The Design and Implementation of the FreeBSD Operating System, Second Edition
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  * $FreeBSD$
   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_QUAD    4       /* name describes a 64-bit number */
   70 #define CTLTYPE_OPAQUE  5       /* name describes a structure */
   71 #define CTLTYPE_STRUCT  CTLTYPE_OPAQUE  /* name describes a structure */
   72 #define CTLTYPE_UINT    6       /* name describes an unsigned integer */
   73 #define CTLTYPE_LONG    7       /* name describes a long */
   74 #define CTLTYPE_ULONG   8       /* name describes an unsigned long */
   75 
   76 #define CTLFLAG_RD      0x80000000      /* Allow reads of variable */
   77 #define CTLFLAG_WR      0x40000000      /* Allow writes to the variable */
   78 #define CTLFLAG_RW      (CTLFLAG_RD|CTLFLAG_WR)
   79 #define CTLFLAG_NOLOCK  0x20000000      /* XXX Don't Lock */
   80 #define CTLFLAG_ANYBODY 0x10000000      /* All users can set this var */
   81 #define CTLFLAG_SECURE  0x08000000      /* Permit set only if securelevel<=0 */
   82 #define CTLFLAG_PRISON  0x04000000      /* Prisoned roots can fiddle */
   83 #define CTLFLAG_DYN     0x02000000      /* Dynamic oid - can be freed */
   84 #define CTLFLAG_SKIP    0x01000000      /* Skip this sysctl when listing */
   85 #define CTLMASK_SECURE  0x00F00000      /* Secure level */
   86 #define CTLFLAG_TUN     0x00080000      /* Tunable variable */
   87 #define CTLFLAG_RDTUN   (CTLFLAG_RD|CTLFLAG_TUN)
   88 
   89 /*
   90  * Secure level.   Note that CTLFLAG_SECURE == CTLFLAG_SECURE1.  
   91  *
   92  * Secure when the securelevel is raised to at least N.
   93  */
   94 #define CTLSHIFT_SECURE 20
   95 #define CTLFLAG_SECURE1 (CTLFLAG_SECURE | (0 << CTLSHIFT_SECURE))
   96 #define CTLFLAG_SECURE2 (CTLFLAG_SECURE | (1 << CTLSHIFT_SECURE))
   97 #define CTLFLAG_SECURE3 (CTLFLAG_SECURE | (2 << CTLSHIFT_SECURE))
   98 
   99 /*
  100  * USE THIS instead of a hardwired number from the categories below
  101  * to get dynamically assigned sysctl entries using the linker-set
  102  * technology. This is the way nearly all new sysctl variables should
  103  * be implemented.
  104  * e.g. SYSCTL_INT(_parent, OID_AUTO, name, CTLFLAG_RW, &variable, 0, "");
  105  */ 
  106 #define OID_AUTO        (-1)
  107 
  108 /*
  109  * The starting number for dynamically-assigned entries.  WARNING!
  110  * ALL static sysctl entries should have numbers LESS than this!
  111  */
  112 #define CTL_AUTO_START  0x100
  113 
  114 #ifdef _KERNEL
  115 #define SYSCTL_HANDLER_ARGS struct sysctl_oid *oidp, void *arg1, int arg2, \
  116         struct sysctl_req *req
  117 
  118 /* definitions for sysctl_req 'lock' member */
  119 #define REQ_UNLOCKED    0       /* not locked and not wired */
  120 #define REQ_LOCKED      1       /* locked and not wired */
  121 #define REQ_WIRED       2       /* locked and wired */
  122 
  123 /*
  124  * This describes the access space for a sysctl request.  This is needed
  125  * so that we can use the interface from the kernel or from user-space.
  126  */
  127 struct sysctl_req {
  128         struct thread   *td;            /* used for access checking */
  129         int             lock;           /* locking/wiring state */
  130         void            *oldptr;
  131         size_t          oldlen;
  132         size_t          oldidx;
  133         int             (*oldfunc)(struct sysctl_req *, const void *, size_t);
  134         void            *newptr;
  135         size_t          newlen;
  136         size_t          newidx;
  137         int             (*newfunc)(struct sysctl_req *, void *, size_t);
  138         size_t          validlen;
  139 };
  140 
  141 SLIST_HEAD(sysctl_oid_list, sysctl_oid);
  142 
  143 /*
  144  * This describes one "oid" in the MIB tree.  Potentially more nodes can
  145  * be hidden behind it, expanded by the handler.
