init_sysctl.c revision 1.193
1 /* $NetBSD: init_sysctl.c,v 1.193 2012/10/27 17:18:39 chs 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 1.193 2012/10/27 17:18:39 chs 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_urnd(SYSCTLFN_PROTO); 160 static int sysctl_kern_arnd(SYSCTLFN_PROTO); 161 static int sysctl_kern_lwp(SYSCTLFN_PROTO); 162 static int sysctl_kern_forkfsleep(SYSCTLFN_PROTO); 163 static int sysctl_kern_root_partition(SYSCTLFN_PROTO); 164 static int sysctl_kern_drivers(SYSCTLFN_PROTO); 165 static int sysctl_security_setidcore(SYSCTLFN_PROTO); 166 static int sysctl_security_setidcorename(SYSCTLFN_PROTO); 167 static int sysctl_kern_cpid(SYSCTLFN_PROTO); 168 static int sysctl_hw_usermem(SYSCTLFN_PROTO); 169 static int sysctl_hw_cnmagic(SYSCTLFN_PROTO); 170 171 static void fill_lwp(struct lwp *l, struct kinfo_lwp *kl); 172 173 /* 174 * ******************************************************************** 175 * section 1: setup routines 176 * ******************************************************************** 177 * These functions are stuffed into a link set for sysctl setup 178 * functions. They're never called or referenced from anywhere else. 179 * ******************************************************************** 180 */ 181 182 /* 183 * this setup routine is a replacement for kern_sysctl() 184 */ 185 SYSCTL_SETUP(sysctl_kern_setup, "sysctl kern subtree setup") 186 { 187 extern int kern_logsigexit; /* defined in kern/kern_sig.c */ 188 extern fixpt_t ccpu; /* defined in kern/kern_synch.c */ 189 extern int dumponpanic; /* defined in kern/subr_prf.c */ 190 const struct sysctlnode *rnode; 191 192 sysctl_createv(clog, 0, NULL, NULL, 193 CTLFLAG_PERMANENT, 194 CTLTYPE_NODE, "kern", NULL, 195 NULL, 0, NULL, 0, 196 CTL_KERN, CTL_EOL); 197 198 sysctl_createv(clog, 0, NULL, NULL, 199 CTLFLAG_PERMANENT, 200 CTLTYPE_STRING, "ostype", 201 SYSCTL_DESCR("Operating system type"), 202 NULL, 0, __UNCONST(&ostype), 0, 203 CTL_KERN, KERN_OSTYPE, CTL_EOL); 204 sysctl_createv(clog, 0, NULL, NULL, 205 CTLFLAG_PERMANENT, 206 CTLTYPE_STRING, "osrelease", 207 SYSCTL_DESCR("Operating system release"), 208 NULL, 0, __UNCONST(&osrelease), 0, 209 CTL_KERN, KERN_OSRELEASE, CTL_EOL); 210 sysctl_createv(clog, 0, NULL, NULL, 211 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 212 CTLTYPE_INT, "osrevision", 213 SYSCTL_DESCR("Operating system revision"), 214 NULL, __NetBSD_Version__, NULL, 0, 215 CTL_KERN, KERN_OSREV, CTL_EOL); 216 sysctl_createv(clog, 0, NULL, NULL, 217 CTLFLAG_PERMANENT, 218 CTLTYPE_STRING, "version", 219 SYSCTL_DESCR("Kernel version"), 220 NULL, 0, __UNCONST(&version), 0, 221 CTL_KERN, KERN_VERSION, CTL_EOL); 222 sysctl_createv(clog, 0, NULL, NULL, 223 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 224 CTLTYPE_INT, "maxvnodes", 225 SYSCTL_DESCR("Maximum number of vnodes"), 226 sysctl_kern_maxvnodes, 0, NULL, 0, 227 CTL_KERN, KERN_MAXVNODES, CTL_EOL); 228 sysctl_createv(clog, 0, NULL, NULL, 229 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 230 CTLTYPE_INT, "maxproc", 231 SYSCTL_DESCR("Maximum number of simultaneous processes"), 232 sysctl_kern_maxproc, 0, NULL, 0, 233 CTL_KERN, KERN_MAXPROC, CTL_EOL); 234 sysctl_createv(clog, 0, NULL, NULL, 235 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 236 CTLTYPE_INT, "maxfiles", 237 SYSCTL_DESCR("Maximum number of open files"), 238 NULL, 0, &maxfiles, 0, 239 CTL_KERN, KERN_MAXFILES, CTL_EOL); 240 sysctl_createv(clog, 0, NULL, NULL, 241 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 242 CTLTYPE_INT, "argmax", 243 SYSCTL_DESCR("Maximum number of bytes of arguments to " 244 "execve(2)"), 245 NULL, ARG_MAX, NULL, 0, 246 CTL_KERN, KERN_ARGMAX, CTL_EOL); 247 sysctl_createv(clog, 0, NULL, NULL, 248 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 249 CTLTYPE_STRING, "hostname", 250 SYSCTL_DESCR("System hostname"), 251 sysctl_setlen, 0, hostname, MAXHOSTNAMELEN, 252 CTL_KERN, KERN_HOSTNAME, CTL_EOL); 253 sysctl_createv(clog, 0, NULL, NULL, 254 CTLFLAG_PERMANENT|CTLFLAG_READWRITE|CTLFLAG_HEX, 255 CTLTYPE_INT, "hostid", 256 SYSCTL_DESCR("System host ID number"), 257 sysctl_kern_hostid, 0, NULL, 0, 258 CTL_KERN, KERN_HOSTID, CTL_EOL); 259 sysctl_createv(clog, 0, NULL, NULL, 260 CTLFLAG_PERMANENT, 261 CTLTYPE_STRUCT, "clockrate", 262 SYSCTL_DESCR("Kernel clock rates"), 263 sysctl_kern_clockrate, 0, NULL, 264 sizeof(struct clockinfo), 265 CTL_KERN, KERN_CLOCKRATE, CTL_EOL); 266 sysctl_createv(clog, 0, NULL, NULL, 267 CTLFLAG_PERMANENT, 268 CTLTYPE_INT, "hardclock_ticks", 269 SYSCTL_DESCR("Number of hardclock ticks"), 270 NULL, 0, &hardclock_ticks, sizeof(hardclock_ticks), 271 CTL_KERN, KERN_HARDCLOCK_TICKS, CTL_EOL); 272 sysctl_createv(clog, 0, NULL, NULL, 273 CTLFLAG_PERMANENT, 274 CTLTYPE_STRUCT, "vnode", 275 SYSCTL_DESCR("System vnode table"), 276 sysctl_kern_vnode, 0, NULL, 0, 277 CTL_KERN, KERN_VNODE, CTL_EOL); 278 #ifndef GPROF 279 sysctl_createv(clog, 0, NULL, NULL, 280 CTLFLAG_PERMANENT, 281 CTLTYPE_NODE, "profiling", 282 SYSCTL_DESCR("Profiling information (not available)"), 283 sysctl_notavail, 0, NULL, 0, 284 CTL_KERN, KERN_PROF, CTL_EOL); 285 #endif 286 sysctl_createv(clog, 0, NULL, NULL, 287 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 288 CTLTYPE_INT, "posix1version", 289 SYSCTL_DESCR("Version of ISO/IEC 9945 (POSIX 1003.1) " 290 "with which the operating system attempts " 291 "to comply"), 292 NULL, _POSIX_VERSION, NULL, 0, 293 CTL_KERN, KERN_POSIX1, CTL_EOL); 294 sysctl_createv(clog, 0, NULL, NULL, 295 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 296 CTLTYPE_INT, "ngroups", 297 SYSCTL_DESCR("Maximum