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Commit | Line | Data |
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1da177e4 LT |
1 | /*****************************************************************************/ |
2 | ||
3 | /* | |
4 | * devio.c -- User space communication with USB devices. | |
5 | * | |
6 | * Copyright (C) 1999-2000 Thomas Sailer (sailer@ife.ee.ethz.ch) | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
21 | * | |
22 | * $Id: devio.c,v 1.7 2000/02/01 17:28:48 fliegl Exp $ | |
23 | * | |
24 | * This file implements the usbfs/x/y files, where | |
25 | * x is the bus number and y the device number. | |
26 | * | |
27 | * It allows user space programs/"drivers" to communicate directly | |
28 | * with USB devices without intervening kernel driver. | |
29 | * | |
30 | * Revision history | |
31 | * 22.12.1999 0.1 Initial release (split from proc_usb.c) | |
32 | * 04.01.2000 0.2 Turned into its own filesystem | |
46113830 HW |
33 | * 30.09.2005 0.3 Fix user-triggerable oops in async URB delivery |
34 | * (CAN-2005-3055) | |
1da177e4 LT |
35 | */ |
36 | ||
37 | /*****************************************************************************/ | |
38 | ||
39 | #include <linux/fs.h> | |
40 | #include <linux/mm.h> | |
41 | #include <linux/slab.h> | |
42 | #include <linux/smp_lock.h> | |
43 | #include <linux/signal.h> | |
44 | #include <linux/poll.h> | |
45 | #include <linux/module.h> | |
46 | #include <linux/usb.h> | |
47 | #include <linux/usbdevice_fs.h> | |
fbf82fd2 | 48 | #include <linux/cdev.h> |
a7b986b3 | 49 | #include <linux/notifier.h> |
7a01955f | 50 | #include <linux/security.h> |
1da177e4 LT |
51 | #include <asm/uaccess.h> |
52 | #include <asm/byteorder.h> | |
53 | #include <linux/moduleparam.h> | |
54 | ||
55 | #include "hcd.h" /* for usbcore internals */ | |
56 | #include "usb.h" | |
57 | ||
fbf82fd2 KS |
58 | #define USB_MAXBUS 64 |
59 | #define USB_DEVICE_MAX USB_MAXBUS * 128 | |
fbf82fd2 | 60 | |
4a2a8a2c AS |
61 | /* Mutual exclusion for removal, open, and release */ |
62 | DEFINE_MUTEX(usbfs_mutex); | |
63 | ||
1da177e4 LT |
64 | struct async { |
65 | struct list_head asynclist; | |
66 | struct dev_state *ps; | |
2425c08b | 67 | struct pid *pid; |
46113830 | 68 | uid_t uid, euid; |
1da177e4 LT |
69 | unsigned int signr; |
70 | unsigned int ifnum; | |
71 | void __user *userbuffer; | |
72 | void __user *userurb; | |
73 | struct urb *urb; | |
7a01955f | 74 | u32 secid; |
1da177e4 LT |
75 | }; |
76 | ||
77 | static int usbfs_snoop = 0; | |
78 | module_param (usbfs_snoop, bool, S_IRUGO | S_IWUSR); | |
79 | MODULE_PARM_DESC (usbfs_snoop, "true to log all usbfs traffic"); | |
80 | ||
81 | #define snoop(dev, format, arg...) \ | |
82 | do { \ | |
83 | if (usbfs_snoop) \ | |
84 | dev_info( dev , format , ## arg); \ | |
85 | } while (0) | |
86 | ||
fad21bdf AS |
87 | #define USB_DEVICE_DEV MKDEV(USB_DEVICE_MAJOR, 0) |
88 | ||
1da177e4 LT |
89 | |
90 | #define MAX_USBFS_BUFFER_SIZE 16384 | |
91 | ||
349710c3 | 92 | static inline int connected (struct dev_state *ps) |
1da177e4 | 93 | { |
349710c3 AS |
94 | return (!list_empty(&ps->list) && |
95 | ps->dev->state != USB_STATE_NOTATTACHED); | |
1da177e4 LT |
96 | } |
97 | ||
98 | static loff_t usbdev_lseek(struct file *file, loff_t offset, int orig) | |
99 | { | |
100 | loff_t ret; | |
101 | ||
102 | lock_kernel(); | |
103 | ||
104 | switch (orig) { | |
105 | case 0: | |
106 | file->f_pos = offset; | |
107 | ret = file->f_pos; | |
108 | break; | |
109 | case 1: | |
110 | file->f_pos += offset; | |
111 | ret = file->f_pos; | |
112 | break; | |
113 | case 2: | |
114 | default: | |
115 | ret = -EINVAL; | |
116 | } | |
117 | ||
118 | unlock_kernel(); | |
119 | return ret; | |
120 | } | |
121 | ||
122 | static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos) | |
123 | { | |
ec17cf1c | 124 | struct dev_state *ps = file->private_data; |
1da177e4 LT |
125 | struct usb_device *dev = ps->dev; |
126 | ssize_t ret = 0; | |
127 | unsigned len; | |
128 | loff_t pos; | |
129 | int i; | |
130 | ||
131 | pos = *ppos; | |
132 | usb_lock_device(dev); | |
349710c3 | 133 | if (!connected(ps)) { |
1da177e4 LT |
134 | ret = -ENODEV; |
135 | goto err; | |
136 | } else if (pos < 0) { | |
137 | ret = -EINVAL; | |
138 | goto err; | |
139 | } | |
140 | ||
141 | if (pos < sizeof(struct usb_device_descriptor)) { | |
8781ba0a ON |
142 | struct usb_device_descriptor temp_desc ; /* 18 bytes - fits on the stack */ |
143 | ||
144 | memcpy(&temp_desc, &dev->descriptor, sizeof(dev->descriptor)); | |
9fcd5c32 AM |
145 | le16_to_cpus(&temp_desc.bcdUSB); |
146 | le16_to_cpus(&temp_desc.idVendor); | |
147 | le16_to_cpus(&temp_desc.idProduct); | |
148 | le16_to_cpus(&temp_desc.bcdDevice); | |
1da177e4 LT |
149 | |
150 | len = sizeof(struct usb_device_descriptor) - pos; | |
151 | if (len > nbytes) | |
152 | len = nbytes; | |
8781ba0a | 153 | if (copy_to_user(buf, ((char *)&temp_desc) + pos, len)) { |
1da177e4 LT |
154 | ret = -EFAULT; |
155 | goto err; | |
156 | } | |
1da177e4 LT |
157 | |
158 | *ppos += len; | |
159 | buf += len; | |
160 | nbytes -= len; | |
161 | ret += len; | |
162 | } | |
163 | ||
164 | pos = sizeof(struct usb_device_descriptor); | |
165 | for (i = 0; nbytes && i < dev->descriptor.bNumConfigurations; i++) { | |
166 | struct usb_config_descriptor *config = | |
167 | (struct usb_config_descriptor *)dev->rawdescriptors[i]; | |
168 | unsigned int length = le16_to_cpu(config->wTotalLength); | |
169 | ||
170 | if (*ppos < pos + length) { | |
171 | ||
172 | /* The descriptor may claim to be longer than it | |
173 | * really is. Here is the actual allocated length. */ | |
174 | unsigned alloclen = | |
175 | le16_to_cpu(dev->config[i].desc.wTotalLength); | |
176 | ||
177 | len = length - (*ppos - pos); | |
178 | if (len > nbytes) | |
179 | len = nbytes; | |
180 | ||
181 | /* Simply don't write (skip over) unallocated parts */ | |
182 | if (alloclen > (*ppos - pos)) { | |
183 | alloclen -= (*ppos - pos); | |
184 | if (copy_to_user(buf, | |
185 | dev->rawdescriptors[i] + (*ppos - pos), | |
186 | min(len, alloclen))) { | |
187 | ret = -EFAULT; | |
188 | goto err; | |
189 | } | |
190 | } | |
191 | ||
192 | *ppos += len; | |
193 | buf += len; | |
194 | nbytes -= len; | |
195 | ret += len; | |
196 | } | |
197 | ||
198 | pos += length; | |
199 | } | |
200 | ||
201 | err: | |
202 | usb_unlock_device(dev); | |
203 | return ret; | |
204 | } | |
205 | ||
206 | /* | |
207 | * async list handling | |
208 | */ | |
209 | ||
210 | static struct async *alloc_async(unsigned int numisoframes) | |
211 | { | |
212 | unsigned int assize = sizeof(struct async) + numisoframes * sizeof(struct usb_iso_packet_descriptor); | |
0a1ef3b5 AS |
213 | struct async *as = kzalloc(assize, GFP_KERNEL); |
214 | ||
1da177e4 LT |
215 | if (!as) |
216 | return NULL; | |
1da177e4 LT |
217 | as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL); |
218 | if (!as->urb) { | |
219 | kfree(as); | |
220 | return NULL; | |
221 | } | |
222 | return as; | |
223 | } | |
224 | ||
225 | static void free_async(struct async *as) | |
226 | { | |
2425c08b | 227 | put_pid(as->pid); |
6fd19f4b JJ |
228 | kfree(as->urb->transfer_buffer); |
229 | kfree(as->urb->setup_packet); | |
1da177e4 | 230 | usb_free_urb(as->urb); |
6fd19f4b | 231 | kfree(as); |
1da177e4 LT |
232 | } |
233 | ||
234 | static inline void async_newpending(struct async *as) | |
235 | { | |
236 | struct dev_state *ps = as->ps; | |
237 | unsigned long flags; | |
238 | ||
239 | spin_lock_irqsave(&ps->lock, flags); | |
