
+ };
+};
+
+/* ---------------------------------------------------------------------- */
+
+/* opts.c */
++int au_br_perm_val(char *perm);
+void au_optstr_br_perm(au_br_perm_str_t *str, int perm);
++int au_udba_val(char *str);
+const char *au_optstr_udba(int udba);
-+const char *au_optstr_wbr_copyup(int wbr_copyup);
++int au_wbr_create_val(char *str, struct au_opt_wbr_create *create);
+const char *au_optstr_wbr_create(int wbr_create);
++int au_wbr_copyup_val(char *str);
++const char *au_optstr_wbr_copyup(int wbr_copyup);
+
-+void au_opts_free(struct au_opts *opts);
++int au_opt_add(struct au_opt *opt, char *opt_str, unsigned long sb_flags,
++ aufs_bindex_t bindex);
+struct super_block;
-+int au_opts_parse(struct super_block *sb, char *str, struct au_opts *opts);
+int au_opts_verify(struct super_block *sb, unsigned long sb_flags,
+ unsigned int pending);
+int au_opts_mount(struct super_block *sb, struct au_opts *opts);
+
+unsigned int au_opt_udba(struct super_block *sb);
+
++/* fsctx.c */
++int aufs_fsctx_init(struct fs_context *fc);
++extern const struct fs_parameter_spec aufs_fsctx_paramspec[];
++
+#endif /* __KERNEL__ */
+#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 2020-01-27 10:57:18.175538316 +0100
++++ linux/fs/aufs/plink.c 2022-08-02 12:12:45.165641939 +0200
@@ -0,0 +1,516 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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_do_plink_lkup_args {
+ struct dentry **errp;
+ struct qstr *tgtname;
-+ struct dentry *h_parent;
-+ struct au_branch *br;
++ struct path *h_ppath;
+};
+
+static struct dentry *au_do_plink_lkup(struct qstr *tgtname,
-+ struct dentry *h_parent,
-+ struct au_branch *br)
++ struct path *h_ppath)
+{
+ struct dentry *h_dentry;
+ struct inode *h_inode;
+
-+ h_inode = d_inode(h_parent);
++ h_inode = d_inode(h_ppath->dentry);
+ inode_lock_shared_nested(h_inode, AuLsc_I_CHILD2);
-+ h_dentry = vfsub_lkup_one(tgtname, h_parent);
++ h_dentry = vfsub_lkup_one(tgtname, h_ppath);
+ inode_unlock_shared(h_inode);
++
+ return h_dentry;
+}
+
+static void au_call_do_plink_lkup(void *args)
+{
+ struct au_do_plink_lkup_args *a = args;
-+ *a->errp = au_do_plink_lkup(a->tgtname, a->h_parent, a->br);
++ *a->errp = au_do_plink_lkup(a->tgtname, a->h_ppath);
+}
+
+/* lookup the plink-ed @inode under the branch at @bindex */
+struct dentry *au_plink_lkup(struct inode *inode, aufs_bindex_t bindex)
+{
-+ struct dentry *h_dentry, *h_parent;
++ struct dentry *h_dentry;
+ struct au_branch *br;
++ struct path h_ppath;
+ int wkq_err;
+ char a[PLINK_NAME_LEN];
+ struct qstr tgtname = QSTR_INIT(a, 0);
+ AuDebugOn(au_plink_maint(inode->i_sb, AuLock_NOPLM));
+
+ br = au_sbr(inode->i_sb, bindex);
-+ h_parent = br->br_wbr->wbr_plink;
++ h_ppath.dentry = br->br_wbr->wbr_plink;
++ h_ppath.mnt = au_br_mnt(br);
+ tgtname.len = plink_name(a, sizeof(a), inode, bindex);
+
+ if (!uid_eq(current_fsuid(), GLOBAL_ROOT_UID)) {
+ struct au_do_plink_lkup_args args = {
+ .errp = &h_dentry,
+ .tgtname = &tgtname,
-+ .h_parent = h_parent,
-+ .br = br
++ .h_ppath = &h_ppath
+ };
+
+ wkq_err = au_wkq_wait(au_call_do_plink_lkup, &args);
+ if (unlikely(wkq_err))
+ h_dentry = ERR_PTR(wkq_err);
+ } else
-+ h_dentry = au_do_plink_lkup(&tgtname, h_parent, br);
++ h_dentry = au_do_plink_lkup(&tgtname, &h_ppath);
+
+ return h_dentry;
+}
+
+/* create a pseudo-link */
-+static int do_whplink(struct qstr *tgt, struct dentry *h_parent,
-+ struct dentry *h_dentry, struct au_branch *br)
++static int do_whplink(struct qstr *tgt, struct path *h_ppath,
++ struct dentry *h_dentry)
+{
+ int err;
-+ struct path h_path = {
-+ .mnt = au_br_mnt(br)
-+ };
++ struct path h_path;
+ struct inode *h_dir, *delegated;
+
-+ h_dir = d_inode(h_parent);
++ h_dir = d_inode(h_ppath->dentry);
+ inode_lock_nested(h_dir, AuLsc_I_CHILD2);
++ h_path.mnt = h_ppath->mnt;
+again:
-+ h_path.dentry = vfsub_lkup_one(tgt, h_parent);
++ h_path.dentry = vfsub_lkup_one(tgt, h_ppath);
+ err = PTR_ERR(h_path.dentry);
+ if (IS_ERR(h_path.dentry))
+ goto out;
+struct do_whplink_args {
+ int *errp;
+ struct qstr *tgt;
-+ struct dentry *h_parent;
++ struct path *h_ppath;
+ struct dentry *h_dentry;
-+ struct au_branch *br;
+};
+
+static void call_do_whplink(void *args)
+{
+ struct do_whplink_args *a = args;
-+ *a->errp = do_whplink(a->tgt, a->h_parent, a->h_dentry, a->br);
++ *a->errp = do_whplink(a->tgt, a->h_ppath, a->h_dentry);
+}
+
+static int whplink(struct dentry *h_dentry, struct inode *inode,
-+ aufs_bindex_t bindex, struct au_branch *br)
++ aufs_bindex_t bindex)
+{
+ int err, wkq_err;
++ struct au_branch *br;
+ struct au_wbr *wbr;
-+ struct dentry *h_parent;
++ struct path h_ppath;
