sysctl.h revision 194935
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 194935 2009-06-25 01:31:59Z jeff $ 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_QUAD 4 /* name describes a 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 76#define CTLFLAG_RD 0x80000000 /* Allow reads of variable */ 77#define CTLFLAG_WR 0x40000000 /* Allow writes to the variable */ 78#define CTLFLAG_RW (CTLFLAG_RD|CTLFLAG_WR) 79#define CTLFLAG_NOLOCK 0x20000000 /* XXX Don't Lock */ 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_RDTUN (CTLFLAG_RD|CTLFLAG_TUN) 89 90/* 91 * Secure level. Note that CTLFLAG_SECURE == CTLFLAG_SECURE1. 92 * 93 * Secure when the securelevel is raised to at least N. 94 */ 95#define CTLSHIFT_SECURE 20 96#define CTLFLAG_SECURE1 (CTLFLAG_SECURE | (0 << CTLSHIFT_SECURE)) 97#define CTLFLAG_SECURE2 (CTLFLAG_SECURE | (1 << CTLSHIFT_SECURE)) 98#define CTLFLAG_SECURE3 (CTLFLAG_SECURE | (2 << CTLSHIFT_SECURE)) 99 100/* 101 * USE THIS instead of a hardwired number from the categories below 102 * to get dynamically assigned sysctl entries using the linker-set 103 * technology. This is the way nearly all new sysctl variables should 104 * be implemented. 105 * e.g. SYSCTL_INT(_parent, OID_AUTO, name, CTLFLAG_RW, &variable, 0, ""); 106 */ 107#define OID_AUTO (-1) 108 109/* 110 * The starting number for dynamically-assigned entries. WARNING! 111 * ALL static sysctl entries should have numbers LESS than this! 112 */ 113#define CTL_AUTO_START 0x100 114 115#ifdef _KERNEL 116#define SYSCTL_HANDLER_ARGS struct sysctl_oid *oidp, void *arg1, int arg2, \ 117 struct sysctl_req *req 118 119/* definitions for sysctl_req 'lock' member */ 120#define REQ_UNLOCKED 0 /* not locked and not wired */ 121#define REQ_LOCKED 1 /* locked and not wired */ 122#define REQ_WIRED 2 /* locked and wired */ 123 124/* definitions for sysctl_req 'flags' member */ 125#if defined(__amd64__) || defined(__ia64__) 126#define SCTL_MASK32 1 /* 32 bit emulation */ 127#endif 128 129/* 130 * This describes the access space for a sysctl request. This is needed 131 * so that we can use the interface from the kernel or from user-space. 132 */ 133struct sysctl_req { 134 struct thread *td; /* used for access checking */ 135 int lock; /* locking/wiring state */ 136 void *oldptr; 137 size_t oldlen; 138 size_t oldidx; 139 int (*oldfunc)(struct sysctl_req *, const void *, size_t); 140 void *newptr; 141 size_t newlen; 142 size_t newidx; 143 int (*newfunc)(struct sysctl_req *, void *, size_t); 144 size_t validlen; 145 int flags; 146}; 147 148SLIST_HEAD(sysctl_oid_list, sysctl_oid); 149 150/* 151 * This describes one "oid" in the MIB tree. Potentially more nodes can 152 * be hidden behind it, expanded by the handler. 153 */ 154struct sysctl_oid { 155 struct sysctl_oid_list *oid_parent; 156 SLIST_ENTRY(sysctl_oid) oid_link; 157 int oid_number; 158 u_int oid_kind; 159 void *oid_arg1; 160 int oid_arg2; 161 const char *oid_name; 162 int (*oid_handler)(SYSCTL_HANDLER_ARGS); 163 const char *oid_fmt; 164 int oid_refcnt; 165 const char *oid_descr; 166 short oid_v_subs; 167 short oid_v_mod; 168}; 169 170#define SYSCTL_IN(r, p, l) (r->newfunc)(r, p, l) 171#define SYSCTL_OUT(r, p, l) (r->oldfunc)(r, p, l) 172 173int sysctl_handle_int(SYSCTL_HANDLER_ARGS); 174int sysctl_msec_to_ticks(SYSCTL_HANDLER_ARGS); 175int sysctl_handle_long(SYSCTL_HANDLER_ARGS); 176int sysctl_handle_quad(SYSCTL_HANDLER_ARGS); 177int sysctl_handle_intptr(SYSCTL_HANDLER_ARGS); 178int sysctl_handle_string(SYSCTL_HANDLER_ARGS); 179int sysctl_handle_opaque(SYSCTL_HANDLER_ARGS); 180 181int sysctl_dpcpu_int(SYSCTL_HANDLER_ARGS); 182int sysctl_dpcpu_long(SYSCTL_HANDLER_ARGS); 183int sysctl_dpcpu_quad(SYSCTL_HANDLER_ARGS); 184 185#ifdef VIMAGE 186int sysctl_handle_v_int(SYSCTL_HANDLER_ARGS); 187int sysctl_handle_v_string(SYSCTL_HANDLER_ARGS); 188int sysctl_handle_v_opaque(SYSCTL_HANDLER_ARGS); 189#endif 190 