sys/sys/sysctl.h

   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  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by the University of
  19  *      California, Berkeley and its contributors.
  20  * 4. Neither the name of the University nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  *
  36  *      @(#)sysctl.h    8.1 (Berkeley) 6/2/93
  37  * $FreeBSD: src/sys/sys/sysctl.h,v 1.81.2.10 2003/05/01 22:48:09 trhodes Exp $
  38  * $DragonFly: src/sys/sys/sysctl.h,v 1.16 2005/08/07 03:17:37 hmp Exp $
  39  */
  40
  41 #ifndef _SYS_SYSCTL_H_
  42 #define _SYS_SYSCTL_H_
  43
  44 #include <sys/_posix.h>
  45 #include <sys/queue.h>
  46
  47 /*
  48  * Definitions for sysctl call.  The sysctl call uses a hierarchical name
  49  * for objects that can be examined or modified.  The name is expressed as
  50  * a sequence of integers.  Like a file path name, the meaning of each
  51  * component depends on its place in the hierarchy.  The top-level and kern
  52  * identifiers are defined here, and other identifiers are defined in the
  53  * respective subsystem header files.
  54  */
  55
  56 #define CTL_MAXNAME     12      /* largest number of components supported */
  57
  58 /*
  59  * Each subsystem defined by sysctl defines a list of variables
  60  * for that subsystem. Each name is either a node with further
  61  * levels defined below it, or it is a leaf of some particular
  62  * type given below. Each sysctl level defines a set of name/type
  63  * pairs to be used by sysctl(1) in manipulating the subsystem.
  64  */
  65 struct ctlname {
  66         char    *ctl_name;      /* subsystem name */
  67         int     ctl_type;       /* type of name */
  68 };
  69
  70 #define CTLTYPE         0xf     /* Mask for the type */
  71 #define CTLTYPE_NODE    1       /* name is a node */
  72 #define CTLTYPE_INT     2       /* name describes an integer */
  73 #define CTLTYPE_STRING  3       /* name describes a string */
  74 #define CTLTYPE_QUAD    4       /* name describes a 64-bit number */
  75 #define CTLTYPE_OPAQUE  5       /* name describes a structure */
  76 #define CTLTYPE_STRUCT  CTLTYPE_OPAQUE  /* name describes a structure */
  77 #define CTLTYPE_UINT    6       /* name describes an unsigned integer */
  78 #define CTLTYPE_LONG    7       /* name describes a long */
  79 #define CTLTYPE_ULONG   8       /* name describes an unsigned long */
  80 #define CTLTYPE_UQUAD   9       /* name describes an unsigned 64-bit number */
  81
  82 #define CTLFLAG_RD      0x80000000      /* Allow reads of variable */
  83 #define CTLFLAG_WR      0x40000000      /* Allow writes to the variable */
  84 #define CTLFLAG_RW      (CTLFLAG_RD|CTLFLAG_WR)
  85 #define CTLFLAG_NOLOCK  0x20000000      /* XXX Don't Lock */
  86 #define CTLFLAG_ANYBODY 0x10000000      /* All users can set this var */
  87 #define CTLFLAG_SECURE  0x08000000      /* Permit set only if securelevel<=0 */
  88 #define CTLFLAG_PRISON  0x04000000      /* Prisoned roots can fiddle */
  89 #define CTLFLAG_DYN     0x02000000      /* Dynamic oid - can be freed */
  90
  91 /*
  92  * USE THIS instead of a hardwired number from the categories below
  93  * to get dynamically assigned sysctl entries using the linker-set
  94  * technology. This is the way nearly all new sysctl variables should
  95  * be implemented.
  96  * e.g. SYSCTL_INT(_parent, OID_AUTO, name, CTLFLAG_RW, &variable, 0, "");
  97  */
  98 #define OID_AUTO        (-1)
  99
 100 #ifdef _KERNEL
 101 #define SYSCTL_HANDLER_ARGS struct sysctl_oid *oidp, void *arg1, int arg2, \
 102         struct sysctl_req *req
 103
 104 /*
 105  * This describes the access space for a sysctl request.  This is needed
 106  * so that we can use the interface from the kernel or from user-space.
 107  */
 108 struct sysctl_req {
 109         struct thread   *td;
 110         int             lock;
 111         void            *oldptr;
 112         size_t          oldlen;
 113         size_t          oldidx;
 114         int             (*oldfunc)(struct sysctl_req *, const void *, size_t);
 115         void            *newptr;
 116         size_t          newlen;
 117         size_t          newidx;
 118         int             (*newfunc)(struct sysctl_req *, void *, size_t);
 119 };
 120
 121 SLIST_HEAD(sysctl_oid_list, sysctl_oid);
 122
 123 /*
 124  * This describes one "oid" in the MIB tree.  Potentially more nodes can
 125  * be hidden behind it, expanded by the handler.
