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_S64     4       /* name describes a signed 64-bit number */
   70 #define CTLTYPE_OPAQUE  5       /* name describes a structure */
   71 #define CTLTYPE_STRUCT  CTLTYPE_OPAQUE  /* name describes a structure */
   72 #define CTLTYPE_UINT    6       /* name describes an unsigned integer */
   73 #define CTLTYPE_LONG    7       /* name describes a long */
   74 #define CTLTYPE_ULONG   8       /* name describes an unsigned long */
   75 #define CTLTYPE_U64     9       /* name describes an unsigned 64-bit number */
   76 #define CTLTYPE_U8      0xa     /* name describes an unsigned 8-bit number */
   77 #define CTLTYPE_U16     0xb     /* name describes an unsigned 16-bit number */
   78 #define CTLTYPE_S8      0xc     /* name describes a signed 8-bit number */
   79 #define CTLTYPE_S16     0xd     /* name describes a signed 16-bit number */
   80 #define CTLTYPE_S32     0xe     /* name describes a signed 32-bit number */
   81 #define CTLTYPE_U32     0xf     /* name describes an unsigned 32-bit number */
   82 
   83 #define CTLFLAG_RD      0x80000000      /* Allow reads of variable */
   84 #define CTLFLAG_WR      0x40000000      /* Allow writes to the variable */
   85 #define CTLFLAG_RW      (CTLFLAG_RD|CTLFLAG_WR)
   86 #define CTLFLAG_DORMANT 0x20000000      /* This sysctl is not active yet */
   87 #define CTLFLAG_ANYBODY 0x10000000      /* All users can set this var */
   88 #define CTLFLAG_SECURE  0x08000000      /* Permit set only if securelevel<=0 */
   89 #define CTLFLAG_PRISON  0x04000000      /* Prisoned roots can fiddle */
   90 #define CTLFLAG_DYN     0x02000000      /* Dynamic oid - can be freed */
   91 #define CTLFLAG_SKIP    0x01000000      /* Skip this sysctl when listing */
   92 #define CTLMASK_SECURE  0x00F00000      /* Secure level */
   93 #define CTLFLAG_TUN     0x00080000      /* Default value is loaded from getenv() */
   94 #define CTLFLAG_RDTUN   (CTLFLAG_RD|CTLFLAG_TUN)
   95 #define CTLFLAG_RWTUN   (CTLFLAG_RW|CTLFLAG_TUN)
   96 #define CTLFLAG_MPSAFE  0x00040000      /* Handler is MP safe */
   97 #define CTLFLAG_VNET    0x00020000      /* Prisons with vnet can fiddle */
   98 #define CTLFLAG_DYING   0x00010000      /* Oid is being removed */
   99 #define CTLFLAG_CAPRD   0x00008000      /* Can be read in capability mode */
  100 #define CTLFLAG_CAPWR   0x00004000      /* Can be written in capability mode */
  101 #define CTLFLAG_STATS   0x00002000      /* Statistics, not a tuneable */
  102 #define CTLFLAG_NOFETCH 0x00001000      /* Don't fetch tunable from getenv() */
  103 #define CTLFLAG_CAPRW   (CTLFLAG_CAPRD|CTLFLAG_CAPWR)
  104 
  105 /*
  106  * Secure level.   Note that CTLFLAG_SECURE == CTLFLAG_SECURE1.
  107  *
  108  * Secure when the securelevel is raised to at least N.
  109  */
  110 #define CTLSHIFT_SECURE 20
  111 #define CTLFLAG_SECURE1 (CTLFLAG_SECURE | (0 << CTLSHIFT_SECURE))
  112 #define CTLFLAG_SECURE2 (CTLFLAG_SECURE | (1 << CTLSHIFT_SECURE))
  113 #define CTLFLAG_SECURE3 (CTLFLAG_SECURE | (2 << CTLSHIFT_SECURE))
  114 
  115 /*
  116  * USE THIS instead of a hardwired number from the categories below
  117  * to get dynamically assigned sysctl entries using the linker-set
  118  * technology. This is the way nearly all new sysctl variables should
  119  * be implemented.
  120  * e.g. SYSCTL_INT(_parent, OID_AUTO, name, CTLFLAG_RW, &variable, 0, "");
  121  */
  122 #define OID_AUTO        (-1)
  123 
  124 /*
  125  * The starting number for dynamically-assigned entries.  WARNING!
  126  * ALL static sysctl entries should have numbers LESS than this!
  127  */
  128 #define CTL_AUTO_START  0x100
  129 
  130 #ifdef _KERNEL
  131 #include <sys/linker_set.h>
  132 
  133 #ifdef KLD_MODULE
  134 /* XXX allow overspecification of type in external kernel modules */
  135 #define SYSCTL_CT_ASSERT_MASK CTLTYPE
  136 #else
  137 #define SYSCTL_CT_ASSERT_MASK 0
  138 #endif
  139 
  140 #define SYSCTL_HANDLER_ARGS struct sysctl_oid *oidp, void *arg1,        \
  141         intmax_t arg2, struct sysctl_req *req
  142 
  143 /* definitions for sysctl_req 'lock' member */
  144 #define REQ_UNWIRED     1
  145 #define REQ_WIRED       2
  146 
  147 /* definitions for sysctl_req 'flags' member */
  148 #if defined(__amd64__) || defined(__powerpc64__) ||\
  149     (defined(__mips__) && defined(__mips_n64))
  150 #define SCTL_MASK32     1       /* 32 bit emulation */
  151 #endif
  152 
  153 /*
  154  * This describes the access space for a sysctl request.  This is needed
  155  * so that we can use the interface from the kernel or from user-space.
  156  */
  157 struct sysctl_req {
  158         struct thread   *td;            /* used for access checking */
  159         int              lock;          /* wiring state */
  160         void            *oldptr;
  161         size_t           oldlen;
  162         size_t           oldidx;
  163         int             (*oldfunc)(struct sysctl_req *, const void *, size_t);
  164         void            *newptr;
  165         size_t           newlen;
  166         size_t           newidx;
  167         int             (*newfunc)(struct sysctl_req *, void *, size_t);
  168         size_t           validlen;
  169         int              flags;
  170 };
  171 
  172 SLIST_HEAD(sysctl_oid_list, sysctl_oid);
  173 
  174 /*
  175  * This describes one "oid" in the MIB tree.  Potentially more nodes can
  176  * be hidden behind it, expanded by the handler.
  177  */
  178 struct sysctl_oid {
  179         struct sysctl_oid_list oid_children;
  180         struct sysctl_oid_list *oid_parent;
  181         SLIST_ENTRY(sysctl_oid) oid_link;
  182         int              oid_number;
  183         u_int            oid_kind;
  184         void            *oid_arg1;
  185         intmax_t         oid_arg2;
  186         const char      *oid_name;
  187         int             (*oid_handler)(SYSCTL_HANDLER_ARGS);
  188         const char      *oid_fmt;
  189         int              oid_refcnt;
  190         u_int            oid_running;
  191         const char      *oid_descr;
  192 };
  193 
  194 #define SYSCTL_IN(r, p, l)      (r->newfunc)(r, p, l)
  195 #define SYSCTL_OUT(r, p, l)     (r->oldfunc)(r, p, l)
  196 #define SYSCTL_OUT_STR(r, p)    (r->oldfunc)(r, p, strlen(p) + 1)
  197 
  198 int sysctl_handle_bool(SYSCTL_HANDLER_ARGS);
  199 int sysctl_handle_8(SYSCTL_HANDLER_ARGS);
  200 int sysctl_handle_16(SYSCTL_HANDLER_ARGS);
  201 int sysctl_handle_32(SYSCTL_HANDLER_ARGS);
  202 int sysctl_handle_64(SYSCTL_HANDLER_ARGS);
  203 int sysctl_handle_int(SYSCTL_HANDLER_ARGS);
  204 int sysctl_msec_to_ticks(SYSCTL_HANDLER_ARGS);
  205 int sysctl_handle_long(SYSCTL_HANDLER_ARGS);
  206 int sysctl_handle_string(SYSCTL_HANDLER_ARGS);
  207 int sysctl_handle_opaque(SYSCTL_HANDLER_ARGS);
  208 int sysctl_handle_counter_u64(SYSCTL_HANDLER_ARGS);
  209 int sysctl_handle_counter_u64_array(SYSCTL_HANDLER_ARGS);
  210 
  211 int sysctl_handle_uma_zone_max(SYSCTL_HANDLER_ARGS);
  212 int sysctl_handle_uma_zone_cur(SYSCTL_HANDLER_ARGS);
  213 
  214 int sysctl_sec_to_timeval(SYSCTL_HANDLER_ARGS);
  215 
  216 int sysctl_dpcpu_int(SYSCTL_HANDLER_ARGS);
  217 int sysctl_dpcpu_long(SYSCTL_HANDLER_ARGS);
  218 int sysctl_dpcpu_quad(SYSCTL_HANDLER_ARGS);
  219 
  220 /*
  221  * These functions are used to add/remove an oid from the mib.
