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 | * | |
1da177e4 LT |
22 | * This file implements the usbfs/x/y files, where |
23 | * x is the bus number and y the device number. | |
24 | * | |
25 | * It allows user space programs/"drivers" to communicate directly | |
26 | * with USB devices without intervening kernel driver. | |
27 | * | |
28 | * Revision history | |
29 | * 22.12.1999 0.1 Initial release (split from proc_usb.c) | |
30 | * 04.01.2000 0.2 Turned into its own filesystem | |
46113830 HW |
31 | * 30.09.2005 0.3 Fix user-triggerable oops in async URB delivery |
32 | * (CAN-2005-3055) | |
1da177e4 LT |
33 | */ |
34 | ||
35 | /*****************************************************************************/ | |
36 | ||
37 | #include <linux/fs.h> | |
38 | #include <linux/mm.h> | |
39 | #include <linux/slab.h> | |
40 | #include <linux/smp_lock.h> | |
41 | #include <linux/signal.h> | |
42 | #include <linux/poll.h> | |
43 | #include <linux/module.h> | |
44 | #include <linux/usb.h> | |
45 | #include <linux/usbdevice_fs.h> | |
fbf82fd2 | 46 | #include <linux/cdev.h> |
a7b986b3 | 47 | #include <linux/notifier.h> |
7a01955f | 48 | #include <linux/security.h> |
1da177e4 LT |
49 | #include <asm/uaccess.h> |
50 | #include <asm/byteorder.h> | |
51 | #include <linux/moduleparam.h> | |
52 | ||
53 | #include "hcd.h" /* for usbcore internals */ | |
54 | #include "usb.h" | |
7cbe5dca | 55 | #include "hub.h" |
1da177e4 | 56 | |
fbf82fd2 KS |
57 | #define USB_MAXBUS 64 |
58 | #define USB_DEVICE_MAX USB_MAXBUS * 128 | |
fbf82fd2 | 59 | |
4a2a8a2c AS |
60 | /* Mutual exclusion for removal, open, and release */ |
61 | DEFINE_MUTEX(usbfs_mutex); | |
62 | ||
cd9f0375 AS |
63 | struct dev_state { |
64 | struct list_head list; /* state list */ | |
65 | struct usb_device *dev; | |
66 | struct file *file; | |
67 | spinlock_t lock; /* protects the async urb lists */ | |
68 | struct list_head async_pending; | |
69 | struct list_head async_completed; | |
70 | wait_queue_head_t wait; /* wake up if a request completed */ | |
71 | unsigned int discsignr; | |
72 | struct pid *disc_pid; | |
73 | uid_t disc_uid, disc_euid; | |
74 | void __user *disccontext; | |
75 | unsigned long ifclaimed; | |
76 | u32 secid; | |
01c6460f | 77 | u32 disabled_bulk_eps; |
cd9f0375 AS |
78 | }; |
79 | ||
1da177e4 LT |
80 | struct async { |
81 | struct list_head asynclist; | |
82 | struct dev_state *ps; | |
2425c08b | 83 | struct pid *pid; |
46113830 | 84 | uid_t uid, euid; |
1da177e4 LT |
85 | unsigned int signr; |
86 | unsigned int ifnum; | |
87 | void __user *userbuffer; | |
88 | void __user *userurb; | |
89 | struct urb *urb; | |
e015268d | 90 | int status; |
7a01955f | 91 | u32 secid; |
01c6460f AS |
92 | u8 bulk_addr; |
93 | u8 bulk_status; | |
1da177e4 LT |
94 | }; |
95 | ||
04e482ff GKH |
96 | static int usbfs_snoop; |
97 | module_param(usbfs_snoop, bool, S_IRUGO | S_IWUSR); | |
98 | MODULE_PARM_DESC(usbfs_snoop, "true to log all usbfs traffic"); | |
1da177e4 LT |
99 | |
100 | #define snoop(dev, format, arg...) \ | |
101 | do { \ | |
102 | if (usbfs_snoop) \ | |
04e482ff | 103 | dev_info(dev , format , ## arg); \ |
1da177e4 LT |
104 | } while (0) |
105 | ||
4c6e8971 AS |
106 | enum snoop_when { |
107 | SUBMIT, COMPLETE | |
108 | }; | |
fad21bdf | 109 | |
4c6e8971 | 110 | #define USB_DEVICE_DEV MKDEV(USB_DEVICE_MAJOR, 0) |
1da177e4 LT |
111 | |
112 | #define MAX_USBFS_BUFFER_SIZE 16384 | |
113 | ||
4c6e8971 | 114 | |
d34d9721 | 115 | static int connected(struct dev_state *ps) |
1da177e4 | 116 | { |
349710c3 AS |
117 | return (!list_empty(&ps->list) && |
118 | ps->dev->state != USB_STATE_NOTATTACHED); | |
1da177e4 LT |
119 | } |
120 | ||
121 | static loff_t usbdev_lseek(struct file *file, loff_t offset, int orig) | |
122 | { | |
123 | loff_t ret; | |
124 | ||
125 | lock_kernel(); | |
126 | ||
127 | switch (orig) { | |
128 | case 0: | |
129 | file->f_pos = offset; | |
130 | ret = file->f_pos; | |
131 | break; | |
132 | case 1: | |
133 | file->f_pos += offset; | |
134 | ret = file->f_pos; | |
135 | break; | |
136 | case 2: | |
137 | default: | |
138 | ret = -EINVAL; | |
139 | } | |
140 | ||
141 | unlock_kernel(); | |
142 | return ret; | |
143 | } | |
144 | ||
04e482ff GKH |
145 | static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes, |
146 | loff_t *ppos) | |
1da177e4 | 147 | { |
ec17cf1c | 148 | struct dev_state *ps = file->private_data; |
1da177e4 LT |
149 | struct usb_device *dev = ps->dev; |
150 | ssize_t ret = 0; | |
151 | unsigned len; | |
152 | loff_t pos; | |
153 | int i; | |
154 | ||
155 | pos = *ppos; | |
156 | usb_lock_device(dev); | |
349710c3 | 157 | if (!connected(ps)) { |
1da177e4 LT |
158 | ret = -ENODEV; |
159 | goto err; | |
160 | } else if (pos < 0) { | |
161 | ret = -EINVAL; | |
162 | goto err; | |
163 | } | |
164 | ||
165 | if (pos < sizeof(struct usb_device_descriptor)) { | |
04e482ff GKH |
166 | /* 18 bytes - fits on the stack */ |
167 | struct usb_device_descriptor temp_desc; | |
8781ba0a ON |
168 | |
169 | memcpy(&temp_desc, &dev->descriptor, sizeof(dev->descriptor)); | |
9fcd5c32 AM |
170 | le16_to_cpus(&temp_desc.bcdUSB); |
171 | le16_to_cpus(&temp_desc.idVendor); | |
172 | le16_to_cpus(&temp_desc.idProduct); | |
173 | le16_to_cpus(&temp_desc.bcdDevice); | |
1da177e4 LT |
174 | |
175 | len = sizeof(struct usb_device_descriptor) - pos; | |
176 | if (len > nbytes) | |
177 | len = nbytes; | |
8781ba0a | 178 | if (copy_to_user(buf, ((char *)&temp_desc) + pos, len)) { |
1da177e4 LT |
179 | ret = -EFAULT; |
180 | goto err; | |
181 | } | |
1da177e4 LT |
182 | |
183 | *ppos += len; | |
184 | buf += len; | |
185 | nbytes -= len; | |
186 | ret += len; | |
187 | } | |
188 | ||
189 | pos = sizeof(struct usb_device_descriptor); | |
190 | for (i = 0; nbytes && i < dev->descriptor.bNumConfigurations; i++) { | |
191 | struct usb_config_descriptor *config = | |
192 | (struct usb_config_descriptor *)dev->rawdescriptors[i]; | |
193 | unsigned int length = le16_to_cpu(config->wTotalLength); | |
194 | ||
195 | if (*ppos < pos + length) { | |
196 | ||
197 | /* The descriptor may claim to be longer than it | |
198 | * really is. Here is the actual allocated length. */ | |
199 | unsigned alloclen = | |
200 | le16_to_cpu(dev->config[i].desc.wTotalLength); | |
201 | ||
202 | len = length - (*ppos - pos); | |
203 | if (len > nbytes) | |
204 | len = nbytes; | |
205 | ||
206 | /* Simply don't write (skip over) unallocated parts */ | |
207 | if (alloclen > (*ppos - pos)) { | |
208 | alloclen -= (*ppos - pos); | |
209 | if (copy_to_user(buf, | |
210 | dev->rawdescriptors[i] + (*ppos - pos), | |
211 | min(len, alloclen))) { | |
212 | ret = -EFAULT; | |
213 | goto err; | |
214 | } | |
215 | } | |
216 | ||
217 | *ppos += len; | |
218 | buf += len; | |
219 | nbytes -= len; | |
220 | ret += len; | |
221 | } | |
222 | ||
223 | pos += length; | |
224 | } | |
225 | ||
226 | err: | |
227 | usb_unlock_device(dev); | |
228 | return ret; | |
229 | } | |
230 | ||
231 | /* | |
232 | * async list handling | |
233 | */ | |
234 | ||
235 | static struct async *alloc_async(unsigned int numisoframes) | |
236 | { | |
dd95b814 | 237 | struct async *as; |
0a1ef3b5 | 238 | |
dd95b814 | 239 | as = kzalloc(sizeof(struct async), GFP_KERNEL); |
04e482ff GKH |
240 | if (!as) |
241 | return NULL; | |
1da177e4 LT |
242 | as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL); |
243 | if (!as->urb) { | |
244 | kfree(as); | |
245 | return NULL; | |
246 | } | |
04e482ff | 247 | return as; |
1da177e4 LT |
248 | } |
249 | ||
250 | static void free_async(struct async *as) | |
251 | { | |
2425c08b | 252 | put_pid(as->pid); |
6fd19f4b JJ |
253 | kfree(as->urb->transfer_buffer); |
254 | kfree(as->urb->setup_packet); | |
1da177e4 | 255 | usb_free_urb(as->urb); |
6fd19f4b | 256 | kfree(as); |
1da177e4 LT |
257 | } |
258 | ||
d34d9721 | 259 | static void async_newpending(struct async *as) |
1da177e4 | 260 | { |
04e482ff GKH |
261 | struct dev_state *ps = as->ps; |
262 | unsigned long flags; | |
263 | ||
264 | spin_lock_irqsave(&ps->lock, flags); | |
265 | list_add_tail(&as->asynclist, &ps->async_pending); | |
266 | spin_unlock_irqrestore(&ps->lock, flags); | |
1da177e4 LT |
267 | } |
268 | ||
d34d9721 | 269 | static void async_removepending(struct async *as) |
1da177e4 | 270 | { |
04e482ff GKH |
271 | struct dev_state *ps = as->ps; |
272 | unsigned long flags; | |
273 | ||
274 | spin_lock_irqsave(&ps->lock, flags); | |
275 | list_del_init(&as->asynclist); | |
276 | spin_unlock_irqrestore(&ps->lock, flags); | |
1da177e4 LT |
277 | } |
278 | ||
d34d9721 | 279 | static struct async *async_getcompleted(struct dev_state *ps) |
1da177e4 | 280 | { |
04e482ff GKH |
281 | unsigned long flags; |
282 | struct async *as = NULL; | |
283 | ||
284 | spin_lock_irqsave(&ps->lock, flags); | |
285 | if (!list_empty(&ps->async_completed)) { | |
286 | as = list_entry(ps->async_completed.next, struct async, | |
287 | asynclist); | |
288 | list_del_init(&as->asynclist); | |
289 | } | |
290 | spin_unlock_irqrestore(&ps->lock, flags); | |
291 | return as; | |
1da177e4 LT |
292 | } |
293 | ||
d34d9721 | 294 | static struct async *async_getpending(struct dev_state *ps, |
04e482ff | 295 | void __user *userurb) |
1da177e4 | 296 | { |
04e482ff GKH |
297 | unsigned long flags; |
298 | struct async *as; | |
1da177e4 | 299 | |
