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  * 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: head/sys/sys/sysctl.h 204170 2010-02-21 13:57:02Z ed $
   38  * $DragonFly: src/sys/sys/sysctl.h,v 1.29 2008/09/30 12:20:29 hasso Exp $
   39  */
   40 
   41 #ifndef _SYS_SYSCTL_H_
   42 #define _SYS_SYSCTL_H_
   43 
   44 #ifndef _SYS_TYPES_H_
   45 #include <sys/types.h>
   46 #endif
   47 #ifndef _SYS__POSIX_H_
   48 #include <sys/_posix.h>
   49 #endif
   50 #ifndef _SYS_QUEUE_H_
   51 #include <sys/queue.h>
   52 #endif
   53 
   54 /*
   55  * Definitions for sysctl call.  The sysctl call uses a hierarchical name
   56  * for objects that can be examined or modified.  The name is expressed as
   57  * a sequence of integers.  Like a file path name, the meaning of each
   58  * component depends on its place in the hierarchy.  The top-level and kern
   59  * identifiers are defined here, and other identifiers are defined in the
   60  * respective subsystem header files.
   61  */
   62 
   63 #define CTL_MAXNAME     12      /* largest number of components supported */
   64 
   65 /*
   66  * Each subsystem defined by sysctl defines a list of variables
   67  * for that subsystem. Each name is either a node with further
   68  * levels defined below it, or it is a leaf of some particular
   69  * type given below. Each sysctl level defines a set of name/type
   70  * pairs to be used by sysctl(1) in manipulating the subsystem.
   71  */
   72 struct ctlname {
   73         char    *ctl_name;      /* subsystem name */
   74         int     ctl_type;       /* type of name */
   75 };
   76 
   77 #define CTLTYPE         0xf     /* Mask for the type */
   78 #define CTLTYPE_NODE    1       /* name is a node */
   79 #define CTLTYPE_INT     2       /* name describes an integer */
   80 #define CTLTYPE_STRING  3       /* name describes a string */
   81 #define CTLTYPE_QUAD    4       /* name describes a 64-bit number */
   82 #define CTLTYPE_OPAQUE  5       /* name describes a structure */
   83 #define CTLTYPE_STRUCT  CTLTYPE_OPAQUE  /* name describes a structure */
   84 #define CTLTYPE_UINT    6       /* name describes an unsigned integer */
   85 #define CTLTYPE_LONG    7       /* name describes a long */
   86 #define CTLTYPE_ULONG   8       /* name describes an unsigned long */
   87 #define CTLTYPE_UQUAD   9       /* name describes an unsigned 64-bit number */
   88 
   89 #define CTLFLAG_RD      0x80000000      /* Allow reads of variable */
   90 #define CTLFLAG_WR      0x40000000      /* Allow writes to the variable */
   91 #define CTLFLAG_RW      (CTLFLAG_RD|CTLFLAG_WR)
   92 #define CTLFLAG_ANYBODY 0x10000000      /* All users can set this var */
   93 #define CTLFLAG_SECURE  0x08000000      /* Permit set only if securelevel<=0 */
   94 #define CTLFLAG_PRISON  0x04000000      /* Prisoned roots can fiddle */
   95 #define CTLFLAG_DYN     0x02000000      /* Dynamic oid - can be freed */
   96 
   97 /*
   98  * USE THIS instead of a hardwired number from the categories below
   99  * to get dynamically assigned sysctl entries using the linker-set
  100  * technology. This is the way nearly all new sysctl variables should
  101  * be implemented.
  102  * e.g. SYSCTL_INT(_parent, OID_AUTO, name, CTLFLAG_RW, &variable, 0, "");
  103  */ 
  104 #define OID_AUTO        (-1)
  105 
  106 #ifdef _KERNEL
  107 
  108 #include <sys/kernel.h>                 /* for DATA_SET */
  109 
  110 #define SYSCTL_HANDLER_ARGS struct sysctl_oid *oidp, void *arg1, int arg2, \
  111         struct sysctl_req *req
  112 
  113 /*
  114  * This describes the access space for a sysctl request.  This is needed
  115  * so that we can use the interface from the kernel or from user-space.
  116  */
  117 struct sysctl_req {
  118         struct thread   *td;
  119         int             unused01;       /* was lock */
  120         void            *oldptr;
  121         size_t          oldlen;
  122         size_t          oldidx;
  123         int             (*oldfunc)(struct sysctl_req *, const void *, size_t);
  124         void            *newptr;
  125         size_t          newlen;
  126         size_t          newidx;
  127         int             (*newfunc)(struct sysctl_req *, void *, size_t);
  128 };
  129 
  130 SLIST_HEAD(sysctl_oid_list, sysctl_oid);
  131 
  132 /*
  133  * This describes one "oid" in the MIB tree.  Potentially more nodes can
  134  * be hidden behind it, expanded by the handler.
