init_sysctl.c revision 1.180
1/* $NetBSD: init_sysctl.c,v 1.180 2011/04/02 05:07:57 rmind Exp $ */ 2 3/*- 4 * Copyright (c) 2003, 2007, 2008, 2009 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Andrew Brown, and by Andrew Doran. 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32#include <sys/cdefs.h> 33__KERNEL_RCSID(0, "$NetBSD: init_sysctl.c,v 1.180 2011/04/02 05:07:57 rmind Exp $"); 34 35#include "opt_sysv.h" 36#include "opt_compat_netbsd.h" 37#include "opt_modular.h" 38#include "opt_sa.h" 39#include "opt_posix.h" 40#include "pty.h" 41#include "rnd.h" 42 43#include <sys/types.h> 44#include <sys/param.h> 45#include <sys/sysctl.h> 46#include <sys/cpu.h> 47#include <sys/errno.h> 48#include <sys/systm.h> 49#include <sys/kernel.h> 50#include <sys/unistd.h> 51#include <sys/disklabel.h> 52#include <sys/rnd.h> 53#include <sys/vnode.h> 54#include <sys/mount.h> 55#include <sys/namei.h> 56#include <sys/msgbuf.h> 57#include <dev/cons.h> 58#include <sys/socketvar.h> 59#include <sys/file.h> 60#include <sys/filedesc.h> 61#include <sys/tty.h> 62#include <sys/kmem.h> 63#include <sys/resource.h> 64#include <sys/resourcevar.h> 65#include <sys/exec.h> 66#include <sys/conf.h> 67#include <sys/device.h> 68#include <sys/stat.h> 69#include <sys/kauth.h> 70#include <sys/ktrace.h> 71#include <sys/ksem.h> 72 73#ifdef COMPAT_50 74#include <compat/sys/time.h> 75#endif 76 77#ifdef KERN_SA 78#include <sys/sa.h> 79#endif 80 81#include <sys/cpu.h> 82 83#if defined(MODULAR) || defined(P1003_1B_SEMAPHORE) 84int posix_semaphores = 200112; 85#else 86int posix_semaphores; 87#endif 88 89int security_setidcore_dump; 90char security_setidcore_path[MAXPATHLEN] = "/var/crash/%n.core"; 91uid_t security_setidcore_owner = 0; 92gid_t security_setidcore_group = 0; 93mode_t security_setidcore_mode = (S_IRUSR|S_IWUSR); 94 95static const u_int sysctl_flagmap[] = { 96 PK_ADVLOCK, P_ADVLOCK, 97 PK_EXEC, P_EXEC, 98 PK_NOCLDWAIT, P_NOCLDWAIT, 99 PK_32, P_32, 100 PK_CLDSIGIGN, P_CLDSIGIGN, 101 PK_SUGID, P_SUGID, 102 0 103}; 104 105static const u_int sysctl_sflagmap[] = { 106 PS_NOCLDSTOP, P_NOCLDSTOP, 107 PS_WEXIT, P_WEXIT, 108 PS_STOPFORK, P_STOPFORK, 109 PS_STOPEXEC, P_STOPEXEC, 110 PS_STOPEXIT, P_STOPEXIT, 111 0 112}; 113 114static const u_int sysctl_slflagmap[] = { 115 PSL_TRACED, P_TRACED, 116 PSL_FSTRACE, P_FSTRACE, 117 PSL_CHTRACED, P_CHTRACED, 118 PSL_SYSCALL, P_SYSCALL, 119 0 120}; 121 122static const u_int sysctl_lflagmap[] = { 123 PL_CONTROLT, P_CONTROLT, 124 PL_PPWAIT, P_PPWAIT, 125 0 126}; 127 128static const u_int sysctl_stflagmap[] = { 129 PST_PROFIL, P_PROFIL, 130 0 131 132}; 133 134static const u_int sysctl_lwpprflagmap[] = { 135 LPR_DETACHED, L_DETACHED, 136 0 137}; 138 139/* 140 * try over estimating by 5 procs/lwps 141 */ 142#define KERN_LWPSLOP (5 * sizeof(struct kinfo_lwp)) 143 144static int dcopyout(struct lwp *, const void *, void *, size_t); 145 146static int 147dcopyout(struct lwp *l, const void *kaddr, void *uaddr, size_t len) 148{ 149 int error; 150 151 error = copyout(kaddr, uaddr, len); 152 ktrmibio(-1, UIO_READ, uaddr, len, error); 153 154 return error; 155} 156 157#ifdef DIAGNOSTIC 158static int sysctl_kern_trigger_panic(SYSCTLFN_PROTO); 159#endif 160static int sysctl_kern_maxvnodes(SYSCTLFN_PROTO); 161static int sysctl_kern_rtc_offset(SYSCTLFN_PROTO); 162static int sysctl_kern_maxproc(SYSCTLFN_PROTO); 163static int sysctl_kern_hostid(SYSCTLFN_PROTO); 164static int sysctl_setlen(SYSCTLFN_PROTO); 165static int sysctl_kern_clockrate(SYSCTLFN_PROTO); 166static int sysctl_msgbuf(SYSCTLFN_PROTO); 167static int sysctl_kern_defcorename(SYSCTLFN_PROTO); 168static int sysctl_kern_cptime(SYSCTLFN_PROTO); 169#if NPTY > 0 170static int sysctl_kern_maxptys(SYSCTLFN_PROTO); 171#endif /* NPTY > 0 */ 172static int sysctl_kern_sbmax(SYSCTLFN_PROTO); 173static int sysctl_kern_urnd(SYSCTLFN_PROTO); 174static int sysctl_kern_arnd(SYSCTLFN_PROTO); 175static int sysctl_kern_lwp(SYSCTLFN_PROTO); 176static int sysctl_kern_forkfsleep(SYSCTLFN_PROTO); 177static int sysctl_kern_root_partition(SYSCTLFN_PROTO); 178static int sysctl_kern_drivers(SYSCTLFN_PROTO); 179static int sysctl_security_setidcore(SYSCTLFN_PROTO); 180static int sysctl_security_setidcorename(SYSCTLFN_PROTO); 181static int sysctl_kern_cpid(SYSCTLFN_PROTO); 182static int sysctl_hw_usermem(SYSCTLFN_PROTO); 183static int sysctl_hw_cnmagic(SYSCTLFN_PROTO); 184 185static void fill_lwp(struct lwp *l, struct kinfo_lwp *kl); 186 187/* 188 * ******************************************************************** 189 * section 1: setup routines 190 * ******************************************************************** 191 * These functions are stuffed into a link set for sysctl setup 192 * functions. They're never called or referenced from anywhere else. 193 * ******************************************************************** 194 */ 195 196/* 197 * this setup routine is a replacement for kern_sysctl() 198 */ 199SYSCTL_SETUP(sysctl_kern_setup, "sysctl kern subtree setup") 200{ 201 extern int kern_logsigexit; /* defined in kern/kern_sig.c */ 202 extern fixpt_t ccpu; /* defined in kern/kern_synch.c */ 203 extern int dumponpanic; /* defined in kern/subr_prf.c */ 204 const struct sysctlnode *rnode; 205 206 sysctl_createv(clog, 0, NULL, NULL, 207 CTLFLAG_PERMANENT, 208 CTLTYPE_NODE, "kern", NULL, 209 NULL, 0, NULL, 0, 210 CTL_KERN, CTL_EOL); 211 212 sysctl_createv(clog, 0, NULL, NULL, 213 CTLFLAG_PERMANENT, 214 CTLTYPE_STRING, "ostype", 215 SYSCTL_DESCR("Operating system type"), 216 NULL, 0, &ostype, 0, 217 CTL_KERN, KERN_OSTYPE, CTL_EOL); 218 sysctl_createv(clog, 0, NULL, NULL, 219 CTLFLAG_PERMANENT, 220 CTLTYPE_STRING, "osrelease", 221 SYSCTL_DESCR("Operating system release"), 222 NULL, 0, &osrelease, 0, 223 CTL_KERN, KERN_OSRELEASE, CTL_EOL); 224 sysctl_createv(clog, 0, NULL, NULL, 225 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 226 CTLTYPE_INT, "osrevision", 227 SYSCTL_DESCR("Operating system revision"), 228 NULL, __NetBSD_Version__, NULL, 0, 229 CTL_KERN, KERN_OSREV, CTL_EOL); 230 sysctl_createv(clog, 0, NULL, NULL, 231 CTLFLAG_PERMANENT, 232 CTLTYPE_STRING, "version", 233 SYSCTL_DESCR("Kernel version"), 234 NULL, 0, &version, 0, 235 CTL_KERN, KERN_VERSION, CTL_EOL); 236 sysctl_createv(clog, 0, NULL, NULL, 237 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 238 CTLTYPE_INT, "maxvnodes", 239 SYSCTL_DESCR("Maximum number of vnodes"), 240 sysctl_kern_maxvnodes, 0, NULL, 0, 241 CTL_KERN, KERN_MAXVNODES, CTL_EOL); 242 sysctl_createv(clog, 0, NULL, NULL, 243 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 244 CTLTYPE_INT, "maxproc", 245 SYSCTL_DESCR("Maximum number of simultaneous processes"), 246 sysctl_kern_maxproc, 0, NULL, 0, 247 CTL_KERN, KERN_MAXPROC, CTL_EOL); 248 sysctl_createv(clog, 0, NULL, NULL, 249 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 250 CTLTYPE_INT, "maxfiles", 251 SYSCTL_DESCR("Maximum number of open files"), 252 NULL, 0, &maxfiles, 0, 253 CTL_KERN, KERN_MAXFILES, CTL_EOL); 254 sysctl_createv(clog, 0, NULL, NULL, 255 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 256 CTLTYPE_INT, "argmax", 257 SYSCTL_DESCR("Maximum number of bytes of arguments to " 258 "execve(2)"), 259 NULL, ARG_MAX, NULL, 0, 260 CTL_KERN, KERN_ARGMAX, CTL_EOL); 