init_sysctl.c revision 1.209
1 /* $NetBSD: init_sysctl.c,v 1.209 2015/08/25 14:52:31 pooka 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 1.209 2015/08/25 14:52:31 pooka 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_misc_setup, "sysctl hw subtree misc setup") 611 { 612 613 sysctl_createv(clog, 0, NULL, NULL, 614 CTLFLAG_PERMANENT, 615 CTLTYPE_INT, "usermem", 616 SYSCTL_DESCR("Bytes of non-kernel memory"), 617 sysctl_hw_usermem, 0, NULL, 0, 618 CTL_HW, HW_USERMEM, CTL_EOL); 619 sysctl_createv(clog, 0, NULL, NULL, 620 CTLFLAG_PERMANENT|CTLFLAG_READWRITE|CTLFLAG_HEX, 621 CTLTYPE_STRING, "cnmagic", 622 SYSCTL_DESCR("Console magic key sequence"), 623 sysctl_hw_cnmagic, 0, NULL, CNS_LEN, 624 CTL_HW, HW_CNMAGIC, CTL_EOL); 625 sysctl_createv(clog, 0, NULL, NULL, 626 CTLFLAG_PERMANENT, 627 CTLTYPE_QUAD, "usermem64", 628 SYSCTL_DESCR("Bytes of non-kernel memory"), 629 sysctl_hw_usermem, 0, NULL, 0, 630 CTL_HW, HW_USERMEM64, CTL_EOL); 631 } 632 633 #ifdef DEBUG 634 /* 635 * Debugging related system variables. 636 */ 637 struct ctldebug /* debug0, */ /* debug1, */ debug2, debug3, debug4; 638 struct ctldebug debug5, debug6, debug7, debug8, debug9; 639 struct ctldebug debug10, debug11, debug12, debug13, debug14; 640 struct ctldebug debug15, debug16, debug17, debug18, debug19; 641 static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = { 642 &debug0, &debug1, &debug2, &debug3, &debug4, 643 &debug5, &debug6, &debug7, &debug8, &debug9, 644 &debug10, &debug11, &debug12, &debug13, &debug14, 645 &debug15, &debug16, &debug17, &debug18, &debug19, 646 }; 647 648 /* 649 * this setup routine is a replacement for debug_sysctl() 650 * 651 * note that it creates several nodes per defined debug variable 652 */ 653 SYSCTL_SETUP(sysctl_debug_setup, "sysctl debug subtree setup") 654 { 655 struct ctldebug *cdp; 656 char nodename[20]; 657 int i; 658 659 /* 660 * two ways here: 661 * 662 * the "old" way (debug.name -> value) which was emulated by 663 * the sysctl(8) binary 664 * 665 * the new way, which the sysctl(8) binary was actually using 666 667 node debug 668 node debug.0 669 string debug.0.name 670 int debug.0.value 671 int debug.name 672 673 */ 674 675 for (i = 0; i < CTL_DEBUG_MAXID; i++) { 676 cdp = debugvars[i]; 677 if (cdp->debugname == NULL || cdp->debugvar == NULL) 678 continue; 679 680 snprintf(nodename, sizeof(nodename), "debug%d", i); 681 sysctl_createv(clog, 0, NULL, NULL, 682 CTLFLAG_PERMANENT|CTLFLAG_HIDDEN, 683 CTLTYPE_NODE, nodename, NULL, 684 NULL, 0, NULL, 0, 685 CTL_DEBUG, i, CTL_EOL); 686 sysctl_createv(clog, 0, NULL, NULL, 687 CTLFLAG_PERMANENT|CTLFLAG_HIDDEN, 688 CTLTYPE_STRING, "name", NULL, 689 /*XXXUNCONST*/ 690 NULL, 0, __UNCONST(cdp->debugname), 0, 691 CTL_DEBUG, i, CTL_DEBUG_NAME, CTL_EOL); 692 sysctl_createv(clog, 0, NULL, NULL, 693 CTLFLAG_PERMANENT|CTLFLAG_HIDDEN, 694 CTLTYPE_INT, "value", NULL, 695 NULL, 0, cdp->debugvar, 0, 696 CTL_DEBUG, i, CTL_DEBUG_VALUE, CTL_EOL); 697 sysctl_createv(clog, 0, NULL, NULL, 698 CTLFLAG_PERMANENT, 699 CTLTYPE_INT, cdp->debugname, NULL, 700 NULL, 0, cdp->debugvar, 0, 701 CTL_DEBUG, CTL_CREATE, CTL_EOL); 702 } 703 } 704 #endif /* DEBUG */ 705 706 /* 707 * ******************************************************************** 708 * section 2: private node-specific helper routines. 