240 | list_add_tail(&as->asynclist, &ps->async_pending); | |
241 | spin_unlock_irqrestore(&ps->lock, flags); | |
242 | } | |
243 | ||
244 | static inline void async_removepending(struct async *as) | |
245 | { | |
246 | struct dev_state *ps = as->ps; | |
247 | unsigned long flags; | |
248 | ||
249 | spin_lock_irqsave(&ps->lock, flags); | |
250 | list_del_init(&as->asynclist); | |
251 | spin_unlock_irqrestore(&ps->lock, flags); | |
252 | } | |
253 | ||
254 | static inline struct async *async_getcompleted(struct dev_state *ps) | |
255 | { | |
256 | unsigned long flags; | |
257 | struct async *as = NULL; | |
258 | ||
259 | spin_lock_irqsave(&ps->lock, flags); | |
260 | if (!list_empty(&ps->async_completed)) { | |
261 | as = list_entry(ps->async_completed.next, struct async, asynclist); | |
262 | list_del_init(&as->asynclist); | |
263 | } | |
264 | spin_unlock_irqrestore(&ps->lock, flags); | |
265 | return as; | |
266 | } | |
267 | ||
268 | static inline struct async *async_getpending(struct dev_state *ps, void __user *userurb) | |
269 | { | |
270 | unsigned long flags; | |
271 | struct async *as; | |
272 | ||
273 | spin_lock_irqsave(&ps->lock, flags); | |
274 | list_for_each_entry(as, &ps->async_pending, asynclist) | |
275 | if (as->userurb == userurb) { | |
276 | list_del_init(&as->asynclist); | |
277 | spin_unlock_irqrestore(&ps->lock, flags); | |
278 | return as; | |
279 | } | |
280 | spin_unlock_irqrestore(&ps->lock, flags); | |
281 | return NULL; | |
282 | } | |
283 | ||
e639dd3f GKH |
284 | static void snoop_urb(struct urb *urb, void __user *userurb) |
285 | { | |
286 | int j; | |
287 | unsigned char *data = urb->transfer_buffer; | |
288 | ||
289 | if (!usbfs_snoop) | |
290 | return; | |
291 | ||
292 | if (urb->pipe & USB_DIR_IN) | |
293 | dev_info(&urb->dev->dev, "direction=IN\n"); | |
294 | else | |
295 | dev_info(&urb->dev->dev, "direction=OUT\n"); | |
296 | dev_info(&urb->dev->dev, "userurb=%p\n", userurb); | |
297 | dev_info(&urb->dev->dev, "transfer_buffer_length=%d\n", | |
298 | urb->transfer_buffer_length); | |
299 | dev_info(&urb->dev->dev, "actual_length=%d\n", urb->actual_length); | |
300 | dev_info(&urb->dev->dev, "data: "); | |
301 | for (j = 0; j < urb->transfer_buffer_length; ++j) | |
302 | printk ("%02x ", data[j]); | |
303 | printk("\n"); | |
304 | } | |
305 | ||
7d12e780 | 306 | static void async_completed(struct urb *urb) |
1da177e4 | 307 | { |
ec17cf1c | 308 | struct async *as = urb->context; |
1da177e4 LT |
309 | struct dev_state *ps = as->ps; |
310 | struct siginfo sinfo; | |
311 | ||
312 | spin_lock(&ps->lock); | |
313 | list_move_tail(&as->asynclist, &ps->async_completed); | |
314 | spin_unlock(&ps->lock); | |
315 | if (as->signr) { | |
316 | sinfo.si_signo = as->signr; | |
317 | sinfo.si_errno = as->urb->status; | |
318 | sinfo.si_code = SI_ASYNCIO; | |
319 | sinfo.si_addr = as->userurb; | |
2425c08b | 320 | kill_pid_info_as_uid(as->signr, &sinfo, as->pid, as->uid, |
7a01955f | 321 | as->euid, as->secid); |
1da177e4 | 322 | } |
e639dd3f GKH |
323 | snoop(&urb->dev->dev, "urb complete\n"); |
324 | snoop_urb(urb, as->userurb); | |
325 | wake_up(&ps->wait); | |
1da177e4 LT |
326 | } |
327 | ||
328 | static void destroy_async (struct dev_state *ps, struct list_head *list) | |
329 | { | |
330 | struct async *as; | |
331 | unsigned long flags; | |
332 | ||
333 | spin_lock_irqsave(&ps->lock, flags); | |
334 | while (!list_empty(list)) { | |
335 | as = list_entry(list->next, struct async, asynclist); | |
336 | list_del_init(&as->asynclist); | |
337 | ||
338 | /* drop the spinlock so the completion handler can run */ | |
339 | spin_unlock_irqrestore(&ps->lock, flags); | |
340 | usb_kill_urb(as->urb); | |
341 | spin_lock_irqsave(&ps->lock, flags); | |
342 | } | |
343 | spin_unlock_irqrestore(&ps->lock, flags); | |
344 | as = async_getcompleted(ps); | |
345 | while (as) { | |
346 | free_async(as); | |
347 | as = async_getcompleted(ps); | |
348 | } | |
349 | } | |
350 | ||
351 | static void destroy_async_on_interface (struct dev_state *ps, unsigned int ifnum) | |
352 | { | |
353 | struct list_head *p, *q, hitlist; | |
354 | unsigned long flags; | |
355 | ||
356 | INIT_LIST_HEAD(&hitlist); | |
357 | spin_lock_irqsave(&ps->lock, flags); | |
358 | list_for_each_safe(p, q, &ps->async_pending) | |
359 | if (ifnum == list_entry(p, struct async, asynclist)->ifnum) | |
360 | list_move_tail(p, &hitlist); | |
361 | spin_unlock_irqrestore(&ps->lock, flags); | |
362 | destroy_async(ps, &hitlist); | |
363 | } | |
364 | ||
365 | static inline void destroy_all_async(struct dev_state *ps) | |
366 | { | |
367 | destroy_async(ps, &ps->async_pending); | |
368 | } | |
369 | ||
370 | /* | |
371 | * interface claims are made only at the request of user level code, | |
372 | * which can also release them (explicitly or by closing files). | |
373 | * they're also undone when devices disconnect. | |
374 | */ | |
375 | ||
376 | static int driver_probe (struct usb_interface *intf, | |
377 | const struct usb_device_id *id) | |
378 | { | |
379 | return -ENODEV; | |
380 | } | |
381 | ||
382 | static void driver_disconnect(struct usb_interface *intf) | |
383 | { | |
384 | struct dev_state *ps = usb_get_intfdata (intf); | |
385 | unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber; | |
386 | ||
387 | if (!ps) | |
388 | return; | |
389 | ||
390 | /* NOTE: this relies on usbcore having canceled and completed | |
391 | * all pending I/O requests; 2.6 does that. | |
392 | */ | |
393 | ||
394 | if (likely(ifnum < 8*sizeof(ps->ifclaimed))) | |
395 | clear_bit(ifnum, &ps->ifclaimed); | |
396 | else | |
397 | warn("interface number %u out of range", ifnum); | |
398 | ||
399 | usb_set_intfdata (intf, NULL); | |
400 | ||
401 | /* force async requests to complete */ | |
402 | destroy_async_on_interface(ps, ifnum); | |
403 | } | |
404 | ||
405 | struct usb_driver usbfs_driver = { | |
1da177e4 LT |
406 | .name = "usbfs", |
407 | .probe = driver_probe, | |
408 | .disconnect = driver_disconnect, | |
409 | }; | |
410 | ||
411 | static int claimintf(struct dev_state *ps, unsigned int ifnum) | |
412 | { | |
413 | struct usb_device *dev = ps->dev; | |
414 | struct usb_interface *intf; | |
415 | int err; | |
416 | ||
417 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
418 | return -EINVAL; | |
419 | /* already claimed */ | |
420 | if (test_bit(ifnum, &ps->ifclaimed)) | |
421 | return 0; | |
422 | ||
1da177e4 LT |
423 | intf = usb_ifnum_to_if(dev, ifnum); |
424 | if (!intf) | |
425 | err = -ENOENT; | |
426 | else | |
427 | err = usb_driver_claim_interface(&usbfs_driver, intf, ps); | |
1da177e4 LT |
428 | if (err == 0) |
429 | set_bit(ifnum, &ps->ifclaimed); | |
430 | return err; | |
431 | } | |
432 | ||
433 | static int releaseintf(struct dev_state *ps, unsigned int ifnum) | |
434 | { | |
435 | struct usb_device *dev; | |
436 | struct usb_interface *intf; | |
437 | int err; | |
438 | ||
439 | err = -EINVAL; | |
440 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
441 | return err; | |
442 | dev = ps->dev; | |
1da177e4 LT |
443 | intf = usb_ifnum_to_if(dev, ifnum); |
444 | if (!intf) | |
445 | err = -ENOENT; | |
446 | else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) { | |
447 | usb_driver_release_interface(&usbfs_driver, intf); | |
448 | err = 0; | |
449 | } | |
1da177e4 LT |
450 | return err; |
451 | } | |
452 | ||
453 | static int checkintf(struct dev_state *ps, unsigned int ifnum) | |
454 | { | |
455 | if (ps->dev->state != USB_STATE_CONFIGURED) | |
456 | return -EHOSTUNREACH; | |
