1 /* $NetBSD: init_sysctl.c,v 1.194 2013/02/02 14:02:09 matt 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 1.194 2013/02/02 14:02:09 matt Exp $"); 34 35 #include "opt_sysv.h" 36 #include "opt_compat_netbsd.h" 37 #include "opt_modular.h" 38 #include "pty.h" 39 40 #define SYSCTL_PRIVATE 41 42 #include <sys/types.h> 43 #include <sys/param.h> 44 #include <sys/sysctl.h> 45 #include <sys/cpu.h> 46 #include <sys/errno.h> 47 #include <sys/systm.h> 48 #include <sys/kernel.h> 49 #include <sys/unistd.h> 50 #include <sys/disklabel.h> 51 #include <sys/cprng.h> 52 #include <sys/vnode.h> 53 #include <sys/mount.h> 54 #include <sys/namei.h> 55 #include <sys/msgbuf.h> 56 #include <dev/cons.h> 57 #include <sys/socketvar.h> 58 #include <sys/file.h> 59 #include <sys/filedesc.h> 60 #include <sys/tty.h> 61 #include <sys/kmem.h> 62 #include <sys/resource.h> 63 #include <sys/resourcevar.h> 64 #include <sys/exec.h> 65 #include <sys/conf.h> 66 #include <sys/device.h> 67 #include <sys/stat.h> 68 #include <sys/kauth.h> 69 #include <sys/ktrace.h> 70 #include <sys/ksem.h> 71 72 #ifdef COMPAT_50 73 #include <compat/sys/time.h> 74 #endif 75 76 #include <sys/cpu.h> 77 78 int security_setidcore_dump; 79 char security_setidcore_path[MAXPATHLEN] = "/var/crash/%n.core"; 80 uid_t security_setidcore_owner = 0; 81 gid_t security_setidcore_group = 0; 82 mode_t security_setidcore_mode = (S_IRUSR|S_IWUSR); 83 84 static const u_int sysctl_flagmap[] = { 85 PK_ADVLOCK, P_ADVLOCK, 86 PK_EXEC, P_EXEC, 87 PK_NOCLDWAIT, P_NOCLDWAIT, 88 PK_32, P_32, 89 PK_CLDSIGIGN, P_CLDSIGIGN, 90 PK_SUGID, P_SUGID, 91 0 92 }; 93 94 static const u_int sysctl_sflagmap[] = { 95 PS_NOCLDSTOP, P_NOCLDSTOP, 96 PS_WEXIT, P_WEXIT, 97 PS_STOPFORK, P_STOPFORK, 98 PS_STOPEXEC, P_STOPEXEC, 99 PS_STOPEXIT, P_STOPEXIT, 100 0 101 }; 102 103 static const u_int sysctl_slflagmap[] = { 104 PSL_TRACED, P_TRACED, 105 PSL_FSTRACE, P_FSTRACE, 106 PSL_CHTRACED, P_CHTRACED, 107 PSL_SYSCALL, P_SYSCALL, 108 0 109 }; 110 111 static const u_int sysctl_lflagmap[] = { 112 PL_CONTROLT, P_CONTROLT, 113 PL_PPWAIT, P_PPWAIT, 114 0 115 }; 116 117 static const u_int sysctl_stflagmap[] = { 118 PST_PROFIL, P_PROFIL, 119 0 120 121 }; 122 123 static const u_int sysctl_lwpprflagmap[] = { 124 LPR_DETACHED, L_DETACHED, 125 0 126 }; 127 128 /* 129 * try over estimating by 5 procs/lwps 130 */ 131 #define KERN_LWPSLOP (5 * sizeof(struct kinfo_lwp)) 132 133 static int dcopyout(struct lwp *, const void *, void *, size_t); 134 135 static int 136 dcopyout(struct lwp *l, const void *kaddr, void *uaddr, size_t len) 137 { 138 int error; 139 140 error = copyout(kaddr, uaddr, len); 141 ktrmibio(-1, UIO_READ, uaddr, len, error); 142 143 return error; 144 } 145 146 #ifdef DIAGNOSTIC 147 static int sysctl_kern_trigger_panic(SYSCTLFN_PROTO); 148 #endif 149 static int sysctl_kern_maxvnodes(SYSCTLFN_PROTO); 150 static int sysctl_kern_rtc_offset(SYSCTLFN_PROTO); 151 static int sysctl_kern_maxproc(SYSCTLFN_PROTO); 152 static int sysctl_kern_hostid(SYSCTLFN_PROTO); 153 static int sysctl_setlen(SYSCTLFN_PROTO); 154 static int sysctl_kern_clockrate(SYSCTLFN_PROTO); 155 static int sysctl_msgbuf(SYSCTLFN_PROTO); 156 static int sysctl_kern_defcorename(SYSCTLFN_PROTO); 157 static int sysctl_kern_cptime(SYSCTLFN_PROTO); 158 #if NPTY > 0 159 static int sysctl_kern_maxptys(SYSCTLFN_PROTO); 160 #endif /* NPTY > 0 */ 161 static int sysctl_kern_urnd(SYSCTLFN_PROTO); 162 static int sysctl_kern_arnd(SYSCTLFN_PROTO); 163 static int sysctl_kern_lwp(SYSCTLFN_PROTO); 164 static int sysctl_kern_forkfsleep(SYSCTLFN_PROTO); 165 static int sysctl_kern_root_partition(SYSCTLFN_PROTO); 166 static int sysctl_kern_drivers(SYSCTLFN_PROTO); 167 static int sysctl_security_setidcore(SYSCTLFN_PROTO); 168 static int sysctl_security_setidcorename(SYSCTLFN_PROTO); 169 static int sysctl_kern_cpid(SYSCTLFN_PROTO); 170 static int sysctl_hw_usermem(SYSCTLFN_PROTO); 171 static int sysctl_hw_cnmagic(SYSCTLFN_PROTO); 172 173 static void fill_lwp(struct lwp *l, struct kinfo_lwp *kl); 174 175 /* 176 * ******************************************************************** 177 * section 1: setup routines 178 * ******************************************************************** 179 * These functions are stuffed into a link set for sysctl setup 180 * functions. They're never called or referenced from anywhere else. 181 * ******************************************************************** 182 */ 183 184 /* 185 * this setup routine is a replacement for kern_sysctl() 186 */ 187 SYSCTL_SETUP(sysctl_kern_setup, "sysctl kern subtree setup") 188 { 189 extern int kern_logsigexit; /* defined in kern/kern_sig.c */ 190 extern fixpt_t ccpu; /* defined in kern/kern_synch.c */ 191 extern int dumponpanic; /* defined in kern/subr_prf.c */ 192 const struct sysctlnode *rnode; 193 194 sysctl_createv(clog, 0, NULL, NULL, 195 CTLFLAG_PERMANENT, 196 CTLTYPE_NODE, "kern", NULL, 197 NULL, 0, NULL, 0, 198 CTL_KERN, CTL_EOL); 199 200 sysctl_createv(clog, 0, NULL, NULL, 201 CTLFLAG_PERMANENT, 202 CTLTYPE_STRING, "ostype", 203 SYSCTL_DESCR("Operating system type"), 204 NULL, 0, __UNCONST(&ostype), 0, 205 CTL_KERN, KERN_OSTYPE, CTL_EOL); 206 sysctl_createv(clog, 0, NULL, NULL, 207 CTLFLAG_PERMANENT, 208 CTLTYPE_STRING, "osrelease", 209 SYSCTL_DESCR("Operating system release"), 210 NULL, 0, __UNCONST(&osrelease), 0, 211 CTL_KERN, KERN_OSRELEASE, CTL_EOL); 212 sysctl_createv(clog, 0, NULL, NULL, 213 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 214 CTLTYPE_INT, "osrevision", 215 SYSCTL_DESCR("Operating system revision"), 216 NULL, __NetBSD_Version__, NULL, 0, 217 CTL_KERN, KERN_OSREV, CTL_EOL); 218 sysctl_createv(clog, 0, NULL, NULL, 219 CTLFLAG_PERMANENT, 220 CTLTYPE_STRING, "version", 221 SYSCTL_DESCR("Kernel version"), 222 NULL, 0, __UNCONST(&version), 0, 223 CTL_KERN, KERN_VERSION, CTL_EOL); 224 sysctl_createv(clog, 0, NULL, NULL, 225 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 226 CTLTYPE_INT, "maxvnodes", 227 SYSCTL_DESCR("Maximum number of vnodes"), 228 sysctl_kern_maxvnodes, 0, NULL, 0, 229 CTL_KERN, KERN_MAXVNODES, CTL_EOL); 230 sysctl_createv(clog, 0, NULL, NULL, 231 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 232 CTLTYPE_INT, "maxproc", 233 SYSCTL_DESCR("Maximum number of simultaneous processes"), 234 sysctl_kern_maxproc, 0, NULL, 0, 235 CTL_KERN, KERN_MAXPROC, CTL_EOL); 236 sysctl_createv(clog, 0, NULL, NULL, 237 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 238 CTLTYPE_INT, "maxfiles", 239 SYSCTL_DESCR("Maximum number of open files"), 240 NULL, 0, &maxfiles, 0, 241 CTL_KERN, KERN_MAXFILES, CTL_EOL); 242 sysctl_createv(clog, 0, NULL, NULL, 243 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 244 CTLTYPE_INT, "argmax", 245 SYSCTL_DESCR("Maximum number of bytes of arguments to " 246 "execve(2)"), 247 NULL, ARG_MAX, NULL, 0, 248 CTL_KERN, KERN_ARGMAX, CTL_EOL); 249 sysctl_createv(clog, 0, NULL, NULL, 250 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 251 CTLTYPE_STRING, "hostname", 252 SYSCTL_DESCR("System hostname"), 253 sysctl_setlen, 0, hostname, MAXHOSTNAMELEN, 254 CTL_KERN, KERN_HOSTNAME, CTL_EOL); 255 sysctl_createv(clog, 0, NULL, NULL, 256 CTLFLAG_PERMANENT|CTLFLAG_READWRITE|CTLFLAG_HEX, 