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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> | |
1da177e4 | 37 | #include <linux/poll.h> |
a99bbaf5 | 38 | #include <linux/sched.h> |
1da177e4 LT |
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 | ||
609146fd | 60 | static DEFINE_MUTEX(ipmi_mutex); |
1da177e4 LT |
61 | static void file_receive_handler(struct ipmi_recv_msg *msg, |
62 | void *handler_data) | |
63 | { | |
64 | struct ipmi_file_private *priv = handler_data; | |
65 | int was_empty; | |
66 | unsigned long flags; | |
67 | ||
68 | spin_lock_irqsave(&(priv->recv_msg_lock), flags); | |
69 | ||
70 | was_empty = list_empty(&(priv->recv_msgs)); | |
71 | list_add_tail(&(msg->link), &(priv->recv_msgs)); | |
72 | ||
73 | if (was_empty) { | |
74 | wake_up_interruptible(&priv->wait); | |
75 | kill_fasync(&priv->fasync_queue, SIGIO, POLL_IN); | |
76 | } | |
77 | ||
78 | spin_unlock_irqrestore(&(priv->recv_msg_lock), flags); | |
79 | } | |
80 | ||
81 | static unsigned int ipmi_poll(struct file *file, poll_table *wait) | |
82 | { | |
83 | struct ipmi_file_private *priv = file->private_data; | |
84 | unsigned int mask = 0; | |
85 | unsigned long flags; | |
86 | ||
87 | poll_wait(file, &priv->wait, wait); | |
88 | ||
89 | spin_lock_irqsave(&priv->recv_msg_lock, flags); | |
90 | ||
50c812b2 | 91 | if (!list_empty(&(priv->recv_msgs))) |
1da177e4 LT |
92 | mask |= (POLLIN | POLLRDNORM); |
93 | ||
94 | spin_unlock_irqrestore(&priv->recv_msg_lock, flags); | |
95 | ||
96 | return mask; | |
97 | } | |
98 | ||
99 | static int ipmi_fasync(int fd, struct file *file, int on) | |
100 | { | |
101 | struct ipmi_file_private *priv = file->private_data; | |
102 | int result; | |
103 | ||
609146fd | 104 | mutex_lock(&ipmi_mutex); /* could race against open() otherwise */ |
1da177e4 | 105 | result = fasync_helper(fd, file, on, &priv->fasync_queue); |
609146fd | 106 | mutex_unlock(&ipmi_mutex); |
1da177e4 LT |
107 | |
108 | return (result); | |
109 | } | |
110 | ||
111 | static struct ipmi_user_hndl ipmi_hndlrs = | |
112 | { | |
113 | .ipmi_recv_hndl = file_receive_handler, | |
114 | }; | |
115 | ||
116 | static int ipmi_open(struct inode *inode, struct file *file) | |
117 | { | |
118 | int if_num = iminor(inode); | |
119 | int rv; | |
120 | struct ipmi_file_private *priv; | |
121 | ||
122 | ||
123 | priv = kmalloc(sizeof(*priv), GFP_KERNEL); | |
124 | if (!priv) | |
125 | return -ENOMEM; | |
126 | ||
609146fd | 127 | mutex_lock(&ipmi_mutex); |
1da177e4 LT |
128 | priv->file = file; |
129 | ||
130 | rv = ipmi_create_user(if_num, | |
131 | &ipmi_hndlrs, | |
132 | priv, | |
133 | &(priv->user)); | |
134 | if (rv) { | |
135 | kfree(priv); | |
ecc38983 | 136 | goto out; |
1da177e4 LT |
137 | } |
138 | ||
139 | file->private_data = priv; | |
140 | ||
141 | spin_lock_init(&(priv->recv_msg_lock)); | |
142 | INIT_LIST_HEAD(&(priv->recv_msgs)); | |
143 | init_waitqueue_head(&priv->wait); | |
144 | priv->fasync_queue = NULL; | |
d6dfd131 | 145 | mutex_init(&priv->recv_mutex); |
1da177e4 LT |
146 | |
147 | /* Use the low-level defaults. */ | |
148 | priv->default_retries = -1; | |
149 | priv->default_retry_time_ms = 0; | |
150 | ||
ecc38983 | 151 | out: |
609146fd | 152 | mutex_unlock(&ipmi_mutex); |
ecc38983 | 153 | return rv; |
1da177e4 LT |
154 | } |
155 | ||
156 | static int ipmi_release(struct inode *inode, struct file *file) | |
157 | { | |
158 | struct ipmi_file_private *priv = file->private_data; | |
159 | int rv; | |
160 | ||
161 | rv = ipmi_destroy_user(priv->user); | |
162 | if (rv) | |
163 | return rv; | |
164 | ||
1da177e4 LT |