261 sysctl_createv(clog, 0, NULL, NULL, 262 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 263 CTLTYPE_STRING, "hostname", 264 SYSCTL_DESCR("System hostname"), 265 sysctl_setlen, 0, &hostname, MAXHOSTNAMELEN, 266 CTL_KERN, KERN_HOSTNAME, CTL_EOL); 267 sysctl_createv(clog, 0, NULL, NULL, 268 CTLFLAG_PERMANENT|CTLFLAG_READWRITE|CTLFLAG_HEX, 269 CTLTYPE_INT, "hostid", 270 SYSCTL_DESCR("System host ID number"), 271 sysctl_kern_hostid, 0, NULL, 0, 272 CTL_KERN, KERN_HOSTID, CTL_EOL); 273 sysctl_createv(clog, 0, NULL, NULL, 274 CTLFLAG_PERMANENT, 275 CTLTYPE_STRUCT, "clockrate", 276 SYSCTL_DESCR("Kernel clock rates"), 277 sysctl_kern_clockrate, 0, NULL, 278 sizeof(struct clockinfo), 279 CTL_KERN, KERN_CLOCKRATE, CTL_EOL); 280 sysctl_createv(clog, 0, NULL, NULL, 281 CTLFLAG_PERMANENT, 282 CTLTYPE_INT, "hardclock_ticks", 283 SYSCTL_DESCR("Number of hardclock ticks"), 284 NULL, 0, &hardclock_ticks, sizeof(hardclock_ticks), 285 CTL_KERN, KERN_HARDCLOCK_TICKS, CTL_EOL); 286 sysctl_createv(clog, 0, NULL, NULL, 287 CTLFLAG_PERMANENT, 288 CTLTYPE_STRUCT, "vnode", 289 SYSCTL_DESCR("System vnode table"), 290 sysctl_kern_vnode, 0, NULL, 0, 291 CTL_KERN, KERN_VNODE, CTL_EOL); 292#ifndef GPROF 293 sysctl_createv(clog, 0, NULL, NULL, 294 CTLFLAG_PERMANENT, 295 CTLTYPE_NODE, "profiling", 296 SYSCTL_DESCR("Profiling information (not available)"), 297 sysctl_notavail, 0, NULL, 0, 298 CTL_KERN, KERN_PROF, CTL_EOL); 299#endif 300 sysctl_createv(clog, 0, NULL, NULL, 301 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 302 CTLTYPE_INT, "posix1version", 303 SYSCTL_DESCR("Version of ISO/IEC 9945 (POSIX 1003.1) " 304 "with which the operating system attempts " 305 "to comply"), 306 NULL, _POSIX_VERSION, NULL, 0, 307 CTL_KERN, KERN_POSIX1, CTL_EOL); 308 sysctl_createv(clog, 0, NULL, NULL, 309 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 310 CTLTYPE_INT, "ngroups", 311 SYSCTL_DESCR("Maximum number of supplemental groups"), 312 NULL, NGROUPS_MAX, NULL, 0, 313 CTL_KERN, KERN_NGROUPS, CTL_EOL); 314 sysctl_createv(clog, 0, NULL, NULL, 315 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 316 CTLTYPE_INT, "job_control", 317 SYSCTL_DESCR("Whether job control is available"), 318 NULL, 1, NULL, 0, 319 CTL_KERN, KERN_JOB_CONTROL, CTL_EOL); 320 sysctl_createv(clog, 0, NULL, NULL, 321 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 322 CTLTYPE_INT, "saved_ids", 323 SYSCTL_DESCR("Whether POSIX saved set-group/user ID is " 324 "available"), NULL, 325#ifdef _POSIX_SAVED_IDS 326 1, 327#else /* _POSIX_SAVED_IDS */ 328 0, 329#endif /* _POSIX_SAVED_IDS */ 330 NULL, 0, CTL_KERN, KERN_SAVED_IDS, CTL_EOL); 331 sysctl_createv(clog, 0, NULL, NULL, 332 CTLFLAG_PERMANENT|CTLFLAG_HEX, 333 CTLTYPE_INT, "boothowto", 334 SYSCTL_DESCR("Flags from boot loader"), 335 NULL, 0, &boothowto, sizeof(boothowto), 336 CTL_KERN, CTL_CREATE, CTL_EOL); 337 sysctl_createv(clog, 0, NULL, NULL, 338 CTLFLAG_PERMANENT, 339 CTLTYPE_STRUCT, "boottime", 340 SYSCTL_DESCR("System boot time"), 341 NULL, 0, &boottime, sizeof(boottime), 342 CTL_KERN, KERN_BOOTTIME, CTL_EOL); 343#ifdef COMPAT_50 344 { 345 extern struct timeval50 boottime50; 346 sysctl_createv(clog, 0, NULL, NULL, 347 CTLFLAG_PERMANENT, 348 CTLTYPE_STRUCT, "oboottime", 349 SYSCTL_DESCR("System boot time"), 350 NULL, 0, &boottime50, sizeof(boottime50), 351 CTL_KERN, KERN_OBOOTTIME, CTL_EOL); 352 } 353#endif 354 sysctl_createv(clog, 0, NULL, NULL, 355 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 356 CTLTYPE_STRING, "domainname", 357 SYSCTL_DESCR("YP domain name"), 358 sysctl_setlen, 0, &domainname, MAXHOSTNAMELEN, 359 CTL_KERN, KERN_DOMAINNAME, CTL_EOL); 360 sysctl_createv(clog, 0, NULL, NULL, 361 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 362 CTLTYPE_INT, "maxpartitions", 363 SYSCTL_DESCR("Maximum number of partitions allowed per " 364 "disk"), 365 NULL, MAXPARTITIONS, NULL, 0, 366 CTL_KERN, KERN_MAXPARTITIONS, CTL_EOL); 367 sysctl_createv(clog, 0, NULL, NULL, 368 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 369 CTLTYPE_INT, "rawpartition", 370 SYSCTL_DESCR("Raw partition of a disk"), 371 NULL, RAW_PART, NULL, 0, 372 CTL_KERN, KERN_RAWPARTITION, CTL_EOL); 373 sysctl_createv(clog, 0, NULL, NULL, 374 CTLFLAG_PERMANENT, 375 CTLTYPE_STRUCT, "timex", NULL, 376 sysctl_notavail, 0, NULL, 0, 377 CTL_KERN, KERN_TIMEX, CTL_EOL); 378 sysctl_createv(clog, 0, NULL, NULL, 379 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 380 CTLTYPE_INT, "rtc_offset", 381 SYSCTL_DESCR("Offset of real time clock from UTC in " 382 "minutes"), 383 sysctl_kern_rtc_offset, 0, &rtc_offset, 0, 384 CTL_KERN, KERN_RTC_OFFSET, CTL_EOL); 385 sysctl_createv(clog, 0, NULL, NULL, 386 CTLFLAG_PERMANENT, 387 CTLTYPE_STRING, "root_device", 388 SYSCTL_DESCR("Name of the root device"), 389 sysctl_root_device, 0, NULL, 0, 390 CTL_KERN, KERN_ROOT_DEVICE, CTL_EOL); 391 sysctl_createv(clog, 0, NULL, NULL, 392 CTLFLAG_PERMANENT, 393 CTLTYPE_INT, "msgbufsize", 394 SYSCTL_DESCR("Size of the kernel message buffer"), 395 sysctl_msgbuf, 0, NULL, 0, 396 CTL_KERN, KERN_MSGBUFSIZE, CTL_EOL); 397 sysctl_createv(clog, 0, NULL, NULL, 398 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 399 CTLTYPE_INT, "fsync", 400 SYSCTL_DESCR("Whether the POSIX 1003.1b File " 401 "Synchronization Option is available on " 402 "this system"), 403 NULL, 1, NULL, 0, 404 CTL_KERN, KERN_FSYNC, CTL_EOL); 405 sysctl_createv(clog, 0, NULL, NULL, 406 CTLFLAG_PERMANENT, 407 CTLTYPE_NODE, "ipc", 408 SYSCTL_DESCR("SysV IPC options"), 409 NULL, 0, NULL, 0, 410 CTL_KERN, KERN_SYSVIPC, CTL_EOL); 411 sysctl_createv(clog, 0, NULL, NULL, 412 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 413 CTLTYPE_INT, "sysvmsg", 414 SYSCTL_DESCR("System V style message support available"), 415 NULL, 416#ifdef SYSVMSG 417 1, 418#else /* SYSVMSG */ 419 0, 420#endif /* SYSVMSG */ 421 NULL, 0, CTL_KERN, KERN_SYSVIPC, KERN_SYSVIPC_MSG, CTL_EOL); 422 sysctl_createv(clog, 0, NULL, NULL, 423 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 424 CTLTYPE_INT, "sysvsem", 425 SYSCTL_DESCR("System V style semaphore support " 426 "available"), NULL, 427#ifdef SYSVSEM 428 1, 429#else /* SYSVSEM */ 430 0, 431#endif /* SYSVSEM */ 432 NULL, 0, CTL_KERN, KERN_SYSVIPC, KERN_SYSVIPC_SEM, CTL_EOL); 433 sysctl_createv(clog, 0, NULL, NULL, 434 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 435 CTLTYPE_INT, "sysvshm", 436 SYSCTL_DESCR("System V style shared memory support " 437 "available"), NULL, 438#ifdef SYSVSHM 439 1, 440#else /* SYSVSHM */ 441 0, 442#endif /* SYSVSHM */ 443 NULL, 0, CTL_KERN, KERN_SYSVIPC, KERN_SYSVIPC_SHM, CTL_EOL); 444 sysctl_createv(clog, 0, NULL, NULL, 445 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 446 CTLTYPE_INT, "synchronized_io", 447 SYSCTL_DESCR("Whether the POSIX 1003.1b Synchronized " 448 "I/O Option is available on this system"), 449 NULL, 1, NULL, 0, 450 CTL_KERN, KERN_SYNCHRONIZED_IO, CTL_EOL); 451 sysctl_createv(clog, 0, NULL, NULL, 452 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 453 CTLTYPE_INT, "iov_max", 454 SYSCTL_DESCR("Maximum number of iovec structures per " 455 "process"), 456 NULL, IOV_MAX, NULL, 0, 457 CTL_KERN, KERN_IOV_MAX, CTL_EOL); 458 sysctl_createv(clog, 0, NULL, NULL, 