709 * ******************************************************************** 710 */ 711 712 #ifdef DIAGNOSTIC 713 static int 714 sysctl_kern_trigger_panic(SYSCTLFN_ARGS) 715 { 716 int newtrig, error; 717 struct sysctlnode node; 718 719 newtrig = 0; 720 node = *rnode; 721 node.sysctl_data = &newtrig; 722 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 723 if (error || newp == NULL) 724 return (error); 725 726 if (newtrig != 0) 727 panic("Panic triggered"); 728 729 return (error); 730 } 731 #endif 732 733 /* 734 * sysctl helper routine for kern.maxvnodes. Drain vnodes if 735 * new value is lower than desiredvnodes and then calls reinit 736 * routines that needs to adjust to the new value. 737 */ 738 static int 739 sysctl_kern_maxvnodes(SYSCTLFN_ARGS) 740 { 741 int error, new_vnodes, old_vnodes, new_max; 742 struct sysctlnode node; 743 744 new_vnodes = desiredvnodes; 745 node = *rnode; 746 node.sysctl_data = &new_vnodes; 747 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 748 if (error || newp == NULL) 749 return (error); 750 751 /* 752 * sysctl passes down unsigned values, require them 753 * to be positive 754 */ 755 if (new_vnodes <= 0) 756 return (EINVAL); 757 758 /* Limits: 75% of kmem and physical memory. */ 759 new_max = calc_cache_size(vmem_size(kmem_arena, VMEM_FREE|VMEM_ALLOC), 760 75, 75) / VNODE_COST; 761 if (new_vnodes > new_max) 762 new_vnodes = new_max; 763 764 old_vnodes = desiredvnodes; 765 desiredvnodes = new_vnodes; 766 error = vfs_drainvnodes(new_vnodes); 767 if (error) { 768 desiredvnodes = old_vnodes; 769 return (error); 770 } 771 vfs_reinit(); 772 nchreinit(); 773 774 return (0); 775 } 776 777 /* 778 * sysctl helper routine for rtc_offset - set time after changes 779 */ 780 static int 781 sysctl_kern_rtc_offset(SYSCTLFN_ARGS) 782 { 783 struct timespec ts, delta; 784 int error, new_rtc_offset; 785 struct sysctlnode node; 786 787 new_rtc_offset = rtc_offset; 788 node = *rnode; 789 node.sysctl_data = &new_rtc_offset; 790 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 791 if (error || newp == NULL) 792 return (error); 793 794 if (kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_TIME, 795 KAUTH_REQ_SYSTEM_TIME_RTCOFFSET, 796 KAUTH_ARG(new_rtc_offset), NULL, NULL)) 797 return (EPERM); 798 if (rtc_offset == new_rtc_offset) 799 return (0); 800 801 /* if we change the offset, adjust the time */ 802 nanotime(&ts); 803 delta.tv_sec = 60 * (new_rtc_offset - rtc_offset); 804 delta.tv_nsec = 0; 805 timespecadd(&ts, &delta, &ts); 806 rtc_offset = new_rtc_offset; 807 return (settime(l->l_proc, &ts)); 808 } 809 810 /* 811 * sysctl helper routine for kern.maxproc. Ensures that the new 812 * values are not too low or too high. 813 */ 814 static int 815 sysctl_kern_maxproc(SYSCTLFN_ARGS) 