init_sysctl.c revision 1.204.4.1
1 /* $NetBSD: init_sysctl.c,v 1.204.4.1 2015/06/06 14:40:21 skrll 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 1.204.4.1 2015/06/06 14:40:21 skrll 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 <dev/cons.h> 54 #include <sys/socketvar.h> 55 #include <sys/file.h> 56 #include <sys/filedesc.h> 57 #include <sys/tty.h> 58 #include <sys/kmem.h> 59 #include <sys/resource.h> 60 #include <sys/resourcevar.h> 61 #include <sys/exec.h> 62 #include <sys/conf.h> 63 #include <sys/device.h> 64 #include <sys/stat.h> 65 #include <sys/kauth.h> 66 #include <sys/ktrace.h> 67 #include <sys/ksem.h> 68 69 #include <sys/cpu.h> 70 71 int security_setidcore_dump; 72 char security_setidcore_path[MAXPATHLEN] = "/var/crash/%n.core"; 73 uid_t security_setidcore_owner = 0; 74 gid_t security_setidcore_group = 0; 75 mode_t security_setidcore_mode = (S_IRUSR|S_IWUSR); 76 77 /* 78 * Current status of SysV IPC capability. Initially, these are 79 * 0 if the capability is not built-in to the kernel, but can 80 * be updated if the appropriate kernel module is (auto)loaded. 81 */ 82 83 int kern_has_sysvmsg = 0; 84 int kern_has_sysvshm = 0; 85 int kern_has_sysvsem = 0; 86 87 static const u_int sysctl_lwpprflagmap[] = { 88 LPR_DETACHED, L_DETACHED, 89 0 90 }; 91 92 /* 93 * try over estimating by 5 procs/lwps 94 */ 95 #define KERN_LWPSLOP (5 * sizeof(struct kinfo_lwp)) 96 97 static int dcopyout(struct lwp *, const void *, void *, size_t); 98 99 static int 100 dcopyout(struct lwp *l, const void *kaddr, void *uaddr, size_t len) 101 { 102 int error; 103 104 error = copyout(kaddr, uaddr, len); 105 ktrmibio(-1, UIO_READ, uaddr, len, error); 106 107 return error; 108 } 109 110 #ifdef DIAGNOSTIC 111 static int sysctl_kern_trigger_panic(SYSCTLFN_PROTO); 112 #endif 113 static int sysctl_kern_maxvnodes(SYSCTLFN_PROTO); 114 static int sysctl_kern_rtc_offset(SYSCTLFN_PROTO); 115 static int sysctl_kern_maxproc(SYSCTLFN_PROTO); 116 static int sysctl_kern_hostid(SYSCTLFN_PROTO); 117 static int sysctl_kern_defcorename(SYSCTLFN_PROTO); 118 static int sysctl_kern_cptime(SYSCTLFN_PROTO); 119 #if NPTY > 0 120 static int sysctl_kern_maxptys(SYSCTLFN_PROTO); 121 #endif /* NPTY > 0 */ 122 static int sysctl_kern_lwp(SYSCTLFN_PROTO); 123 static int sysctl_kern_forkfsleep(SYSCTLFN_PROTO); 124 static int sysctl_kern_root_partition(SYSCTLFN_PROTO); 125 static int sysctl_kern_drivers(SYSCTLFN_PROTO); 126 static int sysctl_security_setidcore(SYSCTLFN_PROTO); 127 static int sysctl_security_setidcorename(SYSCTLFN_PROTO); 128 static int sysctl_kern_cpid(SYSCTLFN_PROTO); 129 static int sysctl_hw_usermem(SYSCTLFN_PROTO); 130 static int sysctl_hw_cnmagic(SYSCTLFN_PROTO); 131 132 static void fill_lwp(struct lwp *l, struct kinfo_lwp *kl); 133 134 /* 135 * ******************************************************************** 136 * section 1: setup routines 137 * ******************************************************************** 138 * These functions are stuffed into a link set for sysctl setup 139 * functions. They're never called or referenced from anywhere else. 140 * ******************************************************************** 141 */ 142 143 /* 144 * this setup routine is a replacement for kern_sysctl() 145 */ 146 SYSCTL_SETUP(sysctl_kern_setup, "sysctl kern subtree setup") 147 { 148 extern int kern_logsigexit; /* defined in kern/kern_sig.c */ 149 extern fixpt_t ccpu; /* defined in kern/kern_synch.c */ 150 extern int dumponpanic; /* defined in kern/subr_prf.c */ 151 const struct sysctlnode *rnode; 152 153 sysctl_createv(clog, 0, NULL, NULL, 154 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 155 CTLTYPE_INT, "maxvnodes", 156 SYSCTL_DESCR("Maximum number of vnodes"), 157 sysctl_kern_maxvnodes, 0, NULL, 0, 158 CTL_KERN, KERN_MAXVNODES, CTL_EOL); 159 sysctl_createv(clog, 0, NULL, NULL, 160 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 161 CTLTYPE_INT, "maxproc", 162 SYSCTL_DESCR("Maximum number of simultaneous processes"), 163 sysctl_kern_maxproc, 0, NULL, 0, 164 CTL_KERN, KERN_MAXPROC, CTL_EOL); 165 sysctl_createv(clog, 0, NULL, NULL, 166 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 167 CTLTYPE_INT, "maxfiles", 168 SYSCTL_DESCR("Maximum number of open files"), 169 NULL, 0, &maxfiles, 0, 170 CTL_KERN, KERN_MAXFILES, CTL_EOL); 171 sysctl_createv(clog, 0, NULL, NULL, 172 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 173 CTLTYPE_INT, "argmax", 174 SYSCTL_DESCR("Maximum number of bytes of arguments to " 175 "execve(2)"), 176 NULL, ARG_MAX, NULL, 0, 177 CTL_KERN, KERN_ARGMAX, CTL_EOL); 178 sysctl_createv(clog, 0, NULL, NULL, 179 CTLFLAG_PERMANENT|CTLFLAG_READWRITE|CTLFLAG_HEX, 180 CTLTYPE_INT, "hostid", 181 SYSCTL_DESCR("System host ID number"), 182 sysctl_kern_hostid, 0, NULL, 0, 183 CTL_KERN, KERN_HOSTID, CTL_EOL); 184 sysctl_createv(clog, 0, NULL, NULL, 185 CTLFLAG_PERMANENT, 186 CTLTYPE_STRUCT, "vnode", 187 SYSCTL_DESCR("System vnode table"), 188 sysctl_kern_vnode, 0, NULL, 0, 189 CTL_KERN, KERN_VNODE, CTL_EOL); 190 #ifndef GPROF 191 sysctl_createv(clog, 0, NULL, NULL, 192 CTLFLAG_PERMANENT, 193 CTLTYPE_NODE, "profiling", 194 SYSCTL_DESCR("Profiling information (not available)"), 195 sysctl_notavail, 0, NULL, 0, 196 CTL_KERN, KERN_PROF, CTL_EOL); 197 #endif 198 sysctl_createv(clog, 0, NULL, NULL, 199 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 200 CTLTYPE_INT, "posix1version", 201 SYSCTL_DESCR("Version of ISO/IEC 9945 (POSIX 1003.1) " 202 "with which the operating system attempts " 203 "to comply"), 204 NULL, _POSIX_VERSION, NULL, 0, 205 CTL_KERN, KERN_POSIX1, CTL_EOL); 206 sysctl_createv(clog, 0, NULL, NULL, 207 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 208 CTLTYPE_INT, "ngroups", 209 SYSCTL_DESCR("Maximum number of supplemental groups"), 210 NULL, NGROUPS_MAX, NULL, 0, 211 CTL_KERN, KERN_NGROUPS, CTL_EOL); 212 sysctl_createv(clog, 0, NULL, NULL, 213 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 214 CTLTYPE_INT, "job_control", 215 SYSCTL_DESCR("Whether job