459 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 460 CTLTYPE_INT, "mapped_files", 461 SYSCTL_DESCR("Whether the POSIX 1003.1b Memory Mapped " 462 "Files Option is available on this system"), 463 NULL, 1, NULL, 0, 464 CTL_KERN, KERN_MAPPED_FILES, CTL_EOL); 465 sysctl_createv(clog, 0, NULL, NULL, 466 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 467 CTLTYPE_INT, "memlock", 468 SYSCTL_DESCR("Whether the POSIX 1003.1b Process Memory " 469 "Locking Option is available on this " 470 "system"), 471 NULL, 1, NULL, 0, 472 CTL_KERN, KERN_MEMLOCK, CTL_EOL); 473 sysctl_createv(clog, 0, NULL, NULL, 474 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 475 CTLTYPE_INT, "memlock_range", 476 SYSCTL_DESCR("Whether the POSIX 1003.1b Range Memory " 477 "Locking Option is available on this " 478 "system"), 479 NULL, 1, NULL, 0, 480 CTL_KERN, KERN_MEMLOCK_RANGE, CTL_EOL); 481 sysctl_createv(clog, 0, NULL, NULL, 482 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 483 CTLTYPE_INT, "memory_protection", 484 SYSCTL_DESCR("Whether the POSIX 1003.1b Memory " 485 "Protection Option is available on this " 486 "system"), 487 NULL, 1, NULL, 0, 488 CTL_KERN, KERN_MEMORY_PROTECTION, CTL_EOL); 489 sysctl_createv(clog, 0, NULL, NULL, 490 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 491 CTLTYPE_INT, "login_name_max", 492 SYSCTL_DESCR("Maximum login name length"), 493 NULL, LOGIN_NAME_MAX, NULL, 0, 494 CTL_KERN, KERN_LOGIN_NAME_MAX, CTL_EOL); 495 sysctl_createv(clog, 0, NULL, NULL, 496 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 497 CTLTYPE_STRING, "defcorename", 498 SYSCTL_DESCR("Default core file name"), 499 sysctl_kern_defcorename, 0, defcorename, MAXPATHLEN, 500 CTL_KERN, KERN_DEFCORENAME, CTL_EOL); 501 sysctl_createv(clog, 0, NULL, NULL, 502 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 503 CTLTYPE_INT, "logsigexit", 504 SYSCTL_DESCR("Log process exit when caused by signals"), 505 NULL, 0, &kern_logsigexit, 0, 506 CTL_KERN, KERN_LOGSIGEXIT, CTL_EOL); 507 sysctl_createv(clog, 0, NULL, NULL, 508 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 509 CTLTYPE_INT, "fscale", 510 SYSCTL_DESCR("Kernel fixed-point scale factor"), 511 NULL, FSCALE, NULL, 0, 512 CTL_KERN, KERN_FSCALE, CTL_EOL); 513 sysctl_createv(clog, 0, NULL, NULL, 514 CTLFLAG_PERMANENT, 515 CTLTYPE_INT, "ccpu", 516 SYSCTL_DESCR("Scheduler exponential decay value"), 517 NULL, 0, &ccpu, 0, 518 CTL_KERN, KERN_CCPU, CTL_EOL); 519 sysctl_createv(clog, 0, NULL, NULL, 520 CTLFLAG_PERMANENT, 521 CTLTYPE_STRUCT, "cp_time", 522 SYSCTL_DESCR("Clock ticks spent in different CPU states"), 523 sysctl_kern_cptime, 0, NULL, 0, 524 CTL_KERN, KERN_CP_TIME, CTL_EOL); 525 sysctl_createv(clog, 0, NULL, NULL, 526 CTLFLAG_PERMANENT, 527 CTLTYPE_INT, "msgbuf", 528 SYSCTL_DESCR("Kernel message buffer"), 529 sysctl_msgbuf, 0, NULL, 0, 530 CTL_KERN, KERN_MSGBUF, CTL_EOL); 531 sysctl_createv(clog, 0, NULL, NULL, 532 CTLFLAG_PERMANENT, 533 CTLTYPE_STRUCT, "consdev", 534 SYSCTL_DESCR("Console device"), 535 sysctl_consdev, 0, NULL, sizeof(dev_t), 536 CTL_KERN, KERN_CONSDEV, CTL_EOL); 537#if NPTY > 0 538 sysctl_createv(clog, 0, NULL, NULL, 539 CTLFLAG_PERMANENT, 540 CTLTYPE_INT, "maxptys", 541 SYSCTL_DESCR("Maximum number of pseudo-ttys"), 542 sysctl_kern_maxptys, 0, NULL, 0, 543 CTL_KERN, KERN_MAXPTYS, CTL_EOL); 544#endif /* NPTY > 0 */ 545 sysctl_createv(clog, 0, NULL, NULL, 546 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 547 CTLTYPE_INT, "maxphys", 548 SYSCTL_DESCR("Maximum raw I/O transfer size"), 549 NULL, MAXPHYS, NULL, 0, 550 CTL_KERN, KERN_MAXPHYS, CTL_EOL); 551 sysctl_createv(clog, 0, NULL, NULL, 552 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 553 CTLTYPE_INT, "sbmax", 554 SYSCTL_DESCR("Maximum socket buffer size"), 555 sysctl_kern_sbmax, 0, NULL, 0, 556 CTL_KERN, KERN_SBMAX, CTL_EOL); 557 sysctl_createv(clog, 0, NULL, NULL, 558 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 559 CTLTYPE_INT, "monotonic_clock", 560 SYSCTL_DESCR("Implementation version of the POSIX " 561 "1003.1b Monotonic Clock Option"), 562 /* XXX _POSIX_VERSION */ 563 NULL, _POSIX_MONOTONIC_CLOCK, NULL, 0, 564 CTL_KERN, KERN_MONOTONIC_CLOCK, CTL_EOL); 565 sysctl_createv(clog, 0, NULL, NULL, 566 CTLFLAG_PERMANENT, 567 CTLTYPE_INT, "urandom", 568 SYSCTL_DESCR("Random integer value"), 569 sysctl_kern_urnd, 0, NULL, 0, 570 CTL_KERN, KERN_URND, CTL_EOL); 571 sysctl_createv(clog, 0, NULL, NULL, 572 CTLFLAG_PERMANENT, 573 CTLTYPE_INT, "arandom", 574 SYSCTL_DESCR("n bytes of random data"), 575 sysctl_kern_arnd, 0, NULL, 0, 576 CTL_KERN, KERN_ARND, CTL_EOL); 577 sysctl_createv(clog, 0, NULL, NULL, 578 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 579 CTLTYPE_INT, "labelsector", 580 SYSCTL_DESCR("Sector number containing the disklabel"), 581 NULL, LABELSECTOR, NULL, 0, 582 CTL_KERN, KERN_LABELSECTOR, CTL_EOL); 583 sysctl_createv(clog, 0, NULL, NULL, 584 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 585 CTLTYPE_INT, "labeloffset", 586 SYSCTL_DESCR("Offset of the disklabel within the " 587 "sector"), 588 NULL, LABELOFFSET, NULL, 0, 589 CTL_KERN, KERN_LABELOFFSET, CTL_EOL); 590 sysctl_createv(clog, 0, NULL, NULL, 591 CTLFLAG_PERMANENT, 592 CTLTYPE_NODE, "lwp", 593 SYSCTL_DESCR("System-wide LWP information"), 594 sysctl_kern_lwp, 0, NULL, 0, 595 CTL_KERN, KERN_LWP, CTL_EOL); 596 sysctl_createv(clog, 0, NULL, NULL, 597 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 598 CTLTYPE_INT, "forkfsleep", 599 SYSCTL_DESCR("Milliseconds to sleep on fork failure due " 600 "to process limits"), 601 sysctl_kern_forkfsleep, 0, NULL, 0, 602 CTL_KERN, KERN_FORKFSLEEP, CTL_EOL); 603 sysctl_createv(clog, 0, NULL, NULL, 604 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 605 CTLTYPE_INT, "posix_threads", 606 SYSCTL_DESCR("Version of IEEE Std 1003.1 and its " 607 "Threads option to which the system " 608 "attempts to conform"), 609 /* XXX _POSIX_VERSION */ 610 NULL, _POSIX_THREADS, NULL, 0, 611 CTL_KERN, KERN_POSIX_THREADS, CTL_EOL); 612 sysctl_createv(clog, 0, NULL, NULL, 613 CTLFLAG_PERMANENT, 614 CTLTYPE_INT, "posix_semaphores", 615 SYSCTL_DESCR("Version of IEEE Std 1003.1 and its " 616 "Semaphores option to which the system " 617 "attempts to conform"), NULL, 618 0, &posix_semaphores, 619 0, CTL_KERN, KERN_POSIX_SEMAPHORES, CTL_EOL); 620 sysctl_createv(clog, 0, NULL, NULL, 621 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 622 CTLTYPE_INT, "posix_barriers", 623 SYSCTL_DESCR("Version of IEEE Std 1003.1 and its " 624 "Barriers option to which the system " 625 "attempts to conform"), 626 /* XXX _POSIX_VERSION */ 627 NULL, _POSIX_BARRIERS, NULL, 0, 628 CTL_KERN, KERN_POSIX_BARRIERS, CTL_EOL); 629 sysctl_createv(clog, 0, NULL, NULL, 630 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 631 CTLTYPE_INT, "posix_timers", 632 SYSCTL_DESCR("Version of IEEE Std 1003.1 and its " 633 "Timers option to which the system " 634 "attempts to conform"), 635 /* XXX _POSIX_VERSION */ 636 NULL, _POSIX_TIMERS, NULL, 0, 637 CTL_KERN, KERN_POSIX_TIMERS, CTL_EOL); 638 sysctl_createv(clog, 0, NULL, NULL, 639 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 640 CTLTYPE_INT, "posix_spin_locks", 641 SYSCTL_DESCR("Version of IEEE Std 1003.1 and