816 { 817 int error, nmaxproc; 818 struct sysctlnode node; 819 820 nmaxproc = maxproc; 821 node = *rnode; 822 node.sysctl_data = &nmaxproc; 823 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 824 if (error || newp == NULL) 825 return (error); 826 827 if (nmaxproc < 0 || nmaxproc >= PID_MAX) 828 return (EINVAL); 829 #ifdef __HAVE_CPU_MAXPROC 830 if (nmaxproc > cpu_maxproc()) 831 return (EINVAL); 832 #endif 833 maxproc = nmaxproc; 834 835 return (0); 836 } 837 838 /* 839 * sysctl helper function for kern.hostid. The hostid is a long, but 840 * we export it as an int, so we need to give it a little help. 841 */ 842 static int 843 sysctl_kern_hostid(SYSCTLFN_ARGS) 844 { 845 int error, inthostid; 846 struct sysctlnode node; 847 848 inthostid = hostid; /* XXX assumes sizeof int <= sizeof long */ 849 node = *rnode; 850 node.sysctl_data = &inthostid; 851 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 852 if (error || newp == NULL) 853 return (error); 854 855 hostid = (unsigned)inthostid; 856 857 return (0); 858 } 859 860 /* 861 * sysctl helper routine for kern.defcorename. In the case of a new 862 * string being assigned, check that it's not a zero-length string. 863 * (XXX the check in -current doesn't work, but do we really care?) 864 */ 865 static int 866 sysctl_kern_defcorename(SYSCTLFN_ARGS) 867 { 868 int error; 869 char *newcorename; 870 struct sysctlnode node; 871 872 newcorename = PNBUF_GET(); 873 node = *rnode; 874 node.sysctl_data = &newcorename[0]; 875 memcpy(node.sysctl_data, rnode->sysctl_data, MAXPATHLEN); 876 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 877 if (error || newp == NULL) { 878 goto done; 879 } 880 881 /* 882 * when sysctl_lookup() deals with a string, it's guaranteed 883 * to come back nul terminated. So there. :) 884 */ 885 if (strlen(newcorename) == 0) { 886 error = EINVAL; 887 } else { 888 memcpy(rnode->sysctl_data, node.sysctl_data, MAXPATHLEN); 889 error = 0; 890 } 891 done: 892 PNBUF_PUT(newcorename); 893 return error; 894 } 895 896 /* 897 * sysctl helper routine for kern.cp_time node. Adds up cpu time 898 * across all cpus. 899 */ 900 static int 901 sysctl_kern_cptime(SYSCTLFN_ARGS) 902 { 903 struct sysctlnode node = *rnode; 904 uint64_t *cp_time = NULL; 905 int error, n = ncpu, i; 906 struct cpu_info *ci; 907 CPU_INFO_ITERATOR cii; 908 909 /* 910 * if you specifically pass a buffer that is the size of the 911 * sum, or if you are probing for the size, you get the "sum" 912 * of cp_time (and the size thereof) across all processors. 913 * 914 * alternately, you can pass an additional mib number and get 915 * cp_time for that particular processor. 