FreeBSD/Linux Kernel Cross Reference
sys/sys/proc.h
1 /* $OpenBSD: proc.h,v 1.339 2023/01/16 07:09:11 guenther Exp $ */
2 /* $NetBSD: proc.h,v 1.44 1996/04/22 01:23:21 christos Exp $ */
3
4 /*-
5 * Copyright (c) 1986, 1989, 1991, 1993
6 * The Regents of the University of California. All rights reserved.
7 * (c) UNIX System Laboratories, Inc.
8 * All or some portions of this file are derived from material licensed
9 * to the University of California by American Telephone and Telegraph
10 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
11 * the permission of UNIX System Laboratories, Inc.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 *
37 * @(#)proc.h 8.8 (Berkeley) 1/21/94
38 */
39
40 #ifndef _SYS_PROC_H_
41 #define _SYS_PROC_H_
42
43 #include <machine/proc.h> /* Machine-dependent proc substruct. */
44 #include <sys/selinfo.h> /* For struct selinfo */
45 #include <sys/syslimits.h> /* For LOGIN_NAME_MAX */
46 #include <sys/queue.h>
47 #include <sys/timeout.h> /* For struct timeout */
48 #include <sys/event.h> /* For struct klist */
49 #include <sys/mutex.h> /* For struct mutex */
50 #include <sys/resource.h> /* For struct rusage */
51 #include <sys/rwlock.h> /* For struct rwlock */
52 #include <sys/sigio.h> /* For struct sigio */
53
54 #ifdef _KERNEL
55 #include <sys/atomic.h>
56 #define __need_process
57 #endif
58
59 /*
60 * One structure allocated per session.
61 */
62 struct process;
63 struct session {
64 int s_count; /* Ref cnt; pgrps in session. */
65 struct process *s_leader; /* Session leader. */
66 struct vnode *s_ttyvp; /* Vnode of controlling terminal. */
67 struct tty *s_ttyp; /* Controlling terminal. */
68 char s_login[LOGIN_NAME_MAX]; /* Setlogin() name. */
69 pid_t s_verauthppid;
70 uid_t s_verauthuid;
71 struct timeout s_verauthto;
72 };
73
74 void zapverauth(/* struct session */ void *);
75
76 /*
77 * One structure allocated per process group.
78 */
79 struct pgrp {
80 LIST_ENTRY(pgrp) pg_hash; /* Hash chain. */
81 LIST_HEAD(, process) pg_members;/* Pointer to pgrp members. */
82 struct session *pg_session; /* Pointer to session. */
83 struct sigiolst pg_sigiolst; /* List of sigio structures. */
84 pid_t pg_id; /* Pgrp id. */
85 int pg_jobc; /* # procs qualifying pgrp for job control */
86 };
87
88 /*
89 * time usage: accumulated times in ticks
90 * Once a second, each thread's immediate counts (p_[usi]ticks) are
91 * accumulated into these.
92 */
93 struct tusage {
94 struct timespec tu_runtime; /* Realtime. */
95 uint64_t tu_uticks; /* Statclock hits in user mode. */
96 uint64_t tu_sticks; /* Statclock hits in system mode. */
97 uint64_t tu_iticks; /* Statclock hits processing intr. */
98 };
99
100 /*
101 * Description of a process.
102 *
103 * These structures contain the information needed to manage a thread of
104 * control, known in UN*X as a process; it has references to substructures
105 * containing descriptions of things that the process uses, but may share
106 * with related processes.
107 *
108 * struct process is the higher level process containing information
109 * shared by all threads in a process, while struct proc contains the
110 * run-time information needed by threads.
111 */
112 #ifdef __need_process
113 struct futex;
114 LIST_HEAD(futex_list, futex);
115 struct proc;
116 struct tslpentry;
117 TAILQ_HEAD(tslpqueue, tslpentry);
118 struct unveil;
119
120 /*
121 * Locks used to protect struct members in this file:
122 * I immutable after creation
123 * a atomic operations
124 * K kernel lock
125 * m this process' `ps_mtx'
126 * p this process' `ps_lock'
127 * R rlimit_lock
128 * S scheduler lock
129 * T itimer_mtx
130 */
131 struct process {
132 /*
133 * ps_mainproc is the original thread in the process.
