tree 7feb5ab81d074b17a7c5b12bcc019c2e1bb010e2
parent 531cb13f1e417c060b54f979e1659ecd69bea650
author Sage Weil <sage@newdream.net> 1288381603 -0400
committer Chris Mason <chris.mason@oracle.com> 1288402930 -0400

Btrfs: allow subvol deletion by unprivileged user with -o user_subvol_rm_allowed

Add a mount option user_subvol_rm_allowed that allows users to delete a
(potentially non-empty!) subvol when they would otherwise we allowed to do
an rmdir(2).  We duplicate the may_delete() checks from the core VFS code
to implement identical security checks (minus the directory size check).
We additionally require that the user has write+exec permission on the
subvol root inode.

Signed-off-by: Sage Weil <sage@newdream.net>
Signed-off-by: Chris Mason <chris.mason@oracle.com>