916 */ 917 switch (namelen) { 918 case 0: 919 if (*oldlenp == sizeof(uint64_t) * CPUSTATES || oldp == NULL) { 920 node.sysctl_size = sizeof(uint64_t) * CPUSTATES; 921 n = -1; /* SUM */ 922 } 923 else { 924 node.sysctl_size = n * sizeof(uint64_t) * CPUSTATES; 925 n = -2; /* ALL */ 926 } 927 break; 928 case 1: 929 if (name[0] < 0 || name[0] >= n) 930 return (ENOENT); /* ENOSUCHPROCESSOR */ 931 node.sysctl_size = sizeof(uint64_t) * CPUSTATES; 932 n = name[0]; 933 /* 934 * adjust these so that sysctl_lookup() will be happy 935 */ 936 name++; 937 namelen--; 938 break; 939 default: 940 return (EINVAL); 941 } 942 943 cp_time = kmem_alloc(node.sysctl_size, KM_SLEEP); 944 if (cp_time == NULL) 945 return (ENOMEM); 946 node.sysctl_data = cp_time; 947 memset(cp_time, 0, node.sysctl_size); 948 949 for (CPU_INFO_FOREACH(cii, ci)) { 950 if (n <= 0) { 951 for (i = 0; i < CPUSTATES; i++) { 952 cp_time[i] += ci->ci_schedstate.spc_cp_time[i]; 953 } 954 } 955 /* 956 * if a specific processor was requested and we just 957 * did it, we're done here 958 */ 959 if (n == 0) 960 break; 961 /* 962 * if doing "all", skip to next cp_time set for next processor 963 */ 964 if (n == -2) 965 cp_time += CPUSTATES; 966 /* 967 * if we're doing a specific processor, we're one 968 * processor closer 969 */ 970 if (n > 0) 971 n--; 972 } 973 974 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 975 kmem_free(node.sysctl_data, node.sysctl_size); 976 return (error); 977 } 978 979 #if NPTY > 0 980 /* 981 * sysctl helper routine for kern.maxptys. Ensures that any new value 982 * is acceptable to the pty subsystem. 983 */ 984 static int 985 sysctl_kern_maxptys(SYSCTLFN_ARGS) 986 { 987 int pty_maxptys(int, int); /* defined in kern/tty_pty.c */ 988 int error, xmax; 989 struct sysctlnode node; 990 991 /* get current value of maxptys */ 992 xmax = pty_maxptys(0, 0); 993 994 node = *rnode; 995 node.sysctl_data = &xmax; 996 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 997 if (error || newp == NULL) 998 return (error); 999 1000 if (xmax != pty_maxptys(xmax, 1)) 1001 return (EINVAL); 1002 1003 return (0); 1004 } 1005 #endif /* NPTY > 0 */ 1006 1007 /* 1008 * sysctl helper routine to do kern.lwp.* work. 1009 */ 1010 static int 1011 sysctl_kern_lwp(SYSCTLFN_ARGS) 1012 { 1013 struct kinfo_lwp klwp; 1014 struct proc *p; 1015 struct lwp *l2, *l3; 1016 char *where, *dp; 1017 int pid, elem_size, elem_count; 1018 int buflen, needed, error; 1019 bool gotit; 1020 1021 if (namelen == 1 && name[0] == CTL_QUERY) 1022 return (sysctl_query(SYSCTLFN_CALL(rnode))); 1023 1024 dp = where = oldp; 1025 buflen = where != NULL ? *oldlenp : 0; 1026 error = needed = 0; 1027 1028 if (newp != NULL || namelen != 3) 1029 return (EINVAL); 1030 pid = name[0]; 1031 elem_size = name[1]; 1032 elem_count = name[2]; 1033 1034 sysctl_unlock(); 1035 if (pid == -1) { 1036 mutex_enter(proc_lock); 1037 PROCLIST_FOREACH(p, &allproc) { 1038 /* Grab a hold on the process. */ 1039 if (!rw_tryenter(&p->p_reflock, RW_READER)) { 1040 continue; 1041 } 1042 mutex_exit(proc_lock); 1043 1044 mutex_enter(p->p_lock); 1045 LIST_FOREACH(l2, &p->p_lwps, l_sibling) { 1046 if (buflen >= elem_size && elem_count > 0) { 1047 lwp_lock(l2); 1048 fill_lwp(l2, &klwp); 1049 lwp_unlock(l2); 1050 mutex_exit(p->p_lock); 1051 1052 /* 1053 * Copy out elem_size, but not 1054 * larger than the size of a 1055 * struct kinfo_proc2. 