04e482ff | 300 | spin_lock_irqsave(&ps->lock, flags); |
1da177e4 LT |
301 | list_for_each_entry(as, &ps->async_pending, asynclist) |
302 | if (as->userurb == userurb) { | |
303 | list_del_init(&as->asynclist); | |
304 | spin_unlock_irqrestore(&ps->lock, flags); | |
305 | return as; | |
306 | } | |
04e482ff GKH |
307 | spin_unlock_irqrestore(&ps->lock, flags); |
308 | return NULL; | |
1da177e4 LT |
309 | } |
310 | ||
4c6e8971 AS |
311 | static void snoop_urb(struct usb_device *udev, |
312 | void __user *userurb, int pipe, unsigned length, | |
313 | int timeout_or_status, enum snoop_when when) | |
e639dd3f | 314 | { |
4c6e8971 AS |
315 | static const char *types[] = {"isoc", "int", "ctrl", "bulk"}; |
316 | static const char *dirs[] = {"out", "in"}; | |
317 | int ep; | |
318 | const char *t, *d; | |
e639dd3f GKH |
319 | |
320 | if (!usbfs_snoop) | |
321 | return; | |
322 | ||
4c6e8971 AS |
323 | ep = usb_pipeendpoint(pipe); |
324 | t = types[usb_pipetype(pipe)]; | |
325 | d = dirs[!!usb_pipein(pipe)]; | |
326 | ||
327 | if (userurb) { /* Async */ | |
328 | if (when == SUBMIT) | |
329 | dev_info(&udev->dev, "userurb %p, ep%d %s-%s, " | |
330 | "length %u\n", | |
331 | userurb, ep, t, d, length); | |
332 | else | |
333 | dev_info(&udev->dev, "userurb %p, ep%d %s-%s, " | |
334 | "actual_length %u status %d\n", | |
335 | userurb, ep, t, d, length, | |
336 | timeout_or_status); | |
337 | } else { | |
338 | if (when == SUBMIT) | |
339 | dev_info(&udev->dev, "ep%d %s-%s, length %u, " | |
340 | "timeout %d\n", | |
341 | ep, t, d, length, timeout_or_status); | |
342 | else | |
343 | dev_info(&udev->dev, "ep%d %s-%s, actual_length %u, " | |
344 | "status %d\n", | |
345 | ep, t, d, length, timeout_or_status); | |
346 | } | |
e639dd3f GKH |
347 | } |
348 | ||
01c6460f AS |
349 | #define AS_CONTINUATION 1 |
350 | #define AS_UNLINK 2 | |
351 | ||
352 | static void cancel_bulk_urbs(struct dev_state *ps, unsigned bulk_addr) | |
353 | __releases(ps->lock) | |
354 | __acquires(ps->lock) | |
355 | { | |
356 | struct async *as; | |
357 | ||
358 | /* Mark all the pending URBs that match bulk_addr, up to but not | |
359 | * including the first one without AS_CONTINUATION. If such an | |
360 | * URB is encountered then a new transfer has already started so | |
361 | * the endpoint doesn't need to be disabled; otherwise it does. | |
362 | */ | |
363 | list_for_each_entry(as, &ps->async_pending, asynclist) { | |
364 | if (as->bulk_addr == bulk_addr) { | |
365 | if (as->bulk_status != AS_CONTINUATION) | |
366 | goto rescan; | |
367 | as->bulk_status = AS_UNLINK; | |
368 | as->bulk_addr = 0; | |
369 | } | |
370 | } | |
371 | ps->disabled_bulk_eps |= (1 << bulk_addr); | |
372 | ||
373 | /* Now carefully unlink all the marked pending URBs */ | |
374 | rescan: | |
375 | list_for_each_entry(as, &ps->async_pending, asynclist) { | |
376 | if (as->bulk_status == AS_UNLINK) { | |
377 | as->bulk_status = 0; /* Only once */ | |
378 | spin_unlock(&ps->lock); /* Allow completions */ | |
379 | usb_unlink_urb(as->urb); | |
380 | spin_lock(&ps->lock); | |
381 | goto rescan; | |
382 | } | |
383 | } | |
384 | } | |
385 | ||
7d12e780 | 386 | static void async_completed(struct urb *urb) |
1da177e4 | 387 | { |
04e482ff GKH |
388 | struct async *as = urb->context; |
389 | struct dev_state *ps = as->ps; | |
1da177e4 | 390 | struct siginfo sinfo; |
516a1a07 ON |
391 | struct pid *pid = NULL; |
392 | uid_t uid = 0; | |
393 | uid_t euid = 0; | |
394 | u32 secid = 0; | |
395 | int signr; | |
1da177e4 | 396 | |
04e482ff GKH |
397 | spin_lock(&ps->lock); |
398 | list_move_tail(&as->asynclist, &ps->async_completed); | |
e015268d | 399 | as->status = urb->status; |
516a1a07 ON |
400 | signr = as->signr; |
401 | if (signr) { | |
1da177e4 | 402 | sinfo.si_signo = as->signr; |
e015268d | 403 | sinfo.si_errno = as->status; |
1da177e4 LT |
404 | sinfo.si_code = SI_ASYNCIO; |
405 | sinfo.si_addr = as->userurb; | |
516a1a07 ON |
406 | pid = as->pid; |
407 | uid = as->uid; | |
408 | euid = as->euid; | |
409 | secid = as->secid; | |
1da177e4 | 410 | } |
e639dd3f | 411 | snoop(&urb->dev->dev, "urb complete\n"); |
4c6e8971 AS |
412 | snoop_urb(urb->dev, as->userurb, urb->pipe, urb->actual_length, |
413 | as->status, COMPLETE); | |
01c6460f AS |
414 | if (as->status < 0 && as->bulk_addr && as->status != -ECONNRESET && |
415 | as->status != -ENOENT) | |
416 | cancel_bulk_urbs(ps, as->bulk_addr); | |
516a1a07 ON |
417 | spin_unlock(&ps->lock); |
418 | ||
419 | if (signr) | |
420 | kill_pid_info_as_uid(sinfo.si_signo, &sinfo, pid, uid, | |
421 | euid, secid); | |
422 | ||
e639dd3f | 423 | wake_up(&ps->wait); |
1da177e4 LT |
424 | } |
425 | ||
04e482ff | 426 | static void destroy_async(struct dev_state *ps, struct list_head *list) |
1da177e4 LT |
427 | { |
428 | struct async *as; | |
429 | unsigned long flags; | |
430 | ||
431 | spin_lock_irqsave(&ps->lock, flags); | |
432 | while (!list_empty(list)) { | |
433 | as = list_entry(list->next, struct async, asynclist); | |
434 | list_del_init(&as->asynclist); | |
435 | ||
436 | /* drop the spinlock so the completion handler can run */ | |
437 | spin_unlock_irqrestore(&ps->lock, flags); | |
438 | usb_kill_urb(as->urb); | |
439 | spin_lock_irqsave(&ps->lock, flags); | |
440 | } | |
441 | spin_unlock_irqrestore(&ps->lock, flags); | |
1da177e4 LT |
442 | } |
443 | ||
04e482ff GKH |
444 | static void destroy_async_on_interface(struct dev_state *ps, |
445 | unsigned int ifnum) | |
1da177e4 LT |
446 | { |
447 | struct list_head *p, *q, hitlist; | |
448 | unsigned long flags; | |
449 | ||
450 | INIT_LIST_HEAD(&hitlist); | |
451 | spin_lock_irqsave(&ps->lock, flags); | |
452 | list_for_each_safe(p, q, &ps->async_pending) | |
453 | if (ifnum == list_entry(p, struct async, asynclist)->ifnum) | |
454 | list_move_tail(p, &hitlist); | |
455 | spin_unlock_irqrestore(&ps->lock, flags); | |
456 | destroy_async(ps, &hitlist); | |
457 | } | |
458 | ||
d34d9721 | 459 | static void destroy_all_async(struct dev_state *ps) |
1da177e4 | 460 | { |
04e482ff | 461 | destroy_async(ps, &ps->async_pending); |
1da177e4 LT |
462 | } |
463 | ||
464 | /* | |
465 | * interface claims are made only at the request of user level code, | |
466 | * which can also release them (explicitly or by closing files). | |
467 | * they're also undone when devices disconnect. | |
468 | */ | |
469 | ||
04e482ff GKH |
470 | static int driver_probe(struct usb_interface *intf, |
471 | const struct usb_device_id *id) | |
1da177e4 LT |
472 | { |
473 | return -ENODEV; | |
474 | } | |
475 | ||
476 | static void driver_disconnect(struct usb_interface *intf) | |
477 | { | |
04e482ff | 478 | struct dev_state *ps = usb_get_intfdata(intf); |
1da177e4 LT |
479 | unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber; |
480 | ||
481 | if (!ps) | |
482 | return; | |
483 | ||
484 | /* NOTE: this relies on usbcore having canceled and completed | |
485 | * all pending I/O requests; 2.6 does that. | |
486 | */ | |
487 | ||
488 | if (likely(ifnum < 8*sizeof(ps->ifclaimed))) | |
489 | clear_bit(ifnum, &ps->ifclaimed); | |
490 | else | |
3b6004f3 GKH |
491 | dev_warn(&intf->dev, "interface number %u out of range\n", |
492 | ifnum); | |
1da177e4 | 493 | |
04e482ff | 494 | usb_set_intfdata(intf, NULL); |
1da177e4 LT |
495 | |
496 | /* force async requests to complete */ | |
497 | destroy_async_on_interface(ps, ifnum); | |
498 | } | |
499 | ||
2e2eb83f AS |
500 | /* The following routines are merely placeholders. There is no way |
501 | * to inform a user task about suspend or resumes. | |
502 | */ | |
503 | static int driver_suspend(struct usb_interface *intf, pm_message_t msg) | |
504 | { | |
505 | return 0; | |
506 | } | |
507 | ||
508 | static int driver_resume(struct usb_interface *intf) | |
509 | { | |
510 | return 0; | |
511 | } | |
512 | ||
1da177e4 | 513 | struct usb_driver usbfs_driver = { |
1da177e4 LT |
514 | .name = "usbfs", |
515 | .probe = driver_probe, | |
516 | .disconnect = driver_disconnect, | |
2e2eb83f AS |
517 | .suspend = driver_suspend, |
518 | .resume = driver_resume, | |
1da177e4 LT |
519 | }; |
520 | ||
521 | static int claimintf(struct dev_state *ps, unsigned int ifnum) | |
522 | { | |
523 | struct usb_device *dev = ps->dev; | |
524 | struct usb_interface *intf; | |
525 | int err; | |
526 | ||
527 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
528 | return -EINVAL; | |
529 | /* already claimed */ | |
530 | if (test_bit(ifnum, &ps->ifclaimed)) | |
531 | return 0; | |
532 | ||
1da177e4 LT |
533 | intf = usb_ifnum_to_if(dev, ifnum); |
534 | if (!intf) | |
535 | err = -ENOENT; | |
536 | else | |
537 | err = usb_driver_claim_interface(&usbfs_driver, intf, ps); | |
1da177e4 LT |
538 | if (err == 0) |
539 | set_bit(ifnum, &ps->ifclaimed); | |
540 | return err; | |
541 | } | |
542 | ||
543 | static int releaseintf(struct dev_state *ps, unsigned int ifnum) | |
544 | { | |
545 | struct usb_device *dev; | |
546 | struct usb_interface *intf; | |
547 | int err; | |
548 | ||
549 | err = -EINVAL; | |
550 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
551 | return err; | |
552 | dev = ps->dev; | |
1da177e4 LT |
553 | intf = usb_ifnum_to_if(dev, ifnum); |
554 | if (!intf) | |
555 | err = -ENOENT; | |
556 | else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) { | |
557 | usb_driver_release_interface(&usbfs_driver, intf); | |
