init_sysctl.c revision 1.188
1 /* $NetBSD: init_sysctl.c,v 1.188 2012/03/10 21:51:59 joerg 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 1.188 2012/03/10 21:51:59 joerg Exp $"); 34 35 #include "opt_sysv.h" 36 #include "opt_compat_netbsd.h" 37 #include "opt_modular.h" 38 #include "pty.h" 39 40 #include <sys/types.h> 41 #include <sys/param.h> 42 #include <sys/sysctl.h> 43 #include <sys/cpu.h> 44 #include <sys/errno.h> 45 #include <sys/systm.h> 46 #include <sys/kernel.h> 47 #include <sys/unistd.h> 48 #include <sys/disklabel.h> 49 #include <sys/cprng.h> 50 #include <sys/vnode.h> 51 #include <sys/mount.h> 52 #include <sys/namei.h> 53 #include <sys/msgbuf.h> 54 #include <dev/cons.h> 55 #include <sys/socketvar.h> 56 #include <sys/file.h> 57 #include <sys/filedesc.h> 58 #include <sys/tty.h> 59 #include <sys/kmem.h> 60 #include <sys/resource.h> 61 #include <sys/resourcevar.h> 62 #include <sys/exec.h> 63 #include <sys/conf.h> 64 #include <sys/device.h> 65 #include <sys/stat.h> 66 #include <sys/kauth.h> 67 #include <sys/ktrace.h> 68 #include <sys/ksem.h> 69 70 #ifdef COMPAT_50 71 #include <compat/sys/time.h> 72 #endif 73 74 #include <sys/cpu.h> 75 76 int security_setidcore_dump; 77 char security_setidcore_path[MAXPATHLEN] = "/var/crash/%n.core"; 78 uid_t security_setidcore_owner = 0; 79 gid_t security_setidcore_group = 0; 80 mode_t security_setidcore_mode = (S_IRUSR|S_IWUSR); 81 82 static const u_int sysctl_flagmap[] = { 83 PK_ADVLOCK, P_ADVLOCK, 84 PK_EXEC, P_EXEC, 85 PK_NOCLDWAIT, P_NOCLDWAIT, 86 PK_32, P_32, 87 PK_CLDSIGIGN, P_CLDSIGIGN, 88 PK_SUGID, P_SUGID, 89 0 90 }; 91 92 static const u_int sysctl_sflagmap[] = { 93 PS_NOCLDSTOP, P_NOCLDSTOP, 94 PS_WEXIT, P_WEXIT, 95 PS_STOPFORK, P_STOPFORK, 96 PS_STOPEXEC, P_STOPEXEC, 97 PS_STOPEXIT, P_STOPEXIT, 98 0 99 }; 100 101 static const u_int sysctl_slflagmap[] = { 102 PSL_TRACED, P_TRACED, 103 PSL_FSTRACE, P_FSTRACE, 104 PSL_CHTRACED, P_CHTRACED, 105 PSL_SYSCALL, P_SYSCALL, 106 0 107 }; 108 109 static const u_int sysctl_lflagmap[] = { 110 PL_CONTROLT, P_CONTROLT, 111 PL_PPWAIT, P_PPWAIT, 112 0 113 }; 114 115 static const u_int sysctl_stflagmap[] = { 116 PST_PROFIL, P_PROFIL, 117 0 118 119 }; 120 121 static const u_int sysctl_lwpprflagmap[] = { 122 LPR_DETACHED, L_DETACHED, 123 0 124 }; 125 126 /* 127 * try over estimating by 5 procs/lwps 128 */ 129 #define KERN_LWPSLOP (5 * sizeof(struct kinfo_lwp)) 130 131 static int dcopyout(struct lwp *, const void *, void *, size_t); 132 133 static int 134 dcopyout(struct lwp *l, const void *kaddr, void *uaddr, size_t len) 135 { 136 int error; 137 138 error = copyout(kaddr, uaddr, len); 139 ktrmibio(-1, UIO_READ, uaddr, len, error); 140 141 return error; 142 } 143 144 #ifdef DIAGNOSTIC 145 static int sysctl_kern_trigger_panic(SYSCTLFN_PROTO); 146 #endif 147 static int sysctl_kern_maxvnodes(SYSCTLFN_PROTO); 148 static int sysctl_kern_rtc_offset(SYSCTLFN_PROTO); 149 static int sysctl_kern_maxproc(SYSCTLFN_PROTO); 150 static int sysctl_kern_hostid(SYSCTLFN_PROTO); 151 static int sysctl_setlen(SYSCTLFN_PROTO); 152 static int sysctl_kern_clockrate(SYSCTLFN_PROTO); 153 static int sysctl_msgbuf(SYSCTLFN_PROTO); 154 static int sysctl_kern_defcorename(SYSCTLFN_PROTO); 155 static int sysctl_kern_cptime(SYSCTLFN_PROTO); 156 #if NPTY > 0 157 static int sysctl_kern_maxptys(SYSCTLFN_PROTO); 158 #endif /* NPTY > 0 */ 159 static int sysctl_kern_sbmax(SYSCTLFN_PROTO); 160 static int sysctl_kern_urnd(SYSCTLFN_PROTO); 161 static int sysctl_kern_arnd(SYSCTLFN_PROTO); 162 static int sysctl_kern_lwp(SYSCTLFN_PROTO); 163 static int sysctl_kern_forkfsleep(SYSCTLFN_PROTO); 164 static int sysctl_kern_root_partition(SYSCTLFN_PROTO); 165 static int sysctl_kern_drivers(SYSCTLFN_PROTO); 166 static int sysctl_security_setidcore(SYSCTLFN_PROTO); 167 static int sysctl_security_setidcorename(SYSCTLFN_PROTO); 168 static int sysctl_kern_cpid(SYSCTLFN_PROTO); 169 static int sysctl_hw_usermem(SYSCTLFN_PROTO); 170 static int sysctl_hw_cnmagic(SYSCTLFN_PROTO); 171 172 static void fill_lwp(struct lwp *l, struct kinfo_lwp *kl); 173 174 /* 175 * ******************************************************************** 176 * section 1: setup routines 177 * ******************************************************************** 178 * These functions are stuffed into a link set for sysctl setup 179 * functions. They're never called or referenced from anywhere else. 180 * ******************************************************************** 181 */ 182 183 /* 184 * this setup routine is a replacement for kern_sysctl() 185 */ 186 SYSCTL_SETUP(sysctl_kern_setup, "sysctl kern subtree setup") 187 { 188 extern int kern_logsigexit; /* defined in kern/kern_sig.c */ 189 extern fixpt_t ccpu; /* defined in kern/kern_synch.c */ 190 extern int dumponpanic; /* defined in kern/subr_prf.c */ 191 const struct sysctlnode *rnode; 192 193 sysctl_createv(clog, 0, NULL, NULL, 194 CTLFLAG_PERMANENT, 195 CTLTYPE_NODE, "kern", NULL, 196 NULL, 0, NULL, 0, 197 CTL_KERN, CTL_EOL); 198 199 sysctl_createv(clog, 0, NULL, NULL, 200 CTLFLAG_PERMANENT, 201 CTLTYPE_STRING, "ostype", 202 SYSCTL_DESCR("Operating system type"), 203 NULL, 0, __UNCONST(&ostype), 0, 204 CTL_KERN, KERN_OSTYPE, CTL_EOL); 205 sysctl_createv(clog, 0, NULL, NULL, 206 CTLFLAG_PERMANENT, 207 CTLTYPE_STRING, "osrelease", 208 SYSCTL_DESCR("Operating system release"), 209 NULL, 0, __UNCONST(&osrelease), 0, 210 CTL_KERN, KERN_OSRELEASE, CTL_EOL); 211 sysctl_createv(clog, 0, NULL, NULL, 212 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 213 CTLTYPE_INT, "osrevision", 214 SYSCTL_DESCR("Operating system revision"), 215 NULL, __NetBSD_Version__, NULL, 0, 216 CTL_KERN, KERN_OSREV, CTL_EOL); 217 sysctl_createv(clog, 0, NULL, NULL, 218 CTLFLAG_PERMANENT, 219 CTLTYPE_STRING, "version", 220 SYSCTL_DESCR("Kernel version"), 221 NULL, 0, __UNCONST(&version), 0, 222 CTL_KERN, KERN_VERSION, CTL_EOL); 223 sysctl_createv(clog, 0, NULL, NULL, 224 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 225 CTLTYPE_INT, "maxvnodes", 226 SYSCTL_DESCR("Maximum number of vnodes"), 227 sysctl_kern_maxvnodes, 0, NULL, 0, 228 CTL_KERN, KERN_MAXVNODES, CTL_EOL); 229 sysctl_createv(clog, 0, NULL, NULL, 230 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 231 CTLTYPE_INT, "maxproc", 232 SYSCTL_DESCR("Maximum number of simultaneous processes"), 233 sysctl_kern_maxproc, 0, NULL, 0, 234 CTL_KERN, KERN_MAXPROC, CTL_EOL); 235 sysctl_createv(clog, 0, NULL, NULL, 236 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 237 CTLTYPE_INT, "maxfiles", 238 SYSCTL_DESCR("Maximum number of open files"), 239 NULL, 0, &maxfiles, 0, 240 CTL_KERN, KERN_MAXFILES, CTL_EOL); 241 sysctl_createv(clog, 0, NULL, NULL, 242 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 243 CTLTYPE_INT, "argmax", 244 SYSCTL_DESCR("Maximum number of bytes of arguments to " 245 "execve(2)"), 246 NULL, ARG_MAX, NULL, 0, 247 CTL_KERN, KERN_ARGMAX, CTL_EOL); 248 sysctl_createv(clog, 0, NULL, NULL, 249 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 250 CTLTYPE_STRING, "hostname", 251 SYSCTL_DESCR("System hostname"), 252 sysctl_setlen, 0, &hostname, MAXHOSTNAMELEN, 253 CTL_KERN, KERN_HOSTNAME, CTL_EOL); 254 sysctl_createv(clog, 0, NULL, NULL, 255 CTLFLAG_PERMANENT|CTLFLAG_READWRITE|CTLFLAG_HEX, 256 CTLTYPE_INT, "hostid", 257 SYSCTL_DESCR("System