cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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tc_tunnel_key.h (2164B)

      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 */