/* $NetBSD: linux_time.c,v 1.39.8.1 2022/08/03 11:11:32 martin Exp $ */ /*- * Copyright (c) 2001 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Emmanuel Dreyfus. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #include __KERNEL_RCSID(0, "$NetBSD: linux_time.c,v 1.39.8.1 2022/08/03 11:11:32 martin Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* * Linux keeps track of a system timezone in the kernel. It is readen * by gettimeofday and set by settimeofday. This emulates this behavior * See linux/kernel/time.c */ struct timezone linux_sys_tz; int linux_sys_gettimeofday(struct lwp *l, const struct linux_sys_gettimeofday_args *uap, register_t *retval) { /* { syscallarg(struct timeval50 *) tz; syscallarg(struct timezone *) tzp; } */ int error = 0; if (SCARG(uap, tp)) { error = compat_50_sys_gettimeofday(l, (const void *)uap, retval); if (error) return (error); } if (SCARG(uap, tzp)) { error = copyout(&linux_sys_tz, SCARG(uap, tzp), sizeof(linux_sys_tz)); if (error) return (error); } return (0); } int linux_sys_settimeofday(struct lwp *l, const struct linux_sys_settimeofday_args *uap, register_t *retval) { /* { syscallarg(struct timeval50 *) tp; syscallarg(struct timezone *) tzp; } */ int error = 0; if (SCARG(uap, tp)) { error = compat_50_sys_settimeofday(l, (const void *)uap, retval); if (error) return (error); } if (SCARG(uap, tzp)) { if (kauth_authorize_generic(kauth_cred_get(), KAUTH_GENERIC_ISSUSER, NULL) != 0) return (EPERM); error = copyin(SCARG(uap, tzp), &linux_sys_tz, sizeof(linux_sys_tz)); if (error) return (error); } return (0); } void native_to_linux_timespec(struct linux_timespec *ltp, struct timespec *ntp) { memset(ltp, 0, sizeof(*ltp)); ltp->tv_sec = ntp->tv_sec; ltp->tv_nsec = ntp->tv_nsec; } void linux_to_native_timespec(struct timespec *ntp, struct linux_timespec *ltp) { memset(ntp, 0, sizeof(*ntp)); ntp->tv_sec = ltp->tv_sec; ntp->tv_nsec = ltp->tv_nsec; } int linux_sys_nanosleep(struct lwp *l, const struct linux_sys_nanosleep_args *uap, register_t *retval) { /* { syscallarg(struct linux_timespec *) rqtp; syscallarg(struct linux_timespec *) rmtp; } */ struct timespec rqts, rmts; struct linux_timespec lrqts, lrmts; int error, error1; error = copyin(SCARG(uap, rqtp), &lrqts, sizeof(lrqts)); if (error != 0) return error; linux_to_native_timespec(&rqts, &lrqts); error = nanosleep1(l, CLOCK_MONOTONIC, 0, &rqts, SCARG(uap, rmtp) ? &rmts : NULL); if (SCARG(uap, rmtp) == NULL || (error != 0 && error != EINTR)) return error; native_to_linux_timespec(&lrmts, &rmts); error1 = copyout(&lrmts, SCARG(uap, rmtp), sizeof(lrmts)); return error1 ? error1 : error; } int linux_to_native_clockid(clockid_t *n, clockid_t l) { switch (l) { case LINUX_CLOCK_REALTIME: *n = CLOCK_REALTIME; break; case LINUX_CLOCK_MONOTONIC: *n = CLOCK_MONOTONIC; break; case LINUX_CLOCK_PROCESS_CPUTIME_ID: case LINUX_CLOCK_THREAD_CPUTIME_ID: case LINUX_CLOCK_REALTIME_HR: case LINUX_CLOCK_MONOTONIC_HR: default: return EINVAL; } return 0; } int linux_sys_clock_gettime(struct lwp *l, const struct linux_sys_clock_gettime_args *uap, register_t *retval) { /* { syscallarg(clockid_t) which; syscallarg(struct linux_timespec *)tp; } */ int error; clockid_t id; struct timespec ts; struct linux_timespec lts; error = linux_to_native_clockid(&id, SCARG(uap, which)); if (error != 0) return error; error = clock_gettime1(id, &ts); if (error != 0) return error; native_to_linux_timespec(<s, &ts); return copyout(<s, SCARG(uap, tp), sizeof lts); } int linux_sys_clock_settime(struct lwp *l, const struct linux_sys_clock_settime_args *uap, register_t *retval) { /* { syscallarg(clockid_t) which; syscallarg(struct linux_timespec *)tp; } */ struct timespec ts; struct linux_timespec lts; clockid_t id; int error; error = linux_to_native_clockid(&id, SCARG(uap, which)); if (error != 0) return error; error = copyin(SCARG(uap, tp), <s, sizeof lts); if (error != 0) return error; linux_to_native_timespec(&ts, <s); return clock_settime1(l->l_proc, id, &ts, true); } int linux_sys_clock_getres(struct lwp *l, const struct linux_sys_clock_getres_args *uap, register_t *retval) { /* { syscallarg(clockid_t) which; syscallarg(struct linux_timespec *)tp; } */ struct timespec ts; struct linux_timespec lts; int error; clockid_t nwhich = 0; /* XXX: GCC */ error = linux_to_native_clockid(&nwhich, SCARG(uap, which)); if (error != 0 || SCARG(uap, tp) == NULL) return error; error = clock_getres1(nwhich, &ts); if (error != 0) return error; native_to_linux_timespec(<s, &ts); return copyout(<s, SCARG(uap, tp), sizeof lts); } int linux_sys_clock_nanosleep(struct lwp *l, const struct linux_sys_clock_nanosleep_args *uap, register_t *retval) { /* { syscallarg(clockid_t) which; syscallarg(int) flags; syscallarg(struct linux_timespec) *rqtp; syscallarg(struct linux_timespec) *rmtp; } */ struct linux_timespec lrqts, lrmts; struct timespec rqts, rmts; int error, error1, flags; clockid_t nwhich; flags = SCARG(uap, flags) != 0 ? TIMER_ABSTIME : 0; error = linux_to_native_clockid(&nwhich, SCARG(uap, which)); if (error != 0) return error; error = copyin(SCARG(uap, rqtp), &lrqts, sizeof lrqts); if (error != 0) return error; linux_to_native_timespec(&rqts, &lrqts); error = nanosleep1(l, nwhich, flags, &rqts, SCARG(uap, rmtp) ? &rmts : NULL); if (SCARG(uap, rmtp) == NULL || (error != 0 && error != EINTR)) return error; native_to_linux_timespec(&lrmts, &rmts); error1 = copyout(&lrmts, SCARG(uap, rmtp), sizeof lrmts); return error1 ? error1 : error; }