Change sendfile() to use the new m_ext callback scheme for cleaning up after
[dragonfly.git] / sys / sys / proc.h
CommitLineData
984263bc
MD
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 $
8ec60c3f 40 * $DragonFly: src/sys/sys/proc.h,v 1.53 2004/07/24 20:21:35 dillon Exp $
984263bc
MD
41 */
42
43#ifndef _SYS_PROC_H_
44#define _SYS_PROC_H_
45
05220613
MD
46#if !defined(_KERNEL) && !defined(_KERNEL_STRUCTURES)
47#error "Userland must include sys/user.h instead of sys/proc.h"
48#endif
49
984263bc
MD
50#include <sys/callout.h> /* For struct callout_handle. */
51#include <sys/filedesc.h>
52#include <sys/queue.h>
53#include <sys/rtprio.h> /* For struct rtprio. */
54#include <sys/signal.h>
55#ifndef _KERNEL
56#include <sys/time.h> /* For structs itimerval, timeval. */
57#endif
58#include <sys/ucred.h>
59#include <sys/event.h> /* For struct klist */
84b592ba 60#include <sys/thread.h>
98a7f915 61#include <sys/varsym.h>
a722be49 62#include <sys/upcall.h>
ec12abe0 63#ifdef _KERNEL
a2a5ad0d 64#include <sys/globaldata.h>
ec12abe0 65#endif
3020e3be 66#include <machine/proc.h> /* Machine-dependent proc substruct. */
84b592ba 67
984263bc
MD
68/*
69 * One structure allocated per session.
70 */
71struct session {
72 int s_count; /* Ref cnt; pgrps in session. */
73 struct proc *s_leader; /* Session leader. */
74 struct vnode *s_ttyvp; /* Vnode of controlling terminal. */
75 struct tty *s_ttyp; /* Controlling terminal. */
76 pid_t s_sid; /* Session ID */
77 char s_login[roundup(MAXLOGNAME, sizeof(long))]; /* Setlogin() name. */
78};
79
80/*
81 * One structure allocated per process group.
82 */
83struct pgrp {
84 LIST_ENTRY(pgrp) pg_hash; /* Hash chain. */
85 LIST_HEAD(, proc) pg_members; /* Pointer to pgrp members. */
86 struct session *pg_session; /* Pointer to session. */
87 struct sigiolst pg_sigiolst; /* List of sigio sources. */
88 pid_t pg_id; /* Pgrp id. */
89 int pg_jobc; /* # procs qualifying pgrp for job control */
90};
91
92struct procsig {
93 sigset_t ps_sigignore; /* Signals being ignored. */
94 sigset_t ps_sigcatch; /* Signals being caught by user. */
95 int ps_flag;
96 struct sigacts *ps_sigacts;
97 int ps_refcnt;
98};
99
100#define PS_NOCLDWAIT 0x0001 /* No zombies if child dies */
101#define PS_NOCLDSTOP 0x0002 /* No SIGCHLD when children stop. */
102
984263bc
MD
103/*
104 * pargs, used to hold a copy of the command line, if it had a sane
105 * length
106 */
107struct pargs {
108 u_int ar_ref; /* Reference count */
109 u_int ar_length; /* Length */
110 u_char ar_args[0]; /* Arguments */
111};
112
113/*
114 * Description of a process.
115 *
116 * This structure contains the information needed to manage a thread of
117 * control, known in UN*X as a process; it has references to substructures
118 * containing descriptions of things that the process uses, but may share
119 * with related processes. The process structure and the substructures
120 * are always addressable except for those marked "(PROC ONLY)" below,
121 * which might be addressable only on a processor on which the process
122 * is running.
41f3429e
HP
123 *
124 * NOTE! The process start time is stored in the thread structure associated
125 * with the process. If the process is a Zombie, then this field will be
126 * inaccessible due to the thread structure being free'd in kern_wait1().
