| 1 | /*- |
| 2 | * Copyright (c) 1986, 1989, 1991, 1993 |
| 3 | * The Regents of the University of California. All rights reserved. |
| 4 | * (c) UNIX System Laboratories, Inc. |
| 5 | * All or some portions of this file are derived from material licensed |
| 6 | * to the University of California by American Telephone and Telegraph |
| 7 | * Co. or Unix System Laboratories, Inc. and are reproduced herein with |
| 8 | * the permission of UNIX System Laboratories, Inc. |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or without |
| 11 | * modification, are permitted provided that the following conditions |
| 12 | * are met: |
| 13 | * 1. Redistributions of source code must retain the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer. |
| 15 | * 2. Redistributions in binary form must reproduce the above copyright |
| 16 | * notice, this list of conditions and the following disclaimer in the |
| 17 | * documentation and/or other materials provided with the distribution. |
| 18 | * 3. All advertising materials mentioning features or use of this software |
| 19 | * must display the following acknowledgement: |
| 20 | * This product includes software developed by the University of |
| 21 | * California, Berkeley and its contributors. |
| 22 | * 4. Neither the name of the University nor the names of its contributors |
| 23 | * may be used to endorse or promote products derived from this software |
| 24 | * without specific prior written permission. |
| 25 | * |
| 26 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 27 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 28 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 29 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 30 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 31 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 32 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 33 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 34 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 35 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 36 | * SUCH DAMAGE. |
| 37 | * |
| 38 | * @(#)proc.h 8.15 (Berkeley) 5/19/95 |
| 39 | * $FreeBSD: src/sys/sys/proc.h,v 1.99.2.9 2003/06/06 20:21:32 tegge Exp $ |
| 40 | */ |
| 41 | |
| 42 | #ifndef _SYS_PROC_H_ |
| 43 | #define _SYS_PROC_H_ |
| 44 | |
| 45 | #if !defined(_KERNEL) && !defined(_KERNEL_STRUCTURES) |
| 46 | |
| 47 | #error "Userland must include sys/user.h instead of sys/proc.h" |
| 48 | |
| 49 | #else |
| 50 | |
| 51 | #include <sys/callout.h> /* For struct callout_handle. */ |
| 52 | #include <sys/filedesc.h> |
| 53 | #include <sys/queue.h> |
| 54 | #include <sys/tree.h> |
| 55 | #include <sys/rtprio.h> /* For struct rtprio. */ |
| 56 | #include <sys/signal.h> |
| 57 | #include <sys/lock.h> |
| 58 | #ifndef _KERNEL |
| 59 | #include <sys/time.h> /* For structs itimerval, timeval. */ |
| 60 | #endif |
| 61 | #include <sys/ucred.h> |
| 62 | #include <sys/event.h> /* For struct klist */ |
| 63 | #include <sys/eventvar.h> |
| 64 | #include <sys/sysent.h> /* For struct sysentvec */ |
| 65 | #include <sys/thread.h> |
| 66 | #include <sys/varsym.h> |
