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kern_time_30.c revision 1.5.14.1 
      1 /*	$NetBSD: kern_time_30.c,v 1.5.14.1 2018/03/28 04:18:24 pgoyette 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  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 #include <sys/cdefs.h>
     39 __KERNEL_RCSID(0, "$NetBSD: kern_time_30.c,v 1.5.14.1 2018/03/28 04:18:24 pgoyette Exp $");
     40 
     41 #ifdef _KERNEL_OPT
     42 #include "opt_ntp.h"
     43 #endif
     44 
     45 #include <sys/param.h>
     46 #include <sys/systm.h>
     47 #include <sys/time.h>
     48 #include <sys/timex.h>
     49 #include <sys/syscall.h>
     50 #include <sys/syscallvar.h>
     51 #include <sys/syscallargs.h>
     52 #include <sys/compat_stub.h>
     53 
     54 #include <compat/common/compat_mod.h>
     55 #include <compat/common/compat_util.h>
     56 #include <compat/sys/time.h>
     57 #include <compat/sys/timex.h>
     58 
     59 static const struct syscall_package kern_time_30_syscalls[] = {
     60         { SYS_compat_30_ntp_gettime, 0,
     61 	    (sy_call_t *)compat_30_sys_ntp_gettime },
     62 	{ 0, 0, NULL }
     63 };
     64 
     65 int
     66 compat_30_sys_ntp_gettime(struct lwp *l,
     67     const struct compat_30_sys_ntp_gettime_args *uap, register_t *retval)
     68 {
     69 	/* {
     70 		syscallarg(struct ntptimeval30 *) ontvp;
     71 	} */
     72 	struct ntptimeval ntv;
     73 	struct ntptimeval30 ntv30;
     74 	struct timeval tv;
     75 	int error;
     76 
     77 	if (vec_ntp_gettime == NULL)
     78 		return ENOSYS;
     79 
     80 	if (SCARG(uap, ntvp)) {
     81 		(*vec_ntp_gettime)(&ntv);
     82 		TIMESPEC_TO_TIMEVAL(&tv, &ntv.time);
     83 		timeval_to_timeval50(&tv, &ntv30.time);
     84 		ntv30.maxerror = ntv.maxerror;
     85 		ntv30.esterror = ntv.esterror;
     86 
     87 		error = copyout(&ntv30, SCARG(uap, ntvp), sizeof(ntv30));
     88 		if (error)
     89 			return error;
     90  	}
     91 	*retval = (*vec_ntp_timestatus)();
     92 	return 0;
     93 }
     94 
     95 int
     96 kern_time_30_init(void)
     97 {
     98 
     99 	return syscall_establish(NULL, kern_time_30_syscalls);
    100 }
    101 
    102 int
    103 kern_time_30_fini(void)
    104 {
    105 
    106 	return syscall_disestablish(NULL, kern_time_30_syscalls);
    107 }
    108