drivers/net/ethernet/mellanox/mlx5/core/en/tc/act/redirect_ingress.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_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         parse_state->if_count = 0;
  70         esw_attr->out_count++;
  71
  72         return 0;
  73 }
  74
  75 struct mlx5e_tc_act mlx5e_tc_act_redirect_ingress = {
  76         .can_offload = tc_act_can_offload_redirect_ingress,
  77         .parse_action = tc_act_parse_redirect_ingress,
  78 };
  79