  222  */
  223 void sysctl_register_oid(struct sysctl_oid *oidp);
  224 void sysctl_register_disabled_oid(struct sysctl_oid *oidp);
  225 void sysctl_enable_oid(struct sysctl_oid *oidp);
  226 void sysctl_unregister_oid(struct sysctl_oid *oidp);
  227 
  228 /* Declare a static oid to allow child oids to be added to it. */
  229 #define SYSCTL_DECL(name)                       \
  230         extern struct sysctl_oid sysctl__##name
  231 
  232 /* Hide these in macros. */
  233 #define SYSCTL_CHILDREN(oid_ptr)                (&(oid_ptr)->oid_children)
  234 #define SYSCTL_PARENT(oid_ptr)                                  \
  235     (((oid_ptr)->oid_parent != &sysctl__children) ?             \
  236         __containerof((oid_ptr)->oid_parent, struct sysctl_oid, \
  237         oid_children) : (struct sysctl_oid *)NULL)
  238 #define SYSCTL_STATIC_CHILDREN(oid_name)        (&sysctl__##oid_name.oid_children)
  239 
  240 /* === Structs and macros related to context handling. === */
  241 
  242 /* All dynamically created sysctls can be tracked in a context list. */
  243 struct sysctl_ctx_entry {
  244         struct sysctl_oid *entry;
  245         TAILQ_ENTRY(sysctl_ctx_entry) link;
  246 };
  247 
  248 TAILQ_HEAD(sysctl_ctx_list, sysctl_ctx_entry);
  249 
  250 #define SYSCTL_NODE_CHILDREN(parent, name) \
  251         sysctl__##parent##_##name.oid_children
  252 
  253 #ifndef NO_SYSCTL_DESCR
  254 #define __DESCR(d) d
  255 #else
  256 #define __DESCR(d) ""
  257 #endif
  258 
  259 /* This macro is only for internal use */
  260 #define SYSCTL_OID_RAW(id, parent_child_head, nbr, name, kind, a1, a2, handler, fmt, descr) \
  261         struct sysctl_oid id = {                                        \
  262                 .oid_parent = (parent_child_head),                      \
  263                 .oid_children = SLIST_HEAD_INITIALIZER(&id.oid_children), \
  264                 .oid_number = (nbr),                                    \
  265                 .oid_kind = (kind),                                     \
  266                 .oid_arg1 = (a1),                                       \
  267                 .oid_arg2 = (a2),                                       \
  268                 .oid_name = (name),                                     \
  269                 .oid_handler = (handler),                               \
  270                 .oid_fmt = (fmt),                                       \
  271                 .oid_descr = __DESCR(descr)                             \
  272         };                                                              \
  273         DATA_SET(sysctl_set, id)
  274 
  275 /* This constructs a static "raw" MIB oid. */
  276 #define SYSCTL_OID(parent, nbr, name, kind, a1, a2, handler, fmt, descr) \
  277     static SYSCTL_OID_RAW(sysctl__##parent##_##name, \
  278         SYSCTL_CHILDREN(&sysctl__##parent), \
  279         nbr, #name, kind, a1, a2, handler, fmt, descr)
  280 
  281 /* This constructs a global "raw" MIB oid. */
  282 #define SYSCTL_OID_GLOBAL(parent, nbr, name, kind, a1, a2, handler, fmt, descr) \
  283     SYSCTL_OID_RAW(sysctl__##parent##_##name, \
  284         SYSCTL_CHILDREN(&sysctl__##parent),     \
  285         nbr, #name, kind, a1, a2, handler, fmt, descr)
  286 
  287 #define SYSCTL_ADD_OID(ctx, parent, nbr, name, kind, a1, a2, handler, fmt, descr) \
  288         sysctl_add_oid(ctx, parent, nbr, name, kind, a1, a2, handler, fmt, __DESCR(descr))
  289 
  290 /* This constructs a root node from which other nodes can hang. */
  291 #define SYSCTL_ROOT_NODE(nbr, name, access, handler, descr)     \
  292         SYSCTL_OID_RAW(sysctl___##name, &sysctl__children,      \
  293             nbr, #name, CTLTYPE_NODE|(access), NULL, 0,         \
  294             handler, "N", descr);                               \
  295         CTASSERT(((access) & CTLTYPE) == 0 ||                   \
  296             ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_NODE)
  297 
  298 /* This constructs a node from which other oids can hang. */
  299 #define SYSCTL_NODE(parent, nbr, name, access, handler, descr)          \
  300         SYSCTL_OID_GLOBAL(parent, nbr, name, CTLTYPE_NODE|(access),     \
  301             NULL, 0, handler, "N", descr);                              \
  302         CTASSERT(((access) & CTLTYPE) == 0 ||                           \
  303             ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_NODE)
  304 
  305 #define SYSCTL_ADD_NODE(ctx, parent, nbr, name, access, handler, descr) \
  306 ({                                                                      \
  307         CTASSERT(((access) & CTLTYPE) == 0 ||                           \
  308             ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_NODE);        \
  309         sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_NODE|(access),   \
  310             NULL, 0, handler, "N", __DESCR(descr));                     \
  311 })
  312 
  313 #define SYSCTL_ADD_ROOT_NODE(ctx, nbr, name, access, handler, descr)    \
  314 ({                                                                      \
  315         CTASSERT(((access) & CTLTYPE) == 0 ||                           \
  316             ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_NODE);        \
  317         sysctl_add_oid(ctx, &sysctl__children, nbr, name,               \
  318             CTLTYPE_NODE|(access),                                      \
  319             NULL, 0, handler, "N", __DESCR(descr));                     \
  320 })
  321 
  322 /* Oid for a string.  len can be 0 to indicate '\0' termination. */
  323 #define SYSCTL_STRING(parent, nbr, name, access, arg, len, descr)       \
  324         SYSCTL_OID(parent, nbr, name, CTLTYPE_STRING|(access),          \
  325             arg, len, sysctl_handle_string, "A", descr);                \
  326         CTASSERT(((access) & CTLTYPE) == 0 ||                           \
  327             ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_STRING)
  328 
  329 #define SYSCTL_ADD_STRING(ctx, parent, nbr, name, access, arg, len, descr) \
  330 ({                                                                      \
  331         char *__arg = (arg);                                            \
  332         CTASSERT(((access) & CTLTYPE) == 0 ||                           \
  333             ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_STRING);      \
  334         sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_STRING|(access), \
  335             __arg, len, sysctl_handle_string, "A", __DESCR(descr));     \
  336 })
  337 
  338 /* Oid for a constant '\0' terminated string. */
  339 #define SYSCTL_CONST_STRING(parent, nbr, name, access, arg, descr)      \
  340         SYSCTL_OID(parent, nbr, name, CTLTYPE_STRING|(access),          \
  341             __DECONST(char *, arg), 0, sysctl_handle_string, "A", descr); \
  342         CTASSERT(!(access & CTLFLAG_WR));                               \
  343         CTASSERT(((access) & CTLTYPE) == 0 ||                           \
  344             ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_STRING)
  345 
  346 #define SYSCTL_ADD_CONST_STRING(ctx, parent, nbr, name, access, arg, descr) \
  347 ({                                                                      \
  348         char *__arg = __DECONST(char *, arg);                           \
  349         CTASSERT(!(access & CTLFLAG_WR));                               \
  350         CTASSERT(((access) & CTLTYPE) == 0 ||                           \
  351             ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_STRING);      \
