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/limits.h> 46 #include <sys/lock.h> 47 #include <sys/loginclass.h> 48 #include <sys/malloc.h> 49 #include <sys/mount.h> 50 #include <sys/mutex.h> 51 #include <sys/proc.h> 52 #include <sys/refcount.h> 53 #include <sys/sbuf.h> 54 #include <sys/sysent.h> 55 #include <sys/sched.h> 56 #include <sys/smp.h> 57 #include <sys/stack.h> 58 #include <sys/sysctl.h> 59 #include <sys/filedesc.h> 60 #include <sys/tty.h> 61 #include <sys/signalvar.h> 62 #include <sys/sdt.h> 63 #include <sys/sx.h> 64 #include <sys/user.h> 65 #include <sys/jail.h> 66 #include <sys/vnode.h> 67 #include <sys/eventhandler.h> 68 69 #ifdef DDB 70 #include <ddb/ddb.h> 71 #endif 72 73 #include <vm/vm.h> 74 #include <vm/vm_extern.h> 75 #include <vm/pmap.h> 76 #include <vm/vm_map.h> 77 #include <vm/vm_object.h> 78 #include <vm/uma.h> 79 80 #ifdef COMPAT_FREEBSD32 81 #include <compat/freebsd32/freebsd32.h> 82 #include <compat/freebsd32/freebsd32_util.h> 83 #endif 84 85 SDT_PROVIDER_DEFINE(proc); 86 SDT_PROBE_DEFINE(proc, kernel, ctor, entry, entry); 87 SDT_PROBE_ARGTYPE(proc, kernel, ctor, entry, 0, "struct proc *"); 88 SDT_PROBE_ARGTYPE(proc, kernel, ctor, entry, 1, "int"); 89 SDT_PROBE_ARGTYPE(proc, kernel, ctor, entry, 2, "void *"); 90 SDT_PROBE_ARGTYPE(proc, kernel, ctor, entry, 3, "int"); 91 SDT_PROBE_DEFINE(proc, kernel, ctor, return, return); 92 SDT_PROBE_ARGTYPE(proc, kernel, ctor, return, 0, "struct proc *"); 93 SDT_PROBE_ARGTYPE(proc, kernel, ctor, return, 1, "int"); 94 SDT_PROBE_ARGTYPE(proc, kernel, ctor, return, 2, "void *"); 95 SDT_PROBE_ARGTYPE(proc, kernel, ctor, return, 3, "int"); 96 SDT_PROBE_DEFINE(proc, kernel, dtor, entry, entry); 97 SDT_PROBE_ARGTYPE(proc, kernel, dtor, entry, 0, "struct proc *"); 98 SDT_PROBE_ARGTYPE(proc, kernel, dtor, entry, 1, "int"); 99 SDT_PROBE_ARGTYPE(proc, kernel, dtor, entry, 2, "void *"); 100 SDT_PROBE_ARGTYPE(proc, kernel, dtor, entry, 3, "struct thread *"); 101 SDT_PROBE_DEFINE(proc, kernel, dtor, return, return); 102 SDT_PROBE_ARGTYPE(proc, kernel, dtor, return, 0, "struct proc *"); 103 SDT_PROBE_ARGTYPE(proc, kernel, dtor, return, 1, "int"); 104 SDT_PROBE_ARGTYPE(proc, kernel, dtor, return, 2, "void *"); 105 SDT_PROBE_DEFINE(proc, kernel, init, entry, entry); 106 SDT_PROBE_ARGTYPE(proc, kernel, init, entry, 0, "struct proc *"); 107 SDT_PROBE_ARGTYPE(proc, kernel, init, entry, 1, "int"); 108 SDT_PROBE_ARGTYPE(proc, kernel, init, entry, 2, "int"); 109 SDT_PROBE_DEFINE(proc, kernel, init, return, return); 110 SDT_PROBE_ARGTYPE(proc, kernel, init, return, 0, "struct proc *"); 111 SDT_PROBE_ARGTYPE(proc, kernel, init, return, 1, "int"); 112 SDT_PROBE_ARGTYPE(proc, kernel, init, return, 2, "int"); 113 114 MALLOC_DEFINE(M_PGRP, "pgrp", "process group header"); 115 MALLOC_DEFINE(M_SESSION, "session", "session header"); 116 static MALLOC_DEFINE(M_PROC, "proc", "Proc structures"); 117 MALLOC_DEFINE(M_SUBPROC, "subproc", "Proc sub-structures"); 118 119 static void doenterpgrp(struct proc *, struct pgrp *); 120 static void orphanpg(struct pgrp *pg); 121 static void fill_kinfo_aggregate(struct proc *p, struct kinfo_proc *kp); 122 static void fill_kinfo_proc_only(struct proc *p, struct kinfo_proc *kp); 123 static void fill_kinfo_thread(struct thread *td, struct kinfo_proc *kp, 124 int preferthread); 125 static void pgadjustjobc(struct pgrp *pgrp, int entering); 126 static void pgdelete(struct pgrp *); 127 static int proc_ctor(void *mem, int size, void *arg, int flags); 128 static void proc_dtor(void *mem, int size, void *arg); 129 static int proc_init(void *mem, int size, int flags); 130 static void proc_fini(void *mem, int size); 131 static void pargs_free(struct pargs *pa); 132 133 /* 134 * Other process lists 135 */ 136 struct pidhashhead *pidhashtbl; 137 u_long pidhash; 138 struct pgrphashhead *pgrphashtbl; 139 u_long pgrphash; 140 struct proclist allproc; 141 struct proclist zombproc; 142 struct sx allproc_lock; 143 struct sx proctree_lock; 144 struct mtx ppeers_lock; 145 uma_zone_t proc_zone; 146 147 int kstack_pages = KSTACK_PAGES; 148 SYSCTL_INT(_kern, OID_AUTO, kstack_pages, CTLFLAG_RD, &kstack_pages, 0, 149 "Kernel stack size in pages"); 150 151 CTASSERT(sizeof(struct kinfo_proc) == KINFO_PROC_SIZE); 152 #ifdef COMPAT_FREEBSD32 153 CTASSERT(sizeof(struct kinfo_proc32) == KINFO_PROC32_SIZE); 154 #endif 155 156 /* 157 * Initialize global process hashing structures. 158 */ 159 void 160 procinit() 161 { 162 163 sx_init(&allproc_lock, "allproc"); 164 sx_init(&proctree_lock, "proctree"); 165 mtx_init(&ppeers_lock, "p_peers", NULL, MTX_DEF); 166 LIST_INIT(&allproc); 167 LIST_INIT(&zombproc); 168 pidhashtbl = hashinit(maxproc / 4, M_PROC, &pidhash); 169 pgrphashtbl = hashinit(maxproc / 4, M_PROC, &pgrphash); 170 proc_zone = uma_zcreate("PROC", sched_sizeof_proc(), 171 proc_ctor, proc_dtor, proc_init, proc_fini, 172 UMA_ALIGN_PTR, UMA_ZONE_NOFREE); 173 uihashinit(); 174 } 175 176 /* 177 * Prepare a proc for use. 178 */ 179 static int 180 proc_ctor(void *mem, int size, void *arg, int flags) 181 { 182 struct proc *p; 183 184 p = (struct proc *)mem; 185 SDT_PROBE(proc, kernel, ctor , entry, p, size, arg, flags, 0); 186 EVENTHANDLER_INVOKE(process_ctor, p); 187 SDT_PROBE(proc, kernel, ctor , return, p, size, arg, flags, 0); 188 return (0); 189 } 190 191 /* 192 * Reclaim a proc after use. 193 */ 194 static void 195 proc_dtor(void *mem, int size, void *arg) 196 { 197 struct proc *p; 198 struct thread *td; 199 200 /* INVARIANTS checks go here */ 201 p = (struct proc *)mem; 202 td = FIRST_THREAD_IN_PROC(p); 203 SDT_PROBE(proc, kernel, dtor, entry, p, size, arg, td, 0); 204 if (td != NULL) { 205 #ifdef INVARIANTS 206 KASSERT((p->p_numthreads == 1), 207 ("bad number of threads in exiting process")); 208 KASSERT(STAILQ_EMPTY(&p->p_ktr), ("proc_dtor: non-empty p_ktr")); 209 #endif 210 /* Free all OSD associated to this thread. */ 211 osd_thread_exit(td); 212 } 213 EVENTHANDLER_INVOKE(process_dtor, p); 214 if (p->p_ksi != NULL) 215 KASSERT(! KSI_ONQ(p->p_ksi), ("SIGCHLD queue")); 216 SDT_PROBE(proc, kernel, dtor, return, p, size, arg, 0, 0); 217 } 218 219 /* 220 * Initialize type-stable parts of a proc (when newly created). 221 */ 222 static int 223 proc_init(void *mem, int size, int flags) 224 { 225 struct proc *p; 226 227 p = (struct proc *)mem; 228 SDT_PROBE(proc, kernel, init, entry, p, size, flags, 0, 0); 229 p->p_sched = (struct p_sched *)&p[1]; 230 bzero(&p->p_mtx, sizeof(struct mtx)); 231 mtx_init(&p->p_mtx, "process lock", NULL, MTX_DEF | MTX_DUPOK); 232 mtx_init(&p->p_slock, "process slock", NULL, MTX_SPIN | MTX_RECURSE); 233 cv_init(&p->p_pwait, "ppwait"); 234 cv_init(&p->p_dbgwait, "dbgwait"); 235 TAILQ_INIT(&p->p_threads); /* all threads in proc */ 236 EVENTHANDLER_INVOKE(process_init, p); 237 p->p_stats = pstats_alloc(); 238 SDT_PROBE(proc, kernel, init, return, p, size, flags, 0, 0); 239 return (0); 240 } 241 242 /* 243 * UMA should ensure that this function is never called. 244 * Freeing a proc structure would violate type stability. 