vsock/loopback: enable SEQPACKET for transport

Add SEQPACKET ops for loopback transport and 'seqpacket_allow()'
callback.

Signed-off-by: Arseny Krasnov <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

net/vmw_vsock/vsock_loopback.c

···
 	return 0;
 }
 
+static bool vsock_loopback_seqpacket_allow(u32 remote_cid);
+
 static struct virtio_transport loopback_transport = {
 	.transport = {
 		.module                   = THIS_MODULE,
···
 		.stream_is_active         = virtio_transport_stream_is_active,
 		.stream_allow             = virtio_transport_stream_allow,
 
+		.seqpacket_dequeue        = virtio_transport_seqpacket_dequeue,
+		.seqpacket_enqueue        = virtio_transport_seqpacket_enqueue,
+		.seqpacket_allow          = vsock_loopback_seqpacket_allow,
+		.seqpacket_has_data       = virtio_transport_seqpacket_has_data,
+
 		.notify_poll_in           = virtio_transport_notify_poll_in,
 		.notify_poll_out          = virtio_transport_notify_poll_out,
 		.notify_recv_init         = virtio_transport_notify_recv_init,
···
 
 	.send_pkt = vsock_loopback_send_pkt,
 };
+
+static bool vsock_loopback_seqpacket_allow(u32 remote_cid)
+{
+	return true;
+}
 
 static void vsock_loopback_work(struct work_struct *work)
 {