sys/kern/kern_proc.c

   1 /*-
   2  * Copyright (c) 1982, 1986, 1989, 1991, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 4. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  *      @(#)kern_proc.c 8.7 (Berkeley) 2/14/95
  30  */
  31
  32 #include <sys/cdefs.h>
  33 __FBSDID("$FreeBSD$");
  34
  35 #include "opt_compat.h"
  36 #include "opt_ddb.h"
  37 #include "opt_kdtrace.h"
  38 #include "opt_ktrace.h"
  39 #include "opt_kstack_pages.h"
  40 #include "opt_stack.h"
  41
  42 #include <sys/param.h>
  43 #include <sys/systm.h>
  44 #include <sys/kernel.h>
  45 #include <sys/lock.h>
  46 #include <sys/malloc.h>
  47 #include <sys/mount.h>
  48 #include <sys/mutex.h>
  49 #include <sys/proc.h>
  50 #include <sys/refcount.h>
  51 #include <sys/sbuf.h>
  52 #include <sys/sysent.h>
  53 #include <sys/sched.h>
  54 #include <sys/smp.h>
  55 #include <sys/stack.h>
  56 #include <sys/sysctl.h>
  57 #include <sys/filedesc.h>
  58 #include <sys/tty.h>
  59 #include <sys/sdt.h>
  60 #include <sys/signalvar.h>
  61 #include <sys/sx.h>
  62 #include <sys/user.h>
  63 #include <sys/jail.h>
  64 #include <sys/vnode.h>
  65 #include <sys/eventhandler.h>
  66 #ifdef KTRACE
  67 #include <sys/uio.h>
  68 #include <sys/ktrace.h>
  69 #endif
  70
  71 #ifdef DDB
  72 #include <ddb/ddb.h>
  73 #endif
  74
  75 #include <vm/vm.h>
  76 #include <vm/vm_extern.h>
  77 #include <vm/pmap.h>
  78 #include <vm/vm_map.h>
  79 #include <vm/vm_object.h>
  80 #include <vm/uma.h>
  81
  82 SDT_PROVIDER_DEFINE(proc);
  83 SDT_PROBE_DEFINE(proc, kernel, ctor, entry);
  84 SDT_PROBE_ARGTYPE(proc, kernel, ctor, entry, 0, "struct proc *");
  85 SDT_PROBE_ARGTYPE(proc, kernel, ctor, entry, 1, "int");
  86 SDT_PROBE_ARGTYPE(proc, kernel, ctor, entry, 2, "void *");
  87 SDT_PROBE_ARGTYPE(proc, kernel, ctor, entry, 3, "int");
  88 SDT_PROBE_DEFINE(proc, kernel, ctor, return);
  89 SDT_PROBE_ARGTYPE(proc, kernel, ctor, return, 0, "struct proc *");
  90 SDT_PROBE_ARGTYPE(proc, kernel, ctor, return, 1, "int");
  91 SDT_PROBE_ARGTYPE(proc, kernel, ctor, return, 2, "void *");
  92 SDT_PROBE_ARGTYPE(proc, kernel, ctor, return, 3, "int");
  93 SDT_PROBE_DEFINE(proc, kernel, dtor, entry);
  94 SDT_PROBE_ARGTYPE(proc, kernel, dtor, entry, 0, "struct proc *");
  95 SDT_PROBE_ARGTYPE(proc, kernel, dtor, entry, 1, "int");
  96 SDT_PROBE_ARGTYPE(proc, kernel, dtor, entry, 2, "void *");
  97 SDT_PROBE_ARGTYPE(proc, kernel, dtor, entry, 3, "struct thread *");
  98 SDT_PROBE_DEFINE(proc, kernel, dtor, return);
  99 SDT_PROBE_ARGTYPE(proc, kernel, dtor, return, 0, "struct proc *");
 100 SDT_PROBE_ARGTYPE(proc, kernel, dtor, return, 1, "int");
 101 SDT_PROBE_ARGTYPE(proc, kernel, dtor, return, 2, "void *");
 102 SDT_PROBE_DEFINE(proc, kernel, init, entry);
 103 SDT_PROBE_ARGTYPE(proc, kernel, init, entry, 0, "struct proc *");
 104 SDT_PROBE_ARGTYPE(proc, kernel, init, entry, 1, "int");
 105 SDT_PROBE_ARGTYPE(proc, kernel, init, entry, 2, "int");
 106 SDT_PROBE_DEFINE(proc, kernel, init, return);
 107 SDT_PROBE_ARGTYPE(proc, kernel, init, return, 0, "struct proc *");
 108 SDT_PROBE_ARGTYPE(proc, kernel, init, return, 1, "int");
 109 SDT_PROBE_ARGTYPE(proc, kernel, init, return, 2, "int");
 110
 111 MALLOC_DEFINE(M_PGRP, "pgrp", "process group header");
 112 MALLOC_DEFINE(M_SESSION, "session", "session header");
 113 static MALLOC_DEFINE(M_PROC, "proc", "Proc structures");
 114 MALLOC_DEFINE(M_SUBPROC, "subproc", "Proc sub-structures");
 115
 116 static void doenterpgrp(struct proc *, struct pgrp *);
 117 static void orphanpg(struct pgrp *pg);
 118 static void fill_kinfo_proc_only(struct proc *p, struct kinfo_proc *kp);
 119 static void fill_kinfo_thread(struct thread *td, struct kinfo_proc *kp,
 120     int preferthread);
 121 static void pgadjustjobc(struct pgrp *pgrp, int entering);
 122 static void pgdelete(struct pgrp *);
 123 static int proc_ctor(void *mem, int size, void *arg, int flags);
 124 static void proc_dtor(void *mem, int size, void *arg);
 125 static int proc_init(void *mem, int size, int flags);
 126 static void proc_fini(void *mem, int size);
 127 static void pargs_free(struct pargs *pa);
 128
 129 /*
 130  * Other process lists
 131  */
 132 struct pidhashhead *pidhashtbl;
 133 u_long pidhash;
 134 struct pgrphashhead *pgrphashtbl;
 135 u_long pgrphash;
 136 struct proclist allproc;
 137 struct proclist zombproc;
 138 struct sx allproc_lock;
 139 struct sx proctree_lock;
 140 struct mtx ppeers_lock;
 141 uma_zone_t proc_zone;
 142 uma_zone_t ithread_zone;
 143
 144 int kstack_pages = KSTACK_PAGES;
 145 SYSCTL_INT(_kern, OID_AUTO, kstack_pages, CTLFLAG_RD, &kstack_pages, 0, "");
 146
 147 CTASSERT(sizeof(struct kinfo_proc) == KINFO_PROC_SIZE);
 148
 149 /*
 150  * Initialize global process hashing structures.
 151  */
 152 void
 153 procinit()
 154 {
 155
 156         sx_init(&allproc_lock, "allproc");
 157         sx_init(&proctree_lock, "proctree");
 158         mtx_init(&ppeers_lock, "p_peers", NULL, MTX_DEF);
 159         LIST_INIT(&allproc);
 160         LIST_INIT(&zombproc);
 161         pidhashtbl = hashinit(maxproc / 4, M_PROC, &pidhash);
 162         pgrphashtbl = hashinit(maxproc / 4, M_PROC, &pgrphash);
 163         proc_zone = uma_zcreate("PROC", sched_sizeof_proc(),
 164             proc_ctor, proc_dtor, proc_init, proc_fini,
 165             UMA_ALIGN_PTR, UMA_ZONE_NOFREE);
 166         uihashinit();
 167 }
 168
 169 /*
 170  * Prepare a proc for use.
 171  */
 172 static int
 173 proc_ctor(void *mem, int size, void *arg, int flags)
 174 {
 175         struct proc *p;
 176
 177         p = (struct proc *)mem;
 178         SDT_PROBE(proc, kernel, ctor, entry, p, size, arg, flags, 0);
 179         EVENTHANDLER_INVOKE(process_ctor, p);
 180         SDT_PROBE(proc, kernel, ctor, return, p, size, arg, flags, 0);
 181         return (0);
 182 }
 183
 184 /*
 185  * Reclaim a proc after use.
 186  */
 187 static void
 188 proc_dtor(void *mem, int size, void *arg)
 189 {
 190         struct proc *p;
 191         struct thread *td;
 192
 193         /* INVARIANTS checks go here */
 194         p = (struct proc *)mem;
 195         td = FIRST_THREAD_IN_PROC(p);
 196         SDT_PROBE(proc, kernel, dtor, entry, p, size, arg, td, 0);
 197         if (td != NULL) {
 198 #ifdef INVARIANTS
 199                 KASSERT((p->p_numthreads == 1),
 200                     ("bad number of threads in exiting process"));
 201                 KASSERT(STAILQ_EMPTY(&p->p_ktr), ("proc_dtor: non-empty p_ktr"));
 202 #endif
 203
 204                 /* Dispose of an alternate kstack, if it exists.
 205                  * XXX What if there are more than one thread in the proc?
 206                  *     The first thread in the proc is special and not
 207                  *     freed, so you gotta do this here.
 208                  */
 209                 if (((p->p_flag & P_KTHREAD) != 0) && (td->td_altkstack != 0))
 210                         vm_thread_dispose_altkstack(td);
 211         }
 212         EVENTHANDLER_INVOKE(process_dtor, p);
 213         if (p->p_ksi != NULL)
 214                 KASSERT(! KSI_ONQ(p->p_ksi), ("SIGCHLD queue"));
 215         SDT_PROBE(proc, kernel, dtor, return, p, size, arg, 0, 0);
 216 }
 217
 218 /*
 219  * Initialize type-stable parts of a proc (when newly created).