134 * It's only still special for the handling of
135 * some signal and ptrace behaviors that need to be fixed.
136 */
137 struct proc *ps_mainproc;
138 struct ucred *ps_ucred; /* Process owner's identity. */
139
140 LIST_ENTRY(process) ps_list; /* List of all processes. */
141 TAILQ_HEAD(,proc) ps_threads; /* [K|S] Threads in this process. */
142
143 LIST_ENTRY(process) ps_pglist; /* List of processes in pgrp. */
144 struct process *ps_pptr; /* Pointer to parent process. */
145 LIST_ENTRY(process) ps_sibling; /* List of sibling processes. */
146 LIST_HEAD(, process) ps_children;/* Pointer to list of children. */
147 LIST_ENTRY(process) ps_hash; /* Hash chain. */
148
149 /*
150 * An orphan is the child that has been re-parented to the
151 * debugger as a result of attaching to it. Need to keep
152 * track of them for parent to be able to collect the exit
153 * status of what used to be children.
154 */
155 LIST_ENTRY(process) ps_orphan; /* List of orphan processes. */
156 LIST_HEAD(, process) ps_orphans;/* Pointer to list of orphans. */
157
158 struct sigiolst ps_sigiolst; /* List of sigio structures. */
159 struct sigacts *ps_sigacts; /* [I] Signal actions, state */
160 struct vnode *ps_textvp; /* Vnode of executable. */
161 struct filedesc *ps_fd; /* Ptr to open files structure */
162 struct vmspace *ps_vmspace; /* Address space */
163 pid_t ps_pid; /* Process identifier. */
164
165 struct futex_list ps_ftlist; /* futexes attached to this process */
166 struct tslpqueue ps_tslpqueue; /* [p] queue of threads in thrsleep */
167 struct rwlock ps_lock; /* per-process rwlock */
168 struct mutex ps_mtx; /* per-process mutex */
169
170 /* The following fields are all zeroed upon creation in process_new. */
171 #define ps_startzero ps_klist
172 struct klist ps_klist; /* knotes attached to this process */
173 u_int ps_flags; /* [a] PS_* flags. */
174 int ps_siglist; /* Signals pending for the process. */
175
176 struct proc *ps_single; /* [S] Thread for single-threading. */
177 u_int ps_singlecount; /* [a] Not yet suspended threads. */
178
179 int ps_traceflag; /* Kernel trace points. */
180 struct vnode *ps_tracevp; /* Trace to vnode. */
181 struct ucred *ps_tracecred; /* Creds for writing trace */
182
183 u_int ps_xexit; /* Exit status for wait */
184 int ps_xsig; /* Stopping or killing signal */
185
186 pid_t ps_ppid; /* [a] Cached parent pid */
187 pid_t ps_oppid; /* [a] Save parent pid during ptrace. */
188 int ps_ptmask; /* Ptrace event mask */
189 struct ptrace_state *ps_ptstat;/* Ptrace state */
190
191 struct rusage *ps_ru; /* sum of stats for dead threads. */
192 struct tusage ps_tu; /* accumulated times. */
193 struct rusage ps_cru; /* sum of stats for reaped children */
194 struct itimerspec ps_timer[3]; /* [m] ITIMER_REAL timer */
195 /* [T] ITIMER_{VIRTUAL,PROF} timers */
196 struct timeout ps_rucheck_to; /* [] resource limit check timer */
197 time_t ps_nextxcpu; /* when to send next SIGXCPU, */
198 /* in seconds of process runtime */
199
200 u_int64_t ps_wxcounter;
201
202 struct unveil *ps_uvpaths; /* unveil vnodes and names */
203 ssize_t ps_uvvcount; /* count of unveil vnodes held */
204 size_t ps_uvncount; /* count of unveil names allocated */
205 int ps_uvdone; /* no more unveil is permitted */
206
207 /* End area that is zeroed on creation. */
208 #define ps_endzero ps_startcopy
209
210 /* The following fields are all copied upon creation in process_new. */
