Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * ipmi_devintf.c | |
3 | * | |
4 | * Linux device interface for the IPMI message handler. | |
5 | * | |
6 | * Author: MontaVista Software, Inc. | |
7 | * Corey Minyard <minyard@mvista.com> | |
8 | * source@mvista.com | |
9 | * | |
10 | * Copyright 2002 MontaVista Software Inc. | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify it | |
13 | * under the terms of the GNU General Public License as published by the | |
14 | * Free Software Foundation; either version 2 of the License, or (at your | |
15 | * option) any later version. | |
16 | * | |
17 | * | |
18 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
19 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
20 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, | |
23 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS | |
24 | * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND | |
25 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR | |
26 | * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE | |
27 | * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
28 | * | |
29 | * You should have received a copy of the GNU General Public License along | |
30 | * with this program; if not, write to the Free Software Foundation, Inc., | |
31 | * 675 Mass Ave, Cambridge, MA 02139, USA. | |
32 | */ | |
33 | ||
1da177e4 LT |
34 | #include <linux/module.h> |
35 | #include <linux/moduleparam.h> | |
36 | #include <linux/errno.h> | |
37 | #include <asm/system.h> | |
1da177e4 LT |
38 | #include <linux/poll.h> |
39 | #include <linux/spinlock.h> | |
40 | #include <linux/slab.h> | |
1da177e4 | 41 | #include <linux/ipmi.h> |
d6dfd131 | 42 | #include <linux/mutex.h> |
1da177e4 | 43 | #include <linux/init.h> |
37e0915b | 44 | #include <linux/device.h> |
6a94f920 | 45 | #include <linux/compat.h> |
1da177e4 | 46 | |
1da177e4 LT |
47 | struct ipmi_file_private |
48 | { | |
49 | ipmi_user_t user; | |
50 | spinlock_t recv_msg_lock; | |
51 | struct list_head recv_msgs; | |
52 | struct file *file; | |
53 | struct fasync_struct *fasync_queue; | |
54 | wait_queue_head_t wait; | |
d6dfd131 | 55 | struct mutex recv_mutex; |
1da177e4 LT |
56 | int default_retries; |
57 | unsigned int default_retry_time_ms; | |
58 | }; | |
59 | ||
60 | static void file_receive_handler(struct ipmi_recv_msg *msg, | |
61 | void *handler_data) | |
62 | { | |
63 | struct ipmi_file_private *priv = handler_data; | |
64 | int was_empty; | |
65 | unsigned long flags; | |
66 | ||
67 | spin_lock_irqsave(&(priv->recv_msg_lock), flags); | |
68 | ||
69 | was_empty = list_empty(&(priv->recv_msgs)); | |
70 | list_add_tail(&(msg->link), &(priv->recv_msgs)); | |
71 | ||
72 | if (was_empty) { | |
73 | wake_up_interruptible(&priv->wait); | |
74 | kill_fasync(&priv->fasync_queue, SIGIO, POLL_IN); | |
75 | } | |
76 | ||
77 | spin_unlock_irqrestore(&(priv->recv_msg_lock), flags); | |
78 | } | |
79 | ||
80 | static unsigned int ipmi_poll(struct file *file, poll_table *wait) | |
81 | { | |
82 | struct ipmi_file_private *priv = file->private_data; | |
83 | unsigned int mask = 0; | |
84 | unsigned long flags; | |
85 | ||
86 | poll_wait(file, &priv->wait, wait); | |
87 | ||
88 | spin_lock_irqsave(&priv->recv_msg_lock, flags); | |
89 | ||
50c812b2 | 90 | if (!list_empty(&(priv->recv_msgs))) |
1da177e4 LT |
91 | mask |= (POLLIN | POLLRDNORM); |
92 | ||
93 | spin_unlock_irqrestore(&priv->recv_msg_lock, flags); | |
94 | ||
95 | return mask; | |
96 | } | |
97 | ||
98 | static int ipmi_fasync(int fd, struct file *file, int on) | |
99 | { | |
100 | struct ipmi_file_private *priv = file->private_data; | |
101 | int result; | |
102 | ||
