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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 | ||
34 | #include <linux/config.h> | |
35 | #include <linux/module.h> | |
36 | #include <linux/moduleparam.h> | |
37 | #include <linux/errno.h> | |
38 | #include <asm/system.h> | |
39 | #include <linux/sched.h> | |
40 | #include <linux/poll.h> | |
41 | #include <linux/spinlock.h> | |
42 | #include <linux/slab.h> | |
43 | #include <linux/devfs_fs_kernel.h> | |
44 | #include <linux/ipmi.h> | |
45 | #include <asm/semaphore.h> | |
46 | #include <linux/init.h> | |
37e0915b | 47 | #include <linux/device.h> |
6a94f920 | 48 | #include <linux/compat.h> |
1da177e4 | 49 | |
1da177e4 LT |
50 | struct ipmi_file_private |
51 | { | |
52 | ipmi_user_t user; | |
53 | spinlock_t recv_msg_lock; | |
54 | struct list_head recv_msgs; | |
55 | struct file *file; | |
56 | struct fasync_struct *fasync_queue; | |
57 | wait_queue_head_t wait; | |
58 | struct semaphore recv_sem; | |
59 | int default_retries; | |
60 | unsigned int default_retry_time_ms; | |
61 | }; | |
62 | ||
63 | static void file_receive_handler(struct ipmi_recv_msg *msg, | |
64 | void *handler_data) | |
65 | { | |
66 | struct ipmi_file_private *priv = handler_data; | |
67 | int was_empty; | |
68 | unsigned long flags; | |
69 | ||
70 | spin_lock_irqsave(&(priv->recv_msg_lock), flags); | |
71 | ||
72 | was_empty = list_empty(&(priv->recv_msgs)); | |
73 | list_add_tail(&(msg->link), &(priv->recv_msgs)); | |
74 | ||
75 | if (was_empty) { | |
76 | wake_up_interruptible(&priv->wait); | |
77 | kill_fasync(&priv->fasync_queue, SIGIO, POLL_IN); | |
78 | } | |
79 | ||
80 | spin_unlock_irqrestore(&(priv->recv_msg_lock), flags); | |
81 | } | |
82 | ||
83 | static unsigned int ipmi_poll(struct file *file, poll_table *wait) | |
84 | { | |
85 | struct ipmi_file_private *priv = file->private_data; | |
86 | unsigned int mask = 0; | |
87 | unsigned long flags; | |
88 | ||
89 | poll_wait(file, &priv->wait, wait); | |
90 | ||
91 | spin_lock_irqsave(&priv->recv_msg_lock, flags); | |
92 | ||
93 | if (! list_empty(&(priv->recv_msgs))) | |
94 | mask |= (POLLIN | POLLRDNORM); | |
95 | ||
96 | spin_unlock_irqrestore(&priv->recv_msg_lock, flags); | |
97 | ||
98 | return mask; | |
99 | } | |
100 | ||
101 | static int ipmi_fasync(int fd, struct file *file, int on) | |
102 | { | |
103 | struct ipmi_file_private *priv = file->private_data; | |
104 | int result; | |
105 | ||
106 | result = fasync_helper(fd, file, on, &priv->fasync_queue); | |
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 | ||
127 | priv->file = file; | |
128 | ||
129 | rv = ipmi_create_user(if_num, | |
130 | &ipmi_hndlrs, | |
131 | priv, | |
132 | &(priv->user)); | |
133 | if (rv) { | |
134 | kfree(priv); | |
135 | return rv; | |
136 | } | |
137 | ||
138 | file->private_data = priv; | |
139 | ||
140 | spin_lock_init(&(priv->recv_msg_lock)); | |
141 | INIT_LIST_HEAD(&(priv->recv_msgs)); | |