984263bc
MD
127 */
128
129struct jail;
70293ea5 130struct sched;
984263bc
MD
131
132struct proc {
133 TAILQ_ENTRY(proc) p_procq; /* run/sleep queue. */
134 LIST_ENTRY(proc) p_list; /* List of all processes. */
135
136 /* substructures: */
41c20dac 137 struct ucred *p_ucred; /* Process owner's identity. */
984263bc
MD
138 struct filedesc *p_fd; /* Ptr to open files structure. */
139 struct filedesc_to_leader *p_fdtol; /* Ptr to tracking node */
140 struct pstats *p_stats; /* Accounting/statistics (PROC ONLY). */
141 struct plimit *p_limit; /* Process limits. */
7e1d4bf4 142#if 0
984263bc 143 struct vm_object *p_upages_obj;/* Upages object */
7e1d4bf4
MD
144#else
145 void *p_dummy1;
146#endif
984263bc
MD
147 struct procsig *p_procsig;
148#define p_sigacts p_procsig->ps_sigacts
149#define p_sigignore p_procsig->ps_sigignore
150#define p_sigcatch p_procsig->ps_sigcatch
984263bc
MD
151#define p_rlimit p_limit->pl_rlimit
152
153 int p_flag; /* P_* flags. */
154 char p_stat; /* S* process status. */
155 char p_pad1[3];
156
157 pid_t p_pid; /* Process identifier. */
158 LIST_ENTRY(proc) p_hash; /* Hash chain. */
159 LIST_ENTRY(proc) p_pglist; /* List of processes in pgrp. */
160 struct proc *p_pptr; /* Pointer to parent process. */
161 LIST_ENTRY(proc) p_sibling; /* List of sibling processes. */
162 LIST_HEAD(, proc) p_children; /* Pointer to list of children. */
98a7f915
MD
163 struct callout_handle p_ithandle; /* for scheduling p_realtimer */
164 struct varsymset p_varsymset;
984263bc 165
984263bc
MD
166/* The following fields are all zeroed upon creation in fork. */
167#define p_startzero p_oppid
168
169 pid_t p_oppid; /* Save parent pid during ptrace. XXX */
170 int p_dupfd; /* Sideways return value from fdopen. XXX */
171
172 struct vmspace *p_vmspace; /* Address space. */
173
174 /* scheduling */
175 u_int p_estcpu; /* Time averaged value of p_cpticks. */
214ce2e1 176 u_int p_estcpu_fork; /* estcpu as of fork, used in batch detect */
984263bc
MD
177 int p_cpticks; /* Ticks of cpu time. */
178 fixpt_t p_pctcpu; /* %cpu for this process during p_swtime */
984263bc
MD
179 u_int p_swtime; /* Time swapped in or out. */
180 u_int p_slptime; /* Time since last blocked. */
181
182 struct itimerval p_realtimer; /* Alarm timer. */
984263bc
MD
183
184 int p_traceflag; /* Kernel trace points. */
185 struct vnode *p_tracep; /* Trace to vnode. */
186
187 sigset_t p_siglist; /* Signals arrived but not delivered. */
188
189 struct vnode *p_textvp; /* Vnode of executable. */
190
191 char p_lock; /* Process lock (prevent swap) count. */
8ec60c3f 192 short p_priority; /* overall priority (lower==better) */
984263bc
MD
193 char p_rqindex; /* Run queue index */
194
984263bc
MD
195 unsigned int p_stops; /* procfs event bitmask */
196 unsigned int p_stype; /* procfs stop event type */
197 char p_step; /* procfs stop *once* flag */
198 unsigned char p_pfsflags; /* procfs flags */
199 char p_pad3[2]; /* padding for alignment */
984263bc
MD
200 struct sigiolst p_sigiolst; /* list of sigio sources */
201 int p_sigparent; /* signal to parent on exit */
202 sigset_t p_oldsigmask; /* saved mask from before sigpause */
203 int p_sig; /* for core dump/debugger XXX */
204 u_long p_code; /* for core dump/debugger XXX */
205 struct klist p_klist; /* knotes attached to this process */
206
207/* End area that is zeroed on creation. */
208#define p_endzero p_startcopy
209
210/* The following fields are all copied upon creation in fork. */
211#define p_startcopy p_sigmask
212
213 sigset_t p_sigmask; /* Current signal mask. */
214 stack_t p_sigstk; /* sp & on stack state variable */
8ec60c3f 215 char p_interactive; /* long term interactivity par-0 */
984263bc 216 char p_nice; /* Process "nice" value. */
984263bc
MD
217
218 struct pgrp *p_pgrp; /* Pointer to process group. */
219
220 struct sysentvec *p_sysent; /* System call dispatch information. */
221
222 struct rtprio p_rtprio; /* Realtime priority. */
984263bc
MD
223 struct pargs *p_args;
224/* End area that is copied on creation. */
225#define p_endcopy p_addr
226 struct user *p_addr; /* Kernel virtual addr of u-area (PROC ONLY). */
227 struct mdproc p_md; /* Any machine-dependent fields. */