257 CTLTYPE_INT, "hostid", 258 SYSCTL_DESCR("System host ID number"), 259 sysctl_kern_hostid, 0, NULL, 0, 260 CTL_KERN, KERN_HOSTID, CTL_EOL); 261 sysctl_createv(clog, 0, NULL, NULL, 262 CTLFLAG_PERMANENT, 263 CTLTYPE_STRUCT, "clockrate", 264 SYSCTL_DESCR("Kernel clock rates"), 265 sysctl_kern_clockrate, 0, NULL, 266 sizeof(struct clockinfo), 267 CTL_KERN, KERN_CLOCKRATE, CTL_EOL); 268 sysctl_createv(clog, 0, NULL, NULL, 269 CTLFLAG_PERMANENT, 270 CTLTYPE_INT, "hardclock_ticks", 271 SYSCTL_DESCR("Number of hardclock ticks"), 272 NULL, 0, &hardclock_ticks, sizeof(hardclock_ticks), 273 CTL_KERN, KERN_HARDCLOCK_TICKS, CTL_EOL); 274 sysctl_createv(clog, 0, NULL, NULL, 275 CTLFLAG_PERMANENT, 276 CTLTYPE_STRUCT, "vnode", 277 SYSCTL_DESCR("System vnode table"), 278 sysctl_kern_vnode, 0, NULL, 0, 279 CTL_KERN, KERN_VNODE, CTL_EOL); 280 #ifndef GPROF 281 sysctl_createv(clog, 0, NULL, NULL, 282 CTLFLAG_PERMANENT, 283 CTLTYPE_NODE, "profiling", 284 SYSCTL_DESCR("Profiling information (not available)"), 285 sysctl_notavail, 0, NULL, 0, 286 CTL_KERN, KERN_PROF, CTL_EOL); 287 #endif 288 sysctl_createv(clog, 0, NULL, NULL, 289 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 290 CTLTYPE_INT, "posix1version", 291 SYSCTL_DESCR("Version of ISO/IEC 9945 (POSIX 1003.1) " 292 "with which the operating system attempts " 293 "to comply"), 294 NULL, _POSIX_VERSION, NULL, 0, 295 CTL_KERN, KERN_POSIX1, CTL_EOL); 296 sysctl_createv(clog, 0, NULL, NULL, 297 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 298 CTLTYPE_INT, "ngroups", 299 SYSCTL_DESCR("Maximum number of supplemental groups"), 300 NULL, NGROUPS_MAX, NULL, 0, 301 CTL_KERN, KERN_NGROUPS, CTL_EOL); 302 sysctl_createv(clog, 0, NULL, NULL, 303 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 304 CTLTYPE_INT, "job_control", 305 SYSCTL_DESCR("Whether job control is available"), 306 NULL, 1, NULL, 0, 307 CTL_KERN, KERN_JOB_CONTROL, CTL_EOL); 308 sysctl_createv(clog, 0, NULL, NULL, 309 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 310 CTLTYPE_INT, "saved_ids", 311 SYSCTL_DESCR("Whether POSIX saved set-group/user ID is " 312 "available"), NULL, 313 #ifdef _POSIX_SAVED_IDS 314 1, 315 #else /* _POSIX_SAVED_IDS */ 316 0, 317 #endif /* _POSIX_SAVED_IDS */ 318 NULL, 0, CTL_KERN, KERN_SAVED_IDS, CTL_EOL); 319 sysctl_createv(clog, 0, NULL, NULL, 320 CTLFLAG_PERMANENT|CTLFLAG_HEX, 321 CTLTYPE_INT, "boothowto", 322 SYSCTL_DESCR("Flags from boot loader"), 323 NULL, 0, &boothowto, sizeof(boothowto), 324 CTL_KERN, CTL_CREATE, CTL_EOL); 325 sysctl_createv(clog, 0, NULL, NULL, 326 CTLFLAG_PERMANENT, 327 CTLTYPE_STRUCT, "boottime", 328 SYSCTL_DESCR("System boot time"), 329 NULL, 0, &boottime, sizeof(boottime), 330 CTL_KERN, KERN_BOOTTIME, CTL_EOL); 331 #ifdef COMPAT_50 332 { 333 extern struct timeval50 boottime50; 334 sysctl_createv(clog, 0, NULL, NULL, 335 CTLFLAG_PERMANENT, 336 CTLTYPE_STRUCT, "oboottime", 337 SYSCTL_DESCR("System boot time"), 338 NULL, 0, &boottime50, sizeof(boottime50), 339 CTL_KERN, KERN_OBOOTTIME, CTL_EOL); 340 } 341 #endif 342 sysctl_createv(clog, 0, NULL, NULL, 343 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 344 CTLTYPE_STRING, "domainname", 345 SYSCTL_DESCR("YP domain name"), 346 sysctl_setlen, 0, domainname, MAXHOSTNAMELEN, 347 CTL_KERN, KERN_DOMAINNAME, CTL_EOL); 348 sysctl_createv(clog, 0, NULL, NULL, 349 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 350 CTLTYPE_INT, "maxpartitions", 351 SYSCTL_DESCR("Maximum number of partitions allowed per " 352 "disk"), 353 NULL, MAXPARTITIONS, NULL, 0, 354 CTL_KERN, KERN_MAXPARTITIONS, CTL_EOL); 355 sysctl_createv(clog, 0, NULL, NULL, 356 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 357 CTLTYPE_INT, "rawpartition", 358 SYSCTL_DESCR("Raw partition of a disk"), 359 NULL, RAW_PART, NULL, 0, 360 CTL_KERN, KERN_RAWPARTITION, CTL_EOL); 361 sysctl_createv(clog, 0, NULL, NULL, 362 CTLFLAG_PERMANENT, 363 CTLTYPE_STRUCT, "timex", NULL, 364 sysctl_notavail, 0, NULL, 0, 365 CTL_KERN, KERN_TIMEX, CTL_EOL); 366 sysctl_createv(clog, 0, NULL, NULL, 367 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 368 CTLTYPE_INT, "rtc_offset", 369 SYSCTL_DESCR("Offset of real time clock from UTC in " 370 "minutes"), 371 sysctl_kern_rtc_offset, 0, &rtc_offset, 0, 372 CTL_KERN, KERN_RTC_OFFSET, CTL_EOL); 373 sysctl_createv(clog, 0, NULL, NULL, 374 CTLFLAG_PERMANENT, 375 CTLTYPE_STRING, "root_device", 376 SYSCTL_DESCR("Name of the root device"), 377 sysctl_root_device, 0, NULL, 0, 378 CTL_KERN, KERN_ROOT_DEVICE, CTL_EOL); 379 sysctl_createv(clog, 0, NULL, NULL, 380 CTLFLAG_PERMANENT, 381 CTLTYPE_INT, "msgbufsize", 382 SYSCTL_DESCR("Size of the kernel message buffer"), 383 sysctl_msgbuf, 0, NULL, 0, 384 CTL_KERN, KERN_MSGBUFSIZE, CTL_EOL); 385 sysctl_createv(clog, 0, NULL, NULL, 386 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 387 CTLTYPE_INT, "fsync", 388 SYSCTL_DESCR("Whether the POSIX 1003.1b File " 389 "Synchronization Option is available on " 390 "this system"), 391 NULL, 1, NULL, 0, 392 CTL_KERN, KERN_FSYNC, CTL_EOL); 393 sysctl_createv(clog, 0, NULL, NULL, 394 CTLFLAG_PERMANENT, 395 CTLTYPE_NODE, "ipc", 396 SYSCTL_DESCR("SysV IPC options"), 397 NULL, 0, NULL, 0, 398 CTL_KERN, KERN_SYSVIPC, CTL_EOL); 399 sysctl_createv(clog, 0, NULL, NULL, 400 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 401 CTLTYPE_INT, "sysvmsg", 402 SYSCTL_DESCR("System V style message support available"), 403 NULL, 404 #ifdef SYSVMSG 405 1, 406 #else /* SYSVMSG */ 407 0, 408 #endif /* SYSVMSG */ 409 NULL, 0, CTL_KERN, KERN_SYSVIPC, KERN_SYSVIPC_MSG, CTL_EOL); 410 sysctl_createv(clog, 0, NULL, NULL, 411 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 412 CTLTYPE_INT, "sysvsem", 413 SYSCTL_DESCR("System V style semaphore support " 414 "available"), NULL, 415 #ifdef SYSVSEM 416 1, 417 #else /* SYSVSEM */ 418 0, 419 #endif /* SYSVSEM */ 420 NULL, 0, CTL_KERN, KERN_SYSVIPC, KERN_SYSVIPC_SEM, CTL_EOL); 421 sysctl_createv(clog, 0, NULL, NULL, 422 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 423 CTLTYPE_INT, "sysvshm", 424 SYSCTL_DESCR("System V style shared memory support " 425 "available"), NULL, 426 #ifdef SYSVSHM 427 1, 428 #else /* SYSVSHM */ 429 0, 430 #endif /* SYSVSHM */ 431 NULL, 0, CTL_KERN, KERN_SYSVIPC, KERN_SYSVIPC_SHM, CTL_EOL); 432 sysctl_createv(clog, 0, NULL, NULL, 433 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 434 CTLTYPE_INT, "synchronized_io", 435 SYSCTL_DESCR("Whether the POSIX 1003.1b Synchronized " 436 "I/O Option is available on this system"), 437 NULL, 1, NULL, 0, 438 CTL_KERN, KERN_SYNCHRONIZED_IO, CTL_EOL); 439 sysctl_createv(clog, 0, NULL, NULL, 440 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 441 CTLTYPE_INT, "iov_max", 442 SYSCTL_DESCR("Maximum number of iovec structures per " 443 "process"), 444 NULL, IOV_MAX, NULL, 0, 445 CTL_KERN, KERN_IOV_MAX, CTL_EOL); 446 sysctl_createv(clog, 0, NULL, NULL, 447 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 448 CTLTYPE_INT, "mapped_files", 449 SYSCTL_DESCR("Whether the POSIX 1003.1b Memory Mapped " 450 "Files Option is available on this system"), 451 NULL, 1, NULL, 0, 452 CTL_KERN, KERN_MAPPED_FILES, CTL_EOL); 453 sysctl_createv(clog, 0, NULL, NULL, 