control is available"), 216 NULL, 1, NULL, 0, 217 CTL_KERN, KERN_JOB_CONTROL, CTL_EOL); 218 sysctl_createv(clog, 0, NULL, NULL, 219 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 220 CTLTYPE_INT, "saved_ids", 221 SYSCTL_DESCR("Whether POSIX saved set-group/user ID is " 222 "available"), NULL, 223 #ifdef _POSIX_SAVED_IDS 224 1, 225 #else /* _POSIX_SAVED_IDS */ 226 0, 227 #endif /* _POSIX_SAVED_IDS */ 228 NULL, 0, CTL_KERN, KERN_SAVED_IDS, CTL_EOL); 229 sysctl_createv(clog, 0, NULL, NULL, 230 CTLFLAG_PERMANENT|CTLFLAG_HEX, 231 CTLTYPE_INT, "boothowto", 232 SYSCTL_DESCR("Flags from boot loader"), 233 NULL, 0, &boothowto, sizeof(boothowto), 234 CTL_KERN, CTL_CREATE, CTL_EOL); 235 sysctl_createv(clog, 0, NULL, NULL, 236 CTLFLAG_PERMANENT, 237 CTLTYPE_STRUCT, "boottime", 238 SYSCTL_DESCR("System boot time"), 239 NULL, 0, &boottime, sizeof(boottime), 240 CTL_KERN, KERN_BOOTTIME, CTL_EOL); 241 sysctl_createv(clog, 0, NULL, NULL, 242 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 243 CTLTYPE_INT, "maxpartitions", 244 SYSCTL_DESCR("Maximum number of partitions allowed per " 245 "disk"), 246 NULL, MAXPARTITIONS, NULL, 0, 247 CTL_KERN, KERN_MAXPARTITIONS, CTL_EOL); 248 sysctl_createv(clog, 0, NULL, NULL, 249 CTLFLAG_PERMANENT, 250 CTLTYPE_STRUCT, "timex", NULL, 251 sysctl_notavail, 0, NULL, 0, 252 CTL_KERN, KERN_TIMEX, CTL_EOL); 253 sysctl_createv(clog, 0, NULL, NULL, 254 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 255 CTLTYPE_INT, "rtc_offset", 256 SYSCTL_DESCR("Offset of real time clock from UTC in " 257 "minutes"), 258 sysctl_kern_rtc_offset, 0, &rtc_offset, 0, 259 CTL_KERN, KERN_RTC_OFFSET, CTL_EOL); 260 sysctl_createv(clog, 0, NULL, NULL, 261 CTLFLAG_PERMANENT, 262 CTLTYPE_STRING, "root_device", 263 SYSCTL_DESCR("Name of the root device"), 264 sysctl_root_device, 0, NULL, 0, 265 CTL_KERN, KERN_ROOT_DEVICE, CTL_EOL); 266 sysctl_createv(clog, 0, NULL, NULL, 267 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 268 CTLTYPE_INT, "fsync", 269 SYSCTL_DESCR("Whether the POSIX 1003.1b File " 270 "Synchronization Option is available on " 271 "this system"), 272 NULL, 1, NULL, 0, 273 CTL_KERN, KERN_FSYNC, CTL_EOL); 274 sysctl_createv(clog, 0, NULL, NULL, 275 CTLFLAG_PERMANENT, 276 CTLTYPE_NODE, "ipc", 277 SYSCTL_DESCR("SysV IPC options"), 278 NULL, 0, NULL, 0, 279 CTL_KERN, KERN_SYSVIPC, CTL_EOL); 280 sysctl_createv(clog, 0, NULL, NULL, 281 CTLFLAG_PERMANENT|CTLFLAG_READONLY, 282 CTLTYPE_INT, "sysvmsg", 283 SYSCTL_DESCR("System V style message support available"), 284 NULL, 0, &kern_has_sysvmsg, sizeof(int), 285 CTL_KERN, KERN_SYSVIPC, KERN_SYSVIPC_MSG, CTL_EOL); 286 sysctl_createv(clog, 0, NULL, NULL, 287 CTLFLAG_PERMANENT|CTLFLAG_READONLY, 288 CTLTYPE_INT, "sysvsem", 289 SYSCTL_DESCR("System V style semaphore support " 290 "available"), 291 NULL, 0, &kern_has_sysvsem, sizeof(int), 292 CTL_KERN, KERN_SYSVIPC, KERN_SYSVIPC_SEM, CTL_EOL); 293 sysctl_createv(clog, 0, NULL, NULL, 294 CTLFLAG_PERMANENT|CTLFLAG_READONLY, 295 CTLTYPE_INT, "sysvshm", 296 SYSCTL_DESCR("System V style shared memory support " 297 "available"), 298 NULL, 0, &kern_has_sysvshm, sizeof(int), 299 CTL_KERN, KERN_SYSVIPC, KERN_SYSVIPC_SHM, CTL_EOL); 300 sysctl_createv(clog, 0, NULL, NULL, 301 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 302 CTLTYPE_INT, "synchronized_io", 303 SYSCTL_DESCR("Whether the POSIX 1003.1b Synchronized " 304 "I/O Option is available on this system"), 305 NULL, 1, NULL, 0, 306 CTL_KERN, KERN_SYNCHRONIZED_IO, CTL_EOL); 307 sysctl_createv(clog, 0, NULL, NULL, 308 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 309 CTLTYPE_INT, "iov_max", 310 SYSCTL_DESCR("Maximum number of iovec structures per " 311 "process"), 312 NULL, IOV_MAX, NULL, 0, 313 CTL_KERN, KERN_IOV_MAX, CTL_EOL); 314 sysctl_createv(clog, 0, NULL, NULL, 315 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 316 CTLTYPE_INT, "mapped_files", 317 SYSCTL_DESCR("Whether the POSIX 1003.1b Memory Mapped " 318 "Files Option is available on this system"), 319 NULL, 1, NULL, 0, 320 CTL_KERN, KERN_MAPPED_FILES, CTL_EOL); 321 sysctl_createv(clog, 0, NULL, NULL, 322 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 323 CTLTYPE_INT, "memlock", 324 SYSCTL_DESCR("Whether the POSIX 1003.1b Process Memory " 325 "Locking Option is available on this " 326 "system"), 327 NULL, 1, NULL, 0, 328 CTL_KERN, KERN_MEMLOCK, CTL_EOL); 329 sysctl_createv(clog, 0, NULL, NULL, 330 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 331 CTLTYPE_INT, "memlock_range", 332 SYSCTL_DESCR("Whether the POSIX 1003.1b Range Memory " 333 "Locking Option is available on this " 334 "system"), 335 NULL, 1, NULL, 0, 336 CTL_KERN, KERN_MEMLOCK_RANGE, CTL_EOL); 337 sysctl_createv(clog, 0, NULL, NULL, 338 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 339 CTLTYPE_INT, "memory_protection", 340 SYSCTL_DESCR("Whether the POSIX 1003.1b Memory " 341 "Protection Option is available on this " 342 "system"), 343 NULL, 1, NULL, 0, 344 CTL_KERN, KERN_MEMORY_PROTECTION, CTL_EOL); 345 sysctl_createv(clog, 0, NULL, NULL, 346 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 347 CTLTYPE_INT, "login_name_max", 348 SYSCTL_DESCR("Maximum login name length"), 349 NULL, LOGIN_NAME_MAX, NULL, 0, 350 CTL_KERN, KERN_LOGIN_NAME_MAX, CTL_EOL); 351 sysctl_createv(clog, 0, NULL, NULL, 352 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 353 CTLTYPE_STRING, "defcorename", 354 SYSCTL_DESCR("Default core file name"), 355 sysctl_kern_defcorename, 0, defcorename, MAXPATHLEN, 356 CTL_KERN, KERN_DEFCORENAME, CTL_EOL); 357 sysctl_createv(clog, 0, NULL, NULL, 358 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 359 CTLTYPE_INT, "logsigexit", 360 SYSCTL_DESCR("Log process exit when caused by signals"), 361 NULL, 0, &kern_logsigexit, 0, 362 CTL_KERN, KERN_LOGSIGEXIT, CTL_EOL); 363 sysctl_createv(clog, 0, NULL, NULL, 364 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 365 CTLTYPE_INT, "fscale", 366 SYSCTL_DESCR("Kernel fixed-point scale factor"), 367 NULL, FSCALE, NULL, 