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 * $FreeBSD$ 31 */ 32 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 #include "opt_ktrace.h" 37 #include "opt_kstack_pages.h" 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/kernel.h> 42 #include <sys/lock.h> 43 #include <sys/malloc.h> 44 #include <sys/mutex.h> 45 #include <sys/proc.h> 46 #include <sys/sysent.h> 47 #include <sys/sched.h> 48 #include <sys/smp.h> 49 #include <sys/sysctl.h> 50 #include <sys/filedesc.h> 51 #include <sys/tty.h> 52 #include <sys/signalvar.h> 53 #include <sys/sx.h> 54 #include <sys/user.h> 55 #include <sys/jail.h> 56 #ifdef KTRACE 57 #include <sys/uio.h> 58 #include <sys/ktrace.h> 59 #endif 60 61 #include <vm/vm.h> 62 #include <vm/vm_extern.h> 63 #include <vm/pmap.h> 64 #include <vm/vm_map.h> 65 #include <vm/uma.h> 66 #include <machine/critical.h> 67 68 MALLOC_DEFINE(M_PGRP, "pgrp", "process group header"); 69 MALLOC_DEFINE(M_SESSION, "session", "session header"); 70 static MALLOC_DEFINE(M_PROC, "proc", "Proc structures"); 71 MALLOC_DEFINE(M_SUBPROC, "subproc", "Proc sub-structures"); 72 73 static void doenterpgrp(struct proc *, struct pgrp *); 74 static void orphanpg(struct pgrp *pg); 75 static void pgadjustjobc(struct pgrp *pgrp, int entering); 76 static void pgdelete(struct pgrp *); 77 static int proc_ctor(void *mem, int size, void *arg, int flags); 78 static void proc_dtor(void *mem, int size, void *arg); 79 static int proc_init(void *mem, int size, int flags); 80 static void proc_fini(void *mem, int size); 81 82 /* 83 * Other process lists 84 */ 85 struct pidhashhead *pidhashtbl; 86 u_long pidhash; 87 struct pgrphashhead *pgrphashtbl; 88 u_long pgrphash; 89 struct proclist allproc; 90 struct proclist zombproc; 91 struct sx allproc_lock; 92 struct sx proctree_lock; 93 struct mtx pargs_ref_lock; 94 struct mtx ppeers_lock; 95 uma_zone_t proc_zone; 96 uma_zone_t ithread_zone; 97 98 int kstack_pages = KSTACK_PAGES; 99 int uarea_pages = UAREA_PAGES; 100 SYSCTL_INT(_kern, OID_AUTO, kstack_pages, CTLFLAG_RD, &kstack_pages, 0, ""); 101 SYSCTL_INT(_kern, OID_AUTO, uarea_pages, CTLFLAG_RD, &uarea_pages, 0, ""); 102 103 CTASSERT(sizeof(struct kinfo_proc) == KINFO_PROC_SIZE); 104 105 /* 106 * Initialize global process hashing structures. 107 */ 108 void 109 procinit() 110 { 111 112 sx_init(&allproc_lock, "allproc"); 113 sx_init(&proctree_lock, "proctree"); 114 mtx_init(&pargs_ref_lock, "struct pargs.ref", NULL, MTX_DEF); 115 mtx_init(&ppeers_lock, "p_peers", NULL, MTX_DEF); 116 LIST_INIT(&allproc); 117 LIST_INIT(&zombproc); 118 pidhashtbl = hashinit(maxproc / 4, M_PROC, &pidhash); 119 pgrphashtbl = hashinit(maxproc / 4, M_PROC, &pgrphash); 120 proc_zone = uma_zcreate("PROC", sched_sizeof_proc(), 121 proc_ctor, proc_dtor, proc_init, proc_fini, 122 UMA_ALIGN_PTR, UMA_ZONE_NOFREE); 123 uihashinit(); 124 } 125 126 /* 127 * Prepare a proc for use. 128 */ 129 static int 130 proc_ctor(void *mem, int size, void *arg, int flags) 131 { 132 struct proc *p; 133 134 p = (struct proc *)mem; 135 return (0); 136 } 137 138 /* 139 * Reclaim a proc after use. 140 */ 141 static void 142 proc_dtor(void *mem, int size, void *arg) 143 { 144 struct proc *p; 145 struct thread *td; 146 #ifdef INVARIANTS 147 struct ksegrp *kg; 148 #endif 149 150 /* INVARIANTS checks go here */ 151 p = (struct proc *)mem; 152 td = FIRST_THREAD_IN_PROC(p); 153 #ifdef INVARIANTS 154 KASSERT((p->p_numthreads == 1), 155 ("bad number of threads in exiting process")); 156 KASSERT((p->p_numksegrps == 1), ("free proc with > 1 ksegrp")); 157 KASSERT((td != NULL), ("proc_dtor: bad thread pointer")); 158 kg = FIRST_KSEGRP_IN_PROC(p); 159 KASSERT((kg != NULL), ("proc_dtor: bad kg pointer")); 160 #endif 161 162 /* Dispose of an alternate kstack, if it exists. 