1 /* $NetBSD: init_sysctl.c,v 1.213 2017/06/01 02:45:13 chs Exp $ */ 2 3 /*- 4 * Copyright (c) 2003, 2007, 2008, 2009 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Andrew Brown, and by Andrew Doran. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: init_sysctl.c,v 1.213 2017/06/01 02:45:13 chs Exp $"); 34 35 #include "opt_sysv.h" 36 #include "opt_compat_netbsd.h" 37 #include "opt_modular.h" 38 #include "pty.h" 39 40 #include <sys/types.h> 41 #include <sys/param.h> 42 #include <sys/sysctl.h> 43 #include <sys/cpu.h> 44 #include <sys/errno.h> 45 #include <sys/systm.h> 46 #include <sys/kernel.h> 47 #include <sys/unistd.h> 48 #include <sys/disklabel.h> 49 #include <sys/cprng.h> 50 #include <sys/vnode_impl.h> /* For vfs_drainvnodes(). */ 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/reboot.h> 60 #include <sys/resource.h> 61 #include <sys/resourcevar.h> 62 #include <sys/exec.h> 63 #include <sys/conf.h> 64 #include <sys/device.h> 65 #include <sys/stat.h> 66 #include <sys/kauth.h> 67 #include <sys/ktrace.h> 68 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_messages(SYSCTLFN_PROTO); 115 static int sysctl_kern_rtc_offset(SYSCTLFN_PROTO); 116 static int sysctl_kern_maxproc(SYSCTLFN_PROTO); 117 static int sysctl_kern_hostid(SYSCTLFN_PROTO); 118 static int sysctl_kern_defcorename(SYSCTLFN_PROTO); 119 static int sysctl_kern_cptime(SYSCTLFN_PROTO); 120 #if NPTY > 0 121 static int sysctl_kern_maxptys(SYSCTLFN_PROTO); 122 #endif /* NPTY > 0 */ 123 static int sysctl_kern_lwp(SYSCTLFN_PROTO); 124 static int sysctl_kern_forkfsleep(SYSCTLFN_PROTO); 125 static int sysctl_kern_root_partition(SYSCTLFN_PROTO); 126 static int sysctl_kern_drivers(SYSCTLFN_PROTO); 127 static int sysctl_security_setidcore(SYSCTLFN_PROTO); 128 static int sysctl_security_setidcorename(SYSCTLFN_PROTO); 129 static int sysctl_kern_cpid(SYSCTLFN_PROTO); 130 static int sysctl_hw_usermem(SYSCTLFN_PROTO); 131 static int sysctl_hw_cnmagic(SYSCTLFN_PROTO); 132 133 static void fill_lwp(struct lwp *l, struct kinfo_lwp *kl); 134 135 /* 136 * ******************************************************************** 137 * section 1: setup routines 138 * ******************************************************************** 139 * These functions are stuffed into a link set for sysctl setup 140 * functions. They're never called or referenced from anywhere else. 141 * ******************************************************************** 142 */ 143 144 /* 145 * this setup routine is a replacement for kern_sysctl() 146 */ 147 SYSCTL_SETUP(sysctl_kern_setup, "sysctl kern subtree setup") 148 { 149 extern int kern_logsigexit; /* defined in kern/kern_sig.c */ 150 extern fixpt_t ccpu; /* defined in kern/kern_synch.c */ 151 extern int dumponpanic; /* defined in kern/subr_prf.c */ 152 const struct sysctlnode *rnode; 153 154 sysctl_createv(clog, 0, NULL, NULL, 155 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 156 CTLTYPE_INT, "maxvnodes", 157 SYSCTL_DESCR("Maximum number of vnodes"), 158 sysctl_kern_maxvnodes, 0, NULL, 0, 159 CTL_KERN, KERN_MAXVNODES, CTL_EOL); 160 sysctl_createv(clog, 0, NULL, NULL, 161 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 162 CTLTYPE_INT, "maxproc", 163 SYSCTL_DESCR("Maximum number of simultaneous processes"), 164 sysctl_kern_maxproc, 0, NULL, 0, 165 CTL_KERN, KERN_MAXPROC, CTL_EOL); 166 sysctl_createv(clog, 0, NULL, NULL, 167 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 168 CTLTYPE_INT, "maxfiles", 169 SYSCTL_DESCR("Maximum number of open files"), 170 NULL, 0, &maxfiles, 0, 171 CTL_KERN, KERN_MAXFILES, CTL_EOL); 172 sysctl_createv(clog, 0, NULL, NULL, 173 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 174 CTLTYPE_INT, "argmax", 175 SYSCTL_DESCR("Maximum number of bytes of arguments to " 176 "execve(2)"), 177 NULL, ARG_MAX, NULL, 0, 178 CTL_KERN, KERN_ARGMAX, CTL_EOL); 179 sysctl_createv(clog, 0, NULL, NULL, 180 CTLFLAG_PERMANENT|CTLFLAG_READWRITE|CTLFLAG_HEX, 181 CTLTYPE_INT, "hostid", 182 SYSCTL_DESCR("System host ID number"), 183 sysctl_kern_hostid, 0, NULL, 0, 184 CTL_KERN, KERN_HOSTID, CTL_EOL); 185 sysctl_createv(clog, 0, NULL, NULL, 186 CTLFLAG_PERMANENT, 187 CTLTYPE_STRUCT, "vnode", 188 SYSCTL_DESCR("System vnode table"), 189 sysctl_kern_vnode, 0, NULL, 0, 190 CTL_KERN, KERN_VNODE, CTL_EOL); 191 #ifndef GPROF 192 sysctl_createv(clog, 0, NULL, NULL, 193 CTLFLAG_PERMANENT, 194 CTLTYPE_NODE, "profiling", 195 SYSCTL_DESCR("Profiling information (not available)"), 196 sysctl_notavail, 0, NULL, 0, 197 CTL_KERN, KERN_PROF, CTL_EOL); 198 #endif 199 sysctl_createv(clog, 0, NULL, NULL, 200 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 201 CTLTYPE_INT, "posix1version", 202 SYSCTL_DESCR("Version of ISO/IEC 9945 (POSIX 1003.1) " 203 "with which the operating system attempts " 204 "to comply"), 205 NULL, _POSIX_VERSION, NULL, 0, 206 CTL_KERN, KERN_POSIX1, CTL_EOL); 207 sysctl_createv(clog, 0, NULL, NULL, 208 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 209 CTLTYPE_INT, "ngroups", 210 SYSCTL_DESCR("Maximum number of supplemental groups"), 211 NULL, NGROUPS_MAX, NULL, 0, 212 CTL_KERN, KERN_NGROUPS, CTL_EOL); 213 sysctl_createv(clog, 0, NULL, NULL, 214 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 215 CTLTYPE_INT, "job_control", 216 SYSCTL_DESCR("Whether job control is available"), 217 NULL, 1, NULL, 0, 218 CTL_KERN, KERN_JOB_CONTROL, CTL_EOL); 219 sysctl_createv(clog, 0, NULL, NULL, 220 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 221 CTLTYPE_INT, "saved_ids", 222 SYSCTL_DESCR("Whether POSIX saved set-group/user ID is " 223 "available"), NULL, 224 #ifdef _POSIX_SAVED_IDS 225 1, 226 #else /* _POSIX_SAVED_IDS */ 227 0, 228 #endif /* _POSIX_SAVED_IDS */ 229 NULL, 0, CTL_KERN, KERN_SAVED_IDS, CTL_EOL); 230 sysctl_createv(clog, 