0, 368 CTL_KERN, KERN_FSCALE, CTL_EOL); 369 sysctl_createv(clog, 0, NULL, NULL, 370 CTLFLAG_PERMANENT, 371 CTLTYPE_INT, "ccpu", 372 SYSCTL_DESCR("Scheduler exponential decay value"), 373 NULL, 0, &ccpu, 0, 374 CTL_KERN, KERN_CCPU, CTL_EOL); 375 sysctl_createv(clog, 0, NULL, NULL, 376 CTLFLAG_PERMANENT, 377 CTLTYPE_STRUCT, "cp_time", 378 SYSCTL_DESCR("Clock ticks spent in different CPU states"), 379 sysctl_kern_cptime, 0, NULL, 0, 380 CTL_KERN, KERN_CP_TIME, CTL_EOL); 381 sysctl_createv(clog, 0, NULL, NULL, 382 CTLFLAG_PERMANENT, 383 CTLTYPE_STRUCT, "consdev", 384 SYSCTL_DESCR("Console device"), 385 sysctl_consdev, 0, NULL, sizeof(dev_t), 386 CTL_KERN, KERN_CONSDEV, CTL_EOL); 387 #if NPTY > 0 388 sysctl_createv(clog, 0, NULL, NULL, 389 CTLFLAG_PERMANENT, 390 CTLTYPE_INT, "maxptys", 391 SYSCTL_DESCR("Maximum number of pseudo-ttys"), 392 sysctl_kern_maxptys, 0, NULL, 0, 393 CTL_KERN, KERN_MAXPTYS, CTL_EOL); 394 #endif /* NPTY > 0 */ 395 sysctl_createv(clog, 0, NULL, NULL, 396 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 397 CTLTYPE_INT, "maxphys", 398 SYSCTL_DESCR("Maximum raw I/O transfer size"), 399 NULL, MAXPHYS, NULL, 0, 400 CTL_KERN, KERN_MAXPHYS, CTL_EOL); 401 sysctl_createv(clog, 0, NULL, NULL, 402 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 403 CTLTYPE_INT, "monotonic_clock", 404 SYSCTL_DESCR("Implementation version of the POSIX " 405 "1003.1b Monotonic Clock Option"), 406 /* XXX _POSIX_VERSION */ 407 NULL, _POSIX_MONOTONIC_CLOCK, NULL, 0, 408 CTL_KERN, KERN_MONOTONIC_CLOCK, CTL_EOL); 409 sysctl_createv(clog, 0, NULL, NULL, 410 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 411 CTLTYPE_INT, "labelsector", 412 SYSCTL_DESCR("Sector number containing the disklabel"), 413 NULL, LABELSECTOR, NULL, 0, 414 CTL_KERN, KERN_LABELSECTOR, CTL_EOL); 415 sysctl_createv(clog, 0, NULL, NULL, 416 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 417 CTLTYPE_INT, "labeloffset", 418 SYSCTL_DESCR("Offset of the disklabel within the " 419 "sector"), 420 NULL, LABELOFFSET, NULL, 0, 421 CTL_KERN, KERN_LABELOFFSET, CTL_EOL); 422 sysctl_createv(clog, 0, NULL, NULL, 423 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 424 CTLTYPE_INT, "labelusesmbr", 425 SYSCTL_DESCR("disklabel is inside MBR partition"), 426 NULL, LABELUSESMBR, NULL, 0, 427 CTL_KERN, CTL_CREATE, CTL_EOL); 428 sysctl_createv(clog, 0, NULL, NULL, 429 CTLFLAG_PERMANENT, 430 CTLTYPE_NODE, "lwp", 431 SYSCTL_DESCR("System-wide LWP information"), 432 sysctl_kern_lwp, 0, NULL, 0, 433 CTL_KERN, KERN_LWP, CTL_EOL); 434 sysctl_createv(clog, 0, NULL, NULL, 435 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 436 CTLTYPE_INT, "forkfsleep", 437 SYSCTL_DESCR("Milliseconds to sleep on fork failure due " 438 "to process limits"), 439 sysctl_kern_forkfsleep, 0, NULL, 0, 440 CTL_KERN, KERN_FORKFSLEEP, CTL_EOL); 441 sysctl_createv(clog, 0, NULL, NULL, 442 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 443 CTLTYPE_INT, "posix_threads", 444 SYSCTL_DESCR("Version of IEEE Std 1003.1 and its " 445 "Threads option to which the system " 446 "attempts to conform"), 447 /* XXX _POSIX_VERSION */ 448 NULL, _POSIX_THREADS, NULL, 0, 449 CTL_KERN, KERN_POSIX_THREADS, CTL_EOL); 450 sysctl_createv(clog, 0, NULL, NULL, 451 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 452 CTLTYPE_INT, "posix_semaphores", 453 SYSCTL_DESCR("Version of IEEE Std 1003.1 and its " 454 "Semaphores option to which the system " 455 "attempts to conform"), NULL, 456 200112, NULL, 0, 457 CTL_KERN, KERN_POSIX_SEMAPHORES, CTL_EOL); 458 sysctl_createv(clog, 0, NULL, NULL, 459 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 460 CTLTYPE_INT, "posix_barriers", 461 SYSCTL_DESCR("Version of IEEE Std 1003.1 and its " 462 "Barriers option to which the system " 463 "attempts to conform"), 464 /* XXX _POSIX_VERSION */ 465 NULL, _POSIX_BARRIERS, NULL, 0, 466 CTL_KERN, KERN_POSIX_BARRIERS, CTL_EOL); 467 sysctl_createv(clog, 0, NULL, NULL, 468 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 469 CTLTYPE_INT, "posix_timers", 470 SYSCTL_DESCR("Version of IEEE Std 1003.1 and its " 471 "Timers option to which the system " 472 "attempts to conform"), 473 /* XXX _POSIX_VERSION */ 474 NULL, _POSIX_TIMERS, NULL, 0, 475 CTL_KERN, KERN_POSIX_TIMERS, CTL_EOL); 476 sysctl_createv(clog, 0, NULL, NULL, 477 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 478 CTLTYPE_INT, "posix_spin_locks", 479 SYSCTL_DESCR("Version of IEEE Std 1003.1 and its Spin " 480 "Locks option to which the system attempts " 481 "to conform"), 482 /* XXX _POSIX_VERSION */ 483 NULL, _POSIX_SPIN_LOCKS, NULL, 0, 484 CTL_KERN, KERN_POSIX_SPIN_LOCKS, CTL_EOL); 485 sysctl_createv(clog, 0, NULL, NULL, 486 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 487 CTLTYPE_INT, "posix_reader_writer_locks", 488 SYSCTL_DESCR("Version of IEEE Std 1003.1 and its " 489 "Read-Write Locks option to which the " 490 "system attempts to conform"), 491 /* XXX _POSIX_VERSION */ 492 NULL, _POSIX_READER_WRITER_LOCKS, NULL, 0, 493 CTL_KERN, KERN_POSIX_READER_WRITER_LOCKS, CTL_EOL); 494 sysctl_createv(clog, 0, NULL, NULL, 495 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 496 CTLTYPE_INT, "dump_on_panic", 497 SYSCTL_DESCR("Perform a crash dump on system panic"), 498 NULL, 0, &dumponpanic, 0, 499 CTL_KERN, KERN_DUMP_ON_PANIC, CTL_EOL); 500 #ifdef DIAGNOSTIC 501 sysctl_createv(clog, 0, NULL, NULL, 502 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 503 CTLTYPE_INT, "panic_now", 504 SYSCTL_DESCR("Trigger a panic"), 505 sysctl_kern_trigger_panic, 0, NULL, 0, 506 CTL_KERN, CTL_CREATE, CTL_EOL); 507 #endif 508 sysctl_createv(clog, 0, NULL, NULL, 509 CTLFLAG_PERMANENT, 510 CTLTYPE_INT, "root_partition", 511 SYSCTL_DESCR("Root partition on the root device"), 512 sysctl_kern_root_partition, 0, NULL, 0, 513 CTL_KERN, KERN_ROOT_PARTITION, CTL_EOL); 514 sysctl_createv(clog, 0, NULL, NULL, 515 CTLFLAG_PERMANENT, 516 CTLTYPE_STRUCT, "drivers", 517 SYSCTL_DESCR("List of all drivers with block and " 518 "character device