SPDX-License-Identifier: GPL-2.0
aufs4.x-rcN kbuild patch
-diff --git a/fs/Kconfig b/fs/Kconfig
-index ac474a6..284cee9 100644
---- a/fs/Kconfig
-+++ b/fs/Kconfig
-@@ -255,6 +255,7 @@ source "fs/pstore/Kconfig"
+--- linux-5.2/fs/Kconfig~ 2019-07-08 00:41:56.000000000 +0200
++++ linux-5.2/fs/Kconfig 2019-07-08 09:33:44.244881357 +0200
+@@ -261,6 +261,7 @@ source "fs/romfs/Kconfig"
+ source "fs/pstore/Kconfig"
source "fs/sysv/Kconfig"
source "fs/ufs/Kconfig"
- source "fs/exofs/Kconfig"
+source "fs/aufs/Kconfig"
endif # MISC_FILESYSTEMS
diff --git a/fs/Makefile b/fs/Makefile
-index 293733f..12d19d0 100644
+index 293733f61594..12d19d0de07a 100644
--- a/fs/Makefile
+++ b/fs/Makefile
@@ -128,3 +128,4 @@ obj-y += exofs/ # Multiple modules
aufs4.x-rcN base patch
diff --git a/MAINTAINERS b/MAINTAINERS
-index 6ac000c..16404bb 100644
+index dce5c099f43c..d10f05c88860 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
-@@ -2605,6 +2605,19 @@ F: include/linux/audit.h
+@@ -2635,6 +2635,19 @@ F: include/linux/audit.h
F: include/uapi/linux/audit.h
F: kernel/audit*
+AUFS (advanced multi layered unification filesystem) FILESYSTEM
+M: "J. R. Okajima" <hooanon05g@gmail.com>
-+L: linux-unionfs@vger.kernel.org
+L: aufs-users@lists.sourceforge.net (members only)
++L: linux-unionfs@vger.kernel.org
+W: http://aufs.sourceforge.net
+T: git://github.com/sfjro/aufs4-linux.git
+S: Supported
M: Miguel Ojeda Sandonis <miguel.ojeda.sandonis@gmail.com>
S: Maintained
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
-index ea9debf..9e534a3 100644
+index cf5538942834..a271e17e4b10 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
-@@ -739,6 +739,24 @@ static int loop_change_fd(struct loop_device *lo, struct block_device *bdev,
+@@ -738,6 +738,24 @@ static int loop_change_fd(struct loop_device *lo, struct block_device *bdev,
return error;
}
static ssize_t loop_attr_show(struct device *dev, char *page,
diff --git a/fs/dcache.c b/fs/dcache.c
-index 2e7e8d8..9f57bd8 100644
+index aac41adf4743..fc18967c2522 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
-@@ -1238,7 +1238,7 @@ enum d_walk_ret {
+@@ -1247,7 +1247,7 @@ 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 4137d96..c91b3e3 100644
+index 083185174c6d..78234ee16784 100644
--- a/fs/fcntl.c
+++ b/fs/fcntl.c
@@ -32,7 +32,7 @@
return error;
diff --git a/fs/inode.c b/fs/inode.c
-index 42f6d25..fa6ae6a 100644
+index 73432e64f874..4a1756b8b4bd 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -1657,7 +1657,7 @@ EXPORT_SYMBOL(generic_update_time);
int (*update_time)(struct inode *, struct timespec64 *, int);
diff --git a/fs/namespace.c b/fs/namespace.c
-index 9918655..72c93f3 100644
+index 678ef175d63a..9b6a3d0f87a1 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
-@@ -770,6 +770,12 @@ static inline int check_mnt(struct mount *mnt)
+@@ -768,6 +768,12 @@ 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 8a2737f..42f64cc 100644
+index ff3c5e6f87cf..5c18a9e51f37 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -489,6 +489,28 @@ ssize_t __vfs_write(struct file *file, const char __user *p, size_t count,
{
mm_segment_t old_fs;
diff --git a/fs/splice.c b/fs/splice.c
-index b3daa97..1dd7f96 100644
+index de2ede048473..5dcf77b8e1b2 100644
--- a/fs/splice.c
+++ b/fs/splice.c
-@@ -838,8 +838,8 @@ EXPORT_SYMBOL(generic_splice_sendpage);
+@@ -837,8 +837,8 @@ EXPORT_SYMBOL(generic_splice_sendpage);
/*
* Attempt to initiate a splice from pipe to file.
*/
{
ssize_t (*splice_write)(struct pipe_inode_info *, struct file *,
loff_t *, size_t, unsigned int);
-@@ -855,9 +855,9 @@ static long do_splice_from(struct pipe_inode_info *pipe, struct file *out,
+@@ -854,9 +854,9 @@ static long do_splice_from(struct pipe_inode_info *pipe, struct file *out,
/*
* Attempt to initiate a splice from a file to a pipe.
*/
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 b54e054..2860782 100644
+index b54e0541ad89..28607828e96f 100644
--- a/fs/sync.c
+++ b/fs/sync.c
@@ -28,7 +28,7 @@
if (wait)
sync_inodes_sb(sb);
diff --git a/include/linux/fs.h b/include/linux/fs.h
-index 897eae8..7fb92a9 100644
+index 29d8e2cfed0e..5db265e7d35a 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
-@@ -1286,6 +1286,7 @@ extern void fasync_free(struct fasync_struct *);
+@@ -1310,6 +1310,7 @@ 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);
-@@ -1747,6 +1748,7 @@ struct file_operations {
+@@ -1803,6 +1804,7 @@ 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);
-@@ -1818,6 +1820,12 @@ ssize_t rw_copy_check_uvector(int type, const struct iovec __user * uvector,
+@@ -1873,6 +1875,12 @@ ssize_t rw_copy_check_uvector(int type, const struct iovec __user * uvector,
struct iovec *fast_pointer,
struct iovec **ret_pointer);
extern ssize_t __vfs_read(struct file *, char __user *, size_t, loff_t *);
extern ssize_t vfs_read(struct file *, char __user *, size_t, loff_t *);
extern ssize_t vfs_write(struct file *, const char __user *, size_t, loff_t *);
-@@ -2243,6 +2251,7 @@ extern int current_umask(void);
+@@ -2298,6 +2306,7 @@ 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;
-@@ -2530,6 +2539,7 @@ static inline bool sb_is_blkdev_sb(struct super_block *sb)
+@@ -2585,6 +2594,7 @@ static inline bool sb_is_blkdev_sb(struct super_block *sb)
return false;
}
#endif
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 b0d0b51..f73ffaa 100644
+index c5335df2372f..4e48a5059536 100644
--- a/include/linux/lockdep.h
+++ b/include/linux/lockdep.h
-@@ -313,6 +313,8 @@ static inline int lockdep_match_key(struct lockdep_map *lock,
+@@ -306,6 +306,8 @@ static inline int lockdep_match_key(struct lockdep_map *lock,
return lock->key == key;
}
/*
* Acquire a lock.
*
-@@ -439,6 +441,7 @@ struct lockdep_map { };
+@@ -432,6 +434,7 @@ struct lockdep_map { };
#define lockdep_depth(tsk) (0)
#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 3594208..24f5fd1 100644
+index 35942084cd40..24f5fd1a789d 100644
--- a/include/linux/mnt_namespace.h
+++ b/include/linux/mnt_namespace.h
@@ -6,11 +6,14 @@
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 74b4911..19789fb 100644
+index 74b4911ac16d..19789fbea567 100644
--- a/include/linux/splice.h
+++ b/include/linux/splice.h
@@ -87,4 +87,10 @@ extern void splice_shrink_spd(struct splice_pipe_desc *);
+ unsigned int flags);
#endif
diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c
-index dd13f86..fa6f559 100644
+index 95932333a48b..516ab7da26fb 100644
--- a/kernel/locking/lockdep.c
+++ b/kernel/locking/lockdep.c
-@@ -140,7 +140,7 @@ static struct lock_list list_entries[MAX_LOCKDEP_ENTRIES];
- unsigned long nr_lock_classes;
- static struct lock_class lock_classes[MAX_LOCKDEP_KEYS];
+@@ -143,7 +143,7 @@ static
+ #endif
+ struct lock_class lock_classes[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)
{
if (!hlock->class_idx) {
/*
-@@ -151,6 +151,7 @@ static inline struct lock_class *hlock_class(struct held_lock *hlock)
+@@ -154,6 +154,7 @@ static inline struct lock_class *hlock_class(struct held_lock *hlock)
}
return lock_classes + hlock->class_idx - 1;
}
aufs4.x-rcN mmap patch
diff --git a/fs/proc/base.c b/fs/proc/base.c
-index 7e9f07bf..3ab5901 100644
+index f5ed9512d193..e8f8e59d93bb 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
-@@ -2016,7 +2016,7 @@ static int map_files_get_link(struct dentry *dentry, struct path *path)
+@@ -2014,7 +2014,7 @@ static int map_files_get_link(struct dentry *dentry, struct path *path)
down_read(&mm->mmap_sem);
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 3b63be6..fb9913b 100644
+index 3b63be64e436..fb9913bf3d10 100644
--- a/fs/proc/nommu.c
+++ b/fs/proc/nommu.c
@@ -45,7 +45,10 @@ static int nommu_region_show(struct seq_file *m, struct vm_region *region)
ino = inode->i_ino;
}
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
-index 5ea1d64..7865a470 100644
+index 85b0ef890b28..0f7fb8138160 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -305,7 +305,10 @@ show_map_vma(struct seq_file *m, struct vm_area_struct *vma)
dev = inode->i_sb->s_dev;
ino = inode->i_ino;
pgoff = ((loff_t)vma->vm_pgoff) << PAGE_SHIFT;
-@@ -1727,7 +1730,7 @@ static int show_numa_map(struct seq_file *m, void *v)
+@@ -1740,7 +1743,7 @@ 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 mm_walk walk = {
.hugetlb_entry = gather_hugetlb_stats,
diff --git a/fs/proc/task_nommu.c b/fs/proc/task_nommu.c
-index 0b63d68..400d1c5 100644
+index 0b63d68dedb2..400d1c594ceb 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 0416a72..4a298a9 100644
+index 80bb6408fe73..59a1ea611ba7 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
-@@ -1440,6 +1440,28 @@ static inline void unmap_shared_mapping_range(struct address_space *mapping,
+@@ -1518,6 +1518,28 @@ static inline void unmap_shared_mapping_range(struct address_space *mapping,
unmap_mapping_range(mapping, holebegin, holelen, 0);
}
void *buf, int len, unsigned int gup_flags);
extern int access_remote_vm(struct mm_struct *mm, unsigned long addr,
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
-index 5ed8f62..0122975 100644
+index 2c471a2c43fa..c6e7aa6996ff 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
-@@ -239,6 +239,7 @@ struct vm_region {
+@@ -244,6 +244,7 @@ struct vm_region {
unsigned long vm_top; /* region allocated to here */
unsigned long vm_pgoff; /* the offset in vm_file corresponding to vm_start */
struct file *vm_file; /* the backing file or NULL */
int vm_usage; /* region usage count (access under nommu_region_sem) */
bool vm_icache_flushed : 1; /* true if the icache has been flushed for
-@@ -313,6 +314,7 @@ struct vm_area_struct {
+@@ -318,6 +319,7 @@ struct vm_area_struct {
unsigned long vm_pgoff; /* Offset (within vm_file) in PAGE_SIZE
units */
struct file * vm_file; /* File we map to (can be NULL). */
atomic_long_t swap_readahead_info;
diff --git a/kernel/fork.c b/kernel/fork.c
-index f0b5847..fa562c3 100644