| 67 | #include <sys/upcall.h> |
| 68 | #include <sys/resourcevar.h> |
| 69 | #ifdef _KERNEL |
| 70 | #include <sys/globaldata.h> |
| 71 | #endif |
| 72 | #include <sys/systimer.h> |
| 73 | #include <sys/iosched.h> |
| 74 | #include <sys/usched.h> |
| 75 | #include <machine/proc.h> /* Machine-dependent proc substruct. */ |
| 76 | #include <machine/atomic.h> /* Machine-dependent proc substruct. */ |
| 77 | #include <sys/signalvar.h> |
| 78 | |
| 79 | LIST_HEAD(proclist, proc); |
| 80 | LIST_HEAD(lwplist, lwp); |
| 81 | |
| 82 | struct lwp_rb_tree; |
| 83 | RB_HEAD(lwp_rb_tree, lwp); |
| 84 | RB_PROTOTYPE2(lwp_rb_tree, lwp, u.lwp_rbnode, rb_lwp_compare, lwpid_t); |
| 85 | |
| 86 | /* |
| 87 | * One structure allocated per session. |
| 88 | */ |
| 89 | struct session { |
| 90 | int s_count; /* Ref cnt; pgrps in session. */ |
| 91 | struct proc *s_leader; /* Session leader. */ |
| 92 | struct vnode *s_ttyvp; /* Vnode of controlling terminal. */ |
| 93 | struct tty *s_ttyp; /* Controlling terminal. */ |
| 94 | pid_t s_sid; /* Session ID */ |
| 95 | char s_login[roundup(MAXLOGNAME, sizeof(long))]; /* Setlogin() name. */ |
| 96 | }; |
| 97 | |
| 98 | /* |
| 99 | * One structure allocated per process group. |
| 100 | */ |
| 101 | struct pgrp { |
| 102 | LIST_ENTRY(pgrp) pg_hash; /* Hash chain. */ |
| 103 | struct proclist pg_members; /* Pointer to pgrp members. */ |
| 104 | struct session *pg_session; /* Pointer to session. */ |
| 105 | struct sigiolst pg_sigiolst; /* List of sigio sources. */ |
| 106 | pid_t pg_id; /* Pgrp id. */ |
| 107 | int pg_jobc; /* # procs qualifying pgrp for job control */ |
| 108 | u_int pg_refs; |
| 109 | struct lwkt_token pg_token; |
| 110 | struct lock pg_lock; |
| 111 | }; |
| 112 | |
| 113 | #define PS_NOCLDWAIT 0x0001 /* No zombies if child dies */ |
| 114 | #define PS_NOCLDSTOP 0x0002 /* No SIGCHLD when children stop. */ |
| 115 | |
| 116 | /* |
| 117 | * pargs, used to hold a copy of the command line, if it had a sane |
| 118 | * length |
| 119 | */ |
| 120 | struct pargs { |
| 121 | u_int ar_ref; /* Reference count */ |
| 122 | u_int ar_length; /* Length */ |
| 123 | u_char ar_args[0]; /* Arguments */ |
| 124 | }; |
| 125 | |
| 126 | /* |
| 127 | * Description of a process. |
| 128 | * |
| 129 | * This structure contains the information needed to manage a thread of |
| 130 | * control, known in UN*X as a process; it has references to substructures |
| 131 | * containing descriptions of things that the process uses, but may share |
| 132 | * with related processes. The process structure and the substructures |
| 133 | * are always addressable except for those marked "(PROC ONLY)" below, |
| 134 | * which might be addressable only on a processor on which the process |
| 135 | * is running. |
| 136 | * |
| 137 | * NOTE! The process start time is stored in the thread structure associated |
| 138 | * with the process. If the process is a Zombie, then this field will be |
| 139 | * inaccessible due to the thread structure being free'd in kern_wait1(). |
| 140 | */ |
| 141 | |
| 142 | struct jail; |
| 143 | struct vkernel_proc; |
| 144 | struct vkernel_lwp; |
| 145 | struct vmspace_entry; |
