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