  146  */
  147 struct sysctl_oid {
  148         struct sysctl_oid_list *oid_parent;
  149         SLIST_ENTRY(sysctl_oid) oid_link;
  150         int             oid_number;
  151         u_int           oid_kind;
  152         void            *oid_arg1;
  153         int             oid_arg2;
  154         const char      *oid_name;
  155         int             (*oid_handler)(SYSCTL_HANDLER_ARGS);
  156         const char      *oid_fmt;
  157         int             oid_refcnt;
  158         const char      *descr;
  159 };
  160 
  161 #define SYSCTL_IN(r, p, l) (r->newfunc)(r, p, l)
  162 #define SYSCTL_OUT(r, p, l) (r->oldfunc)(r, p, l)
  163 
  164 int sysctl_handle_int(SYSCTL_HANDLER_ARGS);
  165 int sysctl_handle_long(SYSCTL_HANDLER_ARGS);
  166 int sysctl_handle_intptr(SYSCTL_HANDLER_ARGS);
  167 int sysctl_handle_string(SYSCTL_HANDLER_ARGS);
  168 int sysctl_handle_opaque(SYSCTL_HANDLER_ARGS);
  169 
  170 /*
  171  * These functions are used to add/remove an oid from the mib.
  172  */
  173 void sysctl_register_oid(struct sysctl_oid *oidp);
  174 void sysctl_unregister_oid(struct sysctl_oid *oidp);
  175 
  176 /* Declare a static oid to allow child oids to be added to it. */
  177 #define SYSCTL_DECL(name)                                       \
  178         extern struct sysctl_oid_list sysctl_##name##_children
  179 
  180 /* Hide these in macros */
  181 #define SYSCTL_CHILDREN(oid_ptr) (struct sysctl_oid_list *) \
  182         (oid_ptr)->oid_arg1
  183 #define SYSCTL_CHILDREN_SET(oid_ptr, val) \
  184         (oid_ptr)->oid_arg1 = (val);
  185 #define SYSCTL_STATIC_CHILDREN(oid_name) \
  186         (&sysctl_##oid_name##_children)
  187 
  188 /* === Structs and macros related to context handling === */
  189 
  190 /* All dynamically created sysctls can be tracked in a context list. */
  191 struct sysctl_ctx_entry {
  192         struct sysctl_oid *entry;
  193         TAILQ_ENTRY(sysctl_ctx_entry) link;
  194 };
  195 
  196 TAILQ_HEAD(sysctl_ctx_list, sysctl_ctx_entry);
  197 
  198 #define SYSCTL_NODE_CHILDREN(parent, name) \
  199         sysctl_##parent##_##name##_children
  200 
  201 /* This constructs a "raw" MIB oid. */
  202 #define SYSCTL_OID(parent, nbr, name, kind, a1, a2, handler, fmt, descr) \
  203         static struct sysctl_oid sysctl__##parent##_##name = {           \
  204                 &sysctl_##parent##_children, { 0 },                      \
  205                 nbr, kind, a1, a2, #name, handler, fmt, 0, descr };      \
  206         DATA_SET(sysctl_set, sysctl__##parent##_##name)
  207 
  208 #define SYSCTL_ADD_OID(ctx, parent, nbr, name, kind, a1, a2, handler, fmt, descr) \
  209         sysctl_add_oid(ctx, parent, nbr, name, kind, a1, a2, handler, fmt, descr)
  210 
  211 /* This constructs a node from which other oids can hang. */
  212 #define SYSCTL_NODE(parent, nbr, name, access, handler, descr)              \
  213         struct sysctl_oid_list SYSCTL_NODE_CHILDREN(parent, name);          \
  214         SYSCTL_OID(parent, nbr, name, CTLTYPE_NODE|(access),                \
  215                    (void*)&SYSCTL_NODE_CHILDREN(parent, name), 0, handler, \
  216                    "N", descr)
  217 
  218 #define SYSCTL_ADD_NODE(ctx, parent, nbr, name, access, handler, descr)     \
  219         sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_NODE|(access),       \
  220         0, 0, handler, "N", descr)
  221 
  222 /* Oid for a string.  len can be 0 to indicate '\0' termination. */
  223 #define SYSCTL_STRING(parent, nbr, name, access, arg, len, descr) \
