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/*
* AppArmor security module
*
* This file contains AppArmor security identifier (secid) manipulation fns
*
* Copyright 2009-2010 Canonical Ltd.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation, version 2 of the
* License.
*
*
* AppArmor allocates a unique secid for every profile loaded. If a profile
* is replaced it receives the secid of the profile it is replacing.
*
* The secid value of 0 is invalid.
*/
#include <linux/spinlock.h>
#include <linux/errno.h>
#include <linux/err.h>
#include "include/secid.h"
/* global counter from which secids are allocated */
static u32 global_secid;
static DEFINE_SPINLOCK(secid_lock);
/* TODO FIXME: add secid to profile mapping, and secid recycling */
/**
* aa_alloc_secid - allocate a new secid for a profile
*/
u32 aa_alloc_secid(void)
{
u32 secid;
/*
* TODO FIXME: secid recycling - part of profile mapping table
*/
spin_lock(&secid_lock);
secid = (++global_secid);
spin_unlock(&secid_lock);
return secid;
}
/**
* aa_free_secid - free a secid
* @secid: secid to free
*/
void aa_free_secid(u32 secid)
{
; /* NOP ATM */
}
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