init_sysctl.c revision 1.222
1 /* $NetBSD: init_sysctl.c,v 1.222 2019/01/15 07:11:23 mrg 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 1.222 2019/01/15 07:11:23 mrg Exp $"); 34 35 #include "opt_sysv.h" 36 #include "opt_compat_netbsd.h" 37 #include "opt_modular.h" 38 #include "opt_gprof.h" 39 #include "pty.h" 40 41 #include <sys/types.h> 42 #include <sys/param.h> 43 #include <sys/sysctl.h> 44 #include <sys/cpu.h> 45 #include <sys/errno.h> 46 #include <sys/systm.h> 47 #include <sys/kernel.h> 48 #include <sys/unistd.h> 49 #include <sys/disklabel.h> 50 #include <sys/cprng.h> 51 #include <sys/vnode_impl.h> /* For vfs_drainvnodes(). */ 52 #include <sys/mount.h> 53 #include <sys/namei.h> 54 #include <dev/cons.h> 55 #include <sys/socketvar.h> 56 #include <sys/file.h> 57 #include <sys/filedesc.h> 58 #include <sys/tty.h> 59 #include <sys/kmem.h> 60 #include <sys/reboot.h> 61 #include <sys/resource.h> 62 #include <sys/resourcevar.h> 63 #include <sys/exec.h> 64 #include <sys/conf.h> 65 #include <sys/device.h> 66 #include <sys/stat.h> 67 #include <sys/kauth.h> 68 #include <sys/ktrace.h> 69 70 #include <sys/cpu.h> 71 72 int security_setidcore_dump; 73 char security_setidcore_path[MAXPATHLEN] = "/var/crash/%n.core"; 74 uid_t security_setidcore_owner = 0; 75 gid_t security_setidcore_group = 0; 76 mode_t security_setidcore_mode = (S_IRUSR|S_IWUSR); 77 78 /* 79 * Current status of SysV IPC capability. Initially, these are 80 * 0 if the capability is not built-in to the kernel, but can 81 * be updated if the appropriate kernel module is (auto)loaded. 82 */ 83 84 int kern_has_sysvmsg = 0; 85 int kern_has_sysvshm = 0; 86 int kern_has_sysvsem = 0; 87 88 static const u_int sysctl_lwpprflagmap[] = { 89 LPR_DETACHED, L_DETACHED, 90 0 91 }; 92 93 /* 94 * try over estimating by 5 procs/lwps 95 */ 96 #define KERN_LWPSLOP (5 * sizeof(struct kinfo_lwp)) 97 98 static int dcopyout(struct lwp *, const void *, void *, size_t); 99 100 static int 101 dcopyout(struct lwp *l, const void *kaddr, void *uaddr, size_t len) 102 { 103 int error; 104 105 error = copyout(kaddr, uaddr, len); 106 ktrmibio(-1, UIO_READ, uaddr, len, error); 107 108 return error; 109 } 110 111 static int sysctl_kern_maxvnodes(SYSCTLFN_PROTO); 112 static int sysctl_kern_messages(SYSCTLFN_PROTO); 113 static int sysctl_kern_rtc_offset(SYSCTLFN_PROTO); 114 static int sysctl_kern_maxproc(SYSCTLFN_PROTO); 115 static int sysctl_kern_hostid(SYSCTLFN_PROTO); 116 static int sysctl_kern_defcorename(SYSCTLFN_PROTO); 117 static int sysctl_kern_cptime(SYSCTLFN_PROTO); 118 #if NPTY > 0 119 static int sysctl_kern_maxptys(SYSCTLFN_PROTO); 120 #endif /* NPTY > 0 */ 121 static int sysctl_kern_lwp(SYSCTLFN_PROTO); 122 static int sysctl_kern_forkfsleep(SYSCTLFN_PROTO); 123 static int sysctl_kern_root_partition(SYSCTLFN_PROTO); 124 static int sysctl_kern_drivers(SYSCTLFN_PROTO); 125 static int sysctl_security_setidcore(SYSCTLFN_PROTO); 126 static int sysctl_security_setidcorename(SYSCTLFN_PROTO); 127 static int sysctl_kern_cpid(SYSCTLFN_PROTO); 128 static int sysctl_hw_usermem(SYSCTLFN_PROTO); 129 static int sysctl_hw_cnmagic(SYSCTLFN_PROTO); 130 131 static void fill_lwp(struct lwp *l, struct kinfo_lwp *kl); 132 133 /* 134 * ******************************************************************** 135 * section 1: setup routines 136 * ******************************************************************** 137 * These functions are stuffed into a link set for sysctl setup 138 * functions. They're never called or referenced from anywhere else. 139 * ******************************************************************** 140 */ 141 142 /* 143 * this setup routine is a replacement for kern_sysctl() 144 */ 145 SYSCTL_SETUP(sysctl_kern_setup, "sysctl kern subtree setup") 146 { 147 extern int kern_logsigexit; /* defined in kern/kern_sig.c */ 148 extern fixpt_t ccpu; /* defined in kern/kern_synch.c */ 149 extern int dumponpanic; /* defined in kern/subr_prf.c */ 150 const struct sysctlnode *rnode; 151 152 sysctl_createv(clog, 0, NULL, NULL, 153 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 154 CTLTYPE_INT, "maxvnodes", 155 SYSCTL_DESCR("Maximum number of vnodes"), 156 sysctl_kern_maxvnodes, 0, NULL, 0, 157 CTL_KERN, KERN_MAXVNODES, CTL_EOL); 158 sysctl_createv(clog, 0, NULL, NULL, 159 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 160 CTLTYPE_INT, "maxproc", 161 SYSCTL_DESCR("Maximum number of simultaneous processes"), 162 sysctl_kern_maxproc, 0, NULL, 0, 163 CTL_KERN, KERN_MAXPROC, CTL_EOL); 164 sysctl_createv(clog, 0, NULL, NULL, 165 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 166 CTLTYPE_INT, "maxfiles", 167 SYSCTL_DESCR("Maximum number of open files"), 168 NULL, 0, &maxfiles, 0, 169 CTL_KERN, KERN_MAXFILES, CTL_EOL); 170 sysctl_createv(clog, 0, NULL, NULL, 171 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 172 CTLTYPE_INT, "argmax", 173 SYSCTL_DESCR("Maximum number of bytes of arguments to " 174 "execve(2)"), 175 NULL, ARG_MAX, NULL, 0, 176 CTL_KERN, KERN_ARGMAX, CTL_EOL); 177 sysctl_createv(clog, 0, NULL, NULL, 178 CTLFLAG_PERMANENT|CTLFLAG_READWRITE|CTLFLAG_HEX, 179 CTLTYPE_INT, "hostid", 180 SYSCTL_DESCR("System host ID number"), 181 sysctl_kern_hostid, 0, NULL, 0, 182 CTL_KERN, KERN_HOSTID, CTL_EOL); 183 sysctl_createv(clog, 0, NULL, NULL, 184 CTLFLAG_PERMANENT, 185 CTLTYPE_STRUCT, "vnode", 186 SYSCTL_DESCR("System vnode table"), 187 sysctl_kern_vnode, 0, NULL, 0, 188 CTL_KERN, KERN_VNODE, CTL_EOL); 189 #ifndef GPROF 190 sysctl_createv(clog, 0, NULL, NULL, 191 CTLFLAG_PERMANENT, 192 CTLTYPE_NODE, "profiling", 193 SYSCTL_DESCR("Profiling information (not available)"), 194 sysctl_notavail, 0, NULL, 0, 195 CTL_KERN, KERN_PROF, CTL_EOL); 196 #endif 197 sysctl_createv(clog, 0, NULL, NULL, 198 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 199 CTLTYPE_INT, "posix1version", 200 