1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * linux/fs/ext4/xattr_trusted.c
4 * Handler for trusted extended attributes.
5 *
6 * Copyright (C) 2003 by Andreas Gruenbacher, <a.gruenbacher@computer.org>
7 */
8
9 #include <linux/string.h>
10 #include <linux/capability.h>
11 #include <linux/fs.h>
12 #include "ext4_jbd2.h"
13 #include "ext4.h"
14 #include "xattr.h"
15
16 static bool
ext4_xattr_trusted_list(struct dentry * dentry)17 ext4_xattr_trusted_list(struct dentry *dentry)
18 {
19 return capable(CAP_SYS_ADMIN);
20 }
21
22 static int
ext4_xattr_trusted_get(const struct xattr_handler * handler,struct dentry * unused,struct inode * inode,const char * name,void * buffer,size_t size)23 ext4_xattr_trusted_get(const struct xattr_handler *handler,
24 struct dentry *unused, struct inode *inode,
25 const char *name, void *buffer, size_t size)
26 {
27 return ext4_xattr_get(inode, EXT4_XATTR_INDEX_TRUSTED,
28 name, buffer, size);
29 }
30
31 static int
ext4_xattr_trusted_set(const struct xattr_handler * handler,struct mnt_idmap * idmap,struct dentry * unused,struct inode * inode,const char * name,const void * value,size_t size,int flags)32 ext4_xattr_trusted_set(const struct xattr_handler *handler,
33 struct mnt_idmap *idmap,
34 struct dentry *unused, struct inode *inode,
35 const char *name, const void *value,
36 size_t size, int flags)
37 {
38 return ext4_xattr_set(inode, EXT4_XATTR_INDEX_TRUSTED,
39 name, value, size, flags);
40 }
41
42 const struct xattr_handler ext4_xattr_trusted_handler = {
43 .prefix = XATTR_TRUSTED_PREFIX,
44 .list = ext4_xattr_trusted_list,
45 .get = ext4_xattr_trusted_get,
46 .set = ext4_xattr_trusted_set,
47 };
48