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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" | |
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; | |
77 | }; | |
78 | ||
1da177e4 LT |
79 | struct async { |
80 | struct list_head asynclist; | |
81 | struct dev_state *ps; | |
2425c08b | 82 | struct pid *pid; |
46113830 | 83 | uid_t uid, euid; |
1da177e4 LT |
84 | unsigned int signr; |
85 | unsigned int ifnum; | |
86 | void __user *userbuffer; | |
87 | void __user *userurb; | |
88 | struct urb *urb; | |
e015268d | 89 | int status; |
7a01955f | 90 | u32 secid; |
1da177e4 LT |
91 | }; |
92 | ||
04e482ff GKH |
93 | static int usbfs_snoop; |
94 | module_param(usbfs_snoop, bool, S_IRUGO | S_IWUSR); | |
95 | MODULE_PARM_DESC(usbfs_snoop, "true to log all usbfs traffic"); | |
1da177e4 LT |
96 | |
97 | #define snoop(dev, format, arg...) \ | |
98 | do { \ | |
99 | if (usbfs_snoop) \ | |
04e482ff | 100 | dev_info(dev , format , ## arg); \ |
1da177e4 LT |
101 | } while (0) |
102 | ||
fad21bdf AS |
103 | #define USB_DEVICE_DEV MKDEV(USB_DEVICE_MAJOR, 0) |
104 | ||
1da177e4 LT |
105 | |
106 | #define MAX_USBFS_BUFFER_SIZE 16384 | |
107 | ||
d34d9721 | 108 | static int connected(struct dev_state *ps) |
1da177e4 | 109 | { |
349710c3 AS |
110 | return (!list_empty(&ps->list) && |
111 | ps->dev->state != USB_STATE_NOTATTACHED); | |
1da177e4 LT |
112 | } |
113 | ||
114 | static loff_t usbdev_lseek(struct file *file, loff_t offset, int orig) | |
115 | { | |
116 | loff_t ret; | |
117 | ||
118 | lock_kernel(); | |
119 | ||
120 | switch (orig) { | |
121 | case 0: | |
122 | file->f_pos = offset; | |
123 | ret = file->f_pos; | |
124 | break; | |
125 | case 1: | |
126 | file->f_pos += offset; | |
127 | ret = file->f_pos; | |
128 | break; | |
129 | case 2: | |
130 | default: | |
131 | ret = -EINVAL; | |
132 | } | |
133 | ||
134 | unlock_kernel(); | |
135 | return ret; | |
136 | } | |
137 | ||
04e482ff GKH |
138 | static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes, |
139 | loff_t *ppos) | |
1da177e4 | 140 | { |
ec17cf1c | 141 | struct dev_state *ps = file->private_data; |
1da177e4 LT |
142 | struct usb_device *dev = ps->dev; |
143 | ssize_t ret = 0; | |
144 | unsigned len; | |
145 | loff_t pos; | |
146 | int i; | |
147 | ||
148 | pos = *ppos; | |
149 | usb_lock_device(dev); | |
349710c3 | 150 | if (!connected(ps)) { |
1da177e4 LT |
151 | ret = -ENODEV; |
152 | goto err; | |
153 | } else if (pos < 0) { | |
154 | ret = -EINVAL; | |
155 | goto err; | |
156 | } | |
157 | ||
158 | if (pos < sizeof(struct usb_device_descriptor)) { | |
04e482ff GKH |
159 | /* 18 bytes - fits on the stack */ |
160 | struct usb_device_descriptor temp_desc; | |
8781ba0a ON |
161 | |
162 | memcpy(&temp_desc, &dev->descriptor, sizeof(dev->descriptor)); | |
9fcd5c32 AM |
163 | le16_to_cpus(&temp_desc.bcdUSB); |
164 | le16_to_cpus(&temp_desc.idVendor); | |
165 | le16_to_cpus(&temp_desc.idProduct); | |
166 | le16_to_cpus(&temp_desc.bcdDevice); | |
1da177e4 LT |
167 | |
168 | len = sizeof(struct usb_device_descriptor) - pos; | |
169 | if (len > nbytes) | |
170 | len = nbytes; | |
8781ba0a | 171 | if (copy_to_user(buf, ((char *)&temp_desc) + pos, len)) { |
1da177e4 LT |
172 | ret = -EFAULT; |
173 | goto err; | |
174 | } | |
1da177e4 LT |
175 | |
176 | *ppos += len; | |
177 | buf += len; | |
178 | nbytes -= len; | |
179 | ret += len; | |
180 | } | |
181 | ||
182 | pos = sizeof(struct usb_device_descriptor); | |
183 | for (i = 0; nbytes && i < dev->descriptor.bNumConfigurations; i++) { | |
184 | struct usb_config_descriptor *config = | |
185 | (struct usb_config_descriptor *)dev->rawdescriptors[i]; | |
186 | unsigned int length = le16_to_cpu(config->wTotalLength); | |
187 | ||
188 | if (*ppos < pos + length) { | |
189 | ||
190 | /* The descriptor may claim to be longer than it | |
191 | * really is. Here is the actual allocated length. */ | |
192 | unsigned alloclen = | |
193 | le16_to_cpu(dev->config[i].desc.wTotalLength); | |
194 | ||
195 | len = length - (*ppos - pos); | |
196 | if (len > nbytes) | |
197 | len = nbytes; | |
198 | ||
199 | /* Simply don't write (skip over) unallocated parts */ | |
200 | if (alloclen > (*ppos - pos)) { | |
201 | alloclen -= (*ppos - pos); | |
202 | if (copy_to_user(buf, | |
203 | dev->rawdescriptors[i] + (*ppos - pos), | |
204 | min(len, alloclen))) { | |
205 | ret = -EFAULT; | |
206 | goto err; | |
207 | } | |
208 | } | |
209 | ||
210 | *ppos += len; | |
211 | buf += len; | |
212 | nbytes -= len; | |
213 | ret += len; | |
214 | } | |
215 | ||
216 | pos += length; | |
217 | } | |
218 | ||
219 | err: | |
220 | usb_unlock_device(dev); | |
221 | return ret; | |
222 | } | |
223 | ||
224 | /* | |
225 | * async list handling | |
226 | */ | |
227 | ||
228 | static struct async *alloc_async(unsigned int numisoframes) | |
229 | { | |
dd95b814 | 230 | struct async *as; |
0a1ef3b5 | 231 | |
dd95b814 | 232 | as = kzalloc(sizeof(struct async), GFP_KERNEL); |
04e482ff GKH |
233 | if (!as) |
234 | return NULL; | |
1da177e4 LT |
235 | as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL); |
236 | if (!as->urb) { | |
237 | kfree(as); | |
238 | return NULL; | |
239 | } | |
04e482ff | 240 | return as; |
1da177e4 LT |
241 | } |
242 | ||
243 | static void free_async(struct async *as) | |
244 | { | |
2425c08b | 245 | put_pid(as->pid); |
6fd19f4b JJ |
246 | kfree(as->urb->transfer_buffer); |
247 | kfree(as->urb->setup_packet); | |
1da177e4 | 248 | usb_free_urb(as->urb); |
6fd19f4b | 249 | kfree(as); |
1da177e4 LT |
250 | } |
251 | ||
d34d9721 | 252 | static void async_newpending(struct async *as) |
1da177e4 | 253 | { |
04e482ff GKH |
254 | struct dev_state *ps = as->ps; |
255 | unsigned long flags; | |
256 | ||
257 | spin_lock_irqsave(&ps->lock, flags); | |
258 | list_add_tail(&as->asynclist, &ps->async_pending); | |
259 | spin_unlock_irqrestore(&ps->lock, flags); | |
1da177e4 LT |
260 | } |
261 | ||
d34d9721 | 262 | static void async_removepending(struct async *as) |
1da177e4 | 263 | { |
04e482ff GKH |
264 | struct dev_state *ps = as->ps; |
265 | unsigned long flags; | |
266 | ||
267 | spin_lock_irqsave(&ps->lock, flags); | |
268 | list_del_init(&as->asynclist); | |
269 | spin_unlock_irqrestore(&ps->lock, flags); | |
1da177e4 LT |
270 | } |
271 | ||
d34d9721 | 272 | static struct async *async_getcompleted(struct dev_state *ps) |
1da177e4 | 273 | { |
04e482ff GKH |
274 | unsigned long flags; |
275 | struct async *as = NULL; | |
276 | ||
277 | spin_lock_irqsave(&ps->lock, flags); | |
278 | if (!list_empty(&ps->async_completed)) { | |
279 | as = list_entry(ps->async_completed.next, struct async, | |
280 | asynclist); | |
281 | list_del_init(&as->asynclist); | |
282 | } | |
283 | spin_unlock_irqrestore(&ps->lock, flags); | |
284 | return as; | |
1da177e4 LT |
285 | } |
286 | ||
d34d9721 | 287 | static struct async *async_getpending(struct dev_state *ps, |
04e482ff | 288 | void __user *userurb) |
1da177e4 | 289 | { |
04e482ff GKH |
290 | unsigned long flags; |
291 | struct async *as; | |
1da177e4 | 292 | |
04e482ff | 293 | spin_lock_irqsave(&ps->lock, flags); |
1da177e4 LT |
294 | list_for_each_entry(as, &ps->async_pending, asynclist) |
295 | if (as->userurb == userurb) { | |
296 | list_del_init(&as->asynclist); | |
297 | spin_unlock_irqrestore(&ps->lock, flags); | |
298 | return as; | |
299 | } | |
04e482ff GKH |
300 | spin_unlock_irqrestore(&ps->lock, flags); |
301 | return NULL; | |
1da177e4 LT |
302 | } |
303 | ||
e639dd3f GKH |
304 | static void snoop_urb(struct urb *urb, void __user *userurb) |
305 | { | |
71d2718f | 306 | unsigned j; |
e639dd3f GKH |
307 | unsigned char *data = urb->transfer_buffer; |
308 | ||
309 | if (!usbfs_snoop) | |
310 | return; | |
311 | ||
93cf9b90 AS |
312 | dev_info(&urb->dev->dev, "direction=%s\n", |
313 | usb_urb_dir_in(urb) ? "IN" : "OUT"); | |
e639dd3f | 314 | dev_info(&urb->dev->dev, "userurb=%p\n", userurb); |
71d2718f | 315 | dev_info(&urb->dev->dev, "transfer_buffer_length=%u\n", |
e639dd3f | 316 | urb->transfer_buffer_length); |
71d2718f | 317 | dev_info(&urb->dev->dev, "actual_length=%u\n", urb->actual_length); |
e639dd3f GKH |
318 | dev_info(&urb->dev->dev, "data: "); |
319 | for (j = 0; j < urb->transfer_buffer_length; ++j) | |
04e482ff | 320 | printk("%02x ", data[j]); |
e639dd3f GKH |
321 | printk("\n"); |
322 | } | |