+index b69248e6f0e0..099b89978dd3 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
-@@ -505,7 +505,7 @@ static __latent_entropy int dup_mmap(struct mm_struct *mm,
+@@ -547,7 +547,7 @@ static __latent_entropy int dup_mmap(struct mm_struct *mm,
struct inode *inode = file_inode(file);
struct address_space *mapping = file->f_mapping;
atomic_dec(&inode->i_writecount);
i_mmap_lock_write(mapping);
diff --git a/mm/Makefile b/mm/Makefile
-index 26ef77a..b2869af 100644
+index d210cc9d6f80..e77e80ce7298 100644
--- a/mm/Makefile
+++ b/mm/Makefile
@@ -39,7 +39,7 @@ obj-y := filemap.o mempool.o oom_kill.o fadvise.o \
+ prfile.o debug.o $(mmu-y)
obj-y += init-mm.o
-
+ obj-y += memblock.o
diff --git a/mm/filemap.c b/mm/filemap.c
-index 52517f2..250f675 100644
+index 9f5e323e883e..90db684a7cf4 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
-@@ -2700,7 +2700,7 @@ vm_fault_t filemap_page_mkwrite(struct vm_fault *vmf)
+@@ -2677,7 +2677,7 @@ vm_fault_t filemap_page_mkwrite(struct vm_fault *vmf)
vm_fault_t ret = VM_FAULT_LOCKED;
sb_start_pagefault(inode->i_sb);
if (page->mapping != inode->i_mapping) {
unlock_page(page);
diff --git a/mm/mmap.c b/mm/mmap.c
-index f7cd9cb..515e88a 100644
+index fc1809b1bed6..8f62e47a60ea 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -180,7 +180,7 @@ static struct vm_area_struct *remove_vma(struct vm_area_struct *vma)
mpol_put(vma_policy(vma));
vm_area_free(vma);
return next;
-@@ -905,7 +905,7 @@ int __vma_adjust(struct vm_area_struct *vma, unsigned long start,
+@@ -929,7 +929,7 @@ 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);
-@@ -1821,8 +1821,8 @@ unsigned long mmap_region(struct file *file, unsigned long addr,
+@@ -1845,8 +1845,8 @@ unsigned long mmap_region(struct file *file, unsigned long addr,
return addr;
unmap_and_free_vma:
/* Undo any partial mapping done by a device driver. */
unmap_region(mm, vma, prev, vma->vm_start, vma->vm_end);
-@@ -2641,7 +2641,7 @@ int __split_vma(struct mm_struct *mm, struct vm_area_struct *vma,
+@@ -2675,7 +2675,7 @@ 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);
-@@ -2660,7 +2660,7 @@ int __split_vma(struct mm_struct *mm, struct vm_area_struct *vma,
+@@ -2694,7 +2694,7 @@ 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));
-@@ -2822,7 +2822,7 @@ SYSCALL_DEFINE5(remap_file_pages, unsigned long, start, unsigned long, size,
+@@ -2884,7 +2884,7 @@ SYSCALL_DEFINE5(remap_file_pages, unsigned long, start, unsigned long, size,
struct vm_area_struct *vma;
unsigned long populate = 0;
unsigned long ret = -EINVAL;
pr_warn_once("%s (%d) uses deprecated remap_file_pages() syscall. See Documentation/vm/remap_file_pages.rst.\n",
current->comm, current->pid);
-@@ -2897,10 +2897,27 @@ SYSCALL_DEFINE5(remap_file_pages, unsigned long, start, unsigned long, size,
+@@ -2959,10 +2959,27 @@ SYSCALL_DEFINE5(remap_file_pages, unsigned long, start, unsigned long, size,
}
}
out:
up_write(&mm->mmap_sem);
if (populate)
-@@ -3206,7 +3223,7 @@ struct vm_area_struct *copy_vma(struct vm_area_struct **vmap,
+@@ -3252,7 +3269,7 @@ 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 e4aac33..b27b200 100644
+index 749276beb109..c7957f06fbc4 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -625,7 +625,7 @@ static void __put_nommu_region(struct vm_region *region)
kmem_cache_free(vm_region_jar, region);
region = pregion;
result = start;
-@@ -1361,7 +1361,7 @@ unsigned long do_mmap(struct file *file,
+@@ -1361,10 +1361,10 @@ unsigned long do_mmap(struct file *file,
up_write(&nommu_region_sem);
error:
if (region->vm_file)
+ vmr_fput(region);
kmem_cache_free(vm_region_jar, region);
if (vma->vm_file)
- fput(vma->vm_file);
+- fput(vma->vm_file);
++ vma_fput(vma);
+ vm_area_free(vma);
+ return ret;
+
diff --git a/mm/prfile.c b/mm/prfile.c
new file mode 100644
-index 0000000..a27ac36
+index 000000000000..024cdcfae1b1
--- /dev/null
+++ b/mm/prfile.c
@@ -0,0 +1,86 @@
+ *
+ * See Documentation/filesystems/aufs/design/06mmap.txt
+ *
-+ * Copyright (c) 2014-2018 Junjro R. Okajima
++ * Copyright (c) 2014-2019 Junjro R. Okajima
+ * Copyright (c) 2014 Ian Campbell
+ */
+
aufs4.x-rcN standalone patch
diff --git a/fs/dcache.c b/fs/dcache.c
-index 9f57bd8..328a136 100644
+index fc18967c2522..50eb587c1253 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
-@@ -1343,6 +1343,7 @@ void d_walk(struct dentry *parent, void *data,
+@@ -1352,6 +1352,7 @@ void d_walk(struct dentry *parent, void *data,
seq = 1;
goto again;
}
struct check_mount {
struct vfsmount *mnt;
-@@ -2837,6 +2838,7 @@ void d_exchange(struct dentry *dentry1, struct dentry *dentry2)
+@@ -2845,6 +2846,7 @@ 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 1ebf6e5..a72c294 100644
+index fb72d36f7823..7ce68004cbf8 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -109,6 +109,7 @@ bool path_noexec(const struct path *path)
#ifdef CONFIG_USELIB
/*
diff --git a/fs/fcntl.c b/fs/fcntl.c
-index c91b3e3..7751309 100644
+index 78234ee16784..2072f690b121 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 e49af4c..569020f 100644
+index 5679e7fcb6b0..961eec3df1eb 100644
--- a/fs/file_table.c
+++ b/fs/file_table.c
@@ -161,6 +161,7 @@ struct file *alloc_empty_file(int flags, const struct cred *cred)
void __init files_init(void)
{
diff --git a/fs/inode.c b/fs/inode.c
-index fa6ae6a..69d4a6c 100644
+index 4a1756b8b4bd..6e51d5f9b9f3 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -1666,6 +1666,7 @@ int update_time(struct inode *inode, struct timespec64 *time, int flags)
/**
* touch_atime - update the access time
diff --git a/fs/namespace.c b/fs/namespace.c
-index 72c93f3..c49803c 100644
+index 9b6a3d0f87a1..8c4d3d56f2df 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
-@@ -437,6 +437,7 @@ void __mnt_drop_write(struct vfsmount *mnt)
+@@ -434,6 +434,7 @@ 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
-@@ -775,6 +776,7 @@ int is_current_mnt_ns(struct vfsmount *mnt)
+@@ -773,6 +774,7 @@ int is_current_mnt_ns(struct vfsmount *mnt)
{
return check_mnt(real_mount(mnt));
}
/*
* vfsmount lock must be held for write
-@@ -1832,6 +1834,7 @@ int iterate_mounts(int (*f)(struct vfsmount *, void *), void *arg,
+@@ -1842,6 +1844,7 @@ int iterate_mounts(int (*f)(struct vfsmount *, void *), void *arg,
}
return 0;
}
static void cleanup_group_ids(struct mount *mnt, struct mount *end)
{
diff --git a/fs/notify/group.c b/fs/notify/group.c
-index c03b836..817f22c 100644
+index c03b83662876..94d210ca384a 100644
--- a/fs/notify/group.c
+++ b/fs/notify/group.c
-@@ -23,6 +23,7 @@
- #include <linux/rculist.h>
- #include <linux/wait.h>
- #include <linux/memcontrol.h>
-+#include <linux/module.h>
-
- #include <linux/fsnotify_backend.h>
- #include "fsnotify.h"
-@@ -112,6 +113,7 @@ void fsnotify_get_group(struct fsnotify_group *group)
+@@ -112,6 +112,7 @@ void fsnotify_get_group(struct fsnotify_group *group)
{
refcount_inc(&group->refcnt);
}
/*
* Drop a reference to a group. Free it if it's through.
-@@ -121,6 +123,7 @@ void fsnotify_put_group(struct fsnotify_group *group)
+@@ -121,6 +122,7 @@ void fsnotify_put_group(struct fsnotify_group *group)
if (refcount_dec_and_test(&group->refcnt))
fsnotify_final_destroy_group(group);
}
/*
* Create a new fsnotify_group and hold a reference for the group returned.
-@@ -150,6 +153,7 @@ struct fsnotify_group *fsnotify_alloc_group(const struct fsnotify_ops *ops)
+@@ -150,6 +152,7 @@ struct fsnotify_group *fsnotify_alloc_group(const struct fsnotify_ops *ops)
return group;
}
int fsnotify_fasync(int fd, struct file *file, int on)
{
diff --git a/fs/notify/mark.c b/fs/notify/mark.c
-index 59cdb27..ce365c7 100644
+index d2dd16cb5989..cf709b7d611a 100644
--- a/fs/notify/mark.c
+++ b/fs/notify/mark.c
-@@ -263,6 +263,7 @@ void fsnotify_put_mark(struct fsnotify_mark *mark)
+@@ -289,6 +289,7 @@ void fsnotify_put_mark(struct fsnotify_mark *mark)
queue_delayed_work(system_unbound_wq, &reaper_work,
FSNOTIFY_REAPER_DELAY);
}
/*
* Get mark reference when we found the mark via lockless traversal of object
-@@ -417,6 +418,7 @@ void fsnotify_destroy_mark(struct fsnotify_mark *mark,
+@@ -443,6 +444,7 @@ void fsnotify_destroy_mark(struct fsnotify_mark *mark,
mutex_unlock(&group->mark_mutex);
fsnotify_free_mark(mark);
}
/*
* Sorting function for lists of fsnotify marks.
-@@ -632,6 +634,7 @@ int fsnotify_add_mark(struct fsnotify_mark *mark, fsnotify_connp_t *connp,
+@@ -658,6 +660,7 @@ int fsnotify_add_mark(struct fsnotify_mark *mark, fsnotify_connp_t *connp,
mutex_unlock(&group->mark_mutex);
return ret;
}
/*
* Given a list of marks, find the mark associated with given group. If found
-@@ -754,6 +757,7 @@ void fsnotify_init_mark(struct fsnotify_mark *mark,
+@@ -781,6 +784,7 @@ void fsnotify_init_mark(struct fsnotify_mark *mark,
fsnotify_get_group(group);
mark->group = group;
}
/*
* Destroy all marks in destroy_list, waits for SRCU period to finish before
diff --git a/fs/open.c b/fs/open.c
-index 0285ce7..cb81623 100644
+index 0285ce7dbd51..cb81623a8b09 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -64,6 +64,7 @@ int do_truncate(struct dentry *dentry, loff_t length, unsigned int time_attrs,
long vfs_truncate(const struct path *path, loff_t length)
{
diff --git a/fs/read_write.c b/fs/read_write.c
-index 42f64cc..d9cb969 100644
+index 5c18a9e51f37..542e59cd8d27 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -459,6 +459,7 @@ ssize_t vfs_read(struct file *file, char __user *buf, size_t count, loff_t *pos)
static inline loff_t file_pos_read(struct file *file)
{
diff --git a/fs/splice.c b/fs/splice.c
-index 1dd7f96..a5e3bcb 100644
+index 5dcf77b8e1b2..63fe2652c67d 100644
--- a/fs/splice.c
+++ b/fs/splice.c
-@@ -851,6 +851,7 @@ long do_splice_from(struct pipe_inode_info *pipe, struct file *out,
+@@ -850,6 +850,7 @@ long do_splice_from(struct pipe_inode_info *pipe, struct file *out,
return splice_write(pipe, out, ppos, len, flags);
}
/*
* Attempt to initiate a splice from a file to a pipe.
