1/* $NetBSD: openfirmio.c,v 1.4 2002/09/06 13:23:19 gehenna Exp $ */
2
3/*
4 * Copyright (c) 1992, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This software was developed by the Computer Systems Engineering group
8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
9 * contributed to Berkeley.
10 *
11 * All advertising materials mentioning features or use of this software
12 * must display the following acknowledgement:
13 * This product includes software developed by the University of
14 * California, Lawrence Berkeley Laboratory.
15 *
16 * Redistribution and use in source and binary forms, with or without
17 * modification, are permitted provided that the following conditions
18 * are met:
19 * 1. Redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer.
21 * 2. Redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution.
24 * 3. All advertising materials mentioning features or use of this software
25 * must display the following acknowledgement:
26 * This product includes software developed by the University of
27 * California, Berkeley and its contributors.
28 * 4. Neither the name of the University nor the names of its contributors
29 * may be used to endorse or promote products derived from this software
30 * without specific prior written permission.
31 *
32 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
33 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
34 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
35 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
36 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
40 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
41 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
42 * SUCH DAMAGE.
43 *
44 * @(#)openfirm.c 8.1 (Berkeley) 6/11/93
45 *
| 1/* $NetBSD: openfirmio.c,v 1.4 2002/09/06 13:23:19 gehenna Exp $ */
2
3/*
4 * Copyright (c) 1992, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This software was developed by the Computer Systems Engineering group
8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
9 * contributed to Berkeley.
10 *
11 * All advertising materials mentioning features or use of this software
12 * must display the following acknowledgement:
13 * This product includes software developed by the University of
14 * California, Lawrence Berkeley Laboratory.
15 *
16 * Redistribution and use in source and binary forms, with or without
17 * modification, are permitted provided that the following conditions
18 * are met:
19 * 1. Redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer.
21 * 2. Redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution.
24 * 3. All advertising materials mentioning features or use of this software
25 * must display the following acknowledgement:
26 * This product includes software developed by the University of
27 * California, Berkeley and its contributors.
28 * 4. Neither the name of the University nor the names of its contributors
29 * may be used to endorse or promote products derived from this software
30 * without specific prior written permission.
31 *
32 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
33 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
34 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
35 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
36 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
40 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
41 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
42 * SUCH DAMAGE.
43 *
44 * @(#)openfirm.c 8.1 (Berkeley) 6/11/93
45 *
|
69 /* open */ nullopen,
70 /* close */ nullclose,
71 /* read */ noread,
72 /* write */ nowrite,
73 /* ioctl */ openfirm_ioctl,
74 /* poll */ nopoll,
75 /* mmap */ nommap,
76 /* strategy */ nostrategy,
77 /* name */ "openfirm",
78 /* maj */ CDEV_MAJOR,
79 /* dump */ nodump,
80 /* psize */ nopsize,
81 /* flags */ 0,
82 /* kqfilter */ nokqfilter
| 69 .d_open = nullopen,
70 .d_close = nullclose,
71 .d_ioctl = openfirm_ioctl,
72 .d_name = "openfirm",
73 .d_maj = CDEV_MAJOR,
|
83};
84
85static phandle_t lastnode; /* speed hack */
86
87static int openfirm_checkid(phandle_t, phandle_t);
88static int openfirm_getstr(int, const char *, char **);
89
90/* Maximum accepted name length. */
91#define OFW_NAME_MAX 8191
92
93/*
94 * Verify target ID is valid (exists in the OPENPROM tree), as
95 * listed from node ID sid forward.
96 */
97static int
98openfirm_checkid(phandle_t sid, phandle_t tid)
99{
100
101 for (; sid != 0; sid = OF_peer(sid))