 220  */
 221 static int
 222 proc_init(void *mem, int size, int flags)
 223 {
 224         struct proc *p;
 225
 226         p = (struct proc *)mem;
 227         SDT_PROBE(proc, kernel, init, entry, p, size, flags, 0, 0);
 228         p->p_sched = (struct p_sched *)&p[1];
 229         bzero(&p->p_mtx, sizeof(struct mtx));
 230         mtx_init(&p->p_mtx, "process lock", NULL, MTX_DEF | MTX_DUPOK);
 231         mtx_init(&p->p_slock, "process slock", NULL, MTX_SPIN | MTX_RECURSE);
 232         TAILQ_INIT(&p->p_threads);           /* all threads in proc */
 233         EVENTHANDLER_INVOKE(process_init, p);
 234         p->p_stats = pstats_alloc();
 235         SDT_PROBE(proc, kernel, init, return, p, size, flags, 0, 0);
 236         return (0);
 237 }
 238
 239 /*
 240  * UMA should ensure that this function is never called.
 241  * Freeing a proc structure would violate type stability.
 242  */
 243 static void
 244 proc_fini(void *mem, int size)
 245 {
 246 #ifdef notnow
 247         struct proc *p;
 248
 249         p = (struct proc *)mem;
 250         EVENTHANDLER_INVOKE(process_fini, p);
 251         pstats_free(p->p_stats);
 252         thread_free(FIRST_THREAD_IN_PROC(p));
 253         mtx_destroy(&p->p_mtx);
 254         if (p->p_ksi != NULL)
 255                 ksiginfo_free(p->p_ksi);
 256 #else
 257         panic("proc reclaimed");
 258 #endif
 259 }
 260
 261 /*
 262  * Is p an inferior of the current process?
 263  */
 264 int
 265 inferior(p)
 266         register struct proc *p;
 267 {
 268
 269         sx_assert(&proctree_lock, SX_LOCKED);
 270         for (; p != curproc; p = p->p_pptr)
 271                 if (p->p_pid == 0)
 272                         return (0);
 273         return (1);
 274 }
 275
 276 /*
 277  * Locate a process by number; return only "live" processes -- i.e., neither
 278  * zombies nor newly born but incompletely initialized processes.  By not
 279  * returning processes in the PRS_NEW state, we allow callers to avoid
 280  * testing for that condition to avoid dereferencing p_ucred, et al.
 281  */
 282 struct proc *
 283 pfind(pid)
 284         register pid_t pid;
 285 {
 286         register struct proc *p;
 287
 288         sx_slock(&allproc_lock);
 289         LIST_FOREACH(p, PIDHASH(pid), p_hash)
 290                 if (p->p_pid == pid) {
 291                         if (p->p_state == PRS_NEW) {
 292                                 p = NULL;
 293                                 break;
 294                         }
 295                         PROC_LOCK(p);
 296                         break;
 297                 }
 298         sx_sunlock(&allproc_lock);
 299         return (p);
 300 }
 301
 302 /*
 303  * Locate a process group by number.
 304  * The caller must hold proctree_lock.
 305  */
 306 struct pgrp *
 307 pgfind(pgid)
 308         register pid_t pgid;
 309 {
 310         register struct pgrp *pgrp;
 311
 312         sx_assert(&proctree_lock, SX_LOCKED);
 313
 314         LIST_FOREACH(pgrp, PGRPHASH(pgid), pg_hash) {
 315                 if (pgrp->pg_id == pgid) {
 316                         PGRP_LOCK(pgrp);
 317                         return (pgrp);
 318                 }
 319         }
 320         return (NULL);
 321 }
 322
 323 /*
 324  * Create a new process group.
 325  * pgid must be equal to the pid of p.
 326  * Begin a new session if required.
 327  */
 328 int
 329 enterpgrp(p, pgid, pgrp, sess)
 330         register struct proc *p;
 331         pid_t pgid;
 332         struct pgrp *pgrp;
 333         struct session *sess;
 334 {
 335         struct pgrp *pgrp2;
 336
 337         sx_assert(&proctree_lock, SX_XLOCKED);
 338
 339         KASSERT(pgrp != NULL, ("enterpgrp: pgrp == NULL"));
 340         KASSERT(p->p_pid == pgid,
 341             ("enterpgrp: new pgrp and pid != pgid"));
 342
 343         pgrp2 = pgfind(pgid);
 344
 345         KASSERT(pgrp2 == NULL,
 346             ("enterpgrp: pgrp with pgid exists"));
 347         KASSERT(!SESS_LEADER(p),
 348             ("enterpgrp: session leader attempted setpgrp"));
 349
 350         mtx_init(&pgrp->pg_mtx, "process group", NULL, MTX_DEF | MTX_DUPOK);
 351
 352         if (sess != NULL) {
 353                 /*
 354                  * new session
 355                  */
 356                 mtx_init(&sess->s_mtx, "session", NULL, MTX_DEF);
 357                 mtx_lock(&Giant);       /* XXX TTY */
 358                 PROC_LOCK(p);
 359                 p->p_flag &= ~P_CONTROLT;
 360                 PROC_UNLOCK(p);
 361                 PGRP_LOCK(pgrp);
 362                 sess->s_leader = p;
 363                 sess->s_sid = p->p_pid;
 364                 sess->s_count = 1;
 365                 sess->s_ttyvp = NULL;
 366                 sess->s_ttyp = NULL;
 367                 bcopy(p->p_session->s_login, sess->s_login,
 368                             sizeof(sess->s_login));
 369                 pgrp->pg_session = sess;
 370                 KASSERT(p == curproc,
 371                     ("enterpgrp: mksession and p != curproc"));
 372         } else {
 373                 mtx_lock(&Giant);       /* XXX TTY */
 374                 pgrp->pg_session = p->p_session;
 375                 SESS_LOCK(pgrp->pg_session);
 376                 pgrp->pg_session->s_count++;
 377                 SESS_UNLOCK(pgrp->pg_session);
 378                 PGRP_LOCK(pgrp);
 379         }
 380         pgrp->pg_id = pgid;
 381         LIST_INIT(&pgrp->pg_members);
 382
 383         /*
 384          * As we have an exclusive lock of proctree_lock,
 385          * this should not deadlock.
 386          */
 387         LIST_INSERT_HEAD(PGRPHASH(pgid), pgrp, pg_hash);
 388         pgrp->pg_jobc = 0;
 389         SLIST_INIT(&pgrp->pg_sigiolst);
 390         PGRP_UNLOCK(pgrp);
 391         mtx_unlock(&Giant);       /* XXX TTY */
 392
 393         doenterpgrp(p, pgrp);
 394
 395         return (0);
 396 }
 397
 398 /*
 399  * Move p to an existing process group
 400  */
 401 int
 402 enterthispgrp(p, pgrp)
 403         register struct proc *p;
 404         struct pgrp *pgrp;
 405 {
 406
 407         sx_assert(&proctree_lock, SX_XLOCKED);
 408         PROC_LOCK_ASSERT(p, MA_NOTOWNED);
 409         PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED);
 410         PGRP_LOCK_ASSERT(p->p_pgrp, MA_NOTOWNED);
 411         SESS_LOCK_ASSERT(p->p_session, MA_NOTOWNED);
 412         KASSERT(pgrp->pg_session == p->p_session,
 413                 ("%s: pgrp's session %p, p->p_session %p.\n",
 414                 __func__,
 415                 pgrp->pg_session,
 416                 p->p_session));
 417         KASSERT(pgrp != p->p_pgrp,
 418                 ("%s: p belongs to pgrp.", __func__));
 419
 420         doenterpgrp(p, pgrp);
 421
 422         return (0);
 423 }
 424
 425 /*
 426  * Move p to a process group
 427  */
 428 static void
 429 doenterpgrp(p, pgrp)
 430         struct proc *p;
 431         struct pgrp *pgrp;
 432 {
 433         struct pgrp *savepgrp;
 434
 435         sx_assert(&proctree_lock, SX_XLOCKED);
 436         PROC_LOCK_ASSERT(p, MA_NOTOWNED);
 437         PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED);
 438         PGRP_LOCK_ASSERT(p->p_pgrp, MA_NOTOWNED);
 439         SESS_LOCK_ASSERT(p->p_session, MA_NOTOWNED);
 440
 441         savepgrp = p->p_pgrp;
 442
 443         /*
 444          * Adjust eligibility of affected pgrps to participate in job control.
 445          * Increment eligibility counts before decrementing, otherwise we
 446          * could reach 0 spuriously during the first call.
 447          */
 448         fixjobc(p, pgrp, 1);
 449         fixjobc(p, p->p_pgrp, 0);
 450
 451         mtx_lock(&Giant);       /* XXX TTY */
 452         PGRP_LOCK(pgrp);
 453         PGRP_LOCK(savepgrp);
 454         PROC_LOCK(p);
 455         LIST_REMOVE(p, p_pglist);
 456         p->p_pgrp = pgrp;
 457         PROC_UNLOCK(p);
 458         LIST_INSERT_HEAD(&pgrp->pg_members, p, p_pglist);
 459         PGRP_UNLOCK(savepgrp);
 460         PGRP_UNLOCK(pgrp);
 461         mtx_unlock(&Giant);     /* XXX TTY */
 462         if (LIST_EMPTY(&savepgrp->pg_members))
 463                 pgdelete(savepgrp);
 464 }
 465
 466 /*
 467  * remove process from process group
 468  */
 469 int
 470 leavepgrp(p)
 471         register struct proc *p;
 472 {
 473         struct pgrp *savepgrp;
 474
 475         sx_assert(&proctree_lock, SX_XLOCKED);
 476         savepgrp = p->p_pgrp;
 477         mtx_lock(&Giant);       /* XXX TTY */
 478         PGRP_LOCK(savepgrp);
 479         PROC_LOCK(p);
 480         LIST_REMOVE(p, p_pglist);
 481         p->p_pgrp = NULL;
 482         PROC_UNLOCK(p);
 483         PGRP_UNLOCK(savepgrp);
 484         mtx_unlock(&Giant);     /* XXX TTY */
 485         if (LIST_EMPTY(&savepgrp->pg_members))
 486                 pgdelete(savepgrp);
 487         return (0);
 488 }
 489
 490 /*
 491  * delete a process group
 492  */
 493 static void
 494 pgdelete(pgrp)
 495         register struct pgrp *pgrp;
 496 {
 497         struct session *savesess;
 498
 499         sx_assert(&proctree_lock, SX_XLOCKED);
 500         PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED);
 501         SESS_LOCK_ASSERT(pgrp->pg_session, MA_NOTOWNED);
 502
 503         /*
 504          * Reset any sigio structures pointing to us as a result of
 505          * F_SETOWN with our pgid.
