ceph: invalidate_authorizer without con->mutex held

This fixes lock ABBA inversion, as the ->invalidate_authorizer()
op may need to take a lock (or even call back into the
messenger).

Signed-off-by: Sage Weil <sage@newdream.net>

1 files changed, 9 insertions, 8 deletions

diff --git a/fs/ceph/messenger.c b/fs/ceph/messenger.c
index fdda707aa137..9ea7b763c8dc 100644
--- a/fs/ceph/messenger.c
+++ b/fs/ceph/messenger.c
@@ -1853,14 +1853,6 @@ static void ceph_fault(struct ceph_connection *con)
                 con->in_msg = NULL;
         }
 
-        /*
-         * in case we faulted due to authentication, invalidate our
-         * current tickets so that we can get new ones.
-         */
-        if (con->auth_retry && con->ops->invalidate_authorizer) {
-                dout("calling invalidate_authorizer()\n");
-                con->ops->invalidate_authorizer(con);
-        }
 
         /* If there are no messages in the queue, place the connection
          * in a STANDBY state (i.e., don't try to reconnect just yet). */
@@ -1890,6 +1882,15 @@ static void ceph_fault(struct ceph_connection *con)
 out_unlock:
         mutex_unlock(&con->mutex);
 out:
+        /*
+         * in case we faulted due to authentication, invalidate our
+         * current tickets so that we can get new ones.
+         */
+        if (con->auth_retry && con->ops->invalidate_authorizer) {
+                dout("calling invalidate_authorizer()\n");
+                con->ops->invalidate_authorizer(con);
+        }
+
         if (con->ops->fault)
                 con->ops->fault(con);
 }