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
Version:
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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/8.1/sys/kern/posix4_mib.c 208832 2010-06-05 14:53:34Z kib $"); 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, facility + num - 1, 0, ""); 61 #define P1B_SYSCTL_RW(num, name) \ 62 SYSCTL_PROC(_p1003_1b, num, name, CTLTYPE_INT | CTLFLAG_RW, NULL, num, \ 63 p31b_sysctl_proc, "I", ""); 64 65 #else 66 67 SYSCTL_DECL(_kern_p1003_1b); 68 69 #define P1B_SYSCTL(num, name) \ 70 SYSCTL_INT(_kern_p1003_1b, OID_AUTO, name, CTLFLAG_RD, \ 71 facility + num - 1, 0, ""); 72 #define P1B_SYSCTL_RW(num, name) \ 73 SYSCTL_PROC(_p1003_1b, OID_AUTO, name, CTLTYPE_INT | CTLFLAG_RW, NULL, \ 74 num, p31b_sysctl_proc, "I", ""); 75 SYSCTL_NODE(_kern, OID_AUTO, p1003_1b, CTLFLAG_RW, 0, "P1003.1B"); 76 77 #endif 78 79 SYSCTL_INT(_p1003_1b, CTL_P1003_1B_ASYNCHRONOUS_IO, \ 80 asynchronous_io, CTLFLAG_RD, &async_io_version, 0, ""); 81 P1B_SYSCTL(CTL_P1003_1B_MAPPED_FILES, mapped_files); 82 P1B_SYSCTL(CTL_P1003_1B_MEMLOCK, memlock); 83 P1B_SYSCTL(CTL_P1003_1B_MEMLOCK_RANGE, memlock_range); 84 P1B_SYSCTL(CTL_P1003_1B_MEMORY_PROTECTION, memory_protection); 85 P1B_SYSCTL(CTL_P1003_1B_MESSAGE_PASSING, message_passing); 86 P1B_SYSCTL(CTL_P1003_1B_PRIORITIZED_IO, prioritized_io); 87 P1B_SYSCTL(CTL_P1003_1B_PRIORITY_SCHEDULING, priority_scheduling); 88 P1B_SYSCTL(CTL_P1003_1B_REALTIME_SIGNALS, realtime_signals); 89 P1B_SYSCTL(CTL_P1003_1B_SEMAPHORES, semaphores); 90 P1B_SYSCTL(CTL_P1003_1B_FSYNC, fsync); 91 P1B_SYSCTL(CTL_P1003_1B_SHARED_MEMORY_OBJECTS, shared_memory_objects); 92 P1B_SYSCTL(CTL_P1003_1B_SYNCHRONIZED_IO, synchronized_io); 93 P1B_SYSCTL(CTL_P1003_1B_TIMERS, timers); 94 P1B_SYSCTL(CTL_P1003_1B_AIO_LISTIO_MAX, aio_listio_max); 95 P1B_SYSCTL(CTL_P1003_1B_AIO_MAX, aio_max); 96 P1B_SYSCTL(CTL_P1003_1B_AIO_PRIO_DELTA_MAX, aio_prio_delta_max); 97 P1B_SYSCTL(CTL_P1003_1B_DELAYTIMER_MAX, delaytimer_max); 98 P1B_SYSCTL(CTL_P1003_1B_MQ_OPEN_MAX, mq_open_max); 99 P1B_SYSCTL(CTL_P1003_1B_PAGESIZE, pagesize); 100 P1B_SYSCTL(CTL_P1003_1B_RTSIG_MAX, rtsig_max); 101 P1B_SYSCTL_RW(CTL_P1003_1B_SEM_NSEMS_MAX, sem_nsems_max); 102 P1B_SYSCTL(CTL_P1003_1B_SEM_VALUE_MAX, sem_value_max); 103 P1B_SYSCTL(CTL_P1003_1B_SIGQUEUE_MAX, sigqueue_max); 104 P1B_SYSCTL(CTL_P1003_1B_TIMER_MAX, timer_max); 105 106 #define P31B_VALID(num) ((num) >= 1 && (num) < CTL_P1003_1B_MAXID) 107 108 static int 109 p31b_sysctl_proc(SYSCTL_HANDLER_ARGS) 110 { 111 int error, num, val; 112 113 num = arg2; 114 if (!P31B_VALID(num)) 115 return (EINVAL); 116 val = facility_initialized[num] ? facility[num - 1] : 0; 117 error = sysctl_handle_int(oidp, &val, 0, req); 118 if (error == 0 && req->newptr != NULL && facility_initialized[num]) 119 facility[num - 1] = val; 120 return (error); 121 } 122 123 /* p31b_setcfg: Set the configuration 124 */ 125 void 126 p31b_setcfg(int num, int value) 127 { 128 129 if (P31B_VALID(num)) { 130 facility[num - 1] = value; 131 facility_initialized[num - 1] = 1; 132 } 133 } 134 135 void 136 p31b_unsetcfg(int num) 137 { 138 139 facility[num - 1] = 0; 140 facility_initialized[num -1] = 0; 141 } 142 143 int 144 p31b_getcfg(int num) 145 { 146 147 if (P31B_VALID(num)) 148 return (facility[num - 1]); 149 return (0); 150 } 151 152 int 153 p31b_iscfg(int num) 154 { 155 156 if (P31B_VALID(num)) 157 return (facility_initialized[num - 1]); 158 return (0); 159 } 160 161 /* 162 * Turn on indications for standard (non-configurable) kernel features. 163 */ 164 static void 165 p31b_set_standard(void *dummy) 166 { 167 /* ??? p31b_setcfg(CTL_P1003_1B_FSYNC, 1); */ 168 p31b_setcfg(CTL_P1003_1B_MAPPED_FILES, 1); 169 p31b_setcfg(CTL_P1003_1B_SHARED_MEMORY_OBJECTS, 1); 170 p31b_setcfg(CTL_P1003_1B_PAGESIZE, PAGE_SIZE); 171 if (!p31b_iscfg(CTL_P1003_1B_AIO_LISTIO_MAX)) 172 p31b_setcfg(CTL_P1003_1B_AIO_LISTIO_MAX, -1); 173 if (!p31b_iscfg(CTL_P1003_1B_AIO_MAX)) 174 p31b_setcfg(CTL_P1003_1B_AIO_MAX, -1); 175 if (!p31b_iscfg(CTL_P1003_1B_AIO_PRIO_DELTA_MAX)) 176 p31b_setcfg(CTL_P1003_1B_AIO_PRIO_DELTA_MAX, -1); 177 } 178 179 SYSINIT(p31b_set_standard, SI_SUB_P1003_1B, SI_ORDER_ANY, p31b_set_standard, 180 0); 181
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