SYSCTL_DESCR("Version of ISO/IEC 9945 (POSIX 1003.1) " 201 "with which the operating system attempts " 202 "to comply"), 203 NULL, _POSIX_VERSION, NULL, 0, 204 CTL_KERN, KERN_POSIX1, CTL_EOL); 205 sysctl_createv(clog, 0, NULL, NULL, 206 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 207 CTLTYPE_INT, "ngroups", 208 SYSCTL_DESCR("Maximum number of supplemental groups"), 209 NULL, NGROUPS_MAX, NULL, 0, 210 CTL_KERN, KERN_NGROUPS, CTL_EOL); 211 sysctl_createv(clog, 0, NULL, NULL, 212 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 213 CTLTYPE_INT, "job_control", 214 SYSCTL_DESCR("Whether job control is available"), 215 NULL, 1, NULL, 0, 216 CTL_KERN, KERN_JOB_CONTROL, CTL_EOL); 217 sysctl_createv(clog, 0, NULL, NULL, 218 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 219 CTLTYPE_INT, "saved_ids", 220 SYSCTL_DESCR("Whether POSIX saved set-group/user ID is " 221 "available"), NULL, 222 #ifdef _POSIX_SAVED_IDS 223 1, 224 #else /* _POSIX_SAVED_IDS */ 225 0, 226 #endif /* _POSIX_SAVED_IDS */ 227 NULL, 0, CTL_KERN, KERN_SAVED_IDS, CTL_EOL); 228 sysctl_createv(clog, 0, NULL, NULL, 229 CTLFLAG_PERMANENT|CTLFLAG_HEX, 230 CTLTYPE_INT, "boothowto", 231 SYSCTL_DESCR("Flags from boot loader"), 232 NULL, 0, &boothowto, sizeof(boothowto), 233 CTL_KERN, CTL_CREATE, CTL_EOL); 234 sysctl_createv(clog, 0, NULL, NULL, 235 CTLFLAG_PERMANENT, 236 CTLTYPE_STRUCT, "boottime", 237 SYSCTL_DESCR("System boot time"), 238 NULL, 0, &boottime, sizeof(boottime), 239 CTL_KERN, KERN_BOOTTIME, CTL_EOL); 240 sysctl_createv(clog, 0, NULL, NULL, 241 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 242 CTLTYPE_INT, "maxpartitions", 243 SYSCTL_DESCR("Maximum number of partitions allowed per " 244 "disk"), 245 NULL, MAXPARTITIONS, NULL, 0, 246 CTL_KERN, KERN_MAXPARTITIONS, CTL_EOL); 247 sysctl_createv(clog, 0, NULL, NULL, 248 CTLFLAG_PERMANENT, 249 CTLTYPE_STRUCT, "timex", NULL, 250 sysctl_notavail, 0, NULL, 0, 251 CTL_KERN, KERN_TIMEX, CTL_EOL); 252 sysctl_createv(clog, 0, NULL, NULL, 253 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 254 CTLTYPE_INT, "rtc_offset", 255 SYSCTL_DESCR("Offset of real time clock from UTC in " 256 "minutes"), 257 sysctl_kern_rtc_offset, 0, &rtc_offset, 0, 258 CTL_KERN, KERN_RTC_OFFSET, CTL_EOL); 259 sysctl_createv(clog, 0, NULL, NULL, 260 CTLFLAG_PERMANENT, 261 CTLTYPE_STRING, "root_device", 262 SYSCTL_DESCR("Name of the root device"), 263 sysctl_root_device, 0, NULL, 0, 264 CTL_KERN, KERN_ROOT_DEVICE, CTL_EOL); 265 sysctl_createv(clog, 0, NULL, NULL, 266 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 267 CTLTYPE_INT, "fsync", 268 SYSCTL_DESCR("Whether the POSIX 1003.1b File " 269 "Synchronization Option is available on " 270 "this system"), 271 NULL, 1, NULL, 0, 272 CTL_KERN, KERN_FSYNC, CTL_EOL); 273 sysctl_createv(clog, 0, NULL, NULL, 274 CTLFLAG_PERMANENT, 275 CTLTYPE_NODE, "ipc", 276 SYSCTL_DESCR("SysV IPC options"), 277 NULL, 0, NULL, 0, 278 CTL_KERN, KERN_SYSVIPC, CTL_EOL); 279 sysctl_createv(clog, 0, NULL, NULL, 280 CTLFLAG_PERMANENT|CTLFLAG_READONLY, 281 CTLTYPE_INT, "sysvmsg", 282 SYSCTL_DESCR("System V style message support available"), 283 NULL, 0, &kern_has_sysvmsg, sizeof(int), 284 CTL_KERN, KERN_SYSVIPC, KERN_SYSVIPC_MSG, CTL_EOL); 285 sysctl_createv(clog, 0, NULL, NULL, 286 CTLFLAG_PERMANENT|CTLFLAG_READONLY, 287 CTLTYPE_INT, "sysvsem", 288 SYSCTL_DESCR("System V style semaphore support " 289 "available"), 290 NULL, 0, &kern_has_sysvsem, sizeof(int), 291 CTL_KERN, KERN_SYSVIPC, KERN_SYSVIPC_SEM, CTL_EOL); 292 sysctl_createv(clog, 0, NULL, NULL, 293 CTLFLAG_PERMANENT|CTLFLAG_READONLY, 294 CTLTYPE_INT, "sysvshm", 295 SYSCTL_DESCR("System V style shared memory support " 296 "available"), 297 NULL, 0, &kern_has_sysvshm, sizeof(int), 298 CTL_KERN, KERN_SYSVIPC, KERN_SYSVIPC_SHM, CTL_EOL); 299 sysctl_createv(clog, 0, NULL, NULL, 300 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 301 CTLTYPE_INT, "synchronized_io", 302 SYSCTL_DESCR("Whether the POSIX 1003.1b Synchronized " 303 "I/O Option is available on this system"), 304 NULL, 1, NULL, 0, 305 CTL_KERN, KERN_SYNCHRONIZED_IO, CTL_EOL); 306 sysctl_createv(clog, 0, NULL, NULL, 307 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 308 CTLTYPE_INT, "iov_max", 309 SYSCTL_DESCR("Maximum number of iovec structures per " 310 "process"), 311 NULL, IOV_MAX, NULL, 0, 312 CTL_KERN, KERN_IOV_MAX, CTL_EOL); 313 sysctl_createv(clog, 0, NULL, NULL, 314 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 315 CTLTYPE_INT, "mapped_files", 316 SYSCTL_DESCR("Whether the POSIX 1003.1b Memory Mapped " 317 "Files Option is available on this system"), 318 NULL, 1, NULL, 0, 319 CTL_KERN, KERN_MAPPED_FILES, CTL_EOL); 320 sysctl_createv(clog, 0, NULL, NULL, 321 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 322 CTLTYPE_INT, "memlock", 323 SYSCTL_DESCR("Whether the POSIX 1003.1b Process Memory " 324 "Locking Option is available on this " 325 "system"), 326 NULL, 1, NULL, 0, 327 CTL_KERN, KERN_MEMLOCK, CTL_EOL); 328 sysctl_createv(clog, 0, NULL, NULL, 329 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 330 CTLTYPE_INT, "memlock_range", 331 SYSCTL_DESCR("Whether the POSIX 1003.1b Range Memory " 332 "Locking Option is available on this " 333 "system"), 334 NULL, 1, NULL, 0, 335 CTL_KERN, KERN_MEMLOCK_RANGE, CTL_EOL); 336 sysctl_createv(clog, 0, NULL, NULL, 337 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 338 CTLTYPE_INT, "memory_protection", 339 SYSCTL_DESCR("Whether the POSIX 1003.1b Memory " 340 "Protection Option is available on this " 341 "system"), 342 NULL, 1, NULL, 0, 343 CTL_KERN, KERN_MEMORY_PROTECTION, CTL_EOL); 344 sysctl_createv(clog, 0, NULL, NULL, 345 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 346 CTLTYPE_INT, "login_name_max", 347 SYSCTL_DESCR("Maximum login name length"), 348 NULL, LOGIN_NAME_MAX, NULL, 0, 349 