302 lines
7.7 KiB
C
302 lines
7.7 KiB
C
/* $NetBSD: linux_time.c,v 1.18 2007/05/13 11:04:11 dsl Exp $ */
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/*-
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* Copyright (c) 2001 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Emmanuel Dreyfus.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: linux_time.c,v 1.18 2007/05/13 11:04:11 dsl Exp $");
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#include <sys/param.h>
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#include <sys/ucred.h>
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#include <sys/kauth.h>
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#include <sys/mount.h>
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#include <sys/signal.h>
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#include <sys/stdint.h>
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#include <sys/time.h>
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#include <sys/timetc.h>
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#include <sys/systm.h>
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#include <sys/syscallargs.h>
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#include <sys/lwp.h>
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#include <sys/proc.h>
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#include <compat/linux/common/linux_types.h>
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#include <compat/linux/common/linux_signal.h>
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#include <compat/linux/common/linux_machdep.h>
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#include <compat/linux/common/linux_sched.h>
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#include <compat/linux/linux_syscallargs.h>
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#include <compat/common/compat_util.h>
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static void native_to_linux_timespec(struct linux_timespec *,
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struct timespec *);
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static void linux_to_native_timespec(struct timespec *,
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struct linux_timespec *);
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static int linux_to_native_clockid(clockid_t *, clockid_t);
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/*
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* This is not implemented for alpha yet
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*/
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#if defined (__i386__) || defined (__m68k__) || \
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defined (__powerpc__) || defined (__mips__) || \
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defined(__arm__) || defined(__amd64__)
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/*
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* Linux keeps track of a system timezone in the kernel. It is readen
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* by gettimeofday and set by settimeofday. This emulates this behavior
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* See linux/kernel/time.c
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*/
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struct timezone linux_sys_tz;
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int
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linux_sys_gettimeofday(l, v, retval)
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struct lwp *l;
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void *v;
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register_t *retval;
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{
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struct linux_sys_gettimeofday_args /* {
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syscallarg(struct timeval *) tz;
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syscallarg(struct timezone *) tzp;
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} */ *uap = v;
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int error = 0;
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if (SCARG(uap, tp)) {
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error = sys_gettimeofday (l, v, retval);
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if (error)
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return (error);
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}
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if (SCARG(uap, tzp)) {
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error = copyout(&linux_sys_tz, SCARG(uap, tzp), sizeof(linux_sys_tz));
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if (error)
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return (error);
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}
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return (0);
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}
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int
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linux_sys_settimeofday(l, v, retval)
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struct lwp *l;
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void *v;
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register_t *retval;
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{
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struct linux_sys_settimeofday_args /* {
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syscallarg(struct timeval *) tp;
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syscallarg(struct timezone *) tzp;
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} */ *uap = v;
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int error = 0;
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if (SCARG(uap, tp)) {
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error = sys_settimeofday(l, v, retval);
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if (error)
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return (error);
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}
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/*
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* If user is not the superuser, we returned
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* after the sys_settimeofday() call.
