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 *sec_ctx);
  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 *sec_ctx, u32 secid);
  20 void selinux_xfrm_state_free(struct xfrm_state *x);
  21 int selinux_xfrm_state_delete(struct xfrm_state *x);
  22 int selinux_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir);
  23 int selinux_xfrm_state_pol_flow_match(struct xfrm_state *x,
  24                         struct xfrm_policy *xp, const struct flowi *fl);
  25
  26 /*
  27  * Extract the security blob from the sock (it's actually on the socket)
  28  */
  29 static inline struct inode_security_struct *get_sock_isec(struct sock *sk)
  30 {
  31         if (!sk->sk_socket)
  32                 return NULL;
  33
  34         return SOCK_INODE(sk->sk_socket)->i_security;
  35 }
  36
  37 #ifdef CONFIG_SECURITY_NETWORK_XFRM
  38 extern atomic_t selinux_xfrm_refcount;
  39
  40 static inline int selinux_xfrm_enabled(void)
  41 {
  42         return (atomic_read(&selinux_xfrm_refcount) > 0);
  43 }
  44
  45 int selinux_xfrm_sock_rcv_skb(u32 sid, struct sk_buff *skb,
  46                         struct common_audit_data *ad);
  47 int selinux_xfrm_postroute_last(u32 isec_sid, struct sk_buff *skb,
  48                         struct common_audit_data *ad, u8 proto);
  49 int selinux_xfrm_decode_session(struct sk_buff *skb, u32 *sid, int ckall);
  50
  51 static inline void selinux_xfrm_notify_policyload(void)
  52 {
  53         atomic_inc(&flow_cache_genid);
  54         rt_genid_bump(&init_net);
  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 isec_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 isec_sid, struct sk_buff *skb,
  69                         struct common_audit_data *ad, u8 proto)
  70 {
  71         return 0;
  72 }
  73
  74 static inline int selinux_xfrm_decode_session(struct sk_buff *skb, u32 *sid, int ckall)
  75 {
  76         *sid = SECSID_NULL;
  77         return 0;
  78 }
  79
  80 static inline void selinux_xfrm_notify_policyload(void)
  81 {
  82 }
  83 #endif
  84
  85 static inline void selinux_skb_xfrm_sid(struct sk_buff *skb, u32 *sid)
  86 {
  87         int err = selinux_xfrm_decode_session(skb, sid, 0);
  88         BUG_ON(err);
  89 }
  90
  91 #endif /* _SELINUX_XFRM_H_ */