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Commit | Line | Data |
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1da177e4 LT |
1 | /*****************************************************************************/ |
2 | ||
3 | /* | |
4 | * devio.c -- User space communication with USB devices. | |
5 | * | |
6 | * Copyright (C) 1999-2000 Thomas Sailer (sailer@ife.ee.ethz.ch) | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
21 | * | |
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" | |
55 | ||
fbf82fd2 KS |
56 | #define USB_MAXBUS 64 |
57 | #define USB_DEVICE_MAX USB_MAXBUS * 128 | |
fbf82fd2 | 58 | |
4a2a8a2c AS |
59 | /* Mutual exclusion for removal, open, and release */ |
60 | DEFINE_MUTEX(usbfs_mutex); | |
61 | ||
cd9f0375 AS |
62 | struct dev_state { |
63 | struct list_head list; /* state list */ | |
64 | struct usb_device *dev; | |
65 | struct file *file; | |
66 | spinlock_t lock; /* protects the async urb lists */ | |
67 | struct list_head async_pending; | |
68 | struct list_head async_completed; | |
69 | wait_queue_head_t wait; /* wake up if a request completed */ | |
70 | unsigned int discsignr; | |
71 | struct pid *disc_pid; | |
72 | uid_t disc_uid, disc_euid; | |
73 | void __user *disccontext; | |
74 | unsigned long ifclaimed; | |
75 | u32 secid; | |
76 | }; | |
77 | ||
1da177e4 LT |
78 | struct async { |
79 | struct list_head asynclist; | |
80 | struct dev_state *ps; | |
2425c08b | 81 | struct pid *pid; |
46113830 | 82 | uid_t uid, euid; |
1da177e4 LT |
83 | unsigned int signr; |
84 | unsigned int ifnum; | |
85 | void __user *userbuffer; | |
86 | void __user *userurb; | |
87 | struct urb *urb; | |
e015268d | 88 | int status; |
7a01955f | 89 | u32 secid; |
1da177e4 LT |
90 | }; |
91 | ||
04e482ff GKH |
92 | static int usbfs_snoop; |
93 | module_param(usbfs_snoop, bool, S_IRUGO | S_IWUSR); | |
94 | MODULE_PARM_DESC(usbfs_snoop, "true to log all usbfs traffic"); | |
1da177e4 LT |
95 | |
96 | #define snoop(dev, format, arg...) \ | |
97 | do { \ | |
98 | if (usbfs_snoop) \ | |
04e482ff | 99 | dev_info(dev , format , ## arg); \ |
1da177e4 LT |
100 | } while (0) |
101 | ||
fad21bdf AS |
102 | #define USB_DEVICE_DEV MKDEV(USB_DEVICE_MAJOR, 0) |
103 | ||
1da177e4 LT |
104 | |
105 | #define MAX_USBFS_BUFFER_SIZE 16384 | |
106 | ||
04e482ff | 107 | static inline int connected(struct dev_state *ps) |
1da177e4 | 108 | { |
349710c3 AS |
109 | return (!list_empty(&ps->list) && |
110 | ps->dev->state != USB_STATE_NOTATTACHED); | |
1da177e4 LT |
111 | } |
112 | ||
113 | static loff_t usbdev_lseek(struct file *file, loff_t offset, int orig) | |
114 | { | |
115 | loff_t ret; | |
116 | ||
117 | lock_kernel(); | |
118 | ||
119 | switch (orig) { | |
120 | case 0: | |
121 | file->f_pos = offset; | |
122 | ret = file->f_pos; | |
123 | break; | |
124 | case 1: | |
125 | file->f_pos += offset; | |
126 | ret = file->f_pos; | |
127 | break; | |
128 | case 2: | |
129 | default: | |
130 | ret = -EINVAL; | |
131 | } | |
132 | ||
133 | unlock_kernel(); | |
134 | return ret; | |
135 | } | |
136 | ||
04e482ff GKH |
137 | static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes, |
138 | loff_t *ppos) | |
1da177e4 | 139 | { |
ec17cf1c | 140 | struct dev_state *ps = file->private_data; |
1da177e4 LT |
141 | struct usb_device *dev = ps->dev; |
142 | ssize_t ret = 0; | |
143 | unsigned len; | |
144 | loff_t pos; | |
145 | int i; | |
146 | ||
147 | pos = *ppos; | |
148 | usb_lock_device(dev); | |
349710c3 | 149 | if (!connected(ps)) { |
1da177e4 LT |
150 | ret = -ENODEV; |
151 | goto err; | |
152 | } else if (pos < 0) { | |
153 | ret = -EINVAL; | |
154 | goto err; | |
155 | } | |
156 | ||
157 | if (pos < sizeof(struct usb_device_descriptor)) { | |
04e482ff GKH |
158 | /* 18 bytes - fits on the stack */ |
159 | struct usb_device_descriptor temp_desc; | |
8781ba0a ON |
160 | |
161 | memcpy(&temp_desc, &dev->descriptor, sizeof(dev->descriptor)); | |
9fcd5c32 AM |
162 | le16_to_cpus(&temp_desc.bcdUSB); |
163 | le16_to_cpus(&temp_desc.idVendor); | |
164 | le16_to_cpus(&temp_desc.idProduct); | |
165 | le16_to_cpus(&temp_desc.bcdDevice); | |
1da177e4 LT |
166 | |
167 | len = sizeof(struct usb_device_descriptor) - pos; | |
168 | if (len > nbytes) | |
169 | len = nbytes; | |
8781ba0a | 170 | if (copy_to_user(buf, ((char *)&temp_desc) + pos, len)) { |
1da177e4 LT |
171 | ret = -EFAULT; |
172 | goto err; | |
173 | } | |
1da177e4 LT |
174 | |
175 | *ppos += len; | |
176 | buf += len; | |
177 | nbytes -= len; | |
178 | ret += len; | |
179 | } | |
180 | ||
181 | pos = sizeof(struct usb_device_descriptor); | |
182 | for (i = 0; nbytes && i < dev->descriptor.bNumConfigurations; i++) { | |
183 | struct usb_config_descriptor *config = | |
184 | (struct usb_config_descriptor *)dev->rawdescriptors[i]; | |
185 | unsigned int length = le16_to_cpu(config->wTotalLength); | |
186 | ||
187 | if (*ppos < pos + length) { | |
188 | ||
189 | /* The descriptor may claim to be longer than it | |
190 | * really is. Here is the actual allocated length. */ | |
191 | unsigned alloclen = | |
192 | le16_to_cpu(dev->config[i].desc.wTotalLength); | |
193 | ||
194 | len = length - (*ppos - pos); | |
195 | if (len > nbytes) | |
196 | len = nbytes; | |
197 | ||
198 | /* Simply don't write (skip over) unallocated parts */ | |
199 | if (alloclen > (*ppos - pos)) { | |
200 | alloclen -= (*ppos - pos); | |
201 | if (copy_to_user(buf, | |
202 | dev->rawdescriptors[i] + (*ppos - pos), | |
203 | min(len, alloclen))) { | |
204 | ret = -EFAULT; | |
205 | goto err; | |
206 | } | |
207 | } | |
208 | ||
209 | *ppos += len; | |
210 | buf += len; | |
211 | nbytes -= len; | |
212 | ret += len; | |
213 | } | |
214 | ||
215 | pos += length; | |
216 | } | |
217 | ||
218 | err: | |
219 | usb_unlock_device(dev); | |
220 | return ret; | |
221 | } | |
222 | ||
223 | /* | |
224 | * async list handling | |
225 | */ | |
226 | ||
227 | static struct async *alloc_async(unsigned int numisoframes) | |
228 | { | |
dd95b814 | 229 | struct async *as; |
0a1ef3b5 | 230 | |
dd95b814 | 231 | as = kzalloc(sizeof(struct async), GFP_KERNEL); |
04e482ff GKH |
232 | if (!as) |
233 | return NULL; | |
1da177e4 LT |
234 | as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL); |
235 | if (!as->urb) { | |
236 | kfree(as); | |
237 | return NULL; | |
238 | } | |
04e482ff | 239 | return as; |
1da177e4 LT |
240 | } |
241 | ||
242 | static void free_async(struct async *as) | |
243 | { | |
2425c08b | 244 | put_pid(as->pid); |
6fd19f4b JJ |
245 | kfree(as->urb->transfer_buffer); |
246 | kfree(as->urb->setup_packet); | |
1da177e4 | 247 | usb_free_urb(as->urb); |
6fd19f4b | 248 | kfree(as); |
1da177e4 LT |
249 | } |
250 | ||
251 | static inline void async_newpending(struct async *as) | |
252 | { | |
04e482ff GKH |
253 | struct dev_state *ps = as->ps; |
254 | unsigned long flags; | |
255 | ||
256 | spin_lock_irqsave(&ps->lock, flags); | |
257 | list_add_tail(&as->asynclist, &ps->async_pending); | |
258 | spin_unlock_irqrestore(&ps->lock, flags); | |
1da177e4 LT |
259 | } |
260 | ||
261 | static inline void async_removepending(struct async *as) | |
262 | { | |
04e482ff GKH |
263 | struct dev_state *ps = as->ps; |
264 | unsigned long flags; | |
265 | ||
266 | spin_lock_irqsave(&ps->lock, flags); | |
267 | list_del_init(&as->asynclist); | |
268 | spin_unlock_irqrestore(&ps->lock, flags); | |
1da177e4 LT |
269 | } |
270 | ||
271 | static inline struct async *async_getcompleted(struct dev_state *ps) | |
272 | { | |
04e482ff GKH |
273 | unsigned long flags; |
274 | struct async *as = NULL; | |
275 | ||
276 | spin_lock_irqsave(&ps->lock, flags); | |
277 | if (!list_empty(&ps->async_completed)) { | |
278 | as = list_entry(ps->async_completed.next, struct async, | |
279 | asynclist); | |
280 | list_del_init(&as->asynclist); | |
281 | } | |
282 | spin_unlock_irqrestore(&ps->lock, flags); | |
283 | return as; | |
1da177e4 LT |
284 | } |
285 | ||
04e482ff GKH |
286 | static inline struct async *async_getpending(struct dev_state *ps, |
287 | void __user *userurb) | |
1da177e4 | 288 | { |
04e482ff GKH |
289 | unsigned long flags; |
290 | struct async *as; | |
1da177e4 | 291 | |
04e482ff | 292 | spin_lock_irqsave(&ps->lock, flags); |
1da177e4 LT |