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*/
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if (SCARG(uap, tzp)) {
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error = copyin(SCARG(uap, tzp), &linux_sys_tz, sizeof(linux_sys_tz));
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if (error)
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return (error);
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}
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return (0);
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}
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#endif /* __i386__ || __m68k__ || __powerpc__ || __mips__ || __arm__ */
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static void
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native_to_linux_timespec(struct linux_timespec *ltp, struct timespec *ntp)
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{
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ltp->tv_sec = ntp->tv_sec;
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ltp->tv_nsec = ntp->tv_nsec;
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}
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static void
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linux_to_native_timespec(struct timespec *ntp, struct linux_timespec *ltp)
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{
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ntp->tv_sec = ltp->tv_sec;
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ntp->tv_nsec = ltp->tv_nsec;
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}
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static int
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linux_to_native_clockid(clockid_t *n, clockid_t l)
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{
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switch (l) {
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case LINUX_CLOCK_REALTIME:
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*n = CLOCK_REALTIME;
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break;
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case LINUX_CLOCK_MONOTONIC:
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*n = CLOCK_MONOTONIC;
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break;
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case LINUX_CLOCK_PROCESS_CPUTIME_ID:
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case LINUX_CLOCK_THREAD_CPUTIME_ID:
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case LINUX_CLOCK_REALTIME_HR:
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case LINUX_CLOCK_MONOTONIC_HR:
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return EINVAL;
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}
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return 0;
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}
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int
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linux_sys_clock_gettime(l, v, retval)
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struct lwp *l;
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void *v;
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register_t *retval;
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{
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struct linux_sys_clock_gettime_args /* {
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syscallarg(clockid_t) which;
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syscallarg(struct linux_timespec *)tp;
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} */ *uap = v;
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struct timespec ts;
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struct linux_timespec lts;
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switch (SCARG(uap, which)) {
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case LINUX_CLOCK_REALTIME:
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nanotime(&ts);
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break;
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case LINUX_CLOCK_MONOTONIC:
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nanouptime(&ts);
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break;
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default:
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return EINVAL;
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}
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native_to_linux_timespec(<s, &ts);
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return copyout(<s, SCARG(uap, tp), sizeof lts);
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}
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int
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linux_sys_clock_settime(l, v, retval)
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struct lwp *l;
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void *v;
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register_t *retval;
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{
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struct linux_sys_clock_settime_args /* {
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syscallarg(clockid_t) which;
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syscallarg(struct linux_timespec *)tp;
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} */ *uap = v;
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struct timespec ts;
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struct linux_timespec lts;
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int error;
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switch (SCARG(uap, which)) {
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case LINUX_CLOCK_REALTIME:
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break;
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default:
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return EINVAL;
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}
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error = copyin(SCARG(uap, tp), <s, sizeof lts);
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if (error != 0)
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return error;
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linux_to_native_timespec(&ts, <s);
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error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_TIME,
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KAUTH_REQ_SYSTEM_TIME_SYSTEM, NULL, NULL, NULL);
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if (error != 0)
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return (error);
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return settime(l->l_proc, &ts);
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}
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int
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linux_sys_clock_getres(l, v, retval)
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struct lwp *l;
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void *v;
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register_t *retval;
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{
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struct linux_sys_clock_gettime_args /* {
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syscallarg(clockid_t) which;
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syscallarg(struct linux_timespec *)tp;
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} */ *uap = v;
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struct timespec ts;
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struct linux_timespec lts;
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int error;
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clockid_t nwhich = 0; /* XXX: GCC */
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error = linux_to_native_clockid(&nwhich, SCARG(uap, which));
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if (error != 0 || SCARG(uap, tp) == NULL)
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return error;
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ts.tv_sec = 0;
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ts.tv_nsec = 1000000000 / tc_getfrequency();
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native_to_linux_timespec(<s, &ts);
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return copyout(<s, SCARG(uap, tp), sizeof lts);
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}
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int
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linux_sys_clock_nanosleep(l, v, retval)
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struct lwp *l;
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void *v;
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register_t *retval;
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{
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struct linux_sys_clock_nanosleep_args /* {
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syscallarg(clockid_t) which;
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syscallarg(int) flags;
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syscallarg(struct linux_timespec) *rqtp;
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syscallarg(struct linux_timespec) *rmtp;
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} */ *uap = v;
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struct linux_timespec lrqts, lrmts;
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struct timespec rqts, rmts;
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int error, error1;
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if (SCARG(uap, flags) != 0)
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return EINVAL; /* XXX deal with TIMER_ABSTIME */
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if (SCARG(uap, which) != LINUX_CLOCK_REALTIME)
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return EINVAL;
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error = copyin(SCARG(uap, rqtp), &lrqts, sizeof lrqts);
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if (error != 0)
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return error;
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linux_to_native_timespec(&rqts, &lrqts);
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error = nanosleep1(l, &rqts, SCARG(uap, rmtp) ? &rmts : 0);
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if (SCARG(uap, rmtp) == NULL || (error != 0 && error != EINTR))
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return error;
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native_to_linux_timespec(&lrmts, &rmts);
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error1 = copyout(&lrmts, SCARG(uap, rmtp), sizeof lrmts);
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return error1 ? error1 : error;
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}
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