 126  */
 127 struct sysctl_oid {
 128         struct sysctl_oid_list *oid_parent;
 129         SLIST_ENTRY(sysctl_oid) oid_link;
 130         int             oid_number;
 131         int             oid_kind;
 132         void            *oid_arg1;
 133         int             oid_arg2;
 134         const char      *oid_name;
 135         int             (*oid_handler)(SYSCTL_HANDLER_ARGS);
 136         const char      *oid_fmt;
 137         int             oid_refcnt;
 138         const char      *oid_descr;
 139 };
 140
 141 #define SYSCTL_IN(r, p, l) (r->newfunc)(r, p, l)
 142 #define SYSCTL_OUT(r, p, l) (r->oldfunc)(r, p, l)
 143
 144 int sysctl_handle_int(SYSCTL_HANDLER_ARGS);
 145 int sysctl_handle_long(SYSCTL_HANDLER_ARGS);
 146 int sysctl_handle_quad(SYSCTL_HANDLER_ARGS);
 147 int sysctl_handle_intptr(SYSCTL_HANDLER_ARGS);
 148 int sysctl_handle_string(SYSCTL_HANDLER_ARGS);
 149 int sysctl_handle_opaque(SYSCTL_HANDLER_ARGS);
 150
 151 /*
 152  * These functions are used to add/remove an oid from the mib.
 153  */
 154 void sysctl_register_oid(struct sysctl_oid *oidp);
 155 void sysctl_unregister_oid(struct sysctl_oid *oidp);
 156
 157 /* Declare a static oid to allow child oids to be added to it. */
 158 #define SYSCTL_DECL(name)                                       \
 159         extern struct sysctl_oid_list sysctl_##name##_children
 160
 161 /* Hide these in macros */
 162 #define SYSCTL_SET_CHILDREN(oid_ptr, children) do {                     \
 163         (oid_ptr)->oid_arg1 = (children);                               \
 164 } while(0)
 165 #define SYSCTL_CHILDREN(oid_ptr) (struct sysctl_oid_list *) \
 166         (oid_ptr)->oid_arg1
 167 #define SYSCTL_STATIC_CHILDREN(oid_name) \
 168         (&sysctl_##oid_name##_children)
 169
 170 /* === Structs and macros related to context handling === */
 171
 172 /* All dynamically created sysctls can be tracked in a context list. */
 173 struct sysctl_ctx_entry {
 174         struct sysctl_oid *entry;
 175         TAILQ_ENTRY(sysctl_ctx_entry) link;
 176 };
 177
 178 TAILQ_HEAD(sysctl_ctx_list, sysctl_ctx_entry);
 179
 180 #define SYSCTL_NODE_CHILDREN(parent, name) \
 181         sysctl_##parent##_##name##_children
 182
 183 /* This constructs a "raw" MIB oid. */
 184 #define SYSCTL_OID(parent, nbr, name, kind, a1, a2, handler, fmt, descr) \
 185         static struct sysctl_oid sysctl__##parent##_##name = {           \
 186                 &sysctl_##parent##_children, { 0 },                      \
 187                 nbr, kind, a1, a2, #name, handler, fmt, 0, descr };              \
 188         DATA_SET(sysctl_set, sysctl__##parent##_##name);
 189
 190 #define SYSCTL_ADD_OID(ctx, parent, nbr, name, kind, a1, a2, handler, fmt, descr) \
 191         sysctl_add_oid(ctx, parent, nbr, name, kind, a1, a2, handler, fmt, descr);
 192
 193 /* This constructs a node from which other oids can hang. */
 194 #define SYSCTL_NODE(parent, nbr, name, access, handler, descr)              \
 195         struct sysctl_oid_list sysctl_##parent##_##name##_children;         \
 196         SYSCTL_OID(parent, nbr, name, CTLTYPE_NODE|access,                  \
 197                    (void*)&sysctl_##parent##_##name##_children, 0, handler, \
 198                    "N", descr);
 199
 200 #define SYSCTL_ADD_NODE(ctx, parent, nbr, name, access, handler, descr)     \
 201         sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_NODE|access,         \
 202         0, 0, handler, "N", descr);
 203
 204 /* Oid for a string.  len can be 0 to indicate '\0' termination. */
 205 #define SYSCTL_STRING(parent, nbr, name, access, arg, len, descr) \
 206         SYSCTL_OID(parent, nbr, name, CTLTYPE_STRING|access, \
 207                 arg, len, sysctl_handle_string, "A", descr)
 208
 209 #define SYSCTL_ADD_STRING(ctx, parent, nbr, name, access, arg, len, descr)  \
