kern_sysctl.c revision 1.150
1 /* $NetBSD: kern_sysctl.c,v 1.150 2003/10/19 01:44:49 simonb Exp $ */ 2 3 /*- 4 * Copyright (c) 1982, 1986, 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Mike Karels at Berkeley Software Design, Inc. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)kern_sysctl.c 8.9 (Berkeley) 5/20/95 35 */ 36 37 /* 38 * sysctl system call. 39 */ 40 41 #include <sys/cdefs.h> 42 __KERNEL_RCSID(0, "$NetBSD: kern_sysctl.c,v 1.150 2003/10/19 01:44:49 simonb Exp $"); 43 44 #include "opt_ddb.h" 45 #include "opt_insecure.h" 46 #include "opt_defcorename.h" 47 #include "opt_multiprocessor.h" 48 #include "opt_pipe.h" 49 #include "opt_posix.h" 50 #include "opt_sysv.h" 51 #include "pty.h" 52 #include "rnd.h" 53 54 #include <sys/param.h> 55 #include <sys/systm.h> 56 #include <sys/kernel.h> 57 #include <sys/buf.h> 58 #include <sys/device.h> 59 #include <sys/disklabel.h> 60 #include <sys/dkstat.h> 61 #include <sys/exec.h> 62 #include <sys/file.h> 63 #include <sys/ioctl.h> 64 #include <sys/malloc.h> 65 #include <sys/mount.h> 66 #include <sys/msgbuf.h> 67 #include <sys/pool.h> 68 #include <sys/proc.h> 69 #include <sys/resource.h> 70 #include <sys/resourcevar.h> 71 #include <sys/sa.h> 72 #include <sys/syscallargs.h> 73 #include <sys/tty.h> 74 #include <sys/unistd.h> 75 #include <sys/vnode.h> 76 #include <sys/socketvar.h> 77 #define __SYSCTL_PRIVATE 78 #include <sys/sysctl.h> 79 #include <sys/lock.h> 80 #include <sys/namei.h> 81 #include <sys/conf.h> 82 83 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 84 #include <sys/ipc.h> 85 #endif 86 #ifdef SYSVMSG 87 #include <sys/msg.h> 88 #endif 89 #ifdef SYSVSEM 90 #include <sys/sem.h> 91 #endif 92 #ifdef SYSVSHM 93 #include <sys/shm.h> 94 #endif 95 96 #include <dev/cons.h> 97 98 #if defined(DDB) 99 #include <ddb/ddbvar.h> 100 #endif 101 102 #ifndef PIPE_SOCKETPAIR 103 #include <sys/pipe.h> 104 #endif 105 106 #if NRND > 0 107 #include <sys/rnd.h> 108 #endif 109 110 #define PTRTOINT64(foo) ((u_int64_t)(uintptr_t)(foo)) 111 112 static int sysctl_file(void *, size_t *); 113 static int sysctl_drivers(void *, size_t *); 114 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 115 static int sysctl_sysvipc(int *, u_int, void *, size_t *); 116 #endif 117 static int sysctl_msgbuf(void *, size_t *); 118 static int sysctl_doeproc(int *, u_int, void *, size_t *); 119 static int sysctl_dolwp(int *, u_int, void *, size_t *); 120 static int sysctl_dotkstat(int *, u_int, void *, size_t *, void *); 121 #ifdef MULTIPROCESSOR 122 static int sysctl_docptime(void *, size_t *, void *); 123 static int sysctl_ncpus(void); 124 #endif 125 static void fill_kproc2(struct proc *, struct kinfo_proc2 *); 126 static void fill_lwp(struct lwp *, struct kinfo_lwp *); 127 static int sysctl_procargs(int *, u_int, void *, size_t *, struct proc *); 128 #if NPTY > 0 129 static int sysctl_pty(void *, size_t *, void *, size_t); 130 #endif 131 132 /* 133 * The `sysctl_memlock' is intended to keep too many processes from 134 * locking down memory by doing sysctls at once. Whether or not this 135 * is really a good idea to worry about it probably a subject of some 136 * debate. 137 */ 138 struct lock sysctl_memlock; 139 140 void 141 sysctl_init(void) 142 { 143 144 lockinit(&sysctl_memlock, PRIBIO|PCATCH, "sysctl", 0, 0); 145 } 146 147 int 148 sys___sysctl(struct lwp *l, void *v, register_t *retval) 149 { 150 struct sys___sysctl_args /* { 151 syscallarg(int *) name; 152 syscallarg(u_int) namelen; 153 syscallarg(void *) old; 154 syscallarg(size_t *) oldlenp; 155 syscallarg(void *) new; 156 syscallarg(size_t) newlen; 157 } */ *uap = v; 158 struct proc *p = l->l_proc; 159 int error; 160 size_t savelen = 0, oldlen = 0; 161 sysctlfn *fn; 162 int name[CTL_MAXNAME]; 163 164 /* 165 * all top-level sysctl names are non-terminal 166 */ 167 if (SCARG(uap, namelen) > CTL_MAXNAME || SCARG(uap, namelen) < 2) 168 return (EINVAL); 169 error = copyin(SCARG(uap, name), &name, 170 SCARG(uap, namelen) * sizeof(int)); 171 if (error) 172 return (error); 173 174 /* 175 * For all but CTL_PROC, must be root to change a value. 176 * For CTL_PROC, must be root, or owner of the proc (and not suid), 177 * this is checked in proc_sysctl() (once we know the targer proc). 178 */ 179 if (SCARG(uap, new) != NULL && name[0] != CTL_PROC && 180 (error = suser(p->p_ucred, &p->p_acflag))) 181 return (error); 182 183 switch (name[0]) { 184 case CTL_KERN: 185 fn = kern_sysctl; 186 break; 187 case CTL_HW: 188 fn = hw_sysctl; 189 break; 190 case CTL_VM: 191 fn = uvm_sysctl; 192 break; 193 case CTL_NET: 194 fn = net_sysctl; 195 break; 196 case CTL_VFS: 197 fn = vfs_sysctl; 198 break; 199 case CTL_MACHDEP: 200 fn = cpu_sysctl; 201 break; 202 #ifdef DEBUG 203 case CTL_DEBUG: 204 fn = debug_sysctl; 205 break; 206 #endif 207 #ifdef DDB 208 case CTL_DDB: 209 fn = ddb_sysctl; 210 break; 211 #endif 212 case CTL_PROC: 213 fn = proc_sysctl; 214 break; 215 216 case CTL_EMUL: 217 fn = emul_sysctl; 218 break; 219 default: 220 return (EOPNOTSUPP); 221 } 222 223 /* 224 * XXX Hey, we wire `old', but what about `new'? 225 */ 226 227 if (SCARG(uap, oldlenp)) { 228 if ((error = copyin(SCARG(uap, oldlenp), &oldlen, 229 sizeof(oldlen)))) 230 return (error); 231 } 232 if (SCARG(uap, old) != NULL) { 233 error = lockmgr(&sysctl_memlock, LK_EXCLUSIVE, NULL); 234 if (error) 235 return (error); 236 error = uvm_vslock(p, SCARG(uap, old), oldlen, VM_PROT_WRITE); 237 if (error) { 238 (void) lockmgr(&sysctl_memlock, LK_RELEASE, NULL); 239 return (error); 240 } 241 savelen = oldlen; 242 } 243 error = (*fn)(name + 1, SCARG(uap, namelen) - 1, SCARG(uap, old), 244 &oldlen, SCARG(uap, new), SCARG(uap, newlen), p); 245 if (SCARG(uap, old) != NULL) { 246 uvm_vsunlock(p, SCARG(uap, old), savelen); 247 (void) lockmgr(&sysctl_memlock, LK_RELEASE, NULL); 248 } 249 if (error) 250 return (error); 251 if (SCARG(uap, oldlenp)) 252 error = copyout(&oldlen, SCARG(uap, oldlenp), sizeof(oldlen)); 253 return (error); 254 } 255 256 /* 257 * Attributes stored in the kernel. 258 */ 259 char hostname[MAXHOSTNAMELEN]; 260 int hostnamelen; 261 262 char domainname[MAXHOSTNAMELEN]; 263 int domainnamelen; 264 265 long hostid; 266 267 #ifdef INSECURE 268 int securelevel = -1; 269 #else 270 int securelevel = 0; 271 #endif 272 273 #ifndef DEFCORENAME 274 #define DEFCORENAME "%n.core" 275 #endif 276 char defcorename[MAXPATHLEN] = DEFCORENAME; 277 278 extern int kern_logsigexit; 279 extern fixpt_t ccpu; 280 extern int forkfsleep; 281 extern int dumponpanic; 282 283 #ifndef MULTIPROCESSOR 284 #define sysctl_ncpus() 1 285 #endif 286 287 #ifdef MULTIPROCESSOR 288 289 #ifndef CPU_INFO_FOREACH 290 #define CPU_INFO_ITERATOR int 291 #define CPU_INFO_FOREACH(cii, ci) cii = 0, ci = curcpu(); ci != NULL; ci = NULL 292 #endif 293 294 static int 295 sysctl_docptime(void *oldp, size_t *oldlenp, void *newp) 296 { 297 u_int64_t cp_time[CPUSTATES]; 298 struct cpu_info *ci; 299 CPU_INFO_ITERATOR cii; 300 int ncpus = sysctl_ncpus(); 301 302 if (*oldlenp == sizeof(cp_time)) { 303 size_t i; 304 305 for (i = 0; i < CPUSTATES; i++) 306 cp_time[i] = 0; 307 308 for (CPU_INFO_FOREACH(cii, ci)) { 309 for (i = 0; i < CPUSTATES; i++) 310 cp_time[i] += ci->ci_schedstate.spc_cp_time[i]; 311 } 312 return sysctl_rdstruct(oldp, oldlenp, newp, 313 cp_time, sizeof(cp_time)); 314 } else if (*oldlenp == sizeof(cp_time) * ncpus) { 315 int error; 316 317 for (CPU_INFO_FOREACH(cii, ci)) { 318 if ((error = sysctl_rdstruct(oldp, oldlenp, newp, 319 ci->ci_schedstate.spc_cp_time, 320 sizeof(ci->ci_schedstate.spc_cp_time))) != 0) 321 return error; 322 oldp = ((char *)oldp) + sizeof(cp_time); 323 } 324 *oldlenp = ncpus * sizeof(cp_time); 325 return 0; 326 } else 327 return EINVAL; 328 } 329 330 static int 331 sysctl_ncpus(void) 332 { 333 struct cpu_info *ci; 334 CPU_INFO_ITERATOR cii; 335 336 int ncpus = 0; 337 for (CPU_INFO_FOREACH(cii, ci)) 338 ncpus++; 339 return (ncpus); 340 } 341 342 #endif 343 344 /* 345 * kernel related system variables. 