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tty_conf.c revision 1.42.2.6
      1  1.42.2.6     skrll /*	$NetBSD: tty_conf.c,v 1.42.2.6 2005/11/10 14:09:45 skrll Exp $	*/
      2      1.14       cgd 
      3      1.10       cgd /*-
      4      1.10       cgd  * Copyright (c) 1982, 1986, 1991, 1993
      5      1.10       cgd  *	The Regents of the University of California.  All rights reserved.
      6      1.10       cgd  * (c) UNIX System Laboratories, Inc.
      7      1.10       cgd  * All or some portions of this file are derived from material licensed
      8      1.10       cgd  * to the University of California by American Telephone and Telegraph
      9      1.10       cgd  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
     10      1.10       cgd  * the permission of UNIX System Laboratories, Inc.
     11      1.10       cgd  *
     12      1.10       cgd  * Redistribution and use in source and binary forms, with or without
     13      1.10       cgd  * modification, are permitted provided that the following conditions
     14      1.10       cgd  * are met:
     15      1.10       cgd  * 1. Redistributions of source code must retain the above copyright
     16      1.10       cgd  *    notice, this list of conditions and the following disclaimer.
     17      1.10       cgd  * 2. Redistributions in binary form must reproduce the above copyright
     18      1.10       cgd  *    notice, this list of conditions and the following disclaimer in the
     19      1.10       cgd  *    documentation and/or other materials provided with the distribution.
     20  1.42.2.2     skrll  * 3. Neither the name of the University nor the names of its contributors
     21      1.10       cgd  *    may be used to endorse or promote products derived from this software
     22      1.10       cgd  *    without specific prior written permission.
     23      1.10       cgd  *
     24      1.10       cgd  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     25      1.10       cgd  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     26      1.10       cgd  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     27      1.10       cgd  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     28      1.10       cgd  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     29      1.10       cgd  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     30      1.10       cgd  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     31      1.10       cgd  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     32      1.10       cgd  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     33      1.10       cgd  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     34      1.10       cgd  * SUCH DAMAGE.
     35      1.10       cgd  *
     36      1.20      fvdl  *	@(#)tty_conf.c	8.5 (Berkeley) 1/9/95
     37      1.10       cgd  */
     38      1.35     lukem 
     39      1.35     lukem #include <sys/cdefs.h>
     40  1.42.2.6     skrll __KERNEL_RCSID(0, "$NetBSD: tty_conf.c,v 1.42.2.6 2005/11/10 14:09:45 skrll Exp $");
     41      1.22   thorpej 
     42      1.22   thorpej #include "opt_compat_freebsd.h"
     43      1.24  christos #include "opt_compat_43.h"
     44      1.10       cgd 
     45      1.10       cgd #include <sys/param.h>
     46      1.10       cgd #include <sys/systm.h>
     47      1.10       cgd #include <sys/buf.h>
     48      1.10       cgd #include <sys/ioctl.h>
     49  1.42.2.6     skrll #include <sys/poll.h>
     50      1.10       cgd #include <sys/proc.h>
     51      1.10       cgd #include <sys/tty.h>
     52      1.28       eeh #include <sys/ioctl.h>
     53      1.28       eeh #include <sys/ttycom.h>
