tree 608fb6daff9de4338e6a19661d27e54a517cf4a1
parent bd975d1eead2558b76e1079e861eacf1f678b73b
author Aurelien Aptel <aaptel@suse.com> 1464199149 +0200
committer Steve French <smfrench@gmail.com> 1469677855 -0500

fs/cifs: make share unaccessible at root level mountable

if, when mounting //HOST/share/sub/dir/foo we can query /sub/dir/foo but
not any of the path components above:

- store the /sub/dir/foo prefix in the cifs super_block info
- in the superblock, set root dentry to the subpath dentry (instead of
  the share root)
- set a flag in the superblock to remember it
- use prefixpath when building path from a dentry

fixes bso#8950

Signed-off-by: Aurelien Aptel <aaptel@suse.com>
CC: Stable <stable@vger.kernel.org>
Reviewed-by: Pavel Shilovsky <pshilovsky@samba.org>
Signed-off-by: Steve French <smfrench@gmail.com>