usched_bsd4 - Topology-aware scheduling
[dragonfly.git] / sys / sys / proc.h
CommitLineData
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1/*-
2 * Copyright (c) 1986, 1989, 1991, 1993
3 * The Regents of the University of California. All rights reserved.
4 * (c) UNIX System Laboratories, Inc.
5 * All or some portions of this file are derived from material licensed
6 * to the University of California by American Telephone and Telegraph
7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
8 * the permission of UNIX System Laboratories, Inc.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the University of
21 * California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 *
38 * @(#)proc.h 8.15 (Berkeley) 5/19/95
39 * $FreeBSD: src/sys/sys/proc.h,v 1.99.2.9 2003/06/06 20:21:32 tegge Exp $
40 */
41
42#ifndef _SYS_PROC_H_
43#define _SYS_PROC_H_
44
05220613 45#if !defined(_KERNEL) && !defined(_KERNEL_STRUCTURES)
03d6a592 46
05220613 47#error "Userland must include sys/user.h instead of sys/proc.h"
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48
49#else
05220613 50
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51#include <sys/callout.h> /* For struct callout_handle. */
52#include <sys/filedesc.h>
53#include <sys/queue.h>
3e291793 54#include <sys/tree.h>
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55#include <sys/rtprio.h> /* For struct rtprio. */
56#include <sys/signal.h>
167e6ecb 57#include <sys/lock.h>
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58#ifndef _KERNEL
59#include <sys/time.h> /* For structs itimerval, timeval. */
60#endif
61#include <sys/ucred.h>
62#include <sys/event.h> /* For struct klist */
a591f597 63#include <sys/eventvar.h>
0855a2af 64#include <sys/sysent.h> /* For struct sysentvec */
84b592ba 65#include <sys/thread.h>
98a7f915 66#include <sys/varsym.h>
a722be49 67#include <sys/upcall.h>
93328593 68#include <sys/resourcevar.h>
ec12abe0 69#ifdef _KERNEL
a2a5ad0d 70#include <sys/globaldata.h>
ec12abe0 71#endif
dcc99b62 72#include <sys/systimer.h>
c4df9635 73#include <sys/iosched.h>
a77ac49d 74#include <sys/usched.h>
3020e3be 75#include <machine/proc.h> /* Machine-dependent proc substruct. */
acf2a718 76#include <machine/atomic.h> /* Machine-dependent proc substruct. */
b1b4e5a6 77#include <sys/signalvar.h>
84b592ba 78
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79LIST_HEAD(proclist, proc);
80LIST_HEAD(lwplist, lwp);
81
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82struct lwp_rb_tree;
83RB_HEAD(lwp_rb_tree, lwp);
84RB_PROTOTYPE2(lwp_rb_tree, lwp, u.lwp_rbnode, rb_lwp_compare, lwpid_t);
85
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86/*
87 * One structure allocated per session.
88 */
89struct session {
90 int s_count; /* Ref cnt; pgrps in session. */
91 struct proc *s_leader; /* Session leader. */
92 struct vnode *s_ttyvp; /* Vnode of controlling terminal. */
93 struct tty *s_ttyp; /* Controlling terminal. */
94 pid_t s_sid; /* Session ID */
95 char s_login[roundup(MAXLOGNAME, sizeof(long))]; /* Setlogin() name. */
96};
97
98/*
99 * One structure allocated per process group.
100 */
101struct pgrp {
102 LIST_ENTRY(pgrp) pg_hash; /* Hash chain. */
70d3d461 103 struct proclist pg_members; /* Pointer to pgrp members. */
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104 struct session *pg_session; /* Pointer to session. */
105 struct sigiolst pg_sigiolst; /* List of sigio sources. */
106 pid_t pg_id; /* Pgrp id. */
107 int pg_jobc; /* # procs qualifying pgrp for job control */
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108 u_int pg_refs;
109 struct lwkt_token pg_token;
110 struct lock pg_lock;
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111};
112
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113#define PS_NOCLDWAIT 0x0001 /* No zombies if child dies */
114#define PS_NOCLDSTOP 0x0002 /* No SIGCHLD when children stop. */
a0ae03a7 115#define PS_CLDSIGIGN 0x0004 /* The SIGCHLD handler is SIG_IGN. */
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116
117/*
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118 * pargs, used to hold a copy of the command line, if it had a sane
119 * length
120 */
121struct pargs {
122 u_int ar_ref; /* Reference count */
123 u_int ar_length; /* Length */
124 u_char ar_args[0]; /* Arguments */
125};
126
127/*
128 * Description of a process.