211 #define ps_startcopy ps_limit
212 struct plimit *ps_limit; /* [m,R] Process limits. */
213 struct pgrp *ps_pgrp; /* Pointer to process group. */
214
215 char ps_comm[_MAXCOMLEN]; /* command name, incl NUL */
216
217 vaddr_t ps_strings; /* User pointers to argv/env */
218 vaddr_t ps_auxinfo; /* User pointer to auxinfo */
219 vaddr_t ps_timekeep; /* User pointer to timekeep */
220 vaddr_t ps_sigcode; /* [I] User pointer to signal code */
221 vaddr_t ps_sigcoderet; /* [I] User ptr to sigreturn retPC */
222 u_long ps_sigcookie; /* [I] */
223 u_int ps_rtableid; /* [a] Process routing table/domain. */
224 char ps_nice; /* Process "nice" value. */
225
226 struct uprof { /* profile arguments */
227 caddr_t pr_base; /* buffer base */
228 size_t pr_size; /* buffer size */
229 u_long pr_off; /* pc offset */
230 u_int pr_scale; /* pc scaling */
231 } ps_prof;
232
233 u_int32_t ps_acflag; /* Accounting flags. */
234
235 uint64_t ps_pledge; /* [m] pledge promises */
236 uint64_t ps_execpledge; /* [m] execpledge promises */
237
238 int64_t ps_kbind_cookie; /* [m] */
239 u_long ps_kbind_addr; /* [m] */
240 /* an address that can't be in userspace or kernelspace */
241 #define BOGO_PC (u_long)-1
242
243 /* End area that is copied on creation. */
244 #define ps_endcopy ps_refcnt
245 int ps_refcnt; /* Number of references. */
246
247 struct timespec ps_start; /* starting uptime. */
248 struct timeout ps_realit_to; /* [m] ITIMER_REAL timeout */
249 };
250
251 #define ps_session ps_pgrp->pg_session
252 #define ps_pgid ps_pgrp->pg_id
253
254 #endif /* __need_process */
255
256 /*
257 * These flags are kept in ps_flags.
258 */
259 #define PS_CONTROLT 0x00000001 /* Has a controlling terminal. */
260 #define PS_EXEC 0x00000002 /* Process called exec. */
261 #define PS_INEXEC 0x00000004 /* Process is doing an exec right now */
262 #define PS_EXITING 0x00000008 /* Process is exiting. */
263 #define PS_SUGID 0x00000010 /* Had set id privs since last exec. */
264 #define PS_SUGIDEXEC 0x00000020 /* last execve() was set[ug]id */
265 #define PS_PPWAIT 0x00000040 /* Parent waits for exec/exit. */
266 #define PS_ISPWAIT 0x00000080 /* Is parent of PPWAIT child. */
267 #define PS_PROFIL 0x00000100 /* Has started profiling. */
268 #define PS_TRACED 0x00000200 /* Being ptraced. */
269 #define PS_WAITED 0x00000400 /* Stopped proc was waited for. */
270 #define PS_COREDUMP 0x00000800 /* Busy coredumping */
271 #define PS_SINGLEEXIT 0x00001000 /* Other threads must die. */
272 #define PS_SINGLEUNWIND 0x00002000 /* Other threads must unwind. */
273 #define PS_NOZOMBIE 0x00004000 /* No signal or zombie at exit. */
274 #define PS_STOPPED 0x00008000 /* Just stopped, need sig to parent. */
275 #define PS_SYSTEM 0x00010000 /* No sigs, stats or swapping. */
276 #define PS_EMBRYO 0x00020000 /* New process, not yet fledged */
277 #define PS_ZOMBIE 0x00040000 /* Dead and ready to be waited for */
278 #define PS_NOBROADCASTKILL 0x00080000 /* Process excluded from kill -1. */
279 #define PS_PLEDGE 0x00100000 /* Has called pledge(2) */
280 #define PS_WXNEEDED 0x00200000 /* Process allowed to violate W^X */
281 #define PS_EXECPLEDGE 0x00400000 /* Has exec pledges */
282 #define PS_ORPHAN 0x00800000 /* Process is on an orphan list */
283 #define PS_CHROOT 0x01000000 /* Process is chrooted */
284
285 #define PS_BITS \
286 ("\2" "\01CONTROLT" "\02EXEC" "\03INEXEC" "\04EXITING" "\05SUGID" \
