act.c

  1// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
  2// Copyright (c) 2021, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
  3
  4#include "act.h"
  5#include "en/tc/post_act.h"
  6#include "en/tc_priv.h"
  7#include "mlx5_core.h"
  8
  9static struct mlx5e_tc_act *tc_acts_fdb[NUM_FLOW_ACTIONS] = {
 10	[FLOW_ACTION_ACCEPT] = &mlx5e_tc_act_accept,
 11	[FLOW_ACTION_DROP] = &mlx5e_tc_act_drop,
 12	[FLOW_ACTION_TRAP] = &mlx5e_tc_act_trap,
 13	[FLOW_ACTION_GOTO] = &mlx5e_tc_act_goto,
 14	[FLOW_ACTION_REDIRECT] = &mlx5e_tc_act_redirect,
 15	[FLOW_ACTION_MIRRED] = &mlx5e_tc_act_mirred,
 16	[FLOW_ACTION_REDIRECT_INGRESS] = &mlx5e_tc_act_redirect_ingress,
 17	[FLOW_ACTION_VLAN_PUSH] = &mlx5e_tc_act_vlan,
 18	[FLOW_ACTION_VLAN_POP] = &mlx5e_tc_act_vlan,
 19	[FLOW_ACTION_VLAN_MANGLE] = &mlx5e_tc_act_vlan_mangle,
 20	[FLOW_ACTION_TUNNEL_ENCAP] = &mlx5e_tc_act_tun_encap,
 21	[FLOW_ACTION_TUNNEL_DECAP] = &mlx5e_tc_act_tun_decap,
 22	[FLOW_ACTION_MANGLE] = &mlx5e_tc_act_pedit,
 23	[FLOW_ACTION_ADD] = &mlx5e_tc_act_pedit,
 24	[FLOW_ACTION_CSUM] = &mlx5e_tc_act_csum,
 25	[FLOW_ACTION_PTYPE] = &mlx5e_tc_act_ptype,
 26	[FLOW_ACTION_SAMPLE] = &mlx5e_tc_act_sample,
 27	[FLOW_ACTION_POLICE] = &mlx5e_tc_act_police,
 28	[FLOW_ACTION_CT] = &mlx5e_tc_act_ct,
 29	[FLOW_ACTION_MPLS_PUSH] = &mlx5e_tc_act_mpls_push,
 30	[FLOW_ACTION_MPLS_POP] = &mlx5e_tc_act_mpls_pop,
 31	[FLOW_ACTION_VLAN_PUSH_ETH] = &mlx5e_tc_act_vlan,
 32	[FLOW_ACTION_VLAN_POP_ETH] = &mlx5e_tc_act_vlan,
 33};
 34
 35static struct mlx5e_tc_act *tc_acts_nic[NUM_FLOW_ACTIONS] = {
 36	[FLOW_ACTION_ACCEPT] = &mlx5e_tc_act_accept,
 37	[FLOW_ACTION_DROP] = &mlx5e_tc_act_drop,
 38	[FLOW_ACTION_GOTO] = &mlx5e_tc_act_goto,
 39	[FLOW_ACTION_REDIRECT] = &mlx5e_tc_act_mirred_nic,
 40	[FLOW_ACTION_MANGLE] = &mlx5e_tc_act_pedit,
 41	[FLOW_ACTION_ADD] = &mlx5e_tc_act_pedit,
 42	[FLOW_ACTION_CSUM] = &mlx5e_tc_act_csum,
 43	[FLOW_ACTION_MARK] = &mlx5e_tc_act_mark,
 44	[FLOW_ACTION_CT] = &mlx5e_tc_act_ct,
 45};
 46
 47/**
 48 * mlx5e_tc_act_get() - Get an action parser for an action id.
 49 * @act_id: Flow action id.
 50 * @ns_type: flow namespace type.
 51 */
 52struct mlx5e_tc_act *
 53mlx5e_tc_act_get(enum flow_action_id act_id,
 54		 enum mlx5_flow_namespace_type ns_type)
 55{
 56	struct mlx5e_tc_act **tc_acts;
 57
 58	tc_acts = ns_type == MLX5_FLOW_NAMESPACE_FDB ? tc_acts_fdb : tc_acts_nic;
 59
 60	return tc_acts[act_id];
 61}
 62
 63/**
 64 * mlx5e_tc_act_init_parse_state() - Init a new parse_state.
 65 * @parse_state: Parsing state.
 66 * @flow:        mlx5e tc flow being handled.
 67 * @flow_action: flow action to parse.
 68 * @extack:      to set an error msg.
 69 *
 70 * The same parse_state should be passed to action parsers
 71 * for tracking the current parsing state.
 72 */
 73void
 74mlx5e_tc_act_init_parse_state(struct mlx5e_tc_act_parse_state *parse_state,
 75			      struct mlx5e_tc_flow *flow,
 76			      struct flow_action *flow_action,
 77			      struct netlink_ext_ack *extack)
 78{
 79	memset(parse_state, 0, sizeof(*parse_state));
 80	parse_state->flow = flow;
 81	parse_state->extack = extack;
 82	parse_state->flow_action = flow_action;
 83}
 84
 85int
 86mlx5e_tc_act_post_parse(struct mlx5e_tc_act_parse_state *parse_state,
 87			struct flow_action *flow_action, int from, int to,
 88			struct mlx5_flow_attr *attr,
 89			enum mlx5_flow_namespace_type ns_type)
 90{
 91	struct flow_action_entry *act;
 92	struct mlx5e_tc_act *tc_act;
 93	struct mlx5e_priv *priv;
 94	int err = 0, i;
 95
 96	priv = parse_state->flow->priv;
 97
 98	flow_action_for_each(i, act, flow_action) {
 99		if (i < from)
100			continue;
101		else if (i > to)
102			break;
103
104		tc_act = mlx5e_tc_act_get(act->id, ns_type);
105		if (!tc_act || !tc_act->post_parse)
106			continue;
107
108		err = tc_act->post_parse(parse_state, priv, attr);
109		if (err)
110			goto out;
111	}
112
113out:
114	return err;
115}
116
117int
118mlx5e_tc_act_set_next_post_act(struct mlx5e_tc_flow *flow,
119			       struct mlx5_flow_attr *attr,
120			       struct mlx5_flow_attr *next_attr)
121{
122	struct mlx5_core_dev *mdev = flow->priv->mdev;
123	struct mlx5e_tc_mod_hdr_acts *mod_acts;
124	int err;
125
126	mod_acts = &attr->parse_attr->mod_hdr_acts;
127
128	/* Set handle on current post act rule to next post act rule. */
129	err = mlx5e_tc_post_act_set_handle(mdev, next_attr->post_act_handle, mod_acts);
130	if (err) {
131		mlx5_core_warn(mdev, "Failed setting post action handle");
132		return err;
133	}
134
135	attr->action |= MLX5_FLOW_CONTEXT_ACTION_FWD_DEST |
136			MLX5_FLOW_CONTEXT_ACTION_MOD_HDR;
137
138	return 0;
139}