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