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net/mlx5e: CT: Support clear action 

Clear action, as with software, removes all ct metadata from
the packet.

Signed-off-by: Paul Blakey <paulb@mellanox.com>
Reviewed-by: Oz Shlomo <ozsh@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Paul Blakey 2020-03-12 12:23:17 +02:00 committed by David S. Miller
parent 5c6b946047
commit 1ef3018f5a
3 changed files with 95 additions and 12 deletions
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80
drivers/net/ethernet/mellanox/mlx5/core/en/tc_ct.c
View File

@ -1048,12 +1048,79 @@ err_ft:
return err;
}
static int
__mlx5_tc_ct_flow_offload_clear(struct mlx5e_priv *priv,
struct mlx5e_tc_flow *flow,
struct mlx5_flow_spec *orig_spec,
struct mlx5_esw_flow_attr *attr,
struct mlx5e_tc_mod_hdr_acts *mod_acts,
struct mlx5_flow_handle **flow_rule)
{
struct mlx5_tc_ct_priv *ct_priv = mlx5_tc_ct_get_ct_priv(priv);
struct mlx5_eswitch *esw = ct_priv->esw;
struct mlx5_esw_flow_attr *pre_ct_attr;
struct mlx5_modify_hdr *mod_hdr;
struct mlx5_flow_handle *rule;
struct mlx5_ct_flow *ct_flow;
int err;
ct_flow = kzalloc(sizeof(*ct_flow), GFP_KERNEL);
if (!ct_flow)
return -ENOMEM;
/* Base esw attributes on original rule attribute */
pre_ct_attr = &ct_flow->pre_ct_attr;
memcpy(pre_ct_attr, attr, sizeof(*attr));
err = mlx5_tc_ct_entry_set_registers(ct_priv, mod_acts, 0, 0, 0, 0);
if (err) {
ct_dbg("Failed to set register for ct clear");
goto err_set_registers;
}
mod_hdr = mlx5_modify_header_alloc(esw->dev,
MLX5_FLOW_NAMESPACE_FDB,
mod_acts->num_actions,
mod_acts->actions);
if (IS_ERR(mod_hdr)) {
err = PTR_ERR(mod_hdr);
ct_dbg("Failed to add create ct clear mod hdr");
goto err_set_registers;
}
dealloc_mod_hdr_actions(mod_acts);
pre_ct_attr->modify_hdr = mod_hdr;
pre_ct_attr->action |= MLX5_FLOW_CONTEXT_ACTION_MOD_HDR;
rule = mlx5_eswitch_add_offloaded_rule(esw, orig_spec, pre_ct_attr);
if (IS_ERR(rule)) {
err = PTR_ERR(rule);
ct_dbg("Failed to add ct clear rule");
goto err_insert;
}
attr->ct_attr.ct_flow = ct_flow;
ct_flow->pre_ct_rule = rule;
*flow_rule = rule;
return 0;
err_insert:
mlx5_modify_header_dealloc(priv->mdev, mod_hdr);
err_set_registers:
netdev_warn(priv->netdev,
"Failed to offload ct clear flow, err %d\n", err);
return err;
}
struct mlx5_flow_handle *
mlx5_tc_ct_flow_offload(struct mlx5e_priv *priv,
struct mlx5e_tc_flow *flow,
struct mlx5_flow_spec *spec,
struct mlx5_esw_flow_attr *attr)
struct mlx5_esw_flow_attr *attr,
struct mlx5e_tc_mod_hdr_acts *mod_hdr_acts)
{
bool clear_action = attr->ct_attr.ct_action & TCA_CT_ACT_CLEAR;
struct mlx5_tc_ct_priv *ct_priv = mlx5_tc_ct_get_ct_priv(priv);
struct mlx5_flow_handle *rule;
int err;
@ -1062,7 +1129,12 @@ mlx5_tc_ct_flow_offload(struct mlx5e_priv *priv,
return ERR_PTR(-EOPNOTSUPP);
mutex_lock(&ct_priv->control_lock);
err = __mlx5_tc_ct_flow_offload(priv, flow, spec, attr, &rule);
if (clear_action)
err = __mlx5_tc_ct_flow_offload_clear(priv, flow, spec, attr,
mod_hdr_acts, &rule);
else
err = __mlx5_tc_ct_flow_offload(priv, flow, spec, attr,
&rule);
mutex_unlock(&ct_priv->control_lock);
if (err)
return ERR_PTR(err);
@ -1080,11 +1152,15 @@ __mlx5_tc_ct_delete_flow(struct mlx5_tc_ct_priv *ct_priv,
mlx5_eswitch_del_offloaded_rule(esw, ct_flow->pre_ct_rule,
pre_ct_attr);
mlx5_modify_header_dealloc(esw->dev, pre_ct_attr->modify_hdr);
if (ct_flow->post_ct_rule) {
mlx5_eswitch_del_offloaded_rule(esw, ct_flow->post_ct_rule,
&ct_flow->post_ct_attr);
mlx5_esw_chains_put_chain_mapping(esw, ct_flow->chain_mapping);
idr_remove(&ct_priv->fte_ids, ct_flow->fte_id);
mlx5_tc_ct_del_ft_cb(ct_priv, ct_flow->ft);
}
kfree(ct_flow);
}

7
drivers/net/ethernet/mellanox/mlx5/core/en/tc_ct.h
View File

@ -9,6 +9,7 @@
#include <net/tc_act/tc_ct.h>
struct mlx5_esw_flow_attr;
struct mlx5e_tc_mod_hdr_acts;
struct mlx5_rep_uplink_priv;
struct mlx5e_tc_flow;
struct mlx5e_priv;
@ -97,7 +98,8 @@ struct mlx5_flow_handle *
mlx5_tc_ct_flow_offload(struct mlx5e_priv *priv,
struct mlx5e_tc_flow *flow,
struct mlx5_flow_spec *spec,
struct mlx5_esw_flow_attr *attr);
struct mlx5_esw_flow_attr *attr,
struct mlx5e_tc_mod_hdr_acts *mod_hdr_acts);
void
mlx5_tc_ct_delete_flow(struct mlx5e_priv *priv,
struct mlx5e_tc_flow *flow,
@ -142,7 +144,8 @@ static inline struct mlx5_flow_handle *
mlx5_tc_ct_flow_offload(struct mlx5e_priv *priv,
struct mlx5e_tc_flow *flow,
struct mlx5_flow_spec *spec,
struct mlx5_esw_flow_attr *attr)
struct mlx5_esw_flow_attr *attr,
struct mlx5e_tc_mod_hdr_acts *mod_hdr_acts)
{
return ERR_PTR(-EOPNOTSUPP);
}

10
drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
View File

@ -1151,11 +1151,15 @@ mlx5e_tc_offload_fdb_rules(struct mlx5_eswitch *esw,
struct mlx5_flow_spec *spec,
struct mlx5_esw_flow_attr *attr)
{
struct mlx5e_tc_mod_hdr_acts *mod_hdr_acts;
struct mlx5_flow_handle *rule;
struct mlx5e_tc_mod_hdr_acts;
if (flow_flag_test(flow, CT))
return mlx5_tc_ct_flow_offload(flow->priv, flow, spec, attr);
if (flow_flag_test(flow, CT)) {
mod_hdr_acts = &attr->parse_attr->mod_hdr_acts;
return mlx5_tc_ct_flow_offload(flow->priv, flow, spec, attr,
mod_hdr_acts);
}
rule = mlx5_eswitch_add_offloaded_rule(esw, spec, attr);
if (IS_ERR(rule))