Commit 05afee29 authored May 14, 2020 by Jesper Dangaard Brouer Committed by Alexei Starovoitov May 14, 2020

vhost_net: Also populate XDP frame size



In vhost_net_build_xdp() the 'buf' that gets queued via an xdp_buff
have embedded a struct tun_xdp_hdr (located at xdp->data_hard_start)
which contains the buffer length 'buflen' (with tailroom for
skb_shared_info). Also storing this buflen in xdp->frame_sz, does not
obsolete struct tun_xdp_hdr, as it also contains a struct
virtio_net_hdr with other information.

Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/bpf/158945343928.97035.4620233649151726289.stgit@firesoul

parent fb3e6e93

drivers/vhost/net.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -747,6 +747,7 @@ static int vhost_net_build_xdp(struct vhost_net_virtqueue *nvq,
		xdp->data = buf + pad;
		xdp->data_end = xdp->data + len;
		hdr->buflen = buflen;
		xdp->frame_sz = buflen;

		--net->refcnt_bias;
		alloc_frag->offset += buflen;

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