346 */ 347 int 348 kern_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 349 void *newp, size_t newlen, struct proc *p) 350 { 351 int error, level, inthostid; 352 int old_autonicetime; 353 int old_vnodes; 354 dev_t consdev; 355 #if NRND > 0 356 int v; 357 #endif 358 359 /* All sysctl names at this level, except for a few, are terminal. */ 360 switch (name[0]) { 361 case KERN_PROC: 362 case KERN_PROC2: 363 case KERN_LWP: 364 case KERN_PROF: 365 case KERN_MBUF: 366 case KERN_PROC_ARGS: 367 case KERN_SYSVIPC_INFO: 368 case KERN_PIPE: 369 case KERN_TKSTAT: 370 /* Not terminal. */ 371 break; 372 default: 373 if (namelen != 1) 374 return (ENOTDIR); /* overloaded */ 375 } 376 377 switch (name[0]) { 378 case KERN_OSTYPE: 379 return (sysctl_rdstring(oldp, oldlenp, newp, ostype)); 380 case KERN_OSRELEASE: 381 return (sysctl_rdstring(oldp, oldlenp, newp, osrelease)); 382 case KERN_OSREV: 383 return (sysctl_rdint(oldp, oldlenp, newp, __NetBSD_Version__)); 384 case KERN_VERSION: 385 return (sysctl_rdstring(oldp, oldlenp, newp, version)); 386 case KERN_MAXVNODES: 387 old_vnodes = desiredvnodes; 388 error = sysctl_int(oldp, oldlenp, newp, newlen, &desiredvnodes); 389 if (newp && !error) { 390 if (old_vnodes > desiredvnodes) { 391 error = vfs_drainvnodes(desiredvnodes, p); 392 if (error) { 393 desiredvnodes = old_vnodes; 394 return error; 395 } 396 } 397 vfs_reinit(); 398 nchreinit(); 399 } 400 return (error); 401 case KERN_MAXPROC: 402 { 403 int nmaxproc = maxproc; 404 405 error = sysctl_int(oldp, oldlenp, newp, newlen, &nmaxproc); 406 407 if (!error && newp) { 408 if (nmaxproc < 0 || nmaxproc >= PID_MAX) 409 return (EINVAL); 410 411 #ifdef __HAVE_CPU_MAXPROC 412 if (nmaxproc > cpu_maxproc()) 413 return (EINVAL); 414 #endif 415 maxproc = nmaxproc; 416 } 417 418 return (error); 419 } 420 case KERN_MAXFILES: 421 return (sysctl_int(oldp, oldlenp, newp, newlen, &maxfiles)); 422 case KERN_ARGMAX: 423 return (sysctl_rdint(oldp, oldlenp, newp, ARG_MAX)); 424 case KERN_SECURELVL: 425 level = securelevel; 426 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &level)) || 427 newp == NULL) 428 return (error); 429 if (level < securelevel && p->p_pid != 1) 430 return (EPERM); 431 securelevel = level; 432 return (0); 433 case KERN_HOSTNAME: 434 error = sysctl_string(oldp, oldlenp, newp, newlen, 435 hostname, sizeof(hostname)); 436 if (newp && !error) 437 hostnamelen = newlen; 438 return (error); 439 case KERN_DOMAINNAME: 440 error = sysctl_string(oldp, oldlenp, newp, newlen, 441 domainname, sizeof(domainname)); 442 if (newp && !error) 443 domainnamelen = newlen; 444 return (error); 445 case KERN_HOSTID: 446 inthostid = hostid; /* XXX assumes sizeof long <= sizeof int */ 447 error = sysctl_int(oldp, oldlenp, newp, newlen, &inthostid); 448 if (newp && !error) 449 hostid = inthostid; 450 return (error); 451 case KERN_CLOCKRATE: 452 return (sysctl_clockrate(oldp, oldlenp)); 453 case KERN_BOOTTIME: 454 return (sysctl_rdstruct(oldp, oldlenp, newp, &boottime, 455 sizeof(struct timeval))); 456 case KERN_VNODE: 457 return (sysctl_vnode(oldp, oldlenp, p)); 458 case KERN_PROC: 459 case KERN_PROC2: 460 return (sysctl_doeproc(name, namelen, oldp, oldlenp)); 461 case KERN_LWP: 462 return (sysctl_dolwp(name, namelen, oldp, oldlenp)); 463 case KERN_PROC_ARGS: 464 return (sysctl_procargs(name + 1, namelen - 1, 465 oldp, oldlenp, p)); 466 case KERN_FILE: 467 return (sysctl_file(oldp, oldlenp)); 468 #ifdef GPROF 469 case KERN_PROF: 470 return (sysctl_doprof(name + 1, namelen - 1, oldp, oldlenp, 471 newp, newlen)); 472 #endif 473 case KERN_POSIX1: 474 return (sysctl_rdint(oldp, oldlenp, newp, _POSIX_VERSION)); 475 case KERN_NGROUPS: 476 return (sysctl_rdint(oldp, oldlenp, newp, NGROUPS_MAX)); 477 case KERN_JOB_CONTROL: 478 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 479 case KERN_SAVED_IDS: 480 #ifdef _POSIX_SAVED_IDS 481 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 482 #else 483 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 484 #endif 485 case KERN_MAXPARTITIONS: 486 return (sysctl_rdint(oldp, oldlenp, newp, MAXPARTITIONS)); 487 case KERN_RAWPARTITION: 488 return (sysctl_rdint(oldp, oldlenp, newp, RAW_PART)); 489 #ifdef NTP 490 case KERN_NTPTIME: 491 return (sysctl_ntptime(oldp, oldlenp)); 492 #endif 493 case KERN_AUTONICETIME: 494 old_autonicetime = autonicetime; 495 error = sysctl_int(oldp, oldlenp, newp, newlen, &autonicetime); 496 if (autonicetime < 0) 497 autonicetime = old_autonicetime; 498 return (error); 499 case KERN_AUTONICEVAL: 500 error = sysctl_int(oldp, oldlenp, newp, newlen, &autoniceval); 501 if (autoniceval < PRIO_MIN) 502 autoniceval = PRIO_MIN; 503 if (autoniceval > PRIO_MAX) 504 autoniceval = PRIO_MAX; 505 return (error); 506 case KERN_RTC_OFFSET: 507 return (sysctl_rdint(oldp, oldlenp, newp, rtc_offset)); 508 case KERN_ROOT_DEVICE: 509 return (sysctl_rdstring(oldp, oldlenp, newp, 510 root_device->dv_xname)); 511 case KERN_ROOT_PARTITION: 512 return (sysctl_rdint(oldp, oldlenp, newp, DISKPART(rootdev))); 513 case KERN_MSGBUFSIZE: 514 /* 515 * deal with cases where the message buffer has 516 * become corrupted. 517 */ 518 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 519 msgbufenabled = 0; 520 return (ENXIO); 521 } 522 return (sysctl_rdint(oldp, oldlenp, newp, msgbufp->msg_bufs)); 523 case KERN_FSYNC: 524 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 525 case KERN_SYSVMSG: 526 #ifdef SYSVMSG 527 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 528 #else 529 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 530 #endif 531 case KERN_SYSVSEM: 532 #ifdef SYSVSEM 533 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 534 #else 535 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 536 #endif 537 case KERN_SYSVSHM: 538 #ifdef SYSVSHM 539 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 540 #else 541 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 542 #endif 543 case KERN_DEFCORENAME: 544 if (newp && newlen < 1) 545 return (EINVAL); 546 error = sysctl_string(oldp, oldlenp, newp, newlen, 547 defcorename, sizeof(defcorename)); 548 return (error); 549 case KERN_SYNCHRONIZED_IO: 550 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 551 case KERN_IOV_MAX: 552 return (sysctl_rdint(oldp, oldlenp, newp, IOV_MAX)); 553 case KERN_MBUF: 554 return (sysctl_dombuf(name + 1, namelen - 1, oldp, oldlenp, 555 newp, newlen)); 556 case KERN_MAPPED_FILES: 557 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 558 case KERN_MEMLOCK: 559 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 560 case KERN_MEMLOCK_RANGE: 561 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 562 case KERN_MEMORY_PROTECTION: 563 return (sysctl_rdint(oldp, oldlenp, newp, 1)); 564 case KERN_LOGIN_NAME_MAX: 565 return (sysctl_rdint(oldp, oldlenp, newp, LOGIN_NAME_MAX)); 566 case KERN_LOGSIGEXIT: 567 return (sysctl_int(oldp, oldlenp, newp, newlen, 568 &kern_logsigexit)); 569 case KERN_FSCALE: 570 return (sysctl_rdint(oldp, oldlenp, newp, FSCALE)); 571 case KERN_CCPU: 572 return (sysctl_rdint(oldp, oldlenp, newp, ccpu)); 573 case KERN_CP_TIME: 574 #ifndef MULTIPROCESSOR 575 return (sysctl_rdstruct(oldp, oldlenp, newp, 576 curcpu()->ci_schedstate.spc_cp_time, 577 sizeof(curcpu()->ci_schedstate.spc_cp_time))); 578 #else 579 return (sysctl_docptime(oldp, oldlenp, newp)); 580 #endif 581 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 