454 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 455 CTLTYPE_INT, "memlock", 456 SYSCTL_DESCR("Whether the POSIX 1003.1b Process Memory " 457 "Locking Option is available on this " 458 "system"), 459 NULL, 1, NULL, 0, 460 CTL_KERN, KERN_MEMLOCK, CTL_EOL); 461 sysctl_createv(clog, 0, NULL, NULL, 462 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 463 CTLTYPE_INT, "memlock_range", 464 SYSCTL_DESCR("Whether the POSIX 1003.1b Range Memory " 465 "Locking Option is available on this " 466 "system"), 467 NULL, 1, NULL, 0, 468 CTL_KERN, KERN_MEMLOCK_RANGE, CTL_EOL); 469 sysctl_createv(clog, 0, NULL, NULL, 470 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 471 CTLTYPE_INT, "memory_protection", 472 SYSCTL_DESCR("Whether the POSIX 1003.1b Memory " 473 "Protection Option is available on this " 474 "system"), 475 NULL, 1, NULL, 0, 476 CTL_KERN, KERN_MEMORY_PROTECTION, CTL_EOL); 477 sysctl_createv(clog, 0, NULL, NULL, 478 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 479 CTLTYPE_INT, "login_name_max", 480 SYSCTL_DESCR("Maximum login name length"), 481 NULL, LOGIN_NAME_MAX, NULL, 0, 482 CTL_KERN, KERN_LOGIN_NAME_MAX, CTL_EOL); 483 sysctl_createv(clog, 0, NULL, NULL, 484 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 485 CTLTYPE_STRING, "defcorename", 486 SYSCTL_DESCR("Default core file name"), 487 sysctl_kern_defcorename, 0, defcorename, MAXPATHLEN, 488 CTL_KERN, KERN_DEFCORENAME, CTL_EOL); 489 sysctl_createv(clog, 0, NULL, NULL, 490 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 491 CTLTYPE_INT, "logsigexit", 492 SYSCTL_DESCR("Log process exit when caused by signals"), 493 NULL, 0, &kern_logsigexit, 0, 494 CTL_KERN, KERN_LOGSIGEXIT, CTL_EOL); 495 sysctl_createv(clog, 0, NULL, NULL, 496 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 497 CTLTYPE_INT, "fscale", 498 SYSCTL_DESCR("Kernel fixed-point scale factor"), 499 NULL, FSCALE, NULL, 0, 500 CTL_KERN, KERN_FSCALE, CTL_EOL); 501 sysctl_createv(clog, 0, NULL, NULL, 502 CTLFLAG_PERMANENT, 503 CTLTYPE_INT, "ccpu", 504 SYSCTL_DESCR("Scheduler exponential decay value"), 505 NULL, 0, &ccpu, 0, 506 CTL_KERN, KERN_CCPU, CTL_EOL); 507 sysctl_createv(clog, 0, NULL, NULL, 508 CTLFLAG_PERMANENT, 509 CTLTYPE_STRUCT, "cp_time", 510 SYSCTL_DESCR("Clock ticks spent in different CPU states"), 511 sysctl_kern_cptime, 0, NULL, 0, 512 CTL_KERN, KERN_CP_TIME, CTL_EOL); 513 sysctl_createv(clog, 0, NULL, NULL, 514 CTLFLAG_PERMANENT, 515 CTLTYPE_INT, "msgbuf", 516 SYSCTL_DESCR("Kernel message buffer"), 517 sysctl_msgbuf, 0, NULL, 0, 518 CTL_KERN, KERN_MSGBUF, CTL_EOL); 519 sysctl_createv(clog, 0, NULL, NULL, 520 CTLFLAG_PERMANENT, 521 CTLTYPE_STRUCT, "consdev", 522 SYSCTL_DESCR("Console device"), 523 sysctl_consdev, 0, NULL, sizeof(dev_t), 524 CTL_KERN, KERN_CONSDEV, CTL_EOL); 525 #if NPTY > 0 526 sysctl_createv(clog, 0, NULL, NULL, 527 CTLFLAG_PERMANENT, 528 CTLTYPE_INT, "maxptys", 529 SYSCTL_DESCR("Maximum number of pseudo-ttys"), 530 sysctl_kern_maxptys, 0, NULL, 0, 531 CTL_KERN, KERN_MAXPTYS, CTL_EOL); 532 #endif /* NPTY > 0 */ 533 sysctl_createv(clog, 0, NULL, NULL, 534 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 535 CTLTYPE_INT, "maxphys", 536 SYSCTL_DESCR("Maximum raw I/O transfer size"), 537 NULL, MAXPHYS, NULL, 0, 538 CTL_KERN, KERN_MAXPHYS, CTL_EOL); 539 sysctl_createv(clog, 0, NULL, NULL, 540 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 541 CTLTYPE_INT, "monotonic_clock", 542 SYSCTL_DESCR("Implementation version of the POSIX " 543 "1003.1b Monotonic Clock Option"), 544 /* XXX _POSIX_VERSION */ 545 NULL, _POSIX_MONOTONIC_CLOCK, NULL, 0, 546 CTL_KERN, KERN_MONOTONIC_CLOCK, CTL_EOL); 547 sysctl_createv(clog, 0, NULL, NULL, 548 CTLFLAG_PERMANENT, 549 CTLTYPE_INT, "urandom", 550 SYSCTL_DESCR("Random integer value"), 551 sysctl_kern_urnd, 0, NULL, 0, 552 CTL_KERN, KERN_URND, CTL_EOL); 553 sysctl_createv(clog, 0, NULL, NULL, 554 CTLFLAG_PERMANENT, 555 CTLTYPE_INT, "arandom", 556 SYSCTL_DESCR("n bytes of random data"), 557 sysctl_kern_arnd, 0, NULL, 0, 558 CTL_KERN, KERN_ARND, CTL_EOL); 559 sysctl_createv(clog, 0, NULL, NULL, 560 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 561 CTLTYPE_INT, "labelsector", 562 SYSCTL_DESCR("Sector number containing the disklabel"), 563 NULL, LABELSECTOR, NULL, 0, 564 CTL_KERN, KERN_LABELSECTOR, CTL_EOL); 565 sysctl_createv(clog, 0, NULL, NULL, 566 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 567 CTLTYPE_INT, "labeloffset", 568 SYSCTL_DESCR("Offset of the disklabel within the " 569 "sector"), 570 NULL, LABELOFFSET, NULL, 0, 571 CTL_KERN, KERN_LABELOFFSET, CTL_EOL); 572 sysctl_createv(clog, 0, NULL, NULL, 573 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 574 CTLTYPE_INT, "labelusesmbr", 575 SYSCTL_DESCR("disklabel is inside MBR partition"), 576 NULL, LABELUSESMBR, NULL, 0, 577 CTL_KERN, CTL_CREATE, CTL_EOL); 578 sysctl_createv(clog, 0, NULL, NULL, 579 CTLFLAG_PERMANENT, 580 CTLTYPE_NODE, "lwp", 581 SYSCTL_DESCR("System-wide LWP information"), 582 sysctl_kern_lwp, 0, NULL, 0, 583 CTL_KERN, KERN_LWP, CTL_EOL); 584 sysctl_createv(clog, 0, NULL, NULL, 585 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 586 CTLTYPE_INT, "forkfsleep", 587 SYSCTL_DESCR("Milliseconds to sleep on fork failure due " 588 "to process limits"), 589 sysctl_kern_forkfsleep, 0, NULL, 0, 590 CTL_KERN, KERN_FORKFSLEEP, CTL_EOL); 591 sysctl_createv(clog, 0, NULL, NULL, 592 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 593 CTLTYPE_INT, "posix_threads", 594 SYSCTL_DESCR("Version of IEEE Std 1003.1 and its " 595 "Threads option to which the system " 596 "attempts to conform"), 597 /* XXX _POSIX_VERSION */ 598 NULL, _POSIX_THREADS, NULL, 0, 599 CTL_KERN, KERN_POSIX_THREADS, CTL_EOL); 600 sysctl_createv(clog, 0, NULL, NULL, 601 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 602 CTLTYPE_INT, "posix_semaphores", 603 SYSCTL_DESCR("Version of IEEE Std 1003.1 and its " 604 "Semaphores option to which the system " 605 "attempts to conform"), NULL, 606 200112, NULL, 0, 607 CTL_KERN, KERN_POSIX_SEMAPHORES, CTL_EOL); 608 sysctl_createv(clog, 0, NULL, NULL, 609 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 610 CTLTYPE_INT, "posix_barriers", 611 SYSCTL_DESCR("Version of IEEE Std 1003.1 and its " 612 "Barriers option to which the system " 613 "attempts to conform"), 614 /* XXX _POSIX_VERSION */ 615 NULL, _POSIX_BARRIERS, NULL, 0, 616 CTL_KERN, KERN_POSIX_BARRIERS, CTL_EOL); 617 sysctl_createv(clog, 0, NULL, NULL, 618 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 619 CTLTYPE_INT, "posix_timers", 620 SYSCTL_DESCR("Version of IEEE Std 1003.1 and its " 621 "Timers option to which the system " 622 "attempts to conform"), 623 /* XXX _POSIX_VERSION */ 624 NULL, _POSIX_TIMERS, NULL, 0, 625 CTL_KERN, KERN_POSIX_TIMERS, CTL_EOL); 626 sysctl_createv(clog, 0, NULL, NULL, 627 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 628 CTLTYPE_INT, "posix_spin_locks", 629 SYSCTL_DESCR("Version of IEEE Std 1003.1 and its Spin " 630 "Locks option to which the system attempts " 631 "to conform"), 632 /* XXX _POSIX_VERSION */ 633 NULL, _POSIX_SPIN_LOCKS, NULL, 0, 634 CTL_KERN, KERN_POSIX_SPIN_LOCKS, CTL_EOL); 635 sysctl_createv(clog, 