scsi-beos.c

创建一个符合iso-9660标准的iso文件系统

/* @(#)scsi-beos.c	1.11 00/07/01 Copyright 1998 J. Schilling */
#ifndef lint
static	char __sccsid[] =
	"@(#)scsi-beos.c	1.11 00/07/01 Copyright 1998 J. Schilling";
#endif
/*
 *	Interface for the BeOS user-land raw SCSI implementation.
 *
 *	This is a hack, that tries to emulate the functionality
 *	of the scg driver.
 *
 *	First version done by [e-mail]
 *
 *	Warning: you may change this source, but if you do that
 *	you need to change the _scg_version and _scg_auth* string below.
 *	You may not return "schily" for an SCG_AUTHOR request anymore.
 *	Choose your name instead of "schily" and make clear that the version
 *	string is related to a modified source.
 *
 *	Copyright (c) 1998 J. Schilling
 */
/*
 * 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, 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; see the file COPYING.  If not, write to
 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
 */

/* nasty hack to avoid broken def of bool in SupportDefs.h */
#define _SUPPORT_DEFS_H

#ifndef _SYS_TYPES_H
typedef unsigned long			ulong;
typedef unsigned int			uint;
typedef unsigned short			ushort;
#endif	/* _SYS_TYPES_H */

#include <BeBuild.h>
#include <sys/types.h>
#include <Errors.h>


/*
 *	Warning: you may change this source, but if you do that
 *	you need to change the _scg_version and _scg_auth* string below.
 *	You may not return "schily" for an SCG_AUTHOR request anymore.
 *	Choose your name instead of "schily" and make clear that the version
 *	string is related to a modified source.
 */
LOCAL	char	_scg_trans_version[] = "scsi-beos.c-1.11";	/* The version for this transport*/

/*-------------------------------------------------------------*/
/*----- Shorthand type formats --------------------------------*/

typedef	signed char			int8;
typedef unsigned char			uint8;
typedef volatile signed char		vint8;
typedef volatile unsigned char		vuint8;

typedef	short				int16;
typedef unsigned short			uint16;
typedef volatile short			vint16;
typedef volatile unsigned short		vuint16;

typedef	long				int32;
typedef unsigned long			uint32;
typedef volatile long			vint32;
typedef volatile unsigned long		vuint32;

typedef	long long			int64;
typedef unsigned long long		uint64;
typedef volatile long long		vint64;
typedef volatile unsigned long long	vuint64;

typedef volatile long			vlong;
typedef volatile int			vint;
typedef volatile short			vshort;
typedef volatile char			vchar;

typedef volatile unsigned long		vulong;
typedef volatile unsigned int		vuint;
typedef volatile unsigned short		vushort;
typedef volatile unsigned char		vuchar;

typedef unsigned char			uchar;
typedef unsigned short			unichar;


/*-------------------------------------------------------------*/
/*----- Descriptive formats -----------------------------------*/
typedef int32					status_t;
typedef int64					bigtime_t;
typedef uint32					type_code;
typedef uint32					perform_code;

/* end nasty hack */


#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/stat.h>
#include <scg/scgio.h>

/* this is really really dumb (tm) */
/*#undef sense*/
/*#undef scb*/
#include <device/scsi.h>

#undef bool
#include <drivers/CAM.h>

struct _fdmap_ {
	struct _fdmap_ *next;
	int bus;
	int targ;
	int lun;
	int fd;
};

/*
 * Return version information for the low level SCSI transport code.
 * This has been introduced to make it easier to trace down problems
 * in applications.
 */
EXPORT char *
scg__version(scgp, what)
	SCSI	*scgp;
	int	what;
{
	if (scgp != (SCSI *)0) {
		switch (what) {

		case SCG_VERSION:
			return (_scg_trans_version);
		/*
		 * If you changed this source, you are not allowed to
		 * return "schily" for the SCG_AUTHOR request.
		 */
		case SCG_AUTHOR:
			return (_scg_auth_schily);
		case SCG_SCCS_ID:
			return (__sccsid);
		}
	}
	return ((char *)0);
}

EXPORT int
scsi_open(scgp, device, busno, tgt, tlun)
	SCSI	*scgp;
	char	*device;
	int	busno;
	int	tgt;
	int	tlun;
{
#ifdef	nonono
	if (busno >= MAX_SCG || tgt >= MAX_TGT || tlun >= MAX_LUN) {
		errno = EINVAL;
		if (scgp->errstr)
			js_snprintf(scgp->errstr, SCSI_ERRSTR_SIZE,
				"Illegal value for busno, target or lun '%d,%d,%d'",
				busno, tgt, tlun);
		return (-1);
	}
#endif

	if ((device != NULL && *device != '\0') || (busno == -2 && tgt == -2)) {
		errno = EINVAL;
		if (scgp->errstr)
			js_snprintf(scgp->errstr, SCSI_ERRSTR_SIZE,
				"Open by 'devname' not supported on this OS");
		return (-1);
	}
	return (1);
}

