Merge tag 'drm-msm-fixes-2021-04-02' of https://gitlab.freedesktop.org/drm/msm into...
[platform/kernel/linux-starfive.git] / fs / ext4 / xattr_user.c
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * linux/fs/ext4/xattr_user.c
4  * Handler for extended user attributes.
5  *
6  * Copyright (C) 2001 by Andreas Gruenbacher, <a.gruenbacher@computer.org>
7  */
8
9 #include <linux/string.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_user_list(struct dentry *dentry)
17 {
18         return test_opt(dentry->d_sb, XATTR_USER);
19 }
20
21 static int
22 ext4_xattr_user_get(const struct xattr_handler *handler,
23                     struct dentry *unused, struct inode *inode,
24                     const char *name, void *buffer, size_t size)
25 {
26         if (!test_opt(inode->i_sb, XATTR_USER))
27                 return -EOPNOTSUPP;
28         return ext4_xattr_get(inode, EXT4_XATTR_INDEX_USER,
29                               name, buffer, size);
30 }
31
32 static int
33 ext4_xattr_user_set(const struct xattr_handler *handler,
34                     struct user_namespace *mnt_userns,
35                     struct dentry *unused, struct inode *inode,
36                     const char *name, const void *value,
37                     size_t size, int flags)
38 {
39         if (!test_opt(inode->i_sb, XATTR_USER))
40                 return -EOPNOTSUPP;
41         return ext4_xattr_set(inode, EXT4_XATTR_INDEX_USER,
42                               name, value, size, flags);
43 }
44
45 const struct xattr_handler ext4_xattr_user_handler = {
46         .prefix = XATTR_USER_PREFIX,
47         .list   = ext4_xattr_user_list,
48         .get    = ext4_xattr_user_get,
49         .set    = ext4_xattr_user_set,
50 };