Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/fs/ext2/xattr_user.c | |
3 | * Handler for extended user attributes. | |
4 | * | |
5 | * Copyright (C) 2001 by Andreas Gruenbacher, <a.gruenbacher@computer.org> | |
6 | */ | |
7 | ||
8 | #include <linux/init.h> | |
9 | #include <linux/module.h> | |
10 | #include <linux/string.h> | |
11 | #include "ext2.h" | |
12 | #include "xattr.h" | |
13 | ||
1da177e4 | 14 | static size_t |
431547b3 CH |
15 | ext2_xattr_user_list(struct dentry *dentry, char *list, size_t list_size, |
16 | const char *name, size_t name_len, int type) | |
1da177e4 | 17 | { |
f905f06f | 18 | const size_t prefix_len = XATTR_USER_PREFIX_LEN; |
1da177e4 LT |
19 | const size_t total_len = prefix_len + name_len + 1; |
20 | ||
431547b3 | 21 | if (!test_opt(dentry->d_sb, XATTR_USER)) |
1da177e4 LT |
22 | return 0; |
23 | ||
24 | if (list && total_len <= list_size) { | |
25 | memcpy(list, XATTR_USER_PREFIX, prefix_len); | |
26 | memcpy(list+prefix_len, name, name_len); | |
27 | list[prefix_len + name_len] = '\0'; | |
28 | } | |
29 | return total_len; | |
30 | } | |
31 | ||
32 | static int | |
431547b3 CH |
33 | ext2_xattr_user_get(struct dentry *dentry, const char *name, |
34 | void *buffer, size_t size, int type) | |
1da177e4 | 35 | { |
1da177e4 LT |
36 | if (strcmp(name, "") == 0) |
37 | return -EINVAL; | |
431547b3 | 38 | if (!test_opt(dentry->d_sb, XATTR_USER)) |
1da177e4 | 39 | return -EOPNOTSUPP; |
431547b3 CH |
40 | return ext2_xattr_get(dentry->d_inode, EXT2_XATTR_INDEX_USER, |
41 | name, buffer, size); | |
1da177e4 LT |
42 | } |
43 | ||
44 | static int | |
431547b3 CH |
45 | ext2_xattr_user_set(struct dentry *dentry, const char *name, |
46 | const void *value, size_t size, int flags, int type) | |
1da177e4 | 47 | { |
1da177e4 LT |
48 | if (strcmp(name, "") == 0) |
49 | return -EINVAL; | |
431547b3 | 50 | if (!test_opt(dentry->d_sb, XATTR_USER)) |
1da177e4 | 51 | return -EOPNOTSUPP; |
1da177e4 | 52 | |
431547b3 CH |
53 | return ext2_xattr_set(dentry->d_inode, EXT2_XATTR_INDEX_USER, |
54 | name, value, size, flags); | |
1da177e4 LT |
55 | } |
56 | ||
749c72ef | 57 | const struct xattr_handler ext2_xattr_user_handler = { |
1da177e4 LT |
58 | .prefix = XATTR_USER_PREFIX, |
59 | .list = ext2_xattr_user_list, | |
60 | .get = ext2_xattr_user_get, | |
61 | .set = ext2_xattr_user_set, | |
62 | }; |