191/* 192 * These functions are used to add/remove an oid from the mib. 193 */ 194void sysctl_register_oid(struct sysctl_oid *oidp); 195void sysctl_unregister_oid(struct sysctl_oid *oidp); 196 197/* Declare a static oid to allow child oids to be added to it. */ 198#define SYSCTL_DECL(name) \ 199 extern struct sysctl_oid_list sysctl_##name##_children 200 201/* Hide these in macros */ 202#define SYSCTL_CHILDREN(oid_ptr) (struct sysctl_oid_list *) \ 203 (oid_ptr)->oid_arg1 204#define SYSCTL_CHILDREN_SET(oid_ptr, val) \ 205 (oid_ptr)->oid_arg1 = (val); 206#define SYSCTL_STATIC_CHILDREN(oid_name) \ 207 (&sysctl_##oid_name##_children) 208 209/* === Structs and macros related to context handling === */ 210 211/* All dynamically created sysctls can be tracked in a context list. */ 212struct sysctl_ctx_entry { 213 struct sysctl_oid *entry; 214 TAILQ_ENTRY(sysctl_ctx_entry) link; 215}; 216 217TAILQ_HEAD(sysctl_ctx_list, sysctl_ctx_entry); 218 219#define SYSCTL_NODE_CHILDREN(parent, name) \ 220 sysctl_##parent##_##name##_children 221 222#ifndef NO_SYSCTL_DESCR 223#define __DESCR(d) d 224#else 225#define __DESCR(d) "" 226#endif 227 228/* This constructs a "raw" MIB oid. */ 229#define SYSCTL_OID(parent, nbr, name, kind, a1, a2, handler, fmt, descr) \ 230 static struct sysctl_oid sysctl__##parent##_##name = { \ 231 &sysctl_##parent##_children, { NULL }, nbr, kind, \ 232 a1, a2, #name, handler, fmt, 0, __DESCR(descr) }; \ 233 DATA_SET(sysctl_set, sysctl__##parent##_##name) 234 235#ifdef VIMAGE 236#define SYSCTL_V_OID(subs, mod, parent, nbr, name, kind, a1, a2, \ 237 handler, fmt, descr) \ 238 static struct sysctl_oid sysctl__##parent##_##name = { \ 239 &sysctl_##parent##_children, { 0 }, nbr, kind, \ 240 (void *) offsetof(struct mod, _##a1), a2, #name, \ 241 handler, fmt, 0, __DESCR(descr), subs, V_MOD_##mod }; \ 242 DATA_SET(sysctl_set, sysctl__##parent##_##name) 243#else 244#ifdef VIMAGE_GLOBALS 245#define SYSCTL_V_OID(subs, mod, parent, nbr, name, kind, a1, a2, \ 246 handler, fmt, descr) \ 247 SYSCTL_OID(parent, nbr, name, kind, &a1, a2, handler, fmt, descr) 248#else 249#define SYSCTL_V_OID(subs, mod, parent, nbr, name, kind, a1, a2, \ 250 handler, fmt, descr) \ 251 SYSCTL_OID(parent, nbr, name, kind, & mod ## _0._ ## a1, a2, \ 252 handler, fmt, descr) 253#endif 254#endif 255 256#define SYSCTL_ADD_OID(ctx, parent, nbr, name, kind, a1, a2, handler, fmt, descr) \ 257 sysctl_add_oid(ctx, parent, nbr, name, kind, a1, a2, handler, fmt, __DESCR(descr)) 258 259/* This constructs a node from which other oids can hang. */ 260#define SYSCTL_NODE(parent, nbr, name, access, handler, descr) \ 261 struct sysctl_oid_list SYSCTL_NODE_CHILDREN(parent, name); \ 262 SYSCTL_OID(parent, nbr, name, CTLTYPE_NODE|(access), \ 263 (void*)&SYSCTL_NODE_CHILDREN(parent, name), 0, handler, "N", descr) 264 265#define SYSCTL_ADD_NODE(ctx, parent, nbr, name, access, handler, descr) \ 266 sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_NODE|(access), \ 267 NULL, 0, handler, "N", __DESCR(descr)) 268 269/* Oid for a string. len can be 0 to indicate '\0' termination. */ 270#define SYSCTL_STRING(parent, nbr, name, access, arg, len, descr) \ 271 SYSCTL_OID(parent, nbr, name, CTLTYPE_STRING|(access), \ 272 arg, len, sysctl_handle_string, "A", descr) 273 274#ifdef VIMAGE 275#define SYSCTL_V_STRING(subs, mod, parent, nbr, name, access, sym, len, descr) \ 276 SYSCTL_V_OID(subs, mod, parent, nbr, name, CTLTYPE_STRING|(access), \ 277 sym, len, sysctl_handle_v_string, "A", descr) 278#else 279#ifdef VIMAGE_GLOBALS 280#define SYSCTL_V_STRING(subs, mod, parent, nbr, name, access, sym, len, descr) \ 281 SYSCTL_OID(parent, nbr, name, CTLTYPE_STRING|(access), \ 282 &sym, len, sysctl_handle_string, "A", descr) 283#else 284#define SYSCTL_V_STRING(subs, mod, parent, nbr, name, access, sym, len, descr) \ 285 SYSCTL_OID(parent, nbr, name, CTLTYPE_STRING|(access), \ 286 & mod ## _0._ ## sym, len, sysctl_handle_string, "A", descr) 287#endif 288#endif 289 290#define SYSCTL_ADD_STRING(ctx, parent, nbr, name, access, arg, len, descr) \ 291 sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_STRING|(access), \ 292 arg, len, sysctl_handle_string, "A", __DESCR(descr)) 293 294/* Oid for an int. If ptr is NULL, val is returned. */ 295#define SYSCTL_INT(parent, nbr, name, access, ptr, val, descr) \ 296 SYSCTL_OID(parent, nbr, name, CTLTYPE_INT|CTLFLAG_MPSAFE|(access), \ 297 ptr, val, sysctl_handle_int, "I", descr) 298 299#ifdef VIMAGE 300#define SYSCTL_V_INT(subs, mod, parent, nbr, name, access, sym, val, descr) \ 301 SYSCTL_V_OID(subs, mod, parent, nbr, name, \ 302 CTLTYPE_INT|CTLFLAG_MPSAFE|(access), \ 303 sym, val, sysctl_handle_v_int, "I", descr) 304#else 305#ifdef VIMAGE_GLOBALS 306#define SYSCTL_V_INT(subs, mod, parent, nbr, name, access, sym, val, descr) \ 307 SYSCTL_OID(parent, nbr, name, CTLTYPE_INT|CTLFLAG_MPSAFE|(access), \ 308 &sym, val, sysctl_handle_int, "I", descr) 309#else 310#define SYSCTL_V_INT(subs, mod, parent, nbr, name, access, sym, val, descr) \ 311 SYSCTL_OID(parent, nbr, name, CTLTYPE_INT|CTLFLAG_MPSAFE|(access), \ 312 & mod ## _0._ ## sym, val, sysctl_handle_int, "I", descr) 313#endif 314#endif 315 316#define SYSCTL_ADD_INT(ctx, parent, nbr, name, access, ptr, val, descr) \ 317 sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_INT|CTLFLAG_MPSAFE|(access), \ 318 ptr, val, sysctl_handle_int, "I", __DESCR(descr)) 319 320/* Oid for an unsigned int. If ptr is NULL, val is returned. */ 321#define SYSCTL_UINT(parent, nbr, name, access, ptr, val, descr) \ 322 SYSCTL_OID(parent, nbr, name, CTLTYPE_UINT|CTLFLAG_MPSAFE|(access), \ 323 ptr, val, sysctl_handle_int, "IU", descr) 324 325#ifdef VIMAGE 326#define SYSCTL_V_UINT(subs, mod, parent, nbr, name, access, sym, val, descr) \ 327 SYSCTL_V_OID(subs, mod, parent, nbr, name, \ 328 CTLTYPE_UINT|CTLFLAG_MPSAFE|(access), \ 329 sym, val, sysctl_handle_v_int, "IU", descr) 330#else 331#ifdef VIMAGE_GLOBALS 332#define SYSCTL_V_UINT(subs, mod, parent, nbr, name, access, sym, val, descr) \ 333 SYSCTL_OID(parent, nbr, name, CTLTYPE_UINT|CTLFLAG_MPSAFE|(access), \ 334 &sym, val, sysctl_handle_int, "IU", descr) 335#else 336#define SYSCTL_V_UINT(subs, mod, parent, nbr, name, access, sym, val, descr) \ 337 SYSCTL_OID(parent, nbr, name, CTLTYPE_UINT|CTLFLAG_MPSAFE|(access), \ 338 & mod ## _0._ ## sym, val, sysctl_handle_int, "IU", descr) 339#endif 340#endif 341 342#define SYSCTL_ADD_UINT(ctx, parent, nbr, name, access, ptr, val, descr) \ 343 sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_UINT|CTLFLAG_MPSAFE|(access), \ 344 ptr, val, sysctl_handle_int, "IU", __DESCR(descr)) 345 346#define SYSCTL_XINT(parent, nbr, name, access, ptr, val, descr) \ 347 SYSCTL_OID(parent, nbr, name, CTLTYPE_UINT|CTLFLAG_MPSAFE|(access), \ 348 ptr, val, sysctl_handle_int, "IX", descr) 349 350#define SYSCTL_ADD_XINT(ctx, parent, nbr, name, access, ptr, val, descr) \ 351 sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_UINT|CTLFLAG_MPSAFE|(access), \ 352 ptr, val, sysctl_handle_int, "IX", __DESCR(descr)) 353 354/* Oid for a long. The pointer must be non NULL. */ 355#define SYSCTL_LONG(parent, nbr, name, access, ptr, val, descr) \ 356 SYSCTL_OID(parent, nbr, name, CTLTYPE_LONG|CTLFLAG_MPSAFE|(access), \ 357 ptr, val, sysctl_handle_long, "L", descr) 358 359#define SYSCTL_ADD_LONG(ctx, parent, nbr, name, access, ptr, descr) \ 360 sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_LONG|CTLFLAG_MPSAFE|(access), \ 361 ptr, 0, sysctl_handle_long, "L", __DESCR(descr)) 362 363/* Oid for an unsigned long. The pointer must be non NULL. */ 364#define SYSCTL_ULONG(parent, nbr, name, access, ptr, val, descr) \ 365 SYSCTL_OID(parent, nbr, name, CTLTYPE_ULONG|CTLFLAG_MPSAFE|(access), \ 366 ptr, val, sysctl_handle_long, "LU", __DESCR(descr)) 367 368#define