number of supplemental groups"), 298 NULL, NGROUPS_MAX, NULL, 0, 299 CTL_KERN, KERN_NGROUPS, CTL_EOL); 300 sysctl_createv(clog, 0, NULL, NULL, 301 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 302 CTLTYPE_INT, "job_control", 303 SYSCTL_DESCR("Whether job control is available"), 304 NULL, 1, NULL, 0, 305 CTL_KERN, KERN_JOB_CONTROL, CTL_EOL); 306 sysctl_createv(clog, 0, NULL, NULL, 307 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 308 CTLTYPE_INT, "saved_ids", 309 SYSCTL_DESCR("Whether POSIX saved set-group/user ID is " 310 "available"), NULL, 311 #ifdef _POSIX_SAVED_IDS 312 1, 313 #else /* _POSIX_SAVED_IDS */ 314 0, 315 #endif /* _POSIX_SAVED_IDS */ 316 NULL, 0, CTL_KERN, KERN_SAVED_IDS, CTL_EOL); 317 sysctl_createv(clog, 0, NULL, NULL, 318 CTLFLAG_PERMANENT|CTLFLAG_HEX, 319 CTLTYPE_INT, "boothowto", 320 SYSCTL_DESCR("Flags from boot loader"), 321 NULL, 0, &boothowto, sizeof(boothowto), 322 CTL_KERN, CTL_CREATE, CTL_EOL); 323 sysctl_createv(clog, 0, NULL, NULL, 324 CTLFLAG_PERMANENT, 325 CTLTYPE_STRUCT, "boottime", 326 SYSCTL_DESCR("System boot time"), 327 NULL, 0, &boottime, sizeof(boottime), 328 CTL_KERN, KERN_BOOTTIME, CTL_EOL); 329 #ifdef COMPAT_50 330 { 331 extern struct timeval50 boottime50; 332 sysctl_createv(clog, 0, NULL, NULL, 333 CTLFLAG_PERMANENT, 334 CTLTYPE_STRUCT, "oboottime", 335 SYSCTL_DESCR("System boot time"), 336 NULL, 0, &boottime50, sizeof(boottime50), 337 CTL_KERN, KERN_OBOOTTIME, CTL_EOL); 338 } 339 #endif 340 sysctl_createv(clog, 0, NULL, NULL, 341 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 342 CTLTYPE_STRING, "domainname", 343 SYSCTL_DESCR("YP domain name"), 344 sysctl_setlen, 0, domainname, MAXHOSTNAMELEN, 345 CTL_KERN, KERN_DOMAINNAME, CTL_EOL); 346 sysctl_createv(clog, 0, NULL, NULL, 347 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 348 CTLTYPE_INT, "maxpartitions", 349 SYSCTL_DESCR("Maximum number of partitions allowed per " 350 "disk"), 351 NULL, MAXPARTITIONS, NULL, 0, 352 CTL_KERN, KERN_MAXPARTITIONS, CTL_EOL); 353 sysctl_createv(clog, 0, NULL, NULL, 354 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 355 CTLTYPE_INT, "rawpartition", 356 SYSCTL_DESCR("Raw partition of a disk"), 357 NULL, RAW_PART, NULL, 0, 358 CTL_KERN, KERN_RAWPARTITION, CTL_EOL); 359 sysctl_createv(clog, 0, NULL, NULL, 360 CTLFLAG_PERMANENT, 361 CTLTYPE_STRUCT, "timex", NULL, 362 sysctl_notavail, 0, NULL, 0, 363 CTL_KERN, KERN_TIMEX, CTL_EOL); 364 sysctl_createv(clog, 0, NULL, NULL, 365 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 366 CTLTYPE_INT, "rtc_offset", 367 SYSCTL_DESCR("Offset of real time clock from UTC in " 368 "minutes"), 369 sysctl_kern_rtc_offset, 0, &rtc_offset, 0, 370 CTL_KERN, KERN_RTC_OFFSET, CTL_EOL); 371 sysctl_createv(clog, 0, NULL, NULL, 372 CTLFLAG_PERMANENT, 373 CTLTYPE_STRING, "root_device", 374 SYSCTL_DESCR("Name of the root device"), 375 sysctl_root_device, 0, NULL, 0, 376 CTL_KERN, KERN_ROOT_DEVICE, CTL_EOL); 377 sysctl_createv(clog, 0, NULL, NULL, 378 CTLFLAG_PERMANENT, 379 CTLTYPE_INT, "msgbufsize", 380 SYSCTL_DESCR("Size of the kernel message buffer"), 381 sysctl_msgbuf, 0, NULL, 0, 382 CTL_KERN, KERN_MSGBUFSIZE, CTL_EOL); 383 sysctl_createv(clog, 0, NULL, NULL, 384 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 385 CTLTYPE_INT, "fsync", 386 SYSCTL_DESCR("Whether the POSIX 1003.1b File " 387 "Synchronization Option is available on " 388 "this system"), 389 NULL, 1, NULL, 0, 390 CTL_KERN, KERN_FSYNC, CTL_EOL); 391 sysctl_createv(clog, 0, NULL, NULL, 392 CTLFLAG_PERMANENT, 393 CTLTYPE_NODE, "ipc", 394 SYSCTL_DESCR("SysV IPC options"), 395 NULL, 0, NULL, 0, 396 CTL_KERN, KERN_SYSVIPC, CTL_EOL); 397 sysctl_createv(clog, 0, NULL, NULL, 398 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 399 CTLTYPE_INT, "sysvmsg", 400 SYSCTL_DESCR("System V style message support available"), 401 NULL, 402 #ifdef SYSVMSG 403 1, 404 #else /* SYSVMSG */ 405 0, 406 #endif /* SYSVMSG */ 407 NULL, 0, CTL_KERN, KERN_SYSVIPC, KERN_SYSVIPC_MSG, CTL_EOL); 408 sysctl_createv(clog, 0, NULL, NULL, 409 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 410 CTLTYPE_INT, "sysvsem", 411 SYSCTL_DESCR("System V style semaphore support " 412 "available"), NULL, 413 #ifdef SYSVSEM 414 1, 415 #else /* SYSVSEM */ 416 0, 417 #endif /* SYSVSEM */ 418 NULL, 0, CTL_KERN, KERN_SYSVIPC, KERN_SYSVIPC_SEM, CTL_EOL); 419 sysctl_createv(clog, 0, NULL, NULL, 420 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 421 CTLTYPE_INT, "sysvshm", 422 SYSCTL_DESCR("System V style shared memory support " 423 "available"), NULL, 424 #ifdef SYSVSHM 425 1, 426 #else /* SYSVSHM */ 427 0, 428 #endif /* SYSVSHM */ 429 NULL, 0, CTL_KERN, KERN_SYSVIPC, KERN_SYSVIPC_SHM, CTL_EOL); 430 sysctl_createv(clog, 0, NULL, NULL, 431 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 432 CTLTYPE_INT, "synchronized_io", 433 SYSCTL_DESCR("Whether the POSIX 1003.1b Synchronized " 434 "I/O Option is available on this system"), 435 NULL, 1, NULL, 0, 436 CTL_KERN, KERN_SYNCHRONIZED_IO, CTL_EOL); 437 sysctl_createv(clog, 0, NULL, NULL, 438 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 439 CTLTYPE_INT, "iov_max", 440 SYSCTL_DESCR("Maximum number of iovec structures per " 441 "process"), 442 NULL, IOV_MAX, NULL, 0, 443 CTL_KERN, KERN_IOV_MAX, CTL_EOL); 444 sysctl_createv(clog, 0, NULL, NULL, 445 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 446 CTLTYPE_INT, "mapped_files", 447 SYSCTL_DESCR("Whether the POSIX 1003.1b Memory Mapped " 448 "Files Option is available on this system"), 449 NULL, 1, NULL, 0, 450 CTL_KERN, KERN_MAPPED_FILES, CTL_EOL); 451 