-aufs3.16 kbuild patch
+aufs3.x-rcN kbuild patch
diff --git a/fs/Kconfig b/fs/Kconfig
-index 312393f..78632ed 100644
+index ec35851..a059d62 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
-@@ -209,6 +209,7 @@ source "fs/ufs/Kconfig"
+@@ -218,6 +218,7 @@ source "fs/sysv/Kconfig"
+ source "fs/ufs/Kconfig"
source "fs/exofs/Kconfig"
source "fs/f2fs/Kconfig"
- source "fs/efivarfs/Kconfig"
+source "fs/aufs/Kconfig"
endif # MISC_FILESYSTEMS
diff --git a/fs/Makefile b/fs/Makefile
-index 4030cbf..5bd169a 100644
+index a88ac48..162500e 100644
--- a/fs/Makefile
+++ b/fs/Makefile
-@@ -125,3 +125,4 @@ obj-y += exofs/ # Multiple modules
+@@ -126,3 +126,4 @@ obj-y += exofs/ # Multiple modules
obj-$(CONFIG_CEPH_FS) += ceph/
obj-$(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 24e9033..fe9a8d4 100644
+index 68ceb97..0352fa4 100644
--- a/include/uapi/linux/Kbuild
+++ b/include/uapi/linux/Kbuild
-@@ -56,6 +56,7 @@ header-y += atmppp.h
- header-y += atmsap.h
- header-y += atmsvc.h
+@@ -58,6 +58,7 @@ 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_fs.h
header-y += auto_fs4.h
+ header-y += auto_fs.h
header-y += auxvec.h
-aufs3.16 base patch
+aufs3.x-rcN base patch
+diff --git a/MAINTAINERS b/MAINTAINERS
+index efbcb50..30a1654 100644
+--- a/MAINTAINERS
++++ b/MAINTAINERS
+@@ -1864,6 +1864,20 @@ F: include/linux/audit.h
+ F: include/uapi/linux/audit.h
+ F: kernel/audit*
+
++AUFS (advanced multi layered unification filesystem) FILESYSTEM
++M: "J. R. Okajima" <hooanon05g@gmail.com>
++L: linux-unionfs@vger.kernel.org
++L: aufs-users@lists.sourceforge.net (members only)
++W: http://aufs.sourceforge.net
++T: git://git.code.sf.net/p/aufs/aufs3-linux
++T: git://github.com/sfjro/aufs3-linux.git
++S: Supported
++F: Documentation/filesystems/aufs/
++F: Documentation/ABI/testing/debugfs-aufs
++F: Documentation/ABI/testing/sysfs-aufs
++F: fs/aufs/
++F: include/uapi/linux/aufs_type.h
++
+ AUXILIARY DISPLAY DRIVERS
+ M: Miguel Ojeda Sandonis <miguel.ojeda.sandonis@gmail.com>
+ W: http://miguelojeda.es/auxdisplay.htm
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
-index 6cb1beb..30efd68 100644
+index d1f168b..a0da519 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
-@@ -692,6 +692,24 @@ static inline int is_loop_device(struct file *file)
+@@ -592,6 +592,24 @@ static inline int is_loop_device(struct file *file)
return i && S_ISBLK(i->i_mode) && MAJOR(i->i_rdev) == LOOP_MAJOR;
}
/* loop sysfs attributes */
static ssize_t loop_attr_show(struct device *dev, char *page,
-diff --git a/fs/inode.c b/fs/inode.c
-index 6eecb7f..b225c0f 100644
---- a/fs/inode.c
-+++ b/fs/inode.c
-@@ -1496,7 +1496,7 @@ static int relatime_need_update(struct vfsmount *mnt, struct inode *inode,
- * This does the actual work of updating an inodes time or version. Must have
- * had called mnt_want_write() before calling this.
+diff --git a/fs/dcache.c b/fs/dcache.c
+index c71e373..b93a9f2 100644
+--- a/fs/dcache.c
++++ b/fs/dcache.c
+@@ -1130,7 +1130,7 @@ enum d_walk_ret {
+ *
+ * The @enter() and @finish() callbacks are called with d_lock held.
*/
--static int update_time(struct inode *inode, struct timespec *time, int flags)
-+int update_time(struct inode *inode, struct timespec *time, int flags)
+-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 *))
{
- if (inode->i_op->update_time)
- return inode->i_op->update_time(inode, time, flags);
diff --git a/fs/splice.c b/fs/splice.c
-index f5cb9ba..9ba380c 100644
+index 7968da9..beb9993 100644
--- a/fs/splice.c
+++ b/fs/splice.c
-@@ -1114,8 +1114,8 @@ EXPORT_SYMBOL(generic_splice_sendpage);
+@@ -1099,8 +1099,8 @@ 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);
-@@ -1131,9 +1131,9 @@ static long do_splice_from(struct pipe_inode_info *pipe, struct file *out,
+@@ -1116,9 +1116,9 @@ 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/include/linux/fs.h b/include/linux/fs.h
-index e11d60c..2f32b35 100644
---- a/include/linux/fs.h
-+++ b/include/linux/fs.h
-@@ -2618,6 +2618,7 @@ extern int inode_change_ok(const struct inode *, struct iattr *);
- extern int inode_newsize_ok(const struct inode *, loff_t offset);
- extern void setattr_copy(struct inode *inode, const struct iattr *attr);
-
-+extern int update_time(struct inode *, struct timespec *, int);
- extern int file_update_time(struct file *file);
+diff --git a/include/linux/file.h b/include/linux/file.h
+index f87d308..9a290b3 100644
+--- a/include/linux/file.h
++++ b/include/linux/file.h
+@@ -19,6 +19,7 @@ struct dentry;
+ struct path;
+ extern struct file *alloc_file(struct path *, fmode_t mode,
+ const struct file_operations *fop);
++extern struct file *get_empty_filp(void);
- extern int generic_show_options(struct seq_file *m, struct dentry *root);
+ static inline void fput_light(struct file *file, int fput_needed)
+ {
diff --git a/include/linux/splice.h b/include/linux/splice.h
index da2751d..2e0fca6 100644
--- a/include/linux/splice.h
+ struct pipe_inode_info *pipe, size_t len,
+ unsigned int flags);
#endif
-aufs3.16 mmap patch
+aufs3.x-rcN mmap patch
diff --git a/fs/buffer.c b/fs/buffer.c
-index eba6e4f..31f0b2d 100644
+index 20805db..363569f 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
-@@ -2460,7 +2460,7 @@ int block_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf,
+@@ -2450,7 +2450,7 @@ int block_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf,
* Update file times before taking page lock. We may end up failing the
* fault so this update may be superfluous but who really cares...
*/
ret = __block_page_mkwrite(vma, vmf, get_block);
sb_end_pagefault(sb);
+diff --git a/fs/proc/base.c b/fs/proc/base.c
+index 3f3d7ae..426bcc7 100644
+--- a/fs/proc/base.c
++++ b/fs/proc/base.c
+@@ -1735,7 +1735,7 @@ static int proc_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) {
+- *path = vma->vm_file->f_path;
++ *path = vma_pr_or_file(vma)->f_path;
+ path_get(path);
+ rc = 0;
+ }
diff --git a/fs/proc/nommu.c b/fs/proc/nommu.c
index d4a3574..1397181 100644
--- a/fs/proc/nommu.c
ino = inode->i_ino;
}
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
-index cfa63ee..bf4919e 100644
+index 6dee68d..9afa35d 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
-@@ -265,7 +265,10 @@ show_map_vma(struct seq_file *m, struct vm_area_struct *vma, int is_pid)
+@@ -279,7 +279,10 @@ 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;
-@@ -1390,7 +1393,7 @@ static int show_numa_map(struct seq_file *m, void *v, int is_pid)
+@@ -1479,7 +1482,7 @@ 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 file *file = vma->vm_file;
+ struct file *file = vma_pr_or_file(vma);
- struct task_struct *task = proc_priv->task;
struct mm_struct *mm = vma->vm_mm;
- struct mm_walk walk = {};
+ struct mm_walk walk = {
+ .hugetlb_entry = gather_hugetlb_stats,
diff --git a/fs/proc/task_nommu.c b/fs/proc/task_nommu.c
-index 678455d..0ef7ef4 100644
+index 599ec2e..1740207 100644
--- a/fs/proc/task_nommu.c
+++ b/fs/proc/task_nommu.c
-@@ -141,7 +141,10 @@ static int nommu_vma_show(struct seq_file *m, struct vm_area_struct *vma,
+@@ -160,7 +160,10 @@ static int nommu_vma_show(struct seq_file *m, struct vm_area_struct *vma,
file = vma->vm_file;
if (file) {
- struct inode *inode = file_inode(vma->vm_file);
+ struct inode *inode;
+
-+ file = vma_pr_or_file(file);
++ file = vma_pr_or_file(vma);
+ inode = file_inode(file);
dev = inode->i_sb->s_dev;
ino = inode->i_ino;
pgoff = (loff_t)vma->vm_pgoff << PAGE_SHIFT;
diff --git a/include/linux/mm.h b/include/linux/mm.h
-index e03dd29..dd32624 100644
+index 47a9392..c8f8b46 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
-@@ -1184,6 +1184,28 @@ static inline int fixup_user_fault(struct task_struct *tsk,
+@@ -1254,6 +1254,28 @@ static inline int fixup_user_fault(struct task_struct *tsk,
}
#endif
-+#ifdef CONFIG_MMU
+extern void vma_do_file_update_time(struct vm_area_struct *, const char[], int);
+extern struct file *vma_do_pr_or_file(struct vm_area_struct *, const char[],
+ int);
+ __LINE__)
+#define vma_get_file(vma) vma_do_get_file(vma, __func__, __LINE__)
+#define vma_fput(vma) vma_do_fput(vma, __func__, __LINE__)
-+#else
++
++#ifndef CONFIG_MMU
+extern struct file *vmr_do_pr_or_file(struct vm_region *, const char[], int);
+extern void vmr_do_fput(struct vm_region *, const char[], int);
+
+#define vmr_pr_or_file(region) vmr_do_pr_or_file(region, __func__, \
+ __LINE__)
+#define vmr_fput(region) vmr_do_fput(region, __func__, __LINE__)
-+#endif /* CONFIG_MMU */
++#endif /* !CONFIG_MMU */
+
extern int access_process_vm(struct task_struct *tsk, unsigned long addr, void *buf, int len, int write);
extern int access_remote_vm(struct mm_struct *mm, unsigned long addr,
void *buf, int len, int write);
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
-index 96c5750..a087ecd 100644
+index 199a03a..ed38ea3 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
-@@ -232,6 +232,7 @@ struct vm_region {
+@@ -241,6 +241,7 @@ 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
-@@ -300,6 +301,7 @@ struct vm_area_struct {
+@@ -305,6 +306,7 @@ struct vm_area_struct {
unsigned long vm_pgoff; /* Offset (within vm_file) in PAGE_SIZE
units, *not* PAGE_CACHE_SIZE */
struct file * vm_file; /* File we map to (can be NULL). */
#ifndef CONFIG_MMU
diff --git a/kernel/fork.c b/kernel/fork.c
-index 6a13c46..714302c 100644
+index cf65139..f28a048 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
-@@ -416,7 +416,7 @@ static int dup_mmap(struct mm_struct *mm, struct mm_struct *oldmm)
+@@ -430,7 +430,7 @@ static int dup_mmap(struct mm_struct *mm, struct mm_struct *oldmm)
struct inode *inode = file_inode(file);
struct address_space *mapping = file->f_mapping;
+ vma_get_file(tmp);
if (tmp->vm_flags & VM_DENYWRITE)
atomic_dec(&inode->i_writecount);
- mutex_lock(&mapping->i_mmap_mutex);
+ i_mmap_lock_write(mapping);
diff --git a/mm/Makefile b/mm/Makefile
-index 4064f3e..0003fdf 100644
+index 15dbe99..88e25b5 100644
--- a/mm/Makefile
+++ b/mm/Makefile
-@@ -18,7 +18,7 @@ obj-y := filemap.o mempool.o oom_kill.o fadvise.o \
+@@ -21,7 +21,7 @@ obj-y := filemap.o mempool.o oom_kill.o \
mm_init.o mmu_context.o percpu.o slab_common.o \
- compaction.o balloon_compaction.o vmacache.o \
+ compaction.o vmacache.o \
interval_tree.o list_lru.o workingset.o \
-- iov_iter.o $(mmu-y)
-+ iov_iter.o prfile.o $(mmu-y)
+- 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 900edfa..f4dda0c 100644
+index ad72420..8885258 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
-@@ -2040,7 +2040,7 @@ int filemap_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
+@@ -2064,7 +2064,7 @@ int filemap_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
int ret = VM_FAULT_LOCKED;
sb_start_pagefault(inode->i_sb);
lock_page(page);
if (page->mapping != inode->i_mapping) {
unlock_page(page);
-diff --git a/mm/fremap.c b/mm/fremap.c
-index 72b8fa3..a00bbf0 100644
---- a/mm/fremap.c
-+++ b/mm/fremap.c
-@@ -224,16 +224,28 @@ get_write_lock:
- */
- if (mapping_cap_account_dirty(mapping)) {
- unsigned long addr;
-- struct file *file = get_file(vma->vm_file);
-+ struct file *file = vma->vm_file,
-+ *prfile = vma->vm_prfile;
-+
- /* mmap_region may free vma; grab the info now */
- vm_flags = vma->vm_flags;
-
-+ vma_get_file(vma);
- addr = mmap_region(file, start, size, vm_flags, pgoff);
-- fput(file);
-+ vma_fput(vma);
- if (IS_ERR_VALUE(addr)) {
- err = addr;
- } else {
- BUG_ON(addr != start);
-+ if (prfile) {
-+ struct vm_area_struct *new_vma;
-+
-+ new_vma = find_vma(mm, addr);
-+ if (!new_vma->vm_prfile)
-+ new_vma->vm_prfile = prfile;
-+ if (new_vma != vma)
-+ get_file(prfile);
-+ }
- err = 0;
- }
- goto out_freed;
diff --git a/mm/madvise.c b/mm/madvise.c
-index a402f8f..134e15d 100644
+index d551475..1ebf71b 100644
--- a/mm/madvise.c
+++ b/mm/madvise.c
-@@ -327,12 +327,12 @@ static long madvise_remove(struct vm_area_struct *vma,
+@@ -320,12 +320,12 @@ static long madvise_remove(struct vm_area_struct *vma,
* vma's reference to the file) can go away as soon as we drop
* mmap_sem.
*/
- get_file(f);
+ vma_get_file(vma);
up_read(¤t->mm->mmap_sem);
- error = do_fallocate(f,
+ error = vfs_fallocate(f,
FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE,
offset, end - start);
- fput(f);
return error;
}
diff --git a/mm/memory.c b/mm/memory.c
-index 8b44f76..69a72bf 100644
+index 97839f5..5e5d491 100644
--- a/mm/memory.c
+++ b/mm/memory.c
-@@ -2161,7 +2161,7 @@ reuse:
- set_page_dirty_balance(dirty_page);
- /* file_update_time outside page_lock */
- if (vma->vm_file)
-- file_update_time(vma->vm_file);
-+ vma_file_update_time(vma);
+@@ -2034,7 +2034,7 @@ static inline int wp_page_reuse(struct m
}
- put_page(dirty_page);
- if (page_mkwrite) {
+
+ if (!page_mkwrite)
+- file_update_time(vma->vm_file);
++ vma_file_update_time(vma);
+ }
+
+ return VM_FAULT_WRITE;
diff --git a/mm/mmap.c b/mm/mmap.c
-index 129b847..869d1d7 100644
+index 9ec50a3..4a6a641 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
-@@ -253,7 +253,7 @@ static struct vm_area_struct *remove_vma(struct vm_area_struct *vma)
+@@ -274,7 +274,7 @@ static struct vm_area_struct *remove_vma(struct vm_area_struct *vma)
if (vma->vm_ops && vma->vm_ops->close)
vma->vm_ops->close(vma);
if (vma->vm_file)
mpol_put(vma_policy(vma));
kmem_cache_free(vm_area_cachep, vma);
return next;
-@@ -863,7 +863,7 @@ again: remove_next = 1 + (end > next->vm_end);
+@@ -886,7 +886,7 @@ again: remove_next = 1 + (end > next->vm_end);
if (remove_next) {
if (file) {
uprobe_munmap(next, next->vm_start, next->vm_end);
}
if (next->anon_vma)
anon_vma_merge(vma, next);
-@@ -1643,8 +1643,8 @@ out:
+@@ -1671,8 +1671,8 @@ out:
+ return addr;
+
unmap_and_free_vma:
- if (vm_flags & VM_DENYWRITE)
- allow_write_access(file);
+ vma_fput(vma);
vma->vm_file = NULL;
- fput(file);
/* Undo any partial mapping done by a device driver. */
unmap_region(mm, vma, prev, vma->vm_start, vma->vm_end);
-@@ -2434,7 +2434,7 @@ static int __split_vma(struct mm_struct * mm, struct vm_area_struct * vma,
+@@ -2473,7 +2473,7 @@ static 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);
-@@ -2453,7 +2453,7 @@ static int __split_vma(struct mm_struct * mm, struct vm_area_struct * vma,
+@@ -2492,7 +2492,7 @@ static 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));
-@@ -2842,7 +2842,7 @@ struct vm_area_struct *copy_vma(struct vm_area_struct **vmap,
+@@ -2635,7 +2635,6 @@ 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;
+
+ pr_warn_once("%s (%d) uses deprecated remap_file_pages() syscall. "
+ "See Documentation/vm/remap_file_pages.txt.\n",
+@@ -2679,10 +2678,10 @@ SYSCALL_DEFINE5(remap_file_pages, unsigned long, start, unsigned long, size,
+ munlock_vma_pages_range(vma, start, start + size);
+ }
+
+- file = get_file(vma->vm_file);
++ vma_get_file(vma);
+ ret = do_mmap_pgoff(vma->vm_file, start, size,
+ prot, flags, pgoff, &populate);
+- fput(file);
++ vma_fput(vma);
+ out:
+ up_write(&mm->mmap_sem);
+ if (populate)
+@@ -2950,7 +2949,7 @@ 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/msync.c b/mm/msync.c
-index 992a167..ce1915b 100644
+index bb04d53..5c24c54 100644
--- a/mm/msync.c
+++ b/mm/msync.c
-@@ -84,13 +84,13 @@ SYSCALL_DEFINE3(msync, unsigned long, start, size_t, len, int, flags)
+@@ -84,10 +84,10 @@ SYSCALL_DEFINE3(msync, unsigned long, start, size_t, len, int, flags)
start = vma->vm_end;
if ((flags & MS_SYNC) && file &&
(vma->vm_flags & VM_SHARED)) {
- get_file(file);
+ vma_get_file(vma);
up_read(&mm->mmap_sem);
- if (vma->vm_flags & VM_NONLINEAR)
- error = vfs_fsync(file, 1);
- else
- error = vfs_fsync_range(file, fstart, fend, 1);
+ error = vfs_fsync_range(file, fstart, fend, 1);
- fput(file);
+ vma_fput(vma);
if (error || start >= end)
goto out;
down_read(&mm->mmap_sem);
diff --git a/mm/nommu.c b/mm/nommu.c
-index 4a852f6..b369644 100644
+index 3fba2dc..870ce96 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
-@@ -658,7 +658,7 @@ static void __put_nommu_region(struct vm_region *region)
+@@ -693,7 +693,7 @@ 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 */
-@@ -823,7 +823,7 @@ static void delete_vma(struct mm_struct *mm, struct vm_area_struct *vma)
+@@ -858,7 +858,7 @@ static void delete_vma(struct mm_struct *mm, struct vm_area_struct *vma)
if (vma->vm_ops && vma->vm_ops->close)
vma->vm_ops->close(vma);
if (vma->vm_file)
put_nommu_region(vma->vm_region);
kmem_cache_free(vm_area_cachep, vma);
}
-@@ -1385,7 +1385,7 @@ unsigned long do_mmap_pgoff(struct file *file,
+@@ -1398,7 +1398,7 @@ unsigned long do_mmap_pgoff(struct file *file,
goto error_just_free;
}
}
kmem_cache_free(vm_region_jar, region);
region = pregion;
result = start;
-@@ -1461,10 +1461,10 @@ error_just_free:
+@@ -1474,10 +1474,10 @@ error_just_free:
up_write(&nommu_region_sem);
error:
if (region->vm_file)
return ret;
diff --git a/mm/prfile.c b/mm/prfile.c
new file mode 100644
-index 0000000..fc708d2
+index 0000000..6aa5ab5
--- /dev/null
+++ b/mm/prfile.c
@@ -0,0 +1,86 @@
+#ifdef PRFILE_TRACE
+ if (pr)
+ pr_info("%s:%d: %s, %p\n", func, line, func2,
-+ f ? (char *)f->f_dentry->d_name.name : "(null)");
++ f ? (char *)f->f_path.dentry->d_name.name : "(null)");
+#endif
+}
+
-+#ifdef CONFIG_MMU
+void vma_do_file_update_time(struct vm_area_struct *vma, const char func[],
+ int line)
+{
+ if (f && pr)
+ fput(pr);
+}
-+#else
++
++#ifndef CONFIG_MMU
+struct file *vmr_do_pr_or_file(struct vm_region *region, const char func[],
+ int line)
+{
+ if (f && pr)
+ fput(pr);
+}
-+#endif /* CONFIG_MMU */
-aufs3.16 standalone patch
++#endif /* !CONFIG_MMU */
+aufs3.x-rcN standalone patch
+diff --git a/fs/dcache.c b/fs/dcache.c
+index b93a9f2..5a010ee 100644
+--- a/fs/dcache.c
++++ b/fs/dcache.c
+@@ -1235,6 +1235,7 @@ rename_retry:
+ seq = 1;
+ goto again;
+ }
++EXPORT_SYMBOL(d_walk);
+
+ /*
+ * Search for at least 1 mount point in the dentry's subdirs.
+diff --git a/fs/file_table.c b/fs/file_table.c
+index 3f85411..00e9dcf 100644
+--- a/fs/file_table.c
++++ b/fs/file_table.c
+@@ -147,6 +147,7 @@ over:
+ }
+ return ERR_PTR(-ENFILE);
+ }
++EXPORT_SYMBOL(get_empty_filp);
+
+ /**
+ * alloc_file - allocate and initialize a 'struct file'
+@@ -308,6 +309,7 @@ void put_filp(struct file *file)
+ file_free(file);
+ }
+ }
++EXPORT_SYMBOL(put_filp);
+
+ void __init files_init(unsigned long mempages)
+ {
diff --git a/fs/inode.c b/fs/inode.c
-index b225c0f..73259c8 100644
+index f00b16f..eb7b8b5 100644
--- a/fs/inode.c
+++ b/fs/inode.c
-@@ -57,6 +57,7 @@ static struct hlist_head *inode_hashtable __read_mostly;
+@@ -58,6 +58,7 @@ static struct hlist_head *inode_hashtable __read_mostly;
static __cacheline_aligned_in_smp DEFINE_SPINLOCK(inode_hash_lock);
__cacheline_aligned_in_smp DEFINE_SPINLOCK(inode_sb_list_lock);
/*
* Empty aops. Can be used for the cases where the user does not
-@@ -1512,6 +1513,7 @@ int update_time(struct inode *inode, struct timespec *time, int flags)
- mark_inode_dirty_sync(inode);
- return 0;
- }
-+EXPORT_SYMBOL(update_time);
-
- /**
- * touch_atime - update the access time
diff --git a/fs/namespace.c b/fs/namespace.c
-index 182bc41..c88e101 100644
+index 82ef140..a3aa4b9 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
-@@ -453,6 +453,7 @@ void __mnt_drop_write(struct vfsmount *mnt)
+@@ -463,6 +463,7 @@ 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
-@@ -1564,6 +1565,7 @@ int iterate_mounts(int (*f)(struct vfsmount *, void *), void *arg,
+@@ -1718,6 +1719,7 @@ 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 ad19959..adf290d 100644
+index d16b62c..06ca6bc 100644
--- a/fs/notify/group.c
+++ b/fs/notify/group.c
@@ -22,6 +22,7 @@
int fsnotify_fasync(int fd, struct file *file, int on)
{
diff --git a/fs/notify/mark.c b/fs/notify/mark.c
-index d90deaa..60b4239 100644
+index 92e48c7..d2c4b68 100644
--- a/fs/notify/mark.c
+++ b/fs/notify/mark.c
@@ -109,6 +109,7 @@ void fsnotify_put_mark(struct fsnotify_mark *mark)
}
+EXPORT_SYMBOL(fsnotify_put_mark);
- /*
- * Any time a mark is getting freed we end up here.
-@@ -191,6 +192,7 @@ void fsnotify_destroy_mark(struct fsnotify_mark *mark,
+ /* Calculate mask of events for a list of marks */
+ u32 fsnotify_recalc_mask(struct hlist_head *head)
+@@ -202,6 +203,7 @@ void fsnotify_destroy_mark(struct fsnotify_mark *mark,
fsnotify_destroy_mark_locked(mark, group);
mutex_unlock(&group->mark_mutex);
}
+EXPORT_SYMBOL(fsnotify_destroy_mark);
- void fsnotify_set_mark_mask_locked(struct fsnotify_mark *mark, __u32 mask)
- {
-@@ -275,6 +277,7 @@ err:
+ /*
+ * Destroy all marks in the given list. The marks must be already detached from
+@@ -376,6 +378,7 @@ err:
return ret;
}
int fsnotify_add_mark(struct fsnotify_mark *mark, struct fsnotify_group *group,
struct inode *inode, struct vfsmount *mnt, int allow_dups)
-@@ -336,6 +339,7 @@ void fsnotify_init_mark(struct fsnotify_mark *mark,
+@@ -455,6 +458,7 @@ void fsnotify_init_mark(struct fsnotify_mark *mark,
atomic_set(&mark->refcnt, 1);
mark->free_mark = free_mark;
}
static int fsnotify_mark_destroy(void *ignored)
{
diff --git a/fs/open.c b/fs/open.c
-index d6fd3ac..5e99d8b 100644
+index 33f9cbf..fcc7eb4 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -62,6 +62,7 @@ int do_truncate(struct dentry *dentry, loff_t length, unsigned int time_attrs,
long vfs_truncate(struct path *path, loff_t length)
{
-@@ -298,6 +299,7 @@ int do_fallocate(struct file *file, int mode, loff_t offset, loff_t len)
- sb_end_write(inode->i_sb);
- return ret;
+@@ -672,6 +673,7 @@ int open_check_o_direct(struct file *f)
+ }
+ return 0;
}
-+EXPORT_SYMBOL(do_fallocate);
++EXPORT_SYMBOL(open_check_o_direct);
- SYSCALL_DEFINE4(fallocate, int, fd, int, mode, loff_t, offset, loff_t, len)
- {
+ static int do_dentry_open(struct file *f,
+ int (*open)(struct inode *, struct file *),
diff --git a/fs/splice.c b/fs/splice.c
-index 9ba380c..3419932 100644
+index beb9993..813275a 100644
--- a/fs/splice.c
+++ b/fs/splice.c
-@@ -1127,6 +1127,7 @@ long do_splice_from(struct pipe_inode_info *pipe, struct file *out,
+@@ -1112,6 +1112,7 @@ 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.
-@@ -1153,6 +1154,7 @@ long do_splice_to(struct file *in, loff_t *ppos,
+@@ -1138,6 +1139,7 @@ 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/xattr.c b/fs/xattr.c
+index 4ef6985..6bb6303 100644
+--- a/fs/xattr.c
++++ b/fs/xattr.c
+@@ -207,6 +207,7 @@ vfs_getxattr_alloc(struct dentry *dentry, const char *name, char **xattr_value,
+ *xattr_value = value;
+ return error;
+ }
++EXPORT_SYMBOL(vfs_getxattr_alloc);
+
+ /* Compare an extended attribute value with the given value */
+ int vfs_xattr_cmp(struct dentry *dentry, const char *xattr_name,
diff --git a/security/commoncap.c b/security/commoncap.c
-index b9d613e..ba3b618 100644
+index f66713b..fd4c4b8 100644
--- a/security/commoncap.c
+++ b/security/commoncap.c
-@@ -988,9 +988,11 @@ int cap_mmap_addr(unsigned long addr)
+@@ -975,9 +975,11 @@ int cap_mmap_addr(unsigned long addr)
}
return ret;
}
}
+EXPORT_SYMBOL(cap_mmap_file);
diff --git a/security/device_cgroup.c b/security/device_cgroup.c
-index d9d69e6..3f6f471 100644
+index 188c1d2..426d9af 100644
--- a/security/device_cgroup.c
+++ b/security/device_cgroup.c
@@ -7,6 +7,7 @@
int devcgroup_inode_mknod(int mode, dev_t dev)
{
diff --git a/security/security.c b/security/security.c
-index 31614e9..b223a66 100644
+index e81d5bb..0b7b840 100644
--- a/security/security.c
+++ b/security/security.c
-@@ -407,6 +407,7 @@ int security_path_rmdir(struct path *dir, struct dentry *dentry)
+@@ -430,6 +430,7 @@ int security_path_rmdir(struct path *dir, struct dentry *dentry)
return 0;
return security_ops->path_rmdir(dir, dentry);
}
int security_path_unlink(struct path *dir, struct dentry *dentry)
{
-@@ -423,6 +424,7 @@ int security_path_symlink(struct path *dir, struct dentry *dentry,
+@@ -446,6 +447,7 @@ int security_path_symlink(struct path *dir, struct dentry *dentry,
return 0;
return security_ops->path_symlink(dir, dentry, old_name);
}
int security_path_link(struct dentry *old_dentry, struct path *new_dir,
struct dentry *new_dentry)
-@@ -431,6 +433,7 @@ int security_path_link(struct dentry *old_dentry, struct path *new_dir,
+@@ -454,6 +456,7 @@ int security_path_link(struct dentry *old_dentry, struct path *new_dir,
return 0;
return security_ops->path_link(old_dentry, new_dir, new_dentry);
}
int security_path_rename(struct path *old_dir, struct dentry *old_dentry,
struct path *new_dir, struct dentry *new_dentry,
-@@ -458,6 +461,7 @@ int security_path_truncate(struct path *path)
+@@ -481,6 +484,7 @@ int security_path_truncate(struct path *path)
return 0;
return security_ops->path_truncate(path);
}
int security_path_chmod(struct path *path, umode_t mode)
{
-@@ -465,6 +469,7 @@ int security_path_chmod(struct path *path, umode_t mode)
+@@ -488,6 +492,7 @@ int security_path_chmod(struct path *path, umode_t mode)
return 0;
return security_ops->path_chmod(path, mode);
}
int security_path_chown(struct path *path, kuid_t uid, kgid_t gid)
{
-@@ -472,6 +477,7 @@ int security_path_chown(struct path *path, kuid_t uid, kgid_t gid)
+@@ -495,6 +500,7 @@ int security_path_chown(struct path *path, kuid_t uid, kgid_t gid)
return 0;
return security_ops->path_chown(path, uid, gid);
}
int security_path_chroot(struct path *path)
{
-@@ -557,6 +563,7 @@ int security_inode_readlink(struct dentry *dentry)
+@@ -580,6 +586,7 @@ int security_inode_readlink(struct dentry *dentry)
return 0;
return security_ops->inode_readlink(dentry);
}
int security_inode_follow_link(struct dentry *dentry, struct nameidata *nd)
{
-@@ -571,6 +578,7 @@ int security_inode_permission(struct inode *inode, int mask)
+@@ -594,6 +601,7 @@ int security_inode_permission(struct inode *inode, int mask)
return 0;
return security_ops->inode_permission(inode, mask);
}
int security_inode_setattr(struct dentry *dentry, struct iattr *attr)
{
-@@ -693,6 +701,7 @@ int security_file_permission(struct file *file, int mask)
+@@ -716,6 +724,7 @@ int security_file_permission(struct file *file, int mask)
return fsnotify_perm(file, mask);
}
int security_file_alloc(struct file *file)
{
-@@ -753,6 +762,7 @@ int security_mmap_file(struct file *file, unsigned long prot,
+@@ -775,6 +784,7 @@ int security_mmap_file(struct file *file, unsigned long prot,
return ret;
return ima_file_mmap(file, prot);
}
+ will be empty. About XINO files, see the aufs manual.
diff -urN /usr/share/empty/Documentation/filesystems/aufs/design/01intro.txt linux/Documentation/filesystems/aufs/design/01intro.txt
--- /usr/share/empty/Documentation/filesystems/aufs/design/01intro.txt 1970-01-01 01:00:00.000000000 +0100
-+++ linux/Documentation/filesystems/aufs/design/01intro.txt 2014-01-30 21:10:02.807480310 +0100
-@@ -0,0 +1,161 @@
++++ linux/Documentation/filesystems/aufs/design/01intro.txt 2015-06-22 08:27:37.867501461 +0200
+@@ -0,0 +1,170 @@
+
-+# Copyright (C) 2005-2014 Junjiro R. Okajima
++# Copyright (C) 2005-2015 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
+- multi layered stackable unification filesystem, the member directory
+ is called as a branch.
+- branch permission and attribute, 'readonly', 'real-readonly',
-+ 'readwrite', 'whiteout-able', 'link-able whiteout' and their
++ 'readwrite', 'whiteout-able', 'link-able whiteout', etc. and their
+ combination.
+- internal "file copy-on-write".
+- logical deletion, whiteout.
+- unnecessary copy-up may happen, for example mmap(MAP_PRIVATE) after
+ open(O_RDWR).
+
-+Unionfs has a longer history. When I started implementing a stacking filesystem
-+(Aug 2005), it already existed. It has virtual super_block, inode,
-+dentry and file objects and they have an array pointing lower same kind
-+objects. After contributing many patches for Unionfs, I re-started my
-+project AUFS (Jun 2006).
++In linux-3.18, "overlay" filesystem (formerly known as "overlayfs") was
++merged into mainline. This is another implementation of UnionMount as a
++separated filesystem. All the limitations and known problems which
++UnionMount are equally inherited to "overlay" filesystem.
++
++Unionfs has a longer history. When I started implementing a stackable
++filesystem (Aug 2005), it already existed. It has virtual super_block,
++inode, dentry and file objects and they have an array pointing lower
++same kind objects. After contributing many patches for Unionfs, I
++re-started my project AUFS (Jun 2006).
+
+In AUFS, the structure of filesystem resembles to Unionfs, but I
+implemented my own ideas, approaches and enhancements and it became
+- DM snapshot-merge may help a lot when users try merging. in the
+ fs-layer union, users will use rsync(1).
+
++You may want to read my old paper "Filesystems in LiveCD"
++(http://aufs.sourceforge.net/aufs2/report/sq/sq.pdf).
++
+
-+Several characters/aspects of aufs
++Several characters/aspects/persona of aufs
+----------------------------------------------------------------------
+
-+Aufs has several characters or aspects.
++Aufs has several characters, aspects or persona.
+1. a filesystem, callee of VFS helper
+2. sub-VFS, caller of VFS helper for branches
+3. a virtual filesystem which maintains persistent inode number
+numbers. This is particularly important to support exporting a
+filesystem via NFS. Aufs is a virtual filesystem which doesn't have a
+backend block device for its own. But some storage is necessary to
-+maintain inode number. It may be a large space and may not suit to keep
-+in memory. Aufs rents some space from its first writable branch
-+filesystem (by default) and creates file(s) on it. These files are
-+created by aufs internally and removed soon (currently) keeping opened.
++keep and maintain the inode numbers. It may be a large space and may not
++suit to keep in memory. Aufs rents some space from its first writable
++branch filesystem (by default) and creates file(s) on it. These files
++are created by aufs internally and removed soon (currently) keeping
++opened.
+Note: Because these files are removed, they are totally gone after
+ unmounting aufs. It means the inode numbers are not persistent
+ across unmount or reboot. I have a plan to make them really
+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 2014-08-14 10:15:45.115275734 +0200
-@@ -0,0 +1,251 @@
++++ linux/Documentation/filesystems/aufs/design/02struct.txt 2015-06-22 08:27:37.867501461 +0200
+@@ -0,0 +1,258 @@
+
-+# Copyright (C) 2005-2014 Junjiro R. Okajima
++# Copyright (C) 2005-2015 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
+
+Aufs lookup operation finds /ro/fileA and gets dentry for that. These
+pointers are stored in a aufs dentry. The array in aufs dentry will be,
-+- [0] = NULL
++- [0] = NULL (because /rw/fileA doesn't exist)
+- [1] = /ro/fileA
+
+This style of an array is essentially same to the aufs
+superblock/inode/dentry/file objects.
+
+Because aufs supports manipulating branches, ie. add/delete/change
-+dynamically, these objects has its own generation. When branches are
-+changed, the generation in aufs superblock is incremented. And a
-+generation in other object are compared when it is accessed.
-+When a generation in other objects are obsoleted, aufs refreshes the
-+internal array.
++branches dynamically, these objects has its own generation. When
++branches are changed, the generation in aufs superblock is
++incremented. And a generation in other object are compared when it is
++accessed. When a generation in other objects are obsoleted, aufs
++refreshes the internal array.
+
+
+Superblock
+Additionally aufs superblock has some data for policies to select one
+among multiple writable branches, XIB files, pseudo-links and kobject.
+See below in detail.
-+About the policies which supports copy-down a directory, see policy.txt
-+too.
++About the policies which supports copy-down a directory, see
++wbr_policy.txt too.
+
+
+Branch and XINO(External Inode Number Translation Table)
+might appear. If your branch filesystem consumes disk space for such
+holes, then you should specify 'xino=' option at mounting aufs.