245 */ 246 static void 247 proc_fini(void *mem, int size) 248 { 249 #ifdef notnow 250 struct proc *p; 251 252 p = (struct proc *)mem; 253 EVENTHANDLER_INVOKE(process_fini, p); 254 pstats_free(p->p_stats); 255 thread_free(FIRST_THREAD_IN_PROC(p)); 256 mtx_destroy(&p->p_mtx); 257 if (p->p_ksi != NULL) 258 ksiginfo_free(p->p_ksi); 259 #else 260 panic("proc reclaimed"); 261 #endif 262 } 263 264 /* 265 * Is p an inferior of the current process? 266 */ 267 int 268 inferior(p) 269 register struct proc *p; 270 { 271 272 sx_assert(&proctree_lock, SX_LOCKED); 273 for (; p != curproc; p = p->p_pptr) 274 if (p->p_pid == 0) 275 return (0); 276 return (1); 277 } 278 279 /* 280 * Locate a process by number; return only "live" processes -- i.e., neither 281 * zombies nor newly born but incompletely initialized processes. By not 282 * returning processes in the PRS_NEW state, we allow callers to avoid 283 * testing for that condition to avoid dereferencing p_ucred, et al. 284 */ 285 struct proc * 286 pfind(pid) 287 register pid_t pid; 288 { 289 register struct proc *p; 290 291 sx_slock(&allproc_lock); 292 LIST_FOREACH(p, PIDHASH(pid), p_hash) 293 if (p->p_pid == pid) { 294 PROC_LOCK(p); 295 if (p->p_state == PRS_NEW) { 296 PROC_UNLOCK(p); 297 p = NULL; 298 } 299 break; 300 } 301 sx_sunlock(&allproc_lock); 302 return (p); 303 } 304 305 /* 306 * Locate a process group by number. 307 * The caller must hold proctree_lock. 308 */ 309 struct pgrp * 310 pgfind(pgid) 311 register pid_t pgid; 312 { 313 register struct pgrp *pgrp; 314 315 sx_assert(&proctree_lock, SX_LOCKED); 316 317 LIST_FOREACH(pgrp, PGRPHASH(pgid), pg_hash) { 318 if (pgrp->pg_id == pgid) { 319 PGRP_LOCK(pgrp); 320 return (pgrp); 321 } 322 } 323 return (NULL); 324 } 325 326 /* 327 * Create a new process group. 328 * pgid must be equal to the pid of p. 329 * Begin a new session if required. 330 */ 331 int 332 enterpgrp(p, pgid, pgrp, sess) 333 register struct proc *p; 334 pid_t pgid; 335 struct pgrp *pgrp; 336 struct session *sess; 337 { 338 struct pgrp *pgrp2; 339 340 sx_assert(&proctree_lock, SX_XLOCKED); 341 342 KASSERT(pgrp != NULL, ("enterpgrp: pgrp == NULL")); 343 KASSERT(p->p_pid == pgid, 344 ("enterpgrp: new pgrp and pid != pgid")); 345 346 pgrp2 = pgfind(pgid); 347 348 KASSERT(pgrp2 == NULL, 349 ("enterpgrp: pgrp with pgid exists")); 350 KASSERT(!SESS_LEADER(p), 351 ("enterpgrp: session leader attempted setpgrp")); 352 353 mtx_init(&pgrp->pg_mtx, "process group", NULL, MTX_DEF | MTX_DUPOK); 354 355 if (sess != NULL) { 356 /* 357 * new session 358 */ 359 mtx_init(&sess->s_mtx, "session", NULL, MTX_DEF); 360 PROC_LOCK(p); 361 p->p_flag &= ~P_CONTROLT; 362 PROC_UNLOCK(p); 363 PGRP_LOCK(pgrp); 364 sess->s_leader = p; 365 sess->s_sid = p->p_pid; 366 refcount_init(&sess->s_count, 1); 367 sess->s_ttyvp = NULL; 368 sess->s_ttydp = NULL; 369 sess->s_ttyp = NULL; 370 bcopy(p->p_session->s_login, sess->s_login, 371 sizeof(sess->s_login)); 372 pgrp->pg_session = sess; 373 KASSERT(p == curproc, 374 ("enterpgrp: mksession and p != curproc")); 375 } else { 376 pgrp->pg_session = p->p_session; 377 sess_hold(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); 391 392 doenterpgrp(p, pgrp); 393 394 return (0); 395 } 396 397 /* 398 * Move p to an existing process group 399 */ 400 int 401 enterthispgrp(p, pgrp) 402 register struct proc *p; 403 struct pgrp *pgrp; 404 { 405 406 sx_assert(&proctree_lock, SX_XLOCKED); 407 PROC_LOCK_ASSERT(p, MA_NOTOWNED); 408 PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED); 409 PGRP_LOCK_ASSERT(p->p_pgrp, MA_NOTOWNED); 410 SESS_LOCK_ASSERT(p->p_session, MA_NOTOWNED); 411 KASSERT(pgrp->pg_session == p->p_session, 412 ("%s: pgrp's session %p, p->p_session %p.\n", 413 __func__, 414 pgrp->pg_session, 415 p->p_session)); 416 KASSERT(pgrp != p->p_pgrp, 417 ("%s: p belongs to pgrp.", __func__)); 418 419 doenterpgrp(p, pgrp); 420 421 return (0); 422 } 423 424 /* 425 * Move p to a process group 426 */ 427 static void 428 doenterpgrp(p, pgrp) 429 struct proc *p; 430 struct pgrp *pgrp; 431 { 432 struct pgrp *savepgrp; 433 434 sx_assert(&proctree_lock, SX_XLOCKED); 435 PROC_LOCK_ASSERT(p, MA_NOTOWNED); 436 PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED); 437 PGRP_LOCK_ASSERT(p->p_pgrp, MA_NOTOWNED); 438 SESS_LOCK_ASSERT(p->p_session, MA_NOTOWNED); 439 440 savepgrp = p->p_pgrp; 441 442 /* 443 * Adjust eligibility of affected pgrps to participate in job control. 444 * Increment eligibility counts before decrementing, otherwise we 445 * could reach 0 spuriously during the first call. 446 */ 447 fixjobc(p, pgrp, 1); 448 fixjobc(p, p->p_pgrp, 0); 449 450 PGRP_LOCK(pgrp); 451 PGRP_LOCK(savepgrp); 452 PROC_LOCK(p); 453 LIST_REMOVE(p, p_pglist); 454 p->p_pgrp = pgrp; 455 PROC_UNLOCK(p); 456 LIST_INSERT_HEAD(&pgrp->pg_members, p, p_pglist); 457 PGRP_UNLOCK(savepgrp); 458 PGRP_UNLOCK(pgrp); 459 if (LIST_EMPTY(&savepgrp->pg_members)) 460 pgdelete(savepgrp); 461 } 462 463 /* 464 * remove process from process group 465 */ 466 int 467 leavepgrp(p) 468 register struct proc *p; 469 { 470 struct pgrp *savepgrp; 471 472 sx_assert(&proctree_lock, SX_XLOCKED); 473 savepgrp = p->p_pgrp; 474 PGRP_LOCK(savepgrp); 475 PROC_LOCK(p); 476 LIST_REMOVE(p, p_pglist); 477 p->p_pgrp = NULL; 478 PROC_UNLOCK(p); 479 PGRP_UNLOCK(savepgrp); 480 if (LIST_EMPTY(&savepgrp->pg_members)) 481 pgdelete(savepgrp); 482 return (0); 483 } 484 485 /* 486 * delete a process group 487 */ 488 static void 489 pgdelete(pgrp) 490 register struct pgrp *pgrp; 491 { 492 struct session *savesess; 493 struct tty *tp; 494 495 sx_assert(&proctree_lock, SX_XLOCKED); 496 PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED); 497 SESS_LOCK_ASSERT(pgrp->pg_session, MA_NOTOWNED); 498 499 /* 500 * Reset any sigio structures pointing to us as a result of 501 * F_SETOWN with our pgid. 502 */ 503 funsetownlst(&pgrp->pg_sigiolst); 504 505 PGRP_LOCK(pgrp); 506 tp = pgrp->pg_session->s_ttyp; 507 LIST_REMOVE(pgrp, pg_hash); 508 savesess = pgrp->pg_session; 509 PGRP_UNLOCK(pgrp); 510 511 /* Remove the reference to the pgrp before deallocating it. */ 512 if (tp != NULL) { 513 tty_lock(tp); 514 tty_rel_pgrp(tp, pgrp); 515 } 516 517 mtx_destroy(&pgrp->pg_mtx); 518 free(pgrp, M_PGRP); 519 sess_release(savesess); 520 } 521 522 static void 523 pgadjustjobc(pgrp, entering) 524 struct pgrp *pgrp; 525 int entering; 526 { 527 528 PGRP_LOCK(pgrp); 529 if (entering) 530 pgrp->pg_jobc++; 531 else { 532 --pgrp->pg_jobc; 533 if (pgrp->pg_jobc == 0) 534 orphanpg(pgrp); 535 } 536 PGRP_UNLOCK(pgrp); 537 } 538 539 /* 540 * Adjust pgrp jobc counters when specified process changes process group. 541 * We count the number of processes in each process group that "qualify" 542 * the group for terminal job control (those with a parent in a different 543 * process group of the same session). If that count reaches zero, the 544 * process group becomes orphaned. Check both the specified process' 545 * process group and that of its children. 