1// SPDX-License-Identifier: GPL-2.0
2#include "reiserfs.h"
3#include <linux/capability.h>
4#include <linux/errno.h>
5#include <linux/fs.h>
6#include <linux/pagemap.h>
7#include <linux/xattr.h>
8#include "xattr.h"
9#include <linux/uaccess.h>
10
11static int
12trusted_get(const struct xattr_handler *handler, struct dentry *unused,
13 struct inode *inode, const char *name, void *buffer, size_t size)
14{
15 if (!capable(CAP_SYS_ADMIN) || IS_PRIVATE(inode))
16 return -EPERM;
17
18 return reiserfs_xattr_get(inode, xattr_full_name(handler, name),
19 buffer, size);
20}
21
22static int
23trusted_set(const struct xattr_handler *handler,
24 struct mnt_idmap *idmap, struct dentry *unused,
25 struct inode *inode, const char *name, const void *buffer,
26 size_t size, int flags)
27{
28 if (!capable(CAP_SYS_ADMIN) || IS_PRIVATE(inode))
29 return -EPERM;
30
31 return reiserfs_xattr_set(inode,
32 xattr_full_name(handler, name),
33 buffer, size, flags);
34}
35
36static bool trusted_list(struct dentry *dentry)
37{
38 return capable(CAP_SYS_ADMIN) && !IS_PRIVATE(d_inode(dentry));
39}
40
41const struct xattr_handler reiserfs_xattr_trusted_handler = {
42 .prefix = XATTR_TRUSTED_PREFIX,
43 .get = trusted_get,
44 .set = trusted_set,
45 .list = trusted_list,
46};
47

source code of linux/fs/reiserfs/xattr_trusted.c