Commit f7c72265 authored Jul 08, 2025 by Xuewei Niu Committed by Jakub Kicinski Jul 09, 2025

vsock: Add support for SIOCINQ ioctl



Add support for SIOCINQ ioctl, indicating the length of bytes unread in the
socket. The value is obtained from `vsock_stream_has_data()`.

Signed-off-by: Xuewei Niu <niuxuewei.nxw@antgroup.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Reviewed-by: Luigi Leonardi <leonardi@redhat.com>
Link: https://patch.msgid.link/20250708-siocinq-v6-2-3775f9a9e359@antgroup.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>

parent f0c5827d

net/vmw_vsock/af_vsock.c

+22 −0

Original line number	Diff line number	Diff line
		@@ -1389,6 +1389,28 @@ static int vsock_do_ioctl(struct socket *sock, unsigned int cmd,
		vsk = vsock_sk(sk);

		switch (cmd) {
		case SIOCINQ: {
		ssize_t n_bytes;

		if (!vsk->transport) {
		ret = -EOPNOTSUPP;
		break;
		}

		if (sock_type_connectible(sk->sk_type) &&
		sk->sk_state == TCP_LISTEN) {
		ret = -EINVAL;
		break;
		}

		n_bytes = vsock_stream_has_data(vsk);
		if (n_bytes < 0) {
		ret = n_bytes;
		break;
		}
		ret = put_user(n_bytes, arg);
		break;
		}
		case SIOCOUTQ: {
		ssize_t n_bytes;