546 * entering == 0 => p is leaving specified group. 547 * entering == 1 => p is entering specified group. 548 */ 549 void 550 fixjobc(p, pgrp, entering) 551 register struct proc *p; 552 register struct pgrp *pgrp; 553 int entering; 554 { 555 register struct pgrp *hispgrp; 556 register struct session *mysession; 557 558 sx_assert(&proctree_lock, SX_LOCKED); 559 PROC_LOCK_ASSERT(p, MA_NOTOWNED); 560 PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED); 561 SESS_LOCK_ASSERT(pgrp->pg_session, MA_NOTOWNED); 562 563 /* 564 * Check p's parent to see whether p qualifies its own process 565 * group; if so, adjust count for p's process group. 566 */ 567 mysession = pgrp->pg_session; 568 if ((hispgrp = p->p_pptr->p_pgrp) != pgrp && 569 hispgrp->pg_session == mysession) 570 pgadjustjobc(pgrp, entering); 571 572 /* 573 * Check this process' children to see whether they qualify 574 * their process groups; if so, adjust counts for children's 575 * process groups. 576 */ 577 LIST_FOREACH(p, &p->p_children, p_sibling) { 578 hispgrp = p->p_pgrp; 579 if (hispgrp == pgrp || 580 hispgrp->pg_session != mysession) 581 continue; 582 PROC_LOCK(p); 583 if (p->p_state == PRS_ZOMBIE) { 584 PROC_UNLOCK(p); 585 continue; 586 } 587 PROC_UNLOCK(p); 588 pgadjustjobc(hispgrp, entering); 589 } 590 } 591 592 /* 593 * A process group has become orphaned; 594 * if there are any stopped processes in the group, 595 * hang-up all process in that group. 596 */ 597 static void 598 orphanpg(pg) 599 struct pgrp *pg; 600 { 601 register struct proc *p; 602 603 PGRP_LOCK_ASSERT(pg, MA_OWNED); 604 605 LIST_FOREACH(p, &pg->pg_members, p_pglist) { 606 PROC_LOCK(p); 607 if (P_SHOULDSTOP(p)) { 608 PROC_UNLOCK(p); 609 LIST_FOREACH(p, &pg->pg_members, p_pglist) { 610 PROC_LOCK(p); 611 kern_psignal(p, SIGHUP); 612 kern_psignal(p, SIGCONT); 613 PROC_UNLOCK(p); 614 } 615 return; 616 } 617 PROC_UNLOCK(p); 618 } 619 } 620 621 void 622 sess_hold(struct session *s) 623 { 624 625 refcount_acquire(&s->s_count); 626 } 627 628 void 629 sess_release(struct session *s) 630 { 631 632 if (refcount_release(&s->s_count)) { 633 if (s->s_ttyp != NULL) { 634 tty_lock(s->s_ttyp); 635 tty_rel_sess(s->s_ttyp, s); 636 } 637 mtx_destroy(&s->s_mtx); 638 free(s, M_SESSION); 639 } 640 } 641 642 #include "opt_ddb.h" 643 #ifdef DDB 644 #include <ddb/ddb.h> 645 646 DB_SHOW_COMMAND(pgrpdump, pgrpdump) 647 { 648 register struct pgrp *pgrp; 649 register struct proc *p; 650 register int i; 651 652 for (i = 0; i <= pgrphash; i++) { 653 if (!LIST_EMPTY(&pgrphashtbl[i])) { 654 printf("\tindx %d\n", i); 655 LIST_FOREACH(pgrp, &pgrphashtbl[i], pg_hash) { 656 printf( 657 "\tpgrp %p, pgid %ld, sess %p, sesscnt %d, mem %p\n", 658 (void *)pgrp, (long)pgrp->pg_id, 659 (void *)pgrp->pg_session, 660 pgrp->pg_session->s_count, 661 (void *)LIST_FIRST(&pgrp->pg_members)); 662 LIST_FOREACH(p, &pgrp->pg_members, p_pglist) { 663 printf("\t\tpid %ld addr %p pgrp %p\n", 664 (long)p->p_pid, (void *)p, 665 (void *)p->p_pgrp); 666 } 667 } 668 } 669 } 670 } 671 #endif /* DDB */ 672 673 /* 674 * Calculate the kinfo_proc members which contain process-wide 675 * informations. 676 * Must be called with the target process locked. 677 */ 678 static void 679 fill_kinfo_aggregate(struct proc *p, struct kinfo_proc *kp) 680 { 681 struct thread *td; 682 683 PROC_LOCK_ASSERT(p, MA_OWNED); 684 685 kp->ki_estcpu = 0; 686 kp->ki_pctcpu = 0; 687 FOREACH_THREAD_IN_PROC(p, td) { 688 thread_lock(td); 689 kp->ki_pctcpu += sched_pctcpu(td); 690 kp->ki_estcpu += td->td_estcpu; 691 thread_unlock(td); 692 } 693 } 694 695 /* 696 * Clear kinfo_proc and fill in any information that is common 697 * to all threads in the process. 698 * Must be called with the target process locked. 699 */ 700 static void 701 fill_kinfo_proc_only(struct proc *p, struct kinfo_proc *kp) 702 { 703 struct thread *td0; 704 struct tty *tp; 705 struct session *sp; 706 struct ucred *cred; 707 struct sigacts *ps; 708 709 PROC_LOCK_ASSERT(p, MA_OWNED); 710 bzero(kp, sizeof(*kp)); 711 712 kp->ki_structsize = sizeof(*kp); 713 kp->ki_paddr = p; 714 kp->ki_addr =/* p->p_addr; */0; /* XXX */ 715 kp->ki_args = p->p_args; 716 kp->ki_textvp = p->p_textvp; 717 #ifdef KTRACE 718 kp->ki_tracep = p->p_tracevp; 719 kp->ki_traceflag = p->p_traceflag; 720 #endif 721 kp->ki_fd = p->p_fd; 722 kp->ki_vmspace = p->p_vmspace; 723 kp->ki_flag = p->p_flag; 724 cred = p->p_ucred; 725 if (cred) { 726 kp->ki_uid = cred->cr_uid; 727 kp->ki_ruid = cred->cr_ruid; 728 kp->ki_svuid = cred->cr_svuid; 729 kp->ki_cr_flags = 0; 730 if (cred->cr_flags & CRED_FLAG_CAPMODE) 731 kp->ki_cr_flags |= KI_CRF_CAPABILITY_MODE; 732 /* XXX bde doesn't like KI_NGROUPS */ 733 if (cred->cr_ngroups > KI_NGROUPS) { 734 kp->ki_ngroups = KI_NGROUPS; 735 kp->ki_cr_flags |= KI_CRF_GRP_OVERFLOW; 736 } else 737 kp->ki_ngroups = cred->cr_ngroups; 738 bcopy(cred->cr_groups, kp->ki_groups, 739 kp->ki_ngroups * sizeof(gid_t)); 740 kp->ki_rgid = cred->cr_rgid; 741 kp->ki_svgid = cred->cr_svgid; 742 /* If jailed(cred), emulate the old P_JAILED flag. */ 743 if (jailed(cred)) { 744 kp->ki_flag |= P_JAILED; 745 /* If inside the jail, use 0 as a jail ID. */ 746 if (cred->cr_prison != curthread->td_ucred->cr_prison) 747 kp->ki_jid = cred->cr_prison->pr_id; 748 } 749 strlcpy(kp->ki_loginclass, cred->cr_loginclass->lc_name, 750 sizeof(kp->ki_loginclass)); 751 } 752 ps = p->p_sigacts; 753 if (ps) { 754 mtx_lock(&ps->ps_mtx); 755 kp->ki_sigignore = ps->ps_sigignore; 756 kp->ki_sigcatch = ps->ps_sigcatch; 757 mtx_unlock(&ps->ps_mtx); 758 } 759 if (p->p_state != PRS_NEW && 760 p->p_state != PRS_ZOMBIE && 761 p->p_vmspace != NULL) { 762 struct vmspace *vm = p->p_vmspace; 763 764 kp->ki_size = vm->vm_map.size; 765 kp->ki_rssize = vmspace_resident_count(vm); /*XXX*/ 766 FOREACH_THREAD_IN_PROC(p, td0) { 767 if (!TD_IS_SWAPPED(td0)) 768 kp->ki_rssize += td0->td_kstack_pages; 769 } 770 kp->ki_swrss = vm->vm_swrss; 771 kp->ki_tsize = vm->vm_tsize; 772 kp->ki_dsize = vm->vm_dsize; 773 kp->ki_ssize = vm->vm_ssize; 774 } else if (p->p_state == PRS_ZOMBIE) 775 kp->ki_stat = SZOMB; 776 if (kp->ki_flag & P_INMEM) 777 kp->ki_sflag = PS_INMEM; 778 else 779 kp->ki_sflag = 0; 780 /* Calculate legacy swtime as seconds since 'swtick'. */ 781 kp->ki_swtime = (ticks - p->p_swtick) / hz; 782 kp->ki_pid = p->p_pid; 783 kp->ki_nice = p->p_nice; 784 kp->ki_start = p->p_stats->p_start; 785 timevaladd(&kp->ki_start, &boottime); 786 PROC_SLOCK(p); 787 rufetch(p, &kp->ki_rusage); 788 kp->ki_runtime = cputick2usec(p->p_rux.rux_runtime); 789 calcru(p, &kp->ki_rusage.ru_utime, &kp->ki_rusage.ru_stime); 790 PROC_SUNLOCK(p); 791 calccru(p, &kp->ki_childutime, &kp->ki_childstime); 792 /* Some callers want child times in a single value. */ 793 kp->ki_childtime = kp->ki_childstime; 794 timevaladd(&kp->ki_childtime, &kp->ki_childutime); 795 796 tp = NULL; 797 if (p->p_pgrp) { 798 kp->ki_pgid = p->p_pgrp->pg_id; 799 kp->ki_jobc = p->p_pgrp->pg_jobc; 800 sp = p->p_pgrp->pg_session; 801 802 if (sp != NULL) { 803 kp->ki_sid = sp->s_sid; 804 