kernel: Make SMP support default (and non-optional).
[dragonfly.git] / sys / kern / kern_mib.c
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1/*-
2 * Copyright (c) 1982, 1986, 1989, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Mike Karels at Berkeley Software Design, Inc.
7 *
8 * Quite extensively rewritten by Poul-Henning Kamp of the FreeBSD
9 * project, to make these variables more userfriendly.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 * must display the following acknowledgement:
21 * This product includes software developed by the University of
22 * California, Berkeley and its contributors.
23 * 4. Neither the name of the University nor the names of its contributors
24 * may be used to endorse or promote products derived from this software
25 * without specific prior written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 * SUCH DAMAGE.
38 *
39 * @(#)kern_sysctl.c 8.4 (Berkeley) 4/14/94
40 * $FreeBSD: src/sys/kern/kern_mib.c,v 1.29.2.4 2001/07/30 23:28:00 peter Exp $
41 */
42
43#include <sys/param.h>
44#include <sys/kernel.h>
45#include <sys/systm.h>
46#include <sys/sysctl.h>
47#include <sys/proc.h>
508ceb09 48#include <sys/lockf.h>
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49#include <sys/jail.h>
50#include <machine/smp.h>
51
52SYSCTL_NODE(, 0, sysctl, CTLFLAG_RW, 0,
53 "Sysctl internal magic");
54SYSCTL_NODE(, CTL_KERN, kern, CTLFLAG_RW, 0,
55 "High kernel, proc, limits &c");
56SYSCTL_NODE(, CTL_VM, vm, CTLFLAG_RW, 0,
57 "Virtual memory");
58SYSCTL_NODE(, CTL_VFS, vfs, CTLFLAG_RW, 0,
59 "File system");
60SYSCTL_NODE(, CTL_NET, net, CTLFLAG_RW, 0,
61 "Network, (see socket.h)");
62SYSCTL_NODE(, CTL_DEBUG, debug, CTLFLAG_RW, 0,
63 "Debugging");
64SYSCTL_NODE(_debug, OID_AUTO, sizeof, CTLFLAG_RW, 0,
80405ef9 65 "Size of various kernel data structures");
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66SYSCTL_NODE(, CTL_HW, hw, CTLFLAG_RW, 0,
67 "hardware");
68SYSCTL_NODE(, CTL_MACHDEP, machdep, CTLFLAG_RW, 0,
69 "machine dependent");
70SYSCTL_NODE(, CTL_USER, user, CTLFLAG_RW, 0,
71 "user-level");
72SYSCTL_NODE(, CTL_P1003_1B, p1003_1b, CTLFLAG_RW, 0,
73 "p1003_1b, (see p1003_1b.h)");
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74SYSCTL_NODE(, CTL_LWKT, lwkt, CTLFLAG_RW, 0,
75 "light weight kernel threads");
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76
77SYSCTL_NODE(, OID_AUTO, compat, CTLFLAG_RW, 0,
78 "Compatibility code");
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79SYSCTL_NODE(, OID_AUTO, security, CTLFLAG_RW, 0,
80 "Security");
984263bc 81
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82SYSCTL_STRING(_kern, OID_AUTO, ident, CTLFLAG_RD,
83 kern_ident, 0, "Kernel identifier");
84
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85SYSCTL_STRING(_kern, KERN_OSRELEASE, osrelease, CTLFLAG_RD,
86 osrelease, 0, "Operating system type");
87
88SYSCTL_INT(_kern, KERN_OSREV, osrevision, CTLFLAG_RD,
89 0, BSD, "Operating system revision");
90
91SYSCTL_STRING(_kern, KERN_VERSION, version, CTLFLAG_RD,
92 version, 0, "Kernel version");
93
94SYSCTL_STRING(_kern, KERN_OSTYPE, ostype, CTLFLAG_RD,
95 ostype, 0, "Operating system type");
96
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97SYSCTL_INT(_kern, KERN_OSRELDATE, osreldate, CTLFLAG_RD,
98 &osreldate, 0, "Operating system release date");
99
100SYSCTL_INT(_kern, KERN_MAXPROC, maxproc, CTLFLAG_RD,
101 &maxproc, 0, "Maximum number of processes");
102
103SYSCTL_INT(_kern, KERN_MAXPROCPERUID, maxprocperuid, CTLFLAG_RW,
104 &maxprocperuid, 0, "Maximum processes allowed per userid");
105
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106SYSCTL_INT(_kern, KERN_MAXPOSIXLOCKSPERUID, maxposixlocksperuid, CTLFLAG_RW,
107 &maxposixlocksperuid, 0, "Maximum number of POSIX-type locks per user id");
108
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109SYSCTL_INT(_kern, OID_AUTO, maxusers, CTLFLAG_RD,
110 &maxusers, 0, "Hint for kernel tuning");
111
