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 | |
60 | static struct class *usb_device_class; | |
61 | ||
4a2a8a2c AS |
62 | /* Mutual exclusion for removal, open, and release */ |
63 | DEFINE_MUTEX(usbfs_mutex); | |
64 | ||
1da177e4 LT |
65 | struct async { |
66 | struct list_head asynclist; | |
67 | struct dev_state *ps; | |
2425c08b | 68 | struct pid *pid; |
46113830 | 69 | uid_t uid, euid; |
1da177e4 LT |
70 | unsigned int signr; |
71 | unsigned int ifnum; | |
72 | void __user *userbuffer; | |
73 | void __user *userurb; | |
74 | struct urb *urb; | |
7a01955f | 75 | u32 secid; |
1da177e4 LT |
76 | }; |
77 | ||
78 | static int usbfs_snoop = 0; | |
79 | module_param (usbfs_snoop, bool, S_IRUGO | S_IWUSR); | |
80 | MODULE_PARM_DESC (usbfs_snoop, "true to log all usbfs traffic"); | |
81 | ||
82 | #define snoop(dev, format, arg...) \ | |
83 | do { \ | |
84 | if (usbfs_snoop) \ | |
85 | dev_info( dev , format , ## arg); \ | |
86 | } while (0) | |
87 | ||
fad21bdf AS |
88 | #define USB_DEVICE_DEV MKDEV(USB_DEVICE_MAJOR, 0) |
89 | ||
1da177e4 LT |
90 | |
91 | #define MAX_USBFS_BUFFER_SIZE 16384 | |
92 | ||
349710c3 | 93 | static inline int connected (struct dev_state *ps) |
1da177e4 | 94 | { |
349710c3 AS |
95 | return (!list_empty(&ps->list) && |
96 | ps->dev->state != USB_STATE_NOTATTACHED); | |
1da177e4 LT |
97 | } |
98 | ||
99 | static loff_t usbdev_lseek(struct file *file, loff_t offset, int orig) | |
100 | { | |
101 | loff_t ret; | |
102 | ||
103 | lock_kernel(); | |
104 | ||
105 | switch (orig) { | |
106 | case 0: | |
107 | file->f_pos = offset; | |
108 | ret = file->f_pos; | |
109 | break; | |
110 | case 1: | |
111 | file->f_pos += offset; | |
112 | ret = file->f_pos; | |
113 | break; | |
114 | case 2: | |
115 | default: | |
116 | ret = -EINVAL; | |
117 | } | |
118 | ||
119 | unlock_kernel(); | |
120 | return ret; | |
121 | } | |
122 | ||
123 | static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos) | |
124 | { | |
ec17cf1c | 125 | struct dev_state *ps = file->private_data; |
1da177e4 LT |
126 | struct usb_device *dev = ps->dev; |
127 | ssize_t ret = 0; | |
128 | unsigned len; | |
129 | loff_t pos; | |
130 | int i; | |
131 | ||
132 | pos = *ppos; | |
133 | usb_lock_device(dev); | |
349710c3 | 134 | if (!connected(ps)) { |
1da177e4 LT |
135 | ret = -ENODEV; |
136 | goto err; | |
137 | } else if (pos < 0) { | |
138 | ret = -EINVAL; | |
139 | goto err; | |
140 | } | |
141 | ||
142 | if (pos < sizeof(struct usb_device_descriptor)) { | |
8781ba0a ON |
143 | struct usb_device_descriptor temp_desc ; /* 18 bytes - fits on the stack */ |
144 | ||
145 | memcpy(&temp_desc, &dev->descriptor, sizeof(dev->descriptor)); | |
9fcd5c32 AM |
146 | le16_to_cpus(&temp_desc.bcdUSB); |
147 | le16_to_cpus(&temp_desc.idVendor); | |
148 | le16_to_cpus(&temp_desc.idProduct); | |
149 | le16_to_cpus(&temp_desc.bcdDevice); | |
1da177e4 LT |
150 | |
151 | len = sizeof(struct usb_device_descriptor) - pos; | |
152 | if (len > nbytes) | |
153 | len = nbytes; | |
8781ba0a | 154 | if (copy_to_user(buf, ((char *)&temp_desc) + pos, len)) { |
1da177e4 LT |
155 | ret = -EFAULT; |
156 | goto err; | |
157 | } | |
1da177e4 LT |
158 | |
159 | *ppos += len; | |
160 | buf += len; | |
161 | nbytes -= len; | |
162 | ret += len; | |
163 | } | |
164 | ||
165 | pos = sizeof(struct usb_device_descriptor); | |
166 | for (i = 0; nbytes && i < dev->descriptor.bNumConfigurations; i++) { | |
167 | struct usb_config_descriptor *config = | |
168 | (struct usb_config_descriptor *)dev->rawdescriptors[i]; | |
169 | unsigned int length = le16_to_cpu(config->wTotalLength); | |
170 | ||
171 | if (*ppos < pos + length) { | |
172 | ||
173 | /* The descriptor may claim to be longer than it | |
174 | * really is. Here is the actual allocated length. */ | |
175 | unsigned alloclen = | |
176 | le16_to_cpu(dev->config[i].desc.wTotalLength); | |
177 | ||
178 | len = length - (*ppos - pos); | |
179 | if (len > nbytes) | |
180 | len = nbytes; | |
181 | ||
182 | /* Simply don't write (skip over) unallocated parts */ | |
183 | if (alloclen > (*ppos - pos)) { | |
184 | alloclen -= (*ppos - pos); | |
185 | if (copy_to_user(buf, | |
186 | dev->rawdescriptors[i] + (*ppos - pos), | |
187 | min(len, alloclen))) { | |
188 | ret = -EFAULT; | |
189 | goto err; | |
190 | } | |
191 | } | |
192 | ||
193 | *ppos += len; | |
194 | buf += len; | |
195 | nbytes -= len; | |
196 | ret += len; | |
197 | } | |
198 | ||
199 | pos += length; | |
200 | } | |
201 | ||
202 | err: | |
203 | usb_unlock_device(dev); | |
204 | return ret; | |
205 | } | |
206 | ||
207 | /* | |
208 | * async list handling | |
209 | */ | |
210 | ||
211 | static struct async *alloc_async(unsigned int numisoframes) | |
212 | { | |
213 | unsigned int assize = sizeof(struct async) + numisoframes * sizeof(struct usb_iso_packet_descriptor); | |
0a1ef3b5 AS |
214 | struct async *as = kzalloc(assize, GFP_KERNEL); |
215 | ||
1da177e4 LT |
216 | if (!as) |
217 | return NULL; | |
1da177e4 LT |
218 | as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL); |
219 | if (!as->urb) { | |
220 | kfree(as); | |
221 | return NULL; | |
222 | } | |
223 | return as; | |
224 | } | |
225 | ||
226 | static void free_async(struct async *as) | |
227 | { | |
2425c08b | 228 | put_pid(as->pid); |
6fd19f4b JJ |
229 | kfree(as->urb->transfer_buffer); |
230 | kfree(as->urb->setup_packet); | |
1da177e4 | 231 | usb_free_urb(as->urb); |
6fd19f4b | 232 | kfree(as); |
1da177e4 LT |
233 | } |
234 | ||
235 | static inline void async_newpending(struct async *as) | |
236 | { | |
237 | struct dev_state *ps = as->ps; | |
238 | unsigned long flags; | |
239 | ||
240 | spin_lock_irqsave(&ps->lock, flags); | |
241 | list_add_tail(&as->asynclist, &ps->async_pending); | |
242 | spin_unlock_irqrestore(&ps->lock, flags); | |
243 | } | |
244 | ||
245 | static inline void async_removepending(struct async *as) | |
246 | { | |
247 | struct dev_state *ps = as->ps; | |
248 | unsigned long flags; | |
249 | ||
250 | spin_lock_irqsave(&ps->lock, flags); | |
251 | list_del_init(&as->asynclist); | |
252 | spin_unlock_irqrestore(&ps->lock, flags); | |
253 | } | |
254 | ||
