-aufs4.11.7+ kbuild patch
+SPDX-License-Identifier: GPL-2.0
+aufs4.x-rcN kbuild patch
diff --git a/fs/Kconfig b/fs/Kconfig
-index 83eab52..31f16c4 100644
+index ac474a6..284cee9 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
-@@ -248,6 +248,7 @@ source "fs/pstore/Kconfig"
+@@ -255,6 +255,7 @@ source "fs/pstore/Kconfig"
source "fs/sysv/Kconfig"
source "fs/ufs/Kconfig"
source "fs/exofs/Kconfig"
endif # MISC_FILESYSTEMS
diff --git a/fs/Makefile b/fs/Makefile
-index 7bbaca9..a026491 100644
+index 293733f..12d19d0 100644
--- a/fs/Makefile
+++ b/fs/Makefile
@@ -128,3 +128,4 @@ obj-y += exofs/ # Multiple modules
obj-$(CONFIG_PSTORE) += pstore/
obj-$(CONFIG_EFIVAR_FS) += efivarfs/
+obj-$(CONFIG_AUFS_FS) += aufs/
-diff --git a/include/uapi/linux/Kbuild b/include/uapi/linux/Kbuild
-index f8d9fed..902305e 100644
---- a/include/uapi/linux/Kbuild
-+++ b/include/uapi/linux/Kbuild
-@@ -59,6 +59,7 @@ header-y += atmsvc.h
- header-y += atm_tcp.h
- header-y += atm_zatm.h
- header-y += audit.h
-+header-y += aufs_type.h
- header-y += auto_fs4.h
- header-y += auto_fs.h
- header-y += auxvec.h
-aufs4.11.7+ base patch
+SPDX-License-Identifier: GPL-2.0
+aufs4.x-rcN base patch
diff --git a/MAINTAINERS b/MAINTAINERS
-index 38d3e4e..c2b31bf 100644
+index 0fe4228..52cedab 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
-@@ -2319,6 +2319,19 @@ F: include/linux/audit.h
+@@ -2541,6 +2541,19 @@ F: include/linux/audit.h
F: include/uapi/linux/audit.h
F: kernel/audit*
+
AUXILIARY DISPLAY DRIVERS
M: Miguel Ojeda Sandonis <miguel.ojeda.sandonis@gmail.com>
- W: http://miguelojeda.es/auxdisplay.htm
+ S: Maintained
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
-index 0ecb646..cf39138 100644
+index 4cb1d1b..5678bf8 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
-@@ -701,6 +701,24 @@ static inline int is_loop_device(struct file *file)
- return i && S_ISBLK(i->i_mode) && MAJOR(i->i_rdev) == LOOP_MAJOR;
+@@ -741,6 +741,24 @@ 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 95d71ed..8ca5f09 100644
+index 0e8e5de..88de3b6 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
-@@ -1164,7 +1164,7 @@ enum d_walk_ret {
+@@ -1240,7 +1240,7 @@ enum d_walk_ret {
*
- * The @enter() and @finish() callbacks are called with d_lock held.
+ * The @enter() callbacks are called with d_lock held.
*/
-static void d_walk(struct dentry *parent, void *data,
+void d_walk(struct dentry *parent, void *data,
- enum d_walk_ret (*enter)(void *, struct dentry *),
- void (*finish)(void *))
+ enum d_walk_ret (*enter)(void *, struct dentry *))
{
+ struct dentry *this_parent;
diff --git a/fs/fcntl.c b/fs/fcntl.c
-index be8fbe2..f5f4f94 100644
+index 12273b6..545e686 100644
--- a/fs/fcntl.c
+++ b/fs/fcntl.c
-@@ -30,7 +30,7 @@
+@@ -32,7 +32,7 @@
#define SETFL_MASK (O_APPEND | O_NONBLOCK | O_NDELAY | O_DIRECT | O_NOATIME)
{
struct inode * inode = file_inode(filp);
int error = 0;
-@@ -61,6 +61,8 @@ static int setfl(int fd, struct file * filp, unsigned long arg)
+@@ -63,6 +63,8 @@ static int setfl(int fd, struct file * filp, unsigned long arg)
if (filp->f_op->check_flags)
error = filp->f_op->check_flags(arg);
return error;
diff --git a/fs/inode.c b/fs/inode.c
-index 88110fd..9a9ba3a 100644
+index 8c86c80..af894e7 100644
--- a/fs/inode.c
+++ b/fs/inode.c
-@@ -1642,7 +1642,7 @@ EXPORT_SYMBOL(generic_update_time);
+@@ -1649,7 +1649,7 @@ EXPORT_SYMBOL(generic_update_time);
* This does the actual work of updating an inodes time or version. Must have
* had called mnt_want_write() before calling this.
*/
--static int update_time(struct inode *inode, struct timespec *time, int flags)
-+int update_time(struct inode *inode, struct timespec *time, int flags)
+-static int update_time(struct inode *inode, struct timespec64 *time, int flags)
++int update_time(struct inode *inode, struct timespec64 *time, int flags)
{
- int (*update_time)(struct inode *, struct timespec *, int);
+ int (*update_time)(struct inode *, struct timespec64 *, int);
+
+diff --git a/fs/namespace.c b/fs/namespace.c
+index 8ddd148..ee649e0 100644
+--- a/fs/namespace.c
++++ b/fs/namespace.c
+@@ -846,6 +846,12 @@ static inline int check_mnt(struct mount *mnt)
+ return mnt->mnt_ns == current->nsproxy->mnt_ns;
+ }
++/* for aufs, CONFIG_AUFS_BR_FUSE */
++int is_current_mnt_ns(struct vfsmount *mnt)
++{
++ return check_mnt(real_mount(mnt));
++}
++
+ /*
+ * vfsmount lock must be held for write
+ */
diff --git a/fs/read_write.c b/fs/read_write.c
-index f77eb22..eba4e7e 100644
+index 153f8f6..ccc5bc8 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
-@@ -513,6 +513,28 @@ ssize_t __vfs_write(struct file *file, const char __user *p, size_t count,
+@@ -489,6 +489,28 @@ ssize_t __vfs_write(struct file *file, const char __user *p, size_t count,
+ return -EINVAL;
}
- EXPORT_SYMBOL(__vfs_write);
+vfs_readf_t vfs_readf(struct file *file)
+{
+ return ERR_PTR(-ENOSYS);
+}
+
- ssize_t __kernel_write(struct file *file, const char *buf, size_t count, loff_t *pos)
+ ssize_t __kernel_write(struct file *file, const void *buf, size_t count, loff_t *pos)
{
mm_segment_t old_fs;
diff --git a/fs/splice.c b/fs/splice.c
-index 006ba50..46c87af 100644
+index b3daa97..1dd7f96 100644
--- a/fs/splice.c
+++ b/fs/splice.c
-@@ -859,8 +859,8 @@ EXPORT_SYMBOL(generic_splice_sendpage);
+@@ -838,8 +838,8 @@ 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);
-@@ -876,9 +876,9 @@ static long do_splice_from(struct pipe_inode_info *pipe, struct file *out,
+@@ -855,9 +855,9 @@ 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 11ba023..abf6a5d 100644
+index b54e054..2860782 100644
--- a/fs/sync.c
+++ b/fs/sync.c
-@@ -27,7 +27,7 @@
+@@ -28,7 +28,7 @@
* wait == 1 case since in that case write_inode() functions do
* sync_dirty_buffer() and thus effectively write one block at a time.
*/
if (wait)
sync_inodes_sb(sb);
diff --git a/include/linux/file.h b/include/linux/file.h
-index 61eb82c..e700888 100644
+index 279720d..76e38ea 100644
--- a/include/linux/file.h
+++ b/include/linux/file.h
-@@ -19,6 +19,7 @@ struct dentry;
+@@ -20,6 +20,7 @@ struct dentry;
struct path;
extern struct file *alloc_file(const struct path *, fmode_t mode,
const struct file_operations *fop);
static inline void fput_light(struct file *file, int fput_needed)
{
diff --git a/include/linux/fs.h b/include/linux/fs.h
-index 7415630..433e314 100644
+index 805bf22..0d0d247f 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
-@@ -1246,6 +1246,7 @@ extern void fasync_free(struct fasync_struct *);
+@@ -1273,6 +1273,7 @@ extern void fasync_free(struct fasync_struct *);
/* can be called from interrupts */
extern void kill_fasync(struct fasync_struct **, int, int);
+extern int setfl(int fd, struct file * filp, unsigned long arg);
extern void __f_setown(struct file *filp, struct pid *, enum pid_type, int force);
- extern void f_setown(struct file *filp, unsigned long arg, int force);
+ extern int f_setown(struct file *filp, unsigned long arg, int force);
extern void f_delown(struct file *filp);
-@@ -1673,6 +1674,7 @@ struct file_operations {
+@@ -1733,6 +1734,7 @@ 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);
-@@ -1749,6 +1751,12 @@ ssize_t rw_copy_check_uvector(int type, const struct iovec __user * uvector,
+@@ -1803,6 +1805,12 @@ ssize_t rw_copy_check_uvector(int type, const struct iovec __user * uvector,
struct iovec *fast_pointer,
struct iovec **ret_pointer);
+vfs_writef_t vfs_writef(struct file *file);
+
extern ssize_t __vfs_read(struct file *, char __user *, size_t, loff_t *);
- extern ssize_t __vfs_write(struct file *, const char __user *, size_t, loff_t *);
extern ssize_t vfs_read(struct file *, char __user *, size_t, loff_t *);
-@@ -2127,6 +2135,7 @@ extern int current_umask(void);
+ extern ssize_t vfs_write(struct file *, const char __user *, size_t, loff_t *);
+@@ -2218,6 +2226,7 @@ extern int current_umask(void);
extern void ihold(struct inode * inode);
extern void iput(struct inode *);
- extern int generic_update_time(struct inode *, struct timespec *, int);
-+extern int update_time(struct inode *, struct timespec *, int);
+ extern int generic_update_time(struct inode *, struct timespec64 *, int);
++extern int update_time(struct inode *, struct timespec64 *, int);
/* /sys/fs */
extern struct kobject *fs_kobj;
-@@ -2407,6 +2416,7 @@ static inline bool sb_is_blkdev_sb(struct super_block *sb)
+@@ -2505,6 +2514,7 @@ static inline bool sb_is_blkdev_sb(struct super_block *sb)
return false;
}
#endif
extern int sync_filesystem(struct super_block *);
extern const struct file_operations def_blk_fops;
extern const struct file_operations def_chr_fops;
+diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h
+index 6fc77d4..27e76f0 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,
+ return lock->key == key;
+ }
+
++struct lock_class *lockdep_hlock_class(struct held_lock *hlock);
++
+ /*
+ * Acquire a lock.
+ *
+@@ -439,6 +441,7 @@ struct lockdep_map { };
+
+ #define lockdep_depth(tsk) (0)
+
++#define lockdep_is_held(lock) (1)
+ #define lockdep_is_held_type(l, r) (1)
+
+ #define lockdep_assert_held(l) do { (void)(l); } while (0)
+diff --git a/include/linux/mnt_namespace.h b/include/linux/mnt_namespace.h
+index 3594208..24f5fd1 100644
+--- a/include/linux/mnt_namespace.h
++++ b/include/linux/mnt_namespace.h
+@@ -6,11 +6,14 @@
+ struct mnt_namespace;
+ struct fs_struct;
+ struct user_namespace;
++struct vfsmount;
+
+ extern struct mnt_namespace *copy_mnt_ns(unsigned long, struct mnt_namespace *,
+ struct user_namespace *, struct fs_struct *);
+ extern void put_mnt_ns(struct mnt_namespace *ns);
+
++extern int is_current_mnt_ns(struct vfsmount *mnt);
++
+ extern const struct file_operations proc_mounts_operations;
+ 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 00a2116..1f0a4a2 100644
+index 74b4911..19789fb 100644
--- a/include/linux/splice.h
+++ b/include/linux/splice.h
-@@ -86,4 +86,10 @@ extern void spd_release_page(struct splice_pipe_desc *, unsigned int);
+@@ -87,4 +87,10 @@ extern void splice_shrink_spd(struct splice_pipe_desc *);
extern const struct pipe_buf_operations page_cache_pipe_buf_ops;
extern const struct pipe_buf_operations default_pipe_buf_ops;
+ struct pipe_inode_info *pipe, size_t len,
+ unsigned int flags);
#endif
-aufs4.11.7+ mmap patch
+diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c
+index 5fa4d31..720f070 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];
+
+-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)
+ }
+ return lock_classes + hlock->class_idx - 1;
+ }
++#define hlock_class(hlock) lockdep_hlock_class(hlock)
+
+ #ifdef CONFIG_LOCK_STAT
+ static DEFINE_PER_CPU(struct lock_class_stats[MAX_LOCKDEP_KEYS], cpu_lock_stats);
+SPDX-License-Identifier: GPL-2.0
+aufs4.x-rcN mmap patch
diff --git a/fs/proc/base.c b/fs/proc/base.c
-index c87b6b9..6b71643 100644
+index aaffc0c..ab72941 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
-@@ -1946,7 +1946,7 @@ static int map_files_get_link(struct dentry *dentry, struct path *path)
+@@ -2004,7 +2004,7 @@ 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 7563437..7c0dc0f 100644
+index 3b63be6..fb9913b 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 f401682..79ea96a 100644
+index dfd73a4..ed2ce10 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
-@@ -292,7 +292,10 @@ show_map_vma(struct seq_file *m, struct vm_area_struct *vma, int is_pid)
+@@ -306,7 +306,10 @@ show_map_vma(struct seq_file *m, struct vm_area_struct *vma, int is_pid)
const char *name = NULL;
if (file) {
dev = inode->i_sb->s_dev;
ino = inode->i_ino;
pgoff = ((loff_t)vma->vm_pgoff) << PAGE_SHIFT;
-@@ -1632,7 +1635,7 @@ static int show_numa_map(struct seq_file *m, void *v, int is_pid)
+@@ -1734,7 +1737,7 @@ static int show_numa_map(struct seq_file *m, void *v, int is_pid)
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 23266694..58e59b6 100644
+index 5b62f57..dfb4a3b 100644
--- a/fs/proc/task_nommu.c
+++ b/fs/proc/task_nommu.c
-@@ -157,7 +157,10 @@ static int nommu_vma_show(struct seq_file *m, struct vm_area_struct *vma,
+@@ -156,7 +156,10 @@ static int nommu_vma_show(struct seq_file *m, struct vm_area_struct *vma,
file = vma->vm_file;
if (file) {
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 cec423b..b6b2f901 100644
+index d3a3842..c4664f2 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
-@@ -1294,6 +1294,28 @@ static inline int fixup_user_fault(struct task_struct *tsk,
+@@ -1431,6 +1431,28 @@ static inline void unmap_shared_mapping_range(struct address_space *mapping,
+ unmap_mapping_range(mapping, holebegin, holelen, 0);
}
- #endif
+extern void vma_do_file_update_time(struct vm_area_struct *, const char[], int);
+extern struct file *vma_do_pr_or_file(struct vm_area_struct *, const char[],
+#define vmr_fput(region) vmr_do_fput(region, __func__, __LINE__)
+#endif /* !CONFIG_MMU */
+
- extern int access_process_vm(struct task_struct *tsk, unsigned long addr, void *buf, int len,
- unsigned int gup_flags);
+ extern int access_process_vm(struct task_struct *tsk, unsigned long addr,
+ void *buf, int len, unsigned int gup_flags);
extern int access_remote_vm(struct mm_struct *mm, unsigned long addr,
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
-index f60f45f..38c5f76 100644
+index 99ce070..8babe35 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
-@@ -259,6 +259,7 @@ struct vm_region {
+@@ -236,6 +236,7 @@ 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
-@@ -333,6 +334,7 @@ struct vm_area_struct {
+@@ -310,6 +311,7 @@ struct vm_area_struct {
unsigned long vm_pgoff; /* Offset (within vm_file) in PAGE_SIZE
units */
struct file * vm_file; /* File we map to (can be NULL). */
+ struct file *vm_prfile; /* shadow of vm_file */
void * vm_private_data; /* was vm_pte (shared mem) */
- #ifndef CONFIG_MMU
+ atomic_long_t swap_readahead_info;
diff --git a/kernel/fork.c b/kernel/fork.c
-index 4f7151d..ebe8415 100644
+index a191c05..d88ee5a 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
-@@ -641,7 +641,7 @@ static __latent_entropy int dup_mmap(struct mm_struct *mm,
+@@ -506,7 +506,7 @@ 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 026f6a8..723da17 100644
+index 8716bda..68afd6d 100644
--- a/mm/Makefile
+++ b/mm/Makefile
@@ -39,7 +39,7 @@ obj-y := filemap.o mempool.o oom_kill.o \
mm_init.o mmu_context.o percpu.o slab_common.o \
- compaction.o vmacache.o swap_slots.o \
+ compaction.o vmacache.o \
interval_tree.o list_lru.o workingset.o \
- debug.o $(mmu-y)
+ prfile.o debug.o $(mmu-y)
obj-y += init-mm.o
diff --git a/mm/filemap.c b/mm/filemap.c
-index 157c047..0cf15d2 100644
+index 52517f2..250f675 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
-@@ -2406,7 +2406,7 @@ int filemap_page_mkwrite(struct vm_fault *vmf)
- int ret = VM_FAULT_LOCKED;
+@@ -2700,7 +2700,7 @@ vm_fault_t filemap_page_mkwrite(struct vm_fault *vmf)
+ vm_fault_t ret = VM_FAULT_LOCKED;
sb_start_pagefault(inode->i_sb);
- file_update_time(vmf->vma->vm_file);
if (page->mapping != inode->i_mapping) {
unlock_page(page);
diff --git a/mm/mmap.c b/mm/mmap.c
-index cde1262..72ca169 100644
+index ff1944d..88abe2d 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
-@@ -170,7 +170,7 @@ static struct vm_area_struct *remove_vma(struct vm_area_struct *vma)
+@@ -180,7 +180,7 @@ static struct vm_area_struct *remove_vma(struct vm_area_struct *vma)
if (vma->vm_ops && vma->vm_ops->close)
vma->vm_ops->close(vma);
if (vma->vm_file)
- fput(vma->vm_file);
+ vma_fput(vma);
mpol_put(vma_policy(vma));
- kmem_cache_free(vm_area_cachep, vma);
+ vm_area_free(vma);
return next;
-@@ -895,7 +895,7 @@ int __vma_adjust(struct vm_area_struct *vma, unsigned long start,
+@@ -905,7 +905,7 @@ 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);
-@@ -1745,8 +1745,8 @@ unsigned long mmap_region(struct file *file, unsigned long addr,
+@@ -1818,8 +1818,8 @@ 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);
-@@ -2571,7 +2571,7 @@ int __split_vma(struct mm_struct *mm, struct vm_area_struct *vma,
+@@ -2638,7 +2638,7 @@ 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);
-@@ -2590,7 +2590,7 @@ int __split_vma(struct mm_struct *mm, struct vm_area_struct *vma,
+@@ -2657,7 +2657,7 @@ 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));
-@@ -2744,7 +2744,7 @@ SYSCALL_DEFINE5(remap_file_pages, unsigned long, start, unsigned long, size,
+@@ -2819,7 +2819,7 @@ SYSCALL_DEFINE5(remap_file_pages, unsigned long, start, unsigned long, size,
struct vm_area_struct *vma;
unsigned long populate = 0;
unsigned long ret = -EINVAL;
- struct file *file;
+ struct file *file, *prfile;
- pr_warn_once("%s (%d) uses deprecated remap_file_pages() syscall. See Documentation/vm/remap_file_pages.txt.\n",
+ pr_warn_once("%s (%d) uses deprecated remap_file_pages() syscall. See Documentation/vm/remap_file_pages.rst.\n",
current->comm, current->pid);
-@@ -2819,10 +2819,27 @@ SYSCALL_DEFINE5(remap_file_pages, unsigned long, start, unsigned long, size,
+@@ -2894,10 +2894,27 @@ SYSCALL_DEFINE5(remap_file_pages, unsigned long, start, unsigned long, size,
}
}
out:
up_write(&mm->mmap_sem);
if (populate)
-@@ -3113,7 +3130,7 @@ struct vm_area_struct *copy_vma(struct vm_area_struct **vmap,
+@@ -3204,7 +3221,7 @@ 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 2d131b9..5dc9a19 100644
+index 1d22fdb..2b608be 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
-@@ -637,7 +637,7 @@ static void __put_nommu_region(struct vm_region *region)
+@@ -629,7 +629,7 @@ static void __put_nommu_region(struct vm_region *region)
up_write(&nommu_region_sem);
if (region->vm_file)
/* IO memory and memory shared directly out of the pagecache
* from ramfs/tmpfs mustn't be released here */
-@@ -795,7 +795,7 @@ static void delete_vma(struct mm_struct *mm, struct vm_area_struct *vma)
+@@ -767,7 +767,7 @@ static void delete_vma(struct mm_struct *mm, struct vm_area_struct *vma)
if (vma->vm_ops && vma->vm_ops->close)
vma->vm_ops->close(vma);
if (vma->vm_file)
- fput(vma->vm_file);
+ vma_fput(vma);
put_nommu_region(vma->vm_region);
- kmem_cache_free(vm_area_cachep, vma);
+ vm_area_free(vma);
}
-@@ -1322,7 +1322,7 @@ unsigned long do_mmap(struct file *file,
+@@ -1288,7 +1288,7 @@ unsigned long do_mmap(struct file *file,
goto error_just_free;
}
}
kmem_cache_free(vm_region_jar, region);
region = pregion;
result = start;
-@@ -1397,10 +1397,10 @@ unsigned long do_mmap(struct file *file,
+@@ -1363,7 +1363,7 @@ 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);
-+ vma_fput(vma);
- kmem_cache_free(vm_area_cachep, vma);
- return ret;
-
+ fput(vma->vm_file);
diff --git a/mm/prfile.c b/mm/prfile.c
new file mode 100644
-index 0000000..1ef053b
+index 0000000..a27ac36
--- /dev/null
+++ b/mm/prfile.c
-@@ -0,0 +1,85 @@
+@@ -0,0 +1,86 @@
++// SPDX-License-Identifier: GPL-2.0
+/*
+ * Mainly for aufs which mmap(2) different file and wants to print different
+ * path in /proc/PID/maps.
+ *
+ * See Documentation/filesystems/aufs/design/06mmap.txt
+ *
-+ * Copyright (c) 2014-2017 Junjro R. Okajima
++ * Copyright (c) 2014-2018 Junjro R. Okajima
+ * Copyright (c) 2014 Ian Campbell
+ */
+
+ fput(pr);
+}
+#endif /* !CONFIG_MMU */
-aufs4.11.7+ standalone patch
+SPDX-License-Identifier: GPL-2.0
+aufs4.x-rcN standalone patch
diff --git a/fs/dcache.c b/fs/dcache.c
-index 8ca5f09..b1ff5be 100644
+index 88de3b6..de0091a 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
-@@ -1272,6 +1272,7 @@ void d_walk(struct dentry *parent, void *data,
+@@ -1345,6 +1345,7 @@ void d_walk(struct dentry *parent, void *data,
seq = 1;
goto again;
}
struct check_mount {
struct vfsmount *mnt;
-@@ -2864,6 +2865,7 @@ void d_exchange(struct dentry *dentry1, struct dentry *dentry2)
+@@ -2891,6 +2892,7 @@ 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 65145a3..8d35776 100644
+index 72e961a..adc7329 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 f5f4f94..c671660 100644
+index 545e686..0237ad7 100644
--- a/fs/fcntl.c
+++ b/fs/fcntl.c
-@@ -83,6 +83,7 @@ int setfl(int fd, struct file * filp, unsigned long arg)
+@@ -85,6 +85,7 @@ int setfl(int fd, struct file * filp, unsigned long arg)
out:
return error;
}
static void f_modown(struct file *filp, struct pid *pid, enum pid_type type,
int force)
diff --git a/fs/file_table.c b/fs/file_table.c
-index 954d510..4fb5b10 100644
+index 7ec0b3e..819ee07 100644
--- a/fs/file_table.c
+++ b/fs/file_table.c
-@@ -148,6 +148,7 @@ struct file *get_empty_filp(void)
+@@ -147,6 +147,7 @@ struct file *get_empty_filp(void)
}
return ERR_PTR(-ENFILE);
}
/**
* alloc_file - allocate and initialize a 'struct file'
-@@ -259,6 +260,7 @@ void flush_delayed_fput(void)
+@@ -257,6 +258,7 @@ void flush_delayed_fput(void)
{
delayed_fput(NULL);
}
static DECLARE_DELAYED_WORK(delayed_fput_work, delayed_fput);
-@@ -301,6 +303,7 @@ void __fput_sync(struct file *file)
+@@ -299,6 +301,7 @@ void __fput_sync(struct file *file)
}
EXPORT_SYMBOL(fput);
void put_filp(struct file *file)
{
-@@ -309,6 +312,7 @@ void put_filp(struct file *file)
+@@ -307,6 +310,7 @@ void put_filp(struct file *file)
file_free(file);
}
}
+EXPORT_SYMBOL_GPL(put_filp);
void __init files_init(void)
- {
+ {
diff --git a/fs/inode.c b/fs/inode.c
-index 9a9ba3a..a3a18d8 100644
+index af894e7..169811b 100644
--- a/fs/inode.c
+++ b/fs/inode.c
-@@ -1651,6 +1651,7 @@ int update_time(struct inode *inode, struct timespec *time, int flags)
+@@ -1658,6 +1658,7 @@ int update_time(struct inode *inode, struct timespec64 *time, int flags)
return update_time(inode, time, flags);
}
/**
* touch_atime - update the access time
diff --git a/fs/namespace.c b/fs/namespace.c
-index cc1375ef..9b4c67c 100644
+index ee649e0..10923cb 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
-@@ -465,6 +465,7 @@ void __mnt_drop_write(struct vfsmount *mnt)
+@@ -517,6 +517,7 @@ 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
-@@ -1884,6 +1885,7 @@ int iterate_mounts(int (*f)(struct vfsmount *, void *), void *arg,
+@@ -851,6 +852,7 @@ int is_current_mnt_ns(struct vfsmount *mnt)
+ {
+ return check_mnt(real_mount(mnt));
+ }
++EXPORT_SYMBOL_GPL(is_current_mnt_ns);
+
+ /*
+ * vfsmount lock must be held for write
+@@ -1893,6 +1895,7 @@ 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 fbe3cbe..bdfc61e 100644
+index aa5468f2..b38d224 100644
--- a/fs/notify/group.c
+++ b/fs/notify/group.c
@@ -22,6 +22,7 @@
#include <linux/fsnotify_backend.h>
#include "fsnotify.h"
-@@ -100,6 +101,7 @@ void fsnotify_get_group(struct fsnotify_group *group)
+@@ -109,6 +110,7 @@ void fsnotify_get_group(struct fsnotify_group *group)
{
- atomic_inc(&group->refcnt);
+ refcount_inc(&group->refcnt);
}
+EXPORT_SYMBOL_GPL(fsnotify_get_group);
/*
* Drop a reference to a group. Free it if it's through.
-@@ -109,6 +111,7 @@ void fsnotify_put_group(struct fsnotify_group *group)
- if (atomic_dec_and_test(&group->refcnt))
+@@ -118,6 +120,7 @@ void fsnotify_put_group(struct fsnotify_group *group)
+ if (refcount_dec_and_test(&group->refcnt))
fsnotify_final_destroy_group(group);
}
+EXPORT_SYMBOL_GPL(fsnotify_put_group);
/*
* Create a new fsnotify_group and hold a reference for the group returned.
-@@ -137,6 +140,7 @@ struct fsnotify_group *fsnotify_alloc_group(const struct fsnotify_ops *ops)
+@@ -147,6 +150,7 @@ 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 6043306..fdb50e4 100644
+index 61f4c5f..855c655 100644
--- a/fs/notify/mark.c
+++ b/fs/notify/mark.c
-@@ -113,6 +113,7 @@ void fsnotify_put_mark(struct fsnotify_mark *mark)
- mark->free_mark(mark);
- }
+@@ -245,6 +245,7 @@ void fsnotify_put_mark(struct fsnotify_mark *mark)
+ queue_delayed_work(system_unbound_wq, &reaper_work,
+ FSNOTIFY_REAPER_DELAY);
}
+EXPORT_SYMBOL_GPL(fsnotify_put_mark);
- /* Calculate mask of events for a list of marks */
- u32 fsnotify_recalc_mask(struct hlist_head *head)
-@@ -230,6 +231,7 @@ void fsnotify_destroy_mark(struct fsnotify_mark *mark,
+ /*
+ * Get mark reference when we found the mark via lockless traversal of object
+@@ -399,6 +400,7 @@ void fsnotify_destroy_mark(struct fsnotify_mark *mark,
mutex_unlock(&group->mark_mutex);
fsnotify_free_mark(mark);
}
+EXPORT_SYMBOL_GPL(fsnotify_destroy_mark);
- void fsnotify_destroy_marks(struct hlist_head *head, spinlock_t *lock)
- {
-@@ -415,6 +417,7 @@ int fsnotify_add_mark_locked(struct fsnotify_mark *mark,
-
+ /*
+ * Sorting function for lists of fsnotify marks.
+@@ -624,6 +626,7 @@ int fsnotify_add_mark(struct fsnotify_mark *mark, struct inode *inode,
+ mutex_unlock(&group->mark_mutex);
return ret;
}
+EXPORT_SYMBOL_GPL(fsnotify_add_mark);
- int fsnotify_add_mark(struct fsnotify_mark *mark, struct fsnotify_group *group,
- struct inode *inode, struct vfsmount *mnt, int allow_dups)
-@@ -521,6 +524,7 @@ void fsnotify_init_mark(struct fsnotify_mark *mark,
- atomic_set(&mark->refcnt, 1);
- mark->free_mark = free_mark;
+ /*
+ * Given a list of marks, find the mark associated with given group. If found
+@@ -747,6 +750,7 @@ void fsnotify_init_mark(struct fsnotify_mark *mark,
+ fsnotify_get_group(group);
+ mark->group = group;
}
+EXPORT_SYMBOL_GPL(fsnotify_init_mark);
/*
* Destroy all marks in destroy_list, waits for SRCU period to finish before
diff --git a/fs/open.c b/fs/open.c
-index 949cef2..9a892fb8 100644
+index d0e955b..527bc1a 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)
{
-@@ -693,6 +694,7 @@ int open_check_o_direct(struct file *f)
- }
- return 0;
+@@ -723,6 +724,7 @@ SYSCALL_DEFINE3(fchown, unsigned int, fd, uid_t, user, gid_t, group)
+ {
+ return ksys_fchown(fd, user, group);
}
+EXPORT_SYMBOL_GPL(open_check_o_direct);
- static int do_dentry_open(struct file *f,
- struct inode *inode,
+ int open_check_o_direct(struct file *f)
+ {
diff --git a/fs/read_write.c b/fs/read_write.c
-index eba4e7e..ec9e88a 100644
+index ccc5bc8..36f52f4 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
-@@ -523,6 +523,7 @@ vfs_readf_t vfs_readf(struct file *file)
+@@ -459,6 +459,7 @@ ssize_t vfs_read(struct file *file, char __user *buf, size_t count, loff_t *pos)
+
+ return ret;
+ }
++EXPORT_SYMBOL_GPL(vfs_read);
+
+ static ssize_t new_sync_write(struct file *filp, const char __user *buf, size_t len, loff_t *ppos)
+ {
+@@ -499,6 +500,7 @@ vfs_readf_t vfs_readf(struct file *file)
return new_sync_read;
return ERR_PTR(-ENOSYS);
}
vfs_writef_t vfs_writef(struct file *file)
{
-@@ -534,6 +535,7 @@ vfs_writef_t vfs_writef(struct file *file)
+@@ -510,6 +512,7 @@ vfs_writef_t vfs_writef(struct file *file)
return new_sync_write;
return ERR_PTR(-ENOSYS);
}
+EXPORT_SYMBOL_GPL(vfs_writef);
- ssize_t __kernel_write(struct file *file, const char *buf, size_t count, loff_t *pos)
+ ssize_t __kernel_write(struct file *file, const void *buf, size_t count, loff_t *pos)
+ {
+@@ -579,6 +582,7 @@ ssize_t vfs_write(struct file *file, const char __user *buf, size_t count, loff_
+
+ return ret;
+ }
++EXPORT_SYMBOL_GPL(vfs_write);
+
+ static inline loff_t file_pos_read(struct file *file)
{
diff --git a/fs/splice.c b/fs/splice.c
-index 46c87af..0efa652 100644
+index 1dd7f96..a5e3bcb 100644
--- a/fs/splice.c
+++ b/fs/splice.c
-@@ -872,6 +872,7 @@ long do_splice_from(struct pipe_inode_info *pipe, struct file *out,
+@@ -851,6 +851,7 @@ 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.
-@@ -901,6 +902,7 @@ long do_splice_to(struct file *in, loff_t *ppos,
+@@ -880,6 +881,7 @@ 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 abf6a5d..c86fe9c 100644
+index 2860782..ffd7ea4 100644
--- a/fs/sync.c
+++ b/fs/sync.c
-@@ -38,6 +38,7 @@ int __sync_filesystem(struct super_block *sb, int wait)
+@@ -39,6 +39,7 @@ int __sync_filesystem(struct super_block *sb, int wait)
sb->s_op->sync_fs(sb, wait);
return __sync_blockdev(sb->s_bdev, wait);
}
/*
* Write out and wait upon all dirty data associated with this
diff --git a/fs/xattr.c b/fs/xattr.c
-index 94f49a0..243f57e 100644
+index f9cb1db..000b62b 100644
--- a/fs/xattr.c
+++ b/fs/xattr.c
@@ -296,6 +296,7 @@ vfs_getxattr_alloc(struct dentry *dentry, const char *name, char **xattr_value,
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 720f070..4f58215 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)
+ }
+ return lock_classes + hlock->class_idx - 1;
+ }
++EXPORT_SYMBOL_GPL(lockdep_hlock_class);
+ #define hlock_class(hlock) lockdep_hlock_class(hlock)
+
+ #ifdef CONFIG_LOCK_STAT
diff --git a/kernel/task_work.c b/kernel/task_work.c
-index d513051..e056d54 100644
+index 0fef395..83fb1ec 100644
--- a/kernel/task_work.c
+++ b/kernel/task_work.c
-@@ -119,3 +119,4 @@ void task_work_run(void)
+@@ -116,3 +116,4 @@ void task_work_run(void)
} while (work);
}
}
+EXPORT_SYMBOL_GPL(task_work_run);
diff --git a/security/commoncap.c b/security/commoncap.c
-index 78b3783..c8b3e88 100644
+index f4c33ab..70563f1 100644
--- a/security/commoncap.c
+++ b/security/commoncap.c
-@@ -1062,12 +1062,14 @@ int cap_mmap_addr(unsigned long addr)
+@@ -1336,12 +1336,14 @@ int cap_mmap_addr(unsigned long addr)
}
return ret;
}
#ifdef CONFIG_SECURITY
diff --git a/security/device_cgroup.c b/security/device_cgroup.c
-index 03c1652..f88c84b 100644
+index cd97929..424fd23 100644
--- a/security/device_cgroup.c
+++ b/security/device_cgroup.c
-@@ -7,6 +7,7 @@
+@@ -8,6 +8,7 @@
#include <linux/device_cgroup.h>
#include <linux/cgroup.h>
#include <linux/ctype.h>
#include <linux/list.h>
#include <linux/uaccess.h>
#include <linux/seq_file.h>
-@@ -849,6 +850,7 @@ int __devcgroup_inode_permission(struct inode *inode, int mask)
- return __devcgroup_check_permission(type, imajor(inode), iminor(inode),
- access);
- }
-+EXPORT_SYMBOL_GPL(__devcgroup_inode_permission);
+@@ -824,3 +825,4 @@ int __devcgroup_check_permission(short type, u32 major, u32 minor,
- int devcgroup_inode_mknod(int mode, dev_t dev)
- {
+ return 0;
+ }
++EXPORT_SYMBOL_GPL(__devcgroup_check_permission);
diff --git a/security/security.c b/security/security.c
-index d0e07f2..5e323b0 100644
+index 68f46d8..3bc1348 100644
--- a/security/security.c
+++ b/security/security.c
-@@ -481,6 +481,7 @@ int security_path_rmdir(const struct path *dir, struct dentry *dentry)
+@@ -537,6 +537,7 @@ 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)
{
-@@ -497,6 +498,7 @@ int security_path_symlink(const struct path *dir, struct dentry *dentry,
+@@ -553,6 +554,7 @@ 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)
-@@ -505,6 +507,7 @@ int security_path_link(struct dentry *old_dentry, const struct path *new_dir,
+@@ -561,6 +563,7 @@ 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,
-@@ -532,6 +535,7 @@ int security_path_truncate(const struct path *path)
+@@ -588,6 +591,7 @@ 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)
{
-@@ -539,6 +543,7 @@ int security_path_chmod(const struct path *path, umode_t mode)
+@@ -595,6 +599,7 @@ 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)
{
-@@ -546,6 +551,7 @@ int security_path_chown(const struct path *path, kuid_t uid, kgid_t gid)
+@@ -602,6 +607,7 @@ 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)
{
-@@ -631,6 +637,7 @@ int security_inode_readlink(struct dentry *dentry)
+@@ -687,6 +693,7 @@ int security_inode_readlink(struct dentry *dentry)
return 0;
return call_int_hook(inode_readlink, 0, dentry);
}
int security_inode_follow_link(struct dentry *dentry, struct inode *inode,
bool rcu)
-@@ -646,6 +653,7 @@ int security_inode_permission(struct inode *inode, int mask)
+@@ -702,6 +709,7 @@ 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)
{
-@@ -817,6 +825,7 @@ int security_file_permission(struct file *file, int mask)
+@@ -873,6 +881,7 @@ int security_file_permission(struct file *file, int mask)
return fsnotify_perm(file, mask);
}
int security_file_alloc(struct file *file)
{
-@@ -876,6 +885,7 @@ int security_mmap_file(struct file *file, unsigned long prot,
+@@ -932,6 +941,7 @@ int security_mmap_file(struct file *file, unsigned long prot,
return ret;
return ima_file_mmap(file, prot);
}
{
diff -urN /usr/share/empty/Documentation/ABI/testing/debugfs-aufs linux/Documentation/ABI/testing/debugfs-aufs
--- /usr/share/empty/Documentation/ABI/testing/debugfs-aufs 1970-01-01 01:00:00.000000000 +0100
-+++ linux/Documentation/ABI/testing/debugfs-aufs 2017-07-29 12:14:25.893041746 +0200
-@@ -0,0 +1,50 @@
++++ linux/Documentation/ABI/testing/debugfs-aufs 2018-08-12 23:43:05.450124426 +0200
+@@ -0,0 +1,55 @@
+What: /debug/aufs/si_<id>/
+Date: March 2009
+Contact: J. R. Okajima <hooanon05g@gmail.com>
+ When the aufs mount option 'noxino' is specified, it
+ will be empty. About XINO files, see the aufs manual.
+
-+What: /debug/aufs/si_<id>/xino0, xino1 ... xinoN
++What: /debug/aufs/si_<id>/xi0, xi1 ... xiN and xiN-N
+Date: March 2009
+Contact: J. R. Okajima <hooanon05g@gmail.com>
+Description:
+ It shows the consumed blocks by xino (External Inode Number
+ Translation Table), its link count, block size and file
+ size.
-+ When the aufs mount option 'noxino' is specified, it
-+ will be empty. About XINO files, see the aufs manual.
++ Due to the file size limit, there may exist multiple
++ xino files per branch. In this case, "-N" is added to
++ the filename and it corresponds to the index of the
++ internal xino array. "-0" is omitted.
++ When the aufs mount option 'noxino' is specified, Those
++ entries won't exist. About XINO files, see the aufs
++ manual.
+
+What: /debug/aufs/si_<id>/xigen
+Date: March 2009
+ 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 2017-07-29 12:14:25.893041746 +0200
++++ linux/Documentation/filesystems/aufs/design/01intro.txt 2018-04-15 08:49:13.394483860 +0200
@@ -0,0 +1,171 @@
+
-+# Copyright (C) 2005-2017 Junjiro R. Okajima
++# Copyright (C) 2005-2018 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
+Introduction
+----------------------------------------
+
-+aufs [ei ju: ef es] | [a u f s]
++aufs [ei ju: ef es] | /ey-yoo-ef-es/ | [a u f s]
+1. abbrev. for "advanced multi-layered unification filesystem".
+2. abbrev. for "another unionfs".
+3. abbrev. for "auf das" in German which means "on the" in English.
+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 2017-07-29 12:14:25.893041746 +0200
++++ linux/Documentation/filesystems/aufs/design/02struct.txt 2018-04-15 08:49:13.394483860 +0200
@@ -0,0 +1,258 @@
+
-+# Copyright (C) 2005-2017 Junjiro R. Okajima
++# Copyright (C) 2005-2018 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 2017-07-29 12:14:25.893041746 +0200
++++ linux/Documentation/filesystems/aufs/design/03atomic_open.txt 2018-04-15 08:49:13.394483860 +0200
@@ -0,0 +1,85 @@
+
-+# Copyright (C) 2015-2017 Junjiro R. Okajima
++# Copyright (C) 2015-2018 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 2017-07-29 12:14:25.893041746 +0200
++++ linux/Documentation/filesystems/aufs/design/03lookup.txt 2018-04-15 08:49:13.394483860 +0200
@@ -0,0 +1,113 @@
+
-+# Copyright (C) 2005-2017 Junjiro R. Okajima
++# Copyright (C) 2005-2018 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 2017-07-29 12:14:25.893041746 +0200
++++ linux/Documentation/filesystems/aufs/design/04branch.txt 2018-04-15 08:49:13.394483860 +0200
@@ -0,0 +1,74 @@
+
-+# Copyright (C) 2005-2017 Junjiro R. Okajima
++# Copyright (C) 2005-2018 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 2017-07-29 12:14:25.893041746 +0200
++++ linux/Documentation/filesystems/aufs/design/05wbr_policy.txt 2018-04-15 08:49:13.394483860 +0200
@@ -0,0 +1,64 @@
+
-+# Copyright (C) 2005-2017 Junjiro R. Okajima
++# Copyright (C) 2005-2018 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
+ where the source and the target exists and selects the higher
+ one. If the selected branch is readonly, then aufs follows the
+ copyup policy.
+diff -urN /usr/share/empty/Documentation/filesystems/aufs/design/06dirren.dot linux/Documentation/filesystems/aufs/design/06dirren.dot
+--- /usr/share/empty/Documentation/filesystems/aufs/design/06dirren.dot 1970-01-01 01:00:00.000000000 +0100
++++ linux/Documentation/filesystems/aufs/design/06dirren.dot 2018-04-15 08:49:13.394483860 +0200
+@@ -0,0 +1,31 @@
++
++// to view this graph, run dot(1) command in GRAPHVIZ.
++
++digraph G {
++node [shape=box];
++whinfo [label="detailed info file\n(lower_brid_root-hinum, h_inum, namelen, old name)"];
++
++node [shape=oval];
++
++aufs_rename -> whinfo [label="store/remove"];
++
++node [shape=oval];
++inode_list [label="h_inum list in branch\ncache"];
++
++node [shape=box];
++whinode [label="h_inum list file"];
++
++node [shape=oval];
++brmgmt [label="br_add/del/mod/umount"];
++
++brmgmt -> inode_list [label="create/remove"];
++brmgmt -> whinode [label="load/store"];
++
++inode_list -> whinode [style=dashed,dir=both];
++
++aufs_rename -> inode_list [label="add/del"];
++
++aufs_lookup -> inode_list [label="search"];
++
++aufs_lookup -> whinfo [label="load/remove"];
++}
+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
+@@ -0,0 +1,102 @@
++
++# Copyright (C) 2017-2018 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
++# the Free Software Foundation; either version 2 of the License, or
++# (at your option) any later version.
