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 <linux/lsm_audit.h>
12#include <net/flow.h>
13#include <net/xfrm.h>
14
15int selinux_xfrm_policy_alloc(struct xfrm_sec_ctx **ctxp,
16			      struct xfrm_user_sec_ctx *uctx,
17			      gfp_t gfp);
18int selinux_xfrm_policy_clone(struct xfrm_sec_ctx *old_ctx,
19			      struct xfrm_sec_ctx **new_ctxp);
20void selinux_xfrm_policy_free(struct xfrm_sec_ctx *ctx);
21int selinux_xfrm_policy_delete(struct xfrm_sec_ctx *ctx);
22int selinux_xfrm_state_alloc(struct xfrm_state *x,
23			     struct xfrm_user_sec_ctx *uctx);
24int selinux_xfrm_state_alloc_acquire(struct xfrm_state *x,
25				     struct xfrm_sec_ctx *polsec, u32 secid);
26void selinux_xfrm_state_free(struct xfrm_state *x);
27int selinux_xfrm_state_delete(struct xfrm_state *x);
28int selinux_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid);
29int selinux_xfrm_state_pol_flow_match(struct xfrm_state *x,
30				      struct xfrm_policy *xp,
31				      const struct flowi_common *flic);
 
 
 
 
 
 
 
 
 
 
32
33#ifdef CONFIG_SECURITY_NETWORK_XFRM
34extern atomic_t selinux_xfrm_refcount;
35
36static inline int selinux_xfrm_enabled(void)
37{
38	return (atomic_read(&selinux_xfrm_refcount) > 0);
39}
40
41int selinux_xfrm_sock_rcv_skb(u32 sk_sid, struct sk_buff *skb,
42			      struct common_audit_data *ad);
43int selinux_xfrm_postroute_last(u32 sk_sid, struct sk_buff *skb,
44				struct common_audit_data *ad, u8 proto);
45int selinux_xfrm_decode_session(struct sk_buff *skb, u32 *sid, int ckall);
46int selinux_xfrm_skb_sid(struct sk_buff *skb, u32 *sid);
47
48static inline void selinux_xfrm_notify_policyload(void)
49{
50	struct net *net;
51
52	down_read(&net_rwsem);
53	for_each_net(net)
54		rt_genid_bump_all(net);
55	up_read(&net_rwsem);
56}
57#else
58static inline int selinux_xfrm_enabled(void)
59{
60	return 0;
61}
62
63static inline int selinux_xfrm_sock_rcv_skb(u32 sk_sid, struct sk_buff *skb,
64					    struct common_audit_data *ad)
65{
66	return 0;
67}
68
69static inline int selinux_xfrm_postroute_last(u32 sk_sid, struct sk_buff *skb,
70					      struct common_audit_data *ad,
71					      u8 proto)
72{
73	return 0;
74}
75
76static inline int selinux_xfrm_decode_session(struct sk_buff *skb, u32 *sid,
77					      int ckall)
78{
79	*sid = SECSID_NULL;
80	return 0;
81}
82
83static inline void selinux_xfrm_notify_policyload(void)
84{
85}
 
86
87static inline int selinux_xfrm_skb_sid(struct sk_buff *skb, u32 *sid)
88{
89	*sid = SECSID_NULL;
90	return 0;
91}
92#endif
93
94#endif /* _SELINUX_XFRM_H_ */

 
 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 *sec_ctx);
 
14int selinux_xfrm_policy_clone(struct xfrm_sec_ctx *old_ctx,
15			      struct xfrm_sec_ctx **new_ctxp);
16void selinux_xfrm_policy_free(struct xfrm_sec_ctx *ctx);
17int selinux_xfrm_policy_delete(struct xfrm_sec_ctx *ctx);
18int selinux_xfrm_state_alloc(struct xfrm_state *x,
19	struct xfrm_user_sec_ctx *sec_ctx, u32 secid);
 
 
20void selinux_xfrm_state_free(struct xfrm_state *x);
21int selinux_xfrm_state_delete(struct xfrm_state *x);
22int selinux_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir);
23int selinux_xfrm_state_pol_flow_match(struct xfrm_state *x,
24			struct xfrm_policy *xp, const struct flowi *fl);
25
26/*
27 * Extract the security blob from the sock (it's actually on the socket)
28 */
29static inline struct inode_security_struct *get_sock_isec(struct sock *sk)
30{
31	if (!sk->sk_socket)
32		return NULL;
33
34	return SOCK_INODE(sk->sk_socket)->i_security;
35}
36
37#ifdef CONFIG_SECURITY_NETWORK_XFRM
38extern atomic_t selinux_xfrm_refcount;
39
40static inline int selinux_xfrm_enabled(void)
41{
42	return (atomic_read(&selinux_xfrm_refcount) > 0);
43}
44
45int selinux_xfrm_sock_rcv_skb(u32 sid, struct sk_buff *skb,
46			struct common_audit_data *ad);
47int selinux_xfrm_postroute_last(u32 isec_sid, struct sk_buff *skb,
48			struct common_audit_data *ad, u8 proto);
49int selinux_xfrm_decode_session(struct sk_buff *skb, u32 *sid, int ckall);
 
50
51static inline void selinux_xfrm_notify_policyload(void)
52{
53	atomic_inc(&flow_cache_genid);
 
 
 
 
 
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 isec_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 isec_sid, struct sk_buff *skb,
68			struct common_audit_data *ad, u8 proto)
 
69{
70	return 0;
71}
72
73static inline int selinux_xfrm_decode_session(struct sk_buff *skb, u32 *sid, int ckall)
 
74{
75	*sid = SECSID_NULL;
76	return 0;
77}
78
79static inline void selinux_xfrm_notify_policyload(void)
80{
81}
82#endif
83
84static inline void selinux_skb_xfrm_sid(struct sk_buff *skb, u32 *sid)
85{
86	int err = selinux_xfrm_decode_session(skb, sid, 0);
87	BUG_ON(err);
88}
 
89
90#endif /* _SELINUX_XFRM_H_ */