582 case KERN_SYSVIPC_INFO: 583 return (sysctl_sysvipc(name + 1, namelen - 1, oldp, oldlenp)); 584 #endif 585 case KERN_MSGBUF: 586 return (sysctl_msgbuf(oldp, oldlenp)); 587 case KERN_CONSDEV: 588 if (cn_tab != NULL) 589 consdev = cn_tab->cn_dev; 590 else 591 consdev = NODEV; 592 return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev, 593 sizeof consdev)); 594 #if NPTY > 0 595 case KERN_MAXPTYS: 596 return (sysctl_pty(oldp, oldlenp, newp, newlen)); 597 #endif 598 #ifndef PIPE_SOCKETPAIR 599 case KERN_PIPE: 600 return (sysctl_dopipe(name + 1, namelen - 1, oldp, oldlenp, 601 newp, newlen)); 602 #endif 603 case KERN_MAXPHYS: 604 return (sysctl_rdint(oldp, oldlenp, newp, MAXPHYS)); 605 case KERN_SOMAXKVA: 606 { 607 int new_somaxkva = somaxkva; 608 609 error = sysctl_int(oldp, oldlenp, newp, newlen, &new_somaxkva); 610 if (newp && !error) { 611 if (new_somaxkva < (16 * 1024 * 1024)) /* sanity */ 612 return (EINVAL); 613 somaxkva = new_somaxkva; 614 } 615 return (error); 616 } 617 case KERN_SBMAX: 618 { 619 int new_sbmax = sb_max; 620 621 error = sysctl_int(oldp, oldlenp, newp, newlen, &new_sbmax); 622 if (newp && !error) { 623 if (new_sbmax < (16 * 1024)) /* sanity */ 624 return (EINVAL); 625 sb_max = new_sbmax; 626 } 627 return (error); 628 } 629 case KERN_TKSTAT: 630 return (sysctl_dotkstat(name + 1, namelen - 1, oldp, oldlenp, 631 newp)); 632 case KERN_MONOTONIC_CLOCK: /* XXX _POSIX_VERSION */ 633 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 634 case KERN_URND: 635 #if NRND > 0 636 if (rnd_extract_data(&v, sizeof(v), RND_EXTRACT_ANY) == 637 sizeof(v)) 638 return (sysctl_rdint(oldp, oldlenp, newp, v)); 639 else 640 return (EIO); /*XXX*/ 641 #else 642 return (EOPNOTSUPP); 643 #endif 644 case KERN_LABELSECTOR: 645 return (sysctl_rdint(oldp, oldlenp, newp, LABELSECTOR)); 646 case KERN_LABELOFFSET: 647 return (sysctl_rdint(oldp, oldlenp, newp, LABELOFFSET)); 648 case KERN_FORKFSLEEP: 649 { 650 /* userland sees value in ms, internally is in ticks */ 651 int timo, lsleep = forkfsleep * 1000 / hz; 652 653 error = sysctl_int(oldp, oldlenp, newp, newlen, &lsleep); 654 if (newp && !error) { 655 /* refuse negative values, and overly 'long time' */ 656 if (lsleep < 0 || lsleep > MAXSLP * 1000) 657 return (EINVAL); 658 659 timo = mstohz(lsleep); 660 661 /* if the interval is >0 ms && <1 tick, use 1 tick */ 662 if (lsleep != 0 && timo == 0) 663 forkfsleep = 1; 664 else 665 forkfsleep = timo; 666 } 667 return (error); 668 } 669 case KERN_POSIX_THREADS: /* XXX _POSIX_VERSION */ 670 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 671 case KERN_POSIX_SEMAPHORES: /* XXX _POSIX_VERSION */ 672 #ifdef P1003_1B_SEMAPHORE 673 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 674 #else 675 return (sysctl_rdint(oldp, oldlenp, newp, 0)); 676 #endif 677 case KERN_POSIX_BARRIERS: /* XXX _POSIX_VERSION */ 678 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 679 case KERN_POSIX_TIMERS: /* XXX _POSIX_VERSION */ 680 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 681 case KERN_POSIX_SPIN_LOCKS: /* XXX _POSIX_VERSION */ 682 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 683 case KERN_POSIX_READER_WRITER_LOCKS: /* XXX _POSIX_VERSION */ 684 return (sysctl_rdint(oldp, oldlenp, newp, 200112)); 685 case KERN_DUMP_ON_PANIC: 686 return (sysctl_int(oldp, oldlenp, newp, newlen, &dumponpanic)); 687 688 case KERN_DRIVERS: 689 return (sysctl_drivers(oldp, oldlenp)); 690 691 default: 692 return (EOPNOTSUPP); 693 } 694 /* NOTREACHED */ 695 } 696 697 /* 698 * hardware related system variables. 699 */ 700 int 701 hw_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 702 void *newp, size_t newlen, struct proc *p) 703 { 704 705 /* All sysctl names at this level, except for a few, are terminal. */ 706 switch (name[0]) { 707 case HW_DISKSTATS: 708 /* Not terminal. */ 709 break; 710 default: 711 if (namelen != 1) 712 return (ENOTDIR); /* overloaded */ 713 } 714 715 switch (name[0]) { 716 case HW_MACHINE: 717 return (sysctl_rdstring(oldp, oldlenp, newp, machine)); 718 case HW_MACHINE_ARCH: 719 return (sysctl_rdstring(oldp, oldlenp, newp, machine_arch)); 720 case HW_MODEL: 721 return (sysctl_rdstring(oldp, oldlenp, newp, cpu_model)); 722 case HW_NCPU: 723 return (sysctl_rdint(oldp, oldlenp, newp, sysctl_ncpus())); 724 case HW_BYTEORDER: 725 return (sysctl_rdint(oldp, oldlenp, newp, BYTE_ORDER)); 726 case HW_PHYSMEM: 727 { 728 u_int rval; 729 730 if ((u_int)physmem > (UINT_MAX / PAGE_SIZE)) 731 rval = UINT_MAX; 732 else 733 rval = physmem * PAGE_SIZE; 734 return (sysctl_rdint(oldp, oldlenp, newp, rval)); 735 } 736 case HW_PHYSMEM64: 737 return (sysctl_rdquad(oldp, oldlenp, newp, 738 (u_quad_t)physmem * PAGE_SIZE)); 739 case HW_USERMEM: 740 { 741 u_int rval; 742 743 if ((u_int)(physmem - uvmexp.wired) > (UINT_MAX / PAGE_SIZE)) 744 rval = UINT_MAX; 745 else 746 rval = (physmem - uvmexp.wired) * PAGE_SIZE; 747 return (sysctl_rdint(oldp, oldlenp, newp, rval)); 748 } 749 case HW_USERMEM64: 750 return (sysctl_rdquad(oldp, oldlenp, newp, 751 (u_quad_t)(physmem - uvmexp.wired) * PAGE_SIZE)); 752 case HW_PAGESIZE: 753 return (sysctl_rdint(oldp, oldlenp, newp, PAGE_SIZE)); 754 case HW_ALIGNBYTES: 755 return (sysctl_rdint(oldp, oldlenp, newp, ALIGNBYTES)); 756 case HW_DISKNAMES: 757 return (sysctl_disknames(oldp, oldlenp)); 758 case HW_DISKSTATS: 759 return (sysctl_diskstats(name + 1, namelen - 1, oldp, oldlenp)); 760 case HW_CNMAGIC: { 761 char magic[CNS_LEN]; 762 int error; 763 764 if (oldp) 765 cn_get_magic(magic, CNS_LEN); 766 error = sysctl_string(oldp, oldlenp, newp, newlen, 767 magic, sizeof(magic)); 768 if (newp && !error) { 769 error = cn_set_magic(magic); 770 } 771 return (error); 772 } 773 default: 774 return (EOPNOTSUPP); 775 } 776 /* NOTREACHED */ 777 } 778 779 #ifdef DEBUG 780 /* 781 * Debugging related system variables. 782 */ 783 struct ctldebug /* debug0, */ /* debug1, */ debug2, debug3, debug4; 784 struct ctldebug debug5, debug6, debug7, debug8, debug9; 785 struct ctldebug debug10, debug11, debug12, debug13, debug14; 786 struct ctldebug debug15, debug16, debug17, debug18, debug19; 787 static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = { 788 &debug0, &debug1, &debug2, &debug3, &debug4, 789 &debug5, &debug6, &debug7, &debug8, &debug9, 790 &debug10, &debug11, &debug12, &debug13, &debug14, 791 &debug15, &debug16, &debug17, &debug18, &debug19, 792 }; 793 794 int 795 debug_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 796 void *newp, size_t newlen, struct proc *p) 797 { 798 struct ctldebug *cdp; 799 800 /* all sysctl names at this level are name and field */ 801 if (namelen != 2) 802 return (ENOTDIR); /* overloaded */ 803 if (name[0] < 0 || name[0] >= CTL_DEBUG_MAXID) 804 return (EOPNOTSUPP); 805 cdp = debugvars[name[0]]; 806 if (cdp->debugname == 0) 807 return (EOPNOTSUPP); 808 switch (name[1]) { 809 case CTL_DEBUG_NAME: 810 return (sysctl_rdstring(oldp, oldlenp, newp, cdp->debugname)); 811 case CTL_DEBUG_VALUE: 812 return (sysctl_int(oldp, oldlenp, newp, newlen, cdp->debugvar)); 813 default: 814 return (EOPNOTSUPP); 815 } 816 /* NOTREACHED */ 817 } 818 #endif /* DEBUG */ 819 820 int 821 proc_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 822 void *newp, size_t newlen, struct proc *p) 823 { 824 struct proc *ptmp = NULL; 825 int error = 0; 826 struct rlimit alim; 827 struct plimit *newplim; 828 char *tmps = NULL; 829 size_t len, curlen; 830 u_int i; 831 int si; 832 833 if (namelen < 2) 834 return (EINVAL); 835 836 if (name[0] == PROC_CURPROC) { 837 ptmp = p; 838 } else if ((ptmp = pfind((pid_t)name[0])) == NULL) { 839 return (ESRCH); 840 } else { 841 if (p->p_ucred->cr_uid != 0) { 842 if (p->p_cred->p_ruid != ptmp->p_cred->p_ruid || 843 p->p_cred->p_ruid != ptmp->p_cred->p_svuid) 844 return (EPERM); 845 if (ptmp->p_cred->p_rgid != ptmp->p_cred->p_svgid) 846 return (EPERM); /* sgid proc */ 847 for (i = 0; i < p->p_ucred->cr_ngroups; i++) { 848 if (p->p_ucred->cr_groups[i] == 849 ptmp->p_cred->p_rgid) 850 break; 851 } 852 if (i == p->p_ucred->cr_ngroups) 853 return (EPERM); 854 } 855 } 856 switch (name[1]) { 857 case PROC_PID_STOPFORK: 858 if (namelen != 2) 859 return (EINVAL); 860 si = ((ptmp->p_flag & P_STOPFORK) != 0); 861 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &si)) != 0) 862 return (error); 863 if (si != 0) 864 ptmp->p_flag |= P_STOPFORK; 865 else 866 ptmp->p_flag &= ~P_STOPFORK; 867 return (0); 868 869 case PROC_PID_STOPEXEC: 870 if (namelen != 2) 871 return (EINVAL); 872 si = ((ptmp->p_flag & P_STOPEXEC) != 0); 873 if ((error = sysctl_int(oldp, oldlenp, newp, newlen, &si)) != 0) 874 return (error); 875 if (si != 0) 876 ptmp->p_flag |= P_STOPEXEC; 877 else 878 ptmp->p_flag &= ~P_STOPEXEC; 879 return (0); 880 881 case PROC_PID_CORENAME: 882 if (namelen != 2) 883 return (EINVAL); 884 /* 885 * Can't use sysctl_string() here because we may malloc a new 886 * area during the process, so we have to do it by hand. 887 */ 888 curlen = strlen(ptmp->p_limit->pl_corename) + 1; 889 if (oldlenp && *oldlenp < curlen) { 890 if (!oldp) 891 *oldlenp = curlen; 892 return (ENOMEM); 893 } 894 if (newp) { 895 if (securelevel > 2) 896 return (EPERM); 897 if (newlen > MAXPATHLEN) 898 return (ENAMETOOLONG); 899 tmps = malloc(newlen + 1, M_TEMP, M_WAITOK); 900 if (tmps == NULL) 901 return (ENOMEM); 902 error = copyin(newp, tmps, newlen + 1); 903 tmps[newlen] = '\0'; 904 if (error) 905 goto cleanup; 906 /* Enforce to be either 'core' for end with '.core' */ 907 if (newlen < 4) { /* c.o.r.e */ 908 error = EINVAL; 909 goto cleanup; 910 } 911 len = newlen - 4; 912 if (len > 0) { 913 if (tmps[len - 1] != '.' && 914 tmps[len - 1] != '/') { 915 error = EINVAL; 916 goto cleanup; 917 } 918 } 919 if (strcmp(&tmps[len], "core") != 0) { 920 error = EINVAL; 921 goto cleanup; 922 } 923 } 924 if (oldp && oldlenp) { 925 *oldlenp = curlen; 926 error = copyout(ptmp->p_limit->pl_corename, oldp, 927 curlen); 928 } 929 if (newp && error == 0) { 930 /* if the 2 strings are identical, don't limcopy() */ 931 if (strcmp(tmps, ptmp->p_limit->pl_corename) == 0) { 932 error = 0; 933 goto cleanup; 934 } 935 if (ptmp->p_limit->p_refcnt > 1 && 936 (ptmp->p_limit->p_lflags & PL_SHAREMOD) == 0) { 937 newplim = limcopy(ptmp->p_limit); 938 limfree(ptmp->p_limit); 939 ptmp->p_limit = newplim; 940 } 941 if (ptmp->p_limit->pl_corename != defcorename) { 942 free(ptmp->p_limit->pl_corename, M_TEMP); 943 } 944 ptmp->p_limit->pl_corename = tmps; 945 return (0); 946 } 947 cleanup: 948 if (tmps) 949 free(tmps, M_TEMP); 950 return (error); 951 952 case PROC_PID_LIMIT: 953 if (namelen != 4 || name[2] < 1 || 954 name[2] >= PROC_PID_LIMIT_MAXID) 955 return (EINVAL); 956 memcpy(&alim, &ptmp->p_rlimit[name[2] - 1], sizeof(alim)); 957 if (name[3] == PROC_PID_LIMIT_TYPE_HARD) 958 error = sysctl_quad(oldp, oldlenp, newp, newlen, 959 &alim.rlim_max); 960 else if (name[3] == PROC_PID_LIMIT_TYPE_SOFT) 961 error = sysctl_quad(oldp, oldlenp, newp, newlen, 962 &alim.rlim_cur); 963 else 964 error = (EINVAL); 965 966 if (error) 967 return (error); 968 969 if (newp) 970 error = dosetrlimit(ptmp, p->p_cred, 971 name[2] - 1, &alim); 972 return (error); 973 974 default: 975 return (EINVAL); 976 } 977 /* NOTREACHED */ 978 return (EINVAL); 979 } 980 981 int 982 emul_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, 983 void *newp, size_t newlen, struct proc *p) 984 { 985 static struct { 986 const char *name; 987 int type; 988 } emulations[] = CTL_EMUL_NAMES; 989 const struct emul *e; 990 const char *ename; 991 #ifdef LKM 992 extern struct lock exec_lock; /* XXX */ 993 int error; 994 #else 995 extern int nexecs_builtin; 996 extern const struct execsw execsw_builtin[]; 997 int i; 998 #endif 999 1000 /* all sysctl names at this level are name and field */ 1001 if (namelen < 2) 1002 return (ENOTDIR); /* overloaded */ 1003 1004 if ((u_int) name[0] >= EMUL_MAXID || name[0] == 0) 1005 return (EOPNOTSUPP); 1006 1007 ename = emulations[name[0]].name; 1008 1009 #ifdef LKM 1010 lockmgr(&exec_lock, LK_SHARED, NULL); 1011 if ((e = emul_search(ename))) { 1012 error = (*e->e_sysctl)(name + 1, namelen - 1, oldp, oldlenp, 1013 newp, newlen, p); 1014 } else 1015 error = EOPNOTSUPP; 1016 lockmgr(&exec_lock, LK_RELEASE, NULL); 1017 1018 return (error); 1019 #else 1020 for (i = 0; i < nexecs_builtin; i++) { 1021 e = execsw_builtin[i].es_emul; 1022 /* 1023 * In order to match e.g. e->e_name "irix o32" 1024 * with ename "irix", we limit the comparison 1025 * to the length of ename. 1026 */ 1027 if (e == NULL || 1028 strncmp(ename, e->e_name, strlen(ename)) != 0 || 1029 e->e_sysctl == NULL) 1030 continue; 1031 1032 return ((*e->e_sysctl)(name + 1, namelen - 1, oldp, oldlenp, 1033 newp, newlen, p)); 1034 } 1035 1036 return (EOPNOTSUPP); 1037 #endif 1038 } 1039 /* 1040 * Convenience macros. 1041 */ 1042 1043 #define SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, len) \ 1044 if (oldlenp) { \ 1045 if (!oldp) \ 1046 *oldlenp = len; \ 1047 else { \ 1048 if (*oldlenp < len) \ 1049 return (ENOMEM); \ 1050 *oldlenp = len; \ 1051 error = copyout(valp, oldp, len); \ 1052 } \ 1053 } 1054 1055 #define SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, typ) \ 1056 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, valp, sizeof(typ)) 1057 1058 #define SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) \ 1059 if (newp && newlen != len) \ 1060 return (EINVAL); 1061 1062 #define SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, typ) \ 1063 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, sizeof(typ)) 1064 1065 #define SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, len) \ 1066 if (error == 0 && newp) \ 1067 error = copyin(newp, valp, len); 1068 1069 #define SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, typ) \ 1070 SYSCTL_SCALAR_NEWPCOP_LEN(newp, valp, sizeof(typ)) 1071 1072 #define SYSCTL_STRING_CORE(oldp, oldlenp, str) \ 1073 if (oldlenp) { \ 1074 len = strlen(str) + 1; \ 1075 if (!oldp) \ 1076 *oldlenp = len; \ 1077 else { \ 1078 if (*oldlenp < len) { \ 1079 err2 = ENOMEM; \ 1080 len = *oldlenp; \ 1081 } else \ 1082 *oldlenp = len; \ 1083 error = copyout(str, oldp, len);\ 1084 if (error == 0) \ 1085 error = err2; \ 1086 } \ 1087 } 1088 1089 /* 1090 * Validate parameters and get old / set new parameters 1091 * for an integer-valued sysctl function. 1092 */ 1093 int 1094 sysctl_int(void *oldp, size_t *oldlenp, void *newp, size_t newlen, int *valp) 1095 { 1096 int error = 0; 1097 1098 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 1099 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, int) 1100 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, int) 1101 1102 return (error); 1103 } 1104 1105 1106 /* 1107 * As above, but read-only. 1108 */ 1109 int 1110 sysctl_rdint(void *oldp, size_t *oldlenp, void *newp, int val) 1111 { 1112 int error = 0; 1113 1114 if (newp) 1115 return (EPERM); 1116 1117 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, int) 1118 1119 return (error); 1120 } 1121 1122 /* 1123 * Validate parameters and get old / set new parameters 1124 * for an quad-valued sysctl function. 