/* vi: set sw=4 ts=4: *//* * mkdir.c --- make a directory in the filesystem * * Copyright (C) 1994, 1995 Theodore Ts'o. * * %Begin-Header% * This file may be redistributed under the terms of the GNU Public * License. * %End-Header% */#include <stdio.h>#include <string.h>#if HAVE_UNISTD_H#include <unistd.h>#endif#include <fcntl.h>#include <time.h>#if HAVE_SYS_STAT_H#include <sys/stat.h>#endif#if HAVE_SYS_TYPES_H#include <sys/types.h>#endif#include "ext2_fs.h"#include "ext2fs.h"#ifndef EXT2_FT_DIR#define EXT2_FT_DIR		2#endiferrcode_t ext2fs_mkdir(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t inum,		       const char *name){	errcode_t		retval;	struct ext2_inode	parent_inode, inode;	ext2_ino_t		ino = inum;	ext2_ino_t		scratch_ino;	blk_t			blk;	char			*block = 0;	EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);	/*	 * Allocate an inode, if necessary	 */	if (!ino) {		retval = ext2fs_new_inode(fs, parent, LINUX_S_IFDIR | 0755,					  0, &ino);		if (retval)			goto cleanup;	}	/*	 * Allocate a data block for the directory	 */	retval = ext2fs_new_block(fs, 0, 0, &blk);	if (retval)		goto cleanup;	/*	 * Create a scratch template for the directory	 */	retval = ext2fs_new_dir_block(fs, ino, parent, &block);	if (retval)		goto cleanup;	/*	 * Get the parent's inode, if necessary	 */	if (parent != ino) {		retval = ext2fs_read_inode(fs, parent, &parent_inode);		if (retval)			goto cleanup;	} else		memset(&parent_inode, 0, sizeof(parent_inode));	/*	 * Create the inode structure....	 */	memset(&inode, 0, sizeof(struct ext2_inode));	inode.i_mode = LINUX_S_IFDIR | (0777 & ~fs->umask);	inode.i_uid = inode.i_gid = 0;	inode.i_blocks = fs->blocksize / 512;	inode.i_block[0] = blk;	inode.i_links_count = 2;	inode.i_ctime = inode.i_atime = inode.i_mtime = time(NULL);	inode.i_size = fs->blocksize;	/*	 * Write out the inode and inode data block	 */	retval = ext2fs_write_dir_block(fs, blk, block);	if (retval)		goto cleanup;	retval = ext2fs_write_new_inode(fs, ino, &inode);	if (retval)		goto cleanup;	/*	 * Link the directory into the filesystem hierarchy	 */	if (name) {		retval = ext2fs_lookup(fs, parent, name, strlen(name), 0,				       &scratch_ino);		if (!retval) {			retval = EXT2_ET_DIR_EXISTS;			name = 0;			goto cleanup;		}		if (retval != EXT2_ET_FILE_NOT_FOUND)			goto cleanup;		retval = ext2fs_link(fs, parent, name, ino, EXT2_FT_DIR);		if (retval)			goto cleanup;	}	/*	 * Update parent inode's counts	 */	if (parent != ino) {		parent_inode.i_links_count++;		retval = ext2fs_write_inode(fs, parent, &parent_inode);		if (retval)			goto cleanup;	}	/*	 * Update accounting....	 */	ext2fs_block_alloc_stats(fs, blk, +1);	ext2fs_inode_alloc_stats2(fs, ino, +1, 1);cleanup:	ext2fs_free_mem(&block);	return retval;}