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 | ||
1da177e4 LT |
62 | struct async { |
63 | struct list_head asynclist; | |
64 | struct dev_state *ps; | |
2425c08b | 65 | struct pid *pid; |
46113830 | 66 | uid_t uid, euid; |
1da177e4 LT |
67 | unsigned int signr; |
68 | unsigned int ifnum; | |
69 | void __user *userbuffer; | |
70 | void __user *userurb; | |
71 | struct urb *urb; | |
e015268d | 72 | int status; |
7a01955f | 73 | u32 secid; |
1da177e4 LT |
74 | }; |
75 | ||
04e482ff GKH |
76 | static int usbfs_snoop; |
77 | module_param(usbfs_snoop, bool, S_IRUGO | S_IWUSR); | |
78 | MODULE_PARM_DESC(usbfs_snoop, "true to log all usbfs traffic"); | |
1da177e4 LT |
79 | |
80 | #define snoop(dev, format, arg...) \ | |
81 | do { \ | |
82 | if (usbfs_snoop) \ | |
04e482ff | 83 | dev_info(dev , format , ## arg); \ |
1da177e4 LT |
84 | } while (0) |
85 | ||
fad21bdf AS |
86 | #define USB_DEVICE_DEV MKDEV(USB_DEVICE_MAJOR, 0) |
87 | ||
1da177e4 LT |
88 | |
89 | #define MAX_USBFS_BUFFER_SIZE 16384 | |
90 | ||
04e482ff | 91 | static inline int connected(struct dev_state *ps) |
1da177e4 | 92 | { |
349710c3 AS |
93 | return (!list_empty(&ps->list) && |
94 | ps->dev->state != USB_STATE_NOTATTACHED); | |
1da177e4 LT |
95 | } |
96 | ||
97 | static loff_t usbdev_lseek(struct file *file, loff_t offset, int orig) | |
98 | { | |
99 | loff_t ret; | |
100 | ||
101 | lock_kernel(); | |
102 | ||
103 | switch (orig) { | |
104 | case 0: | |
105 | file->f_pos = offset; | |
106 | ret = file->f_pos; | |
107 | break; | |
108 | case 1: | |
109 | file->f_pos += offset; | |
110 | ret = file->f_pos; | |
111 | break; | |
112 | case 2: | |
113 | default: | |
114 | ret = -EINVAL; | |
115 | } | |
116 | ||
117 | unlock_kernel(); | |
118 | return ret; | |
119 | } | |
120 | ||
04e482ff GKH |
121 | static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes, |
122 | loff_t *ppos) | |
1da177e4 | 123 | { |
ec17cf1c | 124 | struct dev_state *ps = file->private_data; |
1da177e4 LT |
125 | struct usb_device *dev = ps->dev; |
126 | ssize_t ret = 0; | |
127 | unsigned len; | |
128 | loff_t pos; | |
129 | int i; | |
130 | ||
131 | pos = *ppos; | |
132 | usb_lock_device(dev); | |
349710c3 | 133 | if (!connected(ps)) { |
1da177e4 LT |
134 | ret = -ENODEV; |
135 | goto err; | |
136 | } else if (pos < 0) { | |
137 | ret = -EINVAL; | |
138 | goto err; | |
139 | } | |
140 | ||
141 | if (pos < sizeof(struct usb_device_descriptor)) { | |
04e482ff GKH |
142 | /* 18 bytes - fits on the stack */ |
143 | struct usb_device_descriptor temp_desc; | |
8781ba0a ON |
144 | |
145 | memcpy(&temp_desc, &dev->descriptor, sizeof(dev->descriptor)); | |
9fcd5c32 AM |
146 | le16_to_cpus(&temp_desc.bcdUSB); |
147 | le16_to_cpus(&temp_desc.idVendor); | |
148 | le16_to_cpus(&temp_desc.idProduct); | |
149 | le16_to_cpus(&temp_desc.bcdDevice); | |
1da177e4 LT |
150 | |
151 | len = sizeof(struct usb_device_descriptor) - pos; | |
152 | if (len > nbytes) | |
153 | len = nbytes; | |
8781ba0a | 154 | if (copy_to_user(buf, ((char *)&temp_desc) + pos, len)) { |
1da177e4 LT |
155 | ret = -EFAULT; |
156 | goto err; | |
157 | } | |
1da177e4 LT |
158 | |
159 | *ppos += len; | |
160 | buf += len; | |
161 | nbytes -= len; | |
162 | ret += len; | |
163 | } | |
164 | ||
165 | pos = sizeof(struct usb_device_descriptor); | |
166 | for (i = 0; nbytes && i < dev->descriptor.bNumConfigurations; i++) { | |
167 | struct usb_config_descriptor *config = | |
168 | (struct usb_config_descriptor *)dev->rawdescriptors[i]; | |
169 | unsigned int length = le16_to_cpu(config->wTotalLength); | |
170 | ||
171 | if (*ppos < pos + length) { | |
172 | ||
173 | /* The descriptor may claim to be longer than it | |
174 | * really is. Here is the actual allocated length. */ | |
175 | unsigned alloclen = | |
176 | le16_to_cpu(dev->config[i].desc.wTotalLength); | |
177 | ||
178 | len = length - (*ppos - pos); | |
179 | if (len > nbytes) | |
180 | len = nbytes; | |
181 | ||
182 | /* Simply don't write (skip over) unallocated parts */ | |
183 | if (alloclen > (*ppos - pos)) { | |
184 | alloclen -= (*ppos - pos); | |
185 | if (copy_to_user(buf, | |
186 | dev->rawdescriptors[i] + (*ppos - pos), | |
187 | min(len, alloclen))) { | |
188 | ret = -EFAULT; | |
189 | goto err; | |
190 | } | |
191 | } | |
192 | ||
193 | *ppos += len; | |
194 | buf += len; | |
195 | nbytes -= len; | |
196 | ret += len; | |
197 | } | |
198 | ||
199 | pos += length; | |
200 | } | |
201 | ||
202 | err: | |
203 | usb_unlock_device(dev); | |
204 | return ret; | |
205 | } | |
206 | ||
207 | /* | |
208 | * async list handling | |
209 | */ | |
210 | ||
211 | static struct async *alloc_async(unsigned int numisoframes) | |
212 | { | |
dd95b814 | 213 | struct async *as; |
0a1ef3b5 | 214 | |
dd95b814 | 215 | as = kzalloc(sizeof(struct async), GFP_KERNEL); |
04e482ff GKH |
216 | if (!as) |
217 | return NULL; | |
1da177e4 LT |
218 | as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL); |
219 | if (!as->urb) { | |
220 | kfree(as); | |
221 | return NULL; | |
222 | } | |
04e482ff | 223 | return as; |
1da177e4 LT |
224 | } |
225 | ||
226 | static void free_async(struct async *as) | |
227 | { | |