| 146 | struct ktrace_node; |
| 147 | |
| 148 | enum lwpstat { |
| 149 | LSRUN = 1, |
| 150 | LSSTOP = 2, |
| 151 | LSSLEEP = 3, |
| 152 | }; |
| 153 | |
| 154 | enum procstat { |
| 155 | SIDL = 1, |
| 156 | SACTIVE = 2, |
| 157 | SSTOP = 3, |
| 158 | SZOMB = 4, |
| 159 | }; |
| 160 | |
| 161 | struct lwp { |
| 162 | TAILQ_ENTRY(lwp) lwp_procq; /* run/sleep queue. */ |
| 163 | union { |
| 164 | RB_ENTRY(lwp) lwp_rbnode; /* RB tree node - lwp in proc */ |
| 165 | LIST_ENTRY(lwp) lwp_reap_entry; /* reaper list */ |
| 166 | } u; |
| 167 | |
| 168 | struct proc *lwp_proc; /* Link to our proc. */ |
| 169 | struct vmspace *lwp_vmspace; /* Inherited from p_vmspace */ |
| 170 | struct vkernel_lwp *lwp_vkernel;/* VKernel support, lwp part */ |
| 171 | |
| 172 | lwpid_t lwp_tid; /* Our thread id */ |
| 173 | |
| 174 | u_int lwp_flags; /* LWP_* flags */ |
| 175 | u_int lwp_mpflags; /* LWP_MP_* flags */ |
| 176 | enum lwpstat lwp_stat; /* LS* lwp status */ |
| 177 | int lwp_lock; /* lwp lock (prevent destruct) count */ |
| 178 | |
| 179 | int lwp_dupfd; /* Sideways return value from fdopen */ |
| 180 | |
| 181 | /* |
| 182 | * The following two fields are marked XXX since (at least) the |
| 183 | * 4.4BSD-Lite2 import. I can only guess the reason: It is ugly. |
| 184 | * These fields are used to pass the trap code from trapsignal() to |
| 185 | * postsig(), which gets called later from userret(). |
| 186 | * |
| 187 | * The correct "fix" for these XXX is to convert our signal system |
| 188 | * to use signal queues, where each signal can carry its own meta |
| 189 | * data. |
| 190 | */ |
| 191 | int lwp_sig; /* for core dump/debugger XXX */ |
| 192 | u_long lwp_code; /* for core dump/debugger XXX */ |
| 193 | |
| 194 | /* |
| 195 | * Scheduling. |
| 196 | */ |
| 197 | sysclock_t lwp_cpticks; /* cpu used in sched clock ticks */ |
| 198 | sysclock_t lwp_cpbase; /* Measurement base */ |
| 199 | fixpt_t lwp_pctcpu; /* %cpu for this process */ |
| 200 | u_int lwp_slptime; /* Time since last blocked. */ |
| 201 | |
| 202 | int lwp_traceflag; /* Kernel trace points. */ |
| 203 | |
| 204 | struct rusage lwp_ru; /* stats for this lwp */ |
| 205 | |
| 206 | union usched_data lwp_usdata; /* User scheduler specific */ |
| 207 | |
| 208 | #define lwp_startcopy lwp_cpumask |
| 209 | cpumask_t lwp_cpumask; |
| 210 | sigset_t lwp_siglist; /* Signals arrived but not delivered. */ |
| 211 | sigset_t lwp_oldsigmask; /* saved mask from before sigpause */ |
| 212 | sigset_t lwp_sigmask; /* Current signal mask. */ |
| 213 | stack_t lwp_sigstk; /* sp & on stack state variable */ |
| 214 | |
| 215 | struct rtprio lwp_rtprio; /* Realtime priority. */ |
| 216 | #define lwp_endcopy lwp_md |
| 217 | |
| 218 | struct mdproc lwp_md; /* Any machine-dependent fields. */ |
| 219 | |
| 220 | struct thread *lwp_thread; /* backpointer to proc's thread */ |
| 221 | struct upcall *lwp_upcall; /* REGISTERED USERLAND POINTER! */ |
| 222 | struct kqueue lwp_kqueue; /* for select/poll */ |
| 223 | u_int lwp_kqueue_serial; |
| 224 | struct lwkt_token lwp_token; /* per-lwp token for signal/state */ |
| 225 | struct spinlock lwp_spin; /* spinlock for signal handling */ |
