From: Arseniy Krasnov <avkrasnov@salutedevices.com>
Date: Tue, 10 Oct 2023 19:15:18 +0000 (+0300)
Subject: vsock/virtio: support MSG_ZEROCOPY for transport
X-Git-Tag: v6.7-rc1~160^2~139^2~6
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e2fcc326b4986b6f557acb244b5be218cc10951e;p=thirdparty%2Fkernel%2Flinux.git

vsock/virtio: support MSG_ZEROCOPY for transport

Add 'msgzerocopy_allow()' callback for virtio transport.

Signed-off-by: Arseniy Krasnov <avkrasnov@salutedevices.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/vmw_vsock/virtio_transport.c b/net/vmw_vsock/virtio_transport.c
index 09ba3128e7593..d324ae13e2f5a 100644
--- a/net/vmw_vsock/virtio_transport.c
+++ b/net/vmw_vsock/virtio_transport.c
@@ -486,6 +486,11 @@ static bool virtio_transport_can_msgzerocopy(int bufs_num)
 	return res;
 }
 
+static bool virtio_transport_msgzerocopy_allow(void)
+{
+	return true;
+}
+
 static bool virtio_transport_seqpacket_allow(u32 remote_cid);
 
 static struct virtio_transport virtio_transport = {
@@ -519,6 +524,8 @@ static struct virtio_transport virtio_transport = {
 		.seqpacket_allow          = virtio_transport_seqpacket_allow,
 		.seqpacket_has_data       = virtio_transport_seqpacket_has_data,
 
+		.msgzerocopy_allow        = virtio_transport_msgzerocopy_allow,
+
 		.notify_poll_in           = virtio_transport_notify_poll_in,
 		.notify_poll_out          = virtio_transport_notify_poll_out,
 		.notify_recv_init         = virtio_transport_notify_recv_init,