-@@ -880,6 +881,7 @@ long do_splice_to(struct file *in, loff_t *ppos,
+@@ -879,6 +880,7 @@ long do_splice_to(struct file *in, loff_t *ppos,
return splice_read(in, ppos, pipe, len, flags);
}
/**
* splice_direct_to_actor - splices data directly between two non-pipes
diff --git a/fs/sync.c b/fs/sync.c
-index 2860782..ffd7ea4 100644
+index 28607828e96f..ffd7ea43831e 100644
--- a/fs/sync.c
+++ b/fs/sync.c
@@ -39,6 +39,7 @@ int __sync_filesystem(struct super_block *sb, int wait)
/*
* Write out and wait upon all dirty data associated with this
diff --git a/fs/xattr.c b/fs/xattr.c
-index 0d6a6a4..7ce4701 100644
+index 0d6a6a4af861..7ce4701b7289 100644
--- a/fs/xattr.c
+++ b/fs/xattr.c
@@ -295,6 +295,7 @@ vfs_getxattr_alloc(struct dentry *dentry, const char *name, char **xattr_value,
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 fa6f559..7ac19ef 100644
+index 516ab7da26fb..c4f72e461d28 100644
--- a/kernel/locking/lockdep.c
+++ b/kernel/locking/lockdep.c
-@@ -151,6 +151,7 @@ inline struct lock_class *lockdep_hlock_class(struct held_lock *hlock)
+@@ -154,6 +154,7 @@ inline struct lock_class *lockdep_hlock_class(struct held_lock *hlock)
}
return lock_classes + hlock->class_idx - 1;
}
#ifdef CONFIG_LOCK_STAT
diff --git a/kernel/task_work.c b/kernel/task_work.c
-index 0fef395..83fb1ec 100644
+index 0fef395662a6..83fb1ecfc33d 100644
--- a/kernel/task_work.c
+++ b/kernel/task_work.c
@@ -116,3 +116,4 @@ void task_work_run(void)
}
}
+EXPORT_SYMBOL_GPL(task_work_run);
-diff --git a/security/commoncap.c b/security/commoncap.c
-index 2e489d6..1e146da 100644
---- a/security/commoncap.c
-+++ b/security/commoncap.c
-@@ -1336,12 +1336,14 @@ int cap_mmap_addr(unsigned long addr)
- }
- return ret;
- }
-+EXPORT_SYMBOL_GPL(cap_mmap_addr);
-
- int cap_mmap_file(struct file *file, unsigned long reqprot,
- unsigned long prot, unsigned long flags)
- {
- return 0;
- }
-+EXPORT_SYMBOL_GPL(cap_mmap_file);
-
- #ifdef CONFIG_SECURITY
-
diff --git a/security/device_cgroup.c b/security/device_cgroup.c
-index cd97929..424fd23 100644
+index cd97929fac66..20c59b2e3b26 100644
--- a/security/device_cgroup.c
+++ b/security/device_cgroup.c
-@@ -8,6 +8,7 @@
- #include <linux/device_cgroup.h>
- #include <linux/cgroup.h>
- #include <linux/ctype.h>
-+#include <linux/export.h>
- #include <linux/list.h>
- #include <linux/uaccess.h>
- #include <linux/seq_file.h>
-@@ -824,3 +825,4 @@ int __devcgroup_check_permission(short type, u32 major, u32 minor,
+@@ -824,3 +824,4 @@ int __devcgroup_check_permission(short type, u32 major, u32 minor,
return 0;
}
+EXPORT_SYMBOL_GPL(__devcgroup_check_permission);
diff --git a/security/security.c b/security/security.c
-index 736e78d..b314539 100644
+index 55bc49027ba9..b46c4eef1960 100644
--- a/security/security.c
+++ b/security/security.c
-@@ -542,6 +542,7 @@ int security_path_rmdir(const struct path *dir, struct dentry *dentry)
+@@ -566,6 +566,7 @@ 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)
{
-@@ -558,6 +559,7 @@ int security_path_symlink(const struct path *dir, struct dentry *dentry,
+@@ -582,6 +583,7 @@ 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)
-@@ -566,6 +568,7 @@ int security_path_link(struct dentry *old_dentry, const struct path *new_dir,
+@@ -590,6 +592,7 @@ 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,
-@@ -593,6 +596,7 @@ int security_path_truncate(const struct path *path)
+@@ -617,6 +620,7 @@ 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)
{
-@@ -600,6 +604,7 @@ int security_path_chmod(const struct path *path, umode_t mode)
+@@ -624,6 +628,7 @@ 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)
{
-@@ -607,6 +612,7 @@ int security_path_chown(const struct path *path, kuid_t uid, kgid_t gid)
+@@ -631,6 +636,7 @@ 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)
{
-@@ -692,6 +698,7 @@ int security_inode_readlink(struct dentry *dentry)
- return 0;
- return call_int_hook(inode_readlink, 0, dentry);
- }
-+EXPORT_SYMBOL_GPL(security_inode_readlink);
-
- int security_inode_follow_link(struct dentry *dentry, struct inode *inode,
- bool rcu)
-@@ -707,6 +714,7 @@ int security_inode_permission(struct inode *inode, int mask)
+@@ -731,6 +737,7 @@ 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)
{
-@@ -878,6 +886,7 @@ int security_file_permission(struct file *file, int mask)
+@@ -902,6 +909,7 @@ int security_file_permission(struct file *file, int mask)
return fsnotify_perm(file, mask);
}
int security_file_alloc(struct file *file)
{
-@@ -937,6 +946,7 @@ int security_mmap_file(struct file *file, unsigned long prot,
+@@ -961,6 +969,7 @@ int security_mmap_file(struct file *file, unsigned long prot,
return ret;
return ima_file_mmap(file, prot);
}
+ 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 2018-04-15 08:49:13.394483860 +0200
++++ linux/Documentation/filesystems/aufs/design/01intro.txt 2019-03-05 12:13:00.132557473 +0100
@@ -0,0 +1,171 @@
+
-+# Copyright (C) 2005-2018 Junjiro R. Okajima
++# Copyright (C) 2005-2019 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 2018-04-15 08:49:13.394483860 +0200
++++ linux/Documentation/filesystems/aufs/design/02struct.txt 2019-03-05 12:13:00.132557473 +0100
@@ -0,0 +1,258 @@
+
-+# Copyright (C) 2005-2018 Junjiro R. Okajima
++# Copyright (C) 2005-2019 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 2018-04-15 08:49:13.394483860 +0200
++++ linux/Documentation/filesystems/aufs/design/03atomic_open.txt 2019-03-05 12:13:00.132557473 +0100
@@ -0,0 +1,85 @@
+
-+# Copyright (C) 2015-2018 Junjiro R. Okajima
++# Copyright (C) 2015-2019 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 2018-04-15 08:49:13.394483860 +0200
++++ linux/Documentation/filesystems/aufs/design/03lookup.txt 2019-03-05 12:13:00.132557473 +0100
@@ -0,0 +1,113 @@
+
-+# Copyright (C) 2005-2018 Junjiro R. Okajima
++# Copyright (C) 2005-2019 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 2018-04-15 08:49:13.394483860 +0200
++++ linux/Documentation/filesystems/aufs/design/04branch.txt 2019-03-05 12:13:00.132557473 +0100
@@ -0,0 +1,74 @@
+
-+# Copyright (C) 2005-2018 Junjiro R. Okajima
++# Copyright (C) 2005-2019 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 2018-04-15 08:49:13.394483860 +0200
++++ linux/Documentation/filesystems/aufs/design/05wbr_policy.txt 2019-03-05 12:13:00.132557473 +0100
@@ -0,0 +1,64 @@
+
-+# Copyright (C) 2005-2018 Junjiro R. Okajima
++# Copyright (C) 2005-2019 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
+}
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 2018-04-15 08:49:13.394483860 +0200
++++ linux/Documentation/filesystems/aufs/design/06dirren.txt 2019-03-05 12:13:00.132557473 +0100
@@ -0,0 +1,102 @@
+
-+# Copyright (C) 2017-2018 Junjiro R. Okajima
++# Copyright (C) 2017-2019 Junjiro R. Okajima
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+equivalen to udba=reval case.
diff -urN /usr/share/empty/Documentation/filesystems/aufs/design/06fhsm.txt linux/Documentation/filesystems/aufs/design/06fhsm.txt
--- /usr/share/empty/Documentation/filesystems/aufs/design/06fhsm.txt 1970-01-01 01:00:00.000000000 +0100
-+++ linux/Documentation/filesystems/aufs/design/06fhsm.txt 2018-04-15 08:49:13.394483860 +0200
++++ linux/Documentation/filesystems/aufs/design/06fhsm.txt 2019-03-05 12:13:00.132557473 +0100
@@ -0,0 +1,120 @@
+
-+# Copyright (C) 2011-2018 Junjiro R. Okajima
++# Copyright (C) 2011-2019 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 2018-04-15 08:49:13.394483860 +0200
++++ linux/Documentation/filesystems/aufs/design/06mmap.txt 2019-03-05 12:13:00.132557473 +0100
@@ -0,0 +1,72 @@
+
-+# Copyright (C) 2005-2018 Junjiro R. Okajima
++# Copyright (C) 2005-2019 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 2018-04-15 08:49:13.394483860 +0200
++++ linux/Documentation/filesystems/aufs/design/06xattr.txt 2019-03-05 12:13:00.132557473 +0100
@@ -0,0 +1,96 @@
+
-+# Copyright (C) 2014-2018 Junjiro R. Okajima
++# Copyright (C) 2014-2019 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 2018-04-15 08:49:13.394483860 +0200
++++ linux/Documentation/filesystems/aufs/design/07export.txt 2019-03-05 12:13:00.132557473 +0100
@@ -0,0 +1,58 @@
+
-+# Copyright (C) 2005-2018 Junjiro R. Okajima
++# Copyright (C) 2005-2019 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 2018-04-15 08:49:13.394483860 +0200
++++ linux/Documentation/filesystems/aufs/design/08shwh.txt 2019-03-05 12:13:00.135890907 +0100
@@ -0,0 +1,52 @@
+
-+# Copyright (C) 2005-2018 Junjiro R. Okajima
++# Copyright (C) 2005-2019 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 2018-04-15 08:49:13.394483860 +0200
++++ linux/Documentation/filesystems/aufs/design/10dynop.txt 2019-03-05 12:13:00.135890907 +0100
@@ -0,0 +1,47 @@
+
-+# Copyright (C) 2010-2018 Junjiro R. Okajima
++# Copyright (C) 2010-2019 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 2018-10-23 12:33:35.579375203 +0200
-@@ -0,0 +1,394 @@
++++ linux/Documentation/filesystems/aufs/README 2019-07-08 09:31:38.324384703 +0200
+@@ -0,0 +1,402 @@
+
+Aufs4 -- advanced multi layered unification filesystem version 4.x
+http://aufs.sf.net
+ 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
+Tomasz Szewczyk made a donation (2016/4).
+James Burry made a donation (2016/12).
+Carsten Rose made a donation (2018/9).
++Porteus Kiosk made a donation (2018/10).
+
+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 2018-10-23 12:33:35.592708932 +0200
++++ linux/fs/aufs/aufs.h 2019-03-05 12:13:00.135890907 +0100
@@ -0,0 +1,62 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 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 2018-10-23 12:33:35.592708932 +0200
-@@ -0,0 +1,1422 @@
++++ linux/fs/aufs/branch.c 2019-03-05 12:13:00.135890907 +0100
+@@ -0,0 +1,1423 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 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
+
+ if (br->br_fhsm) {
+ au_br_fhsm_fin(br->br_fhsm);
-+ kfree(br->br_fhsm);
++ au_kfree_try_rcu(br->br_fhsm);
+ }
+
+ key = br->br_dykey;
+ lockdep_off();
+ path_put(&br->br_path);
+ lockdep_on();
-+ kfree(wbr);
++ au_kfree_rcu(wbr);
+ au_lcnt_wait_for_fin(&br->br_nfiles);
+ au_lcnt_wait_for_fin(&br->br_count);
+ /* I don't know why, but percpu_refcount requires this */
+ /* synchronize_rcu(); */
-+ kfree(br);
++ au_kfree_rcu(br);
+}
+
+/*
+ return add_branch; /* success */
+
+out_wbr:
-+ kfree(add_branch->br_wbr);
++ au_kfree_rcu(add_branch->br_wbr);
+out_hnotify:
+ au_hnotify_fin_br(add_branch);
+out_xino:
+ au_xino_put(add_branch);
+out_br:
-+ kfree(add_branch);
++ au_kfree_rcu(add_branch);
+out:
+ return ERR_PTR(err);
+}
+ br->br_perm = old_perm;
+
+ if (!err && wbr && !au_br_writable(new_perm)) {
-+ kfree(wbr);
++ au_kfree_rcu(wbr);
+ br->br_wbr = NULL;
+ }
+
+
+ err = copy_from_user(&ibusy, arg, sizeof(ibusy));
+ if (!err)
-+ err = !access_ok(VERIFY_WRITE, &arg->h_ino, sizeof(arg->h_ino));
++ /* VERIFY_WRITE */
++ err = !access_ok(&arg->h_ino, sizeof(arg->h_ino));
+ if (unlikely(err)) {
+ err = -EFAULT;
+ AuTraceErr(err);
+ if (br->br_wbr) {
+ err = au_wbr_init(br, sb, mod->perm);
+ if (unlikely(err)) {
-+ kfree(br->br_wbr);
++ au_kfree_rcu(br->br_wbr);
+ br->br_wbr = NULL;
+ }
+ }
+ if (!au_br_fhsm(mod->perm)) {
+ /* fhsm --> non-fhsm */
+ au_br_fhsm_fin(br->br_fhsm);
-+ kfree(br->br_fhsm);
++ au_kfree_rcu(br->br_fhsm);
+ br->br_fhsm = NULL;
+ }
+ } else if (au_br_fhsm(mod->perm))
+ goto out; /* success */
+
+out_bf:
-+ kfree(bf);
++ au_kfree_try_rcu(bf);
+out:
+ AuTraceErr(err);
+ return err;
+}
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 2018-10-23 12:33:35.592708932 +0200
-@@ -0,0 +1,367 @@
++++ linux/fs/aufs/branch.h 2019-07-08 09:31:38.324384703 +0200
+@@ -0,0 +1,366 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 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
+ } xi_nondir;
+
+ struct mutex xi_mtx; /* protects xi_file array */
-+ /* reserved for future use */
-+ /* wait_queue_head_t xi_wq; */
-+ /* atomic_t xi_pending; */
++ struct hlist_bl_head xi_writing;
+
+ atomic_t xi_truncating;
+
+static const loff_t au_loff_max = LLONG_MAX;
+
+aufs_bindex_t au_xi_root(struct super_block *sb, struct dentry *dentry);
-+struct file *au_xino_create(struct super_block *sb, char *fpath, int silent);
++struct file *au_xino_create(struct super_block *sb, char *fpath, int silent,
++ int wbrtop);
+struct file *au_xino_create2(struct super_block *sb, struct path *base,
+ struct file *copy_src);
+struct au_xi_new {
+-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 2018-10-23 12:33:35.596042364 +0200
-@@ -0,0 +1,1444 @@
++++ linux/fs/aufs/cpup.c 2019-03-05 12:13:00.135890907 +0100
+@@ -0,0 +1,1458 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 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 long blksize;
+ unsigned char do_kfree;
+ char *buf;
++ struct super_block *h_sb;
+