558 | err = 0; | |
559 | } | |
1da177e4 LT |
560 | return err; |
561 | } | |
562 | ||
563 | static int checkintf(struct dev_state *ps, unsigned int ifnum) | |
564 | { | |
565 | if (ps->dev->state != USB_STATE_CONFIGURED) | |
566 | return -EHOSTUNREACH; | |
567 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
568 | return -EINVAL; | |
569 | if (test_bit(ifnum, &ps->ifclaimed)) | |
570 | return 0; | |
571 | /* if not yet claimed, claim it for the driver */ | |
04e482ff GKH |
572 | dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim " |
573 | "interface %u before use\n", task_pid_nr(current), | |
574 | current->comm, ifnum); | |
1da177e4 LT |
575 | return claimintf(ps, ifnum); |
576 | } | |
577 | ||
578 | static int findintfep(struct usb_device *dev, unsigned int ep) | |
579 | { | |
580 | unsigned int i, j, e; | |
04e482ff | 581 | struct usb_interface *intf; |
1da177e4 LT |
582 | struct usb_host_interface *alts; |
583 | struct usb_endpoint_descriptor *endpt; | |
584 | ||
585 | if (ep & ~(USB_DIR_IN|0xf)) | |
586 | return -EINVAL; | |
587 | if (!dev->actconfig) | |
588 | return -ESRCH; | |
589 | for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) { | |
590 | intf = dev->actconfig->interface[i]; | |
591 | for (j = 0; j < intf->num_altsetting; j++) { | |
04e482ff | 592 | alts = &intf->altsetting[j]; |
1da177e4 LT |
593 | for (e = 0; e < alts->desc.bNumEndpoints; e++) { |
594 | endpt = &alts->endpoint[e].desc; | |
595 | if (endpt->bEndpointAddress == ep) | |
596 | return alts->desc.bInterfaceNumber; | |
597 | } | |
598 | } | |
599 | } | |
04e482ff | 600 | return -ENOENT; |
1da177e4 LT |
601 | } |
602 | ||
04e482ff GKH |
603 | static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype, |
604 | unsigned int index) | |
1da177e4 LT |
605 | { |
606 | int ret = 0; | |
607 | ||
6da9c990 DV |
608 | if (ps->dev->state != USB_STATE_UNAUTHENTICATED |
609 | && ps->dev->state != USB_STATE_ADDRESS | |
24f8b116 | 610 | && ps->dev->state != USB_STATE_CONFIGURED) |
1da177e4 LT |
611 | return -EHOSTUNREACH; |
612 | if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype)) | |
613 | return 0; | |
614 | ||
615 | index &= 0xff; | |
616 | switch (requesttype & USB_RECIP_MASK) { | |
617 | case USB_RECIP_ENDPOINT: | |
04e482ff GKH |
618 | ret = findintfep(ps->dev, index); |
619 | if (ret >= 0) | |
1da177e4 LT |
620 | ret = checkintf(ps, ret); |
621 | break; | |
622 | ||
623 | case USB_RECIP_INTERFACE: | |
624 | ret = checkintf(ps, index); | |
625 | break; | |
626 | } | |
627 | return ret; | |
628 | } | |
629 | ||
61ad04a8 | 630 | static int match_devt(struct device *dev, void *data) |
4592bf5a | 631 | { |
a80d5ff0 | 632 | return dev->devt == (dev_t) (unsigned long) data; |
9f8b17e6 | 633 | } |
4592bf5a | 634 | |
61ad04a8 | 635 | static struct usb_device *usbdev_lookup_by_devt(dev_t devt) |
9f8b17e6 KS |
636 | { |
637 | struct device *dev; | |
638 | ||
a80d5ff0 DH |
639 | dev = bus_find_device(&usb_bus_type, NULL, |
640 | (void *) (unsigned long) devt, match_devt); | |
9f8b17e6 KS |
641 | if (!dev) |
642 | return NULL; | |
9f8b17e6 KS |
643 | return container_of(dev, struct usb_device, dev); |
644 | } | |
4592bf5a | 645 | |
1da177e4 LT |
646 | /* |
647 | * file operations | |
648 | */ | |
649 | static int usbdev_open(struct inode *inode, struct file *file) | |
650 | { | |
fbf82fd2 | 651 | struct usb_device *dev = NULL; |
1da177e4 | 652 | struct dev_state *ps; |
86a264ab | 653 | const struct cred *cred = current_cred(); |
1da177e4 LT |
654 | int ret; |
655 | ||
b5b4aa67 | 656 | lock_kernel(); |
4a2a8a2c AS |
657 | /* Protect against simultaneous removal or release */ |
658 | mutex_lock(&usbfs_mutex); | |
659 | ||
1da177e4 | 660 | ret = -ENOMEM; |
04e482ff GKH |
661 | ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL); |
662 | if (!ps) | |
4a2a8a2c | 663 | goto out; |
1da177e4 | 664 | |
01105a24 | 665 | ret = -ENODEV; |
61ad04a8 | 666 | |
9f8b17e6 | 667 | /* usbdev device-node */ |
fbf82fd2 | 668 | if (imajor(inode) == USB_DEVICE_MAJOR) |
61ad04a8 | 669 | dev = usbdev_lookup_by_devt(inode->i_rdev); |
9f8b17e6 KS |
670 | #ifdef CONFIG_USB_DEVICEFS |
671 | /* procfs file */ | |
d64aac36 | 672 | if (!dev) { |
8e18e294 | 673 | dev = inode->i_private; |
d64aac36 AS |
674 | if (dev && dev->usbfs_dentry && |
675 | dev->usbfs_dentry->d_inode == inode) | |
676 | usb_get_dev(dev); | |
677 | else | |
678 | dev = NULL; | |
679 | } | |
9f8b17e6 | 680 | #endif |
d64aac36 | 681 | if (!dev || dev->state == USB_STATE_NOTATTACHED) |
1da177e4 | 682 | goto out; |
94fcda1f | 683 | ret = usb_autoresume_device(dev); |
01d883d4 AS |
684 | if (ret) |
685 | goto out; | |
686 | ||
1da177e4 LT |
687 | ret = 0; |
688 | ps->dev = dev; | |
689 | ps->file = file; | |
690 | spin_lock_init(&ps->lock); | |
316547fd | 691 | INIT_LIST_HEAD(&ps->list); |
1da177e4 LT |
692 | INIT_LIST_HEAD(&ps->async_pending); |
693 | INIT_LIST_HEAD(&ps->async_completed); | |
694 | init_waitqueue_head(&ps->wait); | |
695 | ps->discsignr = 0; | |
2425c08b | 696 | ps->disc_pid = get_pid(task_pid(current)); |
86a264ab DH |
697 | ps->disc_uid = cred->uid; |
698 | ps->disc_euid = cred->euid; | |
1da177e4 LT |
699 | ps->disccontext = NULL; |
700 | ps->ifclaimed = 0; | |
7a01955f | 701 | security_task_getsecid(current, &ps->secid); |
527660a8 | 702 | smp_wmb(); |
1da177e4 LT |
703 | list_add_tail(&ps->list, &dev->filelist); |
704 | file->private_data = ps; | |
2da41d5f AS |
705 | snoop(&dev->dev, "opened by process %d: %s\n", task_pid_nr(current), |
706 | current->comm); | |
1da177e4 | 707 | out: |
d64aac36 | 708 | if (ret) { |
01d883d4 | 709 | kfree(ps); |
d64aac36 AS |
710 | usb_put_dev(dev); |
711 | } | |
4a2a8a2c | 712 | mutex_unlock(&usbfs_mutex); |
b5b4aa67 | 713 | unlock_kernel(); |
4a2a8a2c | 714 | return ret; |
1da177e4 LT |
715 | } |
716 | ||
717 | static int usbdev_release(struct inode *inode, struct file *file) | |
718 | { | |
ec17cf1c | 719 | struct dev_state *ps = file->private_data; |
1da177e4 LT |
720 | struct usb_device *dev = ps->dev; |
721 | unsigned int ifnum; | |
6ff10464 | 722 | struct async *as; |
1da177e4 LT |
723 | |
724 | usb_lock_device(dev); | |
7cbe5dca | 725 | usb_hub_release_all_ports(dev, ps); |
4a2a8a2c AS |
726 | |
727 | /* Protect against simultaneous open */ | |
728 | mutex_lock(&usbfs_mutex); | |
1da177e4 | 729 | list_del_init(&ps->list); |
4a2a8a2c AS |
730 | mutex_unlock(&usbfs_mutex); |
731 | ||
1da177e4 LT |
732 | for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed); |
733 | ifnum++) { | |
734 | if (test_bit(ifnum, &ps->ifclaimed)) | |
735 | releaseintf(ps, ifnum); | |
736 | } | |
737 | destroy_all_async(ps); | |
94fcda1f | 738 | usb_autosuspend_device(dev); |
1da177e4 LT |
739 | usb_unlock_device(dev); |
740 | usb_put_dev(dev); | |
2425c08b | 741 | put_pid(ps->disc_pid); |
6ff10464 AS |
742 | |
743 | as = async_getcompleted(ps); | |
744 | while (as) { | |
745 | free_async(as); | |
746 | as = async_getcompleted(ps); | |
747 | } | |
1da177e4 | 748 | kfree(ps); |
4a2a8a2c | 749 | return 0; |
1da177e4 LT |
750 | } |
751 | ||
752 | static int proc_control(struct dev_state *ps, void __user *arg) | |
753 | { | |
754 | struct usb_device *dev = ps->dev; | |
755 | struct usbdevfs_ctrltransfer ctrl; | |
756 | unsigned int tmo; | |
757 | unsigned char *tbuf; | |
ff66e3ce | 758 | unsigned wLength; |
4c6e8971 | 759 | int i, pipe, ret; |
1da177e4 LT |
760 | |
761 | if (copy_from_user(&ctrl, arg, sizeof(ctrl))) | |
762 | return -EFAULT; | |
04e482ff GKH |
763 | ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.wIndex); |
764 | if (ret) | |
1da177e4 | 765 | return ret; |
ff66e3ce AM |
766 | wLength = ctrl.wLength; /* To suppress 64k PAGE_SIZE warning */ |
767 | if (wLength > PAGE_SIZE) | |
1da177e4 | 768 | return -EINVAL; |
04e482ff GKH |
769 | tbuf = (unsigned char *)__get_free_page(GFP_KERNEL); |
770 | if (!tbuf) | |
1da177e4 LT |
771 | return -ENOMEM; |
772 | tmo = ctrl.timeout; | |
773 | if (ctrl.bRequestType & 0x80) { | |
04e482ff GKH |
774 | if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data, |
775 | ctrl.wLength)) { | |
1da177e4 LT |
776 | free_page((unsigned long)tbuf); |
777 | return -EINVAL; | |
778 | } | |
4c6e8971 AS |
779 | pipe = usb_rcvctrlpipe(dev, 0); |
780 | snoop_urb(dev, NULL, pipe, ctrl.wLength, tmo, SUBMIT); | |
1da177e4 LT |
781 | |
782 | usb_unlock_device(dev); | |
4c6e8971 | 783 | i = usb_control_msg(dev, pipe, ctrl.bRequest, |
04e482ff GKH |
784 | ctrl.bRequestType, ctrl.wValue, ctrl.wIndex, |
785 | tbuf, ctrl.wLength, tmo); | |
1da177e4 | 786 | usb_lock_device(dev); |
4c6e8971 AS |
787 | snoop_urb(dev, NULL, pipe, max(i, 0), min(i, 0), COMPLETE); |
788 | ||
1da177e4 | 789 | if ((i > 0) && ctrl.wLength) { |
fe0410c7 | 790 | if (copy_to_user(ctrl.data, tbuf, i)) { |
1da177e4 LT |
791 | free_page((unsigned long)tbuf); |
792 | return -EFAULT; | |
793 | } | |
794 | } | |
795 | } else { | |
796 | if (ctrl.wLength) { | |
797 | if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) { | |
798 | free_page((unsigned long)tbuf); | |
799 | return -EFAULT; | |
800 | } | |
801 | } | |
4c6e8971 AS |
802 | pipe = usb_sndctrlpipe(dev, 0); |
803 | snoop_urb(dev, NULL, pipe, ctrl.wLength, tmo, SUBMIT); | |
804 | ||
1da177e4 | 805 | usb_unlock_device(dev); |
04e482ff GKH |
806 | i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest, |
