smb: client: implement fileattr_set for compression flags

CIFS handles FS_IOC_SETFLAGS in cifs_ioctl() because it does not
implement ->fileattr_set. This causes the request to fall back from the
generic fileattr path and bypass its permission and serialization checks.

Implement ->fileattr_set for regular files and directories and use the
existing compression helper for FS_COMPR_FL. Accept an unchanged
FS_CASEFOLD_FL reported by fileattr_get so chattr can update compression
on case-insensitive shares.

Tested chattr +c and -c on files and directories against Samba. Non-owner
and read-only mount requests were rejected by the VFS checks.

Signed-off-by: Huiwen He <hehuiwen@kylinos.cn>
Reviewed-by: ChenXiaoSong <chenxiaosong@kylinos.cn>
Reviewed-by: David Howells <dhowells@redhat.com>
Signed-off-by: Paulo Alcantara <pc@manguebit.org>

0 files changed, 0 insertions, 0 deletions