287 "\06SUGIDEXEC" "\07PPWAIT" "\010ISPWAIT" "\011PROFIL" "\012TRACED" \
288 "\013WAITED" "\014COREDUMP" "\015SINGLEEXIT" "\016SINGLEUNWIND" \
289 "\017NOZOMBIE" "\020STOPPED" "\021SYSTEM" "\022EMBRYO" "\023ZOMBIE" \
290 "\024NOBROADCASTKILL" "\025PLEDGE" "\026WXNEEDED" "\027EXECPLEDGE" \
291 "\030ORPHAN" "\031CHROOT")
292
293
294 struct kcov_dev;
295 struct lock_list_entry;
296 struct kqueue;
297
298 struct p_inentry {
299 u_long ie_serial;
300 vaddr_t ie_start;
301 vaddr_t ie_end;
302 };
303
304 /*
305 * Locks used to protect struct members in this file:
306 * I immutable after creation
307 * S scheduler lock
308 * U uidinfolk
309 * l read only reference, see lim_read_enter()
310 * o owned (read/modified only) by this thread
311 */
312 struct proc {
313 TAILQ_ENTRY(proc) p_runq; /* [S] current run/sleep queue */
314 LIST_ENTRY(proc) p_list; /* List of all threads. */
315
316 struct process *p_p; /* [I] The process of this thread. */
317 TAILQ_ENTRY(proc) p_thr_link; /* Threads in a process linkage. */
318
319 TAILQ_ENTRY(proc) p_fut_link; /* Threads in a futex linkage. */
320 struct futex *p_futex; /* Current sleeping futex. */
321
322 /* substructures: */
323 struct filedesc *p_fd; /* copy of p_p->ps_fd */
324 struct vmspace *p_vmspace; /* [I] copy of p_p->ps_vmspace */
325 struct p_inentry p_spinentry; /* [o] cache for SP check */
326 struct p_inentry p_pcinentry; /* [o] cache for PC check */
327
328 int p_flag; /* P_* flags. */
329 u_char p_spare; /* unused */
330 char p_stat; /* [S] S* process status. */
331 u_char p_runpri; /* [S] Runqueue priority */
332 u_char p_descfd; /* if not 255, fdesc permits this fd */
333
334 pid_t p_tid; /* Thread identifier. */
335 LIST_ENTRY(proc) p_hash; /* Hash chain. */
336
337 /* The following fields are all zeroed upon creation in fork. */
338 #define p_startzero p_dupfd
339 int p_dupfd; /* Sideways return value from filedescopen. XXX */
340
341 /* scheduling */
342 int p_cpticks; /* Ticks of cpu time. */
343 const volatile void *p_wchan; /* [S] Sleep address. */
344 struct timeout p_sleep_to;/* timeout for tsleep() */
345 const char *p_wmesg; /* [S] Reason for sleep. */
346 fixpt_t p_pctcpu; /* [S] %cpu for this thread */
347 u_int p_slptime; /* [S] Time since last blocked. */
348 u_int p_uticks; /* Statclock hits in user mode. */
349 u_int p_sticks; /* Statclock hits in system mode. */
350 u_int p_iticks; /* Statclock hits processing intr. */
351 struct cpu_info * volatile p_cpu; /* [S] CPU we're running on. */
352
353 struct rusage p_ru; /* Statistics */
354 struct tusage p_tu; /* accumulated times. */
355 struct timespec p_rtime; /* Real time. */
356
357 struct plimit *p_limit; /* [l] read ref. of p_p->ps_limit */
358 struct kcov_dev *p_kd; /* kcov device handle */
359 struct lock_list_entry *p_sleeplocks; /* WITNESS lock tracking */
360 struct kqueue *p_kq; /* [o] select/poll queue of evts */
361 unsigned long p_kq_serial; /* [o] to check against enqueued evts */
362
363 int p_siglist; /* [a] Signals arrived & not delivered*/
364
365 /* End area that is zeroed on creation. */
366 #define p_endzero p_startcopy
367
368 /* The following fields are all copied upon creation in fork. */
369 #define p_startcopy p_sigmask
370 sigset_t p_sigmask; /* [a] Current signal mask */
371
372 char p_name[_MAXCOMLEN]; /* thread name, incl NUL */
373 u_char p_slppri; /* [S] Sleeping priority */