  135  */
  136 struct sysctl_oid {
  137         struct sysctl_oid_list *oid_parent;
  138         SLIST_ENTRY(sysctl_oid) oid_link;
  139         int             oid_number;
  140         int             oid_kind;
  141         void            *oid_arg1;
  142         int             oid_arg2;
  143         const char      *oid_name;
  144         int             (*oid_handler)(SYSCTL_HANDLER_ARGS);
  145         const char      *oid_fmt;
  146         int             oid_refcnt;
  147         const char      *oid_descr;
  148 };
  149 
  150 #define SYSCTL_IN(r, p, l) (r->newfunc)(r, p, l)
  151 #define SYSCTL_OUT(r, p, l) (r->oldfunc)(r, p, l)
  152 
  153 int sysctl_handle_int(SYSCTL_HANDLER_ARGS);
  154 int sysctl_handle_long(SYSCTL_HANDLER_ARGS);
  155 int sysctl_handle_quad(SYSCTL_HANDLER_ARGS);
  156 int sysctl_handle_intptr(SYSCTL_HANDLER_ARGS);
  157 int sysctl_handle_string(SYSCTL_HANDLER_ARGS);
  158 int sysctl_handle_opaque(SYSCTL_HANDLER_ARGS);
  159 
  160 /*
  161  * These functions are used to add/remove an oid from the mib.
  162  */
  163 void sysctl_register_oid(struct sysctl_oid *oidp);
  164 void sysctl_unregister_oid(struct sysctl_oid *oidp);
  165 
  166 /* Declare a static oid to allow child oids to be added to it. */
  167 #define SYSCTL_DECL(name)                                       \
  168         extern struct sysctl_oid_list sysctl_##name##_children
  169 
  170 /* Hide these in macros */
  171 #define SYSCTL_SET_CHILDREN(oid_ptr, children) do {                     \
  172         (oid_ptr)->oid_arg1 = (children);                               \
  173 } while(0)
  174 #define SYSCTL_CHILDREN(oid_ptr) (struct sysctl_oid_list *) \
  175         (oid_ptr)->oid_arg1
  176 #define SYSCTL_STATIC_CHILDREN(oid_name) \
  177         (&sysctl_##oid_name##_children)
  178 
  179 /* === Structs and macros related to context handling === */
  180 
  181 /* All dynamically created sysctls can be tracked in a context list. */
  182 struct sysctl_ctx_entry {
  183         struct sysctl_oid *entry;
  184         TAILQ_ENTRY(sysctl_ctx_entry) link;
  185 };
  186 
  187 TAILQ_HEAD(sysctl_ctx_list, sysctl_ctx_entry);
  188 
  189 #define SYSCTL_NODE_CHILDREN(parent, name) \
  190         sysctl_##parent##_##name##_children
  191 
  192 /* This constructs a "raw" MIB oid. */
  193 #define SYSCTL_OID(parent, nbr, name, kind, a1, a2, handler, fmt, descr) \
  194         static struct sysctl_oid sysctl__##parent##_##name = {           \
  195                 &sysctl_##parent##_children, { 0 },                      \
  196                 nbr, kind, a1, a2, #name, handler, fmt, 0, descr };              \
  197         DATA_SET(sysctl_set, sysctl__##parent##_##name);
  198 
  199 #define SYSCTL_ADD_OID(ctx, parent, nbr, name, kind, a1, a2, handler, fmt, descr) \
  200         sysctl_add_oid(ctx, parent, nbr, name, kind, a1, a2, handler, fmt, descr);
  201 
  202 /* This constructs a node from which other oids can hang. */
  203 #define SYSCTL_NODE(parent, nbr, name, access, handler, descr)              \
  204         struct sysctl_oid_list sysctl_##parent##_##name##_children;         \
  205         SYSCTL_OID(parent, nbr, name, CTLTYPE_NODE|access,                  \
  206                    (void*)&sysctl_##parent##_##name##_children, 0, handler, \
  207                    "N", descr);
  208 
  209 #define SYSCTL_ADD_NODE(ctx, parent, nbr, name, access, handler, descr)     \
  210         sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_NODE|access,         \
  211         0, 0, handler, "N", descr)
  212 
  213 /* Oid for a string.  len can be 0 to indicate '\0' termination. */
  214 #define SYSCTL_STRING(parent, nbr, name, access, arg, len, descr) \
  215         SYSCTL_OID(parent, nbr, name, CTLTYPE_STRING|access, \
  216                 arg, len, sysctl_handle_string, "A", descr)
  217 
  218 #define SYSCTL_ADD_STRING(ctx, parent, nbr, name, access, arg, len, descr)  \
  219         sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_STRING|access,       \
