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1 | /* |
2 | * Copyright (c) 2007 Apple Inc. All rights reserved. | |
3 | * | |
4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ | |
5 | * | |
6 | * This file contains Original Code and/or Modifications of Original Code | |
7 | * as defined in and that are subject to the Apple Public Source License | |
8 | * Version 2.0 (the 'License'). You may not use this file except in | |
9 | * compliance with the License. The rights granted to you under the License | |
10 | * may not be used to create, or enable the creation or redistribution of, | |
11 | * unlawful or unlicensed copies of an Apple operating system, or to | |
12 | * circumvent, violate, or enable the circumvention or violation of, any | |
13 | * terms of an Apple operating system software license agreement. | |
14 | * | |
15 | * Please obtain a copy of the License at | |
16 | * http://www.opensource.apple.com/apsl/ and read it before using this file. | |
17 | * | |
18 | * The Original Code and all software distributed under the License are | |
19 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER | |
20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, | |
21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
22 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. | |
23 | * Please see the License for the specific language governing rights and | |
24 | * limitations under the License. | |
25 | * | |
26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ | |
27 | */ | |
28 | /* | |
29 | * | |
30 | */ | |
31 | ||
32 | #include <kern/kalloc.h> | |
33 | #include <kern/zalloc.h> | |
34 | ||
35 | #include <sys/param.h> | |
36 | #include <sys/queue.h> | |
37 | #include <sys/systm.h> | |
38 | #include <sys/mbuf.h> | |
39 | ||
40 | #include <vm/vm_map.h> | |
41 | ||
42 | #include "mac_alloc.h" | |
43 | ||
44 | /* | |
45 | * XXXMAC: We should probably make sure only registered policies can | |
46 | * call these, otherwise we're effectively changing Apple's plan wrt | |
47 | * exported allocators. | |
48 | */ | |
49 | ||
50 | /* | |
51 | * Kernel allocator | |
52 | */ | |
53 | void * | |
54 | mac_kalloc(vm_size_t size, int how) | |
55 | { | |
56 | ||
57 | if (how == M_WAITOK) | |
58 | return kalloc(size); | |
59 | else | |
60 | return kalloc_noblock(size); | |
61 | } | |
62 | ||
63 | /* | |
64 | * for temporary binary compatibility | |
65 | */ | |
66 | void * mac_kalloc_noblock (vm_size_t size); | |
67 | void * | |
68 | mac_kalloc_noblock(vm_size_t size) | |
69 | { | |
70 | return kalloc_noblock(size); | |
71 | } | |
72 | ||
73 | void | |
74 | mac_kfree(void * data, vm_size_t size) | |
75 | { | |
76 | ||
77 | return kfree(data, size); | |
78 | } | |
79 | ||
80 | /* | |
81 | * MBuf tag allocator. | |
82 | */ | |
83 | ||
84 | void * | |
85 | mac_mbuf_alloc(int len, int wait) | |
86 | { | |
87 | struct m_tag *t; | |
88 | ||
89 | t = m_tag_alloc(KERNEL_MODULE_TAG_ID, KERNEL_TAG_TYPE_MAC_POLICY_LABEL, | |
90 | len, wait); | |
91 | if (t == NULL) | |
92 | return (NULL); | |
93 | ||
94 | return ((void *)(t + 1)); | |
95 | } | |
96 | ||
97 | void | |
98 | mac_mbuf_free(void *data) | |
99 | { | |
100 | struct m_tag *t; | |
101 | ||
102 | t = (struct m_tag *)((char *)data - sizeof(struct m_tag)); | |
103 | m_tag_free(t); | |
104 | } | |
105 | ||
106 | /* | |
107 | * VM functions | |
108 | */ | |
109 | ||
110 | extern vm_map_t kalloc_map; | |
111 | ||
112 | int | |
113 | mac_wire(void *start, void *end) | |
114 | { | |
115 | ||
116 | return (vm_map_wire(kalloc_map, CAST_USER_ADDR_T(start), | |
117 | CAST_USER_ADDR_T(end), VM_PROT_READ|VM_PROT_WRITE, FALSE)); | |
118 | } | |
119 | ||
120 | int | |
121 | mac_unwire(void *start, void *end) | |
122 | { | |
123 | ||
124 | return (vm_map_unwire(kalloc_map, CAST_USER_ADDR_T(start), | |
125 | CAST_USER_ADDR_T(end), FALSE)); | |
126 | } | |
127 | ||
128 | /* | |
129 | * Zone allocator | |
130 | */ | |
131 | zone_t | |
132 | mac_zinit(vm_size_t size, vm_size_t maxmem, vm_size_t alloc, const char *name) | |
133 | { | |
134 | ||
135 | return zinit(size, maxmem, alloc, name); | |
136 | } | |
137 | ||
138 | void | |
139 | mac_zone_change(zone_t zone, unsigned int item, boolean_t value) | |
140 | { | |
141 | ||
142 | zone_change(zone, item, value); | |
143 | } | |
144 | ||
145 | void * | |
146 | mac_zalloc(zone_t zone, int how) | |
147 | { | |
148 | ||
149 | if (how == M_WAITOK) | |
150 | return zalloc(zone); | |
151 | else | |
152 | return zalloc_noblock(zone); | |
153 | } | |
154 | ||
155 | void | |
156 | mac_zfree(zone_t zone, void *elem) | |
157 | { | |
158 | ||
159 | zfree(zone, elem); | |
160 | } |