Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/sys/sysctl.h
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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: releng/10.0/sys/sys/sysctl.h 258885 2013-12-03 19:40:32Z kib $ 34 */ 35 36 #ifndef _SYS_SYSCTL_H_ 37 #define _SYS_SYSCTL_H_ 38 39 #include <sys/queue.h> 40 41 struct 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 */ 60 struct 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_RDTUN (CTLFLAG_RD|CTLFLAG_TUN) 88 #define CTLFLAG_RWTUN (CTLFLAG_RW|CTLFLAG_TUN) 89 #define CTLFLAG_MPSAFE 0x00040000 /* Handler is MP safe */ 90 #define CTLFLAG_VNET 0x00020000 /* Prisons with vnet can fiddle */ 91 #define CTLFLAG_DYING 0x00010000 /* Oid is being removed */ 92 #define CTLFLAG_CAPRD 0x00008000 /* Can be read in capability mode */ 93 #define CTLFLAG_CAPWR 0x00004000 /* Can be written in capability mode */ 94 #define CTLFLAG_STATS 0x00002000 /* Statistics, not a tuneable */ 95 #define CTLFLAG_CAPRW (CTLFLAG_CAPRD|CTLFLAG_CAPWR) 96 97 /* 98 * Secure level. Note that CTLFLAG_SECURE == CTLFLAG_SECURE1. 99 * 100 * Secure when the securelevel is raised to at least N. 101 */ 102 #define CTLSHIFT_SECURE 20 103 #define CTLFLAG_SECURE1 (CTLFLAG_SECURE | (0 << CTLSHIFT_SECURE)) 104 #define CTLFLAG_SECURE2 (CTLFLAG_SECURE | (1 << CTLSHIFT_SECURE)) 105 #define CTLFLAG_SECURE3 (CTLFLAG_SECURE | (2 << CTLSHIFT_SECURE)) 106 107 /* 108 * USE THIS instead of a hardwired number from the categories below 109 * to get dynamically assigned sysctl entries using the linker-set 110 * technology. This is the way nearly all new sysctl variables should 111 * be implemented. 112 * e.g. SYSCTL_INT(_parent, OID_AUTO, name, CTLFLAG_RW, &variable, 0, ""); 113 */ 114 #define OID_AUTO (-1) 115 116 /* 117 * The starting number for dynamically-assigned entries. WARNING! 118 * ALL static sysctl entries should have numbers LESS than this! 119 */ 120 #define CTL_AUTO_START 0x100 121 122 #ifdef _KERNEL 123 #include <sys/linker_set.h> 124 125 #define SYSCTL_HANDLER_ARGS struct sysctl_oid *oidp, void *arg1, \ 126 intptr_t arg2, struct sysctl_req *req 127 128 /* definitions for sysctl_req 'lock' member */ 129 #define REQ_UNWIRED 1 130 #define REQ_WIRED 2 131 132 /* definitions for sysctl_req 'flags' member */ 133 #if defined(__amd64__) || defined(__ia64__) || defined(__powerpc64__) ||\ 134 (defined(__mips__) && defined(__mips_n64)) 135 #define SCTL_MASK32 1 /* 32 bit emulation */ 136 #endif 137 138 /* 139 * This describes the access space for a sysctl request. This is needed 140 * so that we can use the interface from the kernel or from user-space. 141 */ 142 struct sysctl_req { 143 struct thread *td; /* used for access checking */ 144 int lock; /* wiring state */ 145 void *oldptr; 146 size_t oldlen; 147 size_t oldidx; 148 int (*oldfunc)(struct sysctl_req *, const void *, size_t); 149 void *newptr; 150 size_t newlen; 151 size_t newidx; 152 int (*newfunc)(struct sysctl_req *, void *, size_t); 153 size_t validlen; 154 int flags; 155 }; 156 157 SLIST_HEAD(sysctl_oid_list, sysctl_oid); 158 159 /* 160 * This describes one "oid" in the MIB tree. Potentially more nodes can 161 * be hidden behind it, expanded by the handler. 