1125 */ 1126 int 1127 sysctl_quad(void *oldp, size_t *oldlenp, void *newp, size_t newlen, 1128 quad_t *valp) 1129 { 1130 int error = 0; 1131 1132 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, quad_t) 1133 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, valp, quad_t) 1134 SYSCTL_SCALAR_NEWPCOP_TYP(newp, valp, quad_t) 1135 1136 return (error); 1137 } 1138 1139 /* 1140 * As above, but read-only. 1141 */ 1142 int 1143 sysctl_rdquad(void *oldp, size_t *oldlenp, void *newp, quad_t val) 1144 { 1145 int error = 0; 1146 1147 if (newp) 1148 return (EPERM); 1149 1150 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &val, quad_t) 1151 1152 return (error); 1153 } 1154 1155 /* 1156 * Validate parameters and get old / set new parameters 1157 * for a string-valued sysctl function. 1158 */ 1159 int 1160 sysctl_string(void *oldp, size_t *oldlenp, void *newp, size_t newlen, char *str, 1161 size_t maxlen) 1162 { 1163 int error = 0, err2 = 0; 1164 size_t len; 1165 1166 if (newp && newlen >= maxlen) 1167 return (EINVAL); 1168 1169 SYSCTL_STRING_CORE(oldp, oldlenp, str); 1170 1171 if (error == 0 && newp) { 1172 error = copyin(newp, str, newlen); 1173 str[newlen] = 0; 1174 } 1175 return (error); 1176 } 1177 1178 /* 1179 * As above, but read-only. 1180 */ 1181 int 1182 sysctl_rdstring(void *oldp, size_t *oldlenp, void *newp, const char *str) 1183 { 1184 int error = 0, err2 = 0; 1185 size_t len; 1186 1187 if (newp) 1188 return (EPERM); 1189 1190 SYSCTL_STRING_CORE(oldp, oldlenp, str); 1191 1192 return (error); 1193 } 1194 1195 /* 1196 * Validate parameters and get old / set new parameters 1197 * for a structure oriented sysctl function. 1198 */ 1199 int 1200 sysctl_struct(void *oldp, size_t *oldlenp, void *newp, size_t newlen, void *sp, 1201 size_t len) 1202 { 1203 int error = 0; 1204 1205 SYSCTL_SCALAR_NEWPCHECK_LEN(newp, newlen, len) 1206 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1207 SYSCTL_SCALAR_NEWPCOP_LEN(newp, sp, len) 1208 1209 return (error); 1210 } 1211 1212 /* 1213 * Validate parameters and get old parameters 1214 * for a structure oriented sysctl function. 1215 */ 1216 int 1217 sysctl_rdstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 1218 size_t len) 1219 { 1220 int error = 0; 1221 1222 if (newp) 1223 return (EPERM); 1224 1225 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1226 1227 return (error); 1228 } 1229 1230 /* 1231 * As above, but can return a truncated result. 1232 */ 1233 int 1234 sysctl_rdminstruct(void *oldp, size_t *oldlenp, void *newp, const void *sp, 1235 size_t len) 1236 { 1237 int error = 0; 1238 1239 if (newp) 1240 return (EPERM); 1241 1242 len = min(*oldlenp, len); 1243 SYSCTL_SCALAR_CORE_LEN(oldp, oldlenp, sp, len) 1244 1245 return (error); 1246 } 1247 1248 /* 1249 * Get file structures. 1250 */ 1251 static int 1252 sysctl_file(void *vwhere, size_t *sizep) 1253 { 1254 int error; 1255 size_t buflen; 1256 struct file *fp; 1257 char *start, *where; 1258 1259 start = where = vwhere; 1260 buflen = *sizep; 1261 if (where == NULL) { 1262 /* 1263 * overestimate by 10 files 1264 */ 1265 *sizep = sizeof(filehead) + (nfiles + 10) * sizeof(struct file); 1266 return (0); 1267 } 1268 1269 /* 1270 * first copyout filehead 1271 */ 1272 if (buflen < sizeof(filehead)) { 1273 *sizep = 0; 1274 return (0); 1275 } 1276 error = copyout(&filehead, where, sizeof(filehead)); 1277 if (error) 1278 return (error); 1279 buflen -= sizeof(filehead); 1280 where += sizeof(filehead); 1281 1282 /* 1283 * followed by an array of file structures 1284 */ 1285 LIST_FOREACH(fp, &filehead, f_list) { 1286 if (buflen < sizeof(struct file)) { 1287 *sizep = where - start; 1288 return (ENOMEM); 1289 } 1290 error = copyout(fp, where, sizeof(struct file)); 1291 if (error) 1292 return (error); 1293 buflen -= sizeof(struct file); 1294 where += sizeof(struct file); 1295 } 1296 *sizep = where - start; 1297 return (0); 1298 } 1299 1300 /* 1301 * Get driver names and majors 1302 */ 1303 static int 1304 sysctl_drivers(void *vwhere, size_t *sizep) 1305 { 1306 int error; 1307 size_t buflen; 1308 struct kinfo_drivers kd; 1309 char *start, *where; 1310 const char *name; 1311 int i; 1312 extern struct devsw_conv *devsw_conv; 1313 extern int max_devsw_convs; 1314 1315 start = where = vwhere; 1316 buflen = *sizep; 1317 if (where == NULL) { 1318 *sizep = max_devsw_convs * sizeof kd; 1319 return 0; 1320 } 1321 1322 /* 1323 * An array of kinfo_drivers structures 1324 */ 1325 error = 0; 1326 for (i = 0; i < max_devsw_convs; i++) { 1327 name = devsw_conv[i].d_name; 1328 if (name == NULL) 1329 continue; 1330 if (buflen < sizeof kd) { 1331 error = ENOMEM; 1332 break; 1333 } 1334 kd.d_bmajor = devsw_conv[i].d_bmajor; 1335 kd.d_cmajor = devsw_conv[i].d_cmajor; 1336 strlcpy(kd.d_name, name, sizeof kd.d_name); 1337 error = copyout(&kd, where, sizeof kd); 1338 if (error != 0) 1339 break; 1340 buflen -= sizeof kd; 1341 where += sizeof kd; 1342 } 1343 *sizep = where - start; 1344 return error; 1345 } 1346 1347 #if defined(SYSVMSG) || defined(SYSVSEM) || defined(SYSVSHM) 1348 #define FILL_PERM(src, dst) do { \ 1349 (dst)._key = (src)._key; \ 1350 (dst).uid = (src).uid; \ 1351 (dst).gid = (src).gid; \ 1352 (dst).cuid = (src).cuid; \ 1353 (dst).cgid = (src).cgid; \ 1354 (dst).mode = (src).mode; \ 1355 (dst)._seq = (src)._seq; \ 1356 } while (/*CONSTCOND*/ 0); 1357 #define FILL_MSG(src, dst) do { \ 1358 FILL_PERM((src).msg_perm, (dst).msg_perm); \ 1359 (dst).msg_qnum = (src).msg_qnum; \ 1360 (dst).msg_qbytes = (src).msg_qbytes; \ 1361 (dst)._msg_cbytes = (src)._msg_cbytes; \ 1362 (dst).msg_lspid = (src).msg_lspid; \ 1363 (dst).msg_lrpid = (src).msg_lrpid; \ 1364 (dst).msg_stime = (src).msg_stime; \ 1365 (dst).msg_rtime = (src).msg_rtime; \ 1366 (dst).msg_ctime = (src).msg_ctime; \ 1367 } while (/*CONSTCOND*/ 0) 1368 #define FILL_SEM(src, dst) do { \ 1369 FILL_PERM((src).sem_perm, (dst).sem_perm); \ 1370 (dst).sem_nsems = (src).sem_nsems; \ 1371 (dst).sem_otime = (src).sem_otime; \ 1372 (dst).sem_ctime = (src).sem_ctime; \ 1373 } while (/*CONSTCOND*/ 0) 1374 #define FILL_SHM(src, dst) do { \ 1375 FILL_PERM((src).shm_perm, (dst).shm_perm); \ 1376 (dst).shm_segsz = (src).shm_segsz; \ 1377 (dst).shm_lpid = (src).shm_lpid; \ 1378 (dst).shm_cpid = (src).shm_cpid; \ 1379 (dst).shm_atime = (src).shm_atime; \ 1380 (dst).shm_dtime = (src).shm_dtime; \ 1381 (dst).shm_ctime = (src).shm_ctime; \ 1382 (dst).shm_nattch = (src).shm_nattch; \ 1383 } while (/*CONSTCOND*/ 0) 1384 1385 static int 1386 sysctl_sysvipc(int *name, u_int namelen, void *where, size_t *sizep) 1387 { 1388 #ifdef SYSVMSG 1389 struct msg_sysctl_info *msgsi = NULL; 1390 #endif 1391 #ifdef SYSVSEM 1392 struct sem_sysctl_info *semsi = NULL; 1393 #endif 1394 #ifdef SYSVSHM 1395 struct shm_sysctl_info *shmsi = NULL; 1396 #endif 1397 size_t infosize, dssize, tsize, buflen; 1398 void *buf = NULL; 1399 char *start; 1400 int32_t nds; 1401 int i, error, ret; 1402 1403 if (namelen != 1) 1404 return (EINVAL); 1405 1406 start = where; 1407 buflen = *sizep; 1408 1409 switch (*name) { 1410 case KERN_SYSVIPC_MSG_INFO: 1411 #ifdef SYSVMSG 1412 infosize = sizeof(msgsi->msginfo); 1413 nds = msginfo.msgmni; 1414 dssize = sizeof(msgsi->msgids[0]); 1415 break; 1416 #else 1417 return (EINVAL); 1418 #endif 1419 case KERN_SYSVIPC_SEM_INFO: 1420 #ifdef SYSVSEM 1421 infosize = sizeof(semsi->seminfo); 1422 nds = seminfo.semmni; 1423 dssize = sizeof(semsi->semids[0]); 1424 break; 1425 #else 1426 return (EINVAL); 1427 #endif 1428 case KERN_SYSVIPC_SHM_INFO: 1429 #ifdef SYSVSHM 1430 infosize = sizeof(shmsi->shminfo); 1431 nds = shminfo.shmmni; 1432 dssize = sizeof(shmsi->shmids[0]); 1433 break; 1434 #else 1435 return (EINVAL); 1436 #endif 1437 default: 1438 return (EINVAL); 1439 } 1440 /* 1441 * Round infosize to 64 bit boundary if requesting more than just 1442 * the info structure or getting the total data size. 1443 */ 1444 if (where == NULL || *sizep > infosize) 1445 infosize = ((infosize + 7) / 8) * 8; 1446 tsize = infosize + nds * dssize; 1447 1448 /* Return just the total size required. */ 1449 if (where == NULL) { 1450 *sizep = tsize; 1451 return (0); 1452 } 1453 1454 /* Not enough room for even the info struct. */ 1455 if (buflen < infosize) { 1456 *sizep = 0; 1457 return (ENOMEM); 1458 } 1459 buf = malloc(min(tsize, buflen), M_TEMP, M_WAITOK); 1460 memset(buf, 0, min(tsize, buflen)); 1461 1462 switch (*name) { 1463 #ifdef SYSVMSG 1464 case KERN_SYSVIPC_MSG_INFO: 1465 msgsi = (struct msg_sysctl_info *)buf; 1466 msgsi->msginfo = msginfo; 1467 break; 1468 #endif 1469 #ifdef SYSVSEM 1470 case KERN_SYSVIPC_SEM_INFO: 1471 semsi = (struct sem_sysctl_info *)buf; 1472 semsi->seminfo = seminfo; 1473 break; 1474 #endif 1475 #ifdef SYSVSHM 1476 case KERN_SYSVIPC_SHM_INFO: 1477 shmsi = (struct shm_sysctl_info *)buf; 1478 shmsi->shminfo = shminfo; 1479 break; 1480 #endif 1481 } 1482 buflen -= infosize; 1483 1484 ret = 0; 1485 if (buflen > 0) { 1486 /* Fill in the IPC data structures. */ 1487 for (i = 0; i < nds; i++) { 1488 if (buflen < dssize) { 1489 ret = ENOMEM; 1490 break; 1491 } 1492 switch (*name) { 1493 #ifdef SYSVMSG 1494 case KERN_SYSVIPC_MSG_INFO: 1495 FILL_MSG(msqids[i], msgsi->msgids[i]); 1496 break; 1497 #endif 1498 #ifdef SYSVSEM 1499 case KERN_SYSVIPC_SEM_INFO: 1500 FILL_SEM(sema[i], semsi->semids[i]); 1501 break; 1502 #endif 1503 #ifdef SYSVSHM 1504 case KERN_SYSVIPC_SHM_INFO: 1505 FILL_SHM(shmsegs[i], shmsi->shmids[i]); 1506 break; 1507 #endif 1508 } 1509 buflen -= dssize; 1510 } 1511 } 1512 *sizep -= buflen; 1513 error = copyout(buf, start, *sizep); 1514 /* If copyout succeeded, use return code set earlier. */ 1515 if (error == 0) 1516 error = ret; 1517 if (buf) 1518 free(buf, M_TEMP); 1519 return (error); 1520 } 1521 #endif /* SYSVMSG || SYSVSEM || SYSVSHM */ 1522 1523 static int 1524 sysctl_msgbuf(void *vwhere, size_t *sizep) 1525 { 1526 char *where = vwhere; 1527 size_t len, maxlen = *sizep; 1528 long beg, end; 1529 int error; 1530 1531 /* 1532 * deal with cases where the message buffer has 1533 * become corrupted. 1534 */ 1535 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 1536 msgbufenabled = 0; 1537 return (ENXIO); 1538 } 1539 1540 if (where == NULL) { 1541 /* always return full buffer size */ 1542 *sizep = msgbufp->msg_bufs; 1543 return (0); 1544 } 1545 1546 error = 0; 1547 maxlen = min(msgbufp->msg_bufs, maxlen); 1548 1549 /* 1550 * First, copy from the write pointer to the end of 1551 * message buffer. 1552 */ 1553 beg = msgbufp->msg_bufx; 1554 end = msgbufp->msg_bufs; 1555 while (maxlen > 0) { 1556 len = min(end - beg, maxlen); 1557 if (len == 0) 1558 break; 1559 error = copyout(&msgbufp->msg_bufc[beg], where, len); 1560 if (error) 1561 break; 1562 where += len; 1563 maxlen -= len; 1564 1565 /* 1566 * ... then, copy from the beginning of message buffer to 1567 * the write pointer. 1568 */ 1569 beg = 0; 1570 end = msgbufp->msg_bufx; 1571 } 1572 return (error); 1573 } 1574 1575 /* 1576 * try over estimating by 5 procs 1577 */ 1578 #define KERN_PROCSLOP (5 * sizeof(struct kinfo_proc)) 1579 1580 static int 1581 sysctl_doeproc(int *name, u_int namelen, void *vwhere, size_t *sizep) 1582 { 1583 struct eproc eproc; 1584 struct kinfo_proc2 kproc2; 1585 struct kinfo_proc *dp; 1586 struct proc *p; 1587 const struct proclist_desc *pd; 1588 char *where, *dp2; 1589 int type, op, arg; 1590 u_int elem_size, elem_count; 1591 size_t buflen, needed; 1592 int error; 1593 1594 dp = vwhere; 1595 dp2 = where = vwhere; 1596 buflen = where != NULL ? *sizep : 0; 1597 error = 0; 1598 needed = 0; 1599 type = name[0]; 1600 1601 if (type == KERN_PROC) { 1602 if (namelen != 3 && !(namelen == 2 && name[1] == KERN_PROC_ALL)) 1603 return (EINVAL); 1604 op = name[1]; 1605 if (op != KERN_PROC_ALL) 1606 arg = name[2]; 1607 else 1608 arg = 0; /* Quell compiler warning */ 1609 elem_size = elem_count = 0; /* Ditto */ 1610 } else { 1611 if (namelen != 5) 1612 return (EINVAL); 1613 op = name[1]; 1614 arg = name[2]; 1615 elem_size = name[3]; 1616 elem_count = name[4]; 1617 } 1618 1619 proclist_lock_read(); 1620 1621 pd = proclists; 1622 again: 1623 for (p = LIST_FIRST(pd->pd_list); p != NULL; p = LIST_NEXT(p, p_list)) { 1624 /* 1625 * Skip embryonic processes. 1626 */ 1627 if (p->p_stat == SIDL) 1628 continue; 1629 /* 1630 * TODO - make more efficient (see notes below). 1631 * do by session. 1632 */ 1633 switch (op) { 1634 1635 case KERN_PROC_PID: 1636 /* could do this with just a lookup */ 1637 if (p->p_pid != (pid_t)arg) 1638 continue; 1639 break; 1640 1641 case KERN_PROC_PGRP: 1642 /* could do this by traversing pgrp */ 1643 if (p->p_pgrp->pg_id != (pid_t)arg) 1644 continue; 1645 break; 1646 1647 case KERN_PROC_SESSION: 1648 if (p->p_session->s_sid != (pid_t)arg) 1649 continue; 1650 break; 1651 1652 case KERN_PROC_TTY: 1653 if (arg == (int) KERN_PROC_TTY_REVOKE) { 1654 if ((p->p_flag & P_CONTROLT) == 0 || 1655 p->p_session->s_ttyp == NULL || 1656 p->p_session->s_ttyvp != NULL) 1657 continue; 1658 } else if ((p->p_flag & P_CONTROLT) == 0 || 1659 p->p_session->s_ttyp == NULL) { 1660 if ((dev_t)arg != KERN_PROC_TTY_NODEV) 1661 continue; 1662 } else if (p->p_session->s_ttyp->t_dev != (dev_t)arg) 1663 continue; 1664 break; 1665 1666 case KERN_PROC_UID: 1667 if (p->p_ucred->cr_uid != (uid_t)arg) 1668 continue; 1669 break; 1670 1671 case KERN_PROC_RUID: 1672 if (p->p_cred->p_ruid != (uid_t)arg) 1673 continue; 1674 break; 1675 1676 case KERN_PROC_GID: 1677 if (p->p_ucred->cr_gid != (uid_t)arg) 1678 continue; 1679 break; 1680 1681 case KERN_PROC_RGID: 1682 if (p->p_cred->p_rgid != (uid_t)arg) 1683 continue; 1684 break; 1685 1686 case KERN_PROC_ALL: 1687 /* allow everything */ 1688 break; 1689 1690 default: 1691 error = EINVAL; 1692 goto cleanup; 1693 } 1694 if (type == KERN_PROC) { 1695 if (buflen >= sizeof(struct kinfo_proc)) { 1696 fill_eproc(p, &eproc); 1697 error = copyout(p, &dp->kp_proc, 1698 sizeof(struct proc)); 1699 if (error) 1700 goto cleanup; 1701 error = copyout(&eproc, &dp->kp_eproc, 1702 sizeof(eproc)); 1703 if (error) 1704 goto cleanup; 1705 dp++; 1706 buflen -= sizeof(struct kinfo_proc); 1707 } 1708 needed += sizeof(struct kinfo_proc); 1709 } else { /* KERN_PROC2 */ 1710 if (buflen >= elem_size && elem_count > 0) { 1711 fill_kproc2(p, &kproc2); 1712 /* 1713 * Copy out elem_size, but not larger than 1714 * the size of a struct kinfo_proc2. 1715 */ 1716 error = copyout(&kproc2, dp2, 1717 min(sizeof(kproc2), elem_size)); 1718 if (error) 1719 goto cleanup; 1720 dp2 += elem_size; 1721 buflen -= elem_size; 1722 elem_count--; 1723 } 1724 needed += elem_size; 1725 } 1726 } 1727 pd++; 1728 if (pd->pd_list != NULL) 1729 goto again; 1730 proclist_unlock_read(); 1731 1732 if (where != NULL) { 1733 if (type == KERN_PROC) 1734 *sizep = (char *)dp - where; 1735 else 1736 *sizep = dp2 - where; 1737 if (needed > *sizep) 1738 return (ENOMEM); 1739 } else { 1740 needed += KERN_PROCSLOP; 1741 *sizep = needed; 1742 } 1743 return (0); 1744 cleanup: 1745 proclist_unlock_read(); 1746 return (error); 1747 } 1748 1749 1750 /* 1751 * try over estimating by 5 LWPs 1752 */ 1753 #define KERN_LWPSLOP (5 * sizeof(struct kinfo_lwp)) 1754 1755 static int 1756 sysctl_dolwp(int *name, u_int namelen, void *vwhere, size_t *sizep) 1757 { 1758 struct kinfo_lwp klwp; 1759 struct proc *p; 1760 struct lwp *l; 1761 char *where, *dp; 1762 int type, pid, elem_size, elem_count; 1763 int buflen, needed, error; 1764 1765 dp = where = vwhere; 1766 buflen = where != NULL ? *sizep : 0; 1767 error = needed = 0; 1768 type = name[0]; 1769 1770 if (namelen != 4) 1771 return (EINVAL); 1772 pid = name[1]; 1773 elem_size = name[2]; 1774 elem_count = name[3]; 1775 1776 p = pfind(pid); 1777 if (p == NULL) 1778 return (ESRCH); 1779 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 1780 if (buflen >= elem_size && elem_count > 0) { 1781 fill_lwp(l, &klwp); 1782 /* 1783 * Copy out elem_size, but not larger than 1784 * the size of a struct kinfo_proc2. 