+
++Aufs has a mount option to free the disk blocks for such holes in XINO
++files on tmpfs or ramdisk. But it is not so effective actually. If you
++meet a problem of disk shortage due to XINO files, then you should try
++"tmpfs-ino.patch" (and "vfs-ino.patch" too) in aufs4-standalone.git.
++The patch localizes the assignment inumbers per tmpfs-mount and avoid
++the holes in XINO files.
++
+Also a writable branch has three kinds of "whiteout bases". All these
-+are existed when the branch is joined to aufs and the names are
++are existed when the branch is joined to aufs, and their names are
+whiteout-ed doubly, so that users will never see their names in aufs
+hierarchy.
-+1. a regular file which will be linked to all whiteouts.
++1. a regular file which will be hardlinked to all whiteouts.
+2. a directory to store a pseudo-link.
-+3. a directory to store an "orphan-ed" file temporary.
++3. a directory to store an "orphan"-ed file temporary.
+
+1. Whiteout Base
+ When you remove a file on a readonly branch, aufs handles it as a
+ creating a file under this dir, the file is unlinked.
+
+Because aufs supports manipulating branches, ie. add/delete/change
-+dynamically, a branch has its own id. When the branch order changes, aufs
-+finds the new index by searching the branch id.
++dynamically, a branch has its own id. When the branch order changes,
++aufs finds the new index by searching the branch id.
+
+
+Pseudo-link
+simple list. If fileB is read after unlinking fileA, aufs returns
+filedata from the pseudo-link instead of the lower readonly
+branch. Because the pseudo-link is based upon the inode, to keep the
-+inode number by xino (see above) is important.
++inode number by xino (see above) is essentially necessary.
+
+All the hardlinks under the Pseudo-link Directory of the writable branch
+should be restored in a proper location later. Aufs provides a utility
+XIB(external inode number bitmap)
+----------------------------------------------------------------------
+Addition to the xino file per a branch, aufs has an external inode number
-+bitmap in a superblock object. It is also a file such like a xino file.
++bitmap in a superblock object. It is also an internal file such like a
++xino file.
+It is a simple bitmap to mark whether the aufs inode number is in-use or
+not.
+To reduce the file I/O, aufs prepares a single memory page to cache xib.
+
-+Aufs implements a feature to truncate/refresh both of xino and xib to
++As well as XINO files, aufs has a feature to truncate/refresh XIB to
+reduce the number of consumed disk blocks for these files.
+
+
+with eliminating the whiteout-ed ones, and sets it to file (dir)
+object. So the file object has its entry list until it is closed. The
+entry list will be updated when the file position is zero and becomes
-+old. This decision is made in aufs automatically.
++obsoleted. This decision is made in aufs automatically.
+
+The dynamically allocated memory block for the name of entries has a
+unit of 512 bytes (by default) and stores the names contiguously (no
+its completion. This approach solves a problem of a signal handler
+simply.
+If aufs didn't adopt the workqueue and changed the privilege of the
-+process, and if the mkdir/write call arises SIGXFSZ or other signal,
-+then the user process might gain a privilege or the generated core file
-+was owned by a superuser.
++process, then the process may receive the unexpected SIGXFSZ or other
++signals.
+
+Also aufs uses the system global workqueue ("events" kernel thread) too
+for asynchronous tasks, such like handling inotify/fsnotify, re-creating a
+
+Basically the whiteout represents "logical deletion" which stops aufs to
+lookup further, but also it represents "dir is opaque" which also stop
-+lookup.
++further lookup.
+
+In aufs, rmdir(2) and rename(2) for dir uses whiteout alternatively.
+In order to make several functions in a single systemcall to be
+unique whiteouted name.
+For example, in rename(2) dir where the target dir already existed, aufs
+renames the target dir to a temporary unique whiteouted name before the
-+actual rename on a branch and then handles other actions (make it opaque,
++actual rename on a branch, and then handles other actions (make it opaque,
+update the attributes, etc). If an error happens in these actions, aufs
+simply renames the whiteouted name back and returns an error. If all are
+succeeded, aufs registers a function to remove the whiteouted unique
+- diropq for the ancestor directories may exist on the upper branch.
+- free space on the lower branch will reduce.
+- another access to the file may happen during moving-down, including
-+ UDBA.
++ UDBA (see "Revalidate Dentry and UDBA").
+- the file should not be hard-linked nor pseudo-linked. they should be
+ handled by auplink utility later.
+
+- etc.
+
+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 2015-06-22 08:27:37.870834875 +0200
+@@ -0,0 +1,85 @@
++
++# Copyright (C) 2015 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/>.
++
++Support for a branch who has its ->atomic_open()
++----------------------------------------------------------------------
++The filesystems who implement its ->atomic_open() are not majority. For
++example NFSv4 does, and aufs should call NFSv4 ->atomic_open,
++particularly for open(O_CREAT|O_EXCL, 0400) case. Other than
++->atomic_open(), NFSv4 returns an error for this open(2). While I am not
++sure whether all filesystems who have ->atomic_open() behave like this,
++but NFSv4 surely returns the error.
++
++In order to support ->atomic_open() for aufs, there are a few
++approaches.
++
++A. Introduce aufs_atomic_open()
++ - calls one of VFS:do_last(), lookup_open() or atomic_open() for
++ branch fs.
++B. Introduce aufs_atomic_open() calling create, open and chmod. this is
++ an aufs user Pip Cet's approach
++ - calls aufs_create(), VFS finish_open() and notify_change().
++ - pass fake-mode to finish_open(), and then correct the mode by
++ notify_change().
++C. Extend aufs_open() to call branch fs's ->atomic_open()
++ - no aufs_atomic_open().
++ - aufs_lookup() registers the TID to an aufs internal object.
++ - aufs_create() does nothing when the matching TID is registered, but
++ registers the mode.
++ - aufs_open() calls branch fs's ->atomic_open() when the matching
++ TID is registered.
++D. Extend aufs_open() to re-try branch fs's ->open() with superuser's
++ credential
++ - no aufs_atomic_open().
++ - aufs_create() registers the TID to an internal object. this info
++ represents "this process created this file just now."
++ - when aufs gets EACCES from branch fs's ->open(), then confirm the
++ registered TID and re-try open() with superuser's credential.
++
++Pros and cons for each approach.
++
++A.
++ - straightforward but highly depends upon VFS internal.
++ - the atomic behavaiour is kept.
++ - some of parameters such as nameidata are hard to reproduce for
++ branch fs.
++ - large overhead.
++B.
++ - easy to implement.
++ - the atomic behavaiour is lost.
++C.
++ - the atomic behavaiour is kept.
++ - dirty and tricky.
++ - VFS checks whether the file is created correctly after calling
++ ->create(), which means this approach doesn't work.
++D.
++ - easy to implement.
++ - the atomic behavaiour is lost.
++ - to open a file with superuser's credential and give it to a user
++ process is a bad idea, since the file object keeps the credential
++ in it. It may affect LSM or something. This approach doesn't work
++ either.
++
++The approach A is ideal, but it hard to implement. So here is a
++variation of A, which is to be implemented.
++
++A-1. Introduce aufs_atomic_open()
++ - calls branch fs ->atomic_open() if exists. otherwise calls
++ vfs_create() and finish_open().
++ - the demerit is that the several checks after branch fs
++ ->atomic_open() are lost. in the ordinary case, the checks are
++ done by VFS:do_last(), lookup_open() and atomic_open(). some can
++ 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 2014-08-14 10:15:45.118609182 +0200
-@@ -0,0 +1,133 @@
++++ linux/Documentation/filesystems/aufs/design/03lookup.txt 2015-06-22 08:27:37.870834875 +0200
+@@ -0,0 +1,113 @@
+
-+# Copyright (C) 2005-2014 Junjiro R. Okajima
++# Copyright (C) 2005-2015 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 in a Branch
+----------------------------------------------------------------------
+Since aufs has a character of sub-VFS (see Introduction), it operates
-+lookup for branches as VFS does. It may be a heavy work. Generally
-+speaking struct nameidata is a bigger structure and includes many
-+information. But almost all lookup operation in aufs is the simplest
-+case, ie. lookup only an entry directly connected to its parent. Digging
-+down the directory hierarchy is unnecessary.
-+
-+VFS has a function lookup_one_len() for that use, but it is not usable
-+for a branch filesystem which requires struct nameidata. So aufs
-+implements a simple lookup wrapper function. When a branch filesystem
-+allows NULL as nameidata, it calls lookup_one_len(). Otherwise it builds
-+a simplest nameidata and calls lookup_hash().
-+Here aufs applies "a principle in NFSD", ie. if the filesystem supports
-+NFS-export, then it has to support NULL as a nameidata parameter for
-+->create(), ->lookup() and ->d_revalidate(). So the lookup wrapper in
-+aufs tests if ->s_export_op in the branch is NULL or not.
-+
-+When a branch is a remote filesystem, aufs basically trusts its
++lookup for branches as VFS does. It may be a heavy work. But almost all
++lookup operation in aufs is the simplest case, ie. lookup only an entry
++directly connected to its parent. Digging down the directory hierarchy
++is unnecessary. VFS has a function lookup_one_len() for that use, and
++aufs calls it.
++
++When a branch is a remote filesystem, aufs basically relies upon its
+->d_revalidate(), also aufs forces the hardest revalidate tests for
+them.
+For d_revalidate, aufs implements three levels of revalidate tests. See
+- "dirA" exists under /ro, but /rw. and its mode is 0700.
+- user invoked "chmod a+rx /au/dirA"
+- the internal copy-up is activated and "/rw/dirA" is created and its
-+ permission bits are set to world readble.
++ permission bits are set to world readable.
+- then "/au/dirA" becomes world readable?
+
+In this case, /ro/dirA is still 0700 since it exists in readonly branch,
+allowed it by chmod. Should really aufs rejects showing the entries
+under /ro/dirA?
+
-+To be honest, I don't have a best solution for this case. So aufs
-+implements 'dirperm1' and 'nodirperm1' and leave it to users.
++To be honest, I don't have a good solution for this case. So aufs
++implements 'dirperm1' and 'nodirperm1' mount options, and leave it to
++users.
+When dirperm1 is specified, aufs checks only the highest one for the
+directory permission, and shows the entries. Otherwise, as usual, checks
+every dir existing on all branches and rejects the request.
+branch is many.
+
+
-+Loopback Mount
-+----------------------------------------------------------------------
-+Basically aufs supports any type of filesystem and block device for a
-+branch (actually there are some exceptions). But it is prohibited to add
-+a loopback mounted one whose backend file exists in a filesystem which is
-+already added to aufs. The reason is to protect aufs from a recursive
-+lookup. If it was allowed, the aufs lookup operation might re-enter a
-+lookup for the loopback mounted branch in the same context, and will
-+cause a deadlock.
-+
-+
+Revalidate Dentry and UDBA (User's Direct Branch Access)
+----------------------------------------------------------------------
+Generally VFS helpers re-validate a dentry as a part of lookup.
+ itself.
+3. No Extra Validation
+ This is the simplest test and doesn't add any additional revalidation
-+ test, and skip therevalidatin in step 4. It is useful and improves
++ test, and skip the revalidation in step 4. It is useful and improves
+ aufs performance when system surely hide the aufs branches from user,
+ 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 2014-01-30 21:10:02.807480310 +0100
-@@ -0,0 +1,75 @@
++++ linux/Documentation/filesystems/aufs/design/04branch.txt 2015-06-22 08:27:37.870834875 +0200
+@@ -0,0 +1,74 @@
+
-+# Copyright (C) 2005-2014 Junjiro R. Okajima
++# Copyright (C) 2005-2015 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
+Add a Branch
+----------------------------------------------------------------------
+o Confirm the adding dir exists outside of aufs, including loopback
-+ mount.
-+- and other various attributes...
++ mount, and its various attributes.
+o Initialize the xino file and whiteout bases if necessary.
+ See struct.txt.
+
+ writable branch, and the writable branch is world-writable, then a
+ malicious guy may create /etc/passwd on the writable branch directly
+ and the infected file will be valid in aufs.
-+ I am afraid it can be a security issue, but nothing to do except
++ I am afraid it can be a security issue, but aufs can do nothing except
+ producing a warning.
+
+
+ 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 2014-01-30 21:10:02.807480310 +0100
++++ linux/Documentation/filesystems/aufs/design/05wbr_policy.txt 2015-06-22 08:27:37.870834875 +0200
@@ -0,0 +1,64 @@
+
-+# Copyright (C) 2005-2014 Junjiro R. Okajima
++# Copyright (C) 2005-2015 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
+writable branch which has the parent (or ancestor) dir of the target
+file is chosen (top-down-parent policy).
+By user's request, aufs implements some other policies to select the
-+writable branch, for file creation two policies, round-robin and
-+most-free-space policies. For copy-up three policies, top-down-parent,
-+bottom-up-parent and bottom-up policies.
++writable branch, for file creation several policies, round-robin,
++most-free-space, and other policies. For copy-up, top-down-parent,
++bottom-up-parent, bottom-up and others.
+
+As expected, the round-robin policy selects the branch in circular. When
+you have two writable branches and creates 10 new files, 5 files will be
+ copyup policy.
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 2014-08-14 10:15:45.118609182 +0200
++++ linux/Documentation/filesystems/aufs/design/06fhsm.txt 2015-06-22 08:27:37.870834875 +0200
@@ -0,0 +1,120 @@
+
-+# Copyright (C) 2011-2014 Junjiro R. Okajima
++# Copyright (C) 2011-2015 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
+----------------------------------------------------------------------
+Hierarchical Storage Management (or HSM) is a well-known feature in the
+storage world. Aufs provides this feature as file-based with multiple
-+writable branches, based upon the principle of "Colder-Lower".
++writable branches, based upon the principle of "Colder, the Lower".
+Here the word "colder" means that the less used files, and "lower" means
-+that the position in the order of the stacked branches.
++that the position in the order of the stacked branches vertically.
+These multiple writable branches are prioritized, ie. the topmost one
+should be the fastest drive and be used heavily.
+
+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 2014-01-30 21:10:02.807480310 +0100
-@@ -0,0 +1,46 @@
++++ linux/Documentation/filesystems/aufs/design/06mmap.txt 2015-06-22 08:27:37.870834875 +0200
+@@ -0,0 +1,72 @@
+
-+# Copyright (C) 2005-2014 Junjiro R. Okajima
++# Copyright (C) 2005-2015 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
+interaction with aufs. It means aufs_mmap() calls the branch fs's
+->mmap().
+This approach is simple and good, but there is one problem.
-+Under /proc, several entries show the mmap-ped files by its path (with
++Under /proc, several entries show the mmapped files by its path (with
+device and inode number), and the printed path will be the path on the
+branch fs's instead of virtual aufs's.
+This is not a problem in most cases, but some utilities lsof(1) (and its
+ incremented.
+- merging vma maintains the ref count too.
+
-+This is not a good approach. It just faking the printed path. But it
++This is not a good approach. It just fakes the printed path. But it
+leaves all behaviour around f_mapping unchanged. This is surely an
+advantage.
+Actually aufs had adopted another complicated approach which calls
+generic_file_mmap() and handles struct vm_operations_struct. In this
+approach, aufs met a hard problem and I could not solve it without
+switching the approach.
++
++There may be one more another approach which is
++- bind-mount the branch-root onto the aufs-root internally
++- grab the new vfsmount (ie. struct mount)
++- lazy-umount the branch-root internally
++- in open(2) the aufs-file, open the branch-file with the hidden
++ vfsmount (instead of the original branch's vfsmount)
++- ideally this "bind-mount and lazy-umount" should be done atomically,
++ but it may be possible from userspace by the mount helper.
++
++Adding the internal hidden vfsmount and using it in opening a file, the
++file path under /proc will be printed correctly. This approach looks
++smarter, but is not possible I am afraid.
++- aufs-root may be bind-mount later. when it happens, another hidden
++ vfsmount will be required.
++- it is hard to get the chance to bind-mount and lazy-umount
++ + in kernel-space, FS can have vfsmount in open(2) via
++ file->f_path, and aufs can know its vfsmount. But several locks are
++ already acquired, and if aufs tries to bind-mount and lazy-umount
++ here, then it may cause a deadlock.
++ + in user-space, bind-mount doesn't invoke the mount helper.
++- since /proc shows dev and ino, aufs has to give vma these info. it
++ means a new member vm_prinode will be necessary. this is essentially
++ equivalent to vm_prfile described above.
++
++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 2015-06-22 08:27:37.870834875 +0200
+@@ -0,0 +1,96 @@
++
++# Copyright (C) 2014-2015 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, write to the Free Software
++# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
++
++
++Listing XATTR/EA and getting the value
++----------------------------------------------------------------------
++For the inode standard attributes (owner, group, timestamps, etc.), aufs
++shows the values from the topmost existing file. This behaviour is good
++for the non-dir entries since the bahaviour exactly matches the shown
++information. But for the directories, aufs considers all the same named
++entries on the lower branches. Which means, if one of the lower entry
++rejects readdir call, then aufs returns an error even if the topmost
++entry allows it. This behaviour is necessary to respect the branch fs's
++security, but can make users confused since the user-visible standard
++attributes don't match the behaviour.
++To address this issue, aufs has a mount option called dirperm1 which
++checks the permission for the topmost entry only, and ignores the lower
++entry's permission.
++
++A similar issue can happen around XATTR.
++getxattr(2) and listxattr(2) families behave as if dirperm1 option is
++always set. Otherwise these very unpleasant situation would happen.
++- listxattr(2) may return the duplicated entries.
++- users may not be able to remove or reset the XATTR forever,
++
++
++XATTR/EA support in the internal (copy,move)-(up,down)
++----------------------------------------------------------------------
++Generally the extended attributes of inode are categorized as these.
++- "security" for LSM and capability.
++- "system" for posix ACL, 'acl' mount option is required for the branch
++ fs generally.
++- "trusted" for userspace, CAP_SYS_ADMIN is required.
++- "user" for userspace, 'user_xattr' mount option is required for the
++ branch fs generally.
++
++Moreover there are some other categories. Aufs handles these rather
++unpopular categories as the ordinary ones, ie. there is no special
++condition nor exception.
++
++In copy-up, the support for XATTR on the dst branch may differ from the
++src branch. In this case, the copy-up operation will get an error and
++the original user operation which triggered the copy-up will fail. It
++can happen that even all copy-up will fail.
++When both of src and dst branches support XATTR and if an error occurs
++during copying XATTR, then the copy-up should fail obviously. That is a
++good reason and aufs should return an error to userspace. But when only
++the src branch support that XATTR, aufs should not return an error.
++For example, the src branch supports ACL but the dst branch doesn't
++because the dst branch may natively un-support it or temporary
++un-support it due to "noacl" mount option. Of course, the dst branch fs
++may NOT return an error even if the XATTR is not supported. It is
++totally up to the branch fs.
++
++Anyway when the aufs internal copy-up gets an error from the dst branch
++fs, then aufs tries removing the just copied entry and returns the error
++to the userspace. The worst case of this situation will be all copy-up
++will fail.
++
++For the copy-up operation, there two basic approaches.
++- copy the specified XATTR only (by category above), and return the
++ error unconditionally if it happens.
++- copy all XATTR, and ignore the error on the specified category only.
++
++In order to support XATTR and to implement the correct behaviour, aufs
++chooses the latter approach and introduces some new branch attributes,
++"icexsec", "icexsys", "icextr", "icexusr", and "icexoth".
++They correspond to the XATTR namespaces (see above). Additionally, to be
++convenient, "icex" is also provided which means all "icex*" attributes
++are set (here the word "icex" stands for "ignore copy-error on XATTR").
++
++The meaning of these attributes is to ignore the error from setting
++XATTR on that branch.
++Note that aufs tries copying all XATTR unconditionally, and ignores the
++error from the dst branch according to the specified attributes.
++
++Some XATTR may have its default value. The default value may come from
++the parent dir or the environment. If the default value is set at the
++file creating-time, it will be overwritten by copy-up.
++Some contradiction may happen I am afraid.
++Do we need another attribute to stop copying XATTR? I am unsure. For
++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 2014-01-30 21:10:02.807480310 +0100
++++ linux/Documentation/filesystems/aufs/design/07export.txt 2015-06-22 08:27:37.870834875 +0200
@@ -0,0 +1,58 @@
+
-+# Copyright (C) 2005-2014 Junjiro R. Okajima
++# Copyright (C) 2005-2015 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
+ + find the index of a branch from its id in handle, and check it is
+ still exist in aufs.
+ + 1st level: get the inode number from handle and search it in cache.
-+ + 2nd level: if not found, get the parent inode number from handle and
-+ search it in cache. and then open the parent dir, find the matching
-+ inode number by vfs_readdir() and get its name, and call
-+ lookup_one_len() for the target dentry.
++ + 2nd level: if not found in cache, get the parent inode number from
++ the handle and search it in cache. and then open the found parent
++ dir, find the matching inode number by vfs_readdir() and get its
++ name, and call lookup_one_len() for the target dentry.
+ + 3rd level: if the parent dir is not cached, call
+ exportfs_decode_fh() for a branch and get the parent on a branch,
+ build a pathname of it, convert it a pathname in aufs, call
+ 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 2014-01-30 21:10:02.807480310 +0100
++++ linux/Documentation/filesystems/aufs/design/08shwh.txt 2015-06-22 08:27:37.870834875 +0200
@@ -0,0 +1,52 @@
+
-+# Copyright (C) 2005-2014 Junjiro R. Okajima
++# Copyright (C) 2005-2015 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 2014-01-30 21:10:02.807480310 +0100
-@@ -0,0 +1,46 @@
++++ linux/Documentation/filesystems/aufs/design/10dynop.txt 2015-06-22 08:27:37.870834875 +0200
+@@ -0,0 +1,47 @@
+
-+# Copyright (C) 2010-2014 Junjiro R. Okajima
++# Copyright (C) 2010-2015 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
+operation. Some FS have multiple sets of them. For instance, ext2 has
+three sets, one for XIP, for NOBH, and for normal.
+Since aufs overrides and redirects these operations, sometimes aufs has
-+to change its behaviour according to the branch FS type. More imporantly
++to change its behaviour according to the branch FS type. More importantly
+VFS acts differently if a function (member in the struct) is set or
+not. It means aufs should have several sets of operations and select one
+among them according to the branch FS definition.
+
-+In order to solve this problem and not to affect the behavour of VFS,
++In order to solve this problem and not to affect the behaviour of VFS,
+aufs defines these operations dynamically. For instance, aufs defines
-+aio_read function for struct file_operations, but it may not be set to
-+the file_operations. When the branch FS doesn't have it, aufs doesn't
-+set it to its file_operations while the function definition itself is
-+still alive. So the behaviour of io_submit(2) will not change, and it
-+will return an error when aio_read is not defined.
++dummy direct_IO function for struct address_space_operations, but it may
++not be set to the address_space_operations actually. When the branch FS
++doesn't have it, aufs doesn't set it to its address_space_operations
++while the function definition itself is still alive. So the behaviour
++itself will not change, and it will return an error when direct_IO is
++not set.
+
+The lifetime of these dynamically generated operation object is
+maintained by aufs branch object. When the branch is removed from aufs,
+the reference counter of the object is decremented. When it reaches
+zero, the dynamically generated operation object will be freed.
+
-+This approach is designed to support AIO (io_submit), Direcit I/O and
-+XIP mainly.
-+Currently this approach is applied to file_operations and
-+vm_operations_struct for regular files only.
++This approach is designed to support AIO (io_submit), Direct I/O and
++XIP (DAX) mainly.
++Currently this approach is applied to address_space_operations for
++regular files only.
diff -urN /usr/share/empty/Documentation/filesystems/aufs/design/99plan.txt linux/Documentation/filesystems/aufs/design/99plan.txt
--- /usr/share/empty/Documentation/filesystems/aufs/design/99plan.txt 1970-01-01 01:00:00.000000000 +0100
-+++ linux/Documentation/filesystems/aufs/design/99plan.txt 2014-08-14 10:15:45.118609182 +0200
-@@ -0,0 +1,58 @@
++++ linux/Documentation/filesystems/aufs/design/99plan.txt 2015-06-22 08:27:37.870834875 +0200
+@@ -0,0 +1,57 @@
+
-+# Copyright (C) 2005-2014 Junjiro R. Okajima
++# Copyright (C) 2005-2015 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
+----------------------------------------------------------------------
+Aufs1 allows aufs to be another aufs's readonly branch.
+This feature was developed by a user's request. But it may not be used
-+currecnly.
++currently.
+
+
+Refresh the Opened File (refrof)
+- user opened "/au/fileA".
+- he or someone else inserts a branch (/new) between /rw and /ro.
+ /au = /rw + /new + /ro
-+- the new branch has "fileA".
++- the new branch contains "fileA".
+- user reads from the opened "fileA"
+- which filedata should aufs return, from /ro or /new?
+
+Here again I don't have a best and final answer. I got an idea to
+implement 'refrof' and 'norefrof' option. When 'refrof' (REFResh the
+Opened File) is specified (by default), aufs returns the filedata from
-+/new.
-+Otherwise from /new.
++/new. Otherwise from /ro.
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 2014-08-14 10:15:45.115275734 +0200
-@@ -0,0 +1,370 @@
++++ linux/Documentation/filesystems/aufs/README 2015-06-22 08:27:37.867501461 +0200
+@@ -0,0 +1,384 @@
+
+Aufs3 -- advanced multi layered unification filesystem version 3.x
+http://aufs.sf.net
+0. Introduction
+----------------------------------------
+In the early days, aufs was entirely re-designed and re-implemented
-+Unionfs Version 1.x series. After many original ideas, approaches,
++Unionfs Version 1.x series. Adding many original ideas, approaches,
+improvements and implementations, it becomes totally different from
+Unionfs while keeping the basic features.
+Recently, Unionfs Version 2.x series begin taking some of the same
+- dynamic branch manipulation, add, del.
+- etc...
+
-+Also there are many enhancements in aufs1, such as:
++Also there are many enhancements in aufs, such as:
++- test only the highest one for the directory permission (dirperm1)
++- copyup on open (coo=)
++- 'move' policy for copy-up between two writable branches, after
++ checking free space.
++- xattr, acl
+- readdir(3) in userspace.
+- keep inode number by external inode number table
+- keep the timestamps of file/dir in internal copyup operation
+
+Currently these features are dropped temporary from aufs3.
+See design/08plan.txt in detail.
-+- test only the highest one for the directory permission (dirperm1)
-+- copyup on open (coo=)
+- nested mount, i.e. aufs as readonly no-whiteout branch of another aufs
+ (robr)
+- statistics of aufs thread (/sys/fs/aufs/stat)
-+- delegation mode (dlgt)
-+ a delegation of the internal branch access to support task I/O
-+ accounting, which also supports Linux Security Modules (LSM) mainly
-+ for Suse AppArmor.
-+- intent.open/create (file open in a single lookup)
+
+Features or just an idea in the future (see also design/*.txt),
+- reorder the branch index without del/re-add.
+- permanent xino files for NFSD
+- an option for refreshing the opened files after add/del branches
-+- 'move' policy for copy-up between two writable branches, after
-+ checking free space.
+- light version, without branch manipulation. (unnecessary?)
+- copyup in userspace
+- inotify in userspace
+- readv/writev
-+- xattr, acl
+
+
+2. Download
+git://git.kernel.org/.../torvalds/linux.git.
+And you cannot select CONFIG_AUFS_FS=m for this version, eg. you cannot
+build aufs3 as an external kernel module.
++Several extra patches are not included in this tree. Only
++aufs3-standalong tree contains them. They are describe in the later
++section "Configuration and Compilation."
+
+On the other hand, the aufs3-standalone tree has only aufs source files
+and necessary patches, and you can select CONFIG_AUFS_FS=m.
++But you need to apply all aufs patches manually.
+
+You will find GIT branches whose name is in form of "aufs3.x" where "x"
+represents the linux kernel version, "linux-3.x". For instance,
+
+o aufs3-linux tree
+$ git clone --reference /your/linux/git/tree \
-+ git://git.code.sf.net/p/aufs/aufs3-linux aufs-aufs3-linux \
-+ aufs3-linux.git
++ git://git.code.sf.net/p/aufs/aufs3-linux aufs3-linux.git
+- if you don't have linux GIT tree, then remove "--reference ..."
+$ cd aufs3-linux.git
+$ git checkout origin/aufs3.0
+
++Or You may want to directly git-pull aufs into your linux GIT tree, and
++leave the patch-work to GIT.
++$ cd /your/linux/git/tree
++$ git remote add aufs3 https://github.com/sfjro/aufs3-linux.git
++- aufs3-linux.git tree also exists on github.
++$ git fetch aufs3
++$ git checkout -b my3.14 v3.14
++$ (add your change...)
++$ git pull aufs3 aufs3.14
++- now you have v3.14 + your_changes + aufs3.14 in you my3.14 branch.
++- you may need to solve some conflicts between your_changes and
++ aufs3.14. in this case, git-rerere is recommended so that you can
++ solve the similar confilicts automatically when you upgrade to 3.15 or
++ later in the future.
++
+o aufs3-standalone tree
+$ git clone git://git.code.sf.net/p/aufs/aufs3-standalone \
+ aufs3-standalone.git
+Nikolay Pertsev made a donation (2014/5).
+James B made a donation (2014/7).
+Stefano Di Biase made a donation (2014/8).
++Daniel Epellei made a donation (2015/1).
+
+Thank you very much.
+Donations are always, including future donations, very important and
+# End: ;
diff -urN /usr/share/empty/fs/aufs/aufs.h linux/fs/aufs/aufs.h
--- /usr/share/empty/fs/aufs/aufs.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/aufs.h 2014-01-30 21:10:02.827480967 +0100
++++ linux/fs/aufs/aufs.h 2015-06-22 08:27:37.874168290 +0200
@@ -0,0 +1,59 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+#endif /* __AUFS_H__ */
diff -urN /usr/share/empty/fs/aufs/branch.c linux/fs/aufs/branch.c
--- /usr/share/empty/fs/aufs/branch.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/branch.c 2014-08-14 10:16:04.512608923 +0200
-@@ -0,0 +1,1447 @@
++++ linux/fs/aufs/branch.c 2015-06-22 08:29:23.703424266 +0200
+@@ -0,0 +1,1406 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+/*
+ * free a single branch
+ */
-+
-+/* prohibit rmdir to the root of the branch */
-+/* todo: another new flag? */
-+static void au_br_dflags_force(struct au_branch *br)
-+{
-+ struct dentry *h_dentry;
-+
-+ h_dentry = au_br_dentry(br);
-+ spin_lock(&h_dentry->d_lock);
-+ br->br_dflags = h_dentry->d_flags & DCACHE_MOUNTED;
-+ h_dentry->d_flags |= DCACHE_MOUNTED;
-+ spin_unlock(&h_dentry->d_lock);
-+}
-+
-+/* restore its d_flags */
-+static void au_br_dflags_restore(struct au_branch *br)
-+{
-+ struct dentry *h_dentry;
-+
-+ if (br->br_dflags)
-+ return;
-+
-+ h_dentry = au_br_dentry(br);
-+ spin_lock(&h_dentry->d_lock);
-+ h_dentry->d_flags &= ~DCACHE_MOUNTED;
-+ spin_unlock(&h_dentry->d_lock);
-+}
-+
+static void au_br_do_free(struct au_branch *br)
+{
+ int i;
+ else
+ break;
+
-+ au_br_dflags_restore(br);
-+
+ /* recursive lock, s_umount of branch's */
+ lockdep_off();
+ path_put(&br->br_path);
+ goto out;
+ }
+
++ if (unlikely(inode->i_sb->s_stack_depth)) {
++ pr_err("already stacked, %s (%s)\n",
++ add->pathname, au_sbtype(inode->i_sb));
++ goto out;
++ }
++
+ err = test_br(add->path.dentry->d_inode, add->perm, add->pathname);
+ if (unlikely(err))
+ goto out;
+ return err;
+}
+
-+/* intialize a new branch */
++/* initialize a new branch */
+static int au_br_init(struct au_branch *br, struct super_block *sb,
+ struct au_opt_add *add)
+{
+ memset(&br->br_xino, 0, sizeof(br->br_xino));
+ mutex_init(&br->br_xino.xi_nondir_mtx);
+ br->br_perm = add->perm;
-+ BUILD_BUG_ON(sizeof(br->br_dflags)
-+ != sizeof(br->br_path.dentry->d_flags));
-+ br->br_dflags = DCACHE_MOUNTED;
+ br->br_path = add->path; /* set first, path_get() later */
+ spin_lock_init(&br->br_dykey_lock);
+ memset(br->br_dykey, 0, sizeof(br->br_dykey));
+ struct inode *root_inode;
+ aufs_bindex_t bend, amount;
+
-+ au_br_dflags_force(br);
-+
+ root = sb->s_root;
+ root_inode = root->d_inode;
+ bend = au_sbend(sb);
+ && 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_dentry->d_parent == h_dentry)
++ && add_branch->br_xino.xi_file->f_path.dentry->d_parent == h_dentry)
+ au_xino_brid_set(sb, add_branch->br_id);
+
+out:
+ ndentry = dpage->ndentry;
+ for (j = 0; !err && j < ndentry; j++) {
+ d = dpage->dentries[j];
-+ AuDebugOn(!d_count(d));
++ AuDebugOn(au_dcount(d) <= 0);
+ if (!au_digen_test(d, sigen)) {
+ di_read_lock_child(d, AuLock_IR);
+ if (unlikely(au_dbrange_test(d))) {
+ struct file **to_free, int *idx)
+{
+ int err;
-+ unsigned char matched, unmatched;
++ unsigned char matched, root;
+ aufs_bindex_t bindex, bend;
+ struct au_fidir *fidir;
+ struct au_hfile *hfile;
+
+ err = 0;
++ root = IS_ROOT(file->f_path.dentry);
++ if (root) {
++ get_file(file);
++ to_free[*idx] = file;
++ (*idx)++;
++ goto out;
++ }
++
+ matched = 0;
-+ unmatched = 0;
+ fidir = au_fi(file)->fi_hdir;
+ AuDebugOn(!fidir);
+ bend = au_fbend_dir(file);
+ if (!hfile->hf_file)
+ continue;
+
-+ if (hfile->hf_br->br_id == br_id)
++ if (hfile->hf_br->br_id == br_id) {
+ matched = 1;
-+ else
-+ unmatched = 1;
-+ if (matched && unmatched)
+ break;
++ }
+ }
-+ if (!matched)
-+ goto out; /* success */
-+
-+ if (unmatched) {
-+ get_file(file);
-+ to_free[*idx] = file;
-+ (*idx)++;
-+ } else
++ if (matched)
+ err = -EBUSY;
+
+out:
+ unsigned long long ull, max;
+ aufs_bindex_t bstart;
+ struct file *file, **array;
-+ struct inode *inode;
+ struct dentry *root;
+ struct au_hfile *hfile;
+
+ /* AuDbg("%pD\n", file); */
+ fi_read_lock(file);
+ bstart = au_fbstart(file);
-+ inode = file_inode(file);
-+ if (!S_ISDIR(inode->i_mode)) {
++ if (!d_is_dir(file->f_path.dentry)) {
+ hfile = &au_fi(file)->fi_htop;
+ if (hfile->hf_br->br_id == br_id)
+ err = -EBUSY;
+ break;
+
+ /* AuDbg("%pD\n", file); */
-+ AuDebugOn(!S_ISDIR(file_inode(file)->i_mode));
++ AuDebugOn(!d_is_dir(file->f_path.dentry));
+ bfound = -1;
+ fidir = au_fi(file)->fi_hdir;
+ AuDebugOn(!fidir);
+
+long au_ibusy_ioctl(struct file *file, unsigned long arg)
+{
-+ return au_ibusy(file->f_dentry->d_sb, (void __user *)arg);
++ return au_ibusy(file->f_path.dentry->d_sb, (void __user *)arg);
+}
+
+#ifdef CONFIG_COMPAT
+long au_ibusy_compat_ioctl(struct file *file, unsigned long arg)
+{
-+ return au_ibusy(file->f_dentry->d_sb, compat_ptr(arg));
++ return au_ibusy(file->f_path.dentry->d_sb, compat_ptr(arg));
+}
+#endif
+
+ aufs_bindex_t br_id;
+ unsigned char verbose, writer;
+ struct file *file, *hf, **array;
-+ struct inode *inode;
+ struct au_hfile *hfile;
+
+ mnt_flags = au_mntflags(sb);
+ goto out_array;
+ }
+
-+ inode = file_inode(file);
+ hfile = &au_fi(file)->fi_htop;
+ hf = hfile->hf_file;
-+ if (!S_ISREG(inode->i_mode)
++ if (!d_is_reg(file->f_path.dentry)
+ || !(file->f_mode & FMODE_WRITE)
+ || hfile->hf_br->br_id != br_id
+ || !(hf->f_mode & FMODE_WRITE))
+ /* non-fhsm --> fhsm */
+ br->br_fhsm = bf;
+
-+ if ((br->br_perm & AuBrAttr_UNPIN)
-+ && !(mod->perm & AuBrAttr_UNPIN))
-+ au_br_dflags_force(br);
-+ else if (!(br->br_perm & AuBrAttr_UNPIN)
-+ && (mod->perm & AuBrAttr_UNPIN))
-+ au_br_dflags_restore(br);
+ *do_refresh |= need_sigen_inc(br->br_perm, mod->perm);
+ br->br_perm = mod->perm;
+ goto out; /* success */
+}
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 2014-08-14 10:15:45.118609182 +0200
-@@ -0,0 +1,268 @@
++++ linux/fs/aufs/branch.h 2015-06-22 08:29:23.703424266 +0200
+@@ -0,0 +1,279 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, 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 br_id;
+
+ int br_perm;
-+ unsigned int br_dflags;
+ struct path br_path;
+ spinlock_t br_dykey_lock;
+ struct au_dykey *br_dykey[AuBrDynOp];
+#endif
+}
+
++static inline int au_br_test_oflag(int oflag, struct au_branch *br)
++{
++ int err, exec_flag;
++
++ err = 0;
++ exec_flag = oflag & __FMODE_EXEC;
++ if (unlikely(exec_flag && (au_br_mnt(br)->mnt_flags & MNT_NOEXEC)))
++ err = -EACCES;
++
++ return err;
++}
++
+/* ---------------------------------------------------------------------- */
+
+/* branch.c */
+#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 2014-08-14 10:15:45.118609182 +0200
-@@ -0,0 +1,37 @@
++++ linux/fs/aufs/conf.mk 2015-06-22 08:27:37.874168290 +0200
+@@ -0,0 +1,38 @@
+
+AuConfStr = CONFIG_AUFS_FS=${CONFIG_AUFS_FS}
+
+ SBILIST \
+ HNOTIFY HFSNOTIFY \
+ EXPORT INO_T_64 \
++ XATTR \
+ FHSM \
+ RDU \
+ SHWH \
+-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 2014-08-14 10:15:45.118609182 +0200
-@@ -0,0 +1,1301 @@
++++ linux/fs/aufs/cpup.c 2015-06-22 08:29:23.703424266 +0200
+@@ -0,0 +1,1308 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, 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 cpup_iattr(struct dentry *dst, aufs_bindex_t bindex, struct dentry *h_src,
+ struct au_cpup_reg_attr *h_src_attr)
+{
-+ int err, sbits;
++ int err, sbits, icex;
++ unsigned int mnt_flags;
++ unsigned char verbose;
+ struct iattr ia;
+ struct path h_path;
+ struct inode *h_isrc, *h_idst;
+ struct kstat *h_st;
++ struct au_branch *br;
+
+ h_path.dentry = au_h_dptr(dst, bindex);
+ h_idst = h_path.dentry->d_inode;
-+ h_path.mnt = au_sbr_mnt(dst->d_sb, bindex);
++ br = au_sbr(dst->d_sb, bindex);
++ h_path.mnt = au_br_mnt(br);
+ h_isrc = h_src->d_inode;
+ ia.ia_valid = ATTR_FORCE | ATTR_UID | ATTR_GID
+ | ATTR_ATIME | ATTR_MTIME
+ err = vfsub_notify_change(&h_path, &ia, /*delegated*/NULL);
+ }
+
++ icex = br->br_perm & AuBrAttr_ICEX;
++ if (!err) {
++ mnt_flags = au_mntflags(dst->d_sb);
++ verbose = !!au_opt_test(mnt_flags, VERBOSE);
++ err = au_cpup_xattr(h_path.dentry, h_src, icex, verbose);
++ }
++
+ return err;
+}
+
+ AuLabel(last hole);
+
+ err = 1;
-+ if (au_test_nfs(dst->f_dentry->d_sb)) {
++ if (au_test_nfs(dst->f_path.dentry->d_sb)) {
+ /* nfs requires this step to make last hole */
+ /* is this only nfs? */
+ do {
+ char *buf;
+
+ err = -ENOMEM;
-+ blksize = dst->f_dentry->d_sb->s_blocksize;
++ blksize = dst->f_path.dentry->d_sb->s_blocksize;
+ if (!blksize || PAGE_SIZE < blksize)
+ blksize = PAGE_SIZE;
+ AuDbg("blksize %lu\n", blksize);
+ return err;
+}
+
-+#if 0 /* unused */
++#if 0 /* reserved */
+struct au_cpup_single_args {
+ int *errp;
+ struct au_cp_generic *cpg;
+ return do_sio;
+}
+
-+#if 0 /* unused */
++#if 0 /* reserved */
+int au_sio_cpup_single(struct au_cp_generic *cpg, struct dentry *dst_parent)
+{
+ int err, wkq_err;
+ h_d_start = NULL;
+ if (file) {
+ h_d_start = hdp[0 + cpg->bsrc].hd_dentry;
-+ hdp[0 + cpg->bsrc].hd_dentry = au_hf_top(file)->f_dentry;
++ hdp[0 + cpg->bsrc].hd_dentry = au_hf_top(file)->f_path.dentry;
+ }
+ flags_orig = cpg->flags;
+ cpg->flags = !AuCpup_DTIME;
+
+ dget(wh_dentry);
+ h_path.dentry = wh_dentry;
-+ if (!S_ISDIR(wh_dentry->d_inode->i_mode)) {
++ if (!d_is_dir(wh_dentry)) {
+ /* no delegation since it is just created */
+ err = vfsub_unlink(h_parent->d_inode, &h_path,
+ /*delegated*/NULL, /*force*/0);
+{
+ int err, wkq_err;
+ aufs_bindex_t bdst;
-+ struct dentry *dentry, *parent, *h_orph, *h_parent, *h_dentry;
++ struct dentry *dentry, *parent, *h_orph, *h_parent;
+ struct inode *dir, *h_dir, *h_tmpdir;
+ struct au_wbr *wbr;
+ struct au_pin wh_pin, *pin_orig;
+ h_tmpdir = h_orph->d_inode;
+ au_set_h_iptr(dir, bdst, au_igrab(h_tmpdir), /*flags*/0);
+
-+ if (file)
-+ h_dentry = au_hf_top(file)->f_dentry;
-+ else
-+ h_dentry = au_h_dptr(dentry, au_dbstart(dentry));
+ mutex_lock_nested(&h_tmpdir->i_mutex, AuLsc_I_PARENT3);
+ /* todo: au_h_open_pre()? */
+
+
+static int au_cpup_dir(struct dentry *dentry, aufs_bindex_t bdst,
+ struct au_pin *pin,
-+ struct dentry *h_parent __maybe_unused ,
++ struct dentry *h_parent __maybe_unused,
+ void *arg __maybe_unused)
+{
+ struct au_cp_generic cpg = {
+}
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 2014-01-30 21:10:02.827480967 +0100
++++ linux/fs/aufs/cpup.h 2015-06-22 08:27:37.874168290 +0200
@@ -0,0 +1,94 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+#endif /* __AUFS_CPUP_H__ */
diff -urN /usr/share/empty/fs/aufs/dbgaufs.c linux/fs/aufs/dbgaufs.c
--- /usr/share/empty/fs/aufs/dbgaufs.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/dbgaufs.c 2014-01-30 21:10:02.827480967 +0100
++++ linux/fs/aufs/dbgaufs.c 2015-06-22 08:29:23.706757681 +0200
@@ -0,0 +1,432 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, 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 = -ENOENT;
+ xf = NULL;
-+ name = &file->f_dentry->d_name;
++ name = &file->f_path.dentry->d_name;
+ if (unlikely(name->len < sizeof(DbgaufsXi_PREFIX)
+ || memcmp(name->name, DbgaufsXi_PREFIX,
+ sizeof(DbgaufsXi_PREFIX) - 1)))
+ int err;
+
+ /*
-+ * This function is a dynamic '__init' fucntion actually,
++ * This function is a dynamic '__init' function actually,
+ * so the tiny check for si_rwsem is unnecessary.