 506          */
 507         funsetownlst(&pgrp->pg_sigiolst);
 508
 509         mtx_lock(&Giant);       /* XXX TTY */
 510         PGRP_LOCK(pgrp);
 511         if (pgrp->pg_session->s_ttyp != NULL &&
 512             pgrp->pg_session->s_ttyp->t_pgrp == pgrp)
 513                 pgrp->pg_session->s_ttyp->t_pgrp = NULL;
 514         LIST_REMOVE(pgrp, pg_hash);
 515         savesess = pgrp->pg_session;
 516         SESSRELE(savesess);
 517         PGRP_UNLOCK(pgrp);
 518         mtx_destroy(&pgrp->pg_mtx);
 519         FREE(pgrp, M_PGRP);
 520         mtx_unlock(&Giant);     /* XXX TTY */
 521 }
 522
 523 static void
 524 pgadjustjobc(pgrp, entering)
 525         struct pgrp *pgrp;
 526         int entering;
 527 {
 528
 529         PGRP_LOCK(pgrp);
 530         if (entering)
 531                 pgrp->pg_jobc++;
 532         else {
 533                 --pgrp->pg_jobc;
 534                 if (pgrp->pg_jobc == 0)
 535                         orphanpg(pgrp);
 536         }
 537         PGRP_UNLOCK(pgrp);
 538 }
 539
 540 /*
 541  * Adjust pgrp jobc counters when specified process changes process group.
 542  * We count the number of processes in each process group that "qualify"
 543  * the group for terminal job control (those with a parent in a different
 544  * process group of the same session).  If that count reaches zero, the
 545  * process group becomes orphaned.  Check both the specified process'
 546  * process group and that of its children.
 547  * entering == 0 => p is leaving specified group.
 548  * entering == 1 => p is entering specified group.
 549  */
 550 void
 551 fixjobc(p, pgrp, entering)
 552         register struct proc *p;
 553         register struct pgrp *pgrp;
 554         int entering;
 555 {
 556         register struct pgrp *hispgrp;
 557         register struct session *mysession;
 558
 559         sx_assert(&proctree_lock, SX_LOCKED);
 560         PROC_LOCK_ASSERT(p, MA_NOTOWNED);
 561         PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED);
 562         SESS_LOCK_ASSERT(pgrp->pg_session, MA_NOTOWNED);
 563
 564         /*
 565          * Check p's parent to see whether p qualifies its own process
 566          * group; if so, adjust count for p's process group.
 567          */
 568         mysession = pgrp->pg_session;
 569         if ((hispgrp = p->p_pptr->p_pgrp) != pgrp &&
 570             hispgrp->pg_session == mysession)
 571                 pgadjustjobc(pgrp, entering);
 572
 573         /*
 574          * Check this process' children to see whether they qualify
 575          * their process groups; if so, adjust counts for children's
 576          * process groups.
 577          */
 578         LIST_FOREACH(p, &p->p_children, p_sibling) {
 579                 hispgrp = p->p_pgrp;
 580                 if (hispgrp == pgrp ||
 581                     hispgrp->pg_session != mysession)
 582                         continue;
 583                 PROC_LOCK(p);
 584                 if (p->p_state == PRS_ZOMBIE) {
 585                         PROC_UNLOCK(p);
 586                         continue;
 587                 }
 588                 PROC_UNLOCK(p);
 589                 pgadjustjobc(hispgrp, entering);
 590         }
 591 }
 592
 593 /*
 594  * A process group has become orphaned;
 595  * if there are any stopped processes in the group,
 596  * hang-up all process in that group.
 597  */
 598 static void
 599 orphanpg(pg)
 600         struct pgrp *pg;
 601 {
 602         register struct proc *p;
 603
 604         PGRP_LOCK_ASSERT(pg, MA_OWNED);
 605
 606         LIST_FOREACH(p, &pg->pg_members, p_pglist) {
 607                 PROC_LOCK(p);
 608                 if (P_SHOULDSTOP(p)) {
 609                         PROC_UNLOCK(p);
 610                         LIST_FOREACH(p, &pg->pg_members, p_pglist) {
 611                                 PROC_LOCK(p);
 612                                 psignal(p, SIGHUP);
 613                                 psignal(p, SIGCONT);
 614                                 PROC_UNLOCK(p);
 615                         }
 616                         return;
 617                 }
 618                 PROC_UNLOCK(p);
 619         }
 620 }
 621
 622 void
 623 sessrele(struct session *s)
 624 {
 625         int i;
 626
 627         SESS_LOCK(s);
 628         i = --s->s_count;
 629         SESS_UNLOCK(s);
 630         if (i == 0) {
 631                 if (s->s_ttyp != NULL)
 632                         ttyrel(s->s_ttyp);
 633                 mtx_destroy(&s->s_mtx);
 634                 FREE(s, M_SESSION);
 635         }
 636 }
 637
 638 #include "opt_ddb.h"
 639 #ifdef DDB
 640 #include <ddb/ddb.h>
 641
 642 DB_SHOW_COMMAND(pgrpdump, pgrpdump)
 643 {
 644         register struct pgrp *pgrp;
 645         register struct proc *p;
 646         register int i;
 647
 648         for (i = 0; i <= pgrphash; i++) {
 649                 if (!LIST_EMPTY(&pgrphashtbl[i])) {
 650                         printf("\tindx %d\n", i);
 651                         LIST_FOREACH(pgrp, &pgrphashtbl[i], pg_hash) {
 652                                 printf(
 653                         "\tpgrp %p, pgid %ld, sess %p, sesscnt %d, mem %p\n",
 654                                     (void *)pgrp, (long)pgrp->pg_id,
 655                                     (void *)pgrp->pg_session,
 656                                     pgrp->pg_session->s_count,
 657                                     (void *)LIST_FIRST(&pgrp->pg_members));
 658                                 LIST_FOREACH(p, &pgrp->pg_members, p_pglist) {
 659                                         printf("\t\tpid %ld addr %p pgrp %p\n",
 660                                             (long)p->p_pid, (void *)p,
 661                                             (void *)p->p_pgrp);
 662                                 }
 663                         }
 664                 }
 665         }
 666 }
 667 #endif /* DDB */
 668
 669 /*
 670  * Clear kinfo_proc and fill in any information that is common
 671  * to all threads in the process.
 672  * Must be called with the target process locked.