323 | ||
7d12e780 | 324 | static void async_completed(struct urb *urb) |
1da177e4 | 325 | { |
04e482ff GKH |
326 | struct async *as = urb->context; |
327 | struct dev_state *ps = as->ps; | |
1da177e4 | 328 | struct siginfo sinfo; |
516a1a07 ON |
329 | struct pid *pid = NULL; |
330 | uid_t uid = 0; | |
331 | uid_t euid = 0; | |
332 | u32 secid = 0; | |
333 | int signr; | |
1da177e4 | 334 | |
04e482ff GKH |
335 | spin_lock(&ps->lock); |
336 | list_move_tail(&as->asynclist, &ps->async_completed); | |
e015268d | 337 | as->status = urb->status; |
516a1a07 ON |
338 | signr = as->signr; |
339 | if (signr) { | |
1da177e4 | 340 | sinfo.si_signo = as->signr; |
e015268d | 341 | sinfo.si_errno = as->status; |
1da177e4 LT |
342 | sinfo.si_code = SI_ASYNCIO; |
343 | sinfo.si_addr = as->userurb; | |
516a1a07 ON |
344 | pid = as->pid; |
345 | uid = as->uid; | |
346 | euid = as->euid; | |
347 | secid = as->secid; | |
1da177e4 | 348 | } |
e639dd3f GKH |
349 | snoop(&urb->dev->dev, "urb complete\n"); |
350 | snoop_urb(urb, as->userurb); | |
516a1a07 ON |
351 | spin_unlock(&ps->lock); |
352 | ||
353 | if (signr) | |
354 | kill_pid_info_as_uid(sinfo.si_signo, &sinfo, pid, uid, | |
355 | euid, secid); | |
356 | ||
e639dd3f | 357 | wake_up(&ps->wait); |
1da177e4 LT |
358 | } |
359 | ||
04e482ff | 360 | static void destroy_async(struct dev_state *ps, struct list_head *list) |
1da177e4 LT |
361 | { |
362 | struct async *as; | |
363 | unsigned long flags; | |
364 | ||
365 | spin_lock_irqsave(&ps->lock, flags); | |
366 | while (!list_empty(list)) { | |
367 | as = list_entry(list->next, struct async, asynclist); | |
368 | list_del_init(&as->asynclist); | |
369 | ||
370 | /* drop the spinlock so the completion handler can run */ | |
371 | spin_unlock_irqrestore(&ps->lock, flags); | |
372 | usb_kill_urb(as->urb); | |
373 | spin_lock_irqsave(&ps->lock, flags); | |
374 | } | |
375 | spin_unlock_irqrestore(&ps->lock, flags); | |
1da177e4 LT |
376 | } |
377 | ||
04e482ff GKH |
378 | static void destroy_async_on_interface(struct dev_state *ps, |
379 | unsigned int ifnum) | |
1da177e4 LT |
380 | { |
381 | struct list_head *p, *q, hitlist; | |
382 | unsigned long flags; | |
383 | ||
384 | INIT_LIST_HEAD(&hitlist); | |
385 | spin_lock_irqsave(&ps->lock, flags); | |
386 | list_for_each_safe(p, q, &ps->async_pending) | |
387 | if (ifnum == list_entry(p, struct async, asynclist)->ifnum) | |
388 | list_move_tail(p, &hitlist); | |
389 | spin_unlock_irqrestore(&ps->lock, flags); | |
390 | destroy_async(ps, &hitlist); | |
391 | } | |
392 | ||
d34d9721 | 393 | static void destroy_all_async(struct dev_state *ps) |
1da177e4 | 394 | { |
04e482ff | 395 | destroy_async(ps, &ps->async_pending); |
1da177e4 LT |
396 | } |
397 | ||
398 | /* | |
399 | * interface claims are made only at the request of user level code, | |
400 | * which can also release them (explicitly or by closing files). | |
401 | * they're also undone when devices disconnect. | |
402 | */ | |
403 | ||
04e482ff GKH |
404 | static int driver_probe(struct usb_interface *intf, |
405 | const struct usb_device_id *id) | |
1da177e4 LT |
406 | { |
407 | return -ENODEV; | |
408 | } | |
409 | ||
410 | static void driver_disconnect(struct usb_interface *intf) | |
411 | { | |
04e482ff | 412 | struct dev_state *ps = usb_get_intfdata(intf); |
1da177e4 LT |
413 | unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber; |
414 | ||
415 | if (!ps) | |
416 | return; | |
417 | ||
418 | /* NOTE: this relies on usbcore having canceled and completed | |
419 | * all pending I/O requests; 2.6 does that. | |
420 | */ | |
421 | ||
422 | if (likely(ifnum < 8*sizeof(ps->ifclaimed))) | |
423 | clear_bit(ifnum, &ps->ifclaimed); | |
424 | else | |
3b6004f3 GKH |
425 | dev_warn(&intf->dev, "interface number %u out of range\n", |
426 | ifnum); | |
1da177e4 | 427 | |
04e482ff | 428 | usb_set_intfdata(intf, NULL); |
1da177e4 LT |
429 | |
430 | /* force async requests to complete */ | |
431 | destroy_async_on_interface(ps, ifnum); | |
432 | } | |
433 | ||
2e2eb83f AS |
434 | /* The following routines are merely placeholders. There is no way |
435 | * to inform a user task about suspend or resumes. | |
436 | */ | |
437 | static int driver_suspend(struct usb_interface *intf, pm_message_t msg) | |
438 | { | |
439 | return 0; | |
440 | } | |
441 | ||
442 | static int driver_resume(struct usb_interface *intf) | |
443 | { | |
444 | return 0; | |
445 | } | |
446 | ||
1da177e4 | 447 | struct usb_driver usbfs_driver = { |
1da177e4 LT |
448 | .name = "usbfs", |
449 | .probe = driver_probe, | |
450 | .disconnect = driver_disconnect, | |
2e2eb83f AS |
451 | .suspend = driver_suspend, |
452 | .resume = driver_resume, | |
1da177e4 LT |
453 | }; |
454 | ||
455 | static int claimintf(struct dev_state *ps, unsigned int ifnum) | |
456 | { | |
457 | struct usb_device *dev = ps->dev; | |
458 | struct usb_interface *intf; | |
459 | int err; | |
460 | ||
461 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
462 | return -EINVAL; | |
463 | /* already claimed */ | |
464 | if (test_bit(ifnum, &ps->ifclaimed)) | |
465 | return 0; | |
466 | ||
1da177e4 LT |
467 | intf = usb_ifnum_to_if(dev, ifnum); |
468 | if (!intf) | |
469 | err = -ENOENT; | |
470 | else | |
471 | err = usb_driver_claim_interface(&usbfs_driver, intf, ps); | |
1da177e4 LT |
472 | if (err == 0) |
473 | set_bit(ifnum, &ps->ifclaimed); | |
474 | return err; | |
475 | } | |
476 | ||
477 | static int releaseintf(struct dev_state *ps, unsigned int ifnum) | |
478 | { | |
479 | struct usb_device *dev; | |
480 | struct usb_interface *intf; | |
481 | int err; | |
482 | ||
483 | err = -EINVAL; | |
484 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
485 | return err; | |
486 | dev = ps->dev; | |
1da177e4 LT |
487 | intf = usb_ifnum_to_if(dev, ifnum); |
488 | if (!intf) | |
489 | err = -ENOENT; | |
490 | else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) { | |
491 | usb_driver_release_interface(&usbfs_driver, intf); | |
492 | err = 0; | |
493 | } | |
1da177e4 LT |
494 | return err; |
495 | } | |
496 | ||
497 | static int checkintf(struct dev_state *ps, unsigned int ifnum) | |
498 | { | |
499 | if (ps->dev->state != USB_STATE_CONFIGURED) | |
500 | return -EHOSTUNREACH; | |
501 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
502 | return -EINVAL; | |
503 | if (test_bit(ifnum, &ps->ifclaimed)) | |
504 | return 0; | |
505 | /* if not yet claimed, claim it for the driver */ | |
04e482ff GKH |
506 | dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim " |
507 | "interface %u before use\n", task_pid_nr(current), | |
508 | current->comm, ifnum); | |
1da177e4 LT |
509 | return claimintf(ps, ifnum); |
510 | } | |
511 | ||
512 | static int findintfep(struct usb_device *dev, unsigned int ep) | |
513 | { | |
514 | unsigned int i, j, e; | |
04e482ff | 515 | struct usb_interface *intf; |
1da177e4 LT |
516 | struct usb_host_interface *alts; |
517 | struct usb_endpoint_descriptor *endpt; | |
518 | ||
519 | if (ep & ~(USB_DIR_IN|0xf)) | |
520 | return -EINVAL; | |
521 | if (!dev->actconfig) | |
522 | return -ESRCH; | |
523 | for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) { | |
524 | intf = dev->actconfig->interface[i]; | |
525 | for (j = 0; j < intf->num_altsetting; j++) { | |
04e482ff | 526 | alts = &intf->altsetting[j]; |
1da177e4 LT |
527 | for (e = 0; e < alts->desc.bNumEndpoints; e++) { |
528 | endpt = &alts->endpoint[e].desc; | |
529 | if (endpt->bEndpointAddress == ep) | |
530 | return alts->desc.bInterfaceNumber; | |
531 | } | |
532 | } | |
533 | } | |
04e482ff | 534 | return -ENOENT; |
1da177e4 LT |
535 | } |
536 | ||
04e482ff GKH |
537 | static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype, |
538 | unsigned int index) | |
1da177e4 LT |
539 | { |
540 | int ret = 0; | |
541 | ||
6da9c990 DV |
542 | if (ps->dev->state != USB_STATE_UNAUTHENTICATED |
543 | && ps->dev->state != USB_STATE_ADDRESS | |
24f8b116 | 544 | && ps->dev->state != USB_STATE_CONFIGURED) |
1da177e4 LT |
545 | return -EHOSTUNREACH; |
546 | if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype)) | |
547 | return 0; | |
548 | ||
549 | index &= 0xff; | |
550 | switch (requesttype & USB_RECIP_MASK) { | |
551 | case USB_RECIP_ENDPOINT: | |
04e482ff GKH |
552 | ret = findintfep(ps->dev, index); |
553 | if (ret >= 0) | |
