[PATCH net-next v4 06/12] vsock/virtio: support MSG_ZEROCOPY for transport

From: Arseniy Krasnov
Date: Tue Oct 10 2023 - 15:23:50 EST


Add 'msgzerocopy_allow()' callback for virtio transport.

Signed-off-by: Arseniy Krasnov <avkrasnov@xxxxxxxxxxxxxxxxx>
Reviewed-by: Stefano Garzarella <sgarzare@xxxxxxxxxx>
---
net/vmw_vsock/virtio_transport.c | 7 +++++++
1 file changed, 7 insertions(+)

diff --git a/net/vmw_vsock/virtio_transport.c b/net/vmw_vsock/virtio_transport.c
index 09ba3128e759..d324ae13e2f5 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,
--
2.25.1