sysctl_createv(clog, 0, NULL, NULL, 452 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 453 CTLTYPE_INT, "memlock", 454 SYSCTL_DESCR("Whether the POSIX 1003.1b Process Memory " 455 "Locking Option is available on this " 456 "system"), 457 NULL, 1, NULL, 0, 458 CTL_KERN, KERN_MEMLOCK, CTL_EOL); 459 sysctl_createv(clog, 0, NULL, NULL, 460 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 461 CTLTYPE_INT, "memlock_range", 462 SYSCTL_DESCR("Whether the POSIX 1003.1b Range Memory " 463 "Locking Option is available on this " 464 "system"), 465 NULL, 1, NULL, 0, 466 CTL_KERN, KERN_MEMLOCK_RANGE, CTL_EOL); 467 sysctl_createv(clog, 0, NULL, NULL, 468 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 469 CTLTYPE_INT, "memory_protection", 470 SYSCTL_DESCR("Whether the POSIX 1003.1b Memory " 471 "Protection Option is available on this " 472 "system"), 473 NULL, 1, NULL, 0, 474 CTL_KERN, KERN_MEMORY_PROTECTION, CTL_EOL); 475 sysctl_createv(clog, 0, NULL, NULL, 476 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 477 CTLTYPE_INT, "login_name_max", 478 SYSCTL_DESCR("Maximum login name length"), 479 NULL, LOGIN_NAME_MAX, NULL, 0, 480 CTL_KERN, KERN_LOGIN_NAME_MAX, CTL_EOL); 481 sysctl_createv(clog, 0, NULL, NULL, 482 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 483 CTLTYPE_STRING, "defcorename", 484 SYSCTL_DESCR("Default core file name"), 485 sysctl_kern_defcorename, 0, defcorename, MAXPATHLEN, 486 CTL_KERN, KERN_DEFCORENAME, CTL_EOL); 487 sysctl_createv(clog, 0, NULL, NULL, 488 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 489 CTLTYPE_INT, "logsigexit", 490 SYSCTL_DESCR("Log process exit when caused by signals"), 491 NULL, 0, &kern_logsigexit, 0, 492 CTL_KERN, KERN_LOGSIGEXIT, CTL_EOL); 493 sysctl_createv(clog, 0, NULL, NULL, 494 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 495 CTLTYPE_INT, "fscale", 496 SYSCTL_DESCR("Kernel fixed-point scale factor"), 497 NULL, FSCALE, NULL, 0, 498 CTL_KERN, KERN_FSCALE, CTL_EOL); 499 sysctl_createv(clog, 0, NULL, NULL, 500 CTLFLAG_PERMANENT, 501 CTLTYPE_INT, "ccpu", 502 SYSCTL_DESCR("Scheduler exponential decay value"), 503 NULL, 0, &ccpu, 0, 504 CTL_KERN, KERN_CCPU, CTL_EOL); 505 sysctl_createv(clog, 0, NULL, NULL, 506 CTLFLAG_PERMANENT, 507 CTLTYPE_STRUCT, "cp_time", 508 SYSCTL_DESCR("Clock ticks spent in different CPU states"), 509 sysctl_kern_cptime, 0, NULL, 0, 510 CTL_KERN, KERN_CP_TIME, CTL_EOL); 511 sysctl_createv(clog, 0, NULL, NULL, 512 CTLFLAG_PERMANENT, 513 CTLTYPE_INT, "msgbuf", 514 SYSCTL_DESCR("Kernel message buffer"), 515 sysctl_msgbuf, 0, NULL, 0, 516 CTL_KERN, KERN_MSGBUF, CTL_EOL); 517 sysctl_createv(clog, 0, NULL, NULL, 518 CTLFLAG_PERMANENT, 519 CTLTYPE_STRUCT, "consdev", 520 SYSCTL_DESCR("Console device"), 521 sysctl_consdev, 0, NULL, sizeof(dev_t), 522 CTL_KERN, KERN_CONSDEV, CTL_EOL); 523 #if NPTY > 0 524 sysctl_createv(clog, 0, NULL, NULL, 525 CTLFLAG_PERMANENT, 526 CTLTYPE_INT, "maxptys", 527 SYSCTL_DESCR("Maximum number of pseudo-ttys"), 528 sysctl_kern_maxptys, 0, NULL, 0, 529 CTL_KERN, KERN_MAXPTYS, CTL_EOL); 530 #endif /* NPTY > 0 */ 531 sysctl_createv(clog, 0, NULL, NULL, 532 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 533 CTLTYPE_INT, "maxphys", 534 SYSCTL_DESCR("Maximum raw I/O transfer size"), 535 NULL, MAXPHYS, NULL, 0, 536 CTL_KERN, KERN_MAXPHYS, CTL_EOL); 537 sysctl_createv(clog, 0, NULL, NULL, 538 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 539 CTLTYPE_INT, "monotonic_clock", 540 SYSCTL_DESCR("Implementation version of the POSIX " 541 "1003.1b Monotonic Clock Option"), 542 /* XXX _POSIX_VERSION */ 543 NULL, _POSIX_MONOTONIC_CLOCK, NULL, 0, 544 CTL_KERN, KERN_MONOTONIC_CLOCK, CTL_EOL); 545 sysctl_createv(clog, 0, NULL, NULL, 546 CTLFLAG_PERMANENT, 547 CTLTYPE_INT, "urandom", 548 SYSCTL_DESCR("Random integer value"), 549 sysctl_kern_urnd, 0, NULL, 0, 550 CTL_KERN, KERN_URND, CTL_EOL); 551 sysctl_createv(clog, 0, NULL, NULL, 552 CTLFLAG_PERMANENT, 553 CTLTYPE_INT, "arandom", 554 SYSCTL_DESCR("n bytes of random data"), 555 sysctl_kern_arnd, 0, NULL, 0, 556 CTL_KERN, KERN_ARND, CTL_EOL); 557 sysctl_createv(clog, 0, NULL, NULL, 558 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 559 CTLTYPE_INT, "labelsector", 560 SYSCTL_DESCR("Sector number containing the disklabel"), 561 NULL, LABELSECTOR, NULL, 0, 562 CTL_KERN, KERN_LABELSECTOR, CTL_EOL); 563 sysctl_createv(clog, 0, NULL, NULL, 564 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 565 CTLTYPE_INT, "labeloffset", 566 SYSCTL_DESCR("Offset of the disklabel within the " 567 "sector"), 568 NULL, LABELOFFSET, NULL, 0, 569 CTL_KERN, KERN_LABELOFFSET, CTL_EOL); 570 sysctl_createv(clog, 0, NULL, NULL, 571 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 572 CTLTYPE_INT, "labelusesmbr", 573 SYSCTL_DESCR("disklabel is inside MBR partition"), 574 NULL, LABELUSESMBR, NULL, 0, 575 CTL_KERN, CTL_CREATE, CTL_EOL); 576 sysctl_createv(clog, 0, NULL, NULL, 577 CTLFLAG_PERMANENT, 578 CTLTYPE_NODE, "lwp", 579 SYSCTL_DESCR("System-wide LWP information"), 580 sysctl_kern_lwp, 0, NULL, 0, 581 CTL_KERN, KERN_LWP, CTL_EOL); 582 sysctl_createv(clog, 0, NULL, NULL, 583 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 584 CTLTYPE_INT, "forkfsleep", 585 SYSCTL_DESCR("Milliseconds to sleep on fork failure due " 586 "to process limits"), 587 sysctl_kern_forkfsleep, 0, NULL, 0, 588 CTL_KERN, KERN_FORKFSLEEP, CTL_EOL); 589 sysctl_createv(clog, 0, NULL, NULL, 590 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 591 CTLTYPE_INT, "posix_threads", 592 SYSCTL_DESCR("Version of IEEE Std 1003.1 and its " 593 "Threads option to which the system " 594 "attempts to conform"), 595 /* XXX _POSIX_VERSION */ 596 NULL, _POSIX_THREADS, NULL, 0, 597 CTL_KERN, KERN_POSIX_THREADS, CTL_EOL); 598 sysctl_createv(clog, 0, NULL, NULL, 599 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 600 CTLTYPE_INT, "posix_semaphores", 601 SYSCTL_DESCR("Version of IEEE Std 1003.1 and its " 602 "Semaphores option to which the system " 603 "attempts to conform"), NULL, 604 200112, NULL, 0, 605 CTL_KERN, KERN_POSIX_SEMAPHORES, CTL_EOL); 606 sysctl_createv(clog, 0, NULL, NULL, 607 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 608 CTLTYPE_INT, "posix_barriers", 609 SYSCTL_DESCR("Version of IEEE Std 1003.1 and its " 610 "Barriers option to which the system " 611 "attempts to conform"), 612 /* XXX _POSIX_VERSION */ 613 NULL, _POSIX_BARRIERS, NULL, 0, 614 CTL_KERN, KERN_POSIX_BARRIERS, CTL_EOL); 615 sysctl_createv(clog, 0, NULL, NULL, 616 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 617 CTLTYPE_INT, "posix_timers", 618 SYSCTL_DESCR("Version of IEEE Std 1003.1 and its " 619 "Timers option to which the system " 620 "attempts to conform"), 621 /* XXX _POSIX_VERSION */ 622 NULL, _POSIX_TIMERS, NULL, 0, 623 CTL_KERN, KERN_POSIX_TIMERS, CTL_EOL); 624 sysctl_createv(clog, 0, NULL, NULL, 625 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 626 CTLTYPE_INT, "posix_spin_locks", 627 SYSCTL_DESCR("Version of IEEE Std 1003.1 and its Spin " 628 "Locks option to which the system attempts " 629 "to conform"), 630 /* XXX _POSIX_VERSION */ 631 NULL, _POSIX_SPIN_LOCKS, NULL, 0, 632 CTL_KERN, KERN_POSIX_SPIN_LOCKS, CTL_EOL); 633 sysctl_createv(clog, 0, NULL, NULL, 634 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 635 CTLTYPE_INT, "posix_reader_writer_locks", 636 SYSCTL_DESCR("Version of IEEE Std 1003.1 and its " 637 "Read-Write Locks option to which the " 638 "system attempts to conform"), 639 /* XXX _POSIX_VERSION */ 640 NULL, _POSIX_READER_WRITER_LOCKS, NULL, 0, 641 CTL_KERN, KERN_POSIX_READER_WRITER_LOCKS, CTL_EOL); 642 sysctl_createv(clog, 0, NULL, NULL, 643 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 644 CTLTYPE_INT, "dump_on_panic", 645 SYSCTL_DESCR("Perform a crash dump on system panic"), 646 NULL, 0, &dumponpanic, 0, 647 CTL_KERN, KERN_DUMP_ON_PANIC, CTL_EOL); 648 #ifdef DIAGNOSTIC 649 sysctl_createv(clog, 0, NULL, NULL, 650 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 651 CTLTYPE_INT, "panic_now", 652 SYSCTL_DESCR("Trigger a panic"), 653 sysctl_kern_trigger_panic, 0, NULL, 0, 654 CTL_KERN, CTL_CREATE, CTL_EOL); 655 #endif 656 sysctl_createv(clog, 0, NULL, NULL, 657 CTLFLAG_PERMANENT, 658 CTLTYPE_INT, "root_partition", 659 SYSCTL_DESCR("Root partition on the root device"), 660 sysctl_kern_root_partition, 0, NULL, 0, 661 CTL_KERN, KERN_ROOT_PARTITION, CTL_EOL); 662 sysctl_createv(clog, 0, NULL, NULL, 663 CTLFLAG_PERMANENT, 664 CTLTYPE_STRUCT, "drivers", 665 SYSCTL_DESCR("List of all drivers with block and " 666 "character device numbers"), 667 sysctl_kern_drivers, 0, NULL, 0, 668 CTL_KERN, KERN_DRIVERS, CTL_EOL); 669 sysctl_createv(clog, 0, NULL, NULL, 670 CTLFLAG_PERMANENT, 671 CTLTYPE_STRUCT, "cp_id", 672 SYSCTL_DESCR("Mapping of CPU number to CPU id"), 673 sysctl_kern_cpid, 0, NULL, 0, 674 CTL_KERN, KERN_CP_ID, CTL_EOL); 675 sysctl_createv(clog, 0, NULL, &rnode, 676 CTLFLAG_PERMANENT, 677 CTLTYPE_NODE, "coredump", 678 SYSCTL_DESCR("Coredump settings."), 679 NULL, 0, NULL, 0, 680 CTL_KERN, CTL_CREATE, CTL_EOL); 681 sysctl_createv(clog, 0, &rnode, &rnode, 682 CTLFLAG_PERMANENT, 683 CTLTYPE_NODE, "setid", 684 SYSCTL_DESCR("Set-id processes' coredump settings."), 685 NULL, 0, NULL, 0, 686 CTL_CREATE, CTL_EOL); 687 sysctl_createv(clog, 0, &rnode, NULL, 688 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 689 CTLTYPE_INT, "dump", 690 SYSCTL_DESCR("Allow set-id processes to dump core."), 691 sysctl_security_setidcore, 0, &security_setidcore_dump, 692 sizeof(security_setidcore_dump), 693 CTL_CREATE, CTL_EOL); 694 sysctl_createv(clog, 0, &rnode, NULL, 695 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 696 CTLTYPE_STRING, "path", 697 SYSCTL_DESCR("Path pattern for set-id coredumps."), 698 sysctl_security_setidcorename, 0, 699 security_setidcore_path, 700 sizeof(security_setidcore_path), 701 CTL_CREATE, CTL_EOL); 702 sysctl_createv(clog, 0, &rnode, NULL, 703 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 704 CTLTYPE_INT, "owner", 705 SYSCTL_DESCR("Owner id for set-id processes' cores."), 706 sysctl_security_setidcore, 0, &security_setidcore_owner, 707 0, 708 CTL_CREATE, CTL_EOL); 709 sysctl_createv(clog, 0, &rnode, NULL, 710 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 711 CTLTYPE_INT, "group", 712 SYSCTL_DESCR("Group id for set-id processes' cores."), 713 sysctl_security_setidcore, 0, &security_setidcore_group, 714 0, 715 CTL_CREATE, CTL_EOL); 716 sysctl_createv(clog, 0, &rnode, NULL, 717 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 718 CTLTYPE_INT, "mode", 719 SYSCTL_DESCR("Mode for set-id processes' cores."), 720 sysctl_security_setidcore, 0, &security_setidcore_mode, 721 0, 722 CTL_CREATE, CTL_EOL); 723 sysctl_createv(clog, 0, NULL, NULL, 724 CTLFLAG_IMMEDIATE|CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 725 CTLTYPE_INT, "no_sa_support", 726 SYSCTL_DESCR("0 if the kernel supports SA, otherwise " 727 "it doesn't"), 728 NULL, 1, NULL, 0, 729 CTL_KERN, CTL_CREATE, CTL_EOL); 730 /* kern.posix. */ 731 sysctl_createv(clog, 0, NULL, &rnode, 732 CTLFLAG_PERMANENT, 733 CTLTYPE_NODE, "posix", 734 SYSCTL_DESCR("POSIX options"), 735 NULL, 0, NULL, 0, 736 CTL_KERN, CTL_CREATE, CTL_EOL); 737 sysctl_createv(clog, 