0, NULL, NULL, 636 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 637 CTLTYPE_INT, "posix_reader_writer_locks", 638 SYSCTL_DESCR("Version of IEEE Std 1003.1 and its " 639 "Read-Write Locks option to which the " 640 "system attempts to conform"), 641 /* XXX _POSIX_VERSION */ 642 NULL, _POSIX_READER_WRITER_LOCKS, NULL, 0, 643 CTL_KERN, KERN_POSIX_READER_WRITER_LOCKS, CTL_EOL); 644 sysctl_createv(clog, 0, NULL, NULL, 645 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 646 CTLTYPE_INT, "dump_on_panic", 647 SYSCTL_DESCR("Perform a crash dump on system panic"), 648 NULL, 0, &dumponpanic, 0, 649 CTL_KERN, KERN_DUMP_ON_PANIC, CTL_EOL); 650 #ifdef DIAGNOSTIC 651 sysctl_createv(clog, 0, NULL, NULL, 652 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 653 CTLTYPE_INT, "panic_now", 654 SYSCTL_DESCR("Trigger a panic"), 655 sysctl_kern_trigger_panic, 0, NULL, 0, 656 CTL_KERN, CTL_CREATE, CTL_EOL); 657 #endif 658 sysctl_createv(clog, 0, NULL, NULL, 659 CTLFLAG_PERMANENT, 660 CTLTYPE_INT, "root_partition", 661 SYSCTL_DESCR("Root partition on the root device"), 662 sysctl_kern_root_partition, 0, NULL, 0, 663 CTL_KERN, KERN_ROOT_PARTITION, CTL_EOL); 664 sysctl_createv(clog, 0, NULL, NULL, 665 CTLFLAG_PERMANENT, 666 CTLTYPE_STRUCT, "drivers", 667 SYSCTL_DESCR("List of all drivers with block and " 668 "character device numbers"), 669 sysctl_kern_drivers, 0, NULL, 0, 670 CTL_KERN, KERN_DRIVERS, CTL_EOL); 671 sysctl_createv(clog, 0, NULL, NULL, 672 CTLFLAG_PERMANENT, 673 CTLTYPE_STRUCT, "cp_id", 674 SYSCTL_DESCR("Mapping of CPU number to CPU id"), 675 sysctl_kern_cpid, 0, NULL, 0, 676 CTL_KERN, KERN_CP_ID, CTL_EOL); 677 sysctl_createv(clog, 0, NULL, &rnode, 678 CTLFLAG_PERMANENT, 679 CTLTYPE_NODE, "coredump", 680 SYSCTL_DESCR("Coredump settings."), 681 NULL, 0, NULL, 0, 682 CTL_KERN, CTL_CREATE, CTL_EOL); 683 sysctl_createv(clog, 0, &rnode, &rnode, 684 CTLFLAG_PERMANENT, 685 CTLTYPE_NODE, "setid", 686 SYSCTL_DESCR("Set-id processes' coredump settings."), 687 NULL, 0, NULL, 0, 688 CTL_CREATE, CTL_EOL); 689 sysctl_createv(clog, 0, &rnode, NULL, 690 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 691 CTLTYPE_INT, "dump", 692 SYSCTL_DESCR("Allow set-id processes to dump core."), 693 sysctl_security_setidcore, 0, &security_setidcore_dump, 694 sizeof(security_setidcore_dump), 695 CTL_CREATE, CTL_EOL); 696 sysctl_createv(clog, 0, &rnode, NULL, 697 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 698 CTLTYPE_STRING, "path", 699 SYSCTL_DESCR("Path pattern for set-id coredumps."), 700 sysctl_security_setidcorename, 0, 701 security_setidcore_path, 702 sizeof(security_setidcore_path), 703 CTL_CREATE, CTL_EOL); 704 sysctl_createv(clog, 0, &rnode, NULL, 705 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 706 CTLTYPE_INT, "owner", 707 SYSCTL_DESCR("Owner id for set-id processes' cores."), 708 sysctl_security_setidcore, 0, &security_setidcore_owner, 709 0, 710 CTL_CREATE, CTL_EOL); 711 sysctl_createv(clog, 0, &rnode, NULL, 712 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 713 CTLTYPE_INT, "group", 714 SYSCTL_DESCR("Group id for set-id processes' cores."), 715 sysctl_security_setidcore, 0, &security_setidcore_group, 716 0, 717 CTL_CREATE, CTL_EOL); 718 sysctl_createv(clog, 0, &rnode, NULL, 719 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 720 CTLTYPE_INT, "mode", 721 SYSCTL_DESCR("Mode for set-id processes' cores."), 722 sysctl_security_setidcore, 0, &security_setidcore_mode, 723 0, 724 CTL_CREATE, CTL_EOL); 725 sysctl_createv(clog, 0, NULL, NULL, 726 CTLFLAG_IMMEDIATE|CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 727 CTLTYPE_INT, "no_sa_support", 728 SYSCTL_DESCR("0 if the kernel supports SA, otherwise " 729 "it doesn't"), 730 NULL, 1, NULL, 0, 731 CTL_KERN, CTL_CREATE, CTL_EOL); 732 /* kern.posix. */ 733 sysctl_createv(clog, 0, NULL, &rnode, 734 CTLFLAG_PERMANENT, 735 CTLTYPE_NODE, "posix", 736 SYSCTL_DESCR("POSIX options"), 737 NULL, 0, NULL, 0, 738 CTL_KERN, CTL_CREATE, CTL_EOL); 739 sysctl_createv(clog, 0, &rnode, NULL, 740 CTLFLAG_PERMANENT | CTLFLAG_READWRITE, 741 CTLTYPE_INT, "semmax", 742 SYSCTL_DESCR("Maximal number of semaphores"), 743 NULL, 0, &ksem_max, 0, 744 CTL_CREATE, CTL_EOL); 745 } 746 747 SYSCTL_SETUP(sysctl_hw_setup, "sysctl hw subtree setup") 748 { 749 u_int u; 750 u_quad_t q; 751 752 sysctl_createv(clog, 0, NULL, NULL, 753 CTLFLAG_PERMANENT, 754 CTLTYPE_NODE, "hw", NULL, 755 NULL, 0, NULL, 0, 756 CTL_HW, CTL_EOL); 757 758 sysctl_createv(clog, 0, NULL, NULL, 759 CTLFLAG_PERMANENT, 760 CTLTYPE_STRING, "machine", 761 SYSCTL_DESCR("Machine class"), 762 NULL, 0, machine, 0, 763 CTL_HW, HW_MACHINE, CTL_EOL); 764 sysctl_createv(clog, 0, NULL, NULL, 765 CTLFLAG_PERMANENT, 766 CTLTYPE_STRING, "model", 767 SYSCTL_DESCR("Machine model"), 768 NULL, 0, cpu_model, 0, 769 CTL_HW, HW_MODEL, CTL_EOL); 770 sysctl_createv(clog, 0, NULL, NULL, 771 CTLFLAG_PERMANENT, 772 CTLTYPE_INT, "ncpu", 773 SYSCTL_DESCR("Number of CPUs configured"), 774 NULL, 0, &ncpu, 0, 775 CTL_HW, HW_NCPU, CTL_EOL); 776 sysctl_createv(clog, 0, NULL, NULL, 777 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 778 CTLTYPE_INT, "byteorder", 779 SYSCTL_DESCR("System byte order"), 780 NULL, BYTE_ORDER, NULL, 0, 781 CTL_HW, HW_BYTEORDER, CTL_EOL); 782 u = ((u_int)physmem > (UINT_MAX / PAGE_SIZE)) ? 783 UINT_MAX : physmem * PAGE_SIZE; 784 sysctl_createv(clog, 0, NULL, NULL, 785 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 786 CTLTYPE_INT, "physmem", 787 SYSCTL_DESCR("Bytes of physical memory"), 788 NULL, u, NULL, 0, 789 CTL_HW, HW_PHYSMEM, CTL_EOL); 790 sysctl_createv(clog, 0, NULL, NULL, 791 CTLFLAG_PERMANENT, 792 CTLTYPE_INT, "usermem", 793 SYSCTL_DESCR("Bytes of non-kernel memory"), 794 sysctl_hw_usermem, 0, NULL, 0, 795 CTL_HW, HW_USERMEM, CTL_EOL); 796 sysctl_createv(clog, 0, NULL, NULL, 797 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 798 CTLTYPE_INT, "pagesize", 799 SYSCTL_DESCR("Software page size"), 800 NULL, PAGE_SIZE, NULL, 0, 801 CTL_HW, HW_PAGESIZE, CTL_EOL); 802 sysctl_createv(clog, 0, NULL, NULL, 803 CTLFLAG_PERMANENT, 804 CTLTYPE_STRING, "machine_arch", 805 SYSCTL_DESCR("Machine CPU class"), 806 NULL, 0, machine_arch, 0, 807 CTL_HW, HW_MACHINE_ARCH, CTL_EOL); 808 sysctl_createv(clog, 0, NULL, NULL, 809 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 810 CTLTYPE_INT, "alignbytes", 811 SYSCTL_DESCR("Alignment constraint for all possible " 812 "data types"), 813 NULL, ALIGNBYTES, NULL, 0, 814 CTL_HW, HW_ALIGNBYTES, CTL_EOL); 815 sysctl_createv(clog, 0, NULL, NULL, 816 CTLFLAG_PERMANENT|CTLFLAG_READWRITE|CTLFLAG_HEX, 817 CTLTYPE_STRING, "cnmagic", 818 SYSCTL_DESCR("Console magic key sequence"), 819 sysctl_hw_cnmagic, 0, NULL, CNS_LEN, 820 CTL_HW, HW_CNMAGIC, CTL_EOL); 821 q = (u_quad_t)physmem * PAGE_SIZE; 822 sysctl_createv(clog, 0, NULL, NULL, 823 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 824 CTLTYPE_QUAD, "physmem64", 825 SYSCTL_DESCR("Bytes of physical memory"), 826 NULL, q, NULL, 0, 827 CTL_HW, HW_PHYSMEM64, CTL_EOL); 828 sysctl_createv(clog, 0, NULL, NULL, 829 CTLFLAG_PERMANENT, 830 CTLTYPE_QUAD, "usermem64", 831 SYSCTL_DESCR("Bytes of non-kernel memory"), 832 sysctl_hw_usermem, 0, NULL, 0, 833 CTL_HW, HW_USERMEM64, CTL_EOL); 834 sysctl_createv(clog, 0, NULL, NULL, 835 CTLFLAG_PERMANENT, 836 CTLTYPE_INT, "ncpuonline", 837 SYSCTL_DESCR("Number of CPUs online"), 838 NULL, 0, &ncpuonline, 0, 839 CTL_HW, HW_NCPUONLINE, CTL_EOL); 840 } 841 842 #ifdef DEBUG 843 /* 844 * Debugging related system variables. 