228
229 u_short p_xstat; /* Exit status for wait; also stop signal. */
230 u_short p_acflag; /* Accounting flags. */
231 struct rusage *p_ru; /* Exit information. XXX */
232
233 int p_nthreads; /* number of threads (only in leader) */
234 void *p_aioinfo; /* ASYNC I/O info */
235 int p_wakeup; /* thread id */
236 struct proc *p_peers;
237 struct proc *p_leader;
984263bc 238 void *p_emuldata; /* process-specific emulator state data */
263e4574 239 struct thread *p_thread; /* temporarily embed thread struct in proc */
a722be49 240 struct upcall *p_upcall; /* USERLAND POINTER! registered upcall */
70293ea5 241 struct sched *p_sched; /* work-in-progress / Peter Kadau */
508ceb09 242 int p_numposixlocks; /* number of POSIX locks */
1fa2b4b4 243 TAILQ_HEAD(, sysmsg) p_sysmsgq; /* Recorded asynch system calls */
984263bc
MD
244};
245
b8acf5a9 246#if defined(_KERNEL)
0cfcada1
MD
247#define p_wchan p_thread->td_wchan
248#define p_wmesg p_thread->td_wmesg
73e4f7b9 249#define p_comm p_thread->td_comm
984263bc
MD
250#define p_session p_pgrp->pg_session
251#define p_pgid p_pgrp->pg_id
b8acf5a9 252#endif
984263bc
MD
253
254/* Status values. */
255#define SIDL 1 /* Process being created by fork. */
256#define SRUN 2 /* Currently runnable. */
257#define SSLEEP 3 /* Sleeping on an address. */
258#define SSTOP 4 /* Process debugging or suspension. */
259#define SZOMB 5 /* Awaiting collection by parent. */
73e4f7b9 260#define STHREAD 6 /* Synthesized for eproc only */
984263bc
MD
261
262/* These flags are kept in p_flags. */
263#define P_ADVLOCK 0x00001 /* Process may hold a POSIX advisory lock. */
264#define P_CONTROLT 0x00002 /* Has a controlling terminal. */
265#define P_INMEM 0x00004 /* Loaded into memory. */
266#define P_PPWAIT 0x00010 /* Parent is waiting for child to exec/exit. */
267#define P_PROFIL 0x00020 /* Has started profiling. */
dadab5e9 268#define P_SELECT 0x00040 /* Selecting; wakeup/waiting danger. */
984263bc
MD
269#define P_SINTR 0x00080 /* Sleep is interruptible. */
270#define P_SUGID 0x00100 /* Had set id privileges since last exec. */
271#define P_SYSTEM 0x00200 /* System proc: no sigs, stats or swapping. */
0a3f9b47 272#define P_UNUSED00400 0x00400
984263bc
MD
273#define P_TRACED 0x00800 /* Debugged process being traced. */
274#define P_WAITED 0x01000 /* Debugging process has waited for child. */
275#define P_WEXIT 0x02000 /* Working on exiting. */
276#define P_EXEC 0x04000 /* Process called exec. */
277
278/* Should probably be changed into a hold count. */
279/* was P_NOSWAP 0x08000 was: Do not swap upages; p->p_hold */
280/* was P_PHYSIO 0x10000 was: Doing physical I/O; use p->p_hold */
281
a722be49 282#define P_UPCALLPEND 0x20000 /* an upcall is pending */
984263bc
MD
283
284#define P_SWAPPING 0x40000 /* Process is being swapped. */
285#define P_SWAPINREQ 0x80000 /* Swapin request due to wakeup */
286
287/* Marked a kernel thread */
a2a5ad0d 288#define P_ONRUNQ 0x100000 /* on a user scheduling run queue */
984263bc 289#define P_KTHREADP 0x200000 /* Process is really a kernel thread */
8ec60c3f 290#define P_UNUSED400000 0x400000
984263bc
MD
291#define P_DEADLKTREAT 0x800000 /* lock aquisition - deadlock treatment */
292
293#define P_JAILED 0x1000000 /* Process is in jail */
294#define P_OLDMASK 0x2000000 /* need to restore mask before pause */
295#define P_ALTSTACK 0x4000000 /* have alternate signal stack */
296#define P_INEXEC 0x8000000 /* Process is in execve(). */
d9eea1a5 297#define P_PASSIVE_ACQ 0x10000000 /* Passive acquire cpu (see kern_switch) */
fe8c5e17 298#define P_UPCALLWAIT 0x20000000 /* Wait for upcall or signal */
984263bc 299
984263bc
MD
300#ifdef _KERNEL
301
302#ifdef MALLOC_DECLARE
303MALLOC_DECLARE(M_SESSION);
304MALLOC_DECLARE(M_SUBPROC);
305MALLOC_DECLARE(M_ZOMBIE);
306MALLOC_DECLARE(M_PARGS);
307#endif
308
309/* flags for suser_xxx() */
e4700d00
JH
310#define PRISON_ROOT 0x1
311#define NULL_CRED_OKAY 0x2
984263bc 312
95db0b6a 313/* Handy macro to determine if p1 can mangle p2 */
984263bc 314
41c20dac
MD
315#define PRISON_CHECK(cr1, cr2) \
316 ((!(cr1)->cr_prison) || (cr1)->cr_prison == (cr2)->cr_prison)
984263bc 317
95db0b6a
HP
318/*
319 * Handy macro for LISTs.
