1/*-
2 * Copyright (c) 2004 Networks Associates Technology, Inc.
3 * Copyright (c) 2005 SPARTA, Inc.
4 * All rights reserved.
5 *
6 * This software was developed for the FreeBSD Project in part by Network
7 * Associates Laboratories, the Security Research Division of Network
8 * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"),
9 * as part of the DARPA CHATS research program.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in the
18 *    documentation and/or other materials provided with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33#include <kern/zalloc.h>
34#include <security/_label.h>
35#include <sys/param.h>
36#include <sys/queue.h>
37#include <sys/systm.h>
38#include <security/mac_internal.h>
39
40static zone_t zone_label;
41
42void
43mac_labelzone_init(void)
44{
45
46	zone_label = zinit(sizeof(struct label),
47	    8192 * sizeof(struct label),
48	    sizeof(struct label), "MAC Labels");
49	zone_change(zone_label, Z_EXPAND, TRUE);
50	zone_change(zone_label, Z_EXHAUST, FALSE);
51	zone_change(zone_label, Z_CALLERACCT, FALSE);
52}
53
54struct label *
55mac_labelzone_alloc(int flags)
56{
57	struct label *l;
58
59	if (flags & MAC_NOWAIT)
60		l = (struct label *) zalloc_noblock(zone_label);
61	else
62		l = (struct label *) zalloc(zone_label);
63	if (l == NULL)
64		return (NULL);
65
66	bzero(l, sizeof(struct label));
67	l->l_flags = MAC_FLAG_INITIALIZED;
68	return (l);
69}
70
71void
72mac_labelzone_free(struct label *l)
73{
74
75	if (l == NULL)
76		panic("Free of NULL MAC label\n");
77
78	if ((l->l_flags & MAC_FLAG_INITIALIZED) == 0)
79		panic("Free of uninitialized label\n");
80	bzero(l, sizeof(struct label));
81	zfree(zone_label, l);
82}
83
84/*
85 * Functions used by policy modules to get and set label values.
86 */
87intptr_t
88mac_label_get(struct label *l, int slot)
89{
90	KASSERT(l != NULL, ("mac_label_get: NULL label"));
91
92	return ((intptr_t) (l->l_perpolicy[slot].l_ptr));
93}
94
95void
96mac_label_set(struct label *l, int slot, intptr_t v)
97{
98	KASSERT(l != NULL, ("mac_label_set: NULL label"));
99
100	l->l_perpolicy[slot].l_ptr = (void *) v;
101}
102
103