vstafs.h

i386的bootloader源码grub

/*
 *  GRUB  --  GRand Unified Bootloader
 *  Copyright (C) 2001   Free Software Foundation, Inc.
 *
 *  This program 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.
 */


#ifndef VSTAFS_H
#define VSTAFS_H	1


#define LINE			16
#define BLOCK_SIZE		512
#define VSTAFS_START_DATA	320

struct bootrecord
{
  unsigned char flag;
  unsigned char s_sector;
  unsigned char s_head;
  unsigned char s_cylinder;
  unsigned char p_type;
  unsigned char e_sector;
  unsigned char e_head;
  unsigned char e_cylinder;
  unsigned long start_lba;
  unsigned long nr_sector_lba;
};

struct alloc
{
  unsigned long a_start;
  unsigned long a_len;
};

struct first_sector
{
  unsigned long fs_magic;
  unsigned long fs_size;
  unsigned long fs_extsize;
  unsigned long fs_free;
  struct  alloc fs_freesecs[0];
};

struct prot
{
  unsigned char len;
  unsigned char pdefault;
  unsigned char id[7];
  unsigned char bits[7];
};

struct fs_file
{
  unsigned long prev;
  unsigned long rev;
  unsigned long len;
  unsigned short type;
  unsigned short nlink;
  struct prot pprot;
  unsigned int owner;
  unsigned int extents;
  struct alloc blocks[32];
  long fs_ctime, fs_mtime; /* it is not lon but time_t */
  char pad[16];
  char data[0];
};

struct dir_entry
{
  char name[28];
  unsigned long start;
};

#endif /* ! VSTAFS_H */