++#
++# This program is distributed in the hope that it will be useful,
++# but WITHOUT ANY WARRANTY; without even the implied warranty of
++# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++# GNU General Public License for more details.
++#
++# You should have received a copy of the GNU General Public License
++# along with this program. If not, see <http://www.gnu.org/licenses/>.
++
++Special handling for renaming a directory (DIRREN)
++----------------------------------------------------------------------
++First, let's assume we have a simple usecase.
++
++- /u = /rw + /ro
++- /rw/dirA exists
++- /ro/dirA and /ro/dirA/file exist too
++- there is no dirB on both branches
++- a user issues rename("dirA", "dirB")
++
++Now, what should aufs behave against this rename(2)?
++There are a few possible cases.
++
++A. returns EROFS.
++ since dirA exists on a readonly branch which cannot be renamed.
++B. returns EXDEV.
++ it is possible to copy-up dirA (only the dir itself), but the child
++ entries ("file" in this case) should not be. it must be a bad
++ approach to copy-up recursively.
++C. returns a success.
++ even the branch /ro is readonly, aufs tries renaming it. Obviously it
++ is a violation of aufs' policy.
++D. construct an extra information which indicates that /ro/dirA should
++ be handled as the name of dirB.
++ overlayfs has a similar feature called REDIRECT.
++
++Until now, aufs implements the case B only which returns EXDEV, and
++expects the userspace application behaves like mv(1) which tries
++issueing rename(2) recursively.
++
++A new aufs feature called DIRREN is introduced which implements the case
++D. There are several "extra information" added.
++
++1. detailed info per renamed directory
++ path: /rw/dirB/$AUFS_WH_DR_INFO_PFX.<lower branch-id>
++2. the inode-number list of directories on a branch
++ path: /rw/dirB/$AUFS_WH_DR_BRHINO
++
++The filename of "detailed info per directory" represents the lower
++branch, and its format is
++- a type of the branch id
++ one of these.
++ + uuid (not implemented yet)
++ + fsid
++ + dev
++- the inode-number of the branch root dir
++
++And it contains these info in a single regular file.
++- magic number
++- branch's inode-number of the logically renamed dir
++- the name of the before-renamed dir
++
++The "detailed info per directory" file is created in aufs rename(2), and
++loaded in any lookup.
++The info is considered in lookup for the matching case only. Here
++"matching" means that the root of branch (in the info filename) is same
++to the current looking-up branch. After looking-up the before-renamed
++name, the inode-number is compared. And the matched dentry is used.
++
++The "inode-number list of directories" is a regular file which contains
++simply the inode-numbers on the branch. The file is created or updated
++in removing the branch, and loaded in adding the branch. Its lifetime is
++equal to the branch.
++The list is refered in lookup, and when the current target inode is
++found in the list, the aufs tries loading the "detailed info per
++directory" and get the changed and valid name of the dir.
++
++Theoretically these "extra informaiton" may be able to be put into XATTR
++in the dir inode. But aufs doesn't choose this way because
++1. XATTR may not be supported by the branch (or its configuration)
++2. XATTR may have its size limit.
++3. XATTR may be less easy to convert than a regular file, when the
++ format of the info is changed in the future.
++At the same time, I agree that the regular file approach is much slower
++than XATTR approach. So, in the future, aufs may take the XATTR or other
++better approach.
++
++This DIRREN feature is enabled by aufs configuration, and is activated
++by a new mount option.
++
++For the more complicated case, there is a work with UDBA option, which
++is to dected the direct access to the branches (by-passing aufs) and to
++maintain the cashes in aufs. Since a single cached aufs dentry may
++contains two names, before- and after-rename, the name comparision in
++UDBA handler may not work correctly. In this case, the behaviour will be
++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 2017-07-29 12:14:25.896375188 +0200
++++ linux/Documentation/filesystems/aufs/design/06fhsm.txt 2018-04-15 08:49:13.394483860 +0200
@@ -0,0 +1,120 @@
+
-+# Copyright (C) 2011-2017 Junjiro R. Okajima
++# Copyright (C) 2011-2018 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 2017-07-29 12:14:25.896375188 +0200
++++ linux/Documentation/filesystems/aufs/design/06mmap.txt 2018-04-15 08:49:13.394483860 +0200
@@ -0,0 +1,72 @@
+
-+# Copyright (C) 2005-2017 Junjiro R. Okajima
++# Copyright (C) 2005-2018 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 2017-07-29 12:14:25.896375188 +0200
++++ linux/Documentation/filesystems/aufs/design/06xattr.txt 2018-04-15 08:49:13.394483860 +0200
@@ -0,0 +1,96 @@
+
-+# Copyright (C) 2014-2017 Junjiro R. Okajima
++# Copyright (C) 2014-2018 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 2017-07-29 12:14:25.896375188 +0200
++++ linux/Documentation/filesystems/aufs/design/07export.txt 2018-04-15 08:49:13.394483860 +0200
@@ -0,0 +1,58 @@
+
-+# Copyright (C) 2005-2017 Junjiro R. Okajima
++# Copyright (C) 2005-2018 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 2017-07-29 12:14:25.896375188 +0200
++++ linux/Documentation/filesystems/aufs/design/08shwh.txt 2018-04-15 08:49:13.394483860 +0200
@@ -0,0 +1,52 @@
+
-+# Copyright (C) 2005-2017 Junjiro R. Okajima
++# Copyright (C) 2005-2018 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 2017-07-29 12:14:25.896375188 +0200
++++ linux/Documentation/filesystems/aufs/design/10dynop.txt 2018-04-15 08:49:13.394483860 +0200
@@ -0,0 +1,47 @@
+
-+# Copyright (C) 2010-2017 Junjiro R. Okajima
++# Copyright (C) 2010-2018 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 2017-07-29 12:14:25.893041746 +0200
++++ linux/Documentation/filesystems/aufs/README 2018-06-15 11:15:15.400449109 +0200
@@ -0,0 +1,393 @@
+
+Aufs4 -- advanced multi layered unification filesystem version 4.x
+James B made a donation (2014/7 and 2015/7).
+Stefano Di Biase made a donation (2014/8).
+Daniel Epellei made a donation (2015/1).
-+OmegaPhil made a donation (2016/1).
++OmegaPhil made a donation (2016/1, 2018/4).
+Tomasz Szewczyk made a donation (2016/4).
+James Burry made a donation (2016/12).
+
+# 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 2017-07-29 12:14:25.896375188 +0200
-@@ -0,0 +1,59 @@
++++ linux/fs/aufs/aufs.h 2018-08-12 23:43:05.450124426 +0200
+@@ -0,0 +1,61 @@
++/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 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 "dbgaufs.h"
+#include "dentry.h"
+#include "dir.h"
++#include "dirren.h"
+#include "dynop.h"
+#include "file.h"
+#include "fstype.h"
++#include "hbl.h"
+#include "inode.h"
+#include "loop.h"
+#include "module.h"
+#include "opts.h"
+#include "rwsem.h"
-+#include "spl.h"
+#include "super.h"
+#include "sysaufs.h"
+#include "vfsub.h"
+#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 2017-07-29 12:14:25.896375188 +0200
++++ linux/fs/aufs/branch.c 2018-08-12 23:43:05.450124426 +0200
@@ -0,0 +1,1422 @@
++// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 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_dykey **key;
+
+ au_hnotify_fin_br(br);
-+
-+ if (br->br_xino.xi_file)
-+ fput(br->br_xino.xi_file);
-+ for (i = br->br_xino.xi_nondir.total - 1; i >= 0; i--)
-+ AuDebugOn(br->br_xino.xi_nondir.array[i]);
-+ kfree(br->br_xino.xi_nondir.array);
++ /* always, regardless the mount option */
++ au_dr_hino_free(&br->br_dirren);
++ au_xino_put(br);
+
+ AuDebugOn(au_br_count(br));
+ au_br_count_fin(br);
+ add_branch = kzalloc(sizeof(*add_branch), GFP_NOFS);
+ if (unlikely(!add_branch))
+ goto out;
-+ add_branch->br_xino.xi_nondir.total = 8; /* initial size */
-+ add_branch->br_xino.xi_nondir.array
-+ = kzalloc(sizeof(ino_t) * add_branch->br_xino.xi_nondir.total,
-+ GFP_NOFS);
-+ if (unlikely(!add_branch->br_xino.xi_nondir.array))
++ add_branch->br_xino = au_xino_alloc();
++ if (unlikely(!add_branch->br_xino))
+ goto out_br;
-+
+ err = au_hnotify_init_br(add_branch, perm);
+ if (unlikely(err))
-+ goto out_xinondir;
++ goto out_xino;
+
+ if (au_br_writable(perm)) {
+ /* may be freed separately at changing the branch permission */
+ kfree(add_branch->br_wbr);
+out_hnotify:
+ au_hnotify_fin_br(add_branch);
-+out_xinondir:
-+ kfree(add_branch->br_xino.xi_nondir.array);
++out_xino:
++ au_xino_put(add_branch);
+out_br:
+ kfree(add_branch);
+out:
+ struct au_opt_add *add)
+{
+ int err;
++ struct au_branch *brbase;
++ struct file *xf;
+ struct inode *h_inode;
+
+ err = 0;
-+ spin_lock_init(&br->br_xino.xi_nondir.spin);
-+ init_waitqueue_head(&br->br_xino.xi_nondir.wqh);
+ br->br_perm = add->perm;
+ br->br_path = add->path; /* set first, path_get() later */
+ spin_lock_init(&br->br_dykey_lock);
+ au_br_count_init(br);
-+ atomic_set(&br->br_xino_running, 0);
+ br->br_id = au_new_br_id(sb);
+ AuDebugOn(br->br_id < 0);
+
++ /* always, regardless the given option */
++ err = au_dr_br_init(sb, br, &add->path);
++ if (unlikely(err))
++ goto out_err;
++
+ if (au_br_writable(add->perm)) {
+ err = au_wbr_init(br, sb, add->perm);
+ if (unlikely(err))
+ }
+
+ if (au_opt_test(au_mntflags(sb), XINO)) {
++ brbase = au_sbr(sb, 0);
++ xf = au_xino_file(brbase);
++ AuDebugOn(!xf);
+ h_inode = d_inode(add->path.dentry);
-+ err = au_xino_br(sb, br, h_inode->i_ino,
-+ au_sbr(sb, 0)->br_xino.xi_file, /*do_test*/1);
++ err = au_xino_init_br(sb, br, h_inode->i_ino, &xf->f_path);
+ if (unlikely(err)) {
-+ AuDebugOn(br->br_xino.xi_file);
++ AuDebugOn(au_xino_file(br));
+ goto out_err;
+ }
+ }
+ struct dentry *root, *h_dentry;
+ struct inode *root_inode;
+ struct au_branch *add_branch;
++ struct file *xf;
+
+ root = sb->s_root;
+ root_inode = d_inode(root);
+ }
+
+ add_bindex = add->bindex;
-+ if (!remount)
-+ au_br_do_add(sb, add_branch, add_bindex);
-+ else {
-+ sysaufs_brs_del(sb, add_bindex);
-+ au_br_do_add(sb, add_branch, add_bindex);
-+ sysaufs_brs_add(sb, add_bindex);
-+ }
++ sysaufs_brs_del(sb, add_bindex); /* remove successors */
++ au_br_do_add(sb, add_branch, add_bindex);
++ sysaufs_brs_add(sb, add_bindex); /* append successors */
++ dbgaufs_brs_add(sb, add_bindex, /*topdown*/0); /* rename successors */
+
+ h_dentry = add->path.dentry;
+ if (!add_bindex) {
+ au_add_nlink(root_inode, d_inode(h_dentry));
+
+ /*
-+ * this test/set prevents aufs from handling unnecesary notify events
++ * this test/set prevents aufs from handling unnecessary notify events
+ * of xino files, in case of re-adding a writable branch which was
+ * once detached from aufs.
+ */
+ if (au_xino_brid(sb) < 0
+ && au_br_writable(add_branch->br_perm)
-+ && !au_test_fs_bad_xino(h_dentry->d_sb)
-+ && add_branch->br_xino.xi_file
-+ && add_branch->br_xino.xi_file->f_path.dentry->d_parent == h_dentry)
-+ au_xino_brid_set(sb, add_branch->br_id);
++ && !au_test_fs_bad_xino(h_dentry->d_sb)) {
++ xf = au_xino_file(add_branch);
++ if (xf && xf->f_path.dentry->d_parent == h_dentry)
++ au_xino_brid_set(sb, add_branch->br_id);
++ }
+
+out:
+ return err;
+{
+ unsigned long long n;
+ struct file **p, *f;
-+ struct au_sphlhead *files;
++ struct hlist_bl_head *files;
++ struct hlist_bl_node *pos;
+ struct au_finfo *finfo;
+
+ n = 0;
+ p = a;
+ files = &au_sbi(sb)->si_files;
-+ spin_lock(&files->spin);
-+ hlist_for_each_entry(finfo, &files->head, fi_hlist) {
++ hlist_bl_lock(files);
++ hlist_bl_for_each_entry(finfo, pos, files, fi_hlist) {
+ f = finfo->fi_file;
+ if (file_count(f)
+ && !special_file(file_inode(f)->i_mode)) {
+ AuDebugOn(n > max);
+ }
+ }
-+ spin_unlock(&files->spin);
++ hlist_bl_unlock(files);
+
+ return n;
+}
+}
+
+static void br_del_file(struct file **to_free, unsigned long long opened,
-+ aufs_bindex_t br_id)
++ aufs_bindex_t br_id)
+{
+ unsigned long long ull;
+ aufs_bindex_t bindex, btop, bbot, bfound;
+ au_br_do_del_hip(au_ii(inode), bindex, bbot);
+ au_sbilist_unlock();
+
++ /* ignore an error */
++ au_dr_br_fin(sb, br); /* always, regardless the mount option */
++
+ dput(h_root);
+ iput(h_inode);
+ au_br_do_free(br);
+ di_write_lock_child(root);
+ }
+
-+ if (!remount)
-+ au_br_do_del(sb, bindex, br);
-+ else {
-+ sysaufs_brs_del(sb, bindex);
-+ au_br_do_del(sb, bindex, br);
-+ sysaufs_brs_add(sb, bindex);
-+ }
++ sysaufs_brs_del(sb, bindex); /* remove successors */
++ dbgaufs_xino_del(br); /* remove one */
++ au_br_do_del(sb, bindex, br);
++ sysaufs_brs_add(sb, bindex); /* append successors */
++ dbgaufs_brs_add(sb, bindex, /*topdown*/1); /* rename successors */
+
+ if (!bindex) {
+ au_cpup_attr_all(d_inode(root), /*force*/1);
+ goto out; /* success */
+
+out_bf:
-+ if (bf)
-+ kfree(bf);
++ kfree(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 2017-07-29 12:14:25.896375188 +0200
-@@ -0,0 +1,321 @@
++++ linux/fs/aufs/branch.h 2018-08-12 23:43:05.453457863 +0200
+@@ -0,0 +1,374 @@
++/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 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/mount.h>
++#include "dirren.h"
+#include "dynop.h"
+#include "rwsem.h"
+#include "super.h"
+/* ---------------------------------------------------------------------- */
+
+/* a xino file */
-+struct au_xino_file {
++struct au_xino {
+ struct file *xi_file;
+ struct {
+ spinlock_t spin;
+ wait_queue_head_t wqh;
+ } xi_nondir;
+
-+ /* todo: make xino files an array to support huge inode number */
++ atomic_t xi_truncating;
+
-+#ifdef CONFIG_DEBUG_FS
-+ struct dentry *xi_dbgaufs;
-+#endif
++ struct kref xi_kref;
++
++ /* todo: make xino files an array to support huge inode number */
+};
+
+/* File-based Hierarchical Storage Management */
+
+/* protected by superblock rwsem */
+struct au_branch {
-+ struct au_xino_file br_xino;
++ struct au_xino *br_xino;
+
+ aufs_bindex_t br_id;
+
+ struct au_wbr *br_wbr;
+ struct au_br_fhsm *br_fhsm;
+
-+ /* xino truncation */
-+ atomic_t br_xino_running;
-+
+#ifdef CONFIG_AUFS_HFSNOTIFY
+ struct au_br_hfsnotify *br_hfsn;
+#endif
+ /* entries under sysfs per mount-point */
+ struct au_brsysfs br_sysfs[AuBrSysfs_Last];
+#endif
++
++#ifdef CONFIG_DEBUG_FS
++ struct dentry *br_dbgaufs; /* xino */
++#endif
++
++ struct au_dr_br br_dirren;
+};
+
+/* ---------------------------------------------------------------------- */
+
+static inline int au_br_rdonly(struct au_branch *br)
+{
-+ return ((au_br_sb(br)->s_flags & MS_RDONLY)
++ return (sb_rdonly(au_br_sb(br))
+ || !au_br_writable(br->br_perm))
+ ? -EROFS : 0;
+}
+ return err;
+}
+
++static inline void au_xino_get(struct au_branch *br)
++{
++ struct au_xino *xi;
++
++ xi = br->br_xino;
++ if (xi)
++ kref_get(&xi->xi_kref);
++}
++
++static inline int au_xino_count(struct au_branch *br)
++{
++ int v;
++ struct au_xino *xi;
++
++ v = 0;
++ xi = br->br_xino;
++ if (xi)
++ v = kref_read(&xi->xi_kref);
++
++ return v;
++}
++
++static inline struct file *au_xino_file(struct au_branch *br)
++{
++ struct au_xino *xi;
++
++ xi = br->br_xino;
++ return xi ? xi->xi_file : NULL;
++}
++
+/* ---------------------------------------------------------------------- */
+
+/* branch.c */
+/* xino.c */
+static const loff_t au_loff_max = LLONG_MAX;
+
-+int au_xib_trunc(struct super_block *sb);
++struct file *au_xino_create(struct super_block *sb, char *fpath, int silent);
++struct file *au_xino_create2(struct super_block *sb, struct path *base,
++ struct file *copy_src);
++
++int au_xino_read(struct super_block *sb, aufs_bindex_t bindex, ino_t h_ino,
++ ino_t *ino);
++int au_xino_write(struct super_block *sb, aufs_bindex_t bindex, ino_t h_ino,
++ ino_t ino);
+ssize_t xino_fread(vfs_readf_t func, struct file *file, void *buf, size_t size,
+ loff_t *pos);
+ssize_t xino_fwrite(vfs_writef_t func, struct file *file, void *buf,
+ size_t size, loff_t *pos);
-+struct file *au_xino_create2(struct file *base_file, struct file *copy_src);
-+struct file *au_xino_create(struct super_block *sb, char *fname, int silent);
-+ino_t au_xino_new_ino(struct super_block *sb);
-+void au_xino_delete_inode(struct inode *inode, const int unlinked);
-+int au_xino_write(struct super_block *sb, aufs_bindex_t bindex, ino_t h_ino,
-+ ino_t ino);
-+int au_xino_read(struct super_block *sb, aufs_bindex_t bindex, ino_t h_ino,
-+ ino_t *ino);
-+int au_xino_br(struct super_block *sb, struct au_branch *br, ino_t hino,
-+ struct file *base_file, int do_test);
++
++int au_xib_trunc(struct super_block *sb);
+int au_xino_trunc(struct super_block *sb, aufs_bindex_t bindex);
+
++struct au_xino *au_xino_alloc(void);
++int au_xino_put(struct au_branch *br);
++void au_xino_file_set(struct au_branch *br, struct file *file);
++
+struct au_opt_xino;
-+int au_xino_set(struct super_block *sb, struct au_opt_xino *xino, int remount);
+void au_xino_clr(struct super_block *sb);
++int au_xino_set(struct super_block *sb, struct au_opt_xino *xiopt, int remount);
+struct file *au_xino_def(struct super_block *sb);
-+int au_xino_path(struct seq_file *seq, struct file *file);
++int au_xino_init_br(struct super_block *sb, struct au_branch *br, ino_t hino,
++ struct path *base);
++
++ino_t au_xino_new_ino(struct super_block *sb);
++void au_xino_delete_inode(struct inode *inode, const int unlinked);
+
+void au_xinondir_leave(struct super_block *sb, aufs_bindex_t bindex,
+ ino_t h_ino, int idx);
+int au_xinondir_enter(struct super_block *sb, aufs_bindex_t bindex, ino_t h_ino,
+ int *idx);
+
++int au_xino_path(struct seq_file *seq, struct file *file);
++
+/* ---------------------------------------------------------------------- */
+
+/* Superblock to branch */
+
+/* ---------------------------------------------------------------------- */
+
++#define wbr_wh_read_lock(wbr) au_rw_read_lock(&(wbr)->wbr_wh_rwsem)
++#define wbr_wh_write_lock(wbr) au_rw_write_lock(&(wbr)->wbr_wh_rwsem)
++#define wbr_wh_read_trylock(wbr) au_rw_read_trylock(&(wbr)->wbr_wh_rwsem)
++#define wbr_wh_write_trylock(wbr) au_rw_write_trylock(&(wbr)->wbr_wh_rwsem)
+/*
-+ * wbr_wh_read_lock, wbr_wh_write_lock
-+ * wbr_wh_read_unlock, wbr_wh_write_unlock, wbr_wh_downgrade_lock
-+ */
-+AuSimpleRwsemFuncs(wbr_wh, struct au_wbr *wbr, &wbr->wbr_wh_rwsem);
++#define wbr_wh_read_trylock_nested(wbr) \
++ au_rw_read_trylock_nested(&(wbr)->wbr_wh_rwsem)
++#define wbr_wh_write_trylock_nested(wbr) \
++ au_rw_write_trylock_nested(&(wbr)->wbr_wh_rwsem)
++*/
++
++#define wbr_wh_read_unlock(wbr) au_rw_read_unlock(&(wbr)->wbr_wh_rwsem)
++#define wbr_wh_write_unlock(wbr) au_rw_write_unlock(&(wbr)->wbr_wh_rwsem)
++#define wbr_wh_downgrade_lock(wbr) au_rw_dgrade_lock(&(wbr)->wbr_wh_rwsem)
+
-+#define WbrWhMustNoWaiters(wbr) AuRwMustNoWaiters(&wbr->wbr_wh_rwsem)
-+#define WbrWhMustAnyLock(wbr) AuRwMustAnyLock(&wbr->wbr_wh_rwsem)
-+#define WbrWhMustWriteLock(wbr) AuRwMustWriteLock(&wbr->wbr_wh_rwsem)
++#define WbrWhMustNoWaiters(wbr) AuRwMustNoWaiters(&(wbr)->wbr_wh_rwsem)
++#define WbrWhMustAnyLock(wbr) AuRwMustAnyLock(&(wbr)->wbr_wh_rwsem)
++#define WbrWhMustWriteLock(wbr) AuRwMustWriteLock(&(wbr)->wbr_wh_rwsem)
+
+/* ---------------------------------------------------------------------- */
+
+#endif /* __AUFS_BRANCH_H__ */
diff -urN /usr/share/empty/fs/aufs/conf.mk linux/fs/aufs/conf.mk
--- /usr/share/empty/fs/aufs/conf.mk 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/conf.mk 2017-07-29 12:14:25.899708630 +0200
-@@ -0,0 +1,38 @@
++++ linux/fs/aufs/conf.mk 2018-06-04 09:08:09.181412645 +0200
+@@ -0,0 +1,40 @@
++# SPDX-License-Identifier: GPL-2.0
+
+AuConfStr = CONFIG_AUFS_FS=${CONFIG_AUFS_FS}
+
+ XATTR \
+ FHSM \
+ RDU \
++ DIRREN \
+ SHWH \
+ BR_RAMFS \
+ BR_FUSE POLL \
+-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 2017-07-29 12:14:25.899708630 +0200
-@@ -0,0 +1,1442 @@
++++ linux/fs/aufs/cpup.c 2018-08-12 23:43:05.453457863 +0200
+@@ -0,0 +1,1441 @@
++// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 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 (!au_test_xfs(h_src_sb))
+ err = au_copy_file(dst, src, len);
+ else {
-+ inode_unlock(h_src_inode);
++ inode_unlock_shared(h_src_inode);
+ err = au_copy_file(dst, src, len);
-+ inode_lock(h_src_inode);
++ inode_lock_shared_nested(h_src_inode, AuLsc_I_CHILD);
+ }
+
+ return err;
+ }
+
+ if (!au_test_nfs(h_src_sb)) {
-+ inode_unlock(h_src_inode);
++ inode_unlock_shared(h_src_inode);
+ err = vfsub_clone_file_range(src, dst, len);
-+ inode_lock(h_src_inode);
++ 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 (tsk->flags & PF_KTHREAD)
+ __fput_sync(file[DST].file);
+ else {
-+ WARN(1, "%pD\nPlease report this warning to aufs-users ML",
-+ file[DST].file);
++ /* it happened actually */
+ fput(file[DST].file);
+ /*
+ * too bad.
+ cpg->len = l;
+ if (cpg->len) {
+ /* try stopping to update while we are referencing */
-+ inode_lock_nested(h_src_inode, AuLsc_I_CHILD);
++ inode_lock_shared_nested(h_src_inode, AuLsc_I_CHILD);
+ au_pin_hdir_unlock(cpg->pin);
+
+ h_path.dentry = au_h_dptr(cpg->dentry, cpg->bsrc);
+ if (!au_test_nfs(h_src_inode->i_sb))
+ err = vfsub_getattr(&h_path, &h_src_attr->st);
+ else {
-+ inode_unlock(h_src_inode);
++ inode_unlock_shared(h_src_inode);
+ err = vfsub_getattr(&h_path, &h_src_attr->st);
-+ inode_lock_nested(h_src_inode, AuLsc_I_CHILD);
++ inode_lock_shared_nested(h_src_inode, AuLsc_I_CHILD);
+ }
+ if (unlikely(err)) {
-+ inode_unlock(h_src_inode);
++ inode_unlock_shared(h_src_inode);
+ goto out;
+ }
+ h_src_attr->valid = 1;
+ if (!au_test_nfs(h_src_inode->i_sb)) {
+ err = au_cp_regular(cpg);
-+ inode_unlock(h_src_inode);
++ inode_unlock_shared(h_src_inode);
+ } else {
-+ inode_unlock(h_src_inode);
++ inode_unlock_shared(h_src_inode);
+ err = au_cp_regular(cpg);
+ }
+ rerr = au_pin_hdir_relock(cpg->pin);
+ switch (mode & S_IFMT) {
+ case S_IFREG:
+ isreg = 1;
-+ err = vfsub_create(h_dir, &h_path, S_IRUSR | S_IWUSR,
-+ /*want_excl*/true);
++ err = vfsub_create(h_dir, &h_path, 0600, /*want_excl*/true);
+ if (!err)
+ err = au_do_cpup_regular(cpg, h_src_attr);
+ break;
+}
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 2017-07-29 12:14:25.899708630 +0200
-@@ -0,0 +1,94 @@
++++ linux/fs/aufs/cpup.h 2018-08-12 23:43:05.453457863 +0200
+@@ -0,0 +1,100 @@
++/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 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 AuCpup_RWDST (1 << 5) /* force write target even if
+ the branch is marked as RO */
+
++#ifndef CONFIG_AUFS_BR_HFSPLUS
++#undef AuCpup_HOPEN
++#define AuCpup_HOPEN 0
++#endif
++
+#define au_ftest_cpup(flags, name) ((flags) & AuCpup_##name)
+#define au_fset_cpup(flags, name) \
+ do { (flags) |= AuCpup_##name; } while (0)
+struct au_dtime {
+ struct dentry *dt_dentry;
+ struct path dt_h_path;
-+ struct timespec dt_atime, dt_mtime;
++ struct timespec64 dt_atime, dt_mtime;
+};
+void au_dtime_store(struct au_dtime *dt, struct dentry *dentry,
+ struct path *h_path);
+#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 2017-07-29 12:14:25.899708630 +0200
-@@ -0,0 +1,438 @@
++++ linux/fs/aufs/dbgaufs.c 2018-08-12 23:43:05.453457863 +0200
+@@ -0,0 +1,478 @@
++// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 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
+
+static struct dentry *dbgaufs;
-+static const mode_t dbgaufs_mode = S_IRUSR | S_IRGRP | S_IROTH;
++static const mode_t dbgaufs_mode = 0444;
+
+/* 20 is max digits length of ulong 64 */
+struct dbgaufs_arg {
+ return 0;
+}
+
-+static int dbgaufs_xi_open(struct file *xf, struct file *file, int do_fcnt)
++static int dbgaufs_xi_open(struct file *xf, struct file *file, int do_fcnt,
++ int cnt)
+{
+ int err;
+ struct kstat st;
+ if (!err) {
+ if (do_fcnt)
+ p->n = snprintf
-+ (p->a, sizeof(p->a), "%ld, %llux%u %lld\n",
-+ (long)file_count(xf), st.blocks, st.blksize,
++ (p->a, sizeof(p->a), "%d, %llux%u %lld\n",
++ cnt, st.blocks, st.blksize,
+ (long long)st.size);
+ else
+ p->n = snprintf(p->a, sizeof(p->a), "%llux%u %lld\n",
+ struct dbgaufs_plink_arg *p;
+ struct au_sbinfo *sbinfo;
+ struct super_block *sb;
-+ struct au_sphlhead *sphl;
++ struct hlist_bl_head *hbl;
+
+ err = -ENOMEM;
+ p = (void *)get_zeroed_page(GFP_NOFS);
+ limit -= n;
+
+ sum = 0;
-+ for (i = 0, sphl = sbinfo->si_plink;
-+ i < AuPlink_NHASH;
-+ i++, sphl++) {
-+ n = au_sphl_count(sphl);
++ for (i = 0, hbl = sbinfo->si_plink; i < AuPlink_NHASH;
++ i++, hbl++) {
++ n = au_hbl_count(hbl);
+ sum += n;
+
+ n = snprintf(p->a + p->n, limit, "%lu ", n);
+ sbinfo = inode->i_private;
+ sb = sbinfo->si_sb;
+ si_noflush_read_lock(sb);
-+ err = dbgaufs_xi_open(sbinfo->si_xib, file, /*do_fcnt*/0);
++ err = dbgaufs_xi_open(sbinfo->si_xib, file, /*do_fcnt*/0, /*cnt*/0);
+ si_read_unlock(sb);
+ return err;
+}
+ struct super_block *sb;
+ struct file *xf;
+ struct qstr *name;
++ struct au_branch *br;
+
+ err = -ENOENT;
+ xf = NULL;
+ sb = sbinfo->si_sb;
+ si_noflush_read_lock(sb);
+ if (l <= au_sbbot(sb)) {
-+ xf = au_sbr(sb, (aufs_bindex_t)l)->br_xino.xi_file;
-+ err = dbgaufs_xi_open(xf, file, /*do_fcnt*/1);
++ br = au_sbr(sb, (aufs_bindex_t)l);
++ xf = au_xino_file(br);
++ err = dbgaufs_xi_open(xf, file, /*do_fcnt*/1,
++ au_xino_count(br));
+ } else
+ err = -ENOENT;
+ si_read_unlock(sb);
+ .read = dbgaufs_xi_read
+};
+
++void dbgaufs_xino_del(struct au_branch *br)
++{
++ struct dentry *dbgaufs;
++
++ dbgaufs = br->br_dbgaufs;
++ if (!dbgaufs)
++ return;
++
++ br->br_dbgaufs = NULL;
++ /* debugfs acquires the parent i_mutex */
++ lockdep_off();
++ debugfs_remove(dbgaufs);
++ lockdep_on();
++}
++
+void dbgaufs_brs_del(struct super_block *sb, aufs_bindex_t bindex)
+{
+ aufs_bindex_t bbot;
+ struct au_branch *br;
-+ struct au_xino_file *xi;
+
+ if (!au_sbi(sb)->si_dbgaufs)
+ return;
+ bbot = au_sbbot(sb);
+ for (; bindex <= bbot; bindex++) {
+ br = au_sbr(sb, bindex);
-+ xi = &br->br_xino;
-+ /* debugfs acquires the parent i_mutex */
++ dbgaufs_xino_del(br);
++ }
++}
++
++static void dbgaufs_br_add(struct super_block *sb, aufs_bindex_t bindex,
++ struct dentry *parent, struct au_sbinfo *sbinfo)
++{
++ struct au_branch *br;
++ struct dentry *d;
++ char name[sizeof(DbgaufsXi_PREFIX) + 5]; /* "xi" bindex NULL */
++
++ snprintf(name, sizeof(name), DbgaufsXi_PREFIX "%d", bindex);
++ br = au_sbr(sb, bindex);
++ if (br->br_dbgaufs) {
++ struct qstr qstr = QSTR_INIT(name, strlen(name));
++
++ if (!au_qstreq(&br->br_dbgaufs->d_name, &qstr)) {
++ /* debugfs acquires the parent i_mutex */
++ lockdep_off();
++ d = debugfs_rename(parent, br->br_dbgaufs, parent,
++ name);
++ lockdep_on();
++ if (unlikely(!d))
++ pr_warn("failed renaming %pd/%s, ignored.\n",
++ parent, name);
++ }
++ } else {
+ lockdep_off();
-+ debugfs_remove(xi->xi_dbgaufs);
++ br->br_dbgaufs = debugfs_create_file(name, dbgaufs_mode, parent,
++ sbinfo, &dbgaufs_xino_fop);
+ lockdep_on();
-+ xi->xi_dbgaufs = NULL;
++ if (unlikely(!br->br_dbgaufs))
++ pr_warn("failed creaiting %pd/%s, ignored.\n",
++ parent, name);
+ }
+}
+
-+void dbgaufs_brs_add(struct super_block *sb, aufs_bindex_t bindex)
++void dbgaufs_brs_add(struct super_block *sb, aufs_bindex_t bindex, int topdown)
+{
+ struct au_sbinfo *sbinfo;
+ struct dentry *parent;
-+ struct au_branch *br;
-+ struct au_xino_file *xi;
+ aufs_bindex_t bbot;
-+ char name[sizeof(DbgaufsXi_PREFIX) + 5]; /* "xi" bindex NULL */
++
++ if (!au_opt_test(au_mntflags(sb), XINO))
++ return;
+
+ sbinfo = au_sbi(sb);
+ parent = sbinfo->si_dbgaufs;
+ return;
+
+ bbot = au_sbbot(sb);
-+ for (; bindex <= bbot; bindex++) {
-+ snprintf(name, sizeof(name), DbgaufsXi_PREFIX "%d", bindex);
-+ br = au_sbr(sb, bindex);
-+ xi = &br->br_xino;
-+ AuDebugOn(xi->xi_dbgaufs);
-+ /* debugfs acquires the parent i_mutex */
-+ lockdep_off();
-+ xi->xi_dbgaufs = debugfs_create_file(name, dbgaufs_mode, parent,
-+ sbinfo, &dbgaufs_xino_fop);
-+ lockdep_on();
-+ /* ignore an error */
-+ if (unlikely(!xi->xi_dbgaufs))
-+ AuWarn1("failed %s under debugfs\n", name);
-+ }
++ if (topdown)
++ for (; bindex <= bbot; bindex++)
++ dbgaufs_br_add(sb, bindex, parent, sbinfo);
++ else
++ for (; bbot >= bindex; bbot--)
++ dbgaufs_br_add(sb, bbot, parent, sbinfo);
+}
+
+/* ---------------------------------------------------------------------- */
+ sbinfo = inode->i_private;
+ sb = sbinfo->si_sb;
+ si_noflush_read_lock(sb);
-+ err = dbgaufs_xi_open(sbinfo->si_xigen, file, /*do_fcnt*/0);
++ err = dbgaufs_xi_open(sbinfo->si_xigen, file, /*do_fcnt*/0, /*cnt*/0);
+ si_read_unlock(sb);
+ return err;
+}
+
+ debugfs_remove_recursive(sbinfo->si_dbgaufs);
+ sbinfo->si_dbgaufs = NULL;
-+ kobject_put(&sbinfo->si_kobj);
+}
+
+int dbgaufs_si_init(struct au_sbinfo *sbinfo)
+ sbinfo->si_dbgaufs = debugfs_create_dir(name, dbgaufs);
+ if (unlikely(!sbinfo->si_dbgaufs))
+ goto out;
-+ kobject_get(&sbinfo->si_kobj);
-+
-+ sbinfo->si_dbgaufs_xib = debugfs_create_file
-+ ("xib", dbgaufs_mode, sbinfo->si_dbgaufs, sbinfo,
-+ &dbgaufs_xib_fop);
-+ if (unlikely(!sbinfo->si_dbgaufs_xib))
-+ goto out_dir;
+
++ /* regardless plink/noplink option */
+ sbinfo->si_dbgaufs_plink = debugfs_create_file
+ ("plink", dbgaufs_mode, sbinfo->si_dbgaufs, sbinfo,
+ &dbgaufs_plink_fop);
+ if (unlikely(!sbinfo->si_dbgaufs_plink))
+ goto out_dir;
+
++ /* regardless xino/noxino option */
++ sbinfo->si_dbgaufs_xib = debugfs_create_file
++ ("xib", dbgaufs_mode, sbinfo->si_dbgaufs, sbinfo,
++ &dbgaufs_xib_fop);
++ if (unlikely(!sbinfo->si_dbgaufs_xib))
++ goto out_dir;
++
+ err = dbgaufs_xigen_init(sbinfo);
+ if (!err)
+ goto out; /* success */
+out_dir:
+ dbgaufs_si_fin(sbinfo);
+out:
++ if (unlikely(err))
++ pr_err("debugfs/aufs failed\n");
+ return err;
+}
+
+}
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 2017-07-29 12:14:25.899708630 +0200
-@@ -0,0 +1,48 @@
++++ linux/fs/aufs/dbgaufs.h 2018-08-12 23:43:05.453457863 +0200
+@@ -0,0 +1,53 @@
++/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 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 super_block;
+struct au_sbinfo;
++struct au_branch;
+
+#ifdef CONFIG_DEBUG_FS
+/* dbgaufs.c */
++void dbgaufs_xino_del(struct au_branch *br);
+void dbgaufs_brs_del(struct super_block *sb, aufs_bindex_t bindex);
-+void dbgaufs_brs_add(struct super_block *sb, aufs_bindex_t bindex);
++void dbgaufs_brs_add(struct super_block *sb, aufs_bindex_t bindex, int topdown);
+void dbgaufs_si_fin(struct au_sbinfo *sbinfo);
+int dbgaufs_si_init(struct au_sbinfo *sbinfo);
+void dbgaufs_fin(void);
+int __init dbgaufs_init(void);
+#else
++AuStubVoid(dbgaufs_xino_del, struct au_branch *br)
+AuStubVoid(dbgaufs_brs_del, struct super_block *sb, aufs_bindex_t bindex)
-+AuStubVoid(dbgaufs_brs_add, struct super_block *sb, aufs_bindex_t bindex)
++AuStubVoid(dbgaufs_brs_add, struct super_block *sb, aufs_bindex_t bindex,
++ int topdown)
+AuStubVoid(dbgaufs_si_fin, struct au_sbinfo *sbinfo)
+AuStubInt0(dbgaufs_si_init, struct au_sbinfo *sbinfo)
+AuStubVoid(dbgaufs_fin, void)
+#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 2017-07-29 12:14:25.899708630 +0200
++++ linux/fs/aufs/dcsub.c 2018-08-12 23:43:05.453457863 +0200
@@ -0,0 +1,225 @@
++// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 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
+};
+
+extern void d_walk(struct dentry *parent, void *data,
-+ enum d_walk_ret (*enter)(void *, struct dentry *),
-+ void (*finish)(void *));
++ enum d_walk_ret (*enter)(void *, struct dentry *));
+
+struct ac_dpages_arg {
+ int err;
+ .arg = arg
+ };
+
-+ d_walk(root, &args, au_call_dpages_append, NULL);
++ d_walk(root, &args, au_call_dpages_append);
+
+ return args.err;
+}
+}
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 2017-07-29 12:14:25.899708630 +0200
-@@ -0,0 +1,136 @@
++++ linux/fs/aufs/dcsub.h 2018-08-12 23:43:05.453457863 +0200
+@@ -0,0 +1,137 @@
++/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 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 2017-07-29 12:14:25.899708630 +0200
-@@ -0,0 +1,440 @@
++++ linux/fs/aufs/debug.c 2018-08-12 23:43:05.453457863 +0200
+@@ -0,0 +1,441 @@
++// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 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
+
+atomic_t aufs_debug = ATOMIC_INIT(0);
+MODULE_PARM_DESC(debug, "debug print");
-+module_param_named(debug, aufs_debug, atomic_t, S_IRUGO | S_IWUSR | S_IWGRP);
++module_param_named(debug, aufs_debug, atomic_t, 0664);
+
+DEFINE_MUTEX(au_dbg_mtx); /* just to serialize the dbg msgs */
+char *au_plevel = KERN_DEBUG;
+ return;
+ }
+
-+ dpri("deblk %u, nblk %lu, deblk %p, last{%lu, %p}, ver %lu\n",
++ dpri("deblk %u, nblk %lu, deblk %p, last{%lu, %p}, ver %llu\n",
+ vdir->vd_deblk_sz, vdir->vd_nblk, vdir->vd_deblk,
+ vdir->vd_last.ul, vdir->vd_last.p.deblk, vdir->vd_version);
+ for (ul = 0; ul < vdir->vd_nblk; ul++) {
+ inode->i_ino, inode->i_sb ? au_sbtype(inode->i_sb) : "??",
+ atomic_read(&inode->i_count), inode->i_nlink, inode->i_mode,
+ i_size_read(inode), (unsigned long long)inode->i_blocks,
-+ hn, (long long)timespec_to_ns(&inode->i_ctime) & 0x0ffff,
++ hn, (long long)timespec64_to_ns(&inode->i_ctime) & 0x0ffff,
+ inode->i_mapping ? inode->i_mapping->nrpages : 0,
-+ inode->i_state, inode->i_flags, inode->i_version,
++ inode->i_state, inode->i_flags, inode_peek_iversion(inode),
+ inode->i_generation,
+ l ? ", wh " : "", l, n);
+ return 0;
+ bindex, br->br_perm, br->br_id, au_br_count(br),
+ br->br_wbr, au_sbtype(sb), MAJOR(sb->s_dev), MINOR(sb->s_dev),
+ sb->s_flags, sb->s_count,
-+ atomic_read(&sb->s_active), !!br->br_xino.xi_file);
++ atomic_read(&sb->s_active), !!au_xino_file(br));
+ return 0;
+
+out:
+}
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 2017-07-29 12:14:25.899708630 +0200
-@@ -0,0 +1,225 @@
++++ linux/fs/aufs/debug.h 2018-08-12 23:43:05.453457863 +0200
+@@ -0,0 +1,226 @@
++/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 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 2017-07-29 12:14:25.899708630 +0200
-@@ -0,0 +1,1130 @@
++++ linux/fs/aufs/dentry.c 2018-08-12 23:43:05.453457863 +0200
+@@ -0,0 +1,1153 @@
++// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 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/namei.h>
+#include "aufs.h"
+
-+struct au_do_lookup_args {
-+ unsigned int flags;
-+ mode_t type;
-+};
-+
+/*
+ * returns positive/negative dentry, NULL or an error.
+ * NULL means whiteout-ed or not-found.