host ID number"), 258 sysctl_kern_hostid, 0, NULL, 0, 259 CTL_KERN, KERN_HOSTID, CTL_EOL); 260 sysctl_createv(clog, 0, NULL, NULL, 261 CTLFLAG_PERMANENT, 262 CTLTYPE_STRUCT, "clockrate", 263 SYSCTL_DESCR("Kernel clock rates"), 264 sysctl_kern_clockrate, 0, NULL, 265 sizeof(struct clockinfo), 266 CTL_KERN, KERN_CLOCKRATE, CTL_EOL); 267 sysctl_createv(clog, 0, NULL, NULL, 268 CTLFLAG_PERMANENT, 269 CTLTYPE_INT, "hardclock_ticks", 270 SYSCTL_DESCR("Number of hardclock ticks"), 271 NULL, 0, &hardclock_ticks, sizeof(hardclock_ticks), 272 CTL_KERN, KERN_HARDCLOCK_TICKS, CTL_EOL); 273 sysctl_createv(clog, 0, NULL, NULL, 274 CTLFLAG_PERMANENT, 275 CTLTYPE_STRUCT, "vnode", 276 SYSCTL_DESCR("System vnode table"), 277 sysctl_kern_vnode, 0, NULL, 0, 278 CTL_KERN, KERN_VNODE, CTL_EOL); 279 #ifndef GPROF 280 sysctl_createv(clog, 0, NULL, NULL, 281 CTLFLAG_PERMANENT, 282 CTLTYPE_NODE, "profiling", 283 SYSCTL_DESCR("Profiling information (not available)"), 284 sysctl_notavail, 0, NULL, 0, 285 CTL_KERN, KERN_PROF, CTL_EOL); 286 #endif 287 sysctl_createv(clog, 0, NULL, NULL, 288 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 289 CTLTYPE_INT, "posix1version", 290 SYSCTL_DESCR("Version of ISO/IEC 9945 (POSIX 1003.1) " 291 "with which the operating system attempts " 292 "to comply"), 293 NULL, _POSIX_VERSION, NULL, 0, 294 CTL_KERN, KERN_POSIX1, CTL_EOL); 295 sysctl_createv(clog, 0, NULL, NULL, 296 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 297 CTLTYPE_INT, "ngroups", 298 SYSCTL_DESCR("Maximum number of supplemental groups"), 299 NULL, NGROUPS_MAX, NULL, 0, 300 CTL_KERN, KERN_NGROUPS, CTL_EOL); 301 sysctl_createv(clog, 0, NULL, NULL, 302 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 303 CTLTYPE_INT, "job_control", 304 SYSCTL_DESCR("Whether job control is available"), 305 NULL, 1, NULL, 0, 306 CTL_KERN, KERN_JOB_CONTROL, CTL_EOL); 307 sysctl_createv(clog, 0, NULL, NULL, 308 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 309 CTLTYPE_INT, "saved_ids", 310 SYSCTL_DESCR("Whether POSIX saved set-group/user ID is " 311 "available"), NULL, 312 #ifdef _POSIX_SAVED_IDS 313 1, 314 #else /* _POSIX_SAVED_IDS */ 315 0, 316 #endif /* _POSIX_SAVED_IDS */ 317 NULL, 0, CTL_KERN, KERN_SAVED_IDS, CTL_EOL); 318 sysctl_createv(clog, 0, NULL, NULL, 319 CTLFLAG_PERMANENT|CTLFLAG_HEX, 320 CTLTYPE_INT, "boothowto", 321 SYSCTL_DESCR("Flags from boot loader"), 322 NULL, 0, &boothowto, sizeof(boothowto), 323 CTL_KERN, CTL_CREATE, CTL_EOL); 324 sysctl_createv(clog, 0, NULL, NULL, 325 CTLFLAG_PERMANENT, 326 CTLTYPE_STRUCT, "boottime", 327 SYSCTL_DESCR("System boot time"), 328 NULL, 0, &boottime, sizeof(boottime), 329 CTL_KERN, KERN_BOOTTIME, CTL_EOL); 330 #ifdef COMPAT_50 331 { 332 extern struct timeval50 boottime50; 333 sysctl_createv(clog, 0, NULL, NULL, 334 CTLFLAG_PERMANENT, 335 CTLTYPE_STRUCT, "oboottime", 336 SYSCTL_DESCR("System boot time"), 337 NULL, 0, &boottime50, sizeof(boottime50), 338 CTL_KERN, KERN_OBOOTTIME, CTL_EOL); 339 } 340 #endif 341 sysctl_createv(clog, 0, NULL, NULL, 342 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 343 CTLTYPE_STRING, "domainname", 344 SYSCTL_DESCR("YP domain name"), 345 sysctl_setlen, 0, &domainname, MAXHOSTNAMELEN, 346 CTL_KERN, KERN_DOMAINNAME, CTL_EOL); 347 sysctl_createv(clog, 0, NULL, NULL, 348 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 349 CTLTYPE_INT, "maxpartitions", 350 SYSCTL_DESCR("Maximum number of partitions allowed per " 351 "disk"), 352 NULL, MAXPARTITIONS, NULL, 0, 353 CTL_KERN, KERN_MAXPARTITIONS, CTL_EOL); 354 sysctl_createv(clog, 0, NULL, NULL, 355 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 356 CTLTYPE_INT, "rawpartition", 357 SYSCTL_DESCR("Raw partition of a disk"), 358 NULL, RAW_PART, NULL, 0, 359 CTL_KERN, KERN_RAWPARTITION, CTL_EOL); 360 sysctl_createv(clog, 0, NULL, NULL, 361 CTLFLAG_PERMANENT, 362 CTLTYPE_STRUCT, "timex", NULL, 363 sysctl_notavail, 0, NULL, 0, 364 CTL_KERN, KERN_TIMEX, CTL_EOL); 365 sysctl_createv(clog, 0, NULL, NULL, 366 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 367 CTLTYPE_INT, "rtc_offset", 368 SYSCTL_DESCR("Offset of real time clock from UTC in " 369 "minutes"), 370 sysctl_kern_rtc_offset, 0, &rtc_offset, 0, 371 CTL_KERN, KERN_RTC_OFFSET, CTL_EOL); 372 sysctl_createv(clog, 0, NULL, NULL, 373 CTLFLAG_PERMANENT, 374 CTLTYPE_STRING, "root_device", 375 SYSCTL_DESCR("Name of the root device"), 376 sysctl_root_device, 0, NULL, 0, 377 CTL_KERN, KERN_ROOT_DEVICE, CTL_EOL); 378 sysctl_createv(clog, 0, NULL, NULL, 379 CTLFLAG_PERMANENT, 380 CTLTYPE_INT, "msgbufsize", 381 SYSCTL_DESCR("Size of the kernel message buffer"), 382 sysctl_msgbuf, 0, NULL, 0, 383 CTL_KERN, KERN_MSGBUFSIZE, CTL_EOL); 384 sysctl_createv(clog, 0, NULL, NULL, 385 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 386 CTLTYPE_INT, "fsync", 387 SYSCTL_DESCR("Whether the POSIX 1003.1b File " 388 "Synchronization Option is available on " 389 "this system"), 390 NULL, 1, NULL, 0, 391 CTL_KERN, KERN_FSYNC, CTL_EOL); 392 sysctl_createv(clog, 0, NULL, NULL, 393 CTLFLAG_PERMANENT, 394 CTLTYPE_NODE, "ipc", 395 SYSCTL_DESCR("SysV IPC options"), 396 NULL, 0, NULL, 0, 397 CTL_KERN, KERN_SYSVIPC, CTL_EOL); 398 sysctl_createv(clog, 0, NULL, NULL, 399 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 400 CTLTYPE_INT, "sysvmsg", 401 SYSCTL_DESCR("System V style message support available"), 402 NULL, 403 #ifdef SYSVMSG 404 1, 405 #else /* SYSVMSG */ 406 0, 407 #endif /* SYSVMSG */ 408 NULL, 0, CTL_KERN, KERN_SYSVIPC, KERN_SYSVIPC_MSG, CTL_EOL); 409 sysctl_createv(clog, 0, NULL, NULL, 410 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 411 CTLTYPE_INT, "sysvsem", 412 SYSCTL_DESCR("System V style semaphore support " 413 "available"), NULL, 414 #ifdef SYSVSEM 415 1, 416 #else /* SYSVSEM */ 417 0, 418 #endif /* SYSVSEM */ 419 NULL, 0, CTL_KERN, KERN_SYSVIPC, KERN_SYSVIPC_SEM, CTL_EOL); 420 sysctl_createv(clog, 0, NULL, NULL, 421 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 422 CTLTYPE_INT, "sysvshm", 423 SYSCTL_DESCR("System V style shared memory support " 424 "available"), NULL, 425 #ifdef SYSVSHM 426 1, 427 #else /* SYSVSHM */ 428 0, 429 #endif /* SYSVSHM */ 430 NULL, 0, CTL_KERN, KERN_SYSVIPC, KERN_SYSVIPC_SHM, CTL_EOL); 431 sysctl_createv(clog, 0, NULL, NULL, 432 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 433 CTLTYPE_INT, "synchronized_io", 434 SYSCTL_DESCR("Whether the POSIX 1003.1b Synchronized " 435 "I/O Option is available on this system"), 436 NULL, 1, NULL, 0, 437 CTL_KERN, KERN_SYNCHRONIZED_IO, CTL_EOL); 438 sysctl_createv(clog, 0, NULL, NULL, 439 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 440 CTLTYPE_INT, "iov_max", 441 SYSCTL_DESCR("Maximum number of iovec structures per " 442 "process"), 443 NULL, IOV_MAX, NULL, 0, 444 CTL_KERN, KERN_IOV_MAX, CTL_EOL); 445 sysctl_createv(clog, 0, NULL, NULL, 446 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 447 CTLTYPE_INT, "mapped_files", 448 SYSCTL_DESCR("Whether the POSIX 1003.1b Memory Mapped " 449 "Files Option is available on this system"), 450 NULL, 1, NULL, 0, 451 CTL_KERN, KERN_MAPPED_FILES, CTL_EOL); 452 sysctl_createv(clog, 0, NULL, NULL, 453 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 454 CTLTYPE_INT, "memlock", 455 SYSCTL_DESCR("Whether the POSIX 1003.1b Process Memory " 456 "Locking Option is available on this " 457 "system"), 458 NULL, 1, NULL, 0, 459 CTL_KERN, KERN_MEMLOCK, CTL_EOL); 460 sysctl_createv(clog, 0, NULL, NULL, 461 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 462 CTLTYPE_INT, "memlock_range", 463 SYSCTL_DESCR("Whether the POSIX 1003.1b Range Memory " 464 "Locking Option is available on this " 465 "system"), 466 NULL, 1, NULL, 0, 467 CTL_KERN, KERN_MEMLOCK_RANGE, CTL_EOL); 468 sysctl_createv(clog, 0, NULL, NULL, 469 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 470 CTLTYPE_INT, "memory_protection", 471 SYSCTL_DESCR("Whether the POSIX 1003.1b Memory " 472 "Protection Option is available on this " 473 "system"), 474 NULL, 1, NULL, 0, 475 CTL_KERN, KERN_MEMORY_PROTECTION, CTL_EOL); 476 sysctl_createv(clog, 0, NULL, NULL, 477 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 478 CTLTYPE_INT, "login_name_max", 479 SYSCTL_DESCR("Maximum login name length"), 480 NULL, LOGIN_NAME_MAX, NULL, 0, 481 CTL_KERN, KERN_LOGIN_NAME_MAX, CTL_EOL); 482 sysctl_createv(clog, 0, NULL, NULL, 483 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 484 CTLTYPE_STRING, "defcorename", 485 SYSCTL_DESCR("Default core file name"), 486 sysctl_kern_defcorename, 0, defcorename, MAXPATHLEN, 487 CTL_KERN, KERN_DEFCORENAME, CTL_EOL); 488 sysctl_createv(clog, 0, NULL, NULL, 489 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 490 CTLTYPE_INT, "logsigexit", 491 SYSCTL_DESCR("Log process exit when caused by signals"), 492 NULL, 0, &kern_logsigexit, 0, 493 CTL_KERN, KERN_LOGSIGEXIT, CTL_EOL); 494 sysctl_createv(clog, 0, NULL, NULL, 495 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 496 CTLTYPE_INT, "fscale", 497 SYSCTL_DESCR("Kernel fixed-point scale factor"), 498 NULL, FSCALE, NULL, 0, 499 CTL_KERN, KERN_FSCALE, CTL_EOL); 500 sysctl_createv(clog, 0, NULL, NULL, 501 CTLFLAG_PERMANENT, 502 CTLTYPE_INT, "ccpu", 503 SYSCTL_DESCR("Scheduler exponential decay value"), 504 NULL, 0, &ccpu, 0, 505 CTL_KERN, KERN_CCPU, CTL_EOL); 506 sysctl_createv(clog, 0, NULL, NULL, 507 CTLFLAG_PERMANENT, 508 CTLTYPE_STRUCT, "cp_time", 509 SYSCTL_DESCR("Clock ticks spent in different CPU states"), 510 sysctl_kern_cptime, 0, NULL, 0, 511 CTL_KERN, KERN_CP_TIME, CTL_EOL); 512 sysctl_createv(clog, 0, NULL, NULL, 513 CTLFLAG_PERMANENT, 514 CTLTYPE_INT, "msgbuf", 515 SYSCTL_DESCR("Kernel message buffer"), 516 sysctl_msgbuf, 0, NULL, 0, 517 CTL_KERN, KERN_MSGBUF, CTL_EOL); 518 sysctl_createv(clog, 0, NULL, NULL, 519 CTLFLAG_PERMANENT, 520 CTLTYPE_STRUCT, "consdev", 521 SYSCTL_DESCR("Console device"), 522 sysctl_consdev, 0, NULL, sizeof(dev_t), 523 CTL_KERN, KERN_CONSDEV, CTL_EOL); 524 #if NPTY > 0 525 sysctl_createv(clog, 0, NULL, NULL, 526 CTLFLAG_PERMANENT, 527 CTLTYPE_INT, "maxptys", 528 SYSCTL_DESCR("Maximum number of pseudo-ttys"), 529 sysctl_kern_maxptys, 0, NULL, 0, 530 CTL_KERN, KERN_MAXPTYS, CTL_EOL); 531 #endif /* NPTY > 0 */ 532 sysctl_createv(clog, 0, NULL, NULL, 533 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 534 CTLTYPE_INT, "maxphys", 535 SYSCTL_DESCR("Maximum raw I/O transfer size"), 536 NULL, MAXPHYS, NULL, 0, 537 CTL_KERN, KERN_MAXPHYS, CTL_EOL); 538 sysctl_createv(clog, 0, NULL, NULL, 539 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 540 CTLTYPE_INT, "sbmax", 541 SYSCTL_DESCR("Maximum socket buffer size"), 542 sysctl_kern_sbmax, 0, NULL, 0, 543 CTL_KERN, KERN_SBMAX, CTL_EOL); 544 sysctl_createv(clog, 0, NULL, NULL, 545 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 546 CTLTYPE_INT, "monotonic_clock", 547 SYSCTL_DESCR("Implementation version of the POSIX " 548 "1003.1b Monotonic Clock Option"), 549 /* XXX _POSIX_VERSION */ 550 NULL, _POSIX_MONOTONIC_CLOCK, NULL, 0, 551 CTL_KERN, KERN_MONOTONIC_CLOCK, CTL_EOL); 552 sysctl_createv(clog, 0, NULL, NULL, 553 CTLFLAG_PERMANENT, 554 CTLTYPE_INT, "urandom", 555 SYSCTL_DESCR("Random integer value"), 556 sysctl_kern_urnd, 0, NULL, 0, 557 CTL_KERN, KERN_URND, CTL_EOL); 558 sysctl_createv(clog, 0, NULL, NULL, 559 CTLFLAG_PERMANENT, 560 CTLTYPE_INT, "arandom", 561 SYSCTL_DESCR("n bytes of random data"), 562 sysctl_kern_arnd, 0, NULL, 0, 563 CTL_KERN, KERN_ARND, CTL_EOL); 564 sysctl_createv(clog, 0, NULL, NULL, 565 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 566 CTLTYPE_INT, "labelsector", 567 SYSCTL_DESCR("Sector number containing the disklabel"), 568 NULL, LABELSECTOR, NULL, 0, 569 CTL_KERN, KERN_LABELSECTOR, CTL_EOL); 570 sysctl_createv(clog, 0, NULL, NULL, 571 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 572 CTLTYPE_INT, "labeloffset", 573 SYSCTL_DESCR("Offset of the disklabel within the " 574 "sector"), 575 NULL, LABELOFFSET, NULL, 0, 576 CTL_KERN, KERN_LABELOFFSET, CTL_EOL); 577 sysctl_createv(clog, 0, NULL, NULL, 578 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 579 CTLTYPE_INT, "labelusesmbr", 580 SYSCTL_DESCR("disklabel is inside MBR partition"), 581 NULL, LABELUSESMBR, NULL, 0, 582 CTL_KERN, CTL_CREATE, CTL_EOL); 583 sysctl_createv(clog, 0, NULL, NULL, 584 CTLFLAG_PERMANENT, 585 CTLTYPE_NODE, "lwp", 586 SYSCTL_DESCR("System-wide LWP information"), 587 sysctl_kern_lwp, 0, NULL, 0, 588 CTL_KERN, KERN_LWP, CTL_EOL); 589 sysctl_createv(clog, 0, NULL, NULL, 590 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 591 CTLTYPE_INT, "forkfsleep", 592 SYSCTL_DESCR("Milliseconds to sleep on fork failure due " 593 "to process limits"), 594 sysctl_kern_forkfsleep, 0, NULL, 0, 595 CTL_KERN, KERN_FORKFSLEEP, CTL_EOL); 596 sysctl_createv(clog, 0, NULL, NULL, 597 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 598 CTLTYPE_INT, "posix_threads", 599 SYSCTL_DESCR("Version of IEEE Std 1003.1 and its " 600 "Threads option to which the system " 601 "attempts to conform"), 602 /* XXX _POSIX_VERSION */ 603 NULL, _POSIX_THREADS, NULL, 0, 604 CTL_KERN, KERN_POSIX_THREADS, CTL_EOL); 605 sysctl_createv(clog, 0, NULL, NULL, 606 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 607 CTLTYPE_INT, "posix_semaphores", 608 SYSCTL_DESCR("Version of IEEE Std 1003.1 and its " 609 "Semaphores option to which the system " 610 "attempts to conform"), NULL, 611 200112, NULL, 0, 612 CTL_KERN, KERN_POSIX_SEMAPHORES, CTL_EOL); 613 sysctl_createv(clog, 0, NULL, NULL, 614 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 615 CTLTYPE_INT, "posix_barriers", 616 SYSCTL_DESCR("Version of IEEE Std 1003.1 and its " 617 "Barriers option to which the system " 618 "attempts to conform"), 619 /* XXX _POSIX_VERSION */ 620 NULL, _POSIX_BARRIERS, NULL, 0, 621 CTL_KERN, KERN_POSIX_BARRIERS, CTL_EOL); 622 sysctl_createv(clog, 0, NULL, NULL, 623 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 624 CTLTYPE_INT, "posix_timers", 625 SYSCTL_DESCR("Version of IEEE Std 1003.1 and its " 626 "Timers option to which the system " 627 "attempts to conform"), 628 /* XXX _POSIX_VERSION */ 629 NULL, _POSIX_TIMERS, NULL, 0, 630 CTL_KERN, KERN_POSIX_TIMERS, CTL_EOL); 631 sysctl_createv(clog, 0, NULL, NULL, 632 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 633 CTLTYPE_INT, "posix_spin_locks", 634 SYSCTL_DESCR("Version of IEEE Std 1003.1 and its Spin " 635 "Locks option to which the system attempts " 636 "to conform"), 637 /* XXX _POSIX_VERSION */ 638 NULL, _POSIX_SPIN_LOCKS, NULL, 0, 639 CTL_KERN, KERN_POSIX_SPIN_LOCKS, CTL_EOL); 640 sysctl_createv(clog, 0, NULL, NULL, 641 