numbers"), 519 sysctl_kern_drivers, 0, NULL, 0, 520 CTL_KERN, KERN_DRIVERS, CTL_EOL); 521 sysctl_createv(clog, 0, NULL, NULL, 522 CTLFLAG_PERMANENT, 523 CTLTYPE_STRUCT, "cp_id", 524 SYSCTL_DESCR("Mapping of CPU number to CPU id"), 525 sysctl_kern_cpid, 0, NULL, 0, 526 CTL_KERN, KERN_CP_ID, CTL_EOL); 527 sysctl_createv(clog, 0, NULL, &rnode, 528 CTLFLAG_PERMANENT, 529 CTLTYPE_NODE, "coredump", 530 SYSCTL_DESCR("Coredump settings."), 531 NULL, 0, NULL, 0, 532 CTL_KERN, CTL_CREATE, CTL_EOL); 533 sysctl_createv(clog, 0, &rnode, &rnode, 534 CTLFLAG_PERMANENT, 535 CTLTYPE_NODE, "setid", 536 SYSCTL_DESCR("Set-id processes' coredump settings."), 537 NULL, 0, NULL, 0, 538 CTL_CREATE, CTL_EOL); 539 sysctl_createv(clog, 0, &rnode, NULL, 540 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 541 CTLTYPE_INT, "dump", 542 SYSCTL_DESCR("Allow set-id processes to dump core."), 543 sysctl_security_setidcore, 0, &security_setidcore_dump, 544 sizeof(security_setidcore_dump), 545 CTL_CREATE, CTL_EOL); 546 sysctl_createv(clog, 0, &rnode, NULL, 547 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 548 CTLTYPE_STRING, "path", 549 SYSCTL_DESCR("Path pattern for set-id coredumps."), 550 sysctl_security_setidcorename, 0, 551 security_setidcore_path, 552 sizeof(security_setidcore_path), 553 CTL_CREATE, CTL_EOL); 554 sysctl_createv(clog, 0, &rnode, NULL, 555 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 556 CTLTYPE_INT, "owner", 557 SYSCTL_DESCR("Owner id for set-id processes' cores."), 558 sysctl_security_setidcore, 0, &security_setidcore_owner, 559 0, 560 CTL_CREATE, CTL_EOL); 561 sysctl_createv(clog, 0, &rnode, NULL, 562 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 563 CTLTYPE_INT, "group", 564 SYSCTL_DESCR("Group id for set-id processes' cores."), 565 sysctl_security_setidcore, 0, &security_setidcore_group, 566 0, 567 CTL_CREATE, CTL_EOL); 568 sysctl_createv(clog, 0, &rnode, NULL, 569 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 570 CTLTYPE_INT, "mode", 571 SYSCTL_DESCR("Mode for set-id processes' cores."), 572 sysctl_security_setidcore, 0, &security_setidcore_mode, 573 0, 574 CTL_CREATE, CTL_EOL); 575 sysctl_createv(clog, 0, NULL, NULL, 576 CTLFLAG_IMMEDIATE|CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 577 CTLTYPE_INT, "no_sa_support", 578 SYSCTL_DESCR("0 if the kernel supports SA, otherwise " 579 "it doesn't"), 580 NULL, 1, NULL, 0, 581 CTL_KERN, CTL_CREATE, CTL_EOL); 582 sysctl_createv(clog, 0, NULL, NULL, 583 CTLFLAG_PERMANENT, 584 CTLTYPE_STRING, "configname", 585 SYSCTL_DESCR("Name of config file"), 586 NULL, 0, __UNCONST(kernel_ident), 0, 587 CTL_KERN, CTL_CREATE, CTL_EOL); 588 sysctl_createv(clog, 0, NULL, NULL, 589 CTLFLAG_PERMANENT, 590 CTLTYPE_STRING, "buildinfo", 591 SYSCTL_DESCR("Information from build environment"), 592 NULL, 0, __UNCONST(buildinfo), 0, 593 CTL_KERN, CTL_CREATE, CTL_EOL); 594 595 /* kern.posix. */ 596 sysctl_createv(clog, 0, NULL, &rnode, 597 CTLFLAG_PERMANENT, 598 CTLTYPE_NODE, "posix", 599 SYSCTL_DESCR("POSIX options"), 600 NULL, 0, NULL, 0, 601 CTL_KERN, CTL_CREATE, CTL_EOL); 602 sysctl_createv(clog, 0, &rnode, NULL, 603 CTLFLAG_PERMANENT | CTLFLAG_READWRITE, 604 CTLTYPE_INT, "semmax", 605 SYSCTL_DESCR("Maximal number of semaphores"), 606 NULL, 0, &ksem_max, 0, 607 CTL_CREATE, CTL_EOL); 608 } 609 610 SYSCTL_SETUP(sysctl_hw_setup, "sysctl hw subtree setup") 611 { 612 u_int u; 613 u_quad_t q; 614 const char *model = cpu_getmodel(); 615 616 sysctl_createv(clog, 0, NULL, NULL, 617 CTLFLAG_PERMANENT, 618 CTLTYPE_STRING, "machine", 619 SYSCTL_DESCR("Machine class"), 620 NULL, 0, machine, 0, 621 CTL_HW, HW_MACHINE, CTL_EOL); 622 sysctl_createv(clog, 0, NULL, NULL, 623 CTLFLAG_PERMANENT, 624 CTLTYPE_STRING, "model", 625 SYSCTL_DESCR("Machine model"), 626 NULL, 0, __UNCONST(model), 0, 627 CTL_HW, HW_MODEL, CTL_EOL); 628 sysctl_createv(clog, 0, NULL, NULL, 629 CTLFLAG_PERMANENT, 630 CTLTYPE_INT, "ncpu", 631 SYSCTL_DESCR("Number of CPUs configured"), 632 NULL, 0, &ncpu, 0, 633 CTL_HW, HW_NCPU, CTL_EOL); 634 sysctl_createv(clog, 0, NULL, NULL, 635 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 636 CTLTYPE_INT, "byteorder", 637 SYSCTL_DESCR("System byte order"), 638 NULL, BYTE_ORDER, NULL, 0, 639 CTL_HW, HW_BYTEORDER, CTL_EOL); 640 u = ((u_int)physmem > (UINT_MAX / PAGE_SIZE)) ? 641 UINT_MAX : physmem * PAGE_SIZE; 642 sysctl_createv(clog, 0, NULL, NULL, 643 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 644 CTLTYPE_INT, "physmem", 645 SYSCTL_DESCR("Bytes of physical memory"), 646 NULL, u, NULL, 0, 647 CTL_HW, HW_PHYSMEM, CTL_EOL); 648 sysctl_createv(clog, 0, NULL, NULL, 649 CTLFLAG_PERMANENT, 650 CTLTYPE_INT, "usermem", 651 SYSCTL_DESCR("Bytes of non-kernel memory"), 652 sysctl_hw_usermem, 0, NULL, 0, 653 CTL_HW, HW_USERMEM, CTL_EOL); 654 sysctl_createv(clog, 0, NULL, NULL, 655 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 656 CTLTYPE_INT, "pagesize", 657 SYSCTL_DESCR("Software page size"), 658 NULL, PAGE_SIZE, NULL, 0, 659 CTL_HW, HW_PAGESIZE, CTL_EOL); 660 sysctl_createv(clog, 0, NULL, NULL, 661 CTLFLAG_PERMANENT, 662 CTLTYPE_STRING, "machine_arch", 663 SYSCTL_DESCR("Machine CPU class"), 664 NULL, 0, machine_arch, 0, 665 CTL_HW, HW_MACHINE_ARCH, CTL_EOL); 666 sysctl_createv(clog, 0, NULL, NULL, 667 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 668 CTLTYPE_INT, "alignbytes", 669 SYSCTL_DESCR("Alignment constraint for all possible " 670 "data types"), 671 NULL, ALIGNBYTES, NULL, 0, 672 CTL_HW, HW_ALIGNBYTES, CTL_EOL); 673 sysctl_createv(clog, 0, NULL, NULL, 674 CTLFLAG_PERMANENT|CTLFLAG_READWRITE|CTLFLAG_HEX, 675 CTLTYPE_STRING, "cnmagic", 676 SYSCTL_DESCR("Console magic key sequence"), 677 sysctl_hw_cnmagic, 0, NULL, CNS_LEN, 678 CTL_HW, HW_CNMAGIC, CTL_EOL); 679 q = (u_quad_t)physmem * PAGE_SIZE; 680 sysctl_createv(clog, 0, NULL, NULL, 681 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 682 CTLTYPE_QUAD, "physmem64", 683 SYSCTL_DESCR("Bytes of physical memory"), 684 NULL, q, NULL, 0, 685 CTL_HW, HW_PHYSMEM64, CTL_EOL); 686 sysctl_createv(clog, 0, NULL, NULL, 687 CTLFLAG_PERMANENT, 688 CTLTYPE_QUAD, "usermem64", 689 SYSCTL_DESCR("Bytes of non-kernel memory"), 690 sysctl_hw_usermem, 0, NULL, 0, 691 CTL_HW, HW_USERMEM64, CTL_EOL); 692 sysctl_createv(clog, 0, NULL, NULL, 693 CTLFLAG_PERMANENT, 694 CTLTYPE_INT, "ncpuonline", 695 SYSCTL_DESCR("Number of CPUs online"), 696 NULL, 0, &ncpuonline, 0, 697 CTL_HW, HW_NCPUONLINE, CTL_EOL); 698 } 699 700 #ifdef DEBUG 701 /* 702 * Debugging related system variables. 