0, NULL, NULL, 231 CTLFLAG_PERMANENT|CTLFLAG_HEX, 232 CTLTYPE_INT, "boothowto", 233 SYSCTL_DESCR("Flags from boot loader"), 234 NULL, 0, &boothowto, sizeof(boothowto), 235 CTL_KERN, CTL_CREATE, CTL_EOL); 236 sysctl_createv(clog, 0, NULL, NULL, 237 CTLFLAG_PERMANENT, 238 CTLTYPE_STRUCT, "boottime", 239 SYSCTL_DESCR("System boot time"), 240 NULL, 0, &boottime, sizeof(boottime), 241 CTL_KERN, KERN_BOOTTIME, CTL_EOL); 242 sysctl_createv(clog, 0, NULL, NULL, 243 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 244 CTLTYPE_INT, "maxpartitions", 245 SYSCTL_DESCR("Maximum number of partitions allowed per " 246 "disk"), 247 NULL, MAXPARTITIONS, NULL, 0, 248 CTL_KERN, KERN_MAXPARTITIONS, CTL_EOL); 249 sysctl_createv(clog, 0, NULL, NULL, 250 CTLFLAG_PERMANENT, 251 CTLTYPE_STRUCT, "timex", NULL, 252 sysctl_notavail, 0, NULL, 0, 253 CTL_KERN, KERN_TIMEX, CTL_EOL); 254 sysctl_createv(clog, 0, NULL, NULL, 255 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 256 CTLTYPE_INT, "rtc_offset", 257 SYSCTL_DESCR("Offset of real time clock from UTC in " 258 "minutes"), 259 sysctl_kern_rtc_offset, 0, &rtc_offset, 0, 260 CTL_KERN, KERN_RTC_OFFSET, CTL_EOL); 261 sysctl_createv(clog, 0, NULL, NULL, 262 CTLFLAG_PERMANENT, 263 CTLTYPE_STRING, "root_device", 264 SYSCTL_DESCR("Name of the root device"), 265 sysctl_root_device, 0, NULL, 0, 266 CTL_KERN, KERN_ROOT_DEVICE, CTL_EOL); 267 sysctl_createv(clog, 0, NULL, NULL, 268 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 269 CTLTYPE_INT, "fsync", 270 SYSCTL_DESCR("Whether the POSIX 1003.1b File " 271 "Synchronization Option is available on " 272 "this system"), 273 NULL, 1, NULL, 0, 274 CTL_KERN, KERN_FSYNC, CTL_EOL); 275 sysctl_createv(clog, 0, NULL, NULL, 276 CTLFLAG_PERMANENT, 277 CTLTYPE_NODE, "ipc", 278 SYSCTL_DESCR("SysV IPC options"), 279 NULL, 0, NULL, 0, 280 CTL_KERN, KERN_SYSVIPC, CTL_EOL); 281 sysctl_createv(clog, 0, NULL, NULL, 282 CTLFLAG_PERMANENT|CTLFLAG_READONLY, 283 CTLTYPE_INT, "sysvmsg", 284 SYSCTL_DESCR("System V style message support available"), 285 NULL, 0, &kern_has_sysvmsg, sizeof(int), 286 CTL_KERN, KERN_SYSVIPC, KERN_SYSVIPC_MSG, CTL_EOL); 287 sysctl_createv(clog, 0, NULL, NULL, 288 CTLFLAG_PERMANENT|CTLFLAG_READONLY, 289 CTLTYPE_INT, "sysvsem", 290 SYSCTL_DESCR("System V style semaphore support " 291 "available"), 292 NULL, 0, &kern_has_sysvsem, sizeof(int), 293 CTL_KERN, KERN_SYSVIPC, KERN_SYSVIPC_SEM, CTL_EOL); 294 sysctl_createv(clog, 0, NULL, NULL, 295 CTLFLAG_PERMANENT|CTLFLAG_READONLY, 296 CTLTYPE_INT, "sysvshm", 297 SYSCTL_DESCR("System V style shared memory support " 298 "available"), 299 NULL, 0, &kern_has_sysvshm, sizeof(int), 300 CTL_KERN, KERN_SYSVIPC, KERN_SYSVIPC_SHM, CTL_EOL); 301 sysctl_createv(clog, 0, NULL, NULL, 302 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 303 CTLTYPE_INT, "synchronized_io", 304 SYSCTL_DESCR("Whether the POSIX 1003.1b Synchronized " 305 "I/O Option is available on this system"), 306 NULL, 1, NULL, 0, 307 CTL_KERN, KERN_SYNCHRONIZED_IO, CTL_EOL); 308 sysctl_createv(clog, 0, NULL, NULL, 309 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 310 CTLTYPE_INT, "iov_max", 311 SYSCTL_DESCR("Maximum number of iovec structures per " 312 "process"), 313 NULL, IOV_MAX, NULL, 0, 314 CTL_KERN, KERN_IOV_MAX, CTL_EOL); 315 sysctl_createv(clog, 0, NULL, NULL, 316 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 317 CTLTYPE_INT, "mapped_files", 318 SYSCTL_DESCR("Whether the POSIX 1003.1b Memory Mapped " 319 "Files Option is available on this system"), 320 NULL, 1, NULL, 0, 321 CTL_KERN, KERN_MAPPED_FILES, CTL_EOL); 322 sysctl_createv(clog, 0, NULL, NULL, 323 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 324 CTLTYPE_INT, "memlock", 325 SYSCTL_DESCR("Whether the POSIX 1003.1b Process Memory " 326 "Locking Option is available on this " 327 "system"), 328 NULL, 1, NULL, 0, 329 CTL_KERN, KERN_MEMLOCK, CTL_EOL); 330 sysctl_createv(clog, 0, NULL, NULL, 331 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 332 CTLTYPE_INT, "memlock_range", 333 SYSCTL_DESCR("Whether the POSIX 1003.1b Range Memory " 334 "Locking Option is available on this " 335 "system"), 336 NULL, 1, NULL, 0, 337 CTL_KERN, KERN_MEMLOCK_RANGE, CTL_EOL); 338 sysctl_createv(clog, 0, NULL, NULL, 339 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 340 CTLTYPE_INT, "memory_protection", 341 SYSCTL_DESCR("Whether the POSIX 1003.1b Memory " 342 "Protection Option is available on this " 343 "system"), 344 NULL, 1, NULL, 0, 345 CTL_KERN, KERN_MEMORY_PROTECTION, CTL_EOL); 346 sysctl_createv(clog, 0, NULL, NULL, 347 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 348 CTLTYPE_INT, "login_name_max", 349 SYSCTL_DESCR("Maximum login name length"), 350 NULL, LOGIN_NAME_MAX, NULL, 0, 351 CTL_KERN, KERN_LOGIN_NAME_MAX, CTL_EOL); 352 sysctl_createv(clog, 0, NULL, NULL, 353 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 354 CTLTYPE_STRING, "defcorename", 355 SYSCTL_DESCR("Default core file name"), 356 sysctl_kern_defcorename, 0, defcorename, MAXPATHLEN, 357 CTL_KERN, KERN_DEFCORENAME, CTL_EOL); 358 sysctl_createv(clog, 0, NULL, NULL, 359 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 360 CTLTYPE_INT, "logsigexit", 361 SYSCTL_DESCR("Log process exit when caused by signals"), 362 NULL, 0, &kern_logsigexit, 0, 363 CTL_KERN, KERN_LOGSIGEXIT, CTL_EOL); 364 sysctl_createv(clog, 0, NULL, NULL, 365 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 366 CTLTYPE_INT, "fscale", 367 SYSCTL_DESCR("Kernel fixed-point scale factor"), 368 NULL, FSCALE, NULL, 0, 369 CTL_KERN, KERN_FSCALE, CTL_EOL); 370 sysctl_createv(clog, 0, NULL, NULL, 371 CTLFLAG_PERMANENT, 372 CTLTYPE_INT, "ccpu", 373 SYSCTL_DESCR("Scheduler exponential decay value"), 374 NULL, 0, &ccpu, 0, 375 CTL_KERN, KERN_CCPU, CTL_EOL); 