security/selinux/exports.c

   1 /*
   2  * SELinux services exported to the rest of the kernel.
   3  *
   4  * Author: James Morris <jmorris@redhat.com>
   5  *
   6  * Copyright (C) 2005 Red Hat, Inc., James Morris <jmorris@redhat.com>
   7  * Copyright (C) 2006 Trusted Computer Solutions, Inc. <dgoeddel@trustedcs.com>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2,
  11  * as published by the Free Software Foundation.
  12  */
  13 #include <linux/types.h>
  14 #include <linux/kernel.h>
  15 #include <linux/module.h>
  16 #include <linux/selinux.h>
  17 #include <linux/fs.h>
  18
  19 #include "security.h"
  20 #include "objsec.h"
  21
  22 void selinux_task_ctxid(struct task_struct *tsk, u32 *ctxid)
  23 {
  24         struct task_security_struct *tsec = tsk->security;
  25         if (selinux_enabled)
  26                 *ctxid = tsec->sid;
  27         else
  28                 *ctxid = 0;
  29 }
  30
  31 int selinux_ctxid_to_string(u32 ctxid, char **ctx, u32 *ctxlen)
  32 {
  33         if (selinux_enabled)
  34                 return security_sid_to_context(ctxid, ctx, ctxlen);
  35         else {
  36                 *ctx = NULL;
  37                 *ctxlen = 0;
  38         }
  39
  40         return 0;
  41 }
  42
  43 void selinux_get_inode_sid(const struct inode *inode, u32 *sid)
  44 {
  45         if (selinux_enabled) {
  46                 struct inode_security_struct *isec = inode->i_security;
  47                 *sid = isec->sid;
  48                 return;
  49         }
  50         *sid = 0;
  51 }
  52