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 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_ */