2 * linux/fs/ext3/xattr_trusted.c
3 * Handler for trusted extended attributes.
5 * Copyright (C) 2003 by Andreas Gruenbacher, <a.gruenbacher@computer.org>
8 #include <linux/module.h>
9 #include <linux/string.h>
10 #include <linux/capability.h>
12 #include <linux/ext3_jbd.h>
13 #include <linux/ext3_fs.h>
17 ext3_xattr_trusted_list(struct inode *inode, char *list, size_t list_size,
18 const char *name, size_t name_len)
20 const size_t prefix_len = XATTR_TRUSTED_PREFIX_LEN;
21 const size_t total_len = prefix_len + name_len + 1;
23 if (!capable(CAP_SYS_ADMIN))
26 if (list && total_len <= list_size) {
27 memcpy(list, XATTR_TRUSTED_PREFIX, prefix_len);
28 memcpy(list+prefix_len, name, name_len);
29 list[prefix_len + name_len] = '\0';
35 ext3_xattr_trusted_get(struct inode *inode, const char *name,
36 void *buffer, size_t size)
38 if (strcmp(name, "") == 0)
40 return ext3_xattr_get(inode, EXT3_XATTR_INDEX_TRUSTED, name,
45 ext3_xattr_trusted_set(struct inode *inode, const char *name,
46 const void *value, size_t size, int flags)
48 if (strcmp(name, "") == 0)
50 return ext3_xattr_set(inode, EXT3_XATTR_INDEX_TRUSTED, name,
54 struct xattr_handler ext3_xattr_trusted_handler = {
55 .prefix = XATTR_TRUSTED_PREFIX,
56 .list = ext3_xattr_trusted_list,
57 .get = ext3_xattr_trusted_get,
58 .set = ext3_xattr_trusted_set,