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: releng/8.1/sys/sys/sysctl.h 199583 2009-11-20 15:27:52Z jhb $
   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_MPSAFE  0x00040000      /* Handler is MP safe */
   88 #define CTLFLAG_VNET    0x00020000      /* Prisons with vnet can fiddle */
   89 #define CTLFLAG_RDTUN   (CTLFLAG_RD|CTLFLAG_TUN)
   90 
   91 /*
   92  * Secure level.   Note that CTLFLAG_SECURE == CTLFLAG_SECURE1.  
   93  *
   94  * Secure when the securelevel is raised to at least N.
   95  */
   96 #define CTLSHIFT_SECURE 20
   97 #define CTLFLAG_SECURE1 (CTLFLAG_SECURE | (0 << CTLSHIFT_SECURE))
   98 #define CTLFLAG_SECURE2 (CTLFLAG_SECURE | (1 << CTLSHIFT_SECURE))
   99 #define CTLFLAG_SECURE3 (CTLFLAG_SECURE | (2 << CTLSHIFT_SECURE))
  100 
  101 /*
  102  * USE THIS instead of a hardwired number from the categories below
  103  * to get dynamically assigned sysctl entries using the linker-set
  104  * technology. This is the way nearly all new sysctl variables should
  105  * be implemented.
  106  * e.g. SYSCTL_INT(_parent, OID_AUTO, name, CTLFLAG_RW, &variable, 0, "");
  107  */ 
  108 #define OID_AUTO        (-1)
  109 
  110 /*
  111  * The starting number for dynamically-assigned entries.  WARNING!
  112  * ALL static sysctl entries should have numbers LESS than this!
  113  */
  114 #define CTL_AUTO_START  0x100
  115 
  116 #ifdef _KERNEL
  117 #define SYSCTL_HANDLER_ARGS struct sysctl_oid *oidp, void *arg1, int arg2, \
  118         struct sysctl_req *req
  119 
  120 /* definitions for sysctl_req 'lock' member */
  121 #define REQ_UNLOCKED    0       /* not locked and not wired */
  122 #define REQ_LOCKED      1       /* locked and not wired */
  123 #define REQ_WIRED       2       /* locked and wired */
  124 
  125 /* definitions for sysctl_req 'flags' member */
  126 #if defined(__amd64__) || defined(__ia64__)
  127 #define SCTL_MASK32     1       /* 32 bit emulation */
  128 #endif
  129 
  130 /*
  131  * This describes the access space for a sysctl request.  This is needed
  132  * so that we can use the interface from the kernel or from user-space.
  133  */
  134 struct sysctl_req {
  135         struct thread   *td;            /* used for access checking */
  136         int             lock;           /* locking/wiring state */
  137         void            *oldptr;
  138         size_t          oldlen;
  139         size_t          oldidx;
  140         int             (*oldfunc)(struct sysctl_req *, const void *, size_t);
  141         void            *newptr;
  142         size_t          newlen;
  143         size_t          newidx;
  144         int             (*newfunc)(struct sysctl_req *, void *, size_t);
  145         size_t          validlen;
  146         int             flags;
  147 };
  148 
  149 SLIST_HEAD(sysctl_oid_list, sysctl_oid);
  150 
  151 /*
  152  * This describes one "oid" in the MIB tree.  Potentially more nodes can
  153  * be hidden behind it, expanded by the handler.
  154  */
  155 struct sysctl_oid {
  156         struct sysctl_oid_list *oid_parent;
  157         SLIST_ENTRY(sysctl_oid) oid_link;
  158         int             oid_number;
  159         u_int           oid_kind;
  160         void            *oid_arg1;
  161         int             oid_arg2;
  162         const char      *oid_name;
  163         int             (*oid_handler)(SYSCTL_HANDLER_ARGS);
  164         const char      *oid_fmt;
  165         int             oid_refcnt;
  166         const char      *oid_descr;
  167 };
  168 
  169 #define SYSCTL_IN(r, p, l) (r->newfunc)(r, p, l)
  170 #define SYSCTL_OUT(r, p, l) (r->oldfunc)(r, p, l)
  171 
  172 int sysctl_handle_int(SYSCTL_HANDLER_ARGS);
  173 int sysctl_msec_to_ticks(SYSCTL_HANDLER_ARGS);
  174 int sysctl_handle_long(SYSCTL_HANDLER_ARGS);
  175 int sysctl_handle_quad(SYSCTL_HANDLER_ARGS);
  176 int sysctl_handle_intptr(SYSCTL_HANDLER_ARGS);
  177 int sysctl_handle_string(SYSCTL_HANDLER_ARGS);
  178 int sysctl_handle_opaque(SYSCTL_HANDLER_ARGS);
  179 
  180 int sysctl_dpcpu_int(SYSCTL_HANDLER_ARGS);
  181 int sysctl_dpcpu_long(SYSCTL_HANDLER_ARGS);
  182 int sysctl_dpcpu_quad(SYSCTL_HANDLER_ARGS);
  183 
  184 /*
  185  * These functions are used to add/remove an oid from the mib.
