/*
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* newdir.c --- create a new directory block
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*
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* Copyright (C) 1994, 1995 Theodore Ts'o.
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*
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* %Begin-Header%
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* This file may be redistributed under the terms of the GNU Library
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* General Public License, version 2.
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* %End-Header%
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*/
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#include "config.h"
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#include <stdio.h>
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#include <string.h>
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#if HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include "ext2_fs.h"
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#include "ext2fs.h"
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#ifndef EXT2_FT_DIR
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#define EXT2_FT_DIR 2
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#endif
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/*
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* Create new directory block
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*/
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errcode_t ext2fs_new_dir_block(ext2_filsys fs, ext2_ino_t dir_ino,
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ext2_ino_t parent_ino, char **block)
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{
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struct ext2_dir_entry *dir = NULL;
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errcode_t retval;
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char *buf;
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int rec_len;
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int filetype = 0;
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struct ext2_dir_entry_tail *t;
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int csum_size = 0;
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EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
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retval = ext2fs_get_mem(fs->blocksize, &buf);
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if (retval)
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return retval;
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memset(buf, 0, fs->blocksize);
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dir = (struct ext2_dir_entry *) buf;
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if (ext2fs_has_feature_metadata_csum(fs->super))
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csum_size = sizeof(struct ext2_dir_entry_tail);
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retval = ext2fs_set_rec_len(fs, fs->blocksize - csum_size, dir);
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if (retval) {
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ext2fs_free_mem(&buf);
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return retval;
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}
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if (dir_ino) {
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if (ext2fs_has_feature_filetype(fs->super))
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filetype = EXT2_FT_DIR;
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/*
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* Set up entry for '.'
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*/
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dir->inode = dir_ino;
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ext2fs_dirent_set_name_len(dir, 1);
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ext2fs_dirent_set_file_type(dir, filetype);
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dir->name[0] = '.';
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rec_len = (fs->blocksize - csum_size) - EXT2_DIR_REC_LEN(1);
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dir->rec_len = EXT2_DIR_REC_LEN(1);
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/*
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* Set up entry for '..'
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*/
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dir = (struct ext2_dir_entry *) (buf + dir->rec_len);
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retval = ext2fs_set_rec_len(fs, rec_len, dir);
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if (retval) {
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ext2fs_free_mem(&buf);
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return retval;
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}
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dir->inode = parent_ino;
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ext2fs_dirent_set_name_len(dir, 2);
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ext2fs_dirent_set_file_type(dir, filetype);
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dir->name[0] = '.';
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dir->name[1] = '.';
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}
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if (csum_size) {
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t = EXT2_DIRENT_TAIL(buf, fs->blocksize);
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ext2fs_initialize_dirent_tail(fs, t);
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}
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*block = buf;
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return 0;
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}
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/*
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* Create new directory on inline data
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*/
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errcode_t ext2fs_new_dir_inline_data(ext2_filsys fs,
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ext2_ino_t dir_ino EXT2FS_ATTR((unused)),
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ext2_ino_t parent_ino, __u32 *iblock)
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{
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struct ext2_dir_entry *dir = NULL;
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errcode_t retval;
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int rec_len;
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EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
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iblock[0] = ext2fs_cpu_to_le32(parent_ino);
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dir = (struct ext2_dir_entry *)((char *)iblock +
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EXT4_INLINE_DATA_DOTDOT_SIZE);
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dir->inode = 0;
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rec_len = EXT4_MIN_INLINE_DATA_SIZE - EXT4_INLINE_DATA_DOTDOT_SIZE;
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retval = ext2fs_set_rec_len(fs, rec_len, dir);
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if (retval)
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goto errout;
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#ifdef WORDS_BIGENDIAN
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retval = ext2fs_dirent_swab_out2(fs, (char *)dir, rec_len, 0);
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if (retval)
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goto errout;
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#endif
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errout:
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return retval;
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}
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