LXR linux/include/net/tc_act/tc_tunnel

   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
  14struct tcf_tunnel_key_params {
  15        struct rcu_head         rcu;
  16        int                     tcft_action;
  17        struct metadata_dst     *tcft_enc_metadata;
  18};
  19
  20struct 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
  27static 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
  41static 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
  55static 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
  70static inline struct ip_tunnel_info *
  71tcf_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 */
  87