  224         SYSCTL_OID(parent, nbr, name, CTLTYPE_STRING|(access), \
  225                 arg, len, sysctl_handle_string, "A", descr)
  226 
  227 #define SYSCTL_ADD_STRING(ctx, parent, nbr, name, access, arg, len, descr)  \
  228         sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_STRING|(access),     \
  229         arg, len, sysctl_handle_string, "A", descr)
  230 
  231 /* Oid for an int.  If ptr is NULL, val is returned. */
  232 #define SYSCTL_INT(parent, nbr, name, access, ptr, val, descr) \
  233         SYSCTL_OID(parent, nbr, name, CTLTYPE_INT|(access), \
  234                 ptr, val, sysctl_handle_int, "I", descr)
  235 
  236 #define SYSCTL_ADD_INT(ctx, parent, nbr, name, access, ptr, val, descr)     \
  237         sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_INT|(access),        \
  238         ptr, val, sysctl_handle_int, "I", 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 an unsigned 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               /* filesystem, 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_MAXID       10              /* number of valid top-level ids */
  311 
  312 #define CTL_NAMES { \
  313         { 0, 0 }, \
  314         { "kern", CTLTYPE_NODE }, \
  315         { "vm", CTLTYPE_NODE }, \
  316         { "vfs", CTLTYPE_NODE }, \
  317         { "net", CTLTYPE_NODE }, \
  318         { "debug", CTLTYPE_NODE }, \
  319         { "hw", CTLTYPE_NODE }, \
  320         { "machdep", CTLTYPE_NODE }, \
  321         { "user", CTLTYPE_NODE }, \
  322         { "p1003_1b", CTLTYPE_NODE }, \
  323 }
  324 
  325 /*
  326  * CTL_KERN identifiers
  327  */
  328 #define KERN_OSTYPE              1      /* string: system version */
  329 #define KERN_OSRELEASE           2      /* string: system release */
  330 #define KERN_OSREV               3      /* int: system revision */
  331 #define KERN_VERSION             4      /* string: compile time info */
  332 #define KERN_MAXVNODES           5      /* int: max vnodes */
  333 #define KERN_MAXPROC             6      /* int: max processes */
  334 #define KERN_MAXFILES            7      /* int: max open files */
  335 #define KERN_ARGMAX              8      /* int: max arguments to exec */
  336 #define KERN_SECURELVL           9      /* int: system security level */
  337 #define KERN_HOSTNAME           10      /* string: hostname */
  338 #define KERN_HOSTID             11      /* int: host identifier */
  339 #define KERN_CLOCKRATE          12      /* struct: struct clockrate */
  340 #define KERN_VNODE              13      /* struct: vnode structures */
  341 #define KERN_PROC               14      /* struct: process entries */
  342 #define KERN_FILE               15      /* struct: file entries */
  343 #define KERN_PROF               16      /* node: kernel profiling info */
  344 #define KERN_POSIX1             17      /* int: POSIX.1 version */
  345 #define KERN_NGROUPS            18      /* int: # of supplemental group ids */
  346 #define KERN_JOB_CONTROL        19      /* int: is job control available */
  347 #define KERN_SAVED_IDS          20      /* int: saved set-user/group-ID */
  348 #define KERN_BOOTTIME           21      /* struct: time kernel was booted */
  349 #define KERN_NISDOMAINNAME      22      /* string: YP domain name */
  350 #define KERN_UPDATEINTERVAL     23      /* int: update process sleep time */
  351 #define KERN_OSRELDATE          24      /* int: kernel release date */
  352 #define KERN_NTP_PLL            25      /* node: NTP PLL control */
  353 #define KERN_BOOTFILE           26      /* string: name of booted kernel */