  220         arg, len, sysctl_handle_string, "A", descr)
  221 
  222 /* Oid for an int.  If ptr is NULL, val is returned. */
  223 #define SYSCTL_INT(parent, nbr, name, access, ptr, val, descr) \
  224         SYSCTL_OID(parent, nbr, name, CTLTYPE_INT|access, \
  225                 ptr, val, sysctl_handle_int, "I", descr)
  226 
  227 #define SYSCTL_ADD_INT(ctx, parent, nbr, name, access, ptr, val, descr)     \
  228         sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_INT|access,          \
  229         ptr, val, sysctl_handle_int, "I", descr)
  230 
  231 /* Oid for a quad.  If ptr is NULL, val is returned. */
  232 #define SYSCTL_QUAD(parent, nbr, name, access, ptr, val, descr) \
  233         SYSCTL_OID(parent, nbr, name, CTLTYPE_QUAD|access, \
  234                 ptr, val, sysctl_handle_quad, "Q", descr)
  235 
  236 #define SYSCTL_ADD_QUAD(ctx, parent, nbr, name, access, ptr, val, descr)    \
  237         sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_QUAD|access,         \
  238         ptr, val, sysctl_handle_quad, "Q", descr)
  239 
  240 /* Oid for an unsigned quad.  If ptr is NULL, val is returned. */
  241 #define SYSCTL_UQUAD(parent, nbr, name, access, ptr, val, descr)            \
  242         SYSCTL_OID(parent, nbr, name, CTLTYPE_UQUAD|access,                 \
  243                 ptr, val, sysctl_handle_quad, "QU", descr)
  244 
  245 #define SYSCTL_ADD_UQUAD(ctx, parent, nbr, name, access, ptr, val, descr)   \
  246         sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_UQUAD|access,        \
  247         ptr, val, sysctl_handle_quad, "QU", descr)
  248 
  249 /* Oid for an unsigned int.  If ptr is NULL, val is returned. */
  250 #define SYSCTL_UINT(parent, nbr, name, access, ptr, val, descr) \
  251         SYSCTL_OID(parent, nbr, name, CTLTYPE_UINT|access, \
  252                 ptr, val, sysctl_handle_int, "IU", descr)
  253 
  254 #define SYSCTL_ADD_UINT(ctx, parent, nbr, name, access, ptr, val, descr)    \
  255         sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_UINT|access,         \
  256         ptr, val, sysctl_handle_int, "IU", descr)
  257 
  258 /* Oid for a long.  The pointer must be non NULL. */
  259 #define SYSCTL_LONG(parent, nbr, name, access, ptr, val, descr) \
  260         SYSCTL_OID(parent, nbr, name, CTLTYPE_LONG|access, \
  261                 ptr, val, sysctl_handle_long, "L", descr)
  262 
  263 #define SYSCTL_ADD_LONG(ctx, parent, nbr, name, access, ptr, descr)         \
  264         sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_LONG|access,         \
  265         ptr, 0, sysctl_handle_long, "L", descr)
  266 
  267 /* Oid for a long.  The pointer must be non NULL. */
  268 #define SYSCTL_ULONG(parent, nbr, name, access, ptr, val, descr) \
  269         SYSCTL_OID(parent, nbr, name, CTLTYPE_ULONG|access, \
  270                 ptr, val, sysctl_handle_long, "LU", descr)
  271 
  272 #define SYSCTL_ADD_ULONG(ctx, parent, nbr, name, access, ptr, descr)        \
  273         sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_ULONG|access,        \
  274         ptr, 0, sysctl_handle_long, "LU", descr)
  275 
  276 /* Oid for an opaque object.  Specified by a pointer and a length. */
  277 #define SYSCTL_OPAQUE(parent, nbr, name, access, ptr, len, fmt, descr) \
  278         SYSCTL_OID(parent, nbr, name, CTLTYPE_OPAQUE|access, \
  279                 ptr, len, sysctl_handle_opaque, fmt, descr)
  280 
  281 #define SYSCTL_ADD_OPAQUE(ctx, parent, nbr, name, access, ptr, len, fmt, descr)\
  282         sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_OPAQUE|access,       \
  283         ptr, len, sysctl_handle_opaque, fmt, descr)
  284 
  285 /* Oid for a struct.  Specified by a pointer and a type. */
  286 #define SYSCTL_STRUCT(parent, nbr, name, access, ptr, type, descr) \
  287         SYSCTL_OID(parent, nbr, name, CTLTYPE_OPAQUE|access, \
  288                 ptr, sizeof(struct type), sysctl_handle_opaque, \
  289                 "S," #type, descr)
  290 