162 */ 163 struct sysctl_oid { 164 struct sysctl_oid_list *oid_parent; 165 SLIST_ENTRY(sysctl_oid) oid_link; 166 int oid_number; 167 u_int oid_kind; 168 void *oid_arg1; 169 intptr_t oid_arg2; 170 const char *oid_name; 171 int (*oid_handler)(SYSCTL_HANDLER_ARGS); 172 const char *oid_fmt; 173 int oid_refcnt; 174 u_int oid_running; 175 const char *oid_descr; 176 }; 177 178 #define SYSCTL_IN(r, p, l) (r->newfunc)(r, p, l) 179 #define SYSCTL_OUT(r, p, l) (r->oldfunc)(r, p, l) 180 181 int sysctl_handle_int(SYSCTL_HANDLER_ARGS); 182 int sysctl_msec_to_ticks(SYSCTL_HANDLER_ARGS); 183 int sysctl_handle_long(SYSCTL_HANDLER_ARGS); 184 int sysctl_handle_64(SYSCTL_HANDLER_ARGS); 185 int sysctl_handle_string(SYSCTL_HANDLER_ARGS); 186 int sysctl_handle_opaque(SYSCTL_HANDLER_ARGS); 187 int sysctl_handle_counter_u64(SYSCTL_HANDLER_ARGS); 188 189 int sysctl_dpcpu_int(SYSCTL_HANDLER_ARGS); 190 int sysctl_dpcpu_long(SYSCTL_HANDLER_ARGS); 191 int sysctl_dpcpu_quad(SYSCTL_HANDLER_ARGS); 192 193 /* 194 * These functions are used to add/remove an oid from the mib. 195 */ 196 void sysctl_register_oid(struct sysctl_oid *oidp); 197 void sysctl_unregister_oid(struct sysctl_oid *oidp); 198 199 /* Declare a static oid to allow child oids to be added to it. */ 200 #define SYSCTL_DECL(name) \ 201 extern struct sysctl_oid_list sysctl_##name##_children 202 203 /* Hide these in macros. */ 204 #define SYSCTL_CHILDREN(oid_ptr) \ 205 (struct sysctl_oid_list *)(oid_ptr)->oid_arg1 206 #define SYSCTL_CHILDREN_SET(oid_ptr, val) (oid_ptr)->oid_arg1 = (val) 207 #define SYSCTL_STATIC_CHILDREN(oid_name) (&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. */ 212 struct sysctl_ctx_entry { 213 struct sysctl_oid *entry; 214 TAILQ_ENTRY(sysctl_ctx_entry) link; 215 }; 216 217 TAILQ_HEAD(sysctl_ctx_list, sysctl_ctx_entry); 218 219 #define SYSCTL_NODE_CHILDREN(parent, name) \ 220 sysctl_##parent##_##name##_children 221 222 /* 223 * These macros provide type safety for sysctls. SYSCTL_ALLOWED_TYPES() 224 * defines a transparent union of the allowed types. SYSCTL_ASSERT_TYPE() 225 * and SYSCTL_ADD_ASSERT_TYPE() use the transparent union to assert that 226 * the pointer matches the allowed types. 227 * 228 * The allow_0 member allows a literal 0 to be passed for ptr. 229 */ 230 #define SYSCTL_ALLOWED_TYPES(type, decls) \ 231 union sysctl_##type { \ 232 long allow_0; \ 233 decls \ 234 } __attribute__((__transparent_union__)); \ 235 \ 236 static inline void * \ 237 __sysctl_assert_##type(union sysctl_##type ptr) \ 238 { \ 239 return (ptr.a); \ 240 } \ 241 struct __hack 242 243 SYSCTL_ALLOWED_TYPES(INT, int *a; ); 244 SYSCTL_ALLOWED_TYPES(UINT, unsigned int *a; ); 245 SYSCTL_ALLOWED_TYPES(LONG, long *a; ); 246 SYSCTL_ALLOWED_TYPES(ULONG, unsigned long *a; ); 247 SYSCTL_ALLOWED_TYPES(INT64, int64_t *a; long long *b; ); 248 SYSCTL_ALLOWED_TYPES(UINT64, uint64_t *a; unsigned long long *b; ); 249 250 #ifdef notyet 251 #define SYSCTL_ADD_ASSERT_TYPE(type, ptr) \ 252 __sysctl_assert_ ## type (ptr) 253 #define SYSCTL_ASSERT_TYPE(type, ptr, parent, name) \ 254 _SYSCTL_ASSERT_TYPE(type, ptr, __LINE__, parent##_##name) 255 #else 256 #define SYSCTL_ADD_ASSERT_TYPE(type, ptr) ptr 257 #define SYSCTL_ASSERT_TYPE(type, ptr, parent, name) 258 #endif 259 #define _SYSCTL_ASSERT_TYPE(t, p, l, id) \ 260 __SYSCTL_ASSERT_TYPE(t, p, l, id) 261 #define __SYSCTL_ASSERT_TYPE(type, ptr, line, id) \ 262 static inline void \ 263 sysctl_assert_##line##_##id(void) \ 264 { \ 265 (void)__sysctl_assert_##type(ptr); \ 266 } \ 267 struct __hack 268 269 #ifndef NO_SYSCTL_DESCR 270 #define __DESCR(d) d 271 #else 272 #define __DESCR(d) "" 273 #endif 274 275 /* This constructs a "raw" MIB oid. */ 276 #define SYSCTL_OID(parent, nbr, name, kind, a1, a2, handler, fmt, descr)\ 277 static struct sysctl_oid sysctl__##parent##_##name = { \ 278 &sysctl_##parent##_children, \ 279 { NULL }, \ 280 nbr, \ 281 kind, \ 282 a1, \ 283 a2, \ 284 #name, \ 285 handler, \ 286 fmt, \ 287 0, \ 288 0, \ 289 __DESCR(descr) \ 290 }; \ 291 DATA_SET(sysctl_set, sysctl__##parent##_##name) 292 293 #define SYSCTL_ADD_OID(ctx, parent, nbr, name, kind, a1, a2, handler, fmt, descr) \ 294 sysctl_add_oid(ctx, parent, nbr, name, kind, a1, a2, handler, fmt, __DESCR(descr)) 295 296 /* This constructs a node from which other oids can hang. */ 297 #define SYSCTL_NODE(parent, nbr, name, access, handler, descr) \ 298 struct sysctl_oid_list SYSCTL_NODE_CHILDREN(parent, name); \ 299 SYSCTL_OID(parent, nbr, name, CTLTYPE_NODE|(access), \ 300 (void*)&SYSCTL_NODE_CHILDREN(parent, name), 0, handler, "N", descr) 301 302 #define SYSCTL_ADD_NODE(ctx, parent, nbr, name, access, handler, descr) \ 303 sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_NODE|(access), \ 304 NULL, 0, handler, "N", __DESCR(descr)) 305 306 /* Oid for a string. len can be 0 to indicate '\0' termination. */ 307 #define SYSCTL_STRING(parent, nbr, name, access, arg, len, descr) \ 308 SYSCTL_OID(parent, nbr, name, CTLTYPE_STRING|(access), \ 309 arg, len, sysctl_handle_string, "A", descr) 310 311 #define SYSCTL_ADD_STRING(ctx, parent, nbr, name, access, arg, len, descr) \ 312 sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_STRING|(access), \ 313 arg, len, sysctl_handle_string, "A", __DESCR(descr)) 314 315 /* Oid for an int. If ptr is NULL, val is returned. */ 316 #define SYSCTL_INT(parent, nbr, name, access, ptr, val, descr) \ 317 SYSCTL_ASSERT_TYPE(INT, ptr, parent, name); \ 318 SYSCTL_OID(parent, nbr, name, \ 319 CTLTYPE_INT | CTLFLAG_MPSAFE | (access), \ 320 ptr, val, sysctl_handle_int, "I", descr) 321 322 #define SYSCTL_ADD_INT(ctx, parent, nbr, name, access, ptr, val, descr) \ 323 sysctl_add_oid(ctx, parent, nbr, name, \ 324 CTLTYPE_INT | CTLFLAG_MPSAFE | (access), \ 325 SYSCTL_ADD_ASSERT_TYPE(INT, ptr), val, \ 326 sysctl_handle_int, "I", __DESCR(descr)) 327 328 /* Oid for an unsigned int. If ptr is NULL, val is returned. */ 329 #define SYSCTL_UINT(parent, nbr, name, access, ptr, val, descr) \ 330 SYSCTL_ASSERT_TYPE(UINT, ptr, parent, name); \ 331 SYSCTL_OID(parent, nbr, name, \ 332 CTLTYPE_UINT | CTLFLAG_MPSAFE | (access), \ 333 ptr, val, sysctl_handle_int, "IU", descr) 334 335 #define SYSCTL_ADD_UINT(ctx, parent, nbr, name, access, ptr, val, descr) \ 336 sysctl_add_oid(ctx, parent, nbr, name, \ 337 CTLTYPE_UINT | CTLFLAG_MPSAFE | (access), \ 338 SYSCTL_ADD_ASSERT_TYPE(UINT, ptr), val, \ 339 sysctl_handle_int, "IU", __DESCR(descr)) 340 341 /* Oid for a long. The pointer must be non NULL. */ 342 #define SYSCTL_LONG(parent, nbr, name, access, ptr, val, descr) \ 343 