+ err = -ENOMEM;
-+ blksize = dst->f_path.dentry->d_sb->s_blocksize;
++ h_sb = file_inode(dst)->i_sb;
++ blksize = h_sb->s_blocksize;
+ if (!blksize || PAGE_SIZE < blksize)
+ blksize = PAGE_SIZE;
+ AuDbg("blksize %lu\n", blksize);
+ src->f_pos = 0;
+ dst->f_pos = 0;
+ err = au_do_copy_file(dst, src, len, buf, blksize);
-+ if (do_kfree)
-+ kfree(buf);
-+ else
++ if (do_kfree) {
++ AuDebugOn(!au_kfree_do_sz_test(blksize));
++ au_kfree_do_rcu(buf);
++ } else
+ free_page((unsigned long)buf);
+
+out:
+static int au_clone_or_copy(struct file *dst, struct file *src, loff_t len)
+{
+ int err;
++ loff_t lo;
+ struct super_block *h_src_sb;
+ struct inode *h_src_inode;
+
+ h_src_inode = file_inode(src);
+ h_src_sb = h_src_inode->i_sb;
+ if (h_src_sb != file_inode(dst)->i_sb
-+ || !dst->f_op->clone_file_range) {
++ || !dst->f_op->remap_file_range) {
+ err = au_do_copy(dst, src, len);
+ goto out;
+ }
+
+ if (!au_test_nfs(h_src_sb)) {
+ inode_unlock_shared(h_src_inode);
-+ err = vfsub_clone_file_range(src, dst, len);
++ lo = vfsub_clone_file_range(src, dst, len);
+ inode_lock_shared_nested(h_src_inode, AuLsc_I_CHILD);
+ } else
-+ err = vfsub_clone_file_range(src, dst, len);
-+ /* older XFS has a condition in cloning */
-+ if (unlikely(err != -EOPNOTSUPP))
++ lo = vfsub_clone_file_range(src, dst, len);
++ if (lo == len) {
++ err = 0;
++ goto out; /* success */
++ } else if (lo >= 0)
++ /* todo: possible? */
++ /* paritially succeeded */
++ AuDbg("lo %lld, len %lld. Retrying.\n", lo, len);
++ else if (lo != -EOPNOTSUPP) {
++ /* older XFS has a condition in cloning */
++ err = lo;
+ goto out;
++ }
+
+ /* the backend fs on NFS may not support cloning */
+ err = au_do_copy(dst, src, len);
+ struct dentry *dentry;
+ int force_wr;
+ struct file *file;
-+ void *label;
+ } *f, file[] = {
+ {
+ .bindex = cpg->bsrc,
+ .flags = O_RDONLY | O_NOATIME | O_LARGEFILE,
-+ .label = &&out
+ },
+ {
+ .bindex = cpg->bdst,
+ .flags = O_WRONLY | O_NOATIME | O_LARGEFILE,
+ .force_wr = !!au_ftest_cpup(cpg->flags, RWDST),
-+ .label = &&out_src
+ }
+ };
+ struct au_branch *br;
+ f->dentry = au_h_dptr(cpg->dentry, f->bindex);
+ f->file = au_h_open(cpg->dentry, f->bindex, f->flags,
+ /*file*/NULL, f->force_wr);
-+ err = PTR_ERR(f->file);
-+ if (IS_ERR(f->file))
-+ goto *f->label;
++ if (IS_ERR(f->file)) {
++ err = PTR_ERR(f->file);
++ if (i == SRC)
++ goto out;
++ else
++ goto out_src;
++ }
+ }
+
+ /* try stopping to update while we copyup */
+ }
+out_parent:
+ dput(dst_parent);
-+ kfree(a);
++ au_kfree_rcu(a);
+out:
+ return err;
+}
+}
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 2018-08-12 23:43:05.453457863 +0200
++++ linux/fs/aufs/cpup.h 2019-03-05 12:13:00.135890907 +0100
@@ -0,0 +1,100 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 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 2018-10-23 12:33:35.596042364 +0200
-@@ -0,0 +1,519 @@
++++ linux/fs/aufs/dbgaufs.c 2019-03-05 12:13:00.135890907 +0100
+@@ -0,0 +1,526 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 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 dbgaufs_xi_release(struct inode *inode __maybe_unused,
+ struct file *file)
+{
-+ kfree(file->private_data);
++ void *p;
++
++ p = file->private_data;
++ if (p) {
++ /* this is struct dbgaufs_arg */
++ AuDebugOn(!au_kfree_sz_test(p));
++ au_kfree_do_rcu(p);
++ }
+ return 0;
+}
+
+}
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 2018-08-12 23:43:05.453457863 +0200
++++ linux/fs/aufs/dbgaufs.h 2019-03-05 12:13:00.135890907 +0100
@@ -0,0 +1,53 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 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 2018-08-12 23:43:05.453457863 +0200
++++ linux/fs/aufs/dcsub.c 2019-03-05 12:13:00.135890907 +0100
@@ -0,0 +1,225 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 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 0; /* success */
+
+out_dpages:
-+ kfree(dpages->dpages);
++ au_kfree_try_rcu(dpages->dpages);
+out:
+ return err;
+}
+ p = dpages->dpages;
+ for (i = 0; i < dpages->ndpage; i++)
+ au_dpage_free(p++);
-+ kfree(dpages->dpages);
++ au_kfree_try_rcu(dpages->dpages);
+}
+
+static int au_dpages_append(struct au_dcsub_pages *dpages,
+}
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 2018-08-12 23:43:05.453457863 +0200
++++ linux/fs/aufs/dcsub.h 2019-03-05 12:13:00.135890907 +0100
@@ -0,0 +1,137 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 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 2018-10-23 12:33:35.596042364 +0200
-@@ -0,0 +1,440 @@
++++ linux/fs/aufs/debug.c 2019-05-06 09:03:04.816810402 +0200
+@@ -0,0 +1,441 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 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
+ * debug print functions
+ */
+
++#include <linux/iversion.h>
+#include "aufs.h"
+
+/* Returns 0, or -errno. arg is in kp->arg. */
+ a->mnt.mnt_sb = sb;
+ a->fake.br_path.mnt = &a->mnt;
+ err = do_pri_br(-1, &a->fake);
-+ kfree(a);
++ au_kfree_rcu(a);
+ dpri("dev 0x%x\n", sb->s_dev);
+ if (err || !au_test_aufs(sb))
+ return;
+}
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 2018-08-12 23:43:05.453457863 +0200
++++ linux/fs/aufs/debug.h 2019-03-05 12:13:00.135890907 +0100
@@ -0,0 +1,226 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 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 2018-10-23 12:33:35.596042364 +0200
-@@ -0,0 +1,1153 @@
++++ linux/fs/aufs/dentry.c 2019-05-06 09:03:04.816810402 +0200
+@@ -0,0 +1,1154 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 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
+ * lookup and dentry operations
+ */
+
++#include <linux/iversion.h>
+#include <linux/namei.h>
+#include "aufs.h"
+
+
+out_parent:
+ dput(parent);
-+ kfree(args.whname.name);
++ au_kfree_try_rcu(args.whname.name);
+ if (dirren)
+ au_dr_lkup_fin(&args);
+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 2018-08-12 23:43:05.453457863 +0200
-@@ -0,0 +1,267 @@
++++ linux/fs/aufs/dentry.h 2019-03-05 12:13:00.135890907 +0100
+@@ -0,0 +1,268 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 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
+ aufs_bindex_t di_btop, di_bbot, di_bwh, di_bdiropq;
+ unsigned char di_tmpfile; /* to allow the different name */
+ struct au_hdentry *di_hdentry;
++ struct rcu_head rcu;
+} ____cacheline_aligned_in_smp;
+
+/* ---------------------------------------------------------------------- */
+#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 2018-08-12 23:43:05.453457863 +0200
++++ linux/fs/aufs/dinfo.c 2019-03-05 12:13:00.135890907 +0100
@@ -0,0 +1,554 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 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
+ while (bindex++ <= bbot)
+ au_hdput(p++);
+ }
-+ kfree(dinfo->di_hdentry);
++ au_kfree_try_rcu(dinfo->di_hdentry);
+ au_cache_free_dinfo(dinfo);
+}
+
+}
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 2018-10-23 12:33:35.596042364 +0200
-@@ -0,0 +1,762 @@
++++ linux/fs/aufs/dir.c 2019-05-06 09:03:04.816810402 +0200
+@@ -0,0 +1,763 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 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_stack.h>
++#include <linux/iversion.h>
+#include "aufs.h"
+
+void au_add_nlink(struct inode *dir, struct inode *h_dir)
+out:
+ dput(a->dentry);
+ au_nwt_done(&au_sbi(sb)->si_nowait);
-+ kfree(arg);
++ au_kfree_try_rcu(arg);
+}
+
+void au_dir_ts(struct inode *dir, aufs_bindex_t bindex)
+ if (unlikely(wkq_err)) {
+ pr_err("wkq %d\n", wkq_err);
+ dput(dentry);
-+ kfree(arg);
++ au_kfree_try_rcu(arg);
+ }
+
+out:
+ };
+ err = au_do_open(file, &args);
+ if (unlikely(err))
-+ kfree(fidir);
++ au_kfree_rcu(fidir);
+ }
+ si_read_unlock(sb);
+ return err;
+ if (hf->hf_file)
+ au_hfput(hf, /*execed*/0);
+ }
-+ kfree(fidir);
++ au_kfree_rcu(fidir);
+ finfo->fi_hdir = NULL;
+ }
+ au_finfo_fin(file);
+};
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 2018-08-12 23:43:05.453457863 +0200
-@@ -0,0 +1,132 @@
++++ linux/fs/aufs/dir.h 2019-03-05 12:13:00.139224339 +0100
+@@ -0,0 +1,134 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+struct au_vdir_dehstr {
+ struct hlist_node hash;
+ struct au_vdir_destr *str;
++ struct rcu_head rcu;
+} ____cacheline_aligned_in_smp;
+
+struct au_vdir_de {
+
+ u64 vd_version;
+ unsigned int vd_deblk_sz;
-+ unsigned long vd_jiffy;
++ unsigned long vd_jiffy;
++ struct rcu_head rcu;
+} ____cacheline_aligned_in_smp;
+
+/* ---------------------------------------------------------------------- */
+#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 2018-10-23 12:33:35.596042364 +0200
++++ linux/fs/aufs/dirren.c 2019-03-05 12:13:00.139224339 +0100
@@ -0,0 +1,1316 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2017-2018 Junjiro R. Okajima
++ * Copyright (C) 2017-2019 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
+ hbl = dr->dr_h_ino + i;
+ /* no spinlock since sbinfo must be write-locked */
+ hlist_bl_for_each_entry_safe(ent, pos, tmp, hbl, dr_hnode)
-+ kfree(ent);
++ au_kfree_rcu(ent);
+ INIT_HLIST_BL_HEAD(hbl);
+ }
+}
+ *ret = *drinfo;
+ ssz = vfsub_read_k(file, (void *)ret->oldname, len, &pos);
+ if (unlikely(ssz != len)) {
-+ kfree(ret);
++ au_kfree_rcu(ret);
+ ret = ERR_PTR(-EIO);
+ AuIOErr("ssz %zd, %u, %pD2\n", ssz, len, file);
+ goto out;
+
+static void au_drinfo_store_work_fin(struct au_drinfo_store *w)
+{
-+ kfree(w->fdata);
++ au_kfree_rcu(w->fdata);
+}
+
+static void au_drinfo_store_rev(struct au_drinfo_rev *rev,
+ elm->info_last->oldname,
+ elm->info_last->oldnamelen);
+ err = au_drinfo_store_sio(w, /*elm*/NULL);
-+ kfree(elm->info_last);
++ au_kfree_rcu(elm->info_last);
+ }
+ if (unlikely(err))
+ AuIOErr("%d, %s\n", err, w->whname);
+ if (unlikely(err)) {
+ /* revert all drinfo */
+ au_drinfo_store_rev(rev, &work);
-+ kfree(rev);
++ au_kfree_try_rcu(rev);
+ *p = NULL;
+ }
+ au_hn_inode_unlock(hdir);
+ /* revert */
+ if (!already)
+ au_dr_hino_del(dr, ent);
-+ kfree(ent);
++ au_kfree_rcu(ent);
+
+out:
+ AuTraceErr(err);
+ elm = rev->elm;
+ for (nelm = rev->nelm; nelm > 0; nelm--, elm++) {
+ dput(elm->info_dentry);
-+ kfree(elm->info_last);
++ au_kfree_rcu(elm->info_last);
+ }
-+ kfree(rev);
++ au_kfree_try_rcu(rev);
+}
+
+void au_dr_rename_rev(struct dentry *src, aufs_bindex_t btgt, void *_rev)
+ ent = au_dr_hino_find(dr, h_inode->i_ino);
+ BUG_ON(!ent);
+ au_dr_hino_del(dr, ent);
-+ kfree(ent);
++ au_kfree_rcu(ent);
+
+out:
-+ kfree(rev);
++ au_kfree_try_rcu(rev);
+ if (unlikely(err))
+ pr_err("failed to remove dirren info\n");
+}
+ oldname.name = drinfo->oldname;
+ if (au_qstreq(w->qname, &oldname)) {
+ /* the name is renamed back */
-+ kfree(drinfo);
++ au_kfree_rcu(drinfo);
+ drinfo = NULL;
+
+ infopath.dentry = info_dentry;
+ if (unlikely(e == -EWOULDBLOCK))
+ iput(delegated);
+ }
-+ kfree(w->drinfo[bindex]);
++ au_kfree_rcu(w->drinfo[bindex]);
+ w->drinfo[bindex] = drinfo;
+ dput(info_dentry);
+
+ struct au_drinfo **p = drinfo;
+
+ while (n-- > 0)
-+ kfree(*drinfo++);
-+ kfree(p);
++ au_kfree_rcu(*drinfo++);
++ au_kfree_try_rcu(p);
+}
+
+int au_dr_lkup(struct au_do_lookup_args *lkup, struct dentry *dentry,
+ ent = au_dr_hino_find(&br->br_dirren, h_dir->i_ino);
+ AuDebugOn(!ent);
+ au_dr_hino_del(&br->br_dirren, ent);
-+ kfree(ent);
++ au_kfree_rcu(ent);
+ }
+ goto out; /* success */
+
+ if (!drinfo)
+ goto out;
+
-+ kfree(lkup->whname.name);
++ au_kfree_try_rcu(lkup->whname.name);
+ lkup->whname.name = NULL;
+ lkup->dirren.dr_name.len = drinfo->oldnamelen;
+ lkup->dirren.dr_name.name = drinfo->oldname;
+}
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 2018-08-12 23:43:05.453457863 +0200
++++ linux/fs/aufs/dirren.h 2019-03-05 12:13:00.139224339 +0100
@@ -0,0 +1,140 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2017-2018 Junjiro R. Okajima
++ * Copyright (C) 2017-2019 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 2018-10-23 12:33:35.596042364 +0200
++++ linux/fs/aufs/dynop.c 2019-07-08 09:31:38.324384703 +0200
@@ -0,0 +1,370 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2010-2018 Junjiro R. Okajima
++ * Copyright (C) 2010-2019 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
+ hlist_bl_lock(hbl);
+ hlist_bl_for_each_entry(tmp, pos, hbl, dk_hnode)
+ if (tmp->dk_op.dy_hop == h_op) {
-+ key = tmp;
-+ kref_get(&key->dk_kref);
++ if (kref_get_unless_zero(&tmp->dk_kref))
++ key = tmp;
+ break;
+ }
+ hlist_bl_unlock(hbl);
+ hlist_bl_lock(hbl);
+ hlist_bl_for_each_entry(tmp, pos, hbl, dk_hnode)
+ if (tmp->dk_op.dy_hop == h_op) {
-+ kref_get(&tmp->dk_kref);
-+ found = tmp;
++ if (kref_get_unless_zero(&tmp->dk_kref))
++ found = tmp;
+ break;
+ }
+ if (!found)
+ p->set(key, op->dy_hop, au_br_sb(br));
+ old = dy_gadd(hbl, key);
+ if (old) {
-+ kfree(key);
++ au_kfree_rcu(key);
+ key = old;
+ }
+
+}
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 2018-08-12 23:43:05.456791299 +0200
