Re: [RFC PATCH v5 09/17] vsock: enable SOCK_SUPPORT_ZC bit
From: Stefano Garzarella <sgarzare@redhat.com>
Date: 2023-07-06 16:56:18
Also in:
kvm, lkml, virtualization
On Sat, Jul 01, 2023 at 09:39:39AM +0300, Arseniy Krasnov wrote:
This bit is used by io_uring in case of zerocopy tx mode. io_uring code checks, that socket has this feature. This patch sets it in two places: 1) For socket in 'connect()' call. 2) For new socket which is returned by 'accept()' call. Signed-off-by: Arseniy Krasnov <redacted> --- net/vmw_vsock/af_vsock.c | 6 ++++++ 1 file changed, 6 insertions(+)
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
quoted hunk ↗ jump to hunk
diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c index 033006e1b5ad..da22ae0ef477 100644 --- a/net/vmw_vsock/af_vsock.c +++ b/net/vmw_vsock/af_vsock.c@@ -1406,6 +1406,9 @@ static int vsock_connect(struct socket *sock, struct sockaddr *addr,goto out; } + if (vsock_msgzerocopy_allow(transport)) + set_bit(SOCK_SUPPORT_ZC, &sk->sk_socket->flags); + err = vsock_auto_bind(vsk); if (err) goto out;@@ -1560,6 +1563,9 @@ static int vsock_accept(struct socket *sock, struct socket *newsock, int flags,} else { newsock->state = SS_CONNECTED; sock_graft(connected, newsock); + if (vsock_msgzerocopy_allow(vconnected->transport)) + set_bit(SOCK_SUPPORT_ZC, + &connected->sk_socket->flags); } release_sock(connected); -- 2.25.1