 673  */
 674 static void
 675 fill_kinfo_proc_only(struct proc *p, struct kinfo_proc *kp)
 676 {
 677         struct thread *td0;
 678         struct tty *tp;
 679         struct session *sp;
 680         struct ucred *cred;
 681         struct sigacts *ps;
 682
 683         bzero(kp, sizeof(*kp));
 684
 685         kp->ki_structsize = sizeof(*kp);
 686         kp->ki_paddr = p;
 687         PROC_LOCK_ASSERT(p, MA_OWNED);
 688         kp->ki_addr =/* p->p_addr; */0; /* XXXKSE */
 689         kp->ki_args = p->p_args;
 690         kp->ki_textvp = p->p_textvp;
 691 #ifdef KTRACE
 692         kp->ki_tracep = p->p_tracevp;
 693         mtx_lock(&ktrace_mtx);
 694         kp->ki_traceflag = p->p_traceflag;
 695         mtx_unlock(&ktrace_mtx);
 696 #endif
 697         kp->ki_fd = p->p_fd;
 698         kp->ki_vmspace = p->p_vmspace;
 699         kp->ki_flag = p->p_flag;
 700         cred = p->p_ucred;
 701         if (cred) {
 702                 kp->ki_uid = cred->cr_uid;
 703                 kp->ki_ruid = cred->cr_ruid;
 704                 kp->ki_svuid = cred->cr_svuid;
 705                 /* XXX bde doesn't like KI_NGROUPS */
 706                 kp->ki_ngroups = min(cred->cr_ngroups, KI_NGROUPS);
 707                 bcopy(cred->cr_groups, kp->ki_groups,
 708                     kp->ki_ngroups * sizeof(gid_t));
 709                 kp->ki_rgid = cred->cr_rgid;
 710                 kp->ki_svgid = cred->cr_svgid;
 711                 /* If jailed(cred), emulate the old P_JAILED flag. */
 712                 if (jailed(cred)) {
 713                         kp->ki_flag |= P_JAILED;
 714                         /* If inside a jail, use 0 as a jail ID. */
 715                         if (!jailed(curthread->td_ucred))
 716                                 kp->ki_jid = cred->cr_prison->pr_id;
 717                 }
 718         }
 719         ps = p->p_sigacts;
 720         if (ps) {
 721                 mtx_lock(&ps->ps_mtx);
 722                 kp->ki_sigignore = ps->ps_sigignore;
 723                 kp->ki_sigcatch = ps->ps_sigcatch;
 724                 mtx_unlock(&ps->ps_mtx);
 725         }
 726         PROC_SLOCK(p);
 727         if (p->p_state != PRS_NEW &&
 728             p->p_state != PRS_ZOMBIE &&
 729             p->p_vmspace != NULL) {
 730                 struct vmspace *vm = p->p_vmspace;
 731
 732                 kp->ki_size = vm->vm_map.size;
 733                 kp->ki_rssize = vmspace_resident_count(vm); /*XXX*/
 734                 FOREACH_THREAD_IN_PROC(p, td0) {
 735                         if (!TD_IS_SWAPPED(td0))
 736                                 kp->ki_rssize += td0->td_kstack_pages;
 737                         if (td0->td_altkstack_obj != NULL)
 738                                 kp->ki_rssize += td0->td_altkstack_pages;
 739                 }
 740                 kp->ki_swrss = vm->vm_swrss;
 741                 kp->ki_tsize = vm->vm_tsize;
 742                 kp->ki_dsize = vm->vm_dsize;
 743                 kp->ki_ssize = vm->vm_ssize;
 744         } else if (p->p_state == PRS_ZOMBIE)
 745                 kp->ki_stat = SZOMB;
 746         if (kp->ki_flag & P_INMEM)
 747                 kp->ki_sflag = PS_INMEM;
 748         else
 749                 kp->ki_sflag = 0;
 750         /* Calculate legacy swtime as seconds since 'swtick'. */
 751         kp->ki_swtime = (ticks - p->p_swtick) / hz;
 752         kp->ki_pid = p->p_pid;
 753         kp->ki_nice = p->p_nice;
 754         rufetch(p, &kp->ki_rusage);
 755         kp->ki_runtime = cputick2usec(p->p_rux.rux_runtime);
 756         PROC_SUNLOCK(p);
 757         if ((p->p_flag & P_INMEM) && p->p_stats != NULL) {
 758                 kp->ki_start = p->p_stats->p_start;
 759                 timevaladd(&kp->ki_start, &boottime);
 760                 PROC_SLOCK(p);
 761                 calcru(p, &kp->ki_rusage.ru_utime, &kp->ki_rusage.ru_stime);
 762                 PROC_SUNLOCK(p);
 763                 calccru(p, &kp->ki_childutime, &kp->ki_childstime);
 764
 765                 /* Some callers want child-times in a single value */
 766                 kp->ki_childtime = kp->ki_childstime;
 767                 timevaladd(&kp->ki_childtime, &kp->ki_childutime);
 768         }
 769         tp = NULL;
 770         if (p->p_pgrp) {
 771                 kp->ki_pgid = p->p_pgrp->pg_id;
 772                 kp->ki_jobc = p->p_pgrp->pg_jobc;
 773                 sp = p->p_pgrp->pg_session;
 774
 775                 if (sp != NULL) {
 776                         kp->ki_sid = sp->s_sid;
 777                         SESS_LOCK(sp);
 778                         strlcpy(kp->ki_login, sp->s_login,
 779                             sizeof(kp->ki_login));
 780                         if (sp->s_ttyvp)
 781                                 kp->ki_kiflag |= KI_CTTY;
 782                         if (SESS_LEADER(p))
 783                                 kp->ki_kiflag |= KI_SLEADER;
 784                         tp = sp->s_ttyp;
 785                         SESS_UNLOCK(sp);
 786                 }
 787         }
 788         if ((p->p_flag & P_CONTROLT) && tp != NULL) {
 789                 kp->ki_tdev = dev2udev(tp->t_dev);
 790                 kp->ki_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID;
 791                 if (tp->t_session)
 792                         kp->ki_tsid = tp->t_session->s_sid;
 793         } else
 794                 kp->ki_tdev = NODEV;
 795         if (p->p_comm[0] != '\0')
 796                 strlcpy(kp->ki_comm, p->p_comm, sizeof(kp->ki_comm));
 797         if (p->p_sysent && p->p_sysent->sv_name != NULL &&
 798             p->p_sysent->sv_name[0] != '\0')
 799                 strlcpy(kp->ki_emul, p->p_sysent->sv_name, sizeof(kp->ki_emul));
 800         kp->ki_siglist = p->p_siglist;
 801         kp->ki_xstat = p->p_xstat;
 802         kp->ki_acflag = p->p_acflag;
 803         kp->ki_lock = p->p_lock;
 804         if (p->p_pptr)
 805                 kp->ki_ppid = p->p_pptr->p_pid;
 806 }
 807
 808 /*
 809  * Fill in information that is thread specific.  Must be called with p_slock
 810  * locked.  If 'preferthread' is set, overwrite certain process-related
 811  * fields that are maintained for both threads and processes.
 812  */
 813 static void
 814 fill_kinfo_thread(struct thread *td, struct kinfo_proc *kp, int preferthread)
 815 {
 816         struct proc *p;
 817
 818         p = td->td_proc;
 819         PROC_SLOCK_ASSERT(p, MA_OWNED);
 820
 821         thread_lock(td);
 822         if (td->td_wmesg != NULL)
 823                 strlcpy(kp->ki_wmesg, td->td_wmesg, sizeof(kp->ki_wmesg));
 824         else
 825                 bzero(kp->ki_wmesg, sizeof(kp->ki_wmesg));
 826         if (td->td_name[0] != '\0')
 827                 strlcpy(kp->ki_ocomm, td->td_name, sizeof(kp->ki_ocomm));
 828         if (TD_ON_LOCK(td)) {
 829                 kp->ki_kiflag |= KI_LOCKBLOCK;
 830                 strlcpy(kp->ki_lockname, td->td_lockname,
 831                     sizeof(kp->ki_lockname));
 832         } else {
 833                 kp->ki_kiflag &= ~KI_LOCKBLOCK;
 834                 bzero(kp->ki_lockname, sizeof(kp->ki_lockname));
 835         }
 836
 837         if (p->p_state == PRS_NORMAL) { /*  XXXKSE very approximate */
 838                 if (TD_ON_RUNQ(td) ||
 839                     TD_CAN_RUN(td) ||
 840                     TD_IS_RUNNING(td)) {
 841                         kp->ki_stat = SRUN;
 842                 } else if (P_SHOULDSTOP(p)) {
 843                         kp->ki_stat = SSTOP;
 844                 } else if (TD_IS_SLEEPING(td)) {
 845                         kp->ki_stat = SSLEEP;
 846                 } else if (TD_ON_LOCK(td)) {
 847                         kp->ki_stat = SLOCK;
 848                 } else {
 849                         kp->ki_stat = SWAIT;
 850                 }
 851         } else if (p->p_state == PRS_ZOMBIE) {
 852                 kp->ki_stat = SZOMB;
 853         } else {
 854                 kp->ki_stat = SIDL;
 855         }
 856
 857         /* Things in the thread */
 858         kp->ki_wchan = td->td_wchan;
 859         kp->ki_pri.pri_level = td->td_priority;
 860         kp->ki_pri.pri_native = td->td_base_pri;
 861         kp->ki_lastcpu = td->td_lastcpu;
 862         kp->ki_oncpu = td->td_oncpu;
 863         kp->ki_tdflags = td->td_flags;
 864         kp->ki_tid = td->td_tid;
 865         kp->ki_numthreads = p->p_numthreads;
 866         kp->ki_pcb = td->td_pcb;
 867         kp->ki_kstack = (void *)td->td_kstack;
 868         kp->ki_pctcpu = sched_pctcpu(td);
 869         kp->ki_estcpu = td->td_estcpu;
 870         kp->ki_slptime = (ticks - td->td_slptick) / hz;
 871         kp->ki_pri.pri_class = td->td_pri_class;
 872         kp->ki_pri.pri_user = td->td_user_pri;
 873
 874         if (preferthread)
 875                 kp->ki_runtime = cputick2usec(td->td_runtime);
 876
 877         /* We can't get this anymore but ps etc never used it anyway. */
 878         kp->ki_rqindex = 0;
 879
 880         SIGSETOR(kp->ki_siglist, td->td_siglist);
 881         kp->ki_sigmask = td->td_sigmask;
 882         thread_unlock(td);
 883 }
 884
 885 /*
 886  * Fill in a kinfo_proc structure for the specified process.
 887  * Must be called with the target process locked.
 888  */
 889 void
 890 fill_kinfo_proc(struct proc *p, struct kinfo_proc *kp)
 891 {
 892
 893         fill_kinfo_proc_only(p, kp);
 894         PROC_SLOCK(p);
 895         if (FIRST_THREAD_IN_PROC(p) != NULL)
 896                 fill_kinfo_thread(FIRST_THREAD_IN_PROC(p), kp, 0);
 897         PROC_SUNLOCK(p);
 898 }
 899
 900 struct pstats *
 901 pstats_alloc(void)
 902 {
 903
 904         return (malloc(sizeof(struct pstats), M_SUBPROC, M_ZERO|M_WAITOK));
 905 }
 906
 907 /*
 908  * Copy parts of p_stats; zero the rest of p_stats (statistics).