102 if (sid == tid || openfirm_checkid(OF_child(sid), tid))
103 return (1);
104
105 return (0);
106}
107
108static int
109openfirm_getstr(int len, const char *user, char **cpp)
110{
111 int error;
112 char *cp;
113
114 /* Reject obvious bogus requests */
115 if ((u_int)len > OFW_NAME_MAX)
116 return (ENAMETOOLONG);
117
118 *cpp = cp = malloc(len + 1, M_TEMP, M_WAITOK);
119 if (cp == NULL)
120 return (ENOMEM);
121 error = copyin(user, cp, len);
122 cp[len] = '\0';
123 return (error);
124}
125
126int
127openfirm_ioctl(dev_t dev, u_long cmd, caddr_t data, int flags,
128 struct thread *td)
129{
130 struct ofiocdesc *of;
131 phandle_t node;
132 int len, ok, error;
133 char *name, *value;
134 char newname[32];
135
136 of = (struct ofiocdesc *)data;
137 switch (cmd) {
138 case OFIOCGETOPTNODE:
139 *(phandle_t *) data = OF_finddevice("/options");
140 return (0);
141 case OFIOCGET:
142#if 0
143 case OFIOCSET:
144#endif
145 case OFIOCNEXTPROP:
146 case OFIOCFINDDEVICE:
147 node = of->of_nodeid;
148 break;
149 case OFIOCGETNEXT:
150 case OFIOCGETCHILD:
151 node = *(phandle_t *)data;
152 break;
153 default:
154 return (ENOTTY);
155 }
156
157 if (node != 0 && node != lastnode) {
158 /* Not an easy one, must search for it */
159 ok = openfirm_checkid(OF_peer(0), node);
160 if (!ok)
161 return (EINVAL);
162 lastnode = node;
163 }
164
165 name = value = NULL;
166 error = 0;
167 switch (cmd) {
168
169 case OFIOCGET:
170 if ((flags & FREAD) == 0)
171 return (EBADF);
172 if (node == 0)
173 return (EINVAL);
174 error = openfirm_getstr(of->of_namelen, of->of_name, &name);
175 if (error)
176 break;
177 len = OF_getproplen(node, name);
178 if (len > of->of_buflen) {
179 error = ENOMEM;
180 break;
181 }
182 of->of_buflen = len;
183 /* -1 means no entry; 0 means no value */
184 if (len <= 0)
185 break;
186 value = malloc(len, M_TEMP, M_WAITOK);
187 if (value == NULL) {
188 error = ENOMEM;
189 break;
190 }
191 len = OF_getprop(node, name, (void *)value, len);
192 error = copyout(value, of->of_buf, len);
193 break;
194
195#if 0
196 case OFIOCSET:
197 if ((flags & FWRITE) == 0)
198 return (EBADF);
199 if (node == 0)
200 return (EINVAL);
201 error = openfirm_getstr(of->of_namelen, of->of_name, &name);
202 if (error)
203 break;
204 error = openfirm_getstr(of->of_buflen, of->of_buf, &value);
205 if (error)
206 break;
207 len = OF_setprop(node, name, value, of->of_buflen);
208 if (len != of->of_buflen)
209 error = EINVAL;
210 break;
211#endif
212
213 case OFIOCNEXTPROP:
214 if ((flags & FREAD) == 0)
215 return (EBADF);
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 if ((flags & FREAD) == 0)
243 return (EBADF);
244 node = OF_peer(node);
245 *(phandle_t *)data = lastnode = node;
246 break;
247
248 case OFIOCGETCHILD:
249 if ((flags & FREAD) == 0)
250 return (EBADF);
251 if (node == 0)
252 return (EINVAL);
253 node = OF_child(node);
254 *(phandle_t *)data = lastnode = node;
255 break;
256
257 case OFIOCFINDDEVICE:
258 if ((flags & FREAD) == 0)
259 return (EBADF);
260 error = openfirm_getstr(of->of_namelen, of->of_name, &name);
261 if (error)
262 break;
263 node = OF_finddevice(name);
264 if (node == 0 || node == -1) {
265 error = ENOENT;
266 break;
267 }
268 of->of_nodeid = lastnode = node;
269 break;
270 }
271
272 if (name != NULL)
273 free(name, M_TEMP);
274 if (value != NULL)
275 free(value, M_TEMP);
276
277 return (error);
278}
279
280static int
281openfirm_modevent(module_t mod, int type, void *data)
282{
283 switch(type) {
284 case MOD_LOAD:
285 if (bootverbose)
286 printf("openfirm: <OpenFirmware control device>\n");
287 /*
288 * Allow only root access by default; this device may allow
289 * users to peek into firmware passwords, and likely to crash
290 * the machine on some boxen due to firmware quirks.
291 */
292 openfirm_dev = make_dev(&openfirm_cdevsw, OPENFIRM_MINOR,
293 UID_ROOT, GID_WHEEL, 0600, "openfirm");
294 return 0;
295
296 case MOD_UNLOAD:
297 destroy_dev(openfirm_dev);
298 return 0;
299
300 case MOD_SHUTDOWN:
301 return 0;
302
303 default:
304 return EOPNOTSUPP;
305 }
306}
307
308DEV_MODULE(openfirm, openfirm_modevent, NULL);
| 74};
75
76static phandle_t lastnode; /* speed hack */
77
78static int openfirm_checkid(phandle_t, phandle_t);
79static int openfirm_getstr(int, const char *, char **);
80
81/* Maximum accepted name length. */
82#define OFW_NAME_MAX 8191
83
84/*
85 * Verify target ID is valid (exists in the OPENPROM tree), as
86 * listed from node ID sid forward.