+ */
+ /* AuRwMustWriteLock(&sbinfo->si_rwsem); */
+void dbgaufs_si_fin(struct au_sbinfo *sbinfo)
+{
+ /*
-+ * This function is a dynamic '__init' fucntion actually,
++ * This function is a dynamic '__fin' function actually,
+ * so the tiny check for si_rwsem is unnecessary.
+ */
+ /* AuRwMustWriteLock(&sbinfo->si_rwsem); */
+ char name[SysaufsSiNameLen];
+
+ /*
-+ * This function is a dynamic '__init' fucntion actually,
++ * This function is a dynamic '__init' function actually,
+ * so the tiny check for si_rwsem is unnecessary.
+ */
+ /* AuRwMustWriteLock(&sbinfo->si_rwsem); */
+}
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 2014-01-30 21:10:02.827480967 +0100
++++ linux/fs/aufs/dbgaufs.h 2015-06-22 08:27:37.874168290 +0200
@@ -0,0 +1,48 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+#endif /* __DBGAUFS_H__ */
diff -urN /usr/share/empty/fs/aufs/dcsub.c linux/fs/aufs/dcsub.c
--- /usr/share/empty/fs/aufs/dcsub.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/dcsub.c 2014-01-30 21:10:02.827480967 +0100
-@@ -0,0 +1,243 @@
++++ linux/fs/aufs/dcsub.c 2015-06-22 08:27:37.877501704 +0200
+@@ -0,0 +1,224 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ dpages->ndpage++;
+ }
+
-+ AuDebugOn(!d_count(dentry));
++ AuDebugOn(au_dcount(dentry) <= 0);
+ dpage->dentries[dpage->ndentry++] = dget_dlock(dentry);
+ return 0; /* success */
+
+ return err;
+}
+
-+/* try d_walk() in linux/fs/dcache.c */
-+int au_dcsub_pages(struct au_dcsub_pages *dpages, struct dentry *root,
-+ au_dpages_test test, void *arg)
-+{
++/* todo: BAD approach */
++/* copied from linux/fs/dcache.c */
++enum d_walk_ret {
++ D_WALK_CONTINUE,
++ D_WALK_QUIT,
++ D_WALK_NORETRY,
++ D_WALK_SKIP,
++};
++
++extern void d_walk(struct dentry *parent, void *data,
++ enum d_walk_ret (*enter)(void *, struct dentry *),
++ void (*finish)(void *));
++
++struct ac_dpages_arg {
+ int err;
-+ struct dentry *this_parent;
-+ struct list_head *next;
-+ struct super_block *sb = root->d_sb;
++ struct au_dcsub_pages *dpages;
++ struct super_block *sb;
++ au_dpages_test test;
++ void *arg;
++};
+
-+ err = 0;
-+ write_seqlock(&rename_lock);
-+ this_parent = root;
-+ spin_lock(&this_parent->d_lock);
-+repeat:
-+ next = this_parent->d_subdirs.next;
-+resume:
-+ if (this_parent->d_sb == sb
-+ && !IS_ROOT(this_parent)
-+ && au_di(this_parent)
-+ && d_count(this_parent)
-+ && (!test || test(this_parent, arg))) {
-+ err = au_dpages_append(dpages, this_parent, GFP_ATOMIC);
-+ if (unlikely(err))
-+ goto out;
-+ }
++static enum d_walk_ret au_call_dpages_append(void *_arg, struct dentry *dentry)
++{
++ enum d_walk_ret ret;
++ struct ac_dpages_arg *arg = _arg;
+
-+ while (next != &this_parent->d_subdirs) {
-+ struct list_head *tmp = next;
-+ struct dentry *dentry = list_entry(tmp, struct dentry,
-+ d_u.d_child);
-+
-+ next = tmp->next;
-+ spin_lock_nested(&dentry->d_lock, DENTRY_D_LOCK_NESTED);
-+ if (d_count(dentry)) {
-+ if (!list_empty(&dentry->d_subdirs)) {
-+ spin_unlock(&this_parent->d_lock);
-+ spin_release(&dentry->d_lock.dep_map, 1,
-+ _RET_IP_);
-+ this_parent = dentry;
-+ spin_acquire(&this_parent->d_lock.dep_map, 0, 1,
-+ _RET_IP_);
-+ goto repeat;
-+ }
-+ if (dentry->d_sb == sb
-+ && au_di(dentry)
-+ && (!test || test(dentry, arg)))
-+ err = au_dpages_append(dpages, dentry,
-+ GFP_ATOMIC);
-+ }
-+ spin_unlock(&dentry->d_lock);
-+ if (unlikely(err))
-+ goto out;
++ ret = D_WALK_CONTINUE;
++ if (dentry->d_sb == arg->sb
++ && !IS_ROOT(dentry)
++ && au_dcount(dentry) > 0
++ && au_di(dentry)
++ && (!arg->test || arg->test(dentry, arg->arg))) {
++ arg->err = au_dpages_append(arg->dpages, dentry, GFP_ATOMIC);
++ if (unlikely(arg->err))
++ ret = D_WALK_QUIT;
+ }
+
-+ if (this_parent != root) {
-+ struct dentry *tmp;
-+ struct dentry *child;
++ return ret;
++}
+
-+ tmp = this_parent->d_parent;
-+ rcu_read_lock();
-+ spin_unlock(&this_parent->d_lock);
-+ child = this_parent;
-+ this_parent = tmp;
-+ spin_lock(&this_parent->d_lock);
-+ rcu_read_unlock();
-+ next = child->d_u.d_child.next;
-+ goto resume;
-+ }
++int au_dcsub_pages(struct au_dcsub_pages *dpages, struct dentry *root,
++ au_dpages_test test, void *arg)
++{
++ struct ac_dpages_arg args = {
++ .err = 0,
++ .dpages = dpages,
++ .sb = root->d_sb,
++ .test = test,
++ .arg = arg
++ };
+
-+out:
-+ spin_unlock(&this_parent->d_lock);
-+ write_sequnlock(&rename_lock);
-+ return err;
++ d_walk(root, &args, au_call_dpages_append, NULL);
++
++ return args.err;
+}
+
+int au_dcsub_pages_rev(struct au_dcsub_pages *dpages, struct dentry *dentry,
+ write_seqlock(&rename_lock);
+ spin_lock(&dentry->d_lock);
+ if (do_include
-+ && d_count(dentry)
++ && au_dcount(dentry) > 0
+ && (!test || test(dentry, arg)))
+ err = au_dpages_append(dpages, dentry, GFP_ATOMIC);
+ spin_unlock(&dentry->d_lock);
+ while (!IS_ROOT(dentry)) {
+ dentry = dentry->d_parent; /* rename_lock is locked */
+ spin_lock(&dentry->d_lock);
-+ if (d_count(dentry)
++ if (au_dcount(dentry) > 0
+ && (!test || test(dentry, arg)))
+ err = au_dpages_append(dpages, dentry, GFP_ATOMIC);
+ spin_unlock(&dentry->d_lock);
+}
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 2014-08-14 10:15:45.118609182 +0200
-@@ -0,0 +1,120 @@
++++ linux/fs/aufs/dcsub.h 2015-06-22 08:29:23.706757681 +0200
+@@ -0,0 +1,132 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, 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/dcache.h>
+#include <linux/fs.h>
+
-+struct dentry;
-+
+struct au_dpage {
+ int ndentry;
+ struct dentry **dentries;
+ && !memcmp(a->name, b->name, a->len);
+}
+
++/*
++ * by the commit
++ * 360f547 2015-01-25 dcache: let the dentry count go down to zero without
++ * taking d_lock
++ * the type of d_lockref.count became int, but the inlined function d_count()
++ * still returns unsigned int.
++ * I don't know why. Maybe it is for every d_count() users?
++ * Anyway au_dcount() lives on.
++ */
++static inline int au_dcount(struct dentry *d)
++{
++ return (int)d_count(d);
++}
++
+#endif /* __KERNEL__ */
+#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 2014-08-14 10:15:45.121942630 +0200
-@@ -0,0 +1,519 @@
++++ linux/fs/aufs/debug.c 2015-06-22 08:29:23.706757681 +0200
+@@ -0,0 +1,438 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * debug print functions
+ */
+
-+#include <linux/vt_kern.h>
+#include "aufs.h"
+
+/* Returns 0, or -errno. arg is in kp->arg. */
+MODULE_PARM_DESC(debug, "debug print");
+module_param_named(debug, aufs_debug, atomic_t, S_IRUGO | S_IWUSR | S_IWGRP);
+
++DEFINE_MUTEX(au_dbg_mtx); /* just to serialize the dbg msgs */
+char *au_plevel = KERN_DEBUG;
+#define dpri(fmt, ...) do { \
+ if ((au_plevel \
+ struct dentry *d;
+
+ spin_lock(&inode->i_lock);
-+ hlist_for_each_entry(d, &inode->i_dentry, d_alias)
++ hlist_for_each_entry(d, &inode->i_dentry, d_u.d_alias)
+ au_dpri_dentry(d);
+ spin_unlock(&inode->i_lock);
+}
+ dpri("d%d: %p, %pd2?, %s, cnt %d, flags 0x%x, %shashed\n",
+ bindex, dentry, dentry,
+ dentry->d_sb ? au_sbtype(dentry->d_sb) : "??",
-+ d_count(dentry), dentry->d_flags,
++ au_dcount(dentry), dentry->d_flags,
+ d_unhashed(dentry) ? "un" : "");
+ hn = -1;
+ if (bindex >= 0 && dentry->d_inode && au_test_aufs(dentry->d_sb)) {
+ }
+ a[0] = 0;
+ if (bindex < 0
-+ && file->f_dentry
-+ && au_test_aufs(file->f_dentry->d_sb)
++ && !IS_ERR_OR_NULL(file->f_path.dentry)
++ && au_test_aufs(file->f_path.dentry->d_sb)
+ && au_fi(file))
+ snprintf(a, sizeof(a), ", gen %d, mmapped %d",
+ au_figen(file), atomic_read(&au_fi(file)->fi_mmapped));
+ dpri("f%d: mode 0x%x, flags 0%o, cnt %ld, v %llu, pos %llu%s\n",
+ bindex, file->f_mode, file->f_flags, (long)file_count(file),
+ file->f_version, file->f_pos, a);
-+ if (file->f_dentry)
-+ do_pri_dentry(bindex, file->f_dentry);
++ if (!IS_ERR_OR_NULL(file->f_path.dentry))
++ do_pri_dentry(bindex, file->f_path.dentry);
+ return 0;
+}
+
+ int err;
+
+ err = do_pri_file(-1, file);
-+ if (err || !file->f_dentry || !au_test_aufs(file->f_dentry->d_sb))
++ if (err
++ || IS_ERR_OR_NULL(file->f_path.dentry)
++ || !au_test_aufs(file->f_path.dentry->d_sb))
+ return;
+
+ finfo = au_fi(file);
+
+/* ---------------------------------------------------------------------- */
+
-+void au_dbg_sleep_jiffy(int jiffy)
-+{
-+ while (jiffy)
-+ jiffy = schedule_timeout_uninterruptible(jiffy);
-+}
-+
-+void au_dbg_iattr(struct iattr *ia)
-+{
-+#define AuBit(name) \
-+ do { \
-+ if (ia->ia_valid & ATTR_ ## name) \
-+ dpri(#name "\n"); \
-+ } while (0)
-+ AuBit(MODE);
-+ AuBit(UID);
-+ AuBit(GID);
-+ AuBit(SIZE);
-+ AuBit(ATIME);
-+ AuBit(MTIME);
-+ AuBit(CTIME);
-+ AuBit(ATIME_SET);
-+ AuBit(MTIME_SET);
-+ AuBit(FORCE);
-+ AuBit(ATTR_FLAG);
-+ AuBit(KILL_SUID);
-+ AuBit(KILL_SGID);
-+ AuBit(FILE);
-+ AuBit(KILL_PRIV);
-+ AuBit(OPEN);
-+ AuBit(TIMES_SET);
-+#undef AuBit
-+ dpri("ia_file %p\n", ia->ia_file);
-+}
-+
-+/* ---------------------------------------------------------------------- */
-+
+void __au_dbg_verify_dinode(struct dentry *dentry, const char *func, int line)
+{
+ struct inode *h_inode, *inode = dentry->d_inode;
+ }
+}
+
-+void au_dbg_verify_dir_parent(struct dentry *dentry, unsigned int sigen)
-+{
-+ struct dentry *parent;
-+
-+ parent = dget_parent(dentry);
-+ AuDebugOn(!S_ISDIR(dentry->d_inode->i_mode));
-+ AuDebugOn(IS_ROOT(dentry));
-+ AuDebugOn(au_digen_test(parent, sigen));
-+ dput(parent);
-+}
-+
-+void au_dbg_verify_nondir_parent(struct dentry *dentry, unsigned int sigen)
-+{
-+ struct dentry *parent;
-+ struct inode *inode;
-+
-+ parent = dget_parent(dentry);
-+ inode = dentry->d_inode;
-+ AuDebugOn(inode && S_ISDIR(dentry->d_inode->i_mode));
-+ AuDebugOn(au_digen_test(parent, sigen));
-+ dput(parent);
-+}
-+
+void au_dbg_verify_gen(struct dentry *parent, unsigned int sigen)
+{
+ int err, i, j;
+
+/* ---------------------------------------------------------------------- */
+
-+void au_debug_sbinfo_init(struct au_sbinfo *sbinfo __maybe_unused)
-+{
-+#ifdef AuForceNoPlink
-+ au_opt_clr(sbinfo->si_mntflags, PLINK);
-+#endif
-+#ifdef AuForceNoXino
-+ au_opt_clr(sbinfo->si_mntflags, XINO);
-+#endif
-+#ifdef AuForceNoRefrof
-+ au_opt_clr(sbinfo->si_mntflags, REFROF);
-+#endif
-+#ifdef AuForceHnotify
-+ au_opt_set_udba(sbinfo->si_mntflags, UDBA_HNOTIFY);
-+#endif
-+#ifdef AuForceRd0
-+ sbinfo->si_rdblk = 0;
-+ sbinfo->si_rdhash = 0;
-+#endif
-+}
-+
+int __init au_debug_init(void)
+{
+ aufs_bindex_t bindex;
+ pr_warn("CONFIG_4KSTACKS is defined.\n");
+#endif
+
-+#ifdef AuForceNoBrs
-+ sysaufs_brs = 0;
-+#endif
-+
+ return 0;
+}
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 2014-01-30 21:10:02.827480967 +0100
-@@ -0,0 +1,247 @@
++++ linux/fs/aufs/debug.h 2015-06-22 08:27:37.877501704 +0200
+@@ -0,0 +1,228 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, 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_sbinfo;
-+struct au_finfo;
+struct dentry;
+#ifdef CONFIG_AUFS_DEBUG
++extern struct mutex au_dbg_mtx;
+extern char *au_plevel;
+struct au_nhash;
+void au_dpri_whlist(struct au_nhash *whlist);
+struct super_block;
+void au_dpri_sb(struct super_block *sb);
+
-+void au_dbg_sleep_jiffy(int jiffy);
-+struct iattr;
-+void au_dbg_iattr(struct iattr *ia);
-+
+#define au_dbg_verify_dinode(d) __au_dbg_verify_dinode(d, __func__, __LINE__)
+void __au_dbg_verify_dinode(struct dentry *dentry, const char *func, int line);
-+void au_dbg_verify_dir_parent(struct dentry *dentry, unsigned int sigen);
-+void au_dbg_verify_nondir_parent(struct dentry *dentry, unsigned int sigen);
+void au_dbg_verify_gen(struct dentry *parent, unsigned int sigen);
+void au_dbg_verify_kthread(void);
+
+int __init au_debug_init(void);
-+void au_debug_sbinfo_init(struct au_sbinfo *sbinfo);
++
+#define AuDbgWhlist(w) do { \
++ mutex_lock(&au_dbg_mtx); \
+ AuDbg(#w "\n"); \
+ au_dpri_whlist(w); \
++ mutex_unlock(&au_dbg_mtx); \
+} while (0)
+
+#define AuDbgVdir(v) do { \
++ mutex_lock(&au_dbg_mtx); \
+ AuDbg(#v "\n"); \
+ au_dpri_vdir(v); \
++ mutex_unlock(&au_dbg_mtx); \
+} while (0)
+
+#define AuDbgInode(i) do { \
++ mutex_lock(&au_dbg_mtx); \
+ AuDbg(#i "\n"); \
+ au_dpri_inode(i); \
++ mutex_unlock(&au_dbg_mtx); \
+} while (0)
+
+#define AuDbgDAlias(i) do { \
++ mutex_lock(&au_dbg_mtx); \
+ AuDbg(#i "\n"); \
+ au_dpri_dalias(i); \
++ mutex_unlock(&au_dbg_mtx); \
+} while (0)
+
+#define AuDbgDentry(d) do { \
++ mutex_lock(&au_dbg_mtx); \
+ AuDbg(#d "\n"); \
+ au_dpri_dentry(d); \
++ mutex_unlock(&au_dbg_mtx); \
+} while (0)
+
+#define AuDbgFile(f) do { \
++ mutex_lock(&au_dbg_mtx); \
+ AuDbg(#f "\n"); \
+ au_dpri_file(f); \
++ mutex_unlock(&au_dbg_mtx); \
+} while (0)
+
+#define AuDbgSb(sb) do { \
++ mutex_lock(&au_dbg_mtx); \
+ AuDbg(#sb "\n"); \
+ au_dpri_sb(sb); \
-+} while (0)
-+
-+#define AuDbgSleep(sec) do { \
-+ AuDbg("sleep %d sec\n", sec); \
-+ ssleep(sec); \
-+} while (0)
-+
-+#define AuDbgSleepJiffy(jiffy) do { \
-+ AuDbg("sleep %d jiffies\n", jiffy); \
-+ au_dbg_sleep_jiffy(jiffy); \
-+} while (0)
-+
-+#define AuDbgIAttr(ia) do { \
-+ AuDbg("ia_valid 0x%x\n", (ia)->ia_valid); \
-+ au_dbg_iattr(ia); \
++ mutex_unlock(&au_dbg_mtx); \
+} while (0)
+
+#define AuDbgSym(addr) do { \
+ sprint_symbol(sym, (unsigned long)addr); \
+ AuDbg("%s\n", sym); \
+} while (0)
-+
-+#define AuInfoSym(addr) do { \
-+ char sym[KSYM_SYMBOL_LEN]; \
-+ sprint_symbol(sym, (unsigned long)addr); \
-+ AuInfo("%s\n", sym); \
-+} while (0)
+#else
+AuStubVoid(au_dbg_verify_dinode, struct dentry *dentry)
+AuStubVoid(au_dbg_verify_dir_parent, struct dentry *dentry, unsigned int sigen)
+AuStubVoid(au_dbg_verify_gen, struct dentry *parent, unsigned int sigen)
+AuStubVoid(au_dbg_verify_kthread, void)
+AuStubInt0(__init au_debug_init, void)
-+AuStubVoid(au_debug_sbinfo_init, struct au_sbinfo *sbinfo)
+
+#define AuDbgWhlist(w) do {} while (0)
+#define AuDbgVdir(v) do {} while (0)
+#define AuDbgDentry(d) do {} while (0)
+#define AuDbgFile(f) do {} while (0)
+#define AuDbgSb(sb) do {} while (0)
-+#define AuDbgSleep(sec) do {} while (0)
-+#define AuDbgSleepJiffy(jiffy) do {} while (0)
-+#define AuDbgIAttr(ia) do {} while (0)
+#define AuDbgSym(addr) do {} while (0)
-+#define AuInfoSym(addr) do {} while (0)
+#endif /* CONFIG_AUFS_DEBUG */
+
+/* ---------------------------------------------------------------------- */
+#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 2014-08-14 10:16:04.515942371 +0200
-@@ -0,0 +1,1094 @@
++++ linux/fs/aufs/dentry.c 2015-06-22 08:27:37.877501704 +0200
+@@ -0,0 +1,1097 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ struct au_do_lookup_args *args)
+{
+ struct dentry *h_dentry;
-+ struct inode *h_inode, *inode;
++ struct inode *h_inode;
+ struct au_branch *br;
+ int wh_found, opq;
+ unsigned char wh_able;
+ h_dentry = vfsub_lkup_one(&dentry->d_name, h_parent);
+ else
+ h_dentry = au_sio_lkup_one(&dentry->d_name, h_parent);
-+ if (IS_ERR(h_dentry))
++ if (IS_ERR(h_dentry)) {
++ if (PTR_ERR(h_dentry) == -ENAMETOOLONG
++ && !allow_neg)
++ h_dentry = NULL;
+ goto out;
++ }
+
+ h_inode = h_dentry->d_inode;
+ if (!h_inode) {
+ au_set_dbstart(dentry, bindex);
+ au_set_h_dptr(dentry, bindex, h_dentry);
+
-+ inode = dentry->d_inode;
-+ if (!h_inode || !S_ISDIR(h_inode->i_mode) || !wh_able
-+ || (inode && !S_ISDIR(inode->i_mode)))
++ if (!d_is_dir(h_dentry)
++ || !wh_able
++ || (d_is_positive(dentry) && !d_is_dir(dentry)))
+ goto out; /* success */
+
+ mutex_lock_nested(&h_inode->i_mutex, AuLsc_I_CHILD);
+ goto out;
+
+ inode = dentry->d_inode;
-+ isdir = !!(inode && S_ISDIR(inode->i_mode));
++ isdir = !!d_is_dir(dentry);
+ if (!type)
+ au_fset_lkup(args.flags, ALLOW_NEG);
+ dirperm1 = !!au_opt_test(au_mntflags(sb), DIRPERM1);
+ continue;
+ }
+ h_parent = au_h_dptr(parent, bindex);
-+ if (!h_parent)
-+ continue;
-+ h_dir = h_parent->d_inode;
-+ if (!h_dir || !S_ISDIR(h_dir->i_mode))
++ if (!h_parent || !d_is_dir(h_parent))
+ continue;
+
++ h_dir = h_parent->d_inode;
+ mutex_lock_nested(&h_dir->i_mutex, AuLsc_I_PARENT);
+ h_dentry = au_do_lookup(h_parent, dentry, bindex, &whname,
+ &args);
+ err = PTR_ERR(h_dentry);
+ if (IS_ERR(h_dentry))
+ goto out_parent;
-+ au_fclr_lkup(args.flags, ALLOW_NEG);
++ if (h_dentry)
++ au_fclr_lkup(args.flags, ALLOW_NEG);
+ if (dirperm1)
+ au_fset_lkup(args.flags, IGNORE_PERM);
+
+static void au_hide(struct dentry *dentry)
+{
+ int err;
-+ struct inode *inode;
+
+ AuDbgDentry(dentry);
-+ inode = dentry->d_inode;
-+ if (inode && S_ISDIR(inode->i_mode)) {
++ if (d_is_dir(dentry)) {
+ /* shrink_dcache_parent(dentry); */
+ err = au_hide_children(dentry);
+ if (unlikely(err))
+ if (unlikely(!au_di(dentry)))
+ goto out;
+
-+ inode = dentry->d_inode;
-+ if (inode && is_bad_inode(inode))
-+ goto out;
-+
+ valid = 1;
+ sb = dentry->d_sb;
+ /*
+ AuTraceErr(err);
+ goto out;
+ }
++ inode = dentry->d_inode;
++ if (unlikely(inode && is_bad_inode(inode))) {
++ err = -EINVAL;
++ AuTraceErr(err);
++ goto out_dgrade;
++ }
+ if (unlikely(au_dbrange_test(dentry))) {
+ err = -EINVAL;
+ AuTraceErr(err);
+ di_downgrade_lock(dentry, AuLock_IR);
+
+ err = -EINVAL;
-+ if (!(flags & LOOKUP_OPEN)
++ if (!(flags & (LOOKUP_OPEN | LOOKUP_EMPTY))
+ && inode
+ && !(inode->i_state && I_LINKABLE)
+ && (IS_DEADDIR(inode) || !inode->i_nlink))
+};
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 2014-08-14 10:15:45.121942630 +0200
++++ linux/fs/aufs/dentry.h 2015-06-22 08:27:37.877501704 +0200
@@ -0,0 +1,233 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, 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_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 2014-08-14 10:15:45.121942630 +0200
++++ linux/fs/aufs/dinfo.c 2015-06-22 08:27:37.877501704 +0200
@@ -0,0 +1,544 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, 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 NULL;
+ AuDebugOn(bindex < 0);
+ d = au_di(dentry)->di_hdentry[0 + bindex].hd_dentry;
-+ AuDebugOn(d && d_count(d) <= 0);
++ AuDebugOn(d && au_dcount(d) <= 0);
+ return d;
+}
+
+}
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 2014-08-14 10:15:45.121942630 +0200
-@@ -0,0 +1,645 @@
++++ linux/fs/aufs/dir.c 2015-06-22 08:29:23.706757681 +0200
+@@ -0,0 +1,751 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+
+ sz = 0;
+ if (file) {
-+ AuDebugOn(!file_inode(file));
-+ AuDebugOn(!S_ISDIR(file_inode(file)->i_mode));
++ AuDebugOn(!d_is_dir(file->f_path.dentry));
+
+ bend = au_fbend_dir(file);
+ for (bindex = au_fbstart(file);
+ }
+ } else {
+ AuDebugOn(!dentry);
-+ AuDebugOn(!dentry->d_inode);
-+ AuDebugOn(!S_ISDIR(dentry->d_inode->i_mode));
++ AuDebugOn(!d_is_dir(dentry));
+
+ bend = au_dbtaildir(dentry);
+ for (bindex = au_dbstart(dentry);
+ return sz;
+}
+
++struct au_dir_ts_arg {
++ struct dentry *dentry;
++ aufs_bindex_t brid;
++};
++
++static void au_do_dir_ts(void *arg)
++{
++ struct au_dir_ts_arg *a = arg;
++ struct au_dtime dt;
++ struct path h_path;
++ struct inode *dir, *h_dir;
++ struct super_block *sb;
++ struct au_branch *br;
++ struct au_hinode *hdir;
++ int err;
++ aufs_bindex_t bstart, bindex;
++
++ sb = a->dentry->d_sb;
++ dir = a->dentry->d_inode;
++ if (!dir)
++ goto out;
++ /* no dir->i_mutex lock */
++ aufs_read_lock(a->dentry, AuLock_DW | AuLock_DIR); /* noflush */
++
++ bstart = au_ibstart(dir);
++ bindex = au_br_index(sb, a->brid);
++ if (bindex < bstart)
++ goto out_unlock;
++
++ br = au_sbr(sb, bindex);
++ h_path.dentry = au_h_dptr(a->dentry, bindex);
++ if (!h_path.dentry)
++ goto out_unlock;
++ h_path.mnt = au_br_mnt(br);
++ au_dtime_store(&dt, a->dentry, &h_path);
++
++ br = au_sbr(sb, bstart);
++ if (!au_br_writable(br->br_perm))
++ goto out_unlock;
++ h_path.dentry = au_h_dptr(a->dentry, bstart);
++ h_path.mnt = au_br_mnt(br);
++ err = vfsub_mnt_want_write(h_path.mnt);
++ if (err)
++ goto out_unlock;
++ hdir = au_hi(dir, bstart);
++ au_hn_imtx_lock_nested(hdir, AuLsc_I_PARENT);
++ h_dir = au_h_iptr(dir, bstart);
++ if (h_dir->i_nlink
++ && timespec_compare(&h_dir->i_mtime, &dt.dt_mtime) < 0) {
++ dt.dt_h_path = h_path;
++ au_dtime_revert(&dt);
++ }
++ au_hn_imtx_unlock(hdir);
++ vfsub_mnt_drop_write(h_path.mnt);
++ au_cpup_attr_timesizes(dir);
++
++out_unlock:
++ aufs_read_unlock(a->dentry, AuLock_DW);
++out:
++ dput(a->dentry);
++ au_nwt_done(&au_sbi(sb)->si_nowait);
++ kfree(arg);
++}
++
++void au_dir_ts(struct inode *dir, aufs_bindex_t bindex)
++{
++ int perm, wkq_err;
++ aufs_bindex_t bstart;
++ struct au_dir_ts_arg *arg;
++ struct dentry *dentry;
++ struct super_block *sb;
++
++ IMustLock(dir);
++
++ dentry = d_find_any_alias(dir);
++ AuDebugOn(!dentry);
++ sb = dentry->d_sb;
++ bstart = au_ibstart(dir);
++ if (bstart == bindex) {
++ au_cpup_attr_timesizes(dir);
++ goto out;
++ }
++
++ perm = au_sbr_perm(sb, bstart);
++ if (!au_br_writable(perm))
++ goto out;
++
++ arg = kmalloc(sizeof(*arg), GFP_NOFS);
++ if (!arg)
++ goto out;
++
++ arg->dentry = dget(dentry); /* will be dput-ted by au_do_dir_ts() */
++ arg->brid = au_sbr_id(sb, bindex);
++ wkq_err = au_wkq_nowait(au_do_dir_ts, arg, sb, /*flags*/0);
++ if (unlikely(wkq_err)) {
++ pr_err("wkq %d\n", wkq_err);
++ dput(dentry);
++ kfree(arg);
++ }
++
++out:
++ dput(dentry);
++}
++
+/* ---------------------------------------------------------------------- */
+
+static int reopen_dir(struct file *file)
+ struct file *h_file;
+
+ /* open all lower dirs */
-+ dentry = file->f_dentry;
++ dentry = file->f_path.dentry;
+ bstart = au_dbstart(dentry);
+ for (bindex = au_fbstart(file); bindex < bstart; bindex++)
+ au_set_h_fptr(file, bindex, NULL);
+ return err;
+}
+
-+static int do_open_dir(struct file *file, int flags)
++static int do_open_dir(struct file *file, int flags, struct file *h_file)
+{
+ int err;
+ aufs_bindex_t bindex, btail;
+ struct dentry *dentry, *h_dentry;
-+ struct file *h_file;
+
+ FiMustWriteLock(file);
++ AuDebugOn(h_file);
+
+ err = 0;
-+ dentry = file->f_dentry;
++ dentry = file->f_path.dentry;
+ file->f_version = dentry->d_inode->i_version;
+ bindex = au_dbstart(dentry);
+ au_set_fbstart(file, bindex);
+ struct au_fidir *fidir;
+
+ err = -ENOMEM;
-+ sb = file->f_dentry->d_sb;
++ sb = file->f_path.dentry->d_sb;
+ si_read_lock(sb, AuLock_FLUSH);
+ fidir = au_fidir_alloc(sb);
+ if (fidir) {
-+ err = au_do_open(file, do_open_dir, fidir);
++ struct au_do_open_args args = {
++ .open = do_open_dir,
++ .fidir = fidir
++ };
++ err = au_do_open(file, &args);
+ if (unlikely(err))
+ kfree(fidir);
+ }
+ fidir = finfo->fi_hdir;
+ if (fidir) {
+ au_sphl_del(&finfo->fi_hlist,
-+ &au_sbi(file->f_dentry->d_sb)->si_files);
++ &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);
+ if (unlikely(err))
+ goto out;
+
-+ sb = file->f_dentry->d_sb;
+ inode = file_inode(file);
++ sb = inode->i_sb;
+ bend = au_fbend_dir(file);
+ for (bindex = au_fbstart(file); !err && bindex <= bend; bindex++) {
+ h_file = au_hf_dir(file, bindex);
+ struct mutex *mtx;
+
+ err = 0;
-+ dentry = file->f_dentry;
++ dentry = file->f_path.dentry;
+ mtx = &dentry->d_inode->i_mutex;
+ mutex_lock(mtx);
+ sb = dentry->d_sb;
+
+ AuDbg("%pD, ctx{%pf, %llu}\n", file, ctx->actor, ctx->pos);
+
-+ dentry = file->f_dentry;
++ dentry = file->f_path.dentry;
+ inode = dentry->d_inode;
+ IMustLock(inode);
+
+ struct au_nhash whlist;
+ struct test_empty_arg arg = {
+ .ctx = {
-+ .actor = au_diractor(test_empty_cb)
++ .actor = test_empty_cb
+ }
+ };
+ int (*test_empty)(struct dentry *dentry, struct test_empty_arg *arg);
+ int err;
+ struct test_empty_arg arg = {
+ .ctx = {
-+ .actor = au_diractor(test_empty_cb)
++ .actor = test_empty_cb
+ }
+ };
+ aufs_bindex_t bindex, btail;
+};
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 2014-01-30 21:10:02.830814411 +0100
-@@ -0,0 +1,136 @@
++++ linux/fs/aufs/dir.h 2015-06-22 08:27:37.877501704 +0200
+@@ -0,0 +1,131 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+void au_add_nlink(struct inode *dir, struct inode *h_dir);
+void au_sub_nlink(struct inode *dir, struct inode *h_dir);
+loff_t au_dir_size(struct file *file, struct dentry *dentry);
++void au_dir_ts(struct inode *dir, aufs_bindex_t bsrc);
+int au_test_empty_lower(struct dentry *dentry);
+int au_test_empty(struct dentry *dentry, struct au_nhash *whlist);
+
+ unsigned long arg);
+#endif
+#else
-+static inline long au_rdu_ioctl(struct file *file, unsigned int cmd,
-+ unsigned long arg)
-+{
-+ return -EINVAL;
-+}
++AuStub(long, au_rdu_ioctl, return -EINVAL, struct file *file,
++ unsigned int cmd, unsigned long arg)
+#ifdef CONFIG_COMPAT
-+static inline long au_rdu_compat_ioctl(struct file *file, unsigned int cmd,
-+ unsigned long arg)
-+{
-+ return -EINVAL;
-+}
++AuStub(long, au_rdu_compat_ioctl, return -EINVAL, struct file *file,
++ unsigned int cmd, unsigned long arg)
+#endif
+#endif
+
+#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 2014-01-30 21:10:02.830814411 +0100
-@@ -0,0 +1,379 @@
++++ linux/fs/aufs/dynop.c 2015-06-22 08:29:23.706757681 +0200
+@@ -0,0 +1,369 @@
+/*
-+ * Copyright (C) 2010-2014 Junjiro R. Okajima
++ * Copyright (C) 2010-2015 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ DySetAop(invalidatepage);
+ DySetAop(releasepage);
+ DySetAop(freepage);
-+ /* these two will be changed according to an aufs mount option */
++ /* this one will be changed according to an aufs mount option */
+ DySetAop(direct_IO);
-+ DySetAop(get_xip_mem);
+ DySetAop(migratepage);
+ DySetAop(launder_page);
+ DySetAop(is_partially_uptodate);
+ DySetAop(swap_deactivate);
+
+ DyDbgSize(cnt, *h_aop);
-+ dyaop->da_get_xip_mem = h_aop->get_xip_mem;
+}
+
+/* ---------------------------------------------------------------------- */
+/* ---------------------------------------------------------------------- */
+/*
+ * Aufs prohibits O_DIRECT by defaut even if the branch supports it.