457 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
458 | return -EINVAL; | |
459 | if (test_bit(ifnum, &ps->ifclaimed)) | |
460 | return 0; | |
461 | /* if not yet claimed, claim it for the driver */ | |
462 | dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim interface %u before use\n", | |
463 | current->pid, current->comm, ifnum); | |
464 | return claimintf(ps, ifnum); | |
465 | } | |
466 | ||
467 | static int findintfep(struct usb_device *dev, unsigned int ep) | |
468 | { | |
469 | unsigned int i, j, e; | |
470 | struct usb_interface *intf; | |
471 | struct usb_host_interface *alts; | |
472 | struct usb_endpoint_descriptor *endpt; | |
473 | ||
474 | if (ep & ~(USB_DIR_IN|0xf)) | |
475 | return -EINVAL; | |
476 | if (!dev->actconfig) | |
477 | return -ESRCH; | |
478 | for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) { | |
479 | intf = dev->actconfig->interface[i]; | |
480 | for (j = 0; j < intf->num_altsetting; j++) { | |
481 | alts = &intf->altsetting[j]; | |
482 | for (e = 0; e < alts->desc.bNumEndpoints; e++) { | |
483 | endpt = &alts->endpoint[e].desc; | |
484 | if (endpt->bEndpointAddress == ep) | |
485 | return alts->desc.bInterfaceNumber; | |
486 | } | |
487 | } | |
488 | } | |
489 | return -ENOENT; | |
490 | } | |
491 | ||
492 | static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype, unsigned int index) | |
493 | { | |
494 | int ret = 0; | |
495 | ||
24f8b116 HS |
496 | if (ps->dev->state != USB_STATE_ADDRESS |
497 | && ps->dev->state != USB_STATE_CONFIGURED) | |
1da177e4 LT |
498 | return -EHOSTUNREACH; |
499 | if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype)) | |
500 | return 0; | |
501 | ||
502 | index &= 0xff; | |
503 | switch (requesttype & USB_RECIP_MASK) { | |
504 | case USB_RECIP_ENDPOINT: | |
505 | if ((ret = findintfep(ps->dev, index)) >= 0) | |
506 | ret = checkintf(ps, ret); | |
507 | break; | |
508 | ||
509 | case USB_RECIP_INTERFACE: | |
510 | ret = checkintf(ps, index); | |
511 | break; | |
512 | } | |
513 | return ret; | |
514 | } | |
515 | ||
9f8b17e6 | 516 | static int __match_minor(struct device *dev, void *data) |
4592bf5a | 517 | { |
9f8b17e6 | 518 | int minor = *((int *)data); |
4592bf5a | 519 | |
9f8b17e6 KS |
520 | if (dev->devt == MKDEV(USB_DEVICE_MAJOR, minor)) |
521 | return 1; | |
522 | return 0; | |
523 | } | |
4592bf5a | 524 | |
9f8b17e6 KS |
525 | static struct usb_device *usbdev_lookup_by_minor(int minor) |
526 | { | |
527 | struct device *dev; | |
528 | ||
529 | dev = bus_find_device(&usb_bus_type, NULL, &minor, __match_minor); | |
530 | if (!dev) | |
531 | return NULL; | |
532 | put_device(dev); | |
533 | return container_of(dev, struct usb_device, dev); | |
534 | } | |
4592bf5a | 535 | |
1da177e4 LT |
536 | /* |
537 | * file operations | |
538 | */ | |
539 | static int usbdev_open(struct inode *inode, struct file *file) | |
540 | { | |
fbf82fd2 | 541 | struct usb_device *dev = NULL; |
1da177e4 LT |
542 | struct dev_state *ps; |
543 | int ret; | |
544 | ||
4a2a8a2c AS |
545 | /* Protect against simultaneous removal or release */ |
546 | mutex_lock(&usbfs_mutex); | |
547 | ||
1da177e4 LT |
548 | ret = -ENOMEM; |
549 | if (!(ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL))) | |
4a2a8a2c | 550 | goto out; |
1da177e4 | 551 | |
1da177e4 | 552 | ret = -ENOENT; |
9f8b17e6 | 553 | /* usbdev device-node */ |
fbf82fd2 | 554 | if (imajor(inode) == USB_DEVICE_MAJOR) |
9f8b17e6 KS |
555 | dev = usbdev_lookup_by_minor(iminor(inode)); |
556 | #ifdef CONFIG_USB_DEVICEFS | |
557 | /* procfs file */ | |
fbf82fd2 | 558 | if (!dev) |
8e18e294 | 559 | dev = inode->i_private; |
9f8b17e6 | 560 | #endif |
01d883d4 | 561 | if (!dev) |
1da177e4 | 562 | goto out; |
94fcda1f | 563 | ret = usb_autoresume_device(dev); |
01d883d4 AS |
564 | if (ret) |
565 | goto out; | |
566 | ||
fbf82fd2 | 567 | usb_get_dev(dev); |
1da177e4 LT |
568 | ret = 0; |
569 | ps->dev = dev; | |
570 | ps->file = file; | |
571 | spin_lock_init(&ps->lock); | |
316547fd | 572 | INIT_LIST_HEAD(&ps->list); |
1da177e4 LT |
573 | INIT_LIST_HEAD(&ps->async_pending); |
574 | INIT_LIST_HEAD(&ps->async_completed); | |
575 | init_waitqueue_head(&ps->wait); | |
576 | ps->discsignr = 0; | |
2425c08b | 577 | ps->disc_pid = get_pid(task_pid(current)); |
d7dd8a72 LT |
578 | ps->disc_uid = current->uid; |
579 | ps->disc_euid = current->euid; | |
1da177e4 LT |
580 | ps->disccontext = NULL; |
581 | ps->ifclaimed = 0; | |
7a01955f | 582 | security_task_getsecid(current, &ps->secid); |
1da177e4 LT |
583 | wmb(); |
584 | list_add_tail(&ps->list, &dev->filelist); | |
585 | file->private_data = ps; | |
586 | out: | |
01d883d4 AS |
587 | if (ret) |
588 | kfree(ps); | |
4a2a8a2c AS |
589 | mutex_unlock(&usbfs_mutex); |
590 | return ret; | |
1da177e4 LT |
591 | } |
592 | ||
593 | static int usbdev_release(struct inode *inode, struct file *file) | |
594 | { | |
ec17cf1c | 595 | struct dev_state *ps = file->private_data; |
1da177e4 LT |
596 | struct usb_device *dev = ps->dev; |
597 | unsigned int ifnum; | |
598 | ||
599 | usb_lock_device(dev); | |
4a2a8a2c AS |
600 | |
601 | /* Protect against simultaneous open */ | |
602 | mutex_lock(&usbfs_mutex); | |
1da177e4 | 603 | list_del_init(&ps->list); |
4a2a8a2c AS |
604 | mutex_unlock(&usbfs_mutex); |
605 | ||
1da177e4 LT |
606 | for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed); |
607 | ifnum++) { | |
608 | if (test_bit(ifnum, &ps->ifclaimed)) | |
609 | releaseintf(ps, ifnum); | |
610 | } | |
611 | destroy_all_async(ps); | |
94fcda1f | 612 | usb_autosuspend_device(dev); |
1da177e4 LT |
613 | usb_unlock_device(dev); |
614 | usb_put_dev(dev); | |
2425c08b | 615 | put_pid(ps->disc_pid); |
1da177e4 | 616 | kfree(ps); |
4a2a8a2c | 617 | return 0; |
1da177e4 LT |
618 | } |
619 | ||
620 | static int proc_control(struct dev_state *ps, void __user *arg) | |
621 | { | |
622 | struct usb_device *dev = ps->dev; | |
623 | struct usbdevfs_ctrltransfer ctrl; | |
624 | unsigned int tmo; | |
625 | unsigned char *tbuf; | |
626 | int i, j, ret; | |
627 | ||
628 | if (copy_from_user(&ctrl, arg, sizeof(ctrl))) | |
629 | return -EFAULT; | |
630 | if ((ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.wIndex))) | |
631 | return ret; | |
632 | if (ctrl.wLength > PAGE_SIZE) | |
633 | return -EINVAL; | |
634 | if (!(tbuf = (unsigned char *)__get_free_page(GFP_KERNEL))) | |
635 | return -ENOMEM; | |
636 | tmo = ctrl.timeout; | |
637 | if (ctrl.bRequestType & 0x80) { | |
638 | if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data, ctrl.wLength)) { | |
639 | free_page((unsigned long)tbuf); | |
640 | return -EINVAL; | |
641 | } | |
fe0410c7 AS |
642 | snoop(&dev->dev, "control read: bRequest=%02x " |
643 | "bRrequestType=%02x wValue=%04x " | |
644 | "wIndex=%04x wLength=%04x\n", | |
645 | ctrl.bRequest, ctrl.bRequestType, ctrl.wValue, | |
646 | ctrl.wIndex, ctrl.wLength); | |
1da177e4 LT |
647 | |
648 | usb_unlock_device(dev); | |
649 | i = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType, | |
650 | ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo); | |
651 | usb_lock_device(dev); | |
652 | if ((i > 0) && ctrl.wLength) { | |
653 | if (usbfs_snoop) { | |
654 | dev_info(&dev->dev, "control read: data "); | |
fe0410c7 | 655 | for (j = 0; j < i; ++j) |
e639dd3f | 656 | printk("%02x ", (unsigned char)(tbuf)[j]); |
1da177e4 LT |
657 | printk("\n"); |
658 | } | |
fe0410c7 | 659 | if (copy_to_user(ctrl.data, tbuf, i)) { |
1da177e4 LT |
660 | free_page((unsigned long)tbuf); |
661 | return -EFAULT; | |
662 | } | |
663 | } | |
