2 * linux/fs/ext4/xattr_trusted.c
3 * Handler for trusted extended attributes.
5 * Copyright (C) 2003 by Andreas Gruenbacher, <a.gruenbacher@computer.org>
8 #include <linux/string.h>
9 #include <linux/capability.h>
11 #include "ext4_jbd2.h"
16 ext4_xattr_trusted_list(const struct xattr_handler *handler,
17 struct dentry *dentry, 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 ext4_xattr_trusted_get(const struct xattr_handler *handler,
36 struct dentry *dentry, const char *name, void *buffer,
39 if (strcmp(name, "") == 0)
41 return ext4_xattr_get(d_inode(dentry), EXT4_XATTR_INDEX_TRUSTED,
46 ext4_xattr_trusted_set(const struct xattr_handler *handler,
47 struct dentry *dentry, const char *name,
48 const void *value, size_t size, int flags)
50 if (strcmp(name, "") == 0)
52 return ext4_xattr_set(d_inode(dentry), EXT4_XATTR_INDEX_TRUSTED,
53 name, value, size, flags);
56 const struct xattr_handler ext4_xattr_trusted_handler = {
57 .prefix = XATTR_TRUSTED_PREFIX,
58 .list = ext4_xattr_trusted_list,
59 .get = ext4_xattr_trusted_get,
60 .set = ext4_xattr_trusted_set,