This patch series introduce the support for ioctl(s) in AF_VSOCK. The only ioctl currently available is SIOCOUTQ, which returns the number of unsent or unacked packets. It is available for SOCK_STREAM, SOCK_SEQPACKET and SOCK_DGRAM. As this information is transport-dependent, a new optional callback is introduced: unsent_bytes. The first patch add ioctl support in AF_VSOCK, while the second patch introduce support for SOCK_STREAM and SOCK_SEQPACKET in all virtio-based transports: virtio_transport (G2H), vhost-vsock (H2G) and vsock-loopback. The latest patch introduce two tests for this new feature. More details can be found in each patch changelog. v3->v4 - Fixed warnings produced by kernel test robots - Functions are now *_unsent_bytes - Minor style changes pointed out by Stefano - Using opts->peer_port in tests - Rebased to latest net-next - Link to v3: https://lore.kernel.org/r/20240626-ioctl_next-v3-0-63be5bf19a40@xxxxxxxxxxx v2->v3 Applied all reviewers' suggetions: - Minor style and code changes - atomic_int replaced with an existing spin_lock. Introduced lock_sock on ioctl call. Rebased to latest net-next v1->v2 Applied all Stefano's suggestions: - vsock_do_ioctl has been rewritten - ioctl(SIOCOUTQ) test is skipped when it is not supported - Minor variable/function name changes - rebased to latest net-next Signed-off-by: Luigi Leonardi <luigi.leonardi@xxxxxxxxxxx> --- Luigi Leonardi (3): vsock: add support for SIOCOUTQ ioctl vsock/virtio: add SIOCOUTQ support for all virtio based transports test/vsock: add ioctl unsent bytes test drivers/vhost/vsock.c | 4 +- include/linux/virtio_vsock.h | 6 +++ include/net/af_vsock.h | 3 ++ net/vmw_vsock/af_vsock.c | 58 ++++++++++++++++++++-- net/vmw_vsock/virtio_transport.c | 4 +- net/vmw_vsock/virtio_transport_common.c | 35 ++++++++++++++ net/vmw_vsock/vsock_loopback.c | 6 +++ tools/testing/vsock/util.c | 6 +-- tools/testing/vsock/util.h | 3 ++ tools/testing/vsock/vsock_test.c | 85 +++++++++++++++++++++++++++++++++ 10 files changed, 202 insertions(+), 8 deletions(-) --- base-commit: 1722389b0d863056d78287a120a1d6cadb8d4f7b change-id: 20240730-ioctl-0da7dee1b725 Best regards, -- Luigi Leonardi <luigi.leonardi@xxxxxxxxxxx>