376 sysctl_createv(clog, 0, NULL, NULL, 377 CTLFLAG_PERMANENT, 378 CTLTYPE_STRUCT, "cp_time", 379 SYSCTL_DESCR("Clock ticks spent in different CPU states"), 380 sysctl_kern_cptime, 0, NULL, 0, 381 CTL_KERN, KERN_CP_TIME, CTL_EOL); 382 sysctl_createv(clog, 0, NULL, NULL, 383 CTLFLAG_PERMANENT, 384 CTLTYPE_STRUCT, "consdev", 385 SYSCTL_DESCR("Console device"), 386 sysctl_consdev, 0, NULL, sizeof(dev_t), 387 CTL_KERN, KERN_CONSDEV, CTL_EOL); 388 #if NPTY > 0 389 sysctl_createv(clog, 0, NULL, NULL, 390 CTLFLAG_PERMANENT, 391 CTLTYPE_INT, "maxptys", 392 SYSCTL_DESCR("Maximum number of pseudo-ttys"), 393 sysctl_kern_maxptys, 0, NULL, 0, 394 CTL_KERN, KERN_MAXPTYS, CTL_EOL); 395 #endif /* NPTY > 0 */ 396 sysctl_createv(clog, 0, NULL, NULL, 397 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 398 CTLTYPE_INT, "maxphys", 399 SYSCTL_DESCR("Maximum raw I/O transfer size"), 400 NULL, MAXPHYS, NULL, 0, 401 CTL_KERN, KERN_MAXPHYS, CTL_EOL); 402 sysctl_createv(clog, 0, NULL, NULL, 403 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 404 CTLTYPE_INT, "monotonic_clock", 405 SYSCTL_DESCR("Implementation version of the POSIX " 406 "1003.1b Monotonic Clock Option"), 407 /* XXX _POSIX_VERSION */ 408 NULL, _POSIX_MONOTONIC_CLOCK, NULL, 0, 409 CTL_KERN, KERN_MONOTONIC_CLOCK, CTL_EOL); 410 sysctl_createv(clog, 0, NULL, NULL, 411 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 412 CTLTYPE_INT, "labelsector", 413 SYSCTL_DESCR("Sector number containing the disklabel"), 414 NULL, LABELSECTOR, NULL, 0, 415 CTL_KERN, KERN_LABELSECTOR, CTL_EOL); 416 sysctl_createv(clog, 0, NULL, NULL, 417 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 418 CTLTYPE_INT, "labeloffset", 419 SYSCTL_DESCR("Offset of the disklabel within the " 420 "sector"), 421 NULL, LABELOFFSET, NULL, 0, 422 CTL_KERN, KERN_LABELOFFSET, CTL_EOL); 423 sysctl_createv(clog, 0, NULL, NULL, 424 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 425 CTLTYPE_INT, "labelusesmbr", 426 SYSCTL_DESCR("disklabel is inside MBR partition"), 427 NULL, LABELUSESMBR, NULL, 0, 428 CTL_KERN, CTL_CREATE, CTL_EOL); 429 sysctl_createv(clog, 0, NULL, NULL, 430 CTLFLAG_PERMANENT, 431 CTLTYPE_NODE, "lwp", 432 SYSCTL_DESCR("System-wide LWP information"), 433 sysctl_kern_lwp, 0, NULL, 0, 434 CTL_KERN, KERN_LWP, CTL_EOL); 435 sysctl_createv(clog, 0, NULL, NULL, 436 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 437 CTLTYPE_INT, "forkfsleep", 438 SYSCTL_DESCR("Milliseconds to sleep on fork failure due " 439 "to process limits"), 440 sysctl_kern_forkfsleep, 0, NULL, 0, 441 CTL_KERN, KERN_FORKFSLEEP, CTL_EOL); 442 sysctl_createv(clog, 0, NULL, NULL, 443 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 444 CTLTYPE_INT, "posix_threads", 445 SYSCTL_DESCR("Version of IEEE Std 1003.1 and its " 446 "Threads option to which the system " 447 "attempts to conform"), 448 /* XXX _POSIX_VERSION */ 449 NULL, _POSIX_THREADS, NULL, 0, 450 CTL_KERN, KERN_POSIX_THREADS, CTL_EOL); 451 sysctl_createv(clog, 0, NULL, NULL, 452 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 453 CTLTYPE_INT, "posix_semaphores", 454 SYSCTL_DESCR("Version of IEEE Std 1003.1 and its " 455 "Semaphores option to which the system " 456 "attempts to conform"), NULL, 457 200112, NULL, 0, 458 CTL_KERN, KERN_POSIX_SEMAPHORES, CTL_EOL); 459 sysctl_createv(clog, 0, NULL, NULL, 460 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 461 CTLTYPE_INT, "posix_barriers", 462 SYSCTL_DESCR("Version of IEEE Std 1003.1 and its " 463 "Barriers option to which the system " 464 "attempts to conform"), 465 /* XXX _POSIX_VERSION */ 466 NULL, _POSIX_BARRIERS, NULL, 0, 467 CTL_KERN, KERN_POSIX_BARRIERS, CTL_EOL); 468 sysctl_createv(clog, 0, NULL, NULL, 469 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 470 CTLTYPE_INT, "posix_timers", 471 SYSCTL_DESCR("Version of IEEE Std 1003.1 and its " 472 "Timers option to which the system " 473 "attempts to conform"), 474 /* XXX _POSIX_VERSION */ 475 NULL, _POSIX_TIMERS, NULL, 0, 476 CTL_KERN, KERN_POSIX_TIMERS, CTL_EOL); 477 sysctl_createv(clog, 0, NULL, NULL, 478 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 479 CTLTYPE_INT, "posix_spin_locks", 480 SYSCTL_DESCR("Version of IEEE Std 1003.1 and its Spin " 481 "Locks option to which the system attempts " 482 "to conform"), 483 /* XXX _POSIX_VERSION */ 484 NULL, _POSIX_SPIN_LOCKS, NULL, 0, 485 CTL_KERN, KERN_POSIX_SPIN_LOCKS, CTL_EOL); 486 sysctl_createv(clog, 0, NULL, NULL, 487 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 488 CTLTYPE_INT, "posix_reader_writer_locks", 489 SYSCTL_DESCR("Version of IEEE Std 1003.1 and its " 490 "Read-Write Locks option to which the " 491 "system attempts to conform"), 492 /* XXX _POSIX_VERSION */ 493 NULL, _POSIX_READER_WRITER_LOCKS, NULL, 0, 494 CTL_KERN, KERN_POSIX_READER_WRITER_LOCKS, CTL_EOL); 495 sysctl_createv(clog, 0, NULL, NULL, 496 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 497 CTLTYPE_INT, "dump_on_panic", 498 SYSCTL_DESCR("Perform a crash dump on system panic"), 499 NULL, 0, &dumponpanic, 0, 500 CTL_KERN, KERN_DUMP_ON_PANIC, CTL_EOL); 501 #ifdef DIAGNOSTIC 502 sysctl_createv(clog, 0, NULL, NULL, 503 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 504 CTLTYPE_INT, "panic_now", 505 SYSCTL_DESCR("Trigger a panic"), 506 sysctl_kern_trigger_panic, 0, NULL, 0, 507 CTL_KERN, CTL_CREATE, CTL_EOL); 508 #endif 509 sysctl_createv(clog, 0, NULL, NULL, 510 CTLFLAG_PERMANENT, 511 CTLTYPE_INT, "root_partition", 512 SYSCTL_DESCR("Root partition on the root device"), 513 sysctl_kern_root_partition, 0, NULL, 0, 514 CTL_KERN, KERN_ROOT_PARTITION, CTL_EOL); 515 sysctl_createv(clog, 0, NULL, NULL, 516 CTLFLAG_PERMANENT, 517 CTLTYPE_STRUCT, "drivers", 518 SYSCTL_DESCR("List of all drivers with block and " 519 "character device numbers"), 520 sysctl_kern_drivers, 0, NULL, 0, 521 CTL_KERN, KERN_DRIVERS, CTL_EOL); 522 sysctl_createv(clog, 0, NULL, NULL, 523 CTLFLAG_PERMANENT, 524 CTLTYPE_STRUCT, "cp_id", 525 SYSCTL_DESCR("Mapping of CPU number to CPU id"), 526 sysctl_kern_cpid, 0, NULL, 0, 527 CTL_KERN, KERN_CP_ID, CTL_EOL); 528 sysctl_createv(clog, 0, NULL, &rnode, 529 CTLFLAG_PERMANENT, 530 CTLTYPE_NODE, "coredump", 531 SYSCTL_DESCR("Coredump settings."), 532 NULL, 0, NULL, 0, 533 CTL_KERN, CTL_CREATE, CTL_EOL); 534 sysctl_createv(clog, 0, &rnode, &rnode, 535 CTLFLAG_PERMANENT, 536 CTLTYPE_NODE, "setid", 537 SYSCTL_DESCR("Set-id processes' coredump settings."), 538 NULL, 0, NULL, 0, 539 CTL_CREATE, CTL_EOL); 540 sysctl_createv(clog, 0, &rnode, NULL, 541 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 542 CTLTYPE_INT, "dump", 543 SYSCTL_DESCR("Allow set-id processes to dump core."), 544 sysctl_security_setidcore, 0, &security_setidcore_dump, 545 sizeof(security_setidcore_dump), 546 CTL_CREATE, CTL_EOL); 547 sysctl_createv(clog, 0, &rnode, NULL, 548 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 549 CTLTYPE_STRING, "path", 550 SYSCTL_DESCR("Path pattern for set-id coredumps."), 551 sysctl_security_setidcorename, 0, 552 security_setidcore_path, 553 sizeof(security_setidcore_path), 554 CTL_CREATE, CTL_EOL); 555 sysctl_createv(clog, 0, &rnode, NULL, 556 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 557 CTLTYPE_INT, "owner", 558 SYSCTL_DESCR("Owner id for set-id processes' cores."), 559 sysctl_security_setidcore, 0, &security_setidcore_owner, 560 0, 561 CTL_CREATE, CTL_EOL); 562 sysctl_createv(clog, 0, &rnode, NULL, 563 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 564 CTLTYPE_INT, "group", 565 SYSCTL_DESCR("Group id for set-id processes' cores."), 566 sysctl_security_setidcore, 0, &security_setidcore_group, 567 0, 568 CTL_CREATE, CTL_EOL); 569 sysctl_createv(clog, 0, &rnode, NULL, 570 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 571 CTLTYPE_INT, "mode", 572 SYSCTL_DESCR("Mode for set-id processes' cores."), 573 sysctl_security_setidcore, 0, &security_setidcore_mode, 574 0, 575 CTL_CREATE, CTL_EOL); 576 sysctl_createv(clog, 0, NULL, NULL, 577 CTLFLAG_IMMEDIATE|CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 578 CTLTYPE_INT, "no_sa_support", 579 SYSCTL_DESCR("0 if the kernel supports SA, otherwise " 580 "it doesn't"), 581 NULL, 1, NULL, 0, 582 CTL_KERN, CTL_CREATE, CTL_EOL); 583 sysctl_createv(clog, 0, NULL, NULL, 584 CTLFLAG_PERMANENT, 585 CTLTYPE_STRING, "configname", 586 SYSCTL_DESCR("Name of config file"), 587 NULL, 0, __UNCONST(kernel_ident), 0, 588 CTL_KERN, CTL_CREATE, CTL_EOL); 589 sysctl_createv(clog, 0, NULL, NULL, 590 CTLFLAG_PERMANENT, 591 CTLTYPE_STRING, "buildinfo", 592 SYSCTL_DESCR("Information from build environment"), 593 NULL, 0, __UNCONST(buildinfo), 0, 594 CTL_KERN, CTL_CREATE, CTL_EOL); 595 sysctl_createv(clog, 0, NULL, NULL, 596 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 597 CTLTYPE_INT, "messages", 598 SYSCTL_DESCR("Kernel message verbosity"), 599 sysctl_kern_messages, 0, NULL, 0, 600 CTL_KERN, CTL_CREATE, CTL_EOL); 601 } 602 603 SYSCTL_SETUP(sysctl_hw_misc_setup, "sysctl hw subtree misc setup") 604 { 605 606 sysctl_createv(clog, 0, NULL, NULL, 607 CTLFLAG_PERMANENT, 608 CTLTYPE_INT, "usermem", 609 SYSCTL_DESCR("Bytes of non-kernel memory"), 610 sysctl_hw_usermem, 0, NULL, 0, 611 CTL_HW, HW_USERMEM, CTL_EOL); 612 sysctl_createv(clog, 0, NULL, NULL, 613 CTLFLAG_PERMANENT|CTLFLAG_READWRITE|CTLFLAG_HEX, 614 CTLTYPE_STRING, "cnmagic", 615 SYSCTL_DESCR("Console magic key sequence"), 616 sysctl_hw_cnmagic, 0, NULL, CNS_LEN, 617 CTL_HW, HW_CNMAGIC, CTL_EOL); 618 sysctl_createv(clog, 0, NULL, NULL, 619 CTLFLAG_PERMANENT, 620 CTLTYPE_QUAD, "usermem64", 621 SYSCTL_DESCR("Bytes of non-kernel memory"), 622 sysctl_hw_usermem, 0, NULL, 0, 623 CTL_HW, HW_USERMEM64, CTL_EOL); 624 } 625 626 #ifdef DEBUG 627 /* 628 * Debugging related system variables. 629 */ 630 struct ctldebug /* debug0, */ /* debug1, */ debug2, debug3, debug4; 631 struct ctldebug debug5, debug6, debug7, debug8, debug9; 632 struct ctldebug debug10, debug11, debug12, debug13, debug14; 633 struct ctldebug debug15, debug16, debug17, debug18, debug19; 634 static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = { 635 &debug0, &debug1, &debug2, &debug3, &debug4, 636 &debug5, &debug6, &debug7, &debug8, &debug9, 637 &debug10, &debug11, &debug12, &debug13, &debug14, 638 &debug15, &debug16, &debug17, &debug18, &debug19, 639 }; 640 641 /* 642 * this setup routine is a replacement for debug_sysctl() 643 * 644 * note that it creates several nodes per defined debug variable 645 */ 646 SYSCTL_SETUP(sysctl_debug_setup, "sysctl debug subtree setup") 647 { 648 struct ctldebug *cdp; 649 char nodename[20]; 650 int i; 651 652 /* 653 * two ways here: 654 * 655 * the "old" way (debug.name -> value) which was emulated by 656 * the sysctl(8) binary 657 * 658 * the new way, which the sysctl(8) binary was actually using 659 660 node debug 661 node debug.0 662 string debug.0.name 663 int debug.0.value 664 int debug.name 665 666 */ 667 668 for (i = 0; i < CTL_DEBUG_MAXID; i++) { 669 cdp = debugvars[i]; 670 if (cdp->debugname == NULL || cdp->debugvar == NULL) 671 continue; 672 673 snprintf(nodename, sizeof(nodename), "debug%d", i); 674 sysctl_createv(clog, 0, NULL, NULL, 675 CTLFLAG_PERMANENT|CTLFLAG_HIDDEN, 676 CTLTYPE_NODE, nodename, NULL, 677 NULL, 0, NULL, 0, 678 CTL_DEBUG, i, CTL_EOL); 679 sysctl_createv(clog, 0, NULL, NULL, 680 CTLFLAG_PERMANENT|CTLFLAG_HIDDEN, 681 CTLTYPE_STRING, "name", NULL, 682 /*XXXUNCONST*/ 683 NULL, 0, __UNCONST(cdp->debugname), 0, 684 CTL_DEBUG, i, CTL_DEBUG_NAME, CTL_EOL); 685 sysctl_createv(clog, 0, NULL, NULL, 686 CTLFLAG_PERMANENT|CTLFLAG_HIDDEN, 687 CTLTYPE_INT, "value", NULL, 688 NULL, 0, cdp->debugvar, 0, 689 CTL_DEBUG, i, CTL_DEBUG_VALUE, CTL_EOL); 690 sysctl_createv(clog, 0, NULL, NULL, 691 CTLFLAG_PERMANENT, 692 CTLTYPE_INT, cdp->debugname, NULL, 693 NULL, 0, cdp->debugvar, 0, 694 CTL_DEBUG, CTL_CREATE, CTL_EOL); 695 } 696 } 697 #endif /* DEBUG */ 698 699 /* 700 * ******************************************************************** 701 * section 2: private node-specific helper routines. 