845 */ 846 struct ctldebug /* debug0, */ /* debug1, */ debug2, debug3, debug4; 847 struct ctldebug debug5, debug6, debug7, debug8, debug9; 848 struct ctldebug debug10, debug11, debug12, debug13, debug14; 849 struct ctldebug debug15, debug16, debug17, debug18, debug19; 850 static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = { 851 &debug0, &debug1, &debug2, &debug3, &debug4, 852 &debug5, &debug6, &debug7, &debug8, &debug9, 853 &debug10, &debug11, &debug12, &debug13, &debug14, 854 &debug15, &debug16, &debug17, &debug18, &debug19, 855 }; 856 857 /* 858 * this setup routine is a replacement for debug_sysctl() 859 * 860 * note that it creates several nodes per defined debug variable 861 */ 862 SYSCTL_SETUP(sysctl_debug_setup, "sysctl debug subtree setup") 863 { 864 struct ctldebug *cdp; 865 char nodename[20]; 866 int i; 867 868 /* 869 * two ways here: 870 * 871 * the "old" way (debug.name -> value) which was emulated by 872 * the sysctl(8) binary 873 * 874 * the new way, which the sysctl(8) binary was actually using 875 876 node debug 877 node debug.0 878 string debug.0.name 879 int debug.0.value 880 int debug.name 881 882 */ 883 884 sysctl_createv(clog, 0, NULL, NULL, 885 CTLFLAG_PERMANENT, 886 CTLTYPE_NODE, "debug", NULL, 887 NULL, 0, NULL, 0, 888 CTL_DEBUG, CTL_EOL); 889 890 for (i = 0; i < CTL_DEBUG_MAXID; i++) { 891 cdp = debugvars[i]; 892 if (cdp->debugname == NULL || cdp->debugvar == NULL) 893 continue; 894 895 snprintf(nodename, sizeof(nodename), "debug%d", i); 896 sysctl_createv(clog, 0, NULL, NULL, 897 CTLFLAG_PERMANENT|CTLFLAG_HIDDEN, 898 CTLTYPE_NODE, nodename, NULL, 899 NULL, 0, NULL, 0, 900 CTL_DEBUG, i, CTL_EOL); 901 sysctl_createv(clog, 0, NULL, NULL, 902 CTLFLAG_PERMANENT|CTLFLAG_HIDDEN, 903 CTLTYPE_STRING, "name", NULL, 904 /*XXXUNCONST*/ 905 NULL, 0, __UNCONST(cdp->debugname), 0, 906 CTL_DEBUG, i, CTL_DEBUG_NAME, CTL_EOL); 907 sysctl_createv(clog, 0, NULL, NULL, 908 CTLFLAG_PERMANENT|CTLFLAG_HIDDEN, 909 CTLTYPE_INT, "value", NULL, 910 NULL, 0, cdp->debugvar, 0, 911 CTL_DEBUG, i, CTL_DEBUG_VALUE, CTL_EOL); 912 sysctl_createv(clog, 0, NULL, NULL, 913 CTLFLAG_PERMANENT, 914 CTLTYPE_INT, cdp->debugname, NULL, 915 NULL, 0, cdp->debugvar, 0, 916 CTL_DEBUG, CTL_CREATE, CTL_EOL); 917 } 918 } 919 #endif /* DEBUG */ 920 921 /* 922 * ******************************************************************** 923 * section 2: private node-specific helper routines. 924 * ******************************************************************** 925 */ 926 927 #ifdef DIAGNOSTIC 928 static int 929 sysctl_kern_trigger_panic(SYSCTLFN_ARGS) 930 { 931 int newtrig, error; 932 struct sysctlnode node; 933 934 newtrig = 0; 935 node = *rnode; 936 node.sysctl_data = &newtrig; 937 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 938 if (error || newp == NULL) 939 return (error); 940 941 if (newtrig != 0) 942 panic("Panic triggered"); 943 944 return (error); 945 } 946 #endif 947 948 /* 949 * sysctl helper routine for kern.maxvnodes. Drain vnodes if 950 * new value is lower than desiredvnodes and then calls reinit 951 * routines that needs to adjust to the new value. 952 */ 953 static int 954 sysctl_kern_maxvnodes(SYSCTLFN_ARGS) 955 { 956 int error, new_vnodes, old_vnodes, new_max; 957 struct sysctlnode node; 958 959 new_vnodes = desiredvnodes; 960 node = *rnode; 961 node.sysctl_data = &new_vnodes; 962 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 963 if (error || newp == NULL) 964 return (error); 965 966 /* 967 * sysctl passes down unsigned values, require them 968 * to be positive 969 */ 970 if (new_vnodes <= 0) 971 return (EINVAL); 972 973 /* Limits: 75% of KVA and physical memory. */ 974 new_max = calc_cache_size(kernel_map, 75, 75) / VNODE_COST; 975 if (new_vnodes > new_max) 976 new_vnodes = new_max; 977 978 old_vnodes = desiredvnodes; 979 desiredvnodes = new_vnodes; 980 if (new_vnodes < old_vnodes) { 981 error = vfs_drainvnodes(new_vnodes); 982 if (error) { 983 desiredvnodes = old_vnodes; 984 return (error); 985 } 986 } 987 vfs_reinit(); 988 nchreinit(); 989 990 return (0); 991 } 992 993 /* 994 * sysctl helper routine for rtc_offset - set time after changes 995 */ 996 static int 997 sysctl_kern_rtc_offset(SYSCTLFN_ARGS) 998 { 999 struct timespec ts, delta; 1000 int error, new_rtc_offset; 1001 struct sysctlnode node; 1002 1003 new_rtc_offset = rtc_offset; 1004 node = *rnode; 1005 node.sysctl_data = &new_rtc_offset; 1006 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1007 if (error || newp == NULL) 1008 return (error); 1009 1010 if (kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_TIME, 1011 KAUTH_REQ_SYSTEM_TIME_RTCOFFSET, 1012 KAUTH_ARG(new_rtc_offset), NULL, NULL)) 1013 return (EPERM); 1014 if (rtc_offset == new_rtc_offset) 1015 return (0); 1016 1017 /* if we change the offset, adjust the time */ 1018 nanotime(&ts); 1019 delta.tv_sec = 60 * (new_rtc_offset - rtc_offset); 1020 delta.tv_nsec = 0; 1021 timespecadd(&ts, &delta, &ts); 1022 rtc_offset = new_rtc_offset; 1023 return (settime(l->l_proc, &ts)); 1024 } 1025 1026 /* 1027 * sysctl helper routine for kern.maxproc. Ensures that the new 1028 * values are not too low or too high. 1029 */ 1030 static int 1031 sysctl_kern_maxproc(SYSCTLFN_ARGS) 1032 { 1033 int error, nmaxproc; 1034 struct sysctlnode node; 1035 1036 nmaxproc = maxproc; 1037 node = *rnode; 1038 node.sysctl_data = &nmaxproc; 1039 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1040 if (error || newp == NULL) 1041 return (error); 1042 1043 if (nmaxproc < 0 || nmaxproc >= PID_MAX) 1044 return (EINVAL); 1045 #ifdef __HAVE_CPU_MAXPROC 1046 if (nmaxproc > cpu_maxproc()) 1047 return (EINVAL); 1048 #endif 1049 maxproc = nmaxproc; 1050 1051 return (0); 1052 } 1053 1054 /* 1055 * sysctl helper function for kern.hostid. The hostid is a long, but 1056 * we export it as an int, so we need to give it a little help. 1057 */ 1058 static int 1059 sysctl_kern_hostid(SYSCTLFN_ARGS) 1060 { 1061 int error, inthostid; 1062 struct sysctlnode node; 1063 1064 inthostid = hostid; /* XXX assumes sizeof int <= sizeof long */ 1065 node = *rnode; 1066 node.sysctl_data = &inthostid; 1067 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1068 if (error || newp == NULL) 1069 return (error); 1070 1071 hostid = (unsigned)inthostid; 1072 1073 return (0); 1074 } 1075 1076 /* 1077 * sysctl helper function for kern.hostname and kern.domainnname. 1078 * resets the relevant recorded length when the underlying name is 1079 * changed. 1080 */ 1081 static int 1082 sysctl_setlen(SYSCTLFN_ARGS) 1083 { 1084 int error; 1085 1086 error = sysctl_lookup(SYSCTLFN_CALL(rnode)); 1087 if (error || newp == NULL) 1088 return (error); 1089 1090 switch (rnode->sysctl_num) { 1091 case KERN_HOSTNAME: 1092 hostnamelen = strlen((const char*)rnode->sysctl_data); 1093 break; 1094 case KERN_DOMAINNAME: 1095 domainnamelen = strlen((const char*)rnode->sysctl_data); 1096 break; 1097 } 1098 1099 return (0); 1100 } 1101 1102 /* 1103 * sysctl helper routine for kern.clockrate. Assembles a struct on 1104 * the fly to be returned to the caller. 