sysctl.h

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//==========================================================================////      include/sys/sysctl.h////==========================================================================//####BSDCOPYRIGHTBEGIN####//// -------------------------------------------//// Portions of this software may have been derived from OpenBSD, // FreeBSD or other sources, and are covered by the appropriate// copyright disclaimers included herein.//// Portions created by Red Hat are// Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.//// -------------------------------------------////####BSDCOPYRIGHTEND####//==========================================================================/* * 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 * $FreeBSD: src/sys/sys/sysctl.h,v 1.81.2.7 2001/07/18 15:36:56 pirzyk Exp $ */#ifndef _SYS_SYSCTL_H_#define	_SYS_SYSCTL_H_#include <sys/queue.h>#include <cyg/hal/hal_tables.h>/* * 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. */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	CTLTYPE_UINT	6	/* name describes an unsigned integer */#define	CTLTYPE_LONG	7	/* name describes a long */#define	CTLTYPE_ULONG	8	/* name describes an unsigned long */#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_PRISON	0x04000000	/* Prisoned roots can fiddle */#define CTLFLAG_DYN	0x02000000	/* Dynamic oid - can be freed *//* * 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, ""); */ #define OID_AUTO	(-1)#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;	void		*oldptr;	size_t		oldlen;	size_t		oldidx;	int		(*oldfunc)(struct sysctl_req *, const void *, size_t);	void		*newptr;	size_t		newlen;	size_t		newidx;	int		(*newfunc)(struct sysctl_req *, void *, size_t);};SLIST_HEAD(sysctl_oid_list, sysctl_oid);/* * This describes one "oid" in the MIB tree.  Potentially more nodes can * be hidden behind it, expanded by the handler. */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;	int		oid_refcnt;} CYG_HAL_TABLE_TYPE;#define SYSCTL_IN(r, p, l) (r->newfunc)(r, p, l)#define SYSCTL_OUT(r, p, l) (r->oldfunc)(r, p, l)int sysctl_handle_int(SYSCTL_HANDLER_ARGS);int sysctl_handle_long(SYSCTL_HANDLER_ARGS);int sysctl_handle_intptr(SYSCTL_HANDLER_ARGS);int sysctl_handle_string(SYSCTL_HANDLER_ARGS);int sysctl_handle_opaque(SYSCTL_HANDLER_ARGS);/* * 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);/* Declare a static oid to allow child oids to be added to it. */#define SYSCTL_DECL(name)					\	extern struct sysctl_oid_list sysctl_##name##_children/* Hide these in macros */#define	SYSCTL_CHILDREN(oid_ptr) (struct sysctl_oid_list *) \	(oid_ptr)->oid_arg1#define	SYSCTL_STATIC_CHILDREN(oid_name) \	(&sysctl_##oid_name##_children)/* === Structs and macros related to context handling === *//* All dynamically created sysctls can be tracked in a context list. */struct sysctl_ctx_entry {	struct sysctl_oid *entry;	TAILQ_ENTRY(sysctl_ctx_entry) link;};TAILQ_HEAD(sysctl_ctx_list, sysctl_ctx_entry);#ifdef CYGPKG_NET_FREEBSD_SYSCTL/* This constructs a "raw" MIB oid. */#define SYSCTL_OID(parent, nbr, name, kind, a1, a2, handler, fmt, descr) \	struct sysctl_oid sysctl__##parent##_##name \           CYG_HAL_TABLE_ENTRY(sysctl_set) = {		 \		&sysctl_##parent##_children, { 0 },			 \		nbr, kind, a1, a2, #name, handler, fmt };	#else#define SYSCTL_OID(parent, nbr, name, kind, a1, a2, handler, fmt, descr) #endif#define SYSCTL_ADD_OID(ctx, parent, nbr, name, kind, a1, a2, handler, fmt, descr) \	sysctl_add_oid(ctx, parent, nbr, name, kind, a1, a2, handler, fmt, descr);/* 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);#define SYSCTL_ADD_NODE(ctx, parent, nbr, name, access, handler, descr)	    \	sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_NODE|access,	    \	0, 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_ADD_STRING(ctx, parent, nbr, name, access, arg, len, descr)  \	sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_STRING|access,	    \	arg, len, sysctl_handle_string, "A", 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)#define SYSCTL_ADD_INT(ctx, parent, nbr, name, access, ptr, val, descr)	    \	sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_INT|access,	    \	ptr, val, sysctl_handle_int, "I", descr);/* 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_UINT|access, \		ptr, val, sysctl_handle_int, "IU", descr)#define SYSCTL_ADD_UINT(ctx, parent, nbr, name, access, ptr, val, descr)    \	sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_UINT|access,	    \	ptr, val, sysctl_handle_int, "IU", descr);/* Oid for a long.  The pointer must be non NULL. */#define SYSCTL_LONG(parent, nbr, name, access, ptr, val, descr) \	SYSCTL_OID(parent, nbr, name, CTLTYPE_LONG|access, \		ptr, val, sysctl_handle_long, "L", descr)#define SYSCTL_ADD_LONG(ctx, parent, nbr, name, access, ptr, descr)	    \	sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_LONG|access,	    \	ptr, 0, sysctl_handle_long, "L", descr);/* Oid for a long.  The pointer must be non NULL. */#define SYSCTL_ULONG(parent, nbr, name, access, ptr, val, descr) \	SYSCTL_OID(parent, nbr, name, CTLTYPE_ULONG|access, \		ptr, val, sysctl_handle_long, "LU", descr)#define SYSCTL_ADD_ULONG(ctx, parent, nbr, name, access, ptr, descr)	    \	sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_ULONG|access,	    \	ptr, 0, sysctl_handle_long, "LU", descr);/* 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)#define SYSCTL_ADD_OPAQUE(ctx, parent, nbr, name, access, ptr, len, fmt, descr)\	sysctl_add_oid(ctx, 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)#define SYSCTL_ADD_STRUCT(ctx, parent, nbr, name, access, ptr, type, descr) \	sysctl_add_oid(ctx, 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. */#define SYSCTL_PROC(parent, nbr, name, access, ptr, arg, handler, fmt, descr) \	SYSCTL_OID(parent, nbr, name, access, \		ptr, arg, handler, fmt, descr)#define SYSCTL_ADD_PROC(ctx, parent, nbr, name, access, ptr, arg, handler, fmt, descr) \	sysctl_add_oid(ctx, parent, nbr, name, access,			    \	ptr, arg, handler, fmt, descr);#endif /* _KERNEL *//* * 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_P1003_1B	9		/* POSIX 1003.1B */#define	CTL_MAXID	10		/* 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 }, \
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