142 | init_waitqueue_head(&priv->wait); | |
143 | priv->fasync_queue = NULL; | |
144 | sema_init(&(priv->recv_sem), 1); | |
145 | ||
146 | /* Use the low-level defaults. */ | |
147 | priv->default_retries = -1; | |
148 | priv->default_retry_time_ms = 0; | |
149 | ||
150 | return 0; | |
151 | } | |
152 | ||
153 | static int ipmi_release(struct inode *inode, struct file *file) | |
154 | { | |
155 | struct ipmi_file_private *priv = file->private_data; | |
156 | int rv; | |
157 | ||
158 | rv = ipmi_destroy_user(priv->user); | |
159 | if (rv) | |
160 | return rv; | |
161 | ||
162 | ipmi_fasync (-1, file, 0); | |
163 | ||
164 | /* FIXME - free the messages in the list. */ | |
165 | kfree(priv); | |
166 | ||
167 | return 0; | |
168 | } | |
169 | ||
170 | static int handle_send_req(ipmi_user_t user, | |
171 | struct ipmi_req *req, | |
172 | int retries, | |
173 | unsigned int retry_time_ms) | |
174 | { | |
175 | int rv; | |
176 | struct ipmi_addr addr; | |
177 | struct kernel_ipmi_msg msg; | |
178 | ||
179 | if (req->addr_len > sizeof(struct ipmi_addr)) | |
180 | return -EINVAL; | |
181 | ||
182 | if (copy_from_user(&addr, req->addr, req->addr_len)) | |
183 | return -EFAULT; | |
184 | ||
185 | msg.netfn = req->msg.netfn; | |
186 | msg.cmd = req->msg.cmd; | |
187 | msg.data_len = req->msg.data_len; | |
188 | msg.data = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL); | |
189 | if (!msg.data) | |
190 | return -ENOMEM; | |
191 | ||
192 | /* From here out we cannot return, we must jump to "out" for | |
193 | error exits to free msgdata. */ | |
194 | ||
195 | rv = ipmi_validate_addr(&addr, req->addr_len); | |
196 | if (rv) | |
197 | goto out; | |
198 | ||
199 | if (req->msg.data != NULL) { | |
200 | if (req->msg.data_len > IPMI_MAX_MSG_LENGTH) { | |
201 | rv = -EMSGSIZE; | |
202 | goto out; | |
203 | } | |
204 | ||
205 | if (copy_from_user(msg.data, | |
206 | req->msg.data, | |
207 | req->msg.data_len)) | |
208 | { | |
209 | rv = -EFAULT; | |
210 | goto out; | |
211 | } | |
212 | } else { | |
213 | msg.data_len = 0; | |
214 | } | |
215 | ||
216 | rv = ipmi_request_settime(user, | |
217 | &addr, | |
218 | req->msgid, | |
219 | &msg, | |
220 | NULL, | |
221 | 0, | |
222 | retries, | |
223 | retry_time_ms); | |
224 | out: | |
225 | kfree(msg.data); | |
226 | return rv; | |
227 | } | |
228 | ||
229 | static int ipmi_ioctl(struct inode *inode, | |
230 | struct file *file, | |
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 | ||
288 | /* We claim a semaphore because we don't want two | |
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 | |
295 | queue. This semaphore prevents that problem. */ | |
296 | down(&(priv->recv_sem)); | |
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 | ||
355 | up(&(priv->recv_sem)); | |
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); | |
365 | up(&(priv->recv_sem)); | |
366 | break; | |
367 | ||
368 | recv_err: | |
369 | up(&(priv->recv_sem)); | |