-+ * This behaviour is neccessary to return an error from open(O_DIRECT) instead
++ * 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.
-+ *
-+ * To keep this behaviour, aufs has to set NULL to ->get_xip_mem too, and the
-+ * performance of fadvise() and madvise() may be affected.
+ */
+static void dy_adx(struct au_dyaop *dyaop, int do_dx)
+{
-+ if (!do_dx) {
++ if (!do_dx)
+ dyaop->da_op.direct_IO = NULL;
-+ dyaop->da_op.get_xip_mem = NULL;
-+ } else {
++ else
+ dyaop->da_op.direct_IO = aufs_aop.direct_IO;
-+ dyaop->da_op.get_xip_mem = aufs_aop.get_xip_mem;
-+ if (!dyaop->da_get_xip_mem)
-+ dyaop->da_op.get_xip_mem = NULL;
-+ }
+}
+
+static struct au_dyaop *dy_aget(struct au_branch *br,
+}
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 2014-01-30 21:10:02.830814411 +0100
-@@ -0,0 +1,75 @@
++++ linux/fs/aufs/dynop.h 2015-06-22 08:29:23.706757681 +0200
+@@ -0,0 +1,74 @@
+/*
-+ * Copyright (C) 2010-2014 Junjiro R. Okajima
++ * Copyright (C) 2010-2015 Junjiro R. Okajima
+ *
+ * This program, 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 "inode.h"
++#include <linux/fs.h>
++#include <linux/kref.h>
+
+enum {AuDy_AOP, AuDyLast};
+
+struct au_dyaop {
+ struct au_dykey da_key;
+ struct address_space_operations da_op; /* not const */
-+ int (*da_get_xip_mem)(struct address_space *, pgoff_t, int,
-+ void **, unsigned long *);
+};
+
+/* ---------------------------------------------------------------------- */
+#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 2014-01-30 21:10:02.830814411 +0100
++++ linux/fs/aufs/export.c 2015-06-22 08:29:23.706757681 +0200
@@ -0,0 +1,831 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ dentry = d_find_alias(inode);
+ else {
+ spin_lock(&inode->i_lock);
-+ hlist_for_each_entry(d, &inode->i_dentry, d_alias) {
++ hlist_for_each_entry(d, &inode->i_dentry, d_u.d_alias) {
+ spin_lock(&d->d_lock);
+ if (!au_test_anon(d)
+ && d->d_parent->d_inode->i_ino == dir_ino) {
+ struct inode *dir;
+ struct find_name_by_ino arg = {
+ .ctx = {
-+ .actor = au_diractor(find_name_by_ino)
++ .actor = find_name_by_ino
+ }
+ };
+ int err;
+ ii_read_lock_child(inode);
+ bindex = au_ibstart(inode);
+ if (!dir) {
-+ dentry = d_find_alias(inode);
++ dentry = d_find_any_alias(inode);
+ if (unlikely(!dentry))
+ goto out_unlock;
+ AuDebugOn(au_test_anon(dentry));
+ ii_read_unlock(dir);
+ if (unlikely(!h_dir))
+ goto out_parent;
-+ h_parent = d_find_alias(h_dir);
++ h_parent = d_find_any_alias(h_dir);
+ if (unlikely(!h_parent))
+ goto out_hparent;
+
+}
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 2014-08-14 10:15:45.121942630 +0200
-@@ -0,0 +1,410 @@
++++ linux/fs/aufs/fhsm.c 2015-06-22 08:27:37.880835119 +0200
+@@ -0,0 +1,426 @@
+/*
-+ * Copyright (C) 2011-2014 Junjiro R. Okajima
++ * Copyright (C) 2011-2015 Junjiro R. Okajima
+ *
+ * This program, 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/statfs.h>
+#include "aufs.h"
+
++static aufs_bindex_t au_fhsm_bottom(struct super_block *sb)
++{
++ struct au_sbinfo *sbinfo;
++ struct au_fhsm *fhsm;
++
++ SiMustAnyLock(sb);
++
++ sbinfo = au_sbi(sb);
++ fhsm = &sbinfo->si_fhsm;
++ AuDebugOn(!fhsm);
++ return fhsm->fhsm_bottom;
++}
++
++void au_fhsm_set_bottom(struct super_block *sb, aufs_bindex_t bindex)
++{
++ struct au_sbinfo *sbinfo;
++ struct au_fhsm *fhsm;
++
++ SiMustWriteLock(sb);
++
++ sbinfo = au_sbi(sb);
++ fhsm = &sbinfo->si_fhsm;
++ AuDebugOn(!fhsm);
++ fhsm->fhsm_bottom = bindex;
++}
++
++/* ---------------------------------------------------------------------- */
++
+static int au_fhsm_test_jiffy(struct au_sbinfo *sbinfo, struct au_branch *br)
+{
+ struct au_br_fhsm *bf;
+void au_fhsm_wrote(struct super_block *sb, aufs_bindex_t bindex, int force)
+{
+ int err;
-+ unsigned char do_notify;
-+ aufs_bindex_t bend, blower;
+ struct au_sbinfo *sbinfo;
+ struct au_fhsm *fhsm;
+ struct au_branch *br;
+
+ sbinfo = au_sbi(sb);
+ fhsm = &sbinfo->si_fhsm;
-+ if (!au_ftest_si(sbinfo, FHSM))
-+ return;
-+
-+ do_notify = 0;
-+ bend = au_sbend(sb);
-+ for (blower = bindex + 1; blower <= bend; blower++) {
-+ br = au_sbr(sb, blower);
-+ if (au_br_fhsm(br->br_perm)) {
-+ do_notify = 1;
-+ break;
-+ }
-+ }
-+ if (!do_notify)
++ if (!au_ftest_si(sbinfo, FHSM)
++ || fhsm->fhsm_bottom == bindex)
+ return;
+
+ br = au_sbr(sb, bindex);
+ struct au_branch *br;
+
+ /* exclude the bottom */
-+ bend = au_sbend(sb);
++ bend = au_fhsm_bottom(sb);
+ for (bindex = 0; bindex < bend; bindex++) {
+ br = au_sbr(sb, bindex);
+ if (au_br_fhsm(br->br_perm))
+ /* except the bottom branch */
+ err = 0;
+ nstbr = 0;
-+ bend = au_sbend(sb);
++ bend = au_fhsm_bottom(sb);
+ for (bindex = 0; !err && bindex < bend; bindex++) {
+ br = au_sbr(sb, bindex);
+ if (!au_br_fhsm(br->br_perm))
+ AuDebugOn(!sb);
+ /* exclude the bottom branch */
+ nfhsm = 0;
-+ bend = au_sbend(sb);
++ bend = au_fhsm_bottom(sb);
+ for (bindex = 0; bindex < bend; bindex++) {
+ br = au_sbr(sb, bindex);
+ if (au_br_fhsm(br->br_perm))
+ atomic_set(&fhsm->fhsm_readable, 0);
+ fhsm->fhsm_expire
+ = msecs_to_jiffies(AUFS_FHSM_CACHE_DEF_SEC * MSEC_PER_SEC);
++ fhsm->fhsm_bottom = -1;
+}
+
+void au_fhsm_set(struct au_sbinfo *sbinfo, unsigned int sec)
+}
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 2014-08-14 10:16:04.515942371 +0200
-@@ -0,0 +1,835 @@
++++ linux/fs/aufs/file.c 2015-06-22 08:29:23.706757681 +0200
+@@ -0,0 +1,844 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, 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 *sb;
+ struct au_branch *br;
+ struct path h_path;
-+ int err, exec_flag;
++ int err;
+
+ /* a race condition can happen between open and unlink/rmdir */
+ h_file = ERR_PTR(-ENOENT);
+
+ sb = dentry->d_sb;
+ br = au_sbr(sb, bindex);
-+ h_file = ERR_PTR(-EACCES);
-+ exec_flag = flags & __FMODE_EXEC;
-+ if (exec_flag && (au_br_mnt(br)->mnt_flags & MNT_NOEXEC))
++ err = au_br_test_oflag(flags, br);
++ h_file = ERR_PTR(err);
++ if (unlikely(err))
+ goto out;
+
+ /* drop flags for writing */
+ if (IS_ERR(h_file))
+ goto out_br;
+
-+ if (exec_flag) {
++ if (flags & __FMODE_EXEC) {
+ err = deny_write_access(h_file);
+ if (unlikely(err)) {
+ fput(h_file);
+ .pin = &pin,
+ .flags = AuCpup_DTIME | AuCpup_HOPEN
+ };
-+ struct inode *inode, *delegated;
++ struct inode *delegated;
+ struct super_block *sb;
+ struct au_sbinfo *sbinfo;
+ struct au_fhsm *fhsm;
+ struct au_hinode *hdir;
+
+ DiMustWriteLock(dentry);
-+ inode = dentry->d_inode;
-+ IiMustWriteLock(inode);
++ IiMustWriteLock(dentry->d_inode);
+
+ err = 0;
+ if (IS_ROOT(dentry))
+ cmoo = au_br_cmoo(br->br_perm);
+ if (!cmoo)
+ goto out;
-+ if (!S_ISREG(inode->i_mode))
++ if (!d_is_reg(dentry))
+ cmoo &= AuBrAttr_COO_ALL;
+ if (!cmoo)
+ goto out;
+ return err;
+}
+
-+int au_do_open(struct file *file, int (*open)(struct file *file, int flags),
-+ struct au_fidir *fidir)
++int au_do_open(struct file *file, struct au_do_open_args *args)
+{
-+ int err;
++ int err, no_lock = args->no_lock;
+ struct dentry *dentry;
+ struct au_finfo *finfo;
+
-+ err = au_finfo_init(file, fidir);
++ if (!no_lock)
++ err = au_finfo_init(file, args->fidir);
++ else {
++ lockdep_off();
++ err = au_finfo_init(file, args->fidir);
++ lockdep_on();
++ }
+ if (unlikely(err))
+ goto out;
+
-+ dentry = file->f_dentry;
-+ di_write_lock_child(dentry);
-+ err = au_cmoo(dentry);
-+ di_downgrade_lock(dentry, AuLock_IR);
-+ if (!err)
-+ err = open(file, vfsub_file_flags(file));
-+ di_read_unlock(dentry, AuLock_IR);
++ 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)
++ 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_fbstart(file) != au_dbstart(dentry))
++ /*
++ * cmoo happens after h_file was opened.
++ * need to refresh file later.
++ */
++ atomic_dec(&au_fi(file)->fi_generation);
++ }
+
+ finfo = au_fi(file);
+ if (!err) {
+ finfo->fi_file = file;
+ au_sphl_add(&finfo->fi_hlist,
-+ &au_sbi(file->f_dentry->d_sb)->si_files);
++ &au_sbi(file->f_path.dentry->d_sb)->si_files);
++ }
++ if (!no_lock)
++ fi_write_unlock(file);
++ else {
++ lockdep_off();
++ fi_write_unlock(file);
++ lockdep_on();
+ }
-+ fi_write_unlock(file);
+ if (unlikely(err)) {
+ finfo->fi_hdir = NULL;
+ au_finfo_fin(file);
+ struct dentry *dentry;
+ struct file *h_file, *h_file_tmp;
+
-+ dentry = file->f_dentry;
++ dentry = file->f_path.dentry;
+ bstart = au_dbstart(dentry);
+ h_file_tmp = NULL;
+ if (au_fbstart(file) == bstart) {
+ struct dentry *h_dentry;
+ struct au_hdentry *hdp;
+
-+ dinfo = au_di(file->f_dentry);
++ dinfo = au_di(file->f_path.dentry);
+ AuRwMustWriteLock(&dinfo->di_rwsem);
+
+ bstart = dinfo->di_bstart;
+ struct inode *inode, *h_inode;
+ struct dentry *h_dentry, *hi_wh;
+ struct au_cp_generic cpg = {
-+ .dentry = file->f_dentry,
++ .dentry = file->f_path.dentry,
+ .bdst = bcpup,
+ .bsrc = -1,
+ .len = len,
+{
+ int err;
+ aufs_bindex_t dbstart;
-+ struct dentry *parent, *h_dentry;
++ struct dentry *parent;
+ struct inode *inode;
+ struct super_block *sb;
+ struct file *h_file;
+ struct au_cp_generic cpg = {
-+ .dentry = file->f_dentry,
++ .dentry = file->f_path.dentry,
+ .bdst = -1,
+ .bsrc = -1,
+ .len = len,
+ if (unlikely(err))
+ goto out_dgrade;
+
-+ h_dentry = au_hf_top(file)->f_dentry;
+ dbstart = au_dbstart(cpg.dentry);
-+ if (dbstart <= cpg.bdst) {
-+ h_dentry = au_h_dptr(cpg.dentry, cpg.bdst);
-+ AuDebugOn(!h_dentry);
++ if (dbstart <= cpg.bdst)
+ cpg.bsrc = cpg.bdst;
-+ }
+
+ if (dbstart <= cpg.bdst /* just reopen */
+ || !d_unhashed(cpg.dentry) /* copyup and reopen */
+ struct inode *inode;
+ struct super_block *sb;
+ struct au_cp_generic cpg = {
-+ .dentry = file->f_dentry,
++ .dentry = file->f_path.dentry,
+ .bdst = -1,
+ .bsrc = -1,
+ .len = -1,
+
+ FiMustWriteLock(file);
+
-+ sb = file->f_dentry->d_sb;
++ sb = file->f_path.dentry->d_sb;
+ finfo = au_fi(file);
+ fidir = finfo->fi_hdir;
+ AuDebugOn(!fidir);
+ }
+
+ p = fidir->fd_hfile;
-+ if (!au_test_mmapped(file) && !d_unlinked(file->f_dentry)) {
++ if (!au_test_mmapped(file) && !d_unlinked(file->f_path.dentry)) {
+ bend = au_sbend(sb);
+ for (finfo->fi_btop = 0; finfo->fi_btop <= bend;
+ finfo->fi_btop++, p++)
+ if (p->hf_file) {
+ if (file_inode(p->hf_file))
+ break;
-+ else
-+ au_hfput(p, file);
++ au_hfput(p, file);
+ }
+ } else {
+ bend = au_br_index(sb, brid);
+ if (p->hf_file) {
+ if (file_inode(p->hf_file))
+ break;
-+ else
-+ au_hfput(p, file);
++ au_hfput(p, file);
+ }
+ AuDebugOn(fidir->fd_bbot < finfo->fi_btop);
+}
+ struct au_finfo *finfo;
+ struct au_hfile *hfile;
+
-+ dentry = file->f_dentry;
++ dentry = file->f_path.dentry;
+ finfo = au_fi(file);
+ if (!finfo->fi_hdir) {
+ hfile = &finfo->fi_htop;
+ struct inode *inode;
+
+ err = 0;
-+ dentry = file->f_dentry;
++ dentry = file->f_path.dentry;
+ inode = dentry->d_inode;
+ sigen = au_sigen(dentry->d_sb);
+ fi_write_lock(file);
+ struct iov_iter *iter, loff_t offset)
+{ BUG(); return 0; }
+
-+/*
-+ * it will never be called, but madvise and fadvise behaves differently
-+ * when get_xip_mem is defined
-+ */
-+static int aufs_get_xip_mem(struct address_space *mapping, pgoff_t pgoff,
-+ int create, void **kmem, unsigned long *pfn)
-+{ BUG(); return 0; }
-+
+/* they will never be called. */
+#ifdef CONFIG_AUFS_DEBUG
+static int aufs_write_begin(struct file *file, struct address_space *mapping,
+const struct address_space_operations aufs_aop = {
+ .readpage = aufs_readpage,
+ .direct_IO = aufs_direct_IO,
-+ .get_xip_mem = aufs_get_xip_mem,
+#ifdef CONFIG_AUFS_DEBUG
+ .writepage = aufs_writepage,
+ /* no writepages, because of writepage */
+};
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 2014-08-14 10:15:45.121942630 +0200
-@@ -0,0 +1,289 @@
++++ linux/fs/aufs/file.h 2015-06-22 08:27:37.880835119 +0200
+@@ -0,0 +1,291 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+unsigned int au_file_roflags(unsigned int flags);
+struct file *au_h_open(struct dentry *dentry, aufs_bindex_t bindex, int flags,
+ struct file *file, int force_wr);
-+int au_do_open(struct file *file, int (*open)(struct file *file, int flags),
-+ struct au_fidir *fidir);
++struct au_do_open_args {
++ int no_lock;
++ int (*open)(struct file *file, int flags,
++ struct file *h_file);
++ struct au_fidir *fidir;
++ struct file *h_file;
++};
++int au_do_open(struct file *file, struct au_do_open_args *args);
+int au_reopen_nondir(struct file *file);
+struct au_pin;
+int au_ready_to_write(struct file *file, loff_t len, struct au_pin *pin);
+void au_h_open_post(struct dentry *dentry, aufs_bindex_t bindex,
+ struct file *h_file);
+#else
-+static inline
-+struct file *au_h_open_pre(struct dentry *dentry, aufs_bindex_t bindex,
-+ int force_wr)
-+{
-+ return NULL;
-+}
-+
++AuStub(struct file *, au_h_open_pre, return NULL, struct dentry *dentry,
++ aufs_bindex_t bindex, int force_wr)
+AuStubVoid(au_h_open_post, struct dentry *dentry, aufs_bindex_t bindex,
+ struct file *h_file);
+#endif
+
+/* f_op.c */
+extern const struct file_operations aufs_file_fop;
-+int au_do_open_nondir(struct file *file, int flags);
++int au_do_open_nondir(struct file *file, int flags, struct file *h_file);
+int aufs_release_nondir(struct inode *inode __maybe_unused, struct file *file);
++struct file *au_read_pre(struct file *file, int keep_fi);
+
+/* finfo.c */
+void au_hfput(struct au_hfile *hf, struct file *file);
+#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 2014-01-30 21:10:02.850815069 +0100
-@@ -0,0 +1,156 @@
++++ linux/fs/aufs/finfo.c 2015-06-22 08:29:23.706757681 +0200
+@@ -0,0 +1,157 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, 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_hfput(hf, file);
+ if (val) {
+ FiMustWriteLock(file);
++ AuDebugOn(IS_ERR_OR_NULL(file->f_path.dentry));
+ hf->hf_file = val;
-+ hf->hf_br = au_sbr(file->f_dentry->d_sb, bindex);
++ hf->hf_br = au_sbr(file->f_path.dentry->d_sb, bindex);
+ }
+}
+
+void au_update_figen(struct file *file)
+{
-+ atomic_set(&au_fi(file)->fi_generation, au_digen(file->f_dentry));
++ atomic_set(&au_fi(file)->fi_generation, au_digen(file->f_path.dentry));
+ /* smp_mb(); */ /* atomic_set */
+}
+
+{
+ struct au_finfo *finfo;
+
-+ au_nfiles_dec(file->f_dentry->d_sb);
++ au_nfiles_dec(file->f_path.dentry->d_sb);
+
+ finfo = au_fi(file);
+ AuDebugOn(finfo->fi_hdir);
+ struct dentry *dentry;
+
+ err = -ENOMEM;
-+ dentry = file->f_dentry;
++ dentry = file->f_path.dentry;
+ finfo = au_cache_alloc_finfo();
+ if (unlikely(!finfo))
+ goto out;
+}
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 2014-08-14 10:16:04.515942371 +0200
-@@ -0,0 +1,813 @@
++++ linux/fs/aufs/f_op.c 2015-06-22 08:29:23.706757681 +0200
+@@ -0,0 +1,748 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, 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/security.h>
+#include "aufs.h"
+
-+int au_do_open_nondir(struct file *file, int flags)
++int au_do_open_nondir(struct file *file, int flags, struct file *h_file)
+{
+ int err;
+ aufs_bindex_t bindex;
-+ struct file *h_file;
+ struct dentry *dentry;
+ struct au_finfo *finfo;
+ struct inode *h_inode;
+ FiMustWriteLock(file);
+
+ err = 0;
-+ dentry = file->f_dentry;
++ dentry = file->f_path.dentry;
++ AuDebugOn(IS_ERR_OR_NULL(dentry));
+ finfo = au_fi(file);
+ memset(&finfo->fi_htop, 0, sizeof(finfo->fi_htop));
+ atomic_set(&finfo->fi_mmapped, 0);
+ bindex = au_dbstart(dentry);
-+ h_file = au_h_open(dentry, bindex, flags, file, /*force_wr*/0);
++ if (!h_file)
++ h_file = au_h_open(dentry, bindex, flags, file, /*force_wr*/0);
++ else
++ get_file(h_file);
+ if (IS_ERR(h_file))
+ err = PTR_ERR(h_file);
+ else {
+{
+ int err;
+ struct super_block *sb;
++ struct au_do_open_args args = {
++ .open = au_do_open_nondir
++ };
+
+ AuDbg("%pD, f_flags 0x%x, f_mode 0x%x\n",
+ file, vfsub_file_flags(file), file->f_mode);
+
-+ sb = file->f_dentry->d_sb;
++ sb = file->f_path.dentry->d_sb;
+ si_read_lock(sb, AuLock_FLUSH);
-+ err = au_do_open(file, au_do_open_nondir, /*fidir*/NULL);
++ err = au_do_open(file, &args);
+ si_read_unlock(sb);
+ return err;
+}
+ aufs_bindex_t bindex;
+
+ finfo = au_fi(file);
-+ au_sphl_del(&finfo->fi_hlist, &au_sbi(file->f_dentry->d_sb)->si_files);
++ au_sphl_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);
+ * read functions after [fdi]_rwsem are released, but it should be harmless.
+ */
+
-+static ssize_t aufs_read(struct file *file, char __user *buf, size_t count,
-+ loff_t *ppos)
++/* Callers should call au_read_post() or fput() in the end */
++struct file *au_read_pre(struct file *file, int keep_fi)
+{
-+ ssize_t err;
-+ struct dentry *dentry;
+ struct file *h_file;
-+ struct super_block *sb;
++ int err;
+
-+ dentry = file->f_dentry;
-+ sb = dentry->d_sb;
-+ si_read_lock(sb, AuLock_FLUSH | AuLock_NOPLMW);
+ err = au_reval_and_lock_fdi(file, au_reopen_nondir, /*wlock*/0);
++ if (!err) {
++ di_read_unlock(file->f_path.dentry, AuLock_IR);
++ h_file = au_hf_top(file);
++ get_file(h_file);
++ if (!keep_fi)
++ fi_read_unlock(file);
++ } else
++ h_file = ERR_PTR(err);
++
++ return h_file;
++}
++
++static void au_read_post(struct inode *inode, struct file *h_file)
++{
++ /* update without lock, I don't think it a problem */
++ fsstack_copy_attr_atime(inode, file_inode(h_file));
++ fput(h_file);
++}
++
++struct au_write_pre {
++ blkcnt_t blks;
++ aufs_bindex_t bstart;
++};
++
++/*
++ * return with iinfo is write-locked
++ * callers should call au_write_post() or iinfo_write_unlock() + fput() in the
++ * end
++ */
++static struct file *au_write_pre(struct file *file, int do_ready,
++ struct au_write_pre *wpre)
++{
++ struct file *h_file;
++ struct dentry *dentry;
++ int err;
++ struct au_pin pin;
++
++ err = au_reval_and_lock_fdi(file, au_reopen_nondir, /*wlock*/1);
++ h_file = ERR_PTR(err);
+ if (unlikely(err))
+ goto out;
+
++ dentry = file->f_path.dentry;
++ if (do_ready) {
++ err = au_ready_to_write(file, -1, &pin);
++ if (unlikely(err)) {
++ h_file = ERR_PTR(err);
++ di_write_unlock(dentry);
++ goto out_fi;
++ }
++ }
++
++ di_downgrade_lock(dentry, /*flags*/0);
++ if (wpre)
++ wpre->bstart = au_fbstart(file);
+ h_file = au_hf_top(file);
+ get_file(h_file);
-+ di_read_unlock(dentry, AuLock_IR);
-+ fi_read_unlock(file);
++ if (wpre)
++ wpre->blks = file_inode(h_file)->i_blocks;
++ if (do_ready)
++ au_unpin(&pin);
++ di_read_unlock(dentry, /*flags*/0);
++
++out_fi:
++ fi_write_unlock(file);
++out:
++ return h_file;
++}
++
++static void au_write_post(struct inode *inode, struct file *h_file,
++ struct au_write_pre *wpre, ssize_t written)
++{
++ struct inode *h_inode;
++
++ au_cpup_attr_timesizes(inode);
++ AuDebugOn(au_ibstart(inode) != wpre->bstart);
++ h_inode = file_inode(h_file);
++ inode->i_mode = h_inode->i_mode;
++ ii_write_unlock(inode);
++ fput(h_file);
++
++ /* AuDbg("blks %llu, %llu\n", (u64)blks, (u64)h_inode->i_blocks); */
++ if (written > 0)
++ au_fhsm_wrote(inode->i_sb, wpre->bstart,
++ /*force*/h_inode->i_blocks > wpre->blks);
++}
++
++static ssize_t aufs_read(struct file *file, char __user *buf, size_t count,
++ loff_t *ppos)
++{
++ ssize_t err;
++ struct inode *inode;
++ struct file *h_file;
++ struct super_block *sb;
++
++ inode = file_inode(file);
++ sb = inode->i_sb;
++ si_read_lock(sb, AuLock_FLUSH | AuLock_NOPLMW);
++
++ h_file = au_read_pre(file, /*keep_fi*/0);
++ err = PTR_ERR(h_file);
++ if (IS_ERR(h_file))
++ goto out;
+
+ /* filedata may be obsoleted by concurrent copyup, but no problem */
+ err = vfsub_read_u(h_file, buf, count, ppos);
+ /* todo: necessary? */
+ /* file->f_ra = h_file->f_ra; */
-+ /* update without lock, I don't think it a problem */
-+ fsstack_copy_attr_atime(dentry->d_inode, file_inode(h_file));
-+ fput(h_file);
++ au_read_post(inode, h_file);
+
+out:
+ si_read_unlock(sb);
+ size_t count, loff_t *ppos)
+{
+ ssize_t err;
-+ blkcnt_t blks;
-+ aufs_bindex_t bstart;
-+ struct au_pin pin;
-+ struct dentry *dentry;
-+ struct inode *inode, *h_inode;
-+ struct super_block *sb;
++ struct au_write_pre wpre;
++ struct inode *inode;
+ struct file *h_file;
+ char __user *buf = (char __user *)ubuf;
+
-+ dentry = file->f_dentry;
-+ sb = dentry->d_sb;
-+ inode = dentry->d_inode;
++ inode = file_inode(file);
+ au_mtx_and_read_lock(inode);
+
-+ err = au_reval_and_lock_fdi(file, au_reopen_nondir, /*wlock*/1);
-+ if (unlikely(err))
-+ goto out;
-+
-+ err = au_ready_to_write(file, -1, &pin);
-+ di_downgrade_lock(dentry, AuLock_IR);
-+ if (unlikely(err)) {
-+ di_read_unlock(dentry, AuLock_IR);
-+ fi_write_unlock(file);
++ h_file = au_write_pre(file, /*do_ready*/1, &wpre);
++ err = PTR_ERR(h_file);
++ if (IS_ERR(h_file))
+ goto out;
-+ }
-+
-+ bstart = au_fbstart(file);
-+ h_file = au_hf_top(file);
-+ get_file(h_file);
-+ h_inode = h_file->f_dentry->d_inode;
-+ blks = h_inode->i_blocks;
-+ au_unpin(&pin);
-+ di_read_unlock(dentry, AuLock_IR);
-+ fi_write_unlock(file);
+
+ err = vfsub_write_u(h_file, buf, count, ppos);
-+ ii_write_lock_child(inode);
-+ au_cpup_attr_timesizes(inode);
-+ inode->i_mode = file_inode(h_file)->i_mode;
-+ AuDbg("blks %llu, %llu\n", (u64)blks, (u64)h_inode->i_blocks);
-+ if (err > 0)
-+ au_fhsm_wrote(sb, bstart, /*force*/h_inode->i_blocks > blks);
-+ ii_write_unlock(inode);
-+ fput(h_file);
++ au_write_post(inode, h_file, &wpre, err);
+
+out:
-+ si_read_unlock(sb);
++ si_read_unlock(inode->i_sb);
+ mutex_unlock(&inode->i_mutex);
+ return err;
+}
+{
+ ssize_t err;
+ struct file *file, *h_file;
-+ struct dentry *dentry;
++ struct inode *inode;
+ struct super_block *sb;
+
+ file = kio->ki_filp;
-+ dentry = file->f_dentry;
-+ sb = dentry->d_sb;
++ inode = file_inode(file);
++ sb = inode->i_sb;
+ si_read_lock(sb, AuLock_FLUSH | AuLock_NOPLMW);
-+ err = au_reval_and_lock_fdi(file, au_reopen_nondir, /*wlock*/0);
-+ if (unlikely(err))
-+ goto out;
+
-+ h_file = au_hf_top(file);
-+ get_file(h_file);
-+ di_read_unlock(dentry, AuLock_IR);
-+ fi_read_unlock(file);
++ h_file = au_read_pre(file, /*keep_fi*/0);
++ err = PTR_ERR(h_file);
++ if (IS_ERR(h_file))
++ goto out;
+
+ err = au_do_iter(h_file, MAY_READ, kio, iov_iter);
+ /* todo: necessary? */
+ /* file->f_ra = h_file->f_ra; */
-+ /* update without lock, I don't think it a problem */
-+ fsstack_copy_attr_atime(dentry->d_inode, file_inode(h_file));
-+ fput(h_file);
++ au_read_post(inode, h_file);
+
+out:
+ si_read_unlock(sb);
+static ssize_t aufs_write_iter(struct kiocb *kio, struct iov_iter *iov_iter)
+{
+ ssize_t err;
-+ blkcnt_t blks;
-+ aufs_bindex_t bstart;
-+ struct au_pin pin;
-+ struct dentry *dentry;
-+ struct inode *inode, *h_inode;
++ struct au_write_pre wpre;
++ struct inode *inode;
+ struct file *file, *h_file;
-+ struct super_block *sb;
+
+ file = kio->ki_filp;
-+ dentry = file->f_dentry;
-+ sb = dentry->d_sb;
-+ inode = dentry->d_inode;
++ inode = file_inode(file);
+ au_mtx_and_read_lock(inode);
+
-+ err = au_reval_and_lock_fdi(file, au_reopen_nondir, /*wlock*/1);
-+ if (unlikely(err))
-+ goto out;
-+
-+ err = au_ready_to_write(file, -1, &pin);
-+ di_downgrade_lock(dentry, AuLock_IR);
-+ if (unlikely(err)) {
-+ di_read_unlock(dentry, AuLock_IR);
-+ fi_write_unlock(file);
++ h_file = au_write_pre(file, /*do_ready*/1, &wpre);
++ err = PTR_ERR(h_file);
++ if (IS_ERR(h_file))
+ goto out;
-+ }
-+
-+ bstart = au_fbstart(file);
-+ h_file = au_hf_top(file);
-+ get_file(h_file);
-+ h_inode = h_file->f_dentry->d_inode;
-+ blks = h_inode->i_blocks;
-+ au_unpin(&pin);
-+ di_read_unlock(dentry, AuLock_IR);
-+ fi_write_unlock(file);
+
+ err = au_do_iter(h_file, MAY_WRITE, kio, iov_iter);
-+ ii_write_lock_child(inode);
-+ au_cpup_attr_timesizes(inode);
-+ inode->i_mode = file_inode(h_file)->i_mode;
-+ AuDbg("blks %llu, %llu\n", (u64)blks, (u64)h_inode->i_blocks);
-+ if (err > 0)
-+ au_fhsm_wrote(sb, bstart, /*force*/h_inode->i_blocks > blks);
-+ ii_write_unlock(inode);
-+ fput(h_file);
++ au_write_post(inode, h_file, &wpre, err);
+
+out:
-+ si_read_unlock(sb);
++ si_read_unlock(inode->i_sb);
+ mutex_unlock(&inode->i_mutex);
+ return err;
+}
+{
+ ssize_t err;
+ struct file *h_file;
-+ struct dentry *dentry;
++ struct inode *inode;
+ struct super_block *sb;
+
-+ dentry = file->f_dentry;
-+ sb = dentry->d_sb;
++ inode = file_inode(file);
++ sb = inode->i_sb;
+ si_read_lock(sb, AuLock_FLUSH | AuLock_NOPLMW);
-+ err = au_reval_and_lock_fdi(file, au_reopen_nondir, /*wlock*/0);
-+ if (unlikely(err))
++
++ h_file = au_read_pre(file, /*keep_fi*/1);
++ err = PTR_ERR(h_file);
++ if (IS_ERR(h_file))
+ goto out;
+
-+ err = -EINVAL;
-+ h_file = au_hf_top(file);
-+ get_file(h_file);
+ if (au_test_loopback_kthread()) {
-+ au_warn_loopback(h_file->f_dentry->d_sb);
++ au_warn_loopback(h_file->f_path.dentry->d_sb);
+ if (file->f_mapping != h_file->f_mapping) {
+ file->f_mapping = h_file->f_mapping;
+ smp_mb(); /* unnecessary? */
+ }
+ }
-+ di_read_unlock(dentry, AuLock_IR);
+ fi_read_unlock(file);
+
+ err = vfsub_splice_to(h_file, ppos, pipe, len, flags);
+ /* todo: necessasry? */
+ /* file->f_ra = h_file->f_ra; */
-+ /* update without lock, I don't think it a problem */
-+ fsstack_copy_attr_atime(dentry->d_inode, file_inode(h_file));
-+ fput(h_file);
++ au_read_post(inode, h_file);
+
+out:
+ si_read_unlock(sb);
+ size_t len, unsigned int flags)
+{
+ ssize_t err;
-+ blkcnt_t blks;
-+ aufs_bindex_t bstart;
-+ struct au_pin pin;
-+ struct dentry *dentry;
-+ struct inode *inode, *h_inode;
-+ struct super_block *sb;
++ struct au_write_pre wpre;
++ struct inode *inode;
+ struct file *h_file;
+
-+ dentry = file->f_dentry;
-+ sb = dentry->d_sb;
-+ inode = dentry->d_inode;
++ inode = file_inode(file);
+ au_mtx_and_read_lock(inode);
+
-+ err = au_reval_and_lock_fdi(file, au_reopen_nondir, /*wlock*/1);
-+ if (unlikely(err))
-+ goto out;
-+
-+ err = au_ready_to_write(file, -1, &pin);
-+ di_downgrade_lock(dentry, AuLock_IR);
-+ if (unlikely(err)) {
-+ di_read_unlock(dentry, AuLock_IR);
-+ fi_write_unlock(file);
++ h_file = au_write_pre(file, /*do_ready*/1, &wpre);
++ err = PTR_ERR(h_file);
++ if (IS_ERR(h_file))
+ goto out;
-+ }
-+
-+ bstart = au_fbstart(file);
-+ h_file = au_hf_top(file);
-+ get_file(h_file);
-+ h_inode = h_file->f_dentry->d_inode;
-+ blks = h_inode->i_blocks;
-+ au_unpin(&pin);
-+ di_read_unlock(dentry, AuLock_IR);
-+ fi_write_unlock(file);
+
+ err = vfsub_splice_from(pipe, h_file, ppos, len, flags);
-+ ii_write_lock_child(inode);
-+ au_cpup_attr_timesizes(inode);
-+ inode->i_mode = file_inode(h_file)->i_mode;
-+ AuDbg("blks %llu, %llu\n", (u64)blks, (u64)h_inode->i_blocks);
-+ if (err > 0)
-+ au_fhsm_wrote(sb, bstart, /*force*/h_inode->i_blocks > blks);
-+ ii_write_unlock(inode);
-+ fput(h_file);
++ au_write_post(inode, h_file, &wpre, err);
+
+out:
-+ si_read_unlock(sb);
++ si_read_unlock(inode->i_sb);
+ mutex_unlock(&inode->i_mutex);
+ return err;
+}
+ loff_t len)
+{
+ long err;
-+ struct au_pin pin;
-+ struct dentry *dentry;
-+ struct super_block *sb;
++ struct au_write_pre wpre;
+ struct inode *inode;
+ struct file *h_file;
+
-+ dentry = file->f_dentry;
-+ sb = dentry->d_sb;
-+ inode = dentry->d_inode;
++ inode = file_inode(file);
