1 | /* $NetBSD: linux32_sysctl.c,v 1.16 2014/05/16 12:22:32 martin Exp $ */ |
2 | |
3 | /*- |
4 | * Copyright (c) 2006 Emmanuel Dreyfus, all rights reserved. |
5 | * |
6 | * Redistribution and use in source and binary forms, with or without |
7 | * modification, are permitted provided that the following conditions |
8 | * are met: |
9 | * 1. Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * 2. Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
14 | * 3. All advertising materials mentioning features or use of this software |
15 | * must display the following acknowledgement: |
16 | * This product includes software developed by Emmanuel Dreyfus |
17 | * 4. The name of the author may not be used to endorse or promote |
18 | * products derived from this software without specific prior written |
19 | * permission. |
20 | * |
21 | * THIS SOFTWARE IS PROVIDED BY THE THE AUTHOR AND CONTRIBUTORS ``AS IS'' |
22 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
23 | * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
24 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS |
25 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
26 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
27 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
28 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
29 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
30 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
31 | * POSSIBILITY OF SUCH DAMAGE. |
32 | */ |
33 | #include <sys/cdefs.h> |
34 | __KERNEL_RCSID(0, "$NetBSD: linux32_sysctl.c,v 1.16 2014/05/16 12:22:32 martin Exp $" ); |
35 | |
36 | #include <sys/param.h> |
37 | #include <sys/systm.h> |
38 | #include <sys/errno.h> |
39 | #include <sys/proc.h> |
40 | #include <sys/mount.h> |
41 | #include <sys/sysctl.h> |
42 | #include <sys/syscallargs.h> |
43 | #include <sys/ktrace.h> |
44 | |
45 | #include <compat/netbsd32/netbsd32.h> |
46 | |
47 | #include <compat/linux/common/linux_types.h> |
48 | #include <compat/linux/common/linux_signal.h> |
49 | #include <compat/linux/common/linux_sysctl.h> |
50 | #include <compat/linux/common/linux_ipc.h> |
51 | #include <compat/linux/common/linux_sem.h> |
52 | #include <compat/linux/linux_syscallargs.h> |
53 | |
54 | #include <compat/linux32/common/linux32_types.h> |
55 | #include <compat/linux32/common/linux32_signal.h> |
56 | #include <compat/linux32/common/linux32_sysctl.h> |
57 | #include <compat/linux32/linux32_syscallargs.h> |
58 | |
59 | char linux32_sysname[128] = "Linux" ; |
60 | char linux32_release[128] = "3.11.6" ; |
61 | char linux32_version[128] = "#1 SMP PREEMPT Thu Oct 24 16:23:02 UTC 2013" ; |
62 | |
63 | struct sysctlnode linux32_sysctl_root = { |
64 | .sysctl_flags = SYSCTL_VERSION| |
65 | CTLFLAG_ROOT|CTLTYPE_NODE|CTLFLAG_READWRITE, |
66 | .sysctl_num = 0, |
67 | .sysctl_name = "(linux32_root)" , |
68 | .sysctl_size = sizeof(struct sysctlnode), |
69 | }; |
70 | |
71 | static struct sysctllog *linux32_clog1; |
72 | static struct sysctllog *linux32_clog2; |
73 | |
74 | void |
75 | linux32_sysctl_fini(void) |
76 | { |
77 | |
78 | sysctl_teardown(&linux32_clog2); |
79 | sysctl_teardown(&linux32_clog1); |
80 | sysctl_free(&linux32_sysctl_root); |
81 | } |
82 | |
83 | void |
84 | linux32_sysctl_init(void) |
85 | { |
86 | const struct sysctlnode *node = &linux32_sysctl_root; |
87 | |
88 | sysctl_createv(&linux32_clog1, 0, NULL, NULL, |
89 | CTLFLAG_PERMANENT, |
90 | CTLTYPE_NODE, "linux32" , |
91 | SYSCTL_DESCR("Linux 32 bit emulation settings" ), |
92 | NULL, 0, NULL, 0, |
93 | CTL_EMUL, EMUL_LINUX32, CTL_EOL); |
94 | sysctl_createv(&linux32_clog1, 0, NULL, NULL, |
95 | CTLFLAG_PERMANENT, |
96 | CTLTYPE_NODE, "kern" , |
97 | SYSCTL_DESCR("Linux 32 bit kernel emulation settings" ), |
98 | NULL, 0, NULL, 0, |
99 | CTL_EMUL, EMUL_LINUX32, EMUL_LINUX32_KERN, CTL_EOL); |
100 | |
101 | sysctl_createv(&linux32_clog1, 0, NULL, NULL, |
102 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
103 | CTLTYPE_STRING, "ostype" , |
104 | SYSCTL_DESCR("Linux 32 bit operating system type" ), |
105 | NULL, 0, linux32_sysname, sizeof(linux32_sysname), |
106 | CTL_EMUL, EMUL_LINUX32, EMUL_LINUX32_KERN, |
107 | EMUL_LINUX32_KERN_OSTYPE, CTL_EOL); |