0, &rnode, NULL, 738 CTLFLAG_PERMANENT | CTLFLAG_READWRITE, 739 CTLTYPE_INT, "semmax", 740 SYSCTL_DESCR("Maximal number of semaphores"), 741 NULL, 0, &ksem_max, 0, 742 CTL_CREATE, CTL_EOL); 743 } 744 745 SYSCTL_SETUP(sysctl_hw_setup, "sysctl hw subtree setup") 746 { 747 u_int u; 748 u_quad_t q; 749 750 sysctl_createv(clog, 0, NULL, NULL, 751 CTLFLAG_PERMANENT, 752 CTLTYPE_NODE, "hw", NULL, 753 NULL, 0, NULL, 0, 754 CTL_HW, CTL_EOL); 755 756 sysctl_createv(clog, 0, NULL, NULL, 757 CTLFLAG_PERMANENT, 758 CTLTYPE_STRING, "machine", 759 SYSCTL_DESCR("Machine class"), 760 NULL, 0, machine, 0, 761 CTL_HW, HW_MACHINE, CTL_EOL); 762 sysctl_createv(clog, 0, NULL, NULL, 763 CTLFLAG_PERMANENT, 764 CTLTYPE_STRING, "model", 765 SYSCTL_DESCR("Machine model"), 766 NULL, 0, cpu_model, 0, 767 CTL_HW, HW_MODEL, CTL_EOL); 768 sysctl_createv(clog, 0, NULL, NULL, 769 CTLFLAG_PERMANENT, 770 CTLTYPE_INT, "ncpu", 771 SYSCTL_DESCR("Number of CPUs configured"), 772 NULL, 0, &ncpu, 0, 773 CTL_HW, HW_NCPU, CTL_EOL); 774 sysctl_createv(clog, 0, NULL, NULL, 775 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 776 CTLTYPE_INT, "byteorder", 777 SYSCTL_DESCR("System byte order"), 778 NULL, BYTE_ORDER, NULL, 0, 779 CTL_HW, HW_BYTEORDER, CTL_EOL); 780 u = ((u_int)physmem > (UINT_MAX / PAGE_SIZE)) ? 781 UINT_MAX : physmem * PAGE_SIZE; 782 sysctl_createv(clog, 0, NULL, NULL, 783 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 784 CTLTYPE_INT, "physmem", 785 SYSCTL_DESCR("Bytes of physical memory"), 786 NULL, u, NULL, 0, 787 CTL_HW, HW_PHYSMEM, CTL_EOL); 788 sysctl_createv(clog, 0, NULL, NULL, 789 CTLFLAG_PERMANENT, 790 CTLTYPE_INT, "usermem", 791 SYSCTL_DESCR("Bytes of non-kernel memory"), 792 sysctl_hw_usermem, 0, NULL, 0, 793 CTL_HW, HW_USERMEM, CTL_EOL); 794 sysctl_createv(clog, 0, NULL, NULL, 795 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 796 CTLTYPE_INT, "pagesize", 797 SYSCTL_DESCR("Software page size"), 798 NULL, PAGE_SIZE, NULL, 0, 799 CTL_HW, HW_PAGESIZE, CTL_EOL); 800 sysctl_createv(clog, 0, NULL, NULL, 801 CTLFLAG_PERMANENT, 802 CTLTYPE_STRING, "machine_arch", 803 SYSCTL_DESCR("Machine CPU class"), 804 NULL, 0, machine_arch, 0, 805 CTL_HW, HW_MACHINE_ARCH, CTL_EOL); 806 sysctl_createv(clog, 0, NULL, NULL, 807 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 808 CTLTYPE_INT, "alignbytes", 809 SYSCTL_DESCR("Alignment constraint for all possible " 810 "data types"), 811 NULL, ALIGNBYTES, NULL, 0, 812 CTL_HW, HW_ALIGNBYTES, CTL_EOL); 813 sysctl_createv(clog, 0, NULL, NULL, 814 CTLFLAG_PERMANENT|CTLFLAG_READWRITE|CTLFLAG_HEX, 815 CTLTYPE_STRING, "cnmagic", 816 SYSCTL_DESCR("Console magic key sequence"), 817 sysctl_hw_cnmagic, 0, NULL, CNS_LEN, 818 CTL_HW, HW_CNMAGIC, CTL_EOL); 819 q = (u_quad_t)physmem * PAGE_SIZE; 820 sysctl_createv(clog, 0, NULL, NULL, 821 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 822 CTLTYPE_QUAD, "physmem64", 823 SYSCTL_DESCR("Bytes of physical memory"), 824 NULL, q, NULL, 0, 825 CTL_HW, HW_PHYSMEM64, CTL_EOL); 826 sysctl_createv(clog, 0, NULL, NULL, 827 CTLFLAG_PERMANENT, 828 CTLTYPE_QUAD, "usermem64", 829 SYSCTL_DESCR("Bytes of non-kernel memory"), 830 sysctl_hw_usermem, 0, NULL, 0, 831 CTL_HW, HW_USERMEM64, CTL_EOL); 832 sysctl_createv(clog, 0, NULL, NULL, 833 CTLFLAG_PERMANENT, 834 CTLTYPE_INT, "ncpuonline", 835 SYSCTL_DESCR("Number of CPUs online"), 836 NULL, 0, &ncpuonline, 0, 837 CTL_HW, HW_NCPUONLINE, CTL_EOL); 838 } 839 840 #ifdef DEBUG 841 /* 842 * Debugging related system variables. 843 */ 844 struct ctldebug /* debug0, */ /* debug1, */ debug2, debug3, debug4; 845 struct ctldebug debug5, debug6, debug7, debug8, debug9; 846 struct ctldebug debug10, debug11, debug12, debug13, debug14; 847 struct ctldebug debug15, debug16, debug17, debug18, debug19; 848 static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = { 849 &debug0, &debug1, &debug2, &debug3, &debug4, 850 &debug5, &debug6, &debug7, &debug8, &debug9, 851 &debug10, &debug11, &debug12, &debug13, &debug14, 852 &debug15, &debug16, &debug17, &debug18, &debug19, 853 }; 854 855 /* 856 * this setup routine is a replacement for debug_sysctl() 857 * 858 * note that it creates several nodes per defined debug variable 859 */ 860 SYSCTL_SETUP(sysctl_debug_setup, "sysctl debug subtree setup") 861 { 862 struct ctldebug *cdp; 863 char nodename[20]; 864 int i; 865 866 /* 867 * two ways here: 868 * 869 * the "old" way (debug.name -> value) which was emulated by 870 * the sysctl(8) binary 871 * 872 * the new way, which the sysctl(8) binary was actually using 873 874 node debug 875 node debug.0 876 string debug.0.name 877 int debug.0.value 878 int debug.name 879 880 */ 881 882 sysctl_createv(clog, 0, NULL, NULL, 883 CTLFLAG_PERMANENT, 884 CTLTYPE_NODE, "debug", NULL, 885 NULL, 0, NULL, 0, 886 CTL_DEBUG, CTL_EOL); 887 888 for (i = 0; i < CTL_DEBUG_MAXID; i++) { 889 cdp = debugvars[i]; 890 if (cdp->debugname == NULL || cdp->debugvar == NULL) 891 continue; 892 893 snprintf(nodename, sizeof(nodename), "debug%d", i); 894 sysctl_createv(clog, 0, NULL, NULL, 895 CTLFLAG_PERMANENT|CTLFLAG_HIDDEN, 896 CTLTYPE_NODE, nodename, NULL, 897 NULL, 0, NULL, 0, 898 CTL_DEBUG, i, CTL_EOL); 899 sysctl_createv(clog, 0, NULL, NULL, 900 CTLFLAG_PERMANENT|CTLFLAG_HIDDEN, 901 CTLTYPE_STRING, "name", NULL, 902 /*XXXUNCONST*/ 903 NULL, 0, __UNCONST(cdp->debugname), 0, 904 CTL_DEBUG, i, CTL_DEBUG_NAME, CTL_EOL); 905 sysctl_createv(clog, 0, NULL, NULL, 906 CTLFLAG_PERMANENT|CTLFLAG_HIDDEN, 907 CTLTYPE_INT, "value", NULL, 908 NULL, 0, cdp->debugvar, 0, 909 CTL_DEBUG, i, CTL_DEBUG_VALUE, CTL_EOL); 910 sysctl_createv(clog, 0, NULL, NULL, 911 CTLFLAG_PERMANENT, 912 CTLTYPE_INT, cdp->debugname, NULL, 913 NULL, 0, cdp->debugvar, 0, 914 CTL_DEBUG, CTL_CREATE, CTL_EOL); 915 } 916 } 917 #endif /* DEBUG */ 918 919 /* 920 * ******************************************************************** 921 * section 2: private node-specific helper routines. 