702 * ******************************************************************** 703 */ 704 705 #ifdef DIAGNOSTIC 706 static int 707 sysctl_kern_trigger_panic(SYSCTLFN_ARGS) 708 { 709 int newtrig, error; 710 struct sysctlnode node; 711 712 newtrig = 0; 713 node = *rnode; 714 node.sysctl_data = &newtrig; 715 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 716 if (error || newp == NULL) 717 return (error); 718 719 if (newtrig != 0) 720 panic("Panic triggered"); 721 722 return (error); 723 } 724 #endif 725 726 /* 727 * sysctl helper routine for kern.maxvnodes. Drain vnodes if 728 * new value is lower than desiredvnodes and then calls reinit 729 * routines that needs to adjust to the new value. 730 */ 731 static int 732 sysctl_kern_maxvnodes(SYSCTLFN_ARGS) 733 { 734 int error, new_vnodes, old_vnodes, new_max; 735 struct sysctlnode node; 736 737 new_vnodes = desiredvnodes; 738 node = *rnode; 739 node.sysctl_data = &new_vnodes; 740 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 741 if (error || newp == NULL) 742 return (error); 743 744 /* 745 * sysctl passes down unsigned values, require them 746 * to be positive 747 */ 748 if (new_vnodes <= 0) 749 return (EINVAL); 750 751 /* Limits: 75% of kmem and physical memory. */ 752 new_max = calc_cache_size(vmem_size(kmem_arena, VMEM_FREE|VMEM_ALLOC), 753 75, 75) / VNODE_COST; 754 if (new_vnodes > new_max) 755 new_vnodes = new_max; 756 757 old_vnodes = desiredvnodes; 758 desiredvnodes = new_vnodes; 759 error = vfs_drainvnodes(); 760 if (error) { 761 desiredvnodes = old_vnodes; 762 return (error); 763 } 764 vfs_reinit(); 765 nchreinit(); 766 767 return (0); 768 } 769 770 /* 771 * sysctl helper routine for kern.messages. 772 * Alters boothowto to display kernel messages in increasing verbosity 773 * from 0 to 4. 774 */ 775 776 #define MAXMESSAGES 4 777 static int 778 sysctl_kern_messages(SYSCTLFN_ARGS) 779 { 780 int error, messageverbose, messagemask, newboothowto; 781 struct sysctlnode node; 782 783 messagemask = (AB_NORMAL|AB_QUIET|AB_SILENT|AB_VERBOSE|AB_DEBUG); 784 switch (boothowto & messagemask) { 785 case AB_SILENT: 786 messageverbose = 0; 787 break; 788 case AB_QUIET: 789 messageverbose = 1; 790 break; 791 case AB_VERBOSE: 792 messageverbose = 3; 793 break; 794 case AB_DEBUG: 795 messageverbose = 4; 796 break; 797 case AB_NORMAL: 798 default: 799 messageverbose = 2; 800 } 801 802 node = *rnode; 803 node.sysctl_data = &messageverbose; 804 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 805 if (error || newp == NULL) 806 return (error); 807 if (messageverbose < 0 || messageverbose > MAXMESSAGES) 808 return EINVAL; 809 810 /* Set boothowto */ 811 newboothowto = boothowto & ~messagemask; 812 813 switch (messageverbose) { 814 case 0: 815 newboothowto |= AB_SILENT; 816 break; 817 case 1: 818 newboothowto |= AB_QUIET; 819 break; 820 case 3: 821 newboothowto |= AB_VERBOSE; 822 break; 823 case 4: 824 newboothowto |= AB_DEBUG; 825 break; 826 case 2: 827 default: /* Messages default to normal. */ 828 break; 829 } 830 831 boothowto = newboothowto; 832 833 return (0); 834 } 835 836 /* 837 * sysctl helper routine for rtc_offset - set time after changes 838 */ 839 static int 840 sysctl_kern_rtc_offset(SYSCTLFN_ARGS) 841 { 842 struct timespec ts, delta; 843 int error, new_rtc_offset; 844 struct sysctlnode node; 845 846 new_rtc_offset = rtc_offset; 847 node = *rnode; 848 node.sysctl_data = &new_rtc_offset; 849 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 850 if (error || newp == NULL) 851 return (error); 852 853 if (kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_TIME, 854 KAUTH_REQ_SYSTEM_TIME_RTCOFFSET, 855 KAUTH_ARG(new_rtc_offset), NULL, NULL)) 856 return (EPERM); 857 if (rtc_offset == new_rtc_offset) 858 return (0); 859 860 /* if we change the offset, adjust the time */ 861 nanotime(&ts); 862 delta.tv_sec = 60 * (new_rtc_offset - rtc_offset); 863 delta.tv_nsec = 0; 864 timespecadd(&ts, &delta, &ts); 865 rtc_offset = new_rtc_offset; 866 return (settime(l->l_proc, &ts)); 867 } 868 869 /* 870 * sysctl helper routine for kern.maxproc. Ensures that the new 871 * values are not too low or too high. 872 */ 873 static int 874 sysctl_kern_maxproc(SYSCTLFN_ARGS) 875 { 876 int error, nmaxproc; 877 struct sysctlnode node; 878 879 nmaxproc = maxproc; 880 node = *rnode; 881 node.sysctl_data = &nmaxproc; 882 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 883 if (error || newp == NULL) 884 return (error); 885 886 if (nmaxproc < 0 || nmaxproc >= PID_MAX) 887 return (EINVAL); 888 #ifdef __HAVE_CPU_MAXPROC 889 if (nmaxproc > cpu_maxproc()) 890 return (EINVAL); 891 #endif 892 maxproc = nmaxproc; 893 894 return (0); 895 } 896 897 /* 898 * sysctl helper function for kern.hostid. The hostid is a long, but 899 * we export it as an int, so we need to give it a little help. 900 */ 901 static int 902 sysctl_kern_hostid(SYSCTLFN_ARGS) 903 { 904 int error, inthostid; 905 struct sysctlnode node; 906 907 inthostid = hostid; /* XXX assumes sizeof int <= sizeof long */ 908 node = *rnode; 909 node.sysctl_data = &inthostid; 910 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 911 if (error || newp == NULL) 912 return (error); 913 914 hostid = (unsigned)inthostid; 915 916 return (0); 917 } 918 919 /* 920 * sysctl helper routine for kern.defcorename. In the case of a new 921 * string being assigned, check that it's not a zero-length string. 