FreeBSD/Linux Kernel Cross Reference
sys/kern/kern_proc.c
1 /*-
2 * Copyright (c) 1982, 1986, 1989, 1991, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * @(#)kern_proc.c 8.7 (Berkeley) 2/14/95
30 */
31
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD$");
34
35 #include "opt_compat.h"
36 #include "opt_ddb.h"
37 #include "opt_kdtrace.h"
38 #include "opt_ktrace.h"
39 #include "opt_kstack_pages.h"
40 #include "opt_stack.h"
41
42 #include <sys/param.h>
43 #include <sys/systm.h>
44 #include <sys/kernel.h>
45 #include <sys/limits.h>
46 #include <sys/lock.h>
47 #include <sys/malloc.h>
48 #include <sys/mman.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/vm_page.h>
79 #include <vm/uma.h>
80
81 #ifdef COMPAT_FREEBSD32
82 #include <compat/freebsd32/freebsd32.h>
83 #include <compat/freebsd32/freebsd32_util.h>
84 #endif
85
86 SDT_PROVIDER_DEFINE(proc);
87 SDT_PROBE_DEFINE(proc, kernel, ctor, entry, entry);
88 SDT_PROBE_ARGTYPE(proc, kernel, ctor, entry, 0, "struct proc *");
89 SDT_PROBE_ARGTYPE(proc, kernel, ctor, entry, 1, "int");
90 SDT_PROBE_ARGTYPE(proc, kernel, ctor, entry, 2, "void *");
91 SDT_PROBE_ARGTYPE(proc, kernel, ctor, entry, 3, "int");
92 SDT_PROBE_DEFINE(proc, kernel, ctor, return, return);
93 SDT_PROBE_ARGTYPE(proc, kernel, ctor, return, 0, "struct proc *");
94 SDT_PROBE_ARGTYPE(proc, kernel, ctor, return, 1, "int");
95 SDT_PROBE_ARGTYPE(proc, kernel, ctor, return, 2, "void *");
96 SDT_PROBE_ARGTYPE(proc, kernel, ctor, return, 3, "int");
97 SDT_PROBE_DEFINE(proc, kernel, dtor, entry, entry);
98 SDT_PROBE_ARGTYPE(proc, kernel, dtor, entry, 0, "struct proc *");
99 SDT_PROBE_ARGTYPE(proc, kernel, dtor, entry, 1, "int");
100 SDT_PROBE_ARGTYPE(proc, kernel, dtor, entry, 2, "void *");
101 SDT_PROBE_ARGTYPE(proc, kernel, dtor, entry, 3, "struct thread *");
102 SDT_PROBE_DEFINE(proc, kernel, dtor, return, return);
103 SDT_PROBE_ARGTYPE(proc, kernel, dtor, return, 0, "struct proc *");
104 SDT_PROBE_ARGTYPE(proc, kernel, dtor, return, 1, "int");
105 SDT_PROBE_ARGTYPE(proc, kernel, dtor, return, 2, "void *");
106 SDT_PROBE_DEFINE(proc, kernel, init, entry, entry);
107 SDT_PROBE_ARGTYPE(proc, kernel, init, entry, 0, "struct proc *");
108 SDT_PROBE_ARGTYPE(proc, kernel, init, entry, 1, "int");
109 SDT_PROBE_ARGTYPE(proc, kernel, init, entry, 2, "int");
110 SDT_PROBE_DEFINE(proc, kernel, init, return, return);
111 SDT_PROBE_ARGTYPE(proc, kernel, init, return, 0, "struct proc *");
112 SDT_PROBE_ARGTYPE(proc, kernel, init, return, 1, "int");
113 SDT_PROBE_ARGTYPE(proc, kernel, init, return, 2, "int");
114
115 MALLOC_DEFINE(M_PGRP, "pgrp", "process group header");
116 MALLOC_DEFINE(M_SESSION, "session", "session header");
117 static MALLOC_DEFINE(M_PROC, "proc", "Proc structures");
118 MALLOC_DEFINE(M_SUBPROC, "subproc", "Proc sub-structures");
119
120 static void doenterpgrp(struct proc *, struct pgrp *);
121 static void orphanpg(struct pgrp *pg);
122 static void fill_kinfo_aggregate(struct proc *p, struct kinfo_proc *kp);
123 static void fill_kinfo_proc_only(struct proc *p, struct kinfo_proc *kp);
124 static void fill_kinfo_thread(struct thread *td, struct kinfo_proc *kp,
125 int preferthread);
126 static void pgadjustjobc(struct pgrp *pgrp, int entering);
127 static void pgdelete(struct pgrp *);
128 static int proc_ctor(void *mem, int size, void *arg, int flags);
129 static void proc_dtor(void *mem, int size, void *arg);
130 static int proc_init(void *mem, int size, int flags);
131 static void proc_fini(void *mem, int size);
132 static void pargs_free(struct pargs *pa);
133
134 /*
135 * Other process lists
136 */
137 struct pidhashhead *pidhashtbl;
138 u_long pidhash;
139 struct pgrphashhead *pgrphashtbl;
140 u_long pgrphash;
141 struct proclist allproc;
142 struct proclist zombproc;
143 struct sx allproc_lock;
144 struct sx proctree_lock;
145 struct mtx ppeers_lock;
146 uma_zone_t proc_zone;
147
148 int kstack_pages = KSTACK_PAGES;
149 SYSCTL_INT(_kern, OID_AUTO, kstack_pages, CTLFLAG_RD, &kstack_pages, 0,
150 "Kernel stack size in pages");
151
152 CTASSERT(sizeof(struct kinfo_proc) == KINFO_PROC_SIZE);
153 #ifdef COMPAT_FREEBSD32
154 CTASSERT(sizeof(struct kinfo_proc32) == KINFO_PROC32_SIZE);
155 #endif
156
157 /*
158 * Initialize global process hashing structures.
159 */
160 void
161 procinit()
162 {
163
164 sx_init(&allproc_lock, "allproc");
165 sx_init(&proctree_lock, "proctree");
166 mtx_init(&ppeers_lock, "p_peers", NULL, MTX_DEF);
167 LIST_INIT(&allproc);
168 LIST_INIT(&zombproc);
169 pidhashtbl = hashinit(maxproc / 4, M_PROC, &pidhash);
170 pgrphashtbl = hashinit(maxproc / 4, M_PROC, &pgrphash);
171 proc_zone = uma_zcreate("PROC", sched_sizeof_proc(),
172 proc_ctor, proc_dtor, proc_init, proc_fini,
173 UMA_ALIGN_PTR, UMA_ZONE_NOFREE);
174 uihashinit();
175 }
176
177 /*
178 * Prepare a proc for use.
179 */
180 static int
181 proc_ctor(void *mem, int size, void *arg, int flags)
182 {
183 struct proc *p;
184 struct thread *td;
185
186 p = (struct proc *)mem;
187 SDT_PROBE(proc, kernel, ctor , entry, p, size, arg, flags, 0);
188 EVENTHANDLER_INVOKE(process_ctor, p);
189 SDT_PROBE(proc, kernel, ctor , return, p, size, arg, flags, 0);
190 td = FIRST_THREAD_IN_PROC(p);
191 if (td != NULL) {
192 /* Make sure all thread constructors are executed */
193 EVENTHANDLER_INVOKE(thread_ctor, td);
194 }
195 return (0);
196 }
197
198 /*
199 * Reclaim a proc after use.
200 */
201 static void
202 proc_dtor(void *mem, int size, void *arg)
203 {
204 struct proc *p;
205 struct thread *td;
206
207 /* INVARIANTS checks go here */
208 p = (struct proc *)mem;
209 td = FIRST_THREAD_IN_PROC(p);
210 SDT_PROBE(proc, kernel, dtor, entry, p, size, arg, td, 0);
211 if (td != NULL) {
212 #ifdef INVARIANTS
213 KASSERT((p->p_numthreads == 1),
214 ("bad number of threads in exiting process"));
215 KASSERT(STAILQ_EMPTY(&p->p_ktr), ("proc_dtor: non-empty p_ktr"));
216 #endif
217 /* Free all OSD associated to this thread. */
218 osd_thread_exit(td);
219
220 /* Make sure all thread destructors are executed */
221 EVENTHANDLER_INVOKE(thread_dtor, td);
222 }
223 EVENTHANDLER_INVOKE(process_dtor, p);
224 if (p->p_ksi != NULL)
225 KASSERT(! KSI_ONQ(p->p_ksi), ("SIGCHLD queue"));
226 SDT_PROBE(proc, kernel, dtor, return, p, size, arg, 0, 0);
227 }
228
229 /*
230 * Initialize type-stable parts of a proc (when newly created).
231 */
232 static int
233 proc_init(void *mem, int size, int flags)
234 {
235 struct proc *p;
236
237 p = (struct proc *)mem;
238 SDT_PROBE(proc, kernel, init, entry, p, size, flags, 0, 0);
239 p->p_sched = (struct p_sched *)&p[1];
240 bzero(&p->p_mtx, sizeof(struct mtx));
241 mtx_init(&p->p_mtx, "process lock", NULL, MTX_DEF | MTX_DUPOK);
242 mtx_init(&p->p_slock, "process slock", NULL, MTX_SPIN | MTX_RECURSE);
243 cv_init(&p->p_pwait, "ppwait");
244 cv_init(&p->p_dbgwait, "dbgwait");
245 TAILQ_INIT(&p->p_threads); /* all threads in proc */
246 EVENTHANDLER_INVOKE(process_init, p);
247 p->p_stats = pstats_alloc();
248 SDT_PROBE(proc, kernel, init, return, p, size, flags, 0, 0);
249 return (0);
250 }
251
252 /*
253 * UMA should ensure that this function is never called.
254 * Freeing a proc structure would violate type stability.
255 */
256 static void
257 proc_fini(void *mem, int size)
258 {
259 #ifdef notnow
260 struct proc *p;
261
262 p = (struct proc *)mem;
263 EVENTHANDLER_INVOKE(process_fini, p);
264 pstats_free(p->p_stats);
265 thread_free(FIRST_THREAD_IN_PROC(p));
266 mtx_destroy(&p->p_mtx);
267 if (p->p_ksi != NULL)
268 ksiginfo_free(p->p_ksi);
269 #else
270 panic("proc reclaimed");
271 #endif
272 }
273
274 /*
275 * Is p an inferior of the current process?
