f780a2b2ea
sched_setparam()
sched_getparam()
sched_setscheduler()
sched_getscheduler()
sched_yield()
sched_get_priority_max()
sched_get_priority_min()
sched_rr_get_interval()
322 lines
6.9 KiB
C
322 lines
6.9 KiB
C
/*
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* Copyright (c) 1996, 1997, 1998
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* HD Associates, Inc. All rights reserved.
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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 HD Associates, Inc
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* 4. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY HD ASSOCIATES AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL HD ASSOCIATES OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/* p1003_1b: Real Time common code.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/module.h>
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#include <sys/mutex.h>
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#include <sys/proc.h>
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#include <sys/sysctl.h>
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#include <sys/sysent.h>
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#include <sys/syslog.h>
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#include <sys/sysproto.h>
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#include <posix4/posix4.h>
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MALLOC_DEFINE(M_P31B, "p1003.1b", "Posix 1003.1B");
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/* The system calls return ENOSYS if an entry is called that is
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* not run-time supported. I am also logging since some programs
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* start to use this when they shouldn't. That will be removed if annoying.
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*/
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int
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syscall_not_present(struct proc *p, const char *s, struct nosys_args *uap)
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{
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log(LOG_ERR, "cmd %s pid %d tried to use non-present %s\n",
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p->p_comm, p->p_pid, s);
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/* a " return nosys(p, uap); " here causes a core dump.
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*/
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return ENOSYS;
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}
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#if !defined(_KPOSIX_PRIORITY_SCHEDULING)
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/* Not configured but loadable via a module:
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*/
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static int sched_attach(void)
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{
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return 0;
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}
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SYSCALL_NOT_PRESENT_GEN(sched_setparam)
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SYSCALL_NOT_PRESENT_GEN(sched_getparam)
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SYSCALL_NOT_PRESENT_GEN(sched_setscheduler)
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SYSCALL_NOT_PRESENT_GEN(sched_getscheduler)
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SYSCALL_NOT_PRESENT_GEN(sched_yield)
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SYSCALL_NOT_PRESENT_GEN(sched_get_priority_max)
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SYSCALL_NOT_PRESENT_GEN(sched_get_priority_min)
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SYSCALL_NOT_PRESENT_GEN(sched_rr_get_interval)
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#else
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/* Configured in kernel version:
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*/
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static struct ksched *ksched;
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static int sched_attach(void)
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{
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int ret = ksched_attach(&ksched);
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if (ret == 0)
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p31b_setcfg(CTL_P1003_1B_PRIORITY_SCHEDULING, 1);
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return ret;
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}
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/*
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* MPSAFE
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*/
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int sched_setparam(struct proc *p,
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struct sched_setparam_args *uap)
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{
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struct proc *targetp;
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int e;
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struct sched_param sched_param;
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e = copyin(uap->param, &sched_param, sizeof(sched_param));
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if (e)
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return (e);
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mtx_lock(&Giant);
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if (uap->pid == 0) {
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targetp = p;
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PROC_LOCK(targetp);
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} else {
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targetp = pfind(uap->pid);
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if (targetp == NULL) {
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e = ESRCH;
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goto done2;
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}
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}
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e = p_cansched(p, targetp);
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PROC_UNLOCK(targetp);
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if (e == 0) {
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e = ksched_setparam(&p->p_retval[0], ksched, targetp,
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(const struct sched_param *)&sched_param);
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}
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done2:
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mtx_unlock(&Giant);
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return (e);
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}
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/*
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* MPSAFE
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*/
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int sched_getparam(struct proc *p,
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struct sched_getparam_args *uap)
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{
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int e;
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struct sched_param sched_param;
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struct proc *targetp;
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mtx_lock(&Giant);
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if (uap->pid == 0) {
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targetp = p;
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PROC_LOCK(targetp);
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} else {
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targetp = pfind(uap->pid);
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if (targetp == NULL) {
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e = ESRCH;
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goto done2;
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}
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}
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e = p_cansee(p, targetp);
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PROC_UNLOCK(targetp);
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if (e)
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goto done2;
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e = ksched_getparam(&p->p_retval[0], ksched, targetp, &sched_param);
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if (e == 0)
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e = copyout(&sched_param, uap->param, sizeof(sched_param));
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done2:
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mtx_unlock(&Giant);
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return (e);
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}
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/*
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* MPSAFE
