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. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 #ifndef _SYS_PROC_H_ 35 #define _SYS_PROC_H_ 36 37 #if !defined(_KERNEL) && !defined(_KERNEL_STRUCTURES) 38 39 #error "Userland must include sys/user.h instead of sys/proc.h" 40 41 #else 42 43 #include <sys/callout.h> /* For struct callout. */ 44 #include <sys/filedesc.h> 45 #include <sys/queue.h> 46 #include <sys/tree.h> 47 #include <sys/rtprio.h> /* For struct rtprio. */ 48 #include <sys/signal.h> 49 #include <sys/lock.h> 50 #include <sys/upmap.h> 51 #ifndef _KERNEL 52 #include <sys/time.h> /* For structs itimerval, timeval. */ 53 #endif 54 #include <sys/ucred.h> 55 #include <sys/event.h> /* For struct klist */ 56 #include <sys/eventvar.h> 57 #include <sys/sysent.h> /* For struct sysentvec */ 58 #include <sys/thread.h> 59 #include <sys/varsym.h> 60 #include <sys/resourcevar.h> 61 #ifdef _KERNEL 62 #include <sys/procctl.h> 63 #include <sys/globaldata.h> 64 #endif 65 #include <sys/systimer.h> 66 #include <sys/iosched.h> 67 #include <sys/usched.h> 68 #include <machine/proc.h> /* Machine-dependent proc substruct. */ 69 #include <machine/atomic.h> /* Machine-dependent proc substruct. */ 70 #include <sys/signalvar.h> 71 72 struct proc; 73 struct pgrp; 74 struct session; 75 struct lwp; 76 struct uidcount; 77 struct procglob; 78 79 LIST_HEAD(proclist, proc); 80 LIST_HEAD(pgrplist, pgrp); 81 LIST_HEAD(sesslist, session); 82 LIST_HEAD(lwplist, lwp); 83 84 struct lwp_rb_tree; 85 RB_HEAD(lwp_rb_tree, lwp); 86 RB_PROTOTYPE2(lwp_rb_tree, lwp, u.lwp_rbnode, rb_lwp_compare, lwpid_t); 87 88 /* 89 * One structure allocated per session. 90 */ 91 struct session { 92 LIST_ENTRY(session) s_list; /* Hash chain. */ 93 int s_count; /* Ref cnt; pgrps in session. */ 94 struct procglob *s_prg; 95 struct proc *s_leader; /* Session leader. */ 96 struct vnode *s_ttyvp; /* Vnode of controlling terminal. */ 97 struct tty *s_ttyp; /* Controlling terminal. */ 98 pid_t s_sid; /* Session ID */ 99 char s_login[roundup(MAXLOGNAME, sizeof(long))]; /* Setlogin() name. */ 100 }; 101 102 /* 103 * One structure allocated per process group. 104 */ 105 struct pgrp { 106 LIST_ENTRY(pgrp) pg_list; /* Hash chain. */ 107 struct proclist pg_members; /* Pointer to pgrp members. */ 108 struct session *pg_session; /* Pointer to session. */ 109 struct sigiolst pg_sigiolst; /* List of sigio sources. */ 110 pid_t pg_id; /* Pgrp id. */ 111 int pg_jobc; /* # procs qualifying pgrp for job control */ 112 u_int pg_refs; 113 struct lwkt_token pg_token; 114 struct lock pg_lock; 115 }; 116 117 #define PS_NOCLDWAIT 0x0001 /* No zombies if child dies */ 118 #define PS_NOCLDSTOP 0x0002 /* No SIGCHLD when children stop. */ 119 #define PS_CLDSIGIGN 0x0004 /* The SIGCHLD handler is SIG_IGN. */ 120 121 /* 122 * pargs, used to hold a copy of the command line, if it had a sane 123 * length 124 */ 125 struct pargs { 126 u_int ar_ref; /* Reference count */ 127 u_int ar_length; /* Length */ 128 u_char ar_args[0]; /* Arguments */ 129 }; 130 131 /* 132 * Description of a process. 