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 #include <net/flow.h>
  11
  12 int selinux_xfrm_policy_alloc(struct xfrm_sec_ctx **ctxp,
  13                               struct xfrm_user_sec_ctx *uctx);
  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 *uctx);
  20 int selinux_xfrm_state_alloc_acquire(struct xfrm_state *x,
  21                                      struct xfrm_sec_ctx *polsec, u32 secid);
  22 void selinux_xfrm_state_free(struct xfrm_state *x);
  23 int selinux_xfrm_state_delete(struct xfrm_state *x);
  24 int selinux_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir);
  25 int selinux_xfrm_state_pol_flow_match(struct xfrm_state *x,
  26                                       struct xfrm_policy *xp,
  27                                       const struct flowi *fl);
  28
  29 #ifdef CONFIG_SECURITY_NETWORK_XFRM
  30 extern atomic_t selinux_xfrm_refcount;
  31
  32 static inline int selinux_xfrm_enabled(void)
  33 {
  34         return (atomic_read(&selinux_xfrm_refcount) > 0);
  35 }
  36
  37 int selinux_xfrm_sock_rcv_skb(u32 sk_sid, struct sk_buff *skb,
  38                               struct common_audit_data *ad);
  39 int selinux_xfrm_postroute_last(u32 sk_sid, struct sk_buff *skb,
  40                                 struct common_audit_data *ad, u8 proto);
  41 int selinux_xfrm_decode_session(struct sk_buff *skb, u32 *sid, int ckall);
  42
  43 static inline void selinux_xfrm_notify_policyload(void)
  44 {
  45         struct net *net;
  46
  47         atomic_inc(&flow_cache_genid);
  48         rtnl_lock();
  49         for_each_net(net)
  50                 rt_genid_bump_all(net);
  51         rtnl_unlock();
  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 sk_sid, struct sk_buff *skb,
  60                                             struct common_audit_data *ad)
  61 {
  62         return 0;
  63 }
  64
  65 static inline int selinux_xfrm_postroute_last(u32 sk_sid, struct sk_buff *skb,
  66                                               struct common_audit_data *ad,
  67                                               u8 proto)
  68 {
  69         return 0;
  70 }
  71
  72 static inline int selinux_xfrm_decode_session(struct sk_buff *skb, u32 *sid,
  73                                               int ckall)
  74 {
  75         *sid = SECSID_NULL;
  76         return 0;
  77 }
  78
  79 static inline void selinux_xfrm_notify_policyload(void)
  80 {
  81 }
  82 #endif
  83
  84 static inline int selinux_skb_xfrm_sid(struct sk_buff *skb, u32 *sid)
  85 {
  86         return selinux_xfrm_decode_session(skb, sid, 0);
  87 }
  88
  89 #endif /* _SELINUX_XFRM_H_ */