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bpf: virtio_net: Report bpf_prog ID during XDP_QUERY_PROG 

Add support to virtio_net to report bpf_prog ID during XDP_QUERY_PROG.

Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: Jason Wang <jasowang@redhat.com>
Acked-by: Alexei Starovoitov <ast@fb.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Martin KaFai Lau 2017-06-15 17:29:12 -07:00 committed by David S. Miller
parent 821b2e2944
commit 5b0e6629be
1 changed files with 8 additions and 5 deletions
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13
drivers/net/virtio_net.c
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@ -1955,16 +1955,18 @@ static int virtnet_xdp_set(struct net_device *dev, struct bpf_prog *prog,
return err;
}
static bool virtnet_xdp_query(struct net_device *dev)
static u32 virtnet_xdp_query(struct net_device *dev)
{
struct virtnet_info *vi = netdev_priv(dev);
const struct bpf_prog *xdp_prog;
int i;
for (i = 0; i < vi->max_queue_pairs; i++) {
if (vi->rq[i].xdp_prog)
return true;
xdp_prog = rtnl_dereference(vi->rq[i].xdp_prog);
if (xdp_prog)
return xdp_prog->aux->id;
}
return false;
return 0;
}
static int virtnet_xdp(struct net_device *dev, struct netdev_xdp *xdp)
@ -1973,7 +1975,8 @@ static int virtnet_xdp(struct net_device *dev, struct netdev_xdp *xdp)
case XDP_SETUP_PROG:
return virtnet_xdp_set(dev, xdp->prog, xdp->extack);
case XDP_QUERY_PROG:
xdp->prog_attached = virtnet_xdp_query(dev);
xdp->prog_id = virtnet_xdp_query(dev);
xdp->prog_attached = !!xdp->prog_id;
return 0;
default:
return -EINVAL;