163 * XXX What if there are more than one thread in the proc? 164 * The first thread in the proc is special and not 165 * freed, so you gotta do this here. 166 */ 167 if (((p->p_flag & P_KTHREAD) != 0) && (td->td_altkstack != 0)) 168 vm_thread_dispose_altkstack(td); 169 } 170 171 /* 172 * Initialize type-stable parts of a proc (when newly created). 173 */ 174 static int 175 proc_init(void *mem, int size, int flags) 176 { 177 struct proc *p; 178 struct thread *td; 179 struct ksegrp *kg; 180 181 p = (struct proc *)mem; 182 p->p_sched = (struct p_sched *)&p[1]; 183 vm_proc_new(p); 184 td = thread_alloc(); 185 kg = ksegrp_alloc(); 186 bzero(&p->p_mtx, sizeof(struct mtx)); 187 mtx_init(&p->p_mtx, "process lock", NULL, MTX_DEF | MTX_DUPOK); 188 proc_linkup(p, kg, td); 189 sched_newproc(p, kg, td); 190 return (0); 191 } 192 193 /* 194 * UMA should ensure that this function is never called. 195 * Freeing a proc structure would violate type stability. 196 */ 197 static void 198 proc_fini(void *mem, int size) 199 { 200 201 panic("proc reclaimed"); 202 } 203 204 /* 205 * Is p an inferior of the current process? 206 */ 207 int 208 inferior(p) 209 register struct proc *p; 210 { 211 212 sx_assert(&proctree_lock, SX_LOCKED); 213 for (; p != curproc; p = p->p_pptr) 214 if (p->p_pid == 0) 215 return (0); 216 return (1); 217 } 218 219 /* 220 * Locate a process by number; return only "live" processes -- i.e., neither 221 * zombies nor newly born but incompletely initialized processes. By not 222 * returning processes in the PRS_NEW state, we allow callers to avoid 223 * testing for that condition to avoid dereferencing p_ucred, et al. 224 */ 225 struct proc * 226 pfind(pid) 227 register pid_t pid; 228 { 229 register struct proc *p; 230 231 sx_slock(&allproc_lock); 232 LIST_FOREACH(p, PIDHASH(pid), p_hash) 233 if (p->p_pid == pid) { 234 if (p->p_state == PRS_NEW) { 235 p = NULL; 236 break; 237 } 238 PROC_LOCK(p); 239 break; 240 } 241 sx_sunlock(&allproc_lock); 242 return (p); 243 } 244 245 /* 246 * Locate a process group by number. 247 * The caller must hold proctree_lock. 248 */ 249 struct pgrp * 250 pgfind(pgid) 251 register pid_t pgid; 252 { 253 register struct pgrp *pgrp; 254 255 sx_assert(&proctree_lock, SX_LOCKED); 256 257 LIST_FOREACH(pgrp, PGRPHASH(pgid), pg_hash) { 258 if (pgrp->pg_id == pgid) { 259 PGRP_LOCK(pgrp); 260 return (pgrp); 261 } 262 } 263 return (NULL); 264 } 265 266 /* 267 * Create a new process group. 268 * pgid must be equal to the pid of p. 269 * Begin a new session if required. 270 */ 271 int 272 enterpgrp(p, pgid, pgrp, sess) 273 register struct proc *p; 274 pid_t pgid; 275 struct pgrp *pgrp; 276 struct session *sess; 277 { 278 struct pgrp *pgrp2; 279 280 sx_assert(&proctree_lock, SX_XLOCKED); 281 282 KASSERT(pgrp != NULL, ("enterpgrp: pgrp == NULL")); 283 KASSERT(p->p_pid == pgid, 284 ("enterpgrp: new pgrp and pid != pgid")); 285 286 pgrp2 = pgfind(pgid); 287 288 KASSERT(pgrp2 == NULL, 289 ("enterpgrp: pgrp with pgid exists")); 290 KASSERT(!SESS_LEADER(p), 291 ("enterpgrp: session leader attempted setpgrp")); 292 293 mtx_init(&pgrp->pg_mtx, "process group", NULL, MTX_DEF | MTX_DUPOK); 294 295 if (sess != NULL) { 296 /* 297 * new session 298 */ 299 mtx_init(&sess->s_mtx, "session", NULL, MTX_DEF); 300 PROC_LOCK(p); 301 p->p_flag &= ~P_CONTROLT; 302 PROC_UNLOCK(p); 303 PGRP_LOCK(pgrp); 304 sess->s_leader = p; 305 sess->s_sid = p->p_pid; 306 sess->s_count = 1; 307 sess->s_ttyvp = NULL; 308 sess->s_ttyp = NULL; 309 bcopy(p->p_session->s_login, sess->s_login, 310 sizeof(sess->s_login)); 311 pgrp->pg_session = sess; 312 KASSERT(p == curproc, 313 ("enterpgrp: mksession and p != curproc")); 314 } else { 315 pgrp->pg_session = p->p_session; 316 SESS_LOCK(pgrp->pg_session); 317 pgrp->pg_session->s_count++; 318 SESS_UNLOCK(pgrp->pg_session); 319 PGRP_LOCK(pgrp); 320 } 321 pgrp->pg_id = pgid; 322 LIST_INIT(&pgrp->pg_members); 323 324 /* 325 * As we have an exclusive lock of proctree_lock, 326 * this should not deadlock. 