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 void proc_ctor(void *mem, int size, void *arg); 78 static void proc_dtor(void *mem, int size, void *arg); 79 static void proc_init(void *mem, int size); 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 #define RANGEOF(type, start, end) (offsetof(type, end) - offsetof(type, start)) 104 105 CTASSERT(sizeof(struct kinfo_proc) == KINFO_PROC_SIZE); 106 107 /* 108 * Initialize global process hashing structures. 109 */ 110 void 111 procinit() 112 { 113 114 sx_init(&allproc_lock, "allproc"); 115 sx_init(&proctree_lock, "proctree"); 116 mtx_init(&pargs_ref_lock, "struct pargs.ref", NULL, MTX_DEF); 117 mtx_init(&ppeers_lock, "p_peers", NULL, MTX_DEF); 118 LIST_INIT(&allproc); 119 LIST_INIT(&zombproc); 120 pidhashtbl = hashinit(maxproc / 4, M_PROC, &pidhash); 121 pgrphashtbl = hashinit(maxproc / 4, M_PROC, &pgrphash); 122 proc_zone = uma_zcreate("PROC", sched_sizeof_proc(), 123 proc_ctor, proc_dtor, proc_init, proc_fini, 124 UMA_ALIGN_PTR, UMA_ZONE_NOFREE); 125 uihashinit(); 126 } 127 128 /* 129 * Prepare a proc for use. 130 */ 131 static void 132 proc_ctor(void *mem, int size, void *arg) 133 { 134 struct proc *p; 135 136 p = (struct proc *)mem; 137 } 138 139 /* 140 * Reclaim a proc after use. 141 */ 142 static void 143 proc_dtor(void *mem, int size, void *arg) 144 { 145 struct proc *p; 146 struct thread *td; 147 struct ksegrp *kg; 148 struct kse *ke; 149 150 /* INVARIANTS checks go here */ 151 p = (struct proc *)mem; 152 KASSERT((p->p_numthreads == 1), 153 ("bad number of threads in exiting process")); 154 td = FIRST_THREAD_IN_PROC(p); 155 KASSERT((td != NULL), ("proc_dtor: bad thread pointer")); 156 kg = FIRST_KSEGRP_IN_PROC(p); 157 KASSERT((kg != NULL), ("proc_dtor: bad kg pointer")); 158 ke = FIRST_KSE_IN_KSEGRP(kg); 159 KASSERT((ke != NULL), ("proc_dtor: bad ke pointer")); 160 161 /* Dispose of an alternate kstack, if it exists. 162 * XXX What if there are more than one thread in the proc? 163 * The first thread in the proc is special and not 164 * freed, so you gotta do this here. 165 */ 166 if (((p->p_flag & P_KTHREAD) != 0) && (td->td_altkstack != 0)) 167 vm_thread_dispose_altkstack(td); 168 169 /* 170 * We want to make sure we know the initial linkages. 171 * so for now tear them down and remake them. 172 * This is probably un-needed as we can probably rely 173 * on the state coming in here from wait4(). 174 */ 175 proc_linkup(p, kg, ke, td); 176 } 177 178 /* 179 * Initialize type-stable parts of a proc (when newly created). 180 */ 181 static void 182 proc_init(void *mem, int size) 183 { 184 struct proc *p; 185 struct thread *td; 186 struct ksegrp *kg; 187 struct kse *ke; 188 189 p = (struct proc *)mem; 190 p->p_sched = (struct p_sched *)&p[1]; 191 vm_proc_new(p); 192 td = thread_alloc(); 193 ke = kse_alloc(); 194 kg = ksegrp_alloc(); 195 proc_linkup(p, kg, ke, td); 196 bzero(&p->p_mtx, sizeof(struct mtx)); 197 mtx_init(&p->p_mtx, "process lock", NULL, MTX_DEF | MTX_DUPOK); 198 } 199 200 /* 201 * Tear down type-stable parts of a proc (just before being discarded) 202 */ 203 static void 204 proc_fini(void *mem, int size) 205 { 206 struct proc *p; 207 struct thread *td; 208 struct ksegrp *kg; 209 struct kse *ke; 210 211 p = (struct proc *)mem; 212 KASSERT((p->p_numthreads == 1), 213 ("bad number of threads in freeing process")); 214 td = FIRST_THREAD_IN_PROC(p); 215 KASSERT((td != NULL), ("proc_dtor: bad thread pointer")); 216 kg = FIRST_KSEGRP_IN_PROC(p); 217 KASSERT((kg != NULL), ("proc_dtor: bad kg pointer")); 218 ke = FIRST_KSE_IN_KSEGRP(kg); 219 KASSERT((ke != NULL), ("proc_dtor: bad ke pointer")); 220 vm_proc_dispose(p); 221 thread_free(td); 222 ksegrp_free(kg); 223 kse_free(ke); 224 mtx_destroy(&p->p_mtx); 225 } 226 227 /* 228 * Is p an inferior of the current process? 