108 lines
3.3 KiB
C
108 lines
3.3 KiB
C
/*-
|
|
* Copyright (c) 2003-2004 Networks Associates Technology, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This software was developed for the FreeBSD Project in part by Network
|
|
* Associates Laboratories, the Security Research Division of Network
|
|
* Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"),
|
|
* as part of the DARPA CHATS research program.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include "opt_mac.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/mac.h>
|
|
#include <sys/sysctl.h>
|
|
#include <sys/systm.h>
|
|
|
|
#include <vm/uma.h>
|
|
|
|
#include <security/mac/mac_framework.h>
|
|
#include <security/mac/mac_internal.h>
|
|
|
|
/*
|
|
* zone_label is the UMA zone from which all labels are allocated. Label
|
|
* structures are initialized to zero bytes so that policies see a NULL/0
|
|
* slot on first use, even if the policy is loaded after the label is
|
|
* allocated for an object.
|
|
*/
|
|
static uma_zone_t zone_label;
|
|
|
|
static int mac_labelzone_ctor(void *mem, int size, void *arg, int flags);
|
|
static void mac_labelzone_dtor(void *mem, int size, void *arg);
|
|
|
|
void
|
|
mac_labelzone_init(void)
|
|
{
|
|
|
|
zone_label = uma_zcreate("MAC labels", sizeof(struct label),
|
|
mac_labelzone_ctor, mac_labelzone_dtor, NULL, NULL,
|
|
UMA_ALIGN_PTR, 0);
|
|
}
|
|
|
|
static int
|
|
mac_labelzone_ctor(void *mem, int size, void *arg, int flags)
|
|
{
|
|
struct label *label;
|
|
|
|
KASSERT(size == sizeof(*label), ("mac_labelzone_ctor: wrong size\n"));
|
|
label = mem;
|
|
bzero(label, sizeof(*label));
|
|
label->l_flags = MAC_FLAG_INITIALIZED;
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
mac_labelzone_dtor(void *mem, int size, void *arg)
|
|
{
|
|
struct label *label;
|
|
|
|
KASSERT(size == sizeof(*label), ("mac_labelzone_dtor: wrong size\n"));
|
|
label = mem;
|
|
KASSERT(label->l_flags & MAC_FLAG_INITIALIZED,
|
|
("mac_labelzone_dtor: label not initialized"));
|
|
#ifdef DIAGNOSTIC
|
|
bzero(label, sizeof(*label));
|
|
#else
|
|
label->l_flags &= ~MAC_FLAG_INITIALIZED;
|
|
#endif
|
|
}
|
|
|
|
struct label *
|
|
mac_labelzone_alloc(int flags)
|
|
{
|
|
|
|
return (uma_zalloc(zone_label, flags));
|
|
}
|
|
|
|
void
|
|
mac_labelzone_free(struct label *label)
|
|
{
|
|
|
|
uma_zfree(zone_label, label);
|
|
}
|