| 226 | void *lwp_reserveds1; /* reserved for lwp_saveusp */ |
| 227 | void *lwp_reserveds2; /* reserved for lwp_saveupc */ |
| 228 | }; |
| 229 | |
| 230 | struct proc { |
| 231 | LIST_ENTRY(proc) p_list; /* List of all processes. */ |
| 232 | |
| 233 | /* substructures: */ |
| 234 | struct ucred *p_ucred; /* Process owner's identity. */ |
| 235 | struct filedesc *p_fd; /* Ptr to open files structure. */ |
| 236 | struct filedesc_to_leader *p_fdtol; /* Ptr to tracking node XXX lwp */ |
| 237 | struct plimit *p_limit; /* Process limits. */ |
| 238 | struct pstats *p_stats; |
| 239 | u_int p_mqueue_cnt; /* Count of open mqueues. */ |
| 240 | void *p_pad0; |
| 241 | struct sigacts *p_sigacts; |
| 242 | #define p_sigignore p_sigacts->ps_sigignore |
| 243 | #define p_sigcatch p_sigacts->ps_sigcatch |
| 244 | #define p_rlimit p_limit->pl_rlimit |
| 245 | |
| 246 | int p_flags; /* P_* flags. */ |
| 247 | enum procstat p_stat; /* S* process status. */ |
| 248 | char p_pad1[3]; |
| 249 | |
| 250 | pid_t p_pid; /* Process identifier. */ |
| 251 | LIST_ENTRY(proc) p_hash; /* Hash chain. */ |
| 252 | LIST_ENTRY(proc) p_pglist; /* List of processes in pgrp. */ |
| 253 | struct proc *p_pptr; /* Pointer to parent process. */ |
| 254 | LIST_ENTRY(proc) p_sibling; /* List of sibling processes. */ |
| 255 | struct proclist p_children; /* Pointer to list of children. */ |
| 256 | struct callout p_ithandle; /* for scheduling p_realtimer */ |
| 257 | struct varsymset p_varsymset; |
| 258 | struct iosched_data p_iosdata; /* Dynamic I/O scheduling data */ |
| 259 | |
| 260 | pid_t p_oppid; /* Save parent pid during ptrace. XXX */ |
| 261 | |
| 262 | struct vmspace *p_vmspace; /* Current address space. */ |
| 263 | |
| 264 | unsigned int p_swtime; /* Time swapped in or out */ |
| 265 | |
| 266 | struct itimerval p_realtimer; /* Alarm timer. */ |
| 267 | struct itimerval p_timer[3]; /* Virtual-time timers. */ |
| 268 | |
| 269 | int p_traceflag; /* Kernel trace points. */ |
| 270 | struct ktrace_node *p_tracenode; /* Trace to vnode. */ |
| 271 | |
| 272 | sigset_t p_siglist; /* Signals arrived but not delivered. */ |
| 273 | |
| 274 | struct vnode *p_textvp; /* Vnode of executable. */ |
| 275 | struct nchandle p_textnch; /* namecache handle of executable. */ |
| 276 | |
| 277 | unsigned int p_stops; /* procfs event bitmask */ |
| 278 | unsigned int p_stype; /* procfs stop event type */ |
| 279 | char p_step; /* procfs stop *once* flag */ |
| 280 | unsigned char p_pfsflags; /* procfs flags */ |
| 281 | char p_pad2[2]; /* padding for alignment */ |
| 282 | struct sigiolst p_sigiolst; /* list of sigio sources */ |
| 283 | int p_sigparent; /* signal to parent on exit */ |
| 284 | struct klist p_klist; /* knotes attached to this process */ |
| 285 | |
| 286 | struct timeval p_start; /* start time for a process */ |
| 287 | |
| 288 | struct rusage p_ru; /* stats for this proc */ |
| 289 | struct rusage p_cru; /* sum of stats for reaped children */ |
| 290 | void *p_dsched_priv1; |
| 291 | |
| 292 | /* The following fields are all copied upon creation in fork. */ |
| 293 | #define p_startcopy p_comm |