  291 #define SYSCTL_ADD_STRUCT(ctx, parent, nbr, name, access, ptr, type, descr) \
  292         sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_OPAQUE|access,       \
  293         ptr, sizeof(struct type), sysctl_handle_opaque, "S," #type, descr)
  294 
  295 /* Oid for a procedure.  Specified by a pointer and an arg. */
  296 #define SYSCTL_PROC(parent, nbr, name, access, ptr, arg, handler, fmt, descr) \
  297         SYSCTL_OID(parent, nbr, name, access, \
  298                 ptr, arg, handler, fmt, descr)
  299 
  300 #define SYSCTL_ADD_PROC(ctx, parent, nbr, name, access, ptr, arg, handler, fmt, descr) \
  301         sysctl_add_oid(ctx, parent, nbr, name, access,                      \
  302         ptr, arg, handler, fmt, descr)
  303 
  304 #endif /* _KERNEL */
  305 
  306 /*
  307  * Top-level identifiers
  308  */
  309 #define CTL_UNSPEC      0               /* unused */
  310 #define CTL_KERN        1               /* "high kernel": proc, limits */
  311 #define CTL_VM          2               /* virtual memory */
  312 #define CTL_VFS         3               /* file system, mount type is next */
  313 #define CTL_NET         4               /* network, see socket.h */
  314 #define CTL_DEBUG       5               /* debugging parameters */
  315 #define CTL_HW          6               /* generic cpu/io */
  316 #define CTL_MACHDEP     7               /* machine dependent */
  317 #define CTL_USER        8               /* user-level */
  318 #define CTL_P1003_1B    9               /* POSIX 1003.1B */
  319 #define CTL_LWKT        10              /* light weight kernel threads */
  320 #define CTL_MAXID       11              /* number of valid top-level ids */
  321 
  322 #define CTL_NAMES { \
  323         { 0, 0 }, \
  324         { "kern", CTLTYPE_NODE }, \
  325         { "vm", CTLTYPE_NODE }, \
  326         { "vfs", CTLTYPE_NODE }, \
  327         { "net", CTLTYPE_NODE }, \
  328         { "debug", CTLTYPE_NODE }, \
  329         { "hw", CTLTYPE_NODE }, \
  330         { "machdep", CTLTYPE_NODE }, \
  331         { "user", CTLTYPE_NODE }, \
  332         { "p1003_1b", CTLTYPE_NODE }, \
  333         { "lwkt", CTLTYPE_NODE }, \
  334 }
  335 
  336 /*
  337  * CTL_KERN identifiers
  338  */
  339 #define KERN_OSTYPE              1      /* string: system version */
  340 #define KERN_OSRELEASE           2      /* string: system release */
  341 #define KERN_OSREV               3      /* int: system revision */
  342 #define KERN_VERSION             4      /* string: compile time info */
  343 #define KERN_MAXVNODES           5      /* int: max vnodes */
  344 #define KERN_MAXPROC             6      /* int: max processes */
  345 #define KERN_MAXFILES            7      /* int: max open files */
  346 #define KERN_ARGMAX              8      /* int: max arguments to exec */
  347 #define KERN_SECURELVL           9      /* int: system security level */
  348 #define KERN_HOSTNAME           10      /* string: hostname */
  349 #define KERN_HOSTID             11      /* int: host identifier */
  350 #define KERN_CLOCKRATE          12      /* struct: struct clockrate */
  351 #define KERN_VNODE              13      /* struct: vnode structures */
  352 #define KERN_PROC               14      /* struct: process entries */
  353 #define KERN_FILE               15      /* struct: file entries */
  354 #define KERN_PROF               16      /* node: kernel profiling info */
  355 #define KERN_POSIX1             17      /* int: POSIX.1 version */
  356 #define KERN_NGROUPS            18      /* int: # of supplemental group ids */
  357 #define KERN_JOB_CONTROL        19      /* int: is job control available */
  358 #define KERN_SAVED_IDS          20      /* int: saved set-user/group-ID */
  359 #define KERN_BOOTTIME           21      /* struct: time kernel was booted */
  360 #define KERN_NISDOMAINNAME      22      /* string: YP domain name */
  361 #define KERN_UPDATEINTERVAL     23      /* int: update process sleep time */
  362 #define KERN_OSRELDATE          24      /* int: OS release date */