703 */ 704 struct ctldebug /* debug0, */ /* debug1, */ debug2, debug3, debug4; 705 struct ctldebug debug5, debug6, debug7, debug8, debug9; 706 struct ctldebug debug10, debug11, debug12, debug13, debug14; 707 struct ctldebug debug15, debug16, debug17, debug18, debug19; 708 static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = { 709 &debug0, &debug1, &debug2, &debug3, &debug4, 710 &debug5, &debug6, &debug7, &debug8, &debug9, 711 &debug10, &debug11, &debug12, &debug13, &debug14, 712 &debug15, &debug16, &debug17, &debug18, &debug19, 713 }; 714 715 /* 716 * this setup routine is a replacement for debug_sysctl() 717 * 718 * note that it creates several nodes per defined debug variable 719 */ 720 SYSCTL_SETUP(sysctl_debug_setup, "sysctl debug subtree setup") 721 { 722 struct ctldebug *cdp; 723 char nodename[20]; 724 int i; 725 726 /* 727 * two ways here: 728 * 729 * the "old" way (debug.name -> value) which was emulated by 730 * the sysctl(8) binary 731 * 732 * the new way, which the sysctl(8) binary was actually using 733 734 node debug 735 node debug.0 736 string debug.0.name 737 int debug.0.value 738 int debug.name 739 740 */ 741 742 for (i = 0; i < CTL_DEBUG_MAXID; i++) { 743 cdp = debugvars[i]; 744 if (cdp->debugname == NULL || cdp->debugvar == NULL) 745 continue; 746 747 snprintf(nodename, sizeof(nodename), "debug%d", i); 748 sysctl_createv(clog, 0, NULL, NULL, 749 CTLFLAG_PERMANENT|CTLFLAG_HIDDEN, 750 CTLTYPE_NODE, nodename, NULL, 751 NULL, 0, NULL, 0, 752 CTL_DEBUG, i, CTL_EOL); 753 sysctl_createv(clog, 0, NULL, NULL, 754 CTLFLAG_PERMANENT|CTLFLAG_HIDDEN, 755 CTLTYPE_STRING, "name", NULL, 756 /*XXXUNCONST*/ 757 NULL, 0, __UNCONST(cdp->debugname), 0, 758 CTL_DEBUG, i, CTL_DEBUG_NAME, CTL_EOL); 759 sysctl_createv(clog, 0, NULL, NULL, 760 CTLFLAG_PERMANENT|CTLFLAG_HIDDEN, 761 CTLTYPE_INT, "value", NULL, 762 NULL, 0, cdp->debugvar, 0, 763 CTL_DEBUG, i, CTL_DEBUG_VALUE, CTL_EOL); 764 sysctl_createv(clog, 0, NULL, NULL, 765 CTLFLAG_PERMANENT, 766 CTLTYPE_INT, cdp->debugname, NULL, 767 NULL, 0, cdp->debugvar, 0, 768 CTL_DEBUG, CTL_CREATE, CTL_EOL); 769 } 770 } 771 #endif /* DEBUG */ 772 773 /* 774 * ******************************************************************** 775 * section 2: private node-specific helper routines. 776 * ******************************************************************** 777 */ 778 779 #ifdef DIAGNOSTIC 780 static int 781 sysctl_kern_trigger_panic(SYSCTLFN_ARGS) 782 { 783 int newtrig, error; 784 struct sysctlnode node; 785 786 newtrig = 0; 787 node = *rnode; 788 node.sysctl_data = &newtrig; 789 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 790 if (error || newp == NULL) 791 return (error); 792 793 if (newtrig != 0) 794 panic("Panic triggered"); 795 796 return (error); 797 } 798 #endif 799 800 /* 801 * sysctl helper routine for kern.maxvnodes. Drain vnodes if 802 * new value is lower than desiredvnodes and then calls reinit 803 * routines that needs to adjust to the new value. 804 */ 805 static int 806 sysctl_kern_maxvnodes(SYSCTLFN_ARGS) 807 { 808 int error, new_vnodes, old_vnodes, new_max; 809 struct sysctlnode node; 810 811 new_vnodes = desiredvnodes; 812 node = *rnode; 813 node.sysctl_data = &new_vnodes; 814 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 815 if (error || newp == NULL) 816 return (error); 817 818 /* 819 * sysctl passes down unsigned values, require them 820 * to be positive 821 */ 822 if (new_vnodes <= 0) 823 return (EINVAL); 824 825 /* Limits: 75% of kmem and physical memory. */ 826 new_max = calc_cache_size(vmem_size(kmem_arena, VMEM_FREE|VMEM_ALLOC), 827 75, 75) / VNODE_COST; 828 if (new_vnodes > new_max) 829 new_vnodes = new_max; 830 831 old_vnodes = desiredvnodes; 832 desiredvnodes = new_vnodes; 833 error = vfs_drainvnodes(new_vnodes); 834 if (error) { 835 desiredvnodes = old_vnodes; 836 return (error); 837 } 838 vfs_reinit(); 839 nchreinit(); 840 841 return (0); 842 } 843 844 /* 845 * sysctl helper routine for rtc_offset - set time after changes 846 */ 847 static int 848 sysctl_kern_rtc_offset(SYSCTLFN_ARGS) 849 { 850 struct timespec ts, delta; 851 int error, new_rtc_offset; 852 struct sysctlnode node; 853 854 new_rtc_offset = rtc_offset; 855 node = *rnode; 856 node.sysctl_data = &new_rtc_offset; 857 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 858 if (error || newp == NULL) 859 return (error); 860 861 if (kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_TIME, 862 KAUTH_REQ_SYSTEM_TIME_RTCOFFSET, 863 KAUTH_ARG(new_rtc_offset), NULL, NULL)) 864 return (EPERM); 865 if (rtc_offset == new_rtc_offset) 866 return (0); 867 868 /* if we change the offset, adjust the time */ 869 nanotime(&ts); 870 delta.tv_sec = 60 * (new_rtc_offset - rtc_offset); 871 delta.tv_nsec = 0; 872 timespecadd(&ts, &delta, &ts); 873 rtc_offset = new_rtc_offset; 874 return (settime(l->l_proc, &ts)); 875 } 876 877 /* 878 * sysctl helper routine for kern.maxproc. Ensures that the new 879 * values are not too low or too high. 880 */ 881 static int 882 sysctl_kern_maxproc(SYSCTLFN_ARGS) 883 { 884 int error, nmaxproc; 885 struct sysctlnode node; 886 887 nmaxproc = maxproc; 888 node = *rnode; 889 node.sysctl_data = &nmaxproc; 890 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 891 if (error || newp == NULL) 892 return (error); 893 894 if (nmaxproc < 0 || nmaxproc >= PID_MAX) 895 return (EINVAL); 896 #ifdef __HAVE_CPU_MAXPROC 897 if (nmaxproc > cpu_maxproc()) 898 return (EINVAL); 899 #endif 900 maxproc = nmaxproc; 901 902 return (0); 903 } 904 905 /* 906 * sysctl helper function for kern.hostid. The hostid is a long, but 907 * we export it as an int, so we need to give it a little help. 908 */ 909 static int 910 sysctl_kern_hostid(SYSCTLFN_ARGS) 911 { 912 int error, inthostid; 913 struct sysctlnode node; 914 915 inthostid = hostid; /* XXX assumes sizeof int <= sizeof long */ 916 node = *rnode; 917 node.sysctl_data = &inthostid; 918 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 919 if (error || newp == NULL) 920 return (error); 921 922 hostid = (unsigned)inthostid; 923 924 return (0); 925 } 926 927 /* 928 * sysctl helper routine for kern.defcorename. In the case of a new 929 * string being assigned, check that it's not a zero-length string. 