 210         sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_STRING|access,       \
 211         arg, len, sysctl_handle_string, "A", descr);
 212
 213 /* Oid for an int.  If ptr is NULL, val is returned. */
 214 #define SYSCTL_INT(parent, nbr, name, access, ptr, val, descr) \
 215         SYSCTL_OID(parent, nbr, name, CTLTYPE_INT|access, \
 216                 ptr, val, sysctl_handle_int, "I", descr)
 217
 218 #define SYSCTL_ADD_INT(ctx, parent, nbr, name, access, ptr, val, descr)     \
 219         sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_INT|access,          \
 220         ptr, val, sysctl_handle_int, "I", descr);
 221
 222 /* Oid for a quad.  If ptr is NULL, val is returned. */
 223 #define SYSCTL_QUAD(parent, nbr, name, access, ptr, val, descr) \
 224         SYSCTL_OID(parent, nbr, name, CTLTYPE_QUAD|access, \
 225                 ptr, val, sysctl_handle_quad, "Q", descr)
 226
 227 #define SYSCTL_ADD_QUAD(ctx, parent, nbr, name, access, ptr, val, descr)    \
 228         sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_QUAD|access,         \
 229         ptr, val, sysctl_handle_quad, "Q", descr);
 230
 231 /* Oid for an unsigned quad.  If ptr is NULL, val is returned. */
 232 #define SYSCTL_UQUAD(parent, nbr, name, access, ptr, val, descr)            \
 233         SYSCTL_OID(parent, nbr, name, CTLTYPE_UQUAD|access,                 \
 234                 ptr, val, sysctl_handle_quad, "QU", descr)
 235
 236 #define SYSCTL_ADD_UQUAD(ctx, parent, nbr, name, access, ptr, val, descr)   \
 237         sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_UQUAD|access,        \
 238         ptr, val, sysctl_handle_quad, "QU", descr);
 239
 240 /* Oid for an unsigned int.  If ptr is NULL, val is returned. */
 241 #define SYSCTL_UINT(parent, nbr, name, access, ptr, val, descr) \
 242         SYSCTL_OID(parent, nbr, name, CTLTYPE_UINT|access, \
 243                 ptr, val, sysctl_handle_int, "IU", descr)
 244
 245 #define SYSCTL_ADD_UINT(ctx, parent, nbr, name, access, ptr, val, descr)    \
 246         sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_UINT|access,         \
 247         ptr, val, sysctl_handle_int, "IU", descr);
 248
 249 /* Oid for a long.  The pointer must be non NULL. */
 250 #define SYSCTL_LONG(parent, nbr, name, access, ptr, val, descr) \
 251         SYSCTL_OID(parent, nbr, name, CTLTYPE_LONG|access, \
 252                 ptr, val, sysctl_handle_long, "L", descr)
 253
 254 #define SYSCTL_ADD_LONG(ctx, parent, nbr, name, access, ptr, descr)         \
 255         sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_LONG|access,         \
 256         ptr, 0, sysctl_handle_long, "L", descr);
 257
 258 /* Oid for a long.  The pointer must be non NULL. */
 259 #define SYSCTL_ULONG(parent, nbr, name, access, ptr, val, descr) \
 260         SYSCTL_OID(parent, nbr, name, CTLTYPE_ULONG|access, \
 261                 ptr, val, sysctl_handle_long, "LU", descr)
 262
 263 #define SYSCTL_ADD_ULONG(ctx, parent, nbr, name, access, ptr, descr)        \
 264         sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_ULONG|access,        \
 265         ptr, 0, sysctl_handle_long, "LU", descr);
 266
 267 /* Oid for an opaque object.  Specified by a pointer and a length. */
 268 #define SYSCTL_OPAQUE(parent, nbr, name, access, ptr, len, fmt, descr) \
 269         SYSCTL_OID(parent, nbr, name, CTLTYPE_OPAQUE|access, \
 270                 ptr, len, sysctl_handle_opaque, fmt, descr)
 271
 272 #define SYSCTL_ADD_OPAQUE(ctx, parent, nbr, name, access, ptr, len, fmt, descr)\
 273         sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_OPAQUE|access,       \
 274         ptr, len, sysctl_handle_opaque, fmt, descr);
 275
 276 /* Oid for a struct.  Specified by a pointer and a type. */
 277 #define SYSCTL_STRUCT(parent, nbr, name, access, ptr, type, descr) \
 278         SYSCTL_OID(parent, nbr, name, CTLTYPE_OPAQUE|access, \
