> -----Original Message-----
> From: Maxime Coquelin <maxime.coque...@redhat.com>
> Sent: Friday, March 31, 2023 11:43 PM
> To: dev@dpdk.org; david.march...@redhat.com; Xia, Chenbo
> <chenbo....@intel.com>; m...@redhat.com; f...@redhat.com;
> jasow...@redhat.com; Liang, Cunming <cunming.li...@intel.com>; Xie, Yongji
> <xieyon...@bytedance.com>; echau...@redhat.com; epere...@redhat.com;
> amore...@redhat.com
> Cc: Maxime Coquelin <maxime.coque...@redhat.com>
> Subject: [RFC 23/27] vhost: add support for virtqueue state get event
>
> This patch adds support for VDUSE_GET_VQ_STATE event
> handling, which consists in providing the backend last
> available index for the specified virtqueue.
>
> Signed-off-by: Maxime Coquelin <maxime.coque...@redhat.com>
> ---
> lib/vhost/vduse.c | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
> diff --git a/lib/vhost/vduse.c b/lib/vhost/vduse.c
> index 2a183130d3..36028b7315 100644
> --- a/lib/vhost/vduse.c
> +++ b/lib/vhost/vduse.c
> @@ -133,6 +133,7 @@ vduse_events_handler(int fd, void *arg, int *remove
> __rte_unused)
> struct virtio_net *dev = arg;
> struct vduse_dev_request req;
> struct vduse_dev_response resp;
> + struct vhost_virtqueue *vq;
> int ret;
>
> memset(&resp, 0, sizeof(resp));
> @@ -155,6 +156,13 @@ vduse_events_handler(int fd, void *arg, int *remove
> __rte_unused)
> req.type);
>
> switch (req.type) {
> + case VDUSE_GET_VQ_STATE:
> + vq = dev->virtqueue[req.vq_state.index];
> + VHOST_LOG_CONFIG(dev->ifname, INFO, "\tvq index: %u,
> avail_index: %u\n",
> + req.vq_state.index, vq->last_avail_idx);
> + resp.vq_state.split.avail_index = vq->last_avail_idx;
> + resp.result = VDUSE_REQ_RESULT_OK;
> + break;
> default:
> resp.result = VDUSE_REQ_RESULT_FAILED;
> break;
> --
> 2.39.2
Reviewed-by: Chenbo Xia <chenbo....@intel.com>