255 | static inline struct async *async_getcompleted(struct dev_state *ps) | |
256 | { | |
257 | unsigned long flags; | |
258 | struct async *as = NULL; | |
259 | ||
260 | spin_lock_irqsave(&ps->lock, flags); | |
261 | if (!list_empty(&ps->async_completed)) { | |
262 | as = list_entry(ps->async_completed.next, struct async, asynclist); | |
263 | list_del_init(&as->asynclist); | |
264 | } | |
265 | spin_unlock_irqrestore(&ps->lock, flags); | |
266 | return as; | |
267 | } | |
268 | ||
269 | static inline struct async *async_getpending(struct dev_state *ps, void __user *userurb) | |
270 | { | |
271 | unsigned long flags; | |
272 | struct async *as; | |
273 | ||
274 | spin_lock_irqsave(&ps->lock, flags); | |
275 | list_for_each_entry(as, &ps->async_pending, asynclist) | |
276 | if (as->userurb == userurb) { | |
277 | list_del_init(&as->asynclist); | |
278 | spin_unlock_irqrestore(&ps->lock, flags); | |
279 | return as; | |
280 | } | |
281 | spin_unlock_irqrestore(&ps->lock, flags); | |
282 | return NULL; | |
283 | } | |
284 | ||
e639dd3f GKH |
285 | static void snoop_urb(struct urb *urb, void __user *userurb) |
286 | { | |
287 | int j; | |
288 | unsigned char *data = urb->transfer_buffer; | |
289 | ||
290 | if (!usbfs_snoop) | |
291 | return; | |
292 | ||
293 | if (urb->pipe & USB_DIR_IN) | |
294 | dev_info(&urb->dev->dev, "direction=IN\n"); | |
295 | else | |
296 | dev_info(&urb->dev->dev, "direction=OUT\n"); | |
297 | dev_info(&urb->dev->dev, "userurb=%p\n", userurb); | |
298 | dev_info(&urb->dev->dev, "transfer_buffer_length=%d\n", | |
299 | urb->transfer_buffer_length); | |
300 | dev_info(&urb->dev->dev, "actual_length=%d\n", urb->actual_length); | |
301 | dev_info(&urb->dev->dev, "data: "); | |
302 | for (j = 0; j < urb->transfer_buffer_length; ++j) | |
303 | printk ("%02x ", data[j]); | |
304 | printk("\n"); | |
305 | } | |
306 | ||
7d12e780 | 307 | static void async_completed(struct urb *urb) |
1da177e4 | 308 | { |
ec17cf1c | 309 | struct async *as = urb->context; |
1da177e4 LT |
310 | struct dev_state *ps = as->ps; |
311 | struct siginfo sinfo; | |
312 | ||
313 | spin_lock(&ps->lock); | |
314 | list_move_tail(&as->asynclist, &ps->async_completed); | |
315 | spin_unlock(&ps->lock); | |
316 | if (as->signr) { | |
317 | sinfo.si_signo = as->signr; | |
318 | sinfo.si_errno = as->urb->status; | |
319 | sinfo.si_code = SI_ASYNCIO; | |
320 | sinfo.si_addr = as->userurb; | |
2425c08b | 321 | kill_pid_info_as_uid(as->signr, &sinfo, as->pid, as->uid, |
7a01955f | 322 | as->euid, as->secid); |
1da177e4 | 323 | } |
e639dd3f GKH |
324 | snoop(&urb->dev->dev, "urb complete\n"); |
325 | snoop_urb(urb, as->userurb); | |
326 | wake_up(&ps->wait); | |
1da177e4 LT |
327 | } |
328 | ||
329 | static void destroy_async (struct dev_state *ps, struct list_head *list) | |
330 | { | |
331 | struct async *as; | |
332 | unsigned long flags; | |
333 | ||
334 | spin_lock_irqsave(&ps->lock, flags); | |
335 | while (!list_empty(list)) { | |
336 | as = list_entry(list->next, struct async, asynclist); | |
337 | list_del_init(&as->asynclist); | |
338 | ||
339 | /* drop the spinlock so the completion handler can run */ | |
340 | spin_unlock_irqrestore(&ps->lock, flags); | |
341 | usb_kill_urb(as->urb); | |
342 | spin_lock_irqsave(&ps->lock, flags); | |
343 | } | |
344 | spin_unlock_irqrestore(&ps->lock, flags); | |
345 | as = async_getcompleted(ps); | |
346 | while (as) { | |
347 | free_async(as); | |
348 | as = async_getcompleted(ps); | |
349 | } | |
350 | } | |
351 | ||
352 | static void destroy_async_on_interface (struct dev_state *ps, unsigned int ifnum) | |
353 | { | |
354 | struct list_head *p, *q, hitlist; | |
355 | unsigned long flags; | |
356 | ||
357 | INIT_LIST_HEAD(&hitlist); | |
358 | spin_lock_irqsave(&ps->lock, flags); | |
359 | list_for_each_safe(p, q, &ps->async_pending) | |
360 | if (ifnum == list_entry(p, struct async, asynclist)->ifnum) | |
361 | list_move_tail(p, &hitlist); | |
362 | spin_unlock_irqrestore(&ps->lock, flags); | |
363 | destroy_async(ps, &hitlist); | |
364 | } | |
365 | ||
366 | static inline void destroy_all_async(struct dev_state *ps) | |
367 | { | |
368 | destroy_async(ps, &ps->async_pending); | |
369 | } | |
370 | ||
371 | /* | |
372 | * interface claims are made only at the request of user level code, | |
373 | * which can also release them (explicitly or by closing files). | |
374 | * they're also undone when devices disconnect. | |
375 | */ | |
376 | ||
377 | static int driver_probe (struct usb_interface *intf, | |
378 | const struct usb_device_id *id) | |
379 | { | |
380 | return -ENODEV; | |
381 | } | |
382 | ||
383 | static void driver_disconnect(struct usb_interface *intf) | |
384 | { | |
385 | struct dev_state *ps = usb_get_intfdata (intf); | |
386 | unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber; | |
387 | ||
388 | if (!ps) | |
389 | return; | |
390 | ||
391 | /* NOTE: this relies on usbcore having canceled and completed | |
392 | * all pending I/O requests; 2.6 does that. | |
393 | */ | |
394 | ||
395 | if (likely(ifnum < 8*sizeof(ps->ifclaimed))) | |
396 | clear_bit(ifnum, &ps->ifclaimed); | |
397 | else | |
398 | warn("interface number %u out of range", ifnum); | |
399 | ||
400 | usb_set_intfdata (intf, NULL); | |
401 | ||
402 | /* force async requests to complete */ | |
403 | destroy_async_on_interface(ps, ifnum); | |
404 | } | |
405 | ||
406 | struct usb_driver usbfs_driver = { | |
1da177e4 LT |
407 | .name = "usbfs", |
408 | .probe = driver_probe, | |
409 | .disconnect = driver_disconnect, | |
410 | }; | |
411 | ||
412 | static int claimintf(struct dev_state *ps, unsigned int ifnum) | |
413 | { | |
414 | struct usb_device *dev = ps->dev; | |
415 | struct usb_interface *intf; | |
416 | int err; | |
417 | ||
418 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
419 | return -EINVAL; | |
420 | /* already claimed */ | |
421 | if (test_bit(ifnum, &ps->ifclaimed)) | |
422 | return 0; | |
423 | ||
424 | /* lock against other changes to driver bindings */ | |
425 | down_write(&usb_bus_type.subsys.rwsem); | |
426 | intf = usb_ifnum_to_if(dev, ifnum); | |
427 | if (!intf) | |
428 | err = -ENOENT; | |
429 | else | |
