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bpf: mlx4: Report bpf_prog ID during XDP_QUERY_PROG

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Add support to mlx4 to report bpf_prog ID during XDP_QUERY_PROG.

Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Cc: Tariq Toukan <tariqt@mellanox.com>
Cc: Saeed Mahameed <saeedm@mellanox.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 17:29:10 -07:00 committed by David S. Miller
parent 58038695e6
commit 2e37e9b0f5
1 changed files with 18 additions and 3 deletions
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21
drivers/net/ethernet/mellanox/mlx4/en_netdev.c
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@ -2825,11 +2825,25 @@ out:
return err;
}
static bool mlx4_xdp_attached(struct net_device *dev)
static u32 mlx4_xdp_query(struct net_device *dev)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
struct mlx4_en_dev *mdev = priv->mdev;
const struct bpf_prog *xdp_prog;
u32 prog_id = 0;
return !!priv->tx_ring_num[TX_XDP];
if (!priv->tx_ring_num[TX_XDP])
return prog_id;
mutex_lock(&mdev->state_lock);
xdp_prog = rcu_dereference_protected(
priv->rx_ring[0]->xdp_prog,
lockdep_is_held(&mdev->state_lock));
if (xdp_prog)
prog_id = xdp_prog->aux->id;
mutex_unlock(&mdev->state_lock);
return prog_id;
}
static int mlx4_xdp(struct net_device *dev, struct netdev_xdp *xdp)
@ -2838,7 +2852,8 @@ static int mlx4_xdp(struct net_device *dev, struct netdev_xdp *xdp)
case XDP_SETUP_PROG:
return mlx4_xdp_set(dev, xdp->prog);
case XDP_QUERY_PROG:
xdp->prog_attached = mlx4_xdp_attached(dev);
xdp->prog_id = mlx4_xdp_query(dev);
xdp->prog_attached = !!xdp->prog_id;
return 0;
default:
return -EINVAL;