293 | list_for_each_entry(as, &ps->async_pending, asynclist) |
294 | if (as->userurb == userurb) { | |
295 | list_del_init(&as->asynclist); | |
296 | spin_unlock_irqrestore(&ps->lock, flags); | |
297 | return as; | |
298 | } | |
04e482ff GKH |
299 | spin_unlock_irqrestore(&ps->lock, flags); |
300 | return NULL; | |
1da177e4 LT |
301 | } |
302 | ||
e639dd3f GKH |
303 | static void snoop_urb(struct urb *urb, void __user *userurb) |
304 | { | |
305 | int j; | |
306 | unsigned char *data = urb->transfer_buffer; | |
307 | ||
308 | if (!usbfs_snoop) | |
309 | return; | |
310 | ||
93cf9b90 AS |
311 | dev_info(&urb->dev->dev, "direction=%s\n", |
312 | usb_urb_dir_in(urb) ? "IN" : "OUT"); | |
e639dd3f GKH |
313 | dev_info(&urb->dev->dev, "userurb=%p\n", userurb); |
314 | dev_info(&urb->dev->dev, "transfer_buffer_length=%d\n", | |
315 | urb->transfer_buffer_length); | |
316 | dev_info(&urb->dev->dev, "actual_length=%d\n", urb->actual_length); | |
317 | dev_info(&urb->dev->dev, "data: "); | |
318 | for (j = 0; j < urb->transfer_buffer_length; ++j) | |
04e482ff | 319 | printk("%02x ", data[j]); |
e639dd3f GKH |
320 | printk("\n"); |
321 | } | |
322 | ||
7d12e780 | 323 | static void async_completed(struct urb *urb) |
1da177e4 | 324 | { |
04e482ff GKH |
325 | struct async *as = urb->context; |
326 | struct dev_state *ps = as->ps; | |
1da177e4 LT |
327 | struct siginfo sinfo; |
328 | ||
04e482ff GKH |
329 | spin_lock(&ps->lock); |
330 | list_move_tail(&as->asynclist, &ps->async_completed); | |
331 | spin_unlock(&ps->lock); | |
e015268d | 332 | as->status = urb->status; |
1da177e4 LT |
333 | if (as->signr) { |
334 | sinfo.si_signo = as->signr; | |
e015268d | 335 | sinfo.si_errno = as->status; |
1da177e4 LT |
336 | sinfo.si_code = SI_ASYNCIO; |
337 | sinfo.si_addr = as->userurb; | |
2425c08b | 338 | kill_pid_info_as_uid(as->signr, &sinfo, as->pid, as->uid, |
7a01955f | 339 | as->euid, as->secid); |
1da177e4 | 340 | } |
e639dd3f GKH |
341 | snoop(&urb->dev->dev, "urb complete\n"); |
342 | snoop_urb(urb, as->userurb); | |
343 | wake_up(&ps->wait); | |
1da177e4 LT |
344 | } |
345 | ||
04e482ff | 346 | static void destroy_async(struct dev_state *ps, struct list_head *list) |
1da177e4 LT |
347 | { |
348 | struct async *as; | |
349 | unsigned long flags; | |
350 | ||
351 | spin_lock_irqsave(&ps->lock, flags); | |
352 | while (!list_empty(list)) { | |
353 | as = list_entry(list->next, struct async, asynclist); | |
354 | list_del_init(&as->asynclist); | |
355 | ||
356 | /* drop the spinlock so the completion handler can run */ | |
357 | spin_unlock_irqrestore(&ps->lock, flags); | |
358 | usb_kill_urb(as->urb); | |
359 | spin_lock_irqsave(&ps->lock, flags); | |
360 | } | |
361 | spin_unlock_irqrestore(&ps->lock, flags); | |
1da177e4 LT |
362 | } |
363 | ||
04e482ff GKH |
364 | static void destroy_async_on_interface(struct dev_state *ps, |
365 | unsigned int ifnum) | |
1da177e4 LT |
366 | { |
367 | struct list_head *p, *q, hitlist; | |
368 | unsigned long flags; | |
369 | ||
370 | INIT_LIST_HEAD(&hitlist); | |
371 | spin_lock_irqsave(&ps->lock, flags); | |
372 | list_for_each_safe(p, q, &ps->async_pending) | |
373 | if (ifnum == list_entry(p, struct async, asynclist)->ifnum) | |
374 | list_move_tail(p, &hitlist); | |
375 | spin_unlock_irqrestore(&ps->lock, flags); | |
376 | destroy_async(ps, &hitlist); | |
377 | } | |
378 | ||
379 | static inline void destroy_all_async(struct dev_state *ps) | |
380 | { | |
04e482ff | 381 | destroy_async(ps, &ps->async_pending); |
1da177e4 LT |
382 | } |
383 | ||
384 | /* | |
385 | * interface claims are made only at the request of user level code, | |
386 | * which can also release them (explicitly or by closing files). | |
387 | * they're also undone when devices disconnect. | |
388 | */ | |
389 | ||
04e482ff GKH |
390 | static int driver_probe(struct usb_interface *intf, |
391 | const struct usb_device_id *id) | |
1da177e4 LT |
392 | { |
393 | return -ENODEV; | |
394 | } | |
395 | ||
396 | static void driver_disconnect(struct usb_interface *intf) | |
397 | { | |
04e482ff | 398 | struct dev_state *ps = usb_get_intfdata(intf); |
1da177e4 LT |
399 | unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber; |
400 | ||
401 | if (!ps) | |
402 | return; | |
403 | ||
404 | /* NOTE: this relies on usbcore having canceled and completed | |
405 | * all pending I/O requests; 2.6 does that. | |
406 | */ | |
407 | ||
408 | if (likely(ifnum < 8*sizeof(ps->ifclaimed))) | |
409 | clear_bit(ifnum, &ps->ifclaimed); | |
410 | else | |
3b6004f3 GKH |
411 | dev_warn(&intf->dev, "interface number %u out of range\n", |
412 | ifnum); | |
1da177e4 | 413 | |
04e482ff | 414 | usb_set_intfdata(intf, NULL); |
1da177e4 LT |
415 | |
416 | /* force async requests to complete */ | |
417 | destroy_async_on_interface(ps, ifnum); | |
418 | } | |
419 | ||
2e2eb83f AS |
420 | /* The following routines are merely placeholders. There is no way |
421 | * to inform a user task about suspend or resumes. | |
422 | */ | |
423 | static int driver_suspend(struct usb_interface *intf, pm_message_t msg) | |
424 | { | |
425 | return 0; | |
426 | } | |
427 | ||
428 | static int driver_resume(struct usb_interface *intf) | |
429 | { | |
430 | return 0; | |
431 | } | |
432 | ||
1da177e4 | 433 | struct usb_driver usbfs_driver = { |
1da177e4 LT |
434 | .name = "usbfs", |
435 | .probe = driver_probe, | |
436 | .disconnect = driver_disconnect, | |
2e2eb83f AS |
437 | .suspend = driver_suspend, |
438 | .resume = driver_resume, | |
1da177e4 LT |
439 | }; |
440 | ||
441 | static int claimintf(struct dev_state *ps, unsigned int ifnum) | |
442 | { | |
443 | struct usb_device *dev = ps->dev; | |
444 | struct usb_interface *intf; | |
445 | int err; | |
446 | ||
447 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
448 | return -EINVAL; | |
449 | /* already claimed */ | |
450 | if (test_bit(ifnum, &ps->ifclaimed)) | |
451 | return 0; | |
452 | ||
1da177e4 LT |
453 | intf = usb_ifnum_to_if(dev, ifnum); |
454 | if (!intf) | |
455 | err = -ENOENT; | |
456 | else | |
457 | err = usb_driver_claim_interface(&usbfs_driver, intf, ps); | |
1da177e4 LT |
458 | if (err == 0) |
459 | set_bit(ifnum, &ps->ifclaimed); | |
460 | return err; | |
461 | } | |
462 | ||
463 | static int releaseintf(struct dev_state *ps, unsigned int ifnum) | |
464 | { | |
465 | struct usb_device *dev; | |
466 | struct usb_interface *intf; | |
467 | int err; | |
468 | ||
469 | err = -EINVAL; | |
470 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
471 | return err; | |
472 | dev = ps->dev; | |
1da177e4 LT |
473 | intf = usb_ifnum_to_if(dev, ifnum); |
474 | if (!intf) | |
475 | err = -ENOENT; | |
476 | else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) { | |
477 | usb_driver_release_interface(&usbfs_driver, intf); | |
478 | err = 0; | |
479 | } | |
1da177e4 LT |
480 | return err; |
481 | } | |
482 | ||
483 | static int checkintf(struct dev_state *ps, unsigned int ifnum) | |
484 | { | |
485 | if (ps->dev->state != USB_STATE_CONFIGURED) | |
486 | return -EHOSTUNREACH; | |
487 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
488 | return -EINVAL; | |
489 | if (test_bit(ifnum, &ps->ifclaimed)) | |
490 | return 0; | |
491 | /* if not yet claimed, claim it for the driver */ | |
04e482ff GKH |
492 | dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim " |
493 | "interface %u before use\n", task_pid_nr(current), | |
494 | current->comm, ifnum); | |
1da177e4 LT |
495 | return claimintf(ps, ifnum); |
496 | } | |
497 | ||
498 | static int findintfep(struct usb_device *dev, unsigned int ep) | |
499 | { | |
500 | unsigned int i, j, e; | |
04e482ff | 501 | struct usb_interface *intf; |
1da177e4 LT |
502 | struct usb_host_interface *alts; |
503 | struct usb_endpoint_descriptor *endpt; | |
504 | ||
505 | if (ep & ~(USB_DIR_IN|0xf)) | |
506 | return -EINVAL; | |
507 | if (!dev->actconfig) | |
508 | return -ESRCH; | |
509 | for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) { | |
510 | intf = dev->actconfig->interface[i]; | |
511 | for (j = 0; j < intf->num_altsetting; j++) { | |
04e482ff | 512 | alts = &intf->altsetting[j]; |
1da177e4 LT |
513 | for (e = 0; e < alts->desc.bNumEndpoints; e++) { |
