# Re: \[PATCH net-next\] net: mlx4: Add XDP\_REDIRECT statistics - From: Tariq Toukan \ - Date: 2021-09-29 10:19:20 - List: netdev - Page: https://ratatoskr.run/netdev/2021/09/7780698 - Thread: https://ratatoskr.run/netdev/2021/09/11211714/t.md ```text For changes in the mlx4 ethernet driver, please use "net/mlx4_en" prefix in patch subject. On 9/28/2021 4:26 PM, Joshua Roys wrote: > Address feedback for XDP_REDIRECT patch. > Description is not helpful at all. Please provide technical description of the content, motivation, why it is needed, etc... > Signed-off-by: Joshua Roys > --- > .../net/ethernet/mellanox/mlx4/en_ethtool.c | 8 ++++++++ > drivers/net/ethernet/mellanox/mlx4/en_port.c | 18 +++++++++++------- > drivers/net/ethernet/mellanox/mlx4/en_rx.c | 4 +++- > drivers/net/ethernet/mellanox/mlx4/mlx4_en.h | 2 ++ > .../net/ethernet/mellanox/mlx4/mlx4_stats.h | 4 +++- > 5 files changed, 27 insertions(+), 9 deletions(-) > > Tested with VPP 21.06 on Fedora 34. > > diff --git a/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c b/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c > index ef518b1040f7..66c8ae29bc7a 100644 > --- a/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c > +++ b/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c > @@ -197,6 +197,8 @@ static const char main_strings[][ETH_GSTRING_LEN] = { > > /* xdp statistics */ > "rx_xdp_drop", > + "rx_xdp_redirect", > + "rx_xdp_redirect_fail", > "rx_xdp_tx", > "rx_xdp_tx_full", > > @@ -428,6 +430,8 @@ static void mlx4_en_get_ethtool_stats(struct net_device *dev, > data[index++] = priv->rx_ring[i]->bytes; > data[index++] = priv->rx_ring[i]->dropped; > data[index++] = priv->rx_ring[i]->xdp_drop; > + data[index++] = priv->rx_ring[i]->xdp_redirect; > + data[index++] = priv->rx_ring[i]->xdp_redirect_fail; > data[index++] = priv->rx_ring[i]->xdp_tx; > data[index++] = priv->rx_ring[i]->xdp_tx_full; > } > @@ -519,6 +523,10 @@ static void mlx4_en_get_strings(struct net_device *dev, > "rx%d_dropped", i); > sprintf(data + (index++) * ETH_GSTRING_LEN, > "rx%d_xdp_drop", i); > + sprintf(data + (index++) * ETH_GSTRING_LEN, > + "rx%d_xdp_redirect", i); > + sprintf(data + (index++) * ETH_GSTRING_LEN, > + "rx%d_xdp_redirect_fail", i); > sprintf(data + (index++) * ETH_GSTRING_LEN, > "rx%d_xdp_tx", i); > sprintf(data + (index++) * ETH_GSTRING_LEN, > diff --git a/drivers/net/ethernet/mellanox/mlx4/en_port.c b/drivers/net/ethernet/mellanox/mlx4/en_port.c > index 0158b88bea5b..043cc9d75b3e 100644 > --- a/drivers/net/ethernet/mellanox/mlx4/en_port.c > +++ b/drivers/net/ethernet/mellanox/mlx4/en_port.c > @@ -239,13 +239,15 @@ int mlx4_en_DUMP_ETH_STATS(struct mlx4_en_dev *mdev, u8 port, u8 reset) > > mlx4_en_fold_software_stats(dev); > > - priv->port_stats.rx_chksum_good = 0; > - priv->port_stats.rx_chksum_none = 0; > - priv->port_stats.rx_chksum_complete = 0; > - priv->port_stats.rx_alloc_pages = 0; > - priv->xdp_stats.rx_xdp_drop = 0; > - priv->xdp_stats.rx_xdp_tx = 0; > - priv->xdp_stats.rx_xdp_tx_full = 