  354 #define KERN_MAXFILESPERPROC    27      /* int: max open files per proc */
  355 #define KERN_MAXPROCPERUID      28      /* int: max processes per uid */
  356 #define KERN_DUMPDEV            29      /* struct cdev *: device to dump on */
  357 #define KERN_IPC                30      /* node: anything related to IPC */
  358 #define KERN_DUMMY              31      /* unused */
  359 #define KERN_PS_STRINGS         32      /* int: address of PS_STRINGS */
  360 #define KERN_USRSTACK           33      /* int: address of USRSTACK */
  361 #define KERN_LOGSIGEXIT         34      /* int: do we log sigexit procs? */
  362 #define KERN_IOV_MAX            35      /* int: value of UIO_MAXIOV */
  363 #define KERN_MAXID              36      /* number of valid kern ids */
  364 
  365 #define CTL_KERN_NAMES { \
  366         { 0, 0 }, \
  367         { "ostype", CTLTYPE_STRING }, \
  368         { "osrelease", CTLTYPE_STRING }, \
  369         { "osrevision", CTLTYPE_INT }, \
  370         { "version", CTLTYPE_STRING }, \
  371         { "maxvnodes", CTLTYPE_INT }, \
  372         { "maxproc", CTLTYPE_INT }, \
  373         { "maxfiles", CTLTYPE_INT }, \
  374         { "argmax", CTLTYPE_INT }, \
  375         { "securelevel", CTLTYPE_INT }, \
  376         { "hostname", CTLTYPE_STRING }, \
  377         { "hostid", CTLTYPE_UINT }, \
  378         { "clockrate", CTLTYPE_STRUCT }, \
  379         { "vnode", CTLTYPE_STRUCT }, \
  380         { "proc", CTLTYPE_STRUCT }, \
  381         { "file", CTLTYPE_STRUCT }, \
  382         { "profiling", CTLTYPE_NODE }, \
  383         { "posix1version", CTLTYPE_INT }, \
  384         { "ngroups", CTLTYPE_INT }, \
  385         { "job_control", CTLTYPE_INT }, \
  386         { "saved_ids", CTLTYPE_INT }, \
  387         { "boottime", CTLTYPE_STRUCT }, \
  388         { "nisdomainname", CTLTYPE_STRING }, \
  389         { "update", CTLTYPE_INT }, \
  390         { "osreldate", CTLTYPE_INT }, \
  391         { "ntp_pll", CTLTYPE_NODE }, \
  392         { "bootfile", CTLTYPE_STRING }, \
  393         { "maxfilesperproc", CTLTYPE_INT }, \
  394         { "maxprocperuid", CTLTYPE_INT }, \
  395         { "ipc", CTLTYPE_NODE }, \
  396         { "dummy", CTLTYPE_INT }, \
  397         { "ps_strings", CTLTYPE_INT }, \
  398         { "usrstack", CTLTYPE_INT }, \
  399         { "logsigexit", CTLTYPE_INT }, \
  400         { "iov_max", CTLTYPE_INT }, \
  401 }
  402 
  403 /*
  404  * CTL_VFS identifiers
  405  */
  406 #define CTL_VFS_NAMES { \
  407         { "vfsconf", CTLTYPE_STRUCT }, \
  408 }
  409 
  410 /*
  411  * KERN_PROC subtypes
  412  */
  413 #define KERN_PROC_ALL           0       /* everything */
  414 #define KERN_PROC_PID           1       /* by process id */
  415 #define KERN_PROC_PGRP          2       /* by process group id */
  416 #define KERN_PROC_SESSION       3       /* by session of pid */
  417 #define KERN_PROC_TTY           4       /* by controlling tty */
  418 #define KERN_PROC_UID           5       /* by effective uid */
  419 #define KERN_PROC_RUID          6       /* by real uid */
  420 #define KERN_PROC_ARGS          7       /* get/set arguments/proctitle */
  421 #define KERN_PROC_PROC          8       /* only return procs */
  422 #define KERN_PROC_SV_NAME       9       /* get syscall vector name */
  423 #define KERN_PROC_RGID          10      /* by real group id */
  424 #define KERN_PROC_GID           11      /* by effective group id */
  425 #define KERN_PROC_INC_THREAD    0x10    /*
  426                                          * modifier for pid, pgrp, tty,
