7c21ffb26d25de418e7409b62d4f075d02121466
[releases.git] / xattr_trusted.c
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
17 ext4_xattr_trusted_list(struct dentry *dentry)
18 {
19         return capable(CAP_SYS_ADMIN);
20 }
21
22 static int
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
32 ext4_xattr_trusted_set(const struct xattr_handler *handler,
33                        struct user_namespace *mnt_userns,
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 };