+ char a[PLINK_NAME_LEN];
+ struct qstr tgtname = QSTR_INIT(a, 0);
+
-+ wbr = au_sbr(inode->i_sb, bindex)->br_wbr;
-+ h_parent = wbr->wbr_plink;
++ br = au_sbr(inode->i_sb, bindex);
++ wbr = br->br_wbr;
++ h_ppath.dentry = wbr->wbr_plink;
++ h_ppath.mnt = au_br_mnt(br);
+ tgtname.len = plink_name(a, sizeof(a), inode, bindex);
+
+ /* always superio. */
+ struct do_whplink_args args = {
+ .errp = &err,
+ .tgt = &tgtname,
-+ .h_parent = h_parent,
-+ .h_dentry = h_dentry,
-+ .br = br
++ .h_ppath = &h_ppath,
++ .h_dentry = h_dentry
+ };
+ wkq_err = au_wkq_wait(call_do_whplink, &args);
+ if (unlikely(wkq_err))
+ err = wkq_err;
+ } else
-+ err = do_whplink(&tgtname, h_parent, h_dentry, br);
++ err = do_whplink(&tgtname, &h_ppath, h_dentry);
+
+ return err;
+}
+ if (cnt > AUFS_PLINK_WARN)
+ AuWarn1(msg ", %d\n", cnt);
+#undef msg
-+ err = whplink(h_dentry, inode, bindex, au_sbr(sb, bindex));
++ err = whplink(h_dentry, inode, bindex);
+ if (unlikely(err)) {
+ pr_warn("err %d, damaged pseudo link.\n", err);
+ au_hbl_del(&icntnr->plink, hbl);
+}
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 2020-01-27 10:57:18.175538316 +0100
++++ linux/fs/aufs/poll.c 2022-08-02 12:12:45.168975258 +0200
@@ -0,0 +1,51 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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 2020-01-27 10:57:18.175538316 +0100
-@@ -0,0 +1,105 @@
++++ linux/fs/aufs/posix_acl.c 2022-08-02 12:12:45.168975258 +0200
+@@ -0,0 +1,111 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2014-2020 Junjiro R. Okajima
++ * Copyright (C) 2014-2021 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
+#include <linux/fs.h>
+#include "aufs.h"
+
-+struct posix_acl *aufs_get_acl(struct inode *inode, int type)
++struct posix_acl *aufs_get_acl(struct inode *inode, int type, bool rcu)
+{
+ struct posix_acl *acl;
+ int err;
+ struct inode *h_inode;
+ struct super_block *sb;
+
++ acl = ERR_PTR(-ECHILD);
++ if (rcu)
++ goto out;
++
+ acl = NULL;
+ sb = inode->i_sb;
+ si_read_lock(sb, AuLock_FLUSH);
+ ii_read_lock_child(inode);
+ if (!(sb->s_flags & SB_POSIXACL))
-+ goto out;
++ goto unlock;
+
+ bindex = au_ibtop(inode);
+ h_inode = au_h_iptr(inode, bindex);
+ != (inode->i_mode & S_IFMT)))) {
+ err = au_busy_or_stale();
+ acl = ERR_PTR(err);
-+ goto out;
++ goto unlock;
+ }
+
+ /* always topmost only */
+ else
+ set_cached_acl(inode, type, acl);
+
-+out:
++unlock:
+ ii_read_unlock(inode);
+ si_read_unlock(sb);
+
++out:
+ AuTraceErrPtr(acl);
+ 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;
+}
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 2020-08-03 09:14:43.142321747 +0200
++++ linux/fs/aufs/procfs.c 2022-08-02 12:12:45.168975258 +0200
@@ -0,0 +1,170 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2010-2020 Junjiro R. Okajima
++ * Copyright (C) 2010-2021 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/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 2020-01-27 10:57:18.178871751 +0100
++++ linux/fs/aufs/rdu.c 2022-08-02 12:12:45.168975258 +0200
@@ -0,0 +1,384 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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 2020-01-27 10:57:18.178871751 +0100
-@@ -0,0 +1,73 @@
++++ linux/fs/aufs/rwsem.h 2022-08-02 12:12:45.168975258 +0200
+@@ -0,0 +1,85 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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 2020-01-27 10:57:18.178871751 +0100
-@@ -0,0 +1,314 @@
++++ linux/fs/aufs/sbinfo.c 2022-08-02 12:12:45.168975258 +0200
+@@ -0,0 +1,316 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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
+ au_kfree_rcu(sbinfo);
+}
+
-+int au_si_alloc(struct super_block *sb)
++struct au_sbinfo *au_si_alloc(struct super_block *sb)
+{
-+ int err, i;
+ struct au_sbinfo *sbinfo;
++ int err, i;
+
+ err = -ENOMEM;
+ sbinfo = kzalloc(sizeof(*sbinfo), GFP_NOFS);
+
+ /* leave other members for sysaufs and si_mnt. */
+ sbinfo->si_sb = sb;
-+ sb->s_fs_info = sbinfo;
-+ si_pid_set(sb);
-+ return 0; /* success */
++ if (sb) {
++ sb->s_fs_info = sbinfo;
++ si_pid_set(sb);
++ }
++ return sbinfo; /* success */
+
+out_br:
+ au_kfree_try_rcu(sbinfo->si_branch);
+out_sbinfo:
+ au_kfree_rcu(sbinfo);
+out:
-+ return err;
++ return ERR_PTR(err);
+}
+
+int au_sbr_realloc(struct au_sbinfo *sbinfo, int nbr, int may_shrink)
+}
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 2020-01-27 10:57:18.178871751 +0100
-@@ -0,0 +1,1047 @@
++++ linux/fs/aufs/super.c 2022-08-02 12:12:45.168975258 +0200
+@@ -0,0 +1,871 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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_icntnr *c;
+
-+ c = au_cache_alloc_icntnr();