165 | /* FIXME - free the messages in the list. */ |
166 | kfree(priv); | |
167 | ||
168 | return 0; | |
169 | } | |
170 | ||
171 | static int handle_send_req(ipmi_user_t user, | |
172 | struct ipmi_req *req, | |
173 | int retries, | |
174 | unsigned int retry_time_ms) | |
175 | { | |
176 | int rv; | |
177 | struct ipmi_addr addr; | |
178 | struct kernel_ipmi_msg msg; | |
179 | ||
180 | if (req->addr_len > sizeof(struct ipmi_addr)) | |
181 | return -EINVAL; | |
182 | ||
183 | if (copy_from_user(&addr, req->addr, req->addr_len)) | |
184 | return -EFAULT; | |
185 | ||
186 | msg.netfn = req->msg.netfn; | |
187 | msg.cmd = req->msg.cmd; | |
188 | msg.data_len = req->msg.data_len; | |
189 | msg.data = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL); | |
190 | if (!msg.data) | |
191 | return -ENOMEM; | |
192 | ||
193 | /* From here out we cannot return, we must jump to "out" for | |
194 | error exits to free msgdata. */ | |
195 | ||
196 | rv = ipmi_validate_addr(&addr, req->addr_len); | |
197 | if (rv) | |
198 | goto out; | |
199 | ||
200 | if (req->msg.data != NULL) { | |
201 | if (req->msg.data_len > IPMI_MAX_MSG_LENGTH) { | |
202 | rv = -EMSGSIZE; | |
203 | goto out; | |
204 | } | |
205 | ||
206 | if (copy_from_user(msg.data, | |
207 | req->msg.data, | |
208 | req->msg.data_len)) | |
209 | { | |
210 | rv = -EFAULT; | |
211 | goto out; | |
212 | } | |
213 | } else { | |
214 | msg.data_len = 0; | |
215 | } | |
216 | ||
217 | rv = ipmi_request_settime(user, | |
218 | &addr, | |
219 | req->msgid, | |
220 | &msg, | |
221 | NULL, | |
222 | 0, | |
223 | retries, | |
224 | retry_time_ms); | |
225 | out: | |
226 | kfree(msg.data); | |
227 | return rv; | |
228 | } | |
229 | ||
55929332 | 230 | static int ipmi_ioctl(struct file *file, |
1da177e4 LT |
231 | unsigned int cmd, |
232 | unsigned long data) | |
233 | { | |
234 | int rv = -EINVAL; | |
235 | struct ipmi_file_private *priv = file->private_data; | |
236 | void __user *arg = (void __user *)data; | |
237 | ||
238 | switch (cmd) | |
239 | { | |
240 | case IPMICTL_SEND_COMMAND: | |
241 | { | |
242 | struct ipmi_req req; | |
243 | ||
244 | if (copy_from_user(&req, arg, sizeof(req))) { | |
245 | rv = -EFAULT; | |
246 | break; | |
247 | } | |
248 | ||
249 | rv = handle_send_req(priv->user, | |
250 | &req, | |
251 | priv->default_retries, | |
252 | priv->default_retry_time_ms); | |
253 | break; | |
254 | } | |
255 | ||
256 | case IPMICTL_SEND_COMMAND_SETTIME: | |
257 | { | |
258 | struct ipmi_req_settime req; | |
259 | ||
260 | if (copy_from_user(&req, arg, sizeof(req))) { | |
261 | rv = -EFAULT; | |
262 | break; | |
263 | } | |
264 | ||
265 | rv = handle_send_req(priv->user, | |
266 | &req.req, | |
267 | req.retries, | |
268 | req.retry_time_ms); | |
269 | break; | |
270 | } | |
271 | ||
272 | case IPMICTL_RECEIVE_MSG: | |
273 | case IPMICTL_RECEIVE_MSG_TRUNC: | |
274 | { | |
275 | struct ipmi_recv rsp; | |
276 | int addr_len; | |
277 | struct list_head *entry; | |
278 | struct ipmi_recv_msg *msg; | |
279 | unsigned long flags; | |
280 | ||
281 | ||
282 | rv = 0; | |
283 | if (copy_from_user(&rsp, arg, sizeof(rsp))) { | |
284 | rv = -EFAULT; | |
285 | break; | |
286 | } | |
287 | ||
d6dfd131 | 288 | /* We claim a mutex because we don't want two |
1da177e4 LT |
289 | users getting something from the queue at a time. |
290 | Since we have to release the spinlock before we can | |
291 | copy the data to the user, it's possible another | |
292 | user will grab something from the queue, too. Then | |
293 | the messages might get out of order if something | |