SYSCTL_ADD_ULONG(ctx, parent, nbr, name, access, ptr, descr) \ 369 sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_ULONG|CTLFLAG_MPSAFE|(access), \ 370 ptr, 0, sysctl_handle_long, "LU", __DESCR(descr)) 371 372#define SYSCTL_XLONG(parent, nbr, name, access, ptr, val, descr) \ 373 SYSCTL_OID(parent, nbr, name, CTLTYPE_ULONG|CTLFLAG_MPSAFE|(access), \ 374 ptr, val, sysctl_handle_long, "LX", __DESCR(descr)) 375 376#define SYSCTL_ADD_XLONG(ctx, parent, nbr, name, access, ptr, descr) \ 377 sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_ULONG|CTLFLAG_MPSAFE|(access), \ 378 ptr, 0, sysctl_handle_long, "LX", __DESCR(descr)) 379 380/* Oid for a quad. The pointer must be non NULL. */ 381#define SYSCTL_QUAD(parent, nbr, name, access, ptr, val, descr) \ 382 SYSCTL_OID(parent, nbr, name, CTLTYPE_QUAD|CTLFLAG_MPSAFE|(access), \ 383 ptr, val, sysctl_handle_quad, "Q", __DESCR(descr)) 384 385#define SYSCTL_ADD_QUAD(ctx, parent, nbr, name, access, ptr, descr) \ 386 sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_QUAD|CTLFLAG_MPSAFE|(access), \ 387 ptr, 0, sysctl_handle_quad, "Q", __DESCR(descr)) 388 389/* Oid for an opaque object. Specified by a pointer and a length. */ 390#define SYSCTL_OPAQUE(parent, nbr, name, access, ptr, len, fmt, descr) \ 391 SYSCTL_OID(parent, nbr, name, CTLTYPE_OPAQUE|(access), \ 392 ptr, len, sysctl_handle_opaque, fmt, descr) 393 394#define SYSCTL_ADD_OPAQUE(ctx, parent, nbr, name, access, ptr, len, fmt, descr)\ 395 sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_OPAQUE|(access), \ 396 ptr, len, sysctl_handle_opaque, fmt, __DESCR(descr)) 397 398/* Oid for a struct. Specified by a pointer and a type. */ 399#define SYSCTL_STRUCT(parent, nbr, name, access, ptr, type, descr) \ 400 SYSCTL_OID(parent, nbr, name, CTLTYPE_OPAQUE|(access), \ 401 ptr, sizeof(struct type), sysctl_handle_opaque, \ 402 "S," #type, descr) 403 404#ifdef VIMAGE 405#define SYSCTL_V_STRUCT(subs, mod, parent, nbr, name, access, sym, \ 406 type, descr) \ 407 SYSCTL_V_OID(subs, mod, parent, nbr, name, CTLTYPE_OPAQUE|(access), \ 408 sym, sizeof(struct type), sysctl_handle_v_opaque, \ 409 "S," #type, descr) 410#else 411#ifdef VIMAGE_GLOBALS 412#define SYSCTL_V_STRUCT(subs, mod, parent, nbr, name, access, sym, \ 413 type, descr) \ 414 SYSCTL_OID(parent, nbr, name, CTLTYPE_OPAQUE|(access), \ 415 &sym, sizeof(struct type), sysctl_handle_opaque, \ 416 "S," #type, descr) 417#else 418#define SYSCTL_V_STRUCT(subs, mod, parent, nbr, name, access, sym, \ 419 type, descr) \ 420 SYSCTL_OID(parent, nbr, name, CTLTYPE_OPAQUE|(access), \ 421 & mod ## _0._ ## sym, sizeof(struct type), \ 422 sysctl_handle_opaque, "S," #type, descr) 423#endif 424#endif 425 426#define SYSCTL_ADD_STRUCT(ctx, parent, nbr, name, access, ptr, type, descr) \ 427 sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_OPAQUE|(access), \ 428 ptr, sizeof(struct type), sysctl_handle_opaque, "S," #type, __DESCR(descr)) 429 430/* Oid for a procedure. Specified by a pointer and an arg. */ 431#define SYSCTL_PROC(parent, nbr, name, access, ptr, arg, handler, fmt, descr) \ 432 SYSCTL_OID(parent, nbr, name, (access), \ 433 ptr, arg, handler, fmt, descr) 434 435#define SYSCTL_V_PROC(subs, mod, parent, nbr, name, access, sym, arg, \ 436 handler, fmt, descr) \ 437 SYSCTL_V_OID(subs, mod, parent, nbr, name, (access), \ 438 sym, arg, handler, fmt, descr) 439 440#define SYSCTL_ADD_PROC(ctx, parent, nbr, name, access, ptr, arg, handler, fmt, descr) \ 441 sysctl_add_oid(ctx, parent, nbr, name, (access), \ 442 ptr, arg, handler, fmt, __DESCR(descr)) 443 444/* 445 * A macro to generate a read-only sysctl to indicate the presense of optional 446 * kernel features. 447 */ 448#define FEATURE(name, desc) \ 449 SYSCTL_INT(_kern_features, OID_AUTO, name, CTLFLAG_RD, 0, 1, desc) 450 451/* 452 * Resolve void *arg1 in a proper virtualization container. 