+ au_mtx_and_read_lock(inode);
+
-+ err = au_reval_and_lock_fdi(file, au_reopen_nondir, /*wlock*/1);
-+ if (unlikely(err))
-+ goto out;
-+
-+ err = au_ready_to_write(file, -1, &pin);
-+ di_downgrade_lock(dentry, AuLock_IR);
-+ if (unlikely(err)) {
-+ di_read_unlock(dentry, AuLock_IR);
-+ fi_write_unlock(file);
++ h_file = au_write_pre(file, /*do_ready*/1, &wpre);
++ err = PTR_ERR(h_file);
++ if (IS_ERR(h_file))
+ goto out;
-+ }
-+
-+ h_file = au_hf_top(file);
-+ get_file(h_file);
-+ au_unpin(&pin);
-+ di_read_unlock(dentry, AuLock_IR);
-+ fi_write_unlock(file);
+
+ lockdep_off();
-+ err = do_fallocate(h_file, mode, offset, len);
++ err = vfs_fallocate(h_file, mode, offset, len);
+ lockdep_on();
-+ ii_write_lock_child(inode);
-+ au_cpup_attr_timesizes(inode);
-+ inode->i_mode = file_inode(h_file)->i_mode;
-+ ii_write_unlock(inode);
-+ fput(h_file);
++ au_write_post(inode, h_file, &wpre, /*written*/1);
+
+out:
-+ si_read_unlock(sb);
++ si_read_unlock(inode->i_sb);
+ mutex_unlock(&inode->i_mutex);
+ return err;
+}
+static int aufs_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ int err;
-+ aufs_bindex_t bstart;
+ const unsigned char wlock
+ = (file->f_mode & FMODE_WRITE) && (vma->vm_flags & VM_SHARED);
-+ struct dentry *dentry;
+ struct super_block *sb;
+ struct file *h_file;
-+ struct au_branch *br;
-+ struct au_pin pin;
++ struct inode *inode;
+
+ AuDbgVmRegion(file, vma);
+
-+ dentry = file->f_dentry;
-+ sb = dentry->d_sb;
++ inode = file_inode(file);
++ sb = inode->i_sb;
+ lockdep_off();
+ si_read_lock(sb, AuLock_NOPLMW);
-+ err = au_reval_and_lock_fdi(file, au_reopen_nondir, /*wlock*/1);
-+ if (unlikely(err))
-+ goto out;
+
-+ if (wlock) {
-+ err = au_ready_to_write(file, -1, &pin);
-+ di_write_unlock(dentry);
-+ if (unlikely(err)) {
-+ fi_write_unlock(file);
-+ goto out;
-+ }
-+ au_unpin(&pin);
-+ } else
-+ di_write_unlock(dentry);
-+
-+ bstart = au_fbstart(file);
-+ br = au_sbr(sb, bstart);
-+ h_file = au_hf_top(file);
-+ get_file(h_file);
-+ au_set_mmapped(file);
-+ fi_write_unlock(file);
++ h_file = au_write_pre(file, wlock, /*wpre*/NULL);
+ lockdep_on();
++ err = PTR_ERR(h_file);
++ if (IS_ERR(h_file))
++ goto out;
+
++ err = 0;
++ au_set_mmapped(file);
+ au_vm_file_reset(vma, h_file);
+ /*
+ * we cannot call security_mmap_file() here since it may acquire
+ */
+ if (!err)
+ err = h_file->f_op->mmap(h_file, vma);
-+ if (unlikely(err))
-+ goto out_reset;
-+
-+ au_vm_prfile_set(vma, file);
-+ /* update without lock, I don't think it a problem */
-+ fsstack_copy_attr_atime(file_inode(file), file_inode(h_file));
-+ goto out_fput; /* success */
-+
-+out_reset:
++ if (!err) {
++ au_vm_prfile_set(vma, file);
++ fsstack_copy_attr_atime(inode, file_inode(h_file));
++ goto out_fput; /* success */
++ }
+ au_unset_mmapped(file);
+ au_vm_file_reset(vma, file);
++
+out_fput:
-+ fput(h_file);
+ lockdep_off();
++ ii_write_unlock(inode);
++ lockdep_on();
++ fput(h_file);
+out:
++ lockdep_off();
+ si_read_unlock(sb);
+ lockdep_on();
+ AuTraceErr(err);
+ int datasync)
+{
+ int err;
-+ struct au_pin pin;
-+ struct dentry *dentry;
++ struct au_write_pre wpre;
+ struct inode *inode;
+ struct file *h_file;
-+ struct super_block *sb;
-+
-+ dentry = file->f_dentry;
-+ inode = dentry->d_inode;
-+ sb = dentry->d_sb;
-+ mutex_lock(&inode->i_mutex);
-+ err = si_read_lock(sb, AuLock_FLUSH | AuLock_NOPLM);
-+ if (unlikely(err))
-+ goto out;
+
+ err = 0; /* -EBADF; */ /* posix? */
+ if (unlikely(!(file->f_mode & FMODE_WRITE)))
-+ goto out_si;
-+ err = au_reval_and_lock_fdi(file, au_reopen_nondir, /*wlock*/1);
-+ if (unlikely(err))
-+ goto out_si;
++ goto out;
+
-+ err = au_ready_to_write(file, -1, &pin);
-+ di_downgrade_lock(dentry, AuLock_IR);
-+ if (unlikely(err))
++ inode = file_inode(file);
++ au_mtx_and_read_lock(inode);
++
++ h_file = au_write_pre(file, /*do_ready*/1, &wpre);
++ err = PTR_ERR(h_file);
++ if (IS_ERR(h_file))
+ goto out_unlock;
-+ au_unpin(&pin);
+
-+ err = -EINVAL;
-+ h_file = au_hf_top(file);
+ err = vfsub_fsync(h_file, &h_file->f_path, datasync);
-+ au_cpup_attr_timesizes(inode);
++ au_write_post(inode, h_file, &wpre, /*written*/0);
+
+out_unlock:
-+ di_read_unlock(dentry, AuLock_IR);
-+ fi_write_unlock(file);
-+out_si:
-+ si_read_unlock(sb);
-+out:
++ si_read_unlock(inode->i_sb);
+ mutex_unlock(&inode->i_mutex);
++out:
+ return err;
+}
+
+static int aufs_aio_fsync_nondir(struct kiocb *kio, int datasync)
+{
+ int err;
-+ struct au_pin pin;
-+ struct dentry *dentry;
++ struct au_write_pre wpre;
+ struct inode *inode;
+ struct file *file, *h_file;
+
-+ file = kio->ki_filp;
-+ dentry = file->f_dentry;
-+ inode = dentry->d_inode;
-+ au_mtx_and_read_lock(inode);
-+
+ err = 0; /* -EBADF; */ /* posix? */
+ if (unlikely(!(file->f_mode & FMODE_WRITE)))
+ goto out;
-+ err = au_reval_and_lock_fdi(file, au_reopen_nondir, /*wlock*/1);
-+ if (unlikely(err))
-+ goto out;
+
-+ err = au_ready_to_write(file, -1, &pin);
-+ di_downgrade_lock(dentry, AuLock_IR);
-+ if (unlikely(err))
++ file = kio->ki_filp;
++ inode = file_inode(file);
++ au_mtx_and_read_lock(inode);
++
++ h_file = au_write_pre(file, /*do_ready*/1, &wpre);
++ err = PTR_ERR(h_file);
++ if (IS_ERR(h_file))
+ goto out_unlock;
-+ au_unpin(&pin);
+
+ err = -ENOSYS;
+ h_file = au_hf_top(file);
+ if (!err)
+ vfsub_update_h_iattr(&h_file->f_path, /*did*/NULL);
+ /*ignore*/
-+ au_cpup_attr_timesizes(inode);
+ mutex_unlock(h_mtx);
+ }
++ au_write_post(inode, h_file, &wpre, /*written*/0);
+
+out_unlock:
-+ di_read_unlock(dentry, AuLock_IR);
-+ fi_write_unlock(file);
-+out:
+ si_read_unlock(inode->sb);
+ mutex_unlock(&inode->i_mutex);
++out:
+ return err;
+}
+#endif
+{
+ int err;
+ struct file *h_file;
-+ struct dentry *dentry;
+ struct super_block *sb;
+
-+ dentry = file->f_dentry;
-+ sb = dentry->d_sb;
++ sb = file->f_path.dentry->d_sb;
+ si_read_lock(sb, AuLock_FLUSH | AuLock_NOPLMW);
-+ err = au_reval_and_lock_fdi(file, au_reopen_nondir, /*wlock*/0);
-+ if (unlikely(err))
++
++ h_file = au_read_pre(file, /*keep_fi*/0);
++ err = PTR_ERR(h_file);
++ if (IS_ERR(h_file))
+ goto out;
+
-+ h_file = au_hf_top(file);
+ if (h_file->f_op->fasync)
+ err = h_file->f_op->fasync(fd, h_file, flag);
-+
-+ di_read_unlock(dentry, AuLock_IR);
-+ fi_read_unlock(file);
++ fput(h_file); /* instead of au_read_post() */
+
+out:
+ si_read_unlock(sb);
+/* no one supports this operation, currently */
+#if 0
+static ssize_t aufs_sendpage(struct file *file, struct page *page, int offset,
-+ size_t len, loff_t *pos , int more)
++ size_t len, loff_t *pos, int more)
+{
+}
+#endif
+};
diff -urN /usr/share/empty/fs/aufs/fstype.h linux/fs/aufs/fstype.h
--- /usr/share/empty/fs/aufs/fstype.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/fstype.h 2014-01-30 21:10:02.850815069 +0100
-@@ -0,0 +1,469 @@
++++ linux/fs/aufs/fstype.h 2015-06-22 08:27:37.880835119 +0200
+@@ -0,0 +1,400 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, 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/magic.h>
+#include <linux/romfs_fs.h>
++#include <linux/nfs_fs.h>
+
+static inline int au_test_aufs(struct super_block *sb)
+{
+
+static inline int au_test_iso9660(struct super_block *sb __maybe_unused)
+{
-+#if defined(CONFIG_ROMFS_FS) || defined(CONFIG_ROMFS_FS_MODULE)
-+ return sb->s_magic == ROMFS_MAGIC;
++#if defined(CONFIG_ISO9660_FS) || defined(CONFIG_ISO9660_FS_MODULE)
++ return sb->s_magic == ISOFS_SUPER_MAGIC;
+#else
+ return 0;
+#endif
+
+static inline int au_test_romfs(struct super_block *sb __maybe_unused)
+{
-+#if defined(CONFIG_ISO9660_FS) || defined(CONFIG_ISO9660_FS_MODULE)
-+ return sb->s_magic == ISOFS_SUPER_MAGIC;
++#if defined(CONFIG_ROMFS_FS) || defined(CONFIG_ROMFS_FS_MODULE)
++ return sb->s_magic == ROMFS_MAGIC;
+#else
+ return 0;
+#endif
+#endif
+}
+
-+static inline int au_test_ocfs2(struct super_block *sb __maybe_unused)
-+{
-+#if defined(CONFIG_OCFS2_FS) || defined(CONFIG_OCFS2_FS_MODULE)
-+ return sb->s_magic == OCFS2_SUPER_MAGIC;
-+#else
-+ return 0;
-+#endif
-+}
-+
-+static inline int au_test_ocfs2_dlmfs(struct super_block *sb __maybe_unused)
-+{
-+#if defined(CONFIG_OCFS2_FS_O2CB) || defined(CONFIG_OCFS2_FS_O2CB_MODULE)
-+ return sb->s_magic == DLMFS_MAGIC;
-+#else
-+ return 0;
-+#endif
-+}
-+
-+static inline int au_test_coda(struct super_block *sb __maybe_unused)
-+{
-+#if defined(CONFIG_CODA_FS) || defined(CONFIG_CODA_FS_MODULE)
-+ return sb->s_magic == CODA_SUPER_MAGIC;
-+#else
-+ return 0;
-+#endif
-+}
-+
-+static inline int au_test_v9fs(struct super_block *sb __maybe_unused)
-+{
-+#if defined(CONFIG_9P_FS) || defined(CONFIG_9P_FS_MODULE)
-+ return sb->s_magic == V9FS_MAGIC;
-+#else
-+ return 0;
-+#endif
-+}
-+
-+static inline int au_test_ext4(struct super_block *sb __maybe_unused)
-+{
-+#if defined(CONFIG_EXT4_FS) || defined(CONFIG_EXT4_FS_MODULE)
-+ return sb->s_magic == EXT4_SUPER_MAGIC;
-+#else
-+ return 0;
-+#endif
-+}
-+
-+static inline int au_test_sysv(struct super_block *sb __maybe_unused)
-+{
-+#if defined(CONFIG_SYSV_FS) || defined(CONFIG_SYSV_FS_MODULE)
-+ return !strcmp(au_sbtype(sb), "sysv");
-+#else
-+ return 0;
-+#endif
-+}
-+
+static inline int au_test_ramfs(struct super_block *sb)
+{
+ return sb->s_magic == RAMFS_MAGIC;
+#endif
+}
+
-+static inline int au_test_cifs(struct super_block *sb __maybe_unused)
-+{
-+#if defined(CONFIG_CIFS_FS) || defined(CONFIGCIFS_FS_MODULE)
-+ return sb->s_magic == CIFS_MAGIC_NUMBER;
-+#else
-+ return 0;
-+#endif
-+}
-+
+static inline int au_test_fat(struct super_block *sb __maybe_unused)
+{
+#if defined(CONFIG_FAT_FS) || defined(CONFIG_FAT_FS_MODULE)
+{
+ return au_test_nfs(sb)
+ || au_test_fuse(sb)
-+ /* || au_test_ocfs2(sb) */ /* untested */
+ /* || au_test_btrfs(sb) */ /* untested */
-+ /* || au_test_coda(sb) */ /* untested */
-+ /* || au_test_v9fs(sb) */ /* untested */
+ ;
+}
+
+ || au_test_btrfs(sb)
+ || au_test_ubifs(sb)
+ || au_test_hfsplus(sb) /* maintained, but incorrect */
-+ /* || au_test_ext4(sb) */ /* untested */
-+ /* || au_test_ocfs2(sb) */ /* untested */
-+ /* || au_test_ocfs2_dlmfs(sb) */ /* untested */
-+ /* || au_test_sysv(sb) */ /* untested */
+ /* || au_test_minix(sb) */ /* untested */
+ ;
+}
+static inline int au_test_fs_bad_iattr(struct super_block *sb)
+{
+ return au_test_fs_bad_iattr_size(sb)
-+ /* || au_test_cifs(sb) */ /* untested */
+ || au_test_fat(sb)
+ || au_test_msdos(sb)
+ || au_test_vfat(sb);
+ return au_test_nfs(sb)
+ || au_test_fuse(sb)
+ || au_test_ubifs(sb)
-+ /* || au_test_cifs(sb) */ /* untested */
+ ;
+}
+
-+/*
-+ * filesystems which requires replacing i_mapping.
-+ */
-+static inline int au_test_fs_bad_mapping(struct super_block *sb)
-+{
-+ return au_test_fuse(sb)
-+ || au_test_ubifs(sb);
-+}
-+
+/* temporary support for i#1 in cramfs */
+static inline int au_test_fs_unique_ino(struct inode *inode)
+{
+ || au_test_romfs(sb);
+}
+
++/*
++ * test if the @inode is nfs with 'noacl' option
++ * NFS always sets MS_POSIXACL regardless its mount option 'noacl.'
++ */
++static inline int au_test_nfs_noacl(struct inode *inode)
++{
++ return au_test_nfs(inode->i_sb)
++ /* && IS_POSIXACL(inode) */
++ && !nfs_server_capable(inode, NFS_CAP_ACLS);
++}
++
+#endif /* __KERNEL__ */
+#endif /* __AUFS_FSTYPE_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 2014-08-14 10:16:04.515942371 +0200
-@@ -0,0 +1,281 @@
++++ linux/fs/aufs/hfsnotify.c 2015-06-22 08:27:37.880835119 +0200
+@@ -0,0 +1,288 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * 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);
+ /* even if err */
+ fsnotify_put_mark(mark);
++ lockdep_on();
+
+ return err;
+}
+ group = mark->group;
+ fsnotify_get_group(group);
+ spin_unlock(&mark->lock);
++ lockdep_off();
+ fsnotify_destroy_mark(mark, group);
+ fsnotify_put_group(group);
++ lockdep_on();
+
+ /* free hn by myself */
+ return 0;
+ test_ret(FS_UNMOUNT);
+ test_ret(FS_Q_OVERFLOW);
+ test_ret(FS_IN_IGNORED);
-+ test_ret(FS_IN_ISDIR);
++ test_ret(FS_ISDIR);
+ test_ret(FS_IN_ONESHOT);
+ test_ret(FS_EVENT_ON_CHILD);
+ return "";
+ struct au_br_hfsnotify *hfsn;
+
+ hfsn = br->br_hfsn;
-+ if (hfsn)
++ if (hfsn) {
++ lockdep_off();
+ fsnotify_put_group(hfsn->hfsn_group);
++ lockdep_on();
++ }
+}
+
+static int au_hfsn_init_br(struct au_branch *br, int perm)
+};
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 2014-01-30 21:10:02.850815069 +0100
++++ linux/fs/aufs/hfsplus.c 2015-06-22 08:29:23.706757681 +0200
@@ -0,0 +1,56 @@
+/*
-+ * Copyright (C) 2010-2014 Junjiro R. Okajima
++ * Copyright (C) 2010-2015 Junjiro R. Okajima
+ *
+ * This program, 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_file = NULL;
+ if (au_test_hfsplus(h_dentry->d_sb)
-+ && S_ISREG(h_dentry->d_inode->i_mode))
++ && d_is_reg(h_dentry))
+ h_file = au_h_open(dentry, bindex,
+ O_RDONLY | O_NOATIME | O_LARGEFILE,
+ /*file*/NULL, force_wr);
+}
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 2014-08-14 10:16:04.515942371 +0200
++++ linux/fs/aufs/hnotify.c 2015-06-22 08:29:23.706757681 +0200
@@ -0,0 +1,714 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ AuDebugOn(!name);
+ au_iigen_dec(inode);
+ spin_lock(&inode->i_lock);
-+ hlist_for_each_entry(d, &inode->i_dentry, d_alias) {
++ hlist_for_each_entry(d, &inode->i_dentry, d_u.d_alias) {
+ spin_lock(&d->d_lock);
+ dname = &d->d_name;
+ if (dname->len != nlen
+ spin_unlock(&inode->i_lock);
+ } else {
+ au_fset_si(au_sbi(inode->i_sb), FAILED_REFRESH_DIR);
-+ d = d_find_alias(inode);
++ d = d_find_any_alias(inode);
+ if (!d) {
+ au_iigen_dec(inode);
+ goto out;
+ struct dentry *dentry, *d, *parent;
+ struct qstr *dname;
+
-+ parent = d_find_alias(dir);
++ parent = d_find_any_alias(dir);
+ if (!parent)
+ return NULL;
+
+ dentry = NULL;
+ spin_lock(&parent->d_lock);
-+ list_for_each_entry(d, &parent->d_subdirs, d_u.d_child) {
++ list_for_each_entry(d, &parent->d_subdirs, d_child) {
+ /* AuDbg("%pd\n", d); */
+ spin_lock_nested(&d->d_lock, DENTRY_D_LOCK_NESTED);
+ dname = &d->d_name;
+ au_digen_dec(d);
+ else
+ goto cont_unlock;
-+ if (d_count(d)) {
++ if (au_dcount(d) > 0) {
+ dentry = dget_dlock(d);
+ spin_unlock(&d->d_lock);
+ break;
+}
diff -urN /usr/share/empty/fs/aufs/iinfo.c linux/fs/aufs/iinfo.c
--- /usr/share/empty/fs/aufs/iinfo.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/iinfo.c 2014-08-14 10:15:45.128609525 +0200
++++ linux/fs/aufs/iinfo.c 2015-06-22 08:27:37.884168534 +0200
@@ -0,0 +1,277 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, 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 2014-08-14 10:15:45.128609525 +0200
-@@ -0,0 +1,492 @@
++++ linux/fs/aufs/inode.c 2015-06-22 08:27:37.884168534 +0200
+@@ -0,0 +1,495 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, 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_igrab(h_dentry->d_inode), flags);
+ }
+ au_cpup_attr_all(inode, /*force*/1);
++ /*
++ * to force calling aufs_get_acl() every time,
++ * do not call cache_no_acl() for aufs inode.
++ */
+
+out:
+ return err;
+/* todo: return with unlocked? */
+struct inode *au_new_inode(struct dentry *dentry, int must_new)
+{
-+ struct inode *inode, *h_inode;
++ struct inode *inode;
+ struct dentry *h_dentry;
+ struct super_block *sb;
+ struct mutex *mtx;
+ sb = dentry->d_sb;
+ bstart = au_dbstart(dentry);
+ h_dentry = au_h_dptr(dentry, bstart);
-+ h_inode = h_dentry->d_inode;
-+ h_ino = h_inode->i_ino;
++ h_ino = h_dentry->d_inode->i_ino;
+
+ /*
+ * stop 'race'-ing between hardlinks under different
+ * parents.
+ */
+ mtx = NULL;
-+ if (!S_ISDIR(h_inode->i_mode))
++ if (!d_is_dir(h_dentry))
+ mtx = &au_sbr(sb, bstart)->br_xino.xi_nondir_mtx;
+
+new_ino:
+ AuDbg("%lx, new %d\n", inode->i_state, !!(inode->i_state & I_NEW));
+ if (inode->i_state & I_NEW) {
+ /* verbose coding for lock class name */
-+ if (unlikely(S_ISLNK(h_inode->i_mode)))
++ if (unlikely(d_is_symlink(h_dentry)))
+ au_rw_class(&au_ii(inode)->ii_rwsem,
+ au_lc_key + AuLcSymlink_IIINFO);
-+ else if (unlikely(S_ISDIR(h_inode->i_mode)))
++ else if (unlikely(d_is_dir(h_dentry)))
+ au_rw_class(&au_ii(inode)->ii_rwsem,
+ au_lc_key + AuLcDir_IIINFO);
+ else /* likely */
+}
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 2014-08-14 10:15:45.128609525 +0200
-@@ -0,0 +1,601 @@
++++ linux/fs/aufs/inode.h 2015-06-22 08:27:37.884168534 +0200
+@@ -0,0 +1,673 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+};
+
+void au_pin_hdir_unlock(struct au_pin *p);
++int au_pin_hdir_lock(struct au_pin *p);
+int au_pin_hdir_relock(struct au_pin *p);
+void au_pin_hdir_set_owner(struct au_pin *p, struct task_struct *task);
+void au_pin_hdir_acquire_nest(struct au_pin *p);
+
+/* au_wr_dir flags */
+#define AuWrDir_ADD_ENTRY 1
-+#define AuWrDir_TMP_WHENTRY (1 << 1)
-+#define AuWrDir_ISDIR (1 << 2)
-+#define AuWrDir_TMPFILE (1 << 3)
++#define AuWrDir_ISDIR (1 << 1)
++#define AuWrDir_TMPFILE (1 << 2)
+#define au_ftest_wrdir(flags, name) ((flags) & AuWrDir_##name)
+#define au_fset_wrdir(flags, name) \
+ do { (flags) |= AuWrDir_##name; } while (0)
+ unsigned int udba, unsigned char flags) __must_check;
+int au_do_pin(struct au_pin *pin) __must_check;
+void au_unpin(struct au_pin *pin);
++int au_reval_for_attr(struct dentry *dentry, unsigned int sigen);
++
++#define AuIcpup_DID_CPUP 1
++#define au_ftest_icpup(flags, name) ((flags) & AuIcpup_##name)
++#define au_fset_icpup(flags, name) \
++ do { (flags) |= AuIcpup_##name; } while (0)
++#define au_fclr_icpup(flags, name) \
++ do { (flags) &= ~AuIcpup_##name; } while (0)
++
++struct au_icpup_args {
++ unsigned char flags;
++ unsigned char pin_flags;
++ aufs_bindex_t btgt;
++ unsigned int udba;
++ struct au_pin pin;
++ struct path h_path;
++ struct inode *h_inode;
++};
++
++int au_pin_and_icpup(struct dentry *dentry, struct iattr *ia,
++ struct au_icpup_args *a);
++
++int au_h_path_getattr(struct dentry *dentry, int force, struct path *h_path);
+
+/* i_op_add.c */
+int au_may_add(struct dentry *dentry, aufs_bindex_t bindex,
+int aufs_symlink(struct inode *dir, struct dentry *dentry, const char *symname);
+int aufs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
+ bool want_excl);
++struct vfsub_aopen_args;
++int au_aopen_or_create(struct inode *dir, struct dentry *dentry,
++ struct vfsub_aopen_args *args);
+int aufs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode);
+int aufs_link(struct dentry *src_dentry, struct inode *dir,
+ struct dentry *dentry);
+#ifdef CONFIG_PROC_FS
+/* plink.c */
+int au_plink_maint(struct super_block *sb, int flags);
++struct au_sbinfo;
+void au_plink_maint_leave(struct au_sbinfo *sbinfo);
+int au_plink_maint_enter(struct super_block *sb);
+#ifdef CONFIG_AUFS_DEBUG
+AuStubVoid(au_plink_half_refresh, struct super_block *sb, aufs_bindex_t br_id);
+#endif /* CONFIG_PROC_FS */
+
++#ifdef CONFIG_AUFS_XATTR
++/* xattr.c */
++int au_cpup_xattr(struct dentry *h_dst, struct dentry *h_src, int ignore_flags,
++ unsigned int verbose);
++ssize_t aufs_listxattr(struct dentry *dentry, char *list, size_t size);
++ssize_t aufs_getxattr(struct dentry *dentry, const char *name, void *value,
++ size_t size);
++int aufs_setxattr(struct dentry *dentry, const char *name, const void *value,
++ size_t size, int flags);
++int aufs_removexattr(struct dentry *dentry, const char *name);
++
++/* void au_xattr_init(struct super_block *sb); */
++#else
++AuStubInt0(au_cpup_xattr, struct dentry *h_dst, struct dentry *h_src,
++ int ignore_flags, unsigned int verbose);
++/* AuStubVoid(au_xattr_init, struct super_block *sb); */
++#endif
++
++#ifdef CONFIG_FS_POSIX_ACL
++struct posix_acl *aufs_get_acl(struct inode *inode, int type);
++int aufs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
++#endif
++
++#if IS_ENABLED(CONFIG_AUFS_XATTR) || IS_ENABLED(CONFIG_FS_POSIX_ACL)
++enum {
++ AU_XATTR_SET,
++ AU_XATTR_REMOVE,
++ AU_ACL_SET
++};
++
++struct au_srxattr {
++ int type;
++ union {
++ struct {
++ const char *name;
++ const void *value;
++ size_t size;
++ int flags;
++ } set;
++ struct {
++ const char *name;
++ } remove;
++ struct {
++ struct posix_acl *acl;
++ int type;
++ } acl_set;
++ } u;
++};
++ssize_t au_srxattr(struct dentry *dentry, struct au_srxattr *arg);
++#endif
++
+/* ---------------------------------------------------------------------- */
+
+/* lock subclass for iinfo */
+ }
+}
+
++#if 0 /* reserved */
+static inline void au_pin_set_parent(struct au_pin *pin, struct dentry *parent)
+{
+ if (pin) {
+ pin->parent = dget(parent);
+ }
+}
++#endif
+
+/* ---------------------------------------------------------------------- */
+
+}
+
+#else
-+static inline
-+int au_hn_alloc(struct au_hinode *hinode __maybe_unused,
-+ struct inode *inode __maybe_unused)
-+{
-+ return -EOPNOTSUPP;
-+}
-+
-+static inline struct au_hnotify *au_hn(struct au_hinode *hinode)
-+{
-+ return NULL;
-+}
-+
++AuStub(int, au_hn_alloc, return -EOPNOTSUPP,
++ struct au_hinode *hinode __maybe_unused,
++ struct inode *inode __maybe_unused)
++AuStub(struct au_hnotify *, au_hn, return NULL, struct au_hinode *hinode)
+AuStubVoid(au_hn_free, struct au_hinode *hinode __maybe_unused)
+AuStubVoid(au_hn_ctl, struct au_hinode *hinode __maybe_unused,
+ int do_set __maybe_unused)
+#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 2014-08-14 10:15:45.128609525 +0200
-@@ -0,0 +1,214 @@
++++ linux/fs/aufs/ioctl.c 2015-06-22 08:29:23.706757681 +0200
+@@ -0,0 +1,219 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, 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;
+ }
+
-+ fd = get_unused_fd();
++ fd = get_unused_fd_flags(0);
+ err = fd;
+ if (unlikely(fd < 0))
+ goto out;
+long aufs_ioctl_dir(struct file *file, unsigned int cmd, unsigned long arg)
+{
+ long err;
++ struct dentry *dentry;
+
+ switch (cmd) {
+ case AUFS_CTL_RDU:
+ break;
+
+ case AUFS_CTL_FHSM_FD:
-+ err = au_fhsm_fd(file->f_dentry->d_sb, arg);
++ dentry = file->f_path.dentry;
++ if (IS_ROOT(dentry))
++ err = au_fhsm_fd(dentry->d_sb, arg);
++ else
++ err = -ENOTTY;
+ break;
+
+ default:
+
+ switch (cmd) {
+ case AUFS_CTL_MVDOWN:
-+ err = au_mvdown(file->f_dentry, (void __user *)arg);
++ err = au_mvdown(file->f_path.dentry, (void __user *)arg);
+ break;
+
+ case AUFS_CTL_WBR_FD:
+#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 2014-08-14 10:15:45.121942630 +0200
-@@ -0,0 +1,885 @@
++++ linux/fs/aufs/i_op_add.c 2015-06-22 08:27:37.880835119 +0200
+@@ -0,0 +1,930 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ d_instantiate(dentry, inode);
+ dir = dentry->d_parent->d_inode; /* dir inode is locked */
+ IMustLock(dir);
-+ if (au_ibstart(dir) == au_dbstart(dentry))
-+ au_cpup_attr_timesizes(dir);
++ au_dir_ts(dir, bindex);
+ dir->i_version++;
+ au_fhsm_wrote(sb, bindex, /*force*/0);
+ return 0; /* success */
+ if (bcpup != au_dbwh(dentry))
+ goto out; /* success */
+
++ /*
++ * ENAMETOOLONG here means that if we allowed create such name, then it
++ * would not be able to removed in the future. So we don't allow such
++ * name here and we don't handle ENAMETOOLONG differently here.
++ */
+ wh_dentry = au_wh_lkup(h_parent, &dentry->d_name, br);
+
+out_unpin:
+ int type;
+ union {
+ struct {
-+ umode_t mode;
-+ bool want_excl;
++ umode_t mode;
++ bool want_excl;
++ bool try_aopen;
++ struct vfsub_aopen_args *aopen;
+ } c;
+ struct {
+ const char *symname;
+ int err, rerr;
+ aufs_bindex_t bstart;
+ unsigned char created;
++ const unsigned char try_aopen
++ = (arg->type == Creat && arg->u.c.try_aopen);
+ struct dentry *wh_dentry, *parent;
+ struct inode *h_dir;
++ struct super_block *sb;
++ struct au_branch *br;
+ /* to reuduce stack size */
+ struct {
+ struct au_dtime dt;
+ a->wr_dir_args.flags = AuWrDir_ADD_ENTRY;
+
+ parent = dentry->d_parent; /* dir inode is locked */
-+ err = aufs_read_lock(dentry, AuLock_DW | AuLock_GEN);
-+ if (unlikely(err))
-+ goto out_free;
++ if (!try_aopen) {
++ err = aufs_read_lock(dentry, AuLock_DW | AuLock_GEN);
++ if (unlikely(err))
++ goto out_free;
++ }
+ err = au_d_may_add(dentry);
+ if (unlikely(err))
+ goto out_unlock;
-+ di_write_lock_parent(parent);
++ if (!try_aopen)
++ di_write_lock_parent(parent);
+ wh_dentry = lock_hdir_lkup_wh(dentry, &a->dt, /*src_dentry*/NULL,
+ &a->pin, &a->wr_dir_args);
+ err = PTR_ERR(wh_dentry);
+ goto out_parent;
+
+ bstart = au_dbstart(dentry);
++ sb = dentry->d_sb;
++ br = au_sbr(sb, bstart);
+ a->h_path.dentry = au_h_dptr(dentry, bstart);
-+ a->h_path.mnt = au_sbr_mnt(dentry->d_sb, bstart);
++ a->h_path.mnt = au_br_mnt(br);
+ h_dir = au_pinned_h_dir(&a->pin);
+ switch (arg->type) {
+ case Creat:
-+ err = vfsub_create(h_dir, &a->h_path, arg->u.c.mode,
-+ arg->u.c.want_excl);
++ err = 0;
++ if (!try_aopen || !h_dir->i_op->atomic_open)
++ err = vfsub_create(h_dir, &a->h_path, arg->u.c.mode,
++ arg->u.c.want_excl);
++ else
++ err = vfsub_atomic_open(h_dir, a->h_path.dentry,
++ arg->u.c.aopen, br);
+ break;
+ case Symlink:
+ err = vfsub_symlink(h_dir, &a->h_path, arg->u.s.symname);
+ au_dtime_revert(&a->dt);
+ }
+
++ if (!err && try_aopen && !h_dir->i_op->atomic_open)
++ *arg->u.c.aopen->opened |= FILE_CREATED;
++
+ au_unpin(&a->pin);
+ dput(wh_dentry);
+
+out_parent:
-+ di_write_unlock(parent);
++ if (!try_aopen)
++ di_write_unlock(parent);
+out_unlock:
+ if (unlikely(err)) {
+ au_update_dbstart(dentry);
+ d_drop(dentry);
+ }
-+ aufs_read_unlock(dentry, AuLock_DW);
++ if (!try_aopen)
++ aufs_read_unlock(dentry, AuLock_DW);
+out_free:
+ kfree(a);
+out:
+ return add_simple(dir, dentry, &arg);
+}
+
++int au_aopen_or_create(struct inode *dir, struct dentry *dentry,
++ struct vfsub_aopen_args *aopen_args)
++{
++ struct simple_arg arg = {
++ .type = Creat,
++ .u.c = {
++ .mode = aopen_args->create_mode,
++ .want_excl = aopen_args->open_flag & O_EXCL,
++ .try_aopen = true,
++ .aopen = aopen_args
++ }
++ };
++ return add_simple(dir, dentry, &arg);
++}
++
+int aufs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
+{
+ int err;
+ dget(au_h_dptr(src_dentry, a->bsrc)));
+ dget(a->h_path.dentry);
+ au_set_h_dptr(dentry, a->bdst, NULL);
++ AuDbg("temporary d_inode...\n");
++ spin_lock(&dentry->d_lock);
+ dentry->d_inode = src_dentry->d_inode; /* tmp */
++ spin_unlock(&dentry->d_lock);
+ h_file = au_h_open_pre(dentry, a->bsrc, /*force_wr*/0);
+ if (IS_ERR(h_file))
+ err = PTR_ERR(h_file);
+ au_set_h_dptr(dentry, a->bdst,
+ a->h_path.dentry);
+ }
++ spin_lock(&dentry->d_lock);
+ dentry->d_inode = NULL; /* restore */
++ spin_unlock(&dentry->d_lock);
++ AuDbg("temporary d_inode...done\n");
+ au_set_h_dptr(dentry, a->bsrc, NULL);
+ au_set_dbend(dentry, bend);
+ } else {
+ goto out_revert;
+ }
+
++ au_dir_ts(dir, a->bdst);
+ dir->i_version++;
-+ if (au_ibstart(dir) == au_dbstart(dentry))
-+ au_cpup_attr_timesizes(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 2014-08-14 10:15:45.121942630 +0200
-@@ -0,0 +1,1142 @@
++++ linux/fs/aufs/i_op.c 2015-06-22 08:29:23.706757681 +0200
+@@ -0,0 +1,1445 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * - 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.'
