xnu-4570.1.46.tar.gz

[apple/xnu.git] / bsd / sys / sysctl.h

/*
 * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 * 
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
 */
/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
/*
 * Copyright (c) 1989, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Mike Karels at Berkeley Software Design, Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)sysctl.h	8.1 (Berkeley) 6/2/93
 */
/*
 * NOTICE: This file was modified by SPARTA, Inc. in 2005 to introduce
 * support for mandatory and extensible security protections.  This notice
 * is included in support of clause 2.2 (b) of the Apple Public License,
 * Version 2.0.
 */

#ifndef _SYS_SYSCTL_H_
#define	_SYS_SYSCTL_H_

/*
 * These are for the eproc structure defined below.
 */
#include <sys/cdefs.h>

#include <sys/appleapiopts.h>
#ifndef KERNEL
#include <sys/time.h>
#include <sys/ucred.h>
#else
#ifndef XNU_KERNEL_PRIVATE
#include <libkern/sysctl.h>
#endif

#endif
#include <sys/proc.h>
#include <sys/vm.h>

#ifdef XNU_KERNEL_PRIVATE
#include <sys/linker_set.h>
#endif

/*
 * Definitions for sysctl call.  The sysctl call uses a hierarchical name
 * for objects that can be examined or modified.  The name is expressed as
 * a sequence of integers.  Like a file path name, the meaning of each
 * component depends on its place in the hierarchy.  The top-level and kern
 * identifiers are defined here, and other identifiers are defined in the
 * respective subsystem header files.
 */

#define CTL_MAXNAME	12	/* largest number of components supported */

/*
 * Each subsystem defined by sysctl defines a list of variables
 * for that subsystem. Each name is either a node with further 
 * levels defined below it, or it is a leaf of some particular
 * type given below. Each sysctl level defines a set of name/type
 * pairs to be used by sysctl(1) in manipulating the subsystem.
 *
 * When declaring new sysctl names, use the CTLFLAG_LOCKED flag in the
 * type to indicate that all necessary locking will be handled
 * within the sysctl.
 *
 * Any sysctl defined without CTLFLAG_LOCKED is considered legacy
 * and will be protected by a global mutex.
 *
 * Note:	This is not optimal, so it is best to handle locking
 *		yourself, if you are able to do so.  A simple design
 *		pattern for use to avoid in a single function known
 *		to potentially be in the paging path ot doing a DMA
 *		to physical memory in a user space process is:
 *
 *			lock
 *			perform operation vs. local buffer
 *			unlock
 *			SYSCTL_OUT(rey, local buffer, length)
 *
 *		...this assumes you are not using a deep call graph
 *		or are unable to pass a local buffer address as a
 *		parameter into your deep call graph.
 *
 *		Note that very large user buffers can fail the wire
 *		if to do so would require more physical pages than
 *		are available (the caller will get an ENOMEM error,
 *		see sysctl_mem_hold() for details).
 */
struct ctlname {
	char	*ctl_name;	/* subsystem name */
	int	ctl_type;	/* type of name */
};

#define CTLTYPE		0xf	/* Mask for the type */
#define	CTLTYPE_NODE	1	/* name is a node */
#define	CTLTYPE_INT	2	/* name describes an integer */
#define	CTLTYPE_STRING	3	/* name describes a string */
#define	CTLTYPE_QUAD	4	/* name describes a 64-bit number */
#define	CTLTYPE_OPAQUE	5	/* name describes a structure */
#define	CTLTYPE_STRUCT	CTLTYPE_OPAQUE	/* name describes a structure */

#define CTLFLAG_RD	0x80000000	/* Allow reads of variable */
#define CTLFLAG_WR	0x40000000	/* Allow writes to the variable */
#define CTLFLAG_RW	(CTLFLAG_RD|CTLFLAG_WR)
#define CTLFLAG_NOLOCK	0x20000000	/* XXX Don't Lock */
#define CTLFLAG_ANYBODY	0x10000000	/* All users can set this var */
#define CTLFLAG_SECURE	0x08000000	/* Permit set only if securelevel<=0 */
#define CTLFLAG_MASKED	0x04000000	/* deprecated variable, do not display */
#define CTLFLAG_NOAUTO	0x02000000	/* do not auto-register */
#define CTLFLAG_KERN	0x01000000	/* valid inside the kernel */
#define CTLFLAG_LOCKED	0x00800000	/* node will handle locking itself */
#define CTLFLAG_OID2	0x00400000	/* struct sysctl_oid has version info */

/*
 * USE THIS instead of a hardwired number from the categories below
 * to get dynamically assigned sysctl entries using the linker-set
 * technology. This is the way nearly all new sysctl variables should
 * be implemented.
 *
 * e.g. SYSCTL_INT(_parent, OID_AUTO, name, CTLFLAG_RW, &variable, 0, "");
 *
 * Note that linker set technology will automatically register all nodes
 * declared like this on kernel initialization, UNLESS they are defined
 * in I/O-Kit. In this case, you have to call sysctl_register_oid()
 * manually - just like in a KEXT.
 */
#define OID_AUTO	(-1)
#define OID_AUTO_START 100 /* conventional */

#ifdef KERNEL
#define SYSCTL_HANDLER_ARGS (struct sysctl_oid *oidp, void *arg1, int arg2, \
	struct sysctl_req *req)


/*
 * This describes the access space for a sysctl request.  This is needed
 * so that we can use the interface from the kernel or from user-space.
 */
struct sysctl_req {
	struct proc	*p;
	int		lock;
	user_addr_t	oldptr;		/* pointer to user supplied buffer */
	size_t		oldlen;		/* user buffer length (also returned) */
	size_t		oldidx;		/* total data iteratively copied out */
	int		(*oldfunc)(struct sysctl_req *, const void *, size_t);
	user_addr_t	newptr;		/* buffer containing new value */
	size_t		newlen;		/* length of new value */
	size_t		newidx;		/* total data iteratively copied in */
	int		(*newfunc)(struct sysctl_req *, void *, size_t);
};

SLIST_HEAD(sysctl_oid_list, sysctl_oid);