103 | result = fasync_helper(fd, file, on, &priv->fasync_queue); | |
104 | ||
105 | return (result); | |
106 | } | |
107 | ||
108 | static struct ipmi_user_hndl ipmi_hndlrs = | |
109 | { | |
110 | .ipmi_recv_hndl = file_receive_handler, | |
111 | }; | |
112 | ||
113 | static int ipmi_open(struct inode *inode, struct file *file) | |
114 | { | |
115 | int if_num = iminor(inode); | |
116 | int rv; | |
117 | struct ipmi_file_private *priv; | |
118 | ||
119 | ||
120 | priv = kmalloc(sizeof(*priv), GFP_KERNEL); | |
121 | if (!priv) | |
122 | return -ENOMEM; | |
123 | ||
124 | priv->file = file; | |
125 | ||
126 | rv = ipmi_create_user(if_num, | |
127 | &ipmi_hndlrs, | |
128 | priv, | |
129 | &(priv->user)); | |
130 | if (rv) { | |
131 | kfree(priv); | |
132 | return rv; | |
133 | } | |
134 | ||
135 | file->private_data = priv; | |
136 | ||
137 | spin_lock_init(&(priv->recv_msg_lock)); | |
138 | INIT_LIST_HEAD(&(priv->recv_msgs)); | |
139 | init_waitqueue_head(&priv->wait); | |
140 | priv->fasync_queue = NULL; | |
d6dfd131 | 141 | mutex_init(&priv->recv_mutex); |
1da177e4 LT |
142 | |
143 | /* Use the low-level defaults. */ | |
144 | priv->default_retries = -1; | |
145 | priv->default_retry_time_ms = 0; | |
146 | ||
147 | return 0; | |
148 | } | |
149 | ||
150 | static int ipmi_release(struct inode *inode, struct file *file) | |
151 | { | |
152 | struct ipmi_file_private *priv = file->private_data; | |
153 | int rv; | |
154 | ||
155 | rv = ipmi_destroy_user(priv->user); | |
156 | if (rv) | |
157 | return rv; | |
158 | ||
159 | ipmi_fasync (-1, file, 0); | |
160 | ||
161 | /* FIXME - free the messages in the list. */ | |
162 | kfree(priv); | |
163 | ||
164 | return 0; | |
165 | } | |
166 | ||
167 | static int handle_send_req(ipmi_user_t user, | |
168 | struct ipmi_req *req, | |
169 | int retries, | |
170 | unsigned int retry_time_ms) | |
171 | { | |
172 | int rv; | |
173 | struct ipmi_addr addr; | |
174 | struct kernel_ipmi_msg msg; | |
175 | ||
176 | if (req->addr_len > sizeof(struct ipmi_addr)) | |
177 | return -EINVAL; | |
178 | ||
179 | if (copy_from_user(&addr, req->addr, req->addr_len)) | |
180 | return -EFAULT; | |
181 | ||
182 | msg.netfn = req->msg.netfn; | |
183 | msg.cmd = req->msg.cmd; | |
184 | msg.data_len = req->msg.data_len; | |
185 | msg.data = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL); | |
186 | if (!msg.data) | |
187 | return -ENOMEM; | |
188 | ||
189 | /* From here out we cannot return, we must jump to "out" for | |
190 | error exits to free msgdata. */ | |
191 | ||
192 | rv = ipmi_validate_addr(&addr, req->addr_len); | |
193 | if (rv) | |
194 | goto out; | |
195 | ||
196 | if (req->msg.data != NULL) { | |
197 | if (req->msg.data_len > IPMI_MAX_MSG_LENGTH) { | |
198 | rv = -EMSGSIZE; | |
199 | goto out; | |
200 | } | |
201 | ||
202 | if (copy_from_user(msg.data, | |
203 | req->msg.data, | |
204 | req->msg.data_len)) | |
205 | { | |
206 | rv = -EFAULT; | |
207 | goto out; | |
208 | } | |
209 | } else { | |
210 | msg.data_len = 0; | |
211 | } | |
212 | ||
213 | rv = ipmi_request_settime(user, | |
214 | &addr, | |
215 | req->msgid, | |
216 | &msg, | |
217 | NULL, | |
218 | 0, | |
219 | retries, | |
220 | retry_time_ms); | |
221 | out: | |
222 | kfree(msg.data); | |
223 | return rv; | |
224 | } | |
225 | ||
226 | static int ipmi_ioctl(struct inode *inode, | |
227 | struct file *file, | |
228 | unsigned int cmd, | |
229 | unsigned long data) | |
230 | { | |
231 | int rv = -EINVAL; | |
232 | struct ipmi_file_private *priv = file->private_data; | |
233 | void __user *arg = (void __user *)data; | |
234 | ||
235 | switch (cmd) | |
236 | { | |
237 | case IPMICTL_SEND_COMMAND: | |
238 | { | |
