1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * JFFS2 -- Journalling Flash File System, Version 2.
3*4882a593Smuzhiyun *
4*4882a593Smuzhiyun * Copyright © 2006 NEC Corporation
5*4882a593Smuzhiyun *
6*4882a593Smuzhiyun * Created by KaiGai Kohei <kaigai@ak.jp.nec.com>
7*4882a593Smuzhiyun *
8*4882a593Smuzhiyun * For licensing information, see the file 'LICENCE' in this directory.
9*4882a593Smuzhiyun *
10*4882a593Smuzhiyun */
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun #include <linux/kernel.h>
13*4882a593Smuzhiyun #include <linux/slab.h>
14*4882a593Smuzhiyun #include <linux/fs.h>
15*4882a593Smuzhiyun #include <linux/time.h>
16*4882a593Smuzhiyun #include <linux/pagemap.h>
17*4882a593Smuzhiyun #include <linux/highmem.h>
18*4882a593Smuzhiyun #include <linux/crc32.h>
19*4882a593Smuzhiyun #include <linux/jffs2.h>
20*4882a593Smuzhiyun #include <linux/xattr.h>
21*4882a593Smuzhiyun #include <linux/mtd/mtd.h>
22*4882a593Smuzhiyun #include <linux/security.h>
23*4882a593Smuzhiyun #include "nodelist.h"
24*4882a593Smuzhiyun
25*4882a593Smuzhiyun /* ---- Initial Security Label(s) Attachment callback --- */
jffs2_initxattrs(struct inode * inode,const struct xattr * xattr_array,void * fs_info)26*4882a593Smuzhiyun static int jffs2_initxattrs(struct inode *inode,
27*4882a593Smuzhiyun const struct xattr *xattr_array, void *fs_info)
28*4882a593Smuzhiyun {
29*4882a593Smuzhiyun const struct xattr *xattr;
30*4882a593Smuzhiyun int err = 0;
31*4882a593Smuzhiyun
32*4882a593Smuzhiyun for (xattr = xattr_array; xattr->name != NULL; xattr++) {
33*4882a593Smuzhiyun err = do_jffs2_setxattr(inode, JFFS2_XPREFIX_SECURITY,
34*4882a593Smuzhiyun xattr->name, xattr->value,
35*4882a593Smuzhiyun xattr->value_len, 0);
36*4882a593Smuzhiyun if (err < 0)
37*4882a593Smuzhiyun break;
38*4882a593Smuzhiyun }
39*4882a593Smuzhiyun return err;
40*4882a593Smuzhiyun }
41*4882a593Smuzhiyun
42*4882a593Smuzhiyun /* ---- Initial Security Label(s) Attachment ----------- */
jffs2_init_security(struct inode * inode,struct inode * dir,const struct qstr * qstr)43*4882a593Smuzhiyun int jffs2_init_security(struct inode *inode, struct inode *dir,
44*4882a593Smuzhiyun const struct qstr *qstr)
45*4882a593Smuzhiyun {
46*4882a593Smuzhiyun return security_inode_init_security(inode, dir, qstr,
47*4882a593Smuzhiyun &jffs2_initxattrs, NULL);
48*4882a593Smuzhiyun }
49*4882a593Smuzhiyun
50*4882a593Smuzhiyun /* ---- XATTR Handler for "security.*" ----------------- */
jffs2_security_getxattr(const struct xattr_handler * handler,struct dentry * unused,struct inode * inode,const char * name,void * buffer,size_t size,int flags)51*4882a593Smuzhiyun static int jffs2_security_getxattr(const struct xattr_handler *handler,
52*4882a593Smuzhiyun struct dentry *unused, struct inode *inode,
53*4882a593Smuzhiyun const char *name, void *buffer, size_t size,
54*4882a593Smuzhiyun int flags)
55*4882a593Smuzhiyun {
56*4882a593Smuzhiyun return do_jffs2_getxattr(inode, JFFS2_XPREFIX_SECURITY,
57*4882a593Smuzhiyun name, buffer, size);
58*4882a593Smuzhiyun }
59*4882a593Smuzhiyun
jffs2_security_setxattr(const struct xattr_handler * handler,struct dentry * unused,struct inode * inode,const char * name,const void * buffer,size_t size,int flags)60*4882a593Smuzhiyun static int jffs2_security_setxattr(const struct xattr_handler *handler,
61*4882a593Smuzhiyun struct dentry *unused, struct inode *inode,
62*4882a593Smuzhiyun const char *name, const void *buffer,
63*4882a593Smuzhiyun size_t size, int flags)
64*4882a593Smuzhiyun {
65*4882a593Smuzhiyun return do_jffs2_setxattr(inode, JFFS2_XPREFIX_SECURITY,
66*4882a593Smuzhiyun name, buffer, size, flags);
67*4882a593Smuzhiyun }
68*4882a593Smuzhiyun
69*4882a593Smuzhiyun const struct xattr_handler jffs2_security_xattr_handler = {
70*4882a593Smuzhiyun .prefix = XATTR_SECURITY_PREFIX,
71*4882a593Smuzhiyun .set = jffs2_security_setxattr,
72*4882a593Smuzhiyun .get = jffs2_security_getxattr
73*4882a593Smuzhiyun };
74