#define SYSCTL_OID_VERSION	1	/* current OID structure version */

/*
 * This describes one "oid" in the MIB tree.  Potentially more nodes can
 * be hidden behind it, expanded by the handler.
 *
 * NOTES:	We implement binary comparibility between CTLFLAG_OID2 and
 *		pre-CTLFLAG_OID2 structure in sysctl_register_oid() and in
 *		sysctl_unregister_oid() using the fact that the fields up
 *		to oid_fmt are unchanged, and that the field immediately
 *		following is on an alignment boundary following a pointer
 *		type and is also a pointer.  This lets us get the previous
 *		size of the structure, and the copy-cut-off point, using
 *		the offsetof() language primitive, and these values  are
 *		used in conjunction with the fact that earlier and future
 *		statically compiled sysctl_oid structures are declared via
 *		macros.  This lets us overload the macros so that the addition
 *		of the CTLFLAG_OID2 in newly compiled code containing sysctl
 *		node declarations, subsequently allowing us to to avoid
 *		changing the KPI used for non-static (un)registration in
 *		KEXTs.
 *
 *		This depends on the fact that people declare SYSCTLs,
 *		rather than declaring sysctl_oid structures.  All new code
 *		should avoid declaring struct sysctl_oid's directly without
 *		the macros; the current risk for this is limited to losing
 *		your description field and ending up with a malloc'ed copy,
 *		as if it were a legacy binary static declaration via SYSCTL;
 *		in the future, we may deprecate access to a named structure
 *		type in third party code.  Use the macros, or our code will
 *		end up with compile errors when that happens.
 *
 *		Please try to include a long description of the field in any
 *		new sysctl declarations (all the macros support this).  This
 *		field may be the only human readable documentation your users
 *		get for your sysctl.
 */
struct sysctl_oid {
	struct sysctl_oid_list *oid_parent;
	SLIST_ENTRY(sysctl_oid) oid_link;
	int		oid_number;
	int		oid_kind;
	void		*oid_arg1;
	int		oid_arg2;
	const char	*oid_name;
	int 		(*oid_handler) SYSCTL_HANDLER_ARGS;
	const char	*oid_fmt;
	const char	*oid_descr; /* offsetof() field / long description */
	int		oid_version;
	int		oid_refcnt;
};

#define SYSCTL_IN(r, p, l) (r->newfunc)(r, p, l)
#define SYSCTL_OUT(r, p, l) (r->oldfunc)(r, p, l)

typedef int (* sysctl_handler_t) SYSCTL_HANDLER_ARGS;

__BEGIN_DECLS

/* old interface */
int sysctl_handle_int SYSCTL_HANDLER_ARGS;
int sysctl_handle_long SYSCTL_HANDLER_ARGS;
int sysctl_handle_quad SYSCTL_HANDLER_ARGS;
int sysctl_handle_int2quad SYSCTL_HANDLER_ARGS;
int sysctl_handle_string SYSCTL_HANDLER_ARGS;
int sysctl_handle_opaque SYSCTL_HANDLER_ARGS;
/* new interface */
int sysctl_io_number(struct sysctl_req *req, long long bigValue, size_t valueSize, void *pValue, int *changed);
int sysctl_io_string(struct sysctl_req *req, char *pValue, size_t valueSize, int trunc, int *changed);
int sysctl_io_opaque(struct sysctl_req *req, void *pValue, size_t valueSize, int *changed);

/*
 * These functions are used to add/remove an oid from the mib.
 */
void sysctl_register_oid(struct sysctl_oid *oidp);
void sysctl_unregister_oid(struct sysctl_oid *oidp);

/* Deprecated */
void sysctl_register_fixed(void) __deprecated;

__END_DECLS

/* Declare an oid to allow child oids to be added to it. */
#define SYSCTL_DECL(name)					\
	extern struct sysctl_oid_list sysctl_##name##_children

#ifdef XNU_KERNEL_PRIVATE
#define SYSCTL_LINKER_SET_ENTRY LINKER_SET_ENTRY
#else
#define SYSCTL_LINKER_SET_ENTRY(a, b)
#endif
/*
 * Macros to define sysctl entries.  Which to use?  Pure data that are 
 * returned without modification, SYSCTL_<data type> is for you, like
 * SYSCTL_QUAD for a 64-bit value.  When you want to run a handler of your
 * own, SYSCTL_PROC. 
 *
 * parent:	parent in name hierarchy (e.g. _kern for "kern")
 * nbr:		ID.  Almost certainly OID_AUTO ("pick one for me") for you.
 * name:	name for this particular item (e.g. "thesysctl" for "kern.thesysctl")
 * kind/access: Control flags (CTLFLAG_*).  Some notable options include:
 * 			CTLFLAG_ANYBODY: 	non-root users allowed
 * 			CTLFLAG_MASKED:	 	don't show in sysctl listing in userland
 * 			CTLFLAG_LOCKED:		does own locking (no additional protection needed)
 * 			CTLFLAG_KERN:		valid inside kernel (best avoided generally)
 * 			CTLFLAG_WR:		"new" value accepted
 * a1, a2:	entry-data, passed to handler (see specific macros)
 * Format String: Tells "sysctl" tool how to print data from this entry.
 *	 		"A" - string
 *	 		"I" - list of integers. "IU" - list of unsigned integers. space-separated.
 *	 		"-" - do not print
 *	 		"L" - longs, as ints with I
 *			"P" - pointer
 * 			"Q" - quads
 * 			"S","T" - clock info, see sysctl.c in system_cmds (you probably don't need this)
 * Description: unused
 */


/* This constructs a "raw" MIB oid. */
#define SYSCTL_STRUCT_INIT(parent, nbr, name, kind, a1, a2, handler, fmt, descr) \
	{												\
		&sysctl_##parent##_children, { 0 },			\
		nbr, (int)(kind|CTLFLAG_OID2), a1, (int)(a2), #name, handler, fmt, descr, SYSCTL_OID_VERSION, 0 \
	}

#define SYSCTL_OID(parent, nbr, name, kind, a1, a2, handler, fmt, descr) \
	struct sysctl_oid sysctl_##parent##_##name = SYSCTL_STRUCT_INIT(parent, nbr, name, kind, a1, a2, handler, fmt, descr); \
	SYSCTL_LINKER_SET_ENTRY(__sysctl_set, sysctl_##parent##_##name)

/* This constructs a node from which other oids can hang. */
#define SYSCTL_NODE(parent, nbr, name, access, handler, descr)		    \
	struct sysctl_oid_list sysctl_##parent##_##name##_children;	    \
	SYSCTL_OID(parent, nbr, name, CTLTYPE_NODE|access,		    \
		   (void*)&sysctl_##parent##_##name##_children, 0, handler, \
		   "N", descr);

/* Oid for a string.  len can be 0 to indicate '\0' termination. */
#define SYSCTL_STRING(parent, nbr, name, access, arg, len, descr) \
	SYSCTL_OID(parent, nbr, name, CTLTYPE_STRING|access, \
		arg, len, sysctl_handle_string, "A", descr)

#define SYSCTL_COMPAT_INT(parent, nbr, name, access, ptr, val, descr) \
	SYSCTL_OID(parent, nbr, name, CTLTYPE_INT|access, \
               ptr, val, sysctl_handle_int, "I", descr)

#define SYSCTL_COMPAT_UINT(parent, nbr, name, access, ptr, val, descr) \
	SYSCTL_OID(parent, nbr, name, CTLTYPE_INT|access, \
		ptr, val, sysctl_handle_int, "IU", descr)