2425c08b | 228 | put_pid(as->pid); |
6fd19f4b JJ |
229 | kfree(as->urb->transfer_buffer); |
230 | kfree(as->urb->setup_packet); | |
1da177e4 | 231 | usb_free_urb(as->urb); |
6fd19f4b | 232 | kfree(as); |
1da177e4 LT |
233 | } |
234 | ||
235 | static inline void async_newpending(struct async *as) | |
236 | { | |
04e482ff GKH |
237 | struct dev_state *ps = as->ps; |
238 | unsigned long flags; | |
239 | ||
240 | spin_lock_irqsave(&ps->lock, flags); | |
241 | list_add_tail(&as->asynclist, &ps->async_pending); | |
242 | spin_unlock_irqrestore(&ps->lock, flags); | |
1da177e4 LT |
243 | } |
244 | ||
245 | static inline void async_removepending(struct async *as) | |
246 | { | |
04e482ff GKH |
247 | struct dev_state *ps = as->ps; |
248 | unsigned long flags; | |
249 | ||
250 | spin_lock_irqsave(&ps->lock, flags); | |
251 | list_del_init(&as->asynclist); | |
252 | spin_unlock_irqrestore(&ps->lock, flags); | |
1da177e4 LT |
253 | } |
254 | ||
255 | static inline struct async *async_getcompleted(struct dev_state *ps) | |
256 | { | |
04e482ff GKH |
257 | unsigned long flags; |
258 | struct async *as = NULL; | |
259 | ||
260 | spin_lock_irqsave(&ps->lock, flags); | |
261 | if (!list_empty(&ps->async_completed)) { | |
262 | as = list_entry(ps->async_completed.next, struct async, | |
263 | asynclist); | |
264 | list_del_init(&as->asynclist); | |
265 | } | |
266 | spin_unlock_irqrestore(&ps->lock, flags); | |
267 | return as; | |
1da177e4 LT |
268 | } |
269 | ||
04e482ff GKH |
270 | static inline struct async *async_getpending(struct dev_state *ps, |
271 | void __user *userurb) | |
1da177e4 | 272 | { |
04e482ff GKH |
273 | unsigned long flags; |
274 | struct async *as; | |
1da177e4 | 275 | |
04e482ff | 276 | spin_lock_irqsave(&ps->lock, flags); |
1da177e4 LT |
277 | list_for_each_entry(as, &ps->async_pending, asynclist) |
278 | if (as->userurb == userurb) { | |
279 | list_del_init(&as->asynclist); | |
280 | spin_unlock_irqrestore(&ps->lock, flags); | |
281 | return as; | |
282 | } | |
04e482ff GKH |
283 | spin_unlock_irqrestore(&ps->lock, flags); |
284 | return NULL; | |
1da177e4 LT |
285 | } |
286 | ||
e639dd3f GKH |
287 | static void snoop_urb(struct urb *urb, void __user *userurb) |
288 | { | |
289 | int j; | |
290 | unsigned char *data = urb->transfer_buffer; | |
291 | ||
292 | if (!usbfs_snoop) | |
293 | return; | |
294 | ||
93cf9b90 AS |
295 | dev_info(&urb->dev->dev, "direction=%s\n", |
296 | usb_urb_dir_in(urb) ? "IN" : "OUT"); | |
e639dd3f GKH |
297 | dev_info(&urb->dev->dev, "userurb=%p\n", userurb); |
298 | dev_info(&urb->dev->dev, "transfer_buffer_length=%d\n", | |
299 | urb->transfer_buffer_length); | |
300 | dev_info(&urb->dev->dev, "actual_length=%d\n", urb->actual_length); | |
301 | dev_info(&urb->dev->dev, "data: "); | |
302 | for (j = 0; j < urb->transfer_buffer_length; ++j) | |
04e482ff | 303 | printk("%02x ", data[j]); |
e639dd3f GKH |
304 | printk("\n"); |
305 | } | |
306 | ||
7d12e780 | 307 | static void async_completed(struct urb *urb) |
1da177e4 | 308 | { |
04e482ff GKH |
309 | struct async *as = urb->context; |
310 | struct dev_state *ps = as->ps; | |
1da177e4 LT |
311 | struct siginfo sinfo; |
312 | ||
04e482ff GKH |
313 | spin_lock(&ps->lock); |
314 | list_move_tail(&as->asynclist, &ps->async_completed); | |
315 | spin_unlock(&ps->lock); | |
e015268d | 316 | as->status = urb->status; |
1da177e4 LT |
317 | if (as->signr) { |
318 | sinfo.si_signo = as->signr; | |
e015268d | 319 | sinfo.si_errno = as->status; |
1da177e4 LT |
320 | sinfo.si_code = SI_ASYNCIO; |
321 | sinfo.si_addr = as->userurb; | |
2425c08b | 322 | kill_pid_info_as_uid(as->signr, &sinfo, as->pid, as->uid, |
7a01955f | 323 | as->euid, as->secid); |
1da177e4 | 324 | } |
e639dd3f GKH |
325 | snoop(&urb->dev->dev, "urb complete\n"); |
326 | snoop_urb(urb, as->userurb); | |
327 | wake_up(&ps->wait); | |
1da177e4 LT |
328 | } |
329 | ||
04e482ff | 330 | static void destroy_async(struct dev_state *ps, struct list_head *list) |
1da177e4 LT |
331 | { |
332 | struct async *as; | |
333 | unsigned long flags; | |
334 | ||
335 | spin_lock_irqsave(&ps->lock, flags); | |
336 | while (!list_empty(list)) { | |
337 | as = list_entry(list->next, struct async, asynclist); | |
338 | list_del_init(&as->asynclist); | |
339 | ||
340 | /* drop the spinlock so the completion handler can run */ | |
341 | spin_unlock_irqrestore(&ps->lock, flags); | |
342 | usb_kill_urb(as->urb); | |
343 | spin_lock_irqsave(&ps->lock, flags); | |
344 | } | |
345 | spin_unlock_irqrestore(&ps->lock, flags); | |
346 | as = async_getcompleted(ps); | |
347 | while (as) { | |
348 | free_async(as); | |
349 | as = async_getcompleted(ps); | |
350 | } | |
351 | } | |
352 | ||
04e482ff GKH |
353 | static void destroy_async_on_interface(struct dev_state *ps, |
354 | unsigned int ifnum) | |
1da177e4 LT |
355 | { |
356 | struct list_head *p, *q, hitlist; | |
357 | unsigned long flags; | |
358 | ||
359 | INIT_LIST_HEAD(&hitlist); | |
360 | spin_lock_irqsave(&ps->lock, flags); | |
361 | list_for_each_safe(p, q, &ps->async_pending) | |
362 | if (ifnum == list_entry(p, struct async, asynclist)->ifnum) | |
363 | list_move_tail(p, &hitlist); | |