| 294 | |
| 295 | char p_comm[MAXCOMLEN+1]; /* typ 16+1 bytes */ |
| 296 | char p_pad3; /* Process lock (prevent destruct) count. */ |
| 297 | char p_nice; /* Process "nice" value. */ |
| 298 | char p_pad4; |
| 299 | int p_osrel; /* release date for binary ELF note */ |
| 300 | |
| 301 | struct pgrp *p_pgrp; /* Pointer to process group. */ |
| 302 | |
| 303 | struct sysentvec *p_sysent; /* System call dispatch information. */ |
| 304 | |
| 305 | struct uprof p_prof; /* Profiling arguments. */ |
| 306 | struct rtprio p_rtprio; /* Realtime priority. */ |
| 307 | struct pargs *p_args; |
| 308 | u_short p_xstat; /* Exit status or last stop signal */ |
| 309 | |
| 310 | int p_ionice; |
| 311 | void *p_dsched_priv2; |
| 312 | /* End area that is copied on creation. */ |
| 313 | #define p_endcopy p_dsched_priv2 |
| 314 | u_short p_acflag; /* Accounting flags. */ |
| 315 | |
| 316 | int p_lock; /* Prevent proc destruction */ |
| 317 | int p_nthreads; /* Number of threads in this process. */ |
| 318 | int p_nstopped; /* Number of stopped threads. */ |
| 319 | int p_lasttid; /* Last tid used. */ |
| 320 | struct lwp_rb_tree p_lwp_tree; /* RB tree of LWPs for this process */ |
| 321 | void *p_aioinfo; /* ASYNC I/O info */ |
| 322 | int p_wakeup; /* thread id XXX lwp */ |
| 323 | struct proc *p_peers; /* XXX lwp */ |
| 324 | struct proc *p_leader; /* XXX lwp */ |
| 325 | void *p_emuldata; /* process-specific emulator state */ |
| 326 | struct usched *p_usched; /* Userland scheduling control */ |
| 327 | struct vkernel_proc *p_vkernel; /* VKernel support, proc part */ |
| 328 | int p_numposixlocks; /* number of POSIX locks */ |
| 329 | void (*p_userret)(void);/* p: return-to-user hook */ |
| 330 | |
| 331 | struct spinlock p_spin; /* Spinlock for LWP access to proc */ |
| 332 | struct lwkt_token p_token; /* Token for LWP access to proc */ |
| 333 | }; |
| 334 | |
| 335 | #define lwp_wchan lwp_thread->td_wchan |
| 336 | #define lwp_wmesg lwp_thread->td_wmesg |
| 337 | #define p_session p_pgrp->pg_session |
| 338 | #define p_pgid p_pgrp->pg_id |
| 339 | |
| 340 | /* These flags are kept in p_flags. */ |
| 341 | #define P_ADVLOCK 0x00001 /* Process may hold a POSIX advisory lock */ |
| 342 | #define P_CONTROLT 0x00002 /* Has a controlling terminal */ |
| 343 | #define P_SWAPPEDOUT 0x00004 /* Swapped out of memory */ |
| 344 | #define P_UNUSED3 0x00008 |
| 345 | #define P_PPWAIT 0x00010 /* Parent is waiting for child to exec/exit */ |
| 346 | #define P_PROFIL 0x00020 /* Has started profiling */ |
| 347 | #define P_UNUSED5 0x00040 /* was: Selecting; wakeup/waiting danger */ |
| 348 | #define P_UNUSED4 0x00080 /* was: Sleep is interruptible */ |
| 349 | #define P_SUGID 0x00100 /* Had set id privileges since last exec */ |
| 350 | #define P_SYSTEM 0x00200 /* System proc: no sigs, stats or swapping */ |
| 351 | #define P_UNUSED2 0x00400 /* was: SIGSTOP status */ |
| 352 | #define P_TRACED 0x00800 /* Debugged process being traced */ |
| 353 | #define P_WAITED 0x01000 /* SIGSTOP status was returned by wait3/4 */ |
| 354 | #define P_WEXIT 0x02000 /* Working on exiting (master exit) */ |