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 | ||
382 | rv = ipmi_register_for_cmd(priv->user, val.netfn, val.cmd); | |
383 | break; | |
384 | } | |
385 | ||
386 | case IPMICTL_UNREGISTER_FOR_CMD: | |
387 | { | |
388 | struct ipmi_cmdspec val; | |
389 | ||
390 | if (copy_from_user(&val, arg, sizeof(val))) { | |
391 | rv = -EFAULT; | |
392 | break; | |
393 | } | |
394 | ||
395 | rv = ipmi_unregister_for_cmd(priv->user, val.netfn, val.cmd); | |
396 | break; | |
397 | } | |
398 | ||
399 | case IPMICTL_SET_GETS_EVENTS_CMD: | |
400 | { | |
401 | int val; | |
402 | ||
403 | if (copy_from_user(&val, arg, sizeof(val))) { | |
404 | rv = -EFAULT; | |
405 | break; | |
406 | } | |
407 | ||
408 | rv = ipmi_set_gets_events(priv->user, val); | |
409 | break; | |
410 | } | |
411 | ||
c14979b9 | 412 | /* The next four are legacy, not per-channel. */ |
1da177e4 LT |
413 | case IPMICTL_SET_MY_ADDRESS_CMD: |
414 | { | |
415 | unsigned int val; | |
416 | ||
417 | if (copy_from_user(&val, arg, sizeof(val))) { | |
418 | rv = -EFAULT; | |
419 | break; | |
420 | } | |
421 | ||
c14979b9 | 422 | rv = ipmi_set_my_address(priv->user, 0, val); |
1da177e4 LT |
423 | break; |
424 | } | |
425 | ||
426 | case IPMICTL_GET_MY_ADDRESS_CMD: | |
427 | { | |
c14979b9 CM |
428 | unsigned int val; |
429 | unsigned char rval; | |
430 | ||
431 | rv = ipmi_get_my_address(priv->user, 0, &rval); | |
432 | if (rv) | |
433 | break; | |
1da177e4 | 434 | |
c14979b9 | 435 | val = rval; |
1da177e4 LT |
436 | |
437 | if (copy_to_user(arg, &val, sizeof(val))) { | |
438 | rv = -EFAULT; | |
439 | break; | |
440 | } | |
1da177e4 LT |
441 | break; |
442 | } | |
443 | ||
444 | case IPMICTL_SET_MY_LUN_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_LUN(priv->user, 0, val); |
1da177e4 LT |
454 | break; |
455 | } | |
456 | ||
457 | case IPMICTL_GET_MY_LUN_CMD: | |
458 | { | |
c14979b9 CM |
459 | unsigned int val; |
460 | unsigned char rval; | |
461 | ||
462 | rv = ipmi_get_my_LUN(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 | } | |
c14979b9 CM |
474 | |
475 | case IPMICTL_SET_MY_CHANNEL_ADDRESS_CMD: | |
476 | { | |
477 | struct ipmi_channel_lun_address_set val; | |
478 | ||
479 | if (copy_from_user(&val, arg, sizeof(val))) { | |
480 | rv = -EFAULT; | |
481 | break; | |
482 | } | |
483 | ||
484 | return ipmi_set_my_address(priv->user, val.channel, val.value); | |
485 | break; | |
486 | } | |
487 | ||
488 | case IPMICTL_GET_MY_CHANNEL_ADDRESS_CMD: | |
489 | { | |
490 | struct ipmi_channel_lun_address_set val; | |
491 | ||
492 | if (copy_from_user(&val, arg, sizeof(val))) { | |
493 | rv = -EFAULT; | |
494 | break; | |
495 | } | |
496 | ||
497 | rv = ipmi_get_my_address(priv->user, val.channel, &val.value); | |
498 | if (rv) | |
499 | break; | |
500 | ||
501 | if (copy_to_user(arg, &val, sizeof(val))) { | |
502 | rv = -EFAULT; | |
503 | break; | |
504 | } | |
505 | break; | |
506 | } | |
507 | ||
