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/* "superscsi" pseudo device.
* "superscsi" supports general SCSI utilities that can iterate
* over all SCSI targets, including those without device entry
* points.
*
* "superscsi" supports the SCIOCADDR ioctl to change the BUS, ID, LUN
* of the target so that you can get to all devices. The only thing
* you can do to "superscsi" is open it, set the target, perform ioctl
* calls, and close it.
*
* Keep "superscsi" protected: you can drive a truck through the
* security hole if you don't.
*
*Begin copyright
*
* Copyright (C) 1993, 1994, 1995, HD Associates, Inc.
* PO Box 276
* Pepperell, MA 01463
* 508 433 5266
* dufault@hda.com
*
* This code is contributed to the University of California at Berkeley:
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*End copyright
* $Id: ssc.c,v 1.2 1995/01/08 15:56:09 dufault Exp $
*/
#include <sys/types.h>
#include <sys/conf.h>
#include <scsi/scsiconf.h>
#include <sys/scsiio.h>
#include <sys/errno.h>
#include <sys/stat.h>
#include <sys/param.h>
#include <sys/buf.h>
#include <sys/systm.h>
static dev_t sscdev = NODEV;
int sscopen(dev_t dev, int flag, int type, struct proc *p)
{
if (sscdev != NODEV)
return suopen(sscdev, flag, type, p);
return 0;
}
int sscclose(dev_t dev, int fflag, int type, struct proc *p)
{
if (sscdev != NODEV)
return suclose(sscdev, fflag, type, p);
return 0;
}
int sscioctl(dev_t dev, int cmd, caddr_t data, int fflag, struct proc *p)
{
if (cmd == SCIOCADDR)
{
struct scsi_addr *sca = (struct scsi_addr *) data;
dev_t newdev = SCSI_MKFIXED(sca->scbus,sca->target,sca->lun);
int ret;
if (sscdev != NODEV)
{
suclose(sscdev, fflag, S_IFCHR, p);
sscdev = NODEV;
}
if ( (ret = suopen(newdev, fflag, S_IFCHR, p)) )
return ret;
sscdev = newdev;
return 0;
}
if (sscdev != NODEV)
return suioctl(sscdev, cmd, data, fflag, p);
return ENXIO;
}
/* I've elected not to support any of these other entries. There
* really is no good reason other than I'm not sure how you would use
* them.
*/
int sscstrategy(struct buf *bp) { return ENXIO; }
int sscdump(dev_t dev) { return ENXIO; }
int sscpsize(dev_t dev) { return ENXIO; }
int sscread(dev_t dev, struct uio *uio, int ioflag) { return ENXIO; }
int sscwrite(dev_t dev, struct uio *uio, int ioflag) { return ENXIO; }
int sscselect(dev_t dev, int which, struct proc *p) { return ENXIO; }
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