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Y. Srinivasan" , Haiyang Zhang , Wei Liu , Dexuan Cui , Stefano Garzarella , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman Cc: linux-hyperv@vger.kernel.org, virtualization@lists.linux.dev, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Xuewei Niu , fupan.lfp@antgroup.com X-Mailer: b4 0.14.2 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 --- net/vmw_vsock/af_vsock.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c index 2e7a3034e965db30b6ee295370d866e6d8b1c341..bae6b89bb5fb7dd7a3a378f9209= 7561a98a0c814 100644 --- a/net/vmw_vsock/af_vsock.c +++ b/net/vmw_vsock/af_vsock.c @@ -1389,6 +1389,28 @@ static int vsock_do_ioctl(struct socket *sock, unsig= ned int cmd, vsk =3D vsock_sk(sk); =20 switch (cmd) { + case SIOCINQ: { + ssize_t n_bytes; + + if (!vsk->transport) { + ret =3D -EOPNOTSUPP; + break; + } + + if (sock_type_connectible(sk->sk_type) && + sk->sk_state =3D=3D TCP_LISTEN) { + ret =3D -EINVAL; + break; + } + + n_bytes =3D vsock_stream_has_data(vsk); + if (n_bytes < 0) { + ret =3D n_bytes; + break; + } + ret =3D put_user(n_bytes, arg); + break; + } case SIOCOUTQ: { ssize_t n_bytes; =20 --=20 2.34.1