664 | } else { | |
665 | if (ctrl.wLength) { | |
666 | if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) { | |
667 | free_page((unsigned long)tbuf); | |
668 | return -EFAULT; | |
669 | } | |
670 | } | |
fe0410c7 AS |
671 | snoop(&dev->dev, "control write: bRequest=%02x " |
672 | "bRrequestType=%02x wValue=%04x " | |
673 | "wIndex=%04x wLength=%04x\n", | |
674 | ctrl.bRequest, ctrl.bRequestType, ctrl.wValue, | |
675 | ctrl.wIndex, ctrl.wLength); | |
1da177e4 LT |
676 | if (usbfs_snoop) { |
677 | dev_info(&dev->dev, "control write: data: "); | |
678 | for (j = 0; j < ctrl.wLength; ++j) | |
e639dd3f | 679 | printk("%02x ", (unsigned char)(tbuf)[j]); |
1da177e4 LT |
680 | printk("\n"); |
681 | } | |
682 | usb_unlock_device(dev); | |
683 | i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType, | |
684 | ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo); | |
685 | usb_lock_device(dev); | |
686 | } | |
687 | free_page((unsigned long)tbuf); | |
688 | if (i<0 && i != -EPIPE) { | |
689 | dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL " | |
690 | "failed cmd %s rqt %u rq %u len %u ret %d\n", | |
691 | current->comm, ctrl.bRequestType, ctrl.bRequest, | |
692 | ctrl.wLength, i); | |
693 | } | |
694 | return i; | |
695 | } | |
696 | ||
697 | static int proc_bulk(struct dev_state *ps, void __user *arg) | |
698 | { | |
699 | struct usb_device *dev = ps->dev; | |
700 | struct usbdevfs_bulktransfer bulk; | |
701 | unsigned int tmo, len1, pipe; | |
702 | int len2; | |
703 | unsigned char *tbuf; | |
e639dd3f | 704 | int i, j, ret; |
1da177e4 LT |
705 | |
706 | if (copy_from_user(&bulk, arg, sizeof(bulk))) | |
707 | return -EFAULT; | |
708 | if ((ret = findintfep(ps->dev, bulk.ep)) < 0) | |
709 | return ret; | |
710 | if ((ret = checkintf(ps, ret))) | |
711 | return ret; | |
712 | if (bulk.ep & USB_DIR_IN) | |
713 | pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f); | |
714 | else | |
715 | pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f); | |
716 | if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN))) | |
717 | return -EINVAL; | |
718 | len1 = bulk.len; | |
719 | if (len1 > MAX_USBFS_BUFFER_SIZE) | |
720 | return -EINVAL; | |
721 | if (!(tbuf = kmalloc(len1, GFP_KERNEL))) | |
722 | return -ENOMEM; | |
723 | tmo = bulk.timeout; | |
724 | if (bulk.ep & 0x80) { | |
725 | if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) { | |
726 | kfree(tbuf); | |
727 | return -EINVAL; | |
728 | } | |
e639dd3f GKH |
729 | snoop(&dev->dev, "bulk read: len=0x%02x timeout=%04d\n", |
730 | bulk.len, bulk.timeout); | |
1da177e4 LT |
731 | usb_unlock_device(dev); |
732 | i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo); | |
733 | usb_lock_device(dev); | |
734 | if (!i && len2) { | |
e639dd3f GKH |
735 | if (usbfs_snoop) { |
736 | dev_info(&dev->dev, "bulk read: data "); | |
737 | for (j = 0; j < len2; ++j) | |
738 | printk("%02x ", (unsigned char)(tbuf)[j]); | |
739 | printk("\n"); | |
740 | } | |
1da177e4 LT |
741 | if (copy_to_user(bulk.data, tbuf, len2)) { |
742 | kfree(tbuf); | |
743 | return -EFAULT; | |
744 | } | |
745 | } | |
746 | } else { | |
747 | if (len1) { | |
748 | if (copy_from_user(tbuf, bulk.data, len1)) { | |
749 | kfree(tbuf); | |
750 | return -EFAULT; | |
751 | } | |
752 | } | |
e639dd3f GKH |
753 | snoop(&dev->dev, "bulk write: len=0x%02x timeout=%04d\n", |
754 | bulk.len, bulk.timeout); | |
755 | if (usbfs_snoop) { | |
756 | dev_info(&dev->dev, "bulk write: data: "); | |
757 | for (j = 0; j < len1; ++j) | |
758 | printk("%02x ", (unsigned char)(tbuf)[j]); | |
759 | printk("\n"); | |
760 | } | |
1da177e4 LT |
761 | usb_unlock_device(dev); |
762 | i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo); | |
763 | usb_lock_device(dev); | |
764 | } | |
765 | kfree(tbuf); | |
766 | if (i < 0) | |
767 | return i; | |
768 | return len2; | |
769 | } | |
770 | ||
771 | static int proc_resetep(struct dev_state *ps, void __user *arg) | |
772 | { | |
773 | unsigned int ep; | |
774 | int ret; | |
775 | ||
776 | if (get_user(ep, (unsigned int __user *)arg)) | |
777 | return -EFAULT; | |
778 | if ((ret = findintfep(ps->dev, ep)) < 0) | |
779 | return ret; | |
780 | if ((ret = checkintf(ps, ret))) | |
781 | return ret; | |
782 | usb_settoggle(ps->dev, ep & 0xf, !(ep & USB_DIR_IN), 0); | |
783 | return 0; | |
784 | } | |
785 | ||
786 | static int proc_clearhalt(struct dev_state *ps, void __user *arg) | |
787 | { | |
788 | unsigned int ep; | |
789 | int pipe; | |
790 | int ret; | |
791 | ||
792 | if (get_user(ep, (unsigned int __user *)arg)) | |
793 | return -EFAULT; | |
794 | if ((ret = findintfep(ps->dev, ep)) < 0) | |
795 | return ret; | |
796 | if ((ret = checkintf(ps, ret))) | |
797 | return ret; | |
798 | if (ep & USB_DIR_IN) | |
799 | pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f); | |
800 | else | |
801 | pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f); | |
802 | ||
803 | return usb_clear_halt(ps->dev, pipe); | |
804 | } | |
805 | ||
806 | ||
807 | static int proc_getdriver(struct dev_state *ps, void __user *arg) | |
808 | { | |
809 | struct usbdevfs_getdriver gd; | |
810 | struct usb_interface *intf; | |
811 | int ret; | |
812 | ||
813 | if (copy_from_user(&gd, arg, sizeof(gd))) | |
814 | return -EFAULT; | |
1da177e4 LT |
815 | intf = usb_ifnum_to_if(ps->dev, gd.interface); |
816 | if (!intf || !intf->dev.driver) | |
817 | ret = -ENODATA; | |
818 | else { | |
819 | strncpy(gd.driver, intf->dev.driver->name, | |
820 | sizeof(gd.driver)); | |
821 | ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0); | |
822 | } | |
1da177e4 LT |
823 | return ret; |
824 | } | |
825 | ||
826 | static int proc_connectinfo(struct dev_state *ps, void __user *arg) | |
827 | { | |
828 | struct usbdevfs_connectinfo ci; | |
829 | ||
830 | ci.devnum = ps->dev->devnum; | |
831 | ci.slow = ps->dev->speed == USB_SPEED_LOW; | |
832 | if (copy_to_user(arg, &ci, sizeof(ci))) | |
833 | return -EFAULT; | |
834 | return 0; | |
835 | } | |
836 | ||
837 | static int proc_resetdevice(struct dev_state *ps) | |
838 | { | |
79efa097 | 839 | return usb_reset_composite_device(ps->dev, NULL); |
1da177e4 LT |
840 | } |
841 | ||
842 | static int proc_setintf(struct dev_state *ps, void __user *arg) | |
843 | { | |
844 | struct usbdevfs_setinterface setintf; | |
845 | int ret; | |
846 | ||
847 | if (copy_from_user(&setintf, arg, sizeof(setintf))) | |
848 | return -EFAULT; | |
849 | if ((ret = checkintf(ps, setintf.interface))) | |
850 | return ret; | |
851 | return usb_set_interface(ps->dev, setintf.interface, | |
852 | setintf.altsetting); | |
853 | } | |
854 | ||
855 | static int proc_setconfig(struct dev_state *ps, void __user *arg) | |
856 | { | |
3f141e2a | 857 | int u; |
1da177e4 LT |
858 | int status = 0; |
859 | struct usb_host_config *actconfig; | |
860 | ||
3f141e2a | 861 | if (get_user(u, (int __user *)arg)) |
1da177e4 LT |
862 | return -EFAULT; |
863 | ||
864 | actconfig = ps->dev->actconfig; | |
865 | ||
866 | /* Don't touch the device if any interfaces are claimed. | |
867 | * It could interfere with other drivers' operations, and if | |
868 | * an interface is claimed by usbfs it could easily deadlock. | |
869 | */ | |
870 | if (actconfig) { | |
871 | int i; | |
872 | ||
873 | for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) { | |
874 | if (usb_interface_claimed(actconfig->interface[i])) { | |
875 | dev_warn (&ps->dev->dev, | |
72ebddb5 | 876 | "usbfs: interface %d claimed by %s " |
1da177e4 LT |
877 | "while '%s' sets config #%d\n", |
