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clockctl.c revision 1.24 
      1 /*      $NetBSD: clockctl.c,v 1.24 2009/01/11 02:45:50 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 1.24 2009/01/11 02:45:50 christos 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 	/* Nothing to set up before open is called */
     72 	return;
     73 }
     74 
     75 int
     76 clockctlioctl(
     77     dev_t dev,
     78     u_long cmd,
     79     void *data,
     80     int flags,
     81     struct lwp *l)
     82 {
     83 	int error = 0;
     84 
     85 	switch (cmd) {
     86 	case CLOCKCTL_SETTIMEOFDAY: {
     87 		struct clockctl_settimeofday *args = data;
     88 
     89 		error = settimeofday1(args->tv, true, args->tzp, l, false);
     90 		break;
     91 	}
     92 	case CLOCKCTL_ADJTIME: {
     93 		struct timeval atv, oldatv;
     94 		struct clockctl_adjtime *args = data;
     95 
     96 		if (args->delta) {
     97 			error = copyin(args->delta, &atv, sizeof(*args->delta));
     98 			if (error)
     99 				return (error);
    100 		}
    101 		adjtime1(args->delta ? &atv : NULL,
    102 		    args->olddelta ? &oldatv : NULL, l->l_proc);
    103 		if (args->olddelta)
    104 			error = copyout(&oldatv, args->olddelta,
    105 			    sizeof(args->olddelta));
    106 		break;
    107 	}
    108 	case CLOCKCTL_CLOCK_SETTIME: {
    109 		struct clockctl_clock_settime *args = data;
    110 
    111 		error = clock_settime1(l->l_proc, args->clock_id,
    112 		    args->tp, false);
    113 		break;
    114 	}
    115 #ifdef NTP
    116 	case CLOCKCTL_NTP_ADJTIME: {
    117 		struct clockctl_ntp_adjtime *args = data;
    118 		struct timex ntv;
    119 		register_t retval;
    120 
    121 		error = copyin(args->tp, &ntv, sizeof(ntv));
    122 		if (error)
    123 			return (error);
    124 
    125 		ntp_adjtime1(&ntv);
    126 
    127 		error = copyout(&ntv, args->tp, sizeof(ntv));
    128 		if (error == 0)
    129 			error = copyout(&retval, &args->retval, sizeof(retval));
    130 	}
    131 #endif /* NTP */
    132 	default:
    133 #ifdef COMPAT_50
    134 		error = compat50_clockctlioctl(dev, cmd, data, flags, l);
    135 #else
    136 		error = EINVAL;
    137 #endif
    138 	}
    139 
    140 	return (error);
    141 }
    142 
    143 
    144