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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
#pragma ident "%Z%%M% %I% %E% SMI" /* from SVr4.0 1.12 */
#include <sys/types.h>
#include <sys/param.h>
#include <sys/sysmacros.h>
#include <sys/signal.h>
#include <sys/pcb.h>
#include <sys/user.h>
#include <sys/systm.h>
#include <sys/sysinfo.h>
#include <sys/var.h>
#include <sys/errno.h>
#include <sys/cmn_err.h>
#include <sys/proc.h>
#include <sys/debug.h>
#include <sys/inline.h>
#include <sys/disp.h>
#include <sys/class.h>
#include <sys/kmem.h>
#include <sys/cpuvar.h>
#include <sys/priocntl.h>
/*
* Class specific code for the sys class. There are no
* class specific data structures associated with
* the sys class and the scheduling policy is trivially
* simple. There is no time slicing.
*/
pri_t sys_init(id_t, int, classfuncs_t **);
static int sys_getclpri(pcpri_t *);
static int sys_fork(kthread_t *, kthread_t *, void *);
static int sys_enterclass(kthread_t *, id_t, void *, cred_t *, void *);
static int sys_canexit(kthread_t *, cred_t *);
static int sys_nosys();
static int sys_donice(kthread_t *, cred_t *, int, int *);
static int sys_doprio(kthread_t *, cred_t *, int, int *);
static void sys_forkret(kthread_t *, kthread_t *);
static void sys_nullsys();
static pri_t sys_swappri(kthread_t *, int);
static int sys_alloc(void **, int);
struct classfuncs sys_classfuncs = {
/* messages to class manager */
{
sys_nosys, /* admin */
sys_nosys, /* getclinfo */
sys_nosys, /* parmsin */
sys_nosys, /* parmsout */
sys_nosys, /* vaparmsin */
sys_nosys, /* vaparmsout */
sys_getclpri, /* getclpri */
sys_alloc,
sys_nullsys, /* free */
},
/* operations on threads */
{
sys_enterclass, /* enterclass */
sys_nullsys, /* exitclass */
sys_canexit,
sys_fork,
sys_forkret, /* forkret */
sys_nullsys, /* parmsget */
sys_nosys, /* parmsset */
sys_nullsys, /* stop */
sys_nullsys, /* exit */
sys_nullsys, /* active */
sys_nullsys, /* inactive */
sys_swappri, /* swapin */
sys_swappri, /* swapout */
sys_nullsys, /* trapret */
setfrontdq, /* preempt */
setbackdq, /* setrun */
sys_nullsys, /* sleep */
sys_nullsys, /* tick */
setbackdq, /* wakeup */
sys_donice,
(pri_t (*)())sys_nosys, /* globpri */
sys_nullsys, /* set_process_group */
sys_nullsys, /* yield */
sys_doprio,
}
};
/* ARGSUSED */
pri_t
sys_init(cid, clparmsz, clfuncspp)
id_t cid;
int clparmsz;
classfuncs_t **clfuncspp;
{
*clfuncspp = &sys_classfuncs;
return ((pri_t)v.v_maxsyspri);
}
/*
* Get maximum and minimum priorities enjoyed by sysclass threads
*/
static int
sys_getclpri(pcpri_t *pcprip)
{
pcprip->pc_clpmax = maxclsyspri;
pcprip->pc_clpmin = minclsyspri;
return (0);
}
/* ARGSUSED */
static int
sys_enterclass(t, cid, parmsp, reqpcredp, bufp)
kthread_t *t;
id_t cid;
void *parmsp;
cred_t *reqpcredp;
void *bufp;
{
return (0);
}
/* ARGSUSED */
static int
sys_canexit(kthread_t *t, cred_t *reqpcredp)
{
return (0);
}
/* ARGSUSED */
static int
sys_fork(t, ct, bufp)
kthread_t *t;
kthread_t *ct;
void *bufp;
{
/*
* No class specific data structure
*/
return (0);
}
/* ARGSUSED */
static void
sys_forkret(t, ct)
kthread_t *t;
kthread_t *ct;
{
register proc_t *pp = ttoproc(t);
register proc_t *cp = ttoproc(ct);
ASSERT(t == curthread);
ASSERT(MUTEX_HELD(&pidlock));
/*
* Grab the child's p_lock before dropping pidlock to ensure
* the process does not disappear before we set it running.
*/
mutex_enter(&cp->p_lock);
mutex_exit(&pidlock);
continuelwps(cp);
mutex_exit(&cp->p_lock);
mutex_enter(&pp->p_lock);
continuelwps(pp);
mutex_exit(&pp->p_lock);
}
/* ARGSUSED */
static pri_t
sys_swappri(t, flags)
kthread_t *t;
int flags;
{
return (-1);
}
static int
sys_nosys()
{
return (ENOSYS);
}
static void
sys_nullsys()
{
}
/* ARGSUSED */
static int
sys_donice(kthread_t *t, cred_t *cr, int incr, int *retvalp)
{
return (EINVAL);
}
/* ARGSUSED */
static int
sys_doprio(kthread_t *t, cred_t *cr, int incr, int *retvalp)
{
return (EINVAL);
}
/* ARGSUSED */
static int
sys_alloc(void **p, int flag)
{
*p = NULL;
return (0);
}
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