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/*-------------------------------------------------------------------------*
* File: fs/jffs2/security.c
* Security Labels support on JFFS2 FileSystem
*
* Implemented by KaiGai Kohei <kaigai@ak.jp.nec.com>
* Copyright (C) 2006 NEC Corporation
*
* For licensing information, see the file 'LICENCE' in the jffs2 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 Attachment -------------- */
int jffs2_init_security(struct inode *inode, struct inode *dir)
{
int rc;
size_t len;
void *value;
char *name;
rc = security_inode_init_security(inode, dir, &name, &value, &len);
if (rc) {
if (rc == -EOPNOTSUPP)
return 0;
return rc;
}
rc = do_jffs2_setxattr(inode, JFFS2_XPREFIX_SECURITY, name, value, len, 0);
kfree(name);
kfree(value);
return rc;
}
/* ---- XATTR Handler for "security.*" ----------------- */
static int jffs2_security_getxattr(struct inode *inode, const char *name,
void *buffer, size_t size)
{
if (!strcmp(name, ""))
return -EINVAL;
return do_jffs2_getxattr(inode, JFFS2_XPREFIX_SECURITY, name, buffer, size);
}
static int jffs2_security_setxattr(struct inode *inode, const char *name, const void *buffer,
size_t size, int flags)
{
if (!strcmp(name, ""))
return -EINVAL;
return do_jffs2_setxattr(inode, JFFS2_XPREFIX_SECURITY, name, buffer, size, flags);
}
static size_t jffs2_security_listxattr(struct inode *inode, char *list, size_t list_size,
const char *name, size_t name_len)
{
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;
}
struct xattr_handler jffs2_security_xattr_handler = {
.prefix = XATTR_SECURITY_PREFIX,
.list = jffs2_security_listxattr,
.set = jffs2_security_setxattr,
.get = jffs2_security_getxattr
};
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