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;
  32
  33         params = rcu_dereference_protected(t->params,
  34                                            lockdep_is_held(&a->tcfa_lock));
  35         if (a->ops && a->ops->id == TCA_ID_TUNNEL_KEY)
  36                 return params->tcft_action == TCA_TUNNEL_KEY_ACT_SET;
  37 #endif
  38         return false;
  39 }
  40
  41 static inline bool is_tcf_tunnel_release(const struct tc_action *a)
  42 {
  43 #ifdef CONFIG_NET_CLS_ACT
  44         struct tcf_tunnel_key *t = to_tunnel_key(a);
  45         struct tcf_tunnel_key_params *params;
  46
  47         params = rcu_dereference_protected(t->params,
  48                                            lockdep_is_held(&a->tcfa_lock));
  49         if (a->ops && a->ops->id == TCA_ID_TUNNEL_KEY)
  50                 return params->tcft_action == TCA_TUNNEL_KEY_ACT_RELEASE;
  51 #endif
  52         return false;
  53 }
  54
  55 static inline struct ip_tunnel_info *tcf_tunnel_info(const struct tc_action *a)
  56 {
  57 #ifdef CONFIG_NET_CLS_ACT
  58         struct tcf_tunnel_key *t = to_tunnel_key(a);
  59         struct tcf_tunnel_key_params *params;
  60
  61         params = rcu_dereference_protected(t->params,
  62                                            lockdep_is_held(&a->tcfa_lock));
  63
  64         return &params->tcft_enc_metadata->u.tun_info;
  65 #else
  66         return NULL;
  67 #endif
  68 }
  69
  70 static inline struct ip_tunnel_info *
  71 tcf_tunnel_info_copy(const struct tc_action *a)
  72 {
  73 #ifdef CONFIG_NET_CLS_ACT
  74         struct ip_tunnel_info *tun = tcf_tunnel_info(a);
  75
  76         if (tun) {
  77                 size_t tun_size = sizeof(*tun) + tun->options_len;
  78                 struct ip_tunnel_info *tun_copy = kmemdup(tun, tun_size,
  79                                                           GFP_ATOMIC);
  80
  81                 return tun_copy;
  82         }
  83 #endif
  84         return NULL;
  85 }
  86 #endif /* __NET_TC_TUNNEL_KEY_H */