SYSCTL_ASSERT_TYPE(LONG, ptr, parent, name); \ 344 SYSCTL_OID(parent, nbr, name, \ 345 CTLTYPE_LONG | CTLFLAG_MPSAFE | (access), \ 346 ptr, val, sysctl_handle_long, "L", descr) 347 348 #define SYSCTL_ADD_LONG(ctx, parent, nbr, name, access, ptr, descr) \ 349 sysctl_add_oid(ctx, parent, nbr, name, \ 350 CTLTYPE_LONG | CTLFLAG_MPSAFE | (access), \ 351 SYSCTL_ADD_ASSERT_TYPE(LONG, ptr), 0, \ 352 sysctl_handle_long, "L", __DESCR(descr)) 353 354 /* Oid for an unsigned long. The pointer must be non NULL. */ 355 #define SYSCTL_ULONG(parent, nbr, name, access, ptr, val, descr) \ 356 SYSCTL_ASSERT_TYPE(ULONG, ptr, parent, name); \ 357 SYSCTL_OID(parent, nbr, name, \ 358 CTLTYPE_ULONG | CTLFLAG_MPSAFE | (access), \ 359 ptr, val, sysctl_handle_long, "LU", descr) 360 361 #define SYSCTL_ADD_ULONG(ctx, parent, nbr, name, access, ptr, descr) \ 362 sysctl_add_oid(ctx, parent, nbr, name, \ 363 CTLTYPE_ULONG | CTLFLAG_MPSAFE | (access), \ 364 SYSCTL_ADD_ASSERT_TYPE(ULONG, ptr), 0, \ 365 sysctl_handle_long, "LU", __DESCR(descr)) 366 367 /* Oid for a quad. The pointer must be non NULL. */ 368 #define SYSCTL_QUAD(parent, nbr, name, access, ptr, val, descr) \ 369 SYSCTL_ASSERT_TYPE(INT64, ptr, parent, name); \ 370 SYSCTL_OID(parent, nbr, name, \ 371 CTLTYPE_S64 | CTLFLAG_MPSAFE | (access), \ 372 ptr, val, sysctl_handle_64, "Q", descr) 373 374 #define SYSCTL_ADD_QUAD(ctx, parent, nbr, name, access, ptr, descr) \ 375 sysctl_add_oid(ctx, parent, nbr, name, \ 376 CTLTYPE_S64 | CTLFLAG_MPSAFE | (access), \ 377 SYSCTL_ADD_ASSERT_TYPE(INT64, ptr), 0, \ 378 sysctl_handle_64, "Q", __DESCR(descr)) 379 380 #define SYSCTL_UQUAD(parent, nbr, name, access, ptr, val, descr) \ 381 SYSCTL_ASSERT_TYPE(UINT64, ptr, parent, name); \ 382 SYSCTL_OID(parent, nbr, name, \ 383 CTLTYPE_U64 | CTLFLAG_MPSAFE | (access), \ 384 ptr, val, sysctl_handle_64, "QU", descr) 385 386 #define SYSCTL_ADD_UQUAD(ctx, parent, nbr, name, access, ptr, descr) \ 387 sysctl_add_oid(ctx, parent, nbr, name, \ 388 CTLTYPE_U64 | CTLFLAG_MPSAFE | (access), \ 389 SYSCTL_ADD_ASSERT_TYPE(UINT64, ptr), 0, \ 390 sysctl_handle_64, "QU", __DESCR(descr)) 391 392 /* Oid for a 64-bit unsigned counter(9). The pointer must be non NULL. */ 393 #define SYSCTL_COUNTER_U64(parent, nbr, name, access, ptr, val, descr) \ 394 SYSCTL_ASSERT_TYPE(UINT64, ptr, parent, name); \ 395 SYSCTL_OID(parent, nbr, name, \ 396 CTLTYPE_U64 | CTLFLAG_MPSAFE | (access), \ 397 ptr, val, sysctl_handle_counter_u64, "QU", descr) 398 399 #define SYSCTL_ADD_COUNTER_U64(ctx, parent, nbr, name, access, ptr, descr)\ 400 sysctl_add_oid(ctx, parent, nbr, name, \ 401 CTLTYPE_U64 | CTLFLAG_MPSAFE | (access), \ 402 SYSCTL_ADD_ASSERT_TYPE(UINT64, ptr), 0, \ 403 sysctl_handle_counter_u64, "QU", __DESCR(descr)) 404 405 /* Oid for an opaque object. Specified by a pointer and a length. */ 406 #define SYSCTL_OPAQUE(parent, nbr, name, access, ptr, len, fmt, descr) \ 407 SYSCTL_OID(parent, nbr, name, CTLTYPE_OPAQUE|(access), \ 408 ptr, len, sysctl_handle_opaque, fmt, descr) 409 410 #define SYSCTL_ADD_OPAQUE(ctx, parent, nbr, name, access, ptr, len, fmt, descr)\ 411 sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_OPAQUE|(access), \ 412 ptr, len, sysctl_handle_opaque, fmt, __DESCR(descr)) 413 414 /* Oid for a struct. Specified