Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/fs/ext3/xattr_trusted.c | |
3 | * Handler for trusted extended attributes. | |
4 | * | |
5 | * Copyright (C) 2003 by Andreas Gruenbacher, <a.gruenbacher@computer.org> | |
6 | */ | |
7 | ||
4613ad18 | 8 | #include "ext3.h" |
1da177e4 LT |
9 | #include "xattr.h" |
10 | ||
1da177e4 | 11 | static size_t |
431547b3 CH |
12 | ext3_xattr_trusted_list(struct dentry *dentry, char *list, size_t list_size, |
13 | const char *name, size_t name_len, int type) | |
1da177e4 | 14 | { |
ef1afd39 | 15 | const size_t prefix_len = XATTR_TRUSTED_PREFIX_LEN; |
1da177e4 LT |
16 | const size_t total_len = prefix_len + name_len + 1; |
17 | ||
18 | if (!capable(CAP_SYS_ADMIN)) | |
19 | return 0; | |
20 | ||
21 | if (list && total_len <= list_size) { | |
22 | memcpy(list, XATTR_TRUSTED_PREFIX, prefix_len); | |
23 | memcpy(list+prefix_len, name, name_len); | |
24 | list[prefix_len + name_len] = '\0'; | |
25 | } | |
26 | return total_len; | |
27 | } | |
28 | ||
29 | static int | |
431547b3 CH |
30 | ext3_xattr_trusted_get(struct dentry *dentry, const char *name, |
31 | void *buffer, size_t size, int type) | |
1da177e4 LT |
32 | { |
33 | if (strcmp(name, "") == 0) | |
34 | return -EINVAL; | |
431547b3 CH |
35 | return ext3_xattr_get(dentry->d_inode, EXT3_XATTR_INDEX_TRUSTED, |
36 | name, buffer, size); | |
1da177e4 LT |
37 | } |
38 | ||
39 | static int | |
431547b3 CH |
40 | ext3_xattr_trusted_set(struct dentry *dentry, const char *name, |
41 | const void *value, size_t size, int flags, int type) | |
1da177e4 LT |
42 | { |
43 | if (strcmp(name, "") == 0) | |
44 | return -EINVAL; | |
431547b3 | 45 | return ext3_xattr_set(dentry->d_inode, EXT3_XATTR_INDEX_TRUSTED, name, |
1da177e4 LT |
46 | value, size, flags); |
47 | } | |
48 | ||
d1f21049 | 49 | const struct xattr_handler ext3_xattr_trusted_handler = { |
1da177e4 LT |
50 | .prefix = XATTR_TRUSTED_PREFIX, |
51 | .list = ext3_xattr_trusted_list, | |
52 | .get = ext3_xattr_trusted_get, | |
53 | .set = ext3_xattr_trusted_set, | |
54 | }; |