| 355 | #define P_EXEC 0x04000 /* Process called exec */ |
| 356 | #define P_CONTINUED 0x08000 /* Proc has continued from a stopped state */ |
| 357 | |
| 358 | #define P_UNUSED16 0x00010000 |
| 359 | #define P_UPCALLPEND 0x00020000 /* an upcall is pending */ |
| 360 | |
| 361 | #define P_SWAPWAIT 0x00040000 /* Waiting for a swapin */ |
| 362 | #define P_UNUSED19 0x00080000 /* was: Now in a zombied state */ |
| 363 | |
| 364 | /* Marked a kernel thread */ |
| 365 | #define P_UNUSED20 0x00100000 /* was: on a user scheduling run queue */ |
| 366 | #define P_KTHREADP 0x00200000 /* Process is really a kernel thread */ |
| 367 | #define P_IDLESWAP 0x00400000 /* Swapout was due to idleswap, not load */ |
| 368 | |
| 369 | #define P_JAILED 0x01000000 /* Process is in jail */ |
| 370 | #define P_SIGVTALRM 0x02000000 /* signal SIGVTALRM pending due to itimer */ |
| 371 | #define P_SIGPROF 0x04000000 /* signal SIGPROF pending due to itimer */ |
| 372 | #define P_INEXEC 0x08000000 /* Process is in execve(). */ |
| 373 | #define P_UNUSED28 0x10000000 |
| 374 | #define P_UPCALLWAIT 0x20000000 /* Wait for upcall or signal */ |
| 375 | #define P_XCPU 0x40000000 /* SIGXCPU */ |
| 376 | |
| 377 | #define LWP_ALTSTACK 0x0000001 /* have alternate signal stack */ |
| 378 | #define LWP_OLDMASK 0x0000002 /* need to restore mask before pause */ |
| 379 | #define LWP_SINTR 0x0000008 /* Sleep is interruptible. */ |
| 380 | #define LWP_SELECT 0x0000010 /* Selecting; wakeup/waiting danger. */ |
| 381 | #define LWP_UNUSED20 0x0000020 |
| 382 | #define LWP_UNUSED40 0x0000040 |
| 383 | #define LWP_UNUSED80 0x0000080 |
| 384 | #define LWP_PASSIVE_ACQ 0x0000100 /* Passive acquire cpu (see kern_switch) */ |
| 385 | #define LWP_PAGING 0x0000200 /* Currently in vm_fault */ |
| 386 | |
| 387 | /* |
| 388 | * LWP_MP_WSTOP: When set the thread will stop prior to return to userland |
| 389 | * and has been counted in the process stop-threads-count, but |
| 390 | * may still be running in kernel-land. |
| 391 | * |
| 392 | * LWP_MP_WEXIT: When set the thread has been asked to exit and will not return |
| 393 | * to userland. p_nthreads will not be decremented until the |
| 394 | * thread has actually exited. |
| 395 | */ |
| 396 | #define LWP_MP_ONRUNQ 0x0000001 /* on a user scheduling run queue */ |
| 397 | #define LWP_MP_WEXIT 0x0000002 /* working on exiting */ |
| 398 | #define LWP_MP_WSTOP 0x0000004 /* working on stopping */ |
| 399 | |
| 400 | #define FIRST_LWP_IN_PROC(p) RB_FIRST(lwp_rb_tree, &(p)->p_lwp_tree) |
| 401 | #define FOREACH_LWP_IN_PROC(lp, p) \ |
| 402 | RB_FOREACH(lp, lwp_rb_tree, &(p)->p_lwp_tree) |
| 403 | #define ONLY_LWP_IN_PROC(p) \ |
| 404 | (p->p_nthreads != 1 && \ |
| 405 | (panic("%s: proc %p (pid %d cmd %s) has more than one thread", \ |
| 406 | __func__, p, p->p_pid, p->p_comm), 1), \ |
| 407 | RB_ROOT(&p->p_lwp_tree)) |
| 408 | |
| 409 | /* |
| 410 | * We use process IDs <= PID_MAX; PID_MAX + 1 must also fit in a pid_t, |
| 411 | * as it is used to represent "no process group". |
| 412 | */ |
| 413 | #define PID_MAX 99999 |
| 414 | #define NO_PID 100000 |
| 415 | |
| 416 | #define SESS_LEADER(p) ((p)->p_session->s_leader == (p)) |