514 | endpt = &alts->endpoint[e].desc; | |
515 | if (endpt->bEndpointAddress == ep) | |
516 | return alts->desc.bInterfaceNumber; | |
517 | } | |
518 | } | |
519 | } | |
04e482ff | 520 | return -ENOENT; |
1da177e4 LT |
521 | } |
522 | ||
04e482ff GKH |
523 | static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype, |
524 | unsigned int index) | |
1da177e4 LT |
525 | { |
526 | int ret = 0; | |
527 | ||
24f8b116 HS |
528 | if (ps->dev->state != USB_STATE_ADDRESS |
529 | && ps->dev->state != USB_STATE_CONFIGURED) | |
1da177e4 LT |
530 | return -EHOSTUNREACH; |
531 | if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype)) | |
532 | return 0; | |
533 | ||
534 | index &= 0xff; | |
535 | switch (requesttype & USB_RECIP_MASK) { | |
536 | case USB_RECIP_ENDPOINT: | |
04e482ff GKH |
537 | ret = findintfep(ps->dev, index); |
538 | if (ret >= 0) | |
1da177e4 LT |
539 | ret = checkintf(ps, ret); |
540 | break; | |
541 | ||
542 | case USB_RECIP_INTERFACE: | |
543 | ret = checkintf(ps, index); | |
544 | break; | |
545 | } | |
546 | return ret; | |
547 | } | |
548 | ||
61ad04a8 | 549 | static int match_devt(struct device *dev, void *data) |
4592bf5a | 550 | { |
a80d5ff0 | 551 | return dev->devt == (dev_t) (unsigned long) data; |
9f8b17e6 | 552 | } |
4592bf5a | 553 | |
61ad04a8 | 554 | static struct usb_device *usbdev_lookup_by_devt(dev_t devt) |
9f8b17e6 KS |
555 | { |
556 | struct device *dev; | |
557 | ||
a80d5ff0 DH |
558 | dev = bus_find_device(&usb_bus_type, NULL, |
559 | (void *) (unsigned long) devt, match_devt); | |
9f8b17e6 KS |
560 | if (!dev) |
561 | return NULL; | |
9f8b17e6 KS |
562 | return container_of(dev, struct usb_device, dev); |
563 | } | |
4592bf5a | 564 | |
1da177e4 LT |
565 | /* |
566 | * file operations | |
567 | */ | |
568 | static int usbdev_open(struct inode *inode, struct file *file) | |
569 | { | |
fbf82fd2 | 570 | struct usb_device *dev = NULL; |
1da177e4 | 571 | struct dev_state *ps; |
86a264ab | 572 | const struct cred *cred = current_cred(); |
1da177e4 LT |
573 | int ret; |
574 | ||
b5b4aa67 | 575 | lock_kernel(); |
4a2a8a2c AS |
576 | /* Protect against simultaneous removal or release */ |
577 | mutex_lock(&usbfs_mutex); | |
578 | ||
1da177e4 | 579 | ret = -ENOMEM; |
04e482ff GKH |
580 | ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL); |
581 | if (!ps) | |
4a2a8a2c | 582 | goto out; |
1da177e4 | 583 | |
1da177e4 | 584 | ret = -ENOENT; |
61ad04a8 | 585 | |
9f8b17e6 | 586 | /* usbdev device-node */ |
fbf82fd2 | 587 | if (imajor(inode) == USB_DEVICE_MAJOR) |
61ad04a8 | 588 | dev = usbdev_lookup_by_devt(inode->i_rdev); |
9f8b17e6 KS |
589 | #ifdef CONFIG_USB_DEVICEFS |
590 | /* procfs file */ | |
d64aac36 | 591 | if (!dev) { |
8e18e294 | 592 | dev = inode->i_private; |
d64aac36 AS |
593 | if (dev && dev->usbfs_dentry && |
594 | dev->usbfs_dentry->d_inode == inode) | |
595 | usb_get_dev(dev); | |
596 | else | |
597 | dev = NULL; | |
598 | } | |
9f8b17e6 | 599 | #endif |
d64aac36 | 600 | if (!dev || dev->state == USB_STATE_NOTATTACHED) |
1da177e4 | 601 | goto out; |
94fcda1f | 602 | ret = usb_autoresume_device(dev); |
01d883d4 AS |
603 | if (ret) |
604 | goto out; | |
605 | ||
1da177e4 LT |
606 | ret = 0; |
607 | ps->dev = dev; | |
608 | ps->file = file; | |
609 | spin_lock_init(&ps->lock); | |
316547fd | 610 | INIT_LIST_HEAD(&ps->list); |
1da177e4 LT |
611 | INIT_LIST_HEAD(&ps->async_pending); |
612 | INIT_LIST_HEAD(&ps->async_completed); | |
613 | init_waitqueue_head(&ps->wait); | |
614 | ps->discsignr = 0; | |
2425c08b | 615 | ps->disc_pid = get_pid(task_pid(current)); |
86a264ab DH |
616 | ps->disc_uid = cred->uid; |
617 | ps->disc_euid = cred->euid; | |
1da177e4 LT |
618 | ps->disccontext = NULL; |
619 | ps->ifclaimed = 0; | |
7a01955f | 620 | security_task_getsecid(current, &ps->secid); |
527660a8 | 621 | smp_wmb(); |
1da177e4 LT |
622 | list_add_tail(&ps->list, &dev->filelist); |
623 | file->private_data = ps; | |
2da41d5f AS |
624 | snoop(&dev->dev, "opened by process %d: %s\n", task_pid_nr(current), |
625 | current->comm); | |
1da177e4 | 626 | out: |
d64aac36 | 627 | if (ret) { |
01d883d4 | 628 | kfree(ps); |
d64aac36 AS |
629 | usb_put_dev(dev); |
630 | } | |
4a2a8a2c | 631 | mutex_unlock(&usbfs_mutex); |
b5b4aa67 | 632 | unlock_kernel(); |
4a2a8a2c | 633 | return ret; |
1da177e4 LT |
634 | } |
635 | ||
636 | static int usbdev_release(struct inode *inode, struct file *file) | |
637 | { | |
ec17cf1c | 638 | struct dev_state *ps = file->private_data; |
1da177e4 LT |
639 | struct usb_device *dev = ps->dev; |
640 | unsigned int ifnum; | |
6ff10464 | 641 | struct async *as; |
1da177e4 LT |
642 | |
643 | usb_lock_device(dev); | |
4a2a8a2c AS |
644 | |
645 | /* Protect against simultaneous open */ | |
646 | mutex_lock(&usbfs_mutex); | |
1da177e4 | 647 | list_del_init(&ps->list); |
4a2a8a2c AS |
648 | mutex_unlock(&usbfs_mutex); |
649 | ||
1da177e4 LT |
650 | for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed); |
651 | ifnum++) { | |
652 | if (test_bit(ifnum, &ps->ifclaimed)) | |
653 | releaseintf(ps, ifnum); | |
654 | } | |
655 | destroy_all_async(ps); | |
94fcda1f | 656 | usb_autosuspend_device(dev); |
1da177e4 LT |
657 | usb_unlock_device(dev); |
658 | usb_put_dev(dev); | |
2425c08b | 659 | put_pid(ps->disc_pid); |
6ff10464 AS |
660 | |
661 | as = async_getcompleted(ps); | |
662 | while (as) { | |
663 | free_async(as); | |
664 | as = async_getcompleted(ps); | |
665 | } | |
1da177e4 | 666 | kfree(ps); |
4a2a8a2c | 667 | return 0; |
1da177e4 LT |
668 | } |
669 | ||
670 | static int proc_control(struct dev_state *ps, void __user *arg) | |
671 | { | |
672 | struct usb_device *dev = ps->dev; | |
673 | struct usbdevfs_ctrltransfer ctrl; | |
674 | unsigned int tmo; | |
675 | unsigned char *tbuf; | |
ff66e3ce | 676 | unsigned wLength; |
1da177e4 LT |
677 | int i, j, ret; |
678 | ||
679 | if (copy_from_user(&ctrl, arg, sizeof(ctrl))) | |
680 | return -EFAULT; | |
04e482ff GKH |
681 | ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.wIndex); |
682 | if (ret) | |
1da177e4 | 683 | return ret; |
ff66e3ce AM |
684 | wLength = ctrl.wLength; /* To suppress 64k PAGE_SIZE warning */ |
685 | if (wLength > PAGE_SIZE) | |
1da177e4 | 686 | return -EINVAL; |
04e482ff GKH |
687 | tbuf = (unsigned char *)__get_free_page(GFP_KERNEL); |
688 | if (!tbuf) | |
1da177e4 LT |
689 | return -ENOMEM; |
690 | tmo = ctrl.timeout; | |
691 | if (ctrl.bRequestType & 0x80) { | |
04e482ff GKH |
692 | if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data, |
693 | ctrl.wLength)) { | |
1da177e4 LT |
694 | free_page((unsigned long)tbuf); |
695 | return -EINVAL; | |
696 | } | |
fe0410c7 AS |
697 | snoop(&dev->dev, "control read: bRequest=%02x " |
698 | "bRrequestType=%02x wValue=%04x " | |
699 | "wIndex=%04x wLength=%04x\n", | |
700 | ctrl.bRequest, ctrl.bRequestType, ctrl.wValue, | |
701 | ctrl.wIndex, ctrl.wLength); | |
1da177e4 LT |
702 | |
703 | usb_unlock_device(dev); | |
04e482ff GKH |
704 | i = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), ctrl.bRequest, |
705 | ctrl.bRequestType, ctrl.wValue, ctrl.wIndex, | |
706 | tbuf, ctrl.wLength, tmo); | |
1da177e4 LT |
707 | usb_lock_device(dev); |
708 | if ((i > 0) && ctrl.wLength) { | |
709 | if (usbfs_snoop) { | |
710 | dev_info(&dev->dev, "control read: data "); | |
fe0410c7 | 711 | for (j = 0; j < i; ++j) |
04e482ff | 712 | printk("%02x ", (u8)(tbuf)[j]); |
1da177e4 LT |
713 | printk("\n"); |
714 | } | |
fe0410c7 | 715 | if (copy_to_user(ctrl.data, tbuf, i)) { |
1da177e4 LT |
716 | free_page((unsigned long)tbuf); |
717 | return -EFAULT; | |
718 | } | |
719 | } | |
720 | } else { | |
721 | if (ctrl.wLength) { | |
722 | if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) { | |
723 | free_page((unsigned long)tbuf); | |
724 | return -EFAULT; | |
725 | } | |
726 | } | |
fe0410c7 AS |
727 | snoop(&dev->dev, "control write: bRequest=%02x " |
728 | "bRrequestType=%02x wValue=%04x " | |
729 | "wIndex=%04x wLength=%04x\n", | |
730 | ctrl.bRequest, ctrl.bRequestType, ctrl.wValue, | |
731 | ctrl.wIndex, ctrl.wLength); | |
1da177e4 LT |
732 | if (usbfs_snoop) { |
733 | dev_info(&dev->dev, "control write: data: "); | |
734 | for (j = 0; j < ctrl.wLength; ++j) | |
