141 /* Transport used for host->guest communication */
143 /* Transport used for guest->host communication */
145 /* Transport used for DGRAM communication */
147 /* Transport used for local communication */
339 	/* Transport reassignment must not remove the binding. */  in vsock_remove_sock()
347 void vsock_for_each_connected_socket(struct vsock_transport *transport,  in vsock_for_each_connected_socket()  argument
358 			if (vsk->transport != transport)  in vsock_for_each_connected_socket()
426 	if (!vsk->transport)  in vsock_deassign_transport()
429 	vsk->transport->destruct(vsk);  in vsock_deassign_transport()
430 	module_put(vsk->transport->module);  in vsock_deassign_transport()
431 	vsk->transport = NULL;  in vsock_deassign_transport()
434 /* Assign a transport to a socket and call the .init transport callback.
439  * The vsk->remote_addr is used to decide which transport to use:
441  *    g2h is not loaded, will use local transport;
443  *    includes VMADDR_FLAG_TO_HOST flag value, will use guest->host transport;
444  *  - remote CID > VMADDR_CID_HOST will use host->guest transport;
489 	if (vsk->transport) {  in vsock_assign_transport()
490 		if (vsk->transport == new_transport) {  in vsock_assign_transport()
495 		/* transport->release() must be called with sock lock acquired.  in vsock_assign_transport()
499 		 * any transport.  in vsock_assign_transport()
501 		vsk->transport->release(vsk);  in vsock_assign_transport()
504 		/* transport's release() and destruct() can touch some socket  in vsock_assign_transport()
505 		 * state, since we are reassigning the socket to a new transport  in vsock_assign_transport()
514 	/* We increase the module refcnt to prevent the transport unloading  in vsock_assign_transport()
523 	 * Whichever transport `new_transport` points at, it won't go away until  in vsock_assign_transport()
542 	vsk->transport = new_transport;  in vsock_assign_transport()
553  * Otherwise we may race with module removal. Do not use on `vsk->transport`.
555 static u32 vsock_registered_transport_cid(const struct vsock_transport **transport)  in vsock_registered_transport_cid()  argument
560 	if (*transport)  in vsock_registered_transport_cid()
561 		cid = (*transport)->get_local_cid();  in vsock_registered_transport_cid()
620 	if (!vsk->transport)  in vsock_send_shutdown()
623 	return vsk->transport->shutdown(vsk, mode);  in vsock_send_shutdown()
733 	return vsk->transport->dgram_bind(vsk, addr);  in __vsock_bind_dgram()
861 	 * can be removed from the bound_table. Unlike transport reassignment  in __vsock_release()
863 	 * being called from the transport release() callback.  in __vsock_release()
867 	if (vsk->transport)  in __vsock_release()
868 		vsk->transport->release(vsk);  in __vsock_release()
922 	if (WARN_ON(!vsk->transport))  in vsock_stream_has_data()
925 	return vsk->transport->stream_has_data(vsk);  in vsock_stream_has_data()
933 	if (WARN_ON(!vsk->transport))  in vsock_connectible_has_data()
937 		return vsk->transport->seqpacket_has_data(vsk);  in vsock_connectible_has_data()
945 	if (WARN_ON(!vsk->transport))  in vsock_stream_has_space()
948 	return vsk->transport->stream_has_space(vsk);  in vsock_stream_has_space()
1145 		const struct vsock_transport *transport;  in vsock_poll()  local
1149 		transport = vsk->transport;  in vsock_poll()
1159 		if (transport && transport->stream_is_active(vsk) &&  in vsock_poll()
1163 			int ret = transport->notify_poll_in(  in vsock_poll()
1184 		if (transport && sk->sk_state == TCP_ESTABLISHED) {  in vsock_poll()
1187 				int ret = transport->notify_poll_out(  in vsock_poll()
1222 	if (WARN_ON_ONCE(!vsk->transport))  in vsock_read_skb()
1225 	return vsk->transport->read_skb(vsk, read_actor);  in vsock_read_skb()
1235 	const struct vsock_transport *transport;  in vsock_dgram_sendmsg()  local
1247 	transport = vsk->transport;  in vsock_dgram_sendmsg()
1265 			remote_addr->svm_cid = transport->get_local_cid();  in vsock_dgram_sendmsg()
1275 			remote_addr->svm_cid = transport->get_local_cid();  in vsock_dgram_sendmsg()
1289 	if (!transport->dgram_allow(remote_addr->svm_cid,  in vsock_dgram_sendmsg()
