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The basic routines and defines for AppArmor policy. AppArmor policy
is defined by a few basic components.
profiles - the basic unit of confinement contain all the information
to enforce policy on a task
Profiles tend to be named after an executable that they
will attach to but this is not required.
namespaces - a container for a set of profiles that will be used
during attachment and transitions between profiles.
sids - which provide a unique id for each profile
Signed-off-by: John Johansen <john.johansen@canonical.com>
Signed-off-by: James Morris <jmorris@namei.org>
56 lines
1.2 KiB
C
56 lines
1.2 KiB
C
/*
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* AppArmor security module
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*
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* This file contains AppArmor security identifier (sid) manipulation fns
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*
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* Copyright 2009-2010 Canonical Ltd.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation, version 2 of the
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* License.
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*
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*
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* AppArmor allocates a unique sid for every profile loaded. If a profile
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* is replaced it receives the sid of the profile it is replacing.
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*
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* The sid value of 0 is invalid.
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*/
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#include <linux/spinlock.h>
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#include <linux/errno.h>
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#include <linux/err.h>
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#include "include/sid.h"
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/* global counter from which sids are allocated */
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static u32 global_sid;
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static DEFINE_SPINLOCK(sid_lock);
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/* TODO FIXME: add sid to profile mapping, and sid recycling */
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/**
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* aa_alloc_sid - allocate a new sid for a profile
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*/
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u32 aa_alloc_sid(void)
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{
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u32 sid;
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/*
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* TODO FIXME: sid recycling - part of profile mapping table
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*/
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spin_lock(&sid_lock);
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sid = (++global_sid);
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spin_unlock(&sid_lock);
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return sid;
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}
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/**
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* aa_free_sid - free a sid
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* @sid: sid to free
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*/
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void aa_free_sid(u32 sid)
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{
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; /* NOP ATM */
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}
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