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: head/sys/kern/kern_mib.c 86183 2001-11-08 02:13:18Z rwatson $
41 */
42
43#include "opt_global.h"
44
45#include <sys/param.h>
46#include <sys/kernel.h>
47#include <sys/systm.h>
48#include <sys/sysctl.h>
49#include <sys/proc.h>
50#include <sys/jail.h>
51#include <sys/smp.h>
52
53SYSCTL_NODE(, 0, sysctl, CTLFLAG_RW, 0,
54 "Sysctl internal magic");
55SYSCTL_NODE(, CTL_KERN, kern, CTLFLAG_RW, 0,
56 "High kernel, proc, limits &c");
57SYSCTL_NODE(, CTL_VM, vm, CTLFLAG_RW, 0,
58 "Virtual memory");
59SYSCTL_NODE(, CTL_VFS, vfs, CTLFLAG_RW, 0,
60 "File system");
61SYSCTL_NODE(, CTL_NET, net, CTLFLAG_RW, 0,
62 "Network, (see socket.h)");
63SYSCTL_NODE(, CTL_DEBUG, debug, CTLFLAG_RW, 0,
64 "Debugging");
65SYSCTL_NODE(_debug, OID_AUTO, sizeof, CTLFLAG_RW, 0,
66 "Sizeof various things");
67SYSCTL_NODE(, CTL_HW, hw, CTLFLAG_RW, 0,
68 "hardware");
69SYSCTL_NODE(, CTL_MACHDEP, machdep, CTLFLAG_RW, 0,
70 "machine dependent");
71SYSCTL_NODE(, CTL_USER, user, CTLFLAG_RW, 0,
72 "user-level");
73SYSCTL_NODE(, CTL_P1003_1B, p1003_1b, CTLFLAG_RW, 0,
74 "p1003_1b, (see p1003_1b.h)");
75
76SYSCTL_NODE(, OID_AUTO, compat, CTLFLAG_RW, 0,
77 "Compatibility code");
78
79SYSCTL_STRING(_kern, KERN_OSRELEASE, osrelease, CTLFLAG_RD,
80 osrelease, 0, "Operating system type");
81
82SYSCTL_INT(_kern, KERN_OSREV, osrevision, CTLFLAG_RD,
83 0, BSD, "Operating system revision");
84
85SYSCTL_STRING(_kern, KERN_VERSION, version, CTLFLAG_RD,
86 version, 0, "Kernel version");
87
88SYSCTL_STRING(_kern, KERN_OSTYPE, ostype, CTLFLAG_RD,
89 ostype, 0, "Operating system type");
90
91extern int osreldate;
92SYSCTL_INT(_kern, KERN_OSRELDATE, osreldate, CTLFLAG_RD,
93 &osreldate, 0, "Operating system release date");
94
95SYSCTL_INT(_kern, KERN_MAXPROC, maxproc, CTLFLAG_RD,
96 &maxproc, 0, "Maximum number of processes");
97
98SYSCTL_INT(_kern, KERN_MAXPROCPERUID, maxprocperuid, CTLFLAG_RW,
99 &maxprocperuid, 0, "Maximum processes allowed per userid");
100
101SYSCTL_INT(_kern, OID_AUTO, maxusers, CTLFLAG_RD,
102 &maxusers, 0, "Hint for kernel tuning");
103
104SYSCTL_INT(_kern, KERN_ARGMAX, argmax, CTLFLAG_RD,
105 0, ARG_MAX, "Maximum bytes of argument to execve(2)");
106
107SYSCTL_INT(_kern, KERN_POSIX1, posix1version, CTLFLAG_RD,
108 0, _KPOSIX_VERSION, "Version of POSIX attempting to comply to");
109
110SYSCTL_INT(_kern, KERN_NGROUPS, ngroups, CTLFLAG_RD,
111 0, NGROUPS_MAX, "Maximum number of groups a user can belong to");
112
113SYSCTL_INT(_kern, KERN_JOB_CONTROL, job_control, CTLFLAG_RD,
114 0, 1, "Whether job control is available");
115
116#ifdef _POSIX_SAVED_IDS
117SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD,
118 0, 1, "Whether saved set-group/user ID is available");
119#else
120SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD,
121 0, 0, "Whether saved set-group/user ID is available");
122#endif
123
124char kernelname[MAXPATHLEN] = "/kernel"; /* XXX bloat */
125
126SYSCTL_STRING(_kern, KERN_BOOTFILE, bootfile, CTLFLAG_RW,
127 kernelname, sizeof kernelname, "Name of kernel file booted");
128
129#ifdef SMP
130SYSCTL_INT(_hw, HW_NCPU, ncpu, CTLFLAG_RD,
131 &mp_ncpus, 0, "Number of active CPUs");
132#else
133SYSCTL_INT(_hw, HW_NCPU, ncpu, CTLFLAG_RD,