e639dd3f | 735 | printk("%02x ", (unsigned char)(tbuf)[j]); |
1da177e4 LT |
736 | printk("\n"); |
737 | } | |
738 | usb_unlock_device(dev); | |
04e482ff GKH |
739 | i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest, |
740 | ctrl.bRequestType, ctrl.wValue, ctrl.wIndex, | |
741 | tbuf, ctrl.wLength, tmo); | |
1da177e4 LT |
742 | usb_lock_device(dev); |
743 | } | |
744 | free_page((unsigned long)tbuf); | |
04e482ff | 745 | if (i < 0 && i != -EPIPE) { |
1da177e4 LT |
746 | dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL " |
747 | "failed cmd %s rqt %u rq %u len %u ret %d\n", | |
748 | current->comm, ctrl.bRequestType, ctrl.bRequest, | |
749 | ctrl.wLength, i); | |
750 | } | |
751 | return i; | |
752 | } | |
753 | ||
754 | static int proc_bulk(struct dev_state *ps, void __user *arg) | |
755 | { | |
756 | struct usb_device *dev = ps->dev; | |
757 | struct usbdevfs_bulktransfer bulk; | |
758 | unsigned int tmo, len1, pipe; | |
759 | int len2; | |
760 | unsigned char *tbuf; | |
e639dd3f | 761 | int i, j, ret; |
1da177e4 LT |
762 | |
763 | if (copy_from_user(&bulk, arg, sizeof(bulk))) | |
764 | return -EFAULT; | |
04e482ff GKH |
765 | ret = findintfep(ps->dev, bulk.ep); |
766 | if (ret < 0) | |
1da177e4 | 767 | return ret; |
04e482ff GKH |
768 | ret = checkintf(ps, ret); |
769 | if (ret) | |
1da177e4 LT |
770 | return ret; |
771 | if (bulk.ep & USB_DIR_IN) | |
772 | pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f); | |
773 | else | |
774 | pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f); | |
775 | if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN))) | |
776 | return -EINVAL; | |
777 | len1 = bulk.len; | |
778 | if (len1 > MAX_USBFS_BUFFER_SIZE) | |
779 | return -EINVAL; | |
780 | if (!(tbuf = kmalloc(len1, GFP_KERNEL))) | |
781 | return -ENOMEM; | |
782 | tmo = bulk.timeout; | |
783 | if (bulk.ep & 0x80) { | |
784 | if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) { | |
785 | kfree(tbuf); | |
786 | return -EINVAL; | |
787 | } | |
e639dd3f GKH |
788 | snoop(&dev->dev, "bulk read: len=0x%02x timeout=%04d\n", |
789 | bulk.len, bulk.timeout); | |
1da177e4 LT |
790 | usb_unlock_device(dev); |
791 | i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo); | |
792 | usb_lock_device(dev); | |
793 | if (!i && len2) { | |
e639dd3f GKH |
794 | if (usbfs_snoop) { |
795 | dev_info(&dev->dev, "bulk read: data "); | |
796 | for (j = 0; j < len2; ++j) | |
04e482ff | 797 | printk("%02x ", (u8)(tbuf)[j]); |
e639dd3f GKH |
798 | printk("\n"); |
799 | } | |
1da177e4 LT |
800 | if (copy_to_user(bulk.data, tbuf, len2)) { |
801 | kfree(tbuf); | |
802 | return -EFAULT; | |
803 | } | |
804 | } | |
805 | } else { | |
806 | if (len1) { | |
807 | if (copy_from_user(tbuf, bulk.data, len1)) { | |
808 | kfree(tbuf); | |
809 | return -EFAULT; | |
810 | } | |
811 | } | |
e639dd3f GKH |
812 | snoop(&dev->dev, "bulk write: len=0x%02x timeout=%04d\n", |
813 | bulk.len, bulk.timeout); | |
814 | if (usbfs_snoop) { | |
815 | dev_info(&dev->dev, "bulk write: data: "); | |
816 | for (j = 0; j < len1; ++j) | |
817 | printk("%02x ", (unsigned char)(tbuf)[j]); | |
818 | printk("\n"); | |
819 | } | |
1da177e4 LT |
820 | usb_unlock_device(dev); |
821 | i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo); | |
822 | usb_lock_device(dev); | |
823 | } | |
824 | kfree(tbuf); | |
825 | if (i < 0) | |
826 | return i; | |
827 | return len2; | |
828 | } | |
829 | ||
830 | static int proc_resetep(struct dev_state *ps, void __user *arg) | |
831 | { | |
832 | unsigned int ep; | |
833 | int ret; | |
834 | ||
835 | if (get_user(ep, (unsigned int __user *)arg)) | |
836 | return -EFAULT; | |
04e482ff GKH |
837 | ret = findintfep(ps->dev, ep); |
838 | if (ret < 0) | |
1da177e4 | 839 | return ret; |
04e482ff GKH |
840 | ret = checkintf(ps, ret); |
841 | if (ret) | |
1da177e4 LT |
842 | return ret; |
843 | usb_settoggle(ps->dev, ep & 0xf, !(ep & USB_DIR_IN), 0); | |
844 | return 0; | |
845 | } | |
846 | ||
847 | static int proc_clearhalt(struct dev_state *ps, void __user *arg) | |
848 | { | |
849 | unsigned int ep; | |
850 | int pipe; | |
851 | int ret; | |
852 | ||
853 | if (get_user(ep, (unsigned int __user *)arg)) | |
854 | return -EFAULT; | |
04e482ff GKH |
855 | ret = findintfep(ps->dev, ep); |
856 | if (ret < 0) | |
1da177e4 | 857 | return ret; |
04e482ff GKH |
858 | ret = checkintf(ps, ret); |
859 | if (ret) | |
1da177e4 LT |
860 | return ret; |
861 | if (ep & USB_DIR_IN) | |
04e482ff GKH |
862 | pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f); |
863 | else | |
864 | pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f); | |
1da177e4 LT |
865 | |
866 | return usb_clear_halt(ps->dev, pipe); | |
867 | } | |
1da177e4 LT |
868 | |
869 | static int proc_getdriver(struct dev_state *ps, void __user *arg) | |
870 | { | |
871 | struct usbdevfs_getdriver gd; | |
872 | struct usb_interface *intf; | |
873 | int ret; | |
874 | ||
875 | if (copy_from_user(&gd, arg, sizeof(gd))) | |
876 | return -EFAULT; | |
1da177e4 LT |
877 | intf = usb_ifnum_to_if(ps->dev, gd.interface); |
878 | if (!intf || !intf->dev.driver) | |
879 | ret = -ENODATA; | |
880 | else { | |
881 | strncpy(gd.driver, intf->dev.driver->name, | |
882 | sizeof(gd.driver)); | |
883 | ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0); | |
884 | } | |
1da177e4 LT |
885 | return ret; |
886 | } | |
887 | ||
888 | static int proc_connectinfo(struct dev_state *ps, void __user *arg) | |
889 | { | |
890 | struct usbdevfs_connectinfo ci; | |
891 | ||
892 | ci.devnum = ps->dev->devnum; | |
893 | ci.slow = ps->dev->speed == USB_SPEED_LOW; | |
894 | if (copy_to_user(arg, &ci, sizeof(ci))) | |
895 | return -EFAULT; | |
896 | return 0; | |
897 | } | |
898 | ||
899 | static int proc_resetdevice(struct dev_state *ps) | |
900 | { | |
742120c6 | 901 | return usb_reset_device(ps->dev); |
1da177e4 LT |
902 | } |
903 | ||
904 | static int proc_setintf(struct dev_state *ps, void __user *arg) | |
905 | { | |
906 | struct usbdevfs_setinterface setintf; | |
907 | int ret; | |
908 | ||
909 | if (copy_from_user(&setintf, arg, sizeof(setintf))) | |
910 | return -EFAULT; | |
911 | if ((ret = checkintf(ps, setintf.interface))) | |
912 | return ret; | |
913 | return usb_set_interface(ps->dev, setintf.interface, | |
914 | setintf.altsetting); | |
915 | } | |
916 | ||
917 | static int proc_setconfig(struct dev_state *ps, void __user *arg) | |
918 | { | |
3f141e2a | 919 | int u; |
1da177e4 | 920 | int status = 0; |
04e482ff | 921 | struct usb_host_config *actconfig; |
1da177e4 | 922 | |
3f141e2a | 923 | if (get_user(u, (int __user *)arg)) |
1da177e4 LT |
924 | return -EFAULT; |
925 | ||
04e482ff GKH |
926 | actconfig = ps->dev->actconfig; |
927 | ||
928 | /* Don't touch the device if any interfaces are claimed. | |
929 | * It could interfere with other drivers' operations, and if | |
1da177e4 LT |
930 | * an interface is claimed by usbfs it could easily deadlock. |
931 | */ | |
04e482ff GKH |
932 | if (actconfig) { |
933 | int i; | |
934 | ||
935 | for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) { | |
936 | if (usb_interface_claimed(actconfig->interface[i])) { | |
937 | dev_warn(&ps->dev->dev, | |
72ebddb5 | 938 | "usbfs: interface %d claimed by %s " |
1da177e4 LT |
939 | "while '%s' sets config #%d\n", |
940 | actconfig->interface[i] | |
941 | ->cur_altsetting | |
942 | ->desc.bInterfaceNumber, | |
72ebddb5 DB |
943 | actconfig->interface[i] |
944 | ->dev.driver->name, | |
1da177e4 | 945 | current->comm, u); |
04e482ff | 946 | status = -EBUSY; |
1da177e4 | 947 | break; |
1da177e4 | 948 | } |
04e482ff GKH |
949 | } |
950 | } | |
1da177e4 LT |
951 | |
952 | /* SET_CONFIGURATION is often abused as a "cheap" driver reset, | |
953 | * so avoid usb_set_configuration()'s kick to sysfs | |
954 | */ | |
955 | if (status == 0) { | |
956 | if (actconfig && actconfig->desc.bConfigurationValue == u) | |
957 | status = usb_reset_configuration(ps->dev); | |
958 | else | |
959 | status = usb_set_configuration(ps->dev, u); | |
960 | } | |
961 | ||
962 | return status; | |
963 | } | |
964 | ||
1da177e4 | 965 | static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb, |
04e482ff GKH |
966 | struct usbdevfs_iso_packet_desc __user *iso_frame_desc, |
