Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/fs/ext2/xattr_trusted.c | |
3 | * Handler for trusted extended attributes. | |
4 | * | |
5 | * Copyright (C) 2003 by Andreas Gruenbacher, <a.gruenbacher@computer.org> | |
6 | */ | |
7 | ||
f7699f2b | 8 | #include "ext2.h" |
1da177e4 LT |
9 | #include "xattr.h" |
10 | ||
1da177e4 | 11 | static size_t |
d9a82a04 AG |
12 | ext2_xattr_trusted_list(const struct xattr_handler *handler, |
13 | struct dentry *dentry, char *list, size_t list_size, | |
14 | const char *name, size_t name_len) | |
1da177e4 | 15 | { |
f905f06f | 16 | const int prefix_len = XATTR_TRUSTED_PREFIX_LEN; |
1da177e4 LT |
17 | const size_t total_len = prefix_len + name_len + 1; |
18 | ||
19 | if (!capable(CAP_SYS_ADMIN)) | |
20 | return 0; | |
21 | ||
22 | if (list && total_len <= list_size) { | |
23 | memcpy(list, XATTR_TRUSTED_PREFIX, prefix_len); | |
24 | memcpy(list+prefix_len, name, name_len); | |
25 | list[prefix_len + name_len] = '\0'; | |
26 | } | |
27 | return total_len; | |
28 | } | |
29 | ||
30 | static int | |
d9a82a04 AG |
31 | ext2_xattr_trusted_get(const struct xattr_handler *handler, |
32 | struct dentry *dentry, const char *name, | |
33 | void *buffer, size_t size) | |
1da177e4 LT |
34 | { |
35 | if (strcmp(name, "") == 0) | |
36 | return -EINVAL; | |
2b0143b5 | 37 | return ext2_xattr_get(d_inode(dentry), EXT2_XATTR_INDEX_TRUSTED, name, |
1da177e4 LT |
38 | buffer, size); |
39 | } | |
40 | ||
41 | static int | |
d9a82a04 AG |
42 | ext2_xattr_trusted_set(const struct xattr_handler *handler, |
43 | struct dentry *dentry, const char *name, | |
44 | const void *value, size_t size, int flags) | |
1da177e4 LT |
45 | { |
46 | if (strcmp(name, "") == 0) | |
47 | return -EINVAL; | |
2b0143b5 | 48 | return ext2_xattr_set(d_inode(dentry), EXT2_XATTR_INDEX_TRUSTED, name, |
1da177e4 LT |
49 | value, size, flags); |
50 | } | |
51 | ||
749c72ef | 52 | const struct xattr_handler ext2_xattr_trusted_handler = { |
1da177e4 LT |
53 | .prefix = XATTR_TRUSTED_PREFIX, |
54 | .list = ext2_xattr_trusted_list, | |
55 | .get = ext2_xattr_trusted_get, | |
56 | .set = ext2_xattr_trusted_set, | |
57 | }; |