The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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

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    1 /*-
    2  * Copyright (c) 1998
    3  *      HD Associates, Inc.  All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 3. All advertising materials mentioning features or use of this software
   14  *    must display the following acknowledgement:
   15  *      This product includes software developed by HD Associates, Inc
   16  * 4. Neither the name of the author nor the names of any co-contributors
   17  *    may be used to endorse or promote products derived from this software
   18  *    without specific prior written permission.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY HD ASSOCIATES AND CONTRIBUTORS ``AS IS'' AND
   21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   23  * ARE DISCLAIMED.  IN NO EVENT SHALL HD ASSOCIATES OR CONTRIBUTORS BE LIABLE
   24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   30  * SUCH DAMAGE.
   31  */
   32 
   33 #include <sys/cdefs.h>
   34 __FBSDID("$FreeBSD: releng/10.1/sys/kern/posix4_mib.c 224159 2011-07-17 23:05:24Z rwatson $");
   35 
   36 #include <sys/param.h>
   37 #include <sys/systm.h>
   38 #include <sys/kernel.h>
   39 #include <sys/queue.h>
   40 #include <sys/sysctl.h>
   41 #include <sys/vnode.h>
   42 #include <sys/proc.h>
   43 #include <sys/posix4.h>
   44 
   45 static int facility[CTL_P1003_1B_MAXID - 1];
   46 static int facility_initialized[CTL_P1003_1B_MAXID - 1];
   47 
   48 static int p31b_sysctl_proc(SYSCTL_HANDLER_ARGS);
   49 
   50 /* OID_AUTO isn't working with sysconf(3).  I guess I'd have to
   51  * modify it to do a lookup by name from the index.
   52  * For now I've left it a top-level sysctl.
   53  */
   54 
   55 #if 1
   56 
   57 SYSCTL_DECL(_p1003_1b);
   58 
   59 #define P1B_SYSCTL(num, name)  \
   60         SYSCTL_INT(_p1003_1b, num, name, CTLFLAG_RD | CTLFLAG_CAPRD, \
   61         facility + num - 1, 0, "");
   62 #define P1B_SYSCTL_RW(num, name)  \
   63         SYSCTL_PROC(_p1003_1b, num, name, CTLTYPE_INT | CTLFLAG_RW, NULL, num, \
   64             p31b_sysctl_proc, "I", "");
   65 
   66 #else
   67 
   68 SYSCTL_DECL(_kern_p1003_1b);
   69 
   70 #define P1B_SYSCTL(num, name)  \
   71         SYSCTL_INT(_kern_p1003_1b, OID_AUTO, name, CTLFLAG_RD | CTLFLAG_CAPRD, \
   72             facility + num - 1, 0, "");
   73 #define P1B_SYSCTL_RW(num, name)  \
   74         SYSCTL_PROC(_p1003_1b, OID_AUTO, name, CTLTYPE_INT | CTLFLAG_RW, NULL, \
   75             num, p31b_sysctl_proc, "I", "");
   76 SYSCTL_NODE(_kern, OID_AUTO, p1003_1b, CTLFLAG_RW, 0, "P1003.1B");
   77 
   78 #endif
   79 
   80 SYSCTL_INT(_p1003_1b, CTL_P1003_1B_ASYNCHRONOUS_IO, \
   81         asynchronous_io, CTLFLAG_RD, &async_io_version, 0, "");
   82 P1B_SYSCTL(CTL_P1003_1B_MAPPED_FILES, mapped_files);
   83 P1B_SYSCTL(CTL_P1003_1B_MEMLOCK, memlock);
   84 P1B_SYSCTL(CTL_P1003_1B_MEMLOCK_RANGE, memlock_range);
   85 P1B_SYSCTL(CTL_P1003_1B_MEMORY_PROTECTION, memory_protection);
   86 P1B_SYSCTL(CTL_P1003_1B_MESSAGE_PASSING, message_passing);
   87 P1B_SYSCTL(CTL_P1003_1B_PRIORITIZED_IO, prioritized_io);
   88 P1B_SYSCTL(CTL_P1003_1B_PRIORITY_SCHEDULING, priority_scheduling);
   89 P1B_SYSCTL(CTL_P1003_1B_REALTIME_SIGNALS, realtime_signals);