its Spin " 642 "Locks option to which the system attempts " 643 "to conform"), 644 /* XXX _POSIX_VERSION */ 645 NULL, _POSIX_SPIN_LOCKS, NULL, 0, 646 CTL_KERN, KERN_POSIX_SPIN_LOCKS, CTL_EOL); 647 sysctl_createv(clog, 0, NULL, NULL, 648 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 649 CTLTYPE_INT, "posix_reader_writer_locks", 650 SYSCTL_DESCR("Version of IEEE Std 1003.1 and its " 651 "Read-Write Locks option to which the " 652 "system attempts to conform"), 653 /* XXX _POSIX_VERSION */ 654 NULL, _POSIX_READER_WRITER_LOCKS, NULL, 0, 655 CTL_KERN, KERN_POSIX_READER_WRITER_LOCKS, CTL_EOL); 656 sysctl_createv(clog, 0, NULL, NULL, 657 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 658 CTLTYPE_INT, "dump_on_panic", 659 SYSCTL_DESCR("Perform a crash dump on system panic"), 660 NULL, 0, &dumponpanic, 0, 661 CTL_KERN, KERN_DUMP_ON_PANIC, CTL_EOL); 662#ifdef DIAGNOSTIC 663 sysctl_createv(clog, 0, NULL, NULL, 664 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 665 CTLTYPE_INT, "panic_now", 666 SYSCTL_DESCR("Trigger a panic"), 667 sysctl_kern_trigger_panic, 0, NULL, 0, 668 CTL_KERN, CTL_CREATE, CTL_EOL); 669#endif 670 sysctl_createv(clog, 0, NULL, NULL, 671 CTLFLAG_PERMANENT, 672 CTLTYPE_INT, "root_partition", 673 SYSCTL_DESCR("Root partition on the root device"), 674 sysctl_kern_root_partition, 0, NULL, 0, 675 CTL_KERN, KERN_ROOT_PARTITION, CTL_EOL); 676 sysctl_createv(clog, 0, NULL, NULL, 677 CTLFLAG_PERMANENT, 678 CTLTYPE_STRUCT, "drivers", 679 SYSCTL_DESCR("List of all drivers with block and " 680 "character device numbers"), 681 sysctl_kern_drivers, 0, NULL, 0, 682 CTL_KERN, KERN_DRIVERS, CTL_EOL); 683 sysctl_createv(clog, 0, NULL, NULL, 684 CTLFLAG_PERMANENT, 685 CTLTYPE_STRUCT, "cp_id", 686 SYSCTL_DESCR("Mapping of CPU number to CPU id"), 687 sysctl_kern_cpid, 0, NULL, 0, 688 CTL_KERN, KERN_CP_ID, CTL_EOL); 689 sysctl_createv(clog, 0, NULL, &rnode, 690 CTLFLAG_PERMANENT, 691 CTLTYPE_NODE, "coredump", 692 SYSCTL_DESCR("Coredump settings."), 693 NULL, 0, NULL, 0, 694 CTL_KERN, CTL_CREATE, CTL_EOL); 695 sysctl_createv(clog, 0, &rnode, &rnode, 696 CTLFLAG_PERMANENT, 697 CTLTYPE_NODE, "setid", 698 SYSCTL_DESCR("Set-id processes' coredump settings."), 699 NULL, 0, NULL, 0, 700 CTL_CREATE, CTL_EOL); 701 sysctl_createv(clog, 0, &rnode, NULL, 702 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 703 CTLTYPE_INT, "dump", 704 SYSCTL_DESCR("Allow set-id processes to dump core."), 705 sysctl_security_setidcore, 0, &security_setidcore_dump, 706 sizeof(security_setidcore_dump), 707 CTL_CREATE, CTL_EOL); 708 sysctl_createv(clog, 0, &rnode, NULL, 709 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 710 CTLTYPE_STRING, "path", 711 SYSCTL_DESCR("Path pattern for set-id coredumps."), 712 sysctl_security_setidcorename, 0, 713 &security_setidcore_path, 714 sizeof(security_setidcore_path), 715 CTL_CREATE, CTL_EOL); 716 sysctl_createv(clog, 0, &rnode, NULL, 717 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 718 CTLTYPE_INT, "owner", 719 SYSCTL_DESCR("Owner id for set-id processes' cores."), 720 sysctl_security_setidcore, 0, &security_setidcore_owner, 721 0, 722 CTL_CREATE, CTL_EOL); 723 sysctl_createv(clog, 0, &rnode, NULL, 724 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 725 CTLTYPE_INT, "group", 726 SYSCTL_DESCR("Group id for set-id processes' cores."), 727 sysctl_security_setidcore, 0, &security_setidcore_group, 728 0, 729 CTL_CREATE, CTL_EOL); 730 sysctl_createv(clog, 0, &rnode, NULL, 731 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 732 CTLTYPE_INT, "mode", 733 SYSCTL_DESCR("Mode for set-id processes' cores."), 734 sysctl_security_setidcore, 0, &security_setidcore_mode, 735 0, 736 CTL_CREATE, CTL_EOL); 737 sysctl_createv(clog, 0, NULL, NULL, 738 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 739 CTLTYPE_INT, "no_sa_support", 740 SYSCTL_DESCR("0 if the kernel supports SA, otherwise " 741 "it doesn't"), 742 NULL, 743#ifdef KERN_SA 744 0, &sa_system_disabled, 745#else 746 1, NULL, 747#endif 748 0, 749 CTL_KERN, CTL_CREATE, CTL_EOL); 750 /* kern.posix. */ 751 sysctl_createv(clog, 0, NULL, &rnode, 752 CTLFLAG_PERMANENT, 753 CTLTYPE_NODE, "posix", 754 SYSCTL_DESCR("POSIX options"), 755 NULL, 0, NULL, 0, 756 CTL_KERN, CTL_CREATE, CTL_EOL); 757 sysctl_createv(clog, 0, &rnode, NULL, 758 CTLFLAG_PERMANENT | CTLFLAG_READWRITE, 759 CTLTYPE_INT, "semmax", 760 SYSCTL_DESCR("Maximal number of semaphores"), 761 NULL, 0, &ksem_max, 0, 762 CTL_CREATE, CTL_EOL); 763} 764 765SYSCTL_SETUP(sysctl_hw_setup, "sysctl hw subtree setup") 766{ 767 u_int u; 768 u_quad_t q; 769 770 sysctl_createv(clog, 0, NULL, NULL, 771 CTLFLAG_PERMANENT, 772 CTLTYPE_NODE, "hw", NULL, 773 NULL, 0, NULL, 0, 774 CTL_HW, CTL_EOL); 775 776 sysctl_createv(clog, 0, NULL, NULL, 777 CTLFLAG_PERMANENT, 778 CTLTYPE_STRING, "machine", 779 SYSCTL_DESCR("Machine class"), 780 NULL, 0, machine, 0, 781 CTL_HW, HW_MACHINE, CTL_EOL); 782 sysctl_createv(clog, 0, NULL, NULL, 783 CTLFLAG_PERMANENT, 784 CTLTYPE_STRING, "model", 785 SYSCTL_DESCR("Machine model"), 786 NULL, 0, cpu_model, 0, 787 CTL_HW, HW_MODEL, CTL_EOL); 788 sysctl_createv(clog, 0, NULL, NULL, 789 CTLFLAG_PERMANENT, 790 CTLTYPE_INT, "ncpu", 791 SYSCTL_DESCR("Number of CPUs configured"), 792 NULL, 0, &ncpu, 0, 793 CTL_HW, HW_NCPU, CTL_EOL); 794 sysctl_createv(clog, 0, NULL, NULL, 795 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 796 CTLTYPE_INT, "byteorder", 797 SYSCTL_DESCR("System byte order"), 798 NULL, BYTE_ORDER, NULL, 0, 799 CTL_HW, HW_BYTEORDER, CTL_EOL); 800 u = ((u_int)physmem > (UINT_MAX / PAGE_SIZE)) ? 801 UINT_MAX : physmem * PAGE_SIZE; 802 sysctl_createv(clog, 0, NULL, NULL, 803 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 804 CTLTYPE_INT, "physmem", 805 SYSCTL_DESCR("Bytes of physical memory"), 806 NULL, u, NULL, 0, 807 CTL_HW, HW_PHYSMEM, CTL_EOL); 808 sysctl_createv(clog, 0, NULL, NULL, 809 CTLFLAG_PERMANENT, 810 CTLTYPE_INT, "usermem", 811 SYSCTL_DESCR("Bytes of non-kernel memory"), 812 sysctl_hw_usermem, 0, NULL, 0, 813 CTL_HW, HW_USERMEM, CTL_EOL); 814 sysctl_createv(clog, 0, NULL, NULL, 815 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 816 CTLTYPE_INT, "pagesize", 817 SYSCTL_DESCR("Software page size"), 818 NULL, PAGE_SIZE, NULL, 0, 819 CTL_HW, HW_PAGESIZE, CTL_EOL); 820 sysctl_createv(clog, 0, NULL, NULL, 821 CTLFLAG_PERMANENT, 822 CTLTYPE_STRING, "machine_arch", 823 SYSCTL_DESCR("Machine CPU class"), 824 NULL, 0, machine_arch, 0, 825 CTL_HW, HW_MACHINE_ARCH, CTL_EOL); 826 sysctl_createv(clog, 0, NULL, NULL, 827 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 828 CTLTYPE_INT, "alignbytes", 829 SYSCTL_DESCR("Alignment constraint for all possible " 830 "data types"), 831 NULL, ALIGNBYTES, NULL, 0, 832 CTL_HW, HW_ALIGNBYTES, CTL_EOL); 833 sysctl_createv(clog, 0, NULL, NULL, 834 CTLFLAG_PERMANENT|CTLFLAG_READWRITE|CTLFLAG_HEX, 835 CTLTYPE_STRING, "cnmagic", 836 SYSCTL_DESCR("Console magic key sequence"), 837 sysctl_hw_cnmagic, 0, NULL, CNS_LEN, 838 CTL_HW, HW_CNMAGIC, CTL_EOL); 839 q = (u_quad_t)physmem * PAGE_SIZE; 840 sysctl_createv(clog, 0, NULL, NULL, 841 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 842 CTLTYPE_QUAD, "physmem64", 843 SYSCTL_DESCR("Bytes of physical memory"), 844 NULL, q, NULL, 0, 845 CTL_HW, HW_PHYSMEM64, CTL_EOL); 846 sysctl_createv(clog, 0, NULL, NULL, 847 CTLFLAG_PERMANENT, 848 CTLTYPE_QUAD, "usermem64", 849 SYSCTL_DESCR("Bytes of non-kernel memory"), 850 sysctl_hw_usermem, 0, NULL, 0, 851 CTL_HW, HW_USERMEM64, CTL_EOL); 852 sysctl_createv(clog, 0, NULL, NULL, 853 CTLFLAG_PERMANENT, 854 CTLTYPE_INT, "ncpuonline", 855 SYSCTL_DESCR("Number of CPUs online"), 856 NULL, 0, &ncpuonline, 0, 857 CTL_HW, HW_NCPUONLINE, CTL_EOL); 858} 859 860#ifdef DEBUG 861/* 862 * Debugging related system variables. 