1da177e4 LT |
554 | ret = checkintf(ps, ret); |
555 | break; | |
556 | ||
557 | case USB_RECIP_INTERFACE: | |
558 | ret = checkintf(ps, index); | |
559 | break; | |
560 | } | |
561 | return ret; | |
562 | } | |
563 | ||
61ad04a8 | 564 | static int match_devt(struct device *dev, void *data) |
4592bf5a | 565 | { |
a80d5ff0 | 566 | return dev->devt == (dev_t) (unsigned long) data; |
9f8b17e6 | 567 | } |
4592bf5a | 568 | |
61ad04a8 | 569 | static struct usb_device *usbdev_lookup_by_devt(dev_t devt) |
9f8b17e6 KS |
570 | { |
571 | struct device *dev; | |
572 | ||
a80d5ff0 DH |
573 | dev = bus_find_device(&usb_bus_type, NULL, |
574 | (void *) (unsigned long) devt, match_devt); | |
9f8b17e6 KS |
575 | if (!dev) |
576 | return NULL; | |
9f8b17e6 KS |
577 | return container_of(dev, struct usb_device, dev); |
578 | } | |
4592bf5a | 579 | |
1da177e4 LT |
580 | /* |
581 | * file operations | |
582 | */ | |
583 | static int usbdev_open(struct inode *inode, struct file *file) | |
584 | { | |
fbf82fd2 | 585 | struct usb_device *dev = NULL; |
1da177e4 | 586 | struct dev_state *ps; |
86a264ab | 587 | const struct cred *cred = current_cred(); |
1da177e4 LT |
588 | int ret; |
589 | ||
b5b4aa67 | 590 | lock_kernel(); |
4a2a8a2c AS |
591 | /* Protect against simultaneous removal or release */ |
592 | mutex_lock(&usbfs_mutex); | |
593 | ||
1da177e4 | 594 | ret = -ENOMEM; |
04e482ff GKH |
595 | ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL); |
596 | if (!ps) | |
4a2a8a2c | 597 | goto out; |
1da177e4 | 598 | |
01105a24 | 599 | ret = -ENODEV; |
61ad04a8 | 600 | |
9f8b17e6 | 601 | /* usbdev device-node */ |
fbf82fd2 | 602 | if (imajor(inode) == USB_DEVICE_MAJOR) |
61ad04a8 | 603 | dev = usbdev_lookup_by_devt(inode->i_rdev); |
9f8b17e6 KS |
604 | #ifdef CONFIG_USB_DEVICEFS |
605 | /* procfs file */ | |
d64aac36 | 606 | if (!dev) { |
8e18e294 | 607 | dev = inode->i_private; |
d64aac36 AS |
608 | if (dev && dev->usbfs_dentry && |
609 | dev->usbfs_dentry->d_inode == inode) | |
610 | usb_get_dev(dev); | |
611 | else | |
612 | dev = NULL; | |
613 | } | |
9f8b17e6 | 614 | #endif |
d64aac36 | 615 | if (!dev || dev->state == USB_STATE_NOTATTACHED) |
1da177e4 | 616 | goto out; |
94fcda1f | 617 | ret = usb_autoresume_device(dev); |
01d883d4 AS |
618 | if (ret) |
619 | goto out; | |
620 | ||
1da177e4 LT |
621 | ret = 0; |
622 | ps->dev = dev; | |
623 | ps->file = file; | |
624 | spin_lock_init(&ps->lock); | |
316547fd | 625 | INIT_LIST_HEAD(&ps->list); |
1da177e4 LT |
626 | INIT_LIST_HEAD(&ps->async_pending); |
627 | INIT_LIST_HEAD(&ps->async_completed); | |
628 | init_waitqueue_head(&ps->wait); | |
629 | ps->discsignr = 0; | |
2425c08b | 630 | ps->disc_pid = get_pid(task_pid(current)); |
86a264ab DH |
631 | ps->disc_uid = cred->uid; |
632 | ps->disc_euid = cred->euid; | |
1da177e4 LT |
633 | ps->disccontext = NULL; |
634 | ps->ifclaimed = 0; | |
7a01955f | 635 | security_task_getsecid(current, &ps->secid); |
527660a8 | 636 | smp_wmb(); |
1da177e4 LT |
637 | list_add_tail(&ps->list, &dev->filelist); |
638 | file->private_data = ps; | |
2da41d5f AS |
639 | snoop(&dev->dev, "opened by process %d: %s\n", task_pid_nr(current), |
640 | current->comm); | |
1da177e4 | 641 | out: |
d64aac36 | 642 | if (ret) { |
01d883d4 | 643 | kfree(ps); |
d64aac36 AS |
644 | usb_put_dev(dev); |
645 | } | |
4a2a8a2c | 646 | mutex_unlock(&usbfs_mutex); |
b5b4aa67 | 647 | unlock_kernel(); |
4a2a8a2c | 648 | return ret; |
1da177e4 LT |
649 | } |
650 | ||
651 | static int usbdev_release(struct inode *inode, struct file *file) | |
652 | { | |
ec17cf1c | 653 | struct dev_state *ps = file->private_data; |
1da177e4 LT |
654 | struct usb_device *dev = ps->dev; |
655 | unsigned int ifnum; | |
6ff10464 | 656 | struct async *as; |
1da177e4 LT |
657 | |
658 | usb_lock_device(dev); | |
7cbe5dca | 659 | usb_hub_release_all_ports(dev, ps); |
4a2a8a2c AS |
660 | |
661 | /* Protect against simultaneous open */ | |
662 | mutex_lock(&usbfs_mutex); | |
1da177e4 | 663 | list_del_init(&ps->list); |
4a2a8a2c AS |
664 | mutex_unlock(&usbfs_mutex); |
665 | ||
1da177e4 LT |
666 | for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed); |
667 | ifnum++) { | |
668 | if (test_bit(ifnum, &ps->ifclaimed)) | |
669 | releaseintf(ps, ifnum); | |
670 | } | |
671 | destroy_all_async(ps); | |
94fcda1f | 672 | usb_autosuspend_device(dev); |
1da177e4 LT |
673 | usb_unlock_device(dev); |
674 | usb_put_dev(dev); | |
2425c08b | 675 | put_pid(ps->disc_pid); |
6ff10464 AS |
676 | |
677 | as = async_getcompleted(ps); | |
678 | while (as) { | |
679 | free_async(as); | |
680 | as = async_getcompleted(ps); | |
681 | } | |
1da177e4 | 682 | kfree(ps); |
4a2a8a2c | 683 | return 0; |
1da177e4 LT |
684 | } |
685 | ||
686 | static int proc_control(struct dev_state *ps, void __user *arg) | |
687 | { | |
688 | struct usb_device *dev = ps->dev; | |
689 | struct usbdevfs_ctrltransfer ctrl; | |
690 | unsigned int tmo; | |
691 | unsigned char *tbuf; | |
ff66e3ce | 692 | unsigned wLength; |
1da177e4 LT |
693 | int i, j, ret; |
694 | ||
695 | if (copy_from_user(&ctrl, arg, sizeof(ctrl))) | |
696 | return -EFAULT; | |
04e482ff GKH |
697 | ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.wIndex); |
698 | if (ret) | |
1da177e4 | 699 | return ret; |
ff66e3ce AM |
700 | wLength = ctrl.wLength; /* To suppress 64k PAGE_SIZE warning */ |
701 | if (wLength > PAGE_SIZE) | |
1da177e4 | 702 | return -EINVAL; |
04e482ff GKH |
703 | tbuf = (unsigned char *)__get_free_page(GFP_KERNEL); |
704 | if (!tbuf) | |
1da177e4 LT |
705 | return -ENOMEM; |
706 | tmo = ctrl.timeout; | |
707 | if (ctrl.bRequestType & 0x80) { | |
04e482ff GKH |
708 | if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data, |
709 | ctrl.wLength)) { | |
1da177e4 LT |
710 | free_page((unsigned long)tbuf); |
711 | return -EINVAL; | |
712 | } | |
fe0410c7 AS |
713 | snoop(&dev->dev, "control read: bRequest=%02x " |
714 | "bRrequestType=%02x wValue=%04x " | |
715 | "wIndex=%04x wLength=%04x\n", | |
716 | ctrl.bRequest, ctrl.bRequestType, ctrl.wValue, | |
717 | ctrl.wIndex, ctrl.wLength); | |
1da177e4 LT |
718 | |
719 | usb_unlock_device(dev); | |
04e482ff GKH |
720 | i = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), ctrl.bRequest, |
721 | ctrl.bRequestType, ctrl.wValue, ctrl.wIndex, | |
722 | tbuf, ctrl.wLength, tmo); | |
1da177e4 LT |
723 | usb_lock_device(dev); |
724 | if ((i > 0) && ctrl.wLength) { | |
725 | if (usbfs_snoop) { | |
726 | dev_info(&dev->dev, "control read: data "); | |
fe0410c7 | 727 | for (j = 0; j < i; ++j) |
04e482ff | 728 | printk("%02x ", (u8)(tbuf)[j]); |
1da177e4 LT |
729 | printk("\n"); |
730 | } | |
fe0410c7 | 731 | if (copy_to_user(ctrl.data, tbuf, i)) { |
1da177e4 LT |
732 | free_page((unsigned long)tbuf); |
733 | return -EFAULT; | |
734 | } | |
735 | } | |
736 | } else { | |
737 | if (ctrl.wLength) { | |
738 | if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) { | |
739 | free_page((unsigned long)tbuf); | |
740 | return -EFAULT; | |
741 | } | |
742 | } | |
fe0410c7 AS |
743 | snoop(&dev->dev, "control write: bRequest=%02x " |
744 | "bRrequestType=%02x wValue=%04x " | |
745 | "wIndex=%04x wLength=%04x\n", | |
746 | ctrl.bRequest, ctrl.bRequestType, ctrl.wValue, | |
747 | ctrl.wIndex, ctrl.wLength); | |
1da177e4 LT |
748 | if (usbfs_snoop) { |
749 | dev_info(&dev->dev, "control write: data: "); | |
750 | for (j = 0; j < ctrl.wLength; ++j) | |
e639dd3f | 751 | printk("%02x ", (unsigned char)(tbuf)[j]); |
1da177e4 LT |
752 | printk("\n"); |
753 | } | |
754 | usb_unlock_device(dev); | |
04e482ff GKH |
755 | i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest, |
756 | ctrl.bRequestType, ctrl.wValue, ctrl.wIndex, | |
757 | tbuf, ctrl.wLength, tmo); | |
1da177e4 LT |
758 | usb_lock_device(dev); |
759 | } | |
760 | free_page((unsigned long)tbuf); | |
04e482ff | 761 | if (i < 0 && i != -EPIPE) { |
1da177e4 LT |
762 | dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL " |
763 | "failed cmd %s rqt %u rq %u len %u ret %d\n", | |
764 | current->comm, ctrl.bRequestType, ctrl.bRequest, | |
765 | ctrl.wLength, i); | |
766 | } | |
767 | return i; | |
768 | } | |
769 | ||
770 | static int proc_bulk(struct dev_state *ps, void __user *arg) | |
771 | { | |
772 | struct usb_device *dev = ps->dev; | |
773 | struct usbdevfs_bulktransfer bulk; | |