327 */ 328 LIST_INSERT_HEAD(PGRPHASH(pgid), pgrp, pg_hash); 329 pgrp->pg_jobc = 0; 330 SLIST_INIT(&pgrp->pg_sigiolst); 331 PGRP_UNLOCK(pgrp); 332 333 doenterpgrp(p, pgrp); 334 335 return (0); 336 } 337 338 /* 339 * Move p to an existing process group 340 */ 341 int 342 enterthispgrp(p, pgrp) 343 register struct proc *p; 344 struct pgrp *pgrp; 345 { 346 347 sx_assert(&proctree_lock, SX_XLOCKED); 348 PROC_LOCK_ASSERT(p, MA_NOTOWNED); 349 PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED); 350 PGRP_LOCK_ASSERT(p->p_pgrp, MA_NOTOWNED); 351 SESS_LOCK_ASSERT(p->p_session, MA_NOTOWNED); 352 KASSERT(pgrp->pg_session == p->p_session, 353 ("%s: pgrp's session %p, p->p_session %p.\n", 354 __func__, 355 pgrp->pg_session, 356 p->p_session)); 357 KASSERT(pgrp != p->p_pgrp, 358 ("%s: p belongs to pgrp.", __func__)); 359 360 doenterpgrp(p, pgrp); 361 362 return (0); 363 } 364 365 /* 366 * Move p to a process group 367 */ 368 static void 369 doenterpgrp(p, pgrp) 370 struct proc *p; 371 struct pgrp *pgrp; 372 { 373 struct pgrp *savepgrp; 374 375 sx_assert(&proctree_lock, SX_XLOCKED); 376 PROC_LOCK_ASSERT(p, MA_NOTOWNED); 377 PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED); 378 PGRP_LOCK_ASSERT(p->p_pgrp, MA_NOTOWNED); 379 SESS_LOCK_ASSERT(p->p_session, MA_NOTOWNED); 380 381 savepgrp = p->p_pgrp; 382 383 /* 384 * Adjust eligibility of affected pgrps to participate in job control. 385 * Increment eligibility counts before decrementing, otherwise we 386 * could reach 0 spuriously during the first call. 387 */ 388 fixjobc(p, pgrp, 1); 389 fixjobc(p, p->p_pgrp, 0); 390 391 PGRP_LOCK(pgrp); 392 PGRP_LOCK(savepgrp); 393 PROC_LOCK(p); 394 LIST_REMOVE(p, p_pglist); 395 p->p_pgrp = pgrp; 396 PROC_UNLOCK(p); 397 LIST_INSERT_HEAD(&pgrp->pg_members, p, p_pglist); 398 PGRP_UNLOCK(savepgrp); 399 PGRP_UNLOCK(pgrp); 400 if (LIST_EMPTY(&savepgrp->pg_members)) 401 pgdelete(savepgrp); 402 } 403 404 /* 405 * remove process from process group 406 */ 407 int 408 leavepgrp(p) 409 register struct proc *p; 410 { 411 struct pgrp *savepgrp; 412 413 sx_assert(&proctree_lock, SX_XLOCKED); 414 savepgrp = p->p_pgrp; 415 PGRP_LOCK(savepgrp); 416 PROC_LOCK(p); 417 LIST_REMOVE(p, p_pglist); 418 p->p_pgrp = NULL; 419 PROC_UNLOCK(p); 420 PGRP_UNLOCK(savepgrp); 421 if (LIST_EMPTY(&savepgrp->pg_members)) 422 pgdelete(savepgrp); 423 return (0); 424 } 425 426 /* 427 * delete a process group 428 */ 429 static void 430 pgdelete(pgrp) 431 register struct pgrp *pgrp; 432 { 433 struct session *savesess; 434 int i; 435 436 sx_assert(&proctree_lock, SX_XLOCKED); 437 PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED); 438 SESS_LOCK_ASSERT(pgrp->pg_session, MA_NOTOWNED); 439 440 /* 441 * Reset any sigio structures pointing to us as a result of 442 * F_SETOWN with our pgid. 443 */ 444 funsetownlst(&pgrp->pg_sigiolst); 445 446 PGRP_LOCK(pgrp); 447 if (pgrp->pg_session->s_ttyp != NULL && 448 pgrp->pg_session->s_ttyp->t_pgrp == pgrp) 449 pgrp->pg_session->s_ttyp->t_pgrp = NULL; 450 LIST_REMOVE(pgrp, pg_hash); 451 savesess = pgrp->pg_session; 452 SESS_LOCK(savesess); 453 i = --savesess->s_count; 454 SESS_UNLOCK(savesess); 455 PGRP_UNLOCK(pgrp); 456 if (i == 0) { 457 if (savesess->s_ttyp != NULL) 458 ttyrel(savesess->s_ttyp); 459 mtx_destroy(&savesess->s_mtx); 460 FREE(savesess, M_SESSION); 461 } 462 mtx_destroy(&pgrp->pg_mtx); 463 FREE(pgrp, M_PGRP); 464 } 465 466 static void 467 pgadjustjobc(pgrp, entering) 468 struct pgrp *pgrp; 469 int entering; 470 { 471 472 PGRP_LOCK(pgrp); 473 if (entering) 474 pgrp->pg_jobc++; 475 else { 476 --pgrp->pg_jobc; 477 if (pgrp->pg_jobc == 0) 478 orphanpg(pgrp); 479 } 480 PGRP_UNLOCK(pgrp); 481 } 482 483 /* 484 * Adjust pgrp jobc counters when specified process changes process group. 485 * We count the number of processes in each process group that "qualify" 486 * the group for terminal job control (those with a parent in a different 487 * process group of the same session). If that count reaches zero, the 488 * process group becomes orphaned. Check both the specified process' 489 * process group and that of its children. 