++ * in this case, generic_permission() returns -EOPNOTSUPP.
+ */
+ if ((write_mask && !au_br_writable(brperm))
+ || (au_test_nfs(h_inode->i_sb) && S_ISDIR(h_inode->i_mode)
+ && write_mask && !(mask & MAY_READ))
+ || !h_inode->i_op->permission) {
+ /* AuLabel(generic_permission); */
++ /* AuDbg("get_acl %pf\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);
++ AuTraceErr(err);
+ } else {
+ /* AuLabel(h_inode->permission); */
+ err = h_inode->i_op->permission(h_inode, mask);
+
+ if (npositive) {
+ inode = au_new_inode(dentry, /*must_new*/0);
-+ ret = (void *)inode;
-+ }
-+ if (IS_ERR(inode)) {
-+ inode = NULL;
-+ goto out_unlock;
++ if (IS_ERR(inode)) {
++ ret = (void *)inode;
++ inode = NULL;
++ goto out_unlock;
++ }
+ }
+
++ if (inode)
++ atomic_inc(&inode->i_count);
+ ret = d_splice_alias(inode, dentry);
+#if 0
+ if (unlikely(d_need_lookup(dentry))) {
+ spin_unlock(&dentry->d_lock);
+ } else
+#endif
-+ if (unlikely(IS_ERR(ret) && inode)) {
-+ ii_write_unlock(inode);
-+ iput(inode);
-+ inode = NULL;
++ if (inode) {
++ if (!IS_ERR(ret)) {
++ iput(inode);
++ if (ret && ret != dentry)
++ ii_write_unlock(inode);
++ } else {
++ ii_write_unlock(inode);
++ iput(inode);
++ inode = NULL;
++ }
+ }
+
+out_unlock:
+
+/* ---------------------------------------------------------------------- */
+
++struct aopen_node {
++ struct hlist_node hlist;
++ struct file *file, *h_file;
++};
++
++static int au_do_aopen(struct inode *inode, struct file *file)
++{
++ struct au_sphlhead *aopen;
++ struct aopen_node *node;
++ struct au_do_open_args args = {
++ .no_lock = 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)
++ if (node->file == file) {
++ args.h_file = node->h_file;
++ break;
++ }
++ spin_unlock(&aopen->spin);
++ /* AuDebugOn(!args.h_file); */
++
++ return au_do_open(file, &args);
++}
++
++static int aufs_atomic_open(struct inode *dir, struct dentry *dentry,
++ struct file *file, unsigned int open_flag,
++ umode_t create_mode, int *opened)
++{
++ int err, h_opened = *opened;
++ struct dentry *parent;
++ struct dentry *d;
++ struct au_sphlhead *aopen;
++ struct vfsub_aopen_args args = {
++ .open_flag = open_flag,
++ .create_mode = create_mode,
++ .opened = &h_opened
++ };
++ struct aopen_node aopen_node = {
++ .file = file
++ };
++
++ IMustLock(dir);
++ AuDbg("open_flag 0x%x\n", open_flag);
++ AuDbgDentry(dentry);
++
++ err = 0;
++ if (!au_di(dentry)) {
++ d = aufs_lookup(dir, dentry, /*flags*/0);
++ if (IS_ERR(d)) {
++ err = PTR_ERR(d);
++ goto out;
++ } else if (d) {
++ /*
++ * obsoleted dentry found.
++ * another error will be returned later.
++ */
++ d_drop(d);
++ dput(d);
++ AuDbgDentry(d);
++ }
++ AuDbgDentry(dentry);
++ }
++
++ if (d_is_positive(dentry)
++ || d_unhashed(dentry)
++ || d_unlinked(dentry)
++ || !(open_flag & O_CREAT))
++ goto out_no_open;
++
++ err = aufs_read_lock(dentry, AuLock_DW | AuLock_FLUSH | AuLock_GEN);
++ if (unlikely(err))
++ goto out;
++
++ parent = dentry->d_parent; /* dir is locked */
++ di_write_lock_parent(parent);
++ err = au_lkup_dentry(dentry, /*bstart*/0, /*type*/0);
++ if (unlikely(err))
++ goto out_unlock;
++
++ AuDbgDentry(dentry);
++ if (d_is_positive(dentry))
++ goto out_unlock;
++
++ args.file = get_empty_filp();
++ err = PTR_ERR(args.file);
++ if (IS_ERR(args.file))
++ goto out_unlock;
++
++ args.file->f_flags = file->f_flags;
++ err = au_aopen_or_create(dir, dentry, &args);
++ AuTraceErr(err);
++ AuDbgFile(args.file);
++ if (unlikely(err < 0)) {
++ if (h_opened & FILE_OPENED)
++ fput(args.file);
++ else
++ put_filp(args.file);
++ goto out_unlock;
++ }
++
++ /* some filesystems don't set FILE_CREATED while succeeded? */
++ *opened |= FILE_CREATED;
++ if (h_opened & FILE_OPENED)
++ aopen_node.h_file = args.file;
++ else {
++ put_filp(args.file);
++ args.file = NULL;
++ }
++ aopen = &au_sbi(dir->i_sb)->si_aopen;
++ au_sphl_add(&aopen_node.hlist, aopen);
++ err = finish_open(file, dentry, au_do_aopen, opened);
++ au_sphl_del(&aopen_node.hlist, 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);
++ AuDbgDentry(dentry);
++ if (unlikely(err))
++ goto out;
++out_no_open:
++ if (!err && !(*opened & FILE_CREATED)) {
++ AuLabel(out_no_open);
++ dget(dentry);
++ err = finish_no_open(file, dentry);
++ }
++out:
++ AuDbg("%pd%s%s\n", dentry,
++ (*opened & FILE_CREATED) ? " created" : "",
++ (*opened & FILE_OPENED) ? " opened" : "");
++ AuTraceErr(err);
++ return err;
++}
++
++
++/* ---------------------------------------------------------------------- */
++
+static int au_wr_dir_cpup(struct dentry *dentry, struct dentry *parent,
+ const unsigned char add_entry, aufs_bindex_t bcpup,
+ aufs_bindex_t bstart)
+ h_parent = au_h_dptr(parent, bcpup);
+ h_dir = h_parent->d_inode;
+ mutex_lock_nested(&h_dir->i_mutex, AuLsc_I_PARENT);
-+ err = au_lkup_neg(dentry, bcpup,
-+ au_ftest_wrdir(add_entry, TMP_WHENTRY));
++ err = au_lkup_neg(dentry, bcpup, /*wh*/0);
+ /* todo: no unlock here */
+ mutex_unlock(&h_dir->i_mutex);
+
+ aufs_bindex_t bcpup, bstart, src_bstart;
+ const unsigned char add_entry
+ = au_ftest_wrdir(args->flags, ADD_ENTRY)
-+ | au_ftest_wrdir(args->flags, TMP_WHENTRY)
+ | au_ftest_wrdir(args->flags, TMPFILE);
+ struct super_block *sb;
+ struct dentry *parent;
+ au_hn_imtx_unlock(p->hdir);
+}
+
-+static int au_pin_hdir_lock(struct au_pin *p)
++int au_pin_hdir_lock(struct au_pin *p)
+{
+ int err;
+
+ * for ->setattr(), ia->ia_file is passed from ftruncate only.
+ */
+/* todo: consolidate with do_refresh() and simple_reval_dpath() */
-+static int au_reval_for_attr(struct dentry *dentry, unsigned int sigen)
++int au_reval_for_attr(struct dentry *dentry, unsigned int sigen)
+{
+ int err;
+ struct inode *inode;
+ return err;
+}
+
-+#define AuIcpup_DID_CPUP 1
-+#define au_ftest_icpup(flags, name) ((flags) & AuIcpup_##name)
-+#define au_fset_icpup(flags, name) \
-+ do { (flags) |= AuIcpup_##name; } while (0)
-+#define au_fclr_icpup(flags, name) \
-+ do { (flags) &= ~AuIcpup_##name; } while (0)
-+
-+struct au_icpup_args {
-+ unsigned char flags;
-+ unsigned char pin_flags;
-+ aufs_bindex_t btgt;
-+ unsigned int udba;
-+ struct au_pin pin;
-+ struct path h_path;
-+ struct inode *h_inode;
-+};
-+
-+static int au_pin_and_icpup(struct dentry *dentry, struct iattr *ia,
-+ struct au_icpup_args *a)
++int au_pin_and_icpup(struct dentry *dentry, struct iattr *ia,
++ struct au_icpup_args *a)
+{
+ int err;
+ loff_t sz;
+ .flags = 0
+ };
+
-+ bstart = au_dbstart(dentry);
-+ inode = dentry->d_inode;
-+ if (S_ISDIR(inode->i_mode))
++ if (d_is_dir(dentry))
+ au_fset_wrdir(wr_dir_args.flags, ISDIR);
+ /* plink or hi_wh() case */
++ bstart = au_dbstart(dentry);
++ inode = dentry->d_inode;
+ ibstart = au_ibstart(inode);
+ if (bstart != ibstart && !au_test_ro(inode->i_sb, ibstart, inode))
+ wr_dir_args.force_btgt = ibstart;
+
+ a->h_path.dentry = au_h_dptr(dentry, bstart);
+ a->h_inode = a->h_path.dentry->d_inode;
-+ mutex_lock_nested(&a->h_inode->i_mutex, AuLsc_I_CHILD);
+ sz = -1;
-+ if ((ia->ia_valid & ATTR_SIZE) && ia->ia_size < i_size_read(a->h_inode))
-+ sz = ia->ia_size;
-+ mutex_unlock(&a->h_inode->i_mutex);
++ if (ia && (ia->ia_valid & ATTR_SIZE)) {
++ mutex_lock_nested(&a->h_inode->i_mutex, AuLsc_I_CHILD);
++ if (ia->ia_size < i_size_read(a->h_inode))
++ sz = ia->ia_size;
++ mutex_unlock(&a->h_inode->i_mutex);
++ }
+
+ hi_wh = NULL;
+ if (au_ftest_icpup(a->flags, DID_CPUP) && d_unlinked(dentry)) {
+
+ if (ia->ia_valid & ATTR_FILE) {
+ /* currently ftruncate(2) only */
-+ AuDebugOn(!S_ISREG(inode->i_mode));
++ AuDebugOn(!d_is_reg(dentry));
+ file = ia->ia_file;
+ err = au_reval_and_lock_fdi(file, au_reopen_nondir, /*wlock*/1);
+ if (unlikely(err))
+ return err;
+}
+
++#if IS_ENABLED(CONFIG_AUFS_XATTR) || IS_ENABLED(CONFIG_FS_POSIX_ACL)
++static int au_h_path_to_set_attr(struct dentry *dentry,
++ struct au_icpup_args *a, struct path *h_path)
++{
++ int err;
++ struct super_block *sb;
++
++ sb = dentry->d_sb;
++ a->udba = au_opt_udba(sb);
++ /* no d_unlinked(), to set UDBA_NONE for root */
++ if (d_unhashed(dentry))
++ a->udba = AuOpt_UDBA_NONE;
++ if (a->udba != AuOpt_UDBA_NONE) {
++ AuDebugOn(IS_ROOT(dentry));
++ err = au_reval_for_attr(dentry, au_sigen(sb));
++ if (unlikely(err))
++ goto out;
++ }
++ err = au_pin_and_icpup(dentry, /*ia*/NULL, a);
++ if (unlikely(err < 0))
++ goto out;
++
++ h_path->dentry = a->h_path.dentry;
++ h_path->mnt = au_sbr_mnt(sb, a->btgt);
++
++out:
++ return err;
++}
++
++ssize_t au_srxattr(struct dentry *dentry, struct au_srxattr *arg)
++{
++ int err;
++ struct path h_path;
++ struct super_block *sb;
++ struct au_icpup_args *a;
++ struct inode *inode, *h_inode;
++
++ inode = dentry->d_inode;
++ IMustLock(inode);
++
++ err = -ENOMEM;
++ a = kzalloc(sizeof(*a), GFP_NOFS);
++ if (unlikely(!a))
++ goto out;
++
++ sb = dentry->d_sb;
++ err = si_read_lock(sb, AuLock_FLUSH | AuLock_NOPLM);
++ if (unlikely(err))
++ goto out_kfree;
++
++ h_path.dentry = NULL; /* silence gcc */
++ di_write_lock_child(dentry);
++ err = au_h_path_to_set_attr(dentry, a, &h_path);
++ if (unlikely(err))
++ goto out_di;
++
++ mutex_unlock(&a->h_inode->i_mutex);
++ switch (arg->type) {
++ case AU_XATTR_SET:
++ err = vfsub_setxattr(h_path.dentry,
++ arg->u.set.name, arg->u.set.value,
++ arg->u.set.size, arg->u.set.flags);
++ break;
++ case AU_XATTR_REMOVE:
++ err = vfsub_removexattr(h_path.dentry, arg->u.remove.name);
++ break;
++ case AU_ACL_SET:
++ err = -EOPNOTSUPP;
++ h_inode = h_path.dentry->d_inode;
++ if (h_inode->i_op->set_acl)
++ err = h_inode->i_op->set_acl(h_inode,
++ arg->u.acl_set.acl,
++ arg->u.acl_set.type);
++ break;
++ }
++ if (!err)
++ au_cpup_attr_timesizes(inode);
++
++ au_unpin(&a->pin);
++ if (unlikely(err))
++ au_update_dbstart(dentry);
++
++out_di:
++ di_write_unlock(dentry);
++ si_read_unlock(sb);
++out_kfree:
++ kfree(a);
++out:
++ AuTraceErr(err);
++ return err;
++}
++#endif
++
+static void au_refresh_iattr(struct inode *inode, struct kstat *st,
+ unsigned int nlink)
+{
+ spin_unlock(&inode->i_lock);
+}
+
-+static int aufs_getattr(struct vfsmount *mnt __maybe_unused,
-+ struct dentry *dentry, struct kstat *st)
++/*
++ * common routine for aufs_getattr() and aufs_getxattr().
++ * returns zero or negative (an error).
++ * @dentry will be read-locked in success.
++ */
++int au_h_path_getattr(struct dentry *dentry, int force, struct path *h_path)
+{
+ int err;
+ unsigned int mnt_flags, sigen;
++ unsigned char udba_none;
+ aufs_bindex_t bindex;
-+ unsigned char udba_none, positive;
+ struct super_block *sb, *h_sb;
+ struct inode *inode;
-+ struct path h_path;
+
++ h_path->mnt = NULL;
++ h_path->dentry = NULL;
++
++ err = 0;
+ sb = dentry->d_sb;
-+ inode = dentry->d_inode;
-+ err = si_read_lock(sb, AuLock_FLUSH | AuLock_NOPLM);
-+ if (unlikely(err))
-+ goto out;
+ mnt_flags = au_mntflags(sb);
+ udba_none = !!au_opt_test(mnt_flags, UDBA_NONE);
+
+ if (!err) {
+ di_read_lock_child(dentry, AuLock_IR);
+ err = au_dbrange_test(dentry);
-+ if (unlikely(err))
-+ goto out_unlock;
++ if (unlikely(err)) {
++ di_read_unlock(dentry, AuLock_IR);
++ goto out;
++ }
+ } else {
+ AuDebugOn(IS_ROOT(dentry));
+ di_write_lock_child(dentry);
+ err = au_dbrange_test(dentry);
+ if (!err)
+ err = au_reval_for_attr(dentry, sigen);
-+ di_downgrade_lock(dentry, AuLock_IR);
-+ if (unlikely(err))
-+ goto out_unlock;
++ if (!err)
++ di_downgrade_lock(dentry, AuLock_IR);
++ else {
++ di_write_unlock(dentry);
++ goto out;
++ }
+ }
+ } else
+ di_read_lock_child(dentry, AuLock_IR);
+
++ inode = dentry->d_inode;
+ bindex = au_ibstart(inode);
-+ h_path.mnt = au_sbr_mnt(sb, bindex);
-+ h_sb = h_path.mnt->mnt_sb;
-+ if (!au_test_fs_bad_iattr(h_sb) && udba_none)
-+ goto out_fill; /* success */
++ h_path->mnt = au_sbr_mnt(sb, bindex);
++ h_sb = h_path->mnt->mnt_sb;
++ if (!force
++ && !au_test_fs_bad_iattr(h_sb)
++ && udba_none)
++ goto out; /* success */
+
-+ h_path.dentry = NULL;
+ if (au_dbstart(dentry) == bindex)
-+ h_path.dentry = dget(au_h_dptr(dentry, bindex));
++ h_path->dentry = au_h_dptr(dentry, bindex);
+ else if (au_opt_test(mnt_flags, PLINK) && au_plink_test(inode)) {
-+ h_path.dentry = au_plink_lkup(inode, bindex);
-+ if (IS_ERR(h_path.dentry))
-+ goto out_fill; /* pretending success */
++ h_path->dentry = au_plink_lkup(inode, bindex);
++ if (IS_ERR(h_path->dentry))
++ /* pretending success */
++ h_path->dentry = NULL;
++ else
++ dput(h_path->dentry);
+ }
-+ /* illegally overlapped or something */
++
++out:
++ return err;
++}
++
++static int aufs_getattr(struct vfsmount *mnt __maybe_unused,
++ struct dentry *dentry, struct kstat *st)
++{
++ int err;
++ unsigned char positive;
++ struct path h_path;
++ struct inode *inode;
++ struct super_block *sb;
++
++ inode = dentry->d_inode;
++ sb = dentry->d_sb;
++ err = si_read_lock(sb, AuLock_FLUSH | AuLock_NOPLM);
++ if (unlikely(err))
++ goto out;
++ err = au_h_path_getattr(dentry, /*force*/0, &h_path);
++ if (unlikely(err))
++ goto out_si;
+ if (unlikely(!h_path.dentry))
++ /* illegally overlapped or something */
+ goto out_fill; /* pretending success */
+
+ positive = !!h_path.dentry->d_inode;
+ if (positive)
+ err = vfs_getattr(&h_path, st);
-+ dput(h_path.dentry);
+ if (!err) {
+ if (positive)
+ au_refresh_iattr(inode, st,
+ goto out_fill; /* success */
+ }
+ AuTraceErr(err);
-+ goto out_unlock;
++ goto out_di;
+
+out_fill:
+ generic_fillattr(inode, st);
-+out_unlock:
++out_di:
+ di_read_unlock(dentry, AuLock_IR);
++out_si:
+ si_read_unlock(sb);
+out:
+ AuTraceErr(err);
+
+struct inode_operations aufs_symlink_iop = {
+ .permission = aufs_permission,
++#ifdef CONFIG_FS_POSIX_ACL
++ .get_acl = aufs_get_acl,
++ .set_acl = aufs_set_acl, /* unsupport for symlink? */
++#endif
++
+ .setattr = aufs_setattr,
+ .getattr = aufs_getattr,
+
++#ifdef CONFIG_AUFS_XATTR
++ .setxattr = aufs_setxattr,
++ .getxattr = aufs_getxattr,
++ .listxattr = aufs_listxattr,
++ .removexattr = aufs_removexattr,
++#endif
++
+ .readlink = aufs_readlink,
+ .follow_link = aufs_follow_link,
+ .put_link = aufs_put_link,
+ .rename = aufs_rename,
+
+ .permission = aufs_permission,
++#ifdef CONFIG_FS_POSIX_ACL
++ .get_acl = aufs_get_acl,
++ .set_acl = aufs_set_acl,
++#endif
++
+ .setattr = aufs_setattr,
+ .getattr = aufs_getattr,
+
-+ .update_time = aufs_update_time,
-+ /* no support for atomic_open() */
++#ifdef CONFIG_AUFS_XATTR
++ .setxattr = aufs_setxattr,
++ .getxattr = aufs_getxattr,
++ .listxattr = aufs_listxattr,
++ .removexattr = aufs_removexattr,
++#endif
+
++ .update_time = aufs_update_time,
++ .atomic_open = aufs_atomic_open,
+ .tmpfile = aufs_tmpfile
+};
+
+struct inode_operations aufs_iop = {
+ .permission = aufs_permission,
++#ifdef CONFIG_FS_POSIX_ACL
++ .get_acl = aufs_get_acl,
++ .set_acl = aufs_set_acl,
++#endif
++
+ .setattr = aufs_setattr,
+ .getattr = aufs_getattr,
+
++#ifdef CONFIG_AUFS_XATTR
++ .setxattr = aufs_setxattr,
++ .getxattr = aufs_getxattr,
++ .listxattr = aufs_listxattr,
++ .removexattr = aufs_removexattr,
++#endif
++
+ .update_time = aufs_update_time
+};
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 2014-08-14 10:15:45.121942630 +0200
-@@ -0,0 +1,507 @@
++++ linux/fs/aufs/i_op_del.c 2015-06-22 08:27:37.884168534 +0200
+@@ -0,0 +1,506 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ d_drop(dentry);
+ inode->i_ctime = dir->i_ctime;
+
-+ if (au_ibstart(dir) == bindex)
-+ au_cpup_attr_timesizes(dir);
++ au_dir_ts(dir, bindex);
+ dir->i_version++;
+}
+
+ inode = dentry->d_inode;
+ IMustLock(inode);
+ err = -EISDIR;
-+ if (unlikely(S_ISDIR(inode->i_mode)))
++ if (unlikely(d_is_dir(dentry)))
+ goto out_unlock; /* possible? */
+
+ bstart = au_dbstart(dentry);
+ inode = dentry->d_inode;
+ IMustLock(inode);
+ err = -ENOTDIR;
-+ if (unlikely(!S_ISDIR(inode->i_mode)))
++ if (unlikely(!d_is_dir(dentry)))
+ goto out_unlock; /* possible? */
+
+ err = -ENOMEM;
+}
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 2014-08-14 10:15:45.128609525 +0200
-@@ -0,0 +1,1034 @@
++++ linux/fs/aufs/i_op_ren.c 2015-06-22 08:27:37.884168534 +0200
+@@ -0,0 +1,1015 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, 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_MNT_WRITE (1 << 4)
+#define AuRen_DT_DSTDIR (1 << 5)
+#define AuRen_DIROPQ (1 << 6)
-+#define AuRen_CPUP (1 << 7)
+#define au_ftest_ren(flags, name) ((flags) & AuRen_##name)
+#define au_fset_ren(flags, name) \
+ do { (flags) |= AuRen_##name; } while (0)
+ RevertFailure("rename %pd", a->src_dentry);
+}
+
-+static void au_ren_rev_cpup(int err, struct au_ren_args *a)
-+{
-+ int rerr;
-+
-+ a->h_path.dentry = a->dst_h_dentry;
-+ /* no delegation since it is just created */
-+ rerr = vfsub_unlink(a->dst_h_dir, &a->h_path, /*delegated*/NULL,
-+ /*force*/0);
-+ au_set_h_dptr(a->src_dentry, a->btgt, NULL);
-+ au_set_dbstart(a->src_dentry, a->src_bstart);
-+ if (rerr)
-+ RevertFailure("unlink %pd", a->dst_h_dentry);
-+}
-+
+static void au_ren_rev_whtmp(int err, struct au_ren_args *a)
+{
+ int rerr;
+ if (au_ftest_ren(a->flags, DIROPQ))
+ au_ren_rev_diropq(err, a);
+out_rename:
-+ if (!au_ftest_ren(a->flags, CPUP))
-+ au_ren_rev_rename(err, a);
-+ else
-+ au_ren_rev_cpup(err, a);
++ au_ren_rev_rename(err, a);
+ dput(a->h_dst);
+out_whtmp:
+ if (a->thargs)
+ au_cpup_attr_nlink(dir, /*force*/1);
+ }
+
-+ if (au_ibstart(dir) == a->btgt)
-+ au_cpup_attr_timesizes(dir);
++ au_dir_ts(dir, a->btgt);
+
+ if (au_ftest_ren(a->flags, ISSAMEDIR))
+ return;
+ dir->i_version++;
+ if (au_ftest_ren(a->flags, ISDIR))
+ au_cpup_attr_nlink(dir, /*force*/1);
-+ if (au_ibstart(dir) == a->btgt)
-+ au_cpup_attr_timesizes(dir);
++ au_dir_ts(dir, a->btgt);
+}
+
+static void au_ren_refresh(struct au_ren_args *a)
+
+ err = -ENOTDIR;
+ flags = AuLock_FLUSH | AuLock_NOPLM | AuLock_GEN;
-+ if (S_ISDIR(a->src_inode->i_mode)) {
++ if (d_is_dir(a->src_dentry)) {
+ au_fset_ren(a->flags, ISDIR);
-+ if (unlikely(a->dst_inode && !S_ISDIR(a->dst_inode->i_mode)))
++ if (unlikely(d_is_positive(a->dst_dentry)
++ && !d_is_dir(a->dst_dentry)))
+ goto out_free;
+ err = aufs_read_and_write_lock2(a->dst_dentry, a->src_dentry,
+ AuLock_DIR | flags);
+}
diff -urN /usr/share/empty/fs/aufs/Kconfig linux/fs/aufs/Kconfig
--- /usr/share/empty/fs/aufs/Kconfig 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/Kconfig 2014-08-14 10:15:45.118609182 +0200
-@@ -0,0 +1,177 @@
++++ linux/fs/aufs/Kconfig 2015-06-22 08:27:37.874168290 +0200
+@@ -0,0 +1,185 @@
+config AUFS_FS
+ tristate "Aufs (Advanced multi layered unification filesystem) support"
+ help
+ /* typedef unsigned long/int __kernel_ino_t */
+ /* alpha and s390x are int */
+
++config AUFS_XATTR
++ bool "support for XATTR/EA (including Security Labels)"
++ help
++ If your branch fs supports XATTR/EA and you want to make them
++ available in aufs too, then enable this opsion and specify the
++ branch attributes for EA.
++ See detail in aufs.5.
++
+config AUFS_FHSM
+ bool "File-based Hierarchical Storage Management"
+ 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 2014-01-30 21:10:02.850815069 +0100
++++ linux/fs/aufs/loop.c 2015-06-22 08:29:23.706757681 +0200
@@ -0,0 +1,145 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ if (!backing_file)
+ return 0;
+
-+ h_adding = backing_file->f_dentry;
++ h_adding = backing_file->f_path.dentry;
+ /*
+ * h_adding can be local NFS.
+ * in this case aufs cannot detect the loop.
+}
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 2014-01-30 21:10:02.850815069 +0100
++++ linux/fs/aufs/loop.h 2015-06-22 08:27:37.884168534 +0200
@@ -0,0 +1,52 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, 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 2014-01-30 21:10:02.850815069 +0100
-@@ -0,0 +1,54 @@
++++ linux/fs/aufs/magic.mk 2015-06-22 08:27:37.884168534 +0200
+@@ -0,0 +1,30 @@
+
+# defined in ${srctree}/fs/fuse/inode.c
+# tristate
+ccflags-y += -DFUSE_SUPER_MAGIC=0x65735546
+endif
+
-+# defined in ${srctree}/fs/ocfs2/ocfs2_fs.h
-+# tristate
-+ifdef CONFIG_OCFS2_FS
-+ccflags-y += -DOCFS2_SUPER_MAGIC=0x7461636f
-+endif
-+
-+# defined in ${srctree}/fs/ocfs2/dlm/userdlm.h
-+# tristate
-+ifdef CONFIG_OCFS2_FS_O2CB
-+ccflags-y += -DDLMFS_MAGIC=0x76a9f425
-+endif
-+
-+# defined in ${srctree}/fs/cifs/cifsfs.c
-+# tristate
-+ifdef CONFIG_CIFS_FS
-+ccflags-y += -DCIFS_MAGIC_NUMBER=0xFF534D42
-+endif
-+
+# defined in ${srctree}/fs/xfs/xfs_sb.h
+# tristate
+ifdef CONFIG_XFS_FS
+ccflags-y += -DCONFIGFS_MAGIC=0x62656570
+endif
+
-+# defined in ${srctree}/fs/9p/v9fs.h
-+# tristate
-+ifdef CONFIG_9P_FS
-+ccflags-y += -DV9FS_MAGIC=0x01021997
-+endif
-+
+# defined in ${srctree}/fs/ubifs/ubifs.h
+# tristate
+ifdef CONFIG_UBIFS_FS
+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 2014-08-14 10:15:45.118609182 +0200
-@@ -0,0 +1,42 @@
++++ linux/fs/aufs/Makefile 2015-06-22 08:27:37.874168290 +0200
+@@ -0,0 +1,44 @@
+
+include ${src}/magic.mk
+ifeq (${CONFIG_AUFS_FS},m)
+aufs-$(CONFIG_AUFS_HNOTIFY) += hnotify.o
+aufs-$(CONFIG_AUFS_HFSNOTIFY) += hfsnotify.o
+aufs-$(CONFIG_AUFS_EXPORT) += export.o
++aufs-$(CONFIG_AUFS_XATTR) += xattr.o
++aufs-$(CONFIG_FS_POSIX_ACL) += posix_acl.o
+aufs-$(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 2014-08-14 10:15:45.128609525 +0200
++++ linux/fs/aufs/module.c 2015-06-22 08:27:37.884168534 +0200
@@ -0,0 +1,210 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+module_exit(aufs_exit);
diff -urN /usr/share/empty/fs/aufs/module.h linux/fs/aufs/module.h
--- /usr/share/empty/fs/aufs/module.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/module.h 2014-01-30 21:10:02.850815069 +0100
++++ linux/fs/aufs/module.h 2015-06-22 08:27:37.884168534 +0200
@@ -0,0 +1,104 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, 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 2014-08-14 10:15:45.128609525 +0200
-@@ -0,0 +1,657 @@
++++ linux/fs/aufs/mvdown.c 2015-06-22 08:27:37.884168534 +0200
+@@ -0,0 +1,694 @@
+/*
-+ * Copyright (C) 2011-2014 Junjiro R. Okajima
++ * Copyright (C) 2011-2015 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ struct dentry *h_parent;
+ struct au_hinode *hdir;
+ struct inode *h_dir, *h_inode;
++ struct au_pin pin;
+ } info[AUFS_MVDOWN_NARRAY];
+
+ struct aufs_mvdown mvdown;
+ struct super_block *sb;
+ aufs_bindex_t bopq, bwh, bfound;
+ unsigned char rename_lock;
-+ struct au_pin pin;
+};
+
+#define mvd_errno mvdown.au_errno
+#define mvd_hdir_src info[AUFS_MVDOWN_UPPER].hdir
+#define mvd_h_src_dir info[AUFS_MVDOWN_UPPER].h_dir
+#define mvd_h_src_inode info[AUFS_MVDOWN_UPPER].h_inode
++#define mvd_pin_src info[AUFS_MVDOWN_UPPER].pin
+
+#define mvd_h_dst_sb info[AUFS_MVDOWN_LOWER].h_sb
+#define mvd_h_dst_parent info[AUFS_MVDOWN_LOWER].h_parent
+#define mvd_hdir_dst info[AUFS_MVDOWN_LOWER].hdir
+#define mvd_h_dst_dir info[AUFS_MVDOWN_LOWER].h_dir
+#define mvd_h_dst_inode info[AUFS_MVDOWN_LOWER].h_inode
++#define mvd_pin_dst info[AUFS_MVDOWN_LOWER].pin
+
+#define AU_MVD_PR(flag, ...) do { \
+ if (flag) \
+
+ a->mvd_h_src_sb = au_sbr_sb(a->sb, a->mvd_bsrc);
+ a->mvd_h_dst_sb = au_sbr_sb(a->sb, a->mvd_bdst);
++ err = au_pin(&a->mvd_pin_dst, a->dentry, a->mvd_bdst,
++ au_opt_udba(a->sb),
++ AuPin_MNT_WRITE | AuPin_DI_LOCKED);
++ AuTraceErr(err);
++ if (unlikely(err)) {
++ AU_MVD_PR(dmsg, "pin_dst failed\n");
++ goto out;
++ }
++
+ if (a->mvd_h_src_sb != a->mvd_h_dst_sb) {
+ a->rename_lock = 0;
-+ err = au_pin(&a->pin, a->dentry, a->mvd_bdst,
-+ au_opt_udba(a->sb),
-+ AuPin_MNT_WRITE | AuPin_DI_LOCKED);
-+ if (!err) {
-+ a->mvd_h_src_dir = a->mvd_h_src_parent->d_inode;
-+ mutex_lock_nested(&a->mvd_h_src_dir->i_mutex,
-+ AuLsc_I_PARENT3);
-+ } else
-+ AU_MVD_PR(dmsg, "pin failed\n");
-+ goto out;
++ au_pin_init(&a->mvd_pin_src, a->dentry, a->mvd_bsrc,
++ AuLsc_DI_PARENT, AuLsc_I_PARENT3,
++ au_opt_udba(a->sb),
++ AuPin_MNT_WRITE | AuPin_DI_LOCKED);
++ err = au_do_pin(&a->mvd_pin_src);
++ AuTraceErr(err);
++ a->mvd_h_src_dir = a->mvd_h_src_parent->d_inode;
++ if (unlikely(err)) {
++ AU_MVD_PR(dmsg, "pin_src failed\n");
++ goto out_dst;
++ }
++ goto out; /* success */
+ }
+
-+ err = 0;
+ a->rename_lock = 1;
++ au_pin_hdir_unlock(&a->mvd_pin_dst);
++ err = au_pin(&a->mvd_pin_src, a->dentry, a->mvd_bsrc,
++ au_opt_udba(a->sb),
++ AuPin_MNT_WRITE | AuPin_DI_LOCKED);
++ AuTraceErr(err);
++ a->mvd_h_src_dir = a->mvd_h_src_parent->d_inode;
++ if (unlikely(err)) {
++ AU_MVD_PR(dmsg, "pin_src failed\n");
++ au_pin_hdir_lock(&a->mvd_pin_dst);
++ goto out_dst;
++ }
++ au_pin_hdir_unlock(&a->mvd_pin_src);
+ h_trap = vfsub_lock_rename(a->mvd_h_src_parent, a->mvd_hdir_src,
+ a->mvd_h_dst_parent, a->mvd_hdir_dst);
+ if (h_trap) {
+ err = (h_trap != a->mvd_h_dst_parent);
+ }
+ BUG_ON(err); /* it should never happen */
++ if (unlikely(a->mvd_h_src_dir != au_pinned_h_dir(&a->mvd_pin_src))) {
++ err = -EBUSY;
++ AuTraceErr(err);
++ vfsub_unlock_rename(a->mvd_h_src_parent, a->mvd_hdir_src,
++ a->mvd_h_dst_parent, a->mvd_hdir_dst);
++ au_pin_hdir_lock(&a->mvd_pin_src);
++ au_unpin(&a->mvd_pin_src);
++ au_pin_hdir_lock(&a->mvd_pin_dst);
++ goto out_dst;
++ }
++ goto out; /* success */
+
++out_dst:
++ au_unpin(&a->mvd_pin_dst);
+out:
+ AuTraceErr(err);
+ return err;
+
+static void au_do_unlock(const unsigned char dmsg, struct au_mvd_args *a)
+{
-+ if (!a->rename_lock) {
-+ mutex_unlock(&a->mvd_h_src_dir->i_mutex);
-+ au_unpin(&a->pin);
-+ } else
++ if (!a->rename_lock)
++ au_unpin(&a->mvd_pin_src);
++ else {
+ vfsub_unlock_rename(a->mvd_h_src_parent, a->mvd_hdir_src,
+ a->mvd_h_dst_parent, a->mvd_hdir_dst);
++ au_pin_hdir_lock(&a->mvd_pin_src);
++ au_unpin(&a->mvd_pin_src);
++ au_pin_hdir_lock(&a->mvd_pin_dst);
++ }
++ au_unpin(&a->mvd_pin_dst);
+}
+
+/* copy-down the file */
+ .bdst = a->mvd_bdst,
+ .bsrc = a->mvd_bsrc,
+ .len = -1,
-+ .pin = &a->pin,
++ .pin = &a->mvd_pin_dst,
+ .flags = AuCpup_DTIME | AuCpup_HOPEN
+ };
+
+
+/*
+ * unlink the topmost h_dentry
-+ * Note: the target file MAY be modified by UDBA between this mutex_unlock() and
-+ * mutex_lock() in vfs_unlink(). in this case, such changes may be lost.