1105 */ 1106 static int 1107 sysctl_kern_clockrate(SYSCTLFN_ARGS) 1108 { 1109 struct clockinfo clkinfo; 1110 struct sysctlnode node; 1111 1112 clkinfo.tick = tick; 1113 clkinfo.tickadj = tickadj; 1114 clkinfo.hz = hz; 1115 clkinfo.profhz = profhz; 1116 clkinfo.stathz = stathz ? stathz : hz; 1117 1118 node = *rnode; 1119 node.sysctl_data = &clkinfo; 1120 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 1121 } 1122 1123 /* 1124 * sysctl helper routine for kern.msgbufsize and kern.msgbuf. For the 1125 * former it merely checks the message buffer is set up. For the latter, 1126 * it also copies out the data if necessary. 1127 */ 1128 static int 1129 sysctl_msgbuf(SYSCTLFN_ARGS) 1130 { 1131 char *where = oldp; 1132 size_t len, maxlen; 1133 long beg, end; 1134 extern kmutex_t log_lock; 1135 int error; 1136 1137 if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) { 1138 msgbufenabled = 0; 1139 return (ENXIO); 1140 } 1141 1142 switch (rnode->sysctl_num) { 1143 case KERN_MSGBUFSIZE: { 1144 struct sysctlnode node = *rnode; 1145 int msg_bufs = (int)msgbufp->msg_bufs; 1146 node.sysctl_data = &msg_bufs; 1147 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 1148 } 1149 case KERN_MSGBUF: 1150 break; 1151 default: 1152 return (EOPNOTSUPP); 1153 } 1154 1155 if (newp != NULL) 1156 return (EPERM); 1157 1158 if (oldp == NULL) { 1159 /* always return full buffer size */ 1160 *oldlenp = msgbufp->msg_bufs; 1161 return (0); 1162 } 1163 1164 sysctl_unlock(); 1165 1166 /* 1167 * First, copy from the write pointer to the end of 1168 * message buffer. 1169 */ 1170 error = 0; 1171 mutex_spin_enter(&log_lock); 1172 maxlen = MIN(msgbufp->msg_bufs, *oldlenp); 1173 beg = msgbufp->msg_bufx; 1174 end = msgbufp->msg_bufs; 1175 mutex_spin_exit(&log_lock); 1176 1177 while (maxlen > 0) { 1178 len = MIN(end - beg, maxlen); 1179 if (len == 0) 1180 break; 1181 /* XXX unlocked, but hardly matters. */ 1182 error = dcopyout(l, &msgbufp->msg_bufc[beg], where, len); 1183 if (error) 1184 break; 1185 where += len; 1186 maxlen -= len; 1187 1188 /* 1189 * ... then, copy from the beginning of message buffer to 1190 * the write pointer. 1191 */ 1192 beg = 0; 1193 end = msgbufp->msg_bufx; 1194 } 1195 1196 sysctl_relock(); 1197 return (error); 1198 } 1199 1200 /* 1201 * sysctl helper routine for kern.defcorename. In the case of a new 1202 * string being assigned, check that it's not a zero-length string. 1203 * (XXX the check in -current doesn't work, but do we really care?) 1204 */ 1205 static int 1206 sysctl_kern_defcorename(SYSCTLFN_ARGS) 1207 { 1208 int error; 1209 char *newcorename; 1210 struct sysctlnode node; 1211 1212 newcorename = PNBUF_GET(); 1213 node = *rnode; 1214 node.sysctl_data = &newcorename[0]; 1215 memcpy(node.sysctl_data, rnode->sysctl_data, MAXPATHLEN); 1216 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1217 if (error || newp == NULL) { 1218 goto done; 1219 } 1220 1221 /* 1222 * when sysctl_lookup() deals with a string, it's guaranteed 1223 * to come back nul terminated. So there. :) 1224 */ 1225 if (strlen(newcorename) == 0) { 1226 error = EINVAL; 1227 } else { 1228 memcpy(rnode->sysctl_data, node.sysctl_data, MAXPATHLEN); 1229 error = 0; 1230 } 1231 done: 1232 PNBUF_PUT(newcorename); 1233 return error; 1234 } 1235 1236 /* 1237 * sysctl helper routine for kern.cp_time node. Adds up cpu time 1238 * across all cpus. 1239 */ 1240 static int 1241 sysctl_kern_cptime(SYSCTLFN_ARGS) 1242 { 1243 struct sysctlnode node = *rnode; 1244 uint64_t *cp_time = NULL; 1245 int error, n = ncpu, i; 1246 struct cpu_info *ci; 1247 CPU_INFO_ITERATOR cii; 1248 1249 /* 1250 * if you specifically pass a buffer that is the size of the 1251 * sum, or if you are probing for the size, you get the "sum" 1252 * of cp_time (and the size thereof) across all processors. 1253 * 1254 * alternately, you can pass an additional mib number and get 1255 * cp_time for that particular processor. 1256 */ 1257 switch (namelen) { 1258 case 0: 1259 if (*oldlenp == sizeof(uint64_t) * CPUSTATES || oldp == NULL) { 1260 node.sysctl_size = sizeof(uint64_t) * CPUSTATES; 1261 n = -1; /* SUM */ 1262 } 1263 else { 1264 node.sysctl_size = n * sizeof(uint64_t) * CPUSTATES; 1265 n = -2; /* ALL */ 1266 } 1267 break; 1268 case 1: 1269 if (name[0] < 0 || name[0] >= n) 1270 return (ENOENT); /* ENOSUCHPROCESSOR */ 1271 node.sysctl_size = sizeof(uint64_t) * CPUSTATES; 1272 n = name[0]; 1273 /* 1274 * adjust these so that sysctl_lookup() will be happy 1275 */ 1276 name++; 1277 namelen--; 1278 break; 1279 default: 1280 return (EINVAL); 1281 } 1282 1283 cp_time = kmem_alloc(node.sysctl_size, KM_SLEEP); 1284 if (cp_time == NULL) 1285 return (ENOMEM); 1286 node.sysctl_data = cp_time; 1287 memset(cp_time, 0, node.sysctl_size); 1288 1289 for (CPU_INFO_FOREACH(cii, ci)) { 1290 if (n <= 0) { 1291 for (i = 0; i < CPUSTATES; i++) { 1292 cp_time[i] += ci->ci_schedstate.spc_cp_time[i]; 1293 } 1294 } 1295 /* 1296 * if a specific processor was requested and we just 1297 * did it, we're done here 1298 */ 1299 if (n == 0) 1300 break; 1301 /* 1302 * if doing "all", skip to next cp_time set for next processor 1303 */ 1304 if (n == -2) 1305 cp_time += CPUSTATES; 1306 /* 1307 * if we're doing a specific processor, we're one 1308 * processor closer 1309 */ 1310 if (n > 0) 1311 n--; 1312 } 1313 1314 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1315 kmem_free(node.sysctl_data, node.sysctl_size); 1316 return (error); 1317 } 1318 1319 #if NPTY > 0 1320 /* 1321 * sysctl helper routine for kern.maxptys. Ensures that any new value 1322 * is acceptable to the pty subsystem. 1323 */ 1324 static int 1325 sysctl_kern_maxptys(SYSCTLFN_ARGS) 1326 { 1327 int pty_maxptys(int, int); /* defined in kern/tty_pty.c */ 1328 int error, xmax; 1329 struct sysctlnode node; 1330 1331 /* get current value of maxptys */ 1332 xmax = pty_maxptys(0, 0); 1333 1334 node = *rnode; 1335 node.sysctl_data = &xmax; 1336 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1337 if (error || newp == NULL) 1338 return (error); 1339 1340 if (xmax != pty_maxptys(xmax, 1)) 1341 return (EINVAL); 1342 1343 return (0); 1344 } 1345 #endif /* NPTY > 0 */ 1346 1347 /* 1348 * sysctl helper routine for kern.urandom node. Picks a random number 1349 * for you. 1350 */ 1351 static int 1352 sysctl_kern_urnd(SYSCTLFN_ARGS) 1353 { 1354 int v, rv; 1355 1356 rv = cprng_strong(sysctl_prng, &v, sizeof(v), 0); 1357 if (rv == sizeof(v)) { 1358 struct sysctlnode node = *rnode; 1359 node.sysctl_data = &v; 1360 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 1361 } 1362 else 1363 return (EIO); /*XXX*/ 1364 } 1365 1366 /* 1367 * sysctl helper routine for kern.arandom node. Picks a random number 1368 * for you. 1369 */ 1370 static int 1371 sysctl_kern_arnd(SYSCTLFN_ARGS) 1372 { 1373 int error; 1374 void *v; 1375 struct sysctlnode node = *rnode; 1376 1377 if (*oldlenp == 0) 1378 return 0; 1379 /* 1380 * This code used to allow sucking 8192 bytes at a time out 1381 * of the kernel arc4random generator. Evidently there is some 1382 * very old OpenBSD application code that may try to do this. 1383 * 1384 * Note that this node is documented as type "INT" -- 4 or 8 1385 * bytes, not 8192. 