From e493c5bbfe1ba85b969f54f873b2e92b62169e75 Mon Sep 17 00:00:00 2001
From: Robert Nelson <robertcnelson@gmail.com>
Date: Tue, 23 May 2023 15:28:44 -0500
Subject: [PATCH] merge: aufs-base
Signed-off-by: Robert Nelson <robertcnelson@gmail.com>
---
MAINTAINERS | 13 +++++++++++++
drivers/block/loop.c | 18 ++++++++++++++++++
fs/dcache.c | 2 +-
fs/fcntl.c | 4 +++-
fs/namespace.c | 6 ++++++
fs/splice.c | 10 +++++-----
include/linux/fs.h | 2 ++
include/linux/lockdep.h | 2 ++
include/linux/mnt_namespace.h | 3 +++
include/linux/splice.h | 6 ++++++
kernel/locking/lockdep.c | 3 ++-
11 files changed, 61 insertions(+), 8 deletions(-)
diff --git a/MAINTAINERS b/MAINTAINERS
index 3048296871794..d8a6a975a5c60 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -3455,6 +3455,19 @@ F: include/uapi/linux/audit.h
F: kernel/audit*
F: lib/*audit.c
+AUFS (advanced multi layered unification filesystem) FILESYSTEM
+M: "J. R. Okajima" <hooanon05g@gmail.com>
+L: aufs-users@lists.sourceforge.net (members only)
+L: linux-unionfs@vger.kernel.org
+S: Supported
+W: http://aufs.sourceforge.net
+T: git://github.com/sfjro/aufs4-linux.git
+F: Documentation/ABI/testing/debugfs-aufs
+F: Documentation/ABI/testing/sysfs-aufs
+F: Documentation/filesystems/aufs/
+F: fs/aufs/
+F: include/uapi/linux/aufs_type.h
+
AUXILIARY DISPLAY DRIVERS
M: Miguel Ojeda <ojeda@kernel.org>
S: Maintained
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 426d0b42685a0..49ca6b9e71c11 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -645,6 +645,24 @@ static int loop_change_fd(struct loop_device *lo, struct block_device *bdev,
goto done;
}
+/*
+ * 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 52e6d5fdab6bd..519321f32f95e 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -1345,7 +1345,7 @@ 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 146c9ab0cd4b7..c980a05241188 100644
--- a/fs/fcntl.c
+++ b/fs/fcntl.c
@@ -33,7 +33,7 @@
#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/namespace.c b/fs/namespace.c
index e04a9e9e3f14f..f0a33f8f21622 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -852,6 +852,12 @@ 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/splice.c b/fs/splice.c
index 5969b7a1d353a..21db9b057d605 100644
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -756,8 +756,8 @@ static int warn_unsupported(struct file *file, const char *op)
/*
* 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)
{
if (unlikely(!out->f_op->splice_write))
return warn_unsupported(out, "write");
@@ -767,9 +767,9 @@ 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)
{
unsigned int p_space;
int ret;
diff --git a/include/linux/fs.h b/include/linux/fs.h
index f14ecbeab2a9d..a6b5e21801f64 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1370,6 +1370,7 @@ 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);
@@ -2131,6 +2132,7 @@ 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);
diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h
index 1f1099dac3f05..81d10b8e9dc0b 100644
--- a/include/linux/lockdep.h
+++ b/include/linux/lockdep.h
@@ -248,6 +248,8 @@ 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.
*
diff --git a/include/linux/mnt_namespace.h b/include/linux/mnt_namespace.h
index 8f882f5881e87..6b9808f098435 100644
--- a/include/linux/mnt_namespace.h
+++ b/include/linux/mnt_namespace.h
@@ -7,12 +7,15 @@ struct mnt_namespace;
struct fs_struct;
struct user_namespace;
struct ns_common;
+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 struct ns_common *from_mnt_ns(struct mnt_namespace *);
+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 a55179fd60fc3..8e21c53cf8831 100644
--- a/include/linux/splice.h
+++ b/include/linux/splice.h
@@ -93,4 +93,10 @@ extern void splice_shrink_spd(struct splice_pipe_desc *);
extern const struct pipe_buf_operations page_cache_pipe_buf_ops;
extern const struct pipe_buf_operations default_pipe_buf_ops;
+
+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 50d4863974e7a..36caa2ccf344e 100644
--- a/kernel/locking/lockdep.c
+++ b/kernel/locking/lockdep.c
@@ -218,7 +218,7 @@ unsigned long max_lock_class_idx;
struct lock_class lock_classes[MAX_LOCKDEP_KEYS];
DECLARE_BITMAP(lock_classes_in_use, MAX_LOCKDEP_KEYS);
-static inline struct lock_class *hlock_class(struct held_lock *hlock)
+inline struct lock_class *lockdep_hlock_class(struct held_lock *hlock)
{
unsigned int class_idx = hlock->class_idx;
@@ -239,6 +239,7 @@ static inline struct lock_class *hlock_class(struct held_lock *hlock)
*/
return lock_classes + class_idx;
}
+#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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