453 */ 454#ifdef VIMAGE 455#define SYSCTL_RESOLVE_V_ARG1() do { \ 456 char *cp; \ 457 switch (oidp->oid_v_subs) { \ 458 case V_GLOBAL: \ 459 /* do nothing - this is NOT a virtualized variable! */ \ 460 break; \ 461 case V_NET: \ 462 cp = (char *) \ 463 TD_TO_VNET(req->td)->mod_data[oidp->oid_v_mod]; \ 464 arg1 = cp + (size_t) arg1; \ 465 break; \ 466 case V_PROCG: \ 467 cp = (char *) TD_TO_VPROCG(curthread); \ 468 arg1 = cp + (size_t) arg1; \ 469 break; \ 470 default: \ 471 panic("unsupported module id %d", oidp->oid_v_subs); \ 472 } \ 473} while (0) 474#else 475#define SYSCTL_RESOLVE_V_ARG1() 476#endif 477 478#endif /* _KERNEL */ 479 480/* 481 * Top-level identifiers 482 */ 483#define CTL_UNSPEC 0 /* unused */ 484#define CTL_KERN 1 /* "high kernel": proc, limits */ 485#define CTL_VM 2 /* virtual memory */ 486#define CTL_VFS 3 /* filesystem, mount type is next */ 487#define CTL_NET 4 /* network, see socket.h */ 488#define CTL_DEBUG 5 /* debugging parameters */ 489#define CTL_HW 6 /* generic cpu/io */ 490#define CTL_MACHDEP 7 /* machine dependent */ 491#define CTL_USER 8 /* user-level */ 492#define CTL_P1003_1B 9 /* POSIX 1003.1B */ 493#define CTL_MAXID 10 /* number of valid top-level ids */ 494 495#define CTL_NAMES { \ 496 { 0, 0 }, \ 497 { "kern", CTLTYPE_NODE }, \ 498 { "vm", CTLTYPE_NODE }, \ 499 { "vfs", CTLTYPE_NODE }, \ 500 { "net", CTLTYPE_NODE }, \ 501 { "debug", CTLTYPE_NODE }, \ 502 { "hw", CTLTYPE_NODE }, \ 503 { "machdep", CTLTYPE_NODE }, \ 504 { "user", CTLTYPE_NODE }, \ 505 { "p1003_1b", CTLTYPE_NODE }, \ 506} 507 508/* 509 * CTL_KERN identifiers 510 */ 511#define KERN_OSTYPE 1 /* string: system version */ 512#define KERN_OSRELEASE 2 /* string: system release */ 513#define KERN_OSREV 3 /* int: system revision */ 514#define KERN_VERSION 4 /* string: compile time info */ 515#define KERN_MAXVNODES 5 /* int: max vnodes */ 516#define KERN_MAXPROC 6 /* int: max processes */ 517#define KERN_MAXFILES 7 /* int: max open files */ 518#define KERN_ARGMAX 8 /* int: max arguments to exec */ 519#define KERN_SECURELVL 9 /* int: system security level */ 520#define KERN_HOSTNAME 10 /* string: hostname */ 521#define KERN_HOSTID 11 /* int: host identifier */ 522#define KERN_CLOCKRATE 12 /* struct: struct clockrate */ 523#define KERN_VNODE 13 /* struct: vnode structures */ 524#define KERN_PROC 14 /* struct: process entries */ 525#define KERN_FILE 15 /* struct: file entries */ 526#define KERN_PROF 16 /* node: kernel profiling info */ 527#define KERN_POSIX1 17 /* int: POSIX.1 version */ 528#define KERN_NGROUPS 18 /* int: # of supplemental group ids */ 529#define KERN_JOB_CONTROL 19 /* int: is job control available */ 530#define KERN_SAVED_IDS 20 /* int: saved set-user/group-ID */ 531#define KERN_BOOTTIME 21 /* struct: time kernel was booted */ 532#define KERN_NISDOMAINNAME 22 /* string: YP domain name */ 533#define KERN_UPDATEINTERVAL 23 /* int: update process sleep time */ 534#define KERN_OSRELDATE 24 /* int: kernel release date */ 535#define KERN_NTP_PLL 25 /* node: NTP PLL control */ 536#define KERN_BOOTFILE 26 /* string: name of booted kernel */ 537#define KERN_MAXFILESPERPROC 27 /* int: max open files per proc */ 538#define KERN_MAXPROCPERUID 28 /* int: max processes per uid */ 539#define KERN_DUMPDEV 29 /* struct cdev *: device to dump on */ 540#define KERN_IPC 30 /* node: anything related to IPC */ 541#define KERN_DUMMY 31 /* unused */ 542#define KERN_PS_STRINGS 32 /* int: address of PS_STRINGS */ 543#define KERN_USRSTACK 33 /* int: address of USRSTACK */ 544#define KERN_LOGSIGEXIT 34 /* int: do we log sigexit procs? */ 545#define KERN_IOV_MAX 35 /* int: value of UIO_MAXIOV */ 546#define KERN_HOSTUUID 36 /* string: host UUID identifier */ 547#define KERN_ARND 37 /* int: from arc4rand() */ 548#define KERN_MAXID 38 /* number of valid kern ids */ 549 550#define CTL_KERN_NAMES { \ 551 { 0, 0 }, \ 552 { "ostype", CTLTYPE_STRING }, \ 553 { "osrelease", CTLTYPE_STRING }, \ 