807 | ctrl.bRequestType, ctrl.wValue, ctrl.wIndex, | |
808 | tbuf, ctrl.wLength, tmo); | |
1da177e4 | 809 | usb_lock_device(dev); |
4c6e8971 | 810 | snoop_urb(dev, NULL, pipe, max(i, 0), min(i, 0), COMPLETE); |
1da177e4 LT |
811 | } |
812 | free_page((unsigned long)tbuf); | |
04e482ff | 813 | if (i < 0 && i != -EPIPE) { |
1da177e4 LT |
814 | dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL " |
815 | "failed cmd %s rqt %u rq %u len %u ret %d\n", | |
816 | current->comm, ctrl.bRequestType, ctrl.bRequest, | |
817 | ctrl.wLength, i); | |
818 | } | |
819 | return i; | |
820 | } | |
821 | ||
822 | static int proc_bulk(struct dev_state *ps, void __user *arg) | |
823 | { | |
824 | struct usb_device *dev = ps->dev; | |
825 | struct usbdevfs_bulktransfer bulk; | |
826 | unsigned int tmo, len1, pipe; | |
827 | int len2; | |
828 | unsigned char *tbuf; | |
4c6e8971 | 829 | int i, ret; |
1da177e4 LT |
830 | |
831 | if (copy_from_user(&bulk, arg, sizeof(bulk))) | |
832 | return -EFAULT; | |
04e482ff GKH |
833 | ret = findintfep(ps->dev, bulk.ep); |
834 | if (ret < 0) | |
1da177e4 | 835 | return ret; |
04e482ff GKH |
836 | ret = checkintf(ps, ret); |
837 | if (ret) | |
1da177e4 LT |
838 | return ret; |
839 | if (bulk.ep & USB_DIR_IN) | |
840 | pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f); | |
841 | else | |
842 | pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f); | |
843 | if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN))) | |
844 | return -EINVAL; | |
845 | len1 = bulk.len; | |
846 | if (len1 > MAX_USBFS_BUFFER_SIZE) | |
847 | return -EINVAL; | |
848 | if (!(tbuf = kmalloc(len1, GFP_KERNEL))) | |
849 | return -ENOMEM; | |
850 | tmo = bulk.timeout; | |
851 | if (bulk.ep & 0x80) { | |
852 | if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) { | |
853 | kfree(tbuf); | |
854 | return -EINVAL; | |
855 | } | |
4c6e8971 AS |
856 | snoop_urb(dev, NULL, pipe, len1, tmo, SUBMIT); |
857 | ||
1da177e4 LT |
858 | usb_unlock_device(dev); |
859 | i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo); | |
860 | usb_lock_device(dev); | |
4c6e8971 AS |
861 | snoop_urb(dev, NULL, pipe, len2, i, COMPLETE); |
862 | ||
1da177e4 LT |
863 | if (!i && len2) { |
864 | if (copy_to_user(bulk.data, tbuf, len2)) { | |
865 | kfree(tbuf); | |
866 | return -EFAULT; | |
867 | } | |
868 | } | |
869 | } else { | |
870 | if (len1) { | |
871 | if (copy_from_user(tbuf, bulk.data, len1)) { | |
872 | kfree(tbuf); | |
873 | return -EFAULT; | |
874 | } | |
875 | } | |
4c6e8971 AS |
876 | snoop_urb(dev, NULL, pipe, len1, tmo, SUBMIT); |
877 | ||
1da177e4 LT |
878 | usb_unlock_device(dev); |
879 | i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo); | |
880 | usb_lock_device(dev); | |
4c6e8971 | 881 | snoop_urb(dev, NULL, pipe, len2, i, COMPLETE); |
1da177e4 LT |
882 | } |
883 | kfree(tbuf); | |
884 | if (i < 0) | |
885 | return i; | |
886 | return len2; | |
887 | } | |
888 | ||
889 | static int proc_resetep(struct dev_state *ps, void __user *arg) | |
890 | { | |
891 | unsigned int ep; | |
892 | int ret; | |
893 | ||
894 | if (get_user(ep, (unsigned int __user *)arg)) | |
895 | return -EFAULT; | |
04e482ff GKH |
896 | ret = findintfep(ps->dev, ep); |
897 | if (ret < 0) | |
1da177e4 | 898 | return ret; |
04e482ff GKH |
899 | ret = checkintf(ps, ret); |
900 | if (ret) | |
1da177e4 | 901 | return ret; |
3444b26a | 902 | usb_reset_endpoint(ps->dev, ep); |
1da177e4 LT |
903 | return 0; |
904 | } | |
905 | ||
906 | static int proc_clearhalt(struct dev_state *ps, void __user *arg) | |
907 | { | |
908 | unsigned int ep; | |
909 | int pipe; | |
910 | int ret; | |
911 | ||
912 | if (get_user(ep, (unsigned int __user *)arg)) | |
913 | return -EFAULT; | |
04e482ff GKH |
914 | ret = findintfep(ps->dev, ep); |
915 | if (ret < 0) | |
1da177e4 | 916 | return ret; |
04e482ff GKH |
917 | ret = checkintf(ps, ret); |
918 | if (ret) | |
1da177e4 LT |
919 | return ret; |
920 | if (ep & USB_DIR_IN) | |
04e482ff GKH |
921 | pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f); |
922 | else | |
923 | pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f); | |
1da177e4 LT |
924 | |
925 | return usb_clear_halt(ps->dev, pipe); | |
926 | } | |
1da177e4 LT |
927 | |
928 | static int proc_getdriver(struct dev_state *ps, void __user *arg) | |
929 | { | |
930 | struct usbdevfs_getdriver gd; | |
931 | struct usb_interface *intf; | |
932 | int ret; | |
933 | ||
934 | if (copy_from_user(&gd, arg, sizeof(gd))) | |
935 | return -EFAULT; | |
1da177e4 LT |
936 | intf = usb_ifnum_to_if(ps->dev, gd.interface); |
937 | if (!intf || !intf->dev.driver) | |
938 | ret = -ENODATA; | |
939 | else { | |
940 | strncpy(gd.driver, intf->dev.driver->name, | |
941 | sizeof(gd.driver)); | |
942 | ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0); | |
943 | } | |
1da177e4 LT |
944 | return ret; |
945 | } | |
946 | ||
947 | static int proc_connectinfo(struct dev_state *ps, void __user *arg) | |
948 | { | |
949 | struct usbdevfs_connectinfo ci; | |
950 | ||
951 | ci.devnum = ps->dev->devnum; | |
952 | ci.slow = ps->dev->speed == USB_SPEED_LOW; | |
953 | if (copy_to_user(arg, &ci, sizeof(ci))) | |
954 | return -EFAULT; | |
955 | return 0; | |
956 | } | |
957 | ||
958 | static int proc_resetdevice(struct dev_state *ps) | |
959 | { | |
742120c6 | 960 | return usb_reset_device(ps->dev); |
1da177e4 LT |
961 | } |
962 | ||
963 | static int proc_setintf(struct dev_state *ps, void __user *arg) | |
964 | { | |
965 | struct usbdevfs_setinterface setintf; | |
966 | int ret; | |
967 | ||
968 | if (copy_from_user(&setintf, arg, sizeof(setintf))) | |
969 | return -EFAULT; | |
970 | if ((ret = checkintf(ps, setintf.interface))) | |
971 | return ret; | |
972 | return usb_set_interface(ps->dev, setintf.interface, | |
973 | setintf.altsetting); | |
974 | } | |
975 | ||
976 | static int proc_setconfig(struct dev_state *ps, void __user *arg) | |
977 | { | |
3f141e2a | 978 | int u; |
1da177e4 | 979 | int status = 0; |
04e482ff | 980 | struct usb_host_config *actconfig; |
1da177e4 | 981 | |
3f141e2a | 982 | if (get_user(u, (int __user *)arg)) |
1da177e4 LT |
983 | return -EFAULT; |
984 | ||
04e482ff GKH |
985 | actconfig = ps->dev->actconfig; |
986 | ||
987 | /* Don't touch the device if any interfaces are claimed. | |
988 | * It could interfere with other drivers' operations, and if | |
1da177e4 LT |
989 | * an interface is claimed by usbfs it could easily deadlock. |
990 | */ | |
04e482ff GKH |
991 | if (actconfig) { |
992 | int i; | |
993 | ||
994 | for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) { | |
995 | if (usb_interface_claimed(actconfig->interface[i])) { | |
996 | dev_warn(&ps->dev->dev, | |
72ebddb5 | 997 | "usbfs: interface %d claimed by %s " |
1da177e4 LT |
998 | "while '%s' sets config #%d\n", |
999 | actconfig->interface[i] | |
1000 | ->cur_altsetting | |
1001 | ->desc.bInterfaceNumber, | |
72ebddb5 DB |
1002 | actconfig->interface[i] |
1003 | ->dev.driver->name, | |
1da177e4 | 1004 | current->comm, u); |
04e482ff | 1005 | status = -EBUSY; |
1da177e4 | 1006 | break; |
1da177e4 | 1007 | } |
04e482ff GKH |
1008 | } |
1009 | } | |
1da177e4 LT |
1010 | |
1011 | /* SET_CONFIGURATION is often abused as a "cheap" driver reset, | |
1012 | * so avoid usb_set_configuration()'s kick to sysfs | |
1013 | */ | |
1014 | if (status == 0) { | |
1015 | if (actconfig && actconfig->desc.bConfigurationValue == u) | |
1016 | status = usb_reset_configuration(ps->dev); | |
1017 | else | |
1018 | status = usb_set_configuration(ps->dev, u); | |
1019 | } | |
1020 | ||
1021 | return status; | |
1022 | } | |
1023 | ||
1da177e4 | 1024 | static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb, |
04e482ff GKH |
1025 | struct usbdevfs_iso_packet_desc __user *iso_frame_desc, |
1026 | void __user *arg) | |
1da177e4 LT |
1027 | { |
1028 | struct usbdevfs_iso_packet_desc *isopkt = NULL; | |
1029 | struct usb_host_endpoint *ep; | |
1030 | struct async *as; | |
1031 | struct usb_ctrlrequest *dr = NULL; | |
86a264ab | 1032 | const struct cred *cred = current_cred(); |
1da177e4 | 1033 | unsigned int u, totlen, isofrmlen; |
97b9eb91 | 1034 | int ret, ifnum = -1; |
93cf9b90 | 1035 | int is_in; |
1da177e4 | 1036 | |
14722ef4 AS |
1037 | if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP | |
1038 | USBDEVFS_URB_SHORT_NOT_OK | | |
01c6460f | 1039 | USBDEVFS_URB_BULK_CONTINUATION | |
14722ef4 AS |
1040 | USBDEVFS_URB_NO_FSBR | |
1041 | USBDEVFS_URB_ZERO_PACKET | | |
1042 | USBDEVFS_URB_NO_INTERRUPT)) | |
1da177e4 | 1043 | return -EINVAL; |
9180135b | 1044 | if (uurb->buffer_length > 0 && !uurb->buffer) |
1da177e4 | 1045 | return -EINVAL; |
04e482ff GKH |
1046 | if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL && |
1047 | (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) { | |
1048 | ifnum = findintfep(ps->dev, uurb->endpoint); | |
1049 | if (ifnum < 0) | |
1da177e4 | 1050 | return ifnum; |
04e482ff GKH |
1051 | ret = checkintf(ps, ifnum); |
1052 | if (ret) | |
1da177e4 LT |
1053 | return ret; |
1054 | } | |
93cf9b90 AS |
1055 | if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0) { |
1056 | is_in = 1; | |
1057 | ep = ps->dev->ep_in[uurb->endpoint & USB_ENDPOINT_NUMBER_MASK]; | |
1058 | } else { | |
1059 | is_in = 0; | |
1060 | ep = ps->dev->ep_out[uurb->endpoint & USB_ENDPOINT_NUMBER_MASK]; | |