430 | err = usb_driver_claim_interface(&usbfs_driver, intf, ps); | |
431 | up_write(&usb_bus_type.subsys.rwsem); | |
432 | if (err == 0) | |
433 | set_bit(ifnum, &ps->ifclaimed); | |
434 | return err; | |
435 | } | |
436 | ||
437 | static int releaseintf(struct dev_state *ps, unsigned int ifnum) | |
438 | { | |
439 | struct usb_device *dev; | |
440 | struct usb_interface *intf; | |
441 | int err; | |
442 | ||
443 | err = -EINVAL; | |
444 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
445 | return err; | |
446 | dev = ps->dev; | |
447 | /* lock against other changes to driver bindings */ | |
448 | down_write(&usb_bus_type.subsys.rwsem); | |
449 | intf = usb_ifnum_to_if(dev, ifnum); | |
450 | if (!intf) | |
451 | err = -ENOENT; | |
452 | else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) { | |
453 | usb_driver_release_interface(&usbfs_driver, intf); | |
454 | err = 0; | |
455 | } | |
456 | up_write(&usb_bus_type.subsys.rwsem); | |
457 | return err; | |
458 | } | |
459 | ||
460 | static int checkintf(struct dev_state *ps, unsigned int ifnum) | |
461 | { | |
462 | if (ps->dev->state != USB_STATE_CONFIGURED) | |
463 | return -EHOSTUNREACH; | |
464 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
465 | return -EINVAL; | |
466 | if (test_bit(ifnum, &ps->ifclaimed)) | |
467 | return 0; | |
468 | /* if not yet claimed, claim it for the driver */ | |
469 | dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim interface %u before use\n", | |
470 | current->pid, current->comm, ifnum); | |
471 | return claimintf(ps, ifnum); | |
472 | } | |
473 | ||
474 | static int findintfep(struct usb_device *dev, unsigned int ep) | |
475 | { | |
476 | unsigned int i, j, e; | |
477 | struct usb_interface *intf; | |
478 | struct usb_host_interface *alts; | |
479 | struct usb_endpoint_descriptor *endpt; | |
480 | ||
481 | if (ep & ~(USB_DIR_IN|0xf)) | |
482 | return -EINVAL; | |
483 | if (!dev->actconfig) | |
484 | return -ESRCH; | |
485 | for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) { | |
486 | intf = dev->actconfig->interface[i]; | |
487 | for (j = 0; j < intf->num_altsetting; j++) { | |
488 | alts = &intf->altsetting[j]; | |
489 | for (e = 0; e < alts->desc.bNumEndpoints; e++) { | |
490 | endpt = &alts->endpoint[e].desc; | |
491 | if (endpt->bEndpointAddress == ep) | |
492 | return alts->desc.bInterfaceNumber; | |
493 | } | |
494 | } | |
495 | } | |
496 | return -ENOENT; | |
497 | } | |
498 | ||
499 | static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype, unsigned int index) | |
500 | { | |
501 | int ret = 0; | |
502 | ||
24f8b116 HS |
503 | if (ps->dev->state != USB_STATE_ADDRESS |
504 | && ps->dev->state != USB_STATE_CONFIGURED) | |
1da177e4 LT |
505 | return -EHOSTUNREACH; |
506 | if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype)) | |
507 | return 0; | |
508 | ||
509 | index &= 0xff; | |
510 | switch (requesttype & USB_RECIP_MASK) { | |
511 | case USB_RECIP_ENDPOINT: | |
512 | if ((ret = findintfep(ps->dev, index)) >= 0) | |
513 | ret = checkintf(ps, ret); | |
514 | break; | |
515 | ||
516 | case USB_RECIP_INTERFACE: | |
517 | ret = checkintf(ps, index); | |
518 | break; | |
519 | } | |
520 | return ret; | |
521 | } | |
522 | ||
4592bf5a GKH |
523 | static struct usb_device *usbdev_lookup_minor(int minor) |
524 | { | |
cae74b30 GKH |
525 | struct class_device *class_dev; |
526 | struct usb_device *dev = NULL; | |
4592bf5a GKH |
527 | |
528 | down(&usb_device_class->sem); | |
cae74b30 GKH |
529 | list_for_each_entry(class_dev, &usb_device_class->children, node) { |
530 | if (class_dev->devt == MKDEV(USB_DEVICE_MAJOR, minor)) { | |
531 | dev = class_dev->class_data; | |
4592bf5a GKH |
532 | break; |
533 | } | |
534 | } | |
535 | up(&usb_device_class->sem); | |
536 | ||
cae74b30 | 537 | return dev; |
4592bf5a GKH |
538 | }; |
539 | ||
1da177e4 LT |
540 | /* |
541 | * file operations | |
542 | */ | |
543 | static int usbdev_open(struct inode *inode, struct file *file) | |
544 | { | |
fbf82fd2 | 545 | struct usb_device *dev = NULL; |
1da177e4 LT |
546 | struct dev_state *ps; |
547 | int ret; | |
548 | ||
4a2a8a2c AS |
549 | /* Protect against simultaneous removal or release */ |
550 | mutex_lock(&usbfs_mutex); | |
551 | ||
1da177e4 LT |
552 | ret = -ENOMEM; |
553 | if (!(ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL))) | |
4a2a8a2c | 554 | goto out; |
1da177e4 | 555 | |
1da177e4 | 556 | ret = -ENOENT; |
fbf82fd2 KS |
557 | /* check if we are called from a real node or usbfs */ |
558 | if (imajor(inode) == USB_DEVICE_MAJOR) | |
559 | dev = usbdev_lookup_minor(iminor(inode)); | |
560 | if (!dev) | |
8e18e294 | 561 | dev = inode->i_private; |
01d883d4 | 562 | if (!dev) |
1da177e4 | 563 | goto out; |
01d883d4 AS |
564 | ret = usb_autoresume_device(dev, 1); |
565 | if (ret) | |
566 | goto out; | |
567 | ||
fbf82fd2 | 568 | usb_get_dev(dev); |
1da177e4 LT |
569 | ret = 0; |
570 | ps->dev = dev; | |
571 | ps->file = file; | |
572 | spin_lock_init(&ps->lock); | |
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); | |
01d883d4 | 612 | usb_autosuspend_device(dev, 1); |
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; | |
815 | down_read(&usb_bus_type.subsys.rwsem); | |
816 | intf = usb_ifnum_to_if(ps->dev, gd.interface); | |
817 | if (!intf || !intf->dev.driver) | |
818 | ret = -ENODATA; | |
819 | else { | |
820 | strncpy(gd.driver, intf->dev.driver->name, | |
821 | sizeof(gd.driver)); | |
822 | ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0); | |
823 | } | |
824 | up_read(&usb_bus_type.subsys.rwsem); | |
825 | return ret; | |
826 | } | |
827 | ||
828 | static int proc_connectinfo(struct dev_state *ps, void __user *arg) | |
829 | { | |
830 | struct usbdevfs_connectinfo ci; | |
831 | ||
832 | ci.devnum = ps->dev->devnum; | |
833 | ci.slow = ps->dev->speed == USB_SPEED_LOW; | |
834 | if (copy_to_user(arg, &ci, sizeof(ci))) | |
835 | return -EFAULT; | |
836 | return 0; | |
837 | } | |
838 | ||
839 | static int proc_resetdevice(struct dev_state *ps) | |
840 | { | |
79efa097 | 841 | return usb_reset_composite_device(ps->dev, NULL); |
1da177e4 LT |
842 | } |
843 | ||
844 | static int proc_setintf(struct dev_state *ps, void __user *arg) | |