++ c = au_cache_alloc_icntnr(sb);
+ if (c) {
+ au_icntnr_init(c);
+ inode_set_iversion(&c->vfs_inode, 1); /* sigen(sb); */
+ continue;
+
+ h_sb = au_sbr_sb(sb, bindex);
-+ e = vfsub_sync_filesystem(h_sb, wait);
++ e = vfsub_sync_filesystem(h_sb);
+ if (unlikely(e && !err))
+ err = e;
+ /* go on even if an error happens */
+ return err;
+}
+
-+static void au_remount_refresh(struct super_block *sb, unsigned int do_idop)
++void au_remount_refresh(struct super_block *sb, unsigned int do_idop)
+{
+ int err, e;
+ unsigned int udba;
+ AuIOErr("refresh failed, ignored, %d\n", err);
+}
+
-+/* stop extra interpretation of errno in mount(8), and strange error messages */
-+static int cvt_err(int err)
-+{
-+ AuTraceErr(err);
-+
-+ switch (err) {
-+ case -ENOENT:
-+ case -ENOTDIR:
-+ case -EEXIST:
-+ case -EIO:
-+ err = -EINVAL;
-+ }
-+ return err;
-+}
-+
-+static int aufs_remount_fs(struct super_block *sb, int *flags, char *data)
-+{
-+ int err, do_dx;
-+ unsigned int mntflags;
-+ struct au_opts opts = {
-+ .opt = NULL
-+ };
-+ struct dentry *root;
-+ struct inode *inode;
-+ struct au_sbinfo *sbinfo;
-+
-+ err = 0;
-+ root = sb->s_root;
-+ if (!data || !*data) {
-+ err = si_write_lock(sb, AuLock_FLUSH | AuLock_NOPLM);
-+ if (!err) {
-+ di_write_lock_child(root);
-+ err = au_opts_verify(sb, *flags, /*pending*/0);
-+ aufs_write_unlock(root);
-+ }
-+ goto out;
-+ }
-+
-+ err = -ENOMEM;
-+ opts.opt = (void *)__get_free_page(GFP_NOFS);
-+ if (unlikely(!opts.opt))
-+ goto out;
-+ opts.max_opt = PAGE_SIZE / sizeof(*opts.opt);
-+ opts.flags = AuOpts_REMOUNT;
-+ opts.sb_flags = *flags;
-+
-+ /* parse it before aufs lock */
-+ err = au_opts_parse(sb, data, &opts);
-+ if (unlikely(err))
-+ goto out_opts;
-+
-+ sbinfo = au_sbi(sb);
-+ inode = d_inode(root);
-+ inode_lock(inode);
-+ err = si_write_lock(sb, AuLock_FLUSH | AuLock_NOPLM);
-+ if (unlikely(err))
-+ goto out_mtx;
-+ di_write_lock_child(root);
-+
-+ /* au_opts_remount() may return an error */
-+ err = au_opts_remount(sb, &opts);
-+ au_opts_free(&opts);
-+
-+ if (au_ftest_opts(opts.flags, REFRESH))
-+ au_remount_refresh(sb, au_ftest_opts(opts.flags, REFRESH_IDOP));
-+
-+ if (au_ftest_opts(opts.flags, REFRESH_DYAOP)) {
-+ mntflags = au_mntflags(sb);
-+ do_dx = !!au_opt_test(mntflags, DIO);
-+ au_dy_arefresh(do_dx);
-+ }
-+
-+ au_fhsm_wrote_all(sb, /*force*/1); /* ?? */
-+ aufs_write_unlock(root);
-+
-+out_mtx:
-+ inode_unlock(inode);
-+out_opts:
-+ free_page((unsigned long)opts.opt);
-+out:
-+ err = cvt_err(err);
-+ AuTraceErr(err);
-+ return err;
-+}
-+
-+static const struct super_operations aufs_sop = {
++const struct super_operations aufs_sop = {
+ .alloc_inode = aufs_alloc_inode,
+ .destroy_inode = aufs_destroy_inode,
+ .free_inode = aufs_free_inode,
+ .show_options = aufs_show_options,
+ .statfs = aufs_statfs,
+ .put_super = aufs_put_super,
-+ .sync_fs = aufs_sync_fs,
-+ .remount_fs = aufs_remount_fs
++ .sync_fs = aufs_sync_fs
+};
+
+/* ---------------------------------------------------------------------- */
+
-+static int alloc_root(struct super_block *sb)
++int au_alloc_root(struct super_block *sb)
+{
+ int err;
+ struct inode *inode;
+ return err;
+}
+
-+static int aufs_fill_super(struct super_block *sb, void *raw_data,
-+ int silent __maybe_unused)
++/* ---------------------------------------------------------------------- */
++
++static void aufs_kill_sb(struct super_block *sb)
+{
-+ int err;
-+ struct au_opts opts = {
-+ .opt = NULL
-+ };
+ struct au_sbinfo *sbinfo;
+ struct dentry *root;
-+ struct inode *inode;
-+ char *arg = raw_data;
+
-+ if (unlikely(!arg || !*arg)) {
-+ err = -EINVAL;
-+ pr_err("no arg\n");
-+ goto out;
-+ }
-+
-+ err = -ENOMEM;
-+ opts.opt = (void *)__get_free_page(GFP_NOFS);
-+ if (unlikely(!opts.opt))
++ sbinfo = au_sbi(sb);
++ if (!sbinfo)
+ goto out;
-+ opts.max_opt = PAGE_SIZE / sizeof(*opts.opt);
-+ opts.sb_flags = sb->s_flags;
+
-+ err = au_si_alloc(sb);
-+ if (unlikely(err))
-+ goto out_opts;
-+ sbinfo = au_sbi(sb);
++ au_sbilist_del(sb);
+
-+ /* all timestamps always follow the ones on the branch */
-+ sb->s_flags |= SB_NOATIME | SB_NODIRATIME;
-+ sb->s_flags |= SB_I_VERSION; /* do we really need this? */
-+ sb->s_op = &aufs_sop;
-+ sb->s_d_op = &aufs_dop;
-+ sb->s_magic = AUFS_SUPER_MAGIC;
-+ sb->s_maxbytes = 0;
-+ sb->s_stack_depth = 1;
-+ au_export_init(sb);
-+ au_xattr_init(sb);
-+
-+ err = alloc_root(sb);
-+ if (unlikely(err)) {
-+ si_write_unlock(sb);
-+ goto out_info;
-+ }
+ root = sb->s_root;
-+ inode = d_inode(root);
-+
-+ /*
-+ * actually we can parse options regardless aufs lock here.
-+ * but at remount time, parsing must be done before aufs lock.
-+ * so we follow the same rule.
