> ACCin hyper-v maintainers and list since I have a question about hyperv
> transport.
>
> On Tue, Jun 17, 2025 at 12:53:44PM +0800, Xuewei Niu wrote:
> >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....@antgroup.com>
> >---
> > 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 2e7a3034e965..bae6b89bb5fb 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,
> >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);
>
> Now looks better to me, I just checked transports: vmci and virtio/vhost
> returns what we want, but for hyperv we have:
>
> static s64 hvs_stream_has_data(struct vsock_sock *vsk)
> {
> struct hvsock *hvs = vsk->trans;
> s64 ret;
>
> if (hvs->recv_data_len > 0)
> return 1;
>
> @Hyper-v maintainers: do you know why we don't return `recv_data_len`?
> Do you think we can do that to support this new feature?
Hi Hyper-v maintainers, could you please take a look at this?
Hi Stefano, if no response, can I fix this issue in the next version?
Thanks,
Xuewei
> Thanks,
> Stefano
>
> >+ if (n_bytes < 0) {
> >+ ret = n_bytes;
> >+ break;
> >+ }
> >+ ret = put_user(n_bytes, arg);
> >+ break;
> >+ }
> > case SIOCOUTQ: {
> > ssize_t n_bytes;
> >
> >--
> >2.34.1
> >