by a pointer and a type. */ 415 #define SYSCTL_STRUCT(parent, nbr, name, access, ptr, type, descr) \ 416 SYSCTL_OID(parent, nbr, name, CTLTYPE_OPAQUE|(access), \ 417 ptr, sizeof(struct type), sysctl_handle_opaque, \ 418 "S," #type, descr) 419 420 #define SYSCTL_ADD_STRUCT(ctx, parent, nbr, name, access, ptr, type, descr) \ 421 sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_OPAQUE|(access), \ 422 ptr, sizeof(struct type), sysctl_handle_opaque, "S," #type, __DESCR(descr)) 423 424 /* Oid for a procedure. Specified by a pointer and an arg. */ 425 #define SYSCTL_PROC(parent, nbr, name, access, ptr, arg, handler, fmt, descr) \ 426 CTASSERT(((access) & CTLTYPE) != 0); \ 427 SYSCTL_OID(parent, nbr, name, (access), \ 428 ptr, arg, handler, fmt, descr) 429 430 #define SYSCTL_ADD_PROC(ctx, parent, nbr, name, access, ptr, arg, handler, fmt, descr) \ 431 sysctl_add_oid(ctx, parent, nbr, name, (access), \ 432 ptr, arg, handler, fmt, __DESCR(descr)) 433 434 /* 435 * A macro to generate a read-only sysctl to indicate the presense of optional 436 * kernel features. 437 */ 438 #define FEATURE(name, desc) \ 439 SYSCTL_INT(_kern_features, OID_AUTO, name, CTLFLAG_RD | CTLFLAG_CAPRD, \ 440 NULL, 1, desc) 441 442 #endif /* _KERNEL */ 443 444 /* 445 * Top-level identifiers 446 */ 447 #define CTL_UNSPEC 0 /* unused */ 448 #define CTL_KERN 1 /* "high kernel": proc, limits */ 449 #define CTL_VM 2 /* virtual memory */ 450 #define CTL_VFS 3 /* filesystem, mount type is next */ 451 #define CTL_NET 4 /* network, see socket.h */ 452 #define CTL_DEBUG 5 /* debugging parameters */ 453 #define CTL_HW 6 /* generic cpu/io */ 454 #define CTL_MACHDEP 7 /* machine dependent */ 455 #define CTL_USER 8 /* user-level */ 456 #define CTL_P1003_1B 9 /* POSIX 1003.1B */ 457 #define CTL_MAXID 10 /* number of valid top-level ids */ 458 459 /* 460 * CTL_KERN identifiers 461 */ 462 #define KERN_OSTYPE 1 /* string: system version */ 463 #define KERN_OSRELEASE 2 /* string: system release */ 464 #define KERN_OSREV 3 /* int: system revision */ 465 #define KERN_VERSION 4 /* string: compile time info */ 466 #define KERN_MAXVNODES 5 /* int: max vnodes */ 467 #define KERN_MAXPROC 6 /* int: max processes */ 468 #define KERN_MAXFILES 7 /* int: max open files */ 469 #define KERN_ARGMAX 8 /* int: max arguments to exec */ 470 #define KERN_SECURELVL 9 /* int: system security level */ 471 #define KERN_HOSTNAME 10 /* string: hostname */ 472 #define KERN_HOSTID 11 /* int: host identifier */ 473 #define KERN_CLOCKRATE 12 /* struct: struct clockrate */ 474 #define KERN_VNODE 13 /* struct: vnode structures */ 475 #define KERN_PROC 14 /* struct: process entries */ 476 #define KERN_FILE 15 /* struct: file entries */ 477 #define KERN_PROF 16 /* node: kernel profiling info */ 478 #define KERN_POSIX1 17 /* int: POSIX.1 version */ 479 #define KERN_NGROUPS 18 /* int: # of supplemental group ids */ 480 #define KERN_JOB_CONTROL 19 /* int: is job control available */ 481 #define KERN_SAVED_IDS 20 /* int: saved set-user/group-ID */ 482 #define KERN_BOOTTIME 21 /* struct: time kernel was booted */ 483 #define KERN_NISDOMAINNAME 22 /* string: YP domain name */ 484 #define KERN_UPDATEINTERVAL 23 /* int: update process sleep time */ 485 #define KERN_OSRELDATE 