linux.git/fs/backing-file.c, branch v6.16

tree-wide: s/revert_creds_light()/revert_creds()/g

2024-12-02T10:25:09+00:00

Rename all calls to revert_creds_light() back to revert_creds().

Link: https://lore.kernel.org/r/20241125-work-cred-v2-6-68b9d38bb5b2@kernel.org
Reviewed-by: Jeff Layton 
Reviewed-by: Jens Axboe 
Signed-off-by: Christian Brauner

tree-wide: s/override_creds_light()/override_creds()/g

2024-12-02T10:25:09+00:00

Rename all calls to override_creds_light() back to overrid_creds().

Link: https://lore.kernel.org/r/20241125-work-cred-v2-5-68b9d38bb5b2@kernel.org
Reviewed-by: Jeff Layton 
Reviewed-by: Jens Axboe 
Signed-off-by: Christian Brauner

fs/backing_file: fix wrong argument in callback

2024-11-26T17:13:29+00:00

Commit 48b50624aec4 ("backing-file: clean up the API") unintentionally
changed the argument in the ->accessed() callback from the user file to
the backing file.

Fixes: 48b50624aec4 ("backing-file: clean up the API")
Reported-by: syzbot+8d1206605b05ca9a0e6a@syzkaller.appspotmail.com
Closes: https://lore.kernel.org/linux-unionfs/67447b3c.050a0220.1cc393.0085.GAE@google.com/
Tested-by: syzbot+8d1206605b05ca9a0e6a@syzkaller.appspotmail.com
Signed-off-by: Amir Goldstein 
Link: https://lore.kernel.org/r/20241126145342.364869-1-amir73il@gmail.com
Acked-by: Miklos Szeredi 
Signed-off-by: Christian Brauner

fs/backing-file: Convert to revert/override_creds_light()

2024-11-11T09:45:04+00:00

As the credentials used by backing-file are long lived in relation to
the critical section (override_creds() -> revert_creds()) we can
replace them by their lighter alternatives.

Signed-off-by: Vinicius Costa Gomes 
Signed-off-by: Amir Goldstein

backing-file: clean up the API

2024-11-11T09:45:03+00:00

 - Pass iocb to ctx->end_write() instead of file + pos

 - Get rid of ctx->user_file, which is redundant most of the time

 - Instead pass iocb to backing_file_splice_read and
   backing_file_splice_write

Signed-off-by: Miklos Szeredi 
Signed-off-by: Amir Goldstein

fs: pass offset and result to backing_file end_write() callback

2024-10-16T11:17:45+00:00

This is needed for extending fuse inode size after fuse passthrough write.

Suggested-by: Miklos Szeredi 
Link: https://lore.kernel.org/linux-fsdevel/CAJfpegs=cvZ_NYy6Q_D42XhYS=Sjj5poM1b5TzXzOVvX=R36aA@mail.gmail.com/
Signed-off-by: Amir Goldstein 
Signed-off-by: Miklos Szeredi

backing-file: convert to using fops->splice_write

2024-08-23T11:08:31+00:00

Filesystems may define their own splice write. Therefore, use the file
fops instead of invoking iter_file_splice_write() directly.

Signed-off-by: Ed Tsai 
Link: https://lore.kernel.org/r/20240708072208.25244-1-ed.tsai@mediatek.com
Fixes: 5ca73468612d ("fuse: implement splice read/write passthrough")
Reviewed-by: Amir Goldstein 
Signed-off-by: Christian Brauner

ovl: implement tmpfile

2024-05-02T18:35:57+00:00

Combine inode creation with opening a file.

There are six separate objects that are being set up: the backing inode,
dentry and file, and the overlay inode, dentry and file.  Cleanup in case
of an error is a bit of a challenge and is difficult to test, so careful
review is needed.

All tmpfile testcases except generic/509 now run/pass, and no regressions
are observed with full xfstests.

Signed-off-by: Miklos Szeredi 
Reviewed-by: Amir Goldstein

fs: Use KMEM_CACHE instead of kmem_cache_create

2024-02-02T12:11:50+00:00

commit 0a31bd5f2bbb ("KMEM_CACHE(): simplify slab cache creation")
introduces a new macro.
Use the new KMEM_CACHE() macro instead of direct kmem_cache_create
to simplify the creation of SLAB caches.

Signed-off-by: Kunwu Chan 
Link: https://lore.kernel.org/r/20240131070941.135178-1-chentao@kylinos.cn
Reviewed-by: Jan Kara 
Signed-off-by: Christian Brauner

fs: factor out backing_file_mmap() helper

2023-12-23T14:35:09+00:00

Assert that the file object is allocated in a backing_file container
so that file_user_path() could be used to display the user path and
not the backing file's path in /proc//maps.

Signed-off-by: Amir Goldstein