490 * entering == 0 => p is leaving specified group. 491 * entering == 1 => p is entering specified group. 492 */ 493 void 494 fixjobc(p, pgrp, entering) 495 register struct proc *p; 496 register struct pgrp *pgrp; 497 int entering; 498 { 499 register struct pgrp *hispgrp; 500 register struct session *mysession; 501 502 sx_assert(&proctree_lock, SX_LOCKED); 503 PROC_LOCK_ASSERT(p, MA_NOTOWNED); 504 PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED); 505 SESS_LOCK_ASSERT(pgrp->pg_session, MA_NOTOWNED); 506 507 /* 508 * Check p's parent to see whether p qualifies its own process 509 * group; if so, adjust count for p's process group. 510 */ 511 mysession = pgrp->pg_session; 512 if ((hispgrp = p->p_pptr->p_pgrp) != pgrp && 513 hispgrp->pg_session == mysession) 514 pgadjustjobc(pgrp, entering); 515 516 /* 517 * Check this process' children to see whether they qualify 518 * their process groups; if so, adjust counts for children's 519 * process groups. 520 */ 521 LIST_FOREACH(p, &p->p_children, p_sibling) { 522 hispgrp = p->p_pgrp; 523 if (hispgrp == pgrp || 524 hispgrp->pg_session != mysession) 525 continue; 526 PROC_LOCK(p); 527 if (p->p_state == PRS_ZOMBIE) { 528 PROC_UNLOCK(p); 529 continue; 530 } 531 PROC_UNLOCK(p); 532 pgadjustjobc(hispgrp, entering); 533 } 534 } 535 536 /* 537 * A process group has become orphaned; 538 * if there are any stopped processes in the group, 539 * hang-up all process in that group. 540 */ 541 static void 542 orphanpg(pg) 543 struct pgrp *pg; 544 { 545 register struct proc *p; 546 547 PGRP_LOCK_ASSERT(pg, MA_OWNED); 548 549 LIST_FOREACH(p, &pg->pg_members, p_pglist) { 550 PROC_LOCK(p); 551 if (P_SHOULDSTOP(p)) { 552 PROC_UNLOCK(p); 553 LIST_FOREACH(p, &pg->pg_members, p_pglist) { 554 PROC_LOCK(p); 555 psignal(p, SIGHUP); 556 psignal(p, SIGCONT); 557 PROC_UNLOCK(p); 558 } 559 return; 560 } 561 PROC_UNLOCK(p); 562 } 563 } 564 565 #include "opt_ddb.h" 566 #ifdef DDB 567 #include <ddb/ddb.h> 568 569 DB_SHOW_COMMAND(pgrpdump, pgrpdump) 570 { 571 register struct pgrp *pgrp; 572 register struct proc *p; 573 register int i; 574 575 for (i = 0; i <= pgrphash; i++) { 576 if (!LIST_EMPTY(&pgrphashtbl[i])) { 577 printf("\tindx %d\n", i); 578 LIST_FOREACH(pgrp, &pgrphashtbl[i], pg_hash) { 579 printf( 580 "\tpgrp %p, pgid %ld, sess %p, sesscnt %d, mem %p\n", 581 (void *)pgrp, (long)pgrp->pg_id, 582 (void *)pgrp->pg_session, 583 pgrp->pg_session->s_count, 584 (void *)LIST_FIRST(&pgrp->pg_members)); 585 LIST_FOREACH(p, &pgrp->pg_members, p_pglist) { 586 printf("\t\tpid %ld addr %p pgrp %p\n", 587 (long)p->p_pid, (void *)p, 588 (void *)p->p_pgrp); 589 } 590 } 591 } 592 } 593 } 594 #endif /* DDB */ 595 void 596 fill_kinfo_thread(struct thread *td, struct kinfo_proc *kp); 597 598 /* 599 * Fill in a kinfo_proc structure for the specified process. 600 * Must be called with the target process locked. 601 */ 602 void 603 fill_kinfo_proc(struct proc *p, struct kinfo_proc *kp) 604 { 605 fill_kinfo_thread(FIRST_THREAD_IN_PROC(p), kp); 606 } 607 608 void 609 fill_kinfo_thread(struct thread *td, struct kinfo_proc *kp) 610 { 611 struct proc *p; 612 struct thread *td0; 613 struct ksegrp *kg; 614 struct tty *tp; 615 struct session *sp; 616 struct timeval tv; 617 struct sigacts *ps; 618 619 p = td->td_proc; 620 621 bzero(kp, sizeof(*kp)); 622 623 kp->ki_structsize = sizeof(*kp); 624 kp->ki_paddr = p; 625 PROC_LOCK_ASSERT(p, MA_OWNED); 626 kp->ki_addr =/* p->p_addr; */0; /* XXXKSE */ 627 kp->ki_args = p->p_args; 628 kp->ki_textvp = p->p_textvp; 629 #ifdef KTRACE 630 kp->ki_tracep = p->p_tracevp; 631 mtx_lock(&ktrace_mtx); 632 kp->ki_traceflag = p->p_traceflag; 633 mtx_unlock(&ktrace_mtx); 634 #endif 635 kp->ki_fd = p->p_fd; 636 kp->ki_vmspace = p->p_vmspace; 637 if (p->p_ucred) { 638 kp->ki_uid = p->p_ucred->cr_uid; 639 kp->ki_ruid = p->p_ucred->cr_ruid; 640 kp->ki_svuid = p->p_ucred->cr_svuid; 641 /* XXX bde