24 /* int: kernel release date */ 486 #define KERN_NTP_PLL 25 /* node: NTP PLL control */ 487 #define KERN_BOOTFILE 26 /* string: name of booted kernel */ 488 #define KERN_MAXFILESPERPROC 27 /* int: max open files per proc */ 489 #define KERN_MAXPROCPERUID 28 /* int: max processes per uid */ 490 #define KERN_DUMPDEV 29 /* struct cdev *: device to dump on */ 491 #define KERN_IPC 30 /* node: anything related to IPC */ 492 #define KERN_DUMMY 31 /* unused */ 493 #define KERN_PS_STRINGS 32 /* int: address of PS_STRINGS */ 494 #define KERN_USRSTACK 33 /* int: address of USRSTACK */ 495 #define KERN_LOGSIGEXIT 34 /* int: do we log sigexit procs? */ 496 #define KERN_IOV_MAX 35 /* int: value of UIO_MAXIOV */ 497 #define KERN_HOSTUUID 36 /* string: host UUID identifier */ 498 #define KERN_ARND 37 /* int: from arc4rand() */ 499 #define KERN_MAXID 38 /* number of valid kern ids */ 500 /* 501 * KERN_PROC subtypes 502 */ 503 #define KERN_PROC_ALL 0 /* everything */ 504 #define KERN_PROC_PID 1 /* by process id */ 505 #define KERN_PROC_PGRP 2 /* by process group id */ 506 #define KERN_PROC_SESSION 3 /* by session of pid */ 507 #define KERN_PROC_TTY 4 /* by controlling tty */ 508 #define KERN_PROC_UID 5 /* by effective uid */ 509 #define KERN_PROC_RUID 6 /* by real uid */ 510 #define KERN_PROC_ARGS 7 /* get/set arguments/proctitle */ 511 #define KERN_PROC_PROC 8 /* only return procs */ 512 #define KERN_PROC_SV_NAME 9 /* get syscall vector name */ 513 #define KERN_PROC_RGID 10 /* by real group id */ 514 #define KERN_PROC_GID 11 /* by effective group id */ 515 #define KERN_PROC_PATHNAME 12 /* path to executable */ 516 #define KERN_PROC_OVMMAP 13 /* Old VM map entries for process */ 517 #define KERN_PROC_OFILEDESC 14 /* Old file descriptors for process */ 518 #define KERN_PROC_KSTACK 15 /* Kernel stacks for process */ 519 #define KERN_PROC_INC_THREAD 0x10 /* 520 * modifier for pid, pgrp, tty, 521 * uid, ruid, gid, rgid and proc 522 * This effectively uses 16-31 523 */ 524 #define KERN_PROC_VMMAP 32 /* VM map entries for process */ 525 #define KERN_PROC_FILEDESC 33 /* File descriptors for process */ 526 #define KERN_PROC_GROUPS 34 /* process groups */ 527 #define KERN_PROC_ENV 35 /* get environment */ 528 #define KERN_PROC_AUXV 36 /* get ELF auxiliary vector */ 529 #define KERN_PROC_RLIMIT 37 /* process resource limits */ 530 #define KERN_PROC_PS_STRINGS 38 /* get ps_strings location */ 531 #define KERN_PROC_UMASK 39 /* process umask */ 532 #define KERN_PROC_OSREL 40 /* osreldate for process binary */ 533 #define KERN_PROC_SIGTRAMP 41 /* signal trampoline location */ 534 535 /* 536 * KERN_IPC identifiers 537 */ 538 #define KIPC_MAXSOCKBUF 1 /* int: max size of a socket buffer */ 539 #define KIPC_SOCKBUF_WASTE 2 /* int: wastage factor in sockbuf */ 540 #define KIPC_SOMAXCONN 3 /* int: max length of connection q */ 541 #define KIPC_MAX_LINKHDR 4 /* int: max length of link header */ 542 #define KIPC_MAX_PROTOHDR 5 /* int: max length of network header */ 543 #define KIPC_MAX_HDR 6 /* int: max total length of headers */ 544 #define KIPC_MAX_DATALEN 7 /* int: max length of data? */ 545 546 /* 547 * CTL_HW identifiers 548 */ 549 #define HW_MACHINE 1 /* string: machine class */ 550 #define HW_MODEL 2 /* string: specific