  186  */
  187 void sysctl_register_oid(struct sysctl_oid *oidp);
  188 void sysctl_unregister_oid(struct sysctl_oid *oidp);
  189 
  190 /* Declare a static oid to allow child oids to be added to it. */
  191 #define SYSCTL_DECL(name)                                       \
  192         extern struct sysctl_oid_list sysctl_##name##_children
  193 
  194 /* Hide these in macros */
  195 #define SYSCTL_CHILDREN(oid_ptr) (struct sysctl_oid_list *) \
  196         (oid_ptr)->oid_arg1
  197 #define SYSCTL_CHILDREN_SET(oid_ptr, val) \
  198         (oid_ptr)->oid_arg1 = (val);
  199 #define SYSCTL_STATIC_CHILDREN(oid_name) \
  200         (&sysctl_##oid_name##_children)
  201 
  202 /* === Structs and macros related to context handling === */
  203 
  204 /* All dynamically created sysctls can be tracked in a context list. */
  205 struct sysctl_ctx_entry {
  206         struct sysctl_oid *entry;
  207         TAILQ_ENTRY(sysctl_ctx_entry) link;
  208 };
  209 
  210 TAILQ_HEAD(sysctl_ctx_list, sysctl_ctx_entry);
  211 
  212 #define SYSCTL_NODE_CHILDREN(parent, name) \
  213         sysctl_##parent##_##name##_children
  214 
  215 #ifndef NO_SYSCTL_DESCR
  216 #define __DESCR(d) d
  217 #else
  218 #define __DESCR(d) ""
  219 #endif
  220 
  221 /* This constructs a "raw" MIB oid. */
  222 #define SYSCTL_OID(parent, nbr, name, kind, a1, a2, handler, fmt, descr) \
  223         static struct sysctl_oid sysctl__##parent##_##name = {           \
  224                 &sysctl_##parent##_children, { NULL }, nbr, kind,        \
  225                 a1, a2, #name, handler, fmt, 0, __DESCR(descr) };     \
  226         DATA_SET(sysctl_set, sysctl__##parent##_##name)
  227 
  228 #define SYSCTL_ADD_OID(ctx, parent, nbr, name, kind, a1, a2, handler, fmt, descr) \
  229         sysctl_add_oid(ctx, parent, nbr, name, kind, a1, a2, handler, fmt, __DESCR(descr))
  230 
  231 /* This constructs a node from which other oids can hang. */
  232 #define SYSCTL_NODE(parent, nbr, name, access, handler, descr)              \
  233         struct sysctl_oid_list SYSCTL_NODE_CHILDREN(parent, name);          \
  234         SYSCTL_OID(parent, nbr, name, CTLTYPE_NODE|(access),                \
  235             (void*)&SYSCTL_NODE_CHILDREN(parent, name), 0, handler, "N", descr)
  236 
  237 #define SYSCTL_ADD_NODE(ctx, parent, nbr, name, access, handler, descr)     \
  238         sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_NODE|(access),       \
  239         NULL, 0, handler, "N", __DESCR(descr))
  240 
  241 /* Oid for a string.  len can be 0 to indicate '\0' termination. */
  242 #define SYSCTL_STRING(parent, nbr, name, access, arg, len, descr) \
  243         SYSCTL_OID(parent, nbr, name, CTLTYPE_STRING|(access), \
  244                 arg, len, sysctl_handle_string, "A", descr)
  245 
  246 #define SYSCTL_ADD_STRING(ctx, parent, nbr, name, access, arg, len, descr)  \
  247         sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_STRING|(access),     \
  248         arg, len, sysctl_handle_string, "A", __DESCR(descr))
  249 
  250 /* Oid for an int.  If ptr is NULL, val is returned. */
  251 #define SYSCTL_INT(parent, nbr, name, access, ptr, val, descr) \
  252         SYSCTL_OID(parent, nbr, name, CTLTYPE_INT|CTLFLAG_MPSAFE|(access), \
  253                 ptr, val, sysctl_handle_int, "I", descr)
  254 
  255 #define SYSCTL_ADD_INT(ctx, parent, nbr, name, access, ptr, val, descr)     \
  256         sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_INT|CTLFLAG_MPSAFE|(access),         \
  257         ptr, val, sysctl_handle_int, "I", __DESCR(descr))
  258 
  259 /* Oid for an unsigned int.  If ptr is NULL, val is returned. */
  260 #define SYSCTL_UINT(parent, nbr, name, access, ptr, val, descr) \
  261         SYSCTL_OID(parent, nbr, name, CTLTYPE_UINT|CTLFLAG_MPSAFE|(access), \
  262                 ptr, val, sysctl_handle_int, "IU", descr)
  263 
  264 #define SYSCTL_ADD_UINT(ctx, parent, nbr, name, access, ptr, val, descr)    \
  265         sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_UINT|CTLFLAG_MPSAFE|(access),        \
  266         ptr, val, sysctl_handle_int, "IU", __DESCR(descr))
  267 
  268 #define SYSCTL_XINT(parent, nbr, name, access, ptr, val, descr) \
  269         SYSCTL_OID(parent, nbr, name, CTLTYPE_UINT|CTLFLAG_MPSAFE|(access), \
