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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 | 38 | #include <linux/poll.h> |
a99bbaf5 | 39 | #include <linux/sched.h> |
1da177e4 LT |
40 | #include <linux/spinlock.h> |
41 | #include <linux/slab.h> | |
1da177e4 | 42 | #include <linux/ipmi.h> |
d6dfd131 | 43 | #include <linux/mutex.h> |
1da177e4 | 44 | #include <linux/init.h> |
37e0915b | 45 | #include <linux/device.h> |
6a94f920 | 46 | #include <linux/compat.h> |
ecc38983 | 47 | #include <linux/smp_lock.h> |
1da177e4 | 48 | |
1da177e4 LT |
49 | struct ipmi_file_private |
50 | { | |
51 | ipmi_user_t user; | |
52 | spinlock_t recv_msg_lock; | |
53 | struct list_head recv_msgs; | |
54 | struct file *file; | |
55 | struct fasync_struct *fasync_queue; | |
56 | wait_queue_head_t wait; | |
d6dfd131 | 57 | struct mutex recv_mutex; |
1da177e4 LT |
58 | int default_retries; |
59 | unsigned int default_retry_time_ms; | |
60 | }; | |
61 | ||
62 | static void file_receive_handler(struct ipmi_recv_msg *msg, | |
63 | void *handler_data) | |
64 | { | |
65 | struct ipmi_file_private *priv = handler_data; | |
66 | int was_empty; | |
67 | unsigned long flags; | |
68 | ||
69 | spin_lock_irqsave(&(priv->recv_msg_lock), flags); | |
70 | ||
71 | was_empty = list_empty(&(priv->recv_msgs)); | |
72 | list_add_tail(&(msg->link), &(priv->recv_msgs)); | |
73 | ||
74 | if (was_empty) { | |
75 | wake_up_interruptible(&priv->wait); | |
76 | kill_fasync(&priv->fasync_queue, SIGIO, POLL_IN); | |
77 | } | |
78 | ||
79 | spin_unlock_irqrestore(&(priv->recv_msg_lock), flags); | |
80 | } | |
81 | ||
82 | static unsigned int ipmi_poll(struct file *file, poll_table *wait) | |
83 | { | |
84 | struct ipmi_file_private *priv = file->private_data; | |
85 | unsigned int mask = 0; | |
86 | unsigned long flags; | |
87 | ||
88 | poll_wait(file, &priv->wait, wait); | |
89 | ||
90 | spin_lock_irqsave(&priv->recv_msg_lock, flags); | |
91 | ||
50c812b2 | 92 | if (!list_empty(&(priv->recv_msgs))) |
1da177e4 LT |
93 | mask |= (POLLIN | POLLRDNORM); |
94 | ||
95 | spin_unlock_irqrestore(&priv->recv_msg_lock, flags); | |
96 | ||
97 | return mask; | |
98 | } | |
99 | ||
100 | static int ipmi_fasync(int fd, struct file *file, int on) | |
101 | { | |
102 | struct ipmi_file_private *priv = file->private_data; | |
103 | int result; | |
104 | ||
70b028b7 | 105 | lock_kernel(); /* could race against open() otherwise */ |
1da177e4 | 106 | result = fasync_helper(fd, file, on, &priv->fasync_queue); |
70b028b7 | 107 | unlock_kernel(); |
1da177e4 LT |
108 | |
109 | return (result); | |
110 | } | |
111 | ||
112 | static struct ipmi_user_hndl ipmi_hndlrs = | |
113 | { | |
114 | .ipmi_recv_hndl = file_receive_handler, | |
115 | }; | |
116 | ||
117 | static int ipmi_open(struct inode *inode, struct file *file) | |
118 | { | |
119 | int if_num = iminor(inode); | |
120 | int rv; | |
121 | struct ipmi_file_private *priv; | |
122 | ||
123 | ||
124 | priv = kmalloc(sizeof(*priv), GFP_KERNEL); | |
125 | if (!priv) | |
126 | return -ENOMEM; | |
127 | ||
ecc38983 | 128 | lock_kernel(); |
1da177e4 LT |
129 | priv->file = file; |
130 | ||
131 | rv = ipmi_create_user(if_num, | |
132 | &ipmi_hndlrs, | |
133 | priv, | |
134 | &(priv->user)); | |
135 | if (rv) { | |
136 | kfree(priv); | |
ecc38983 | 137 | goto out; |
1da177e4 LT |
138 | } |
139 | ||
140 | file->private_data = priv; | |
141 | ||
142 | spin_lock_init(&(priv->recv_msg_lock)); | |
143 | INIT_LIST_HEAD(&(priv->recv_msgs)); | |
144 | init_waitqueue_head(&priv->wait); | |
145 | priv->fasync_queue = NULL; | |
d6dfd131 | 146 | mutex_init(&priv->recv_mutex); |
