1/* $NetBSD: netbsd32_sysctl.c,v 1.36 2015/05/17 18:52:37 matt Exp $ */
2
3/*
4 * Copyright (c) 2003 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Andrew Brown.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. The name of the author may not be used to endorse or promote products
19 * derived from this software without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
27 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#include <sys/cdefs.h>
35__KERNEL_RCSID(0, "$NetBSD: netbsd32_sysctl.c,v 1.36 2015/05/17 18:52:37 matt Exp $");
36
37#if defined(_KERNEL_OPT)
38#include "opt_ddb.h"
39#endif
40
41#include <sys/param.h>
42#include <sys/systm.h>
43#include <sys/kernel.h>
44#include <sys/mount.h>
45#include <sys/stat.h>
46#include <sys/time.h>
47#include <sys/vnode.h>
48#include <sys/syscallargs.h>
49#include <sys/proc.h>
50#include <sys/sysctl.h>
51#include <sys/dirent.h>
52#include <sys/ktrace.h>
53
54#include <uvm/uvm_extern.h>
55
56#include <compat/netbsd32/netbsd32.h>
57#include <compat/netbsd32/netbsd32_syscall.h>
58#include <compat/netbsd32/netbsd32_syscallargs.h>
59#include <compat/netbsd32/netbsd32_conv.h>
60#include <compat/netbsd32/netbsd32_sysctl.h>
61
62#if defined(DDB)
63#include <ddb/ddbvar.h>
64#endif
65
66struct sysctlnode netbsd32_sysctl_root = {
67 .sysctl_flags = SYSCTL_VERSION|CTLFLAG_ROOT|CTLTYPE_NODE,
68 .sysctl_num = 0,
69 .sysctl_name = "(netbsd32_root)",
70 .sysctl_size = sizeof(struct sysctlnode),
71};
72
73static struct sysctllog *netbsd32_clog;
74
75/*
76 * sysctl helper routine for netbsd32's kern.boottime node
77 */
78static int
79netbsd32_sysctl_kern_boottime(SYSCTLFN_ARGS)
80{
81 struct sysctlnode node;
82 struct netbsd32_timespec bt32;
83
84 netbsd32_from_timespec(&boottime, &bt32);
85
86 node = *rnode;
87 node.sysctl_data = &bt32;
88 return (sysctl_lookup(SYSCTLFN_CALL(&node)));
89}
90
91/*
92 * sysctl helper routine for netbsd32's vm.loadavg node
93 */
94static int
95netbsd32_sysctl_vm_loadavg(SYSCTLFN_ARGS)
96{
97 struct sysctlnode node;
98 struct netbsd32_loadavg av32;
99
100 netbsd32_from_loadavg(&av32, &averunnable);
101
102 node = *rnode;
103 node.sysctl_data = &av32;
104 return (sysctl_lookup(SYSCTLFN_CALL(&node)));
105}
106
107void
108netbsd32_sysctl_init(void)
109{
110 const struct sysctlnode *_root = &netbsd32_sysctl_root;
111#ifndef __mips__
112 extern const char machine_arch32[];
113#endif
114 extern const char machine32[];
115
116 sysctl_createv(&netbsd32_clog, 0, &_root, NULL,
117 CTLFLAG_PERMANENT,
118 CTLTYPE_NODE, "kern", NULL,
119 NULL, 0, NULL, 0,
120 CTL_KERN, CTL_EOL);
121 sysctl_createv(&netbsd32_clog, 0, &_root, NULL,
122 CTLFLAG_PERMANENT,
123 CTLTYPE_STRUCT, "boottime", NULL,
124 netbsd32_sysctl_kern_boottime, 0, NULL,
125 sizeof(struct netbsd32_timeval),
126 CTL_KERN, KERN_BOOTTIME, CTL_EOL);
127
128 sysctl_createv(&netbsd32_clog, 0, &_root, NULL,
129 CTLFLAG_PERMANENT,
130 CTLTYPE_NODE, "vm", NULL,
131 NULL, 0, NULL, 0,
132 CTL_VM, CTL_EOL);
133 sysctl_createv(&netbsd32_clog, 0, &_root, NULL,
134 CTLFLAG_PERMANENT,
135 CTLTYPE_STRUCT, "loadavg", NULL,
136 netbsd32_sysctl_vm_loadavg, 0, NULL,
137 sizeof(struct netbsd32_loadavg),
138 CTL_VM, VM_LOADAVG, CTL_EOL);
139
140 sysctl_createv(&netbsd32_clog, 0, &_root, NULL,
141 CTLFLAG_PERMANENT,