0; > + priv->port_stats.rx_chksum_good = 0; > + priv->port_stats.rx_chksum_none = 0; > + priv->port_stats.rx_chksum_complete = 0; > + priv->port_stats.rx_alloc_pages = 0; > + priv->xdp_stats.rx_xdp_drop = 0; > + priv->xdp_stats.rx_xdp_redirect = 0; > + priv->xdp_stats.rx_xdp_redirect_fail = 0; > + priv->xdp_stats.rx_xdp_tx = 0; > + priv->xdp_stats.rx_xdp_tx_full = 0; No need to touch existing lines. Add yours without fixing the existing indintations. > for (i = 0; i < priv->rx_ring_num; i++) { > const struct mlx4_en_rx_ring *ring = priv->rx_ring[i]; > > @@ -255,6 +257,8 @@ int mlx4_en_DUMP_ETH_STATS(struct mlx4_en_dev *mdev, u8 port, u8 reset) > priv->port_stats.rx_chksum_complete += READ_ONCE(ring->csum_complete); > priv->port_stats.rx_alloc_pages += READ_ONCE(ring->rx_alloc_pages); > priv->xdp_stats.rx_xdp_drop += READ_ONCE(ring->xdp_drop); > + priv->xdp_stats.rx_xdp_redirect += READ_ONCE(ring->xdp_redirect); > + priv->xdp_stats.rx_xdp_redirect_fail += READ_ONCE(ring->xdp_redirect_fail); > priv->xdp_stats.rx_xdp_tx += READ_ONCE(ring->xdp_tx); > priv->xdp_stats.rx_xdp_tx_full += READ_ONCE(ring->xdp_tx_full); > } > diff --git a/drivers/net/ethernet/mellanox/mlx4/en_rx.c b/drivers/net/ethernet/mellanox/mlx4/en_rx.c > index 557d7daac2d3..8f09b1de4125 100644 > --- a/drivers/net/ethernet/mellanox/mlx4/en_rx.c > +++ b/drivers/net/ethernet/mellanox/mlx4/en_rx.c > @@ -793,11 +793,13 @@ int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int bud > case XDP_PASS: > break; > case XDP_REDIRECT: > - if (xdp_do_redirect(dev, &xdp, xdp_prog) >= 0) { > + if (!xdp_do_redirect(dev, &xdp, xdp_prog)) { use likely() > + ring->xdp_redirect++; > xdp_redir_flush = true; > frags[0].page = NULL; > goto next; > } > + ring->xdp_redirect_fail++; > trace_xdp_exception(dev, xdp_prog, act); > goto xdp_drop_no_cnt; > case XDP_TX: > diff --git a/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h b/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h > index f3d1a20201ef..f6c90e97b4cd 100644 > --- a/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h > +++ b/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h > @@ -340,6 +340,8 @@ struct mlx4_en_rx_ring { > unsigned long csum_complete; > unsigned long rx_alloc_pages; > unsigned long xdp_drop; > + unsigned long xdp_redirect; > + unsigned long xdp_redirect_fail; > unsigned long xdp_tx; > unsigned long xdp_tx_full; > unsigned long dropped; > diff --git a/drivers/net/ethernet/mellanox/mlx4/mlx4_stats.h b/drivers/net/ethernet/mellanox/mlx4/mlx4_stats.h > index 7b51ae8cf759..e9cd4bb6f83d 100644 > --- a/drivers/net/ethernet/mellanox/mlx4/mlx4_stats.h > +++ b/drivers/net/ethernet/mellanox/mlx4/mlx4_stats.h > @@ -42,9 +42,11 @@ struct mlx4_en_port_stats { > > struct mlx4_en_xdp_stats { > unsigned long rx_xdp_drop; > + unsigned long rx_xdp_redirect; > + unsigned long rx_xdp_redirect_fail; > unsigned long rx_xdp_tx; > unsigned long rx_xdp_tx_full; > -#define NUM_XDP_STATS 3 > +#define NUM_XDP_STATS 5 > }; > > struct mlx4_en_phy_stats { > ```