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linux/debian/patches/features/all/aufs4/aufs4-base.patch

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From: J. R. Okajima <hooanon05@yahoo.co.jp>
Date: Tue Sep 3 14:14:09 2019 +0900
Subject: aufs4.19.63+ base patch
Origin: https://github.com/sfjro/aufs4-standalone/tree/6c582cc629cbfb4fac5bfc7d20db128c7d201da6
Bug-Debian: https://bugs.debian.org/541828
Patch headers added by debian/bin/genpatch-aufs
SPDX-License-Identifier: GPL-2.0
aufs4.19.63+ base patch
diff --git a/MAINTAINERS b/MAINTAINERS
index 11a59e82d92e..573d5b42b28b 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2605,6 +2605,19 @@ F: include/linux/audit.h
F: include/uapi/linux/audit.h
F: kernel/audit*
+AUFS (advanced multi layered unification filesystem) FILESYSTEM
+M: "J. R. Okajima" <hooanon05g@gmail.com>
+L: aufs-users@lists.sourceforge.net (members only)
+L: linux-unionfs@vger.kernel.org
+W: http://aufs.sourceforge.net
+T: git://github.com/sfjro/aufs4-linux.git
+S: Supported
+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>
S: Maintained
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index f1e63eb7cbca..b732df5f14f3 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -739,6 +739,24 @@ static int loop_change_fd(struct loop_device *lo, struct block_device *bdev,
return error;
}
+/*
+ * for AUFS
+ * no get/put for file.
+ */
+struct file *loop_backing_file(struct super_block *sb)
+{
+ struct file *ret;
+ struct loop_device *l;
+
+ ret = NULL;
+ if (MAJOR(sb->s_dev) == LOOP_MAJOR) {
+ l = sb->s_bdev->bd_disk->private_data;
+ ret = l->lo_backing_file;
+ }
+ return ret;
+}
+EXPORT_SYMBOL_GPL(loop_backing_file);
+
/* loop sysfs attributes */
static ssize_t loop_attr_show(struct device *dev, char *page,
diff --git a/fs/dcache.c b/fs/dcache.c
index 6e0022326afe..3bd53094ac3d 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -1234,7 +1234,7 @@ enum d_walk_ret {
*
* The @enter() callbacks are called with d_lock held.
*/
-static void d_walk(struct dentry *parent, void *data,
+void d_walk(struct dentry *parent, void *data,
enum d_walk_ret (*enter)(void *, struct dentry *))
{
struct dentry *this_parent;
diff --git a/fs/fcntl.c b/fs/fcntl.c
index 4137d96534a6..c91b3e3c4580 100644
--- a/fs/fcntl.c
+++ b/fs/fcntl.c
@@ -32,7 +32,7 @@
#define SETFL_MASK (O_APPEND | O_NONBLOCK | O_NDELAY | O_DIRECT | O_NOATIME)
-static int setfl(int fd, struct file * filp, unsigned long arg)
+int setfl(int fd, struct file * filp, unsigned long arg)
{
struct inode * inode = file_inode(filp);
int error = 0;
@@ -63,6 +63,8 @@ static int setfl(int fd, struct file * filp, unsigned long arg)
if (filp->f_op->check_flags)
error = filp->f_op->check_flags(arg);
+ if (!error && filp->f_op->setfl)
+ error = filp->f_op->setfl(filp, arg);
if (error)
return error;
diff --git a/fs/inode.c b/fs/inode.c
index 5c63693326bb..43046d7223e4 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -1657,7 +1657,7 @@ EXPORT_SYMBOL(generic_update_time);
* This does the actual work of updating an inodes time or version. Must have
* had called mnt_want_write() before calling this.