229 */ 230 int 231 inferior(p) 232 register struct proc *p; 233 { 234 235 sx_assert(&proctree_lock, SX_LOCKED); 236 for (; p != curproc; p = p->p_pptr) 237 if (p->p_pid == 0) 238 return (0); 239 return (1); 240 } 241 242 /* 243 * Locate a process by number 244 */ 245 struct proc * 246 pfind(pid) 247 register pid_t pid; 248 { 249 register struct proc *p; 250 251 sx_slock(&allproc_lock); 252 LIST_FOREACH(p, PIDHASH(pid), p_hash) 253 if (p->p_pid == pid) { 254 PROC_LOCK(p); 255 break; 256 } 257 sx_sunlock(&allproc_lock); 258 return (p); 259 } 260 261 /* 262 * Locate a process group by number. 263 * The caller must hold proctree_lock. 264 */ 265 struct pgrp * 266 pgfind(pgid) 267 register pid_t pgid; 268 { 269 register struct pgrp *pgrp; 270 271 sx_assert(&proctree_lock, SX_LOCKED); 272 273 LIST_FOREACH(pgrp, PGRPHASH(pgid), pg_hash) { 274 if (pgrp->pg_id == pgid) { 275 PGRP_LOCK(pgrp); 276 return (pgrp); 277 } 278 } 279 return (NULL); 280 } 281 282 /* 283 * Create a new process group. 284 * pgid must be equal to the pid of p. 285 * Begin a new session if required. 286 */ 287 int 288 enterpgrp(p, pgid, pgrp, sess) 289 register struct proc *p; 290 pid_t pgid; 291 struct pgrp *pgrp; 292 struct session *sess; 293 { 294 struct pgrp *pgrp2; 295 296 sx_assert(&proctree_lock, SX_XLOCKED); 297 298 KASSERT(pgrp != NULL, ("enterpgrp: pgrp == NULL")); 299 KASSERT(p->p_pid == pgid, 300 ("enterpgrp: new pgrp and pid != pgid")); 301 302 pgrp2 = pgfind(pgid); 303 304 KASSERT(pgrp2 == NULL, 305 ("enterpgrp: pgrp with pgid exists")); 306 KASSERT(!SESS_LEADER(p), 307 ("enterpgrp: session leader attempted setpgrp")); 308 309 mtx_init(&pgrp->pg_mtx, "process group", NULL, MTX_DEF | MTX_DUPOK); 310 311 if (sess != NULL) { 312 /* 313 * new session 314 */ 315 mtx_init(&sess->s_mtx, "session", NULL, MTX_DEF); 316 PROC_LOCK(p); 317 p->p_flag &= ~P_CONTROLT; 318 PROC_UNLOCK(p); 319 PGRP_LOCK(pgrp); 320 sess->s_leader = p; 321 sess->s_sid = p->p_pid; 322 sess->s_count = 1; 323 sess->s_ttyvp = NULL; 324 sess->s_ttyp = NULL; 325 bcopy(p->p_session->s_login, sess->s_login, 326 sizeof(sess->s_login)); 327 pgrp->pg_session = sess; 328 KASSERT(p == curproc, 329 ("enterpgrp: mksession and p != curproc")); 330 } else { 331 pgrp->pg_session = p->p_session; 332 SESS_LOCK(pgrp->pg_session); 333 pgrp->pg_session->s_count++; 334 SESS_UNLOCK(pgrp->pg_session); 335 PGRP_LOCK(pgrp); 336 } 337 pgrp->pg_id = pgid; 338 LIST_INIT(&pgrp->pg_members); 339 340 /* 341 * As we have an exclusive lock of proctree_lock, 342 * this should not deadlock. 343 */ 344 LIST_INSERT_HEAD(PGRPHASH(pgid), pgrp, pg_hash); 345 pgrp->pg_jobc = 0; 346 SLIST_INIT(&pgrp->pg_sigiolst); 347 PGRP_UNLOCK(pgrp); 348 349 doenterpgrp(p, pgrp); 350 351 return (0); 352 } 353 354 /* 355 * Move p to an existing process group 356 */ 357 int 358 enterthispgrp(p, pgrp) 359 register struct proc *p; 360 struct pgrp *pgrp; 361 { 362 363 sx_assert(&proctree_lock, SX_XLOCKED); 364 PROC_LOCK_ASSERT(p, MA_NOTOWNED); 365 PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED); 366 PGRP_LOCK_ASSERT(p->p_pgrp, MA_NOTOWNED); 367 SESS_LOCK_ASSERT(p->p_session, MA_NOTOWNED); 368 KASSERT(pgrp->pg_session == p->p_session, 369 ("%s: pgrp's session %p, p->p_session %p.