  270                 ptr, val, sysctl_handle_int, "IX", descr)
  271 
  272 #define SYSCTL_ADD_XINT(ctx, parent, nbr, name, access, ptr, val, descr)    \
  273         sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_UINT|CTLFLAG_MPSAFE|(access),        \
  274         ptr, val, sysctl_handle_int, "IX", __DESCR(descr))
  275 
  276 /* Oid for a long.  The pointer must be non NULL. */
  277 #define SYSCTL_LONG(parent, nbr, name, access, ptr, val, descr) \
  278         SYSCTL_OID(parent, nbr, name, CTLTYPE_LONG|CTLFLAG_MPSAFE|(access), \
  279                 ptr, val, sysctl_handle_long, "L", descr)
  280 
  281 #define SYSCTL_ADD_LONG(ctx, parent, nbr, name, access, ptr, descr)         \
  282         sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_LONG|CTLFLAG_MPSAFE|(access),        \
  283         ptr, 0, sysctl_handle_long, "L", __DESCR(descr))
  284 
  285 /* Oid for an unsigned long.  The pointer must be non NULL. */
  286 #define SYSCTL_ULONG(parent, nbr, name, access, ptr, val, descr) \
  287         SYSCTL_OID(parent, nbr, name, CTLTYPE_ULONG|CTLFLAG_MPSAFE|(access), \
  288                 ptr, val, sysctl_handle_long, "LU", __DESCR(descr))
  289 
  290 #define SYSCTL_ADD_ULONG(ctx, parent, nbr, name, access, ptr, descr)        \
  291         sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_ULONG|CTLFLAG_MPSAFE|(access),       \
  292         ptr, 0, sysctl_handle_long, "LU", __DESCR(descr))
  293 
  294 #define SYSCTL_XLONG(parent, nbr, name, access, ptr, val, descr) \
  295         SYSCTL_OID(parent, nbr, name, CTLTYPE_ULONG|CTLFLAG_MPSAFE|(access), \
  296                 ptr, val, sysctl_handle_long, "LX", __DESCR(descr))
  297 
  298 #define SYSCTL_ADD_XLONG(ctx, parent, nbr, name, access, ptr, descr)        \
  299         sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_ULONG|CTLFLAG_MPSAFE|(access),       \
  300         ptr, 0, sysctl_handle_long, "LX", __DESCR(descr))
  301 
  302 /* Oid for a quad.  The pointer must be non NULL. */
  303 #define SYSCTL_QUAD(parent, nbr, name, access, ptr, val, descr) \
  304         SYSCTL_OID(parent, nbr, name, CTLTYPE_QUAD|CTLFLAG_MPSAFE|(access), \
  305                 ptr, val, sysctl_handle_quad, "Q", __DESCR(descr))
  306 
  307 #define SYSCTL_ADD_QUAD(ctx, parent, nbr, name, access, ptr, descr)         \
  308         sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_QUAD|CTLFLAG_MPSAFE|(access),        \
  309         ptr, 0, sysctl_handle_quad, "Q", __DESCR(descr))
  310 
  311 /* Oid for an opaque object.  Specified by a pointer and a length. */
  312 #define SYSCTL_OPAQUE(parent, nbr, name, access, ptr, len, fmt, descr) \
  313         SYSCTL_OID(parent, nbr, name, CTLTYPE_OPAQUE|(access), \
  314                 ptr, len, sysctl_handle_opaque, fmt, descr)
  315 
  316 #define SYSCTL_ADD_OPAQUE(ctx, parent, nbr, name, access, ptr, len, fmt, descr)\
  317         sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_OPAQUE|(access),     \
  318         ptr, len, sysctl_handle_opaque, fmt, __DESCR(descr))
  319 
  320 /* Oid for a struct.  Specified by a pointer and a type. */
  321 #define SYSCTL_STRUCT(parent, nbr, name, access, ptr, type, descr) \
  322         SYSCTL_OID(parent, nbr, name, CTLTYPE_OPAQUE|(access), \
  323                 ptr, sizeof(struct type), sysctl_handle_opaque, \
  324                 "S," #type, descr)
  325 
  326 #define SYSCTL_ADD_STRUCT(ctx, parent, nbr, name, access, ptr, type, descr) \
  327         sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_OPAQUE|(access),     \
  328         ptr, sizeof(struct type), sysctl_handle_opaque, "S," #type, __DESCR(descr))
  329 
  330 /* Oid for a procedure.  Specified by a pointer and an arg. */
  331 #define SYSCTL_PROC(parent, nbr, name, access, ptr, arg, handler, fmt, descr) \
  332         SYSCTL_OID(parent, nbr, name, (access), \
  333                 ptr, arg, handler, fmt, descr)
  334 
  335 #define SYSCTL_ADD_PROC(ctx, parent, nbr, name, access, ptr, arg, handler, fmt, descr) \
  336         sysctl_add_oid(ctx, parent, nbr, name, (access),                            \
  337         ptr, arg, handler, fmt, __DESCR(descr))
  338 
  339 /*
  340  * A macro to generate a read-only sysctl to indicate the presense of optional
  341  * kernel features.
