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NetBSD/sys/dev/mm.c

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don't enumerate individual minor number cases in mmioctl(), handle all as single 'default' case adresses part of port-arm/23581 by Richard Earnshaw
2003-12-20 19:22:14 +03:00
/* $NetBSD: mm.c,v 1.6 2003/12/20 16:22:14 jdolecek Exp $ */
Start of mi /dev/{mem,kmem,zero,null} driver. We add an ioctl entry, because we don't want to throw an error when FIONBIO is requested. We also allow FIOASYNC clear.
2002-02-27 04:16:14 +03:00
/*-
* Copyright (c) 2002 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Christos Zoulas.
*
* 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 NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
#include <sys/cdefs.h>
don't enumerate individual minor number cases in mmioctl(), handle all as single 'default' case adresses part of port-arm/23581 by Richard Earnshaw
2003-12-20 19:22:14 +03:00
__KERNEL_RCSID(0, "$NetBSD: mm.c,v 1.6 2003/12/20 16:22:14 jdolecek Exp $");
Start of mi /dev/{mem,kmem,zero,null} driver. We add an ioctl entry, because we don't want to throw an error when FIONBIO is requested. We also allow FIOASYNC clear.
2002-02-27 04:16:14 +03:00
/*
* Memory special file
*/
#include <sys/param.h>
#include <sys/conf.h>
#include <sys/buf.h>
#include <sys/systm.h>
#include <sys/uio.h>
#include <sys/malloc.h>
#include <sys/ioctl.h>
#include <sys/proc.h>
Merge the gehenna-devsw branch into the trunk. This merge changes the device switch tables from static array to dynamically generated by config(8). - All device switches is defined as a constant structure in device drivers. - The new grammer ``device-major'' is introduced to ``files''. device-major <prefix> char <num> [block <num>] [<rules>] - All device major numbers must be listed up in port dependent majors.<arch> by using this grammer. - Added the new naming convention. The name of the device switch must be <prefix>_[bc]devsw for auto-generation of device switch tables. - The backward compatibility of loading block/character device switch by LKM framework is broken. This is necessary to convert from block/character device major to device name in runtime and vice versa. - The restriction to assign device major by LKM is completely removed. We don't need to reserve LKM entries for dynamic loading of device switch. - In compile time, device major numbers list is packed into the kernel and the LKM framework will refer it to assign device major number dynamically.
2002-09-06 17:18:43 +04:00
dev_type_ioctl(mmioctl);
Start of mi /dev/{mem,kmem,zero,null} driver. We add an ioctl entry, because we don't want to throw an error when FIONBIO is requested. We also allow FIOASYNC clear.
2002-02-27 04:16:14 +03:00
int
Back out the lwp/ktrace changes. They contained a lot of colateral damage, and need to be examined and discussed more.
2003-06-30 02:28:00 +04:00
mmioctl(dev, cmd, data, flag, p)
Start of mi /dev/{mem,kmem,zero,null} driver. We add an ioctl entry, because we don't want to throw an error when FIONBIO is requested. We also allow FIOASYNC clear.
2002-02-27 04:16:14 +03:00
dev_t dev;
u_long cmd;
caddr_t data;
int flag;
Back out the lwp/ktrace changes. They contained a lot of colateral damage, and need to be examined and discussed more.
2003-06-30 02:28:00 +04:00
struct proc *p;
Start of mi /dev/{mem,kmem,zero,null} driver. We add an ioctl entry, because we don't want to throw an error when FIONBIO is requested. We also allow FIOASYNC clear.
2002-02-27 04:16:14 +03:00
{
switch (minor(dev)) {
don't enumerate individual minor number cases in mmioctl(), handle all as single 'default' case adresses part of port-arm/23581 by Richard Earnshaw
2003-12-20 19:22:14 +03:00
default:
Start of mi /dev/{mem,kmem,zero,null} driver. We add an ioctl entry, because we don't want to throw an error when FIONBIO is requested. We also allow FIOASYNC clear.
2002-02-27 04:16:14 +03:00
switch (cmd) {
case FIONBIO: /* We never block anyway */
return 0;
cleanup & uniform descriptor owner handling: * introduce fsetown(), fgetown(), fownsignal() - this sets/retrieves/signals the owner of descriptor, according to appropriate sematics of TIOCSPGRP/FIOSETOWN/SIOCSPGRP/TIOCGPGRP/FIOGETOWN/SIOCGPGRP ioctl; use these routines instead of custom code where appropriate * make every place handling TIOCSPGRP/TIOCGPGRP handle also FIOSETOWN/FIOGETOWN properly, and remove the translation of FIO[SG]OWN to TIOC[SG]PGRP in sys_ioctl() & sys_fcntl() * also remove the socket-specific hack in sys_ioctl()/sys_fcntl() and pass the ioctls down to soo_ioctl() as any other ioctl change discussed on tech-kern@
2003-09-21 23:16:48 +04:00
case FIOSETOWN:
case FIOGETOWN:
Start of mi /dev/{mem,kmem,zero,null} driver. We add an ioctl entry, because we don't want to throw an error when FIONBIO is requested. We also allow FIOASYNC clear.
2002-02-27 04:16:14 +03:00
case TIOCGPGRP:
case TIOCSPGRP:
return ENOTTY;
case FIOASYNC:
if ((*(int *)data) == 0)
return 0;
/*FALLTHROUGH*/
}
return EOPNOTSUPP;
}
}