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 642 CTLTYPE_INT, "posix_reader_writer_locks", 643 SYSCTL_DESCR("Version of IEEE Std 1003.1 and its " 644 "Read-Write Locks option to which the " 645 "system attempts to conform"), 646 /* XXX _POSIX_VERSION */ 647 NULL, _POSIX_READER_WRITER_LOCKS, NULL, 0, 648 CTL_KERN, KERN_POSIX_READER_WRITER_LOCKS, CTL_EOL); 649 sysctl_createv(clog, 0, NULL, NULL, 650 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 651 CTLTYPE_INT, "dump_on_panic", 652 SYSCTL_DESCR("Perform a crash dump on system panic"), 653 NULL, 0, &dumponpanic, 0, 654 CTL_KERN, KERN_DUMP_ON_PANIC, CTL_EOL); 655 #ifdef DIAGNOSTIC 656 sysctl_createv(clog, 0, NULL, NULL, 657 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 658 CTLTYPE_INT, "panic_now", 659 SYSCTL_DESCR("Trigger a panic"), 660 sysctl_kern_trigger_panic, 0, NULL, 0, 661 CTL_KERN, CTL_CREATE, CTL_EOL); 662 #endif 663 sysctl_createv(clog, 0, NULL, NULL, 664 CTLFLAG_PERMANENT, 665 CTLTYPE_INT, "root_partition", 666 SYSCTL_DESCR("Root partition on the root device"), 667 sysctl_kern_root_partition, 0, NULL, 0, 668 CTL_KERN, KERN_ROOT_PARTITION, CTL_EOL); 669 sysctl_createv(clog, 0, NULL, NULL, 670 CTLFLAG_PERMANENT, 671 CTLTYPE_STRUCT, "drivers", 672 SYSCTL_DESCR("List of all drivers with block and " 673 "character device numbers"), 674 sysctl_kern_drivers, 0, NULL, 0, 675 CTL_KERN, KERN_DRIVERS, CTL_EOL); 676 sysctl_createv(clog, 0, NULL, NULL, 677 CTLFLAG_PERMANENT, 678 CTLTYPE_STRUCT, "cp_id", 679 SYSCTL_DESCR("Mapping of CPU number to CPU id"), 680 sysctl_kern_cpid, 0, NULL, 0, 681 CTL_KERN, KERN_CP_ID, CTL_EOL); 682 sysctl_createv(clog, 0, NULL, &rnode, 683 CTLFLAG_PERMANENT, 684 CTLTYPE_NODE, "coredump", 685 SYSCTL_DESCR("Coredump settings."), 686 NULL, 0, NULL, 0, 687 CTL_KERN, CTL_CREATE, CTL_EOL); 688 sysctl_createv(clog, 0, &rnode, &rnode, 689 CTLFLAG_PERMANENT, 690 CTLTYPE_NODE, "setid", 691 SYSCTL_DESCR("Set-id processes' coredump settings."), 692 NULL, 0, NULL, 0, 693 CTL_CREATE, CTL_EOL); 694 sysctl_createv(clog, 0, &rnode, NULL, 695 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 696 CTLTYPE_INT, "dump", 697 SYSCTL_DESCR("Allow set-id processes to dump core."), 698 sysctl_security_setidcore, 0, &security_setidcore_dump, 699 sizeof(security_setidcore_dump), 700 CTL_CREATE, CTL_EOL); 701 sysctl_createv(clog, 0, &rnode, NULL, 702 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 703 CTLTYPE_STRING, "path", 704 SYSCTL_DESCR("Path pattern for set-id coredumps."), 705 sysctl_security_setidcorename, 0, 706 &security_setidcore_path, 707 sizeof(security_setidcore_path), 708 CTL_CREATE, CTL_EOL); 709 sysctl_createv(clog, 0, &rnode, NULL, 710 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 711 CTLTYPE_INT, "owner", 712 SYSCTL_DESCR("Owner id for set-id processes' cores."), 713 sysctl_security_setidcore, 0, &security_setidcore_owner, 714 0, 715 CTL_CREATE, CTL_EOL); 716 sysctl_createv(clog, 0, &rnode, NULL, 717 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 718 CTLTYPE_INT, "group", 719 SYSCTL_DESCR("Group id for set-id processes' cores."), 720 sysctl_security_setidcore, 0, &security_setidcore_group, 721 0, 722 CTL_CREATE, CTL_EOL); 723 sysctl_createv(clog, 0, &rnode, NULL, 724 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 725 CTLTYPE_INT, "mode", 726 SYSCTL_DESCR("Mode for set-id processes' cores."), 727 sysctl_security_setidcore, 0, &security_setidcore_mode, 728 0, 729 CTL_CREATE, CTL_EOL); 730 sysctl_createv(clog, 0, NULL, NULL, 731 CTLFLAG_IMMEDIATE|CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 732 CTLTYPE_INT, "no_sa_support", 733 SYSCTL_DESCR("0 if the kernel supports SA, otherwise " 734 "it doesn't"), 735 NULL, 1, NULL, 0, 736 CTL_KERN, CTL_CREATE, CTL_EOL); 737 /* kern.posix. */ 738 sysctl_createv(clog, 0, NULL, &rnode, 739 CTLFLAG_PERMANENT, 740 CTLTYPE_NODE, "posix", 741 SYSCTL_DESCR("POSIX options"), 742 NULL, 0, NULL, 0, 743 CTL_KERN, CTL_CREATE, CTL_EOL); 744 sysctl_createv(clog, 0, &rnode, NULL, 745 CTLFLAG_PERMANENT | CTLFLAG_READWRITE, 746 CTLTYPE_INT, "semmax", 747 SYSCTL_DESCR("Maximal number of semaphores"), 748 NULL, 0, &ksem_max, 0, 749 CTL_CREATE, CTL_EOL); 750 } 751 752 SYSCTL_SETUP(sysctl_hw_setup, "sysctl hw subtree setup") 753 { 754 u_int u; 755 u_quad_t q; 756 757 sysctl_createv(clog, 0, NULL, NULL, 758 CTLFLAG_PERMANENT, 759 CTLTYPE_NODE, "hw", NULL, 760 NULL, 0, NULL, 0, 761 CTL_HW, CTL_EOL); 762 763 sysctl_createv(clog, 0, NULL, NULL, 764 CTLFLAG_PERMANENT, 765 CTLTYPE_STRING, "machine", 766 SYSCTL_DESCR("Machine class"), 767 NULL, 0, machine, 0, 768 CTL_HW, HW_MACHINE, CTL_EOL); 769 sysctl_createv(clog, 0, NULL, NULL, 770 CTLFLAG_PERMANENT, 771 CTLTYPE_STRING, "model", 772 SYSCTL_DESCR("Machine model"), 773 NULL, 0, cpu_model, 0, 774 CTL_HW, HW_MODEL, CTL_EOL); 775 sysctl_createv(clog, 0, NULL, NULL, 776 CTLFLAG_PERMANENT, 777 CTLTYPE_INT, "ncpu", 778 SYSCTL_DESCR("Number of CPUs configured"), 779 NULL, 0, &ncpu, 0, 780 CTL_HW, HW_NCPU, CTL_EOL); 781 sysctl_createv(clog, 0, NULL, NULL, 782 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 783 CTLTYPE_INT, "byteorder", 784 SYSCTL_DESCR("System byte order"), 785 NULL, BYTE_ORDER, NULL, 0, 786 CTL_HW, HW_BYTEORDER, CTL_EOL); 787 u = ((u_int)physmem > (UINT_MAX / PAGE_SIZE)) ? 788 UINT_MAX : physmem * PAGE_SIZE; 789 sysctl_createv(clog, 0, NULL, NULL, 790 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 791 CTLTYPE_INT, "physmem", 792 SYSCTL_DESCR("Bytes of physical memory"), 793 NULL, u, NULL, 0, 794 CTL_HW, HW_PHYSMEM, CTL_EOL); 795 sysctl_createv(clog, 0, NULL, NULL, 796 CTLFLAG_PERMANENT, 797 CTLTYPE_INT, "usermem", 798 SYSCTL_DESCR("Bytes of non-kernel memory"), 799 sysctl_hw_usermem, 0, NULL, 0, 800 CTL_HW, HW_USERMEM, CTL_EOL); 801 sysctl_createv(clog, 0, NULL, NULL, 802 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 803 CTLTYPE_INT, "pagesize", 804 SYSCTL_DESCR("Software page size"), 805 NULL, PAGE_SIZE, NULL, 0, 806 CTL_HW, HW_PAGESIZE, CTL_EOL); 807 sysctl_createv(clog, 0, NULL, NULL, 808 CTLFLAG_PERMANENT, 809 CTLTYPE_STRING, "machine_arch", 810 SYSCTL_DESCR("Machine CPU class"), 811 NULL, 0, machine_arch, 0, 812 CTL_HW, HW_MACHINE_ARCH, CTL_EOL); 813 sysctl_createv(clog, 0, NULL, NULL, 814 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 815 CTLTYPE_INT, "alignbytes", 816 SYSCTL_DESCR("Alignment constraint for all possible " 817 "data types"), 818 NULL, ALIGNBYTES, NULL, 0, 819 CTL_HW, HW_ALIGNBYTES, CTL_EOL); 820 sysctl_createv(clog, 0, NULL, NULL, 821 CTLFLAG_PERMANENT|CTLFLAG_READWRITE|CTLFLAG_HEX, 822 CTLTYPE_STRING, "cnmagic", 823 SYSCTL_DESCR("Console magic key sequence"), 824 sysctl_hw_cnmagic, 0, NULL, CNS_LEN, 825 CTL_HW, HW_CNMAGIC, CTL_EOL); 826 q = (u_quad_t)physmem * PAGE_SIZE; 827 sysctl_createv(clog, 0, NULL, NULL, 828 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 829 CTLTYPE_QUAD, "physmem64", 830 SYSCTL_DESCR("Bytes of physical memory"), 831 NULL, q, NULL, 0, 832 CTL_HW, HW_PHYSMEM64, CTL_EOL); 833 sysctl_createv(clog, 0, NULL, NULL, 834 CTLFLAG_PERMANENT, 835 CTLTYPE_QUAD, "usermem64", 836 SYSCTL_DESCR("Bytes of non-kernel memory"), 837 sysctl_hw_usermem, 0, NULL, 0, 838 CTL_HW, HW_USERMEM64, CTL_EOL); 839 sysctl_createv(clog, 0, NULL, NULL, 840 CTLFLAG_PERMANENT, 841 CTLTYPE_INT, "ncpuonline", 842 SYSCTL_DESCR("Number of CPUs online"), 843 NULL, 0, &ncpuonline, 0, 844 CTL_HW, HW_NCPUONLINE, CTL_EOL); 845 } 846 847 #ifdef DEBUG 848 /* 849 * Debugging related system variables. 