1785 */ 1786 error = copyout(&klwp, dp, 1787 min(sizeof(klwp), elem_size)); 1788 if (error) 1789 goto cleanup; 1790 dp += elem_size; 1791 buflen -= elem_size; 1792 elem_count--; 1793 } 1794 needed += elem_size; 1795 } 1796 1797 if (where != NULL) { 1798 *sizep = dp - where; 1799 if (needed > *sizep) 1800 return (ENOMEM); 1801 } else { 1802 needed += KERN_PROCSLOP; 1803 *sizep = needed; 1804 } 1805 return (0); 1806 cleanup: 1807 return (error); 1808 } 1809 1810 /* 1811 * Fill in an eproc structure for the specified process. 1812 */ 1813 void 1814 fill_eproc(struct proc *p, struct eproc *ep) 1815 { 1816 struct tty *tp; 1817 struct lwp *l; 1818 1819 ep->e_paddr = p; 1820 ep->e_sess = p->p_session; 1821 ep->e_pcred = *p->p_cred; 1822 ep->e_ucred = *p->p_ucred; 1823 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1824 ep->e_vm.vm_rssize = 0; 1825 ep->e_vm.vm_tsize = 0; 1826 ep->e_vm.vm_dsize = 0; 1827 ep->e_vm.vm_ssize = 0; 1828 /* ep->e_vm.vm_pmap = XXX; */ 1829 } else { 1830 struct vmspace *vm = p->p_vmspace; 1831 1832 ep->e_vm.vm_rssize = vm_resident_count(vm); 1833 ep->e_vm.vm_tsize = vm->vm_tsize; 1834 ep->e_vm.vm_dsize = vm->vm_dsize; 1835 ep->e_vm.vm_ssize = vm->vm_ssize; 1836 1837 /* Pick a "representative" LWP */ 1838 l = proc_representative_lwp(p); 1839 1840 if (l->l_wmesg) 1841 strncpy(ep->e_wmesg, l->l_wmesg, WMESGLEN); 1842 } 1843 if (p->p_pptr) 1844 ep->e_ppid = p->p_pptr->p_pid; 1845 else 1846 ep->e_ppid = 0; 1847 ep->e_pgid = p->p_pgrp->pg_id; 1848 ep->e_sid = ep->e_sess->s_sid; 1849 ep->e_jobc = p->p_pgrp->pg_jobc; 1850 if ((p->p_flag & P_CONTROLT) && 1851 (tp = ep->e_sess->s_ttyp)) { 1852 ep->e_tdev = tp->t_dev; 1853 ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PGID; 1854 ep->e_tsess = tp->t_session; 1855 } else 1856 ep->e_tdev = NODEV; 1857 1858 ep->e_xsize = ep->e_xrssize = 0; 1859 ep->e_xccount = ep->e_xswrss = 0; 1860 ep->e_flag = ep->e_sess->s_ttyvp ? EPROC_CTTY : 0; 1861 if (SESS_LEADER(p)) 1862 ep->e_flag |= EPROC_SLEADER; 1863 strncpy(ep->e_login, ep->e_sess->s_login, MAXLOGNAME); 1864 } 1865 1866 /* 1867 * Fill in an eproc structure for the specified process. 1868 */ 1869 static void 1870 fill_kproc2(struct proc *p, struct kinfo_proc2 *ki) 1871 { 1872 struct tty *tp; 1873 struct lwp *l; 1874 struct timeval ut, st; 1875 1876 memset(ki, 0, sizeof(*ki)); 1877 1878 ki->p_paddr = PTRTOINT64(p); 1879 ki->p_fd = PTRTOINT64(p->p_fd); 1880 ki->p_cwdi = PTRTOINT64(p->p_cwdi); 1881 ki->p_stats = PTRTOINT64(p->p_stats); 1882 ki->p_limit = PTRTOINT64(p->p_limit); 1883 ki->p_vmspace = PTRTOINT64(p->p_vmspace); 1884 ki->p_sigacts = PTRTOINT64(p->p_sigacts); 1885 ki->p_sess = PTRTOINT64(p->p_session); 1886 ki->p_tsess = 0; /* may be changed if controlling tty below */ 1887 ki->p_ru = PTRTOINT64(p->p_ru); 1888 1889 ki->p_eflag = 0; 1890 ki->p_exitsig = p->p_exitsig; 1891 ki->p_flag = p->p_flag; 1892 1893 ki->p_pid = p->p_pid; 1894 if (p->p_pptr) 1895 ki->p_ppid = p->p_pptr->p_pid; 1896 else 1897 ki->p_ppid = 0; 1898 ki->p_sid = p->p_session->s_sid; 1899 ki->p__pgid = p->p_pgrp->pg_id; 1900 1901 ki->p_tpgid = NO_PGID; /* may be changed if controlling tty below */ 1902 1903 ki->p_uid = p->p_ucred->cr_uid; 1904 ki->p_ruid = p->p_cred->p_ruid; 1905 ki->p_gid = p->p_ucred->cr_gid; 1906 ki->p_rgid = p->p_cred->p_rgid; 1907 ki->p_svuid = p->p_cred->p_svuid; 1908 ki->p_svgid = p->p_cred->p_svgid; 1909 1910 memcpy(ki->p_groups, p->p_cred->pc_ucred->cr_groups, 1911 min(sizeof(ki->p_groups), sizeof(p->p_cred->pc_ucred->cr_groups))); 1912 ki->p_ngroups = p->p_cred->pc_ucred->cr_ngroups; 1913 1914 ki->p_jobc = p->p_pgrp->pg_jobc; 1915 if ((p->p_flag & P_CONTROLT) && (tp = p->p_session->s_ttyp)) { 1916 ki->p_tdev = tp->t_dev; 1917 ki->p_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PGID; 1918 ki->p_tsess = PTRTOINT64(tp->t_session); 1919 } else { 1920 ki->p_tdev = NODEV; 1921 } 1922 1923 ki->p_estcpu = p->p_estcpu; 1924 ki->p_rtime_sec = p->p_rtime.tv_sec; 1925 ki->p_rtime_usec = p->p_rtime.tv_usec; 1926 ki->p_cpticks = p->p_cpticks; 1927 ki->p_pctcpu = p->p_pctcpu; 1928 1929 ki->p_uticks = p->p_uticks; 1930 ki->p_sticks = p->p_sticks; 1931 ki->p_iticks = p->p_iticks; 1932 1933 ki->p_tracep = PTRTOINT64(p->p_tracep); 1934 ki->p_traceflag = p->p_traceflag; 1935 1936 1937 memcpy(&ki->p_siglist, &p->p_sigctx.ps_siglist, sizeof(ki_sigset_t)); 1938 memcpy(&ki->p_sigmask, &p->p_sigctx.ps_sigmask, sizeof(ki_sigset_t)); 1939 memcpy(&ki->p_sigignore, &p->p_sigctx.ps_sigignore,sizeof(ki_sigset_t)); 1940 memcpy(&ki->p_sigcatch, &p->p_sigctx.ps_sigcatch, sizeof(ki_sigset_t)); 1941 1942 ki->p_stat = p->p_stat; /* Will likely be overridden by LWP status */ 1943 ki->p_realstat = p->p_stat; 1944 ki->p_nice = p->p_nice; 1945 1946 ki->p_xstat = p->p_xstat; 1947 ki->p_acflag = p->p_acflag; 1948 1949 strncpy(ki->p_comm, p->p_comm, 1950 min(sizeof(ki->p_comm), sizeof(p->p_comm))); 1951 1952 strncpy(ki->p_login, p->p_session->s_login, 1953 min(sizeof ki->p_login - 1, sizeof p->p_session->s_login)); 1954 1955 ki->p_nlwps = p->p_nlwps; 1956 ki->p_nrlwps = p->p_nrlwps; 1957 ki->p_realflag = p->p_flag; 1958 1959 if (p->p_stat == SIDL || P_ZOMBIE(p)) { 1960 ki->p_vm_rssize = 0; 1961 ki->p_vm_tsize = 0; 1962 ki->p_vm_dsize = 0; 1963 ki->p_vm_ssize = 0; 1964 l = NULL; 1965 } else { 1966 struct vmspace *vm = p->p_vmspace; 1967 1968 ki->p_vm_rssize = vm_resident_count(vm); 1969 ki->p_vm_tsize = vm->vm_tsize; 1970 ki->p_vm_dsize = vm->vm_dsize; 1971 ki->p_vm_ssize = vm->vm_ssize; 1972 1973 /* Pick a "representative" LWP */ 1974 l = proc_representative_lwp(p); 1975 ki->p_forw = PTRTOINT64(l->l_forw); 1976 ki->p_back = PTRTOINT64(l->l_back); 1977 ki->p_addr = PTRTOINT64(l->l_addr); 1978 ki->p_stat = l->l_stat; 1979 ki->p_flag |= l->l_flag; 1980 ki->p_swtime = l->l_swtime; 1981 ki->p_slptime = l->l_slptime; 1982 if (l->l_stat == LSONPROC) { 1983 KDASSERT(l->l_cpu != NULL); 1984 ki->p_schedflags = l->l_cpu->ci_schedstate.spc_flags; 1985 } else 1986 ki->p_schedflags = 0; 1987 ki->p_holdcnt = l->l_holdcnt; 1988 ki->p_priority = l->l_priority; 1989 ki->p_usrpri = l->l_usrpri; 1990 if (l->l_wmesg) 1991 strncpy(ki->p_wmesg, l->l_wmesg, sizeof(ki->p_wmesg)); 1992 ki->p_wchan = PTRTOINT64(l->l_wchan); 1993 1994 } 1995 1996 if (p->p_session->s_ttyvp) 1997 ki->p_eflag |= EPROC_CTTY; 1998 if (SESS_LEADER(p)) 1999 ki->p_eflag |= EPROC_SLEADER; 2000 2001 /* XXX Is this double check necessary? */ 2002 if (P_ZOMBIE(p)) { 2003 ki->p_uvalid = 0; 2004 } else { 2005 ki->p_uvalid = 1; 2006 2007 ki->p_ustart_sec = p->p_stats->p_start.tv_sec; 2008 ki->p_ustart_usec = p->p_stats->p_start.tv_usec; 2009 2010 calcru(p, &ut, &st, 0); 2011 ki->p_uutime_sec = ut.tv_sec; 2012 ki->p_uutime_usec = ut.tv_usec; 2013 ki->p_ustime_sec = st.tv_sec; 2014 ki->p_ustime_usec = st.tv_usec; 2015 2016 ki->p_uru_maxrss = p->p_stats->p_ru.ru_maxrss; 2017 ki->p_uru_ixrss = p->p_stats->p_ru.ru_ixrss; 2018 ki->p_uru_idrss = p->p_stats->p_ru.ru_idrss; 2019 ki->p_uru_isrss = p->p_stats->p_ru.ru_isrss; 2020 ki->p_uru_minflt = p->p_stats->p_ru.ru_minflt; 2021 ki->p_uru_majflt = p->p_stats->p_ru.ru_majflt; 2022 ki->p_uru_nswap = p->p_stats->p_ru.ru_nswap; 2023 ki->p_uru_inblock = p->p_stats->p_ru.ru_inblock; 2024 ki->p_uru_oublock = p->p_stats->p_ru.ru_oublock; 2025 ki->p_uru_msgsnd = p->p_stats->p_ru.ru_msgsnd; 2026 ki->p_uru_msgrcv = p->p_stats->p_ru.ru_msgrcv; 2027 ki->p_uru_nsignals = p->p_stats->p_ru.ru_nsignals; 2028 ki->p_uru_nvcsw = p->p_stats->p_ru.ru_nvcsw; 2029 ki->p_uru_nivcsw = p->p_stats->p_ru.ru_nivcsw; 2030 2031 timeradd(&p->p_stats->p_cru.ru_utime, 2032 &p->p_stats->p_cru.ru_stime, &ut); 2033 ki->p_uctime_sec = ut.tv_sec; 2034 ki->p_uctime_usec = ut.tv_usec; 2035 } 2036 #ifdef MULTIPROCESSOR 2037 if (l && l->l_cpu != NULL) 2038 ki->p_cpuid = l->l_cpu->ci_cpuid; 2039 else 2040 #endif 2041 ki->p_cpuid = KI_NOCPU; 2042 2043 } 2044 2045 /* 2046 * Fill in a kinfo_lwp structure for the specified lwp. 2047 */ 2048 static void 2049 fill_lwp(struct lwp *l, struct kinfo_lwp *kl) 2050 { 2051 2052 kl->l_forw = PTRTOINT64(l->l_forw); 2053 kl->l_back = PTRTOINT64(l->l_back); 2054 kl->l_laddr = PTRTOINT64(l); 2055 kl->l_addr = PTRTOINT64(l->l_addr); 2056 kl->l_stat = l->l_stat; 2057 kl->l_lid = l->l_lid; 2058 kl->l_flag = l->l_flag; 2059 2060 kl->l_swtime = l->l_swtime; 2061 kl->l_slptime = l->l_slptime; 2062 if (l->l_stat == LSONPROC) { 2063 KDASSERT(l->l_cpu != NULL); 2064 kl->l_schedflags = l->l_cpu->ci_schedstate.spc_flags; 2065 } else 2066 kl->l_schedflags = 0; 2067 kl->l_holdcnt = l->l_holdcnt; 2068 kl->l_priority = l->l_priority; 2069 kl->l_usrpri = l->l_usrpri; 2070 if (l->l_wmesg) 2071 strncpy(kl->l_wmesg, l->l_wmesg, sizeof(kl->l_wmesg)); 2072 kl->l_wchan = PTRTOINT64(l->l_wchan); 2073 #ifdef MULTIPROCESSOR 2074 if (l->l_cpu != NULL) 2075 kl->l_cpuid = l->l_cpu->ci_cpuid; 2076 else 2077 #endif 2078 kl->l_cpuid = KI_NOCPU; 2079 } 2080 2081 int 2082 sysctl_procargs(int *name, u_int namelen, void *where, size_t *sizep, 2083 struct proc *up) 2084 { 2085 struct ps_strings pss; 2086 struct proc *p; 2087 size_t len, upper_bound, xlen, i; 2088 struct uio auio; 2089 struct iovec aiov; 2090 vaddr_t argv; 2091 pid_t pid; 2092 int nargv, type, error; 2093 char *arg; 2094 char *tmp; 2095 2096 if (namelen != 2) 2097 return (EINVAL); 2098 pid = name[0]; 2099 type = name[1]; 2100 2101 switch (type) { 2102 case KERN_PROC_ARGV: 2103 case KERN_PROC_NARGV: 2104 case KERN_PROC_ENV: 2105 case KERN_PROC_NENV: 2106 /* ok */ 2107 break; 2108 default: 2109 return (EINVAL); 2110 } 2111 2112 /* check pid */ 2113 if ((p = pfind(pid)) == NULL) 2114 return (EINVAL); 2115 2116 /* only root or same user change look at the environment */ 2117 if (type == KERN_PROC_ENV || type == KERN_PROC_NENV) { 2118 if (up->p_ucred->cr_uid != 0) { 2119 if (up->p_cred->p_ruid != p->p_cred->p_ruid || 2120 up->p_cred->p_ruid != p->p_cred->p_svuid) 2121 return (EPERM); 2122 } 2123 } 2124 2125 if (sizep != NULL && where == NULL) { 2126 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) 2127 *sizep = sizeof (int); 2128 else 2129 *sizep = ARG_MAX; /* XXX XXX XXX */ 2130 return (0); 2131 } 2132 if (where == NULL || sizep == NULL) 2133 return (EINVAL); 2134 2135 /* 2136 * Zombies don't have a stack, so we can't read their psstrings. 2137 * System processes also don't have a user stack. 2138 */ 2139 if (P_ZOMBIE(p) || (p->p_flag & P_SYSTEM) != 0) 2140 return (EINVAL); 2141 2142 /* 2143 * Lock the process down in memory. 2144 */ 2145 /* XXXCDC: how should locking work here? */ 2146 if ((p->p_flag & P_WEXIT) || (p->p_vmspace->vm_refcnt < 1)) 2147 return (EFAULT); 2148 2149 p->p_vmspace->vm_refcnt++; /* XXX */ 2150 2151 /* 2152 * Allocate a temporary buffer to hold the arguments. 2153 */ 2154 arg = malloc(PAGE_SIZE, M_TEMP, M_WAITOK); 2155 2156 /* 2157 * Read in the ps_strings structure. 2158 */ 2159 aiov.iov_base = &pss; 2160 aiov.iov_len = sizeof(pss); 2161 auio.uio_iov = &aiov; 2162 auio.uio_iovcnt = 1; 2163 auio.uio_offset = (vaddr_t)p->p_psstr; 2164 auio.uio_resid = sizeof(pss); 2165 auio.uio_segflg = UIO_SYSSPACE; 2166 auio.uio_rw = UIO_READ; 2167 auio.uio_procp = NULL; 2168 error = uvm_io(&p->p_vmspace->vm_map, &auio); 2169 if (error) 2170 goto done; 2171 2172 if (type == KERN_PROC_ARGV || type == KERN_PROC_NARGV) 2173 memcpy(&nargv, (char *)&pss + p->p_psnargv, sizeof(nargv)); 2174 else 2175 memcpy(&nargv, (char *)&pss + p->p_psnenv, sizeof(nargv)); 2176 if (type == KERN_PROC_NARGV || type == KERN_PROC_NENV) { 2177 error = copyout(&nargv, where, sizeof(nargv)); 2178 *sizep = sizeof(nargv); 2179 goto done; 2180 } 2181 /* 2182 * Now read the address of the argument vector. 2183 */ 2184 switch (type) { 2185 case KERN_PROC_ARGV: 2186 /* XXX compat32 stuff here */ 2187 memcpy(&tmp, (char *)&pss + p->p_psargv, sizeof(tmp)); 2188 break; 2189 case KERN_PROC_ENV: 2190 memcpy(&tmp, (char *)&pss + p->p_psenv, sizeof(tmp)); 2191 break; 2192 default: 2193 return (EINVAL); 2194 } 2195 auio.uio_offset = (off_t)(long)tmp; 2196 aiov.iov_base = &argv; 2197 aiov.iov_len = sizeof(argv); 2198 auio.uio_iov = &aiov; 2199 auio.uio_iovcnt = 1; 2200 auio.uio_resid = sizeof(argv); 2201 auio.uio_segflg = UIO_SYSSPACE; 2202 auio.uio_rw = UIO_READ; 2203 auio.uio_procp = NULL; 2204 error = uvm_io(&p->p_vmspace->vm_map, &auio); 2205 if (error) 2206 goto done; 2207 2208 /* 2209 * Now copy in the actual argument vector, one page at a time, 2210 * since we don't know how long the vector is (though, we do 2211 * know how many NUL-terminated strings are in the vector). 2212 */ 2213 len = 0; 2214 upper_bound = *sizep; 2215 for (; nargv != 0 && len < upper_bound; len += xlen) { 2216 aiov.iov_base = arg; 2217 aiov.iov_len = PAGE_SIZE; 2218 auio.uio_iov = &aiov; 2219 auio.uio_iovcnt = 1; 2220 auio.uio_offset = argv + len; 2221 xlen = PAGE_SIZE - ((argv + len) & PAGE_MASK); 2222 auio.uio_resid = xlen; 2223 auio.uio_segflg = UIO_SYSSPACE; 2224 auio.uio_rw = UIO_READ; 2225 auio.uio_procp = NULL; 2226 error = uvm_io(&p->p_vmspace->vm_map, &auio); 2227 if (error) 2228 goto done; 2229 2230 for (i = 0; i < xlen && nargv != 0; i++) { 2231 if (arg[i] == '\0') 2232 nargv--; /* one full string */ 2233 } 2234 2235 /* 2236 * Make sure we don't copyout past the end of the user's 2237 * buffer. 2238 */ 2239 if (len + i > upper_bound) 2240 i = upper_bound - len; 2241 2242 error = copyout(arg, (char *)where + len, i); 2243 if (error) 2244 break; 2245 2246 if (nargv == 0) { 2247 len += i; 2248 break; 2249 } 2250 } 2251 *sizep = len; 2252 2253 done: 2254 uvmspace_free(p->p_vmspace); 2255 2256 free(arg, M_TEMP); 2257 return (error); 2258 } 2259 2260 #if NPTY > 0 2261 int pty_maxptys(int, int); /* defined in kern/tty_pty.c */ 2262 2263 /* 2264 * Validate parameters and get old / set new parameters 2265 * for pty sysctl function. 2266 */ 2267 static int 2268 sysctl_pty(void *oldp, size_t *oldlenp, void *newp, size_t newlen) 2269 { 2270 int error = 0; 2271 int oldmax = 0, newmax = 0; 2272 2273 /* get current value of maxptys */ 2274 oldmax = pty_maxptys(0, 0); 2275 2276 SYSCTL_SCALAR_CORE_TYP(oldp, oldlenp, &oldmax, int) 2277 2278 if (!error && newp) { 2279 SYSCTL_SCALAR_NEWPCHECK_TYP(newp, newlen, int) 2280 SYSCTL_SCALAR_NEWPCOP_TYP(newp, &newmax, int) 2281 2282 if (newmax != pty_maxptys(newmax, (newp != NULL))) 2283 return (EINVAL); 2284 2285 } 2286 2287 return (error); 2288 } 2289 #endif /* NPTY > 0 */ 2290 2291 static int 2292 sysctl_dotkstat(int *name, u_int namelen, void *where, size_t *sizep, 2293 void *newp) 2294 { 2295 2296 /* all sysctl names at this level are terminal */ 2297 if (namelen != 1) 2298 return (ENOTDIR); /* overloaded */ 2299 2300 switch (name[0]) { 2301 case KERN_TKSTAT_NIN: 2302 return (sysctl_rdquad(where, sizep, newp, tk_nin)); 2303 case KERN_TKSTAT_NOUT: 2304 return (sysctl_rdquad(where, sizep, newp, tk_nout)); 2305 case KERN_TKSTAT_CANCC: 2306 return (sysctl_rdquad(where, sizep, newp, tk_cancc)); 2307 case KERN_TKSTAT_RAWCC: 2308 return (sysctl_rdquad(where, sizep, newp, tk_rawcc)); 2309 default: 2310 return (EOPNOTSUPP); 2311 } 2312 } 2313
Indexes created Tue Sep 30 06:09:59 GMT 2025