87 */
88static int
89openfirm_checkid(phandle_t sid, phandle_t tid)
90{
91
92 for (; sid != 0; sid = OF_peer(sid))
93 if (sid == tid || openfirm_checkid(OF_child(sid), tid))
94 return (1);
95
96 return (0);
97}
98
99static int
100openfirm_getstr(int len, const char *user, char **cpp)
101{
102 int error;
103 char *cp;
104
105 /* Reject obvious bogus requests */
106 if ((u_int)len > OFW_NAME_MAX)
107 return (ENAMETOOLONG);
108
109 *cpp = cp = malloc(len + 1, M_TEMP, M_WAITOK);
110 if (cp == NULL)
111 return (ENOMEM);
112 error = copyin(user, cp, len);
113 cp[len] = '\0';
114 return (error);
115}
116
117int
118openfirm_ioctl(dev_t dev, u_long cmd, caddr_t data, int flags,
119 struct thread *td)
120{
121 struct ofiocdesc *of;
122 phandle_t node;
123 int len, ok, error;
124 char *name, *value;
125 char newname[32];
126
127 of = (struct ofiocdesc *)data;
128 switch (cmd) {
129 case OFIOCGETOPTNODE:
130 *(phandle_t *) data = OF_finddevice("/options");
131 return (0);
132 case OFIOCGET:
133#if 0
134 case OFIOCSET:
135#endif
136 case OFIOCNEXTPROP:
137 case OFIOCFINDDEVICE:
138 node = of->of_nodeid;
139 break;
140 case OFIOCGETNEXT:
141 case OFIOCGETCHILD:
142 node = *(phandle_t *)data;
143 break;
144 default:
145 return (ENOTTY);
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 if ((flags & FREAD) == 0)
162 return (EBADF);
163 if (node == 0)
164 return (EINVAL);
165 error = openfirm_getstr(of->of_namelen, of->of_name, &name);
166 if (error)
167 break;
168 len = OF_getproplen(node, name);
169 if (len > of->of_buflen) {
170 error = ENOMEM;
171 break;
172 }
173 of->of_buflen = len;
174 /* -1 means no entry; 0 means no value */
175 if (len <= 0)
176 break;
177 value = malloc(len, M_TEMP, M_WAITOK);
178 if (value == NULL) {
179 error = ENOMEM;
180 break;
181 }
182 len = OF_getprop(node, name, (void *)value, len);
183 error = copyout(value, of->of_buf, len);
184 break;
185
186#if 0
187 case OFIOCSET:
188 if ((flags & FWRITE) == 0)
189 return (EBADF);
190 if (node == 0)
191 return (EINVAL);
192 error = openfirm_getstr(of->of_namelen, of->of_name, &name);
193 if (error)
194 break;
195 error = openfirm_getstr(of->of_buflen, of->of_buf, &value);
196 if (error)
197 break;
198 len = OF_setprop(node, name, value, of->of_buflen);
199 if (len != of->of_buflen)
200 error = EINVAL;
201 break;
202#endif
203
204 case OFIOCNEXTPROP:
205 if ((flags & FREAD) == 0)
206 return (EBADF);
207 if (node == 0 || of->of_buflen < 0)
208 return (EINVAL);
209 if (of->of_namelen != 0) {
210 error = openfirm_getstr(of->of_namelen, of->of_name,
211 &name);
212 if (error)
213 break;
214 }
215 ok = OF_nextprop(node, name, newname);
216 if (ok == 0) {
217 error = ENOENT;
218 break;
219 }
220 if (ok == -1) {
221 error = EINVAL;
222 break;
223 }
224 len = strlen(newname) + 1;
225 if (len > of->of_buflen)
226 len = of->of_buflen;
227 else
228 of->of_buflen = len;
229 error = copyout(newname, of->of_buf, len);
230 break;
231
232 case OFIOCGETNEXT:
233 if ((flags & FREAD) == 0)
234 return (EBADF);
235 node = OF_peer(node);
236 *(phandle_t *)data = lastnode = node;
237 break;
238
239 case OFIOCGETCHILD:
240 if ((flags & FREAD) == 0)
241 return (EBADF);
242 if (node == 0)
243 return (EINVAL);
244 node = OF_child(node);
245 *(phandle_t *)data = lastnode = node;
246 break;
247
248 case OFIOCFINDDEVICE:
249 if ((flags & FREAD) == 0)
250 return (EBADF);
251 error = openfirm_getstr(of->of_namelen, of->of_name, &name);
252 if (error)
253 break;
254 node = OF_finddevice(name);
255 if (node == 0 || node == -1) {
256 error = ENOENT;
257 break;
258 }
259 of->of_nodeid = lastnode = node;
260 break;
261 }
262
263 if (name != NULL)
264 free(name, M_TEMP);
265 if (value != NULL)
266 free(value, M_TEMP);
267
268 return (error);
269}
270
271static int
272openfirm_modevent(module_t mod, int type, void *data)
273{
274 switch(type) {
275 case MOD_LOAD:
276 if (bootverbose)
277 printf("openfirm: <OpenFirmware control device>\n");
278 /*
279 * Allow only root access by default; this device may allow
280 * users to peek into firmware passwords, and likely to crash
281 * the machine on some boxen due to firmware quirks.
282 */
283 openfirm_dev = make_dev(&openfirm_cdevsw, OPENFIRM_MINOR,
284 UID_ROOT, GID_WHEEL, 0600, "openfirm");
285 return 0;
286
287 case MOD_UNLOAD:
288 destroy_dev(openfirm_dev);
289 return 0;
290
291 case MOD_SHUTDOWN:
292 return 0;
293
294 default:
295 return EOPNOTSUPP;
296 }
297}
298
299DEV_MODULE(openfirm, openfirm_modevent, NULL);
|