294 | fails and the message gets put back onto the | |
d6dfd131 CM |
295 | queue. This mutex prevents that problem. */ |
296 | mutex_lock(&priv->recv_mutex); | |
1da177e4 LT |
297 | |
298 | /* Grab the message off the list. */ | |
299 | spin_lock_irqsave(&(priv->recv_msg_lock), flags); | |
300 | if (list_empty(&(priv->recv_msgs))) { | |
301 | spin_unlock_irqrestore(&(priv->recv_msg_lock), flags); | |
302 | rv = -EAGAIN; | |
303 | goto recv_err; | |
304 | } | |
305 | entry = priv->recv_msgs.next; | |
306 | msg = list_entry(entry, struct ipmi_recv_msg, link); | |
307 | list_del(entry); | |
308 | spin_unlock_irqrestore(&(priv->recv_msg_lock), flags); | |
309 | ||
310 | addr_len = ipmi_addr_length(msg->addr.addr_type); | |
311 | if (rsp.addr_len < addr_len) | |
312 | { | |
313 | rv = -EINVAL; | |
314 | goto recv_putback_on_err; | |
315 | } | |
316 | ||
317 | if (copy_to_user(rsp.addr, &(msg->addr), addr_len)) { | |
318 | rv = -EFAULT; | |
319 | goto recv_putback_on_err; | |
320 | } | |
321 | rsp.addr_len = addr_len; | |
322 | ||
323 | rsp.recv_type = msg->recv_type; | |
324 | rsp.msgid = msg->msgid; | |
325 | rsp.msg.netfn = msg->msg.netfn; | |
326 | rsp.msg.cmd = msg->msg.cmd; | |
327 | ||
328 | if (msg->msg.data_len > 0) { | |
329 | if (rsp.msg.data_len < msg->msg.data_len) { | |
330 | rv = -EMSGSIZE; | |
331 | if (cmd == IPMICTL_RECEIVE_MSG_TRUNC) { | |
332 | msg->msg.data_len = rsp.msg.data_len; | |
333 | } else { | |
334 | goto recv_putback_on_err; | |
335 | } | |
336 | } | |
337 | ||
338 | if (copy_to_user(rsp.msg.data, | |
339 | msg->msg.data, | |
340 | msg->msg.data_len)) | |
341 | { | |
342 | rv = -EFAULT; | |
343 | goto recv_putback_on_err; | |
344 | } | |
345 | rsp.msg.data_len = msg->msg.data_len; | |
346 | } else { | |
347 | rsp.msg.data_len = 0; | |
348 | } | |
349 | ||
350 | if (copy_to_user(arg, &rsp, sizeof(rsp))) { | |
351 | rv = -EFAULT; | |
352 | goto recv_putback_on_err; | |
353 | } | |
354 | ||
d6dfd131 | 355 | mutex_unlock(&priv->recv_mutex); |
1da177e4 LT |
356 | ipmi_free_recv_msg(msg); |
357 | break; | |
358 | ||
359 | recv_putback_on_err: | |
360 | /* If we got an error, put the message back onto | |
361 | the head of the queue. */ | |
362 | spin_lock_irqsave(&(priv->recv_msg_lock), flags); | |
363 | list_add(entry, &(priv->recv_msgs)); | |
364 | spin_unlock_irqrestore(&(priv->recv_msg_lock), flags); | |
d6dfd131 | 365 | mutex_unlock(&priv->recv_mutex); |
1da177e4 LT |
366 | break; |
367 | ||
368 | recv_err: | |
d6dfd131 | 369 | mutex_unlock(&priv->recv_mutex); |
1da177e4 LT |
370 | break; |
371 | } | |
372 | ||
373 | case IPMICTL_REGISTER_FOR_CMD: | |
374 | { | |
375 | struct ipmi_cmdspec val; | |
376 | ||
377 | if (copy_from_user(&val, arg, sizeof(val))) { | |
378 | rv = -EFAULT; | |
379 | break; | |
380 | } | |
381 | ||
c69c3127 CM |
382 | rv = ipmi_register_for_cmd(priv->user, val.netfn, val.cmd, |
383 | IPMI_CHAN_ALL); | |
1da177e4 LT |
384 | break; |
385 | } | |
386 | ||
387 | case IPMICTL_UNREGISTER_FOR_CMD: | |
388 | { | |
389 | struct ipmi_cmdspec val; | |
390 | ||
391 | if (copy_from_user(&val, arg, sizeof(val))) { | |
392 | rv = -EFAULT; | |
393 | break; | |
394 | } | |
395 | ||
c69c3127 CM |
396 | rv = ipmi_unregister_for_cmd(priv->user, val.netfn, val.cmd, |
397 | IPMI_CHAN_ALL); | |
398 | break; | |
399 | } | |
400 | ||
401 | case IPMICTL_REGISTER_FOR_CMD_CHANS: | |
402 | { | |
403 | struct ipmi_cmdspec_chans val; | |
404 | ||
405 | if (copy_from_user(&val, arg, sizeof(val))) { | |
406 | rv = -EFAULT; | |
407 | break; | |
408 | } | |
409 | ||
410 | rv = ipmi_register_for_cmd(priv->user, val.netfn, val.cmd, | |
