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
ext4_xattr_user_list(struct dentry * dentry)16 ext4_xattr_user_list(struct dentry *dentry)
17 {
18 return test_opt(dentry->d_sb, XATTR_USER);
19 }
20
21 static int
ext4_xattr_user_get(const struct xattr_handler * handler,struct dentry * unused,struct inode * inode,const char * name,void * buffer,size_t size)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
ext4_xattr_user_set(const struct xattr_handler * handler,struct user_namespace * mnt_userns,struct dentry * unused,struct inode * inode,const char * name,const void * value,size_t size,int flags)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 };
51