-+ */
-+ ii_write_lock_parent(inode);
-+ aufs_write_unlock(root);
-+ err = au_opts_parse(sb, arg, &opts);
-+ if (unlikely(err))
-+ goto out_root;
++ if (root)
++ aufs_write_lock(root);
++ else
++ __si_write_lock(sb);
+
-+ /* lock vfs_inode first, then aufs. */
-+ inode_lock(inode);
-+ aufs_write_lock(root);
-+ err = au_opts_mount(sb, &opts);
-+ au_opts_free(&opts);
-+ if (!err && au_ftest_si(sbinfo, NO_DREVAL)) {
-+ sb->s_d_op = &aufs_dop_noreval;
-+ pr_info("%ps\n", sb->s_d_op);
-+ au_refresh_dop(root, /*force_reval*/0);
-+ sbinfo->si_iop_array = aufs_iop_nogetattr;
-+ au_refresh_iop(inode, /*force_getattr*/0);
++ au_fhsm_fin(sb);
++ if (sbinfo->si_wbr_create_ops->fin)
++ sbinfo->si_wbr_create_ops->fin(sb);
++ if (au_opt_test(sbinfo->si_mntflags, UDBA_HNOTIFY)) {
++ au_opt_set_udba(sbinfo->si_mntflags, UDBA_NONE);
++ au_remount_refresh(sb, /*do_idop*/0);
+ }
-+ aufs_write_unlock(root);
-+ inode_unlock(inode);
-+ if (!err)
-+ goto out_opts; /* success */
-+
-+out_root:
-+ dput(root);
-+ sb->s_root = NULL;
-+out_info:
-+ kobject_put(&sbinfo->si_kobj);
-+ sb->s_fs_info = NULL;
-+out_opts:
-+ free_page((unsigned long)opts.opt);
-+out:
-+ AuTraceErr(err);
-+ err = cvt_err(err);
-+ AuTraceErr(err);
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+static struct dentry *aufs_mount(struct file_system_type *fs_type, int flags,
-+ const char *dev_name __maybe_unused,
-+ void *raw_data)
-+{
-+ struct dentry *root;
++ if (au_opt_test(sbinfo->si_mntflags, PLINK))
++ au_plink_put(sb, /*verbose*/1);
++ au_xino_clr(sb);
++ if (root)
++ au_dr_opt_flush(sb);
+
-+ /* all timestamps always follow the ones on the branch */
-+ /* mnt->mnt_flags |= MNT_NOATIME | MNT_NODIRATIME; */
-+ root = mount_nodev(fs_type, flags, raw_data, aufs_fill_super);
-+ if (IS_ERR(root))
-+ goto out;
++ if (root)
++ aufs_write_unlock(root);
++ else
++ __si_write_unlock(sb);
+
-+ au_sbilist_add(root->d_sb);
++ sbinfo->si_sb = NULL;
++ au_nwt_flush(&sbinfo->si_nowait);
+
+out:
-+ return root;
-+}
-+
-+static void aufs_kill_sb(struct super_block *sb)
-+{
-+ struct au_sbinfo *sbinfo;
-+
-+ sbinfo = au_sbi(sb);
-+ if (sbinfo) {
-+ au_sbilist_del(sb);
-+ aufs_write_lock(sb->s_root);
-+ au_fhsm_fin(sb);
-+ if (sbinfo->si_wbr_create_ops->fin)
-+ sbinfo->si_wbr_create_ops->fin(sb);
-+ if (au_opt_test(sbinfo->si_mntflags, UDBA_HNOTIFY)) {
-+ au_opt_set_udba(sbinfo->si_mntflags, UDBA_NONE);
-+ au_remount_refresh(sb, /*do_idop*/0);
-+ }
-+ if (au_opt_test(sbinfo->si_mntflags, PLINK))
-+ au_plink_put(sb, /*verbose*/1);
-+ au_xino_clr(sb);
-+ au_dr_opt_flush(sb);
-+ sbinfo->si_sb = NULL;
-+ aufs_write_unlock(sb->s_root);
-+ au_nwt_flush(&sbinfo->si_nowait);
-+ }
+ kill_anon_super(sb);
+}
+
+struct file_system_type aufs_fs_type = {
+ .name = AUFS_FSTYPE,
+ /* a race between rename and others */
-+ .fs_flags = FS_RENAME_DOES_D_MOVE,
-+ .mount = aufs_mount,
++ .fs_flags = FS_RENAME_DOES_D_MOVE
++ /* untested */
++ /*| FS_ALLOW_IDMAP*/
++ ,
++ .init_fs_context = aufs_fsctx_init,
++ .parameters = aufs_fsctx_paramspec,
+ .kill_sb = aufs_kill_sb,
+ /* no need to __module_get() and module_put(). */
+ .owner = THIS_MODULE,
+};
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 2020-01-27 10:57:18.178871751 +0100
-@@ -0,0 +1,589 @@
++++ linux/fs/aufs/super.h 2022-08-02 12:12:45.168975258 +0200
+@@ -0,0 +1,592 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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;
+/* ---------------------------------------------------------------------- */
+
+/* super.c */
-+extern struct file_system_type aufs_fs_type;
+struct inode *au_iget_locked(struct super_block *sb, ino_t ino);
++
+typedef unsigned long long (*au_arraycb_t)(struct super_block *sb, void *array,
+ unsigned long long max, void *arg);
+void *au_array_alloc(unsigned long long *hint, au_arraycb_t cb,
+struct inode **au_iarray_alloc(struct super_block *sb, unsigned long long *max);
+void au_iarray_free(struct inode **a, unsigned long long max);
+
++void au_remount_refresh(struct super_block *sb, unsigned int do_idop);
++extern const struct super_operations aufs_sop;
++int au_alloc_root(struct super_block *sb);
++extern struct file_system_type aufs_fs_type;
++
+/* sbinfo.c */
+void au_si_free(struct kobject *kobj);
-+int au_si_alloc(struct super_block *sb);
++struct au_sbinfo *au_si_alloc(struct super_block *sb);
+int au_sbr_realloc(struct au_sbinfo *sbinfo, int nbr, int may_shrink);
+
+unsigned int au_sigen_inc(struct super_block *sb);
+#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 2020-01-27 10:57:18.178871751 +0100
-@@ -0,0 +1,93 @@
++++ linux/fs/aufs/sysaufs.c 2022-08-02 12:12:45.168975258 +0200
+@@ -0,0 +1,94 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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
+ &sysaufs_si_attr_xi_path.attr,
+ NULL,
+};
++ATTRIBUTE_GROUPS(sysaufs_si);
+
+static const struct sysfs_ops au_sbi_ops = {
+ .show = sysaufs_si_show
+static struct kobj_type au_sbi_ktype = {
+ .release = au_si_free,
+ .sysfs_ops = &au_sbi_ops,
-+ .default_attrs = sysaufs_si_attrs
++ .default_groups = sysaufs_si_groups
+};
+
+/* ---------------------------------------------------------------------- */
+}
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 2020-01-27 10:57:18.178871751 +0100
++++ linux/fs/aufs/sysaufs.h 2022-08-02 12:12:45.168975258 +0200
@@ -0,0 +1,102 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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 2020-01-27 10:57:18.178871751 +0100
++++ linux/fs/aufs/sysfs.c 2022-08-02 12:12:45.168975258 +0200
@@ -0,0 +1,374 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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 2020-01-27 10:57:18.178871751 +0100
++++ linux/fs/aufs/sysrq.c 2022-08-02 12:12:45.168975258 +0200
@@ -0,0 +1,149 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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/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 2020-01-27 10:57:18.178871751 +0100
++++ linux/fs/aufs/vdir.c 2022-08-02 12:12:45.168975258 +0200
@@ -0,0 +1,896 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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/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 2020-08-03 09:14:46.095748745 +0200
-@@ -0,0 +1,895 @@
++++ linux/fs/aufs/vfsub.c 2022-08-02 12:12:45.168975258 +0200
+@@ -0,0 +1,918 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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
+ */
+
+#include <linux/mnt_namespace.h>
-+#include <linux/namei.h>
+#include <linux/nsproxy.h>
+#include <linux/security.h>
+#include <linux/splice.h>
+}
+#endif
+
-+int vfsub_sync_filesystem(struct super_block *h_sb, int wait)
++int vfsub_sync_filesystem(struct super_block *h_sb)
+{
+ int err;
+
+ lockdep_off();
+ down_read(&h_sb->s_umount);
-+ err = __sync_filesystem(h_sb, wait);
++ err = sync_filesystem(h_sb);
+ up_read(&h_sb->s_umount);
+ lockdep_on();
+
+ struct kstat st;
+ struct super_block *h_sb;
+
++ /*
++ * Always needs h_path->mnt for LSM or FUSE branch.