276 */
277 int
278 inferior(p)
279 register struct proc *p;
280 {
281
282 sx_assert(&proctree_lock, SX_LOCKED);
283 for (; p != curproc; p = p->p_pptr)
284 if (p->p_pid == 0)
285 return (0);
286 return (1);
287 }
288
289 /*
290 * Locate a process by number; return only "live" processes -- i.e., neither
291 * zombies nor newly born but incompletely initialized processes. By not
292 * returning processes in the PRS_NEW state, we allow callers to avoid
293 * testing for that condition to avoid dereferencing p_ucred, et al.
294 */
295 struct proc *
296 pfind(pid)
297 register pid_t pid;
298 {
299 register struct proc *p;
300
301 sx_slock(&allproc_lock);
302 LIST_FOREACH(p, PIDHASH(pid), p_hash)
303 if (p->p_pid == pid) {
304 PROC_LOCK(p);
305 if (p->p_state == PRS_NEW) {
306 PROC_UNLOCK(p);
307 p = NULL;
308 }
309 break;
310 }
311 sx_sunlock(&allproc_lock);
312 return (p);
313 }
314
315 static struct proc *
316 pfind_tid(pid_t tid)
317 {
318 struct proc *p;
319 struct thread *td;
320
321 sx_slock(&allproc_lock);
322 FOREACH_PROC_IN_SYSTEM(p) {
323 PROC_LOCK(p);
324 if (p->p_state == PRS_NEW) {
325 PROC_UNLOCK(p);
326 continue;
327 }
328 FOREACH_THREAD_IN_PROC(p, td) {
329 if (td->td_tid == tid)
330 goto found;
331 }
332 PROC_UNLOCK(p);
333 }
334 found:
335 sx_sunlock(&allproc_lock);
336 return (p);
337 }
338
339 /*
340 * Locate a process group by number.
341 * The caller must hold proctree_lock.
342 */
343 struct pgrp *
344 pgfind(pgid)
345 register pid_t pgid;
346 {
347 register struct pgrp *pgrp;
348
349 sx_assert(&proctree_lock, SX_LOCKED);
350
351 LIST_FOREACH(pgrp, PGRPHASH(pgid), pg_hash) {
352 if (pgrp->pg_id == pgid) {
353 PGRP_LOCK(pgrp);
354 return (pgrp);
355 }
356 }
357 return (NULL);
358 }
359
360 /*
361 * Locate process and do additional manipulations, depending on flags.
362 */
363 int
364 pget(pid_t pid, int flags, struct proc **pp)
365 {
366 struct proc *p;
367 int error;
368
369 if (pid <= PID_MAX)
370 p = pfind(pid);
371 else if ((flags & PGET_NOTID) == 0)
372 p = pfind_tid(pid);
373 else
374 p = NULL;
375 if (p == NULL)
376 return (ESRCH);
377 if ((flags & PGET_CANSEE) != 0) {
378 error = p_cansee(curthread, p);
379 if (error != 0)
380 goto errout;
381 }
382 if ((flags & PGET_CANDEBUG) != 0) {
383 error = p_candebug(curthread, p);
384 if (error != 0)
385 goto errout;
386 }
387 if ((flags & PGET_ISCURRENT) != 0 && curproc != p) {
388 error = EPERM;
389 goto errout;
390 }
391 if ((flags & PGET_NOTWEXIT) != 0 && (p->p_flag & P_WEXIT) != 0) {
392 error = ESRCH;
393 goto errout;
394 }
395 if ((flags & PGET_NOTINEXEC) != 0 && (p->p_flag & P_INEXEC) != 0) {
396 /*
397 * XXXRW: Not clear ESRCH is the right error during proc
398 * execve().
399 */
400 error = ESRCH;
401 goto errout;
402 }
403 if ((flags & PGET_HOLD) != 0) {
404 _PHOLD(p);
405 PROC_UNLOCK(p);
406 }
407 *pp = p;
408 return (0);
409 errout:
410 PROC_UNLOCK(p);
411 return (error);
412 }
413
414 /*
415 * Create a new process group.
416 * pgid must be equal to the pid of p.
417 * Begin a new session if required.
418 */
419 int
420 enterpgrp(p, pgid, pgrp, sess)
421 register struct proc *p;
422 pid_t pgid;
423 struct pgrp *pgrp;
424 struct session *sess;
425 {
426
427 sx_assert(&proctree_lock, SX_XLOCKED);
428
429 KASSERT(pgrp != NULL, ("enterpgrp: pgrp == NULL"));
430 KASSERT(p->p_pid == pgid,
431 ("enterpgrp: new pgrp and pid != pgid"));
432 KASSERT(pgfind(pgid) == NULL,
433 ("enterpgrp: pgrp with pgid exists"));
434 KASSERT(!SESS_LEADER(p),
435 ("enterpgrp: session leader attempted setpgrp"));
436
437 mtx_init(&pgrp->pg_mtx, "process group", NULL, MTX_DEF | MTX_DUPOK);
438
439 if (sess != NULL) {
440 /*
441 * new session
442 */
443 mtx_init(&sess->s_mtx, "session", NULL, MTX_DEF);
444 PROC_LOCK(p);
445 p->p_flag &= ~P_CONTROLT;
446 PROC_UNLOCK(p);
447 PGRP_LOCK(pgrp);
448 sess->s_leader = p;
449 sess->s_sid = p->p_pid;
450 refcount_init(&sess->s_count, 1);
451 sess->s_ttyvp = NULL;
452 sess->s_ttyp = NULL;
453 bcopy(p->p_session->s_login, sess->s_login,
454 sizeof(sess->s_login));
455 pgrp->pg_session = sess;
456 KASSERT(p == curproc,
457 ("enterpgrp: mksession and p != curproc"));
458 } else {
459 pgrp->pg_session = p->p_session;
460 sess_hold(pgrp->pg_session);
461 PGRP_LOCK(pgrp);
462 }
463 pgrp->pg_id = pgid;
464 LIST_INIT(&pgrp->pg_members);
465
466 /*
467 * As we have an exclusive lock of proctree_lock,
468 * this should not deadlock.
469 */
470 LIST_INSERT_HEAD(PGRPHASH(pgid), pgrp, pg_hash);
471 pgrp->pg_jobc = 0;
472 SLIST_INIT(&pgrp->pg_sigiolst);
473 PGRP_UNLOCK(pgrp);
474
475 doenterpgrp(p, pgrp);
476
477 return (0);
478 }
479
480 /*
481 * Move p to an existing process group
482 */
483 int
484 enterthispgrp(p, pgrp)
485 register struct proc *p;
486 struct pgrp *pgrp;
487 {
488
489 sx_assert(&proctree_lock, SX_XLOCKED);
490 PROC_LOCK_ASSERT(p, MA_NOTOWNED);
491 PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED);
492 PGRP_LOCK_ASSERT(p->p_pgrp, MA_NOTOWNED);
493 SESS_LOCK_ASSERT(p->p_session, MA_NOTOWNED);
494 KASSERT(pgrp->pg_session == p->p_session,
495 ("%s: pgrp's session %p, p->p_session %p.\n",
496 __func__,
497 pgrp->pg_session,
498 p->p_session));
499 KASSERT(pgrp != p->p_pgrp,
500 ("%s: p belongs to pgrp.", __func__));
501
502 doenterpgrp(p, pgrp);
503
504 return (0);
505 }
506
507 /*
508 * Move p to a process group
509 */
510 static void
511 doenterpgrp(p, pgrp)
512 struct proc *p;
513 struct pgrp *pgrp;
514 {
515 struct pgrp *savepgrp;
516
517 sx_assert(&proctree_lock, SX_XLOCKED);
518 PROC_LOCK_ASSERT(p, MA_NOTOWNED);
519 PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED);
520 PGRP_LOCK_ASSERT(p->p_pgrp, MA_NOTOWNED);
521 SESS_LOCK_ASSERT(p->p_session, MA_NOTOWNED);
522
523 savepgrp = p->p_pgrp;
524
525 /*
526 * Adjust eligibility of affected pgrps to participate in job control.
527 * Increment eligibility counts before decrementing, otherwise we
528 * could reach 0 spuriously during the first call.
529 */
530 fixjobc(p, pgrp, 1);
531 fixjobc(p, p->p_pgrp, 0);
532
533 PGRP_LOCK(pgrp);
534 PGRP_LOCK(savepgrp);
535 PROC_LOCK(p);
536 LIST_REMOVE(p, p_pglist);
537 p->p_pgrp = pgrp;
538 PROC_UNLOCK(p);
539 LIST_INSERT_HEAD(&pgrp->pg_members, p, p_pglist);
540 PGRP_UNLOCK(savepgrp);
541 PGRP_UNLOCK(pgrp);
542 if (LIST_EMPTY(&savepgrp->pg_members))
543 pgdelete(savepgrp);
544 }
545
546 /*
547 * remove process from process group
548 */
549 int
550 leavepgrp(p)
551 register struct proc *p;
552 {
553 struct pgrp *savepgrp;
554
555 sx_assert(&proctree_lock, SX_XLOCKED);
556 savepgrp = p->p_pgrp;
557 PGRP_LOCK(savepgrp);
558 PROC_LOCK(p);
559 LIST_REMOVE(p, p_pglist);
560 p->p_pgrp = NULL;
561 PROC_UNLOCK(p);
562 PGRP_UNLOCK(savepgrp);
563 if (LIST_EMPTY(&savepgrp->pg_members))
564 pgdelete(savepgrp);
565 return (0);
566 }
567
568 /*
569 * delete a process group
570 */
571 static void
572 pgdelete(pgrp)
573 register struct pgrp *pgrp;
574 {
575 struct session *savesess;
576 struct tty *tp;
577
578 sx_assert(&proctree_lock, SX_XLOCKED);
579 PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED);
580 SESS_LOCK_ASSERT(pgrp->pg_session, MA_NOTOWNED);
581
582 /*
583 * Reset any sigio structures pointing to us as a result of
584 * F_SETOWN with our pgid.