411 | val.chans); | |
412 | break; | |
413 | } | |
414 | ||
415 | case IPMICTL_UNREGISTER_FOR_CMD_CHANS: | |
416 | { | |
417 | struct ipmi_cmdspec_chans val; | |
418 | ||
419 | if (copy_from_user(&val, arg, sizeof(val))) { | |
420 | rv = -EFAULT; | |
421 | break; | |
422 | } | |
423 | ||
424 | rv = ipmi_unregister_for_cmd(priv->user, val.netfn, val.cmd, | |
425 | val.chans); | |
1da177e4 LT |
426 | break; |
427 | } | |
428 | ||
429 | case IPMICTL_SET_GETS_EVENTS_CMD: | |
430 | { | |
431 | int val; | |
432 | ||
433 | if (copy_from_user(&val, arg, sizeof(val))) { | |
434 | rv = -EFAULT; | |
435 | break; | |
436 | } | |
437 | ||
438 | rv = ipmi_set_gets_events(priv->user, val); | |
439 | break; | |
440 | } | |
441 | ||
c14979b9 | 442 | /* The next four are legacy, not per-channel. */ |
1da177e4 LT |
443 | case IPMICTL_SET_MY_ADDRESS_CMD: |
444 | { | |
445 | unsigned int val; | |
446 | ||
447 | if (copy_from_user(&val, arg, sizeof(val))) { | |
448 | rv = -EFAULT; | |
449 | break; | |
450 | } | |
451 | ||
c14979b9 | 452 | rv = ipmi_set_my_address(priv->user, 0, val); |
1da177e4 LT |
453 | break; |
454 | } | |
455 | ||
456 | case IPMICTL_GET_MY_ADDRESS_CMD: | |
457 | { | |
c14979b9 CM |
458 | unsigned int val; |
459 | unsigned char rval; | |
460 | ||
461 | rv = ipmi_get_my_address(priv->user, 0, &rval); | |
462 | if (rv) | |
463 | break; | |
1da177e4 | 464 | |
c14979b9 | 465 | val = rval; |
1da177e4 LT |
466 | |
467 | if (copy_to_user(arg, &val, sizeof(val))) { | |
468 | rv = -EFAULT; | |
469 | break; | |
470 | } | |
1da177e4 LT |
471 | break; |
472 | } | |
473 | ||
474 | case IPMICTL_SET_MY_LUN_CMD: | |
475 | { | |
476 | unsigned int val; | |
477 | ||
478 | if (copy_from_user(&val, arg, sizeof(val))) { | |
479 | rv = -EFAULT; | |
480 | break; | |
481 | } | |
482 | ||
c14979b9 | 483 | rv = ipmi_set_my_LUN(priv->user, 0, val); |
1da177e4 LT |
484 | break; |
485 | } | |
486 | ||
487 | case IPMICTL_GET_MY_LUN_CMD: | |
488 | { | |
c14979b9 CM |
489 | unsigned int val; |
490 | unsigned char rval; | |
491 | ||
492 | rv = ipmi_get_my_LUN(priv->user, 0, &rval); | |
493 | if (rv) | |
494 | break; | |
1da177e4 | 495 | |
c14979b9 | 496 | val = rval; |
1da177e4 LT |
497 | |
498 | if (copy_to_user(arg, &val, sizeof(val))) { | |
499 | rv = -EFAULT; | |
500 | break; | |
501 | } | |
1da177e4 LT |
502 | break; |
503 | } | |
c14979b9 CM |
504 | |
505 | case IPMICTL_SET_MY_CHANNEL_ADDRESS_CMD: | |
506 | { | |
507 | struct ipmi_channel_lun_address_set val; | |
508 | ||
509 | if (copy_from_user(&val, arg, sizeof(val))) { | |
510 | rv = -EFAULT; | |
511 | break; | |
512 | } | |
513 | ||
514 | return ipmi_set_my_address(priv->user, val.channel, val.value); | |
515 | break; | |
516 | } | |
517 | ||
518 | case IPMICTL_GET_MY_CHANNEL_ADDRESS_CMD: | |
519 | { | |
520 | struct ipmi_channel_lun_address_set val; | |
521 | ||
522 | if (copy_from_user(&val, arg, sizeof(val))) { | |
523 | rv = -EFAULT; | |
524 | break; | |
525 | } | |
526 | ||
527 | rv = ipmi_get_my_address(priv->user, val.channel, &val.value); | |
528 | if (rv) | |
529 | break; | |
530 | ||
531 | if (copy_to_user(arg, &val, sizeof(val))) { | |
532 | rv = -EFAULT; | |
533 | break; | |
534 | } | |
535 | break; | |
536 | } | |
537 | ||
538 | case IPMICTL_SET_MY_CHANNEL_LUN_CMD: | |
539 | { | |
540 | struct ipmi_channel_lun_address_set val; | |
541 | ||
542 | if (copy_from_user(&val, arg, sizeof(val))) { | |
543 | rv = -EFAULT; | |
544 | break; | |
545 | } | |
546 | ||
547 | rv = ipmi_set_my_LUN(priv->user, val.channel, val.value); | |
548 | break; | |
549 | } | |
550 | ||
