| Message ID | 20211123163955.154512-12-alexandr.lobakin@intel.com (mailing list archive) |
|---|---|
| State | Changes Requested |
| Delegated to: | Netdev Maintainers |
| Headers | show |
| Series | net: introduce and use generic XDP stats | expand |
On 23/11/2021 16:39, Alexander Lobakin wrote: > Export 4 per-channel XDP counters for both sf100 and sfx drivers > using generic XDP stats infra. > > Signed-off-by: Alexander Lobakin <alexandr.lobakin@intel.com> > Reviewed-by: Jesse Brandeburg <jesse.brandeburg@intel.com> The usual Subject: prefix for these drivers is sfc: (or occasionally sfc_ef100: for ef100-specific stuff). > +int efx_get_xdp_stats_nch(const struct net_device *net_dev, u32 attr_id) > +{ > + const struct efx_nic *efx = netdev_priv(net_dev); > + > + switch (attr_id) { > + case IFLA_XDP_XSTATS_TYPE_XDP: > + return efx->n_channels; > + default: > + return -EOPNOTSUPP; > + } > +} > + > +int efx_get_xdp_stats(const struct net_device *net_dev, u32 attr_id, > + void *attr_data) > +{ > + struct ifla_xdp_stats *xdp_stats = attr_data; > + struct efx_nic *efx = netdev_priv(net_dev); > + const struct efx_channel *channel; > + > + switch (attr_id) { > + case IFLA_XDP_XSTATS_TYPE_XDP: > + break; > + default: > + return -EOPNOTSUPP; > + } > + > + spin_lock_bh(&efx->stats_lock); > + > + efx_for_each_channel(channel, efx) { > + xdp_stats->drop = channel->n_rx_xdp_drops; > + xdp_stats->errors = channel->n_rx_xdp_bad_drops; > + xdp_stats->redirect = channel->n_rx_xdp_redirect; > + xdp_stats->tx = channel->n_rx_xdp_tx; > + > + xdp_stats++; > + }What guarantees that efx->n_channels won't change between these two calls, potentially overrunning the buffer? -ed
diff --git a/drivers/net/ethernet/sfc/ef100_netdev.c b/drivers/net/ethernet/sfc/ef100_netdev.c index 67fe44db6b61..0367f7e043d8 100644 --- a/drivers/net/ethernet/sfc/ef100_netdev.c +++ b/drivers/net/ethernet/sfc/ef100_netdev.c @@ -219,6 +219,8 @@ static const struct net_device_ops ef100_netdev_ops = { .ndo_start_xmit = ef100_hard_start_xmit, .ndo_tx_timeout = efx_watchdog, .ndo_get_stats64 = efx_net_stats, + .ndo_get_xdp_stats_nch = efx_get_xdp_stats_nch, + .ndo_get_xdp_stats = efx_get_xdp_stats, .ndo_change_mtu = efx_change_mtu, .ndo_validate_addr = eth_validate_addr, .ndo_set_mac_address = efx_set_mac_address, diff --git a/drivers/net/ethernet/sfc/efx.c b/drivers/net/ethernet/sfc/efx.c index a8c252e2b252..a6a015c4d3b4 100644 --- a/drivers/net/ethernet/sfc/efx.c +++ b/drivers/net/ethernet/sfc/efx.c @@ -588,6 +588,8 @@ static const struct net_device_ops efx_netdev_ops = { .ndo_open = efx_net_open, .ndo_stop = efx_net_stop, .ndo_get_stats64 = efx_net_stats, + .ndo_get_xdp_stats_nch = efx_get_xdp_stats_nch, + .ndo_get_xdp_stats = efx_get_xdp_stats, .ndo_tx_timeout = efx_watchdog, .ndo_start_xmit = efx_hard_start_xmit, .ndo_validate_addr = eth_validate_addr, diff --git a/drivers/net/ethernet/sfc/efx_common.c b/drivers/net/ethernet/sfc/efx_common.c index f187631b2c5c..c2bf79fd66b4 100644 --- a/drivers/net/ethernet/sfc/efx_common.c +++ b/drivers/net/ethernet/sfc/efx_common.c @@ -606,6 +606,48 @@ void efx_net_stats(struct net_device *net_dev, struct rtnl_link_stats64 *stats) spin_unlock_bh(&efx->stats_lock); } +int efx_get_xdp_stats_nch(const struct net_device *net_dev, u32 attr_id) +{ + const struct efx_nic *efx = netdev_priv(net_dev); + + switch (attr_id) { + case IFLA_XDP_XSTATS_TYPE_XDP: + return efx->n_channels; + default: + return -EOPNOTSUPP; + } +} + +int efx_get_xdp_stats(const struct net_device *net_dev, u32 attr_id, + void *attr_data) +{ + struct ifla_xdp_stats *xdp_stats = attr_data; + struct efx_nic *efx = netdev_priv(net_dev); + const struct efx_channel *channel; + + switch (attr_id) { + case IFLA_XDP_XSTATS_TYPE_XDP: + break; + default: + return -EOPNOTSUPP; + } + + spin_lock_bh(&efx->stats_lock); + + efx_for_each_channel(channel, efx) { + xdp_stats->drop = channel->n_rx_xdp_drops; + xdp_stats->errors = channel->n_rx_xdp_bad_drops; + xdp_stats->redirect = channel->n_rx_xdp_redirect; + xdp_stats->tx = channel->n_rx_xdp_tx; + + xdp_stats++; + } + + spin_unlock_bh(&efx->stats_lock); + + return 0; +} + /* Push loopback/power/transmit disable settings to the PHY, and reconfigure * the MAC appropriately. All other PHY configuration changes are pushed * through phy_op->set_settings(), and pushed asynchronously to the MAC diff --git a/drivers/net/ethernet/sfc/efx_common.h b/drivers/net/ethernet/sfc/efx_common.h index 65513fd0cf6c..987d7c6608a2 100644 --- a/drivers/net/ethernet/sfc/efx_common.h +++ b/drivers/net/ethernet/sfc/efx_common.h @@ -32,6 +32,9 @@ void efx_start_all(struct efx_nic *efx); void efx_stop_all(struct efx_nic *efx); void efx_net_stats(struct net_device *net_dev, struct rtnl_link_stats64 *stats); +int efx_get_xdp_stats_nch(const struct net_device *net_dev, u32 attr_id); +int efx_get_xdp_stats(const struct net_device *net_dev, u32 attr_id, + void *attr_data); int efx_create_reset_workqueue(void); void efx_queue_reset_work(struct efx_nic *efx);