1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 
  22 /*
  23  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26 
  27 /*      Copyright (c) 1988 AT&T     */
  28 /*        All Rights Reserved   */
  29 
  30 #ifndef _SYS_CLASS_H
  31 #define _SYS_CLASS_H
  32 
  33 #include <sys/t_lock.h>
  34 #include <sys/cred.h>
  35 #include <sys/thread.h>
  36 #include <sys/priocntl.h>
  37 #include <sys/mutex.h>
  38 #include <sys/uio.h>
  39 
  40 #ifdef  __cplusplus
  41 extern "C" {
  42 #endif
  43 
  44 /*
  45  * NOTE: Developers making use of the scheduler class switch mechanism
  46  * to develop scheduling class modules should be aware that the
  47  * architecture is not frozen and the kernel interface for scheduling
  48  * class modules may change in future releases of System V.  Support
  49  * for the current interface is not guaranteed and class modules
  50  * developed to this interface may require changes in order to work
  51  * with future releases of the system.
  52  */
  53 
  54 /*
  55  * three different ops vectors are bundled together, here.
  56  * one is for each of the fundamental objects acted upon
  57  * by these operators: procs, threads, and the class manager itself.
  58  */
  59 
  60 typedef struct class_ops {
  61         int     (*cl_admin)(caddr_t, cred_t *);
  62         int     (*cl_getclinfo)(void *);
  63         int     (*cl_parmsin)(void *);
  64         int     (*cl_parmsout)(void *, pc_vaparms_t *);
  65         int     (*cl_vaparmsin)(void *, pc_vaparms_t *);
  66         int     (*cl_vaparmsout)(void *, pc_vaparms_t *);
  67         int     (*cl_getclpri)(pcpri_t *);
  68         int     (*cl_alloc)(void **, int);
  69         void    (*cl_free)(void *);
  70 } class_ops_t;
  71 
  72 typedef struct thread_ops {
  73         int     (*cl_enterclass)(kthread_t *, id_t, void *, cred_t *, void *);
  74         void    (*cl_exitclass)(void *);
  75         int     (*cl_canexit)(kthread_t *, cred_t *);
  76         int     (*cl_fork)(kthread_t *, kthread_t *, void *);
  77         void    (*cl_forkret)(kthread_t *, kthread_t *);
  78         void    (*cl_parmsget)(kthread_t *, void *);
  79         int     (*cl_parmsset)(kthread_t *, void *, id_t, cred_t *);
  80         void    (*cl_stop)(kthread_t *, int, int);
  81         void    (*cl_exit)(kthread_t *);
  82         void    (*cl_active)(kthread_t *);
  83         void    (*cl_inactive)(kthread_t *);
  84         void    (*cl_trapret)(kthread_t *);
  85         void    (*cl_preempt)(kthread_t *);
  86         void    (*cl_setrun)(kthread_t *);
  87         void    (*cl_sleep)(kthread_t *);
  88         void    (*cl_tick)(kthread_t *);
  89         void    (*cl_wakeup)(kthread_t *);
  90         int     (*cl_donice)(kthread_t *, cred_t *, int, int *);
  91         pri_t   (*cl_globpri)(kthread_t *);
  92         void    (*cl_set_process_group)(pid_t, pid_t, pid_t);
  93         void    (*cl_yield)(kthread_t *);
  94         int     (*cl_doprio)(kthread_t *, cred_t *, int, int *);
  95 } thread_ops_t;
  96 
  97 typedef struct classfuncs {
  98         class_ops_t     sclass;
  99         thread_ops_t    thread;
 100 } classfuncs_t;
 101 
 102 typedef struct sclass {
 103         char            *cl_name;       /* class name */
 104         /* class specific initialization function */
 105         pri_t           (*cl_init)(id_t, int, classfuncs_t **);
 106         classfuncs_t    *cl_funcs;      /* pointer to classfuncs structure */
 107         krwlock_t       *cl_lock;       /* class structure read/write lock */
 108         int             cl_count;       /* # of threads trying to load class */
 109 } sclass_t;
 110 
 111 #define STATIC_SCHED            (krwlock_t *)0xffffffff
 112 #define LOADABLE_SCHED(s)       ((s)->cl_lock != STATIC_SCHED)
 113 #define SCHED_INSTALLED(s)      ((s)->cl_funcs != NULL)
 114 #define ALLOCATED_SCHED(s)      ((s)->cl_lock != NULL)
 115 
 116 #ifdef  _KERNEL
 117 
 118 #define CLASS_KERNEL(cid)       ((cid) == syscid || (cid) == sysdccid)
 119 
 120 extern int      nclass;         /* number of configured scheduling classes */
 121 extern char     *defaultclass;  /* default class for newproc'd processes */
