LXR linux/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
  10int selinux_xfrm_policy_alloc(struct xfrm_sec_ctx **ctxp,
  11                              struct xfrm_user_sec_ctx *sec_ctx);
  12int selinux_xfrm_policy_clone(struct xfrm_sec_ctx *old_ctx,
  13                              struct xfrm_sec_ctx **new_ctxp);
  14void selinux_xfrm_policy_free(struct xfrm_sec_ctx *ctx);
  15int selinux_xfrm_policy_delete(struct xfrm_sec_ctx *ctx);
  16int selinux_xfrm_state_alloc(struct xfrm_state *x,
  17        struct xfrm_user_sec_ctx *sec_ctx, u32 secid);
  18void selinux_xfrm_state_free(struct xfrm_state *x);
  19int selinux_xfrm_state_delete(struct xfrm_state *x);
  20int selinux_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 fl_secid, u8 dir);
  21int 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 */
  27static 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
  36extern atomic_t selinux_xfrm_refcount;
  37
  38static inline int selinux_xfrm_enabled(void)
  39{
  40        return (atomic_read(&selinux_xfrm_refcount) > 0);
  41}
  42
  43int selinux_xfrm_sock_rcv_skb(u32 sid, struct sk_buff *skb,
  44                        struct common_audit_data *ad);
  45int selinux_xfrm_postroute_last(u32 isec_sid, struct sk_buff *skb,
  46                        struct common_audit_data *ad, u8 proto);
  47int selinux_xfrm_decode_session(struct sk_buff *skb, u32 *sid, int ckall);
  48
  49static inline void selinux_xfrm_notify_policyload(void)
  50{
  51        atomic_inc(&flow_cache_genid);
  52}
  53#else
  54static inline int selinux_xfrm_enabled(void)
  55{
  56        return 0;
  57}
  58
  59static inline int selinux_xfrm_sock_rcv_skb(u32 isec_sid, struct sk_buff *skb,
  60                        struct common_audit_data *ad)
  61{
  62        return 0;
  63}
  64
  65static inline int selinux_xfrm_postroute_last(u32 isec_sid, struct sk_buff *skb,
  66                        struct common_audit_data *ad, u8 proto)
  67{
  68        return 0;
  69}
  70
  71static inline int selinux_xfrm_decode_session(struct sk_buff *skb, u32 *sid, int ckall)
  72{
  73        *sid = SECSID_NULL;
  74        return 0;
  75}
  76
  77static inline void selinux_xfrm_notify_policyload(void)
  78{
  79}
  80#endif
  81
  82static 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_ */
  89