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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 | ||
afc9a42b | 81 | static __poll_t ipmi_poll(struct file *file, poll_table *wait) |
1da177e4 LT |
82 | { |
83 | struct ipmi_file_private *priv = file->private_data; | |
afc9a42b | 84 | __poll_t mask = 0; |
1da177e4 LT |
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 | ||
210af2a5 | 111 | static const struct ipmi_user_hndl ipmi_hndlrs = |
1da177e4 LT |
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; | |
bdf2829c | 160 | struct ipmi_recv_msg *msg, *next; |
1da177e4 LT |
161 | |
162 | rv = ipmi_destroy_user(priv->user); | |
163 | if (rv) | |
164 | return rv; | |
165 | ||
bdf2829c NK |
166 | list_for_each_entry_safe(msg, next, &priv->recv_msgs, link) |
167 | ipmi_free_recv_msg(msg); | |
168 | ||
169 | ||
1da177e4 LT |
170 | kfree(priv); |
171 | ||
172 | return 0; | |
173 | } | |
174 | ||
175 | static int handle_send_req(ipmi_user_t user, | |
176 | struct ipmi_req *req, | |
177 | int retries, | |
178 | unsigned int retry_time_ms) | |
179 | { | |
180 | int rv; | |
181 | struct ipmi_addr addr; | |
182 | struct kernel_ipmi_msg msg; | |
183 | ||
184 | if (req->addr_len > sizeof(struct ipmi_addr)) | |
185 | return -EINVAL; | |
186 | ||
187 | if (copy_from_user(&addr, req->addr, req->addr_len)) | |
188 | return -EFAULT; | |
189 | ||
190 | msg.netfn = req->msg.netfn; | |
191 | msg.cmd = req->msg.cmd; | |
192 | msg.data_len = req->msg.data_len; | |
193 | msg.data = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL); | |
194 | if (!msg.data) | |
195 | return -ENOMEM; | |
196 | ||
197 | /* From here out we cannot return, we must jump to "out" for | |
198 | error exits to free msgdata. */ | |
199 | ||
200 | rv = ipmi_validate_addr(&addr, req->addr_len); | |
201 | if (rv) | |
202 | goto out; | |
203 | ||
204 | if (req->msg.data != NULL) { | |
205 | if (req->msg.data_len > IPMI_MAX_MSG_LENGTH) { | |
206 | rv = -EMSGSIZE; | |
207 | goto out; | |
208 | } | |
209 | ||
210 | if (copy_from_user(msg.data, | |
211 | req->msg.data, | |
212 | req->msg.data_len)) | |
213 | { | |
214 | rv = -EFAULT; | |
215 | goto out; | |
216 | } | |
217 | } else { | |
218 | msg.data_len = 0; | |
219 | } | |
220 | ||
221 | rv = ipmi_request_settime(user, | |
222 | &addr, | |
223 | req->msgid, | |
224 | &msg, | |
225 | NULL, | |
226 | 0, | |
227 | retries, | |
228 | retry_time_ms); | |
229 | out: | |
230 | kfree(msg.data); | |
231 | return rv; | |
232 | } | |
233 | ||
8b9e04f2 AV |
234 | static int handle_recv(struct ipmi_file_private *priv, |
235 | bool trunc, struct ipmi_recv *rsp, | |
236 | int (*copyout)(struct ipmi_recv *, void __user *), | |
237 | void __user *to) | |
238 | { | |
239 | int addr_len; | |
240 | struct list_head *entry; | |
241 | struct ipmi_recv_msg *msg; | |
242 | unsigned long flags; | |
243 | int rv = 0; | |
244 | ||
245 | /* We claim a mutex because we don't want two | |
246 | users getting something from the queue at a time. | |
247 | Since we have to release the spinlock before we can | |
248 | copy the data to the user, it's possible another | |
249 | user will grab something from the queue, too. Then | |