364 | spin_unlock_irqrestore(&ps->lock, flags); | |
365 | destroy_async(ps, &hitlist); | |
366 | } | |
367 | ||
368 | static inline void destroy_all_async(struct dev_state *ps) | |
369 | { | |
04e482ff | 370 | destroy_async(ps, &ps->async_pending); |
1da177e4 LT |
371 | } |
372 | ||
373 | /* | |
374 | * interface claims are made only at the request of user level code, | |
375 | * which can also release them (explicitly or by closing files). | |
376 | * they're also undone when devices disconnect. | |
377 | */ | |
378 | ||
04e482ff GKH |
379 | static int driver_probe(struct usb_interface *intf, |
380 | const struct usb_device_id *id) | |
1da177e4 LT |
381 | { |
382 | return -ENODEV; | |
383 | } | |
384 | ||
385 | static void driver_disconnect(struct usb_interface *intf) | |
386 | { | |
04e482ff | 387 | struct dev_state *ps = usb_get_intfdata(intf); |
1da177e4 LT |
388 | unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber; |
389 | ||
390 | if (!ps) | |
391 | return; | |
392 | ||
393 | /* NOTE: this relies on usbcore having canceled and completed | |
394 | * all pending I/O requests; 2.6 does that. | |
395 | */ | |
396 | ||
397 | if (likely(ifnum < 8*sizeof(ps->ifclaimed))) | |
398 | clear_bit(ifnum, &ps->ifclaimed); | |
399 | else | |
400 | warn("interface number %u out of range", ifnum); | |
401 | ||
04e482ff | 402 | usb_set_intfdata(intf, NULL); |
1da177e4 LT |
403 | |
404 | /* force async requests to complete */ | |
405 | destroy_async_on_interface(ps, ifnum); | |
406 | } | |
407 | ||
2e2eb83f AS |
408 | /* The following routines are merely placeholders. There is no way |
409 | * to inform a user task about suspend or resumes. | |
410 | */ | |
411 | static int driver_suspend(struct usb_interface *intf, pm_message_t msg) | |
412 | { | |
413 | return 0; | |
414 | } | |
415 | ||
416 | static int driver_resume(struct usb_interface *intf) | |
417 | { | |
418 | return 0; | |
419 | } | |
420 | ||
1da177e4 | 421 | struct usb_driver usbfs_driver = { |
1da177e4 LT |
422 | .name = "usbfs", |
423 | .probe = driver_probe, | |
424 | .disconnect = driver_disconnect, | |
2e2eb83f AS |
425 | .suspend = driver_suspend, |
426 | .resume = driver_resume, | |
1da177e4 LT |
427 | }; |
428 | ||
429 | static int claimintf(struct dev_state *ps, unsigned int ifnum) | |
430 | { | |
431 | struct usb_device *dev = ps->dev; | |
432 | struct usb_interface *intf; | |
433 | int err; | |
434 | ||
435 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
436 | return -EINVAL; | |
437 | /* already claimed */ | |
438 | if (test_bit(ifnum, &ps->ifclaimed)) | |
439 | return 0; | |
440 | ||
1da177e4 LT |
441 | intf = usb_ifnum_to_if(dev, ifnum); |
442 | if (!intf) | |
443 | err = -ENOENT; | |
444 | else | |
445 | err = usb_driver_claim_interface(&usbfs_driver, intf, ps); | |
1da177e4 LT |
446 | if (err == 0) |
447 | set_bit(ifnum, &ps->ifclaimed); | |
448 | return err; | |
449 | } | |
450 | ||
451 | static int releaseintf(struct dev_state *ps, unsigned int ifnum) | |
452 | { | |
453 | struct usb_device *dev; | |
454 | struct usb_interface *intf; | |
455 | int err; | |
456 | ||
457 | err = -EINVAL; | |
458 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
459 | return err; | |
460 | dev = ps->dev; | |
1da177e4 LT |
461 | intf = usb_ifnum_to_if(dev, ifnum); |
462 | if (!intf) | |
463 | err = -ENOENT; | |
464 | else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) { | |
465 | usb_driver_release_interface(&usbfs_driver, intf); | |
466 | err = 0; | |
467 | } | |
1da177e4 LT |
468 | return err; |
469 | } | |
470 | ||
471 | static int checkintf(struct dev_state *ps, unsigned int ifnum) | |
472 | { | |
473 | if (ps->dev->state != USB_STATE_CONFIGURED) | |
474 | return -EHOSTUNREACH; | |
475 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
476 | return -EINVAL; | |
477 | if (test_bit(ifnum, &ps->ifclaimed)) | |
478 | return 0; | |
479 | /* if not yet claimed, claim it for the driver */ | |
04e482ff GKH |
480 | dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim " |
481 | "interface %u before use\n", task_pid_nr(current), | |
482 | current->comm, ifnum); | |
1da177e4 LT |
483 | return claimintf(ps, ifnum); |
484 | } | |
485 | ||
486 | static int findintfep(struct usb_device *dev, unsigned int ep) | |
487 | { | |
488 | unsigned int i, j, e; | |
04e482ff | 489 | struct usb_interface *intf; |
1da177e4 LT |
490 | struct usb_host_interface *alts; |
491 | struct usb_endpoint_descriptor *endpt; | |
492 | ||
493 | if (ep & ~(USB_DIR_IN|0xf)) | |
494 | return -EINVAL; | |
495 | if (!dev->actconfig) | |
496 | return -ESRCH; | |
497 | for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) { | |
498 | intf = dev->actconfig->interface[i]; | |
499 | for (j = 0; j < intf->num_altsetting; j++) { | |
04e482ff | 500 | alts = &intf->altsetting[j]; |
1da177e4 LT |
501 | for (e = 0; e < alts->desc.bNumEndpoints; e++) { |
502 | endpt = &alts->endpoint[e].desc; | |
503 | if (endpt->bEndpointAddress == ep) | |
504 | return alts->desc.bInterfaceNumber; | |
505 | } | |
506 | } | |
507 | } | |
04e482ff | 508 | return -ENOENT; |
1da177e4 LT |
509 | } |
510 | ||
04e482ff GKH |
