include/net/tc_act/tc_tunnel_key.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * Copyright (c) 2016, Amir Vadai <amir@vadai.me>
   4  * Copyright (c) 2016, Mellanox Technologies. All rights reserved.
   5  */
   6
   7 #ifndef __NET_TC_TUNNEL_KEY_H
   8 #define __NET_TC_TUNNEL_KEY_H
   9
  10 #include <net/act_api.h>
  11 #include <linux/tc_act/tc_tunnel_key.h>
  12 #include <net/dst_metadata.h>
  13
  14 struct tcf_tunnel_key_params {
  15         struct rcu_head         rcu;
  16         int                     tcft_action;
  17         struct metadata_dst     *tcft_enc_metadata;
  18 };
  19
  20 struct tcf_tunnel_key {
  21         struct tc_action              common;
  22         struct tcf_tunnel_key_params __rcu *params;
  23 };
  24
  25 #define to_tunnel_key(a) ((struct tcf_tunnel_key *)a)
  26
  27 static inline bool is_tcf_tunnel_set(const struct tc_action *a)
  28 {
  29 #ifdef CONFIG_NET_CLS_ACT
  30         struct tcf_tunnel_key *t = to_tunnel_key(a);
  31         struct tcf_tunnel_key_params *params = rtnl_dereference(t->params);
  32
  33         if (a->ops && a->ops->id == TCA_ID_TUNNEL_KEY)
  34                 return params->tcft_action == TCA_TUNNEL_KEY_ACT_SET;
  35 #endif
  36         return false;
  37 }
  38
  39 static inline bool is_tcf_tunnel_release(const struct tc_action *a)
  40 {
  41 #ifdef CONFIG_NET_CLS_ACT
  42         struct tcf_tunnel_key *t = to_tunnel_key(a);
  43         struct tcf_tunnel_key_params *params = rtnl_dereference(t->params);
  44
  45         if (a->ops && a->ops->id == TCA_ID_TUNNEL_KEY)
  46                 return params->tcft_action == TCA_TUNNEL_KEY_ACT_RELEASE;
  47 #endif
  48         return false;
  49 }
  50
  51 static inline struct ip_tunnel_info *tcf_tunnel_info(const struct tc_action *a)
  52 {
  53 #ifdef CONFIG_NET_CLS_ACT
  54         struct tcf_tunnel_key *t = to_tunnel_key(a);
  55         struct tcf_tunnel_key_params *params = rtnl_dereference(t->params);
  56
  57         return &params->tcft_enc_metadata->u.tun_info;
  58 #else
  59         return NULL;
  60 #endif
  61 }
  62
  63 static inline struct ip_tunnel_info *
  64 tcf_tunnel_info_copy(const struct tc_action *a)
  65 {
  66 #ifdef CONFIG_NET_CLS_ACT
  67         struct ip_tunnel_info *tun = tcf_tunnel_info(a);
  68
  69         if (tun) {
  70                 size_t tun_size = sizeof(*tun) + tun->options_len;
  71                 struct ip_tunnel_info *tun_copy = kmemdup(tun, tun_size,
  72                                                           GFP_KERNEL);
  73
  74                 return tun_copy;
  75         }
  76 #endif
  77         return NULL;
  78 }
  79 #endif /* __NET_TC_TUNNEL_KEY_H */