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 xname: xattr->name, buffer: xattr->value,
35 size: xattr->value_len, flags: 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 initxattrs: &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 xname: 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 xname: 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};
74

source code of linux/fs/jffs2/security.c