[dpdk-dev] [PATCH] vhost: tcp pkt with virtio header in one desc
Ouyang, Changchun
changchun.ouyang at intel.com
Thu May 28 15:32:51 CEST 2015
I have sent out another patch which has already included such fix,
That patch also fix other issue in rx path, and it is in reworking,
I will send out the v2 version soon.
Accordingly, this patch is a duplicated one.
Thanks
Changchun
> -----Original Message-----
> From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Wei li
> Sent: Thursday, May 28, 2015 4:20 PM
> To: dev at dpdk.org
> Subject: [dpdk-dev] [PATCH] vhost: tcp pkt with virtio header in one desc
>
> Signed-off-by: Wei li <liw at dtdream.com>
> ---
> lib/librte_vhost/vhost_rxtx.c | 17 +++++++++++++----
> 1 file changed, 13 insertions(+), 4 deletions(-)
>
> diff --git a/lib/librte_vhost/vhost_rxtx.c b/lib/librte_vhost/vhost_rxtx.c
> index 4809d32..2d3ea92 100644
> --- a/lib/librte_vhost/vhost_rxtx.c
> +++ b/lib/librte_vhost/vhost_rxtx.c
> @@ -588,8 +588,19 @@ rte_vhost_dequeue_burst(struct virtio_net *dev,
> uint16_t queue_id,
>
> desc = &vq->desc[head[entry_success]];
>
> - /* Discard first buffer as it is the virtio header */
> - desc = &vq->desc[desc->next];
> + if (desc->flags & VRING_DESC_F_NEXT)
> + {
> + /* Discard first buffer as it is the virtio header */
> + desc = &vq->desc[desc->next];
> + vb_offset = 0;
> + vb_avail = desc->len;
> + }
> + else /* virtio header in one desc with real pkt */
> + {
> + /* strip the virtio header */
> + vb_offset = vq->vhost_hlen;
> + vb_avail = desc->len - vq->vhost_hlen;
> + }
>
> /* Buffer address translation. */
> vb_addr = gpa_to_vva(dev, desc->addr); @@ -608,8 +619,6
> @@ rte_vhost_dequeue_burst(struct virtio_net *dev, uint16_t queue_id,
> vq->used->ring[used_idx].id = head[entry_success];
> vq->used->ring[used_idx].len = 0;
>
> - vb_offset = 0;
> - vb_avail = desc->len;
> /* Allocate an mbuf and populate the structure. */
> m = rte_pktmbuf_alloc(mbuf_pool);
> if (unlikely(m == NULL)) {
> --
> 1.9.5.msysgit.1
>
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