133 * 134 * This structure contains the information needed to manage a thread of 135 * control, known in UN*X as a process; it has references to substructures 136 * containing descriptions of things that the process uses, but may share 137 * with related processes. The process structure and the substructures 138 * are always addressable except for those marked "(PROC ONLY)" below, 139 * which might be addressable only on a processor on which the process 140 * is running. 141 * 142 * NOTE! The process start time is stored in the thread structure associated 143 * with the process. If the process is a Zombie, then this field will be 144 * inaccessible due to the thread structure being free'd in kern_wait1(). 145 */ 146 147 struct jail; 148 struct vkernel_proc; 149 struct vkernel_lwp; 150 struct vmspace_entry; 151 struct ktrace_node; 152 struct sem_undo; 153 154 enum lwpstat { 155 LSRUN = 1, 156 LSSTOP = 2, 157 LSSLEEP = 3, 158 }; 159 160 enum procstat { 161 SIDL = 1, 162 SACTIVE = 2, 163 SSTOP = 3, 164 SZOMB = 4, 165 SCORE = 5, 166 }; 167 168 struct lwp { 169 TAILQ_ENTRY(lwp) lwp_procq; /* run/sleep queue. */ 170 union { 171 RB_ENTRY(lwp) lwp_rbnode; /* RB tree node - lwp in proc */ 172 LIST_ENTRY(lwp) lwp_reap_entry; /* reaper list */ 173 } u; 174 175 struct proc *lwp_proc; /* Link to our proc. */ 176 struct vmspace *lwp_vmspace; /* Inherited from p_vmspace */ 177 struct vkernel_lwp *lwp_vkernel;/* VKernel support, lwp part */ 178 179 lwpid_t lwp_tid; /* Our thread id, >= 1 */ 180 181 u_int lwp_flags; /* LWP_* flags */ 182 u_int lwp_mpflags; /* LWP_MP_* flags */ 183 enum lwpstat lwp_stat; /* LS* lwp status */ 184 int lwp_lock; /* lwp lock (prevent destruct) count */ 185 186 int lwp_dupfd; /* Sideways return value from fdopen */ 187 188 /* 189 * The following two fields are marked XXX since (at least) the 190 * 4.4BSD-Lite2 import. I can only guess the reason: It is ugly. 191 * These fields are used to pass the trap code from trapsignal() to 192 * postsig(), which gets called later from userret(). 193 * 194 * The correct "fix" for these XXX is to convert our signal system 195 * to use signal queues, where each signal can carry its own meta 196 * data. 197 */ 198 int lwp_sig; /* for core dump/debugger XXX */ 199 u_long lwp_code; /* for core dump/debugger XXX */ 200 201 /* 202 * Scheduling. 203 */ 204 sysclock_t lwp_cpticks; /* cpu used in sched clock ticks */ 205 sysclock_t lwp_cpbase; /* Measurement base */ 206 fixpt_t lwp_pctcpu; /* %cpu for this process */ 207 u_int lwp_slptime; /* Time since last blocked. */ 208 u_int lwp_rebal_ticks; /* Timestamp sched on current cpu */ 209 210 int lwp_traceflag; /* Kernel trace points. */ 211 212 struct rusage lwp_ru; /* stats for this lwp */ 213 214 union usched_data lwp_usdata; /* User scheduler specific */ 215 216 #define lwp_startcopy lwp_cpumask 217 cpumask_t lwp_cpumask; 218 sigset_t lwp_siglist; /* Signals arrived but not delivered. */ 219 sigset_t lwp_oldsigmask; /* saved mask from before sigpause */ 220 sigset_t lwp_sigmask; /* Current signal mask. */ 221 stack_t lwp_sigstk; /* sp & on stack state variable */ 222 223 struct rtprio lwp_rtprio; /* Realtime priority. */ 224 #define lwp_endcopy lwp_md 225 226 struct mdproc lwp_md; /* Any machine-dependent fields. */ 227 228 