+ */
+static struct dentry*
+au_do_lookup(struct dentry *h_parent, struct dentry *dentry,
-+ aufs_bindex_t bindex, struct qstr *wh_name,
-+ struct au_do_lookup_args *args)
++ aufs_bindex_t bindex, struct au_do_lookup_args *args)
+{
+ struct dentry *h_dentry;
+ struct inode *h_inode;
+ br = au_sbr(dentry->d_sb, bindex);
+ wh_able = !!au_br_whable(br->br_perm);
+ if (wh_able)
-+ wh_found = au_wh_test(h_parent, wh_name, ignore_perm);
++ wh_found = au_wh_test(h_parent, &args->whname, ignore_perm);
+ h_dentry = ERR_PTR(wh_found);
+ if (!wh_found)
+ goto real_lookup;
+
+real_lookup:
+ if (!ignore_perm)
-+ h_dentry = vfsub_lkup_one(&dentry->d_name, h_parent);
++ h_dentry = vfsub_lkup_one(args->name, h_parent);
+ else
-+ h_dentry = au_sio_lkup_one(&dentry->d_name, h_parent);
++ h_dentry = au_sio_lkup_one(args->name, h_parent);
+ if (IS_ERR(h_dentry)) {
+ if (PTR_ERR(h_dentry) == -ENAMETOOLONG
+ && !allow_neg)
+ } else if (wh_found
+ || (args->type && args->type != (h_inode->i_mode & S_IFMT)))
+ goto out_neg;
++ else if (au_ftest_lkup(args->flags, DIRREN)
++ /* && h_inode */
++ && !au_dr_lkup_h_ino(args, bindex, h_inode->i_ino)) {
++ AuDbg("b%d %pd ignored hi%llu\n", bindex, h_dentry,
++ (unsigned long long)h_inode->i_ino);
++ goto out_neg;
++ }
+
+ if (au_dbbot(dentry) <= bindex)
+ au_set_dbbot(dentry, bindex);
+ || (d_really_is_positive(dentry) && !d_is_dir(dentry)))
+ goto out; /* success */
+
-+ inode_lock_nested(h_inode, AuLsc_I_CHILD);
++ inode_lock_shared_nested(h_inode, AuLsc_I_CHILD);
+ opq = au_diropq_test(h_dentry);
-+ inode_unlock(h_inode);
++ inode_unlock_shared(h_inode);
+ if (opq > 0)
+ au_set_dbdiropq(dentry, bindex);
+ else if (unlikely(opq < 0)) {
+{
+ int npositive, err;
+ aufs_bindex_t bindex, btail, bdiropq;
-+ unsigned char isdir, dirperm1;
-+ struct qstr whname;
++ unsigned char isdir, dirperm1, dirren;
+ struct au_do_lookup_args args = {
-+ .flags = flags
++ .flags = flags,
++ .name = &dentry->d_name
+ };
-+ const struct qstr *name = &dentry->d_name;
+ struct dentry *parent;
+ struct super_block *sb;
+
+ sb = dentry->d_sb;
-+ err = au_test_shwh(sb, name);
++ err = au_test_shwh(sb, args.name);
+ if (unlikely(err))
+ goto out;
+
-+ err = au_wh_name_alloc(&whname, name);
++ err = au_wh_name_alloc(&args.whname, args.name);
+ if (unlikely(err))
+ goto out;
+
+ isdir = !!d_is_dir(dentry);
+ dirperm1 = !!au_opt_test(au_mntflags(sb), DIRPERM1);
++ dirren = !!au_opt_test(au_mntflags(sb), DIRREN);
++ if (dirren)
++ au_fset_lkup(args.flags, DIRREN);
+
+ npositive = 0;
+ parent = dget_parent(dentry);
+ for (bindex = btop; bindex <= btail; bindex++) {
+ struct dentry *h_parent, *h_dentry;
+ struct inode *h_inode, *h_dir;
++ struct au_branch *br;
+
+ h_dentry = au_h_dptr(dentry, bindex);
+ if (h_dentry) {
+ if (!h_parent || !d_is_dir(h_parent))
+ continue;
+
++ if (dirren) {
++ /* if the inum matches, then use the prepared name */
++ err = au_dr_lkup_name(&args, bindex);
++ if (unlikely(err))
++ goto out_parent;
++ }
++
+ h_dir = d_inode(h_parent);
-+ inode_lock_nested(h_dir, AuLsc_I_PARENT);
-+ h_dentry = au_do_lookup(h_parent, dentry, bindex, &whname,
-+ &args);
-+ inode_unlock(h_dir);
++ inode_lock_shared_nested(h_dir, AuLsc_I_PARENT);
++ h_dentry = au_do_lookup(h_parent, dentry, bindex, &args);
++ inode_unlock_shared(h_dir);
+ err = PTR_ERR(h_dentry);
+ if (IS_ERR(h_dentry))
+ goto out_parent;
+ if (bdiropq >= 0 && bdiropq <= bindex)
+ break;
+ }
++ br = au_sbr(sb, bindex);
++ if (dirren
++ && au_dr_hino_test_add(&br->br_dirren, h_inode->i_ino,
++ /*add_ent*/NULL)) {
++ /* prepare next name to lookup */
++ err = au_dr_lkup(&args, dentry, bindex);
++ if (unlikely(err))
++ goto out_parent;
++ }
+ }
+
+ if (npositive) {
+
+out_parent:
+ dput(parent);
-+ kfree(whname.name);
++ kfree(args.whname.name);
++ if (dirren)
++ au_dr_lkup_fin(&args);
+out:
+ return err;
+}
+ /* ia->i_nlink = h_inode->i_nlink; */
+ ia->i_uid = h_inode->i_uid;
+ ia->i_gid = h_inode->i_gid;
-+ ia->i_version = h_inode->i_version;
++ ia->i_version = inode_query_iversion(h_inode);
+/*
+ ia->i_size = h_inode->i_size;
+ ia->i_blocks = h_inode->i_blocks;
+ /* || ia->i_nlink != h_inode->i_nlink */
+ || !uid_eq(ia->i_uid, h_inode->i_uid)
+ || !gid_eq(ia->i_gid, h_inode->i_gid)
-+ || ia->i_version != h_inode->i_version
++ || !inode_eq_iversion(h_inode, ia->i_version)
+/*
+ || ia->i_size != h_inode->i_size
+ || ia->i_blocks != h_inode->i_blocks
+
+/* todo: remove this */
+static int h_d_revalidate(struct dentry *dentry, struct inode *inode,
-+ unsigned int flags, int do_udba)
++ unsigned int flags, int do_udba, int dirren)
+{
+ int err;
+ umode_t mode, h_mode;
+ && !is_root
+ && ((!h_nfs
+ && (unhashed != !!d_unhashed(h_dentry)
-+ || (!tmpfile
++ || (!tmpfile && !dirren
+ && !au_qstreq(name, h_name))
+ ))
+ || (h_nfs
+{
+ int valid, err;
+ unsigned int sigen;
-+ unsigned char do_udba;
++ unsigned char do_udba, dirren;
+ struct super_block *sb;
+ struct inode *inode;
+
+ }
+ }
+
-+ err = h_d_revalidate(dentry, inode, flags, do_udba);
++ dirren = !!au_opt_test(au_mntflags(sb), DIRREN);
++ err = h_d_revalidate(dentry, inode, flags, do_udba, dirren);
+ if (unlikely(!err && do_udba && au_dbtop(dentry) < 0)) {
+ err = -EIO;
+ AuDbg("both of real entry and whiteout found, %p, err %d\n",
+};
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 2017-07-29 12:14:25.899708630 +0200
-@@ -0,0 +1,252 @@
++++ linux/fs/aufs/dentry.h 2018-08-12 23:43:05.453457863 +0200
+@@ -0,0 +1,267 @@
++/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 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/dcache.h>
++#include "dirren.h"
+#include "rwsem.h"
+
+struct au_hdentry {
+/* flags for au_lkup_dentry() */
+#define AuLkup_ALLOW_NEG 1
+#define AuLkup_IGNORE_PERM (1 << 1)
++#define AuLkup_DIRREN (1 << 2)
+#define au_ftest_lkup(flags, name) ((flags) & AuLkup_##name)
+#define au_fset_lkup(flags, name) \
+ do { (flags) |= AuLkup_##name; } while (0)
+#define au_fclr_lkup(flags, name) \
+ do { (flags) &= ~AuLkup_##name; } while (0)
+
++#ifndef CONFIG_AUFS_DIRREN
++#undef AuLkup_DIRREN
++#define AuLkup_DIRREN 0
++#endif
++
++struct au_do_lookup_args {
++ unsigned int flags;
++ mode_t type;
++ struct qstr whname, *name;
++ struct au_dr_lookup dirren;
++};
++
+/* ---------------------------------------------------------------------- */
+
+/* dentry.c */
+#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 2017-07-29 12:14:25.899708630 +0200
-@@ -0,0 +1,553 @@
++++ linux/fs/aufs/dinfo.c 2018-08-12 23:43:05.453457863 +0200
+@@ -0,0 +1,554 @@
++// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+}
diff -urN /usr/share/empty/fs/aufs/dir.c linux/fs/aufs/dir.c
--- /usr/share/empty/fs/aufs/dir.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/dir.c 2017-07-29 12:14:25.899708630 +0200
-@@ -0,0 +1,759 @@
++++ linux/fs/aufs/dir.c 2018-08-12 23:43:05.453457863 +0200
+@@ -0,0 +1,760 @@
++// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ au_hn_inode_lock_nested(hdir, AuLsc_I_PARENT);
+ h_dir = au_h_iptr(dir, btop);
+ if (h_dir->i_nlink
-+ && timespec_compare(&h_dir->i_mtime, &dt.dt_mtime) < 0) {
++ && timespec64_compare(&h_dir->i_mtime, &dt.dt_mtime) < 0) {
+ dt.dt_h_path = h_path;
+ au_dtime_revert(&dt);
+ }
+ err = 0;
+ mnt = file->f_path.mnt;
+ dentry = file->f_path.dentry;
-+ file->f_version = d_inode(dentry)->i_version;
++ file->f_version = inode_query_iversion(d_inode(dentry));
+ bindex = au_dbtop(dentry);
+ au_set_fbtop(file, bindex);
+ btail = au_dbtaildir(dentry);
+ finfo = au_fi(file);
+ fidir = finfo->fi_hdir;
+ if (fidir) {
-+ au_sphl_del(&finfo->fi_hlist,
-+ &au_sbi(file->f_path.dentry->d_sb)->si_files);
++ au_hbl_del(&finfo->fi_hlist,
++ &au_sbi(file->f_path.dentry->d_sb)->si_files);
+ vdir_cache = fidir->fd_vdir_cache; /* lock-free */
+ if (vdir_cache)
+ au_vdir_free(vdir_cache);
+ struct inode *inode, *h_inode;
+ struct super_block *sb;
+
-+ AuDbg("%pD, ctx{%pf, %llu}\n", file, ctx->actor, ctx->pos);
++ AuDbg("%pD, ctx{%ps, %llu}\n", file, ctx->actor, ctx->pos);
+
+ dentry = file->f_path.dentry;
+ inode = d_inode(dentry);
+ h_dentry = au_h_dptr(dentry, arg->bindex);
+ h_inode = d_inode(h_dentry);
+ /* todo: i_mode changes anytime? */
-+ inode_lock_nested(h_inode, AuLsc_I_CHILD);
++ inode_lock_shared_nested(h_inode, AuLsc_I_CHILD);
+ err = au_test_h_perm_sio(h_inode, MAY_EXEC | MAY_READ);
-+ inode_unlock(h_inode);
++ inode_unlock_shared(h_inode);
+ if (!err)
+ err = do_test_empty(dentry, arg);
+ else {
+};
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 2017-07-29 12:14:25.899708630 +0200
-@@ -0,0 +1,131 @@
++++ linux/fs/aufs/dir.h 2018-08-12 23:43:05.453457863 +0200
+@@ -0,0 +1,132 @@
++/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 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
+ union au_vdir_deblk_p p;
+ } vd_last;
+
-+ unsigned long vd_version;
++ u64 vd_version;
+ unsigned int vd_deblk_sz;
+ unsigned long vd_jiffy;
+} ____cacheline_aligned_in_smp;
+
+#endif /* __KERNEL__ */
+#endif /* __AUFS_DIR_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 2017-07-29 12:14:25.899708630 +0200
-@@ -0,0 +1,371 @@
+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 2018-08-12 23:43:05.453457863 +0200
+@@ -0,0 +1,1316 @@
++// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2010-2017 Junjiro R. Okajima
++ * Copyright (C) 2017-2018 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
+ */
+
+/*
-+ * dynamically customizable operations for regular files
++ * special handling in renaming a directoy
++ * in order to support looking-up the before-renamed name on the lower readonly
++ * branches
+ */
+
++#include <linux/byteorder/generic.h>
+#include "aufs.h"
+
-+#define DyPrSym(key) AuDbgSym(key->dk_op.dy_hop)
++static void au_dr_hino_del(struct au_dr_br *dr, struct au_dr_hino *ent)
++{
++ int idx;
+
-+/*
-+ * How large will these lists be?
-+ * Usually just a few elements, 20-30 at most for each, I guess.
-+ */
-+static struct au_sphlhead dynop[AuDyLast];
++ idx = au_dr_ihash(ent->dr_h_ino);
++ au_hbl_del(&ent->dr_hnode, dr->dr_h_ino + idx);
++}
+
-+static struct au_dykey *dy_gfind_get(struct au_sphlhead *sphl, const void *h_op)
++static int au_dr_hino_test_empty(struct au_dr_br *dr)
+{
-+ struct au_dykey *key, *tmp;
-+ struct hlist_head *head;
++ int ret, i;
++ struct hlist_bl_head *hbl;
+
-+ key = NULL;
-+ head = &sphl->head;
-+ rcu_read_lock();
-+ hlist_for_each_entry_rcu(tmp, head, dk_hnode)
-+ if (tmp->dk_op.dy_hop == h_op) {
-+ key = tmp;
-+ kref_get(&key->dk_kref);
-+ break;
-+ }
-+ rcu_read_unlock();
++ ret = 1;
++ for (i = 0; ret && i < AuDirren_NHASH; i++) {
++ hbl = dr->dr_h_ino + i;
++ hlist_bl_lock(hbl);
++ ret &= hlist_bl_empty(hbl);
++ hlist_bl_unlock(hbl);
++ }
+
-+ return key;
++ return ret;
+}
+
-+static struct au_dykey *dy_bradd(struct au_branch *br, struct au_dykey *key)
++static struct au_dr_hino *au_dr_hino_find(struct au_dr_br *dr, ino_t ino)
+{
-+ struct au_dykey **k, *found;
-+ const void *h_op = key->dk_op.dy_hop;
-+ int i;
++ struct au_dr_hino *found, *ent;
++ struct hlist_bl_head *hbl;
++ struct hlist_bl_node *pos;
++ int idx;
+
+ found = NULL;
-+ k = br->br_dykey;
-+ for (i = 0; i < AuBrDynOp; i++)
-+ if (k[i]) {
-+ if (k[i]->dk_op.dy_hop == h_op) {
-+ found = k[i];
-+ break;
-+ }
-+ } else
++ idx = au_dr_ihash(ino);
++ hbl = dr->dr_h_ino + idx;
++ hlist_bl_lock(hbl);
++ hlist_bl_for_each_entry(ent, pos, hbl, dr_hnode)
++ if (ent->dr_h_ino == ino) {
++ found = ent;
+ break;
-+ if (!found) {
-+ spin_lock(&br->br_dykey_lock);
-+ for (; i < AuBrDynOp; i++)
-+ if (k[i]) {
-+ if (k[i]->dk_op.dy_hop == h_op) {
-+ found = k[i];
-+ break;
-+ }
-+ } else {
-+ k[i] = key;
-+ break;
-+ }
-+ spin_unlock(&br->br_dykey_lock);
-+ BUG_ON(i == AuBrDynOp); /* expand the array */
-+ }
++ }
++ hlist_bl_unlock(hbl);
+
+ return found;
+}
+
-+/* kref_get() if @key is already added */
-+static struct au_dykey *dy_gadd(struct au_sphlhead *sphl, struct au_dykey *key)
++int au_dr_hino_test_add(struct au_dr_br *dr, ino_t ino,
++ struct au_dr_hino *add_ent)
+{
-+ struct au_dykey *tmp, *found;
-+ struct hlist_head *head;
-+ const void *h_op = key->dk_op.dy_hop;
++ int found, idx;
++ struct hlist_bl_head *hbl;
++ struct hlist_bl_node *pos;
++ struct au_dr_hino *ent;
+
-+ found = NULL;
-+ head = &sphl->head;
-+ spin_lock(&sphl->spin);
-+ hlist_for_each_entry(tmp, head, dk_hnode)
-+ if (tmp->dk_op.dy_hop == h_op) {
-+ kref_get(&tmp->dk_kref);
-+ found = tmp;
++ found = 0;
++ idx = au_dr_ihash(ino);
++ hbl = dr->dr_h_ino + idx;
++#if 0
++ {
++ struct hlist_bl_node *tmp;
++
++ hlist_bl_for_each_entry_safe(ent, pos, tmp, hbl, dr_hnode)
++ AuDbg("hi%llu\n", (unsigned long long)ent->dr_h_ino);
++ }
++#endif
++ hlist_bl_lock(hbl);
++ hlist_bl_for_each_entry(ent, pos, hbl, dr_hnode)
++ if (ent->dr_h_ino == ino) {
++ found = 1;
+ break;
+ }
-+ if (!found)
-+ hlist_add_head_rcu(&key->dk_hnode, head);
-+ spin_unlock(&sphl->spin);
++ if (!found && add_ent)
++ hlist_bl_add_head(&add_ent->dr_hnode, hbl);
++ hlist_bl_unlock(hbl);
++
++ if (!found && add_ent)
++ AuDbg("i%llu added\n", (unsigned long long)add_ent->dr_h_ino);
+
-+ if (!found)
-+ DyPrSym(key);
+ return found;
+}
+
-+static void dy_free_rcu(struct rcu_head *rcu)
++void au_dr_hino_free(struct au_dr_br *dr)
+{
-+ struct au_dykey *key;
-+
-+ key = container_of(rcu, struct au_dykey, dk_rcu);
-+ DyPrSym(key);
-+ kfree(key);
-+}
++ int i;
++ struct hlist_bl_head *hbl;
++ struct hlist_bl_node *pos, *tmp;
++ struct au_dr_hino *ent;
+
-+static void dy_free(struct kref *kref)
-+{
-+ struct au_dykey *key;
-+ struct au_sphlhead *sphl;
++ /* SiMustWriteLock(sb); */
+
-+ key = container_of(kref, struct au_dykey, dk_kref);
-+ sphl = dynop + key->dk_op.dy_type;
-+ au_sphl_del_rcu(&key->dk_hnode, sphl);
-+ call_rcu(&key->dk_rcu, dy_free_rcu);
++ for (i = 0; i < AuDirren_NHASH; i++) {
++ 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);
++ INIT_HLIST_BL_HEAD(hbl);
++ }
+}
+
-+void au_dy_put(struct au_dykey *key)
++/* returns the number of inodes or an error */
++static int au_dr_hino_store(struct super_block *sb, struct au_branch *br,
++ struct file *hinofile)
+{
-+ kref_put(&key->dk_kref, dy_free);
-+}
-+
-+/* ---------------------------------------------------------------------- */
++ int err, i;
++ ssize_t ssz;
++ loff_t pos, oldsize;
++ __be64 u64;
++ struct inode *hinoinode;
++ struct hlist_bl_head *hbl;
++ struct hlist_bl_node *n1, *n2;
++ struct au_dr_hino *ent;
+
-+#define DyDbgSize(cnt, op) AuDebugOn(cnt != sizeof(op)/sizeof(void *))
++ SiMustWriteLock(sb);
++ AuDebugOn(!au_br_writable(br->br_perm));
+
-+#ifdef CONFIG_AUFS_DEBUG
-+#define DyDbgDeclare(cnt) unsigned int cnt = 0
-+#define DyDbgInc(cnt) do { cnt++; } while (0)
-+#else
-+#define DyDbgDeclare(cnt) do {} while (0)
-+#define DyDbgInc(cnt) do {} while (0)
-+#endif
++ hinoinode = file_inode(hinofile);
++ oldsize = i_size_read(hinoinode);
+
-+#define DySet(func, dst, src, h_op, h_sb) do { \
-+ DyDbgInc(cnt); \
-+ if (h_op->func) { \
-+ if (src.func) \
-+ dst.func = src.func; \
-+ else \
-+ AuDbg("%s %s\n", au_sbtype(h_sb), #func); \
-+ } \
-+} while (0)
++ err = 0;
++ pos = 0;
++ hbl = br->br_dirren.dr_h_ino;
++ for (i = 0; !err && i < AuDirren_NHASH; i++, hbl++) {
++ /* no bit-lock since sbinfo must be write-locked */
++ hlist_bl_for_each_entry_safe(ent, n1, n2, hbl, dr_hnode) {
++ AuDbg("hi%llu, %pD2\n",
++ (unsigned long long)ent->dr_h_ino, hinofile);
++ u64 = cpu_to_be64(ent->dr_h_ino);
++ ssz = vfsub_write_k(hinofile, &u64, sizeof(u64), &pos);
++ if (ssz == sizeof(u64))
++ continue;
+
-+#define DySetForce(func, dst, src) do { \
-+ AuDebugOn(!src.func); \
-+ DyDbgInc(cnt); \
-+ dst.func = src.func; \
-+} while (0)
++ /* write error */
++ pr_err("ssz %zd, %pD2\n", ssz, hinofile);
++ err = -ENOSPC;
++ if (ssz < 0)
++ err = ssz;
++ break;
++ }
++ }
++ /* regardless the error */
++ if (pos < oldsize) {
++ err = vfsub_trunc(&hinofile->f_path, pos, /*attr*/0, hinofile);
++ AuTraceErr(err);
++ }
+
-+#define DySetAop(func) \
-+ DySet(func, dyaop->da_op, aufs_aop, h_aop, h_sb)
-+#define DySetAopForce(func) \
-+ DySetForce(func, dyaop->da_op, aufs_aop)
++ AuTraceErr(err);
++ return err;
++}
+
-+static void dy_aop(struct au_dykey *key, const void *h_op,
-+ struct super_block *h_sb __maybe_unused)
++static int au_dr_hino_load(struct au_dr_br *dr, struct file *hinofile)
+{
-+ struct au_dyaop *dyaop = (void *)key;
-+ const struct address_space_operations *h_aop = h_op;
-+ DyDbgDeclare(cnt);
++ int err, hidx;
++ ssize_t ssz;
++ size_t sz, n;
++ loff_t pos;
++ uint64_t u64;
++ struct au_dr_hino *ent;
++ struct inode *hinoinode;
++ struct hlist_bl_head *hbl;
+
-+ AuDbg("%s\n", au_sbtype(h_sb));
++ err = 0;
++ pos = 0;
++ hbl = dr->dr_h_ino;
++ hinoinode = file_inode(hinofile);
++ sz = i_size_read(hinoinode);
++ AuDebugOn(sz % sizeof(u64));
++ n = sz / sizeof(u64);
++ while (n--) {
++ ssz = vfsub_read_k(hinofile, &u64, sizeof(u64), &pos);
++ if (unlikely(ssz != sizeof(u64))) {
++ pr_err("ssz %zd, %pD2\n", ssz, hinofile);
++ err = -EINVAL;
++ if (ssz < 0)
++ err = ssz;
++ goto out_free;
++ }
+
-+ DySetAop(writepage);
-+ DySetAopForce(readpage); /* force */
-+ DySetAop(writepages);
-+ DySetAop(set_page_dirty);
-+ DySetAop(readpages);
-+ DySetAop(write_begin);
-+ DySetAop(write_end);
-+ DySetAop(bmap);
-+ DySetAop(invalidatepage);
-+ DySetAop(releasepage);
-+ DySetAop(freepage);
-+ /* this one will be changed according to an aufs mount option */
-+ DySetAop(direct_IO);
-+ DySetAop(migratepage);
-+ DySetAop(isolate_page);
-+ DySetAop(putback_page);
-+ DySetAop(launder_page);
-+ DySetAop(is_partially_uptodate);
-+ DySetAop(is_dirty_writeback);
-+ DySetAop(error_remove_page);
-+ DySetAop(swap_activate);
-+ DySetAop(swap_deactivate);
++ ent = kmalloc(sizeof(*ent), GFP_NOFS);
++ if (!ent) {
++ err = -ENOMEM;
++ AuTraceErr(err);
++ goto out_free;
++ }
++ ent->dr_h_ino = be64_to_cpu((__force __be64)u64);
++ AuDbg("hi%llu, %pD2\n",
++ (unsigned long long)ent->dr_h_ino, hinofile);
++ hidx = au_dr_ihash(ent->dr_h_ino);
++ au_hbl_add(&ent->dr_hnode, hbl + hidx);
++ }
++ goto out; /* success */
+
-+ DyDbgSize(cnt, *h_aop);
++out_free:
++ au_dr_hino_free(dr);
++out:
++ AuTraceErr(err);
++ return err;
+}
+
-+/* ---------------------------------------------------------------------- */
-+
-+static void dy_bug(struct kref *kref)
++/*
++ * @bindex/@br is a switch to distinguish whether suspending hnotify or not.
++ * @path is a switch to distinguish load and store.
++ */
++static int au_dr_hino(struct super_block *sb, aufs_bindex_t bindex,
++ struct au_branch *br, const struct path *path)
+{
-+ BUG();
-+}
++ int err, flags;
++ unsigned char load, suspend;
++ struct file *hinofile;
++ struct au_hinode *hdir;
++ struct inode *dir, *delegated;
++ struct path hinopath;
++ struct qstr hinoname = QSTR_INIT(AUFS_WH_DR_BRHINO,
++ sizeof(AUFS_WH_DR_BRHINO) - 1);
+
-+static struct au_dykey *dy_get(struct au_dynop *op, struct au_branch *br)
-+{
-+ struct au_dykey *key, *old;
-+ struct au_sphlhead *sphl;
-+ struct op {
-+ unsigned int sz;
-+ void (*set)(struct au_dykey *key, const void *h_op,
-+ struct super_block *h_sb __maybe_unused);
-+ };
-+ static const struct op a[] = {
-+ [AuDy_AOP] = {
-+ .sz = sizeof(struct au_dyaop),
-+ .set = dy_aop
-+ }
-+ };
-+ const struct op *p;
++ AuDebugOn(bindex < 0 && !br);
++ AuDebugOn(bindex >= 0 && br);
+
-+ sphl = dynop + op->dy_type;
-+ key = dy_gfind_get(sphl, op->dy_hop);
-+ if (key)
-+ goto out_add; /* success */
++ err = -EINVAL;
++ suspend = !br;
++ if (suspend)
++ br = au_sbr(sb, bindex);
++ load = !!path;
++ if (!load) {
++ path = &br->br_path;
++ AuDebugOn(!au_br_writable(br->br_perm));
++ if (unlikely(!au_br_writable(br->br_perm)))
++ goto out;
++ }
+
-+ p = a + op->dy_type;
-+ key = kzalloc(p->sz, GFP_NOFS);
-+ if (unlikely(!key)) {
-+ key = ERR_PTR(-ENOMEM);
-+ goto out;
++ hdir = NULL;
++ if (suspend) {
++ dir = d_inode(sb->s_root);
++ hdir = au_hinode(au_ii(dir), bindex);
++ dir = hdir->hi_inode;
++ au_hn_inode_lock_nested(hdir, AuLsc_I_CHILD);
++ } else {
++ dir = d_inode(path->dentry);
++ inode_lock_nested(dir, AuLsc_I_CHILD);
+ }
++ hinopath.dentry = vfsub_lkup_one(&hinoname, path->dentry);
++ err = PTR_ERR(hinopath.dentry);
++ if (IS_ERR(hinopath.dentry))
++ goto out_unlock;
+
-+ key->dk_op.dy_hop = op->dy_hop;
-+ kref_init(&key->dk_kref);
-+ p->set(key, op->dy_hop, au_br_sb(br));
-+ old = dy_gadd(sphl, key);
-+ if (old) {
-+ kfree(key);
-+ key = old;
++ err = 0;
++ flags = O_RDONLY;
++ if (load) {
++ if (d_is_negative(hinopath.dentry))
++ goto out_dput; /* success */
++ } else {
++ if (au_dr_hino_test_empty(&br->br_dirren)) {
++ if (d_is_positive(hinopath.dentry)) {
++ delegated = NULL;
++ err = vfsub_unlink(dir, &hinopath, &delegated,
++ /*force*/0);
++ AuTraceErr(err);
++ if (unlikely(err))
++ pr_err("ignored err %d, %pd2\n",
++ err, hinopath.dentry);
++ if (unlikely(err == -EWOULDBLOCK))
++ iput(delegated);
++ err = 0;
++ }
++ goto out_dput;
++ } else if (!d_is_positive(hinopath.dentry)) {
++ err = vfsub_create(dir, &hinopath, 0600,
++ /*want_excl*/false);
++ AuTraceErr(err);
++ if (unlikely(err))
++ goto out_dput;
++ }
++ flags = O_WRONLY;
++ }
++ hinopath.mnt = path->mnt;
++ hinofile = vfsub_dentry_open(&hinopath, flags);
++ if (suspend)
++ au_hn_inode_unlock(hdir);
++ else
++ inode_unlock(dir);
++ dput(hinopath.dentry);
++ AuTraceErrPtr(hinofile);
++ if (IS_ERR(hinofile)) {
++ err = PTR_ERR(hinofile);
++ goto out;
+ }
+
-+out_add:
-+ old = dy_bradd(br, key);
-+ if (old)
-+ /* its ref-count should never be zero here */
-+ kref_put(&key->dk_kref, dy_bug);
++ if (load)
++ err = au_dr_hino_load(&br->br_dirren, hinofile);
++ else
++ err = au_dr_hino_store(sb, br, hinofile);
++ fput(hinofile);
++ goto out;
++
++out_dput:
++ dput(hinopath.dentry);
++out_unlock:
++ if (suspend)
++ au_hn_inode_unlock(hdir);
++ else
++ inode_unlock(dir);
+out:
-+ return key;
++ AuTraceErr(err);
++ return err;
+}
+
+/* ---------------------------------------------------------------------- */
-+/*
-+ * Aufs prohibits O_DIRECT by defaut even if the branch supports it.
-+ * This behaviour is necessary to return an error from open(O_DIRECT) instead
-+ * of the succeeding I/O. The dio mount option enables O_DIRECT and makes
-+ * open(O_DIRECT) always succeed, but the succeeding I/O may return an error.
-+ * See the aufs manual in detail.
-+ */
-+static void dy_adx(struct au_dyaop *dyaop, int do_dx)
++
++static int au_dr_brid_init(struct au_dr_brid *brid, const struct path *path)
++{
++ int err;
++ struct kstatfs kstfs;
++ dev_t dev;
++ struct dentry *dentry;
++ struct super_block *sb;
++
++ err = vfs_statfs((void *)path, &kstfs);
++ AuTraceErr(err);
++ if (unlikely(err))
++ goto out;
++
++ /* todo: support for UUID */
++
++ if (kstfs.f_fsid.val[0] || kstfs.f_fsid.val[1]) {
++ brid->type = AuBrid_FSID;
++ brid->fsid = kstfs.f_fsid;
++ } else {
++ dentry = path->dentry;
++ sb = dentry->d_sb;
++ dev = sb->s_dev;
++ if (dev) {
++ brid->type = AuBrid_DEV;
++ brid->dev = dev;
++ }
++ }
++
++out:
++ return err;
++}
++
++int au_dr_br_init(struct super_block *sb, struct au_branch *br,
++ const struct path *path)
++{
++ int err, i;
++ struct au_dr_br *dr;
++ struct hlist_bl_head *hbl;
++
++ dr = &br->br_dirren;
++ hbl = dr->dr_h_ino;
++ for (i = 0; i < AuDirren_NHASH; i++, hbl++)
++ INIT_HLIST_BL_HEAD(hbl);
++
++ err = au_dr_brid_init(&dr->dr_brid, path);
++ if (unlikely(err))
++ goto out;
++
++ if (au_opt_test(au_mntflags(sb), DIRREN))
++ err = au_dr_hino(sb, /*bindex*/-1, br, path);
++
++out:
++ AuTraceErr(err);
++ return err;
++}
++
++int au_dr_br_fin(struct super_block *sb, struct au_branch *br)
++{
++ int err;
++
++ err = 0;
++ if (au_br_writable(br->br_perm))
++ err = au_dr_hino(sb, /*bindex*/-1, br, /*path*/NULL);
++ if (!err)
++ au_dr_hino_free(&br->br_dirren);
++
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++static int au_brid_str(struct au_dr_brid *brid, struct inode *h_inode,
++ char *buf, size_t sz)
++{
++ int err;
++ unsigned int major, minor;
++ char *p;
++
++ p = buf;
++ err = snprintf(p, sz, "%d_", brid->type);
++ AuDebugOn(err > sz);
++ p += err;
++ sz -= err;
++ switch (brid->type) {
++ case AuBrid_Unset:
++ return -EINVAL;
++ case AuBrid_UUID:
++ err = snprintf(p, sz, "%pU", brid->uuid.b);
++ break;
++ case AuBrid_FSID:
++ err = snprintf(p, sz, "%08x-%08x",
++ brid->fsid.val[0], brid->fsid.val[1]);
++ break;
++ case AuBrid_DEV:
++ major = MAJOR(brid->dev);
++ minor = MINOR(brid->dev);
++ if (major <= 0xff && minor <= 0xff)
++ err = snprintf(p, sz, "%02x%02x", major, minor);
++ else
++ err = snprintf(p, sz, "%03x:%05x", major, minor);
++ break;
++ }
++ AuDebugOn(err > sz);
++ p += err;
++ sz -= err;
++ err = snprintf(p, sz, "_%llu", (unsigned long long)h_inode->i_ino);
++ AuDebugOn(err > sz);
++ p += err;
++ sz -= err;
++
++ return p - buf;
++}
++
++static int au_drinfo_name(struct au_branch *br, char *name, int len)
++{
++ int rlen;
++ struct dentry *br_dentry;
++ struct inode *br_inode;
++
++ br_dentry = au_br_dentry(br);
++ br_inode = d_inode(br_dentry);
++ rlen = au_brid_str(&br->br_dirren.dr_brid, br_inode, name, len);
++ AuDebugOn(rlen >= AUFS_DIRREN_ENV_VAL_SZ);
++ AuDebugOn(rlen > len);
++
++ return rlen;
++}
++
++/* ---------------------------------------------------------------------- */
++
++/*
++ * from the given @h_dentry, construct drinfo at @*fdata.
++ * when the size of @*fdata is not enough, reallocate and return new @fdata and
++ * @allocated.