*/
-static int update_time(struct inode *inode, struct timespec64 *time, int flags)
+int update_time(struct inode *inode, struct timespec64 *time, int flags)
{
int (*update_time)(struct inode *, struct timespec64 *, int);
diff --git a/fs/namespace.c b/fs/namespace.c
index 1fce41ba3535..fbd7edd49a2f 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -770,6 +770,12 @@ static inline int check_mnt(struct mount *mnt)
return mnt->mnt_ns == current->nsproxy->mnt_ns;
}
+/* for aufs, CONFIG_AUFS_BR_FUSE */
+int is_current_mnt_ns(struct vfsmount *mnt)
+{
+ return check_mnt(real_mount(mnt));
+}
+
/*
* vfsmount lock must be held for write
*/
diff --git a/fs/read_write.c b/fs/read_write.c
index 85fd7a8ee29e..c1335b4f19c0 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -489,6 +489,28 @@ ssize_t __vfs_write(struct file *file, const char __user *p, size_t count,
return -EINVAL;
}
+vfs_readf_t vfs_readf(struct file *file)
+{
+ const struct file_operations *fop = file->f_op;
+
+ if (fop->read)
+ return fop->read;
+ if (fop->read_iter)
+ return new_sync_read;
+ return ERR_PTR(-ENOSYS);
+}
+
+vfs_writef_t vfs_writef(struct file *file)
+{
+ const struct file_operations *fop = file->f_op;
+
+ if (fop->write)
+ return fop->write;
+ if (fop->write_iter)
+ return new_sync_write;
+ return ERR_PTR(-ENOSYS);
+}
+
ssize_t __kernel_write(struct file *file, const void *buf, size_t count, loff_t *pos)
{
mm_segment_t old_fs;
diff --git a/fs/splice.c b/fs/splice.c
index 485e409ef841..b2c2d320565b 100644
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -838,8 +838,8 @@ EXPORT_SYMBOL(generic_splice_sendpage);
/*
* Attempt to initiate a splice from pipe to file.
*/
-static long do_splice_from(struct pipe_inode_info *pipe, struct file *out,
- loff_t *ppos, size_t len, unsigned int flags)
+long do_splice_from(struct pipe_inode_info *pipe, struct file *out,
+ loff_t *ppos, size_t len, unsigned int flags)
{
ssize_t (*splice_write)(struct pipe_inode_info *, struct file *,
loff_t *, size_t, unsigned int);
@@ -855,9 +855,9 @@ static long do_splice_from(struct pipe_inode_info *pipe, struct file *out,
/*
* Attempt to initiate a splice from a file to a pipe.
*/
-static long do_splice_to(struct file *in, loff_t *ppos,
- struct pipe_inode_info *pipe, size_t len,
- unsigned int flags)
+long do_splice_to(struct file *in, loff_t *ppos,
+ struct pipe_inode_info *pipe, size_t len,
+ unsigned int flags)
{
ssize_t (*splice_read)(struct file *, loff_t *,
struct pipe_inode_info *, size_t, unsigned int);
diff --git a/fs/sync.c b/fs/sync.c
index b54e0541ad89..28607828e96f 100644
--- a/fs/sync.c
+++ b/fs/sync.c
@@ -28,7 +28,7 @@
* wait == 1 case since in that case write_inode() functions do
* sync_dirty_buffer() and thus effectively write one block at a time.
*/
-static int __sync_filesystem(struct super_block *sb, int wait)
+int __sync_filesystem(struct super_block *sb, int wait)
{
if (wait)
sync_inodes_sb(sb);
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 92420009b9bc..ecad33c40cae 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1295,6 +1295,7 @@ extern void fasync_free(struct fasync_struct *);
/* can be called from interrupts */
extern void kill_fasync(struct fasync_struct **, int, int);
+extern int setfl(int fd, struct file * filp, unsigned long arg);
extern void __f_setown(struct file *filp, struct pid *, enum pid_type, int force);
extern int f_setown(struct file *filp, unsigned long arg, int force);
extern void f_delown(struct file *filp);
@@ -1759,6 +1760,7 @@ struct file_operations {
ssize_t (*sendpage) (struct file *, struct page *, int, size_t, loff_t *, int);
unsigned long (*get_unmapped_area)(struct file *, unsigned long, unsigned long, unsigned long, unsigned long);
int (*check_flags)(int);
+ int (*setfl)(struct file *, unsigned long);
int (*flock) (struct file *, int, struct file_lock *);
ssize_t (*splice_write)(struct pipe_inode_info *, struct file *, loff_t *, size_t, unsigned int);
ssize_t (*splice_read)(struct file *, loff_t *, struct pipe_inode_info *, size_t, unsigned int);