967 | void __user *arg) | |
1da177e4 LT |
968 | { |
969 | struct usbdevfs_iso_packet_desc *isopkt = NULL; | |
970 | struct usb_host_endpoint *ep; | |
971 | struct async *as; | |
972 | struct usb_ctrlrequest *dr = NULL; | |
86a264ab | 973 | const struct cred *cred = current_cred(); |
1da177e4 | 974 | unsigned int u, totlen, isofrmlen; |
97b9eb91 | 975 | int ret, ifnum = -1; |
93cf9b90 | 976 | int is_in; |
1da177e4 | 977 | |
14722ef4 AS |
978 | if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP | |
979 | USBDEVFS_URB_SHORT_NOT_OK | | |
980 | USBDEVFS_URB_NO_FSBR | | |
981 | USBDEVFS_URB_ZERO_PACKET | | |
982 | USBDEVFS_URB_NO_INTERRUPT)) | |
1da177e4 LT |
983 | return -EINVAL; |
984 | if (!uurb->buffer) | |
985 | return -EINVAL; | |
04e482ff GKH |
986 | if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL && |
987 | (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) { | |
988 | ifnum = findintfep(ps->dev, uurb->endpoint); | |
989 | if (ifnum < 0) | |
1da177e4 | 990 | return ifnum; |
04e482ff GKH |
991 | ret = checkintf(ps, ifnum); |
992 | if (ret) | |
1da177e4 LT |
993 | return ret; |
994 | } | |
93cf9b90 AS |
995 | if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0) { |
996 | is_in = 1; | |
997 | ep = ps->dev->ep_in[uurb->endpoint & USB_ENDPOINT_NUMBER_MASK]; | |
998 | } else { | |
999 | is_in = 0; | |
1000 | ep = ps->dev->ep_out[uurb->endpoint & USB_ENDPOINT_NUMBER_MASK]; | |
1001 | } | |
1da177e4 LT |
1002 | if (!ep) |
1003 | return -ENOENT; | |
1004 | switch(uurb->type) { | |
1005 | case USBDEVFS_URB_TYPE_CONTROL: | |
93cf9b90 | 1006 | if (!usb_endpoint_xfer_control(&ep->desc)) |
1da177e4 | 1007 | return -EINVAL; |
04e482ff GKH |
1008 | /* min 8 byte setup packet, |
1009 | * max 8 byte setup plus an arbitrary data stage */ | |
1010 | if (uurb->buffer_length < 8 || | |
1011 | uurb->buffer_length > (8 + MAX_USBFS_BUFFER_SIZE)) | |
1da177e4 | 1012 | return -EINVAL; |
04e482ff GKH |
1013 | dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL); |
1014 | if (!dr) | |
1da177e4 LT |
1015 | return -ENOMEM; |
1016 | if (copy_from_user(dr, uurb->buffer, 8)) { | |
1017 | kfree(dr); | |
1018 | return -EFAULT; | |
1019 | } | |
1020 | if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) { | |
1021 | kfree(dr); | |
1022 | return -EINVAL; | |
1023 | } | |
04e482ff GKH |
1024 | ret = check_ctrlrecip(ps, dr->bRequestType, |
1025 | le16_to_cpup(&dr->wIndex)); | |
1026 | if (ret) { | |
1da177e4 LT |
1027 | kfree(dr); |
1028 | return ret; | |
1029 | } | |
1da177e4 LT |
1030 | uurb->number_of_packets = 0; |
1031 | uurb->buffer_length = le16_to_cpup(&dr->wLength); | |
1032 | uurb->buffer += 8; | |
93cf9b90 AS |
1033 | if ((dr->bRequestType & USB_DIR_IN) && uurb->buffer_length) { |
1034 | is_in = 1; | |
1035 | uurb->endpoint |= USB_DIR_IN; | |
1036 | } else { | |
1037 | is_in = 0; | |
1038 | uurb->endpoint &= ~USB_DIR_IN; | |
1039 | } | |
1040 | if (!access_ok(is_in ? VERIFY_WRITE : VERIFY_READ, | |
1041 | uurb->buffer, uurb->buffer_length)) { | |
1da177e4 LT |
1042 | kfree(dr); |
1043 | return -EFAULT; | |
1044 | } | |
df251b8b CF |
1045 | snoop(&ps->dev->dev, "control urb: bRequest=%02x " |
1046 | "bRrequestType=%02x wValue=%04x " | |
1047 | "wIndex=%04x wLength=%04x\n", | |
93cf9b90 AS |
1048 | dr->bRequest, dr->bRequestType, |
1049 | __le16_to_cpup(&dr->wValue), | |
1050 | __le16_to_cpup(&dr->wIndex), | |
1051 | __le16_to_cpup(&dr->wLength)); | |
1da177e4 LT |
1052 | break; |
1053 | ||
1054 | case USBDEVFS_URB_TYPE_BULK: | |
93cf9b90 | 1055 | switch (usb_endpoint_type(&ep->desc)) { |
1da177e4 LT |
1056 | case USB_ENDPOINT_XFER_CONTROL: |
1057 | case USB_ENDPOINT_XFER_ISOC: | |
1058 | return -EINVAL; | |
1059 | /* allow single-shot interrupt transfers, at bogus rates */ | |
1060 | } | |
1061 | uurb->number_of_packets = 0; | |
1062 | if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE) | |
1063 | return -EINVAL; | |
93cf9b90 AS |
1064 | if (!access_ok(is_in ? VERIFY_WRITE : VERIFY_READ, |
1065 | uurb->buffer, uurb->buffer_length)) | |
1da177e4 | 1066 | return -EFAULT; |
e639dd3f | 1067 | snoop(&ps->dev->dev, "bulk urb\n"); |
1da177e4 LT |
1068 | break; |
1069 | ||
1070 | case USBDEVFS_URB_TYPE_ISO: | |
1071 | /* arbitrary limit */ | |
04e482ff GKH |
1072 | if (uurb->number_of_packets < 1 || |
1073 | uurb->number_of_packets > 128) | |
1da177e4 | 1074 | return -EINVAL; |
93cf9b90 | 1075 | if (!usb_endpoint_xfer_isoc(&ep->desc)) |
1da177e4 | 1076 | return -EINVAL; |
04e482ff GKH |
1077 | isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * |
1078 | uurb->number_of_packets; | |
1da177e4 LT |
1079 | if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL))) |
1080 | return -ENOMEM; | |
1081 | if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) { | |
1082 | kfree(isopkt); | |
1083 | return -EFAULT; | |
1084 | } | |
1085 | for (totlen = u = 0; u < uurb->number_of_packets; u++) { | |
04e482ff GKH |
1086 | /* arbitrary limit, |
1087 | * sufficient for USB 2.0 high-bandwidth iso */ | |
3612242e | 1088 | if (isopkt[u].length > 8192) { |
1da177e4 LT |
1089 | kfree(isopkt); |
1090 | return -EINVAL; | |
1091 | } | |
1092 | totlen += isopkt[u].length; | |
1093 | } | |
1094 | if (totlen > 32768) { | |
1095 | kfree(isopkt); | |
1096 | return -EINVAL; | |
1097 | } | |
1098 | uurb->buffer_length = totlen; | |
e639dd3f | 1099 | snoop(&ps->dev->dev, "iso urb\n"); |
1da177e4 LT |
1100 | break; |
1101 | ||
1102 | case USBDEVFS_URB_TYPE_INTERRUPT: | |
1103 | uurb->number_of_packets = 0; | |
93cf9b90 | 1104 | if (!usb_endpoint_xfer_int(&ep->desc)) |
1da177e4 | 1105 | return -EINVAL; |
1da177e4 LT |
1106 | if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE) |
1107 | return -EINVAL; | |
93cf9b90 AS |
1108 | if (!access_ok(is_in ? VERIFY_WRITE : VERIFY_READ, |
1109 | uurb->buffer, uurb->buffer_length)) | |
1da177e4 | 1110 | return -EFAULT; |
e639dd3f | 1111 | snoop(&ps->dev->dev, "interrupt urb\n"); |
1da177e4 LT |
1112 | break; |
1113 | ||
1114 | default: | |
1115 | return -EINVAL; | |
1116 | } | |
04e482ff GKH |
1117 | as = alloc_async(uurb->number_of_packets); |
1118 | if (!as) { | |
6fd19f4b JJ |
1119 | kfree(isopkt); |
1120 | kfree(dr); | |
1da177e4 LT |
1121 | return -ENOMEM; |
1122 | } | |
04e482ff GKH |
1123 | as->urb->transfer_buffer = kmalloc(uurb->buffer_length, GFP_KERNEL); |
1124 | if (!as->urb->transfer_buffer) { | |
6fd19f4b JJ |
1125 | kfree(isopkt); |
1126 | kfree(dr); | |
1da177e4 LT |
1127 | free_async(as); |
1128 | return -ENOMEM; | |
1129 | } | |
04e482ff GKH |
1130 | as->urb->dev = ps->dev; |
1131 | as->urb->pipe = (uurb->type << 30) | | |
93cf9b90 AS |
1132 | __create_pipe(ps->dev, uurb->endpoint & 0xf) | |
1133 | (uurb->endpoint & USB_DIR_IN); | |
14722ef4 AS |
1134 | |
1135 | /* This tedious sequence is necessary because the URB_* flags | |
1136 | * are internal to the kernel and subject to change, whereas | |
1137 | * the USBDEVFS_URB_* flags are a user API and must not be changed. | |
1138 | */ | |
1139 | u = (is_in ? URB_DIR_IN : URB_DIR_OUT); | |
1140 | if (uurb->flags & USBDEVFS_URB_ISO_ASAP) | |
1141 | u |= URB_ISO_ASAP; | |
1142 | if (uurb->flags & USBDEVFS_URB_SHORT_NOT_OK) | |
1143 | u |= URB_SHORT_NOT_OK; | |
1144 | if (uurb->flags & USBDEVFS_URB_NO_FSBR) | |
1145 | u |= URB_NO_FSBR; | |
1146 | if (uurb->flags & USBDEVFS_URB_ZERO_PACKET) | |
1147 | u |= URB_ZERO_PACKET; | |
1148 | if (uurb->flags & USBDEVFS_URB_NO_INTERRUPT) | |
1149 | u |= URB_NO_INTERRUPT; | |
1150 | as->urb->transfer_flags = u; | |
1151 | ||
1da177e4 | 1152 | as->urb->transfer_buffer_length = uurb->buffer_length; |
04e482ff | 1153 | as->urb->setup_packet = (unsigned char *)dr; |
1da177e4 LT |
1154 | as->urb->start_frame = uurb->start_frame; |
1155 | as->urb->number_of_packets = uurb->number_of_packets; | |
97b9eb91 AS |
1156 | if (uurb->type == USBDEVFS_URB_TYPE_ISO || |
1157 | ps->dev->speed == USB_SPEED_HIGH) | |
1158 | as->urb->interval = 1 << min(15, ep->desc.bInterval - 1); | |
1159 | else | |
1160 | as->urb->interval = ep->desc.bInterval; | |
04e482ff GKH |
1161 | as->urb->context = as; |
1162 | as->urb->complete = async_completed; | |
1da177e4 LT |
1163 | for (totlen = u = 0; u < uurb->number_of_packets; u++) { |
