kernel - Misc fixes and debugging
[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. */
115
116/*
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117 * pargs, used to hold a copy of the command line, if it had a sane
118 * length
119 */
120struct pargs {
121 u_int ar_ref; /* Reference count */
122 u_int ar_length; /* Length */
123 u_char ar_args[0]; /* Arguments */
124};
125
126/*
127 * Description of a process.
128 *
129 * This structure contains the information needed to manage a thread of
130 * control, known in UN*X as a process; it has references to substructures
131 * containing descriptions of things that the process uses, but may share
132 * with related processes. The process structure and the substructures
133 * are always addressable except for those marked "(PROC ONLY)" below,
134 * which might be addressable only on a processor on which the process
135 * is running.
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136 *
137 * NOTE! The process start time is stored in the thread structure associated
138 * with the process. If the process is a Zombie, then this field will be
139 * inaccessible due to the thread structure being free'd in kern_wait1().
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140 */
141
142struct jail;
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143struct vkernel_proc;
144struct vkernel_lwp;
287ebb09 145struct vmspace_entry;
29f58392 146struct ktrace_node;
984263bc 147
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148enum lwpstat {
149 LSRUN = 1,
150 LSSTOP = 2,
151 LSSLEEP = 3,
152};
153
154enum procstat {
155 SIDL = 1,
156 SACTIVE = 2,
157 SSTOP = 3,
416d05d7 158 SZOMB = 4,
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159};
160
ef09c3ed 161struct lwp {
ef09c3ed 162 TAILQ_ENTRY(lwp) lwp_procq; /* run/sleep queue. */
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163 union {
164 RB_ENTRY(lwp) lwp_rbnode; /* RB tree node - lwp in proc */
165 LIST_ENTRY(lwp) lwp_reap_entry; /* reaper list */
166 } u;
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167
168 struct proc *lwp_proc; /* Link to our proc. */
287ebb09 169 struct vmspace *lwp_vmspace; /* Inherited from p_vmspace */
39005e16 170 struct vkernel_lwp *lwp_vkernel;/* VKernel support, lwp part */
ef09c3ed 171
4643740a 172 lwpid_t lwp_tid; /* Our thread id */
ef09c3ed 173
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174 u_int lwp_flags; /* LWP_* flags */
175 u_int lwp_mpflags; /* LWP_MP_* flags */
176 enum lwpstat lwp_stat; /* LS* lwp status */
cc1d939b 177 int lwp_lock; /* lwp lock (prevent destruct) count */
ef09c3ed 178
4643740a 179 int lwp_dupfd; /* Sideways return value from fdopen */
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180
181 /*
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182 * The following two fields are marked XXX since (at least) the
183 * 4.4BSD-Lite2 import. I can only guess the reason: It is ugly.
184 * These fields are used to pass the trap code from trapsignal() to
185 * postsig(), which gets called later from userret().
186 *
187 * The correct "fix" for these XXX is to convert our signal system
188 * to use signal queues, where each signal can carry its own meta
189 * data.
190 */
191 int lwp_sig; /* for core dump/debugger XXX */
192 u_long lwp_code; /* for core dump/debugger XXX */
193
194 /*
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195 * Scheduling.
