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[PATCH net-next v3 1/3] vsock: Add support for SIOCINQ ioctl

Xuewei Niu posted 3 patches 7 months, 3 weeks ago
There is a newer version of this series
[PATCH net-next v3 1/3] vsock: Add support for SIOCINQ ioctl
Posted by Xuewei Niu 7 months, 3 weeks ago 
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>
---
 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);
+		if (n_bytes < 0) {
+			ret = n_bytes;
+			break;
+		}
+		ret = put_user(n_bytes, arg);
+		break;
+	}
 	case SIOCOUTQ: {
 		ssize_t n_bytes;
 
-- 
2.34.1
Re: [PATCH net-next v3 1/3] vsock: Add support for SIOCINQ ioctl
Posted by Stefano Garzarella 7 months, 3 weeks ago 
CCin 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.nxw@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?

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
>
Re: [PATCH net-next v3 1/3] vsock: Add support for SIOCINQ ioctl
Posted by Xuewei Niu 7 months, 3 weeks ago 
> 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.nxw@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
> >
Re: [PATCH net-next v3 1/3] vsock: Add support for SIOCINQ ioctl
Posted by Stefano Garzarella 7 months, 3 weeks ago 
On Sun, Jun 22, 2025 at 09:59:10PM +0800, Xuewei Niu wrote:
>> 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.nxw@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?

Yep, but let's wait a little bit more.

In that case, please do it in a separate patch (same series is fine) 
that we can easily revert/fix if they will find issues later.

Thanks,
Stefano

>
>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
>> >
>

Patchew 2.1-devel-b67e4c2

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