  352         sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_STRING|(access), \
  353             __arg, 0, sysctl_handle_string, "A", __DESCR(descr));       \
  354 })
  355 
  356 /* Oid for a bool.  If ptr is NULL, val is returned. */
  357 #define SYSCTL_NULL_BOOL_PTR ((bool *)NULL)
  358 #define SYSCTL_BOOL(parent, nbr, name, access, ptr, val, descr) \
  359         SYSCTL_OID(parent, nbr, name,                           \
  360             CTLTYPE_U8 | CTLFLAG_MPSAFE | (access),             \
  361             ptr, val, sysctl_handle_bool, "CU", descr);         \
  362         CTASSERT(((access) & CTLTYPE) == 0 &&                   \
  363             sizeof(bool) == sizeof(*(ptr)))
  364 
  365 #define SYSCTL_ADD_BOOL(ctx, parent, nbr, name, access, ptr, val, descr) \
  366 ({                                                                      \
  367         bool *__ptr = (ptr);                                            \
  368         CTASSERT(((access) & CTLTYPE) == 0);                            \
  369         sysctl_add_oid(ctx, parent, nbr, name,                          \
  370             CTLTYPE_U8 | CTLFLAG_MPSAFE | (access),                     \
  371             __ptr, val, sysctl_handle_bool, "CU", __DESCR(descr));      \
  372 })
  373 
  374 /* Oid for a signed 8-bit int.  If ptr is NULL, val is returned. */
  375 #define SYSCTL_NULL_S8_PTR ((int8_t *)NULL)
  376 #define SYSCTL_S8(parent, nbr, name, access, ptr, val, descr)   \
  377         SYSCTL_OID(parent, nbr, name,                           \
  378             CTLTYPE_S8 | CTLFLAG_MPSAFE | (access),             \
  379             ptr, val, sysctl_handle_8, "C", descr);             \
  380         CTASSERT((((access) & CTLTYPE) == 0 ||                  \
  381             ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_S8) && \
  382             sizeof(int8_t) == sizeof(*(ptr)))
  383 
  384 #define SYSCTL_ADD_S8(ctx, parent, nbr, name, access, ptr, val, descr)  \
  385 ({                                                                      \
  386         int8_t *__ptr = (ptr);                                          \
  387         CTASSERT(((access) & CTLTYPE) == 0 ||                           \
  388             ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_S8);          \
  389         sysctl_add_oid(ctx, parent, nbr, name,                          \
  390             CTLTYPE_S8 | CTLFLAG_MPSAFE | (access),                     \
  391             __ptr, val, sysctl_handle_8, "C", __DESCR(descr));  \
  392 })
  393 
  394 /* Oid for an unsigned 8-bit int.  If ptr is NULL, val is returned. */
  395 #define SYSCTL_NULL_U8_PTR ((uint8_t *)NULL)
  396 #define SYSCTL_U8(parent, nbr, name, access, ptr, val, descr)   \
  397         SYSCTL_OID(parent, nbr, name,                           \
  398             CTLTYPE_U8 | CTLFLAG_MPSAFE | (access),             \
  399             ptr, val, sysctl_handle_8, "CU", descr);            \
  400         CTASSERT((((access) & CTLTYPE) == 0 ||                  \
  401             ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_U8) && \
  402             sizeof(uint8_t) == sizeof(*(ptr)))
  403 
  404 #define SYSCTL_ADD_U8(ctx, parent, nbr, name, access, ptr, val, descr)  \
  405 ({                                                                      \
  406         uint8_t *__ptr = (ptr);                                         \
  407         CTASSERT(((access) & CTLTYPE) == 0 ||                           \
  408             ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_U8);          \
  409         sysctl_add_oid(ctx, parent, nbr, name,                          \
  410             CTLTYPE_U8 | CTLFLAG_MPSAFE | (access),                     \
  411             __ptr, val, sysctl_handle_8, "CU", __DESCR(descr)); \
  412 })
  413 
  414 /* Oid for a signed 16-bit int.  If ptr is NULL, val is returned. */
  415 #define SYSCTL_NULL_S16_PTR ((int16_t *)NULL)
  416 #define SYSCTL_S16(parent, nbr, name, access, ptr, val, descr)  \
  417         SYSCTL_OID(parent, nbr, name,                           \
  418             CTLTYPE_S16 | CTLFLAG_MPSAFE | (access),            \
  419             ptr, val, sysctl_handle_16, "S", descr);            \
  420         CTASSERT((((access) & CTLTYPE) == 0 ||                  \
  421             ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_S16) && \
  422             sizeof(int16_t) == sizeof(*(ptr)))
  423 
  424 #define SYSCTL_ADD_S16(ctx, parent, nbr, name, access, ptr, val, descr) \
  425 ({                                                                      \
  426         int16_t *__ptr = (ptr);                                         \
  427         CTASSERT(((access) & CTLTYPE) == 0 ||                           \
  428             ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_S16);         \
  429         sysctl_add_oid(ctx, parent, nbr, name,                          \
  430             CTLTYPE_S16 | CTLFLAG_MPSAFE | (access),                    \
  431             __ptr, val, sysctl_handle_16, "S", __DESCR(descr)); \
  432 })
  433 
  434 /* Oid for an unsigned 16-bit int.  If ptr is NULL, val is returned. */
  435 #define SYSCTL_NULL_U16_PTR ((uint16_t *)NULL)
  436 #define SYSCTL_U16(parent, nbr, name, access, ptr, val, descr)  \
  437         SYSCTL_OID(parent, nbr, name,                           \
  438             CTLTYPE_U16 | CTLFLAG_MPSAFE | (access),            \
  439             ptr, val, sysctl_handle_16, "SU", descr);           \
  440         CTASSERT((((access) & CTLTYPE) == 0 ||                  \
  441             ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_U16) && \
  442             sizeof(uint16_t) == sizeof(*(ptr)))
  443 
  444 #define SYSCTL_ADD_U16(ctx, parent, nbr, name, access, ptr, val, descr) \
  445 ({                                                                      \
  446         uint16_t *__ptr = (ptr);                                        \
  447         CTASSERT(((access) & CTLTYPE) == 0 ||                           \
  448             ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_U16);         \
  449         sysctl_add_oid(ctx, parent, nbr, name,                          \
  450             CTLTYPE_U16 | CTLFLAG_MPSAFE | (access),                    \
  451             __ptr, val, sysctl_handle_16, "SU", __DESCR(descr));        \
  452 })
  453 
  454 /* Oid for a signed 32-bit int.  If ptr is NULL, val is returned. */
  455 #define SYSCTL_NULL_S32_PTR ((int32_t *)NULL)
  456 #define SYSCTL_S32(parent, nbr, name, access, ptr, val, descr)  \
  457         SYSCTL_OID(parent, nbr, name,                           \
  458             CTLTYPE_S32 | CTLFLAG_MPSAFE | (access),            \
  459             ptr, val, sysctl_handle_32, "I", descr);            \
  460         CTASSERT((((access) & CTLTYPE) == 0 ||                  \
  461             ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_S32) && \
  462             sizeof(int32_t) == sizeof(*(ptr)))
  463 
  464 #define SYSCTL_ADD_S32(ctx, parent, nbr, name, access, ptr, val, descr) \
  465 ({                                                                      \
  466         int32_t *__ptr = (ptr);                                         \
  467         CTASSERT(((access) & CTLTYPE) == 0 ||                           \
  468             ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_S32);         \
  469         sysctl_add_oid(ctx, parent, nbr, name,                          \
  470             CTLTYPE_S32 | CTLFLAG_MPSAFE | (access),                    \