551 | case IPMICTL_GET_MY_CHANNEL_LUN_CMD: | |
552 | { | |
553 | struct ipmi_channel_lun_address_set val; | |
554 | ||
555 | if (copy_from_user(&val, arg, sizeof(val))) { | |
556 | rv = -EFAULT; | |
557 | break; | |
558 | } | |
559 | ||
560 | rv = ipmi_get_my_LUN(priv->user, val.channel, &val.value); | |
561 | if (rv) | |
562 | break; | |
563 | ||
564 | if (copy_to_user(arg, &val, sizeof(val))) { | |
565 | rv = -EFAULT; | |
566 | break; | |
567 | } | |
568 | break; | |
569 | } | |
570 | ||
1da177e4 LT |
571 | case IPMICTL_SET_TIMING_PARMS_CMD: |
572 | { | |
573 | struct ipmi_timing_parms parms; | |
574 | ||
575 | if (copy_from_user(&parms, arg, sizeof(parms))) { | |
576 | rv = -EFAULT; | |
577 | break; | |
578 | } | |
579 | ||
580 | priv->default_retries = parms.retries; | |
581 | priv->default_retry_time_ms = parms.retry_time_ms; | |
582 | rv = 0; | |
583 | break; | |
584 | } | |
585 | ||
586 | case IPMICTL_GET_TIMING_PARMS_CMD: | |
587 | { | |
588 | struct ipmi_timing_parms parms; | |
589 | ||
590 | parms.retries = priv->default_retries; | |
591 | parms.retry_time_ms = priv->default_retry_time_ms; | |
592 | ||
593 | if (copy_to_user(arg, &parms, sizeof(parms))) { | |
594 | rv = -EFAULT; | |
595 | break; | |
596 | } | |
597 | ||
598 | rv = 0; | |
599 | break; | |
600 | } | |
b9675136 CM |
601 | |
602 | case IPMICTL_GET_MAINTENANCE_MODE_CMD: | |
603 | { | |
604 | int mode; | |
605 | ||
606 | mode = ipmi_get_maintenance_mode(priv->user); | |
607 | if (copy_to_user(arg, &mode, sizeof(mode))) { | |
608 | rv = -EFAULT; | |
609 | break; | |
610 | } | |
611 | rv = 0; | |
612 | break; | |
613 | } | |
614 | ||
615 | case IPMICTL_SET_MAINTENANCE_MODE_CMD: | |
616 | { | |
617 | int mode; | |
618 | ||
619 | if (copy_from_user(&mode, arg, sizeof(mode))) { | |
620 | rv = -EFAULT; | |
621 | break; | |
622 | } | |
623 | rv = ipmi_set_maintenance_mode(priv->user, mode); | |
624 | break; | |
625 | } | |
1da177e4 LT |
626 | } |
627 | ||
628 | return rv; | |
629 | } | |
630 | ||
55929332 AB |
631 | /* |
632 | * Note: it doesn't make sense to take the BKL here but | |
633 | * not in compat_ipmi_ioctl. -arnd | |
634 | */ | |
635 | static long ipmi_unlocked_ioctl(struct file *file, | |
636 | unsigned int cmd, | |
637 | unsigned long data) | |
638 | { | |
639 | int ret; | |
640 | ||
609146fd | 641 | mutex_lock(&ipmi_mutex); |
55929332 | 642 | ret = ipmi_ioctl(file, cmd, data); |
609146fd | 643 | mutex_unlock(&ipmi_mutex); |
55929332 AB |
644 | |
645 | return ret; | |
646 | } | |
647 | ||
6a94f920 AM |
648 | #ifdef CONFIG_COMPAT |
649 | ||
650 | /* | |
651 | * The following code contains code for supporting 32-bit compatible | |
652 | * ioctls on 64-bit kernels. This allows running 32-bit apps on the | |
653 | * 64-bit kernel | |
654 | */ | |
655 | #define COMPAT_IPMICTL_SEND_COMMAND \ | |
656 | _IOR(IPMI_IOC_MAGIC, 13, struct compat_ipmi_req) | |
657 | #define COMPAT_IPMICTL_SEND_COMMAND_SETTIME \ | |
658 | _IOR(IPMI_IOC_MAGIC, 21, struct compat_ipmi_req_settime) | |
659 | #define COMPAT_IPMICTL_RECEIVE_MSG \ | |
660 | _IOWR(IPMI_IOC_MAGIC, 12, struct compat_ipmi_recv) | |
661 | #define COMPAT_IPMICTL_RECEIVE_MSG_TRUNC \ | |
662 | _IOWR(IPMI_IOC_MAGIC, 11, struct compat_ipmi_recv) | |
663 | ||
664 | struct compat_ipmi_msg { | |
665 | u8 netfn; | |
666 | u8 cmd; | |
667 | u16 data_len; | |
668 | compat_uptr_t data; | |
669 | }; | |
670 | ||
671 | struct compat_ipmi_req { | |
672 | compat_uptr_t addr; | |
673 | compat_uint_t addr_len; | |
674 | compat_long_t msgid; | |
675 | struct compat_ipmi_msg msg; | |
676 | }; | |
677 | ||
678 | struct compat_ipmi_recv { | |
