1 files changed, 15 insertions, 0 deletions

diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c
index 462602ec7fb1..552b934c9cd0 100644
--- a/fs/ceph/mds_client.c
+++ b/fs/ceph/mds_client.c
@@ -2470,6 +2470,21 @@ static void check_new_map(struct ceph_mds_client *mdsc,
                         wake_up_session_caps(s, 1);
                 }
         }
+
+        for (i = 0; i < newmap->m_max_mds && i < mdsc->max_sessions; i++) {
+                s = mdsc->sessions[i];
+                if (!s)
+                        continue;
+                if (!ceph_mdsmap_is_laggy(newmap, i))
+                        continue;
+                if (s->s_state == CEPH_MDS_SESSION_OPEN ||
+                    s->s_state == CEPH_MDS_SESSION_HUNG ||
+                    s->s_state == CEPH_MDS_SESSION_CLOSING) {
+                        dout(" connecting to export targets of laggy mds%d\n",
+                             i);
+                        __open_export_target_sessions(mdsc, s);
+                }
+        }
 }