CTL_KERN, KERN_LOGIN_NAME_MAX, CTL_EOL); 350 sysctl_createv(clog, 0, NULL, NULL, 351 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 352 CTLTYPE_STRING, "defcorename", 353 SYSCTL_DESCR("Default core file name"), 354 sysctl_kern_defcorename, 0, defcorename, MAXPATHLEN, 355 CTL_KERN, KERN_DEFCORENAME, CTL_EOL); 356 sysctl_createv(clog, 0, NULL, NULL, 357 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 358 CTLTYPE_INT, "logsigexit", 359 SYSCTL_DESCR("Log process exit when caused by signals"), 360 NULL, 0, &kern_logsigexit, 0, 361 CTL_KERN, KERN_LOGSIGEXIT, CTL_EOL); 362 sysctl_createv(clog, 0, NULL, NULL, 363 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 364 CTLTYPE_INT, "fscale", 365 SYSCTL_DESCR("Kernel fixed-point scale factor"), 366 NULL, FSCALE, NULL, 0, 367 CTL_KERN, KERN_FSCALE, CTL_EOL); 368 sysctl_createv(clog, 0, NULL, NULL, 369 CTLFLAG_PERMANENT, 370 CTLTYPE_INT, "ccpu", 371 SYSCTL_DESCR("Scheduler exponential decay value"), 372 NULL, 0, &ccpu, 0, 373 CTL_KERN, KERN_CCPU, CTL_EOL); 374 sysctl_createv(clog, 0, NULL, NULL, 375 CTLFLAG_PERMANENT, 376 CTLTYPE_STRUCT, "cp_time", 377 SYSCTL_DESCR("Clock ticks spent in different CPU states"), 378 sysctl_kern_cptime, 0, NULL, 0, 379 CTL_KERN, KERN_CP_TIME, CTL_EOL); 380 sysctl_createv(clog, 0, NULL, NULL, 381 CTLFLAG_PERMANENT, 382 CTLTYPE_STRUCT, "consdev", 383 SYSCTL_DESCR("Console device"), 384 sysctl_consdev, 0, NULL, sizeof(dev_t), 385 CTL_KERN, KERN_CONSDEV, CTL_EOL); 386 #if NPTY > 0 387 sysctl_createv(clog, 0, NULL, NULL, 388 CTLFLAG_PERMANENT, 389 CTLTYPE_INT, "maxptys", 390 SYSCTL_DESCR("Maximum number of pseudo-ttys"), 391 sysctl_kern_maxptys, 0, NULL, 0, 392 CTL_KERN, KERN_MAXPTYS, CTL_EOL); 393 #endif /* NPTY > 0 */ 394 sysctl_createv(clog, 0, NULL, NULL, 395 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 396 CTLTYPE_INT, "maxphys", 397 SYSCTL_DESCR("Maximum raw I/O transfer size"), 398 NULL, MAXPHYS, NULL, 0, 399 CTL_KERN, KERN_MAXPHYS, CTL_EOL); 400 sysctl_createv(clog, 0, NULL, NULL, 401 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 402 CTLTYPE_INT, "monotonic_clock", 403 SYSCTL_DESCR("Implementation version of the POSIX " 404 "1003.1b Monotonic Clock Option"), 405 /* XXX _POSIX_VERSION */ 406 NULL, _POSIX_MONOTONIC_CLOCK, NULL, 0, 407 CTL_KERN, KERN_MONOTONIC_CLOCK, CTL_EOL); 408 sysctl_createv(clog, 0, NULL, NULL, 409 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 410 CTLTYPE_INT, "labelsector", 411 SYSCTL_DESCR("Sector number containing the disklabel"), 412 NULL, LABELSECTOR, NULL, 0, 413 CTL_KERN, KERN_LABELSECTOR, CTL_EOL); 414 sysctl_createv(clog, 0, NULL, NULL, 415 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 416 CTLTYPE_INT, "labeloffset", 417 SYSCTL_DESCR("Offset of the disklabel within the " 418 "sector"), 419 NULL, LABELOFFSET, NULL, 0, 420 CTL_KERN, KERN_LABELOFFSET, CTL_EOL); 421 sysctl_createv(clog, 0, NULL, NULL, 422 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 423 CTLTYPE_INT, "labelusesmbr", 424 SYSCTL_DESCR("disklabel is inside MBR partition"), 425 NULL, LABELUSESMBR, NULL, 0, 426 CTL_KERN, CTL_CREATE, CTL_EOL); 427 sysctl_createv(clog, 0, NULL, NULL, 428 CTLFLAG_PERMANENT, 429 CTLTYPE_NODE, "lwp", 430 SYSCTL_DESCR("System-wide LWP information"), 431 sysctl_kern_lwp, 0, NULL, 0, 432 CTL_KERN, KERN_LWP, CTL_EOL); 433 sysctl_createv(clog, 0, NULL, NULL, 434 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 435 CTLTYPE_INT, "forkfsleep", 436 SYSCTL_DESCR("Milliseconds to sleep on fork failure due " 437 "to process limits"), 438 sysctl_kern_forkfsleep, 0, NULL, 0, 439 CTL_KERN, KERN_FORKFSLEEP, CTL_EOL); 440 sysctl_createv(clog, 0, NULL, NULL, 441 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 442 CTLTYPE_INT, "posix_threads", 443 SYSCTL_DESCR("Version of IEEE Std 1003.1 and its " 444 "Threads option to which the system " 445 "attempts to conform"), 446 /* XXX _POSIX_VERSION */ 447 NULL, _POSIX_THREADS, NULL, 0, 448 CTL_KERN, KERN_POSIX_THREADS, CTL_EOL); 449 sysctl_createv(clog, 0, NULL, NULL, 450 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 451 CTLTYPE_INT, "posix_semaphores", 452 SYSCTL_DESCR("Version of IEEE Std 1003.1 and its " 453 "Semaphores option to which the system " 454 "attempts to conform"), NULL, 455 200112, NULL, 0, 456 CTL_KERN, KERN_POSIX_SEMAPHORES, CTL_EOL); 457 sysctl_createv(clog, 0, NULL, NULL, 458 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 459 CTLTYPE_INT, "posix_barriers", 460 SYSCTL_DESCR("Version of IEEE Std 1003.1 and its " 461 "Barriers option to which the system " 462 "attempts to conform"), 463 /* XXX _POSIX_VERSION */ 464 NULL, _POSIX_BARRIERS, NULL, 0, 465 CTL_KERN, KERN_POSIX_BARRIERS, CTL_EOL); 466 sysctl_createv(clog, 0, NULL, NULL, 467 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 468 CTLTYPE_INT, "posix_timers", 469 SYSCTL_DESCR("Version of IEEE Std 1003.1 and its " 470 "Timers option to which the system " 471 "attempts to conform"), 472 /* XXX _POSIX_VERSION */ 473 NULL, _POSIX_TIMERS, NULL, 0, 474 CTL_KERN, KERN_POSIX_TIMERS, CTL_EOL); 475 sysctl_createv(clog, 0, NULL, NULL, 476 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 477 CTLTYPE_INT, "posix_spin_locks", 478 SYSCTL_DESCR("Version of IEEE Std 1003.1 and its Spin " 479 "Locks option to which the system attempts " 480 "to conform"), 481 /* XXX _POSIX_VERSION */ 482 NULL, _POSIX_SPIN_LOCKS, NULL, 0, 483 CTL_KERN, KERN_POSIX_SPIN_LOCKS, CTL_EOL); 484 sysctl_createv(clog, 0, NULL, NULL, 485 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 486 CTLTYPE_INT, "posix_reader_writer_locks", 487 SYSCTL_DESCR("Version of IEEE Std 1003.1 and its " 488 "Read-Write Locks option to which the " 489 "system attempts to conform"), 490 /* XXX _POSIX_VERSION */ 491 NULL, _POSIX_READER_WRITER_LOCKS, NULL, 0, 492 CTL_KERN, KERN_POSIX_READER_WRITER_LOCKS, CTL_EOL); 493 