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 }