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*/
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int sched_setscheduler(struct proc *p,
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struct sched_setscheduler_args *uap)
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{
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int e;
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struct sched_param sched_param;
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struct proc *targetp;
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e = copyin(uap->param, &sched_param, sizeof(sched_param));
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if (e)
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return (e);
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mtx_lock(&Giant);
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if (uap->pid == 0) {
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targetp = p;
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PROC_LOCK(targetp);
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} else {
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targetp = pfind(uap->pid);
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if (targetp == NULL) {
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e = ESRCH;
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goto done2;
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}
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}
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e = p_cansched(p, targetp);
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PROC_UNLOCK(targetp);
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if (e == 0) {
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e = ksched_setscheduler(&p->p_retval[0], ksched,
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targetp, uap->policy,
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(const struct sched_param *)&sched_param);
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}
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done2:
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mtx_unlock(&Giant);
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return (e);
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}
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/*
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* MPSAFE
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*/
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int sched_getscheduler(struct proc *p,
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struct sched_getscheduler_args *uap)
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{
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int e;
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struct proc *targetp;
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mtx_lock(&Giant);
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if (uap->pid == 0) {
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targetp = p;
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PROC_LOCK(targetp);
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} else {
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targetp = pfind(uap->pid);
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if (targetp == NULL) {
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e = ESRCH;
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goto done2;
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}
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}
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e = p_cansee(p, targetp);
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PROC_UNLOCK(targetp);
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if (e == 0)
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e = ksched_getscheduler(&p->p_retval[0], ksched, targetp);
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done2:
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mtx_unlock(&Giant);
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return (e);
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}
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/*
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* MPSAFE
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*/
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int sched_yield(struct proc *p,
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struct sched_yield_args *uap)
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{
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int error;
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mtx_lock(&Giant);
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error = ksched_yield(&p->p_retval[0], ksched);
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mtx_unlock(&Giant);
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return (error);
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}
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/*
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* MPSAFE
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*/
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int sched_get_priority_max(struct proc *p,
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struct sched_get_priority_max_args *uap)
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{
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int error;
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mtx_lock(&Giant);
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error = ksched_get_priority_max(&p->p_retval[0], ksched, uap->policy);
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mtx_unlock(&Giant);
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return (error);
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}
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/*
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* MPSAFE
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*/
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int sched_get_priority_min(struct proc *p,
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struct sched_get_priority_min_args *uap)
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{
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int error;
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mtx_lock(&Giant);
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error = ksched_get_priority_min(&p->p_retval[0], ksched, uap->policy);
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mtx_unlock(&Giant);
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return (error);
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}
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/*
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* MPSAFE
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*/
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int sched_rr_get_interval(struct proc *p,
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struct sched_rr_get_interval_args *uap)
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{
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int e;
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struct proc *targetp;
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mtx_lock(&Giant);
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if (uap->pid == 0) {
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targetp = p;
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PROC_LOCK(targetp);
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} else {
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targetp = pfind(uap->pid);
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if (targetp == NULL) {
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e = ESRCH;
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goto done2;
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}
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}
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e = p_cansee(p, targetp);
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PROC_UNLOCK(targetp);
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if (e == 0) {
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e = ksched_rr_get_interval(&p->p_retval[0], ksched, targetp,
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uap->interval);
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}
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done2:
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mtx_unlock(&Giant);
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return (e);
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}
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#endif
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static void p31binit(void *notused)
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{
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(void) sched_attach();
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p31b_setcfg(CTL_P1003_1B_PAGESIZE, PAGE_SIZE);
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}
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SYSINIT(p31b, SI_SUB_P1003_1B, SI_ORDER_FIRST, p31binit, NULL);
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