774 | unsigned int tmo, len1, pipe; | |
775 | int len2; | |
776 | unsigned char *tbuf; | |
e639dd3f | 777 | int i, j, ret; |
1da177e4 LT |
778 | |
779 | if (copy_from_user(&bulk, arg, sizeof(bulk))) | |
780 | return -EFAULT; | |
04e482ff GKH |
781 | ret = findintfep(ps->dev, bulk.ep); |
782 | if (ret < 0) | |
1da177e4 | 783 | return ret; |
04e482ff GKH |
784 | ret = checkintf(ps, ret); |
785 | if (ret) | |
1da177e4 LT |
786 | return ret; |
787 | if (bulk.ep & USB_DIR_IN) | |
788 | pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f); | |
789 | else | |
790 | pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f); | |
791 | if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN))) | |
792 | return -EINVAL; | |
793 | len1 = bulk.len; | |
794 | if (len1 > MAX_USBFS_BUFFER_SIZE) | |
795 | return -EINVAL; | |
796 | if (!(tbuf = kmalloc(len1, GFP_KERNEL))) | |
797 | return -ENOMEM; | |
798 | tmo = bulk.timeout; | |
799 | if (bulk.ep & 0x80) { | |
800 | if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) { | |
801 | kfree(tbuf); | |
802 | return -EINVAL; | |
803 | } | |
e639dd3f GKH |
804 | snoop(&dev->dev, "bulk read: len=0x%02x timeout=%04d\n", |
805 | bulk.len, bulk.timeout); | |
1da177e4 LT |
806 | usb_unlock_device(dev); |
807 | i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo); | |
808 | usb_lock_device(dev); | |
809 | if (!i && len2) { | |
e639dd3f GKH |
810 | if (usbfs_snoop) { |
811 | dev_info(&dev->dev, "bulk read: data "); | |
812 | for (j = 0; j < len2; ++j) | |
04e482ff | 813 | printk("%02x ", (u8)(tbuf)[j]); |
e639dd3f GKH |
814 | printk("\n"); |
815 | } | |
1da177e4 LT |
816 | if (copy_to_user(bulk.data, tbuf, len2)) { |
817 | kfree(tbuf); | |
818 | return -EFAULT; | |
819 | } | |
820 | } | |
821 | } else { | |
822 | if (len1) { | |
823 | if (copy_from_user(tbuf, bulk.data, len1)) { | |
824 | kfree(tbuf); | |
825 | return -EFAULT; | |
826 | } | |
827 | } | |
e639dd3f GKH |
828 | snoop(&dev->dev, "bulk write: len=0x%02x timeout=%04d\n", |
829 | bulk.len, bulk.timeout); | |
830 | if (usbfs_snoop) { | |
831 | dev_info(&dev->dev, "bulk write: data: "); | |
832 | for (j = 0; j < len1; ++j) | |
833 | printk("%02x ", (unsigned char)(tbuf)[j]); | |
834 | printk("\n"); | |
835 | } | |
1da177e4 LT |
836 | usb_unlock_device(dev); |
837 | i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo); | |
838 | usb_lock_device(dev); | |
839 | } | |
840 | kfree(tbuf); | |
841 | if (i < 0) | |
842 | return i; | |
843 | return len2; | |
844 | } | |
845 | ||
846 | static int proc_resetep(struct dev_state *ps, void __user *arg) | |
847 | { | |
848 | unsigned int ep; | |
849 | int ret; | |
850 | ||
851 | if (get_user(ep, (unsigned int __user *)arg)) | |
852 | return -EFAULT; | |
04e482ff GKH |
853 | ret = findintfep(ps->dev, ep); |
854 | if (ret < 0) | |
1da177e4 | 855 | return ret; |
04e482ff GKH |
856 | ret = checkintf(ps, ret); |
857 | if (ret) | |
1da177e4 | 858 | return ret; |
3444b26a | 859 | usb_reset_endpoint(ps->dev, ep); |
1da177e4 LT |
860 | return 0; |
861 | } | |
862 | ||
863 | static int proc_clearhalt(struct dev_state *ps, void __user *arg) | |
864 | { | |
865 | unsigned int ep; | |
866 | int pipe; | |
867 | int ret; | |
868 | ||
869 | if (get_user(ep, (unsigned int __user *)arg)) | |
870 | return -EFAULT; | |
04e482ff GKH |
871 | ret = findintfep(ps->dev, ep); |
872 | if (ret < 0) | |
1da177e4 | 873 | return ret; |
04e482ff GKH |
874 | ret = checkintf(ps, ret); |
875 | if (ret) | |
1da177e4 LT |
876 | return ret; |
877 | if (ep & USB_DIR_IN) | |
04e482ff GKH |
878 | pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f); |
879 | else | |
880 | pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f); | |
1da177e4 LT |
881 | |
882 | return usb_clear_halt(ps->dev, pipe); | |
883 | } | |
1da177e4 LT |
884 | |
885 | static int proc_getdriver(struct dev_state *ps, void __user *arg) | |
886 | { | |
887 | struct usbdevfs_getdriver gd; | |
888 | struct usb_interface *intf; | |
889 | int ret; | |
890 | ||
891 | if (copy_from_user(&gd, arg, sizeof(gd))) | |
892 | return -EFAULT; | |
1da177e4 LT |
893 | intf = usb_ifnum_to_if(ps->dev, gd.interface); |
894 | if (!intf || !intf->dev.driver) | |
895 | ret = -ENODATA; | |
896 | else { | |
897 | strncpy(gd.driver, intf->dev.driver->name, | |
898 | sizeof(gd.driver)); | |
899 | ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0); | |
900 | } | |
1da177e4 LT |
901 | return ret; |
902 | } | |
903 | ||
904 | static int proc_connectinfo(struct dev_state *ps, void __user *arg) | |
905 | { | |
906 | struct usbdevfs_connectinfo ci; | |
907 | ||
908 | ci.devnum = ps->dev->devnum; | |
909 | ci.slow = ps->dev->speed == USB_SPEED_LOW; | |
910 | if (copy_to_user(arg, &ci, sizeof(ci))) | |
911 | return -EFAULT; | |
912 | return 0; | |
913 | } | |
914 | ||
915 | static int proc_resetdevice(struct dev_state *ps) | |
916 | { | |
742120c6 | 917 | return usb_reset_device(ps->dev); |
1da177e4 LT |
918 | } |
919 | ||
920 | static int proc_setintf(struct dev_state *ps, void __user *arg) | |
921 | { | |
922 | struct usbdevfs_setinterface setintf; | |
923 | int ret; | |
924 | ||
925 | if (copy_from_user(&setintf, arg, sizeof(setintf))) | |
926 | return -EFAULT; | |
927 | if ((ret = checkintf(ps, setintf.interface))) | |
928 | return ret; | |
929 | return usb_set_interface(ps->dev, setintf.interface, | |
930 | setintf.altsetting); | |
931 | } | |
932 | ||
933 | static int proc_setconfig(struct dev_state *ps, void __user *arg) | |
934 | { | |
3f141e2a | 935 | int u; |
1da177e4 | 936 | int status = 0; |
04e482ff | 937 | struct usb_host_config *actconfig; |
1da177e4 | 938 | |
3f141e2a | 939 | if (get_user(u, (int __user *)arg)) |
1da177e4 LT |
940 | return -EFAULT; |
941 | ||
04e482ff GKH |
942 | actconfig = ps->dev->actconfig; |
943 | ||
944 | /* Don't touch the device if any interfaces are claimed. | |
945 | * It could interfere with other drivers' operations, and if | |
1da177e4 LT |
946 | * an interface is claimed by usbfs it could easily deadlock. |
947 | */ | |
04e482ff GKH |
948 | if (actconfig) { |
949 | int i; | |
950 | ||
951 | for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) { | |
952 | if (usb_interface_claimed(actconfig->interface[i])) { | |
953 | dev_warn(&ps->dev->dev, | |
72ebddb5 | 954 | "usbfs: interface %d claimed by %s " |
1da177e4 LT |
955 | "while '%s' sets config #%d\n", |
956 | actconfig->interface[i] | |
957 | ->cur_altsetting | |
958 | ->desc.bInterfaceNumber, | |
72ebddb5 DB |
959 | actconfig->interface[i] |
960 | ->dev.driver->name, | |
1da177e4 | 961 | current->comm, u); |
04e482ff | 962 | status = -EBUSY; |
1da177e4 | 963 | break; |
1da177e4 | 964 | } |
04e482ff GKH |
965 | } |
966 | } | |
1da177e4 LT |
967 | |
968 | /* SET_CONFIGURATION is often abused as a "cheap" driver reset, | |
969 | * so avoid usb_set_configuration()'s kick to sysfs | |
970 | */ | |
971 | if (status == 0) { | |
972 | if (actconfig && actconfig->desc.bConfigurationValue == u) | |
973 | status = usb_reset_configuration(ps->dev); | |
974 | else | |
975 | status = usb_set_configuration(ps->dev, u); | |
976 | } | |
977 | ||
978 | return status; | |
979 | } | |
980 | ||
1da177e4 | 981 | static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb, |
04e482ff GKH |
982 | struct usbdevfs_iso_packet_desc __user *iso_frame_desc, |
983 | void __user *arg) | |
1da177e4 LT |
984 | { |
985 | struct usbdevfs_iso_packet_desc *isopkt = NULL; | |
986 | struct usb_host_endpoint *ep; | |
987 | struct async *as; | |
988 | struct usb_ctrlrequest *dr = NULL; | |
86a264ab | 989 | const struct cred *cred = current_cred(); |
1da177e4 | 990 | unsigned int u, totlen, isofrmlen; |
97b9eb91 | 991 | int ret, ifnum = -1; |
93cf9b90 | 992 | int is_in; |
1da177e4 | 993 | |
14722ef4 AS |
994 | if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP | |
995 | USBDEVFS_URB_SHORT_NOT_OK | | |
996 | USBDEVFS_URB_NO_FSBR | | |
997 | USBDEVFS_URB_ZERO_PACKET | | |
998 | USBDEVFS_URB_NO_INTERRUPT)) | |
1da177e4 | 999 | return -EINVAL; |
9180135b | 1000 | if (uurb->buffer_length > 0 && !uurb->buffer) |
1da177e4 | 1001 | return -EINVAL; |
04e482ff GKH |
1002 | if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL && |
1003 | (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) { | |
1004 | ifnum = findintfep(ps->dev, uurb->endpoint); | |