845 | { | |
846 | struct usbdevfs_setinterface setintf; | |
847 | int ret; | |
848 | ||
849 | if (copy_from_user(&setintf, arg, sizeof(setintf))) | |
850 | return -EFAULT; | |
851 | if ((ret = checkintf(ps, setintf.interface))) | |
852 | return ret; | |
853 | return usb_set_interface(ps->dev, setintf.interface, | |
854 | setintf.altsetting); | |
855 | } | |
856 | ||
857 | static int proc_setconfig(struct dev_state *ps, void __user *arg) | |
858 | { | |
859 | unsigned int u; | |
860 | int status = 0; | |
861 | struct usb_host_config *actconfig; | |
862 | ||
863 | if (get_user(u, (unsigned int __user *)arg)) | |
864 | return -EFAULT; | |
865 | ||
866 | actconfig = ps->dev->actconfig; | |
867 | ||
868 | /* Don't touch the device if any interfaces are claimed. | |
869 | * It could interfere with other drivers' operations, and if | |
870 | * an interface is claimed by usbfs it could easily deadlock. | |
871 | */ | |
872 | if (actconfig) { | |
873 | int i; | |
874 | ||
875 | for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) { | |
876 | if (usb_interface_claimed(actconfig->interface[i])) { | |
877 | dev_warn (&ps->dev->dev, | |
72ebddb5 | 878 | "usbfs: interface %d claimed by %s " |
1da177e4 LT |
879 | "while '%s' sets config #%d\n", |
880 | actconfig->interface[i] | |
881 | ->cur_altsetting | |
882 | ->desc.bInterfaceNumber, | |
72ebddb5 DB |
883 | actconfig->interface[i] |
884 | ->dev.driver->name, | |
1da177e4 | 885 | current->comm, u); |
1da177e4 LT |
886 | status = -EBUSY; |
887 | break; | |
1da177e4 LT |
888 | } |
889 | } | |
890 | } | |
891 | ||
892 | /* SET_CONFIGURATION is often abused as a "cheap" driver reset, | |
893 | * so avoid usb_set_configuration()'s kick to sysfs | |
894 | */ | |
895 | if (status == 0) { | |
896 | if (actconfig && actconfig->desc.bConfigurationValue == u) | |
897 | status = usb_reset_configuration(ps->dev); | |
898 | else | |
899 | status = usb_set_configuration(ps->dev, u); | |
900 | } | |
901 | ||
902 | return status; | |
903 | } | |
904 | ||
1da177e4 LT |
905 | static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb, |
906 | struct usbdevfs_iso_packet_desc __user *iso_frame_desc, | |
907 | void __user *arg) | |
908 | { | |
909 | struct usbdevfs_iso_packet_desc *isopkt = NULL; | |
910 | struct usb_host_endpoint *ep; | |
911 | struct async *as; | |
912 | struct usb_ctrlrequest *dr = NULL; | |
913 | unsigned int u, totlen, isofrmlen; | |
914 | int ret, interval = 0, ifnum = -1; | |
915 | ||
916 | if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP|USBDEVFS_URB_SHORT_NOT_OK| | |
917 | URB_NO_FSBR|URB_ZERO_PACKET)) | |
918 | return -EINVAL; | |
919 | if (!uurb->buffer) | |
920 | return -EINVAL; | |
921 | if (uurb->signr != 0 && (uurb->signr < SIGRTMIN || uurb->signr > SIGRTMAX)) | |
922 | return -EINVAL; | |
923 | if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL && (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) { | |
924 | if ((ifnum = findintfep(ps->dev, uurb->endpoint)) < 0) | |
925 | return ifnum; | |
926 | if ((ret = checkintf(ps, ifnum))) | |
927 | return ret; | |
928 | } | |
929 | if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0) | |
930 | ep = ps->dev->ep_in [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK]; | |
931 | else | |
932 | ep = ps->dev->ep_out [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK]; | |
933 | if (!ep) | |
934 | return -ENOENT; | |
935 | switch(uurb->type) { | |
936 | case USBDEVFS_URB_TYPE_CONTROL: | |
937 | if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) | |
938 | != USB_ENDPOINT_XFER_CONTROL) | |
939 | return -EINVAL; | |
e016683d MD |
940 | /* min 8 byte setup packet, max 8 byte setup plus an arbitrary data stage */ |
941 | if (uurb->buffer_length < 8 || uurb->buffer_length > (8 + MAX_USBFS_BUFFER_SIZE)) | |
1da177e4 LT |
942 | return -EINVAL; |
943 | if (!(dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL))) | |
944 | return -ENOMEM; | |
945 | if (copy_from_user(dr, uurb->buffer, 8)) { | |
946 | kfree(dr); | |
947 | return -EFAULT; | |
948 | } | |
949 | if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) { | |
950 | kfree(dr); | |
951 | return -EINVAL; | |
952 | } | |
953 | if ((ret = check_ctrlrecip(ps, dr->bRequestType, le16_to_cpup(&dr->wIndex)))) { | |
954 | kfree(dr); | |
955 | return ret; | |
956 | } | |
957 | uurb->endpoint = (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) | (dr->bRequestType & USB_ENDPOINT_DIR_MASK); | |
958 | uurb->number_of_packets = 0; | |
959 | uurb->buffer_length = le16_to_cpup(&dr->wLength); | |
960 | uurb->buffer += 8; | |
961 | if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) { | |
962 | kfree(dr); | |
963 | return -EFAULT; | |
964 | } | |
e639dd3f | 965 | snoop(&ps->dev->dev, "control urb\n"); |
1da177e4 LT |
966 | break; |
967 | ||
968 | case USBDEVFS_URB_TYPE_BULK: | |
969 | switch (ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) { | |
970 | case USB_ENDPOINT_XFER_CONTROL: | |
971 | case USB_ENDPOINT_XFER_ISOC: | |
972 | return -EINVAL; | |
973 | /* allow single-shot interrupt transfers, at bogus rates */ | |
974 | } | |
975 | uurb->number_of_packets = 0; | |
976 | if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE) | |
977 | return -EINVAL; | |
978 | if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) | |
979 | return -EFAULT; | |
e639dd3f | 980 | snoop(&ps->dev->dev, "bulk urb\n"); |
1da177e4 LT |
981 | break; |
982 | ||
983 | case USBDEVFS_URB_TYPE_ISO: | |
984 | /* arbitrary limit */ | |
985 | if (uurb->number_of_packets < 1 || uurb->number_of_packets > 128) | |
986 | return -EINVAL; | |
987 | if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) | |
988 | != USB_ENDPOINT_XFER_ISOC) | |
989 | return -EINVAL; | |
990 | interval = 1 << min (15, ep->desc.bInterval - 1); | |
991 | isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * uurb->number_of_packets; | |
992 | if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL))) | |
993 | return -ENOMEM; | |
994 | if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) { | |
995 | kfree(isopkt); | |
996 | return -EFAULT; | |
997 | } | |
