1/*
 2 * JFFS2 -- Journalling Flash File System, Version 2.
 3 *
 4 * Copyright © 2006  NEC Corporation
 5 *
 6 * Created by KaiGai Kohei <kaigai@ak.jp.nec.com>
 7 *
 8 * For licensing information, see the file 'LICENCE' in this directory.
 9 *
10 */
11
12#include <linux/kernel.h>
13#include <linux/slab.h>
14#include <linux/fs.h>
15#include <linux/time.h>
16#include <linux/pagemap.h>
17#include <linux/highmem.h>
18#include <linux/crc32.h>
19#include <linux/jffs2.h>
20#include <linux/xattr.h>
21#include <linux/mtd/mtd.h>
22#include <linux/security.h>
23#include "nodelist.h"
24
25/* ---- Initial Security Label(s) Attachment callback --- */
26static int jffs2_initxattrs(struct inode *inode,
27			    const struct xattr *xattr_array, void *fs_info)
28{
29	const struct xattr *xattr;
30	int err = 0;
 
 
31
32	for (xattr = xattr_array; xattr->name != NULL; xattr++) {
33		err = do_jffs2_setxattr(inode, JFFS2_XPREFIX_SECURITY,
34					xattr->name, xattr->value,
35					xattr->value_len, 0);
36		if (err < 0)
37			break;
38	}
39	return err;
40}
41
42/* ---- Initial Security Label(s) Attachment ----------- */
43int jffs2_init_security(struct inode *inode, struct inode *dir,
44			const struct qstr *qstr)
45{
46	return security_inode_init_security(inode, dir, qstr,
47					    &jffs2_initxattrs, NULL);
48}
49
50/* ---- XATTR Handler for "security.*" ----------------- */
51static int jffs2_security_getxattr(const struct xattr_handler *handler,
52				   struct dentry *unused, struct inode *inode,
53				   const char *name, void *buffer, size_t size)
54{
55	return do_jffs2_getxattr(inode, JFFS2_XPREFIX_SECURITY,
 
 
 
56				 name, buffer, size);
57}
58
59static int jffs2_security_setxattr(const struct xattr_handler *handler,
60				   struct mnt_idmap *idmap,
61				   struct dentry *unused, struct inode *inode,
62				   const char *name, const void *buffer,
63				   size_t size, int flags)
64{
65	return do_jffs2_setxattr(inode, JFFS2_XPREFIX_SECURITY,
 
 
 
66				 name, buffer, size, flags);
67}
68
 
 
 
 
 
 
 
 
 
 
 
 
 
69const struct xattr_handler jffs2_security_xattr_handler = {
70	.prefix = XATTR_SECURITY_PREFIX,
 
71	.set = jffs2_security_setxattr,
72	.get = jffs2_security_getxattr
73};

 1/*
 2 * JFFS2 -- Journalling Flash File System, Version 2.
 3 *
 4 * Copyright © 2006  NEC Corporation
 5 *
 6 * Created by KaiGai Kohei <kaigai@ak.jp.nec.com>
 7 *
 8 * For licensing information, see the file 'LICENCE' in this directory.
 9 *
10 */
11
12#include <linux/kernel.h>
13#include <linux/slab.h>
14#include <linux/fs.h>
15#include <linux/time.h>
16#include <linux/pagemap.h>
17#include <linux/highmem.h>
18#include <linux/crc32.h>
19#include <linux/jffs2.h>
20#include <linux/xattr.h>
21#include <linux/mtd/mtd.h>
22#include <linux/security.h>
23#include "nodelist.h"
24
25/* ---- Initial Security Label Attachment -------------- */
26int jffs2_init_security(struct inode *inode, struct inode *dir,
27			const struct qstr *qstr)
28{
29	int rc;
30	size_t len;
31	void *value;
32	char *name;
33
34	rc = security_inode_init_security(inode, dir, qstr, &name, &value, &len);
35	if (rc) {
36		if (rc == -EOPNOTSUPP)
37			return 0;
38		return rc;
 
39	}
40	rc = do_jffs2_setxattr(inode, JFFS2_XPREFIX_SECURITY, name, value, len, 0);
 
41
42	kfree(name);
43	kfree(value);
44	return rc;
 
 
 
45}
46
47/* ---- XATTR Handler for "security.*" ----------------- */
48static int jffs2_security_getxattr(struct dentry *dentry, const char *name,
49				   void *buffer, size_t size, int type)
 
50{
51	if (!strcmp(name, ""))
52		return -EINVAL;
53
54	return do_jffs2_getxattr(dentry->d_inode, JFFS2_XPREFIX_SECURITY,
55				 name, buffer, size);
56}
57
58static int jffs2_security_setxattr(struct dentry *dentry, const char *name,
59		const void *buffer, size_t size, int flags, int type)
 
 
 
60{
61	if (!strcmp(name, ""))
62		return -EINVAL;
63
64	return do_jffs2_setxattr(dentry->d_inode, JFFS2_XPREFIX_SECURITY,
65				 name, buffer, size, flags);
66}
67
68static size_t jffs2_security_listxattr(struct dentry *dentry, char *list,
69		size_t list_size, const char *name, size_t name_len, int type)
70{
71	size_t retlen = XATTR_SECURITY_PREFIX_LEN + name_len + 1;
72
73	if (list && retlen <= list_size) {
74		strcpy(list, XATTR_SECURITY_PREFIX);
75		strcpy(list + XATTR_SECURITY_PREFIX_LEN, name);
76	}
77
78	return retlen;
79}
80
81const struct xattr_handler jffs2_security_xattr_handler = {
82	.prefix = XATTR_SECURITY_PREFIX,
83	.list = jffs2_security_listxattr,
84	.set = jffs2_security_setxattr,
85	.get = jffs2_security_getxattr
86};