CEPH_MDS_OP_READDIR
CEPH_MDS_OP_LSSNAP : CEPH_MDS_OP_READDIR;
if (op == CEPH_MDS_OP_READDIR) {
req->r_op == CEPH_MDS_OP_READDIR);
if (result == 0 && (req->r_op == CEPH_MDS_OP_READDIR ||
else if (op == CEPH_MDS_OP_READDIR || op == CEPH_MDS_OP_LSSNAP)
case CEPH_MDS_OP_READDIR: return "readdir";