proc->thread stage 4: rework the VFS and DEVICE subsystems to take thread
[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 $
dadab5e9 41 * $DragonFly: src/sys/kern/kern_mib.c,v 1.4 2003/06/25 03:55:57 dillon Exp $
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42 */
43
44#include <sys/param.h>
45#include <sys/kernel.h>
46#include <sys/systm.h>
47#include <sys/sysctl.h>
48#include <sys/proc.h>
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,
65 "Sizeof various things");
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)");
74
75SYSCTL_NODE(, OID_AUTO, compat, CTLFLAG_RW, 0,
76 "Compatibility code");
77
78SYSCTL_STRING(_kern, KERN_OSRELEASE, osrelease, CTLFLAG_RD,
79 osrelease, 0, "Operating system type");
80
81SYSCTL_INT(_kern, KERN_OSREV, osrevision, CTLFLAG_RD,
82 0, BSD, "Operating system revision");
83
84SYSCTL_STRING(_kern, KERN_VERSION, version, CTLFLAG_RD,
85 version, 0, "Kernel version");
86
87SYSCTL_STRING(_kern, KERN_OSTYPE, ostype, CTLFLAG_RD,
88 ostype, 0, "Operating system type");
89
90extern int osreldate;
91SYSCTL_INT(_kern, KERN_OSRELDATE, osreldate, CTLFLAG_RD,
92 &osreldate, 0, "Operating system release date");
93
94SYSCTL_INT(_kern, KERN_MAXPROC, maxproc, CTLFLAG_RD,
95 &maxproc, 0, "Maximum number of processes");
96
97SYSCTL_INT(_kern, KERN_MAXPROCPERUID, maxprocperuid, CTLFLAG_RW,
98 &maxprocperuid, 0, "Maximum processes allowed per userid");
99
100SYSCTL_INT(_kern, OID_AUTO, maxusers, CTLFLAG_RD,
101 &maxusers, 0, "Hint for kernel tuning");
102
103SYSCTL_INT(_kern, KERN_ARGMAX, argmax, CTLFLAG_RD,
104 0, ARG_MAX, "Maximum bytes of argument to execve(2)");
105
106SYSCTL_INT(_kern, KERN_POSIX1, posix1version, CTLFLAG_RD,
107 0, _KPOSIX_VERSION, "Version of POSIX attempting to comply to");
108
109SYSCTL_INT(_kern, KERN_NGROUPS, ngroups, CTLFLAG_RD,
110 0, NGROUPS_MAX, "Maximum number of groups a user can belong to");
111
112SYSCTL_INT(_kern, KERN_JOB_CONTROL, job_control, CTLFLAG_RD,
113 0, 1, "Whether job control is available");
114
115#ifdef _POSIX_SAVED_IDS
116SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD,
117 0, 1, "Whether saved set-group/user ID is available");
118#else
119SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD,
120 0, 0, "Whether saved set-group/user ID is available");
121#endif
122
123char kernelname[MAXPATHLEN] = "/kernel"; /* XXX bloat */
124
125SYSCTL_STRING(_kern, KERN_BOOTFILE, bootfile, CTLFLAG_RW,
126 kernelname, sizeof kernelname, "Name of kernel file booted");
127
128#ifdef SMP
129SYSCTL_INT(_hw, HW_NCPU, ncpu, CTLFLAG_RD,
130 &mp_ncpus, 0, "Number of active CPUs");
131#else
132SYSCTL_INT(_hw, HW_NCPU, ncpu, CTLFLAG_RD,
133 0, 1, "Number of active CPUs");
134#endif
135
136SYSCTL_INT(_hw, HW_BYTEORDER, byteorder, CTLFLAG_RD,
137 0, BYTE_ORDER, "System byte order");
138
139SYSCTL_INT(_hw, HW_PAGESIZE, pagesize, CTLFLAG_RD,
140 0, PAGE_SIZE, "System memory page size");
141
142static char machine_arch[] = MACHINE_ARCH;
143SYSCTL_STRING(_hw, HW_MACHINE_ARCH, machine_arch, CTLFLAG_RD,
144 machine_arch, 0, "System architecture");
145
146char hostname[MAXHOSTNAMELEN];
147
148static int
149sysctl_hostname(SYSCTL_HANDLER_ARGS)
150{
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151 struct thread *td = req->td;
152 struct proc *p = td ? td->td_proc : NULL;
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153 int error;
154
41c20dac 155 if (p && p->p_ucred->cr_prison) {
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156 if (!jail_set_hostname_allowed && req->newptr)
157 return(EPERM);
158 error = sysctl_handle_string(oidp,
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159 p->p_ucred->cr_prison->pr_host,
160 sizeof p->p_ucred->cr_prison->pr_host, req);
161 } else {
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162 error = sysctl_handle_string(oidp,
163 hostname, sizeof hostname, req);
41c20dac 164 }
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165 return (error);
166}
167
168SYSCTL_PROC(_kern, KERN_HOSTNAME, hostname,
169 CTLTYPE_STRING|CTLFLAG_RW|CTLFLAG_PRISON,
170 0, 0, sysctl_hostname, "A", "Hostname");
171
172int securelevel = -1;
173
174static int
175sysctl_kern_securelvl(SYSCTL_HANDLER_ARGS)
176{
177 int error, level;
178
179 level = securelevel;
180 error = sysctl_handle_int(oidp, &level, 0, req);
181 if (error || !req->newptr)
182 return (error);
183 if (level < securelevel)
184 return (EPERM);
185 securelevel = level;
186 return (error);
187}
188
189SYSCTL_PROC(_kern, KERN_SECURELVL, securelevel, CTLTYPE_INT|CTLFLAG_RW,
190 0, 0, sysctl_kern_securelvl, "I", "Current secure level");
191
192char domainname[MAXHOSTNAMELEN];
193SYSCTL_STRING(_kern, KERN_NISDOMAINNAME, domainname, CTLFLAG_RW,
194 &domainname, sizeof(domainname), "Name of the current YP/NIS domain");
195
196unsigned long hostid;
197SYSCTL_ULONG(_kern, KERN_HOSTID, hostid, CTLFLAG_RW, &hostid, 0, "Host ID");
198
199/*
200 * This is really cheating. These actually live in the libc, something
201 * which I'm not quite sure is a good idea anyway, but in order for
202 * getnext and friends to actually work, we define dummies here.
