[RFC PATCH v4 12/17] vsock/loopback: support MSG_ZEROCOPY for transport

From: Arseniy Krasnov
Date: Sat Jun 03 2023 - 16:55:30 EST


Add 'msgzerocopy_allow()' callback for loopback transport.

Signed-off-by: Arseniy Krasnov <AVKrasnov@xxxxxxxxxxxxxx>
---
net/vmw_vsock/vsock_loopback.c | 8 ++++++++
1 file changed, 8 insertions(+)

diff --git a/net/vmw_vsock/vsock_loopback.c b/net/vmw_vsock/vsock_loopback.c
index 5c6360df1f31..a2e4aeda2d92 100644
--- a/net/vmw_vsock/vsock_loopback.c
+++ b/net/vmw_vsock/vsock_loopback.c
@@ -47,6 +47,7 @@ static int vsock_loopback_cancel_pkt(struct vsock_sock *vsk)
}

static bool vsock_loopback_seqpacket_allow(u32 remote_cid);
+static bool vsock_loopback_msgzerocopy_allow(void);

static struct virtio_transport loopback_transport = {
.transport = {
@@ -92,11 +93,18 @@ static struct virtio_transport loopback_transport = {
.notify_buffer_size = virtio_transport_notify_buffer_size,

.read_skb = virtio_transport_read_skb,
+
+ .msgzerocopy_allow = vsock_loopback_msgzerocopy_allow,
},

.send_pkt = vsock_loopback_send_pkt,
};

+static bool vsock_loopback_msgzerocopy_allow(void)
+{
+ return true;
+}
+
static bool vsock_loopback_seqpacket_allow(u32 remote_cid)
{
return true;
--
2.25.1