196 */
197 sysclock_t lwp_cpticks; /* cpu used in sched clock ticks */
198 sysclock_t lwp_cpbase; /* Measurement base */
199 fixpt_t lwp_pctcpu; /* %cpu for this process */
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200 u_int lwp_slptime; /* Time since last blocked. */
201
202 int lwp_traceflag; /* Kernel trace points. */
203
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204 struct rusage lwp_ru; /* stats for this lwp */
205
ef09c3ed 206 union usched_data lwp_usdata; /* User scheduler specific */
ef09c3ed 207
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208#define lwp_startcopy lwp_cpumask
209 cpumask_t lwp_cpumask;
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210 sigset_t lwp_siglist; /* Signals arrived but not delivered. */
211 sigset_t lwp_oldsigmask; /* saved mask from before sigpause */
212 sigset_t lwp_sigmask; /* Current signal mask. */
213 stack_t lwp_sigstk; /* sp & on stack state variable */
214
215 struct rtprio lwp_rtprio; /* Realtime priority. */
216#define lwp_endcopy lwp_md
217
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218 struct mdproc lwp_md; /* Any machine-dependent fields. */
219
220 struct thread *lwp_thread; /* backpointer to proc's thread */
221 struct upcall *lwp_upcall; /* REGISTERED USERLAND POINTER! */
a591f597 222 struct kqueue lwp_kqueue; /* for select/poll */
e5857bf7 223 u_int lwp_kqueue_serial;
e2b148c6 224 struct lwkt_token lwp_token; /* per-lwp token for signal/state */
94f98873 225 struct spinlock lwp_spin; /* spinlock for signal handling */
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226 void *lwp_reserveds1; /* reserved for lwp_saveusp */
227 void *lwp_reserveds2; /* reserved for lwp_saveupc */
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228};
229
984263bc 230struct proc {
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231 LIST_ENTRY(proc) p_list; /* List of all processes. */
232
233 /* substructures: */
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234 struct ucred *p_ucred; /* Process owner's identity. */
235 struct filedesc *p_fd; /* Ptr to open files structure. */
ef09c3ed 236 struct filedesc_to_leader *p_fdtol; /* Ptr to tracking node XXX lwp */
c46d7673 237 struct plimit *p_limit; /* Process limits. */
08f2f1bb 238 struct pstats *p_stats;
f2df0f7c 239 u_int p_mqueue_cnt; /* Count of open mqueues. */
c46d7673 240 void *p_pad0;
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241 struct sigacts *p_sigacts;
242#define p_sigignore p_sigacts->ps_sigignore
243#define p_sigcatch p_sigacts->ps_sigcatch
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244#define p_rlimit p_limit->pl_rlimit
245
4643740a 246 int p_flags; /* P_* flags. */
164b8401 247 enum procstat p_stat; /* S* process status. */
c46d7673 248 char p_pad1[3];
984263bc 249
c46d7673 250 pid_t p_pid; /* Process identifier. */
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251 LIST_ENTRY(proc) p_hash; /* Hash chain. */
252 LIST_ENTRY(proc) p_pglist; /* List of processes in pgrp. */
c46d7673 253 struct proc *p_pptr; /* Pointer to parent process. */
984263bc 254 LIST_ENTRY(proc) p_sibling; /* List of sibling processes. */
70d3d461 255 struct proclist p_children; /* Pointer to list of children. */
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256 struct callout p_ithandle; /* for scheduling p_realtimer */
257 struct varsymset p_varsymset;
c4df9635 258 struct iosched_data p_iosdata; /* Dynamic I/O scheduling data */
984263bc 259
c46d7673 260 pid_t p_oppid; /* Save parent pid during ptrace. XXX */
984263bc 261
d3313941 262 struct vmspace *p_vmspace; /* Current address space. */
984263bc 263
08f2f1bb 264 unsigned int p_swtime; /* Time swapped in or out */
984263bc 265
c46d7673 266 struct itimerval p_realtimer; /* Alarm timer. */
ef09c3ed 267 struct itimerval p_timer[3]; /* Virtual-time timers. */
984263bc 268
c46d7673 269 int p_traceflag; /* Kernel trace points. */
29f58392 270 struct ktrace_node *p_tracenode; /* Trace to vnode. */
984263bc 271