1da177e4 LT |
147 | |
148 | /* Use the low-level defaults. */ | |
149 | priv->default_retries = -1; | |
150 | priv->default_retry_time_ms = 0; | |
151 | ||
ecc38983 JC |
152 | out: |
153 | unlock_kernel(); | |
154 | return rv; | |
1da177e4 LT |
155 | } |
156 | ||
157 | static int ipmi_release(struct inode *inode, struct file *file) | |
158 | { | |
159 | struct ipmi_file_private *priv = file->private_data; | |
160 | int rv; | |
161 | ||
162 | rv = ipmi_destroy_user(priv->user); | |
163 | if (rv) | |
164 | return rv; | |
165 | ||
1da177e4 LT |
166 | /* FIXME - free the messages in the list. */ |
167 | kfree(priv); | |
168 | ||
169 | return 0; | |
170 | } | |
171 | ||
172 | static int handle_send_req(ipmi_user_t user, | |
173 | struct ipmi_req *req, | |
174 | int retries, | |
175 | unsigned int retry_time_ms) | |
176 | { | |
177 | int rv; | |
178 | struct ipmi_addr addr; | |
179 | struct kernel_ipmi_msg msg; | |
180 | ||
181 | if (req->addr_len > sizeof(struct ipmi_addr)) | |
182 | return -EINVAL; | |
183 | ||
184 | if (copy_from_user(&addr, req->addr, req->addr_len)) | |
185 | return -EFAULT; | |
186 | ||
187 | msg.netfn = req->msg.netfn; | |
188 | msg.cmd = req->msg.cmd; | |
189 | msg.data_len = req->msg.data_len; | |
190 | msg.data = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL); | |
191 | if (!msg.data) | |
192 | return -ENOMEM; | |
193 | ||
194 | /* From here out we cannot return, we must jump to "out" for | |
195 | error exits to free msgdata. */ | |
196 | ||
197 | rv = ipmi_validate_addr(&addr, req->addr_len); | |
198 | if (rv) | |
199 | goto out; | |
200 | ||
201 | if (req->msg.data != NULL) { | |
202 | if (req->msg.data_len > IPMI_MAX_MSG_LENGTH) { | |
203 | rv = -EMSGSIZE; | |
204 | goto out; | |
205 | } | |
206 | ||
207 | if (copy_from_user(msg.data, | |
208 | req->msg.data, | |
209 | req->msg.data_len)) | |
210 | { | |
211 | rv = -EFAULT; | |
212 | goto out; | |
213 | } | |
214 | } else { | |
215 | msg.data_len = 0; | |
216 | } | |
217 | ||
218 | rv = ipmi_request_settime(user, | |
219 | &addr, | |
220 | req->msgid, | |
221 | &msg, | |
222 | NULL, | |
223 | 0, | |
224 | retries, | |
225 | retry_time_ms); | |
226 | out: | |
227 | kfree(msg.data); | |
228 | return rv; | |
229 | } | |
230 | ||
55929332 | 231 | static int ipmi_ioctl(struct file *file, |
1da177e4 LT |
232 | unsigned int cmd, |
233 | unsigned long data) | |
234 | { | |
235 | int rv = -EINVAL; | |
236 | struct ipmi_file_private *priv = file->private_data; | |
237 | void __user *arg = (void __user *)data; | |
238 | ||
239 | switch (cmd) | |
240 | { | |
241 | case IPMICTL_SEND_COMMAND: | |
242 | { | |
243 | struct ipmi_req req; | |
244 | ||
245 | if (copy_from_user(&req, arg, sizeof(req))) { | |
246 | rv = -EFAULT; | |
247 | break; | |
248 | } | |
249 | ||
250 | rv = handle_send_req(priv->user, | |
251 | &req, | |
252 | priv->default_retries, | |
253 | priv->default_retry_time_ms); | |
254 | break; | |
255 | } | |
256 | ||
257 | case IPMICTL_SEND_COMMAND_SETTIME: | |
258 | { | |
259 | struct ipmi_req_settime req; | |
260 | ||
261 | if (copy_from_user(&req, arg, sizeof(req))) { | |
262 | rv = -EFAULT; | |
263 | break; | |
264 | } | |
265 | ||
266 | rv = handle_send_req(priv->user, | |
267 | &req.req, | |
268 | req.retries, | |
269 | req.retry_time_ms); | |
270 | break; | |
271 | } | |
272 | ||
273 | case IPMICTL_RECEIVE_MSG: | |
274 | case IPMICTL_RECEIVE_MSG_TRUNC: | |
275 | { | |
276 | struct ipmi_recv rsp; | |
277 | int addr_len; | |
278 | struct list_head *entry; | |
279 | struct ipmi_recv_msg *msg; | |
280 | unsigned long flags; | |
