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2d21ac55 A |
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 | ||
40 | static zone_t zone_label; | |
41 | ||
42 | void | |
43 | mac_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 | } | |
52 | ||
53 | struct label * | |
54 | mac_labelzone_alloc(int flags) | |
55 | { | |
56 | struct label *l; | |
57 | ||
58 | if (flags & MAC_NOWAIT) | |
59 | l = (struct label *) zalloc_noblock(zone_label); | |
60 | else | |
61 | l = (struct label *) zalloc(zone_label); | |
62 | if (l == NULL) | |
63 | return (NULL); | |
64 | ||
65 | bzero(l, sizeof(struct label)); | |
66 | l->l_flags = MAC_FLAG_INITIALIZED; | |
67 | return (l); | |
68 | } | |
69 | ||
70 | void | |
71 | mac_labelzone_free(struct label *l) | |
72 | { | |
73 | ||
74 | if (l == NULL) | |
75 | panic("Free of NULL MAC label\n"); | |
76 | ||
77 | if ((l->l_flags & MAC_FLAG_INITIALIZED) == 0) | |
78 | panic("Free of uninitialized label\n"); | |
79 | bzero(l, sizeof(struct label)); | |
80 | zfree(zone_label, l); | |
81 | } | |
b0d623f7 A |
82 | |
83 | /* | |
84 | * Functions used by policy modules to get and set label values. | |
85 | */ | |
86 | intptr_t | |
87 | mac_label_get(struct label *l, int slot) | |
88 | { | |
89 | KASSERT(l != NULL, ("mac_label_get: NULL label")); | |
90 | ||
91 | return ((intptr_t) (l->l_perpolicy[slot].l_ptr)); | |
92 | } | |
93 | ||
94 | void | |
95 | mac_label_set(struct label *l, int slot, intptr_t v) | |
96 | { | |
97 | KASSERT(l != NULL, ("mac_label_set: NULL label")); | |
98 | ||
99 | l->l_perpolicy[slot].l_ptr = (void *) v; | |
100 | } | |
101 |