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_sec_ctx **ctxp,
  11                               struct xfrm_user_sec_ctx *sec_ctx);
  12 int selinux_xfrm_policy_clone(struct xfrm_sec_ctx *old_ctx,
  13                               struct xfrm_sec_ctx **new_ctxp);
  14 void selinux_xfrm_policy_free(struct xfrm_sec_ctx *ctx);
  15 int selinux_xfrm_policy_delete(struct xfrm_sec_ctx *ctx);
  16 int selinux_xfrm_state_alloc(struct xfrm_state *x,
  17         struct xfrm_user_sec_ctx *sec_ctx, u32 secid);
  18 void selinux_xfrm_state_free(struct xfrm_state *x);
  19 int selinux_xfrm_state_delete(struct xfrm_state *x);
  20 int selinux_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir);
  21 int 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  */
  27 static 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
  36 extern atomic_t selinux_xfrm_refcount;
  37
  38 static inline int selinux_xfrm_enabled(void)
  39 {
  40         return (atomic_read(&selinux_xfrm_refcount) > 0);
  41 }
  42
  43 int selinux_xfrm_sock_rcv_skb(u32 sid, struct sk_buff *skb,
  44                         struct avc_audit_data *ad);
  45 int selinux_xfrm_postroute_last(u32 isec_sid, struct sk_buff *skb,
  46                         struct avc_audit_data *ad, u8 proto);
  47 int selinux_xfrm_decode_session(struct sk_buff *skb, u32 *sid, int ckall);
  48
  49 static inline void selinux_xfrm_notify_policyload(void)
  50 {
  51         atomic_inc(&flow_cache_genid);
  52 }
  53 #else
  54 static inline int selinux_xfrm_enabled(void)
  55 {
  56         return 0;
  57 }
  58
  59 static inline int selinux_xfrm_sock_rcv_skb(u32 isec_sid, struct sk_buff *skb,
  60                         struct avc_audit_data *ad)
  61 {
  62         return 0;
  63 }
  64
  65 static inline int selinux_xfrm_postroute_last(u32 isec_sid, struct sk_buff *skb,
  66                         struct avc_audit_data *ad, u8 proto)
  67 {
  68         return 0;
  69 }
  70
  71 static inline int selinux_xfrm_decode_session(struct sk_buff *skb, u32 *sid, int ckall)
  72 {
  73         *sid = SECSID_NULL;
  74         return 0;
  75 }
  76
  77 static inline void selinux_xfrm_notify_policyload(void)
  78 {
  79 }
  80 #endif
  81
  82 static 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_ */