 909  */
 910 void
 911 pstats_fork(struct pstats *src, struct pstats *dst)
 912 {
 913
 914         bzero(&dst->pstat_startzero,
 915             __rangeof(struct pstats, pstat_startzero, pstat_endzero));
 916         bcopy(&src->pstat_startcopy, &dst->pstat_startcopy,
 917             __rangeof(struct pstats, pstat_startcopy, pstat_endcopy));
 918 }
 919
 920 void
 921 pstats_free(struct pstats *ps)
 922 {
 923
 924         free(ps, M_SUBPROC);
 925 }
 926
 927 /*
 928  * Locate a zombie process by number
 929  */
 930 struct proc *
 931 zpfind(pid_t pid)
 932 {
 933         struct proc *p;
 934
 935         sx_slock(&allproc_lock);
 936         LIST_FOREACH(p, &zombproc, p_list)
 937                 if (p->p_pid == pid) {
 938                         PROC_LOCK(p);
 939                         break;
 940                 }
 941         sx_sunlock(&allproc_lock);
 942         return (p);
 943 }
 944
 945 #define KERN_PROC_ZOMBMASK      0x3
 946 #define KERN_PROC_NOTHREADS     0x4
 947
 948 /*
 949  * Must be called with the process locked and will return with it unlocked.
 950  */
 951 static int
 952 sysctl_out_proc(struct proc *p, struct sysctl_req *req, int flags)
 953 {
 954         struct thread *td;
 955         struct kinfo_proc kinfo_proc;
 956         int error = 0;
 957         struct proc *np;
 958         pid_t pid = p->p_pid;
 959
 960         PROC_LOCK_ASSERT(p, MA_OWNED);
 961
 962         fill_kinfo_proc_only(p, &kinfo_proc);
 963         if (flags & KERN_PROC_NOTHREADS) {
 964                 PROC_SLOCK(p);
 965                 if (FIRST_THREAD_IN_PROC(p) != NULL)
 966                         fill_kinfo_thread(FIRST_THREAD_IN_PROC(p),
 967                             &kinfo_proc, 0);
 968                 PROC_SUNLOCK(p);
 969                 error = SYSCTL_OUT(req, (caddr_t)&kinfo_proc,
 970                                    sizeof(kinfo_proc));
 971         } else {
 972                 PROC_SLOCK(p);
 973                 if (FIRST_THREAD_IN_PROC(p) != NULL)
 974                         FOREACH_THREAD_IN_PROC(p, td) {
 975                                 fill_kinfo_thread(td, &kinfo_proc, 1);
 976                                 error = SYSCTL_OUT(req, (caddr_t)&kinfo_proc,
 977                                                    sizeof(kinfo_proc));
 978                                 if (error)
 979                                         break;
 980                         }
 981                 else
 982                         error = SYSCTL_OUT(req, (caddr_t)&kinfo_proc,
 983                                            sizeof(kinfo_proc));
 984                 PROC_SUNLOCK(p);
 985         }
 986         PROC_UNLOCK(p);
 987         if (error)
 988                 return (error);
 989         if (flags & KERN_PROC_ZOMBMASK)
 990                 np = zpfind(pid);
 991         else {
 992                 if (pid == 0)
 993                         return (0);
 994                 np = pfind(pid);
 995         }
 996         if (np == NULL)
 997                 return (ESRCH);
 998         if (np != p) {
 999                 PROC_UNLOCK(np);
1000                 return (ESRCH);
1001         }
1002         PROC_UNLOCK(np);
1003         return (0);
1004 }
1005
1006 static int
1007 sysctl_kern_proc(SYSCTL_HANDLER_ARGS)
1008 {
1009         int *name = (int*) arg1;
1010         u_int namelen = arg2;
1011         struct proc *p;
1012         int flags, doingzomb, oid_number;
1013         int error = 0;
1014
1015         oid_number = oidp->oid_number;
1016         if (oid_number != KERN_PROC_ALL &&
1017             (oid_number & KERN_PROC_INC_THREAD) == 0)
1018                 flags = KERN_PROC_NOTHREADS;
1019         else {
1020                 flags = 0;
1021                 oid_number &= ~KERN_PROC_INC_THREAD;
1022         }
1023         if (oid_number == KERN_PROC_PID) {
1024                 if (namelen != 1)
1025                         return (EINVAL);
1026                 error = sysctl_wire_old_buffer(req, 0);
1027                 if (error)
1028                         return (error);
1029                 p = pfind((pid_t)name[0]);
1030                 if (!p)
1031                         return (ESRCH);
1032                 if ((error = p_cansee(curthread, p))) {
1033                         PROC_UNLOCK(p);
1034                         return (error);
1035                 }
1036                 error = sysctl_out_proc(p, req, flags);
1037                 return (error);
1038         }
1039
1040         switch (oid_number) {
1041         case KERN_PROC_ALL:
1042                 if (namelen != 0)
1043                         return (EINVAL);
1044                 break;
1045         case KERN_PROC_PROC:
1046                 if (namelen != 0 && namelen != 1)
1047                         return (EINVAL);
1048                 break;
1049         default:
1050                 if (namelen != 1)
1051                         return (EINVAL);
1052                 break;
1053         }
1054
1055         if (!req->oldptr) {
1056                 /* overestimate by 5 procs */
1057                 error = SYSCTL_OUT(req, 0, sizeof (struct kinfo_proc) * 5);
1058                 if (error)
1059                         return (error);
1060         }
1061         error = sysctl_wire_old_buffer(req, 0);
1062         if (error != 0)
1063                 return (error);
1064         sx_slock(&allproc_lock);
1065         for (doingzomb=0 ; doingzomb < 2 ; doingzomb++) {
1066                 if (!doingzomb)
1067                         p = LIST_FIRST(&allproc);
1068                 else
1069                         p = LIST_FIRST(&zombproc);
1070                 for (; p != 0; p = LIST_NEXT(p, p_list)) {
1071                         /*
1072                          * Skip embryonic processes.
1073                          */
1074                         PROC_SLOCK(p);
1075                         if (p->p_state == PRS_NEW) {
1076                                 PROC_SUNLOCK(p);
1077                                 continue;
1078                         }
1079                         PROC_SUNLOCK(p);
1080                         PROC_LOCK(p);
1081                         KASSERT(p->p_ucred != NULL,
1082                             ("process credential is NULL for non-NEW proc"));
1083                         /*
1084                          * Show a user only appropriate processes.
1085                          */
1086                         if (p_cansee(curthread, p)) {
1087                                 PROC_UNLOCK(p);
1088                                 continue;
1089                         }
1090                         /*
1091                          * TODO - make more efficient (see notes below).
1092                          * do by session.
1093                          */
1094                         switch (oid_number) {
1095
1096                         case KERN_PROC_GID:
1097                                 if (p->p_ucred->cr_gid != (gid_t)name[0]) {
1098                                         PROC_UNLOCK(p);
1099                                         continue;
1100                                 }
1101                                 break;
1102
1103                         case KERN_PROC_PGRP:
1104                                 /* could do this by traversing pgrp */
1105                                 if (p->p_pgrp == NULL ||
1106                                     p->p_pgrp->pg_id != (pid_t)name[0]) {
1107                                         PROC_UNLOCK(p);
1108                                         continue;
1109                                 }
1110                                 break;
1111
1112                         case KERN_PROC_RGID:
1113                                 if (p->p_ucred->cr_rgid != (gid_t)name[0]) {
1114                                         PROC_UNLOCK(p);
1115                                         continue;
1116                                 }
1117                                 break;
1118
1119                         case KERN_PROC_SESSION:
1120                                 if (p->p_session == NULL ||
1121                                     p->p_session->s_sid != (pid_t)name[0]) {
1122                                         PROC_UNLOCK(p);
1123                                         continue;
1124                                 }
1125                                 break;
1126
1127                         case KERN_PROC_TTY:
1128                                 if ((p->p_flag & P_CONTROLT) == 0 ||
1129                                     p->p_session == NULL) {
1130                                         PROC_UNLOCK(p);
1131                                         continue;
1132                                 }
1133                                 SESS_LOCK(p->p_session);
1134                                 if (p->p_session->s_ttyp == NULL ||
1135                                     dev2udev(p->p_session->s_ttyp->t_dev) !=
1136                                     (dev_t)name[0]) {
1137                                         SESS_UNLOCK(p->p_session);
1138                                         PROC_UNLOCK(p);
1139                                         continue;
1140                                 }
1141                                 SESS_UNLOCK(p->p_session);
1142                                 break;
1143
1144                         case KERN_PROC_UID:
1145                                 if (p->p_ucred->cr_uid != (uid_t)name[0]) {
1146                                         PROC_UNLOCK(p);
1147                                         continue;
1148                                 }
1149                                 break;
1150
1151                         case KERN_PROC_RUID:
1152                                 if (p->p_ucred->cr_ruid != (uid_t)name[0]) {
1153                                         PROC_UNLOCK(p);
1154                                         continue;
1155                                 }
1156                                 break;
1157
1158                         case KERN_PROC_PROC:
1159                                 break;
1160
1161                         default:
1162                                 break;
1163
1164                         }
1165
1166                         error = sysctl_out_proc(p, req, flags | doingzomb);
1167                         if (error) {
1168                                 sx_sunlock(&allproc_lock);
1169                                 return (error);
1170                         }
1171                 }
1172         }
1173         sx_sunlock(&allproc_lock);
1174         return (0);
1175 }
1176
1177 struct pargs *
1178 pargs_alloc(int len)
1179 {
1180         struct pargs *pa;
1181
1182         MALLOC(pa, struct pargs *, sizeof(struct pargs) + len, M_PARGS,
1183                 M_WAITOK);
1184         refcount_init(&pa->ar_ref, 1);
1185         pa->ar_length = len;
1186         return (pa);
1187 }
1188
1189 static void
1190 pargs_free(struct pargs *pa)
1191 {
1192
1193         FREE(pa, M_PARGS);
1194 }
1195
1196 void
1197 pargs_hold(struct pargs *pa)
1198 {
1199
1200         if (pa == NULL)
1201                 return;
1202         refcount_acquire(&pa->ar_ref);
1203 }
1204
1205 void
1206 pargs_drop(struct pargs *pa)
1207 {
1208
1209         if (pa == NULL)
1210                 return;
1211         if (refcount_release(&pa->ar_ref))
1212                 pargs_free(pa);
1213 }
1214
1215 /*
1216  * This sysctl allows a process to retrieve the argument list or process
1217  * title for another process without groping around in the address space
1218  * of the other process.  It also allow a process to set its own "process
1219  * title to a string of its own choice.
