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Message-ID: <20230930210308.2394919-5-avkrasnov@salutedevices.com>
Date: Sun, 1 Oct 2023 00:03:00 +0300
From: Arseniy Krasnov <avkrasnov@...utedevices.com>
To: Stefan Hajnoczi <stefanha@...hat.com>,
Stefano Garzarella <sgarzare@...hat.com>,
"David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
"Michael S. Tsirkin" <mst@...hat.com>,
Jason Wang <jasowang@...hat.com>,
Bobby Eshleman <bobby.eshleman@...edance.com>
CC: <kvm@...r.kernel.org>, <virtualization@...ts.linux-foundation.org>,
<netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<kernel@...rdevices.ru>, <oxffffaa@...il.com>,
<avkrasnov@...utedevices.com>
Subject: [PATCH net-next v2 04/12] vsock: enable SOCK_SUPPORT_ZC bit
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@...utedevices.com>
Reviewed-by: Stefano Garzarella <sgarzare@...hat.com>
---
net/vmw_vsock/af_vsock.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c
index f1da06aa6b00..ff44bab05191 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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