++ */
++ AuDebugOn(!h_path->mnt);
++
+ /* for remote fs, leave work for its getattr or d_revalidate */
+ /* for bad i_attr fs, handle them in aufs_getattr() */
+ /* still some fs may acquire i_mutex. we need to skip them */
+}
+
+struct dentry *vfsub_lookup_one_len_unlocked(const char *name,
-+ struct dentry *parent, int len)
++ struct path *ppath, int len)
+{
-+ struct path path = {
-+ .mnt = NULL
-+ };
++ struct path path;
+
-+ path.dentry = lookup_one_len_unlocked(name, parent, len);
++ path.dentry = lookup_one_len_unlocked(name, ppath->dentry, len);
+ if (IS_ERR(path.dentry))
+ goto out;
-+ if (d_is_positive(path.dentry))
++ if (d_is_positive(path.dentry)) {
++ path.mnt = ppath->mnt;
+ vfsub_update_h_iattr(&path, /*did*/NULL); /*ignore*/
++ }
+
+out:
+ AuTraceErrPtr(path.dentry);
+ return path.dentry;
+}
+
-+struct dentry *vfsub_lookup_one_len(const char *name, struct dentry *parent,
++struct dentry *vfsub_lookup_one_len(const char *name, struct path *ppath,
+ int len)
+{
-+ struct path path = {
-+ .mnt = NULL
-+ };
++ struct path path;
+
+ /* VFS checks it too, but by WARN_ON_ONCE() */
-+ IMustLock(d_inode(parent));
++ IMustLock(d_inode(ppath->dentry));
+
-+ path.dentry = lookup_one_len(name, parent, len);
++ path.dentry = lookup_one_len(name, ppath->dentry, len);
+ if (IS_ERR(path.dentry))
+ goto out;
-+ if (d_is_positive(path.dentry))
++ if (d_is_positive(path.dentry)) {
++ path.mnt = ppath->mnt;
+ vfsub_update_h_iattr(&path, /*did*/NULL); /*ignore*/
++ }
+
+out:
+ AuTraceErrPtr(path.dentry);
+void vfsub_call_lkup_one(void *args)
+{
+ struct vfsub_lkup_one_args *a = args;
-+ *a->errp = vfsub_lkup_one(a->name, a->parent);
++ *a->errp = vfsub_lkup_one(a->name, a->ppath);
+}
+
+/* ---------------------------------------------------------------------- */
+{
+ 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);
+ lockdep_off();
+ sb_start_write(h_sb);
+ lockdep_on();
-+ err = locks_verify_truncate(h_inode, h_file, length);
-+ if (!err)
-+ err = security_path_truncate(h_path);
++ 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 2020-01-27 10:57:18.178871751 +0100
-@@ -0,0 +1,354 @@
++++ linux/fs/aufs/vfsub.h 2022-08-02 12:12:45.168975258 +0200
+@@ -0,0 +1,358 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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
+AuStubInt0(vfsub_test_mntns, struct vfsmount *mnt, struct super_block *h_sb);
+#endif
+
-+int vfsub_sync_filesystem(struct super_block *h_sb, int wait);
++int vfsub_sync_filesystem(struct super_block *h_sb);
+
+/* ---------------------------------------------------------------------- */
+
+int vfsub_kern_path(const char *name, unsigned int flags, struct path *path);
+
+struct dentry *vfsub_lookup_one_len_unlocked(const char *name,
-+ struct dentry *parent, int len);
-+struct dentry *vfsub_lookup_one_len(const char *name, struct dentry *parent,
++ struct path *ppath, int len);
++struct dentry *vfsub_lookup_one_len(const char *name, struct path *ppath,
+ int len);
+
+struct vfsub_lkup_one_args {
+ struct dentry **errp;
+ struct qstr *name;
-+ struct dentry *parent;
++ struct path *ppath;
+};
+
+static inline struct dentry *vfsub_lkup_one(struct qstr *name,
-+ struct dentry *parent)
++ struct path *ppath)
+{
-+ return vfsub_lookup_one_len(name->name, parent, name->len);
++ return vfsub_lookup_one_len(name->name, ppath, name->len);
+}
+
+void vfsub_call_lkup_one(void *args);
+static inline int vfsub_update_time(struct inode *h_inode,
+ struct timespec64 *ts, int flags)
+{
-+ return update_time(h_inode, ts, flags);
++ return inode_update_time(h_inode, ts, flags);
+ /* no vfsub_update_h_iattr() since we don't have struct path */
+}
+
+#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 2020-01-27 10:57:18.178871751 +0100
++++ linux/fs/aufs/wbr_policy.c 2022-08-02 12:12:45.168975258 +0200
@@ -0,0 +1,830 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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 2020-01-27 10:57:18.178871751 +0100
-@@ -0,0 +1,1062 @@
++++ linux/fs/aufs/whout.c 2022-08-02 12:12:45.168975258 +0200
+@@ -0,0 +1,1072 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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.
++ * test if the @wh_name exists under @h_ppath.
+ * @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 path *h_ppath,
++ 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);
++ wh_dentry = vfsub_lkup_one(wh_name, h_ppath);
+ else
-+ wh_dentry = au_sio_lkup_one(wh_name, h_parent);
++ wh_dentry = au_sio_lkup_one(h_userns, wh_name, h_ppath);
+ err = PTR_ERR(wh_dentry);
+ if (IS_ERR(wh_dentry)) {
+ if (err == -ENAMETOOLONG)
+}
+
+/*
-+ * test if the @h_dentry sets opaque or not.
