tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * JFFS2 -- Journalling Flash File System, Version 2.
3 *
4 * Copyright (C) 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#include <linux/kernel.h>
12#include <linux/slab.h>
13#include <linux/fs.h>
14#include <linux/time.h>
15#include <linux/pagemap.h>
16#include <linux/highmem.h>
17#include <linux/crc32.h>
18#include <linux/jffs2.h>
19#include <linux/xattr.h>
20#include <linux/mtd/mtd.h>
21#include <linux/security.h>
22#include "nodelist.h"
23
24/* ---- Initial Security Label Attachment -------------- */
25int jffs2_init_security(struct inode *inode, struct inode *dir)
26{
27 int rc;
28 size_t len;
29 void *value;
30 char *name;
31
32 rc = security_inode_init_security(inode, dir, &name, &value, &len);
33 if (rc) {
34 if (rc == -EOPNOTSUPP)
35 return 0;
36 return rc;
37 }
38 rc = do_jffs2_setxattr(inode, JFFS2_XPREFIX_SECURITY, name, value, len, 0);
39
40 kfree(name);
41 kfree(value);
42 return rc;
43}
44
45/* ---- XATTR Handler for "security.*" ----------------- */
46static int jffs2_security_getxattr(struct inode *inode, const char *name,
47 void *buffer, size_t size)
48{
49 if (!strcmp(name, ""))
50 return -EINVAL;
51
52 return do_jffs2_getxattr(inode, JFFS2_XPREFIX_SECURITY, name, buffer, size);
53}
54
55static int jffs2_security_setxattr(struct inode *inode, const char *name, const void *buffer,
56 size_t size, int flags)
57{
58 if (!strcmp(name, ""))
59 return -EINVAL;
60
61 return do_jffs2_setxattr(inode, JFFS2_XPREFIX_SECURITY, name, buffer, size, flags);
62}
63
64static size_t jffs2_security_listxattr(struct inode *inode, char *list, size_t list_size,
65 const char *name, size_t name_len)
66{
67 size_t retlen = XATTR_SECURITY_PREFIX_LEN + name_len + 1;
68
69 if (list && retlen <= list_size) {
70 strcpy(list, XATTR_SECURITY_PREFIX);
71 strcpy(list + XATTR_SECURITY_PREFIX_LEN, name);
72 }
73
74 return retlen;
75}
76
77struct xattr_handler jffs2_security_xattr_handler = {
78 .prefix = XATTR_SECURITY_PREFIX,
79 .list = jffs2_security_listxattr,
80 .set = jffs2_security_setxattr,
81 .get = jffs2_security_getxattr
82};