mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-17 10:26:15 +00:00
7d613f6a39
Added CONTROL device that only does user-ioctl and nothing else; Added protection so user-ioctl requires write access; Clean up scsiconf.h a little. It needs more work.
121 lines
4.0 KiB
C
121 lines
4.0 KiB
C
/* "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; }
|