++ * test if the @h_path->dentry sets opaque or not.
+ */
-+int au_diropq_test(struct dentry *h_dentry)
++int au_diropq_test(struct user_namespace *h_userns, struct path *h_path)
+{
+ 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));
++ h_dir = d_inode(h_path->dentry);
++ err = au_wh_test(h_userns, h_path, &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 path h_ppath;
++ 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_ppath.dentry = h_parent;
++ h_ppath.mnt = au_br_mnt(br);
++ 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_ppath);
+ if (IS_ERR(dentry) || d_is_negative(dentry))
+ goto out_name;
+ dput(dentry);
+ return err;
+}
+
-+static int unlink_wh_name(struct dentry *h_parent, struct qstr *wh,
-+ struct au_branch *br)
++static int unlink_wh_name(struct path *h_ppath, struct qstr *wh)
+{
+ int err;
-+ struct path h_path = {
-+ .mnt = au_br_mnt(br)
-+ };
++ struct path h_path;
+
+ err = 0;
-+ h_path.dentry = vfsub_lkup_one(wh, h_parent);
++ h_path.dentry = vfsub_lkup_one(wh, h_ppath);
+ if (IS_ERR(h_path.dentry))
+ err = PTR_ERR(h_path.dentry);
+ else {
-+ if (d_is_reg(h_path.dentry))
-+ err = do_unlink_wh(d_inode(h_parent), &h_path);
++ if (d_is_reg(h_path.dentry)) {
++ h_path.mnt = h_ppath->mnt;
++ err = do_unlink_wh(d_inode(h_ppath->dentry), &h_path);
++ }
+ dput(h_path.dentry);
+ }
+
+static struct dentry *do_diropq(struct dentry *dentry, aufs_bindex_t bindex,
+ unsigned int flags)
+{
-+ struct dentry *opq_dentry, *h_dentry;
++ struct dentry *opq_dentry;
+ struct super_block *sb;
+ struct au_branch *br;
++ struct path h_path;
+ int err;
+
+ sb = dentry->d_sb;
+ br = au_sbr(sb, bindex);
-+ h_dentry = au_h_dptr(dentry, bindex);
-+ opq_dentry = vfsub_lkup_one(&diropq_name, h_dentry);
++ h_path.dentry = au_h_dptr(dentry, bindex);
++ h_path.mnt = au_br_mnt(br);
++ opq_dentry = vfsub_lkup_one(&diropq_name, &h_path);
+ if (IS_ERR(opq_dentry))
+ goto out;
+
+ goto out; /* success */
+ }
+ } else {
-+ struct path tmp = {
-+ .dentry = opq_dentry,
-+ .mnt = au_br_mnt(br)
-+ };
-+ err = do_unlink_wh(au_h_iptr(d_inode(dentry), bindex), &tmp);
++ h_path.dentry = opq_dentry;
++ err = do_unlink_wh(au_h_iptr(d_inode(dentry), bindex), &h_path);
+ if (!err)
+ au_set_dbdiropq(dentry, -1);
+ }
+ 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;
+ int err;
+ struct qstr wh_name;
+ struct dentry *wh_dentry;
++ struct path h_path;
+
+ err = au_wh_name_alloc(&wh_name, base_name);
+ wh_dentry = ERR_PTR(err);
+ if (!err) {
-+ wh_dentry = vfsub_lkup_one(&wh_name, h_parent);
++ h_path.dentry = h_parent;
++ h_path.mnt = au_br_mnt(br);
++ wh_dentry = vfsub_lkup_one(&wh_name, &h_path);
+ au_kfree_try_rcu(wh_name.name);
+ }
+ return wh_dentry;
+/* ---------------------------------------------------------------------- */
+
+/* Delete all whiteouts in this directory on branch bindex. */
-+static int del_wh_children(struct dentry *h_dentry, struct au_nhash *whlist,
-+ aufs_bindex_t bindex, struct au_branch *br)
++static int del_wh_children(struct path *h_path, struct au_nhash *whlist,
++ aufs_bindex_t bindex)
+{
+ int err;
+ unsigned long ul, n;
+ if (str->len + AUFS_WH_PFX_LEN <= PATH_MAX) {
+ memcpy(p, str->name, str->len);
+ wh_name.len = AUFS_WH_PFX_LEN + str->len;
-+ err = unlink_wh_name(h_dentry, &wh_name, br);
++ err = unlink_wh_name(h_path, &wh_name);
+ if (!err)
+ continue;
+ break;
+
+struct del_wh_children_args {
+ int *errp;
-+ struct dentry *h_dentry;
++ struct path *h_path;
+ struct au_nhash *whlist;
+ aufs_bindex_t bindex;
-+ struct au_branch *br;
+};
+
+static void call_del_wh_children(void *args)
+{
+ struct del_wh_children_args *a = args;
-+ *a->errp = del_wh_children(a->h_dentry, a->whlist, a->bindex, a->br);
++ *a->errp = del_wh_children(a->h_path, a->whlist, a->bindex);
+}
+
+/* ---------------------------------------------------------------------- */
+{
+ int err;
+ unsigned int h_nlink;
-+ struct path h_tmp;
++ struct path wh_path;
+ 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);
++ wh_path.dentry = wh_dentry;
++ wh_path.mnt = au_br_mnt(br);
++ 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))
-+ err = del_wh_children(wh_dentry, whlist, bindex, br);
++ if (!au_test_h_perm_sio(h_userns, wh_inode, MAY_EXEC | MAY_WRITE))
++ err = del_wh_children(&wh_path, whlist, bindex);
+ else {
+ int wkq_err;
+ struct del_wh_children_args args = {
+ .errp = &err,
-+ .h_dentry = wh_dentry,
++ .h_path = &wh_path,
+ .whlist = whlist,
-+ .bindex = bindex,
-+ .br = br
++ .bindex = bindex
+ };
+
+ wkq_err = au_wkq_wait(call_del_wh_children, &args);
+ inode_unlock(wh_inode);
+
+ if (!err) {
-+ h_tmp.dentry = wh_dentry;
-+ h_tmp.mnt = au_br_mnt(br);
+ h_nlink = h_dir->i_nlink;
-+ err = vfsub_rmdir(h_dir, &h_tmp);
++ err = vfsub_rmdir(h_dir, &wh_path);
+ /* some fs doesn't change the parent nlink in some cases */
+ h_nlink -= h_dir->i_nlink;
+ }
+}
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 2020-01-27 10:57:18.178871751 +0100
-@@ -0,0 +1,86 @@
++++ linux/fs/aufs/whout.h 2022-08-02 12:12:45.168975258 +0200
+@@ -0,0 +1,87 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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 path *h_ppath,
++ struct qstr *wh_name, int try_sio);