++++ linux/fs/aufs/dynop.h 2019-03-05 12:13:00.139224339 +0100
@@ -0,0 +1,75 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2010-2018 Junjiro R. Okajima
++ * Copyright (C) 2010-2019 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 2018-10-23 12:33:35.596042364 +0200
++++ linux/fs/aufs/export.c 2019-03-05 12:13:00.139224339 +0100
@@ -0,0 +1,838 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 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/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 2018-10-23 12:33:35.596042364 +0200
++++ linux/fs/aufs/fhsm.c 2019-03-05 12:13:00.139224339 +0100
@@ -0,0 +1,427 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2011-2018 Junjiro R. Okajima
++ * Copyright (C) 2011-2019 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 2018-10-23 12:33:35.596042364 +0200
++++ linux/fs/aufs/file.c 2019-03-05 12:13:00.139224339 +0100
@@ -0,0 +1,863 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+};
diff -urN /usr/share/empty/fs/aufs/file.h linux/fs/aufs/file.h
--- /usr/share/empty/fs/aufs/file.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/file.h 2018-08-12 23:43:05.456791299 +0200
-@@ -0,0 +1,341 @@
++++ linux/fs/aufs/file.h 2019-03-05 12:13:00.139224339 +0100
+@@ -0,0 +1,342 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+
+ struct hlist_bl_node fi_hlist;
+ struct file *fi_file; /* very ugly */
++ struct rcu_head rcu;
+} ____cacheline_aligned_in_smp;
+
+/* ---------------------------------------------------------------------- */
+#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 2018-10-23 12:33:35.596042364 +0200
++++ linux/fs/aufs/finfo.c 2019-03-05 12:13:00.139224339 +0100
@@ -0,0 +1,149 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 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 2018-10-23 12:33:35.596042364 +0200
++++ linux/fs/aufs/f_op.c 2019-03-05 12:13:00.139224339 +0100
@@ -0,0 +1,819 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 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/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 2018-08-12 23:43:05.456791299 +0200
++++ linux/fs/aufs/fstype.h 2019-03-05 12:13:00.139224339 +0100
@@ -0,0 +1,401 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+#endif /* __AUFS_FSTYPE_H__ */
diff -urN /usr/share/empty/fs/aufs/hbl.h linux/fs/aufs/hbl.h
--- /usr/share/empty/fs/aufs/hbl.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/hbl.h 2018-08-12 23:43:05.456791299 +0200
++++ linux/fs/aufs/hbl.h 2019-03-05 12:13:00.139224339 +0100
@@ -0,0 +1,65 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2017-2018 Junjiro R. Okajima
++ * Copyright (C) 2017-2019 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 2018-10-23 12:33:35.596042364 +0200
++++ linux/fs/aufs/hfsnotify.c 2019-03-05 12:13:00.139224339 +0100
@@ -0,0 +1,289 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 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_br_hfsnotify *hfsn = group->private;
+
+ /* AuDbg("here\n"); */
-+ kfree(hfsn);
++ au_kfree_try_rcu(hfsn);
+}
+
+static int au_hfsn_handle_event(struct fsnotify_group *group,
+ struct inode *inode,
+ u32 mask, const void *data, int data_type,
-+ const unsigned char *file_name, u32 cookie,
++ const struct qstr *file_name, u32 cookie,
+ struct fsnotify_iter_info *iter_info)
+{
+ int err;
+ struct au_hnotify *hnotify;
+ struct inode *h_dir, *h_inode;
-+ struct qstr h_child_qstr = QSTR_INIT(file_name, strlen(file_name));
++
+ struct fsnotify_mark *inode_mark;
+
+ AuDebugOn(data_type != FSNOTIFY_EVENT_INODE);
+ h_inode = NULL;
+#ifdef AuDbgHnotify
+ au_debug_on();
-+ if (1 || h_child_qstr.len != sizeof(AUFS_XINO_FNAME) - 1
-+ || strncmp(h_child_qstr.name, AUFS_XINO_FNAME, h_child_qstr.len)) {
++ if (1 || file_name.len != sizeof(AUFS_XINO_FNAME) - 1
++ || strncmp(file_name.name, AUFS_XINO_FNAME, file_name.len)) {
+ AuDbg("i%lu, mask 0x%x %s, hcname %.*s, hi%lu\n",
+ h_dir->i_ino, mask, au_hfsn_name(mask),
-+ AuLNPair(&h_child_qstr), h_inode ? h_inode->i_ino : 0);
++ AuLNPair(file_name), h_inode ? h_inode->i_ino : 0);
+ /* WARN_ON(1); */
+ }
+ au_debug_off();
+ inode_mark = fsnotify_iter_inode_mark(iter_info);
+ AuDebugOn(!inode_mark);
+ hnotify = container_of(inode_mark, struct au_hnotify, hn_mark);
-+ err = au_hnotify(h_dir, hnotify, mask, &h_child_qstr, h_inode);
++ err = au_hnotify(h_dir, hnotify, mask, file_name, h_inode);
+
+out:
+ return err;
+ goto out; /* success */
+
+out_hfsn:
-+ kfree(hfsn);
++ au_kfree_try_rcu(hfsn);
+out:
+ return 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 2018-10-23 12:33:35.596042364 +0200
++++ linux/fs/aufs/hfsplus.c 2019-03-05 12:13:00.139224339 +0100
@@ -0,0 +1,60 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2010-2018 Junjiro R. Okajima
++ * Copyright (C) 2010-2019 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 2018-10-23 12:33:35.596042364 +0200
-@@ -0,0 +1,720 @@
++++ linux/fs/aufs/hnotify.c 2019-05-06 09:03:04.816810402 +0200
+@@ -0,0 +1,721 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 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
+ * abstraction to notify the direct changes on lower directories
+ */
+
++/* #include <linux/iversion.h> */
+#include "aufs.h"
+
+int au_hn_alloc(struct au_hinode *hinode, struct inode *inode)
+ iput(a->dir);
+ si_write_unlock(sb);
+ au_nwt_done(&sbinfo->si_nowait);
-+ kfree(a);
++ au_kfree_rcu(a);
+}
+
+/* ---------------------------------------------------------------------- */
+
+int au_hnotify(struct inode *h_dir, struct au_hnotify *hnotify, u32 mask,
-+ struct qstr *h_child_qstr, struct inode *h_child_inode)
++ const struct qstr *h_child_qstr, struct inode *h_child_inode)
+{
+ int err, len;
+ unsigned int flags[AuHnLast], f;
+ iput(args->h_child_inode);
+ iput(args->h_dir);
+ iput(args->dir);
-+ kfree(args);
++ au_kfree_rcu(args);
+ }
+
+out:
+}
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 2018-10-23 12:33:35.599375796 +0200
++++ linux/fs/aufs/iinfo.c 2019-03-05 12:13:00.139224339 +0100
@@ -0,0 +1,286 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 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
+ hi++;
+ }
+ }
-+ kfree(iinfo->ii_hinode);
++ au_kfree_rcu(iinfo->ii_hinode);
+ AuRwDestroy(&iinfo->ii_rwsem);
+}
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 2018-08-12 23:43:05.460124736 +0200
-@@ -0,0 +1,528 @@
++++ linux/fs/aufs/inode.c 2019-05-06 09:03:04.820143837 +0200
+@@ -0,0 +1,529 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 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
+ * inode functions
+ */
+
++#include <linux/iversion.h>
+#include "aufs.h"
+
+struct inode *au_igrab(struct inode *inode)
+}
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 2018-08-12 23:43:05.460124736 +0200
-@@ -0,0 +1,696 @@
++++ linux/fs/aufs/inode.h 2019-03-05 12:13:00.142557771 +0100
+@@ -0,0 +1,698 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 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 fsnotify_mark hn_mark;
+#endif
+ struct inode *hn_aufs_inode; /* no get/put */
++ struct rcu_head rcu;
+#endif
+} ____cacheline_aligned_in_smp;
+
+};
+
+struct au_icntnr {
-+ struct au_iinfo iinfo;
-+ struct inode vfs_inode;
-+ struct hlist_bl_node plink;
++ struct au_iinfo iinfo;
++ struct inode vfs_inode;
++ struct hlist_bl_node plink;
++ struct rcu_head rcu;
+} ____cacheline_aligned_in_smp;
+
+/* au_pin flags */
+void au_hn_ctl(struct au_hinode *hinode, int do_set);
+void au_hn_reset(struct inode *inode, unsigned int flags);
+int au_hnotify(struct inode *h_dir, struct au_hnotify *hnotify, u32 mask,
-+ struct qstr *h_child_qstr, struct inode *h_child_inode);
++ const struct qstr *file_name, struct inode *h_child_inode);
+int au_hnotify_reset_br(unsigned int udba, struct au_branch *br, int perm);
+int au_hnotify_init_br(struct au_branch *br, int perm);
+void au_hnotify_fin_br(struct au_branch *br);
+#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 2018-10-23 12:33:35.599375796 +0200
++++ linux/fs/aufs/ioctl.c 2019-03-05 12:13:00.142557771 +0100
@@ -0,0 +1,220 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 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 2018-10-23 12:33:35.596042364 +0200
-@@ -0,0 +1,935 @@
++++ linux/fs/aufs/i_op_add.c 2019-05-06 09:03:04.816810402 +0200
+@@ -0,0 +1,936 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 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
+ * inode operations (add entry)
+ */
+
++#include <linux/iversion.h>
+#include "aufs.h"
+
+/*
+ if (!try_aopen)
+ aufs_read_unlock(dentry, AuLock_DW);
+out_free:
-+ kfree(a);
++ au_kfree_rcu(a);
+out:
+ return err;
+}
+ }
+ aufs_read_and_write_unlock2(dentry, src_dentry);
+out_kfree:
-+ kfree(a);
++ au_kfree_rcu(a);
+out:
+ AuTraceErr(err);
+ return err;
+ }
+ aufs_read_unlock(dentry, AuLock_DW);
+out_free:
-+ kfree(a);
++ au_kfree_rcu(a);
+out:
+ return err;
+}
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 2018-10-23 12:33:35.596042364 +0200
-@@ -0,0 +1,1506 @@
++++ linux/fs/aufs/i_op.c 2019-05-06 09:03:04.816810402 +0200
+@@ -0,0 +1,1507 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 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"
+out_si:
+ si_read_unlock(sb);
+out_kfree:
-+ kfree(a);
++ au_kfree_rcu(a);
+out:
+ AuTraceErr(err);
+ return err;
+ di_write_unlock(dentry);
+ si_read_unlock(sb);
+out_kfree:
-+ kfree(a);
++ au_kfree_rcu(a);
+out:
+ AuTraceErr(err);
+ return err;
+};
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 2018-10-23 12:33:35.599375796 +0200
-@@ -0,0 +1,512 @@
++++ linux/fs/aufs/i_op_del.c 2019-05-06 09:03:04.816810402 +0200
+@@ -0,0 +1,513 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 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
+ * inode operations (del entry)
+ */
+
++#include <linux/iversion.h>
+#include "aufs.h"
+
+/*
+out_unlock:
+ aufs_read_unlock(dentry, AuLock_DW);
+out_free:
-+ kfree(a);
++ au_kfree_rcu(a);
+out:
+ return err;
+}
+out_unlock:
+ aufs_read_unlock(dentry, AuLock_DW);
+out_free:
-+ kfree(a);
++ au_kfree_rcu(a);
+out:
+ AuTraceErr(err);
+ return err;
+}
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 2018-10-23 12:33:35.599375796 +0200
-@@ -0,0 +1,1249 @@
++++ linux/fs/aufs/i_op_ren.c 2019-05-06 09:03:04.820143837 +0200
+@@ -0,0 +1,1250 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 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
+ * todo: this is crazy monster
+ */
+
++#include <linux/iversion.h>
+#include "aufs.h"
+
+enum { AuSRC, AuDST, AuSrcDst };
+ iput(a->dst_inode);
+ if (a->thargs)
+ au_whtmp_rmdir_free(a->thargs);
-+ kfree(a);
++ au_kfree_rcu(a);
+out:
+ AuTraceErr(err);
+ return err;
+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 2018-10-23 12:33:35.599375796 +0200
++++ linux/fs/aufs/lcnt.h 2019-03-05 12:13:00.142557771 +0100
@@ -0,0 +1,186 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2018 Junjiro R. Okajima
++ * Copyright (C) 2018-2019 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 2018-08-12 23:43:05.460124736 +0200
++++ linux/fs/aufs/loop.c 2019-03-05 12:13:00.142557771 +0100
@@ -0,0 +1,148 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 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
+{
+ if (backing_file_func)
+ symbol_put(loop_backing_file);
-+ kfree(au_warn_loopback_array);
++ au_kfree_try_rcu(au_warn_loopback_array);
+}
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 2018-08-12 23:43:05.460124736 +0200
-@@ -0,0 +1,53 @@
++++ linux/fs/aufs/loop.h 2019-07-08 09:31:38.324384703 +0200
+@@ -0,0 +1,55 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 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 au_loopback_init(void);
+void au_loopback_fin(void);
+#else
++AuStub(struct file *, loop_backing_file, return NULL, struct super_block *sb)
++
+AuStubInt0(au_test_loopback_overlap, struct super_block *sb,
+ struct dentry *h_adding)
+AuStubInt0(au_test_loopback_kthread, void)
+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 2018-08-12 23:43:05.460124736 +0200
++++ linux/fs/aufs/module.c 2019-03-05 12:13:00.142557771 +0100
@@ -0,0 +1,273 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 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
+ if (p) {
+#if 0 /* unused */
+ if (!new_sz) {
-+ kfree(p);
++ au_kfree_rcu(p);
+ p = NULL;
+ goto out;
+ }
+ if (q) {
+ if (p) {
+ memcpy(q, p, new_sz);
-+ kfree(p);
++ au_kfree_try_rcu(p);
+ }
+ p = q;
+ } else
+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 2018-08-12 23:43:05.460124736 +0200
-@@ -0,0 +1,102 @@
++++ linux/fs/aufs/module.h 2019-03-05 12:13:00.142557771 +0100
+@@ -0,0 +1,166 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 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/slab.h>
++#include "debug.h"
++#include "dentry.h"