1164 | as->urb->iso_frame_desc[u].offset = totlen; | |
1165 | as->urb->iso_frame_desc[u].length = isopkt[u].length; | |
1166 | totlen += isopkt[u].length; | |
1167 | } | |
6fd19f4b | 1168 | kfree(isopkt); |
1da177e4 | 1169 | as->ps = ps; |
04e482ff | 1170 | as->userurb = arg; |
1da177e4 LT |
1171 | if (uurb->endpoint & USB_DIR_IN) |
1172 | as->userbuffer = uurb->buffer; | |
1173 | else | |
1174 | as->userbuffer = NULL; | |
1175 | as->signr = uurb->signr; | |
1176 | as->ifnum = ifnum; | |
2425c08b | 1177 | as->pid = get_pid(task_pid(current)); |
86a264ab DH |
1178 | as->uid = cred->uid; |
1179 | as->euid = cred->euid; | |
7a01955f | 1180 | security_task_getsecid(current, &as->secid); |
93cf9b90 AS |
1181 | if (!is_in) { |
1182 | if (copy_from_user(as->urb->transfer_buffer, uurb->buffer, | |
1183 | as->urb->transfer_buffer_length)) { | |
1da177e4 LT |
1184 | free_async(as); |
1185 | return -EFAULT; | |
1186 | } | |
1187 | } | |
e639dd3f | 1188 | snoop_urb(as->urb, as->userurb); |
04e482ff GKH |
1189 | async_newpending(as); |
1190 | if ((ret = usb_submit_urb(as->urb, GFP_KERNEL))) { | |
1191 | dev_printk(KERN_DEBUG, &ps->dev->dev, | |
1192 | "usbfs: usb_submit_urb returned %d\n", ret); | |
1193 | async_removepending(as); | |
1194 | free_async(as); | |
1195 | return ret; | |
1196 | } | |
1197 | return 0; | |
1da177e4 LT |
1198 | } |
1199 | ||
1200 | static int proc_submiturb(struct dev_state *ps, void __user *arg) | |
1201 | { | |
1202 | struct usbdevfs_urb uurb; | |
1203 | ||
1204 | if (copy_from_user(&uurb, arg, sizeof(uurb))) | |
1205 | return -EFAULT; | |
1206 | ||
04e482ff GKH |
1207 | return proc_do_submiturb(ps, &uurb, |
1208 | (((struct usbdevfs_urb __user *)arg)->iso_frame_desc), | |
1209 | arg); | |
1da177e4 LT |
1210 | } |
1211 | ||
1212 | static int proc_unlinkurb(struct dev_state *ps, void __user *arg) | |
1213 | { | |
1214 | struct async *as; | |
1215 | ||
1216 | as = async_getpending(ps, arg); | |
1217 | if (!as) | |
1218 | return -EINVAL; | |
1219 | usb_kill_urb(as->urb); | |
1220 | return 0; | |
1221 | } | |
1222 | ||
1223 | static int processcompl(struct async *as, void __user * __user *arg) | |
1224 | { | |
1225 | struct urb *urb = as->urb; | |
1226 | struct usbdevfs_urb __user *userurb = as->userurb; | |
1227 | void __user *addr = as->userurb; | |
1228 | unsigned int i; | |
1229 | ||
1230 | if (as->userbuffer) | |
04e482ff GKH |
1231 | if (copy_to_user(as->userbuffer, urb->transfer_buffer, |
1232 | urb->transfer_buffer_length)) | |
1da177e4 | 1233 | return -EFAULT; |
e015268d | 1234 | if (put_user(as->status, &userurb->status)) |
1da177e4 LT |
1235 | return -EFAULT; |
1236 | if (put_user(urb->actual_length, &userurb->actual_length)) | |
1237 | return -EFAULT; | |
1238 | if (put_user(urb->error_count, &userurb->error_count)) | |
1239 | return -EFAULT; | |
1240 | ||
93cf9b90 | 1241 | if (usb_endpoint_xfer_isoc(&urb->ep->desc)) { |
668a9541 CL |
1242 | for (i = 0; i < urb->number_of_packets; i++) { |
1243 | if (put_user(urb->iso_frame_desc[i].actual_length, | |
1244 | &userurb->iso_frame_desc[i].actual_length)) | |
1245 | return -EFAULT; | |
1246 | if (put_user(urb->iso_frame_desc[i].status, | |
1247 | &userurb->iso_frame_desc[i].status)) | |
1248 | return -EFAULT; | |
1249 | } | |
1da177e4 LT |
1250 | } |
1251 | ||
1252 | free_async(as); | |
1253 | ||
1254 | if (put_user(addr, (void __user * __user *)arg)) | |
1255 | return -EFAULT; | |
1256 | return 0; | |
1257 | } | |
1258 | ||
04e482ff | 1259 | static struct async *reap_as(struct dev_state *ps) |
1da177e4 | 1260 | { |
04e482ff | 1261 | DECLARE_WAITQUEUE(wait, current); |
1da177e4 LT |
1262 | struct async *as = NULL; |
1263 | struct usb_device *dev = ps->dev; | |
1264 | ||
1265 | add_wait_queue(&ps->wait, &wait); | |
1266 | for (;;) { | |
1267 | __set_current_state(TASK_INTERRUPTIBLE); | |
04e482ff GKH |
1268 | as = async_getcompleted(ps); |
1269 | if (as) | |
1da177e4 LT |
1270 | break; |
1271 | if (signal_pending(current)) | |
1272 | break; | |
1273 | usb_unlock_device(dev); | |
1274 | schedule(); | |
1275 | usb_lock_device(dev); | |
1276 | } | |
1277 | remove_wait_queue(&ps->wait, &wait); | |
1278 | set_current_state(TASK_RUNNING); | |
1279 | return as; | |
1280 | } | |
1281 | ||
1282 | static int proc_reapurb(struct dev_state *ps, void __user *arg) | |
1283 | { | |
1284 | struct async *as = reap_as(ps); | |
1285 | if (as) | |
1286 | return processcompl(as, (void __user * __user *)arg); | |
1287 | if (signal_pending(current)) | |
1288 | return -EINTR; | |
1289 | return -EIO; | |
1290 | } | |
1291 | ||
1292 | static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg) | |
1293 | { | |
1294 | struct async *as; | |
1295 | ||
1296 | if (!(as = async_getcompleted(ps))) | |
1297 | return -EAGAIN; | |
1298 | return processcompl(as, (void __user * __user *)arg); | |
1299 | } | |
1300 | ||
1301 | #ifdef CONFIG_COMPAT | |
1302 | ||
1303 | static int get_urb32(struct usbdevfs_urb *kurb, | |
1304 | struct usbdevfs_urb32 __user *uurb) | |
1305 | { | |
1306 | __u32 uptr; | |
1307 | if (get_user(kurb->type, &uurb->type) || | |
1308 | __get_user(kurb->endpoint, &uurb->endpoint) || | |
1309 | __get_user(kurb->status, &uurb->status) || | |
1310 | __get_user(kurb->flags, &uurb->flags) || | |
1311 | __get_user(kurb->buffer_length, &uurb->buffer_length) || | |
1312 | __get_user(kurb->actual_length, &uurb->actual_length) || | |
1313 | __get_user(kurb->start_frame, &uurb->start_frame) || | |
1314 | __get_user(kurb->number_of_packets, &uurb->number_of_packets) || | |
1315 | __get_user(kurb->error_count, &uurb->error_count) || | |
1316 | __get_user(kurb->signr, &uurb->signr)) | |
1317 | return -EFAULT; | |
1318 | ||
1319 | if (__get_user(uptr, &uurb->buffer)) | |
1320 | return -EFAULT; | |
1321 | kurb->buffer = compat_ptr(uptr); | |
ed0c7720 | 1322 | if (__get_user(uptr, &uurb->usercontext)) |
1da177e4 LT |
1323 | return -EFAULT; |
1324 | kurb->usercontext = compat_ptr(uptr); | |
1325 | ||
1326 | return 0; | |
1327 | } | |
1328 | ||
1329 | static int proc_submiturb_compat(struct dev_state *ps, void __user *arg) | |
1330 | { | |
1331 | struct usbdevfs_urb uurb; | |
1332 | ||
04e482ff | 1333 | if (get_urb32(&uurb, (struct usbdevfs_urb32 __user *)arg)) |
1da177e4 LT |
1334 | return -EFAULT; |
1335 | ||
04e482ff GKH |
1336 | return proc_do_submiturb(ps, &uurb, |
1337 | ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc, | |
1338 | arg); | |
1da177e4 LT |
1339 | } |
1340 | ||
1341 | static int processcompl_compat(struct async *as, void __user * __user *arg) | |
1342 | { | |
1343 | struct urb *urb = as->urb; | |
1344 | struct usbdevfs_urb32 __user *userurb = as->userurb; | |
1345 | void __user *addr = as->userurb; | |
1346 | unsigned int i; | |
1347 | ||
1348 | if (as->userbuffer) | |
04e482ff GKH |
1349 | if (copy_to_user(as->userbuffer, urb->transfer_buffer, |
1350 | urb->transfer_buffer_length)) | |
1da177e4 | 1351 | return -EFAULT; |
e015268d | 1352 | if (put_user(as->status, &userurb->status)) |
1da177e4 LT |
1353 | return -EFAULT; |
1354 | if (put_user(urb->actual_length, &userurb->actual_length)) | |
1355 | return -EFAULT; | |
1356 | if (put_user(urb->error_count, &userurb->error_count)) | |
1357 | return -EFAULT; | |
1358 | ||
93cf9b90 | 1359 | if (usb_endpoint_xfer_isoc(&urb->ep->desc)) { |
668a9541 CL |
1360 | for (i = 0; i < urb->number_of_packets; i++) { |
1361 | if (put_user(urb->iso_frame_desc[i].actual_length, | |
1362 | &userurb->iso_frame_desc[i].actual_length)) | |
1363 | return -EFAULT; | |
1364 | if (put_user(urb->iso_frame_desc[i].status, | |
1365 | &userurb->iso_frame_desc[i].status)) | |
1366 | return -EFAULT; | |
1367 | } | |
1da177e4 LT |
1368 | } |
1369 | ||
1370 | free_async(as); | |
c714de5d | 1371 | if (put_user(ptr_to_compat(addr), (u32 __user *)arg)) |
1da177e4 LT |
1372 | return -EFAULT; |
1373 | return 0; | |
1374 | } | |
1375 | ||
1376 | static int proc_reapurb_compat(struct dev_state *ps, void __user *arg) | |
1377 | { | |
1378 | struct async *as = reap_as(ps); | |
1379 | if (as) | |
1380 | return processcompl_compat(as, (void __user * __user *)arg); | |
1381 | if (signal_pending(current)) | |
1382 | return -EINTR; | |
1383 | return -EIO; | |
1384 | } | |
1385 | ||
