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 * Copyright 2026 Oxide Computer Company 27 */ 28 29 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 30 /* All Rights Reserved */ 31 32 #include <sys/param.h> 33 #include <sys/types.h> 34 #include <sys/sysmacros.h> 35 #include <sys/systm.h> 36 #include <sys/tuneable.h> 37 #include <sys/errno.h> 38 #include <sys/var.h> 39 #include <sys/signal.h> 40 #include <sys/time.h> 41 #include <sys/sysconfig.h> 42 #include <sys/resource.h> 43 #include <sys/ulimit.h> 44 #include <sys/unistd.h> 45 #include <sys/debug.h> 46 #include <sys/cpuvar.h> 47 #include <sys/mman.h> 48 #include <sys/timer.h> 49 #include <sys/uio.h> 50 #include <sys/zone.h> 51 #include <sys/vm_usage.h> 52 #include <vm/as.h> 53 54 extern rctl_hndl_t rc_process_sigqueue; 55 56 long 57 sysconfig(int which) 58 { 59 switch (which) { 60 61 /* 62 * if it is not handled in mach_sysconfig either 63 * it must be EINVAL. 64 */ 65 default: 66 return (mach_sysconfig(which)); /* `uname -i`/os */ 67 68 case _CONFIG_CLK_TCK: 69 return ((long)hz); /* clock frequency per second */ 70 71 case _CONFIG_PROF_TCK: 72 return ((long)hz); /* profiling clock freq per sec */ 73 74 case _CONFIG_NGROUPS: 75 /* 76 * Maximum number of supplementary groups. 77 */ 78 return (ngroups_max); 79 80 case _CONFIG_OPEN_FILES: 81 /* 82 * Maximum number of open files (soft limit). 83 */ 84 { 85 rlim64_t fd_ctl; 86 mutex_enter(&curproc->p_lock); 87 fd_ctl = rctl_enforced_value( 88 rctlproc_legacy[RLIMIT_NOFILE], curproc->p_rctls, 89 curproc); 90 mutex_exit(&curproc->p_lock); 91 return ((ulong_t)fd_ctl); 92 } 93 94 case _CONFIG_CHILD_MAX: 95 /* 96 * Maximum number of processes. 97 */ 98 return (v.v_maxup); 99 100 case _CONFIG_POSIX_VER: 101 return (_POSIX_VERSION); /* current POSIX version */ 102 103 case _CONFIG_PAGESIZE: 104 return (PAGESIZE); 105 106 case _CONFIG_XOPEN_VER: 107 return (_XOPEN_VERSION); /* current XOPEN version */ 108 109 case _CONFIG_NPROC_CONF: 110 return (zone_ncpus_get(curproc->p_zone)); 111 112 case _CONFIG_NPROC_ONLN: 113 return (zone_ncpus_online_get(curproc->p_zone)); 114 115 case _CONFIG_NPROC_MAX: 116 return (max_ncpus); 117 118 case _CONFIG_NPROC_NCPU: 119 return (NCPU); /* Private sysconfig for direct NCPU access */ 120 121 case _CONFIG_STACK_PROT: 122 return (curproc->p_stkprot & ~PROT_USER); 123 124 case _CONFIG_AIO_LISTIO_MAX: 125 return (_AIO_LISTIO_MAX); 126 127 case _CONFIG_AIO_MAX: 128 return (_AIO_MAX); 129 130 case _CONFIG_AIO_PRIO_DELTA_MAX: 131 return (0); 132 133 case _CONFIG_DELAYTIMER_MAX: 134 return (INT_MAX); 135 136 case _CONFIG_MQ_OPEN_MAX: 137 return (_MQ_OPEN_MAX); 138 139 case _CONFIG_MQ_PRIO_MAX: 140 return (_MQ_PRIO_MAX); 141 142 case _CONFIG_RTSIG_MAX: 143 return (_SIGRTMAX - _SIGRTMIN + 1); 144 145 case _CONFIG_SEM_NSEMS_MAX: 146 return (_SEM_NSEMS_MAX); 147 148 case _CONFIG_SEM_VALUE_MAX: 149 return (_SEM_VALUE_MAX); 150 151 case _CONFIG_SIGQUEUE_MAX: 152 /* 153 * Maximum number of outstanding queued signals. 154 */ 155 { 156 rlim64_t sigqsz_max; 157 mutex_enter(&curproc->p_lock); 158 sigqsz_max = rctl_enforced_value(rc_process_sigqueue, 159 curproc->p_rctls, curproc); 160 mutex_exit(&curproc->p_lock); 161 return ((uint_t)sigqsz_max); 162 } 163 164 case _CONFIG_SIGRT_MIN: 165 return (_SIGRTMIN); 166 167 case _CONFIG_SIGRT_MAX: 168 return (_SIGRTMAX); 169 170 case _CONFIG_TIMER_MAX: 171 return (timer_max); 172 173 case _CONFIG_PHYS_PAGES: 174 /* 175 * If the non-global zone has a phys. memory cap, use that. 176 * We always report the system-wide value for the global zone, 177 * even though rcapd can be used on the global zone too. 178 */ 179 if (!INGLOBALZONE(curproc) && 180 curproc->p_zone->zone_phys_mcap != 0) 181 return (MIN(btop(curproc->p_zone->zone_phys_mcap), 182 physinstalled)); 183 184 return (physinstalled); 185 186 case _CONFIG_AVPHYS_PAGES: 187 /* 188 * If the non-global zone has a phys. memory cap, use 189 * the phys. memory cap - zone's current rss. We always 190 * report the system-wide value for the global zone, even 191 * though rcapd can be used on the global zone too. 192 */ 193 if (!INGLOBALZONE(curproc) && 194 curproc->p_zone->zone_phys_mcap != 0) { 195 pgcnt_t cap, rss, free; 196 vmusage_t in_use; 197 size_t cnt = 1; 198 199 cap = btop(curproc->p_zone->zone_phys_mcap); 200 if (cap > physinstalled) 201 return (freemem); 202 203 if (vm_getusage(VMUSAGE_ZONE, 1, &in_use, &cnt, 204 UIO_SYSSPACE) != 0) 205 in_use.vmu_rss_all = 0; 206 rss = btop(in_use.vmu_rss_all); 207 /* 208 * Because rcapd implements a soft cap, it is possible 209 * for rss to be temporarily over the cap. 210 */ 211 if (cap > rss) 212 free = cap - rss; 213 else 214 free = 0; 215 return (MIN(free, freemem)); 216 } 217 218 return (freemem); 219 220 case _CONFIG_MAXPID: 221 return (maxpid); 222 223 case _CONFIG_CPUID_MAX: 224 return (max_cpuid); 225 226 case _CONFIG_EPHID_MAX: 227 return (MAXEPHUID); 228 229 case _CONFIG_UADDR_MAX: 230 return ((long)(uintptr_t)curproc->p_as->a_userlimit); 231 232 case _CONFIG_SYMLOOP_MAX: 233 return (MAXSYMLINKS); 234 } 235 } 236