320 */
321#define FOREACH_PROC_IN_SYSTEM(p) LIST_FOREACH((p), &allproc, p_list)
322
984263bc
MD
323/*
324 * We use process IDs <= PID_MAX; PID_MAX + 1 must also fit in a pid_t,
325 * as it is used to represent "no process group".
326 */
327#define PID_MAX 99999
328#define NO_PID 100000
329
330#define SESS_LEADER(p) ((p)->p_session->s_leader == (p))
331#define SESSHOLD(s) ((s)->s_count++)
332#define SESSRELE(s) { \
333 if (--(s)->s_count == 0) \
334 FREE(s, M_SESSION); \
335}
336
337/*
8a8d5d85 338 * STOPEVENT
984263bc
MD
339 */
340extern void stopevent(struct proc*, unsigned int, unsigned int);
341#define STOPEVENT(p,e,v) \
342 do { \
343 if ((p)->p_stops & (e)) { \
984263bc 344 stopevent(p,e,v); \
984263bc
MD
345 } \
346 } while (0)
347
348/* hold process U-area in memory, normally for ptrace/procfs work */
349#define PHOLD(p) { \
350 if ((p)->p_lock++ == 0 && ((p)->p_flag & P_INMEM) == 0) \
351 faultin(p); \
352}
353#define PRELE(p) (--(p)->p_lock)
354
355#define PIDHASH(pid) (&pidhashtbl[(pid) & pidhash])
356extern LIST_HEAD(pidhashhead, proc) *pidhashtbl;
357extern u_long pidhash;
358
359#define PGRPHASH(pgid) (&pgrphashtbl[(pgid) & pgrphash])
360extern LIST_HEAD(pgrphashhead, pgrp) *pgrphashtbl;
361extern u_long pgrphash;
362
84b592ba 363#if 0
984263bc
MD
364#ifndef SET_CURPROC
365#define SET_CURPROC(p) (curproc = (p))
366#endif
984263bc 367#endif
84b592ba 368
984263bc 369extern struct proc proc0; /* Process slot for swapper. */
b7c628e4 370extern struct thread thread0; /* Thread slot for swapper. */
984263bc
MD
371extern int hogticks; /* Limit on kernel cpu hogs. */
372extern int nprocs, maxproc; /* Current and max number of procs. */
373extern int maxprocperuid; /* Max procs per uid. */
374extern int sched_quantum; /* Scheduling quantum in ticks */
375
376LIST_HEAD(proclist, proc);
377extern struct proclist allproc; /* List of all processes. */
378extern struct proclist zombproc; /* List of zombie processes. */
bc6dffab
MD
379extern struct proc *initproc; /* Process slot for init */
380extern struct thread *pagethread, *updatethread;
984263bc
MD
381
382#define NQS 32 /* 32 run queues. */
383TAILQ_HEAD(rq, proc);
984263bc
MD
384
385/*
49d50643
MD
386 * Scheduler estcpu macros.
387 *
388 * p_priority = NICE_ADJUST(p->p_nice - PRIO_MIN) +
389 * p->p_estcpu / ESTCPURAMP;
390 *
391 * NICE_WEIGHT determines the p_estcpu overlap between nice levels. It
392 * cannot exceed 3.0. A value of 2.0 gives us a nice small overlap between
393 * nice -20 and nice +0. A value of 3.0 reduces the overlap while a value
394 * of 1.0 increases the overlap.