878 | actconfig->interface[i] | |
879 | ->cur_altsetting | |
880 | ->desc.bInterfaceNumber, | |
72ebddb5 DB |
881 | actconfig->interface[i] |
882 | ->dev.driver->name, | |
1da177e4 | 883 | current->comm, u); |
1da177e4 LT |
884 | status = -EBUSY; |
885 | break; | |
1da177e4 LT |
886 | } |
887 | } | |
888 | } | |
889 | ||
890 | /* SET_CONFIGURATION is often abused as a "cheap" driver reset, | |
891 | * so avoid usb_set_configuration()'s kick to sysfs | |
892 | */ | |
893 | if (status == 0) { | |
894 | if (actconfig && actconfig->desc.bConfigurationValue == u) | |
895 | status = usb_reset_configuration(ps->dev); | |
896 | else | |
897 | status = usb_set_configuration(ps->dev, u); | |
898 | } | |
899 | ||
900 | return status; | |
901 | } | |
902 | ||
1da177e4 LT |
903 | static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb, |
904 | struct usbdevfs_iso_packet_desc __user *iso_frame_desc, | |
905 | void __user *arg) | |
906 | { | |
907 | struct usbdevfs_iso_packet_desc *isopkt = NULL; | |
908 | struct usb_host_endpoint *ep; | |
909 | struct async *as; | |
910 | struct usb_ctrlrequest *dr = NULL; | |
911 | unsigned int u, totlen, isofrmlen; | |
97b9eb91 | 912 | int ret, ifnum = -1; |
1da177e4 LT |
913 | |
914 | if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP|USBDEVFS_URB_SHORT_NOT_OK| | |
915 | URB_NO_FSBR|URB_ZERO_PACKET)) | |
916 | return -EINVAL; | |
917 | if (!uurb->buffer) | |
918 | return -EINVAL; | |
919 | if (uurb->signr != 0 && (uurb->signr < SIGRTMIN || uurb->signr > SIGRTMAX)) | |
920 | return -EINVAL; | |
921 | if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL && (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) { | |
922 | if ((ifnum = findintfep(ps->dev, uurb->endpoint)) < 0) | |
923 | return ifnum; | |
924 | if ((ret = checkintf(ps, ifnum))) | |
925 | return ret; | |
926 | } | |
927 | if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0) | |
928 | ep = ps->dev->ep_in [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK]; | |
929 | else | |
930 | ep = ps->dev->ep_out [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK]; | |
931 | if (!ep) | |
932 | return -ENOENT; | |
933 | switch(uurb->type) { | |
934 | case USBDEVFS_URB_TYPE_CONTROL: | |
935 | if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) | |
936 | != USB_ENDPOINT_XFER_CONTROL) | |
937 | return -EINVAL; | |
e016683d MD |
938 | /* min 8 byte setup packet, max 8 byte setup plus an arbitrary data stage */ |
939 | if (uurb->buffer_length < 8 || uurb->buffer_length > (8 + MAX_USBFS_BUFFER_SIZE)) | |
1da177e4 LT |
940 | return -EINVAL; |
941 | if (!(dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL))) | |
942 | return -ENOMEM; | |
943 | if (copy_from_user(dr, uurb->buffer, 8)) { | |
944 | kfree(dr); | |
945 | return -EFAULT; | |
946 | } | |
947 | if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) { | |
948 | kfree(dr); | |
949 | return -EINVAL; | |
950 | } | |
951 | if ((ret = check_ctrlrecip(ps, dr->bRequestType, le16_to_cpup(&dr->wIndex)))) { | |
952 | kfree(dr); | |
953 | return ret; | |
954 | } | |
955 | uurb->endpoint = (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) | (dr->bRequestType & USB_ENDPOINT_DIR_MASK); | |
956 | uurb->number_of_packets = 0; | |
957 | uurb->buffer_length = le16_to_cpup(&dr->wLength); | |
958 | uurb->buffer += 8; | |
959 | if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) { | |
960 | kfree(dr); | |
961 | return -EFAULT; | |
962 | } | |
df251b8b CF |
963 | snoop(&ps->dev->dev, "control urb: bRequest=%02x " |
964 | "bRrequestType=%02x wValue=%04x " | |
965 | "wIndex=%04x wLength=%04x\n", | |
966 | dr->bRequest, dr->bRequestType, dr->wValue, | |
967 | dr->wIndex, dr->wLength); | |
1da177e4 LT |
968 | break; |
969 | ||
970 | case USBDEVFS_URB_TYPE_BULK: | |
971 | switch (ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) { | |
972 | case USB_ENDPOINT_XFER_CONTROL: | |
973 | case USB_ENDPOINT_XFER_ISOC: | |
974 | return -EINVAL; | |
975 | /* allow single-shot interrupt transfers, at bogus rates */ | |
976 | } | |
977 | uurb->number_of_packets = 0; | |
978 | if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE) | |
979 | return -EINVAL; | |
980 | if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) | |
981 | return -EFAULT; | |
e639dd3f | 982 | snoop(&ps->dev->dev, "bulk urb\n"); |
1da177e4 LT |
983 | break; |
984 | ||
985 | case USBDEVFS_URB_TYPE_ISO: | |
986 | /* arbitrary limit */ | |
987 | if (uurb->number_of_packets < 1 || uurb->number_of_packets > 128) | |
988 | return -EINVAL; | |
989 | if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) | |
990 | != USB_ENDPOINT_XFER_ISOC) | |
991 | return -EINVAL; | |
1da177e4 LT |
992 | isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * uurb->number_of_packets; |
993 | if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL))) | |
994 | return -ENOMEM; | |
995 | if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) { | |
996 | kfree(isopkt); | |
997 | return -EFAULT; | |
998 | } | |
999 | for (totlen = u = 0; u < uurb->number_of_packets; u++) { | |
3612242e MD |
1000 | /* arbitrary limit, sufficient for USB 2.0 high-bandwidth iso */ |
1001 | if (isopkt[u].length > 8192) { | |
1da177e4 LT |
1002 | kfree(isopkt); |
1003 | return -EINVAL; | |
1004 | } | |
1005 | totlen += isopkt[u].length; | |
1006 | } | |
1007 | if (totlen > 32768) { | |
1008 | kfree(isopkt); | |
1009 | return -EINVAL; | |
1010 | } | |
1011 | uurb->buffer_length = totlen; | |
e639dd3f | 1012 | snoop(&ps->dev->dev, "iso urb\n"); |
1da177e4 LT |
1013 | break; |
1014 | ||
1015 | case USBDEVFS_URB_TYPE_INTERRUPT: | |
1016 | uurb->number_of_packets = 0; | |
1017 | if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) | |
1018 | != USB_ENDPOINT_XFER_INT) | |
1019 | return -EINVAL; | |
1da177e4 LT |
1020 | if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE) |
1021 | return -EINVAL; | |
1022 | if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) | |
1023 | return -EFAULT; | |
e639dd3f | 1024 | snoop(&ps->dev->dev, "interrupt urb\n"); |
1da177e4 LT |
1025 | break; |
1026 | ||
1027 | default: | |
1028 | return -EINVAL; | |
1029 | } | |
1030 | if (!(as = alloc_async(uurb->number_of_packets))) { | |
6fd19f4b JJ |
1031 | kfree(isopkt); |
1032 | kfree(dr); | |
1da177e4 LT |
1033 | return -ENOMEM; |
1034 | } | |
1035 | if (!(as->urb->transfer_buffer = kmalloc(uurb->buffer_length, GFP_KERNEL))) { | |
6fd19f4b JJ |
1036 | kfree(isopkt); |
1037 | kfree(dr); | |
1da177e4 LT |
1038 | free_async(as); |
1039 | return -ENOMEM; | |
1040 | } | |
1041 | as->urb->dev = ps->dev; | |
1042 | as->urb->pipe = (uurb->type << 30) | __create_pipe(ps->dev, uurb->endpoint & 0xf) | (uurb->endpoint & USB_DIR_IN); | |
1043 | as->urb->transfer_flags = uurb->flags; | |
1044 | as->urb->transfer_buffer_length = uurb->buffer_length; | |
1045 | as->urb->setup_packet = (unsigned char*)dr; | |
1046 | as->urb->start_frame = uurb->start_frame; | |
1047 | as->urb->number_of_packets = uurb->number_of_packets; | |
97b9eb91 AS |
1048 | if (uurb->type == USBDEVFS_URB_TYPE_ISO || |
1049 | ps->dev->speed == USB_SPEED_HIGH) | |
1050 | as->urb->interval = 1 << min(15, ep->desc.bInterval - 1); | |
1051 | else | |
1052 | as->urb->interval = ep->desc.bInterval; | |
1da177e4 LT |
1053 | as->urb->context = as; |
1054 | as->urb->complete = async_completed; | |
1055 | for (totlen = u = 0; u < uurb->number_of_packets; u++) { | |
1056 | as->urb->iso_frame_desc[u].offset = totlen; | |
1057 | as->urb->iso_frame_desc[u].length = isopkt[u].length; | |
