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
12 struct ctl_table_header;
13
14 struct 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
23 struct 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
32 struct 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 unsigned int idx_generator;
54 struct hlist_head policy_inexact[XFRM_POLICY_MAX];
55 struct xfrm_policy_hash policy_bydst[XFRM_POLICY_MAX];
56 unsigned int policy_count[XFRM_POLICY_MAX * 2];
57 struct work_struct policy_hash_work;
58 struct xfrm_policy_hthresh policy_hthresh;
59 struct list_head inexact_bins;
60
61
62 struct sock *nlsk;
63 struct sock *nlsk_stash;
64
65 u32 sysctl_aevent_etime;
66 u32 sysctl_aevent_rseqth;
67 int sysctl_larval_drop;
68 u32 sysctl_acq_expires;
69
70 u8 policy_default[XFRM_POLICY_MAX];
71
72 #ifdef CONFIG_SYSCTL
73 struct ctl_table_header *sysctl_hdr;
74 #endif
75
76 struct dst_ops xfrm4_dst_ops;
77 #if IS_ENABLED(CONFIG_IPV6)
78 struct dst_ops xfrm6_dst_ops;
79 #endif
80 spinlock_t xfrm_state_lock;
81 seqcount_spinlock_t xfrm_state_hash_generation;
82 seqcount_spinlock_t xfrm_policy_hash_generation;
83
84 spinlock_t xfrm_policy_lock;
85 struct mutex xfrm_cfg_mutex;
86 struct delayed_work nat_keepalive_work;
87 };
88
89 #endif
90
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