922 * (XXX the check in -current doesn't work, but do we really care?) 923 */ 924 static int 925 sysctl_kern_defcorename(SYSCTLFN_ARGS) 926 { 927 int error; 928 char *newcorename; 929 struct sysctlnode node; 930 931 newcorename = PNBUF_GET(); 932 node = *rnode; 933 node.sysctl_data = &newcorename[0]; 934 memcpy(node.sysctl_data, rnode->sysctl_data, MAXPATHLEN); 935 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 936 if (error || newp == NULL) { 937 goto done; 938 } 939 940 /* 941 * when sysctl_lookup() deals with a string, it's guaranteed 942 * to come back nul terminated. So there. :) 943 */ 944 if (strlen(newcorename) == 0) { 945 error = EINVAL; 946 } else { 947 memcpy(rnode->sysctl_data, node.sysctl_data, MAXPATHLEN); 948 error = 0; 949 } 950 done: 951 PNBUF_PUT(newcorename); 952 return error; 953 } 954 955 /* 956 * sysctl helper routine for kern.cp_time node. Adds up cpu time 957 * across all cpus. 958 */ 959 static int 960 sysctl_kern_cptime(SYSCTLFN_ARGS) 961 { 962 struct sysctlnode node = *rnode; 963 uint64_t *cp_time = NULL; 964 int error, n = ncpu, i; 965 struct cpu_info *ci; 966 CPU_INFO_ITERATOR cii; 967 968 /* 969 * if you specifically pass a buffer that is the size of the 970 * sum, or if you are probing for the size, you get the "sum" 971 * of cp_time (and the size thereof) across all processors. 972 * 973 * alternately, you can pass an additional mib number and get 974 * cp_time for that particular processor. 975 */ 976 switch (namelen) { 977 case 0: 978 if (*oldlenp == sizeof(uint64_t) * CPUSTATES || oldp == NULL) { 979 node.sysctl_size = sizeof(uint64_t) * CPUSTATES; 980 n = -1; /* SUM */ 981 } 982 else { 983 node.sysctl_size = n * sizeof(uint64_t) * CPUSTATES; 984 n = -2; /* ALL */ 985 } 986 break; 987 case 1: 988 if (name[0] < 0 || name[0] >= n) 989 return (ENOENT); /* ENOSUCHPROCESSOR */ 990 node.sysctl_size = sizeof(uint64_t) * CPUSTATES; 991 n = name[0]; 992 /* 993 * adjust these so that sysctl_lookup() will be happy 994 */ 995 name++; 996 namelen--; 997 break; 998 default: 999 return (EINVAL); 1000 } 1001 1002 cp_time = kmem_alloc(node.sysctl_size, KM_SLEEP); 1003 node.sysctl_data = cp_time; 1004 memset(cp_time, 0, node.sysctl_size); 1005 1006 for (CPU_INFO_FOREACH(cii, ci)) { 1007 if (n <= 0) { 1008 for (i = 0; i < CPUSTATES; i++) { 1009 cp_time[i] += ci->ci_schedstate.spc_cp_time[i]; 1010 } 1011 } 1012 /* 1013 * if a specific processor was requested and we just 1014 * did it, we're done here 1015 */ 1016 if (n == 0) 1017 break; 1018 /* 1019 * if doing "all", skip to next cp_time set for next processor 1020 */ 1021 if (n == -2) 1022 cp_time += CPUSTATES; 1023 /* 1024 * if we're doing a specific processor, we're one 1025 * processor closer 1026 */ 1027 if (n > 0) 1028 n--; 1029 } 1030 1031 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1032 kmem_free(node.sysctl_data, node.sysctl_size); 1033 return (error); 1034 } 1035 1036 #if NPTY > 0 1037 /* 1038 * sysctl helper routine for kern.maxptys. Ensures that any new value 1039 * is acceptable to the pty subsystem. 1040 */ 1041 static int 1042 sysctl_kern_maxptys(SYSCTLFN_ARGS) 1043 { 1044 int pty_maxptys(int, int); /* defined in kern/tty_pty.c */ 1045 int error, xmax; 1046 struct sysctlnode node; 1047 1048 /* get current value of maxptys */ 1049 xmax = pty_maxptys(0, 0); 1050 1051 node = *rnode; 1052 node.sysctl_data = &xmax; 1053 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1054 if (error || newp == NULL) 1055 return (error); 1056 1057 if (xmax != pty_maxptys(xmax, 1)) 1058 return (EINVAL); 1059 1060 return (0); 1061 } 1062 #endif /* NPTY > 0 */ 1063 1064 /* 1065 * sysctl helper routine to do kern.lwp.* work. 1066 */ 1067 static int 1068 sysctl_kern_lwp(SYSCTLFN_ARGS) 1069 { 1070 struct kinfo_lwp klwp; 1071 struct proc *p; 1072 struct lwp *l2, *l3; 1073 char *where, *dp; 1074 int pid, elem_size, elem_count; 1075 int buflen, needed, error; 1076 bool gotit; 1077 1078 if (namelen == 1 && name[0] == CTL_QUERY) 1079 return (sysctl_query(SYSCTLFN_CALL(rnode))); 1080 1081 dp = where = oldp; 1082 buflen = where != NULL ? *oldlenp : 0; 1083 error = needed = 0; 1084 1085 if (newp != NULL || namelen != 3) 1086 return (EINVAL); 1087 pid = name[0]; 1088 elem_size = name[1]; 1089 elem_count = name[2]; 1090 1091 sysctl_unlock(); 1092 if (pid == -1) { 1093 mutex_enter(proc_lock); 1094 PROCLIST_FOREACH(p, &allproc) { 1095 /* Grab a hold on the process. */ 1096 if (!rw_tryenter(&p->p_reflock, RW_READER)) { 1097 continue; 1098 } 1099 mutex_exit(proc_lock); 1100 1101 mutex_enter(p->p_lock); 1102 LIST_FOREACH(l2, &p->p_lwps, l_sibling) { 1103 if (buflen >= elem_size && elem_count > 0) { 1104 lwp_lock(l2); 1105 fill_lwp(l2, &klwp); 1106 lwp_unlock(l2); 1107 mutex_exit(p->p_lock); 1108 1109 /* 1110 * Copy out elem_size, but not 1111 * larger than the size of a 1112 * struct kinfo_proc2. 1113 */ 1114 error = dcopyout(l, &klwp, dp, 1115 min(sizeof(klwp), elem_size)); 1116 if (error) { 1117 rw_exit(&p->p_reflock); 1118 goto cleanup; 1119 } 1120 mutex_enter(p->p_lock); 1121 LIST_FOREACH(l3, &p->p_lwps, 1122 l_sibling) { 1123 if (l2 == l3) 1124 break; 1125 } 1126 if (l3 == NULL) { 1127 mutex_exit(p->p_lock); 1128 rw_exit(&p->p_reflock); 1129 error = EAGAIN; 1130 goto cleanup; 1131 } 1132 dp += elem_size; 1133 buflen -= elem_size; 1134 elem_count--; 1135 } 1136 needed += elem_size; 1137 } 1138 mutex_exit(p->p_lock); 1139 1140 /* Drop reference to process. */ 1141 mutex_enter(proc_lock); 1142 rw_exit(&p->p_reflock); 1143 } 1144 mutex_exit(proc_lock); 1145 } else { 1146 mutex_enter(proc_lock); 1147 p = proc_find(pid); 1148 if (p == NULL) { 1149 error = ESRCH; 1150 mutex_exit(proc_lock); 1151 goto cleanup; 1152 } 1153 /* Grab a hold on the process. */ 1154 gotit = rw_tryenter(&p->p_reflock, RW_READER); 1155 mutex_exit(proc_lock); 1156 if (!gotit) { 1157 error = ESRCH; 1158 goto cleanup; 1159 } 1160 1161 mutex_enter(p->p_lock); 1162 LIST_FOREACH(l2, &p->p_lwps, l_sibling) { 1163 if (buflen >= elem_size && elem_count > 0) { 1164 lwp_lock(l2); 1165 fill_lwp(l2, &klwp); 1166 lwp_unlock(l2); 1167 mutex_exit(p->p_lock); 1168 /* 1169 * Copy out elem_size, but not larger than 1170 * the size of a struct kinfo_proc2. 