1// SPDX-License-Identifier: GPL-2.0
2/*
3 * linux/fs/ext2/xattr_security.c
4 * Handler for storing security labels as extended attributes.
5 */
6
7#include "ext2.h"
8#include <linux/security.h>
9#include "xattr.h"
10
11static int
12ext2_xattr_security_get(const struct xattr_handler *handler,
13			struct dentry *unused, struct inode *inode,
14			const char *name, void *buffer, size_t size)
15{
16	return ext2_xattr_get(inode, EXT2_XATTR_INDEX_SECURITY, name,
17			      buffer, size);
18}
19
20static int
21ext2_xattr_security_set(const struct xattr_handler *handler,
22			struct dentry *unused, struct inode *inode,
23			const char *name, const void *value,
24			size_t size, int flags)
25{
26	return ext2_xattr_set(inode, EXT2_XATTR_INDEX_SECURITY, name,
27			      value, size, flags);
28}
29
30static int ext2_initxattrs(struct inode *inode, const struct xattr *xattr_array,
31			   void *fs_info)
32{
33	const struct xattr *xattr;
34	int err = 0;
35
36	for (xattr = xattr_array; xattr->name != NULL; xattr++) {
37		err = ext2_xattr_set(inode, EXT2_XATTR_INDEX_SECURITY,
38				     xattr->name, xattr->value,
39				     xattr->value_len, 0);
40		if (err < 0)
41			break;
42	}
43	return err;
44}
45
46int
47ext2_init_security(struct inode *inode, struct inode *dir,
48		   const struct qstr *qstr)
49{
50	return security_inode_init_security(inode, dir, qstr,
51					    &ext2_initxattrs, NULL);
52}
53
54const struct xattr_handler ext2_xattr_security_handler = {
55	.prefix	= XATTR_SECURITY_PREFIX,
56	.get	= ext2_xattr_security_get,
57	.set	= ext2_xattr_security_set,
58};
59