307 lines
6.8 KiB
C
307 lines
6.8 KiB
C
/* $NetBSD: freebsd_sched.c,v 1.19 2008/04/28 20:23:41 martin Exp $ */
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/*-
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* Copyright (c) 1999 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 Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
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* NASA Ames Research Center; by Matthias Scheler.
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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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*
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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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/*
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* FreeBSD compatibility module. Try to deal with scheduler related syscalls.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: freebsd_sched.c,v 1.19 2008/04/28 20:23:41 martin Exp $");
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#include <sys/param.h>
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#include <sys/mount.h>
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#include <sys/proc.h>
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#include <sys/systm.h>
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#include <sys/syscallargs.h>
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#include <sys/kauth.h>
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#include <sys/cpu.h>
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#include <compat/freebsd/freebsd_syscallargs.h>
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#include <compat/freebsd/freebsd_sched.h>
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int
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freebsd_sys_yield(struct lwp *l, const void *v, register_t *retval)
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{
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yield();
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return 0;
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}
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/*
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* XXX: Needs adjustment to do a proper conversion.
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*/
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static int
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sched_freebsd2native(int freebsd_policy,
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struct freebsd_sched_param *freebsd_params, int *native_policy,
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struct sched_param *native_params)
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{
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int error;
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error = 0;
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switch (freebsd_policy) {
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case FREEBSD_SCHED_OTHER:
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*native_policy = SCHED_OTHER;
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break;
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case FREEBSD_SCHED_FIFO:
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*native_policy = SCHED_FIFO;
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break;
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case FREEBSD_SCHED_RR:
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*native_policy = SCHED_RR;
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break;
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default:
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error = EINVAL;
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break;
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}
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if (freebsd_params != NULL && native_params != NULL && !error) {
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native_params = (struct sched_param *)freebsd_params;
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}
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return (error);
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}
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/*
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* XXX: Needs adjustment to do a proper conversion.
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*/
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static int
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sched_native2freebsd(int native_policy, struct sched_param *native_params,
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int *freebsd_policy, struct freebsd_sched_param *freebsd_params)
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{
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int error;
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error = 0;
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switch (native_policy) {
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case SCHED_OTHER:
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*freebsd_policy = FREEBSD_SCHED_OTHER;
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break;
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case SCHED_FIFO:
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*freebsd_policy = FREEBSD_SCHED_FIFO;
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break;
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case SCHED_RR:
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*freebsd_policy = FREEBSD_SCHED_RR;
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break;
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default:
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error = EINVAL;
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break;
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}
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if (native_params != NULL && freebsd_params != NULL && !error) {
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freebsd_params = (struct freebsd_sched_param *)native_params;
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}
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return (error);
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}
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int
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freebsd_sys_sched_setparam(struct lwp *l, const struct freebsd_sys_sched_setparam_args *uap, register_t *retval)
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{
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/* {
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syscallarg(pid_t) pid;
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syscallarg(const struct freebsd_sched_param *) sp;
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} */
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int error, policy;
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struct freebsd_sched_param lp;
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struct sched_param sp;
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if (SCARG(uap, pid) < 0 || SCARG(uap, sp) == NULL) {
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error = EINVAL;
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goto out;
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}
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error = copyin(SCARG(uap, sp), &lp, sizeof(lp));
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if (error)
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goto out;
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/* We need the current policy in FreeBSD terms. */
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error = do_sched_getparam(SCARG(uap, pid), 0, &policy, NULL);
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if (error)
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goto out;
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error = sched_native2freebsd(policy, NULL, &policy, NULL);
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if (error)
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goto out;
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error = sched_freebsd2native(policy, &lp, &policy, &sp);
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if (error)
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goto out;
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error = do_sched_setparam(SCARG(uap, pid), 0, policy, &sp);
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if (error)
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goto out;
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out:
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return error;
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}
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int
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freebsd_sys_sched_getparam(struct lwp *l, const struct freebsd_sys_sched_getparam_args *uap, register_t *retval)
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{
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/* {
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syscallarg(pid_t) pid;
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syscallarg(struct freebsd_sched_param *) sp;
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} */
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struct freebsd_sched_param lp;
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struct sched_param sp;
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int error;
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if (SCARG(uap, pid) < 0 || SCARG(uap, sp) == NULL) {
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error = EINVAL;
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goto out;
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}
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error = do_sched_getparam(SCARG(uap, pid), 0, NULL, &sp);
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if (error)
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goto out;
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error = sched_native2freebsd(0, &sp, NULL, &lp);
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if (error)
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goto out;
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error = copyout(&lp, SCARG(uap, sp), sizeof(lp));
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if (error)
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goto out;
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out:
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return (error);
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}
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int
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freebsd_sys_sched_setscheduler(struct lwp *l, const struct freebsd_sys_sched_setscheduler_args *uap, register_t *retval)
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{
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/* {
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syscallarg(pid_t) pid;
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syscallarg(int) policy;
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syscallarg(cont struct freebsd_sched_scheduler *) sp;
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} */
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int error, policy;
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struct freebsd_sched_param lp;
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struct sched_param sp;
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if (SCARG(uap, pid) < 0 || SCARG(uap, sp) == NULL) {
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error = EINVAL;
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goto out;
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}
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error = copyin(SCARG(uap, sp), &lp, sizeof(lp));
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if (error)
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goto out;
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error = sched_freebsd2native(SCARG(uap, policy), &lp, &policy, &sp);
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if (error)
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goto out;
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error = do_sched_setparam(SCARG(uap, pid), 0, policy, &sp);
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if (error)
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goto out;
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out:
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return error;
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}
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int
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freebsd_sys_sched_getscheduler(struct lwp *l, const struct freebsd_sys_sched_getscheduler_args *uap, register_t *retval)
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{
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/* {
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syscallarg(pid_t) pid;
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} */
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int error, policy;
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*retval = -1;
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error = do_sched_getparam(SCARG(uap, pid), 0, &policy, NULL);
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if (error)
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goto out;
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error = sched_native2freebsd(policy, NULL, &policy, NULL);
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if (error)
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goto out;
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*retval = policy;
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out:
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return error;
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}
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int
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freebsd_sys_sched_yield(struct lwp *l, const void *v, register_t *retval)
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{
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yield();
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return 0;
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}
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int
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freebsd_sys_sched_get_priority_max(struct lwp *l, const struct freebsd_sys_sched_get_priority_max_args *uap, register_t *retval)
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{
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/* {
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syscallarg(int) policy;
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} */
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/*
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* We can't emulate anything put the default scheduling policy.
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*/
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if (SCARG(uap, policy) != FREEBSD_SCHED_OTHER) {
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*retval = -1;
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return EINVAL;
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}
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*retval = 0;
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return 0;
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}
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int
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freebsd_sys_sched_get_priority_min(struct lwp *l, const struct freebsd_sys_sched_get_priority_min_args *uap, register_t *retval)
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{
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/* {
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syscallarg(int) policy;
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} */
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/*
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* We can't emulate anything put the default scheduling policy.
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*/
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if (SCARG(uap, policy) != FREEBSD_SCHED_OTHER) {
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*retval = -1;
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return EINVAL;
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}
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*retval = 0;
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return 0;
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}
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