239 | struct ipmi_req req; | |
240 | ||
241 | if (copy_from_user(&req, arg, sizeof(req))) { | |
242 | rv = -EFAULT; | |
243 | break; | |
244 | } | |
245 | ||
246 | rv = handle_send_req(priv->user, | |
247 | &req, | |
248 | priv->default_retries, | |
249 | priv->default_retry_time_ms); | |
250 | break; | |
251 | } | |
252 | ||
253 | case IPMICTL_SEND_COMMAND_SETTIME: | |
254 | { | |
255 | struct ipmi_req_settime req; | |
256 | ||
257 | if (copy_from_user(&req, arg, sizeof(req))) { | |
258 | rv = -EFAULT; | |
259 | break; | |
260 | } | |
261 | ||
262 | rv = handle_send_req(priv->user, | |
263 | &req.req, | |
264 | req.retries, | |
265 | req.retry_time_ms); | |
266 | break; | |
267 | } | |
268 | ||
269 | case IPMICTL_RECEIVE_MSG: | |
270 | case IPMICTL_RECEIVE_MSG_TRUNC: | |
271 | { | |
272 | struct ipmi_recv rsp; | |
273 | int addr_len; | |
274 | struct list_head *entry; | |
275 | struct ipmi_recv_msg *msg; | |
276 | unsigned long flags; | |
277 | ||
278 | ||
279 | rv = 0; | |
280 | if (copy_from_user(&rsp, arg, sizeof(rsp))) { | |
281 | rv = -EFAULT; | |
282 | break; | |
283 | } | |
284 | ||
d6dfd131 | 285 | /* We claim a mutex because we don't want two |
1da177e4 LT |
286 | users getting something from the queue at a time. |
287 | Since we have to release the spinlock before we can | |
288 | copy the data to the user, it's possible another | |
289 | user will grab something from the queue, too. Then | |
290 | the messages might get out of order if something | |
291 | fails and the message gets put back onto the | |
d6dfd131 CM |
292 | queue. This mutex prevents that problem. */ |
293 | mutex_lock(&priv->recv_mutex); | |
1da177e4 LT |
294 | |
295 | /* Grab the message off the list. */ | |
296 | spin_lock_irqsave(&(priv->recv_msg_lock), flags); | |
297 | if (list_empty(&(priv->recv_msgs))) { | |
298 | spin_unlock_irqrestore(&(priv->recv_msg_lock), flags); | |
299 | rv = -EAGAIN; | |
300 | goto recv_err; | |
301 | } | |
302 | entry = priv->recv_msgs.next; | |
303 | msg = list_entry(entry, struct ipmi_recv_msg, link); | |
304 | list_del(entry); | |
305 | spin_unlock_irqrestore(&(priv->recv_msg_lock), flags); | |
306 | ||
307 | addr_len = ipmi_addr_length(msg->addr.addr_type); | |
308 | if (rsp.addr_len < addr_len) | |
309 | { | |
310 | rv = -EINVAL; | |
311 | goto recv_putback_on_err; | |
312 | } | |
313 | ||
314 | if (copy_to_user(rsp.addr, &(msg->addr), addr_len)) { | |
315 | rv = -EFAULT; | |
316 | goto recv_putback_on_err; | |
317 | } | |
318 | rsp.addr_len = addr_len; | |
319 | ||
320 | rsp.recv_type = msg->recv_type; | |
321 | rsp.msgid = msg->msgid; | |
322 | rsp.msg.netfn = msg->msg.netfn; | |
323 | rsp.msg.cmd = msg->msg.cmd; | |
324 | ||
325 | if (msg->msg.data_len > 0) { | |
326 | if (rsp.msg.data_len < msg->msg.data_len) { | |
327 | rv = -EMSGSIZE; | |
328 | if (cmd == IPMICTL_RECEIVE_MSG_TRUNC) { | |
329 | msg->msg.data_len = rsp.msg.data_len; | |
330 | } else { | |
331 | goto recv_putback_on_err; | |
332 | } | |
333 | } | |
334 | ||
335 | if (copy_to_user(rsp.msg.data, | |
336 | msg->msg.data, | |
337 | msg->msg.data_len)) | |
338 | { | |
339 | rv = -EFAULT; | |
340 | goto recv_putback_on_err; | |
341 | } | |
342 | rsp.msg.data_len = msg->msg.data_len; | |
343 | } else { | |
344 | rsp.msg.data_len = 0; | |
345 | } | |
346 | ||
347 | if (copy_to_user(arg, &rsp, sizeof(rsp))) { | |
348 | rv = -EFAULT; | |
349 | goto recv_putback_on_err; | |
350 | } | |
351 | ||
d6dfd131 | 352 | mutex_unlock(&priv->recv_mutex); |
1da177e4 LT |
353 | ipmi_free_recv_msg(msg); |
354 | break; | |
355 | ||
356 | recv_putback_on_err: | |
357 | /* If we got an error, put the message back onto | |
