Re: [dpdk-dev] [PATCH v5 3/3] net/virtio: support GUEST ANNOUNCE

[Tiwei Bie <tiwei.bie@intel.com>]

On Fri, Jan 05, 2018 at 08:46:57AM -0800, Xiao Wang wrote:
[...]
> +static int
> +make_rarp_packet(struct rte_mbuf *rarp_mbuf, const struct ether_addr *mac)
> +{
> +	struct ether_hdr *eth_hdr;
> +	struct arp_hdr  *rarp;

Please just use one space between the type and var instead of two.

> +
[...]
> +static void
> +virtio_notify_peers(struct rte_eth_dev *dev)
> +{
> +	struct virtio_hw *hw = dev->data->dev_private;
> +	struct virtnet_rx *rxvq = dev->data->rx_queues[0];
> +	struct rte_mbuf *rarp_mbuf;
> +
> +	rarp_mbuf = rte_mbuf_raw_alloc(rxvq->mpool);

It's not necessary to use rte_mbuf_raw_alloc() here and
you forgot to initialize the allocated mbuf. I think you
can use rte_pktmbuf_alloc() directly as what I showed in
the example in my previous mail.

> +	if (rarp_mbuf == NULL) {
> +		PMD_DRV_LOG(ERR, "first mbuf allocate free_bufed");

Typos:
first?
free_bufed?

> +		return;
> +	}
[...]
> +static void
> +virtio_ack_link_announce(struct rte_eth_dev *dev)
> +{
> +	struct virtio_hw *hw = dev->data->dev_private;
> +	struct virtio_pmd_ctrl ctrl;
> +	int len;
> +
> +	ctrl.hdr.class = VIRTIO_NET_CTRL_ANNOUNCE;
> +	ctrl.hdr.cmd = VIRTIO_NET_CTRL_ANNOUNCE_ACK;
> +	len = 0;
> +
> +	virtio_send_command(hw->cvq, &ctrl, &len, 0);

If the last param is 0, then the third param could be NULL,
i.e. you don't need to define `len`.

> +}
> +
[...]
> diff --git a/drivers/net/virtio/virtio_ethdev.h b/drivers/net/virtio/virtio_ethdev.h
> index 4a2a2f0..04b6a37 100644
> --- a/drivers/net/virtio/virtio_ethdev.h
> +++ b/drivers/net/virtio/virtio_ethdev.h
> @@ -68,6 +68,7 @@
>  	 1u << VIRTIO_NET_F_HOST_TSO6	  |	\
>  	 1u << VIRTIO_NET_F_MRG_RXBUF	  |	\
>  	 1u << VIRTIO_NET_F_MTU	| \
> +	 1ULL << VIRTIO_NET_F_GUEST_ANNOUNCE  | \

Please use one space before '|' instead of two.

Thanks,
Tiwei