511 | static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype, |
512 | unsigned int index) | |
1da177e4 LT |
513 | { |
514 | int ret = 0; | |
515 | ||
24f8b116 HS |
516 | if (ps->dev->state != USB_STATE_ADDRESS |
517 | && ps->dev->state != USB_STATE_CONFIGURED) | |
1da177e4 LT |
518 | return -EHOSTUNREACH; |
519 | if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype)) | |
520 | return 0; | |
521 | ||
522 | index &= 0xff; | |
523 | switch (requesttype & USB_RECIP_MASK) { | |
524 | case USB_RECIP_ENDPOINT: | |
04e482ff GKH |
525 | ret = findintfep(ps->dev, index); |
526 | if (ret >= 0) | |
1da177e4 LT |
527 | ret = checkintf(ps, ret); |
528 | break; | |
529 | ||
530 | case USB_RECIP_INTERFACE: | |
531 | ret = checkintf(ps, index); | |
532 | break; | |
533 | } | |
534 | return ret; | |
535 | } | |
536 | ||
9f8b17e6 | 537 | static int __match_minor(struct device *dev, void *data) |
4592bf5a | 538 | { |
9f8b17e6 | 539 | int minor = *((int *)data); |
4592bf5a | 540 | |
9f8b17e6 KS |
541 | if (dev->devt == MKDEV(USB_DEVICE_MAJOR, minor)) |
542 | return 1; | |
543 | return 0; | |
544 | } | |
4592bf5a | 545 | |
9f8b17e6 KS |
546 | static struct usb_device *usbdev_lookup_by_minor(int minor) |
547 | { | |
548 | struct device *dev; | |
549 | ||
550 | dev = bus_find_device(&usb_bus_type, NULL, &minor, __match_minor); | |
551 | if (!dev) | |
552 | return NULL; | |
553 | put_device(dev); | |
554 | return container_of(dev, struct usb_device, dev); | |
555 | } | |
4592bf5a | 556 | |
1da177e4 LT |
557 | /* |
558 | * file operations | |
559 | */ | |
560 | static int usbdev_open(struct inode *inode, struct file *file) | |
561 | { | |
fbf82fd2 | 562 | struct usb_device *dev = NULL; |
1da177e4 LT |
563 | struct dev_state *ps; |
564 | int ret; | |
565 | ||
b5b4aa67 | 566 | lock_kernel(); |
4a2a8a2c AS |
567 | /* Protect against simultaneous removal or release */ |
568 | mutex_lock(&usbfs_mutex); | |
569 | ||
1da177e4 | 570 | ret = -ENOMEM; |
04e482ff GKH |
571 | ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL); |
572 | if (!ps) | |
4a2a8a2c | 573 | goto out; |
1da177e4 | 574 | |
1da177e4 | 575 | ret = -ENOENT; |
9f8b17e6 | 576 | /* usbdev device-node */ |
fbf82fd2 | 577 | if (imajor(inode) == USB_DEVICE_MAJOR) |
9f8b17e6 KS |
578 | dev = usbdev_lookup_by_minor(iminor(inode)); |
579 | #ifdef CONFIG_USB_DEVICEFS | |
580 | /* procfs file */ | |
fbf82fd2 | 581 | if (!dev) |
8e18e294 | 582 | dev = inode->i_private; |
9f8b17e6 | 583 | #endif |
01d883d4 | 584 | if (!dev) |
1da177e4 | 585 | goto out; |
94fcda1f | 586 | ret = usb_autoresume_device(dev); |
01d883d4 AS |
587 | if (ret) |
588 | goto out; | |
589 | ||
fbf82fd2 | 590 | usb_get_dev(dev); |
1da177e4 LT |
591 | ret = 0; |
592 | ps->dev = dev; | |
593 | ps->file = file; | |
594 | spin_lock_init(&ps->lock); | |
316547fd | 595 | INIT_LIST_HEAD(&ps->list); |
1da177e4 LT |
596 | INIT_LIST_HEAD(&ps->async_pending); |
597 | INIT_LIST_HEAD(&ps->async_completed); | |
598 | init_waitqueue_head(&ps->wait); | |
599 | ps->discsignr = 0; | |
2425c08b | 600 | ps->disc_pid = get_pid(task_pid(current)); |
d7dd8a72 LT |
601 | ps->disc_uid = current->uid; |
602 | ps->disc_euid = current->euid; | |
1da177e4 LT |
603 | ps->disccontext = NULL; |
604 | ps->ifclaimed = 0; | |
7a01955f | 605 | security_task_getsecid(current, &ps->secid); |
527660a8 | 606 | smp_wmb(); |
1da177e4 LT |
607 | list_add_tail(&ps->list, &dev->filelist); |
608 | file->private_data = ps; | |
609 | out: | |
01d883d4 AS |
610 | if (ret) |
611 | kfree(ps); | |
4a2a8a2c | 612 | mutex_unlock(&usbfs_mutex); |
b5b4aa67 | 613 | unlock_kernel(); |
4a2a8a2c | 614 | return ret; |
1da177e4 LT |
615 | } |
616 | ||
617 | static int usbdev_release(struct inode *inode, struct file *file) | |
618 | { | |
ec17cf1c | 619 | struct dev_state *ps = file->private_data; |
1da177e4 LT |
620 | struct usb_device *dev = ps->dev; |
621 | unsigned int ifnum; | |
622 | ||
623 | usb_lock_device(dev); | |
4a2a8a2c AS |
624 | |
625 | /* Protect against simultaneous open */ | |
626 | mutex_lock(&usbfs_mutex); | |
1da177e4 | 627 | list_del_init(&ps->list); |
4a2a8a2c AS |
628 | mutex_unlock(&usbfs_mutex); |
629 | ||
1da177e4 LT |
630 | for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed); |
631 | ifnum++) { | |
632 | if (test_bit(ifnum, &ps->ifclaimed)) | |
633 | releaseintf(ps, ifnum); | |
634 | } | |
635 | destroy_all_async(ps); | |
94fcda1f | 636 | usb_autosuspend_device(dev); |
1da177e4 LT |
637 | usb_unlock_device(dev); |
638 | usb_put_dev(dev); | |
2425c08b | 639 | put_pid(ps->disc_pid); |
1da177e4 | 640 | kfree(ps); |
4a2a8a2c | 641 | return 0; |
1da177e4 LT |
642 | } |
643 | ||
644 | static int proc_control(struct dev_state *ps, void __user *arg) | |
645 | { | |
646 | struct usb_device *dev = ps->dev; | |
647 | struct usbdevfs_ctrltransfer ctrl; | |
648 | unsigned int tmo; | |
649 | unsigned char *tbuf; | |
ff66e3ce | 650 | unsigned wLength; |
1da177e4 LT |
651 | int i, j, ret; |
652 | ||
653 | if (copy_from_user(&ctrl, arg, sizeof(ctrl))) | |
654 | return -EFAULT; | |
04e482ff GKH |
655 | ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.wIndex); |
656 | if (ret) | |
1da177e4 | 657 | return ret; |