\n", 370 __func__, 371 pgrp->pg_session, 372 p->p_session)); 373 KASSERT(pgrp != p->p_pgrp, 374 ("%s: p belongs to pgrp.", __func__)); 375 376 doenterpgrp(p, pgrp); 377 378 return (0); 379 } 380 381 /* 382 * Move p to a process group 383 */ 384 static void 385 doenterpgrp(p, pgrp) 386 struct proc *p; 387 struct pgrp *pgrp; 388 { 389 struct pgrp *savepgrp; 390 391 sx_assert(&proctree_lock, SX_XLOCKED); 392 PROC_LOCK_ASSERT(p, MA_NOTOWNED); 393 PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED); 394 PGRP_LOCK_ASSERT(p->p_pgrp, MA_NOTOWNED); 395 SESS_LOCK_ASSERT(p->p_session, MA_NOTOWNED); 396 397 savepgrp = p->p_pgrp; 398 399 /* 400 * Adjust eligibility of affected pgrps to participate in job control. 401 * Increment eligibility counts before decrementing, otherwise we 402 * could reach 0 spuriously during the first call. 403 */ 404 fixjobc(p, pgrp, 1); 405 fixjobc(p, p->p_pgrp, 0); 406 407 PGRP_LOCK(pgrp); 408 PGRP_LOCK(savepgrp); 409 PROC_LOCK(p); 410 LIST_REMOVE(p, p_pglist); 411 p->p_pgrp = pgrp; 412 PROC_UNLOCK(p); 413 LIST_INSERT_HEAD(&pgrp->pg_members, p, p_pglist); 414 PGRP_UNLOCK(savepgrp); 415 PGRP_UNLOCK(pgrp); 416 if (LIST_EMPTY(&savepgrp->pg_members)) 417 pgdelete(savepgrp); 418 } 419 420 /* 421 * remove process from process group 422 */ 423 int 424 leavepgrp(p) 425 register struct proc *p; 426 { 427 struct pgrp *savepgrp; 428 429 sx_assert(&proctree_lock, SX_XLOCKED); 430 savepgrp = p->p_pgrp; 431 PGRP_LOCK(savepgrp); 432 PROC_LOCK(p); 433 LIST_REMOVE(p, p_pglist); 434 p->p_pgrp = NULL; 435 PROC_UNLOCK(p); 436 PGRP_UNLOCK(savepgrp); 437 if (LIST_EMPTY(&savepgrp->pg_members)) 438 pgdelete(savepgrp); 439 return (0); 440 } 441 442 /* 443 * delete a process group 444 */ 445 static void 446 pgdelete(pgrp) 447 register struct pgrp *pgrp; 448 { 449 struct session *savesess; 450 451 sx_assert(&proctree_lock, SX_XLOCKED); 452 PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED); 453 SESS_LOCK_ASSERT(pgrp->pg_session, MA_NOTOWNED); 454 455 /* 456 * Reset any sigio structures pointing to us as a result of 457 * F_SETOWN with our pgid. 458 */ 459 funsetownlst(&pgrp->pg_sigiolst); 460 461 PGRP_LOCK(pgrp); 462 if (pgrp->pg_session->s_ttyp != NULL && 463 pgrp->pg_session->s_ttyp->t_pgrp == pgrp) 464 pgrp->pg_session->s_ttyp->t_pgrp = NULL; 465 LIST_REMOVE(pgrp, pg_hash); 466 savesess = pgrp->pg_session; 467 SESS_LOCK(savesess); 468 savesess->s_count--; 469 SESS_UNLOCK(savesess); 470 PGRP_UNLOCK(pgrp); 471 if (savesess->s_count == 0) { 472 mtx_destroy(&savesess->s_mtx); 473 FREE(pgrp->pg_session, M_SESSION); 474 } 475 mtx_destroy(&pgrp->pg_mtx); 476 FREE(pgrp, M_PGRP); 477 } 478 479 static void 480 pgadjustjobc(pgrp, entering) 481 struct pgrp *pgrp; 482 int entering; 483 { 484 485 PGRP_LOCK(pgrp); 486 if (entering) 487 pgrp->pg_jobc++; 488 else { 489 --pgrp->pg_jobc; 490 if (pgrp->pg_jobc == 0) 491 orphanpg(pgrp); 492 } 493 PGRP_UNLOCK(pgrp); 494 } 495 496 /* 497 * Adjust pgrp jobc counters when specified process changes process group. 498 * We count the number of processes in each process group that "qualify" 499 * the group for terminal job control (those with a parent in a different 500 * process group of the same session). If that count reaches zero, the 501 * process group becomes orphaned. Check both the specified process' 502 * process group and that of its children. 503 * entering == 0 => p is leaving specified group. 504 * entering == 1 => p is entering specified group. 505 */ 506 void 507 fixjobc(p, pgrp, entering) 508 register struct proc *p; 509 register struct pgrp *pgrp; 510 int entering; 511 { 512 register struct pgrp *hispgrp; 513 register struct session *mysession; 514 515 sx_assert(&proctree_lock, SX_LOCKED); 516 PROC_LOCK_ASSERT(p, MA_NOTOWNED); 517 PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED); 518 SESS_LOCK_ASSERT(pgrp->pg_session, MA_NOTOWNED); 519 520 /* 521 * Check p's parent to see whether p qualifies its own process 522 * group; if so, adjust count for p's process group. 