EXPORT int
scsi_close(scgp)
	SCSI	*scgp;
{
	struct _fdmap_	*f;
	struct _fdmap_	*fnext;

	for (f = (struct _fdmap_ *)scgp->local; f; f=fnext) {
		scgp->local = 0;
		fnext = f->next;
		close(f->fd);
		free(f);
	}
	return (0);
}

LOCAL long
scsi_maxdma(scgp, amt)
	SCSI	*scgp;
	long	amt;
{
	return (256*1024);
}

EXPORT void *
scsi_getbuf(scgp, amt)
	SCSI	*scgp;
	long	amt;
{
	if (amt <= 0 || amt > scsi_bufsize(scgp, amt))
		return ((void *)0);
	if (scgp->debug)
		printf("scsi_getbuf: %ld bytes\n", amt);
	scgp->bufbase = malloc((size_t)(amt));
	return (scgp->bufbase);
}

EXPORT void
scsi_freebuf(scgp)
	SCSI	*scgp;
{
	if (scgp->bufbase)
		free(scgp->bufbase);
	scgp->bufbase = NULL;
}

EXPORT BOOL
scsi_havebus(scgp, busno)
	SCSI	*scgp;
	int	busno;
{
	struct stat	sb;
	char		buf[128];

	if (busno < 8)
		sprintf(buf, "/dev/bus/scsi/%d", busno);
	else
		sprintf(buf, "/dev/disk/ide/atapi/%d", busno-8);
	if (stat(buf, &sb))
		return (FALSE);
	return (TRUE);
}

EXPORT int
scsi_fileno(scgp, busno, tgt, tlun)
	SCSI	*scgp;
	int	busno;
	int	tgt;
	int	tlun;
{
	struct _fdmap_	*f;
	char		buf[128];
	int		fd;

	for (f = (struct _fdmap_ *)scgp->local; f; f=f->next) {
		if (f->bus == busno && f->targ == tgt && f->lun == tlun)
			return (f->fd);
	}
	if (busno < 8) {
		sprintf(buf, "/dev/bus/scsi/%d/%d/%d/raw",
					busno, tgt, tlun);
	} else {
		char *tgtstr = (tgt == 0) ? "master" : (tgt == 1) ? "slave" : "dummy";
		sprintf(buf, "/dev/disk/ide/atapi/%d/%s/%d/raw",
					busno-8, tgtstr, tlun);
	}
	fd = open(buf, 0);

	if (fd >=0 ) {
		f = (struct _fdmap_ *) malloc(sizeof(struct _fdmap_));
		f->bus = busno;
		f->targ = tgt;
		f->lun = tlun;
		f->fd = fd;
		f->next = (struct _fdmap_ *)scgp->local;
		scgp->local = f;
	}
	return (fd);
}

EXPORT int
scsi_initiator_id(scgp)
	SCSI	*scgp;
{
	return (-1);
}

EXPORT int
scsi_isatapi(scgp)
	SCSI	*scgp;
{
	/*
	 * XXX Should check for ATAPI
	 */
	return (-1);
}

EXPORT int
scsireset(scgp)
	SCSI	*scgp;
{
	return (-1);
}

LOCAL int
scsi_send(scgp, f, sp)
	SCSI		*scgp;
	int		f;
	struct scg_cmd	*sp;
{
	int			e;
	int 			scsi_error;
	int			cam_error;
	raw_device_command	rdc;

	if (f < 0) {
		sp->error = SCG_FATAL;
		return (0);
	}

	memcpy(rdc.command, &(sp->cdb), 12);
	rdc.command_length = sp->cdb_len;
	rdc.data = sp->addr;
	rdc.data_length = sp->size;
	rdc.sense_data_length = sp->sense_len;
	rdc.sense_data = sp->u_sense.cmd_sense;
	rdc.flags = sp->flags & SCG_RECV_DATA ? B_RAW_DEVICE_DATA_IN : 0;
	rdc.timeout = sp->timeout * 1000000;

	if (scgp->debug) {
		error("SEND(%d): cmd %02x, cdb = %d, data = %d, sense = %d\n",
			f, rdc.command[0], rdc.command_length,
			rdc.data_length, rdc.sense_data_length);
	}
	e = ioctl(f, B_RAW_DEVICE_COMMAND, &rdc, sizeof(rdc));
	sp->ux_errno = 0;
	if (!e) {
		cam_error = rdc.cam_status;
		scsi_error = rdc.scsi_status;
		if (scgp->debug)
			error("result: cam %02x scsi %02x\n", cam_error, scsi_error);
		sp->u_scb.cmd_scb[0] = scsi_error;

		switch (cam_error) {

		case CAM_REQ_CMP:
			sp->resid = 0;
			sp->error = SCG_NO_ERROR;
			break;
		case CAM_REQ_CMP_ERR:
			sp->sense_count = sp->sense_len; /* XXX */
			sp->error = SCG_RETRYABLE;
			break;
		default:
			sp->error = SCG_FATAL;
		}
	} else {
		sp->error = SCG_FATAL;
	}
	return (0);
}