585 */
586 funsetownlst(&pgrp->pg_sigiolst);
587
588 PGRP_LOCK(pgrp);
589 tp = pgrp->pg_session->s_ttyp;
590 LIST_REMOVE(pgrp, pg_hash);
591 savesess = pgrp->pg_session;
592 PGRP_UNLOCK(pgrp);
593
594 /* Remove the reference to the pgrp before deallocating it. */
595 if (tp != NULL) {
596 tty_lock(tp);
597 tty_rel_pgrp(tp, pgrp);
598 }
599
600 mtx_destroy(&pgrp->pg_mtx);
601 free(pgrp, M_PGRP);
602 sess_release(savesess);
603 }
604
605 static void
606 pgadjustjobc(pgrp, entering)
607 struct pgrp *pgrp;
608 int entering;
609 {
610
611 PGRP_LOCK(pgrp);
612 if (entering)
613 pgrp->pg_jobc++;
614 else {
615 --pgrp->pg_jobc;
616 if (pgrp->pg_jobc == 0)
617 orphanpg(pgrp);
618 }
619 PGRP_UNLOCK(pgrp);
620 }
621
622 /*
623 * Adjust pgrp jobc counters when specified process changes process group.
624 * We count the number of processes in each process group that "qualify"
625 * the group for terminal job control (those with a parent in a different
626 * process group of the same session). If that count reaches zero, the
627 * process group becomes orphaned. Check both the specified process'
628 * process group and that of its children.
629 * entering == 0 => p is leaving specified group.
630 * entering == 1 => p is entering specified group.
631 */
632 void
633 fixjobc(p, pgrp, entering)
634 register struct proc *p;
635 register struct pgrp *pgrp;
636 int entering;
637 {
638 register struct pgrp *hispgrp;
639 register struct session *mysession;
640
641 sx_assert(&proctree_lock, SX_LOCKED);
642 PROC_LOCK_ASSERT(p, MA_NOTOWNED);
643 PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED);
644 SESS_LOCK_ASSERT(pgrp->pg_session, MA_NOTOWNED);
645
646 /*
647 * Check p's parent to see whether p qualifies its own process
648 * group; if so, adjust count for p's process group.
649 */
650 mysession = pgrp->pg_session;
651 if ((hispgrp = p->p_pptr->p_pgrp) != pgrp &&
652 hispgrp->pg_session == mysession)
653 pgadjustjobc(pgrp, entering);
654
655 /*
656 * Check this process' children to see whether they qualify
657 * their process groups; if so, adjust counts for children's
658 * process groups.
659 */
660 LIST_FOREACH(p, &p->p_children, p_sibling) {
661 hispgrp = p->p_pgrp;
662 if (hispgrp == pgrp ||
663 hispgrp->pg_session != mysession)
664 continue;
665 PROC_LOCK(p);
666 if (p->p_state == PRS_ZOMBIE) {
667 PROC_UNLOCK(p);
668 continue;
669 }
670 PROC_UNLOCK(p);
671 pgadjustjobc(hispgrp, entering);
672 }
673 }
674
675 /*
676 * A process group has become orphaned;
677 * if there are any stopped processes in the group,
678 * hang-up all process in that group.
679 */
680 static void
681 orphanpg(pg)
682 struct pgrp *pg;
683 {
684 register struct proc *p;
685
686 PGRP_LOCK_ASSERT(pg, MA_OWNED);
687
688 LIST_FOREACH(p, &pg->pg_members, p_pglist) {
689 PROC_LOCK(p);
690 if (P_SHOULDSTOP(p)) {
691 PROC_UNLOCK(p);
692 LIST_FOREACH(p, &pg->pg_members, p_pglist) {
693 PROC_LOCK(p);
694 psignal(p, SIGHUP);
695 psignal(p, SIGCONT);
696 PROC_UNLOCK(p);
697 }
698 return;
699 }
700 PROC_UNLOCK(p);
701 }
702 }
703
704 void
705 sess_hold(struct session *s)
706 {
707
708 refcount_acquire(&s->s_count);
709 }
710
711 void
712 sess_release(struct session *s)
713 {
714
715 if (refcount_release(&s->s_count)) {
716 if (s->s_ttyp != NULL) {
717 tty_lock(s->s_ttyp);
718 tty_rel_sess(s->s_ttyp, s);
719 }
720 mtx_destroy(&s->s_mtx);
721 free(s, M_SESSION);
722 }
723 }
724
725 #include "opt_ddb.h"
726 #ifdef DDB
727 #include <ddb/ddb.h>
728
729 DB_SHOW_COMMAND(pgrpdump, pgrpdump)
730 {
731 register struct pgrp *pgrp;
732 register struct proc *p;
733 register int i;
734
735 for (i = 0; i <= pgrphash; i++) {
736 if (!LIST_EMPTY(&pgrphashtbl[i])) {
737 printf("\tindx %d\n", i);
738 LIST_FOREACH(pgrp, &pgrphashtbl[i], pg_hash) {
739 printf(
740 "\tpgrp %p, pgid %ld, sess %p, sesscnt %d, mem %p\n",
741 (void *)pgrp, (long)pgrp->pg_id,
742 (void *)pgrp->pg_session,
743 pgrp->pg_session->s_count,
744 (void *)LIST_FIRST(&pgrp->pg_members));
745 LIST_FOREACH(p, &pgrp->pg_members, p_pglist) {
746 printf("\t\tpid %ld addr %p pgrp %p\n",
747 (long)p->p_pid, (void *)p,
748 (void *)p->p_pgrp);
749 }
750 }
751 }
752 }
753 }
754 #endif /* DDB */
755
756 /*
757 * Calculate the kinfo_proc members which contain process-wide
758 * informations.
759 * Must be called with the target process locked.
760 */
761 static void
762 fill_kinfo_aggregate(struct proc *p, struct kinfo_proc *kp)
763 {
764 struct thread *td;
765
766 PROC_LOCK_ASSERT(p, MA_OWNED);
767
768 kp->ki_estcpu = 0;
769 kp->ki_pctcpu = 0;
770 FOREACH_THREAD_IN_PROC(p, td) {
771 thread_lock(td);
772 kp->ki_pctcpu += sched_pctcpu(td);
773 kp->ki_estcpu += td->td_estcpu;
774 thread_unlock(td);
775 }
776 }
777
778 /*
779 * Clear kinfo_proc and fill in any information that is common
780 * to all threads in the process.
781 * Must be called with the target process locked.
782 */
783 static void
784 fill_kinfo_proc_only(struct proc *p, struct kinfo_proc *kp)
785 {
786 struct thread *td0;
787 struct tty *tp;
788 struct session *sp;
789 struct ucred *cred;
790 struct sigacts *ps;
791
792 PROC_LOCK_ASSERT(p, MA_OWNED);
793 bzero(kp, sizeof(*kp));
794
795 kp->ki_structsize = sizeof(*kp);
796 kp->ki_paddr = p;
797 kp->ki_addr =/* p->p_addr; */0; /* XXX */
798 kp->ki_args = p->p_args;
799 kp->ki_textvp = p->p_textvp;
800 #ifdef KTRACE
801 kp->ki_tracep = p->p_tracevp;
802 kp->ki_traceflag = p->p_traceflag;
803 #endif
804 kp->ki_fd = p->p_fd;
805 kp->ki_vmspace = p->p_vmspace;
806 kp->ki_flag = p->p_flag;
807 cred = p->p_ucred;
808 if (cred) {
809 kp->ki_uid = cred->cr_uid;
810 kp->ki_ruid = cred->cr_ruid;
811 kp->ki_svuid = cred->cr_svuid;
812 kp->ki_cr_flags = cred->cr_flags;
813 /* XXX bde doesn't like KI_NGROUPS */
814 if (cred->cr_ngroups > KI_NGROUPS) {
815 kp->ki_ngroups = KI_NGROUPS;
816 kp->ki_cr_flags |= KI_CRF_GRP_OVERFLOW;
817 } else
818 kp->ki_ngroups = cred->cr_ngroups;
819 bcopy(cred->cr_groups, kp->ki_groups,
820 kp->ki_ngroups * sizeof(gid_t));
821 kp->ki_rgid = cred->cr_rgid;
822 kp->ki_svgid = cred->cr_svgid;
823 /* If jailed(cred), emulate the old P_JAILED flag. */
824 if (jailed(cred)) {
825 kp->ki_flag |= P_JAILED;
826 /* If inside the jail, use 0 as a jail ID. */
827 if (cred->cr_prison != curthread->td_ucred->cr_prison)
828 kp->ki_jid = cred->cr_prison->pr_id;
829 }
830 }
831 ps = p->p_sigacts;
832 if (ps) {
833 mtx_lock(&ps->ps_mtx);
834 kp->ki_sigignore = ps->ps_sigignore;
835 kp->ki_sigcatch = ps->ps_sigcatch;
836 mtx_unlock(&ps->ps_mtx);
837 }
838 if (p->p_state != PRS_NEW &&
839 p->p_state != PRS_ZOMBIE &&
840 p->p_vmspace != NULL) {
841 struct vmspace *vm = p->p_vmspace;
842
843 kp->ki_size = vm->vm_map.size;
844 kp->ki_rssize = vmspace_resident_count(vm); /*XXX*/
845 FOREACH_THREAD_IN_PROC(p, td0) {
846 if (!TD_IS_SWAPPED(td0))
847 kp->ki_rssize += td0->td_kstack_pages;
848 }
849 kp->ki_swrss = vm->vm_swrss;
850 kp->ki_tsize = vm->vm_tsize;
851 kp->ki_dsize = vm->vm_dsize;
852 kp->ki_ssize = vm->vm_ssize;
853 } else if (p->p_state == PRS_ZOMBIE)
854 kp->ki_stat = SZOMB;
855 if (kp->ki_flag & P_INMEM)
856 kp->ki_sflag = PS_INMEM;
857 else
858 kp->ki_sflag = 0;
859 /* Calculate legacy swtime as seconds since 'swtick'. */
860 kp->ki_swtime = (ticks - p->p_swtick) / hz;
861 kp->ki_pid = p->p_pid;
862 kp->ki_nice = p->p_nice;
863 PROC_SLOCK(p);
864 rufetch(p, &kp->ki_rusage);
865 kp->ki_runtime = cputick2usec(p->p_rux.rux_runtime);
866 PROC_SUNLOCK(p);
867 if ((p->p_flag & P_INMEM) && p->p_stats != NULL) {
868 kp->ki_start = p->p_stats->p_start;
869 timevaladd(&kp->ki_start, &boottime);
870 PROC_SLOCK(p);
871 calcru(p, &kp->ki_rusage.ru_utime, &kp->ki_rusage.ru_stime);
872 PROC_SUNLOCK(p);
873 calccru(p, &kp->ki_childutime, &kp->ki_childstime);
874
875 /* Some callers want child-times in a single value */
876 kp->ki_childtime = kp->ki_childstime;
877 timevaladd(&kp->ki_childtime, &kp->ki_childutime);
878 }
879
880 FOREACH_THREAD_IN_PROC(p, td0)
881 kp->ki_cow += td0->td_cow;
882
883 tp = NULL;
884 if (p->p_pgrp) {
885 kp->ki_pgid = p->p_pgrp->pg_id;
886 kp->ki_jobc = p->p_pgrp->pg_jobc;
887 sp = p->p_pgrp->pg_session;
888
889 if (sp != NULL) {
890 kp->ki_sid = sp->s_sid;
891 SESS_LOCK(sp);
892 strlcpy(kp->ki_login, sp->s_login,
893 sizeof(kp->ki_login));
894 if (sp->s_ttyvp)
895 kp->ki_kiflag |= KI_CTTY;
896 if (SESS_LEADER(p))
897 kp->ki_kiflag |= KI_SLEADER;
898 /* XXX proctree_lock */
899 tp = sp->s_ttyp;
900 SESS_UNLOCK(sp);
901 }
902 }
903 if ((p->p_flag & P_CONTROLT) && tp != NULL) {
904 kp->ki_tdev = tty_udev(tp);
905 kp->ki_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID;
906 if (tp->t_session)
907 kp->ki_tsid = tp->t_session->s_sid;
908 } else
909 kp->ki_tdev = NODEV;
910 if (p->p_comm[0] != '\0')
911 strlcpy(kp->ki_comm, p->p_comm, sizeof(kp->ki_comm));
912 if (p->p_sysent && p->p_sysent->sv_name != NULL &&
913 p->p_sysent->sv_name[0] != '\0')
914 strlcpy(kp->ki_emul, p->p_sysent->sv_name, sizeof(kp->ki_emul));
915 kp->ki_siglist = p->p_siglist;
916 kp->ki_xstat = p->p_xstat;
917 kp->ki_acflag = p->p_acflag;
918 kp->ki_lock = p->p_lock;
919 if (p->p_pptr)
920 kp->ki_ppid = p->p_pptr->p_pid;
921 }
922
923 /*
924 * Fill in information that is thread specific. Must be called with
925 * target process locked. If 'preferthread' is set, overwrite certain
926 * process-related fields that are maintained for both threads and
927 * processes.