850 */ 851 struct ctldebug /* debug0, */ /* debug1, */ debug2, debug3, debug4; 852 struct ctldebug debug5, debug6, debug7, debug8, debug9; 853 struct ctldebug debug10, debug11, debug12, debug13, debug14; 854 struct ctldebug debug15, debug16, debug17, debug18, debug19; 855 static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = { 856 &debug0, &debug1, &debug2, &debug3, &debug4, 857 &debug5, &debug6, &debug7, &debug8, &debug9, 858 &debug10, &debug11, &debug12, &debug13, &debug14, 859 &debug15, &debug16, &debug17, &debug18, &debug19, 860 }; 861 862 /* 863 * this setup routine is a replacement for debug_sysctl() 864 * 865 * note that it creates several nodes per defined debug variable 866 */ 867 SYSCTL_SETUP(sysctl_debug_setup, "sysctl debug subtree setup") 868 { 869 struct ctldebug *cdp; 870 char nodename[20]; 871 int i; 872 873 /* 874 * two ways here: 875 * 876 * the "old" way (debug.name -> value) which was emulated by 877 * the sysctl(8) binary 878 * 879 * the new way, which the sysctl(8) binary was actually using 880 881 node debug 882 node debug.0 883 string debug.0.name 884 int debug.0.value 885 int debug.name 886 887 */ 888 889 sysctl_createv(clog, 0, NULL, NULL, 890 CTLFLAG_PERMANENT, 891 CTLTYPE_NODE, "debug", NULL, 892 NULL, 0, NULL, 0, 893 CTL_DEBUG, CTL_EOL); 894 895 for (i = 0; i < CTL_DEBUG_MAXID; i++) { 896 cdp = debugvars[i]; 897 if (cdp->debugname == NULL || cdp->debugvar == NULL) 898 continue; 899 900 snprintf(nodename, sizeof(nodename), "debug%d", i); 901 sysctl_createv(clog, 0, NULL, NULL, 902 CTLFLAG_PERMANENT|CTLFLAG_HIDDEN, 903 CTLTYPE_NODE, nodename, NULL, 904 NULL, 0, NULL, 0, 905 CTL_DEBUG, i, CTL_EOL); 906 sysctl_createv(clog, 0, NULL, NULL, 907 CTLFLAG_PERMANENT|CTLFLAG_HIDDEN, 908 CTLTYPE_STRING, "name", NULL, 909 /*XXXUNCONST*/ 910 NULL, 0, __UNCONST(cdp->debugname), 0, 911 CTL_DEBUG, i, CTL_DEBUG_NAME, CTL_EOL); 912 sysctl_createv(clog, 0, NULL, NULL, 913 CTLFLAG_PERMANENT|CTLFLAG_HIDDEN, 914 CTLTYPE_INT, "value", NULL, 915 NULL, 0, cdp->debugvar, 0, 916 CTL_DEBUG, i, CTL_DEBUG_VALUE, CTL_EOL); 917 sysctl_createv(clog, 0, NULL, NULL, 918 CTLFLAG_PERMANENT, 919 CTLTYPE_INT, cdp->debugname, NULL, 920 NULL, 0, cdp->debugvar, 0, 921 CTL_DEBUG, CTL_CREATE, CTL_EOL); 922 } 923 } 924 #endif /* DEBUG */ 925 926 /* 927 * ******************************************************************** 928 * section 2: private node-specific helper routines. 929 * ******************************************************************** 930 */ 931 932 #ifdef DIAGNOSTIC 933 static int 934 sysctl_kern_trigger_panic(SYSCTLFN_ARGS) 935 { 936 int newtrig, error; 937 struct sysctlnode node; 938 939 newtrig = 0; 940 node = *rnode; 941 node.sysctl_data = &newtrig; 942 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 943 if (error || newp == NULL) 944 return (error); 945 946 if (newtrig != 0) 947 panic("Panic triggered"); 948 949 return (error); 950 } 951 #endif 952 953 /* 954 * sysctl helper routine for kern.maxvnodes. Drain vnodes if 955 * new value is lower than desiredvnodes and then calls reinit 956 * routines that needs to adjust to the new value. 957 */ 958 static int 959 sysctl_kern_maxvnodes(SYSCTLFN_ARGS) 960 { 961 int error, new_vnodes, old_vnodes, new_max; 962 struct sysctlnode node; 963 964 new_vnodes = desiredvnodes; 965 node = *rnode; 966 node.sysctl_data = &new_vnodes; 967 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 968 if (error || newp == NULL) 969 return (error); 970 971 /* Limits: 75% of KVA and physical memory. */ 972 new_max = calc_cache_size(kernel_map, 75, 75) / VNODE_COST; 973 if (new_vnodes > new_max) 974 new_vnodes = new_max; 975 976 old_vnodes = desiredvnodes; 977 desiredvnodes = new_vnodes; 978 if (new_vnodes < old_vnodes) { 979 error = vfs_drainvnodes(new_vnodes); 980 if (error) { 981 desiredvnodes = old_vnodes; 982 return (error); 983 } 984 } 985 vfs_reinit(); 986 nchreinit(); 987 988 return (0); 989 } 990 991 /* 992 * sysctl helper routine for rtc_offset - set time after changes 993 */ 994 static int 995 sysctl_kern_rtc_offset(SYSCTLFN_ARGS) 996 { 997 struct timespec ts, delta; 998 int error, new_rtc_offset; 999 struct sysctlnode node; 1000 1001 new_rtc_offset = rtc_offset; 1002 node = *rnode; 1003 node.sysctl_data = &new_rtc_offset; 1004 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1005 if (error || newp == NULL) 1006 return (error); 1007 1008 if (kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_TIME, 1009 KAUTH_REQ_SYSTEM_TIME_RTCOFFSET, 1010 KAUTH_ARG(new_rtc_offset), NULL, NULL)) 1011 return (EPERM); 1012 if (rtc_offset == new_rtc_offset) 1013 return (0); 1014 1015 /* if we change the offset, adjust the time */ 1016 nanotime(&ts); 1017 delta.tv_sec = 60 * (new_rtc_offset - rtc_offset); 1018 delta.tv_nsec = 0; 1019 timespecadd(&ts, &delta, &ts); 1020 rtc_offset = new_rtc_offset; 1021 return (settime(l->l_proc, &ts)); 1022 } 1023 1024 /* 1025 * sysctl helper routine for kern.maxproc. Ensures that the new 1026 * values are not too low or too high. 1027 */ 1028 static int 1029 sysctl_kern_maxproc(SYSCTLFN_ARGS) 1030 { 1031 int error, nmaxproc; 1032 struct sysctlnode node; 1033 1034 nmaxproc = maxproc; 1035 node = *rnode; 1036 node.sysctl_data = &nmaxproc; 1037 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1038 if (error || newp == NULL) 1039 return (error); 1040 1041 if (nmaxproc < 0 || nmaxproc >= PID_MAX) 1042 return (EINVAL); 1043 #ifdef __HAVE_CPU_MAXPROC 1044 if (nmaxproc > cpu_maxproc()) 1045 return (EINVAL); 1046 #endif 1047 maxproc = nmaxproc; 1048 1049 return (0); 1050 } 1051 1052 /* 1053 * sysctl helper function for kern.hostid. The hostid is a long, but 1054 * we export it as an int, so we need to give it a little help. 1055 */ 1056 static int 1057 sysctl_kern_hostid(SYSCTLFN_ARGS) 1058 { 1059 int error, inthostid; 1060 struct sysctlnode node; 1061 1062 inthostid = hostid; /* XXX assumes sizeof int <= sizeof long */ 1063 node = *rnode; 1064 node.sysctl_data = &inthostid; 1065 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1066 if (error || newp == NULL) 1067 return (error); 1068 1069 hostid = (unsigned)inthostid; 1070 1071 return (0); 1072 } 1073 1074 /* 1075 * sysctl helper function for kern.hostname and kern.domainnname. 1076 * resets the relevant recorded length when the underlying name is 1077 * changed. 1078 */ 1079 static int 1080 sysctl_setlen(SYSCTLFN_ARGS) 1081 { 1082 int error; 1083 1084 error = sysctl_lookup(SYSCTLFN_CALL(rnode)); 1085 if (error || newp == NULL) 1086 return (error); 1087 1088 switch (rnode->sysctl_num) { 1089 case KERN_HOSTNAME: 1090 hostnamelen = strlen((const char*)rnode->sysctl_data); 1091 break; 1092 case KERN_DOMAINNAME: 1093 domainnamelen = strlen((const char*)rnode->sysctl_data); 1094 break; 1095 } 1096 1097 return (0); 1098 } 1099 1100 /* 1101 * sysctl helper routine for kern.clockrate. Assembles a struct on 1102 * the fly to be returned to the caller. 