  363 #define KERN_NTP_PLL            25      /* node: NTP PLL control */
  364 #define KERN_BOOTFILE           26      /* string: name of booted kernel */
  365 #define KERN_MAXFILESPERPROC    27      /* int: max open files per proc */
  366 #define KERN_MAXPROCPERUID      28      /* int: max processes per uid */
  367 #define KERN_DUMPDEV            29      /* udev_t: device to dump on */
  368 #define KERN_IPC                30      /* node: anything related to IPC */
  369 #define KERN_DUMMY              31      /* unused */
  370 #define KERN_PS_STRINGS         32      /* int: address of PS_STRINGS */
  371 #define KERN_USRSTACK           33      /* int: address of USRSTACK */
  372 #define KERN_LOGSIGEXIT         34      /* int: do we log sigexit procs? */
  373 #define KERN_IOV_MAX            35      /* int: value of UIO_MAXIOV */
  374 #define KERN_MAXPOSIXLOCKSPERUID 36     /* int: max POSIX locks per uid */
  375 #define KERN_MAXID              37      /* number of valid kern ids */
  376 
  377 #define CTL_KERN_NAMES { \
  378         { 0, 0 }, \
  379         { "ostype", CTLTYPE_STRING }, \
  380         { "osrelease", CTLTYPE_STRING }, \
  381         { "osrevision", CTLTYPE_INT }, \
  382         { "version", CTLTYPE_STRING }, \
  383         { "maxvnodes", CTLTYPE_INT }, \
  384         { "maxproc", CTLTYPE_INT }, \
  385         { "maxfiles", CTLTYPE_INT }, \
  386         { "argmax", CTLTYPE_INT }, \
  387         { "securelevel", CTLTYPE_INT }, \
  388         { "hostname", CTLTYPE_STRING }, \
  389         { "hostid", CTLTYPE_UINT }, \
  390         { "clockrate", CTLTYPE_STRUCT }, \
  391         { "vnode", CTLTYPE_STRUCT }, \
  392         { "proc", CTLTYPE_STRUCT }, \
  393         { "file", CTLTYPE_STRUCT }, \
  394         { "profiling", CTLTYPE_NODE }, \
  395         { "posix1version", CTLTYPE_INT }, \
  396         { "ngroups", CTLTYPE_INT }, \
  397         { "job_control", CTLTYPE_INT }, \
  398         { "saved_ids", CTLTYPE_INT }, \
  399         { "boottime", CTLTYPE_STRUCT }, \
  400         { "nisdomainname", CTLTYPE_STRING }, \
  401         { "update", CTLTYPE_INT }, \
  402         { "osreldate", CTLTYPE_INT }, \
  403         { "ntp_pll", CTLTYPE_NODE }, \
  404         { "bootfile", CTLTYPE_STRING }, \
  405         { "maxfilesperproc", CTLTYPE_INT }, \
  406         { "maxprocperuid", CTLTYPE_INT }, \
  407         { "dumpdev", CTLTYPE_STRUCT }, /* we lie; don't print as int */ \
  408         { "ipc", CTLTYPE_NODE }, \
  409         { "dummy", CTLTYPE_INT }, \
  410         { "ps_strings", CTLTYPE_INT }, \
  411         { "usrstack", CTLTYPE_INT }, \
  412         { "logsigexit", CTLTYPE_INT }, \
  413         { "iov_max", CTLTYPE_INT }, \
  414         { "maxposixlocksperuid", CTLTYPE_INT }, \
  415 }
  416 
  417 /*
  418  * CTL_VFS identifiers
  419  */
  420 #define CTL_VFS_NAMES { \
  421         { "vfsconf", CTLTYPE_STRUCT }, \
  422 }
  423 
  424 /*
  425  * KERN_PROC subtypes
  426  */
  427 #define KERN_PROC_ALL           0       /* everything */
  428 #define KERN_PROC_PID           1       /* by process id */
  429 #define KERN_PROC_PGRP          2       /* by process group id */
  430 #define KERN_PROC_SESSION       3       /* by session of pid */
  431 #define KERN_PROC_TTY           4       /* by controlling tty */
  432 #define KERN_PROC_UID           5       /* by effective uid */
  433 #define KERN_PROC_RUID          6       /* by real uid */
  434 #define KERN_PROC_ARGS          7       /* get/set arguments/proctitle */
  435 #define KERN_PROC_CWD           8       /* get cwd */
  436 
  437 #define KERN_PROC_FLAGMASK      0x10
  438 #define KERN_PROC_FLAG_LWP      0x10
  439 
  440 /*
  441  * KERN_IPC identifiers
  442  */
  443 #define KIPC_MAXSOCKBUF         1       /* int: max size of a socket buffer */
  444 #define KIPC_SOCKBUF_WASTE      2       /* int: wastage factor in sockbuf */
  445 #define KIPC_SOMAXCONN          3       /* int: max length of connection q */
  446 #define KIPC_MAX_LINKHDR        4       /* int: max length of link header */
