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Commit e858fae2 authored by Mike Rapoport's avatar Mike Rapoport Committed by David S. Miller
Browse files

virtio_net: use common code for virtio_net_hdr and skb GSO conversion 



Replace open coded conversion between virtio_net_hdr to skb GSO info with
virtio_net_hdr_{from,to}_skb

Signed-off-by: default avatarMike Rapoport <rppt@linux.vnet.ibm.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 34166093

drivers/net/virtio_net.c

+10 −68
Original line number Diff line number Diff line
@@ -479,53 +479,21 @@ static void receive_buf(struct virtnet_info *vi, struct receive_queue *rq, 
	stats->rx_packets++;

	u64_stats_update_end(&stats->rx_syncp);



	if (hdr->hdr.flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) {

		pr_debug("Needs csum!\n");

		if (!skb_partial_csum_set(skb,

			  virtio16_to_cpu(vi->vdev, hdr->hdr.csum_start),

			  virtio16_to_cpu(vi->vdev, hdr->hdr.csum_offset)))

			goto frame_err;

	} else if (hdr->hdr.flags & VIRTIO_NET_HDR_F_DATA_VALID) {

	if (hdr->hdr.flags & VIRTIO_NET_HDR_F_DATA_VALID)

		skb->ip_summed = CHECKSUM_UNNECESSARY;

	}



	skb->protocol = eth_type_trans(skb, dev);

	pr_debug("Receiving skb proto 0x%04x len %i type %i\n",

		 ntohs(skb->protocol), skb->len, skb->pkt_type);



	if (hdr->hdr.gso_type != VIRTIO_NET_HDR_GSO_NONE) {

		pr_debug("GSO!\n");

		switch (hdr->hdr.gso_type & ~VIRTIO_NET_HDR_GSO_ECN) {

		case VIRTIO_NET_HDR_GSO_TCPV4:

			skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;

			break;

		case VIRTIO_NET_HDR_GSO_UDP:

			skb_shinfo(skb)->gso_type = SKB_GSO_UDP;

			break;

		case VIRTIO_NET_HDR_GSO_TCPV6:

			skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;

			break;

		default:

			net_warn_ratelimited("%s: bad gso type %u.\n",

					     dev->name, hdr->hdr.gso_type);

			goto frame_err;

		}



		if (hdr->hdr.gso_type & VIRTIO_NET_HDR_GSO_ECN)

			skb_shinfo(skb)->gso_type |= SKB_GSO_TCP_ECN;



		skb_shinfo(skb)->gso_size = virtio16_to_cpu(vi->vdev,

	if (virtio_net_hdr_to_skb(skb, &hdr->hdr,

				  virtio_is_little_endian(vi->vdev))) {

		net_warn_ratelimited("%s: bad gso: type: %u, size: %u\n",

				     dev->name, hdr->hdr.gso_type,

				     hdr->hdr.gso_size);

		if (skb_shinfo(skb)->gso_size == 0) {

			net_warn_ratelimited("%s: zero gso size.\n", dev->name);

		goto frame_err;

	}



		/* Header must be checked, and gso_segs computed. */

		skb_shinfo(skb)->gso_type |= SKB_GSO_DODGY;

		skb_shinfo(skb)->gso_segs = 0;

	}



	napi_gro_receive(&rq->napi, skb);

	return;
@@ -868,35 +836,9 @@ static int xmit_skb(struct send_queue *sq, struct sk_buff *skb) 
	else

		hdr = skb_vnet_hdr(skb);



	if (skb->ip_summed == CHECKSUM_PARTIAL) {

		hdr->hdr.flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;

		hdr->hdr.csum_start = cpu_to_virtio16(vi->vdev,

						skb_checksum_start_offset(skb));

		hdr->hdr.csum_offset = cpu_to_virtio16(vi->vdev,

							 skb->csum_offset);

	} else {

		hdr->hdr.flags = 0;

		hdr->hdr.csum_offset = hdr->hdr.csum_start = 0;

	}



	if (skb_is_gso(skb)) {

		hdr->hdr.hdr_len = cpu_to_virtio16(vi->vdev, skb_headlen(skb));

		hdr->hdr.gso_size = cpu_to_virtio16(vi->vdev,

						    skb_shinfo(skb)->gso_size);

		if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV4)

			hdr->hdr.gso_type = VIRTIO_NET_HDR_GSO_TCPV4;

		else if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6)

			hdr->hdr.gso_type = VIRTIO_NET_HDR_GSO_TCPV6;

		else if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP)

			hdr->hdr.gso_type = VIRTIO_NET_HDR_GSO_UDP;

		else

	if (virtio_net_hdr_from_skb(skb, &hdr->hdr,

				    virtio_is_little_endian(vi->vdev)))

		BUG();

		if (skb_shinfo(skb)->gso_type & SKB_GSO_TCP_ECN)

			hdr->hdr.gso_type |= VIRTIO_NET_HDR_GSO_ECN;

	} else {

		hdr->hdr.gso_type = VIRTIO_NET_HDR_GSO_NONE;

		hdr->hdr.gso_size = hdr->hdr.hdr_len = 0;

	}



	if (vi->mergeable_rx_bufs)

		hdr->num_buffers = 0;