1220  */
1221 static int
1222 sysctl_kern_proc_args(SYSCTL_HANDLER_ARGS)
1223 {
1224         int *name = (int*) arg1;
1225         u_int namelen = arg2;
1226         struct pargs *newpa, *pa;
1227         struct proc *p;
1228         int error = 0;
1229
1230         if (namelen != 1)
1231                 return (EINVAL);
1232
1233         p = pfind((pid_t)name[0]);
1234         if (!p)
1235                 return (ESRCH);
1236
1237         if ((error = p_cansee(curthread, p)) != 0) {
1238                 PROC_UNLOCK(p);
1239                 return (error);
1240         }
1241
1242         if (req->newptr && curproc != p) {
1243                 PROC_UNLOCK(p);
1244                 return (EPERM);
1245         }
1246
1247         pa = p->p_args;
1248         pargs_hold(pa);
1249         PROC_UNLOCK(p);
1250         if (req->oldptr != NULL && pa != NULL)
1251                 error = SYSCTL_OUT(req, pa->ar_args, pa->ar_length);
1252         pargs_drop(pa);
1253         if (error != 0 || req->newptr == NULL)
1254                 return (error);
1255
1256         if (req->newlen + sizeof(struct pargs) > ps_arg_cache_limit)
1257                 return (ENOMEM);
1258         newpa = pargs_alloc(req->newlen);
1259         error = SYSCTL_IN(req, newpa->ar_args, req->newlen);
1260         if (error != 0) {
1261                 pargs_free(newpa);
1262                 return (error);
1263         }
1264         PROC_LOCK(p);
1265         pa = p->p_args;
1266         p->p_args = newpa;
1267         PROC_UNLOCK(p);
1268         pargs_drop(pa);
1269         return (0);
1270 }
1271
1272 /*
1273  * This sysctl allows a process to retrieve the path of the executable for
1274  * itself or another process.
1275  */
1276 static int
1277 sysctl_kern_proc_pathname(SYSCTL_HANDLER_ARGS)
1278 {
1279         pid_t *pidp = (pid_t *)arg1;
1280         unsigned int arglen = arg2;
1281         struct proc *p;
1282         struct vnode *vp;
1283         char *retbuf, *freebuf;
1284         int error, vfslocked;
1285
1286         if (arglen != 1)
1287                 return (EINVAL);
1288         if (*pidp == -1) {      /* -1 means this process */
1289                 p = req->td->td_proc;
1290         } else {
1291                 p = pfind(*pidp);
1292                 if (p == NULL)
1293                         return (ESRCH);
1294                 if ((error = p_cansee(curthread, p)) != 0) {
1295                         PROC_UNLOCK(p);
1296                         return (error);
1297                 }
1298         }
1299
1300         vp = p->p_textvp;
1301         if (vp == NULL) {
1302                 if (*pidp != -1)
1303                         PROC_UNLOCK(p);
1304                 return (0);
1305         }
1306         vref(vp);
1307         if (*pidp != -1)
1308                 PROC_UNLOCK(p);
1309         error = vn_fullpath(req->td, vp, &retbuf, &freebuf);
1310         vfslocked = VFS_LOCK_GIANT(vp->v_mount);
1311         vrele(vp);
1312         VFS_UNLOCK_GIANT(vfslocked);
1313         if (error)
1314                 return (error);
1315         error = SYSCTL_OUT(req, retbuf, strlen(retbuf) + 1);
1316         free(freebuf, M_TEMP);
1317         return (error);
1318 }
1319
1320 static int
1321 sysctl_kern_proc_sv_name(SYSCTL_HANDLER_ARGS)
1322 {
1323         struct proc *p;
1324         char *sv_name;
1325         int *name;
1326         int namelen;
1327         int error;
1328
1329         namelen = arg2;
1330         if (namelen != 1)
1331                 return (EINVAL);
1332
1333         name = (int *)arg1;
1334         if ((p = pfind((pid_t)name[0])) == NULL)
1335                 return (ESRCH);
1336         if ((error = p_cansee(curthread, p))) {
1337                 PROC_UNLOCK(p);
1338                 return (error);
1339         }
1340         sv_name = p->p_sysent->sv_name;
1341         PROC_UNLOCK(p);
1342         return (sysctl_handle_string(oidp, sv_name, 0, req));
1343 }
1344
1345 #ifdef KINFO_OVMENTRY_SIZE
1346 CTASSERT(sizeof(struct kinfo_ovmentry) == KINFO_OVMENTRY_SIZE);
1347 #endif
1348
1349 /* Compatability with early 7-stable */
1350 static int
1351 sysctl_kern_proc_ovmmap(SYSCTL_HANDLER_ARGS)
1352 {
1353         vm_map_entry_t entry, tmp_entry;
1354         unsigned int last_timestamp;
1355         char *fullpath, *freepath;
1356         struct kinfo_ovmentry *kve;
1357         struct vattr va;
1358         struct ucred *cred;
1359         int error, *name;
1360         struct vnode *vp;
1361         struct proc *p;
1362         vm_map_t map;
1363         struct vmspace *vm;
1364
1365         name = (int *)arg1;
1366         if ((p = pfind((pid_t)name[0])) == NULL)
1367                 return (ESRCH);
1368         if (p->p_flag & P_WEXIT) {
1369                 PROC_UNLOCK(p);
1370                 return (ESRCH);
1371         }
1372         if ((error = p_candebug(curthread, p))) {
1373                 PROC_UNLOCK(p);
1374                 return (error);
1375         }
1376         _PHOLD(p);
1377         PROC_UNLOCK(p);
1378         vm = vmspace_acquire_ref(p);
1379         if (vm == NULL) {
1380                 PRELE(p);
1381                 return (ESRCH);
1382         }
1383         kve = malloc(sizeof(*kve), M_TEMP, M_WAITOK);
1384
1385         map = &p->p_vmspace->vm_map;    /* XXXRW: More locking required? */
1386         vm_map_lock_read(map);
1387         for (entry = map->header.next; entry != &map->header;
1388             entry = entry->next) {
1389                 vm_object_t obj, tobj, lobj;
1390                 vm_offset_t addr;
1391                 int vfslocked;
1392
1393                 if (entry->eflags & MAP_ENTRY_IS_SUB_MAP)
1394                         continue;
1395
1396                 bzero(kve, sizeof(*kve));
1397                 kve->kve_structsize = sizeof(*kve);
1398
1399                 kve->kve_private_resident = 0;
1400                 obj = entry->object.vm_object;
1401                 if (obj != NULL) {
1402                         VM_OBJECT_LOCK(obj);
1403                         if (obj->shadow_count == 1)
1404                                 kve->kve_private_resident =
1405                                     obj->resident_page_count;
1406                 }
1407                 kve->kve_resident = 0;
1408                 addr = entry->start;
1409                 while (addr < entry->end) {
1410                         if (pmap_extract(map->pmap, addr))
1411                                 kve->kve_resident++;
1412                         addr += PAGE_SIZE;
1413                 }
1414
1415                 for (lobj = tobj = obj; tobj; tobj = tobj->backing_object) {
1416                         if (tobj != obj)
1417                                 VM_OBJECT_LOCK(tobj);
1418                         if (lobj != obj)
1419                                 VM_OBJECT_UNLOCK(lobj);
1420                         lobj = tobj;
1421                 }
1422
1423                 kve->kve_start = (void*)entry->start;
1424                 kve->kve_end = (void*)entry->end;
1425                 kve->kve_offset = (off_t)entry->offset;
1426
1427                 if (entry->protection & VM_PROT_READ)
1428                         kve->kve_protection |= KVME_PROT_READ;
1429                 if (entry->protection & VM_PROT_WRITE)
1430                         kve->kve_protection |= KVME_PROT_WRITE;
1431                 if (entry->protection & VM_PROT_EXECUTE)
1432                         kve->kve_protection |= KVME_PROT_EXEC;
1433
1434                 if (entry->eflags & MAP_ENTRY_COW)
1435                         kve->kve_flags |= KVME_FLAG_COW;
1436                 if (entry->eflags & MAP_ENTRY_NEEDS_COPY)
1437                         kve->kve_flags |= KVME_FLAG_NEEDS_COPY;
1438
1439                 last_timestamp = map->timestamp;
1440                 vm_map_unlock_read(map);
1441
1442                 kve->kve_fileid = 0;
1443                 kve->kve_fsid = 0;
1444                 freepath = NULL;
1445                 fullpath = "";
1446                 if (lobj) {
1447                         vp = NULL;
1448                         switch (lobj->type) {
1449                         case OBJT_DEFAULT:
1450                                 kve->kve_type = KVME_TYPE_DEFAULT;
1451                                 break;
1452                         case OBJT_VNODE:
1453                                 kve->kve_type = KVME_TYPE_VNODE;
1454                                 vp = lobj->handle;
1455                                 vref(vp);
1456                                 break;
1457                         case OBJT_SWAP:
1458                                 kve->kve_type = KVME_TYPE_SWAP;
1459                                 break;
1460                         case OBJT_DEVICE:
1461                                 kve->kve_type = KVME_TYPE_DEVICE;
1462                                 break;
1463                         case OBJT_PHYS:
1464                                 kve->kve_type = KVME_TYPE_PHYS;
1465                                 break;
1466                         case OBJT_DEAD:
1467                                 kve->kve_type = KVME_TYPE_DEAD;
1468                                 break;
1469                         default:
1470                                 kve->kve_type = KVME_TYPE_UNKNOWN;
1471                                 break;
1472                         }
1473                         if (lobj != obj)
1474                                 VM_OBJECT_UNLOCK(lobj);
1475
1476                         kve->kve_ref_count = obj->ref_count;
1477                         kve->kve_shadow_count = obj->shadow_count;
1478                         VM_OBJECT_UNLOCK(obj);
1479                         if (vp != NULL) {
1480                                 vn_fullpath(curthread, vp, &fullpath,
1481                                     &freepath);
1482                                 cred = curthread->td_ucred;
1483                                 vfslocked = VFS_LOCK_GIANT(vp->v_mount);
1484                                 vn_lock(vp, LK_SHARED | LK_RETRY, curthread);
1485                                 if (VOP_GETATTR(vp, &va, cred, curthread) == 0) {
1486                                         kve->kve_fileid = va.va_fileid;
1487                                         kve->kve_fsid = va.va_fsid;
1488                                 }
1489                                 vput(vp);
1490                                 VFS_UNLOCK_GIANT(vfslocked);
1491                         }
1492                 } else {
1493                         kve->kve_type = KVME_TYPE_NONE;
1494                         kve->kve_ref_count = 0;
1495                         kve->kve_shadow_count = 0;