| 417 | |
| 418 | #ifdef _KERNEL |
| 419 | |
| 420 | #ifdef MALLOC_DECLARE |
| 421 | MALLOC_DECLARE(M_SESSION); |
| 422 | MALLOC_DECLARE(M_PROC); |
| 423 | MALLOC_DECLARE(M_LWP); |
| 424 | MALLOC_DECLARE(M_SUBPROC); |
| 425 | MALLOC_DECLARE(M_PARGS); |
| 426 | #endif |
| 427 | |
| 428 | /* for priv_check_cred() */ |
| 429 | #define NULL_CRED_OKAY 0x2 |
| 430 | |
| 431 | /* Handy macro to determine if p1 can mangle p2 */ |
| 432 | |
| 433 | #define PRISON_CHECK(cr1, cr2) \ |
| 434 | ((!(cr1)->cr_prison) || (cr1)->cr_prison == (cr2)->cr_prison) |
| 435 | |
| 436 | /* |
| 437 | * STOPEVENT |
| 438 | */ |
| 439 | extern void stopevent(struct proc*, unsigned int, unsigned int); |
| 440 | #define STOPEVENT(p,e,v) \ |
| 441 | do { \ |
| 442 | if ((p)->p_stops & (e)) { \ |
| 443 | stopevent(p,e,v); \ |
| 444 | } \ |
| 445 | } while (0) |
| 446 | |
| 447 | /* |
| 448 | * Hold process in memory, don't destruct, used by ktrace, procfs, sigio, |
| 449 | * and signaling code (e.g. ksignal()). |
| 450 | * |
| 451 | * MPSAFE |
| 452 | */ |
| 453 | #define PHOLD(p) phold((p)) |
| 454 | #define PRELE(p) prele((p)) |
| 455 | #define PSTALL(p, msg, n) \ |
| 456 | do { if ((p)->p_lock > (n)) pstall((p), (msg), (n)); } while (0) |
| 457 | |
| 458 | /* |
| 459 | * Hold lwp in memory, don't destruct, normally for ptrace/procfs work |
| 460 | * atomic ops because they can occur from an IPI. |
| 461 | * MPSAFE |
| 462 | */ |
| 463 | #define LWPHOLD(lp) atomic_add_int(&(lp)->lwp_lock, 1) |
| 464 | #define LWPRELE(lp) atomic_add_int(&(lp)->lwp_lock, -1) |
| 465 | |
| 466 | #define PIDHASH(pid) (&pidhashtbl[(pid) & pidhash]) |
| 467 | extern LIST_HEAD(pidhashhead, proc) *pidhashtbl; |
| 468 | extern u_long pidhash; |
| 469 | |
| 470 | #define PGRPHASH(pgid) (&pgrphashtbl[(pgid) & pgrphash]) |
| 471 | extern LIST_HEAD(pgrphashhead, pgrp) *pgrphashtbl; |
| 472 | extern u_long pgrphash; |
| 473 | |
| 474 | #if 0 |
| 475 | #ifndef SET_CURPROC |
| 476 | #define SET_CURPROC(p) (curproc = (p)) |
| 477 | #endif |
| 478 | #endif |
| 479 | |
| 480 | extern struct proc proc0; /* Process slot for swapper. */ |
| 481 | extern struct lwp lwp0; /* LWP slot for swapper. */ |
| 482 | extern struct thread thread0; /* Thread slot for swapper. */ |
| 483 | extern int hogticks; /* Limit on kernel cpu hogs. */ |
| 484 | extern int nprocs, maxproc; /* Current and max number of procs. */ |
| 485 | extern int maxprocperuid; /* Max procs per uid. */ |
| 486 | extern int sched_quantum; /* Scheduling quantum in ticks */ |
| 487 | |
| 488 | extern struct proclist allproc; /* List of all processes. */ |
| 489 | extern struct proclist zombproc; /* List of zombie processes. */ |
| 490 | extern struct proc *initproc; /* Process slot for init */ |
| 491 | extern struct thread *pagethread, *updatethread; |
| 492 | |
| 493 | /* |
| 494 | * Scheduler independant variables. The primary scheduler polling frequency, |
| 495 | * the maximum ESTCPU value, and the weighting factor for nice values. A |
| 496 | * cpu bound program's estcpu will increase to ESTCPUMAX - 1. |
| 497 | */ |
| 498 | #define ESTCPUFREQ 50 |
| 499 | |
| 500 | extern u_long ps_arg_cache_limit; |