1005 | if (ifnum < 0) | |
1da177e4 | 1006 | return ifnum; |
04e482ff GKH |
1007 | ret = checkintf(ps, ifnum); |
1008 | if (ret) | |
1da177e4 LT |
1009 | return ret; |
1010 | } | |
93cf9b90 AS |
1011 | if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0) { |
1012 | is_in = 1; | |
1013 | ep = ps->dev->ep_in[uurb->endpoint & USB_ENDPOINT_NUMBER_MASK]; | |
1014 | } else { | |
1015 | is_in = 0; | |
1016 | ep = ps->dev->ep_out[uurb->endpoint & USB_ENDPOINT_NUMBER_MASK]; | |
1017 | } | |
1da177e4 LT |
1018 | if (!ep) |
1019 | return -ENOENT; | |
1020 | switch(uurb->type) { | |
1021 | case USBDEVFS_URB_TYPE_CONTROL: | |
93cf9b90 | 1022 | if (!usb_endpoint_xfer_control(&ep->desc)) |
1da177e4 | 1023 | return -EINVAL; |
04e482ff GKH |
1024 | /* min 8 byte setup packet, |
1025 | * max 8 byte setup plus an arbitrary data stage */ | |
1026 | if (uurb->buffer_length < 8 || | |
1027 | uurb->buffer_length > (8 + MAX_USBFS_BUFFER_SIZE)) | |
1da177e4 | 1028 | return -EINVAL; |
04e482ff GKH |
1029 | dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL); |
1030 | if (!dr) | |
1da177e4 LT |
1031 | return -ENOMEM; |
1032 | if (copy_from_user(dr, uurb->buffer, 8)) { | |
1033 | kfree(dr); | |
1034 | return -EFAULT; | |
1035 | } | |
1036 | if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) { | |
1037 | kfree(dr); | |
1038 | return -EINVAL; | |
1039 | } | |
04e482ff GKH |
1040 | ret = check_ctrlrecip(ps, dr->bRequestType, |
1041 | le16_to_cpup(&dr->wIndex)); | |
1042 | if (ret) { | |
1da177e4 LT |
1043 | kfree(dr); |
1044 | return ret; | |
1045 | } | |
1da177e4 LT |
1046 | uurb->number_of_packets = 0; |
1047 | uurb->buffer_length = le16_to_cpup(&dr->wLength); | |
1048 | uurb->buffer += 8; | |
93cf9b90 AS |
1049 | if ((dr->bRequestType & USB_DIR_IN) && uurb->buffer_length) { |
1050 | is_in = 1; | |
1051 | uurb->endpoint |= USB_DIR_IN; | |
1052 | } else { | |
1053 | is_in = 0; | |
1054 | uurb->endpoint &= ~USB_DIR_IN; | |
1055 | } | |
df251b8b CF |
1056 | snoop(&ps->dev->dev, "control urb: bRequest=%02x " |
1057 | "bRrequestType=%02x wValue=%04x " | |
1058 | "wIndex=%04x wLength=%04x\n", | |
93cf9b90 AS |
1059 | dr->bRequest, dr->bRequestType, |
1060 | __le16_to_cpup(&dr->wValue), | |
1061 | __le16_to_cpup(&dr->wIndex), | |
1062 | __le16_to_cpup(&dr->wLength)); | |
1da177e4 LT |
1063 | break; |
1064 | ||
1065 | case USBDEVFS_URB_TYPE_BULK: | |
93cf9b90 | 1066 | switch (usb_endpoint_type(&ep->desc)) { |
1da177e4 LT |
1067 | case USB_ENDPOINT_XFER_CONTROL: |
1068 | case USB_ENDPOINT_XFER_ISOC: | |
1069 | return -EINVAL; | |
1070 | /* allow single-shot interrupt transfers, at bogus rates */ | |
1071 | } | |
1072 | uurb->number_of_packets = 0; | |
1073 | if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE) | |
1074 | return -EINVAL; | |
e639dd3f | 1075 | snoop(&ps->dev->dev, "bulk urb\n"); |
1da177e4 LT |
1076 | break; |
1077 | ||
1078 | case USBDEVFS_URB_TYPE_ISO: | |
1079 | /* arbitrary limit */ | |
04e482ff GKH |
1080 | if (uurb->number_of_packets < 1 || |
1081 | uurb->number_of_packets > 128) | |
1da177e4 | 1082 | return -EINVAL; |
93cf9b90 | 1083 | if (!usb_endpoint_xfer_isoc(&ep->desc)) |
1da177e4 | 1084 | return -EINVAL; |
04e482ff GKH |
1085 | isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * |
1086 | uurb->number_of_packets; | |
1da177e4 LT |
1087 | if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL))) |
1088 | return -ENOMEM; | |
1089 | if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) { | |
1090 | kfree(isopkt); | |
1091 | return -EFAULT; | |
1092 | } | |
1093 | for (totlen = u = 0; u < uurb->number_of_packets; u++) { | |
04e482ff GKH |
1094 | /* arbitrary limit, |
1095 | * sufficient for USB 2.0 high-bandwidth iso */ | |
3612242e | 1096 | if (isopkt[u].length > 8192) { |
1da177e4 LT |
1097 | kfree(isopkt); |
1098 | return -EINVAL; | |
1099 | } | |
1100 | totlen += isopkt[u].length; | |
1101 | } | |
1102 | if (totlen > 32768) { | |
1103 | kfree(isopkt); | |
1104 | return -EINVAL; | |
1105 | } | |
1106 | uurb->buffer_length = totlen; | |
e639dd3f | 1107 | snoop(&ps->dev->dev, "iso urb\n"); |
1da177e4 LT |
1108 | break; |
1109 | ||
1110 | case USBDEVFS_URB_TYPE_INTERRUPT: | |
1111 | uurb->number_of_packets = 0; | |
93cf9b90 | 1112 | if (!usb_endpoint_xfer_int(&ep->desc)) |
1da177e4 | 1113 | return -EINVAL; |
1da177e4 LT |
1114 | if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE) |
1115 | return -EINVAL; | |
e639dd3f | 1116 | snoop(&ps->dev->dev, "interrupt urb\n"); |
1da177e4 LT |
1117 | break; |
1118 | ||
1119 | default: | |
1120 | return -EINVAL; | |
1121 | } | |
9180135b AS |
1122 | if (uurb->buffer_length > 0 && |
1123 | !access_ok(is_in ? VERIFY_WRITE : VERIFY_READ, | |
1124 | uurb->buffer, uurb->buffer_length)) { | |
6fd19f4b JJ |
1125 | kfree(isopkt); |
1126 | kfree(dr); | |
9180135b | 1127 | return -EFAULT; |
1da177e4 | 1128 | } |
9180135b AS |
1129 | as = alloc_async(uurb->number_of_packets); |
1130 | if (!as) { | |
6fd19f4b JJ |
1131 | kfree(isopkt); |
1132 | kfree(dr); | |
1da177e4 LT |
1133 | return -ENOMEM; |
1134 | } | |
9180135b AS |
1135 | if (uurb->buffer_length > 0) { |
1136 | as->urb->transfer_buffer = kmalloc(uurb->buffer_length, | |
1137 | GFP_KERNEL); | |
1138 | if (!as->urb->transfer_buffer) { | |
1139 | kfree(isopkt); | |
1140 | kfree(dr); | |
1141 | free_async(as); | |
1142 | return -ENOMEM; | |
1143 | } | |
1144 | } | |
04e482ff GKH |
1145 | as->urb->dev = ps->dev; |
1146 | as->urb->pipe = (uurb->type << 30) | | |
93cf9b90 AS |
1147 | __create_pipe(ps->dev, uurb->endpoint & 0xf) | |
1148 | (uurb->endpoint & USB_DIR_IN); | |
14722ef4 AS |
1149 | |
1150 | /* This tedious sequence is necessary because the URB_* flags | |
1151 | * are internal to the kernel and subject to change, whereas | |
1152 | * the USBDEVFS_URB_* flags are a user API and must not be changed. | |
1153 | */ | |
1154 | u = (is_in ? URB_DIR_IN : URB_DIR_OUT); | |
1155 | if (uurb->flags & USBDEVFS_URB_ISO_ASAP) | |
1156 | u |= URB_ISO_ASAP; | |
1157 | if (uurb->flags & USBDEVFS_URB_SHORT_NOT_OK) | |
1158 | u |= URB_SHORT_NOT_OK; | |
1159 | if (uurb->flags & USBDEVFS_URB_NO_FSBR) | |
1160 | u |= URB_NO_FSBR; | |
1161 | if (uurb->flags & USBDEVFS_URB_ZERO_PACKET) | |
1162 | u |= URB_ZERO_PACKET; | |
1163 | if (uurb->flags & USBDEVFS_URB_NO_INTERRUPT) | |
1164 | u |= URB_NO_INTERRUPT; | |
1165 | as->urb->transfer_flags = u; | |
1166 | ||
1da177e4 | 1167 | as->urb->transfer_buffer_length = uurb->buffer_length; |
04e482ff | 1168 | as->urb->setup_packet = (unsigned char *)dr; |
1da177e4 LT |
1169 | as->urb->start_frame = uurb->start_frame; |
1170 | as->urb->number_of_packets = uurb->number_of_packets; | |
97b9eb91 AS |
1171 | if (uurb->type == USBDEVFS_URB_TYPE_ISO || |
1172 | ps->dev->speed == USB_SPEED_HIGH) | |
1173 | as->urb->interval = 1 << min(15, ep->desc.bInterval - 1); | |
1174 | else | |
1175 | as->urb->interval = ep->desc.bInterval; | |
04e482ff GKH |
1176 | as->urb->context = as; |
1177 | as->urb->complete = async_completed; | |
1da177e4 LT |
1178 | for (totlen = u = 0; u < uurb->number_of_packets; u++) { |
1179 | as->urb->iso_frame_desc[u].offset = totlen; | |
1180 | as->urb->iso_frame_desc[u].length = isopkt[u].length; | |
1181 | totlen += isopkt[u].length; | |
1182 | } | |
6fd19f4b | 1183 | kfree(isopkt); |
1da177e4 | 1184 | as->ps = ps; |
04e482ff | 1185 | as->userurb = arg; |
9180135b | 1186 | if (is_in && uurb->buffer_length > 0) |
1da177e4 LT |
1187 | as->userbuffer = uurb->buffer; |
1188 | else | |
1189 | as->userbuffer = NULL; | |
1190 | as->signr = uurb->signr; | |
1191 | as->ifnum = ifnum; | |
2425c08b | 1192 | as->pid = get_pid(task_pid(current)); |
86a264ab DH |
1193 | as->uid = cred->uid; |
1194 | as->euid = cred->euid; | |
7a01955f | 1195 | security_task_getsecid(current, &as->secid); |
9180135b | 1196 | if (!is_in && uurb->buffer_length > 0) { |
93cf9b90 | 1197 | if (copy_from_user(as->urb->transfer_buffer, uurb->buffer, |
9180135b | 1198 | uurb->buffer_length)) { |
1da177e4 LT |
1199 | free_async(as); |
1200 | return -EFAULT; | |
1201 | } | |
1202 | } | |
e639dd3f | 1203 | snoop_urb(as->urb, as->userurb); |
04e482ff GKH |
1204 | async_newpending(as); |
1205 | if ((ret = usb_submit_urb(as->urb, GFP_KERNEL))) { | |
1206 | dev_printk(KERN_DEBUG, &ps->dev->dev, | |
1207 | "usbfs: usb_submit_urb returned %d\n", ret); | |
