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6617724c5f
While the KSE project was quite successful in bringing threading to FreeBSD, the M:N approach taken by the kse library was never developed to its full potential. Backwards compatibility will be provided via libmap.conf for dynamically linked binaries and static binaries will be broken.
322 lines
7.4 KiB
C
322 lines
7.4 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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/* p1003_1b: Real Time common code.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_posix.h"
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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/priv.h>
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#include <sys/proc.h>
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#include <sys/posix4.h>
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#include <sys/syscallsubr.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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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 not run-time
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* supported. I am also logging since some programs start to use this when
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* 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 thread *td, 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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td->td_name, td->td_proc->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
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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
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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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int
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sched_setparam(struct thread *td, struct sched_setparam_args *uap)
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{
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struct thread *targettd;
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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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if (uap->pid == 0) {
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targetp = td->td_proc;
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targettd = td;
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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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return (ESRCH);
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targettd = FIRST_THREAD_IN_PROC(targetp);
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}
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e = p_cansched(td, targetp);
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if (e == 0) {
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e = ksched_setparam(ksched, targettd,
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(const struct sched_param *)&sched_param);
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}
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PROC_UNLOCK(targetp);
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return (e);
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}
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int
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sched_getparam(struct thread *td, 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 thread *targettd;
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struct proc *targetp;
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if (uap->pid == 0) {
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targetp = td->td_proc;
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targettd = td;
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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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return (ESRCH);
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}
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targettd = FIRST_THREAD_IN_PROC(targetp);
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}
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e = p_cansee(td, targetp);
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if (e == 0) {
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e = ksched_getparam(ksched, targettd, &sched_param);
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}
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PROC_UNLOCK(targetp);
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if (e == 0)
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e = copyout(&sched_param, uap->param, sizeof(sched_param));
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return (e);
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}
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int
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sched_setscheduler(struct thread *td, 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 thread *targettd;
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struct proc *targetp;
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/* Don't allow non root user to set a scheduler policy. */
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e = priv_check(td, PRIV_SCHED_SET);
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if (e)
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return (e);
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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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if (uap->pid == 0) {
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targetp = td->td_proc;
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targettd = td;
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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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return (ESRCH);
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targettd = FIRST_THREAD_IN_PROC(targetp);
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}
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e = p_cansched(td, targetp);
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if (e == 0) {
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e = ksched_setscheduler(ksched, targettd,
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uap->policy, (const struct sched_param *)&sched_param);
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}
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PROC_UNLOCK(targetp);
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return (e);
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}
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int
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sched_getscheduler(struct thread *td, struct sched_getscheduler_args *uap)
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{
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int e, policy;
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struct thread *targettd;
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struct proc *targetp;
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if (uap->pid == 0) {
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targetp = td->td_proc;
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targettd = td;
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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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targettd = FIRST_THREAD_IN_PROC(targetp);
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}
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e = p_cansee(td, targetp);
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if (e == 0) {
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e = ksched_getscheduler(ksched, targettd, &policy);
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td->td_retval[0] = policy;
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}
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PROC_UNLOCK(targetp);
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done2:
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return (e);
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}
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int
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sched_yield(struct thread *td, struct sched_yield_args *uap)
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{
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sched_relinquish(curthread);
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return 0;
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}
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int
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sched_get_priority_max(struct thread *td,
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struct sched_get_priority_max_args *uap)
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{
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int error, prio;
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error = ksched_get_priority_max(ksched, uap->policy, &prio);
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td->td_retval[0] = prio;
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return (error);
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}
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int
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sched_get_priority_min(struct thread *td,
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struct sched_get_priority_min_args *uap)
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{
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int error, prio;
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error = ksched_get_priority_min(ksched, uap->policy, &prio);
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td->td_retval[0] = prio;
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return (error);
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}
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int
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sched_rr_get_interval(struct thread *td,
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struct sched_rr_get_interval_args *uap)
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{
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struct timespec timespec;
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int error;
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error = kern_sched_rr_get_interval(td, uap->pid, ×pec);
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if (error == 0)
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error = copyout(×pec, uap->interval, sizeof(timespec));
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return (error);
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}
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int
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kern_sched_rr_get_interval(struct thread *td, pid_t pid,
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struct timespec *ts)
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{
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int e;
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struct thread *targettd;
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struct proc *targetp;
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if (pid == 0) {
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targettd = td;
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targetp = td->td_proc;
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PROC_LOCK(targetp);
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} else {
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targetp = td->td_proc;
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PROC_LOCK(targetp);
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targettd = thread_find(targetp, pid);
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if (targettd == NULL) {
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PROC_UNLOCK(targetp);
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return (ESRCH);
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}
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}
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e = p_cansee(td, targetp);
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if (e == 0)
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e = ksched_rr_get_interval(ksched, targettd, ts);
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PROC_UNLOCK(targetp);
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return (e);
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}
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#endif
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static void
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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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