/* Oid for an int.  If ptr is NULL, val is returned. */
#define SYSCTL_INT(parent, nbr, name, access, ptr, val, descr) \
	SYSCTL_OID(parent, nbr, name, CTLTYPE_INT|access, \
               ptr, val, sysctl_handle_int, "I", descr); \
	typedef char _sysctl_##parent##_##name##_size_check[(__builtin_constant_p(ptr) || sizeof(*(ptr)) == sizeof(int)) ? 0 : -1];

/* Oid for an unsigned int.  If ptr is NULL, val is returned. */
#define SYSCTL_UINT(parent, nbr, name, access, ptr, val, descr) \
	SYSCTL_OID(parent, nbr, name, CTLTYPE_INT|access, \
		ptr, val, sysctl_handle_int, "IU", descr); \
	typedef char _sysctl_##parent##_##name##_size_check[(__builtin_constant_p(ptr) || sizeof(*(ptr)) == sizeof(unsigned int)) ? 0 : -1];

/* Oid for a long.  The pointer must be non NULL. */
#define SYSCTL_LONG(parent, nbr, name, access, ptr, descr) \
	SYSCTL_OID(parent, nbr, name, CTLTYPE_INT|access, \
		ptr, 0, sysctl_handle_long, "L", descr); \
	typedef char _sysctl_##parent##_##name##_size_check[(__builtin_constant_p(ptr) || sizeof(*(ptr)) == sizeof(long)) ? 0 : -1];

/* Oid for a unsigned long.  The pointer must be non NULL. */
#define SYSCTL_ULONG(parent, nbr, name, access, ptr, descr) \
	SYSCTL_OID(parent, nbr, name, CTLTYPE_INT|access, \
		ptr, 0, sysctl_handle_long, "LU", descr); \
	typedef char _sysctl_##parent##_##name##_size_check[(__builtin_constant_p(ptr) || sizeof(*(ptr)) == sizeof(unsigned long)) ? 0 : -1];

/* Oid for a quad.  The pointer must be non NULL. */
#define SYSCTL_QUAD(parent, nbr, name, access, ptr, descr) \
	SYSCTL_OID(parent, nbr, name, CTLTYPE_QUAD|access, \
		ptr, 0, sysctl_handle_quad, "Q", descr); \
	typedef char _sysctl_##parent##_##name##_size_check[(__builtin_constant_p(ptr) || sizeof(*(ptr)) == sizeof(long long)) ? 0 : -1];

/* Oid for an opaque object.  Specified by a pointer and a length. */
#define SYSCTL_OPAQUE(parent, nbr, name, access, ptr, len, fmt, descr) \
	SYSCTL_OID(parent, nbr, name, CTLTYPE_OPAQUE|access, \
		ptr, len, sysctl_handle_opaque, fmt, descr)

/* Oid for a struct.  Specified by a pointer and a type. */
#define SYSCTL_STRUCT(parent, nbr, name, access, ptr, type, descr) \
	SYSCTL_OID(parent, nbr, name, CTLTYPE_OPAQUE|access, \
		ptr, sizeof(struct type), sysctl_handle_opaque, \
		"S," #type, descr)

/* 
 * Oid for a procedure.  Specified by a pointer and an arg.
 * CTLTYPE_* macros can determine how the "sysctl" tool deals with
 * input (e.g. converting to int).
 */
#define SYSCTL_PROC(parent, nbr, name, access, ptr, arg, handler, fmt, descr) \
	SYSCTL_OID(parent, nbr, name, access, \
		ptr, arg, handler, fmt, descr)
		
		
extern struct sysctl_oid_list sysctl__children;
SYSCTL_DECL(_kern);
SYSCTL_DECL(_sysctl);
SYSCTL_DECL(_vm);
SYSCTL_DECL(_vfs);
SYSCTL_DECL(_net);
SYSCTL_DECL(_debug);
SYSCTL_DECL(_hw);
SYSCTL_DECL(_machdep);
SYSCTL_DECL(_user);

#ifdef PRIVATE
SYSCTL_DECL(_hw_features);
#endif


#ifndef SYSCTL_SKMEM_UPDATE_FIELD

#define	SYSCTL_SKMEM 0
#define	SYSCTL_SKMEM_UPDATE_FIELD(field, value)
#define	SYSCTL_SKMEM_UPDATE_AT_OFFSET(offset, value)
#define	SYSCTL_SKMEM_INT(parent, oid, sysctl_name, access, ptr, offset, descr) \
	SYSCTL_INT(parent, oid, sysctl_name, access, ptr, 0, descr)

#define	SYSCTL_SKMEM_TCP_INT(oid, sysctl_name, access, variable_type,	\
							 variable_name, initial_value, descr)		\
	variable_type variable_name = initial_value;						\
	SYSCTL_SKMEM_INT(_net_inet_tcp, oid, sysctl_name, access,			\
					 &variable_name, 0, descr)

#else /* SYSCTL_SKMEM_UPDATE_FIELD */
#define	SYSCTL_SKMEM 1
#endif /* SYSCTL_SKMEM_UPDATE_FIELD */



#endif /* KERNEL */

#ifdef XNU_KERNEL_PRIVATE
#define SYSCTL_DEF_ENABLED
#else
#ifndef KERNEL
#define SYSCTL_DEF_ENABLED
#endif
#endif

#ifdef SYSCTL_DEF_ENABLED
/*
 * Top-level identifiers
 */
#define	CTL_UNSPEC	0		/* unused */
#define	CTL_KERN	1		/* "high kernel": proc, limits */
#define	CTL_VM		2		/* virtual memory */
#define	CTL_VFS		3		/* file system, mount type is next */
#define	CTL_NET		4		/* network, see socket.h */
#define	CTL_DEBUG	5		/* debugging parameters */
#define	CTL_HW		6		/* generic cpu/io */
#define	CTL_MACHDEP	7		/* machine dependent */
#define	CTL_USER	8		/* user-level */
#define	CTL_MAXID	9		/* number of valid top-level ids */

#define CTL_NAMES { \
	{ 0, 0 }, \
	{ "kern", CTLTYPE_NODE }, \
	{ "vm", CTLTYPE_NODE }, \
	{ "vfs", CTLTYPE_NODE }, \
	{ "net", CTLTYPE_NODE }, \
	{ "debug", CTLTYPE_NODE }, \
	{ "hw", CTLTYPE_NODE }, \
	{ "machdep", CTLTYPE_NODE }, \
	{ "user", CTLTYPE_NODE }, \
}