250 | the messages might get out of order if something | |
251 | fails and the message gets put back onto the | |
252 | queue. This mutex prevents that problem. */ | |
253 | mutex_lock(&priv->recv_mutex); | |
254 | ||
255 | /* Grab the message off the list. */ | |
256 | spin_lock_irqsave(&(priv->recv_msg_lock), flags); | |
257 | if (list_empty(&(priv->recv_msgs))) { | |
258 | spin_unlock_irqrestore(&(priv->recv_msg_lock), flags); | |
259 | rv = -EAGAIN; | |
260 | goto recv_err; | |
261 | } | |
262 | entry = priv->recv_msgs.next; | |
263 | msg = list_entry(entry, struct ipmi_recv_msg, link); | |
264 | list_del(entry); | |
265 | spin_unlock_irqrestore(&(priv->recv_msg_lock), flags); | |
266 | ||
267 | addr_len = ipmi_addr_length(msg->addr.addr_type); | |
268 | if (rsp->addr_len < addr_len) | |
269 | { | |
270 | rv = -EINVAL; | |
271 | goto recv_putback_on_err; | |
272 | } | |
273 | ||
274 | if (copy_to_user(rsp->addr, &(msg->addr), addr_len)) { | |
275 | rv = -EFAULT; | |
276 | goto recv_putback_on_err; | |
277 | } | |
278 | rsp->addr_len = addr_len; | |
279 | ||
280 | rsp->recv_type = msg->recv_type; | |
281 | rsp->msgid = msg->msgid; | |
282 | rsp->msg.netfn = msg->msg.netfn; | |
283 | rsp->msg.cmd = msg->msg.cmd; | |
284 | ||
285 | if (msg->msg.data_len > 0) { | |
286 | if (rsp->msg.data_len < msg->msg.data_len) { | |
287 | rv = -EMSGSIZE; | |
288 | if (trunc) | |
289 | msg->msg.data_len = rsp->msg.data_len; | |
290 | else | |
291 | goto recv_putback_on_err; | |
292 | } | |
293 | ||
294 | if (copy_to_user(rsp->msg.data, | |
295 | msg->msg.data, | |
296 | msg->msg.data_len)) | |
297 | { | |
298 | rv = -EFAULT; | |
299 | goto recv_putback_on_err; | |
300 | } | |
301 | rsp->msg.data_len = msg->msg.data_len; | |
302 | } else { | |
303 | rsp->msg.data_len = 0; | |
304 | } | |
305 | ||
306 | rv = copyout(rsp, to); | |
307 | if (rv) | |
308 | goto recv_putback_on_err; | |
309 | ||
310 | mutex_unlock(&priv->recv_mutex); | |
311 | ipmi_free_recv_msg(msg); | |
312 | return 0; | |
313 | ||
314 | recv_putback_on_err: | |
315 | /* If we got an error, put the message back onto | |
316 | the head of the queue. */ | |
317 | spin_lock_irqsave(&(priv->recv_msg_lock), flags); | |
318 | list_add(entry, &(priv->recv_msgs)); | |
319 | spin_unlock_irqrestore(&(priv->recv_msg_lock), flags); | |
320 | recv_err: | |
321 | mutex_unlock(&priv->recv_mutex); | |
322 | return rv; | |
323 | } | |
324 | ||
325 | static int copyout_recv(struct ipmi_recv *rsp, void __user *to) | |
326 | { | |
327 | return copy_to_user(to, rsp, sizeof(struct ipmi_recv)) ? -EFAULT : 0; | |
328 | } | |
329 | ||
55929332 | 330 | static int ipmi_ioctl(struct file *file, |
1da177e4 LT |
331 | unsigned int cmd, |
332 | unsigned long data) | |
333 | { | |
334 | int rv = -EINVAL; | |
335 | struct ipmi_file_private *priv = file->private_data; | |
336 | void __user *arg = (void __user *)data; | |
337 | ||
338 | switch (cmd) | |
339 | { | |
340 | case IPMICTL_SEND_COMMAND: | |
341 | { | |
342 | struct ipmi_req req; | |
343 | ||
344 | if (copy_from_user(&req, arg, sizeof(req))) { | |
345 | rv = -EFAULT; | |
346 | break; | |
347 | } | |
348 | ||