ff66e3ce AM |
658 | wLength = ctrl.wLength; /* To suppress 64k PAGE_SIZE warning */ |
659 | if (wLength > PAGE_SIZE) | |
1da177e4 | 660 | return -EINVAL; |
04e482ff GKH |
661 | tbuf = (unsigned char *)__get_free_page(GFP_KERNEL); |
662 | if (!tbuf) | |
1da177e4 LT |
663 | return -ENOMEM; |
664 | tmo = ctrl.timeout; | |
665 | if (ctrl.bRequestType & 0x80) { | |
04e482ff GKH |
666 | if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data, |
667 | ctrl.wLength)) { | |
1da177e4 LT |
668 | free_page((unsigned long)tbuf); |
669 | return -EINVAL; | |
670 | } | |
fe0410c7 AS |
671 | snoop(&dev->dev, "control read: bRequest=%02x " |
672 | "bRrequestType=%02x wValue=%04x " | |
673 | "wIndex=%04x wLength=%04x\n", | |
674 | ctrl.bRequest, ctrl.bRequestType, ctrl.wValue, | |
675 | ctrl.wIndex, ctrl.wLength); | |
1da177e4 LT |
676 | |
677 | usb_unlock_device(dev); | |
04e482ff GKH |
678 | i = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), ctrl.bRequest, |
679 | ctrl.bRequestType, ctrl.wValue, ctrl.wIndex, | |
680 | tbuf, ctrl.wLength, tmo); | |
1da177e4 LT |
681 | usb_lock_device(dev); |
682 | if ((i > 0) && ctrl.wLength) { | |
683 | if (usbfs_snoop) { | |
684 | dev_info(&dev->dev, "control read: data "); | |
fe0410c7 | 685 | for (j = 0; j < i; ++j) |
04e482ff | 686 | printk("%02x ", (u8)(tbuf)[j]); |
1da177e4 LT |
687 | printk("\n"); |
688 | } | |
fe0410c7 | 689 | if (copy_to_user(ctrl.data, tbuf, i)) { |
1da177e4 LT |
690 | free_page((unsigned long)tbuf); |
691 | return -EFAULT; | |
692 | } | |
693 | } | |
694 | } else { | |
695 | if (ctrl.wLength) { | |
696 | if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) { | |
697 | free_page((unsigned long)tbuf); | |
698 | return -EFAULT; | |
699 | } | |
700 | } | |
fe0410c7 AS |
701 | snoop(&dev->dev, "control write: bRequest=%02x " |
702 | "bRrequestType=%02x wValue=%04x " | |
703 | "wIndex=%04x wLength=%04x\n", | |
704 | ctrl.bRequest, ctrl.bRequestType, ctrl.wValue, | |
705 | ctrl.wIndex, ctrl.wLength); | |
1da177e4 LT |
706 | if (usbfs_snoop) { |
707 | dev_info(&dev->dev, "control write: data: "); | |
708 | for (j = 0; j < ctrl.wLength; ++j) | |
e639dd3f | 709 | printk("%02x ", (unsigned char)(tbuf)[j]); |
1da177e4 LT |
710 | printk("\n"); |
711 | } | |
712 | usb_unlock_device(dev); | |
04e482ff GKH |
713 | i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest, |
714 | ctrl.bRequestType, ctrl.wValue, ctrl.wIndex, | |
715 | tbuf, ctrl.wLength, tmo); | |
1da177e4 LT |
716 | usb_lock_device(dev); |
717 | } | |
718 | free_page((unsigned long)tbuf); | |
04e482ff | 719 | if (i < 0 && i != -EPIPE) { |
1da177e4 LT |
720 | dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL " |
721 | "failed cmd %s rqt %u rq %u len %u ret %d\n", | |
722 | current->comm, ctrl.bRequestType, ctrl.bRequest, | |
723 | ctrl.wLength, i); | |
724 | } | |
725 | return i; | |
726 | } | |
727 | ||
728 | static int proc_bulk(struct dev_state *ps, void __user *arg) | |
729 | { | |
730 | struct usb_device *dev = ps->dev; | |
731 | struct usbdevfs_bulktransfer bulk; | |
732 | unsigned int tmo, len1, pipe; | |
733 | int len2; | |
734 | unsigned char *tbuf; | |
e639dd3f | 735 | int i, j, ret; |
1da177e4 LT |
736 | |
737 | if (copy_from_user(&bulk, arg, sizeof(bulk))) | |
738 | return -EFAULT; | |
04e482ff GKH |
739 | ret = findintfep(ps->dev, bulk.ep); |
740 | if (ret < 0) | |
1da177e4 | 741 | return ret; |
04e482ff GKH |
742 | ret = checkintf(ps, ret); |
743 | if (ret) | |
1da177e4 LT |
744 | return ret; |
745 | if (bulk.ep & USB_DIR_IN) | |
746 | pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f); | |
747 | else | |
748 | pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f); | |
749 | if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN))) | |
750 | return -EINVAL; | |
751 | len1 = bulk.len; | |
752 | if (len1 > MAX_USBFS_BUFFER_SIZE) | |
753 | return -EINVAL; | |
754 | if (!(tbuf = kmalloc(len1, GFP_KERNEL))) | |
755 | return -ENOMEM; | |
756 | tmo = bulk.timeout; | |
757 | if (bulk.ep & 0x80) { | |
758 | if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) { | |
759 | kfree(tbuf); | |
760 | return -EINVAL; | |
761 | } | |
e639dd3f GKH |
762 | snoop(&dev->dev, "bulk read: len=0x%02x timeout=%04d\n", |
763 | bulk.len, bulk.timeout); | |
1da177e4 LT |
764 | usb_unlock_device(dev); |
765 | i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo); | |
766 | usb_lock_device(dev); | |
767 | if (!i && len2) { | |
e639dd3f GKH |
768 | if (usbfs_snoop) { |
769 | dev_info(&dev->dev, "bulk read: data "); | |
770 | for (j = 0; j < len2; ++j) | |
04e482ff | 771 | printk("%02x ", (u8)(tbuf)[j]); |
e639dd3f GKH |
772 | printk("\n"); |
773 | } | |
1da177e4 LT |
774 | if (copy_to_user(bulk.data, tbuf, len2)) { |
775 | kfree(tbuf); | |
776 | return -EFAULT; | |
777 | } | |
778 | } | |
779 | } else { | |
780 | if (len1) { | |
781 | if (copy_from_user(tbuf, bulk.data, len1)) { | |
782 | kfree(tbuf); | |
783 | return -EFAULT; | |
784 | } | |
785 | } | |
e639dd3f GKH |
786 | snoop(&dev->dev, "bulk write: len=0x%02x timeout=%04d\n", |
787 | bulk.len, bulk.timeout); | |
788 | if (usbfs_snoop) { | |
789 | dev_info(&dev->dev, "bulk write: data: "); | |