1103 */ 1104 static int 1105 sysctl_kern_clockrate(SYSCTLFN_ARGS) 1106 { 1107 struct clockinfo clkinfo; 1108 struct sysctlnode node; 1109 1110 clkinfo.tick = tick; 1111 clkinfo.tickadj = tickadj; 1112 clkinfo.hz = hz; 1113 clkinfo.profhz = profhz; 1114 clkinfo.stathz = stathz ? stathz : hz; 1115 1116 node = *rnode; 1117 node.sysctl_data = &clkinfo; 1118 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 1119 } 1120 1121 /* 1122 * sysctl helper routine for kern.msgbufsize and kern.msgbuf. For the 1123 * former it merely checks the message buffer is set up. For the latter, 1124 * it also copies out the data if necessary. 1125 */ 1126 static int 1127 sysctl_msgbuf(SYSCTLFN_ARGS) 1128 { 1129 char *where = oldp; 1130 size_t len, maxlen; 1131 long beg, end; 1132 extern kmutex_t log_lock; 1133 int error; 1134 1135 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 1136 msgbufenabled = 0; 1137 return (ENXIO); 1138 } 1139 1140 switch (rnode->sysctl_num) { 1141 case KERN_MSGBUFSIZE: { 1142 struct sysctlnode node = *rnode; 1143 int msg_bufs = (int)msgbufp->msg_bufs; 1144 node.sysctl_data = &msg_bufs; 1145 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 1146 } 1147 case KERN_MSGBUF: 1148 break; 1149 default: 1150 return (EOPNOTSUPP); 1151 } 1152 1153 if (newp != NULL) 1154 return (EPERM); 1155 1156 if (oldp == NULL) { 1157 /* always return full buffer size */ 1158 *oldlenp = msgbufp->msg_bufs; 1159 return (0); 1160 } 1161 1162 sysctl_unlock(); 1163 1164 /* 1165 * First, copy from the write pointer to the end of 1166 * message buffer. 1167 */ 1168 error = 0; 1169 mutex_spin_enter(&log_lock); 1170 maxlen = MIN(msgbufp->msg_bufs, *oldlenp); 1171 beg = msgbufp->msg_bufx; 1172 end = msgbufp->msg_bufs; 1173 mutex_spin_exit(&log_lock); 1174 1175 while (maxlen > 0) { 1176 len = MIN(end - beg, maxlen); 1177 if (len == 0) 1178 break; 1179 /* XXX unlocked, but hardly matters. */ 1180 error = dcopyout(l, &msgbufp->msg_bufc[beg], where, len); 1181 if (error) 1182 break; 1183 where += len; 1184 maxlen -= len; 1185 1186 /* 1187 * ... then, copy from the beginning of message buffer to 1188 * the write pointer. 1189 */ 1190 beg = 0; 1191 end = msgbufp->msg_bufx; 1192 } 1193 1194 sysctl_relock(); 1195 return (error); 1196 } 1197 1198 /* 1199 * sysctl helper routine for kern.defcorename. In the case of a new 1200 * string being assigned, check that it's not a zero-length string. 1201 * (XXX the check in -current doesn't work, but do we really care?) 1202 */ 1203 static int 1204 sysctl_kern_defcorename(SYSCTLFN_ARGS) 1205 { 1206 int error; 1207 char *newcorename; 1208 struct sysctlnode node; 1209 1210 newcorename = PNBUF_GET(); 1211 node = *rnode; 1212 node.sysctl_data = &newcorename[0]; 1213 memcpy(node.sysctl_data, rnode->sysctl_data, MAXPATHLEN); 1214 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1215 if (error || newp == NULL) { 1216 goto done; 1217 } 1218 1219 /* 1220 * when sysctl_lookup() deals with a string, it's guaranteed 1221 * to come back nul terminated. So there. :) 1222 */ 1223 if (strlen(newcorename) == 0) { 1224 error = EINVAL; 1225 } else { 1226 memcpy(rnode->sysctl_data, node.sysctl_data, MAXPATHLEN); 1227 error = 0; 1228 } 1229 done: 1230 PNBUF_PUT(newcorename); 1231 return error; 1232 } 1233 1234 /* 1235 * sysctl helper routine for kern.cp_time node. Adds up cpu time 1236 * across all cpus. 1237 */ 1238 static int 1239 sysctl_kern_cptime(SYSCTLFN_ARGS) 1240 { 1241 struct sysctlnode node = *rnode; 1242 uint64_t *cp_time = NULL; 1243 int error, n = ncpu, i; 1244 struct cpu_info *ci; 1245 CPU_INFO_ITERATOR cii; 1246 1247 /* 1248 * if you specifically pass a buffer that is the size of the 1249 * sum, or if you are probing for the size, you get the "sum" 1250 * of cp_time (and the size thereof) across all processors. 1251 * 1252 * alternately, you can pass an additional mib number and get 1253 * cp_time for that particular processor. 1254 */ 1255 switch (namelen) { 1256 case 0: 1257 if (*oldlenp == sizeof(uint64_t) * CPUSTATES || oldp == NULL) { 1258 node.sysctl_size = sizeof(uint64_t) * CPUSTATES; 1259 n = -1; /* SUM */ 1260 } 1261 else { 1262 node.sysctl_size = n * sizeof(uint64_t) * CPUSTATES; 1263 n = -2; /* ALL */ 1264 } 1265 break; 1266 case 1: 1267 if (name[0] < 0 || name[0] >= n) 1268 return (ENOENT); /* ENOSUCHPROCESSOR */ 1269 node.sysctl_size = sizeof(uint64_t) * CPUSTATES; 1270 n = name[0]; 1271 /* 1272 * adjust these so that sysctl_lookup() will be happy 1273 */ 1274 name++; 1275 namelen--; 1276 break; 1277 default: 1278 return (EINVAL); 1279 } 1280 1281 cp_time = kmem_alloc(node.sysctl_size, KM_SLEEP); 1282 if (cp_time == NULL) 1283 return (ENOMEM); 1284 node.sysctl_data = cp_time; 1285 memset(cp_time, 0, node.sysctl_size); 1286 1287 for (CPU_INFO_FOREACH(cii, ci)) { 1288 if (n <= 0) { 1289 for (i = 0; i < CPUSTATES; i++) { 1290 cp_time[i] += ci->ci_schedstate.spc_cp_time[i]; 1291 } 1292 } 1293 /* 1294 * if a specific processor was requested and we just 1295 * did it, we're done here 1296 */ 1297 if (n == 0) 1298 break; 1299 /* 1300 * if doing "all", skip to next cp_time set for next processor 1301 */ 1302 if (n == -2) 1303 cp_time += CPUSTATES; 1304 /* 1305 * if we're doing a specific processor, we're one 1306 * processor closer 1307 */ 1308 if (n > 0) 1309 n--; 1310 } 1311 1312 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1313 kmem_free(node.sysctl_data, node.sysctl_size); 1314 return (error); 1315 } 1316 1317 #if NPTY > 0 1318 /* 1319 * sysctl helper routine for kern.maxptys. Ensures that any new value 1320 * is acceptable to the pty subsystem. 1321 */ 1322 static int 1323 sysctl_kern_maxptys(SYSCTLFN_ARGS) 1324 { 1325 int pty_maxptys(int, int); /* defined in kern/tty_pty.c */ 1326 int error, xmax; 1327 struct sysctlnode node; 1328 1329 /* get current value of maxptys */ 1330 xmax = pty_maxptys(0, 0); 1331 1332 node = *rnode; 1333 node.sysctl_data = &xmax; 1334 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1335 if (error || newp == NULL) 1336 return (error); 1337 1338 if (xmax != pty_maxptys(xmax, 1)) 1339 return (EINVAL); 1340 1341 return (0); 1342 } 1343 #endif /* NPTY > 0 */ 1344 1345 /* 1346 * sysctl helper routine for kern.sbmax. Basically just ensures that 1347 * any new value is not too small. 1348 */ 1349 static int 1350 sysctl_kern_sbmax(SYSCTLFN_ARGS) 1351 { 1352 int error, new_sbmax; 1353 struct sysctlnode node; 1354 1355 new_sbmax = sb_max; 1356 node = *rnode; 1357 node.sysctl_data = &new_sbmax; 1358 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1359 if (error || newp == NULL) 1360 return (error); 1361 1362 KERNEL_LOCK(1, NULL); 1363 error = sb_max_set(new_sbmax); 1364 KERNEL_UNLOCK_ONE(NULL); 1365 1366 return (error); 1367 } 1368 1369 /* 1370 * sysctl helper routine for kern.urandom node. Picks a random number 1371 * for you. 1372 */ 1373 static int 1374 sysctl_kern_urnd(SYSCTLFN_ARGS) 1375 { 1376 int v, rv; 1377 1378 rv = cprng_strong(sysctl_prng, &v, sizeof(v), 0); 1379 if (rv == sizeof(v)) { 1380 struct sysctlnode node = *rnode; 1381 node.sysctl_data = &v; 1382 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 1383 } 1384 else 1385 return (EIO); /*XXX*/ 1386 } 1387 1388 /* 1389 * sysctl helper routine for kern.arandom node. Picks a random number 1390 * for you. 1391 */ 1392 static int 1393 sysctl_kern_arnd(SYSCTLFN_ARGS) 1394 { 1395 int error; 1396 void *v; 1397 struct sysctlnode node = *rnode; 1398 1399 if (*oldlenp == 0) 1400 return 0; 1401 /* 1402 * This code used to allow sucking 8192 bytes at a time out 1403 * of the kernel arc4random generator. Evidently there is some 1404 * very old OpenBSD application code that may try to do this. 1405 * 1406 * Note that this node is documented as type "INT" -- 4 or 8 1407 * bytes, not 8192. 