MDS: Server::handle_slave_rename_prep now accounts for dir snaplock.
MDS: Server::handle_slave_rename_prep now accounts for dir snaplock.

Previously it ignored the auth pin required to hold snap xlock, which
is currently always held for a rename on a dir. This would lead to
a permanent hang on the request. Now we account for it!

Signed-off-by: Greg Farnum <0bcb4295d38ee745130ea5f2bb88ef4eef474e61@dreamhost.com>
Signed-off-by: Sage Weil <c5b6ff1fd4f0bde10db63d7a3e07166cf6c4229f@dreamhost.com>

ajnelson/ceph,ajnelson/ceph,ajnelson/ceph,ajnelson/ceph,ajnelson/ceph,ajnelson/ceph