ceph: handle session flush message

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

diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c
index 1fd655a..7c00dd5 100644 (file)
--- a/fs/ceph/mds_client.c
+++ b/fs/ceph/mds_client.c
@@ -1137,6 +1137,21 @@ static int send_renew_caps(struct ceph_mds_client *mdsc,
        return 0;
 }
 
+static int send_flushmsg_ack(struct ceph_mds_client *mdsc,
+                            struct ceph_mds_session *session, u64 seq)
+{
+       struct ceph_msg *msg;
+
+       dout("send_flushmsg_ack to mds%d (%s)s seq %lld\n",
+            session->s_mds, session_state_name(session->s_state), seq);
+       msg = create_session_msg(CEPH_SESSION_FLUSHMSG_ACK, seq);
+       if (!msg)
+               return -ENOMEM;
+       ceph_con_send(&session->s_con, msg);
+       return 0;
+}
+
+
 /*
  * Note new cap ttl, and any transition from stale -> not stale (fresh?).
  *
@@ -2396,6 +2411,10 @@ static void handle_session(struct ceph_mds_session *session,
                trim_caps(mdsc, session, le32_to_cpu(h->max_caps));
                break;
 
+       case CEPH_SESSION_FLUSHMSG:
+               send_flushmsg_ack(mdsc, session, seq);
+               break;
+
        default:
                pr_err("mdsc_handle_session bad op %d mds%d\n", op, mds);
                WARN_ON(1);

diff --git a/fs/ceph/strings.c b/fs/ceph/strings.c
index 89fa4a9..4440f44 100644 (file)
--- a/fs/ceph/strings.c
+++ b/fs/ceph/strings.c
@@ -41,6 +41,8 @@ const char *ceph_session_op_name(int op)
        case CEPH_SESSION_RENEWCAPS: return "renewcaps";
        case CEPH_SESSION_STALE: return "stale";
        case CEPH_SESSION_RECALL_STATE: return "recall_state";
+       case CEPH_SESSION_FLUSHMSG: return "flushmsg";
+       case CEPH_SESSION_FLUSHMSG_ACK: return "flushmsg_ack";
        }
        return "???";
 }

diff --git a/include/linux/ceph/ceph_fs.h b/include/linux/ceph/ceph_fs.h
index 2ad7b86..26bb587 100644 (file)
--- a/include/linux/ceph/ceph_fs.h
+++ b/include/linux/ceph/ceph_fs.h
@@ -282,6 +282,8 @@ enum {
        CEPH_SESSION_RENEWCAPS,
        CEPH_SESSION_STALE,
        CEPH_SESSION_RECALL_STATE,
+       CEPH_SESSION_FLUSHMSG,
+       CEPH_SESSION_FLUSHMSG_ACK,
 };
 
 extern const char *ceph_session_op_name(int op);