Merge branch 'akpm' (patches from Andrew)
[cascardo/linux.git] / fs / ext4 / xattr_user.c
1 /*
2  * linux/fs/ext4/xattr_user.c
3  * Handler for extended user attributes.
4  *
5  * Copyright (C) 2001 by Andreas Gruenbacher, <a.gruenbacher@computer.org>
6  */
7
8 #include <linux/string.h>
9 #include <linux/fs.h>
10 #include "ext4_jbd2.h"
11 #include "ext4.h"
12 #include "xattr.h"
13
14 static bool
15 ext4_xattr_user_list(struct dentry *dentry)
16 {
17         return test_opt(dentry->d_sb, XATTR_USER);
18 }
19
20 static int
21 ext4_xattr_user_get(const struct xattr_handler *handler,
22                     struct dentry *unused, struct inode *inode,
23                     const char *name, void *buffer, size_t size)
24 {
25         if (!test_opt(inode->i_sb, XATTR_USER))
26                 return -EOPNOTSUPP;
27         return ext4_xattr_get(inode, EXT4_XATTR_INDEX_USER,
28                               name, buffer, size);
29 }
30
31 static int
32 ext4_xattr_user_set(const struct xattr_handler *handler,
33                     struct dentry *unused, struct inode *inode,
34                     const char *name, const void *value,
35                     size_t size, int flags)
36 {
37         if (!test_opt(inode->i_sb, XATTR_USER))
38                 return -EOPNOTSUPP;
39         return ext4_xattr_set(inode, EXT4_XATTR_INDEX_USER,
40                               name, value, size, flags);
41 }
42
43 const struct xattr_handler ext4_xattr_user_handler = {
44         .prefix = XATTR_USER_PREFIX,
45         .list   = ext4_xattr_user_list,
46         .get    = ext4_xattr_user_get,
47         .set    = ext4_xattr_user_set,
48 };