281 | ||
282 | ||
283 | rv = 0; | |
284 | if (copy_from_user(&rsp, arg, sizeof(rsp))) { | |
285 | rv = -EFAULT; | |
286 | break; | |
287 | } | |
288 | ||
d6dfd131 | 289 | /* We claim a mutex because we don't want two |
1da177e4 LT |
290 | users getting something from the queue at a time. |
291 | Since we have to release the spinlock before we can | |
292 | copy the data to the user, it's possible another | |
293 | user will grab something from the queue, too. Then | |
294 | the messages might get out of order if something | |
295 | fails and the message gets put back onto the | |
d6dfd131 CM |
296 | queue. This mutex prevents that problem. */ |
297 | mutex_lock(&priv->recv_mutex); | |
1da177e4 LT |
298 | |
299 | /* Grab the message off the list. */ | |
300 | spin_lock_irqsave(&(priv->recv_msg_lock), flags); | |
301 | if (list_empty(&(priv->recv_msgs))) { | |
302 | spin_unlock_irqrestore(&(priv->recv_msg_lock), flags); | |
303 | rv = -EAGAIN; | |
304 | goto recv_err; | |
305 | } | |
306 | entry = priv->recv_msgs.next; | |
307 | msg = list_entry(entry, struct ipmi_recv_msg, link); | |
308 | list_del(entry); | |
309 | spin_unlock_irqrestore(&(priv->recv_msg_lock), flags); | |
310 | ||
311 | addr_len = ipmi_addr_length(msg->addr.addr_type); | |
312 | if (rsp.addr_len < addr_len) | |
313 | { | |
314 | rv = -EINVAL; | |
315 | goto recv_putback_on_err; | |
316 | } | |
317 | ||
318 | if (copy_to_user(rsp.addr, &(msg->addr), addr_len)) { | |
319 | rv = -EFAULT; | |
320 | goto recv_putback_on_err; | |
321 | } | |
322 | rsp.addr_len = addr_len; | |
323 | ||
324 | rsp.recv_type = msg->recv_type; | |
325 | rsp.msgid = msg->msgid; | |
326 | rsp.msg.netfn = msg->msg.netfn; | |
327 | rsp.msg.cmd = msg->msg.cmd; | |
328 | ||
329 | if (msg->msg.data_len > 0) { | |
330 | if (rsp.msg.data_len < msg->msg.data_len) { | |
331 | rv = -EMSGSIZE; | |
332 | if (cmd == IPMICTL_RECEIVE_MSG_TRUNC) { | |
333 | msg->msg.data_len = rsp.msg.data_len; | |
334 | } else { | |
335 | goto recv_putback_on_err; | |
336 | } | |
337 | } | |
338 | ||
339 | if (copy_to_user(rsp.msg.data, | |
340 | msg->msg.data, | |
341 | msg->msg.data_len)) | |
342 | { | |
343 | rv = -EFAULT; | |
344 | goto recv_putback_on_err; | |
345 | } | |
346 | rsp.msg.data_len = msg->msg.data_len; | |
347 | } else { | |
348 | rsp.msg.data_len = 0; | |
349 | } | |
350 | ||
351 | if (copy_to_user(arg, &rsp, sizeof(rsp))) { | |
352 | rv = -EFAULT; | |
353 | goto recv_putback_on_err; | |
354 | } | |
355 | ||
d6dfd131 | 356 | mutex_unlock(&priv->recv_mutex); |
1da177e4 LT |
357 | ipmi_free_recv_msg(msg); |
358 | break; | |
359 | ||
360 | recv_putback_on_err: | |
361 | /* If we got an error, put the message back onto | |
362 | the head of the queue. */ | |
363 | spin_lock_irqsave(&(priv->recv_msg_lock), flags); | |
364 | list_add(entry, &(priv->recv_msgs)); | |
365 | spin_unlock_irqrestore(&(priv->recv_msg_lock), flags); | |
d6dfd131 | 366 | mutex_unlock(&priv->recv_mutex); |
1da177e4 LT |
367 | break; |
368 | ||
369 | recv_err: | |
d6dfd131 | 370 | mutex_unlock(&priv->recv_mutex); |
1da177e4 LT |
371 | break; |
372 | } | |
373 | ||
374 | case IPMICTL_REGISTER_FOR_CMD: | |
375 | { | |
376 | struct ipmi_cmdspec val; | |
377 | ||
378 | if (copy_from_user(&val, arg, sizeof(val))) { | |
379 | rv = -EFAULT; | |
380 | break; | |
381 | } | |
382 | ||
c69c3127 CM |
383 | rv = ipmi_register_for_cmd(priv->user, val.netfn, val.cmd, |
384 | IPMI_CHAN_ALL); | |
1da177e4 LT |
385 | break; |
386 | } | |
387 | ||
388 | case IPMICTL_UNREGISTER_FOR_CMD: | |
389 | { | |
390 | struct ipmi_cmdspec val; | |
391 | ||