349 | rv = handle_send_req(priv->user, | |
350 | &req, | |
351 | priv->default_retries, | |
352 | priv->default_retry_time_ms); | |
353 | break; | |
354 | } | |
355 | ||
356 | case IPMICTL_SEND_COMMAND_SETTIME: | |
357 | { | |
358 | struct ipmi_req_settime req; | |
359 | ||
360 | if (copy_from_user(&req, arg, sizeof(req))) { | |
361 | rv = -EFAULT; | |
362 | break; | |
363 | } | |
364 | ||
365 | rv = handle_send_req(priv->user, | |
366 | &req.req, | |
367 | req.retries, | |
368 | req.retry_time_ms); | |
369 | break; | |
370 | } | |
371 | ||
372 | case IPMICTL_RECEIVE_MSG: | |
373 | case IPMICTL_RECEIVE_MSG_TRUNC: | |
374 | { | |
375 | struct ipmi_recv rsp; | |
1da177e4 | 376 | |
8b9e04f2 | 377 | if (copy_from_user(&rsp, arg, sizeof(rsp))) |
1da177e4 | 378 | rv = -EFAULT; |
8b9e04f2 AV |
379 | else |
380 | rv = handle_recv(priv, cmd == IPMICTL_RECEIVE_MSG_TRUNC, | |
381 | &rsp, copyout_recv, arg); | |
1da177e4 LT |
382 | break; |
383 | } | |
384 | ||
385 | case IPMICTL_REGISTER_FOR_CMD: | |
386 | { | |
387 | struct ipmi_cmdspec val; | |
388 | ||
389 | if (copy_from_user(&val, arg, sizeof(val))) { | |
390 | rv = -EFAULT; | |
391 | break; | |
392 | } | |
393 | ||
c69c3127 CM |
394 | rv = ipmi_register_for_cmd(priv->user, val.netfn, val.cmd, |
395 | IPMI_CHAN_ALL); | |
1da177e4 LT |
396 | break; |
397 | } | |
398 | ||
399 | case IPMICTL_UNREGISTER_FOR_CMD: | |
400 | { | |
401 | struct ipmi_cmdspec val; | |
402 | ||
403 | if (copy_from_user(&val, arg, sizeof(val))) { | |
404 | rv = -EFAULT; | |
405 | break; | |
406 | } | |
407 | ||
c69c3127 CM |
408 | rv = ipmi_unregister_for_cmd(priv->user, val.netfn, val.cmd, |
409 | IPMI_CHAN_ALL); | |
410 | break; | |
411 | } | |
412 | ||
413 | case IPMICTL_REGISTER_FOR_CMD_CHANS: | |
414 | { | |
415 | struct ipmi_cmdspec_chans val; | |
416 | ||
417 | if (copy_from_user(&val, arg, sizeof(val))) { | |
418 | rv = -EFAULT; | |
419 | break; | |
420 | } | |
421 | ||
422 | rv = ipmi_register_for_cmd(priv->user, val.netfn, val.cmd, | |
423 | val.chans); | |
424 | break; | |
425 | } | |
426 | ||
427 | case IPMICTL_UNREGISTER_FOR_CMD_CHANS: | |
428 | { | |
429 | struct ipmi_cmdspec_chans val; | |
430 | ||
431 | if (copy_from_user(&val, arg, sizeof(val))) { | |
432 | rv = -EFAULT; | |
433 | break; | |
434 | } | |
435 | ||
436 | rv = ipmi_unregister_for_cmd(priv->user, val.netfn, val.cmd, | |
437 | val.chans); | |
1da177e4 LT |
438 | break; |
439 | } | |
440 | ||
441 | case IPMICTL_SET_GETS_EVENTS_CMD: | |
442 | { | |
443 | int val; | |
444 | ||
445 | if (copy_from_user(&val, arg, sizeof(val))) { | |
446 | rv = -EFAULT; | |
447 | break; | |
448 | } | |
449 | ||
450 | rv = ipmi_set_gets_events(priv->user, val); | |
451 | break; | |
452 | } | |
453 | ||
c14979b9 | 454 | /* The next four are legacy, not per-channel. */ |
1da177e4 LT |
455 | case IPMICTL_SET_MY_ADDRESS_CMD: |
456 | { | |
457 | unsigned int val; | |
458 | ||
459 | if (copy_from_user(&val, arg, sizeof(val))) { | |
460 | rv = -EFAULT; | |
461 | break; | |
462 | } | |
463 | ||
c14979b9 | 464 | rv = ipmi_set_my_address(priv->user, 0, val); |
1da177e4 LT |
465 | break; |
466 | } | |
467 | ||
468 | case IPMICTL_GET_MY_ADDRESS_CMD: | |
469 | { | |
