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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/fs.h> | |
14 | #include <linux/jffs2.h> | |
15 | #include <linux/xattr.h> | |
16 | #include <linux/mtd/mtd.h> | |
17 | #include "nodelist.h" | |
18 | ||
d9a82a04 AG |
19 | static int jffs2_trusted_getxattr(const struct xattr_handler *handler, |
20 | struct dentry *dentry, const char *name, | |
21 | void *buffer, size_t size) | |
aa98d7cf | 22 | { |
2b0143b5 | 23 | return do_jffs2_getxattr(d_inode(dentry), JFFS2_XPREFIX_TRUSTED, |
431547b3 | 24 | name, buffer, size); |
aa98d7cf KK |
25 | } |
26 | ||
d9a82a04 AG |
27 | static int jffs2_trusted_setxattr(const struct xattr_handler *handler, |
28 | struct dentry *dentry, const char *name, | |
29 | const void *buffer, size_t size, int flags) | |
aa98d7cf | 30 | { |
2b0143b5 | 31 | return do_jffs2_setxattr(d_inode(dentry), JFFS2_XPREFIX_TRUSTED, |
431547b3 | 32 | name, buffer, size, flags); |
aa98d7cf KK |
33 | } |
34 | ||
d9a82a04 AG |
35 | static size_t jffs2_trusted_listxattr(const struct xattr_handler *handler, |
36 | struct dentry *dentry, char *list, | |
37 | size_t list_size, const char *name, | |
38 | size_t name_len) | |
aa98d7cf KK |
39 | { |
40 | size_t retlen = XATTR_TRUSTED_PREFIX_LEN + name_len + 1; | |
41 | ||
bf781714 AG |
42 | if (!capable(CAP_SYS_ADMIN)) |
43 | return 0; | |
44 | ||
aa98d7cf KK |
45 | if (list && retlen<=list_size) { |
46 | strcpy(list, XATTR_TRUSTED_PREFIX); | |
47 | strcpy(list + XATTR_TRUSTED_PREFIX_LEN, name); | |
48 | } | |
49 | ||
50 | return retlen; | |
51 | } | |
52 | ||
365f0cb9 | 53 | const struct xattr_handler jffs2_trusted_xattr_handler = { |
aa98d7cf KK |
54 | .prefix = XATTR_TRUSTED_PREFIX, |
55 | .list = jffs2_trusted_listxattr, | |
56 | .set = jffs2_trusted_setxattr, | |
57 | .get = jffs2_trusted_getxattr | |
58 | }; |