928 */
929 static void
930 fill_kinfo_thread(struct thread *td, struct kinfo_proc *kp, int preferthread)
931 {
932 struct proc *p;
933
934 p = td->td_proc;
935 kp->ki_tdaddr = td;
936 PROC_LOCK_ASSERT(p, MA_OWNED);
937
938 thread_lock(td);
939 if (td->td_wmesg != NULL)
940 strlcpy(kp->ki_wmesg, td->td_wmesg, sizeof(kp->ki_wmesg));
941 else
942 bzero(kp->ki_wmesg, sizeof(kp->ki_wmesg));
943 strlcpy(kp->ki_ocomm, td->td_name, sizeof(kp->ki_ocomm));
944 if (TD_ON_LOCK(td)) {
945 kp->ki_kiflag |= KI_LOCKBLOCK;
946 strlcpy(kp->ki_lockname, td->td_lockname,
947 sizeof(kp->ki_lockname));
948 } else {
949 kp->ki_kiflag &= ~KI_LOCKBLOCK;
950 bzero(kp->ki_lockname, sizeof(kp->ki_lockname));
951 }
952
953 if (p->p_state == PRS_NORMAL) { /* approximate. */
954 if (TD_ON_RUNQ(td) ||
955 TD_CAN_RUN(td) ||
956 TD_IS_RUNNING(td)) {
957 kp->ki_stat = SRUN;
958 } else if (P_SHOULDSTOP(p)) {
959 kp->ki_stat = SSTOP;
960 } else if (TD_IS_SLEEPING(td)) {
961 kp->ki_stat = SSLEEP;
962 } else if (TD_ON_LOCK(td)) {
963 kp->ki_stat = SLOCK;
964 } else {
965 kp->ki_stat = SWAIT;
966 }
967 } else if (p->p_state == PRS_ZOMBIE) {
968 kp->ki_stat = SZOMB;
969 } else {
970 kp->ki_stat = SIDL;
971 }
972
973 /* Things in the thread */
974 kp->ki_wchan = td->td_wchan;
975 kp->ki_pri.pri_level = td->td_priority;
976 kp->ki_pri.pri_native = td->td_base_pri;
977 kp->ki_lastcpu = td->td_lastcpu;
978 kp->ki_oncpu = td->td_oncpu;
979 kp->ki_tdflags = td->td_flags;
980 kp->ki_tid = td->td_tid;
981 kp->ki_numthreads = p->p_numthreads;
982 kp->ki_pcb = td->td_pcb;
983 kp->ki_kstack = (void *)td->td_kstack;
984 kp->ki_slptime = (ticks - td->td_slptick) / hz;
985 kp->ki_pri.pri_class = td->td_pri_class;
986 kp->ki_pri.pri_user = td->td_user_pri;
987
988 if (preferthread) {
989 kp->ki_runtime = cputick2usec(td->td_rux.rux_runtime);
990 kp->ki_pctcpu = sched_pctcpu(td);
991 kp->ki_estcpu = td->td_estcpu;
992 kp->ki_cow = td->td_cow;
993 }
994
995 /* We can't get this anymore but ps etc never used it anyway. */
996 kp->ki_rqindex = 0;
997
998 if (preferthread)
999 kp->ki_siglist = td->td_siglist;
1000 kp->ki_sigmask = td->td_sigmask;
1001 thread_unlock(td);
1002 }
1003
1004 /*
1005 * Fill in a kinfo_proc structure for the specified process.
1006 * Must be called with the target process locked.
1007 */
1008 void
1009 fill_kinfo_proc(struct proc *p, struct kinfo_proc *kp)
1010 {
1011
1012 MPASS(FIRST_THREAD_IN_PROC(p) != NULL);
1013
1014 fill_kinfo_proc_only(p, kp);
1015 fill_kinfo_thread(FIRST_THREAD_IN_PROC(p), kp, 0);
1016 fill_kinfo_aggregate(p, kp);
1017 }
1018
1019 struct pstats *
1020 pstats_alloc(void)
1021 {
1022
1023 return (malloc(sizeof(struct pstats), M_SUBPROC, M_ZERO|M_WAITOK));
1024 }
1025
1026 /*
1027 * Copy parts of p_stats; zero the rest of p_stats (statistics).
1028 */
1029 void
1030 pstats_fork(struct pstats *src, struct pstats *dst)
1031 {
1032
1033 bzero(&dst->pstat_startzero,
1034 __rangeof(struct pstats, pstat_startzero, pstat_endzero));
1035 bcopy(&src->pstat_startcopy, &dst->pstat_startcopy,
1036 __rangeof(struct pstats, pstat_startcopy, pstat_endcopy));
1037 }
1038
1039 void
1040 pstats_free(struct pstats *ps)
1041 {
1042
1043 free(ps, M_SUBPROC);
1044 }
1045
1046 /*
1047 * Locate a zombie process by number
1048 */
1049 struct proc *
1050 zpfind(pid_t pid)
1051 {
1052 struct proc *p;
1053
1054 sx_slock(&allproc_lock);
1055 LIST_FOREACH(p, &zombproc, p_list)
1056 if (p->p_pid == pid) {
1057 PROC_LOCK(p);
1058 break;
1059 }
1060 sx_sunlock(&allproc_lock);
1061 return (p);
1062 }
1063
1064 #define KERN_PROC_ZOMBMASK 0x3
1065 #define KERN_PROC_NOTHREADS 0x4
1066
1067 #ifdef COMPAT_FREEBSD32
1068
1069 /*
1070 * This function is typically used to copy out the kernel address, so
1071 * it can be replaced by assignment of zero.