SESS_LOCK(sp); 805 strlcpy(kp->ki_login, sp->s_login, 806 sizeof(kp->ki_login)); 807 if (sp->s_ttyvp) 808 kp->ki_kiflag |= KI_CTTY; 809 if (SESS_LEADER(p)) 810 kp->ki_kiflag |= KI_SLEADER; 811 /* XXX proctree_lock */ 812 tp = sp->s_ttyp; 813 SESS_UNLOCK(sp); 814 } 815 } 816 if ((p->p_flag & P_CONTROLT) && tp != NULL) { 817 kp->ki_tdev = tty_udev(tp); 818 kp->ki_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 819 if (tp->t_session) 820 kp->ki_tsid = tp->t_session->s_sid; 821 } else 822 kp->ki_tdev = NODEV; 823 if (p->p_comm[0] != '\0') 824 strlcpy(kp->ki_comm, p->p_comm, sizeof(kp->ki_comm)); 825 if (p->p_sysent && p->p_sysent->sv_name != NULL && 826 p->p_sysent->sv_name[0] != '\0') 827 strlcpy(kp->ki_emul, p->p_sysent->sv_name, sizeof(kp->ki_emul)); 828 kp->ki_siglist = p->p_siglist; 829 kp->ki_xstat = p->p_xstat; 830 kp->ki_acflag = p->p_acflag; 831 kp->ki_lock = p->p_lock; 832 if (p->p_pptr) 833 kp->ki_ppid = p->p_pptr->p_pid; 834 } 835 836 /* 837 * Fill in information that is thread specific. Must be called with 838 * target process locked. If 'preferthread' is set, overwrite certain 839 * process-related fields that are maintained for both threads and 840 * processes. 841 */ 842 static void 843 fill_kinfo_thread(struct thread *td, struct kinfo_proc *kp, int preferthread) 844 { 845 struct proc *p; 846 847 p = td->td_proc; 848 kp->ki_tdaddr = td; 849 PROC_LOCK_ASSERT(p, MA_OWNED); 850 851 if (preferthread) 852 PROC_SLOCK(p); 853 thread_lock(td); 854 if (td->td_wmesg != NULL) 855 strlcpy(kp->ki_wmesg, td->td_wmesg, sizeof(kp->ki_wmesg)); 856 else 857 bzero(kp->ki_wmesg, sizeof(kp->ki_wmesg)); 858 strlcpy(kp->ki_tdname, td->td_name, sizeof(kp->ki_tdname)); 859 if (TD_ON_LOCK(td)) { 860 kp->ki_kiflag |= KI_LOCKBLOCK; 861 strlcpy(kp->ki_lockname, td->td_lockname, 862 sizeof(kp->ki_lockname)); 863 } else { 864 kp->ki_kiflag &= ~KI_LOCKBLOCK; 865 bzero(kp->ki_lockname, sizeof(kp->ki_lockname)); 866 } 867 868 if (p->p_state == PRS_NORMAL) { /* approximate. */ 869 if (TD_ON_RUNQ(td) || 870 TD_CAN_RUN(td) || 871 TD_IS_RUNNING(td)) { 872 kp->ki_stat = SRUN; 873 } else if (P_SHOULDSTOP(p)) { 874 kp->ki_stat = SSTOP; 875 } else if (TD_IS_SLEEPING(td)) { 876 kp->ki_stat = SSLEEP; 877 } else if (TD_ON_LOCK(td)) { 878 kp->ki_stat = SLOCK; 879 } else { 880 kp->ki_stat = SWAIT; 881 } 882 } else if (p->p_state == PRS_ZOMBIE) { 883 kp->ki_stat = SZOMB; 884 } else { 885 kp->ki_stat = SIDL; 886 } 887 888 /* Things in the thread */ 889 kp->ki_wchan = td->td_wchan; 890 kp->ki_pri.pri_level = td->td_priority; 891 kp->ki_pri.pri_native = td->td_base_pri; 892 kp->ki_lastcpu = td->td_lastcpu; 893 kp->ki_oncpu = td->td_oncpu; 894 kp->ki_tdflags = td->td_flags; 895 kp->ki_tid = td->td_tid; 896 kp->ki_numthreads = p->p_numthreads; 897 kp->ki_pcb = td->td_pcb; 898 kp->ki_kstack = (void *)td->td_kstack; 899 kp->ki_slptime = (ticks - td->td_slptick) / hz; 900 kp->ki_pri.pri_class = td->td_pri_class; 901 kp->ki_pri.pri_user = td->td_user_pri; 902 903 if (preferthread) { 904 rufetchtd(td, &kp->ki_rusage); 905 kp->ki_runtime = cputick2usec(td->td_rux.rux_runtime); 906 kp->ki_pctcpu = sched_pctcpu(td); 907 kp->ki_estcpu = td->td_estcpu; 908 } 909 910 /* We can't get this anymore but ps etc never used it anyway. */ 911 kp->ki_rqindex = 0; 912 913 if (preferthread) 914 kp->ki_siglist = td->td_siglist; 915 kp->ki_sigmask = td->td_sigmask; 916 thread_unlock(td); 917 if (preferthread) 918 PROC_SUNLOCK(p); 919 } 920 921 /* 922 * Fill in a kinfo_proc structure for the specified process. 923 * Must be called with the target process locked. 924 */ 925 void 926 fill_kinfo_proc(struct proc *p, struct kinfo_proc *kp) 927 { 928 929 MPASS(FIRST_THREAD_IN_PROC(p) != NULL); 930 931 fill_kinfo_proc_only(p, kp); 932 fill_kinfo_thread(FIRST_THREAD_IN_PROC(p), kp, 0); 933 fill_kinfo_aggregate(p, kp); 934 } 935 936 struct pstats * 937 pstats_alloc(void) 938 { 939 940 return (malloc(sizeof(struct pstats), M_SUBPROC, M_ZERO|M_WAITOK)); 941 } 942 943 /* 944 * Copy parts of p_stats; zero the rest of p_stats (statistics). 945 */ 946 void 947 pstats_fork(struct pstats *src, struct pstats *dst) 948 { 949 950 bzero(&dst->pstat_startzero, 951 __rangeof(struct pstats, pstat_startzero, pstat_endzero)); 952 bcopy(&src->pstat_startcopy, &dst->pstat_startcopy, 953 __rangeof(struct pstats, pstat_startcopy, pstat_endcopy)); 954 } 955 956 void 957 pstats_free(struct pstats *ps) 958 { 959 960 free(ps, M_SUBPROC); 961 } 962 963 /* 964 * Locate a zombie process by number 965 */ 966 struct proc * 967 zpfind(pid_t pid) 968 { 969 struct proc *p; 970 971 sx_slock(&allproc_lock); 972 LIST_FOREACH(p, &zombproc, p_list) 973 if (p->p_pid == pid) { 974 PROC_LOCK(p); 975 break; 976 } 977 sx_sunlock(&allproc_lock); 978 return (p); 979 } 980 981 #define KERN_PROC_ZOMBMASK 0x3 982 #define KERN_PROC_NOTHREADS 0x4 983 984 #ifdef COMPAT_FREEBSD32 985 986 /* 987 * This function is typically used to copy out the kernel address, so 988 * it can be replaced by assignment of zero. 989 */ 990 static inline uint32_t 991 ptr32_trim(void *ptr) 992 { 993 uintptr_t uptr; 994 995 uptr = (uintptr_t)ptr; 996 return ((uptr > UINT_MAX) ? 0 : uptr); 997 } 998 999 #define PTRTRIM_CP(src,dst,fld) \ 1000 do { (dst).fld = ptr32_trim((src).fld); } while (0) 1001 1002 static void 1003 freebsd32_kinfo_proc_out(const struct kinfo_proc *ki, struct kinfo_proc32 *ki32) 1004 { 1005 int i; 1006 1007 bzero(ki32, sizeof(struct kinfo_proc32)); 1008 ki32->ki_structsize = sizeof(struct kinfo_proc32); 1009 CP(*ki, *ki32, ki_layout); 1010 PTRTRIM_CP(*ki, *ki32, ki_args); 1011 PTRTRIM_CP(*ki, *ki32, ki_paddr); 1012 PTRTRIM_CP(*ki, *ki32, ki_addr); 1013 PTRTRIM_CP(*ki, *ki32, ki_tracep); 1014 PTRTRIM_CP(*ki, *ki32, ki_textvp); 1015 PTRTRIM_CP(*ki, *ki32, ki_fd); 1016 PTRTRIM_CP(*ki, *ki32, ki_vmspace); 1017 PTRTRIM_CP(*ki, *ki32, ki_wchan); 1018 CP(*ki, *ki32, ki_pid); 1019 CP(*ki, *ki32, ki_ppid); 1020 CP(*ki, *ki32, ki_pgid); 1021 CP(*ki, *ki32, ki_tpgid); 1022 CP(*ki, *ki32, ki_sid); 1023 CP(*ki, *ki32, ki_tsid); 1024 CP(*ki, *ki32, ki_jobc); 1025 CP(*ki, *ki32, ki_tdev); 1026 CP(*ki, *ki32, ki_siglist); 1027 CP(*ki, *ki32, ki_sigmask); 1028 CP(*ki, *ki32, ki_sigignore); 1029 CP(*ki, *ki32, ki_sigcatch); 1030 CP(*ki, *ki32, ki_uid); 1031 CP(*ki, *ki32, ki_ruid); 1032 CP(*ki, *ki32, ki_svuid); 1033 CP(*ki, *ki32, ki_rgid); 1034 CP(*ki, *ki32, ki_svgid); 1035 CP(*ki, *ki32, ki_ngroups); 1036 for (i = 0; i < KI_NGROUPS; i++) 1037 CP(*ki, *ki32, ki_groups[i]); 1038 CP(*ki, *ki32, ki_size); 1039 CP(*ki, *ki32, ki_rssize); 1040 CP(*ki, *ki32, ki_swrss); 1041 CP(*ki, *ki32, ki_tsize); 1042 CP(*ki, *ki32, ki_dsize); 1043 CP(*ki, *ki32, ki_ssize); 1044 CP(*ki, *ki32, ki_xstat); 1045 CP(*ki, *ki32, ki_acflag); 1046 CP(*ki, *ki32, ki_pctcpu); 1047 CP(*ki, *ki32, ki_estcpu); 1048 CP(*ki, *ki32, ki_slptime); 1049 CP(*ki, *ki32, ki_swtime); 1050 CP(*ki, *ki32, ki_runtime); 1051 TV_CP(*ki, *ki32, ki_start); 1052 TV_CP(*ki, *ki32, ki_childtime); 1053 CP(*ki, *ki32, ki_flag); 1054 CP(*ki, *ki32, ki_kiflag); 