508 | case IPMICTL_SET_MY_CHANNEL_LUN_CMD: | |
509 | { | |
510 | struct ipmi_channel_lun_address_set val; | |
511 | ||
512 | if (copy_from_user(&val, arg, sizeof(val))) { | |
513 | rv = -EFAULT; | |
514 | break; | |
515 | } | |
516 | ||
517 | rv = ipmi_set_my_LUN(priv->user, val.channel, val.value); | |
518 | break; | |
519 | } | |
520 | ||
521 | case IPMICTL_GET_MY_CHANNEL_LUN_CMD: | |
522 | { | |
523 | struct ipmi_channel_lun_address_set val; | |
524 | ||
525 | if (copy_from_user(&val, arg, sizeof(val))) { | |
526 | rv = -EFAULT; | |
527 | break; | |
528 | } | |
529 | ||
530 | rv = ipmi_get_my_LUN(priv->user, val.channel, &val.value); | |
531 | if (rv) | |
532 | break; | |
533 | ||
534 | if (copy_to_user(arg, &val, sizeof(val))) { | |
535 | rv = -EFAULT; | |
536 | break; | |
537 | } | |
538 | break; | |
539 | } | |
540 | ||
1da177e4 LT |
541 | case IPMICTL_SET_TIMING_PARMS_CMD: |
542 | { | |
543 | struct ipmi_timing_parms parms; | |
544 | ||
545 | if (copy_from_user(&parms, arg, sizeof(parms))) { | |
546 | rv = -EFAULT; | |
547 | break; | |
548 | } | |
549 | ||
550 | priv->default_retries = parms.retries; | |
551 | priv->default_retry_time_ms = parms.retry_time_ms; | |
552 | rv = 0; | |
553 | break; | |
554 | } | |
555 | ||
556 | case IPMICTL_GET_TIMING_PARMS_CMD: | |
557 | { | |
558 | struct ipmi_timing_parms parms; | |
559 | ||
560 | parms.retries = priv->default_retries; | |
561 | parms.retry_time_ms = priv->default_retry_time_ms; | |
562 | ||
563 | if (copy_to_user(arg, &parms, sizeof(parms))) { | |
564 | rv = -EFAULT; | |
565 | break; | |
566 | } | |
567 | ||
568 | rv = 0; | |
569 | break; | |
570 | } | |
571 | } | |
572 | ||
573 | return rv; | |
574 | } | |
575 | ||
6a94f920 AM |
576 | #ifdef CONFIG_COMPAT |
577 | ||
578 | /* | |
579 | * The following code contains code for supporting 32-bit compatible | |
580 | * ioctls on 64-bit kernels. This allows running 32-bit apps on the | |
581 | * 64-bit kernel | |
582 | */ | |
583 | #define COMPAT_IPMICTL_SEND_COMMAND \ | |
584 | _IOR(IPMI_IOC_MAGIC, 13, struct compat_ipmi_req) | |
585 | #define COMPAT_IPMICTL_SEND_COMMAND_SETTIME \ | |
586 | _IOR(IPMI_IOC_MAGIC, 21, struct compat_ipmi_req_settime) | |
587 | #define COMPAT_IPMICTL_RECEIVE_MSG \ | |
588 | _IOWR(IPMI_IOC_MAGIC, 12, struct compat_ipmi_recv) | |
589 | #define COMPAT_IPMICTL_RECEIVE_MSG_TRUNC \ | |
590 | _IOWR(IPMI_IOC_MAGIC, 11, struct compat_ipmi_recv) | |
591 | ||
592 | struct compat_ipmi_msg { | |
593 | u8 netfn; | |
594 | u8 cmd; | |
595 | u16 data_len; | |
596 | compat_uptr_t data; | |
597 | }; | |
598 | ||
599 | struct compat_ipmi_req { | |
600 | compat_uptr_t addr; | |
601 | compat_uint_t addr_len; | |
602 | compat_long_t msgid; | |
603 | struct compat_ipmi_msg msg; | |
604 | }; | |
605 | ||
606 | struct compat_ipmi_recv { | |
607 | compat_int_t recv_type; | |
608 | compat_uptr_t addr; | |
609 | compat_uint_t addr_len; | |
610 | compat_long_t msgid; | |
611 | struct compat_ipmi_msg msg; | |