112SYSCTL_INT(_kern, KERN_ARGMAX, argmax, CTLFLAG_RD,
113 0, ARG_MAX, "Maximum bytes of argument to execve(2)");
114
115SYSCTL_INT(_kern, KERN_POSIX1, posix1version, CTLFLAG_RD,
116 0, _KPOSIX_VERSION, "Version of POSIX attempting to comply to");
117
118SYSCTL_INT(_kern, KERN_NGROUPS, ngroups, CTLFLAG_RD,
119 0, NGROUPS_MAX, "Maximum number of groups a user can belong to");
120
121SYSCTL_INT(_kern, KERN_JOB_CONTROL, job_control, CTLFLAG_RD,
122 0, 1, "Whether job control is available");
123
124#ifdef _POSIX_SAVED_IDS
125SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD,
126 0, 1, "Whether saved set-group/user ID is available");
127#else
128SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD,
129 0, 0, "Whether saved set-group/user ID is available");
130#endif
131
132char kernelname[MAXPATHLEN] = "/kernel"; /* XXX bloat */
133
134SYSCTL_STRING(_kern, KERN_BOOTFILE, bootfile, CTLFLAG_RW,
135 kernelname, sizeof kernelname, "Name of kernel file booted");
136
984263bc 137SYSCTL_INT(_hw, HW_NCPU, ncpu, CTLFLAG_RD,
72740893 138 &ncpus, 0, "Number of active CPUs");
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139
140SYSCTL_INT(_hw, HW_BYTEORDER, byteorder, CTLFLAG_RD,
141 0, BYTE_ORDER, "System byte order");
142
143SYSCTL_INT(_hw, HW_PAGESIZE, pagesize, CTLFLAG_RD,
144 0, PAGE_SIZE, "System memory page size");
145
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146static char platform[] = MACHINE_PLATFORM;
147SYSCTL_STRING(_hw, HW_MACHINE_PLATFORM, platform, CTLFLAG_RD,
148 platform, 0, "Platform architecture");
149
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150static char machine_arch[] = MACHINE_ARCH;
151SYSCTL_STRING(_hw, HW_MACHINE_ARCH, machine_arch, CTLFLAG_RD,
0955fd91 152 machine_arch, 0, "Cpu architecture");
08efc527 153
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154char hostname[MAXHOSTNAMELEN];
155
156static int
157sysctl_hostname(SYSCTL_HANDLER_ARGS)
158{
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159 struct thread *td = req->td;
160 struct proc *p = td ? td->td_proc : NULL;
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161 int error;
162
41c20dac 163 if (p && p->p_ucred->cr_prison) {
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164 if (!jail_set_hostname_allowed && req->newptr)
165 return(EPERM);
166 error = sysctl_handle_string(oidp,
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167 p->p_ucred->cr_prison->pr_host,
168 sizeof p->p_ucred->cr_prison->pr_host, req);
169 } else {
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170 error = sysctl_handle_string(oidp,
171 hostname, sizeof hostname, req);
41c20dac 172 }
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173 return (error);
174}
175
176SYSCTL_PROC(_kern, KERN_HOSTNAME, hostname,
177 CTLTYPE_STRING|CTLFLAG_RW|CTLFLAG_PRISON,
178 0, 0, sysctl_hostname, "A", "Hostname");
179
180int securelevel = -1;
7e42c007 181int kernel_mem_readonly = 0;
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182
183static int
184sysctl_kern_securelvl(SYSCTL_HANDLER_ARGS)
185{
186 int error, level;
187
188 level = securelevel;
189 error = sysctl_handle_int(oidp, &level, 0, req);
190 if (error || !req->newptr)
191 return (error);
192 if (level < securelevel)
193 return (EPERM);
194 securelevel = level;
195 return (error);
196}
197
198SYSCTL_PROC(_kern, KERN_SECURELVL, securelevel, CTLTYPE_INT|CTLFLAG_RW,
199 0, 0, sysctl_kern_securelvl, "I", "Current secure level");
200
201char domainname[MAXHOSTNAMELEN];
202SYSCTL_STRING(_kern, KERN_NISDOMAINNAME, domainname, CTLFLAG_RW,
203 &domainname, sizeof(domainname), "Name of the current YP/NIS domain");
204
205unsigned long hostid;
206SYSCTL_ULONG(_kern, KERN_HOSTID, hostid, CTLFLAG_RW, &hostid, 0, "Host ID");
207
208/*
209 * This is really cheating. These actually live in the libc, something
210 * which I'm not quite sure is a good idea anyway, but in order for
211 * getnext and friends to actually work, we define dummies here.