struct thread *lwp_thread; /* backpointer to proc's thread */ 229 void *lwp_unused01; /* for future fields */ 230 struct kqueue lwp_kqueue; /* for select/poll */ 231 uint64_t lwp_kqueue_serial; /* for select/poll */ 232 struct lwkt_token lwp_token; /* per-lwp token for signal/state */ 233 struct spinlock lwp_spin; /* spinlock for signal handling */ 234 void *lwp_reserveds1; /* reserved for lwp_saveusp */ 235 void *lwp_reserveds2; /* reserved for lwp_saveupc */ 236 }; 237 238 struct proc { 239 LIST_ENTRY(proc) p_list; /* List of all processes. */ 240 241 /* substructures: */ 242 struct ucred *p_ucred; /* Process owner's identity. */ 243 struct filedesc *p_fd; /* Ptr to open files structure. */ 244 struct filedesc_to_leader *p_fdtol; /* Ptr to tracking node XXX lwp */ 245 struct plimit *p_limit; /* Process limits. */ 246 struct pstats *p_stats; 247 u_int p_mqueue_cnt; /* Count of open mqueues. */ 248 long p_waitgen; /* wait interlock allows late signal */ 249 struct sigacts *p_sigacts; 250 #define p_sigignore p_sigacts->ps_sigignore 251 #define p_sigcatch p_sigacts->ps_sigcatch 252 #define p_rlimit p_limit->pl_rlimit 253 254 int p_flags; /* P_* flags. */ 255 enum procstat p_stat; /* S* process status. */ 256 char p_advlock_flag; /* replaces P_ADVLOCK */ 257 char p_pad1[2]; 258 259 pid_t p_pid; /* Process identifier. */ 260 pid_t p_ppid; /* Current parent pid */ 261 LIST_ENTRY(proc) p_pglist; /* List of processes in pgrp. */ 262 struct proc *p_pptr; /* Pointer to parent process. */ 263 LIST_ENTRY(proc) p_sibling; /* List of sibling processes. */ 264 struct proclist p_children; /* Pointer to list of children. */ 265 struct callout p_ithandle; /* for scheduling p_realtimer */ 266 struct varsymset p_varsymset; 267 struct iosched_data p_iosdata; /* Dynamic I/O scheduling data */ 268 269 pid_t p_oppid; /* Save parent pid during ptrace. XXX */ 270 271 struct vmspace *p_vmspace; /* Current address space. */ 272 273 unsigned int p_swtime; /* Time swapped in or out */ 274 275 struct itimerval p_realtimer; /* Alarm timer. */ 276 struct itimerval p_timer[3]; /* Virtual-time timers. */ 277 278 int p_traceflag; /* Kernel trace points. */ 279 struct ktrace_node *p_tracenode; /* Trace to vnode. */ 280 281 sigset_t p_siglist; /* Signals arrived but not delivered. */ 282 283 struct vnode *p_textvp; /* Vnode of executable. */ 284 struct nchandle p_textnch; /* namecache handle of executable. */ 285 286 unsigned int p_stops; /* procfs event bitmask */ 287 unsigned int p_stype; /* procfs stop event type */ 288 char p_step; /* procfs stop *once* flag */ 289 unsigned char p_pfsflags; /* procfs flags */ 290 char p_pad2[2]; 291 struct sigiolst p_sigiolst; /* list of sigio sources */ 292 int p_sigparent; /* signal to parent on exit */ 293 struct klist p_klist; /* knotes attached to this process */ 294 295 struct timeval p_start; /* start time for a process */ 296 297 struct rusage p_ru; /* stats for this proc */ 298 struct rusage p_cru; /* sum of stats for reaped children */ 299 void *p_unused01; 300 301 /* The following fields are all copied upon creation in fork. */ 302 #define p_startcopy p_comm 303 304 char p_comm[MAXCOMLEN+1]; /* typ 