1386 * 1387 * We continue to support this abuse of the "len" pointer here 1388 * but only 256 bytes at a time, as, anecdotally, the actual 1389 * application use here was to generate RC4 keys in userspace. 1390 * 1391 * Support for such large requests will probably be removed 1392 * entirely in the future. 1393 */ 1394 if (*oldlenp > 256) 1395 return E2BIG; 1396 1397 v = kmem_alloc(*oldlenp, KM_SLEEP); 1398 cprng_fast(v, *oldlenp); 1399 node.sysctl_data = v; 1400 node.sysctl_size = *oldlenp; 1401 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1402 kmem_free(v, *oldlenp); 1403 return error; 1404 } 1405 /* 1406 * sysctl helper routine to do kern.lwp.* work. 1407 */ 1408 static int 1409 sysctl_kern_lwp(SYSCTLFN_ARGS) 1410 { 1411 struct kinfo_lwp klwp; 1412 struct proc *p; 1413 struct lwp *l2, *l3; 1414 char *where, *dp; 1415 int pid, elem_size, elem_count; 1416 int buflen, needed, error; 1417 bool gotit; 1418 1419 if (namelen == 1 && name[0] == CTL_QUERY) 1420 return (sysctl_query(SYSCTLFN_CALL(rnode))); 1421 1422 dp = where = oldp; 1423 buflen = where != NULL ? *oldlenp : 0; 1424 error = needed = 0; 1425 1426 if (newp != NULL || namelen != 3) 1427 return (EINVAL); 1428 pid = name[0]; 1429 elem_size = name[1]; 1430 elem_count = name[2]; 1431 1432 sysctl_unlock(); 1433 if (pid == -1) { 1434 mutex_enter(proc_lock); 1435 PROCLIST_FOREACH(p, &allproc) { 1436 /* Grab a hold on the process. */ 1437 if (!rw_tryenter(&p->p_reflock, RW_READER)) { 1438 continue; 1439 } 1440 mutex_exit(proc_lock); 1441 1442 mutex_enter(p->p_lock); 1443 LIST_FOREACH(l2, &p->p_lwps, l_sibling) { 1444 if (buflen >= elem_size && elem_count > 0) { 1445 lwp_lock(l2); 1446 fill_lwp(l2, &klwp); 1447 lwp_unlock(l2); 1448 mutex_exit(p->p_lock); 1449 1450 /* 1451 * Copy out elem_size, but not 1452 * larger than the size of a 1453 * struct kinfo_proc2. 1454 */ 1455 error = dcopyout(l, &klwp, dp, 1456 min(sizeof(klwp), elem_size)); 1457 if (error) { 1458 rw_exit(&p->p_reflock); 1459 goto cleanup; 1460 } 1461 mutex_enter(p->p_lock); 1462 LIST_FOREACH(l3, &p->p_lwps, 1463 l_sibling) { 1464 if (l2 == l3) 1465 break; 1466 } 1467 if (l3 == NULL) { 1468 mutex_exit(p->p_lock); 1469 rw_exit(&p->p_reflock); 1470 error = EAGAIN; 1471 goto cleanup; 1472 } 1473 dp += elem_size; 1474 buflen -= elem_size; 1475 elem_count--; 1476 } 1477 needed += elem_size; 1478 } 1479 mutex_exit(p->p_lock); 1480 1481 /* Drop reference to process. */ 1482 mutex_enter(proc_lock); 1483 rw_exit(&p->p_reflock); 1484 } 1485 mutex_exit(proc_lock); 1486 } else { 1487 mutex_enter(proc_lock); 1488 p = proc_find(pid); 1489 if (p == NULL) { 1490 error = ESRCH; 1491 mutex_exit(proc_lock); 1492 goto cleanup; 1493 } 1494 /* Grab a hold on the process. */ 1495 gotit = rw_tryenter(&p->p_reflock, RW_READER); 1496 mutex_exit(proc_lock); 1497 if (!gotit) { 1498 error = ESRCH; 1499 goto cleanup; 1500 } 1501 1502 mutex_enter(p->p_lock); 1503 LIST_FOREACH(l2, &p->p_lwps, l_sibling) { 1504 if (buflen >= elem_size && elem_count > 0) { 1505 lwp_lock(l2); 1506 fill_lwp(l2, &klwp); 1507 lwp_unlock(l2); 1508 mutex_exit(p->p_lock); 1509 /* 1510 * Copy out elem_size, but not larger than 1511 * the size of a struct kinfo_proc2. 1512 */ 1513 error = dcopyout(l, &klwp, dp, 1514 min(sizeof(klwp), elem_size)); 1515 if (error) { 1516 rw_exit(&p->p_reflock); 1517 goto cleanup; 1518 } 1519 mutex_enter(p->p_lock); 1520 LIST_FOREACH(l3, &p->p_lwps, l_sibling) { 1521 if (l2 == l3) 1522 break; 1523 } 1524 if (l3 == NULL) { 1525 mutex_exit(p->p_lock); 1526 rw_exit(&p->p_reflock); 1527 error = EAGAIN; 1528 goto cleanup; 1529 } 1530 dp += elem_size; 1531 buflen -= elem_size; 1532 elem_count--; 1533 } 1534 needed += elem_size; 1535 } 1536 mutex_exit(p->p_lock); 1537 1538 /* Drop reference to process. */ 1539 rw_exit(&p->p_reflock); 1540 } 1541 1542 if (where != NULL) { 1543 *oldlenp = dp - where; 1544 if (needed > *oldlenp) { 1545 sysctl_relock(); 1546 return (ENOMEM); 1547 } 1548 } else { 1549 needed += KERN_LWPSLOP; 1550 *oldlenp = needed; 1551 } 1552 error = 0; 1553 cleanup: 1554 sysctl_relock(); 1555 return (error); 1556 } 1557 1558 /* 1559 * sysctl helper routine for kern.forkfsleep node. Ensures that the 1560 * given value is not too large or two small, and is at least one 1561 * timer tick if not zero. 1562 */ 1563 static int 1564 sysctl_kern_forkfsleep(SYSCTLFN_ARGS) 1565 { 1566 /* userland sees value in ms, internally is in ticks */ 1567 extern int forkfsleep; /* defined in kern/kern_fork.c */ 1568 int error, timo, lsleep; 1569 struct sysctlnode node; 1570 1571 lsleep = forkfsleep * 1000 / hz; 1572 node = *rnode; 1573 node.sysctl_data = &lsleep; 1574 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1575 if (error || newp == NULL) 1576 return (error); 1577 1578 /* refuse negative values, and overly 'long time' */ 1579 if (lsleep < 0 || lsleep > MAXSLP * 1000) 1580 return (EINVAL); 1581 1582 timo = mstohz(lsleep); 1583 1584 /* if the interval is >0 ms && <1 tick, use 1 tick */ 1585 if (lsleep != 0 && timo == 0) 1586 forkfsleep = 1; 1587 else 1588 forkfsleep = timo; 1589 1590 return (0); 1591 } 1592 1593 /* 1594 * sysctl helper routine for kern.root_partition 1595 */ 1596 static int 1597 sysctl_kern_root_partition(SYSCTLFN_ARGS) 1598 { 1599 int rootpart = DISKPART(rootdev); 1600 struct sysctlnode node = *rnode; 1601 1602 node.sysctl_data = &rootpart; 1603 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 1604 } 1605 1606 /* 1607 * sysctl helper function for kern.drivers 1608 */ 1609 static int 1610 sysctl_kern_drivers(SYSCTLFN_ARGS) 1611 { 1612 int error; 1613 size_t buflen; 1614 struct kinfo_drivers kd; 1615 char *start, *where; 1616 const char *dname; 1617 int i; 1618 extern struct devsw_conv *devsw_conv; 1619 extern int max_devsw_convs; 1620 1621 start = where = oldp; 1622 buflen = *oldlenp; 1623 if (where == NULL) { 1624 *oldlenp = max_devsw_convs * sizeof kd; 1625 return 0; 1626 } 1627 1628 /* 1629 * An array of kinfo_drivers structures 1630 */ 1631 error = 0; 1632 sysctl_unlock(); 1633 mutex_enter(&device_lock); 1634 for (i = 0; i < max_devsw_convs; i++) { 1635 dname = devsw_conv[i].d_name; 1636 if (dname == NULL) 1637 continue; 1638 if (buflen < sizeof kd) { 1639 error = ENOMEM; 1640 break; 1641 } 1642 memset(&kd, 0, sizeof(kd)); 1643 kd.d_bmajor = devsw_conv[i].d_bmajor; 1644 kd.d_cmajor = devsw_conv[i].d_cmajor; 1645 strlcpy(kd.d_name, dname, sizeof kd.d_name); 1646 mutex_exit(&device_lock); 1647 error = dcopyout(l, &kd, where, sizeof kd); 1648 mutex_enter(&device_lock); 1649 if (error != 0) 1650 break; 1651 buflen -= sizeof kd; 1652 where += sizeof kd; 1653 } 1654 mutex_exit(&device_lock); 1655 sysctl_relock(); 1656 *oldlenp = where - start; 1657 return error; 1658 } 1659 1660 static int 1661 sysctl_security_setidcore(SYSCTLFN_ARGS) 1662 { 1663 int newsize, error; 1664 struct sysctlnode node; 1665 1666 node = *rnode; 1667 node.sysctl_data = &newsize; 1668 newsize = *(int *)rnode->sysctl_data; 1669 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1670 if (error || newp == NULL) 1671 return error; 