sysctl_createv(clog, 0, NULL, NULL, 494 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 495 CTLTYPE_INT, "dump_on_panic", 496 SYSCTL_DESCR("Perform a crash dump on system panic"), 497 NULL, 0, &dumponpanic, 0, 498 CTL_KERN, KERN_DUMP_ON_PANIC, CTL_EOL); 499 sysctl_createv(clog, 0, NULL, NULL, 500 CTLFLAG_PERMANENT, 501 CTLTYPE_INT, "root_partition", 502 SYSCTL_DESCR("Root partition on the root device"), 503 sysctl_kern_root_partition, 0, NULL, 0, 504 CTL_KERN, KERN_ROOT_PARTITION, CTL_EOL); 505 sysctl_createv(clog, 0, NULL, NULL, 506 CTLFLAG_PERMANENT, 507 CTLTYPE_STRUCT, "drivers", 508 SYSCTL_DESCR("List of all drivers with block and " 509 "character device numbers"), 510 sysctl_kern_drivers, 0, NULL, 0, 511 CTL_KERN, KERN_DRIVERS, CTL_EOL); 512 sysctl_createv(clog, 0, NULL, NULL, 513 CTLFLAG_PERMANENT, 514 CTLTYPE_STRUCT, "cp_id", 515 SYSCTL_DESCR("Mapping of CPU number to CPU id"), 516 sysctl_kern_cpid, 0, NULL, 0, 517 CTL_KERN, KERN_CP_ID, CTL_EOL); 518 sysctl_createv(clog, 0, NULL, &rnode, 519 CTLFLAG_PERMANENT, 520 CTLTYPE_NODE, "coredump", 521 SYSCTL_DESCR("Coredump settings."), 522 NULL, 0, NULL, 0, 523 CTL_KERN, CTL_CREATE, CTL_EOL); 524 sysctl_createv(clog, 0, &rnode, &rnode, 525 CTLFLAG_PERMANENT, 526 CTLTYPE_NODE, "setid", 527 SYSCTL_DESCR("Set-id processes' coredump settings."), 528 NULL, 0, NULL, 0, 529 CTL_CREATE, CTL_EOL); 530 sysctl_createv(clog, 0, &rnode, NULL, 531 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 532 CTLTYPE_INT, "dump", 533 SYSCTL_DESCR("Allow set-id processes to dump core."), 534 sysctl_security_setidcore, 0, &security_setidcore_dump, 535 sizeof(security_setidcore_dump), 536 CTL_CREATE, CTL_EOL); 537 sysctl_createv(clog, 0, &rnode, NULL, 538 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 539 CTLTYPE_STRING, "path", 540 SYSCTL_DESCR("Path pattern for set-id coredumps."), 541 sysctl_security_setidcorename, 0, 542 security_setidcore_path, 543 sizeof(security_setidcore_path), 544 CTL_CREATE, CTL_EOL); 545 sysctl_createv(clog, 0, &rnode, NULL, 546 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 547 CTLTYPE_INT, "owner", 548 SYSCTL_DESCR("Owner id for set-id processes' cores."), 549 sysctl_security_setidcore, 0, &security_setidcore_owner, 550 0, 551 CTL_CREATE, CTL_EOL); 552 sysctl_createv(clog, 0, &rnode, NULL, 553 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 554 CTLTYPE_INT, "group", 555 SYSCTL_DESCR("Group id for set-id processes' cores."), 556 sysctl_security_setidcore, 0, &security_setidcore_group, 557 0, 558 CTL_CREATE, CTL_EOL); 559 sysctl_createv(clog, 0, &rnode, NULL, 560 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 561 CTLTYPE_INT, "mode", 562 SYSCTL_DESCR("Mode for set-id processes' cores."), 563 sysctl_security_setidcore, 0, &security_setidcore_mode, 564 0, 565 CTL_CREATE, CTL_EOL); 566 sysctl_createv(clog, 0, NULL, NULL, 567 CTLFLAG_IMMEDIATE|CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 568 CTLTYPE_INT, "no_sa_support", 569 SYSCTL_DESCR("0 if the kernel supports SA, otherwise " 570 "it doesn't"), 571 NULL, 1, NULL, 0, 572 CTL_KERN, CTL_CREATE, CTL_EOL); 573 sysctl_createv(clog, 0, NULL, NULL, 574 CTLFLAG_PERMANENT, 575 CTLTYPE_STRING, "configname", 576 SYSCTL_DESCR("Name of config file"), 577 NULL, 0, __UNCONST(kernel_ident), 0, 578 CTL_KERN, CTL_CREATE, CTL_EOL); 579 sysctl_createv(clog, 0, NULL, NULL, 580 CTLFLAG_PERMANENT, 581 CTLTYPE_STRING, "buildinfo", 582 SYSCTL_DESCR("Information from build environment"), 583 NULL, 0, __UNCONST(buildinfo), 0, 584 CTL_KERN, CTL_CREATE, CTL_EOL); 585 sysctl_createv(clog, 0, NULL, NULL, 586 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 587 CTLTYPE_INT, "messages", 588 SYSCTL_DESCR("Kernel message verbosity"), 589 sysctl_kern_messages, 0, NULL, 0, 590 CTL_KERN, CTL_CREATE, CTL_EOL); 591 } 592 593 SYSCTL_SETUP(sysctl_hw_misc_setup, "sysctl hw subtree misc setup") 594 { 595 596 sysctl_createv(clog, 0, NULL, NULL, 597 CTLFLAG_PERMANENT, 598 CTLTYPE_INT, "usermem", 599 SYSCTL_DESCR("Bytes of non-kernel memory"), 600 sysctl_hw_usermem, 0, NULL, 0, 601 CTL_HW, HW_USERMEM, CTL_EOL); 602 sysctl_createv(clog, 0, NULL, NULL, 603 CTLFLAG_PERMANENT|CTLFLAG_READWRITE|CTLFLAG_HEX, 604 CTLTYPE_STRING, "cnmagic", 605 SYSCTL_DESCR("Console magic key sequence"), 606 sysctl_hw_cnmagic, 0, NULL, CNS_LEN, 607 CTL_HW, HW_CNMAGIC, CTL_EOL); 608 sysctl_createv(clog, 0, NULL, NULL, 609 CTLFLAG_PERMANENT, 610 CTLTYPE_QUAD, "usermem64", 611 SYSCTL_DESCR("Bytes of non-kernel memory"), 612 sysctl_hw_usermem, 0, NULL, 0, 613 CTL_HW, HW_USERMEM64, CTL_EOL); 614 } 615 616 #ifdef DEBUG 617 /* 618 * Debugging related system variables. 619 */ 620 struct ctldebug /* debug0, */ /* debug1, */ debug2, debug3, debug4; 621 struct ctldebug debug5, debug6, debug7, debug8, debug9; 622 struct ctldebug debug10, debug11, debug12, debug13, debug14; 623 struct ctldebug debug15, debug16, debug17, debug18, debug19; 624 static struct ctldebug *debugvars[] = { 625 &debug0, &debug1, &debug2, &debug3, &debug4, 626 &debug5, &debug6, &debug7, &debug8, &debug9, 627 &debug10, &debug11, &debug12, &debug13, &debug14, 628 &debug15, &debug16, &debug17, &debug18, &debug19, 629 }; 630 631 /* 632 * this setup routine is a replacement for debug_sysctl() 633 * 634 * note that it creates several nodes per defined debug variable 635 */ 636 SYSCTL_SETUP(sysctl_debug_setup, "sysctl debug subtree setup") 637 { 638 struct ctldebug *cdp; 639 char nodename[20]; 640 int i; 641 642 /* 643 * two ways here: 644 * 645 * the "old" way (debug.name -> value) which was emulated by 646 * the sysctl(8) binary 647 * 648 * the new way, which the sysctl(8) binary was actually using 649 650 node debug 651 node debug.0 652 string debug.0.name 653 int debug.0.value 654 int debug.name 655 656 */ 657 658 for (i = 0; i < __arraycount(debugvars); i++) { 659 cdp = debugvars[i]; 