config root man

/*-
 * Copyright (c) 1998
 *	HD Associates, Inc.  All rights reserved.
 *
 * 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 HD Associates, Inc
 * 4. Neither the name of the author nor the names of any co-contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY HD ASSOCIATES 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 HD ASSOCIATES 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.
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/kern/posix4_mib.c 224159 2011-07-17 23:05:24Z rwatson $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/queue.h>
#include <sys/sysctl.h>
#include <sys/vnode.h>
#include <sys/proc.h>
#include <sys/posix4.h>

static int facility[CTL_P1003_1B_MAXID - 1];
static int facility_initialized[CTL_P1003_1B_MAXID - 1];

static int p31b_sysctl_proc(SYSCTL_HANDLER_ARGS);

/* OID_AUTO isn't working with sysconf(3).  I guess I'd have to
 * modify it to do a lookup by name from the index.
 * For now I've left it a top-level sysctl.
 */

#if 1

SYSCTL_DECL(_p1003_1b);

#define P1B_SYSCTL(num, name)  \
	SYSCTL_INT(_p1003_1b, num, name, CTLFLAG_RD | CTLFLAG_CAPRD, \
	facility + num - 1, 0, "");
#define P1B_SYSCTL_RW(num, name)  \
	SYSCTL_PROC(_p1003_1b, num, name, CTLTYPE_INT | CTLFLAG_RW, NULL, num, \
	    p31b_sysctl_proc, "I", "");

#else

SYSCTL_DECL(_kern_p1003_1b);

#define P1B_SYSCTL(num, name)  \
	SYSCTL_INT(_kern_p1003_1b, OID_AUTO, name, CTLFLAG_RD | CTLFLAG_CAPRD, \
	    facility + num - 1, 0, "");
#define P1B_SYSCTL_RW(num, name)  \
	SYSCTL_PROC(_p1003_1b, OID_AUTO, name, CTLTYPE_INT | CTLFLAG_RW, NULL, \
	    num, p31b_sysctl_proc, "I", "");
SYSCTL_NODE(_kern, OID_AUTO, p1003_1b, CTLFLAG_RW, 0, "P1003.1B");

#endif

SYSCTL_INT(_p1003_1b, CTL_P1003_1B_ASYNCHRONOUS_IO, \
	asynchronous_io, CTLFLAG_RD, &async_io_version, 0, "");
P1B_SYSCTL(CTL_P1003_1B_MAPPED_FILES, mapped_files);
P1B_SYSCTL(CTL_P1003_1B_MEMLOCK, memlock);
P1B_SYSCTL(CTL_P1003_1B_MEMLOCK_RANGE, memlock_range);
P1B_SYSCTL(CTL_P1003_1B_MEMORY_PROTECTION, memory_protection);
P1B_SYSCTL(CTL_P1003_1B_MESSAGE_PASSING, message_passing);
P1B_SYSCTL(CTL_P1003_1B_PRIORITIZED_IO, prioritized_io);
P1B_SYSCTL(CTL_P1003_1B_PRIORITY_SCHEDULING, priority_scheduling);
P1B_SYSCTL(CTL_P1003_1B_REALTIME_SIGNALS, realtime_signals);
P1B_SYSCTL(CTL_P1003_1B_SEMAPHORES, semaphores);
P1B_SYSCTL(CTL_P1003_1B_FSYNC, fsync);
P1B_SYSCTL(CTL_P1003_1B_SHARED_MEMORY_OBJECTS, shared_memory_objects);
P1B_SYSCTL(CTL_P1003_1B_SYNCHRONIZED_IO, synchronized_io);
P1B_SYSCTL(CTL_P1003_1B_TIMERS, timers);
P1B_SYSCTL(CTL_P1003_1B_AIO_LISTIO_MAX, aio_listio_max);
P1B_SYSCTL(CTL_P1003_1B_AIO_MAX, aio_max);
P1B_SYSCTL(CTL_P1003_1B_AIO_PRIO_DELTA_MAX, aio_prio_delta_max);
P1B_SYSCTL(CTL_P1003_1B_DELAYTIMER_MAX, delaytimer_max);
P1B_SYSCTL(CTL_P1003_1B_MQ_OPEN_MAX, mq_open_max);
P1B_SYSCTL(CTL_P1003_1B_PAGESIZE, pagesize);
P1B_SYSCTL(CTL_P1003_1B_RTSIG_MAX, rtsig_max);
P1B_SYSCTL_RW(CTL_P1003_1B_SEM_NSEMS_MAX, sem_nsems_max);
P1B_SYSCTL(CTL_P1003_1B_SEM_VALUE_MAX, sem_value_max);
P1B_SYSCTL(CTL_P1003_1B_SIGQUEUE_MAX, sigqueue_max);
P1B_SYSCTL(CTL_P1003_1B_TIMER_MAX, timer_max);

#define P31B_VALID(num)	((num) >= 1 && (num) < CTL_P1003_1B_MAXID)

static int
p31b_sysctl_proc(SYSCTL_HANDLER_ARGS)
{
	int error, num, val;

	num = arg2;
	if (!P31B_VALID(num))
		return (EINVAL);
	val = facility_initialized[num] ? facility[num - 1] : 0;
	error = sysctl_handle_int(oidp, &val, 0, req);
	if (error == 0 && req->newptr != NULL && facility_initialized[num])
		facility[num - 1] = val;
	return (error);
}

/* p31b_setcfg: Set the configuration
 */
void
p31b_setcfg(int num, int value)
{

	if (P31B_VALID(num)) {
		facility[num - 1] = value;
		facility_initialized[num - 1] = 1;
	}
}

void
p31b_unsetcfg(int num)
{

	facility[num - 1] = 0;
	facility_initialized[num -1] = 0;
}

int
p31b_getcfg(int num)
{

	if (P31B_VALID(num))
		return (facility[num - 1]);
	return (0);
}

int
p31b_iscfg(int num)
{

	if (P31B_VALID(num))
		return (facility_initialized[num - 1]);
	return (0);
}

/*
 * Turn on indications for standard (non-configurable) kernel features.
 */
static void
p31b_set_standard(void *dummy)
{

	p31b_setcfg(CTL_P1003_1B_FSYNC, 200112L);
	p31b_setcfg(CTL_P1003_1B_MAPPED_FILES, 200112L);
	p31b_setcfg(CTL_P1003_1B_SHARED_MEMORY_OBJECTS, 200112L);
	p31b_setcfg(CTL_P1003_1B_PAGESIZE, PAGE_SIZE);
	if (!p31b_iscfg(CTL_P1003_1B_AIO_LISTIO_MAX))
		p31b_setcfg(CTL_P1003_1B_AIO_LISTIO_MAX, -1);
	if (!p31b_iscfg(CTL_P1003_1B_AIO_MAX))
		p31b_setcfg(CTL_P1003_1B_AIO_MAX, -1);
	if (!p31b_iscfg(CTL_P1003_1B_AIO_PRIO_DELTA_MAX))
		p31b_setcfg(CTL_P1003_1B_AIO_PRIO_DELTA_MAX, -1);
}

SYSINIT(p31b_set_standard, SI_SUB_P1003_1B, SI_ORDER_ANY, p31b_set_standard, 
	0);