Commit | Line | Data |
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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> | |
1da177e4 LT |
9 | #include <linux/string.h> |
10 | #include "ext2.h" | |
11 | #include "xattr.h" | |
12 | ||
1da177e4 | 13 | static size_t |
d9a82a04 AG |
14 | ext2_xattr_user_list(const struct xattr_handler *handler, |
15 | struct dentry *dentry, char *list, size_t list_size, | |
16 | const char *name, size_t name_len) | |
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 | |
d9a82a04 AG |
33 | ext2_xattr_user_get(const struct xattr_handler *handler, |
34 | struct dentry *dentry, const char *name, | |
35 | void *buffer, size_t size) | |
1da177e4 | 36 | { |
431547b3 | 37 | if (!test_opt(dentry->d_sb, XATTR_USER)) |
1da177e4 | 38 | return -EOPNOTSUPP; |
2b0143b5 | 39 | return ext2_xattr_get(d_inode(dentry), EXT2_XATTR_INDEX_USER, |
431547b3 | 40 | name, buffer, size); |
1da177e4 LT |
41 | } |
42 | ||
43 | static int | |
d9a82a04 AG |
44 | ext2_xattr_user_set(const struct xattr_handler *handler, |
45 | struct dentry *dentry, const char *name, | |
46 | const void *value, size_t size, int flags) | |
1da177e4 | 47 | { |
431547b3 | 48 | if (!test_opt(dentry->d_sb, XATTR_USER)) |
1da177e4 | 49 | return -EOPNOTSUPP; |
1da177e4 | 50 | |
2b0143b5 | 51 | return ext2_xattr_set(d_inode(dentry), EXT2_XATTR_INDEX_USER, |
431547b3 | 52 | name, value, size, flags); |
1da177e4 LT |
53 | } |
54 | ||
749c72ef | 55 | const struct xattr_handler ext2_xattr_user_handler = { |
1da177e4 LT |
56 | .prefix = XATTR_USER_PREFIX, |
57 | .list = ext2_xattr_user_list, | |
58 | .get = ext2_xattr_user_get, | |
59 | .set = ext2_xattr_user_set, | |
60 | }; |