++#include "dir.h"
++#include "file.h"
++#include "inode.h"
+
+struct path;
+struct seq_file;
+void *au_kzrealloc(void *p, unsigned int nused, unsigned int new_sz, gfp_t gfp,
+ int may_shrink);
+
++/*
++ * Comparing the size of the object with sizeof(struct rcu_head)
++ * case 1: object is always larger
++ * --> au_kfree_rcu() or au_kfree_do_rcu()
++ * case 2: object is always smaller
++ * --> au_kfree_small()
++ * case 3: object can be any size
++ * --> au_kfree_try_rcu()
++ */
++
++static inline void au_kfree_do_rcu(const void *p)
++{
++ struct {
++ struct rcu_head rcu;
++ } *a = (void *)p;
++
++ kfree_rcu(a, rcu);
++}
++
++#define au_kfree_rcu(_p) do { \
++ typeof(_p) p = (_p); \
++ BUILD_BUG_ON(sizeof(*p) < sizeof(struct rcu_head)); \
++ if (p) \
++ au_kfree_do_rcu(p); \
++ } while (0)
++
++#define au_kfree_do_sz_test(sz) (sz >= sizeof(struct rcu_head))
++#define au_kfree_sz_test(p) (p && au_kfree_do_sz_test(ksize(p)))
++
++static inline void au_kfree_try_rcu(const void *p)
++{
++ if (!p)
++ return;
++ if (au_kfree_sz_test(p))
++ au_kfree_do_rcu(p);
++ else
++ kfree(p);
++}
++
++static inline void au_kfree_small(const void *p)
++{
++ if (!p)
++ return;
++ AuDebugOn(au_kfree_sz_test(p));
++ kfree(p);
++}
++
+static inline int au_kmidx_sub(size_t sz, size_t new_sz)
+{
+#ifndef CONFIG_SLOB
+ kmem_cache_create(#type, sizeof(struct type), \
+ __alignof__(struct type), AuCacheFlags, ctor)
+
-+#define AuCacheFuncs(name, index) \
-+static inline struct au_##name *au_cache_alloc_##name(void) \
-+{ return kmem_cache_alloc(au_cache[AuCache_##index], GFP_NOFS); } \
-+static inline void au_cache_free_##name(struct au_##name *p) \
-+{ kmem_cache_free(au_cache[AuCache_##index], p); }
++#define AuCacheFuncs(name, index) \
++ static inline struct au_##name *au_cache_alloc_##name(void) \
++ { return kmem_cache_alloc(au_cache[AuCache_##index], GFP_NOFS); } \
++ static inline void au_cache_free_##name##_norcu(struct au_##name *p) \
++ { kmem_cache_free(au_cache[AuCache_##index], p); } \
++ \
++ static inline void au_cache_free_##name##_rcu_cb(struct rcu_head *rcu) \
++ { void *p = rcu; \
++ p -= offsetof(struct au_##name, rcu); \
++ kmem_cache_free(au_cache[AuCache_##index], p); } \
++ static inline void au_cache_free_##name##_rcu(struct au_##name *p) \
++ { BUILD_BUG_ON(sizeof(struct au_##name) < sizeof(struct rcu_head)); \
++ call_rcu(&p->rcu, au_cache_free_##name##_rcu_cb); } \
++ \
++ static inline void au_cache_free_##name(struct au_##name *p) \
++ { /* au_cache_free_##name##_norcu(p); */ \
++ au_cache_free_##name##_rcu(p); }
+
+AuCacheFuncs(dinfo, DINFO);
+AuCacheFuncs(icntnr, ICNTNR);
+#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 2018-08-12 23:43:05.460124736 +0200
-@@ -0,0 +1,705 @@
++++ linux/fs/aufs/mvdown.c 2019-03-05 12:13:00.142557771 +0100
+@@ -0,0 +1,706 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2011-2018 Junjiro R. Okajima
++ * Copyright (C) 2011-2019 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 = copy_from_user(&args->mvdown, uarg, sizeof(args->mvdown));
+ if (!err)
-+ err = !access_ok(VERIFY_WRITE, uarg, sizeof(*uarg));
++ /* VERIFY_WRITE */
++ err = !access_ok(uarg, sizeof(*uarg));
+ if (unlikely(err)) {
+ err = -EFAULT;
+ AuTraceErr(err);
+ e = copy_to_user(uarg, &args->mvdown, sizeof(args->mvdown));
+ if (unlikely(e))
+ err = -EFAULT;
-+ kfree(args);
++ au_kfree_rcu(args);
+out:
+ AuTraceErr(err);
+ return err;
+}
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 2018-10-23 12:33:35.599375796 +0200
++++ linux/fs/aufs/opts.c 2019-07-08 09:31:38.324384703 +0200
@@ -0,0 +1,1877 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 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;
+ struct file *file;
+
-+ file = au_xino_create(sb, args[0].from, /*silent*/0);
++ file = au_xino_create(sb, args[0].from, /*silent*/0, /*wbrtop*/0);
+ err = PTR_ERR(file);
+ if (IS_ERR(file))
+ goto out;
+ }
+ }
+
-+ kfree(a);
++ au_kfree_rcu(a);
+ dump_opts(opts);
+ if (unlikely(err))
+ au_opts_free(opts);
+ au_hn_inode_unlock(hdir);
+
+ if (!err && do_free) {
-+ kfree(wbr);
++ au_kfree_rcu(wbr);
+ br->br_wbr = NULL;
+ }
+ }
+}
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 2018-08-12 23:43:05.460124736 +0200
++++ linux/fs/aufs/opts.h 2019-05-06 09:03:04.820143837 +0200
@@ -0,0 +1,225 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+#define AuOpt_SUM (1 << 10) /* summation for statfs(2) */
+#define AuOpt_SUM_W (1 << 11) /* unimplemented */
+#define AuOpt_WARN_PERM (1 << 12) /* warn when add-branch */
-+#define AuOpt_VERBOSE (1 << 13) /* busy inode when del-branch */
++#define AuOpt_VERBOSE (1 << 13) /* print the cause of error */
+#define AuOpt_DIO (1 << 14) /* direct io */
+#define AuOpt_DIRREN (1 << 15) /* directory rename */
+
+#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 2018-10-23 12:33:35.599375796 +0200
++++ linux/fs/aufs/plink.c 2019-03-05 12:13:00.142557771 +0100
@@ -0,0 +1,516 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+}
diff -urN /usr/share/empty/fs/aufs/poll.c linux/fs/aufs/poll.c
--- /usr/share/empty/fs/aufs/poll.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/poll.c 2018-08-12 23:43:05.460124736 +0200
++++ linux/fs/aufs/poll.c 2019-03-05 12:13:00.142557771 +0100
@@ -0,0 +1,51 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 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 2018-08-12 23:43:05.460124736 +0200
++++ linux/fs/aufs/posix_acl.c 2019-03-05 12:13:00.142557771 +0100
@@ -0,0 +1,103 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2014-2018 Junjiro R. Okajima
++ * Copyright (C) 2014-2019 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/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 2018-08-12 23:43:05.460124736 +0200
++++ linux/fs/aufs/procfs.c 2019-07-08 09:31:38.324384703 +0200
@@ -0,0 +1,171 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2010-2018 Junjiro R. Okajima
++ * Copyright (C) 2010-2019 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
+ hlist_bl_lock(&au_sbilist);
+ hlist_bl_for_each_entry(sbinfo, pos, &au_sbilist, si_list)
+ if (id == sysaufs_si_id(sbinfo)) {
-+ kobject_get(&sbinfo->si_kobj);
-+ sb = sbinfo->si_sb;
++ if (kobject_get_unless_zero(&sbinfo->si_kobj))
++ sb = sbinfo->si_sb;
+ break;
+ }
+ hlist_bl_unlock(&au_sbilist);
+}
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 2018-08-12 23:43:05.463458173 +0200
-@@ -0,0 +1,382 @@
++++ linux/fs/aufs/rdu.c 2019-03-05 12:13:00.142557771 +0100
+@@ -0,0 +1,384 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ struct file *h_file;
+ struct au_rdu_cookie *cookie = &rdu->cookie;
+
-+ err = !access_ok(VERIFY_WRITE, rdu->ent.e, rdu->sz);
++ /* VERIFY_WRITE */
++ err = !access_ok(rdu->ent.e, rdu->sz);
+ if (unlikely(err)) {
+ err = -EFAULT;
+ AuTraceErr(err);
+ /* unnecessary to support mmap_sem since this is a dir */
+ err = copy_from_user(&ent, u->e, sizeof(ent));
+ if (!err)
-+ err = !access_ok(VERIFY_WRITE, &u->e->ino, sizeof(ino));
++ /* VERIFY_WRITE */
++ err = !access_ok(&u->e->ino, sizeof(ino));
+ if (unlikely(err)) {
+ err = -EFAULT;
+ AuTraceErr(err);
+#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 2018-10-23 12:33:35.599375796 +0200
++++ linux/fs/aufs/rwsem.h 2019-03-05 12:13:00.142557771 +0100
@@ -0,0 +1,73 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 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_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 2018-10-23 12:33:35.599375796 +0200
-@@ -0,0 +1,313 @@
++++ linux/fs/aufs/sbinfo.c 2019-05-06 09:03:04.820143837 +0200
+@@ -0,0 +1,314 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 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
+ * superblock private data
+ */
+
++#include <linux/iversion.h>
+#include "aufs.h"
+
+/*
+ au_br_free(sbinfo);
+ au_rw_write_unlock(&sbinfo->si_rwsem);
+
-+ kfree(sbinfo->si_branch);
++ au_kfree_try_rcu(sbinfo->si_branch);
+ mutex_destroy(&sbinfo->si_xib_mtx);
+ AuRwDestroy(&sbinfo->si_rwsem);
+
+ au_lcnt_wait_for_fin(&sbinfo->si_ninodes);
+ /* si_nfiles is waited too */
-+ kfree(sbinfo);
++ au_kfree_rcu(sbinfo);
+}
+
+int au_si_alloc(struct super_block *sb)
+ return 0; /* success */
+
+out_br:
-+ kfree(sbinfo->si_branch);
++ au_kfree_try_rcu(sbinfo->si_branch);
+out_sbinfo:
-+ kfree(sbinfo);
++ au_kfree_rcu(sbinfo);
+out:
+ return err;
+}
+}
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 2018-10-23 12:33:35.599375796 +0200
-@@ -0,0 +1,1048 @@
++++ linux/fs/aufs/super.c 2019-05-06 09:03:04.820143837 +0200
+@@ -0,0 +1,1049 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 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 and super_block operations
+ */
+
++#include <linux/iversion.h>
+#include <linux/mm.h>
+#include <linux/seq_file.h>
+#include <linux/statfs.h>
+};
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 2018-10-23 12:33:35.599375796 +0200
++++ linux/fs/aufs/super.h 2019-03-05 12:13:00.142557771 +0100
@@ -0,0 +1,589 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 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_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 2018-08-12 23:43:05.463458173 +0200
++++ linux/fs/aufs/sysaufs.c 2019-03-05 12:13:00.142557771 +0100
@@ -0,0 +1,93 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+}
diff -urN /usr/share/empty/fs/aufs/sysaufs.h linux/fs/aufs/sysaufs.h
--- /usr/share/empty/fs/aufs/sysaufs.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/sysaufs.h 2018-08-12 23:43:05.463458173 +0200
++++ linux/fs/aufs/sysaufs.h 2019-03-05 12:13:00.142557771 +0100
@@ -0,0 +1,102 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 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 2018-08-12 23:43:05.463458173 +0200
-@@ -0,0 +1,373 @@
++++ linux/fs/aufs/sysfs.c 2019-03-05 12:13:00.142557771 +0100
+@@ -0,0 +1,374 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 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
+ if (unlikely(err == PAGE_SIZE))
+ err = -EFBIG;
+ }
-+ kfree(seq);
++ au_kfree_rcu(seq);
+out_unlock:
+ si_read_unlock(sb);
+out:
+
+ sz = sizeof(*arg) - offsetof(union aufs_brinfo, path);
+ for (bindex = 0; bindex <= bbot; bindex++, arg++) {
-+ err = !access_ok(VERIFY_WRITE, arg, sizeof(*arg));
++ /* VERIFY_WRITE */
++ err = !access_ok(arg, sizeof(*arg));
+ if (unlikely(err))
+ break;
+
+ err = -EFAULT;
+
+out_seq:
-+ kfree(seq);
++ au_kfree_rcu(seq);
+out_buf:
+ free_page((unsigned long)buf);
+out:
+}
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 2018-10-23 12:33:35.599375796 +0200
++++ linux/fs/aufs/sysrq.c 2019-03-05 12:13:00.142557771 +0100
@@ -0,0 +1,160 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 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 2018-10-23 12:33:35.599375796 +0200
-@@ -0,0 +1,895 @@
++++ linux/fs/aufs/vdir.c 2019-05-06 09:03:04.820143837 +0200
+@@ -0,0 +1,896 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 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
+ * virtual or vertical directory
+ */
+
++#include <linux/iversion.h>
+#include "aufs.h"
+
+static unsigned int calc_size(int nlen)
+ struct hlist_node *node;
+
+ hlist_for_each_entry_safe(pos, node, head, wh_hash)
-+ kfree(pos);
++ au_kfree_rcu(pos);
+}
+
+static void au_nhash_de_do_free(struct hlist_head *head)
+ nhash_count(head);
+ free(head++);
+ }
-+ kfree(nhash->nh_head);
++ au_kfree_try_rcu(nhash->nh_head);
+}
+
+void au_nhash_wh_free(struct au_nhash *whlist)
+
+ deblk = vdir->vd_deblk;
+ while (vdir->vd_nblk--)
-+ kfree(*deblk++);
-+ kfree(vdir->vd_deblk);
++ au_kfree_try_rcu(*deblk++);
++ au_kfree_try_rcu(vdir->vd_deblk);
+ au_cache_free_vdir(vdir);
+}
+
+ if (!err)
+ return vdir; /* success */
+
-+ kfree(vdir->vd_deblk);
++ au_kfree_try_rcu(vdir->vd_deblk);
+
+out_free:
+ au_cache_free_vdir(vdir);
+ union au_vdir_deblk_p p, deblk_end;
+
+ while (vdir->vd_nblk > 1) {
-+ kfree(vdir->vd_deblk[vdir->vd_nblk - 1]);
++ au_kfree_try_rcu(vdir->vd_deblk[vdir->vd_nblk - 1]);
+ /* vdir->vd_deblk[vdir->vd_nblk - 1] = NULL; */
+ vdir->vd_nblk--;
+ }
+}
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 2018-10-23 12:33:35.599375796 +0200
++++ linux/fs/aufs/vfsub.c 2019-03-05 12:13:00.145891204 +0100
@@ -0,0 +1,902 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 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.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 2018-10-23 12:33:35.599375796 +0200
-@@ -0,0 +1,355 @@
++++ linux/fs/aufs/vfsub.h 2019-05-06 09:03:04.820143837 +0200
+@@ -0,0 +1,354 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 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.h>
-+#include <linux/iversion.h>
+#include <linux/mount.h>
+#include <linux/posix_acl.h>
+#include <linux/xattr.h>
+ * re-use branch fs's ioctl(FICLONE) while aufs itself doesn't support such
+ * ioctl.
