90 lines
2.3 KiB
C
90 lines
2.3 KiB
C
/*
|
|
* JFFS2 -- Journalling Flash File System, Version 2.
|
|
*
|
|
* Copyright © 2006 NEC Corporation
|
|
*
|
|
* Created by KaiGai Kohei <kaigai@ak.jp.nec.com>
|
|
*
|
|
* For licensing information, see the file 'LICENCE' in this directory.
|
|
*
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/time.h>
|
|
#include <linux/pagemap.h>
|
|
#include <linux/highmem.h>
|
|
#include <linux/crc32.h>
|
|
#include <linux/jffs2.h>
|
|
#include <linux/xattr.h>
|
|
#include <linux/mtd/mtd.h>
|
|
#include <linux/security.h>
|
|
#include "nodelist.h"
|
|
|
|
/* ---- Initial Security Label(s) Attachment callback --- */
|
|
int jffs2_initxattrs(struct inode *inode, const struct xattr *xattr_array,
|
|
void *fs_info)
|
|
{
|
|
const struct xattr *xattr;
|
|
int err = 0;
|
|
|
|
for (xattr = xattr_array; xattr->name != NULL; xattr++) {
|
|
err = do_jffs2_setxattr(inode, JFFS2_XPREFIX_SECURITY,
|
|
xattr->name, xattr->value,
|
|
xattr->value_len, 0);
|
|
if (err < 0)
|
|
break;
|
|
}
|
|
return err;
|
|
}
|
|
|
|
/* ---- Initial Security Label(s) Attachment ----------- */
|
|
int jffs2_init_security(struct inode *inode, struct inode *dir,
|
|
const struct qstr *qstr)
|
|
{
|
|
return security_inode_init_security(inode, dir, qstr,
|
|
&jffs2_initxattrs, NULL);
|
|
}
|
|
|
|
/* ---- XATTR Handler for "security.*" ----------------- */
|
|
static int jffs2_security_getxattr(struct dentry *dentry, const char *name,
|
|
void *buffer, size_t size, int type)
|
|
{
|
|
if (!strcmp(name, ""))
|
|
return -EINVAL;
|
|
|
|
return do_jffs2_getxattr(dentry->d_inode, JFFS2_XPREFIX_SECURITY,
|
|
name, buffer, size);
|
|
}
|
|
|
|
static int jffs2_security_setxattr(struct dentry *dentry, const char *name,
|
|
const void *buffer, size_t size, int flags, int type)
|
|
{
|
|
if (!strcmp(name, ""))
|
|
return -EINVAL;
|
|
|
|
return do_jffs2_setxattr(dentry->d_inode, JFFS2_XPREFIX_SECURITY,
|
|
name, buffer, size, flags);
|
|
}
|
|
|
|
static size_t jffs2_security_listxattr(struct dentry *dentry, char *list,
|
|
size_t list_size, const char *name, size_t name_len, int type)
|
|
{
|
|
size_t retlen = XATTR_SECURITY_PREFIX_LEN + name_len + 1;
|
|
|
|
if (list && retlen <= list_size) {
|
|
strcpy(list, XATTR_SECURITY_PREFIX);
|
|
strcpy(list + XATTR_SECURITY_PREFIX_LEN, name);
|
|
}
|
|
|
|
return retlen;
|
|
}
|
|
|
|
const struct xattr_handler jffs2_security_xattr_handler = {
|
|
.prefix = XATTR_SECURITY_PREFIX,
|
|
.list = jffs2_security_listxattr,
|
|
.set = jffs2_security_setxattr,
|
|
.get = jffs2_security_getxattr
|
|
};
|