1171 */ 1172 error = dcopyout(l, &klwp, dp, 1173 min(sizeof(klwp), elem_size)); 1174 if (error) { 1175 rw_exit(&p->p_reflock); 1176 goto cleanup; 1177 } 1178 mutex_enter(p->p_lock); 1179 LIST_FOREACH(l3, &p->p_lwps, l_sibling) { 1180 if (l2 == l3) 1181 break; 1182 } 1183 if (l3 == NULL) { 1184 mutex_exit(p->p_lock); 1185 rw_exit(&p->p_reflock); 1186 error = EAGAIN; 1187 goto cleanup; 1188 } 1189 dp += elem_size; 1190 buflen -= elem_size; 1191 elem_count--; 1192 } 1193 needed += elem_size; 1194 } 1195 mutex_exit(p->p_lock); 1196 1197 /* Drop reference to process. */ 1198 rw_exit(&p->p_reflock); 1199 } 1200 1201 if (where != NULL) { 1202 *oldlenp = dp - where; 1203 if (needed > *oldlenp) { 1204 sysctl_relock(); 1205 return (ENOMEM); 1206 } 1207 } else { 1208 needed += KERN_LWPSLOP; 1209 *oldlenp = needed; 1210 } 1211 error = 0; 1212 cleanup: 1213 sysctl_relock(); 1214 return (error); 1215 } 1216 1217 /* 1218 * sysctl helper routine for kern.forkfsleep node. Ensures that the 1219 * given value is not too large or two small, and is at least one 1220 * timer tick if not zero. 1221 */ 1222 static int 1223 sysctl_kern_forkfsleep(SYSCTLFN_ARGS) 1224 { 1225 /* userland sees value in ms, internally is in ticks */ 1226 extern int forkfsleep; /* defined in kern/kern_fork.c */ 1227 int error, timo, lsleep; 1228 struct sysctlnode node; 1229 1230 lsleep = forkfsleep * 1000 / hz; 1231 node = *rnode; 1232 node.sysctl_data = &lsleep; 1233 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1234 if (error || newp == NULL) 1235 return (error); 1236 1237 /* refuse negative values, and overly 'long time' */ 1238 if (lsleep < 0 || lsleep > MAXSLP * 1000) 1239 return (EINVAL); 1240 1241 timo = mstohz(lsleep); 1242 1243 /* if the interval is >0 ms && <1 tick, use 1 tick */ 1244 if (lsleep != 0 && timo == 0) 1245 forkfsleep = 1; 1246 else 1247 forkfsleep = timo; 1248 1249 return (0); 1250 } 1251 1252 /* 1253 * sysctl helper routine for kern.root_partition 1254 */ 1255 static int 1256 sysctl_kern_root_partition(SYSCTLFN_ARGS) 1257 { 1258 int rootpart = DISKPART(rootdev); 1259 struct sysctlnode node = *rnode; 1260 1261 node.sysctl_data = &rootpart; 1262 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 1263 } 1264 1265 /* 1266 * sysctl helper function for kern.drivers 1267 */ 1268 static int 1269 sysctl_kern_drivers(SYSCTLFN_ARGS) 1270 { 1271 int error; 1272 size_t buflen; 1273 struct kinfo_drivers kd; 1274 char *start, *where; 1275 const char *dname; 1276 int i; 1277 extern struct devsw_conv *devsw_conv; 1278 extern int max_devsw_convs; 1279 1280 start = where = oldp; 1281 buflen = *oldlenp; 1282 if (where == NULL) { 1283 *oldlenp = max_devsw_convs * sizeof kd; 1284 return 0; 1285 } 1286 1287 /* 1288 * An array of kinfo_drivers structures 1289 */ 1290 error = 0; 1291 sysctl_unlock(); 1292 mutex_enter(&device_lock); 1293 for (i = 0; i < max_devsw_convs; i++) { 1294 dname = devsw_conv[i].d_name; 1295 if (dname == NULL) 1296 continue; 1297 if (buflen < sizeof kd) { 1298 error = ENOMEM; 1299 break; 1300 } 1301 memset(&kd, 0, sizeof(kd)); 1302 kd.d_bmajor = devsw_conv[i].d_bmajor; 1303 kd.d_cmajor = devsw_conv[i].d_cmajor; 1304 strlcpy(kd.d_name, dname, sizeof kd.d_name); 1305 mutex_exit(&device_lock); 1306 error = dcopyout(l, &kd, where, sizeof kd); 1307 mutex_enter(&device_lock); 1308 if (error != 0) 1309 break; 1310 buflen -= sizeof kd; 1311 where += sizeof kd; 1312 } 1313 mutex_exit(&device_lock); 1314 sysctl_relock(); 1315 *oldlenp = where - start; 1316 return error; 1317 } 1318 1319 static int 1320 sysctl_security_setidcore(SYSCTLFN_ARGS) 1321 { 1322 int newsize, error; 1323 struct sysctlnode node; 1324 1325 node = *rnode; 1326 node.sysctl_data = &newsize; 1327 newsize = *(int *)rnode->sysctl_data; 1328 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1329 if (error || newp == NULL) 1330 return error; 1331 1332 if (kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_SETIDCORE, 1333 0, NULL, NULL, NULL)) 1334 return (EPERM); 1335 1336 *(int *)rnode->sysctl_data = newsize; 1337 1338 return 0; 1339 } 1340 1341 static int 1342 sysctl_security_setidcorename(SYSCTLFN_ARGS) 1343 { 1344 int error; 1345 char *newsetidcorename; 1346 struct sysctlnode node; 1347 1348 newsetidcorename = PNBUF_GET(); 1349 node = *rnode; 1350 node.sysctl_data = newsetidcorename; 1351 memcpy(node.sysctl_data, rnode->sysctl_data, MAXPATHLEN); 1352 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1353 if (error || newp == NULL) { 1354 goto out; 1355 } 1356 if (kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_SETIDCORE, 1357 0, NULL, NULL, NULL)) { 1358 error = EPERM; 1359 goto out; 1360 } 1361 if (strlen(newsetidcorename) == 0) { 1362 error = EINVAL; 1363 goto out; 1364 } 1365 memcpy(rnode->sysctl_data, node.sysctl_data, MAXPATHLEN); 1366 out: 1367 PNBUF_PUT(newsetidcorename); 1368 return error; 1369 } 1370 1371 /* 1372 * sysctl helper routine for kern.cp_id node. Maps cpus to their 1373 * cpuids. 