Quelle  act.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
// Copyright (c) 2021, NVIDIA CORPORATION & AFFILIATES. All rights reserved.

#include "act.h"
#include "en/tc/post_act.h"
#include "en/tc_priv.h"
#include "mlx5_core.h"

static struct mlx5e_tc_act *tc_acts_fdb[NUM_FLOW_ACTIONS] = {
 [FLOW_ACTION_ACCEPT] = &mlx5e_tc_act_accept,
 [FLOW_ACTION_DROP] = &mlx5e_tc_act_drop,
 [FLOW_ACTION_TRAP] = &mlx5e_tc_act_trap,
 [FLOW_ACTION_GOTO] = &mlx5e_tc_act_goto,
 [FLOW_ACTION_REDIRECT] = &mlx5e_tc_act_redirect,
 [FLOW_ACTION_MIRRED] = &mlx5e_tc_act_mirred,
 [FLOW_ACTION_REDIRECT_INGRESS] = &mlx5e_tc_act_redirect_ingress,
 [FLOW_ACTION_VLAN_PUSH] = &mlx5e_tc_act_vlan,
 [FLOW_ACTION_VLAN_POP] = &mlx5e_tc_act_vlan,
 [FLOW_ACTION_VLAN_MANGLE] = &mlx5e_tc_act_vlan_mangle,
 [FLOW_ACTION_TUNNEL_ENCAP] = &mlx5e_tc_act_tun_encap,
 [FLOW_ACTION_TUNNEL_DECAP] = &mlx5e_tc_act_tun_decap,
 [FLOW_ACTION_MANGLE] = &mlx5e_tc_act_pedit,
 [FLOW_ACTION_ADD] = &mlx5e_tc_act_pedit,
 [FLOW_ACTION_CSUM] = &mlx5e_tc_act_csum,
 [FLOW_ACTION_PTYPE] = &mlx5e_tc_act_ptype,
 [FLOW_ACTION_SAMPLE] = &mlx5e_tc_act_sample,
 [FLOW_ACTION_POLICE] = &mlx5e_tc_act_police,
 [FLOW_ACTION_CT] = &mlx5e_tc_act_ct,
 [FLOW_ACTION_MPLS_PUSH] = &mlx5e_tc_act_mpls_push,
 [FLOW_ACTION_MPLS_POP] = &mlx5e_tc_act_mpls_pop,
 [FLOW_ACTION_VLAN_PUSH_ETH] = &mlx5e_tc_act_vlan,
 [FLOW_ACTION_VLAN_POP_ETH] = &mlx5e_tc_act_vlan,
};

static struct mlx5e_tc_act *tc_acts_nic[NUM_FLOW_ACTIONS] = {
 [FLOW_ACTION_ACCEPT] = &mlx5e_tc_act_accept,
 [FLOW_ACTION_DROP] = &mlx5e_tc_act_drop,
 [FLOW_ACTION_GOTO] = &mlx5e_tc_act_goto,
 [FLOW_ACTION_REDIRECT] = &mlx5e_tc_act_mirred_nic,
 [FLOW_ACTION_MANGLE] = &mlx5e_tc_act_pedit,
 [FLOW_ACTION_ADD] = &mlx5e_tc_act_pedit,
 [FLOW_ACTION_CSUM] = &mlx5e_tc_act_csum,
 [FLOW_ACTION_MARK] = &mlx5e_tc_act_mark,
 [FLOW_ACTION_CT] = &mlx5e_tc_act_ct,
};

/**
 * mlx5e_tc_act_get() - Get an action parser for an action id.
 * @act_id: Flow action id.
 * @ns_type: flow namespace type.
 */
struct mlx5e_tc_act *
mlx5e_tc_act_get(enum flow_action_id act_id,
   enum mlx5_flow_namespace_type ns_type)
{
 struct mlx5e_tc_act **tc_acts;

 tc_acts = ns_type == MLX5_FLOW_NAMESPACE_FDB ? tc_acts_fdb : tc_acts_nic;

 return tc_acts[act_id];
}

/**
 * mlx5e_tc_act_init_parse_state() - Init a new parse_state.
 * @parse_state: Parsing state.
 * @flow:        mlx5e tc flow being handled.
 * @flow_action: flow action to parse.
 * @extack:      to set an error msg.
 *
 * The same parse_state should be passed to action parsers
 * for tracking the current parsing state.
 */
void
mlx5e_tc_act_init_parse_state(struct mlx5e_tc_act_parse_state *parse_state,
         struct mlx5e_tc_flow *flow,
         struct flow_action *flow_action,
         struct netlink_ext_ack *extack)
{
 memset(parse_state, 0, sizeof(*parse_state));
 parse_state->flow = flow;
 parse_state->extack = extack;
 parse_state->flow_action = flow_action;
}

int
mlx5e_tc_act_post_parse(struct mlx5e_tc_act_parse_state *parse_state,
   struct flow_action *flow_action, int from, int to,
   struct mlx5_flow_attr *attr,
   enum mlx5_flow_namespace_type ns_type)
{
 struct flow_action_entry *act;
 struct mlx5e_tc_act *tc_act;
 struct mlx5e_priv *priv;
 int err = 0, i;

 priv = parse_state->flow->priv;

 flow_action_for_each(i, act, flow_action) {
  if (i < from)
   continue;
  else if (i > to)
   break;

  tc_act = mlx5e_tc_act_get(act->id, ns_type);
  if (!tc_act || !tc_act->post_parse)
   continue;

  err = tc_act->post_parse(parse_state, priv, attr);
  if (err)
   goto out;
 }

out:
 return err;
}

int
mlx5e_tc_act_set_next_post_act(struct mlx5e_tc_flow *flow,
          struct mlx5_flow_attr *attr,
          struct mlx5_flow_attr *next_attr)
{
 struct mlx5_core_dev *mdev = flow->priv->mdev;
 struct mlx5e_tc_mod_hdr_acts *mod_acts;
 int err;

 mod_acts = &attr->parse_attr->mod_hdr_acts;

 /* Set handle on current post act rule to next post act rule. */
 err = mlx5e_tc_post_act_set_handle(mdev, next_attr->post_act_handle, mod_acts);
 if (err) {
  mlx5_core_warn(mdev, "Failed setting post action handle");
  return err;
 }

 attr->action |= MLX5_FLOW_CONTEXT_ACTION_FWD_DEST |
   MLX5_FLOW_CONTEXT_ACTION_MOD_HDR;

 return 0;
}