374 u_char p_usrpri; /* [S] Priority based on p_estcpu & ps_nice */
375 u_int p_estcpu; /* [S] Time averaged val of p_cpticks */
376 int p_pledge_syscall; /* Cache of current syscall */
377
378 struct ucred *p_ucred; /* [o] cached credentials */
379 struct sigaltstack p_sigstk; /* sp & on stack state variable */
380
381 u_long p_prof_addr; /* tmp storage for profiling addr until AST */
382 u_long p_prof_ticks; /* tmp storage for profiling ticks until AST */
383
384 /* End area that is copied on creation. */
385 #define p_endcopy p_addr
386 struct user *p_addr; /* Kernel virtual addr of u-area */
387 struct mdproc p_md; /* Any machine-dependent fields. */
388
389 sigset_t p_oldmask; /* Saved mask from before sigpause */
390 int p_sisig; /* For core dump/debugger XXX */
391 union sigval p_sigval; /* For core dump/debugger XXX */
392 long p_sitrapno; /* For core dump/debugger XXX */
393 int p_sicode; /* For core dump/debugger XXX */
394 };
395
396 /* Status values. */
397 #define SIDL 1 /* Thread being created by fork. */
398 #define SRUN 2 /* Currently runnable. */
399 #define SSLEEP 3 /* Sleeping on an address. */
400 #define SSTOP 4 /* Debugging or suspension. */
401 #define SZOMB 5 /* unused */
402 #define SDEAD 6 /* Thread is almost gone */
403 #define SONPROC 7 /* Thread is currently on a CPU. */
404
405 #define P_ZOMBIE(p) ((p)->p_stat == SDEAD)
406 #define P_HASSIBLING(p) (TAILQ_FIRST(&(p)->p_p->ps_threads) != (p) || \
407 TAILQ_NEXT((p), p_thr_link) != NULL)
408
409 /*
410 * These flags are per-thread and kept in p_flag
411 */
412 #define P_INKTR 0x00000001 /* In a ktrace op, don't recurse */
413 #define P_PROFPEND 0x00000002 /* SIGPROF needs to be posted */
414 #define P_ALRMPEND 0x00000004 /* SIGVTALRM needs to be posted */
415 #define P_SIGSUSPEND 0x00000008 /* Need to restore before-suspend mask*/
416 #define P_CANTSLEEP 0x00000010 /* insomniac thread */
417 #define P_SINTR 0x00000080 /* Sleep is interruptible. */
418 #define P_SYSTEM 0x00000200 /* No sigs, stats or swapping. */
419 #define P_TIMEOUT 0x00000400 /* Timing out during sleep. */
420 #define P_WEXIT 0x00002000 /* Working on exiting. */
421 #define P_OWEUPC 0x00008000 /* Owe proc an addupc() at next ast. */
422 #define P_SUSPSINGLE 0x00080000 /* Need to stop for single threading. */
423 #define P_CONTINUED 0x00800000 /* Proc has continued from a stopped state. */
424 #define P_THREAD 0x04000000 /* Only a thread, not a real process */
425 #define P_SUSPSIG 0x08000000 /* Stopped from signal. */
426 #define P_SOFTDEP 0x10000000 /* Stuck processing softdep worklist */
427 #define P_CPUPEG 0x40000000 /* Do not move to another cpu. */
428
429 #define P_BITS \
430 ("\2" "\01INKTR" "\02PROFPEND" "\03ALRMPEND" "\04SIGSUSPEND" \
431 "\05CANTSLEEP" "\010SINTR" "\012SYSTEM" "\013TIMEOUT" \
432 "\016WEXIT" "\020OWEUPC" "\024SUSPSINGLE" "\027XX" \
433 "\030CONTINUED" "\033THREAD" "\034SUSPSIG" "\035SOFTDEP" "\037CPUPEG")
434
435 #define THREAD_PID_OFFSET 100000
436
437 #ifdef _KERNEL
438
439 struct uidinfo {
440 LIST_ENTRY(uidinfo) ui_hash; /* [U] */
441 uid_t ui_uid; /* [I] */
442 long ui_proccnt; /* [U] proc structs */
443 long ui_lockcnt; /* [U] lockf structs */
444 };
445
446 struct uidinfo *uid_find(uid_t);
447 void uid_release(struct uidinfo *);
448
449 /*
450 * We use process IDs <= PID_MAX; PID_MAX + 1 must also fit in a pid_t,
451 * as it is used to represent "no process group".