108 | sysctl_createv(&linux32_clog1, 0, NULL, NULL, |
109 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
110 | CTLTYPE_STRING, "osrelease" , |
111 | SYSCTL_DESCR("Linux 32 bit operating system release" ), |
112 | NULL, 0, linux32_release, sizeof(linux32_release), |
113 | CTL_EMUL, EMUL_LINUX32, EMUL_LINUX32_KERN, |
114 | EMUL_LINUX32_KERN_OSRELEASE, CTL_EOL); |
115 | sysctl_createv(&linux32_clog1, 0, NULL, NULL, |
116 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
117 | CTLTYPE_STRING, "osversion" , |
118 | SYSCTL_DESCR("Linux 32 bit operating system revision" ), |
119 | NULL, 0, linux32_version, sizeof(linux32_version), |
120 | CTL_EMUL, EMUL_LINUX32, EMUL_LINUX32_KERN, |
121 | EMUL_LINUX32_KERN_VERSION, CTL_EOL); |
122 | |
123 | sysctl_createv(&linux32_clog2, 0, &node, &node, |
124 | CTLFLAG_PERMANENT, |
125 | CTLTYPE_NODE, "kern" , NULL, |
126 | NULL, 0, NULL, 0, |
127 | LINUX_CTL_KERN, CTL_EOL); |
128 | |
129 | sysctl_createv(&linux32_clog2, 0, &node, NULL, |
130 | CTLFLAG_PERMANENT, |
131 | CTLTYPE_STRING, "ostype" , NULL, |
132 | NULL, 0, linux32_sysname, sizeof(linux32_sysname), |
133 | LINUX_KERN_OSTYPE, CTL_EOL); |
134 | sysctl_createv(&linux32_clog2, 0, &node, NULL, |
135 | CTLFLAG_PERMANENT, |
136 | CTLTYPE_STRING, "osrelease" , NULL, |
137 | NULL, 0, linux32_release, sizeof(linux32_release), |
138 | LINUX_KERN_OSRELEASE, CTL_EOL); |
139 | sysctl_createv(&linux32_clog2, 0, &node, NULL, |
140 | CTLFLAG_PERMANENT, |
141 | CTLTYPE_STRING, "version" , NULL, |
142 | NULL, 0, linux32_version, sizeof(linux32_version), |
143 | LINUX_KERN_VERSION, CTL_EOL); |
144 | |
145 | linux32_sysctl_root.sysctl_flags &= ~CTLFLAG_READWRITE; |
146 | } |
147 | |
148 | int |
149 | linux32_sys___sysctl(struct lwp *l, const struct linux32_sys___sysctl_args *uap, register_t *retval) |
150 | { |
151 | /* { |
152 | syscallarg(linux32___sysctlp_t) lsp; |
153 | } */ |
154 | struct linux32_sysctl ls32; |
155 | int name[CTL_MAXNAME]; |
156 | size_t savelen; |
157 | netbsd32_size_t oldlen32; |
158 | size_t oldlen; |
159 | int error; |
160 | |
161 | /* |
162 | * Read sysctl arguments |
163 | */ |
164 | if ((error = copyin(SCARG_P32(uap, lsp), &ls32, sizeof(ls32))) != 0) |
165 | return error; |
166 | |
167 | /* |
168 | * Read oldlen |
169 | */ |
170 | if (NETBSD32PTR64(ls32.oldlenp) != NULL) { |
171 | if ((error = copyin(NETBSD32PTR64(ls32.oldlenp), |
172 | &oldlen32, sizeof(oldlen32))) != 0) |
173 | return error; |
174 | } else { |
175 | oldlen32 = 0; |
176 | } |
177 | |
178 | savelen = (size_t)oldlen32; |
179 | |
180 | /* |
181 | * Sanity check nlen |
182 | */ |
183 | if ((ls32.nlen > CTL_MAXNAME) || (ls32.nlen < 1)) |
184 | return ENOTDIR; |
185 | |
186 | /* |
187 | * Read the sysctl name |
188 | */ |
189 | if ((error = copyin(NETBSD32PTR64(ls32.name), &name, |
190 | ls32.nlen * sizeof(int))) != 0) |
191 | return error; |
192 | |
193 | ktrmib(name, ls32.nlen); |
194 | /* |
195 | * First try linux32 tree, then linux tree |
196 | */ |
197 | oldlen = (size_t)oldlen32; |
198 | sysctl_lock(NETBSD32PTR64(ls32.newval) != NULL); |
199 | error = sysctl_dispatch(name, ls32.nlen, |
200 | NETBSD32PTR64(ls32.oldval), &oldlen, |
201 | NETBSD32PTR64(ls32.newval), ls32.newlen, |
202 | name, l, &linux32_sysctl_root); |
203 | oldlen32 = (netbsd32_size_t)oldlen; |
204 | sysctl_unlock(); |
205 | |
206 | /* |
207 | * Check for oldlen overflow (not likely, but who knows...) |
208 | */ |
209 | if (oldlen != oldlen32) { |
210 | #ifdef DEBUG_LINUX |
211 | printf("%s: oldlen32 = %d, oldlen = %ld\n" , |
212 | __func__, oldlen32, oldlen); |
213 | #endif |
214 | return EINVAL; |
215 | } |
216 | |
217 | /* |
218 | * set caller's oldlen, even if we got an error |
219 | */ |
220 | if (NETBSD32PTR64(ls32.oldlenp)) { |
221 | int nerror; |
222 | |
223 | nerror = copyout(&oldlen32, |
224 | NETBSD32PTR64(ls32.oldlenp), sizeof(oldlen32)); |
225 | |
226 | if (error == 0) |
227 | error = nerror; |
228 | } |
229 | |
230 | /* |
231 | * oldlen was too short |
232 | */ |
233 | if ((error == 0) && |
234 | (NETBSD32PTR64(ls32.oldval) != NULL) && |
235 | (savelen < oldlen32)) |
236 | error = ENOMEM; |
237 | |
238 | return error; |
239 | } |
240 | |