129 *
130 * This structure contains the information needed to manage a thread of
131 * control, known in UN*X as a process; it has references to substructures
132 * containing descriptions of things that the process uses, but may share
133 * with related processes. The process structure and the substructures
134 * are always addressable except for those marked "(PROC ONLY)" below,
135 * which might be addressable only on a processor on which the process
136 * is running.
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137 *
138 * NOTE! The process start time is stored in the thread structure associated
139 * with the process. If the process is a Zombie, then this field will be
140 * inaccessible due to the thread structure being free'd in kern_wait1().
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141 */
142
143struct jail;
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144struct vkernel_proc;
145struct vkernel_lwp;
287ebb09 146struct vmspace_entry;
29f58392 147struct ktrace_node;
984263bc 148
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149enum lwpstat {
150 LSRUN = 1,
151 LSSTOP = 2,
152 LSSLEEP = 3,
153};
154
155enum procstat {
156 SIDL = 1,
157 SACTIVE = 2,
158 SSTOP = 3,
416d05d7 159 SZOMB = 4,
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160};
161
ef09c3ed 162struct lwp {
ef09c3ed 163 TAILQ_ENTRY(lwp) lwp_procq; /* run/sleep queue. */
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164 union {
165 RB_ENTRY(lwp) lwp_rbnode; /* RB tree node - lwp in proc */
166 LIST_ENTRY(lwp) lwp_reap_entry; /* reaper list */
167 } u;
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168
169 struct proc *lwp_proc; /* Link to our proc. */
287ebb09 170 struct vmspace *lwp_vmspace; /* Inherited from p_vmspace */
39005e16 171 struct vkernel_lwp *lwp_vkernel;/* VKernel support, lwp part */
ef09c3ed 172
4643740a 173 lwpid_t lwp_tid; /* Our thread id */
ef09c3ed 174
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175 u_int lwp_flags; /* LWP_* flags */
176 u_int lwp_mpflags; /* LWP_MP_* flags */
177 enum lwpstat lwp_stat; /* LS* lwp status */
cc1d939b 178 int lwp_lock; /* lwp lock (prevent destruct) count */
ef09c3ed 179
4643740a 180 int lwp_dupfd; /* Sideways return value from fdopen */
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181
182 /*
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183 * The following two fields are marked XXX since (at least) the
184 * 4.4BSD-Lite2 import. I can only guess the reason: It is ugly.
185 * These fields are used to pass the trap code from trapsignal() to
186 * postsig(), which gets called later from userret().
187 *
188 * The correct "fix" for these XXX is to convert our signal system
189 * to use signal queues, where each signal can carry its own meta
190 * data.
191 */
192 int lwp_sig; /* for core dump/debugger XXX */
193 u_long lwp_code; /* for core dump/debugger XXX */
194
195 /*
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196 * Scheduling.