  471             __ptr, val, sysctl_handle_32, "I", __DESCR(descr)); \
  472 })
  473 
  474 /* Oid for an unsigned 32-bit int.  If ptr is NULL, val is returned. */
  475 #define SYSCTL_NULL_U32_PTR ((uint32_t *)NULL)
  476 #define SYSCTL_U32(parent, nbr, name, access, ptr, val, descr)  \
  477         SYSCTL_OID(parent, nbr, name,                           \
  478             CTLTYPE_U32 | CTLFLAG_MPSAFE | (access),            \
  479             ptr, val, sysctl_handle_32, "IU", descr);           \
  480         CTASSERT((((access) & CTLTYPE) == 0 ||                  \
  481             ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_U32) && \
  482             sizeof(uint32_t) == sizeof(*(ptr)))
  483 
  484 #define SYSCTL_ADD_U32(ctx, parent, nbr, name, access, ptr, val, descr) \
  485 ({                                                                      \
  486         uint32_t *__ptr = (ptr);                                        \
  487         CTASSERT(((access) & CTLTYPE) == 0 ||                           \
  488             ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_U32);         \
  489         sysctl_add_oid(ctx, parent, nbr, name,                          \
  490             CTLTYPE_U32 | CTLFLAG_MPSAFE | (access),                    \
  491             __ptr, val, sysctl_handle_32, "IU", __DESCR(descr));        \
  492 })
  493 
  494 /* Oid for a signed 64-bit int.  If ptr is NULL, val is returned. */
  495 #define SYSCTL_NULL_S64_PTR ((int64_t *)NULL)
  496 #define SYSCTL_S64(parent, nbr, name, access, ptr, val, descr)  \
  497         SYSCTL_OID(parent, nbr, name,                           \
  498             CTLTYPE_S64 | CTLFLAG_MPSAFE | (access),            \
  499             ptr, val, sysctl_handle_64, "Q", descr);            \
  500         CTASSERT((((access) & CTLTYPE) == 0 ||                  \
  501             ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_S64) && \
  502             sizeof(int64_t) == sizeof(*(ptr)))
  503 
  504 #define SYSCTL_ADD_S64(ctx, parent, nbr, name, access, ptr, val, descr) \
  505 ({                                                                      \
  506         int64_t *__ptr = (ptr);                                         \
  507         CTASSERT(((access) & CTLTYPE) == 0 ||                           \
  508             ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_S64);         \
  509         sysctl_add_oid(ctx, parent, nbr, name,                          \
  510             CTLTYPE_S64 | CTLFLAG_MPSAFE | (access),                    \
  511             __ptr, val, sysctl_handle_64, "Q", __DESCR(descr)); \
  512 })
  513 
  514 /* Oid for an unsigned 64-bit int.  If ptr is NULL, val is returned. */
  515 #define SYSCTL_NULL_U64_PTR ((uint64_t *)NULL)
  516 #define SYSCTL_U64(parent, nbr, name, access, ptr, val, descr)  \
  517         SYSCTL_OID(parent, nbr, name,                           \
  518             CTLTYPE_U64 | CTLFLAG_MPSAFE | (access),            \
  519             ptr, val, sysctl_handle_64, "QU", descr);           \
  520         CTASSERT((((access) & CTLTYPE) == 0 ||                  \
  521             ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_U64) && \
  522             sizeof(uint64_t) == sizeof(*(ptr)))
  523 
  524 #define SYSCTL_ADD_U64(ctx, parent, nbr, name, access, ptr, val, descr) \
  525 ({                                                                      \
  526         uint64_t *__ptr = (ptr);                                        \
  527         CTASSERT(((access) & CTLTYPE) == 0 ||                           \
  528             ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_U64);         \
  529         sysctl_add_oid(ctx, parent, nbr, name,                          \
  530             CTLTYPE_U64 | CTLFLAG_MPSAFE | (access),                    \
  531             __ptr, val, sysctl_handle_64, "QU", __DESCR(descr));        \
  532 })
  533 
  534 /* Oid for an int.  If ptr is SYSCTL_NULL_INT_PTR, val is returned. */
  535 #define SYSCTL_NULL_INT_PTR ((int *)NULL)
  536 #define SYSCTL_INT(parent, nbr, name, access, ptr, val, descr)  \
  537         SYSCTL_OID(parent, nbr, name,                           \
  538             CTLTYPE_INT | CTLFLAG_MPSAFE | (access),            \
  539             ptr, val, sysctl_handle_int, "I", descr);           \
  540         CTASSERT((((access) & CTLTYPE) == 0 ||                  \
  541             ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_INT) && \
  542             sizeof(int) == sizeof(*(ptr)))
  543 
  544 #define SYSCTL_ADD_INT(ctx, parent, nbr, name, access, ptr, val, descr) \
  545 ({                                                                      \
  546         int *__ptr = (ptr);                                             \
  547         CTASSERT(((access) & CTLTYPE) == 0 ||                           \
  548             ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_INT);         \
  549         sysctl_add_oid(ctx, parent, nbr, name,                          \
  550             CTLTYPE_INT | CTLFLAG_MPSAFE | (access),                    \
  551             __ptr, val, sysctl_handle_int, "I", __DESCR(descr));        \
  552 })
  553 
  554 /* Oid for an unsigned int.  If ptr is NULL, val is returned. */
  555 #define SYSCTL_NULL_UINT_PTR ((unsigned *)NULL)
  556 #define SYSCTL_UINT(parent, nbr, name, access, ptr, val, descr) \
  557         SYSCTL_OID(parent, nbr, name,                           \
  558             CTLTYPE_UINT | CTLFLAG_MPSAFE | (access),           \
  559             ptr, val, sysctl_handle_int, "IU", descr);          \
  560         CTASSERT((((access) & CTLTYPE) == 0 ||                  \
  561             ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_UINT) && \
  562             sizeof(unsigned) == sizeof(*(ptr)))
  563 
  564 #define SYSCTL_ADD_UINT(ctx, parent, nbr, name, access, ptr, val, descr) \
  565 ({                                                                      \
  566         unsigned *__ptr = (ptr);                                        \
  567         CTASSERT(((access) & CTLTYPE) == 0 ||                           \
  568             ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_UINT);        \
  569         sysctl_add_oid(ctx, parent, nbr, name,                          \
  570             CTLTYPE_UINT | CTLFLAG_MPSAFE | (access),                   \
  571             __ptr, val, sysctl_handle_int, "IU", __DESCR(descr));       \
  572 })
  573 
  574 /* Oid for a long.  The pointer must be non NULL. */
  575 #define SYSCTL_NULL_LONG_PTR ((long *)NULL)
  576 #define SYSCTL_LONG(parent, nbr, name, access, ptr, val, descr) \
  577         SYSCTL_OID(parent, nbr, name,                           \
  578             CTLTYPE_LONG | CTLFLAG_MPSAFE | (access),           \
  579             ptr, val, sysctl_handle_long, "L", descr);          \
  580         CTASSERT((((access) & CTLTYPE) == 0 ||                  \
  581             ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_LONG) && \
  582             sizeof(long) == sizeof(*(ptr)))
  583 
  584 #define SYSCTL_ADD_LONG(ctx, parent, nbr, name, access, ptr, descr)     \
  585 ({                                                                      \
  586         long *__ptr = (ptr);                                            \
  587         CTASSERT(((access) & CTLTYPE) == 0 ||                           \
  588             ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_LONG);        \
  589         sysctl_add_oid(ctx, parent, nbr, name,                          \