1208 | async_removepending(as); | |
1209 | free_async(as); | |
1210 | return ret; | |
1211 | } | |
1212 | return 0; | |
1da177e4 LT |
1213 | } |
1214 | ||
1215 | static int proc_submiturb(struct dev_state *ps, void __user *arg) | |
1216 | { | |
1217 | struct usbdevfs_urb uurb; | |
1218 | ||
1219 | if (copy_from_user(&uurb, arg, sizeof(uurb))) | |
1220 | return -EFAULT; | |
1221 | ||
04e482ff GKH |
1222 | return proc_do_submiturb(ps, &uurb, |
1223 | (((struct usbdevfs_urb __user *)arg)->iso_frame_desc), | |
1224 | arg); | |
1da177e4 LT |
1225 | } |
1226 | ||
1227 | static int proc_unlinkurb(struct dev_state *ps, void __user *arg) | |
1228 | { | |
1229 | struct async *as; | |
1230 | ||
1231 | as = async_getpending(ps, arg); | |
1232 | if (!as) | |
1233 | return -EINVAL; | |
1234 | usb_kill_urb(as->urb); | |
1235 | return 0; | |
1236 | } | |
1237 | ||
1238 | static int processcompl(struct async *as, void __user * __user *arg) | |
1239 | { | |
1240 | struct urb *urb = as->urb; | |
1241 | struct usbdevfs_urb __user *userurb = as->userurb; | |
1242 | void __user *addr = as->userurb; | |
1243 | unsigned int i; | |
1244 | ||
1245 | if (as->userbuffer) | |
04e482ff GKH |
1246 | if (copy_to_user(as->userbuffer, urb->transfer_buffer, |
1247 | urb->transfer_buffer_length)) | |
d794a021 | 1248 | goto err_out; |
e015268d | 1249 | if (put_user(as->status, &userurb->status)) |
d794a021 | 1250 | goto err_out; |
1da177e4 | 1251 | if (put_user(urb->actual_length, &userurb->actual_length)) |
d794a021 | 1252 | goto err_out; |
1da177e4 | 1253 | if (put_user(urb->error_count, &userurb->error_count)) |
d794a021 | 1254 | goto err_out; |
1da177e4 | 1255 | |
93cf9b90 | 1256 | if (usb_endpoint_xfer_isoc(&urb->ep->desc)) { |
668a9541 CL |
1257 | for (i = 0; i < urb->number_of_packets; i++) { |
1258 | if (put_user(urb->iso_frame_desc[i].actual_length, | |
1259 | &userurb->iso_frame_desc[i].actual_length)) | |
d794a021 | 1260 | goto err_out; |
668a9541 CL |
1261 | if (put_user(urb->iso_frame_desc[i].status, |
1262 | &userurb->iso_frame_desc[i].status)) | |
d794a021 | 1263 | goto err_out; |
668a9541 | 1264 | } |
1da177e4 LT |
1265 | } |
1266 | ||
1267 | free_async(as); | |
1268 | ||
1269 | if (put_user(addr, (void __user * __user *)arg)) | |
1270 | return -EFAULT; | |
1271 | return 0; | |
d794a021 ON |
1272 | |
1273 | err_out: | |
1274 | free_async(as); | |
1275 | return -EFAULT; | |
1da177e4 LT |
1276 | } |
1277 | ||
04e482ff | 1278 | static struct async *reap_as(struct dev_state *ps) |
1da177e4 | 1279 | { |
04e482ff | 1280 | DECLARE_WAITQUEUE(wait, current); |
1da177e4 LT |
1281 | struct async *as = NULL; |
1282 | struct usb_device *dev = ps->dev; | |
1283 | ||
1284 | add_wait_queue(&ps->wait, &wait); | |
1285 | for (;;) { | |
1286 | __set_current_state(TASK_INTERRUPTIBLE); | |
04e482ff GKH |
1287 | as = async_getcompleted(ps); |
1288 | if (as) | |
1da177e4 LT |
1289 | break; |
1290 | if (signal_pending(current)) | |
1291 | break; | |
1292 | usb_unlock_device(dev); | |
1293 | schedule(); | |
1294 | usb_lock_device(dev); | |
1295 | } | |
1296 | remove_wait_queue(&ps->wait, &wait); | |
1297 | set_current_state(TASK_RUNNING); | |
1298 | return as; | |
1299 | } | |
1300 | ||
1301 | static int proc_reapurb(struct dev_state *ps, void __user *arg) | |
1302 | { | |
1303 | struct async *as = reap_as(ps); | |
1304 | if (as) | |
1305 | return processcompl(as, (void __user * __user *)arg); | |
1306 | if (signal_pending(current)) | |
1307 | return -EINTR; | |
1308 | return -EIO; | |
1309 | } | |
1310 | ||
1311 | static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg) | |
1312 | { | |
1313 | struct async *as; | |
1314 | ||
1315 | if (!(as = async_getcompleted(ps))) | |
1316 | return -EAGAIN; | |
1317 | return processcompl(as, (void __user * __user *)arg); | |
1318 | } | |
1319 | ||
1320 | #ifdef CONFIG_COMPAT | |
1321 | ||
1322 | static int get_urb32(struct usbdevfs_urb *kurb, | |
1323 | struct usbdevfs_urb32 __user *uurb) | |
1324 | { | |
1325 | __u32 uptr; | |
18753ebc MB |
1326 | if (!access_ok(VERIFY_READ, uurb, sizeof(*uurb)) || |
1327 | __get_user(kurb->type, &uurb->type) || | |
1da177e4 LT |
1328 | __get_user(kurb->endpoint, &uurb->endpoint) || |
1329 | __get_user(kurb->status, &uurb->status) || | |
1330 | __get_user(kurb->flags, &uurb->flags) || | |
1331 | __get_user(kurb->buffer_length, &uurb->buffer_length) || | |
1332 | __get_user(kurb->actual_length, &uurb->actual_length) || | |
1333 | __get_user(kurb->start_frame, &uurb->start_frame) || | |
1334 | __get_user(kurb->number_of_packets, &uurb->number_of_packets) || | |
1335 | __get_user(kurb->error_count, &uurb->error_count) || | |
1336 | __get_user(kurb->signr, &uurb->signr)) | |
1337 | return -EFAULT; | |
1338 | ||
1339 | if (__get_user(uptr, &uurb->buffer)) | |
1340 | return -EFAULT; | |
1341 | kurb->buffer = compat_ptr(uptr); | |
ed0c7720 | 1342 | if (__get_user(uptr, &uurb->usercontext)) |
1da177e4 LT |
1343 | return -EFAULT; |
1344 | kurb->usercontext = compat_ptr(uptr); | |
1345 | ||
1346 | return 0; | |
1347 | } | |
1348 | ||
1349 | static int proc_submiturb_compat(struct dev_state *ps, void __user *arg) | |
1350 | { | |
1351 | struct usbdevfs_urb uurb; | |
1352 | ||
04e482ff | 1353 | if (get_urb32(&uurb, (struct usbdevfs_urb32 __user *)arg)) |
1da177e4 LT |
1354 | return -EFAULT; |
1355 | ||
04e482ff GKH |
1356 | return proc_do_submiturb(ps, &uurb, |
1357 | ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc, | |
1358 | arg); | |
1da177e4 LT |
1359 | } |
1360 | ||
1361 | static int processcompl_compat(struct async *as, void __user * __user *arg) | |
1362 | { | |
1363 | struct urb *urb = as->urb; | |
1364 | struct usbdevfs_urb32 __user *userurb = as->userurb; | |
1365 | void __user *addr = as->userurb; | |
1366 | unsigned int i; | |
1367 | ||
1368 | if (as->userbuffer) | |
04e482ff GKH |
1369 | if (copy_to_user(as->userbuffer, urb->transfer_buffer, |
1370 | urb->transfer_buffer_length)) | |
1da177e4 | 1371 | return -EFAULT; |
e015268d | 1372 | if (put_user(as->status, &userurb->status)) |
1da177e4 LT |
1373 | return -EFAULT; |
1374 | if (put_user(urb->actual_length, &userurb->actual_length)) | |
1375 | return -EFAULT; | |
1376 | if (put_user(urb->error_count, &userurb->error_count)) | |
1377 | return -EFAULT; | |
1378 | ||
93cf9b90 | 1379 | if (usb_endpoint_xfer_isoc(&urb->ep->desc)) { |
668a9541 CL |
1380 | for (i = 0; i < urb->number_of_packets; i++) { |
1381 | if (put_user(urb->iso_frame_desc[i].actual_length, | |
1382 | &userurb->iso_frame_desc[i].actual_length)) | |
1383 | return -EFAULT; | |
1384 | if (put_user(urb->iso_frame_desc[i].status, | |
1385 | &userurb->iso_frame_desc[i].status)) | |
1386 | return -EFAULT; | |
1387 | } | |
1da177e4 LT |
1388 | } |
1389 | ||
1390 | free_async(as); | |
c714de5d | 1391 | if (put_user(ptr_to_compat(addr), (u32 __user *)arg)) |
1da177e4 LT |
1392 | return -EFAULT; |
1393 | return 0; | |
1394 | } | |
1395 | ||
1396 | static int proc_reapurb_compat(struct dev_state *ps, void __user *arg) | |
1397 | { | |
1398 | struct async *as = reap_as(ps); | |
1399 | if (as) | |
1400 | return processcompl_compat(as, (void __user * __user *)arg); | |
1401 | if (signal_pending(current)) | |
1402 | return -EINTR; | |
1403 | return -EIO; | |
1404 | } | |
1405 | ||
1406 | static int proc_reapurbnonblock_compat(struct dev_state *ps, void __user *arg) | |
1407 | { | |
1408 | struct async *as; | |
1409 | ||
1da177e4 LT |
1410 | if (!(as = async_getcompleted(ps))) |
1411 | return -EAGAIN; | |
1da177e4 LT |
1412 | return processcompl_compat(as, (void __user * __user *)arg); |
1413 | } | |
1414 | ||
1415 | #endif | |
1416 | ||
1417 | static int proc_disconnectsignal(struct dev_state *ps, void __user *arg) | |
1418 | { | |
1419 | struct usbdevfs_disconnectsignal ds; | |
1420 | ||
1421 | if (copy_from_user(&ds, arg, sizeof(ds))) | |
1422 | return -EFAULT; | |
1da177e4 LT |
1423 | ps->discsignr = ds.signr; |
1424 | ps->disccontext = ds.context; | |
1425 | return 0; | |
1426 | } | |
1427 | ||
1428 | static int proc_claiminterface(struct dev_state *ps, void __user *arg) | |
1429 | { | |
1430 | unsigned int ifnum; | |
1431 | ||
1432 | if (get_user(ifnum, (unsigned int __user *)arg)) | |
1433 | return -EFAULT; | |
1434 | return claimintf(ps, ifnum); | |
1435 | } | |
1436 | ||