679 | compat_int_t recv_type; | |
680 | compat_uptr_t addr; | |
681 | compat_uint_t addr_len; | |
682 | compat_long_t msgid; | |
683 | struct compat_ipmi_msg msg; | |
684 | }; | |
685 | ||
686 | struct compat_ipmi_req_settime { | |
687 | struct compat_ipmi_req req; | |
688 | compat_int_t retries; | |
689 | compat_uint_t retry_time_ms; | |
690 | }; | |
691 | ||
692 | /* | |
693 | * Define some helper functions for copying IPMI data | |
694 | */ | |
695 | static long get_compat_ipmi_msg(struct ipmi_msg *p64, | |
696 | struct compat_ipmi_msg __user *p32) | |
697 | { | |
698 | compat_uptr_t tmp; | |
699 | ||
700 | if (!access_ok(VERIFY_READ, p32, sizeof(*p32)) || | |
701 | __get_user(p64->netfn, &p32->netfn) || | |
702 | __get_user(p64->cmd, &p32->cmd) || | |
703 | __get_user(p64->data_len, &p32->data_len) || | |
704 | __get_user(tmp, &p32->data)) | |
705 | return -EFAULT; | |
706 | p64->data = compat_ptr(tmp); | |
707 | return 0; | |
708 | } | |
709 | ||
710 | static long put_compat_ipmi_msg(struct ipmi_msg *p64, | |
711 | struct compat_ipmi_msg __user *p32) | |
712 | { | |
713 | if (!access_ok(VERIFY_WRITE, p32, sizeof(*p32)) || | |
714 | __put_user(p64->netfn, &p32->netfn) || | |
715 | __put_user(p64->cmd, &p32->cmd) || | |
716 | __put_user(p64->data_len, &p32->data_len)) | |
717 | return -EFAULT; | |
718 | return 0; | |
719 | } | |
720 | ||
721 | static long get_compat_ipmi_req(struct ipmi_req *p64, | |
722 | struct compat_ipmi_req __user *p32) | |
723 | { | |
724 | ||
725 | compat_uptr_t tmp; | |
726 | ||
727 | if (!access_ok(VERIFY_READ, p32, sizeof(*p32)) || | |
728 | __get_user(tmp, &p32->addr) || | |
729 | __get_user(p64->addr_len, &p32->addr_len) || | |
730 | __get_user(p64->msgid, &p32->msgid) || | |
731 | get_compat_ipmi_msg(&p64->msg, &p32->msg)) | |
732 | return -EFAULT; | |
733 | p64->addr = compat_ptr(tmp); | |
734 | return 0; | |
735 | } | |
736 | ||
737 | static long get_compat_ipmi_req_settime(struct ipmi_req_settime *p64, | |
738 | struct compat_ipmi_req_settime __user *p32) | |
739 | { | |
740 | if (!access_ok(VERIFY_READ, p32, sizeof(*p32)) || | |
741 | get_compat_ipmi_req(&p64->req, &p32->req) || | |
742 | __get_user(p64->retries, &p32->retries) || | |
743 | __get_user(p64->retry_time_ms, &p32->retry_time_ms)) | |
744 | return -EFAULT; | |
745 | return 0; | |
746 | } | |
747 | ||
748 | static long get_compat_ipmi_recv(struct ipmi_recv *p64, | |
749 | struct compat_ipmi_recv __user *p32) | |
750 | { | |
751 | compat_uptr_t tmp; | |
752 | ||
753 | if (!access_ok(VERIFY_READ, p32, sizeof(*p32)) || | |
754 | __get_user(p64->recv_type, &p32->recv_type) || | |
755 | __get_user(tmp, &p32->addr) || | |
756 | __get_user(p64->addr_len, &p32->addr_len) || | |
757 | __get_user(p64->msgid, &p32->msgid) || | |
758 | get_compat_ipmi_msg(&p64->msg, &p32->msg)) | |
759 | return -EFAULT; | |
760 | p64->addr = compat_ptr(tmp); | |
761 | return 0; | |
762 | } | |
763 | ||
764 | static long put_compat_ipmi_recv(struct ipmi_recv *p64, | |
765 | struct compat_ipmi_recv __user *p32) | |
766 | { | |
767 | if (!access_ok(VERIFY_WRITE, p32, sizeof(*p32)) || | |
768 | __put_user(p64->recv_type, &p32->recv_type) || | |
769 | __put_user(p64->addr_len, &p32->addr_len) || | |
770 | __put_user(p64->msgid, &p32->msgid) || | |
771 | put_compat_ipmi_msg(&p64->msg, &p32->msg)) | |
772 | return -EFAULT; | |
773 | return 0; | |
774 | } | |
775 | ||
776 | /* | |
777 | * Handle compatibility ioctls | |
778 | */ | |
779 | static long compat_ipmi_ioctl(struct file *filep, unsigned int cmd, | |
780 | unsigned long arg) | |
781 | { | |
