netdev - [PATCH RFC net-next v5 12/14] vsock/loopback: implement datagram support

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Message-Id: <20230413-b4-vsock-dgram-v5-12-581bd37fdb26@bytedance.com>
Date: Wed, 19 Jul 2023 00:50:16 +0000
From: Bobby Eshleman <bobby.eshleman@...edance.com>
To: Stefan Hajnoczi <stefanha@...hat.com>, 
 Stefano Garzarella <sgarzare@...hat.com>, 
 "Michael S. Tsirkin" <mst@...hat.com>, Jason Wang <jasowang@...hat.com>, 
 Xuan Zhuo <xuanzhuo@...ux.alibaba.com>, 
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
 "K. Y. Srinivasan" <kys@...rosoft.com>, 
 Haiyang Zhang <haiyangz@...rosoft.com>, Wei Liu <wei.liu@...nel.org>, 
 Dexuan Cui <decui@...rosoft.com>, Bryan Tan <bryantan@...are.com>, 
 Vishnu Dasa <vdasa@...are.com>, 
 VMware PV-Drivers Reviewers <pv-drivers@...are.com>
Cc: Dan Carpenter <dan.carpenter@...aro.org>, 
 Simon Horman <simon.horman@...igine.com>, 
 Krasnov Arseniy <oxffffaa@...il.com>, kvm@...r.kernel.org, 
 virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org, 
 linux-kernel@...r.kernel.org, linux-hyperv@...r.kernel.org, 
 bpf@...r.kernel.org, Bobby Eshleman <bobby.eshleman@...edance.com>
Subject: [PATCH RFC net-next v5 12/14] vsock/loopback: implement datagram
 support

This commit implements datagram support for vsock loopback.

Not much more than simply toggling on "dgram_allow" and continuing to
use the common virtio functions.

Signed-off-by: Bobby Eshleman <bobby.eshleman@...edance.com>
---
 net/vmw_vsock/vsock_loopback.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/net/vmw_vsock/vsock_loopback.c b/net/vmw_vsock/vsock_loopback.c
index 278235ea06c4..0459b2bf7b15 100644
--- a/net/vmw_vsock/vsock_loopback.c
+++ b/net/vmw_vsock/vsock_loopback.c
@@ -46,6 +46,7 @@ static int vsock_loopback_cancel_pkt(struct vsock_sock *vsk)
 	return 0;
 }

+static bool vsock_loopback_dgram_allow(u32 cid, u32 port);
 static bool vsock_loopback_seqpacket_allow(u32 remote_cid);

 static struct virtio_transport loopback_transport = {
@@ -62,7 +63,7 @@ static struct virtio_transport loopback_transport = {
 		.cancel_pkt               = vsock_loopback_cancel_pkt,

 		.dgram_enqueue            = virtio_transport_dgram_enqueue,
-		.dgram_allow              = virtio_transport_dgram_allow,
+		.dgram_allow              = vsock_loopback_dgram_allow,

 		.stream_dequeue           = virtio_transport_stream_dequeue,
 		.stream_enqueue           = virtio_transport_stream_enqueue,
@@ -95,6 +96,11 @@ static struct virtio_transport loopback_transport = {
 	.send_pkt = vsock_loopback_send_pkt,
 };

+static bool vsock_loopback_dgram_allow(u32 cid, u32 port)
+{
+	return true;
+}
+
 static bool vsock_loopback_seqpacket_allow(u32 remote_cid)
 {
 	return true;

-- 
2.30.2