     54      1.10       cgd #include <sys/conf.h>
     55      1.28       eeh #include <sys/malloc.h>
     56      1.10       cgd 
     57      1.10       cgd #include "tb.h"
     58      1.10       cgd #if NTB > 0
     59  1.42.2.2     skrll int	tbopen(dev_t dev, struct tty *tp);
     60  1.42.2.2     skrll int	tbclose(struct tty *tp, int flags);
     61  1.42.2.2     skrll int	tbread(struct tty *tp, struct uio *uio, int flags);
     62  1.42.2.2     skrll int	tbtioctl(struct tty *tp, u_long cmd, caddr_t data,
     63  1.42.2.5     skrll 		 int flag, struct lwp *l);
     64  1.42.2.2     skrll int	tbinput(int c, struct tty *tp);
     65      1.10       cgd #endif
     66      1.10       cgd 
     67      1.10       cgd #include "sl.h"
     68      1.10       cgd #if NSL > 0
     69  1.42.2.2     skrll int	slopen(dev_t dev, struct tty *tp);
     70  1.42.2.2     skrll int	slclose(struct tty *tp, int flags);
     71  1.42.2.2     skrll int	sltioctl(struct tty *tp, u_long cmd, caddr_t data,
     72  1.42.2.5     skrll 		 int flag, struct lwp *l);
     73  1.42.2.2     skrll int	slinput(int c, struct tty *tp);
     74  1.42.2.2     skrll int	slstart(struct tty *tp);
     75      1.10       cgd #endif
     76      1.10       cgd 
     77      1.10       cgd #include "ppp.h"
     78      1.10       cgd #if NPPP > 0
     79  1.42.2.2     skrll int	pppopen(dev_t dev, struct tty *tp);
     80  1.42.2.2     skrll int	pppclose(struct tty *tp, int flags);
     81  1.42.2.2     skrll int	ppptioctl(struct tty *tp, u_long cmd, caddr_t data,
     82  1.42.2.5     skrll 		  int flag, struct lwp *l);
     83  1.42.2.2     skrll int	pppinput(int c, struct tty *tp);
     84  1.42.2.2     skrll int	pppstart(struct tty *tp);
     85  1.42.2.2     skrll int	pppread(struct tty *tp, struct uio *uio, int flag);
     86  1.42.2.2     skrll int	pppwrite(struct tty *tp, struct uio *uio, int flag);
     87      1.10       cgd #endif
     88      1.10       cgd 
     89      1.18  jonathan #include "strip.h"
     90      1.18  jonathan #if NSTRIP > 0
     91  1.42.2.2     skrll int	stripopen(dev_t dev, struct tty *tp);
     92  1.42.2.2     skrll int	stripclose(struct tty *tp, int flags);
     93  1.42.2.2     skrll int	striptioctl(struct tty *tp, u_long cmd, caddr_t data,
     94  1.42.2.5     skrll 		    int flag, struct lwp *l);
     95  1.42.2.2     skrll int	stripinput(int c, struct tty *tp);
     96  1.42.2.2     skrll int	stripstart(struct tty *tp);
     97      1.18  jonathan #endif
     98      1.18  jonathan 
     99      1.36  augustss #include "irframetty.h"
    100      1.36  augustss #if NIRFRAMETTY > 0
    101  1.42.2.2     skrll int	irframetopen(dev_t dev, struct tty *tp);
    102  1.42.2.2     skrll int	irframetclose(struct tty *tp, int flags);
    103  1.42.2.2     skrll int	irframetioctl(struct tty *tp, u_long cmd, caddr_t data,
    104  1.42.2.5     skrll 		      int flag, struct lwp *l);
    105  1.42.2.2     skrll int	irframetinput(int c, struct tty *tp);
    106  1.42.2.2     skrll int	irframetstart(struct tty *tp);
    107  1.42.2.2     skrll int	irframetread(struct tty *tp, struct uio *uio, int flag);
    108  1.42.2.2     skrll int	irframetwrite(struct tty *tp, struct uio *uio, int flag);
    109  1.42.2.5     skrll int	irframetpoll(struct tty *tp, int events, struct lwp *l);
    110      1.36  augustss #endif
    111      1.36  augustss 
    112      1.10       cgd 
    113      1.28       eeh struct  linesw termios_disc =
    114      1.39   gehenna 	{ "termios", TTYDISC, ttylopen, ttylclose, ttread, ttwrite,
    115      1.39   gehenna 	  ttynullioctl, ttyinput, ttstart, ttymodem, ttpoll };	/* 0- termios */
    116      1.28       eeh struct  linesw defunct_disc =
