84 lines
3.0 KiB
C
84 lines
3.0 KiB
C
/*-
|
|
* Parts Copyright (c) 1995 Terrence R. Lambert
|
|
* Copyright (c) 1995 Julian R. Elischer
|
|
* All rights reserved.
|
|
*
|
|
* 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 Terrence R. Lambert.
|
|
* 4. The name Terrence R. Lambert may not be used to endorse or promote
|
|
* products derived from this software without specific prior written
|
|
* permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY Julian R. Elischer ``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 TERRENCE R. LAMBERT 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.
|
|
*
|
|
* $Id: kern_conf.c,v 1.2 1995/10/02 10:15:40 julian Exp $
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/types.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/conf.h>
|
|
extern d_open_t lkmenodev;
|
|
|
|
/*
|
|
* (re)place an entry in the bdevsw or cdevsw table
|
|
* return the slot used in major(*descrip)
|
|
*/
|
|
#define ADDENTRY(TTYPE,NXXXDEV) \
|
|
int TTYPE##_add(dev_t *descrip, \
|
|
struct TTYPE *newentry, \
|
|
struct TTYPE *oldentry) \
|
|
{ \
|
|
int i ; \
|
|
if ( (int)*descrip == -1) { /* auto (0 is valid) */ \
|
|
/* \
|
|
* Search the table looking for a slot... \
|
|
*/ \
|
|
for (i = 0; i < NXXXDEV; i++) \
|
|
if (TTYPE[i].d_open == lkmenodev) \
|
|
break; /* found it! */ \
|
|
/* out of allocable slots? */ \
|
|
if (i == NXXXDEV) { \
|
|
return ENFILE; \
|
|
} \
|
|
} else { /* assign */ \
|
|
i = major(descrip); \
|
|
if (i < 0 || i >= NXXXDEV) { \
|
|
return EINVAL; \
|
|
} \
|
|
} \
|
|
\
|
|
/* maybe save old */ \
|
|
if (oldentry) { \
|
|
bcopy(&TTYPE[i], oldentry, sizeof(struct TTYPE)); \
|
|
} \
|
|
/* replace with new */ \
|
|
bcopy(newentry, &TTYPE[i], sizeof(struct TTYPE)); \
|
|
\
|
|
/* done! */ \
|
|
*descrip = makedev(i,0); \
|
|
return 0; \
|
|
} \
|
|
|
|
ADDENTRY(bdevsw, nblkdev)
|
|
ADDENTRY(cdevsw, nchrdev)
|