523 */ 524 mysession = pgrp->pg_session; 525 if ((hispgrp = p->p_pptr->p_pgrp) != pgrp && 526 hispgrp->pg_session == mysession) 527 pgadjustjobc(pgrp, entering); 528 529 /* 530 * Check this process' children to see whether they qualify 531 * their process groups; if so, adjust counts for children's 532 * process groups. 533 */ 534 LIST_FOREACH(p, &p->p_children, p_sibling) { 535 hispgrp = p->p_pgrp; 536 if (hispgrp == pgrp || 537 hispgrp->pg_session != mysession) 538 continue; 539 PROC_LOCK(p); 540 if (p->p_state == PRS_ZOMBIE) { 541 PROC_UNLOCK(p); 542 continue; 543 } 544 PROC_UNLOCK(p); 545 pgadjustjobc(hispgrp, entering); 546 } 547 } 548 549 /* 550 * A process group has become orphaned; 551 * if there are any stopped processes in the group, 552 * hang-up all process in that group. 553 */ 554 static void 555 orphanpg(pg) 556 struct pgrp *pg; 557 { 558 register struct proc *p; 559 560 PGRP_LOCK_ASSERT(pg, MA_OWNED); 561 562 LIST_FOREACH(p, &pg->pg_members, p_pglist) { 563 PROC_LOCK(p); 564 if (P_SHOULDSTOP(p)) { 565 PROC_UNLOCK(p); 566 LIST_FOREACH(p, &pg->pg_members, p_pglist) { 567 PROC_LOCK(p); 568 psignal(p, SIGHUP); 569 psignal(p, SIGCONT); 570 PROC_UNLOCK(p); 571 } 572 return; 573 } 574 PROC_UNLOCK(p); 575 } 576 } 577 578 #include "opt_ddb.h" 579 #ifdef DDB 580 #include <ddb/ddb.h> 581 582 DB_SHOW_COMMAND(pgrpdump, pgrpdump) 583 { 584 register struct pgrp *pgrp; 585 register struct proc *p; 586 register int i; 587 588 for (i = 0; i <= pgrphash; i++) { 589 if (!LIST_EMPTY(&pgrphashtbl[i])) { 590 printf("\tindx %d\n", i); 591 LIST_FOREACH(pgrp, &pgrphashtbl[i], pg_hash) { 592 printf( 593 "\tpgrp %p, pgid %ld, sess %p, sesscnt %d, mem %p\n", 594 (void *)pgrp, (long)pgrp->pg_id, 595 (void *)pgrp->pg_session, 596 pgrp->pg_session->s_count, 597 (void *)LIST_FIRST(&pgrp->pg_members)); 598 LIST_FOREACH(p, &pgrp->pg_members, p_pglist) { 599 printf("\t\tpid %ld addr %p pgrp %p\n", 600 (long)p->p_pid, (void *)p, 601 (void *)p->p_pgrp); 602 } 603 } 604 } 605 } 606 } 607 #endif /* DDB */ 608 void 609 fill_kinfo_thread(struct thread *td, struct kinfo_proc *kp); 610 611 /* 612 * Fill in a kinfo_proc structure for the specified process. 613 * Must be called with the target process locked. 614 */ 615 void 616 fill_kinfo_proc(struct proc *p, struct kinfo_proc *kp) 617 { 618 fill_kinfo_thread(FIRST_THREAD_IN_PROC(p), kp); 619 } 620 621 void 622 fill_kinfo_thread(struct thread *td, struct kinfo_proc *kp) 623 { 624 struct proc *p; 625 struct thread *td0; 626 struct kse *ke; 627 struct ksegrp *kg; 628 struct tty *tp; 629 struct session *sp; 630 struct timeval tv; 631 struct sigacts *ps; 632 633 p = td->td_proc; 634 635 bzero(kp, sizeof(*kp)); 636 637 kp->ki_structsize = sizeof(*kp); 638 kp->ki_paddr = p; 639 PROC_LOCK_ASSERT(p, MA_OWNED); 640 kp->ki_addr =/* p->p_addr; */0; /* XXXKSE */ 641 kp->ki_args = p->p_args; 642 kp->ki_textvp = p->p_textvp; 643 #ifdef KTRACE 644 kp->ki_tracep = p->p_tracevp; 645 mtx_lock(&ktrace_mtx); 646 kp->ki_traceflag = p->p_traceflag; 647 mtx_unlock(&ktrace_mtx); 648 #endif 649 kp->ki_fd = p->p_fd; 650 kp->ki_vmspace = p->p_vmspace; 651 if (p->p_ucred) { 652 kp->ki_uid = p->p_ucred->cr_uid; 653 kp->ki_ruid = p->p_ucred->cr_ruid; 654 kp->ki_svuid = p->p_ucred->cr_svuid; 655 /* XXX bde doesn't like KI_NGROUPS */ 656 kp->ki_ngroups = min(p->p_ucred->cr_ngroups, KI_NGROUPS); 657 bcopy(p->p_ucred->cr_groups, kp->ki_groups, 658 kp->ki_ngroups * sizeof(gid_t)); 659 kp->ki_rgid = p->p_ucred->cr_rgid; 660 kp->ki_svgid = p->p_ucred->cr_svgid; 661 } 662 if (p->p_sigacts) { 663 ps = p->p_sigacts; 664 mtx_lock(&ps->ps_mtx); 665 kp->ki_sigignore = ps->ps_sigignore; 666 kp->ki_sigcatch = ps->ps_sigcatch; 667 mtx_unlock(&ps->ps_mtx); 668 } 669 mtx_lock_spin(&sched_lock); 670 if (p->p_state != PRS_NEW && 671 p->p_state != PRS_ZOMBIE && 672 p->p_vmspace != NULL) { 673 struct vmspace *vm = p->p_vmspace; 674 675 kp->ki_size = vm->vm_map.size; 676 kp->ki_rssize = vmspace_resident_count(vm); /*XXX*/ 677 if (p->p_sflag & PS_INMEM) 678 kp->ki_rssize += UAREA_PAGES; 679 FOREACH_THREAD_IN_PROC(p, td0) { 680 if (!TD_IS_SWAPPED(td0)) 681 kp->ki_rssize += td0->td_kstack_pages; 682 if (td0->td_altkstack_obj != NULL) 683 kp->ki_rssize += td0->td_altkstack_pages; 684 } 685 kp->ki_swrss = vm->vm_swrss; 686 kp->ki_tsize = vm->vm_tsize; 687 kp->ki_dsize = vm->vm_dsize; 688 kp->ki_ssize = vm->vm_ssize; 689 } 690 if ((p->p_sflag & PS_INMEM) && p->p_stats) { 691 kp->ki_start = p->p_stats->p_start; 692 timevaladd(&kp->ki_start, &boottime); 693 kp->ki_rusage = p->p_stats->p_ru; 694 kp->ki_childtime.tv_sec = p->p_stats->p_cru.ru_utime.tv_sec + 695 p->p_stats->p_cru.ru_stime.tv_sec; 696 kp->ki_childtime.tv_usec = p->p_stats->p_cru.ru_utime.tv_usec + 697 p->p_stats->p_cru.ru_stime.tv_usec; 698 } 699 if (p->p_state != PRS_ZOMBIE) { 700 #if 0 701 if (td == NULL) { 702 /* XXXKSE: This should never happen. */ 703 printf("fill_kinfo_proc(): pid %d has no threads!\n", 704 p->p_pid); 705 mtx_unlock_spin(&sched_lock); 706 return; 707 } 708 #endif 709 if (td->td_wmesg != NULL) { 710 strlcpy(kp->ki_wmesg, td->td_wmesg, 711 sizeof(kp->ki_wmesg)); 712 } 713 if (TD_ON_LOCK(td)) { 714 kp->ki_kiflag |= KI_LOCKBLOCK; 715 strlcpy(kp->ki_lockname, td->td_lockname, 716 sizeof(kp->ki_lockname)); 717 } 718 719 if (p->p_state == PRS_NORMAL) { /* XXXKSE very approximate */ 720 if (TD_ON_RUNQ(td) || 721 TD_CAN_RUN(td) || 722 TD_IS_RUNNING(td)) { 723 kp->ki_stat = SRUN; 724 } else if (P_SHOULDSTOP(p)) { 725 kp->ki_stat = SSTOP; 726 } else if (TD_IS_SLEEPING(td)) { 727 kp->ki_stat = SSLEEP; 728 } else if (TD_ON_LOCK(td)) { 729 kp->ki_stat = SLOCK; 730 } else { 731 kp->ki_stat = SWAIT; 732 } 733 } else { 734 kp->ki_stat = SIDL; 735 } 736 737 kp->ki_sflag = p->p_sflag; 738 kp->ki_swtime = p->p_swtime; 739 kp->ki_pid = p->p_pid; 740 kg = td->td_ksegrp; 741 ke = td->td_kse; 742 bintime2timeval(&p->p_runtime, &tv); 743 kp->ki_runtime = 744 tv.tv_sec * (u_int64_t)1000000 + tv.tv_usec; 745 746 /* things in the KSE GROUP */ 747 kp->ki_estcpu = kg->kg_estcpu; 748 kp->ki_slptime = kg->kg_slptime; 749 kp->ki_pri.pri_user = kg->kg_user_pri; 750 kp->ki_pri.pri_class = kg->kg_pri_class; 751 kp->ki_nice = kg->kg_nice; 752 753 /* Things in the thread */ 754 kp->ki_wchan = td->td_wchan; 755 kp->ki_pri.pri_level = td->td_priority; 756 kp->ki_pri.pri_native = td->td_base_pri; 757 kp->ki_lastcpu = td->td_lastcpu; 758 kp->ki_oncpu = td->td_oncpu; 759 kp->ki_tdflags = td->td_flags; 760 kp->ki_pcb = td->td_pcb; 761 kp->ki_kstack = (void *)td->td_kstack; 762 kp->ki_pctcpu = sched_pctcpu(td); 763 764 /* Things in the kse */ 765 if (ke) 766 kp->ki_rqindex = ke->ke_rqindex; 767 else 768 kp->ki_rqindex = 0; 769 770 } else { 771 kp->ki_stat = SZOMB; 772 } 773 mtx_unlock_spin(&sched_lock); 774 sp = NULL; 775 tp = NULL; 776 if (p->p_pgrp) { 777 kp->ki_pgid = p->p_pgrp->pg_id; 778 kp->ki_jobc = p->p_pgrp->pg_jobc; 779 sp = p->p_pgrp->pg_session; 780 781 if (sp != NULL) { 782 kp->ki_sid = sp->s_sid; 783 SESS_LOCK(sp); 784 strlcpy(kp->ki_login, sp->s_login, 785 sizeof(kp->ki_login)); 786 if (sp->s_ttyvp) 787 kp->ki_kiflag |= KI_CTTY; 788 if (SESS_LEADER(p)) 789 kp->ki_kiflag |= KI_SLEADER; 790 tp = sp->s_ttyp; 791 SESS_UNLOCK(sp); 792 } 793 } 794 if ((p->p_flag & P_CONTROLT) && tp != NULL) { 795 kp->ki_tdev = dev2udev(tp->t_dev); 796 kp->ki_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 