freebsd-skq/sys/posix4/p1003_1b.c
julian b5eb64d6f0 Pre-KSE/M3 commit.
this is a low-functionality change that changes the kernel to access the main
thread of a process via the linked list of threads rather than
assuming that it is embedded in the process. It IS still embeded there
but remove all teh code that assumes that in preparation for the next commit
which will actually move it out.

Reviewed by: peter@freebsd.org, gallatin@cs.duke.edu, benno rice,
2002-02-07 20:58:47 +00:00

343 lines
7.6 KiB
C

/*
* Copyright (c) 1996, 1997, 1998
* HD Associates, Inc. All rights reserved.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by HD Associates, Inc
* 4. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY HD ASSOCIATES 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 HD ASSOCIATES 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.
*
* $FreeBSD$
*/
/* p1003_1b: Real Time common code.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/module.h>
#include <sys/mutex.h>
#include <sys/proc.h>
#include <sys/sysctl.h>
#include <sys/sysent.h>
#include <sys/syslog.h>
#include <sys/sysproto.h>
#include <posix4/posix4.h>
MALLOC_DEFINE(M_P31B, "p1003.1b", "Posix 1003.1B");
/* The system calls return ENOSYS if an entry is called that is
* not run-time supported. I am also logging since some programs
* start to use this when they shouldn't. That will be removed if annoying.
*/
int
syscall_not_present(struct thread *td, const char *s, struct nosys_args *uap)
{
log(LOG_ERR, "cmd %s pid %d tried to use non-present %s\n",
td->td_proc->p_comm, td->td_proc->p_pid, s);
/* a " return nosys(p, uap); " here causes a core dump.
*/
return ENOSYS;
}
#if !defined(_KPOSIX_PRIORITY_SCHEDULING)
/* Not configured but loadable via a module:
*/
static int sched_attach(void)
{
return 0;
}
SYSCALL_NOT_PRESENT_GEN(sched_setparam)
SYSCALL_NOT_PRESENT_GEN(sched_getparam)
SYSCALL_NOT_PRESENT_GEN(sched_setscheduler)
SYSCALL_NOT_PRESENT_GEN(sched_getscheduler)
SYSCALL_NOT_PRESENT_GEN(sched_yield)
SYSCALL_NOT_PRESENT_GEN(sched_get_priority_max)
SYSCALL_NOT_PRESENT_GEN(sched_get_priority_min)
SYSCALL_NOT_PRESENT_GEN(sched_rr_get_interval)
#else
/* Configured in kernel version:
*/
static struct ksched *ksched;
static int sched_attach(void)
{
int ret = ksched_attach(&ksched);
if (ret == 0)
p31b_setcfg(CTL_P1003_1B_PRIORITY_SCHEDULING, 1);
return ret;
}
/*
* MPSAFE
*/
int sched_setparam(struct thread *td,
struct sched_setparam_args *uap)
{
struct thread *targettd;
struct proc *targetp;
int e;
struct sched_param sched_param;
e = copyin(uap->param, &sched_param, sizeof(sched_param));
if (e)
return (e);
mtx_lock(&Giant);
if (uap->pid == 0) {
targetp = td->td_proc;
targettd = td;
PROC_LOCK(targetp);
} else {
targetp = pfind(uap->pid);
if (targetp == NULL) {
e = ESRCH;
goto done2;
}
targettd = FIRST_THREAD_IN_PROC(targetp); /* XXXKSE */
}
e = p_cansched(td->td_proc, targetp);
PROC_UNLOCK(targetp);
if (e == 0) {
e = ksched_setparam(&td->td_retval[0], ksched, targettd,
(const struct sched_param *)&sched_param);
}
done2:
mtx_unlock(&Giant);
return (e);
}
/*
* MPSAFE
*/
int sched_getparam(struct thread *td,
struct sched_getparam_args *uap)
{
int e;
struct sched_param sched_param;
struct thread *targettd;
struct proc *targetp;