doesn't like KI_NGROUPS */ 642 kp->ki_ngroups = min(p->p_ucred->cr_ngroups, KI_NGROUPS); 643 bcopy(p->p_ucred->cr_groups, kp->ki_groups, 644 kp->ki_ngroups * sizeof(gid_t)); 645 kp->ki_rgid = p->p_ucred->cr_rgid; 646 kp->ki_svgid = p->p_ucred->cr_svgid; 647 } 648 if (p->p_sigacts) { 649 ps = p->p_sigacts; 650 mtx_lock(&ps->ps_mtx); 651 kp->ki_sigignore = ps->ps_sigignore; 652 kp->ki_sigcatch = ps->ps_sigcatch; 653 mtx_unlock(&ps->ps_mtx); 654 } 655 mtx_lock_spin(&sched_lock); 656 if (p->p_state != PRS_NEW && 657 p->p_state != PRS_ZOMBIE && 658 p->p_vmspace != NULL) { 659 struct vmspace *vm = p->p_vmspace; 660 661 kp->ki_size = vm->vm_map.size; 662 kp->ki_rssize = vmspace_resident_count(vm); /*XXX*/ 663 if (p->p_sflag & PS_INMEM) 664 kp->ki_rssize += UAREA_PAGES; 665 FOREACH_THREAD_IN_PROC(p, td0) { 666 if (!TD_IS_SWAPPED(td0)) 667 kp->ki_rssize += td0->td_kstack_pages; 668 if (td0->td_altkstack_obj != NULL) 669 kp->ki_rssize += td0->td_altkstack_pages; 670 } 671 kp->ki_swrss = vm->vm_swrss; 672 kp->ki_tsize = vm->vm_tsize; 673 kp->ki_dsize = vm->vm_dsize; 674 kp->ki_ssize = vm->vm_ssize; 675 } 676 kp->ki_sflag = p->p_sflag; 677 kp->ki_swtime = p->p_swtime; 678 kp->ki_pid = p->p_pid; 679 kp->ki_nice = p->p_nice; 680 bintime2timeval(&p->p_rux.rux_runtime, &tv); 681 kp->ki_runtime = tv.tv_sec * (u_int64_t)1000000 + tv.tv_usec; 682 if (p->p_state != PRS_ZOMBIE) { 683 #if 0 684 if (td == NULL) { 685 /* XXXKSE: This should never happen. */ 686 printf("fill_kinfo_proc(): pid %d has no threads!\n", 687 p->p_pid); 688 mtx_unlock_spin(&sched_lock); 689 return; 690 } 691 #endif 692 if (td->td_wmesg != NULL) { 693 strlcpy(kp->ki_wmesg, td->td_wmesg, 694 sizeof(kp->ki_wmesg)); 695 } 696 if (TD_ON_LOCK(td)) { 697 kp->ki_kiflag |= KI_LOCKBLOCK; 698 strlcpy(kp->ki_lockname, td->td_lockname, 699 sizeof(kp->ki_lockname)); 700 } 701 702 if (p->p_state == PRS_NORMAL) { /* XXXKSE very approximate */ 703 if (TD_ON_RUNQ(td) || 704 TD_CAN_RUN(td) || 705 TD_IS_RUNNING(td)) { 706 kp->ki_stat = SRUN; 707 } else if (P_SHOULDSTOP(p)) { 708 kp->ki_stat = SSTOP; 709 } else if (TD_IS_SLEEPING(td)) { 710 kp->ki_stat = SSLEEP; 711 } else if (TD_ON_LOCK(td)) { 712 kp->ki_stat = SLOCK; 713 } else { 714 kp->ki_stat = SWAIT; 715 } 716 } else { 717 kp->ki_stat = SIDL; 718 } 719 720 kg = td->td_ksegrp; 721 722 /* things in the KSE GROUP */ 723 kp->ki_estcpu = kg->kg_estcpu; 724 kp->ki_slptime = kg->kg_slptime; 725 kp->ki_pri.pri_user = kg->kg_user_pri; 726 kp->ki_pri.pri_class = kg->kg_pri_class; 727 728 /* Things in the thread */ 729 kp->ki_wchan = td->td_wchan; 730 kp->ki_pri.pri_level = td->td_priority; 731 kp->ki_pri.pri_native = td->td_base_pri; 732 kp->ki_lastcpu = td->td_lastcpu; 733 kp->ki_oncpu = td->td_oncpu; 734 kp->ki_tdflags = td->td_flags; 735 kp->ki_tid = td->td_tid; 736 kp->ki_numthreads = p->p_numthreads; 737 kp->ki_pcb = td->td_pcb; 738 kp->ki_kstack = (void *)td->td_kstack; 739 kp->ki_pctcpu = sched_pctcpu(td); 740 741 /* We can't get this anymore but ps etc never used it anyway. */ 742 kp->ki_rqindex = 0; 743 744 } else { 745 kp->ki_stat = SZOMB; 746 } 747 mtx_unlock_spin(&sched_lock); 748 if ((p->p_sflag & PS_INMEM) && p->p_stats != NULL) { 749 kp->ki_start = p->p_stats->p_start; 750 timevaladd(&kp->ki_start, &boottime); 751 kp->ki_rusage = p->p_stats->p_ru; 752 calcru(p, &kp->ki_rusage.ru_utime, &kp->ki_rusage.ru_stime); 753 calccru(p, &kp->ki_childutime, &kp->ki_childstime); 754 755 /* Some callers want child-times in a single value */ 756 kp->ki_childtime = kp->ki_childstime; 757 timevaladd(&kp->ki_childtime, &kp->ki_childutime); 758 } 759 sp = NULL; 760 tp = NULL; 761 if (p->p_pgrp) { 762 kp->ki_pgid = p->p_pgrp->pg_id; 763 kp->ki_jobc = p->p_pgrp->pg_jobc; 764 sp = p->p_pgrp->pg_session; 765 766 if (sp != NULL) { 767 kp->ki_sid = sp->s_sid; 768 SESS_LOCK(sp); 769 strlcpy(kp->ki_login, sp->s_login, 770 sizeof(kp->ki_login)); 771 if (sp->s_ttyvp) 772 kp->ki_kiflag |= KI_CTTY; 