1295 	err = transport->dgram_enqueue(vsk, remote_addr, msg, len);  in vsock_dgram_sendmsg()
1330 	if (!vsk->transport->dgram_allow(remote_addr->svm_cid,  in vsock_dgram_connect()
1360 	return vsk->transport->dgram_dequeue(vsk, msg, len, flags);  in __vsock_dgram_recvmsg()
1400 	const struct vsock_transport *transport = vsk->transport;  in vsock_transport_cancel_pkt()  local
1402 	if (!transport || !transport->cancel_pkt)  in vsock_transport_cancel_pkt()
1405 	return transport->cancel_pkt(vsk);  in vsock_transport_cancel_pkt()
1436 	const struct vsock_transport *transport;  in vsock_connect()  local
1481 		transport = vsk->transport;  in vsock_connect()
1486 		if (!transport ||  in vsock_connect()
1487 		    !transport->stream_allow(remote_addr->svm_cid,  in vsock_connect()
1499 		err = transport->connect(vsk);  in vsock_connect()
1705 				     const struct vsock_transport *transport,  in vsock_update_buffer_size()  argument
1715 	    transport && transport->notify_buffer_size)  in vsock_update_buffer_size()
1716 		transport->notify_buffer_size(vsk, &val);  in vsock_update_buffer_size()
1730 	const struct vsock_transport *transport;  in vsock_connectible_setsockopt()  local
1754 	transport = vsk->transport;  in vsock_connectible_setsockopt()
1759 		vsock_update_buffer_size(vsk, transport, val);  in vsock_connectible_setsockopt()
1765 		vsock_update_buffer_size(vsk, transport, vsk->buffer_size);  in vsock_connectible_setsockopt()
1771 		vsock_update_buffer_size(vsk, transport, vsk->buffer_size);  in vsock_connectible_setsockopt()
1875 	const struct vsock_transport *transport;  in vsock_connectible_sendmsg()  local
1892 	transport = vsk->transport;  in vsock_connectible_sendmsg()
1909 	if (!transport || sk->sk_state != TCP_ESTABLISHED ||  in vsock_connectible_sendmsg()
1923 	err = transport->notify_send_init(vsk, &send_data);  in vsock_connectible_sendmsg()
1943 			err = transport->notify_send_pre_block(vsk, &send_data);  in vsock_connectible_sendmsg()
1977 		err = transport->notify_send_pre_enqueue(vsk, &send_data);  in vsock_connectible_sendmsg()
1988 			written = transport->seqpacket_enqueue(vsk,  in vsock_connectible_sendmsg()
1991 			written = transport->stream_enqueue(vsk,  in vsock_connectible_sendmsg()
2002 		err = transport->notify_send_post_enqueue(  in vsock_connectible_sendmsg()
2029 	const struct vsock_transport *transport;  in vsock_connectible_wait_data()  local
2036 	transport = vsk->transport;  in vsock_connectible_wait_data()
2057 			err = transport->notify_recv_pre_block(vsk, target, recv_data);  in vsock_connectible_wait_data()
2080 	/* Internal transport error when checking for available  in vsock_connectible_wait_data()
2094 	const struct vsock_transport *transport;  in __vsock_stream_recvmsg()  local
2104 	transport = vsk->transport;  in __vsock_stream_recvmsg()
2113 	if (target >= transport->stream_rcvhiwat(vsk)) {  in __vsock_stream_recvmsg()
2120 	err = transport->notify_recv_init(vsk, target, &recv_data);  in __vsock_stream_recvmsg()
2133 		err = transport->notify_recv_pre_dequeue(vsk, target,  in __vsock_stream_recvmsg()
2138 		read = transport->stream_dequeue(vsk, msg, len - copied, flags);  in __vsock_stream_recvmsg()
2146 		err = transport->notify_recv_post_dequeue(vsk, target, read,  in __vsock_stream_recvmsg()
2172 	const struct vsock_transport *transport;  in __vsock_seqpacket_recvmsg()  local
2180 	transport = vsk->transport;  in __vsock_seqpacket_recvmsg()
2188 	msg_len = transport->seqpacket_dequeue(vsk, msg, flags);  in __vsock_seqpacket_recvmsg()
2225 	const struct vsock_transport *transport;  in __vsock_connectible_recvmsg()  local
2238 	transport = vsk->transport;  in __vsock_connectible_recvmsg()
2240 	if (!transport || sk->sk_state != TCP_ESTABLISHED) {  in __vsock_connectible_recvmsg()
2305 	const struct vsock_transport *transport;  in vsock_set_rcvlowat()  local
2313 	transport = vsk->transport;  in vsock_set_rcvlowat()
2315 	if (transport && transport->notify_set_rcvlowat) {  in vsock_set_rcvlowat()
2318 		err = transport->notify_set_rcvlowat(vsk, val);  in vsock_set_rcvlowat()
2529 	return vsk->transport;  in vsock_core_get_transport()