1437 | static int proc_releaseinterface(struct dev_state *ps, void __user *arg) | |
1438 | { | |
1439 | unsigned int ifnum; | |
1440 | int ret; | |
1441 | ||
1442 | if (get_user(ifnum, (unsigned int __user *)arg)) | |
1443 | return -EFAULT; | |
1444 | if ((ret = releaseintf(ps, ifnum)) < 0) | |
1445 | return ret; | |
1446 | destroy_async_on_interface (ps, ifnum); | |
1447 | return 0; | |
1448 | } | |
1449 | ||
c36fc889 | 1450 | static int proc_ioctl(struct dev_state *ps, struct usbdevfs_ioctl *ctl) |
1da177e4 | 1451 | { |
1da177e4 LT |
1452 | int size; |
1453 | void *buf = NULL; | |
1454 | int retval = 0; | |
1455 | struct usb_interface *intf = NULL; | |
1456 | struct usb_driver *driver = NULL; | |
1da177e4 | 1457 | |
c36fc889 | 1458 | /* alloc buffer */ |
04e482ff GKH |
1459 | if ((size = _IOC_SIZE(ctl->ioctl_code)) > 0) { |
1460 | if ((buf = kmalloc(size, GFP_KERNEL)) == NULL) | |
1da177e4 | 1461 | return -ENOMEM; |
c36fc889 | 1462 | if ((_IOC_DIR(ctl->ioctl_code) & _IOC_WRITE)) { |
04e482ff | 1463 | if (copy_from_user(buf, ctl->data, size)) { |
6fd19f4b | 1464 | kfree(buf); |
1da177e4 LT |
1465 | return -EFAULT; |
1466 | } | |
1467 | } else { | |
04e482ff | 1468 | memset(buf, 0, size); |
1da177e4 LT |
1469 | } |
1470 | } | |
1471 | ||
349710c3 | 1472 | if (!connected(ps)) { |
6fd19f4b | 1473 | kfree(buf); |
1da177e4 LT |
1474 | return -ENODEV; |
1475 | } | |
1476 | ||
1477 | if (ps->dev->state != USB_STATE_CONFIGURED) | |
1478 | retval = -EHOSTUNREACH; | |
04e482ff GKH |
1479 | else if (!(intf = usb_ifnum_to_if(ps->dev, ctl->ifno))) |
1480 | retval = -EINVAL; | |
c36fc889 | 1481 | else switch (ctl->ioctl_code) { |
1da177e4 LT |
1482 | |
1483 | /* disconnect kernel driver from interface */ | |
1484 | case USBDEVFS_DISCONNECT: | |
1da177e4 LT |
1485 | if (intf->dev.driver) { |
1486 | driver = to_usb_driver(intf->dev.driver); | |
04e482ff | 1487 | dev_dbg(&intf->dev, "disconnect by usbfs\n"); |
1da177e4 LT |
1488 | usb_driver_release_interface(driver, intf); |
1489 | } else | |
1490 | retval = -ENODATA; | |
1da177e4 LT |
1491 | break; |
1492 | ||
1493 | /* let kernel drivers try to (re)bind to the interface */ | |
1494 | case USBDEVFS_CONNECT: | |
885e9747 AS |
1495 | if (!intf->dev.driver) |
1496 | retval = device_attach(&intf->dev); | |
1497 | else | |
1498 | retval = -EBUSY; | |
1da177e4 LT |
1499 | break; |
1500 | ||
1501 | /* talk directly to the interface's driver */ | |
1502 | default: | |
1da177e4 LT |
1503 | if (intf->dev.driver) |
1504 | driver = to_usb_driver(intf->dev.driver); | |
1505 | if (driver == NULL || driver->ioctl == NULL) { | |
1506 | retval = -ENOTTY; | |
1507 | } else { | |
04e482ff | 1508 | retval = driver->ioctl(intf, ctl->ioctl_code, buf); |
1da177e4 LT |
1509 | if (retval == -ENOIOCTLCMD) |
1510 | retval = -ENOTTY; | |
1511 | } | |
1da177e4 LT |
1512 | } |
1513 | ||
1514 | /* cleanup and return */ | |
1515 | if (retval >= 0 | |
04e482ff | 1516 | && (_IOC_DIR(ctl->ioctl_code) & _IOC_READ) != 0 |
1da177e4 | 1517 | && size > 0 |
04e482ff | 1518 | && copy_to_user(ctl->data, buf, size) != 0) |
1da177e4 | 1519 | retval = -EFAULT; |
6fd19f4b JJ |
1520 | |
1521 | kfree(buf); | |
1da177e4 LT |
1522 | return retval; |
1523 | } | |
1524 | ||
c36fc889 PZ |
1525 | static int proc_ioctl_default(struct dev_state *ps, void __user *arg) |
1526 | { | |
1527 | struct usbdevfs_ioctl ctrl; | |
1528 | ||
04e482ff | 1529 | if (copy_from_user(&ctrl, arg, sizeof(ctrl))) |
c36fc889 PZ |
1530 | return -EFAULT; |
1531 | return proc_ioctl(ps, &ctrl); | |
1532 | } | |
1533 | ||
1534 | #ifdef CONFIG_COMPAT | |
777da590 | 1535 | static int proc_ioctl_compat(struct dev_state *ps, compat_uptr_t arg) |
c36fc889 PZ |
1536 | { |
1537 | struct usbdevfs_ioctl32 __user *uioc; | |
1538 | struct usbdevfs_ioctl ctrl; | |
1539 | u32 udata; | |
1540 | ||
058120d7 | 1541 | uioc = compat_ptr((long)arg); |
18753ebc MB |
1542 | if (!access_ok(VERIFY_READ, uioc, sizeof(*uioc)) || |
1543 | __get_user(ctrl.ifno, &uioc->ifno) || | |
1544 | __get_user(ctrl.ioctl_code, &uioc->ioctl_code) || | |
c36fc889 PZ |
1545 | __get_user(udata, &uioc->data)) |
1546 | return -EFAULT; | |
1547 | ctrl.data = compat_ptr(udata); | |
1548 | ||
1549 | return proc_ioctl(ps, &ctrl); | |
1550 | } | |
1551 | #endif | |
1552 | ||
7cbe5dca AS |
1553 | static int proc_claim_port(struct dev_state *ps, void __user *arg) |
1554 | { | |
1555 | unsigned portnum; | |
1556 | int rc; | |
1557 | ||
1558 | if (get_user(portnum, (unsigned __user *) arg)) | |
1559 | return -EFAULT; | |
1560 | rc = usb_hub_claim_port(ps->dev, portnum, ps); | |
1561 | if (rc == 0) | |
1562 | snoop(&ps->dev->dev, "port %d claimed by process %d: %s\n", | |
1563 | portnum, task_pid_nr(current), current->comm); | |
1564 | return rc; | |
1565 | } | |
1566 | ||
1567 | static int proc_release_port(struct dev_state *ps, void __user *arg) | |
1568 | { | |
1569 | unsigned portnum; | |
1570 | ||
1571 | if (get_user(portnum, (unsigned __user *) arg)) | |
1572 | return -EFAULT; | |
1573 | return usb_hub_release_port(ps->dev, portnum, ps); | |
1574 | } | |
1575 | ||
1da177e4 LT |
1576 | /* |
1577 | * NOTE: All requests here that have interface numbers as parameters | |
1578 | * are assuming that somehow the configuration has been prevented from | |
1579 | * changing. But there's no mechanism to ensure that... | |
1580 | */ | |
04e482ff GKH |
1581 | static int usbdev_ioctl(struct inode *inode, struct file *file, |
1582 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 1583 | { |
ec17cf1c | 1584 | struct dev_state *ps = file->private_data; |
1da177e4 LT |
1585 | struct usb_device *dev = ps->dev; |
1586 | void __user *p = (void __user *)arg; | |
1587 | int ret = -ENOTTY; | |
1588 | ||
1589 | if (!(file->f_mode & FMODE_WRITE)) | |
1590 | return -EPERM; | |
1591 | usb_lock_device(dev); | |
349710c3 | 1592 | if (!connected(ps)) { |
1da177e4 LT |
1593 | usb_unlock_device(dev); |
1594 | return -ENODEV; | |
1595 | } | |
1596 | ||
1597 | switch (cmd) { | |
1598 | case USBDEVFS_CONTROL: | |
441b62c1 | 1599 | snoop(&dev->dev, "%s: CONTROL\n", __func__); |
1da177e4 LT |
1600 | ret = proc_control(ps, p); |
1601 | if (ret >= 0) | |
1602 | inode->i_mtime = CURRENT_TIME; | |
1603 | break; | |
1604 | ||
1605 | case USBDEVFS_BULK: | |
441b62c1 | 1606 | snoop(&dev->dev, "%s: BULK\n", __func__); |
1da177e4 LT |
1607 | ret = proc_bulk(ps, p); |
1608 | if (ret >= 0) | |
1609 | inode->i_mtime = CURRENT_TIME; | |
1610 | break; | |
1611 | ||
1612 | case USBDEVFS_RESETEP: | |
441b62c1 | 1613 | snoop(&dev->dev, "%s: RESETEP\n", __func__); |
1da177e4 LT |
1614 | ret = proc_resetep(ps, p); |
1615 | if (ret >= 0) | |
1616 | inode->i_mtime = CURRENT_TIME; | |
1617 | break; | |
1618 | ||
1619 | case USBDEVFS_RESET: | |
441b62c1 | 1620 | snoop(&dev->dev, "%s: RESET\n", __func__); |
1da177e4 LT |
1621 | ret = proc_resetdevice(ps); |
1622 | break; | |
1623 | ||
1624 | case USBDEVFS_CLEAR_HALT: | |
441b62c1 | 1625 | snoop(&dev->dev, "%s: CLEAR_HALT\n", __func__); |
1da177e4 LT |
1626 | ret = proc_clearhalt(ps, p); |
1627 | if (ret >= 0) | |
1628 | inode->i_mtime = CURRENT_TIME; | |
1629 | break; | |
1630 | ||
1631 | case USBDEVFS_GETDRIVER: | |
441b62c1 | 1632 | snoop(&dev->dev, "%s: GETDRIVER\n", __func__); |
1da177e4 LT |
1633 | ret = proc_getdriver(ps, p); |
1634 | break; | |
1635 | ||
1636 | case USBDEVFS_CONNECTINFO: | |
441b62c1 | 1637 | snoop(&dev->dev, "%s: CONNECTINFO\n", __func__); |
1da177e4 LT |
1638 | ret = proc_connectinfo(ps, p); |
1639 | break; | |
1640 | ||
1641 | case USBDEVFS_SETINTERFACE: | |
441b62c1 | 1642 | snoop(&dev->dev, "%s: SETINTERFACE\n", __func__); |
1da177e4 LT |
1643 | ret = proc_setintf(ps, p); |
1644 | break; | |
1645 | ||
1646 | case USBDEVFS_SETCONFIGURATION: | |
441b62c1 | 1647 | snoop(&dev->dev, "%s: SETCONFIGURATION\n", __func__); |
1da177e4 LT |
1648 | ret = proc_setconfig(ps, p); |
1649 | break; | |
1650 | ||
1651 | case USBDEVFS_SUBMITURB: | |
441b62c1 | 1652 | snoop(&dev->dev, "%s: SUBMITURB\n", __func__); |
1da177e4 LT |
1653 | ret = proc_submiturb(ps, p); |
1654 | if (ret >= 0) | |
1655 | inode->i_mtime = CURRENT_TIME; | |
1656 | break; | |
1657 | ||
1658 | #ifdef CONFIG_COMPAT | |
1659 | ||
1660 | case USBDEVFS_SUBMITURB32: | |
441b62c1 | 1661 | snoop(&dev->dev, "%s: SUBMITURB32\n", __func__); |
1da177e4 LT |
