From 2e37e9b0f55e50a099c699ac41ea4fa507fc46ff Mon Sep 17 00:00:00 2001 From: Martin KaFai Lau Date: Thu, 15 Jun 2017 17:29:10 -0700 Subject: [PATCH] bpf: mlx4: Report bpf_prog ID during XDP_QUERY_PROG Add support to mlx4 to report bpf_prog ID during XDP_QUERY_PROG. Signed-off-by: Martin KaFai Lau Cc: Tariq Toukan Cc: Saeed Mahameed Acked-by: Alexei Starovoitov Acked-by: Daniel Borkmann Signed-off-by: David S. Miller --- drivers/net/ethernet/mellanox/mlx4/en_netdev.c | 21 ++++++++++++++++++--- 1 file changed, 18 insertions(+), 3 deletions(-) diff --git a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c index 99c02bb..18252a7 100644 --- a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c +++ b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c @@ -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; + + 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 !!priv->tx_ring_num[TX_XDP]; + 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; -- 2.7.4