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Commit dc9e5153 authored by Michael S. Tsirkin's avatar Michael S. Tsirkin
Browse files

af_packet: virtio 1.0 stubs 



This merely fixes sparse warnings, without actually
adding support for the new APIs.

Still working out the best way to enable the new
functionality.

Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
parent e72fd72e

net/packet/af_packet.c

+22 −13
Original line number Diff line number Diff line
@@ -2444,13 +2444,15 @@ static int packet_snd(struct socket *sock, struct msghdr *msg, size_t len) 
			goto out_unlock;



		if ((vnet_hdr.flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) &&

		    (vnet_hdr.csum_start + vnet_hdr.csum_offset + 2 >

		      vnet_hdr.hdr_len))

			vnet_hdr.hdr_len = vnet_hdr.csum_start +

						 vnet_hdr.csum_offset + 2;

		    (__virtio16_to_cpu(false, vnet_hdr.csum_start) +

		     __virtio16_to_cpu(false, vnet_hdr.csum_offset) + 2 >

		      __virtio16_to_cpu(false, vnet_hdr.hdr_len)))

			vnet_hdr.hdr_len = __cpu_to_virtio16(false,

				 __virtio16_to_cpu(false, vnet_hdr.csum_start) +

				__virtio16_to_cpu(false, vnet_hdr.csum_offset) + 2);



		err = -EINVAL;

		if (vnet_hdr.hdr_len > len)

		if (__virtio16_to_cpu(false, vnet_hdr.hdr_len) > len)

			goto out_unlock;



		if (vnet_hdr.gso_type != VIRTIO_NET_HDR_GSO_NONE) {
@@ -2492,7 +2494,8 @@ static int packet_snd(struct socket *sock, struct msghdr *msg, size_t len) 
	err = -ENOBUFS;

	hlen = LL_RESERVED_SPACE(dev);

	tlen = dev->needed_tailroom;

	skb = packet_alloc_skb(sk, hlen + tlen, hlen, len, vnet_hdr.hdr_len,

	skb = packet_alloc_skb(sk, hlen + tlen, hlen, len,

			       __virtio16_to_cpu(false, vnet_hdr.hdr_len),

			       msg->msg_flags & MSG_DONTWAIT, &err);

	if (skb == NULL)

		goto out_unlock;
@@ -2534,14 +2537,16 @@ static int packet_snd(struct socket *sock, struct msghdr *msg, size_t len) 


	if (po->has_vnet_hdr) {

		if (vnet_hdr.flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) {

			if (!skb_partial_csum_set(skb, vnet_hdr.csum_start,

						  vnet_hdr.csum_offset)) {

			u16 s = __virtio16_to_cpu(false, vnet_hdr.csum_start);

			u16 o = __virtio16_to_cpu(false, vnet_hdr.csum_offset);

			if (!skb_partial_csum_set(skb, s, o)) {

				err = -EINVAL;

				goto out_free;

			}

		}



		skb_shinfo(skb)->gso_size = vnet_hdr.gso_size;

		skb_shinfo(skb)->gso_size =

			__virtio16_to_cpu(false, vnet_hdr.gso_size);

		skb_shinfo(skb)->gso_type = gso_type;



		/* Header must be checked, and gso_segs computed. */
@@ -2912,8 +2917,10 @@ static int packet_recvmsg(struct kiocb *iocb, struct socket *sock, 
			struct skb_shared_info *sinfo = skb_shinfo(skb);



			/* This is a hint as to how much should be linear. */

			vnet_hdr.hdr_len = skb_headlen(skb);

			vnet_hdr.gso_size = sinfo->gso_size;

			vnet_hdr.hdr_len =

				__cpu_to_virtio16(false, skb_headlen(skb));

			vnet_hdr.gso_size =

				__cpu_to_virtio16(false, sinfo->gso_size);

			if (sinfo->gso_type & SKB_GSO_TCPV4)

				vnet_hdr.gso_type = VIRTIO_NET_HDR_GSO_TCPV4;

			else if (sinfo->gso_type & SKB_GSO_TCPV6)
@@ -2931,8 +2938,10 @@ static int packet_recvmsg(struct kiocb *iocb, struct socket *sock, 


		if (skb->ip_summed == CHECKSUM_PARTIAL) {

			vnet_hdr.flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;

			vnet_hdr.csum_start = skb_checksum_start_offset(skb);

			vnet_hdr.csum_offset = skb->csum_offset;

			vnet_hdr.csum_start = __cpu_to_virtio16(false,

					  skb_checksum_start_offset(skb));

			vnet_hdr.csum_offset = __cpu_to_virtio16(false,

							 skb->csum_offset);

		} else if (skb->ip_summed == CHECKSUM_UNNECESSARY) {

			vnet_hdr.flags = VIRTIO_NET_HDR_F_DATA_VALID;

		} /* else everything is zero */