1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 28 /* All Rights Reserved */ 29 30 #include <sys/param.h> 31 #include <sys/types.h> 32 #include <sys/sysmacros.h> 33 #include <sys/systm.h> 34 #include <sys/tuneable.h> 35 #include <sys/errno.h> 36 #include <sys/var.h> 37 #include <sys/signal.h> 38 #include <sys/time.h> 39 #include <sys/sysconfig.h> 40 #include <sys/resource.h> 41 #include <sys/ulimit.h> 42 #include <sys/unistd.h> 43 #include <sys/debug.h> 44 #include <sys/cpuvar.h> 45 #include <sys/mman.h> 46 #include <sys/timer.h> 47 #include <sys/zone.h> 48 #include <sys/vm_usage.h> 49 50 long 51 sysconfig(int which) 52 { 53 switch (which) { 54 55 /* 56 * if it is not handled in mach_sysconfig either 57 * it must be EINVAL. 58 */ 59 default: 60 return (mach_sysconfig(which)); /* `uname -i`/os */ 61 62 case _CONFIG_CLK_TCK: 63 return ((long)hz); /* clock frequency per second */ 64 65 case _CONFIG_PROF_TCK: 66 return ((long)hz); /* profiling clock freq per sec */ 67 68 case _CONFIG_NGROUPS: 69 /* 70 * Maximum number of supplementary groups. 71 */ 72 return (ngroups_max); 73 74 case _CONFIG_OPEN_FILES: 75 /* 76 * Maximum number of open files (soft limit). 77 */ 78 { 79 rlim64_t fd_ctl; 80 mutex_enter(&curproc->p_lock); 81 fd_ctl = rctl_enforced_value( 82 rctlproc_legacy[RLIMIT_NOFILE], curproc->p_rctls, 83 curproc); 84 mutex_exit(&curproc->p_lock); 85 return ((ulong_t)fd_ctl); 86 } 87 88 case _CONFIG_CHILD_MAX: 89 /* 90 * Maximum number of processes. 91 */ 92 return (v.v_maxup); 93 94 case _CONFIG_POSIX_VER: 95 return (_POSIX_VERSION); /* current POSIX version */ 96 97 case _CONFIG_PAGESIZE: 98 return (PAGESIZE); 99 100 case _CONFIG_XOPEN_VER: 101 return (_XOPEN_VERSION); /* current XOPEN version */ 102 103 case _CONFIG_NPROC_CONF: 104 return (zone_ncpus_get(curproc->p_zone)); 105 106 case _CONFIG_NPROC_ONLN: 107 return (zone_ncpus_online_get(curproc->p_zone)); 108 109 case _CONFIG_NPROC_MAX: 110 return (max_ncpus); 111 112 case _CONFIG_STACK_PROT: 113 return (curproc->p_stkprot & ~PROT_USER); 114 115 case _CONFIG_AIO_LISTIO_MAX: 116 return (_AIO_LISTIO_MAX); 117 118 case _CONFIG_AIO_MAX: 119 return (_AIO_MAX); 120 121 case _CONFIG_AIO_PRIO_DELTA_MAX: 122 return (0); 123 124 case _CONFIG_DELAYTIMER_MAX: 125 return (INT_MAX); 126 127 case _CONFIG_MQ_OPEN_MAX: 128 return (_MQ_OPEN_MAX); 129 130 case _CONFIG_MQ_PRIO_MAX: 131 return (_MQ_PRIO_MAX); 132 133 case _CONFIG_RTSIG_MAX: 134 return (_SIGRTMAX - _SIGRTMIN + 1); 135 136 case _CONFIG_SEM_NSEMS_MAX: 137 return (_SEM_NSEMS_MAX); 138 139 case _CONFIG_SEM_VALUE_MAX: 140 return (_SEM_VALUE_MAX); 141 142 case _CONFIG_SIGQUEUE_MAX: 143 return (_SIGQUEUE_MAX); 144 145 case _CONFIG_SIGRT_MIN: 146 return (_SIGRTMIN); 147 148 case _CONFIG_SIGRT_MAX: 149 return (_SIGRTMAX); 150 151 case _CONFIG_TIMER_MAX: 152 return (timer_max); 153 154 case _CONFIG_PHYS_PAGES: 155 /* 156 * If the non-global zone has a phys. memory cap, use that. 157 * We always report the system-wide value for the global zone, 158 * even though rcapd can be used on the global zone too. 159 */ 160 if (!INGLOBALZONE(curproc) && 161 curproc->p_zone->zone_phys_mcap != 0) 162 return (MIN(btop(curproc->p_zone->zone_phys_mcap), 163 physinstalled)); 164 165 return (physinstalled); 166 167 case _CONFIG_AVPHYS_PAGES: 168 /* 169 * If the non-global zone has a phys. memory cap, use 170 * the phys. memory cap - zone's current rss. We always 171 * report the system-wide value for the global zone, even 172 * though rcapd can be used on the global zone too. 173 */ 174 if (!INGLOBALZONE(curproc) && 175 curproc->p_zone->zone_phys_mcap != 0) { 176 pgcnt_t cap, rss, free; 177 vmusage_t in_use; 178 size_t cnt = 1; 179 180 cap = btop(curproc->p_zone->zone_phys_mcap); 181 if (cap > physinstalled) 182 return (freemem); 183 184 if (vm_getusage(VMUSAGE_ZONE, 1, &in_use, &cnt, 185 FKIOCTL) != 0) 186 in_use.vmu_rss_all = 0; 187 rss = btop(in_use.vmu_rss_all); 188 /* 189 * Because rcapd implements a soft cap, it is possible 190 * for rss to be temporarily over the cap. 191 */ 192 if (cap > rss) 193 free = cap - rss; 194 else 195 free = 0; 196 return (MIN(free, freemem)); 197 } 198 199 return (freemem); 200 201 case _CONFIG_MAXPID: 202 return (maxpid); 203 204 case _CONFIG_CPUID_MAX: 205 return (max_cpuid); 206 207 case _CONFIG_EPHID_MAX: 208 return (MAXEPHUID); 209 210 case _CONFIG_SYMLOOP_MAX: 211 return (MAXSYMLINKS); 212 } 213 } 214