  590             CTLTYPE_LONG | CTLFLAG_MPSAFE | (access),                   \
  591             __ptr, 0, sysctl_handle_long, "L", __DESCR(descr));         \
  592 })
  593 
  594 /* Oid for an unsigned long.  The pointer must be non NULL. */
  595 #define SYSCTL_NULL_ULONG_PTR ((unsigned long *)NULL)
  596 #define SYSCTL_ULONG(parent, nbr, name, access, ptr, val, descr)        \
  597         SYSCTL_OID(parent, nbr, name,                                   \
  598             CTLTYPE_ULONG | CTLFLAG_MPSAFE | (access),                  \
  599             ptr, val, sysctl_handle_long, "LU", descr);                 \
  600         CTASSERT((((access) & CTLTYPE) == 0 ||                          \
  601             ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_ULONG) &&     \
  602             sizeof(unsigned long) == sizeof(*(ptr)))
  603 
  604 #define SYSCTL_ADD_ULONG(ctx, parent, nbr, name, access, ptr, descr)    \
  605 ({                                                                      \
  606         unsigned long *__ptr = (ptr);                                   \
  607         CTASSERT(((access) & CTLTYPE) == 0 ||                           \
  608             ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_ULONG);       \
  609         sysctl_add_oid(ctx, parent, nbr, name,                          \
  610             CTLTYPE_ULONG | CTLFLAG_MPSAFE | (access),                  \
  611             __ptr, 0, sysctl_handle_long, "LU", __DESCR(descr));        \
  612 })
  613 
  614 /* Oid for a quad.  The pointer must be non NULL. */
  615 #define SYSCTL_NULL_QUAD_PTR ((int64_t *)NULL)
  616 #define SYSCTL_QUAD(parent, nbr, name, access, ptr, val, descr) \
  617         SYSCTL_OID(parent, nbr, name,                           \
  618             CTLTYPE_S64 | CTLFLAG_MPSAFE | (access),            \
  619             ptr, val, sysctl_handle_64, "Q", descr);            \
  620         CTASSERT((((access) & CTLTYPE) == 0 ||                  \
  621             ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_S64) && \
  622             sizeof(int64_t) == sizeof(*(ptr)))
  623 
  624 #define SYSCTL_ADD_QUAD(ctx, parent, nbr, name, access, ptr, descr)     \
  625 ({                                                                      \
  626         int64_t *__ptr = (ptr);                                         \
  627         CTASSERT(((access) & CTLTYPE) == 0 ||                           \
  628             ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_S64);         \
  629         sysctl_add_oid(ctx, parent, nbr, name,                          \
  630             CTLTYPE_S64 | CTLFLAG_MPSAFE | (access),                    \
  631             __ptr, 0, sysctl_handle_64, "Q", __DESCR(descr));           \
  632 })
  633 
  634 #define SYSCTL_NULL_UQUAD_PTR ((uint64_t *)NULL)
  635 #define SYSCTL_UQUAD(parent, nbr, name, access, ptr, val, descr)        \
  636         SYSCTL_OID(parent, nbr, name,                                   \
  637             CTLTYPE_U64 | CTLFLAG_MPSAFE | (access),                    \
  638              ptr, val, sysctl_handle_64, "QU", descr);                  \
  639         CTASSERT((((access) & CTLTYPE) == 0 ||                          \
  640             ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_U64) &&       \
  641             sizeof(uint64_t) == sizeof(*(ptr)))
  642 
  643 #define SYSCTL_ADD_UQUAD(ctx, parent, nbr, name, access, ptr, descr)    \
  644 ({                                                                      \
  645         uint64_t *__ptr = (ptr);                                        \
  646         CTASSERT(((access) & CTLTYPE) == 0 ||                           \
  647             ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_U64);         \
  648         sysctl_add_oid(ctx, parent, nbr, name,                          \
  649             CTLTYPE_U64 | CTLFLAG_MPSAFE | (access),                    \
  650             __ptr, 0, sysctl_handle_64, "QU", __DESCR(descr));          \
  651 })
  652 
  653 /* Oid for a CPU dependent variable */
  654 #define SYSCTL_ADD_UAUTO(ctx, parent, nbr, name, access, ptr, descr)    \
  655 ({                                                                      \
  656         struct sysctl_oid *__ret;                                       \
  657         CTASSERT((sizeof(uint64_t) == sizeof(*(ptr)) ||                 \
  658             sizeof(unsigned) == sizeof(*(ptr))) &&                      \
  659             ((access) & CTLTYPE) == 0);                                 \
  660         if (sizeof(uint64_t) == sizeof(*(ptr))) {                       \
  661                 __ret = sysctl_add_oid(ctx, parent, nbr, name,          \
  662                     CTLTYPE_U64 | CTLFLAG_MPSAFE | (access),            \
  663                     (ptr), 0, sysctl_handle_64, "QU",                   \
  664                     __DESCR(descr));                                    \
  665         } else {                                                        \
  666                 __ret = sysctl_add_oid(ctx, parent, nbr, name,          \
  667                     CTLTYPE_UINT | CTLFLAG_MPSAFE | (access),           \
  668                     (ptr), 0, sysctl_handle_int, "IU",                  \
  669                     __DESCR(descr));                                    \
  670         }                                                               \
  671         __ret;                                                          \
  672 })
  673 
  674 /* Oid for a 64-bit unsigned counter(9).  The pointer must be non NULL. */
  675 #define SYSCTL_COUNTER_U64(parent, nbr, name, access, ptr, descr)       \
  676         SYSCTL_OID(parent, nbr, name,                                   \
  677             CTLTYPE_U64 | CTLFLAG_MPSAFE | (access),                    \
  678             (ptr), 0, sysctl_handle_counter_u64, "QU", descr);          \
  679         CTASSERT((((access) & CTLTYPE) == 0 ||                          \
  680             ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_U64) &&       \
  681             sizeof(counter_u64_t) == sizeof(*(ptr)) &&                  \
  682             sizeof(uint64_t) == sizeof(**(ptr)))
  683 
  684 #define SYSCTL_ADD_COUNTER_U64(ctx, parent, nbr, name, access, ptr, descr) \
  685 ({                                                                      \
  686         counter_u64_t *__ptr = (ptr);                                   \
  687         CTASSERT(((access) & CTLTYPE) == 0 ||                           \
  688             ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_U64);         \
  689         sysctl_add_oid(ctx, parent, nbr, name,                          \
  690             CTLTYPE_U64 | CTLFLAG_MPSAFE | (access),                    \
  691             __ptr, 0, sysctl_handle_counter_u64, "QU", __DESCR(descr)); \
  692 })
  693 
  694 /* Oid for an array of counter(9)s.  The pointer and length must be non zero. */
  695 #define SYSCTL_COUNTER_U64_ARRAY(parent, nbr, name, access, ptr, len, descr) \
  696         SYSCTL_OID(parent, nbr, name,                                   \
  697             CTLTYPE_OPAQUE | CTLFLAG_MPSAFE | (access),                 \
  698             (ptr), (len), sysctl_handle_counter_u64_array, "S", descr); \
  699         CTASSERT((((access) & CTLTYPE) == 0 ||                          \
  700             ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_OPAQUE) &&    \
  701             sizeof(counter_u64_t) == sizeof(*(ptr)) &&                  \
