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clockctl.c revision 1.23.14.1 
      1 /*      $NetBSD: clockctl.c,v 1.23.14.1 2008/04/05 23:33:20 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 1.23.14.1 2008/04/05 23:33:20 mjf Exp $");
     35 
     36 #include "opt_ntp.h"
     37 
     38 #include <sys/param.h>
     39 #include <sys/systm.h>
     40 #include <sys/proc.h>
     41 #include <sys/errno.h>
     42 #include <sys/ioctl.h>
     43 #include <sys/device.h>
     44 #include <sys/time.h>
     45 #include <sys/conf.h>
     46 #ifdef NTP
     47 #include <sys/timex.h>
     48 #endif /* NTP */
     49 
     50 #include <sys/clockctl.h>
     51 
     52 struct clockctl_softc {
     53 	struct device   clockctl_dev;
     54 };
     55 
     56 dev_type_ioctl(clockctlioctl);
     57 
     58 const struct cdevsw clockctl_cdevsw = {
     59 	nullopen, nullclose, noread, nowrite, clockctlioctl,
     60 	nostop, notty, nopoll, nommap, nokqfilter, D_OTHER,
     61 };
     62 
     63 /*ARGSUSED*/
     64 void
     65 clockctlattach(int num)
     66 {
     67 	int maj = cdevsw_lookup_major(&clockctl_cdevsw);
     68 
     69 	/* XXX: Would we ever require more than one clockctl? */
     70 	device_register_name(makedev(maj, 0), NULL, true,
     71 	    DEV_OTHER, "clockctl");
     72 
     73 	return;
     74 }
     75 
     76 int
     77 clockctlioctl(
     78     dev_t dev,
     79     u_long cmd,
     80     void *data,
     81     int flags,
     82     struct lwp *l)
     83 {
     84 	int error = 0;
     85 
     86 	switch (cmd) {
     87 		case CLOCKCTL_SETTIMEOFDAY: {
     88 			struct clockctl_settimeofday *args =
     89 			    (struct clockctl_settimeofday *)data;
     90 
     91 			error = settimeofday1(args->tv, true, args->tzp, l, false);
     92 			if (error)
     93 				return (error);
     94 			break;
     95 		}
     96 		case CLOCKCTL_ADJTIME: {
     97 			struct clockctl_adjtime *args =
     98 			    (struct clockctl_adjtime *)data;
     99 
    100 			error = adjtime1(args->delta, args->olddelta,
    101 			    l->l_proc);
    102 			if (error)
    103 				return (error);
    104 			break;
    105 		}
    106 		case CLOCKCTL_CLOCK_SETTIME: {
    107 			struct clockctl_clock_settime *args =
    108 			    (struct clockctl_clock_settime *)data;
    109 
    110 			error = clock_settime1(l->l_proc, args->clock_id,
    111 			    args->tp, false);
    112 			if (error)
    113 				return (error);
    114 			break;
    115 		}
    116 #ifdef NTP
    117 		case CLOCKCTL_NTP_ADJTIME: {
    118 			struct clockctl_ntp_adjtime *args =
    119 			    (struct clockctl_ntp_adjtime *)data;
    120 			struct timex ntv;
    121 			register_t retval;
    122 
    123 			error = copyin(args->tp, &ntv, sizeof(ntv));
    124 			if (error)
    125 				return (error);
    126 
    127 			ntp_adjtime1(&ntv);
    128 
    129 			error = copyout(&ntv, args->tp, sizeof(ntv));
    130 			if (error == 0)
    131 				(void)copyout(&retval, &args->retval, sizeof(retval));
    132 
    133 			return (error);
    134 		}
    135 #endif /* NTP */
    136 		default:
    137 			error = EINVAL;
    138 	}
    139 
    140 	return (error);
    141 }
    142 
    143 
    144