linux-kernel - [PATCH net-next v2 0/3] vsock: Introduce SIOCINQ ioctl support

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Message-Id: <20250613031152.1076725-1-niuxuewei.nxw@antgroup.com>
Date: Fri, 13 Jun 2025 11:11:49 +0800
From: Xuewei Niu <niuxuewei97@...il.com>
To: sgarzare@...hat.com,
	mst@...hat.com,
	pabeni@...hat.com,
	jasowang@...hat.com,
	xuanzhuo@...ux.alibaba.com,
	davem@...emloft.net,
	netdev@...r.kernel.org,
	stefanha@...hat.com
Cc: virtualization@...ts.linux.dev,
	kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	fupan.lfp@...group.com,
	Xuewei Niu <niuxuewei.nxw@...group.com>
Subject: [PATCH net-next v2 0/3] vsock: Introduce SIOCINQ ioctl support

This patchset introduces SIOCINQ ioctl support for vsock, indicating the
length of unread bytes.

Similar with SIOCOUTQ ioctl, the information is transport-dependent.

The first patch introduces a new callback, unread_bytes, in vsock
transport, and adds ioctl support in AF_VSOCK.

The second patch implements the SIOCINQ ioctl for all virtio-based transports.

The last one adds two test cases to check the functionality. The changes
have been tested, and the results are as expected.

Signed-off-by: Xuewei Niu <niuxuewei.nxw@...group.com>

--

v1->v2:
https://lore.kernel.org/lkml/20250519070649.3063874-1-niuxuewei.nxw@antgroup.com/
- Use net-next tree.
- Reuse `rx_bytes` to count unread bytes.
- Wrap ioctl syscall with an int pointer argument to implement a retry
  mechanism.

Xuewei Niu (3):
  vsock: Add support for SIOCINQ ioctl
  vsock/virtio: Add SIOCINQ support for all virtio based transports
  test/vsock: Add ioctl SIOCINQ tests

 drivers/vhost/vsock.c                   |  1 +
 include/linux/virtio_vsock.h            |  1 +
 include/net/af_vsock.h                  |  2 +
 net/vmw_vsock/af_vsock.c                | 22 +++++++
 net/vmw_vsock/virtio_transport.c        |  1 +
 net/vmw_vsock/virtio_transport_common.c | 13 ++++
 net/vmw_vsock/vsock_loopback.c          |  1 +
 tools/testing/vsock/util.c              | 36 ++++++++---
 tools/testing/vsock/util.h              |  2 +
 tools/testing/vsock/vsock_test.c        | 83 ++++++++++++++++++++++++-
 10 files changed, 152 insertions(+), 10 deletions(-)

-- 
2.34.1