/*
 * CTL_KERN identifiers
 */
#define	KERN_OSTYPE	 	 1	/* string: system version */
#define	KERN_OSRELEASE	 	 2	/* string: system release */
#define	KERN_OSREV	 	 3	/* int: system revision */
#define	KERN_VERSION	 	 4	/* string: compile time info */
#define	KERN_MAXVNODES	 	 5	/* int: max vnodes */
#define	KERN_MAXPROC	 	 6	/* int: max processes */
#define	KERN_MAXFILES	 	 7	/* int: max open files */
#define	KERN_ARGMAX	 	 8	/* int: max arguments to exec */
#define	KERN_SECURELVL	 	 9	/* int: system security level */
#define	KERN_HOSTNAME		10	/* string: hostname */
#define	KERN_HOSTID		11	/* int: host identifier */
#define	KERN_CLOCKRATE		12	/* struct: struct clockrate */
#define	KERN_VNODE		13	/* struct: vnode structures */
#define	KERN_PROC		14	/* struct: process entries */
#define	KERN_FILE		15	/* struct: file entries */
#define	KERN_PROF		16	/* node: kernel profiling info */
#define	KERN_POSIX1		17	/* int: POSIX.1 version */
#define	KERN_NGROUPS		18	/* int: # of supplemental group ids */
#define	KERN_JOB_CONTROL	19	/* int: is job control available */
#define	KERN_SAVED_IDS		20	/* int: saved set-user/group-ID */
#define	KERN_BOOTTIME		21	/* struct: time kernel was booted */
#define KERN_NISDOMAINNAME	22	/* string: YP domain name */
#define KERN_DOMAINNAME		KERN_NISDOMAINNAME
#define	KERN_MAXPARTITIONS	23	/* int: number of partitions/disk */
#define	KERN_KDEBUG			24	/* int: kernel trace points */
#define KERN_UPDATEINTERVAL	25	/* int: update process sleep time */
#define KERN_OSRELDATE		26	/* int: OS release date */
#define KERN_NTP_PLL		27	/* node: NTP PLL control */
#define	KERN_BOOTFILE		28	/* string: name of booted kernel */
#define	KERN_MAXFILESPERPROC	29	/* int: max open files per proc */
#define	KERN_MAXPROCPERUID 	30	/* int: max processes per uid */
#define KERN_DUMPDEV		31	/* dev_t: device to dump on */
#define	KERN_IPC		32	/* node: anything related to IPC */
#define	KERN_DUMMY		33	/* unused */
#define	KERN_PS_STRINGS	34	/* int: address of PS_STRINGS */
#define	KERN_USRSTACK32	35	/* int: address of USRSTACK */
#define	KERN_LOGSIGEXIT	36	/* int: do we log sigexit procs? */
#define KERN_SYMFILE		37	/* string: kernel symbol filename */
#define KERN_PROCARGS		38
                             /* 39 was KERN_PCSAMPLES... now deprecated */
#define KERN_NETBOOT		40	/* int: are we netbooted? 1=yes,0=no */
                             /* 41 was KERN_PANICINFO : panic UI information (deprecated) */
#define	KERN_SYSV		42	/* node: System V IPC information */
#define KERN_AFFINITY		43	/* xxx */
#define KERN_TRANSLATE	   	44	/* xxx */
#define KERN_CLASSIC	   	KERN_TRANSLATE	/* XXX backwards compat */
#define KERN_EXEC		45	/* xxx */
#define KERN_CLASSICHANDLER	KERN_EXEC /* XXX backwards compatibility */
#define	KERN_AIOMAX		46	/* int: max aio requests */
#define	KERN_AIOPROCMAX		47	/* int: max aio requests per process */
#define	KERN_AIOTHREADS		48	/* int: max aio worker threads */
#ifdef __APPLE_API_UNSTABLE
#define	KERN_PROCARGS2		49
#endif /* __APPLE_API_UNSTABLE */
#define KERN_COREFILE		50	/* string: corefile format string */
#define KERN_COREDUMP		51	/* int: whether to coredump at all */
#define	KERN_SUGID_COREDUMP	52	/* int: whether to dump SUGID cores */
#define	KERN_PROCDELAYTERM	53	/* int: set/reset current proc for delayed termination during shutdown */
#define KERN_SHREG_PRIVATIZABLE	54	/* int: can shared regions be privatized ? */
                             /* 55 was KERN_PROC_LOW_PRI_IO... now deprecated */
#define	KERN_LOW_PRI_WINDOW	56	/* int: set/reset throttle window - milliseconds */
#define	KERN_LOW_PRI_DELAY	57	/* int: set/reset throttle delay - milliseconds */
#define	KERN_POSIX		58	/* node: posix tunables */
#define	KERN_USRSTACK64		59	/* LP64 user stack query */
#define KERN_NX_PROTECTION	60	/* int: whether no-execute protection is enabled */
#define	KERN_TFP 		61	/* Task for pid settings */
#define	KERN_PROCNAME 		62	/* setup process program  name(2*MAXCOMLEN) */
#define	KERN_THALTSTACK		63	/* for compat with older x86 and does nothing */
#define	KERN_SPECULATIVE_READS	64	/* int: whether speculative reads are disabled */
#define	KERN_OSVERSION		65	/* for build number i.e. 9A127 */
#define	KERN_SAFEBOOT		66	/* are we booted safe? */
			/*	67 was KERN_LCTX (login context) */
#define KERN_RAGEVNODE		68
#define KERN_TTY		69	/* node: tty settings */
#define KERN_CHECKOPENEVT       70      /* spi: check the VOPENEVT flag on vnodes at open time */
#define	KERN_THREADNAME		71	/* set/get thread name */
#define	KERN_MAXID		72	/* number of valid kern ids */
/*
 * Don't add any more sysctls like this.  Instead, use the SYSCTL_*() macros
 * and OID_AUTO. This will have the added benefit of not having to recompile
 * sysctl(8) to pick up your changes.
 */

#if COUNT_SYSCALLS && defined(KERNEL) 
#define	KERN_COUNT_SYSCALLS (KERN_OSTYPE + 1000)	/* keep called count for each bsd syscall */
#endif

#if defined(__LP64__)
#define	KERN_USRSTACK KERN_USRSTACK64
#else
#define	KERN_USRSTACK KERN_USRSTACK32
#endif


/* KERN_RAGEVNODE types */
#define KERN_RAGE_PROC		1
#define KERN_RAGE_THREAD	2
#define KERN_UNRAGE_PROC	3
#define KERN_UNRAGE_THREAD	4

/* KERN_OPENEVT types */
#define KERN_OPENEVT_PROC     1
#define KERN_UNOPENEVT_PROC   2

/* KERN_TFP types */
#define KERN_TFP_POLICY 		1

/* KERN_TFP_POLICY values . All policies allow task port for self */
#define KERN_TFP_POLICY_DENY 		0 	/* Deny Mode: None allowed except privileged */
#define KERN_TFP_POLICY_DEFAULT 	2	/* Default  Mode: related ones allowed and upcall authentication */