1056 */ 1057 error = dcopyout(l, &klwp, dp, 1058 min(sizeof(klwp), elem_size)); 1059 if (error) { 1060 rw_exit(&p->p_reflock); 1061 goto cleanup; 1062 } 1063 mutex_enter(p->p_lock); 1064 LIST_FOREACH(l3, &p->p_lwps, 1065 l_sibling) { 1066 if (l2 == l3) 1067 break; 1068 } 1069 if (l3 == NULL) { 1070 mutex_exit(p->p_lock); 1071 rw_exit(&p->p_reflock); 1072 error = EAGAIN; 1073 goto cleanup; 1074 } 1075 dp += elem_size; 1076 buflen -= elem_size; 1077 elem_count--; 1078 } 1079 needed += elem_size; 1080 } 1081 mutex_exit(p->p_lock); 1082 1083 /* Drop reference to process. */ 1084 mutex_enter(proc_lock); 1085 rw_exit(&p->p_reflock); 1086 } 1087 mutex_exit(proc_lock); 1088 } else { 1089 mutex_enter(proc_lock); 1090 p = proc_find(pid); 1091 if (p == NULL) { 1092 error = ESRCH; 1093 mutex_exit(proc_lock); 1094 goto cleanup; 1095 } 1096 /* Grab a hold on the process. */ 1097 gotit = rw_tryenter(&p->p_reflock, RW_READER); 1098 mutex_exit(proc_lock); 1099 if (!gotit) { 1100 error = ESRCH; 1101 goto cleanup; 1102 } 1103 1104 mutex_enter(p->p_lock); 1105 LIST_FOREACH(l2, &p->p_lwps, l_sibling) { 1106 if (buflen >= elem_size && elem_count > 0) { 1107 lwp_lock(l2); 1108 fill_lwp(l2, &klwp); 1109 lwp_unlock(l2); 1110 mutex_exit(p->p_lock); 1111 /* 1112 * Copy out elem_size, but not larger than 1113 * the size of a struct kinfo_proc2. 1114 */ 1115 error = dcopyout(l, &klwp, dp, 1116 min(sizeof(klwp), elem_size)); 1117 if (error) { 1118 rw_exit(&p->p_reflock); 1119 goto cleanup; 1120 } 1121 mutex_enter(p->p_lock); 1122 LIST_FOREACH(l3, &p->p_lwps, 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 rw_exit(&p->p_reflock); 1142 } 1143 1144 if (where != NULL) { 1145 *oldlenp = dp - where; 1146 if (needed > *oldlenp) { 1147 sysctl_relock(); 1148 return (ENOMEM); 1149 } 1150 } else { 1151 needed += KERN_LWPSLOP; 1152 *oldlenp = needed; 1153 } 1154 error = 0; 1155 cleanup: 1156 sysctl_relock(); 1157 return (error); 1158 } 1159 1160 /* 1161 * sysctl helper routine for kern.forkfsleep node. Ensures that the 1162 * given value is not too large or two small, and is at least one 1163 * timer tick if not zero. 1164 */ 1165 static int 1166 sysctl_kern_forkfsleep(SYSCTLFN_ARGS) 1167 { 1168 /* userland sees value in ms, internally is in ticks */ 1169 extern int forkfsleep; /* defined in kern/kern_fork.c */ 1170 int error, timo, lsleep; 1171 struct sysctlnode node; 1172 1173 lsleep = forkfsleep * 1000 / hz; 1174 node = *rnode; 1175 node.sysctl_data = &lsleep; 1176 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1177 if (error || newp == NULL) 1178 return (error); 1179 1180 /* refuse negative values, and overly 'long time' */ 1181 if (lsleep < 0 || lsleep > MAXSLP * 1000) 1182 return (EINVAL); 1183 1184 timo = mstohz(lsleep); 1185 1186 /* if the interval is >0 ms && <1 tick, use 1 tick */ 1187 if (lsleep != 0 && timo == 0) 1188 forkfsleep = 1; 1189 else 1190 forkfsleep = timo; 1191 1192 return (0); 1193 } 1194 1195 /* 1196 * sysctl helper routine for kern.root_partition 1197 */ 1198 static int 1199 