358 | the head of the queue. */ | |
359 | spin_lock_irqsave(&(priv->recv_msg_lock), flags); | |
360 | list_add(entry, &(priv->recv_msgs)); | |
361 | spin_unlock_irqrestore(&(priv->recv_msg_lock), flags); | |
d6dfd131 | 362 | mutex_unlock(&priv->recv_mutex); |
1da177e4 LT |
363 | break; |
364 | ||
365 | recv_err: | |
d6dfd131 | 366 | mutex_unlock(&priv->recv_mutex); |
1da177e4 LT |
367 | break; |
368 | } | |
369 | ||
370 | case IPMICTL_REGISTER_FOR_CMD: | |
371 | { | |
372 | struct ipmi_cmdspec val; | |
373 | ||
374 | if (copy_from_user(&val, arg, sizeof(val))) { | |
375 | rv = -EFAULT; | |
376 | break; | |
377 | } | |
378 | ||
c69c3127 CM |
379 | rv = ipmi_register_for_cmd(priv->user, val.netfn, val.cmd, |
380 | IPMI_CHAN_ALL); | |
1da177e4 LT |
381 | break; |
382 | } | |
383 | ||
384 | case IPMICTL_UNREGISTER_FOR_CMD: | |
385 | { | |
386 | struct ipmi_cmdspec val; | |
387 | ||
388 | if (copy_from_user(&val, arg, sizeof(val))) { | |
389 | rv = -EFAULT; | |
390 | break; | |
391 | } | |
392 | ||
c69c3127 CM |
393 | rv = ipmi_unregister_for_cmd(priv->user, val.netfn, val.cmd, |
394 | IPMI_CHAN_ALL); | |
395 | break; | |
396 | } | |
397 | ||
398 | case IPMICTL_REGISTER_FOR_CMD_CHANS: | |
399 | { | |
400 | struct ipmi_cmdspec_chans val; | |
401 | ||
402 | if (copy_from_user(&val, arg, sizeof(val))) { | |
403 | rv = -EFAULT; | |
404 | break; | |
405 | } | |
406 | ||
407 | rv = ipmi_register_for_cmd(priv->user, val.netfn, val.cmd, | |
408 | val.chans); | |
409 | break; | |
410 | } | |
411 | ||
412 | case IPMICTL_UNREGISTER_FOR_CMD_CHANS: | |
413 | { | |
414 | struct ipmi_cmdspec_chans val; | |
415 | ||
416 | if (copy_from_user(&val, arg, sizeof(val))) { | |
417 | rv = -EFAULT; | |
418 | break; | |
419 | } | |
420 | ||
421 | rv = ipmi_unregister_for_cmd(priv->user, val.netfn, val.cmd, | |
422 | val.chans); | |
1da177e4 LT |
423 | break; |
424 | } | |
425 | ||
426 | case IPMICTL_SET_GETS_EVENTS_CMD: | |
427 | { | |
428 | int val; | |
429 | ||
430 | if (copy_from_user(&val, arg, sizeof(val))) { | |
431 | rv = -EFAULT; | |
432 | break; | |
433 | } | |
434 | ||
435 | rv = ipmi_set_gets_events(priv->user, val); | |
436 | break; | |
437 | } | |
438 | ||
c14979b9 | 439 | /* The next four are legacy, not per-channel. */ |
1da177e4 LT |
440 | case IPMICTL_SET_MY_ADDRESS_CMD: |
441 | { | |
442 | unsigned int val; | |
443 | ||
444 | if (copy_from_user(&val, arg, sizeof(val))) { | |
445 | rv = -EFAULT; | |
446 | break; | |
447 | } | |
448 | ||
c14979b9 | 449 | rv = ipmi_set_my_address(priv->user, 0, val); |
1da177e4 LT |
450 | break; |
451 | } | |
452 | ||
453 | case IPMICTL_GET_MY_ADDRESS_CMD: | |
454 | { | |
c14979b9 CM |
455 | unsigned int val; |
456 | unsigned char rval; | |
457 | ||
458 | rv = ipmi_get_my_address(priv->user, 0, &rval); | |
459 | if (rv) | |
460 | break; | |
1da177e4 | 461 | |
c14979b9 | 462 | val = rval; |
1da177e4 LT |
463 | |
464 | if (copy_to_user(arg, &val, sizeof(val))) { | |
465 | rv = -EFAULT; | |
466 | break; | |
467 | } | |
1da177e4 LT |
468 | break; |
469 | } | |
470 | ||
471 | case IPMICTL_SET_MY_LUN_CMD: | |
472 | { | |
473 | unsigned int val; | |
474 | ||
475 | if (copy_from_user(&val, arg, sizeof(val))) { | |
476 | rv = -EFAULT; | |
477 | break; | |
478 | } | |
479 | ||
c14979b9 | 480 | rv = ipmi_set_my_LUN(priv->user, 0, val); |
1da177e4 LT |
481 | break; |
482 | } | |
483 | ||
484 | case IPMICTL_GET_MY_LUN_CMD: | |
485 | { | |
c14979b9 CM |
486 | unsigned int val; |
487 | unsigned char rval; | |
488 | ||
489 | rv = ipmi_get_my_LUN(priv->user, 0, &rval); | |
490 | if (rv) | |
491 | break; | |
1da177e4 | 492 | |
c14979b9 | 493 | val = rval; |
1da177e4 LT |
494 | |