773 if (SESS_LEADER(p)) 774 kp->ki_kiflag |= KI_SLEADER; 775 tp = sp->s_ttyp; 776 SESS_UNLOCK(sp); 777 } 778 } 779 if ((p->p_flag & P_CONTROLT) && tp != NULL) { 780 kp->ki_tdev = dev2udev(tp->t_dev); 781 kp->ki_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 782 if (tp->t_session) 783 kp->ki_tsid = tp->t_session->s_sid; 784 } else 785 kp->ki_tdev = NODEV; 786 if (p->p_comm[0] != '\0') { 787 strlcpy(kp->ki_comm, p->p_comm, sizeof(kp->ki_comm)); 788 strlcpy(kp->ki_ocomm, p->p_comm, sizeof(kp->ki_ocomm)); 789 } 790 if (p->p_sysent && p->p_sysent->sv_name != NULL && 791 p->p_sysent->sv_name[0] != '\0') 792 strlcpy(kp->ki_emul, p->p_sysent->sv_name, sizeof(kp->ki_emul)); 793 kp->ki_siglist = p->p_siglist; 794 SIGSETOR(kp->ki_siglist, td->td_siglist); 795 kp->ki_sigmask = td->td_sigmask; 796 kp->ki_xstat = p->p_xstat; 797 kp->ki_acflag = p->p_acflag; 798 kp->ki_flag = p->p_flag; 799 /* If jailed(p->p_ucred), emulate the old P_JAILED flag. */ 800 if (jailed(p->p_ucred)) 801 kp->ki_flag |= P_JAILED; 802 kp->ki_lock = p->p_lock; 803 if (p->p_pptr) 804 kp->ki_ppid = p->p_pptr->p_pid; 805 } 806 807 /* 808 * Locate a zombie process by number 809 */ 810 struct proc * 811 zpfind(pid_t pid) 812 { 813 struct proc *p; 814 815 sx_slock(&allproc_lock); 816 LIST_FOREACH(p, &zombproc, p_list) 817 if (p->p_pid == pid) { 818 PROC_LOCK(p); 819 break; 820 } 821 sx_sunlock(&allproc_lock); 822 return (p); 823 } 824 825 #define KERN_PROC_ZOMBMASK 0x3 826 #define KERN_PROC_NOTHREADS 0x4 827 828 /* 829 * Must be called with the process locked and will return with it unlocked. 830 */ 831 static int 832 sysctl_out_proc(struct proc *p, struct sysctl_req *req, int flags) 833 { 834 struct thread *td; 835 struct kinfo_proc kinfo_proc; 836 int error = 0; 837 struct proc *np; 838 pid_t pid = p->p_pid; 839 840 PROC_LOCK_ASSERT(p, MA_OWNED); 841 842 if (flags & KERN_PROC_NOTHREADS) { 843 fill_kinfo_proc(p, &kinfo_proc); 844 PROC_UNLOCK(p); 845 error = SYSCTL_OUT(req, (caddr_t)&kinfo_proc, 846 sizeof(kinfo_proc)); 847 PROC_LOCK(p); 848 } else { 849 _PHOLD(p); 850 FOREACH_THREAD_IN_PROC(p, td) { 851 fill_kinfo_thread(td, &kinfo_proc); 852 PROC_UNLOCK(p); 853 error = SYSCTL_OUT(req, (caddr_t)&kinfo_proc, 854 sizeof(kinfo_proc)); 855 PROC_LOCK(p); 856 if (error) 857 break; 858 } 859 _PRELE(p); 860 } 861 PROC_UNLOCK(p); 862 if (error) 863 return (error); 864 if (flags & KERN_PROC_ZOMBMASK) 865 np = zpfind(pid); 866 else { 867 if (pid == 0) 868 return (0); 869 np = pfind(pid); 870 } 871 if (np == NULL) 872 return EAGAIN; 873 if (np != p) { 874 PROC_UNLOCK(np); 875 return EAGAIN; 876 } 877 PROC_UNLOCK(np); 878 return (0); 879 } 880 881 static int 882 sysctl_kern_proc(SYSCTL_HANDLER_ARGS) 883 { 884 int *name = (int*) arg1; 885 u_int namelen = arg2; 886 struct proc *p; 887 int flags, doingzomb, oid_number; 888 int error = 0; 889 890 oid_number = oidp->oid_number; 891 if (oid_number != KERN_PROC_ALL && 892 (oid_number & KERN_PROC_INC_THREAD) == 0) 893 flags = KERN_PROC_NOTHREADS; 894 else { 895 flags = 0; 896 oid_number &= ~KERN_PROC_INC_THREAD; 897 } 898 if (oid_number == KERN_PROC_PID) { 899 if (namelen != 1) 900 return (EINVAL); 901 p = pfind((pid_t)name[0]); 902 if (!p) 903 return (ESRCH); 904 if ((error = p_cansee(curthread, p))) { 905 PROC_UNLOCK(p); 906 return (error); 907 } 908 error = sysctl_out_proc(p, req, flags); 909 return (error); 910 } 911 912 switch (oid_number) { 913 case KERN_PROC_ALL: 914 if (namelen != 0) 915 return (EINVAL); 916 break; 917 case KERN_PROC_PROC: 918 if (namelen != 0 && namelen != 1) 919 return (EINVAL); 920 break; 921 default: 922 if (namelen != 1) 923 return (EINVAL); 924 break; 925 } 926 927 if (!req->oldptr) { 928 /* overestimate by 5 procs */ 929 error = SYSCTL_OUT(req, 0, sizeof (struct kinfo_proc) * 5); 930 if (error) 931 return (error); 932 } 933 error = sysctl_wire_old_buffer(req, 0); 934 if (error != 0) 935 return (error); 936 sx_slock(&allproc_lock); 937 for (doingzomb=0 ; doingzomb < 2 ; doingzomb++) { 938 if (!doingzomb) 939 p = LIST_FIRST(&allproc); 940 else 941 p = LIST_FIRST(&zombproc); 942 for (; p != 0; p = LIST_NEXT(p, p_list)) { 943 /* 944 * Skip embryonic processes. 