@@ -1830,6 +1832,12 @@ ssize_t rw_copy_check_uvector(int type, const struct iovec __user * uvector,
struct iovec *fast_pointer,
struct iovec **ret_pointer);
+typedef ssize_t (*vfs_readf_t)(struct file *, char __user *, size_t, loff_t *);
+typedef ssize_t (*vfs_writef_t)(struct file *, const char __user *, size_t,
+ loff_t *);
+vfs_readf_t vfs_readf(struct file *file);
+vfs_writef_t vfs_writef(struct file *file);
+
extern ssize_t __vfs_read(struct file *, char __user *, size_t, loff_t *);
extern ssize_t vfs_read(struct file *, char __user *, size_t, loff_t *);
extern ssize_t vfs_write(struct file *, const char __user *, size_t, loff_t *);
@@ -2255,6 +2263,7 @@ extern int current_umask(void);
extern void ihold(struct inode * inode);
extern void iput(struct inode *);
extern int generic_update_time(struct inode *, struct timespec64 *, int);
+extern int update_time(struct inode *, struct timespec64 *, int);
/* /sys/fs */
extern struct kobject *fs_kobj;
@@ -2542,6 +2551,7 @@ static inline bool sb_is_blkdev_sb(struct super_block *sb)
return false;
}
#endif
+extern int __sync_filesystem(struct super_block *, int);
extern int sync_filesystem(struct super_block *);
extern const struct file_operations def_blk_fops;
extern const struct file_operations def_chr_fops;
diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h
index b0d0b51c4d85..f73ffaa0199e 100644
--- a/include/linux/lockdep.h
+++ b/include/linux/lockdep.h
@@ -313,6 +313,8 @@ static inline int lockdep_match_key(struct lockdep_map *lock,
return lock->key == key;
}
+struct lock_class *lockdep_hlock_class(struct held_lock *hlock);
+
/*
* Acquire a lock.
*
@@ -439,6 +441,7 @@ struct lockdep_map { };
#define lockdep_depth(tsk) (0)
+#define lockdep_is_held(lock) (1)
#define lockdep_is_held_type(l, r) (1)
#define lockdep_assert_held(l) do { (void)(l); } while (0)
diff --git a/include/linux/mnt_namespace.h b/include/linux/mnt_namespace.h
index 35942084cd40..24f5fd1a789d 100644
--- a/include/linux/mnt_namespace.h
+++ b/include/linux/mnt_namespace.h
@@ -6,11 +6,14 @@
struct mnt_namespace;
struct fs_struct;
struct user_namespace;
+struct vfsmount;
extern struct mnt_namespace *copy_mnt_ns(unsigned long, struct mnt_namespace *,
struct user_namespace *, struct fs_struct *);
extern void put_mnt_ns(struct mnt_namespace *ns);
+extern int is_current_mnt_ns(struct vfsmount *mnt);
+
extern const struct file_operations proc_mounts_operations;
extern const struct file_operations proc_mountinfo_operations;
extern const struct file_operations proc_mountstats_operations;
diff --git a/include/linux/splice.h b/include/linux/splice.h
index 74b4911ac16d..19789fbea567 100644
--- a/include/linux/splice.h
+++ b/include/linux/splice.h
@@ -87,4 +87,10 @@ extern void splice_shrink_spd(struct splice_pipe_desc *);
extern const struct pipe_buf_operations page_cache_pipe_buf_ops;
extern const struct pipe_buf_operations default_pipe_buf_ops;
+
+extern long do_splice_from(struct pipe_inode_info *pipe, struct file *out,
+ loff_t *ppos, size_t len, unsigned int flags);
+extern long do_splice_to(struct file *in, loff_t *ppos,
+ struct pipe_inode_info *pipe, size_t len,
+ unsigned int flags);
#endif
diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c
index e810e8cb17e1..d0c9931e6531 100644
--- a/kernel/locking/lockdep.c
+++ b/kernel/locking/lockdep.c
@@ -140,7 +140,7 @@ static struct lock_list list_entries[MAX_LOCKDEP_ENTRIES];
unsigned long nr_lock_classes;
static struct lock_class lock_classes[MAX_LOCKDEP_KEYS];
-static inline struct lock_class *hlock_class(struct held_lock *hlock)
+inline struct lock_class *lockdep_hlock_class(struct held_lock *hlock)
{
if (!hlock->class_idx) {
/*
@@ -151,6 +151,7 @@ static inline struct lock_class *hlock_class(struct held_lock *hlock)
}
return lock_classes + hlock->class_idx - 1;
}
+#define hlock_class(hlock) lockdep_hlock_class(hlock)
#ifdef CONFIG_LOCK_STAT
static DEFINE_PER_CPU(struct lock_class_stats[MAX_LOCKDEP_KEYS], cpu_lock_stats);
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