1386 | static int proc_reapurbnonblock_compat(struct dev_state *ps, void __user *arg) | |
1387 | { | |
1388 | struct async *as; | |
1389 | ||
1da177e4 LT |
1390 | if (!(as = async_getcompleted(ps))) |
1391 | return -EAGAIN; | |
1da177e4 LT |
1392 | return processcompl_compat(as, (void __user * __user *)arg); |
1393 | } | |
1394 | ||
1395 | #endif | |
1396 | ||
1397 | static int proc_disconnectsignal(struct dev_state *ps, void __user *arg) | |
1398 | { | |
1399 | struct usbdevfs_disconnectsignal ds; | |
1400 | ||
1401 | if (copy_from_user(&ds, arg, sizeof(ds))) | |
1402 | return -EFAULT; | |
1da177e4 LT |
1403 | ps->discsignr = ds.signr; |
1404 | ps->disccontext = ds.context; | |
1405 | return 0; | |
1406 | } | |
1407 | ||
1408 | static int proc_claiminterface(struct dev_state *ps, void __user *arg) | |
1409 | { | |
1410 | unsigned int ifnum; | |
1411 | ||
1412 | if (get_user(ifnum, (unsigned int __user *)arg)) | |
1413 | return -EFAULT; | |
1414 | return claimintf(ps, ifnum); | |
1415 | } | |
1416 | ||
1417 | static int proc_releaseinterface(struct dev_state *ps, void __user *arg) | |
1418 | { | |
1419 | unsigned int ifnum; | |
1420 | int ret; | |
1421 | ||
1422 | if (get_user(ifnum, (unsigned int __user *)arg)) | |
1423 | return -EFAULT; | |
1424 | if ((ret = releaseintf(ps, ifnum)) < 0) | |
1425 | return ret; | |
1426 | destroy_async_on_interface (ps, ifnum); | |
1427 | return 0; | |
1428 | } | |
1429 | ||
c36fc889 | 1430 | static int proc_ioctl(struct dev_state *ps, struct usbdevfs_ioctl *ctl) |
1da177e4 | 1431 | { |
1da177e4 LT |
1432 | int size; |
1433 | void *buf = NULL; | |
1434 | int retval = 0; | |
1435 | struct usb_interface *intf = NULL; | |
1436 | struct usb_driver *driver = NULL; | |
1da177e4 | 1437 | |
c36fc889 | 1438 | /* alloc buffer */ |
04e482ff GKH |
1439 | if ((size = _IOC_SIZE(ctl->ioctl_code)) > 0) { |
1440 | if ((buf = kmalloc(size, GFP_KERNEL)) == NULL) | |
1da177e4 | 1441 | return -ENOMEM; |
c36fc889 | 1442 | if ((_IOC_DIR(ctl->ioctl_code) & _IOC_WRITE)) { |
04e482ff | 1443 | if (copy_from_user(buf, ctl->data, size)) { |
6fd19f4b | 1444 | kfree(buf); |
1da177e4 LT |
1445 | return -EFAULT; |
1446 | } | |
1447 | } else { | |
04e482ff | 1448 | memset(buf, 0, size); |
1da177e4 LT |
1449 | } |
1450 | } | |
1451 | ||
349710c3 | 1452 | if (!connected(ps)) { |
6fd19f4b | 1453 | kfree(buf); |
1da177e4 LT |
1454 | return -ENODEV; |
1455 | } | |
1456 | ||
1457 | if (ps->dev->state != USB_STATE_CONFIGURED) | |
1458 | retval = -EHOSTUNREACH; | |
04e482ff GKH |
1459 | else if (!(intf = usb_ifnum_to_if(ps->dev, ctl->ifno))) |
1460 | retval = -EINVAL; | |
c36fc889 | 1461 | else switch (ctl->ioctl_code) { |
1da177e4 LT |
1462 | |
1463 | /* disconnect kernel driver from interface */ | |
1464 | case USBDEVFS_DISCONNECT: | |
1da177e4 LT |
1465 | if (intf->dev.driver) { |
1466 | driver = to_usb_driver(intf->dev.driver); | |
04e482ff | 1467 | dev_dbg(&intf->dev, "disconnect by usbfs\n"); |
1da177e4 LT |
1468 | usb_driver_release_interface(driver, intf); |
1469 | } else | |
1470 | retval = -ENODATA; | |
1da177e4 LT |
1471 | break; |
1472 | ||
1473 | /* let kernel drivers try to (re)bind to the interface */ | |
1474 | case USBDEVFS_CONNECT: | |
885e9747 AS |
1475 | if (!intf->dev.driver) |
1476 | retval = device_attach(&intf->dev); | |
1477 | else | |
1478 | retval = -EBUSY; | |
1da177e4 LT |
1479 | break; |
1480 | ||
1481 | /* talk directly to the interface's driver */ | |
1482 | default: | |
1da177e4 LT |
1483 | if (intf->dev.driver) |
1484 | driver = to_usb_driver(intf->dev.driver); | |
1485 | if (driver == NULL || driver->ioctl == NULL) { | |
1486 | retval = -ENOTTY; | |
1487 | } else { | |
04e482ff | 1488 | retval = driver->ioctl(intf, ctl->ioctl_code, buf); |
1da177e4 LT |
1489 | if (retval == -ENOIOCTLCMD) |
1490 | retval = -ENOTTY; | |
1491 | } | |
1da177e4 LT |
1492 | } |
1493 | ||
1494 | /* cleanup and return */ | |
1495 | if (retval >= 0 | |
04e482ff | 1496 | && (_IOC_DIR(ctl->ioctl_code) & _IOC_READ) != 0 |
1da177e4 | 1497 | && size > 0 |
04e482ff | 1498 | && copy_to_user(ctl->data, buf, size) != 0) |
1da177e4 | 1499 | retval = -EFAULT; |
6fd19f4b JJ |
1500 | |
1501 | kfree(buf); | |
1da177e4 LT |
1502 | return retval; |
1503 | } | |
1504 | ||
c36fc889 PZ |
1505 | static int proc_ioctl_default(struct dev_state *ps, void __user *arg) |
1506 | { | |
1507 | struct usbdevfs_ioctl ctrl; | |
1508 | ||
04e482ff | 1509 | if (copy_from_user(&ctrl, arg, sizeof(ctrl))) |
c36fc889 PZ |
1510 | return -EFAULT; |
1511 | return proc_ioctl(ps, &ctrl); | |
1512 | } | |
1513 | ||
1514 | #ifdef CONFIG_COMPAT | |
777da590 | 1515 | static int proc_ioctl_compat(struct dev_state *ps, compat_uptr_t arg) |
c36fc889 PZ |
1516 | { |
1517 | struct usbdevfs_ioctl32 __user *uioc; | |
1518 | struct usbdevfs_ioctl ctrl; | |
1519 | u32 udata; | |
1520 | ||
058120d7 | 1521 | uioc = compat_ptr((long)arg); |
c36fc889 PZ |
1522 | if (get_user(ctrl.ifno, &uioc->ifno) || |
1523 | get_user(ctrl.ioctl_code, &uioc->ioctl_code) || | |
1524 | __get_user(udata, &uioc->data)) | |
1525 | return -EFAULT; | |
1526 | ctrl.data = compat_ptr(udata); | |
1527 | ||
1528 | return proc_ioctl(ps, &ctrl); | |
1529 | } | |
1530 | #endif | |
1531 | ||
1da177e4 LT |
1532 | /* |
1533 | * NOTE: All requests here that have interface numbers as parameters | |
1534 | * are assuming that somehow the configuration has been prevented from | |
1535 | * changing. But there's no mechanism to ensure that... | |
1536 | */ | |
04e482ff GKH |
1537 | static int usbdev_ioctl(struct inode *inode, struct file *file, |
1538 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 1539 | { |
ec17cf1c | 1540 | struct dev_state *ps = file->private_data; |
1da177e4 LT |
1541 | struct usb_device *dev = ps->dev; |
1542 | void __user *p = (void __user *)arg; | |
1543 | int ret = -ENOTTY; | |
1544 | ||
1545 | if (!(file->f_mode & FMODE_WRITE)) | |
1546 | return -EPERM; | |
1547 | usb_lock_device(dev); | |
349710c3 | 1548 | if (!connected(ps)) { |
1da177e4 LT |
1549 | usb_unlock_device(dev); |
1550 | return -ENODEV; | |
1551 | } | |
1552 | ||
1553 | switch (cmd) { | |
1554 | case USBDEVFS_CONTROL: | |
441b62c1 | 1555 | snoop(&dev->dev, "%s: CONTROL\n", __func__); |
1da177e4 LT |
1556 | ret = proc_control(ps, p); |
1557 | if (ret >= 0) | |
1558 | inode->i_mtime = CURRENT_TIME; | |
1559 | break; | |
1560 | ||
1561 | case USBDEVFS_BULK: | |
441b62c1 | 1562 | snoop(&dev->dev, "%s: BULK\n", __func__); |
1da177e4 LT |
1563 | ret = proc_bulk(ps, p); |
1564 | if (ret >= 0) | |
1565 | inode->i_mtime = CURRENT_TIME; | |
1566 | break; | |
1567 | ||
1568 | case USBDEVFS_RESETEP: | |
441b62c1 | 1569 | snoop(&dev->dev, "%s: RESETEP\n", __func__); |
1da177e4 LT |
1570 | ret = proc_resetep(ps, p); |
1571 | if (ret >= 0) | |
1572 | inode->i_mtime = CURRENT_TIME; | |
1573 | break; | |
1574 | ||
1575 | case USBDEVFS_RESET: | |
441b62c1 | 1576 | snoop(&dev->dev, "%s: RESET\n", __func__); |
1da177e4 LT |
1577 | ret = proc_resetdevice(ps); |
1578 | break; | |
1579 | ||
1580 | case USBDEVFS_CLEAR_HALT: | |
441b62c1 | 1581 | snoop(&dev->dev, "%s: CLEAR_HALT\n", __func__); |
1da177e4 LT |
1582 | ret = proc_clearhalt(ps, p); |
1583 | if (ret >= 0) | |
1584 | inode->i_mtime = CURRENT_TIME; | |
1585 | break; | |
1586 | ||
1587 | case USBDEVFS_GETDRIVER: | |
441b62c1 | 1588 | snoop(&dev->dev, "%s: GETDRIVER\n", __func__); |
1da177e4 LT |
1589 | ret = proc_getdriver(ps, p); |
1590 | break; | |
1591 | ||
1592 | case USBDEVFS_CONNECTINFO: | |
441b62c1 | 1593 | snoop(&dev->dev, "%s: CONNECTINFO\n", __func__); |
1da177e4 LT |
1594 | ret = proc_connectinfo(ps, p); |
1595 | break; | |
1596 | ||
1597 | case USBDEVFS_SETINTERFACE: | |
441b62c1 | 1598 | snoop(&dev->dev, "%s: SETINTERFACE\n", __func__); |
1da177e4 LT |
1599 | ret = proc_setintf(ps, p); |
1600 | break; | |
1601 | ||
1602 | case USBDEVFS_SETCONFIGURATION: | |
441b62c1 | 1603 | snoop(&dev->dev, "%s: SETCONFIGURATION\n", __func__); |
1da177e4 LT |
1604 | ret = proc_setconfig(ps, p); |
1605 | break; | |
1606 | ||
1607 | case USBDEVFS_SUBMITURB: | |
441b62c1 | 1608 | snoop(&dev->dev, "%s: SUBMITURB\n", __func__); |
1da177e4 LT |
1609 | ret = proc_submiturb(ps, p); |
1610 | if (ret >= 0) | |