392 | if (copy_from_user(&val, arg, sizeof(val))) { | |
393 | rv = -EFAULT; | |
394 | break; | |
395 | } | |
396 | ||
c69c3127 CM |
397 | rv = ipmi_unregister_for_cmd(priv->user, val.netfn, val.cmd, |
398 | IPMI_CHAN_ALL); | |
399 | break; | |
400 | } | |
401 | ||
402 | case IPMICTL_REGISTER_FOR_CMD_CHANS: | |
403 | { | |
404 | struct ipmi_cmdspec_chans val; | |
405 | ||
406 | if (copy_from_user(&val, arg, sizeof(val))) { | |
407 | rv = -EFAULT; | |
408 | break; | |
409 | } | |
410 | ||
411 | rv = ipmi_register_for_cmd(priv->user, val.netfn, val.cmd, | |
412 | val.chans); | |
413 | break; | |
414 | } | |
415 | ||
416 | case IPMICTL_UNREGISTER_FOR_CMD_CHANS: | |
417 | { | |
418 | struct ipmi_cmdspec_chans val; | |
419 | ||
420 | if (copy_from_user(&val, arg, sizeof(val))) { | |
421 | rv = -EFAULT; | |
422 | break; | |
423 | } | |
424 | ||
425 | rv = ipmi_unregister_for_cmd(priv->user, val.netfn, val.cmd, | |
426 | val.chans); | |
1da177e4 LT |
427 | break; |
428 | } | |
429 | ||
430 | case IPMICTL_SET_GETS_EVENTS_CMD: | |
431 | { | |
432 | int val; | |
433 | ||
434 | if (copy_from_user(&val, arg, sizeof(val))) { | |
435 | rv = -EFAULT; | |
436 | break; | |
437 | } | |
438 | ||
439 | rv = ipmi_set_gets_events(priv->user, val); | |
440 | break; | |
441 | } | |
442 | ||
c14979b9 | 443 | /* The next four are legacy, not per-channel. */ |
1da177e4 LT |
444 | case IPMICTL_SET_MY_ADDRESS_CMD: |
445 | { | |
446 | unsigned int val; | |
447 | ||
448 | if (copy_from_user(&val, arg, sizeof(val))) { | |
449 | rv = -EFAULT; | |
450 | break; | |
451 | } | |
452 | ||
c14979b9 | 453 | rv = ipmi_set_my_address(priv->user, 0, val); |
1da177e4 LT |
454 | break; |
455 | } | |
456 | ||
457 | case IPMICTL_GET_MY_ADDRESS_CMD: | |
458 | { | |
c14979b9 CM |
459 | unsigned int val; |
460 | unsigned char rval; | |
461 | ||
462 | rv = ipmi_get_my_address(priv->user, 0, &rval); | |
463 | if (rv) | |
464 | break; | |
1da177e4 | 465 | |
c14979b9 | 466 | val = rval; |
1da177e4 LT |
467 | |
468 | if (copy_to_user(arg, &val, sizeof(val))) { | |
469 | rv = -EFAULT; | |
470 | break; | |
471 | } | |
1da177e4 LT |
472 | break; |
473 | } | |
474 | ||
475 | case IPMICTL_SET_MY_LUN_CMD: | |
476 | { | |
477 | unsigned int val; | |
478 | ||
479 | if (copy_from_user(&val, arg, sizeof(val))) { | |
480 | rv = -EFAULT; | |
481 | break; | |
482 | } | |
483 | ||
c14979b9 | 484 | rv = ipmi_set_my_LUN(priv->user, 0, val); |
1da177e4 LT |
485 | break; |
486 | } | |
487 | ||
488 | case IPMICTL_GET_MY_LUN_CMD: | |
489 | { | |
c14979b9 CM |
490 | unsigned int val; |
491 | unsigned char rval; | |
492 | ||
493 | rv = ipmi_get_my_LUN(priv->user, 0, &rval); | |
494 | if (rv) | |
495 | break; | |
1da177e4 | 496 | |
c14979b9 | 497 | val = rval; |
1da177e4 LT |
498 | |
499 | if (copy_to_user(arg, &val, sizeof(val))) { | |
500 | rv = -EFAULT; | |
501 | break; | |
502 | } | |
1da177e4 LT |
503 | break; |
504 | } | |
c14979b9 CM |
505 | |
506 | case IPMICTL_SET_MY_CHANNEL_ADDRESS_CMD: | |
507 | { | |
508 | struct ipmi_channel_lun_address_set val; | |
509 | ||
510 | if (copy_from_user(&val, arg, sizeof(val))) { | |
511 | rv = -EFAULT; | |
512 | break; | |
513 | } | |
514 | ||
515 | return ipmi_set_my_address(priv->user, val.channel, val.value); | |
516 | break; | |
517 | } | |
518 | ||
519 | case IPMICTL_GET_MY_CHANNEL_ADDRESS_CMD: | |
520 | { | |
521 | struct ipmi_channel_lun_address_set val; | |
522 | ||
523 | if (copy_from_user(&val, arg, sizeof(val))) { | |
524 | rv = -EFAULT; | |
525 | break; | |
526 | } | |
527 | ||
528 | rv = ipmi_get_my_address(priv->user, val.channel, &val.value); | |
529 | if (rv) | |