998 | for (totlen = u = 0; u < uurb->number_of_packets; u++) { | |
3612242e MD |
999 | /* arbitrary limit, sufficient for USB 2.0 high-bandwidth iso */ |
1000 | if (isopkt[u].length > 8192) { | |
1da177e4 LT |
1001 | kfree(isopkt); |
1002 | return -EINVAL; | |
1003 | } | |
1004 | totlen += isopkt[u].length; | |
1005 | } | |
1006 | if (totlen > 32768) { | |
1007 | kfree(isopkt); | |
1008 | return -EINVAL; | |
1009 | } | |
1010 | uurb->buffer_length = totlen; | |
e639dd3f | 1011 | snoop(&ps->dev->dev, "iso urb\n"); |
1da177e4 LT |
1012 | break; |
1013 | ||
1014 | case USBDEVFS_URB_TYPE_INTERRUPT: | |
1015 | uurb->number_of_packets = 0; | |
1016 | if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) | |
1017 | != USB_ENDPOINT_XFER_INT) | |
1018 | return -EINVAL; | |
1019 | if (ps->dev->speed == USB_SPEED_HIGH) | |
1020 | interval = 1 << min (15, ep->desc.bInterval - 1); | |
1021 | else | |
1022 | interval = ep->desc.bInterval; | |
1023 | if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE) | |
1024 | return -EINVAL; | |
1025 | if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) | |
1026 | return -EFAULT; | |
e639dd3f | 1027 | snoop(&ps->dev->dev, "interrupt urb\n"); |
1da177e4 LT |
1028 | break; |
1029 | ||
1030 | default: | |
1031 | return -EINVAL; | |
1032 | } | |
1033 | if (!(as = alloc_async(uurb->number_of_packets))) { | |
6fd19f4b JJ |
1034 | kfree(isopkt); |
1035 | kfree(dr); | |
1da177e4 LT |
1036 | return -ENOMEM; |
1037 | } | |
1038 | if (!(as->urb->transfer_buffer = kmalloc(uurb->buffer_length, GFP_KERNEL))) { | |
6fd19f4b JJ |
1039 | kfree(isopkt); |
1040 | kfree(dr); | |
1da177e4 LT |
1041 | free_async(as); |
1042 | return -ENOMEM; | |
1043 | } | |
1044 | as->urb->dev = ps->dev; | |
1045 | as->urb->pipe = (uurb->type << 30) | __create_pipe(ps->dev, uurb->endpoint & 0xf) | (uurb->endpoint & USB_DIR_IN); | |
1046 | as->urb->transfer_flags = uurb->flags; | |
1047 | as->urb->transfer_buffer_length = uurb->buffer_length; | |
1048 | as->urb->setup_packet = (unsigned char*)dr; | |
1049 | as->urb->start_frame = uurb->start_frame; | |
1050 | as->urb->number_of_packets = uurb->number_of_packets; | |
1051 | as->urb->interval = interval; | |
1052 | as->urb->context = as; | |
1053 | as->urb->complete = async_completed; | |
1054 | for (totlen = u = 0; u < uurb->number_of_packets; u++) { | |
1055 | as->urb->iso_frame_desc[u].offset = totlen; | |
1056 | as->urb->iso_frame_desc[u].length = isopkt[u].length; | |
1057 | totlen += isopkt[u].length; | |
1058 | } | |
6fd19f4b | 1059 | kfree(isopkt); |
1da177e4 LT |
1060 | as->ps = ps; |
1061 | as->userurb = arg; | |
1062 | if (uurb->endpoint & USB_DIR_IN) | |
1063 | as->userbuffer = uurb->buffer; | |
1064 | else | |
1065 | as->userbuffer = NULL; | |
1066 | as->signr = uurb->signr; | |
1067 | as->ifnum = ifnum; | |
2425c08b | 1068 | as->pid = get_pid(task_pid(current)); |
46113830 HW |
1069 | as->uid = current->uid; |
1070 | as->euid = current->euid; | |
7a01955f | 1071 | security_task_getsecid(current, &as->secid); |
1da177e4 LT |
1072 | if (!(uurb->endpoint & USB_DIR_IN)) { |
1073 | if (copy_from_user(as->urb->transfer_buffer, uurb->buffer, as->urb->transfer_buffer_length)) { | |
1074 | free_async(as); | |
1075 | return -EFAULT; | |
1076 | } | |
1077 | } | |
e639dd3f GKH |
1078 | snoop(&as->urb->dev->dev, "submit urb\n"); |
1079 | snoop_urb(as->urb, as->userurb); | |
1da177e4 LT |
1080 | async_newpending(as); |
1081 | if ((ret = usb_submit_urb(as->urb, GFP_KERNEL))) { | |
1082 | dev_printk(KERN_DEBUG, &ps->dev->dev, "usbfs: usb_submit_urb returned %d\n", ret); | |
1083 | async_removepending(as); | |
1084 | free_async(as); | |
1085 | return ret; | |
1086 | } | |
1087 | return 0; | |
1088 | } | |
1089 | ||
1090 | static int proc_submiturb(struct dev_state *ps, void __user *arg) | |
1091 | { | |
1092 | struct usbdevfs_urb uurb; | |
1093 | ||
1094 | if (copy_from_user(&uurb, arg, sizeof(uurb))) | |
1095 | return -EFAULT; | |
1096 | ||
83626b01 | 1097 | return proc_do_submiturb(ps, &uurb, (((struct usbdevfs_urb __user *)arg)->iso_frame_desc), arg); |
1da177e4 LT |
1098 | } |
1099 | ||
1100 | static int proc_unlinkurb(struct dev_state *ps, void __user *arg) | |
1101 | { | |
1102 | struct async *as; | |
1103 | ||
1104 | as = async_getpending(ps, arg); | |
1105 | if (!as) | |
1106 | return -EINVAL; | |
1107 | usb_kill_urb(as->urb); | |
1108 | return 0; | |
1109 | } | |
1110 | ||
1111 | static int processcompl(struct async *as, void __user * __user *arg) | |
1112 | { | |
1113 | struct urb *urb = as->urb; | |
1114 | struct usbdevfs_urb __user *userurb = as->userurb; | |
1115 | void __user *addr = as->userurb; | |
1116 | unsigned int i; | |
1117 | ||
1118 | if (as->userbuffer) | |
1119 | if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length)) | |
1120 | return -EFAULT; | |
1121 | if (put_user(urb->status, &userurb->status)) | |
1122 | return -EFAULT; | |
1123 | if (put_user(urb->actual_length, &userurb->actual_length)) | |
1124 | return -EFAULT; | |
1125 | if (put_user(urb->error_count, &userurb->error_count)) | |
1126 | return -EFAULT; | |
1127 | ||
668a9541 CL |
1128 | if (usb_pipeisoc(urb->pipe)) { |
1129 | for (i = 0; i < urb->number_of_packets; i++) { | |
1130 | if (put_user(urb->iso_frame_desc[i].actual_length, | |
1131 | &userurb->iso_frame_desc[i].actual_length)) | |
1132 | return -EFAULT; | |
1133 | if (put_user(urb->iso_frame_desc[i].status, | |
1134 | &userurb->iso_frame_desc[i].status)) | |
1135 | return -EFAULT; | |
1136 | } | |
1da177e4 LT |
1137 | } |
1138 | ||
1139 | free_async(as); | |
1140 | ||
1141 | if (put_user(addr, (void __user * __user *)arg)) | |
1142 | return -EFAULT; | |
1143 | return 0; | |
1144 | } | |
1145 | ||
1146 | static struct async* reap_as(struct dev_state *ps) | |
1147 | { | |
1148 | DECLARE_WAITQUEUE(wait, current); | |
1149 | struct async *as = NULL; | |
1150 | struct usb_device *dev = ps->dev; | |
1151 | ||
1152 | add_wait_queue(&ps->wait, &wait); | |
1153 | for (;;) { | |
1154 | __set_current_state(TASK_INTERRUPTIBLE); | |
1155 | if ((as = async_getcompleted(ps))) | |
1156 | break; | |
1157 | if (signal_pending(current)) | |
1158 | break; | |
