ceph: re-send flushing caps (which are revoked) in reconnect stage

if flushing caps were revoked, we should re-send the cap flush in
client reconnect stage. This guarantees that MDS processes the cap
flush message before issuing the flushing caps to other client.

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

fs/ceph/mds_client.c

@@ -2982,6 +2982,9 @@ static void send_mds_reconnect(struct ceph_mds_client *mdsc,
 
 	reply->hdr.data_len = cpu_to_le32(pagelist->length);
 	ceph_msg_data_add_pagelist(reply, pagelist);
+
+	ceph_early_kick_flushing_caps(mdsc, session);
+
 	ceph_con_send(&session->s_con, reply);
 
 	mutex_unlock(&session->s_mutex);