diff options
| author |   Or Gerlitz <ogerlitz@mellanox.com> | 2018-04-10 19:24:51 +0300 |
|---|---|---|
| committer |   Saeed Mahameed <saeedm@mellanox.com> | 2018-05-17 17:48:54 -0700 |
| commit | 8f8ae8953fb34ac01723f1dae5b231f64a3c526b (patch) | |
| tree | 4381dfbfe8847abc1f285c687c70f5abdca58a4f /drivers/net/ethernet/mellanox/mlx5/core/en_tc.c | |
| parent | net/mlx5e: Use shared table for offloaded TC eswitch flows (diff) | |
| download | linux-dev-8f8ae8953fb34ac01723f1dae5b231f64a3c526b.tar.xz linux-dev-8f8ae8953fb34ac01723f1dae5b231f64a3c526b.zip | |
net/mlx5e: Ignore attempts to offload multiple times a TC flow
For VF->VF and uplink->VF rules, the TC core (cls_api) attempts
to offload the same flow multiple times into the driver, b/c we
registered to the egdev callback.
Use the flow cookie to ignore attempts to add such flows, we can't
reject them (return error), b/c this will fail the offload attempt,
so we ignore that. We indentify wrong stat/del calls using the flow
ingress/egress flags, here we do return error to the core.
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Paul Blakey <paulb@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx5/core/en_tc.c')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx5/core/en_tc.c | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c index 05c90b4f8a31..674f1d7d2737 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c @@ -2666,6 +2666,12 @@ int mlx5e_configure_flower(struct mlx5e_priv *priv, get_flags(flags, &flow_flags); + flow = rhashtable_lookup_fast(tc_ht, &f->cookie, tc_ht_params); + if (flow) { + netdev_warn_once(priv->netdev, "flow cookie %lx already exists, ignoring\n", f->cookie); + return 0; + } + if (esw && esw->mode == SRIOV_OFFLOADS) { flow_flags |= MLX5E_TC_FLOW_ESWITCH; attr_size = sizeof(struct mlx5_esw_flow_attr); @@ -2728,6 +2734,17 @@ err_free: return err; } +#define DIRECTION_MASK (MLX5E_TC_INGRESS | MLX5E_TC_EGRESS) +#define FLOW_DIRECTION_MASK (MLX5E_TC_FLOW_INGRESS | MLX5E_TC_FLOW_EGRESS) + +static bool same_flow_direction(struct mlx5e_tc_flow *flow, int flags) +{ + if ((flow->flags & FLOW_DIRECTION_MASK) == (flags & DIRECTION_MASK)) + return true; + + return false; +} + int mlx5e_delete_flower(struct mlx5e_priv *priv, struct tc_cls_flower_offload *f, int flags) { @@ -2735,7 +2752,7 @@ int mlx5e_delete_flower(struct mlx5e_priv *priv, struct mlx5e_tc_flow *flow; flow = rhashtable_lookup_fast(tc_ht, &f->cookie, tc_ht_params); - if (!flow) + if (!flow || !same_flow_direction(flow, flags)) return -EINVAL; rhashtable_remove_fast(tc_ht, &flow->node, tc_ht_params); @@ -2758,7 +2775,7 @@ int mlx5e_stats_flower(struct mlx5e_priv *priv, u64 lastuse; flow = rhashtable_lookup_fast(tc_ht, &f->cookie, tc_ht_params); - if (!flow) + if (!flow || !same_flow_direction(flow, flags)) return -EINVAL; if (!(flow->flags & MLX5E_TC_FLOW_OFFLOADED)) |