1055 CP(*ki, *ki32, ki_traceflag); 1056 CP(*ki, *ki32, ki_stat); 1057 CP(*ki, *ki32, ki_nice); 1058 CP(*ki, *ki32, ki_lock); 1059 CP(*ki, *ki32, ki_rqindex); 1060 CP(*ki, *ki32, ki_oncpu); 1061 CP(*ki, *ki32, ki_lastcpu); 1062 bcopy(ki->ki_tdname, ki32->ki_tdname, TDNAMLEN + 1); 1063 bcopy(ki->ki_wmesg, ki32->ki_wmesg, WMESGLEN + 1); 1064 bcopy(ki->ki_login, ki32->ki_login, LOGNAMELEN + 1); 1065 bcopy(ki->ki_lockname, ki32->ki_lockname, LOCKNAMELEN + 1); 1066 bcopy(ki->ki_comm, ki32->ki_comm, COMMLEN + 1); 1067 bcopy(ki->ki_emul, ki32->ki_emul, KI_EMULNAMELEN + 1); 1068 bcopy(ki->ki_loginclass, ki32->ki_loginclass, LOGINCLASSLEN + 1); 1069 CP(*ki, *ki32, ki_cr_flags); 1070 CP(*ki, *ki32, ki_jid); 1071 CP(*ki, *ki32, ki_numthreads); 1072 CP(*ki, *ki32, ki_tid); 1073 CP(*ki, *ki32, ki_pri); 1074 freebsd32_rusage_out(&ki->ki_rusage, &ki32->ki_rusage); 1075 freebsd32_rusage_out(&ki->ki_rusage_ch, &ki32->ki_rusage_ch); 1076 PTRTRIM_CP(*ki, *ki32, ki_pcb); 1077 PTRTRIM_CP(*ki, *ki32, ki_kstack); 1078 PTRTRIM_CP(*ki, *ki32, ki_udata); 1079 CP(*ki, *ki32, ki_sflag); 1080 CP(*ki, *ki32, ki_tdflags); 1081 } 1082 1083 static int 1084 sysctl_out_proc_copyout(struct kinfo_proc *ki, struct sysctl_req *req) 1085 { 1086 struct kinfo_proc32 ki32; 1087 int error; 1088 1089 if (req->flags & SCTL_MASK32) { 1090 freebsd32_kinfo_proc_out(ki, &ki32); 1091 error = SYSCTL_OUT(req, &ki32, sizeof(struct kinfo_proc32)); 1092 } else 1093 error = SYSCTL_OUT(req, ki, sizeof(struct kinfo_proc)); 1094 return (error); 1095 } 1096 #else 1097 static int 1098 sysctl_out_proc_copyout(struct kinfo_proc *ki, struct sysctl_req *req) 1099 { 1100 1101 return (SYSCTL_OUT(req, ki, sizeof(struct kinfo_proc))); 1102 } 1103 #endif 1104 1105 /* 1106 * Must be called with the process locked and will return with it unlocked. 1107 */ 1108 static int 1109 sysctl_out_proc(struct proc *p, struct sysctl_req *req, int flags) 1110 { 1111 struct thread *td; 1112 struct kinfo_proc kinfo_proc; 1113 int error = 0; 1114 struct proc *np; 1115 pid_t pid = p->p_pid; 1116 1117 PROC_LOCK_ASSERT(p, MA_OWNED); 1118 MPASS(FIRST_THREAD_IN_PROC(p) != NULL); 1119 1120 fill_kinfo_proc(p, &kinfo_proc); 1121 if (flags & KERN_PROC_NOTHREADS) 1122 error = sysctl_out_proc_copyout(&kinfo_proc, req); 1123 else { 1124 FOREACH_THREAD_IN_PROC(p, td) { 1125 fill_kinfo_thread(td, &kinfo_proc, 1); 1126 error = sysctl_out_proc_copyout(&kinfo_proc, req); 1127 if (error) 1128 break; 1129 } 1130 } 1131 PROC_UNLOCK(p); 1132 if (error) 1133 return (error); 1134 if (flags & KERN_PROC_ZOMBMASK) 1135 np = zpfind(pid); 1136 else { 1137 if (pid == 0) 1138 return (0); 1139 np = pfind(pid); 1140 } 1141 if (np == NULL) 1142 return (ESRCH); 1143 if (np != p) { 1144 PROC_UNLOCK(np); 1145 return (ESRCH); 1146 } 1147 PROC_UNLOCK(np); 1148 return (0); 1149 } 1150 1151 static int 1152 sysctl_kern_proc(SYSCTL_HANDLER_ARGS) 1153 { 1154 int *name = (int*) arg1; 1155 u_int namelen = arg2; 1156 struct proc *p; 1157 int flags, doingzomb, oid_number; 1158 int error = 0; 1159 1160 oid_number = oidp->oid_number; 1161 if (oid_number != KERN_PROC_ALL && 1162 (oid_number & KERN_PROC_INC_THREAD) == 0) 1163 flags = KERN_PROC_NOTHREADS; 1164 else { 1165 flags = 0; 1166 oid_number &= ~KERN_PROC_INC_THREAD; 1167 } 1168 if (oid_number == KERN_PROC_PID) { 1169 if (namelen != 1) 1170 return (EINVAL); 1171 error = sysctl_wire_old_buffer(req, 0); 1172 if (error) 1173 return (error); 1174 p = pfind((pid_t)name[0]); 1175 if (!p) 1176 return (ESRCH); 1177 if ((error = p_cansee(curthread, p))) { 1178 PROC_UNLOCK(p); 1179 return (error); 1180 } 1181 error = sysctl_out_proc(p, req, flags); 1182 return (error); 1183 } 1184 1185 switch (oid_number) { 1186 case KERN_PROC_ALL: 1187 if (namelen != 0) 1188 return (EINVAL); 1189 break; 1190 case KERN_PROC_PROC: 1191 if (namelen != 0 && namelen != 1) 1192 return (EINVAL); 1193 break; 1194 default: 1195 if (namelen != 1) 1196 return (EINVAL); 1197 break; 1198 } 1199 1200 if (!req->oldptr) { 1201 /* overestimate by 5 procs */ 1202 error = SYSCTL_OUT(req, 0, sizeof (struct kinfo_proc) * 5); 1203 if (error) 1204 return (error); 1205 } 1206 error = sysctl_wire_old_buffer(req, 0); 1207 if (error != 0) 1208 return (error); 1209 sx_slock(&allproc_lock); 1210 for (doingzomb=0 ; doingzomb < 2 ; doingzomb++) { 1211 if (!doingzomb) 1212 p = LIST_FIRST(&allproc); 1213 else 1214 p = LIST_FIRST(&zombproc); 1215 for (; p != 0; p = LIST_NEXT(p, p_list)) { 1216 /* 1217 * Skip embryonic processes. 1218 */ 1219 PROC_LOCK(p); 1220 if (p->p_state == PRS_NEW) { 1221 PROC_UNLOCK(p); 1222 continue; 1223 } 1224 KASSERT(p->p_ucred != NULL, 1225 ("process credential is NULL for non-NEW proc")); 1226 /* 1227 * Show a user only appropriate processes. 1228 */ 1229 if (p_cansee(curthread, p)) { 1230 PROC_UNLOCK(p); 1231 continue; 1232 } 1233 /* 1234 * TODO - make more efficient (see notes below). 1235 * do by session. 1236 */ 1237 switch (oid_number) { 1238 1239 case KERN_PROC_GID: 1240 if (p->p_ucred->cr_gid != (gid_t)name[0]) { 1241 PROC_UNLOCK(p); 1242 continue; 1243 } 1244 break; 1245 1246 case KERN_PROC_PGRP: 1247 /* could do this by traversing pgrp */ 1248 if (p->p_pgrp == NULL || 1249 p->p_pgrp->pg_id != (pid_t)name[0]) { 1250 PROC_UNLOCK(p); 1251 continue; 1252 } 1253 break; 1254 1255 case KERN_PROC_RGID: 1256 if (p->p_ucred->cr_rgid != (gid_t)name[0]) { 1257 PROC_UNLOCK(p); 1258 continue; 1259 } 1260 break; 1261 1262 case KERN_PROC_SESSION: 1263 if (p->p_session == NULL || 1264 p->p_session->s_sid != (pid_t)name[0]) { 1265 PROC_UNLOCK(p); 1266 continue; 1267 } 1268 break; 1269 1270 case KERN_PROC_TTY: 1271 if ((p->p_flag & P_CONTROLT) == 0 || 1272 p->p_session == NULL) { 1273 PROC_UNLOCK(p); 1274 continue; 1275 } 1276 /* XXX proctree_lock */ 1277 SESS_LOCK(p->p_session); 1278 if (p->p_session->s_ttyp == NULL || 1279 tty_udev(p->p_session->s_ttyp) != 1280 (dev_t)name[0]) { 1281 SESS_UNLOCK(p->p_session); 1282 PROC_UNLOCK(p); 1283 continue; 1284 } 1285 SESS_UNLOCK(p->p_session); 1286 break; 1287 1288 case KERN_PROC_UID: 1289 if (p->p_ucred->cr_uid != (uid_t)name[0]) { 1290 PROC_UNLOCK(p); 1291 continue; 1292 } 1293 break; 1294 1295 case KERN_PROC_RUID: 1296 if (p->p_ucred->cr_ruid != (uid_t)name[0]) { 1297 PROC_UNLOCK(p); 1298 continue; 1299 } 1300 break; 1301 1302 case KERN_PROC_PROC: 1303 break; 1304 1305 default: 1306 break; 1307 1308 } 1309 1310 error = sysctl_out_proc(p, req, flags | doingzomb); 1311 if (error) { 1312 sx_sunlock(&allproc_lock); 1313 return (error); 1314 } 1315 } 1316 } 1317 sx_sunlock(&allproc_lock); 1318 return (0); 1319 } 1320 1321 struct pargs * 1322 pargs_alloc(int len) 1323 { 1324 struct pargs *pa; 1325 1326 pa = malloc(sizeof(struct pargs) + len, M_PARGS, 1327 M_WAITOK); 1328 refcount_init(&pa->ar_ref, 1); 1329 pa->ar_length = len; 1330 return (pa); 1331 } 1332 1333 static void 1334 pargs_free(struct pargs *pa) 1335 { 1336 1337 free(pa, M_PARGS); 1338 } 1339 1340 void 1341 pargs_hold(struct pargs *pa) 1342 { 1343 1344 if (pa == NULL) 1345 return; 1346 refcount_acquire(&pa->ar_ref); 1347 } 1348 1349 void 1350 pargs_drop(struct pargs *pa) 1351 { 1352 1353 if (pa == NULL) 1354 return; 1355 if (refcount_release(&pa->ar_ref)) 1356 pargs_free(pa); 1357 } 1358 1359 /* 1360 * This sysctl allows a process to retrieve the argument list or process 1361 * title for another process without groping around in the address space 1362 * of the other process. It also allow a process to set its own "process 1363 * title to a string of its own choice. 