1159 | usb_unlock_device(dev); | |
1160 | schedule(); | |
1161 | usb_lock_device(dev); | |
1162 | } | |
1163 | remove_wait_queue(&ps->wait, &wait); | |
1164 | set_current_state(TASK_RUNNING); | |
1165 | return as; | |
1166 | } | |
1167 | ||
1168 | static int proc_reapurb(struct dev_state *ps, void __user *arg) | |
1169 | { | |
1170 | struct async *as = reap_as(ps); | |
1171 | if (as) | |
1172 | return processcompl(as, (void __user * __user *)arg); | |
1173 | if (signal_pending(current)) | |
1174 | return -EINTR; | |
1175 | return -EIO; | |
1176 | } | |
1177 | ||
1178 | static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg) | |
1179 | { | |
1180 | struct async *as; | |
1181 | ||
1182 | if (!(as = async_getcompleted(ps))) | |
1183 | return -EAGAIN; | |
1184 | return processcompl(as, (void __user * __user *)arg); | |
1185 | } | |
1186 | ||
1187 | #ifdef CONFIG_COMPAT | |
1188 | ||
1189 | static int get_urb32(struct usbdevfs_urb *kurb, | |
1190 | struct usbdevfs_urb32 __user *uurb) | |
1191 | { | |
1192 | __u32 uptr; | |
1193 | if (get_user(kurb->type, &uurb->type) || | |
1194 | __get_user(kurb->endpoint, &uurb->endpoint) || | |
1195 | __get_user(kurb->status, &uurb->status) || | |
1196 | __get_user(kurb->flags, &uurb->flags) || | |
1197 | __get_user(kurb->buffer_length, &uurb->buffer_length) || | |
1198 | __get_user(kurb->actual_length, &uurb->actual_length) || | |
1199 | __get_user(kurb->start_frame, &uurb->start_frame) || | |
1200 | __get_user(kurb->number_of_packets, &uurb->number_of_packets) || | |
1201 | __get_user(kurb->error_count, &uurb->error_count) || | |
1202 | __get_user(kurb->signr, &uurb->signr)) | |
1203 | return -EFAULT; | |
1204 | ||
1205 | if (__get_user(uptr, &uurb->buffer)) | |
1206 | return -EFAULT; | |
1207 | kurb->buffer = compat_ptr(uptr); | |
1208 | if (__get_user(uptr, &uurb->buffer)) | |
1209 | return -EFAULT; | |
1210 | kurb->usercontext = compat_ptr(uptr); | |
1211 | ||
1212 | return 0; | |
1213 | } | |
1214 | ||
1215 | static int proc_submiturb_compat(struct dev_state *ps, void __user *arg) | |
1216 | { | |
1217 | struct usbdevfs_urb uurb; | |
1218 | ||
1219 | if (get_urb32(&uurb,(struct usbdevfs_urb32 *)arg)) | |
1220 | return -EFAULT; | |
1221 | ||
83626b01 | 1222 | return proc_do_submiturb(ps, &uurb, ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc, arg); |
1da177e4 LT |
1223 | } |
1224 | ||
1225 | static int processcompl_compat(struct async *as, void __user * __user *arg) | |
1226 | { | |
1227 | struct urb *urb = as->urb; | |
1228 | struct usbdevfs_urb32 __user *userurb = as->userurb; | |
1229 | void __user *addr = as->userurb; | |
1230 | unsigned int i; | |
1231 | ||
1232 | if (as->userbuffer) | |
1233 | if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length)) | |
1234 | return -EFAULT; | |
1235 | if (put_user(urb->status, &userurb->status)) | |
1236 | return -EFAULT; | |
1237 | if (put_user(urb->actual_length, &userurb->actual_length)) | |
1238 | return -EFAULT; | |
1239 | if (put_user(urb->error_count, &userurb->error_count)) | |
1240 | return -EFAULT; | |
1241 | ||
668a9541 CL |
1242 | if (usb_pipeisoc(urb->pipe)) { |
1243 | for (i = 0; i < urb->number_of_packets; i++) { | |
1244 | if (put_user(urb->iso_frame_desc[i].actual_length, | |
1245 | &userurb->iso_frame_desc[i].actual_length)) | |
1246 | return -EFAULT; | |
1247 | if (put_user(urb->iso_frame_desc[i].status, | |
1248 | &userurb->iso_frame_desc[i].status)) | |
1249 | return -EFAULT; | |
1250 | } | |
1da177e4 LT |
1251 | } |
1252 | ||
1253 | free_async(as); | |
1254 | if (put_user((u32)(u64)addr, (u32 __user *)arg)) | |
1255 | return -EFAULT; | |
1256 | return 0; | |
1257 | } | |
1258 | ||
1259 | static int proc_reapurb_compat(struct dev_state *ps, void __user *arg) | |
1260 | { | |
1261 | struct async *as = reap_as(ps); | |
1262 | if (as) | |
1263 | return processcompl_compat(as, (void __user * __user *)arg); | |
1264 | if (signal_pending(current)) | |
1265 | return -EINTR; | |
1266 | return -EIO; | |
1267 | } | |
1268 | ||
1269 | static int proc_reapurbnonblock_compat(struct dev_state *ps, void __user *arg) | |
1270 | { | |
1271 | struct async *as; | |
1272 | ||
1da177e4 LT |
1273 | if (!(as = async_getcompleted(ps))) |
1274 | return -EAGAIN; | |
1da177e4 LT |
1275 | return processcompl_compat(as, (void __user * __user *)arg); |
1276 | } | |
1277 | ||
1278 | #endif | |
1279 | ||
1280 | static int proc_disconnectsignal(struct dev_state *ps, void __user *arg) | |
1281 | { | |
1282 | struct usbdevfs_disconnectsignal ds; | |
1283 | ||
1284 | if (copy_from_user(&ds, arg, sizeof(ds))) | |
1285 | return -EFAULT; | |
1286 | if (ds.signr != 0 && (ds.signr < SIGRTMIN || ds.signr > SIGRTMAX)) | |
1287 | return -EINVAL; | |
1288 | ps->discsignr = ds.signr; | |
1289 | ps->disccontext = ds.context; | |
1290 | return 0; | |
1291 | } | |
1292 | ||
1293 | static int proc_claiminterface(struct dev_state *ps, void __user *arg) | |
1294 | { | |
1295 | unsigned int ifnum; | |
1296 | ||
1297 | if (get_user(ifnum, (unsigned int __user *)arg)) | |
1298 | return -EFAULT; | |
1299 | return claimintf(ps, ifnum); | |
1300 | } | |
1301 | ||
1302 | static int proc_releaseinterface(struct dev_state *ps, void __user *arg) | |
1303 | { | |
1304 | unsigned int ifnum; | |
1305 | int ret; | |
1306 | ||
1307 | if (get_user(ifnum, (unsigned int __user *)arg)) | |
1308 | return -EFAULT; | |
1309 | if ((ret = releaseintf(ps, ifnum)) < 0) | |
1310 | return ret; | |
1311 | destroy_async_on_interface (ps, ifnum); | |
1312 | return 0; | |
1313 | } | |
1314 | ||
c36fc889 | 1315 | static int proc_ioctl(struct dev_state *ps, struct usbdevfs_ioctl *ctl) |
1da177e4 | 1316 | { |
1da177e4 LT |
1317 | int size; |
1318 | void *buf = NULL; | |
1319 | int retval = 0; | |
1320 | struct usb_interface *intf = NULL; | |
1321 | struct usb_driver *driver = NULL; | |
1da177e4 | 1322 | |
c36fc889 PZ |
1323 | /* alloc buffer */ |
1324 | if ((size = _IOC_SIZE (ctl->ioctl_code)) > 0) { | |
1da177e4 LT |
1325 | if ((buf = kmalloc (size, GFP_KERNEL)) == NULL) |
1326 | return -ENOMEM; | |
c36fc889 PZ |
1327 | if ((_IOC_DIR(ctl->ioctl_code) & _IOC_WRITE)) { |
1328 | if (copy_from_user (buf, ctl->data, size)) { | |