16+1 bytes */ 305 char p_pad3; 306 char p_nice; /* Process "nice" value. */ 307 char p_pad4; 308 int p_osrel; /* release date for binary ELF note */ 309 310 struct pgrp *p_pgrp; /* Pointer to process group. */ 311 312 struct sysentvec *p_sysent; /* System call dispatch information. */ 313 314 struct uprof p_prof; /* Profiling arguments. */ 315 struct rtprio p_rtprio; /* Realtime priority. */ 316 struct pargs *p_args; 317 u_short p_xstat; /* Exit status or last stop signal */ 318 u_short p_depth; /* Used to downscale resource limits */ 319 320 int p_ionice; 321 void *p_unused02; 322 /* End area that is copied on creation. */ 323 #define p_endcopy p_unused02 324 u_short p_acflag; /* Accounting flags. */ 325 326 int p_lock; /* Prevent proc destruction */ 327 int p_nthreads; /* Number of threads in this process. */ 328 int p_nstopped; /* Number of stopped threads. */ 329 int p_lasttid; /* Last tid used. */ 330 struct lwp_rb_tree p_lwp_tree; /* RB tree of LWPs for this process */ 331 void *p_aioinfo; /* ASYNC I/O info */ 332 int p_wakeup; /* thread id XXX lwp */ 333 struct proc *p_peers; /* XXX lwp */ 334 struct proc *p_leader; /* XXX lwp */ 335 void *p_emuldata; /* process-specific emulator state */ 336 struct usched *p_usched; /* Userland scheduling control */ 337 struct vkernel_proc *p_vkernel; /* VKernel support, proc part */ 338 struct uidcount *p_uidpcpu; 339 void (*p_userret)(void);/* p: return-to-user hook */ 340 341 struct spinlock p_spin; /* Spinlock for LWP access to proc */ 342 struct lwkt_token p_token; /* Token for LWP access to proc */ 343 struct sem_undo *p_sem_undo; /* Fast semaphore tracking lookup */ 344 void *p_drv_priv; /* scp linkage (for syscons) */ 345 void *p_vmm; 346 cpulock_t p_vmm_cpulock; /* count cpus in and kickout lock */ 347 cpumask_t p_vmm_cpumask; /* cpus entering or in vmm */ 348 struct sys_upmap *p_upmap; /* user RO mappable per-process page */ 349 forkid_t p_forkid; /* unique forkid */ 350 struct sysreaper *p_reaper; /* reaper control */ 351 void *p_reserveds[3]; /* reserved for future */ 352 }; 353 354 #define lwp_wchan lwp_thread->td_wchan 355 #define lwp_wmesg lwp_thread->td_wmesg 356 #define p_session p_pgrp->pg_session 357 #define p_pgid p_pgrp->pg_id 358 359 /* These flags are kept in p_flags. */ 360 #define P_UNUSED00 0x00001 /* was: Process may hold a POSIX advisory lock */ 361 #define P_CONTROLT 0x00002 /* Has a controlling terminal */ 362 #define P_SWAPPEDOUT 0x00004 /* Swapped out of memory */ 363 #define P_SYSVSEM 0x00008 /* Might have SysV semaphores */ 364 #define P_PPWAIT 0x00010 /* Parent is waiting for child to exec/exit */ 365 #define P_PROFIL 0x00020 /* Has started profiling */ 366 #define P_POSTEXIT 0x00040 /* Prevent procfs from stepping after this pt */ 367 #define P_SCMOUSE 0x00080 /* Process is held by syscons ioctl */ 368 /* was: Sleep is interruptible */ 369 #define P_SUGID 0x00100 /* Had set id privileges since last exec */ 370 #define P_SYSTEM 0x00200 /* System proc: no sigs, stats or swapping */ 371 #define P_MAYBETHREADED 0x00400 /* might be threaded optimization */ 372 #define P_TRACED 0x00800 /* Debugged process being traced */ 373 #define P_WAITED 