  342  */
  343 #define FEATURE(name, desc)                                             \
  344         SYSCTL_INT(_kern_features, OID_AUTO, name, CTLFLAG_RD, 0, 1, desc)
  345 
  346 #endif /* _KERNEL */
  347 
  348 /*
  349  * Top-level identifiers
  350  */
  351 #define CTL_UNSPEC      0               /* unused */
  352 #define CTL_KERN        1               /* "high kernel": proc, limits */
  353 #define CTL_VM          2               /* virtual memory */
  354 #define CTL_VFS         3               /* filesystem, mount type is next */
  355 #define CTL_NET         4               /* network, see socket.h */
  356 #define CTL_DEBUG       5               /* debugging parameters */
  357 #define CTL_HW          6               /* generic cpu/io */
  358 #define CTL_MACHDEP     7               /* machine dependent */
  359 #define CTL_USER        8               /* user-level */
  360 #define CTL_P1003_1B    9               /* POSIX 1003.1B */
  361 #define CTL_MAXID       10              /* number of valid top-level ids */
  362 
  363 #define CTL_NAMES { \
  364         { 0, 0 }, \
  365         { "kern", CTLTYPE_NODE }, \
  366         { "vm", CTLTYPE_NODE }, \
  367         { "vfs", CTLTYPE_NODE }, \
  368         { "net", CTLTYPE_NODE }, \
  369         { "debug", CTLTYPE_NODE }, \
  370         { "hw", CTLTYPE_NODE }, \
  371         { "machdep", CTLTYPE_NODE }, \
  372         { "user", CTLTYPE_NODE }, \
  373         { "p1003_1b", CTLTYPE_NODE }, \
  374 }
  375 
  376 /*
  377  * CTL_KERN identifiers
  378  */
  379 #define KERN_OSTYPE              1      /* string: system version */
  380 #define KERN_OSRELEASE           2      /* string: system release */
  381 #define KERN_OSREV               3      /* int: system revision */
  382 #define KERN_VERSION             4      /* string: compile time info */
  383 #define KERN_MAXVNODES           5      /* int: max vnodes */
  384 #define KERN_MAXPROC             6      /* int: max processes */
  385 #define KERN_MAXFILES            7      /* int: max open files */
  386 #define KERN_ARGMAX              8      /* int: max arguments to exec */
  387 #define KERN_SECURELVL           9      /* int: system security level */
  388 #define KERN_HOSTNAME           10      /* string: hostname */
  389 #define KERN_HOSTID             11      /* int: host identifier */
  390 #define KERN_CLOCKRATE          12      /* struct: struct clockrate */
  391 #define KERN_VNODE              13      /* struct: vnode structures */
  392 #define KERN_PROC               14      /* struct: process entries */
  393 #define KERN_FILE               15      /* struct: file entries */
  394 #define KERN_PROF               16      /* node: kernel profiling info */
  395 #define KERN_POSIX1             17      /* int: POSIX.1 version */
  396 #define KERN_NGROUPS            18      /* int: # of supplemental group ids */
  397 #define KERN_JOB_CONTROL        19      /* int: is job control available */
  398 #define KERN_SAVED_IDS          20      /* int: saved set-user/group-ID */
  399 #define KERN_BOOTTIME           21      /* struct: time kernel was booted */
  400 #define KERN_NISDOMAINNAME      22      /* string: YP domain name */
  401 #define KERN_UPDATEINTERVAL     23      /* int: update process sleep time */
  402 #define KERN_OSRELDATE          24      /* int: kernel release date */
  403 #define KERN_NTP_PLL            25      /* node: NTP PLL control */
  404 #define KERN_BOOTFILE           26      /* string: name of booted kernel */
  405 #define KERN_MAXFILESPERPROC    27      /* int: max open files per proc */
  406 #define KERN_MAXPROCPERUID      28      /* int: max processes per uid */
  407 #define KERN_DUMPDEV            29      /* struct cdev *: device to dump on */
  408 #define KERN_IPC                30      /* node: anything related to IPC */
  409 #define KERN_DUMMY              31      /* unused */
  410 #define KERN_PS_STRINGS         32      /* int: address of PS_STRINGS */
  411 #define KERN_USRSTACK           33      /* int: address of USRSTACK */