6fd19f4b | 1329 | kfree(buf); |
1da177e4 LT |
1330 | return -EFAULT; |
1331 | } | |
1332 | } else { | |
1333 | memset (buf, 0, size); | |
1334 | } | |
1335 | } | |
1336 | ||
349710c3 | 1337 | if (!connected(ps)) { |
6fd19f4b | 1338 | kfree(buf); |
1da177e4 LT |
1339 | return -ENODEV; |
1340 | } | |
1341 | ||
1342 | if (ps->dev->state != USB_STATE_CONFIGURED) | |
1343 | retval = -EHOSTUNREACH; | |
c36fc889 | 1344 | else if (!(intf = usb_ifnum_to_if (ps->dev, ctl->ifno))) |
1da177e4 | 1345 | retval = -EINVAL; |
c36fc889 | 1346 | else switch (ctl->ioctl_code) { |
1da177e4 LT |
1347 | |
1348 | /* disconnect kernel driver from interface */ | |
1349 | case USBDEVFS_DISCONNECT: | |
1350 | ||
1da177e4 LT |
1351 | down_write(&usb_bus_type.subsys.rwsem); |
1352 | if (intf->dev.driver) { | |
1353 | driver = to_usb_driver(intf->dev.driver); | |
1354 | dev_dbg (&intf->dev, "disconnect by usbfs\n"); | |
1355 | usb_driver_release_interface(driver, intf); | |
1356 | } else | |
1357 | retval = -ENODATA; | |
1358 | up_write(&usb_bus_type.subsys.rwsem); | |
1359 | break; | |
1360 | ||
1361 | /* let kernel drivers try to (re)bind to the interface */ | |
1362 | case USBDEVFS_CONNECT: | |
1363 | usb_unlock_device(ps->dev); | |
1b21d5e1 | 1364 | retval = bus_rescan_devices(intf->dev.bus); |
1da177e4 LT |
1365 | usb_lock_device(ps->dev); |
1366 | break; | |
1367 | ||
1368 | /* talk directly to the interface's driver */ | |
1369 | default: | |
1370 | down_read(&usb_bus_type.subsys.rwsem); | |
1371 | if (intf->dev.driver) | |
1372 | driver = to_usb_driver(intf->dev.driver); | |
1373 | if (driver == NULL || driver->ioctl == NULL) { | |
1374 | retval = -ENOTTY; | |
1375 | } else { | |
c36fc889 | 1376 | retval = driver->ioctl (intf, ctl->ioctl_code, buf); |
1da177e4 LT |
1377 | if (retval == -ENOIOCTLCMD) |
1378 | retval = -ENOTTY; | |
1379 | } | |
1380 | up_read(&usb_bus_type.subsys.rwsem); | |
1381 | } | |
1382 | ||
1383 | /* cleanup and return */ | |
1384 | if (retval >= 0 | |
c36fc889 | 1385 | && (_IOC_DIR (ctl->ioctl_code) & _IOC_READ) != 0 |
1da177e4 | 1386 | && size > 0 |
c36fc889 | 1387 | && copy_to_user (ctl->data, buf, size) != 0) |
1da177e4 | 1388 | retval = -EFAULT; |
6fd19f4b JJ |
1389 | |
1390 | kfree(buf); | |
1da177e4 LT |
1391 | return retval; |
1392 | } | |
1393 | ||
c36fc889 PZ |
1394 | static int proc_ioctl_default(struct dev_state *ps, void __user *arg) |
1395 | { | |
1396 | struct usbdevfs_ioctl ctrl; | |
1397 | ||
1398 | if (copy_from_user(&ctrl, arg, sizeof (ctrl))) | |
1399 | return -EFAULT; | |
1400 | return proc_ioctl(ps, &ctrl); | |
1401 | } | |
1402 | ||
1403 | #ifdef CONFIG_COMPAT | |
777da590 | 1404 | static int proc_ioctl_compat(struct dev_state *ps, compat_uptr_t arg) |
c36fc889 PZ |
1405 | { |
1406 | struct usbdevfs_ioctl32 __user *uioc; | |
1407 | struct usbdevfs_ioctl ctrl; | |
1408 | u32 udata; | |
1409 | ||
058120d7 | 1410 | uioc = compat_ptr((long)arg); |
c36fc889 PZ |
1411 | if (get_user(ctrl.ifno, &uioc->ifno) || |
1412 | get_user(ctrl.ioctl_code, &uioc->ioctl_code) || | |
1413 | __get_user(udata, &uioc->data)) | |
1414 | return -EFAULT; | |
1415 | ctrl.data = compat_ptr(udata); | |
1416 | ||
1417 | return proc_ioctl(ps, &ctrl); | |
1418 | } | |
1419 | #endif | |
1420 | ||
1da177e4 LT |
1421 | /* |
1422 | * NOTE: All requests here that have interface numbers as parameters | |
1423 | * are assuming that somehow the configuration has been prevented from | |
1424 | * changing. But there's no mechanism to ensure that... | |
1425 | */ | |
1426 | static int usbdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) | |
1427 | { | |
ec17cf1c | 1428 | struct dev_state *ps = file->private_data; |
1da177e4 LT |
1429 | struct usb_device *dev = ps->dev; |
1430 | void __user *p = (void __user *)arg; | |
1431 | int ret = -ENOTTY; | |
1432 | ||
1433 | if (!(file->f_mode & FMODE_WRITE)) | |
1434 | return -EPERM; | |
1435 | usb_lock_device(dev); | |
349710c3 | 1436 | if (!connected(ps)) { |
1da177e4 LT |
1437 | usb_unlock_device(dev); |
1438 | return -ENODEV; | |
1439 | } | |
1440 | ||
1441 | switch (cmd) { | |
1442 | case USBDEVFS_CONTROL: | |
1443 | snoop(&dev->dev, "%s: CONTROL\n", __FUNCTION__); | |
1444 | ret = proc_control(ps, p); | |
1445 | if (ret >= 0) | |
1446 | inode->i_mtime = CURRENT_TIME; | |
1447 | break; | |
1448 | ||
1449 | case USBDEVFS_BULK: | |
1450 | snoop(&dev->dev, "%s: BULK\n", __FUNCTION__); | |
1451 | ret = proc_bulk(ps, p); | |
1452 | if (ret >= 0) | |
1453 | inode->i_mtime = CURRENT_TIME; | |
1454 | break; | |
1455 | ||
1456 | case USBDEVFS_RESETEP: | |
1457 | snoop(&dev->dev, "%s: RESETEP\n", __FUNCTION__); | |
1458 | ret = proc_resetep(ps, p); | |
1459 | if (ret >= 0) | |
1460 | inode->i_mtime = CURRENT_TIME; | |
1461 | break; | |
1462 | ||
1463 | case USBDEVFS_RESET: | |
1464 | snoop(&dev->dev, "%s: RESET\n", __FUNCTION__); | |
1465 | ret = proc_resetdevice(ps); | |
1466 | break; | |
1467 | ||
1468 | case USBDEVFS_CLEAR_HALT: | |
1469 | snoop(&dev->dev, "%s: CLEAR_HALT\n", __FUNCTION__); | |
1470 | ret = proc_clearhalt(ps, p); | |
1471 | if (ret >= 0) | |
1472 | inode->i_mtime = CURRENT_TIME; | |
1473 | break; | |
1474 | ||
1475 | case USBDEVFS_GETDRIVER: | |
1476 | snoop(&dev->dev, "%s: GETDRIVER\n", __FUNCTION__); | |
1477 | ret = proc_getdriver(ps, p); | |
1478 | break; | |
1479 | ||
1480 | case USBDEVFS_CONNECTINFO: | |
1481 | snoop(&dev->dev, "%s: CONNECTINFO\n", __FUNCTION__); | |
1482 | ret = proc_connectinfo(ps, p); | |
1483 | break; | |
1484 | ||
1485 | case USBDEVFS_SETINTERFACE: | |
1486 | snoop(&dev->dev, "%s: SETINTERFACE\n", __FUNCTION__); | |
1487 | ret = proc_setintf(ps, p); | |
1488 | break; | |
1489 | ||
1490 | case USBDEVFS_SETCONFIGURATION: | |
1491 | snoop(&dev->dev, "%s: SETCONFIGURATION\n", __FUNCTION__); | |
1492 | ret = proc_setconfig(ps, p); | |
1493 | break; | |
1494 | ||
1495 | case USBDEVFS_SUBMITURB: | |
1496 | snoop(&dev->dev, "%s: SUBMITURB\n", __FUNCTION__); | |
1497 | ret = proc_submiturb(ps, p); | |
1498 | if (ret >= 0) | |
1499 | inode->i_mtime = CURRENT_TIME; | |
1500 | break; | |
1501 | ||
1502 | #ifdef CONFIG_COMPAT | |
1503 | ||
1504 | case USBDEVFS_SUBMITURB32: | |
