conf.c

早期freebsd实现

/*
 * Copyright (c) 1992, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Kazumasa Utashiro of Software Research Associates, Inc.
 *
 * 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.
 *
 *	@(#)conf.c	8.2 (Berkeley) 11/14/93
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/buf.h>
#include <sys/ioctl.h>
#include <sys/proc.h>
#include <sys/vnode.h>
#include <sys/tty.h>
#include <sys/conf.h>

int	rawread		__P((dev_t, struct uio *, int));
int	rawwrite	__P((dev_t, struct uio *, int));
int	swstrategy	__P((struct buf *));
int	ttselect	__P((dev_t, int, struct proc *));

#define	dev_type_open(n)	int n __P((dev_t, int, int, struct proc *))
#define	dev_type_close(n)	int n __P((dev_t, int, int, struct proc *))
#define	dev_type_strategy(n)	int n __P((struct buf *))
#define	dev_type_ioctl(n) \
	int n __P((dev_t, int, caddr_t, int, struct proc *))

/* bdevsw-specific types */
#define	dev_type_dump(n)	int n __P((dev_t))
#define	dev_type_size(n)	int n __P((dev_t))

#define	dev_decl(n,t)	__CONCAT(dev_type_,t)(__CONCAT(n,t))
#define	dev_init(c,n,t) \
	(c > 0 ? __CONCAT(n,t) : (__CONCAT(dev_type_,t)((*))) enxio)

/* bdevsw-specific initializations */
#define	dev_size_init(c,n)	(c > 0 ? __CONCAT(n,size) : 0)

#define	bdev_decl(n) \
	dev_decl(n,open); dev_decl(n,close); dev_decl(n,strategy); \
	dev_decl(n,ioctl); dev_decl(n,dump); dev_decl(n,size)

#define	bdev_disk_init(c,n) { \
	dev_init(c,n,open), (dev_type_close((*))) nullop, \
	dev_init(c,n,strategy), dev_init(c,n,ioctl), \
	dev_init(c,n,dump), dev_size_init(c,n), 0 }

#define	bdev_tape_init(c,n) { \
	dev_init(c,n,open), dev_init(c,n,close), \
	dev_init(c,n,strategy), dev_init(c,n,ioctl), \
	dev_init(c,n,dump), 0, B_TAPE }

#define	bdev_swap_init() { \
	(dev_type_open((*))) enodev, (dev_type_close((*))) enodev, \
	swstrategy, (dev_type_ioctl((*))) enodev, \
	(dev_type_dump((*))) enodev, 0, 0 }

#define	bdev_notdef()	bdev_tape_init(0,no)
bdev_decl(no);	/* dummy declarations */

#include "sd.h"
#define sd_b_ioctl	sdioctl
#define sd_b_strategy	sdstrategy
#define sd_b_dump	sddump
#define sd_b_size	sdsize
bdev_decl(sd_b_);

#include "fd.h"
#define fd_b_ioctl	fdioctl
#define fd_b_strategy	fdstrategy
#define fd_b_dump	fddump
#define fd_b_size	fdsize
bdev_decl(fd_b_);

#include "vn.h"
bdev_decl(vn);

struct bdevsw	bdevsw[] =
{
	bdev_disk_init(NSD,sd_b_),  /* 0: SCSI disk */
	bdev_disk_init(NFD,fd_b_),  /* 1: floppy disk */
	bdev_notdef(),		    /* 2 */
	bdev_disk_init(NVN,vn),	    /* 3: vnode disk driver (swap to files) */
	bdev_swap_init(),	    /* 4: swap pseudo-device */
};

int	nblkdev = sizeof (bdevsw) / sizeof (bdevsw[0]);

/* cdevsw-specific types */
#define	dev_type_read(n)	int n __P((dev_t, struct uio *, int))
#define	dev_type_write(n)	int n __P((dev_t, struct uio *, int))
#define	dev_type_stop(n)	int n __P((struct tty *, int))
#define	dev_type_reset(n)	int n __P((int))
#define	dev_type_select(n)	int n __P((dev_t, int, struct proc *))
#define	dev_type_map(n)		int n __P(())

#define	cdev_decl(n) \
	dev_decl(n,open); dev_decl(n,close); dev_decl(n,read); \
	dev_decl(n,write); dev_decl(n,ioctl); dev_decl(n,stop); \
	dev_decl(n,reset); dev_decl(n,select); dev_decl(n,map); \
	dev_decl(n,strategy); extern struct tty __CONCAT(n,_tty)[]

#define	dev_tty_init(c,n)	(c > 0 ? __CONCAT(n,_tty) : 0)

/* open, read, write, ioctl, strategy */
#define	cdev_disk_init(c,n) { \
	dev_init(c,n,open), (dev_type_close((*))) nullop, dev_init(c,n,read), \
	dev_init(c,n,write), dev_init(c,n,ioctl), (dev_type_stop((*))) enodev, \
	(dev_type_reset((*))) nullop, 0, seltrue, (dev_type_map((*))) enodev, \
	dev_init(c,n,strategy) }

