ceph: clear migrate seq when MDS restarts

Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
Reviewed-by: Sage Weil <sage@inktank.com>

fs/ceph/mds_client.c

@@ -2455,6 +2455,7 @@ static int encode_caps_cb(struct inode *inode, struct ceph_cap *cap,
 	spin_lock(&ci->i_ceph_lock);
 	cap->seq = 0;        /* reset cap seq */
 	cap->issue_seq = 0;  /* and issue_seq */
+	cap->mseq = 0;       /* and migrate_seq */
 
 	if (recon_state->flock) {
 		rec.v2.cap_id = cpu_to_le64(cap->cap_id);