 279                 ptr, sizeof(struct type), sysctl_handle_opaque, \
 280                 "S," #type, descr)
 281
 282 #define SYSCTL_ADD_STRUCT(ctx, parent, nbr, name, access, ptr, type, descr) \
 283         sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_OPAQUE|access,       \
 284         ptr, sizeof(struct type), sysctl_handle_opaque, "S," #type, descr);
 285
 286 /* Oid for a procedure.  Specified by a pointer and an arg. */
 287 #define SYSCTL_PROC(parent, nbr, name, access, ptr, arg, handler, fmt, descr) \
 288         SYSCTL_OID(parent, nbr, name, access, \
 289                 ptr, arg, handler, fmt, descr)
 290
 291 #define SYSCTL_ADD_PROC(ctx, parent, nbr, name, access, ptr, arg, handler, fmt, descr) \
 292         sysctl_add_oid(ctx, parent, nbr, name, access,                      \
 293         ptr, arg, handler, fmt, descr);
 294
 295 #endif /* _KERNEL */
 296
 297 /*
 298  * Top-level identifiers
 299  */
 300 #define CTL_UNSPEC      0               /* unused */
 301 #define CTL_KERN        1               /* "high kernel": proc, limits */
 302 #define CTL_VM          2               /* virtual memory */
 303 #define CTL_VFS         3               /* file system, mount type is next */
 304 #define CTL_NET         4               /* network, see socket.h */
 305 #define CTL_DEBUG       5               /* debugging parameters */
 306 #define CTL_HW          6               /* generic cpu/io */
 307 #define CTL_MACHDEP     7               /* machine dependent */
 308 #define CTL_USER        8               /* user-level */
 309 #define CTL_P1003_1B    9               /* POSIX 1003.1B */
 310 #define CTL_LWKT        10              /* light weight kernel threads */
 311 #define CTL_MAXID       11              /* number of valid top-level ids */
 312
 313 #define CTL_NAMES { \
 314         { 0, 0 }, \
 315         { "kern", CTLTYPE_NODE }, \
 316         { "vm", CTLTYPE_NODE }, \
 317         { "vfs", CTLTYPE_NODE }, \
 318         { "net", CTLTYPE_NODE }, \
 319         { "debug", CTLTYPE_NODE }, \
 320         { "hw", CTLTYPE_NODE }, \
 321         { "machdep", CTLTYPE_NODE }, \
 322         { "user", CTLTYPE_NODE }, \
 323         { "p1003_1b", CTLTYPE_NODE }, \
 324         { "lwkt", CTLTYPE_NODE }, \
 325 }
 326
 327 /*
 328  * CTL_KERN identifiers
 329  */
 330 #define KERN_OSTYPE              1      /* string: system version */
 331 #define KERN_OSRELEASE           2      /* string: system release */
 332 #define KERN_OSREV               3      /* int: system revision */
 333 #define KERN_VERSION             4      /* string: compile time info */
 334 #define KERN_MAXVNODES           5      /* int: max vnodes */
 335 #define KERN_MAXPROC             6      /* int: max processes */
 336 #define KERN_MAXFILES            7      /* int: max open files */
 337 #define KERN_ARGMAX              8      /* int: max arguments to exec */
 338 #define KERN_SECURELVL           9      /* int: system security level */
 339 #define KERN_HOSTNAME           10      /* string: hostname */
 340 #define KERN_HOSTID             11      /* int: host identifier */
 341 #define KERN_CLOCKRATE          12      /* struct: struct clockrate */
 342 #define KERN_VNODE              13      /* struct: vnode structures */
 343 #define KERN_PROC               14      /* struct: process entries */
 344 #define KERN_FILE               15      /* struct: file entries */
 345 #define KERN_PROF               16      /* node: kernel profiling info */
 346 #define KERN_POSIX1             17      /* int: POSIX.1 version */
 347 #define KERN_NGROUPS            18      /* int: # of supplemental group ids */
 348 #define KERN_JOB_CONTROL        19      /* int: is job control available */
 349 #define KERN_SAVED_IDS          20      /* int: saved set-user/group-ID */
 350 #define KERN_BOOTTIME           21      /* struct: time kernel was booted */
