On Tue, Oct 27, 2015 at 04:51:46PM +0900, Tetsuya Mukawa wrote:
> The patch fixes wrong handling of virtqueue array index when
> GET_VRING_BASE message comes.
> The vhost backend will receive the message per virtqueue.
> Also we should call a destroy callback handler when both RXQ
> and TXQ receives the message.
>
> Signed-off-by: Tetsuya Mukawa <mukawa at igel.co.jp>
Acked-by: Yuanhan Liu <yuanhan.liu at linux.intel.com>
Thanks.
--yliu
> ---
> lib/librte_vhost/vhost_user/virtio-net-user.c | 20 ++++++++++----------
> 1 file changed, 10 insertions(+), 10 deletions(-)
>
> diff --git a/lib/librte_vhost/vhost_user/virtio-net-user.c
> b/lib/librte_vhost/vhost_user/virtio-net-user.c
> index a998ad8..99c075f 100644
> --- a/lib/librte_vhost/vhost_user/virtio-net-user.c
> +++ b/lib/librte_vhost/vhost_user/virtio-net-user.c
> @@ -283,12 +283,10 @@ user_get_vring_base(struct vhost_device_ctx ctx,
> struct vhost_vring_state *state)
> {
> struct virtio_net *dev = get_device(ctx);
> + uint16_t base_idx = state->index / VIRTIO_QNUM * VIRTIO_QNUM;
>
> if (dev == NULL)
> return -1;
> - /* We have to stop the queue (virtio) if it is running. */
> - if (dev->flags & VIRTIO_DEV_RUNNING)
> - notify_ops->destroy_device(dev);
>
> /* Here we are safe to get the last used index */
> ops->get_vring_base(ctx, state->index, state);
> @@ -300,15 +298,17 @@ user_get_vring_base(struct vhost_device_ctx ctx,
> * sent and only sent in vhost_vring_stop.
> * TODO: cleanup the vring, it isn't usable since here.
> */
> - if (dev->virtqueue[state->index + VIRTIO_RXQ]->kickfd >= 0) {
> - close(dev->virtqueue[state->index + VIRTIO_RXQ]->kickfd);
> - dev->virtqueue[state->index + VIRTIO_RXQ]->kickfd = -1;
> - }
> - if (dev->virtqueue[state->index + VIRTIO_TXQ]->kickfd >= 0) {
> - close(dev->virtqueue[state->index + VIRTIO_TXQ]->kickfd);
> - dev->virtqueue[state->index + VIRTIO_TXQ]->kickfd = -1;
> + if (dev->virtqueue[state->index]->kickfd >= 0) {
> + close(dev->virtqueue[state->index]->kickfd);
> + dev->virtqueue[state->index]->kickfd = -1;
> }
>
> + /* We have to stop the queue (virtio) if it is running. */
> + if ((dev->flags & VIRTIO_DEV_RUNNING) &&
> + (dev->virtqueue[base_idx + VIRTIO_RXQ]->kickfd == -1) &&
> + (dev->virtqueue[base_idx + VIRTIO_TXQ]->kickfd == -1))
> + notify_ops->destroy_device(dev);
> +
> return 0;
> }
>
> --
> 2.1.4