782 | int rc; | |
783 | struct ipmi_file_private *priv = filep->private_data; | |
784 | ||
785 | switch(cmd) { | |
786 | case COMPAT_IPMICTL_SEND_COMMAND: | |
787 | { | |
788 | struct ipmi_req rp; | |
789 | ||
790 | if (get_compat_ipmi_req(&rp, compat_ptr(arg))) | |
791 | return -EFAULT; | |
792 | ||
793 | return handle_send_req(priv->user, &rp, | |
794 | priv->default_retries, | |
795 | priv->default_retry_time_ms); | |
796 | } | |
797 | case COMPAT_IPMICTL_SEND_COMMAND_SETTIME: | |
798 | { | |
799 | struct ipmi_req_settime sp; | |
800 | ||
801 | if (get_compat_ipmi_req_settime(&sp, compat_ptr(arg))) | |
802 | return -EFAULT; | |
803 | ||
804 | return handle_send_req(priv->user, &sp.req, | |
805 | sp.retries, sp.retry_time_ms); | |
806 | } | |
807 | case COMPAT_IPMICTL_RECEIVE_MSG: | |
808 | case COMPAT_IPMICTL_RECEIVE_MSG_TRUNC: | |
809 | { | |
18fb9442 AV |
810 | struct ipmi_recv __user *precv64; |
811 | struct ipmi_recv recv64; | |
6a94f920 AM |
812 | |
813 | if (get_compat_ipmi_recv(&recv64, compat_ptr(arg))) | |
814 | return -EFAULT; | |
815 | ||
816 | precv64 = compat_alloc_user_space(sizeof(recv64)); | |
817 | if (copy_to_user(precv64, &recv64, sizeof(recv64))) | |
818 | return -EFAULT; | |
819 | ||
55929332 | 820 | rc = ipmi_ioctl(filep, |
6a94f920 AM |
821 | ((cmd == COMPAT_IPMICTL_RECEIVE_MSG) |
822 | ? IPMICTL_RECEIVE_MSG | |
823 | : IPMICTL_RECEIVE_MSG_TRUNC), | |
18fb9442 | 824 | (unsigned long) precv64); |
6a94f920 AM |
825 | if (rc != 0) |
826 | return rc; | |
827 | ||
828 | if (copy_from_user(&recv64, precv64, sizeof(recv64))) | |
829 | return -EFAULT; | |
830 | ||
831 | if (put_compat_ipmi_recv(&recv64, compat_ptr(arg))) | |
832 | return -EFAULT; | |
833 | ||
834 | return rc; | |
835 | } | |
836 | default: | |
55929332 | 837 | return ipmi_ioctl(filep, cmd, arg); |
6a94f920 AM |
838 | } |
839 | } | |
6368087e BL |
840 | |
841 | static long unlocked_compat_ipmi_ioctl(struct file *filep, unsigned int cmd, | |
842 | unsigned long arg) | |
843 | { | |
844 | int ret; | |
845 | ||
846 | mutex_lock(&ipmi_mutex); | |
847 | ret = compat_ipmi_ioctl(filep, cmd, arg); | |
848 | mutex_unlock(&ipmi_mutex); | |
849 | ||
850 | return ret; | |
851 | } | |
6a94f920 | 852 | #endif |
1da177e4 | 853 | |
62322d25 | 854 | static const struct file_operations ipmi_fops = { |
1da177e4 | 855 | .owner = THIS_MODULE, |
55929332 | 856 | .unlocked_ioctl = ipmi_unlocked_ioctl, |
6a94f920 | 857 | #ifdef CONFIG_COMPAT |
6368087e | 858 | .compat_ioctl = unlocked_compat_ipmi_ioctl, |
6a94f920 | 859 | #endif |
1da177e4 LT |
860 | .open = ipmi_open, |
861 | .release = ipmi_release, | |
862 | .fasync = ipmi_fasync, | |
863 | .poll = ipmi_poll, | |
6038f373 | 864 | .llseek = noop_llseek, |
1da177e4 LT |
865 | }; |
866 | ||
867 | #define DEVICE_NAME "ipmidev" | |
868 | ||
0c8204b3 | 869 | static int ipmi_major; |
1da177e4 LT |
870 | module_param(ipmi_major, int, 0); |
871 | MODULE_PARM_DESC(ipmi_major, "Sets the major number of the IPMI device. By" | |
872 | " default, or if you set it to zero, it will choose the next" | |
873 | " available device. Setting it to -1 will disable the" | |
874 | " interface. Other values will set the major device number" | |
875 | " to that value."); | |
876 | ||
50c812b2 CM |
877 | /* Keep track of the devices that are registered. */ |
878 | struct ipmi_reg_list { | |
879 | dev_t dev; | |
880 | struct list_head link; | |
881 | }; | |
882 | static LIST_HEAD(reg_list); | |
883 | static DEFINE_MUTEX(reg_list_mutex); | |
884 | ||
eb51b650 | 885 | static struct class *ipmi_class; |
37e0915b | 886 | |