  702             sizeof(uint64_t) == sizeof(**(ptr)))
  703 
  704 #define SYSCTL_ADD_COUNTER_U64_ARRAY(ctx, parent, nbr, name, access,    \
  705     ptr, len, descr)                                                    \
  706 ({                                                                      \
  707         counter_u64_t *__ptr = (ptr);                                   \
  708         CTASSERT(((access) & CTLTYPE) == 0 ||                           \
  709             ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_OPAQUE);      \
  710         sysctl_add_oid(ctx, parent, nbr, name,                          \
  711             CTLTYPE_OPAQUE | CTLFLAG_MPSAFE | (access),                 \
  712             __ptr, len, sysctl_handle_counter_u64_array, "S",           \
  713             __DESCR(descr));                                            \
  714 })
  715 
  716 /* Oid for an opaque object.  Specified by a pointer and a length. */
  717 #define SYSCTL_OPAQUE(parent, nbr, name, access, ptr, len, fmt, descr)  \
  718         SYSCTL_OID(parent, nbr, name, CTLTYPE_OPAQUE|(access),          \
  719             ptr, len, sysctl_handle_opaque, fmt, descr);                \
  720         CTASSERT(((access) & CTLTYPE) == 0 ||                           \
  721             ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_OPAQUE)
  722 
  723 #define SYSCTL_ADD_OPAQUE(ctx, parent, nbr, name, access, ptr, len, fmt, descr) \
  724 ({                                                                      \
  725         CTASSERT(((access) & CTLTYPE) == 0 ||                           \
  726             ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_OPAQUE);      \
  727         sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_OPAQUE|(access), \
  728             ptr, len, sysctl_handle_opaque, fmt, __DESCR(descr));       \
  729 })
  730 
  731 /* Oid for a struct.  Specified by a pointer and a type. */
  732 #define SYSCTL_STRUCT(parent, nbr, name, access, ptr, type, descr)      \
  733         SYSCTL_OID(parent, nbr, name, CTLTYPE_OPAQUE|(access),          \
  734             ptr, sizeof(struct type), sysctl_handle_opaque,             \
  735             "S," #type, descr);                                         \
  736         CTASSERT(((access) & CTLTYPE) == 0 ||                           \
  737             ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_OPAQUE)
  738 
  739 #define SYSCTL_ADD_STRUCT(ctx, parent, nbr, name, access, ptr, type, descr) \
  740 ({                                                                      \
  741         CTASSERT(((access) & CTLTYPE) == 0 ||                           \
  742             ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_OPAQUE);      \
  743         sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_OPAQUE|(access), \
  744             (ptr), sizeof(struct type),                                 \
  745             sysctl_handle_opaque, "S," #type, __DESCR(descr));          \
  746 })
  747 
  748 /* Oid for a procedure.  Specified by a pointer and an arg. */
  749 #define SYSCTL_PROC(parent, nbr, name, access, ptr, arg, handler, fmt, descr) \
  750         SYSCTL_OID(parent, nbr, name, (access),                         \
  751             ptr, arg, handler, fmt, descr);                             \
  752         CTASSERT(((access) & CTLTYPE) != 0)
  753 
  754 #define SYSCTL_ADD_PROC(ctx, parent, nbr, name, access, ptr, arg, handler, fmt, descr) \
  755 ({                                                                      \
  756         CTASSERT(((access) & CTLTYPE) != 0);                            \
  757         sysctl_add_oid(ctx, parent, nbr, name, (access),                \
  758             (ptr), (arg), (handler), (fmt), __DESCR(descr));            \
  759 })
  760 
  761 /* Oid to handle limits on uma(9) zone specified by pointer. */
  762 #define SYSCTL_UMA_MAX(parent, nbr, name, access, ptr, descr)   \
  763         SYSCTL_OID(parent, nbr, name,                           \
  764             CTLTYPE_INT | CTLFLAG_MPSAFE | (access),            \
  765             (ptr), 0, sysctl_handle_uma_zone_max, "I", descr);  \
  766         CTASSERT(((access) & CTLTYPE) == 0 ||                   \
  767             ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_INT)
  768 
  769 #define SYSCTL_ADD_UMA_MAX(ctx, parent, nbr, name, access, ptr, descr)  \
  770 ({                                                                      \
  771         uma_zone_t __ptr = (ptr);                                       \
  772         CTASSERT(((access) & CTLTYPE) == 0 ||                           \
  773             ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_INT);         \
  774         sysctl_add_oid(ctx, parent, nbr, name,                          \
  775             CTLTYPE_INT | CTLFLAG_MPSAFE | (access),                    \
  776             __ptr, 0, sysctl_handle_uma_zone_max, "I", __DESCR(descr)); \
  777 })
  778 
  779 /* Oid to obtain current use of uma(9) zone specified by pointer. */
  780 #define SYSCTL_UMA_CUR(parent, nbr, name, access, ptr, descr)           \
  781         SYSCTL_OID(parent, nbr, name,                                   \
  782             CTLTYPE_INT | CTLFLAG_MPSAFE | CTLFLAG_RD | (access),       \
  783             (ptr), 0, sysctl_handle_uma_zone_cur, "I", descr);          \
  784         CTASSERT(((access) & CTLTYPE) == 0 ||                           \
  785             ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_INT)
  786 
  787 #define SYSCTL_ADD_UMA_CUR(ctx, parent, nbr, name, access, ptr, descr)  \
  788 ({                                                                      \
  789         uma_zone_t __ptr = (ptr);                                       \
  790         CTASSERT(((access) & CTLTYPE) == 0 ||                           \
  791             ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_INT);         \
  792         sysctl_add_oid(ctx, parent, nbr, name,                          \
  793             CTLTYPE_INT | CTLFLAG_MPSAFE | CTLFLAG_RD | (access),       \
  794             __ptr, 0, sysctl_handle_uma_zone_cur, "I", __DESCR(descr)); \
  795 })
  796 
  797 /* OID expressing a struct timeval as seconds */
  798 #define SYSCTL_TIMEVAL_SEC(parent, nbr, name, access, ptr, descr)       \
  799         SYSCTL_OID(parent, nbr, name,                                   \
  800             CTLTYPE_INT | CTLFLAG_MPSAFE | CTLFLAG_RD | (access),       \
  801             (ptr), 0, sysctl_sec_to_timeval, "I", descr);               \
  802         CTASSERT(((access) & CTLTYPE) == 0 ||                           \
  803             ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_INT)
  804 #define SYSCTL_ADD_TIMEVAL_SEC(ctx, parent, nbr, name, access, ptr, descr) \
  805 ({                                                                      \
  806         struct timeval *__ptr = (ptr);                                  \
  807         CTASSERT(((access) & CTLTYPE) == 0 ||                           \
  808             ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_INT);         \
  809         sysctl_add_oid(ctx, parent, nbr, name,                          \
  810             CTLTYPE_INT | CTLFLAG_MPSAFE | CTLFLAG_RD | (access),       \
  811             __ptr, 0, sysctl_sec_to_timeval, "I", __DESCR(descr),       \
  812             NULL);                                                      \
  813 })
  814 
  815 /*
  816  * A macro to generate a read-only sysctl to indicate the presence of optional
  817  * kernel features.