530 | break; | |
531 | ||
532 | if (copy_to_user(arg, &val, sizeof(val))) { | |
533 | rv = -EFAULT; | |
534 | break; | |
535 | } | |
536 | break; | |
537 | } | |
538 | ||
539 | case IPMICTL_SET_MY_CHANNEL_LUN_CMD: | |
540 | { | |
541 | struct ipmi_channel_lun_address_set val; | |
542 | ||
543 | if (copy_from_user(&val, arg, sizeof(val))) { | |
544 | rv = -EFAULT; | |
545 | break; | |
546 | } | |
547 | ||
548 | rv = ipmi_set_my_LUN(priv->user, val.channel, val.value); | |
549 | break; | |
550 | } | |
551 | ||
552 | case IPMICTL_GET_MY_CHANNEL_LUN_CMD: | |
553 | { | |
554 | struct ipmi_channel_lun_address_set val; | |
555 | ||
556 | if (copy_from_user(&val, arg, sizeof(val))) { | |
557 | rv = -EFAULT; | |
558 | break; | |
559 | } | |
560 | ||
561 | rv = ipmi_get_my_LUN(priv->user, val.channel, &val.value); | |
562 | if (rv) | |
563 | break; | |
564 | ||
565 | if (copy_to_user(arg, &val, sizeof(val))) { | |
566 | rv = -EFAULT; | |
567 | break; | |
568 | } | |
569 | break; | |
570 | } | |
571 | ||
1da177e4 LT |
572 | case IPMICTL_SET_TIMING_PARMS_CMD: |
573 | { | |
574 | struct ipmi_timing_parms parms; | |
575 | ||
576 | if (copy_from_user(&parms, arg, sizeof(parms))) { | |
577 | rv = -EFAULT; | |
578 | break; | |
579 | } | |
580 | ||
581 | priv->default_retries = parms.retries; | |
582 | priv->default_retry_time_ms = parms.retry_time_ms; | |
583 | rv = 0; | |
584 | break; | |
585 | } | |
586 | ||
587 | case IPMICTL_GET_TIMING_PARMS_CMD: | |
588 | { | |
589 | struct ipmi_timing_parms parms; | |
590 | ||
591 | parms.retries = priv->default_retries; | |
592 | parms.retry_time_ms = priv->default_retry_time_ms; | |
593 | ||
594 | if (copy_to_user(arg, &parms, sizeof(parms))) { | |
595 | rv = -EFAULT; | |
596 | break; | |
597 | } | |
598 | ||
599 | rv = 0; | |
600 | break; | |
601 | } | |
b9675136 CM |
602 | |
603 | case IPMICTL_GET_MAINTENANCE_MODE_CMD: | |
604 | { | |
605 | int mode; | |
606 | ||
607 | mode = ipmi_get_maintenance_mode(priv->user); | |
608 | if (copy_to_user(arg, &mode, sizeof(mode))) { | |
609 | rv = -EFAULT; | |
610 | break; | |
611 | } | |
612 | rv = 0; | |
613 | break; | |
614 | } | |
615 | ||
616 | case IPMICTL_SET_MAINTENANCE_MODE_CMD: | |
617 | { | |
618 | int mode; | |
619 | ||
620 | if (copy_from_user(&mode, arg, sizeof(mode))) { | |
621 | rv = -EFAULT; | |
622 | break; | |
623 | } | |
624 | rv = ipmi_set_maintenance_mode(priv->user, mode); | |
625 | break; | |
626 | } | |
1da177e4 LT |
627 | } |
628 | ||
629 | return rv; | |
630 | } | |
631 | ||
55929332 AB |
632 | /* |
633 | * Note: it doesn't make sense to take the BKL here but | |
634 | * not in compat_ipmi_ioctl. -arnd | |
635 | */ | |
636 | static long ipmi_unlocked_ioctl(struct file *file, | |
637 | unsigned int cmd, | |
638 | unsigned long data) | |
639 | { | |
640 | int ret; | |
641 | ||
642 | lock_kernel(); | |
643 | ret = ipmi_ioctl(file, cmd, data); | |
644 | unlock_kernel(); | |
645 | ||
646 | return ret; | |
647 | } | |
648 | ||
6a94f920 AM |
649 | #ifdef CONFIG_COMPAT |
650 | ||
651 | /* | |
652 | * The following code contains code for supporting 32-bit compatible | |
653 | * ioctls on 64-bit kernels. This allows running 32-bit apps on the | |
654 | * 64-bit kernel | |
655 | */ | |
656 | #define COMPAT_IPMICTL_SEND_COMMAND \ | |
657 | _IOR(IPMI_IOC_MAGIC, 13, struct compat_ipmi_req) | |
658 | #define COMPAT_IPMICTL_SEND_COMMAND_SETTIME \ | |
659 | _IOR(IPMI_IOC_MAGIC, 21, struct compat_ipmi_req_settime) | |
660 | #define COMPAT_IPMICTL_RECEIVE_MSG \ | |
661 | _IOWR(IPMI_IOC_MAGIC, 12, struct compat_ipmi_recv) | |
662 | #define COMPAT_IPMICTL_RECEIVE_MSG_TRUNC \ | |