1072 */
1073 static inline uint32_t
1074 ptr32_trim(void *ptr)
1075 {
1076 uintptr_t uptr;
1077
1078 uptr = (uintptr_t)ptr;
1079 return ((uptr > UINT_MAX) ? 0 : uptr);
1080 }
1081
1082 #define PTRTRIM_CP(src,dst,fld) \
1083 do { (dst).fld = ptr32_trim((src).fld); } while (0)
1084
1085 static void
1086 freebsd32_kinfo_proc_out(const struct kinfo_proc *ki, struct kinfo_proc32 *ki32)
1087 {
1088 int i;
1089
1090 bzero(ki32, sizeof(struct kinfo_proc32));
1091 ki32->ki_structsize = sizeof(struct kinfo_proc32);
1092 CP(*ki, *ki32, ki_layout);
1093 PTRTRIM_CP(*ki, *ki32, ki_args);
1094 PTRTRIM_CP(*ki, *ki32, ki_paddr);
1095 PTRTRIM_CP(*ki, *ki32, ki_addr);
1096 PTRTRIM_CP(*ki, *ki32, ki_tracep);
1097 PTRTRIM_CP(*ki, *ki32, ki_textvp);
1098 PTRTRIM_CP(*ki, *ki32, ki_fd);
1099 PTRTRIM_CP(*ki, *ki32, ki_vmspace);
1100 PTRTRIM_CP(*ki, *ki32, ki_wchan);
1101 CP(*ki, *ki32, ki_pid);
1102 CP(*ki, *ki32, ki_ppid);
1103 CP(*ki, *ki32, ki_pgid);
1104 CP(*ki, *ki32, ki_tpgid);
1105 CP(*ki, *ki32, ki_sid);
1106 CP(*ki, *ki32, ki_tsid);
1107 CP(*ki, *ki32, ki_jobc);
1108 CP(*ki, *ki32, ki_tdev);
1109 CP(*ki, *ki32, ki_siglist);
1110 CP(*ki, *ki32, ki_sigmask);
1111 CP(*ki, *ki32, ki_sigignore);
1112 CP(*ki, *ki32, ki_sigcatch);
1113 CP(*ki, *ki32, ki_uid);
1114 CP(*ki, *ki32, ki_ruid);
1115 CP(*ki, *ki32, ki_svuid);
1116 CP(*ki, *ki32, ki_rgid);
1117 CP(*ki, *ki32, ki_svgid);
1118 CP(*ki, *ki32, ki_ngroups);
1119 for (i = 0; i < KI_NGROUPS; i++)
1120 CP(*ki, *ki32, ki_groups[i]);
1121 CP(*ki, *ki32, ki_size);
1122 CP(*ki, *ki32, ki_rssize);
1123 CP(*ki, *ki32, ki_swrss);
1124 CP(*ki, *ki32, ki_tsize);
1125 CP(*ki, *ki32, ki_dsize);
1126 CP(*ki, *ki32, ki_ssize);
1127 CP(*ki, *ki32, ki_xstat);
1128 CP(*ki, *ki32, ki_acflag);
1129 CP(*ki, *ki32, ki_pctcpu);
1130 CP(*ki, *ki32, ki_estcpu);
1131 CP(*ki, *ki32, ki_slptime);
1132 CP(*ki, *ki32, ki_swtime);
1133 CP(*ki, *ki32, ki_cow);
1134 CP(*ki, *ki32, ki_runtime);
1135 TV_CP(*ki, *ki32, ki_start);
1136 TV_CP(*ki, *ki32, ki_childtime);
1137 CP(*ki, *ki32, ki_flag);
1138 CP(*ki, *ki32, ki_kiflag);
1139 CP(*ki, *ki32, ki_traceflag);
1140 CP(*ki, *ki32, ki_stat);
1141 CP(*ki, *ki32, ki_nice);
1142 CP(*ki, *ki32, ki_lock);
1143 CP(*ki, *ki32, ki_rqindex);
1144 CP(*ki, *ki32, ki_oncpu);
1145 CP(*ki, *ki32, ki_lastcpu);
1146 bcopy(ki->ki_ocomm, ki32->ki_ocomm, OCOMMLEN + 1);
1147 bcopy(ki->ki_wmesg, ki32->ki_wmesg, WMESGLEN + 1);
1148 bcopy(ki->ki_login, ki32->ki_login, LOGNAMELEN + 1);
1149 bcopy(ki->ki_lockname, ki32->ki_lockname, LOCKNAMELEN + 1);
1150 bcopy(ki->ki_comm, ki32->ki_comm, COMMLEN + 1);
1151 bcopy(ki->ki_emul, ki32->ki_emul, KI_EMULNAMELEN + 1);
1152 CP(*ki, *ki32, ki_cr_flags);
1153 CP(*ki, *ki32, ki_jid);
1154 CP(*ki, *ki32, ki_numthreads);
1155 CP(*ki, *ki32, ki_tid);
1156 CP(*ki, *ki32, ki_pri);
1157 freebsd32_rusage_out(&ki->ki_rusage, &ki32->ki_rusage);
1158 freebsd32_rusage_out(&ki->ki_rusage_ch, &ki32->ki_rusage_ch);
1159 PTRTRIM_CP(*ki, *ki32, ki_pcb);
1160 PTRTRIM_CP(*ki, *ki32, ki_kstack);
1161 PTRTRIM_CP(*ki, *ki32, ki_udata);
1162 CP(*ki, *ki32, ki_sflag);
1163 CP(*ki, *ki32, ki_tdflags);
1164 }
1165
1166 static int
1167 sysctl_out_proc_copyout(struct kinfo_proc *ki, struct sysctl_req *req)
1168 {
1169 struct kinfo_proc32 ki32;
1170 int error;
1171
1172 if (req->flags & SCTL_MASK32) {
1173 freebsd32_kinfo_proc_out(ki, &ki32);
1174 error = SYSCTL_OUT(req, &ki32, sizeof(struct kinfo_proc32));
1175 } else
1176 error = SYSCTL_OUT(req, ki, sizeof(struct kinfo_proc));
1177 return (error);
1178 }
1179 #else
1180 static int
1181 sysctl_out_proc_copyout(struct kinfo_proc *ki, struct sysctl_req *req)
1182 {
1183
1184 return (SYSCTL_OUT(req, ki, sizeof(struct kinfo_proc)));
1185 }
1186 #endif
1187
1188 /*
1189 * Must be called with the process locked and will return with it unlocked.
1190 */
1191 static int
1192 sysctl_out_proc(struct proc *p, struct sysctl_req *req, int flags)
1193 {
1194 struct thread *td;
1195 struct kinfo_proc kinfo_proc;
1196 int error = 0;
1197 struct proc *np;
1198 pid_t pid = p->p_pid;
1199
1200 PROC_LOCK_ASSERT(p, MA_OWNED);
1201 MPASS(FIRST_THREAD_IN_PROC(p) != NULL);
1202
1203 fill_kinfo_proc(p, &kinfo_proc);
1204 if (flags & KERN_PROC_NOTHREADS)
1205 error = sysctl_out_proc_copyout(&kinfo_proc, req);
1206 else {
1207 FOREACH_THREAD_IN_PROC(p, td) {
1208 fill_kinfo_thread(td, &kinfo_proc, 1);
1209 error = sysctl_out_proc_copyout(&kinfo_proc, req);
1210 if (error)
1211 break;
1212 }
1213 }
1214 PROC_UNLOCK(p);
1215 if (error)
1216 return (error);
1217 if (flags & KERN_PROC_ZOMBMASK)
1218 np = zpfind(pid);
1219 else {
1220 if (pid == 0)
1221 return (0);
1222 np = pfind(pid);
1223 }
1224 if (np == NULL)
1225 return (ESRCH);
1226 if (np != p) {
1227 PROC_UNLOCK(np);
1228 return (ESRCH);
1229 }
1230 PROC_UNLOCK(np);
1231 return (0);
1232 }
1233
1234 static int
1235 sysctl_kern_proc(SYSCTL_HANDLER_ARGS)
1236 {
1237 int *name = (int*) arg1;
1238 u_int namelen = arg2;
1239 struct proc *p;
1240 int flags, doingzomb, oid_number;
1241 int error = 0;
1242
1243 oid_number = oidp->oid_number;
1244 if (oid_number != KERN_PROC_ALL &&
1245 (oid_number & KERN_PROC_INC_THREAD) == 0)
1246 flags = KERN_PROC_NOTHREADS;
1247 else {
1248 flags = 0;
1249 oid_number &= ~KERN_PROC_INC_THREAD;
1250 }
1251 if (oid_number == KERN_PROC_PID) {
1252 if (namelen != 1)
1253 return (EINVAL);
1254 error = sysctl_wire_old_buffer(req, 0);
1255 if (error)
1256 return (error);
1257 error = pget((pid_t)name[0], PGET_CANSEE, &p);
1258 if (error != 0)
1259 return (error);
1260 error = sysctl_out_proc(p, req, flags);
1261 return (error);
1262 }
1263
1264 switch (oid_number) {
1265 case KERN_PROC_ALL:
1266 if (namelen != 0)
1267 return (EINVAL);
1268 break;
1269 case KERN_PROC_PROC:
1270 if (namelen != 0 && namelen != 1)
1271 return (EINVAL);
1272 break;
1273 default:
1274 if (namelen != 1)
1275 return (EINVAL);
1276 break;
1277 }
1278
1279 if (!req->oldptr) {
1280 /* overestimate by 5 procs */
1281 error = SYSCTL_OUT(req, 0, sizeof (struct kinfo_proc) * 5);
1282 if (error)
1283 return (error);
1284 }
1285 error = sysctl_wire_old_buffer(req, 0);
1286 if (error != 0)
1287 return (error);
1288 sx_slock(&allproc_lock);
1289 for (doingzomb=0 ; doingzomb < 2 ; doingzomb++) {
1290 if (!doingzomb)
1291 p = LIST_FIRST(&allproc);
1292 else
1293 p = LIST_FIRST(&zombproc);
1294 for (; p != 0; p = LIST_NEXT(p, p_list)) {
1295 /*
1296 * Skip embryonic processes.
1297 */
1298 PROC_LOCK(p);
1299 if (p->p_state == PRS_NEW) {
1300 PROC_UNLOCK(p);
1301 continue;
1302 }
1303 KASSERT(p->p_ucred != NULL,
1304 ("process credential is NULL for non-NEW proc"));
1305 /*
1306 * Show a user only appropriate processes.
1307 */
1308 if (p_cansee(curthread, p)) {
1309 PROC_UNLOCK(p);
1310 continue;
1311 }
1312 /*
1313 * TODO - make more efficient (see notes below).
1314 * do by session.
1315 */
1316 switch (oid_number) {
1317
1318 case KERN_PROC_GID:
1319 if (p->p_ucred->cr_gid != (gid_t)name[0]) {
1320 PROC_UNLOCK(p);
1321 continue;
1322 }
1323 break;
1324
1325 case KERN_PROC_PGRP:
1326 /* could do this by traversing pgrp */
1327 if (p->p_pgrp == NULL ||
1328 p->p_pgrp->pg_id != (pid_t)name[0]) {
1329 PROC_UNLOCK(p);
1330 continue;
1331 }
1332 break;
1333
1334 case KERN_PROC_RGID:
1335 if (p->p_ucred->cr_rgid != (gid_t)name[0]) {
1336 PROC_UNLOCK(p);
1337 continue;
1338 }
1339 break;
1340
1341 case KERN_PROC_SESSION:
1342 if (p->p_session == NULL ||
1343 p->p_session->s_sid != (pid_t)name[0]) {
1344 PROC_UNLOCK(p);
1345 continue;
1346 }
1347 break;
1348
1349 case KERN_PROC_TTY:
1350 if ((p->p_flag & P_CONTROLT) == 0 ||
1351 p->p_session == NULL) {
1352 PROC_UNLOCK(p);
1353 continue;
1354 }
1355 /* XXX proctree_lock */
1356 SESS_LOCK(p->p_session);
1357 if (p->p_session->s_ttyp == NULL ||
1358 tty_udev(p->p_session->s_ttyp) !=
1359 (dev_t)name[0]) {
1360 SESS_UNLOCK(p->p_session);
1361 PROC_UNLOCK(p);
1362 continue;
1363 }
1364 SESS_UNLOCK(p->p_session);
1365 break;
1366
1367 case KERN_PROC_UID:
1368 if (p->p_ucred->cr_uid != (uid_t)name[0]) {
1369 PROC_UNLOCK(p);
1370 continue;
1371 }
1372 break;
1373
1374 case KERN_PROC_RUID:
1375 if (p->p_ucred->cr_ruid != (uid_t)name[0]) {
1376 PROC_UNLOCK(p);
1377 continue;
1378 }
1379 break;
1380
1381 case KERN_PROC_PROC:
1382 break;
1383
1384 default:
1385 break;
1386
1387 }
1388
1389 error = sysctl_out_proc(p, req, flags | doingzomb);
1390 if (error) {
1391 sx_sunlock(&allproc_lock);
1392 return (error);
1393 }
1394 }
1395 }
1396 sx_sunlock(&allproc_lock);
1397 return (0);
1398 }
1399
1400 struct pargs *
1401 pargs_alloc(int len)
1402 {
1403 struct pargs *pa;
1404
1405 pa = malloc(sizeof(struct pargs) + len, M_PARGS,
1406 M_WAITOK);
1407 refcount_init(&pa->ar_ref, 1);
1408 pa->ar_length = len;
1409 return (pa);
1410 }
1411
1412 static void
1413 pargs_free(struct pargs *pa)
1414 {
1415
1416 free(pa, M_PARGS);
1417 }
1418
1419 void
1420 pargs_hold(struct pargs *pa)
1421 {
1422
1423 if (pa == NULL)
1424 return;
1425 refcount_acquire(&pa->ar_ref);
1426 }
1427
1428 void
1429 pargs_drop(struct pargs *pa)
1430 {
1431
1432 if (pa == NULL)
1433 return;
1434 if (refcount_release(&pa->ar_ref))
1435 pargs_free(pa);
1436 }
1437
1438 /*
1439 * This sysctl allows a process to retrieve the argument list or process
1440 * title for another process without groping around in the address space
1441 * of the other process. It also allow a process to set its own "process
1442 * title to a string of its own choice.