452 * We set PID_MAX to 99999 to keep it in 5 columns in ps
453 * When exposed to userspace, thread IDs have THREAD_PID_OFFSET
454 * added to keep them from overlapping the PID range. For them,
455 * we use a * a (0 .. 2^n] range for cheapness, picking 'n' such
456 * that 2^n + THREAD_PID_OFFSET and THREAD_PID_OFFSET have
457 * the same number of columns when printed.
458 */
459 #define PID_MAX 99999
460 #define TID_MASK 0x7ffff
461
462 #define NO_PID (PID_MAX+1)
463
464 #define SESS_LEADER(pr) ((pr)->ps_session->s_leader == (pr))
465 #define SESSHOLD(s) ((s)->s_count++)
466 #define SESSRELE(s) do { \
467 if (--(s)->s_count == 0) { \
468 timeout_del(&(s)->s_verauthto); \
469 pool_put(&session_pool, (s)); \
470 } \
471 } while (/* CONSTCOND */ 0)
472
473 /*
474 * Flags to fork1().
475 */
476 #define FORK_FORK 0x00000001
477 #define FORK_VFORK 0x00000002
478 #define FORK_IDLE 0x00000004
479 #define FORK_PPWAIT 0x00000008
480 #define FORK_SHAREFILES 0x00000010
481 #define FORK_SYSTEM 0x00000020
482 #define FORK_NOZOMBIE 0x00000040
483 #define FORK_SHAREVM 0x00000080
484 #define FORK_PTRACE 0x00000400
485
486 #define EXIT_NORMAL 0x00000001
487 #define EXIT_THREAD 0x00000002
488 #define EXIT_THREAD_NOCHECK 0x00000003
489
490 #define TIDHASH(tid) (&tidhashtbl[(tid) & tidhash])
491 extern LIST_HEAD(tidhashhead, proc) *tidhashtbl;
492 extern u_long tidhash;
493
494 #define PIDHASH(pid) (&pidhashtbl[(pid) & pidhash])
495 extern LIST_HEAD(pidhashhead, process) *pidhashtbl;
496 extern u_long pidhash;
497
498 #define PGRPHASH(pgid) (&pgrphashtbl[(pgid) & pgrphash])
499 extern LIST_HEAD(pgrphashhead, pgrp) *pgrphashtbl;
500 extern u_long pgrphash;
501
502 extern struct proc proc0; /* Process slot for swapper. */
503 extern struct process process0; /* Process slot for kernel threads. */
504 extern int nprocesses, maxprocess; /* Cur and max number of processes. */
505 extern int nthreads, maxthread; /* Cur and max number of threads. */
506
507 LIST_HEAD(proclist, proc);
508 LIST_HEAD(processlist, process);
509 extern struct processlist allprocess; /* List of all processes. */
510 extern struct processlist zombprocess; /* List of zombie processes. */
511 extern struct proclist allproc; /* List of all threads. */
512
513 extern struct process *initprocess; /* Process slot for init. */
514 extern struct proc *reaperproc; /* Thread slot for reaper. */
515 extern struct proc *syncerproc; /* filesystem syncer daemon */
516
517 extern struct pool process_pool; /* memory pool for processes */
518 extern struct pool proc_pool; /* memory pool for procs */
519 extern struct pool rusage_pool; /* memory pool for zombies */
520 extern struct pool ucred_pool; /* memory pool for ucreds */
521 extern struct pool session_pool; /* memory pool for sessions */
522 extern struct pool pgrp_pool; /* memory pool for pgrps */
523
524 void freepid(pid_t);
525
526 struct process *prfind(pid_t); /* Find process by id. */
527 struct process *zombiefind(pid_t); /* Find zombie process by id. */
528 struct proc *tfind(pid_t); /* Find thread by id. */
529 struct pgrp *pgfind(pid_t); /* Find process group by id. */
530 struct proc *tfind_user(pid_t, struct process *);
531 /* Find thread by userspace id. */
532 void proc_printit(struct proc *p, const char *modif,
533 int (*pr)(const char *, ...));
534
535 int chgproccnt(uid_t uid, int diff);
536 void enternewpgrp(struct process *, struct pgrp *, struct session *);