1672 1673 if (kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_SETIDCORE, 1674 0, NULL, NULL, NULL)) 1675 return (EPERM); 1676 1677 *(int *)rnode->sysctl_data = newsize; 1678 1679 return 0; 1680 } 1681 1682 static int 1683 sysctl_security_setidcorename(SYSCTLFN_ARGS) 1684 { 1685 int error; 1686 char *newsetidcorename; 1687 struct sysctlnode node; 1688 1689 newsetidcorename = PNBUF_GET(); 1690 node = *rnode; 1691 node.sysctl_data = newsetidcorename; 1692 memcpy(node.sysctl_data, rnode->sysctl_data, MAXPATHLEN); 1693 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1694 if (error || newp == NULL) { 1695 goto out; 1696 } 1697 if (kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_SETIDCORE, 1698 0, NULL, NULL, NULL)) { 1699 error = EPERM; 1700 goto out; 1701 } 1702 if (strlen(newsetidcorename) == 0) { 1703 error = EINVAL; 1704 goto out; 1705 } 1706 memcpy(rnode->sysctl_data, node.sysctl_data, MAXPATHLEN); 1707 out: 1708 PNBUF_PUT(newsetidcorename); 1709 return error; 1710 } 1711 1712 /* 1713 * sysctl helper routine for kern.cp_id node. Maps cpus to their 1714 * cpuids. 1715 */ 1716 static int 1717 sysctl_kern_cpid(SYSCTLFN_ARGS) 1718 { 1719 struct sysctlnode node = *rnode; 1720 uint64_t *cp_id = NULL; 1721 int error, n = ncpu; 1722 struct cpu_info *ci; 1723 CPU_INFO_ITERATOR cii; 1724 1725 /* 1726 * Here you may either retrieve a single cpu id or the whole 1727 * set. The size you get back when probing depends on what 1728 * you ask for. 1729 */ 1730 switch (namelen) { 1731 case 0: 1732 node.sysctl_size = n * sizeof(uint64_t); 1733 n = -2; /* ALL */ 1734 break; 1735 case 1: 1736 if (name[0] < 0 || name[0] >= n) 1737 return (ENOENT); /* ENOSUCHPROCESSOR */ 1738 node.sysctl_size = sizeof(uint64_t); 1739 n = name[0]; 1740 /* 1741 * adjust these so that sysctl_lookup() will be happy 1742 */ 1743 name++; 1744 namelen--; 1745 break; 1746 default: 1747 return (EINVAL); 1748 } 1749 1750 cp_id = kmem_alloc(node.sysctl_size, KM_SLEEP); 1751 if (cp_id == NULL) 1752 return (ENOMEM); 1753 node.sysctl_data = cp_id; 1754 memset(cp_id, 0, node.sysctl_size); 1755 1756 for (CPU_INFO_FOREACH(cii, ci)) { 1757 if (n <= 0) 1758 cp_id[0] = cpu_index(ci); 1759 /* 1760 * if a specific processor was requested and we just 1761 * did it, we're done here 1762 */ 1763 if (n == 0) 1764 break; 1765 /* 1766 * if doing "all", skip to next cp_id slot for next processor 1767 */ 1768 if (n == -2) 1769 cp_id++; 1770 /* 1771 * if we're doing a specific processor, we're one 1772 * processor closer 1773 */ 1774 if (n > 0) 1775 n--; 1776 } 1777 1778 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1779 kmem_free(node.sysctl_data, node.sysctl_size); 1780 return (error); 1781 } 1782 1783 /* 1784 * sysctl helper routine for hw.usermem and hw.usermem64. Values are 1785 * calculate on the fly taking into account integer overflow and the 1786 * current wired count. 1787 */ 1788 static int 1789 sysctl_hw_usermem(SYSCTLFN_ARGS) 1790 { 1791 u_int ui; 1792 u_quad_t uq; 1793 struct sysctlnode node; 1794 1795 node = *rnode; 1796 switch (rnode->sysctl_num) { 1797 case HW_USERMEM: 1798 if ((ui = physmem - uvmexp.wired) > (UINT_MAX / PAGE_SIZE)) 1799 ui = UINT_MAX; 1800 else 1801 ui *= PAGE_SIZE; 1802 node.sysctl_data = &ui; 1803 break; 1804 case HW_USERMEM64: 1805 uq = (u_quad_t)(physmem - uvmexp.wired) * PAGE_SIZE; 1806 node.sysctl_data = &uq; 1807 break; 1808 default: 1809 return (EINVAL); 1810 } 1811 1812 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 1813 } 1814 1815 /* 1816 * sysctl helper routine for kern.cnmagic node. Pulls the old value 1817 * out, encoded, and stuffs the new value in for decoding. 1818 */ 1819 static int 1820 sysctl_hw_cnmagic(SYSCTLFN_ARGS) 1821 { 1822 char magic[CNS_LEN]; 1823 int error; 1824 struct sysctlnode node; 1825 1826 if (oldp) 1827 cn_get_magic(magic, CNS_LEN); 1828 node = *rnode; 1829 node.sysctl_data = &magic[0]; 1830 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1831 if (error || newp == NULL) 1832 return (error); 1833 1834 return (cn_set_magic(magic)); 1835 } 1836 1837 /* 1838 * ******************************************************************** 1839 * section 3: public helper routines that are used for more than one 1840 * node 1841 * ******************************************************************** 1842 */ 1843 1844 /* 1845 * sysctl helper routine for the kern.root_device node and some ports' 1846 * machdep.root_device nodes. 1847 */ 1848 int 1849 sysctl_root_device(SYSCTLFN_ARGS) 1850 { 1851 struct sysctlnode node; 1852 1853 node = *rnode; 1854 node.sysctl_data = __UNCONST(device_xname(root_device)); 1855 node.sysctl_size = strlen(device_xname(root_device)) + 1; 1856 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 1857 } 1858 1859 /* 1860 * sysctl helper routine for kern.consdev, dependent on the current 1861 * state of the console. Also used for machdep.console_device on some 1862 * ports. 1863 */ 1864 int 1865 sysctl_consdev(SYSCTLFN_ARGS) 1866 { 1867 dev_t consdev; 1868 uint32_t oconsdev; 1869 struct sysctlnode node; 1870 1871 if (cn_tab != NULL) 1872 consdev = cn_tab->cn_dev; 1873 else 1874 consdev = NODEV; 1875 node = *rnode; 1876 switch (*oldlenp) { 1877 case sizeof(consdev): 1878 node.sysctl_data = &consdev; 1879 node.sysctl_size = sizeof(consdev); 1880 break; 1881 case sizeof(oconsdev): 1882 oconsdev = (uint32_t)consdev; 1883 node.sysctl_data = &oconsdev; 1884 node.sysctl_size = sizeof(oconsdev); 1885 break; 1886 default: 1887 return EINVAL; 1888 } 1889 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 1890 } 1891 1892 /* 1893 * ******************************************************************** 1894 * section 4: support for some helpers 1895 * ******************************************************************** 1896 */ 1897 1898 1899 /* 1900 * Fill in a kinfo_lwp structure for the specified lwp. 1901 */ 1902 static void 1903 fill_lwp(struct lwp *l, struct kinfo_lwp *kl) 1904 { 1905 struct proc *p = l->l_proc; 1906 struct timeval tv; 1907 1908 KASSERT(lwp_locked(l, NULL)); 1909 1910 memset(kl, 0, sizeof(*kl)); 1911 1912 kl->l_forw = 0; 1913 kl->l_back = 0; 1914 kl->l_laddr = PTRTOUINT64(l); 1915 kl->l_addr = PTRTOUINT64(l->l_addr); 1916 kl->l_stat = l->l_stat; 1917 kl->l_lid = l->l_lid; 1918 kl->l_flag = L_INMEM; 1919 kl->l_flag |= sysctl_map_flags(sysctl_lwpprflagmap, l->l_prflag); 1920 kl->l_flag |= sysctl_map_flags(sysctl_lwpflagmap, l->l_flag); 1921 1922 kl->l_swtime = l->l_swtime; 1923 kl->l_slptime = l->l_slptime; 1924 if (l->l_stat == LSONPROC) 1925 kl->l_schedflags = l->l_cpu->ci_schedstate.spc_flags; 1926 else 1927 kl->l_schedflags = 0; 1928 kl->l_priority = lwp_eprio(l); 1929 kl->l_usrpri = l->l_priority; 1930 if (l->l_wchan) 1931 strncpy(kl->l_wmesg, l->l_wmesg, sizeof(kl->l_wmesg)); 1932 kl->l_wchan = PTRTOUINT64(l->l_wchan); 1933 kl->l_cpuid = cpu_index(l->l_cpu); 1934 bintime2timeval(&l->l_rtime, &tv); 1935 kl->l_rtime_sec = tv.tv_sec; 1936 kl->l_rtime_usec = tv.tv_usec; 1937 kl->l_cpticks = l->l_cpticks; 1938 kl->l_pctcpu = l->l_pctcpu; 1939 kl->l_pid = p->p_pid; 1940 if (l->l_name == NULL) 1941 kl->l_name[0] = '\0'; 1942 else 1943 strlcpy(kl->l_name, l->l_name, sizeof(kl->l_name)); 1944 } 1945