1443 */
1444 static int
1445 sysctl_kern_proc_args(SYSCTL_HANDLER_ARGS)
1446 {
1447 int *name = (int*) arg1;
1448 u_int namelen = arg2;
1449 struct pargs *newpa, *pa;
1450 struct proc *p;
1451 int flags, error = 0;
1452
1453 if (namelen != 1)
1454 return (EINVAL);
1455
1456 flags = PGET_CANSEE;
1457 if (req->newptr != NULL)
1458 flags |= PGET_ISCURRENT;
1459 error = pget((pid_t)name[0], flags, &p);
1460 if (error)
1461 return (error);
1462
1463 pa = p->p_args;
1464 pargs_hold(pa);
1465 PROC_UNLOCK(p);
1466 if (pa != NULL)
1467 error = SYSCTL_OUT(req, pa->ar_args, pa->ar_length);
1468 pargs_drop(pa);
1469 if (error != 0 || req->newptr == NULL)
1470 return (error);
1471
1472 if (req->newlen + sizeof(struct pargs) > ps_arg_cache_limit)
1473 return (ENOMEM);
1474 newpa = pargs_alloc(req->newlen);
1475 error = SYSCTL_IN(req, newpa->ar_args, req->newlen);
1476 if (error != 0) {
1477 pargs_free(newpa);
1478 return (error);
1479 }
1480 PROC_LOCK(p);
1481 pa = p->p_args;
1482 p->p_args = newpa;
1483 PROC_UNLOCK(p);
1484 pargs_drop(pa);
1485 return (0);
1486 }
1487
1488 /*
1489 * This sysctl allows a process to retrieve the path of the executable for
1490 * itself or another process.
1491 */
1492 static int
1493 sysctl_kern_proc_pathname(SYSCTL_HANDLER_ARGS)
1494 {
1495 pid_t *pidp = (pid_t *)arg1;
1496 unsigned int arglen = arg2;
1497 struct proc *p;
1498 struct vnode *vp;
1499 char *retbuf, *freebuf;
1500 int error, vfslocked;
1501
1502 if (arglen != 1)
1503 return (EINVAL);
1504 if (*pidp == -1) { /* -1 means this process */
1505 p = req->td->td_proc;
1506 } else {
1507 error = pget(*pidp, PGET_CANSEE, &p);
1508 if (error != 0)
1509 return (error);
1510 }
1511
1512 vp = p->p_textvp;
1513 if (vp == NULL) {
1514 if (*pidp != -1)
1515 PROC_UNLOCK(p);
1516 return (0);
1517 }
1518 vref(vp);
1519 if (*pidp != -1)
1520 PROC_UNLOCK(p);
1521 error = vn_fullpath(req->td, vp, &retbuf, &freebuf);
1522 vfslocked = VFS_LOCK_GIANT(vp->v_mount);
1523 vrele(vp);
1524 VFS_UNLOCK_GIANT(vfslocked);
1525 if (error)
1526 return (error);
1527 error = SYSCTL_OUT(req, retbuf, strlen(retbuf) + 1);
1528 free(freebuf, M_TEMP);
1529 return (error);
1530 }
1531
1532 static int
1533 sysctl_kern_proc_sv_name(SYSCTL_HANDLER_ARGS)
1534 {
1535 struct proc *p;
1536 char *sv_name;
1537 int *name;
1538 int namelen;
1539 int error;
1540
1541 namelen = arg2;
1542 if (namelen != 1)
1543 return (EINVAL);
1544
1545 name = (int *)arg1;
1546 error = pget((pid_t)name[0], PGET_CANSEE, &p);
1547 if (error != 0)
1548 return (error);
1549 sv_name = p->p_sysent->sv_name;
1550 PROC_UNLOCK(p);
1551 return (sysctl_handle_string(oidp, sv_name, 0, req));
1552 }
1553
1554 #ifdef KINFO_OVMENTRY_SIZE
1555 CTASSERT(sizeof(struct kinfo_ovmentry) == KINFO_OVMENTRY_SIZE);
1556 #endif
1557
1558 #ifdef COMPAT_FREEBSD7
1559 static int
1560 sysctl_kern_proc_ovmmap(SYSCTL_HANDLER_ARGS)
1561 {
1562 vm_map_entry_t entry, tmp_entry;
1563 unsigned int last_timestamp;
1564 char *fullpath, *freepath;
1565 struct kinfo_ovmentry *kve;
1566 struct vattr va;
1567 struct ucred *cred;
1568 int error, *name;
1569 struct vnode *vp;
1570 struct proc *p;
1571 vm_map_t map;
1572 struct vmspace *vm;
1573
1574 name = (int *)arg1;
1575 error = pget((pid_t)name[0], PGET_WANTREAD, &p);
1576 if (error != 0)
1577 return (error);
1578 vm = vmspace_acquire_ref(p);
1579 if (vm == NULL) {
1580 PRELE(p);
1581 return (ESRCH);
1582 }
1583 kve = malloc(sizeof(*kve), M_TEMP, M_WAITOK);
1584
1585 map = &p->p_vmspace->vm_map; /* XXXRW: More locking required? */
1586 vm_map_lock_read(map);
1587 for (entry = map->header.next; entry != &map->header;
1588 entry = entry->next) {
1589 vm_object_t obj, tobj, lobj;
1590 vm_offset_t addr;
1591 int vfslocked;
1592
1593 if (entry->eflags & MAP_ENTRY_IS_SUB_MAP)
1594 continue;
1595
1596 bzero(kve, sizeof(*kve));
1597 kve->kve_structsize = sizeof(*kve);
1598
1599 kve->kve_private_resident = 0;
1600 obj = entry->object.vm_object;
1601 if (obj != NULL) {
1602 VM_OBJECT_LOCK(obj);
1603 if (obj->shadow_count == 1)
1604 kve->kve_private_resident =
1605 obj->resident_page_count;
1606 }
1607 kve->kve_resident = 0;
1608 addr = entry->start;
1609 while (addr < entry->end) {
1610 if (pmap_extract(map->pmap, addr))
1611 kve->kve_resident++;
1612 addr += PAGE_SIZE;
1613 }
1614
1615 for (lobj = tobj = obj; tobj; tobj = tobj->backing_object) {
1616 if (tobj != obj)
1617 VM_OBJECT_LOCK(tobj);
1618 if (lobj != obj)
1619 VM_OBJECT_UNLOCK(lobj);
1620 lobj = tobj;
1621 }
1622
1623 kve->kve_start = (void*)entry->start;
1624 kve->kve_end = (void*)entry->end;
1625 kve->kve_offset = (off_t)entry->offset;
1626
1627 if (entry->protection & VM_PROT_READ)
1628 kve->kve_protection |= KVME_PROT_READ;
1629 if (entry->protection & VM_PROT_WRITE)
1630 kve->kve_protection |= KVME_PROT_WRITE;
1631 if (entry->protection & VM_PROT_EXECUTE)
1632 kve->kve_protection |= KVME_PROT_EXEC;
1633
1634 if (entry->eflags & MAP_ENTRY_COW)
1635 kve->kve_flags |= KVME_FLAG_COW;
1636 if (entry->eflags & MAP_ENTRY_NEEDS_COPY)
1637 kve->kve_flags |= KVME_FLAG_NEEDS_COPY;
1638 if (entry->eflags & MAP_ENTRY_NOCOREDUMP)
1639 kve->kve_flags |= KVME_FLAG_NOCOREDUMP;
1640
1641 last_timestamp = map->timestamp;
1642 vm_map_unlock_read(map);
1643
1644 kve->kve_fileid = 0;
1645 kve->kve_fsid = 0;
1646 freepath = NULL;
1647 fullpath = "";
1648 if (lobj) {
1649 vp = NULL;
1650 switch (lobj->type) {
1651 case OBJT_DEFAULT:
1652 kve->kve_type = KVME_TYPE_DEFAULT;
1653 break;
1654 case OBJT_VNODE:
1655 kve->kve_type = KVME_TYPE_VNODE;
1656 vp = lobj->handle;
1657 vref(vp);
1658 break;
1659 case OBJT_SWAP:
1660 kve->kve_type = KVME_TYPE_SWAP;
1661 break;
1662 case OBJT_DEVICE:
1663 kve->kve_type = KVME_TYPE_DEVICE;
1664 break;
1665 case OBJT_PHYS:
1666 kve->kve_type = KVME_TYPE_PHYS;
1667 break;
1668 case OBJT_DEAD:
1669 kve->kve_type = KVME_TYPE_DEAD;
1670 break;
1671 case OBJT_SG:
1672 kve->kve_type = KVME_TYPE_SG;
1673 break;
1674 default:
1675 kve->kve_type = KVME_TYPE_UNKNOWN;
1676 break;
1677 }
1678 if (lobj != obj)
1679 VM_OBJECT_UNLOCK(lobj);
1680
1681 kve->kve_ref_count = obj->ref_count;
1682 kve->kve_shadow_count = obj->shadow_count;
1683 VM_OBJECT_UNLOCK(obj);
1684 if (vp != NULL) {
1685 vn_fullpath(curthread, vp, &fullpath,
1686 &freepath);
1687 cred = curthread->td_ucred;
1688 vfslocked = VFS_LOCK_GIANT(vp->v_mount);
1689 vn_lock(vp, LK_SHARED | LK_RETRY);
1690 if (VOP_GETATTR(vp, &va, cred) == 0) {
1691 kve->kve_fileid = va.va_fileid;
1692 kve->kve_fsid = va.va_fsid;
1693 }
1694 vput(vp);
1695 VFS_UNLOCK_GIANT(vfslocked);
1696 }
1697 } else {
1698 kve->kve_type = KVME_TYPE_NONE;
1699 kve->kve_ref_count = 0;
1700 kve->kve_shadow_count = 0;
1701 }
1702