922 * ******************************************************************** 923 */ 924 925 #ifdef DIAGNOSTIC 926 static int 927 sysctl_kern_trigger_panic(SYSCTLFN_ARGS) 928 { 929 int newtrig, error; 930 struct sysctlnode node; 931 932 newtrig = 0; 933 node = *rnode; 934 node.sysctl_data = &newtrig; 935 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 936 if (error || newp == NULL) 937 return (error); 938 939 if (newtrig != 0) 940 panic("Panic triggered"); 941 942 return (error); 943 } 944 #endif 945 946 /* 947 * sysctl helper routine for kern.maxvnodes. Drain vnodes if 948 * new value is lower than desiredvnodes and then calls reinit 949 * routines that needs to adjust to the new value. 950 */ 951 static int 952 sysctl_kern_maxvnodes(SYSCTLFN_ARGS) 953 { 954 int error, new_vnodes, old_vnodes, new_max; 955 struct sysctlnode node; 956 957 new_vnodes = desiredvnodes; 958 node = *rnode; 959 node.sysctl_data = &new_vnodes; 960 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 961 if (error || newp == NULL) 962 return (error); 963 964 /* 965 * sysctl passes down unsigned values, require them 966 * to be positive 967 */ 968 if (new_vnodes <= 0) 969 return (EINVAL); 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.urandom node. Picks a random number 1347 * for you. 1348 */ 1349 static int 1350 sysctl_kern_urnd(SYSCTLFN_ARGS) 1351 { 1352 int v, rv; 1353 1354 rv = cprng_strong(sysctl_prng, &v, sizeof(v), 0); 1355 if (rv == sizeof(v)) { 1356 struct sysctlnode node = *rnode; 1357 node.sysctl_data = &v; 1358 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 1359 } 1360 else 1361 return (EIO); /*XXX*/ 1362 } 1363 1364 /* 1365 * sysctl helper routine for kern.arandom node. Picks a random number 1366 * for you. 1367 */ 1368 static int 1369 sysctl_kern_arnd(SYSCTLFN_ARGS) 1370 { 1371 int error; 1372 void *v; 1373 struct sysctlnode node = *rnode; 1374 1375 if (*oldlenp == 0) 1376 return 0; 1377 /* 1378 * This code used to allow sucking 8192 bytes at a time out 1379 * of the kernel arc4random generator. Evidently there is some 1380 * very old OpenBSD application code that may try to do this. 1381 * 1382 * Note that this node is documented as type "INT" -- 4 or 8 1383 * bytes, not 8192. 1384 * 1385 * We continue to support this abuse of the "len" pointer here 1386 * but only 256 bytes at a time, as, anecdotally, the actual 1387 * application use here was to generate RC4 keys in userspace. 1388 * 1389 * Support for such large requests will probably be removed 1390 * entirely in the future. 1391 */ 1392 if (*oldlenp > 256) 1393 return E2BIG; 1394 1395 v = kmem_alloc(*oldlenp, KM_SLEEP); 1396 cprng_fast(v, *oldlenp); 1397 node.sysctl_data = v; 1398 node.sysctl_size = *oldlenp; 1399 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1400 kmem_free(v, *oldlenp); 1401 return error; 1402 } 1403 /* 1404 * sysctl helper routine to do kern.lwp.* work. 1405 */ 1406 static int 1407 sysctl_kern_lwp(SYSCTLFN_ARGS) 1408 { 1409 struct kinfo_lwp klwp; 1410 struct proc *p; 1411 struct lwp *l2, *l3; 1412 char *where, *dp; 1413 int pid, elem_size, elem_count; 1414 int buflen, needed, error; 1415 bool gotit; 1416 1417 if (namelen == 1 && name[0] == CTL_QUERY) 1418 return (sysctl_query(SYSCTLFN_CALL(rnode))); 1419 1420 dp = where = oldp; 1421 buflen = where != NULL ? *oldlenp : 0; 1422 error = needed = 0; 1423 1424 if (newp != NULL || namelen != 3) 1425 return (EINVAL); 1426 pid = name[0]; 1427 elem_size = name[1]; 1428 elem_count = name[2]; 1429 1430 sysctl_unlock(); 1431 if (pid == -1) { 1432 mutex_enter(proc_lock); 1433 PROCLIST_FOREACH(p, &allproc) { 1434 /* Grab a hold on the process. */ 1435 if (!rw_tryenter(&p->p_reflock, RW_READER)) { 1436 continue; 1437 } 1438 mutex_exit(proc_lock); 1439 1440 mutex_enter(p->p_lock); 1441 LIST_FOREACH(l2, &p->p_lwps, l_sibling) { 1442 if (buflen >= elem_size && elem_count > 0) { 1443 lwp_lock(l2); 1444 fill_lwp(l2, &klwp); 1445 lwp_unlock(l2); 1446 mutex_exit(p->p_lock); 1447 1448 /* 1449 * Copy out elem_size, but not 1450 * larger than the size of a 1451 * struct kinfo_proc2. 1452 */ 1453 error = dcopyout(l, &klwp, dp, 1454 min(sizeof(klwp), elem_size)); 1455 if (error) { 1456 rw_exit(&p->p_reflock); 1457 goto cleanup; 1458 } 1459 mutex_enter(p->p_lock); 1460 LIST_FOREACH(l3, &p->p_lwps, 1461 l_sibling) { 1462 if (l2 == l3) 1463 break; 1464 } 1465 if (l3 == NULL) { 1466 mutex_exit(p->p_lock); 1467 rw_exit(&p->p_reflock); 1468 error = EAGAIN; 1469 goto cleanup; 1470 } 1471 dp += elem_size; 1472 buflen -= elem_size; 1473 elem_count--; 1474 } 1475 needed += elem_size; 1476 } 1477 mutex_exit(p->p_lock); 1478 1479 /* Drop reference to process. */ 1480 mutex_enter(proc_lock); 1481 rw_exit(&p->p_reflock); 1482 } 1483 mutex_exit(proc_lock); 1484 } else { 1485 mutex_enter(proc_lock); 1486 p = proc_find(pid); 1487 if (p == NULL) { 1488 error = ESRCH; 1489 mutex_exit(proc_lock); 1490 goto cleanup; 1491 } 1492 /* Grab a hold on the process. */ 1493 gotit = rw_tryenter(&p->p_reflock, RW_READER); 1494 mutex_exit(proc_lock); 1495 if (!gotit) { 1496 error = ESRCH; 1497 goto cleanup; 1498 } 1499 1500 mutex_enter(p->p_lock); 1501 LIST_FOREACH(l2, &p->p_lwps, l_sibling) { 1502 if (buflen >= elem_size && elem_count > 0) { 1503 lwp_lock(l2); 1504 fill_lwp(l2, &klwp); 1505 lwp_unlock(l2); 1506 mutex_exit(p->p_lock); 1507 /* 1508 * Copy out elem_size, but not larger than 1509 * the size of a struct kinfo_proc2. 