2 * linux/fs/ext3/xattr_user.c
3 * Handler for extended user attributes.
5 * Copyright (C) 2001 by Andreas Gruenbacher, <a.gruenbacher@computer.org>
8 #include <linux/module.h>
9 #include <linux/string.h>
11 #include <linux/ext3_jbd.h>
12 #include <linux/ext3_fs.h>
16 ext3_xattr_user_list(struct inode *inode, char *list, size_t list_size,
17 const char *name, size_t name_len)
19 const size_t prefix_len = XATTR_USER_PREFIX_LEN;
20 const size_t total_len = prefix_len + name_len + 1;
22 if (!test_opt(inode->i_sb, XATTR_USER))
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';
34 ext3_xattr_user_get(struct inode *inode, const char *name,
35 void *buffer, size_t size)
37 if (strcmp(name, "") == 0)
39 if (!test_opt(inode->i_sb, XATTR_USER))
41 return ext3_xattr_get(inode, EXT3_XATTR_INDEX_USER, name, buffer, size);
45 ext3_xattr_user_set(struct inode *inode, const char *name,
46 const void *value, size_t size, int flags)
48 if (strcmp(name, "") == 0)
50 if (!test_opt(inode->i_sb, XATTR_USER))
52 return ext3_xattr_set(inode, EXT3_XATTR_INDEX_USER, name,
56 struct xattr_handler ext3_xattr_user_handler = {
57 .prefix = XATTR_USER_PREFIX,
58 .list = ext3_xattr_user_list,
59 .get = ext3_xattr_user_get,
60 .set = ext3_xattr_user_set,