945 */ 946 mtx_lock_spin(&sched_lock); 947 if (p->p_state == PRS_NEW) { 948 mtx_unlock_spin(&sched_lock); 949 continue; 950 } 951 mtx_unlock_spin(&sched_lock); 952 PROC_LOCK(p); 953 /* 954 * Show a user only appropriate processes. 955 */ 956 if (p_cansee(curthread, p)) { 957 PROC_UNLOCK(p); 958 continue; 959 } 960 /* 961 * TODO - make more efficient (see notes below). 962 * do by session. 963 */ 964 switch (oid_number) { 965 966 case KERN_PROC_GID: 967 if (p->p_ucred == NULL || 968 p->p_ucred->cr_gid != (gid_t)name[0]) { 969 PROC_UNLOCK(p); 970 continue; 971 } 972 break; 973 974 case KERN_PROC_PGRP: 975 /* could do this by traversing pgrp */ 976 if (p->p_pgrp == NULL || 977 p->p_pgrp->pg_id != (pid_t)name[0]) { 978 PROC_UNLOCK(p); 979 continue; 980 } 981 break; 982 983 case KERN_PROC_RGID: 984 if (p->p_ucred == NULL || 985 p->p_ucred->cr_rgid != (gid_t)name[0]) { 986 PROC_UNLOCK(p); 987 continue; 988 } 989 break; 990 991 case KERN_PROC_SESSION: 992 if (p->p_session == NULL || 993 p->p_session->s_sid != (pid_t)name[0]) { 994 PROC_UNLOCK(p); 995 continue; 996 } 997 break; 998 999 case KERN_PROC_TTY: 1000 if ((p->p_flag & P_CONTROLT) == 0 || 1001 p->p_session == NULL) { 1002 PROC_UNLOCK(p); 1003 continue; 1004 } 1005 SESS_LOCK(p->p_session); 1006 if (p->p_session->s_ttyp == NULL || 1007 dev2udev(p->p_session->s_ttyp->t_dev) != 1008 (dev_t)name[0]) { 1009 SESS_UNLOCK(p->p_session); 1010 PROC_UNLOCK(p); 1011 continue; 1012 } 1013 SESS_UNLOCK(p->p_session); 1014 break; 1015 1016 case KERN_PROC_UID: 1017 if (p->p_ucred == NULL || 1018 p->p_ucred->cr_uid != (uid_t)name[0]) { 1019 PROC_UNLOCK(p); 1020 continue; 1021 } 1022 break; 1023 1024 case KERN_PROC_RUID: 1025 if (p->p_ucred == NULL || 1026 p->p_ucred->cr_ruid != (uid_t)name[0]) { 1027 PROC_UNLOCK(p); 1028 continue; 1029 } 1030 break; 1031 1032 case KERN_PROC_PROC: 1033 break; 1034 1035 default: 1036 break; 1037 1038 } 1039 1040 error = sysctl_out_proc(p, req, flags | doingzomb); 1041 if (error) { 1042 sx_sunlock(&allproc_lock); 1043 return (error); 1044 } 1045 } 1046 } 1047 sx_sunlock(&allproc_lock); 1048 return (0); 1049 } 1050 1051 struct pargs * 1052 pargs_alloc(int len) 1053 { 1054 struct pargs *pa; 1055 1056 MALLOC(pa, struct pargs *, sizeof(struct pargs) + len, M_PARGS, 1057 M_WAITOK); 1058 pa->ar_ref = 1; 1059 pa->ar_length = len; 1060 return (pa); 1061 } 1062 1063 void 1064 pargs_free(struct pargs *pa) 1065 { 1066 1067 FREE(pa, M_PARGS); 1068 } 1069 1070 void 1071 pargs_hold(struct pargs *pa) 1072 { 1073 1074 if (pa == NULL) 1075 return; 1076 PARGS_LOCK(pa); 1077 pa->ar_ref++; 1078 PARGS_UNLOCK(pa); 1079 } 1080 1081 void 1082 pargs_drop(struct pargs *pa) 1083 { 1084 1085 if (pa == NULL) 1086 return; 1087 PARGS_LOCK(pa); 1088 if (--pa->ar_ref == 0) { 1089 PARGS_UNLOCK(pa); 1090 pargs_free(pa); 1091 } else 1092 PARGS_UNLOCK(pa); 1093 } 1094 1095 /* 1096 * This sysctl allows a process to retrieve the argument list or process 1097 * title for another process without groping around in the address space 1098 * of the other process. It also allow a process to set its own "process 1099 * title to a string of its own choice. 