197 */
198 sysclock_t lwp_cpticks; /* cpu used in sched clock ticks */
199 sysclock_t lwp_cpbase; /* Measurement base */
200 fixpt_t lwp_pctcpu; /* %cpu for this process */
ef09c3ed 201 u_int lwp_slptime; /* Time since last blocked. */
d6d39bc7 202 u_int lwp_setrunqueue_ticks; /* Tick count - lwp set on runqueue */
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203
204 int lwp_traceflag; /* Kernel trace points. */
205
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206 struct rusage lwp_ru; /* stats for this lwp */
207
ef09c3ed 208 union usched_data lwp_usdata; /* User scheduler specific */
ef09c3ed 209
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210#define lwp_startcopy lwp_cpumask
211 cpumask_t lwp_cpumask;
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212 sigset_t lwp_siglist; /* Signals arrived but not delivered. */
213 sigset_t lwp_oldsigmask; /* saved mask from before sigpause */
214 sigset_t lwp_sigmask; /* Current signal mask. */
215 stack_t lwp_sigstk; /* sp & on stack state variable */
216
217 struct rtprio lwp_rtprio; /* Realtime priority. */
218#define lwp_endcopy lwp_md
219
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220 struct mdproc lwp_md; /* Any machine-dependent fields. */
221
222 struct thread *lwp_thread; /* backpointer to proc's thread */
223 struct upcall *lwp_upcall; /* REGISTERED USERLAND POINTER! */
a591f597 224 struct kqueue lwp_kqueue; /* for select/poll */
e5857bf7 225 u_int lwp_kqueue_serial;
e2b148c6 226 struct lwkt_token lwp_token; /* per-lwp token for signal/state */
94f98873 227 struct spinlock lwp_spin; /* spinlock for signal handling */
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228 void *lwp_reserveds1; /* reserved for lwp_saveusp */
229 void *lwp_reserveds2; /* reserved for lwp_saveupc */
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230};
231
984263bc 232struct proc {
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233 LIST_ENTRY(proc) p_list; /* List of all processes. */
234
235 /* substructures: */
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236 struct ucred *p_ucred; /* Process owner's identity. */
237 struct filedesc *p_fd; /* Ptr to open files structure. */
ef09c3ed 238 struct filedesc_to_leader *p_fdtol; /* Ptr to tracking node XXX lwp */
c46d7673 239 struct plimit *p_limit; /* Process limits. */
08f2f1bb 240 struct pstats *p_stats;
f2df0f7c 241 u_int p_mqueue_cnt; /* Count of open mqueues. */
c46d7673 242 void *p_pad0;
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243 struct sigacts *p_sigacts;
244#define p_sigignore p_sigacts->ps_sigignore
245#define p_sigcatch p_sigacts->ps_sigcatch
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246#define p_rlimit p_limit->pl_rlimit
247
4643740a 248 int p_flags; /* P_* flags. */
164b8401 249 enum procstat p_stat; /* S* process status. */
c46d7673 250 char p_pad1[3];
984263bc 251
c46d7673 252 pid_t p_pid; /* Process identifier. */
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253 LIST_ENTRY(proc) p_hash; /* Hash chain. */
254 LIST_ENTRY(proc) p_pglist; /* List of processes in pgrp. */
c46d7673 255 struct proc *p_pptr; /* Pointer to parent process. */
984263bc 256 LIST_ENTRY(proc) p_sibling; /* List of sibling processes. */
70d3d461 257 struct proclist p_children; /* Pointer to list of children. */
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258 struct callout p_ithandle; /* for scheduling p_realtimer */
259 struct varsymset p_varsymset;
c4df9635 260 struct iosched_data p_iosdata; /* Dynamic I/O scheduling data */
984263bc 261
c46d7673 262 pid_t p_oppid; /* Save parent pid during ptrace. XXX */
984263bc 263
d3313941 264 struct vmspace *p_vmspace; /* Current address space. */
984263bc 265
08f2f1bb 266 unsigned int p_swtime; /* Time swapped in or out */
984263bc 267
c46d7673 268 struct itimerval p_realtimer; /* Alarm timer. */
ef09c3ed 269 struct itimerval p_timer[3]; /* Virtual-time timers. */
984263bc 270
c46d7673 271 int p_traceflag; /* Kernel trace points. */
29f58392 272 struct ktrace_node *p_tracenode; /* Trace to vnode. */
984263bc 273