1374 */ 1375 static int 1376 sysctl_kern_cpid(SYSCTLFN_ARGS) 1377 { 1378 struct sysctlnode node = *rnode; 1379 uint64_t *cp_id = NULL; 1380 int error, n = ncpu; 1381 struct cpu_info *ci; 1382 CPU_INFO_ITERATOR cii; 1383 1384 /* 1385 * Here you may either retrieve a single cpu id or the whole 1386 * set. The size you get back when probing depends on what 1387 * you ask for. 1388 */ 1389 switch (namelen) { 1390 case 0: 1391 node.sysctl_size = n * sizeof(uint64_t); 1392 n = -2; /* ALL */ 1393 break; 1394 case 1: 1395 if (name[0] < 0 || name[0] >= n) 1396 return (ENOENT); /* ENOSUCHPROCESSOR */ 1397 node.sysctl_size = sizeof(uint64_t); 1398 n = name[0]; 1399 /* 1400 * adjust these so that sysctl_lookup() will be happy 1401 */ 1402 name++; 1403 namelen--; 1404 break; 1405 default: 1406 return (EINVAL); 1407 } 1408 1409 cp_id = kmem_alloc(node.sysctl_size, KM_SLEEP); 1410 node.sysctl_data = cp_id; 1411 memset(cp_id, 0, node.sysctl_size); 1412 1413 for (CPU_INFO_FOREACH(cii, ci)) { 1414 if (n <= 0) 1415 cp_id[0] = cpu_index(ci); 1416 /* 1417 * if a specific processor was requested and we just 1418 * did it, we're done here 1419 */ 1420 if (n == 0) 1421 break; 1422 /* 1423 * if doing "all", skip to next cp_id slot for next processor 1424 */ 1425 if (n == -2) 1426 cp_id++; 1427 /* 1428 * if we're doing a specific processor, we're one 1429 * processor closer 1430 */ 1431 if (n > 0) 1432 n--; 1433 } 1434 1435 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1436 kmem_free(node.sysctl_data, node.sysctl_size); 1437 return (error); 1438 } 1439 1440 /* 1441 * sysctl helper routine for hw.usermem and hw.usermem64. Values are 1442 * calculate on the fly taking into account integer overflow and the 1443 * current wired count. 1444 */ 1445 static int 1446 sysctl_hw_usermem(SYSCTLFN_ARGS) 1447 { 1448 u_int ui; 1449 u_quad_t uq; 1450 struct sysctlnode node; 1451 1452 node = *rnode; 1453 switch (rnode->sysctl_num) { 1454 case HW_USERMEM: 1455 if ((ui = physmem - uvmexp.wired) > (UINT_MAX / PAGE_SIZE)) 1456 ui = UINT_MAX; 1457 else 1458 ui *= PAGE_SIZE; 1459 node.sysctl_data = &ui; 1460 break; 1461 case HW_USERMEM64: 1462 uq = (u_quad_t)(physmem - uvmexp.wired) * PAGE_SIZE; 1463 node.sysctl_data = &uq; 1464 break; 1465 default: 1466 return (EINVAL); 1467 } 1468 1469 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 1470 } 1471 1472 /* 1473 * sysctl helper routine for kern.cnmagic node. Pulls the old value 1474 * out, encoded, and stuffs the new value in for decoding. 1475 */ 1476 static int 1477 sysctl_hw_cnmagic(SYSCTLFN_ARGS) 1478 { 1479 char magic[CNS_LEN]; 1480 int error; 1481 struct sysctlnode node; 1482 1483 if (oldp) 1484 cn_get_magic(magic, CNS_LEN); 1485 node = *rnode; 1486 node.sysctl_data = &magic[0]; 1487 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1488 if (error || newp == NULL) 1489 return (error); 1490 1491 return (cn_set_magic(magic)); 1492 } 1493 1494 /* 1495 * ******************************************************************** 1496 * section 3: public helper routines that are used for more than one 1497 * node 1498 * ******************************************************************** 1499 */ 1500 1501 /* 1502 * sysctl helper routine for the kern.root_device node and some ports' 1503 * machdep.root_device nodes. 1504 */ 1505 int 1506 sysctl_root_device(SYSCTLFN_ARGS) 1507 { 1508 struct sysctlnode node; 1509 1510 node = *rnode; 1511 node.sysctl_data = __UNCONST(device_xname(root_device)); 1512 node.sysctl_size = strlen(device_xname(root_device)) + 1; 1513 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 1514 } 1515 1516 /* 1517 * sysctl helper routine for kern.consdev, dependent on the current 1518 * state of the console. Also used for machdep.console_device on some 1519 * ports. 1520 */ 1521 int 1522 sysctl_consdev(SYSCTLFN_ARGS) 1523 { 1524 dev_t consdev; 1525 uint32_t oconsdev; 1526 struct sysctlnode node; 1527 1528 if (cn_tab != NULL) 1529 consdev = cn_tab->cn_dev; 1530 else 1531 consdev = NODEV; 1532 node = *rnode; 1533 switch (*oldlenp) { 1534 case sizeof(consdev): 1535 node.sysctl_data = &consdev; 1536 node.sysctl_size = sizeof(consdev); 1537 break; 1538 case sizeof(oconsdev): 1539 oconsdev = (uint32_t)consdev; 1540 node.sysctl_data = &oconsdev; 1541 node.sysctl_size = sizeof(oconsdev); 1542 break; 1543 default: 1544 return EINVAL; 1545 } 1546 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 1547 } 1548 1549 /* 1550 * ******************************************************************** 1551 * section 4: support for some helpers 1552 * ******************************************************************** 1553 */ 1554 1555 1556 /* 1557 * Fill in a kinfo_lwp structure for the specified lwp. 1558 */ 1559 static void 1560 fill_lwp(struct lwp *l, struct kinfo_lwp *kl) 1561 { 1562 struct proc *p = l->l_proc; 1563 struct timeval tv; 1564 1565 KASSERT(lwp_locked(l, NULL)); 1566 1567 memset(kl, 0, sizeof(*kl)); 1568 1569 kl->l_forw = 0; 1570 kl->l_back = 0; 1571 kl->l_laddr = PTRTOUINT64(l); 1572 kl->l_addr = PTRTOUINT64(l->l_addr); 1573 kl->l_stat = l->l_stat; 1574 kl->l_lid = l->l_lid; 1575 kl->l_flag = L_INMEM; 1576 kl->l_flag |= sysctl_map_flags(sysctl_lwpprflagmap, l->l_prflag); 1577 kl->l_flag |= sysctl_map_flags(sysctl_lwpflagmap, l->l_flag); 1578 1579 kl->l_swtime = l->l_swtime; 1580 kl->l_slptime = l->l_slptime; 1581 if (l->l_stat == LSONPROC) 1582 kl->l_schedflags = l->l_cpu->ci_schedstate.spc_flags; 1583 else 1584 kl->l_schedflags = 0; 1585 kl->l_priority = lwp_eprio(l); 1586 kl->l_usrpri = l->l_priority; 1587 if (l->l_wchan) 1588 strncpy(kl->l_wmesg, l->l_wmesg, sizeof(kl->l_wmesg)); 1589 kl->l_wchan = PTRTOUINT64(l->l_wchan); 1590 kl->l_cpuid = cpu_index(l->l_cpu); 1591 bintime2timeval(&l->l_rtime, &tv); 1592 kl->l_rtime_sec = tv.tv_sec; 1593 kl->l_rtime_usec = tv.tv_usec; 1594 kl->l_cpticks = l->l_cpticks; 1595 kl->l_pctcpu = l->l_pctcpu; 1596 kl->l_pid = p->p_pid; 1597 if (l->l_name == NULL) 1598 kl->l_name[0] = '\0'; 1599 else 1600 strlcpy(kl->l_name, l->l_name, sizeof(kl->l_name)); 1601 } 1602