1510 */ 1511 error = dcopyout(l, &klwp, dp, 1512 min(sizeof(klwp), elem_size)); 1513 if (error) { 1514 rw_exit(&p->p_reflock); 1515 goto cleanup; 1516 } 1517 mutex_enter(p->p_lock); 1518 LIST_FOREACH(l3, &p->p_lwps, l_sibling) { 1519 if (l2 == l3) 1520 break; 1521 } 1522 if (l3 == NULL) { 1523 mutex_exit(p->p_lock); 1524 rw_exit(&p->p_reflock); 1525 error = EAGAIN; 1526 goto cleanup; 1527 } 1528 dp += elem_size; 1529 buflen -= elem_size; 1530 elem_count--; 1531 } 1532 needed += elem_size; 1533 } 1534 mutex_exit(p->p_lock); 1535 1536 /* Drop reference to process. */ 1537 rw_exit(&p->p_reflock); 1538 } 1539 1540 if (where != NULL) { 1541 *oldlenp = dp - where; 1542 if (needed > *oldlenp) { 1543 sysctl_relock(); 1544 return (ENOMEM); 1545 } 1546 } else { 1547 needed += KERN_LWPSLOP; 1548 *oldlenp = needed; 1549 } 1550 error = 0; 1551 cleanup: 1552 sysctl_relock(); 1553 return (error); 1554 } 1555 1556 /* 1557 * sysctl helper routine for kern.forkfsleep node. Ensures that the 1558 * given value is not too large or two small, and is at least one 1559 * timer tick if not zero. 1560 */ 1561 static int 1562 sysctl_kern_forkfsleep(SYSCTLFN_ARGS) 1563 { 1564 /* userland sees value in ms, internally is in ticks */ 1565 extern int forkfsleep; /* defined in kern/kern_fork.c */ 1566 int error, timo, lsleep; 1567 struct sysctlnode node; 1568 1569 lsleep = forkfsleep * 1000 / hz; 1570 node = *rnode; 1571 node.sysctl_data = &lsleep; 1572 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1573 if (error || newp == NULL) 1574 return (error); 1575 1576 /* refuse negative values, and overly 'long time' */ 1577 if (lsleep < 0 || lsleep > MAXSLP * 1000) 1578 return (EINVAL); 1579 1580 timo = mstohz(lsleep); 1581 1582 /* if the interval is >0 ms && <1 tick, use 1 tick */ 1583 if (lsleep != 0 && timo == 0) 1584 forkfsleep = 1; 1585 else 1586 forkfsleep = timo; 1587 1588 return (0); 1589 } 1590 1591 /* 1592 * sysctl helper routine for kern.root_partition 1593 */ 1594 static int 1595 sysctl_kern_root_partition(SYSCTLFN_ARGS) 1596 { 1597 int rootpart = DISKPART(rootdev); 1598 struct sysctlnode node = *rnode; 1599 1600 node.sysctl_data = &rootpart; 1601 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 1602 } 1603 1604 /* 1605 * sysctl helper function for kern.drivers 1606 */ 1607 static int 1608 sysctl_kern_drivers(SYSCTLFN_ARGS) 1609 { 1610 int error; 1611 size_t buflen; 1612 struct kinfo_drivers kd; 1613 char *start, *where; 1614 const char *dname; 1615 int i; 1616 extern struct devsw_conv *devsw_conv; 1617 extern int max_devsw_convs; 1618 1619 start = where = oldp; 1620 buflen = *oldlenp; 1621 if (where == NULL) { 1622 *oldlenp = max_devsw_convs * sizeof kd; 1623 return 0; 1624 } 1625 1626 /* 1627 * An array of kinfo_drivers structures 1628 */ 1629 error = 0; 1630 sysctl_unlock(); 1631 mutex_enter(&device_lock); 1632 for (i = 0; i < max_devsw_convs; i++) { 1633 dname = devsw_conv[i].d_name; 1634 if (dname == NULL) 1635 continue; 1636 if (buflen < sizeof kd) { 1637 error = ENOMEM; 1638 break; 1639 } 1640 memset(&kd, 0, sizeof(kd)); 1641 kd.d_bmajor = devsw_conv[i].d_bmajor; 1642 kd.d_cmajor = devsw_conv[i].d_cmajor; 1643 strlcpy(kd.d_name, dname, sizeof kd.d_name); 1644 mutex_exit(&device_lock); 1645 error = dcopyout(l, &kd, where, sizeof kd); 1646 mutex_enter(&device_lock); 1647 if (error != 0) 1648 break; 1649 buflen -= sizeof kd; 1650 where += sizeof kd; 1651 } 1652 mutex_exit(&device_lock); 1653 sysctl_relock(); 1654 *oldlenp = where - start; 1655 return error; 1656 } 1657 1658 static int 1659 sysctl_security_setidcore(SYSCTLFN_ARGS) 1660 { 1661 int newsize, error; 1662 struct sysctlnode node; 1663 1664 node = *rnode; 1665 node.sysctl_data = &newsize; 1666 newsize = *(int *)rnode->sysctl_data; 1667 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1668 if (error || newp == NULL) 1669 return error; 1670 1671 if (kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_SETIDCORE, 1672 0, NULL, NULL, NULL)) 1673 return (EPERM); 1674 1675 *(int *)rnode->sysctl_data = newsize; 1676 1677 return 0; 1678 } 1679 1680 static int 1681 sysctl_security_setidcorename(SYSCTLFN_ARGS) 1682 { 1683 int error; 1684 char *newsetidcorename; 1685 struct sysctlnode node; 1686 1687 newsetidcorename = PNBUF_GET(); 1688 node = *rnode; 1689 node.sysctl_data = newsetidcorename; 1690 memcpy(node.sysctl_data, rnode->sysctl_data, MAXPATHLEN); 1691 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1692 if (error || newp == NULL) { 1693 goto out; 1694 } 1695 if (kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_SETIDCORE, 1696 0, NULL, NULL, NULL)) { 1697 error = EPERM; 1698 goto out; 1699 } 1700 if (strlen(newsetidcorename) == 0) { 1701 error = EINVAL; 1702 goto out; 1703 } 1704 memcpy(rnode->sysctl_data, node.sysctl_data, MAXPATHLEN); 1705 out: 1706 PNBUF_PUT(newsetidcorename); 1707 return error; 1708 } 1709 1710 /* 1711 * sysctl helper routine for kern.cp_id node. Maps cpus to their 1712 * cpuids. 