 351 #define KERN_NISDOMAINNAME      22      /* string: YP domain name */
 352 #define KERN_UPDATEINTERVAL     23      /* int: update process sleep time */
 353 #define KERN_OSRELDATE          24      /* int: OS release date */
 354 #define KERN_NTP_PLL            25      /* node: NTP PLL control */
 355 #define KERN_BOOTFILE           26      /* string: name of booted kernel */
 356 #define KERN_MAXFILESPERPROC    27      /* int: max open files per proc */
 357 #define KERN_MAXPROCPERUID      28      /* int: max processes per uid */
 358 #define KERN_DUMPDEV            29      /* dev_t: device to dump on */
 359 #define KERN_IPC                30      /* node: anything related to IPC */
 360 #define KERN_DUMMY              31      /* unused */
 361 #define KERN_PS_STRINGS         32      /* int: address of PS_STRINGS */
 362 #define KERN_USRSTACK           33      /* int: address of USRSTACK */
 363 #define KERN_LOGSIGEXIT         34      /* int: do we log sigexit procs? */
 364 #define KERN_IOV_MAX            35      /* int: value of UIO_MAXIOV */
 365 #define KERN_MAXPOSIXLOCKSPERUID 36     /* int: max POSIX locks per uid */
 366 #define KERN_MAXID              37      /* number of valid kern ids */
 367
 368 #define CTL_KERN_NAMES { \
 369         { 0, 0 }, \
 370         { "ostype", CTLTYPE_STRING }, \
 371         { "osrelease", CTLTYPE_STRING }, \
 372         { "osrevision", CTLTYPE_INT }, \
 373         { "version", CTLTYPE_STRING }, \
 374         { "maxvnodes", CTLTYPE_INT }, \
 375         { "maxproc", CTLTYPE_INT }, \
 376         { "maxfiles", CTLTYPE_INT }, \
 377         { "argmax", CTLTYPE_INT }, \
 378         { "securelevel", CTLTYPE_INT }, \
 379         { "hostname", CTLTYPE_STRING }, \
 380         { "hostid", CTLTYPE_UINT }, \
 381         { "clockrate", CTLTYPE_STRUCT }, \
 382         { "vnode", CTLTYPE_STRUCT }, \
 383         { "proc", CTLTYPE_STRUCT }, \
 384         { "file", CTLTYPE_STRUCT }, \
 385         { "profiling", CTLTYPE_NODE }, \
 386         { "posix1version", CTLTYPE_INT }, \
 387         { "ngroups", CTLTYPE_INT }, \
 388         { "job_control", CTLTYPE_INT }, \
 389         { "saved_ids", CTLTYPE_INT }, \
 390         { "boottime", CTLTYPE_STRUCT }, \
 391         { "nisdomainname", CTLTYPE_STRING }, \
 392         { "update", CTLTYPE_INT }, \
 393         { "osreldate", CTLTYPE_INT }, \
 394         { "ntp_pll", CTLTYPE_NODE }, \
 395         { "bootfile", CTLTYPE_STRING }, \
 396         { "maxfilesperproc", CTLTYPE_INT }, \
 397         { "maxprocperuid", CTLTYPE_INT }, \
 398         { "maxposixlocksperuid", CTLTYPE_INT }, \
 399         { "dumpdev", CTLTYPE_STRUCT }, /* we lie; don't print as int */ \
 400         { "ipc", CTLTYPE_NODE }, \
 401         { "dummy", CTLTYPE_INT }, \
 402         { "ps_strings", CTLTYPE_INT }, \
 403         { "usrstack", CTLTYPE_INT }, \
 404         { "logsigexit", CTLTYPE_INT }, \
 405         { "iov_max", CTLTYPE_INT }, \
 406 }
 407
 408 /*
 409  * CTL_VFS identifiers
 410  */
 411 #define CTL_VFS_NAMES { \
 412         { "vfsconf", CTLTYPE_STRUCT }, \
 413 }
 414
 415 /*
 416  * KERN_PROC subtypes
 417  */
 418 #define KERN_PROC_ALL           0       /* everything */
 419 #define KERN_PROC_PID           1       /* by process id */
 420 #define KERN_PROC_PGRP          2       /* by process group id */
 421 #define KERN_PROC_SESSION       3       /* by session of pid */
 422 #define KERN_PROC_TTY           4       /* by controlling tty */
 423 #define KERN_PROC_UID           5       /* by effective uid */
 424 #define KERN_PROC_RUID          6       /* by real uid */
 425 #define KERN_PROC_ARGS          7       /* get/set arguments/proctitle */
 426
 427 /*
 428  * KERN_IPC identifiers
 429  */
 430 #define KIPC_MAXSOCKBUF         1       /* int: max size of a socket buffer */
 431 #define KIPC_SOCKBUF_WASTE      2       /* int: wastage factor in sockbuf */
