1 /*-
2 * Copyright (c) 2003-2004 Networks Associates Technology, Inc.
3 * All rights reserved.
4 *
5 * This software was developed for the FreeBSD Project in part by Network
6 * Associates Laboratories, the Security Research Division of Network
7 * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"),
8 * as part of the DARPA CHATS research program.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD$");
34
35 #include "opt_mac.h"
36
37 #include <sys/param.h>
38 #include <sys/mac.h>
39 #include <sys/sysctl.h>
40 #include <sys/systm.h>
41
42 #include <vm/uma.h>
43
44 #include <security/mac/mac_internal.h>
45
46 uma_zone_t zone_label;
47
48 static int mac_labelzone_ctor(void *mem, int size, void *arg, int flags);
49 static void mac_labelzone_dtor(void *mem, int size, void *arg);
50
51 void
52 mac_labelzone_init(void)
53 {
54
55 zone_label = uma_zcreate("MAC labels", sizeof(struct label),
56 mac_labelzone_ctor, mac_labelzone_dtor, NULL, NULL,
57 UMA_ALIGN_PTR, 0);
58 }
59
60 static int
61 mac_labelzone_ctor(void *mem, int size, void *arg, int flags)
62 {
63 struct label *label;
64
65 KASSERT(size == sizeof(*label), ("mac_labelzone_ctor: wrong size\n"));
66 label = mem;
67 bzero(label, sizeof(*label));
68 label->l_flags = MAC_FLAG_INITIALIZED;
69 return (0);
70 }
71
72 static void
73 mac_labelzone_dtor(void *mem, int size, void *arg)
74 {
75 struct label *label;
76
77 KASSERT(size == sizeof(*label), ("mac_labelzone_dtor: wrong size\n"));
78 label = mem;
79 KASSERT(label->l_flags & MAC_FLAG_INITIALIZED,
80 ("mac_labelzone_dtor: label not initialized"));
81 #ifdef DIAGNOSTIC
82 bzero(label, sizeof(*label));
83 #else
84 label->l_flags &= ~MAC_FLAG_INITIALIZED;
85 #endif
86 }
87
88 struct label *
89 mac_labelzone_alloc(int flags)
90 {
91
92 return (uma_zalloc(zone_label, flags));
93 }
94
95 void
96 mac_labelzone_free(struct label *label)
97 {
98
99 uma_zfree(zone_label, label);
100 }
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