LXR linux/include/net/netns/xfrm.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef __NETNS_XFRM_H
   3#define __NETNS_XFRM_H
   4
   5#include <linux/list.h>
   6#include <linux/wait.h>
   7#include <linux/workqueue.h>
   8#include <linux/rhashtable-types.h>
   9#include <linux/xfrm.h>
  10#include <net/dst_ops.h>
  11
  12struct ctl_table_header;
  13
  14struct xfrm_policy_hash {
  15        struct hlist_head       __rcu *table;
  16        unsigned int            hmask;
  17        u8                      dbits4;
  18        u8                      sbits4;
  19        u8                      dbits6;
  20        u8                      sbits6;
  21};
  22
  23struct xfrm_policy_hthresh {
  24        struct work_struct      work;
  25        seqlock_t               lock;
  26        u8                      lbits4;
  27        u8                      rbits4;
  28        u8                      lbits6;
  29        u8                      rbits6;
  30};
  31
  32struct netns_xfrm {
  33        struct list_head        state_all;
  34        /*
  35         * Hash table to find appropriate SA towards given target (endpoint of
  36         * tunnel or destination of transport mode) allowed by selector.
  37         *
  38         * Main use is finding SA after policy selected tunnel or transport
  39         * mode. Also, it can be used by ah/esp icmp error handler to find
  40         * offending SA.
  41         */
  42        struct hlist_head       __rcu *state_bydst;
  43        struct hlist_head       __rcu *state_bysrc;
  44        struct hlist_head       __rcu *state_byspi;
  45        struct hlist_head       __rcu *state_byseq;
  46        unsigned int            state_hmask;
  47        unsigned int            state_num;
  48        struct work_struct      state_hash_work;
  49
  50        struct list_head        policy_all;
  51        struct hlist_head       *policy_byidx;
  52        unsigned int            policy_idx_hmask;
  53        struct hlist_head       policy_inexact[XFRM_POLICY_MAX];
  54        struct xfrm_policy_hash policy_bydst[XFRM_POLICY_MAX];
  55        unsigned int            policy_count[XFRM_POLICY_MAX * 2];
  56        struct work_struct      policy_hash_work;
  57        struct xfrm_policy_hthresh policy_hthresh;
  58        struct list_head        inexact_bins;
  59
  60
  61        struct sock             *nlsk;
  62        struct sock             *nlsk_stash;
  63
  64        u32                     sysctl_aevent_etime;
  65        u32                     sysctl_aevent_rseqth;
  66        int                     sysctl_larval_drop;
  67        u32                     sysctl_acq_expires;
  68
  69        u8                      policy_default;
  70#define XFRM_POL_DEFAULT_IN     1
  71#define XFRM_POL_DEFAULT_OUT    2
  72#define XFRM_POL_DEFAULT_FWD    4
  73#define XFRM_POL_DEFAULT_MASK   7
  74
  75#ifdef CONFIG_SYSCTL
  76        struct ctl_table_header *sysctl_hdr;
  77#endif
  78
  79        struct dst_ops          xfrm4_dst_ops;
  80#if IS_ENABLED(CONFIG_IPV6)
  81        struct dst_ops          xfrm6_dst_ops;
  82#endif
  83        spinlock_t              xfrm_state_lock;
  84        seqcount_spinlock_t     xfrm_state_hash_generation;
  85        seqcount_spinlock_t     xfrm_policy_hash_generation;
  86
  87        spinlock_t xfrm_policy_lock;
  88        struct mutex xfrm_cfg_mutex;
  89};
  90
  91#endif
  92