 432 #define KIPC_SOMAXCONN          3       /* int: max length of connection q */
 433 #define KIPC_MAX_LINKHDR        4       /* int: max length of link header */
 434 #define KIPC_MAX_PROTOHDR       5       /* int: max length of network header */
 435 #define KIPC_MAX_HDR            6       /* int: max total length of headers */
 436 #define KIPC_MAX_DATALEN        7       /* int: max length of data? */
 437 #define KIPC_MBSTAT             8       /* struct: mbuf usage statistics */
 438 #define KIPC_NMBCLUSTERS        9       /* int: maximum mbuf clusters */
 439
 440 /*
 441  * CTL_HW identifiers
 442  */
 443 #define HW_MACHINE       1              /* string: machine class */
 444 #define HW_MODEL         2              /* string: specific machine model */
 445 #define HW_NCPU          3              /* int: number of cpus */
 446 #define HW_BYTEORDER     4              /* int: machine byte order */
 447 #define HW_PHYSMEM       5              /* int: total memory */
 448 #define HW_USERMEM       6              /* int: non-kernel memory */
 449 #define HW_PAGESIZE      7              /* int: software page size */
 450 #define HW_DISKNAMES     8              /* strings: disk drive names */
 451 #define HW_DISKSTATS     9              /* struct: diskstats[] */
 452 #define HW_FLOATINGPT   10              /* int: has HW floating point? */
 453 #define HW_MACHINE_ARCH 11              /* string: machine architecture */
 454 #define HW_MAXID        12              /* number of valid hw ids */
 455
 456 #define CTL_HW_NAMES { \
 457         { 0, 0 }, \
 458         { "machine", CTLTYPE_STRING }, \
 459         { "model", CTLTYPE_STRING }, \
 460         { "ncpu", CTLTYPE_INT }, \
 461         { "byteorder", CTLTYPE_INT }, \
 462         { "physmem", CTLTYPE_UINT }, \
 463         { "usermem", CTLTYPE_UINT }, \
 464         { "pagesize", CTLTYPE_INT }, \
 465         { "disknames", CTLTYPE_STRUCT }, \
 466         { "diskstats", CTLTYPE_STRUCT }, \
 467         { "floatingpoint", CTLTYPE_INT }, \
 468 }
 469
 470 /*
 471  * CTL_USER definitions
 472  */
 473 #define USER_CS_PATH             1      /* string: _CS_PATH */
 474 #define USER_BC_BASE_MAX         2      /* int: BC_BASE_MAX */
 475 #define USER_BC_DIM_MAX          3      /* int: BC_DIM_MAX */
 476 #define USER_BC_SCALE_MAX        4      /* int: BC_SCALE_MAX */
 477 #define USER_BC_STRING_MAX       5      /* int: BC_STRING_MAX */
 478 #define USER_COLL_WEIGHTS_MAX    6      /* int: COLL_WEIGHTS_MAX */
 479 #define USER_EXPR_NEST_MAX       7      /* int: EXPR_NEST_MAX */
 480 #define USER_LINE_MAX            8      /* int: LINE_MAX */
 481 #define USER_RE_DUP_MAX          9      /* int: RE_DUP_MAX */
 482 #define USER_POSIX2_VERSION     10      /* int: POSIX2_VERSION */
 483 #define USER_POSIX2_C_BIND      11      /* int: POSIX2_C_BIND */
 484 #define USER_POSIX2_C_DEV       12      /* int: POSIX2_C_DEV */
 485 #define USER_POSIX2_CHAR_TERM   13      /* int: POSIX2_CHAR_TERM */
 486 #define USER_POSIX2_FORT_DEV    14      /* int: POSIX2_FORT_DEV */
 487 #define USER_POSIX2_FORT_RUN    15      /* int: POSIX2_FORT_RUN */
 488 #define USER_POSIX2_LOCALEDEF   16      /* int: POSIX2_LOCALEDEF */
 489 #define USER_POSIX2_SW_DEV      17      /* int: POSIX2_SW_DEV */
 490 #define USER_POSIX2_UPE         18      /* int: POSIX2_UPE */
 491 #define USER_STREAM_MAX         19      /* int: POSIX2_STREAM_MAX */
 492 #define USER_TZNAME_MAX         20      /* int: POSIX2_TZNAME_MAX */
 493 #define USER_MAXID              21      /* number of valid user ids */
 494
 495 #define CTL_USER_NAMES { \
 496         { 0, 0 }, \
 497         { "cs_path", CTLTYPE_STRING }, \
 498         { "bc_base_max", CTLTYPE_INT }, \
 499         { "bc_dim_max", CTLTYPE_INT }, \
 500         { "bc_scale_max", CTLTYPE_INT }, \
 501         { "bc_string_max", CTLTYPE_INT }, \
 502         { "coll_weights_max", CTLTYPE_INT }, \