c46d7673 272 sigset_t p_siglist; /* Signals arrived but not delivered. */
984263bc 273
c46d7673 274 struct vnode *p_textvp; /* Vnode of executable. */
8ba5f7ef 275 struct nchandle p_textnch; /* namecache handle of executable. */
984263bc 276
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277 unsigned int p_stops; /* procfs event bitmask */
278 unsigned int p_stype; /* procfs stop event type */
c46d7673 279 char p_step; /* procfs stop *once* flag */
984263bc 280 unsigned char p_pfsflags; /* procfs flags */
352f5709 281 char p_pad2[2]; /* padding for alignment */
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282 struct sigiolst p_sigiolst; /* list of sigio sources */
283 int p_sigparent; /* signal to parent on exit */
c46d7673 284 struct klist p_klist; /* knotes attached to this process */
984263bc 285
ef09c3ed 286 struct timeval p_start; /* start time for a process */
ef09c3ed 287
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288 struct rusage p_ru; /* stats for this proc */
289 struct rusage p_cru; /* sum of stats for reaped children */
8c72e3d5 290 void *p_dsched_priv1;
fde7ac71 291
984263bc 292/* The following fields are all copied upon creation in fork. */
2966ed3e 293#define p_startcopy p_comm
984263bc 294
ef09c3ed 295 char p_comm[MAXCOMLEN+1]; /* typ 16+1 bytes */
0d355d3b 296 char p_pad3; /* Process lock (prevent destruct) count. */
c46d7673 297 char p_nice; /* Process "nice" value. */
0d355d3b 298 char p_pad4;
315b8b8b 299 int p_osrel; /* release date for binary ELF note */
984263bc 300
c46d7673 301 struct pgrp *p_pgrp; /* Pointer to process group. */
984263bc 302
c46d7673 303 struct sysentvec *p_sysent; /* System call dispatch information. */
984263bc 304
93328593 305 struct uprof p_prof; /* Profiling arguments. */
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306 struct rtprio p_rtprio; /* Realtime priority. */
307 struct pargs *p_args;
0d355d3b 308 u_short p_xstat; /* Exit status or last stop signal */
8c72e3d5 309
aa166ad1 310 int p_ionice;
8c72e3d5 311 void *p_dsched_priv2;
984263bc 312/* End area that is copied on creation. */
8c72e3d5 313#define p_endcopy p_dsched_priv2
c46d7673 314 u_short p_acflag; /* Accounting flags. */
c46d7673 315
0d355d3b 316 int p_lock; /* Prevent proc destruction */
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317 int p_nthreads; /* Number of threads in this process. */
318 int p_nstopped; /* Number of stopped threads. */
319 int p_lasttid; /* Last tid used. */
3e291793 320 struct lwp_rb_tree p_lwp_tree; /* RB tree of LWPs for this process */
c46d7673 321 void *p_aioinfo; /* ASYNC I/O info */
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322 int p_wakeup; /* thread id XXX lwp */
323 struct proc *p_peers; /* XXX lwp */
324 struct proc *p_leader; /* XXX lwp */
c46d7673 325 void *p_emuldata; /* process-specific emulator state */
c46d7673 326 struct usched *p_usched; /* Userland scheduling control */
39005e16 327 struct vkernel_proc *p_vkernel; /* VKernel support, proc part */
c46d7673 328 int p_numposixlocks; /* number of POSIX locks */
8ba5f7ef 329 void (*p_userret)(void);/* p: return-to-user hook */
ef09c3ed 330
c0b8a06d 331 struct spinlock p_spin; /* Spinlock for LWP access to proc */
5686ec5a 332 struct lwkt_token p_token; /* Token for LWP access to proc */
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333};
334
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335#define lwp_wchan lwp_thread->td_wchan
336#define lwp_wmesg lwp_thread->td_wmesg
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337#define p_session p_pgrp->pg_session
338#define p_pgid p_pgrp->pg_id
339
984263bc 340/* These flags are kept in p_flags. */
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341#define P_ADVLOCK 0x00001 /* Process may hold a POSIX advisory lock */
342#define P_CONTROLT 0x00002 /* Has a controlling terminal */
344ad853 343#define P_SWAPPEDOUT 0x00004 /* Swapped out of memory */
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344#define P_UNUSED3 0x00008