1058 | totlen += isopkt[u].length; | |
1059 | } | |
6fd19f4b | 1060 | kfree(isopkt); |
1da177e4 LT |
1061 | as->ps = ps; |
1062 | as->userurb = arg; | |
1063 | if (uurb->endpoint & USB_DIR_IN) | |
1064 | as->userbuffer = uurb->buffer; | |
1065 | else | |
1066 | as->userbuffer = NULL; | |
1067 | as->signr = uurb->signr; | |
1068 | as->ifnum = ifnum; | |
2425c08b | 1069 | as->pid = get_pid(task_pid(current)); |
46113830 HW |
1070 | as->uid = current->uid; |
1071 | as->euid = current->euid; | |
7a01955f | 1072 | security_task_getsecid(current, &as->secid); |
1da177e4 LT |
1073 | if (!(uurb->endpoint & USB_DIR_IN)) { |
1074 | if (copy_from_user(as->urb->transfer_buffer, uurb->buffer, as->urb->transfer_buffer_length)) { | |
1075 | free_async(as); | |
1076 | return -EFAULT; | |
1077 | } | |
1078 | } | |
e639dd3f GKH |
1079 | snoop(&as->urb->dev->dev, "submit urb\n"); |
1080 | snoop_urb(as->urb, as->userurb); | |
1da177e4 LT |
1081 | async_newpending(as); |
1082 | if ((ret = usb_submit_urb(as->urb, GFP_KERNEL))) { | |
1083 | dev_printk(KERN_DEBUG, &ps->dev->dev, "usbfs: usb_submit_urb returned %d\n", ret); | |
1084 | async_removepending(as); | |
1085 | free_async(as); | |
1086 | return ret; | |
1087 | } | |
1088 | return 0; | |
1089 | } | |
1090 | ||
1091 | static int proc_submiturb(struct dev_state *ps, void __user *arg) | |
1092 | { | |
1093 | struct usbdevfs_urb uurb; | |
1094 | ||
1095 | if (copy_from_user(&uurb, arg, sizeof(uurb))) | |
1096 | return -EFAULT; | |
1097 | ||
83626b01 | 1098 | return proc_do_submiturb(ps, &uurb, (((struct usbdevfs_urb __user *)arg)->iso_frame_desc), arg); |
1da177e4 LT |
1099 | } |
1100 | ||
1101 | static int proc_unlinkurb(struct dev_state *ps, void __user *arg) | |
1102 | { | |
1103 | struct async *as; | |
1104 | ||
1105 | as = async_getpending(ps, arg); | |
1106 | if (!as) | |
1107 | return -EINVAL; | |
1108 | usb_kill_urb(as->urb); | |
1109 | return 0; | |
1110 | } | |
1111 | ||
1112 | static int processcompl(struct async *as, void __user * __user *arg) | |
1113 | { | |
1114 | struct urb *urb = as->urb; | |
1115 | struct usbdevfs_urb __user *userurb = as->userurb; | |
1116 | void __user *addr = as->userurb; | |
1117 | unsigned int i; | |
1118 | ||
1119 | if (as->userbuffer) | |
1120 | if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length)) | |
1121 | return -EFAULT; | |
1122 | if (put_user(urb->status, &userurb->status)) | |
1123 | return -EFAULT; | |
1124 | if (put_user(urb->actual_length, &userurb->actual_length)) | |
1125 | return -EFAULT; | |
1126 | if (put_user(urb->error_count, &userurb->error_count)) | |
1127 | return -EFAULT; | |
1128 | ||
668a9541 CL |
1129 | if (usb_pipeisoc(urb->pipe)) { |
1130 | for (i = 0; i < urb->number_of_packets; i++) { | |
1131 | if (put_user(urb->iso_frame_desc[i].actual_length, | |
1132 | &userurb->iso_frame_desc[i].actual_length)) | |
1133 | return -EFAULT; | |
1134 | if (put_user(urb->iso_frame_desc[i].status, | |
1135 | &userurb->iso_frame_desc[i].status)) | |
1136 | return -EFAULT; | |
1137 | } | |
1da177e4 LT |
1138 | } |
1139 | ||
1140 | free_async(as); | |
1141 | ||
1142 | if (put_user(addr, (void __user * __user *)arg)) | |
1143 | return -EFAULT; | |
1144 | return 0; | |
1145 | } | |
1146 | ||
1147 | static struct async* reap_as(struct dev_state *ps) | |
1148 | { | |
1149 | DECLARE_WAITQUEUE(wait, current); | |
1150 | struct async *as = NULL; | |
1151 | struct usb_device *dev = ps->dev; | |
1152 | ||
1153 | add_wait_queue(&ps->wait, &wait); | |
1154 | for (;;) { | |
1155 | __set_current_state(TASK_INTERRUPTIBLE); | |
1156 | if ((as = async_getcompleted(ps))) | |
1157 | break; | |
1158 | if (signal_pending(current)) | |
1159 | break; | |
1160 | usb_unlock_device(dev); | |
1161 | schedule(); | |
1162 | usb_lock_device(dev); | |
1163 | } | |
1164 | remove_wait_queue(&ps->wait, &wait); | |
1165 | set_current_state(TASK_RUNNING); | |
1166 | return as; | |
1167 | } | |
1168 | ||
1169 | static int proc_reapurb(struct dev_state *ps, void __user *arg) | |
1170 | { | |
1171 | struct async *as = reap_as(ps); | |
1172 | if (as) | |
1173 | return processcompl(as, (void __user * __user *)arg); | |
1174 | if (signal_pending(current)) | |
1175 | return -EINTR; | |
1176 | return -EIO; | |
1177 | } | |
1178 | ||
1179 | static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg) | |
1180 | { | |
1181 | struct async *as; | |
1182 | ||
1183 | if (!(as = async_getcompleted(ps))) | |
1184 | return -EAGAIN; | |
1185 | return processcompl(as, (void __user * __user *)arg); | |
1186 | } | |
1187 | ||
1188 | #ifdef CONFIG_COMPAT | |
1189 | ||
1190 | static int get_urb32(struct usbdevfs_urb *kurb, | |
1191 | struct usbdevfs_urb32 __user *uurb) | |
1192 | { | |
1193 | __u32 uptr; | |
1194 | if (get_user(kurb->type, &uurb->type) || | |
1195 | __get_user(kurb->endpoint, &uurb->endpoint) || | |
1196 | __get_user(kurb->status, &uurb->status) || | |
1197 | __get_user(kurb->flags, &uurb->flags) || | |
1198 | __get_user(kurb->buffer_length, &uurb->buffer_length) || | |
1199 | __get_user(kurb->actual_length, &uurb->actual_length) || | |
1200 | __get_user(kurb->start_frame, &uurb->start_frame) || | |
1201 | __get_user(kurb->number_of_packets, &uurb->number_of_packets) || | |
1202 | __get_user(kurb->error_count, &uurb->error_count) || | |
1203 | __get_user(kurb->signr, &uurb->signr)) | |
1204 | return -EFAULT; | |
1205 | ||
1206 | if (__get_user(uptr, &uurb->buffer)) | |
1207 | return -EFAULT; | |
1208 | kurb->buffer = compat_ptr(uptr); | |
1209 | if (__get_user(uptr, &uurb->buffer)) | |
1210 | return -EFAULT; | |
1211 | kurb->usercontext = compat_ptr(uptr); | |
1212 | ||
1213 | return 0; | |
1214 | } | |
1215 | ||
1216 | static int proc_submiturb_compat(struct dev_state *ps, void __user *arg) | |
1217 | { | |
1218 | struct usbdevfs_urb uurb; | |
1219 | ||
c714de5d | 1220 | if (get_urb32(&uurb,(struct usbdevfs_urb32 __user *)arg)) |
1da177e4 LT |
1221 | return -EFAULT; |
1222 | ||
83626b01 | 1223 | return proc_do_submiturb(ps, &uurb, ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc, arg); |
1da177e4 LT |
1224 | } |
1225 | ||
1226 | static int processcompl_compat(struct async *as, void __user * __user *arg) | |
1227 | { | |
1228 | struct urb *urb = as->urb; | |
1229 | struct usbdevfs_urb32 __user *userurb = as->userurb; | |
1230 | void __user *addr = as->userurb; | |
1231 | unsigned int i; | |
1232 | ||
1233 | if (as->userbuffer) | |
1234 | if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length)) | |
1235 | return -EFAULT; | |
1236 | if (put_user(urb->status, &userurb->status)) | |
1237 | return -EFAULT; | |
1238 | if (put_user(urb->actual_length, &userurb->actual_length)) | |
1239 | return -EFAULT; | |
1240 | if (put_user(urb->error_count, &userurb->error_count)) | |
1241 | return -EFAULT; | |
1242 | ||
668a9541 CL |
1243 | if (usb_pipeisoc(urb->pipe)) { |
1244 | for (i = 0; i < urb->number_of_packets; i++) { | |
1245 | if (put_user(urb->iso_frame_desc[i].actual_length, | |
1246 | &userurb->iso_frame_desc[i].actual_length)) | |
1247 | return -EFAULT; | |
1248 | if (put_user(urb->iso_frame_desc[i].status, | |
1249 | &userurb->iso_frame_desc[i].status)) | |
1250 | return -EFAULT; | |
1251 | } | |
1da177e4 LT |
1252 | } |
1253 | ||
1254 | free_async(as); | |
c714de5d | 1255 | if (put_user(ptr_to_compat(addr), (u32 __user *)arg)) |
1da177e4 LT |
1256 | return -EFAULT; |
1257 | return 0; | |
1258 | } | |
1259 | ||
1260 | static int proc_reapurb_compat(struct dev_state *ps, void __user *arg) | |
1261 | { | |
