1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * linux/fs/hfsplus/xattr_trusted.c
 4 *
 5 * Vyacheslav Dubeyko <slava@dubeyko.com>
 6 *
 7 * Handler for storing security labels as extended attributes.
 8 */
 9
10#include <linux/security.h>
11#include <linux/nls.h>
12
13#include "hfsplus_fs.h"
14#include "xattr.h"
15
16static int hfsplus_security_getxattr(const struct xattr_handler *handler,
17				     struct dentry *unused, struct inode *inode,
18				     const char *name, void *buffer, size_t size)
19{
20	return hfsplus_getxattr(inode, name, buffer, size,
21				XATTR_SECURITY_PREFIX,
22				XATTR_SECURITY_PREFIX_LEN);
23}
24
25static int hfsplus_security_setxattr(const struct xattr_handler *handler,
26				     struct user_namespace *mnt_userns,
27				     struct dentry *unused, struct inode *inode,
28				     const char *name, const void *buffer,
29				     size_t size, int flags)
30{
31	return hfsplus_setxattr(inode, name, buffer, size, flags,
32				XATTR_SECURITY_PREFIX,
33				XATTR_SECURITY_PREFIX_LEN);
34}
35
36static int hfsplus_initxattrs(struct inode *inode,
37				const struct xattr *xattr_array,
38				void *fs_info)
39{
40	const struct xattr *xattr;
41	char *xattr_name;
42	int err = 0;
43
44	xattr_name = kmalloc(NLS_MAX_CHARSET_SIZE * HFSPLUS_ATTR_MAX_STRLEN + 1,
45		GFP_KERNEL);
46	if (!xattr_name)
47		return -ENOMEM;
48	for (xattr = xattr_array; xattr->name != NULL; xattr++) {
49
50		if (!strcmp(xattr->name, ""))
51			continue;
52
53		strcpy(xattr_name, XATTR_SECURITY_PREFIX);
54		strcpy(xattr_name +
55			XATTR_SECURITY_PREFIX_LEN, xattr->name);
56		memset(xattr_name +
57			XATTR_SECURITY_PREFIX_LEN + strlen(xattr->name), 0, 1);
58
59		err = __hfsplus_setxattr(inode, xattr_name,
60					xattr->value, xattr->value_len, 0);
61		if (err)
62			break;
63	}
64	kfree(xattr_name);
65	return err;
66}
67
68int hfsplus_init_security(struct inode *inode, struct inode *dir,
69				const struct qstr *qstr)
70{
71	return security_inode_init_security(inode, dir, qstr,
72					&hfsplus_initxattrs, NULL);
73}
74
75const struct xattr_handler hfsplus_xattr_security_handler = {
76	.prefix	= XATTR_SECURITY_PREFIX,
77	.get	= hfsplus_security_getxattr,
78	.set	= hfsplus_security_setxattr,
79};

 1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * linux/fs/hfsplus/xattr_trusted.c
 4 *
 5 * Vyacheslav Dubeyko <slava@dubeyko.com>
 6 *
 7 * Handler for storing security labels as extended attributes.
 8 */
 9
10#include <linux/security.h>
11#include <linux/nls.h>
12
13#include "hfsplus_fs.h"
14#include "xattr.h"
15
16static int hfsplus_security_getxattr(const struct xattr_handler *handler,
17				     struct dentry *unused, struct inode *inode,
18				     const char *name, void *buffer, size_t size)
19{
20	return hfsplus_getxattr(inode, name, buffer, size,
21				XATTR_SECURITY_PREFIX,
22				XATTR_SECURITY_PREFIX_LEN);
23}
24
25static int hfsplus_security_setxattr(const struct xattr_handler *handler,
 
26				     struct dentry *unused, struct inode *inode,
27				     const char *name, const void *buffer,
28				     size_t size, int flags)
29{
30	return hfsplus_setxattr(inode, name, buffer, size, flags,
31				XATTR_SECURITY_PREFIX,
32				XATTR_SECURITY_PREFIX_LEN);
33}
34
35static int hfsplus_initxattrs(struct inode *inode,
36				const struct xattr *xattr_array,
37				void *fs_info)
38{
39	const struct xattr *xattr;
40	char *xattr_name;
41	int err = 0;
42
43	xattr_name = kmalloc(NLS_MAX_CHARSET_SIZE * HFSPLUS_ATTR_MAX_STRLEN + 1,
44		GFP_KERNEL);
45	if (!xattr_name)
46		return -ENOMEM;
47	for (xattr = xattr_array; xattr->name != NULL; xattr++) {
48
49		if (!strcmp(xattr->name, ""))
50			continue;
51
52		strcpy(xattr_name, XATTR_SECURITY_PREFIX);
53		strcpy(xattr_name +
54			XATTR_SECURITY_PREFIX_LEN, xattr->name);
55		memset(xattr_name +
56			XATTR_SECURITY_PREFIX_LEN + strlen(xattr->name), 0, 1);
57
58		err = __hfsplus_setxattr(inode, xattr_name,
59					xattr->value, xattr->value_len, 0);
60		if (err)
61			break;
62	}
63	kfree(xattr_name);
64	return err;
65}
66
67int hfsplus_init_security(struct inode *inode, struct inode *dir,
68				const struct qstr *qstr)
69{
70	return security_inode_init_security(inode, dir, qstr,
71					&hfsplus_initxattrs, NULL);
72}
73
74const struct xattr_handler hfsplus_xattr_security_handler = {
75	.prefix	= XATTR_SECURITY_PREFIX,
76	.get	= hfsplus_security_getxattr,
77	.set	= hfsplus_security_setxattr,
78};