c46d7673 274 sigset_t p_siglist; /* Signals arrived but not delivered. */
984263bc 275
c46d7673 276 struct vnode *p_textvp; /* Vnode of executable. */
8ba5f7ef 277 struct nchandle p_textnch; /* namecache handle of executable. */
984263bc 278
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279 unsigned int p_stops; /* procfs event bitmask */
280 unsigned int p_stype; /* procfs stop event type */
c46d7673 281 char p_step; /* procfs stop *once* flag */
984263bc 282 unsigned char p_pfsflags; /* procfs flags */
352f5709 283 char p_pad2[2]; /* padding for alignment */
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284 struct sigiolst p_sigiolst; /* list of sigio sources */
285 int p_sigparent; /* signal to parent on exit */
c46d7673 286 struct klist p_klist; /* knotes attached to this process */
984263bc 287
ef09c3ed 288 struct timeval p_start; /* start time for a process */
ef09c3ed 289
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290 struct rusage p_ru; /* stats for this proc */
291 struct rusage p_cru; /* sum of stats for reaped children */
8c72e3d5 292 void *p_dsched_priv1;
fde7ac71 293
984263bc 294/* The following fields are all copied upon creation in fork. */
2966ed3e 295#define p_startcopy p_comm
984263bc 296
ef09c3ed 297 char p_comm[MAXCOMLEN+1]; /* typ 16+1 bytes */
0d355d3b 298 char p_pad3; /* Process lock (prevent destruct) count. */
c46d7673 299 char p_nice; /* Process "nice" value. */
0d355d3b 300 char p_pad4;
315b8b8b 301 int p_osrel; /* release date for binary ELF note */
984263bc 302
c46d7673 303 struct pgrp *p_pgrp; /* Pointer to process group. */
984263bc 304
c46d7673 305 struct sysentvec *p_sysent; /* System call dispatch information. */
984263bc 306
93328593 307 struct uprof p_prof; /* Profiling arguments. */
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308 struct rtprio p_rtprio; /* Realtime priority. */
309 struct pargs *p_args;
0d355d3b 310 u_short p_xstat; /* Exit status or last stop signal */
8c72e3d5 311
aa166ad1 312 int p_ionice;
8c72e3d5 313 void *p_dsched_priv2;
984263bc 314/* End area that is copied on creation. */
8c72e3d5 315#define p_endcopy p_dsched_priv2
c46d7673 316 u_short p_acflag; /* Accounting flags. */
c46d7673 317
0d355d3b 318 int p_lock; /* Prevent proc destruction */
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319 int p_nthreads; /* Number of threads in this process. */
320 int p_nstopped; /* Number of stopped threads. */
321 int p_lasttid; /* Last tid used. */
3e291793 322 struct lwp_rb_tree p_lwp_tree; /* RB tree of LWPs for this process */
c46d7673 323 void *p_aioinfo; /* ASYNC I/O info */
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324 int p_wakeup; /* thread id XXX lwp */
325 struct proc *p_peers; /* XXX lwp */
326 struct proc *p_leader; /* XXX lwp */
c46d7673 327 void *p_emuldata; /* process-specific emulator state */
c46d7673 328 struct usched *p_usched; /* Userland scheduling control */
39005e16 329 struct vkernel_proc *p_vkernel; /* VKernel support, proc part */
c46d7673 330 int p_numposixlocks; /* number of POSIX locks */
8ba5f7ef 331 void (*p_userret)(void);/* p: return-to-user hook */
ef09c3ed 332
c0b8a06d 333 struct spinlock p_spin; /* Spinlock for LWP access to proc */
5686ec5a 334 struct lwkt_token p_token; /* Token for LWP access to proc */
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335};
336
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337#define lwp_wchan lwp_thread->td_wchan
338#define lwp_wmesg lwp_thread->td_wmesg
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339#define p_session p_pgrp->pg_session
340#define p_pgid p_pgrp->pg_id
341
984263bc 342/* These flags are kept in p_flags. */
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343#define P_ADVLOCK 0x00001 /* Process may hold a POSIX advisory lock */
344#define P_CONTROLT 0x00002 /* Has a controlling terminal */
344ad853 345#define P_SWAPPEDOUT 0x00004 /* Swapped out of memory */
9b655f0e 346#define P_SYSVSEM 0x00008 /* Might have SysV semaphores */
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347#define P_PPWAIT 0x00010 /* Parent is waiting for child to exec/exit */
