sysctl.h revision 228046
1/*- 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Mike Karels at Berkeley Software Design, Inc. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 4. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * @(#)sysctl.h 8.1 (Berkeley) 6/2/93 33 * $FreeBSD: head/sys/sys/sysctl.h 228046 2011-11-27 21:01:51Z trociny $ 34 */ 35 36#ifndef _SYS_SYSCTL_H_ 37#define _SYS_SYSCTL_H_ 38 39#include <sys/queue.h> 40 41struct thread; 42/* 43 * Definitions for sysctl call. The sysctl call uses a hierarchical name 44 * for objects that can be examined or modified. The name is expressed as 45 * a sequence of integers. Like a file path name, the meaning of each 46 * component depends on its place in the hierarchy. The top-level and kern 47 * identifiers are defined here, and other identifiers are defined in the 48 * respective subsystem header files. 49 */ 50 51#define CTL_MAXNAME 24 /* largest number of components supported */ 52 53/* 54 * Each subsystem defined by sysctl defines a list of variables 55 * for that subsystem. Each name is either a node with further 56 * levels defined below it, or it is a leaf of some particular 57 * type given below. Each sysctl level defines a set of name/type 58 * pairs to be used by sysctl(8) in manipulating the subsystem. 59 */ 60struct ctlname { 61 char *ctl_name; /* subsystem name */ 62 int ctl_type; /* type of name */ 63}; 64 65#define CTLTYPE 0xf /* Mask for the type */ 66#define CTLTYPE_NODE 1 /* name is a node */ 67#define CTLTYPE_INT 2 /* name describes an integer */ 68#define CTLTYPE_STRING 3 /* name describes a string */ 69#define CTLTYPE_S64 4 /* name describes a signed 64-bit number */ 70#define CTLTYPE_OPAQUE 5 /* name describes a structure */ 71#define CTLTYPE_STRUCT CTLTYPE_OPAQUE /* name describes a structure */ 72#define CTLTYPE_UINT 6 /* name describes an unsigned integer */ 73#define CTLTYPE_LONG 7 /* name describes a long */ 74#define CTLTYPE_ULONG 8 /* name describes an unsigned long */ 75#define CTLTYPE_U64 9 /* name describes an unsigned 64-bit number */ 76 77#define CTLFLAG_RD 0x80000000 /* Allow reads of variable */ 78#define CTLFLAG_WR 0x40000000 /* Allow writes to the variable */ 79#define CTLFLAG_RW (CTLFLAG_RD|CTLFLAG_WR) 80#define CTLFLAG_ANYBODY 0x10000000 /* All users can set this var */ 81#define CTLFLAG_SECURE 0x08000000 /* Permit set only if securelevel<=0 */ 82#define CTLFLAG_PRISON 0x04000000 /* Prisoned roots can fiddle */ 83#define CTLFLAG_DYN 0x02000000 /* Dynamic oid - can be freed */ 84#define CTLFLAG_SKIP 0x01000000 /* Skip this sysctl when listing */ 85#define CTLMASK_SECURE 0x00F00000 /* Secure level */ 86#define CTLFLAG_TUN 0x00080000 /* Tunable variable */ 87#define CTLFLAG_MPSAFE 0x00040000 /* Handler is MP safe */ 88#define CTLFLAG_VNET 0x00020000 /* Prisons with vnet can fiddle */ 89#define CTLFLAG_RDTUN (CTLFLAG_RD|CTLFLAG_TUN) 90#define CTLFLAG_DYING 0x00010000 /* oid is being removed */ 91#define CTLFLAG_CAPRD 0x00008000 /* Can be read in capability mode */ 92#define CTLFLAG_CAPWR 0x00004000 /* Can be written in capability mode */ 93#define CTLFLAG_CAPRW (CTLFLAG_CAPRD|CTLFLAG_CAPWR) 94 95/* 96 * Secure level. Note that CTLFLAG_SECURE == CTLFLAG_SECURE1. 97 * 98 * Secure when the securelevel is raised to at least N. 99 */ 100#define CTLSHIFT_SECURE 20 101#define CTLFLAG_SECURE1 (CTLFLAG_SECURE | (0 << CTLSHIFT_SECURE)) 102#define CTLFLAG_SECURE2 (CTLFLAG_SECURE | (1 << CTLSHIFT_SECURE)) 103#define CTLFLAG_SECURE3 (CTLFLAG_SECURE | (2 << CTLSHIFT_SECURE)) 104 105/* 106 * USE THIS instead of a hardwired number from the categories below 107 * to get dynamically assigned sysctl entries using the linker-set 108 * technology. This is the way nearly all new sysctl variables should 109 * be implemented. 110 * e.g. SYSCTL_INT(_parent, OID_AUTO, name, CTLFLAG_RW, &variable, 0, ""); 111 */ 112#define OID_AUTO (-1) 113 114/* 115 * The starting number for dynamically-assigned entries. WARNING! 