1496                 }
1497
1498                 strlcpy(kve->kve_path, fullpath, sizeof(kve->kve_path));
1499                 if (freepath != NULL)
1500                         free(freepath, M_TEMP);
1501
1502                 error = SYSCTL_OUT(req, kve, sizeof(*kve));
1503                 vm_map_lock_read(map);
1504                 if (error)
1505                         break;
1506                 if (last_timestamp != map->timestamp) {
1507                         vm_map_lookup_entry(map, addr - 1, &tmp_entry);
1508                         entry = tmp_entry;
1509                 }
1510         }
1511         vm_map_unlock_read(map);
1512         vmspace_free(vm);
1513         PRELE(p);
1514         free(kve, M_TEMP);
1515         return (error);
1516 }
1517
1518 #ifdef KINFO_VMENTRY_SIZE
1519 CTASSERT(sizeof(struct kinfo_vmentry) == KINFO_VMENTRY_SIZE);
1520 #endif
1521
1522 static int
1523 sysctl_kern_proc_vmmap(SYSCTL_HANDLER_ARGS)
1524 {
1525         vm_map_entry_t entry, tmp_entry;
1526         unsigned int last_timestamp;
1527         char *fullpath, *freepath;
1528         struct kinfo_vmentry *kve;
1529         struct vattr va;
1530         struct ucred *cred;
1531         int error, *name;
1532         struct vnode *vp;
1533         struct proc *p;
1534         struct vmspace *vm;
1535         vm_map_t map;
1536
1537         name = (int *)arg1;
1538         if ((p = pfind((pid_t)name[0])) == NULL)
1539                 return (ESRCH);
1540         if (p->p_flag & P_WEXIT) {
1541                 PROC_UNLOCK(p);
1542                 return (ESRCH);
1543         }
1544         if ((error = p_candebug(curthread, p))) {
1545                 PROC_UNLOCK(p);
1546                 return (error);
1547         }
1548         _PHOLD(p);
1549         PROC_UNLOCK(p);
1550         vm = vmspace_acquire_ref(p);
1551         if (vm == NULL) {
1552                 PRELE(p);
1553                 return (ESRCH);
1554         }
1555         kve = malloc(sizeof(*kve), M_TEMP, M_WAITOK);
1556
1557         map = &vm->vm_map;      /* XXXRW: More locking required? */
1558         vm_map_lock_read(map);
1559         for (entry = map->header.next; entry != &map->header;
1560             entry = entry->next) {
1561                 vm_object_t obj, tobj, lobj;
1562                 vm_offset_t addr;
1563                 int vfslocked;
1564
1565                 if (entry->eflags & MAP_ENTRY_IS_SUB_MAP)
1566                         continue;
1567
1568                 bzero(kve, sizeof(*kve));
1569
1570                 kve->kve_private_resident = 0;
1571                 obj = entry->object.vm_object;
1572                 if (obj != NULL) {
1573                         VM_OBJECT_LOCK(obj);
1574                         if (obj->shadow_count == 1)
1575                                 kve->kve_private_resident =
1576                                     obj->resident_page_count;
1577                 }
1578                 kve->kve_resident = 0;
1579                 addr = entry->start;
1580                 while (addr < entry->end) {
1581                         if (pmap_extract(map->pmap, addr))
1582                                 kve->kve_resident++;
1583                         addr += PAGE_SIZE;
1584                 }
1585
1586                 for (lobj = tobj = obj; tobj; tobj = tobj->backing_object) {
1587                         if (tobj != obj)
1588                                 VM_OBJECT_LOCK(tobj);
1589                         if (lobj != obj)
1590                                 VM_OBJECT_UNLOCK(lobj);
1591                         lobj = tobj;
1592                 }
1593
1594                 kve->kve_start = entry->start;
1595                 kve->kve_end = entry->end;
1596                 kve->kve_offset = entry->offset;
1597
1598                 if (entry->protection & VM_PROT_READ)
1599                         kve->kve_protection |= KVME_PROT_READ;
1600                 if (entry->protection & VM_PROT_WRITE)
1601                         kve->kve_protection |= KVME_PROT_WRITE;
1602                 if (entry->protection & VM_PROT_EXECUTE)
1603                         kve->kve_protection |= KVME_PROT_EXEC;
1604
1605                 if (entry->eflags & MAP_ENTRY_COW)
1606                         kve->kve_flags |= KVME_FLAG_COW;
1607                 if (entry->eflags & MAP_ENTRY_NEEDS_COPY)
1608                         kve->kve_flags |= KVME_FLAG_NEEDS_COPY;
1609
1610                 last_timestamp = map->timestamp;
1611                 vm_map_unlock_read(map);
1612
1613                 kve->kve_fileid = 0;
1614                 kve->kve_fsid = 0;
1615                 freepath = NULL;
1616                 fullpath = "";
1617                 if (lobj) {
1618                         vp = NULL;
1619                         switch (lobj->type) {
1620                         case OBJT_DEFAULT:
1621                                 kve->kve_type = KVME_TYPE_DEFAULT;
1622                                 break;
1623                         case OBJT_VNODE:
1624                                 kve->kve_type = KVME_TYPE_VNODE;
1625                                 vp = lobj->handle;
1626                                 vref(vp);
1627                                 break;
1628                         case OBJT_SWAP:
1629                                 kve->kve_type = KVME_TYPE_SWAP;
1630                                 break;
1631                         case OBJT_DEVICE:
1632                                 kve->kve_type = KVME_TYPE_DEVICE;
1633                                 break;
1634                         case OBJT_PHYS:
1635                                 kve->kve_type = KVME_TYPE_PHYS;
1636                                 break;
1637                         case OBJT_DEAD:
1638                                 kve->kve_type = KVME_TYPE_DEAD;
1639                                 break;
1640                         default:
1641                                 kve->kve_type = KVME_TYPE_UNKNOWN;
1642                                 break;
1643                         }
1644                         if (lobj != obj)
1645                                 VM_OBJECT_UNLOCK(lobj);
1646
1647                         kve->kve_ref_count = obj->ref_count;
1648                         kve->kve_shadow_count = obj->shadow_count;
1649                         VM_OBJECT_UNLOCK(obj);
1650                         if (vp != NULL) {
1651                                 vn_fullpath(curthread, vp, &fullpath,
1652                                     &freepath);
1653                                 cred = curthread->td_ucred;
1654                                 vfslocked = VFS_LOCK_GIANT(vp->v_mount);
1655                                 vn_lock(vp, LK_SHARED | LK_RETRY, curthread);
1656                                 if (VOP_GETATTR(vp, &va, cred, curthread) == 0) {
1657                                         kve->kve_fileid = va.va_fileid;
1658                                         kve->kve_fsid = va.va_fsid;
1659                                 }
1660                                 vput(vp);
1661                                 VFS_UNLOCK_GIANT(vfslocked);
1662                         }
1663                 } else {
1664                         kve->kve_type = KVME_TYPE_NONE;
1665                         kve->kve_ref_count = 0;
1666                         kve->kve_shadow_count = 0;
1667                 }
1668
1669                 strlcpy(kve->kve_path, fullpath, sizeof(kve->kve_path));
1670                 if (freepath != NULL)
1671                         free(freepath, M_TEMP);
1672
1673                 /* Pack record size down */
1674                 kve->kve_structsize = offsetof(struct kinfo_vmentry, kve_path) +
1675                     strlen(kve->kve_path) + 1;
1676                 kve->kve_structsize = roundup(kve->kve_structsize,
1677                     sizeof(uint64_t));
1678                 error = SYSCTL_OUT(req, kve, kve->kve_structsize);
1679                 vm_map_lock_read(map);
1680                 if (error)
1681                         break;
1682                 if (last_timestamp != map->timestamp) {
1683                         vm_map_lookup_entry(map, addr - 1, &tmp_entry);
1684                         entry = tmp_entry;
1685                 }
1686         }
1687         vm_map_unlock_read(map);
1688         vmspace_free(vm);
1689         PRELE(p);
1690         free(kve, M_TEMP);
1691         return (error);
1692 }
1693
1694 #if defined(STACK) || defined(DDB)
1695 static int
1696 sysctl_kern_proc_kstack(SYSCTL_HANDLER_ARGS)
1697 {
1698         struct kinfo_kstack *kkstp;
1699         int error, i, *name, numthreads;
1700         lwpid_t *lwpidarray;
1701         struct thread *td;
1702         struct stack *st;
1703         struct sbuf sb;
1704         struct proc *p;
1705
1706         name = (int *)arg1;
1707         if ((p = pfind((pid_t)name[0])) == NULL)
1708                 return (ESRCH);
1709         /* XXXRW: Not clear ESRCH is the right error during proc execve(). */
1710         if (p->p_flag & P_WEXIT || p->p_flag & P_INEXEC) {
1711                 PROC_UNLOCK(p);
1712                 return (ESRCH);
1713         }
1714         if ((error = p_candebug(curthread, p))) {
1715                 PROC_UNLOCK(p);
1716                 return (error);
1717         }
1718         _PHOLD(p);
1719         PROC_UNLOCK(p);
1720
1721         kkstp = malloc(sizeof(*kkstp), M_TEMP, M_WAITOK);
1722         st = stack_create();
1723
1724         lwpidarray = NULL;
1725         numthreads = 0;
1726         PROC_SLOCK(p);
1727 repeat:
1728         if (numthreads < p->p_numthreads) {
1729                 if (lwpidarray != NULL) {
1730                         free(lwpidarray, M_TEMP);
1731                         lwpidarray = NULL;
1732                 }
1733                 numthreads = p->p_numthreads;
1734                 PROC_SUNLOCK(p);
1735                 lwpidarray = malloc(sizeof(*lwpidarray) * numthreads, M_TEMP,
1736                     M_WAITOK | M_ZERO);
1737                 PROC_SLOCK(p);
1738                 goto repeat;
1739         }
1740         PROC_SUNLOCK(p);
1741         i = 0;
1742
1743         /*
1744          * XXXRW: During the below loop, execve(2) and countless other sorts
1745          * of changes could have taken place.  Should we check to see if the
1746          * vmspace has been replaced, or the like, in order to prevent
1747          * giving a snapshot that spans, say, execve(2), with some threads
1748          * before and some after?  Among other things, the credentials could
1749          * have changed, in which case the right to extract debug info might
1750          * no longer be assured.