machine model */ 551 #define HW_NCPU 3 /* int: number of cpus */ 552 #define HW_BYTEORDER 4 /* int: machine byte order */ 553 #define HW_PHYSMEM 5 /* int: total memory */ 554 #define HW_USERMEM 6 /* int: non-kernel memory */ 555 #define HW_PAGESIZE 7 /* int: software page size */ 556 #define HW_DISKNAMES 8 /* strings: disk drive names */ 557 #define HW_DISKSTATS 9 /* struct: diskstats[] */ 558 #define HW_FLOATINGPT 10 /* int: has HW floating point? */ 559 #define HW_MACHINE_ARCH 11 /* string: machine architecture */ 560 #define HW_REALMEM 12 /* int: 'real' memory */ 561 #define HW_MAXID 13 /* number of valid hw ids */ 562 563 /* 564 * CTL_USER definitions 565 */ 566 #define USER_CS_PATH 1 /* string: _CS_PATH */ 567 #define USER_BC_BASE_MAX 2 /* int: BC_BASE_MAX */ 568 #define USER_BC_DIM_MAX 3 /* int: BC_DIM_MAX */ 569 #define USER_BC_SCALE_MAX 4 /* int: BC_SCALE_MAX */ 570 #define USER_BC_STRING_MAX 5 /* int: BC_STRING_MAX */ 571 #define USER_COLL_WEIGHTS_MAX 6 /* int: COLL_WEIGHTS_MAX */ 572 #define USER_EXPR_NEST_MAX 7 /* int: EXPR_NEST_MAX */ 573 #define USER_LINE_MAX 8 /* int: LINE_MAX */ 574 #define USER_RE_DUP_MAX 9 /* int: RE_DUP_MAX */ 575 #define USER_POSIX2_VERSION 10 /* int: POSIX2_VERSION */ 576 #define USER_POSIX2_C_BIND 11 /* int: POSIX2_C_BIND */ 577 #define USER_POSIX2_C_DEV 12 /* int: POSIX2_C_DEV */ 578 #define USER_POSIX2_CHAR_TERM 13 /* int: POSIX2_CHAR_TERM */ 579 #define USER_POSIX2_FORT_DEV 14 /* int: POSIX2_FORT_DEV */ 580 #define USER_POSIX2_FORT_RUN 15 /* int: POSIX2_FORT_RUN */ 581 #define USER_POSIX2_LOCALEDEF 16 /* int: POSIX2_LOCALEDEF */ 582 #define USER_POSIX2_SW_DEV 17 /* int: POSIX2_SW_DEV */ 583 #define USER_POSIX2_UPE 18 /* int: POSIX2_UPE */ 584 #define USER_STREAM_MAX 19 /* int: POSIX2_STREAM_MAX */ 585 #define USER_TZNAME_MAX 20 /* int: POSIX2_TZNAME_MAX */ 586 #define USER_MAXID 21 /* number of valid user ids */ 587 588 #define CTL_P1003_1B_ASYNCHRONOUS_IO 1 /* boolean */ 589 #define CTL_P1003_1B_MAPPED_FILES 2 /* boolean */ 590 #define CTL_P1003_1B_MEMLOCK 3 /* boolean */ 591 #define CTL_P1003_1B_MEMLOCK_RANGE 4 /* boolean */ 592 #define CTL_P1003_1B_MEMORY_PROTECTION 5 /* boolean */ 593 #define CTL_P1003_1B_MESSAGE_PASSING 6 /* boolean */ 594 #define CTL_P1003_1B_PRIORITIZED_IO 7 /* boolean */ 595 #define CTL_P1003_1B_PRIORITY_SCHEDULING 8 /* boolean */ 596 #define CTL_P1003_1B_REALTIME_SIGNALS 9 /* boolean */ 597 #define CTL_P1003_1B_SEMAPHORES 10 /* boolean */ 598 #define CTL_P1003_1B_FSYNC 11 /* boolean */ 599 #define CTL_P1003_1B_SHARED_MEMORY_OBJECTS 12 /* boolean */ 600 #define CTL_P1003_1B_SYNCHRONIZED_IO 13 /* boolean */ 601 #define CTL_P1003_1B_TIMERS 14 /* boolean */ 602 #define CTL_P1003_1B_AIO_LISTIO_MAX 15 /* int */ 603 #define CTL_P1003_1B_AIO_MAX 16 /* int */ 604 #define CTL_P1003_1B_AIO_PRIO_DELTA_MAX 17 /* int */ 605 #define CTL_P1003_1B_DELAYTIMER_MAX 18 /* int */ 606 #define CTL_P1003_1B_MQ_OPEN_MAX 19 /* int */ 607 #define CTL_P1003_1B_PAGESIZE 20 /* int */ 608 #define CTL_P1003_1B_RTSIG_MAX 21 /* int */ 609 #define CTL_P1003_1B_SEM_NSEMS_MAX 22 /* int */ 610 #define CTL_P1003_1B_SEM_VALUE_MAX 23 /* int */ 611 #define CTL_P1003_1B_SIGQUEUE_MAX 24 /* int */ 612 #define CTL_P1003_1B_TIMER_MAX 25 /* int */ 613 614 #define