    117      1.39   gehenna 	{ "defunct", 1, ttynodisc, ttyerrclose, ttyerrio, ttyerrio,
    118      1.39   gehenna 	  ttynullioctl, ttyerrinput, ttyerrstart, nullmodem, ttyerrpoll }; /* 1- defunct */
    119      1.16   mycroft #if defined(COMPAT_43) || defined(COMPAT_FREEBSD)
    120      1.28       eeh struct  linesw ntty_disc =
    121      1.39   gehenna 	{ "ntty", 2, ttylopen, ttylclose, ttread, ttwrite, ttynullioctl,
    122      1.32       scw 	  ttyinput, ttstart, ttymodem, ttpoll };	/* 2- old NTTYDISC */
    123      1.12   mycroft #endif
    124      1.10       cgd #if NTB > 0
    125      1.28       eeh struct  linesw table_disc =
    126      1.36  augustss 	{ "tablet", TABLDISC, tbopen, tbclose, tbread, ttyerrio, tbtioctl,
    127      1.32       scw 	  tbinput, ttstart, nullmodem, ttyerrpoll };	/* 3- TABLDISC */
    128      1.10       cgd #endif
    129      1.10       cgd #if NSL > 0
    130      1.28       eeh struct  linesw slip_disc =
    131      1.36  augustss 	{ "slip", SLIPDISC, slopen, slclose, ttyerrio, ttyerrio, sltioctl,
    132      1.32       scw 	  slinput, slstart, nullmodem, ttyerrpoll };	/* 4- SLIPDISC */
    133      1.10       cgd #endif
    134      1.10       cgd #if NPPP > 0
    135      1.28       eeh struct  linesw ppp_disc =
    136      1.36  augustss 	{ "ppp", PPPDISC, pppopen, pppclose, pppread, pppwrite, ppptioctl,
    137      1.32       scw 	  pppinput, pppstart, ttymodem, ttpoll };	/* 5- PPPDISC */
    138      1.18  jonathan #endif
    139      1.18  jonathan #if NSTRIP > 0
    140      1.28       eeh struct  linesw strip_disc =
    141      1.36  augustss 	{ "strip", STRIPDISC, stripopen, stripclose, ttyerrio, ttyerrio,
    142      1.36  augustss 	  striptioctl, stripinput, stripstart, nullmodem, ttyerrpoll };
    143      1.36  augustss 							/* 6- STRIPDISC */
    144      1.36  augustss #endif
    145      1.36  augustss #if NIRFRAMETTY > 0
    146      1.36  augustss struct  linesw irframet_disc =
    147  1.42.2.6     skrll 	{ "irframe", -1, irframetopen, irframetclose, ttyerrio,
    148      1.36  augustss 	  ttyerrio, irframetioctl, irframetinput, irframetstart,
    149  1.42.2.6     skrll 	  ttymodem, ttyerrpoll };			/* irframe */
    150      1.25       eeh #endif
    151      1.25       eeh 
    152      1.25       eeh /*
    153      1.28       eeh  * Registered line disciplines.  Don't use this
    154      1.28       eeh  * it will go away.
    155      1.25       eeh  */
    156      1.28       eeh #define LSWITCHBRK	20
    157      1.28       eeh struct	linesw **linesw = NULL;
    158      1.28       eeh int	nlinesw = 0;
    159      1.28       eeh int	slinesw = 0;
    160      1.10       cgd 
    161      1.10       cgd /*
    162      1.10       cgd  * Do nothing specific version of line
    163      1.10       cgd  * discipline specific ioctl command.
    164      1.10       cgd  */
    165      1.10       cgd /*ARGSUSED*/
    166      1.17  christos int
    167  1.42.2.5     skrll ttynullioctl(tp, cmd, data, flags, l)
    168      1.10       cgd 	struct tty *tp;
    169      1.15       cgd 	u_long cmd;
    170      1.10       cgd 	char *data;
    171      1.10       cgd 	int flags;
    172  1.42.2.5     skrll 	struct lwp *l;
    173      1.10       cgd {
    174      1.10       cgd 
    175      1.10       cgd #ifdef lint
    176  1.42.2.5     skrll 	tp = tp; data = data; flags = flags; l = l;
    177      1.10       cgd #endif
    178      1.38    atatat 	return (EPASSTHROUGH);
    179      1.28       eeh }
    180      1.28       eeh 
    181      1.28       eeh /*
    182  1.42.2.6     skrll  * Return error to line discipline
    183  1.42.2.6     skrll  * specific poll call.