612 | }; | |
613 | ||
614 | struct compat_ipmi_req_settime { | |
615 | struct compat_ipmi_req req; | |
616 | compat_int_t retries; | |
617 | compat_uint_t retry_time_ms; | |
618 | }; | |
619 | ||
620 | /* | |
621 | * Define some helper functions for copying IPMI data | |
622 | */ | |
623 | static long get_compat_ipmi_msg(struct ipmi_msg *p64, | |
624 | struct compat_ipmi_msg __user *p32) | |
625 | { | |
626 | compat_uptr_t tmp; | |
627 | ||
628 | if (!access_ok(VERIFY_READ, p32, sizeof(*p32)) || | |
629 | __get_user(p64->netfn, &p32->netfn) || | |
630 | __get_user(p64->cmd, &p32->cmd) || | |
631 | __get_user(p64->data_len, &p32->data_len) || | |
632 | __get_user(tmp, &p32->data)) | |
633 | return -EFAULT; | |
634 | p64->data = compat_ptr(tmp); | |
635 | return 0; | |
636 | } | |
637 | ||
638 | static long put_compat_ipmi_msg(struct ipmi_msg *p64, | |
639 | struct compat_ipmi_msg __user *p32) | |
640 | { | |
641 | if (!access_ok(VERIFY_WRITE, p32, sizeof(*p32)) || | |
642 | __put_user(p64->netfn, &p32->netfn) || | |
643 | __put_user(p64->cmd, &p32->cmd) || | |
644 | __put_user(p64->data_len, &p32->data_len)) | |
645 | return -EFAULT; | |
646 | return 0; | |
647 | } | |
648 | ||
649 | static long get_compat_ipmi_req(struct ipmi_req *p64, | |
650 | struct compat_ipmi_req __user *p32) | |
651 | { | |
652 | ||
653 | compat_uptr_t tmp; | |
654 | ||
655 | if (!access_ok(VERIFY_READ, p32, sizeof(*p32)) || | |
656 | __get_user(tmp, &p32->addr) || | |
657 | __get_user(p64->addr_len, &p32->addr_len) || | |
658 | __get_user(p64->msgid, &p32->msgid) || | |
659 | get_compat_ipmi_msg(&p64->msg, &p32->msg)) | |
660 | return -EFAULT; | |
661 | p64->addr = compat_ptr(tmp); | |
662 | return 0; | |
663 | } | |
664 | ||
665 | static long get_compat_ipmi_req_settime(struct ipmi_req_settime *p64, | |
666 | struct compat_ipmi_req_settime __user *p32) | |
667 | { | |
668 | if (!access_ok(VERIFY_READ, p32, sizeof(*p32)) || | |
669 | get_compat_ipmi_req(&p64->req, &p32->req) || | |
670 | __get_user(p64->retries, &p32->retries) || | |
671 | __get_user(p64->retry_time_ms, &p32->retry_time_ms)) | |
672 | return -EFAULT; | |
673 | return 0; | |
674 | } | |
675 | ||
676 | static long get_compat_ipmi_recv(struct ipmi_recv *p64, | |
677 | struct compat_ipmi_recv __user *p32) | |
678 | { | |
679 | compat_uptr_t tmp; | |
680 | ||
681 | if (!access_ok(VERIFY_READ, p32, sizeof(*p32)) || | |
682 | __get_user(p64->recv_type, &p32->recv_type) || | |
683 | __get_user(tmp, &p32->addr) || | |
684 | __get_user(p64->addr_len, &p32->addr_len) || | |
685 | __get_user(p64->msgid, &p32->msgid) || | |
686 | get_compat_ipmi_msg(&p64->msg, &p32->msg)) | |
687 | return -EFAULT; | |
688 | p64->addr = compat_ptr(tmp); | |
689 | return 0; | |
690 | } | |
691 | ||
692 | static long put_compat_ipmi_recv(struct ipmi_recv *p64, | |
693 | struct compat_ipmi_recv __user *p32) | |
694 | { | |
695 | if (!access_ok(VERIFY_WRITE, p32, sizeof(*p32)) || | |