  427                                          * uid, ruid, gid, rgid and proc
  428                                          */
  429 
  430 /*
  431  * KERN_IPC identifiers
  432  */
  433 #define KIPC_MAXSOCKBUF         1       /* int: max size of a socket buffer */
  434 #define KIPC_SOCKBUF_WASTE      2       /* int: wastage factor in sockbuf */
  435 #define KIPC_SOMAXCONN          3       /* int: max length of connection q */
  436 #define KIPC_MAX_LINKHDR        4       /* int: max length of link header */
  437 #define KIPC_MAX_PROTOHDR       5       /* int: max length of network header */
  438 #define KIPC_MAX_HDR            6       /* int: max total length of headers */
  439 #define KIPC_MAX_DATALEN        7       /* int: max length of data? */
  440 
  441 /*
  442  * CTL_HW identifiers
  443  */
  444 #define HW_MACHINE       1              /* string: machine class */
  445 #define HW_MODEL         2              /* string: specific machine model */
  446 #define HW_NCPU          3              /* int: number of cpus */
  447 #define HW_BYTEORDER     4              /* int: machine byte order */
  448 #define HW_PHYSMEM       5              /* int: total memory */
  449 #define HW_USERMEM       6              /* int: non-kernel memory */
  450 #define HW_PAGESIZE      7              /* int: software page size */
  451 #define HW_DISKNAMES     8              /* strings: disk drive names */
  452 #define HW_DISKSTATS     9              /* struct: diskstats[] */
  453 #define HW_FLOATINGPT   10              /* int: has HW floating point? */
  454 #define HW_MACHINE_ARCH 11              /* string: machine architecture */
  455 #define HW_MAXID        12              /* number of valid hw ids */
  456 #define HW_REALMEM      13              /* int: 'real' memory */
  457 
  458 #define CTL_HW_NAMES { \
  459         { 0, 0 }, \
  460         { "machine", CTLTYPE_STRING }, \
  461         { "model", CTLTYPE_STRING }, \
  462         { "ncpu", CTLTYPE_INT }, \
  463         { "byteorder", CTLTYPE_INT }, \
  464         { "physmem", CTLTYPE_ULONG }, \
  465         { "usermem", CTLTYPE_ULONG }, \
  466         { "pagesize", CTLTYPE_INT }, \
  467         { "disknames", CTLTYPE_STRUCT }, \
  468         { "diskstats", CTLTYPE_STRUCT }, \
  469         { "floatingpoint", CTLTYPE_INT }, \
  470         { "realmem", CTLTYPE_ULONG }, \
  471 }
  472 
  473 /*
  474  * CTL_USER definitions
  475  */
  476 #define USER_CS_PATH             1      /* string: _CS_PATH */
  477 #define USER_BC_BASE_MAX         2      /* int: BC_BASE_MAX */
  478 #define USER_BC_DIM_MAX          3      /* int: BC_DIM_MAX */
  479 #define USER_BC_SCALE_MAX        4      /* int: BC_SCALE_MAX */
  480 #define USER_BC_STRING_MAX       5      /* int: BC_STRING_MAX */
  481 #define USER_COLL_WEIGHTS_MAX    6      /* int: COLL_WEIGHTS_MAX */
  482 #define USER_EXPR_NEST_MAX       7      /* int: EXPR_NEST_MAX */
  483 #define USER_LINE_MAX            8      /* int: LINE_MAX */
  484 #define USER_RE_DUP_MAX          9      /* int: RE_DUP_MAX */
  485 #define USER_POSIX2_VERSION     10      /* int: POSIX2_VERSION */
  486 #define USER_POSIX2_C_BIND      11      /* int: POSIX2_C_BIND */
  487 #define USER_POSIX2_C_DEV       12      /* int: POSIX2_C_DEV */
  488 #define USER_POSIX2_CHAR_TERM   13      /* int: POSIX2_CHAR_TERM */
  489 #define USER_POSIX2_FORT_DEV    14      /* int: POSIX2_FORT_DEV */
  490 #define USER_POSIX2_FORT_RUN    15      /* int: POSIX2_FORT_RUN */
  491 #define USER_POSIX2_LOCALEDEF   16      /* int: POSIX2_LOCALEDEF */
