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Commit | Line | Data |
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652ecc20 KK |
1 | /* |
2 | * JFFS2 -- Journalling Flash File System, Version 2. | |
aa98d7cf | 3 | * |
c00c310e | 4 | * Copyright © 2006 NEC Corporation |
aa98d7cf | 5 | * |
652ecc20 KK |
6 | * Created by KaiGai Kohei <kaigai@ak.jp.nec.com> |
7 | * | |
8 | * For licensing information, see the file 'LICENCE' in this directory. | |
9 | * | |
10 | */ | |
c00c310e | 11 | |
aa98d7cf KK |
12 | #include <linux/kernel.h> |
13 | #include <linux/slab.h> | |
14 | #include <linux/fs.h> | |
15 | #include <linux/time.h> | |
16 | #include <linux/pagemap.h> | |
17 | #include <linux/highmem.h> | |
18 | #include <linux/crc32.h> | |
19 | #include <linux/jffs2.h> | |
20 | #include <linux/xattr.h> | |
21 | #include <linux/mtd/mtd.h> | |
22 | #include <linux/security.h> | |
23 | #include "nodelist.h" | |
24 | ||
25 | /* ---- Initial Security Label Attachment -------------- */ | |
2a7dba39 EP |
26 | int jffs2_init_security(struct inode *inode, struct inode *dir, |
27 | const struct qstr *qstr) | |
aa98d7cf KK |
28 | { |
29 | int rc; | |
30 | size_t len; | |
31 | void *value; | |
32 | char *name; | |
33 | ||
2a7dba39 | 34 | rc = security_inode_init_security(inode, dir, qstr, &name, &value, &len); |
aa98d7cf KK |
35 | if (rc) { |
36 | if (rc == -EOPNOTSUPP) | |
37 | return 0; | |
38 | return rc; | |
39 | } | |
40 | rc = do_jffs2_setxattr(inode, JFFS2_XPREFIX_SECURITY, name, value, len, 0); | |
41 | ||
ef53cb02 DW |
42 | kfree(name); |
43 | kfree(value); | |
44 | return rc; | |
aa98d7cf KK |
45 | } |
46 | ||
47 | /* ---- XATTR Handler for "security.*" ----------------- */ | |
431547b3 CH |
48 | static int jffs2_security_getxattr(struct dentry *dentry, const char *name, |
49 | void *buffer, size_t size, int type) | |
aa98d7cf KK |
50 | { |
51 | if (!strcmp(name, "")) | |
52 | return -EINVAL; | |
53 | ||
431547b3 CH |
54 | return do_jffs2_getxattr(dentry->d_inode, JFFS2_XPREFIX_SECURITY, |
55 | name, buffer, size); | |
aa98d7cf KK |
56 | } |
57 | ||
431547b3 CH |
58 | static int jffs2_security_setxattr(struct dentry *dentry, const char *name, |
59 | const void *buffer, size_t size, int flags, int type) | |
aa98d7cf KK |
60 | { |
61 | if (!strcmp(name, "")) | |
62 | return -EINVAL; | |
63 | ||
431547b3 CH |
64 | return do_jffs2_setxattr(dentry->d_inode, JFFS2_XPREFIX_SECURITY, |
65 | name, buffer, size, flags); | |
aa98d7cf KK |
66 | } |
67 | ||
431547b3 CH |
68 | static size_t jffs2_security_listxattr(struct dentry *dentry, char *list, |
69 | size_t list_size, const char *name, size_t name_len, int type) | |
aa98d7cf KK |
70 | { |
71 | size_t retlen = XATTR_SECURITY_PREFIX_LEN + name_len + 1; | |
72 | ||
73 | if (list && retlen <= list_size) { | |
74 | strcpy(list, XATTR_SECURITY_PREFIX); | |
75 | strcpy(list + XATTR_SECURITY_PREFIX_LEN, name); | |
76 | } | |
77 | ||
78 | return retlen; | |
79 | } | |
80 | ||
365f0cb9 | 81 | const struct xattr_handler jffs2_security_xattr_handler = { |
aa98d7cf KK |
82 | .prefix = XATTR_SECURITY_PREFIX, |
83 | .list = jffs2_security_listxattr, | |
84 | .set = jffs2_security_setxattr, | |
85 | .get = jffs2_security_getxattr | |
86 | }; |