930 * (XXX the check in -current doesn't work, but do we really care?) 931 */ 932 static int 933 sysctl_kern_defcorename(SYSCTLFN_ARGS) 934 { 935 int error; 936 char *newcorename; 937 struct sysctlnode node; 938 939 newcorename = PNBUF_GET(); 940 node = *rnode; 941 node.sysctl_data = &newcorename[0]; 942 memcpy(node.sysctl_data, rnode->sysctl_data, MAXPATHLEN); 943 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 944 if (error || newp == NULL) { 945 goto done; 946 } 947 948 /* 949 * when sysctl_lookup() deals with a string, it's guaranteed 950 * to come back nul terminated. So there. :) 951 */ 952 if (strlen(newcorename) == 0) { 953 error = EINVAL; 954 } else { 955 memcpy(rnode->sysctl_data, node.sysctl_data, MAXPATHLEN); 956 error = 0; 957 } 958 done: 959 PNBUF_PUT(newcorename); 960 return error; 961 } 962 963 /* 964 * sysctl helper routine for kern.cp_time node. Adds up cpu time 965 * across all cpus. 966 */ 967 static int 968 sysctl_kern_cptime(SYSCTLFN_ARGS) 969 { 970 struct sysctlnode node = *rnode; 971 uint64_t *cp_time = NULL; 972 int error, n = ncpu, i; 973 struct cpu_info *ci; 974 CPU_INFO_ITERATOR cii; 975 976 /* 977 * if you specifically pass a buffer that is the size of the 978 * sum, or if you are probing for the size, you get the "sum" 979 * of cp_time (and the size thereof) across all processors. 980 * 981 * alternately, you can pass an additional mib number and get 982 * cp_time for that particular processor. 983 */ 984 switch (namelen) { 985 case 0: 986 if (*oldlenp == sizeof(uint64_t) * CPUSTATES || oldp == NULL) { 987 node.sysctl_size = sizeof(uint64_t) * CPUSTATES; 988 n = -1; /* SUM */ 989 } 990 else { 991 node.sysctl_size = n * sizeof(uint64_t) * CPUSTATES; 992 n = -2; /* ALL */ 993 } 994 break; 995 case 1: 996 if (name[0] < 0 || name[0] >= n) 997 return (ENOENT); /* ENOSUCHPROCESSOR */ 998 node.sysctl_size = sizeof(uint64_t) * CPUSTATES; 999 n = name[0]; 1000 /* 1001 * adjust these so that sysctl_lookup() will be happy 1002 */ 1003 name++; 1004 namelen--; 1005 break; 1006 default: 1007 return (EINVAL); 1008 } 1009 1010 cp_time = kmem_alloc(node.sysctl_size, KM_SLEEP); 1011 if (cp_time == NULL) 1012 return (ENOMEM); 1013 node.sysctl_data = cp_time; 1014 memset(cp_time, 0, node.sysctl_size); 1015 1016 for (CPU_INFO_FOREACH(cii, ci)) { 1017 if (n <= 0) { 1018 for (i = 0; i < CPUSTATES; i++) { 1019 cp_time[i] += ci->ci_schedstate.spc_cp_time[i]; 1020 } 1021 } 1022 /* 1023 * if a specific processor was requested and we just 1024 * did it, we're done here 1025 */ 1026 if (n == 0) 1027 break; 1028 /* 1029 * if doing "all", skip to next cp_time set for next processor 1030 */ 1031 if (n == -2) 1032 cp_time += CPUSTATES; 1033 /* 1034 * if we're doing a specific processor, we're one 1035 * processor closer 1036 */ 1037 if (n > 0) 1038 n--; 1039 } 1040 1041 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1042 kmem_free(node.sysctl_data, node.sysctl_size); 1043 return (error); 1044 } 1045 1046 #if NPTY > 0 1047 /* 1048 * sysctl helper routine for kern.maxptys. Ensures that any new value 1049 * is acceptable to the pty subsystem. 1050 */ 1051 static int 1052 sysctl_kern_maxptys(SYSCTLFN_ARGS) 1053 { 1054 int pty_maxptys(int, int); /* defined in kern/tty_pty.c */ 1055 int error, xmax; 1056 struct sysctlnode node; 1057 1058 /* get current value of maxptys */ 1059 xmax = pty_maxptys(0, 0); 1060 1061 node = *rnode; 1062 node.sysctl_data = &xmax; 1063 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1064 if (error || newp == NULL) 1065 return (error); 1066 1067 if (xmax != pty_maxptys(xmax, 1)) 1068 return (EINVAL); 1069 1070 return (0); 1071 } 1072 #endif /* NPTY > 0 */ 1073 1074 /* 1075 * sysctl helper routine to do kern.lwp.* work. 1076 */ 1077 static int 1078 sysctl_kern_lwp(SYSCTLFN_ARGS) 1079 { 1080 struct kinfo_lwp klwp; 1081 struct proc *p; 1082 struct lwp *l2, *l3; 1083 char *where, *dp; 1084 int pid, elem_size, elem_count; 1085 int buflen, needed, error; 1086 bool gotit; 1087 1088 if (namelen == 1 && name[0] == CTL_QUERY) 1089 return (sysctl_query(SYSCTLFN_CALL(rnode))); 1090 1091 dp = where = oldp; 1092 buflen = where != NULL ? *oldlenp : 0; 1093 error = needed = 0; 1094 1095 if (newp != NULL || namelen != 3) 1096 return (EINVAL); 1097 pid = name[0]; 1098 elem_size = name[1]; 1099 elem_count = name[2]; 1100 1101 sysctl_unlock(); 1102 if (pid == -1) { 1103 mutex_enter(proc_lock); 1104 PROCLIST_FOREACH(p, &allproc) { 1105 /* Grab a hold on the process. */ 1106 if (!rw_tryenter(&p->p_reflock, RW_READER)) { 1107 continue; 1108 } 1109 mutex_exit(proc_lock); 1110 1111 mutex_enter(p->p_lock); 1112 LIST_FOREACH(l2, &p->p_lwps, l_sibling) { 1113 if (buflen >= elem_size && elem_count > 0) { 1114 lwp_lock(l2); 1115 fill_lwp(l2, &klwp); 1116 lwp_unlock(l2); 1117 mutex_exit(p->p_lock); 1118 1119 /* 1120 * Copy out elem_size, but not 1121 * larger than the size of a 1122 * struct kinfo_proc2. 