++ */
++static int au_drinfo_construct(struct au_drinfo_fdata **fdata,
++ struct dentry *h_dentry,
++ unsigned char *allocated)
++{
++ int err, v;
++ struct au_drinfo_fdata *f, *p;
++ struct au_drinfo *drinfo;
++ struct inode *h_inode;
++ struct qstr *qname;
++
++ err = 0;
++ f = *fdata;
++ h_inode = d_inode(h_dentry);
++ qname = &h_dentry->d_name;
++ drinfo = &f->drinfo;
++ drinfo->ino = (__force uint64_t)cpu_to_be64(h_inode->i_ino);
++ drinfo->oldnamelen = qname->len;
++ if (*allocated < sizeof(*f) + qname->len) {
++ v = roundup_pow_of_two(*allocated + qname->len);
++ p = au_krealloc(f, v, GFP_NOFS, /*may_shrink*/0);
++ if (unlikely(!p)) {
++ err = -ENOMEM;
++ AuTraceErr(err);
++ goto out;
++ }
++ f = p;
++ *fdata = f;
++ *allocated = v;
++ drinfo = &f->drinfo;
++ }
++ memcpy(drinfo->oldname, qname->name, qname->len);
++ AuDbg("i%llu, %.*s\n",
++ be64_to_cpu((__force __be64)drinfo->ino), drinfo->oldnamelen,
++ drinfo->oldname);
++
++out:
++ AuTraceErr(err);
++ return err;
++}
++
++/* callers have to free the return value */
++static struct au_drinfo *au_drinfo_read_k(struct file *file, ino_t h_ino)
++{
++ struct au_drinfo *ret, *drinfo;
++ struct au_drinfo_fdata fdata;
++ int len;
++ loff_t pos;
++ ssize_t ssz;
++
++ ret = ERR_PTR(-EIO);
++ pos = 0;
++ ssz = vfsub_read_k(file, &fdata, sizeof(fdata), &pos);
++ if (unlikely(ssz != sizeof(fdata))) {
++ AuIOErr("ssz %zd, %u, %pD2\n",
++ ssz, (unsigned int)sizeof(fdata), file);
++ goto out;
++ }
++
++ fdata.magic = ntohl((__force __be32)fdata.magic);
++ switch (fdata.magic) {
++ case AUFS_DRINFO_MAGIC_V1:
++ break;
++ default:
++ AuIOErr("magic-num 0x%x, 0x%x, %pD2\n",
++ fdata.magic, AUFS_DRINFO_MAGIC_V1, file);
++ goto out;
++ }
++
++ drinfo = &fdata.drinfo;
++ len = drinfo->oldnamelen;
++ if (!len) {
++ AuIOErr("broken drinfo %pD2\n", file);
++ goto out;
++ }
++
++ ret = NULL;
++ drinfo->ino = be64_to_cpu((__force __be64)drinfo->ino);
++ if (unlikely(h_ino && drinfo->ino != h_ino)) {
++ AuDbg("ignored i%llu, i%llu, %pD2\n",
++ (unsigned long long)drinfo->ino,
++ (unsigned long long)h_ino, file);
++ goto out; /* success */
++ }
++
++ ret = kmalloc(sizeof(*ret) + len, GFP_NOFS);
++ if (unlikely(!ret)) {
++ ret = ERR_PTR(-ENOMEM);
++ AuTraceErrPtr(ret);
++ goto out;
++ }
++
++ *ret = *drinfo;
++ ssz = vfsub_read_k(file, (void *)ret->oldname, len, &pos);
++ if (unlikely(ssz != len)) {
++ kfree(ret);
++ ret = ERR_PTR(-EIO);
++ AuIOErr("ssz %zd, %u, %pD2\n", ssz, len, file);
++ goto out;
++ }
++
++ AuDbg("oldname %.*s\n", ret->oldnamelen, ret->oldname);
++
++out:
++ return ret;
++}
++
++/* ---------------------------------------------------------------------- */
++
++/* in order to be revertible */
++struct au_drinfo_rev_elm {
++ int created;
++ struct dentry *info_dentry;
++ struct au_drinfo *info_last;
++};
++
++struct au_drinfo_rev {
++ unsigned char already;
++ aufs_bindex_t nelm;
++ struct au_drinfo_rev_elm elm[0];
++};
++
++/* todo: isn't it too large? */
++struct au_drinfo_store {
++ struct path h_ppath;
++ struct dentry *h_dentry;
++ struct au_drinfo_fdata *fdata;
++ char *infoname; /* inside of whname, just after PFX */
++ char whname[sizeof(AUFS_WH_DR_INFO_PFX) + AUFS_DIRREN_ENV_VAL_SZ];
++ aufs_bindex_t btgt, btail;
++ unsigned char no_sio,
++ allocated, /* current size of *fdata */
++ infonamelen, /* room size for p */
++ whnamelen, /* length of the genarated name */
++ renameback; /* renamed back */
++};
++
++/* on rename(2) error, the caller should revert it using @elm */
++static int au_drinfo_do_store(struct au_drinfo_store *w,
++ struct au_drinfo_rev_elm *elm)
++{
++ int err, len;
++ ssize_t ssz;
++ loff_t pos;
++ struct path infopath = {
++ .mnt = w->h_ppath.mnt
++ };
++ struct inode *h_dir, *h_inode, *delegated;
++ struct file *infofile;
++ struct qstr *qname;
++
++ AuDebugOn(elm
++ && memcmp(elm, page_address(ZERO_PAGE(0)), sizeof(*elm)));
++
++ infopath.dentry = vfsub_lookup_one_len(w->whname, w->h_ppath.dentry,
++ w->whnamelen);
++ AuTraceErrPtr(infopath.dentry);
++ if (IS_ERR(infopath.dentry)) {
++ err = PTR_ERR(infopath.dentry);
++ goto out;
++ }
++
++ err = 0;
++ h_dir = d_inode(w->h_ppath.dentry);
++ if (elm && d_is_negative(infopath.dentry)) {
++ err = vfsub_create(h_dir, &infopath, 0600, /*want_excl*/true);
++ AuTraceErr(err);
++ if (unlikely(err))
++ goto out_dput;
++ elm->created = 1;
++ elm->info_dentry = dget(infopath.dentry);
++ }
++
++ infofile = vfsub_dentry_open(&infopath, O_RDWR);
++ AuTraceErrPtr(infofile);
++ if (IS_ERR(infofile)) {
++ err = PTR_ERR(infofile);
++ goto out_dput;
++ }
++
++ h_inode = d_inode(infopath.dentry);
++ if (elm && i_size_read(h_inode)) {
++ h_inode = d_inode(w->h_dentry);
++ elm->info_last = au_drinfo_read_k(infofile, h_inode->i_ino);
++ AuTraceErrPtr(elm->info_last);
++ if (IS_ERR(elm->info_last)) {
++ err = PTR_ERR(elm->info_last);
++ elm->info_last = NULL;
++ AuDebugOn(elm->info_dentry);
++ goto out_fput;
++ }
++ }
++
++ if (elm && w->renameback) {
++ delegated = NULL;
++ err = vfsub_unlink(h_dir, &infopath, &delegated, /*force*/0);
++ AuTraceErr(err);
++ if (unlikely(err == -EWOULDBLOCK))
++ iput(delegated);
++ goto out_fput;
++ }
++
++ pos = 0;
++ qname = &w->h_dentry->d_name;
++ len = sizeof(*w->fdata) + qname->len;
++ if (!elm)
++ len = sizeof(*w->fdata) + w->fdata->drinfo.oldnamelen;
++ ssz = vfsub_write_k(infofile, w->fdata, len, &pos);
++ if (ssz == len) {
++ AuDbg("hi%llu, %.*s\n", w->fdata->drinfo.ino,
++ w->fdata->drinfo.oldnamelen, w->fdata->drinfo.oldname);
++ goto out_fput; /* success */
++ } else {
++ err = -EIO;
++ if (ssz < 0)
++ err = ssz;
++ /* the caller should revert it using @elm */
++ }
++
++out_fput:
++ fput(infofile);
++out_dput:
++ dput(infopath.dentry);
++out:
++ AuTraceErr(err);
++ return err;
++}
++
++struct au_call_drinfo_do_store_args {
++ int *errp;
++ struct au_drinfo_store *w;
++ struct au_drinfo_rev_elm *elm;
++};
++
++static void au_call_drinfo_do_store(void *args)
++{
++ struct au_call_drinfo_do_store_args *a = args;
++
++ *a->errp = au_drinfo_do_store(a->w, a->elm);
++}
++
++static int au_drinfo_store_sio(struct au_drinfo_store *w,
++ struct au_drinfo_rev_elm *elm)
++{
++ int err, wkq_err;
++
++ if (w->no_sio)
++ err = au_drinfo_do_store(w, elm);
++ else {
++ struct au_call_drinfo_do_store_args a = {
++ .errp = &err,
++ .w = w,
++ .elm = elm
++ };
++ wkq_err = au_wkq_wait(au_call_drinfo_do_store, &a);
++ if (unlikely(wkq_err))
++ err = wkq_err;
++ }
++ AuTraceErr(err);
++
++ return err;
++}
++
++static int au_drinfo_store_work_init(struct au_drinfo_store *w,
++ aufs_bindex_t btgt)
++{
++ int err;
++
++ memset(w, 0, sizeof(*w));
++ w->allocated = roundup_pow_of_two(sizeof(*w->fdata) + 40);
++ strcpy(w->whname, AUFS_WH_DR_INFO_PFX);
++ w->infoname = w->whname + sizeof(AUFS_WH_DR_INFO_PFX) - 1;
++ w->infonamelen = sizeof(w->whname) - sizeof(AUFS_WH_DR_INFO_PFX);
++ w->btgt = btgt;
++ w->no_sio = !!uid_eq(current_fsuid(), GLOBAL_ROOT_UID);
++
++ err = -ENOMEM;
++ w->fdata = kcalloc(1, w->allocated, GFP_NOFS);
++ if (unlikely(!w->fdata)) {
++ AuTraceErr(err);
++ goto out;
++ }
++ w->fdata->magic = (__force uint32_t)htonl(AUFS_DRINFO_MAGIC_V1);
++ err = 0;
++
++out:
++ return err;
++}
++
++static void au_drinfo_store_work_fin(struct au_drinfo_store *w)
++{
++ kfree(w->fdata);
++}
++
++static void au_drinfo_store_rev(struct au_drinfo_rev *rev,
++ struct au_drinfo_store *w)
++{
++ struct au_drinfo_rev_elm *elm;
++ struct inode *h_dir, *delegated;
++ int err, nelm;
++ struct path infopath = {
++ .mnt = w->h_ppath.mnt
++ };
++
++ h_dir = d_inode(w->h_ppath.dentry);
++ IMustLock(h_dir);
++
++ err = 0;
++ elm = rev->elm;
++ for (nelm = rev->nelm; nelm > 0; nelm--, elm++) {
++ AuDebugOn(elm->created && elm->info_last);
++ if (elm->created) {
++ AuDbg("here\n");
++ delegated = NULL;
++ infopath.dentry = elm->info_dentry;
++ err = vfsub_unlink(h_dir, &infopath, &delegated,
++ !w->no_sio);
++ AuTraceErr(err);
++ if (unlikely(err == -EWOULDBLOCK))
++ iput(delegated);
++ dput(elm->info_dentry);
++ } else if (elm->info_last) {
++ AuDbg("here\n");
++ w->fdata->drinfo = *elm->info_last;
++ memcpy(w->fdata->drinfo.oldname,
++ elm->info_last->oldname,
++ elm->info_last->oldnamelen);
++ err = au_drinfo_store_sio(w, /*elm*/NULL);
++ kfree(elm->info_last);
++ }
++ if (unlikely(err))
++ AuIOErr("%d, %s\n", err, w->whname);
++ /* go on even if err */
++ }
++}
++
++/* caller has to call au_dr_rename_fin() later */
++static int au_drinfo_store(struct dentry *dentry, aufs_bindex_t btgt,
++ struct qstr *dst_name, void *_rev)
++{
++ int err, sz, nelm;
++ aufs_bindex_t bindex, btail;
++ struct au_drinfo_store work;
++ struct au_drinfo_rev *rev, **p;
++ struct au_drinfo_rev_elm *elm;
++ struct super_block *sb;
++ struct au_branch *br;
++ struct au_hinode *hdir;
++
++ err = au_drinfo_store_work_init(&work, btgt);
++ AuTraceErr(err);
++ if (unlikely(err))
++ goto out;
++
++ err = -ENOMEM;
++ btail = au_dbtaildir(dentry);
++ nelm = btail - btgt;
++ sz = sizeof(*rev) + sizeof(*elm) * nelm;
++ rev = kcalloc(1, sz, GFP_NOFS);
++ if (unlikely(!rev)) {
++ AuTraceErr(err);
++ goto out_args;
++ }
++ rev->nelm = nelm;
++ elm = rev->elm;
++ p = _rev;
++ *p = rev;
++
++ err = 0;
++ sb = dentry->d_sb;
++ work.h_ppath.dentry = au_h_dptr(dentry, btgt);
++ work.h_ppath.mnt = au_sbr_mnt(sb, btgt);
++ hdir = au_hi(d_inode(dentry), btgt);
++ au_hn_inode_lock_nested(hdir, AuLsc_I_CHILD);
++ for (bindex = btgt + 1; bindex <= btail; bindex++, elm++) {
++ work.h_dentry = au_h_dptr(dentry, bindex);
++ if (!work.h_dentry)
++ continue;
++
++ err = au_drinfo_construct(&work.fdata, work.h_dentry,
++ &work.allocated);
++ AuTraceErr(err);
++ if (unlikely(err))
++ break;
++
++ work.renameback = au_qstreq(&work.h_dentry->d_name, dst_name);
++ br = au_sbr(sb, bindex);
++ work.whnamelen = sizeof(AUFS_WH_DR_INFO_PFX) - 1;
++ work.whnamelen += au_drinfo_name(br, work.infoname,
++ work.infonamelen);
++ AuDbg("whname %.*s, i%llu, %.*s\n",
++ work.whnamelen, work.whname,
++ be64_to_cpu((__force __be64)work.fdata->drinfo.ino),
++ work.fdata->drinfo.oldnamelen,
++ work.fdata->drinfo.oldname);
++
++ err = au_drinfo_store_sio(&work, elm);
++ AuTraceErr(err);
++ if (unlikely(err))
++ break;
++ }
++ if (unlikely(err)) {
++ /* revert all drinfo */
++ au_drinfo_store_rev(rev, &work);
++ kfree(rev);
++ *p = NULL;
++ }
++ au_hn_inode_unlock(hdir);
++
++out_args:
++ au_drinfo_store_work_fin(&work);
++out:
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++int au_dr_rename(struct dentry *src, aufs_bindex_t bindex,
++ struct qstr *dst_name, void *_rev)
++{
++ int err, already;
++ ino_t ino;
++ struct super_block *sb;
++ struct au_branch *br;
++ struct au_dr_br *dr;
++ struct dentry *h_dentry;
++ struct inode *h_inode;
++ struct au_dr_hino *ent;
++ struct au_drinfo_rev *rev, **p;
++
++ AuDbg("bindex %d\n", bindex);
++
++ err = -ENOMEM;
++ ent = kmalloc(sizeof(*ent), GFP_NOFS);
++ if (unlikely(!ent))
++ goto out;
++
++ sb = src->d_sb;
++ br = au_sbr(sb, bindex);
++ dr = &br->br_dirren;
++ h_dentry = au_h_dptr(src, bindex);
++ h_inode = d_inode(h_dentry);
++ ino = h_inode->i_ino;
++ ent->dr_h_ino = ino;
++ already = au_dr_hino_test_add(dr, ino, ent);
++ AuDbg("b%d, hi%llu, already %d\n",
++ bindex, (unsigned long long)ino, already);
++
++ err = au_drinfo_store(src, bindex, dst_name, _rev);
++ AuTraceErr(err);
++ if (!err) {
++ p = _rev;
++ rev = *p;
++ rev->already = already;
++ goto out; /* success */
++ }
++
++ /* revert */
++ if (!already)
++ au_dr_hino_del(dr, ent);
++ kfree(ent);
++
++out:
++ AuTraceErr(err);
++ return err;
++}
++
++void au_dr_rename_fin(struct dentry *src, aufs_bindex_t btgt, void *_rev)
++{
++ struct au_drinfo_rev *rev;
++ struct au_drinfo_rev_elm *elm;
++ int nelm;
++
++ rev = _rev;
++ elm = rev->elm;
++ for (nelm = rev->nelm; nelm > 0; nelm--, elm++) {
++ dput(elm->info_dentry);
++ kfree(elm->info_last);
++ }
++ kfree(rev);
++}
++
++void au_dr_rename_rev(struct dentry *src, aufs_bindex_t btgt, void *_rev)
++{
++ int err;
++ struct au_drinfo_store work;
++ struct au_drinfo_rev *rev = _rev;
++ struct super_block *sb;
++ struct au_branch *br;
++ struct inode *h_inode;
++ struct au_dr_br *dr;
++ struct au_dr_hino *ent;
++
++ err = au_drinfo_store_work_init(&work, btgt);
++ if (unlikely(err))
++ goto out;
++
++ sb = src->d_sb;
++ br = au_sbr(sb, btgt);
++ work.h_ppath.dentry = au_h_dptr(src, btgt);
++ work.h_ppath.mnt = au_br_mnt(br);
++ au_drinfo_store_rev(rev, &work);
++ au_drinfo_store_work_fin(&work);
++ if (rev->already)
++ goto out;
++
++ dr = &br->br_dirren;
++ h_inode = d_inode(work.h_ppath.dentry);
++ ent = au_dr_hino_find(dr, h_inode->i_ino);
++ BUG_ON(!ent);
++ au_dr_hino_del(dr, ent);
++ kfree(ent);
++
++out:
++ kfree(rev);
++ if (unlikely(err))
++ pr_err("failed to remove dirren info\n");
++}
++
++/* ---------------------------------------------------------------------- */
++
++static struct au_drinfo *au_drinfo_do_load(struct path *h_ppath,
++ char *whname, int whnamelen,
++ struct dentry **info_dentry)
++{
++ struct au_drinfo *drinfo;
++ struct file *f;
++ struct inode *h_dir;
++ struct path infopath;
++ int unlocked;
++
++ AuDbg("%pd/%.*s\n", h_ppath->dentry, whnamelen, whname);
++
++ *info_dentry = NULL;
++ drinfo = NULL;
++ unlocked = 0;
++ h_dir = d_inode(h_ppath->dentry);
++ inode_lock_shared_nested(h_dir, AuLsc_I_PARENT);
++ infopath.dentry = vfsub_lookup_one_len(whname, h_ppath->dentry,
++ whnamelen);
++ if (IS_ERR(infopath.dentry)) {
++ drinfo = (void *)infopath.dentry;
++ goto out;
++ }
++
++ if (d_is_negative(infopath.dentry))
++ goto out_dput; /* success */
++
++ infopath.mnt = h_ppath->mnt;
++ f = vfsub_dentry_open(&infopath, O_RDONLY);
++ inode_unlock_shared(h_dir);
++ unlocked = 1;
++ if (IS_ERR(f)) {
++ drinfo = (void *)f;
++ goto out_dput;
++ }
++
++ drinfo = au_drinfo_read_k(f, /*h_ino*/0);
++ if (IS_ERR_OR_NULL(drinfo))
++ goto out_fput;
++
++ AuDbg("oldname %.*s\n", drinfo->oldnamelen, drinfo->oldname);
++ *info_dentry = dget(infopath.dentry); /* keep it alive */
++
++out_fput:
++ fput(f);
++out_dput:
++ dput(infopath.dentry);
++out:
++ if (!unlocked)
++ inode_unlock_shared(h_dir);
++ AuTraceErrPtr(drinfo);
++ return drinfo;
++}
++
++struct au_drinfo_do_load_args {
++ struct au_drinfo **drinfop;
++ struct path *h_ppath;
++ char *whname;
++ int whnamelen;
++ struct dentry **info_dentry;
++};
++
++static void au_call_drinfo_do_load(void *args)
++{
++ struct au_drinfo_do_load_args *a = args;
++
++ *a->drinfop = au_drinfo_do_load(a->h_ppath, a->whname, a->whnamelen,
++ a->info_dentry);
++}
++
++struct au_drinfo_load {
++ struct path h_ppath;
++ struct qstr *qname;
++ unsigned char no_sio;
++
++ aufs_bindex_t ninfo;
++ struct au_drinfo **drinfo;
++};
++
++static int au_drinfo_load(struct au_drinfo_load *w, aufs_bindex_t bindex,
++ struct au_branch *br)
++{
++ int err, wkq_err, whnamelen, e;
++ char whname[sizeof(AUFS_WH_DR_INFO_PFX) + AUFS_DIRREN_ENV_VAL_SZ]
++ = AUFS_WH_DR_INFO_PFX;
++ struct au_drinfo *drinfo;
++ struct qstr oldname;
++ struct inode *h_dir, *delegated;
++ struct dentry *info_dentry;
++ struct path infopath;
++
++ whnamelen = sizeof(AUFS_WH_DR_INFO_PFX) - 1;
++ whnamelen += au_drinfo_name(br, whname + whnamelen,
++ sizeof(whname) - whnamelen);
++ if (w->no_sio)
++ drinfo = au_drinfo_do_load(&w->h_ppath, whname, whnamelen,
++ &info_dentry);
++ else {
++ struct au_drinfo_do_load_args args = {
++ .drinfop = &drinfo,
++ .h_ppath = &w->h_ppath,
++ .whname = whname,
++ .whnamelen = whnamelen,
++ .info_dentry = &info_dentry
++ };
++ wkq_err = au_wkq_wait(au_call_drinfo_do_load, &args);
++ if (unlikely(wkq_err))
++ drinfo = ERR_PTR(wkq_err);
++ }
++ err = PTR_ERR(drinfo);
++ if (IS_ERR_OR_NULL(drinfo))
++ goto out;
++
++ err = 0;
++ oldname.len = drinfo->oldnamelen;
++ oldname.name = drinfo->oldname;
++ if (au_qstreq(w->qname, &oldname)) {
++ /* the name is renamed back */
++ kfree(drinfo);
++ drinfo = NULL;
++
++ infopath.dentry = info_dentry;
++ infopath.mnt = w->h_ppath.mnt;
++ h_dir = d_inode(w->h_ppath.dentry);
++ delegated = NULL;
++ inode_lock_nested(h_dir, AuLsc_I_PARENT);
++ e = vfsub_unlink(h_dir, &infopath, &delegated, !w->no_sio);
++ inode_unlock(h_dir);
++ if (unlikely(e))
++ AuIOErr("ignored %d, %pd2\n", e, &infopath.dentry);
++ if (unlikely(e == -EWOULDBLOCK))
++ iput(delegated);
++ }
++ kfree(w->drinfo[bindex]);
++ w->drinfo[bindex] = drinfo;
++ dput(info_dentry);
++
++out:
++ AuTraceErr(err);
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++static void au_dr_lkup_free(struct au_drinfo **drinfo, int n)
++{
++ struct au_drinfo **p = drinfo;
++
++ while (n-- > 0)
++ kfree(*drinfo++);
++ kfree(p);
++}
++
++int au_dr_lkup(struct au_do_lookup_args *lkup, struct dentry *dentry,
++ aufs_bindex_t btgt)
++{
++ int err, ninfo;
++ struct au_drinfo_load w;
++ aufs_bindex_t bindex, bbot;
++ struct au_branch *br;
++ struct inode *h_dir;
++ struct au_dr_hino *ent;
++ struct super_block *sb;
++
++ AuDbg("%.*s, name %.*s, whname %.*s, b%d\n",
++ AuLNPair(&dentry->d_name), AuLNPair(&lkup->dirren.dr_name),
++ AuLNPair(&lkup->whname), btgt);
++
++ sb = dentry->d_sb;
++ bbot = au_sbbot(sb);
++ w.ninfo = bbot + 1;
++ if (!lkup->dirren.drinfo) {
++ lkup->dirren.drinfo = kcalloc(w.ninfo,
++ sizeof(*lkup->dirren.drinfo),
++ GFP_NOFS);
++ if (unlikely(!lkup->dirren.drinfo)) {
++ err = -ENOMEM;
++ goto out;
++ }
++ lkup->dirren.ninfo = w.ninfo;
++ }
++ w.drinfo = lkup->dirren.drinfo;
++ w.no_sio = !!uid_eq(current_fsuid(), GLOBAL_ROOT_UID);
++ w.h_ppath.dentry = au_h_dptr(dentry, btgt);
++ AuDebugOn(!w.h_ppath.dentry);
++ w.h_ppath.mnt = au_sbr_mnt(sb, btgt);
++ w.qname = &dentry->d_name;
++
++ ninfo = 0;
++ for (bindex = btgt + 1; bindex <= bbot; bindex++) {
++ br = au_sbr(sb, bindex);
++ err = au_drinfo_load(&w, bindex, br);
++ if (unlikely(err))
++ goto out_free;
++ if (w.drinfo[bindex])
++ ninfo++;
++ }
++ if (!ninfo) {
++ br = au_sbr(sb, btgt);
++ h_dir = d_inode(w.h_ppath.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);
++ }
++ goto out; /* success */
++
++out_free:
++ au_dr_lkup_free(lkup->dirren.drinfo, lkup->dirren.ninfo);
++ lkup->dirren.ninfo = 0;
++ lkup->dirren.drinfo = NULL;
++out:
++ AuTraceErr(err);
++ return err;
++}
++
++void au_dr_lkup_fin(struct au_do_lookup_args *lkup)
++{
++ au_dr_lkup_free(lkup->dirren.drinfo, lkup->dirren.ninfo);
++}
++
++int au_dr_lkup_name(struct au_do_lookup_args *lkup, aufs_bindex_t btgt)
++{
++ int err;
++ struct au_drinfo *drinfo;
++
++ err = 0;
++ if (!lkup->dirren.drinfo)
++ goto out;
++ AuDebugOn(lkup->dirren.ninfo < btgt + 1);
++ drinfo = lkup->dirren.drinfo[btgt + 1];
++ if (!drinfo)
++ goto out;
++
++ kfree(lkup->whname.name);
++ lkup->whname.name = NULL;
++ lkup->dirren.dr_name.len = drinfo->oldnamelen;
++ lkup->dirren.dr_name.name = drinfo->oldname;
++ lkup->name = &lkup->dirren.dr_name;
++ err = au_wh_name_alloc(&lkup->whname, lkup->name);
++ if (!err)
++ AuDbg("name %.*s, whname %.*s, b%d\n",
++ AuLNPair(lkup->name), AuLNPair(&lkup->whname),
++ btgt);
++
++out:
++ AuTraceErr(err);
++ return err;
++}
++
++int au_dr_lkup_h_ino(struct au_do_lookup_args *lkup, aufs_bindex_t bindex,
++ ino_t h_ino)
++{
++ int match;
++ struct au_drinfo *drinfo;
++
++ match = 1;
++ if (!lkup->dirren.drinfo)
++ goto out;
++ AuDebugOn(lkup->dirren.ninfo < bindex + 1);
++ drinfo = lkup->dirren.drinfo[bindex + 1];
++ if (!drinfo)
++ goto out;
++
++ match = (drinfo->ino == h_ino);
++ AuDbg("match %d\n", match);
++
++out:
++ return match;
++}
++
++/* ---------------------------------------------------------------------- */
++
++int au_dr_opt_set(struct super_block *sb)
++{
++ int err;
++ aufs_bindex_t bindex, bbot;
++ struct au_branch *br;
++
++ err = 0;
++ bbot = au_sbbot(sb);
++ for (bindex = 0; !err && bindex <= bbot; bindex++) {
++ br = au_sbr(sb, bindex);
++ err = au_dr_hino(sb, bindex, /*br*/NULL, &br->br_path);
++ }
++
++ return err;
++}
++
++int au_dr_opt_flush(struct super_block *sb)
++{
++ int err;
++ aufs_bindex_t bindex, bbot;
++ struct au_branch *br;
++
++ err = 0;
++ bbot = au_sbbot(sb);
++ for (bindex = 0; !err && bindex <= bbot; bindex++) {
++ br = au_sbr(sb, bindex);
++ if (au_br_writable(br->br_perm))
++ err = au_dr_hino(sb, bindex, /*br*/NULL, /*path*/NULL);
++ }
++
++ return err;
++}
++
++int au_dr_opt_clr(struct super_block *sb, int no_flush)
++{
++ int err;
++ aufs_bindex_t bindex, bbot;
++ struct au_branch *br;
++
++ err = 0;
++ if (!no_flush) {
++ err = au_dr_opt_flush(sb);
++ if (unlikely(err))
++ goto out;
++ }
++
++ bbot = au_sbbot(sb);
++ for (bindex = 0; bindex <= bbot; bindex++) {
++ br = au_sbr(sb, bindex);
++ au_dr_hino_free(&br->br_dirren);
++ }
++
++out:
++ return err;
++}
+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
+@@ -0,0 +1,140 @@
++/* SPDX-License-Identifier: GPL-2.0 */
++/*
++ * Copyright (C) 2017-2018 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program. If not, see <http://www.gnu.org/licenses/>.
++ */
++
++/*
++ * renamed dir info
++ */
++
++#ifndef __AUFS_DIRREN_H__
++#define __AUFS_DIRREN_H__
++
++#ifdef __KERNEL__
++
++#include <linux/dcache.h>
++#include <linux/statfs.h>
++#include <linux/uuid.h>
++#include "hbl.h"
++
++#define AuDirren_NHASH 100
++
++#ifdef CONFIG_AUFS_DIRREN
++enum au_brid_type {
++ AuBrid_Unset,
++ AuBrid_UUID,
++ AuBrid_FSID,
++ AuBrid_DEV
++};
++
++struct au_dr_brid {
++ enum au_brid_type type;
++ union {
++ uuid_t uuid; /* unimplemented yet */
++ fsid_t fsid;
++ dev_t dev;
++ };
++};
++
++/* 20 is the max digits length of ulong 64 */
++/* brid-type "_" uuid "_" inum */
++#define AUFS_DIRREN_FNAME_SZ (1 + 1 + UUID_STRING_LEN + 20)
++#define AUFS_DIRREN_ENV_VAL_SZ (AUFS_DIRREN_FNAME_SZ + 1 + 20)
++
++struct au_dr_hino {
++ struct hlist_bl_node dr_hnode;
++ ino_t dr_h_ino;
++};
++
++struct au_dr_br {
++ struct hlist_bl_head dr_h_ino[AuDirren_NHASH];
++ struct au_dr_brid dr_brid;
++};
++
++struct au_dr_lookup {
++ /* dr_name is pointed by struct au_do_lookup_args.name */
++ struct qstr dr_name; /* subset of dr_info */
++ aufs_bindex_t ninfo;
++ struct au_drinfo **drinfo;
++};
++#else
++struct au_dr_hino;
++/* empty */
++struct au_dr_br { };
++struct au_dr_lookup { };
++#endif
++
++/* ---------------------------------------------------------------------- */
++
++struct au_branch;
++struct au_do_lookup_args;
++struct au_hinode;
++#ifdef CONFIG_AUFS_DIRREN
++int au_dr_hino_test_add(struct au_dr_br *dr, ino_t h_ino,
++ struct au_dr_hino *add_ent);
++void au_dr_hino_free(struct au_dr_br *dr);
++int au_dr_br_init(struct super_block *sb, struct au_branch *br,
++ const struct path *path);
++int au_dr_br_fin(struct super_block *sb, struct au_branch *br);
++int au_dr_rename(struct dentry *src, aufs_bindex_t bindex,
++ struct qstr *dst_name, void *_rev);
++void au_dr_rename_fin(struct dentry *src, aufs_bindex_t btgt, void *rev);
++void au_dr_rename_rev(struct dentry *src, aufs_bindex_t bindex, void *rev);
++int au_dr_lkup(struct au_do_lookup_args *lkup, struct dentry *dentry,
++ aufs_bindex_t bindex);
++int au_dr_lkup_name(struct au_do_lookup_args *lkup, aufs_bindex_t btgt);
++int au_dr_lkup_h_ino(struct au_do_lookup_args *lkup, aufs_bindex_t bindex,
++ ino_t h_ino);
++void au_dr_lkup_fin(struct au_do_lookup_args *lkup);
++int au_dr_opt_set(struct super_block *sb);
++int au_dr_opt_flush(struct super_block *sb);
++int au_dr_opt_clr(struct super_block *sb, int no_flush);
++#else
++AuStubInt0(au_dr_hino_test_add, struct au_dr_br *dr, ino_t h_ino,
++ struct au_dr_hino *add_ent);
++AuStubVoid(au_dr_hino_free, struct au_dr_br *dr);
++AuStubInt0(au_dr_br_init, struct super_block *sb, struct au_branch *br,
++ const struct path *path);
++AuStubInt0(au_dr_br_fin, struct super_block *sb, struct au_branch *br);
++AuStubInt0(au_dr_rename, struct dentry *src, aufs_bindex_t bindex,
++ struct qstr *dst_name, void *_rev);
++AuStubVoid(au_dr_rename_fin, struct dentry *src, aufs_bindex_t btgt, void *rev);
++AuStubVoid(au_dr_rename_rev, struct dentry *src, aufs_bindex_t bindex,
++ void *rev);
++AuStubInt0(au_dr_lkup, struct au_do_lookup_args *lkup, struct dentry *dentry,
++ aufs_bindex_t bindex);
++AuStubInt0(au_dr_lkup_name, struct au_do_lookup_args *lkup, aufs_bindex_t btgt);
++AuStubInt0(au_dr_lkup_h_ino, struct au_do_lookup_args *lkup,
++ aufs_bindex_t bindex, ino_t h_ino);
++AuStubVoid(au_dr_lkup_fin, struct au_do_lookup_args *lkup);
++AuStubInt0(au_dr_opt_set, struct super_block *sb);
++AuStubInt0(au_dr_opt_flush, struct super_block *sb);
++AuStubInt0(au_dr_opt_clr, struct super_block *sb, int no_flush);
++#endif
++
++/* ---------------------------------------------------------------------- */
++
++#ifdef CONFIG_AUFS_DIRREN
++static inline int au_dr_ihash(ino_t h_ino)
++{
++ return h_ino % AuDirren_NHASH;
++}
++#else
++AuStubInt0(au_dr_ihash, ino_t h_ino);
++#endif
++
++#endif /* __KERNEL__ */
++#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 2018-08-12 23:43:05.456791299 +0200
+@@ -0,0 +1,370 @@
++// SPDX-License-Identifier: GPL-2.0
++/*
++ * Copyright (C) 2010-2018 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program. If not, see <http://www.gnu.org/licenses/>.
++ */
++
++/*
++ * dynamically customizable operations for regular files
++ */
++
++#include "aufs.h"
++
++#define DyPrSym(key) AuDbgSym(key->dk_op.dy_hop)
++
++/*
++ * How large will these lists be?
++ * Usually just a few elements, 20-30 at most for each, I guess.
++ */
++static struct hlist_bl_head dynop[AuDyLast];
++
++static struct au_dykey *dy_gfind_get(struct hlist_bl_head *hbl,
++ const void *h_op)
++{
++ struct au_dykey *key, *tmp;
++ struct hlist_bl_node *pos;
++
++ key = NULL;
++ 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);
++ break;
++ }
++ hlist_bl_unlock(hbl);
++
++ return key;
++}
++
++static struct au_dykey *dy_bradd(struct au_branch *br, struct au_dykey *key)
++{
++ struct au_dykey **k, *found;
++ const void *h_op = key->dk_op.dy_hop;
++ int i;
++
++ found = NULL;
++ k = br->br_dykey;
++ for (i = 0; i < AuBrDynOp; i++)
++ if (k[i]) {
++ if (k[i]->dk_op.dy_hop == h_op) {
++ found = k[i];
++ break;
++ }
++ } else
++ break;
++ if (!found) {
++ spin_lock(&br->br_dykey_lock);
++ for (; i < AuBrDynOp; i++)
++ if (k[i]) {
++ if (k[i]->dk_op.dy_hop == h_op) {
++ found = k[i];
++ break;
++ }
++ } else {
++ k[i] = key;
++ break;
++ }
++ spin_unlock(&br->br_dykey_lock);
++ BUG_ON(i == AuBrDynOp); /* expand the array */
++ }
++
++ return found;
++}
++
++/* kref_get() if @key is already added */
++static struct au_dykey *dy_gadd(struct hlist_bl_head *hbl, struct au_dykey *key)
++{
++ struct au_dykey *tmp, *found;
++ struct hlist_bl_node *pos;
++ const void *h_op = key->dk_op.dy_hop;
++
++ found = NULL;
++ 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;
++ break;
++ }
++ if (!found)
++ hlist_bl_add_head(&key->dk_hnode, hbl);
++ hlist_bl_unlock(hbl);
++
++ if (!found)
++ DyPrSym(key);
++ return found;
++}
++
++static void dy_free_rcu(struct rcu_head *rcu)
++{
++ struct au_dykey *key;
++
++ key = container_of(rcu, struct au_dykey, dk_rcu);
++ DyPrSym(key);
++ kfree(key);
++}
++
++static void dy_free(struct kref *kref)
++{
++ struct au_dykey *key;
++ struct hlist_bl_head *hbl;
++
++ key = container_of(kref, struct au_dykey, dk_kref);
++ hbl = dynop + key->dk_op.dy_type;
++ au_hbl_del(&key->dk_hnode, hbl);
++ call_rcu(&key->dk_rcu, dy_free_rcu);
++}
++
++void au_dy_put(struct au_dykey *key)
++{
++ kref_put(&key->dk_kref, dy_free);
++}
++
++/* ---------------------------------------------------------------------- */
++
++#define DyDbgSize(cnt, op) AuDebugOn(cnt != sizeof(op)/sizeof(void *))
++
++#ifdef CONFIG_AUFS_DEBUG
++#define DyDbgDeclare(cnt) unsigned int cnt = 0
++#define DyDbgInc(cnt) do { cnt++; } while (0)
++#else
++#define DyDbgDeclare(cnt) do {} while (0)
++#define DyDbgInc(cnt) do {} while (0)
++#endif
++
++#define DySet(func, dst, src, h_op, h_sb) do { \
++ DyDbgInc(cnt); \
++ if (h_op->func) { \
++ if (src.func) \
++ dst.func = src.func; \
++ else \
++ AuDbg("%s %s\n", au_sbtype(h_sb), #func); \
++ } \
++} while (0)
++
++#define DySetForce(func, dst, src) do { \
++ AuDebugOn(!src.func); \
++ DyDbgInc(cnt); \
++ dst.func = src.func; \
++} while (0)
++
++#define DySetAop(func) \
++ DySet(func, dyaop->da_op, aufs_aop, h_aop, h_sb)
++#define DySetAopForce(func) \
++ DySetForce(func, dyaop->da_op, aufs_aop)
++
++static void dy_aop(struct au_dykey *key, const void *h_op,
++ struct super_block *h_sb __maybe_unused)
++{
++ struct au_dyaop *dyaop = (void *)key;
++ const struct address_space_operations *h_aop = h_op;
++ DyDbgDeclare(cnt);
++
++ AuDbg("%s\n", au_sbtype(h_sb));
++
++ DySetAop(writepage);
++ DySetAopForce(readpage); /* force */
++ DySetAop(writepages);
++ DySetAop(set_page_dirty);
++ DySetAop(readpages);
++ DySetAop(write_begin);
++ DySetAop(write_end);
++ DySetAop(bmap);
++ DySetAop(invalidatepage);
++ DySetAop(releasepage);
++ DySetAop(freepage);
++ /* this one will be changed according to an aufs mount option */
++ DySetAop(direct_IO);
++ DySetAop(migratepage);
++ DySetAop(isolate_page);
++ DySetAop(putback_page);
++ DySetAop(launder_page);
++ DySetAop(is_partially_uptodate);
++ DySetAop(is_dirty_writeback);
++ DySetAop(error_remove_page);
++ DySetAop(swap_activate);
++ DySetAop(swap_deactivate);
++
++ DyDbgSize(cnt, *h_aop);
++}
++
++/* ---------------------------------------------------------------------- */
++
++static void dy_bug(struct kref *kref)
++{
++ BUG();
++}
++
++static struct au_dykey *dy_get(struct au_dynop *op, struct au_branch *br)
++{
++ struct au_dykey *key, *old;
++ struct hlist_bl_head *hbl;
++ struct op {
++ unsigned int sz;
++ void (*set)(struct au_dykey *key, const void *h_op,
++ struct super_block *h_sb __maybe_unused);
++ };
++ static const struct op a[] = {
++ [AuDy_AOP] = {
++ .sz = sizeof(struct au_dyaop),
++ .set = dy_aop
++ }
++ };
++ const struct op *p;
++
++ hbl = dynop + op->dy_type;
++ key = dy_gfind_get(hbl, op->dy_hop);
++ if (key)
++ goto out_add; /* success */
++
++ p = a + op->dy_type;
++ key = kzalloc(p->sz, GFP_NOFS);
++ if (unlikely(!key)) {
++ key = ERR_PTR(-ENOMEM);
++ goto out;
++ }
++
++ key->dk_op.dy_hop = op->dy_hop;
++ kref_init(&key->dk_kref);
++ p->set(key, op->dy_hop, au_br_sb(br));
++ old = dy_gadd(hbl, key);
++ if (old) {
++ kfree(key);
++ key = old;
++ }
++
++out_add:
++ old = dy_bradd(br, key);
++ if (old)
++ /* its ref-count should never be zero here */
++ kref_put(&key->dk_kref, dy_bug);
++out:
++ return key;
++}
++
++/* ---------------------------------------------------------------------- */
++/*
++ * Aufs prohibits O_DIRECT by defaut even if the branch supports it.
++ * This behaviour is necessary to return an error from open(O_DIRECT) instead
++ * of the succeeding I/O. The dio mount option enables O_DIRECT and makes
++ * open(O_DIRECT) always succeed, but the succeeding I/O may return an error.
++ * See the aufs manual in detail.
++ */
++static void dy_adx(struct au_dyaop *dyaop, int do_dx)
+{
+ if (!do_dx)
+ dyaop->da_op.direct_IO = NULL;
+
+void au_dy_arefresh(int do_dx)
+{
-+ struct au_sphlhead *sphl;
-+ struct hlist_head *head;
++ struct hlist_bl_head *hbl;
++ struct hlist_bl_node *pos;
+ struct au_dykey *key;
+
-+ sphl = dynop + AuDy_AOP;
-+ head = &sphl->head;
-+ spin_lock(&sphl->spin);
-+ hlist_for_each_entry(key, head, dk_hnode)
++ hbl = dynop + AuDy_AOP;
++ hlist_bl_lock(hbl);
++ hlist_bl_for_each_entry(key, pos, hbl, dk_hnode)
+ dy_adx((void *)key, do_dx);
-+ spin_unlock(&sphl->spin);
++ hlist_bl_unlock(hbl);
+}
+
+/* ---------------------------------------------------------------------- */
+ BUILD_BUG_ON(offsetof(struct au_dyaop, da_key));
+
+ for (i = 0; i < AuDyLast; i++)
-+ au_sphl_init(dynop + i);
++ INIT_HLIST_BL_HEAD(dynop + i);
+}
+
+void au_dy_fin(void)
+ int i;
+
+ for (i = 0; i < AuDyLast; i++)
-+ WARN_ON(!hlist_empty(&dynop[i].head));
++ WARN_ON(!hlist_bl_empty(dynop + i));
+}
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 2017-07-29 12:14:25.899708630 +0200
-@@ -0,0 +1,74 @@
++++ linux/fs/aufs/dynop.h 2018-08-12 23:43:05.456791299 +0200
+@@ -0,0 +1,75 @@
++/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2010-2017 Junjiro R. Okajima
++ * Copyright (C) 2010-2018 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_dykey {
+ union {
-+ struct hlist_node dk_hnode;
++ struct hlist_bl_node dk_hnode;
+ struct rcu_head dk_rcu;
+ };
+ struct au_dynop dk_op;
+#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 2017-07-29 12:14:25.903042072 +0200
-@@ -0,0 +1,836 @@
++++ linux/fs/aufs/export.c 2018-08-12 23:43:05.456791299 +0200
+@@ -0,0 +1,838 @@
++// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ return err;
+}
+
-+int au_xigen_set(struct super_block *sb, struct file *base)
++int au_xigen_set(struct super_block *sb, struct path *path)
+{
+ int err;
+ struct au_sbinfo *sbinfo;
+ SiMustWriteLock(sb);
+
+ sbinfo = au_sbi(sb);
-+ file = au_xino_create2(base, sbinfo->si_xigen);
++ file = au_xino_create2(sb, path, sbinfo->si_xigen);
+ err = PTR_ERR(file);
+ if (IS_ERR(file))
+ goto out;
+ sbinfo->si_xigen = file;
+
+out:
++ AuTraceErr(err);
+ return err;
+}
+
+}
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 2017-07-29 12:14:25.903042072 +0200
-@@ -0,0 +1,426 @@
++++ linux/fs/aufs/fhsm.c 2018-08-12 23:43:05.456791299 +0200
+@@ -0,0 +1,427 @@
++// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2011-2017 Junjiro R. Okajima
++ * Copyright (C) 2011-2018 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 unsigned int au_fhsm_poll(struct file *file,
-+ struct poll_table_struct *wait)
++static __poll_t au_fhsm_poll(struct file *file, struct poll_table_struct *wait)
+{
-+ unsigned int mask;
++ __poll_t mask;
+ struct au_sbinfo *sbinfo;
+ struct au_fhsm *fhsm;
+
+ fhsm = &sbinfo->si_fhsm;
+ poll_wait(file, &fhsm->fhsm_wqh, wait);
+ if (atomic_read(&fhsm->fhsm_readable))
-+ mask = POLLIN /* | POLLRDNORM */;
++ mask = EPOLLIN /* | EPOLLRDNORM */;
+
-+ AuTraceErr((int)mask);
++ if (!mask)
++ AuDbg("mask 0x%x\n", mask);
+ return mask;
+}
+
+}
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 2017-07-29 12:14:25.903042072 +0200
-@@ -0,0 +1,858 @@
++++ linux/fs/aufs/file.c 2018-08-12 23:43:05.456791299 +0200
+@@ -0,0 +1,857 @@
++// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+
+static int au_cmoo(struct dentry *dentry)
+{
-+ int err, cmoo;
++ int err, cmoo, matched;
+ unsigned int udba;
+ struct path h_path;
+ struct au_pin pin;
+ sbinfo = au_sbi(sb);
+ fhsm = &sbinfo->si_fhsm;
+ pid = au_fhsm_pid(fhsm);
-+ if (pid
-+ && (current->pid == pid
-+ || current->real_parent->pid == pid))
++ rcu_read_lock();
++ matched = (pid
++ && (current->pid == pid
++ || rcu_dereference(current->real_parent)->pid == pid));
++ rcu_read_unlock();
++ if (matched)
+ goto out;
+
+ br = au_sbr(sb, cpg.bsrc);
+
+int au_do_open(struct file *file, struct au_do_open_args *args)
+{
-+ int err, no_lock = args->no_lock;
++ int err, aopen = args->aopen;
+ struct dentry *dentry;
+ struct au_finfo *finfo;
+
-+ if (!no_lock)
++ if (!aopen)
+ err = au_finfo_init(file, args->fidir);
+ else {
+ lockdep_off();
+
+ dentry = file->f_path.dentry;
+ AuDebugOn(IS_ERR_OR_NULL(dentry));
-+ if (!no_lock) {
-+ di_write_lock_child(dentry);
-+ err = au_cmoo(dentry);
-+ di_downgrade_lock(dentry, AuLock_IR);
-+ if (!err)
++ di_write_lock_child(dentry);
++ err = au_cmoo(dentry);
++ di_downgrade_lock(dentry, AuLock_IR);
++ if (!err) {
++ if (!aopen)
+ err = args->open(file, vfsub_file_flags(file), NULL);
-+ di_read_unlock(dentry, AuLock_IR);
-+ } else {
-+ err = au_cmoo(dentry);
-+ if (!err)
-+ err = args->open(file, vfsub_file_flags(file),
-+ args->h_file);
-+ if (!err && au_fbtop(file) != au_dbtop(dentry))
-+ /*
-+ * cmoo happens after h_file was opened.
-+ * need to refresh file later.
-+ */
-+ atomic_dec(&au_fi(file)->fi_generation);
++ else {
++ lockdep_off();
++ err = args->open(file, vfsub_file_flags(file), NULL);
++ lockdep_on();
++ }
+ }
++ di_read_unlock(dentry, AuLock_IR);
+
+ finfo = au_fi(file);
+ if (!err) {
+ finfo->fi_file = file;
-+ au_sphl_add(&finfo->fi_hlist,
-+ &au_sbi(file->f_path.dentry->d_sb)->si_files);
++ au_hbl_add(&finfo->fi_hlist,
++ &au_sbi(file->f_path.dentry->d_sb)->si_files);
+ }
-+ if (!no_lock)
++ if (!aopen)
+ fi_write_unlock(file);
+ else {
+ lockdep_off();
+ }
+
+out:
++ AuTraceErr(err);
+ return err;
+}
+
+};
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 2017-07-29 12:14:25.903042072 +0200
-@@ -0,0 +1,330 @@
++++ linux/fs/aufs/file.h 2018-08-12 23:43:05.456791299 +0200
+@@ -0,0 +1,341 @@
++/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 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/file.h>
+#include <linux/fs.h>
++#include <linux/mm_types.h>
+#include <linux/poll.h>
+#include "rwsem.h"
+
+ };
+ struct au_fidir *fi_hdir; /* for dir only */
+
-+ struct hlist_node fi_hlist;
++ struct hlist_bl_node fi_hlist;
+ struct file *fi_file; /* very ugly */
+} ____cacheline_aligned_in_smp;
+
+struct file *au_h_open(struct dentry *dentry, aufs_bindex_t bindex, int flags,
+ struct file *file, int force_wr);
+struct au_do_open_args {
-+ int no_lock;
++ int aopen;
+ int (*open)(struct file *file, int flags,
+ struct file *h_file);
+ struct au_fidir *fidir;
+
+/* poll.c */
+#ifdef CONFIG_AUFS_POLL
-+unsigned int aufs_poll(struct file *file, poll_table *wait);
++__poll_t aufs_poll(struct file *file, struct poll_table_struct *pt);
+#endif
+
+#ifdef CONFIG_AUFS_BR_HFSPLUS
+
+/* ---------------------------------------------------------------------- */
+
++#define fi_read_lock(f) au_rw_read_lock(&au_fi(f)->fi_rwsem)
++#define fi_write_lock(f) au_rw_write_lock(&au_fi(f)->fi_rwsem)
++#define fi_read_trylock(f) au_rw_read_trylock(&au_fi(f)->fi_rwsem)
++#define fi_write_trylock(f) au_rw_write_trylock(&au_fi(f)->fi_rwsem)
+/*
-+ * fi_read_lock, fi_write_lock,
-+ * fi_read_unlock, fi_write_unlock, fi_downgrade_lock
-+ */
-+AuSimpleRwsemFuncs(fi, struct file *f, &au_fi(f)->fi_rwsem);
++#define fi_read_trylock_nested(f) \
++ au_rw_read_trylock_nested(&au_fi(f)->fi_rwsem)
++#define fi_write_trylock_nested(f) \
++ au_rw_write_trylock_nested(&au_fi(f)->fi_rwsem)
++*/
++
++#define fi_read_unlock(f) au_rw_read_unlock(&au_fi(f)->fi_rwsem)
++#define fi_write_unlock(f) au_rw_write_unlock(&au_fi(f)->fi_rwsem)
++#define fi_downgrade_lock(f) au_rw_dgrade_lock(&au_fi(f)->fi_rwsem)
+
+/* lock subclass for finfo */
+enum {
+#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 2017-07-29 12:14:25.903042072 +0200
-@@ -0,0 +1,148 @@
++++ linux/fs/aufs/finfo.c 2018-08-12 23:43:05.456791299 +0200
+@@ -0,0 +1,149 @@
++// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 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 2017-07-29 12:14:25.903042072 +0200
-@@ -0,0 +1,817 @@
++++ linux/fs/aufs/f_op.c 2018-08-12 23:43:05.456791299 +0200
+@@ -0,0 +1,818 @@
++// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 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 bindex;
+
+ finfo = au_fi(file);
-+ au_sphl_del(&finfo->fi_hlist,
-+ &au_sbi(file->f_path.dentry->d_sb)->si_files);
++ au_hbl_del(&finfo->fi_hlist,
++ &au_sbi(file->f_path.dentry->d_sb)->si_files);
+ bindex = finfo->fi_btop;
+ if (bindex >= 0)
+ au_set_h_fptr(file, bindex, NULL);
+};
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 2017-07-29 12:14:25.903042072 +0200
-@@ -0,0 +1,400 @@
++++ linux/fs/aufs/fstype.h 2018-08-12 23:43:05.456791299 +0200
+@@ -0,0 +1,401 @@
++/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+
+/*
+ * test if the @inode is nfs with 'noacl' option
-+ * NFS always sets MS_POSIXACL regardless its mount option 'noacl.'
++ * NFS always sets SB_POSIXACL regardless its mount option 'noacl.'
+ */
+static inline int au_test_nfs_noacl(struct inode *inode)
+{
+
+#endif /* __KERNEL__ */
+#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
+@@ -0,0 +1,65 @@
++/* SPDX-License-Identifier: GPL-2.0 */
++/*
++ * Copyright (C) 2017-2018 Junjiro R. Okajima
++ *
++ * This program, aufs is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program. If not, see <http://www.gnu.org/licenses/>.