1703 strlcpy(kve->kve_path, fullpath, sizeof(kve->kve_path));
1704 if (freepath != NULL)
1705 free(freepath, M_TEMP);
1706
1707 error = SYSCTL_OUT(req, kve, sizeof(*kve));
1708 vm_map_lock_read(map);
1709 if (error)
1710 break;
1711 if (last_timestamp != map->timestamp) {
1712 vm_map_lookup_entry(map, addr - 1, &tmp_entry);
1713 entry = tmp_entry;
1714 }
1715 }
1716 vm_map_unlock_read(map);
1717 vmspace_free(vm);
1718 PRELE(p);
1719 free(kve, M_TEMP);
1720 return (error);
1721 }
1722 #endif /* COMPAT_FREEBSD7 */
1723
1724 #ifdef KINFO_VMENTRY_SIZE
1725 CTASSERT(sizeof(struct kinfo_vmentry) == KINFO_VMENTRY_SIZE);
1726 #endif
1727
1728 static int
1729 sysctl_kern_proc_vmmap(SYSCTL_HANDLER_ARGS)
1730 {
1731 vm_map_entry_t entry, tmp_entry;
1732 unsigned int last_timestamp;
1733 char *fullpath, *freepath;
1734 struct kinfo_vmentry *kve;
1735 struct vattr va;
1736 struct ucred *cred;
1737 int error, *name;
1738 struct vnode *vp;
1739 struct proc *p;
1740 struct vmspace *vm;
1741 vm_map_t map;
1742
1743 name = (int *)arg1;
1744 error = pget((pid_t)name[0], PGET_WANTREAD, &p);
1745 if (error != 0)
1746 return (error);
1747 vm = vmspace_acquire_ref(p);
1748 if (vm == NULL) {
1749 PRELE(p);
1750 return (ESRCH);
1751 }
1752 kve = malloc(sizeof(*kve), M_TEMP, M_WAITOK);
1753
1754 map = &vm->vm_map; /* XXXRW: More locking required? */
1755 vm_map_lock_read(map);
1756 for (entry = map->header.next; entry != &map->header;
1757 entry = entry->next) {
1758 vm_object_t obj, tobj, lobj;
1759 vm_offset_t addr;
1760 int vfslocked, mincoreinfo;
1761
1762 if (entry->eflags & MAP_ENTRY_IS_SUB_MAP)
1763 continue;
1764
1765 bzero(kve, sizeof(*kve));
1766
1767 kve->kve_private_resident = 0;
1768 obj = entry->object.vm_object;
1769 if (obj != NULL) {
1770 VM_OBJECT_LOCK(obj);
1771 if (obj->shadow_count == 1)
1772 kve->kve_private_resident =
1773 obj->resident_page_count;
1774 }
1775 kve->kve_resident = 0;
1776 addr = entry->start;
1777 while (addr < entry->end) {
1778 mincoreinfo = pmap_mincore(map->pmap, addr);
1779 if (mincoreinfo & MINCORE_INCORE)
1780 kve->kve_resident++;
1781 if (mincoreinfo & MINCORE_SUPER)
1782 kve->kve_flags |= KVME_FLAG_SUPER;
1783 addr += PAGE_SIZE;
1784 }
1785
1786 for (lobj = tobj = obj; tobj; tobj = tobj->backing_object) {
1787 if (tobj != obj)
1788 VM_OBJECT_LOCK(tobj);
1789 if (lobj != obj)
1790 VM_OBJECT_UNLOCK(lobj);
1791 lobj = tobj;
1792 }
1793
1794 kve->kve_start = entry->start;
1795 kve->kve_end = entry->end;
1796 kve->kve_offset = entry->offset;
1797
1798 if (entry->protection & VM_PROT_READ)
1799 kve->kve_protection |= KVME_PROT_READ;
1800 if (entry->protection & VM_PROT_WRITE)
1801 kve->kve_protection |= KVME_PROT_WRITE;
1802 if (entry->protection & VM_PROT_EXECUTE)
1803 kve->kve_protection |= KVME_PROT_EXEC;
1804
1805 if (entry->eflags & MAP_ENTRY_COW)
1806 kve->kve_flags |= KVME_FLAG_COW;
1807 if (entry->eflags & MAP_ENTRY_NEEDS_COPY)
1808 kve->kve_flags |= KVME_FLAG_NEEDS_COPY;
1809 if (entry->eflags & MAP_ENTRY_NOCOREDUMP)
1810 kve->kve_flags |= KVME_FLAG_NOCOREDUMP;
1811
1812 last_timestamp = map->timestamp;
1813 vm_map_unlock_read(map);
1814
1815 kve->kve_fileid = 0;
1816 kve->kve_fsid = 0;
1817 freepath = NULL;
1818 fullpath = "";
1819 if (lobj) {
1820 vp = NULL;
1821 switch (lobj->type) {
1822 case OBJT_DEFAULT:
1823 kve->kve_type = KVME_TYPE_DEFAULT;
1824 break;
1825 case OBJT_VNODE:
1826 kve->kve_type = KVME_TYPE_VNODE;
1827 vp = lobj->handle;
1828 vref(vp);
1829 break;
1830 case OBJT_SWAP:
1831 kve->kve_type = KVME_TYPE_SWAP;
1832 break;
1833 case OBJT_DEVICE:
1834 kve->kve_type = KVME_TYPE_DEVICE;
1835 break;
1836 case OBJT_PHYS:
1837 kve->kve_type = KVME_TYPE_PHYS;
1838 break;
1839 case OBJT_DEAD:
1840 kve->kve_type = KVME_TYPE_DEAD;
1841 break;
1842 case OBJT_SG:
1843 kve->kve_type = KVME_TYPE_SG;
1844 break;
1845 default:
1846 kve->kve_type = KVME_TYPE_UNKNOWN;
1847 break;
1848 }
1849 if (lobj != obj)
1850 VM_OBJECT_UNLOCK(lobj);
1851
1852 kve->kve_ref_count = obj->ref_count;
1853 kve->kve_shadow_count = obj->shadow_count;
1854 VM_OBJECT_UNLOCK(obj);
1855 if (vp != NULL) {
1856 vn_fullpath(curthread, vp, &fullpath,
1857 &freepath);
1858 cred = curthread->td_ucred;
1859 vfslocked = VFS_LOCK_GIANT(vp->v_mount);
1860 vn_lock(vp, LK_SHARED | LK_RETRY);
1861 if (VOP_GETATTR(vp, &va, cred) == 0) {
1862 kve->kve_fileid = va.va_fileid;
1863 kve->kve_fsid = va.va_fsid;
1864 }
1865 vput(vp);
1866 VFS_UNLOCK_GIANT(vfslocked);
1867 }
1868 } else {
1869 kve->kve_type = KVME_TYPE_NONE;
1870 kve->kve_ref_count = 0;
1871 kve->kve_shadow_count = 0;
1872 }
1873
1874 strlcpy(kve->kve_path, fullpath, sizeof(kve->kve_path));
1875 if (freepath != NULL)
1876 free(freepath, M_TEMP);
1877
1878 /* Pack record size down */
1879 kve->kve_structsize = offsetof(struct kinfo_vmentry, kve_path) +
1880 strlen(kve->kve_path) + 1;
1881 kve->kve_structsize = roundup(kve->kve_structsize,
1882 sizeof(uint64_t));
1883 error = SYSCTL_OUT(req, kve, kve->kve_structsize);
1884 vm_map_lock_read(map);
1885 if (error)
1886 break;
1887 if (last_timestamp != map->timestamp) {
1888 vm_map_lookup_entry(map, addr - 1, &tmp_entry);
1889 entry = tmp_entry;
1890 }
1891 }
1892 vm_map_unlock_read(map);
1893 vmspace_free(vm);
1894 PRELE(p);
1895 free(kve, M_TEMP);
1896 return (error);
1897 }
1898
1899 #if defined(STACK) || defined(DDB)
1900 static int
1901 sysctl_kern_proc_kstack(SYSCTL_HANDLER_ARGS)
1902 {
1903 struct kinfo_kstack *kkstp;
1904 int error, i, *name, numthreads;
1905 lwpid_t *lwpidarray;
1906 struct thread *td;
1907 struct stack *st;
1908 struct sbuf sb;
1909 struct proc *p;
1910
1911 name = (int *)arg1;
1912 error = pget((pid_t)name[0], PGET_NOTINEXEC | PGET_WANTREAD, &p);
1913 if (error != 0)
1914 return (error);
1915
1916 kkstp = malloc(sizeof(*kkstp), M_TEMP, M_WAITOK);
1917 st = stack_create();
1918
1919 lwpidarray = NULL;
1920 numthreads = 0;
1921 PROC_LOCK(p);
1922 repeat:
1923 if (numthreads < p->p_numthreads) {
1924 if (lwpidarray != NULL) {
1925 free(lwpidarray, M_TEMP);
1926 lwpidarray = NULL;
1927 }
1928 numthreads = p->p_numthreads;
1929 PROC_UNLOCK(p);
1930 lwpidarray = malloc(sizeof(*lwpidarray) * numthreads, M_TEMP,
1931 M_WAITOK | M_ZERO);
1932 PROC_LOCK(p);
1933 goto repeat;
1934 }
1935 i = 0;
1936
1937 /*
1938 * XXXRW: During the below loop, execve(2) and countless other sorts
1939 * of changes could have taken place. Should we check to see if the
1940 * vmspace has been replaced, or the like, in order to prevent
1941 * giving a snapshot that spans, say, execve(2), with some threads
1942 * before and some after? Among other things, the credentials could
1943 * have changed, in which case the right to extract debug info might
1944 * no longer be assured.