  412 #define KERN_LOGSIGEXIT         34      /* int: do we log sigexit procs? */
  413 #define KERN_IOV_MAX            35      /* int: value of UIO_MAXIOV */
  414 #define KERN_HOSTUUID           36      /* string: host UUID identifier */
  415 #define KERN_ARND               37      /* int: from arc4rand() */
  416 #define KERN_MAXID              38      /* number of valid kern ids */
  417 
  418 #define CTL_KERN_NAMES { \
  419         { 0, 0 }, \
  420         { "ostype", CTLTYPE_STRING }, \
  421         { "osrelease", CTLTYPE_STRING }, \
  422         { "osrevision", CTLTYPE_INT }, \
  423         { "version", CTLTYPE_STRING }, \
  424         { "maxvnodes", CTLTYPE_INT }, \
  425         { "maxproc", CTLTYPE_INT }, \
  426         { "maxfiles", CTLTYPE_INT }, \
  427         { "argmax", CTLTYPE_INT }, \
  428         { "securelevel", CTLTYPE_INT }, \
  429         { "hostname", CTLTYPE_STRING }, \
  430         { "hostid", CTLTYPE_UINT }, \
  431         { "clockrate", CTLTYPE_STRUCT }, \
  432         { "vnode", CTLTYPE_STRUCT }, \
  433         { "proc", CTLTYPE_STRUCT }, \
  434         { "file", CTLTYPE_STRUCT }, \
  435         { "profiling", CTLTYPE_NODE }, \
  436         { "posix1version", CTLTYPE_INT }, \
  437         { "ngroups", CTLTYPE_INT }, \
  438         { "job_control", CTLTYPE_INT }, \
  439         { "saved_ids", CTLTYPE_INT }, \
  440         { "boottime", CTLTYPE_STRUCT }, \
  441         { "nisdomainname", CTLTYPE_STRING }, \
  442         { "update", CTLTYPE_INT }, \
  443         { "osreldate", CTLTYPE_INT }, \
  444         { "ntp_pll", CTLTYPE_NODE }, \
  445         { "bootfile", CTLTYPE_STRING }, \
  446         { "maxfilesperproc", CTLTYPE_INT }, \
  447         { "maxprocperuid", CTLTYPE_INT }, \
  448         { "ipc", CTLTYPE_NODE }, \
  449         { "dummy", CTLTYPE_INT }, \
  450         { "ps_strings", CTLTYPE_INT }, \
  451         { "usrstack", CTLTYPE_INT }, \
  452         { "logsigexit", CTLTYPE_INT }, \
  453         { "iov_max", CTLTYPE_INT }, \
  454         { "hostuuid", CTLTYPE_STRING }, \
  455 }
  456 
  457 /*
  458  * CTL_VFS identifiers
  459  */
  460 #define CTL_VFS_NAMES { \
  461         { "vfsconf", CTLTYPE_STRUCT }, \
  462 }
  463 
  464 /*
  465  * KERN_PROC subtypes
  466  */
  467 #define KERN_PROC_ALL           0       /* everything */
  468 #define KERN_PROC_PID           1       /* by process id */
  469 #define KERN_PROC_PGRP          2       /* by process group id */
  470 #define KERN_PROC_SESSION       3       /* by session of pid */
  471 #define KERN_PROC_TTY           4       /* by controlling tty */
  472 #define KERN_PROC_UID           5       /* by effective uid */
  473 #define KERN_PROC_RUID          6       /* by real uid */
  474 #define KERN_PROC_ARGS          7       /* get/set arguments/proctitle */
  475 #define KERN_PROC_PROC          8       /* only return procs */
  476 #define KERN_PROC_SV_NAME       9       /* get syscall vector name */
  477 #define KERN_PROC_RGID          10      /* by real group id */
  478 #define KERN_PROC_GID           11      /* by effective group id */
  479 #define KERN_PROC_PATHNAME      12      /* path to executable */
  480 #define KERN_PROC_OVMMAP        13      /* Old VM map entries for process */
  481 #define KERN_PROC_OFILEDESC     14      /* Old file descriptors for process */
  482 #define KERN_PROC_KSTACK        15      /* Kernel stacks for process */
  483 #define KERN_PROC_INC_THREAD    0x10    /*
  484                                          * modifier for pid, pgrp, tty,
  485                                          * uid, ruid, gid, rgid and proc
  486                                          * This effectively uses 16-31
  487                                          */
  488 #define KERN_PROC_VMMAP         32      /* VM map entries for process */
  489 #define KERN_PROC_FILEDESC      33      /* File descriptors for process */
  490 #define KERN_PROC_GROUPS        34      /* process groups */
  491 
  492 /*
  493  * KERN_IPC identifiers
  494  */