++ */
++
++/*
++ * helpers for hlist_bl.h
++ */
++
++#ifndef __AUFS_HBL_H__
++#define __AUFS_HBL_H__
++
++#ifdef __KERNEL__
++
++#include <linux/list_bl.h>
++
++static inline void au_hbl_add(struct hlist_bl_node *node,
++ struct hlist_bl_head *hbl)
++{
++ hlist_bl_lock(hbl);
++ hlist_bl_add_head(node, hbl);
++ hlist_bl_unlock(hbl);
++}
++
++static inline void au_hbl_del(struct hlist_bl_node *node,
++ struct hlist_bl_head *hbl)
++{
++ hlist_bl_lock(hbl);
++ hlist_bl_del(node);
++ hlist_bl_unlock(hbl);
++}
++
++#define au_hbl_for_each(pos, head) \
++ for (pos = hlist_bl_first(head); \
++ pos; \
++ pos = pos->next)
++
++static inline unsigned long au_hbl_count(struct hlist_bl_head *hbl)
++{
++ unsigned long cnt;
++ struct hlist_bl_node *pos;
++
++ cnt = 0;
++ hlist_bl_lock(hbl);
++ au_hbl_for_each(pos, hbl)
++ cnt++;
++ hlist_bl_unlock(hbl);
++ return cnt;
++}
++
++#endif /* __KERNEL__ */
++#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 2017-07-31 10:12:14.139177930 +0200
-@@ -0,0 +1,287 @@
++++ linux/fs/aufs/hfsnotify.c 2018-08-12 23:43:05.456791299 +0200
+@@ -0,0 +1,290 @@
++// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 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
+ hn_mark);
+ /* AuDbg("here\n"); */
+ au_cache_free_hnotify(hn);
-+ smp_mb__before_atomic();
++ smp_mb__before_atomic(); /* for atomic64_dec */
+ if (atomic64_dec_and_test(&au_hfsn_ifree))
+ wake_up(&au_hfsn_wq);
+}
+ AuDebugOn(!br->br_hfsn);
+
+ mark = &hn->hn_mark;
-+ fsnotify_init_mark(mark, au_hfsn_free_mark);
++ fsnotify_init_mark(mark, br->br_hfsn->hfsn_group);
+ mark->mask = AuHfsnMask;
+ /*
+ * by udba rename or rmdir, aufs assign a new inode to the known
+ * h_inode, so specify 1 to allow dups.
+ */
+ lockdep_off();
-+ err = fsnotify_add_mark(mark, br->br_hfsn->hfsn_group, hinode->hi_inode,
-+ /*mnt*/NULL, /*allow_dups*/1);
++ err = fsnotify_add_mark(mark, hinode->hi_inode, /*mnt*/NULL,
++ /*allow_dups*/1);
+ lockdep_on();
+
+ return err;
+
+static int au_hfsn_handle_event(struct fsnotify_group *group,
+ struct inode *inode,
-+ struct fsnotify_mark *inode_mark,
-+ struct fsnotify_mark *vfsmount_mark,
+ u32 mask, const void *data, int data_type,
-+ const unsigned char *file_name, u32 cookie)
++ const unsigned char *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);
+
+ au_debug_off();
+#endif
+
++ 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);
+
+static struct fsnotify_ops au_hfsn_ops = {
+ .handle_event = au_hfsn_handle_event,
-+ .free_group_priv = au_hfsn_free_group
++ .free_group_priv = au_hfsn_free_group,
++ .free_mark = au_hfsn_free_mark
+};
+
+/* ---------------------------------------------------------------------- */
+};
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 2017-07-29 12:14:25.903042072 +0200
-@@ -0,0 +1,56 @@
++++ linux/fs/aufs/hfsplus.c 2018-08-12 23:43:05.456791299 +0200
+@@ -0,0 +1,57 @@
++// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2010-2017 Junjiro R. Okajima
++ * Copyright (C) 2010-2018 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 2017-07-29 12:14:25.903042072 +0200
-@@ -0,0 +1,711 @@
++++ linux/fs/aufs/hnotify.c 2018-08-12 23:43:05.456791299 +0200
+@@ -0,0 +1,720 @@
++// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 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 (au_ftest_hnjob(a->flags, TRYXINO0)
+ && a->inode
+ && a->h_inode) {
-+ inode_lock_nested(a->h_inode, AuLsc_I_CHILD);
++ inode_lock_shared_nested(a->h_inode, AuLsc_I_CHILD);
+ if (!a->h_inode->i_nlink
+ && !(a->h_inode->i_state & I_LINKABLE))
+ hn_xino(a->inode, a->h_inode); /* ignore this error */
-+ inode_unlock(a->h_inode);
++ inode_unlock_shared(a->h_inode);
+ }
+
+ /* make the generation obsolete */
+ if (vdir)
+ vdir->vd_jiffy = 0;
+ /* IMustLock(a->inode); */
-+ /* a->inode->i_version++; */
++ /* inode_inc_iversion(a->inode); */
+ }
+
+ /* can do nothing but warn */
+ AuDebugOn(!sbinfo);
+ si_write_lock(sb, AuLock_NOPLMW);
+
++ if (au_opt_test(sbinfo->si_mntflags, DIRREN))
++ switch (a->mask & FS_EVENTS_POSS_ON_CHILD) {
++ case FS_MOVED_FROM:
++ case FS_MOVED_TO:
++ AuWarn1("DIRREN with UDBA may not work correctly "
++ "for the direct rename(2)\n");
++ }
++
+ ii_read_lock_parent(a->dir);
+ bfound = -1;
+ bbot = au_ibbot(a->dir);
+}
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 2017-07-29 12:14:25.903042072 +0200
-@@ -0,0 +1,285 @@
++++ linux/fs/aufs/iinfo.c 2018-08-12 23:43:05.460124736 +0200
+@@ -0,0 +1,286 @@
++// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+}
diff -urN /usr/share/empty/fs/aufs/inode.c linux/fs/aufs/inode.c
--- /usr/share/empty/fs/aufs/inode.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/inode.c 2017-07-29 12:14:25.903042072 +0200
-@@ -0,0 +1,527 @@
++++ linux/fs/aufs/inode.c 2018-08-12 23:43:05.460124736 +0200
+@@ -0,0 +1,528 @@
++// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ au_cpup_attr_all(inode, /*force*/0);
+ au_update_iigen(inode, /*half*/1);
+ if (do_version)
-+ inode->i_version++;
++ inode_inc_iversion(inode);
+}
+
+static int au_ii_refresh(struct inode *inode, int *update)
+}
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 2017-07-29 12:14:25.903042072 +0200
-@@ -0,0 +1,686 @@
++++ linux/fs/aufs/inode.h 2018-08-12 23:43:05.460124736 +0200
+@@ -0,0 +1,696 @@
++/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+struct au_icntnr {
+ struct au_iinfo iinfo;
+ struct inode vfs_inode;
-+ struct hlist_node plink;
++ struct hlist_bl_node plink;
+} ____cacheline_aligned_in_smp;
+
+/* au_pin flags */
+#undef AuWriteLockFunc
+#undef AuRWLockFuncs
+
-+/*
-+ * ii_read_unlock, ii_write_unlock, ii_downgrade_lock
-+ */
-+AuSimpleUnlockRwsemFuncs(ii, struct inode *i, &au_ii(i)->ii_rwsem);
++#define ii_read_unlock(i) au_rw_read_unlock(&au_ii(i)->ii_rwsem)
++#define ii_write_unlock(i) au_rw_write_unlock(&au_ii(i)->ii_rwsem)
++#define ii_downgrade_lock(i) au_rw_dgrade_lock(&au_ii(i)->ii_rwsem)
+
+#define IiMustNoWaiters(i) AuRwMustNoWaiters(&au_ii(i)->ii_rwsem)
+#define IiMustAnyLock(i) AuRwMustAnyLock(&au_ii(i)->ii_rwsem)
+ au_hn_suspend(hdir);
+}
+
++#if 0 /* unused */
++#include "vfsub.h"
++static inline void au_hn_inode_lock_shared_nested(struct au_hinode *hdir,
++ unsigned int sc)
++{
++ inode_lock_shared_nested(hdir->hi_inode, sc);
++ au_hn_suspend(hdir);
++}
++#endif
++
+static inline void au_hn_inode_unlock(struct au_hinode *hdir)
+{
+ au_hn_resume(hdir);
+#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 2017-07-29 12:14:25.903042072 +0200
-@@ -0,0 +1,219 @@
++++ linux/fs/aufs/ioctl.c 2018-08-12 23:43:05.460124736 +0200
+@@ -0,0 +1,220 @@
++// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 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 2017-07-29 12:14:25.903042072 +0200
-@@ -0,0 +1,920 @@
++++ linux/fs/aufs/i_op_add.c 2018-08-12 23:43:05.456791299 +0200
+@@ -0,0 +1,921 @@
++// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ dir = d_inode(dentry->d_parent); /* dir inode is locked */
+ IMustLock(dir);
+ au_dir_ts(dir, bindex);
-+ dir->i_version++;
++ inode_inc_iversion(dir);
+ au_fhsm_wrote(sb, bindex, /*force*/0);
+ return 0; /* success */
+ }
+ }
+
+ au_dir_ts(dir, a->bdst);
-+ dir->i_version++;
++ inode_inc_iversion(dir);
+ inc_nlink(inode);
+ inode->i_ctime = dir->i_ctime;
+ d_instantiate(dentry, au_igrab(inode));
+}
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 2017-07-29 12:14:25.903042072 +0200
-@@ -0,0 +1,1452 @@
++++ linux/fs/aufs/i_op.c 2018-08-12 23:43:05.456791299 +0200
+@@ -0,0 +1,1460 @@
++// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 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 (((mask & MAY_EXEC)
+ && S_ISREG(h_inode->i_mode)
+ && (path_noexec(h_path)
-+ || !(h_inode->i_mode & S_IXUGO))))
++ || !(h_inode->i_mode & 0111))))
+ goto out;
+
+ /*
+ * - skip the lower fs test in the case of write to ro branch.
+ * - nfs dir permission write check is optimized, but a policy for
+ * link/rename requires a real check.
-+ * - nfs always sets MS_POSIXACL regardless its mount option 'noacl.'
++ * - nfs always sets SB_POSIXACL regardless its mount option 'noacl.'
+ * in this case, generic_permission() returns -EOPNOTSUPP.
+ */
+ if ((write_mask && !au_br_writable(brperm))
+ && write_mask && !(mask & MAY_READ))
+ || !h_inode->i_op->permission) {
+ /* AuLabel(generic_permission); */
-+ /* AuDbg("get_acl %pf\n", h_inode->i_op->get_acl); */
++ /* AuDbg("get_acl %ps\n", h_inode->i_op->get_acl); */
+ err = generic_permission(h_inode, mask);
+ if (err == -EOPNOTSUPP && au_test_nfs_noacl(h_inode))
+ err = h_inode->i_op->permission(h_inode, mask);
+/* ---------------------------------------------------------------------- */
+
+struct aopen_node {
-+ struct hlist_node hlist;
++ struct hlist_bl_node hblist;
+ struct file *file, *h_file;
+};
+
+static int au_do_aopen(struct inode *inode, struct file *file)
+{
-+ struct au_sphlhead *aopen;
++ struct hlist_bl_head *aopen;
++ struct hlist_bl_node *pos;
+ struct aopen_node *node;
+ struct au_do_open_args args = {
-+ .no_lock = 1,
-+ .open = au_do_open_nondir
++ .aopen = 1,
++ .open = au_do_open_nondir
+ };
+
+ aopen = &au_sbi(inode->i_sb)->si_aopen;
-+ spin_lock(&aopen->spin);
-+ hlist_for_each_entry(node, &aopen->head, hlist)
++ hlist_bl_lock(aopen);
++ hlist_bl_for_each_entry(node, pos, aopen, hblist)
+ if (node->file == file) {
+ args.h_file = node->h_file;
+ break;
+ }
-+ spin_unlock(&aopen->spin);
++ hlist_bl_unlock(aopen);
+ /* AuDebugOn(!args.h_file); */
+
+ return au_do_open(file, &args);
+ struct file *file, unsigned int open_flag,
+ umode_t create_mode, int *opened)
+{
-+ int err, h_opened = *opened;
++ int err, unlocked, h_opened = *opened;
+ unsigned int lkup_flags;
+ struct dentry *parent, *d;
-+ struct au_sphlhead *aopen;
++ struct hlist_bl_head *aopen;
+ struct vfsub_aopen_args args = {
+ .open_flag = open_flag,
+ .create_mode = create_mode,
+ || !(open_flag & O_CREAT))
+ goto out_no_open;
+
++ unlocked = 0;
+ err = aufs_read_lock(dentry, AuLock_DW | AuLock_FLUSH | AuLock_GEN);
+ if (unlikely(err))
+ goto out;
+ put_filp(args.file);
+ goto out_unlock;
+ }
++ di_write_unlock(parent);
++ di_write_unlock(dentry);
++ unlocked = 1;
+
+ /* some filesystems don't set FILE_CREATED while succeeded? */
+ *opened |= FILE_CREATED;
+ args.file = NULL;
+ }
+ aopen = &au_sbi(dir->i_sb)->si_aopen;
-+ au_sphl_add(&aopen_node.hlist, aopen);
++ au_hbl_add(&aopen_node.hblist, aopen);
+ err = finish_open(file, dentry, au_do_aopen, opened);
-+ au_sphl_del(&aopen_node.hlist, aopen);
++ au_hbl_del(&aopen_node.hblist, aopen);
+ AuTraceErr(err);
+ AuDbgFile(file);
+ if (aopen_node.h_file)
+ fput(aopen_node.h_file);
+
+out_unlock:
-+ di_write_unlock(parent);
-+ aufs_read_unlock(dentry, AuLock_DW);
++ if (unlocked)
++ si_read_unlock(dentry->d_sb);
++ else {
++ di_write_unlock(parent);
++ aufs_read_unlock(dentry, AuLock_DW);
++ }
+ AuDbgDentry(dentry);
+ if (unlikely(err < 0))
+ goto out;
+ if (!err && add_entry && !au_ftest_wrdir(add_entry, TMPFILE)) {
+ h_parent = au_h_dptr(parent, bcpup);
+ h_dir = d_inode(h_parent);
-+ inode_lock_nested(h_dir, AuLsc_I_PARENT);
++ inode_lock_shared_nested(h_dir, AuLsc_I_PARENT);
+ err = au_lkup_neg(dentry, bcpup, /*wh*/0);
+ /* todo: no unlock here */
-+ inode_unlock(h_dir);
++ inode_unlock_shared(h_dir);
+
+ AuDbg("bcpup %d\n", bcpup);
+ if (!err) {
+ a->h_path.dentry = au_h_dptr(dentry, btop);
+ a->h_inode = d_inode(a->h_path.dentry);
+ if (ia && (ia->ia_valid & ATTR_SIZE)) {
-+ inode_lock_nested(a->h_inode, AuLsc_I_CHILD);
++ inode_lock_shared_nested(a->h_inode, AuLsc_I_CHILD);
+ if (ia->ia_size < i_size_read(a->h_inode))
+ sz = ia->ia_size;
-+ inode_unlock(a->h_inode);
++ inode_unlock_shared(a->h_inode);
+ }
+
+ hi_wh = NULL;
+ goto out_unlock;
+
+ err = 0;
-+ AuDbg("%pf\n", h_inode->i_op->get_link);
++ AuDbg("%ps\n", h_inode->i_op->get_link);
+ AuDbgDentry(h_dentry);
+ ret = vfs_get_link(h_dentry, done);
+ dput(h_dentry);
+ return (inode->i_mode & (S_IFBLK | S_IFCHR | S_IFIFO | S_IFSOCK));
+}
+
-+static int aufs_update_time(struct inode *inode, struct timespec *ts, int flags)
++static int aufs_update_time(struct inode *inode, struct timespec64 *ts, int flags)
+{
+ int err;
+ aufs_bindex_t bindex;
+ lockdep_off();
+ si_read_lock(sb, AuLock_FLUSH);
+ ii_write_lock_child(inode);
-+ lockdep_on();
+
+ err = 0;
+ bindex = au_ibtop(inode);
+ AuDebugOn(1);
+ }
+
-+ lockdep_off();
+ if (!err)
+ au_cpup_attr_timesizes(inode);
+ ii_write_unlock(inode);
+};
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 2017-07-29 12:14:25.903042072 +0200
-@@ -0,0 +1,511 @@
++++ linux/fs/aufs/i_op_del.c 2018-08-12 23:43:05.456791299 +0200
+@@ -0,0 +1,512 @@
++// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 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->i_ctime = dir->i_ctime;
+
+ au_dir_ts(dir, bindex);
-+ dir->i_version++;
++ inode_inc_iversion(dir);
+}
+
+/*
+}
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 2017-07-29 12:14:25.903042072 +0200
-@@ -0,0 +1,1165 @@
++++ linux/fs/aufs/i_op_ren.c 2018-08-12 23:43:05.460124736 +0200
+@@ -0,0 +1,1247 @@
++// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 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 AuRen_DT_DSTDIR (1 << 6)
+#define AuRen_DIROPQ_SRC (1 << 7)
+#define AuRen_DIROPQ_DST (1 << 8)
++#define AuRen_DIRREN (1 << 9)
++#define AuRen_DROPPED_SRC (1 << 10)
++#define AuRen_DROPPED_DST (1 << 11)
+#define au_ftest_ren(flags, name) ((flags) & AuRen_##name)
+#define au_fset_ren(flags, name) \
+ do { (flags) |= AuRen_##name; } while (0)
+#define au_fclr_ren(flags, name) \
+ do { (flags) &= ~AuRen_##name; } while (0)
+
++#ifndef CONFIG_AUFS_DIRREN
++#undef AuRen_DIRREN
++#define AuRen_DIRREN 0
++#endif
++
+struct au_ren_args {
+ struct {
+ struct dentry *dentry, *h_dentry, *parent, *h_parent,
+
+ struct au_whtmp_rmdir *thargs;
+ struct dentry *h_dst;
++ struct au_hinode *h_root;
+};
+
+/* ---------------------------------------------------------------------- */
+ d = a->dst_dentry; /* already renamed on the branch */
+ always = !!au_opt_test(au_mntflags(d->d_sb), ALWAYS_DIROPQ);
+ if (au_ftest_ren(a->auren_flags, ISDIR_SRC)
++ && !au_ftest_ren(a->auren_flags, DIRREN)
+ && a->btgt != au_dbdiropq(a->src_dentry)
+ && (a->dst_wh_dentry
+ || a->btgt <= au_dbdiropq(d)
+ /* prepare workqueue args for asynchronous rmdir */
+ h_d = a->dst_h_dentry;
+ if (au_ftest_ren(a->auren_flags, ISDIR_DST)
++ /* && !au_ftest_ren(a->auren_flags, DIRREN) */
+ && d_is_positive(h_d)) {
+ err = -ENOMEM;
+ a->thargs = au_whtmp_rmdir_alloc(a->src_dentry->d_sb,
+ }
+
+ BUG_ON(d_is_positive(a->dst_h_dentry) && a->src_btop != a->btgt);
++#if 0
++ BUG_ON(!au_ftest_ren(a->auren_flags, DIRREN)
++ && d_is_positive(a->dst_h_dentry)
++ && a->src_btop != a->btgt);
++#endif
+
+ /* rename by vfs_rename or cpup */
+ err = au_ren_or_cpup(a);
+}
+
+/*
-+ * test if @dentry dir can be rename source or not.
-+ * if it can, return 0 and @children is filled.
++ * test if @a->src_dentry dir can be rename source or not.
++ * if it can, return 0.
+ * success means,
+ * - it is a logically empty dir.
+ * - or, it exists on writable branch and has no children including whiteouts
-+ * on the lower branch.
++ * on the lower branch unless DIRREN is on.
+ */
-+static int may_rename_srcdir(struct dentry *dentry, aufs_bindex_t btgt)
++static int may_rename_srcdir(struct au_ren_args *a)
+{
+ int err;
+ unsigned int rdhash;
-+ aufs_bindex_t btop;
++ aufs_bindex_t btop, btgt;
++ struct dentry *dentry;
++ struct super_block *sb;
++ struct au_sbinfo *sbinfo;
++
++ dentry = a->src_dentry;
++ sb = dentry->d_sb;
++ sbinfo = au_sbi(sb);
++ if (au_opt_test(sbinfo->si_mntflags, DIRREN))
++ au_fset_ren(a->auren_flags, DIRREN);
+
++ btgt = a->btgt;
+ btop = au_dbtop(dentry);
+ if (btop != btgt) {
+ struct au_nhash whlist;
+
-+ SiMustAnyLock(dentry->d_sb);
-+ rdhash = au_sbi(dentry->d_sb)->si_rdhash;
++ SiMustAnyLock(sb);
++ rdhash = sbinfo->si_rdhash;
+ if (!rdhash)
+ rdhash = au_rdhash_est(au_dir_size(/*file*/NULL,
+ dentry));
+
+out:
+ if (err == -ENOTEMPTY) {
-+ AuWarn1("renaming dir who has child(ren) on multiple branches,"
-+ " is not supported\n");
-+ err = -EXDEV;
++ if (au_ftest_ren(a->auren_flags, DIRREN)) {
++ err = 0;
++ } else {
++ AuWarn1("renaming dir who has child(ren) on multiple "
++ "branches, is not supported\n");
++ err = -EXDEV;
++ }
+ }
+ return err;
+}
+ err = may_rename_dstdir(d, &a->whlist);
+ au_set_dbtop(d, a->btgt);
+ } else
-+ err = may_rename_srcdir(d, a->btgt);
++ err = may_rename_srcdir(a);
+ }
+ a->dst_h_dentry = au_h_dptr(d, au_dbtop(d));
+ if (unlikely(err))
+ d = a->src_dentry;
+ a->src_h_dentry = au_h_dptr(d, au_dbtop(d));
+ if (au_ftest_ren(a->auren_flags, ISDIR_SRC)) {
-+ err = may_rename_srcdir(d, a->btgt);
++ err = may_rename_srcdir(a);
+ if (unlikely(err)) {
+ au_nhash_wh_free(&a->whlist);
+ a->whlist.nh_num = 0;
+{
+ vfsub_unlock_rename(a->src_h_parent, a->src_hdir,
+ a->dst_h_parent, a->dst_hdir);
++ if (au_ftest_ren(a->auren_flags, DIRREN)
++ && a->h_root)
++ au_hn_inode_unlock(a->h_root);
+ if (au_ftest_ren(a->auren_flags, MNT_WRITE))
+ vfsub_mnt_drop_write(au_br_mnt(a->br));
+}
+ if (unlikely(err))
+ goto out;
+ au_fset_ren(a->auren_flags, MNT_WRITE);
++ if (au_ftest_ren(a->auren_flags, DIRREN)) {
++ struct dentry *root;
++ struct inode *dir;
++
++ /*
++ * sbinfo is already locked, so this ii_read_lock is
++ * unnecessary. but our debugging feature checks it.
++ */
++ root = a->src_inode->i_sb->s_root;
++ if (root != a->src_parent && root != a->dst_parent) {
++ dir = d_inode(root);
++ ii_read_lock_parent3(dir);
++ a->h_root = au_hi(dir, a->btgt);
++ ii_read_unlock(dir);
++ au_hn_inode_lock_nested(a->h_root, AuLsc_I_PARENT3);
++ }
++ }
+ a->h_trap = vfsub_lock_rename(a->src_h_parent, a->src_hdir,
+ a->dst_h_parent, a->dst_hdir);
+ udba = au_opt_udba(a->src_dentry->d_sb);
+ struct inode *dir;
+
+ dir = a->dst_dir;
-+ dir->i_version++;
++ inode_inc_iversion(dir);
+ if (au_ftest_ren(a->auren_flags, ISDIR_SRC)) {
+ /* is this updating defined in POSIX? */
+ au_cpup_attr_timesizes(a->src_inode);
+
+ if (a->exchange) {
+ dir = a->src_dir;
-+ dir->i_version++;
++ inode_inc_iversion(dir);
+ if (au_ftest_ren(a->auren_flags, ISDIR_DST)) {
+ /* is this updating defined in POSIX? */
+ au_cpup_attr_timesizes(a->dst_inode);
+ return;
+
+ dir = a->src_dir;
-+ dir->i_version++;
++ inode_inc_iversion(dir);
+ if (au_ftest_ren(a->auren_flags, ISDIR_SRC))
+ au_cpup_attr_nlink(dir, /*force*/1);
+ au_dir_ts(dir, a->btgt);
+ au_update_dbrange(d, /*do_put_zero*/0);
+ }
+
++ if (a->exchange
++ || au_ftest_ren(a->auren_flags, DIRREN)) {
++ d_drop(a->src_dentry);
++ if (au_ftest_ren(a->auren_flags, DIRREN))
++ au_set_dbwh(a->src_dentry, -1);
++ return;
++ }
++
+ d = a->src_dentry;
-+ if (!a->exchange) {
-+ au_set_dbwh(d, -1);
-+ bbot = au_dbbot(d);
-+ for (bindex = a->btgt + 1; bindex <= bbot; bindex++) {
-+ h_d = au_h_dptr(d, bindex);
-+ if (h_d)
-+ au_set_h_dptr(d, bindex, NULL);
-+ }
-+ au_set_dbbot(d, a->btgt);
++ au_set_dbwh(d, -1);
++ bbot = au_dbbot(d);
++ for (bindex = a->btgt + 1; bindex <= bbot; bindex++) {
++ h_d = au_h_dptr(d, bindex);
++ if (h_d)
++ au_set_h_dptr(d, bindex, NULL);
++ }
++ au_set_dbbot(d, a->btgt);
+
-+ sb = d->d_sb;
-+ i = a->src_inode;
-+ if (au_opt_test(au_mntflags(sb), PLINK) && au_plink_test(i))
-+ return; /* success */
++ sb = d->d_sb;
++ i = a->src_inode;
++ if (au_opt_test(au_mntflags(sb), PLINK) && au_plink_test(i))
++ return; /* success */
+
-+ bbot = au_ibbot(i);
-+ for (bindex = a->btgt + 1; bindex <= bbot; bindex++) {
-+ h_i = au_h_iptr(i, bindex);
-+ if (h_i) {
-+ au_xino_write(sb, bindex, h_i->i_ino, /*ino*/0);
-+ /* ignore this error */
-+ au_set_h_iptr(i, bindex, NULL, 0);
-+ }
++ bbot = au_ibbot(i);
++ for (bindex = a->btgt + 1; bindex <= bbot; bindex++) {
++ h_i = au_h_iptr(i, bindex);
++ if (h_i) {
++ au_xino_write(sb, bindex, h_i->i_ino, /*ino*/0);
++ /* ignore this error */
++ au_set_h_iptr(i, bindex, NULL, 0);
+ }
-+ au_set_ibbot(i, a->btgt);
+ }
-+ d_drop(a->src_dentry);
++ au_set_ibbot(i, a->btgt);
+}
+
+/* ---------------------------------------------------------------------- */
+ unsigned int _flags)
+{
+ int err, lock_flags;
++ void *rev;
+ /* reduce stack space */
+ struct au_ren_args *a;
+ struct au_pin pin;
+ goto out_free;
+ lock_flags |= AuLock_DIRS;
+ }
-+ err = aufs_read_and_write_lock2(a->dst_dentry, a->src_dentry, lock_flags);
++ err = aufs_read_and_write_lock2(a->dst_dentry, a->src_dentry,
++ lock_flags);
+ if (unlikely(err))
+ goto out_free;
+
+ /* store timestamps to be revertible */
+ au_ren_dt(a);
+
++ /* store dirren info */
++ if (au_ftest_ren(a->auren_flags, DIRREN)) {
++ err = au_dr_rename(a->src_dentry, a->btgt,
++ &a->dst_dentry->d_name, &rev);
++ AuTraceErr(err);
++ if (unlikely(err))
++ goto out_dt;
++ }
++
+ /* here we go */
+ err = do_rename(a);
+ if (unlikely(err))
-+ goto out_dt;
++ goto out_dirren;
++
++ if (au_ftest_ren(a->auren_flags, DIRREN))
++ au_dr_rename_fin(a->src_dentry, a->btgt, rev);
+
+ /* update dir attributes */
+ au_ren_refresh_dir(a);
+
+ goto out_hdir; /* success */
+
++out_dirren:
++ if (au_ftest_ren(a->auren_flags, DIRREN))
++ au_dr_rename_rev(a->src_dentry, a->btgt, rev);
+out_dt:
+ au_ren_rev_dt(err, a);
+out_hdir:
+ }
+out_parent:
+ if (!err) {
++ if (d_unhashed(a->src_dentry))
++ au_fset_ren(a->auren_flags, DROPPED_SRC);
++ if (d_unhashed(a->dst_dentry))
++ au_fset_ren(a->auren_flags, DROPPED_DST);
+ if (!a->exchange)
+ d_move(a->src_dentry, a->dst_dentry);
-+ else
++ else {
+ d_exchange(a->src_dentry, a->dst_dentry);
++ if (au_ftest_ren(a->auren_flags, DROPPED_DST))
++ d_drop(a->dst_dentry);
++ }
++ if (au_ftest_ren(a->auren_flags, DROPPED_SRC))
++ d_drop(a->src_dentry);
+ } else {
+ au_update_dbtop(a->dst_dentry);
+ if (!a->dst_inode)
+}
diff -urN /usr/share/empty/fs/aufs/Kconfig linux/fs/aufs/Kconfig
--- /usr/share/empty/fs/aufs/Kconfig 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/Kconfig 2017-07-29 12:14:25.896375188 +0200
-@@ -0,0 +1,185 @@
++++ linux/fs/aufs/Kconfig 2018-06-04 09:08:09.181412645 +0200
+@@ -0,0 +1,199 @@
++# SPDX-License-Identifier: GPL-2.0
+config AUFS_FS
+ tristate "Aufs (Advanced multi layered unification filesystem) support"
+ help
+ shows better performance in most cases.
+ See detail in aufs.5.
+
++config AUFS_DIRREN
++ bool "Workaround for rename(2)-ing a directory"
++ help
++ By default, aufs returns EXDEV error in renameing a dir who has
++ his child on the lower branch, since it is a bad idea to issue
++ rename(2) internally for every lower branch. But user may not
++ accept this behaviour. So here is a workaround to allow such
++ rename(2) and store some extra infromation on the writable
++ branch. Obviously this costs high (and I don't like it).
++ To use this feature, you need to enable this configuration AND
++ to specify the mount option `dirren.'
++ See details in aufs.5 and the design documents.
++
+config AUFS_SHWH
+ bool "Show whiteouts"
+ help
+endif
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 2017-07-29 12:14:25.903042072 +0200
-@@ -0,0 +1,147 @@
++++ linux/fs/aufs/loop.c 2018-08-12 23:43:05.460124736 +0200
+@@ -0,0 +1,148 @@
++// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+}
diff -urN /usr/share/empty/fs/aufs/loop.h linux/fs/aufs/loop.h
--- /usr/share/empty/fs/aufs/loop.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/loop.h 2017-07-29 12:14:25.903042072 +0200
-@@ -0,0 +1,52 @@
++++ linux/fs/aufs/loop.h 2018-08-12 23:43:05.460124736 +0200
+@@ -0,0 +1,53 @@
++/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+#endif /* __AUFS_LOOP_H__ */
diff -urN /usr/share/empty/fs/aufs/magic.mk linux/fs/aufs/magic.mk
--- /usr/share/empty/fs/aufs/magic.mk 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/magic.mk 2017-07-29 12:14:25.903042072 +0200
-@@ -0,0 +1,30 @@
++++ linux/fs/aufs/magic.mk 2018-06-04 09:08:09.188079511 +0200
+@@ -0,0 +1,31 @@
++# SPDX-License-Identifier: GPL-2.0
+
+# defined in ${srctree}/fs/fuse/inode.c
+# tristate
+endif
diff -urN /usr/share/empty/fs/aufs/Makefile linux/fs/aufs/Makefile
--- /usr/share/empty/fs/aufs/Makefile 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/Makefile 2017-07-29 12:14:25.896375188 +0200
-@@ -0,0 +1,44 @@
++++ linux/fs/aufs/Makefile 2018-06-04 09:08:09.181412645 +0200
+@@ -0,0 +1,46 @@
++# SPDX-License-Identifier: GPL-2.0
+
+include ${src}/magic.mk
+ifeq (${CONFIG_AUFS_FS},m)
+aufs-$(CONFIG_AUFS_EXPORT) += export.o
+aufs-$(CONFIG_AUFS_XATTR) += xattr.o
+aufs-$(CONFIG_FS_POSIX_ACL) += posix_acl.o
++aufs-$(CONFIG_AUFS_DIRREN) += dirren.o
+aufs-$(CONFIG_AUFS_FHSM) += fhsm.o
+aufs-$(CONFIG_AUFS_POLL) += poll.o
+aufs-$(CONFIG_AUFS_RDU) += rdu.o
+aufs-$(CONFIG_AUFS_MAGIC_SYSRQ) += sysrq.o
diff -urN /usr/share/empty/fs/aufs/module.c linux/fs/aufs/module.c
--- /usr/share/empty/fs/aufs/module.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/module.c 2017-07-29 12:14:25.903042072 +0200
-@@ -0,0 +1,266 @@
++++ linux/fs/aufs/module.c 2018-08-12 23:43:05.460124736 +0200
+@@ -0,0 +1,273 @@
++// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 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
+ * iterate_supers_type() doesn't protect us from
+ * remounting (branch management)
+ */
-+struct au_sphlhead au_sbilist;
++struct hlist_bl_head au_sbilist;
+#endif
+
+/*
+/* this module parameter has no meaning when SYSFS is disabled */
+int sysaufs_brs = 1;
+MODULE_PARM_DESC(brs, "use <sysfs>/fs/aufs/si_*/brN");
-+module_param_named(brs, sysaufs_brs, int, S_IRUGO);
++module_param_named(brs, sysaufs_brs, int, 0444);
+
+/* this module parameter has no meaning when USER_NS is disabled */
+bool au_userns;
+MODULE_PARM_DESC(allow_userns, "allow unprivileged to mount under userns");
-+module_param_named(allow_userns, au_userns, bool, S_IRUGO);
++module_param_named(allow_userns, au_userns, bool, 0444);
+
+/* ---------------------------------------------------------------------- */
+
+ err = sysaufs_init();
+ if (unlikely(err))
+ goto out;
-+ err = au_procfs_init();
++ err = dbgaufs_init();
+ if (unlikely(err))
+ goto out_sysaufs;
++ err = au_procfs_init();
++ if (unlikely(err))
++ goto out_dbgaufs;
+ err = au_wkq_init();
+ if (unlikely(err))
+ goto out_procfs;
+ au_wkq_fin();
+out_procfs:
+ au_procfs_fin();
++out_dbgaufs:
++ dbgaufs_fin();
+out_sysaufs:
+ sysaufs_fin();
+ au_dy_fin();
+ au_loopback_fin();
+ au_wkq_fin();
+ au_procfs_fin();
++ dbgaufs_fin();
+ sysaufs_fin();
+ au_dy_fin();
+}
+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 2017-07-29 12:14:25.903042072 +0200
-@@ -0,0 +1,101 @@
++++ linux/fs/aufs/module.h 2018-08-12 23:43:05.460124736 +0200
+@@ -0,0 +1,102 @@
++/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+#endif /* __AUFS_MODULE_H__ */
diff -urN /usr/share/empty/fs/aufs/mvdown.c linux/fs/aufs/mvdown.c
--- /usr/share/empty/fs/aufs/mvdown.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/mvdown.c 2017-07-29 12:14:25.903042072 +0200
-@@ -0,0 +1,704 @@
++++ linux/fs/aufs/mvdown.c 2018-08-12 23:43:05.460124736 +0200
+@@ -0,0 +1,705 @@
++// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2011-2017 Junjiro R. Okajima
++ * Copyright (C) 2011-2018 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
+ for (bindex++; bindex <= bbot; bindex++) {
+ br = au_sbr(sb, bindex);
+ if (au_br_fhsm(br->br_perm)
-+ && (!(au_br_sb(br)->s_flags & MS_RDONLY)))
++ && !sb_rdonly(au_br_sb(br)))
+ return bindex;
+ }
+ else if (!(a->mvdown.flags & AUFS_MVDOWN_ROLOWER))
+ else
+ for (bindex++; bindex <= bbot; bindex++) {
+ br = au_sbr(sb, bindex);
-+ if (!(au_br_sb(br)->s_flags & MS_RDONLY)) {
++ if (!sb_rdonly(au_br_sb(br))) {
+ if (au_br_rdonly(br))
+ a->mvdown.flags
+ |= AUFS_MVDOWN_ROLOWER_R;
+}
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 2017-07-29 12:14:25.903042072 +0200
-@@ -0,0 +1,1846 @@
++++ linux/fs/aufs/opts.c 2018-08-12 23:43:05.460124736 +0200
+@@ -0,0 +1,1891 @@
++// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 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
+ Opt_verbose, Opt_noverbose,
+ Opt_sum, Opt_nosum, Opt_wsum,
+ Opt_dirperm1, Opt_nodirperm1,
++ Opt_dirren, Opt_nodirren,
+ Opt_acl, Opt_noacl,
+ Opt_tail, Opt_ignore, Opt_ignore_silent, Opt_err
+};
+ {Opt_dio, "dio"},
+ {Opt_nodio, "nodio"},
+
++#ifdef CONFIG_AUFS_DIRREN
++ {Opt_dirren, "dirren"},
++ {Opt_nodirren, "nodirren"},
++#else
++ {Opt_ignore, "dirren"},
++ {Opt_ignore_silent, "nodirren"},
++#endif
++
+#ifdef CONFIG_AUFS_FHSM
+ {Opt_fhsm_sec, "fhsm_sec=%d"},
+#else
-+ {Opt_ignore_silent, "fhsm_sec=%d"},
++ {Opt_ignore, "fhsm_sec=%d"},
+#endif
+
+ {Opt_diropq_a, "diropq=always"},
+
+ /* keep them temporary */
+ {Opt_ignore_silent, "nodlgt"},
-+ {Opt_ignore_silent, "clean_plink"},
++ {Opt_ignore, "clean_plink"},
+
+#ifdef CONFIG_AUFS_SHWH
+ {Opt_shwh, "shwh"},
+ {Opt_acl, "acl"},
+ {Opt_noacl, "noacl"},
+#else
-+ {Opt_ignore_silent, "acl"},
++ {Opt_ignore, "acl"},
+ {Opt_ignore_silent, "noacl"},
+#endif
+
+ case Opt_fhsm_sec:
+ AuDbg("fhsm_sec %u\n", opt->fhsm_second);
+ break;
++ case Opt_dirren:
++ AuLabel(dirren);
++ break;
++ case Opt_nodirren:
++ AuLabel(nodirren);
++ break;
+ case Opt_acl:
+ AuLabel(acl);
+ break;
+ add->perm = AuBrPerm_RO;
+ if (au_test_fs_rr(add->path.dentry->d_sb))
+ add->perm = AuBrPerm_RR;
-+ else if (!bindex && !(sb_flags & MS_RDONLY))
++ else if (!bindex && !(sb_flags & SB_RDONLY))
+ add->perm = AuBrPerm_RW;
+ }
+ opt->type = Opt_add;
+ case Opt_wsum:
+ case Opt_rdblk_def:
+ case Opt_rdhash_def:
++ case Opt_dirren:
++ case Opt_nodirren:
+ case Opt_acl:
+ case Opt_noacl:
+ err = 0;
+ au_fclr_opts(opts->flags, TRUNC_XIB);
+ break;
+
++ case Opt_dirren:
++ err = 1;
++ if (!au_opt_test(sbinfo->si_mntflags, DIRREN)) {
++ err = au_dr_opt_set(sb);
++ if (!err)
++ err = 1;
++ }
++ if (err == 1)
++ au_opt_set(sbinfo->si_mntflags, DIRREN);
++ break;
++ case Opt_nodirren:
++ err = 1;
++ if (au_opt_test(sbinfo->si_mntflags, DIRREN)) {
++ err = au_dr_opt_clr(sb, au_ftest_opts(opts->flags,
++ DR_FLUSHED));
++ if (!err)
++ err = 1;
++ }
++ if (err == 1)
++ au_opt_clr(sbinfo->si_mntflags, DIRREN);
++ break;
++
+ case Opt_acl:
-+ sb->s_flags |= MS_POSIXACL;
++ sb->s_flags |= SB_POSIXACL;
+ break;
+ case Opt_noacl:
-+ sb->s_flags &= ~MS_POSIXACL;
++ sb->s_flags &= ~SB_POSIXACL;
+ break;
+
+ default:
+ err = 0;
+ switch (opt->type) {
+ case Opt_xino:
-+ err = au_xino_set(sb, &opt->xino,
-+ !!au_ftest_opts(opts->flags, REMOUNT));
-+ if (unlikely(err))
-+ break;
-+
-+ *opt_xino = &opt->xino;
+ au_xino_brid_set(sb, -1);
-+
+ /* safe d_parent access */
+ parent = opt->xino.file->f_path.dentry->d_parent;
+ root = sb->s_root;
+ break;
+ }
+ }
++
++ err = au_xino_set(sb, &opt->xino,
++ !!au_ftest_opts(opts->flags, REMOUNT));
++ if (unlikely(err))
++ break;
++
++ *opt_xino = &opt->xino;
+ break;
+
+ case Opt_noxino:
+ au_xino_clr(sb);
-+ au_xino_brid_set(sb, -1);
+ *opt_xino = (void *)-1;
+ break;
+ }
+ sbinfo = au_sbi(sb);
+ AuDebugOn(!(sbinfo->si_mntflags & AuOptMask_UDBA));
+
-+ if (!(sb_flags & MS_RDONLY)) {
++ if (!(sb_flags & SB_RDONLY)) {
+ if (unlikely(!au_br_writable(au_sbr_perm(sb, 0))))
+ pr_warn("first branch should be rw\n");
+ if (unlikely(au_opt_test(sbinfo->si_mntflags, SHWH)))
+ br->br_perm &= ~AuBrAttr_ICEX;
+#if 0
+ if ((br->br_perm & AuBrAttr_ICEX_SEC)
-+ && (au_br_sb(br)->s_flags & MS_NOSEC))
++ && (au_br_sb(br)->s_flags & SB_NOSEC))
+ br->br_perm &= ~AuBrAttr_ICEX_SEC;
+#endif
+
+
+ SiMustWriteLock(sb);
+
-+ err = 0;
++ err = au_dr_opt_flush(sb);
++ if (unlikely(err))
++ goto out;
++ au_fset_opts(opts->flags, DR_FLUSHED);
++
+ dir = d_inode(sb->s_root);
+ sbinfo = au_sbi(sb);
+ opt_xino = NULL;
+ au_fset_opts(opts->flags, REFRESH);
+
+ AuDbg("status 0x%x\n", opts->flags);
++
++out:
+ return err;
+}
+
+}
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 2017-07-29 12:14:25.903042072 +0200
-@@ -0,0 +1,212 @@
++++ linux/fs/aufs/opts.h 2018-08-12 23:43:05.460124736 +0200
+@@ -0,0 +1,225 @@
++/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 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_WARN_PERM (1 << 12) /* warn when add-branch */
+#define AuOpt_VERBOSE (1 << 13) /* busy inode when del-branch */
+#define AuOpt_DIO (1 << 14) /* direct io */
++#define AuOpt_DIRREN (1 << 15) /* directory rename */
+
+#ifndef CONFIG_AUFS_HNOTIFY
+#undef AuOpt_UDBA_HNOTIFY
+#define AuOpt_UDBA_HNOTIFY 0
+#endif
++#ifndef CONFIG_AUFS_DIRREN
++#undef AuOpt_DIRREN
++#define AuOpt_DIRREN 0
++#endif
+#ifndef CONFIG_AUFS_SHWH
+#undef AuOpt_SHWH
+#define AuOpt_SHWH 0
+#define AuOpts_TRUNC_XIB (1 << 2)
+#define AuOpts_REFRESH_DYAOP (1 << 3)
+#define AuOpts_REFRESH_IDOP (1 << 4)
++#define AuOpts_DR_FLUSHED (1 << 5)
+#define au_ftest_opts(flags, name) ((flags) & AuOpts_##name)
+#define au_fset_opts(flags, name) \
+ do { (flags) |= AuOpts_##name; } while (0)
+#define au_fclr_opts(flags, name) \
+ do { (flags) &= ~AuOpts_##name; } while (0)
+
++#ifndef CONFIG_AUFS_DIRREN
++#undef AuOpts_DR_FLUSHED
++#define AuOpts_DR_FLUSHED 0
++#endif
++
+struct au_opts {
+ struct au_opt *opt;
+ int max_opt;
+const char *au_optstr_wbr_create(int wbr_create);
+
+void au_opts_free(struct au_opts *opts);
++struct super_block;
+int au_opts_parse(struct super_block *sb, char *str, struct au_opts *opts);
+int au_opts_verify(struct super_block *sb, unsigned long sb_flags,
+ unsigned int pending);
+#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 2017-07-29 12:14:25.903042072 +0200
-@@ -0,0 +1,514 @@
++++ linux/fs/aufs/plink.c 2018-08-12 23:43:05.460124736 +0200
+@@ -0,0 +1,516 @@
++// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 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 i;
+ struct au_sbinfo *sbinfo;
-+ struct hlist_head *plink_hlist;
++ struct hlist_bl_head *hbl;
++ struct hlist_bl_node *pos;
+ struct au_icntnr *icntnr;
+
+ SiMustAnyLock(sb);
+ AuDebugOn(au_plink_maint(sb, AuLock_NOPLM));
+
+ for (i = 0; i < AuPlink_NHASH; i++) {
-+ plink_hlist = &sbinfo->si_plink[i].head;
-+ rcu_read_lock();
-+ hlist_for_each_entry_rcu(icntnr, plink_hlist, plink)
++ hbl = sbinfo->si_plink + i;
++ hlist_bl_lock(hbl);
++ hlist_bl_for_each_entry(icntnr, pos, hbl, plink)
+ AuDbg("%lu\n", icntnr->vfs_inode.i_ino);
-+ rcu_read_unlock();
++ hlist_bl_unlock(hbl);
+ }
+}
+#endif
+{
+ int found, i;
+ struct au_sbinfo *sbinfo;
-+ struct hlist_head *plink_hlist;
++ struct hlist_bl_head *hbl;
++ struct hlist_bl_node *pos;
+ struct au_icntnr *icntnr;
+
+ sbinfo = au_sbi(inode->i_sb);
+
+ found = 0;
+ i = au_plink_hash(inode->i_ino);
-+ plink_hlist = &sbinfo->si_plink[i].head;
-+ rcu_read_lock();
-+ hlist_for_each_entry_rcu(icntnr, plink_hlist, plink)
++ hbl = sbinfo->si_plink + i;
