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 * Copyright 2016 Joyent, Inc. 26 */ 27 28 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 29 /* All Rights Reserved */ 30 31 #include <sys/param.h> 32 #include <sys/types.h> 33 #include <sys/sysmacros.h> 34 #include <sys/systm.h> 35 #include <sys/tuneable.h> 36 #include <sys/errno.h> 37 #include <sys/var.h> 38 #include <sys/signal.h> 39 #include <sys/time.h> 40 #include <sys/sysconfig.h> 41 #include <sys/resource.h> 42 #include <sys/ulimit.h> 43 #include <sys/unistd.h> 44 #include <sys/debug.h> 45 #include <sys/cpuvar.h> 46 #include <sys/mman.h> 47 #include <sys/timer.h> 48 #include <sys/zone.h> 49 #include <sys/vm_usage.h> 50 #include <vm/as.h> 51 52 extern rctl_hndl_t rc_process_sigqueue; 53 54 long 55 sysconfig(int which) 56 { 57 switch (which) { 58 59 /* 60 * if it is not handled in mach_sysconfig either 61 * it must be EINVAL. 62 */ 63 default: 64 return (mach_sysconfig(which)); /* `uname -i`/os */ 65 66 case _CONFIG_CLK_TCK: 67 return ((long)hz); /* clock frequency per second */ 68 69 case _CONFIG_PROF_TCK: 70 return ((long)hz); /* profiling clock freq per sec */ 71 72 case _CONFIG_NGROUPS: 73 /* 74 * Maximum number of supplementary groups. 75 */ 76 return (ngroups_max); 77 78 case _CONFIG_OPEN_FILES: 79 /* 80 * Maximum number of open files (soft limit). 81 */ 82 { 83 rlim64_t fd_ctl; 84 mutex_enter(&curproc->p_lock); 85 fd_ctl = rctl_enforced_value( 86 rctlproc_legacy[RLIMIT_NOFILE], curproc->p_rctls, 87 curproc); 88 mutex_exit(&curproc->p_lock); 89 return ((ulong_t)fd_ctl); 90 } 91 92 case _CONFIG_CHILD_MAX: 93 /* 94 * Maximum number of processes. 95 */ 96 return (v.v_maxup); 97 98 case _CONFIG_POSIX_VER: 99 return (_POSIX_VERSION); /* current POSIX version */ 100 101 case _CONFIG_PAGESIZE: 102 return (PAGESIZE); 103 104 case _CONFIG_XOPEN_VER: 105 return (_XOPEN_VERSION); /* current XOPEN version */ 106 107 case _CONFIG_NPROC_CONF: 108 return (zone_ncpus_get(curproc->p_zone)); 109 110 case _CONFIG_NPROC_ONLN: 111 return (zone_ncpus_online_get(curproc->p_zone)); 112 113 case _CONFIG_NPROC_MAX: 114 return (max_ncpus); 115 116 case _CONFIG_NPROC_NCPU: 117 return (NCPU); /* Private sysconfig for direct NCPU access */ 118 119 case _CONFIG_STACK_PROT: 120 return (curproc->p_stkprot & ~PROT_USER); 121 122 case _CONFIG_AIO_LISTIO_MAX: 123 return (_AIO_LISTIO_MAX); 124 125 case _CONFIG_AIO_MAX: 126 return (_AIO_MAX); 127 128 case _CONFIG_AIO_PRIO_DELTA_MAX: 129 return (0); 130 131 case _CONFIG_DELAYTIMER_MAX: 132 return (INT_MAX); 133 134 case _CONFIG_MQ_OPEN_MAX: 135 return (_MQ_OPEN_MAX); 136 137 case _CONFIG_MQ_PRIO_MAX: 138 return (_MQ_PRIO_MAX); 139 140 case _CONFIG_RTSIG_MAX: 141 return (_SIGRTMAX - _SIGRTMIN + 1); 142 143 case _CONFIG_SEM_NSEMS_MAX: 144 return (_SEM_NSEMS_MAX); 145 146 case _CONFIG_SEM_VALUE_MAX: 147 return (_SEM_VALUE_MAX); 148 149 case _CONFIG_SIGQUEUE_MAX: 150 /* 151 * Maximum number of outstanding queued signals. 152 */ 153 { 154 rlim64_t sigqsz_max; 155 mutex_enter(&curproc->p_lock); 156 sigqsz_max = rctl_enforced_value(rc_process_sigqueue, 157 curproc->p_rctls, curproc); 158 mutex_exit(&curproc->p_lock); 159 return ((uint_t)sigqsz_max); 160 } 161 162 case _CONFIG_SIGRT_MIN: 163 return (_SIGRTMIN); 164 165 case _CONFIG_SIGRT_MAX: 166 return (_SIGRTMAX); 167 168 case _CONFIG_TIMER_MAX: 169 return (timer_max); 170 171 case _CONFIG_PHYS_PAGES: 172 /* 173 * If the non-global zone has a phys. memory cap, use that. 174 * We always report the system-wide value for the global zone, 175 * even though rcapd can be used on the global zone too. 176 */ 177 if (!INGLOBALZONE(curproc) && 178 curproc->p_zone->zone_phys_mcap != 0) 179 return (MIN(btop(curproc->p_zone->zone_phys_mcap), 180 physinstalled)); 181 182 return (physinstalled); 183 184 case _CONFIG_AVPHYS_PAGES: 185 /* 186 * If the non-global zone has a phys. memory cap, use 187 * the phys. memory cap - zone's current rss. We always 188 * report the system-wide value for the global zone, even 189 * though rcapd can be used on the global zone too. 190 */ 191 if (!INGLOBALZONE(curproc) && 192 curproc->p_zone->zone_phys_mcap != 0) { 193 pgcnt_t cap, rss, free; 194 vmusage_t in_use; 195 size_t cnt = 1; 196 197 cap = btop(curproc->p_zone->zone_phys_mcap); 198 if (cap > physinstalled) 199 return (freemem); 200 201 if (vm_getusage(VMUSAGE_ZONE, 1, &in_use, &cnt, 202 FKIOCTL) != 0) 203 in_use.vmu_rss_all = 0; 204 rss = btop(in_use.vmu_rss_all); 205 /* 206 * Because rcapd implements a soft cap, it is possible 207 * for rss to be temporarily over the cap. 208 */ 209 if (cap > rss) 210 free = cap - rss; 211 else 212 free = 0; 213 return (MIN(free, freemem)); 214 } 215 216 return (freemem); 217 218 case _CONFIG_MAXPID: 219 return (maxpid); 220 221 case _CONFIG_CPUID_MAX: 222 return (max_cpuid); 223 224 case _CONFIG_EPHID_MAX: 225 return (MAXEPHUID); 226 227 case _CONFIG_UADDR_MAX: 228 return ((long)(uintptr_t)curproc->p_as->a_userlimit); 229 230 case _CONFIG_SYMLOOP_MAX: 231 return (MAXSYMLINKS); 232 } 233 } 234