GNU Linux-libre 4.9.308-gnu1
[releases.git] / fs / ext4 / xattr_trusted.c
1 /*
2  * linux/fs/ext4/xattr_trusted.c
3  * Handler for trusted extended attributes.
4  *
5  * Copyright (C) 2003 by Andreas Gruenbacher, <a.gruenbacher@computer.org>
6  */
7
8 #include <linux/string.h>
9 #include <linux/capability.h>
10 #include <linux/fs.h>
11 #include "ext4_jbd2.h"
12 #include "ext4.h"
13 #include "xattr.h"
14
15 static bool
16 ext4_xattr_trusted_list(struct dentry *dentry)
17 {
18         return capable(CAP_SYS_ADMIN);
19 }
20
21 static int
22 ext4_xattr_trusted_get(const struct xattr_handler *handler,
23                        struct dentry *unused, struct inode *inode,
24                        const char *name, void *buffer, size_t size)
25 {
26         return ext4_xattr_get(inode, EXT4_XATTR_INDEX_TRUSTED,
27                               name, buffer, size);
28 }
29
30 static int
31 ext4_xattr_trusted_set(const struct xattr_handler *handler,
32                        struct dentry *unused, struct inode *inode,
33                        const char *name, const void *value,
34                        size_t size, int flags)
35 {
36         return ext4_xattr_set(inode, EXT4_XATTR_INDEX_TRUSTED,
37                               name, value, size, flags);
38 }
39
40 const struct xattr_handler ext4_xattr_trusted_handler = {
41         .prefix = XATTR_TRUSTED_PREFIX,
42         .list   = ext4_xattr_trusted_list,
43         .get    = ext4_xattr_trusted_get,
44         .set    = ext4_xattr_trusted_set,
45 };