c14979b9 CM |
470 | unsigned int val; |
471 | unsigned char rval; | |
472 | ||
473 | rv = ipmi_get_my_address(priv->user, 0, &rval); | |
474 | if (rv) | |
475 | break; | |
1da177e4 | 476 | |
c14979b9 | 477 | val = rval; |
1da177e4 LT |
478 | |
479 | if (copy_to_user(arg, &val, sizeof(val))) { | |
480 | rv = -EFAULT; | |
481 | break; | |
482 | } | |
1da177e4 LT |
483 | break; |
484 | } | |
485 | ||
486 | case IPMICTL_SET_MY_LUN_CMD: | |
487 | { | |
488 | unsigned int val; | |
489 | ||
490 | if (copy_from_user(&val, arg, sizeof(val))) { | |
491 | rv = -EFAULT; | |
492 | break; | |
493 | } | |
494 | ||
c14979b9 | 495 | rv = ipmi_set_my_LUN(priv->user, 0, val); |
1da177e4 LT |
496 | break; |
497 | } | |
498 | ||
499 | case IPMICTL_GET_MY_LUN_CMD: | |
500 | { | |
c14979b9 CM |
501 | unsigned int val; |
502 | unsigned char rval; | |
503 | ||
504 | rv = ipmi_get_my_LUN(priv->user, 0, &rval); | |
505 | if (rv) | |
506 | break; | |
1da177e4 | 507 | |
c14979b9 | 508 | val = rval; |
1da177e4 LT |
509 | |
510 | if (copy_to_user(arg, &val, sizeof(val))) { | |
511 | rv = -EFAULT; | |
512 | break; | |
513 | } | |
1da177e4 LT |
514 | break; |
515 | } | |
c14979b9 CM |
516 | |
517 | case IPMICTL_SET_MY_CHANNEL_ADDRESS_CMD: | |
518 | { | |
519 | struct ipmi_channel_lun_address_set val; | |
520 | ||
521 | if (copy_from_user(&val, arg, sizeof(val))) { | |
522 | rv = -EFAULT; | |
523 | break; | |
524 | } | |
525 | ||
526 | return ipmi_set_my_address(priv->user, val.channel, val.value); | |
527 | break; | |
528 | } | |
529 | ||
530 | case IPMICTL_GET_MY_CHANNEL_ADDRESS_CMD: | |
531 | { | |
532 | struct ipmi_channel_lun_address_set val; | |
533 | ||
534 | if (copy_from_user(&val, arg, sizeof(val))) { | |
535 | rv = -EFAULT; | |
536 | break; | |
537 | } | |
538 | ||
539 | rv = ipmi_get_my_address(priv->user, val.channel, &val.value); | |
540 | if (rv) | |
541 | break; | |
542 | ||
543 | if (copy_to_user(arg, &val, sizeof(val))) { | |
544 | rv = -EFAULT; | |
545 | break; | |
546 | } | |
547 | break; | |
548 | } | |
549 | ||
550 | case IPMICTL_SET_MY_CHANNEL_LUN_CMD: | |
551 | { | |
552 | struct ipmi_channel_lun_address_set val; | |
553 | ||
554 | if (copy_from_user(&val, arg, sizeof(val))) { | |
555 | rv = -EFAULT; | |
556 | break; | |
557 | } | |
558 | ||
559 | rv = ipmi_set_my_LUN(priv->user, val.channel, val.value); | |
560 | break; | |
561 | } | |
562 | ||
563 | case IPMICTL_GET_MY_CHANNEL_LUN_CMD: | |
564 | { | |
565 | struct ipmi_channel_lun_address_set val; | |
566 | ||
567 | if (copy_from_user(&val, arg, sizeof(val))) { | |
568 | rv = -EFAULT; | |
569 | break; | |
570 | } | |
571 | ||
572 | rv = ipmi_get_my_LUN(priv->user, val.channel, &val.value); | |
573 | if (rv) | |
574 | break; | |
575 | ||
576 | if (copy_to_user(arg, &val, sizeof(val))) { | |
577 | rv = -EFAULT; | |
578 | break; | |
579 | } | |
580 | break; | |
581 | } | |
582 | ||
1da177e4 LT |
583 | case IPMICTL_SET_TIMING_PARMS_CMD: |
584 | { | |
585 | struct ipmi_timing_parms parms; | |
586 | ||
587 | if (copy_from_user(&parms, arg, sizeof(parms))) { | |
588 | rv = -EFAULT; | |
589 | break; | |
590 | } | |
591 | ||
592 | priv->default_retries = parms.retries; | |