345#define P_PPWAIT 0x00010 /* Parent is waiting for child to exec/exit */
346#define P_PROFIL 0x00020 /* Has started profiling */
347#define P_UNUSED5 0x00040 /* was: Selecting; wakeup/waiting danger */
348#define P_UNUSED4 0x00080 /* was: Sleep is interruptible */
349#define P_SUGID 0x00100 /* Had set id privileges since last exec */
350#define P_SYSTEM 0x00200 /* System proc: no sigs, stats or swapping */
164b8401 351#define P_UNUSED2 0x00400 /* was: SIGSTOP status */
4643740a 352#define P_TRACED 0x00800 /* Debugged process being traced */
344ad853 353#define P_WAITED 0x01000 /* SIGSTOP status was returned by wait3/4 */
e3161323 354#define P_WEXIT 0x02000 /* Working on exiting (master exit) */
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355#define P_EXEC 0x04000 /* Process called exec */
356#define P_CONTINUED 0x08000 /* Proc has continued from a stopped state */
984263bc 357
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358#define P_UNUSED16 0x00010000
359#define P_UPCALLPEND 0x00020000 /* an upcall is pending */
984263bc 360
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361#define P_SWAPWAIT 0x00040000 /* Waiting for a swapin */
362#define P_UNUSED19 0x00080000 /* was: Now in a zombied state */
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363
364/* Marked a kernel thread */
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365#define P_UNUSED20 0x00100000 /* was: on a user scheduling run queue */
366#define P_KTHREADP 0x00200000 /* Process is really a kernel thread */
367#define P_IDLESWAP 0x00400000 /* Swapout was due to idleswap, not load */
368
369#define P_JAILED 0x01000000 /* Process is in jail */
370#define P_SIGVTALRM 0x02000000 /* signal SIGVTALRM pending due to itimer */
371#define P_SIGPROF 0x04000000 /* signal SIGPROF pending due to itimer */
372#define P_INEXEC 0x08000000 /* Process is in execve(). */
373#define P_UNUSED28 0x10000000
fe8c5e17 374#define P_UPCALLWAIT 0x20000000 /* Wait for upcall or signal */
c0b8a06d 375#define P_XCPU 0x40000000 /* SIGXCPU */
984263bc 376
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377#define LWP_ALTSTACK 0x0000001 /* have alternate signal stack */
378#define LWP_OLDMASK 0x0000002 /* need to restore mask before pause */
379#define LWP_SINTR 0x0000008 /* Sleep is interruptible. */
380#define LWP_SELECT 0x0000010 /* Selecting; wakeup/waiting danger. */
381#define LWP_UNUSED20 0x0000020
382#define LWP_UNUSED40 0x0000040
383#define LWP_UNUSED80 0x0000080
384#define LWP_PASSIVE_ACQ 0x0000100 /* Passive acquire cpu (see kern_switch) */
385#define LWP_PAGING 0x0000200 /* Currently in vm_fault */
386
7a313817 387/*
4643740a 388 * LWP_MP_WSTOP: When set the thread will stop prior to return to userland
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389 * and has been counted in the process stop-threads-count, but
390 * may still be running in kernel-land.
391 *
4643740a 392 * LWP_MP_WEXIT: When set the thread has been asked to exit and will not return
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393 * to userland. p_nthreads will not be decremented until the
394 * thread has actually exited.
395 */
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396#define LWP_MP_ONRUNQ 0x0000001 /* on a user scheduling run queue */
397#define LWP_MP_WEXIT 0x0000002 /* working on exiting */
398#define LWP_MP_WSTOP 0x0000004 /* working on stopping */
08f2f1bb 399
3e291793 400#define FIRST_LWP_IN_PROC(p) RB_FIRST(lwp_rb_tree, &(p)->p_lwp_tree)
fde7ac71 401#define FOREACH_LWP_IN_PROC(lp, p) \
3e291793 402 RB_FOREACH(lp, lwp_rb_tree, &(p)->p_lwp_tree)
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403#define ONLY_LWP_IN_PROC(p) \
404 (p->p_nthreads != 1 && \
405 (panic("%s: proc %p (pid %d cmd %s) has more than one thread", \
406 __func__, p, p->p_pid, p->p_comm), 1), \
3e291793 407 RB_ROOT(&p->p_lwp_tree))
fde7ac71 408
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409/*
410 * We use process IDs <= PID_MAX; PID_MAX + 1 must also fit in a pid_t,
411 * as it is used to represent "no process group".