  818  */
  819 #define FEATURE(name, desc)                                             \
  820         SYSCTL_INT(_kern_features, OID_AUTO, name, CTLFLAG_RD | CTLFLAG_CAPRD, \
  821             SYSCTL_NULL_INT_PTR, 1, desc)
  822 
  823 #endif /* _KERNEL */
  824 
  825 /*
  826  * Top-level identifiers
  827  */
  828 #define CTL_UNSPEC      0               /* unused */
  829 #define CTL_KERN        1               /* "high kernel": proc, limits */
  830 #define CTL_VM          2               /* virtual memory */
  831 #define CTL_VFS         3               /* filesystem, mount type is next */
  832 #define CTL_NET         4               /* network, see socket.h */
  833 #define CTL_DEBUG       5               /* debugging parameters */
  834 #define CTL_HW          6               /* generic cpu/io */
  835 #define CTL_MACHDEP     7               /* machine dependent */
  836 #define CTL_USER        8               /* user-level */
  837 #define CTL_P1003_1B    9               /* POSIX 1003.1B */
  838 
  839 /*
  840  * CTL_KERN identifiers
  841  */
  842 #define KERN_OSTYPE              1      /* string: system version */
  843 #define KERN_OSRELEASE           2      /* string: system release */
  844 #define KERN_OSREV               3      /* int: system revision */
  845 #define KERN_VERSION             4      /* string: compile time info */
  846 #define KERN_MAXVNODES           5      /* int: max vnodes */
  847 #define KERN_MAXPROC             6      /* int: max processes */
  848 #define KERN_MAXFILES            7      /* int: max open files */
  849 #define KERN_ARGMAX              8      /* int: max arguments to exec */
  850 #define KERN_SECURELVL           9      /* int: system security level */
  851 #define KERN_HOSTNAME           10      /* string: hostname */
  852 #define KERN_HOSTID             11      /* int: host identifier */
  853 #define KERN_CLOCKRATE          12      /* struct: struct clockrate */
  854 #define KERN_VNODE              13      /* struct: vnode structures */
  855 #define KERN_PROC               14      /* struct: process entries */
  856 #define KERN_FILE               15      /* struct: file entries */
  857 #define KERN_PROF               16      /* node: kernel profiling info */
  858 #define KERN_POSIX1             17      /* int: POSIX.1 version */
  859 #define KERN_NGROUPS            18      /* int: # of supplemental group ids */
  860 #define KERN_JOB_CONTROL        19      /* int: is job control available */
  861 #define KERN_SAVED_IDS          20      /* int: saved set-user/group-ID */
  862 #define KERN_BOOTTIME           21      /* struct: time kernel was booted */
  863 #define KERN_NISDOMAINNAME      22      /* string: YP domain name */
  864 #define KERN_UPDATEINTERVAL     23      /* int: update process sleep time */
  865 #define KERN_OSRELDATE          24      /* int: kernel release date */
  866 #define KERN_NTP_PLL            25      /* node: NTP PLL control */
  867 #define KERN_BOOTFILE           26      /* string: name of booted kernel */
  868 #define KERN_MAXFILESPERPROC    27      /* int: max open files per proc */
  869 #define KERN_MAXPROCPERUID      28      /* int: max processes per uid */
  870 #define KERN_DUMPDEV            29      /* struct cdev *: device to dump on */
  871 #define KERN_IPC                30      /* node: anything related to IPC */
  872 #define KERN_DUMMY              31      /* unused */
  873 #define KERN_PS_STRINGS         32      /* int: address of PS_STRINGS */
  874 #define KERN_USRSTACK           33      /* int: address of USRSTACK */
  875 #define KERN_LOGSIGEXIT         34      /* int: do we log sigexit procs? */
  876 #define KERN_IOV_MAX            35      /* int: value of UIO_MAXIOV */
  877 #define KERN_HOSTUUID           36      /* string: host UUID identifier */
  878 #define KERN_ARND               37      /* int: from arc4rand() */
  879 /*
  880  * KERN_PROC subtypes
  881  */
  882 #define KERN_PROC_ALL           0       /* everything */
  883 #define KERN_PROC_PID           1       /* by process id */
  884 #define KERN_PROC_PGRP          2       /* by process group id */
  885 #define KERN_PROC_SESSION       3       /* by session of pid */
  886 #define KERN_PROC_TTY           4       /* by controlling tty */
  887 #define KERN_PROC_UID           5       /* by effective uid */
  888 #define KERN_PROC_RUID          6       /* by real uid */
  889 #define KERN_PROC_ARGS          7       /* get/set arguments/proctitle */
  890 #define KERN_PROC_PROC          8       /* only return procs */
  891 #define KERN_PROC_SV_NAME       9       /* get syscall vector name */
  892 #define KERN_PROC_RGID          10      /* by real group id */
  893 #define KERN_PROC_GID           11      /* by effective group id */
  894 #define KERN_PROC_PATHNAME      12      /* path to executable */
  895 #define KERN_PROC_OVMMAP        13      /* Old VM map entries for process */
  896 #define KERN_PROC_OFILEDESC     14      /* Old file descriptors for process */
  897 #define KERN_PROC_KSTACK        15      /* Kernel stacks for process */
  898 #define KERN_PROC_INC_THREAD    0x10    /*
  899                                          * modifier for pid, pgrp, tty,
  900                                          * uid, ruid, gid, rgid and proc
  901                                          * This effectively uses 16-31
  902                                          */
  903 #define KERN_PROC_VMMAP         32      /* VM map entries for process */
  904 #define KERN_PROC_FILEDESC      33      /* File descriptors for process */
  905 #define KERN_PROC_GROUPS        34      /* process groups */
  906 #define KERN_PROC_ENV           35      /* get environment */
  907 #define KERN_PROC_AUXV          36      /* get ELF auxiliary vector */
  908 #define KERN_PROC_RLIMIT        37      /* process resource limits */
  909 #define KERN_PROC_PS_STRINGS    38      /* get ps_strings location */
  910 #define KERN_PROC_UMASK         39      /* process umask */
  911 #define KERN_PROC_OSREL         40      /* osreldate for process binary */
  912 #define KERN_PROC_SIGTRAMP      41      /* signal trampoline location */
  913 #define KERN_PROC_CWD           42      /* process current working directory */
  914 #define KERN_PROC_NFDS          43      /* number of open file descriptors */
  915 
  916 /*
  917  * KERN_IPC identifiers
  918  */
  919 #define KIPC_MAXSOCKBUF         1       /* int: max size of a socket buffer */
  920 #define KIPC_SOCKBUF_WASTE      2       /* int: wastage factor in sockbuf */
  921 #define KIPC_SOMAXCONN          3       /* int: max length of connection q */
  922 #define KIPC_MAX_LINKHDR        4       /* int: max length of link header */
  923 #define KIPC_MAX_PROTOHDR       5       /* int: max length of network header */
  924 #define KIPC_MAX_HDR            6       /* int: max total length of headers */
  925 #define KIPC_MAX_DATALEN        7       /* int: max length of data? */
  926 
  927 /*
  928  * CTL_HW identifiers
  929  */
  930 #define HW_MACHINE       1              /* string: machine class */
  931 #define HW_MODEL         2              /* string: specific machine model */
  932 #define HW_NCPU          3              /* int: number of cpus */
  933 #define HW_BYTEORDER     4              /* int: machine byte order */
  934 #define HW_PHYSMEM       5              /* int: total memory */
  935 #define HW_USERMEM       6              /* int: non-kernel memory */
