ceph: handle -ESTALE reply

Send requests that operate on path to directory's auth MDS if
mode == USE_AUTH_MDS. Always retry using the auth MDS if got
-ESTALE reply from non-auth MDS. Also clean up the code that
handles auth MDS change.

Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
1 file changed