593 | priv->default_retry_time_ms = parms.retry_time_ms; | |
594 | rv = 0; | |
595 | break; | |
596 | } | |
597 | ||
598 | case IPMICTL_GET_TIMING_PARMS_CMD: | |
599 | { | |
600 | struct ipmi_timing_parms parms; | |
601 | ||
602 | parms.retries = priv->default_retries; | |
603 | parms.retry_time_ms = priv->default_retry_time_ms; | |
604 | ||
605 | if (copy_to_user(arg, &parms, sizeof(parms))) { | |
606 | rv = -EFAULT; | |
607 | break; | |
608 | } | |
609 | ||
610 | rv = 0; | |
611 | break; | |
612 | } | |
b9675136 CM |
613 | |
614 | case IPMICTL_GET_MAINTENANCE_MODE_CMD: | |
615 | { | |
616 | int mode; | |
617 | ||
618 | mode = ipmi_get_maintenance_mode(priv->user); | |
619 | if (copy_to_user(arg, &mode, sizeof(mode))) { | |
620 | rv = -EFAULT; | |
621 | break; | |
622 | } | |
623 | rv = 0; | |
624 | break; | |
625 | } | |
626 | ||
627 | case IPMICTL_SET_MAINTENANCE_MODE_CMD: | |
628 | { | |
629 | int mode; | |
630 | ||
631 | if (copy_from_user(&mode, arg, sizeof(mode))) { | |
632 | rv = -EFAULT; | |
633 | break; | |
634 | } | |
635 | rv = ipmi_set_maintenance_mode(priv->user, mode); | |
636 | break; | |
637 | } | |
1da177e4 LT |
638 | } |
639 | ||
640 | return rv; | |
641 | } | |
642 | ||
55929332 AB |
643 | /* |
644 | * Note: it doesn't make sense to take the BKL here but | |
645 | * not in compat_ipmi_ioctl. -arnd | |
646 | */ | |
647 | static long ipmi_unlocked_ioctl(struct file *file, | |
648 | unsigned int cmd, | |
649 | unsigned long data) | |
650 | { | |
651 | int ret; | |
652 | ||
609146fd | 653 | mutex_lock(&ipmi_mutex); |
55929332 | 654 | ret = ipmi_ioctl(file, cmd, data); |
609146fd | 655 | mutex_unlock(&ipmi_mutex); |
55929332 AB |
656 | |
657 | return ret; | |
658 | } | |
659 | ||
6a94f920 AM |
660 | #ifdef CONFIG_COMPAT |
661 | ||
662 | /* | |
663 | * The following code contains code for supporting 32-bit compatible | |
664 | * ioctls on 64-bit kernels. This allows running 32-bit apps on the | |
665 | * 64-bit kernel | |
666 | */ | |
667 | #define COMPAT_IPMICTL_SEND_COMMAND \ | |
668 | _IOR(IPMI_IOC_MAGIC, 13, struct compat_ipmi_req) | |
669 | #define COMPAT_IPMICTL_SEND_COMMAND_SETTIME \ | |
670 | _IOR(IPMI_IOC_MAGIC, 21, struct compat_ipmi_req_settime) | |
671 | #define COMPAT_IPMICTL_RECEIVE_MSG \ | |
672 | _IOWR(IPMI_IOC_MAGIC, 12, struct compat_ipmi_recv) | |
673 | #define COMPAT_IPMICTL_RECEIVE_MSG_TRUNC \ | |
674 | _IOWR(IPMI_IOC_MAGIC, 11, struct compat_ipmi_recv) | |
675 | ||
676 | struct compat_ipmi_msg { | |
677 | u8 netfn; | |
678 | u8 cmd; | |
679 | u16 data_len; | |
680 | compat_uptr_t data; | |
681 | }; | |
682 | ||
683 | struct compat_ipmi_req { | |
684 | compat_uptr_t addr; | |
685 | compat_uint_t addr_len; | |
686 | compat_long_t msgid; | |
687 | struct compat_ipmi_msg msg; | |
688 | }; | |
689 | ||
690 | struct compat_ipmi_recv { | |
691 | compat_int_t recv_type; | |
692 | compat_uptr_t addr; | |
693 | compat_uint_t addr_len; | |
694 | compat_long_t msgid; | |
695 | struct compat_ipmi_msg msg; | |
696 | }; | |
697 | ||
698 | struct compat_ipmi_req_settime { | |
699 | struct compat_ipmi_req req; | |
700 | compat_int_t retries; | |
701 | compat_uint_t retry_time_ms; | |
702 | }; | |