  936 #define HW_PAGESIZE      7              /* int: software page size */
  937 #define HW_DISKNAMES     8              /* strings: disk drive names */
  938 #define HW_DISKSTATS     9              /* struct: diskstats[] */
  939 #define HW_FLOATINGPT   10              /* int: has HW floating point? */
  940 #define HW_MACHINE_ARCH 11              /* string: machine architecture */
  941 #define HW_REALMEM      12              /* int: 'real' memory */
  942 
  943 /*
  944  * CTL_USER definitions
  945  */
  946 #define USER_CS_PATH             1      /* string: _CS_PATH */
  947 #define USER_BC_BASE_MAX         2      /* int: BC_BASE_MAX */
  948 #define USER_BC_DIM_MAX          3      /* int: BC_DIM_MAX */
  949 #define USER_BC_SCALE_MAX        4      /* int: BC_SCALE_MAX */
  950 #define USER_BC_STRING_MAX       5      /* int: BC_STRING_MAX */
  951 #define USER_COLL_WEIGHTS_MAX    6      /* int: COLL_WEIGHTS_MAX */
  952 #define USER_EXPR_NEST_MAX       7      /* int: EXPR_NEST_MAX */
  953 #define USER_LINE_MAX            8      /* int: LINE_MAX */
  954 #define USER_RE_DUP_MAX          9      /* int: RE_DUP_MAX */
  955 #define USER_POSIX2_VERSION     10      /* int: POSIX2_VERSION */
  956 #define USER_POSIX2_C_BIND      11      /* int: POSIX2_C_BIND */
  957 #define USER_POSIX2_C_DEV       12      /* int: POSIX2_C_DEV */
  958 #define USER_POSIX2_CHAR_TERM   13      /* int: POSIX2_CHAR_TERM */
  959 #define USER_POSIX2_FORT_DEV    14      /* int: POSIX2_FORT_DEV */
  960 #define USER_POSIX2_FORT_RUN    15      /* int: POSIX2_FORT_RUN */
  961 #define USER_POSIX2_LOCALEDEF   16      /* int: POSIX2_LOCALEDEF */
  962 #define USER_POSIX2_SW_DEV      17      /* int: POSIX2_SW_DEV */
  963 #define USER_POSIX2_UPE         18      /* int: POSIX2_UPE */
  964 #define USER_STREAM_MAX         19      /* int: POSIX2_STREAM_MAX */
  965 #define USER_TZNAME_MAX         20      /* int: POSIX2_TZNAME_MAX */
  966 
  967 #define CTL_P1003_1B_ASYNCHRONOUS_IO            1       /* boolean */
  968 #define CTL_P1003_1B_MAPPED_FILES               2       /* boolean */
  969 #define CTL_P1003_1B_MEMLOCK                    3       /* boolean */
  970 #define CTL_P1003_1B_MEMLOCK_RANGE              4       /* boolean */
  971 #define CTL_P1003_1B_MEMORY_PROTECTION          5       /* boolean */
  972 #define CTL_P1003_1B_MESSAGE_PASSING            6       /* boolean */
  973 #define CTL_P1003_1B_PRIORITIZED_IO             7       /* boolean */
  974 #define CTL_P1003_1B_PRIORITY_SCHEDULING        8       /* boolean */
  975 #define CTL_P1003_1B_REALTIME_SIGNALS           9       /* boolean */
  976 #define CTL_P1003_1B_SEMAPHORES                 10      /* boolean */
  977 #define CTL_P1003_1B_FSYNC                      11      /* boolean */
  978 #define CTL_P1003_1B_SHARED_MEMORY_OBJECTS      12      /* boolean */
  979 #define CTL_P1003_1B_SYNCHRONIZED_IO            13      /* boolean */
  980 #define CTL_P1003_1B_TIMERS                     14      /* boolean */
  981 #define CTL_P1003_1B_AIO_LISTIO_MAX             15      /* int */
  982 #define CTL_P1003_1B_AIO_MAX                    16      /* int */
  983 #define CTL_P1003_1B_AIO_PRIO_DELTA_MAX         17      /* int */
  984 #define CTL_P1003_1B_DELAYTIMER_MAX             18      /* int */
  985 #define CTL_P1003_1B_MQ_OPEN_MAX                19      /* int */
  986 #define CTL_P1003_1B_PAGESIZE                   20      /* int */
  987 #define CTL_P1003_1B_RTSIG_MAX                  21      /* int */
  988 #define CTL_P1003_1B_SEM_NSEMS_MAX              22      /* int */
  989 #define CTL_P1003_1B_SEM_VALUE_MAX              23      /* int */
  990 #define CTL_P1003_1B_SIGQUEUE_MAX               24      /* int */
  991 #define CTL_P1003_1B_TIMER_MAX                  25      /* int */
  992 
  993 #define CTL_P1003_1B_MAXID              26
  994 
  995 #ifdef _KERNEL
  996 
  997 /*
  998  * Declare some common oids.
  999  */
 1000 extern struct sysctl_oid_list sysctl__children;
 1001 SYSCTL_DECL(_kern);
 1002 SYSCTL_DECL(_kern_features);
 1003 SYSCTL_DECL(_kern_ipc);
 1004 SYSCTL_DECL(_kern_proc);
 1005 SYSCTL_DECL(_kern_sched);
 1006 SYSCTL_DECL(_kern_sched_stats);
 1007 SYSCTL_DECL(_sysctl);
 1008 SYSCTL_DECL(_vm);
 1009 SYSCTL_DECL(_vm_stats);
 1010 SYSCTL_DECL(_vm_stats_misc);
 1011 SYSCTL_DECL(_vfs);
 1012 SYSCTL_DECL(_net);
 1013 SYSCTL_DECL(_debug);
 1014 SYSCTL_DECL(_debug_sizeof);
 1015 SYSCTL_DECL(_dev);
 1016 SYSCTL_DECL(_hw);
 1017 SYSCTL_DECL(_hw_bus);
 1018 SYSCTL_DECL(_hw_bus_devices);
 1019 SYSCTL_DECL(_hw_bus_info);
 1020 SYSCTL_DECL(_machdep);
 1021 SYSCTL_DECL(_machdep_mitigations);
 1022 SYSCTL_DECL(_user);
 1023 SYSCTL_DECL(_compat);
 1024 SYSCTL_DECL(_regression);
 1025 SYSCTL_DECL(_security);
 1026 SYSCTL_DECL(_security_bsd);
 1027 
 1028 extern char     machine[];
 1029 extern char     osrelease[];
 1030 extern char     ostype[];
 1031 extern char     kern_ident[];
 1032 
 1033 /* Dynamic oid handling */
 1034 struct sysctl_oid *sysctl_add_oid(struct sysctl_ctx_list *clist,
 1035             struct sysctl_oid_list *parent, int nbr, const char *name, int kind,
 1036             void *arg1, intmax_t arg2, int (*handler)(SYSCTL_HANDLER_ARGS),
 1037             const char *fmt, const char *descr);
 1038 int     sysctl_remove_name(struct sysctl_oid *parent, const char *name, int del,
 1039             int recurse);
 1040 void    sysctl_rename_oid(struct sysctl_oid *oidp, const char *name);
 1041 int     sysctl_move_oid(struct sysctl_oid *oidp,
 1042             struct sysctl_oid_list *parent);
 1043 int     sysctl_remove_oid(struct sysctl_oid *oidp, int del, int recurse);
 1044 int     sysctl_ctx_init(struct sysctl_ctx_list *clist);
 1045 int     sysctl_ctx_free(struct sysctl_ctx_list *clist);
 1046 struct  sysctl_ctx_entry *sysctl_ctx_entry_add(struct sysctl_ctx_list *clist,
 1047             struct sysctl_oid *oidp);
 1048 struct  sysctl_ctx_entry *sysctl_ctx_entry_find(struct sysctl_ctx_list *clist,
 1049             struct sysctl_oid *oidp);
 1050 int     sysctl_ctx_entry_del(struct sysctl_ctx_list *clist,
 1051             struct sysctl_oid *oidp);
 1052 
 1053 int     kernel_sysctl(struct thread *td, int *name, u_int namelen, void *old,
 1054             size_t *oldlenp, void *new, size_t newlen, size_t *retval,
 1055             int flags);
 1056 int     kernel_sysctlbyname(struct thread *td, char *name, void *old,
 1057             size_t *oldlenp, void *new, size_t newlen, size_t *retval,
 1058             int flags);
 1059 int     userland_sysctl(struct thread *td, int *name, u_int namelen, void *old,
 1060             size_t *oldlenp, int inkernel, void *new, size_t newlen,
 1061             size_t *retval, int flags);
 1062 int     sysctl_find_oid(int *name, u_int namelen, struct sysctl_oid **noid,
 1063             int *nindx, struct sysctl_req *req);
 1064 void    sysctl_wlock(void);
 1065 void    sysctl_wunlock(void);
 1066 int     sysctl_wire_old_buffer(struct sysctl_req *req, size_t len);
 1067 
 1068 struct sbuf;
 1069 struct sbuf *sbuf_new_for_sysctl(struct sbuf *, char *, int,
 1070             struct sysctl_req *);
 1071 #else   /* !_KERNEL */
 1072 #include <sys/cdefs.h>
 1073 
 1074 __BEGIN_DECLS
 1075 int     sysctl(const int *, u_int, void *, size_t *, const void *, size_t);
 1076 int     sysctlbyname(const char *, void *, size_t *, const void *, size_t);
 1077 int     sysctlnametomib(const char *, int *, size_t *);
 1078 __END_DECLS
 1079 #endif  /* _KERNEL */
 1080 
 1081 #endif  /* !_SYS_SYSCTL_H_ */

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