1713 */ 1714 static int 1715 sysctl_kern_cpid(SYSCTLFN_ARGS) 1716 { 1717 struct sysctlnode node = *rnode; 1718 uint64_t *cp_id = NULL; 1719 int error, n = ncpu; 1720 struct cpu_info *ci; 1721 CPU_INFO_ITERATOR cii; 1722 1723 /* 1724 * Here you may either retrieve a single cpu id or the whole 1725 * set. The size you get back when probing depends on what 1726 * you ask for. 1727 */ 1728 switch (namelen) { 1729 case 0: 1730 node.sysctl_size = n * sizeof(uint64_t); 1731 n = -2; /* ALL */ 1732 break; 1733 case 1: 1734 if (name[0] < 0 || name[0] >= n) 1735 return (ENOENT); /* ENOSUCHPROCESSOR */ 1736 node.sysctl_size = sizeof(uint64_t); 1737 n = name[0]; 1738 /* 1739 * adjust these so that sysctl_lookup() will be happy 1740 */ 1741 name++; 1742 namelen--; 1743 break; 1744 default: 1745 return (EINVAL); 1746 } 1747 1748 cp_id = kmem_alloc(node.sysctl_size, KM_SLEEP); 1749 if (cp_id == NULL) 1750 return (ENOMEM); 1751 node.sysctl_data = cp_id; 1752 memset(cp_id, 0, node.sysctl_size); 1753 1754 for (CPU_INFO_FOREACH(cii, ci)) { 1755 if (n <= 0) 1756 cp_id[0] = cpu_index(ci); 1757 /* 1758 * if a specific processor was requested and we just 1759 * did it, we're done here 1760 */ 1761 if (n == 0) 1762 break; 1763 /* 1764 * if doing "all", skip to next cp_id slot for next processor 1765 */ 1766 if (n == -2) 1767 cp_id++; 1768 /* 1769 * if we're doing a specific processor, we're one 1770 * processor closer 1771 */ 1772 if (n > 0) 1773 n--; 1774 } 1775 1776 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1777 kmem_free(node.sysctl_data, node.sysctl_size); 1778 return (error); 1779 } 1780 1781 /* 1782 * sysctl helper routine for hw.usermem and hw.usermem64. Values are 1783 * calculate on the fly taking into account integer overflow and the 1784 * current wired count. 1785 */ 1786 static int 1787 sysctl_hw_usermem(SYSCTLFN_ARGS) 1788 { 1789 u_int ui; 1790 u_quad_t uq; 1791 struct sysctlnode node; 1792 1793 node = *rnode; 1794 switch (rnode->sysctl_num) { 1795 case HW_USERMEM: 1796 if ((ui = physmem - uvmexp.wired) > (UINT_MAX / PAGE_SIZE)) 1797 ui = UINT_MAX; 1798 else 1799 ui *= PAGE_SIZE; 1800 node.sysctl_data = &ui; 1801 break; 1802 case HW_USERMEM64: 1803 uq = (u_quad_t)(physmem - uvmexp.wired) * PAGE_SIZE; 1804 node.sysctl_data = &uq; 1805 break; 1806 default: 1807 return (EINVAL); 1808 } 1809 1810 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 1811 } 1812 1813 /* 1814 * sysctl helper routine for kern.cnmagic node. Pulls the old value 1815 * out, encoded, and stuffs the new value in for decoding. 1816 */ 1817 static int 1818 sysctl_hw_cnmagic(SYSCTLFN_ARGS) 1819 { 1820 char magic[CNS_LEN]; 1821 int error; 1822 struct sysctlnode node; 1823 1824 if (oldp) 1825 cn_get_magic(magic, CNS_LEN); 1826 node = *rnode; 1827 node.sysctl_data = &magic[0]; 1828 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1829 if (error || newp == NULL) 1830 return (error); 1831 1832 return (cn_set_magic(magic)); 1833 } 1834 1835 /* 1836 * ******************************************************************** 1837 * section 3: public helper routines that are used for more than one 1838 * node 1839 * ******************************************************************** 1840 */ 1841 1842 /* 1843 * sysctl helper routine for the kern.root_device node and some ports' 1844 * machdep.root_device nodes. 1845 */ 1846 int 1847 sysctl_root_device(SYSCTLFN_ARGS) 1848 { 1849 struct sysctlnode node; 1850 1851 node = *rnode; 1852 node.sysctl_data = __UNCONST(device_xname(root_device)); 1853 node.sysctl_size = strlen(device_xname(root_device)) + 1; 1854 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 1855 } 1856 1857 /* 1858 * sysctl helper routine for kern.consdev, dependent on the current 1859 * state of the console. Also used for machdep.console_device on some 1860 * ports. 1861 */ 1862 int 1863 sysctl_consdev(SYSCTLFN_ARGS) 1864 { 1865 dev_t consdev; 1866 uint32_t oconsdev; 1867 struct sysctlnode node; 1868 1869 if (cn_tab != NULL) 1870 consdev = cn_tab->cn_dev; 1871 else 1872 consdev = NODEV; 1873 node = *rnode; 1874 switch (*oldlenp) { 1875 case sizeof(consdev): 1876 node.sysctl_data = &consdev; 1877 node.sysctl_size = sizeof(consdev); 1878 break; 1879 case sizeof(oconsdev): 1880 oconsdev = (uint32_t)consdev; 1881 node.sysctl_data = &oconsdev; 1882 node.sysctl_size = sizeof(oconsdev); 1883 break; 1884 default: 1885 return EINVAL; 1886 } 1887 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 1888 } 1889 1890 /* 1891 * ******************************************************************** 1892 * section 4: support for some helpers 1893 * ******************************************************************** 1894 */ 1895 1896 1897 /* 1898 * Fill in a kinfo_lwp structure for the specified lwp. 1899 */ 1900 static void 1901 fill_lwp(struct lwp *l, struct kinfo_lwp *kl) 1902 { 1903 struct proc *p = l->l_proc; 1904 struct timeval tv; 1905 1906 KASSERT(lwp_locked(l, NULL)); 1907 1908 memset(kl, 0, sizeof(*kl)); 1909 1910 kl->l_forw = 0; 1911 kl->l_back = 0; 1912 kl->l_laddr = PTRTOUINT64(l); 1913 kl->l_addr = PTRTOUINT64(l->l_addr); 1914 kl->l_stat = l->l_stat; 1915 kl->l_lid = l->l_lid; 1916 kl->l_flag = L_INMEM; 1917 kl->l_flag |= sysctl_map_flags(sysctl_lwpprflagmap, l->l_prflag); 1918 kl->l_flag |= sysctl_map_flags(sysctl_lwpflagmap, l->l_flag); 1919 1920 kl->l_swtime = l->l_swtime; 1921 kl->l_slptime = l->l_slptime; 1922 if (l->l_stat == LSONPROC) 1923 kl->l_schedflags = l->l_cpu->ci_schedstate.spc_flags; 1924 else 1925 kl->l_schedflags = 0; 1926 kl->l_priority = lwp_eprio(l); 1927 kl->l_usrpri = l->l_priority; 1928 if (l->l_wchan) 1929 strncpy(kl->l_wmesg, l->l_wmesg, sizeof(kl->l_wmesg)); 1930 kl->l_wchan = PTRTOUINT64(l->l_wchan); 1931 kl->l_cpuid = cpu_index(l->l_cpu); 1932 bintime2timeval(&l->l_rtime, &tv); 1933 kl->l_rtime_sec = tv.tv_sec; 1934 kl->l_rtime_usec = tv.tv_usec; 1935 kl->l_cpticks = l->l_cpticks; 1936 kl->l_pctcpu = l->l_pctcpu; 1937 kl->l_pid = p->p_pid; 1938 if (l->l_name == NULL) 1939 kl->l_name[0] = '\0'; 1940 else 1941 strlcpy(kl->l_name, l->l_name, sizeof(kl->l_name)); 1942 } 1943
Indexes created Tue Sep 23 02:09:52 GMT 2025