703 | ||
704 | /* | |
705 | * Define some helper functions for copying IPMI data | |
706 | */ | |
e5f699d4 AV |
707 | static void get_compat_ipmi_msg(struct ipmi_msg *p64, |
708 | struct compat_ipmi_msg *p32) | |
6a94f920 | 709 | { |
e5f699d4 AV |
710 | p64->netfn = p32->netfn; |
711 | p64->cmd = p32->cmd; | |
712 | p64->data_len = p32->data_len; | |
713 | p64->data = compat_ptr(p32->data); | |
6a94f920 AM |
714 | } |
715 | ||
e5f699d4 AV |
716 | static void get_compat_ipmi_req(struct ipmi_req *p64, |
717 | struct compat_ipmi_req *p32) | |
6a94f920 | 718 | { |
e5f699d4 AV |
719 | p64->addr = compat_ptr(p32->addr); |
720 | p64->addr_len = p32->addr_len; | |
721 | p64->msgid = p32->msgid; | |
722 | get_compat_ipmi_msg(&p64->msg, &p32->msg); | |
6a94f920 AM |
723 | } |
724 | ||
e5f699d4 AV |
725 | static void get_compat_ipmi_req_settime(struct ipmi_req_settime *p64, |
726 | struct compat_ipmi_req_settime *p32) | |
6a94f920 | 727 | { |
e5f699d4 AV |
728 | get_compat_ipmi_req(&p64->req, &p32->req); |
729 | p64->retries = p32->retries; | |
730 | p64->retry_time_ms = p32->retry_time_ms; | |
6a94f920 AM |
731 | } |
732 | ||
e5f699d4 AV |
733 | static void get_compat_ipmi_recv(struct ipmi_recv *p64, |
734 | struct compat_ipmi_recv *p32) | |
6a94f920 | 735 | { |
e5f699d4 AV |
736 | memset(p64, 0, sizeof(struct ipmi_recv)); |
737 | p64->recv_type = p32->recv_type; | |
738 | p64->addr = compat_ptr(p32->addr); | |
739 | p64->addr_len = p32->addr_len; | |
740 | p64->msgid = p32->msgid; | |
741 | get_compat_ipmi_msg(&p64->msg, &p32->msg); | |
6a94f920 AM |
742 | } |
743 | ||
8b9e04f2 | 744 | static int copyout_recv32(struct ipmi_recv *p64, void __user *to) |
6a94f920 | 745 | { |
8b9e04f2 AV |
746 | struct compat_ipmi_recv v32; |
747 | memset(&v32, 0, sizeof(struct compat_ipmi_recv)); | |
748 | v32.recv_type = p64->recv_type; | |
749 | v32.addr = ptr_to_compat(p64->addr); | |
750 | v32.addr_len = p64->addr_len; | |
751 | v32.msgid = p64->msgid; | |
752 | v32.msg.netfn = p64->msg.netfn; | |
753 | v32.msg.cmd = p64->msg.cmd; | |
754 | v32.msg.data_len = p64->msg.data_len; | |
755 | v32.msg.data = ptr_to_compat(p64->msg.data); | |
756 | return copy_to_user(to, &v32, sizeof(v32)) ? -EFAULT : 0; | |
6a94f920 AM |
757 | } |
758 | ||
759 | /* | |
760 | * Handle compatibility ioctls | |
761 | */ | |
762 | static long compat_ipmi_ioctl(struct file *filep, unsigned int cmd, | |
763 | unsigned long arg) | |
764 | { | |
6a94f920 AM |
765 | struct ipmi_file_private *priv = filep->private_data; |
766 | ||
767 | switch(cmd) { | |
768 | case COMPAT_IPMICTL_SEND_COMMAND: | |
769 | { | |
770 | struct ipmi_req rp; | |
e5f699d4 | 771 | struct compat_ipmi_req r32; |
6a94f920 | 772 | |
e5f699d4 | 773 | if (copy_from_user(&r32, compat_ptr(arg), sizeof(r32))) |
6a94f920 AM |
774 | return -EFAULT; |
775 | ||
e5f699d4 AV |
776 | get_compat_ipmi_req(&rp, &r32); |
777 | ||
6a94f920 AM |
778 | return handle_send_req(priv->user, &rp, |
779 | priv->default_retries, | |
780 | priv->default_retry_time_ms); | |
781 | } | |
782 | case COMPAT_IPMICTL_SEND_COMMAND_SETTIME: | |
783 | { | |
784 | struct ipmi_req_settime sp; | |
