127 lines
2.7 KiB
C
127 lines
2.7 KiB
C
/*
|
|
* 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;
|
|
}
|