  495 #define KIPC_MAXSOCKBUF         1       /* int: max size of a socket buffer */
  496 #define KIPC_SOCKBUF_WASTE      2       /* int: wastage factor in sockbuf */
  497 #define KIPC_SOMAXCONN          3       /* int: max length of connection q */
  498 #define KIPC_MAX_LINKHDR        4       /* int: max length of link header */
  499 #define KIPC_MAX_PROTOHDR       5       /* int: max length of network header */
  500 #define KIPC_MAX_HDR            6       /* int: max total length of headers */
  501 #define KIPC_MAX_DATALEN        7       /* int: max length of data? */
  502 
  503 /*
  504  * CTL_HW identifiers
  505  */
  506 #define HW_MACHINE       1              /* string: machine class */
  507 #define HW_MODEL         2              /* string: specific machine model */
  508 #define HW_NCPU          3              /* int: number of cpus */
  509 #define HW_BYTEORDER     4              /* int: machine byte order */
  510 #define HW_PHYSMEM       5              /* int: total memory */
  511 #define HW_USERMEM       6              /* int: non-kernel memory */
  512 #define HW_PAGESIZE      7              /* int: software page size */
  513 #define HW_DISKNAMES     8              /* strings: disk drive names */
  514 #define HW_DISKSTATS     9              /* struct: diskstats[] */
  515 #define HW_FLOATINGPT   10              /* int: has HW floating point? */
  516 #define HW_MACHINE_ARCH 11              /* string: machine architecture */
  517 #define HW_REALMEM      12              /* int: 'real' memory */
  518 #define HW_MAXID        13              /* number of valid hw ids */
  519 
  520 #define CTL_HW_NAMES { \
  521         { 0, 0 }, \
  522         { "machine", CTLTYPE_STRING }, \
  523         { "model", CTLTYPE_STRING }, \
  524         { "ncpu", CTLTYPE_INT }, \
  525         { "byteorder", CTLTYPE_INT }, \
  526         { "physmem", CTLTYPE_ULONG }, \
  527         { "usermem", CTLTYPE_ULONG }, \
  528         { "pagesize", CTLTYPE_INT }, \
  529         { "disknames", CTLTYPE_STRUCT }, \
  530         { "diskstats", CTLTYPE_STRUCT }, \
  531         { "floatingpoint", CTLTYPE_INT }, \
  532         { "machine_arch", CTLTYPE_STRING }, \
  533         { "realmem", CTLTYPE_ULONG }, \
  534 }
  535 
  536 /*
  537  * CTL_USER definitions
  538  */
  539 #define USER_CS_PATH             1      /* string: _CS_PATH */
  540 #define USER_BC_BASE_MAX         2      /* int: BC_BASE_MAX */
  541 #define USER_BC_DIM_MAX          3      /* int: BC_DIM_MAX */
  542 #define USER_BC_SCALE_MAX        4      /* int: BC_SCALE_MAX */
  543 #define USER_BC_STRING_MAX       5      /* int: BC_STRING_MAX */
  544 #define USER_COLL_WEIGHTS_MAX    6      /* int: COLL_WEIGHTS_MAX */
  545 #define USER_EXPR_NEST_MAX       7      /* int: EXPR_NEST_MAX */
  546 #define USER_LINE_MAX            8      /* int: LINE_MAX */
  547 #define USER_RE_DUP_MAX          9      /* int: RE_DUP_MAX */
  548 #define USER_POSIX2_VERSION     10      /* int: POSIX2_VERSION */
  549 #define USER_POSIX2_C_BIND      11      /* int: POSIX2_C_BIND */
  550 #define USER_POSIX2_C_DEV       12      /* int: POSIX2_C_DEV */
  551 #define USER_POSIX2_CHAR_TERM   13      /* int: POSIX2_CHAR_TERM */
  552 #define USER_POSIX2_FORT_DEV    14      /* int: POSIX2_FORT_DEV */
  553 #define USER_POSIX2_FORT_RUN    15      /* int: POSIX2_FORT_RUN */
  554 #define USER_POSIX2_LOCALEDEF   16      /* int: POSIX2_LOCALEDEF */
  555 #define USER_POSIX2_SW_DEV      17      /* int: POSIX2_SW_DEV */
  556 #define USER_POSIX2_UPE         18      /* int: POSIX2_UPE */
  557 #define USER_STREAM_MAX         19      /* int: POSIX2_STREAM_MAX */
  558 #define USER_TZNAME_MAX         20      /* int: POSIX2_TZNAME_MAX */
  559 #define USER_MAXID              21      /* number of valid user ids */
  560 
  561 #define CTL_USER_NAMES { \
  562         { 0, 0 }, \
  563         { "cs_path", CTLTYPE_STRING }, \
  564         { "bc_base_max", CTLTYPE_INT }, \
  565         { "bc_dim_max", CTLTYPE_INT }, \
  566         { "bc_scale_max", CTLTYPE_INT }, \
  567         { "bc_string_max", CTLTYPE_INT }, \