+ */
-+static inline int vfsub_clone_file_range(struct file *src, struct file *dst,
-+ u64 len)
++static inline loff_t vfsub_clone_file_range(struct file *src, struct file *dst,
++ loff_t len)
+{
-+ int err;
++ loff_t err;
+
+ lockdep_off();
-+ err = vfs_clone_file_range(src, 0, dst, 0, len);
++ err = vfs_clone_file_range(src, 0, dst, 0, len, /*remap_flags*/0);
+ 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 2018-08-12 23:43:05.463458173 +0200
++++ linux/fs/aufs/wbr_policy.c 2019-03-05 12:13:00.145891204 +0100
@@ -0,0 +1,830 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 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
+
+ mfs->mfsrr_bytes = bavail;
+ AuDbg("b%d\n", mfs->mfs_bindex);
-+ kfree(st);
++ au_kfree_rcu(st);
+}
+
+static int au_wbr_create_mfs(struct dentry *dentry, unsigned int flags)
+};
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 2018-10-23 12:33:35.599375796 +0200
++++ linux/fs/aufs/whout.c 2019-03-05 12:13:00.145891204 +0100
@@ -0,0 +1,1062 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+
+out_name:
+ if (name != defname)
-+ kfree(name);
++ au_kfree_try_rcu(name);
+out:
+ AuTraceErrPtr(dentry);
+ return dentry;
+ au_lcnt_dec(&a->br->br_count);
+ si_write_unlock(a->sb);
+ au_nwt_done(&au_sbi(a->sb)->si_nowait);
-+ kfree(arg);
++ au_kfree_rcu(a);
+ if (unlikely(err))
+ AuIOErr("err %d\n", err);
+}
+ if (unlikely(wkq_err)) {
+ atomic_dec(&br->br_wbr->wbr_wh_running);
+ au_lcnt_dec(&br->br_count);
-+ kfree(arg);
++ au_kfree_rcu(arg);
+ }
+ do_dec = 0;
+ }
+ wh_dentry = ERR_PTR(err);
+ if (!err) {
+ wh_dentry = vfsub_lkup_one(&wh_name, h_parent);
-+ kfree(wh_name.name);
++ au_kfree_try_rcu(wh_name.name);
+ }
+ return wh_dentry;
+}
+ rdhash = AUFS_RDHASH_DEF;
+ err = au_nhash_alloc(&whtmp->whlist, rdhash, gfp);
+ if (unlikely(err)) {
-+ kfree(whtmp);
++ au_kfree_rcu(whtmp);
+ whtmp = ERR_PTR(err);
+ }
+
+ dput(whtmp->wh_dentry);
+ iput(whtmp->dir);
+ au_nhash_wh_free(&whtmp->whlist);
-+ kfree(whtmp);
++ au_kfree_rcu(whtmp);
+}
+
+/*
+}
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 2018-08-12 23:43:05.463458173 +0200
++++ linux/fs/aufs/whout.h 2019-03-05 12:13:00.145891204 +0100
@@ -0,0 +1,86 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 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_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 2018-10-23 12:33:35.599375796 +0200
++++ linux/fs/aufs/wkq.c 2019-03-05 12:13:00.145891204 +0100
@@ -0,0 +1,392 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+
+static void au_wkq_lockdep_free(struct au_wkinfo *wkinfo)
+{
-+ kfree(wkinfo->hlock);
++ au_kfree_try_rcu(wkinfo->hlock);
+}
+
+static void au_wkq_lockdep_pre(struct au_wkinfo *wkinfo)
+ else {
+ kobject_put(wkinfo->kobj);
+ module_put(THIS_MODULE); /* todo: ?? */
-+ kfree(wkinfo);
++ au_kfree_rcu(wkinfo);
+ }
+}
+
+
+static void au_wkq_comp_free(struct completion *comp)
+{
-+ kfree(comp);
++ au_kfree_rcu(comp);
+}
+
+#else
+}
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 2018-10-23 12:33:35.599375796 +0200
++++ linux/fs/aufs/wkq.h 2019-03-05 12:13:00.145891204 +0100
@@ -0,0 +1,89 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 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 2018-08-12 23:43:05.466791610 +0200
++++ linux/fs/aufs/xattr.c 2019-03-05 12:13:00.145891204 +0100
@@ -0,0 +1,356 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2014-2018 Junjiro R. Okajima
++ * Copyright (C) 2014-2019 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
+ AuTraceErr(err);
+ }
+
-+ kfree(value);
++ au_kfree_try_rcu(value);
+
+out_free:
-+ kfree(o);
++ au_kfree_try_rcu(o);
+out:
+ if (!unlocked)
+ inode_unlock_shared(h_isrc);
+}
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 2018-10-23 12:33:35.599375796 +0200
-@@ -0,0 +1,1890 @@
++++ linux/fs/aufs/xino.c 2019-07-08 09:31:38.327718137 +0200
+@@ -0,0 +1,1965 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 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
+/*
+ * create and set a new xino file
+ */
-+struct file *au_xino_create(struct super_block *sb, char *fpath, int silent)
++struct file *au_xino_create(struct super_block *sb, char *fpath, int silent,
++ int wbrtop)
+{
+ struct file *file;
+ struct dentry *h_parent, *d;
+ struct inode *h_dir, *inode;
+ int err;
++ static DEFINE_MUTEX(mtx);
+
+ /*
+ * at mount-time, and the xino file is the default path,
+ * hnotify is disabled so we have no notify events to ignore.
+ * when a user specified the xino, we cannot get au_hdir to be ignored.
+ */
++ if (!wbrtop)
++ mutex_lock(&mtx);
+ file = vfsub_filp_open(fpath, O_RDWR | O_CREAT | O_EXCL | O_LARGEFILE
+ /* | __FMODE_NONOTIFY */,
+ 0666);
+ if (IS_ERR(file)) {
++ if (!wbrtop)
++ mutex_unlock(&mtx);
+ if (!silent)
+ pr_err("open %s(%ld)\n", fpath, PTR_ERR(file));
+ return file;
+ err = 0;
+ d = file->f_path.dentry;
+ h_parent = au_dget_parent_lock(d, AuLsc_I_PARENT);
++ if (!wbrtop)
++ mutex_unlock(&mtx);
+ /* mnt_want_write() is unnecessary here */
+ h_dir = d_inode(h_parent);
+ inode = file_inode(file);
+ au_sbi(sb)->si_xino_jiffy = jiffy;
+
+out_st:
-+ kfree(st);
++ au_kfree_rcu(st);
+out:
+ return err;
+}
+ au_lcnt_dec(&br->br_count);
+ si_write_unlock(sb);
+ au_nwt_done(&au_sbi(sb)->si_nowait);
-+ kfree(args);
++ au_kfree_rcu(args);
+}
+
+/*
+
+ pr_err("wkq %d\n", wkq_err);
+ au_lcnt_dec(&br->br_count);
-+ kfree(args);
++ au_kfree_rcu(args);
+
+out:
+ atomic_dec(&br->br_xino->xi_truncating);
+ ino_t ino;
+};
+
++struct au_xi_writing {
++ struct hlist_bl_node node;
++ 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);
+
+ struct au_sbinfo *sbi;
+ struct inode *root;
+ struct file *file;
++ struct au_xi_writing *del, *p;
++ struct hlist_bl_head *hbl;
++ struct hlist_bl_node *pos;
+ int err;
+
+ br = a->br;
+ root = d_inode(sb->s_root);
+ ii_read_lock_child(root);
+ err = au_xino_do_new_async(sb, br, &a->calc);
-+ if (!err) {
-+ file = au_xino_file(br->br_xino, a->calc.idx);
-+ if (file)
-+ err = au_xino_do_write(sbi->si_xwrite, file, &a->calc,
-+ a->ino);
-+ if (unlikely(err))
-+ AuIOErr("err %d\n", err);
-+ } else
++ if (unlikely(err)) {
++ AuIOErr("err %d\n", err);
++ goto out;
++ }
++
++ 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);
++ if (unlikely(err)) {
+ AuIOErr("err %d\n", err);
++ goto out;
++ }
++
++ del = NULL;
++ hbl = &br->br_xino->xi_writing;
++ hlist_bl_lock(hbl);
++ au_hbl_for_each(pos, hbl) {
++ p = container_of(pos, struct au_xi_writing, node);
++ if (p->ino == a->ino) {
++ del = p;
++ hlist_bl_del(&p->node);
++ break;
++ }
++ }
++ hlist_bl_unlock(hbl);
++ au_kfree_rcu(del);
++
++out:
+ au_lcnt_dec(&br->br_count);
+ ii_read_unlock(root);
+ si_read_unlock(sb);
+ au_nwt_done(&sbi->si_nowait);
-+ kfree(args);
++ au_kfree_rcu(a);
+}
+
+/*
+ if (unlikely(err)) {
+ pr_err("wkq %d\n", err);
+ au_lcnt_dec(&br->br_count);
-+ kfree(arg);
++ au_kfree_rcu(arg);
+ }
+
+out:
+ struct au_xi_calc calc;
+ struct au_sbinfo *sbinfo;
+ struct file *file;
++ struct au_xino *xi;
++ struct hlist_bl_head *hbl;
++ struct hlist_bl_node *pos;
++ struct au_xi_writing *p;
+
+ *ino = 0;
+ if (!au_opt_test(au_mntflags(sb), XINO))
+
+ err = 0;
+ au_xi_calc(sb, h_ino, &calc);
-+ file = au_xino_file(au_sbr(sb, bindex)->br_xino, calc.idx);
-+ if (!file
-+ || vfsub_f_size_read(file) < calc.pos + sizeof(*ino))
-+ return 0; /* no ino */
++ xi = au_sbr(sb, bindex)->br_xino;
++ file = au_xino_file(xi, calc.idx);
++ if (!file) {
++ hbl = &xi->xi_writing;
++ hlist_bl_lock(hbl);
++ au_hbl_for_each(pos, hbl) {
++ p = container_of(pos, struct au_xi_writing, node);
++ if (p->h_ino == h_ino) {
++ AuDbg("hi%llu, i%llu, found\n",
++ (u64)p->h_ino, (u64)p->ino);
++ *ino = p->ino;
++ break;
++ }
++ }
++ hlist_bl_unlock(hbl);
++ return 0;
++ } else if (vfsub_f_size_read(file) < calc.pos + sizeof(*ino))
++ return 0; /* no xino */
+
+ sbinfo = au_sbi(sb);
+ sz = xino_fread(sbinfo->si_xread, file, ino, sizeof(*ino), &calc.pos);
+ struct file *file;
+ struct au_branch *br;
+ struct au_xino *xi;
++ struct au_xi_writing *p;
+
+ SiMustAnyLock(sb);
+
+ xi = br->br_xino;
+ file = au_xino_file(xi, calc.idx);
+ if (!file) {
++ /* store the inum pair into the list */
++ p = kmalloc(sizeof(*p), GFP_NOFS | __GFP_NOFAIL);
++ p->h_ino = h_ino;
++ p->ino = ino;
++ au_hbl_add(&p->node, &xi->xi_writing);
++
+ /* create and write a new xino file asynchronously */
+ err = au_xino_new_async(sb, br, &calc, ino);
+ if (!err)
+ spin_lock_init(&xi->xi_nondir.spin);
+ init_waitqueue_head(&xi->xi_nondir.wqh);
+ mutex_init(&xi->xi_mtx);
-+ /* init_waitqueue_head(&xi->xi_wq); */
-+ /* atomic_set(&xi->xi_pending, 0); */
++ INIT_HLIST_BL_HEAD(&xi->xi_writing);
+ atomic_set(&xi->xi_truncating, 0);
+ kref_init(&xi->xi_kref);
+ goto out; /* success */
+
+out_file:
-+ kfree(xi->xi_file);
++ au_kfree_try_rcu(xi->xi_file);
