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/*
* 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;
}
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