50c812b2 | 887 | static void ipmi_new_smi(int if_num, struct device *device) |
1da177e4 | 888 | { |
37e0915b | 889 | dev_t dev = MKDEV(ipmi_major, if_num); |
50c812b2 | 890 | struct ipmi_reg_list *entry; |
37e0915b | 891 | |
50c812b2 CM |
892 | entry = kmalloc(sizeof(*entry), GFP_KERNEL); |
893 | if (!entry) { | |
894 | printk(KERN_ERR "ipmi_devintf: Unable to create the" | |
895 | " ipmi class device link\n"); | |
896 | return; | |
897 | } | |
898 | entry->dev = dev; | |
899 | ||
900 | mutex_lock(®_list_mutex); | |
03457cd4 | 901 | device_create(ipmi_class, device, dev, NULL, "ipmi%d", if_num); |
50c812b2 CM |
902 | list_add(&entry->link, ®_list); |
903 | mutex_unlock(®_list_mutex); | |
1da177e4 LT |
904 | } |
905 | ||
906 | static void ipmi_smi_gone(int if_num) | |
907 | { | |
50c812b2 CM |
908 | dev_t dev = MKDEV(ipmi_major, if_num); |
909 | struct ipmi_reg_list *entry; | |
910 | ||
911 | mutex_lock(®_list_mutex); | |
912 | list_for_each_entry(entry, ®_list, link) { | |
913 | if (entry->dev == dev) { | |
914 | list_del(&entry->link); | |
915 | kfree(entry); | |
916 | break; | |
917 | } | |
918 | } | |
07c015e7 | 919 | device_destroy(ipmi_class, dev); |
50c812b2 | 920 | mutex_unlock(®_list_mutex); |
1da177e4 LT |
921 | } |
922 | ||
923 | static struct ipmi_smi_watcher smi_watcher = | |
924 | { | |
925 | .owner = THIS_MODULE, | |
926 | .new_smi = ipmi_new_smi, | |
927 | .smi_gone = ipmi_smi_gone, | |
928 | }; | |
929 | ||
60ee6d5f | 930 | static int __init init_ipmi_devintf(void) |
1da177e4 LT |
931 | { |
932 | int rv; | |
933 | ||
934 | if (ipmi_major < 0) | |
935 | return -EINVAL; | |
936 | ||
1fdd75bd | 937 | printk(KERN_INFO "ipmi device interface\n"); |
1da177e4 | 938 | |
eb51b650 | 939 | ipmi_class = class_create(THIS_MODULE, "ipmi"); |
37e0915b CM |
940 | if (IS_ERR(ipmi_class)) { |
941 | printk(KERN_ERR "ipmi: can't register device class\n"); | |
942 | return PTR_ERR(ipmi_class); | |
943 | } | |
944 | ||
1da177e4 LT |
945 | rv = register_chrdev(ipmi_major, DEVICE_NAME, &ipmi_fops); |
946 | if (rv < 0) { | |
eb51b650 | 947 | class_destroy(ipmi_class); |
1da177e4 LT |
948 | printk(KERN_ERR "ipmi: can't get major %d\n", ipmi_major); |
949 | return rv; | |
950 | } | |
951 | ||
952 | if (ipmi_major == 0) { | |
953 | ipmi_major = rv; | |
954 | } | |
955 | ||
1da177e4 LT |
956 | rv = ipmi_smi_watcher_register(&smi_watcher); |
957 | if (rv) { | |
958 | unregister_chrdev(ipmi_major, DEVICE_NAME); | |
eb51b650 | 959 | class_destroy(ipmi_class); |
1da177e4 LT |
960 | printk(KERN_WARNING "ipmi: can't register smi watcher\n"); |
961 | return rv; | |
962 | } | |
963 | ||
964 | return 0; | |
965 | } | |
966 | module_init(init_ipmi_devintf); | |
967 | ||
60ee6d5f | 968 | static void __exit cleanup_ipmi(void) |
1da177e4 | 969 | { |
50c812b2 CM |
970 | struct ipmi_reg_list *entry, *entry2; |
971 | mutex_lock(®_list_mutex); | |
972 | list_for_each_entry_safe(entry, entry2, ®_list, link) { | |
973 | list_del(&entry->link); | |
07c015e7 | 974 | device_destroy(ipmi_class, entry->dev); |
50c812b2 CM |
975 | kfree(entry); |
976 | } | |
977 | mutex_unlock(®_list_mutex); | |
eb51b650 | 978 | class_destroy(ipmi_class); |
1da177e4 | 979 | ipmi_smi_watcher_unregister(&smi_watcher); |
1da177e4 LT |
980 | unregister_chrdev(ipmi_major, DEVICE_NAME); |
981 | } | |
982 | module_exit(cleanup_ipmi); | |
983 | ||
984 | MODULE_LICENSE("GPL"); | |
1fdd75bd CM |
985 | MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>"); |
986 | MODULE_DESCRIPTION("Linux device interface for the IPMI message handler."); | |
6c89161b | 987 | MODULE_ALIAS("platform:ipmi_si"); |