    184  1.42.2.6     skrll  */
    185  1.42.2.6     skrll /*ARGSUSED*/
    186  1.42.2.6     skrll int
    187  1.42.2.6     skrll ttyerrpoll(tp, events, l)
    188  1.42.2.6     skrll 	struct tty *tp;
    189  1.42.2.6     skrll 	int events;
    190  1.42.2.6     skrll 	struct lwp *l;
    191  1.42.2.6     skrll {
    192  1.42.2.6     skrll 
    193  1.42.2.6     skrll #ifdef lint
    194  1.42.2.6     skrll 	tp = tp; events = events; l = l;
    195  1.42.2.6     skrll #endif
    196  1.42.2.6     skrll 	return (POLLERR);
    197  1.42.2.6     skrll }
    198  1.42.2.6     skrll 
    199  1.42.2.6     skrll /*
    200      1.28       eeh  * Register a line discipline, optionally providing a
    201      1.28       eeh  * specific discipline number for compatibility, -1 allocates
    202      1.28       eeh  * a new one.  Returns a discipline number, or -1 on
    203      1.28       eeh  * failure.
    204      1.28       eeh  */
    205      1.28       eeh int
    206  1.42.2.2     skrll ttyldisc_add(disc, no)
    207      1.28       eeh 	struct linesw *disc;
    208      1.28       eeh 	int no;
    209      1.28       eeh {
    210      1.28       eeh 
    211      1.28       eeh 	/* You are not allowed to exceed TTLINEDNAMELEN */
    212      1.37  christos 	if (strlen(disc->l_name) >= TTLINEDNAMELEN)
    213      1.28       eeh 		return (-1);
    214      1.28       eeh 
    215  1.42.2.2     skrll 	/*
    216  1.42.2.2     skrll 	 * You are not allowed to specify a line switch
    217      1.28       eeh 	 * compatibility number greater than 10.
    218      1.28       eeh 	 */
    219  1.42.2.2     skrll 	if (no > 10)
    220      1.28       eeh 		return (-1);
    221      1.28       eeh 
    222      1.28       eeh 	if (linesw == NULL)
    223      1.28       eeh 		panic("adding uninitialized linesw");
    224      1.32       scw 
    225      1.32       scw #ifdef DEBUG
    226      1.32       scw 	/*
    227      1.32       scw 	 * XXX: For the benefit of LKMs
    228      1.32       scw 	 */
    229      1.32       scw 	if (disc->l_poll == NULL)
    230      1.32       scw 		panic("line discipline must now provide l_poll() entry point");
    231      1.32       scw #endif
    232      1.28       eeh 
    233      1.28       eeh 	if (no == -1) {
    234      1.28       eeh 		/* Hunt for any slot */
    235      1.28       eeh 
    236      1.29     enami 		for (no = slinesw; no-- > 0;)
    237      1.29     enami 			if (linesw[no] == NULL)
    238      1.29     enami 				break;
    239      1.30     enami 		/* if no == -1 we should realloc linesw, but for now... */
    240      1.30     enami 		if (no == -1)
    241      1.30     enami 			return (-1);
    242      1.28       eeh 	}
    243      1.28       eeh 
    244      1.28       eeh 	/* Need a specific slot */
    245      1.28       eeh 	if (linesw[no] != NULL)
    246      1.28       eeh 		return (-1);
    247  1.42.2.2     skrll 
    248      1.28       eeh 	linesw[no] = disc;
    249      1.28       eeh 	disc->l_no = no;
    250      1.28       eeh 
    251      1.28       eeh 	/* Define size of table */
    252      1.28       eeh 	if (no >= nlinesw)
    253      1.28       eeh 		nlinesw = no + 1;
    254  1.42.2.2     skrll 
    255      1.28       eeh 	return (no);
    256      1.28       eeh }
    257      1.28       eeh 
    258      1.28       eeh /*
    259      1.28       eeh  * Remove a line discipline by its name.  Returns the
    260      1.28       eeh  * discipline on success or NULL on failure.