  447 #define KIPC_MAX_PROTOHDR       5       /* int: max length of network header */
  448 #define KIPC_MAX_HDR            6       /* int: max total length of headers */
  449 #define KIPC_MAX_DATALEN        7       /* int: max length of data? */
  450 #define KIPC_MBSTAT             8       /* struct: mbuf usage statistics */
  451 #define KIPC_NMBCLUSTERS        9       /* int: maximum mbuf clusters */
  452 
  453 /*
  454  * CTL_HW identifiers
  455  */
  456 #define HW_MACHINE       1              /* string: machine class */
  457 #define HW_MODEL         2              /* string: specific machine model */
  458 #define HW_NCPU          3              /* int: number of cpus */
  459 #define HW_BYTEORDER     4              /* int: machine byte order */
  460 #define HW_PHYSMEM       5              /* int: total memory */
  461 #define HW_USERMEM       6              /* int: non-kernel memory */
  462 #define HW_PAGESIZE      7              /* int: software page size */
  463 #define HW_DISKNAMES     8              /* strings: disk drive names */
  464 #define HW_DISKSTATS     9              /* struct: diskstats[] */
  465 #define HW_FLOATINGPT   10              /* int: has HW floating point? */
  466 #define HW_MACHINE_ARCH 11              /* string: machine architecture */
  467 #define HW_MACHINE_PLATFORM 12          /* string: platform architecture */
  468 #define HW_SENSORS      13              /* node: hardware sensors */
  469 #define HW_MAXID        14              /* number of valid hw ids */
  470 
  471 #define CTL_HW_NAMES { \
  472         { 0, 0 }, \
  473         { "machine", CTLTYPE_STRING }, \
  474         { "model", CTLTYPE_STRING }, \
  475         { "ncpu", CTLTYPE_INT }, \
  476         { "byteorder", CTLTYPE_INT }, \
  477         { "physmem", CTLTYPE_ULONG }, \
  478         { "usermem", CTLTYPE_UINT }, \
  479         { "pagesize", CTLTYPE_INT }, \
  480         { "disknames", CTLTYPE_STRUCT }, \
  481         { "diskstats", CTLTYPE_STRUCT }, \
  482         { "floatingpoint", CTLTYPE_INT }, \
  483         { "arch", CTLTYPE_STRING }, \
  484         { "platform", CTLTYPE_STRING }, \
  485         { "sensors", CTLTYPE_NODE }, \
  486 }
  487 
  488 /*
  489  * CTL_USER definitions
  490  */
  491 #define USER_CS_PATH             1      /* string: _CS_PATH */
  492 #define USER_BC_BASE_MAX         2      /* int: BC_BASE_MAX */
  493 #define USER_BC_DIM_MAX          3      /* int: BC_DIM_MAX */
  494 #define USER_BC_SCALE_MAX        4      /* int: BC_SCALE_MAX */
  495 #define USER_BC_STRING_MAX       5      /* int: BC_STRING_MAX */
  496 #define USER_COLL_WEIGHTS_MAX    6      /* int: COLL_WEIGHTS_MAX */
  497 #define USER_EXPR_NEST_MAX       7      /* int: EXPR_NEST_MAX */
  498 #define USER_LINE_MAX            8      /* int: LINE_MAX */
  499 #define USER_RE_DUP_MAX          9      /* int: RE_DUP_MAX */
  500 #define USER_POSIX2_VERSION     10      /* int: POSIX2_VERSION */
  501 #define USER_POSIX2_C_BIND      11      /* int: POSIX2_C_BIND */
  502 #define USER_POSIX2_C_DEV       12      /* int: POSIX2_C_DEV */
  503 #define USER_POSIX2_CHAR_TERM   13      /* int: POSIX2_CHAR_TERM */
  504 #define USER_POSIX2_FORT_DEV    14      /* int: POSIX2_FORT_DEV */
  505 #define USER_POSIX2_FORT_RUN    15      /* int: POSIX2_FORT_RUN */
  506 #define USER_POSIX2_LOCALEDEF   16      /* int: POSIX2_LOCALEDEF */
  507 #define USER_POSIX2_SW_DEV      17      /* int: POSIX2_SW_DEV */
  508 #define USER_POSIX2_UPE         18      /* int: POSIX2_UPE */
  509 #define USER_STREAM_MAX         19      /* int: POSIX2_STREAM_MAX */
  510 #define USER_TZNAME_MAX         20      /* int: POSIX2_TZNAME_MAX */
  511 #define USER_MAXID              21      /* number of valid user ids */
  512 
  513 #define CTL_USER_NAMES { \
  514         { 0, 0 }, \
  515         { "cs_path", CTLTYPE_STRING }, \
  516         { "bc_base_max", CTLTYPE_INT }, \
  517         { "bc_dim_max", CTLTYPE_INT }, \
  518         { "bc_scale_max", CTLTYPE_INT }, \
  519         { "bc_string_max", CTLTYPE_INT }, \