1364 */ 1365 static int 1366 sysctl_kern_proc_args(SYSCTL_HANDLER_ARGS) 1367 { 1368 int *name = (int*) arg1; 1369 u_int namelen = arg2; 1370 struct pargs *newpa, *pa; 1371 struct proc *p; 1372 int error = 0; 1373 1374 if (namelen != 1) 1375 return (EINVAL); 1376 1377 p = pfind((pid_t)name[0]); 1378 if (!p) 1379 return (ESRCH); 1380 1381 if ((error = p_cansee(curthread, p)) != 0) { 1382 PROC_UNLOCK(p); 1383 return (error); 1384 } 1385 1386 if (req->newptr && curproc != p) { 1387 PROC_UNLOCK(p); 1388 return (EPERM); 1389 } 1390 1391 pa = p->p_args; 1392 pargs_hold(pa); 1393 PROC_UNLOCK(p); 1394 if (pa != NULL) 1395 error = SYSCTL_OUT(req, pa->ar_args, pa->ar_length); 1396 pargs_drop(pa); 1397 if (error != 0 || req->newptr == NULL) 1398 return (error); 1399 1400 if (req->newlen + sizeof(struct pargs) > ps_arg_cache_limit) 1401 return (ENOMEM); 1402 newpa = pargs_alloc(req->newlen); 1403 error = SYSCTL_IN(req, newpa->ar_args, req->newlen); 1404 if (error != 0) { 1405 pargs_free(newpa); 1406 return (error); 1407 } 1408 PROC_LOCK(p); 1409 pa = p->p_args; 1410 p->p_args = newpa; 1411 PROC_UNLOCK(p); 1412 pargs_drop(pa); 1413 return (0); 1414 } 1415 1416 /* 1417 * This sysctl allows a process to retrieve the path of the executable for 1418 * itself or another process. 1419 */ 1420 static int 1421 sysctl_kern_proc_pathname(SYSCTL_HANDLER_ARGS) 1422 { 1423 pid_t *pidp = (pid_t *)arg1; 1424 unsigned int arglen = arg2; 1425 struct proc *p; 1426 struct vnode *vp; 1427 char *retbuf, *freebuf; 1428 int error, vfslocked; 1429 1430 if (arglen != 1) 1431 return (EINVAL); 1432 if (*pidp == -1) { /* -1 means this process */ 1433 p = req->td->td_proc; 1434 } else { 1435 p = pfind(*pidp); 1436 if (p == NULL) 1437 return (ESRCH); 1438 if ((error = p_cansee(curthread, p)) != 0) { 1439 PROC_UNLOCK(p); 1440 return (error); 1441 } 1442 } 1443 1444 vp = p->p_textvp; 1445 if (vp == NULL) { 1446 if (*pidp != -1) 1447 PROC_UNLOCK(p); 1448 return (0); 1449 } 1450 vref(vp); 1451 if (*pidp != -1) 1452 PROC_UNLOCK(p); 1453 error = vn_fullpath(req->td, vp, &retbuf, &freebuf); 1454 vfslocked = VFS_LOCK_GIANT(vp->v_mount); 1455 vrele(vp); 1456 VFS_UNLOCK_GIANT(vfslocked); 1457 if (error) 1458 return (error); 1459 error = SYSCTL_OUT(req, retbuf, strlen(retbuf) + 1); 1460 free(freebuf, M_TEMP); 1461 return (error); 1462 } 1463 1464 static int 1465 sysctl_kern_proc_sv_name(SYSCTL_HANDLER_ARGS) 1466 { 1467 struct proc *p; 1468 char *sv_name; 1469 int *name; 1470 int namelen; 1471 int error; 1472 1473 namelen = arg2; 1474 if (namelen != 1) 1475 return (EINVAL); 1476 1477 name = (int *)arg1; 1478 if ((p = pfind((pid_t)name[0])) == NULL) 1479 return (ESRCH); 1480 if ((error = p_cansee(curthread, p))) { 1481 PROC_UNLOCK(p); 1482 return (error); 1483 } 1484 sv_name = p->p_sysent->sv_name; 1485 PROC_UNLOCK(p); 1486 return (sysctl_handle_string(oidp, sv_name, 0, req)); 1487 } 1488 1489 #ifdef KINFO_OVMENTRY_SIZE 1490 CTASSERT(sizeof(struct kinfo_ovmentry) == KINFO_OVMENTRY_SIZE); 1491 #endif 1492 1493 #ifdef COMPAT_FREEBSD7 1494 static int 1495 sysctl_kern_proc_ovmmap(SYSCTL_HANDLER_ARGS) 1496 { 1497 vm_map_entry_t entry, tmp_entry; 1498 unsigned int last_timestamp; 1499 char *fullpath, *freepath; 1500 struct kinfo_ovmentry *kve; 1501 struct vattr va; 1502 struct ucred *cred; 1503 int error, *name; 1504 struct vnode *vp; 1505 struct proc *p; 1506 vm_map_t map; 1507 struct vmspace *vm; 1508 1509 name = (int *)arg1; 1510 if ((p = pfind((pid_t)name[0])) == NULL) 1511 return (ESRCH); 1512 if (p->p_flag & P_WEXIT) { 1513 PROC_UNLOCK(p); 1514 return (ESRCH); 1515 } 1516 if ((error = p_candebug(curthread, p))) { 1517 PROC_UNLOCK(p); 1518 return (error); 1519 } 1520 _PHOLD(p); 1521 PROC_UNLOCK(p); 1522 vm = vmspace_acquire_ref(p); 1523 if (vm == NULL) { 1524 PRELE(p); 1525 return (ESRCH); 1526 } 1527 kve = malloc(sizeof(*kve), M_TEMP, M_WAITOK); 1528 1529 map = &p->p_vmspace->vm_map; /* XXXRW: More locking required? */ 1530 vm_map_lock_read(map); 1531 for (entry = map->header.next; entry != &map->header; 1532 entry = entry->next) { 1533 vm_object_t obj, tobj, lobj; 1534 vm_offset_t addr; 1535 int vfslocked; 1536 1537 if (entry->eflags & MAP_ENTRY_IS_SUB_MAP) 1538 continue; 1539 1540 bzero(kve, sizeof(*kve)); 1541 kve->kve_structsize = sizeof(*kve); 1542 1543 kve->kve_private_resident = 0; 1544 obj = entry->object.vm_object; 1545 if (obj != NULL) { 1546 VM_OBJECT_LOCK(obj); 1547 if (obj->shadow_count == 1) 1548 kve->kve_private_resident = 1549 obj->resident_page_count; 1550 } 1551 kve->kve_resident = 0; 1552 addr = entry->start; 1553 while (addr < entry->end) { 1554 if (pmap_extract(map->pmap, addr)) 1555 kve->kve_resident++; 1556 addr += PAGE_SIZE; 1557 } 1558 1559 for (lobj = tobj = obj; tobj; tobj = tobj->backing_object) { 1560 if (tobj != obj) 1561 VM_OBJECT_LOCK(tobj); 1562 if (lobj != obj) 1563 VM_OBJECT_UNLOCK(lobj); 1564 lobj = tobj; 1565 } 1566 1567 kve->kve_start = (void*)entry->start; 1568 kve->kve_end = (void*)entry->end; 1569 kve->kve_offset = (off_t)entry->offset; 1570 1571 if (entry->protection & VM_PROT_READ) 1572 kve->kve_protection |= KVME_PROT_READ; 1573 if (entry->protection & VM_PROT_WRITE) 1574 kve->kve_protection |= KVME_PROT_WRITE; 1575 if (entry->protection & VM_PROT_EXECUTE) 1576 kve->kve_protection |= KVME_PROT_EXEC; 1577 1578 if (entry->eflags & MAP_ENTRY_COW) 1579 kve->kve_flags |= KVME_FLAG_COW; 1580 if (entry->eflags & MAP_ENTRY_NEEDS_COPY) 1581 kve->kve_flags |= KVME_FLAG_NEEDS_COPY; 1582 if (entry->eflags & MAP_ENTRY_NOCOREDUMP) 1583 kve->kve_flags |= KVME_FLAG_NOCOREDUMP; 1584 1585 last_timestamp = map->timestamp; 1586 vm_map_unlock_read(map); 1587 1588 kve->kve_fileid = 0; 1589 kve->kve_fsid = 0; 1590 freepath = NULL; 1591 fullpath = ""; 1592 if (lobj) { 1593 vp = NULL; 1594 switch (lobj->type) { 1595 case OBJT_DEFAULT: 1596 kve->kve_type = KVME_TYPE_DEFAULT; 1597 break; 1598 case OBJT_VNODE: 1599 kve->kve_type = KVME_TYPE_VNODE; 1600 vp = lobj->handle; 1601 vref(vp); 1602 break; 1603 case OBJT_SWAP: 1604 kve->kve_type = KVME_TYPE_SWAP; 1605 break; 1606 case OBJT_DEVICE: 1607 kve->kve_type = KVME_TYPE_DEVICE; 1608 break; 1609 case OBJT_PHYS: 1610 kve->kve_type = KVME_TYPE_PHYS; 1611 break; 1612 case OBJT_DEAD: 1613 kve->kve_type = KVME_TYPE_DEAD; 1614 break; 1615 case OBJT_SG: 1616 kve->kve_type = KVME_TYPE_SG; 1617 break; 1618 default: 1619 kve->kve_type = KVME_TYPE_UNKNOWN; 1620 break; 1621 } 1622 if (lobj != obj) 1623 VM_OBJECT_UNLOCK(lobj); 1624 1625 kve->kve_ref_count = obj->ref_count; 1626 kve->kve_shadow_count = obj->shadow_count; 1627 VM_OBJECT_UNLOCK(obj); 1628 if (vp != NULL) { 1629 vn_fullpath(curthread, vp, &fullpath, 1630 &freepath); 1631 cred = curthread->td_ucred; 1632 vfslocked = VFS_LOCK_GIANT(vp->v_mount); 1633 vn_lock(vp, LK_SHARED | LK_RETRY); 1634 if (VOP_GETATTR(vp, &va, cred) == 0) { 1635 kve->kve_fileid = va.va_fileid; 1636 kve->kve_fsid = va.va_fsid; 1637 } 1638 vput(vp); 1639 VFS_UNLOCK_GIANT(vfslocked); 1640 } 1641 } else { 1642 kve->kve_type = KVME_TYPE_NONE; 1643 kve->kve_ref_count = 0; 1644 kve->kve_shadow_count = 0; 1645 } 1646 1647 strlcpy(kve->kve_path, fullpath, sizeof(kve->kve_path)); 1648 if (freepath != NULL) 1649 free(freepath, M_TEMP); 1650 1651 error = SYSCTL_OUT(req, kve, sizeof(*kve)); 1652 vm_map_lock_read(map); 1653 if (error) 1654 break; 1655 if (last_timestamp != map->timestamp) { 1656 vm_map_lookup_entry(map, addr - 1, &tmp_entry); 1657 entry = tmp_entry; 1658 } 1659 } 1660 vm_map_unlock_read(map); 1661 vmspace_free(vm); 1662 PRELE(p); 1663 free(kve, M_TEMP); 1664 return (error); 1665 } 1666 #endif /* COMPAT_FREEBSD7 */ 1667 1668 #ifdef KINFO_VMENTRY_SIZE 1669 CTASSERT(sizeof(struct kinfo_vmentry) == KINFO_VMENTRY_SIZE); 1670 #endif 1671 1672 static int 1673 sysctl_kern_proc_vmmap(SYSCTL_HANDLER_ARGS) 1674 { 1675 vm_map_entry_t entry, tmp_entry; 1676 unsigned int last_timestamp; 1677 char *fullpath, *freepath; 1678 struct kinfo_vmentry *kve; 1679 struct vattr va; 1680 struct ucred *cred; 1681 int error, *name; 1682 struct vnode *vp; 1683 struct proc *p; 1684 struct vmspace *vm; 1685 vm_map_t map; 1686 1687 name = (int *)arg1; 1688 if ((p = pfind((pid_t)name[0])) == NULL) 1689 return (ESRCH); 1690 if (p->p_flag & P_WEXIT) { 1691 PROC_UNLOCK(p); 1692 return (ESRCH); 1693 } 1694 if ((error = p_candebug(curthread, p))) { 1695 PROC_UNLOCK(p); 1696 return (error); 1697 } 1698 _PHOLD(p); 1699 PROC_UNLOCK(p); 1700 vm = vmspace_acquire_ref(p); 1701 if (vm == NULL) { 1702 PRELE(p); 1703 return (ESRCH); 1704 } 1705 kve = malloc(sizeof(*kve), M_TEMP, M_WAITOK); 1706 1707 map = &vm->vm_map; /* XXXRW: More locking required? */ 1708 vm_map_lock_read(map); 1709 for (entry = map->header.next; entry != &map->header; 1710 entry = entry->next) { 1711 vm_object_t obj, tobj, lobj; 1712 vm_offset_t addr; 1713 int vfslocked; 1714 1715 if (entry->eflags & MAP_ENTRY_IS_SUB_MAP) 1716 continue; 1717 1718 bzero(kve, sizeof(*kve)); 1719 1720 kve->kve_private_resident = 0; 1721 obj = entry->object.vm_object; 1722 if (obj != NULL) { 1723 VM_OBJECT_LOCK(obj); 1724 if (obj->shadow_count == 1) 1725 kve->kve_private_resident = 1726 obj->resident_page_count; 1727 } 1728 kve->kve_resident = 0; 1729 addr = entry->start; 1730 while (addr < entry->end) { 1731 if (pmap_extract(map->pmap, addr)) 1732 kve->kve_resident++; 1733 addr += PAGE_SIZE; 1734 } 1735 1736 for (lobj = tobj = obj; tobj; tobj = tobj->backing_object) { 1737 if (tobj != obj) 1738 VM_OBJECT_LOCK(tobj); 1739 if (lobj != obj) 1740 VM_OBJECT_UNLOCK(lobj); 1741 lobj = tobj; 1742 } 1743 1744 kve->kve_start = entry->start; 1745 kve->kve_end = entry->end; 1746 kve->kve_offset = entry->offset; 1747 1748 if (entry->protection & VM_PROT_READ) 1749 kve->kve_protection |= KVME_PROT_READ; 1750 if (entry->protection & VM_PROT_WRITE) 1751 kve->kve_protection |= KVME_PROT_WRITE; 1752 if (entry->protection & VM_PROT_EXECUTE) 1753 kve->kve_protection |= KVME_PROT_EXEC; 1754 1755 if (entry->eflags & MAP_ENTRY_COW) 1756 kve->kve_flags |= KVME_FLAG_COW; 1757 if (entry->eflags & MAP_ENTRY_NEEDS_COPY) 1758 kve->kve_flags |= KVME_FLAG_NEEDS_COPY; 1759 if (entry->eflags & MAP_ENTRY_NOCOREDUMP) 1760 kve->kve_flags |= KVME_FLAG_NOCOREDUMP; 1761 1762 last_timestamp = map->timestamp; 1763 vm_map_unlock_read(map); 1764 1765 freepath = NULL; 1766 fullpath = ""; 1767 if (lobj) { 1768 vp = NULL; 1769 switch (lobj->type) { 1770 case OBJT_DEFAULT: 1771 kve->kve_type = KVME_TYPE_DEFAULT; 1772 break; 1773 case OBJT_VNODE: 1774 kve->kve_type = KVME_TYPE_VNODE; 1775 vp = lobj->handle; 1776 vref(vp); 1777 break; 1778 case OBJT_SWAP: 1779 kve->kve_type = KVME_TYPE_SWAP; 1780 break; 1781 case OBJT_DEVICE: 1782 kve->kve_type = KVME_TYPE_DEVICE; 1783 break; 1784 case OBJT_PHYS: 1785 kve->kve_type = KVME_TYPE_PHYS; 1786 break; 1787 case OBJT_DEAD: 1788 kve->kve_type = KVME_TYPE_DEAD; 1789 break; 1790 case OBJT_SG: 1791 kve->kve_type = KVME_TYPE_SG; 1792 break; 1793 default: 1794 kve->kve_type = KVME_TYPE_UNKNOWN; 1795 break; 1796 } 1797 if (lobj != obj) 1798 VM_OBJECT_UNLOCK(lobj); 1799 1800 kve->kve_ref_count = obj->ref_count; 1801 kve->kve_shadow_count = obj->shadow_count; 1802 VM_OBJECT_UNLOCK(obj); 1803 if (vp != NULL) { 1804 vn_fullpath(curthread, vp, &fullpath, 1805 &freepath); 1806 kve->kve_vn_type = vntype_to_kinfo(vp->v_type); 1807 cred = curthread->td_ucred; 1808 vfslocked = VFS_LOCK_GIANT(vp->v_mount); 1809 vn_lock(vp, LK_SHARED | LK_RETRY); 1810 if (VOP_GETATTR(vp, &va, cred) == 0) { 1811 kve->kve_vn_fileid = va.va_fileid; 1812 kve->kve_vn_fsid = va.va_fsid; 1813 kve->kve_vn_mode = 1814 MAKEIMODE(va.va_type, va.va_mode); 1815 kve->kve_vn_size = va.va_size; 1816 kve->kve_vn_rdev = va.va_rdev; 1817 kve->kve_status = KF_ATTR_VALID; 1818 } 1819 vput(vp); 1820 VFS_UNLOCK_GIANT(vfslocked); 1821 } 1822 } else { 1823 kve->kve_type = KVME_TYPE_NONE; 1824 kve->kve_ref_count = 0; 1825 kve->kve_shadow_count = 0; 1826 } 1827 1828 strlcpy(kve->kve_path, fullpath, sizeof(kve->kve_path)); 1829 if (freepath != NULL) 1830 free(freepath, M_TEMP); 1831 1832 /* Pack record size down */ 1833 kve->kve_structsize = offsetof(struct kinfo_vmentry, kve_path) + 1834 strlen(kve->kve_path) + 1; 1835 kve->kve_structsize = roundup(kve->kve_structsize, 1836 sizeof(uint64_t)); 1837 error = SYSCTL_OUT(req, kve, kve->kve_structsize); 1838 vm_map_lock_read(map); 1839 if (error) 1840 break; 1841 if (last_timestamp != map->timestamp) { 1842 vm_map_lookup_entry(map, addr - 1, &tmp_entry); 1843 entry = tmp_entry; 1844 } 1845 } 1846 vm_map_unlock_read(map); 1847 vmspace_free(vm); 1848 PRELE(p); 1849 free(kve, M_TEMP); 1850 return (error); 1851 } 1852 1853 #if defined(STACK) || defined(DDB) 1854 static int 1855 sysctl_kern_proc_kstack(SYSCTL_HANDLER_ARGS) 1856 { 1857 struct kinfo_kstack *kkstp; 1858 int error, i, *name, numthreads; 1859 lwpid_t *lwpidarray; 1860 struct thread *td; 1861 struct stack *st; 1862 struct sbuf sb; 1863 struct proc *p; 1864 1865 name = (int *)arg1; 1866 if ((p = pfind((pid_t)name[0])) == NULL) 1867 return (ESRCH); 1868 /* XXXRW: Not clear ESRCH is the right error during proc execve(). */ 1869 if (p->p_flag & P_WEXIT || p->p_flag & P_INEXEC) { 1870 PROC_UNLOCK(p); 1871 return (ESRCH); 1872 } 1873 if ((error = p_candebug(curthread, p))) { 1874 PROC_UNLOCK(p); 1875 return (error); 1876 } 1877 _PHOLD(p); 1878 PROC_UNLOCK(p); 1879 1880 kkstp = malloc(sizeof(*kkstp), M_TEMP, M_WAITOK); 1881 st = stack_create(); 1882 1883 lwpidarray = NULL; 1884 numthreads = 0; 1885 PROC_LOCK(p); 1886 repeat: 1887 if (numthreads < p->p_numthreads) { 1888 if (lwpidarray != NULL) { 1889 free(lwpidarray, M_TEMP); 1890 lwpidarray = NULL; 1891 } 1892 numthreads = p->p_numthreads; 1893 PROC_UNLOCK(p); 1894 lwpidarray = malloc(sizeof(*lwpidarray) * numthreads, M_TEMP, 1895 M_WAITOK | M_ZERO); 1896 PROC_LOCK(p); 1897 goto repeat; 1898 } 1899 i = 0; 1900 1901 /* 1902 * XXXRW: During the below loop, execve(2) and countless other sorts 1903 * of changes could have taken place. Should we check to see if the 1904 * vmspace has been replaced, or the like, in order to prevent 1905 * giving a snapshot that spans, say, execve(2), with some threads 1906 * before and some after? Among other things, the credentials could 1907 * have changed, in which case the right to extract debug info might 1908 * no longer be assured. 