797 if (tp->t_session) 798 kp->ki_tsid = tp->t_session->s_sid; 799 } else 800 kp->ki_tdev = NOUDEV; 801 if (p->p_comm[0] != '\0') { 802 strlcpy(kp->ki_comm, p->p_comm, sizeof(kp->ki_comm)); 803 strlcpy(kp->ki_ocomm, p->p_comm, sizeof(kp->ki_ocomm)); 804 } 805 kp->ki_siglist = p->p_siglist; 806 SIGSETOR(kp->ki_siglist, td->td_siglist); 807 kp->ki_sigmask = td->td_sigmask; 808 kp->ki_xstat = p->p_xstat; 809 kp->ki_acflag = p->p_acflag; 810 kp->ki_flag = p->p_flag; 811 /* If jailed(p->p_ucred), emulate the old P_JAILED flag. */ 812 if (jailed(p->p_ucred)) 813 kp->ki_flag |= P_JAILED; 814 kp->ki_lock = p->p_lock; 815 if (p->p_pptr) 816 kp->ki_ppid = p->p_pptr->p_pid; 817 } 818 819 /* 820 * Locate a zombie process by number 821 */ 822 struct proc * 823 zpfind(pid_t pid) 824 { 825 struct proc *p; 826 827 sx_slock(&allproc_lock); 828 LIST_FOREACH(p, &zombproc, p_list) 829 if (p->p_pid == pid) { 830 PROC_LOCK(p); 831 break; 832 } 833 sx_sunlock(&allproc_lock); 834 return (p); 835 } 836 837 #define KERN_PROC_ZOMBMASK 0x3 838 #define KERN_PROC_NOTHREADS 0x4 839 840 /* 841 * Must be called with the process locked and will return with it unlocked. 842 */ 843 static int 844 sysctl_out_proc(struct proc *p, struct sysctl_req *req, int flags) 845 { 846 struct thread *td; 847 struct kinfo_proc kinfo_proc; 848 int error = 0; 849 struct proc *np; 850 pid_t pid = p->p_pid; 851 852 PROC_LOCK_ASSERT(p, MA_OWNED); 853 854 if (flags & KERN_PROC_NOTHREADS) { 855 fill_kinfo_proc(p, &kinfo_proc); 856 PROC_UNLOCK(p); 857 error = SYSCTL_OUT(req, (caddr_t)&kinfo_proc, 858 sizeof(kinfo_proc)); 859 PROC_LOCK(p); 860 } else { 861 _PHOLD(p); 862 FOREACH_THREAD_IN_PROC(p, td) { 863 fill_kinfo_thread(td, &kinfo_proc); 864 PROC_UNLOCK(p); 865 error = SYSCTL_OUT(req, (caddr_t)&kinfo_proc, 866 sizeof(kinfo_proc)); 867 PROC_LOCK(p); 868 if (error) 869 break; 870 } 871 _PRELE(p); 872 } 873 PROC_UNLOCK(p); 874 if (error) 875 return (error); 876 if (flags & KERN_PROC_ZOMBMASK) 877 np = zpfind(pid); 878 else { 879 if (pid == 0) 880 return (0); 881 np = pfind(pid); 882 } 883 if (np == NULL) 884 return EAGAIN; 885 if (np != p) { 886 PROC_UNLOCK(np); 887 return EAGAIN; 888 } 889 PROC_UNLOCK(np); 890 return (0); 891 } 892 893 static int 894 sysctl_kern_proc(SYSCTL_HANDLER_ARGS) 895 { 896 int *name = (int*) arg1; 897 u_int namelen = arg2; 898 struct proc *p; 899 int flags, doingzomb, oid_number; 900 int error = 0; 901 902 oid_number = oidp->oid_number; 903 if (oid_number != KERN_PROC_ALL && 904 (oid_number & KERN_PROC_INC_THREAD) == 0) 905 flags = KERN_PROC_NOTHREADS; 906 else { 907 flags = 0; 908 oid_number &= ~KERN_PROC_INC_THREAD; 909 } 910 if (oid_number == KERN_PROC_PID) { 911 if (namelen != 1) 912 return (EINVAL); 913 p = pfind((pid_t)name[0]); 914 if (!p) 915 return (ESRCH); 916 if ((error = p_cansee(curthread, p))) { 917 PROC_UNLOCK(p); 918 return (error); 919 } 920 error = sysctl_out_proc(p, req, flags); 921 return (error); 922 } 923 924 switch (oid_number) { 925 case KERN_PROC_ALL: 926 if (namelen != 0) 927 return (EINVAL); 928 break; 929 case KERN_PROC_PROC: 930 if (namelen != 0 && namelen != 1) 931 return (EINVAL); 932 break; 933 default: 934 if (namelen != 1) 935 return (EINVAL); 936 break; 937 } 938 939 if (!req->oldptr) { 940 /* overestimate by 5 procs */ 941 error = SYSCTL_OUT(req, 0, sizeof (struct kinfo_proc) * 5); 942 if (error) 943 return (error); 944 } 945 error = sysctl_wire_old_buffer(req, 0); 946 if (error != 0) 947 return (error); 948 sx_slock(&allproc_lock); 949 for (doingzomb=0 ; doingzomb < 2 ; doingzomb++) { 950 if (!doingzomb) 951 p = LIST_FIRST(&allproc); 952 else 953 p = LIST_FIRST(&zombproc); 954 for (; p != 0; p = LIST_NEXT(p, p_list)) { 955 /* 956 * Skip embryonic processes. 