include/file.h

/*
    Definitions for talking to the Open Firmware PROM on
    Power Macintosh computers.

    Copyright (C) 1999 Benjamin Herrenschmidt

    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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

#ifndef FILE_H
#define FILE_H

#include "types.h"
#include "stddef.h"
#include "prom.h"

struct boot_file_t;
#include "fs.h"

#define FILE_MAX_PATH		1024

/* Simple error codes */
#define FILE_ERR_OK		0
#define FILE_ERR_EOF		-1
#define FILE_ERR_NOTFOUND	-2
#define FILE_CANT_SEEK		-3
#define FILE_IOERR		-4
#define FILE_BAD_PATH		-5
#define FILE_ERR_BAD_TYPE       -6
#define FILE_ERR_BAD_FSYS       -7
#define FILE_ERR_SYMLINK_LOOP   -8
#define FILE_ERR_LENGTH         -9

/* Device kind */
#define FILE_DEVICE_BLOCK	1
#define FILE_DEVICE_NET		2

struct boot_fspec_t {
	char*	dev;		/* OF device path */
	int	part;		/* Partition number or -1 */
	char*	file;		/* File path */
};

struct boot_file_t {

	/* File access methods */
        const struct fs_t *fs;

	/* Filesystem private (to be broken once we have a
	 * better malloc'ator)
	 */

	int		device_kind;
	ihandle		of_device;
	ino_t		inode;
	__u64           pos;
	unsigned char*	buffer;
	__u64   	len;
//	unsigned int	dev_blk_size;
//	unsigned int	part_start;
//	unsigned int	part_count;
};

extern int open_file(	const struct boot_fspec_t*	spec,
			struct boot_file_t*		file);

extern int validate_fspec(
			struct boot_fspec_t*	spec,
			char*			default_device,
			int			default_part);
extern char *parse_device_path(
			char*			of_device,
			char**			file_spec,
			int*			partition);



#endif