1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * SELinux support for the XFRM LSM hooks
4 *
5 * Author : Trent Jaeger, <jaegert@us.ibm.com>
6 * Updated : Venkat Yekkirala, <vyekkirala@TrustedCS.com>
7 */
8#ifndef _SELINUX_XFRM_H_
9#define _SELINUX_XFRM_H_
10
11#include <net/flow.h>
12
13int selinux_xfrm_policy_alloc(struct xfrm_sec_ctx **ctxp,
14			      struct xfrm_user_sec_ctx *uctx,
15			      gfp_t gfp);
16int selinux_xfrm_policy_clone(struct xfrm_sec_ctx *old_ctx,
17			      struct xfrm_sec_ctx **new_ctxp);
18void selinux_xfrm_policy_free(struct xfrm_sec_ctx *ctx);
19int selinux_xfrm_policy_delete(struct xfrm_sec_ctx *ctx);
20int selinux_xfrm_state_alloc(struct xfrm_state *x,
21			     struct xfrm_user_sec_ctx *uctx);
22int selinux_xfrm_state_alloc_acquire(struct xfrm_state *x,
23				     struct xfrm_sec_ctx *polsec, u32 secid);
24void selinux_xfrm_state_free(struct xfrm_state *x);
25int selinux_xfrm_state_delete(struct xfrm_state *x);
26int selinux_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir);
27int selinux_xfrm_state_pol_flow_match(struct xfrm_state *x,
28				      struct xfrm_policy *xp,
29				      const struct flowi_common *flic);
30
31#ifdef CONFIG_SECURITY_NETWORK_XFRM
32extern atomic_t selinux_xfrm_refcount;
33
34static inline int selinux_xfrm_enabled(void)
35{
36	return (atomic_read(&selinux_xfrm_refcount) > 0);
37}
38
39int selinux_xfrm_sock_rcv_skb(u32 sk_sid, struct sk_buff *skb,
40			      struct common_audit_data *ad);
41int selinux_xfrm_postroute_last(u32 sk_sid, struct sk_buff *skb,
42				struct common_audit_data *ad, u8 proto);
43int selinux_xfrm_decode_session(struct sk_buff *skb, u32 *sid, int ckall);
44int selinux_xfrm_skb_sid(struct sk_buff *skb, u32 *sid);
45
46static inline void selinux_xfrm_notify_policyload(void)
47{
48	struct net *net;
49
50	down_read(&net_rwsem);
51	for_each_net(net)
52		rt_genid_bump_all(net);
53	up_read(&net_rwsem);
54}
55#else
56static inline int selinux_xfrm_enabled(void)
57{
58	return 0;
59}
60
61static inline int selinux_xfrm_sock_rcv_skb(u32 sk_sid, struct sk_buff *skb,
62					    struct common_audit_data *ad)
63{
64	return 0;
65}
66
67static inline int selinux_xfrm_postroute_last(u32 sk_sid, struct sk_buff *skb,
68					      struct common_audit_data *ad,
69					      u8 proto)
70{
71	return 0;
72}
73
74static inline int selinux_xfrm_decode_session(struct sk_buff *skb, u32 *sid,
75					      int ckall)
76{
77	*sid = SECSID_NULL;
78	return 0;
79}
80
81static inline void selinux_xfrm_notify_policyload(void)
82{
83}
84
85static inline int selinux_xfrm_skb_sid(struct sk_buff *skb, u32 *sid)
86{
87	*sid = SECSID_NULL;
88	return 0;
89}
90#endif
91
92#endif /* _SELINUX_XFRM_H_ */
93