 503         { "expr_nest_max", CTLTYPE_INT }, \
 504         { "line_max", CTLTYPE_INT }, \
 505         { "re_dup_max", CTLTYPE_INT }, \
 506         { "posix2_version", CTLTYPE_INT }, \
 507         { "posix2_c_bind", CTLTYPE_INT }, \
 508         { "posix2_c_dev", CTLTYPE_INT }, \
 509         { "posix2_char_term", CTLTYPE_INT }, \
 510         { "posix2_fort_dev", CTLTYPE_INT }, \
 511         { "posix2_fort_run", CTLTYPE_INT }, \
 512         { "posix2_localedef", CTLTYPE_INT }, \
 513         { "posix2_sw_dev", CTLTYPE_INT }, \
 514         { "posix2_upe", CTLTYPE_INT }, \
 515         { "stream_max", CTLTYPE_INT }, \
 516         { "tzname_max", CTLTYPE_INT }, \
 517 }
 518
 519 #define CTL_P1003_1B_ASYNCHRONOUS_IO            1       /* boolean */
 520 #define CTL_P1003_1B_MAPPED_FILES               2       /* boolean */
 521 #define CTL_P1003_1B_MEMLOCK                    3       /* boolean */
 522 #define CTL_P1003_1B_MEMLOCK_RANGE              4       /* boolean */
 523 #define CTL_P1003_1B_MEMORY_PROTECTION          5       /* boolean */
 524 #define CTL_P1003_1B_MESSAGE_PASSING            6       /* boolean */
 525 #define CTL_P1003_1B_PRIORITIZED_IO             7       /* boolean */
 526 #define CTL_P1003_1B_PRIORITY_SCHEDULING        8       /* boolean */
 527 #define CTL_P1003_1B_REALTIME_SIGNALS           9       /* boolean */
 528 #define CTL_P1003_1B_SEMAPHORES                 10      /* boolean */
 529 #define CTL_P1003_1B_FSYNC                      11      /* boolean */
 530 #define CTL_P1003_1B_SHARED_MEMORY_OBJECTS      12      /* boolean */
 531 #define CTL_P1003_1B_SYNCHRONIZED_IO            13      /* boolean */
 532 #define CTL_P1003_1B_TIMERS                     14      /* boolean */
 533 #define CTL_P1003_1B_AIO_LISTIO_MAX             15      /* int */
 534 #define CTL_P1003_1B_AIO_MAX                    16      /* int */
 535 #define CTL_P1003_1B_AIO_PRIO_DELTA_MAX         17      /* int */
 536 #define CTL_P1003_1B_DELAYTIMER_MAX             18      /* int */
 537 #define CTL_P1003_1B_MQ_OPEN_MAX                19      /* int */
 538 #define CTL_P1003_1B_PAGESIZE                   20      /* int */
 539 #define CTL_P1003_1B_RTSIG_MAX                  21      /* int */
 540 #define CTL_P1003_1B_SEM_NSEMS_MAX              22      /* int */
 541 #define CTL_P1003_1B_SEM_VALUE_MAX              23      /* int */
 542 #define CTL_P1003_1B_SIGQUEUE_MAX               24      /* int */
 543 #define CTL_P1003_1B_TIMER_MAX                  25      /* int */
 544
 545 #define CTL_P1003_1B_MAXID              26
 546
 547 #define CTL_P1003_1B_NAMES { \
 548         { 0, 0 }, \
 549         { "asynchronous_io", CTLTYPE_INT }, \
 550         { "mapped_files", CTLTYPE_INT }, \
 551         { "memlock", CTLTYPE_INT }, \
 552         { "memlock_range", CTLTYPE_INT }, \
 553         { "memory_protection", CTLTYPE_INT }, \
 554         { "message_passing", CTLTYPE_INT }, \
 555         { "prioritized_io", CTLTYPE_INT }, \
 556         { "priority_scheduling", CTLTYPE_INT }, \
 557         { "realtime_signals", CTLTYPE_INT }, \
 558         { "semaphores", CTLTYPE_INT }, \
 559         { "fsync", CTLTYPE_INT }, \
 560         { "shared_memory_objects", CTLTYPE_INT }, \
 561         { "synchronized_io", CTLTYPE_INT }, \
 562         { "timers", CTLTYPE_INT }, \
 563         { "aio_listio_max", CTLTYPE_INT }, \
 564         { "aio_max", CTLTYPE_INT }, \
 565         { "aio_prio_delta_max", CTLTYPE_INT }, \
 566         { "delaytimer_max", CTLTYPE_INT }, \
 567         { "mq_open_max", CTLTYPE_INT }, \
 568         { "pagesize", CTLTYPE_INT }, \
 569         { "rtsig_max", CTLTYPE_INT }, \
 570         { "nsems_max", CTLTYPE_INT }, \
 571         { "sem_value_max", CTLTYPE_INT }, \
 572         { "sigqueue_max", CTLTYPE_INT }, \
 573         { "timer_max", CTLTYPE_INT }, \
 574 }
 575
 576 #ifdef _KERNEL
 577
 578 /*
 579  * Declare some common oids.