1061 | } | |
1da177e4 LT |
1062 | if (!ep) |
1063 | return -ENOENT; | |
1064 | switch(uurb->type) { | |
1065 | case USBDEVFS_URB_TYPE_CONTROL: | |
93cf9b90 | 1066 | if (!usb_endpoint_xfer_control(&ep->desc)) |
1da177e4 | 1067 | return -EINVAL; |
04e482ff GKH |
1068 | /* min 8 byte setup packet, |
1069 | * max 8 byte setup plus an arbitrary data stage */ | |
1070 | if (uurb->buffer_length < 8 || | |
1071 | uurb->buffer_length > (8 + MAX_USBFS_BUFFER_SIZE)) | |
1da177e4 | 1072 | return -EINVAL; |
04e482ff GKH |
1073 | dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL); |
1074 | if (!dr) | |
1da177e4 LT |
1075 | return -ENOMEM; |
1076 | if (copy_from_user(dr, uurb->buffer, 8)) { | |
1077 | kfree(dr); | |
1078 | return -EFAULT; | |
1079 | } | |
1080 | if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) { | |
1081 | kfree(dr); | |
1082 | return -EINVAL; | |
1083 | } | |
04e482ff GKH |
1084 | ret = check_ctrlrecip(ps, dr->bRequestType, |
1085 | le16_to_cpup(&dr->wIndex)); | |
1086 | if (ret) { | |
1da177e4 LT |
1087 | kfree(dr); |
1088 | return ret; | |
1089 | } | |
1da177e4 LT |
1090 | uurb->number_of_packets = 0; |
1091 | uurb->buffer_length = le16_to_cpup(&dr->wLength); | |
1092 | uurb->buffer += 8; | |
93cf9b90 AS |
1093 | if ((dr->bRequestType & USB_DIR_IN) && uurb->buffer_length) { |
1094 | is_in = 1; | |
1095 | uurb->endpoint |= USB_DIR_IN; | |
1096 | } else { | |
1097 | is_in = 0; | |
1098 | uurb->endpoint &= ~USB_DIR_IN; | |
1099 | } | |
1da177e4 LT |
1100 | break; |
1101 | ||
1102 | case USBDEVFS_URB_TYPE_BULK: | |
93cf9b90 | 1103 | switch (usb_endpoint_type(&ep->desc)) { |
1da177e4 LT |
1104 | case USB_ENDPOINT_XFER_CONTROL: |
1105 | case USB_ENDPOINT_XFER_ISOC: | |
1106 | return -EINVAL; | |
1107 | /* allow single-shot interrupt transfers, at bogus rates */ | |
1108 | } | |
1109 | uurb->number_of_packets = 0; | |
1110 | if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE) | |
1111 | return -EINVAL; | |
1da177e4 LT |
1112 | break; |
1113 | ||
1114 | case USBDEVFS_URB_TYPE_ISO: | |
1115 | /* arbitrary limit */ | |
04e482ff GKH |
1116 | if (uurb->number_of_packets < 1 || |
1117 | uurb->number_of_packets > 128) | |
1da177e4 | 1118 | return -EINVAL; |
93cf9b90 | 1119 | if (!usb_endpoint_xfer_isoc(&ep->desc)) |
1da177e4 | 1120 | return -EINVAL; |
04e482ff GKH |
1121 | isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * |
1122 | uurb->number_of_packets; | |
1da177e4 LT |
1123 | if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL))) |
1124 | return -ENOMEM; | |
1125 | if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) { | |
1126 | kfree(isopkt); | |
1127 | return -EFAULT; | |
1128 | } | |
1129 | for (totlen = u = 0; u < uurb->number_of_packets; u++) { | |
04e482ff GKH |
1130 | /* arbitrary limit, |
1131 | * sufficient for USB 2.0 high-bandwidth iso */ | |
3612242e | 1132 | if (isopkt[u].length > 8192) { |
1da177e4 LT |
1133 | kfree(isopkt); |
1134 | return -EINVAL; | |
1135 | } | |
1136 | totlen += isopkt[u].length; | |
1137 | } | |
5971897f MR |
1138 | /* 3072 * 64 microframes */ |
1139 | if (totlen > 196608) { | |
1da177e4 LT |
1140 | kfree(isopkt); |
1141 | return -EINVAL; | |
1142 | } | |
1143 | uurb->buffer_length = totlen; | |
1144 | break; | |
1145 | ||
1146 | case USBDEVFS_URB_TYPE_INTERRUPT: | |
1147 | uurb->number_of_packets = 0; | |
93cf9b90 | 1148 | if (!usb_endpoint_xfer_int(&ep->desc)) |
1da177e4 | 1149 | return -EINVAL; |
1da177e4 LT |
1150 | if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE) |
1151 | return -EINVAL; | |
1da177e4 LT |
1152 | break; |
1153 | ||
1154 | default: | |
1155 | return -EINVAL; | |
1156 | } | |
9180135b AS |
1157 | if (uurb->buffer_length > 0 && |
1158 | !access_ok(is_in ? VERIFY_WRITE : VERIFY_READ, | |
1159 | uurb->buffer, uurb->buffer_length)) { | |
6fd19f4b JJ |
1160 | kfree(isopkt); |
1161 | kfree(dr); | |
9180135b | 1162 | return -EFAULT; |
1da177e4 | 1163 | } |
9180135b AS |
1164 | as = alloc_async(uurb->number_of_packets); |
1165 | if (!as) { | |
6fd19f4b JJ |
1166 | kfree(isopkt); |
1167 | kfree(dr); | |
1da177e4 LT |
1168 | return -ENOMEM; |
1169 | } | |
9180135b AS |
1170 | if (uurb->buffer_length > 0) { |
1171 | as->urb->transfer_buffer = kmalloc(uurb->buffer_length, | |
1172 | GFP_KERNEL); | |
1173 | if (!as->urb->transfer_buffer) { | |
1174 | kfree(isopkt); | |
1175 | kfree(dr); | |
1176 | free_async(as); | |
1177 | return -ENOMEM; | |
1178 | } | |
1179 | } | |
04e482ff GKH |
1180 | as->urb->dev = ps->dev; |
1181 | as->urb->pipe = (uurb->type << 30) | | |
93cf9b90 AS |
1182 | __create_pipe(ps->dev, uurb->endpoint & 0xf) | |
1183 | (uurb->endpoint & USB_DIR_IN); | |
14722ef4 AS |
1184 | |
1185 | /* This tedious sequence is necessary because the URB_* flags | |
1186 | * are internal to the kernel and subject to change, whereas | |
1187 | * the USBDEVFS_URB_* flags are a user API and must not be changed. | |
1188 | */ | |
1189 | u = (is_in ? URB_DIR_IN : URB_DIR_OUT); | |
1190 | if (uurb->flags & USBDEVFS_URB_ISO_ASAP) | |
1191 | u |= URB_ISO_ASAP; | |
1192 | if (uurb->flags & USBDEVFS_URB_SHORT_NOT_OK) | |
1193 | u |= URB_SHORT_NOT_OK; | |
1194 | if (uurb->flags & USBDEVFS_URB_NO_FSBR) | |
1195 | u |= URB_NO_FSBR; | |
1196 | if (uurb->flags & USBDEVFS_URB_ZERO_PACKET) | |
1197 | u |= URB_ZERO_PACKET; | |
1198 | if (uurb->flags & USBDEVFS_URB_NO_INTERRUPT) | |
1199 | u |= URB_NO_INTERRUPT; | |
1200 | as->urb->transfer_flags = u; | |
1201 | ||
1da177e4 | 1202 | as->urb->transfer_buffer_length = uurb->buffer_length; |
04e482ff | 1203 | as->urb->setup_packet = (unsigned char *)dr; |
1da177e4 LT |
1204 | as->urb->start_frame = uurb->start_frame; |
1205 | as->urb->number_of_packets = uurb->number_of_packets; | |
97b9eb91 AS |
1206 | if (uurb->type == USBDEVFS_URB_TYPE_ISO || |
1207 | ps->dev->speed == USB_SPEED_HIGH) | |
1208 | as->urb->interval = 1 << min(15, ep->desc.bInterval - 1); | |
1209 | else | |
1210 | as->urb->interval = ep->desc.bInterval; | |
04e482ff GKH |
1211 | as->urb->context = as; |
1212 | as->urb->complete = async_completed; | |
1da177e4 LT |
1213 | for (totlen = u = 0; u < uurb->number_of_packets; u++) { |
1214 | as->urb->iso_frame_desc[u].offset = totlen; | |
1215 | as->urb->iso_frame_desc[u].length = isopkt[u].length; | |
1216 | totlen += isopkt[u].length; | |
1217 | } | |
6fd19f4b | 1218 | kfree(isopkt); |
1da177e4 | 1219 | as->ps = ps; |
04e482ff | 1220 | as->userurb = arg; |
9180135b | 1221 | if (is_in && uurb->buffer_length > 0) |
1da177e4 LT |
1222 | as->userbuffer = uurb->buffer; |
1223 | else | |
1224 | as->userbuffer = NULL; | |
1225 | as->signr = uurb->signr; | |
1226 | as->ifnum = ifnum; | |
2425c08b | 1227 | as->pid = get_pid(task_pid(current)); |
86a264ab DH |
1228 | as->uid = cred->uid; |
1229 | as->euid = cred->euid; | |
7a01955f | 1230 | security_task_getsecid(current, &as->secid); |
9180135b | 1231 | if (!is_in && uurb->buffer_length > 0) { |
93cf9b90 | 1232 | if (copy_from_user(as->urb->transfer_buffer, uurb->buffer, |
9180135b | 1233 | uurb->buffer_length)) { |
1da177e4 LT |
1234 | free_async(as); |
1235 | return -EFAULT; | |
1236 | } | |
1237 | } | |
4c6e8971 AS |
1238 | snoop_urb(ps->dev, as->userurb, as->urb->pipe, |
1239 | as->urb->transfer_buffer_length, 0, SUBMIT); | |
04e482ff | 1240 | async_newpending(as); |
01c6460f AS |
1241 | |
1242 | if (usb_endpoint_xfer_bulk(&ep->desc)) { | |
1243 | spin_lock_irq(&ps->lock); | |
1244 | ||
1245 | /* Not exactly the endpoint address; the direction bit is | |
1246 | * shifted to the 0x10 position so that the value will be | |
1247 | * between 0 and 31. | |
1248 | */ | |
1249 | as->bulk_addr = usb_endpoint_num(&ep->desc) | | |
1250 | ((ep->desc.bEndpointAddress & USB_ENDPOINT_DIR_MASK) | |
1251 | >> 3); | |
1252 | ||
1253 | /* If this bulk URB is the start of a new transfer, re-enable | |
1254 | * the endpoint. Otherwise mark it as a continuation URB. | |
1255 | */ | |
1256 | if (uurb->flags & USBDEVFS_URB_BULK_CONTINUATION) | |
1257 | as->bulk_status = AS_CONTINUATION; | |
1258 | else | |
1259 | ps->disabled_bulk_eps &= ~(1 << as->bulk_addr); | |
1260 | ||
1261 | /* Don't accept continuation URBs if the endpoint is | |
1262 | * disabled because of an earlier error. | |
1263 | */ | |
1264 | if (ps->disabled_bulk_eps & (1 << as->bulk_addr)) | |
1265 | ret = -EREMOTEIO; | |
1266 | else | |
1267 | ret = usb_submit_urb(as->urb, GFP_ATOMIC); | |
1268 | spin_unlock_irq(&ps->lock); | |
1269 | } else { | |
1270 | ret = usb_submit_urb(as->urb, GFP_KERNEL); | |
1271 | } | |
1272 | ||
1273 | if (ret) { | |
04e482ff GKH |
1274 | dev_printk(KERN_DEBUG, &ps->dev->dev, |
1275 | "usbfs: usb_submit_urb returned %d\n", ret); | |
4c6e8971 AS |
1276 | snoop_urb(ps->dev, as->userurb, as->urb->pipe, |
1277 | 0, ret, COMPLETE); | |
04e482ff GKH |
1278 | async_removepending(as); |
1279 | free_async(as); | |
1280 | return ret; | |
1281 | } | |
1282 | return 0; | |
1da177e4 LT |
1283 | } |
1284 | ||
1285 | static int proc_submiturb(struct dev_state *ps, void __user *arg) | |
1286 | { | |
1287 | struct usbdevfs_urb uurb; | |
1288 | ||
1289 | if (copy_from_user(&uurb, arg, sizeof(uurb))) | |
1290 | return -EFAULT; | |
1291 | ||
04e482ff GKH |
1292 | return proc_do_submiturb(ps, &uurb, |
1293 | (((struct usbdevfs_urb __user *)arg)->iso_frame_desc), | |
1294 | arg); | |