134 0, 1, "Number of active CPUs");
135#endif
136
137SYSCTL_INT(_hw, HW_BYTEORDER, byteorder, CTLFLAG_RD,
138 0, BYTE_ORDER, "System byte order");
139
140SYSCTL_INT(_hw, HW_PAGESIZE, pagesize, CTLFLAG_RD,
141 0, PAGE_SIZE, "System memory page size");
142
143static char machine_arch[] = MACHINE_ARCH;
144SYSCTL_STRING(_hw, HW_MACHINE_ARCH, machine_arch, CTLFLAG_RD,
145 machine_arch, 0, "System architecture");
146
147#ifdef REGRESSION
148SYSCTL_NODE(, OID_AUTO, regression, CTLFLAG_RW, 0, "Regression test MIB");
149#endif /* !REGRESSION */
150
151char hostname[MAXHOSTNAMELEN];
152
153static int
154sysctl_hostname(SYSCTL_HANDLER_ARGS)
155{
156 int error;
157
158 if (jailed(req->td->td_proc->p_ucred)) {
159 if (!jail_set_hostname_allowed && req->newptr)
160 return(EPERM);
161 error = sysctl_handle_string(oidp,
162 req->td->td_proc->p_ucred->cr_prison->pr_host,
163 sizeof req->td->td_proc->p_ucred->cr_prison->pr_host, req);
164 } else
165 error = sysctl_handle_string(oidp,
166 hostname, sizeof hostname, req);
167 return (error);
168}
169
170SYSCTL_PROC(_kern, KERN_HOSTNAME, hostname,
171 CTLTYPE_STRING|CTLFLAG_RW|CTLFLAG_PRISON,
172 0, 0, sysctl_hostname, "A", "Hostname");
173
174#ifdef REGRESSION
175int regression_securelevel_nonmonotonic=0;
176
177SYSCTL_INT(_regression, OID_AUTO, securelevel_nonmonotonic, CTLFLAG_RW,
178 &regression_securelevel_nonmonotonic, 0, "securelevel may be lowered");
179#endif /* !REGRESSION */
180
181int securelevel = -1;
182
183static int
184sysctl_kern_securelvl(SYSCTL_HANDLER_ARGS)
185{
186 struct prison *pr;
187 int error, level;
188
189 pr = req->td->td_proc->p_ucred->cr_prison;
190
191 /*
192 * If the process is in jail, return the maximum of the global and
193 * local levels; otherwise, return the global level.
194 */
195 if (pr != NULL)
196 level = imax(securelevel, pr->pr_securelevel);
197 else
198 level = securelevel;
199 error = sysctl_handle_int(oidp, &level, 0, req);
200 if (error || !req->newptr)
201 return (error);
202 /*
203 * Permit update only if the new securelevel exceeds the
204 * global level, and local level if any.
205 */
206 if (pr != NULL) {
207#ifdef REGRESSION
208 if (!regression_securelevel_nonmonotonic)
209#endif /* !REGRESSION */
210 if (level < imax(securelevel, pr->pr_securelevel))
211 return (EPERM);
212 pr->pr_securelevel = level;
213 } else {
214#ifdef REGRESSION
215 if (!regression_securelevel_nonmonotonic)
216#endif /* !REGRESSION */
217 if (level < securelevel)
218 return (EPERM);
219 securelevel = level;
220 }
221 return (error);
222}
223
224SYSCTL_PROC(_kern, KERN_SECURELVL, securelevel,
225 CTLTYPE_INT|CTLFLAG_RW|CTLFLAG_PRISON, 0, 0, sysctl_kern_securelvl,
226 "I", "Current secure level");
227
228char domainname[MAXHOSTNAMELEN];
229SYSCTL_STRING(_kern, KERN_NISDOMAINNAME, domainname, CTLFLAG_RW,
230 &domainname, sizeof(domainname), "Name of the current YP/NIS domain");
231
232unsigned long hostid;
233SYSCTL_ULONG(_kern, KERN_HOSTID, hostid, CTLFLAG_RW, &hostid, 0, "Host ID");
234
235/*
236 * This is really cheating. These actually live in the libc, something
237 * which I'm not quite sure is a good idea anyway, but in order for
238 * getnext and friends to actually work, we define dummies here.