395 *
396 * ESTCPURAMP determines how slowly estcpu effects the process priority.
397 * Higher numbers result in slower ramp-up times because estcpu is incremented
398 * once per scheduler tick and maxes out at ESTCPULIM.
0a3f9b47
MD
399 *
400 * ESTCPULIM = (127 - 2 * 40) * 8 = 376
401 *
402 * NOTE: ESTCPUVFREQ is the 'virtual' estcpu accumulation frequency, whereas
403 * ESTCPUFREQ is the actual interrupt rate. The ratio is used to scale
404 * both the ramp-up and the decay calculations in kern_synch.c.
984263bc 405 */
49d50643
MD
406
407#define ESTCPURAMP 8 /* higher equals slower */
408#define NICE_ADJUST(value) (((unsigned int)(NICE_WEIGHT * 128) * (value)) / 128)
0a3f9b47
MD
409#define ESTCPUMAX ((MAXPRI - NICE_ADJUST(PRIO_MAX - PRIO_MIN)) * ESTCPURAMP)
410#define ESTCPULIM(v) min((v), ESTCPUMAX)
4dcad57e 411#define ESTCPUFREQ 20 /* estcpu update frequency */
0a3f9b47 412#define ESTCPUVFREQ 40 /* virtual freq controls ramp*/
49d50643
MD
413#define NICE_WEIGHT 2.0 /* priorities per nice level */
414#define PPQ ((MAXPRI + 1) / NQS) /* priorities per queue */
984263bc
MD
415
416extern u_long ps_arg_cache_limit;
417extern int ps_argsopen;
28c57d20 418extern int ps_showallprocs;
984263bc 419
b153f746
RG
420struct proc *pfind (pid_t); /* Find process by id. */
421struct pgrp *pgfind (pid_t); /* Find process group by id. */
422struct proc *zpfind (pid_t); /* Find zombie process by id. */
984263bc
MD
423
424struct vm_zone;
a2a5ad0d 425struct globaldata;
984263bc
MD
426extern struct vm_zone *proc_zone;
427
b153f746
RG
428int enterpgrp (struct proc *p, pid_t pgid, int mksess);
429void fixjobc (struct proc *p, struct pgrp *pgrp, int entering);
430int inferior (struct proc *p);
431int leavepgrp (struct proc *p);
37af14fe 432void mi_switch (struct proc *p);
b153f746 433void procinit (void);
26a0694b 434void relscurproc(struct proc *curp);
b153f746
RG
435int p_trespass (struct ucred *cr1, struct ucred *cr2);
436void resetpriority (struct proc *);
437int roundrobin_interval (void);
cb973d15 438void resched_cpus(u_int32_t mask);
88c4d2f6 439void schedulerclock (void *dummy);
b153f746
RG
440void setrunnable (struct proc *);
441void clrrunnable (struct proc *, int stat);
442void setrunqueue (struct proc *);
443void sleepinit (void);
444int suser (struct thread *td);
445int suser_proc (struct proc *p);
446int suser_cred (struct ucred *cred, int flag);
447void remrunqueue (struct proc *);
435ff993 448void release_curproc (struct proc *curp);
b153f746 449void acquire_curproc (struct proc *curp);
8ec60c3f 450void select_curproc(struct globaldata *);
b153f746
RG
451void cpu_heavy_switch (struct thread *);
452void cpu_lwkt_switch (struct thread *);
453void unsleep (struct thread *);
454
455void cpu_proc_exit (void) __dead2;
456void cpu_thread_exit (void) __dead2;
457void exit1 (int) __dead2;
458void cpu_fork (struct proc *, struct proc *, int);
459void cpu_set_fork_handler (struct proc *, void (*)(void *), void *);
0cfcada1 460void cpu_set_thread_handler(struct thread *td, void (*retfunc)(void), void *func, void *arg);
b153f746
RG
461int fork1 (struct proc *, int, struct proc **);
462void start_forked_proc (struct proc *, struct proc *);
463int trace_req (struct proc *);
464void cpu_proc_wait (struct proc *);
465void cpu_thread_wait (struct thread *);
466int cpu_coredump (struct thread *, struct vnode *, struct ucred *);
467void setsugid (void);
468void faultin (struct proc *p);
984263bc 469
b153f746 470u_int32_t procrunnable (void);
984263bc
MD
471
472#endif /* _KERNEL */
473
474#endif /* !_SYS_PROC_H_ */