1da177e4 LT |
1295 | } |
1296 | ||
1297 | static int proc_unlinkurb(struct dev_state *ps, void __user *arg) | |
1298 | { | |
1299 | struct async *as; | |
1300 | ||
1301 | as = async_getpending(ps, arg); | |
1302 | if (!as) | |
1303 | return -EINVAL; | |
1304 | usb_kill_urb(as->urb); | |
1305 | return 0; | |
1306 | } | |
1307 | ||
1308 | static int processcompl(struct async *as, void __user * __user *arg) | |
1309 | { | |
1310 | struct urb *urb = as->urb; | |
1311 | struct usbdevfs_urb __user *userurb = as->userurb; | |
1312 | void __user *addr = as->userurb; | |
1313 | unsigned int i; | |
1314 | ||
d4a4683c | 1315 | if (as->userbuffer && urb->actual_length) |
04e482ff | 1316 | if (copy_to_user(as->userbuffer, urb->transfer_buffer, |
d4a4683c | 1317 | urb->actual_length)) |
d794a021 | 1318 | goto err_out; |
e015268d | 1319 | if (put_user(as->status, &userurb->status)) |
d794a021 | 1320 | goto err_out; |
1da177e4 | 1321 | if (put_user(urb->actual_length, &userurb->actual_length)) |
d794a021 | 1322 | goto err_out; |
1da177e4 | 1323 | if (put_user(urb->error_count, &userurb->error_count)) |
d794a021 | 1324 | goto err_out; |
1da177e4 | 1325 | |
93cf9b90 | 1326 | if (usb_endpoint_xfer_isoc(&urb->ep->desc)) { |
668a9541 CL |
1327 | for (i = 0; i < urb->number_of_packets; i++) { |
1328 | if (put_user(urb->iso_frame_desc[i].actual_length, | |
1329 | &userurb->iso_frame_desc[i].actual_length)) | |
d794a021 | 1330 | goto err_out; |
668a9541 CL |
1331 | if (put_user(urb->iso_frame_desc[i].status, |
1332 | &userurb->iso_frame_desc[i].status)) | |
d794a021 | 1333 | goto err_out; |
668a9541 | 1334 | } |
1da177e4 LT |
1335 | } |
1336 | ||
1da177e4 LT |
1337 | if (put_user(addr, (void __user * __user *)arg)) |
1338 | return -EFAULT; | |
1339 | return 0; | |
d794a021 ON |
1340 | |
1341 | err_out: | |
d794a021 | 1342 | return -EFAULT; |
1da177e4 LT |
1343 | } |
1344 | ||
04e482ff | 1345 | static struct async *reap_as(struct dev_state *ps) |
1da177e4 | 1346 | { |
04e482ff | 1347 | DECLARE_WAITQUEUE(wait, current); |
1da177e4 LT |
1348 | struct async *as = NULL; |
1349 | struct usb_device *dev = ps->dev; | |
1350 | ||
1351 | add_wait_queue(&ps->wait, &wait); | |
1352 | for (;;) { | |
1353 | __set_current_state(TASK_INTERRUPTIBLE); | |
04e482ff GKH |
1354 | as = async_getcompleted(ps); |
1355 | if (as) | |
1da177e4 LT |
1356 | break; |
1357 | if (signal_pending(current)) | |
1358 | break; | |
1359 | usb_unlock_device(dev); | |
1360 | schedule(); | |
1361 | usb_lock_device(dev); | |
1362 | } | |
1363 | remove_wait_queue(&ps->wait, &wait); | |
1364 | set_current_state(TASK_RUNNING); | |
1365 | return as; | |
1366 | } | |
1367 | ||
1368 | static int proc_reapurb(struct dev_state *ps, void __user *arg) | |
1369 | { | |
1370 | struct async *as = reap_as(ps); | |
ddeee0b2 LT |
1371 | if (as) { |
1372 | int retval = processcompl(as, (void __user * __user *)arg); | |
1373 | free_async(as); | |
1374 | return retval; | |
1375 | } | |
1da177e4 LT |
1376 | if (signal_pending(current)) |
1377 | return -EINTR; | |
1378 | return -EIO; | |
1379 | } | |
1380 | ||
1381 | static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg) | |
1382 | { | |
ddeee0b2 | 1383 | int retval; |
1da177e4 LT |
1384 | struct async *as; |
1385 | ||
ddeee0b2 LT |
1386 | as = async_getcompleted(ps); |
1387 | retval = -EAGAIN; | |
1388 | if (as) { | |
1389 | retval = processcompl(as, (void __user * __user *)arg); | |
1390 | free_async(as); | |
1391 | } | |
1392 | return retval; | |
1da177e4 LT |
1393 | } |
1394 | ||
1395 | #ifdef CONFIG_COMPAT | |
637e8a60 AB |
1396 | static int proc_control_compat(struct dev_state *ps, |
1397 | struct usbdevfs_ctrltransfer32 __user *p32) | |
1398 | { | |
1399 | struct usbdevfs_ctrltransfer __user *p; | |
1400 | __u32 udata; | |
1401 | p = compat_alloc_user_space(sizeof(*p)); | |
1402 | if (copy_in_user(p, p32, (sizeof(*p32) - sizeof(compat_caddr_t))) || | |
1403 | get_user(udata, &p32->data) || | |
1404 | put_user(compat_ptr(udata), &p->data)) | |
1405 | return -EFAULT; | |
1406 | return proc_control(ps, p); | |
1407 | } | |
1408 | ||
1409 | static int proc_bulk_compat(struct dev_state *ps, | |
1410 | struct usbdevfs_bulktransfer32 __user *p32) | |
1411 | { | |
1412 | struct usbdevfs_bulktransfer __user *p; | |
1413 | compat_uint_t n; | |
1414 | compat_caddr_t addr; | |
1415 | ||
1416 | p = compat_alloc_user_space(sizeof(*p)); | |
1417 | ||
1418 | if (get_user(n, &p32->ep) || put_user(n, &p->ep) || | |
1419 | get_user(n, &p32->len) || put_user(n, &p->len) || | |
1420 | get_user(n, &p32->timeout) || put_user(n, &p->timeout) || | |
1421 | get_user(addr, &p32->data) || put_user(compat_ptr(addr), &p->data)) | |
1422 | return -EFAULT; | |
1423 | ||
1424 | return proc_bulk(ps, p); | |
1425 | } | |
1426 | static int proc_disconnectsignal_compat(struct dev_state *ps, void __user *arg) | |
1427 | { | |
1428 | struct usbdevfs_disconnectsignal32 ds; | |
1429 | ||
1430 | if (copy_from_user(&ds, arg, sizeof(ds))) | |
1431 | return -EFAULT; | |
1432 | ps->discsignr = ds.signr; | |
1433 | ps->disccontext = compat_ptr(ds.context); | |
1434 | return 0; | |
1435 | } | |
1da177e4 LT |
1436 | |
1437 | static int get_urb32(struct usbdevfs_urb *kurb, | |
1438 | struct usbdevfs_urb32 __user *uurb) | |
1439 | { | |
1440 | __u32 uptr; | |
18753ebc MB |
1441 | if (!access_ok(VERIFY_READ, uurb, sizeof(*uurb)) || |
1442 | __get_user(kurb->type, &uurb->type) || | |
1da177e4 LT |
1443 | __get_user(kurb->endpoint, &uurb->endpoint) || |
1444 | __get_user(kurb->status, &uurb->status) || | |
1445 | __get_user(kurb->flags, &uurb->flags) || | |
1446 | __get_user(kurb->buffer_length, &uurb->buffer_length) || | |
1447 | __get_user(kurb->actual_length, &uurb->actual_length) || | |
1448 | __get_user(kurb->start_frame, &uurb->start_frame) || | |
1449 | __get_user(kurb->number_of_packets, &uurb->number_of_packets) || | |
1450 | __get_user(kurb->error_count, &uurb->error_count) || | |
1451 | __get_user(kurb->signr, &uurb->signr)) | |
1452 | return -EFAULT; | |
1453 | ||
1454 | if (__get_user(uptr, &uurb->buffer)) | |
1455 | return -EFAULT; | |
1456 | kurb->buffer = compat_ptr(uptr); | |
ed0c7720 | 1457 | if (__get_user(uptr, &uurb->usercontext)) |
1da177e4 LT |
1458 | return -EFAULT; |
1459 | kurb->usercontext = compat_ptr(uptr); | |
1460 | ||
1461 | return 0; | |
1462 | } | |
1463 | ||
1464 | static int proc_submiturb_compat(struct dev_state *ps, void __user *arg) | |
1465 | { | |
1466 | struct usbdevfs_urb uurb; | |
1467 | ||
04e482ff | 1468 | if (get_urb32(&uurb, (struct usbdevfs_urb32 __user *)arg)) |
1da177e4 LT |
1469 | return -EFAULT; |
1470 | ||
04e482ff GKH |
1471 | return proc_do_submiturb(ps, &uurb, |
1472 | ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc, | |
1473 | arg); | |
1da177e4 LT |
1474 | } |
1475 | ||
1476 | static int processcompl_compat(struct async *as, void __user * __user *arg) | |
1477 | { | |
1478 | struct urb *urb = as->urb; | |
1479 | struct usbdevfs_urb32 __user *userurb = as->userurb; | |
1480 | void __user *addr = as->userurb; | |
1481 | unsigned int i; | |
1482 | ||
d4a4683c | 1483 | if (as->userbuffer && urb->actual_length) |
04e482ff | 1484 | if (copy_to_user(as->userbuffer, urb->transfer_buffer, |
d4a4683c | 1485 | urb->actual_length)) |
1da177e4 | 1486 | return -EFAULT; |
e015268d | 1487 | if (put_user(as->status, &userurb->status)) |
1da177e4 LT |
1488 | return -EFAULT; |
1489 | if (put_user(urb->actual_length, &userurb->actual_length)) | |
1490 | return -EFAULT; | |
1491 | if (put_user(urb->error_count, &userurb->error_count)) | |
1492 | return -EFAULT; | |
1493 | ||
93cf9b90 | 1494 | if (usb_endpoint_xfer_isoc(&urb->ep->desc)) { |
668a9541 CL |
1495 | for (i = 0; i < urb->number_of_packets; i++) { |
1496 | if (put_user(urb->iso_frame_desc[i].actual_length, | |
1497 | &userurb->iso_frame_desc[i].actual_length)) | |
1498 | return -EFAULT; | |
1499 | if (put_user(urb->iso_frame_desc[i].status, | |
1500 | &userurb->iso_frame_desc[i].status)) | |
1501 | return -EFAULT; | |
1502 | } | |
1da177e4 LT |
1503 | } |
1504 | ||
c714de5d | 1505 | if (put_user(ptr_to_compat(addr), (u32 __user *)arg)) |
1da177e4 LT |
1506 | return -EFAULT; |
1507 | return 0; | |
1508 | } | |
1509 | ||
1510 | static int proc_reapurb_compat(struct dev_state *ps, void __user *arg) | |
1511 | { | |
1512 | struct async *as = reap_as(ps); | |
ddeee0b2 LT |
1513 | if (as) { |
1514 | int retval = processcompl_compat(as, (void __user * __user *)arg); | |
1515 | free_async(as); | |
1516 | return retval; | |
1517 | } | |
1da177e4 LT |
1518 | if (signal_pending(current)) |
1519 | return -EINTR; | |
1520 | return -EIO; | |
1521 | } | |
1522 | ||
1523 | static int proc_reapurbnonblock_compat(struct dev_state *ps, void __user *arg) | |
1524 | { | |
ddeee0b2 | 1525 | int retval; |
1da177e4 LT |
1526 | struct async *as; |
1527 | ||
ddeee0b2 LT |
1528 | retval = -EAGAIN; |
1529 | as = async_getcompleted(ps); | |
1530 | if (as) { | |
1531 | retval = processcompl_compat(as, (void __user * __user *)arg); | |
1532 | free_async(as); | |
1533 | } | |
1534 | return retval; | |
1da177e4 LT |
1535 | } |
1536 | ||
637e8a60 | 1537 | |
1da177e4 LT |
1538 | #endif |
1539 | ||
1540 | static int proc_disconnectsignal(struct dev_state *ps, void __user *arg) | |
1541 | { | |
1542 | struct usbdevfs_disconnectsignal ds; | |