+ */
+static int au_do_unlink(const unsigned char dmsg, struct au_mvd_args *a)
+{
+ if (unlikely(err))
+ goto out_unlock;
+
++ AuDbg("%pd2, 0x%x, %d --> %d\n",
++ a->dentry, a->mvdown.flags, a->mvd_bsrc, a->mvd_bdst);
+ if (find_lower_writable(a) < 0)
+ a->mvdown.flags |= AUFS_MVDOWN_BOTTOM;
+
+ err = 0;
+ plinked = !!au_opt_test(au_mntflags(a->sb), PLINK);
+ if (au_dbstart(a->dentry) == a->mvd_bsrc
-+ && d_count(a->dentry) == 1
++ && au_dcount(a->dentry) == 1
+ && atomic_read(&a->inode->i_count) == 1
+ /* && a->mvd_h_src_inode->i_nlink == 1 */
+ && (!plinked || !au_plink_test(a->inode))
+
+ err = -EBUSY;
+ AU_MVD_PR(dmsg,
-+ "b%d, d{b%d, c%u?}, i{c%d?, l%u}, hi{l%u}, p{%d, %d}\n",
-+ a->mvd_bsrc, au_dbstart(a->dentry), d_count(a->dentry),
++ "b%d, d{b%d, c%d?}, i{c%d?, l%u}, hi{l%u}, p{%d, %d}\n",
++ a->mvd_bsrc, au_dbstart(a->dentry), au_dcount(a->dentry),
+ atomic_read(&a->inode->i_count), a->inode->i_nlink,
+ a->mvd_h_src_inode->i_nlink,
+ plinked, plinked ? au_plink_test(a->inode) : 0);
+ if (unlikely(err))
+ goto out_parent;
+
-+ AuDbgDentry(dentry);
-+ AuDbgInode(args->inode);
+ err = au_do_mvdown(dmsg, args);
+ if (unlikely(err))
+ goto out_parent;
-+ AuDbgDentry(dentry);
-+ AuDbgInode(args->inode);
+
+ au_cpup_attr_timesizes(args->dir);
+ au_cpup_attr_timesizes(args->inode);
+}
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 2014-08-14 10:15:45.128609525 +0200
-@@ -0,0 +1,1790 @@
++++ linux/fs/aufs/opts.c 2015-06-22 08:29:23.710091096 +0200
+@@ -0,0 +1,1854 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+
+enum {
+ Opt_br,
-+ Opt_add, Opt_del, Opt_mod, Opt_reorder, Opt_append, Opt_prepend,
-+ Opt_idel, Opt_imod, Opt_ireorder,
-+ Opt_dirwh, Opt_rdcache, Opt_rdblk, Opt_rdhash, Opt_rendir,
++ Opt_add, Opt_del, Opt_mod, Opt_append, Opt_prepend,
++ Opt_idel, Opt_imod,
++ Opt_dirwh, Opt_rdcache, Opt_rdblk, Opt_rdhash,
+ Opt_rdblk_def, Opt_rdhash_def,
-+ Opt_xino, Opt_zxino, Opt_noxino,
++ Opt_xino, Opt_noxino,
+ Opt_trunc_xino, Opt_trunc_xino_v, Opt_notrunc_xino,
+ Opt_trunc_xino_path, Opt_itrunc_xino,
+ Opt_trunc_xib, Opt_notrunc_xib,
+ Opt_plink, Opt_noplink, Opt_list_plink,
+ Opt_udba,
+ Opt_dio, Opt_nodio,
-+ /* Opt_lock, Opt_unlock, */
-+ Opt_cmd, Opt_cmd_args,
+ Opt_diropq_a, Opt_diropq_w,
+ Opt_warn_perm, Opt_nowarn_perm,
+ Opt_wbr_copyup, Opt_wbr_create,
+ Opt_verbose, Opt_noverbose,
+ Opt_sum, Opt_nosum, Opt_wsum,
+ Opt_dirperm1, Opt_nodirperm1,
++ Opt_acl, Opt_noacl,
+ Opt_tail, Opt_ignore, Opt_ignore_silent, Opt_err
+};
+
+ {Opt_dirperm1, "dirperm1"},
+ {Opt_nodirperm1, "nodirperm1"},
+
-+ {Opt_rendir, "rendir=%d"},
-+
+ {Opt_refrof, "refrof"},
+ {Opt_norefrof, "norefrof"},
+
+ {Opt_wbr_copyup, "copyup=%s"},
+ {Opt_wbr_copyup, "copyup_policy=%s"},
+
++ /* generic VFS flag */
++#ifdef CONFIG_FS_POSIX_ACL
++ {Opt_acl, "acl"},
++ {Opt_noacl, "noacl"},
++#else
++ {Opt_ignore_silent, "acl"},
++ {Opt_ignore_silent, "noacl"},
++#endif
++
+ /* internal use for the scripts */
+ {Opt_ignore_silent, "si=%s"},
+
+ int v;
+
+ v = *val;
++ if (!v)
++ goto out;
+ p = tbl;
-+ while (p->token) {
-+ if ((v & p->token) == p->token) {
++ while (p->pattern) {
++ if (p->token
++ && (v & p->token) == p->token) {
+ *val &= ~p->token;
+ return p->pattern;
+ }
+ p++;
+ }
++
++out:
+ return NULL;
+}
+
+ /* general */
+ {AuBrAttr_COO_REG, AUFS_BRATTR_COO_REG},
+ {AuBrAttr_COO_ALL, AUFS_BRATTR_COO_ALL},
++ /* 'unpin' attrib is meaningless since linux-3.18-rc1 */
+ {AuBrAttr_UNPIN, AUFS_BRATTR_UNPIN},
++#ifdef CONFIG_AUFS_FHSM
+ {AuBrAttr_FHSM, AUFS_BRATTR_FHSM},
++#endif
++#ifdef CONFIG_AUFS_XATTR
++ {AuBrAttr_ICEX, AUFS_BRATTR_ICEX},
++ {AuBrAttr_ICEX_SEC, AUFS_BRATTR_ICEX_SEC},
++ {AuBrAttr_ICEX_SYS, AUFS_BRATTR_ICEX_SYS},
++ {AuBrAttr_ICEX_TR, AUFS_BRATTR_ICEX_TR},
++ {AuBrAttr_ICEX_USR, AUFS_BRATTR_ICEX_USR},
++ {AuBrAttr_ICEX_OTH, AUFS_BRATTR_ICEX_OTH},
++#endif
+
+ /* ro/rr branch */
+ {AuBrRAttr_WH, AUFS_BRRATTR_WH},
+ const char *p;
+ char *q;
+
-+ sz = 0;
+ q = str->a;
+ *q = 0;
+ p = au_optstr(&perm, brattr);
+ } while (p);
+
+out:
-+ return sz;
++ return q - str->a;
+}
+
+static int noinline_for_stack br_perm_val(char *perm)
+ val &= ~AuBrRAttr_Mask;
+ break;
+ }
++
++ /*
++ * 'unpin' attrib becomes meaningless since linux-3.18-rc1, but aufs
++ * does not treat it as an error, just warning.
++ * this is a tiny guard for the user operation.
++ */
++ if (val & AuBrAttr_UNPIN) {
++ bad |= AuBrAttr_UNPIN;
++ val &= ~AuBrAttr_UNPIN;
++ }
++
+ if (unlikely(bad)) {
+ sz = au_do_optstr_br_attr(&attr, bad);
+ AuDebugOn(!sz);
+ u.xino_itrunc = &opt->xino_itrunc;
+ AuDbg("trunc_xino %d\n", u.xino_itrunc->bindex);
+ break;
-+
+ case Opt_noxino:
+ AuLabel(noxino);
+ break;
+ case Opt_fhsm_sec:
+ AuDbg("fhsm_sec %u\n", opt->fhsm_second);
+ break;
++ case Opt_acl:
++ AuLabel(acl);
++ break;
++ case Opt_noacl:
++ AuLabel(noacl);
++ break;
+ default:
+ BUG();
+ }
+ goto out;
+
+ err = -EINVAL;
-+ if (unlikely(file->f_dentry->d_sb == sb)) {
++ if (unlikely(file->f_path.dentry->d_sb == sb)) {
+ fput(file);
+ pr_err("%s must be outside\n", args[0].from);
+ goto out;
+ case Opt_wsum:
+ case Opt_rdblk_def:
+ case Opt_rdhash_def:
++ case Opt_acl:
++ case Opt_noacl:
+ err = 0;
+ opt->type = token;
+ break;
+ au_fclr_opts(opts->flags, TRUNC_XIB);
+ break;
+
++ case Opt_acl:
++ sb->s_flags |= MS_POSIXACL;
++ break;
++ case Opt_noacl:
++ sb->s_flags &= ~MS_POSIXACL;
++ break;
++
+ default:
+ err = 0;
+ break;
+ au_xino_brid_set(sb, -1);
+
+ /* safe d_parent access */
-+ parent = opt->xino.file->f_dentry->d_parent;
++ parent = opt->xino.file->f_path.dentry->d_parent;
+ root = sb->s_root;
+ bend = au_sbend(sb);
+ for (bindex = 0; bindex <= bend; bindex++) {
+ skip = 0;
+ h_dir = au_h_iptr(dir, bindex);
+ br = au_sbr(sb, bindex);
-+ do_free = 0;
+
++ if ((br->br_perm & AuBrAttr_ICEX)
++ && !h_dir->i_op->listxattr)
++ br->br_perm &= ~AuBrAttr_ICEX;
++#if 0
++ if ((br->br_perm & AuBrAttr_ICEX_SEC)
++ && (au_br_sb(br)->s_flags & MS_NOSEC))
++ br->br_perm &= ~AuBrAttr_ICEX_SEC;
++#endif
++
++ do_free = 0;
+ wbr = br->br_wbr;
+ if (wbr)
+ wbr_wh_read_lock(wbr);
+ }
+ }
+
-+ if (fhsm >= 2)
++ if (fhsm >= 2) {
+ au_fset_si(sbinfo, FHSM);
-+ else
++ for (bindex = bend; bindex >= 0; bindex--) {
++ br = au_sbr(sb, bindex);
++ if (au_br_fhsm(br->br_perm)) {
++ au_fhsm_set_bottom(sb, bindex);
++ break;
++ }
++ }
++ } else {
+ au_fclr_si(sbinfo, FHSM);
++ au_fhsm_set_bottom(sb, -1);
++ }
+
+ 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 2014-08-14 10:15:45.128609525 +0200
-@@ -0,0 +1,213 @@
++++ linux/fs/aufs/opts.h 2015-06-22 08:27:37.887501948 +0200
+@@ -0,0 +1,211 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, 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/path.h>
-+#include "branch.h"
+
+struct file;
+struct super_block;
+
+/* ---------------------------------------------------------------------- */
+
++/* opts.c */
+void au_optstr_br_perm(au_br_perm_str_t *str, int perm);
+const char *au_optstr_udba(int udba);
+const char *au_optstr_wbr_copyup(int wbr_copyup);
+
+unsigned int au_opt_udba(struct super_block *sb);
+
-+/* ---------------------------------------------------------------------- */
-+
+#endif /* __KERNEL__ */
+#endif /* __AUFS_OPTS_H__ */
diff -urN /usr/share/empty/fs/aufs/plink.c linux/fs/aufs/plink.c
--- /usr/share/empty/fs/aufs/plink.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/plink.c 2014-01-30 21:10:02.857481956 +0100
++++ linux/fs/aufs/plink.c 2015-06-22 08:27:37.887501948 +0200
@@ -0,0 +1,532 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+}
diff -urN /usr/share/empty/fs/aufs/poll.c linux/fs/aufs/poll.c
--- /usr/share/empty/fs/aufs/poll.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/poll.c 2014-01-30 21:10:02.857481956 +0100
-@@ -0,0 +1,55 @@
++++ linux/fs/aufs/poll.c 2015-06-22 08:29:23.710091096 +0200
+@@ -0,0 +1,52 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ unsigned int mask;
+ int err;
+ struct file *h_file;
-+ struct dentry *dentry;
+ struct super_block *sb;
+
+ /* We should pretend an error happened. */
+ mask = POLLERR /* | POLLIN | POLLOUT */;
-+ dentry = file->f_dentry;
-+ sb = dentry->d_sb;
++ sb = file->f_path.dentry->d_sb;
+ si_read_lock(sb, AuLock_FLUSH | AuLock_NOPLMW);
-+ err = au_reval_and_lock_fdi(file, au_reopen_nondir, /*wlock*/0);
-+ if (unlikely(err))
++
++ h_file = au_read_pre(file, /*keep_fi*/0);
++ err = PTR_ERR(h_file);
++ if (IS_ERR(h_file))
+ goto out;
+
+ /* it is not an error if h_file has no operation */
+ mask = DEFAULT_POLLMASK;
-+ h_file = au_hf_top(file);
+ if (h_file->f_op->poll)
+ mask = h_file->f_op->poll(h_file, wait);
-+
-+ di_read_unlock(dentry, AuLock_IR);
-+ fi_read_unlock(file);
++ fput(h_file); /* instead of au_read_post() */
+
+out:
+ si_read_unlock(sb);
+ AuTraceErr((int)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 2015-06-22 08:27:37.887501948 +0200
+@@ -0,0 +1,99 @@
++/*
++ * Copyright (C) 2014-2015 Junjiro R. Okajima
++ *
++ * This program, 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/>.
++ */
++
++/*
++ * posix acl operations
++ */
++
++#include <linux/fs.h>
++#include <linux/posix_acl.h>
++#include "aufs.h"
++
++struct posix_acl *aufs_get_acl(struct inode *inode, int type)
++{
++ struct posix_acl *acl;
++ int err;
++ aufs_bindex_t bindex;
++ struct inode *h_inode;
++ struct super_block *sb;
++
++ acl = NULL;
++ sb = inode->i_sb;
++ si_read_lock(sb, AuLock_FLUSH);
++ ii_read_lock_child(inode);
++ if (!(sb->s_flags & MS_POSIXACL))
++ goto out;
++
++ bindex = au_ibstart(inode);
++ h_inode = au_h_iptr(inode, bindex);
++ if (unlikely(!h_inode
++ || ((h_inode->i_mode & S_IFMT)
++ != (inode->i_mode & S_IFMT)))) {
++ err = au_busy_or_stale();
++ acl = ERR_PTR(err);
++ goto out;
++ }
++
++ /* always topmost only */
++ acl = get_acl(h_inode, type);
++
++out:
++ ii_read_unlock(inode);
++ si_read_unlock(sb);
++
++ AuTraceErrPtr(acl);
++ return acl;
++}
++
++int aufs_set_acl(struct inode *inode, struct posix_acl *acl, int type)
++{
++ int err;
++ ssize_t ssz;
++ struct dentry *dentry;
++ struct au_srxattr arg = {
++ .type = AU_ACL_SET,
++ .u.acl_set = {
++ .acl = acl,
++ .type = type
++ },
++ };
++
++ mutex_lock(&inode->i_mutex);
++ if (inode->i_ino == AUFS_ROOT_INO)
++ dentry = dget(inode->i_sb->s_root);
++ else {
++ dentry = d_find_alias(inode);
++ if (!dentry)
++ dentry = d_find_any_alias(inode);
++ if (!dentry) {
++ pr_warn("cannot handle this inode, "
++ "please report to aufs-users ML\n");
++ err = -ENOENT;
++ goto out;
++ }
++ }
++
++ ssz = au_srxattr(dentry, &arg);
++ dput(dentry);
++ err = ssz;
++ if (ssz >= 0)
++ err = 0;
++
++out:
++ mutex_unlock(&inode->i_mutex);
++ return err;
++}
diff -urN /usr/share/empty/fs/aufs/procfs.c linux/fs/aufs/procfs.c
--- /usr/share/empty/fs/aufs/procfs.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/procfs.c 2014-01-30 21:10:02.857481956 +0100
++++ linux/fs/aufs/procfs.c 2015-06-22 08:27:37.887501948 +0200
@@ -0,0 +1,169 @@
+/*
-+ * Copyright (C) 2010-2014 Junjiro R. Okajima
++ * Copyright (C) 2010-2015 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+}
diff -urN /usr/share/empty/fs/aufs/rdu.c linux/fs/aufs/rdu.c
--- /usr/share/empty/fs/aufs/rdu.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/rdu.c 2014-01-30 21:10:02.857481956 +0100
++++ linux/fs/aufs/rdu.c 2015-06-22 08:29:23.710091096 +0200
@@ -0,0 +1,388 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, 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 bend;
+ struct au_rdu_arg arg = {
+ .ctx = {
-+ .actor = au_diractor(au_rdu_fill)
++ .actor = au_rdu_fill
+ }
+ };
+ struct dentry *dentry;
+ if (unlikely(err))
+ goto out;
+
-+ dentry = file->f_dentry;
++ dentry = file->f_path.dentry;
+ inode = dentry->d_inode;
+#if 1
+ mutex_lock(&inode->i_mutex);
+ err = 0;
+ nent = rdu->nent;
+ u = &rdu->ent;
-+ sb = file->f_dentry->d_sb;
++ sb = file->f_path.dentry->d_sb;
+ si_read_lock(sb, AuLock_FLUSH);
+ while (nent-- > 0) {
+ /* unnecessary to support mmap_sem since this is a dir */
+#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 2014-08-14 10:15:45.128609525 +0200
++++ linux/fs/aufs/rwsem.h 2015-06-22 08:27:37.887501948 +0200
@@ -0,0 +1,191 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+#endif /* __AUFS_RWSEM_H__ */
diff -urN /usr/share/empty/fs/aufs/sbinfo.c linux/fs/aufs/sbinfo.c
--- /usr/share/empty/fs/aufs/sbinfo.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/sbinfo.c 2014-08-14 10:15:45.128609525 +0200
-@@ -0,0 +1,353 @@
++++ linux/fs/aufs/sbinfo.c 2015-06-22 08:27:37.887501948 +0200
+@@ -0,0 +1,354 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, 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_xino_brid = -1;
+ /* leave si_xib_last_pindex and si_xib_next_bit */
+
++ au_sphl_init(&sbinfo->si_aopen);
++
+ sbinfo->si_rdcache = msecs_to_jiffies(AUFS_RDCACHE_DEF * MSEC_PER_SEC);
+ sbinfo->si_rdblk = AUFS_RDBLK_DEF;
+ sbinfo->si_rdhash = AUFS_RDHASH_DEF;
+ sbinfo->si_sb = sb;
+ sb->s_fs_info = sbinfo;
+ si_pid_set(sb);
-+ au_debug_sbinfo_init(sbinfo);
+ return 0; /* success */
+
+out_br:
+}
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 2014-01-30 21:10:02.857481956 +0100
++++ linux/fs/aufs/spl.h 2015-06-22 08:27:37.887501948 +0200
@@ -0,0 +1,111 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, 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_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 2014-08-14 10:15:45.131942973 +0200
-@@ -0,0 +1,1004 @@
++++ linux/fs/aufs/super.c 2015-06-22 08:29:23.710091096 +0200
+@@ -0,0 +1,1007 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, 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/mm.h>
-+#include <linux/module.h>
+#include <linux/seq_file.h>
+#include <linux/statfs.h>
+#include <linux/vmalloc.h>
-+#include <linux/writeback.h>
+#include "aufs.h"
+
+/*
+ hdp = au_di(sb->s_root)->di_hdentry;
+ h_root = hdp[0 + bindex].hd_dentry;
+ }
-+ d = f->f_dentry;
++ d = f->f_path.dentry;
+ name = &d->d_name;
+ /* safe ->d_parent because the file is unlinked */
+ if (d->d_parent == h_root
+ seq_printf(m, "," #str "=%u", val); \
+} while (0)
+
-+ /* lock free root dinfo */
+ sb = dentry->d_sb;
++ if (sb->s_flags & MS_POSIXACL)
++ seq_puts(m, ",acl");
++
++ /* lock free root dinfo */
+ si_noflush_read_lock(sb);
+ sbinfo = au_sbi(sb);
+ seq_printf(m, ",si=%lx", sysaufs_si_id(sbinfo));
+ sb->s_d_op = &aufs_dop;
+ sb->s_magic = AUFS_SUPER_MAGIC;
+ sb->s_maxbytes = 0;
++ sb->s_stack_depth = 1;
+ au_export_init(sb);
++ /* au_xattr_init(sb); */
+
+ err = alloc_root(sb);
+ if (unlikely(err)) {
+};
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 2014-08-14 10:15:45.131942973 +0200
-@@ -0,0 +1,642 @@
++++ linux/fs/aufs/super.h 2015-06-22 08:27:37.887501948 +0200
+@@ -0,0 +1,638 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ wait_queue_head_t fhsm_wqh;
+ atomic_t fhsm_readable;
+
-+ /* only this is protected by si_rwsem */
++ /* these are protected by si_rwsem */
+ unsigned long fhsm_expire;
++ aufs_bindex_t fhsm_bottom;
+#endif
+};
+
+ /* branch management */
+ unsigned int si_generation;
+
-+ /* see above flags */
++ /* see AuSi_ flags */
+ unsigned char au_si_status;
+
+ aufs_bindex_t si_bend;
+ atomic_t si_xigen_next;
+#endif
+
++ /* dirty trick to suppoer atomic_open */
++ struct au_sphlhead si_aopen;
++
+ /* vdir parameters */
+ unsigned long si_rdcache; /* max cache time in jiffies */
+ unsigned int si_rdblk; /* deblk size */
+ */
+ unsigned int si_dirwh;
+
-+ /*
-+ * rename(2) a directory with all children.
-+ */
-+ /* reserved for future use */
-+ /* int si_rendir; */
-+
+ /* pseudo_link list */
+ struct au_sphlhead si_plink[AuPlink_NHASH];
+ wait_queue_head_t si_plink_wq;
+void au_fhsm_wrote_all(struct super_block *sb, int force);
+int au_fhsm_fd(struct super_block *sb, int oflags);
+int au_fhsm_br_alloc(struct au_branch *br);
++void au_fhsm_set_bottom(struct super_block *sb, aufs_bindex_t bindex);
+void au_fhsm_fin(struct super_block *sb);
+void au_fhsm_init(struct au_sbinfo *sbinfo);
+void au_fhsm_set(struct au_sbinfo *sbinfo, unsigned int sec);
+ int force)
+AuStubVoid(au_fhsm_wrote_all, struct super_block *sb, int force)
+AuStub(int, au_fhsm_fd, return -EOPNOTSUPP, struct super_block *sb, int oflags)
-+AuStub(pid_t, au_fhsm_pid, return 0, struct au_fhsm *fhsm);
-+AuStubInt0(au_fhsm_br_alloc, struct au_branch *br);
++AuStub(pid_t, au_fhsm_pid, return 0, struct au_fhsm *fhsm)
++AuStubInt0(au_fhsm_br_alloc, struct au_branch *br)
++AuStubVoid(au_fhsm_set_bottom, struct super_block *sb, aufs_bindex_t bindex)
+AuStubVoid(au_fhsm_fin, struct super_block *sb)
+AuStubVoid(au_fhsm_init, struct au_sbinfo *sbinfo)
+AuStubVoid(au_fhsm_set, struct au_sbinfo *sbinfo, unsigned int sec)
+AuStubInt0(au_xigen_new, struct inode *inode)
+AuStubInt0(au_xigen_set, struct super_block *sb, struct file *base)
+AuStubVoid(au_xigen_clr, struct super_block *sb)
-+static inline int au_busy_or_stale(void)
-+{
-+ return -EBUSY;
-+}
++AuStub(int, au_busy_or_stale, return -EBUSY, void)
+#endif /* CONFIG_AUFS_EXPORT */
+
+/* ---------------------------------------------------------------------- */
+#endif /* CONFIG_AUFS_MAGIC_SYSRQ */
+#else
+AuStubVoid(au_sbilist_init, void)
-+AuStubVoid(au_sbilist_add, struct super_block*)
-+AuStubVoid(au_sbilist_del, struct super_block*)
++AuStubVoid(au_sbilist_add, struct super_block *sb)
++AuStubVoid(au_sbilist_del, struct super_block *sb)
+AuStubVoid(au_sbilist_lock, void)
+AuStubVoid(au_sbilist_unlock, void)
+#define AuGFP_SBILIST GFP_NOFS
+static inline void dbgaufs_si_null(struct au_sbinfo *sbinfo)
+{
+ /*
-+ * This function is a dynamic '__init' fucntion actually,
++ * This function is a dynamic '__init' function actually,
+ * so the tiny check for si_rwsem is unnecessary.
+ */
+ /* AuRwMustWriteLock(&sbinfo->si_rwsem); */
+ bit = si_pid_bit();
+ if (bit < PID_MAX_DEFAULT)
+ return test_bit(bit, au_sbi(sb)->au_si_pid.bitmap);
-+ else
-+ return si_pid_test_slow(sb);
++ return si_pid_test_slow(sb);
+}
+
+static inline void si_pid_set(struct super_block *sb)
+ return locked;
+}
+
-+#if 0 /* unused */
++#if 0 /* reserved */
+static inline int si_read_trylock(struct super_block *sb, int flags)
+{
+ if (au_ftest_lock(flags, FLUSH))
+ __si_read_unlock(sb);
+}
+
-+#if 0 /* unused */
++#if 0 /* reserved */
+static inline int si_write_trylock(struct super_block *sb, int flags)
+{
+ if (au_ftest_lock(flags, FLUSH))
+ __si_write_unlock(sb);
+}
+
-+#if 0 /* unused */
++#if 0 /* reserved */
+static inline void si_downgrade_lock(struct super_block *sb)
+{
+ __si_downgrade_lock(sb);
+#endif /* __AUFS_SUPER_H__ */
diff -urN /usr/share/empty/fs/aufs/sysaufs.c linux/fs/aufs/sysaufs.c
--- /usr/share/empty/fs/aufs/sysaufs.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/sysaufs.c 2014-01-30 21:10:02.857481956 +0100
++++ linux/fs/aufs/sysaufs.c 2015-06-22 08:27:37.887501948 +0200
@@ -0,0 +1,104 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+}
diff -urN /usr/share/empty/fs/aufs/sysaufs.h linux/fs/aufs/sysaufs.h
--- /usr/share/empty/fs/aufs/sysaufs.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/sysaufs.h 2014-08-14 10:15:45.131942973 +0200
-@@ -0,0 +1,107 @@
++++ linux/fs/aufs/sysaufs.h 2015-06-22 08:27:37.887501948 +0200
+@@ -0,0 +1,101 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, 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 sysaufs_attr_group NULL
+
+AuStubInt0(sysaufs_si_xi_path, struct seq_file *seq, struct super_block *sb)
-+
-+static inline
-+ssize_t sysaufs_si_show(struct kobject *kobj, struct attribute *attr,
-+ char *buf)
-+{
-+ return 0;
-+}
-+
++AuStub(ssize_t, sysaufs_si_show, return 0, struct kobject *kobj,
++ struct attribute *attr, char *buf)
+AuStubVoid(sysaufs_br_init, struct au_branch *br)
+AuStubVoid(sysaufs_brs_add, struct super_block *sb, aufs_bindex_t bindex)
+AuStubVoid(sysaufs_brs_del, struct super_block *sb, aufs_bindex_t bindex)
+#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 2014-08-14 10:15:45.131942973 +0200
++++ linux/fs/aufs/sysfs.c 2015-06-22 08:29:23.710091096 +0200
@@ -0,0 +1,372 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+
+long au_brinfo_ioctl(struct file *file, unsigned long arg)
+{
-+ return au_brinfo(file->f_dentry->d_sb, (void __user *)arg);
++ return au_brinfo(file->f_path.dentry->d_sb, (void __user *)arg);
+}
+
+#ifdef CONFIG_COMPAT
+long au_brinfo_compat_ioctl(struct file *file, unsigned long arg)
+{
-+ return au_brinfo(file->f_dentry->d_sb, compat_ptr(arg));
++ return au_brinfo(file->f_path.dentry->d_sb, compat_ptr(arg));
+}
+#endif
+
+}
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 2014-08-14 10:15:45.131942973 +0200
++++ linux/fs/aufs/sysrq.c 2015-06-22 08:27:37.887501948 +0200
@@ -0,0 +1,157 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+}
diff -urN /usr/share/empty/fs/aufs/vdir.c linux/fs/aufs/vdir.c
--- /usr/share/empty/fs/aufs/vdir.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/vdir.c 2014-08-14 10:15:45.131942973 +0200
-@@ -0,0 +1,889 @@
++++ linux/fs/aufs/vdir.c 2015-06-22 08:29:23.710091096 +0200
+@@ -0,0 +1,888 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, 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 *sb;
+ int err;
+
-+ sb = file->f_dentry->d_sb;
++ sb = file->f_path.dentry->d_sb;
+ SiMustAnyLock(sb);
+
+ err = -ENOMEM;
+ const unsigned char shwh = !!au_ftest_fillvdir(arg->flags, SHWH);
+
+ arg->err = 0;
-+ sb = arg->file->f_dentry->d_sb;
++ sb = arg->file->f_path.dentry->d_sb;
+ au_fset_fillvdir(arg->flags, CALLED);
+ /* smp_mb(); */
+ if (nlen <= AUFS_WH_PFX_LEN
+ || au_nhash_test_known_wh(&arg->whlist, name, nlen))
+ goto out; /* already exists or whiteouted */
+
-+ sb = arg->file->f_dentry->d_sb;
+ arg->err = au_ino(sb, arg->bindex, h_ino, d_type, &ino);
+ if (!arg->err) {
+ if (unlikely(nlen > AUFS_MAX_NAMELEN))
+ struct super_block *sb;
+
+ file = arg->file;
-+ sb = file->f_dentry->d_sb;
++ sb = file->f_path.dentry->d_sb;
+ SiMustAnyLock(sb);
+
+ rdhash = au_sbi(sb)->si_rdhash;
+ unsigned char do_read;
+ struct fillvdir_arg arg = {
+ .ctx = {
-+ .actor = au_diractor(fillvdir)
++ .actor = fillvdir
+ }
+ };
+ struct inode *inode;
+}
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 2014-08-14 10:16:04.515942371 +0200
-@@ -0,0 +1,782 @@
++++ linux/fs/aufs/vfsub.c 2015-06-22 08:29:23.710091096 +0200
+@@ -0,0 +1,846 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, 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/ima.h>
+#include <linux/namei.h>
+#include <linux/security.h>
+#include <linux/splice.h>
+ return file;
+}
+
++/*
++ * Ideally this function should call VFS:do_last() in order to keep all its
++ * checkings. But it is very hard for aufs to regenerate several VFS internal
++ * structure such as nameidata. This is a second (or third) best approach.
++ * cf. linux/fs/namei.c:do_last(), lookup_open() and atomic_open().