sysctl_kern_root_partition(SYSCTLFN_ARGS) 1200 { 1201 int rootpart = DISKPART(rootdev); 1202 struct sysctlnode node = *rnode; 1203 1204 node.sysctl_data = &rootpart; 1205 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 1206 } 1207 1208 /* 1209 * sysctl helper function for kern.drivers 1210 */ 1211 static int 1212 sysctl_kern_drivers(SYSCTLFN_ARGS) 1213 { 1214 int error; 1215 size_t buflen; 1216 struct kinfo_drivers kd; 1217 char *start, *where; 1218 const char *dname; 1219 int i; 1220 extern struct devsw_conv *devsw_conv; 1221 extern int max_devsw_convs; 1222 1223 start = where = oldp; 1224 buflen = *oldlenp; 1225 if (where == NULL) { 1226 *oldlenp = max_devsw_convs * sizeof kd; 1227 return 0; 1228 } 1229 1230 /* 1231 * An array of kinfo_drivers structures 1232 */ 1233 error = 0; 1234 sysctl_unlock(); 1235 mutex_enter(&device_lock); 1236 for (i = 0; i < max_devsw_convs; i++) { 1237 dname = devsw_conv[i].d_name; 1238 if (dname == NULL) 1239 continue; 1240 if (buflen < sizeof kd) { 1241 error = ENOMEM; 1242 break; 1243 } 1244 memset(&kd, 0, sizeof(kd)); 1245 kd.d_bmajor = devsw_conv[i].d_bmajor; 1246 kd.d_cmajor = devsw_conv[i].d_cmajor; 1247 strlcpy(kd.d_name, dname, sizeof kd.d_name); 1248 mutex_exit(&device_lock); 1249 error = dcopyout(l, &kd, where, sizeof kd); 1250 mutex_enter(&device_lock); 1251 if (error != 0) 1252 break; 1253 buflen -= sizeof kd; 1254 where += sizeof kd; 1255 } 1256 mutex_exit(&device_lock); 1257 sysctl_relock(); 1258 *oldlenp = where - start; 1259 return error; 1260 } 1261 1262 static int 1263 sysctl_security_setidcore(SYSCTLFN_ARGS) 1264 { 1265 int newsize, error; 1266 struct sysctlnode node; 1267 1268 node = *rnode; 1269 node.sysctl_data = &newsize; 1270 newsize = *(int *)rnode->sysctl_data; 1271 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1272 if (error || newp == NULL) 1273 return error; 1274 1275 if (kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_SETIDCORE, 1276 0, NULL, NULL, NULL)) 1277 return (EPERM); 1278 1279 *(int *)rnode->sysctl_data = newsize; 1280 1281 return 0; 1282 } 1283 1284 static int 1285 sysctl_security_setidcorename(SYSCTLFN_ARGS) 1286 { 1287 int error; 1288 char *newsetidcorename; 1289 struct sysctlnode node; 1290 1291 newsetidcorename = PNBUF_GET(); 1292 node = *rnode; 1293 node.sysctl_data = newsetidcorename; 1294 memcpy(node.sysctl_data, rnode->sysctl_data, MAXPATHLEN); 1295 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1296 if (error || newp == NULL) { 1297 goto out; 1298 } 1299 if (kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_SETIDCORE, 1300 0, NULL, NULL, NULL)) { 1301 error = EPERM; 1302 goto out; 1303 } 1304 if (strlen(newsetidcorename) == 0) { 1305 error = EINVAL; 1306 goto out; 1307 } 1308 memcpy(rnode->sysctl_data, node.sysctl_data, MAXPATHLEN); 1309 out: 1310 PNBUF_PUT(newsetidcorename); 1311 return error; 1312 } 1313 1314 /* 1315 * sysctl helper routine for kern.cp_id node. Maps cpus to their 1316 * cpuids. 