  568         { "coll_weights_max", CTLTYPE_INT }, \
  569         { "expr_nest_max", CTLTYPE_INT }, \
  570         { "line_max", CTLTYPE_INT }, \
  571         { "re_dup_max", CTLTYPE_INT }, \
  572         { "posix2_version", CTLTYPE_INT }, \
  573         { "posix2_c_bind", CTLTYPE_INT }, \
  574         { "posix2_c_dev", CTLTYPE_INT }, \
  575         { "posix2_char_term", CTLTYPE_INT }, \
  576         { "posix2_fort_dev", CTLTYPE_INT }, \
  577         { "posix2_fort_run", CTLTYPE_INT }, \
  578         { "posix2_localedef", CTLTYPE_INT }, \
  579         { "posix2_sw_dev", CTLTYPE_INT }, \
  580         { "posix2_upe", CTLTYPE_INT }, \
  581         { "stream_max", CTLTYPE_INT }, \
  582         { "tzname_max", CTLTYPE_INT }, \
  583 }
  584 
  585 #define CTL_P1003_1B_ASYNCHRONOUS_IO            1       /* boolean */
  586 #define CTL_P1003_1B_MAPPED_FILES               2       /* boolean */
  587 #define CTL_P1003_1B_MEMLOCK                    3       /* boolean */
  588 #define CTL_P1003_1B_MEMLOCK_RANGE              4       /* boolean */
  589 #define CTL_P1003_1B_MEMORY_PROTECTION          5       /* boolean */
  590 #define CTL_P1003_1B_MESSAGE_PASSING            6       /* boolean */
  591 #define CTL_P1003_1B_PRIORITIZED_IO             7       /* boolean */
  592 #define CTL_P1003_1B_PRIORITY_SCHEDULING        8       /* boolean */
  593 #define CTL_P1003_1B_REALTIME_SIGNALS           9       /* boolean */
  594 #define CTL_P1003_1B_SEMAPHORES                 10      /* boolean */
  595 #define CTL_P1003_1B_FSYNC                      11      /* boolean */
  596 #define CTL_P1003_1B_SHARED_MEMORY_OBJECTS      12      /* boolean */
  597 #define CTL_P1003_1B_SYNCHRONIZED_IO            13      /* boolean */
  598 #define CTL_P1003_1B_TIMERS                     14      /* boolean */
  599 #define CTL_P1003_1B_AIO_LISTIO_MAX             15      /* int */
  600 #define CTL_P1003_1B_AIO_MAX                    16      /* int */
  601 #define CTL_P1003_1B_AIO_PRIO_DELTA_MAX         17      /* int */
  602 #define CTL_P1003_1B_DELAYTIMER_MAX             18      /* int */
  603 #define CTL_P1003_1B_MQ_OPEN_MAX                19      /* int */
  604 #define CTL_P1003_1B_PAGESIZE                   20      /* int */
  605 #define CTL_P1003_1B_RTSIG_MAX                  21      /* int */
  606 #define CTL_P1003_1B_SEM_NSEMS_MAX              22      /* int */
  607 #define CTL_P1003_1B_SEM_VALUE_MAX              23      /* int */
  608 #define CTL_P1003_1B_SIGQUEUE_MAX               24      /* int */
  609 #define CTL_P1003_1B_TIMER_MAX                  25      /* int */
  610 
  611 #define CTL_P1003_1B_MAXID              26
  612 
  613 #define CTL_P1003_1B_NAMES { \
  614         { 0, 0 }, \
  615         { "asynchronous_io", CTLTYPE_INT }, \
  616         { "mapped_files", CTLTYPE_INT }, \
  617         { "memlock", CTLTYPE_INT }, \
  618         { "memlock_range", CTLTYPE_INT }, \
  619         { "memory_protection", CTLTYPE_INT }, \
  620         { "message_passing", CTLTYPE_INT }, \
  621         { "prioritized_io", CTLTYPE_INT }, \
  622         { "priority_scheduling", CTLTYPE_INT }, \
  623         { "realtime_signals", CTLTYPE_INT }, \
  624         { "semaphores", CTLTYPE_INT }, \
  625         { "fsync", CTLTYPE_INT }, \
  626         { "shared_memory_objects", CTLTYPE_INT }, \
  627         { "synchronized_io", CTLTYPE_INT }, \
  628         { "timers", CTLTYPE_INT }, \
  629         { "aio_listio_max", CTLTYPE_INT }, \
  630         { "aio_max", CTLTYPE_INT }, \
  631         { "aio_prio_delta_max", CTLTYPE_INT }, \
  632         { "delaytimer_max", CTLTYPE_INT }, \
  633         { "mq_open_max", CTLTYPE_INT }, \
  634         { "pagesize", CTLTYPE_INT }, \
  635         { "rtsig_max", CTLTYPE_INT }, \
  636         { "nsems_max", CTLTYPE_INT }, \
  637         { "sem_value_max", CTLTYPE_INT }, \
  638         { "sigqueue_max", CTLTYPE_INT }, \
  639         { "timer_max", CTLTYPE_INT }, \
  640 }
  641 
  642 #ifdef _KERNEL
  643 
  644 /*
  645  * Declare some common oids.
