/* vi: set sw=4 ts=4: *//* * rs_bitmap.c --- routine for changing the size of a bitmap * * Copyright (C) 1996, 1997 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>#ifdef HAVE_SYS_STAT_H#include <sys/stat.h>#endif#ifdef HAVE_SYS_TYPES_H#include <sys/types.h>#endif#include "ext2_fs.h"#include "ext2fs.h"errcode_t ext2fs_resize_generic_bitmap(__u32 new_end, __u32 new_real_end,				       ext2fs_generic_bitmap bmap){	errcode_t	retval;	size_t		size, new_size;	__u32		bitno;	if (!bmap)		return EXT2_ET_INVALID_ARGUMENT;	EXT2_CHECK_MAGIC(bmap, EXT2_ET_MAGIC_GENERIC_BITMAP);	/*	 * If we're expanding the bitmap, make sure all of the new	 * parts of the bitmap are zero.	 */	if (new_end > bmap->end) {		bitno = bmap->real_end;		if (bitno > new_end)			bitno = new_end;		for (; bitno > bmap->end; bitno--)			ext2fs_clear_bit(bitno - bmap->start, bmap->bitmap);	}	if (new_real_end == bmap->real_end) {		bmap->end = new_end;		return 0;	}	size = ((bmap->real_end - bmap->start) / 8) + 1;	new_size = ((new_real_end - bmap->start) / 8) + 1;	if (size != new_size) {		retval = ext2fs_resize_mem(size, new_size, &bmap->bitmap);		if (retval)			return retval;	}	if (new_size > size)		memset(bmap->bitmap + size, 0, new_size - size);	bmap->end = new_end;	bmap->real_end = new_real_end;	return 0;}errcode_t ext2fs_resize_inode_bitmap(__u32 new_end, __u32 new_real_end,				     ext2fs_inode_bitmap bmap){	errcode_t	retval;	if (!bmap)		return EXT2_ET_INVALID_ARGUMENT;	EXT2_CHECK_MAGIC(bmap, EXT2_ET_MAGIC_INODE_BITMAP);	bmap->magic = EXT2_ET_MAGIC_GENERIC_BITMAP;	retval = ext2fs_resize_generic_bitmap(new_end, new_real_end,					      bmap);	bmap->magic = EXT2_ET_MAGIC_INODE_BITMAP;	return retval;}errcode_t ext2fs_resize_block_bitmap(__u32 new_end, __u32 new_real_end,				     ext2fs_block_bitmap bmap){	errcode_t	retval;	if (!bmap)		return EXT2_ET_INVALID_ARGUMENT;	EXT2_CHECK_MAGIC(bmap, EXT2_ET_MAGIC_BLOCK_BITMAP);	bmap->magic = EXT2_ET_MAGIC_GENERIC_BITMAP;	retval = ext2fs_resize_generic_bitmap(new_end, new_real_end,					      bmap);	bmap->magic = EXT2_ET_MAGIC_BLOCK_BITMAP;	return retval;}