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1 | /* |
2 | * JFFS2 -- Journalling Flash File System, Version 2. |
3 | * |
4 | * Copyright © 2006 NEC Corporation |
5 | * |
6 | * Created by KaiGai Kohei <kaigai@ak.jp.nec.com> |
7 | * |
8 | * For licensing information, see the file 'LICENCE' in this directory. |
9 | * |
10 | */ |
11 | |
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 -------------- */ |
26 | int jffs2_init_security(struct inode *inode, struct inode *dir, |
27 | const struct qstr *qstr) |
28 | { |
29 | int rc; |
30 | size_t len; |
31 | void *value; |
32 | char *name; |
33 | |
34 | rc = security_inode_init_security(inode, dir, qstr, &name, &value, &len); |
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 | |
42 | kfree(name); |
43 | kfree(value); |
44 | return rc; |
45 | } |
46 | |
47 | /* ---- XATTR Handler for "security.*" ----------------- */ |
48 | static int jffs2_security_getxattr(struct dentry *dentry, const char *name, |
49 | void *buffer, size_t size, int type) |
50 | { |
51 | if (!strcmp(name, "")) |
52 | return -EINVAL; |
53 | |
54 | return do_jffs2_getxattr(dentry->d_inode, JFFS2_XPREFIX_SECURITY, |
55 | name, buffer, size); |
56 | } |
57 | |
58 | static int jffs2_security_setxattr(struct dentry *dentry, const char *name, |
59 | const void *buffer, size_t size, int flags, int type) |
60 | { |
61 | if (!strcmp(name, "")) |
62 | return -EINVAL; |
63 | |
64 | return do_jffs2_setxattr(dentry->d_inode, JFFS2_XPREFIX_SECURITY, |
65 | name, buffer, size, flags); |
66 | } |
67 | |
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) |
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 | |
81 | const struct xattr_handler jffs2_security_xattr_handler = { |
82 | .prefix = XATTR_SECURITY_PREFIX, |
83 | .list = jffs2_security_listxattr, |
84 | .set = jffs2_security_setxattr, |
85 | .get = jffs2_security_getxattr |
86 | }; |
87 |
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
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v3.9