lib/ext2fs/bitmaps.c

/*
 * bitmaps.c --- routines to read, write, and manipulate the inode and
 * block bitmaps.
 *
 * Copyright (C) 1993, 1994, 1995, 1996 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"

void ext2fs_free_inode_bitmap(ext2fs_inode_bitmap bitmap)
{
	ext2fs_free_generic_bitmap(bitmap);
}

void ext2fs_free_block_bitmap(ext2fs_block_bitmap bitmap)
{
	ext2fs_free_generic_bitmap(bitmap);
}

errcode_t ext2fs_copy_bitmap(ext2fs_generic_bitmap src,
			     ext2fs_generic_bitmap *dest)
{
	return (ext2fs_copy_generic_bitmap(src, dest));
}

void ext2fs_set_bitmap_padding(ext2fs_generic_bitmap map)
{
	ext2fs_set_generic_bitmap_padding(map);
}	

errcode_t ext2fs_allocate_inode_bitmap(ext2_filsys fs,
				       const char *descr,
				       ext2fs_inode_bitmap *ret)
{
	errcode_t	retval;
	__u32		start, end, real_end;

	EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);

	fs->write_bitmaps = ext2fs_write_bitmaps;

	start = 1;
	end = fs->super->s_inodes_count;
	real_end = (EXT2_INODES_PER_GROUP(fs->super) * fs->group_desc_count);

	return (ext2fs_make_generic_bitmap(EXT2_ET_MAGIC_INODE_BITMAP, fs,
					   start, end, real_end,
					   descr, 0, ret));
}

errcode_t ext2fs_allocate_block_bitmap(ext2_filsys fs,
				       const char *descr,
				       ext2fs_block_bitmap *ret)
{
	errcode_t	retval;
	__u32		start, end, real_end;

	EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);

	fs->write_bitmaps = ext2fs_write_bitmaps;

	start = fs->super->s_first_data_block;
	end = fs->super->s_blocks_count-1;
	real_end = (EXT2_BLOCKS_PER_GROUP(fs->super)  
		    * fs->group_desc_count)-1 + start;
	
	return (ext2fs_make_generic_bitmap(EXT2_ET_MAGIC_BLOCK_BITMAP, fs,
					   start, end, real_end,
					   descr, 0, ret));
}

errcode_t ext2fs_fudge_inode_bitmap_end(ext2fs_inode_bitmap bitmap,
					ext2_ino_t end, ext2_ino_t *oend)
{

	return (ext2fs_fudge_generic_bitmap_end(bitmap,
						EXT2_ET_MAGIC_INODE_BITMAP,
						EXT2_ET_FUDGE_INODE_BITMAP_END,
						end, oend));
}

errcode_t ext2fs_fudge_block_bitmap_end(ext2fs_block_bitmap bitmap,
					blk_t end, blk_t *oend)
{
	return (ext2fs_fudge_generic_bitmap_end(bitmap,
						EXT2_ET_MAGIC_BLOCK_BITMAP,
						EXT2_ET_FUDGE_BLOCK_BITMAP_END,
						end, oend));
}

void ext2fs_clear_inode_bitmap(ext2fs_inode_bitmap bitmap)
{
	ext2fs_clear_generic_bitmap(bitmap);
}

void ext2fs_clear_block_bitmap(ext2fs_block_bitmap bitmap)
{
	ext2fs_clear_generic_bitmap(bitmap);
}