| 501 | extern int ps_argsopen; |
| 502 | extern int ps_showallprocs; |
| 503 | |
| 504 | struct proc *pfind (pid_t); /* Find process by id w/ref */ |
| 505 | struct proc *pfindn (pid_t); /* Find process by id wo/ref */ |
| 506 | struct pgrp *pgfind (pid_t); /* Find process group by id w/ref */ |
| 507 | struct proc *zpfind (pid_t); /* Find zombie process by id w/ref */ |
| 508 | void pgref (struct pgrp *); /* Ref pgrp preventing disposal */ |
| 509 | void pgrel (struct pgrp *); /* Deref pgrp & dispose on 1->0 trans */ |
| 510 | |
| 511 | struct globaldata; |
| 512 | struct lwp_params; |
| 513 | |
| 514 | int enterpgrp (struct proc *p, pid_t pgid, int mksess); |
| 515 | void proc_add_allproc(struct proc *p); |
| 516 | void proc_move_allproc_zombie(struct proc *); |
| 517 | void proc_remove_zombie(struct proc *); |
| 518 | void allproc_scan(int (*callback)(struct proc *, void *), void *data); |
| 519 | void alllwp_scan(int (*callback)(struct lwp *, void *), void *data); |
| 520 | void zombproc_scan(int (*callback)(struct proc *, void *), void *data); |
| 521 | void fixjobc (struct proc *p, struct pgrp *pgrp, int entering); |
| 522 | void updatepcpu(struct lwp *, int, int); |
| 523 | int inferior (struct proc *p); |
| 524 | int leavepgrp (struct proc *p); |
| 525 | void sess_hold(struct session *sp); |
| 526 | void sess_rele(struct session *sp); |
| 527 | void procinit (void); |
| 528 | void relscurproc(struct proc *curp); |
| 529 | int p_trespass (struct ucred *cr1, struct ucred *cr2); |
| 530 | void setrunnable (struct lwp *); |
| 531 | void proc_stop (struct proc *); |
| 532 | void proc_unstop (struct proc *); |
| 533 | void sleep_gdinit (struct globaldata *); |
| 534 | int suser (struct thread *td); |
| 535 | int suser_cred (struct ucred *cred, int flag); |
| 536 | thread_t cpu_heavy_switch (struct thread *); |
| 537 | thread_t cpu_lwkt_switch (struct thread *); |
| 538 | |
| 539 | void cpu_lwp_exit (void) __dead2; |
| 540 | void cpu_thread_exit (void) __dead2; |
| 541 | void lwp_exit (int masterexit) __dead2; |
| 542 | void lwp_dispose (struct lwp *); |
| 543 | int killalllwps (int); |
| 544 | void exit1 (int) __dead2; |
| 545 | void cpu_fork (struct lwp *, struct lwp *, int); |
| 546 | int cpu_prepare_lwp(struct lwp *, struct lwp_params *); |
| 547 | void cpu_set_fork_handler (struct lwp *, void (*)(void *, struct trapframe *), void *); |
| 548 | void cpu_set_thread_handler(struct thread *td, void (*retfunc)(void), void *func, void *arg); |
| 549 | int fork1 (struct lwp *, int, struct proc **); |
| 550 | void start_forked_proc (struct lwp *, struct proc *); |
| 551 | int trace_req (struct proc *); |
| 552 | void cpu_thread_wait (struct thread *); |
| 553 | void setsugid (void); |
| 554 | void faultin (struct proc *p); |
| 555 | void swapin_request (void); |
| 556 | void phold (struct proc *); |
| 557 | void prele (struct proc *); |
| 558 | void pstall (struct proc *, const char *, int); |
| 559 | |
| 560 | u_int32_t procrunnable (void); |
| 561 | |
| 562 | #endif /* _KERNEL */ |
| 563 | |
| 564 | #endif /* _KERNEL || _KERNEL_STRUCTURES */ |
| 565 | #endif /* !_SYS_PROC_H_ */ |