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 | |
66 | struct 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 | |
73 | static struct sysctllog *netbsd32_clog; |
74 | |
75 | /* |
76 | * sysctl helper routine for netbsd32's kern.boottime node |
77 | */ |
78 | static int |
79 | netbsd32_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 | */ |
94 | static int |
95 | netbsd32_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 | |
107 | void |
108 | netbsd32_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 | |
170 | void |
171 | netbsd32_sysctl_fini(void) |
172 | { |
173 | |
174 | sysctl_teardown(&netbsd32_clog); |
175 | sysctl_free(&netbsd32_sysctl_root); |
176 | } |
177 | |
178 | int |
179 | netbsd32___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 | |