1262 | struct async *as = reap_as(ps); | |
1263 | if (as) | |
1264 | return processcompl_compat(as, (void __user * __user *)arg); | |
1265 | if (signal_pending(current)) | |
1266 | return -EINTR; | |
1267 | return -EIO; | |
1268 | } | |
1269 | ||
1270 | static int proc_reapurbnonblock_compat(struct dev_state *ps, void __user *arg) | |
1271 | { | |
1272 | struct async *as; | |
1273 | ||
1da177e4 LT |
1274 | if (!(as = async_getcompleted(ps))) |
1275 | return -EAGAIN; | |
1da177e4 LT |
1276 | return processcompl_compat(as, (void __user * __user *)arg); |
1277 | } | |
1278 | ||
1279 | #endif | |
1280 | ||
1281 | static int proc_disconnectsignal(struct dev_state *ps, void __user *arg) | |
1282 | { | |
1283 | struct usbdevfs_disconnectsignal ds; | |
1284 | ||
1285 | if (copy_from_user(&ds, arg, sizeof(ds))) | |
1286 | return -EFAULT; | |
1287 | if (ds.signr != 0 && (ds.signr < SIGRTMIN || ds.signr > SIGRTMAX)) | |
1288 | return -EINVAL; | |
1289 | ps->discsignr = ds.signr; | |
1290 | ps->disccontext = ds.context; | |
1291 | return 0; | |
1292 | } | |
1293 | ||
1294 | static int proc_claiminterface(struct dev_state *ps, void __user *arg) | |
1295 | { | |
1296 | unsigned int ifnum; | |
1297 | ||
1298 | if (get_user(ifnum, (unsigned int __user *)arg)) | |
1299 | return -EFAULT; | |
1300 | return claimintf(ps, ifnum); | |
1301 | } | |
1302 | ||
1303 | static int proc_releaseinterface(struct dev_state *ps, void __user *arg) | |
1304 | { | |
1305 | unsigned int ifnum; | |
1306 | int ret; | |
1307 | ||
1308 | if (get_user(ifnum, (unsigned int __user *)arg)) | |
1309 | return -EFAULT; | |
1310 | if ((ret = releaseintf(ps, ifnum)) < 0) | |
1311 | return ret; | |
1312 | destroy_async_on_interface (ps, ifnum); | |
1313 | return 0; | |
1314 | } | |
1315 | ||
c36fc889 | 1316 | static int proc_ioctl(struct dev_state *ps, struct usbdevfs_ioctl *ctl) |
1da177e4 | 1317 | { |
1da177e4 LT |
1318 | int size; |
1319 | void *buf = NULL; | |
1320 | int retval = 0; | |
1321 | struct usb_interface *intf = NULL; | |
1322 | struct usb_driver *driver = NULL; | |
1da177e4 | 1323 | |
c36fc889 PZ |
1324 | /* alloc buffer */ |
1325 | if ((size = _IOC_SIZE (ctl->ioctl_code)) > 0) { | |
1da177e4 LT |
1326 | if ((buf = kmalloc (size, GFP_KERNEL)) == NULL) |
1327 | return -ENOMEM; | |
c36fc889 PZ |
1328 | if ((_IOC_DIR(ctl->ioctl_code) & _IOC_WRITE)) { |
1329 | if (copy_from_user (buf, ctl->data, size)) { | |
6fd19f4b | 1330 | kfree(buf); |
1da177e4 LT |
1331 | return -EFAULT; |
1332 | } | |
1333 | } else { | |
1334 | memset (buf, 0, size); | |
1335 | } | |
1336 | } | |
1337 | ||
349710c3 | 1338 | if (!connected(ps)) { |
6fd19f4b | 1339 | kfree(buf); |
1da177e4 LT |
1340 | return -ENODEV; |
1341 | } | |
1342 | ||
1343 | if (ps->dev->state != USB_STATE_CONFIGURED) | |
1344 | retval = -EHOSTUNREACH; | |
c36fc889 | 1345 | else if (!(intf = usb_ifnum_to_if (ps->dev, ctl->ifno))) |
1da177e4 | 1346 | retval = -EINVAL; |
c36fc889 | 1347 | else switch (ctl->ioctl_code) { |
1da177e4 LT |
1348 | |
1349 | /* disconnect kernel driver from interface */ | |
1350 | case USBDEVFS_DISCONNECT: | |
1da177e4 LT |
1351 | if (intf->dev.driver) { |
1352 | driver = to_usb_driver(intf->dev.driver); | |
1353 | dev_dbg (&intf->dev, "disconnect by usbfs\n"); | |
1354 | usb_driver_release_interface(driver, intf); | |
1355 | } else | |
1356 | retval = -ENODATA; | |
1da177e4 LT |
1357 | break; |
1358 | ||
1359 | /* let kernel drivers try to (re)bind to the interface */ | |
1360 | case USBDEVFS_CONNECT: | |
1361 | usb_unlock_device(ps->dev); | |
1b21d5e1 | 1362 | retval = bus_rescan_devices(intf->dev.bus); |
1da177e4 LT |
1363 | usb_lock_device(ps->dev); |
1364 | break; | |
1365 | ||
1366 | /* talk directly to the interface's driver */ | |
1367 | default: | |
1da177e4 LT |
1368 | if (intf->dev.driver) |
1369 | driver = to_usb_driver(intf->dev.driver); | |
1370 | if (driver == NULL || driver->ioctl == NULL) { | |
1371 | retval = -ENOTTY; | |
1372 | } else { | |
c36fc889 | 1373 | retval = driver->ioctl (intf, ctl->ioctl_code, buf); |
1da177e4 LT |
1374 | if (retval == -ENOIOCTLCMD) |
1375 | retval = -ENOTTY; | |
1376 | } | |
1da177e4 LT |
1377 | } |
1378 | ||
1379 | /* cleanup and return */ | |
1380 | if (retval >= 0 | |
c36fc889 | 1381 | && (_IOC_DIR (ctl->ioctl_code) & _IOC_READ) != 0 |
1da177e4 | 1382 | && size > 0 |
c36fc889 | 1383 | && copy_to_user (ctl->data, buf, size) != 0) |
1da177e4 | 1384 | retval = -EFAULT; |
6fd19f4b JJ |
1385 | |
1386 | kfree(buf); | |
1da177e4 LT |
1387 | return retval; |
1388 | } | |
1389 | ||
c36fc889 PZ |
1390 | static int proc_ioctl_default(struct dev_state *ps, void __user *arg) |
1391 | { | |
1392 | struct usbdevfs_ioctl ctrl; | |
1393 | ||
1394 | if (copy_from_user(&ctrl, arg, sizeof (ctrl))) | |
1395 | return -EFAULT; | |
1396 | return proc_ioctl(ps, &ctrl); | |
1397 | } | |
1398 | ||
1399 | #ifdef CONFIG_COMPAT | |
777da590 | 1400 | static int proc_ioctl_compat(struct dev_state *ps, compat_uptr_t arg) |
c36fc889 PZ |
1401 | { |
1402 | struct usbdevfs_ioctl32 __user *uioc; | |
1403 | struct usbdevfs_ioctl ctrl; | |
1404 | u32 udata; | |
1405 | ||
058120d7 | 1406 | uioc = compat_ptr((long)arg); |
c36fc889 PZ |
1407 | if (get_user(ctrl.ifno, &uioc->ifno) || |
1408 | get_user(ctrl.ioctl_code, &uioc->ioctl_code) || | |
1409 | __get_user(udata, &uioc->data)) | |
1410 | return -EFAULT; | |
1411 | ctrl.data = compat_ptr(udata); | |
1412 | ||
1413 | return proc_ioctl(ps, &ctrl); | |
1414 | } | |
1415 | #endif | |
1416 | ||
1da177e4 LT |
1417 | /* |
1418 | * NOTE: All requests here that have interface numbers as parameters | |
1419 | * are assuming that somehow the configuration has been prevented from | |
1420 | * changing. But there's no mechanism to ensure that... | |
1421 | */ | |
1422 | static int usbdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) | |
1423 | { | |
ec17cf1c | 1424 | struct dev_state *ps = file->private_data; |
1da177e4 LT |
1425 | struct usb_device *dev = ps->dev; |
1426 | void __user *p = (void __user *)arg; | |
1427 | int ret = -ENOTTY; | |
1428 | ||
1429 | if (!(file->f_mode & FMODE_WRITE)) | |
1430 | return -EPERM; | |
1431 | usb_lock_device(dev); | |
349710c3 | 1432 | if (!connected(ps)) { |
1da177e4 LT |
1433 | usb_unlock_device(dev); |
1434 | return -ENODEV; | |
1435 | } | |
1436 | ||
1437 | switch (cmd) { | |
1438 | case USBDEVFS_CONTROL: | |
1439 | snoop(&dev->dev, "%s: CONTROL\n", __FUNCTION__); | |
1440 | ret = proc_control(ps, p); | |
1441 | if (ret >= 0) | |
1442 | inode->i_mtime = CURRENT_TIME; | |
1443 | break; | |
1444 | ||
1445 | case USBDEVFS_BULK: | |
1446 | snoop(&dev->dev, "%s: BULK\n", __FUNCTION__); | |
1447 | ret = proc_bulk(ps, p); | |
1448 | if (ret >= 0) | |
1449 | inode->i_mtime = CURRENT_TIME; | |
1450 | break; | |
1451 | ||
1452 | case USBDEVFS_RESETEP: | |
1453 | snoop(&dev->dev, "%s: RESETEP\n", __FUNCTION__); | |
1454 | ret = proc_resetep(ps, p); | |
1455 | if (ret >= 0) | |
1456 | inode->i_mtime = CURRENT_TIME; | |
1457 | break; | |
1458 | ||
1459 | case USBDEVFS_RESET: | |
1460 | snoop(&dev->dev, "%s: RESET\n", __FUNCTION__); | |
1461 | ret = proc_resetdevice(ps); | |
1462 | break; | |
1463 | ||
1464 | case USBDEVFS_CLEAR_HALT: | |
1465 | snoop(&dev->dev, "%s: CLEAR_HALT\n", __FUNCTION__); | |
1466 | ret = proc_clearhalt(ps, p); | |
1467 | if (ret >= 0) | |
1468 | inode->i_mtime = CURRENT_TIME; | |
1469 | break; | |
1470 | ||
1471 | case USBDEVFS_GETDRIVER: | |
1472 | snoop(&dev->dev, "%s: GETDRIVER\n", __FUNCTION__); | |
1473 | ret = proc_getdriver(ps, p); | |