1909 */ 1910 FOREACH_THREAD_IN_PROC(p, td) { 1911 KASSERT(i < numthreads, 1912 ("sysctl_kern_proc_kstack: numthreads")); 1913 lwpidarray[i] = td->td_tid; 1914 i++; 1915 } 1916 numthreads = i; 1917 for (i = 0; i < numthreads; i++) { 1918 td = thread_find(p, lwpidarray[i]); 1919 if (td == NULL) { 1920 continue; 1921 } 1922 bzero(kkstp, sizeof(*kkstp)); 1923 (void)sbuf_new(&sb, kkstp->kkst_trace, 1924 sizeof(kkstp->kkst_trace), SBUF_FIXEDLEN); 1925 thread_lock(td); 1926 kkstp->kkst_tid = td->td_tid; 1927 if (TD_IS_SWAPPED(td)) 1928 kkstp->kkst_state = KKST_STATE_SWAPPED; 1929 else if (TD_IS_RUNNING(td)) 1930 kkstp->kkst_state = KKST_STATE_RUNNING; 1931 else { 1932 kkstp->kkst_state = KKST_STATE_STACKOK; 1933 stack_save_td(st, td); 1934 } 1935 thread_unlock(td); 1936 PROC_UNLOCK(p); 1937 stack_sbuf_print(&sb, st); 1938 sbuf_finish(&sb); 1939 sbuf_delete(&sb); 1940 error = SYSCTL_OUT(req, kkstp, sizeof(*kkstp)); 1941 PROC_LOCK(p); 1942 if (error) 1943 break; 1944 } 1945 _PRELE(p); 1946 PROC_UNLOCK(p); 1947 if (lwpidarray != NULL) 1948 free(lwpidarray, M_TEMP); 1949 stack_destroy(st); 1950 free(kkstp, M_TEMP); 1951 return (error); 1952 } 1953 #endif 1954 1955 /* 1956 * This sysctl allows a process to retrieve the full list of groups from 1957 * itself or another process. 1958 */ 1959 static int 1960 sysctl_kern_proc_groups(SYSCTL_HANDLER_ARGS) 1961 { 1962 pid_t *pidp = (pid_t *)arg1; 1963 unsigned int arglen = arg2; 1964 struct proc *p; 1965 struct ucred *cred; 1966 int error; 1967 1968 if (arglen != 1) 1969 return (EINVAL); 1970 if (*pidp == -1) { /* -1 means this process */ 1971 p = req->td->td_proc; 1972 } else { 1973 p = pfind(*pidp); 1974 if (p == NULL) 1975 return (ESRCH); 1976 if ((error = p_cansee(curthread, p)) != 0) { 1977 PROC_UNLOCK(p); 1978 return (error); 1979 } 1980 } 1981 1982 cred = crhold(p->p_ucred); 1983 if (*pidp != -1) 1984 PROC_UNLOCK(p); 1985 1986 error = SYSCTL_OUT(req, cred->cr_groups, 1987 cred->cr_ngroups * sizeof(gid_t)); 1988 crfree(cred); 1989 return (error); 1990 } 1991 1992 SYSCTL_NODE(_kern, KERN_PROC, proc, CTLFLAG_RD, 0, "Process table"); 1993 1994 SYSCTL_PROC(_kern_proc, KERN_PROC_ALL, all, CTLFLAG_RD|CTLTYPE_STRUCT| 1995 CTLFLAG_MPSAFE, 0, 0, sysctl_kern_proc, "S,proc", 1996 "Return entire process table"); 1997 1998 static SYSCTL_NODE(_kern_proc, KERN_PROC_GID, gid, CTLFLAG_RD | CTLFLAG_MPSAFE, 1999 sysctl_kern_proc, "Process table"); 2000 2001 static SYSCTL_NODE(_kern_proc, KERN_PROC_PGRP, pgrp, CTLFLAG_RD | CTLFLAG_MPSAFE, 2002 sysctl_kern_proc, "Process table"); 2003 2004 static SYSCTL_NODE(_kern_proc, KERN_PROC_RGID, rgid, CTLFLAG_RD | CTLFLAG_MPSAFE, 2005 sysctl_kern_proc, "Process table"); 2006 2007 static SYSCTL_NODE(_kern_proc, KERN_PROC_SESSION, sid, CTLFLAG_RD | 2008 CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table"); 2009 2010 static SYSCTL_NODE(_kern_proc, KERN_PROC_TTY, tty, CTLFLAG_RD | CTLFLAG_MPSAFE, 2011 sysctl_kern_proc, "Process table"); 2012 2013 static SYSCTL_NODE(_kern_proc, KERN_PROC_UID, uid, CTLFLAG_RD | CTLFLAG_MPSAFE, 2014 sysctl_kern_proc, "Process table"); 2015 2016 static SYSCTL_NODE(_kern_proc, KERN_PROC_RUID, ruid, CTLFLAG_RD | CTLFLAG_MPSAFE, 2017 sysctl_kern_proc, "Process table"); 2018 2019 static SYSCTL_NODE(_kern_proc, KERN_PROC_PID, pid, CTLFLAG_RD | CTLFLAG_MPSAFE, 2020 sysctl_kern_proc, "Process table"); 2021 2022 static SYSCTL_NODE(_kern_proc, KERN_PROC_PROC, proc, CTLFLAG_RD | CTLFLAG_MPSAFE, 2023 sysctl_kern_proc, "Return process table, no threads"); 2024 2025 static SYSCTL_NODE(_kern_proc, KERN_PROC_ARGS, args, 2026 CTLFLAG_RW | CTLFLAG_ANYBODY | CTLFLAG_MPSAFE, 2027 sysctl_kern_proc_args, "Process argument list"); 2028 2029 static SYSCTL_NODE(_kern_proc, KERN_PROC_PATHNAME, pathname, CTLFLAG_RD | 2030 CTLFLAG_MPSAFE, sysctl_kern_proc_pathname, "Process executable path"); 2031 2032 static SYSCTL_NODE(_kern_proc, KERN_PROC_SV_NAME, sv_name, CTLFLAG_RD | 2033 CTLFLAG_MPSAFE, sysctl_kern_proc_sv_name, 2034 "Process syscall vector name (ABI type)"); 2035 2036 static SYSCTL_NODE(_kern_proc, (KERN_PROC_GID | KERN_PROC_INC_THREAD), gid_td, 2037 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table"); 2038 2039 static SYSCTL_NODE(_kern_proc, (KERN_PROC_PGRP | KERN_PROC_INC_THREAD), pgrp_td, 2040 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table"); 2041 2042 static SYSCTL_NODE(_kern_proc, (KERN_PROC_RGID | KERN_PROC_INC_THREAD), rgid_td, 2043 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table"); 2044 2045 static SYSCTL_NODE(_kern_proc, (KERN_PROC_SESSION | KERN_PROC_INC_THREAD), 2046 sid_td, CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table"); 2047 2048 static SYSCTL_NODE(_kern_proc, (KERN_PROC_TTY | KERN_PROC_INC_THREAD), tty_td, 2049 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table"); 2050 2051 static SYSCTL_NODE(_kern_proc, (KERN_PROC_UID | KERN_PROC_INC_THREAD), uid_td, 2052 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table"); 2053 2054 static SYSCTL_NODE(_kern_proc, (KERN_PROC_RUID | KERN_PROC_INC_THREAD), ruid_td, 2055 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table"); 2056 2057 static SYSCTL_NODE(_kern_proc, (KERN_PROC_PID | KERN_PROC_INC_THREAD), pid_td, 2058 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table"); 2059 2060 static SYSCTL_NODE(_kern_proc, (KERN_PROC_PROC | KERN_PROC_INC_THREAD), proc_td, 2061 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, 2062 "Return process table, no threads"); 2063 2064 #ifdef COMPAT_FREEBSD7 2065 static SYSCTL_NODE(_kern_proc, KERN_PROC_OVMMAP, ovmmap, CTLFLAG_RD | 2066 CTLFLAG_MPSAFE, sysctl_kern_proc_ovmmap, "Old Process vm map entries"); 2067 #endif 2068 2069 static SYSCTL_NODE(_kern_proc, KERN_PROC_VMMAP, vmmap, CTLFLAG_RD | 2070 CTLFLAG_MPSAFE, sysctl_kern_proc_vmmap, "Process vm map entries"); 2071 2072 #if defined(STACK) || defined(DDB) 2073 static SYSCTL_NODE(_kern_proc, KERN_PROC_KSTACK, kstack, CTLFLAG_RD | 2074 CTLFLAG_MPSAFE, sysctl_kern_proc_kstack, "Process kernel stacks"); 2075 #endif 2076 2077 static SYSCTL_NODE(_kern_proc, KERN_PROC_GROUPS, groups, CTLFLAG_RD | 2078 CTLFLAG_MPSAFE, sysctl_kern_proc_groups, "Process groups"); 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