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 	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[XFRM_POLICY_MAX];
70 
71 #ifdef CONFIG_SYSCTL
72 	struct ctl_table_header	*sysctl_hdr;
73 #endif
74 
75 	struct dst_ops		xfrm4_dst_ops;
76 #if IS_ENABLED(CONFIG_IPV6)
77 	struct dst_ops		xfrm6_dst_ops;
78 #endif
79 	spinlock_t		xfrm_state_lock;
80 	seqcount_spinlock_t	xfrm_state_hash_generation;
81 	seqcount_spinlock_t	xfrm_policy_hash_generation;
82 
83 	spinlock_t xfrm_policy_lock;
84 	struct mutex xfrm_cfg_mutex;
85 };
86 
87 #endif
88