0x01000 /* SIGSTOP status was returned by wait3/4 */ 374 #define P_WEXIT 0x02000 /* Working on exiting (master exit) */ 375 #define P_EXEC 0x04000 /* Process called exec */ 376 #define P_CONTINUED 0x08000 /* Proc has continued from a stopped state */ 377 378 #define P_LOWMEMKILL 0x00010000 /* trying to kill due to low memory */ 379 #define P_UNUSED17 0x00020000 380 381 #define P_SWAPWAIT 0x00040000 /* Waiting for a swapin */ 382 #define P_UNUSED19 0x00080000 /* was: Now in a zombied state */ 383 384 /* Marked a kernel thread */ 385 #define P_UNUSED20 0x00100000 /* was: on a user scheduling run queue */ 386 #define P_UNUSED21 0x00200000 /* was: Process is really a kernel thread */ 387 #define P_IDLESWAP 0x00400000 /* Swapout was due to idleswap, not load */ 388 389 #define P_JAILED 0x01000000 /* Process is in jail */ 390 #define P_SIGVTALRM 0x02000000 /* signal SIGVTALRM pending due to itimer */ 391 #define P_SIGPROF 0x04000000 /* signal SIGPROF pending due to itimer */ 392 #define P_INEXEC 0x08000000 /* Process is in execve(). */ 393 #define P_DIDCHROOT 0x10000000 /* Did at least one chroot */ 394 #define P_UNUSED29 0x20000000 395 #define P_XCPU 0x40000000 /* SIGXCPU */ 396 397 #define LWP_ALTSTACK 0x0000001 /* have alternate signal stack */ 398 #define LWP_OLDMASK 0x0000002 /* need to restore mask before pause */ 399 #define LWP_SINTR 0x0000008 /* Sleep is interruptible. */ 400 #define LWP_SELECT 0x0000010 /* Selecting; wakeup/waiting danger. */ 401 #define LWP_UNUSED20 0x0000020 402 #define LWP_UNUSED40 0x0000040 403 #define LWP_UNUSED80 0x0000080 404 #define LWP_PASSIVE_ACQ 0x0000100 /* Passive acquire cpu (see kern_switch) */ 405 #define LWP_PAGING 0x0000200 /* Currently in vm_fault */ 406 407 /* 408 * LWP_MP_WSTOP: When set the thread will stop prior to return to userland 409 * and has been counted in the process stop-threads-count, but 410 * may still be running in kernel-land. 411 * 412 * LWP_MP_WEXIT: When set the thread has been asked to exit and will not return 413 * to userland. p_nthreads will not be decremented until the 414 * thread has actually exited. 415 */ 416 #define LWP_MP_ONRUNQ 0x0000001 /* on a user scheduling run queue */ 417 #define LWP_MP_WEXIT 0x0000002 /* working on exiting (lwpuserret()) */ 418 #define LWP_MP_WSTOP 0x0000004 /* working on stopping */ 419 #define LWP_MP_ULOAD 0x0000008 /* uload accounting for current cpu */ 420 #define LWP_MP_RRFORCE 0x0000010 /* forced resched due to rrcount */ 421 #define LWP_MP_VNLRU 0x0000020 /* check excessive vnode allocations (lwpuserret()) */ 422 423 #define LWP_MP_URETMASK (LWP_MP_WEXIT | LWP_MP_VNLRU) 424 425 #define FIRST_LWP_IN_PROC(p) RB_FIRST(lwp_rb_tree, &(p)->p_lwp_tree) 426 #define FOREACH_LWP_IN_PROC(lp, p) \ 427 RB_FOREACH(lp, lwp_rb_tree, &(p)->p_lwp_tree) 428 #define ONLY_LWP_IN_PROC(p) _only_lwp_in_proc(p, __func__) 429 430 struct procglob { 431 struct lwkt_token proc_token; 432 struct proclist allproc; /* locked by proc_token */ 433 struct pgrplist allpgrp; /* locked by proc_token */ 434 struct sesslist allsess; /* locked by proc_token */ 435 void *pad01; /* pad for clarity */ 436 } __cachealign; 437 438 #ifdef _KERNEL 439 static inline struct lwp * 440 _only_lwp_in_proc(struct proc *p, const char *caller) 441 { 442 if (p->p_nthreads != 1) { 443 panic("%s: proc %p (pid %d cmd %s) has more than one thread", 444 caller, p, p->p_pid, p->p_comm); 445 } 446 return RB_ROOT(&p->p_lwp_tree); 447 } 448 #endif 449 450 /* 451 * We use process IDs <= PID_MAX. NO_PID must also fit in a pid_t and 452 * is used to represent "no process group". 