blob: 0f20208df60278c9f63f6c14c7b626cfd632ebf2 [file] [log] [blame]
KaiGai Kohei652ecc22006-05-13 15:18:27 +09001/*
2 * JFFS2 -- Journalling Flash File System, Version 2.
KaiGai Koheiaa98d7c2006-05-13 15:09:47 +09003 *
David Woodhousec00c3102007-04-25 14:16:47 +01004 * Copyright © 2006 NEC Corporation
KaiGai Koheiaa98d7c2006-05-13 15:09:47 +09005 *
KaiGai Kohei652ecc22006-05-13 15:18:27 +09006 * Created by KaiGai Kohei <kaigai@ak.jp.nec.com>
7 *
8 * For licensing information, see the file 'LICENCE' in this directory.
9 *
10 */
David Woodhousec00c3102007-04-25 14:16:47 +010011
KaiGai Koheiaa98d7c2006-05-13 15:09:47 +090012#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
Mimi Zohar9d8f13b2011-06-06 15:29:25 -040025/* ---- Initial Security Label(s) Attachment callback --- */
26int jffs2_initxattrs(struct inode *inode, const struct xattr *xattr_array,
27 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 ----------- */
Eric Paris2a7dba32011-02-01 11:05:39 -050043int jffs2_init_security(struct inode *inode, struct inode *dir,
44 const struct qstr *qstr)
KaiGai Koheiaa98d7c2006-05-13 15:09:47 +090045{
Mimi Zohar9d8f13b2011-06-06 15:29:25 -040046 return security_inode_init_security(inode, dir, qstr,
47 &jffs2_initxattrs, NULL);
KaiGai Koheiaa98d7c2006-05-13 15:09:47 +090048}
49
50/* ---- XATTR Handler for "security.*" ----------------- */
Christoph Hellwig431547b2009-11-13 09:52:56 +000051static int jffs2_security_getxattr(struct dentry *dentry, const char *name,
52 void *buffer, size_t size, int type)
KaiGai Koheiaa98d7c2006-05-13 15:09:47 +090053{
54 if (!strcmp(name, ""))
55 return -EINVAL;
56
Christoph Hellwig431547b2009-11-13 09:52:56 +000057 return do_jffs2_getxattr(dentry->d_inode, JFFS2_XPREFIX_SECURITY,
58 name, buffer, size);
KaiGai Koheiaa98d7c2006-05-13 15:09:47 +090059}
60
Christoph Hellwig431547b2009-11-13 09:52:56 +000061static int jffs2_security_setxattr(struct dentry *dentry, const char *name,
62 const void *buffer, size_t size, int flags, int type)
KaiGai Koheiaa98d7c2006-05-13 15:09:47 +090063{
64 if (!strcmp(name, ""))
65 return -EINVAL;
66
Christoph Hellwig431547b2009-11-13 09:52:56 +000067 return do_jffs2_setxattr(dentry->d_inode, JFFS2_XPREFIX_SECURITY,
68 name, buffer, size, flags);
KaiGai Koheiaa98d7c2006-05-13 15:09:47 +090069}
70
Christoph Hellwig431547b2009-11-13 09:52:56 +000071static size_t jffs2_security_listxattr(struct dentry *dentry, char *list,
72 size_t list_size, const char *name, size_t name_len, int type)
KaiGai Koheiaa98d7c2006-05-13 15:09:47 +090073{
74 size_t retlen = XATTR_SECURITY_PREFIX_LEN + name_len + 1;
75
76 if (list && retlen <= list_size) {
77 strcpy(list, XATTR_SECURITY_PREFIX);
78 strcpy(list + XATTR_SECURITY_PREFIX_LEN, name);
79 }
80
81 return retlen;
82}
83
Stephen Hemminger365f0cb2010-05-13 17:53:21 -070084const struct xattr_handler jffs2_security_xattr_handler = {
KaiGai Koheiaa98d7c2006-05-13 15:09:47 +090085 .prefix = XATTR_SECURITY_PREFIX,
86 .list = jffs2_security_listxattr,
87 .set = jffs2_security_setxattr,
88 .get = jffs2_security_getxattr
89};