863 */ 864struct ctldebug /* debug0, */ /* debug1, */ debug2, debug3, debug4; 865struct ctldebug debug5, debug6, debug7, debug8, debug9; 866struct ctldebug debug10, debug11, debug12, debug13, debug14; 867struct ctldebug debug15, debug16, debug17, debug18, debug19; 868static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = { 869 &debug0, &debug1, &debug2, &debug3, &debug4, 870 &debug5, &debug6, &debug7, &debug8, &debug9, 871 &debug10, &debug11, &debug12, &debug13, &debug14, 872 &debug15, &debug16, &debug17, &debug18, &debug19, 873}; 874 875/* 876 * this setup routine is a replacement for debug_sysctl() 877 * 878 * note that it creates several nodes per defined debug variable 879 */ 880SYSCTL_SETUP(sysctl_debug_setup, "sysctl debug subtree setup") 881{ 882 struct ctldebug *cdp; 883 char nodename[20]; 884 int i; 885 886 /* 887 * two ways here: 888 * 889 * the "old" way (debug.name -> value) which was emulated by 890 * the sysctl(8) binary 891 * 892 * the new way, which the sysctl(8) binary was actually using 893 894 node debug 895 node debug.0 896 string debug.0.name 897 int debug.0.value 898 int debug.name 899 900 */ 901 902 sysctl_createv(clog, 0, NULL, NULL, 903 CTLFLAG_PERMANENT, 904 CTLTYPE_NODE, "debug", NULL, 905 NULL, 0, NULL, 0, 906 CTL_DEBUG, CTL_EOL); 907 908 for (i = 0; i < CTL_DEBUG_MAXID; i++) { 909 cdp = debugvars[i]; 910 if (cdp->debugname == NULL || cdp->debugvar == NULL) 911 continue; 912 913 snprintf(nodename, sizeof(nodename), "debug%d", i); 914 sysctl_createv(clog, 0, NULL, NULL, 915 CTLFLAG_PERMANENT|CTLFLAG_HIDDEN, 916 CTLTYPE_NODE, nodename, NULL, 917 NULL, 0, NULL, 0, 918 CTL_DEBUG, i, CTL_EOL); 919 sysctl_createv(clog, 0, NULL, NULL, 920 CTLFLAG_PERMANENT|CTLFLAG_HIDDEN, 921 CTLTYPE_STRING, "name", NULL, 922 /*XXXUNCONST*/ 923 NULL, 0, __UNCONST(cdp->debugname), 0, 924 CTL_DEBUG, i, CTL_DEBUG_NAME, CTL_EOL); 925 sysctl_createv(clog, 0, NULL, NULL, 926 CTLFLAG_PERMANENT|CTLFLAG_HIDDEN, 927 CTLTYPE_INT, "value", NULL, 928 NULL, 0, cdp->debugvar, 0, 929 CTL_DEBUG, i, CTL_DEBUG_VALUE, CTL_EOL); 930 sysctl_createv(clog, 0, NULL, NULL, 931 CTLFLAG_PERMANENT, 932 CTLTYPE_INT, cdp->debugname, NULL, 933 NULL, 0, cdp->debugvar, 0, 934 CTL_DEBUG, CTL_CREATE, CTL_EOL); 935 } 936} 937#endif /* DEBUG */ 938 939/* 940 * ******************************************************************** 941 * section 2: private node-specific helper routines. 942 * ******************************************************************** 943 */ 944 945#ifdef DIAGNOSTIC 946static int 947sysctl_kern_trigger_panic(SYSCTLFN_ARGS) 948{ 949 int newtrig, error; 950 struct sysctlnode node; 951 952 newtrig = 0; 953 node = *rnode; 954 node.sysctl_data = &newtrig; 955 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 956 if (error || newp == NULL) 957 return (error); 958 959 if (newtrig != 0) 960 panic("Panic triggered"); 961 962 return (error); 963} 964#endif 965 966/* 967 * sysctl helper routine for kern.maxvnodes. Drain vnodes if 968 * new value is lower than desiredvnodes and then calls reinit 969 * routines that needs to adjust to the new value. 970 */ 971static int 972sysctl_kern_maxvnodes(SYSCTLFN_ARGS) 973{ 974 int error, new_vnodes, old_vnodes, new_max; 975 struct sysctlnode node; 976 977 new_vnodes = desiredvnodes; 978 node = *rnode; 979 node.sysctl_data = &new_vnodes; 980 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 981 if (error || newp == NULL) 982 return (error); 983 984 /* Limits: 75% of KVA and physical memory. */ 985 new_max = calc_cache_size(kernel_map, 75, 75) / VNODE_COST; 986 if (new_vnodes > new_max) 987 new_vnodes = new_max; 988 989 old_vnodes = desiredvnodes; 990 desiredvnodes = new_vnodes; 991 if (new_vnodes < old_vnodes) { 992 error = vfs_drainvnodes(new_vnodes); 993 if (error) { 994 desiredvnodes = old_vnodes; 995 return (error); 996 } 997 } 998 vfs_reinit(); 999 nchreinit(); 1000 1001 return (0); 1002} 1003 1004/* 1005 * sysctl helper routine for rtc_offset - set time after changes 1006 */ 1007static int 1008sysctl_kern_rtc_offset(SYSCTLFN_ARGS) 1009{ 1010 struct timespec ts, delta; 1011 int error, new_rtc_offset; 1012 struct sysctlnode node; 1013 1014 new_rtc_offset = rtc_offset; 1015 node = *rnode; 1016 node.sysctl_data = &new_rtc_offset; 1017 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1018 if (error || newp == NULL) 1019 return (error); 1020 1021 if (kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_TIME, 1022 KAUTH_REQ_SYSTEM_TIME_RTCOFFSET, 1023 KAUTH_ARG(new_rtc_offset), NULL, NULL)) 1024 return (EPERM); 1025 if (rtc_offset == new_rtc_offset) 1026 return (0); 1027 1028 /* if we change the offset, adjust the time */ 1029 nanotime(&ts); 1030 delta.tv_sec = 60 * (new_rtc_offset - rtc_offset); 1031 delta.tv_nsec = 0; 1032 timespecadd(&ts, &delta, &ts); 1033 rtc_offset = new_rtc_offset; 1034 return (settime(l->l_proc, &ts)); 1035} 1036 1037/* 1038 * sysctl helper routine for kern.maxproc. Ensures that the new 1039 * values are not too low or too high. 1040 */ 1041static int 1042sysctl_kern_maxproc(SYSCTLFN_ARGS) 1043{ 1044 int error, nmaxproc; 1045 struct sysctlnode node; 1046 1047 nmaxproc = maxproc; 1048 node = *rnode; 1049 node.sysctl_data = &nmaxproc; 1050 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1051 if (error || newp == NULL) 1052 return (error); 1053 1054 if (nmaxproc < 0 || nmaxproc >= PID_MAX) 1055 return (EINVAL); 1056#ifdef __HAVE_CPU_MAXPROC 1057 if (nmaxproc > cpu_maxproc()) 1058 return (EINVAL); 1059#endif 1060 maxproc = nmaxproc; 1061 1062 return (0); 1063} 1064 1065/* 1066 * sysctl helper function for kern.hostid. The hostid is a long, but 1067 * we export it as an int, so we need to give it a little help. 1068 */ 1069static int 1070sysctl_kern_hostid(SYSCTLFN_ARGS) 1071{ 1072 int error, inthostid; 1073 struct sysctlnode node; 1074 1075 inthostid = hostid; /* XXX assumes sizeof int <= sizeof long */ 1076 node = *rnode; 1077 node.sysctl_data = &inthostid; 1078 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1079 if (error || newp == NULL) 1080 return (error); 1081 1082 hostid = (unsigned)inthostid; 1083 1084 return (0); 1085} 1086 1087/* 1088 * sysctl helper function for kern.hostname and kern.domainnname. 1089 * resets the relevant recorded length when the underlying name is 1090 * changed. 1091 */ 1092static int 1093sysctl_setlen(SYSCTLFN_ARGS) 1094{ 1095 int error; 1096 1097 error = sysctl_lookup(SYSCTLFN_CALL(rnode)); 1098 if (error || newp == NULL) 1099 return (error); 1100 1101 switch (rnode->sysctl_num) { 1102 case KERN_HOSTNAME: 1103 hostnamelen = strlen((const char*)rnode->sysctl_data); 1104 break; 1105 case KERN_DOMAINNAME: 1106 domainnamelen = strlen((const char*)rnode->sysctl_data); 1107 break; 1108 } 1109 1110 return (0); 1111} 1112 1113/* 1114 * sysctl helper routine for kern.clockrate. Assembles a struct on 1115 * the fly to be returned to the caller. 