957 */ 958 mtx_lock_spin(&sched_lock); 959 if (p->p_state == PRS_NEW) { 960 mtx_unlock_spin(&sched_lock); 961 continue; 962 } 963 mtx_unlock_spin(&sched_lock); 964 PROC_LOCK(p); 965 /* 966 * Show a user only appropriate processes. 967 */ 968 if (p_cansee(curthread, p)) { 969 PROC_UNLOCK(p); 970 continue; 971 } 972 /* 973 * TODO - make more efficient (see notes below). 974 * do by session. 975 */ 976 switch (oid_number) { 977 978 case KERN_PROC_PGRP: 979 /* could do this by traversing pgrp */ 980 if (p->p_pgrp == NULL || 981 p->p_pgrp->pg_id != (pid_t)name[0]) { 982 PROC_UNLOCK(p); 983 continue; 984 } 985 break; 986 987 case KERN_PROC_RGID: 988 if (p->p_ucred == NULL || 989 p->p_ucred->cr_rgid != (gid_t)name[0]) { 990 PROC_UNLOCK(p); 991 continue; 992 } 993 break; 994 995 case KERN_PROC_SESSION: 996 if (p->p_session == NULL || 997 p->p_session->s_sid != (pid_t)name[0]) { 998 PROC_UNLOCK(p); 999 continue; 1000 } 1001 break; 1002 1003 case KERN_PROC_TTY: 1004 if ((p->p_flag & P_CONTROLT) == 0 || 1005 p->p_session == NULL) { 1006 PROC_UNLOCK(p); 1007 continue; 1008 } 1009 SESS_LOCK(p->p_session); 1010 if (p->p_session->s_ttyp == NULL || 1011 dev2udev(p->p_session->s_ttyp->t_dev) != 1012 (udev_t)name[0]) { 1013 SESS_UNLOCK(p->p_session); 1014 PROC_UNLOCK(p); 1015 continue; 1016 } 1017 SESS_UNLOCK(p->p_session); 1018 break; 1019 1020 case KERN_PROC_UID: 1021 if (p->p_ucred == NULL || 1022 p->p_ucred->cr_uid != (uid_t)name[0]) { 1023 PROC_UNLOCK(p); 1024 continue; 1025 } 1026 break; 1027 1028 case KERN_PROC_RUID: 1029 if (p->p_ucred == NULL || 1030 p->p_ucred->cr_ruid != (uid_t)name[0]) { 1031 PROC_UNLOCK(p); 1032 continue; 1033 } 1034 break; 1035 1036 case KERN_PROC_PROC: 1037 break; 1038 1039 default: 1040 break; 1041 1042 } 1043 1044 error = sysctl_out_proc(p, req, flags | doingzomb); 1045 if (error) { 1046 sx_sunlock(&allproc_lock); 1047 return (error); 1048 } 1049 } 1050 } 1051 sx_sunlock(&allproc_lock); 1052 return (0); 1053 } 1054 1055 struct pargs * 1056 pargs_alloc(int len) 1057 { 1058 struct pargs *pa; 1059 1060 MALLOC(pa, struct pargs *, sizeof(struct pargs) + len, M_PARGS, 1061 M_WAITOK); 1062 pa->ar_ref = 1; 1063 pa->ar_length = len; 1064 return (pa); 1065 } 1066 1067 void 1068 pargs_free(struct pargs *pa) 1069 { 1070 1071 FREE(pa, M_PARGS); 1072 } 1073 1074 void 1075 pargs_hold(struct pargs *pa) 1076 { 1077 1078 if (pa == NULL) 1079 return; 1080 PARGS_LOCK(pa); 1081 pa->ar_ref++; 1082 PARGS_UNLOCK(pa); 1083 } 1084 1085 void 1086 pargs_drop(struct pargs *pa) 1087 { 1088 1089 if (pa == NULL) 1090 return; 1091 PARGS_LOCK(pa); 1092 if (--pa->ar_ref == 0) { 1093 PARGS_UNLOCK(pa); 1094 pargs_free(pa); 1095 } else 1096 PARGS_UNLOCK(pa); 1097 } 1098 1099 /* 1100 * This sysctl allows a process to retrieve the argument list or process 1101 * title for another process without groping around in the address space 1102 * of the other process. It also allow a process to set its own "process 1103 * title to a string of its own choice. 1104 */ 1105 static int 1106 sysctl_kern_proc_args(SYSCTL_HANDLER_ARGS) 1107 { 1108 int *name = (int*) arg1; 1109 u_int namelen = arg2; 1110 struct pargs *newpa, *pa; 1111 struct proc *p; 1112 int error = 0; 1113 1114 if (namelen != 1) 1115 return (EINVAL); 1116 1117 p = pfind((pid_t)name[0]); 1118 if (!p) 1119 return (ESRCH); 1120 1121 if ((error = p_cansee(curthread, p)) != 0) { 1122 PROC_UNLOCK(p); 1123 return (error); 1124 } 1125 1126 if (req->newptr && curproc != p) { 1127 PROC_UNLOCK(p); 1128 return (EPERM); 1129 } 1130 1131 pa = p->p_args; 1132 pargs_hold(pa); 1133 PROC_UNLOCK(p); 