/* KERN_KDEBUG types */
#define KERN_KDEFLAGS         1
#define KERN_KDDFLAGS         2
#define KERN_KDENABLE         3
#define KERN_KDSETBUF         4
#define KERN_KDGETBUF         5
#define KERN_KDSETUP          6
#define KERN_KDREMOVE         7
#define KERN_KDSETREG         8
#define KERN_KDGETREG         9
#define KERN_KDREADTR         10
#define KERN_KDPIDTR          11
#define KERN_KDTHRMAP         12
/* Don't use 13 as it is overloaded with KERN_VNODE */
#define KERN_KDPIDEX          14
#define KERN_KDSETRTCDEC      15 /* obsolete */
#define KERN_KDGETENTROPY     16 /* obsolete */
#define KERN_KDWRITETR        17
#define KERN_KDWRITEMAP       18
#define KERN_KDTEST           19
/* 20 unused */
#define KERN_KDREADCURTHRMAP  21
#define KERN_KDSET_TYPEFILTER 22
#define KERN_KDBUFWAIT        23
#define KERN_KDCPUMAP         24
/* 25 - 26 unused */
#define KERN_KDWRITEMAP_V3    27
#define KERN_KDWRITETR_V3     28

#define CTL_KERN_NAMES { \
	{ 0, 0 }, \
	{ "ostype", CTLTYPE_STRING }, \
	{ "osrelease", CTLTYPE_STRING }, \
	{ "osrevision", CTLTYPE_INT }, \
	{ "version", CTLTYPE_STRING }, \
	{ "maxvnodes", CTLTYPE_INT }, \
	{ "maxproc", CTLTYPE_INT }, \
	{ "maxfiles", CTLTYPE_INT }, \
	{ "argmax", CTLTYPE_INT }, \
	{ "securelevel", CTLTYPE_INT }, \
	{ "hostname", CTLTYPE_STRING }, \
	{ "hostid", CTLTYPE_INT }, \
	{ "clockrate", CTLTYPE_STRUCT }, \
	{ "vnode", CTLTYPE_STRUCT }, \
	{ "proc", CTLTYPE_STRUCT }, \
	{ "file", CTLTYPE_STRUCT }, \
	{ "profiling", CTLTYPE_NODE }, \
	{ "posix1version", CTLTYPE_INT }, \
	{ "ngroups", CTLTYPE_INT }, \
	{ "job_control", CTLTYPE_INT }, \
	{ "saved_ids", CTLTYPE_INT }, \
	{ "boottime", CTLTYPE_STRUCT }, \
	{ "nisdomainname", CTLTYPE_STRING }, \
	{ "maxpartitions", CTLTYPE_INT }, \
	{ "kdebug", CTLTYPE_INT }, \
	{ "update", CTLTYPE_INT }, \
	{ "osreldate", CTLTYPE_INT }, \
	{ "ntp_pll", CTLTYPE_NODE }, \
	{ "bootfile", CTLTYPE_STRING }, \
	{ "maxfilesperproc", CTLTYPE_INT }, \
	{ "maxprocperuid", CTLTYPE_INT }, \
	{ "dumpdev", CTLTYPE_STRUCT }, /* we lie; don't print as int */ \
	{ "ipc", CTLTYPE_NODE }, \
	{ "dummy", CTLTYPE_INT }, \
	{ "dummy", CTLTYPE_INT }, \
	{ "usrstack", CTLTYPE_INT }, \
	{ "logsigexit", CTLTYPE_INT }, \
	{ "symfile",CTLTYPE_STRING },\
	{ "procargs",CTLTYPE_STRUCT },\
        { "dummy", CTLTYPE_INT },		/* deprecated pcsamples */ \
	{ "netboot", CTLTYPE_INT }, \
	{ "dummy", CTLTYPE_INT }, 		/* deprecated: panicinfo */ \
	{ "sysv", CTLTYPE_NODE }, \
	{ "dummy", CTLTYPE_INT }, \
	{ "dummy", CTLTYPE_INT }, \
	{ "exec", CTLTYPE_NODE }, \
	{ "aiomax", CTLTYPE_INT }, \
	{ "aioprocmax", CTLTYPE_INT }, \
	{ "aiothreads", CTLTYPE_INT }, \
	{ "procargs2",CTLTYPE_STRUCT }, \
	{ "corefile",CTLTYPE_STRING }, \
	{ "coredump", CTLTYPE_INT }, \
	{ "sugid_coredump", CTLTYPE_INT }, \
	{ "delayterm", CTLTYPE_INT }, \
	{ "shreg_private", CTLTYPE_INT }, \
	{ "proc_low_pri_io", CTLTYPE_INT }, \
	{ "low_pri_window", CTLTYPE_INT }, \
	{ "low_pri_delay", CTLTYPE_INT }, \
	{ "posix", CTLTYPE_NODE }, \
	{ "usrstack64", CTLTYPE_QUAD }, \
	{ "nx", CTLTYPE_INT }, \
	{ "tfp", CTLTYPE_NODE }, \
	{ "procname", CTLTYPE_STRING }, \
	{ "threadsigaltstack", CTLTYPE_INT }, \
	{ "speculative_reads_disabled", CTLTYPE_INT }, \
	{ "osversion", CTLTYPE_STRING }, \
	{ "safeboot", CTLTYPE_INT }, \
	{ "dummy", CTLTYPE_INT }, 		/* deprecated: lctx */ \
	{ "rage_vnode", CTLTYPE_INT }, \
	{ "tty", CTLTYPE_NODE },	\
	{ "check_openevt", CTLTYPE_INT }, \
	{ "thread_name", CTLTYPE_STRING } \
}

/*
 * CTL_VFS identifiers
 */
#define CTL_VFS_NAMES { \
	{ "vfsconf", CTLTYPE_STRUCT } \
}

/* 
 * KERN_PROC subtypes
 */
#define KERN_PROC_ALL		0	/* everything */
#define	KERN_PROC_PID		1	/* by process id */
#define	KERN_PROC_PGRP		2	/* by process group id */
#define	KERN_PROC_SESSION	3	/* by session of pid */
#define	KERN_PROC_TTY		4	/* by controlling tty */
#define	KERN_PROC_UID		5	/* by effective uid */
#define	KERN_PROC_RUID		6	/* by real uid */
#define	KERN_PROC_LCID		7	/* by login context id */

#if defined(XNU_KERNEL_PRIVATE) || !defined(KERNEL) 
/* 
 * KERN_PROC subtype ops return arrays of augmented proc structures:
 */

struct _pcred {
	char	pc_lock[72];		/* opaque content */
	struct	ucred *pc_ucred;	/* Current credentials. */
	uid_t	p_ruid;			/* Real user id. */
	uid_t	p_svuid;		/* Saved effective user id. */
	gid_t	p_rgid;			/* Real group id. */
	gid_t	p_svgid;		/* Saved effective group id. */
	int	p_refcnt;		/* Number of references. */
};

struct _ucred {
	int32_t	cr_ref;			/* reference count */
	uid_t	cr_uid;			/* effective user id */
	short	cr_ngroups;		/* number of groups */
	gid_t	cr_groups[NGROUPS];	/* groups */
};

struct kinfo_proc {
	struct	extern_proc kp_proc;			/* proc structure */
	struct	eproc {
		struct	proc *e_paddr;		/* address of proc */
		struct	session *e_sess;	/* session pointer */
		struct	_pcred e_pcred;		/* process credentials */
		struct	_ucred e_ucred;		/* current credentials */
		struct	 vmspace e_vm;		/* address space */
		pid_t	e_ppid;			/* parent process id */
		pid_t	e_pgid;			/* process group id */
		short	e_jobc;			/* job control counter */
		dev_t	e_tdev;			/* controlling tty dev */
		pid_t	e_tpgid;		/* tty process group id */
		struct	session *e_tsess;	/* tty session pointer */
#define	WMESGLEN	7
		char	e_wmesg[WMESGLEN+1];	/* wchan message */
		segsz_t e_xsize;		/* text size */
		short	e_xrssize;		/* text rss */
		short	e_xccount;		/* text references */
		short	e_xswrss;
		int32_t	e_flag;
#define	EPROC_CTTY	0x01	/* controlling tty vnode active */
#define	EPROC_SLEADER	0x02	/* session leader */
#define	COMAPT_MAXLOGNAME	12
		char	e_login[COMAPT_MAXLOGNAME];	/* short setlogin() name */
		int32_t	e_spare[4];
	} kp_eproc;
};