/* open, close, read, write, ioctl, strategy */
#define	cdev_tape_init(c,n) { \
	dev_init(c,n,open), dev_init(c,n,close), rawread, \
	rawwrite, dev_init(c,n,ioctl), (dev_type_stop((*))) enodev, \
	(dev_type_reset((*))) nullop, 0, seltrue, (dev_type_map((*))) enodev, \
	dev_init(c,n,strategy) }

/* open, close, read, write, ioctl, stop, tty */
#define	cdev_tty_init(c,n) { \
	dev_init(c,n,open), dev_init(c,n,close), dev_init(c,n,read), \
	dev_init(c,n,write), dev_init(c,n,ioctl), dev_init(c,n,stop), \
	(dev_type_reset((*))) nullop, dev_tty_init(c,n), ttselect, \
	(dev_type_map((*))) enodev, 0 }

#define	cdev_notdef() { \
	(dev_type_open((*))) enodev, (dev_type_close((*))) enodev, \
	(dev_type_read((*))) enodev, (dev_type_write((*))) enodev, \
	(dev_type_ioctl((*))) enodev, (dev_type_stop((*))) enodev, \
	(dev_type_reset((*))) nullop, 0, seltrue, \
	(dev_type_map((*))) enodev, 0 }

/* open, close, read, write, ioctl -- XXX should be tty */
#define	cdev_vc_init(c,n) { \
	dev_init(c,n,open), dev_init(c,n,close), dev_init(c,n,read), \
	dev_init(c,n,write), dev_init(c,n,ioctl), dev_init(c,n,stop), \
	(dev_type_reset((*))) nullop, 0, dev_init(c,n,select), \
	(dev_type_map((*))) enodev, 0 }

cdev_decl(no);			/* dummy declarations */

#include "rs.h"
cdev_decl(rs);
cdev_decl(vc);

#include "bm.h"
cdev_decl(cn);

cdev_decl(ctty);
/* open, read, write, ioctl, select -- XXX should be a tty */
#define	cdev_ctty_init(c,n) { \
	dev_init(c,n,open), (dev_type_close((*))) nullop, dev_init(c,n,read), \
	dev_init(c,n,write), dev_init(c,n,ioctl), (dev_type_stop((*))) nullop, \
	(dev_type_reset((*))) nullop, 0, dev_init(c,n,select), \
	(dev_type_map((*))) enodev, 0 }

dev_type_read(mmrw);
/* read/write */
#define	cdev_mm_init(c,n) { \
	(dev_type_open((*))) nullop, (dev_type_close((*))) nullop, mmrw, \
	mmrw, (dev_type_ioctl((*))) enodev, (dev_type_stop((*))) nullop, \
	(dev_type_reset((*))) nullop, 0, seltrue, (dev_type_map((*))) enodev, 0 }

#include "sd.h"
#define sd_c_read	sdread
#define sd_c_write	sdwrite
#define sd_c_ioctl	sdioctl
#define sd_c_reset	sdreset
#define sd_c_strategy	sdstrategy
#define sd_c_dump	sddump
#define sd_c_size	sdsize
cdev_decl(sd_c_);

#include "fd.h"
#define fd_c_read	fdread
#define fd_c_write	fdwrite
#define fd_c_ioctl	fdioctl
#define fd_c_reset	fdreset
#define fd_c_strategy	fdstrategy
#define fd_c_dump	fddump
#define fd_c_size	fdsize
cdev_decl(fd_c_);

#include "lp.h"
cdev_decl(lp);

/* read, write, strategy */
#define	cdev_swap_init(c,n) { \
	(dev_type_open((*))) nullop, (dev_type_close((*))) nullop, rawread, \
	rawwrite, (dev_type_ioctl((*))) enodev, (dev_type_stop((*))) enodev, \
	(dev_type_reset((*))) nullop, 0, (dev_type_select((*))) enodev, \
	(dev_type_map((*))) enodev, dev_init(c,n,strategy) }

#include "pty.h"
#define	pts_tty		pt_tty
#define	ptsioctl	ptyioctl
cdev_decl(pts);
#define	ptc_tty		pt_tty
#define	ptcioctl	ptyioctl
cdev_decl(ptc);

/* open, close, read, write, ioctl, tty, select */
#define	cdev_ptc_init(c,n) { \
	dev_init(c,n,open), dev_init(c,n,close), dev_init(c,n,read), \
	dev_init(c,n,write), dev_init(c,n,ioctl), (dev_type_stop((*))) nullop, \
	(dev_type_reset((*))) nullop, dev_tty_init(c,n), dev_init(c,n,select), \
	(dev_type_map((*))) enodev, 0 }

#include "kb.h"
cdev_decl(kb);
/* open, close, write, ioctl */
#define	cdev_kb_init(c,n) { \
	dev_init(c,n,open), dev_init(c,n,close), (dev_type_read((*))) enodev, \
	dev_init(c,n,write), dev_init(c,n,ioctl), \
	(dev_type_stop((*))) enodev, (dev_type_reset((*))) nullop, 0, \