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[RFC,v5,12/17] vsock/loopback: support MSG_ZEROCOPY for transport

Message ID 20230701062310.3397129-13-AVKrasnov@sberdevices.ru (mailing list archive)
State Superseded
Delegated to: Netdev Maintainers
Headers show
Series vsock: MSG_ZEROCOPY flag support | expand

Commit Message

Arseniy Krasnov July 1, 2023, 6:23 a.m. UTC 
Add 'msgzerocopy_allow()' callback for loopback transport.

Signed-off-by: Arseniy Krasnov <AVKrasnov@sberdevices.ru>
---
 Changelog:
 v4 -> v5:
  * Move 'msgzerocopy_allow' right after seqpacket callbacks.
  * Don't use prototype for 'vsock_loopback_msgzerocopy_allow()'.

 net/vmw_vsock/vsock_loopback.c | 6 ++++++
 1 file changed, 6 insertions(+)
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Patch

diff --git a/net/vmw_vsock/vsock_loopback.c b/net/vmw_vsock/vsock_loopback.c
index 5c6360df1f31..048640167411 100644
--- a/net/vmw_vsock/vsock_loopback.c
+++ b/net/vmw_vsock/vsock_loopback.c
@@ -47,6 +47,10 @@  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)
+{
+	return true;
+}
 
 static struct virtio_transport loopback_transport = {
 	.transport = {
@@ -79,6 +83,8 @@  static struct virtio_transport loopback_transport = {
 		.seqpacket_allow          = vsock_loopback_seqpacket_allow,
 		.seqpacket_has_data       = virtio_transport_seqpacket_has_data,
 
+		.msgzerocopy_allow        = vsock_loopback_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,