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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@salutedevices.com> Reviewed-by: Stefano Garzarella <sgarzare@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -1406,6 +1406,9 @@ static int vsock_connect(struct socket *sock, struct sockaddr *addr,
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goto out;
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}
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if (vsock_msgzerocopy_allow(transport))
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set_bit(SOCK_SUPPORT_ZC, &sk->sk_socket->flags);
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err = vsock_auto_bind(vsk);
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if (err)
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goto out;
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@ -1560,6 +1563,9 @@ static int vsock_accept(struct socket *sock, struct socket *newsock, int flags,
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} else {
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newsock->state = SS_CONNECTED;
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sock_graft(connected, newsock);
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if (vsock_msgzerocopy_allow(vconnected->transport))
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set_bit(SOCK_SUPPORT_ZC,
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&connected->sk_socket->flags);
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}
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release_sock(connected);
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