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
 
 
10int selinux_xfrm_policy_alloc(struct xfrm_sec_ctx **ctxp,
11			      struct xfrm_user_sec_ctx *sec_ctx);
 
12int selinux_xfrm_policy_clone(struct xfrm_sec_ctx *old_ctx,
13			      struct xfrm_sec_ctx **new_ctxp);
14void selinux_xfrm_policy_free(struct xfrm_sec_ctx *ctx);
15int selinux_xfrm_policy_delete(struct xfrm_sec_ctx *ctx);
16int selinux_xfrm_state_alloc(struct xfrm_state *x,
17	struct xfrm_user_sec_ctx *sec_ctx, u32 secid);
 
 
18void selinux_xfrm_state_free(struct xfrm_state *x);
19int selinux_xfrm_state_delete(struct xfrm_state *x);
20int selinux_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir);
21int selinux_xfrm_state_pol_flow_match(struct xfrm_state *x,
22			struct xfrm_policy *xp, const struct flowi *fl);
23
24/*
25 * Extract the security blob from the sock (it's actually on the socket)
26 */
27static inline struct inode_security_struct *get_sock_isec(struct sock *sk)
28{
29	if (!sk->sk_socket)
30		return NULL;
31
32	return SOCK_INODE(sk->sk_socket)->i_security;
33}
34
35#ifdef CONFIG_SECURITY_NETWORK_XFRM
36extern atomic_t selinux_xfrm_refcount;
37
38static inline int selinux_xfrm_enabled(void)
39{
40	return (atomic_read(&selinux_xfrm_refcount) > 0);
41}
42
43int selinux_xfrm_sock_rcv_skb(u32 sid, struct sk_buff *skb,
44			struct common_audit_data *ad);
45int selinux_xfrm_postroute_last(u32 isec_sid, struct sk_buff *skb,
46			struct common_audit_data *ad, u8 proto);
47int selinux_xfrm_decode_session(struct sk_buff *skb, u32 *sid, int ckall);
 
48
49static inline void selinux_xfrm_notify_policyload(void)
50{
51	atomic_inc(&flow_cache_genid);
 
 
 
 
 
52}
53#else
54static inline int selinux_xfrm_enabled(void)
55{
56	return 0;
57}
58
59static inline int selinux_xfrm_sock_rcv_skb(u32 isec_sid, struct sk_buff *skb,
60			struct common_audit_data *ad)
61{
62	return 0;
63}
64
65static inline int selinux_xfrm_postroute_last(u32 isec_sid, struct sk_buff *skb,
66			struct common_audit_data *ad, u8 proto)
 
67{
68	return 0;
69}
70
71static inline int selinux_xfrm_decode_session(struct sk_buff *skb, u32 *sid, int ckall)
 
72{
73	*sid = SECSID_NULL;
74	return 0;
75}
76
77static inline void selinux_xfrm_notify_policyload(void)
78{
79}
80#endif
81
82static inline void selinux_skb_xfrm_sid(struct sk_buff *skb, u32 *sid)
83{
84	int err = selinux_xfrm_decode_session(skb, sid, 0);
85	BUG_ON(err);
86}
 
87
88#endif /* _SELINUX_XFRM_H_ */

 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 *fl);
 
 
 
 
 
 
 
 
 
 
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_ */