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                               gfp_t gfp);
  15 int selinux_xfrm_policy_clone(struct xfrm_sec_ctx *old_ctx,
  16                               struct xfrm_sec_ctx **new_ctxp);
  17 void selinux_xfrm_policy_free(struct xfrm_sec_ctx *ctx);
  18 int selinux_xfrm_policy_delete(struct xfrm_sec_ctx *ctx);
  19 int selinux_xfrm_state_alloc(struct xfrm_state *x,
  20                              struct xfrm_user_sec_ctx *uctx);
  21 int selinux_xfrm_state_alloc_acquire(struct xfrm_state *x,
  22                                      struct xfrm_sec_ctx *polsec, u32 secid);
  23 void selinux_xfrm_state_free(struct xfrm_state *x);
  24 int selinux_xfrm_state_delete(struct xfrm_state *x);
  25 int selinux_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir);
  26 int selinux_xfrm_state_pol_flow_match(struct xfrm_state *x,
  27                                       struct xfrm_policy *xp,
  28                                       const struct flowi *fl);
  29
  30 #ifdef CONFIG_SECURITY_NETWORK_XFRM
  31 extern atomic_t selinux_xfrm_refcount;
  32
  33 static inline int selinux_xfrm_enabled(void)
  34 {
  35         return (atomic_read(&selinux_xfrm_refcount) > 0);
  36 }
  37
  38 int selinux_xfrm_sock_rcv_skb(u32 sk_sid, struct sk_buff *skb,
  39                               struct common_audit_data *ad);
  40 int selinux_xfrm_postroute_last(u32 sk_sid, struct sk_buff *skb,
  41                                 struct common_audit_data *ad, u8 proto);
  42 int selinux_xfrm_decode_session(struct sk_buff *skb, u32 *sid, int ckall);
  43 int selinux_xfrm_skb_sid(struct sk_buff *skb, u32 *sid);
  44
  45 static inline void selinux_xfrm_notify_policyload(void)
  46 {
  47         struct net *net;
  48
  49         rtnl_lock();
  50         for_each_net(net) {
  51                 atomic_inc(&net->xfrm.flow_cache_genid);
  52                 rt_genid_bump_all(net);
  53         }
  54         rtnl_unlock();
  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 sk_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 sk_sid, struct sk_buff *skb,
  69                                               struct common_audit_data *ad,
  70                                               u8 proto)
  71 {
  72         return 0;
  73 }
  74
  75 static inline int selinux_xfrm_decode_session(struct sk_buff *skb, u32 *sid,
  76                                               int ckall)
  77 {
  78         *sid = SECSID_NULL;
  79         return 0;
  80 }
  81
  82 static inline void selinux_xfrm_notify_policyload(void)
  83 {
  84 }
  85
  86 static inline int selinux_xfrm_skb_sid(struct sk_buff *skb, u32 *sid)
  87 {
  88         *sid = SECSID_NULL;
  89         return 0;
  90 }
  91 #endif
  92
  93 #endif /* _SELINUX_XFRM_H_ */