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 *sec_ctx); 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 *sec_ctx, u32 secid); 20 void selinux_xfrm_state_free(struct xfrm_state *x); 21 int selinux_xfrm_state_delete(struct xfrm_state *x); 22 int selinux_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir); 23 int 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 */ 29 static 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 38 extern atomic_t selinux_xfrm_refcount; 39 40 static inline int selinux_xfrm_enabled(void) 41 { 42 return (atomic_read(&selinux_xfrm_refcount) > 0); 43 } 44 45 int selinux_xfrm_sock_rcv_skb(u32 sid, struct sk_buff *skb, 46 struct common_audit_data *ad); 47 int selinux_xfrm_postroute_last(u32 isec_sid, struct sk_buff *skb, 48 struct common_audit_data *ad, u8 proto); 49 int selinux_xfrm_decode_session(struct sk_buff *skb, u32 *sid, int ckall); 50 51 static inline void selinux_xfrm_notify_policyload(void) 52 { 53 atomic_inc(&flow_cache_genid); 54 rt_genid_bump(&init_net); 55 } 56 #else 57 static inline int selinux_xfrm_enabled(void) 58 { 59 return 0; 60 } 61 62 static inline int selinux_xfrm_sock_rcv_skb(u32 isec_sid, struct sk_buff *skb, 63 struct common_audit_data *ad) 64 { 65 return 0; 66 } 67 68 static inline int selinux_xfrm_postroute_last(u32 isec_sid, struct sk_buff *skb, 69 struct common_audit_data *ad, u8 proto) 70 { 71 return 0; 72 } 73 74 static inline int selinux_xfrm_decode_session(struct sk_buff *skb, u32 *sid, int ckall) 75 { 76 *sid = SECSID_NULL; 77 return 0; 78 } 79 80 static inline void selinux_xfrm_notify_policyload(void) 81 { 82 } 83 #endif 84 85 static inline void selinux_skb_xfrm_sid(struct sk_buff *skb, u32 *sid) 86 { 87 int err = selinux_xfrm_decode_session(skb, sid, 0); 88 BUG_ON(err); 89 } 90 91 #endif /* _SELINUX_XFRM_H_ */ 92