ceph: handle SESSION_FORCE_RO message

mark session as readonly and wake up all cap waiters.

Signed-off-by: Yan, Zheng <zyan@redhat.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c
index d2171f4a6980..c6c33b411a2f 100644
--- a/fs/ceph/mds_client.c
+++ b/fs/ceph/mds_client.c
@@ -2580,6 +2580,14 @@ static void handle_session(struct ceph_mds_session *session,
                 send_flushmsg_ack(mdsc, session, seq);
                 break;
 
+        case CEPH_SESSION_FORCE_RO:
+                dout("force_session_readonly %p\n", session);
+                spin_lock(&session->s_cap_lock);
+                session->s_readonly = true;
+                spin_unlock(&session->s_cap_lock);
+                wake_up_session_caps(session, 0);
+                break;
+
         default:
                 pr_err("mdsc_handle_session bad op %d mds%d\n", op, mds);
                 WARN_ON(1);
@@ -2791,6 +2799,8 @@ static void send_mds_reconnect(struct ceph_mds_client *mdsc,
         spin_unlock(&session->s_gen_ttl_lock);
 
         spin_lock(&session->s_cap_lock);
+        /* don't know if session is readonly */
+        session->s_readonly = 0;
         /*
          * notify __ceph_remove_cap() that we are composing cap reconnect.
          * If a cap get released before being added to the cap reconnect,