1/*
2 * SELinux support for the XFRM LSM hooks
3 *
4 * Author : Trent Jaeger, <jaegert@us.ibm.com>
5 * Updated : Venkat Yekkirala, <vyekkirala@TrustedCS.com>
6 */
7#ifndef _SELINUX_XFRM_H_
8#define _SELINUX_XFRM_H_
9
10#include <net/flow.h>
11
12int selinux_xfrm_policy_alloc(struct xfrm_sec_ctx **ctxp,
13			      struct xfrm_user_sec_ctx *uctx,
14			      gfp_t gfp);
15int selinux_xfrm_policy_clone(struct xfrm_sec_ctx *old_ctx,
16			      struct xfrm_sec_ctx **new_ctxp);
17void selinux_xfrm_policy_free(struct xfrm_sec_ctx *ctx);
18int selinux_xfrm_policy_delete(struct xfrm_sec_ctx *ctx);
19int selinux_xfrm_state_alloc(struct xfrm_state *x,
20			     struct xfrm_user_sec_ctx *uctx);
21int selinux_xfrm_state_alloc_acquire(struct xfrm_state *x,
22				     struct xfrm_sec_ctx *polsec, u32 secid);
23void selinux_xfrm_state_free(struct xfrm_state *x);
24int selinux_xfrm_state_delete(struct xfrm_state *x);
25int selinux_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir);
26int selinux_xfrm_state_pol_flow_match(struct xfrm_state *x,
27				      struct xfrm_policy *xp,
28				      const struct flowi *fl);
29
30#ifdef CONFIG_SECURITY_NETWORK_XFRM
31extern atomic_t selinux_xfrm_refcount;
32
33static inline int selinux_xfrm_enabled(void)
34{
35	return (atomic_read(&selinux_xfrm_refcount) > 0);
36}
37
38int selinux_xfrm_sock_rcv_skb(u32 sk_sid, struct sk_buff *skb,
39			      struct common_audit_data *ad);
40int selinux_xfrm_postroute_last(u32 sk_sid, struct sk_buff *skb,
41				struct common_audit_data *ad, u8 proto);
42int selinux_xfrm_decode_session(struct sk_buff *skb, u32 *sid, int ckall);
43int selinux_xfrm_skb_sid(struct sk_buff *skb, u32 *sid);
44
45static inline void selinux_xfrm_notify_policyload(void)
46{
47	struct net *net;
48
49	rtnl_lock();
50	for_each_net(net) {
51		atomic_inc(&net->xfrm.flow_cache_genid);
52		rt_genid_bump_all(net);
53	}
54	rtnl_unlock();
55}
56#else
57static inline int selinux_xfrm_enabled(void)
58{
59	return 0;
60}
61
62static inline int selinux_xfrm_sock_rcv_skb(u32 sk_sid, struct sk_buff *skb,
63					    struct common_audit_data *ad)
64{
65	return 0;
66}
67
68static inline int selinux_xfrm_postroute_last(u32 sk_sid, struct sk_buff *skb,
69					      struct common_audit_data *ad,
70					      u8 proto)
71{
72	return 0;
73}
74
75static inline int selinux_xfrm_decode_session(struct sk_buff *skb, u32 *sid,
76					      int ckall)
77{
78	*sid = SECSID_NULL;
79	return 0;
80}
81
82static inline void selinux_xfrm_notify_policyload(void)
83{
84}
85
86static inline int selinux_xfrm_skb_sid(struct sk_buff *skb, u32 *sid)
87{
88	*sid = SECSID_NULL;
89	return 0;
90}
91#endif
92
93#endif /* _SELINUX_XFRM_H_ */
94