  646  */
  647 extern struct sysctl_oid_list sysctl__children;
  648 SYSCTL_DECL(_kern);
  649 SYSCTL_DECL(_kern_features);
  650 SYSCTL_DECL(_kern_ipc);
  651 SYSCTL_DECL(_kern_proc);
  652 SYSCTL_DECL(_kern_sched);
  653 SYSCTL_DECL(_kern_sched_stats);
  654 SYSCTL_DECL(_sysctl);
  655 SYSCTL_DECL(_vm);
  656 SYSCTL_DECL(_vm_stats);
  657 SYSCTL_DECL(_vm_stats_misc);
  658 SYSCTL_DECL(_vfs);
  659 SYSCTL_DECL(_net);
  660 SYSCTL_DECL(_debug);
  661 SYSCTL_DECL(_debug_sizeof);
  662 SYSCTL_DECL(_dev);
  663 SYSCTL_DECL(_hw);
  664 SYSCTL_DECL(_hw_bus);
  665 SYSCTL_DECL(_hw_bus_devices);
  666 SYSCTL_DECL(_hw_bus_info);
  667 SYSCTL_DECL(_machdep);
  668 SYSCTL_DECL(_user);
  669 SYSCTL_DECL(_compat);
  670 SYSCTL_DECL(_regression);
  671 SYSCTL_DECL(_security);
  672 SYSCTL_DECL(_security_bsd);
  673 
  674 extern char     machine[];
  675 extern char     osrelease[];
  676 extern char     ostype[];
  677 extern char     kern_ident[];
  678 
  679 /* Dynamic oid handling */
  680 struct sysctl_oid *sysctl_add_oid(struct sysctl_ctx_list *clist,
  681                 struct sysctl_oid_list *parent, int nbr, const char *name,
  682                 int kind, void *arg1, int arg2,
  683                 int (*handler) (SYSCTL_HANDLER_ARGS),
  684                 const char *fmt, const char *descr);
  685 void    sysctl_rename_oid(struct sysctl_oid *oidp, const char *name);
  686 int     sysctl_move_oid(struct sysctl_oid *oidp,
  687                 struct sysctl_oid_list *parent);
  688 int     sysctl_remove_oid(struct sysctl_oid *oidp, int del, int recurse);
  689 int     sysctl_ctx_init(struct sysctl_ctx_list *clist);
  690 int     sysctl_ctx_free(struct sysctl_ctx_list *clist);
  691 struct  sysctl_ctx_entry *sysctl_ctx_entry_add(struct sysctl_ctx_list *clist,
  692                 struct sysctl_oid *oidp);
  693 struct  sysctl_ctx_entry *sysctl_ctx_entry_find(struct sysctl_ctx_list *clist,
  694                 struct sysctl_oid *oidp);
  695 int     sysctl_ctx_entry_del(struct sysctl_ctx_list *clist,
  696                 struct sysctl_oid *oidp);
  697 
  698 int     kernel_sysctl(struct thread *td, int *name, u_int namelen, void *old,
  699                       size_t *oldlenp, void *new, size_t newlen,
  700                       size_t *retval, int flags);
  701 int     kernel_sysctlbyname(struct thread *td, char *name,
  702                 void *old, size_t *oldlenp, void *new, size_t newlen,
  703                 size_t *retval, int flags);
  704 int     userland_sysctl(struct thread *td, int *name, u_int namelen, void *old,
  705                         size_t *oldlenp, int inkernel, void *new, size_t newlen,
  706                         size_t *retval, int flags);
  707 int     sysctl_find_oid(int *name, u_int namelen, struct sysctl_oid **noid,
  708                         int *nindx, struct sysctl_req *req);
  709 void    sysctl_lock(void);
  710 void    sysctl_unlock(void);
  711 int     sysctl_wire_old_buffer(struct sysctl_req *req, size_t len);
  712 
  713 #else   /* !_KERNEL */
  714 #include <sys/cdefs.h>
  715 
  716 __BEGIN_DECLS
  717 int     sysctl(int *, u_int, void *, size_t *, void *, size_t);
  718 int     sysctlbyname(const char *, void *, size_t *, void *, size_t);
  719 int     sysctlnametomib(const char *, int *, size_t *);
  720 __END_DECLS
  721 #endif  /* _KERNEL */
  722 
  723 #endif  /* !_SYS_SYSCTL_H_ */

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