NetBSD-5.0.2/sys/compat/freebsd/freebsd_sched.c
/* $NetBSD: freebsd_sched.c,v 1.19 2008/04/28 20:23:41 martin Exp $ */
/*-
* Copyright (c) 1999 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
* NASA Ames Research Center; by Matthias Scheler.
*
* 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.
*/
/*
* FreeBSD compatibility module. Try to deal with scheduler related syscalls.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: freebsd_sched.c,v 1.19 2008/04/28 20:23:41 martin Exp $");
#include <sys/param.h>
#include <sys/mount.h>
#include <sys/proc.h>
#include <sys/systm.h>
#include <sys/syscallargs.h>
#include <sys/kauth.h>
#include <sys/cpu.h>
#include <compat/freebsd/freebsd_syscallargs.h>
#include <compat/freebsd/freebsd_sched.h>
int
freebsd_sys_yield(struct lwp *l, const void *v, register_t *retval)
{
yield();
return 0;
}
/*
* XXX: Needs adjustment to do a proper conversion.
*/
static int
sched_freebsd2native(int freebsd_policy,
struct freebsd_sched_param *freebsd_params, int *native_policy,
struct sched_param *native_params)
{
int error;
error = 0;
switch (freebsd_policy) {
case FREEBSD_SCHED_OTHER:
*native_policy = SCHED_OTHER;
break;
case FREEBSD_SCHED_FIFO:
*native_policy = SCHED_FIFO;
break;
case FREEBSD_SCHED_RR:
*native_policy = SCHED_RR;
break;
default:
error = EINVAL;
break;
}
if (freebsd_params != NULL && native_params != NULL && !error) {
native_params = (struct sched_param *)freebsd_params;
}
return (error);
}
/*
* XXX: Needs adjustment to do a proper conversion.
*/
static int
sched_native2freebsd(int native_policy, struct sched_param *native_params,
int *freebsd_policy, struct freebsd_sched_param *freebsd_params)
{
int error;
error = 0;
switch (native_policy) {
case SCHED_OTHER:
*freebsd_policy = FREEBSD_SCHED_OTHER;
break;
case SCHED_FIFO:
*freebsd_policy = FREEBSD_SCHED_FIFO;
break;
case SCHED_RR:
*freebsd_policy = FREEBSD_SCHED_RR;
break;
default:
error = EINVAL;
break;
}
if (native_params != NULL && freebsd_params != NULL && !error) {
freebsd_params = (struct freebsd_sched_param *)native_params;
}
return (error);
}
int
freebsd_sys_sched_setparam(struct lwp *l, const struct freebsd_sys_sched_setparam_args *uap, register_t *retval)
{
/* {
syscallarg(pid_t) pid;
syscallarg(const struct freebsd_sched_param *) sp;
} */
int error, policy;
struct freebsd_sched_param lp;
struct sched_param sp;
if (SCARG(uap, pid) < 0 || SCARG(uap, sp) == NULL) {
error = EINVAL;
goto out;
}
error = copyin(SCARG(uap, sp), &lp, sizeof(lp));
if (error)
goto out;
/* We need the current policy in FreeBSD terms. */
error = do_sched_getparam(SCARG(uap, pid), 0, &policy, NULL);
if (error)
goto out;
error = sched_native2freebsd(policy, NULL, &policy, NULL);
if (error)
goto out;
error = sched_freebsd2native(policy, &lp, &policy, &sp);
if (error)
goto out;
error = do_sched_setparam(SCARG(uap, pid), 0, policy, &sp);
if (error)
goto out;
out:
return error;
}
int
freebsd_sys_sched_getparam(struct lwp *l, const struct freebsd_sys_sched_getparam_args *uap, register_t *retval)
{
/* {
syscallarg(pid_t) pid;
syscallarg(struct freebsd_sched_param *) sp;
} */
struct freebsd_sched_param lp;
struct sched_param sp;
int error;
if (SCARG(uap, pid) < 0 || SCARG(uap, sp) == NULL) {
error = EINVAL;
goto out;
}
error = do_sched_getparam(SCARG(uap, pid), 0, NULL, &sp);
if (error)
goto out;
error = sched_native2freebsd(0, &sp, NULL, &lp);
if (error)
goto out;
error = copyout(&lp, SCARG(uap, sp), sizeof(lp));
if (error)
goto out;
out:
return (error);
}
int
freebsd_sys_sched_setscheduler(struct lwp *l, const struct freebsd_sys_sched_setscheduler_args *uap, register_t *retval)
{
/* {
syscallarg(pid_t) pid;
syscallarg(int) policy;
syscallarg(cont struct freebsd_sched_scheduler *) sp;
} */
int error, policy;
struct freebsd_sched_param lp;
struct sched_param sp;
if (SCARG(uap, pid) < 0 || SCARG(uap, sp) == NULL) {
error = EINVAL;
goto out;
}
error = copyin(SCARG(uap, sp), &lp, sizeof(lp));
if (error)
goto out;
error = sched_freebsd2native(SCARG(uap, policy), &lp, &policy, &sp);
if (error)
goto out;
error = do_sched_setparam(SCARG(uap, pid), 0, policy, &sp);
if (error)
goto out;
out:
return error;
}
int
freebsd_sys_sched_getscheduler(struct lwp *l, const struct freebsd_sys_sched_getscheduler_args *uap, register_t *retval)
{
/* {
syscallarg(pid_t) pid;
} */
int error, policy;
*retval = -1;
error = do_sched_getparam(SCARG(uap, pid), 0, &policy, NULL);
if (error)
goto out;
error = sched_native2freebsd(policy, NULL, &policy, NULL);
if (error)
goto out;
*retval = policy;
out:
return error;
}
int
freebsd_sys_sched_yield(struct lwp *l, const void *v, register_t *retval)
{
yield();
return 0;
}
int
freebsd_sys_sched_get_priority_max(struct lwp *l, const struct freebsd_sys_sched_get_priority_max_args *uap, register_t *retval)
{
/* {
syscallarg(int) policy;
} */
/*
* We can't emulate anything put the default scheduling policy.
*/
if (SCARG(uap, policy) != FREEBSD_SCHED_OTHER) {
*retval = -1;
return EINVAL;
}
*retval = 0;
return 0;
}
int
freebsd_sys_sched_get_priority_min(struct lwp *l, const struct freebsd_sys_sched_get_priority_min_args *uap, register_t *retval)
{
/* {
syscallarg(int) policy;
} */
/*
* We can't emulate anything put the default scheduling policy.
*/
if (SCARG(uap, policy) != FREEBSD_SCHED_OTHER) {
*retval = -1;
return EINVAL;
}
*retval = 0;
return 0;
}