412 */
413#define PID_MAX 99999
414#define NO_PID 100000
415
416#define SESS_LEADER(p) ((p)->p_session->s_leader == (p))
417
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418#ifdef _KERNEL
419
420#ifdef MALLOC_DECLARE
421MALLOC_DECLARE(M_SESSION);
fb2a331e 422MALLOC_DECLARE(M_PROC);
f6c36234 423MALLOC_DECLARE(M_LWP);
984263bc 424MALLOC_DECLARE(M_SUBPROC);
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425MALLOC_DECLARE(M_PARGS);
426#endif
427
9eaf083f 428/* for priv_check_cred() */
e4700d00 429#define NULL_CRED_OKAY 0x2
984263bc 430
95db0b6a 431/* Handy macro to determine if p1 can mangle p2 */
984263bc 432
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433#define PRISON_CHECK(cr1, cr2) \
434 ((!(cr1)->cr_prison) || (cr1)->cr_prison == (cr2)->cr_prison)
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435
436/*
8a8d5d85 437 * STOPEVENT
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438 */
439extern void stopevent(struct proc*, unsigned int, unsigned int);
440#define STOPEVENT(p,e,v) \
441 do { \
442 if ((p)->p_stops & (e)) { \
984263bc 443 stopevent(p,e,v); \
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444 } \
445 } while (0)
446
0d355d3b 447/*
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448 * Hold process in memory, don't destruct, used by ktrace, procfs, sigio,
449 * and signaling code (e.g. ksignal()).
450 *
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451 * MPSAFE
452 */
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453#define PHOLD(p) phold((p))
454#define PRELE(p) prele((p))
455#define PSTALL(p, msg, n) \
456 do { if ((p)->p_lock > (n)) pstall((p), (msg), (n)); } while (0)
984263bc 457
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458/*
459 * Hold lwp in memory, don't destruct, normally for ptrace/procfs work
460 * atomic ops because they can occur from an IPI.
461 * MPSAFE
462 */
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463#define LWPHOLD(lp) atomic_add_int(&(lp)->lwp_lock, 1)
464#define LWPRELE(lp) atomic_add_int(&(lp)->lwp_lock, -1)
cc1d939b 465
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466#define PIDHASH(pid) (&pidhashtbl[(pid) & pidhash])
467extern LIST_HEAD(pidhashhead, proc) *pidhashtbl;
468extern u_long pidhash;
469
470#define PGRPHASH(pgid) (&pgrphashtbl[(pgid) & pgrphash])
471extern LIST_HEAD(pgrphashhead, pgrp) *pgrphashtbl;
472extern u_long pgrphash;
473
8c72e3d5 474#if 0
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475#ifndef SET_CURPROC
476#define SET_CURPROC(p) (curproc = (p))
477#endif
984263bc 478#endif
84b592ba 479
984263bc 480extern struct proc proc0; /* Process slot for swapper. */
08f2f1bb 481extern struct lwp lwp0; /* LWP slot for swapper. */
b7c628e4 482extern struct thread thread0; /* Thread slot for swapper. */
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483extern int hogticks; /* Limit on kernel cpu hogs. */
484extern int nprocs, maxproc; /* Current and max number of procs. */
485extern int maxprocperuid; /* Max procs per uid. */
486extern int sched_quantum; /* Scheduling quantum in ticks */
487
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488extern struct proclist allproc; /* List of all processes. */
489extern struct proclist zombproc; /* List of zombie processes. */
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490extern struct proc *initproc; /* Process slot for init */
491extern struct thread *pagethread, *updatethread;
984263bc 492
984263bc 493/*
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494 * Scheduler independant variables. The primary scheduler polling frequency,
495 * the maximum ESTCPU value, and the weighting factor for nice values. A
496 * cpu bound program's estcpu will increase to ESTCPUMAX - 1.