  520         { "coll_weights_max", CTLTYPE_INT }, \
  521         { "expr_nest_max", CTLTYPE_INT }, \
  522         { "line_max", CTLTYPE_INT }, \
  523         { "re_dup_max", CTLTYPE_INT }, \
  524         { "posix2_version", CTLTYPE_INT }, \
  525         { "posix2_c_bind", CTLTYPE_INT }, \
  526         { "posix2_c_dev", CTLTYPE_INT }, \
  527         { "posix2_char_term", CTLTYPE_INT }, \
  528         { "posix2_fort_dev", CTLTYPE_INT }, \
  529         { "posix2_fort_run", CTLTYPE_INT }, \
  530         { "posix2_localedef", CTLTYPE_INT }, \
  531         { "posix2_sw_dev", CTLTYPE_INT }, \
  532         { "posix2_upe", CTLTYPE_INT }, \
  533         { "stream_max", CTLTYPE_INT }, \
  534         { "tzname_max", CTLTYPE_INT }, \
  535 }
  536 
  537 #define CTL_P1003_1B_ASYNCHRONOUS_IO            1       /* boolean */
  538 #define CTL_P1003_1B_MAPPED_FILES               2       /* boolean */
  539 #define CTL_P1003_1B_MEMLOCK                    3       /* boolean */
  540 #define CTL_P1003_1B_MEMLOCK_RANGE              4       /* boolean */
  541 #define CTL_P1003_1B_MEMORY_PROTECTION          5       /* boolean */
  542 #define CTL_P1003_1B_MESSAGE_PASSING            6       /* boolean */
  543 #define CTL_P1003_1B_PRIORITIZED_IO             7       /* boolean */
  544 #define CTL_P1003_1B_PRIORITY_SCHEDULING        8       /* boolean */
  545 #define CTL_P1003_1B_REALTIME_SIGNALS           9       /* boolean */
  546 #define CTL_P1003_1B_SEMAPHORES                 10      /* boolean */
  547 #define CTL_P1003_1B_FSYNC                      11      /* boolean */
  548 #define CTL_P1003_1B_SHARED_MEMORY_OBJECTS      12      /* boolean */
  549 #define CTL_P1003_1B_SYNCHRONIZED_IO            13      /* boolean */
  550 #define CTL_P1003_1B_TIMERS                     14      /* boolean */
  551 #define CTL_P1003_1B_AIO_LISTIO_MAX             15      /* int */
  552 #define CTL_P1003_1B_AIO_MAX                    16      /* int */
  553 #define CTL_P1003_1B_AIO_PRIO_DELTA_MAX         17      /* int */
  554 #define CTL_P1003_1B_DELAYTIMER_MAX             18      /* int */
  555 #define CTL_P1003_1B_UNUSED1                    19      /* int */
  556 #define CTL_P1003_1B_PAGESIZE                   20      /* int */
  557 #define CTL_P1003_1B_RTSIG_MAX                  21      /* int */
  558 #define CTL_P1003_1B_SEM_NSEMS_MAX              22      /* int */
  559 #define CTL_P1003_1B_SEM_VALUE_MAX              23      /* int */
  560 #define CTL_P1003_1B_SIGQUEUE_MAX               24      /* int */
  561 #define CTL_P1003_1B_TIMER_MAX                  25      /* int */
  562 
  563 #define CTL_P1003_1B_MAXID              26
  564 
  565 #define CTL_P1003_1B_NAMES { \
  566         { 0, 0 }, \
  567         { "asynchronous_io", CTLTYPE_INT }, \
  568         { "mapped_files", CTLTYPE_INT }, \
  569         { "memlock", CTLTYPE_INT }, \
  570         { "memlock_range", CTLTYPE_INT }, \
  571         { "memory_protection", CTLTYPE_INT }, \
  572         { "message_passing", CTLTYPE_INT }, \
  573         { "prioritized_io", CTLTYPE_INT }, \
  574         { "priority_scheduling", CTLTYPE_INT }, \
  575         { "realtime_signals", CTLTYPE_INT }, \
  576         { "semaphores", CTLTYPE_INT }, \
  577         { "fsync", CTLTYPE_INT }, \
  578         { "shared_memory_objects", CTLTYPE_INT }, \
  579         { "synchronized_io", CTLTYPE_INT }, \
  580         { "timers", CTLTYPE_INT }, \
  581         { "aio_listio_max", CTLTYPE_INT }, \
  582         { "aio_max", CTLTYPE_INT }, \
  583         { "aio_prio_delta_max", CTLTYPE_INT }, \
  584         { "delaytimer_max", CTLTYPE_INT }, \
  585         { "unused1", CTLTYPE_INT }, \
  586         { "pagesize", CTLTYPE_INT }, \
  587         { "rtsig_max", CTLTYPE_INT }, \
  588         { "nsems_max", CTLTYPE_INT }, \
  589         { "sem_value_max", CTLTYPE_INT }, \
  590         { "sigqueue_max", CTLTYPE_INT }, \
  591         { "timer_max", CTLTYPE_INT }, \
  592 }
  593 
  594 #ifdef _KERNEL
  595 
  596 /*
  597  * Declare some common oids.
