1/* $NetBSD: openfirmio.c,v 1.4 2002/09/06 13:23:19 gehenna Exp $ */
2
3#include <sys/cdefs.h>
| 1/* $NetBSD: openfirmio.c,v 1.4 2002/09/06 13:23:19 gehenna Exp $ */
2
3#include <sys/cdefs.h>
|
4__FBSDID("$FreeBSD: head/sys/dev/ofw/openfirmio.c 128019 2004-04-07 20:46:16Z imp $");
| 4__FBSDID("$FreeBSD: head/sys/dev/ofw/openfirmio.c 129587 2004-05-22 16:43:42Z marius $");
|
5
6/*
7 * Copyright (c) 1992, 1993
8 * The Regents of the University of California. All rights reserved.
9 *
10 * This software was developed by the Computer Systems Engineering group
11 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
12 * contributed to Berkeley.
13 *
14 * All advertising materials mentioning features or use of this software
15 * must display the following acknowledgement:
16 * This product includes software developed by the University of
17 * California, Lawrence Berkeley Laboratory.
18 *
19 * Redistribution and use in source and binary forms, with or without
20 * modification, are permitted provided that the following conditions
21 * are met:
22 * 1. Redistributions of source code must retain the above copyright
23 * notice, this list of conditions and the following disclaimer.
24 * 2. Redistributions in binary form must reproduce the above copyright
25 * notice, this list of conditions and the following disclaimer in the
26 * documentation and/or other materials provided with the distribution.
27 * 4. Neither the name of the University nor the names of its contributors
28 * may be used to endorse or promote products derived from this software
29 * without specific prior written permission.
30 *
31 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
32 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
33 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
34 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
35 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
39 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
40 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
41 * SUCH DAMAGE.
42 *
43 * @(#)openfirm.c 8.1 (Berkeley) 6/11/93
44 *
45 */
46
47#include <sys/param.h>
48#include <sys/systm.h>
49#include <sys/conf.h>
50#include <sys/errno.h>
51#include <sys/fcntl.h>
52#include <sys/ioccom.h>
53#include <sys/kernel.h>
54#include <sys/malloc.h>
55#include <sys/module.h>
56
57#include <dev/ofw/openfirmio.h>
58
59static dev_t openfirm_dev;
60
61static d_ioctl_t openfirm_ioctl;
62
63#define OPENFIRM_MINOR 0
64
65static struct cdevsw openfirm_cdevsw = {
66 .d_version = D_VERSION,
67 .d_flags = D_NEEDGIANT,
68 .d_ioctl = openfirm_ioctl,
69 .d_name = "openfirm",
70};
71
72static phandle_t lastnode; /* speed hack */
73
74static int openfirm_checkid(phandle_t, phandle_t);
75static int openfirm_getstr(int, const char *, char **);
76
| 5
6/*
7 * Copyright (c) 1992, 1993
8 * The Regents of the University of California. All rights reserved.
9 *
10 * This software was developed by the Computer Systems Engineering group
11 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
12 * contributed to Berkeley.
13 *
14 * All advertising materials mentioning features or use of this software
15 * must display the following acknowledgement:
16 * This product includes software developed by the University of
17 * California, Lawrence Berkeley Laboratory.
18 *
19 * Redistribution and use in source and binary forms, with or without
20 * modification, are permitted provided that the following conditions
21 * are met:
22 * 1. Redistributions of source code must retain the above copyright
23 * notice, this list of conditions and the following disclaimer.
24 * 2. Redistributions in binary form must reproduce the above copyright
25 * notice, this list of conditions and the following disclaimer in the
26 * documentation and/or other materials provided with the distribution.
27 * 4. Neither the name of the University nor the names of its contributors
28 * may be used to endorse or promote products derived from this software
29 * without specific prior written permission.
30 *
31 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
32 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
33 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
34 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
35 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
39 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
40 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
41 * SUCH DAMAGE.
42 *
43 * @(#)openfirm.c 8.1 (Berkeley) 6/11/93
44 *
45 */
46
47#include <sys/param.h>
48#include <sys/systm.h>
49#include <sys/conf.h>
50#include <sys/errno.h>
51#include <sys/fcntl.h>
52#include <sys/ioccom.h>
53#include <sys/kernel.h>
54#include <sys/malloc.h>
55#include <sys/module.h>
56
57#include <dev/ofw/openfirmio.h>
58
59static dev_t openfirm_dev;
60
61static d_ioctl_t openfirm_ioctl;
62
63#define OPENFIRM_MINOR 0
64
65static struct cdevsw openfirm_cdevsw = {
66 .d_version = D_VERSION,
67 .d_flags = D_NEEDGIANT,
68 .d_ioctl = openfirm_ioctl,
69 .d_name = "openfirm",
70};
71
72static phandle_t lastnode; /* speed hack */
73
74static int openfirm_checkid(phandle_t, phandle_t);
75static int openfirm_getstr(int, const char *, char **);
76
|
77/* Maximum accepted name length. */
78#define OFW_NAME_MAX 8191
79
| |
80/*
81 * Verify target ID is valid (exists in the OPENPROM tree), as
82 * listed from node ID sid forward.