660 if (cdp->debugname == NULL || cdp->debugvar == NULL) 661 continue; 662 663 snprintf(nodename, sizeof(nodename), "debug%d", i); 664 sysctl_createv(clog, 0, NULL, NULL, 665 CTLFLAG_PERMANENT|CTLFLAG_HIDDEN, 666 CTLTYPE_NODE, nodename, NULL, 667 NULL, 0, NULL, 0, 668 CTL_DEBUG, i, CTL_EOL); 669 sysctl_createv(clog, 0, NULL, NULL, 670 CTLFLAG_PERMANENT|CTLFLAG_HIDDEN, 671 CTLTYPE_STRING, "name", NULL, 672 /*XXXUNCONST*/ 673 NULL, 0, __UNCONST(cdp->debugname), 0, 674 CTL_DEBUG, i, CTL_DEBUG_NAME, CTL_EOL); 675 sysctl_createv(clog, 0, NULL, NULL, 676 CTLFLAG_PERMANENT|CTLFLAG_HIDDEN, 677 CTLTYPE_INT, "value", NULL, 678 NULL, 0, cdp->debugvar, 0, 679 CTL_DEBUG, i, CTL_DEBUG_VALUE, CTL_EOL); 680 sysctl_createv(clog, 0, NULL, NULL, 681 CTLFLAG_PERMANENT, 682 CTLTYPE_INT, cdp->debugname, NULL, 683 NULL, 0, cdp->debugvar, 0, 684 CTL_DEBUG, CTL_CREATE, CTL_EOL); 685 } 686 } 687 #endif /* DEBUG */ 688 689 /* 690 * ******************************************************************** 691 * section 2: private node-specific helper routines. 692 * ******************************************************************** 693 */ 694 695 /* 696 * sysctl helper routine for kern.maxvnodes. Drain vnodes if 697 * new value is lower than desiredvnodes and then calls reinit 698 * routines that needs to adjust to the new value. 699 */ 700 static int 701 sysctl_kern_maxvnodes(SYSCTLFN_ARGS) 702 { 703 int error, new_vnodes, old_vnodes, new_max; 704 struct sysctlnode node; 705 706 new_vnodes = desiredvnodes; 707 node = *rnode; 708 node.sysctl_data = &new_vnodes; 709 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 710 if (error || newp == NULL) 711 return (error); 712 713 /* 714 * sysctl passes down unsigned values, require them 715 * to be positive 716 */ 717 if (new_vnodes <= 0) 718 return (EINVAL); 719 720 /* Limits: 75% of kmem and physical memory. */ 721 new_max = calc_cache_size(vmem_size(kmem_arena, VMEM_FREE|VMEM_ALLOC), 722 75, 75) / VNODE_COST; 723 if (new_vnodes > new_max) 724 new_vnodes = new_max; 725 726 old_vnodes = desiredvnodes; 727 desiredvnodes = new_vnodes; 728 error = vfs_drainvnodes(); 729 if (error) { 730 desiredvnodes = old_vnodes; 731 return (error); 732 } 733 vfs_reinit(); 734 nchreinit(); 735 736 return (0); 737 } 738 739 /* 740 * sysctl helper routine for kern.messages. 741 * Alters boothowto to display kernel messages in increasing verbosity 742 * from 0 to 4. 743 */ 744 745 #define MAXMESSAGES 4 746 static int 747 sysctl_kern_messages(SYSCTLFN_ARGS) 748 { 749 int error, messageverbose, messagemask, newboothowto; 750 struct sysctlnode node; 751 752 messagemask = (AB_NORMAL|AB_QUIET|AB_SILENT|AB_VERBOSE|AB_DEBUG); 753 switch (boothowto & messagemask) { 754 case AB_SILENT: 755 messageverbose = 0; 756 break; 757 case AB_QUIET: 758 messageverbose = 1; 759 break; 760 case AB_VERBOSE: 761 messageverbose = 3; 762 break; 763 case AB_DEBUG: 764 messageverbose = 4; 765 break; 766 case AB_NORMAL: 767 default: 768 messageverbose = 2; 769 } 770 771 node = *rnode; 772 node.sysctl_data = &messageverbose; 773 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 774 if (error || newp == NULL) 775 return (error); 776 if (messageverbose < 0 || messageverbose > MAXMESSAGES) 777 return EINVAL; 778 779 /* Set boothowto */ 780 newboothowto = boothowto & ~messagemask; 781 782 switch (messageverbose) { 783 case 0: 784 newboothowto |= AB_SILENT; 785 break; 786 case 1: 787 newboothowto |= AB_QUIET; 788 break; 789 case 3: 790 newboothowto |= AB_VERBOSE; 791 break; 792 case 4: 793 newboothowto |= AB_DEBUG; 794 break; 795 case 2: 796 default: /* Messages default to normal. */ 797 break; 798 } 799 800 boothowto = newboothowto; 801 802 return (0); 803 } 804 805 /* 806 * sysctl helper routine for rtc_offset - set time after changes 807 */ 808 static int 809 sysctl_kern_rtc_offset(SYSCTLFN_ARGS) 810 { 811 struct timespec ts, delta; 812 int error, new_rtc_offset; 813 struct sysctlnode node; 814 815 new_rtc_offset = rtc_offset; 816 node = *rnode; 817 node.sysctl_data = &new_rtc_offset; 818 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 819 if (error || newp == NULL) 820 return (error); 821 822 if (kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_TIME, 823 KAUTH_REQ_SYSTEM_TIME_RTCOFFSET, 824 KAUTH_ARG(new_rtc_offset), NULL, NULL)) 825 return (EPERM); 826 if (rtc_offset == new_rtc_offset) 827 return (0); 828 829 /* if we change the offset, adjust the time */ 830 nanotime(&ts); 831 delta.tv_sec = 60 * (new_rtc_offset - rtc_offset); 832 delta.tv_nsec = 0; 833 timespecadd(&ts, &delta, &ts); 834 rtc_offset = new_rtc_offset; 835 return (settime(l->l_proc, &ts)); 836 } 837 838 /* 839 * sysctl helper routine for kern.maxproc. Ensures that the new 840 * values are not too low or too high. 841 */ 842 static int 843 sysctl_kern_maxproc(SYSCTLFN_ARGS) 844 { 845 int error, nmaxproc; 846 struct sysctlnode node; 847 848 nmaxproc = maxproc; 849 node = *rnode; 850 node.sysctl_data = &nmaxproc; 851 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 852 if (error || newp == NULL) 853 return (error); 854 855 if (nmaxproc < 0 || nmaxproc >= PID_MAX) 856 return (EINVAL); 857 #ifdef __HAVE_CPU_MAXPROC 858 if (nmaxproc > cpu_maxproc()) 859 return (EINVAL); 860 #endif 861 maxproc = nmaxproc; 862 863 return (0); 864 } 865 866 /* 867 * sysctl helper function for kern.hostid. The hostid is a long, but 868 * we export it as an int, so we need to give it a little help. 869 */ 870 static int 871 sysctl_kern_hostid(SYSCTLFN_ARGS) 872 { 873 int error, inthostid; 874 struct sysctlnode node; 875 876 inthostid = hostid; /* XXX assumes sizeof int <= sizeof long */ 877 node = *rnode; 878 node.sysctl_data = &inthostid; 879 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 880 if (error || newp == NULL) 881 return (error); 882 883 hostid = (unsigned)inthostid; 884 885 return (0); 886 } 887 888 /* 889 * sysctl helper routine for kern.defcorename. In the case of a new 890 * string being assigned, check that it's not a zero-length string. 