1317 */ 1318 static int 1319 sysctl_kern_cpid(SYSCTLFN_ARGS) 1320 { 1321 struct sysctlnode node = *rnode; 1322 uint64_t *cp_id = NULL; 1323 int error, n = ncpu; 1324 struct cpu_info *ci; 1325 CPU_INFO_ITERATOR cii; 1326 1327 /* 1328 * Here you may either retrieve a single cpu id or the whole 1329 * set. The size you get back when probing depends on what 1330 * you ask for. 1331 */ 1332 switch (namelen) { 1333 case 0: 1334 node.sysctl_size = n * sizeof(uint64_t); 1335 n = -2; /* ALL */ 1336 break; 1337 case 1: 1338 if (name[0] < 0 || name[0] >= n) 1339 return (ENOENT); /* ENOSUCHPROCESSOR */ 1340 node.sysctl_size = sizeof(uint64_t); 1341 n = name[0]; 1342 /* 1343 * adjust these so that sysctl_lookup() will be happy 1344 */ 1345 name++; 1346 namelen--; 1347 break; 1348 default: 1349 return (EINVAL); 1350 } 1351 1352 cp_id = kmem_alloc(node.sysctl_size, KM_SLEEP); 1353 if (cp_id == NULL) 1354 return (ENOMEM); 1355 node.sysctl_data = cp_id; 1356 memset(cp_id, 0, node.sysctl_size); 1357 1358 for (CPU_INFO_FOREACH(cii, ci)) { 1359 if (n <= 0) 1360 cp_id[0] = cpu_index(ci); 1361 /* 1362 * if a specific processor was requested and we just 1363 * did it, we're done here 1364 */ 1365 if (n == 0) 1366 break; 1367 /* 1368 * if doing "all", skip to next cp_id slot for next processor 1369 */ 1370 if (n == -2) 1371 cp_id++; 1372 /* 1373 * if we're doing a specific processor, we're one 1374 * processor closer 1375 */ 1376 if (n > 0) 1377 n--; 1378 } 1379 1380 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1381 kmem_free(node.sysctl_data, node.sysctl_size); 1382 return (error); 1383 } 1384 1385 /* 1386 * sysctl helper routine for hw.usermem and hw.usermem64. Values are 1387 * calculate on the fly taking into account integer overflow and the 1388 * current wired count. 1389 */ 1390 static int 1391 sysctl_hw_usermem(SYSCTLFN_ARGS) 1392 { 1393 u_int ui; 1394 u_quad_t uq; 1395 struct sysctlnode node; 1396 1397 node = *rnode; 1398 switch (rnode->sysctl_num) { 1399 case HW_USERMEM: 1400 if ((ui = physmem - uvmexp.wired) > (UINT_MAX / PAGE_SIZE)) 1401 ui = UINT_MAX; 1402 else 1403 ui *= PAGE_SIZE; 1404 node.sysctl_data = &ui; 1405 break; 1406 case HW_USERMEM64: 1407 uq = (u_quad_t)(physmem - uvmexp.wired) * PAGE_SIZE; 1408 node.sysctl_data = &uq; 1409 break; 1410 default: 1411 return (EINVAL); 1412 } 1413 1414 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 1415 } 1416 1417 /* 1418 * sysctl helper routine for kern.cnmagic node. Pulls the old value 1419 * out, encoded, and stuffs the new value in for decoding. 1420 */ 1421 static int 1422 sysctl_hw_cnmagic(SYSCTLFN_ARGS) 1423 { 1424 char magic[CNS_LEN]; 1425 int error; 1426 struct sysctlnode node; 1427 1428 if (oldp) 1429 cn_get_magic(magic, CNS_LEN); 1430 node = *rnode; 1431 node.sysctl_data = &magic[0]; 1432 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1433 if (error || newp == NULL) 1434 return (error); 1435 1436 return (cn_set_magic(magic)); 1437 } 1438 1439 /* 1440 * ******************************************************************** 1441 * section 3: public helper routines that are used for more than one 1442 * node 1443 * ******************************************************************** 1444 */ 1445 1446 /* 1447 * sysctl helper routine for the kern.root_device node and some ports' 1448 * machdep.root_device nodes. 