#endif /* defined(XNU_KERNEL_PRIVATE) || !defined(KERNEL) */

#ifdef BSD_KERNEL_PRIVATE
#include <sys/proc_internal.h>

/* LP64 version of _pcred.  all pointers 
 * grow when we're dealing with a 64-bit process.
 * WARNING - keep in sync with _pcred
 */

struct user32_pcred {
	char	pc_lock[72];		/* opaque content */
	user32_addr_t	pc_ucred;	/* Current credentials. */
	uid_t	p_ruid;			/* Real user id. */
	uid_t	p_svuid;		/* Saved effective user id. */
	gid_t	p_rgid;			/* Real group id. */
	gid_t	p_svgid;		/* Saved effective group id. */
	int	p_refcnt;		/* Number of references. */
};
struct user64_pcred {
	char	pc_lock[72];		/* opaque content */
	user64_addr_t	pc_ucred;	/* Current credentials. */
	uid_t	p_ruid;			/* Real user id. */
	uid_t	p_svuid;		/* Saved effective user id. */
	gid_t	p_rgid;			/* Real group id. */
	gid_t	p_svgid;		/* Saved effective group id. */
	int	p_refcnt;		/* Number of references. */
};

/* LP64 version of kinfo_proc.  all pointers 
 * grow when we're dealing with a 64-bit process.
 * WARNING - keep in sync with kinfo_proc
 */
struct user32_kinfo_proc {
	struct	user32_extern_proc kp_proc;	/* proc structure */
	struct	user32_eproc {
		user32_addr_t e_paddr;		/* address of proc */
		user32_addr_t e_sess;			/* session pointer */
		struct	user32_pcred e_pcred;		/* process credentials */
		struct	_ucred e_ucred;		/* current credentials */
		struct	user32_vmspace e_vm; /* address space */
		pid_t	e_ppid;			/* parent process id */
		pid_t	e_pgid;			/* process group id */
		short	e_jobc;			/* job control counter */
		dev_t	e_tdev;			/* controlling tty dev */
		pid_t	e_tpgid;		/* tty process group id */
		user32_addr_t	e_tsess;	/* tty session pointer */
		char	e_wmesg[WMESGLEN+1];	/* wchan message */
		segsz_t e_xsize;		/* text size */
		short	e_xrssize;		/* text rss */
		short	e_xccount;		/* text references */
		short	e_xswrss;
		int32_t	e_flag;
		char	e_login[COMAPT_MAXLOGNAME];	/* short setlogin() name */
		int32_t	e_spare[4];
	} kp_eproc;
};
struct user64_kinfo_proc {
	struct	user64_extern_proc kp_proc;	/* proc structure */
	struct	user64_eproc {
		user_addr_t e_paddr;		/* address of proc */
		user_addr_t e_sess;			/* session pointer */
		struct	user64_pcred e_pcred;		/* process credentials */
		struct	_ucred e_ucred;		/* current credentials */
		struct	 user_vmspace e_vm; /* address space */
		pid_t	e_ppid;			/* parent process id */
		pid_t	e_pgid;			/* process group id */
		short	e_jobc;			/* job control counter */
		dev_t	e_tdev;			/* controlling tty dev */
		pid_t	e_tpgid;		/* tty process group id */
		user64_addr_t	e_tsess __attribute((aligned(8)));	/* tty session pointer */
		char	e_wmesg[WMESGLEN+1];	/* wchan message */
		segsz_t e_xsize;		/* text size */
		short	e_xrssize;		/* text rss */
		short	e_xccount;		/* text references */
		short	e_xswrss;
		int32_t	e_flag;
		char	e_login[COMAPT_MAXLOGNAME];	/* short setlogin() name */
		int32_t	e_spare[4];
	} kp_eproc;
};

#endif	/* BSD_KERNEL_PRIVATE */

/*
 * KERN_IPC identifiers
 */
#define KIPC_MAXSOCKBUF		1	/* int: max size of a socket buffer */
#define	KIPC_SOCKBUF_WASTE	2	/* int: wastage factor in sockbuf */
#define	KIPC_SOMAXCONN		3	/* int: max length of connection q */
#define	KIPC_MAX_LINKHDR	4	/* int: max length of link header */
#define	KIPC_MAX_PROTOHDR	5	/* int: max length of network header */
#define	KIPC_MAX_HDR		6	/* int: max total length of headers */
#define	KIPC_MAX_DATALEN	7	/* int: max length of data? */
#define	KIPC_MBSTAT		8	/* struct: mbuf usage statistics */
#define	KIPC_NMBCLUSTERS	9	/* int: maximum mbuf clusters */
#define KIPC_SOQLIMITCOMPAT	10	/* int: socket queue limit */

/*
 * CTL_VM identifiers
 */
#define	VM_METER	1		/* struct vmmeter */
#define	VM_LOADAVG	2		/* struct loadavg */
/*
 * Note: "3" was skipped sometime ago and should probably remain unused
 * to avoid any new entry from being accepted by older kernels...
 */ 
#define	VM_MACHFACTOR	4		/* struct loadavg with mach factor*/
#define VM_SWAPUSAGE	5		/* total swap usage */
#define	VM_MAXID	6		/* number of valid vm ids */

#define	CTL_VM_NAMES { \
	{ 0, 0 }, \
	{ "vmmeter", CTLTYPE_STRUCT }, \
	{ "loadavg", CTLTYPE_STRUCT }, \
	{ 0, 0 }, /* placeholder for "3" (see comment above) */ \
	{ "dummy", CTLTYPE_INT }, \
	{ "swapusage", CTLTYPE_STRUCT } \
}

struct xsw_usage {
	u_int64_t	xsu_total;
	u_int64_t	xsu_avail;
	u_int64_t	xsu_used;
	u_int32_t	xsu_pagesize;
	boolean_t	xsu_encrypted;
};

