diff options
author | Saeed Mahameed <saeedm@nvidia.com> | 2022-05-17 20:13:09 -0700 |
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committer | Saeed Mahameed <saeedm@nvidia.com> | 2022-05-17 23:41:48 -0700 |
commit | 77422a8f6f61be1ef64978e9a94f40fed0d1634e (patch) | |
tree | deaa2fa9d3ef89012c1ddab64e22f5d3b69942a2 /drivers/net/ethernet | |
parent | f05ec8d9d0d62367b6e1f2cb50d7d2a45e7747cf (diff) | |
download | linux-77422a8f6f61be1ef64978e9a94f40fed0d1634e.tar.bz2 |
net/mlx5e: CT: Add ct driver counters
Connection offload is translated to multiple rules over several
hardware flow tables. Unhandled end-cases may cause a hardware
resource leak causing multiple system symptoms such as a host
memory leak, decreased performance and other scale related issues.
Export the current number of firmware FTEs related to the CT table
as a debugfs counter. Also add a dropped packets counter to help
debug packets dropped on restore failure.
To show the offloaded count:
cat /sys/kernel/debug/mlx5/<PCI>/ct_nic/offloaded
To show the dropped count:
cat /sys/kernel/debug/mlx5/<PCI>/ct_nic/rx_dropped
Signed-off-by: Paul Blakey <paulb@mellanox.com>
Signed-off-by: Roi Dayan <paulb@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Reviewed-by: Oz Shlomo <ozsh@nvidia.com>
Reviewed-by: Paul Blakey <paulb@nvidia.com>
Diffstat (limited to 'drivers/net/ethernet')
-rw-r--r-- | drivers/net/ethernet/mellanox/mlx5/core/en/tc_ct.c | 52 |
1 files changed, 48 insertions, 4 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/tc_ct.c b/drivers/net/ethernet/mellanox/mlx5/core/en/tc_ct.c index 228fbd2c20d4..bceea7a1589e 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en/tc_ct.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en/tc_ct.c @@ -15,6 +15,7 @@ #include <linux/refcount.h> #include <linux/xarray.h> #include <linux/if_macvlan.h> +#include <linux/debugfs.h> #include "lib/fs_chains.h" #include "en/tc_ct.h" @@ -47,6 +48,15 @@ #define ct_dbg(fmt, args...)\ netdev_dbg(ct_priv->netdev, "ct_debug: " fmt "\n", ##args) +struct mlx5_tc_ct_debugfs { + struct { + atomic_t offloaded; + atomic_t rx_dropped; + } stats; + + struct dentry *root; +}; + struct mlx5_tc_ct_priv { struct mlx5_core_dev *dev; const struct net_device *netdev; @@ -66,6 +76,8 @@ struct mlx5_tc_ct_priv { struct mlx5_ct_fs *fs; struct mlx5_ct_fs_ops *fs_ops; spinlock_t ht_lock; /* protects ft entries */ + + struct mlx5_tc_ct_debugfs debugfs; }; struct mlx5_ct_flow { @@ -520,6 +532,8 @@ mlx5_tc_ct_entry_del_rules(struct mlx5_tc_ct_priv *ct_priv, { mlx5_tc_ct_entry_del_rule(ct_priv, entry, true); mlx5_tc_ct_entry_del_rule(ct_priv, entry, false); + + atomic_dec(&ct_priv->debugfs.stats.offloaded); } static struct flow_action_entry * @@ -1040,6 +1054,7 @@ mlx5_tc_ct_entry_add_rules(struct mlx5_tc_ct_priv *ct_priv, if (err) goto err_nat; + atomic_inc(&ct_priv->debugfs.stats.offloaded); return 0; err_nat: @@ -2064,6 +2079,29 @@ out_err: return err; } +static void +mlx5_ct_tc_create_dbgfs(struct mlx5_tc_ct_priv *ct_priv) +{ + bool is_fdb = ct_priv->ns_type == MLX5_FLOW_NAMESPACE_FDB; + struct mlx5_tc_ct_debugfs *ct_dbgfs = &ct_priv->debugfs; + char dirname[16] = {}; + + if (sscanf(dirname, "ct_%s", is_fdb ? "fdb" : "nic") < 0) + return; + + ct_dbgfs->root = debugfs_create_dir(dirname, mlx5_debugfs_get_dev_root(ct_priv->dev)); + debugfs_create_atomic_t("offloaded", 0400, ct_dbgfs->root, + &ct_dbgfs->stats.offloaded); + debugfs_create_atomic_t("rx_dropped", 0400, ct_dbgfs->root, + &ct_dbgfs->stats.rx_dropped); +} + +static void +mlx5_ct_tc_remove_dbgfs(struct mlx5_tc_ct_priv *ct_priv) +{ + debugfs_remove_recursive(ct_priv->debugfs.root); +} + #define INIT_ERR_PREFIX "tc ct offload init failed" struct mlx5_tc_ct_priv * @@ -2139,6 +2177,7 @@ mlx5_tc_ct_init(struct mlx5e_priv *priv, struct mlx5_fs_chains *chains, if (err) goto err_init_fs; + mlx5_ct_tc_create_dbgfs(ct_priv); return ct_priv; err_init_fs: @@ -2171,6 +2210,7 @@ mlx5_tc_ct_clean(struct mlx5_tc_ct_priv *ct_priv) if (!ct_priv) return; + mlx5_ct_tc_remove_dbgfs(ct_priv); chains = ct_priv->chains; ct_priv->fs_ops->destroy(ct_priv->fs); @@ -2200,22 +2240,22 @@ mlx5e_tc_ct_restore_flow(struct mlx5_tc_ct_priv *ct_priv, return true; if (mapping_find(ct_priv->zone_mapping, zone_restore_id, &zone)) - return false; + goto out_inc_drop; if (!mlx5_tc_ct_skb_to_tuple(skb, &tuple, zone)) - return false; + goto out_inc_drop; spin_lock(&ct_priv->ht_lock); entry = mlx5_tc_ct_entry_get(ct_priv, &tuple); if (!entry) { spin_unlock(&ct_priv->ht_lock); - return false; + goto out_inc_drop; } if (IS_ERR(entry)) { spin_unlock(&ct_priv->ht_lock); - return false; + goto out_inc_drop; } spin_unlock(&ct_priv->ht_lock); @@ -2223,4 +2263,8 @@ mlx5e_tc_ct_restore_flow(struct mlx5_tc_ct_priv *ct_priv, __mlx5_tc_ct_entry_put(entry); return true; + +out_inc_drop: + atomic_inc(&ct_priv->debugfs.stats.rx_dropped); + return false; } |