++ */
++int vfsub_atomic_open(struct inode *dir, struct dentry *dentry,
++ struct vfsub_aopen_args *args, struct au_branch *br)
++{
++ int err;
++ struct file *file = args->file;
++ /* copied from linux/fs/namei.c:atomic_open() */
++ struct dentry *const DENTRY_NOT_SET = (void *)-1UL;
++
++ IMustLock(dir);
++ AuDebugOn(!dir->i_op->atomic_open);
++
++ err = au_br_test_oflag(args->open_flag, br);
++ if (unlikely(err))
++ goto out;
++
++ args->file->f_path.dentry = DENTRY_NOT_SET;
++ args->file->f_path.mnt = au_br_mnt(br);
++ err = dir->i_op->atomic_open(dir, dentry, file, args->open_flag,
++ args->create_mode, args->opened);
++ if (err >= 0) {
++ /* some filesystems don't set FILE_CREATED while succeeded? */
++ if (*args->opened & FILE_CREATED)
++ fsnotify_create(dir, dentry);
++ } else
++ goto out;
++
++
++ if (!err) {
++ /* todo: call VFS:may_open() here */
++ err = open_check_o_direct(file);
++ /* todo: ima_file_check() too? */
++ if (!err && (args->open_flag & __FMODE_EXEC))
++ err = deny_write_access(file);
++ if (unlikely(err))
++ /* note that the file is created and still opened */
++ goto out;
++ }
++
++ atomic_inc(&br->br_count);
++ fsnotify_open(file);
++
++out:
++ return err;
++}
++
+int vfsub_kern_path(const char *name, unsigned int flags, struct path *path)
+{
+ int err;
+ if (unlikely(err))
+ goto out;
+
++ lockdep_off();
+ err = vfs_create(dir, path->dentry, mode, want_excl);
++ lockdep_on();
+ if (!err) {
+ struct path tmp = *path;
+ int did;
+ if (unlikely(err))
+ goto out;
+
++ lockdep_off();
+ err = vfs_symlink(dir, path->dentry, symname);
++ lockdep_on();
+ if (!err) {
+ struct path tmp = *path;
+ int did;
+ if (unlikely(err))
+ goto out;
+
++ lockdep_off();
+ err = vfs_mknod(dir, path->dentry, mode, dev);
++ lockdep_on();
+ if (!err) {
+ struct path tmp = *path;
+ int did;
+ if (unlikely(err))
+ goto out;
+
++ lockdep_off();
+ err = vfs_mkdir(dir, path->dentry, mode);
++ lockdep_on();
+ if (!err) {
+ struct path tmp = *path;
+ int did;
+
+ err = 0;
+ if (file->f_op->flush) {
-+ if (!au_test_nfs(file->f_dentry->d_sb))
++ if (!au_test_nfs(file->f_path.dentry->d_sb))
+ err = file->f_op->flush(file, id);
+ else {
+ lockdep_off();
+ int err, do_sio, wkq_err;
+
+ do_sio = au_test_h_perm_sio(dir, MAY_EXEC | MAY_WRITE);
-+ if (!do_sio)
++ if (!do_sio) {
++ lockdep_off();
+ err = vfsub_mkdir(dir, path, mode);
-+ else {
++ lockdep_on();
++ } else {
+ struct au_vfsub_mkdir_args args = {
+ .errp = &err,
+ .dir = dir,
+ int err, do_sio, wkq_err;
+
+ do_sio = au_test_h_perm_sio(dir, MAY_EXEC | MAY_WRITE);
-+ if (!do_sio)
++ if (!do_sio) {
++ lockdep_off();
+ err = vfsub_rmdir(dir, path);
-+ else {
++ lockdep_on();
++ } else {
+ struct au_vfsub_rmdir_args args = {
+ .errp = &err,
+ .dir = dir,
+
+ *a->errp = -EPERM;
+ if (!IS_IMMUTABLE(h_inode) && !IS_APPEND(h_inode)) {
++ lockdep_off();
+ *a->errp = notify_change(a->path->dentry, a->ia,
+ a->delegated_inode);
++ lockdep_on();
+ if (!*a->errp)
+ vfsub_update_h_iattr(a->path, /*did*/NULL); /*ignore*/
+ }
+ struct dentry *d = a->path->dentry;
+ struct inode *h_inode;
+ const int stop_sillyrename = (au_test_nfs(d->d_sb)
-+ && d_count(d) == 1);
++ && au_dcount(d) == 1);
+
+ IMustLock(a->dir);
+
+}
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 2014-08-14 10:15:45.131942973 +0200
-@@ -0,0 +1,284 @@
++++ linux/fs/aufs/vfsub.h 2015-06-22 08:29:23.710091096 +0200
+@@ -0,0 +1,286 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, 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/lglock.h>
+#include <linux/mount.h>
++#include <linux/xattr.h>
+#include "debug.h"
+
+/* copied from linux/fs/internal.h */
+/* todo: BAD approach!! */
+extern void __mnt_drop_write(struct vfsmount *);
+extern spinlock_t inode_sb_list_lock;
++extern int open_check_o_direct(struct file *f);
+
+/* ---------------------------------------------------------------------- */
+
+/* default MAX_LOCKDEP_SUBCLASSES(8) is not enough */
+/* reduce? gave up. */
+enum {
-+ AuLsc_I_Begin = I_MUTEX_NONDIR2, /* 4 */
++ AuLsc_I_Begin = I_MUTEX_PARENT2, /* 5 */
+ AuLsc_I_PARENT, /* lower inode, parent first */
+ AuLsc_I_PARENT2, /* copyup dirs */
+ AuLsc_I_PARENT3, /* copyup wh */
+int vfsub_update_h_iattr(struct path *h_path, int *did);
+struct file *vfsub_dentry_open(struct path *path, int flags);
+struct file *vfsub_filp_open(const char *path, int oflags, int mode);
++struct vfsub_aopen_args {
++ struct file *file;
++ unsigned int open_flag;
++ umode_t create_mode;
++ int *opened;
++};
++struct au_branch;
++int vfsub_atomic_open(struct inode *dir, struct dentry *dentry,
++ struct vfsub_aopen_args *args, struct au_branch *br);
+int vfsub_kern_path(const char *name, unsigned int flags, struct path *path);
+
+struct dentry *vfsub_lookup_one_len(const char *name, struct dentry *parent,
+ lockdep_on();
+}
+
++#if 0 /* reserved */
+static inline void vfsub_mnt_drop_write_file(struct file *file)
+{
+ lockdep_off();
+ mnt_drop_write_file(file);
+ lockdep_on();
+}
++#endif
+
+/* ---------------------------------------------------------------------- */
+
+int vfsub_flush(struct file *file, fl_owner_t id);
+int vfsub_iterate_dir(struct file *file, struct dir_context *ctx);
+
-+/* just for type-check */
-+static inline filldir_t au_diractor(int (*func)(struct dir_context *,
-+ const char *, int, loff_t, u64,
-+ unsigned))
-+{
-+ return (filldir_t)func;
-+}
-+
-+
+static inline loff_t vfsub_f_size_read(struct file *file)
+{
+ return i_size_read(file_inode(file));
+ return flags;
+}
+
++#if 0 /* reserved */
+static inline void vfsub_file_accessed(struct file *h_file)
+{
+ file_accessed(h_file);
+ vfsub_update_h_iattr(&h_file->f_path, /*did*/NULL); /*ignore*/
+}
++#endif
+
+static inline void vfsub_touch_atime(struct vfsmount *h_mnt,
+ struct dentry *h_dentry)
+static inline int vfsub_update_time(struct inode *h_inode, struct timespec *ts,
+ int flags)
+{
-+ return update_time(h_inode, ts, flags);
++ return generic_update_time(h_inode, ts, flags);
+ /* no vfsub_update_h_iattr() since we don't have struct path */
+}
+
+
+/* ---------------------------------------------------------------------- */
+
-+/* dirty workaround for strict type of fmode_t */
-+union vfsub_fmu {
-+ fmode_t fm;
-+ unsigned int ui;
-+};
++int vfsub_sio_mkdir(struct inode *dir, struct path *path, int mode);
++int vfsub_sio_rmdir(struct inode *dir, struct path *path);
++int vfsub_sio_notify_change(struct path *path, struct iattr *ia,
++ struct inode **delegated_inode);
++int vfsub_notify_change(struct path *path, struct iattr *ia,
++ struct inode **delegated_inode);
++int vfsub_unlink(struct inode *dir, struct path *path,
++ struct inode **delegated_inode, int force);
+
-+static inline unsigned int vfsub_fmode_to_uint(fmode_t fm)
++/* ---------------------------------------------------------------------- */
++
++static inline int vfsub_setxattr(struct dentry *dentry, const char *name,
++ const void *value, size_t size, int flags)
+{
-+ union vfsub_fmu u = {
-+ .fm = fm
-+ };
++ int err;
+
-+ BUILD_BUG_ON(sizeof(u.fm) != sizeof(u.ui));
++ lockdep_off();
++ err = vfs_setxattr(dentry, name, value, size, flags);
++ lockdep_on();
+
-+ return u.ui;
++ return err;
+}
+
-+static inline fmode_t vfsub_uint_to_fmode(unsigned int ui)
++static inline int vfsub_removexattr(struct dentry *dentry, const char *name)
+{
-+ union vfsub_fmu u = {
-+ .ui = ui
-+ };
-+
-+ return u.fm;
-+}
++ int err;
+
-+/* ---------------------------------------------------------------------- */
++ lockdep_off();
++ err = vfs_removexattr(dentry, name);
++ lockdep_on();
+
-+int vfsub_sio_mkdir(struct inode *dir, struct path *path, int mode);
-+int vfsub_sio_rmdir(struct inode *dir, struct path *path);
-+int vfsub_sio_notify_change(struct path *path, struct iattr *ia,
-+ struct inode **delegated_inode);
-+int vfsub_notify_change(struct path *path, struct iattr *ia,
-+ struct inode **delegated_inode);
-+int vfsub_unlink(struct inode *dir, struct path *path,
-+ struct inode **delegated_inode, int force);
++ return err;
++}
+
+#endif /* __KERNEL__ */
+#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 2014-08-14 10:15:45.131942973 +0200
++++ linux/fs/aufs/wbr_policy.c 2015-06-22 08:27:37.887501948 +0200
@@ -0,0 +1,765 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+};
diff -urN /usr/share/empty/fs/aufs/whout.c linux/fs/aufs/whout.c
--- /usr/share/empty/fs/aufs/whout.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/whout.c 2014-08-14 10:15:45.131942973 +0200
-@@ -0,0 +1,1056 @@
++++ linux/fs/aufs/whout.c 2015-06-22 08:29:23.710091096 +0200
+@@ -0,0 +1,1064 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ else
+ wh_dentry = au_sio_lkup_one(wh_name, h_parent);
+ err = PTR_ERR(wh_dentry);
-+ if (IS_ERR(wh_dentry))
++ if (IS_ERR(wh_dentry)) {
++ if (err == -ENAMETOOLONG)
++ err = 0;
+ goto out;
++ }
+
+ err = 0;
+ if (!wh_dentry->d_inode)
+ goto out_wh; /* success */
+
+ err = 1;
-+ if (S_ISREG(wh_dentry->d_inode->i_mode))
++ if (d_is_reg(wh_dentry))
+ goto out_wh; /* success */
+
+ err = -EIO;
+ err = PTR_ERR(h_path.dentry);
+ else {
+ if (h_path.dentry->d_inode
-+ && S_ISREG(h_path.dentry->d_inode->i_mode))
++ && d_is_reg(h_path.dentry))
+ err = do_unlink_wh(h_parent->d_inode, &h_path);
+ dput(h_path.dentry);
+ }
+ if (au_test_nfs(path->dentry->d_sb))
+ mode |= S_IXUGO;
+ err = vfsub_mkdir(h_dir, path, mode);
-+ } else if (S_ISDIR(path->dentry->d_inode->i_mode))
++ } else if (d_is_dir(path->dentry))
+ err = 0;
+ else
+ pr_err("unknown %pd exists\n", path->dentry);
+
+/*
+ * returns tri-state,
-+ * minus: error, caller should print the mesage
++ * minus: error, caller should print the message
+ * zero: succuess
-+ * plus: error, caller should NOT print the mesage
++ * plus: error, caller should NOT print the message
+ */
+static int au_wh_init_rw_nolink(struct dentry *h_root, struct au_wbr *wbr,
+ int do_plink, struct au_wh_base base[],
+ if (!base[AuBrWh_BASE].dentry->d_inode) {
+ h_path->dentry = base[AuBrWh_BASE].dentry;
+ err = vfsub_create(h_dir, h_path, WH_MASK, /*want_excl*/true);
-+ } else if (S_ISREG(base[AuBrWh_BASE].dentry->d_inode->i_mode))
++ } else if (d_is_reg(base[AuBrWh_BASE].dentry))
+ err = 0;
+ else
+ pr_err("unknown %pd2 exists\n", base[AuBrWh_BASE].dentry);
+ struct dentry *wh_dentry, struct au_nhash *whlist)
+{
+ int err;
++ unsigned int h_nlink;
+ struct path h_tmp;
+ struct inode *wh_inode, *h_dir;
+ struct au_branch *br;
+ if (!err) {
+ h_tmp.dentry = wh_dentry;
+ h_tmp.mnt = au_br_mnt(br);
++ h_nlink = h_dir->i_nlink;
+ err = vfsub_rmdir(h_dir, &h_tmp);
++ /* some fs doesn't change the parent nlink in some cases */
++ h_nlink -= h_dir->i_nlink;
+ }
+
+ if (!err) {
+ if (au_ibstart(dir) == bindex) {
+ /* todo: dir->i_mutex is necessary */
+ au_cpup_attr_timesizes(dir);
-+ vfsub_drop_nlink(dir);
++ if (h_nlink)
++ vfsub_drop_nlink(dir);
+ }
+ return 0; /* success */
+ }
+}
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 2014-08-14 10:15:45.131942973 +0200
++++ linux/fs/aufs/whout.h 2015-06-22 08:27:37.890835363 +0200
@@ -0,0 +1,85 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+
+/* whout.c */
+int au_wh_name_alloc(struct qstr *wh, const struct qstr *name);
-+struct au_branch;
+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 2014-08-14 10:16:04.515942371 +0200
++++ linux/fs/aufs/wkq.c 2015-06-22 08:27:37.890835363 +0200
@@ -0,0 +1,213 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, aufs is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+}
diff -urN /usr/share/empty/fs/aufs/wkq.h linux/fs/aufs/wkq.h
--- /usr/share/empty/fs/aufs/wkq.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux/fs/aufs/wkq.h 2014-01-30 21:10:02.860815399 +0100
++++ linux/fs/aufs/wkq.h 2015-06-22 08:27:37.890835363 +0200
@@ -0,0 +1,91 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, 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 /* __KERNEL__ */
+#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 2015-06-22 08:27:37.890835363 +0200
+@@ -0,0 +1,344 @@
++/*
++ * Copyright (C) 2014-2015 Junjiro R. Okajima
++ *
++ * This program, 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/>.
++ */
++
++/*
++ * handling xattr functions
++ */
++
++#include <linux/xattr.h>
++#include "aufs.h"
++
++static int au_xattr_ignore(int err, char *name, unsigned int ignore_flags)
++{
++ if (!ignore_flags)
++ goto out;
++ switch (err) {
++ case -ENOMEM:
++ case -EDQUOT:
++ goto out;
++ }
++
++ if ((ignore_flags & AuBrAttr_ICEX) == AuBrAttr_ICEX) {
++ err = 0;
++ goto out;
++ }
++
++#define cmp(brattr, prefix) do { \
++ if (!strncmp(name, XATTR_##prefix##_PREFIX, \
++ XATTR_##prefix##_PREFIX_LEN)) { \
++ if (ignore_flags & AuBrAttr_ICEX_##brattr) \
++ err = 0; \
++ goto out; \
++ } \
++ } while (0)
++
++ cmp(SEC, SECURITY);
++ cmp(SYS, SYSTEM);
++ cmp(TR, TRUSTED);
++ cmp(USR, USER);
++#undef cmp
++
++ if (ignore_flags & AuBrAttr_ICEX_OTH)
++ err = 0;
++
++out:
++ return err;
++}
++
++static const int au_xattr_out_of_list = AuBrAttr_ICEX_OTH << 1;
++
++static int au_do_cpup_xattr(struct dentry *h_dst, struct dentry *h_src,
++ char *name, char **buf, unsigned int ignore_flags,
++ unsigned int verbose)
++{
++ int err;
++ ssize_t ssz;
++ struct inode *h_idst;
++
++ ssz = vfs_getxattr_alloc(h_src, name, buf, 0, GFP_NOFS);
++ err = ssz;
++ if (unlikely(err <= 0)) {
++ if (err == -ENODATA
++ || (err == -EOPNOTSUPP
++ && ((ignore_flags & au_xattr_out_of_list)
++ || (au_test_nfs_noacl(h_src->d_inode)
++ && (!strcmp(name, XATTR_NAME_POSIX_ACL_ACCESS)
++ || !strcmp(name,
++ XATTR_NAME_POSIX_ACL_DEFAULT))))
++ ))
++ err = 0;
++ if (err && (verbose || au_debug_test()))
++ pr_err("%s, err %d\n", name, err);
++ goto out;
++ }
++
++ /* unlock it temporary */
++ h_idst = h_dst->d_inode;
++ mutex_unlock(&h_idst->i_mutex);
++ err = vfsub_setxattr(h_dst, name, *buf, ssz, /*flags*/0);
++ mutex_lock_nested(&h_idst->i_mutex, AuLsc_I_CHILD2);
++ if (unlikely(err)) {
++ if (verbose || au_debug_test())
++ pr_err("%s, err %d\n", name, err);
++ err = au_xattr_ignore(err, name, ignore_flags);
++ }
++
++out:
++ return err;
++}
++
++int au_cpup_xattr(struct dentry *h_dst, struct dentry *h_src, int ignore_flags,
++ unsigned int verbose)
++{
++ int err, unlocked, acl_access, acl_default;
++ ssize_t ssz;
++ struct inode *h_isrc, *h_idst;
++ char *value, *p, *o, *e;
++
++ /* try stopping to update the source inode while we are referencing */
++ /* there should not be the parent-child relationship between them */
++ h_isrc = h_src->d_inode;
++ h_idst = h_dst->d_inode;
++ mutex_unlock(&h_idst->i_mutex);
++ mutex_lock_nested(&h_isrc->i_mutex, AuLsc_I_CHILD);
++ mutex_lock_nested(&h_idst->i_mutex, AuLsc_I_CHILD2);
++ unlocked = 0;
++
++ /* some filesystems don't list POSIX ACL, for example tmpfs */
++ ssz = vfs_listxattr(h_src, NULL, 0);
++ err = ssz;
++ if (unlikely(err < 0)) {
++ AuTraceErr(err);
++ if (err == -ENODATA
++ || err == -EOPNOTSUPP)
++ err = 0; /* ignore */
++ goto out;
++ }
++
++ err = 0;
++ p = NULL;
++ o = NULL;
++ if (ssz) {
++ err = -ENOMEM;
++ p = kmalloc(ssz, GFP_NOFS);
++ o = p;
++ if (unlikely(!p))
++ goto out;
++ err = vfs_listxattr(h_src, p, ssz);
++ }
++ mutex_unlock(&h_isrc->i_mutex);
++ unlocked = 1;
++ AuDbg("err %d, ssz %zd\n", err, ssz);
++ if (unlikely(err < 0))
++ goto out_free;
++
++ err = 0;
++ e = p + ssz;
++ value = NULL;
++ acl_access = 0;
++ acl_default = 0;
++ while (!err && p < e) {
++ acl_access |= !strncmp(p, XATTR_NAME_POSIX_ACL_ACCESS,
++ sizeof(XATTR_NAME_POSIX_ACL_ACCESS) - 1);
++ acl_default |= !strncmp(p, XATTR_NAME_POSIX_ACL_DEFAULT,
++ sizeof(XATTR_NAME_POSIX_ACL_DEFAULT)
++ - 1);
++ err = au_do_cpup_xattr(h_dst, h_src, p, &value, ignore_flags,
++ verbose);
++ p += strlen(p) + 1;
++ }
++ AuTraceErr(err);
++ ignore_flags |= au_xattr_out_of_list;
++ if (!err && !acl_access) {
++ err = au_do_cpup_xattr(h_dst, h_src,
++ XATTR_NAME_POSIX_ACL_ACCESS, &value,
++ ignore_flags, verbose);
++ AuTraceErr(err);
++ }
++ if (!err && !acl_default) {
++ err = au_do_cpup_xattr(h_dst, h_src,
++ XATTR_NAME_POSIX_ACL_DEFAULT, &value,
++ ignore_flags, verbose);
++ AuTraceErr(err);
++ }
++
++ kfree(value);
++
++out_free:
++ kfree(o);
++out:
++ if (!unlocked)
++ mutex_unlock(&h_isrc->i_mutex);
++ AuTraceErr(err);
++ return err;
++}
++
++/* ---------------------------------------------------------------------- */
++
++enum {
++ AU_XATTR_LIST,
++ AU_XATTR_GET
++};
++
++struct au_lgxattr {
++ int type;
++ union {
++ struct {
++ char *list;
++ size_t size;
++ } list;
++ struct {
++ const char *name;
++ void *value;
++ size_t size;
++ } get;
++ } u;
++};
++
++static ssize_t au_lgxattr(struct dentry *dentry, struct au_lgxattr *arg)
++{
++ ssize_t err;
++ struct path h_path;
++ struct super_block *sb;
++
++ sb = dentry->d_sb;
++ err = si_read_lock(sb, AuLock_FLUSH | AuLock_NOPLM);
++ if (unlikely(err))
++ goto out;
++ err = au_h_path_getattr(dentry, /*force*/1, &h_path);
++ if (unlikely(err))
++ goto out_si;
++ if (unlikely(!h_path.dentry))
++ /* illegally overlapped or something */
++ goto out_di; /* pretending success */
++
++ /* always topmost entry only */
++ switch (arg->type) {
++ case AU_XATTR_LIST:
++ err = vfs_listxattr(h_path.dentry,
++ arg->u.list.list, arg->u.list.size);
++ break;
++ case AU_XATTR_GET:
++ err = vfs_getxattr(h_path.dentry,
++ arg->u.get.name, arg->u.get.value,
++ arg->u.get.size);
++ break;
++ }
++
++out_di:
++ di_read_unlock(dentry, AuLock_IR);
++out_si:
++ si_read_unlock(sb);
++out:
++ AuTraceErr(err);
++ return err;
++}
++
++ssize_t aufs_listxattr(struct dentry *dentry, char *list, size_t size)
++{
++ struct au_lgxattr arg = {
++ .type = AU_XATTR_LIST,
++ .u.list = {
++ .list = list,
++ .size = size
++ },
++ };
++
++ return au_lgxattr(dentry, &arg);
++}
++
++ssize_t aufs_getxattr(struct dentry *dentry, const char *name, void *value,
++ size_t size)
++{
++ struct au_lgxattr arg = {
++ .type = AU_XATTR_GET,
++ .u.get = {
++ .name = name,
++ .value = value,
++ .size = size
++ },
++ };
++
++ return au_lgxattr(dentry, &arg);
++}
++
++int aufs_setxattr(struct dentry *dentry, const char *name, const void *value,
++ size_t size, int flags)
++{
++ struct au_srxattr arg = {
++ .type = AU_XATTR_SET,
++ .u.set = {
++ .name = name,
++ .value = value,
++ .size = size,
++ .flags = flags
++ },
++ };
++
++ return au_srxattr(dentry, &arg);
++}
++
++int aufs_removexattr(struct dentry *dentry, const char *name)
++{
++ struct au_srxattr arg = {
++ .type = AU_XATTR_REMOVE,
++ .u.remove = {
++ .name = name
++ },
++ };
++
++ return au_srxattr(dentry, &arg);
++}
++
++/* ---------------------------------------------------------------------- */
++
++#if 0
++static size_t au_xattr_list(struct dentry *dentry, char *list, size_t list_size,
++ const char *name, size_t name_len, int type)
++{
++ return aufs_listxattr(dentry, list, list_size);
++}
++
++static int au_xattr_get(struct dentry *dentry, const char *name, void *buffer,
++ size_t size, int type)
++{
++ return aufs_getxattr(dentry, name, buffer, size);
++}
++
++static int au_xattr_set(struct dentry *dentry, const char *name,
++ const void *value, size_t size, int flags, int type)
++{
++ return aufs_setxattr(dentry, name, value, size, flags);
++}
++
++static const struct xattr_handler au_xattr_handler = {
++ /* no prefix, no flags */
++ .list = au_xattr_list,
++ .get = au_xattr_get,
++ .set = au_xattr_set
++ /* why no remove? */
++};
++
++static const struct xattr_handler *au_xattr_handlers[] = {
++ &au_xattr_handler
++};
++
++void au_xattr_init(struct super_block *sb)
++{
++ /* sb->s_xattr = au_xattr_handlers; */
++}
++#endif
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 2014-08-14 10:16:04.515942371 +0200
-@@ -0,0 +1,1316 @@
++++ linux/fs/aufs/xino.c 2015-06-22 08:29:23.710091096 +0200
+@@ -0,0 +1,1322 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, 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 0 /* reserved for future use */
+ if (err > 0)
-+ fsnotify_access(file->f_dentry);
++ fsnotify_access(file->f_path.dentry);
+#endif
+
+ return err;
+
+#if 0 /* reserved for future use */
+ if (err > 0)
-+ fsnotify_modify(file->f_dentry);
++ fsnotify_modify(file->f_path.dentry);
+#endif
+
+ return err;
+ struct path path;
+ int err;
+
-+ base = base_file->f_dentry;
++ base = base_file->f_path.dentry;
+ parent = base->d_parent; /* dir inode is locked */
+ dir = parent->d_inode;
+ IMustLock(dir);
+ ldir->hdir = au_hi(sb->s_root->d_inode, bindex);
+ au_hn_imtx_lock_nested(ldir->hdir, AuLsc_I_PARENT);
+ } else {
-+ ldir->parent = dget_parent(xino->f_dentry);
++ ldir->parent = dget_parent(xino->f_path.dentry);
+ ldir->mtx = &ldir->parent->d_inode->i_mutex;
+ mutex_lock_nested(ldir->mtx, AuLsc_I_PARENT);
+ }
+{
+ struct file *file;
+ struct dentry *h_parent, *d;
-+ struct inode *h_dir;
++ struct inode *h_dir, *inode;
+ int err;
+
+ /*
+ }
+
+ /* keep file count */
-+ h_parent = dget_parent(file->f_dentry);
++ err = 0;
++ inode = file_inode(file);
++ h_parent = dget_parent(file->f_path.dentry);
+ h_dir = h_parent->d_inode;
+ mutex_lock_nested(&h_dir->i_mutex, AuLsc_I_PARENT);
+ /* mnt_want_write() is unnecessary here */
+ /* no delegation since it is just created */
-+ err = vfsub_unlink(h_dir, &file->f_path, /*delegated*/NULL, /*force*/0);
++ if (inode->i_nlink)
++ err = vfsub_unlink(h_dir, &file->f_path, /*delegated*/NULL,
++ /*force*/0);
+ mutex_unlock(&h_dir->i_mutex);
+ dput(h_parent);
+ if (unlikely(err)) {
+ }
+
+ err = -EINVAL;
-+ d = file->f_dentry;
++ d = file->f_path.dentry;
+ if (unlikely(sb == d->d_sb)) {
+ if (!silent)
+ pr_err("%s must be outside\n", fname);
+
+ err = 0;
+ sbinfo = au_sbi(sb);
-+ parent = dget_parent(xino->file->f_dentry);
++ parent = dget_parent(xino->file->f_path.dentry);
+ if (remount) {
+ skip = 0;
-+ dname = &xino->file->f_dentry->d_name;
++ dname = &xino->file->f_path.dentry->d_name;
+ cur_xino = sbinfo->si_xib;
+ if (cur_xino) {
-+ cur_parent = dget_parent(cur_xino->f_dentry);
-+ cur_name = &cur_xino->f_dentry->d_name;
++ cur_parent = dget_parent(cur_xino->f_path.dentry);
++ cur_name = &cur_xino->f_path.dentry->d_name;
+ skip = (cur_parent == parent
+ && au_qstreq(dname, cur_name));
+ dput(cur_parent);
+
+ /* reset all */
+ AuIOErr("failed creating xino(%d).\n", err);
++ au_xigen_clr(sb);
++ xino_clear_xib(sb);
+
+out:
+ dput(parent);
+ file = au_xino_create(sb, AUFS_XINO_DEFPATH, /*silent*/0);
+ if (IS_ERR(file))
+ goto out;
-+ h_sb = file->f_dentry->d_sb;
++ h_sb = file->f_path.dentry->d_sb;
+ if (unlikely(au_test_fs_bad_xino(h_sb))) {
+ pr_err("xino doesn't support %s(%s)\n",
+ AUFS_XINO_DEFPATH, au_sbtype(h_sb));
+}
diff -urN /usr/share/empty/include/uapi/linux/aufs_type.h linux/include/uapi/linux/aufs_type.h
--- /usr/share/empty/include/uapi/linux/aufs_type.h 1970-01-01 01:00:00.000000000 +0100
-+++ linux/include/uapi/linux/aufs_type.h 2014-08-14 10:16:04.522609267 +0200
-@@ -0,0 +1,380 @@
++++ linux/include/uapi/linux/aufs_type.h 2015-06-22 08:29:23.710091096 +0200
+@@ -0,0 +1,419 @@
+/*
-+ * Copyright (C) 2005-2014 Junjiro R. Okajima
++ * Copyright (C) 2005-2015 Junjiro R. Okajima
+ *
+ * This program, 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 "3.16-20140811"
++#define AUFS_VERSION "3.x-rcN-20150622"
+
+/* todo? move this to linux-2.6.19/include/magic.h */
+#define AUFS_SUPER_MAGIC ('a' << 24 | 'u' << 16 | 'f' << 8 | 's')
+#define AUFS_BRATTR_COO_ALL "coo_all"
+#define AUFS_BRATTR_FHSM "fhsm"
+#define AUFS_BRATTR_UNPIN "unpin"
++#define AUFS_BRATTR_ICEX "icex"
++#define AUFS_BRATTR_ICEX_SEC "icexsec"
++#define AUFS_BRATTR_ICEX_SYS "icexsys"
++#define AUFS_BRATTR_ICEX_TR "icextr"
++#define AUFS_BRATTR_ICEX_USR "icexusr"
++#define AUFS_BRATTR_ICEX_OTH "icexoth"
+#define AUFS_BRRATTR_WH "wh"
+#define AUFS_BRWATTR_NLWH "nolwh"
+#define AUFS_BRWATTR_MOO "moo"
+
+#define AuBrAttr_FHSM (1 << 5) /* file-based hsm */
+#define AuBrAttr_UNPIN (1 << 6) /* rename-able top dir of
-+ branch */
-+
-+#define AuBrRAttr_WH (1 << 7) /* whiteout-able */
++ branch. meaningless since
++ linux-3.18-rc1 */
++
++/* ignore error in copying XATTR */
++#define AuBrAttr_ICEX_SEC (1 << 7)
++#define AuBrAttr_ICEX_SYS (1 << 8)
++#define AuBrAttr_ICEX_TR (1 << 9)
++#define AuBrAttr_ICEX_USR (1 << 10)
++#define AuBrAttr_ICEX_OTH (1 << 11)
++#define AuBrAttr_ICEX (AuBrAttr_ICEX_SEC \
++ | AuBrAttr_ICEX_SYS \
++ | AuBrAttr_ICEX_TR \
++ | AuBrAttr_ICEX_USR \
++ | AuBrAttr_ICEX_OTH)
++
++#define AuBrRAttr_WH (1 << 12) /* whiteout-able */
+#define AuBrRAttr_Mask AuBrRAttr_WH
+
-+#define AuBrWAttr_NoLinkWH (1 << 8) /* un-hardlinkable whiteouts */
-+#define AuBrWAttr_MOO (1 << 9) /* move-up on open */
++#define AuBrWAttr_NoLinkWH (1 << 13) /* un-hardlinkable whiteouts */
++#define AuBrWAttr_MOO (1 << 14) /* move-up on open */
+#define AuBrWAttr_Mask (AuBrWAttr_NoLinkWH | AuBrWAttr_MOO)
+
+#define AuBrAttr_CMOO_Mask (AuBrAttr_COO_Mask | AuBrWAttr_MOO)
+
++/* #warning test userspace */
+#ifdef __KERNEL__
+#ifndef CONFIG_AUFS_FHSM
+#undef AuBrAttr_FHSM
+#define AuBrAttr_FHSM 0
+#endif
++#ifndef CONFIG_AUFS_XATTR
++#undef AuBrAttr_ICEX
++#define AuBrAttr_ICEX 0
++#undef AuBrAttr_ICEX_SEC
++#define AuBrAttr_ICEX_SEC 0
++#undef AuBrAttr_ICEX_SYS
++#define AuBrAttr_ICEX_SYS 0
++#undef AuBrAttr_ICEX_TR
++#define AuBrAttr_ICEX_TR 0
++#undef AuBrAttr_ICEX_USR
++#define AuBrAttr_ICEX_USR 0
++#undef AuBrAttr_ICEX_OTH
++#define AuBrAttr_ICEX_OTH 0
++#endif
+#endif
+
+/* the longest combination */
-+#define AuBrPermStrSz sizeof(AUFS_BRPERM_RW \
-+ "+" AUFS_BRATTR_COO_REG \
-+ "+" AUFS_BRATTR_FHSM \
-+ "+" AUFS_BRATTR_UNPIN \
++/* AUFS_BRATTR_ICEX and AUFS_BRATTR_ICEX_TR don't affect here */
++#define AuBrPermStrSz sizeof(AUFS_BRPERM_RW \
++ "+" AUFS_BRATTR_COO_REG \
++ "+" AUFS_BRATTR_FHSM \
++ "+" AUFS_BRATTR_UNPIN \
++ "+" AUFS_BRATTR_ICEX_SEC \
++ "+" AUFS_BRATTR_ICEX_SYS \
++ "+" AUFS_BRATTR_ICEX_USR \
++ "+" AUFS_BRATTR_ICEX_OTH \
+ "+" AUFS_BRWATTR_NLWH)
+
+typedef struct {
+#define AUFS_CTL_FHSM_FD _IOW(AuCtlType, AuCtl_FHSM_FD, int)
+
+#endif /* __AUFS_TYPE_H__ */
-aufs3.16 loopback patch
-
-diff --git a/drivers/block/loop.c b/drivers/block/loop.c
-index 30efd68..77b31b4 100644
---- a/drivers/block/loop.c
-+++ b/drivers/block/loop.c
-@@ -514,7 +514,7 @@ out:
- }
-
- struct switch_request {
-- struct file *file;
-+ struct file *file, *virt_file;
- struct completion wait;
- };
-
-@@ -576,7 +576,8 @@ static int loop_thread(void *data)
- * 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;
- struct bio *bio = bio_alloc(GFP_KERNEL, 0);
-@@ -584,6 +585,7 @@ static int loop_switch(struct loop_device *lo, struct file *file)
- return -ENOMEM;
- init_completion(&w.wait);
- w.file = file;
-+ w.virt_file = virt_file;
- bio->bi_private = &w;
- bio->bi_bdev = NULL;
- loop_make_request(lo->lo_queue, bio);
-@@ -600,7 +602,7 @@ static int loop_flush(struct loop_device *lo)
- if (!lo->lo_thread)
- return 0;
-
-- return loop_switch(lo, NULL);
-+ return loop_switch(lo, NULL, NULL);
- }
-
- /*
-@@ -619,6 +621,7 @@ 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);
-@@ -627,6 +630,13 @@ out:
- complete(&p->wait);
- }
-
-+static struct file *loop_real_file(struct file *file)
-+{
-+ struct file *f = NULL;
-+ if (file->f_dentry->d_sb->s_op->real_loop)
-+ f = file->f_dentry->d_sb->s_op->real_loop(file);
-+ return f;
-+}
-
- /*
- * loop_change_fd switched the backing store of a loopback device to
-@@ -640,6 +650,7 @@ static int loop_change_fd(struct loop_device *lo, struct block_device *bdev,
- unsigned int arg)
- {
- struct file *file, *old_file;
-+ struct file *f, *virt_file = NULL, *old_virt_file;
- struct inode *inode;
- int error;
-
-@@ -656,9 +667,16 @@ static int loop_change_fd(struct loop_device *lo, struct block_device *bdev,
- file = fget(arg);
- if (!file)
- goto out;
-+ f = loop_real_file(file);
-+ if (f) {
-+ virt_file = file;
-+ file = f;
-+ get_file(file);
-+ }
-
- inode = file->f_mapping->host;
- old_file = lo->lo_backing_file;
-+ old_virt_file = lo->lo_backing_virt_file;
-
- error = -EINVAL;
-
-@@ -670,17 +688,21 @@ 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;
-
- fput(old_file);
-+ if (old_virt_file)
-+ fput(old_virt_file);
- if (lo->lo_flags & LO_FLAGS_PARTSCAN)
- ioctl_by_bdev(bdev, BLKRRPART, 0);
- return 0;
-
- out_putf:
- fput(file);
-+ if (virt_file)
-+ fput(virt_file);
- out:
- return error;
- }
-@@ -841,7 +863,7 @@ static void loop_config_discard(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, *f, *virt_file = NULL;
- struct inode *inode;
- struct address_space *mapping;
- unsigned lo_blocksize;
-@@ -856,6 +878,12 @@ static int loop_set_fd(struct loop_device *lo, fmode_t mode,
- file = fget(arg);
- if (!file)
- goto out;
-+ f = loop_real_file(file);
-+ if (f) {
-+ virt_file = file;
-+ file = f;
-+ get_file(file);
-+ }
-
- error = -EBUSY;
- if (lo->lo_state != Lo_unbound)
-@@ -904,6 +932,7 @@ 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->lo_backing_virt_file = virt_file;
- lo->transfer = transfer_none;
- lo->ioctl = NULL;
- lo->lo_sizelimit = 0;
-@@ -948,6 +977,7 @@ out_clr:
- lo->lo_thread = NULL;
- lo->lo_device = NULL;
- lo->lo_backing_file = NULL;
-+ lo->lo_backing_virt_file = NULL;
- lo->lo_flags = 0;
- set_capacity(lo->lo_disk, 0);
- invalidate_bdev(bdev);
-@@ -957,6 +987,8 @@ out_clr:
- lo->lo_state = Lo_unbound;
- out_putf:
- fput(file);
-+ if (virt_file)
-+ fput(virt_file);
- out:
- /* This is safe: open() is still holding a reference. */
- module_put(THIS_MODULE);
-@@ -1003,6 +1035,7 @@ 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;
-+ struct file *virt_filp = lo->lo_backing_virt_file;
- gfp_t gfp = lo->old_gfp_mask;
- struct block_device *bdev = lo->lo_device;
-
-@@ -1036,6 +1069,7 @@ static int loop_clr_fd(struct loop_device *lo)
-
- spin_lock_irq(&lo->lo_lock);
- lo->lo_backing_file = NULL;
-+ lo->lo_backing_virt_file = NULL;
- spin_unlock_irq(&lo->lo_lock);
-
- loop_release_xfer(lo);
-@@ -1078,6 +1112,8 @@ static int loop_clr_fd(struct loop_device *lo)
- * bd_mutex which is usually taken before lo_ctl_mutex.
- */
- fput(filp);
-+ if (virt_filp)
-+ fput(virt_filp);
- return 0;
- }
-
-diff --git a/drivers/block/loop.h b/drivers/block/loop.h
-index 90df5d6..cb91822 100644
---- a/drivers/block/loop.h
-+++ b/drivers/block/loop.h
-@@ -44,7 +44,7 @@ struct loop_device {
- int (*ioctl)(struct loop_device *, int cmd,
- unsigned long arg);
-
-- struct file * lo_backing_file;
-+ struct file * lo_backing_file, *lo_backing_virt_file;
- struct block_device *lo_device;
- unsigned lo_blocksize;
- void *key_data;
-diff --git a/fs/aufs/f_op.c b/fs/aufs/f_op.c
-index 24ced51..69fa5cc 100644
---- a/fs/aufs/f_op.c
-+++ b/fs/aufs/f_op.c
-@@ -367,7 +367,7 @@ static ssize_t aufs_splice_read(struct file *file, loff_t *ppos,
- err = -EINVAL;
- h_file = au_hf_top(file);
- get_file(h_file);
-- if (au_test_loopback_kthread()) {
-+ if (0 && au_test_loopback_kthread()) {
- au_warn_loopback(h_file->f_dentry->d_sb);
- 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 3b03b52..4ab749d 100644
---- a/fs/aufs/loop.c
-+++ b/fs/aufs/loop.c
-@@ -130,3 +130,19 @@ void au_loopback_fin(void)
- symbol_put(loop_backing_file);
- kfree(au_warn_loopback_array);
- }
-+
-+/* ---------------------------------------------------------------------- */
-+
-+/* support the loopback block device insude aufs */
-+
-+struct file *aufs_real_loop(struct file *file)
-+{
-+ struct file *f;
-+
-+ BUG_ON(!au_test_aufs(file->f_dentry->d_sb));
-+ fi_read_lock(file);
-+ f = au_hf_top(file);
-+ fi_read_unlock(file);
-+ AuDebugOn(!f);
-+ return f;
-+}
-diff --git a/fs/aufs/loop.h b/fs/aufs/loop.h
-index da8b756..28cb7ea 100644
---- a/fs/aufs/loop.h
-+++ b/fs/aufs/loop.h
-@@ -25,7 +25,11 @@ void au_warn_loopback(struct super_block *h_sb);
-
- int au_loopback_init(void);
- void au_loopback_fin(void);
-+
-+struct file *aufs_real_loop(struct file *file);
- #else
-+AuStub(struct file *, loop_backing_file, return NULL)
-+
- AuStubInt0(au_test_loopback_overlap, struct super_block *sb,
- struct dentry *h_adding)
- AuStubInt0(au_test_loopback_kthread, void)
-@@ -33,6 +37,8 @@ AuStubVoid(au_warn_loopback, struct super_block *h_sb)
-
- AuStubInt0(au_loopback_init, void)
- AuStubVoid(au_loopback_fin, void)
-+
-+AuStub(struct file *, aufs_real_loop, return NULL, struct file *file)
- #endif /* BLK_DEV_LOOP */
-
- #endif /* __KERNEL__ */
-diff --git a/fs/aufs/super.c b/fs/aufs/super.c
-index 45146eb..fccd7d6 100644
---- a/fs/aufs/super.c
-+++ b/fs/aufs/super.c
-@@ -809,7 +809,10 @@ static const struct super_operations aufs_sop = {
- .statfs = aufs_statfs,
- .put_super = aufs_put_super,
- .sync_fs = aufs_sync_fs,
-- .remount_fs = aufs_remount_fs
-+ .remount_fs = aufs_remount_fs,
-+#ifdef CONFIG_AUFS_BDEV_LOOP
-+ .real_loop = aufs_real_loop
-+#endif
- };
-
- /* ---------------------------------------------------------------------- */
-diff --git a/include/linux/fs.h b/include/linux/fs.h
-index 2f32b35..f94f0e6 100644
---- a/include/linux/fs.h
-+++ b/include/linux/fs.h
-@@ -1561,6 +1561,10 @@ struct super_operations {
- int (*bdev_try_to_free_page)(struct super_block*, struct page*, gfp_t);
- long (*nr_cached_objects)(struct super_block *, int);
- long (*free_cached_objects)(struct super_block *, long, int);
-+#if defined(CONFIG_BLK_DEV_LOOP) || defined(CONFIG_BLK_DEV_LOOP_MODULE)
-+ /* and aufs */
-+ struct file *(*real_loop)(struct file *);
-+#endif
- };
-
- /*
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