696 | __put_user(p64->recv_type, &p32->recv_type) || | |
697 | __put_user(p64->addr_len, &p32->addr_len) || | |
698 | __put_user(p64->msgid, &p32->msgid) || | |
699 | put_compat_ipmi_msg(&p64->msg, &p32->msg)) | |
700 | return -EFAULT; | |
701 | return 0; | |
702 | } | |
703 | ||
704 | /* | |
705 | * Handle compatibility ioctls | |
706 | */ | |
707 | static long compat_ipmi_ioctl(struct file *filep, unsigned int cmd, | |
708 | unsigned long arg) | |
709 | { | |
710 | int rc; | |
711 | struct ipmi_file_private *priv = filep->private_data; | |
712 | ||
713 | switch(cmd) { | |
714 | case COMPAT_IPMICTL_SEND_COMMAND: | |
715 | { | |
716 | struct ipmi_req rp; | |
717 | ||
718 | if (get_compat_ipmi_req(&rp, compat_ptr(arg))) | |
719 | return -EFAULT; | |
720 | ||
721 | return handle_send_req(priv->user, &rp, | |
722 | priv->default_retries, | |
723 | priv->default_retry_time_ms); | |
724 | } | |
725 | case COMPAT_IPMICTL_SEND_COMMAND_SETTIME: | |
726 | { | |
727 | struct ipmi_req_settime sp; | |
728 | ||
729 | if (get_compat_ipmi_req_settime(&sp, compat_ptr(arg))) | |
730 | return -EFAULT; | |
731 | ||
732 | return handle_send_req(priv->user, &sp.req, | |
733 | sp.retries, sp.retry_time_ms); | |
734 | } | |
735 | case COMPAT_IPMICTL_RECEIVE_MSG: | |
736 | case COMPAT_IPMICTL_RECEIVE_MSG_TRUNC: | |
737 | { | |
18fb9442 Z |
738 | struct ipmi_recv __user *precv64; |
739 | struct ipmi_recv recv64; | |
6a94f920 AM |
740 | |
741 | if (get_compat_ipmi_recv(&recv64, compat_ptr(arg))) | |
742 | return -EFAULT; | |
743 | ||
744 | precv64 = compat_alloc_user_space(sizeof(recv64)); | |
745 | if (copy_to_user(precv64, &recv64, sizeof(recv64))) | |
746 | return -EFAULT; | |
747 | ||
748 | rc = ipmi_ioctl(filep->f_dentry->d_inode, filep, | |
749 | ((cmd == COMPAT_IPMICTL_RECEIVE_MSG) | |
750 | ? IPMICTL_RECEIVE_MSG | |
751 | : IPMICTL_RECEIVE_MSG_TRUNC), | |
18fb9442 | 752 | (unsigned long) precv64); |
6a94f920 AM |
753 | if (rc != 0) |
754 | return rc; | |
755 | ||
756 | if (copy_from_user(&recv64, precv64, sizeof(recv64))) | |
757 | return -EFAULT; | |
758 | ||
759 | if (put_compat_ipmi_recv(&recv64, compat_ptr(arg))) | |
760 | return -EFAULT; | |
761 | ||
762 | return rc; | |
763 | } | |
764 | default: | |
765 | return ipmi_ioctl(filep->f_dentry->d_inode, filep, cmd, arg); | |
766 | } | |
767 | } | |
768 | #endif | |
1da177e4 LT |
769 | |
770 | static struct file_operations ipmi_fops = { | |
771 | .owner = THIS_MODULE, | |
772 | .ioctl = ipmi_ioctl, | |
6a94f920 AM |
773 | #ifdef CONFIG_COMPAT |
774 | .compat_ioctl = compat_ipmi_ioctl, | |
775 | #endif | |
1da177e4 LT |
776 | .open = ipmi_open, |
777 | .release = ipmi_release, | |
778 | .fasync = ipmi_fasync, | |
779 | .poll = ipmi_poll, | |
780 | }; | |
781 | ||
782 | #define DEVICE_NAME "ipmidev" | |
783 | ||
784 | static int ipmi_major = 0; | |
785 | module_param(ipmi_major, int, 0); | |