1116 */ 1117static int 1118sysctl_kern_clockrate(SYSCTLFN_ARGS) 1119{ 1120 struct clockinfo clkinfo; 1121 struct sysctlnode node; 1122 1123 clkinfo.tick = tick; 1124 clkinfo.tickadj = tickadj; 1125 clkinfo.hz = hz; 1126 clkinfo.profhz = profhz; 1127 clkinfo.stathz = stathz ? stathz : hz; 1128 1129 node = *rnode; 1130 node.sysctl_data = &clkinfo; 1131 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 1132} 1133 1134/* 1135 * sysctl helper routine for kern.msgbufsize and kern.msgbuf. For the 1136 * former it merely checks the message buffer is set up. For the latter, 1137 * it also copies out the data if necessary. 1138 */ 1139static int 1140sysctl_msgbuf(SYSCTLFN_ARGS) 1141{ 1142 char *where = oldp; 1143 size_t len, maxlen; 1144 long beg, end; 1145 extern kmutex_t log_lock; 1146 int error; 1147 1148 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 1149 msgbufenabled = 0; 1150 return (ENXIO); 1151 } 1152 1153 switch (rnode->sysctl_num) { 1154 case KERN_MSGBUFSIZE: { 1155 struct sysctlnode node = *rnode; 1156 int msg_bufs = (int)msgbufp->msg_bufs; 1157 node.sysctl_data = &msg_bufs; 1158 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 1159 } 1160 case KERN_MSGBUF: 1161 break; 1162 default: 1163 return (EOPNOTSUPP); 1164 } 1165 1166 if (newp != NULL) 1167 return (EPERM); 1168 1169 if (oldp == NULL) { 1170 /* always return full buffer size */ 1171 *oldlenp = msgbufp->msg_bufs; 1172 return (0); 1173 } 1174 1175 sysctl_unlock(); 1176 1177 /* 1178 * First, copy from the write pointer to the end of 1179 * message buffer. 1180 */ 1181 error = 0; 1182 mutex_spin_enter(&log_lock); 1183 maxlen = MIN(msgbufp->msg_bufs, *oldlenp); 1184 beg = msgbufp->msg_bufx; 1185 end = msgbufp->msg_bufs; 1186 mutex_spin_exit(&log_lock); 1187 1188 while (maxlen > 0) { 1189 len = MIN(end - beg, maxlen); 1190 if (len == 0) 1191 break; 1192 /* XXX unlocked, but hardly matters. */ 1193 error = dcopyout(l, &msgbufp->msg_bufc[beg], where, len); 1194 if (error) 1195 break; 1196 where += len; 1197 maxlen -= len; 1198 1199 /* 1200 * ... then, copy from the beginning of message buffer to 1201 * the write pointer. 1202 */ 1203 beg = 0; 1204 end = msgbufp->msg_bufx; 1205 } 1206 1207 sysctl_relock(); 1208 return (error); 1209} 1210 1211/* 1212 * sysctl helper routine for kern.defcorename. In the case of a new 1213 * string being assigned, check that it's not a zero-length string. 1214 * (XXX the check in -current doesn't work, but do we really care?) 1215 */ 1216static int 1217sysctl_kern_defcorename(SYSCTLFN_ARGS) 1218{ 1219 int error; 1220 char *newcorename; 1221 struct sysctlnode node; 1222 1223 newcorename = PNBUF_GET(); 1224 node = *rnode; 1225 node.sysctl_data = &newcorename[0]; 1226 memcpy(node.sysctl_data, rnode->sysctl_data, MAXPATHLEN); 1227 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1228 if (error || newp == NULL) { 1229 goto done; 1230 } 1231 1232 /* 1233 * when sysctl_lookup() deals with a string, it's guaranteed 1234 * to come back nul terminated. So there. :) 1235 */ 1236 if (strlen(newcorename) == 0) { 1237 error = EINVAL; 1238 } else { 1239 memcpy(rnode->sysctl_data, node.sysctl_data, MAXPATHLEN); 1240 error = 0; 1241 } 1242done: 1243 PNBUF_PUT(newcorename); 1244 return error; 1245} 1246 1247/* 1248 * sysctl helper routine for kern.cp_time node. Adds up cpu time 1249 * across all cpus. 1250 */ 1251static int 1252sysctl_kern_cptime(SYSCTLFN_ARGS) 1253{ 1254 struct sysctlnode node = *rnode; 1255 uint64_t *cp_time = NULL; 1256 int error, n = ncpu, i; 1257 struct cpu_info *ci; 1258 CPU_INFO_ITERATOR cii; 1259 1260 /* 1261 * if you specifically pass a buffer that is the size of the 1262 * sum, or if you are probing for the size, you get the "sum" 1263 * of cp_time (and the size thereof) across all processors. 1264 * 1265 * alternately, you can pass an additional mib number and get 1266 * cp_time for that particular processor. 1267 */ 1268 switch (namelen) { 1269 case 0: 1270 if (*oldlenp == sizeof(uint64_t) * CPUSTATES || oldp == NULL) { 1271 node.sysctl_size = sizeof(uint64_t) * CPUSTATES; 1272 n = -1; /* SUM */ 1273 } 1274 else { 1275 node.sysctl_size = n * sizeof(uint64_t) * CPUSTATES; 1276 n = -2; /* ALL */ 1277 } 1278 break; 1279 case 1: 1280 if (name[0] < 0 || name[0] >= n) 1281 return (ENOENT); /* ENOSUCHPROCESSOR */ 1282 node.sysctl_size = sizeof(uint64_t) * CPUSTATES; 1283 n = name[0]; 1284 /* 1285 * adjust these so that sysctl_lookup() will be happy 1286 */ 1287 name++; 1288 namelen--; 1289 break; 1290 default: 1291 return (EINVAL); 1292 } 1293 1294 cp_time = kmem_alloc(node.sysctl_size, KM_SLEEP); 1295 if (cp_time == NULL) 1296 return (ENOMEM); 1297 node.sysctl_data = cp_time; 1298 memset(cp_time, 0, node.sysctl_size); 1299 1300 for (CPU_INFO_FOREACH(cii, ci)) { 1301 if (n <= 0) { 1302 for (i = 0; i < CPUSTATES; i++) { 1303 cp_time[i] += ci->ci_schedstate.spc_cp_time[i]; 1304 } 1305 } 1306 /* 1307 * if a specific processor was requested and we just 1308 * did it, we're done here 1309 */ 1310 if (n == 0) 1311 break; 1312 /* 1313 * if doing "all", skip to next cp_time set for next processor 1314 */ 1315 if (n == -2) 1316 cp_time += CPUSTATES; 1317 /* 1318 * if we're doing a specific processor, we're one 1319 * processor closer 1320 */ 1321 if (n > 0) 1322 n--; 1323 } 1324 1325 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1326 kmem_free(node.sysctl_data, node.sysctl_size); 1327 return (error); 1328} 1329 1330#if NPTY > 0 1331/* 1332 * sysctl helper routine for kern.maxptys. Ensures that any new value 1333 * is acceptable to the pty subsystem. 1334 */ 1335static int 1336sysctl_kern_maxptys(SYSCTLFN_ARGS) 1337{ 1338 int pty_maxptys(int, int); /* defined in kern/tty_pty.c */ 1339 int error, xmax; 1340 struct sysctlnode node; 1341 1342 /* get current value of maxptys */ 1343 xmax = pty_maxptys(0, 0); 1344 1345 node = *rnode; 1346 node.sysctl_data = &xmax; 1347 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1348 if (error || newp == NULL) 1349 return (error); 1350 1351 if (xmax != pty_maxptys(xmax, 1)) 1352 return (EINVAL); 1353 1354 return (0); 1355} 1356#endif /* NPTY > 0 */ 1357 1358/* 1359 * sysctl helper routine for kern.sbmax. Basically just ensures that 1360 * any new value is not too small. 