1123 */ 1124 error = dcopyout(l, &klwp, dp, 1125 min(sizeof(klwp), elem_size)); 1126 if (error) { 1127 rw_exit(&p->p_reflock); 1128 goto cleanup; 1129 } 1130 mutex_enter(p->p_lock); 1131 LIST_FOREACH(l3, &p->p_lwps, 1132 l_sibling) { 1133 if (l2 == l3) 1134 break; 1135 } 1136 if (l3 == NULL) { 1137 mutex_exit(p->p_lock); 1138 rw_exit(&p->p_reflock); 1139 error = EAGAIN; 1140 goto cleanup; 1141 } 1142 dp += elem_size; 1143 buflen -= elem_size; 1144 elem_count--; 1145 } 1146 needed += elem_size; 1147 } 1148 mutex_exit(p->p_lock); 1149 1150 /* Drop reference to process. */ 1151 mutex_enter(proc_lock); 1152 rw_exit(&p->p_reflock); 1153 } 1154 mutex_exit(proc_lock); 1155 } else { 1156 mutex_enter(proc_lock); 1157 p = proc_find(pid); 1158 if (p == NULL) { 1159 error = ESRCH; 1160 mutex_exit(proc_lock); 1161 goto cleanup; 1162 } 1163 /* Grab a hold on the process. */ 1164 gotit = rw_tryenter(&p->p_reflock, RW_READER); 1165 mutex_exit(proc_lock); 1166 if (!gotit) { 1167 error = ESRCH; 1168 goto cleanup; 1169 } 1170 1171 mutex_enter(p->p_lock); 1172 LIST_FOREACH(l2, &p->p_lwps, l_sibling) { 1173 if (buflen >= elem_size && elem_count > 0) { 1174 lwp_lock(l2); 1175 fill_lwp(l2, &klwp); 1176 lwp_unlock(l2); 1177 mutex_exit(p->p_lock); 1178 /* 1179 * Copy out elem_size, but not larger than 1180 * the size of a struct kinfo_proc2. 1181 */ 1182 error = dcopyout(l, &klwp, dp, 1183 min(sizeof(klwp), elem_size)); 1184 if (error) { 1185 rw_exit(&p->p_reflock); 1186 goto cleanup; 1187 } 1188 mutex_enter(p->p_lock); 1189 LIST_FOREACH(l3, &p->p_lwps, l_sibling) { 1190 if (l2 == l3) 1191 break; 1192 } 1193 if (l3 == NULL) { 1194 mutex_exit(p->p_lock); 1195 rw_exit(&p->p_reflock); 1196 error = EAGAIN; 1197 goto cleanup; 1198 } 1199 dp += elem_size; 1200 buflen -= elem_size; 1201 elem_count--; 1202 } 1203 needed += elem_size; 1204 } 1205 mutex_exit(p->p_lock); 1206 1207 /* Drop reference to process. */ 1208 rw_exit(&p->p_reflock); 1209 } 1210 1211 if (where != NULL) { 1212 *oldlenp = dp - where; 1213 if (needed > *oldlenp) { 1214 sysctl_relock(); 1215 return (ENOMEM); 1216 } 1217 } else { 1218 needed += KERN_LWPSLOP; 1219 *oldlenp = needed; 1220 } 1221 error = 0; 1222 cleanup: 1223 sysctl_relock(); 1224 return (error); 1225 } 1226 1227 /* 1228 * sysctl helper routine for kern.forkfsleep node. Ensures that the 1229 * given value is not too large or two small, and is at least one 1230 * timer tick if not zero. 1231 */ 1232 static int 1233 sysctl_kern_forkfsleep(SYSCTLFN_ARGS) 1234 { 1235 /* userland sees value in ms, internally is in ticks */ 1236 extern int forkfsleep; /* defined in kern/kern_fork.c */ 1237 int error, timo, lsleep; 1238 struct sysctlnode node; 1239 1240 lsleep = forkfsleep * 1000 / hz; 1241 node = *rnode; 1242 node.sysctl_data = &lsleep; 1243 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1244 if (error || newp == NULL) 1245 return (error); 1246 1247 /* refuse negative values, and overly 'long time' */ 1248 if (lsleep < 0 || lsleep > MAXSLP * 1000) 1249 return (EINVAL); 1250 1251 timo = mstohz(lsleep); 1252 1253 /* if the interval is >0 ms && <1 tick, use 1 tick */ 1254 if (lsleep != 0 && timo == 0) 1255 forkfsleep = 1; 1256 else 1257 forkfsleep = timo; 1258 1259 return (0); 1260 } 1261 1262 /* 1263 * sysctl helper routine for kern.root_partition 1264 */ 1265 static int 1266 sysctl_kern_root_partition(SYSCTLFN_ARGS) 1267 { 1268 int rootpart = DISKPART(rootdev); 1269 struct sysctlnode node = *rnode; 1270 1271 node.sysctl_data = &rootpart; 1272 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 1273 } 1274 1275 /* 1276 * sysctl helper function for kern.drivers 1277 */ 1278 static int 1279 sysctl_kern_drivers(SYSCTLFN_ARGS) 1280 { 1281 int error; 1282 size_t buflen; 1283 struct kinfo_drivers kd; 1284 char *start, *where; 1285 const char *dname; 1286 int i; 1287 extern struct devsw_conv *devsw_conv; 1288 extern int max_devsw_convs; 1289 1290 start = where = oldp; 1291 buflen = *oldlenp; 1292 if (where == NULL) { 1293 *oldlenp = max_devsw_convs * sizeof kd; 1294 return 0; 1295 } 1296 1297 /* 1298 * An array of kinfo_drivers structures 1299 */ 1300 error = 0; 1301 sysctl_unlock(); 1302 mutex_enter(&device_lock); 1303 for (i = 0; i < max_devsw_convs; i++) { 1304 dname = devsw_conv[i].d_name; 1305 if (dname == NULL) 1306 continue; 1307 if (buflen < sizeof kd) { 1308 error = ENOMEM; 1309 break; 1310 } 1311 memset(&kd, 0, sizeof(kd)); 1312 kd.d_bmajor = devsw_conv[i].d_bmajor; 1313 kd.d_cmajor = devsw_conv[i].d_cmajor; 1314 strlcpy(kd.d_name, dname, sizeof kd.d_name); 1315 mutex_exit(&device_lock); 1316 error = dcopyout(l, &kd, where, sizeof kd); 1317 mutex_enter(&device_lock); 1318 if (error != 0) 1319 break; 1320 buflen -= sizeof kd; 1321 where += sizeof kd; 1322 } 1323 mutex_exit(&device_lock); 1324 sysctl_relock(); 1325 *oldlenp = where - start; 1326 return error; 1327 } 1328 1329 static int 1330 sysctl_security_setidcore(SYSCTLFN_ARGS) 1331 { 1332 int newsize, error; 1333 struct sysctlnode node; 1334 1335 node = *rnode; 1336 node.sysctl_data = &newsize; 1337 newsize = *(int *)rnode->sysctl_data; 1338 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1339 if (error || newp == NULL) 1340 return error; 1341 1342 if (kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_SETIDCORE, 1343 0, NULL, NULL, NULL)) 1344 return (EPERM); 1345 1346 *(int *)rnode->sysctl_data = newsize; 1347 1348 return 0; 1349 } 1350 1351 static int 1352 sysctl_security_setidcorename(SYSCTLFN_ARGS) 1353 { 1354 int error; 1355 char *newsetidcorename; 1356 struct sysctlnode node; 1357 1358 newsetidcorename = PNBUF_GET(); 1359 node = *rnode; 1360 node.sysctl_data = newsetidcorename; 1361 memcpy(node.sysctl_data, rnode->sysctl_data, MAXPATHLEN); 1362 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1363 if (error || newp == NULL) { 1364 goto out; 1365 } 1366 if (kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_SETIDCORE, 1367 0, NULL, NULL, NULL)) { 1368 error = EPERM; 1369 goto out; 1370 } 1371 if (strlen(newsetidcorename) == 0) { 1372 error = EINVAL; 1373 goto out; 1374 } 1375 memcpy(rnode->sysctl_data, node.sysctl_data, MAXPATHLEN); 1376 out: 1377 PNBUF_PUT(newsetidcorename); 1378 return error; 1379 } 1380 1381 /* 1382 * sysctl helper routine for kern.cp_id node. Maps cpus to their 1383 * cpuids. 