    261      1.28       eeh  */
    262      1.28       eeh struct linesw *
    263  1.42.2.2     skrll ttyldisc_remove(name)
    264  1.42.2.6     skrll 	const char *name;
    265      1.28       eeh {
    266      1.28       eeh 	struct linesw *disc;
    267      1.28       eeh 	int i;
    268      1.28       eeh 
    269      1.28       eeh 	if (linesw == NULL)
    270      1.28       eeh 		panic("removing uninitialized linesw");
    271      1.28       eeh 
    272      1.29     enami 	for (i = 0; i < nlinesw; i++) {
    273      1.28       eeh 		if (linesw[i] && (strcmp(name, linesw[i]->l_name) == 0)) {
    274      1.28       eeh 			disc = linesw[i];
    275      1.28       eeh 			linesw[i] = NULL;
    276  1.42.2.2     skrll 
    277      1.28       eeh 			if (nlinesw == i + 1) {
    278      1.28       eeh 				/* Need to fix up array sizing */
    279      1.30     enami 				while (i-- > 0 && linesw[i] == NULL)
    280      1.30     enami 					continue;
    281      1.30     enami 				nlinesw = i + 1;
    282      1.28       eeh 			}
    283      1.28       eeh 			return (disc);
    284      1.28       eeh 		}
    285      1.28       eeh 	}
    286      1.28       eeh 	return (NULL);
    287      1.28       eeh }
    288      1.28       eeh 
    289      1.28       eeh /*
    290      1.28       eeh  * Look up a line discipline by its name.
    291      1.28       eeh  */
    292      1.28       eeh struct linesw *
    293      1.28       eeh ttyldisc_lookup(name)
    294  1.42.2.6     skrll 	const char *name;
    295      1.28       eeh {
    296      1.28       eeh 	int i;
    297      1.28       eeh 
    298      1.29     enami 	for (i = 0; i < nlinesw; i++)
    299      1.28       eeh 		if (linesw[i] && (strcmp(name, linesw[i]->l_name) == 0))
    300      1.28       eeh 			return (linesw[i]);
    301      1.28       eeh 	return (NULL);
    302      1.28       eeh }
    303      1.28       eeh 
    304      1.28       eeh #define TTYLDISCINIT(s, v) \
    305      1.28       eeh 	do { \
    306      1.28       eeh 		if (ttyldisc_add(&(s), (v)) != (v)) \
    307      1.33  kristerw 			panic("ttyldisc_init: " __STRING(s)); \
    308      1.40     perry 	} while (/*CONSTCOND*/ 0)
    309      1.28       eeh 
    310      1.28       eeh /*
    311      1.28       eeh  * Register the basic line disciplines.
    312  1.42.2.2     skrll  */
    313      1.28       eeh void
    314      1.29     enami ttyldisc_init()
    315      1.29     enami {
    316      1.29     enami 
    317      1.28       eeh 	/* Only initialize once */
    318      1.28       eeh 	if (linesw)
    319      1.28       eeh 		return;
    320      1.28       eeh 
    321      1.28       eeh 	slinesw = LSWITCHBRK;
    322  1.42.2.2     skrll 	linesw = malloc(slinesw * sizeof(struct linesw *),
    323      1.29     enami 	    M_TTYS, M_WAITOK);
    324      1.34   thorpej 	memset(linesw, 0, slinesw * sizeof(struct linesw *));
    325      1.28       eeh 
    326      1.28       eeh 	TTYLDISCINIT(termios_disc, 0);
    327      1.28       eeh 	/* Do we really need this one? */
    328      1.28       eeh 	TTYLDISCINIT(defunct_disc, 1);
    329      1.28       eeh 
    330  1.42.2.2     skrll 	/*
    331      1.28       eeh 	 * The following should really be moved to
    332      1.28       eeh 	 * initialization code for each module.
    333      1.28       eeh 	 */
    334      1.28       eeh 
    335      1.28       eeh #if defined(COMPAT_43) || defined(COMPAT_FREEBSD)
    336      1.28       eeh 	TTYLDISCINIT(ntty_disc, 2);
    337      1.28       eeh #endif
    338      1.28       eeh #if NTB > 0
    339      1.28       eeh 	TTYLDISCINIT(table_disc, 3);
    340      1.28       eeh #endif
    341      1.28       eeh #if NSL > 0
    342      1.28       eeh 	TTYLDISCINIT(slip_disc, 4);
    343      1.28       eeh #endif
    344      1.28       eeh #if NPPP > 0
    345      1.28       eeh 	TTYLDISCINIT(ppp_disc, 5);
    346      1.28       eeh #endif
    347      1.28       eeh #if NSTRIP > 0
    348      1.28       eeh 	TTYLDISCINIT(strip_disc, 6);
    349      1.36  augustss #endif
    350      1.36  augustss #if NIRFRAMETTY > 0
    351      1.36  augustss 	ttyldisc_add(&irframet_disc, -1);
    352      1.28       eeh #endif
    353      1.10       cgd }
    354