984263bc 497 */
a46fac56 498#define ESTCPUFREQ 50
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499
500extern u_long ps_arg_cache_limit;
501extern int ps_argsopen;
28c57d20 502extern int ps_showallprocs;
984263bc 503
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504struct proc *pfind (pid_t); /* Find process by id w/ref */
505struct proc *pfindn (pid_t); /* Find process by id wo/ref */
506struct pgrp *pgfind (pid_t); /* Find process group by id w/ref */
507struct proc *zpfind (pid_t); /* Find zombie process by id w/ref */
508void pgref (struct pgrp *); /* Ref pgrp preventing disposal */
509void pgrel (struct pgrp *); /* Deref pgrp & dispose on 1->0 trans */
984263bc 510
a2a5ad0d 511struct globaldata;
91bd9c1e 512struct lwp_params;
984263bc 513
b153f746 514int enterpgrp (struct proc *p, pid_t pgid, int mksess);
51e64ff2 515void proc_add_allproc(struct proc *p);
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516void proc_move_allproc_zombie(struct proc *);
517void proc_remove_zombie(struct proc *);
518void allproc_scan(int (*callback)(struct proc *, void *), void *data);
c7e98b2f 519void alllwp_scan(int (*callback)(struct lwp *, void *), void *data);
5bf0d9b5 520void zombproc_scan(int (*callback)(struct proc *, void *), void *data);
b153f746 521void fixjobc (struct proc *p, struct pgrp *pgrp, int entering);
553ea3c8 522void updatepcpu(struct lwp *, int, int);
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523int inferior (struct proc *p);
524int leavepgrp (struct proc *p);
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525void sess_hold(struct session *sp);
526void sess_rele(struct session *sp);
b153f746 527void procinit (void);
26a0694b 528void relscurproc(struct proc *curp);
b153f746 529int p_trespass (struct ucred *cr1, struct ucred *cr2);
9a379a4a 530void setrunnable (struct lwp *);
f33e8653 531void proc_stop (struct proc *);
9a379a4a 532void proc_unstop (struct proc *);
fc17ad60 533void sleep_gdinit (struct globaldata *);
b153f746 534int suser (struct thread *td);
b153f746 535int suser_cred (struct ucred *cred, int flag);
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536thread_t cpu_heavy_switch (struct thread *);
537thread_t cpu_lwkt_switch (struct thread *);
b153f746 538
c6880072 539void cpu_lwp_exit (void) __dead2;
b153f746 540void cpu_thread_exit (void) __dead2;
e3161323 541void lwp_exit (int masterexit) __dead2;
c6880072 542void lwp_dispose (struct lwp *);
dc52e1cc 543int killalllwps (int);
b153f746 544void exit1 (int) __dead2;
bb3cd951 545void cpu_fork (struct lwp *, struct lwp *, int);
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546int cpu_prepare_lwp(struct lwp *, struct lwp_params *);
547void cpu_set_fork_handler (struct lwp *, void (*)(void *, struct trapframe *), void *);
0cfcada1 548void cpu_set_thread_handler(struct thread *td, void (*retfunc)(void), void *func, void *arg);
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549int fork1 (struct lwp *, int, struct proc **);
550void start_forked_proc (struct lwp *, struct proc *);
b153f746 551int trace_req (struct proc *);
b153f746 552void cpu_thread_wait (struct thread *);
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553void setsugid (void);
554void faultin (struct proc *p);
344ad853 555void swapin_request (void);
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556void phold (struct proc *);
557void prele (struct proc *);
558void pstall (struct proc *, const char *, int);
984263bc 559
b153f746 560u_int32_t procrunnable (void);
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561
562#endif /* _KERNEL */
563
03d6a592 564#endif /* _KERNEL || _KERNEL_STRUCTURES */
984263bc 565#endif /* !_SYS_PROC_H_ */