495 | if (copy_to_user(arg, &val, sizeof(val))) { | |
496 | rv = -EFAULT; | |
497 | break; | |
498 | } | |
1da177e4 LT |
499 | break; |
500 | } | |
c14979b9 CM |
501 | |
502 | case IPMICTL_SET_MY_CHANNEL_ADDRESS_CMD: | |
503 | { | |
504 | struct ipmi_channel_lun_address_set val; | |
505 | ||
506 | if (copy_from_user(&val, arg, sizeof(val))) { | |
507 | rv = -EFAULT; | |
508 | break; | |
509 | } | |
510 | ||
511 | return ipmi_set_my_address(priv->user, val.channel, val.value); | |
512 | break; | |
513 | } | |
514 | ||
515 | case IPMICTL_GET_MY_CHANNEL_ADDRESS_CMD: | |
516 | { | |
517 | struct ipmi_channel_lun_address_set val; | |
518 | ||
519 | if (copy_from_user(&val, arg, sizeof(val))) { | |
520 | rv = -EFAULT; | |
521 | break; | |
522 | } | |
523 | ||
524 | rv = ipmi_get_my_address(priv->user, val.channel, &val.value); | |
525 | if (rv) | |
526 | break; | |
527 | ||
528 | if (copy_to_user(arg, &val, sizeof(val))) { | |
529 | rv = -EFAULT; | |
530 | break; | |
531 | } | |
532 | break; | |
533 | } | |
534 | ||
535 | case IPMICTL_SET_MY_CHANNEL_LUN_CMD: | |
536 | { | |
537 | struct ipmi_channel_lun_address_set val; | |
538 | ||
539 | if (copy_from_user(&val, arg, sizeof(val))) { | |
540 | rv = -EFAULT; | |
541 | break; | |
542 | } | |
543 | ||
544 | rv = ipmi_set_my_LUN(priv->user, val.channel, val.value); | |
545 | break; | |
546 | } | |
547 | ||
548 | case IPMICTL_GET_MY_CHANNEL_LUN_CMD: | |
549 | { | |
550 | struct ipmi_channel_lun_address_set val; | |
551 | ||
552 | if (copy_from_user(&val, arg, sizeof(val))) { | |
553 | rv = -EFAULT; | |
554 | break; | |
555 | } | |
556 | ||
557 | rv = ipmi_get_my_LUN(priv->user, val.channel, &val.value); | |
558 | if (rv) | |
559 | break; | |
560 | ||
561 | if (copy_to_user(arg, &val, sizeof(val))) { | |
562 | rv = -EFAULT; | |
563 | break; | |
564 | } | |
565 | break; | |
566 | } | |
567 | ||
1da177e4 LT |
568 | case IPMICTL_SET_TIMING_PARMS_CMD: |
569 | { | |
570 | struct ipmi_timing_parms parms; | |
571 | ||
572 | if (copy_from_user(&parms, arg, sizeof(parms))) { | |
573 | rv = -EFAULT; | |
574 | break; | |
575 | } | |
576 | ||
577 | priv->default_retries = parms.retries; | |
578 | priv->default_retry_time_ms = parms.retry_time_ms; | |
579 | rv = 0; | |
580 | break; | |
581 | } | |
582 | ||
583 | case IPMICTL_GET_TIMING_PARMS_CMD: | |
584 | { | |
585 | struct ipmi_timing_parms parms; | |
586 | ||
587 | parms.retries = priv->default_retries; | |
588 | parms.retry_time_ms = priv->default_retry_time_ms; | |
589 | ||
590 | if (copy_to_user(arg, &parms, sizeof(parms))) { | |
591 | rv = -EFAULT; | |
592 | break; | |
593 | } | |
594 | ||
595 | rv = 0; | |
596 | break; | |
597 | } | |
b9675136 CM |
598 | |
599 | case IPMICTL_GET_MAINTENANCE_MODE_CMD: | |
600 | { | |
601 | int mode; | |
602 | ||
603 | mode = ipmi_get_maintenance_mode(priv->user); | |
604 | if (copy_to_user(arg, &mode, sizeof(mode))) { | |
605 | rv = -EFAULT; | |
606 | break; | |
607 | } | |
608 | rv = 0; | |
609 | break; | |
610 | } | |
611 | ||
612 | case IPMICTL_SET_MAINTENANCE_MODE_CMD: | |
613 | { | |
614 | int mode; | |
615 | ||
616 | if (copy_from_user(&mode, arg, sizeof(mode))) { | |
617 | rv = -EFAULT; | |
618 | break; | |
619 | } | |
620 | rv = ipmi_set_maintenance_mode(priv->user, mode); | |
621 | break; | |
622 | } | |
1da177e4 LT |
623 | } |
624 | ||
625 | return rv; | |
626 | } | |
627 | ||
6a94f920 AM |
628 | #ifdef CONFIG_COMPAT |
629 | ||
630 | /* | |
631 | * The following code contains code for supporting 32-bit compatible | |
632 | * ioctls on 64-bit kernels. This allows running 32-bit apps on the | |
633 | * 64-bit kernel | |
634 | */ | |
635 | #define COMPAT_IPMICTL_SEND_COMMAND \ | |