 122 extern struct sclass sclass[];  /* the class table */
 123 extern kmutex_t class_lock;     /* lock protecting class table */
 124 extern int      loaded_classes; /* number of classes loaded */
 125 
 126 extern pri_t    minclsyspri;
 127 extern id_t     syscid;         /* system scheduling class ID */
 128 extern id_t     sysdccid;       /* system duty-cycle scheduling class ID */
 129 extern id_t     defaultcid;     /* "default" class id; see dispadmin(1M) */
 130 
 131 extern int      alloc_cid(char *, id_t *);
 132 extern int      scheduler_load(char *, sclass_t *);
 133 extern int      getcid(char *, id_t *);
 134 extern int      getcidbyname(char *, id_t *);
 135 extern int      parmsin(pcparms_t *, pc_vaparms_t *);
 136 extern int      parmsout(pcparms_t *, pc_vaparms_t *);
 137 extern int      parmsset(pcparms_t *, kthread_t *);
 138 extern void     parmsget(kthread_t *, pcparms_t *);
 139 extern int      vaparmsout(char *, pcparms_t *, pc_vaparms_t *, uio_seg_t);
 140 
 141 #endif
 142 
 143 #define CL_ADMIN(clp, uaddr, reqpcredp) \
 144         (*(clp)->cl_funcs->sclass.cl_admin)(uaddr, reqpcredp)
 145 
 146 #define CL_ENTERCLASS(t, cid, clparmsp, credp, bufp) \
 147         (sclass[cid].cl_funcs->thread.cl_enterclass) (t, cid, \
 148             (void *)clparmsp, credp, bufp)
 149 
 150 #define CL_EXITCLASS(cid, clprocp)\
 151         (sclass[cid].cl_funcs->thread.cl_exitclass) ((void *)clprocp)
 152 
 153 #define CL_CANEXIT(t, cr)       (*(t)->t_clfuncs->cl_canexit)(t, cr)
 154 
 155 #define CL_FORK(tp, ct, bufp)   (*(tp)->t_clfuncs->cl_fork)(tp, ct, bufp)
 156 
 157 #define CL_FORKRET(t, ct)       (*(t)->t_clfuncs->cl_forkret)(t, ct)
 158 
 159 #define CL_GETCLINFO(clp, clinfop) \
 160         (*(clp)->cl_funcs->sclass.cl_getclinfo)((void *)clinfop)
 161 
 162 #define CL_GETCLPRI(clp, clprip) \
 163         (*(clp)->cl_funcs->sclass.cl_getclpri)(clprip)
 164 
 165 #define CL_PARMSGET(t, clparmsp) \
 166         (*(t)->t_clfuncs->cl_parmsget)(t, (void *)clparmsp)
 167 
 168 #define CL_PARMSIN(clp, clparmsp) \
 169         (clp)->cl_funcs->sclass.cl_parmsin((void *)clparmsp)
 170 
 171 #define CL_PARMSOUT(clp, clparmsp, vaparmsp) \
 172         (clp)->cl_funcs->sclass.cl_parmsout((void *)clparmsp, vaparmsp)
 173 
 174 #define CL_VAPARMSIN(clp, clparmsp, vaparmsp) \
 175         (clp)->cl_funcs->sclass.cl_vaparmsin((void *)clparmsp, vaparmsp)
 176 
 177 #define CL_VAPARMSOUT(clp, clparmsp, vaparmsp) \
 178         (clp)->cl_funcs->sclass.cl_vaparmsout((void *)clparmsp, vaparmsp)
 179 
 180 #define CL_PARMSSET(t, clparmsp, cid, curpcredp) \
 181         (*(t)->t_clfuncs->cl_parmsset)(t, (void *)clparmsp, cid, curpcredp)
 182 
 183 #define CL_PREEMPT(tp)          (*(tp)->t_clfuncs->cl_preempt)(tp)
 184 
 185 #define CL_SETRUN(tp)           (*(tp)->t_clfuncs->cl_setrun)(tp)
 186 
 187 #define CL_SLEEP(tp)            (*(tp)->t_clfuncs->cl_sleep)(tp)
 188 
 189 #define CL_STOP(t, why, what)   (*(t)->t_clfuncs->cl_stop)(t, why, what)
 190 
 191 #define CL_EXIT(t)              (*(t)->t_clfuncs->cl_exit)(t)
 192 
 193 #define CL_ACTIVE(t)            (*(t)->t_clfuncs->cl_active)(t)
 194 
 195 #define CL_INACTIVE(t)          (*(t)->t_clfuncs->cl_inactive)(t)
 196 
 197 #define CL_TICK(t)              (*(t)->t_clfuncs->cl_tick)(t)
 198 
 199 #define CL_TRAPRET(t)           (*(t)->t_clfuncs->cl_trapret)(t)
 200 
 201 #define CL_WAKEUP(t)            (*(t)->t_clfuncs->cl_wakeup)(t)
 202 
 203 #define CL_DONICE(t, cr, inc, ret) \
 204         (*(t)->t_clfuncs->cl_donice)(t, cr, inc, ret)
 205 
 206 #define CL_DOPRIO(t, cr, inc, ret) \
 207         (*(t)->t_clfuncs->cl_doprio)(t, cr, inc, ret)
 208 
 209 #define CL_GLOBPRI(t)           (*(t)->t_clfuncs->cl_globpri)(t)
 210 
 211 #define CL_SET_PROCESS_GROUP(t, s, b, f) \
 212         (*(t)->t_clfuncs->cl_set_process_group)(s, b, f)
 213 
 214 #define CL_YIELD(tp)            (*(tp)->t_clfuncs->cl_yield)(tp)
 215 
 216 #define CL_ALLOC(pp, cid, flag) \
 217         (sclass[cid].cl_funcs->sclass.cl_alloc) (pp, flag)
 218 
 219 #define CL_FREE(cid, bufp)      (sclass[cid].cl_funcs->sclass.cl_free) (bufp)
 220 
 221 #ifdef  __cplusplus
 222 }
 223 #endif
 224 
 225 #endif  /* _SYS_CLASS_H */