790 | for (j = 0; j < len1; ++j) | |
791 | printk("%02x ", (unsigned char)(tbuf)[j]); | |
792 | printk("\n"); | |
793 | } | |
1da177e4 LT |
794 | usb_unlock_device(dev); |
795 | i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo); | |
796 | usb_lock_device(dev); | |
797 | } | |
798 | kfree(tbuf); | |
799 | if (i < 0) | |
800 | return i; | |
801 | return len2; | |
802 | } | |
803 | ||
804 | static int proc_resetep(struct dev_state *ps, void __user *arg) | |
805 | { | |
806 | unsigned int ep; | |
807 | int ret; | |
808 | ||
809 | if (get_user(ep, (unsigned int __user *)arg)) | |
810 | return -EFAULT; | |
04e482ff GKH |
811 | ret = findintfep(ps->dev, ep); |
812 | if (ret < 0) | |
1da177e4 | 813 | return ret; |
04e482ff GKH |
814 | ret = checkintf(ps, ret); |
815 | if (ret) | |
1da177e4 LT |
816 | return ret; |
817 | usb_settoggle(ps->dev, ep & 0xf, !(ep & USB_DIR_IN), 0); | |
818 | return 0; | |
819 | } | |
820 | ||
821 | static int proc_clearhalt(struct dev_state *ps, void __user *arg) | |
822 | { | |
823 | unsigned int ep; | |
824 | int pipe; | |
825 | int ret; | |
826 | ||
827 | if (get_user(ep, (unsigned int __user *)arg)) | |
828 | return -EFAULT; | |
04e482ff GKH |
829 | ret = findintfep(ps->dev, ep); |
830 | if (ret < 0) | |
1da177e4 | 831 | return ret; |
04e482ff GKH |
832 | ret = checkintf(ps, ret); |
833 | if (ret) | |
1da177e4 LT |
834 | return ret; |
835 | if (ep & USB_DIR_IN) | |
04e482ff GKH |
836 | pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f); |
837 | else | |
838 | pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f); | |
1da177e4 LT |
839 | |
840 | return usb_clear_halt(ps->dev, pipe); | |
841 | } | |
1da177e4 LT |
842 | |
843 | static int proc_getdriver(struct dev_state *ps, void __user *arg) | |
844 | { | |
845 | struct usbdevfs_getdriver gd; | |
846 | struct usb_interface *intf; | |
847 | int ret; | |
848 | ||
849 | if (copy_from_user(&gd, arg, sizeof(gd))) | |
850 | return -EFAULT; | |
1da177e4 LT |
851 | intf = usb_ifnum_to_if(ps->dev, gd.interface); |
852 | if (!intf || !intf->dev.driver) | |
853 | ret = -ENODATA; | |
854 | else { | |
855 | strncpy(gd.driver, intf->dev.driver->name, | |
856 | sizeof(gd.driver)); | |
857 | ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0); | |
858 | } | |
1da177e4 LT |
859 | return ret; |
860 | } | |
861 | ||
862 | static int proc_connectinfo(struct dev_state *ps, void __user *arg) | |
863 | { | |
864 | struct usbdevfs_connectinfo ci; | |
865 | ||
866 | ci.devnum = ps->dev->devnum; | |
867 | ci.slow = ps->dev->speed == USB_SPEED_LOW; | |
868 | if (copy_to_user(arg, &ci, sizeof(ci))) | |
869 | return -EFAULT; | |
870 | return 0; | |
871 | } | |
872 | ||
873 | static int proc_resetdevice(struct dev_state *ps) | |
874 | { | |
742120c6 | 875 | return usb_reset_device(ps->dev); |
1da177e4 LT |
876 | } |
877 | ||
878 | static int proc_setintf(struct dev_state *ps, void __user *arg) | |
879 | { | |
880 | struct usbdevfs_setinterface setintf; | |
881 | int ret; | |
882 | ||
883 | if (copy_from_user(&setintf, arg, sizeof(setintf))) | |
884 | return -EFAULT; | |
885 | if ((ret = checkintf(ps, setintf.interface))) | |
886 | return ret; | |
887 | return usb_set_interface(ps->dev, setintf.interface, | |
888 | setintf.altsetting); | |
889 | } | |
890 | ||
891 | static int proc_setconfig(struct dev_state *ps, void __user *arg) | |
892 | { | |
3f141e2a | 893 | int u; |
1da177e4 | 894 | int status = 0; |
04e482ff | 895 | struct usb_host_config *actconfig; |
1da177e4 | 896 | |
3f141e2a | 897 | if (get_user(u, (int __user *)arg)) |
1da177e4 LT |
898 | return -EFAULT; |
899 | ||
04e482ff GKH |
900 | actconfig = ps->dev->actconfig; |
901 | ||
902 | /* Don't touch the device if any interfaces are claimed. | |
903 | * It could interfere with other drivers' operations, and if | |
1da177e4 LT |
904 | * an interface is claimed by usbfs it could easily deadlock. |
905 | */ | |
04e482ff GKH |
906 | if (actconfig) { |
907 | int i; | |
908 | ||
909 | for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) { | |
910 | if (usb_interface_claimed(actconfig->interface[i])) { | |
911 | dev_warn(&ps->dev->dev, | |
72ebddb5 | 912 | "usbfs: interface %d claimed by %s " |
1da177e4 LT |
913 | "while '%s' sets config #%d\n", |
914 | actconfig->interface[i] | |
915 | ->cur_altsetting | |
916 | ->desc.bInterfaceNumber, | |
72ebddb5 DB |
917 | actconfig->interface[i] |
918 | ->dev.driver->name, | |
1da177e4 | 919 | current->comm, u); |
04e482ff | 920 | status = -EBUSY; |
1da177e4 | 921 | break; |
1da177e4 | 922 | } |
04e482ff GKH |
923 | } |
924 | } | |
1da177e4 LT |
925 | |
926 | /* SET_CONFIGURATION is often abused as a "cheap" driver reset, | |
927 | * so avoid usb_set_configuration()'s kick to sysfs | |
928 | */ | |
929 | if (status == 0) { | |
930 | if (actconfig && actconfig->desc.bConfigurationValue == u) | |
931 | status = usb_reset_configuration(ps->dev); | |
932 | else | |
933 | status = usb_set_configuration(ps->dev, u); | |
934 | } | |
935 | ||
936 | return status; | |
937 | } | |
938 | ||
1da177e4 | 939 | static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb, |
04e482ff GKH |