636 | _IOR(IPMI_IOC_MAGIC, 13, struct compat_ipmi_req) | |
637 | #define COMPAT_IPMICTL_SEND_COMMAND_SETTIME \ | |
638 | _IOR(IPMI_IOC_MAGIC, 21, struct compat_ipmi_req_settime) | |
639 | #define COMPAT_IPMICTL_RECEIVE_MSG \ | |
640 | _IOWR(IPMI_IOC_MAGIC, 12, struct compat_ipmi_recv) | |
641 | #define COMPAT_IPMICTL_RECEIVE_MSG_TRUNC \ | |
642 | _IOWR(IPMI_IOC_MAGIC, 11, struct compat_ipmi_recv) | |
643 | ||
644 | struct compat_ipmi_msg { | |
645 | u8 netfn; | |
646 | u8 cmd; | |
647 | u16 data_len; | |
648 | compat_uptr_t data; | |
649 | }; | |
650 | ||
651 | struct compat_ipmi_req { | |
652 | compat_uptr_t addr; | |
653 | compat_uint_t addr_len; | |
654 | compat_long_t msgid; | |
655 | struct compat_ipmi_msg msg; | |
656 | }; | |
657 | ||
658 | struct compat_ipmi_recv { | |
659 | compat_int_t recv_type; | |
660 | compat_uptr_t addr; | |
661 | compat_uint_t addr_len; | |
662 | compat_long_t msgid; | |
663 | struct compat_ipmi_msg msg; | |
664 | }; | |
665 | ||
666 | struct compat_ipmi_req_settime { | |
667 | struct compat_ipmi_req req; | |
668 | compat_int_t retries; | |
669 | compat_uint_t retry_time_ms; | |
670 | }; | |
671 | ||
672 | /* | |
673 | * Define some helper functions for copying IPMI data | |
674 | */ | |
675 | static long get_compat_ipmi_msg(struct ipmi_msg *p64, | |
676 | struct compat_ipmi_msg __user *p32) | |
677 | { | |
678 | compat_uptr_t tmp; | |
679 | ||
680 | if (!access_ok(VERIFY_READ, p32, sizeof(*p32)) || | |
681 | __get_user(p64->netfn, &p32->netfn) || | |
682 | __get_user(p64->cmd, &p32->cmd) || | |
683 | __get_user(p64->data_len, &p32->data_len) || | |
684 | __get_user(tmp, &p32->data)) | |
685 | return -EFAULT; | |
686 | p64->data = compat_ptr(tmp); | |
687 | return 0; | |
688 | } | |
689 | ||
690 | static long put_compat_ipmi_msg(struct ipmi_msg *p64, | |
691 | struct compat_ipmi_msg __user *p32) | |
692 | { | |
693 | if (!access_ok(VERIFY_WRITE, p32, sizeof(*p32)) || | |
694 | __put_user(p64->netfn, &p32->netfn) || | |
695 | __put_user(p64->cmd, &p32->cmd) || | |
696 | __put_user(p64->data_len, &p32->data_len)) | |
697 | return -EFAULT; | |
698 | return 0; | |
699 | } | |
700 | ||
701 | static long get_compat_ipmi_req(struct ipmi_req *p64, | |
702 | struct compat_ipmi_req __user *p32) | |
703 | { | |
704 | ||
705 | compat_uptr_t tmp; | |
706 | ||
707 | if (!access_ok(VERIFY_READ, p32, sizeof(*p32)) || | |
708 | __get_user(tmp, &p32->addr) || | |
709 | __get_user(p64->addr_len, &p32->addr_len) || | |
710 | __get_user(p64->msgid, &p32->msgid) || | |
711 | get_compat_ipmi_msg(&p64->msg, &p32->msg)) | |
712 | return -EFAULT; | |
713 | p64->addr = compat_ptr(tmp); | |
714 | return 0; | |
715 | } | |
716 | ||
717 | static long get_compat_ipmi_req_settime(struct ipmi_req_settime *p64, | |
718 | struct compat_ipmi_req_settime __user *p32) | |
719 | { | |
720 | if (!access_ok(VERIFY_READ, p32, sizeof(*p32)) || | |
721 | get_compat_ipmi_req(&p64->req, &p32->req) || | |
722 | __get_user(p64->retries, &p32->retries) || | |
723 | __get_user(p64->retry_time_ms, &p32->retry_time_ms)) | |
724 | return -EFAULT; | |
725 | return 0; | |
726 | } | |
727 | ||
728 | static long get_compat_ipmi_recv(struct ipmi_recv *p64, | |
729 | struct compat_ipmi_recv __user *p32) | |
730 | { | |
731 | compat_uptr_t tmp; | |
732 | ||
733 | if (!access_ok(VERIFY_READ, p32, sizeof(*p32)) || | |
734 | __get_user(p64->recv_type, &p32->recv_type) || | |
735 | __get_user(tmp, &p32->addr) || | |
736 | __get_user(p64->addr_len, &p32->addr_len) || | |
737 | __get_user(p64->msgid, &p32->msgid) || | |
738 | get_compat_ipmi_msg(&p64->msg, &p32->msg)) | |
739 | return -EFAULT; | |
740 | p64->addr = compat_ptr(tmp); | |