1474 | break; | |
1475 | ||
1476 | case USBDEVFS_CONNECTINFO: | |
1477 | snoop(&dev->dev, "%s: CONNECTINFO\n", __FUNCTION__); | |
1478 | ret = proc_connectinfo(ps, p); | |
1479 | break; | |
1480 | ||
1481 | case USBDEVFS_SETINTERFACE: | |
1482 | snoop(&dev->dev, "%s: SETINTERFACE\n", __FUNCTION__); | |
1483 | ret = proc_setintf(ps, p); | |
1484 | break; | |
1485 | ||
1486 | case USBDEVFS_SETCONFIGURATION: | |
1487 | snoop(&dev->dev, "%s: SETCONFIGURATION\n", __FUNCTION__); | |
1488 | ret = proc_setconfig(ps, p); | |
1489 | break; | |
1490 | ||
1491 | case USBDEVFS_SUBMITURB: | |
1492 | snoop(&dev->dev, "%s: SUBMITURB\n", __FUNCTION__); | |
1493 | ret = proc_submiturb(ps, p); | |
1494 | if (ret >= 0) | |
1495 | inode->i_mtime = CURRENT_TIME; | |
1496 | break; | |
1497 | ||
1498 | #ifdef CONFIG_COMPAT | |
1499 | ||
1500 | case USBDEVFS_SUBMITURB32: | |
1501 | snoop(&dev->dev, "%s: SUBMITURB32\n", __FUNCTION__); | |
1502 | ret = proc_submiturb_compat(ps, p); | |
1503 | if (ret >= 0) | |
1504 | inode->i_mtime = CURRENT_TIME; | |
1505 | break; | |
1506 | ||
1507 | case USBDEVFS_REAPURB32: | |
1508 | snoop(&dev->dev, "%s: REAPURB32\n", __FUNCTION__); | |
1509 | ret = proc_reapurb_compat(ps, p); | |
1510 | break; | |
1511 | ||
1512 | case USBDEVFS_REAPURBNDELAY32: | |
1513 | snoop(&dev->dev, "%s: REAPURBDELAY32\n", __FUNCTION__); | |
1514 | ret = proc_reapurbnonblock_compat(ps, p); | |
1515 | break; | |
1516 | ||
c36fc889 PZ |
1517 | case USBDEVFS_IOCTL32: |
1518 | snoop(&dev->dev, "%s: IOCTL\n", __FUNCTION__); | |
c714de5d | 1519 | ret = proc_ioctl_compat(ps, ptr_to_compat(p)); |
c36fc889 | 1520 | break; |
1da177e4 LT |
1521 | #endif |
1522 | ||
1523 | case USBDEVFS_DISCARDURB: | |
1524 | snoop(&dev->dev, "%s: DISCARDURB\n", __FUNCTION__); | |
1525 | ret = proc_unlinkurb(ps, p); | |
1526 | break; | |
1527 | ||
1528 | case USBDEVFS_REAPURB: | |
1529 | snoop(&dev->dev, "%s: REAPURB\n", __FUNCTION__); | |
1530 | ret = proc_reapurb(ps, p); | |
1531 | break; | |
1532 | ||
1533 | case USBDEVFS_REAPURBNDELAY: | |
1534 | snoop(&dev->dev, "%s: REAPURBDELAY\n", __FUNCTION__); | |
1535 | ret = proc_reapurbnonblock(ps, p); | |
1536 | break; | |
1537 | ||
1538 | case USBDEVFS_DISCSIGNAL: | |
1539 | snoop(&dev->dev, "%s: DISCSIGNAL\n", __FUNCTION__); | |
1540 | ret = proc_disconnectsignal(ps, p); | |
1541 | break; | |
1542 | ||
1543 | case USBDEVFS_CLAIMINTERFACE: | |
1544 | snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __FUNCTION__); | |
1545 | ret = proc_claiminterface(ps, p); | |
1546 | break; | |
1547 | ||
1548 | case USBDEVFS_RELEASEINTERFACE: | |
1549 | snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __FUNCTION__); | |
1550 | ret = proc_releaseinterface(ps, p); | |
1551 | break; | |
1552 | ||
1553 | case USBDEVFS_IOCTL: | |
1554 | snoop(&dev->dev, "%s: IOCTL\n", __FUNCTION__); | |
c36fc889 | 1555 | ret = proc_ioctl_default(ps, p); |
1da177e4 LT |
1556 | break; |
1557 | } | |
1558 | usb_unlock_device(dev); | |
1559 | if (ret >= 0) | |
1560 | inode->i_atime = CURRENT_TIME; | |
1561 | return ret; | |
1562 | } | |
1563 | ||
1564 | /* No kernel lock - fine */ | |
1565 | static unsigned int usbdev_poll(struct file *file, struct poll_table_struct *wait) | |
1566 | { | |
ec17cf1c TK |
1567 | struct dev_state *ps = file->private_data; |
1568 | unsigned int mask = 0; | |
1da177e4 LT |
1569 | |
1570 | poll_wait(file, &ps->wait, wait); | |
1571 | if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed)) | |
1572 | mask |= POLLOUT | POLLWRNORM; | |
349710c3 | 1573 | if (!connected(ps)) |
1da177e4 LT |
1574 | mask |= POLLERR | POLLHUP; |
1575 | return mask; | |
1576 | } | |
1577 | ||
9f8b17e6 | 1578 | const struct file_operations usbdev_file_operations = { |
1da177e4 LT |
1579 | .llseek = usbdev_lseek, |
1580 | .read = usbdev_read, | |
1581 | .poll = usbdev_poll, | |
1582 | .ioctl = usbdev_ioctl, | |
1583 | .open = usbdev_open, | |
1584 | .release = usbdev_release, | |
1585 | }; | |
fbf82fd2 | 1586 | |
9f8b17e6 KS |
1587 | #ifdef CONFIG_USB_DEVICE_CLASS |
1588 | static struct class *usb_classdev_class; | |
1589 | ||
1590 | static int usb_classdev_add(struct usb_device *dev) | |
fbf82fd2 KS |
1591 | { |
1592 | int minor = ((dev->bus->busnum-1) * 128) + (dev->devnum-1); | |
1593 | ||
9f8b17e6 | 1594 | dev->usb_classdev = device_create(usb_classdev_class, &dev->dev, |
7bc3d635 | 1595 | MKDEV(USB_DEVICE_MAJOR, minor), |
fbf82fd2 | 1596 | "usbdev%d.%d", dev->bus->busnum, dev->devnum); |
9f8b17e6 KS |
1597 | if (IS_ERR(dev->usb_classdev)) |
1598 | return PTR_ERR(dev->usb_classdev); | |
fbf82fd2 | 1599 | |
27d39e26 | 1600 | return 0; |
fbf82fd2 KS |
1601 | } |
1602 | ||
9f8b17e6 | 1603 | static void usb_classdev_remove(struct usb_device *dev) |
fbf82fd2 | 1604 | { |
9f8b17e6 | 1605 | device_unregister(dev->usb_classdev); |
fbf82fd2 KS |
1606 | } |
1607 | ||
9f8b17e6 KS |
1608 | static int usb_classdev_notify(struct notifier_block *self, |
1609 | unsigned long action, void *dev) | |
a7b986b3 GKH |
1610 | { |
1611 | switch (action) { | |
1612 | case USB_DEVICE_ADD: | |
9f8b17e6 | 1613 | if (usb_classdev_add(dev)) |
27d39e26 | 1614 | return NOTIFY_BAD; |
a7b986b3 GKH |
1615 | break; |
1616 | case USB_DEVICE_REMOVE: | |
9f8b17e6 | 1617 | usb_classdev_remove(dev); |
a7b986b3 GKH |
1618 | break; |
1619 | } | |
1620 | return NOTIFY_OK; | |
1621 | } | |
1622 | ||
1623 | static struct notifier_block usbdev_nb = { | |
9f8b17e6 | 1624 | .notifier_call = usb_classdev_notify, |
a7b986b3 | 1625 | }; |
9f8b17e6 | 1626 | #endif |
a7b986b3 | 1627 | |
fbf82fd2 KS |
1628 | static struct cdev usb_device_cdev = { |
1629 | .kobj = {.name = "usb_device", }, | |
1630 | .owner = THIS_MODULE, | |
1631 | }; | |
1632 | ||
9f8b17e6 | 1633 | int __init usb_devio_init(void) |
fbf82fd2 KS |
1634 | { |
1635 | int retval; | |
1636 | ||
fad21bdf AS |
1637 | retval = register_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX, |
1638 | "usb_device"); | |
fbf82fd2 KS |
1639 | if (retval) { |
1640 | err("unable to register minors for usb_device"); | |
1641 | goto out; | |
1642 | } | |
9f8b17e6 | 1643 | cdev_init(&usb_device_cdev, &usbdev_file_operations); |
fad21bdf | 1644 | retval = cdev_add(&usb_device_cdev, USB_DEVICE_DEV, USB_DEVICE_MAX); |
fbf82fd2 KS |
1645 | if (retval) { |
1646 | err("unable to get usb_device major %d", USB_DEVICE_MAJOR); | |
a7b986b3 | 1647 | goto error_cdev; |
fbf82fd2 | 1648 | } |
9f8b17e6 KS |
1649 | #ifdef CONFIG_USB_DEVICE_CLASS |
1650 | usb_classdev_class = class_create(THIS_MODULE, "usb_device"); | |
1651 | if (IS_ERR(usb_classdev_class)) { | |
fbf82fd2 | 1652 | err("unable to register usb_device class"); |
9f8b17e6 KS |
1653 | retval = PTR_ERR(usb_classdev_class); |
1654 | cdev_del(&usb_device_cdev); | |
1655 | usb_classdev_class = NULL; | |
1656 | goto out; | |
fbf82fd2 KS |
1657 | } |
1658 | ||
a7b986b3 | 1659 | usb_register_notify(&usbdev_nb); |
9f8b17e6 | 1660 | #endif |
fbf82fd2 KS |
1661 | out: |
1662 | return retval; | |
a7b986b3 | 1663 | |
a7b986b3 GKH |
1664 | error_cdev: |
1665 | unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX); | |
1666 | goto out; | |
fbf82fd2 KS |
1667 | } |
1668 | ||
9f8b17e6 | 1669 | void usb_devio_cleanup(void) |
fbf82fd2 | 1670 | { |
9f8b17e6 | 1671 | #ifdef CONFIG_USB_DEVICE_CLASS |
a7b986b3 | 1672 | usb_unregister_notify(&usbdev_nb); |
9f8b17e6 KS |
1673 | class_destroy(usb_classdev_class); |
1674 | #endif | |
fbf82fd2 | 1675 | cdev_del(&usb_device_cdev); |
fad21bdf | 1676 | unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX); |
fbf82fd2 | 1677 | } |