663 | _IOWR(IPMI_IOC_MAGIC, 11, struct compat_ipmi_recv) | |
664 | ||
665 | struct compat_ipmi_msg { | |
666 | u8 netfn; | |
667 | u8 cmd; | |
668 | u16 data_len; | |
669 | compat_uptr_t data; | |
670 | }; | |
671 | ||
672 | struct compat_ipmi_req { | |
673 | compat_uptr_t addr; | |
674 | compat_uint_t addr_len; | |
675 | compat_long_t msgid; | |
676 | struct compat_ipmi_msg msg; | |
677 | }; | |
678 | ||
679 | struct compat_ipmi_recv { | |
680 | compat_int_t recv_type; | |
681 | compat_uptr_t addr; | |
682 | compat_uint_t addr_len; | |
683 | compat_long_t msgid; | |
684 | struct compat_ipmi_msg msg; | |
685 | }; | |
686 | ||
687 | struct compat_ipmi_req_settime { | |
688 | struct compat_ipmi_req req; | |
689 | compat_int_t retries; | |
690 | compat_uint_t retry_time_ms; | |
691 | }; | |
692 | ||
693 | /* | |
694 | * Define some helper functions for copying IPMI data | |
695 | */ | |
696 | static long get_compat_ipmi_msg(struct ipmi_msg *p64, | |
697 | struct compat_ipmi_msg __user *p32) | |
698 | { | |
699 | compat_uptr_t tmp; | |
700 | ||
701 | if (!access_ok(VERIFY_READ, p32, sizeof(*p32)) || | |
702 | __get_user(p64->netfn, &p32->netfn) || | |
703 | __get_user(p64->cmd, &p32->cmd) || | |
704 | __get_user(p64->data_len, &p32->data_len) || | |
705 | __get_user(tmp, &p32->data)) | |
706 | return -EFAULT; | |
707 | p64->data = compat_ptr(tmp); | |
708 | return 0; | |
709 | } | |
710 | ||
711 | static long put_compat_ipmi_msg(struct ipmi_msg *p64, | |
712 | struct compat_ipmi_msg __user *p32) | |
713 | { | |
714 | if (!access_ok(VERIFY_WRITE, p32, sizeof(*p32)) || | |
715 | __put_user(p64->netfn, &p32->netfn) || | |
716 | __put_user(p64->cmd, &p32->cmd) || | |
717 | __put_user(p64->data_len, &p32->data_len)) | |
718 | return -EFAULT; | |
719 | return 0; | |
720 | } | |
721 | ||
722 | static long get_compat_ipmi_req(struct ipmi_req *p64, | |
723 | struct compat_ipmi_req __user *p32) | |
724 | { | |
725 | ||
726 | compat_uptr_t tmp; | |
727 | ||
728 | if (!access_ok(VERIFY_READ, p32, sizeof(*p32)) || | |
729 | __get_user(tmp, &p32->addr) || | |
730 | __get_user(p64->addr_len, &p32->addr_len) || | |
731 | __get_user(p64->msgid, &p32->msgid) || | |
732 | get_compat_ipmi_msg(&p64->msg, &p32->msg)) | |
733 | return -EFAULT; | |
734 | p64->addr = compat_ptr(tmp); | |
735 | return 0; | |
736 | } | |
737 | ||
738 | static long get_compat_ipmi_req_settime(struct ipmi_req_settime *p64, | |
739 | struct compat_ipmi_req_settime __user *p32) | |
740 | { | |
741 | if (!access_ok(VERIFY_READ, p32, sizeof(*p32)) || | |
742 | get_compat_ipmi_req(&p64->req, &p32->req) || | |
743 | __get_user(p64->retries, &p32->retries) || | |
744 | __get_user(p64->retry_time_ms, &p32->retry_time_ms)) | |
745 | return -EFAULT; | |
746 | return 0; | |
747 | } | |
748 | ||
749 | static long get_compat_ipmi_recv(struct ipmi_recv *p64, | |
750 | struct compat_ipmi_recv __user *p32) | |
751 | { | |
752 | compat_uptr_t tmp; | |
753 | ||
754 | if (!access_ok(VERIFY_READ, p32, sizeof(*p32)) || | |
755 | __get_user(p64->recv_type, &p32->recv_type) || | |
756 | __get_user(tmp, &p32->addr) || | |
757 | __get_user(p64->addr_len, &p32->addr_len) || | |
758 | __get_user(p64->msgid, &p32->msgid) || | |
759 | get_compat_ipmi_msg(&p64->msg, &p32->msg)) | |
760 | return -EFAULT; | |
761 | p64->addr = compat_ptr(tmp); | |
762 | return 0; | |
763 | } | |
764 | ||
765 | static long put_compat_ipmi_recv(struct ipmi_recv *p64, | |
766 | struct compat_ipmi_recv __user *p32) | |
767 | { | |
768 | if (!access_ok(VERIFY_WRITE, p32, sizeof(*p32)) || | |