1751          */
1752         PROC_LOCK(p);
1753         FOREACH_THREAD_IN_PROC(p, td) {
1754                 KASSERT(i < numthreads,
1755                     ("sysctl_kern_proc_kstack: numthreads"));
1756                 lwpidarray[i] = td->td_tid;
1757                 i++;
1758         }
1759         numthreads = i;
1760         for (i = 0; i < numthreads; i++) {
1761                 td = thread_find(p, lwpidarray[i]);
1762                 if (td == NULL) {
1763                         continue;
1764                 }
1765                 bzero(kkstp, sizeof(*kkstp));
1766                 (void)sbuf_new(&sb, kkstp->kkst_trace,
1767                     sizeof(kkstp->kkst_trace), SBUF_FIXEDLEN);
1768                 thread_lock(td);
1769                 kkstp->kkst_tid = td->td_tid;
1770                 if (TD_IS_SWAPPED(td))
1771                         kkstp->kkst_state = KKST_STATE_SWAPPED;
1772                 else if (TD_IS_RUNNING(td))
1773                         kkstp->kkst_state = KKST_STATE_RUNNING;
1774                 else {
1775                         kkstp->kkst_state = KKST_STATE_STACKOK;
1776                         stack_save_td(st, td);
1777                 }
1778                 thread_unlock(td);
1779                 PROC_UNLOCK(p);
1780                 stack_sbuf_print(&sb, st);
1781                 sbuf_finish(&sb);
1782                 sbuf_delete(&sb);
1783                 error = SYSCTL_OUT(req, kkstp, sizeof(*kkstp));
1784                 PROC_LOCK(p);
1785                 if (error)
1786                         break;
1787         }
1788         _PRELE(p);
1789         PROC_UNLOCK(p);
1790         if (lwpidarray != NULL)
1791                 free(lwpidarray, M_TEMP);
1792         stack_destroy(st);
1793         free(kkstp, M_TEMP);
1794         return (error);
1795 }
1796 #endif
1797
1798 SYSCTL_NODE(_kern, KERN_PROC, proc, CTLFLAG_RD,  0, "Process table");
1799
1800 SYSCTL_PROC(_kern_proc, KERN_PROC_ALL, all, CTLFLAG_RD|CTLTYPE_STRUCT|
1801         CTLFLAG_MPSAFE, 0, 0, sysctl_kern_proc, "S,proc",
1802         "Return entire process table");
1803
1804 static SYSCTL_NODE(_kern_proc, KERN_PROC_GID, gid, CTLFLAG_RD | CTLFLAG_MPSAFE,
1805         sysctl_kern_proc, "Process table");
1806
1807 static SYSCTL_NODE(_kern_proc, KERN_PROC_PGRP, pgrp, CTLFLAG_RD | CTLFLAG_MPSAFE,
1808         sysctl_kern_proc, "Process table");
1809
1810 static SYSCTL_NODE(_kern_proc, KERN_PROC_RGID, rgid, CTLFLAG_RD | CTLFLAG_MPSAFE,
1811         sysctl_kern_proc, "Process table");
1812
1813 static SYSCTL_NODE(_kern_proc, KERN_PROC_SESSION, sid, CTLFLAG_RD |
1814         CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
1815
1816 static SYSCTL_NODE(_kern_proc, KERN_PROC_TTY, tty, CTLFLAG_RD | CTLFLAG_MPSAFE,
1817         sysctl_kern_proc, "Process table");
1818
1819 static SYSCTL_NODE(_kern_proc, KERN_PROC_UID, uid, CTLFLAG_RD | CTLFLAG_MPSAFE,
1820         sysctl_kern_proc, "Process table");
1821
1822 static SYSCTL_NODE(_kern_proc, KERN_PROC_RUID, ruid, CTLFLAG_RD | CTLFLAG_MPSAFE,
1823         sysctl_kern_proc, "Process table");
1824
1825 static SYSCTL_NODE(_kern_proc, KERN_PROC_PID, pid, CTLFLAG_RD | CTLFLAG_MPSAFE,
1826         sysctl_kern_proc, "Process table");
1827
1828 static SYSCTL_NODE(_kern_proc, KERN_PROC_PROC, proc, CTLFLAG_RD | CTLFLAG_MPSAFE,
1829         sysctl_kern_proc, "Return process table, no threads");
1830
1831 static SYSCTL_NODE(_kern_proc, KERN_PROC_ARGS, args,
1832         CTLFLAG_RW | CTLFLAG_ANYBODY | CTLFLAG_MPSAFE,
1833         sysctl_kern_proc_args, "Process argument list");
1834
1835 static SYSCTL_NODE(_kern_proc, KERN_PROC_PATHNAME, pathname, CTLFLAG_RD |
1836         CTLFLAG_MPSAFE, sysctl_kern_proc_pathname, "Process executable path");
1837
1838 static SYSCTL_NODE(_kern_proc, KERN_PROC_SV_NAME, sv_name, CTLFLAG_RD |
1839         CTLFLAG_MPSAFE, sysctl_kern_proc_sv_name,
1840         "Process syscall vector name (ABI type)");
1841
1842 static SYSCTL_NODE(_kern_proc, (KERN_PROC_GID | KERN_PROC_INC_THREAD), gid_td,
1843         CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
1844
1845 static SYSCTL_NODE(_kern_proc, (KERN_PROC_PGRP | KERN_PROC_INC_THREAD), pgrp_td,
1846         CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
1847
1848 static SYSCTL_NODE(_kern_proc, (KERN_PROC_RGID | KERN_PROC_INC_THREAD), rgid_td,
1849         CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
1850
1851 static SYSCTL_NODE(_kern_proc, (KERN_PROC_SESSION | KERN_PROC_INC_THREAD),
1852         sid_td, CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
1853
1854 static SYSCTL_NODE(_kern_proc, (KERN_PROC_TTY | KERN_PROC_INC_THREAD), tty_td,
1855         CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
1856
1857 static SYSCTL_NODE(_kern_proc, (KERN_PROC_UID | KERN_PROC_INC_THREAD), uid_td,
1858         CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
1859
1860 static SYSCTL_NODE(_kern_proc, (KERN_PROC_RUID | KERN_PROC_INC_THREAD), ruid_td,
1861         CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
1862
1863 static SYSCTL_NODE(_kern_proc, (KERN_PROC_PID | KERN_PROC_INC_THREAD), pid_td,
1864         CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
1865
1866 static SYSCTL_NODE(_kern_proc, (KERN_PROC_PROC | KERN_PROC_INC_THREAD), proc_td,
1867         CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc,
1868         "Return process table, no threads");
1869
1870 static SYSCTL_NODE(_kern_proc, KERN_PROC_OVMMAP, ovmmap, CTLFLAG_RD |
1871         CTLFLAG_MPSAFE, sysctl_kern_proc_ovmmap, "Old Process vm map entries");
1872
1873 static SYSCTL_NODE(_kern_proc, KERN_PROC_VMMAP, vmmap, CTLFLAG_RD |
1874         CTLFLAG_MPSAFE, sysctl_kern_proc_vmmap, "Process vm map entries");
1875
1876 #if defined(STACK) || defined(DDB)
1877 static SYSCTL_NODE(_kern_proc, KERN_PROC_KSTACK, kstack, CTLFLAG_RD |
1878         CTLFLAG_MPSAFE, sysctl_kern_proc_kstack, "Process kernel stacks");
1879 #endif