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SubjectRe: [RFC PATCH v5 09/17] vsock: enable SOCK_SUPPORT_ZC bit
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 <AVKrasnov@sberdevices.ru>
>---
> net/vmw_vsock/af_vsock.c | 6 ++++++
> 1 file changed, 6 insertions(+)

Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>

>
>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
>

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