1384 */ 1385 static int 1386 sysctl_kern_cpid(SYSCTLFN_ARGS) 1387 { 1388 struct sysctlnode node = *rnode; 1389 uint64_t *cp_id = NULL; 1390 int error, n = ncpu; 1391 struct cpu_info *ci; 1392 CPU_INFO_ITERATOR cii; 1393 1394 /* 1395 * Here you may either retrieve a single cpu id or the whole 1396 * set. The size you get back when probing depends on what 1397 * you ask for. 1398 */ 1399 switch (namelen) { 1400 case 0: 1401 node.sysctl_size = n * sizeof(uint64_t); 1402 n = -2; /* ALL */ 1403 break; 1404 case 1: 1405 if (name[0] < 0 || name[0] >= n) 1406 return (ENOENT); /* ENOSUCHPROCESSOR */ 1407 node.sysctl_size = sizeof(uint64_t); 1408 n = name[0]; 1409 /* 1410 * adjust these so that sysctl_lookup() will be happy 1411 */ 1412 name++; 1413 namelen--; 1414 break; 1415 default: 1416 return (EINVAL); 1417 } 1418 1419 cp_id = kmem_alloc(node.sysctl_size, KM_SLEEP); 1420 if (cp_id == NULL) 1421 return (ENOMEM); 1422 node.sysctl_data = cp_id; 1423 memset(cp_id, 0, node.sysctl_size); 1424 1425 for (CPU_INFO_FOREACH(cii, ci)) { 1426 if (n <= 0) 1427 cp_id[0] = cpu_index(ci); 1428 /* 1429 * if a specific processor was requested and we just 1430 * did it, we're done here 1431 */ 1432 if (n == 0) 1433 break; 1434 /* 1435 * if doing "all", skip to next cp_id slot for next processor 1436 */ 1437 if (n == -2) 1438 cp_id++; 1439 /* 1440 * if we're doing a specific processor, we're one 1441 * processor closer 1442 */ 1443 if (n > 0) 1444 n--; 1445 } 1446 1447 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1448 kmem_free(node.sysctl_data, node.sysctl_size); 1449 return (error); 1450 } 1451 1452 /* 1453 * sysctl helper routine for hw.usermem and hw.usermem64. Values are 1454 * calculate on the fly taking into account integer overflow and the 1455 * current wired count. 1456 */ 1457 static int 1458 sysctl_hw_usermem(SYSCTLFN_ARGS) 1459 { 1460 u_int ui; 1461 u_quad_t uq; 1462 struct sysctlnode node; 1463 1464 node = *rnode; 1465 switch (rnode->sysctl_num) { 1466 case HW_USERMEM: 1467 if ((ui = physmem - uvmexp.wired) > (UINT_MAX / PAGE_SIZE)) 1468 ui = UINT_MAX; 1469 else 1470 ui *= PAGE_SIZE; 1471 node.sysctl_data = &ui; 1472 break; 1473 case HW_USERMEM64: 1474 uq = (u_quad_t)(physmem - uvmexp.wired) * PAGE_SIZE; 1475 node.sysctl_data = &uq; 1476 break; 1477 default: 1478 return (EINVAL); 1479 } 1480 1481 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 1482 } 1483 1484 /* 1485 * sysctl helper routine for kern.cnmagic node. Pulls the old value 1486 * out, encoded, and stuffs the new value in for decoding. 1487 */ 1488 static int 1489 sysctl_hw_cnmagic(SYSCTLFN_ARGS) 1490 { 1491 char magic[CNS_LEN]; 1492 int error; 1493 struct sysctlnode node; 1494 1495 if (oldp) 1496 cn_get_magic(magic, CNS_LEN); 1497 node = *rnode; 1498 node.sysctl_data = &magic[0]; 1499 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1500 if (error || newp == NULL) 1501 return (error); 1502 1503 return (cn_set_magic(magic)); 1504 } 1505 1506 /* 1507 * ******************************************************************** 1508 * section 3: public helper routines that are used for more than one 1509 * node 1510 * ******************************************************************** 1511 */ 1512 1513 /* 1514 * sysctl helper routine for the kern.root_device node and some ports' 1515 * machdep.root_device nodes. 1516 */ 1517 int 1518 sysctl_root_device(SYSCTLFN_ARGS) 1519 { 1520 struct sysctlnode node; 1521 1522 node = *rnode; 1523 node.sysctl_data = __UNCONST(device_xname(root_device)); 1524 node.sysctl_size = strlen(device_xname(root_device)) + 1; 1525 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 1526 } 1527 1528 /* 1529 * sysctl helper routine for kern.consdev, dependent on the current 1530 * state of the console. Also used for machdep.console_device on some 1531 * ports. 1532 */ 1533 int 1534 sysctl_consdev(SYSCTLFN_ARGS) 1535 { 1536 dev_t consdev; 1537 uint32_t oconsdev; 1538 struct sysctlnode node; 1539 1540 if (cn_tab != NULL) 1541 consdev = cn_tab->cn_dev; 1542 else 1543 consdev = NODEV; 1544 node = *rnode; 1545 switch (*oldlenp) { 1546 case sizeof(consdev): 1547 node.sysctl_data = &consdev; 1548 node.sysctl_size = sizeof(consdev); 1549 break; 1550 case sizeof(oconsdev): 1551 oconsdev = (uint32_t)consdev; 1552 node.sysctl_data = &oconsdev; 1553 node.sysctl_size = sizeof(oconsdev); 1554 break; 1555 default: 1556 return EINVAL; 1557 } 1558 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 1559 } 1560 1561 /* 1562 * ******************************************************************** 1563 * section 4: support for some helpers 1564 * ******************************************************************** 1565 */ 1566 1567 1568 /* 1569 * Fill in a kinfo_lwp structure for the specified lwp. 1570 */ 1571 static void 1572 fill_lwp(struct lwp *l, struct kinfo_lwp *kl) 1573 { 1574 struct proc *p = l->l_proc; 1575 struct timeval tv; 1576 1577 KASSERT(lwp_locked(l, NULL)); 1578 1579 memset(kl, 0, sizeof(*kl)); 1580 1581 kl->l_forw = 0; 1582 kl->l_back = 0; 1583 kl->l_laddr = PTRTOUINT64(l); 1584 kl->l_addr = PTRTOUINT64(l->l_addr); 1585 kl->l_stat = l->l_stat; 1586 kl->l_lid = l->l_lid; 1587 kl->l_flag = L_INMEM; 1588 kl->l_flag |= sysctl_map_flags(sysctl_lwpprflagmap, l->l_prflag); 1589 kl->l_flag |= sysctl_map_flags(sysctl_lwpflagmap, l->l_flag); 1590 1591 kl->l_swtime = l->l_swtime; 1592 kl->l_slptime = l->l_slptime; 1593 if (l->l_stat == LSONPROC) 1594 kl->l_schedflags = l->l_cpu->ci_schedstate.spc_flags; 1595 else 1596 kl->l_schedflags = 0; 1597 kl->l_priority = lwp_eprio(l); 1598 kl->l_usrpri = l->l_priority; 1599 if (l->l_wchan) 1600 strncpy(kl->l_wmesg, l->l_wmesg, sizeof(kl->l_wmesg)); 1601 kl->l_wchan = PTRTOUINT64(l->l_wchan); 1602 kl->l_cpuid = cpu_index(l->l_cpu); 1603 bintime2timeval(&l->l_rtime, &tv); 1604 kl->l_rtime_sec = tv.tv_sec; 1605 kl->l_rtime_usec = tv.tv_usec; 1606 kl->l_cpticks = l->l_cpticks; 1607 kl->l_pctcpu = l->l_pctcpu; 1608 kl->l_pid = p->p_pid; 1609 if (l->l_name == NULL) 1610 kl->l_name[0] = '\0'; 1611 else 1612 strlcpy(kl->l_name, l->l_name, sizeof(kl->l_name)); 1613 } 1614
Indexes created Wed Oct 01 15:09:59 GMT 2025