1361 */ 1362static int 1363sysctl_kern_sbmax(SYSCTLFN_ARGS) 1364{ 1365 int error, new_sbmax; 1366 struct sysctlnode node; 1367 1368 new_sbmax = sb_max; 1369 node = *rnode; 1370 node.sysctl_data = &new_sbmax; 1371 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1372 if (error || newp == NULL) 1373 return (error); 1374 1375 KERNEL_LOCK(1, NULL); 1376 error = sb_max_set(new_sbmax); 1377 KERNEL_UNLOCK_ONE(NULL); 1378 1379 return (error); 1380} 1381 1382/* 1383 * sysctl helper routine for kern.urandom node. Picks a random number 1384 * for you. 1385 */ 1386static int 1387sysctl_kern_urnd(SYSCTLFN_ARGS) 1388{ 1389#if NRND > 0 1390 int v, rv; 1391 1392 KERNEL_LOCK(1, NULL); 1393 rv = rnd_extract_data(&v, sizeof(v), RND_EXTRACT_ANY); 1394 KERNEL_UNLOCK_ONE(NULL); 1395 if (rv == sizeof(v)) { 1396 struct sysctlnode node = *rnode; 1397 node.sysctl_data = &v; 1398 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 1399 } 1400 else 1401 return (EIO); /*XXX*/ 1402#else 1403 return (EOPNOTSUPP); 1404#endif 1405} 1406 1407/* 1408 * sysctl helper routine for kern.arandom node. Picks a random number 1409 * for you. 1410 */ 1411static int 1412sysctl_kern_arnd(SYSCTLFN_ARGS) 1413{ 1414#if NRND > 0 1415 int error; 1416 void *v; 1417 struct sysctlnode node = *rnode; 1418 1419 if (*oldlenp == 0) 1420 return 0; 1421 if (*oldlenp > 8192) 1422 return E2BIG; 1423 1424 v = kmem_alloc(*oldlenp, KM_SLEEP); 1425 arc4randbytes(v, *oldlenp); 1426 node.sysctl_data = v; 1427 node.sysctl_size = *oldlenp; 1428 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1429 kmem_free(v, *oldlenp); 1430 return error; 1431#else 1432 return (EOPNOTSUPP); 1433#endif 1434} 1435/* 1436 * sysctl helper routine to do kern.lwp.* work. 1437 */ 1438static int 1439sysctl_kern_lwp(SYSCTLFN_ARGS) 1440{ 1441 struct kinfo_lwp klwp; 1442 struct proc *p; 1443 struct lwp *l2, *l3; 1444 char *where, *dp; 1445 int pid, elem_size, elem_count; 1446 int buflen, needed, error; 1447 bool gotit; 1448 1449 if (namelen == 1 && name[0] == CTL_QUERY) 1450 return (sysctl_query(SYSCTLFN_CALL(rnode))); 1451 1452 dp = where = oldp; 1453 buflen = where != NULL ? *oldlenp : 0; 1454 error = needed = 0; 1455 1456 if (newp != NULL || namelen != 3) 1457 return (EINVAL); 1458 pid = name[0]; 1459 elem_size = name[1]; 1460 elem_count = name[2]; 1461 1462 sysctl_unlock(); 1463 if (pid == -1) { 1464 mutex_enter(proc_lock); 1465 PROCLIST_FOREACH(p, &allproc) { 1466 /* Grab a hold on the process. */ 1467 if (!rw_tryenter(&p->p_reflock, RW_READER)) { 1468 continue; 1469 } 1470 mutex_exit(proc_lock); 1471 1472 mutex_enter(p->p_lock); 1473 LIST_FOREACH(l2, &p->p_lwps, l_sibling) { 1474 if (buflen >= elem_size && elem_count > 0) { 1475 lwp_lock(l2); 1476 fill_lwp(l2, &klwp); 1477 lwp_unlock(l2); 1478 mutex_exit(p->p_lock); 1479 1480 /* 1481 * Copy out elem_size, but not 1482 * larger than the size of a 1483 * struct kinfo_proc2. 1484 */ 1485 error = dcopyout(l, &klwp, dp, 1486 min(sizeof(klwp), elem_size)); 1487 if (error) { 1488 rw_exit(&p->p_reflock); 1489 goto cleanup; 1490 } 1491 mutex_enter(p->p_lock); 1492 LIST_FOREACH(l3, &p->p_lwps, 1493 l_sibling) { 1494 if (l2 == l3) 1495 break; 1496 } 1497 if (l3 == NULL) { 1498 mutex_exit(p->p_lock); 1499 rw_exit(&p->p_reflock); 1500 error = EAGAIN; 1501 goto cleanup; 1502 } 1503 dp += elem_size; 1504 buflen -= elem_size; 1505 elem_count--; 1506 } 1507 needed += elem_size; 1508 } 1509 mutex_exit(p->p_lock); 1510 1511 /* Drop reference to process. */ 1512 mutex_enter(proc_lock); 1513 rw_exit(&p->p_reflock); 1514 } 1515 mutex_exit(proc_lock); 1516 } else { 1517 mutex_enter(proc_lock); 1518 p = proc_find(pid); 1519 if (p == NULL) { 1520 error = ESRCH; 1521 mutex_exit(proc_lock); 1522 goto cleanup; 1523 } 1524 /* Grab a hold on the process. */ 1525 gotit = rw_tryenter(&p->p_reflock, RW_READER); 1526 mutex_exit(proc_lock); 1527 if (!gotit) { 1528 error = ESRCH; 1529 goto cleanup; 1530 } 1531 1532 mutex_enter(p->p_lock); 1533 LIST_FOREACH(l2, &p->p_lwps, l_sibling) { 1534 if (buflen >= elem_size && elem_count > 0) { 1535 lwp_lock(l2); 1536 fill_lwp(l2, &klwp); 1537 lwp_unlock(l2); 1538 mutex_exit(p->p_lock); 1539 /* 1540 * Copy out elem_size, but not larger than 1541 * the size of a struct kinfo_proc2. 1542 */ 1543 error = dcopyout(l, &klwp, dp, 1544 min(sizeof(klwp), elem_size)); 1545 if (error) { 1546 rw_exit(&p->p_reflock); 1547 goto cleanup; 1548 } 1549 mutex_enter(p->p_lock); 1550 LIST_FOREACH(l3, &p->p_lwps, l_sibling) { 1551 if (l2 == l3) 1552 break; 1553 } 1554 if (l3 == NULL) { 1555 mutex_exit(p->p_lock); 1556 rw_exit(&p->p_reflock); 1557 error = EAGAIN; 1558 goto cleanup; 1559 } 1560 dp += elem_size; 1561 buflen -= elem_size; 1562 elem_count--; 1563 } 1564 needed += elem_size; 1565 } 1566 mutex_exit(p->p_lock); 1567 1568 /* Drop reference to process. */ 1569 rw_exit(&p->p_reflock); 1570 } 1571 1572 if (where != NULL) { 1573 *oldlenp = dp - where; 1574 if (needed > *oldlenp) { 1575 sysctl_relock(); 1576 return (ENOMEM); 1577 } 1578 } else { 1579 needed += KERN_LWPSLOP; 1580 *oldlenp = needed; 1581 } 1582 error = 0; 1583 cleanup: 1584 sysctl_relock(); 1585 return (error); 1586} 1587 1588/* 1589 * sysctl helper routine for kern.forkfsleep node. Ensures that the 1590 * given value is not too large or two small, and is at least one 1591 * timer tick if not zero. 1592 */ 1593static int 1594sysctl_kern_forkfsleep(SYSCTLFN_ARGS) 1595{ 1596 /* userland sees value in ms, internally is in ticks */ 1597 extern int forkfsleep; /* defined in kern/kern_fork.c */ 1598 int error, timo, lsleep; 1599 struct sysctlnode node; 1600 1601 lsleep = forkfsleep * 1000 / hz; 1602 node = *rnode; 1603 node.sysctl_data = &lsleep; 1604 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1605 if (error || newp == NULL) 1606 return (error); 1607 1608 /* refuse negative values, and overly 'long time' */ 1609 if (lsleep < 0 || lsleep > MAXSLP * 1000) 1610 return (EINVAL); 1611 1612 timo = mstohz(lsleep); 1613 1614 /* if the interval is >0 ms && <1 tick, use 1 tick */ 1615 if (lsleep != 0 && timo == 0) 1616 forkfsleep = 1; 1617 else 1618 forkfsleep = timo; 1619 1620 return (0); 1621} 1622 1623/* 1624 * sysctl helper routine for kern.root_partition 1625 */ 1626static int 1627sysctl_kern_root_partition(SYSCTLFN_ARGS) 1628{ 1629 int rootpart = DISKPART(rootdev); 1630 struct sysctlnode node = *rnode; 1631 1632 node.sysctl_data = &rootpart; 1633 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 1634} 1635 1636/* 1637 * sysctl helper function for kern.drivers 1638 */ 1639static int 1640sysctl_kern_drivers(SYSCTLFN_ARGS) 1641{ 1642 int error; 1643 size_t buflen; 1644 struct kinfo_drivers kd; 1645 char *start, *where; 1646 const char *dname; 1647 int i; 1648 extern struct devsw_conv *devsw_conv; 1649 extern int max_devsw_convs; 1650 1651 if (newp != NULL || namelen != 0) 1652 return (EINVAL); 1653 1654 start = where = oldp; 1655 buflen = *oldlenp; 1656 if (where == NULL) { 1657 *oldlenp = max_devsw_convs * sizeof kd; 1658 return 0; 1659 } 1660 1661 /* 1662 * An array of kinfo_drivers structures 1663 */ 1664 error = 0; 1665 sysctl_unlock(); 1666 mutex_enter(&device_lock); 1667 for (i = 0; i < max_devsw_convs; i++) { 1668 dname = devsw_conv[i].d_name; 1669 if (dname == NULL) 1670 continue; 1671 if (buflen < sizeof kd) { 1672 error = ENOMEM; 1673 break; 1674 } 1675 memset(&kd, 0, sizeof(kd)); 1676 kd.d_bmajor = devsw_conv[i].d_bmajor; 1677 kd.d_cmajor = devsw_conv[i].d_cmajor; 1678 strlcpy(kd.d_name, dname, sizeof kd.d_name); 1679 mutex_exit(&device_lock); 1680 error = dcopyout(l, &kd, where, sizeof kd); 1681 mutex_enter(&device_lock); 1682 if (error != 0) 1683 break; 1684 buflen -= sizeof kd; 1685 where += sizeof kd; 1686 } 1687 mutex_exit(&device_lock); 1688 sysctl_relock(); 1689 *oldlenp = where - start; 1690 return error; 1691} 1692 1693static int 1694sysctl_security_setidcore(SYSCTLFN_ARGS) 1695{ 1696 int newsize, error; 1697 struct sysctlnode node; 1698 1699 node = *rnode; 1700 node.sysctl_data = &newsize; 1701 newsize = *(int *)rnode->sysctl_data; 1702 