1945 */
1946 FOREACH_THREAD_IN_PROC(p, td) {
1947 KASSERT(i < numthreads,
1948 ("sysctl_kern_proc_kstack: numthreads"));
1949 lwpidarray[i] = td->td_tid;
1950 i++;
1951 }
1952 numthreads = i;
1953 for (i = 0; i < numthreads; i++) {
1954 td = thread_find(p, lwpidarray[i]);
1955 if (td == NULL) {
1956 continue;
1957 }
1958 bzero(kkstp, sizeof(*kkstp));
1959 (void)sbuf_new(&sb, kkstp->kkst_trace,
1960 sizeof(kkstp->kkst_trace), SBUF_FIXEDLEN);
1961 thread_lock(td);
1962 kkstp->kkst_tid = td->td_tid;
1963 if (TD_IS_SWAPPED(td))
1964 kkstp->kkst_state = KKST_STATE_SWAPPED;
1965 else if (TD_IS_RUNNING(td))
1966 kkstp->kkst_state = KKST_STATE_RUNNING;
1967 else {
1968 kkstp->kkst_state = KKST_STATE_STACKOK;
1969 stack_save_td(st, td);
1970 }
1971 thread_unlock(td);
1972 PROC_UNLOCK(p);
1973 stack_sbuf_print(&sb, st);
1974 sbuf_finish(&sb);
1975 sbuf_delete(&sb);
1976 error = SYSCTL_OUT(req, kkstp, sizeof(*kkstp));
1977 PROC_LOCK(p);
1978 if (error)
1979 break;
1980 }
1981 _PRELE(p);
1982 PROC_UNLOCK(p);
1983 if (lwpidarray != NULL)
1984 free(lwpidarray, M_TEMP);
1985 stack_destroy(st);
1986 free(kkstp, M_TEMP);
1987 return (error);
1988 }
1989 #endif
1990
1991 /*
1992 * This sysctl allows a process to retrieve the full list of groups from
1993 * itself or another process.
1994 */
1995 static int
1996 sysctl_kern_proc_groups(SYSCTL_HANDLER_ARGS)
1997 {
1998 pid_t *pidp = (pid_t *)arg1;
1999 unsigned int arglen = arg2;
2000 struct proc *p;
2001 struct ucred *cred;
2002 int error;
2003
2004 if (arglen != 1)
2005 return (EINVAL);
2006 if (*pidp == -1) { /* -1 means this process */
2007 p = req->td->td_proc;
2008 } else {
2009 error = pget(*pidp, PGET_CANSEE, &p);
2010 if (error != 0)
2011 return (error);
2012 }
2013
2014 cred = crhold(p->p_ucred);
2015 if (*pidp != -1)
2016 PROC_UNLOCK(p);
2017
2018 error = SYSCTL_OUT(req, cred->cr_groups,
2019 cred->cr_ngroups * sizeof(gid_t));
2020 crfree(cred);
2021 return (error);
2022 }
2023
2024 /*
2025 * This sysctl allows a process to set and retrieve binary osreldate of
2026 * another process.
2027 */
2028 static int
2029 sysctl_kern_proc_osrel(SYSCTL_HANDLER_ARGS)
2030 {
2031 int *name = (int *)arg1;
2032 u_int namelen = arg2;
2033 struct proc *p;
2034 int flags, error, osrel;
2035
2036 if (namelen != 1)
2037 return (EINVAL);
2038
2039 if (req->newptr != NULL && req->newlen != sizeof(osrel))
2040 return (EINVAL);
2041
2042 flags = PGET_HOLD | PGET_NOTWEXIT;
2043 if (req->newptr != NULL)
2044 flags |= PGET_CANDEBUG;
2045 else
2046 flags |= PGET_CANSEE;
2047 error = pget((pid_t)name[0], flags, &p);
2048 if (error != 0)
2049 return (error);
2050
2051 error = SYSCTL_OUT(req, &p->p_osrel, sizeof(p->p_osrel));
2052 if (error != 0)
2053 goto errout;
2054
2055 if (req->newptr != NULL) {
2056 error = SYSCTL_IN(req, &osrel, sizeof(osrel));
2057 if (error != 0)
2058 goto errout;
2059 if (osrel < 0) {
2060 error = EINVAL;
2061 goto errout;
2062 }
2063 p->p_osrel = osrel;
2064 }
2065 errout:
2066 PRELE(p);
2067 return (error);
2068 }
2069
2070 SYSCTL_NODE(_kern, KERN_PROC, proc, CTLFLAG_RD, 0, "Process table");
2071
2072 SYSCTL_PROC(_kern_proc, KERN_PROC_ALL, all, CTLFLAG_RD|CTLTYPE_STRUCT|
2073 CTLFLAG_MPSAFE, 0, 0, sysctl_kern_proc, "S,proc",
2074 "Return entire process table");
2075
2076 static SYSCTL_NODE(_kern_proc, KERN_PROC_GID, gid, CTLFLAG_RD | CTLFLAG_MPSAFE,
2077 sysctl_kern_proc, "Process table");
2078
2079 static SYSCTL_NODE(_kern_proc, KERN_PROC_PGRP, pgrp, CTLFLAG_RD | CTLFLAG_MPSAFE,
2080 sysctl_kern_proc, "Process table");
2081
2082 static SYSCTL_NODE(_kern_proc, KERN_PROC_RGID, rgid, CTLFLAG_RD | CTLFLAG_MPSAFE,
2083 sysctl_kern_proc, "Process table");
2084
2085 static SYSCTL_NODE(_kern_proc, KERN_PROC_SESSION, sid, CTLFLAG_RD |
2086 CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
2087
2088 static SYSCTL_NODE(_kern_proc, KERN_PROC_TTY, tty, CTLFLAG_RD | CTLFLAG_MPSAFE,
2089 sysctl_kern_proc, "Process table");
2090
2091 static SYSCTL_NODE(_kern_proc, KERN_PROC_UID, uid, CTLFLAG_RD | CTLFLAG_MPSAFE,
2092 sysctl_kern_proc, "Process table");
2093
2094 static SYSCTL_NODE(_kern_proc, KERN_PROC_RUID, ruid, CTLFLAG_RD | CTLFLAG_MPSAFE,
2095 sysctl_kern_proc, "Process table");
2096
2097 static SYSCTL_NODE(_kern_proc, KERN_PROC_PID, pid, CTLFLAG_RD | CTLFLAG_MPSAFE,
2098 sysctl_kern_proc, "Process table");
2099
2100 static SYSCTL_NODE(_kern_proc, KERN_PROC_PROC, proc, CTLFLAG_RD | CTLFLAG_MPSAFE,
2101 sysctl_kern_proc, "Return process table, no threads");
2102
2103 static SYSCTL_NODE(_kern_proc, KERN_PROC_ARGS, args,
2104 CTLFLAG_RW | CTLFLAG_ANYBODY | CTLFLAG_MPSAFE,
2105 sysctl_kern_proc_args, "Process argument list");
2106
2107 static SYSCTL_NODE(_kern_proc, KERN_PROC_PATHNAME, pathname, CTLFLAG_RD |
2108 CTLFLAG_MPSAFE, sysctl_kern_proc_pathname, "Process executable path");
2109
2110 static SYSCTL_NODE(_kern_proc, KERN_PROC_SV_NAME, sv_name, CTLFLAG_RD |
2111 CTLFLAG_MPSAFE, sysctl_kern_proc_sv_name,
2112 "Process syscall vector name (ABI type)");
2113
2114 static SYSCTL_NODE(_kern_proc, (KERN_PROC_GID | KERN_PROC_INC_THREAD), gid_td,
2115 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
2116
2117 static SYSCTL_NODE(_kern_proc, (KERN_PROC_PGRP | KERN_PROC_INC_THREAD), pgrp_td,
2118 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
2119
2120 static SYSCTL_NODE(_kern_proc, (KERN_PROC_RGID | KERN_PROC_INC_THREAD), rgid_td,
2121 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
2122
2123 static SYSCTL_NODE(_kern_proc, (KERN_PROC_SESSION | KERN_PROC_INC_THREAD),
2124 sid_td, CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
2125
2126 static SYSCTL_NODE(_kern_proc, (KERN_PROC_TTY | KERN_PROC_INC_THREAD), tty_td,
2127 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
2128
2129 static SYSCTL_NODE(_kern_proc, (KERN_PROC_UID | KERN_PROC_INC_THREAD), uid_td,
2130 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
2131
2132 static SYSCTL_NODE(_kern_proc, (KERN_PROC_RUID | KERN_PROC_INC_THREAD), ruid_td,
2133 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
2134
2135 static SYSCTL_NODE(_kern_proc, (KERN_PROC_PID | KERN_PROC_INC_THREAD), pid_td,
2136 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
2137
2138 static SYSCTL_NODE(_kern_proc, (KERN_PROC_PROC | KERN_PROC_INC_THREAD), proc_td,
2139 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc,
2140 "Return process table, no threads");
2141
2142 #ifdef COMPAT_FREEBSD7
2143 static SYSCTL_NODE(_kern_proc, KERN_PROC_OVMMAP, ovmmap, CTLFLAG_RD |
2144 CTLFLAG_MPSAFE, sysctl_kern_proc_ovmmap, "Old Process vm map entries");
2145 #endif
2146
2147 static SYSCTL_NODE(_kern_proc, KERN_PROC_VMMAP, vmmap, CTLFLAG_RD |
2148 CTLFLAG_MPSAFE, sysctl_kern_proc_vmmap, "Process vm map entries");
2149
2150 #if defined(STACK) || defined(DDB)
2151 static SYSCTL_NODE(_kern_proc, KERN_PROC_KSTACK, kstack, CTLFLAG_RD |
2152 CTLFLAG_MPSAFE, sysctl_kern_proc_kstack, "Process kernel stacks");
2153 #endif
2154
2155 static SYSCTL_NODE(_kern_proc, KERN_PROC_GROUPS, groups, CTLFLAG_RD |
2156 CTLFLAG_MPSAFE, sysctl_kern_proc_groups, "Process groups");
2157
2158 static SYSCTL_NODE(_kern_proc, KERN_PROC_OSREL, osrel, CTLFLAG_RW |
2159 CTLFLAG_ANYBODY | CTLFLAG_MPSAFE, sysctl_kern_proc_osrel,
2160 "Process binary osreldate");
Cache object: b9abe18ad2887eaea5bb66e892624aad
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