  492 #define USER_POSIX2_SW_DEV      17      /* int: POSIX2_SW_DEV */
  493 #define USER_POSIX2_UPE         18      /* int: POSIX2_UPE */
  494 #define USER_STREAM_MAX         19      /* int: POSIX2_STREAM_MAX */
  495 #define USER_TZNAME_MAX         20      /* int: POSIX2_TZNAME_MAX */
  496 #define USER_MAXID              21      /* number of valid user ids */
  497 
  498 #define CTL_USER_NAMES { \
  499         { 0, 0 }, \
  500         { "cs_path", CTLTYPE_STRING }, \
  501         { "bc_base_max", CTLTYPE_INT }, \
  502         { "bc_dim_max", CTLTYPE_INT }, \
  503         { "bc_scale_max", CTLTYPE_INT }, \
  504         { "bc_string_max", CTLTYPE_INT }, \
  505         { "coll_weights_max", CTLTYPE_INT }, \
  506         { "expr_nest_max", CTLTYPE_INT }, \
  507         { "line_max", CTLTYPE_INT }, \
  508         { "re_dup_max", CTLTYPE_INT }, \
  509         { "posix2_version", CTLTYPE_INT }, \
  510         { "posix2_c_bind", CTLTYPE_INT }, \
  511         { "posix2_c_dev", CTLTYPE_INT }, \
  512         { "posix2_char_term", CTLTYPE_INT }, \
  513         { "posix2_fort_dev", CTLTYPE_INT }, \
  514         { "posix2_fort_run", CTLTYPE_INT }, \
  515         { "posix2_localedef", CTLTYPE_INT }, \
  516         { "posix2_sw_dev", CTLTYPE_INT }, \
  517         { "posix2_upe", CTLTYPE_INT }, \
  518         { "stream_max", CTLTYPE_INT }, \
  519         { "tzname_max", CTLTYPE_INT }, \
  520 }
  521 
  522 #define CTL_P1003_1B_ASYNCHRONOUS_IO            1       /* boolean */
  523 #define CTL_P1003_1B_MAPPED_FILES               2       /* boolean */
  524 #define CTL_P1003_1B_MEMLOCK                    3       /* boolean */
  525 #define CTL_P1003_1B_MEMLOCK_RANGE              4       /* boolean */
  526 #define CTL_P1003_1B_MEMORY_PROTECTION          5       /* boolean */
  527 #define CTL_P1003_1B_MESSAGE_PASSING            6       /* boolean */
  528 #define CTL_P1003_1B_PRIORITIZED_IO             7       /* boolean */
  529 #define CTL_P1003_1B_PRIORITY_SCHEDULING        8       /* boolean */
  530 #define CTL_P1003_1B_REALTIME_SIGNALS           9       /* boolean */
  531 #define CTL_P1003_1B_SEMAPHORES                 10      /* boolean */
  532 #define CTL_P1003_1B_FSYNC                      11      /* boolean */
  533 #define CTL_P1003_1B_SHARED_MEMORY_OBJECTS      12      /* boolean */
  534 #define CTL_P1003_1B_SYNCHRONIZED_IO            13      /* boolean */
  535 #define CTL_P1003_1B_TIMERS                     14      /* boolean */
  536 #define CTL_P1003_1B_AIO_LISTIO_MAX             15      /* int */
  537 #define CTL_P1003_1B_AIO_MAX                    16      /* int */
  538 #define CTL_P1003_1B_AIO_PRIO_DELTA_MAX         17      /* int */
  539 #define CTL_P1003_1B_DELAYTIMER_MAX             18      /* int */
  540 #define CTL_P1003_1B_MQ_OPEN_MAX                19      /* int */
  541 #define CTL_P1003_1B_PAGESIZE                   20      /* int */
  542 #define CTL_P1003_1B_RTSIG_MAX                  21      /* int */
  543 #define CTL_P1003_1B_SEM_NSEMS_MAX              22      /* int */
  544 #define CTL_P1003_1B_SEM_VALUE_MAX              23      /* int */
  545 #define CTL_P1003_1B_SIGQUEUE_MAX               24      /* int */
  546 #define CTL_P1003_1B_TIMER_MAX                  25      /* int */
  547 
  548 #define CTL_P1003_1B_MAXID              26
  549 
  550 #define CTL_P1003_1B_NAMES { \
  551         { 0, 0 }, \
  552         { "asynchronous_io", CTLTYPE_INT }, \
  553         { "mapped_files", CTLTYPE_INT }, \
  554         { "memlock", CTLTYPE_INT }, \
  555         { "memlock_range", CTLTYPE_INT }, \
