/*
   * SELinux services exported to the rest of the kernel.
   *
   * Author: James Morris <jmorris@redhat.com>
   *
   * Copyright (C) 2005 Red Hat, Inc., James Morris <jmorris@redhat.com>
   * Copyright (C) 2006 Trusted Computer Solutions, Inc. <dgoeddel@trustedcs.com>

   * Copyright (C) 2006 IBM Corporation, Timothy R. Chavez <tinytim@us.ibm.com>

   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License version 2,
   * as published by the Free Software Foundation.
   */
  #ifndef _LINUX_SELINUX_H
  #define _LINUX_SELINUX_H
  
  struct selinux_audit_rule;
  struct audit_context;

  struct kern_ipc_perm;

  
  #ifdef CONFIG_SECURITY_SELINUX
  
  /**

   *     selinux_string_to_sid - map a security context string to a security ID
   *     @str: the security context string to be mapped
   *     @sid: ID value returned via this.
   *
   *     Returns 0 if successful, with the SID stored in sid.  A value
   *     of zero for sid indicates no SID could be determined (but no error
   *     occurred).
   */
  int selinux_string_to_sid(char *str, u32 *sid);
  
  /**

   *     selinux_secmark_relabel_packet_permission - secmark permission check
   *     @sid: SECMARK ID value to be applied to network packet

   *

   *     Returns 0 if the current task is allowed to set the SECMARK label of
   *     packets with the supplied security ID.  Note that it is implicit that
   *     the packet is always being relabeled from the default unlabeled value,
   *     and that the access control decision is made in the AVC.

   */

  int selinux_secmark_relabel_packet_permission(u32 sid);

  /**
   *     selinux_secmark_refcount_inc - increments the secmark use counter
   *
   *     SELinux keeps track of the current SECMARK targets in use so it knows
   *     when to apply SECMARK label access checks to network packets.  This
   *     function incements this reference count to indicate that a new SECMARK
   *     target has been configured.
   */
  void selinux_secmark_refcount_inc(void);
  
  /**
   *     selinux_secmark_refcount_dec - decrements the secmark use counter
   *
   *     SELinux keeps track of the current SECMARK targets in use so it knows
   *     when to apply SECMARK label access checks to network packets.  This
   *     function decements this reference count to indicate that one of the
   *     existing SECMARK targets has been removed/flushed.
   */
  void selinux_secmark_refcount_dec(void);

  
  /**
   * selinux_is_enabled - is SELinux enabled?
   */
  bool selinux_is_enabled(void);

  #else

  static inline int selinux_string_to_sid(const char *str, u32 *sid)
  {
         *sid = 0;
         return 0;
  }

  static inline int selinux_secmark_relabel_packet_permission(u32 sid)

  {
  	return 0;
  }

  static inline void selinux_secmark_refcount_inc(void)
  {
  	return;
  }
  
  static inline void selinux_secmark_refcount_dec(void)
  {
  	return;
  }

  static inline bool selinux_is_enabled(void)

  {
  	return false;
  }

  #endif	/* CONFIG_SECURITY_SELINUX */
  
  #endif /* _LINUX_SELINUX_H */