1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * linux/fs/ext4/xattr_security.c
 4 * Handler for storing security labels as extended attributes.
 5 */
 6
 7#include <linux/string.h>
 8#include <linux/fs.h>
 9#include <linux/security.h>
10#include <linux/slab.h>
11#include "ext4_jbd2.h"
12#include "ext4.h"
13#include "xattr.h"
14
15static int
16ext4_xattr_security_get(const struct xattr_handler *handler,
17			struct dentry *unused, struct inode *inode,
18			const char *name, void *buffer, size_t size)
19{
20	return ext4_xattr_get(inode, EXT4_XATTR_INDEX_SECURITY,
21			      name, buffer, size);
22}
23
24static int
25ext4_xattr_security_set(const struct xattr_handler *handler,
26			struct user_namespace *mnt_userns,
27			struct dentry *unused, struct inode *inode,
28			const char *name, const void *value,
29			size_t size, int flags)
30{
31	return ext4_xattr_set(inode, EXT4_XATTR_INDEX_SECURITY,
32			      name, value, size, flags);
33}
34
35static int
36ext4_initxattrs(struct inode *inode, const struct xattr *xattr_array,
37		void *fs_info)
38{
39	const struct xattr *xattr;
40	handle_t *handle = fs_info;
41	int err = 0;
42
43	for (xattr = xattr_array; xattr->name != NULL; xattr++) {
44		err = ext4_xattr_set_handle(handle, inode,
45					    EXT4_XATTR_INDEX_SECURITY,
46					    xattr->name, xattr->value,
47					    xattr->value_len, XATTR_CREATE);
48		if (err < 0)
49			break;
50	}
51	return err;
52}
53
54int
55ext4_init_security(handle_t *handle, struct inode *inode, struct inode *dir,
56		   const struct qstr *qstr)
57{
58	return security_inode_init_security(inode, dir, qstr,
59					    &ext4_initxattrs, handle);
60}
61
62const struct xattr_handler ext4_xattr_security_handler = {
63	.prefix	= XATTR_SECURITY_PREFIX,
64	.get	= ext4_xattr_security_get,
65	.set	= ext4_xattr_security_set,
66};

 1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * linux/fs/ext4/xattr_security.c
 4 * Handler for storing security labels as extended attributes.
 5 */
 6
 7#include <linux/string.h>
 8#include <linux/fs.h>
 9#include <linux/security.h>
10#include <linux/slab.h>
11#include "ext4_jbd2.h"
12#include "ext4.h"
13#include "xattr.h"
14
15static int
16ext4_xattr_security_get(const struct xattr_handler *handler,
17			struct dentry *unused, struct inode *inode,
18			const char *name, void *buffer, size_t size)
19{
20	return ext4_xattr_get(inode, EXT4_XATTR_INDEX_SECURITY,
21			      name, buffer, size);
22}
23
24static int
25ext4_xattr_security_set(const struct xattr_handler *handler,
 
26			struct dentry *unused, struct inode *inode,
27			const char *name, const void *value,
28			size_t size, int flags)
29{
30	return ext4_xattr_set(inode, EXT4_XATTR_INDEX_SECURITY,
31			      name, value, size, flags);
32}
33
34static int
35ext4_initxattrs(struct inode *inode, const struct xattr *xattr_array,
36		void *fs_info)
37{
38	const struct xattr *xattr;
39	handle_t *handle = fs_info;
40	int err = 0;
41
42	for (xattr = xattr_array; xattr->name != NULL; xattr++) {
43		err = ext4_xattr_set_handle(handle, inode,
44					    EXT4_XATTR_INDEX_SECURITY,
45					    xattr->name, xattr->value,
46					    xattr->value_len, 0);
47		if (err < 0)
48			break;
49	}
50	return err;
51}
52
53int
54ext4_init_security(handle_t *handle, struct inode *inode, struct inode *dir,
55		   const struct qstr *qstr)
56{
57	return security_inode_init_security(inode, dir, qstr,
58					    &ext4_initxattrs, handle);
59}
60
61const struct xattr_handler ext4_xattr_security_handler = {
62	.prefix	= XATTR_SECURITY_PREFIX,
63	.get	= ext4_xattr_security_get,
64	.set	= ext4_xattr_security_set,
65};