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clockctl.c revision 1.23.14.2 
      1 /*      $NetBSD: clockctl.c,v 1.23.14.2 2009/01/17 13:28:52 mjf Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2001 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Emmanuel Dreyfus.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. The name of the author may not be used to endorse or promote products
     19  *    derived from this software without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     22  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     23  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     24  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     26  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     30  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     31  */
     32 
     33 #include <sys/cdefs.h>
     34 __KERNEL_RCSID(0, "$NetBSD: clockctl.c,v 1.23.14.2 2009/01/17 13:28:52 mjf Exp $");
     35 
     36 #include "opt_ntp.h"
     37 #include "opt_compat_netbsd.h"
     38 
     39 #include <sys/param.h>
     40 #include <sys/systm.h>
     41 #include <sys/proc.h>
     42 #include <sys/errno.h>
     43 #include <sys/ioctl.h>
     44 #include <sys/device.h>
     45 #include <sys/time.h>
     46 #include <sys/conf.h>
     47 #ifdef NTP
     48 #include <sys/timex.h>
     49 #endif /* NTP */
     50 
     51 #include <sys/clockctl.h>
     52 #ifdef COMPAT_50
     53 #include <compat/sys/clockctl.h>
     54 #endif
     55 
     56 struct clockctl_softc {
     57 	struct device   clockctl_dev;
     58 };
     59 
     60 dev_type_ioctl(clockctlioctl);
     61 
     62 const struct cdevsw clockctl_cdevsw = {
     63 	nullopen, nullclose, noread, nowrite, clockctlioctl,
     64 	nostop, notty, nopoll, nommap, nokqfilter, D_OTHER,
     65 };
     66 
     67 /*ARGSUSED*/
     68 void
     69 clockctlattach(int num)
     70 {
     71 	int maj = cdevsw_lookup_major(&clockctl_cdevsw);
     72 
     73 	/* XXX: Would we ever require more than one clockctl? */
     74 	device_register_name(makedev(maj, 0), NULL, true,
     75 	    DEV_OTHER, "clockctl");
     76 
     77 	return;
     78 }
     79 
     80 int
     81 clockctlioctl(
     82     dev_t dev,
     83     u_long cmd,
     84     void *data,
     85     int flags,
     86     struct lwp *l)
     87 {
     88 	int error = 0;
     89 
     90 	switch (cmd) {
     91 	case CLOCKCTL_SETTIMEOFDAY: {
     92 		struct clockctl_settimeofday *args = data;
     93 
     94 		error = settimeofday1(args->tv, true, args->tzp, l, false);
     95 		break;
     96 	}
     97 	case CLOCKCTL_ADJTIME: {
     98 		struct timeval atv, oldatv;
     99 		struct clockctl_adjtime *args = data;
    100 
    101 		if (args->delta) {
    102 			error = copyin(args->delta, &atv, sizeof(*args->delta));
    103 			if (error)
    104 				return (error);
    105 		}
    106 		adjtime1(args->delta ? &atv : NULL,
    107 		    args->olddelta ? &oldatv : NULL, l->l_proc);
    108 		if (args->olddelta)
    109 			error = copyout(&oldatv, args->olddelta,
    110 			    sizeof(args->olddelta));
    111 		break;
    112 	}
    113 	case CLOCKCTL_CLOCK_SETTIME: {
    114 		struct clockctl_clock_settime *args = data;
    115 
    116 		error = clock_settime1(l->l_proc, args->clock_id,
    117 		    args->tp, false);
    118 		break;
    119 	}
    120 #ifdef NTP
    121 	case CLOCKCTL_NTP_ADJTIME: {
    122 		struct clockctl_ntp_adjtime *args = data;
    123 		struct timex ntv;
    124 		register_t retval;
    125 
    126 		error = copyin(args->tp, &ntv, sizeof(ntv));
    127 		if (error)
    128 			return (error);
    129 
    130 		ntp_adjtime1(&ntv);
    131 
    132 		error = copyout(&ntv, args->tp, sizeof(ntv));
    133 		if (error == 0)
    134 			error = copyout(&retval, &args->retval, sizeof(retval));
    135 	}
    136 #endif /* NTP */
    137 	default:
    138 #ifdef COMPAT_50
    139 		error = compat50_clockctlioctl(dev, cmd, data, flags, l);
    140 #else
    141 		error = EINVAL;
    142 #endif
    143 	}
    144 
    145 	return (error);
    146 }
    147 
    148 
    149