769 | __put_user(p64->recv_type, &p32->recv_type) || | |
770 | __put_user(p64->addr_len, &p32->addr_len) || | |
771 | __put_user(p64->msgid, &p32->msgid) || | |
772 | put_compat_ipmi_msg(&p64->msg, &p32->msg)) | |
773 | return -EFAULT; | |
774 | return 0; | |
775 | } | |
776 | ||
777 | /* | |
778 | * Handle compatibility ioctls | |
779 | */ | |
780 | static long compat_ipmi_ioctl(struct file *filep, unsigned int cmd, | |
781 | unsigned long arg) | |
782 | { | |
783 | int rc; | |
784 | struct ipmi_file_private *priv = filep->private_data; | |
785 | ||
786 | switch(cmd) { | |
787 | case COMPAT_IPMICTL_SEND_COMMAND: | |
788 | { | |
789 | struct ipmi_req rp; | |
790 | ||
791 | if (get_compat_ipmi_req(&rp, compat_ptr(arg))) | |
792 | return -EFAULT; | |
793 | ||
794 | return handle_send_req(priv->user, &rp, | |
795 | priv->default_retries, | |
796 | priv->default_retry_time_ms); | |
797 | } | |
798 | case COMPAT_IPMICTL_SEND_COMMAND_SETTIME: | |
799 | { | |
800 | struct ipmi_req_settime sp; | |
801 | ||
802 | if (get_compat_ipmi_req_settime(&sp, compat_ptr(arg))) | |
803 | return -EFAULT; | |
804 | ||
805 | return handle_send_req(priv->user, &sp.req, | |
806 | sp.retries, sp.retry_time_ms); | |
807 | } | |
808 | case COMPAT_IPMICTL_RECEIVE_MSG: | |
809 | case COMPAT_IPMICTL_RECEIVE_MSG_TRUNC: | |
810 | { | |
18fb9442 AV |
811 | struct ipmi_recv __user *precv64; |
812 | struct ipmi_recv recv64; | |
6a94f920 AM |
813 | |
814 | if (get_compat_ipmi_recv(&recv64, compat_ptr(arg))) | |
815 | return -EFAULT; | |
816 | ||
817 | precv64 = compat_alloc_user_space(sizeof(recv64)); | |
818 | if (copy_to_user(precv64, &recv64, sizeof(recv64))) | |
819 | return -EFAULT; | |
820 | ||
55929332 | 821 | rc = ipmi_ioctl(filep, |
6a94f920 AM |
822 | ((cmd == COMPAT_IPMICTL_RECEIVE_MSG) |
823 | ? IPMICTL_RECEIVE_MSG | |
824 | : IPMICTL_RECEIVE_MSG_TRUNC), | |
18fb9442 | 825 | (unsigned long) precv64); |
6a94f920 AM |
826 | if (rc != 0) |
827 | return rc; | |
828 | ||
829 | if (copy_from_user(&recv64, precv64, sizeof(recv64))) | |
830 | return -EFAULT; | |
831 | ||
832 | if (put_compat_ipmi_recv(&recv64, compat_ptr(arg))) | |
833 | return -EFAULT; | |
834 | ||
835 | return rc; | |
836 | } | |
837 | default: | |
55929332 | 838 | return ipmi_ioctl(filep, cmd, arg); |
6a94f920 AM |
839 | } |
840 | } | |
841 | #endif | |
1da177e4 | 842 | |
62322d25 | 843 | static const struct file_operations ipmi_fops = { |
1da177e4 | 844 | .owner = THIS_MODULE, |
55929332 | 845 | .unlocked_ioctl = ipmi_unlocked_ioctl, |
6a94f920 AM |
846 | #ifdef CONFIG_COMPAT |
847 | .compat_ioctl = compat_ipmi_ioctl, | |
848 | #endif | |
1da177e4 LT |
849 | .open = ipmi_open, |
850 | .release = ipmi_release, | |
851 | .fasync = ipmi_fasync, | |
852 | .poll = ipmi_poll, | |
6038f373 | 853 | .llseek = noop_llseek, |
1da177e4 LT |
854 | }; |
855 | ||
856 | #define DEVICE_NAME "ipmidev" | |
857 | ||
0c8204b3 | 858 | static int ipmi_major; |
1da177e4 LT |
859 | module_param(ipmi_major, int, 0); |
860 | MODULE_PARM_DESC(ipmi_major, "Sets the major number of the IPMI device. By" | |
861 | " default, or if you set it to zero, it will choose the next" | |
862 | " available device. Setting it to -1 will disable the" | |
863 | " interface. Other values will set the major device number" | |
864 | " to that value."); | |
865 | ||
50c812b2 CM |
866 | /* Keep track of the devices that are registered. */ |
867 | struct ipmi_reg_list { | |
868 | dev_t dev; | |
869 | struct list_head link; | |
870 | }; | |
871 | static LIST_HEAD(reg_list); | |
872 | static DEFINE_MUTEX(reg_list_mutex); | |
873 | ||
eb51b650 | 874 | static struct class *ipmi_class; |