1100 */ 1101 static int 1102 sysctl_kern_proc_args(SYSCTL_HANDLER_ARGS) 1103 { 1104 int *name = (int*) arg1; 1105 u_int namelen = arg2; 1106 struct pargs *newpa, *pa; 1107 struct proc *p; 1108 int error = 0; 1109 1110 if (namelen != 1) 1111 return (EINVAL); 1112 1113 p = pfind((pid_t)name[0]); 1114 if (!p) 1115 return (ESRCH); 1116 1117 if ((error = p_cansee(curthread, p)) != 0) { 1118 PROC_UNLOCK(p); 1119 return (error); 1120 } 1121 1122 if (req->newptr && curproc != p) { 1123 PROC_UNLOCK(p); 1124 return (EPERM); 1125 } 1126 1127 pa = p->p_args; 1128 pargs_hold(pa); 1129 PROC_UNLOCK(p); 1130 if (req->oldptr != NULL && pa != NULL) 1131 error = SYSCTL_OUT(req, pa->ar_args, pa->ar_length); 1132 pargs_drop(pa); 1133 if (error != 0 || req->newptr == NULL) 1134 return (error); 1135 1136 if (req->newlen + sizeof(struct pargs) > ps_arg_cache_limit) 1137 return (ENOMEM); 1138 newpa = pargs_alloc(req->newlen); 1139 error = SYSCTL_IN(req, newpa->ar_args, req->newlen); 1140 if (error != 0) { 1141 pargs_free(newpa); 1142 return (error); 1143 } 1144 PROC_LOCK(p); 1145 pa = p->p_args; 1146 p->p_args = newpa; 1147 PROC_UNLOCK(p); 1148 pargs_drop(pa); 1149 return (0); 1150 } 1151 1152 static int 1153 sysctl_kern_proc_sv_name(SYSCTL_HANDLER_ARGS) 1154 { 1155 struct proc *p; 1156 char *sv_name; 1157 int *name; 1158 int namelen; 1159 int error; 1160 1161 namelen = arg2; 1162 if (namelen != 1) 1163 return (EINVAL); 1164 1165 name = (int *)arg1; 1166 if ((p = pfind((pid_t)name[0])) == NULL) 1167 return (ESRCH); 1168 if ((error = p_cansee(curthread, p))) { 1169 PROC_UNLOCK(p); 1170 return (error); 1171 } 1172 sv_name = p->p_sysent->sv_name; 1173 PROC_UNLOCK(p); 1174 return (sysctl_handle_string(oidp, sv_name, 0, req)); 1175 } 1176 1177 1178 SYSCTL_NODE(_kern, KERN_PROC, proc, CTLFLAG_RD, 0, "Process table"); 1179 1180 SYSCTL_PROC(_kern_proc, KERN_PROC_ALL, all, CTLFLAG_RD|CTLTYPE_STRUCT, 1181 0, 0, sysctl_kern_proc, "S,proc", "Return entire process table"); 1182 1183 SYSCTL_NODE(_kern_proc, KERN_PROC_GID, gid, CTLFLAG_RD, 1184 sysctl_kern_proc, "Process table"); 1185 1186 SYSCTL_NODE(_kern_proc, KERN_PROC_PGRP, pgrp, CTLFLAG_RD, 1187 sysctl_kern_proc, "Process table"); 1188 1189 SYSCTL_NODE(_kern_proc, KERN_PROC_RGID, rgid, CTLFLAG_RD, 1190 sysctl_kern_proc, "Process table"); 1191 1192 SYSCTL_NODE(_kern_proc, KERN_PROC_SESSION, sid, CTLFLAG_RD, 1193 sysctl_kern_proc, "Process table"); 1194 1195 SYSCTL_NODE(_kern_proc, KERN_PROC_TTY, tty, CTLFLAG_RD, 1196 sysctl_kern_proc, "Process table"); 1197 1198 SYSCTL_NODE(_kern_proc, KERN_PROC_UID, uid, CTLFLAG_RD, 1199 sysctl_kern_proc, "Process table"); 1200 1201 SYSCTL_NODE(_kern_proc, KERN_PROC_RUID, ruid, CTLFLAG_RD, 1202 sysctl_kern_proc, "Process table"); 1203 1204 SYSCTL_NODE(_kern_proc, KERN_PROC_PID, pid, CTLFLAG_RD, 1205 sysctl_kern_proc, "Process table"); 1206 1207 SYSCTL_NODE(_kern_proc, KERN_PROC_PROC, proc, CTLFLAG_RD, 1208 sysctl_kern_proc, "Return process table, no threads"); 1209 1210 SYSCTL_NODE(_kern_proc, KERN_PROC_ARGS, args, CTLFLAG_RW | CTLFLAG_ANYBODY, 1211 sysctl_kern_proc_args, "Process argument list"); 1212 1213 SYSCTL_NODE(_kern_proc, KERN_PROC_SV_NAME, sv_name, CTLFLAG_RD, 1214 sysctl_kern_proc_sv_name, "Process syscall vector name (ABI type)"); 1215 1216 SYSCTL_NODE(_kern_proc, (KERN_PROC_GID | KERN_PROC_INC_THREAD), gid_td, 1217 CTLFLAG_RD, sysctl_kern_proc, "Process table"); 1218 1219 SYSCTL_NODE(_kern_proc, (KERN_PROC_PGRP | KERN_PROC_INC_THREAD), pgrp_td, 1220 CTLFLAG_RD, sysctl_kern_proc, "Process table"); 1221 1222 SYSCTL_NODE(_kern_proc, (KERN_PROC_RGID | KERN_PROC_INC_THREAD), rgid_td, 1223 CTLFLAG_RD, sysctl_kern_proc, "Process table"); 1224 1225 SYSCTL_NODE(_kern_proc, (KERN_PROC_SESSION | KERN_PROC_INC_THREAD), sid_td, 1226 CTLFLAG_RD, sysctl_kern_proc, "Process table"); 1227 1228 SYSCTL_NODE(_kern_proc, (KERN_PROC_TTY | KERN_PROC_INC_THREAD), tty_td, 1229 CTLFLAG_RD, sysctl_kern_proc, "Process table"); 1230 1231 SYSCTL_NODE(_kern_proc, (KERN_PROC_UID | KERN_PROC_INC_THREAD), uid_td, 1232 CTLFLAG_RD, sysctl_kern_proc, "Process table"); 1233 1234 SYSCTL_NODE(_kern_proc, (KERN_PROC_RUID | KERN_PROC_INC_THREAD), ruid_td, 1235 CTLFLAG_RD, sysctl_kern_proc, "Process table"); 1236 1237 SYSCTL_NODE(_kern_proc, (KERN_PROC_PID | KERN_PROC_INC_THREAD), pid_td, 1238 CTLFLAG_RD, sysctl_kern_proc, "Process table"); 1239 1240 SYSCTL_NODE(_kern_proc, (KERN_PROC_PROC | KERN_PROC_INC_THREAD), proc_td, 1241 CTLFLAG_RD, sysctl_kern_proc, "Return process table, no threads"); 1242