++ hlist_bl_lock(hbl);
++ hlist_bl_for_each_entry(icntnr, pos, hbl, plink)
+ if (&icntnr->vfs_inode == inode) {
+ found = 1;
+ break;
+ }
-+ rcu_read_unlock();
++ hlist_bl_unlock(hbl);
+ return found;
+}
+
+ struct inode *h_inode;
+
+ h_inode = d_inode(h_parent);
-+ inode_lock_nested(h_inode, AuLsc_I_CHILD2);
++ inode_lock_shared_nested(h_inode, AuLsc_I_CHILD2);
+ h_dentry = vfsub_lkup_one(tgtname, h_parent);
-+ inode_unlock(h_inode);
++ inode_unlock_shared(h_inode);
+ return h_dentry;
+}
+
+{
+ struct super_block *sb;
+ struct au_sbinfo *sbinfo;
-+ struct hlist_head *plink_hlist;
++ struct hlist_bl_head *hbl;
++ struct hlist_bl_node *pos;
+ struct au_icntnr *icntnr;
-+ struct au_sphlhead *sphl;
+ int found, err, cnt, i;
+
+ sb = inode->i_sb;
+ return;
+
+ i = au_plink_hash(inode->i_ino);
-+ sphl = sbinfo->si_plink + i;
-+ plink_hlist = &sphl->head;
++ hbl = sbinfo->si_plink + i;
+ au_igrab(inode);
+
-+ spin_lock(&sphl->spin);
-+ hlist_for_each_entry(icntnr, plink_hlist, plink) {
++ hlist_bl_lock(hbl);
++ hlist_bl_for_each_entry(icntnr, pos, hbl, plink) {
+ if (&icntnr->vfs_inode == inode) {
+ found = 1;
+ break;
+ }
+ if (!found) {
+ icntnr = container_of(inode, struct au_icntnr, vfs_inode);
-+ hlist_add_head_rcu(&icntnr->plink, plink_hlist);
++ hlist_bl_add_head(&icntnr->plink, hbl);
+ }
-+ spin_unlock(&sphl->spin);
++ hlist_bl_unlock(hbl);
+ if (!found) {
-+ cnt = au_sphl_count(sphl);
++ cnt = au_hbl_count(hbl);
+#define msg "unexpectedly unblanced or too many pseudo-links"
+ if (cnt > AUFS_PLINK_WARN)
+ AuWarn1(msg ", %d\n", cnt);
+ err = whplink(h_dentry, inode, bindex, au_sbr(sb, bindex));
+ if (unlikely(err)) {
+ pr_warn("err %d, damaged pseudo link.\n", err);
-+ au_sphl_del_rcu(&icntnr->plink, sphl);
++ au_hbl_del(&icntnr->plink, hbl);
+ iput(&icntnr->vfs_inode);
+ }
+ } else
+{
+ int i, warned;
+ struct au_sbinfo *sbinfo;
-+ struct hlist_head *plink_hlist;
-+ struct hlist_node *tmp;
++ struct hlist_bl_head *hbl;
++ struct hlist_bl_node *pos, *tmp;
+ struct au_icntnr *icntnr;
+
+ SiMustWriteLock(sb);
+ /* no spin_lock since sbinfo is write-locked */
+ warned = 0;
+ for (i = 0; i < AuPlink_NHASH; i++) {
-+ plink_hlist = &sbinfo->si_plink[i].head;
-+ if (!warned && verbose && !hlist_empty(plink_hlist)) {
++ hbl = sbinfo->si_plink + i;
++ if (!warned && verbose && !hlist_bl_empty(hbl)) {
+ pr_warn("pseudo-link is not flushed");
+ warned = 1;
+ }
-+ hlist_for_each_entry_safe(icntnr, tmp, plink_hlist, plink)
++ hlist_bl_for_each_entry_safe(icntnr, pos, tmp, hbl, plink)
+ iput(&icntnr->vfs_inode);
-+ INIT_HLIST_HEAD(plink_hlist);
++ INIT_HLIST_BL_HEAD(hbl);
+ }
+}
+
+void au_plink_half_refresh(struct super_block *sb, aufs_bindex_t br_id)
+{
+ struct au_sbinfo *sbinfo;
-+ struct hlist_head *plink_hlist;
-+ struct hlist_node *tmp;
++ struct hlist_bl_head *hbl;
++ struct hlist_bl_node *pos, *tmp;
+ struct au_icntnr *icntnr;
+ struct inode *inode;
+ int i, do_put;
+ AuDebugOn(!au_opt_test(au_mntflags(sb), PLINK));
+ AuDebugOn(au_plink_maint(sb, AuLock_NOPLM));
+
-+ /* no spin_lock since sbinfo is write-locked */
++ /* no bit_lock since sbinfo is write-locked */
+ for (i = 0; i < AuPlink_NHASH; i++) {
-+ plink_hlist = &sbinfo->si_plink[i].head;
-+ hlist_for_each_entry_safe(icntnr, tmp, plink_hlist, plink) {
++ hbl = sbinfo->si_plink + i;
++ hlist_bl_for_each_entry_safe(icntnr, pos, tmp, hbl, plink) {
+ inode = au_igrab(&icntnr->vfs_inode);
+ ii_write_lock_child(inode);
+ do_put = au_plink_do_half_refresh(inode, br_id);
+ if (do_put) {
-+ hlist_del(&icntnr->plink);
++ hlist_bl_del(&icntnr->plink);
+ iput(inode);
+ }
+ ii_write_unlock(inode);
+}
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 2017-07-29 12:14:25.906375514 +0200
-@@ -0,0 +1,52 @@
++++ linux/fs/aufs/poll.c 2018-08-12 23:43:05.460124736 +0200
+@@ -0,0 +1,51 @@
++// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 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 "aufs.h"
+
-+unsigned int aufs_poll(struct file *file, poll_table *wait)
++__poll_t aufs_poll(struct file *file, struct poll_table_struct *pt)
+{
-+ unsigned int mask;
-+ int err;
++ __poll_t mask;
+ struct file *h_file;
+ struct super_block *sb;
+
+ /* We should pretend an error happened. */
-+ mask = POLLERR /* | POLLIN | POLLOUT */;
++ mask = EPOLLERR /* | EPOLLIN | EPOLLOUT */;
+ sb = file->f_path.dentry->d_sb;
+ si_read_lock(sb, AuLock_FLUSH | AuLock_NOPLMW);
+
+ h_file = au_read_pre(file, /*keep_fi*/0, /*lsc*/0);
-+ err = PTR_ERR(h_file);
-+ if (IS_ERR(h_file))
++ if (IS_ERR(h_file)) {
++ AuDbg("h_file %ld\n", PTR_ERR(h_file));
+ goto out;
++ }
+
-+ /* it is not an error if h_file has no operation */
-+ mask = DEFAULT_POLLMASK;
-+ if (h_file->f_op->poll)
-+ mask = h_file->f_op->poll(h_file, wait);
++ mask = vfs_poll(h_file, pt);
+ fput(h_file); /* instead of au_read_post() */
+
+out:
+ si_read_unlock(sb);
-+ AuTraceErr((int)mask);
++ if (mask & EPOLLERR)
++ AuDbg("mask 0x%x\n", mask);
+ return mask;
+}
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 2017-07-29 12:14:25.906375514 +0200
-@@ -0,0 +1,102 @@
++++ linux/fs/aufs/posix_acl.c 2018-08-12 23:43:05.460124736 +0200
+@@ -0,0 +1,103 @@
++// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2014-2017 Junjiro R. Okajima
++ * Copyright (C) 2014-2018 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ sb = inode->i_sb;
+ si_read_lock(sb, AuLock_FLUSH);
+ ii_read_lock_child(inode);
-+ if (!(sb->s_flags & MS_POSIXACL))
++ if (!(sb->s_flags & SB_POSIXACL))
+ goto out;
+
+ bindex = au_ibtop(inode);
+}
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 2017-07-29 12:14:25.906375514 +0200
-@@ -0,0 +1,169 @@
++++ linux/fs/aufs/procfs.c 2018-08-12 23:43:05.460124736 +0200
+@@ -0,0 +1,171 @@
++// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2010-2017 Junjiro R. Okajima
++ * Copyright (C) 2010-2018 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 super_block *sb;
+ struct au_sbinfo *sbinfo;
++ struct hlist_bl_node *pos;
+
+ err = -EBUSY;
+ if (unlikely(file->private_data))
+
+ sb = NULL;
+ /* don't use au_sbilist_lock() here */
-+ spin_lock(&au_sbilist.spin);
-+ hlist_for_each_entry(sbinfo, &au_sbilist.head, si_list)
++ 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;
+ break;
+ }
-+ spin_unlock(&au_sbilist.spin);
++ hlist_bl_unlock(&au_sbilist);
+
+ err = -EINVAL;
+ if (unlikely(!sb))
+ if (unlikely(!au_procfs_dir))
+ goto out;
+
-+ entry = proc_create(AUFS_PLINK_MAINT_NAME, S_IFREG | S_IWUSR,
++ entry = proc_create(AUFS_PLINK_MAINT_NAME, S_IFREG | 0200,
+ au_procfs_dir, &au_procfs_plm_fop);
+ if (unlikely(!entry))
+ goto out_dir;
+}
diff -urN /usr/share/empty/fs/aufs/rdu.c linux/fs/aufs/rdu.c
--- /usr/share/empty/fs/aufs/rdu.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/rdu.c 2017-07-29 12:14:25.906375514 +0200
-@@ -0,0 +1,381 @@
++++ linux/fs/aufs/rdu.c 2018-08-12 23:43:05.463458173 +0200
+@@ -0,0 +1,382 @@
++// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+#endif
diff -urN /usr/share/empty/fs/aufs/rwsem.h linux/fs/aufs/rwsem.h
--- /usr/share/empty/fs/aufs/rwsem.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/rwsem.h 2017-07-29 12:14:25.906375514 +0200
-@@ -0,0 +1,198 @@
++++ linux/fs/aufs/rwsem.h 2018-08-12 23:43:05.463458173 +0200
+@@ -0,0 +1,73 @@
++/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 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 "debug.h"
+
-+struct au_rwsem {
-+ struct rw_semaphore rwsem;
-+#ifdef CONFIG_AUFS_DEBUG
-+ /* just for debugging, not almighty counter */
-+ atomic_t rcnt, wcnt;
-+#endif
-+};
-+
-+#ifdef CONFIG_LOCKDEP
-+#define au_lockdep_set_name(rw) \
-+ lockdep_set_class_and_name(&(rw)->rwsem, \
-+ /*original key*/(rw)->rwsem.dep_map.key, \
-+ /*name*/#rw)
-+#else
-+#define au_lockdep_set_name(rw) do {} while (0)
-+#endif
-+
-+#ifdef CONFIG_AUFS_DEBUG
-+#define AuDbgCntInit(rw) do { \
-+ atomic_set(&(rw)->rcnt, 0); \
-+ atomic_set(&(rw)->wcnt, 0); \
-+ smp_mb(); /* atomic set */ \
-+} while (0)
-+
-+#define AuDbgCnt(rw, cnt) atomic_read(&(rw)->cnt)
-+#define AuDbgCntInc(rw, cnt) atomic_inc(&(rw)->cnt)
-+#define AuDbgCntDec(rw, cnt) WARN_ON(atomic_dec_return(&(rw)->cnt) < 0)
-+#define AuDbgRcntInc(rw) AuDbgCntInc(rw, rcnt)
-+#define AuDbgRcntDec(rw) AuDbgCntDec(rw, rcnt)
-+#define AuDbgWcntInc(rw) AuDbgCntInc(rw, wcnt)
-+#define AuDbgWcntDec(rw) AuDbgCntDec(rw, wcnt)
-+#else
-+#define AuDbgCnt(rw, cnt) 0
-+#define AuDbgCntInit(rw) do {} while (0)
-+#define AuDbgRcntInc(rw) do {} while (0)
-+#define AuDbgRcntDec(rw) do {} while (0)
-+#define AuDbgWcntInc(rw) do {} while (0)
-+#define AuDbgWcntDec(rw) do {} while (0)
-+#endif /* CONFIG_AUFS_DEBUG */
++/* in the futre, the name 'au_rwsem' will be totally gone */
++#define au_rwsem rw_semaphore
+
+/* to debug easier, do not make them inlined functions */
-+#define AuRwMustNoWaiters(rw) AuDebugOn(rwsem_is_contended(&(rw)->rwsem))
++#define AuRwMustNoWaiters(rw) AuDebugOn(rwsem_is_contended(rw))
+/* rwsem_is_locked() is unusable */
-+#define AuRwMustReadLock(rw) AuDebugOn(AuDbgCnt(rw, rcnt) <= 0)
-+#define AuRwMustWriteLock(rw) AuDebugOn(AuDbgCnt(rw, wcnt) <= 0)
-+#define AuRwMustAnyLock(rw) AuDebugOn(AuDbgCnt(rw, rcnt) <= 0 \
-+ && AuDbgCnt(rw, wcnt) <= 0)
-+#define AuRwDestroy(rw) AuDebugOn(AuDbgCnt(rw, rcnt) \
-+ || AuDbgCnt(rw, wcnt))
-+
-+#define au_rw_init(rw) do { \
-+ AuDbgCntInit(rw); \
-+ init_rwsem(&(rw)->rwsem); \
-+ au_lockdep_set_name(rw); \
-+ } while (0)
++#define AuRwMustReadLock(rw) AuDebugOn(!lockdep_recursing(current) \
++ && debug_locks \
++ && !lockdep_is_held_type(rw, 1))
++#define AuRwMustWriteLock(rw) AuDebugOn(!lockdep_recursing(current) \
++ && debug_locks \
++ && !lockdep_is_held_type(rw, 0))
++#define AuRwMustAnyLock(rw) AuDebugOn(!lockdep_recursing(current) \
++ && debug_locks \
++ && !lockdep_is_held(rw))
++#define AuRwDestroy(rw) AuDebugOn(!lockdep_recursing(current) \
++ && debug_locks \
++ && lockdep_is_held(rw))
++
++#define au_rw_init(rw) init_rwsem(rw)
+
+#define au_rw_init_wlock(rw) do { \
+ au_rw_init(rw); \
-+ down_write(&(rw)->rwsem); \
-+ AuDbgWcntInc(rw); \
++ down_write(rw); \
+ } while (0)
+
-+#define au_rw_init_wlock_nested(rw, lsc) do { \
-+ au_rw_init(rw); \
-+ down_write_nested(&(rw)->rwsem, lsc); \
-+ AuDbgWcntInc(rw); \
++#define au_rw_init_wlock_nested(rw, lsc) do { \
++ au_rw_init(rw); \
++ down_write_nested(rw, lsc); \
+ } while (0)
+
-+static inline void au_rw_read_lock(struct au_rwsem *rw)
-+{
-+ down_read(&rw->rwsem);
-+ AuDbgRcntInc(rw);
-+}
-+
-+static inline void au_rw_read_lock_nested(struct au_rwsem *rw, unsigned int lsc)
-+{
-+ down_read_nested(&rw->rwsem, lsc);
-+ AuDbgRcntInc(rw);
-+}
-+
-+static inline void au_rw_read_unlock(struct au_rwsem *rw)
-+{
-+ AuRwMustReadLock(rw);
-+ AuDbgRcntDec(rw);
-+ up_read(&rw->rwsem);
-+}
-+
-+static inline void au_rw_dgrade_lock(struct au_rwsem *rw)
-+{
-+ AuRwMustWriteLock(rw);
-+ AuDbgRcntInc(rw);
-+ AuDbgWcntDec(rw);
-+ downgrade_write(&rw->rwsem);
-+}
-+
-+static inline void au_rw_write_lock(struct au_rwsem *rw)
-+{
-+ down_write(&rw->rwsem);
-+ AuDbgWcntInc(rw);
-+}
-+
-+static inline void au_rw_write_lock_nested(struct au_rwsem *rw,
-+ unsigned int lsc)
-+{
-+ down_write_nested(&rw->rwsem, lsc);
-+ AuDbgWcntInc(rw);
-+}
-+
-+static inline void au_rw_write_unlock(struct au_rwsem *rw)
-+{
-+ AuRwMustWriteLock(rw);
-+ AuDbgWcntDec(rw);
-+ up_write(&rw->rwsem);
-+}
-+
-+/* why is not _nested version defined */
-+static inline int au_rw_read_trylock(struct au_rwsem *rw)
-+{
-+ int ret;
-+
-+ ret = down_read_trylock(&rw->rwsem);
-+ if (ret)
-+ AuDbgRcntInc(rw);
-+ return ret;
-+}
-+
-+static inline int au_rw_write_trylock(struct au_rwsem *rw)
-+{
-+ int ret;
-+
-+ ret = down_write_trylock(&rw->rwsem);
-+ if (ret)
-+ AuDbgWcntInc(rw);
-+ return ret;
-+}
-+
-+#undef AuDbgCntDec
-+#undef AuDbgRcntInc
-+#undef AuDbgRcntDec
-+#undef AuDbgWcntDec
-+
-+#define AuSimpleLockRwsemFuncs(prefix, param, rwsem) \
-+static inline void prefix##_read_lock(param) \
-+{ au_rw_read_lock(rwsem); } \
-+static inline void prefix##_write_lock(param) \
-+{ au_rw_write_lock(rwsem); } \
-+static inline int prefix##_read_trylock(param) \
-+{ return au_rw_read_trylock(rwsem); } \
-+static inline int prefix##_write_trylock(param) \
-+{ return au_rw_write_trylock(rwsem); }
-+/* why is not _nested version defined */
-+/* static inline void prefix##_read_trylock_nested(param, lsc)
-+{ au_rw_read_trylock_nested(rwsem, lsc)); }
-+static inline void prefix##_write_trylock_nestd(param, lsc)
-+{ au_rw_write_trylock_nested(rwsem, lsc); } */
-+
-+#define AuSimpleUnlockRwsemFuncs(prefix, param, rwsem) \
-+static inline void prefix##_read_unlock(param) \
-+{ au_rw_read_unlock(rwsem); } \
-+static inline void prefix##_write_unlock(param) \
-+{ au_rw_write_unlock(rwsem); } \
-+static inline void prefix##_downgrade_lock(param) \
-+{ au_rw_dgrade_lock(rwsem); }
-+
-+#define AuSimpleRwsemFuncs(prefix, param, rwsem) \
-+ AuSimpleLockRwsemFuncs(prefix, param, rwsem) \
-+ AuSimpleUnlockRwsemFuncs(prefix, param, rwsem)
++#define au_rw_read_lock(rw) down_read(rw)
++#define au_rw_read_lock_nested(rw, lsc) down_read_nested(rw, lsc)
++#define au_rw_read_unlock(rw) up_read(rw)
++#define au_rw_dgrade_lock(rw) downgrade_write(rw)
++#define au_rw_write_lock(rw) down_write(rw)
++#define au_rw_write_lock_nested(rw, lsc) down_write_nested(rw, lsc)
++#define au_rw_write_unlock(rw) up_write(rw)
++/* why is not _nested version defined? */
++#define au_rw_read_trylock(rw) down_read_trylock(rw)
++#define au_rw_write_trylock(rw) down_write_trylock(rw)
+
+#endif /* __KERNEL__ */
+#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 2017-07-29 12:14:25.906375514 +0200
-@@ -0,0 +1,304 @@
++++ linux/fs/aufs/sbinfo.c 2018-08-12 23:43:05.463458173 +0200
+@@ -0,0 +1,312 @@
++// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 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
+
+ sbinfo = container_of(kobj, struct au_sbinfo, si_kobj);
+ for (i = 0; i < AuPlink_NHASH; i++)
-+ AuDebugOn(!hlist_empty(&sbinfo->si_plink[i].head));
++ AuDebugOn(!hlist_bl_empty(sbinfo->si_plink + i));
+ AuDebugOn(atomic_read(&sbinfo->si_nowait.nw_len));
+
+ AuDebugOn(percpu_counter_sum(&sbinfo->si_ninodes));
+ AuDebugOn(percpu_counter_sum(&sbinfo->si_nfiles));
+ percpu_counter_destroy(&sbinfo->si_nfiles);
+
++ dbgaufs_si_fin(sbinfo);
+ au_rw_write_lock(&sbinfo->si_rwsem);
+ au_br_free(sbinfo);
+ au_rw_write_unlock(&sbinfo->si_rwsem);
+ goto out_sbinfo;
+
+ err = sysaufs_si_init(sbinfo);
++ if (!err) {
++ dbgaufs_si_null(sbinfo);
++ err = dbgaufs_si_init(sbinfo);
++ if (unlikely(err))
++ kobject_put(&sbinfo->si_kobj);
++ }
+ if (unlikely(err))
+ goto out_br;
+
+ sbinfo->si_xino_brid = -1;
+ /* leave si_xib_last_pindex and si_xib_next_bit */
+
-+ au_sphl_init(&sbinfo->si_aopen);
++ INIT_HLIST_BL_HEAD(&sbinfo->si_aopen);
+
+ sbinfo->si_rdcache = msecs_to_jiffies(AUFS_RDCACHE_DEF * MSEC_PER_SEC);
+ sbinfo->si_rdblk = AUFS_RDBLK_DEF;
+ sbinfo->si_dirwh = AUFS_DIRWH_DEF;
+
+ for (i = 0; i < AuPlink_NHASH; i++)
-+ au_sphl_init(sbinfo->si_plink + i);
++ INIT_HLIST_BL_HEAD(sbinfo->si_plink + i);
+ init_waitqueue_head(&sbinfo->si_plink_wq);
+ spin_lock_init(&sbinfo->si_plink_maint_lock);
+
-+ au_sphl_init(&sbinfo->si_files);
++ INIT_HLIST_BL_HEAD(&sbinfo->si_files);
+
+ /* with getattr by default */
+ sbinfo->si_iop_array = aufs_iop;
+ au_update_digen(sb->s_root);
+ inode = d_inode(sb->s_root);
+ au_update_iigen(inode, /*half*/0);
-+ inode->i_version++;
++ inode_inc_iversion(inode);
+ return gen;
+}
+
+ di_write_unlock2(d1, d2);
+ si_read_unlock(d1->d_sb);
+}
-diff -urN /usr/share/empty/fs/aufs/spl.h linux/fs/aufs/spl.h
---- /usr/share/empty/fs/aufs/spl.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/spl.h 2017-07-29 12:14:25.906375514 +0200
-@@ -0,0 +1,113 @@
-+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
-+ *
-+ * This program, aufs is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2 of the License, or
-+ * (at your option) any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
-+ */
-+
-+/*
-+ * simple list protected by a spinlock
-+ */
-+
-+#ifndef __AUFS_SPL_H__
-+#define __AUFS_SPL_H__
-+
-+#ifdef __KERNEL__
-+
-+#if 0
-+struct au_splhead {
-+ spinlock_t spin;
-+ struct list_head head;
-+};
-+
-+static inline void au_spl_init(struct au_splhead *spl)
-+{
-+ spin_lock_init(&spl->spin);
-+ INIT_LIST_HEAD(&spl->head);
-+}
-+
-+static inline void au_spl_add(struct list_head *list, struct au_splhead *spl)
-+{
-+ spin_lock(&spl->spin);
-+ list_add(list, &spl->head);
-+ spin_unlock(&spl->spin);
-+}
-+
-+static inline void au_spl_del(struct list_head *list, struct au_splhead *spl)
-+{
-+ spin_lock(&spl->spin);
-+ list_del(list);
-+ spin_unlock(&spl->spin);
-+}
-+
-+static inline void au_spl_del_rcu(struct list_head *list,
-+ struct au_splhead *spl)
-+{
-+ spin_lock(&spl->spin);
-+ list_del_rcu(list);
-+ spin_unlock(&spl->spin);
-+}
-+#endif
-+
-+/* ---------------------------------------------------------------------- */
-+
-+struct au_sphlhead {
-+ spinlock_t spin;
-+ struct hlist_head head;
-+};
-+
-+static inline void au_sphl_init(struct au_sphlhead *sphl)
-+{
-+ spin_lock_init(&sphl->spin);
-+ INIT_HLIST_HEAD(&sphl->head);
-+}
-+
-+static inline void au_sphl_add(struct hlist_node *hlist,
-+ struct au_sphlhead *sphl)
-+{
-+ spin_lock(&sphl->spin);
-+ hlist_add_head(hlist, &sphl->head);
-+ spin_unlock(&sphl->spin);
-+}
-+
-+static inline void au_sphl_del(struct hlist_node *hlist,
-+ struct au_sphlhead *sphl)
-+{
-+ spin_lock(&sphl->spin);
-+ hlist_del(hlist);
-+ spin_unlock(&sphl->spin);
-+}
-+
-+static inline void au_sphl_del_rcu(struct hlist_node *hlist,
-+ struct au_sphlhead *sphl)
-+{
-+ spin_lock(&sphl->spin);
-+ hlist_del_rcu(hlist);
-+ spin_unlock(&sphl->spin);
-+}
-+
-+static inline unsigned long au_sphl_count(struct au_sphlhead *sphl)
-+{
-+ unsigned long cnt;
-+ struct hlist_node *pos;
-+
-+ cnt = 0;
-+ spin_lock(&sphl->spin);
-+ hlist_for_each(pos, &sphl->head)
-+ cnt++;
-+ spin_unlock(&sphl->spin);
-+ return cnt;
-+}
-+
-+#endif /* __KERNEL__ */
-+#endif /* __AUFS_SPL_H__ */
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 2017-07-29 12:14:25.906375514 +0200
-@@ -0,0 +1,1044 @@
++++ linux/fs/aufs/super.c 2018-08-12 23:43:05.463458173 +0200
+@@ -0,0 +1,1043 @@
++// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 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
+ c = au_cache_alloc_icntnr();
+ if (c) {
+ au_icntnr_init(c);
-+ c->vfs_inode.i_version = 1; /* sigen(sb); */
++ inode_set_iversion(&c->vfs_inode, 1); /* sigen(sb); */
+ c->iinfo.ii_hinode = NULL;
+ return &c->vfs_inode;
+ }
+ if (!err)
+ err = au_iinfo_init(inode);
+ if (!err)
-+ inode->i_version++;
++ inode_inc_iversion(inode);
+ else {
+ iget_failed(inode);
+ inode = ERR_PTR(err);
+} while (0)
+
+ sb = dentry->d_sb;
-+ if (sb->s_flags & MS_POSIXACL)
++ if (sb->s_flags & SB_POSIXACL)
+ seq_puts(m, ",acl");
++#if 0
++ if (sb->s_flags & SB_I_VERSION)
++ seq_puts(m, ",i_version");
++#endif
+
+ /* lock free root dinfo */
+ si_noflush_read_lock(sb);
+
+ au_fhsm_show(m, sbinfo);
+
++ AuBool(DIRREN, dirren);
+ AuBool(SUM, sum);
+ /* AuBool(SUM_W, wsum); */
+ AuBool(WARN_PERM, warn_perm);
+ struct au_sbinfo *sbinfo;
+
+ sbinfo = au_sbi(sb);
-+ if (!sbinfo)
-+ return;
-+
-+ dbgaufs_si_fin(sbinfo);
-+ kobject_put(&sbinfo->si_kobj);
++ if (sbinfo)
++ kobject_put(&sbinfo->si_kobj);
+}
+
+/* ---------------------------------------------------------------------- */
+ AuDebugOn(sbi->si_iop_array == aufs_iop);
+ sbi->si_iop_array = aufs_iop;
+ }
-+ pr_info("reset to %pf and %pf\n",
++ pr_info("reset to %ps and %ps\n",
+ sb->s_d_op, sbi->si_iop_array);
+ }
+
+ sbinfo = au_sbi(sb);
+
+ /* all timestamps always follow the ones on the branch */
-+ sb->s_flags |= MS_NOATIME | MS_NODIRATIME;
++ sb->s_flags |= SB_NOATIME | SB_NODIRATIME;
++ sb->s_flags |= SB_I_VERSION; /* do we really need this? */
+ sb->s_op = &aufs_sop;
+ sb->s_d_op = &aufs_dop;
+ sb->s_magic = AUFS_SUPER_MAGIC;
+ au_opts_free(&opts);
+ if (!err && au_ftest_si(sbinfo, NO_DREVAL)) {
+ sb->s_d_op = &aufs_dop_noreval;
-+ pr_info("%pf\n", sb->s_d_op);
++ pr_info("%ps\n", sb->s_d_op);
+ au_refresh_dop(root, /*force_reval*/0);
+ sbinfo->si_iop_array = aufs_iop_nogetattr;
+ au_refresh_iop(inode, /*force_getattr*/0);
+ dput(root);
+ sb->s_root = NULL;
+out_info:
-+ dbgaufs_si_fin(sbinfo);
+ kobject_put(&sbinfo->si_kobj);
+ sb->s_fs_info = NULL;
+out_opts:
+ void *raw_data)
+{
+ struct dentry *root;
-+ struct super_block *sb;
+
+ /* all timestamps always follow the ones on the branch */
+ /* mnt->mnt_flags |= MNT_NOATIME | MNT_NODIRATIME; */
+ if (IS_ERR(root))
+ goto out;
+
-+ sb = root->d_sb;
-+ si_write_lock(sb, !AuLock_FLUSH);
-+ sysaufs_brs_add(sb, 0);
-+ si_write_unlock(sb);
-+ au_sbilist_add(sb);
++ au_sbilist_add(root->d_sb);
+
+out:
+ return root;
+ if (au_opt_test(sbinfo->si_mntflags, PLINK))
+ au_plink_put(sb, /*verbose*/1);
+ au_xino_clr(sb);
++ au_dr_opt_flush(sb);
+ sbinfo->si_sb = NULL;
+ aufs_write_unlock(sb->s_root);
+ au_nwt_flush(&sbinfo->si_nowait);
+};
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 2017-07-29 12:14:25.906375514 +0200
-@@ -0,0 +1,617 @@
++++ linux/fs/aufs/super.h 2018-08-12 23:43:05.463458173 +0200
+@@ -0,0 +1,627 @@
++/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+
+#include <linux/fs.h>
+#include <linux/kobject.h>
++#include "hbl.h"
+#include "rwsem.h"
-+#include "spl.h"
+#include "wkq.h"
+
+/* policies to select one among multiple writable branches */
+#endif
+
+ /* dirty trick to suppoer atomic_open */
-+ struct au_sphlhead si_aopen;
++ struct hlist_bl_head si_aopen;
+
+ /* vdir parameters */
+ unsigned long si_rdcache; /* max cache time in jiffies */
+ unsigned int si_dirwh;
+
+ /* pseudo_link list */
-+ struct au_sphlhead si_plink[AuPlink_NHASH];
++ struct hlist_bl_head si_plink[AuPlink_NHASH];
+ wait_queue_head_t si_plink_wq;
+ spinlock_t si_plink_maint_lock;
+ pid_t si_plink_maint_pid;
+
+ /* file list */
-+ struct au_sphlhead si_files;
++ struct hlist_bl_head si_files;
+
+ /* with/without getattr, brother of sb->s_d_op */
+ struct inode_operations *si_iop_array;
+#endif
+
+#ifdef CONFIG_AUFS_SBILIST
-+ struct hlist_node si_list;
++ struct hlist_bl_node si_list;
+#endif
+
+ /* dirty, necessary for unmounting, sysfs and sysrq */
+/*
+ * set true when refresh_dirs() failed at remount time.
+ * then try refreshing dirs at access time again.
-+ * if it is false, refreshing dirs at access time is unnecesary
++ * if it is false, refreshing dirs at access time is unnecessary
+ */
+#define AuSi_FAILED_REFRESH_DIR 1
+#define AuSi_FHSM (1 << 1) /* fhsm is active now */
+void au_export_init(struct super_block *sb);
+void au_xigen_inc(struct inode *inode);
+int au_xigen_new(struct inode *inode);
-+int au_xigen_set(struct super_block *sb, struct file *base);
++int au_xigen_set(struct super_block *sb, struct path *path);
+void au_xigen_clr(struct super_block *sb);
+
+static inline int au_busy_or_stale(void)
+AuStubVoid(au_export_init, struct super_block *sb)
+AuStubVoid(au_xigen_inc, struct inode *inode)
+AuStubInt0(au_xigen_new, struct inode *inode)
-+AuStubInt0(au_xigen_set, struct super_block *sb, struct file *base)
++AuStubInt0(au_xigen_set, struct super_block *sb, struct path *path)
+AuStubVoid(au_xigen_clr, struct super_block *sb)
+AuStub(int, au_busy_or_stale, return -EBUSY, void)
+#endif /* CONFIG_AUFS_EXPORT */
+
+#ifdef CONFIG_AUFS_SBILIST
+/* module.c */
-+extern struct au_sphlhead au_sbilist;
++extern struct hlist_bl_head au_sbilist;
+
+static inline void au_sbilist_init(void)
+{
-+ au_sphl_init(&au_sbilist);
++ INIT_HLIST_BL_HEAD(&au_sbilist);
+}
+
+static inline void au_sbilist_add(struct super_block *sb)
+{
-+ au_sphl_add(&au_sbi(sb)->si_list, &au_sbilist);
++ au_hbl_add(&au_sbi(sb)->si_list, &au_sbilist);
+}
+
+static inline void au_sbilist_del(struct super_block *sb)
+{
-+ au_sphl_del(&au_sbi(sb)->si_list, &au_sbilist);
++ au_hbl_del(&au_sbi(sb)->si_list, &au_sbilist);
+}
+
+#ifdef CONFIG_AUFS_MAGIC_SYSRQ
+static inline void au_sbilist_lock(void)
+{
-+ spin_lock(&au_sbilist.spin);
++ hlist_bl_lock(&au_sbilist);
+}
+
+static inline void au_sbilist_unlock(void)
+{
-+ spin_unlock(&au_sbilist.spin);
++ hlist_bl_unlock(&au_sbilist);
+}
+#define AuGFP_SBILIST GFP_ATOMIC
+#else
+/* ---------------------------------------------------------------------- */
+
+/* lock superblock. mainly for entry point functions */
-+/*
-+ * __si_read_lock, __si_write_lock,
-+ * __si_read_unlock, __si_write_unlock, __si_downgrade_lock
-+ */
-+AuSimpleRwsemFuncs(__si, struct super_block *sb, &au_sbi(sb)->si_rwsem);
++#define __si_read_lock(sb) au_rw_read_lock(&au_sbi(sb)->si_rwsem)
++#define __si_write_lock(sb) au_rw_write_lock(&au_sbi(sb)->si_rwsem)
++#define __si_read_trylock(sb) au_rw_read_trylock(&au_sbi(sb)->si_rwsem)
++#define __si_write_trylock(sb) au_rw_write_trylock(&au_sbi(sb)->si_rwsem)
++/*
++#define __si_read_trylock_nested(sb) \
++ au_rw_read_trylock_nested(&au_sbi(sb)->si_rwsem)
++#define __si_write_trylock_nested(sb) \
++ au_rw_write_trylock_nested(&au_sbi(sb)->si_rwsem)
++*/
++
++#define __si_read_unlock(sb) au_rw_read_unlock(&au_sbi(sb)->si_rwsem)
++#define __si_write_unlock(sb) au_rw_write_unlock(&au_sbi(sb)->si_rwsem)
++#define __si_downgrade_lock(sb) au_rw_dgrade_lock(&au_sbi(sb)->si_rwsem)
+
+#define SiMustNoWaiters(sb) AuRwMustNoWaiters(&au_sbi(sb)->si_rwsem)
+#define SiMustAnyLock(sb) AuRwMustAnyLock(&au_sbi(sb)->si_rwsem)
+#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 2017-07-29 12:14:25.906375514 +0200
-@@ -0,0 +1,104 @@
++++ linux/fs/aufs/sysaufs.c 2018-08-12 23:43:05.463458173 +0200
+@@ -0,0 +1,93 @@
++// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 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
+ (&sbinfo->si_kobj, &au_sbi_ktype, /*&sysaufs_kset->kobj*/NULL,
+ SysaufsSiNamePrefix "%lx", sysaufs_si_id(sbinfo));
+
-+ dbgaufs_si_null(sbinfo);
-+ if (!err) {
-+ err = dbgaufs_si_init(sbinfo);
-+ if (unlikely(err))
-+ kobject_put(&sbinfo->si_kobj);
-+ }
+ return err;
+}
+
+void sysaufs_fin(void)
+{
-+ dbgaufs_fin();
+ sysfs_remove_group(&sysaufs_kset->kobj, sysaufs_attr_group);
+ kset_unregister(sysaufs_kset);
+}
+ if (IS_ERR(sysaufs_kset))
+ goto out;
+ err = sysfs_create_group(&sysaufs_kset->kobj, sysaufs_attr_group);
-+ if (unlikely(err)) {
++ if (unlikely(err))
+ kset_unregister(sysaufs_kset);
-+ goto out;
-+ }
+
-+ err = dbgaufs_init();
-+ if (unlikely(err))
-+ sysaufs_fin();
+out:
+ return err;
+}
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 2017-07-29 12:14:25.906375514 +0200
-@@ -0,0 +1,101 @@
++++ linux/fs/aufs/sysaufs.h 2018-08-12 23:43:05.463458173 +0200
+@@ -0,0 +1,102 @@
++/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 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 2017-07-29 12:14:25.906375514 +0200
-@@ -0,0 +1,376 @@
++++ linux/fs/aufs/sysfs.c 2018-08-12 23:43:05.463458173 +0200
+@@ -0,0 +1,373 @@
++// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 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
+ attr = &br_sysfs->attr;
+ sysfs_attr_init(attr);
+ attr->name = br_sysfs->name;
-+ attr->mode = S_IRUGO;
++ attr->mode = 0444;
+ br_sysfs++;
+ }
+}
+ int i;
+ aufs_bindex_t bbot;
+
-+ dbgaufs_brs_del(sb, bindex);
-+
+ if (!sysaufs_brs)
+ return;
+
+ struct au_branch *br;
+ struct au_brsysfs *br_sysfs;
+
-+ dbgaufs_brs_add(sb, bindex);
-+
+ if (!sysaufs_brs)
+ return;
+
+}
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 2017-07-29 12:14:25.906375514 +0200
-@@ -0,0 +1,157 @@
++++ linux/fs/aufs/sysrq.c 2018-08-12 23:43:05.463458173 +0200
+@@ -0,0 +1,160 @@
++// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 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
+ char *plevel;
+ struct au_sbinfo *sbinfo;
+ struct file *file;
-+ struct au_sphlhead *files;
++ struct hlist_bl_head *files;
++ struct hlist_bl_node *pos;
+ struct au_finfo *finfo;
+
+ plevel = au_plevel;
+#endif
+ pr("files\n");
+ files = &au_sbi(sb)->si_files;
-+ spin_lock(&files->spin);
-+ hlist_for_each_entry(finfo, &files->head, fi_hlist) {
++ hlist_bl_lock(files);
++ hlist_bl_for_each_entry(finfo, pos, files, fi_hlist) {
+ umode_t mode;
+
+ file = finfo->fi_file;
+ if (!special_file(mode))
+ au_dpri_file(file);
+ }
-+ spin_unlock(&files->spin);
++ hlist_bl_unlock(files);
+ pr("done\n");
+
+#undef pr
+
+/* module parameter */
+static char *aufs_sysrq_key = "a";
-+module_param_named(sysrq, aufs_sysrq_key, charp, S_IRUGO);
++module_param_named(sysrq, aufs_sysrq_key, charp, 0444);
+MODULE_PARM_DESC(sysrq, "MagicSysRq key for " AUFS_NAME);
+
+static void au_sysrq(int key __maybe_unused)
+{
+ struct au_sbinfo *sbinfo;
++ struct hlist_bl_node *pos;
+
+ lockdep_off();
+ au_sbilist_lock();
-+ hlist_for_each_entry(sbinfo, &au_sbilist.head, si_list)
++ hlist_bl_for_each_entry(sbinfo, pos, &au_sbilist, si_list)
+ sysrq_sb(sbinfo->si_sb);
+ au_sbilist_unlock();
+ lockdep_on();
+}
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 2017-07-29 12:14:25.906375514 +0200
-@@ -0,0 +1,892 @@
++++ linux/fs/aufs/vdir.c 2018-08-12 23:43:05.463458173 +0200
+@@ -0,0 +1,894 @@
++// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 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 = 0;
+ allocated = vdir;
+ } else if (may_read
-+ && (inode->i_version != vdir->vd_version
++ && (!inode_eq_iversion(inode, vdir->vd_version)
+ || time_after(jiffies, vdir->vd_jiffy + expire))) {
+ do_read = 1;
+ err = reinit_vdir(vdir);
+ err = au_do_read_vdir(&arg);
+ if (!err) {
+ /* file->f_pos = 0; */ /* todo: ctx->pos? */
-+ vdir->vd_version = inode->i_version;
++ vdir->vd_version = inode_query_iversion(inode);
+ vdir->vd_last.ul = 0;
+ vdir->vd_last.p.deblk = vdir->vd_deblk[0];
+ if (allocated)
+ inode = file_inode(file);
+ err = copy_vdir(vdir_cache, au_ivdir(inode));
+ if (!err) {
-+ file->f_version = inode->i_version;
++ file->f_version = inode_query_iversion(inode);
+ if (allocated)
+ au_set_fvdir_cache(file, allocated);
+ } else if (allocated)
+
+out:
+ /* smp_mb(); */
-+ AuTraceErr(!valid);
++ if (!valid)
++ AuDbg("valid %d\n", !valid);
+ return valid;
+}
+
+}
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 2017-07-29 12:14:25.906375514 +0200
-@@ -0,0 +1,900 @@
++++ linux/fs/aufs/vfsub.c 2018-08-12 23:43:05.463458173 +0200
+@@ -0,0 +1,895 @@
++// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 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
+ * sub-routines for VFS
+ */
+
++#include <linux/mnt_namespace.h>
+#include <linux/namei.h>
+#include <linux/nsproxy.h>
+#include <linux/security.h>
+#include <linux/splice.h>
-+#ifdef CONFIG_AUFS_BR_FUSE
-+#include "../fs/mount.h"
-+#endif
+#include "aufs.h"
+
+#ifdef CONFIG_AUFS_BR_FUSE
+int vfsub_test_mntns(struct vfsmount *mnt, struct super_block *h_sb)
+{
-+ struct nsproxy *ns;
-+
+ if (!au_test_fuse(h_sb) || !au_userns)
+ return 0;
+
-+ ns = current->nsproxy;
-+ /* no {get,put}_nsproxy(ns) */
-+ return real_mount(mnt)->mnt_ns == ns->mnt_ns ? 0 : -EACCES;
++ return is_current_mnt_ns(mnt) ? 0 : -EACCES;
+}
+#endif
+
+{
+ int err;
+
-+ AuDbg("%pD, ctx{%pf, %llu}\n", file, ctx->actor, ctx->pos);
++ AuDbg("%pD, ctx{%ps, %llu}\n", file, ctx->actor, ctx->pos);
+
+ lockdep_off();
+ err = iterate_dir(file, ctx);
+}
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 2017-07-29 12:14:25.906375514 +0200
-@@ -0,0 +1,353 @@
++++ linux/fs/aufs/vfsub.h 2018-08-12 23:43:05.463458173 +0200
+@@ -0,0 +1,355 @@
++/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 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>
+
+static inline int vfsub_native_ro(struct inode *inode)
+{
-+ return (inode->i_sb->s_flags & MS_RDONLY)
++ return sb_rdonly(inode->i_sb)
+ || IS_RDONLY(inode)
+ /* || IS_APPEND(inode) */
+ || IS_IMMUTABLE(inode);
+}
+#endif
+
-+static inline int vfsub_update_time(struct inode *h_inode, struct timespec *ts,
-+ int flags)
++static inline int vfsub_update_time(struct inode *h_inode,
++ struct timespec64 *ts, int flags)
+{
+ return update_time(h_inode, ts, flags);
+ /* no vfsub_update_h_iattr() since we don't have struct path */
+#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 2017-07-29 12:14:25.906375514 +0200
++++ linux/fs/aufs/wbr_policy.c 2018-08-12 23:43:05.463458173 +0200
@@ -0,0 +1,830 @@
++// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ goto out;
+ h_path.dentry = au_h_dptr(dentry, bdst);
+ h_path.mnt = au_sbr_mnt(dentry->d_sb, bdst);
-+ err = vfsub_sio_mkdir(au_h_iptr(dir, bdst), &h_path,
-+ S_IRWXU | S_IRUGO | S_IXUGO);
++ err = vfsub_sio_mkdir(au_h_iptr(dir, bdst), &h_path, 0755);
+ if (unlikely(err))
+ goto out_put;
+ au_fset_cpdown(*flags, MADE_DIR);
+};
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 2017-07-29 12:14:25.906375514 +0200
-@@ -0,0 +1,1061 @@
++++ linux/fs/aufs/whout.c 2018-08-12 23:43:05.463458173 +0200
+@@ -0,0 +1,1062 @@
++// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 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 "aufs.h"
+
-+#define WH_MASK S_IRUGO
++#define WH_MASK 0444
+
+/*
+ * If a directory contains this file, then it is opaque. We start with the
+
+ err = -EEXIST;
+ if (d_is_negative(path->dentry)) {
-+ int mode = S_IRWXU;
++ int mode = 0700;
+
+ if (au_test_nfs(path->dentry->d_sb))
-+ mode |= S_IXUGO;
++ mode |= 0111;
+ err = vfsub_mkdir(h_dir, path, mode);
+ } else if (d_is_dir(path->dentry))
+ err = 0;
+}
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 2017-07-29 12:14:25.906375514 +0200
-@@ -0,0 +1,84 @@
++++ linux/fs/aufs/whout.h 2018-08-12 23:43:05.463458173 +0200
+@@ -0,0 +1,86 @@
++/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 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_wh_name_alloc(struct qstr *wh, const struct qstr *name);
+int au_wh_test(struct dentry *h_parent, struct qstr *wh_name, int try_sio);
+int au_diropq_test(struct dentry *h_dentry);
++struct au_branch;
+struct dentry *au_whtmp_lkup(struct dentry *h_parent, struct au_branch *br,
+ struct qstr *prefix);
+int au_whtmp_ren(struct dentry *h_dentry, struct au_branch *br);
+#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 2017-07-29 12:14:25.906375514 +0200
-@@ -0,0 +1,213 @@
++++ linux/fs/aufs/wkq.c 2018-08-12 23:43:05.463458173 +0200
+@@ -0,0 +1,391 @@
++// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ au_wkq_func_t func;
+ void *args;
+
++#ifdef CONFIG_LOCKDEP
++ int dont_check;
++ struct held_lock **hlock;
++#endif
++
+ struct completion *comp;
+};
+
+/* ---------------------------------------------------------------------- */
++/*
++ * Aufs passes some operations to the workqueue such as the internal copyup.