348#define P_PROFIL 0x00020 /* Has started profiling */
b2a6ad87 349#define P_POSTEXIT 0x00040 /* Prevent procfs from stepping after this pt */
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350#define P_UNUSED4 0x00080 /* was: Sleep is interruptible */
351#define P_SUGID 0x00100 /* Had set id privileges since last exec */
352#define P_SYSTEM 0x00200 /* System proc: no sigs, stats or swapping */
164b8401 353#define P_UNUSED2 0x00400 /* was: SIGSTOP status */
4643740a 354#define P_TRACED 0x00800 /* Debugged process being traced */
344ad853 355#define P_WAITED 0x01000 /* SIGSTOP status was returned by wait3/4 */
e3161323 356#define P_WEXIT 0x02000 /* Working on exiting (master exit) */
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357#define P_EXEC 0x04000 /* Process called exec */
358#define P_CONTINUED 0x08000 /* Proc has continued from a stopped state */
984263bc 359
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360#define P_UNUSED16 0x00010000
361#define P_UPCALLPEND 0x00020000 /* an upcall is pending */
984263bc 362
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363#define P_SWAPWAIT 0x00040000 /* Waiting for a swapin */
364#define P_UNUSED19 0x00080000 /* was: Now in a zombied state */
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365
366/* Marked a kernel thread */
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367#define P_UNUSED20 0x00100000 /* was: on a user scheduling run queue */
368#define P_KTHREADP 0x00200000 /* Process is really a kernel thread */
369#define P_IDLESWAP 0x00400000 /* Swapout was due to idleswap, not load */
370
371#define P_JAILED 0x01000000 /* Process is in jail */
372#define P_SIGVTALRM 0x02000000 /* signal SIGVTALRM pending due to itimer */
373#define P_SIGPROF 0x04000000 /* signal SIGPROF pending due to itimer */
374#define P_INEXEC 0x08000000 /* Process is in execve(). */
375#define P_UNUSED28 0x10000000
fe8c5e17 376#define P_UPCALLWAIT 0x20000000 /* Wait for upcall or signal */
c0b8a06d 377#define P_XCPU 0x40000000 /* SIGXCPU */
984263bc 378
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379#define LWP_ALTSTACK 0x0000001 /* have alternate signal stack */
380#define LWP_OLDMASK 0x0000002 /* need to restore mask before pause */
381#define LWP_SINTR 0x0000008 /* Sleep is interruptible. */
382#define LWP_SELECT 0x0000010 /* Selecting; wakeup/waiting danger. */
383#define LWP_UNUSED20 0x0000020
384#define LWP_UNUSED40 0x0000040
385#define LWP_UNUSED80 0x0000080
386#define LWP_PASSIVE_ACQ 0x0000100 /* Passive acquire cpu (see kern_switch) */
387#define LWP_PAGING 0x0000200 /* Currently in vm_fault */
388
7a313817 389/*
4643740a 390 * LWP_MP_WSTOP: When set the thread will stop prior to return to userland
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391 * and has been counted in the process stop-threads-count, but
392 * may still be running in kernel-land.
393 *
4643740a 394 * LWP_MP_WEXIT: When set the thread has been asked to exit and will not return
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395 * to userland. p_nthreads will not be decremented until the
396 * thread has actually exited.
397 */
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398#define LWP_MP_ONRUNQ 0x0000001 /* on a user scheduling run queue */
399#define LWP_MP_WEXIT 0x0000002 /* working on exiting */
400#define LWP_MP_WSTOP 0x0000004 /* working on stopping */
08f2f1bb 401
3e291793 402#define FIRST_LWP_IN_PROC(p) RB_FIRST(lwp_rb_tree, &(p)->p_lwp_tree)
fde7ac71 403#define FOREACH_LWP_IN_PROC(lp, p) \
3e291793 404 RB_FOREACH(lp, lwp_rb_tree, &(p)->p_lwp_tree)
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405#define ONLY_LWP_IN_PROC(p) \
406 (p->p_nthreads != 1 && \
407 (panic("%s: proc %p (pid %d cmd %s) has more than one thread", \
408 __func__, p, p->p_pid, p->p_comm), 1), \
3e291793 409 RB_ROOT(&p->p_lwp_tree))
fde7ac71 410
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411/*
412 * We use process IDs <= PID_MAX; PID_MAX + 1 must also fit in a pid_t,
413 * as it is used to represent "no process group".