83 */
84static int
85openfirm_checkid(phandle_t sid, phandle_t tid)
86{
87
88 for (; sid != 0; sid = OF_peer(sid))
89 if (sid == tid || openfirm_checkid(OF_child(sid), tid))
90 return (1);
91
92 return (0);
93}
94
95static int
96openfirm_getstr(int len, const char *user, char **cpp)
97{
98 int error;
99 char *cp;
100
101 /* Reject obvious bogus requests */
| 77/*
78 * Verify target ID is valid (exists in the OPENPROM tree), as
79 * listed from node ID sid forward.
80 */
81static int
82openfirm_checkid(phandle_t sid, phandle_t tid)
83{
84
85 for (; sid != 0; sid = OF_peer(sid))
86 if (sid == tid || openfirm_checkid(OF_child(sid), tid))
87 return (1);
88
89 return (0);
90}
91
92static int
93openfirm_getstr(int len, const char *user, char **cpp)
94{
95 int error;
96 char *cp;
97
98 /* Reject obvious bogus requests */
|
102 if ((u_int)len > OFW_NAME_MAX)
| 99 if ((u_int)len > OFIOCMAXNAME)
|
103 return (ENAMETOOLONG);
104
105 *cpp = cp = malloc(len + 1, M_TEMP, M_WAITOK);
106 if (cp == NULL)
107 return (ENOMEM);
108 error = copyin(user, cp, len);
109 cp[len] = '\0';
110 return (error);
111}
112
113int
114openfirm_ioctl(dev_t dev, u_long cmd, caddr_t data, int flags,
115 struct thread *td)
116{
117 struct ofiocdesc *of;
118 phandle_t node;
119 int len, ok, error;
120 char *name, *value;
121 char newname[32];
122
123 if ((flags & FREAD) == 0)
124 return (EBADF);
125
126 of = (struct ofiocdesc *)data;
127 switch (cmd) {
128 case OFIOCGETOPTNODE:
129 *(phandle_t *) data = OF_finddevice("/options");
130 return (0);
131 case OFIOCGET:
| 100 return (ENAMETOOLONG);
101
102 *cpp = cp = malloc(len + 1, M_TEMP, M_WAITOK);
103 if (cp == NULL)
104 return (ENOMEM);
105 error = copyin(user, cp, len);
106 cp[len] = '\0';
107 return (error);
108}
109
110int
111openfirm_ioctl(dev_t dev, u_long cmd, caddr_t data, int flags,
112 struct thread *td)
113{
114 struct ofiocdesc *of;
115 phandle_t node;
116 int len, ok, error;
117 char *name, *value;
118 char newname[32];
119
120 if ((flags & FREAD) == 0)
121 return (EBADF);
122
123 of = (struct ofiocdesc *)data;
124 switch (cmd) {
125 case OFIOCGETOPTNODE:
126 *(phandle_t *) data = OF_finddevice("/options");
127 return (0);
128 case OFIOCGET:
|
132#if 0
| |
133 case OFIOCSET:
| 129 case OFIOCSET:
|
134#endif
| |
135 case OFIOCNEXTPROP:
136 case OFIOCFINDDEVICE:
137 case OFIOCGETPROPLEN:
138 node = of->of_nodeid;
139 break;
140 case OFIOCGETNEXT:
141 case OFIOCGETCHILD:
142 node = *(phandle_t *)data;
143 break;
144 default:
145 return (ENOIOCTL);
146 }
147
148 if (node != 0 && node != lastnode) {
149 /* Not an easy one, must search for it */
150 ok = openfirm_checkid(OF_peer(0), node);
151 if (!ok)
152 return (EINVAL);
153 lastnode = node;
154 }
155
156 name = value = NULL;
157 error = 0;
158 switch (cmd) {
159
160 case OFIOCGET:
161 case OFIOCGETPROPLEN:
162 if (node == 0)
163 return (EINVAL);
164 error = openfirm_getstr(of->of_namelen, of->of_name, &name);
165 if (error)
166 break;
167 len = OF_getproplen(node, name);
168 if (cmd == OFIOCGETPROPLEN) {
169 of->of_buflen = len;
170 break;
171 }
172 if (len > of->of_buflen) {
173 error = ENOMEM;
174 break;
175 }
176 of->of_buflen = len;
177 /* -1 means no entry; 0 means no value */
178 if (len <= 0)
179 break;
180 value = malloc(len, M_TEMP, M_WAITOK);
181 if (value == NULL) {