1611 | inode->i_mtime = CURRENT_TIME; | |
1612 | break; | |
1613 | ||
1614 | #ifdef CONFIG_COMPAT | |
1615 | ||
1616 | case USBDEVFS_SUBMITURB32: | |
441b62c1 | 1617 | snoop(&dev->dev, "%s: SUBMITURB32\n", __func__); |
1da177e4 LT |
1618 | ret = proc_submiturb_compat(ps, p); |
1619 | if (ret >= 0) | |
1620 | inode->i_mtime = CURRENT_TIME; | |
1621 | break; | |
1622 | ||
1623 | case USBDEVFS_REAPURB32: | |
441b62c1 | 1624 | snoop(&dev->dev, "%s: REAPURB32\n", __func__); |
1da177e4 LT |
1625 | ret = proc_reapurb_compat(ps, p); |
1626 | break; | |
1627 | ||
1628 | case USBDEVFS_REAPURBNDELAY32: | |
441b62c1 | 1629 | snoop(&dev->dev, "%s: REAPURBDELAY32\n", __func__); |
1da177e4 LT |
1630 | ret = proc_reapurbnonblock_compat(ps, p); |
1631 | break; | |
1632 | ||
c36fc889 | 1633 | case USBDEVFS_IOCTL32: |
441b62c1 | 1634 | snoop(&dev->dev, "%s: IOCTL\n", __func__); |
c714de5d | 1635 | ret = proc_ioctl_compat(ps, ptr_to_compat(p)); |
c36fc889 | 1636 | break; |
1da177e4 LT |
1637 | #endif |
1638 | ||
1639 | case USBDEVFS_DISCARDURB: | |
441b62c1 | 1640 | snoop(&dev->dev, "%s: DISCARDURB\n", __func__); |
1da177e4 LT |
1641 | ret = proc_unlinkurb(ps, p); |
1642 | break; | |
1643 | ||
1644 | case USBDEVFS_REAPURB: | |
441b62c1 | 1645 | snoop(&dev->dev, "%s: REAPURB\n", __func__); |
1da177e4 LT |
1646 | ret = proc_reapurb(ps, p); |
1647 | break; | |
1648 | ||
1649 | case USBDEVFS_REAPURBNDELAY: | |
441b62c1 | 1650 | snoop(&dev->dev, "%s: REAPURBDELAY\n", __func__); |
1da177e4 LT |
1651 | ret = proc_reapurbnonblock(ps, p); |
1652 | break; | |
1653 | ||
1654 | case USBDEVFS_DISCSIGNAL: | |
441b62c1 | 1655 | snoop(&dev->dev, "%s: DISCSIGNAL\n", __func__); |
1da177e4 LT |
1656 | ret = proc_disconnectsignal(ps, p); |
1657 | break; | |
1658 | ||
1659 | case USBDEVFS_CLAIMINTERFACE: | |
441b62c1 | 1660 | snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __func__); |
1da177e4 LT |
1661 | ret = proc_claiminterface(ps, p); |
1662 | break; | |
1663 | ||
1664 | case USBDEVFS_RELEASEINTERFACE: | |
441b62c1 | 1665 | snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __func__); |
1da177e4 LT |
1666 | ret = proc_releaseinterface(ps, p); |
1667 | break; | |
1668 | ||
1669 | case USBDEVFS_IOCTL: | |
441b62c1 | 1670 | snoop(&dev->dev, "%s: IOCTL\n", __func__); |
c36fc889 | 1671 | ret = proc_ioctl_default(ps, p); |
1da177e4 LT |
1672 | break; |
1673 | } | |
1674 | usb_unlock_device(dev); | |
1675 | if (ret >= 0) | |
1676 | inode->i_atime = CURRENT_TIME; | |
1677 | return ret; | |
1678 | } | |
1679 | ||
1680 | /* No kernel lock - fine */ | |
04e482ff GKH |
1681 | static unsigned int usbdev_poll(struct file *file, |
1682 | struct poll_table_struct *wait) | |
1da177e4 | 1683 | { |
ec17cf1c TK |
1684 | struct dev_state *ps = file->private_data; |
1685 | unsigned int mask = 0; | |
1da177e4 LT |
1686 | |
1687 | poll_wait(file, &ps->wait, wait); | |
1688 | if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed)) | |
1689 | mask |= POLLOUT | POLLWRNORM; | |
349710c3 | 1690 | if (!connected(ps)) |
1da177e4 LT |
1691 | mask |= POLLERR | POLLHUP; |
1692 | return mask; | |
1693 | } | |
1694 | ||
9f8b17e6 | 1695 | const struct file_operations usbdev_file_operations = { |
7e7654a9 | 1696 | .owner = THIS_MODULE, |
1da177e4 LT |
1697 | .llseek = usbdev_lseek, |
1698 | .read = usbdev_read, | |
1699 | .poll = usbdev_poll, | |
1700 | .ioctl = usbdev_ioctl, | |
1701 | .open = usbdev_open, | |
1702 | .release = usbdev_release, | |
1703 | }; | |
fbf82fd2 | 1704 | |
501950d8 | 1705 | static void usbdev_remove(struct usb_device *udev) |
cd9f0375 AS |
1706 | { |
1707 | struct dev_state *ps; | |
1708 | struct siginfo sinfo; | |
1709 | ||
1710 | while (!list_empty(&udev->filelist)) { | |
1711 | ps = list_entry(udev->filelist.next, struct dev_state, list); | |
1712 | destroy_all_async(ps); | |
1713 | wake_up_all(&ps->wait); | |
1714 | list_del_init(&ps->list); | |
1715 | if (ps->discsignr) { | |
1716 | sinfo.si_signo = ps->discsignr; | |
1717 | sinfo.si_errno = EPIPE; | |
1718 | sinfo.si_code = SI_ASYNCIO; | |
1719 | sinfo.si_addr = ps->disccontext; | |
1720 | kill_pid_info_as_uid(ps->discsignr, &sinfo, | |
1721 | ps->disc_pid, ps->disc_uid, | |
1722 | ps->disc_euid, ps->secid); | |
1723 | } | |
1724 | } | |
1725 | } | |
1726 | ||
9f8b17e6 KS |
1727 | #ifdef CONFIG_USB_DEVICE_CLASS |
1728 | static struct class *usb_classdev_class; | |
1729 | ||
1730 | static int usb_classdev_add(struct usb_device *dev) | |
fbf82fd2 | 1731 | { |
e04199b2 AS |
1732 | struct device *cldev; |
1733 | ||
b0b090e5 GKH |
1734 | cldev = device_create(usb_classdev_class, &dev->dev, dev->dev.devt, |
1735 | NULL, "usbdev%d.%d", dev->bus->busnum, | |
1736 | dev->devnum); | |
e04199b2 AS |
1737 | if (IS_ERR(cldev)) |
1738 | return PTR_ERR(cldev); | |
1739 | dev->usb_classdev = cldev; | |
27d39e26 | 1740 | return 0; |
fbf82fd2 KS |
1741 | } |
1742 | ||
9f8b17e6 | 1743 | static void usb_classdev_remove(struct usb_device *dev) |
fbf82fd2 | 1744 | { |
e04199b2 AS |
1745 | if (dev->usb_classdev) |
1746 | device_unregister(dev->usb_classdev); | |
fbf82fd2 KS |
1747 | } |
1748 | ||
501950d8 AS |
1749 | #else |
1750 | #define usb_classdev_add(dev) 0 | |
1751 | #define usb_classdev_remove(dev) do {} while (0) | |
1752 | ||
1753 | #endif | |
1754 | ||
1755 | static int usbdev_notify(struct notifier_block *self, | |
9f8b17e6 | 1756 | unsigned long action, void *dev) |
a7b986b3 GKH |
1757 | { |
1758 | switch (action) { | |
1759 | case USB_DEVICE_ADD: | |
9f8b17e6 | 1760 | if (usb_classdev_add(dev)) |
27d39e26 | 1761 | return NOTIFY_BAD; |
a7b986b3 GKH |
1762 | break; |
1763 | case USB_DEVICE_REMOVE: | |
9f8b17e6 | 1764 | usb_classdev_remove(dev); |
501950d8 | 1765 | usbdev_remove(dev); |
a7b986b3 GKH |
1766 | break; |
1767 | } | |
1768 | return NOTIFY_OK; | |
1769 | } | |
1770 | ||
1771 | static struct notifier_block usbdev_nb = { | |
501950d8 | 1772 | .notifier_call = usbdev_notify, |
a7b986b3 GKH |
1773 | }; |
1774 | ||
7e7654a9 | 1775 | static struct cdev usb_device_cdev; |
fbf82fd2 | 1776 | |
9f8b17e6 | 1777 | int __init usb_devio_init(void) |
fbf82fd2 KS |
1778 | { |
1779 | int retval; | |
1780 | ||
fad21bdf | 1781 | retval = register_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX, |
04e482ff | 1782 | "usb_device"); |
fbf82fd2 | 1783 | if (retval) { |
69a85942 | 1784 | printk(KERN_ERR "Unable to register minors for usb_device\n"); |
fbf82fd2 KS |
1785 | goto out; |
1786 | } | |
9f8b17e6 | 1787 | cdev_init(&usb_device_cdev, &usbdev_file_operations); |
fad21bdf | 1788 | retval = cdev_add(&usb_device_cdev, USB_DEVICE_DEV, USB_DEVICE_MAX); |
fbf82fd2 | 1789 | if (retval) { |
69a85942 GKH |
1790 | printk(KERN_ERR "Unable to get usb_device major %d\n", |
1791 | USB_DEVICE_MAJOR); | |
a7b986b3 | 1792 | goto error_cdev; |
fbf82fd2 | 1793 | } |
9f8b17e6 KS |
1794 | #ifdef CONFIG_USB_DEVICE_CLASS |
1795 | usb_classdev_class = class_create(THIS_MODULE, "usb_device"); | |
1796 | if (IS_ERR(usb_classdev_class)) { | |
69a85942 | 1797 | printk(KERN_ERR "Unable to register usb_device class\n"); |
9f8b17e6 KS |
1798 | retval = PTR_ERR(usb_classdev_class); |
1799 | cdev_del(&usb_device_cdev); | |
1800 | usb_classdev_class = NULL; | |
1801 | goto out; | |
fbf82fd2 | 1802 | } |
e105b8bf DW |
1803 | /* devices of this class shadow the major:minor of their parent |
1804 | * device, so clear ->dev_kobj to prevent adding duplicate entries | |
1805 | * to /sys/dev | |
1806 | */ | |
1807 | usb_classdev_class->dev_kobj = NULL; | |
9f8b17e6 | 1808 | #endif |
501950d8 | 1809 | usb_register_notify(&usbdev_nb); |
fbf82fd2 KS |
1810 | out: |
1811 | return retval; | |
a7b986b3 | 1812 | |
a7b986b3 GKH |
1813 | error_cdev: |
1814 | unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX); | |
1815 | goto out; | |
fbf82fd2 KS |
1816 | } |
1817 | ||
9f8b17e6 | 1818 | void usb_devio_cleanup(void) |
fbf82fd2 | 1819 | { |
a7b986b3 | 1820 | usb_unregister_notify(&usbdev_nb); |
501950d8 | 1821 | #ifdef CONFIG_USB_DEVICE_CLASS |
9f8b17e6 KS |
1822 | class_destroy(usb_classdev_class); |
1823 | #endif | |
fbf82fd2 | 1824 | cdev_del(&usb_device_cdev); |
fad21bdf | 1825 | unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX); |
fbf82fd2 | 1826 | } |