++int au_diropq_test(struct user_namespace *h_userns, struct path *h_path);
+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 2020-08-03 09:12:33.764880472 +0200
++++ linux/fs/aufs/wkq.c 2022-08-02 12:12:45.168975258 +0200
@@ -0,0 +1,372 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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/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 2020-01-27 10:57:18.182205184 +0100
++++ linux/fs/aufs/wkq.h 2022-08-02 12:12:45.168975258 +0200
@@ -0,0 +1,89 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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 2020-08-03 09:14:46.095748745 +0200
-@@ -0,0 +1,356 @@
++++ linux/fs/aufs/xattr.c 2022-08-02 12:12:45.168975258 +0200
+@@ -0,0 +1,368 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2014-2020 Junjiro R. Okajima
++ * Copyright (C) 2014-2021 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;
+ 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;
+}
+
+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 2020-04-03 08:16:49.834195677 +0200
-@@ -0,0 +1,1966 @@
++++ linux/fs/aufs/xino.c 2022-08-02 12:12:45.168975258 +0200
+@@ -0,0 +1,1926 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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 = -EINVAL;
-+ if (unlikely(sb == d->d_sb)) {
++ if (unlikely(sb && sb == d->d_sb)) {
+ if (!silent)
+ pr_err("%s must be outside\n", fpath);
+ goto out;
+ struct file *copy_src)
+{
+ struct file *file;
-+ struct dentry *dentry, *parent;
++ struct dentry *dentry;
+ struct inode *dir, *delegated;
+ struct qstr *name;
-+ struct path path;
++ struct path ppath, path;
+ int err, do_unlock;
+ struct au_xino_lock_dir ldir;
+
+ do_unlock = 1;
+ au_xino_lock_dir(sb, base, &ldir);
+ dentry = base->dentry;
-+ parent = dentry->d_parent; /* dir inode is locked */
-+ dir = d_inode(parent);
++ ppath.dentry = dentry->d_parent; /* dir inode is locked */
++ ppath.mnt = base->mnt;
++ dir = d_inode(ppath.dentry);
+ IMustLock(dir);
+
+ name = &dentry->d_name;
-+ path.dentry = vfsub_lookup_one_len(name->name, parent, name->len);
++ path.dentry = vfsub_lookup_one_len(name->name, &ppath, name->len);
+ if (IS_ERR(path.dentry)) {
+ file = (void *)path.dentry;
+ pr_err("%pd lookup err %ld\n", dentry, PTR_ERR(path.dentry));
+ }
+
+ /* 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);
+ 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 2020-08-03 09:14:46.095748745 +0200
++++ linux/include/uapi/linux/aufs_type.h 2022-08-02 12:12:45.168975258 +0200
@@ -0,0 +1,452 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
-+ * Copyright (C) 2005-2020 Junjiro R. Okajima
++ * Copyright (C) 2005-2021 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
+#include <limits.h>
+#endif /* __KERNEL__ */
+
-+#define AUFS_VERSION "5.x-rcN-20200622"
++#define AUFS_VERSION "5.x-rcN-20220711"
+
+/* todo? move this to linux-2.6.19/include/magic.h */
+#define AUFS_SUPER_MAGIC ('a' << 24 | 'u' << 16 | 'f' << 8 | 's')
aufs5.x-rcN loopback patch
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
-index 0479902a0cd50..758c8ee4d4e6b 100644
+index a705173cf452..642a93f4fdee 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
-@@ -638,6 +638,15 @@ static inline void loop_update_dio(struct loop_device *lo)
- lo->use_dio);
+@@ -54,7 +54,7 @@ struct loop_device {
+ int lo_flags;
+ char lo_file_name[LO_NAME_SIZE];
+
+- struct file * lo_backing_file;
++ struct file *lo_backing_file, *lo_backing_virt_file;
+ struct block_device *lo_device;
+
+ gfp_t old_gfp_mask;
+@@ -510,6 +510,15 @@ static inline void loop_update_dio(struct loop_device *lo)
+ lo->use_dio);
}
+static struct file *loop_real_file(struct file *file)
+ return f;
+}
+
- static void loop_reread_partitions(struct loop_device *lo,
- struct block_device *bdev)
+ static void loop_reread_partitions(struct loop_device *lo)
{
-@@ -693,6 +702,7 @@ static int loop_change_fd(struct loop_device *lo, struct block_device *bdev,
- unsigned int arg)
+ int rc;
+@@ -567,6 +576,7 @@ static int loop_change_fd(struct loop_device *lo, struct block_device *bdev,
{
- struct file *file = NULL, *old_file;
-+ struct file *f, *virt_file = NULL, *old_virt_file;
- int error;
- bool partscan;
-
-@@ -712,12 +722,19 @@ static int loop_change_fd(struct loop_device *lo, struct block_device *bdev,
- file = fget(arg);
- if (!file)
+ struct file *file = fget(arg);
+ struct file *old_file;
++ struct file *f, *virt_file = NULL, *old_virt_file;
+ int error;
+ bool partscan;
+ bool is_loop;
+@@ -590,11 +600,19 @@ static int loop_change_fd(struct loop_device *lo, struct block_device *bdev,
+ if (!(lo->lo_flags & LO_FLAGS_READ_ONLY))
goto out_err;
+
+ f = loop_real_file(file);
+ if (f) {
+ virt_file = file;
+ file = f;
+ get_file(file);
+ }
-
++
error = loop_validate_file(file, bdev);
if (error)
goto out_err;
error = -EINVAL;
-@@ -729,6 +746,7 @@ static int loop_change_fd(struct loop_device *lo, struct block_device *bdev,
+@@ -607,6 +625,7 @@ 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));
-@@ -742,6 +760,8 @@ static int loop_change_fd(struct loop_device *lo, struct block_device *bdev,
+@@ -629,6 +648,8 @@ static int loop_change_fd(struct loop_device *lo, struct block_device *bdev,
* dependency.