239 */
240SYSCTL_STRING(_user, USER_CS_PATH, cs_path, CTLFLAG_RD,
241 "", 0, "PATH that finds all the standard utilities");
242SYSCTL_INT(_user, USER_BC_BASE_MAX, bc_base_max, CTLFLAG_RD,
243 0, 0, "Max ibase/obase values in bc(1)");
244SYSCTL_INT(_user, USER_BC_DIM_MAX, bc_dim_max, CTLFLAG_RD,
245 0, 0, "Max array size in bc(1)");
246SYSCTL_INT(_user, USER_BC_SCALE_MAX, bc_scale_max, CTLFLAG_RD,
247 0, 0, "Max scale value in bc(1)");
248SYSCTL_INT(_user, USER_BC_STRING_MAX, bc_string_max, CTLFLAG_RD,
249 0, 0, "Max string length in bc(1)");
250SYSCTL_INT(_user, USER_COLL_WEIGHTS_MAX, coll_weights_max, CTLFLAG_RD,
251 0, 0, "Maximum number of weights assigned to an LC_COLLATE locale entry");
252SYSCTL_INT(_user, USER_EXPR_NEST_MAX, expr_nest_max, CTLFLAG_RD, 0, 0, "");
253SYSCTL_INT(_user, USER_LINE_MAX, line_max, CTLFLAG_RD,
254 0, 0, "Max length (bytes) of a text-processing utility's input line");
255SYSCTL_INT(_user, USER_RE_DUP_MAX, re_dup_max, CTLFLAG_RD,
256 0, 0, "Maximum number of repeats of a regexp permitted");
257SYSCTL_INT(_user, USER_POSIX2_VERSION, posix2_version, CTLFLAG_RD,
258 0, 0,
259 "The version of POSIX 1003.2 with which the system attempts to comply");
260SYSCTL_INT(_user, USER_POSIX2_C_BIND, posix2_c_bind, CTLFLAG_RD,
261 0, 0, "Whether C development supports the C bindings option");
262SYSCTL_INT(_user, USER_POSIX2_C_DEV, posix2_c_dev, CTLFLAG_RD,
263 0, 0, "Whether system supports the C development utilities option");
264SYSCTL_INT(_user, USER_POSIX2_CHAR_TERM, posix2_char_term, CTLFLAG_RD,
265 0, 0, "");
266SYSCTL_INT(_user, USER_POSIX2_FORT_DEV, posix2_fort_dev, CTLFLAG_RD,
267 0, 0, "Whether system supports FORTRAN development utilities");
268SYSCTL_INT(_user, USER_POSIX2_FORT_RUN, posix2_fort_run, CTLFLAG_RD,
269 0, 0, "Whether system supports FORTRAN runtime utilities");
270SYSCTL_INT(_user, USER_POSIX2_LOCALEDEF, posix2_localedef, CTLFLAG_RD,
271 0, 0, "Whether system supports creation of locales");
272SYSCTL_INT(_user, USER_POSIX2_SW_DEV, posix2_sw_dev, CTLFLAG_RD,
273 0, 0, "Whether system supports software development utilities");
274SYSCTL_INT(_user, USER_POSIX2_UPE, posix2_upe, CTLFLAG_RD,
275 0, 0, "Whether system supports the user portability utilities");
276SYSCTL_INT(_user, USER_STREAM_MAX, stream_max, CTLFLAG_RD,
277 0, 0, "Min Maximum number of streams a process may have open at one time");
278SYSCTL_INT(_user, USER_TZNAME_MAX, tzname_max, CTLFLAG_RD,
279 0, 0, "Min Maximum number of types supported for timezone names");
280
281#include <sys/vnode.h>
282SYSCTL_INT(_debug_sizeof, OID_AUTO, vnode, CTLFLAG_RD,
283 0, sizeof(struct vnode), "sizeof(struct vnode)");
284
285SYSCTL_INT(_debug_sizeof, OID_AUTO, proc, CTLFLAG_RD,
286 0, sizeof(struct proc), "sizeof(struct proc)");
287
288#include <sys/conf.h>
289SYSCTL_INT(_debug_sizeof, OID_AUTO, specinfo, CTLFLAG_RD,
290 0, sizeof(struct specinfo), "sizeof(struct specinfo)");
291
292#include <sys/bio.h>
293#include <sys/buf.h>
294SYSCTL_INT(_debug_sizeof, OID_AUTO, bio, CTLFLAG_RD,
295 0, sizeof(struct bio), "sizeof(struct bio)");
296SYSCTL_INT(_debug_sizeof, OID_AUTO, buf, CTLFLAG_RD,
297 0, sizeof(struct buf), "sizeof(struct buf)");
298
299#include <sys/user.h>
300SYSCTL_INT(_debug_sizeof, OID_AUTO, kinfo_proc, CTLFLAG_RD,
301 0, sizeof(struct kinfo_proc), "sizeof(struct kinfo_proc)");