CTL_P1003_1B_MAXID 26 615 616 #ifdef _KERNEL 617 618 /* 619 * Declare some common oids. 620 */ 621 extern struct sysctl_oid_list sysctl__children; 622 SYSCTL_DECL(_kern); 623 SYSCTL_DECL(_kern_features); 624 SYSCTL_DECL(_kern_ipc); 625 SYSCTL_DECL(_kern_proc); 626 SYSCTL_DECL(_kern_sched); 627 SYSCTL_DECL(_kern_sched_stats); 628 SYSCTL_DECL(_sysctl); 629 SYSCTL_DECL(_vm); 630 SYSCTL_DECL(_vm_stats); 631 SYSCTL_DECL(_vm_stats_misc); 632 SYSCTL_DECL(_vfs); 633 SYSCTL_DECL(_net); 634 SYSCTL_DECL(_debug); 635 SYSCTL_DECL(_debug_sizeof); 636 SYSCTL_DECL(_dev); 637 SYSCTL_DECL(_hw); 638 SYSCTL_DECL(_hw_bus); 639 SYSCTL_DECL(_hw_bus_devices); 640 SYSCTL_DECL(_hw_bus_info); 641 SYSCTL_DECL(_machdep); 642 SYSCTL_DECL(_user); 643 SYSCTL_DECL(_compat); 644 SYSCTL_DECL(_regression); 645 SYSCTL_DECL(_security); 646 SYSCTL_DECL(_security_bsd); 647 648 extern char machine[]; 649 extern char osrelease[]; 650 extern char ostype[]; 651 extern char kern_ident[]; 652 653 /* Dynamic oid handling */ 654 struct sysctl_oid *sysctl_add_oid(struct sysctl_ctx_list *clist, 655 struct sysctl_oid_list *parent, int nbr, const char *name, int kind, 656 void *arg1, intptr_t arg2, int (*handler)(SYSCTL_HANDLER_ARGS), 657 const char *fmt, const char *descr); 658 int sysctl_remove_name(struct sysctl_oid *parent, const char *name, int del, 659 int recurse); 660 void sysctl_rename_oid(struct sysctl_oid *oidp, const char *name); 661 int sysctl_move_oid(struct sysctl_oid *oidp, 662 struct sysctl_oid_list *parent); 663 int sysctl_remove_oid(struct sysctl_oid *oidp, int del, int recurse); 664 int sysctl_ctx_init(struct sysctl_ctx_list *clist); 665 int sysctl_ctx_free(struct sysctl_ctx_list *clist); 666 struct sysctl_ctx_entry *sysctl_ctx_entry_add(struct sysctl_ctx_list *clist, 667 struct sysctl_oid *oidp); 668 struct sysctl_ctx_entry *sysctl_ctx_entry_find(struct sysctl_ctx_list *clist, 669 struct sysctl_oid *oidp); 670 int sysctl_ctx_entry_del(struct sysctl_ctx_list *clist, 671 struct sysctl_oid *oidp); 672 673 int kernel_sysctl(struct thread *td, int *name, u_int namelen, void *old, 674 size_t *oldlenp, void *new, size_t newlen, size_t *retval, 675 int flags); 676 int kernel_sysctlbyname(struct thread *td, char *name, void *old, 677 size_t *oldlenp, void *new, size_t newlen, size_t *retval, 678 int flags); 679 int userland_sysctl(struct thread *td, int *name, u_int namelen, void *old, 680 size_t *oldlenp, int inkernel, void *new, size_t newlen, 681 size_t *retval, int flags); 682 int sysctl_find_oid(int *name, u_int namelen, struct sysctl_oid **noid, 683 int *nindx, struct sysctl_req *req); 684 void sysctl_lock(void); 685 void sysctl_unlock(void); 686 int sysctl_wire_old_buffer(struct sysctl_req *req, size_t len); 687 688 struct sbuf; 689 struct sbuf *sbuf_new_for_sysctl(struct sbuf *, char *, int, 690 struct sysctl_req *); 691 #else /* !_KERNEL */ 692 #include <sys/cdefs.h> 693 694 __BEGIN_DECLS 695 int sysctl(const int *, u_int, void *, size_t *, const void *, size_t); 696 int sysctlbyname(const char *, void *, size_t *, const void *, size_t); 697 int sysctlnametomib(const char *, int *, size_t *); 698 __END_DECLS 699 #endif /* _KERNEL */ 700 701 #endif /* !_SYS_SYSCTL_H_ */
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