414 */
415#define PID_MAX 99999
416#define NO_PID 100000
417
418#define SESS_LEADER(p) ((p)->p_session->s_leader == (p))
419
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420#ifdef _KERNEL
421
422#ifdef MALLOC_DECLARE
423MALLOC_DECLARE(M_SESSION);
fb2a331e 424MALLOC_DECLARE(M_PROC);
f6c36234 425MALLOC_DECLARE(M_LWP);
984263bc 426MALLOC_DECLARE(M_SUBPROC);
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427MALLOC_DECLARE(M_PARGS);
428#endif
429
9eaf083f 430/* for priv_check_cred() */
e4700d00 431#define NULL_CRED_OKAY 0x2
984263bc 432
95db0b6a 433/* Handy macro to determine if p1 can mangle p2 */
984263bc 434
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435#define PRISON_CHECK(cr1, cr2) \
436 ((!(cr1)->cr_prison) || (cr1)->cr_prison == (cr2)->cr_prison)
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437
438/*
8a8d5d85 439 * STOPEVENT
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440 */
441extern void stopevent(struct proc*, unsigned int, unsigned int);
442#define STOPEVENT(p,e,v) \
443 do { \
444 if ((p)->p_stops & (e)) { \
984263bc 445 stopevent(p,e,v); \
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446 } \
447 } while (0)
448
0d355d3b 449/*
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450 * Hold process in memory, don't destruct, used by ktrace, procfs, sigio,
451 * and signaling code (e.g. ksignal()).
452 *
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453 * MPSAFE
454 */
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455#define PHOLD(p) phold((p))
456#define PRELE(p) prele((p))
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457#define PHOLDZOMB(p) pholdzomb((p))
458#define PRELEZOMB(p) prelezomb((p))
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459#define PSTALL(p, msg, n) \
460 do { if ((p)->p_lock > (n)) pstall((p), (msg), (n)); } while (0)
984263bc 461
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462/*
463 * Hold lwp in memory, don't destruct, normally for ptrace/procfs work
464 * atomic ops because they can occur from an IPI.
465 * MPSAFE
466 */
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467#define LWPHOLD(lp) atomic_add_int(&(lp)->lwp_lock, 1)
468#define LWPRELE(lp) atomic_add_int(&(lp)->lwp_lock, -1)
cc1d939b 469
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470#define PIDHASH(pid) (&pidhashtbl[(pid) & pidhash])
471extern LIST_HEAD(pidhashhead, proc) *pidhashtbl;
472extern u_long pidhash;
473
474#define PGRPHASH(pgid) (&pgrphashtbl[(pgid) & pgrphash])
475extern LIST_HEAD(pgrphashhead, pgrp) *pgrphashtbl;
476extern u_long pgrphash;
477
8c72e3d5 478#if 0
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479#ifndef SET_CURPROC
480#define SET_CURPROC(p) (curproc = (p))
481#endif
984263bc 482#endif
84b592ba 483
984263bc 484extern struct proc proc0; /* Process slot for swapper. */
08f2f1bb 485extern struct lwp lwp0; /* LWP slot for swapper. */
b7c628e4 486extern struct thread thread0; /* Thread slot for swapper. */
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487extern int hogticks; /* Limit on kernel cpu hogs. */
488extern int nprocs, maxproc; /* Current and max number of procs. */
489extern int maxprocperuid; /* Max procs per uid. */
490extern int sched_quantum; /* Scheduling quantum in ticks */
491
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492extern struct proclist allproc; /* List of all processes. */
493extern struct proclist zombproc; /* List of zombie processes. */
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494extern struct proc *initproc; /* Process slot for init */
495extern struct thread *pagethread, *updatethread;
984263bc 496
984263bc 497/*
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498 * Scheduler independant variables. The primary scheduler polling frequency,
499 * the maximum ESTCPU value, and the weighting factor for nice values. A
500 * cpu bound program's estcpu will increase to ESTCPUMAX - 1.