940 | struct usbdevfs_iso_packet_desc __user *iso_frame_desc, |
941 | void __user *arg) | |
1da177e4 LT |
942 | { |
943 | struct usbdevfs_iso_packet_desc *isopkt = NULL; | |
944 | struct usb_host_endpoint *ep; | |
945 | struct async *as; | |
946 | struct usb_ctrlrequest *dr = NULL; | |
947 | unsigned int u, totlen, isofrmlen; | |
97b9eb91 | 948 | int ret, ifnum = -1; |
93cf9b90 | 949 | int is_in; |
1da177e4 | 950 | |
14722ef4 AS |
951 | if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP | |
952 | USBDEVFS_URB_SHORT_NOT_OK | | |
953 | USBDEVFS_URB_NO_FSBR | | |
954 | USBDEVFS_URB_ZERO_PACKET | | |
955 | USBDEVFS_URB_NO_INTERRUPT)) | |
1da177e4 LT |
956 | return -EINVAL; |
957 | if (!uurb->buffer) | |
958 | return -EINVAL; | |
04e482ff GKH |
959 | if (uurb->signr != 0 && (uurb->signr < SIGRTMIN || |
960 | uurb->signr > SIGRTMAX)) | |
1da177e4 | 961 | return -EINVAL; |
04e482ff GKH |
962 | if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL && |
963 | (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) { | |
964 | ifnum = findintfep(ps->dev, uurb->endpoint); | |
965 | if (ifnum < 0) | |
1da177e4 | 966 | return ifnum; |
04e482ff GKH |
967 | ret = checkintf(ps, ifnum); |
968 | if (ret) | |
1da177e4 LT |
969 | return ret; |
970 | } | |
93cf9b90 AS |
971 | if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0) { |
972 | is_in = 1; | |
973 | ep = ps->dev->ep_in[uurb->endpoint & USB_ENDPOINT_NUMBER_MASK]; | |
974 | } else { | |
975 | is_in = 0; | |
976 | ep = ps->dev->ep_out[uurb->endpoint & USB_ENDPOINT_NUMBER_MASK]; | |
977 | } | |
1da177e4 LT |
978 | if (!ep) |
979 | return -ENOENT; | |
980 | switch(uurb->type) { | |
981 | case USBDEVFS_URB_TYPE_CONTROL: | |
93cf9b90 | 982 | if (!usb_endpoint_xfer_control(&ep->desc)) |
1da177e4 | 983 | return -EINVAL; |
04e482ff GKH |
984 | /* min 8 byte setup packet, |
985 | * max 8 byte setup plus an arbitrary data stage */ | |
986 | if (uurb->buffer_length < 8 || | |
987 | uurb->buffer_length > (8 + MAX_USBFS_BUFFER_SIZE)) | |
1da177e4 | 988 | return -EINVAL; |
04e482ff GKH |
989 | dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL); |
990 | if (!dr) | |
1da177e4 LT |
991 | return -ENOMEM; |
992 | if (copy_from_user(dr, uurb->buffer, 8)) { | |
993 | kfree(dr); | |
994 | return -EFAULT; | |
995 | } | |
996 | if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) { | |
997 | kfree(dr); | |
998 | return -EINVAL; | |
999 | } | |
04e482ff GKH |
1000 | ret = check_ctrlrecip(ps, dr->bRequestType, |
1001 | le16_to_cpup(&dr->wIndex)); | |
1002 | if (ret) { | |
1da177e4 LT |
1003 | kfree(dr); |
1004 | return ret; | |
1005 | } | |
1da177e4 LT |
1006 | uurb->number_of_packets = 0; |
1007 | uurb->buffer_length = le16_to_cpup(&dr->wLength); | |
1008 | uurb->buffer += 8; | |
93cf9b90 AS |
1009 | if ((dr->bRequestType & USB_DIR_IN) && uurb->buffer_length) { |
1010 | is_in = 1; | |
1011 | uurb->endpoint |= USB_DIR_IN; | |
1012 | } else { | |
1013 | is_in = 0; | |
1014 | uurb->endpoint &= ~USB_DIR_IN; | |
1015 | } | |
1016 | if (!access_ok(is_in ? VERIFY_WRITE : VERIFY_READ, | |
1017 | uurb->buffer, uurb->buffer_length)) { | |
1da177e4 LT |
1018 | kfree(dr); |
1019 | return -EFAULT; | |
1020 | } | |
df251b8b CF |
1021 | snoop(&ps->dev->dev, "control urb: bRequest=%02x " |
1022 | "bRrequestType=%02x wValue=%04x " | |
1023 | "wIndex=%04x wLength=%04x\n", | |
93cf9b90 AS |
1024 | dr->bRequest, dr->bRequestType, |
1025 | __le16_to_cpup(&dr->wValue), | |
1026 | __le16_to_cpup(&dr->wIndex), | |
1027 | __le16_to_cpup(&dr->wLength)); | |
1da177e4 LT |
1028 | break; |
1029 | ||
1030 | case USBDEVFS_URB_TYPE_BULK: | |
93cf9b90 | 1031 | switch (usb_endpoint_type(&ep->desc)) { |
1da177e4 LT |
1032 | case USB_ENDPOINT_XFER_CONTROL: |
1033 | case USB_ENDPOINT_XFER_ISOC: | |
1034 | return -EINVAL; | |
1035 | /* allow single-shot interrupt transfers, at bogus rates */ | |
1036 | } | |
1037 | uurb->number_of_packets = 0; | |
1038 | if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE) | |
1039 | return -EINVAL; | |
93cf9b90 AS |
1040 | if (!access_ok(is_in ? VERIFY_WRITE : VERIFY_READ, |
1041 | uurb->buffer, uurb->buffer_length)) | |
1da177e4 | 1042 | return -EFAULT; |
e639dd3f | 1043 | snoop(&ps->dev->dev, "bulk urb\n"); |
1da177e4 LT |
1044 | break; |
1045 | ||
1046 | case USBDEVFS_URB_TYPE_ISO: | |
1047 | /* arbitrary limit */ | |
04e482ff GKH |
1048 | if (uurb->number_of_packets < 1 || |
1049 | uurb->number_of_packets > 128) | |
1da177e4 | 1050 | return -EINVAL; |
93cf9b90 | 1051 | if (!usb_endpoint_xfer_isoc(&ep->desc)) |
1da177e4 | 1052 | return -EINVAL; |
04e482ff GKH |
1053 | isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * |
1054 | uurb->number_of_packets; | |
1da177e4 LT |
1055 | if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL))) |
1056 | return -ENOMEM; | |
1057 | if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) { | |
1058 | kfree(isopkt); | |
1059 | return -EFAULT; | |
1060 | } | |
1061 | for (totlen = u = 0; u < uurb->number_of_packets; u++) { | |
04e482ff GKH |
1062 | /* arbitrary limit, |
1063 | * sufficient for USB 2.0 high-bandwidth iso */ | |
3612242e | 1064 | if (isopkt[u].length > 8192) { |