37e0915b | 875 | |
50c812b2 | 876 | static void ipmi_new_smi(int if_num, struct device *device) |
1da177e4 | 877 | { |
37e0915b | 878 | dev_t dev = MKDEV(ipmi_major, if_num); |
50c812b2 | 879 | struct ipmi_reg_list *entry; |
37e0915b | 880 | |
50c812b2 CM |
881 | entry = kmalloc(sizeof(*entry), GFP_KERNEL); |
882 | if (!entry) { | |
883 | printk(KERN_ERR "ipmi_devintf: Unable to create the" | |
884 | " ipmi class device link\n"); | |
885 | return; | |
886 | } | |
887 | entry->dev = dev; | |
888 | ||
889 | mutex_lock(®_list_mutex); | |
03457cd4 | 890 | device_create(ipmi_class, device, dev, NULL, "ipmi%d", if_num); |
50c812b2 CM |
891 | list_add(&entry->link, ®_list); |
892 | mutex_unlock(®_list_mutex); | |
1da177e4 LT |
893 | } |
894 | ||
895 | static void ipmi_smi_gone(int if_num) | |
896 | { | |
50c812b2 CM |
897 | dev_t dev = MKDEV(ipmi_major, if_num); |
898 | struct ipmi_reg_list *entry; | |
899 | ||
900 | mutex_lock(®_list_mutex); | |
901 | list_for_each_entry(entry, ®_list, link) { | |
902 | if (entry->dev == dev) { | |
903 | list_del(&entry->link); | |
904 | kfree(entry); | |
905 | break; | |
906 | } | |
907 | } | |
07c015e7 | 908 | device_destroy(ipmi_class, dev); |
50c812b2 | 909 | mutex_unlock(®_list_mutex); |
1da177e4 LT |
910 | } |
911 | ||
912 | static struct ipmi_smi_watcher smi_watcher = | |
913 | { | |
914 | .owner = THIS_MODULE, | |
915 | .new_smi = ipmi_new_smi, | |
916 | .smi_gone = ipmi_smi_gone, | |
917 | }; | |
918 | ||
919 | static __init int init_ipmi_devintf(void) | |
920 | { | |
921 | int rv; | |
922 | ||
923 | if (ipmi_major < 0) | |
924 | return -EINVAL; | |
925 | ||
1fdd75bd | 926 | printk(KERN_INFO "ipmi device interface\n"); |
1da177e4 | 927 | |
eb51b650 | 928 | ipmi_class = class_create(THIS_MODULE, "ipmi"); |
37e0915b CM |
929 | if (IS_ERR(ipmi_class)) { |
930 | printk(KERN_ERR "ipmi: can't register device class\n"); | |
931 | return PTR_ERR(ipmi_class); | |
932 | } | |
933 | ||
1da177e4 LT |
934 | rv = register_chrdev(ipmi_major, DEVICE_NAME, &ipmi_fops); |
935 | if (rv < 0) { | |
eb51b650 | 936 | class_destroy(ipmi_class); |
1da177e4 LT |
937 | printk(KERN_ERR "ipmi: can't get major %d\n", ipmi_major); |
938 | return rv; | |
939 | } | |
940 | ||
941 | if (ipmi_major == 0) { | |
942 | ipmi_major = rv; | |
943 | } | |
944 | ||
1da177e4 LT |
945 | rv = ipmi_smi_watcher_register(&smi_watcher); |
946 | if (rv) { | |
947 | unregister_chrdev(ipmi_major, DEVICE_NAME); | |
eb51b650 | 948 | class_destroy(ipmi_class); |
1da177e4 LT |
949 | printk(KERN_WARNING "ipmi: can't register smi watcher\n"); |
950 | return rv; | |
951 | } | |
952 | ||
953 | return 0; | |
954 | } | |
955 | module_init(init_ipmi_devintf); | |
956 | ||
957 | static __exit void cleanup_ipmi(void) | |
958 | { | |
50c812b2 CM |
959 | struct ipmi_reg_list *entry, *entry2; |
960 | mutex_lock(®_list_mutex); | |
961 | list_for_each_entry_safe(entry, entry2, ®_list, link) { | |
962 | list_del(&entry->link); | |
07c015e7 | 963 | device_destroy(ipmi_class, entry->dev); |
50c812b2 CM |
964 | kfree(entry); |
965 | } | |
966 | mutex_unlock(®_list_mutex); | |
eb51b650 | 967 | class_destroy(ipmi_class); |
1da177e4 | 968 | ipmi_smi_watcher_unregister(&smi_watcher); |
1da177e4 LT |
969 | unregister_chrdev(ipmi_major, DEVICE_NAME); |
970 | } | |
971 | module_exit(cleanup_ipmi); | |
972 | ||
973 | MODULE_LICENSE("GPL"); | |
1fdd75bd CM |
974 | MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>"); |
975 | MODULE_DESCRIPTION("Linux device interface for the IPMI message handler."); | |
6c89161b | 976 | MODULE_ALIAS("platform:ipmi_si"); |