+out_free:
-+ kfree(xi);
++ au_kfree_rcu(xi);
+ xi = NULL;
+out:
+ return xi;
+{
+ struct au_xino *xi;
+ int i;
++ unsigned long ul;
++ struct hlist_bl_head *hbl;
++ struct hlist_bl_node *pos, *n;
++ struct au_xi_writing *p;
+
+ xi = container_of(kref, struct au_xino, xi_kref);
+ for (i = 0; i < xi->xi_nfile; i++)
+ for (i = xi->xi_nondir.total - 1; i >= 0; i--)
+ AuDebugOn(xi->xi_nondir.array[i]);
+ mutex_destroy(&xi->xi_mtx);
-+ kfree(xi->xi_file);
-+ kfree(xi->xi_nondir.array);
-+ kfree(xi);
++ hbl = &xi->xi_writing;
++ ul = au_hbl_count(hbl);
++ if (unlikely(ul)) {
++ pr_warn("xi_writing %lu\n", ul);
++ hlist_bl_lock(hbl);
++ hlist_bl_for_each_entry_safe (p, pos, n, hbl, node) {
++ hlist_bl_del(&p->node);
++ au_kfree_rcu(p);
++ }
++ hlist_bl_unlock(hbl);
++ }
++ au_kfree_try_rcu(xi->xi_file);
++ au_kfree_try_rcu(xi->xi_nondir.array);
++ au_kfree_rcu(xi);
+}
+
+int au_xino_put(struct au_branch *br)
+ if (!IS_ERR(p)) {
+ strcat(p, "/" AUFS_XINO_FNAME);
+ AuDbg("%s\n", p);
-+ file = au_xino_create(sb, p, /*silent*/0);
++ file = au_xino_create(sb, p, /*silent*/0, /*wbrtop*/1);
+ }
+ free_page((unsigned long)page);
+ } else {
-+ file = au_xino_create(sb, AUFS_XINO_DEFPATH, /*silent*/0);
++ file = au_xino_create(sb, AUFS_XINO_DEFPATH, /*silent*/0,
++ /*wbrtop*/0);
+ if (IS_ERR(file))
+ goto out;
+ h_sb = file->f_path.dentry->d_sb;
+}
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 2018-10-23 12:33:35.602709228 +0200
++++ linux/include/uapi/linux/aufs_type.h 2019-07-08 09:31:38.327718137 +0200
@@ -0,0 +1,448 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2018 Junjiro R. Okajima
++ * Copyright (C) 2005-2019 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/limits.h>
+
-+#define AUFS_VERSION "4.x-rcN-20181022"
++#define AUFS_VERSION "4.x-rcN-20190610"
+
+/* todo? move this to linux-2.6.19/include/magic.h */
+#define AUFS_SUPER_MAGIC ('a' << 24 | 'u' << 16 | 'f' << 8 | 's')
aufs4.x-rcN loopback patch
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
-index 9e534a3..74cd74e 100644
+index a271e17e4b10..ee17c7577224 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
-@@ -626,6 +626,15 @@ static inline void loop_update_dio(struct loop_device *lo)
+@@ -625,6 +625,15 @@ static inline void loop_update_dio(struct loop_device *lo)
lo->use_dio);
}
static void loop_reread_partitions(struct loop_device *lo,
struct block_device *bdev)
{
-@@ -690,6 +699,7 @@ static int loop_change_fd(struct loop_device *lo, struct block_device *bdev,
+@@ -678,6 +687,7 @@ static int loop_change_fd(struct loop_device *lo, struct block_device *bdev,
unsigned int arg)
{
- struct file *file, *old_file;
+ struct file *file = NULL, *old_file;
+ struct file *f, *virt_file = NULL, *old_virt_file;
int error;
+ bool partscan;
- error = -ENXIO;
-@@ -705,12 +715,19 @@ static int loop_change_fd(struct loop_device *lo, struct block_device *bdev,
+@@ -697,12 +707,19 @@ static int loop_change_fd(struct loop_device *lo, struct block_device *bdev,
file = fget(arg);
if (!file)
- goto out;
+ goto out_err;
+ f = loop_real_file(file);
+ if (f) {
+ virt_file = file;
error = loop_validate_file(file, bdev);
if (error)
- goto out_putf;
+ goto out_err;
old_file = lo->lo_backing_file;
+ old_virt_file = lo->lo_backing_virt_file;
error = -EINVAL;
-@@ -722,6 +739,7 @@ static int loop_change_fd(struct loop_device *lo, struct block_device *bdev,
+@@ -714,6 +731,7 @@ 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));
-@@ -729,12 +747,16 @@ static int loop_change_fd(struct loop_device *lo, struct block_device *bdev,
- blk_mq_unfreeze_queue(lo->lo_queue);
-
+@@ -727,6 +745,8 @@ 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 (lo->lo_flags & LO_FLAGS_PARTSCAN)
+ if (partscan)
loop_reread_partitions(lo, bdev);
return 0;
-
- out_putf:
- fput(file);
+@@ -735,6 +755,8 @@ static int loop_change_fd(struct loop_device *lo, struct block_device *bdev,
+ mutex_unlock(&loop_ctl_mutex);
+ if (file)
+ fput(file);
+ if (virt_file)
+ fput(virt_file);
- out:
return error;
}
-@@ -922,7 +944,7 @@ static int loop_prepare_queue(struct loop_device *lo)
+
+@@ -921,7 +943,7 @@ static int loop_prepare_queue(struct loop_device *lo)
static int loop_set_fd(struct loop_device *lo, fmode_t mode,
struct block_device *bdev, unsigned int arg)
{
+ get_file(file);
+ }
- error = -EBUSY;
- if (lo->lo_state != Lo_unbound)
-@@ -968,6 +996,7 @@ static int loop_set_fd(struct loop_device *lo, fmode_t mode,
+ error = mutex_lock_killable(&loop_ctl_mutex);
+ if (error)
+@@ -972,6 +1000,7 @@ static int loop_set_fd(struct loop_device *lo, fmode_t mode,
lo->lo_device = bdev;
lo->lo_flags = lo_flags;
lo->lo_backing_file = file;
lo->transfer = NULL;
lo->ioctl = NULL;
lo->lo_sizelimit = 0;
-@@ -1001,6 +1030,8 @@ static int loop_set_fd(struct loop_device *lo, fmode_t mode,
-
- out_putf:
+@@ -1009,6 +1038,8 @@ static int loop_set_fd(struct loop_device *lo, fmode_t mode,
+ mutex_unlock(&loop_ctl_mutex);
+ out_putf:
fput(file);
+ if (virt_file)
+ fput(virt_file);
- out:
+ out:
/* This is safe: open() is still holding a reference. */
module_put(THIS_MODULE);
-@@ -1047,6 +1078,7 @@ loop_init_xfer(struct loop_device *lo, struct loop_func_table *xfer,
- static int loop_clr_fd(struct loop_device *lo)
+@@ -1055,6 +1086,7 @@ loop_init_xfer(struct loop_device *lo, struct loop_func_table *xfer,
+ static int __loop_clr_fd(struct loop_device *lo, bool release)
{
- struct file *filp = lo->lo_backing_file;
+ struct file *filp = NULL;
+ 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;
+@@ -1078,6 +1110,7 @@ static int __loop_clr_fd(struct loop_device *lo, bool release)
-@@ -1078,6 +1110,7 @@ static int loop_clr_fd(struct loop_device *lo)
spin_lock_irq(&lo->lo_lock);
- lo->lo_state = Lo_rundown;
lo->lo_backing_file = NULL;
+ lo->lo_backing_virt_file = NULL;
spin_unlock_irq(&lo->lo_lock);
loop_release_xfer(lo);
-@@ -1126,6 +1159,8 @@ static int loop_clr_fd(struct loop_device *lo)
- * bd_mutex which is usually taken before lo_ctl_mutex.
+@@ -1146,6 +1179,8 @@ static int __loop_clr_fd(struct loop_device *lo, bool release)
*/
- fput(filp);
+ if (filp)
+ fput(filp);
+ if (virt_filp)
+ fput(virt_filp);
- return 0;
+ return err;
}
diff --git a/drivers/block/loop.h b/drivers/block/loop.h
-index 4d42c7a..a4974ee 100644
+index af75a5ee4094..1e6ee5a4f623 100644
--- a/drivers/block/loop.h
+++ b/drivers/block/loop.h
@@ -46,7 +46,7 @@ struct loop_device {
void *key_data;
diff --git a/fs/aufs/f_op.c b/fs/aufs/f_op.c
-index 5309874..1a334cf 100644
+index 0309f0d502ff..19feb4f3cb5f 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)
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 3d84349..a642de5 100644
+index f05887d612fd..6f0505723cb4 100644
--- a/fs/aufs/loop.c
+++ b/fs/aufs/loop.c
@@ -133,3 +133,19 @@ void au_loopback_fin(void)
symbol_put(loop_backing_file);
- kfree(au_warn_loopback_array);
+ au_kfree_try_rcu(au_warn_loopback_array);
}
+
+/* ---------------------------------------------------------------------- */
+ return f;
+}
diff --git a/fs/aufs/loop.h b/fs/aufs/loop.h
-index 05d703d..6bb23c8 100644
+index f31e40aff267..e13fb1a0717a 100644
--- a/fs/aufs/loop.h
+++ b/fs/aufs/loop.h
-@@ -26,7 +26,11 @@ void au_warn_loopback(struct super_block *h_sb);
+@@ -26,6 +26,8 @@ void au_warn_loopback(struct super_block *h_sb);
int au_loopback_init(void);
void au_loopback_fin(void);
+
+struct file *aufs_real_loop(struct file *file);
#else
-+AuStub(struct file *, loop_backing_file, return NULL)
-+
- AuStubInt0(au_test_loopback_overlap, struct super_block *sb,
- struct dentry *h_adding)
- AuStubInt0(au_test_loopback_kthread, void)
-@@ -34,6 +38,8 @@ AuStubVoid(au_warn_loopback, struct super_block *h_sb)
+ AuStub(struct file *, loop_backing_file, return NULL, struct super_block *sb)
+
+@@ -36,6 +38,8 @@ AuStubVoid(au_warn_loopback, struct super_block *h_sb)
AuStubInt0(au_loopback_init, void)
AuStubVoid(au_loopback_fin, void)
#endif /* __KERNEL__ */
diff --git a/fs/aufs/super.c b/fs/aufs/super.c
-index 777503e..7130061 100644
+index 73255f63b80c..f04e211cbf89 100644
--- a/fs/aufs/super.c
+++ b/fs/aufs/super.c
-@@ -845,7 +845,10 @@ static const struct super_operations aufs_sop = {
+@@ -846,7 +846,10 @@ static const struct super_operations aufs_sop = {
.statfs = aufs_statfs,
.put_super = aufs_put_super,
.sync_fs = aufs_sync_fs,
/* ---------------------------------------------------------------------- */
diff --git a/include/linux/fs.h b/include/linux/fs.h
-index 7fb92a9..cff3ca3 100644
+index 5db265e7d35a..8895cd2343e3 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
-@@ -1882,6 +1882,10 @@ struct super_operations {
+@@ -1937,6 +1937,10 @@ struct super_operations {
struct shrink_control *);
long (*free_cached_objects)(struct super_block *,
struct shrink_control *);
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