 580  */
 581 extern struct sysctl_oid_list sysctl__children;
 582 SYSCTL_DECL(_kern);
 583 SYSCTL_DECL(_sysctl);
 584 SYSCTL_DECL(_vm);
 585 SYSCTL_DECL(_vfs);
 586 SYSCTL_DECL(_net);
 587 SYSCTL_DECL(_debug);
 588 SYSCTL_DECL(_debug_sizeof);
 589 SYSCTL_DECL(_hw);
 590 SYSCTL_DECL(_machdep);
 591 SYSCTL_DECL(_user);
 592 SYSCTL_DECL(_compat);
 593 SYSCTL_DECL(_lwkt);
 594
 595 /*
 596  * Common second-level oids.
 597  */
 598 SYSCTL_DECL(_kern_ipc);
 599
 600 extern char     machine[];
 601 extern char     osrelease[];
 602 extern char     ostype[];
 603 extern char     kern_ident[];
 604
 605 /* Dynamic oid handling */
 606 struct sysctl_oid *sysctl_add_oid(struct sysctl_ctx_list *clist,
 607                 struct sysctl_oid_list *parent, int nbr, const char *name,
 608                 int kind, void *arg1, int arg2,
 609                 int (*handler) (SYSCTL_HANDLER_ARGS),
 610                 const char *fmt, const char *descr);
 611 int     sysctl_remove_oid(struct sysctl_oid *oidp, int del, int recurse);
 612 int     sysctl_ctx_init(struct sysctl_ctx_list *clist);
 613 int     sysctl_ctx_free(struct sysctl_ctx_list *clist);
 614 struct  sysctl_ctx_entry *sysctl_ctx_entry_add(struct sysctl_ctx_list *clist,
 615                 struct sysctl_oid *oidp);
 616 struct  sysctl_ctx_entry *sysctl_ctx_entry_find(struct sysctl_ctx_list *clist,
 617                 struct sysctl_oid *oidp);
 618 int     sysctl_ctx_entry_del(struct sysctl_ctx_list *clist,
 619                 struct sysctl_oid *oidp);
 620
 621 int     kernel_sysctl(int *name, u_int namelen, void *old,
 622                       size_t *oldlenp, void *new, size_t newlen,
 623                       size_t *retval);
 624 int     kernel_sysctlbyname(char *name,
 625                 void *old, size_t *oldlenp, void *new, size_t newlen,
 626                 size_t *retval);
 627 int     userland_sysctl(int *name, u_int namelen, void *old,
 628                         size_t *oldlenp, int inkernel, void *new, size_t newlen,
 629                         size_t *retval);
 630 int     sysctl_find_oid(int *name, u_int namelen, struct sysctl_oid **noid,
 631                         int *nindx, struct sysctl_req *req);
 632
 633 #else   /* !_KERNEL */
 634 #include <sys/cdefs.h>
 635
 636 __BEGIN_DECLS
 637 int     sysctl (int *, u_int, void *, size_t *, void *, size_t);
 638 int     sysctlbyname (const char *, void *, size_t *, void *, size_t);
 639 int     sysctlnametomib (const char *, int *, size_t *);
 640 __END_DECLS
 641 #endif  /* _KERNEL */
 642
 643 #endif  /* !_SYS_SYSCTL_H_ */