891 * (XXX the check in -current doesn't work, but do we really care?) 892 */ 893 static int 894 sysctl_kern_defcorename(SYSCTLFN_ARGS) 895 { 896 int error; 897 char *newcorename; 898 struct sysctlnode node; 899 900 newcorename = PNBUF_GET(); 901 node = *rnode; 902 node.sysctl_data = &newcorename[0]; 903 memcpy(node.sysctl_data, rnode->sysctl_data, MAXPATHLEN); 904 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 905 if (error || newp == NULL) { 906 goto done; 907 } 908 909 /* 910 * when sysctl_lookup() deals with a string, it's guaranteed 911 * to come back nul terminated. So there. :) 912 */ 913 if (strlen(newcorename) == 0) { 914 error = EINVAL; 915 } else { 916 memcpy(rnode->sysctl_data, node.sysctl_data, MAXPATHLEN); 917 error = 0; 918 } 919 done: 920 PNBUF_PUT(newcorename); 921 return error; 922 } 923 924 /* 925 * sysctl helper routine for kern.cp_time node. Adds up cpu time 926 * across all cpus. 927 */ 928 static int 929 sysctl_kern_cptime(SYSCTLFN_ARGS) 930 { 931 struct sysctlnode node = *rnode; 932 uint64_t *cp_time = NULL; 933 int error, n = ncpu, i; 934 struct cpu_info *ci; 935 CPU_INFO_ITERATOR cii; 936 937 /* 938 * if you specifically pass a buffer that is the size of the 939 * sum, or if you are probing for the size, you get the "sum" 940 * of cp_time (and the size thereof) across all processors. 941 * 942 * alternately, you can pass an additional mib number and get 943 * cp_time for that particular processor. 944 */ 945 switch (namelen) { 946 case 0: 947 if (*oldlenp == sizeof(uint64_t) * CPUSTATES || oldp == NULL) { 948 node.sysctl_size = sizeof(uint64_t) * CPUSTATES; 949 n = -1; /* SUM */ 950 } 951 else { 952 node.sysctl_size = n * sizeof(uint64_t) * CPUSTATES; 953 n = -2; /* ALL */ 954 } 955 break; 956 case 1: 957 if (name[0] < 0 || name[0] >= n) 958 return (ENOENT); /* ENOSUCHPROCESSOR */ 959 node.sysctl_size = sizeof(uint64_t) * CPUSTATES; 960 n = name[0]; 961 /* 962 * adjust these so that sysctl_lookup() will be happy 963 */ 964 name++; 965 namelen--; 966 break; 967 default: 968 return (EINVAL); 969 } 970 971 cp_time = kmem_alloc(node.sysctl_size, KM_SLEEP); 972 node.sysctl_data = cp_time; 973 memset(cp_time, 0, node.sysctl_size); 974 975 for (CPU_INFO_FOREACH(cii, ci)) { 976 if (n <= 0) { 977 for (i = 0; i < CPUSTATES; i++) { 978 cp_time[i] += ci->ci_schedstate.spc_cp_time[i]; 979 } 980 } 981 /* 982 * if a specific processor was requested and we just 983 * did it, we're done here 984 */ 985 if (n == 0) 986 break; 987 /* 988 * if doing "all", skip to next cp_time set for next processor 989 */ 990 if (n == -2) 991 cp_time += CPUSTATES; 992 /* 993 * if we're doing a specific processor, we're one 994 * processor closer 995 */ 996 if (n > 0) 997 n--; 998 } 999 1000 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1001 kmem_free(node.sysctl_data, node.sysctl_size); 1002 return (error); 1003 } 1004 1005 #if NPTY > 0 1006 /* 1007 * sysctl helper routine for kern.maxptys. Ensures that any new value 1008 * is acceptable to the pty subsystem. 1009 */ 1010 static int 1011 sysctl_kern_maxptys(SYSCTLFN_ARGS) 1012 { 1013 int pty_maxptys(int, int); /* defined in kern/tty_pty.c */ 1014 int error, xmax; 1015 struct sysctlnode node; 1016 1017 /* get current value of maxptys */ 1018 xmax = pty_maxptys(0, 0); 1019 1020 node = *rnode; 1021 node.sysctl_data = &xmax; 1022 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1023 if (error || newp == NULL) 1024 return (error); 1025 1026 if (xmax != pty_maxptys(xmax, 1)) 1027 return (EINVAL); 1028 1029 return (0); 1030 } 1031 #endif /* NPTY > 0 */ 1032 1033 /* 1034 * sysctl helper routine to do kern.lwp.* work. 1035 */ 1036 static int 1037 sysctl_kern_lwp(SYSCTLFN_ARGS) 1038 { 1039 struct kinfo_lwp klwp; 1040 struct proc *p; 1041 struct lwp *l2, *l3; 1042 char *where, *dp; 1043 int pid, elem_size, elem_count; 1044 int buflen, needed, error; 1045 bool gotit; 1046 1047 if (namelen == 1 && name[0] == CTL_QUERY) 1048 return (sysctl_query(SYSCTLFN_CALL(rnode))); 1049 1050 dp = where = oldp; 1051 buflen = where != NULL ? *oldlenp : 0; 1052 error = needed = 0; 1053 1054 if (newp != NULL || namelen != 3) 1055 return (EINVAL); 1056 pid = name[0]; 1057 elem_size = name[1]; 1058 elem_count = name[2]; 1059 1060 sysctl_unlock(); 1061 if (pid == -1) { 1062 mutex_enter(proc_lock); 1063 PROCLIST_FOREACH(p, &allproc) { 1064 /* Grab a hold on the process. */ 1065 if (!rw_tryenter(&p->p_reflock, RW_READER)) { 1066 continue; 1067 } 1068 mutex_exit(proc_lock); 1069 1070 mutex_enter(p->p_lock); 1071 LIST_FOREACH(l2, &p->p_lwps, l_sibling) { 1072 if (buflen >= elem_size && elem_count > 0) { 1073 lwp_lock(l2); 1074 fill_lwp(l2, &klwp); 1075 lwp_unlock(l2); 1076 mutex_exit(p->p_lock); 1077 1078 /* 1079 * Copy out elem_size, but not 1080 * larger than the size of a 1081 * struct kinfo_proc2. 1082 */ 1083 error = dcopyout(l, &klwp, dp, 1084 uimin(sizeof(klwp), elem_size)); 1085 if (error) { 1086 rw_exit(&p->p_reflock); 1087 goto cleanup; 1088 } 1089 mutex_enter(p->p_lock); 1090 LIST_FOREACH(l3, &p->p_lwps, 1091 l_sibling) { 1092 if (l2 == l3) 1093 break; 1094 } 1095 if (l3 == NULL) { 1096 mutex_exit(p->p_lock); 1097 rw_exit(&p->p_reflock); 1098 error = EAGAIN; 1099 goto cleanup; 1100 } 1101 dp += elem_size; 1102 buflen -= elem_size; 1103 elem_count--; 1104 } 1105 needed += elem_size; 1106 } 1107 mutex_exit(p->p_lock); 1108 1109 /* Drop reference to process. */ 1110 mutex_enter(proc_lock); 1111 rw_exit(&p->p_reflock); 1112 } 1113 mutex_exit(proc_lock); 1114 } else { 1115 mutex_enter(proc_lock); 1116 p = proc_find(pid); 1117 if (p == NULL) { 1118 error = ESRCH; 1119 mutex_exit(proc_lock); 1120 goto cleanup; 1121 } 1122 /* Grab a hold on the process. */ 1123 gotit = rw_tryenter(&p->p_reflock, RW_READER); 1124 mutex_exit(proc_lock); 1125 if (!gotit) { 1126 error = ESRCH; 1127 goto cleanup; 1128 } 1129 1130 mutex_enter(p->p_lock); 1131 LIST_FOREACH(l2, &p->p_lwps, l_sibling) { 1132 if (buflen >= elem_size && elem_count > 0) { 1133 lwp_lock(l2); 1134 fill_lwp(l2, &klwp); 1135 lwp_unlock(l2); 1136 mutex_exit(p->p_lock); 1137 /* 1138 * Copy out elem_size, but not larger than 1139 * the size of a struct kinfo_proc2. 