116 * ALL static sysctl entries should have numbers LESS than this! 117 */ 118#define CTL_AUTO_START 0x100 119 120#ifdef _KERNEL 121#include <sys/linker_set.h> 122 123#define SYSCTL_HANDLER_ARGS struct sysctl_oid *oidp, void *arg1, \ 124 intptr_t arg2, struct sysctl_req *req 125 126/* definitions for sysctl_req 'lock' member */ 127#define REQ_UNWIRED 1 128#define REQ_WIRED 2 129 130/* definitions for sysctl_req 'flags' member */ 131#if defined(__amd64__) || defined(__ia64__) || defined(__powerpc64__) 132#define SCTL_MASK32 1 /* 32 bit emulation */ 133#endif 134 135/* 136 * This describes the access space for a sysctl request. This is needed 137 * so that we can use the interface from the kernel or from user-space. 138 */ 139struct sysctl_req { 140 struct thread *td; /* used for access checking */ 141 int lock; /* wiring state */ 142 void *oldptr; 143 size_t oldlen; 144 size_t oldidx; 145 int (*oldfunc)(struct sysctl_req *, const void *, size_t); 146 void *newptr; 147 size_t newlen; 148 size_t newidx; 149 int (*newfunc)(struct sysctl_req *, void *, size_t); 150 size_t validlen; 151 int flags; 152}; 153 154SLIST_HEAD(sysctl_oid_list, sysctl_oid); 155 156/* 157 * This describes one "oid" in the MIB tree. Potentially more nodes can 158 * be hidden behind it, expanded by the handler. 159 */ 160struct sysctl_oid { 161 struct sysctl_oid_list *oid_parent; 162 SLIST_ENTRY(sysctl_oid) oid_link; 163 int oid_number; 164 u_int oid_kind; 165 void *oid_arg1; 166 intptr_t oid_arg2; 167 const char *oid_name; 168 int (*oid_handler)(SYSCTL_HANDLER_ARGS); 169 const char *oid_fmt; 170 int oid_refcnt; 171 u_int oid_running; 172 const char *oid_descr; 173}; 174 175#define SYSCTL_IN(r, p, l) (r->newfunc)(r, p, l) 176#define SYSCTL_OUT(r, p, l) (r->oldfunc)(r, p, l) 177 178int sysctl_handle_int(SYSCTL_HANDLER_ARGS); 179int sysctl_msec_to_ticks(SYSCTL_HANDLER_ARGS); 180int sysctl_handle_long(SYSCTL_HANDLER_ARGS); 181int sysctl_handle_64(SYSCTL_HANDLER_ARGS); 182int sysctl_handle_string(SYSCTL_HANDLER_ARGS); 183int sysctl_handle_opaque(SYSCTL_HANDLER_ARGS); 184 185int sysctl_dpcpu_int(SYSCTL_HANDLER_ARGS); 186int sysctl_dpcpu_long(SYSCTL_HANDLER_ARGS); 187int sysctl_dpcpu_quad(SYSCTL_HANDLER_ARGS); 188 189/* 190 * These functions are used to add/remove an oid from the mib. 191 */ 192void sysctl_register_oid(struct sysctl_oid *oidp); 193void sysctl_unregister_oid(struct sysctl_oid *oidp); 194 195/* Declare a static oid to allow child oids to be added to it. */ 196#define SYSCTL_DECL(name) \ 197 extern struct sysctl_oid_list sysctl_##name##_children 198 199/* Hide these in macros */ 200#define SYSCTL_CHILDREN(oid_ptr) (struct sysctl_oid_list *) \ 201 (oid_ptr)->oid_arg1 202#define SYSCTL_CHILDREN_SET(oid_ptr, val) \ 203 (oid_ptr)->oid_arg1 = (val); 204#define SYSCTL_STATIC_CHILDREN(oid_name) \ 205 (&sysctl_##oid_name##_children) 206 207/* === Structs and macros related to context handling === */ 208 209/* All dynamically created sysctls can be tracked in a context list. */ 210struct sysctl_ctx_entry { 211 struct sysctl_oid *entry; 212 TAILQ_ENTRY(sysctl_ctx_entry) link; 213}; 214 215TAILQ_HEAD(sysctl_ctx_list, sysctl_ctx_entry); 216 217#define SYSCTL_NODE_CHILDREN(parent, name) \ 218 sysctl_##parent##_##name##_children 219 220/* 221 * These macros provide type safety for sysctls. SYSCTL_ALLOWED_TYPES() 222 * defines a transparent union of the allowed types. SYSCTL_ASSERT_TYPE() 223 * and SYSCTL_ADD_ASSERT_TYPE() use the transparent union to assert that 224 * the pointer matches the allowed types. 