1408 * 1409 * We continue to support this abuse of the "len" pointer here 1410 * but only 256 bytes at a time, as, anecdotally, the actual 1411 * application use here was to generate RC4 keys in userspace. 1412 * 1413 * Support for such large requests will probably be removed 1414 * entirely in the future. 1415 */ 1416 if (*oldlenp > 256) 1417 return E2BIG; 1418 1419 v = kmem_alloc(*oldlenp, KM_SLEEP); 1420 cprng_fast(v, *oldlenp); 1421 node.sysctl_data = v; 1422 node.sysctl_size = *oldlenp; 1423 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1424 kmem_free(v, *oldlenp); 1425 return error; 1426 } 1427 /* 1428 * sysctl helper routine to do kern.lwp.* work. 1429 */ 1430 static int 1431 sysctl_kern_lwp(SYSCTLFN_ARGS) 1432 { 1433 struct kinfo_lwp klwp; 1434 struct proc *p; 1435 struct lwp *l2, *l3; 1436 char *where, *dp; 1437 int pid, elem_size, elem_count; 1438 int buflen, needed, error; 1439 bool gotit; 1440 1441 if (namelen == 1 && name[0] == CTL_QUERY) 1442 return (sysctl_query(SYSCTLFN_CALL(rnode))); 1443 1444 dp = where = oldp; 1445 buflen = where != NULL ? *oldlenp : 0; 1446 error = needed = 0; 1447 1448 if (newp != NULL || namelen != 3) 1449 return (EINVAL); 1450 pid = name[0]; 1451 elem_size = name[1]; 1452 elem_count = name[2]; 1453 1454 sysctl_unlock(); 1455 if (pid == -1) { 1456 mutex_enter(proc_lock); 1457 PROCLIST_FOREACH(p, &allproc) { 1458 /* Grab a hold on the process. */ 1459 if (!rw_tryenter(&p->p_reflock, RW_READER)) { 1460 continue; 1461 } 1462 mutex_exit(proc_lock); 1463 1464 mutex_enter(p->p_lock); 1465 LIST_FOREACH(l2, &p->p_lwps, l_sibling) { 1466 if (buflen >= elem_size && elem_count > 0) { 1467 lwp_lock(l2); 1468 fill_lwp(l2, &klwp); 1469 lwp_unlock(l2); 1470 mutex_exit(p->p_lock); 1471 1472 /* 1473 * Copy out elem_size, but not 1474 * larger than the size of a 1475 * struct kinfo_proc2. 1476 */ 1477 error = dcopyout(l, &klwp, dp, 1478 min(sizeof(klwp), elem_size)); 1479 if (error) { 1480 rw_exit(&p->p_reflock); 1481 goto cleanup; 1482 } 1483 mutex_enter(p->p_lock); 1484 LIST_FOREACH(l3, &p->p_lwps, 1485 l_sibling) { 1486 if (l2 == l3) 1487 break; 1488 } 1489 if (l3 == NULL) { 1490 mutex_exit(p->p_lock); 1491 rw_exit(&p->p_reflock); 1492 error = EAGAIN; 1493 goto cleanup; 1494 } 1495 dp += elem_size; 1496 buflen -= elem_size; 1497 elem_count--; 1498 } 1499 needed += elem_size; 1500 } 1501 mutex_exit(p->p_lock); 1502 1503 /* Drop reference to process. */ 1504 mutex_enter(proc_lock); 1505 rw_exit(&p->p_reflock); 1506 } 1507 mutex_exit(proc_lock); 1508 } else { 1509 mutex_enter(proc_lock); 1510 p = proc_find(pid); 1511 if (p == NULL) { 1512 error = ESRCH; 1513 mutex_exit(proc_lock); 1514 goto cleanup; 1515 } 1516 /* Grab a hold on the process. */ 1517 gotit = rw_tryenter(&p->p_reflock, RW_READER); 1518 mutex_exit(proc_lock); 1519 if (!gotit) { 1520 error = ESRCH; 1521 goto cleanup; 1522 } 1523 1524 mutex_enter(p->p_lock); 1525 LIST_FOREACH(l2, &p->p_lwps, l_sibling) { 1526 if (buflen >= elem_size && elem_count > 0) { 1527 lwp_lock(l2); 1528 fill_lwp(l2, &klwp); 1529 lwp_unlock(l2); 1530 mutex_exit(p->p_lock); 1531 /* 1532 * Copy out elem_size, but not larger than 1533 * the size of a struct kinfo_proc2. 1534 */ 1535 error = dcopyout(l, &klwp, dp, 1536 min(sizeof(klwp), elem_size)); 1537 if (error) { 1538 rw_exit(&p->p_reflock); 1539 goto cleanup; 1540 } 1541 mutex_enter(p->p_lock); 1542 LIST_FOREACH(l3, &p->p_lwps, l_sibling) { 1543 if (l2 == l3) 1544 break; 1545 } 1546 if (l3 == NULL) { 1547 mutex_exit(p->p_lock); 1548 rw_exit(&p->p_reflock); 1549 error = EAGAIN; 1550 goto cleanup; 1551 } 1552 dp += elem_size; 1553 buflen -= elem_size; 1554 elem_count--; 1555 } 1556 needed += elem_size; 1557 } 1558 mutex_exit(p->p_lock); 1559 1560 /* Drop reference to process. */ 1561 rw_exit(&p->p_reflock); 1562 } 1563 1564 if (where != NULL) { 1565 *oldlenp = dp - where; 1566 if (needed > *oldlenp) { 1567 sysctl_relock(); 1568 return (ENOMEM); 1569 } 1570 } else { 1571 needed += KERN_LWPSLOP; 1572 *oldlenp = needed; 1573 } 1574 error = 0; 1575 cleanup: 1576 sysctl_relock(); 1577 return (error); 1578 } 1579 1580 /* 1581 * sysctl helper routine for kern.forkfsleep node. Ensures that the 1582 * given value is not too large or two small, and is at least one 1583 * timer tick if not zero. 1584 */ 1585 static int 1586 sysctl_kern_forkfsleep(SYSCTLFN_ARGS) 1587 { 1588 /* userland sees value in ms, internally is in ticks */ 1589 extern int forkfsleep; /* defined in kern/kern_fork.c */ 1590 int error, timo, lsleep; 1591 struct sysctlnode node; 1592 1593 lsleep = forkfsleep * 1000 / hz; 1594 node = *rnode; 1595 node.sysctl_data = &lsleep; 1596 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1597 if (error || newp == NULL) 1598 return (error); 1599 1600 /* refuse negative values, and overly 'long time' */ 1601 if (lsleep < 0 || lsleep > MAXSLP * 1000) 1602 return (EINVAL); 1603 1604 timo = mstohz(lsleep); 1605 1606 /* if the interval is >0 ms && <1 tick, use 1 tick */ 1607 if (lsleep != 0 && timo == 0) 1608 forkfsleep = 1; 1609 else 1610 forkfsleep = timo; 1611 1612 return (0); 1613 } 1614 1615 /* 1616 * sysctl helper routine for kern.root_partition 1617 */ 1618 static int 1619 sysctl_kern_root_partition(SYSCTLFN_ARGS) 1620 { 1621 int rootpart = DISKPART(rootdev); 1622 struct sysctlnode node = *rnode; 1623 1624 node.sysctl_data = &rootpart; 1625 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 1626 } 1627 1628 /* 1629 * sysctl helper function for kern.drivers 1630 */ 1631 static int 1632 sysctl_kern_drivers(SYSCTLFN_ARGS) 1633 { 1634 int error; 1635 size_t buflen; 1636 struct kinfo_drivers kd; 1637 char *start, *where; 1638 const char *dname; 1639 int i; 1640 extern struct devsw_conv *devsw_conv; 1641 extern int max_devsw_convs; 1642 1643 if (newp != NULL || namelen != 0) 1644 return (EINVAL); 1645 1646 start = where = oldp; 1647 buflen = *oldlenp; 1648 if (where == NULL) { 1649 *oldlenp = max_devsw_convs * sizeof kd; 1650 return 0; 1651 } 1652 1653 /* 1654 * An array of kinfo_drivers structures 1655 */ 1656 error = 0; 1657 sysctl_unlock(); 1658 mutex_enter(&device_lock); 1659 for (i = 0; i < max_devsw_convs; i++) { 1660 dname = devsw_conv[i].d_name; 1661 if (dname == NULL) 1662 continue; 1663 if (buflen < sizeof kd) { 1664 error = ENOMEM; 1665 break; 1666 } 1667 memset(&kd, 0, sizeof(kd)); 1668 kd.d_bmajor = devsw_conv[i].d_bmajor; 1669 kd.d_cmajor = devsw_conv[i].d_cmajor; 1670 strlcpy(kd.d_name, dname, sizeof kd.d_name); 1671 mutex_exit(&device_lock); 1672 error = dcopyout(l, &kd, where, sizeof kd); 1673 mutex_enter(&device_lock); 1674 if (error != 0) 1675 break; 1676 buflen -= sizeof kd; 1677 where += sizeof kd; 1678 } 1679 mutex_exit(&device_lock); 1680 sysctl_relock(); 1681 *oldlenp = where - start; 1682 return error; 1683 } 1684 1685 static int 1686 sysctl_security_setidcore(SYSCTLFN_ARGS) 1687 { 1688 int newsize, error; 1689 struct sysctlnode node; 1690 1691 node = *rnode; 1692 node.sysctl_data = &newsize; 1693 newsize = *(int *)rnode->sysctl_data; 1694 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1695 