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, 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_ */ 89