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/*
* BSD FFS like functions used to ease porting bootstrap to Linux ext2 fs
* Copyright (C) 1994 Remy Card
*
* This file is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <device/device_types.h>
#include <device/device.h>
#include <mach/mach_traps.h>
#include <mach/mach_interface.h>
#include <file_io.h>
#define EXT2_INODES_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (struct ext2_inode))
int ino2blk (struct ext2_super_block *fs, struct ext2_group_desc *gd, int ino)
{
int group;
int blk;
group = (ino - 1) / EXT2_INODES_PER_GROUP(fs);
blk = gd[group].bg_inode_table +
(((ino - 1) % EXT2_INODES_PER_GROUP(fs)) /
EXT2_INODES_PER_BLOCK(fs));
return blk;
}
int fsbtodb (struct ext2_super_block *fs, int b)
{
return (b * EXT2_BLOCK_SIZE(fs)) / DEV_BSIZE;
}
int itoo (struct ext2_super_block *fs, int ino)
{
return (ino - 1) % EXT2_INODES_PER_BLOCK(fs);
}
int blkoff (struct ext2_super_block * fs, vm_offset_t offset)
{
return offset % EXT2_BLOCK_SIZE(fs);
}
int lblkno (struct ext2_super_block * fs, vm_offset_t offset)
{
return offset / EXT2_BLOCK_SIZE(fs);
}
int blksize (struct ext2_super_block *fs, struct file *fp, daddr_t file_block)
{
return EXT2_BLOCK_SIZE(fs); /* XXX - fix for fragments */
}
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