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