1140 */ 1141 error = dcopyout(l, &klwp, dp, 1142 uimin(sizeof(klwp), elem_size)); 1143 if (error) { 1144 rw_exit(&p->p_reflock); 1145 goto cleanup; 1146 } 1147 mutex_enter(p->p_lock); 1148 LIST_FOREACH(l3, &p->p_lwps, l_sibling) { 1149 if (l2 == l3) 1150 break; 1151 } 1152 if (l3 == NULL) { 1153 mutex_exit(p->p_lock); 1154 rw_exit(&p->p_reflock); 1155 error = EAGAIN; 1156 goto cleanup; 1157 } 1158 dp += elem_size; 1159 buflen -= elem_size; 1160 elem_count--; 1161 } 1162 needed += elem_size; 1163 } 1164 mutex_exit(p->p_lock); 1165 1166 /* Drop reference to process. */ 1167 rw_exit(&p->p_reflock); 1168 } 1169 1170 if (where != NULL) { 1171 *oldlenp = dp - where; 1172 if (needed > *oldlenp) { 1173 sysctl_relock(); 1174 return (ENOMEM); 1175 } 1176 } else { 1177 needed += KERN_LWPSLOP; 1178 *oldlenp = needed; 1179 } 1180 error = 0; 1181 cleanup: 1182 sysctl_relock(); 1183 return (error); 1184 } 1185 1186 /* 1187 * sysctl helper routine for kern.forkfsleep node. Ensures that the 1188 * given value is not too large or two small, and is at least one 1189 * timer tick if not zero. 1190 */ 1191 static int 1192 sysctl_kern_forkfsleep(SYSCTLFN_ARGS) 1193 { 1194 /* userland sees value in ms, internally is in ticks */ 1195 extern int forkfsleep; /* defined in kern/kern_fork.c */ 1196 int error, timo, lsleep; 1197 struct sysctlnode node; 1198 1199 lsleep = forkfsleep * 1000 / hz; 1200 node = *rnode; 1201 node.sysctl_data = &lsleep; 1202 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1203 if (error || newp == NULL) 1204 return (error); 1205 1206 /* refuse negative values, and overly 'long time' */ 1207 if (lsleep < 0 || lsleep > MAXSLP * 1000) 1208 return (EINVAL); 1209 1210 timo = mstohz(lsleep); 1211 1212 /* if the interval is >0 ms && <1 tick, use 1 tick */ 1213 if (lsleep != 0 && timo == 0) 1214 forkfsleep = 1; 1215 else 1216 forkfsleep = timo; 1217 1218 return (0); 1219 } 1220 1221 /* 1222 * sysctl helper routine for kern.root_partition 1223 */ 1224 static int 1225 sysctl_kern_root_partition(SYSCTLFN_ARGS) 1226 { 1227 int rootpart = DISKPART(rootdev); 1228 struct sysctlnode node = *rnode; 1229 1230 node.sysctl_data = &rootpart; 1231 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 1232 } 1233 1234 /* 1235 * sysctl helper function for kern.drivers 1236 */ 1237 static int 1238 sysctl_kern_drivers(SYSCTLFN_ARGS) 1239 { 1240 int error; 1241 size_t buflen; 1242 struct kinfo_drivers kd; 1243 char *start, *where; 1244 const char *dname; 1245 int i; 1246 extern struct devsw_conv *devsw_conv; 1247 extern int max_devsw_convs; 1248 1249 start = where = oldp; 1250 buflen = *oldlenp; 1251 if (where == NULL) { 1252 *oldlenp = max_devsw_convs * sizeof kd; 1253 return 0; 1254 } 1255 1256 /* 1257 * An array of kinfo_drivers structures 1258 */ 1259 error = 0; 1260 sysctl_unlock(); 1261 mutex_enter(&device_lock); 1262 for (i = 0; i < max_devsw_convs; i++) { 1263 dname = devsw_conv[i].d_name; 1264 if (dname == NULL) 1265 continue; 1266 if (buflen < sizeof kd) { 1267 error = ENOMEM; 1268 break; 1269 } 1270 memset(&kd, 0, sizeof(kd)); 1271 kd.d_bmajor = devsw_conv[i].d_bmajor; 1272 kd.d_cmajor = devsw_conv[i].d_cmajor; 1273 strlcpy(kd.d_name, dname, sizeof kd.d_name); 1274 mutex_exit(&device_lock); 1275 error = dcopyout(l, &kd, where, sizeof kd); 1276 mutex_enter(&device_lock); 1277 if (error != 0) 1278 break; 1279 buflen -= sizeof kd; 1280 where += sizeof kd; 1281 } 1282 mutex_exit(&device_lock); 1283 sysctl_relock(); 1284 *oldlenp = where - start; 1285 return error; 1286 } 1287 1288 static int 1289 sysctl_security_setidcore(SYSCTLFN_ARGS) 1290 { 1291 int newsize, error; 1292 struct sysctlnode node; 1293 1294 node = *rnode; 1295 node.sysctl_data = &newsize; 1296 newsize = *(int *)rnode->sysctl_data; 1297 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1298 if (error || newp == NULL) 1299 return error; 1300 1301 if (kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_SETIDCORE, 1302 0, NULL, NULL, NULL)) 1303 return (EPERM); 1304 1305 *(int *)rnode->sysctl_data = newsize; 1306 1307 return 0; 1308 } 1309 1310 static int 1311 sysctl_security_setidcorename(SYSCTLFN_ARGS) 1312 { 1313 int error; 1314 char *newsetidcorename; 1315 struct sysctlnode node; 1316 1317 newsetidcorename = PNBUF_GET(); 1318 node = *rnode; 1319 node.sysctl_data = newsetidcorename; 1320 memcpy(node.sysctl_data, rnode->sysctl_data, MAXPATHLEN); 1321 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1322 if (error || newp == NULL) { 1323 goto out; 1324 } 1325 if (kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_SETIDCORE, 1326 0, NULL, NULL, NULL)) { 1327 error = EPERM; 1328 goto out; 1329 } 1330 if (strlen(newsetidcorename) == 0) { 1331 error = EINVAL; 1332 goto out; 1333 } 1334 memcpy(rnode->sysctl_data, node.sysctl_data, MAXPATHLEN); 1335 out: 1336 PNBUF_PUT(newsetidcorename); 1337 return error; 1338 } 1339 1340 /* 1341 * sysctl helper routine for kern.cp_id node. Maps cpus to their 1342 * cpuids. 