Commit | Line | Data |
---|---|---|
cdff2642 JJ |
1 | /* |
2 | * AppArmor security module | |
3 | * | |
4 | * This file contains basic common functions used in AppArmor | |
5 | * | |
6 | * Copyright (C) 1998-2008 Novell/SUSE | |
7 | * Copyright 2009-2010 Canonical Ltd. | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU General Public License as | |
11 | * published by the Free Software Foundation, version 2 of the | |
12 | * License. | |
13 | */ | |
14 | ||
b7f080cf | 15 | #include <linux/mm.h> |
cdff2642 JJ |
16 | #include <linux/slab.h> |
17 | #include <linux/string.h> | |
18 | #include <linux/vmalloc.h> | |
19 | ||
20 | #include "include/audit.h" | |
32c3df63 | 21 | #include "include/apparmor.h" |
cdff2642 JJ |
22 | |
23 | ||
24 | /** | |
25 | * aa_split_fqname - split a fqname into a profile and namespace name | |
26 | * @fqname: a full qualified name in namespace profile format (NOT NULL) | |
27 | * @ns_name: pointer to portion of the string containing the ns name (NOT NULL) | |
28 | * | |
29 | * Returns: profile name or NULL if one is not specified | |
30 | * | |
31 | * Split a namespace name from a profile name (see policy.c for naming | |
32 | * description). If a portion of the name is missing it returns NULL for | |
33 | * that portion. | |
34 | * | |
35 | * NOTE: may modify the @fqname string. The pointers returned point | |
36 | * into the @fqname string. | |
37 | */ | |
38 | char *aa_split_fqname(char *fqname, char **ns_name) | |
39 | { | |
40 | char *name = strim(fqname); | |
41 | ||
42 | *ns_name = NULL; | |
43 | if (name[0] == ':') { | |
44 | char *split = strchr(&name[1], ':'); | |
04ccd53f | 45 | *ns_name = skip_spaces(&name[1]); |
cdff2642 JJ |
46 | if (split) { |
47 | /* overwrite ':' with \0 */ | |
2654bfbc JJ |
48 | *split++ = 0; |
49 | if (strncmp(split, "//", 2) == 0) | |
50 | split += 2; | |
51 | name = skip_spaces(split); | |
cdff2642 JJ |
52 | } else |
53 | /* a ns name without a following profile is allowed */ | |
54 | name = NULL; | |
cdff2642 JJ |
55 | } |
56 | if (name && *name == 0) | |
57 | name = NULL; | |
58 | ||
59 | return name; | |
60 | } | |
61 | ||
62 | /** | |
63 | * aa_info_message - log a none profile related status message | |
64 | * @str: message to log | |
65 | */ | |
66 | void aa_info_message(const char *str) | |
67 | { | |
68 | if (audit_enabled) { | |
69 | struct common_audit_data sa; | |
3b3b0e4f | 70 | struct apparmor_audit_data aad = {0,}; |
50c205f5 | 71 | sa.type = LSM_AUDIT_DATA_NONE; |
3b3b0e4f EP |
72 | sa.aad = &aad; |
73 | aad.info = str; | |
cdff2642 JJ |
74 | aa_audit_msg(AUDIT_APPARMOR_STATUS, &sa, NULL); |
75 | } | |
76 | printk(KERN_INFO "AppArmor: %s\n", str); | |
77 | } | |
78 | ||
79 | /** | |
0ca554b9 JJ |
80 | * __aa_kvmalloc - do allocation preferring kmalloc but falling back to vmalloc |
81 | * @size: how many bytes of memory are required | |
82 | * @flags: the type of memory to allocate (see kmalloc). | |
cdff2642 JJ |
83 | * |
84 | * Return: allocated buffer or NULL if failed | |
85 | * | |
86 | * It is possible that policy being loaded from the user is larger than | |
87 | * what can be allocated by kmalloc, in those cases fall back to vmalloc. | |
88 | */ | |
0ca554b9 | 89 | void *__aa_kvmalloc(size_t size, gfp_t flags) |
cdff2642 JJ |
90 | { |
91 | void *buffer = NULL; | |
92 | ||
93 | if (size == 0) | |
94 | return NULL; | |
95 | ||
96 | /* do not attempt kmalloc if we need more than 16 pages at once */ | |
97 | if (size <= (16*PAGE_SIZE)) | |
0ca554b9 | 98 | buffer = kmalloc(size, flags | GFP_NOIO | __GFP_NOWARN); |
cdff2642 | 99 | if (!buffer) { |
0ca554b9 JJ |
100 | if (flags & __GFP_ZERO) |
101 | buffer = vzalloc(size); | |
102 | else | |
103 | buffer = vmalloc(size); | |
cdff2642 JJ |
104 | } |
105 | return buffer; | |
106 | } |