1662 | ret = proc_submiturb_compat(ps, p); |
1663 | if (ret >= 0) | |
1664 | inode->i_mtime = CURRENT_TIME; | |
1665 | break; | |
1666 | ||
1667 | case USBDEVFS_REAPURB32: | |
441b62c1 | 1668 | snoop(&dev->dev, "%s: REAPURB32\n", __func__); |
1da177e4 LT |
1669 | ret = proc_reapurb_compat(ps, p); |
1670 | break; | |
1671 | ||
1672 | case USBDEVFS_REAPURBNDELAY32: | |
441b62c1 | 1673 | snoop(&dev->dev, "%s: REAPURBDELAY32\n", __func__); |
1da177e4 LT |
1674 | ret = proc_reapurbnonblock_compat(ps, p); |
1675 | break; | |
1676 | ||
c36fc889 | 1677 | case USBDEVFS_IOCTL32: |
441b62c1 | 1678 | snoop(&dev->dev, "%s: IOCTL\n", __func__); |
c714de5d | 1679 | ret = proc_ioctl_compat(ps, ptr_to_compat(p)); |
c36fc889 | 1680 | break; |
1da177e4 LT |
1681 | #endif |
1682 | ||
1683 | case USBDEVFS_DISCARDURB: | |
441b62c1 | 1684 | snoop(&dev->dev, "%s: DISCARDURB\n", __func__); |
1da177e4 LT |
1685 | ret = proc_unlinkurb(ps, p); |
1686 | break; | |
1687 | ||
1688 | case USBDEVFS_REAPURB: | |
441b62c1 | 1689 | snoop(&dev->dev, "%s: REAPURB\n", __func__); |
1da177e4 LT |
1690 | ret = proc_reapurb(ps, p); |
1691 | break; | |
1692 | ||
1693 | case USBDEVFS_REAPURBNDELAY: | |
441b62c1 | 1694 | snoop(&dev->dev, "%s: REAPURBDELAY\n", __func__); |
1da177e4 LT |
1695 | ret = proc_reapurbnonblock(ps, p); |
1696 | break; | |
1697 | ||
1698 | case USBDEVFS_DISCSIGNAL: | |
441b62c1 | 1699 | snoop(&dev->dev, "%s: DISCSIGNAL\n", __func__); |
1da177e4 LT |
1700 | ret = proc_disconnectsignal(ps, p); |
1701 | break; | |
1702 | ||
1703 | case USBDEVFS_CLAIMINTERFACE: | |
441b62c1 | 1704 | snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __func__); |
1da177e4 LT |
1705 | ret = proc_claiminterface(ps, p); |
1706 | break; | |
1707 | ||
1708 | case USBDEVFS_RELEASEINTERFACE: | |
441b62c1 | 1709 | snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __func__); |
1da177e4 LT |
1710 | ret = proc_releaseinterface(ps, p); |
1711 | break; | |
1712 | ||
1713 | case USBDEVFS_IOCTL: | |
441b62c1 | 1714 | snoop(&dev->dev, "%s: IOCTL\n", __func__); |
c36fc889 | 1715 | ret = proc_ioctl_default(ps, p); |
1da177e4 | 1716 | break; |
7cbe5dca AS |
1717 | |
1718 | case USBDEVFS_CLAIM_PORT: | |
1719 | snoop(&dev->dev, "%s: CLAIM_PORT\n", __func__); | |
1720 | ret = proc_claim_port(ps, p); | |
1721 | break; | |
1722 | ||
1723 | case USBDEVFS_RELEASE_PORT: | |
1724 | snoop(&dev->dev, "%s: RELEASE_PORT\n", __func__); | |
1725 | ret = proc_release_port(ps, p); | |
1726 | break; | |
1da177e4 LT |
1727 | } |
1728 | usb_unlock_device(dev); | |
1729 | if (ret >= 0) | |
1730 | inode->i_atime = CURRENT_TIME; | |
1731 | return ret; | |
1732 | } | |
1733 | ||
1734 | /* No kernel lock - fine */ | |
04e482ff GKH |
1735 | static unsigned int usbdev_poll(struct file *file, |
1736 | struct poll_table_struct *wait) | |
1da177e4 | 1737 | { |
ec17cf1c TK |
1738 | struct dev_state *ps = file->private_data; |
1739 | unsigned int mask = 0; | |
1da177e4 LT |
1740 | |
1741 | poll_wait(file, &ps->wait, wait); | |
1742 | if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed)) | |
1743 | mask |= POLLOUT | POLLWRNORM; | |
349710c3 | 1744 | if (!connected(ps)) |
1da177e4 LT |
1745 | mask |= POLLERR | POLLHUP; |
1746 | return mask; | |
1747 | } | |
1748 | ||
9f8b17e6 | 1749 | const struct file_operations usbdev_file_operations = { |
7e7654a9 | 1750 | .owner = THIS_MODULE, |
1da177e4 LT |
1751 | .llseek = usbdev_lseek, |
1752 | .read = usbdev_read, | |
1753 | .poll = usbdev_poll, | |
1754 | .ioctl = usbdev_ioctl, | |
1755 | .open = usbdev_open, | |
1756 | .release = usbdev_release, | |
1757 | }; | |
fbf82fd2 | 1758 | |
501950d8 | 1759 | static void usbdev_remove(struct usb_device *udev) |
cd9f0375 AS |
1760 | { |
1761 | struct dev_state *ps; | |
1762 | struct siginfo sinfo; | |
1763 | ||
1764 | while (!list_empty(&udev->filelist)) { | |
1765 | ps = list_entry(udev->filelist.next, struct dev_state, list); | |
1766 | destroy_all_async(ps); | |
1767 | wake_up_all(&ps->wait); | |
1768 | list_del_init(&ps->list); | |
1769 | if (ps->discsignr) { | |
1770 | sinfo.si_signo = ps->discsignr; | |
1771 | sinfo.si_errno = EPIPE; | |
1772 | sinfo.si_code = SI_ASYNCIO; | |
1773 | sinfo.si_addr = ps->disccontext; | |
1774 | kill_pid_info_as_uid(ps->discsignr, &sinfo, | |
1775 | ps->disc_pid, ps->disc_uid, | |
1776 | ps->disc_euid, ps->secid); | |
1777 | } | |
1778 | } | |
1779 | } | |
1780 | ||
9f8b17e6 KS |
1781 | #ifdef CONFIG_USB_DEVICE_CLASS |
1782 | static struct class *usb_classdev_class; | |
1783 | ||
1784 | static int usb_classdev_add(struct usb_device *dev) | |
fbf82fd2 | 1785 | { |
e04199b2 AS |
1786 | struct device *cldev; |
1787 | ||
b0b090e5 GKH |
1788 | cldev = device_create(usb_classdev_class, &dev->dev, dev->dev.devt, |
1789 | NULL, "usbdev%d.%d", dev->bus->busnum, | |
1790 | dev->devnum); | |
e04199b2 AS |
1791 | if (IS_ERR(cldev)) |
1792 | return PTR_ERR(cldev); | |
1793 | dev->usb_classdev = cldev; | |
27d39e26 | 1794 | return 0; |
fbf82fd2 KS |
1795 | } |
1796 | ||
9f8b17e6 | 1797 | static void usb_classdev_remove(struct usb_device *dev) |
fbf82fd2 | 1798 | { |
e04199b2 AS |
1799 | if (dev->usb_classdev) |
1800 | device_unregister(dev->usb_classdev); | |
fbf82fd2 KS |
1801 | } |
1802 | ||
501950d8 AS |
1803 | #else |
1804 | #define usb_classdev_add(dev) 0 | |
1805 | #define usb_classdev_remove(dev) do {} while (0) | |
1806 | ||
1807 | #endif | |
1808 | ||
1809 | static int usbdev_notify(struct notifier_block *self, | |
9f8b17e6 | 1810 | unsigned long action, void *dev) |
a7b986b3 GKH |
1811 | { |
1812 | switch (action) { | |
1813 | case USB_DEVICE_ADD: | |
9f8b17e6 | 1814 | if (usb_classdev_add(dev)) |
27d39e26 | 1815 | return NOTIFY_BAD; |
a7b986b3 GKH |
1816 | break; |
1817 | case USB_DEVICE_REMOVE: | |
9f8b17e6 | 1818 | usb_classdev_remove(dev); |
501950d8 | 1819 | usbdev_remove(dev); |
a7b986b3 GKH |
1820 | break; |
1821 | } | |
1822 | return NOTIFY_OK; | |
1823 | } | |
1824 | ||
1825 | static struct notifier_block usbdev_nb = { | |
501950d8 | 1826 | .notifier_call = usbdev_notify, |
a7b986b3 GKH |
1827 | }; |
1828 | ||
7e7654a9 | 1829 | static struct cdev usb_device_cdev; |
fbf82fd2 | 1830 | |
9f8b17e6 | 1831 | int __init usb_devio_init(void) |
fbf82fd2 KS |
1832 | { |
1833 | int retval; | |
1834 | ||
fad21bdf | 1835 | retval = register_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX, |
04e482ff | 1836 | "usb_device"); |
fbf82fd2 | 1837 | if (retval) { |
69a85942 | 1838 | printk(KERN_ERR "Unable to register minors for usb_device\n"); |
fbf82fd2 KS |
1839 | goto out; |
1840 | } | |
9f8b17e6 | 1841 | cdev_init(&usb_device_cdev, &usbdev_file_operations); |
fad21bdf | 1842 | retval = cdev_add(&usb_device_cdev, USB_DEVICE_DEV, USB_DEVICE_MAX); |
fbf82fd2 | 1843 | if (retval) { |
69a85942 GKH |
1844 | printk(KERN_ERR "Unable to get usb_device major %d\n", |
1845 | USB_DEVICE_MAJOR); | |
a7b986b3 | 1846 | goto error_cdev; |
fbf82fd2 | 1847 | } |
9f8b17e6 KS |
1848 | #ifdef CONFIG_USB_DEVICE_CLASS |
1849 | usb_classdev_class = class_create(THIS_MODULE, "usb_device"); | |
1850 | if (IS_ERR(usb_classdev_class)) { | |
69a85942 | 1851 | printk(KERN_ERR "Unable to register usb_device class\n"); |
9f8b17e6 KS |
1852 | retval = PTR_ERR(usb_classdev_class); |
1853 | cdev_del(&usb_device_cdev); | |
1854 | usb_classdev_class = NULL; | |
1855 | goto out; | |
fbf82fd2 | 1856 | } |
e105b8bf DW |
1857 | /* devices of this class shadow the major:minor of their parent |
1858 | * device, so clear ->dev_kobj to prevent adding duplicate entries | |
1859 | * to /sys/dev | |
1860 | */ | |
1861 | usb_classdev_class->dev_kobj = NULL; | |
9f8b17e6 | 1862 | #endif |
501950d8 | 1863 | usb_register_notify(&usbdev_nb); |
fbf82fd2 KS |
1864 | out: |
1865 | return retval; | |
a7b986b3 | 1866 | |
a7b986b3 GKH |
1867 | error_cdev: |
1868 | unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX); | |
1869 | goto out; | |
fbf82fd2 KS |
1870 | } |
1871 | ||
9f8b17e6 | 1872 | void usb_devio_cleanup(void) |
fbf82fd2 | 1873 | { |
a7b986b3 | 1874 | usb_unregister_notify(&usbdev_nb); |
501950d8 | 1875 | #ifdef CONFIG_USB_DEVICE_CLASS |
9f8b17e6 KS |
1876 | class_destroy(usb_classdev_class); |
1877 | #endif | |
fbf82fd2 | 1878 | cdev_del(&usb_device_cdev); |
fad21bdf | 1879 | unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX); |
fbf82fd2 | 1880 | } |