/*
   * 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
  };