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      1 /*	$NetBSD: kern_time_30.c,v 1.8 2019/12/15 16:48:26 tsutsui Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2008 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Christos Zoulas.
      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  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 #include <sys/cdefs.h>
     32 __KERNEL_RCSID(0, "$NetBSD: kern_time_30.c,v 1.8 2019/12/15 16:48:26 tsutsui Exp $");
     33 
     34 #ifdef _KERNEL_OPT
     35 #include "opt_compat_netbsd.h"
     36 #include "opt_ntp.h"
     37 #endif
     38 
     39 #include <sys/param.h>
     40 #include <sys/systm.h>
     41 #include <sys/time.h>
     42 #include <sys/timex.h>
     43 #include <sys/syscall.h>
     44 #include <sys/syscallvar.h>
     45 #include <sys/syscallargs.h>
     46 #include <sys/compat_stub.h>
     47 
     48 #include <compat/common/compat_mod.h>
     49 #include <compat/common/compat_util.h>
     50 #include <compat/sys/time.h>
     51 #include <compat/sys/timex.h>
     52 
     53 static const struct syscall_package kern_time_30_syscalls[] = {
     54         { SYS_compat_30_ntp_gettime, 0,
     55 	    (sy_call_t *)compat_30_sys_ntp_gettime },
     56 	{ 0, 0, NULL }
     57 };
     58 
     59 int
     60 compat_30_sys_ntp_gettime(struct lwp *l,
     61     const struct compat_30_sys_ntp_gettime_args *uap, register_t *retval)
     62 {
     63 	/* {
     64 		syscallarg(struct ntptimeval30 *) ontvp;
     65 	} */
     66 	struct ntptimeval ntv;
     67 	struct ntptimeval30 ntv30;
     68 	struct timeval tv;
     69 	int error;
     70 
     71 	if (vec_ntp_gettime == NULL)
     72 		return ENOSYS;
     73 
     74 	if (SCARG(uap, ntvp)) {
     75 		(*vec_ntp_gettime)(&ntv);
     76 		memset(&ntv30, 0, sizeof(ntv30));
     77 		TIMESPEC_TO_TIMEVAL(&tv, &ntv.time);
     78 		timeval_to_timeval50(&tv, &ntv30.time);
     79 		ntv30.maxerror = ntv.maxerror;
     80 		ntv30.esterror = ntv.esterror;
     81 
     82 		error = copyout(&ntv30, SCARG(uap, ntvp), sizeof(ntv30));
     83 		if (error)
     84 			return error;
     85  	}
     86 	*retval = (*vec_ntp_timestatus)();
     87 	return 0;
     88 }
     89 
     90 int
     91 kern_time_30_init(void)
     92 {
     93 
     94 	return syscall_establish(NULL, kern_time_30_syscalls);
     95 }
     96 
     97 int
     98 kern_time_30_fini(void)
     99 {
    100 
    101 	return syscall_disestablish(NULL, kern_time_30_syscalls);
    102 }
    103