1343 */ 1344 static int 1345 sysctl_kern_cpid(SYSCTLFN_ARGS) 1346 { 1347 struct sysctlnode node = *rnode; 1348 uint64_t *cp_id = NULL; 1349 int error, n = ncpu; 1350 struct cpu_info *ci; 1351 CPU_INFO_ITERATOR cii; 1352 1353 /* 1354 * Here you may either retrieve a single cpu id or the whole 1355 * set. The size you get back when probing depends on what 1356 * you ask for. 1357 */ 1358 switch (namelen) { 1359 case 0: 1360 node.sysctl_size = n * sizeof(uint64_t); 1361 n = -2; /* ALL */ 1362 break; 1363 case 1: 1364 if (name[0] < 0 || name[0] >= n) 1365 return (ENOENT); /* ENOSUCHPROCESSOR */ 1366 node.sysctl_size = sizeof(uint64_t); 1367 n = name[0]; 1368 /* 1369 * adjust these so that sysctl_lookup() will be happy 1370 */ 1371 name++; 1372 namelen--; 1373 break; 1374 default: 1375 return (EINVAL); 1376 } 1377 1378 cp_id = kmem_alloc(node.sysctl_size, KM_SLEEP); 1379 node.sysctl_data = cp_id; 1380 memset(cp_id, 0, node.sysctl_size); 1381 1382 for (CPU_INFO_FOREACH(cii, ci)) { 1383 if (n <= 0) 1384 cp_id[0] = cpu_index(ci); 1385 /* 1386 * if a specific processor was requested and we just 1387 * did it, we're done here 1388 */ 1389 if (n == 0) 1390 break; 1391 /* 1392 * if doing "all", skip to next cp_id slot for next processor 1393 */ 1394 if (n == -2) 1395 cp_id++; 1396 /* 1397 * if we're doing a specific processor, we're one 1398 * processor closer 1399 */ 1400 if (n > 0) 1401 n--; 1402 } 1403 1404 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1405 kmem_free(node.sysctl_data, node.sysctl_size); 1406 return (error); 1407 } 1408 1409 /* 1410 * sysctl helper routine for hw.usermem and hw.usermem64. Values are 1411 * calculate on the fly taking into account integer overflow and the 1412 * current wired count. 1413 */ 1414 static int 1415 sysctl_hw_usermem(SYSCTLFN_ARGS) 1416 { 1417 u_int ui; 1418 u_quad_t uq; 1419 struct sysctlnode node; 1420 1421 node = *rnode; 1422 switch (rnode->sysctl_num) { 1423 case HW_USERMEM: 1424 if ((ui = physmem - uvmexp.wired) > (UINT_MAX / PAGE_SIZE)) 1425 ui = UINT_MAX; 1426 else 1427 ui *= PAGE_SIZE; 1428 node.sysctl_data = &ui; 1429 break; 1430 case HW_USERMEM64: 1431 uq = (u_quad_t)(physmem - uvmexp.wired) * PAGE_SIZE; 1432 node.sysctl_data = &uq; 1433 break; 1434 default: 1435 return (EINVAL); 1436 } 1437 1438 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 1439 } 1440 1441 /* 1442 * sysctl helper routine for kern.cnmagic node. Pulls the old value 1443 * out, encoded, and stuffs the new value in for decoding. 1444 */ 1445 static int 1446 sysctl_hw_cnmagic(SYSCTLFN_ARGS) 1447 { 1448 char magic[CNS_LEN]; 1449 int error; 1450 struct sysctlnode node; 1451 1452 if (oldp) 1453 cn_get_magic(magic, CNS_LEN); 1454 node = *rnode; 1455 node.sysctl_data = &magic[0]; 1456 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1457 if (error || newp == NULL) 1458 return (error); 1459 1460 return (cn_set_magic(magic)); 1461 } 1462 1463 /* 1464 * ******************************************************************** 1465 * section 3: public helper routines that are used for more than one 1466 * node 1467 * ******************************************************************** 1468 */ 1469 1470 /* 1471 * sysctl helper routine for the kern.root_device node and some ports' 1472 * machdep.root_device nodes. 1473 */ 1474 int 1475 sysctl_root_device(SYSCTLFN_ARGS) 1476 { 1477 struct sysctlnode node; 1478 1479 node = *rnode; 1480 node.sysctl_data = __UNCONST(device_xname(root_device)); 1481 node.sysctl_size = strlen(device_xname(root_device)) + 1; 1482 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 1483 } 1484 1485 /* 1486 * sysctl helper routine for kern.consdev, dependent on the current 1487 * state of the console. Also used for machdep.console_device on some 1488 * ports. 1489 */ 1490 int 1491 sysctl_consdev(SYSCTLFN_ARGS) 1492 { 1493 dev_t consdev; 1494 uint32_t oconsdev; 1495 struct sysctlnode node; 1496 1497 if (cn_tab != NULL) 1498 consdev = cn_tab->cn_dev; 1499 else 1500 consdev = NODEV; 1501 node = *rnode; 1502 switch (*oldlenp) { 1503 case sizeof(consdev): 1504 node.sysctl_data = &consdev; 1505 node.sysctl_size = sizeof(consdev); 1506 break; 1507 case sizeof(oconsdev): 1508 oconsdev = (uint32_t)consdev; 1509 node.sysctl_data = &oconsdev; 1510 node.sysctl_size = sizeof(oconsdev); 1511 break; 1512 default: 1513 return EINVAL; 1514 } 1515 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 1516 } 1517 1518 /* 1519 * ******************************************************************** 1520 * section 4: support for some helpers 1521 * ******************************************************************** 1522 */ 1523 1524 1525 /* 1526 * Fill in a kinfo_lwp structure for the specified lwp. 1527 */ 1528 static void 1529 fill_lwp(struct lwp *l, struct kinfo_lwp *kl) 1530 { 1531 const bool allowaddr = get_expose_address(curproc); 1532 struct proc *p = l->l_proc; 1533 struct timeval tv; 1534 1535 KASSERT(lwp_locked(l, NULL)); 1536 1537 memset(kl, 0, sizeof(*kl)); 1538 1539 kl->l_forw = 0; 1540 kl->l_back = 0; 1541 COND_SET_VALUE(kl->l_laddr, PTRTOUINT64(l), allowaddr); 1542 COND_SET_VALUE(kl->l_addr, PTRTOUINT64(l->l_addr), allowaddr); 1543 kl->l_stat = l->l_stat; 1544 kl->l_lid = l->l_lid; 1545 kl->l_flag = L_INMEM; 1546 kl->l_flag |= sysctl_map_flags(sysctl_lwpprflagmap, l->l_prflag); 1547 kl->l_flag |= sysctl_map_flags(sysctl_lwpflagmap, l->l_flag); 1548 1549 kl->l_swtime = l->l_swtime; 1550 kl->l_slptime = l->l_slptime; 1551 if (l->l_stat == LSONPROC) 1552 kl->l_schedflags = l->l_cpu->ci_schedstate.spc_flags; 1553 else 1554 kl->l_schedflags = 0; 1555 kl->l_priority = lwp_eprio(l); 1556 kl->l_usrpri = l->l_priority; 1557 if (l->l_wchan) 1558 strncpy(kl->l_wmesg, l->l_wmesg, sizeof(kl->l_wmesg)); 1559 COND_SET_VALUE(kl->l_wchan, PTRTOUINT64(l->l_wchan), allowaddr); 1560 kl->l_cpuid = cpu_index(l->l_cpu); 1561 bintime2timeval(&l->l_rtime, &tv); 1562 kl->l_rtime_sec = tv.tv_sec; 1563 kl->l_rtime_usec = tv.tv_usec; 1564 kl->l_cpticks = l->l_cpticks; 1565 kl->l_pctcpu = l->l_pctcpu; 1566 kl->l_pid = p->p_pid; 1567 if (l->l_name == NULL) 1568 kl->l_name[0] = '\0'; 1569 else 1570 strlcpy(kl->l_name, l->l_name, sizeof(kl->l_name)); 1571 } 1572
Indexes created Wed Oct 01 15:09:59 GMT 2025