[RFC,v2,21/33] vhost_net: also populate XDP frame size

Message ID 158634674102.707275.8538224465361298932.stgit@firesoul
State New
Headers show
Series
  • Untitled series #42432
Related show

Commit Message

Jesper Dangaard Brouer April 8, 2020, 11:52 a.m.
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.

Cc: Jason Wang <jasowang@redhat.com>
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
---
 drivers/vhost/net.c |    1 +
 1 file changed, 1 insertion(+)

Patch

diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c
index 18e205eeb9af..5bf608766fc2 100644
--- a/drivers/vhost/net.c
+++ b/drivers/vhost/net.c
@@ -745,6 +745,7 @@  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;