1543 | ||
1544 | if (copy_from_user(&ds, arg, sizeof(ds))) | |
1545 | return -EFAULT; | |
1da177e4 LT |
1546 | ps->discsignr = ds.signr; |
1547 | ps->disccontext = ds.context; | |
1548 | return 0; | |
1549 | } | |
1550 | ||
1551 | static int proc_claiminterface(struct dev_state *ps, void __user *arg) | |
1552 | { | |
1553 | unsigned int ifnum; | |
1554 | ||
1555 | if (get_user(ifnum, (unsigned int __user *)arg)) | |
1556 | return -EFAULT; | |
1557 | return claimintf(ps, ifnum); | |
1558 | } | |
1559 | ||
1560 | static int proc_releaseinterface(struct dev_state *ps, void __user *arg) | |
1561 | { | |
1562 | unsigned int ifnum; | |
1563 | int ret; | |
1564 | ||
1565 | if (get_user(ifnum, (unsigned int __user *)arg)) | |
1566 | return -EFAULT; | |
1567 | if ((ret = releaseintf(ps, ifnum)) < 0) | |
1568 | return ret; | |
1569 | destroy_async_on_interface (ps, ifnum); | |
1570 | return 0; | |
1571 | } | |
1572 | ||
c36fc889 | 1573 | static int proc_ioctl(struct dev_state *ps, struct usbdevfs_ioctl *ctl) |
1da177e4 | 1574 | { |
1da177e4 LT |
1575 | int size; |
1576 | void *buf = NULL; | |
1577 | int retval = 0; | |
1578 | struct usb_interface *intf = NULL; | |
1579 | struct usb_driver *driver = NULL; | |
1da177e4 | 1580 | |
c36fc889 | 1581 | /* alloc buffer */ |
04e482ff GKH |
1582 | if ((size = _IOC_SIZE(ctl->ioctl_code)) > 0) { |
1583 | if ((buf = kmalloc(size, GFP_KERNEL)) == NULL) | |
1da177e4 | 1584 | return -ENOMEM; |
c36fc889 | 1585 | if ((_IOC_DIR(ctl->ioctl_code) & _IOC_WRITE)) { |
04e482ff | 1586 | if (copy_from_user(buf, ctl->data, size)) { |
6fd19f4b | 1587 | kfree(buf); |
1da177e4 LT |
1588 | return -EFAULT; |
1589 | } | |
1590 | } else { | |
04e482ff | 1591 | memset(buf, 0, size); |
1da177e4 LT |
1592 | } |
1593 | } | |
1594 | ||
349710c3 | 1595 | if (!connected(ps)) { |
6fd19f4b | 1596 | kfree(buf); |
1da177e4 LT |
1597 | return -ENODEV; |
1598 | } | |
1599 | ||
1600 | if (ps->dev->state != USB_STATE_CONFIGURED) | |
1601 | retval = -EHOSTUNREACH; | |
04e482ff GKH |
1602 | else if (!(intf = usb_ifnum_to_if(ps->dev, ctl->ifno))) |
1603 | retval = -EINVAL; | |
c36fc889 | 1604 | else switch (ctl->ioctl_code) { |
1da177e4 LT |
1605 | |
1606 | /* disconnect kernel driver from interface */ | |
1607 | case USBDEVFS_DISCONNECT: | |
1da177e4 LT |
1608 | if (intf->dev.driver) { |
1609 | driver = to_usb_driver(intf->dev.driver); | |
04e482ff | 1610 | dev_dbg(&intf->dev, "disconnect by usbfs\n"); |
1da177e4 LT |
1611 | usb_driver_release_interface(driver, intf); |
1612 | } else | |
1613 | retval = -ENODATA; | |
1da177e4 LT |
1614 | break; |
1615 | ||
1616 | /* let kernel drivers try to (re)bind to the interface */ | |
1617 | case USBDEVFS_CONNECT: | |
885e9747 AS |
1618 | if (!intf->dev.driver) |
1619 | retval = device_attach(&intf->dev); | |
1620 | else | |
1621 | retval = -EBUSY; | |
1da177e4 LT |
1622 | break; |
1623 | ||
1624 | /* talk directly to the interface's driver */ | |
1625 | default: | |
1da177e4 LT |
1626 | if (intf->dev.driver) |
1627 | driver = to_usb_driver(intf->dev.driver); | |
1628 | if (driver == NULL || driver->ioctl == NULL) { | |
1629 | retval = -ENOTTY; | |
1630 | } else { | |
04e482ff | 1631 | retval = driver->ioctl(intf, ctl->ioctl_code, buf); |
1da177e4 LT |
1632 | if (retval == -ENOIOCTLCMD) |
1633 | retval = -ENOTTY; | |
1634 | } | |
1da177e4 LT |
1635 | } |
1636 | ||
1637 | /* cleanup and return */ | |
1638 | if (retval >= 0 | |
04e482ff | 1639 | && (_IOC_DIR(ctl->ioctl_code) & _IOC_READ) != 0 |
1da177e4 | 1640 | && size > 0 |
04e482ff | 1641 | && copy_to_user(ctl->data, buf, size) != 0) |
1da177e4 | 1642 | retval = -EFAULT; |
6fd19f4b JJ |
1643 | |
1644 | kfree(buf); | |
1da177e4 LT |
1645 | return retval; |
1646 | } | |
1647 | ||
c36fc889 PZ |
1648 | static int proc_ioctl_default(struct dev_state *ps, void __user *arg) |
1649 | { | |
1650 | struct usbdevfs_ioctl ctrl; | |
1651 | ||
04e482ff | 1652 | if (copy_from_user(&ctrl, arg, sizeof(ctrl))) |
c36fc889 PZ |
1653 | return -EFAULT; |
1654 | return proc_ioctl(ps, &ctrl); | |
1655 | } | |
1656 | ||
1657 | #ifdef CONFIG_COMPAT | |
777da590 | 1658 | static int proc_ioctl_compat(struct dev_state *ps, compat_uptr_t arg) |
c36fc889 PZ |
1659 | { |
1660 | struct usbdevfs_ioctl32 __user *uioc; | |
1661 | struct usbdevfs_ioctl ctrl; | |
1662 | u32 udata; | |
1663 | ||
058120d7 | 1664 | uioc = compat_ptr((long)arg); |
18753ebc MB |
1665 | if (!access_ok(VERIFY_READ, uioc, sizeof(*uioc)) || |
1666 | __get_user(ctrl.ifno, &uioc->ifno) || | |
1667 | __get_user(ctrl.ioctl_code, &uioc->ioctl_code) || | |
c36fc889 PZ |
1668 | __get_user(udata, &uioc->data)) |
1669 | return -EFAULT; | |
1670 | ctrl.data = compat_ptr(udata); | |
1671 | ||
1672 | return proc_ioctl(ps, &ctrl); | |
1673 | } | |
1674 | #endif | |
1675 | ||
7cbe5dca AS |
1676 | static int proc_claim_port(struct dev_state *ps, void __user *arg) |
1677 | { | |
1678 | unsigned portnum; | |
1679 | int rc; | |
1680 | ||
1681 | if (get_user(portnum, (unsigned __user *) arg)) | |
1682 | return -EFAULT; | |
1683 | rc = usb_hub_claim_port(ps->dev, portnum, ps); | |
1684 | if (rc == 0) | |
1685 | snoop(&ps->dev->dev, "port %d claimed by process %d: %s\n", | |
1686 | portnum, task_pid_nr(current), current->comm); | |
1687 | return rc; | |
1688 | } | |
1689 | ||
1690 | static int proc_release_port(struct dev_state *ps, void __user *arg) | |
1691 | { | |
1692 | unsigned portnum; | |
1693 | ||
1694 | if (get_user(portnum, (unsigned __user *) arg)) | |
1695 | return -EFAULT; | |
1696 | return usb_hub_release_port(ps->dev, portnum, ps); | |
1697 | } | |
1698 | ||
1da177e4 LT |
1699 | /* |
1700 | * NOTE: All requests here that have interface numbers as parameters | |
1701 | * are assuming that somehow the configuration has been prevented from | |
1702 | * changing. But there's no mechanism to ensure that... | |
1703 | */ | |
637e8a60 AB |
1704 | static long usbdev_do_ioctl(struct file *file, unsigned int cmd, |
1705 | void __user *p) | |
1da177e4 | 1706 | { |
ec17cf1c | 1707 | struct dev_state *ps = file->private_data; |
637e8a60 | 1708 | struct inode *inode = file->f_path.dentry->d_inode; |
1da177e4 | 1709 | struct usb_device *dev = ps->dev; |
1da177e4 LT |
1710 | int ret = -ENOTTY; |
1711 | ||
1712 | if (!(file->f_mode & FMODE_WRITE)) | |
1713 | return -EPERM; | |
1714 | usb_lock_device(dev); | |
349710c3 | 1715 | if (!connected(ps)) { |
1da177e4 LT |
1716 | usb_unlock_device(dev); |
1717 | return -ENODEV; | |
1718 | } | |
1719 | ||
1720 | switch (cmd) { | |
1721 | case USBDEVFS_CONTROL: | |
441b62c1 | 1722 | snoop(&dev->dev, "%s: CONTROL\n", __func__); |
1da177e4 LT |
1723 | ret = proc_control(ps, p); |
1724 | if (ret >= 0) | |
1725 | inode->i_mtime = CURRENT_TIME; | |
1726 | break; | |
1727 | ||
1728 | case USBDEVFS_BULK: | |
441b62c1 | 1729 | snoop(&dev->dev, "%s: BULK\n", __func__); |
1da177e4 LT |
1730 | ret = proc_bulk(ps, p); |
1731 | if (ret >= 0) | |
1732 | inode->i_mtime = CURRENT_TIME; | |
1733 | break; | |
1734 | ||
1735 | case USBDEVFS_RESETEP: | |
441b62c1 | 1736 | snoop(&dev->dev, "%s: RESETEP\n", __func__); |
1da177e4 LT |
1737 | ret = proc_resetep(ps, p); |
1738 | if (ret >= 0) | |
1739 | inode->i_mtime = CURRENT_TIME; | |
1740 | break; | |
1741 | ||
1742 | case USBDEVFS_RESET: | |
441b62c1 | 1743 | snoop(&dev->dev, "%s: RESET\n", __func__); |
1da177e4 LT |
1744 | ret = proc_resetdevice(ps); |
1745 | break; | |
1746 | ||
1747 | case USBDEVFS_CLEAR_HALT: | |
441b62c1 | 1748 | snoop(&dev->dev, "%s: CLEAR_HALT\n", __func__); |
1da177e4 LT |
1749 | ret = proc_clearhalt(ps, p); |
1750 | if (ret >= 0) | |
1751 | inode->i_mtime = CURRENT_TIME; | |
1752 | break; | |
1753 | ||
1754 | case USBDEVFS_GETDRIVER: | |
441b62c1 | 1755 | snoop(&dev->dev, "%s: GETDRIVER\n", __func__); |
1da177e4 LT |
1756 | ret = proc_getdriver(ps, p); |
1757 | break; | |
1758 | ||
1759 | case USBDEVFS_CONNECTINFO: | |
441b62c1 | 1760 | snoop(&dev->dev, "%s: CONNECTINFO\n", __func__); |
1da177e4 LT |
1761 | ret = proc_connectinfo(ps, p); |
1762 | break; | |
1763 | ||
1764 | case USBDEVFS_SETINTERFACE: | |
441b62c1 | 1765 | snoop(&dev->dev, "%s: SETINTERFACE\n", __func__); |
1da177e4 LT |
1766 | ret = proc_setintf(ps, p); |
1767 | break; | |
1768 | ||
1769 | case USBDEVFS_SETCONFIGURATION: | |
441b62c1 | 1770 | snoop(&dev->dev, "%s: SETCONFIGURATION\n", __func__); |
1da177e4 LT |
1771 | ret = proc_setconfig(ps, p); |
1772 | break; | |
1773 | ||
1774 | case USBDEVFS_SUBMITURB: | |
441b62c1 | 1775 | snoop(&dev->dev, "%s: SUBMITURB\n", __func__); |
1da177e4 LT |
1776 | ret = proc_submiturb(ps, p); |
1777 | if (ret >= 0) | |
1778 | inode->i_mtime = CURRENT_TIME; | |
1779 | break; | |
1780 | ||
1781 | #ifdef CONFIG_COMPAT | |
637e8a60 AB |
1782 | case USBDEVFS_CONTROL32: |
1783 | snoop(&dev->dev, "%s: CONTROL32\n", __func__); | |
1784 | ret = proc_control_compat(ps, p); | |
1785 | if (ret >= 0) | |
1786 | inode->i_mtime = CURRENT_TIME; | |
1787 | break; | |
1788 | ||
1789 | case USBDEVFS_BULK32: | |
1790 | snoop(&dev->dev, "%s: BULK32\n", __func__); | |
1791 | ret = proc_bulk_compat(ps, p); | |
1792 | if (ret >= 0) | |
1793 | inode->i_mtime = CURRENT_TIME; | |
1794 | break; | |
1795 | ||
1796 | case USBDEVFS_DISCSIGNAL32: | |
1797 | snoop(&dev->dev, "%s: DISCSIGNAL32\n", __func__); | |
1798 | ret = proc_disconnectsignal_compat(ps, p); | |