mtx_lock(&Giant);
if (uap->pid == 0) {
targetp = td->td_proc;
targettd = td;
PROC_LOCK(targetp);
} else {
targetp = pfind(uap->pid);
if (targetp == NULL) {
e = ESRCH;
goto done2;
}
targettd = FIRST_THREAD_IN_PROC(targetp); /* XXXKSE */
}
e = p_cansee(td->td_proc, targetp);
PROC_UNLOCK(targetp);
if (e)
goto done2;
e = ksched_getparam(&td->td_retval[0], ksched, targettd, &sched_param);
if (e == 0)
e = copyout(&sched_param, uap->param, sizeof(sched_param));
done2:
mtx_unlock(&Giant);
return (e);
}
/*
* MPSAFE
*/
int sched_setscheduler(struct thread *td,
struct sched_setscheduler_args *uap)
{
int e;
struct sched_param sched_param;
struct thread *targettd;
struct proc *targetp;
e = copyin(uap->param, &sched_param, sizeof(sched_param));
if (e)
return (e);
mtx_lock(&Giant);
if (uap->pid == 0) {
targetp = td->td_proc;
targettd = td;
PROC_LOCK(targetp);
} else {
targetp = pfind(uap->pid);
if (targetp == NULL) {
e = ESRCH;
goto done2;
}
targettd = FIRST_THREAD_IN_PROC(targetp); /* XXXKSE */
}
e = p_cansched(td->td_proc, targetp);
PROC_UNLOCK(targetp);
if (e == 0) {
e = ksched_setscheduler(&td->td_retval[0], ksched, targettd,
uap->policy, (const struct sched_param *)&sched_param);
}
done2:
mtx_unlock(&Giant);
return (e);
}
/*
* MPSAFE
*/
int sched_getscheduler(struct thread *td,
struct sched_getscheduler_args *uap)
{
int e;
struct thread *targettd;
struct proc *targetp;
mtx_lock(&Giant);
if (uap->pid == 0) {
targetp = td->td_proc;
targettd = td;
PROC_LOCK(targetp);
} else {
targetp = pfind(uap->pid);
if (targetp == NULL) {
e = ESRCH;
goto done2;
}
targettd = FIRST_THREAD_IN_PROC(targetp); /* XXXKSE */
}
e = p_cansee(td->td_proc, targetp);
PROC_UNLOCK(targetp);
if (e == 0)
e = ksched_getscheduler(&td->td_retval[0], ksched, targettd);
done2:
mtx_unlock(&Giant);
return (e);
}
/*
* MPSAFE
*/
int sched_yield(struct thread *td,
struct sched_yield_args *uap)
{
int error;
mtx_lock(&Giant);
error = ksched_yield(&td->td_retval[0], ksched);
mtx_unlock(&Giant);
return (error);
}
/*
* MPSAFE
*/
int sched_get_priority_max(struct thread *td,
struct sched_get_priority_max_args *uap)
{
int error;
mtx_lock(&Giant);
error = ksched_get_priority_max(&td->td_retval[0], ksched, uap->policy);
mtx_unlock(&Giant);
return (error);
}
/*
* MPSAFE
*/
int sched_get_priority_min(struct thread *td,
struct sched_get_priority_min_args *uap)
{
int error;
mtx_lock(&Giant);
error = ksched_get_priority_min(&td->td_retval[0], ksched, uap->policy);
mtx_unlock(&Giant);
return (error);
}
/*
* MPSAFE
*/
int sched_rr_get_interval(struct thread *td,
struct sched_rr_get_interval_args *uap)
{
int e;
struct thread *targettd;
struct proc *targetp;
mtx_lock(&Giant);
if (uap->pid == 0) {
targettd = td;
targetp = td->td_proc;
PROC_LOCK(targetp);
} else {
targetp = pfind(uap->pid);
if (targetp == NULL) {
e = ESRCH;
goto done2;
}
targettd = FIRST_THREAD_IN_PROC(targetp); /* XXXKSE */
}
e = p_cansee(td->td_proc, targetp);
PROC_UNLOCK(targetp);
if (e == 0) {
e = ksched_rr_get_interval(&td->td_retval[0], ksched, targettd,
uap->interval);
}
done2:
mtx_unlock(&Giant);
return (e);
}
#endif
static void p31binit(void *notused)
{
(void) sched_attach();
p31b_setcfg(CTL_P1003_1B_PAGESIZE, PAGE_SIZE);
}
SYSINIT(p31b, SI_SUB_P1003_1B, SI_ORDER_FIRST, p31binit, NULL);