554 { "osrevision", CTLTYPE_INT }, \ 555 { "version", CTLTYPE_STRING }, \ 556 { "maxvnodes", CTLTYPE_INT }, \ 557 { "maxproc", CTLTYPE_INT }, \ 558 { "maxfiles", CTLTYPE_INT }, \ 559 { "argmax", CTLTYPE_INT }, \ 560 { "securelevel", CTLTYPE_INT }, \ 561 { "hostname", CTLTYPE_STRING }, \ 562 { "hostid", CTLTYPE_UINT }, \ 563 { "clockrate", CTLTYPE_STRUCT }, \ 564 { "vnode", CTLTYPE_STRUCT }, \ 565 { "proc", CTLTYPE_STRUCT }, \ 566 { "file", CTLTYPE_STRUCT }, \ 567 { "profiling", CTLTYPE_NODE }, \ 568 { "posix1version", CTLTYPE_INT }, \ 569 { "ngroups", CTLTYPE_INT }, \ 570 { "job_control", CTLTYPE_INT }, \ 571 { "saved_ids", CTLTYPE_INT }, \ 572 { "boottime", CTLTYPE_STRUCT }, \ 573 { "nisdomainname", CTLTYPE_STRING }, \ 574 { "update", CTLTYPE_INT }, \ 575 { "osreldate", CTLTYPE_INT }, \ 576 { "ntp_pll", CTLTYPE_NODE }, \ 577 { "bootfile", CTLTYPE_STRING }, \ 578 { "maxfilesperproc", CTLTYPE_INT }, \ 579 { "maxprocperuid", CTLTYPE_INT }, \ 580 { "ipc", CTLTYPE_NODE }, \ 581 { "dummy", CTLTYPE_INT }, \ 582 { "ps_strings", CTLTYPE_INT }, \ 583 { "usrstack", CTLTYPE_INT }, \ 584 { "logsigexit", CTLTYPE_INT }, \ 585 { "iov_max", CTLTYPE_INT }, \ 586 { "hostuuid", CTLTYPE_STRING }, \ 587} 588 589/* 590 * CTL_VFS identifiers 591 */ 592#define CTL_VFS_NAMES { \ 593 { "vfsconf", CTLTYPE_STRUCT }, \ 594} 595 596/* 597 * KERN_PROC subtypes 598 */ 599#define KERN_PROC_ALL 0 /* everything */ 600#define KERN_PROC_PID 1 /* by process id */ 601#define KERN_PROC_PGRP 2 /* by process group id */ 602#define KERN_PROC_SESSION 3 /* by session of pid */ 603#define KERN_PROC_TTY 4 /* by controlling tty */ 604#define KERN_PROC_UID 5 /* by effective uid */ 605#define KERN_PROC_RUID 6 /* by real uid */ 606#define KERN_PROC_ARGS 7 /* get/set arguments/proctitle */ 607#define KERN_PROC_PROC 8 /* only return procs */ 608#define KERN_PROC_SV_NAME 9 /* get syscall vector name */ 609#define KERN_PROC_RGID 10 /* by real group id */ 610#define KERN_PROC_GID 11 /* by effective group id */ 611#define KERN_PROC_PATHNAME 12 /* path to executable */ 612#define KERN_PROC_OVMMAP 13 /* Old VM map entries for process */ 613#define KERN_PROC_OFILEDESC 14 /* Old file descriptors for process */ 614#define KERN_PROC_KSTACK 15 /* Kernel stacks for process */ 615#define KERN_PROC_INC_THREAD 0x10 /* 616 * modifier for pid, pgrp, tty, 617 * uid, ruid, gid, rgid and proc 618 * This effectively uses 16-31 619 */ 620#define KERN_PROC_VMMAP 32 /* VM map entries for process */ 621#define KERN_PROC_FILEDESC 33 /* File descriptors for process */ 622 623/* 624 * KERN_IPC identifiers 625 */ 626#define KIPC_MAXSOCKBUF 1 /* int: max size of a socket buffer */ 627#define KIPC_SOCKBUF_WASTE 2 /* int: wastage factor in sockbuf */ 628#define KIPC_SOMAXCONN 3 /* int: max length of connection q */ 629#define KIPC_MAX_LINKHDR 4 /* int: max length of link header */ 630#define KIPC_MAX_PROTOHDR 5 /* int: max length of network header */ 631#define KIPC_MAX_HDR 6 /* int: max total length of headers */ 632#define KIPC_MAX_DATALEN 7 /* int: max length of data? */ 633 634/* 635 * CTL_HW identifiers 636 */ 637#define HW_MACHINE 1 /* string: machine class */ 638#define HW_MODEL 2 /* string: specific machine model */ 639#define HW_NCPU 3 /* int: number of cpus */ 640#define HW_BYTEORDER 4 /* int: machine byte order */ 641#define HW_PHYSMEM 5 /* int: total memory */ 642#define HW_USERMEM 6 /* int: non-kernel memory */ 643#define HW_PAGESIZE 7 /* int: software page size */ 644#define HW_DISKNAMES 8 /* strings: disk drive names */ 645#define HW_DISKSTATS 9 /* struct: diskstats[] */ 646#define HW_FLOATINGPT 10 /* int: has HW floating point? */ 647#define HW_MACHINE_ARCH 11 /* string: machine architecture */ 648#define HW_REALMEM 12 /* int: 'real' memory */ 649#define HW_MAXID 13 /* number of valid hw ids */ 650 651#define CTL_HW_NAMES { \ 652 { 0, 0 }, \ 653 { "machine", CTLTYPE_STRING }, \ 654 { "model", CTLTYPE_STRING }, \ 655 { "ncpu", CTLTYPE_INT }, \ 656 { "byteorder", CTLTYPE_INT }, \ 657 { "physmem", CTLTYPE_ULONG }, \ 658 { "usermem", CTLTYPE_ULONG }, \ 659 { "pagesize", CTLTYPE_INT }, \ 660 { "disknames", CTLTYPE_STRUCT }, \ 661 { "diskstats", CTLTYPE_STRUCT }, \ 662 { "floatingpoint", CTLTYPE_INT }, \ 663 { "machine_arch", CTLTYPE_STRING }, \ 664 { "realmem", CTLTYPE_ULONG }, \ 665} 666 667/* 668 * CTL_USER definitions 669 */ 670#define USER_CS_PATH 1 /* string: _CS_PATH */ 671#define USER_BC_BASE_MAX 2 /* int: BC_BASE_MAX */ 672#define USER_BC_DIM_MAX 3 /* int: BC_DIM_MAX */ 673#define USER_BC_SCALE_MAX 4 /* int: BC_SCALE_MAX */ 674#define USER_BC_STRING_MAX 5 /* int: BC_STRING_MAX */ 675#define USER_COLL_WEIGHTS_MAX 6 /* int: COLL_WEIGHTS_MAX */ 676#define USER_EXPR_NEST_MAX 7 /* int: EXPR_NEST_MAX */ 677#define USER_LINE_MAX 8 /* int: LINE_MAX */ 678#define USER_RE_DUP_MAX 9 /* int: RE_DUP_MAX */ 679#define USER_POSIX2_VERSION 10 /* int: POSIX2_VERSION */ 680#define USER_POSIX2_C_BIND 11 /* int: POSIX2_C_BIND */ 681#define USER_POSIX2_C_DEV 12 /* int: POSIX2_C_DEV */ 682#define USER_POSIX2_CHAR_TERM 13 /* int: POSIX2_CHAR_TERM */ 683#define USER_POSIX2_FORT_DEV 14 /* int: POSIX2_FORT_DEV */ 684#define USER_POSIX2_FORT_RUN 15 /* int: POSIX2_FORT_RUN */ 685#define USER_POSIX2_LOCALEDEF 16 /* int: POSIX2_LOCALEDEF */ 686#define USER_POSIX2_SW_DEV 17 /* int: POSIX2_SW_DEV */ 687#define USER_POSIX2_UPE 18 /* int: POSIX2_UPE */ 688#define USER_STREAM_MAX 19 /* int: POSIX2_STREAM_MAX */ 689#define USER_TZNAME_MAX 20 /* int: POSIX2_TZNAME_MAX */ 690#define USER_MAXID 21 /* number of valid user ids */ 691 692#define CTL_USER_NAMES { \ 693 { 0, 0 }, \ 694 { "cs_path", CTLTYPE_STRING }, \ 695 { "bc_base_max", CTLTYPE_INT }, \ 696 { "bc_dim_max", CTLTYPE_INT }, \ 697 { "bc_scale_max", CTLTYPE_INT }, \ 698 { "bc_string_max", CTLTYPE_INT }, \ 699 { "coll_weights_max", CTLTYPE_INT }, \ 700 { "expr_nest_max", CTLTYPE_INT }, \ 701 { "line_max", CTLTYPE_INT }, \ 702 { "re_dup_max", CTLTYPE_INT }, \ 703 { "posix2_version", CTLTYPE_INT }, \ 704 { "posix2_c_bind", CTLTYPE_INT }, \ 705 { "posix2_c_dev", CTLTYPE_INT }, \ 706 { "posix2_char_term", CTLTYPE_INT }, \ 707 { "posix2_fort_dev", CTLTYPE_INT }, \ 708 { "posix2_fort_run", CTLTYPE_INT }, \ 709 { "posix2_localedef", CTLTYPE_INT }, \ 710 { "posix2_sw_dev", CTLTYPE_INT }, \ 711 { "posix2_upe", CTLTYPE_INT }, \ 712 { "stream_max", CTLTYPE_INT }, \ 713 { "tzname_max", CTLTYPE_INT }, \ 714} 715 716#define CTL_P1003_1B_ASYNCHRONOUS_IO 1 /* boolean */ 717#define CTL_P1003_1B_MAPPED_FILES 2 /* boolean */ 718#define CTL_P1003_1B_MEMLOCK 3 /* boolean */ 719#define CTL_P1003_1B_MEMLOCK_RANGE 4 /* boolean */ 720#define CTL_P1003_1B_MEMORY_PROTECTION 5 /* boolean */ 721#define CTL_P1003_1B_MESSAGE_PASSING 6 /* boolean */ 722#define CTL_P1003_1B_PRIORITIZED_IO 7 /* boolean */ 723#define CTL_P1003_1B_PRIORITY_SCHEDULING 8 /* boolean */ 724#define CTL_P1003_1B_REALTIME_SIGNALS 9 /* boolean */ 725#define CTL_P1003_1B_SEMAPHORES 10 /* boolean */ 726#define CTL_P1003_1B_FSYNC 11 /* boolean */ 727#define CTL_P1003_1B_SHARED_MEMORY_OBJECTS 12 /* boolean */ 728#define CTL_P1003_1B_SYNCHRONIZED_IO 13 /* boolean */ 729#define CTL_P1003_1B_TIMERS 14 /* boolean */ 730#define CTL_P1003_1B_AIO_LISTIO_MAX 15 /* int */ 731#define CTL_P1003_1B_AIO_MAX 16 /* int */ 732#define CTL_P1003_1B_AIO_PRIO_DELTA_MAX 17 /* int */ 733#define CTL_P1003_1B_DELAYTIMER_MAX 18 /* int */ 734#define CTL_P1003_1B_MQ_OPEN_MAX 19 /* int */ 735#define CTL_P1003_1B_PAGESIZE 20 /* int */ 736#define CTL_P1003_1B_RTSIG_MAX 21 /* int */ 737#define CTL_P1003_1B_SEM_NSEMS_MAX 22 /* int */ 738#define CTL_P1003_1B_SEM_VALUE_MAX 23 /* int */ 739#define CTL_P1003_1B_SIGQUEUE_MAX 24 /* int */ 740#define CTL_P1003_1B_TIMER_MAX 25 /* int */ 741 742#define CTL_P1003_1B_MAXID 26 743 744#define CTL_P1003_1B_NAMES { \ 745 { 0, 0 }, \ 746 { "asynchronous_io", CTLTYPE_INT }, \ 747 { "mapped_files", CTLTYPE_INT }, \ 748 { "memlock", CTLTYPE_INT }, \ 749 { "memlock_range", CTLTYPE_INT }, \ 750 { "memory_protection", CTLTYPE_INT }, \ 751 { "message_passing", CTLTYPE_INT }, \ 752 { "prioritized_io", CTLTYPE_INT }, \ 753 { "priority_scheduling", CTLTYPE_INT }, \ 754 { "realtime_signals", CTLTYPE_INT }, \ 755 { "semaphores", CTLTYPE_INT }, \ 756 { "fsync", CTLTYPE_INT }, \ 757 { "shared_memory_objects", CTLTYPE_INT }, \ 758 { "synchronized_io", CTLTYPE_INT }, \ 759 { "timers", CTLTYPE_INT }, \ 760 { "aio_listio_max", CTLTYPE_INT }, \ 761 { "aio_max", CTLTYPE_INT }, \ 762 { "aio_prio_delta_max", CTLTYPE_INT }, \ 763 { "delaytimer_max", CTLTYPE_INT }, \ 764 { "mq_open_max", CTLTYPE_INT }, \ 765 { "pagesize", CTLTYPE_INT }, \ 766 { "rtsig_max", CTLTYPE_INT }, \ 767 { "nsems_max", CTLTYPE_INT }, \ 768 { "sem_value_max", CTLTYPE_INT }, \ 769 { "sigqueue_max", CTLTYPE_INT }, \ 770 { "timer_max", CTLTYPE_INT }, \ 771} 772 773#ifdef _KERNEL 774 775/* 776 * Declare some common oids. 777 */ 778extern struct sysctl_oid_list sysctl__children; 779SYSCTL_DECL(_kern); 780SYSCTL_DECL(_kern_features); 781SYSCTL_DECL(_kern_ipc); 782SYSCTL_DECL(_kern_proc); 783SYSCTL_DECL(_kern_sched); 784SYSCTL_DECL(_kern_sched_stats); 785SYSCTL_DECL(_sysctl); 786SYSCTL_DECL(_vm); 787SYSCTL_DECL(_vm_stats); 788SYSCTL_DECL(_vm_stats_misc); 789SYSCTL_DECL(_vfs); 790SYSCTL_DECL(_net); 791SYSCTL_DECL(_debug); 792SYSCTL_DECL(_debug_sizeof); 793SYSCTL_DECL(_dev); 794SYSCTL_DECL(_hw); 795SYSCTL_DECL(_hw_bus); 796SYSCTL_DECL(_hw_bus_devices); 797SYSCTL_DECL(_hw_bus_info); 798SYSCTL_DECL(_machdep); 799SYSCTL_DECL(_user); 800SYSCTL_DECL(_compat); 801SYSCTL_DECL(_regression); 802SYSCTL_DECL(_security); 803SYSCTL_DECL(_security_bsd); 804 805extern char machine[]; 806extern char osrelease[]; 807extern char ostype[]; 808extern char kern_ident[]; 809 810/* Dynamic oid handling */ 811struct sysctl_oid *sysctl_add_oid(struct sysctl_ctx_list *clist, 812 struct sysctl_oid_list *parent, int nbr, const char *name, 813 int kind, void *arg1, int arg2, 814 int (*handler) (SYSCTL_HANDLER_ARGS), 815 const char *fmt, const char *descr); 816void sysctl_rename_oid(struct sysctl_oid *oidp, const char *name); 817int sysctl_move_oid(struct sysctl_oid *oidp, 818 struct sysctl_oid_list *parent); 819int sysctl_remove_oid(struct sysctl_oid *oidp, int del, int recurse); 820int sysctl_ctx_init(struct sysctl_ctx_list *clist); 821int sysctl_ctx_free(struct sysctl_ctx_list *clist); 822struct sysctl_ctx_entry *sysctl_ctx_entry_add(struct sysctl_ctx_list *clist, 823 struct sysctl_oid *oidp); 824struct sysctl_ctx_entry *sysctl_ctx_entry_find(struct sysctl_ctx_list *clist, 825 struct sysctl_oid *oidp); 826int sysctl_ctx_entry_del(struct sysctl_ctx_list *clist, 827 struct sysctl_oid *oidp); 828 829int kernel_sysctl(struct thread *td, int *name, u_int namelen, void *old, 830 size_t *oldlenp, void *new, size_t newlen, 831 size_t *retval, int flags); 832int kernel_sysctlbyname(struct thread *td, char *name, 833 void *old, size_t *oldlenp, void *new, size_t newlen, 834 size_t *retval, int flags); 835int userland_sysctl(struct thread *td, int *name, u_int namelen, void *old, 836 size_t *oldlenp, int inkernel, void *new, size_t newlen, 837 size_t *retval, int flags); 838int sysctl_find_oid(int *name, u_int namelen, struct sysctl_oid **noid, 839 int *nindx, struct sysctl_req *req); 840void sysctl_lock(void); 841void sysctl_unlock(void); 842int sysctl_wire_old_buffer(struct sysctl_req *req, size_t len); 843 844#else /* !_KERNEL */ 845#include <sys/cdefs.h> 846 847__BEGIN_DECLS 848int sysctl(int *, u_int, void *, size_t *, void *, size_t); 849int sysctlbyname(const char *, void *, size_t *, void *, size_t); 850int sysctlnametomib(const char *, int *, size_t *); 851__END_DECLS 852#endif /* _KERNEL */ 853 854#endif /* !_SYS_SYSCTL_H_ */ 855