984263bc 501 */
a46fac56 502#define ESTCPUFREQ 50
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503
504extern u_long ps_arg_cache_limit;
505extern int ps_argsopen;
28c57d20 506extern int ps_showallprocs;
984263bc 507
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508struct proc *pfind (pid_t); /* Find process by id w/ref */
509struct proc *pfindn (pid_t); /* Find process by id wo/ref */
510struct pgrp *pgfind (pid_t); /* Find process group by id w/ref */
511struct proc *zpfind (pid_t); /* Find zombie process by id w/ref */
512void pgref (struct pgrp *); /* Ref pgrp preventing disposal */
513void pgrel (struct pgrp *); /* Deref pgrp & dispose on 1->0 trans */
984263bc 514
a2a5ad0d 515struct globaldata;
91bd9c1e 516struct lwp_params;
984263bc 517
b153f746 518int enterpgrp (struct proc *p, pid_t pgid, int mksess);
51e64ff2 519void proc_add_allproc(struct proc *p);
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520void proc_move_allproc_zombie(struct proc *);
521void proc_remove_zombie(struct proc *);
522void allproc_scan(int (*callback)(struct proc *, void *), void *data);
c7e98b2f 523void alllwp_scan(int (*callback)(struct lwp *, void *), void *data);
5bf0d9b5 524void zombproc_scan(int (*callback)(struct proc *, void *), void *data);
b153f746 525void fixjobc (struct proc *p, struct pgrp *pgrp, int entering);
553ea3c8 526void updatepcpu(struct lwp *, int, int);
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527int inferior (struct proc *p);
528int leavepgrp (struct proc *p);
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529void sess_hold(struct session *sp);
530void sess_rele(struct session *sp);
b153f746 531void procinit (void);
26a0694b 532void relscurproc(struct proc *curp);
b153f746 533int p_trespass (struct ucred *cr1, struct ucred *cr2);
9a379a4a 534void setrunnable (struct lwp *);
f33e8653 535void proc_stop (struct proc *);
9a379a4a 536void proc_unstop (struct proc *);
fc17ad60 537void sleep_gdinit (struct globaldata *);
b153f746 538int suser (struct thread *td);
b153f746 539int suser_cred (struct ucred *cred, int flag);
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540thread_t cpu_heavy_switch (struct thread *);
541thread_t cpu_lwkt_switch (struct thread *);
b153f746 542
c6880072 543void cpu_lwp_exit (void) __dead2;
b153f746 544void cpu_thread_exit (void) __dead2;
e3161323 545void lwp_exit (int masterexit) __dead2;
c6880072 546void lwp_dispose (struct lwp *);
dc52e1cc 547int killalllwps (int);
b153f746 548void exit1 (int) __dead2;
bb3cd951 549void cpu_fork (struct lwp *, struct lwp *, int);
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550int cpu_prepare_lwp(struct lwp *, struct lwp_params *);
551void cpu_set_fork_handler (struct lwp *, void (*)(void *, struct trapframe *), void *);
0cfcada1 552void cpu_set_thread_handler(struct thread *td, void (*retfunc)(void), void *func, void *arg);
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553int fork1 (struct lwp *, int, struct proc **);
554void start_forked_proc (struct lwp *, struct proc *);
b153f746 555int trace_req (struct proc *);
b153f746 556void cpu_thread_wait (struct thread *);
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557void setsugid (void);
558void faultin (struct proc *p);
344ad853 559void swapin_request (void);
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560void phold (struct proc *);
561void prele (struct proc *);
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562int pholdzomb (struct proc *);
563void prelezomb (struct proc *);
82354ad8 564void pstall (struct proc *, const char *, int);
984263bc 565
b153f746 566u_int32_t procrunnable (void);
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567
568#endif /* _KERNEL */
569
03d6a592 570#endif /* _KERNEL || _KERNEL_STRUCTURES */
984263bc 571#endif /* !_SYS_PROC_H_ */