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 extern rctl_hndl_t rc_process_sigqueue; 51 52 long 53 sysconfig(int which) 54 { 55 switch (which) { 56 57 /* 58 * if it is not handled in mach_sysconfig either 59 * it must be EINVAL. 60 */ 61 default: 62 return (mach_sysconfig(which)); /* `uname -i`/os */ 63 64 case _CONFIG_CLK_TCK: 65 return ((long)hz); /* clock frequency per second */ 66 67 case _CONFIG_PROF_TCK: 68 return ((long)hz); /* profiling clock freq per sec */ 69 70 case _CONFIG_NGROUPS: 71 /* 72 * Maximum number of supplementary groups. 73 */ 74 return (ngroups_max); 75 76 case _CONFIG_OPEN_FILES: 77 /* 78 * Maximum number of open files (soft limit). 79 */ 80 { 81 rlim64_t fd_ctl; 82 mutex_enter(&curproc->p_lock); 83 fd_ctl = rctl_enforced_value( 84 rctlproc_legacy[RLIMIT_NOFILE], curproc->p_rctls, 85 curproc); 86 mutex_exit(&curproc->p_lock); 87 return ((ulong_t)fd_ctl); 88 } 89 90 case _CONFIG_CHILD_MAX: 91 /* 92 * Maximum number of processes. 93 */ 94 return (v.v_maxup); 95 96 case _CONFIG_POSIX_VER: 97 return (_POSIX_VERSION); /* current POSIX version */ 98 99 case _CONFIG_PAGESIZE: 100 return (PAGESIZE); 101 102 case _CONFIG_XOPEN_VER: 103 return (_XOPEN_VERSION); /* current XOPEN version */ 104 105 case _CONFIG_NPROC_CONF: 106 return (zone_ncpus_get(curproc->p_zone)); 107 108 case _CONFIG_NPROC_ONLN: 109 return (zone_ncpus_online_get(curproc->p_zone)); 110 111 case _CONFIG_NPROC_MAX: 112 return (max_ncpus); 113 114 case _CONFIG_STACK_PROT: 115 return (curproc->p_stkprot & ~PROT_USER); 116 117 case _CONFIG_AIO_LISTIO_MAX: 118 return (_AIO_LISTIO_MAX); 119 120 case _CONFIG_AIO_MAX: 121 return (_AIO_MAX); 122 123 case _CONFIG_AIO_PRIO_DELTA_MAX: 124 return (0); 125 126 case _CONFIG_DELAYTIMER_MAX: 127 return (INT_MAX); 128 129 case _CONFIG_MQ_OPEN_MAX: 130 return (_MQ_OPEN_MAX); 131 132 case _CONFIG_MQ_PRIO_MAX: 133 return (_MQ_PRIO_MAX); 134 135 case _CONFIG_RTSIG_MAX: 136 return (_SIGRTMAX - _SIGRTMIN + 1); 137 138 case _CONFIG_SEM_NSEMS_MAX: 139 return (_SEM_NSEMS_MAX); 140 141 case _CONFIG_SEM_VALUE_MAX: 142 return (_SEM_VALUE_MAX); 143 144 case _CONFIG_SIGQUEUE_MAX: 145 /* 146 * Maximum number of outstanding queued signals. 147 */ 148 { 149 rlim64_t sigqsz_max; 150 mutex_enter(&curproc->p_lock); 151 sigqsz_max = rctl_enforced_value(rc_process_sigqueue, 152 curproc->p_rctls, curproc); 153 mutex_exit(&curproc->p_lock); 154 return ((uint_t)sigqsz_max); 155 } 156 157 case _CONFIG_SIGRT_MIN: 158 return (_SIGRTMIN); 159 160 case _CONFIG_SIGRT_MAX: 161 return (_SIGRTMAX); 162 163 case _CONFIG_TIMER_MAX: 164 return (timer_max); 165 166 case _CONFIG_PHYS_PAGES: 167 /* 168 * If the non-global zone has a phys. memory cap, use that. 169 * We always report the system-wide value for the global zone, 170 * even though rcapd can be used on the global zone too. 171 */ 172 if (!INGLOBALZONE(curproc) && 173 curproc->p_zone->zone_phys_mcap != 0) 174 return (MIN(btop(curproc->p_zone->zone_phys_mcap), 175 physinstalled)); 176 177 return (physinstalled); 178 179 case _CONFIG_AVPHYS_PAGES: 180 /* 181 * If the non-global zone has a phys. memory cap, use 182 * the phys. memory cap - zone's current rss. We always 183 * report the system-wide value for the global zone, even 184 * though rcapd can be used on the global zone too. 185 */ 186 if (!INGLOBALZONE(curproc) && 187 curproc->p_zone->zone_phys_mcap != 0) { 188 pgcnt_t cap, rss, free; 189 vmusage_t in_use; 190 size_t cnt = 1; 191 192 cap = btop(curproc->p_zone->zone_phys_mcap); 193 if (cap > physinstalled) 194 return (freemem); 195 196 if (vm_getusage(VMUSAGE_ZONE, 1, &in_use, &cnt, 197 FKIOCTL) != 0) 198 in_use.vmu_rss_all = 0; 199 rss = btop(in_use.vmu_rss_all); 200 /* 201 * Because rcapd implements a soft cap, it is possible 202 * for rss to be temporarily over the cap. 203 */ 204 if (cap > rss) 205 free = cap - rss; 206 else 207 free = 0; 208 return (MIN(free, freemem)); 209 } 210 211 return (freemem); 212 213 case _CONFIG_MAXPID: 214 return (maxpid); 215 216 case _CONFIG_CPUID_MAX: 217 return (max_cpuid); 218 219 case _CONFIG_EPHID_MAX: 220 return (MAXEPHUID); 221 222 case _CONFIG_SYMLOOP_MAX: 223 return (MAXSYMLINKS); 224 } 225 } 226