225 * 226 * The allow_0 member allows a literal 0 to be passed for ptr. 227 */ 228#define SYSCTL_ALLOWED_TYPES(type, decls) \ 229 union sysctl_##type { \ 230 long allow_0; \ 231 decls \ 232 } __attribute__((__transparent_union__)); \ 233 \ 234 static inline void * \ 235 __sysctl_assert_##type(union sysctl_##type ptr) \ 236 { \ 237 return (ptr.a); \ 238 } \ 239 struct __hack 240 241SYSCTL_ALLOWED_TYPES(INT, int *a; ); 242SYSCTL_ALLOWED_TYPES(UINT, unsigned int *a; ); 243SYSCTL_ALLOWED_TYPES(LONG, long *a; ); 244SYSCTL_ALLOWED_TYPES(ULONG, unsigned long *a; ); 245SYSCTL_ALLOWED_TYPES(INT64, int64_t *a; long long *b; ); 246SYSCTL_ALLOWED_TYPES(UINT64, uint64_t *a; unsigned long long *b; ); 247 248#ifdef notyet 249#define SYSCTL_ADD_ASSERT_TYPE(type, ptr) \ 250 __sysctl_assert_ ## type (ptr) 251#define SYSCTL_ASSERT_TYPE(type, ptr, parent, name) \ 252 _SYSCTL_ASSERT_TYPE(type, ptr, __LINE__, parent##_##name) 253#else 254#define SYSCTL_ADD_ASSERT_TYPE(type, ptr) ptr 255#define SYSCTL_ASSERT_TYPE(type, ptr, parent, name) 256#endif 257#define _SYSCTL_ASSERT_TYPE(t, p, l, id) \ 258 __SYSCTL_ASSERT_TYPE(t, p, l, id) 259#define __SYSCTL_ASSERT_TYPE(type, ptr, line, id) \ 260 static inline void \ 261 sysctl_assert_##line##_##id(void) \ 262 { \ 263 (void)__sysctl_assert_##type(ptr); \ 264 } \ 265 struct __hack 266 267#ifndef NO_SYSCTL_DESCR 268#define __DESCR(d) d 269#else 270#define __DESCR(d) "" 271#endif 272 273/* This constructs a "raw" MIB oid. */ 274#define SYSCTL_OID(parent, nbr, name, kind, a1, a2, handler, fmt, descr) \ 275 static struct sysctl_oid sysctl__##parent##_##name = { \ 276 &sysctl_##parent##_children, { NULL }, nbr, kind, \ 277 a1, a2, #name, handler, fmt, 0, 0, __DESCR(descr) }; \ 278 DATA_SET(sysctl_set, sysctl__##parent##_##name) 279 280#define SYSCTL_ADD_OID(ctx, parent, nbr, name, kind, a1, a2, handler, fmt, descr) \ 281 sysctl_add_oid(ctx, parent, nbr, name, kind, a1, a2, handler, fmt, __DESCR(descr)) 282 283/* This constructs a node from which other oids can hang. */ 284#define SYSCTL_NODE(parent, nbr, name, access, handler, descr) \ 285 struct sysctl_oid_list SYSCTL_NODE_CHILDREN(parent, name); \ 286 SYSCTL_OID(parent, nbr, name, CTLTYPE_NODE|(access), \ 287 (void*)&SYSCTL_NODE_CHILDREN(parent, name), 0, handler, "N", descr) 288 289#define SYSCTL_ADD_NODE(ctx, parent, nbr, name, access, handler, descr) \ 290 sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_NODE|(access), \ 291 NULL, 0, handler, "N", __DESCR(descr)) 292 293/* Oid for a string. len can be 0 to indicate '\0' termination. */ 294#define SYSCTL_STRING(parent, nbr, name, access, arg, len, descr) \ 295 SYSCTL_OID(parent, nbr, name, CTLTYPE_STRING|(access), \ 296 arg, len, sysctl_handle_string, "A", descr) 297 298#define SYSCTL_ADD_STRING(ctx, parent, nbr, name, access, arg, len, descr) \ 299 sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_STRING|(access), \ 300 arg, len, sysctl_handle_string, "A", __DESCR(descr)) 301 302/* Oid for an int. If ptr is NULL, val is returned. */ 303#define SYSCTL_INT(parent, nbr, name, access, ptr, val, descr) \ 304 SYSCTL_ASSERT_TYPE(INT, ptr, parent, name); \ 305 SYSCTL_OID(parent, nbr, name, \ 306 CTLTYPE_INT | CTLFLAG_MPSAFE | (access), \ 307 ptr, val, sysctl_handle_int, "I", descr) 308 309#define SYSCTL_ADD_INT(ctx, parent, nbr, name, access, ptr, val, descr) \ 310 sysctl_add_oid(ctx, parent, nbr, name, \ 311 CTLTYPE_INT | CTLFLAG_MPSAFE | (access), \ 312 SYSCTL_ADD_ASSERT_TYPE(INT, ptr), val, \ 313 sysctl_handle_int, "I", __DESCR(descr)) 314 315/* Oid for an unsigned int. If ptr is NULL, val is returned. */ 316#define SYSCTL_UINT(parent, nbr, name, access, ptr, val, descr) \ 317 SYSCTL_ASSERT_TYPE(UINT, ptr, parent, name); \ 318 SYSCTL_OID(parent, nbr, name, \ 319 CTLTYPE_UINT | CTLFLAG_MPSAFE | (access), \ 320 ptr, val, sysctl_handle_int, "IU", descr) 321 322#define SYSCTL_ADD_UINT(ctx, parent, nbr, name, access, ptr, val, descr) \ 323 sysctl_add_oid(ctx, parent, nbr, name, \ 324 CTLTYPE_UINT | CTLFLAG_MPSAFE | (access), \ 325 SYSCTL_ADD_ASSERT_TYPE(UINT, ptr), val, \ 326 sysctl_handle_int, "IU", __DESCR(descr)) 327 328/* Oid for a long. The pointer must be non NULL. */ 