182 error = ENOMEM;
183 break;
184 }
185 len = OF_getprop(node, name, (void *)value, len);
186 error = copyout(value, of->of_buf, len);
187 break;
188
| 130 case OFIOCNEXTPROP:
131 case OFIOCFINDDEVICE:
132 case OFIOCGETPROPLEN:
133 node = of->of_nodeid;
134 break;
135 case OFIOCGETNEXT:
136 case OFIOCGETCHILD:
137 node = *(phandle_t *)data;
138 break;
139 default:
140 return (ENOIOCTL);
141 }
142
143 if (node != 0 && node != lastnode) {
144 /* Not an easy one, must search for it */
145 ok = openfirm_checkid(OF_peer(0), node);
146 if (!ok)
147 return (EINVAL);
148 lastnode = node;
149 }
150
151 name = value = NULL;
152 error = 0;
153 switch (cmd) {
154
155 case OFIOCGET:
156 case OFIOCGETPROPLEN:
157 if (node == 0)
158 return (EINVAL);
159 error = openfirm_getstr(of->of_namelen, of->of_name, &name);
160 if (error)
161 break;
162 len = OF_getproplen(node, name);
163 if (cmd == OFIOCGETPROPLEN) {
164 of->of_buflen = len;
165 break;
166 }
167 if (len > of->of_buflen) {
168 error = ENOMEM;
169 break;
170 }
171 of->of_buflen = len;
172 /* -1 means no entry; 0 means no value */
173 if (len <= 0)
174 break;
175 value = malloc(len, M_TEMP, M_WAITOK);
176 if (value == NULL) {
177 error = ENOMEM;
178 break;
179 }
180 len = OF_getprop(node, name, (void *)value, len);
181 error = copyout(value, of->of_buf, len);
182 break;
183
|
189#if 0
| |
190 case OFIOCSET:
| 184 case OFIOCSET:
|
| 185 /*
186 * Note: Text string values for at least the /options node
187 * have to be null-terminated and the length paramter must
188 * include this terminating null. However, like OF_getprop(),
189 * OF_setprop() will return the the actual length of the text
190 * string, i.e. omitting the terminating null.
191 */
|
191 if ((flags & FWRITE) == 0)
192 return (EBADF);
193 if (node == 0)
194 return (EINVAL);
| 192 if ((flags & FWRITE) == 0)
193 return (EBADF);
194 if (node == 0)
195 return (EINVAL);
|
| 196 if ((u_int)of->of_buflen > OFIOCMAXVALUE)
197 return (ENAMETOOLONG);
|
195 error = openfirm_getstr(of->of_namelen, of->of_name, &name);
196 if (error)
197 break;
| 198 error = openfirm_getstr(of->of_namelen, of->of_name, &name);
199 if (error)
200 break;
|
198 error = openfirm_getstr(of->of_buflen, of->of_buf, &value);
| 201 value = malloc(of->of_buflen, M_TEMP, M_WAITOK);
202 if (value == NULL) {
203 error = ENOMEM;
204 break;
205 }
206 error = copyin(of->of_buf, value, of->of_buflen);
|
199 if (error)
200 break;
201 len = OF_setprop(node, name, value, of->of_buflen);
| 207 if (error)
208 break;
209 len = OF_setprop(node, name, value, of->of_buflen);
|
202 if (len != of->of_buflen)
| 210 if (len < 0)
|
203 error = EINVAL;
| 211 error = EINVAL;
|
| 212 of->of_buflen = len;
|
204 break;
| 213 break;
|
205#endif
| |
206
207 case OFIOCNEXTPROP:
208 if (node == 0 || of->of_buflen < 0)
209 return (EINVAL);
210 if (of->of_namelen != 0) {
211 error = openfirm_getstr(of->of_namelen, of->of_name,
212 &name);
213 if (error)
214 break;
215 }
216 ok = OF_nextprop(node, name, newname);
217 if (ok == 0) {
218 error = ENOENT;
219 break;
220 }
221 if (ok == -1) {
222 error = EINVAL;
223 break;
224 }
225 len = strlen(newname) + 1;
226 if (len > of->of_buflen)
227 len = of->of_buflen;
228 else
229 of->of_buflen = len;
230 error = copyout(newname, of->of_buf, len);
231 break;
232
233 case OFIOCGETNEXT:
234 node = OF_peer(node);
235 *(phandle_t *)data = lastnode = node;
236 break;
237
238 case OFIOCGETCHILD:
239 if (node == 0)
240 return (EINVAL);
241 node = OF_child(node);
242 *(phandle_t *)data = lastnode = node;
243 break;
244
245 case OFIOCFINDDEVICE:
246 error = openfirm_getstr(of->of_namelen, of->of_name, &name);
247 if (error)
248 break;
249 node = OF_finddevice(name);
250 if (node == 0 || node == -1) {
251 error = ENOENT;
252 break;
253 }
254 of->of_nodeid = lastnode = node;
255 break;
256 }
257
258 if (name != NULL)
259 free(name, M_TEMP);
260 if (value != NULL)
261 free(value, M_TEMP);
262
263 return (error);
264}
265
266static int
267openfirm_modevent(module_t mod, int type, void *data)
268{
269 switch(type) {
270 case MOD_LOAD:
271 if (bootverbose)
272 printf("openfirm: <OpenFirmware control device>\n");
273 /*
274 * Allow only root access by default; this device may allow
275 * users to peek into firmware passwords, and likely to crash
276 * the machine on some boxen due to firmware quirks.
277 */
278 openfirm_dev = make_dev(&openfirm_cdevsw, OPENFIRM_MINOR,
279 UID_ROOT, GID_WHEEL, 0600, "openfirm");
280 return 0;
281
282 case MOD_UNLOAD:
283 destroy_dev(openfirm_dev);
284 return 0;
285
286 case MOD_SHUTDOWN:
287 return 0;
288
289 default:
290 return EOPNOTSUPP;
291 }
292}
293
294DEV_MODULE(openfirm, openfirm_modevent, NULL);
| 214
215 case OFIOCNEXTPROP:
216 if (node == 0 || of->of_buflen < 0)
217 return (EINVAL);
218 if (of->of_namelen != 0) {
219 error = openfirm_getstr(of->of_namelen, of->of_name,
220 &name);
221 if (error)
222 break;
223 }
224 ok = OF_nextprop(node, name, newname);
225 if (ok == 0) {
226 error = ENOENT;
227 break;
228 }
229 if (ok == -1) {
230 error = EINVAL;
231 break;
232 }
233 len = strlen(newname) + 1;
234 if (len > of->of_buflen)
235 len = of->of_buflen;
236 else
237 of->of_buflen = len;
238 error = copyout(newname, of->of_buf, len);
239 break;
240
241 case OFIOCGETNEXT:
242 node = OF_peer(node);
243 *(phandle_t *)data = lastnode = node;
244 break;
245
246 case OFIOCGETCHILD:
247 if (node == 0)
248 return (EINVAL);
249 node = OF_child(node);
250 *(phandle_t *)data = lastnode = node;
251 break;
252
253 case OFIOCFINDDEVICE:
254 error = openfirm_getstr(of->of_namelen, of->of_name, &name);
255 if (error)
256 break;
257 node = OF_finddevice(name);
258 if (node == 0 || node == -1) {
259 error = ENOENT;
260 break;
261 }
262 of->of_nodeid = lastnode = node;
263 break;
264 }
265
266 if (name != NULL)
267 free(name, M_TEMP);
268 if (value != NULL)
269 free(value, M_TEMP);
270
271 return (error);
272}
273
274static int
275openfirm_modevent(module_t mod, int type, void *data)
276{
277 switch(type) {
278 case MOD_LOAD:
279 if (bootverbose)
280 printf("openfirm: <OpenFirmware control device>\n");
281 /*
282 * Allow only root access by default; this device may allow
283 * users to peek into firmware passwords, and likely to crash
284 * the machine on some boxen due to firmware quirks.
285 */
286 openfirm_dev = make_dev(&openfirm_cdevsw, OPENFIRM_MINOR,
287 UID_ROOT, GID_WHEEL, 0600, "openfirm");
288 return 0;
289
290 case MOD_UNLOAD:
291 destroy_dev(openfirm_dev);
292 return 0;
293
294 case MOD_SHUTDOWN:
295 return 0;
296
297 default:
298 return EOPNOTSUPP;
299 }
300}
301
302DEV_MODULE(openfirm, openfirm_modevent, NULL);
|