786 | MODULE_PARM_DESC(ipmi_major, "Sets the major number of the IPMI device. By" | |
787 | " default, or if you set it to zero, it will choose the next" | |
788 | " available device. Setting it to -1 will disable the" | |
789 | " interface. Other values will set the major device number" | |
790 | " to that value."); | |
791 | ||
eb51b650 | 792 | static struct class *ipmi_class; |
37e0915b | 793 | |
1da177e4 LT |
794 | static void ipmi_new_smi(int if_num) |
795 | { | |
37e0915b CM |
796 | dev_t dev = MKDEV(ipmi_major, if_num); |
797 | ||
798 | devfs_mk_cdev(dev, S_IFCHR | S_IRUSR | S_IWUSR, | |
1da177e4 | 799 | "ipmidev/%d", if_num); |
37e0915b | 800 | |
53f46542 | 801 | class_device_create(ipmi_class, NULL, dev, NULL, "ipmi%d", if_num); |
1da177e4 LT |
802 | } |
803 | ||
804 | static void ipmi_smi_gone(int if_num) | |
805 | { | |
eb51b650 | 806 | class_device_destroy(ipmi_class, MKDEV(ipmi_major, if_num)); |
1da177e4 LT |
807 | devfs_remove("ipmidev/%d", if_num); |
808 | } | |
809 | ||
810 | static struct ipmi_smi_watcher smi_watcher = | |
811 | { | |
812 | .owner = THIS_MODULE, | |
813 | .new_smi = ipmi_new_smi, | |
814 | .smi_gone = ipmi_smi_gone, | |
815 | }; | |
816 | ||
817 | static __init int init_ipmi_devintf(void) | |
818 | { | |
819 | int rv; | |
820 | ||
821 | if (ipmi_major < 0) | |
822 | return -EINVAL; | |
823 | ||
1fdd75bd | 824 | printk(KERN_INFO "ipmi device interface\n"); |
1da177e4 | 825 | |
eb51b650 | 826 | ipmi_class = class_create(THIS_MODULE, "ipmi"); |
37e0915b CM |
827 | if (IS_ERR(ipmi_class)) { |
828 | printk(KERN_ERR "ipmi: can't register device class\n"); | |
829 | return PTR_ERR(ipmi_class); | |
830 | } | |
831 | ||
1da177e4 LT |
832 | rv = register_chrdev(ipmi_major, DEVICE_NAME, &ipmi_fops); |
833 | if (rv < 0) { | |
eb51b650 | 834 | class_destroy(ipmi_class); |
1da177e4 LT |
835 | printk(KERN_ERR "ipmi: can't get major %d\n", ipmi_major); |
836 | return rv; | |
837 | } | |
838 | ||
839 | if (ipmi_major == 0) { | |
840 | ipmi_major = rv; | |
841 | } | |
842 | ||
843 | devfs_mk_dir(DEVICE_NAME); | |
844 | ||
845 | rv = ipmi_smi_watcher_register(&smi_watcher); | |
846 | if (rv) { | |
847 | unregister_chrdev(ipmi_major, DEVICE_NAME); | |
eb51b650 | 848 | class_destroy(ipmi_class); |
1da177e4 LT |
849 | printk(KERN_WARNING "ipmi: can't register smi watcher\n"); |
850 | return rv; | |
851 | } | |
852 | ||
853 | return 0; | |
854 | } | |
855 | module_init(init_ipmi_devintf); | |
856 | ||
857 | static __exit void cleanup_ipmi(void) | |
858 | { | |
eb51b650 | 859 | class_destroy(ipmi_class); |
1da177e4 LT |
860 | ipmi_smi_watcher_unregister(&smi_watcher); |
861 | devfs_remove(DEVICE_NAME); | |
862 | unregister_chrdev(ipmi_major, DEVICE_NAME); | |
863 | } | |
864 | module_exit(cleanup_ipmi); | |
865 | ||
866 | MODULE_LICENSE("GPL"); | |
1fdd75bd CM |
867 | MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>"); |
868 | MODULE_DESCRIPTION("Linux device interface for the IPMI message handler."); |