537 void enterthispgrp(struct process *, struct pgrp *);
538 int inferior(struct process *, struct process *);
539 void leavepgrp(struct process *);
540 void killjobc(struct process *);
541 void preempt(void);
542 void procinit(void);
543 void setpriority(struct proc *, uint32_t, uint8_t);
544 void setrunnable(struct proc *);
545 void endtsleep(void *);
546 int wakeup_proc(struct proc *, const volatile void *);
547 void unsleep(struct proc *);
548 void reaper(void *);
549 __dead void exit1(struct proc *, int, int, int);
550 void exit2(struct proc *);
551 int dowait4(struct proc *, pid_t, int *, int, struct rusage *,
552 register_t *);
553 void cpu_fork(struct proc *_curp, struct proc *_child, void *_stack,
554 void *_tcb, void (*_func)(void *), void *_arg);
555 void cpu_exit(struct proc *);
556 void process_initialize(struct process *, struct proc *);
557 int fork1(struct proc *_curp, int _flags, void (*_func)(void *),
558 void *_arg, register_t *_retval, struct proc **_newprocp);
559 int thread_fork(struct proc *_curp, void *_stack, void *_tcb,
560 pid_t *_tidptr, register_t *_retval);
561 int groupmember(gid_t, struct ucred *);
562 void dorefreshcreds(struct process *, struct proc *);
563 void dosigsuspend(struct proc *, sigset_t);
564
565 static inline void
566 refreshcreds(struct proc *p)
567 {
568 struct process *pr = p->p_p;
569
570 /* this is an unlocked access to ps_ucred, but the result is benign */
571 if (pr->ps_ucred != p->p_ucred)
572 dorefreshcreds(pr, p);
573 }
574
575 enum single_thread_mode {
576 SINGLE_SUSPEND, /* other threads to stop wherever they are */
577 SINGLE_UNWIND, /* other threads to unwind and stop */
578 SINGLE_EXIT /* other threads to unwind and then exit */
579 };
580 int single_thread_set(struct proc *, enum single_thread_mode, int);
581 int single_thread_wait(struct process *, int);
582 void single_thread_clear(struct proc *, int);
583 int single_thread_check(struct proc *, int);
584
585 void child_return(void *);
586
587 int proc_cansugid(struct proc *);
588
589 struct sleep_state {
590 int sls_s;
591 int sls_catch;
592 int sls_timeout;
593 };
594
595 struct cond {
596 unsigned int c_wait; /* [a] initialized and waiting */
597 };
598
599 #define COND_INITIALIZER() { .c_wait = 1 }
600
601 #if defined(MULTIPROCESSOR)
602 void proc_trampoline_mp(void); /* XXX */
603 #endif
604
605 /*
606 * functions to handle sets of cpus.
607 *
608 * For now we keep the cpus in ints so that we can use the generic
609 * atomic ops.
610 */
611 #define CPUSET_ASIZE(x) (((x) - 1)/32 + 1)
612 #define CPUSET_SSIZE CPUSET_ASIZE(MAXCPUS)
613 struct cpuset {
614 int cs_set[CPUSET_SSIZE];
615 };
616
617 void cpuset_init_cpu(struct cpu_info *);
618
619 void cpuset_clear(struct cpuset *);
620 void cpuset_add(struct cpuset *, struct cpu_info *);
621 void cpuset_del(struct cpuset *, struct cpu_info *);
622 int cpuset_isset(struct cpuset *, struct cpu_info *);
623 void cpuset_add_all(struct cpuset *);
624 void cpuset_copy(struct cpuset *, struct cpuset *);
625 void cpuset_union(struct cpuset *, struct cpuset *, struct cpuset *);
626 void cpuset_intersection(struct cpuset *t, struct cpuset *, struct cpuset *);
627 void cpuset_complement(struct cpuset *, struct cpuset *, struct cpuset *);
628 int cpuset_cardinality(struct cpuset *);
629 struct cpu_info *cpuset_first(struct cpuset *);
630
631 #endif /* _KERNEL */
632 #endif /* !_SYS_PROC_H_ */
633
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