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 #include <vm/as.h> 50 51 extern rctl_hndl_t rc_process_sigqueue; 52 53 long 54 sysconfig(int which) 55 { 56 switch (which) { 57 58 /* 59 * if it is not handled in mach_sysconfig either 60 * it must be EINVAL. 61 */ 62 default: 63 return (mach_sysconfig(which)); /* `uname -i`/os */ 64 65 case _CONFIG_CLK_TCK: 66 return ((long)hz); /* clock frequency per second */ 67 68 case _CONFIG_PROF_TCK: 69 return ((long)hz); /* profiling clock freq per sec */ 70 71 case _CONFIG_NGROUPS: 72 /* 73 * Maximum number of supplementary groups. 74 */ 75 return (ngroups_max); 76 77 case _CONFIG_OPEN_FILES: 78 /* 79 * Maximum number of open files (soft limit). 80 */ 81 { 82 rlim64_t fd_ctl; 83 mutex_enter(&curproc->p_lock); 84 fd_ctl = rctl_enforced_value( 85 rctlproc_legacy[RLIMIT_NOFILE], curproc->p_rctls, 86 curproc); 87 mutex_exit(&curproc->p_lock); 88 return ((ulong_t)fd_ctl); 89 } 90 91 case _CONFIG_CHILD_MAX: 92 /* 93 * Maximum number of processes. 94 */ 95 return (v.v_maxup); 96 97 case _CONFIG_POSIX_VER: 98 return (_POSIX_VERSION); /* current POSIX version */ 99 100 case _CONFIG_PAGESIZE: 101 return (PAGESIZE); 102 103 case _CONFIG_XOPEN_VER: 104 return (_XOPEN_VERSION); /* current XOPEN version */ 105 106 case _CONFIG_NPROC_CONF: 107 return (zone_ncpus_get(curproc->p_zone)); 108 109 case _CONFIG_NPROC_ONLN: 110 return (zone_ncpus_online_get(curproc->p_zone)); 111 112 case _CONFIG_NPROC_MAX: 113 return (max_ncpus); 114 115 case _CONFIG_STACK_PROT: 116 return (curproc->p_stkprot & ~PROT_USER); 117 118 case _CONFIG_AIO_LISTIO_MAX: 119 return (_AIO_LISTIO_MAX); 120 121 case _CONFIG_AIO_MAX: 122 return (_AIO_MAX); 123 124 case _CONFIG_AIO_PRIO_DELTA_MAX: 125 return (0); 126 127 case _CONFIG_DELAYTIMER_MAX: 128 return (INT_MAX); 129 130 case _CONFIG_MQ_OPEN_MAX: 131 return (_MQ_OPEN_MAX); 132 133 case _CONFIG_MQ_PRIO_MAX: 134 return (_MQ_PRIO_MAX); 135 136 case _CONFIG_RTSIG_MAX: 137 return (_SIGRTMAX - _SIGRTMIN + 1); 138 139 case _CONFIG_SEM_NSEMS_MAX: 140 return (_SEM_NSEMS_MAX); 141 142 case _CONFIG_SEM_VALUE_MAX: 143 return (_SEM_VALUE_MAX); 144 145 case _CONFIG_SIGQUEUE_MAX: 146 /* 147 * Maximum number of outstanding queued signals. 148 */ 149 { 150 rlim64_t sigqsz_max; 151 mutex_enter(&curproc->p_lock); 152 sigqsz_max = rctl_enforced_value(rc_process_sigqueue, 153 curproc->p_rctls, curproc); 154 mutex_exit(&curproc->p_lock); 155 return ((uint_t)sigqsz_max); 156 } 157 158 case _CONFIG_SIGRT_MIN: 159 return (_SIGRTMIN); 160 161 case _CONFIG_SIGRT_MAX: 162 return (_SIGRTMAX); 163 164 case _CONFIG_TIMER_MAX: 165 return (timer_max); 166 167 case _CONFIG_PHYS_PAGES: 168 /* 169 * If the non-global zone has a phys. memory cap, use that. 170 * We always report the system-wide value for the global zone, 171 * even though rcapd can be used on the global zone too. 172 */ 173 if (!INGLOBALZONE(curproc) && 174 curproc->p_zone->zone_phys_mcap != 0) 175 return (MIN(btop(curproc->p_zone->zone_phys_mcap), 176 physinstalled)); 177 178 return (physinstalled); 179 180 case _CONFIG_AVPHYS_PAGES: 181 /* 182 * If the non-global zone has a phys. memory cap, use 183 * the phys. memory cap - zone's current rss. We always 184 * report the system-wide value for the global zone, even 185 * though rcapd can be used on the global zone too. 186 */ 187 if (!INGLOBALZONE(curproc) && 188 curproc->p_zone->zone_phys_mcap != 0) { 189 pgcnt_t cap, rss, free; 190 vmusage_t in_use; 191 size_t cnt = 1; 192 193 cap = btop(curproc->p_zone->zone_phys_mcap); 194 if (cap > physinstalled) 195 return (freemem); 196 197 if (vm_getusage(VMUSAGE_ZONE, 1, &in_use, &cnt, 198 FKIOCTL) != 0) 199 in_use.vmu_rss_all = 0; 200 rss = btop(in_use.vmu_rss_all); 201 /* 202 * Because rcapd implements a soft cap, it is possible 203 * for rss to be temporarily over the cap. 204 */ 205 if (cap > rss) 206 free = cap - rss; 207 else 208 free = 0; 209 return (MIN(free, freemem)); 210 } 211 212 return (freemem); 213 214 case _CONFIG_MAXPID: 215 return (maxpid); 216 217 case _CONFIG_CPUID_MAX: 218 return (max_cpuid); 219 220 case _CONFIG_EPHID_MAX: 221 return (MAXEPHUID); 222 223 case _CONFIG_UADDR_MAX: 224 return ((long)(uintptr_t)curproc->p_as->a_userlimit); 225 226 case _CONFIG_SYMLOOP_MAX: 227 return (MAXSYMLINKS); 228 } 229 } 230