e5f699d4 | 785 | struct compat_ipmi_req_settime sp32; |
6a94f920 | 786 | |
e5f699d4 | 787 | if (copy_from_user(&sp32, compat_ptr(arg), sizeof(sp32))) |
6a94f920 AM |
788 | return -EFAULT; |
789 | ||
e5f699d4 AV |
790 | get_compat_ipmi_req_settime(&sp, &sp32); |
791 | ||
6a94f920 AM |
792 | return handle_send_req(priv->user, &sp.req, |
793 | sp.retries, sp.retry_time_ms); | |
794 | } | |
795 | case COMPAT_IPMICTL_RECEIVE_MSG: | |
796 | case COMPAT_IPMICTL_RECEIVE_MSG_TRUNC: | |
797 | { | |
18fb9442 | 798 | struct ipmi_recv recv64; |
e5f699d4 | 799 | struct compat_ipmi_recv recv32; |
6a94f920 | 800 | |
e5f699d4 | 801 | if (copy_from_user(&recv32, compat_ptr(arg), sizeof(recv32))) |
6a94f920 AM |
802 | return -EFAULT; |
803 | ||
e5f699d4 AV |
804 | get_compat_ipmi_recv(&recv64, &recv32); |
805 | ||
8b9e04f2 AV |
806 | return handle_recv(priv, |
807 | cmd == COMPAT_IPMICTL_RECEIVE_MSG_TRUNC, | |
808 | &recv64, copyout_recv32, compat_ptr(arg)); | |
6a94f920 AM |
809 | } |
810 | default: | |
55929332 | 811 | return ipmi_ioctl(filep, cmd, arg); |
6a94f920 AM |
812 | } |
813 | } | |
6368087e BL |
814 | |
815 | static long unlocked_compat_ipmi_ioctl(struct file *filep, unsigned int cmd, | |
816 | unsigned long arg) | |
817 | { | |
818 | int ret; | |
819 | ||
820 | mutex_lock(&ipmi_mutex); | |
821 | ret = compat_ipmi_ioctl(filep, cmd, arg); | |
822 | mutex_unlock(&ipmi_mutex); | |
823 | ||
824 | return ret; | |
825 | } | |
6a94f920 | 826 | #endif |
1da177e4 | 827 | |
62322d25 | 828 | static const struct file_operations ipmi_fops = { |
1da177e4 | 829 | .owner = THIS_MODULE, |
55929332 | 830 | .unlocked_ioctl = ipmi_unlocked_ioctl, |
6a94f920 | 831 | #ifdef CONFIG_COMPAT |
6368087e | 832 | .compat_ioctl = unlocked_compat_ipmi_ioctl, |
6a94f920 | 833 | #endif |
1da177e4 LT |
834 | .open = ipmi_open, |
835 | .release = ipmi_release, | |
836 | .fasync = ipmi_fasync, | |
837 | .poll = ipmi_poll, | |
6038f373 | 838 | .llseek = noop_llseek, |
1da177e4 LT |
839 | }; |
840 | ||
841 | #define DEVICE_NAME "ipmidev" | |
842 | ||
0c8204b3 | 843 | static int ipmi_major; |
1da177e4 LT |
844 | module_param(ipmi_major, int, 0); |
845 | MODULE_PARM_DESC(ipmi_major, "Sets the major number of the IPMI device. By" | |
846 | " default, or if you set it to zero, it will choose the next" | |
847 | " available device. Setting it to -1 will disable the" | |
848 | " interface. Other values will set the major device number" | |
849 | " to that value."); | |
850 | ||
50c812b2 CM |
851 | /* Keep track of the devices that are registered. */ |
852 | struct ipmi_reg_list { | |
853 | dev_t dev; | |
854 | struct list_head link; | |
855 | }; | |
856 | static LIST_HEAD(reg_list); | |
857 | static DEFINE_MUTEX(reg_list_mutex); | |
858 | ||
eb51b650 | 859 | static struct class *ipmi_class; |
37e0915b | 860 | |
50c812b2 | 861 | static void ipmi_new_smi(int if_num, struct device *device) |
1da177e4 | 862 | { |
37e0915b | 863 | dev_t dev = MKDEV(ipmi_major, if_num); |
50c812b2 | 864 | struct ipmi_reg_list *entry; |
37e0915b | 865 | |
50c812b2 CM |
866 | entry = kmalloc(sizeof(*entry), GFP_KERNEL); |
867 | if (!entry) { | |
868 | printk(KERN_ERR "ipmi_devintf: Unable to create the" | |
