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 | zone_change(zone_label, Z_CALLERACCT, FALSE); |
52 | } |
53 | |
54 | struct label * |
55 | mac_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 | |
71 | void |
72 | mac_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 | */ |
87 | intptr_t |
88 | mac_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 | |
95 | void |
96 | mac_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 | |