1449 */ 1450 int 1451 sysctl_root_device(SYSCTLFN_ARGS) 1452 { 1453 struct sysctlnode node; 1454 1455 node = *rnode; 1456 node.sysctl_data = __UNCONST(device_xname(root_device)); 1457 node.sysctl_size = strlen(device_xname(root_device)) + 1; 1458 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 1459 } 1460 1461 /* 1462 * sysctl helper routine for kern.consdev, dependent on the current 1463 * state of the console. Also used for machdep.console_device on some 1464 * ports. 1465 */ 1466 int 1467 sysctl_consdev(SYSCTLFN_ARGS) 1468 { 1469 dev_t consdev; 1470 uint32_t oconsdev; 1471 struct sysctlnode node; 1472 1473 if (cn_tab != NULL) 1474 consdev = cn_tab->cn_dev; 1475 else 1476 consdev = NODEV; 1477 node = *rnode; 1478 switch (*oldlenp) { 1479 case sizeof(consdev): 1480 node.sysctl_data = &consdev; 1481 node.sysctl_size = sizeof(consdev); 1482 break; 1483 case sizeof(oconsdev): 1484 oconsdev = (uint32_t)consdev; 1485 node.sysctl_data = &oconsdev; 1486 node.sysctl_size = sizeof(oconsdev); 1487 break; 1488 default: 1489 return EINVAL; 1490 } 1491 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 1492 } 1493 1494 /* 1495 * ******************************************************************** 1496 * section 4: support for some helpers 1497 * ******************************************************************** 1498 */ 1499 1500 1501 /* 1502 * Fill in a kinfo_lwp structure for the specified lwp. 1503 */ 1504 static void 1505 fill_lwp(struct lwp *l, struct kinfo_lwp *kl) 1506 { 1507 struct proc *p = l->l_proc; 1508 struct timeval tv; 1509 1510 KASSERT(lwp_locked(l, NULL)); 1511 1512 memset(kl, 0, sizeof(*kl)); 1513 1514 kl->l_forw = 0; 1515 kl->l_back = 0; 1516 kl->l_laddr = PTRTOUINT64(l); 1517 kl->l_addr = PTRTOUINT64(l->l_addr); 1518 kl->l_stat = l->l_stat; 1519 kl->l_lid = l->l_lid; 1520 kl->l_flag = L_INMEM; 1521 kl->l_flag |= sysctl_map_flags(sysctl_lwpprflagmap, l->l_prflag); 1522 kl->l_flag |= sysctl_map_flags(sysctl_lwpflagmap, l->l_flag); 1523 1524 kl->l_swtime = l->l_swtime; 1525 kl->l_slptime = l->l_slptime; 1526 if (l->l_stat == LSONPROC) 1527 kl->l_schedflags = l->l_cpu->ci_schedstate.spc_flags; 1528 else 1529 kl->l_schedflags = 0; 1530 kl->l_priority = lwp_eprio(l); 1531 kl->l_usrpri = l->l_priority; 1532 if (l->l_wchan) 1533 strncpy(kl->l_wmesg, l->l_wmesg, sizeof(kl->l_wmesg)); 1534 kl->l_wchan = PTRTOUINT64(l->l_wchan); 1535 kl->l_cpuid = cpu_index(l->l_cpu); 1536 bintime2timeval(&l->l_rtime, &tv); 1537 kl->l_rtime_sec = tv.tv_sec; 1538 kl->l_rtime_usec = tv.tv_usec; 1539 kl->l_cpticks = l->l_cpticks; 1540 kl->l_pctcpu = l->l_pctcpu; 1541 kl->l_pid = p->p_pid; 1542 if (l->l_name == NULL) 1543 kl->l_name[0] = '\0'; 1544 else 1545 strlcpy(kl->l_name, l->l_name, sizeof(kl->l_name)); 1546 } 1547
Indexes created Sun Sep 21 20:09:37 GMT 2025