329#define SYSCTL_LONG(parent, nbr, name, access, ptr, val, descr) \ 330 SYSCTL_ASSERT_TYPE(LONG, ptr, parent, name); \ 331 SYSCTL_OID(parent, nbr, name, \ 332 CTLTYPE_LONG | CTLFLAG_MPSAFE | (access), \ 333 ptr, val, sysctl_handle_long, "L", descr) 334 335#define SYSCTL_ADD_LONG(ctx, parent, nbr, name, access, ptr, descr) \ 336 sysctl_add_oid(ctx, parent, nbr, name, \ 337 CTLTYPE_LONG | CTLFLAG_MPSAFE | (access), \ 338 SYSCTL_ADD_ASSERT_TYPE(LONG, ptr), 0, \ 339 sysctl_handle_long, "L", __DESCR(descr)) 340 341/* Oid for an unsigned long. The pointer must be non NULL. */ 342#define SYSCTL_ULONG(parent, nbr, name, access, ptr, val, descr) \ 343 SYSCTL_ASSERT_TYPE(ULONG, ptr, parent, name); \ 344 SYSCTL_OID(parent, nbr, name, \ 345 CTLTYPE_ULONG | CTLFLAG_MPSAFE | (access), \ 346 ptr, val, sysctl_handle_long, "LU", descr) 347 348#define SYSCTL_ADD_ULONG(ctx, parent, nbr, name, access, ptr, descr) \ 349 sysctl_add_oid(ctx, parent, nbr, name, \ 350 CTLTYPE_ULONG | CTLFLAG_MPSAFE | (access), \ 351 SYSCTL_ADD_ASSERT_TYPE(ULONG, ptr), 0, \ 352 sysctl_handle_long, "LU", __DESCR(descr)) 353 354/* Oid for a quad. The pointer must be non NULL. */ 355#define SYSCTL_QUAD(parent, nbr, name, access, ptr, val, descr) \ 356 SYSCTL_ASSERT_TYPE(INT64, ptr, parent, name); \ 357 SYSCTL_OID(parent, nbr, name, \ 358 CTLTYPE_S64 | CTLFLAG_MPSAFE | (access), \ 359 ptr, val, sysctl_handle_64, "Q", descr) 360 361#define SYSCTL_ADD_QUAD(ctx, parent, nbr, name, access, ptr, descr) \ 362 sysctl_add_oid(ctx, parent, nbr, name, \ 363 CTLTYPE_S64 | CTLFLAG_MPSAFE | (access), \ 364 SYSCTL_ADD_ASSERT_TYPE(INT64, ptr), 0, \ 365 sysctl_handle_64, "Q", __DESCR(descr)) 366 367#define SYSCTL_UQUAD(parent, nbr, name, access, ptr, val, descr) \ 368 SYSCTL_ASSERT_TYPE(UINT64, ptr, parent, name); \ 369 SYSCTL_OID(parent, nbr, name, \ 370 CTLTYPE_U64 | CTLFLAG_MPSAFE | (access), \ 371 ptr, val, sysctl_handle_64, "QU", descr) 372 373#define SYSCTL_ADD_UQUAD(ctx, parent, nbr, name, access, ptr, descr) \ 374 sysctl_add_oid(ctx, parent, nbr, name, \ 375 CTLTYPE_U64 | CTLFLAG_MPSAFE | (access), \ 376 SYSCTL_ADD_ASSERT_TYPE(UINT64, ptr), 0, \ 377 sysctl_handle_64, "QU", __DESCR(descr)) 378 379/* Oid for an opaque object. Specified by a pointer and a length. */ 380#define SYSCTL_OPAQUE(parent, nbr, name, access, ptr, len, fmt, descr) \ 381 SYSCTL_OID(parent, nbr, name, CTLTYPE_OPAQUE|(access), \ 382 ptr, len, sysctl_handle_opaque, fmt, descr) 383 384#define SYSCTL_ADD_OPAQUE(ctx, parent, nbr, name, access, ptr, len, fmt, descr)\ 385 sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_OPAQUE|(access), \ 386 ptr, len, sysctl_handle_opaque, fmt, __DESCR(descr)) 387 388/* Oid for a struct. Specified by a pointer and a type. */ 389#define SYSCTL_STRUCT(parent, nbr, name, access, ptr, type, descr) \ 390 SYSCTL_OID(parent, nbr, name, CTLTYPE_OPAQUE|(access), \ 391 ptr, sizeof(struct type), sysctl_handle_opaque, \ 392 "S," #type, descr) 393 394#define SYSCTL_ADD_STRUCT(ctx, parent, nbr, name, access, ptr, type, descr) \ 395 sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_OPAQUE|(access), \ 396 ptr, sizeof(struct type), sysctl_handle_opaque, "S," #type, __DESCR(descr)) 397 398/* Oid for a procedure. Specified by a pointer and an arg. */ 399#define SYSCTL_PROC(parent, nbr, name, access, ptr, arg, handler, fmt, descr) \ 400 CTASSERT(((access) & CTLTYPE) != 0); \ 401 SYSCTL_OID(parent, nbr, name, (access), \ 402 ptr, arg, handler, fmt, descr) 403 404#define SYSCTL_ADD_PROC(ctx, parent, nbr, name, access, ptr, arg, handler, fmt, descr) \ 405 sysctl_add_oid(ctx, parent, nbr, name, (access), \ 406 ptr, arg, handler, fmt, __DESCR(descr)) 407 408/* 409 * A macro to generate a read-only sysctl to indicate the presense of optional 410 * kernel features. 