1505 | snoop(&dev->dev, "%s: SUBMITURB32\n", __FUNCTION__); | |
1506 | ret = proc_submiturb_compat(ps, p); | |
1507 | if (ret >= 0) | |
1508 | inode->i_mtime = CURRENT_TIME; | |
1509 | break; | |
1510 | ||
1511 | case USBDEVFS_REAPURB32: | |
1512 | snoop(&dev->dev, "%s: REAPURB32\n", __FUNCTION__); | |
1513 | ret = proc_reapurb_compat(ps, p); | |
1514 | break; | |
1515 | ||
1516 | case USBDEVFS_REAPURBNDELAY32: | |
1517 | snoop(&dev->dev, "%s: REAPURBDELAY32\n", __FUNCTION__); | |
1518 | ret = proc_reapurbnonblock_compat(ps, p); | |
1519 | break; | |
1520 | ||
c36fc889 PZ |
1521 | case USBDEVFS_IOCTL32: |
1522 | snoop(&dev->dev, "%s: IOCTL\n", __FUNCTION__); | |
777da590 | 1523 | ret = proc_ioctl_compat(ps, (compat_uptr_t)(long)p); |
c36fc889 | 1524 | break; |
1da177e4 LT |
1525 | #endif |
1526 | ||
1527 | case USBDEVFS_DISCARDURB: | |
1528 | snoop(&dev->dev, "%s: DISCARDURB\n", __FUNCTION__); | |
1529 | ret = proc_unlinkurb(ps, p); | |
1530 | break; | |
1531 | ||
1532 | case USBDEVFS_REAPURB: | |
1533 | snoop(&dev->dev, "%s: REAPURB\n", __FUNCTION__); | |
1534 | ret = proc_reapurb(ps, p); | |
1535 | break; | |
1536 | ||
1537 | case USBDEVFS_REAPURBNDELAY: | |
1538 | snoop(&dev->dev, "%s: REAPURBDELAY\n", __FUNCTION__); | |
1539 | ret = proc_reapurbnonblock(ps, p); | |
1540 | break; | |
1541 | ||
1542 | case USBDEVFS_DISCSIGNAL: | |
1543 | snoop(&dev->dev, "%s: DISCSIGNAL\n", __FUNCTION__); | |
1544 | ret = proc_disconnectsignal(ps, p); | |
1545 | break; | |
1546 | ||
1547 | case USBDEVFS_CLAIMINTERFACE: | |
1548 | snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __FUNCTION__); | |
1549 | ret = proc_claiminterface(ps, p); | |
1550 | break; | |
1551 | ||
1552 | case USBDEVFS_RELEASEINTERFACE: | |
1553 | snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __FUNCTION__); | |
1554 | ret = proc_releaseinterface(ps, p); | |
1555 | break; | |
1556 | ||
1557 | case USBDEVFS_IOCTL: | |
1558 | snoop(&dev->dev, "%s: IOCTL\n", __FUNCTION__); | |
c36fc889 | 1559 | ret = proc_ioctl_default(ps, p); |
1da177e4 LT |
1560 | break; |
1561 | } | |
1562 | usb_unlock_device(dev); | |
1563 | if (ret >= 0) | |
1564 | inode->i_atime = CURRENT_TIME; | |
1565 | return ret; | |
1566 | } | |
1567 | ||
1568 | /* No kernel lock - fine */ | |
1569 | static unsigned int usbdev_poll(struct file *file, struct poll_table_struct *wait) | |
1570 | { | |
ec17cf1c TK |
1571 | struct dev_state *ps = file->private_data; |
1572 | unsigned int mask = 0; | |
1da177e4 LT |
1573 | |
1574 | poll_wait(file, &ps->wait, wait); | |
1575 | if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed)) | |
1576 | mask |= POLLOUT | POLLWRNORM; | |
349710c3 | 1577 | if (!connected(ps)) |
1da177e4 LT |
1578 | mask |= POLLERR | POLLHUP; |
1579 | return mask; | |
1580 | } | |
1581 | ||
066202dd | 1582 | const struct file_operations usbfs_device_file_operations = { |
1da177e4 LT |
1583 | .llseek = usbdev_lseek, |
1584 | .read = usbdev_read, | |
1585 | .poll = usbdev_poll, | |
1586 | .ioctl = usbdev_ioctl, | |
1587 | .open = usbdev_open, | |
1588 | .release = usbdev_release, | |
1589 | }; | |
fbf82fd2 | 1590 | |
a7b986b3 | 1591 | static void usbdev_add(struct usb_device *dev) |
fbf82fd2 KS |
1592 | { |
1593 | int minor = ((dev->bus->busnum-1) * 128) + (dev->devnum-1); | |
1594 | ||
cae74b30 GKH |
1595 | dev->class_dev = class_device_create(usb_device_class, NULL, |
1596 | MKDEV(USB_DEVICE_MAJOR, minor), &dev->dev, | |
fbf82fd2 KS |
1597 | "usbdev%d.%d", dev->bus->busnum, dev->devnum); |
1598 | ||
cae74b30 | 1599 | dev->class_dev->class_data = dev; |
fbf82fd2 KS |
1600 | } |
1601 | ||
a7b986b3 | 1602 | static void usbdev_remove(struct usb_device *dev) |
fbf82fd2 | 1603 | { |
cae74b30 | 1604 | class_device_unregister(dev->class_dev); |
fbf82fd2 KS |
1605 | } |
1606 | ||
a7b986b3 GKH |
1607 | static int usbdev_notify(struct notifier_block *self, unsigned long action, |
1608 | void *dev) | |
1609 | { | |
1610 | switch (action) { | |
1611 | case USB_DEVICE_ADD: | |
1612 | usbdev_add(dev); | |
1613 | break; | |
1614 | case USB_DEVICE_REMOVE: | |
1615 | usbdev_remove(dev); | |
1616 | break; | |
1617 | } | |
1618 | return NOTIFY_OK; | |
1619 | } | |
1620 | ||
1621 | static struct notifier_block usbdev_nb = { | |
1622 | .notifier_call = usbdev_notify, | |
1623 | }; | |
1624 | ||
fbf82fd2 KS |
1625 | static struct cdev usb_device_cdev = { |
1626 | .kobj = {.name = "usb_device", }, | |
1627 | .owner = THIS_MODULE, | |
1628 | }; | |
1629 | ||
1630 | int __init usbdev_init(void) | |
1631 | { | |
1632 | int retval; | |
1633 | ||
fad21bdf AS |
1634 | retval = register_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX, |
1635 | "usb_device"); | |
fbf82fd2 KS |
1636 | if (retval) { |
1637 | err("unable to register minors for usb_device"); | |
1638 | goto out; | |
1639 | } | |
1640 | cdev_init(&usb_device_cdev, &usbfs_device_file_operations); | |
fad21bdf | 1641 | retval = cdev_add(&usb_device_cdev, USB_DEVICE_DEV, USB_DEVICE_MAX); |
fbf82fd2 KS |
1642 | if (retval) { |
1643 | err("unable to get usb_device major %d", USB_DEVICE_MAJOR); | |
a7b986b3 | 1644 | goto error_cdev; |
fbf82fd2 KS |
1645 | } |
1646 | usb_device_class = class_create(THIS_MODULE, "usb_device"); | |
1647 | if (IS_ERR(usb_device_class)) { | |
1648 | err("unable to register usb_device class"); | |
1649 | retval = PTR_ERR(usb_device_class); | |
a7b986b3 | 1650 | goto error_class; |
fbf82fd2 KS |
1651 | } |
1652 | ||
a7b986b3 GKH |
1653 | usb_register_notify(&usbdev_nb); |
1654 | ||
fbf82fd2 KS |
1655 | out: |
1656 | return retval; | |
a7b986b3 GKH |
1657 | |
1658 | error_class: | |
1659 | usb_device_class = NULL; | |
1660 | cdev_del(&usb_device_cdev); | |
1661 | ||
1662 | error_cdev: | |
1663 | unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX); | |
1664 | goto out; | |
fbf82fd2 KS |
1665 | } |
1666 | ||
1667 | void usbdev_cleanup(void) | |
1668 | { | |
a7b986b3 | 1669 | usb_unregister_notify(&usbdev_nb); |
fbf82fd2 KS |
1670 | class_destroy(usb_device_class); |
1671 | cdev_del(&usb_device_cdev); | |
fad21bdf | 1672 | unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX); |
fbf82fd2 KS |
1673 | } |
1674 |