  598  */
  599 extern struct sysctl_oid_list sysctl__children;
  600 SYSCTL_DECL(_kern);
  601 SYSCTL_DECL(_sysctl);
  602 SYSCTL_DECL(_vm);
  603 SYSCTL_DECL(_vfs);
  604 SYSCTL_DECL(_net);
  605 SYSCTL_DECL(_debug);
  606 SYSCTL_DECL(_debug_sizeof);
  607 SYSCTL_DECL(_hw);
  608 SYSCTL_DECL(_hw_bus);
  609 SYSCTL_DECL(_machdep);
  610 SYSCTL_DECL(_user);
  611 SYSCTL_DECL(_compat);
  612 SYSCTL_DECL(_lwkt);
  613 SYSCTL_DECL(_security);
  614 SYSCTL_DECL(_dsched);
  615 
  616 /*
  617  * Common second-level oids.
  618  */
  619 SYSCTL_DECL(_kern_ipc);
  620 
  621 extern char     machine[];
  622 extern char     osrelease[];
  623 extern char     ostype[];
  624 extern char     kern_ident[];
  625 
  626 /* Dynamic oid handling */
  627 struct sysctl_oid *sysctl_add_oid(struct sysctl_ctx_list *clist,
  628                 struct sysctl_oid_list *parent, int nbr, const char *name,
  629                 int kind, void *arg1, int arg2,
  630                 int (*handler) (SYSCTL_HANDLER_ARGS),
  631                 const char *fmt, const char *descr);
  632 int     sysctl_remove_oid(struct sysctl_oid *oidp, int del, int recurse);
  633 int     sysctl_ctx_init(struct sysctl_ctx_list *clist);
  634 int     sysctl_ctx_free(struct sysctl_ctx_list *clist);
  635 struct  sysctl_ctx_entry *sysctl_ctx_entry_add(struct sysctl_ctx_list *clist,
  636                 struct sysctl_oid *oidp);
  637 struct  sysctl_ctx_entry *sysctl_ctx_entry_find(struct sysctl_ctx_list *clist,
  638                 struct sysctl_oid *oidp);
  639 int     sysctl_ctx_entry_del(struct sysctl_ctx_list *clist,
  640                 struct sysctl_oid *oidp);
  641 
  642 int     kernel_sysctl(int *name, u_int namelen, void *old,
  643                       size_t *oldlenp, void *new, size_t newlen,
  644                       size_t *retval);
  645 int     kernel_sysctlbyname(char *name,
  646                 void *old, size_t *oldlenp, void *new, size_t newlen,
  647                 size_t *retval);
  648 int     userland_sysctl(int *name, u_int namelen, void *old,
  649                         size_t *oldlenp, int inkernel, void *new, size_t newlen,
  650                         size_t *retval);
  651 int     sysctl_find_oid(int *name, u_int namelen, struct sysctl_oid **noid,
  652                         int *nindx, struct sysctl_req *req);
  653 
  654 int     sysctl_int_range(SYSCTL_HANDLER_ARGS, int low, int high);
  655 
  656 #endif  /* _KERNEL */
  657 
  658 #if !defined(_KERNEL) || defined(_KERNEL_VIRTUAL)
  659 
  660 #include <sys/cdefs.h>
  661 
  662 __BEGIN_DECLS
  663 int     sysctl(const int *, u_int, void *, size_t *, const void *, size_t);
  664 int     sysctlbyname(const char *, void *, size_t *, const void *, size_t);
  665 int     sysctlnametomib (const char *, int *, size_t *);
  666 __END_DECLS
  667 
  668 #endif  /* _KERNEL && _KERNEL_VIRTUAL */
  669 
  670 #endif  /* !_SYS_SYSCTL_H_ */

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