security/selinux/include/xfrm.h

   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 int selinux_xfrm_sock_rcv_skb(u32 sid, struct sk_buff *skb,
  36                         struct avc_audit_data *ad);
  37 int selinux_xfrm_postroute_last(u32 isec_sid, struct sk_buff *skb,
  38                         struct avc_audit_data *ad, u8 proto);
  39 int selinux_xfrm_decode_session(struct sk_buff *skb, u32 *sid, int ckall);
  40
  41 static inline void selinux_xfrm_notify_policyload(void)
  42 {
  43         atomic_inc(&flow_cache_genid);
  44 }
  45 #else
  46 static inline int selinux_xfrm_sock_rcv_skb(u32 isec_sid, struct sk_buff *skb,
  47                         struct avc_audit_data *ad)
  48 {
  49         return 0;
  50 }
  51
  52 static inline int selinux_xfrm_postroute_last(u32 isec_sid, struct sk_buff *skb,
  53                         struct avc_audit_data *ad, u8 proto)
  54 {
  55         return 0;
  56 }
  57
  58 static inline int selinux_xfrm_decode_session(struct sk_buff *skb, u32 *sid, int ckall)
  59 {
  60         *sid = SECSID_NULL;
  61         return 0;
  62 }
  63
  64 static inline void selinux_xfrm_notify_policyload(void)
  65 {
  66 }
  67 #endif
  68
  69 static inline void selinux_skb_xfrm_sid(struct sk_buff *skb, u32 *sid)
  70 {
  71         int err = selinux_xfrm_decode_session(skb, sid, 0);
  72         BUG_ON(err);
  73 }
  74
  75 #endif /* _SELINUX_XFRM_H_ */