741 | return 0; | |
742 | } | |
743 | ||
744 | static long put_compat_ipmi_recv(struct ipmi_recv *p64, | |
745 | struct compat_ipmi_recv __user *p32) | |
746 | { | |
747 | if (!access_ok(VERIFY_WRITE, p32, sizeof(*p32)) || | |
748 | __put_user(p64->recv_type, &p32->recv_type) || | |
749 | __put_user(p64->addr_len, &p32->addr_len) || | |
750 | __put_user(p64->msgid, &p32->msgid) || | |
751 | put_compat_ipmi_msg(&p64->msg, &p32->msg)) | |
752 | return -EFAULT; | |
753 | return 0; | |
754 | } | |
755 | ||
756 | /* | |
757 | * Handle compatibility ioctls | |
758 | */ | |
759 | static long compat_ipmi_ioctl(struct file *filep, unsigned int cmd, | |
760 | unsigned long arg) | |
761 | { | |
762 | int rc; | |
763 | struct ipmi_file_private *priv = filep->private_data; | |
764 | ||
765 | switch(cmd) { | |
766 | case COMPAT_IPMICTL_SEND_COMMAND: | |
767 | { | |
768 | struct ipmi_req rp; | |
769 | ||
770 | if (get_compat_ipmi_req(&rp, compat_ptr(arg))) | |
771 | return -EFAULT; | |
772 | ||
773 | return handle_send_req(priv->user, &rp, | |
774 | priv->default_retries, | |
775 | priv->default_retry_time_ms); | |
776 | } | |
777 | case COMPAT_IPMICTL_SEND_COMMAND_SETTIME: | |
778 | { | |
779 | struct ipmi_req_settime sp; | |
780 | ||
781 | if (get_compat_ipmi_req_settime(&sp, compat_ptr(arg))) | |
782 | return -EFAULT; | |
783 | ||
784 | return handle_send_req(priv->user, &sp.req, | |
785 | sp.retries, sp.retry_time_ms); | |
786 | } | |
787 | case COMPAT_IPMICTL_RECEIVE_MSG: | |
788 | case COMPAT_IPMICTL_RECEIVE_MSG_TRUNC: | |
789 | { | |
18fb9442 Z |
790 | struct ipmi_recv __user *precv64; |
791 | struct ipmi_recv recv64; | |
6a94f920 AM |
792 | |
793 | if (get_compat_ipmi_recv(&recv64, compat_ptr(arg))) | |
794 | return -EFAULT; | |
795 | ||
796 | precv64 = compat_alloc_user_space(sizeof(recv64)); | |
797 | if (copy_to_user(precv64, &recv64, sizeof(recv64))) | |
798 | return -EFAULT; | |
799 | ||
78088414 | 800 | rc = ipmi_ioctl(filep->f_path.dentry->d_inode, filep, |
6a94f920 AM |
801 | ((cmd == COMPAT_IPMICTL_RECEIVE_MSG) |
802 | ? IPMICTL_RECEIVE_MSG | |
803 | : IPMICTL_RECEIVE_MSG_TRUNC), | |
18fb9442 | 804 | (unsigned long) precv64); |
6a94f920 AM |
805 | if (rc != 0) |
806 | return rc; | |
807 | ||
808 | if (copy_from_user(&recv64, precv64, sizeof(recv64))) | |
809 | return -EFAULT; | |
810 | ||
811 | if (put_compat_ipmi_recv(&recv64, compat_ptr(arg))) | |
812 | return -EFAULT; | |
813 | ||
814 | return rc; | |
815 | } | |
816 | default: | |
78088414 | 817 | return ipmi_ioctl(filep->f_path.dentry->d_inode, filep, cmd, arg); |
6a94f920 AM |
818 | } |
819 | } | |
820 | #endif | |
1da177e4 | 821 | |
62322d25 | 822 | static const struct file_operations ipmi_fops = { |
1da177e4 LT |
823 | .owner = THIS_MODULE, |
824 | .ioctl = ipmi_ioctl, | |
6a94f920 AM |
825 | #ifdef CONFIG_COMPAT |
826 | .compat_ioctl = compat_ipmi_ioctl, | |
827 | #endif | |
1da177e4 LT |
828 | .open = ipmi_open, |
829 | .release = ipmi_release, | |
830 | .fasync = ipmi_fasync, | |
831 | .poll = ipmi_poll, | |
832 | }; | |
833 | ||
834 | #define DEVICE_NAME "ipmidev" | |
835 | ||
0c8204b3 | 836 | static int ipmi_major; |
1da177e4 LT |
837 | module_param(ipmi_major, int, 0); |
838 | MODULE_PARM_DESC(ipmi_major, "Sets the major number of the IPMI device. By" | |
839 | " default, or if you set it to zero, it will choose the next" | |
840 | " available device. Setting it to -1 will disable the" | |
841 | " interface. Other values will set the major device number" | |
842 | " to that value."); | |
843 | ||
50c812b2 CM |
844 | /* Keep track of the devices that are registered. */ |
845 | struct ipmi_reg_list { | |
846 | dev_t dev; | |