203 */
204SYSCTL_STRING(_user, USER_CS_PATH, cs_path, CTLFLAG_RD,
205 "", 0, "PATH that finds all the standard utilities");
206SYSCTL_INT(_user, USER_BC_BASE_MAX, bc_base_max, CTLFLAG_RD,
207 0, 0, "Max ibase/obase values in bc(1)");
208SYSCTL_INT(_user, USER_BC_DIM_MAX, bc_dim_max, CTLFLAG_RD,
209 0, 0, "Max array size in bc(1)");
210SYSCTL_INT(_user, USER_BC_SCALE_MAX, bc_scale_max, CTLFLAG_RD,
211 0, 0, "Max scale value in bc(1)");
212SYSCTL_INT(_user, USER_BC_STRING_MAX, bc_string_max, CTLFLAG_RD,
213 0, 0, "Max string length in bc(1)");
214SYSCTL_INT(_user, USER_COLL_WEIGHTS_MAX, coll_weights_max, CTLFLAG_RD,
215 0, 0, "Maximum number of weights assigned to an LC_COLLATE locale entry");
216SYSCTL_INT(_user, USER_EXPR_NEST_MAX, expr_nest_max, CTLFLAG_RD, 0, 0, "");
217SYSCTL_INT(_user, USER_LINE_MAX, line_max, CTLFLAG_RD,
218 0, 0, "Max length (bytes) of a text-processing utility's input line");
219SYSCTL_INT(_user, USER_RE_DUP_MAX, re_dup_max, CTLFLAG_RD,
220 0, 0, "Maximum number of repeats of a regexp permitted");
221SYSCTL_INT(_user, USER_POSIX2_VERSION, posix2_version, CTLFLAG_RD,
222 0, 0,
223 "The version of POSIX 1003.2 with which the system attempts to comply");
224SYSCTL_INT(_user, USER_POSIX2_C_BIND, posix2_c_bind, CTLFLAG_RD,
225 0, 0, "Whether C development supports the C bindings option");
226SYSCTL_INT(_user, USER_POSIX2_C_DEV, posix2_c_dev, CTLFLAG_RD,
227 0, 0, "Whether system supports the C development utilities option");
228SYSCTL_INT(_user, USER_POSIX2_CHAR_TERM, posix2_char_term, CTLFLAG_RD,
229 0, 0, "");
230SYSCTL_INT(_user, USER_POSIX2_FORT_DEV, posix2_fort_dev, CTLFLAG_RD,
231 0, 0, "Whether system supports FORTRAN development utilities");
232SYSCTL_INT(_user, USER_POSIX2_FORT_RUN, posix2_fort_run, CTLFLAG_RD,
233 0, 0, "Whether system supports FORTRAN runtime utilities");
234SYSCTL_INT(_user, USER_POSIX2_LOCALEDEF, posix2_localedef, CTLFLAG_RD,
235 0, 0, "Whether system supports creation of locales");
236SYSCTL_INT(_user, USER_POSIX2_SW_DEV, posix2_sw_dev, CTLFLAG_RD,
237 0, 0, "Whether system supports software development utilities");
238SYSCTL_INT(_user, USER_POSIX2_UPE, posix2_upe, CTLFLAG_RD,
239 0, 0, "Whether system supports the user portability utilities");
240SYSCTL_INT(_user, USER_STREAM_MAX, stream_max, CTLFLAG_RD,
241 0, 0, "Min Maximum number of streams a process may have open at one time");
242SYSCTL_INT(_user, USER_TZNAME_MAX, tzname_max, CTLFLAG_RD,
243 0, 0, "Min Maximum number of types supported for timezone names");
244
245#include <sys/vnode.h>
246SYSCTL_INT(_debug_sizeof, OID_AUTO, vnode, CTLFLAG_RD,
247 0, sizeof(struct vnode), "sizeof(struct vnode)");
248
249SYSCTL_INT(_debug_sizeof, OID_AUTO, proc, CTLFLAG_RD,
250 0, sizeof(struct proc), "sizeof(struct proc)");
251
252#include <sys/conf.h>
253SYSCTL_INT(_debug_sizeof, OID_AUTO, specinfo, CTLFLAG_RD,
254 0, sizeof(struct specinfo), "sizeof(struct specinfo)");