++ * This scheme looks rather unnatural for LOCKDEP debugging feature, since the
++ * job run by workqueue depends upon the locks acquired in the other task.
++ * Delegating a small operation to the workqueue, aufs passes its lockdep
++ * information too. And the job in the workqueue restores the info in order to
++ * pretend as if it acquired those locks. This is just to make LOCKDEP work
++ * correctly and expectedly.
++ */
++
++#ifndef CONFIG_LOCKDEP
++AuStubInt0(au_wkq_lockdep_alloc, struct au_wkinfo *wkinfo);
++AuStubVoid(au_wkq_lockdep_free, struct au_wkinfo *wkinfo);
++AuStubVoid(au_wkq_lockdep_pre, struct au_wkinfo *wkinfo);
++AuStubVoid(au_wkq_lockdep_post, struct au_wkinfo *wkinfo);
++AuStubVoid(au_wkq_lockdep_init, struct au_wkinfo *wkinfo);
++#else
++static void au_wkq_lockdep_init(struct au_wkinfo *wkinfo)
++{
++ wkinfo->hlock = NULL;
++ wkinfo->dont_check = 0;
++}
++
++/*
++ * 1: matched
++ * 0: unmatched
++ */
++static int au_wkq_lockdep_test(struct lock_class_key *key, const char *name)
++{
++ static DEFINE_SPINLOCK(spin);
++ static struct {
++ char *name;
++ struct lock_class_key *key;
++ } a[] = {
++ { .name = "&sbinfo->si_rwsem" },
++ { .name = "&finfo->fi_rwsem" },
++ { .name = "&dinfo->di_rwsem" },
++ { .name = "&iinfo->ii_rwsem" }
++ };
++ static int set;
++ int i;
++
++ /* lockless read from 'set.' see below */
++ if (set == ARRAY_SIZE(a)) {
++ for (i = 0; i < ARRAY_SIZE(a); i++)
++ if (a[i].key == key)
++ goto match;
++ goto unmatch;
++ }
++
++ spin_lock(&spin);
++ if (set)
++ for (i = 0; i < ARRAY_SIZE(a); i++)
++ if (a[i].key == key) {
++ spin_unlock(&spin);
++ goto match;
++ }
++ for (i = 0; i < ARRAY_SIZE(a); i++) {
++ if (a[i].key) {
++ if (unlikely(a[i].key == key)) { /* rare but possible */
++ spin_unlock(&spin);
++ goto match;
++ } else
++ continue;
++ }
++ if (strstr(a[i].name, name)) {
++ /*
++ * the order of these three lines is important for the
++ * lockless read above.
++ */
++ a[i].key = key;
++ spin_unlock(&spin);
++ set++;
++ /* AuDbg("%d, %s\n", set, name); */
++ goto match;
++ }
++ }
++ spin_unlock(&spin);
++ goto unmatch;
++
++match:
++ return 1;
++unmatch:
++ return 0;
++}
++
++static int au_wkq_lockdep_alloc(struct au_wkinfo *wkinfo)
++{
++ int err, n;
++ struct task_struct *curr;
++ struct held_lock **hl, *held_locks, *p;
++
++ err = 0;
++ curr = current;
++ wkinfo->dont_check = lockdep_recursing(curr);
++ if (wkinfo->dont_check)
++ goto out;
++ n = curr->lockdep_depth;
++ if (!n)
++ goto out;
++
++ err = -ENOMEM;
++ wkinfo->hlock = kmalloc_array(n + 1, sizeof(*wkinfo->hlock), GFP_NOFS);
++ if (unlikely(!wkinfo->hlock))
++ goto out;
++
++ err = 0;
++#if 0
++ if (0 && au_debug_test()) /* left for debugging */
++ lockdep_print_held_locks(curr);
++#endif
++ held_locks = curr->held_locks;
++ hl = wkinfo->hlock;
++ while (n--) {
++ p = held_locks++;
++ if (au_wkq_lockdep_test(p->instance->key, p->instance->name))
++ *hl++ = p;
++ }
++ *hl = NULL;
++
++out:
++ return err;
++}
++
++static void au_wkq_lockdep_free(struct au_wkinfo *wkinfo)
++{
++ kfree(wkinfo->hlock);
++}
++
++static void au_wkq_lockdep_pre(struct au_wkinfo *wkinfo)
++{
++ struct held_lock *p, **hl = wkinfo->hlock;
++ int subclass;
++
++ if (wkinfo->dont_check)
++ lockdep_off();
++ if (!hl)
++ return;
++ while ((p = *hl++)) { /* assignment */
++ subclass = lockdep_hlock_class(p)->subclass;
++ /* AuDbg("%s, %d\n", p->instance->name, subclass); */
++ if (p->read)
++ rwsem_acquire_read(p->instance, subclass, 0,
++ /*p->acquire_ip*/_RET_IP_);
++ else
++ rwsem_acquire(p->instance, subclass, 0,
++ /*p->acquire_ip*/_RET_IP_);
++ }
++}
++
++static void au_wkq_lockdep_post(struct au_wkinfo *wkinfo)
++{
++ struct held_lock *p, **hl = wkinfo->hlock;
++
++ if (wkinfo->dont_check)
++ lockdep_on();
++ if (!hl)
++ return;
++ while ((p = *hl++)) /* assignment */
++ rwsem_release(p->instance, 0, /*p->acquire_ip*/_RET_IP_);
++}
++#endif
+
+static void wkq_func(struct work_struct *wk)
+{
+ AuDebugOn(!uid_eq(current_fsuid(), GLOBAL_ROOT_UID));
+ AuDebugOn(rlimit(RLIMIT_FSIZE) != RLIM_INFINITY);
+
++ au_wkq_lockdep_pre(wkinfo);
+ wkinfo->func(wkinfo->args);
++ au_wkq_lockdep_post(wkinfo);
+ if (au_ftest_wkq(wkinfo->flags, WAIT))
+ complete(wkinfo->comp);
+ else {
+ };
+
+ err = au_wkq_comp_alloc(&wkinfo, &comp);
++ if (unlikely(err))
++ goto out;
++ err = au_wkq_lockdep_alloc(&wkinfo);
++ if (unlikely(err))
++ goto out_comp;
+ if (!err) {
+ au_wkq_run(&wkinfo);
+ /* no timeout, no interrupt */
+ wait_for_completion(wkinfo.comp);
-+ au_wkq_comp_free(comp);
-+ destroy_work_on_stack(&wkinfo.wk);
+ }
++ au_wkq_lockdep_free(&wkinfo);
+
++out_comp:
++ au_wkq_comp_free(comp);
++out:
++ destroy_work_on_stack(&wkinfo.wk);
+ return err;
-+
+}
+
+/*
+ wkinfo->func = func;
+ wkinfo->args = args;
+ wkinfo->comp = NULL;
++ au_wkq_lockdep_init(wkinfo);
+ kobject_get(wkinfo->kobj);
+ __module_get(THIS_MODULE); /* todo: ?? */
+
+}
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 2017-07-29 12:14:25.906375514 +0200
-@@ -0,0 +1,93 @@
++++ linux/fs/aufs/wkq.h 2018-08-12 23:43:05.463458173 +0200
+@@ -0,0 +1,94 @@
++/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 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/percpu_counter.h>
++#include <linux/wait.h>
+
+struct super_block;
+
+#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 2017-07-29 12:14:25.906375514 +0200
-@@ -0,0 +1,357 @@
++++ linux/fs/aufs/xattr.c 2018-08-12 23:43:05.466791610 +0200
+@@ -0,0 +1,356 @@
++// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2014-2017 Junjiro R. Okajima
++ * Copyright (C) 2014-2018 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
+ h_isrc = d_inode(h_src);
+ h_idst = d_inode(h_dst);
+ inode_unlock(h_idst);
-+ inode_lock_nested(h_isrc, AuLsc_I_CHILD);
++ inode_lock_shared_nested(h_isrc, AuLsc_I_CHILD);
+ inode_lock_nested(h_idst, AuLsc_I_CHILD2);
+ unlocked = 0;
+
+ goto out;
+ err = vfs_listxattr(h_src, p, ssz);
+ }
-+ inode_unlock(h_isrc);
++ inode_unlock_shared(h_isrc);
+ unlocked = 1;
+ AuDbg("err %d, ssz %zd\n", err, ssz);
+ if (unlikely(err < 0))
+ AuTraceErr(err);
+ }
+
-+ if (value)
-+ kfree(value);
++ kfree(value);
+
+out_free:
-+ if (o)
-+ kfree(o);
++ kfree(o);
+out:
+ if (!unlocked)
-+ inode_unlock(h_isrc);
++ inode_unlock_shared(h_isrc);
+ AuTraceErr(err);
+ return err;
+}
+}
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 2017-07-29 12:14:25.906375514 +0200
-@@ -0,0 +1,1415 @@
++++ linux/fs/aufs/xino.c 2018-08-12 23:43:05.466791610 +0200
+@@ -0,0 +1,1593 @@
++// SPDX-License-Identifier: GPL-2.0
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 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
+
+/*
+ * external inode number translation table and bitmap
++ *
++ * things to consider
++ * - the lifetime
++ * + au_xino object
++ * + XINO files (xino, xib, xigen)
++ * + dynamic debugfs entries (xiN)
++ * + static debugfs entries (xib, xigen)
++ * + static sysfs entry (xi_path)
++ * - several entry points to handle them.
++ * + mount(2) without xino option (default)
++ * + mount(2) with xino option
++ * + mount(2) with noxino option
++ * + umount(2)
++ * + remount with add/del branches
++ * + remount with xino/noxino options
+ */
+
+#include <linux/seq_file.h>
+#include <linux/statfs.h>
+#include "aufs.h"
+
-+/* todo: unnecessary to support mmap_sem since kernel-space? */
-+ssize_t xino_fread(vfs_readf_t func, struct file *file, void *kbuf, size_t size,
-+ loff_t *pos)
++static aufs_bindex_t sbr_find_shared(struct super_block *sb, aufs_bindex_t btop,
++ aufs_bindex_t bbot,
++ struct super_block *h_sb)
+{
-+ ssize_t err;
-+ mm_segment_t oldfs;
-+ union {
-+ void *k;
-+ char __user *u;
-+ } buf;
++ /* todo: try binary-search if the branches are many */
++ for (; btop <= bbot; btop++)
++ if (h_sb == au_sbr_sb(sb, btop))
++ return btop;
++ return -1;
++}
+
-+ buf.k = kbuf;
-+ oldfs = get_fs();
-+ set_fs(KERNEL_DS);
-+ do {
-+ /* todo: signal_pending? */
-+ err = func(file, buf.u, size, pos);
-+ } while (err == -EAGAIN || err == -EINTR);
-+ set_fs(oldfs);
++/*
++ * find another branch who is on the same filesystem of the specified
++ * branch{@btgt}. search until @bbot.
++ */
++static aufs_bindex_t is_sb_shared(struct super_block *sb, aufs_bindex_t btgt,
++ aufs_bindex_t bbot)
++{
++ aufs_bindex_t bindex;
++ struct super_block *tgt_sb;
+
-+#if 0 /* reserved for future use */
-+ if (err > 0)
-+ fsnotify_access(file->f_path.dentry);
-+#endif
++ tgt_sb = au_sbr_sb(sb, btgt);
++ bindex = sbr_find_shared(sb, /*btop*/0, btgt - 1, tgt_sb);
++ if (bindex < 0)
++ bindex = sbr_find_shared(sb, btgt + 1, bbot, tgt_sb);
+
-+ return err;
++ return bindex;
+}
+
+/* ---------------------------------------------------------------------- */
+
-+static ssize_t xino_fwrite_wkq(vfs_writef_t func, struct file *file, void *buf,
-+ size_t size, loff_t *pos);
++/*
++ * stop unnecessary notify events at creating xino files
++ */
++struct au_xino_lock_dir {
++ struct au_hinode *hdir;
++ struct dentry *parent;
++ struct inode *dir;
++};
+
-+static ssize_t do_xino_fwrite(vfs_writef_t func, struct file *file, void *kbuf,
-+ size_t size, loff_t *pos)
++static struct dentry *au_dget_parent_lock(struct dentry *dentry,
++ unsigned int lsc)
+{
-+ ssize_t err;
-+ mm_segment_t oldfs;
-+ union {
-+ void *k;
-+ const char __user *u;
-+ } buf;
-+ int i;
-+ const int prevent_endless = 10;
++ struct dentry *parent;
++ struct inode *dir;
+
-+ i = 0;
-+ buf.k = kbuf;
-+ oldfs = get_fs();
-+ set_fs(KERNEL_DS);
-+ do {
-+ err = func(file, buf.u, size, pos);
-+ if (err == -EINTR
-+ && !au_wkq_test()
-+ && fatal_signal_pending(current)) {
-+ set_fs(oldfs);
-+ err = xino_fwrite_wkq(func, file, kbuf, size, pos);
-+ BUG_ON(err == -EINTR);
-+ oldfs = get_fs();
-+ set_fs(KERNEL_DS);
-+ }
-+ } while (i++ < prevent_endless
-+ && (err == -EAGAIN || err == -EINTR));
-+ set_fs(oldfs);
++ parent = dget_parent(dentry);
++ dir = d_inode(parent);
++ inode_lock_nested(dir, lsc);
++#if 0 /* it should not happen */
++ spin_lock(&dentry->d_lock);
++ if (unlikely(dentry->d_parent != parent)) {
++ spin_unlock(&dentry->d_lock);
++ inode_unlock(dir);
++ dput(parent);
++ parent = NULL;
++ goto out;
++ }
++ spin_unlock(&dentry->d_lock);
+
-+#if 0 /* reserved for future use */
-+ if (err > 0)
-+ fsnotify_modify(file->f_path.dentry);
++out:
+#endif
-+
-+ return err;
++ return parent;
+}
+
-+struct do_xino_fwrite_args {
-+ ssize_t *errp;
-+ vfs_writef_t func;
-+ struct file *file;
-+ void *buf;
-+ size_t size;
-+ loff_t *pos;
-+};
++static void au_xino_lock_dir(struct super_block *sb, struct path *xipath,
++ struct au_xino_lock_dir *ldir)
++{
++ aufs_bindex_t brid, bindex;
+
-+static void call_do_xino_fwrite(void *args)
++ ldir->hdir = NULL;
++ bindex = -1;
++ brid = au_xino_brid(sb);
++ if (brid >= 0)
++ bindex = au_br_index(sb, brid);
++ if (bindex >= 0) {
++ /* rw branch root */
++ ldir->hdir = au_hi(d_inode(sb->s_root), bindex);
++ au_hn_inode_lock_nested(ldir->hdir, AuLsc_I_PARENT);
++ } else {
++ /* other */
++ ldir->parent = au_dget_parent_lock(xipath->dentry,
++ AuLsc_I_PARENT);
++ ldir->dir = d_inode(ldir->parent);
++ }
++}
++
++static void au_xino_unlock_dir(struct au_xino_lock_dir *ldir)
+{
-+ struct do_xino_fwrite_args *a = args;
-+ *a->errp = do_xino_fwrite(a->func, a->file, a->buf, a->size, a->pos);
++ if (ldir->hdir)
++ au_hn_inode_unlock(ldir->hdir);
++ else {
++ inode_unlock(ldir->dir);
++ dput(ldir->parent);
++ }
+}
+
-+static ssize_t xino_fwrite_wkq(vfs_writef_t func, struct file *file, void *buf,
-+ size_t size, loff_t *pos)
++/* ---------------------------------------------------------------------- */
++
++/*
++ * create and set a new xino file
++ */
++struct file *au_xino_create(struct super_block *sb, char *fpath, int silent)
+{
-+ ssize_t err;
-+ int wkq_err;
-+ struct do_xino_fwrite_args args = {
-+ .errp = &err,
-+ .func = func,
-+ .file = file,
-+ .buf = buf,
-+ .size = size,
-+ .pos = pos
-+ };
++ struct file *file;
++ struct dentry *h_parent, *d;
++ struct inode *h_dir, *inode;
++ int err;
+
+ /*
-+ * it breaks RLIMIT_FSIZE and normal user's limit,
-+ * users should care about quota and real 'filesystem full.'
++ * 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.
+ */
-+ wkq_err = au_wkq_wait(call_do_xino_fwrite, &args);
-+ if (unlikely(wkq_err))
-+ err = wkq_err;
-+
-+ return err;
-+}
++ file = vfsub_filp_open(fpath, O_RDWR | O_CREAT | O_EXCL | O_LARGEFILE
++ /* | __FMODE_NONOTIFY */,
++ 0666);
++ if (IS_ERR(file)) {
++ if (!silent)
++ pr_err("open %s(%ld)\n", fpath, PTR_ERR(file));
++ return file;
++ }
+
-+ssize_t xino_fwrite(vfs_writef_t func, struct file *file, void *buf,
-+ size_t size, loff_t *pos)
-+{
-+ ssize_t err;
++ /* keep file count */
++ err = 0;
++ d = file->f_path.dentry;
++ h_parent = au_dget_parent_lock(d, AuLsc_I_PARENT);
++ /* mnt_want_write() is unnecessary here */
++ h_dir = d_inode(h_parent);
++ inode = file_inode(file);
++ /* no delegation since it is just created */
++ if (inode->i_nlink)
++ err = vfsub_unlink(h_dir, &file->f_path, /*delegated*/NULL,
++ /*force*/0);
++ inode_unlock(h_dir);
++ dput(h_parent);
++ if (unlikely(err)) {
++ if (!silent)
++ pr_err("unlink %s(%d)\n", fpath, err);
++ goto out;
++ }
+
-+ if (rlimit(RLIMIT_FSIZE) == RLIM_INFINITY) {
-+ lockdep_off();
-+ err = do_xino_fwrite(func, file, buf, size, pos);
-+ lockdep_on();
-+ } else
-+ err = xino_fwrite_wkq(func, file, buf, size, pos);
++ err = -EINVAL;
++ if (unlikely(sb == d->d_sb)) {
++ if (!silent)
++ pr_err("%s must be outside\n", fpath);
++ goto out;
++ }
++ if (unlikely(au_test_fs_bad_xino(d->d_sb))) {
++ if (!silent)
++ pr_err("xino doesn't support %s(%s)\n",
++ fpath, au_sbtype(d->d_sb));
++ goto out;
++ }
++ return file; /* success */
+
-+ return err;
++out:
++ fput(file);
++ file = ERR_PTR(err);
++ return file;
+}
+
-+/* ---------------------------------------------------------------------- */
-+
+/*
-+ * create a new xinofile at the same place/path as @base_file.
++ * create a new xinofile at the same place/path as @base.
+ */
-+struct file *au_xino_create2(struct file *base_file, struct file *copy_src)
++struct file *au_xino_create2(struct super_block *sb, struct path *base,
++ struct file *copy_src)
+{
+ struct file *file;
-+ struct dentry *base, *parent;
++ struct dentry *dentry, *parent;
+ struct inode *dir, *delegated;
+ struct qstr *name;
+ struct path path;
-+ int err;
++ int err, do_unlock;
++ struct au_xino_lock_dir ldir;
+
-+ base = base_file->f_path.dentry;
-+ parent = base->d_parent; /* dir inode is locked */
++ do_unlock = 1;
++ au_xino_lock_dir(sb, base, &ldir);
++ dentry = base->dentry;
++ parent = dentry->d_parent; /* dir inode is locked */
+ dir = d_inode(parent);
+ IMustLock(dir);
+
-+ file = ERR_PTR(-EINVAL);
-+ name = &base->d_name;
++ name = &dentry->d_name;
+ path.dentry = vfsub_lookup_one_len(name->name, parent, name->len);
+ if (IS_ERR(path.dentry)) {
+ file = (void *)path.dentry;
-+ pr_err("%pd lookup err %ld\n",
-+ base, PTR_ERR(path.dentry));
++ pr_err("%pd lookup err %ld\n", dentry, PTR_ERR(path.dentry));
+ goto out;
+ }
+
+ /* no need to mnt_want_write() since we call dentry_open() later */
-+ err = vfs_create(dir, path.dentry, S_IRUGO | S_IWUGO, NULL);
++ err = vfs_create(dir, path.dentry, 0666, NULL);
+ if (unlikely(err)) {
+ file = ERR_PTR(err);
-+ pr_err("%pd create err %d\n", base, err);
++ pr_err("%pd create err %d\n", dentry, err);
+ goto out_dput;
+ }
+
-+ path.mnt = base_file->f_path.mnt;
++ path.mnt = base->mnt;
+ file = vfsub_dentry_open(&path,
+ O_RDWR | O_CREAT | O_EXCL | O_LARGEFILE
+ /* | __FMODE_NONOTIFY */);
+ if (IS_ERR(file)) {
-+ pr_err("%pd open err %ld\n", base, PTR_ERR(file));
++ pr_err("%pd open err %ld\n", dentry, PTR_ERR(file));
+ goto out_dput;
+ }
+
+ delegated = NULL;
+ err = vfsub_unlink(dir, &file->f_path, &delegated, /*force*/0);
++ au_xino_unlock_dir(&ldir);
++ do_unlock = 0;
+ if (unlikely(err == -EWOULDBLOCK)) {
+ pr_warn("cannot retry for NFSv4 delegation"
+ " for an internal unlink\n");
+ iput(delegated);
+ }
+ if (unlikely(err)) {
-+ pr_err("%pd unlink err %d\n", base, err);
++ pr_err("%pd unlink err %d\n", dentry, err);
+ goto out_fput;
+ }
+
+ /* no one can touch copy_src xino */
+ err = au_copy_file(file, copy_src, vfsub_f_size_read(copy_src));
+ if (unlikely(err)) {
-+ pr_err("%pd copy err %d\n", base, err);
++ pr_err("%pd copy err %d\n", dentry, err);
+ goto out_fput;
+ }
+ }
+out_dput:
+ dput(path.dentry);
+out:
++ if (do_unlock)
++ au_xino_unlock_dir(&ldir);
+ return file;
+}
+
-+struct au_xino_lock_dir {
-+ struct au_hinode *hdir;
-+ struct dentry *parent;
-+ struct inode *dir;
-+};
-+
-+static void au_xino_lock_dir(struct super_block *sb, struct file *xino,
-+ struct au_xino_lock_dir *ldir)
-+{
-+ aufs_bindex_t brid, bindex;
-+
-+ ldir->hdir = NULL;
-+ bindex = -1;
-+ brid = au_xino_brid(sb);
-+ if (brid >= 0)
-+ bindex = au_br_index(sb, brid);
-+ if (bindex >= 0) {
-+ ldir->hdir = au_hi(d_inode(sb->s_root), bindex);
-+ au_hn_inode_lock_nested(ldir->hdir, AuLsc_I_PARENT);
-+ } else {
-+ ldir->parent = dget_parent(xino->f_path.dentry);
-+ ldir->dir = d_inode(ldir->parent);
-+ inode_lock_nested(ldir->dir, AuLsc_I_PARENT);
-+ }
-+}
-+
-+static void au_xino_unlock_dir(struct au_xino_lock_dir *ldir)
-+{
-+ if (ldir->hdir)
-+ au_hn_inode_unlock(ldir->hdir);
-+ else {
-+ inode_unlock(ldir->dir);
-+ dput(ldir->parent);
-+ }
-+}
-+
+/* ---------------------------------------------------------------------- */
+
-+/* trucate xino files asynchronously */
-+
++/*
++ * truncate xino files
++ */
+int au_xino_trunc(struct super_block *sb, aufs_bindex_t bindex)
+{
+ int err;
+ unsigned long jiffy;
+ blkcnt_t blocks;
-+ aufs_bindex_t bi, bbot;
++ aufs_bindex_t bbot;
+ struct kstatfs *st;
+ struct au_branch *br;
+ struct file *new_xino, *file;
-+ struct super_block *h_sb;
-+ struct au_xino_lock_dir ldir;
++ struct path *path;
+
+ err = -ENOMEM;
+ st = kmalloc(sizeof(*st), GFP_NOFS);
+ if (unlikely(bindex < 0 || bbot < bindex))
+ goto out_st;
+ br = au_sbr(sb, bindex);
-+ file = br->br_xino.xi_file;
++ file = au_xino_file(br);
+ if (!file)
+ goto out_st;
+
-+ err = vfs_statfs(&file->f_path, st);
++ path = &file->f_path;
++ err = vfs_statfs(path, st);
+ if (unlikely(err))
+ AuErr1("statfs err %d, ignored\n", err);
+ jiffy = jiffies;
+ pr_info("begin truncating xino(b%d), ib%llu, %llu/%llu free blks\n",
+ bindex, (u64)blocks, st->f_bfree, st->f_blocks);
+
-+ au_xino_lock_dir(sb, file, &ldir);
-+ /* mnt_want_write() is unnecessary here */
-+ new_xino = au_xino_create2(file, file);
-+ au_xino_unlock_dir(&ldir);
++ new_xino = au_xino_create2(sb, path, file);
+ err = PTR_ERR(new_xino);
+ if (IS_ERR(new_xino)) {
+ pr_err("err %d, ignored\n", err);
+ goto out_st;
+ }
+ err = 0;
-+ fput(file);
-+ br->br_xino.xi_file = new_xino;
-+
-+ h_sb = au_br_sb(br);
-+ for (bi = 0; bi <= bbot; bi++) {
-+ if (unlikely(bi == bindex))
-+ continue;
-+ br = au_sbr(sb, bi);
-+ if (au_br_sb(br) != h_sb)
-+ continue;
-+
-+ fput(br->br_xino.xi_file);
-+ br->br_xino.xi_file = new_xino;
-+ get_file(new_xino);
-+ }
++ au_xino_file_set(br, new_xino);
+
+ err = vfs_statfs(&new_xino->f_path, st);
+ if (!err) {
+ au_sbi(sb)->si_xino_jiffy = jiffy;
+ } else
+ AuErr1("statfs err %d, ignored\n", err);
++ fput(new_xino);
+
+out_st:
+ kfree(st);
+ ii_read_unlock(dir);
+ if (unlikely(err))
+ pr_warn("err b%d, (%d)\n", bindex, err);
-+ atomic_dec(&br->br_xino_running);
++ atomic_dec(&br->br_xino->xi_truncating);
+ au_br_put(br);
+ si_write_unlock(sb);
+ au_nwt_done(&au_sbi(sb)->si_nowait);
+ int err;
+ struct kstatfs st;
+ struct au_sbinfo *sbinfo;
++ struct file *file;
+
+ /* todo: si_xino_expire and the ratio should be customizable */
+ sbinfo = au_sbi(sb);
+ return 0;
+
+ /* truncation border */
-+ err = vfs_statfs(&br->br_xino.xi_file->f_path, &st);
++ file = au_xino_file(br);
++ AuDebugOn(!file);
++ err = vfs_statfs(&file->f_path, &st);
+ if (unlikely(err)) {
+ AuErr1("statfs err %d, ignored\n", err);
+ return 0;
+ if (!xino_trunc_test(sb, br))
+ return;
+
-+ if (atomic_inc_return(&br->br_xino_running) > 1)
++ if (atomic_inc_return(&br->br_xino->xi_truncating) > 1)
+ goto out;
+
+ /* lock and kfree() will be called in trunc_xino() */
+ goto out;
+ }
+
-+ au_br_get(br);
-+ args->sb = sb;
-+ args->br = br;
-+ wkq_err = au_wkq_nowait(xino_do_trunc, args, sb, /*flags*/0);
-+ if (!wkq_err)
-+ return; /* success */
++ au_br_get(br);
++ args->sb = sb;
++ args->br = br;
++ wkq_err = au_wkq_nowait(xino_do_trunc, args, sb, /*flags*/0);
++ if (!wkq_err)
++ return; /* success */
++
++ pr_err("wkq %d\n", wkq_err);
++ au_br_put(br);
++ kfree(args);
++
++out:
++ atomic_dec(&br->br_xino->xi_truncating);
++}
++
++/* ---------------------------------------------------------------------- */
++
++/*
++ * read @ino from xinofile for the specified branch{@sb, @bindex}
++ * at the position of @h_ino.
++ */
++int au_xino_read(struct super_block *sb, aufs_bindex_t bindex, ino_t h_ino,
++ ino_t *ino)
++{
++ int err;
++ ssize_t sz;
++ loff_t pos;
++ struct au_branch *br;
++ struct file *file;
++ struct au_sbinfo *sbinfo;
++
++ *ino = 0;
++ if (!au_opt_test(au_mntflags(sb), XINO))
++ return 0; /* no xino */
++
++ err = 0;
++ sbinfo = au_sbi(sb);
++ pos = h_ino;
++ if (unlikely(au_loff_max / sizeof(*ino) - 1 < pos)) {
++ AuIOErr1("too large hi%lu\n", (unsigned long)h_ino);
++ return -EFBIG;
++ }
++ pos *= sizeof(*ino);
++
++ br = au_sbr(sb, bindex);
++ file = au_xino_file(br);
++ if (vfsub_f_size_read(file) < pos + sizeof(*ino))
++ return 0; /* no ino */
+
-+ pr_err("wkq %d\n", wkq_err);
-+ au_br_put(br);
-+ kfree(args);
++ sz = xino_fread(sbinfo->si_xread, file, ino, sizeof(*ino), &pos);
++ if (sz == sizeof(*ino))
++ return 0; /* success */
+
-+out:
-+ atomic_dec(&br->br_xino_running);
-+}
++ err = sz;
++ if (unlikely(sz >= 0)) {
++ err = -EIO;
++ AuIOErr("xino read error (%zd)\n", sz);
++ }
+
-+/* ---------------------------------------------------------------------- */
++ return err;
++}
+
+static int au_xino_do_write(vfs_writef_t write, struct file *file,
+ ino_t h_ino, ino_t ino)
+ return 0;
+
+ br = au_sbr(sb, bindex);
-+ err = au_xino_do_write(au_sbi(sb)->si_xwrite, br->br_xino.xi_file,
-+ h_ino, ino);
++ err = au_xino_do_write(au_sbi(sb)->si_xwrite, au_xino_file(br), h_ino,
++ ino);
+ if (!err) {
+ if (au_opt_test(mnt_flags, TRUNC_XINO)
+ && au_test_fs_trunc_xino(au_br_sb(br)))
+ return -EIO;
+}
+
-+/* ---------------------------------------------------------------------- */
++static ssize_t xino_fread_wkq(vfs_readf_t func, struct file *file, void *buf,
++ size_t size, loff_t *pos);
++
++/* todo: unnecessary to support mmap_sem since kernel-space? */
++ssize_t xino_fread(vfs_readf_t func, struct file *file, void *kbuf, size_t size,
++ loff_t *pos)
++{
++ ssize_t err;
++ mm_segment_t oldfs;
++ union {
++ void *k;
++ char __user *u;
++ } buf;
++ int i;
++ const int prevent_endless = 10;
++
++ i = 0;
++ buf.k = kbuf;
++ oldfs = get_fs();
++ set_fs(KERNEL_DS);
++ do {
++ err = func(file, buf.u, size, pos);
++ if (err == -EINTR
++ && !au_wkq_test()
++ && fatal_signal_pending(current)) {
++ set_fs(oldfs);
++ err = xino_fread_wkq(func, file, kbuf, size, pos);
++ BUG_ON(err == -EINTR);
++ oldfs = get_fs();
++ set_fs(KERNEL_DS);
++ }
++ } while (i++ < prevent_endless
++ && (err == -EAGAIN || err == -EINTR));
++ set_fs(oldfs);
++
++#if 0 /* reserved for future use */
++ if (err > 0)
++ fsnotify_access(file->f_path.dentry);
++#endif
++
++ return err;
++}
++
++struct xino_fread_args {
++ ssize_t *errp;
++ vfs_readf_t func;
++ struct file *file;
++ void *buf;
++ size_t size;
++ loff_t *pos;
++};
++
++static void call_xino_fread(void *args)
++{
++ struct xino_fread_args *a = args;
++ *a->errp = xino_fread(a->func, a->file, a->buf, a->size, a->pos);
++}
++
++static ssize_t xino_fread_wkq(vfs_readf_t func, struct file *file, void *buf,
++ size_t size, loff_t *pos)
++{
++ ssize_t err;
++ int wkq_err;
++ struct xino_fread_args args = {
++ .errp = &err,
++ .func = func,
++ .file = file,
++ .buf = buf,
++ .size = size,
++ .pos = pos
++ };
++
++ wkq_err = au_wkq_wait(call_xino_fread, &args);
++ if (unlikely(wkq_err))
++ err = wkq_err;
++
++ return err;
++}
++
++static ssize_t xino_fwrite_wkq(vfs_writef_t func, struct file *file, void *buf,
++ size_t size, loff_t *pos);
++
++static ssize_t do_xino_fwrite(vfs_writef_t func, struct file *file, void *kbuf,
++ size_t size, loff_t *pos)
++{
++ ssize_t err;
++ mm_segment_t oldfs;
++ union {
++ void *k;
++ const char __user *u;
++ } buf;
++ int i;
++ const int prevent_endless = 10;
++
++ i = 0;
++ buf.k = kbuf;
++ oldfs = get_fs();
++ set_fs(KERNEL_DS);
++ do {
++ err = func(file, buf.u, size, pos);
++ if (err == -EINTR
++ && !au_wkq_test()
++ && fatal_signal_pending(current)) {
++ set_fs(oldfs);
++ err = xino_fwrite_wkq(func, file, kbuf, size, pos);
++ BUG_ON(err == -EINTR);
++ oldfs = get_fs();
++ set_fs(KERNEL_DS);
++ }
++ } while (i++ < prevent_endless
++ && (err == -EAGAIN || err == -EINTR));
++ set_fs(oldfs);
++
++#if 0 /* reserved for future use */
++ if (err > 0)
++ fsnotify_modify(file->f_path.dentry);
++#endif
++
++ return err;
++}
++
++struct do_xino_fwrite_args {
++ ssize_t *errp;
++ vfs_writef_t func;
++ struct file *file;
++ void *buf;
++ size_t size;
++ loff_t *pos;
++};
++
++static void call_do_xino_fwrite(void *args)
++{
++ struct do_xino_fwrite_args *a = args;
++ *a->errp = do_xino_fwrite(a->func, a->file, a->buf, a->size, a->pos);
++}
++
++static ssize_t xino_fwrite_wkq(vfs_writef_t func, struct file *file, void *buf,
++ size_t size, loff_t *pos)
++{
++ ssize_t err;
++ int wkq_err;
++ struct do_xino_fwrite_args args = {
++ .errp = &err,
++ .func = func,
++ .file = file,
++ .buf = buf,
++ .size = size,
++ .pos = pos
++ };
++
++ /*
++ * it breaks RLIMIT_FSIZE and normal user's limit,
++ * users should care about quota and real 'filesystem full.'
++ */
++ wkq_err = au_wkq_wait(call_do_xino_fwrite, &args);
++ if (unlikely(wkq_err))
++ err = wkq_err;
++
++ return err;
++}
++
++ssize_t xino_fwrite(vfs_writef_t func, struct file *file, void *buf,
++ size_t size, loff_t *pos)
++{
++ ssize_t err;
++
++ if (rlimit(RLIMIT_FSIZE) == RLIM_INFINITY) {
++ lockdep_off();
++ err = do_xino_fwrite(func, file, buf, size, pos);
++ lockdep_on();
++ } else {
++ lockdep_off();
++ err = xino_fwrite_wkq(func, file, buf, size, pos);
++ lockdep_on();
++ }
++
++ return err;
++}
+
-+/* aufs inode number bitmap */
++/* ---------------------------------------------------------------------- */
+
++/*
++ * inode number bitmap
++ */
+static const int page_bits = (int)PAGE_SIZE * BITS_PER_BYTE;
+static ino_t xib_calc_ino(unsigned long pindex, int bit)
+{
+ return err;
+}
+
-+/* ---------------------------------------------------------------------- */
-+
+static void au_xib_clear_bit(struct inode *inode)
+{
+ int err, bit;
+ mutex_unlock(&sbinfo->si_xib_mtx);
+}
+
-+/* for s_op->delete_inode() */
-+void au_xino_delete_inode(struct inode *inode, const int unlinked)
-+{
-+ int err;
-+ unsigned int mnt_flags;
-+ aufs_bindex_t bindex, bbot, bi;
-+ unsigned char try_trunc;
-+ struct au_iinfo *iinfo;
-+ struct super_block *sb;
-+ struct au_hinode *hi;
-+ struct inode *h_inode;
-+ struct au_branch *br;
-+ vfs_writef_t xwrite;
-+
-+ AuDebugOn(au_is_bad_inode(inode));
-+
-+ sb = inode->i_sb;
-+ mnt_flags = au_mntflags(sb);
-+ if (!au_opt_test(mnt_flags, XINO)
-+ || inode->i_ino == AUFS_ROOT_INO)
-+ return;
-+
-+ if (unlinked) {
-+ au_xigen_inc(inode);
-+ au_xib_clear_bit(inode);
-+ }
-+
-+ iinfo = au_ii(inode);
-+ bindex = iinfo->ii_btop;
-+ if (bindex < 0)
-+ return;
-+
-+ xwrite = au_sbi(sb)->si_xwrite;
-+ try_trunc = !!au_opt_test(mnt_flags, TRUNC_XINO);
-+ hi = au_hinode(iinfo, bindex);
-+ bbot = iinfo->ii_bbot;
-+ for (; bindex <= bbot; bindex++, hi++) {
-+ h_inode = hi->hi_inode;
-+ if (!h_inode
-+ || (!unlinked && h_inode->i_nlink))
-+ continue;
-+
-+ /* inode may not be revalidated */
-+ bi = au_br_index(sb, hi->hi_id);
-+ if (bi < 0)
-+ continue;
-+
-+ br = au_sbr(sb, bi);
-+ err = au_xino_do_write(xwrite, br->br_xino.xi_file,
-+ h_inode->i_ino, /*ino*/0);
-+ if (!err && try_trunc
-+ && au_test_fs_trunc_xino(au_br_sb(br)))
-+ xino_try_trunc(sb, br);
-+ }
-+}
-+
-+/* get an unused inode number from bitmap */
-+ino_t au_xino_new_ino(struct super_block *sb)
-+{
-+ ino_t ino;
-+ unsigned long *p, pindex, ul, pend;
-+ struct au_sbinfo *sbinfo;
-+ struct file *file;
-+ int free_bit, err;
-+
-+ if (!au_opt_test(au_mntflags(sb), XINO))
-+ return iunique(sb, AUFS_FIRST_INO);
-+
-+ sbinfo = au_sbi(sb);
-+ mutex_lock(&sbinfo->si_xib_mtx);
-+ p = sbinfo->si_xib_buf;
-+ free_bit = sbinfo->si_xib_next_bit;
-+ if (free_bit < page_bits && !test_bit(free_bit, p))
-+ goto out; /* success */
-+ free_bit = find_first_zero_bit(p, page_bits);
-+ if (free_bit < page_bits)
-+ goto out; /* success */
-+
-+ pindex = sbinfo->si_xib_last_pindex;
-+ for (ul = pindex - 1; ul < ULONG_MAX; ul--) {
-+ err = xib_pindex(sb, ul);
-+ if (unlikely(err))
-+ goto out_err;
-+ free_bit = find_first_zero_bit(p, page_bits);
-+ if (free_bit < page_bits)
-+ goto out; /* success */
-+ }
-+
-+ file = sbinfo->si_xib;
-+ pend = vfsub_f_size_read(file) / PAGE_SIZE;
-+ for (ul = pindex + 1; ul <= pend; ul++) {
-+ err = xib_pindex(sb, ul);
-+ if (unlikely(err))
-+ goto out_err;
-+ free_bit = find_first_zero_bit(p, page_bits);
-+ if (free_bit < page_bits)
-+ goto out; /* success */
-+ }
-+ BUG();
-+
-+out:
-+ set_bit(free_bit, p);
-+ sbinfo->si_xib_next_bit = free_bit + 1;
-+ pindex = sbinfo->si_xib_last_pindex;
-+ mutex_unlock(&sbinfo->si_xib_mtx);
-+ ino = xib_calc_ino(pindex, free_bit);
-+ AuDbg("i%lu\n", (unsigned long)ino);
-+ return ino;
-+out_err:
-+ mutex_unlock(&sbinfo->si_xib_mtx);
-+ AuDbg("i0\n");
-+ return 0;
-+}
-+
-+/*
-+ * read @ino from xinofile for the specified branch{@sb, @bindex}
-+ * at the position of @h_ino.
