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