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 int selinux_xfrm_policy_alloc(struct xfrm_sec_ctx **ctxp,
11 struct xfrm_user_sec_ctx *sec_ctx);
12 int selinux_xfrm_policy_clone(struct xfrm_sec_ctx *old_ctx,
13 struct xfrm_sec_ctx **new_ctxp);
14 void selinux_xfrm_policy_free(struct xfrm_sec_ctx *ctx);
15 int selinux_xfrm_policy_delete(struct xfrm_sec_ctx *ctx);
16 int selinux_xfrm_state_alloc(struct xfrm_state *x,
17 struct xfrm_user_sec_ctx *sec_ctx, u32 secid);
18 void selinux_xfrm_state_free(struct xfrm_state *x);
19 int selinux_xfrm_state_delete(struct xfrm_state *x);
20 int selinux_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir);
21 int selinux_xfrm_state_pol_flow_match(struct xfrm_state *x,
22 struct xfrm_policy *xp, struct flowi *fl);
23
24 /*
25 * Extract the security blob from the sock (it's actually on the socket)
26 */
get_sock_isec(struct sock * sk)27 static 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
36 extern atomic_t selinux_xfrm_refcount;
37
selinux_xfrm_enabled(void)38 static inline int selinux_xfrm_enabled(void)
39 {
40 return (atomic_read(&selinux_xfrm_refcount) > 0);
41 }
42
43 int selinux_xfrm_sock_rcv_skb(u32 sid, struct sk_buff *skb,
44 struct avc_audit_data *ad);
45 int selinux_xfrm_postroute_last(u32 isec_sid, struct sk_buff *skb,
46 struct avc_audit_data *ad, u8 proto);
47 int selinux_xfrm_decode_session(struct sk_buff *skb, u32 *sid, int ckall);
48
selinux_xfrm_notify_policyload(void)49 static inline void selinux_xfrm_notify_policyload(void)
50 {
51 atomic_inc(&flow_cache_genid);
52 }
53 #else
selinux_xfrm_enabled(void)54 static inline int selinux_xfrm_enabled(void)
55 {
56 return 0;
57 }
58
selinux_xfrm_sock_rcv_skb(u32 isec_sid,struct sk_buff * skb,struct avc_audit_data * ad)59 static inline int selinux_xfrm_sock_rcv_skb(u32 isec_sid, struct sk_buff *skb,
60 struct avc_audit_data *ad)
61 {
62 return 0;
63 }
64
selinux_xfrm_postroute_last(u32 isec_sid,struct sk_buff * skb,struct avc_audit_data * ad,u8 proto)65 static inline int selinux_xfrm_postroute_last(u32 isec_sid, struct sk_buff *skb,
66 struct avc_audit_data *ad, u8 proto)
67 {
68 return 0;
69 }
70
selinux_xfrm_decode_session(struct sk_buff * skb,u32 * sid,int ckall)71 static inline int selinux_xfrm_decode_session(struct sk_buff *skb, u32 *sid, int ckall)
72 {
73 *sid = SECSID_NULL;
74 return 0;
75 }
76
selinux_xfrm_notify_policyload(void)77 static inline void selinux_xfrm_notify_policyload(void)
78 {
79 }
80 #endif
81
selinux_skb_xfrm_sid(struct sk_buff * skb,u32 * sid)82 static 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_ */
89