-+ * if @ino does not exist and @do_new is true, get new one.
-+ */
-+int au_xino_read(struct super_block *sb, aufs_bindex_t bindex, ino_t h_ino,
-+ ino_t *ino)
-+{
-+ int err;
-+ ssize_t sz;
-+ loff_t pos;
-+ struct file *file;
-+ struct au_sbinfo *sbinfo;
-+
-+ *ino = 0;
-+ if (!au_opt_test(au_mntflags(sb), XINO))
-+ return 0; /* no xino */
-+
-+ err = 0;
-+ sbinfo = au_sbi(sb);
-+ pos = h_ino;
-+ if (unlikely(au_loff_max / sizeof(*ino) - 1 < pos)) {
-+ AuIOErr1("too large hi%lu\n", (unsigned long)h_ino);
-+ return -EFBIG;
-+ }
-+ pos *= sizeof(*ino);
-+
-+ file = au_sbr(sb, bindex)->br_xino.xi_file;
-+ if (vfsub_f_size_read(file) < pos + sizeof(*ino))
-+ return 0; /* no ino */
-+
-+ sz = xino_fread(sbinfo->si_xread, file, ino, sizeof(*ino), &pos);
-+ if (sz == sizeof(*ino))
-+ return 0; /* success */
-+
-+ err = sz;
-+ if (unlikely(sz >= 0)) {
-+ err = -EIO;
-+ AuIOErr("xino read error (%zd)\n", sz);
-+ }
-+
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* create and set a new xino file */
-+
-+struct file *au_xino_create(struct super_block *sb, char *fname, int silent)
-+{
-+ struct file *file;
-+ struct dentry *h_parent, *d;
-+ struct inode *h_dir, *inode;
-+ int err;
-+
-+ /*
-+ * 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.
-+ */
-+ file = vfsub_filp_open(fname, O_RDWR | O_CREAT | O_EXCL | O_LARGEFILE
-+ /* | __FMODE_NONOTIFY */,
-+ S_IRUGO | S_IWUGO);
-+ if (IS_ERR(file)) {
-+ if (!silent)
-+ pr_err("open %s(%ld)\n", fname, PTR_ERR(file));
-+ return file;
-+ }
-+
-+ /* keep file count */
-+ err = 0;
-+ inode = file_inode(file);
-+ h_parent = dget_parent(file->f_path.dentry);
-+ h_dir = d_inode(h_parent);
-+ inode_lock_nested(h_dir, AuLsc_I_PARENT);
-+ /* mnt_want_write() is unnecessary here */
-+ /* no delegation since it is just created */
-+ if (inode->i_nlink)
-+ err = vfsub_unlink(h_dir, &file->f_path, /*delegated*/NULL,
-+ /*force*/0);
-+ inode_unlock(h_dir);
-+ dput(h_parent);
-+ if (unlikely(err)) {
-+ if (!silent)
-+ pr_err("unlink %s(%d)\n", fname, err);
-+ goto out;
-+ }
-+
-+ err = -EINVAL;
-+ d = file->f_path.dentry;
-+ if (unlikely(sb == d->d_sb)) {
-+ if (!silent)
-+ pr_err("%s must be outside\n", fname);
-+ goto out;
-+ }
-+ if (unlikely(au_test_fs_bad_xino(d->d_sb))) {
-+ if (!silent)
-+ pr_err("xino doesn't support %s(%s)\n",
-+ fname, au_sbtype(d->d_sb));
-+ goto out;
-+ }
-+ return file; /* success */
-+
-+out:
-+ fput(file);
-+ file = ERR_PTR(err);
-+ return file;
-+}
-+
-+/*
-+ * find another branch who is on the same filesystem of the specified
-+ * branch{@btgt}. search until @bbot.
-+ */
-+static int is_sb_shared(struct super_block *sb, aufs_bindex_t btgt,
-+ aufs_bindex_t bbot)
-+{
-+ aufs_bindex_t bindex;
-+ struct super_block *tgt_sb = au_sbr_sb(sb, btgt);
-+
-+ for (bindex = 0; bindex < btgt; bindex++)
-+ if (unlikely(tgt_sb == au_sbr_sb(sb, bindex)))
-+ return bindex;
-+ for (bindex++; bindex <= bbot; bindex++)
-+ if (unlikely(tgt_sb == au_sbr_sb(sb, bindex)))
-+ return bindex;
-+ return -1;
-+}
-+
+/* ---------------------------------------------------------------------- */
+
+/*
-+ * initialize the xinofile for the specified branch @br
-+ * at the place/path where @base_file indicates.
-+ * test whether another branch is on the same filesystem or not,
-+ * if @do_test is true.
++ * truncate a xino bitmap file
+ */
-+int au_xino_br(struct super_block *sb, struct au_branch *br, ino_t h_ino,
-+ struct file *base_file, int do_test)
-+{
-+ int err;
-+ ino_t ino;
-+ aufs_bindex_t bbot, bindex;
-+ struct au_branch *shared_br, *b;
-+ struct file *file;
-+ struct super_block *tgt_sb;
-+
-+ shared_br = NULL;
-+ bbot = au_sbbot(sb);
-+ if (do_test) {
-+ tgt_sb = au_br_sb(br);
-+ for (bindex = 0; bindex <= bbot; bindex++) {
-+ b = au_sbr(sb, bindex);
-+ if (tgt_sb == au_br_sb(b)) {
-+ shared_br = b;
-+ break;
-+ }
-+ }
-+ }
-+
-+ if (!shared_br || !shared_br->br_xino.xi_file) {
-+ struct au_xino_lock_dir ldir;
-+
-+ au_xino_lock_dir(sb, base_file, &ldir);
-+ /* mnt_want_write() is unnecessary here */
-+ file = au_xino_create2(base_file, NULL);
-+ au_xino_unlock_dir(&ldir);
-+ err = PTR_ERR(file);
-+ if (IS_ERR(file))
-+ goto out;
-+ br->br_xino.xi_file = file;
-+ } else {
-+ br->br_xino.xi_file = shared_br->br_xino.xi_file;
-+ get_file(br->br_xino.xi_file);
-+ }
-+
-+ ino = AUFS_ROOT_INO;
-+ err = au_xino_do_write(au_sbi(sb)->si_xwrite, br->br_xino.xi_file,
-+ h_ino, ino);
-+ if (unlikely(err)) {
-+ fput(br->br_xino.xi_file);
-+ br->br_xino.xi_file = NULL;
-+ }
-+
-+out:
-+ return err;
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* trucate a xino bitmap file */
+
+/* todo: slow */
+static int do_xib_restore(struct super_block *sb, struct file *file, void *page)
+ int err;
+ aufs_bindex_t bindex, bbot;
+ void *page;
++ struct au_branch *br;
+
+ err = -ENOMEM;
+ page = (void *)__get_free_page(GFP_NOFS);
+ err = 0;
+ bbot = au_sbbot(sb);
+ for (bindex = 0; !err && bindex <= bbot; bindex++)
-+ if (!bindex || is_sb_shared(sb, bindex, bindex - 1) < 0)
-+ err = do_xib_restore
-+ (sb, au_sbr(sb, bindex)->br_xino.xi_file, page);
-+ else
-+ AuDbg("b%d\n", bindex);
++ if (!bindex || is_sb_shared(sb, bindex, bindex - 1) < 0) {
++ br = au_sbr(sb, bindex);
++ err = do_xib_restore(sb, au_xino_file(br), page);
++ } else
++ AuDbg("skip shared b%d\n", bindex);
+ free_page((unsigned long)page);
+
+out:
+ int err;
+ ssize_t sz;
+ loff_t pos;
-+ struct au_xino_lock_dir ldir;
+ struct au_sbinfo *sbinfo;
+ unsigned long *p;
+ struct file *file;
+ if (vfsub_f_size_read(file) <= PAGE_SIZE)
+ goto out;
+
-+ au_xino_lock_dir(sb, file, &ldir);
-+ /* mnt_want_write() is unnecessary here */
-+ file = au_xino_create2(sbinfo->si_xib, NULL);
-+ au_xino_unlock_dir(&ldir);
++ file = au_xino_create2(sb, &sbinfo->si_xib->f_path, NULL);
+ err = PTR_ERR(file);
+ if (IS_ERR(file))
+ goto out;
+
+/* ---------------------------------------------------------------------- */
+
++struct au_xino *au_xino_alloc(void)
++{
++ struct au_xino *xi;
++
++ xi = kzalloc(sizeof(*xi), GFP_NOFS);
++ if (unlikely(!xi))
++ goto out;
++
++ xi->xi_nondir.total = 8; /* initial size */
++ xi->xi_nondir.array = kcalloc(xi->xi_nondir.total, sizeof(ino_t),
++ GFP_NOFS);
++ if (unlikely(!xi->xi_nondir.array))
++ goto out_free;
++
++ spin_lock_init(&xi->xi_nondir.spin);
++ init_waitqueue_head(&xi->xi_nondir.wqh);
++ atomic_set(&xi->xi_truncating, 0);
++ kref_init(&xi->xi_kref);
++ goto out; /* success */
++
++out_free:
++ kfree(xi);
++ xi = NULL;
++out:
++ return xi;
++}
++
++static int au_xino_init(struct au_branch *br, struct file *file)
++{
++ int err;
++ struct au_xino *xi;
++
++ err = 0;
++ xi = au_xino_alloc();
++ if (unlikely(!xi)) {
++ err = -ENOMEM;
++ goto out;
++ }
++
++ get_file(file);
++ xi->xi_file = file;
++ AuDebugOn(br->br_xino);
++ br->br_xino = xi;
++
++out:
++ return err;
++}
++
++static void au_xino_release(struct kref *kref)
++{
++ struct au_xino *xi;
++ int i;
++
++ xi = container_of(kref, struct au_xino, xi_kref);
++ if (xi->xi_file)
++ fput(xi->xi_file);
++ for (i = xi->xi_nondir.total - 1; i >= 0; i--)
++ AuDebugOn(xi->xi_nondir.array[i]);
++ kfree(xi->xi_nondir.array);
++ kfree(xi);
++}
++
++int au_xino_put(struct au_branch *br)
++{
++ int ret;
++ struct au_xino *xi;
++
++ ret = 0;
++ xi = br->br_xino;
++ if (xi) {
++ br->br_xino = NULL;
++ ret = kref_put(&xi->xi_kref, au_xino_release);
++ }
++
++ return ret;
++}
++
++void au_xino_file_set(struct au_branch *br, struct file *file)
++{
++ struct au_xino *xi;
++ struct file *f;
++
++ if (file)
++ get_file(file);
++ xi = br->br_xino;
++ AuDebugOn(!xi);
++ f = xi->xi_file;
++ if (f)
++ fput(f);
++ xi->xi_file = file;
++}
++
++/* ---------------------------------------------------------------------- */
++
+/*
+ * xino mount option handlers
+ */
+ SiMustWriteLock(sb);
+
+ sbinfo = au_sbi(sb);
-+ sbinfo->si_xread = NULL;
-+ sbinfo->si_xwrite = NULL;
++ /* unnecessary to clear sbinfo->si_xread and ->si_xwrite */
+ if (sbinfo->si_xib)
+ fput(sbinfo->si_xib);
+ sbinfo->si_xib = NULL;
+ sbinfo->si_xib_buf = NULL;
+}
+
-+static int au_xino_set_xib(struct super_block *sb, struct file *base)
++static int au_xino_set_xib(struct super_block *sb, struct path *path)
+{
+ int err;
+ loff_t pos;
+ SiMustWriteLock(sb);
+
+ sbinfo = au_sbi(sb);
-+ file = au_xino_create2(base, sbinfo->si_xib);
++ file = au_xino_create2(sb, path, sbinfo->si_xib);
+ err = PTR_ERR(file);
+ if (IS_ERR(file))
+ goto out;
+out_unset:
+ fput(sbinfo->si_xib);
+ sbinfo->si_xib = NULL;
-+ sbinfo->si_xread = NULL;
-+ sbinfo->si_xwrite = NULL;
+out:
++ AuTraceErr(err);
+ return err;
+}
+
+ bbot = au_sbbot(sb);
+ for (bindex = 0; bindex <= bbot; bindex++) {
+ br = au_sbr(sb, bindex);
-+ if (!br || !br->br_xino.xi_file)
-+ continue;
++ AuDebugOn(!br);
++ au_xino_put(br);
++ }
++}
+
-+ fput(br->br_xino.xi_file);
-+ br->br_xino.xi_file = NULL;
++static void au_xino_set_br_shared(struct super_block *sb, struct au_branch *br,
++ aufs_bindex_t bshared)
++{
++ struct au_branch *brshared;
++
++ brshared = au_sbr(sb, bshared);
++ AuDebugOn(!brshared->br_xino);
++ AuDebugOn(!brshared->br_xino->xi_file);
++ if (br->br_xino != brshared->br_xino) {
++ au_xino_get(brshared);
++ au_xino_put(br);
++ br->br_xino = brshared->br_xino;
+ }
+}
+
-+static int au_xino_set_br(struct super_block *sb, struct file *base)
++struct au_xino_do_set_br {
++ vfs_writef_t writef;
++ struct au_branch *br;
++ ino_t h_ino;
++ aufs_bindex_t bshared;
++};
++
++static int au_xino_do_set_br(struct super_block *sb, struct path *path,
++ struct au_xino_do_set_br *args)
+{
+ int err;
-+ ino_t ino;
-+ aufs_bindex_t bindex, bbot, bshared;
-+ struct {
-+ struct file *old, *new;
-+ } *fpair, *p;
-+ struct au_branch *br;
++ struct file *file;
++
++ if (args->bshared >= 0) {
++ /* shared xino */
++ au_xino_set_br_shared(sb, args->br, args->bshared);
++ file = au_xino_file(args->br);
++ goto out_ino; /* success */
++ }
++
++ /* new xino */
++ file = au_xino_create2(sb, path, au_xino_file(args->br));
++ err = PTR_ERR(file);
++ if (IS_ERR(file))
++ goto out;
++ if (!args->br->br_xino) {
++ err = au_xino_init(args->br, file);
++ fput(file);
++ if (unlikely(err))
++ goto out;
++ } else {
++ au_xino_file_set(args->br, file);
++ fput(file);
++ }
++
++out_ino:
++ err = au_xino_do_write(args->writef, file, args->h_ino, AUFS_ROOT_INO);
++out:
++ AuTraceErr(err);
++ return err;
++}
++
++static int au_xino_set_br(struct super_block *sb, struct path *path)
++{
++ int err;
++ aufs_bindex_t bindex, bbot;
++ struct au_xino_do_set_br args;
+ struct inode *inode;
-+ vfs_writef_t writef;
+
+ SiMustWriteLock(sb);
+
-+ err = -ENOMEM;
+ bbot = au_sbbot(sb);
-+ fpair = kcalloc(bbot + 1, sizeof(*fpair), GFP_NOFS);
-+ if (unlikely(!fpair))
-+ goto out;
-+
+ inode = d_inode(sb->s_root);
-+ ino = AUFS_ROOT_INO;
-+ writef = au_sbi(sb)->si_xwrite;
-+ for (bindex = 0, p = fpair; bindex <= bbot; bindex++, p++) {
-+ bshared = is_sb_shared(sb, bindex, bindex - 1);
-+ if (bshared >= 0) {
-+ /* shared xino */
-+ *p = fpair[bshared];
-+ get_file(p->new);
-+ }
-+
-+ if (!p->new) {
-+ /* new xino */
-+ br = au_sbr(sb, bindex);
-+ p->old = br->br_xino.xi_file;
-+ p->new = au_xino_create2(base, br->br_xino.xi_file);
-+ err = PTR_ERR(p->new);
-+ if (IS_ERR(p->new)) {
-+ p->new = NULL;
-+ goto out_pair;
-+ }
-+ }
-+
-+ err = au_xino_do_write(writef, p->new,
-+ au_h_iptr(inode, bindex)->i_ino, ino);
++ args.writef = au_sbi(sb)->si_xwrite;
++ for (bindex = 0; bindex <= bbot; bindex++) {
++ args.h_ino = au_h_iptr(inode, bindex)->i_ino;
++ args.br = au_sbr(sb, bindex);
++ args.bshared = is_sb_shared(sb, bindex, bindex - 1);
++ err = au_xino_do_set_br(sb, path, &args);
+ if (unlikely(err))
-+ goto out_pair;
-+ }
-+
-+ for (bindex = 0, p = fpair; bindex <= bbot; bindex++, p++) {
-+ br = au_sbr(sb, bindex);
-+ if (br->br_xino.xi_file)
-+ fput(br->br_xino.xi_file);
-+ get_file(p->new);
-+ br->br_xino.xi_file = p->new;
++ break;
+ }
+
-+out_pair:
-+ for (bindex = 0, p = fpair; bindex <= bbot; bindex++, p++)
-+ if (p->new)
-+ fput(p->new);
-+ else
-+ break;
-+ kfree(fpair);
-+out:
++ AuTraceErr(err);
+ return err;
+}
+
+ au_xigen_clr(sb);
+ xino_clear_xib(sb);
+ xino_clear_br(sb);
++ dbgaufs_brs_del(sb, 0);
++ au_xino_brid_set(sb, -1);
+ sbinfo = au_sbi(sb);
+ /* lvalue, do not call au_mntflags() */
+ au_opt_clr(sbinfo->si_mntflags, XINO);
+}
+
-+int au_xino_set(struct super_block *sb, struct au_opt_xino *xino, int remount)
++int au_xino_set(struct super_block *sb, struct au_opt_xino *xiopt, int remount)
+{
+ int err, skip;
-+ struct dentry *parent, *cur_parent;
++ struct dentry *dentry, *parent, *cur_dentry, *cur_parent;
+ struct qstr *dname, *cur_name;
+ struct file *cur_xino;
-+ struct inode *dir;
+ struct au_sbinfo *sbinfo;
++ struct path *path, *cur_path;
+
+ SiMustWriteLock(sb);
+
+ err = 0;
+ sbinfo = au_sbi(sb);
-+ parent = dget_parent(xino->file->f_path.dentry);
++ path = &xiopt->file->f_path;
++ dentry = path->dentry;
++ parent = dget_parent(dentry);
+ if (remount) {
+ skip = 0;
-+ dname = &xino->file->f_path.dentry->d_name;
+ cur_xino = sbinfo->si_xib;
+ if (cur_xino) {
-+ cur_parent = dget_parent(cur_xino->f_path.dentry);
-+ cur_name = &cur_xino->f_path.dentry->d_name;
++ cur_path = &cur_xino->f_path;
++ cur_dentry = cur_path->dentry;
++ cur_parent = dget_parent(cur_dentry);
++ cur_name = &cur_dentry->d_name;
++ dname = &dentry->d_name;
+ skip = (cur_parent == parent
+ && au_qstreq(dname, cur_name));
+ dput(cur_parent);
+ }
+
+ au_opt_set(sbinfo->si_mntflags, XINO);
-+ dir = d_inode(parent);
-+ inode_lock_nested(dir, AuLsc_I_PARENT);
-+ /* mnt_want_write() is unnecessary here */
-+ err = au_xino_set_xib(sb, xino->file);
++ err = au_xino_set_xib(sb, path);
++ /* si_x{read,write} are set */
+ if (!err)
-+ err = au_xigen_set(sb, xino->file);
-+ if (!err)
-+ err = au_xino_set_br(sb, xino->file);
-+ inode_unlock(dir);
++ err = au_xigen_set(sb, path);
+ if (!err)
++ err = au_xino_set_br(sb, path);
++ if (!err) {
++ dbgaufs_brs_add(sb, 0, /*topdown*/1);
+ goto out; /* success */
++ }
+
+ /* reset all */
-+ AuIOErr("failed creating xino(%d).\n", err);
-+ au_xigen_clr(sb);
-+ xino_clear_xib(sb);
++ AuIOErr("failed setting xino(%d).\n", err);
++ au_xino_clr(sb);
+
+out:
+ dput(parent);
+ return err;
+}
+
-+/* ---------------------------------------------------------------------- */
-+
+/*
+ * create a xinofile at the default place/path.
+ */
+
+/* ---------------------------------------------------------------------- */
+
-+int au_xino_path(struct seq_file *seq, struct file *file)
++/*
++ * initialize the xinofile for the specified branch @br
++ * at the place/path where @base_file indicates.
++ * test whether another branch is on the same filesystem or not,
++ * if found then share the xinofile with another branch.
++ */
++int au_xino_init_br(struct super_block *sb, struct au_branch *br, ino_t h_ino,
++ struct path *base)
+{
+ int err;
++ struct au_xino_do_set_br args = {
++ .h_ino = h_ino,
++ .br = br
++ };
+
-+ err = au_seq_path(seq, &file->f_path);
++ args.writef = au_sbi(sb)->si_xwrite;
++ args.bshared = sbr_find_shared(sb, /*btop*/0, au_sbbot(sb),
++ au_br_sb(br));
++ err = au_xino_do_set_br(sb, base, &args);
+ if (unlikely(err))
-+ goto out;
++ au_xino_put(br);
+
-+#define Deleted "\\040(deleted)"
-+ seq->count -= sizeof(Deleted) - 1;
-+ AuDebugOn(memcmp(seq->buf + seq->count, Deleted,
-+ sizeof(Deleted) - 1));
-+#undef Deleted
-+
-+out:
+ return err;
+}
+
+/* ---------------------------------------------------------------------- */
+
-+void au_xinondir_leave(struct super_block *sb, aufs_bindex_t bindex,
-+ ino_t h_ino, int idx)
++/*
++ * get an unused inode number from bitmap
++ */
++ino_t au_xino_new_ino(struct super_block *sb)
+{
-+ struct au_xino_file *xino;
++ ino_t ino;
++ unsigned long *p, pindex, ul, pend;
++ struct au_sbinfo *sbinfo;
++ struct file *file;
++ int free_bit, err;
+
-+ AuDebugOn(!au_opt_test(au_mntflags(sb), XINO));
-+ xino = &au_sbr(sb, bindex)->br_xino;
-+ AuDebugOn(idx < 0 || xino->xi_nondir.total <= idx);
++ if (!au_opt_test(au_mntflags(sb), XINO))
++ return iunique(sb, AUFS_FIRST_INO);
++
++ sbinfo = au_sbi(sb);
++ mutex_lock(&sbinfo->si_xib_mtx);
++ p = sbinfo->si_xib_buf;
++ free_bit = sbinfo->si_xib_next_bit;
++ if (free_bit < page_bits && !test_bit(free_bit, p))
++ goto out; /* success */
++ free_bit = find_first_zero_bit(p, page_bits);
++ if (free_bit < page_bits)
++ goto out; /* success */
++
++ pindex = sbinfo->si_xib_last_pindex;
++ for (ul = pindex - 1; ul < ULONG_MAX; ul--) {
++ err = xib_pindex(sb, ul);
++ if (unlikely(err))
++ goto out_err;
++ free_bit = find_first_zero_bit(p, page_bits);
++ if (free_bit < page_bits)
++ goto out; /* success */
++ }
++
++ file = sbinfo->si_xib;
++ pend = vfsub_f_size_read(file) / PAGE_SIZE;
++ for (ul = pindex + 1; ul <= pend; ul++) {
++ err = xib_pindex(sb, ul);
++ if (unlikely(err))
++ goto out_err;
++ free_bit = find_first_zero_bit(p, page_bits);
++ if (free_bit < page_bits)
++ goto out; /* success */
++ }
++ BUG();
++
++out:
++ set_bit(free_bit, p);
++ sbinfo->si_xib_next_bit = free_bit + 1;
++ pindex = sbinfo->si_xib_last_pindex;
++ mutex_unlock(&sbinfo->si_xib_mtx);
++ ino = xib_calc_ino(pindex, free_bit);
++ AuDbg("i%lu\n", (unsigned long)ino);
++ return ino;
++out_err:
++ mutex_unlock(&sbinfo->si_xib_mtx);
++ AuDbg("i0\n");
++ return 0;
++}
++
++/* for s_op->delete_inode() */
++void au_xino_delete_inode(struct inode *inode, const int unlinked)
++{
++ int err;
++ unsigned int mnt_flags;
++ aufs_bindex_t bindex, bbot, bi;
++ unsigned char try_trunc;
++ struct au_iinfo *iinfo;
++ struct super_block *sb;
++ struct au_hinode *hi;
++ struct inode *h_inode;
++ struct au_branch *br;
++ vfs_writef_t xwrite;
++
++ AuDebugOn(au_is_bad_inode(inode));
++
++ sb = inode->i_sb;
++ mnt_flags = au_mntflags(sb);
++ if (!au_opt_test(mnt_flags, XINO)
++ || inode->i_ino == AUFS_ROOT_INO)
++ return;
++
++ if (unlinked) {
++ au_xigen_inc(inode);
++ au_xib_clear_bit(inode);
++ }
++
++ iinfo = au_ii(inode);
++ bindex = iinfo->ii_btop;
++ if (bindex < 0)
++ return;
+
-+ spin_lock(&xino->xi_nondir.spin);
-+ AuDebugOn(xino->xi_nondir.array[idx] != h_ino);
-+ xino->xi_nondir.array[idx] = 0;
-+ spin_unlock(&xino->xi_nondir.spin);
-+ wake_up_all(&xino->xi_nondir.wqh);
++ xwrite = au_sbi(sb)->si_xwrite;
++ try_trunc = !!au_opt_test(mnt_flags, TRUNC_XINO);
++ hi = au_hinode(iinfo, bindex);
++ bbot = iinfo->ii_bbot;
++ for (; bindex <= bbot; bindex++, hi++) {
++ h_inode = hi->hi_inode;
++ if (!h_inode
++ || (!unlinked && h_inode->i_nlink))
++ continue;
++
++ /* inode may not be revalidated */
++ bi = au_br_index(sb, hi->hi_id);
++ if (bi < 0)
++ continue;
++
++ br = au_sbr(sb, bi);
++ err = au_xino_do_write(xwrite, au_xino_file(br),
++ h_inode->i_ino, /*ino*/0);
++ if (!err && try_trunc
++ && au_test_fs_trunc_xino(au_br_sb(br)))
++ xino_try_trunc(sb, br);
++ }
+}
+
-+static int au_xinondir_find(struct au_xino_file *xino, ino_t h_ino)
++/* ---------------------------------------------------------------------- */
++
++static int au_xinondir_find(struct au_xino *xi, ino_t h_ino)
+{
+ int found, total, i;
+
+ found = -1;
-+ total = xino->xi_nondir.total;
++ total = xi->xi_nondir.total;
+ for (i = 0; i < total; i++) {
-+ if (xino->xi_nondir.array[i] != h_ino)
++ if (xi->xi_nondir.array[i] != h_ino)
+ continue;
+ found = i;
+ break;
+ return found;
+}
+
-+static int au_xinondir_expand(struct au_xino_file *xino)
++static int au_xinondir_expand(struct au_xino *xi)
+{
+ int err, sz;
+ ino_t *p;
+ BUILD_BUG_ON(KMALLOC_MAX_SIZE > INT_MAX);
+
+ err = -ENOMEM;
-+ sz = xino->xi_nondir.total * sizeof(ino_t);
++ sz = xi->xi_nondir.total * sizeof(ino_t);
+ if (unlikely(sz > KMALLOC_MAX_SIZE / 2))
+ goto out;
-+ p = au_kzrealloc(xino->xi_nondir.array, sz, sz << 1, GFP_ATOMIC,
++ p = au_kzrealloc(xi->xi_nondir.array, sz, sz << 1, GFP_ATOMIC,
+ /*may_shrink*/0);
+ if (p) {
-+ xino->xi_nondir.array = p;
-+ xino->xi_nondir.total <<= 1;
-+ AuDbg("xi_nondir.total %d\n", xino->xi_nondir.total);
++ xi->xi_nondir.array = p;
++ xi->xi_nondir.total <<= 1;
++ AuDbg("xi_nondir.total %d\n", xi->xi_nondir.total);
+ err = 0;
+ }
+
+ return err;
+}
+
++void au_xinondir_leave(struct super_block *sb, aufs_bindex_t bindex,
++ ino_t h_ino, int idx)
++{
++ struct au_xino *xi;
++
++ AuDebugOn(!au_opt_test(au_mntflags(sb), XINO));
++ xi = au_sbr(sb, bindex)->br_xino;
++ AuDebugOn(idx < 0 || xi->xi_nondir.total <= idx);
++
++ spin_lock(&xi->xi_nondir.spin);
++ AuDebugOn(xi->xi_nondir.array[idx] != h_ino);
++ xi->xi_nondir.array[idx] = 0;
++ spin_unlock(&xi->xi_nondir.spin);
++ wake_up_all(&xi->xi_nondir.wqh);
++}
++
+int au_xinondir_enter(struct super_block *sb, aufs_bindex_t bindex, ino_t h_ino,
+ int *idx)
+{
+ int err, found, empty;
-+ struct au_xino_file *xino;
++ struct au_xino *xi;
+
+ err = 0;
+ *idx = -1;
+ if (!au_opt_test(au_mntflags(sb), XINO))
+ goto out; /* no xino */
+
-+ xino = &au_sbr(sb, bindex)->br_xino;
++ xi = au_sbr(sb, bindex)->br_xino;
+
+again:
-+ spin_lock(&xino->xi_nondir.spin);
-+ found = au_xinondir_find(xino, h_ino);
++ spin_lock(&xi->xi_nondir.spin);
++ found = au_xinondir_find(xi, h_ino);
+ if (found == -1) {
-+ empty = au_xinondir_find(xino, /*h_ino*/0);
++ empty = au_xinondir_find(xi, /*h_ino*/0);
+ if (empty == -1) {
-+ empty = xino->xi_nondir.total;
-+ err = au_xinondir_expand(xino);
++ empty = xi->xi_nondir.total;
++ err = au_xinondir_expand(xi);
+ if (unlikely(err))
+ goto out_unlock;
+ }
-+ xino->xi_nondir.array[empty] = h_ino;
++ xi->xi_nondir.array[empty] = h_ino;
+ *idx = empty;
+ } else {
-+ spin_unlock(&xino->xi_nondir.spin);
-+ wait_event(xino->xi_nondir.wqh,
-+ xino->xi_nondir.array[found] != h_ino);
++ spin_unlock(&xi->xi_nondir.spin);
++ wait_event(xi->xi_nondir.wqh,
++ xi->xi_nondir.array[found] != h_ino);
+ goto again;
+ }
+
+out_unlock:
-+ spin_unlock(&xino->xi_nondir.spin);
++ spin_unlock(&xi->xi_nondir.spin);
++out:
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++int au_xino_path(struct seq_file *seq, struct file *file)
++{
++ int err;
++
++ err = au_seq_path(seq, &file->f_path);
++ if (unlikely(err))
++ goto out;
++
++#define Deleted "\\040(deleted)"
++ seq->count -= sizeof(Deleted) - 1;
++ AuDebugOn(memcmp(seq->buf + seq->count, Deleted,
++ sizeof(Deleted) - 1));
++#undef Deleted
++
+out:
+ return err;
+}
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 2017-07-31 10:12:14.139177930 +0200
-@@ -0,0 +1,419 @@
++++ linux/include/uapi/linux/aufs_type.h 2018-08-12 23:43:05.466791610 +0200
+@@ -0,0 +1,448 @@
++/* SPDX-License-Identifier: GPL-2.0 */
+/*
-+ * Copyright (C) 2005-2017 Junjiro R. Okajima
++ * Copyright (C) 2005-2018 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 "4.11.7+-20170703"
++#define AUFS_VERSION "4.x-rcN-20180730"
+
+/* todo? move this to linux-2.6.19/include/magic.h */
+#define AUFS_SUPER_MAGIC ('a' << 24 | 'u' << 16 | 'f' << 8 | 's')
+#define AUFS_PLINK_MAINT_DIR "fs/" AUFS_NAME
+#define AUFS_PLINK_MAINT_PATH AUFS_PLINK_MAINT_DIR "/" AUFS_PLINK_MAINT_NAME
+
++/* dirren, renamed dir */
++#define AUFS_DR_INFO_PFX AUFS_WH_PFX ".dr."
++#define AUFS_DR_BRHINO_NAME AUFS_WH_PFX "hino"
++/* whiteouted doubly */
++#define AUFS_WH_DR_INFO_PFX AUFS_WH_PFX AUFS_DR_INFO_PFX
++#define AUFS_WH_DR_BRHINO AUFS_WH_PFX AUFS_DR_BRHINO_NAME
++
+#define AUFS_DIROPQ_NAME AUFS_WH_PFX ".opq" /* whiteouted doubly */
+#define AUFS_WH_DIROPQ AUFS_WH_PFX AUFS_DIROPQ_NAME
+
+
+/* ---------------------------------------------------------------------- */
+
++/* dirren. the branch is identified by the filename who contains this */
++struct au_drinfo {
++ uint64_t ino;
++ union {
++ uint8_t oldnamelen;
++ uint64_t _padding;
++ };
++ uint8_t oldname[0];
++} __aligned(8);
++
++struct au_drinfo_fdata {
++ uint32_t magic;
++ struct au_drinfo drinfo;
++} __aligned(8);
++
++#define AUFS_DRINFO_MAGIC_V1 ('a' << 24 | 'd' << 16 | 'r' << 8 | 0x01)
++/* future */
++#define AUFS_DRINFO_MAGIC_V2 ('a' << 24 | 'd' << 16 | 'r' << 8 | 0x02)
++
++/* ---------------------------------------------------------------------- */
++
+struct aufs_wbr_fd {
+ uint32_t oflags;
+ int16_t brid;
+#define AUFS_CTL_FHSM_FD _IOW(AuCtlType, AuCtl_FHSM_FD, int)
+
+#endif /* __AUFS_TYPE_H__ */
-aufs4.11.7+ loopback patch
+SPDX-License-Identifier: GPL-2.0
+aufs4.x-rcN loopback patch
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
-index cf39138..29b33b2 100644
+index 5678bf8..ec9c4fb 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
-@@ -551,7 +551,7 @@ static int do_req_filebacked(struct loop_device *lo, struct request *rq)
+@@ -626,6 +626,15 @@ static inline void loop_update_dio(struct loop_device *lo)
+ lo->use_dio);
}
- struct switch_request {
-- struct file *file;
-+ struct file *file, *virt_file;
- struct completion wait;
- };
-
-@@ -577,6 +577,7 @@ static void do_loop_switch(struct loop_device *lo, struct switch_request *p)
- mapping = file->f_mapping;
- mapping_set_gfp_mask(old_file->f_mapping, lo->old_gfp_mask);
- lo->lo_backing_file = file;
-+ lo->lo_backing_virt_file = p->virt_file;
- lo->lo_blocksize = S_ISBLK(mapping->host->i_mode) ?
- mapping->host->i_bdev->bd_block_size : PAGE_SIZE;
- lo->old_gfp_mask = mapping_gfp_mask(mapping);
-@@ -589,11 +590,13 @@ static void do_loop_switch(struct loop_device *lo, struct switch_request *p)
- * First it needs to flush existing IO, it does this by sending a magic
- * BIO down the pipe. The completion of this BIO does the actual switch.
- */
--static int loop_switch(struct loop_device *lo, struct file *file)
-+static int loop_switch(struct loop_device *lo, struct file *file,
-+ struct file *virt_file)
- {
- struct switch_request w;
-
- w.file = file;
-+ w.virt_file = virt_file;
-
- /* freeze queue and wait for completion of scheduled requests */
- blk_mq_freeze_queue(lo->lo_queue);
-@@ -612,7 +615,16 @@ static int loop_switch(struct loop_device *lo, struct file *file)
- */
- static int loop_flush(struct loop_device *lo)
- {
-- return loop_switch(lo, NULL);
-+ return loop_switch(lo, NULL, NULL);
-+}
-+
+static struct file *loop_real_file(struct file *file)
+{
+ struct file *f = NULL;
+ if (file->f_path.dentry->d_sb->s_op->real_loop)
+ f = file->f_path.dentry->d_sb->s_op->real_loop(file);
+ return f;
- }
-
++}
++
static void loop_reread_partitions(struct loop_device *lo,
-@@ -649,6 +661,7 @@ static int loop_change_fd(struct loop_device *lo, struct block_device *bdev,
+ struct block_device *bdev)
+ {
+@@ -690,6 +699,7 @@ static int loop_change_fd(struct loop_device *lo, struct block_device *bdev,
unsigned int arg)
{
struct file *file, *old_file;
struct inode *inode;
int error;
-@@ -665,9 +678,16 @@ static int loop_change_fd(struct loop_device *lo, struct block_device *bdev,
+@@ -706,6 +716,12 @@ static int loop_change_fd(struct loop_device *lo, struct block_device *bdev,
file = fget(arg);
if (!file)
goto out;
+ get_file(file);
+ }
+ error = loop_validate_file(file, bdev);
+ if (error)
+@@ -713,6 +729,7 @@ static int loop_change_fd(struct loop_device *lo, struct block_device *bdev,
+
inode = file->f_mapping->host;
old_file = lo->lo_backing_file;
+ old_virt_file = lo->lo_backing_virt_file;
error = -EINVAL;
-@@ -679,17 +699,21 @@ static int loop_change_fd(struct loop_device *lo, struct block_device *bdev,
- goto out_putf;
-
- /* and ... switch */
-- error = loop_switch(lo, file);
-+ error = loop_switch(lo, file, virt_file);
- if (error)
- goto out_putf;
+@@ -724,6 +741,7 @@ 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->lo_backing_virt_file = virt_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));
+@@ -731,12 +749,16 @@ static int loop_change_fd(struct loop_device *lo, struct block_device *bdev,
+ blk_mq_unfreeze_queue(lo->lo_queue);
fput(old_file);
+ if (old_virt_file)
out:
return error;
}
-@@ -876,7 +900,7 @@ static int loop_prepare_queue(struct loop_device *lo)
+@@ -924,7 +946,7 @@ 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)
{
-- struct file *file, *f;
+- struct file *file;
+ struct file *file, *f, *virt_file = NULL;
struct inode *inode;
struct address_space *mapping;
- unsigned lo_blocksize;
-@@ -891,6 +915,12 @@ static int loop_set_fd(struct loop_device *lo, fmode_t mode,
+ int lo_flags = 0;
+@@ -938,6 +960,12 @@ static int loop_set_fd(struct loop_device *lo, fmode_t mode,
file = fget(arg);
if (!file)
goto out;
error = -EBUSY;
if (lo->lo_state != Lo_unbound)
-@@ -943,6 +973,7 @@ static int loop_set_fd(struct loop_device *lo, fmode_t mode,
+@@ -970,6 +998,7 @@ 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;
-@@ -975,6 +1006,8 @@ static int loop_set_fd(struct loop_device *lo, fmode_t mode,
+@@ -1003,6 +1032,8 @@ static int loop_set_fd(struct loop_device *lo, fmode_t mode,
out_putf:
fput(file);
out:
/* This is safe: open() is still holding a reference. */
module_put(THIS_MODULE);
-@@ -1021,6 +1054,7 @@ loop_init_xfer(struct loop_device *lo, struct loop_func_table *xfer,
+@@ -1049,6 +1080,7 @@ loop_init_xfer(struct loop_device *lo, struct loop_func_table *xfer,
static int loop_clr_fd(struct loop_device *lo)
{
struct file *filp = lo->lo_backing_file;
gfp_t gfp = lo->old_gfp_mask;
struct block_device *bdev = lo->lo_device;
-@@ -1052,6 +1086,7 @@ static int loop_clr_fd(struct loop_device *lo)
+@@ -1080,6 +1112,7 @@ 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;
spin_unlock_irq(&lo->lo_lock);
loop_release_xfer(lo);
-@@ -1096,6 +1131,8 @@ static int loop_clr_fd(struct loop_device *lo)
+@@ -1128,6 +1161,8 @@ static int loop_clr_fd(struct loop_device *lo)
* bd_mutex which is usually taken before lo_ctl_mutex.
*/
fput(filp);
}
diff --git a/drivers/block/loop.h b/drivers/block/loop.h
-index fb2237c..c3888c5 100644
+index 4d42c7a..a4974ee 100644
--- a/drivers/block/loop.h
+++ b/drivers/block/loop.h
@@ -46,7 +46,7 @@ struct loop_device {
- struct file * lo_backing_file;
+ struct file * lo_backing_file, *lo_backing_virt_file;
struct block_device *lo_device;
- unsigned lo_blocksize;
void *key_data;
+
diff --git a/fs/aufs/f_op.c b/fs/aufs/f_op.c
-index 870717e..ea7fee0 100644
+index 937a20d..1355656 100644
--- a/fs/aufs/f_op.c
+++ b/fs/aufs/f_op.c
-@@ -357,7 +357,7 @@ static ssize_t aufs_read_iter(struct kiocb *kio, struct iov_iter *iov_iter)
+@@ -358,7 +358,7 @@ static ssize_t aufs_read_iter(struct kiocb *kio, struct iov_iter *iov_iter)
if (IS_ERR(h_file))
goto out;
if (file->f_mapping != h_file->f_mapping) {
file->f_mapping = h_file->f_mapping;
diff --git a/fs/aufs/loop.c b/fs/aufs/loop.c
-index e35f015..b37f1ae 100644
+index 3d84349..a642de5 100644
--- a/fs/aufs/loop.c
+++ b/fs/aufs/loop.c
-@@ -132,3 +132,19 @@ void au_loopback_fin(void)
+@@ -133,3 +133,19 @@ void au_loopback_fin(void)
symbol_put(loop_backing_file);
kfree(au_warn_loopback_array);
}
+ return f;
+}
diff --git a/fs/aufs/loop.h b/fs/aufs/loop.h
-index e2df495..36e5052 100644
+index 05d703d..6bb23c8 100644
--- a/fs/aufs/loop.h
+++ b/fs/aufs/loop.h
-@@ -25,7 +25,11 @@ void au_warn_loopback(struct super_block *h_sb);
+@@ -26,7 +26,11 @@ void au_warn_loopback(struct super_block *h_sb);
int au_loopback_init(void);
void au_loopback_fin(void);
AuStubInt0(au_test_loopback_overlap, struct super_block *sb,
struct dentry *h_adding)
AuStubInt0(au_test_loopback_kthread, void)
-@@ -33,6 +37,8 @@ AuStubVoid(au_warn_loopback, struct super_block *h_sb)
+@@ -34,6 +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 5455fb1..8b9df60 100644
+index 4020639..13e315f 100644
--- a/fs/aufs/super.c
+++ b/fs/aufs/super.c
-@@ -837,7 +837,10 @@ static const struct super_operations aufs_sop = {
+@@ -840,7 +840,10 @@ 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 433e314..b008398 100644
+index 0d0d247f..50d77f8 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
-@@ -1810,6 +1810,10 @@ struct super_operations {
+@@ -1861,6 +1861,10 @@ struct super_operations {
struct shrink_control *);
long (*free_cached_objects)(struct super_block *,
struct shrink_control *);