453 */ 454 #define PID_MAX 999999 455 #define NO_PID 0x7FFFFFFF 456 457 #define SESS_LEADER(p) ((p)->p_session->s_leader == (p)) 458 459 #ifdef _KERNEL 460 461 #ifdef MALLOC_DECLARE 462 MALLOC_DECLARE(M_SESSION); 463 MALLOC_DECLARE(M_PROC); 464 MALLOC_DECLARE(M_LWP); 465 MALLOC_DECLARE(M_SUBPROC); 466 MALLOC_DECLARE(M_PARGS); 467 #endif 468 469 /* for priv_check_cred() */ 470 #define NULL_CRED_OKAY 0x2 471 472 /* 473 * Handy macro to determine if p1 can mangle p2. 474 * 475 * Must be spin-safe. 476 */ 477 #define PRISON_CHECK(cr1, cr2) \ 478 ((!(cr1)->cr_prison) || (cr1)->cr_prison == (cr2)->cr_prison) 479 480 /* 481 * STOPEVENT 482 */ 483 extern void stopevent(struct proc*, unsigned int, unsigned int); 484 #define STOPEVENT(p,e,v) \ 485 do { \ 486 if ((p)->p_stops & (e)) { \ 487 stopevent(p,e,v); \ 488 } \ 489 } while (0) 490 491 /* 492 * Hold process in memory, don't destruct, used by ktrace, procfs, sigio, 493 * and signaling code (e.g. ksignal()). 494 * 495 * MPSAFE 496 */ 497 #define PHOLD(p) phold((p)) 498 #define PRELE(p) prele((p)) 499 #define PHOLDZOMB(p) pholdzomb((p)) 500 #define PRELEZOMB(p) prelezomb((p)) 501 #define PSTALL(p, msg, n) \ 502 do { if ((p)->p_lock > (n)) pstall((p), (msg), (n)); } while (0) 503 504 #define STOPLWP(p, lp) \ 505 (((p)->p_stat == SSTOP || (p)->p_stat == SCORE) && \ 506 ((lp)->lwp_mpflags & LWP_MP_WEXIT) == 0) 507 508 /* 509 * Hold lwp in memory, don't destruct, normally for ptrace/procfs work 510 * atomic ops because they can occur from an IPI. 511 * MPSAFE 512 */ 513 #define LWPHOLD(lp) atomic_add_int(&(lp)->lwp_lock, 1) 514 #define LWPRELE(lp) atomic_add_int(&(lp)->lwp_lock, -1) 515 516 extern struct proc proc0; /* Process slot for swapper. */ 517 extern struct lwp lwp0; /* LWP slot for swapper. */ 518 extern struct thread thread0; /* Thread slot for swapper. */ 519 extern int nprocs, maxproc; /* Current and max number of procs. */ 520 extern int maxprocperuid; /* Max procs per uid. */ 521 522 extern struct proc *initproc; /* Process slot for init */ 523 extern struct thread *pagethread; 524 extern struct thread *emergpager; 525 extern struct thread *updatethread; 526 527 /* 528 * Scheduler independant variables. The primary scheduler polling frequency, 529 * the maximum ESTCPU value, and the weighting factor for nice values. A 530 * cpu bound program's estcpu will increase to ESTCPUMAX - 1. 