Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/fs/ext3/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/module.h> | |
9 | #include <linux/string.h> | |
10 | #include <linux/fs.h> | |
1da177e4 LT |
11 | #include <linux/ext3_jbd.h> |
12 | #include <linux/ext3_fs.h> | |
13 | #include "xattr.h" | |
14 | ||
1da177e4 | 15 | static size_t |
431547b3 CH |
16 | ext3_xattr_user_list(struct dentry *dentry, char *list, size_t list_size, |
17 | const char *name, size_t name_len, int type) | |
1da177e4 | 18 | { |
ef1afd39 | 19 | const size_t prefix_len = XATTR_USER_PREFIX_LEN; |
1da177e4 LT |
20 | const size_t total_len = prefix_len + name_len + 1; |
21 | ||
431547b3 | 22 | if (!test_opt(dentry->d_sb, XATTR_USER)) |
1da177e4 LT |
23 | return 0; |
24 | ||
25 | if (list && total_len <= list_size) { | |
26 | memcpy(list, XATTR_USER_PREFIX, prefix_len); | |
27 | memcpy(list+prefix_len, name, name_len); | |
28 | list[prefix_len + name_len] = '\0'; | |
29 | } | |
30 | return total_len; | |
31 | } | |
32 | ||
33 | static int | |
431547b3 CH |
34 | ext3_xattr_user_get(struct dentry *dentry, const char *name, void *buffer, |
35 | size_t size, int type) | |
1da177e4 | 36 | { |
1da177e4 LT |
37 | if (strcmp(name, "") == 0) |
38 | return -EINVAL; | |
431547b3 | 39 | if (!test_opt(dentry->d_sb, XATTR_USER)) |
1da177e4 | 40 | return -EOPNOTSUPP; |
431547b3 CH |
41 | return ext3_xattr_get(dentry->d_inode, EXT3_XATTR_INDEX_USER, |
42 | name, buffer, size); | |
1da177e4 LT |
43 | } |
44 | ||
45 | static int | |
431547b3 CH |
46 | ext3_xattr_user_set(struct dentry *dentry, const char *name, |
47 | const void *value, size_t size, int flags, int type) | |
1da177e4 | 48 | { |
1da177e4 LT |
49 | if (strcmp(name, "") == 0) |
50 | return -EINVAL; | |
431547b3 | 51 | if (!test_opt(dentry->d_sb, XATTR_USER)) |
1da177e4 | 52 | return -EOPNOTSUPP; |
431547b3 CH |
53 | return ext3_xattr_set(dentry->d_inode, EXT3_XATTR_INDEX_USER, |
54 | name, value, size, flags); | |
1da177e4 LT |
55 | } |
56 | ||
d1f21049 | 57 | const struct xattr_handler ext3_xattr_user_handler = { |
1da177e4 LT |
58 | .prefix = XATTR_USER_PREFIX, |
59 | .list = ext3_xattr_user_list, | |
60 | .get = ext3_xattr_user_get, | |
61 | .set = ext3_xattr_user_set, | |
62 | }; |