#ifdef __APPLE_API_PRIVATE
/* Load average structure.  Use of fixpt_t assume <sys/types.h> in scope. */
/* XXX perhaps we should protect fixpt_t, and define it here (or discard it) */
struct loadavg {
	fixpt_t	ldavg[3];
	long	fscale;
};
extern struct loadavg averunnable;
#define LSCALE	1000		/* scaling for "fixed point" arithmetic */

#ifdef BSD_KERNEL_PRIVATE

struct user32_loadavg {
	fixpt_t	ldavg[3];
    user32_long_t	fscale;
};

struct user64_loadavg {
	fixpt_t	ldavg[3];
    user64_long_t	fscale;
};

#endif	/* BSD_KERNEL_PRIVATE */
#endif /* __APPLE_API_PRIVATE */


/*
 * CTL_HW identifiers
 */
#define	HW_MACHINE	 1		/* string: machine class */
#define	HW_MODEL	 2		/* string: specific machine model */
#define	HW_NCPU		 3		/* int: number of cpus */
#define	HW_BYTEORDER	 4		/* int: machine byte order */
#define	HW_PHYSMEM	 5		/* int: total memory */
#define	HW_USERMEM	 6		/* int: non-kernel memory */
#define	HW_PAGESIZE	 7		/* int: software page size */
#define	HW_DISKNAMES	 8		/* strings: disk drive names */
#define	HW_DISKSTATS	 9		/* struct: diskstats[] */
#define	HW_EPOCH  	10		/* int: 0 for Legacy, else NewWorld */
#define HW_FLOATINGPT	11		/* int: has HW floating point? */
#define HW_MACHINE_ARCH	12		/* string: machine architecture */
#define HW_VECTORUNIT	13		/* int: has HW vector unit? */
#define HW_BUS_FREQ	14		/* int: Bus Frequency */
#define HW_CPU_FREQ	15		/* int: CPU Frequency */
#define HW_CACHELINE	16		/* int: Cache Line Size in Bytes */
#define HW_L1ICACHESIZE	17		/* int: L1 I Cache Size in Bytes */
#define HW_L1DCACHESIZE	18		/* int: L1 D Cache Size in Bytes */
#define HW_L2SETTINGS	19		/* int: L2 Cache Settings */
#define HW_L2CACHESIZE	20		/* int: L2 Cache Size in Bytes */
#define HW_L3SETTINGS	21		/* int: L3 Cache Settings */
#define HW_L3CACHESIZE	22		/* int: L3 Cache Size in Bytes */
#define HW_TB_FREQ	23		/* int: Bus Frequency */
#define HW_MEMSIZE	24		/* uint64_t: physical ram size */
#define HW_AVAILCPU	25		/* int: number of available CPUs */
#define	HW_MAXID	26		/* number of valid hw ids */

#define CTL_HW_NAMES { \
	{ 0, 0 }, \
	{ "machine", CTLTYPE_STRING }, \
	{ "model", CTLTYPE_STRING }, \
	{ "ncpu", CTLTYPE_INT }, \
	{ "byteorder", CTLTYPE_INT }, \
	{ "physmem", CTLTYPE_INT }, \
	{ "usermem", CTLTYPE_INT }, \
	{ "pagesize", CTLTYPE_INT }, \
	{ "disknames", CTLTYPE_STRUCT }, \
	{ "diskstats", CTLTYPE_STRUCT }, \
	{ "epoch", CTLTYPE_INT }, \
	{ "floatingpoint", CTLTYPE_INT }, \
	{ "machinearch", CTLTYPE_STRING }, \
	{ "vectorunit", CTLTYPE_INT }, \
	{ "busfrequency", CTLTYPE_INT }, \
	{ "cpufrequency", CTLTYPE_INT }, \
	{ "cachelinesize", CTLTYPE_INT }, \
	{ "l1icachesize", CTLTYPE_INT }, \
	{ "l1dcachesize", CTLTYPE_INT }, \
	{ "l2settings", CTLTYPE_INT }, \
	{ "l2cachesize", CTLTYPE_INT }, \
	{ "l3settings", CTLTYPE_INT }, \
	{ "l3cachesize", CTLTYPE_INT }, \
	{ "tbfrequency", CTLTYPE_INT }, \
	{ "memsize", CTLTYPE_QUAD }, \
	{ "availcpu", CTLTYPE_INT } \
}

/*
 * XXX This information should be moved to the man page.
 *
 * These are the support HW selectors for sysctlbyname.  Parameters that are byte counts or frequencies are 64 bit numbers.
 * All other parameters are 32 bit numbers.
 *
 *   hw.memsize                - The number of bytes of physical memory in the system.
 *
 *   hw.ncpu                   - The maximum number of processors that could be available this boot.
 *                               Use this value for sizing of static per processor arrays; i.e. processor load statistics.
 *
 *   hw.activecpu              - The number of processors currently available for executing threads.
 *                               Use this number to determine the number threads to create in SMP aware applications.
 *                               This number can change when power management modes are changed.
 *
 *   hw.physicalcpu            - The number of physical processors available in the current power management mode.
 *   hw.physicalcpu_max        - The maximum number of physical processors that could be available this boot
 *
 *   hw.logicalcpu             - The number of logical processors available in the current power management mode.
 *   hw.logicalcpu_max         - The maximum number of logical processors that could be available this boot
 *
 *   hw.tbfrequency            - This gives the time base frequency used by the OS and is the basis of all timing services.
 *                               In general is is better to use mach's or higher level timing services, but this value
 *                               is needed to convert the PPC Time Base registers to real time.
 *
 *   hw.cpufrequency           - These values provide the current, min and max cpu frequency.  The min and max are for
 *   hw.cpufrequency_max       - all power management modes.  The current frequency is the max frequency in the current mode.
 *   hw.cpufrequency_min       - All frequencies are in Hz.
 *
 *   hw.busfrequency           - These values provide the current, min and max bus frequency.  The min and max are for
 *   hw.busfrequency_max       - all power management modes.  The current frequency is the max frequency in the current mode.
 *   hw.busfrequency_min       - All frequencies are in Hz.
 *
 *   hw.cputype                - These values provide the mach-o cpu type and subtype.  A complete list is in <mach/machine.h>
 *   hw.cpusubtype             - These values should be used to determine what processor family the running cpu is from so that
 *                               the best binary can be chosen, or the best dynamic code generated.  They should not be used
 *                               to determine if a given processor feature is available.
 *   hw.cputhreadtype          - This value will be present if the processor supports threads.  Like hw.cpusubtype this selector
 *                               should not be used to infer features, and only used to name the processors thread architecture.
 *                               The values are defined in <mach/machine.h>
 *
 *   hw.byteorder              - Gives the byte order of the processor.  4321 for big endian, 1234 for little.
 *
 *   hw.pagesize               - Gives the size in bytes of the pages used by the processor and VM system.
 *
 *   hw.cachelinesize          - Gives the size in bytes of the processor's cache lines.
 *                               This value should be use to control the strides of loops that use cache control instructions
 *                               like dcbz, dcbt or dcbst.
 *
 *   hw.l1dcachesize           - These values provide the size in bytes of the L1, L2 and L3 caches.  If a cache is not present
 *   hw.l1icachesize           - then the selector will return and error.
 *   hw.l2cachesize            -
 *   hw.l3cachesize            -
 *
 *   hw.packages               - Gives the number of processor packages.
 *
 * These are the selectors for optional processor features for specific processors.  Selectors that return errors are not support 
 * on the system.  Supported features will return 1 if they are recommended or 0 if they are supported but are not expected to help .
 * performance.  Future versions of these selectors may return larger values as necessary so it is best to test for non zero.
 *
 * For PowerPC:
 *
 *   hw.optional.floatingpoint - Floating Point Instructions
 *   hw.optional.altivec       - AltiVec Instructions
 *   hw.optional.graphicsops   - Graphics Operations
 *   hw.optional.64bitops      - 64-bit Instructions
 *   hw.optional.fsqrt         - HW Floating Point Square Root Instruction
 *   hw.optional.stfiwx        - Store Floating Point as Integer Word Indexed Instructions
 *   hw.optional.dcba          - Data Cache Block Allocate Instruction
 *   hw.optional.datastreams   - Data Streams Instructions
 *   hw.optional.dcbtstreams   - Data Cache Block Touch Steams Instruction Form
 *
 * For x86 Architecture:
 * 
 *   hw.optional.floatingpoint     - Floating Point Instructions
 *   hw.optional.mmx               - Original MMX vector instructions
 *   hw.optional.sse               - Streaming SIMD Extensions
 *   hw.optional.sse2              - Streaming SIMD Extensions 2
 *   hw.optional.sse3              - Streaming SIMD Extensions 3
 *   hw.optional.supplementalsse3  - Supplemental Streaming SIMD Extensions 3
 *   hw.optional.x86_64            - 64-bit support
 */