869 | " ipmi class device link\n"); | |
870 | return; | |
871 | } | |
872 | entry->dev = dev; | |
873 | ||
874 | mutex_lock(®_list_mutex); | |
03457cd4 | 875 | device_create(ipmi_class, device, dev, NULL, "ipmi%d", if_num); |
50c812b2 CM |
876 | list_add(&entry->link, ®_list); |
877 | mutex_unlock(®_list_mutex); | |
1da177e4 LT |
878 | } |
879 | ||
880 | static void ipmi_smi_gone(int if_num) | |
881 | { | |
50c812b2 CM |
882 | dev_t dev = MKDEV(ipmi_major, if_num); |
883 | struct ipmi_reg_list *entry; | |
884 | ||
885 | mutex_lock(®_list_mutex); | |
886 | list_for_each_entry(entry, ®_list, link) { | |
887 | if (entry->dev == dev) { | |
888 | list_del(&entry->link); | |
889 | kfree(entry); | |
890 | break; | |
891 | } | |
892 | } | |
07c015e7 | 893 | device_destroy(ipmi_class, dev); |
50c812b2 | 894 | mutex_unlock(®_list_mutex); |
1da177e4 LT |
895 | } |
896 | ||
897 | static struct ipmi_smi_watcher smi_watcher = | |
898 | { | |
899 | .owner = THIS_MODULE, | |
900 | .new_smi = ipmi_new_smi, | |
901 | .smi_gone = ipmi_smi_gone, | |
902 | }; | |
903 | ||
60ee6d5f | 904 | static int __init init_ipmi_devintf(void) |
1da177e4 LT |
905 | { |
906 | int rv; | |
907 | ||
908 | if (ipmi_major < 0) | |
909 | return -EINVAL; | |
910 | ||
1fdd75bd | 911 | printk(KERN_INFO "ipmi device interface\n"); |
1da177e4 | 912 | |
eb51b650 | 913 | ipmi_class = class_create(THIS_MODULE, "ipmi"); |
37e0915b CM |
914 | if (IS_ERR(ipmi_class)) { |
915 | printk(KERN_ERR "ipmi: can't register device class\n"); | |
916 | return PTR_ERR(ipmi_class); | |
917 | } | |
918 | ||
1da177e4 LT |
919 | rv = register_chrdev(ipmi_major, DEVICE_NAME, &ipmi_fops); |
920 | if (rv < 0) { | |
eb51b650 | 921 | class_destroy(ipmi_class); |
1da177e4 LT |
922 | printk(KERN_ERR "ipmi: can't get major %d\n", ipmi_major); |
923 | return rv; | |
924 | } | |
925 | ||
926 | if (ipmi_major == 0) { | |
927 | ipmi_major = rv; | |
928 | } | |
929 | ||
1da177e4 LT |
930 | rv = ipmi_smi_watcher_register(&smi_watcher); |
931 | if (rv) { | |
932 | unregister_chrdev(ipmi_major, DEVICE_NAME); | |
eb51b650 | 933 | class_destroy(ipmi_class); |
1da177e4 LT |
934 | printk(KERN_WARNING "ipmi: can't register smi watcher\n"); |
935 | return rv; | |
936 | } | |
937 | ||
938 | return 0; | |
939 | } | |
940 | module_init(init_ipmi_devintf); | |
941 | ||
60ee6d5f | 942 | static void __exit cleanup_ipmi(void) |
1da177e4 | 943 | { |
50c812b2 CM |
944 | struct ipmi_reg_list *entry, *entry2; |
945 | mutex_lock(®_list_mutex); | |
946 | list_for_each_entry_safe(entry, entry2, ®_list, link) { | |
947 | list_del(&entry->link); | |
07c015e7 | 948 | device_destroy(ipmi_class, entry->dev); |
50c812b2 CM |
949 | kfree(entry); |
950 | } | |
951 | mutex_unlock(®_list_mutex); | |
eb51b650 | 952 | class_destroy(ipmi_class); |
1da177e4 | 953 | ipmi_smi_watcher_unregister(&smi_watcher); |
1da177e4 LT |
954 | unregister_chrdev(ipmi_major, DEVICE_NAME); |
955 | } | |
956 | module_exit(cleanup_ipmi); | |
957 | ||
958 | MODULE_LICENSE("GPL"); | |
1fdd75bd CM |
959 | MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>"); |
960 | MODULE_DESCRIPTION("Linux device interface for the IPMI message handler."); |