1799 | break; | |
1da177e4 LT |
1800 | |
1801 | case USBDEVFS_SUBMITURB32: | |
441b62c1 | 1802 | snoop(&dev->dev, "%s: SUBMITURB32\n", __func__); |
1da177e4 LT |
1803 | ret = proc_submiturb_compat(ps, p); |
1804 | if (ret >= 0) | |
1805 | inode->i_mtime = CURRENT_TIME; | |
1806 | break; | |
1807 | ||
1808 | case USBDEVFS_REAPURB32: | |
441b62c1 | 1809 | snoop(&dev->dev, "%s: REAPURB32\n", __func__); |
1da177e4 LT |
1810 | ret = proc_reapurb_compat(ps, p); |
1811 | break; | |
1812 | ||
1813 | case USBDEVFS_REAPURBNDELAY32: | |
4c6e8971 | 1814 | snoop(&dev->dev, "%s: REAPURBNDELAY32\n", __func__); |
1da177e4 LT |
1815 | ret = proc_reapurbnonblock_compat(ps, p); |
1816 | break; | |
1817 | ||
c36fc889 | 1818 | case USBDEVFS_IOCTL32: |
637e8a60 | 1819 | snoop(&dev->dev, "%s: IOCTL32\n", __func__); |
c714de5d | 1820 | ret = proc_ioctl_compat(ps, ptr_to_compat(p)); |
c36fc889 | 1821 | break; |
1da177e4 LT |
1822 | #endif |
1823 | ||
1824 | case USBDEVFS_DISCARDURB: | |
441b62c1 | 1825 | snoop(&dev->dev, "%s: DISCARDURB\n", __func__); |
1da177e4 LT |
1826 | ret = proc_unlinkurb(ps, p); |
1827 | break; | |
1828 | ||
1829 | case USBDEVFS_REAPURB: | |
441b62c1 | 1830 | snoop(&dev->dev, "%s: REAPURB\n", __func__); |
1da177e4 LT |
1831 | ret = proc_reapurb(ps, p); |
1832 | break; | |
1833 | ||
1834 | case USBDEVFS_REAPURBNDELAY: | |
4c6e8971 | 1835 | snoop(&dev->dev, "%s: REAPURBNDELAY\n", __func__); |
1da177e4 LT |
1836 | ret = proc_reapurbnonblock(ps, p); |
1837 | break; | |
1838 | ||
1839 | case USBDEVFS_DISCSIGNAL: | |
441b62c1 | 1840 | snoop(&dev->dev, "%s: DISCSIGNAL\n", __func__); |
1da177e4 LT |
1841 | ret = proc_disconnectsignal(ps, p); |
1842 | break; | |
1843 | ||
1844 | case USBDEVFS_CLAIMINTERFACE: | |
441b62c1 | 1845 | snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __func__); |
1da177e4 LT |
1846 | ret = proc_claiminterface(ps, p); |
1847 | break; | |
1848 | ||
1849 | case USBDEVFS_RELEASEINTERFACE: | |
441b62c1 | 1850 | snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __func__); |
1da177e4 LT |
1851 | ret = proc_releaseinterface(ps, p); |
1852 | break; | |
1853 | ||
1854 | case USBDEVFS_IOCTL: | |
441b62c1 | 1855 | snoop(&dev->dev, "%s: IOCTL\n", __func__); |
c36fc889 | 1856 | ret = proc_ioctl_default(ps, p); |
1da177e4 | 1857 | break; |
7cbe5dca AS |
1858 | |
1859 | case USBDEVFS_CLAIM_PORT: | |
1860 | snoop(&dev->dev, "%s: CLAIM_PORT\n", __func__); | |
1861 | ret = proc_claim_port(ps, p); | |
1862 | break; | |
1863 | ||
1864 | case USBDEVFS_RELEASE_PORT: | |
1865 | snoop(&dev->dev, "%s: RELEASE_PORT\n", __func__); | |
1866 | ret = proc_release_port(ps, p); | |
1867 | break; | |
1da177e4 LT |
1868 | } |
1869 | usb_unlock_device(dev); | |
1870 | if (ret >= 0) | |
1871 | inode->i_atime = CURRENT_TIME; | |
1872 | return ret; | |
1873 | } | |
1874 | ||
637e8a60 AB |
1875 | static long usbdev_ioctl(struct file *file, unsigned int cmd, |
1876 | unsigned long arg) | |
1877 | { | |
1878 | int ret; | |
1879 | ||
1880 | lock_kernel(); | |
1881 | ret = usbdev_do_ioctl(file, cmd, (void __user *)arg); | |
1882 | unlock_kernel(); | |
1883 | ||
1884 | return ret; | |
1885 | } | |
1886 | ||
1887 | #ifdef CONFIG_COMPAT | |
1888 | static long usbdev_compat_ioctl(struct file *file, unsigned int cmd, | |
1889 | unsigned long arg) | |
1890 | { | |
1891 | int ret; | |
1892 | ||
1893 | lock_kernel(); | |
1894 | ret = usbdev_do_ioctl(file, cmd, compat_ptr(arg)); | |
1895 | unlock_kernel(); | |
1896 | ||
1897 | return ret; | |
1898 | } | |
1899 | #endif | |
1900 | ||
1da177e4 | 1901 | /* No kernel lock - fine */ |
04e482ff GKH |
1902 | static unsigned int usbdev_poll(struct file *file, |
1903 | struct poll_table_struct *wait) | |
1da177e4 | 1904 | { |
ec17cf1c TK |
1905 | struct dev_state *ps = file->private_data; |
1906 | unsigned int mask = 0; | |
1da177e4 LT |
1907 | |
1908 | poll_wait(file, &ps->wait, wait); | |
1909 | if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed)) | |
1910 | mask |= POLLOUT | POLLWRNORM; | |
349710c3 | 1911 | if (!connected(ps)) |
1da177e4 LT |
1912 | mask |= POLLERR | POLLHUP; |
1913 | return mask; | |
1914 | } | |
1915 | ||
9f8b17e6 | 1916 | const struct file_operations usbdev_file_operations = { |
637e8a60 AB |
1917 | .owner = THIS_MODULE, |
1918 | .llseek = usbdev_lseek, | |
1919 | .read = usbdev_read, | |
1920 | .poll = usbdev_poll, | |
1921 | .unlocked_ioctl = usbdev_ioctl, | |
1922 | #ifdef CONFIG_COMPAT | |
1923 | .compat_ioctl = usbdev_compat_ioctl, | |
1924 | #endif | |
1925 | .open = usbdev_open, | |
1926 | .release = usbdev_release, | |
1da177e4 | 1927 | }; |
fbf82fd2 | 1928 | |
501950d8 | 1929 | static void usbdev_remove(struct usb_device *udev) |
cd9f0375 AS |
1930 | { |
1931 | struct dev_state *ps; | |
1932 | struct siginfo sinfo; | |
1933 | ||
1934 | while (!list_empty(&udev->filelist)) { | |
1935 | ps = list_entry(udev->filelist.next, struct dev_state, list); | |
1936 | destroy_all_async(ps); | |
1937 | wake_up_all(&ps->wait); | |
1938 | list_del_init(&ps->list); | |
1939 | if (ps->discsignr) { | |
1940 | sinfo.si_signo = ps->discsignr; | |
1941 | sinfo.si_errno = EPIPE; | |
1942 | sinfo.si_code = SI_ASYNCIO; | |
1943 | sinfo.si_addr = ps->disccontext; | |
1944 | kill_pid_info_as_uid(ps->discsignr, &sinfo, | |
1945 | ps->disc_pid, ps->disc_uid, | |
1946 | ps->disc_euid, ps->secid); | |
1947 | } | |
1948 | } | |
1949 | } | |
1950 | ||
9f8b17e6 KS |
1951 | #ifdef CONFIG_USB_DEVICE_CLASS |
1952 | static struct class *usb_classdev_class; | |
1953 | ||
1954 | static int usb_classdev_add(struct usb_device *dev) | |
fbf82fd2 | 1955 | { |
e04199b2 AS |
1956 | struct device *cldev; |
1957 | ||
b0b090e5 GKH |
1958 | cldev = device_create(usb_classdev_class, &dev->dev, dev->dev.devt, |
1959 | NULL, "usbdev%d.%d", dev->bus->busnum, | |
1960 | dev->devnum); | |
e04199b2 AS |
1961 | if (IS_ERR(cldev)) |
1962 | return PTR_ERR(cldev); | |
1963 | dev->usb_classdev = cldev; | |
27d39e26 | 1964 | return 0; |
fbf82fd2 KS |
1965 | } |
1966 | ||
9f8b17e6 | 1967 | static void usb_classdev_remove(struct usb_device *dev) |
fbf82fd2 | 1968 | { |
e04199b2 AS |
1969 | if (dev->usb_classdev) |
1970 | device_unregister(dev->usb_classdev); | |
fbf82fd2 KS |
1971 | } |
1972 | ||
501950d8 AS |
1973 | #else |
1974 | #define usb_classdev_add(dev) 0 | |
1975 | #define usb_classdev_remove(dev) do {} while (0) | |
1976 | ||
1977 | #endif | |
1978 | ||
1979 | static int usbdev_notify(struct notifier_block *self, | |
9f8b17e6 | 1980 | unsigned long action, void *dev) |
a7b986b3 GKH |
1981 | { |
1982 | switch (action) { | |
1983 | case USB_DEVICE_ADD: | |
9f8b17e6 | 1984 | if (usb_classdev_add(dev)) |
27d39e26 | 1985 | return NOTIFY_BAD; |
a7b986b3 GKH |
1986 | break; |
1987 | case USB_DEVICE_REMOVE: | |
9f8b17e6 | 1988 | usb_classdev_remove(dev); |
501950d8 | 1989 | usbdev_remove(dev); |
a7b986b3 GKH |
1990 | break; |
1991 | } | |
1992 | return NOTIFY_OK; | |
1993 | } | |
1994 | ||
1995 | static struct notifier_block usbdev_nb = { | |
501950d8 | 1996 | .notifier_call = usbdev_notify, |
a7b986b3 GKH |
1997 | }; |
1998 | ||
7e7654a9 | 1999 | static struct cdev usb_device_cdev; |
fbf82fd2 | 2000 | |
9f8b17e6 | 2001 | int __init usb_devio_init(void) |
fbf82fd2 KS |
2002 | { |
2003 | int retval; | |
2004 | ||
fad21bdf | 2005 | retval = register_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX, |
04e482ff | 2006 | "usb_device"); |
fbf82fd2 | 2007 | if (retval) { |
69a85942 | 2008 | printk(KERN_ERR "Unable to register minors for usb_device\n"); |
fbf82fd2 KS |
2009 | goto out; |
2010 | } | |
9f8b17e6 | 2011 | cdev_init(&usb_device_cdev, &usbdev_file_operations); |
fad21bdf | 2012 | retval = cdev_add(&usb_device_cdev, USB_DEVICE_DEV, USB_DEVICE_MAX); |
fbf82fd2 | 2013 | if (retval) { |
69a85942 GKH |
2014 | printk(KERN_ERR "Unable to get usb_device major %d\n", |
2015 | USB_DEVICE_MAJOR); | |
a7b986b3 | 2016 | goto error_cdev; |
fbf82fd2 | 2017 | } |
9f8b17e6 KS |
2018 | #ifdef CONFIG_USB_DEVICE_CLASS |
2019 | usb_classdev_class = class_create(THIS_MODULE, "usb_device"); | |
2020 | if (IS_ERR(usb_classdev_class)) { | |
69a85942 | 2021 | printk(KERN_ERR "Unable to register usb_device class\n"); |
9f8b17e6 KS |
2022 | retval = PTR_ERR(usb_classdev_class); |
2023 | cdev_del(&usb_device_cdev); | |
2024 | usb_classdev_class = NULL; | |
2025 | goto out; | |
fbf82fd2 | 2026 | } |
e105b8bf DW |
2027 | /* devices of this class shadow the major:minor of their parent |
2028 | * device, so clear ->dev_kobj to prevent adding duplicate entries | |
2029 | * to /sys/dev | |
2030 | */ | |
2031 | usb_classdev_class->dev_kobj = NULL; | |
9f8b17e6 | 2032 | #endif |
501950d8 | 2033 | usb_register_notify(&usbdev_nb); |
fbf82fd2 KS |
2034 | out: |
2035 | return retval; | |
a7b986b3 | 2036 | |
a7b986b3 GKH |
2037 | error_cdev: |
2038 | unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX); | |
2039 | goto out; | |
fbf82fd2 KS |
2040 | } |
2041 | ||
9f8b17e6 | 2042 | void usb_devio_cleanup(void) |
fbf82fd2 | 2043 | { |
a7b986b3 | 2044 | usb_unregister_notify(&usbdev_nb); |
501950d8 | 2045 | #ifdef CONFIG_USB_DEVICE_CLASS |
9f8b17e6 KS |
2046 | class_destroy(usb_classdev_class); |
2047 | #endif | |
fbf82fd2 | 2048 | cdev_del(&usb_device_cdev); |
fad21bdf | 2049 | unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX); |
fbf82fd2 | 2050 | } |