/*
 * CTL_USER definitions
 */
#define	USER_CS_PATH		 1	/* string: _CS_PATH */
#define	USER_BC_BASE_MAX	 2	/* int: BC_BASE_MAX */
#define	USER_BC_DIM_MAX		 3	/* int: BC_DIM_MAX */
#define	USER_BC_SCALE_MAX	 4	/* int: BC_SCALE_MAX */
#define	USER_BC_STRING_MAX	 5	/* int: BC_STRING_MAX */
#define	USER_COLL_WEIGHTS_MAX	 6	/* int: COLL_WEIGHTS_MAX */
#define	USER_EXPR_NEST_MAX	 7	/* int: EXPR_NEST_MAX */
#define	USER_LINE_MAX		 8	/* int: LINE_MAX */
#define	USER_RE_DUP_MAX		 9	/* int: RE_DUP_MAX */
#define	USER_POSIX2_VERSION	10	/* int: POSIX2_VERSION */
#define	USER_POSIX2_C_BIND	11	/* int: POSIX2_C_BIND */
#define	USER_POSIX2_C_DEV	12	/* int: POSIX2_C_DEV */
#define	USER_POSIX2_CHAR_TERM	13	/* int: POSIX2_CHAR_TERM */
#define	USER_POSIX2_FORT_DEV	14	/* int: POSIX2_FORT_DEV */
#define	USER_POSIX2_FORT_RUN	15	/* int: POSIX2_FORT_RUN */
#define	USER_POSIX2_LOCALEDEF	16	/* int: POSIX2_LOCALEDEF */
#define	USER_POSIX2_SW_DEV	17	/* int: POSIX2_SW_DEV */
#define	USER_POSIX2_UPE		18	/* int: POSIX2_UPE */
#define	USER_STREAM_MAX		19	/* int: POSIX2_STREAM_MAX */
#define	USER_TZNAME_MAX		20	/* int: POSIX2_TZNAME_MAX */
#define	USER_MAXID		21	/* number of valid user ids */

#define	CTL_USER_NAMES { \
	{ 0, 0 }, \
	{ "cs_path", CTLTYPE_STRING }, \
	{ "bc_base_max", CTLTYPE_INT }, \
	{ "bc_dim_max", CTLTYPE_INT }, \
	{ "bc_scale_max", CTLTYPE_INT }, \
	{ "bc_string_max", CTLTYPE_INT }, \
	{ "coll_weights_max", CTLTYPE_INT }, \
	{ "expr_nest_max", CTLTYPE_INT }, \
	{ "line_max", CTLTYPE_INT }, \
	{ "re_dup_max", CTLTYPE_INT }, \
	{ "posix2_version", CTLTYPE_INT }, \
	{ "posix2_c_bind", CTLTYPE_INT }, \
	{ "posix2_c_dev", CTLTYPE_INT }, \
	{ "posix2_char_term", CTLTYPE_INT }, \
	{ "posix2_fort_dev", CTLTYPE_INT }, \
	{ "posix2_fort_run", CTLTYPE_INT }, \
	{ "posix2_localedef", CTLTYPE_INT }, \
	{ "posix2_sw_dev", CTLTYPE_INT }, \
	{ "posix2_upe", CTLTYPE_INT }, \
	{ "stream_max", CTLTYPE_INT }, \
	{ "tzname_max", CTLTYPE_INT } \
}



/*
 * CTL_DEBUG definitions
 *
 * Second level identifier specifies which debug variable.
 * Third level identifier specifies which stucture component.
 */
#define	CTL_DEBUG_NAME		0	/* string: variable name */
#define	CTL_DEBUG_VALUE		1	/* int: variable value */
#define	CTL_DEBUG_MAXID		20


#if (CTL_MAXID != 9) || (KERN_MAXID != 72) || (VM_MAXID != 6) || (HW_MAXID != 26) || (USER_MAXID != 21) || (CTL_DEBUG_MAXID != 20)
#error Use the SYSCTL_*() macros and OID_AUTO instead!
#endif


#ifdef	KERNEL

#ifdef BSD_KERNEL_PRIVATE
extern char	machine[];
extern char	osrelease[];
extern char	ostype[];
extern char	osversion[];

struct linker_set;

void	sysctl_register_set(const char *set);
void	sysctl_unregister_set(const char *set);
void	sysctl_mib_init(void);

int sysctl_int(user_addr_t, size_t *, user_addr_t, size_t, int *);
int sysctl_quad(user_addr_t, size_t *, user_addr_t, size_t, quad_t *);

void sysctl_early_init(void);

#endif /* BSD_KERNEL_PRIVATE */
#else	/* !KERNEL */

__BEGIN_DECLS
int	sysctl(int *, u_int, void *, size_t *, void *, size_t);
int	sysctlbyname(const char *, void *, size_t *, void *, size_t);
int	sysctlnametomib(const char *, int *, size_t *);
__END_DECLS

#endif	/* KERNEL */


#endif /* SYSCTL_DEF_ENABLED */


#endif	/* !_SYS_SYSCTL_H_ */