   90 P1B_SYSCTL(CTL_P1003_1B_SEMAPHORES, semaphores);
   91 P1B_SYSCTL(CTL_P1003_1B_FSYNC, fsync);
   92 P1B_SYSCTL(CTL_P1003_1B_SHARED_MEMORY_OBJECTS, shared_memory_objects);
   93 P1B_SYSCTL(CTL_P1003_1B_SYNCHRONIZED_IO, synchronized_io);
   94 P1B_SYSCTL(CTL_P1003_1B_TIMERS, timers);
   95 P1B_SYSCTL(CTL_P1003_1B_AIO_LISTIO_MAX, aio_listio_max);
   96 P1B_SYSCTL(CTL_P1003_1B_AIO_MAX, aio_max);
   97 P1B_SYSCTL(CTL_P1003_1B_AIO_PRIO_DELTA_MAX, aio_prio_delta_max);
   98 P1B_SYSCTL(CTL_P1003_1B_DELAYTIMER_MAX, delaytimer_max);
   99 P1B_SYSCTL(CTL_P1003_1B_MQ_OPEN_MAX, mq_open_max);
  100 P1B_SYSCTL(CTL_P1003_1B_PAGESIZE, pagesize);
  101 P1B_SYSCTL(CTL_P1003_1B_RTSIG_MAX, rtsig_max);
  102 P1B_SYSCTL_RW(CTL_P1003_1B_SEM_NSEMS_MAX, sem_nsems_max);
  103 P1B_SYSCTL(CTL_P1003_1B_SEM_VALUE_MAX, sem_value_max);
  104 P1B_SYSCTL(CTL_P1003_1B_SIGQUEUE_MAX, sigqueue_max);
  105 P1B_SYSCTL(CTL_P1003_1B_TIMER_MAX, timer_max);
  106 
  107 #define P31B_VALID(num) ((num) >= 1 && (num) < CTL_P1003_1B_MAXID)
  108 
  109 static int
  110 p31b_sysctl_proc(SYSCTL_HANDLER_ARGS)
  111 {
  112         int error, num, val;
  113 
  114         num = arg2;
  115         if (!P31B_VALID(num))
  116                 return (EINVAL);
  117         val = facility_initialized[num] ? facility[num - 1] : 0;
  118         error = sysctl_handle_int(oidp, &val, 0, req);
  119         if (error == 0 && req->newptr != NULL && facility_initialized[num])
  120                 facility[num - 1] = val;
  121         return (error);
  122 }
  123 
  124 /* p31b_setcfg: Set the configuration
  125  */
  126 void
  127 p31b_setcfg(int num, int value)
  128 {
  129 
  130         if (P31B_VALID(num)) {
  131                 facility[num - 1] = value;
  132                 facility_initialized[num - 1] = 1;
  133         }
  134 }
  135 
  136 void
  137 p31b_unsetcfg(int num)
  138 {
  139 
  140         facility[num - 1] = 0;
  141         facility_initialized[num -1] = 0;
  142 }
  143 
  144 int
  145 p31b_getcfg(int num)
  146 {
  147 
  148         if (P31B_VALID(num))
  149                 return (facility[num - 1]);
  150         return (0);
  151 }
  152 
  153 int
  154 p31b_iscfg(int num)
  155 {
  156 
  157         if (P31B_VALID(num))
  158                 return (facility_initialized[num - 1]);
  159         return (0);
  160 }
  161 
  162 /*
  163  * Turn on indications for standard (non-configurable) kernel features.
  164  */
  165 static void
  166 p31b_set_standard(void *dummy)
  167 {
  168 
  169         p31b_setcfg(CTL_P1003_1B_FSYNC, 200112L);
  170         p31b_setcfg(CTL_P1003_1B_MAPPED_FILES, 200112L);
  171         p31b_setcfg(CTL_P1003_1B_SHARED_MEMORY_OBJECTS, 200112L);
  172         p31b_setcfg(CTL_P1003_1B_PAGESIZE, PAGE_SIZE);
  173         if (!p31b_iscfg(CTL_P1003_1B_AIO_LISTIO_MAX))
  174                 p31b_setcfg(CTL_P1003_1B_AIO_LISTIO_MAX, -1);
  175         if (!p31b_iscfg(CTL_P1003_1B_AIO_MAX))
  176                 p31b_setcfg(CTL_P1003_1B_AIO_MAX, -1);
  177         if (!p31b_iscfg(CTL_P1003_1B_AIO_PRIO_DELTA_MAX))
  178                 p31b_setcfg(CTL_P1003_1B_AIO_PRIO_DELTA_MAX, -1);
  179 }
  180 
  181 SYSINIT(p31b_set_standard, SI_SUB_P1003_1B, SI_ORDER_ANY, p31b_set_standard, 
  182         0);
  183 

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