847 | struct list_head link; | |
848 | }; | |
849 | static LIST_HEAD(reg_list); | |
850 | static DEFINE_MUTEX(reg_list_mutex); | |
851 | ||
eb51b650 | 852 | static struct class *ipmi_class; |
37e0915b | 853 | |
50c812b2 | 854 | static void ipmi_new_smi(int if_num, struct device *device) |
1da177e4 | 855 | { |
37e0915b | 856 | dev_t dev = MKDEV(ipmi_major, if_num); |
50c812b2 | 857 | struct ipmi_reg_list *entry; |
37e0915b | 858 | |
50c812b2 CM |
859 | entry = kmalloc(sizeof(*entry), GFP_KERNEL); |
860 | if (!entry) { | |
861 | printk(KERN_ERR "ipmi_devintf: Unable to create the" | |
862 | " ipmi class device link\n"); | |
863 | return; | |
864 | } | |
865 | entry->dev = dev; | |
866 | ||
867 | mutex_lock(®_list_mutex); | |
868 | class_device_create(ipmi_class, NULL, dev, device, "ipmi%d", if_num); | |
869 | list_add(&entry->link, ®_list); | |
870 | mutex_unlock(®_list_mutex); | |
1da177e4 LT |
871 | } |
872 | ||
873 | static void ipmi_smi_gone(int if_num) | |
874 | { | |
50c812b2 CM |
875 | dev_t dev = MKDEV(ipmi_major, if_num); |
876 | struct ipmi_reg_list *entry; | |
877 | ||
878 | mutex_lock(®_list_mutex); | |
879 | list_for_each_entry(entry, ®_list, link) { | |
880 | if (entry->dev == dev) { | |
881 | list_del(&entry->link); | |
882 | kfree(entry); | |
883 | break; | |
884 | } | |
885 | } | |
886 | class_device_destroy(ipmi_class, dev); | |
887 | mutex_unlock(®_list_mutex); | |
1da177e4 LT |
888 | } |
889 | ||
890 | static struct ipmi_smi_watcher smi_watcher = | |
891 | { | |
892 | .owner = THIS_MODULE, | |
893 | .new_smi = ipmi_new_smi, | |
894 | .smi_gone = ipmi_smi_gone, | |
895 | }; | |
896 | ||
897 | static __init int init_ipmi_devintf(void) | |
898 | { | |
899 | int rv; | |
900 | ||
901 | if (ipmi_major < 0) | |
902 | return -EINVAL; | |
903 | ||
1fdd75bd | 904 | printk(KERN_INFO "ipmi device interface\n"); |
1da177e4 | 905 | |
eb51b650 | 906 | ipmi_class = class_create(THIS_MODULE, "ipmi"); |
37e0915b CM |
907 | if (IS_ERR(ipmi_class)) { |
908 | printk(KERN_ERR "ipmi: can't register device class\n"); | |
909 | return PTR_ERR(ipmi_class); | |
910 | } | |
911 | ||
1da177e4 LT |
912 | rv = register_chrdev(ipmi_major, DEVICE_NAME, &ipmi_fops); |
913 | if (rv < 0) { | |
eb51b650 | 914 | class_destroy(ipmi_class); |
1da177e4 LT |
915 | printk(KERN_ERR "ipmi: can't get major %d\n", ipmi_major); |
916 | return rv; | |
917 | } | |
918 | ||
919 | if (ipmi_major == 0) { | |
920 | ipmi_major = rv; | |
921 | } | |
922 | ||
1da177e4 LT |
923 | rv = ipmi_smi_watcher_register(&smi_watcher); |
924 | if (rv) { | |
925 | unregister_chrdev(ipmi_major, DEVICE_NAME); | |
eb51b650 | 926 | class_destroy(ipmi_class); |
1da177e4 LT |
927 | printk(KERN_WARNING "ipmi: can't register smi watcher\n"); |
928 | return rv; | |
929 | } | |
930 | ||
931 | return 0; | |
932 | } | |
933 | module_init(init_ipmi_devintf); | |
934 | ||
935 | static __exit void cleanup_ipmi(void) | |
936 | { | |
50c812b2 CM |
937 | struct ipmi_reg_list *entry, *entry2; |
938 | mutex_lock(®_list_mutex); | |
939 | list_for_each_entry_safe(entry, entry2, ®_list, link) { | |
940 | list_del(&entry->link); | |
941 | class_device_destroy(ipmi_class, entry->dev); | |
942 | kfree(entry); | |
943 | } | |
944 | mutex_unlock(®_list_mutex); | |
eb51b650 | 945 | class_destroy(ipmi_class); |
1da177e4 | 946 | ipmi_smi_watcher_unregister(&smi_watcher); |
1da177e4 LT |
947 | unregister_chrdev(ipmi_major, DEVICE_NAME); |
948 | } | |
949 | module_exit(cleanup_ipmi); | |
950 | ||
951 | MODULE_LICENSE("GPL"); | |
1fdd75bd CM |
952 | MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>"); |
953 | MODULE_DESCRIPTION("Linux device interface for the IPMI message handler."); |