1134 if (req->oldptr != NULL && pa != NULL) 1135 error = SYSCTL_OUT(req, pa->ar_args, pa->ar_length); 1136 pargs_drop(pa); 1137 if (error != 0 || req->newptr == NULL) 1138 return (error); 1139 1140 if (req->newlen + sizeof(struct pargs) > ps_arg_cache_limit) 1141 return (ENOMEM); 1142 newpa = pargs_alloc(req->newlen); 1143 error = SYSCTL_IN(req, newpa->ar_args, req->newlen); 1144 if (error != 0) { 1145 pargs_free(newpa); 1146 return (error); 1147 } 1148 PROC_LOCK(p); 1149 pa = p->p_args; 1150 p->p_args = newpa; 1151 PROC_UNLOCK(p); 1152 pargs_drop(pa); 1153 return (0); 1154 } 1155 1156 static int 1157 sysctl_kern_proc_sv_name(SYSCTL_HANDLER_ARGS) 1158 { 1159 struct proc *p; 1160 char *sv_name; 1161 int *name; 1162 int namelen; 1163 int error; 1164 1165 namelen = arg2; 1166 if (namelen != 1) 1167 return (EINVAL); 1168 1169 name = (int *)arg1; 1170 if ((p = pfind((pid_t)name[0])) == NULL) 1171 return (ESRCH); 1172 if ((error = p_cansee(curthread, p))) { 1173 PROC_UNLOCK(p); 1174 return (error); 1175 } 1176 sv_name = p->p_sysent->sv_name; 1177 PROC_UNLOCK(p); 1178 return (sysctl_handle_string(oidp, sv_name, 0, req)); 1179 } 1180 1181 1182 SYSCTL_NODE(_kern, KERN_PROC, proc, CTLFLAG_RD, 0, "Process table"); 1183 1184 SYSCTL_PROC(_kern_proc, KERN_PROC_ALL, all, CTLFLAG_RD|CTLTYPE_STRUCT, 1185 0, 0, sysctl_kern_proc, "S,proc", "Return entire process table"); 1186 1187 SYSCTL_NODE(_kern_proc, KERN_PROC_PGRP, pgrp, CTLFLAG_RD, 1188 sysctl_kern_proc, "Process table"); 1189 1190 SYSCTL_NODE(_kern_proc, KERN_PROC_RGID, rgid, CTLFLAG_RD, 1191 sysctl_kern_proc, "Process table"); 1192 1193 SYSCTL_NODE(_kern_proc, KERN_PROC_SESSION, sid, CTLFLAG_RD, 1194 sysctl_kern_proc, "Process table"); 1195 1196 SYSCTL_NODE(_kern_proc, KERN_PROC_TTY, tty, CTLFLAG_RD, 1197 sysctl_kern_proc, "Process table"); 1198 1199 SYSCTL_NODE(_kern_proc, KERN_PROC_UID, uid, CTLFLAG_RD, 1200 sysctl_kern_proc, "Process table"); 1201 1202 SYSCTL_NODE(_kern_proc, KERN_PROC_RUID, ruid, CTLFLAG_RD, 1203 sysctl_kern_proc, "Process table"); 1204 1205 SYSCTL_NODE(_kern_proc, KERN_PROC_PID, pid, CTLFLAG_RD, 1206 sysctl_kern_proc, "Process table"); 1207 1208 SYSCTL_NODE(_kern_proc, KERN_PROC_PROC, proc, CTLFLAG_RD, 1209 sysctl_kern_proc, "Return process table, no threads"); 1210 1211 SYSCTL_NODE(_kern_proc, KERN_PROC_ARGS, args, CTLFLAG_RW | CTLFLAG_ANYBODY, 1212 sysctl_kern_proc_args, "Process argument list"); 1213 1214 SYSCTL_NODE(_kern_proc, KERN_PROC_SV_NAME, sv_name, CTLFLAG_RD, 1215 sysctl_kern_proc_sv_name, "Process syscall vector name (ABI type)"); 1216 1217 SYSCTL_NODE(_kern_proc, (KERN_PROC_PGRP | KERN_PROC_INC_THREAD), pgrp_td, 1218 CTLFLAG_RD, sysctl_kern_proc, "Process table"); 1219 1220 SYSCTL_NODE(_kern_proc, (KERN_PROC_RGID | KERN_PROC_INC_THREAD), rgid_td, 1221 CTLFLAG_RD, sysctl_kern_proc, "Process table"); 1222 1223 SYSCTL_NODE(_kern_proc, (KERN_PROC_SESSION | KERN_PROC_INC_THREAD), sid_td, 1224 CTLFLAG_RD, sysctl_kern_proc, "Process table"); 1225 1226 SYSCTL_NODE(_kern_proc, (KERN_PROC_TTY | KERN_PROC_INC_THREAD), tty_td, 1227 CTLFLAG_RD, sysctl_kern_proc, "Process table"); 1228 1229 SYSCTL_NODE(_kern_proc, (KERN_PROC_UID | KERN_PROC_INC_THREAD), uid_td, 1230 CTLFLAG_RD, sysctl_kern_proc, "Process table"); 1231 1232 SYSCTL_NODE(_kern_proc, (KERN_PROC_RUID | KERN_PROC_INC_THREAD), ruid_td, 1233 CTLFLAG_RD, sysctl_kern_proc, "Process table"); 1234 1235 SYSCTL_NODE(_kern_proc, (KERN_PROC_PID | KERN_PROC_INC_THREAD), pid_td, 1236 CTLFLAG_RD, sysctl_kern_proc, "Process table"); 1237 1238 SYSCTL_NODE(_kern_proc, (KERN_PROC_PROC | KERN_PROC_INC_THREAD), proc_td, 1239 CTLFLAG_RD, sysctl_kern_proc, "Return process table, no threads"); 1240