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1703 if (error || newp == NULL) 1704 return error; 1705 1706 if (kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_SETIDCORE, 1707 0, NULL, NULL, NULL)) 1708 return (EPERM); 1709 1710 *(int *)rnode->sysctl_data = newsize; 1711 1712 return 0; 1713} 1714 1715static int 1716sysctl_security_setidcorename(SYSCTLFN_ARGS) 1717{ 1718 int error; 1719 char *newsetidcorename; 1720 struct sysctlnode node; 1721 1722 newsetidcorename = PNBUF_GET(); 1723 node = *rnode; 1724 node.sysctl_data = newsetidcorename; 1725 memcpy(node.sysctl_data, rnode->sysctl_data, MAXPATHLEN); 1726 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1727 if (error || newp == NULL) { 1728 goto out; 1729 } 1730 if (kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_SETIDCORE, 1731 0, NULL, NULL, NULL)) { 1732 error = EPERM; 1733 goto out; 1734 } 1735 if (strlen(newsetidcorename) == 0) { 1736 error = EINVAL; 1737 goto out; 1738 } 1739 memcpy(rnode->sysctl_data, node.sysctl_data, MAXPATHLEN); 1740out: 1741 PNBUF_PUT(newsetidcorename); 1742 return error; 1743} 1744 1745/* 1746 * sysctl helper routine for kern.cp_id node. Maps cpus to their 1747 * cpuids. 1748 */ 1749static int 1750sysctl_kern_cpid(SYSCTLFN_ARGS) 1751{ 1752 struct sysctlnode node = *rnode; 1753 uint64_t *cp_id = NULL; 1754 int error, n = ncpu; 1755 struct cpu_info *ci; 1756 CPU_INFO_ITERATOR cii; 1757 1758 /* 1759 * Here you may either retrieve a single cpu id or the whole 1760 * set. The size you get back when probing depends on what 1761 * you ask for. 1762 */ 1763 switch (namelen) { 1764 case 0: 1765 node.sysctl_size = n * sizeof(uint64_t); 1766 n = -2; /* ALL */ 1767 break; 1768 case 1: 1769 if (name[0] < 0 || name[0] >= n) 1770 return (ENOENT); /* ENOSUCHPROCESSOR */ 1771 node.sysctl_size = sizeof(uint64_t); 1772 n = name[0]; 1773 /* 1774 * adjust these so that sysctl_lookup() will be happy 1775 */ 1776 name++; 1777 namelen--; 1778 break; 1779 default: 1780 return (EINVAL); 1781 } 1782 1783 cp_id = kmem_alloc(node.sysctl_size, KM_SLEEP); 1784 if (cp_id == NULL) 1785 return (ENOMEM); 1786 node.sysctl_data = cp_id; 1787 memset(cp_id, 0, node.sysctl_size); 1788 1789 for (CPU_INFO_FOREACH(cii, ci)) { 1790 if (n <= 0) 1791 cp_id[0] = cpu_index(ci); 1792 /* 1793 * if a specific processor was requested and we just 1794 * did it, we're done here 1795 */ 1796 if (n == 0) 1797 break; 1798 /* 1799 * if doing "all", skip to next cp_id slot for next processor 1800 */ 1801 if (n == -2) 1802 cp_id++; 1803 /* 1804 * if we're doing a specific processor, we're one 1805 * processor closer 1806 */ 1807 if (n > 0) 1808 n--; 1809 } 1810 1811 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1812 kmem_free(node.sysctl_data, node.sysctl_size); 1813 return (error); 1814} 1815 1816/* 1817 * sysctl helper routine for hw.usermem and hw.usermem64. Values are 1818 * calculate on the fly taking into account integer overflow and the 1819 * current wired count. 1820 */ 1821static int 1822sysctl_hw_usermem(SYSCTLFN_ARGS) 1823{ 1824 u_int ui; 1825 u_quad_t uq; 1826 struct sysctlnode node; 1827 1828 node = *rnode; 1829 switch (rnode->sysctl_num) { 1830 case HW_USERMEM: 1831 if ((ui = physmem - uvmexp.wired) > (UINT_MAX / PAGE_SIZE)) 1832 ui = UINT_MAX; 1833 else 1834 ui *= PAGE_SIZE; 1835 node.sysctl_data = &ui; 1836 break; 1837 case HW_USERMEM64: 1838 uq = (u_quad_t)(physmem - uvmexp.wired) * PAGE_SIZE; 1839 node.sysctl_data = &uq; 1840 break; 1841 default: 1842 return (EINVAL); 1843 } 1844 1845 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 1846} 1847 1848/* 1849 * sysctl helper routine for kern.cnmagic node. Pulls the old value 1850 * out, encoded, and stuffs the new value in for decoding. 1851 */ 1852static int 1853sysctl_hw_cnmagic(SYSCTLFN_ARGS) 1854{ 1855 char magic[CNS_LEN]; 1856 int error; 1857 struct sysctlnode node; 1858 1859 if (oldp) 1860 cn_get_magic(magic, CNS_LEN); 1861 node = *rnode; 1862 node.sysctl_data = &magic[0]; 1863 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1864 if (error || newp == NULL) 1865 return (error); 1866 1867 return (cn_set_magic(magic)); 1868} 1869 1870/* 1871 * ******************************************************************** 1872 * section 3: public helper routines that are used for more than one 1873 * node 1874 * ******************************************************************** 1875 */ 1876 1877/* 1878 * sysctl helper routine for the kern.root_device node and some ports' 1879 * machdep.root_device nodes. 1880 */ 1881int 1882sysctl_root_device(SYSCTLFN_ARGS) 1883{ 1884 struct sysctlnode node; 1885 1886 node = *rnode; 1887 node.sysctl_data = root_device->dv_xname; 1888 node.sysctl_size = strlen(device_xname(root_device)) + 1; 1889 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 1890} 1891 1892/* 1893 * sysctl helper routine for kern.consdev, dependent on the current 1894 * state of the console. Also used for machdep.console_device on some 1895 * ports. 1896 */ 1897int 1898sysctl_consdev(SYSCTLFN_ARGS) 1899{ 1900 dev_t consdev; 1901 uint32_t oconsdev; 1902 struct sysctlnode node; 1903 1904 if (cn_tab != NULL) 1905 consdev = cn_tab->cn_dev; 1906 else 1907 consdev = NODEV; 1908 node = *rnode; 1909 switch (*oldlenp) { 1910 case sizeof(consdev): 1911 node.sysctl_data = &consdev; 1912 node.sysctl_size = sizeof(consdev); 1913 break; 1914 case sizeof(oconsdev): 1915 oconsdev = (uint32_t)consdev; 1916 node.sysctl_data = &oconsdev; 1917 node.sysctl_size = sizeof(oconsdev); 1918 break; 1919 default: 1920 return EINVAL; 1921 } 1922 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 1923} 1924 1925/* 1926 * ******************************************************************** 1927 * section 4: support for some helpers 1928 * ******************************************************************** 1929 */ 1930 1931 1932/* 1933 * Fill in a kinfo_lwp structure for the specified lwp. 1934 */ 1935static void 1936fill_lwp(struct lwp *l, struct kinfo_lwp *kl) 1937{ 1938 struct proc *p = l->l_proc; 1939 struct timeval tv; 1940 1941 KASSERT(lwp_locked(l, NULL)); 1942 1943 memset(kl, 0, sizeof(*kl)); 1944 1945 kl->l_forw = 0; 1946 kl->l_back = 0; 1947 kl->l_laddr = PTRTOUINT64(l); 1948 kl->l_addr = PTRTOUINT64(l->l_addr); 1949 kl->l_stat = l->l_stat; 1950 kl->l_lid = l->l_lid; 1951 kl->l_flag = L_INMEM; 1952 kl->l_flag |= sysctl_map_flags(sysctl_lwpprflagmap, l->l_prflag); 1953 kl->l_flag |= sysctl_map_flags(sysctl_lwpflagmap, l->l_flag); 1954 1955 kl->l_swtime = l->l_swtime; 1956 kl->l_slptime = l->l_slptime; 1957 if (l->l_stat == LSONPROC) 1958 kl->l_schedflags = l->l_cpu->ci_schedstate.spc_flags; 1959 else 1960 kl->l_schedflags = 0; 1961 kl->l_priority = lwp_eprio(l); 1962 kl->l_usrpri = l->l_priority; 1963 if (l->l_wchan) 1964 strncpy(kl->l_wmesg, l->l_wmesg, sizeof(kl->l_wmesg)); 1965 kl->l_wchan = PTRTOUINT64(l->l_wchan); 1966 kl->l_cpuid = cpu_index(l->l_cpu); 1967 bintime2timeval(&l->l_rtime, &tv); 1968 kl->l_rtime_sec = tv.tv_sec; 1969 kl->l_rtime_usec = tv.tv_usec; 1970 kl->l_cpticks = l->l_cpticks; 1971 kl->l_pctcpu = l->l_pctcpu; 1972 kl->l_pid = p->p_pid; 1973 if (l->l_name == NULL) 1974 kl->l_name[0] = '\0'; 1975 else 1976 strlcpy(kl->l_name, l->l_name, sizeof(kl->l_name)); 1977} 1978