142 CTLTYPE_NODE, "hw", NULL,
143 NULL, 0, NULL, 0,
144 CTL_HW, CTL_EOL);
145 sysctl_createv(&netbsd32_clog, 0, &_root, NULL,
146 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE,
147 CTLTYPE_INT, "alignbytes", NULL,
148 NULL, ALIGNBYTES32, NULL, 0,
149 CTL_HW, HW_ALIGNBYTES, CTL_EOL);
150 sysctl_createv(&netbsd32_clog, 0, &_root, NULL,
151 CTLFLAG_PERMANENT,
152 CTLTYPE_STRING, "machine", NULL,
153 NULL, 0, __UNCONST(&machine32), 0,
154 CTL_HW, HW_MACHINE, CTL_EOL);
155#ifdef __mips__
156 sysctl_createv(&netbsd32_clog, 0, &_root, NULL,
157 CTLFLAG_PERMANENT,
158 CTLTYPE_STRING, "machine_arch", NULL,
159 cpu_machinearch32, 0, NULL, 0,
160 CTL_HW, HW_MACHINE_ARCH, CTL_EOL);
161#else
162 sysctl_createv(&netbsd32_clog, 0, &_root, NULL,
163 CTLFLAG_PERMANENT,
164 CTLTYPE_STRING, "machine_arch", NULL,
165 NULL, 0, __UNCONST(&machine_arch32), 0,
166 CTL_HW, HW_MACHINE_ARCH, CTL_EOL);
167#endif
168}
169
170void
171netbsd32_sysctl_fini(void)
172{
173
174 sysctl_teardown(&netbsd32_clog);
175 sysctl_free(&netbsd32_sysctl_root);
176}
177
178int
179netbsd32___sysctl(struct lwp *l, const struct netbsd32___sysctl_args *uap, register_t *retval)
180{
181 /* {
182 syscallarg(netbsd32_intp) name;
183 syscallarg(u_int) namelen;
184 syscallarg(netbsd32_voidp) old;
185 syscallarg(netbsd32_size_tp) oldlenp;
186 syscallarg(netbsd32_voidp) new;
187 syscallarg(netbsd32_size_t) newlen;
188 } */
189 const struct sysctlnode *pnode;
190 netbsd32_size_t netbsd32_oldlen;
191 size_t oldlen, *oldlenp, savelen;
192 int name[CTL_MAXNAME], error, nerror, *namep;
193 void *newp, *oldp;
194
195 /*
196 * get and convert 32 bit size_t to native size_t
197 */
198 namep = SCARG_P32(uap, name);
199 oldp = SCARG_P32(uap, oldv);
200 newp = SCARG_P32(uap, newv);
201 oldlenp = SCARG_P32(uap, oldlenp);
202 oldlen = 0;
203 if (oldlenp != NULL) {
204 error = copyin(oldlenp, &netbsd32_oldlen,
205 sizeof(netbsd32_oldlen));
206 if (error)
207 return (error);
208 oldlen = netbsd32_oldlen;
209 }
210 savelen = oldlen;
211
212 /*
213 * retrieve name and see if we need to dispatch this query to
214 * the shadow tree. if we find it in the shadow tree,
215 * dispatch to there, otherwise NULL means use the built-in
216 * default main tree.
217 */
218 if (SCARG(uap, namelen) > CTL_MAXNAME || SCARG(uap, namelen) < 1)
219 return (EINVAL);
220 error = copyin(namep, &name[0], SCARG(uap, namelen) * sizeof(int));
221 if (error)
222 return (error);
223
224 ktrmib(name, SCARG(uap, namelen));
225
226 sysctl_lock(newp != NULL);
227 pnode = &netbsd32_sysctl_root;
228 error = sysctl_locate(l, &name[0], SCARG(uap, namelen), &pnode, NULL);
229 pnode = (error == 0) ? &netbsd32_sysctl_root : NULL;
230 error = sysctl_dispatch(&name[0], SCARG(uap, namelen),
231 oldp, &oldlen,
232 newp, SCARG(uap, newlen),
233 &name[0], l, pnode);
234 sysctl_unlock();
235
236 /*
237 * reset caller's oldlen, even if we got an error
238 */
239 if (oldlenp) {
240 netbsd32_oldlen = oldlen;
241 nerror = copyout(&netbsd32_oldlen, oldlenp,
242 sizeof(netbsd32_oldlen));
243 if (error == 0)
244 error = nerror;
245 }
246
247 /*
248 * if the only problem is that we weren't given enough space,
249 * that's an ENOMEM error
250 */
251 if (error == 0 && oldp != NULL && savelen < oldlen)
252 error = ENOMEM;
253
254 return (error);
255}
256