531 */ 532 #define ESTCPUFREQ 50 533 534 extern u_long ps_arg_cache_limit; 535 extern int ps_argsopen; 536 extern int ps_showallprocs; 537 538 struct proc *pfind (pid_t); /* Find process by id w/ref */ 539 struct proc *pfindn (pid_t); /* Find process by id wo/ref */ 540 struct pgrp *pgfind (pid_t); /* Find process group by id w/ref */ 541 struct proc *zpfind (pid_t); /* Find zombie process by id w/ref */ 542 void pgref (struct pgrp *); /* Ref pgrp preventing disposal */ 543 void pgrel (struct pgrp *); /* Deref pgrp & dispose on 1->0 trans */ 544 545 struct globaldata; 546 struct lwp_params; 547 548 int enterpgrp (struct proc *p, pid_t pgid, int mksess); 549 void proc_add_allproc(struct proc *p); 550 void proc_move_allproc_zombie(struct proc *); 551 void proc_remove_zombie(struct proc *); 552 void allproc_scan(int (*callback)(struct proc *, void *), void *data, 553 int segmented); 554 void alllwp_scan(int (*callback)(struct lwp *, void *), void *data, 555 int segmented); 556 void zombproc_scan(int (*callback)(struct proc *, void *), void *data); 557 void fixjobc (struct proc *p, struct pgrp *pgrp, int entering); 558 void updatepcpu(struct lwp *, int, int); 559 int inferior (struct proc *p); 560 int leavepgrp (struct proc *p); 561 void sess_hold(struct session *sp); 562 void sess_rele(struct session *sp); 563 void procinit (void); 564 void procinsertinit(struct proc *p); 565 void sessinsertinit(struct session *sess); 566 void pgrpinsertinit(struct pgrp *pg); 567 void relscurproc(struct proc *curp); 568 int p_trespass (struct ucred *cr1, struct ucred *cr2); 569 void setrunnable (struct lwp *); 570 void proc_stop (struct proc *, int); 571 void proc_unstop (struct proc *, int); 572 void sleep_early_gdinit (struct globaldata *); 573 void sleep_gdinit (struct globaldata *); 574 thread_t cpu_heavy_switch (struct thread *); 575 thread_t cpu_lwkt_switch (struct thread *); 576 577 void cpu_lwp_exit (void) __dead2; 578 void cpu_thread_exit (void) __dead2; 579 void lwp_exit (int masterexit, void *waddr) __dead2; 580 void lwp_dispose (struct lwp *); 581 int killalllwps (int); 582 void exit1 (int) __dead2; 583 void cpu_fork (struct lwp *, struct lwp *, int); 584 int cpu_prepare_lwp(struct lwp *, struct lwp_params *); 585 void cpu_set_fork_handler (struct lwp *, void (*)(void *, struct trapframe *), void *); 586 void cpu_set_thread_handler(struct thread *td, void (*retfunc)(void), void *func, void *arg); 587 int fork1 (struct lwp *, int, struct proc **); 588 void start_forked_proc (struct lwp *, struct proc *); 589 int trace_req (struct proc *); 590 void cpu_thread_wait (struct thread *); 591 void setsugid (void); 592 void faultin (struct proc *p); 593 void swapin_request (void); 594 void phold (struct proc *); 595 void prele (struct proc *); 596 int pholdzomb (struct proc *); 597 void prelezomb (struct proc *); 598 void pstall (struct proc *, const char *, int); 599 void lwpuserret(struct lwp *); 600 void lwpkthreaddeferred(void); 601 void proc_usermap(struct proc *p, int invfork); 602 void proc_userunmap(struct proc *p); 603 void reaper_hold(struct sysreaper *reap); 604 void reaper_drop(struct sysreaper *reap); 605 int reaper_sigtest(struct proc *sender, struct proc *target, int reaper_ok); 606 struct sysreaper *reaper_exit(struct proc *p); 607 void reaper_init(struct proc *p, struct sysreaper *reap); 608 struct proc *reaper_get(struct sysreaper *reap); 609 610 u_int32_t procrunnable (void); 611 612 #endif /* _KERNEL */ 613 614 #endif /* _KERNEL || _KERNEL_STRUCTURES */ 615 #endif /* !_SYS_PROC_H_ */ 616