*/
fput(old_file);
+ if (old_virt_file)
+ fput(old_virt_file);
if (partscan)
- loop_reread_partitions(lo, bdev);
- return 0;
-@@ -750,6 +770,8 @@ static int loop_change_fd(struct loop_device *lo, struct block_device *bdev,
- mutex_unlock(&loop_ctl_mutex);
- if (file)
- fput(file);
+ loop_reread_partitions(lo);
+
+@@ -642,6 +663,8 @@ static int loop_change_fd(struct loop_device *lo, struct block_device *bdev,
+ loop_global_unlock(lo, is_loop);
+ out_putf:
+ fput(file);
+ if (virt_file)
+ fput(virt_file);
- return error;
+ goto done;
}
-@@ -973,7 +995,7 @@ static int loop_configure(struct loop_device *lo, fmode_t mode
- struct block_device *bdev,
+@@ -1008,6 +1031,7 @@ static int loop_configure(struct loop_device *lo, fmode_t mode,
const struct loop_config *config)
{
-- struct file *file;
-+ struct file *file, *f, *virt_file = NULL;
- struct inode *inode;
+ struct file *file = fget(config->fd);
++ struct file *f, *virt_file = NULL;
+ struct inode *inode;
struct address_space *mapping;
- struct block_device *claimed_bdev = NULL;
-@@ -989,6 +1011,12 @@ static int loop_configure(struct loop_device *lo, fmode_t mode,
- file = fget(arg);
- if (!file)
- goto out;
+ int error;
+@@ -1026,6 +1050,13 @@ static int loop_configure(struct loop_device *lo, fmode_t mode,
+ /* suppress uevents while reconfiguring the device */
+ dev_set_uevent_suppress(disk_to_dev(lo->lo_disk), 1);
+
+ f = loop_real_file(file);
+ if (f) {
+ virt_file = file;
+ file = f;
+ get_file(file);
+ }
-
++
/*
* If we don't hold exclusive handle for the device, upgrade to it
-@@ -1037,6 +1065,7 @@ static int loop_configure(struct loop_device *lo, fmode_t mode
+ * here to avoid changing device under exclusive owner.
+@@ -1086,6 +1117,7 @@ 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_backing_file = file;
lo->old_gfp_mask = mapping_gfp_mask(mapping);
mapping_set_gfp_mask(mapping, lo->old_gfp_mask & ~(__GFP_IO|__GFP_FS));
-@@ -1090,6 +1119,8 @@ static int loop_configure(struct loop_device *lo, fmode_t mode
- bd_abort_claiming(bdev, claimed_bdev, loop_set_fd);
+@@ -1141,6 +1173,8 @@ static int loop_configure(struct loop_device *lo, fmode_t mode,
+ bd_abort_claiming(bdev, loop_configure);
out_putf:
fput(file);
+ if (virt_file)
+ fput(virt_file);
- out:
/* This is safe: open() is still holding a reference. */
module_put(THIS_MODULE);
-@@ -1136,6 +1167,7 @@ loop_init_xfer(struct loop_device *lo, struct loop_func_table *xfer,
- static int __loop_clr_fd(struct loop_device *lo, bool release)
+ goto done;
+@@ -1149,6 +1183,7 @@ static int loop_configure(struct loop_device *lo, fmode_t mode,
+ static void __loop_clr_fd(struct loop_device *lo, bool release)
{
- struct file *filp = NULL;
+ struct file *filp;
+ struct file *virt_filp = lo->lo_backing_virt_file;
gfp_t gfp = lo->old_gfp_mask;
- struct block_device *bdev = lo->lo_device;
- int err = 0;
-@@ -1159,6 +1191,7 @@ static int __loop_clr_fd(struct loop_device *lo, bool release)
+ if (test_bit(QUEUE_FLAG_WC, &lo->lo_queue->queue_flags))
+@@ -1165,6 +1200,7 @@ static void __loop_clr_fd(struct loop_device *lo, bool release)
spin_lock_irq(&lo->lo_lock);
+ filp = lo->lo_backing_file;
lo->lo_backing_file = NULL;
+ lo->lo_backing_virt_file = NULL;
spin_unlock_irq(&lo->lo_lock);
- loop_release_xfer(lo);
-@@ -1242,6 +1275,8 @@ static int __loop_clr_fd(struct loop_device *lo, bool release)
+ lo->lo_device = NULL;
+@@ -1227,6 +1263,8 @@ static void __loop_clr_fd(struct loop_device *lo, bool release)
+ * fput can take open_mutex which is usually taken before lo_mutex.
*/
- if (filp)
- fput(filp);
+ fput(filp);
+ if (virt_filp)
+ fput(virt_filp);
- return err;
}
-diff --git a/drivers/block/loop.h b/drivers/block/loop.h
-index af75a5ee40944..1d847cb194ff6 100644
---- a/drivers/block/loop.h
-+++ b/drivers/block/loop.h
-@@ -46,7 +46,7 @@ struct loop_device {
- int (*ioctl)(struct loop_device *, int cmd,
- unsigned long arg);
-
-- struct file * lo_backing_file;
-+ struct file *lo_backing_file, *lo_backing_virt_file;
- struct block_device *lo_device;
- void *key_data;
-
+ static int loop_clr_fd(struct loop_device *lo)
diff --git a/fs/aufs/f_op.c b/fs/aufs/f_op.c
-index 6fb4a4ed8cc7f..ba9a959f2db27 100644
+index 99ceca144044..e49dfe855032 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 a8b63acc62045..9d97c3af5686a 100644
+index 74347bd75b38..5ef888a1d53f 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 94f4f80ae33bf..ca1194354aff4 100644
+index 7293bee427f9..3345c098d0d4 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 589dd01220201..801e0a7faec59 100644
+index 7d9bcc074c87..0eefe350c01c 100644
--- a/fs/aufs/super.c
+++ b/fs/aufs/super.c
-@@ -844,7 +844,10 @@ static const struct super_operations aufs_sop = {
+@@ -758,7 +758,10 @@ const struct super_operations aufs_sop = {
+ .show_options = aufs_show_options,
.statfs = aufs_statfs,
.put_super = aufs_put_super,
- .sync_fs = aufs_sync_fs,
-- .remount_fs = aufs_remount_fs
-+ .remount_fs = aufs_remount_fs,
+- .sync_fs = aufs_sync_fs
++ .sync_fs = aufs_sync_fs,
+#ifdef CONFIG_AUFS_BDEV_LOOP
+ .real_loop = aufs_real_loop
+#endif
/* ---------------------------------------------------------------------- */
diff --git a/include/linux/fs.h b/include/linux/fs.h
-index 916efd7e612b3..68f536f42b2a0 100644
+index f5aed17b2ce2..6b2d2256be5f 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
-@@ -1985,6 +1985,10 @@ struct super_operations {
+@@ -2121,6 +2121,10 @@ struct super_operations {
struct shrink_control *);
long (*free_cached_objects)(struct super_block *,
struct shrink_control *);
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