411 */ 412#define FEATURE(name, desc) \ 413 SYSCTL_INT(_kern_features, OID_AUTO, name, CTLFLAG_RD | CTLFLAG_CAPRD, \ 414 0, 1, desc) 415 416#endif /* _KERNEL */ 417 418/* 419 * Top-level identifiers 420 */ 421#define CTL_UNSPEC 0 /* unused */ 422#define CTL_KERN 1 /* "high kernel": proc, limits */ 423#define CTL_VM 2 /* virtual memory */ 424#define CTL_VFS 3 /* filesystem, mount type is next */ 425#define CTL_NET 4 /* network, see socket.h */ 426#define CTL_DEBUG 5 /* debugging parameters */ 427#define CTL_HW 6 /* generic cpu/io */ 428#define CTL_MACHDEP 7 /* machine dependent */ 429#define CTL_USER 8 /* user-level */ 430#define CTL_P1003_1B 9 /* POSIX 1003.1B */ 431#define CTL_MAXID 10 /* number of valid top-level ids */ 432 433#define CTL_NAMES { \ 434 { 0, 0 }, \ 435 { "kern", CTLTYPE_NODE }, \ 436 { "vm", CTLTYPE_NODE }, \ 437 { "vfs", CTLTYPE_NODE }, \ 438 { "net", CTLTYPE_NODE }, \ 439 { "debug", CTLTYPE_NODE }, \ 440 { "hw", CTLTYPE_NODE }, \ 441 { "machdep", CTLTYPE_NODE }, \ 442 { "user", CTLTYPE_NODE }, \ 443 { "p1003_1b", CTLTYPE_NODE }, \ 444} 445 446/* 447 * CTL_KERN identifiers 448 */ 449#define KERN_OSTYPE 1 /* string: system version */ 450#define KERN_OSRELEASE 2 /* string: system release */ 451#define KERN_OSREV 3 /* int: system revision */ 452#define KERN_VERSION 4 /* string: compile time info */ 453#define KERN_MAXVNODES 5 /* int: max vnodes */ 454#define KERN_MAXPROC 6 /* int: max processes */ 455#define KERN_MAXFILES 7 /* int: max open files */ 456#define KERN_ARGMAX 8 /* int: max arguments to exec */ 457#define KERN_SECURELVL 9 /* int: system security level */ 458#define KERN_HOSTNAME 10 /* string: hostname */ 459#define KERN_HOSTID 11 /* int: host identifier */ 460#define KERN_CLOCKRATE 12 /* struct: struct clockrate */ 461#define KERN_VNODE 13 /* struct: vnode structures */ 462#define KERN_PROC 14 /* struct: process entries */ 463#define KERN_FILE 15 /* struct: file entries */ 464#define KERN_PROF 16 /* node: kernel profiling info */ 465#define KERN_POSIX1 17 /* int: POSIX.1 version */ 466#define KERN_NGROUPS 18 /* int: # of supplemental group ids */ 467#define KERN_JOB_CONTROL 19 /* int: is job control available */ 468#define KERN_SAVED_IDS 20 /* int: saved set-user/group-ID */ 469#define KERN_BOOTTIME 21 /* struct: time kernel was booted */ 470#define KERN_NISDOMAINNAME 22 /* string: YP domain name */ 471#define KERN_UPDATEINTERVAL 23 /* int: update process sleep time */ 472#define KERN_OSRELDATE 24 /* int: kernel release date */ 473#define KERN_NTP_PLL 25 /* node: NTP PLL control */ 474#define KERN_BOOTFILE 26 /* string: name of booted kernel */ 475#define KERN_MAXFILESPERPROC 27 /* int: max open files per proc */ 476#define KERN_MAXPROCPERUID 28 /* int: max processes per uid */ 477#define KERN_DUMPDEV 29 /* struct cdev *: device to dump on */ 478#define KERN_IPC 30 /* node: anything related to IPC */ 479#define KERN_DUMMY 31 /* unused */ 480#define KERN_PS_STRINGS 32 /* int: address of PS_STRINGS */ 481#define KERN_USRSTACK 33 /* int: address of USRSTACK */ 482#define KERN_LOGSIGEXIT 34 /* int: do we log sigexit procs? */ 483#define KERN_IOV_MAX 35 /* int: value of UIO_MAXIOV */ 484#define KERN_HOSTUUID 36 /* string: host UUID identifier */ 485#define KERN_ARND 37 /* int: from arc4rand() */ 486#define KERN_MAXID 38 /* number of valid kern ids */ 487 488#define CTL_KERN_NAMES { \ 489 { 0, 0 }, \ 490 { "ostype", CTLTYPE_STRING }, \ 491 { "osrelease", CTLTYPE_STRING }, \ 492 { "osrevision", CTLTYPE_INT }, \ 493 { "version", CTLTYPE_STRING }, \ 494 { "maxvnodes", CTLTYPE_INT }, \ 495 { "maxproc", CTLTYPE_INT }, \ 496 { "maxfiles", CTLTYPE_INT }, \ 497 { "argmax", CTLTYPE_INT }, \ 498 { "securelevel", CTLTYPE_INT }, \ 499 { "hostname", CTLTYPE_STRING }, \ 500 { "hostid", CTLTYPE_UINT }, \ 501 { "clockrate", CTLTYPE_STRUCT }, \ 502 { "vnode", CTLTYPE_STRUCT }, \ 503 { "proc", CTLTYPE_STRUCT }, \ 504 { "file", CTLTYPE_STRUCT }, \ 505 { "profiling", CTLTYPE_NODE }, \ 506 { "posix1version", CTLTYPE_INT }, \ 507 { "ngroups", CTLTYPE_INT }, \ 508 { "job_control", CTLTYPE_INT }, \ 509 { "saved_ids", CTLTYPE_INT }, \ 510 { "boottime", CTLTYPE_STRUCT }, \ 511 { "nisdomainname", CTLTYPE_STRING }, \ 512 { "update", CTLTYPE_INT }, \ 513 { "osreldate", CTLTYPE_INT }, \ 514 { "ntp_pll", CTLTYPE_NODE }, \ 515 { "bootfile", CTLTYPE_STRING }, \ 516 { "maxfilesperproc", CTLTYPE_INT }, \ 517 { "maxprocperuid", CTLTYPE_INT }, \ 518 { "ipc", CTLTYPE_NODE }, \ 519 { "dummy", CTLTYPE_INT }, \ 520 { "ps_strings", CTLTYPE_INT }, \ 521 { "usrstack", CTLTYPE_INT }, \ 522 { "logsigexit", CTLTYPE_INT }, \ 523 { "iov_max", CTLTYPE_INT }, \ 524 { "hostuuid", CTLTYPE_STRING }, \ 525 { "arc4rand", CTLTYPE_OPAQUE }, \ 526} 527 528/* 529 * CTL_VFS identifiers 530 */ 531#define CTL_VFS_NAMES { \ 532 { "vfsconf", CTLTYPE_STRUCT }, \ 533} 534 535/* 536 * KERN_PROC subtypes 537 */ 538#define KERN_PROC_ALL 0 /* everything */ 539#define KERN_PROC_PID 1 /* by process id */ 540#define KERN_PROC_PGRP 2 /* by process group id */ 541#define KERN_PROC_SESSION 3 /* by session of pid */ 542#define KERN_PROC_TTY 4 /* by controlling tty */ 543#define KERN_PROC_UID 5 /* by effective uid */ 544#define KERN_PROC_RUID 6 /* by real uid */ 545#define KERN_PROC_ARGS 7 /* get/set arguments/proctitle */ 546#define KERN_PROC_PROC 8 /* only return procs */ 547#define KERN_PROC_SV_NAME 9 /* get syscall vector name */ 548#define KERN_PROC_RGID 10 /* by real group id */ 549#define KERN_PROC_GID 11 /* by effective group id */ 550#define KERN_PROC_PATHNAME 12 /* path to executable */ 551#define KERN_PROC_OVMMAP 13 /* Old VM map entries for process */ 552#define KERN_PROC_OFILEDESC 14 /* Old file descriptors for process */ 553#define KERN_PROC_KSTACK 15 /* Kernel stacks for process */ 554#define KERN_PROC_INC_THREAD 0x10 /* 555 * modifier for pid, pgrp, tty, 556 * uid, ruid, gid, rgid and proc 557 * This effectively uses 16-31 558 */ 559#define KERN_PROC_VMMAP 32 /* VM map entries for process */ 560#define KERN_PROC_FILEDESC 33 /* File descriptors for process */ 561#define KERN_PROC_GROUPS 34 /* process groups */ 562#define KERN_PROC_ENV 35 /* get environment */ 563#define KERN_PROC_AUXV 36 /* get ELF auxiliary vector */ 564#define KERN_PROC_RLIMIT 37 /* process resource limits */ 565#define KERN_PROC_PS_STRINGS 38 /* get ps_strings location */ 566 567/* 568 * KERN_IPC identifiers 569 */ 570#define KIPC_MAXSOCKBUF 1 /* int: max size of a socket buffer */ 571#define KIPC_SOCKBUF_WASTE 2 /* int: wastage factor in sockbuf */ 572#define KIPC_SOMAXCONN 3 /* int: max length of connection q */ 573#define KIPC_MAX_LINKHDR 4 /* int: max length of link header */ 574#define KIPC_MAX_PROTOHDR 5 /* int: max length of network header */ 575#define KIPC_MAX_HDR 6 /* int: max total length of headers */ 576#define KIPC_MAX_DATALEN 7 /* int: max length of data? */ 577 578/* 579 * CTL_HW identifiers 580 */ 581#define HW_MACHINE 1 /* string: machine class */ 582#define HW_MODEL 2 /* string: specific machine model */ 583#define HW_NCPU 3 /* int: number of cpus */ 584#define HW_BYTEORDER 4 /* int: machine byte order */ 585#define HW_PHYSMEM 5 /* int: total memory */ 586#define HW_USERMEM 6 /* int: non-kernel memory */ 587#define HW_PAGESIZE 7 /* int: software page size */ 588#define HW_DISKNAMES 8 /* strings: disk drive names */ 589#define HW_DISKSTATS 9 /* struct: diskstats[] */ 590#define HW_FLOATINGPT 10 /* int: has HW floating point? */ 591#define HW_MACHINE_ARCH 11 /* string: machine architecture */ 592#define HW_REALMEM 12 /* int: 'real' memory */ 593#define HW_MAXID 13 /* number of valid hw ids */ 594 595#define CTL_HW_NAMES { \ 596 { 0, 0 }, \ 597 { "machine", CTLTYPE_STRING }, \ 598 { "model", CTLTYPE_STRING }, \ 599 { "ncpu", CTLTYPE_INT }, \ 600 { "byteorder", CTLTYPE_INT }, \ 601 { "physmem", CTLTYPE_ULONG }, \ 602 { "usermem", CTLTYPE_ULONG }, \ 603 { "pagesize", CTLTYPE_INT }, \ 604 { "disknames", CTLTYPE_STRUCT }, \ 605 { "diskstats", CTLTYPE_STRUCT }, \ 606 { "floatingpoint", CTLTYPE_INT }, \ 607 { "machine_arch", CTLTYPE_STRING }, \ 608 { "realmem", CTLTYPE_ULONG }, \ 609} 610 611/* 612 * CTL_USER definitions 613 */ 614#define USER_CS_PATH 1 /* string: _CS_PATH */ 615#define USER_BC_BASE_MAX 2 /* int: BC_BASE_MAX */ 616#define USER_BC_DIM_MAX 3 /* int: BC_DIM_MAX */ 617#define USER_BC_SCALE_MAX 4 /* int: BC_SCALE_MAX */ 618#define USER_BC_STRING_MAX 5 /* int: BC_STRING_MAX */ 619#define USER_COLL_WEIGHTS_MAX 6 /* int: COLL_WEIGHTS_MAX */ 620#define USER_EXPR_NEST_MAX 7 /* int: EXPR_NEST_MAX */ 621#define USER_LINE_MAX 8 /* int: LINE_MAX */ 622#define USER_RE_DUP_MAX 9 /* int: RE_DUP_MAX */ 623#define USER_POSIX2_VERSION 10 /* int: POSIX2_VERSION */ 624#define USER_POSIX2_C_BIND 11 /* int: POSIX2_C_BIND */ 625#define USER_POSIX2_C_DEV 12 /* int: POSIX2_C_DEV */ 626#define USER_POSIX2_CHAR_TERM 13 /* int: POSIX2_CHAR_TERM */ 627#define USER_POSIX2_FORT_DEV 14 /* int: POSIX2_FORT_DEV */ 628#define USER_POSIX2_FORT_RUN 15 /* int: POSIX2_FORT_RUN */ 629#define USER_POSIX2_LOCALEDEF 16 /* int: POSIX2_LOCALEDEF */ 630#define USER_POSIX2_SW_DEV 17 /* int: POSIX2_SW_DEV */ 631#define USER_POSIX2_UPE 18 /* int: POSIX2_UPE */ 632#define USER_STREAM_MAX 19 /* int: POSIX2_STREAM_MAX */ 633#define USER_TZNAME_MAX 20 /* int: POSIX2_TZNAME_MAX */ 634#define USER_MAXID 21 /* number of valid user ids */ 635 636#define CTL_USER_NAMES { \ 637 { 0, 0 }, \ 638 { "cs_path", CTLTYPE_STRING }, \ 639 { "bc_base_max", CTLTYPE_INT }, \ 640 { "bc_dim_max", CTLTYPE_INT }, \ 641 { "bc_scale_max", CTLTYPE_INT }, \ 642 { "bc_string_max", CTLTYPE_INT }, \ 643 { "coll_weights_max", CTLTYPE_INT }, \ 644 { "expr_nest_max", CTLTYPE_INT }, \ 645 { "line_max", CTLTYPE_INT }, \ 646 { "re_dup_max", CTLTYPE_INT }, \ 647 { "posix2_version", CTLTYPE_INT }, \ 648 { "posix2_c_bind", CTLTYPE_INT }, \ 649 { "posix2_c_dev", CTLTYPE_INT }, \ 650 { "posix2_char_term", CTLTYPE_INT }, \ 651 { "posix2_fort_dev", CTLTYPE_INT }, \ 652 { "posix2_fort_run", CTLTYPE_INT }, \ 653 { "posix2_localedef", CTLTYPE_INT }, \ 654 { "posix2_sw_dev", CTLTYPE_INT }, \ 655 { "posix2_upe", CTLTYPE_INT }, \ 656 { "stream_max", CTLTYPE_INT }, \ 657 { "tzname_max", CTLTYPE_INT }, \ 658} 659 660#define CTL_P1003_1B_ASYNCHRONOUS_IO 1 /* boolean */ 661#define CTL_P1003_1B_MAPPED_FILES 2 /* boolean */ 662#define CTL_P1003_1B_MEMLOCK 3 /* boolean */ 663#define CTL_P1003_1B_MEMLOCK_RANGE 4 /* boolean */ 664#define CTL_P1003_1B_MEMORY_PROTECTION 5 /* boolean */ 665#define CTL_P1003_1B_MESSAGE_PASSING 6 /* boolean */ 666#define CTL_P1003_1B_PRIORITIZED_IO 7 /* boolean */ 667#define CTL_P1003_1B_PRIORITY_SCHEDULING 8 /* boolean */ 668#define CTL_P1003_1B_REALTIME_SIGNALS 9 /* boolean */ 669#define CTL_P1003_1B_SEMAPHORES 10 /* boolean */ 670#define CTL_P1003_1B_FSYNC 11 /* boolean */ 671#define CTL_P1003_1B_SHARED_MEMORY_OBJECTS 12 /* boolean */ 672#define CTL_P1003_1B_SYNCHRONIZED_IO 13 /* boolean */ 673#define CTL_P1003_1B_TIMERS 14 /* boolean */ 674#define CTL_P1003_1B_AIO_LISTIO_MAX 15 /* int */ 675#define CTL_P1003_1B_AIO_MAX 16 /* int */ 676#define CTL_P1003_1B_AIO_PRIO_DELTA_MAX 17 /* int */ 677#define CTL_P1003_1B_DELAYTIMER_MAX 18 /* int */ 678#define CTL_P1003_1B_MQ_OPEN_MAX 19 /* int */ 679#define CTL_P1003_1B_PAGESIZE 20 /* int */ 680#define CTL_P1003_1B_RTSIG_MAX 21 /* int */ 681#define CTL_P1003_1B_SEM_NSEMS_MAX 22 /* int */ 682#define CTL_P1003_1B_SEM_VALUE_MAX 23 /* int */ 683#define CTL_P1003_1B_SIGQUEUE_MAX 24 /* int */ 684#define CTL_P1003_1B_TIMER_MAX 25 /* int */ 685 686#define CTL_P1003_1B_MAXID 26 687 688#define CTL_P1003_1B_NAMES { \ 689 { 0, 0 }, \ 690 { "asynchronous_io", CTLTYPE_INT }, \ 691 { "mapped_files", CTLTYPE_INT }, \ 692 { "memlock", CTLTYPE_INT }, \ 693 { "memlock_range", CTLTYPE_INT }, \ 694 { "memory_protection", CTLTYPE_INT }, \ 695 { "message_passing", CTLTYPE_INT }, \ 696 { "prioritized_io", CTLTYPE_INT }, \ 697 { "priority_scheduling", CTLTYPE_INT }, \ 698 { "realtime_signals", CTLTYPE_INT }, \ 699 { "semaphores", CTLTYPE_INT }, \ 700 { "fsync", CTLTYPE_INT }, \ 701 { "shared_memory_objects", CTLTYPE_INT }, \ 702 { "synchronized_io", CTLTYPE_INT }, \ 703 { "timers", CTLTYPE_INT }, \ 704 { "aio_listio_max", CTLTYPE_INT }, \ 705 { "aio_max", CTLTYPE_INT }, \ 706 { "aio_prio_delta_max", CTLTYPE_INT }, \ 707 { "delaytimer_max", CTLTYPE_INT }, \ 708 { "mq_open_max", CTLTYPE_INT }, \ 709 { "pagesize", CTLTYPE_INT }, \ 710 { "rtsig_max", CTLTYPE_INT }, \ 711 { "nsems_max", CTLTYPE_INT }, \ 712 { "sem_value_max", CTLTYPE_INT }, \ 713 { "sigqueue_max", CTLTYPE_INT }, \ 714 { "timer_max", CTLTYPE_INT }, \ 715} 716 717#ifdef _KERNEL 718 719/* 720 * Declare some common oids. 721 */ 722extern struct sysctl_oid_list sysctl__children; 723SYSCTL_DECL(_kern); 724SYSCTL_DECL(_kern_features); 725SYSCTL_DECL(_kern_ipc); 726SYSCTL_DECL(_kern_proc); 727SYSCTL_DECL(_kern_sched); 728SYSCTL_DECL(_kern_sched_stats); 729SYSCTL_DECL(_sysctl); 730SYSCTL_DECL(_vm); 731SYSCTL_DECL(_vm_stats); 732SYSCTL_DECL(_vm_stats_misc); 733SYSCTL_DECL(_vfs); 734SYSCTL_DECL(_net); 735SYSCTL_DECL(_debug); 736SYSCTL_DECL(_debug_sizeof); 737SYSCTL_DECL(_dev); 738SYSCTL_DECL(_hw); 739SYSCTL_DECL(_hw_bus); 740SYSCTL_DECL(_hw_bus_devices); 741SYSCTL_DECL(_hw_bus_info); 742SYSCTL_DECL(_machdep); 743SYSCTL_DECL(_user); 744SYSCTL_DECL(_compat); 745SYSCTL_DECL(_regression); 746SYSCTL_DECL(_security); 747SYSCTL_DECL(_security_bsd); 748 749extern char machine[]; 750extern char osrelease[]; 751extern char ostype[]; 752extern char kern_ident[]; 753 754/* Dynamic oid handling */ 755struct sysctl_oid *sysctl_add_oid(struct sysctl_ctx_list *clist, 756 struct sysctl_oid_list *parent, int nbr, const char *name, 757 int kind, void *arg1, intptr_t arg2, 758 int (*handler) (SYSCTL_HANDLER_ARGS), 759 const char *fmt, const char *descr); 760int sysctl_remove_name(struct sysctl_oid *parent, const char *name, int del, 761 int recurse); 762void sysctl_rename_oid(struct sysctl_oid *oidp, const char *name); 763int sysctl_move_oid(struct sysctl_oid *oidp, 764 struct sysctl_oid_list *parent); 765int sysctl_remove_oid(struct sysctl_oid *oidp, int del, int recurse); 766int sysctl_ctx_init(struct sysctl_ctx_list *clist); 767int sysctl_ctx_free(struct sysctl_ctx_list *clist); 768struct sysctl_ctx_entry *sysctl_ctx_entry_add(struct sysctl_ctx_list *clist, 769 struct sysctl_oid *oidp); 770struct sysctl_ctx_entry *sysctl_ctx_entry_find(struct sysctl_ctx_list *clist, 771 struct sysctl_oid *oidp); 772int sysctl_ctx_entry_del(struct sysctl_ctx_list *clist, 773 struct sysctl_oid *oidp); 774 775int kernel_sysctl(struct thread *td, int *name, u_int namelen, void *old, 776 size_t *oldlenp, void *new, size_t newlen, 777 size_t *retval, int flags); 778int kernel_sysctlbyname(struct thread *td, char *name, 779 void *old, size_t *oldlenp, void *new, size_t newlen, 780 size_t *retval, int flags); 781int userland_sysctl(struct thread *td, int *name, u_int namelen, void *old, 782 size_t *oldlenp, int inkernel, void *new, size_t newlen, 783 size_t *retval, int flags); 784int sysctl_find_oid(int *name, u_int namelen, struct sysctl_oid **noid, 785 int *nindx, struct sysctl_req *req); 786void sysctl_lock(void); 787void sysctl_unlock(void); 788int sysctl_wire_old_buffer(struct sysctl_req *req, size_t len); 789 790struct sbuf; 791struct sbuf *sbuf_new_for_sysctl(struct sbuf *, char *, int, 792 struct sysctl_req *); 793#else /* !_KERNEL */ 794#include <sys/cdefs.h> 795 796__BEGIN_DECLS 797int sysctl(const int *, u_int, void *, size_t *, const void *, size_t); 798int sysctlbyname(const char *, void *, size_t *, const void *, size_t); 799int sysctlnametomib(const char *, int *, size_t *); 800__END_DECLS 801#endif /* _KERNEL */ 802 803#endif /* !_SYS_SYSCTL_H_ */ 804