212 */
213SYSCTL_STRING(_user, USER_CS_PATH, cs_path, CTLFLAG_RD,
214 "", 0, "PATH that finds all the standard utilities");
215SYSCTL_INT(_user, USER_BC_BASE_MAX, bc_base_max, CTLFLAG_RD,
216 0, 0, "Max ibase/obase values in bc(1)");
217SYSCTL_INT(_user, USER_BC_DIM_MAX, bc_dim_max, CTLFLAG_RD,
218 0, 0, "Max array size in bc(1)");
219SYSCTL_INT(_user, USER_BC_SCALE_MAX, bc_scale_max, CTLFLAG_RD,
220 0, 0, "Max scale value in bc(1)");
221SYSCTL_INT(_user, USER_BC_STRING_MAX, bc_string_max, CTLFLAG_RD,
222 0, 0, "Max string length in bc(1)");
223SYSCTL_INT(_user, USER_COLL_WEIGHTS_MAX, coll_weights_max, CTLFLAG_RD,
224 0, 0, "Maximum number of weights assigned to an LC_COLLATE locale entry");
225SYSCTL_INT(_user, USER_EXPR_NEST_MAX, expr_nest_max, CTLFLAG_RD, 0, 0, "");
226SYSCTL_INT(_user, USER_LINE_MAX, line_max, CTLFLAG_RD,
227 0, 0, "Max length (bytes) of a text-processing utility's input line");
228SYSCTL_INT(_user, USER_RE_DUP_MAX, re_dup_max, CTLFLAG_RD,
229 0, 0, "Maximum number of repeats of a regexp permitted");
230SYSCTL_INT(_user, USER_POSIX2_VERSION, posix2_version, CTLFLAG_RD,
231 0, 0,
232 "The version of POSIX 1003.2 with which the system attempts to comply");
233SYSCTL_INT(_user, USER_POSIX2_C_BIND, posix2_c_bind, CTLFLAG_RD,
234 0, 0, "Whether C development supports the C bindings option");
235SYSCTL_INT(_user, USER_POSIX2_C_DEV, posix2_c_dev, CTLFLAG_RD,
236 0, 0, "Whether system supports the C development utilities option");
237SYSCTL_INT(_user, USER_POSIX2_CHAR_TERM, posix2_char_term, CTLFLAG_RD,
238 0, 0, "");
239SYSCTL_INT(_user, USER_POSIX2_FORT_DEV, posix2_fort_dev, CTLFLAG_RD,
240 0, 0, "Whether system supports FORTRAN development utilities");
241SYSCTL_INT(_user, USER_POSIX2_FORT_RUN, posix2_fort_run, CTLFLAG_RD,
242 0, 0, "Whether system supports FORTRAN runtime utilities");
243SYSCTL_INT(_user, USER_POSIX2_LOCALEDEF, posix2_localedef, CTLFLAG_RD,
244 0, 0, "Whether system supports creation of locales");
245SYSCTL_INT(_user, USER_POSIX2_SW_DEV, posix2_sw_dev, CTLFLAG_RD,
246 0, 0, "Whether system supports software development utilities");
247SYSCTL_INT(_user, USER_POSIX2_UPE, posix2_upe, CTLFLAG_RD,
248 0, 0, "Whether system supports the user portability utilities");
249SYSCTL_INT(_user, USER_STREAM_MAX, stream_max, CTLFLAG_RD,
250 0, 0, "Min Maximum number of streams a process may have open at one time");
251SYSCTL_INT(_user, USER_TZNAME_MAX, tzname_max, CTLFLAG_RD,
252 0, 0, "Min Maximum number of types supported for timezone names");
253
254#include <sys/vnode.h>
255SYSCTL_INT(_debug_sizeof, OID_AUTO, vnode, CTLFLAG_RD,
256 0, sizeof(struct vnode), "sizeof(struct vnode)");
257
258SYSCTL_INT(_debug_sizeof, OID_AUTO, proc, CTLFLAG_RD,
259 0, sizeof(struct proc), "sizeof(struct proc)");
260
261#include <sys/conf.h>
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262SYSCTL_INT(_debug_sizeof, OID_AUTO, cdev, CTLFLAG_RD,
263 0, sizeof(struct cdev), "sizeof(struct cdev)");