/*

 * newdir.c --- create a new directory block

 *

 * Copyright (C) 1994, 1995 Theodore Ts'o.

 *

 * %Begin-Header%

 * This file may be redistributed under the terms of the GNU Library

 * General Public License, version 2.

 * %End-Header%

 */

#include "config.h"

#include <stdio.h>

#include <string.h>

#if HAVE_UNISTD_H

#include <unistd.h>

#endif

#include "ext2_fs.h"

#include "ext2fs.h"

#ifndef EXT2_FT_DIR

#define EXT2_FT_DIR   2

#endif

/*

 * Create new directory block

 */

errcode_t ext2fs_new_dir_block(ext2_filsys fs, ext2_ino_t dir_ino,

             ext2_ino_t parent_ino, char **block)

{

  struct ext2_dir_entry   *dir = NULL;

  errcode_t   retval;

  char      *buf;

  int     rec_len;

  int     filetype = 0;

  struct ext2_dir_entry_tail  *t;

  int     csum_size = 0;

  EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);

  retval = ext2fs_get_mem(fs->blocksize, &buf);

  if (retval)

    return retval;

  memset(buf, 0, fs->blocksize);

  dir = (struct ext2_dir_entry *) buf;

  if (ext2fs_has_feature_metadata_csum(fs->super))

    csum_size = sizeof(struct ext2_dir_entry_tail);

  retval = ext2fs_set_rec_len(fs, fs->blocksize - csum_size, dir);

  if (retval) {

    ext2fs_free_mem(&buf);

    return retval;

  }

  if (dir_ino) {

    if (ext2fs_has_feature_filetype(fs->super))

      filetype = EXT2_FT_DIR;

    /*

     * Set up entry for '.'

     */

    dir->inode = dir_ino;

    ext2fs_dirent_set_name_len(dir, 1);

    ext2fs_dirent_set_file_type(dir, filetype);

    dir->name[0] = '.';

    rec_len = (fs->blocksize - csum_size) - EXT2_DIR_REC_LEN(1);

    dir->rec_len = EXT2_DIR_REC_LEN(1);

    /*

     * Set up entry for '..'

     */

    dir = (struct ext2_dir_entry *) (buf + dir->rec_len);

    retval = ext2fs_set_rec_len(fs, rec_len, dir);

    if (retval) {

      ext2fs_free_mem(&buf);

      return retval;

    }

    dir->inode = parent_ino;

    ext2fs_dirent_set_name_len(dir, 2);

    ext2fs_dirent_set_file_type(dir, filetype);

    dir->name[0] = '.';

    dir->name[1] = '.';

  }

  if (csum_size) {

    t = EXT2_DIRENT_TAIL(buf, fs->blocksize);

    ext2fs_initialize_dirent_tail(fs, t);

  }

  *block = buf;

  return 0;

}

/*

 * Create new directory on inline data

 */

errcode_t ext2fs_new_dir_inline_data(ext2_filsys fs,

             ext2_ino_t dir_ino EXT2FS_ATTR((unused)),

             ext2_ino_t parent_ino, __u32 *iblock)

{

  struct ext2_dir_entry   *dir = NULL;

  errcode_t   retval;

  int     rec_len;

  EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);

  iblock[0] = ext2fs_cpu_to_le32(parent_ino);

  dir = (struct ext2_dir_entry *)((char *)iblock +

          EXT4_INLINE_DATA_DOTDOT_SIZE);

  dir->inode = 0;

  rec_len = EXT4_MIN_INLINE_DATA_SIZE - EXT4_INLINE_DATA_DOTDOT_SIZE;

  retval = ext2fs_set_rec_len(fs, rec_len, dir);

  if (retval)

    goto errout;

#ifdef WORDS_BIGENDIAN

  retval = ext2fs_dirent_swab_out2(fs, (char *)dir, rec_len, 0);

  if (retval)

    goto errout;

#endif

errout:

  return retval;

}