FreeBSD/Linux Kernel Cross Reference
sys/kern/posix4_mib.c

     /*-
      * 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);

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