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_priv.h"
6 
7 static bool
8 tc_act_can_offload_redirect_ingress(struct mlx5e_tc_act_parse_state *parse_state,
9 				    const struct flow_action_entry *act,
10 				    int act_index,
11 				    struct mlx5_flow_attr *attr)
12 {
13 	struct netlink_ext_ack *extack = parse_state->extack;
14 	struct mlx5e_tc_flow_parse_attr *parse_attr;
15 	struct net_device *out_dev = act->dev;
16 	struct mlx5_esw_flow_attr *esw_attr;
17 
18 	parse_attr = attr->parse_attr;
19 	esw_attr = attr->esw_attr;
20 
21 	if (!out_dev)
22 		return false;
23 
24 	if (!netif_is_ovs_master(out_dev)) {
25 		NL_SET_ERR_MSG_MOD(extack,
26 				   "redirect to ingress is supported only for OVS internal ports");
27 		return false;
28 	}
29 
30 	if (netif_is_ovs_master(parse_attr->filter_dev)) {
31 		NL_SET_ERR_MSG_MOD(extack,
32 				   "redirect to ingress is not supported from internal port");
33 		return false;
34 	}
35 
36 	if (!parse_state->ptype_host) {
37 		NL_SET_ERR_MSG_MOD(extack,
38 				   "redirect to int port ingress requires ptype=host action");
39 		return false;
40 	}
41 
42 	if (esw_attr->out_count) {
43 		NL_SET_ERR_MSG_MOD(extack,
44 				   "redirect to int port ingress is supported only as single destination");
45 		return false;
46 	}
47 
48 	return true;
49 }
50 
51 static int
52 tc_act_parse_redirect_ingress(struct mlx5e_tc_act_parse_state *parse_state,
53 			      const struct flow_action_entry *act,
54 			      struct mlx5e_priv *priv,
55 			      struct mlx5_flow_attr *attr)
56 {
57 	struct mlx5_esw_flow_attr *esw_attr = attr->esw_attr;
58 	struct net_device *out_dev = act->dev;
59 	int err;
60 
61 	attr->action |= MLX5_FLOW_CONTEXT_ACTION_FWD_DEST;
62 
63 	err = mlx5e_set_fwd_to_int_port_actions(priv, attr, out_dev->ifindex,
64 						MLX5E_TC_INT_PORT_INGRESS,
65 						&attr->action, esw_attr->out_count);
66 	if (err)
67 		return err;
68 
69 	esw_attr->out_count++;
70 
71 	return 0;
72 }
73 
74 struct mlx5e_tc_act mlx5e_tc_act_redirect_ingress = {
75 	.can_offload = tc_act_can_offload_redirect_ingress,
76 	.parse_action = tc_act_parse_redirect_ingress,
77 };
78 
79