/*
   * 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 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
  };