if (error || newp == NULL) 1696 return error; 1697 1698 if (kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_SETIDCORE, 1699 0, NULL, NULL, NULL)) 1700 return (EPERM); 1701 1702 *(int *)rnode->sysctl_data = newsize; 1703 1704 return 0; 1705 } 1706 1707 static int 1708 sysctl_security_setidcorename(SYSCTLFN_ARGS) 1709 { 1710 int error; 1711 char *newsetidcorename; 1712 struct sysctlnode node; 1713 1714 newsetidcorename = PNBUF_GET(); 1715 node = *rnode; 1716 node.sysctl_data = newsetidcorename; 1717 memcpy(node.sysctl_data, rnode->sysctl_data, MAXPATHLEN); 1718 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1719 if (error || newp == NULL) { 1720 goto out; 1721 } 1722 if (kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_SETIDCORE, 1723 0, NULL, NULL, NULL)) { 1724 error = EPERM; 1725 goto out; 1726 } 1727 if (strlen(newsetidcorename) == 0) { 1728 error = EINVAL; 1729 goto out; 1730 } 1731 memcpy(rnode->sysctl_data, node.sysctl_data, MAXPATHLEN); 1732 out: 1733 PNBUF_PUT(newsetidcorename); 1734 return error; 1735 } 1736 1737 /* 1738 * sysctl helper routine for kern.cp_id node. Maps cpus to their 1739 * cpuids. 1740 */ 1741 static int 1742 sysctl_kern_cpid(SYSCTLFN_ARGS) 1743 { 1744 struct sysctlnode node = *rnode; 1745 uint64_t *cp_id = NULL; 1746 int error, n = ncpu; 1747 struct cpu_info *ci; 1748 CPU_INFO_ITERATOR cii; 1749 1750 /* 1751 * Here you may either retrieve a single cpu id or the whole 1752 * set. The size you get back when probing depends on what 1753 * you ask for. 1754 */ 1755 switch (namelen) { 1756 case 0: 1757 node.sysctl_size = n * sizeof(uint64_t); 1758 n = -2; /* ALL */ 1759 break; 1760 case 1: 1761 if (name[0] < 0 || name[0] >= n) 1762 return (ENOENT); /* ENOSUCHPROCESSOR */ 1763 node.sysctl_size = sizeof(uint64_t); 1764 n = name[0]; 1765 /* 1766 * adjust these so that sysctl_lookup() will be happy 1767 */ 1768 name++; 1769 namelen--; 1770 break; 1771 default: 1772 return (EINVAL); 1773 } 1774 1775 cp_id = kmem_alloc(node.sysctl_size, KM_SLEEP); 1776 if (cp_id == NULL) 1777 return (ENOMEM); 1778 node.sysctl_data = cp_id; 1779 memset(cp_id, 0, node.sysctl_size); 1780 1781 for (CPU_INFO_FOREACH(cii, ci)) { 1782 if (n <= 0) 1783 cp_id[0] = cpu_index(ci); 1784 /* 1785 * if a specific processor was requested and we just 1786 * did it, we're done here 1787 */ 1788 if (n == 0) 1789 break; 1790 /* 1791 * if doing "all", skip to next cp_id slot for next processor 1792 */ 1793 if (n == -2) 1794 cp_id++; 1795 /* 1796 * if we're doing a specific processor, we're one 1797 * processor closer 1798 */ 1799 if (n > 0) 1800 n--; 1801 } 1802 1803 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1804 kmem_free(node.sysctl_data, node.sysctl_size); 1805 return (error); 1806 } 1807 1808 /* 1809 * sysctl helper routine for hw.usermem and hw.usermem64. Values are 1810 * calculate on the fly taking into account integer overflow and the 1811 * current wired count. 1812 */ 1813 static int 1814 sysctl_hw_usermem(SYSCTLFN_ARGS) 1815 { 1816 u_int ui; 1817 u_quad_t uq; 1818 struct sysctlnode node; 1819 1820 node = *rnode; 1821 switch (rnode->sysctl_num) { 1822 case HW_USERMEM: 1823 if ((ui = physmem - uvmexp.wired) > (UINT_MAX / PAGE_SIZE)) 1824 ui = UINT_MAX; 1825 else 1826 ui *= PAGE_SIZE; 1827 node.sysctl_data = &ui; 1828 break; 1829 case HW_USERMEM64: 1830 uq = (u_quad_t)(physmem - uvmexp.wired) * PAGE_SIZE; 1831 node.sysctl_data = &uq; 1832 break; 1833 default: 1834 return (EINVAL); 1835 } 1836 1837 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 1838 } 1839 1840 /* 1841 * sysctl helper routine for kern.cnmagic node. Pulls the old value 1842 * out, encoded, and stuffs the new value in for decoding. 1843 */ 1844 static int 1845 sysctl_hw_cnmagic(SYSCTLFN_ARGS) 1846 { 1847 char magic[CNS_LEN]; 1848 int error; 1849 struct sysctlnode node; 1850 1851 if (oldp) 1852 cn_get_magic(magic, CNS_LEN); 1853 node = *rnode; 1854 node.sysctl_data = &magic[0]; 1855 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1856 if (error || newp == NULL) 1857 return (error); 1858 1859 return (cn_set_magic(magic)); 1860 } 1861 1862 /* 1863 * ******************************************************************** 1864 * section 3: public helper routines that are used for more than one 1865 * node 1866 * ******************************************************************** 1867 */ 1868 1869 /* 1870 * sysctl helper routine for the kern.root_device node and some ports' 1871 * machdep.root_device nodes. 1872 */ 1873 int 1874 sysctl_root_device(SYSCTLFN_ARGS) 1875 { 1876 struct sysctlnode node; 1877 1878 node = *rnode; 1879 node.sysctl_data = root_device->dv_xname; 1880 node.sysctl_size = strlen(device_xname(root_device)) + 1; 1881 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 1882 } 1883 1884 /* 1885 * sysctl helper routine for kern.consdev, dependent on the current 1886 * state of the console. Also used for machdep.console_device on some 1887 * ports. 1888 */ 1889 int 1890 sysctl_consdev(SYSCTLFN_ARGS) 1891 { 1892 dev_t consdev; 1893 uint32_t oconsdev; 1894 struct sysctlnode node; 1895 1896 if (cn_tab != NULL) 1897 consdev = cn_tab->cn_dev; 1898 else 1899 consdev = NODEV; 1900 node = *rnode; 1901 switch (*oldlenp) { 1902 case sizeof(consdev): 1903 node.sysctl_data = &consdev; 1904 node.sysctl_size = sizeof(consdev); 1905 break; 1906 case sizeof(oconsdev): 1907 oconsdev = (uint32_t)consdev; 1908 node.sysctl_data = &oconsdev; 1909 node.sysctl_size = sizeof(oconsdev); 1910 break; 1911 default: 1912 return EINVAL; 1913 } 1914 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 1915 } 1916 1917 /* 1918 * ******************************************************************** 1919 * section 4: support for some helpers 1920 * ******************************************************************** 1921 */ 1922 1923 1924 /* 1925 * Fill in a kinfo_lwp structure for the specified lwp. 1926 */ 1927 static void 1928 fill_lwp(struct lwp *l, struct kinfo_lwp *kl) 1929 { 1930 struct proc *p = l->l_proc; 1931 struct timeval tv; 1932 1933 KASSERT(lwp_locked(l, NULL)); 1934 1935 memset(kl, 0, sizeof(*kl)); 1936 1937 kl->l_forw = 0; 1938 kl->l_back = 0; 1939 kl->l_laddr = PTRTOUINT64(l); 1940 kl->l_addr = PTRTOUINT64(l->l_addr); 1941 kl->l_stat = l->l_stat; 1942 kl->l_lid = l->l_lid; 1943 kl->l_flag = L_INMEM; 1944 kl->l_flag |= sysctl_map_flags(sysctl_lwpprflagmap, l->l_prflag); 1945 kl->l_flag |= sysctl_map_flags(sysctl_lwpflagmap, l->l_flag); 1946 1947 kl->l_swtime = l->l_swtime; 1948 kl->l_slptime = l->l_slptime; 1949 if (l->l_stat == LSONPROC) 1950 kl->l_schedflags = l->l_cpu->ci_schedstate.spc_flags; 1951 else 1952 kl->l_schedflags = 0; 1953 kl->l_priority = lwp_eprio(l); 1954 kl->l_usrpri = l->l_priority; 1955 if (l->l_wchan) 1956 strncpy(kl->l_wmesg, l->l_wmesg, sizeof(kl->l_wmesg)); 1957 kl->l_wchan = PTRTOUINT64(l->l_wchan); 1958 kl->l_cpuid = cpu_index(l->l_cpu); 1959 bintime2timeval(&l->l_rtime, &tv); 1960 kl->l_rtime_sec = tv.tv_sec; 1961 kl->l_rtime_usec = tv.tv_usec; 1962 kl->l_cpticks = l->l_cpticks; 1963 kl->l_pctcpu = l->l_pctcpu; 1964 kl->l_pid = p->p_pid; 1965 if (l->l_name == NULL) 1966 kl->l_name[0] = '\0'; 1967 else 1968 strlcpy(kl->l_name, l->l_name, sizeof(kl->l_name)); 1969 } 1970
Indexes created Tue Sep 23 02:09:52 GMT 2025