  556         { "memory_protection", CTLTYPE_INT }, \
  557         { "message_passing", CTLTYPE_INT }, \
  558         { "prioritized_io", CTLTYPE_INT }, \
  559         { "priority_scheduling", CTLTYPE_INT }, \
  560         { "realtime_signals", CTLTYPE_INT }, \
  561         { "semaphores", CTLTYPE_INT }, \
  562         { "fsync", CTLTYPE_INT }, \
  563         { "shared_memory_objects", CTLTYPE_INT }, \
  564         { "synchronized_io", CTLTYPE_INT }, \
  565         { "timers", CTLTYPE_INT }, \
  566         { "aio_listio_max", CTLTYPE_INT }, \
  567         { "aio_max", CTLTYPE_INT }, \
  568         { "aio_prio_delta_max", CTLTYPE_INT }, \
  569         { "delaytimer_max", CTLTYPE_INT }, \
  570         { "mq_open_max", CTLTYPE_INT }, \
  571         { "pagesize", CTLTYPE_INT }, \
  572         { "rtsig_max", CTLTYPE_INT }, \
  573         { "nsems_max", CTLTYPE_INT }, \
  574         { "sem_value_max", CTLTYPE_INT }, \
  575         { "sigqueue_max", CTLTYPE_INT }, \
  576         { "timer_max", CTLTYPE_INT }, \
  577 }
  578 
  579 #ifdef _KERNEL
  580 
  581 /*
  582  * Declare some common oids.
  583  */
  584 extern struct sysctl_oid_list sysctl__children;
  585 SYSCTL_DECL(_kern);
  586 SYSCTL_DECL(_sysctl);
  587 SYSCTL_DECL(_vm);
  588 SYSCTL_DECL(_vfs);
  589 SYSCTL_DECL(_net);
  590 SYSCTL_DECL(_debug);
  591 SYSCTL_DECL(_debug_sizeof);
  592 SYSCTL_DECL(_hw);
  593 SYSCTL_DECL(_machdep);
  594 SYSCTL_DECL(_user);
  595 SYSCTL_DECL(_compat);
  596 
  597 extern char     machine[];
  598 extern char     osrelease[];
  599 extern char     ostype[];
  600 extern char     kern_ident[];
  601 
  602 /* Dynamic oid handling */
  603 struct sysctl_oid *sysctl_add_oid(struct sysctl_ctx_list *clist,
  604                 struct sysctl_oid_list *parent, int nbr, const char *name,
  605                 int kind, void *arg1, int arg2,
  606                 int (*handler) (SYSCTL_HANDLER_ARGS),
  607                 const char *fmt, const char *descr);
  608 int     sysctl_move_oid(struct sysctl_oid *oidp,
  609                 struct sysctl_oid_list *parent);
  610 int     sysctl_remove_oid(struct sysctl_oid *oidp, int del, int recurse);
  611 int     sysctl_ctx_init(struct sysctl_ctx_list *clist);
  612 int     sysctl_ctx_free(struct sysctl_ctx_list *clist);
  613 struct  sysctl_ctx_entry *sysctl_ctx_entry_add(struct sysctl_ctx_list *clist,
  614                 struct sysctl_oid *oidp);
  615 struct  sysctl_ctx_entry *sysctl_ctx_entry_find(struct sysctl_ctx_list *clist,
  616                 struct sysctl_oid *oidp);
  617 int     sysctl_ctx_entry_del(struct sysctl_ctx_list *clist,
  618                 struct sysctl_oid *oidp);
  619 
  620 int     kernel_sysctl(struct thread *td, int *name, u_int namelen, void *old,
  621                       size_t *oldlenp, void *new, size_t newlen,
  622                       size_t *retval);
  623 int     kernel_sysctlbyname(struct thread *td, char *name,
  624                 void *old, size_t *oldlenp, void *new, size_t newlen,
  625                 size_t *retval);
  626 int     userland_sysctl(struct thread *td, int *name, u_int namelen, void *old,
  627                         size_t *oldlenp, int inkernel, void *new, size_t newlen,
  628                         size_t *retval);
  629 int     sysctl_find_oid(int *name, u_int namelen, struct sysctl_oid **noid,
  630                         int *nindx, struct sysctl_req *req);
  631 int     sysctl_wire_old_buffer(struct sysctl_req *req, size_t len);
  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_ */

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