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clockctl.c revision 1.19 
      1 /*      $NetBSD: clockctl.c,v 1.19 2006/10/12 01:30:50 christos 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 1.19 2006/10/12 01:30:50 christos 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 __unused)
     66 {
     67 	/* Nothing to set up before open is called */
     68 	return;
     69 }
     70 
     71 int
     72 clockctlioctl(
     73     dev_t dev __unused,
     74     u_long cmd,
     75     caddr_t data,
     76     int flags __unused,
     77     struct lwp *l)
     78 {
     79 	int error = 0;
     80 
     81 	switch (cmd) {
     82 		case CLOCKCTL_SETTIMEOFDAY: {
     83 			struct clockctl_settimeofday *args =
     84 			    (struct clockctl_settimeofday *)data;
     85 
     86 			error = settimeofday1(args->tv, args->tzp, l->l_proc);
     87 			if (error)
     88 				return (error);
     89 			break;
     90 		}
     91 		case CLOCKCTL_ADJTIME: {
     92 			struct clockctl_adjtime *args =
     93 			    (struct clockctl_adjtime *)data;
     94 
     95 			error = adjtime1(args->delta, args->olddelta,
     96 			    l->l_proc);
     97 			if (error)
     98 				return (error);
     99 			break;
    100 		}
    101 		case CLOCKCTL_CLOCK_SETTIME: {
    102 			struct clockctl_clock_settime *args =
    103 			    (struct clockctl_clock_settime *)data;
    104 
    105 			error = clock_settime1(l->l_proc, args->clock_id,
    106 			    args->tp);
    107 			if (error)
    108 				return (error);
    109 			break;
    110 		}
    111 #ifdef NTP
    112 		case CLOCKCTL_NTP_ADJTIME: {
    113 			struct clockctl_ntp_adjtime *args =
    114 			    (struct clockctl_ntp_adjtime *)data;
    115 			struct timex ntv;
    116 			register_t retval;
    117 
    118 			error = copyin(args->tp, &ntv, sizeof(ntv));
    119 			if (error)
    120 				return (error);
    121 
    122 			ntp_adjtime1(&ntv);
    123 
    124 			error = copyout(&ntv, args->tp, sizeof(ntv));
    125 			if (error == 0)
    126 				(void)copyout(&retval, &args->retval, sizeof(retval));
    127 
    128 			return (error);
    129 		}
    130 #endif /* NTP */
    131 		default:
    132 			error = EINVAL;
    133 	}
    134 
    135 	return (error);
    136 }
    137 
    138 
    139