posix4_mib.c

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/*-
 * SPDX-License-Identifier: BSD-4-Clause
 *
 * 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("$FreeBSD$");
 
#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 | CTLFLAG_NEEDGIANT, 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 | CTLFLAG_MPSAFE, 0,
    "P1003.1B");
 
#endif
 
P1B_SYSCTL(CTL_P1003_1B_ASYNCHRONOUS_IO, asynchronous_io);
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_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 - 1] ? facility[num - 1] : 0;
        error = sysctl_handle_int(oidp, &val, 0, req);
        if (error == 0 && req->newptr != NULL && facility_initialized[num - 1])
                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);
}
 
SYSINIT(p31b_set_standard, SI_SUB_P1003_1B, SI_ORDER_ANY, p31b_set_standard, 
    NULL);