1da177e4 LT |
1065 | kfree(isopkt); |
1066 | return -EINVAL; | |
1067 | } | |
1068 | totlen += isopkt[u].length; | |
1069 | } | |
1070 | if (totlen > 32768) { | |
1071 | kfree(isopkt); | |
1072 | return -EINVAL; | |
1073 | } | |
1074 | uurb->buffer_length = totlen; | |
e639dd3f | 1075 | snoop(&ps->dev->dev, "iso urb\n"); |
1da177e4 LT |
1076 | break; |
1077 | ||
1078 | case USBDEVFS_URB_TYPE_INTERRUPT: | |
1079 | uurb->number_of_packets = 0; | |
93cf9b90 | 1080 | if (!usb_endpoint_xfer_int(&ep->desc)) |
1da177e4 | 1081 | return -EINVAL; |
1da177e4 LT |
1082 | if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE) |
1083 | return -EINVAL; | |
93cf9b90 AS |
1084 | if (!access_ok(is_in ? VERIFY_WRITE : VERIFY_READ, |
1085 | uurb->buffer, uurb->buffer_length)) | |
1da177e4 | 1086 | return -EFAULT; |
e639dd3f | 1087 | snoop(&ps->dev->dev, "interrupt urb\n"); |
1da177e4 LT |
1088 | break; |
1089 | ||
1090 | default: | |
1091 | return -EINVAL; | |
1092 | } | |
04e482ff GKH |
1093 | as = alloc_async(uurb->number_of_packets); |
1094 | if (!as) { | |
6fd19f4b JJ |
1095 | kfree(isopkt); |
1096 | kfree(dr); | |
1da177e4 LT |
1097 | return -ENOMEM; |
1098 | } | |
04e482ff GKH |
1099 | as->urb->transfer_buffer = kmalloc(uurb->buffer_length, GFP_KERNEL); |
1100 | if (!as->urb->transfer_buffer) { | |
6fd19f4b JJ |
1101 | kfree(isopkt); |
1102 | kfree(dr); | |
1da177e4 LT |
1103 | free_async(as); |
1104 | return -ENOMEM; | |
1105 | } | |
04e482ff GKH |
1106 | as->urb->dev = ps->dev; |
1107 | as->urb->pipe = (uurb->type << 30) | | |
93cf9b90 AS |
1108 | __create_pipe(ps->dev, uurb->endpoint & 0xf) | |
1109 | (uurb->endpoint & USB_DIR_IN); | |
14722ef4 AS |
1110 | |
1111 | /* This tedious sequence is necessary because the URB_* flags | |
1112 | * are internal to the kernel and subject to change, whereas | |
1113 | * the USBDEVFS_URB_* flags are a user API and must not be changed. | |
1114 | */ | |
1115 | u = (is_in ? URB_DIR_IN : URB_DIR_OUT); | |
1116 | if (uurb->flags & USBDEVFS_URB_ISO_ASAP) | |
1117 | u |= URB_ISO_ASAP; | |
1118 | if (uurb->flags & USBDEVFS_URB_SHORT_NOT_OK) | |
1119 | u |= URB_SHORT_NOT_OK; | |
1120 | if (uurb->flags & USBDEVFS_URB_NO_FSBR) | |
1121 | u |= URB_NO_FSBR; | |
1122 | if (uurb->flags & USBDEVFS_URB_ZERO_PACKET) | |
1123 | u |= URB_ZERO_PACKET; | |
1124 | if (uurb->flags & USBDEVFS_URB_NO_INTERRUPT) | |
1125 | u |= URB_NO_INTERRUPT; | |
1126 | as->urb->transfer_flags = u; | |
1127 | ||
1da177e4 | 1128 | as->urb->transfer_buffer_length = uurb->buffer_length; |
04e482ff | 1129 | as->urb->setup_packet = (unsigned char *)dr; |
1da177e4 LT |
1130 | as->urb->start_frame = uurb->start_frame; |
1131 | as->urb->number_of_packets = uurb->number_of_packets; | |
97b9eb91 AS |
1132 | if (uurb->type == USBDEVFS_URB_TYPE_ISO || |
1133 | ps->dev->speed == USB_SPEED_HIGH) | |
1134 | as->urb->interval = 1 << min(15, ep->desc.bInterval - 1); | |
1135 | else | |
1136 | as->urb->interval = ep->desc.bInterval; | |
04e482ff GKH |
1137 | as->urb->context = as; |
1138 | as->urb->complete = async_completed; | |
1da177e4 LT |
1139 | for (totlen = u = 0; u < uurb->number_of_packets; u++) { |
1140 | as->urb->iso_frame_desc[u].offset = totlen; | |
1141 | as->urb->iso_frame_desc[u].length = isopkt[u].length; | |
1142 | totlen += isopkt[u].length; | |
1143 | } | |
6fd19f4b | 1144 | kfree(isopkt); |
1da177e4 | 1145 | as->ps = ps; |
04e482ff | 1146 | as->userurb = arg; |
1da177e4 LT |
1147 | if (uurb->endpoint & USB_DIR_IN) |
1148 | as->userbuffer = uurb->buffer; | |
1149 | else | |
1150 | as->userbuffer = NULL; | |
1151 | as->signr = uurb->signr; | |
1152 | as->ifnum = ifnum; | |
2425c08b | 1153 | as->pid = get_pid(task_pid(current)); |
46113830 HW |
1154 | as->uid = current->uid; |
1155 | as->euid = current->euid; | |
7a01955f | 1156 | security_task_getsecid(current, &as->secid); |
93cf9b90 AS |
1157 | if (!is_in) { |
1158 | if (copy_from_user(as->urb->transfer_buffer, uurb->buffer, | |
1159 | as->urb->transfer_buffer_length)) { | |
1da177e4 LT |
1160 | free_async(as); |
1161 | return -EFAULT; | |
1162 | } | |
1163 | } | |
e639dd3f | 1164 | snoop_urb(as->urb, as->userurb); |
04e482ff GKH |
1165 | async_newpending(as); |
1166 | if ((ret = usb_submit_urb(as->urb, GFP_KERNEL))) { | |
1167 | dev_printk(KERN_DEBUG, &ps->dev->dev, | |
1168 | "usbfs: usb_submit_urb returned %d\n", ret); | |
1169 | async_removepending(as); | |
1170 | free_async(as); | |
1171 | return ret; | |
1172 | } | |
1173 | return 0; | |
1da177e4 LT |
1174 | } |
1175 | ||
1176 | static int proc_submiturb(struct dev_state *ps, void __user *arg) | |
1177 | { | |
1178 | struct usbdevfs_urb uurb; | |
1179 | ||
1180 | if (copy_from_user(&uurb, arg, sizeof(uurb))) | |
1181 | return -EFAULT; | |
1182 | ||
04e482ff GKH |
1183 | return proc_do_submiturb(ps, &uurb, |
1184 | (((struct usbdevfs_urb __user *)arg)->iso_frame_desc), | |
1185 | arg); | |
1da177e4 LT |
1186 | } |
1187 | ||
1188 | static int proc_unlinkurb(struct dev_state *ps, void __user *arg) | |
1189 | { | |
1190 | struct async *as; | |
1191 | ||
1192 | as = async_getpending(ps, arg); | |
1193 | if (!as) | |
1194 | return -EINVAL; | |
1195 | usb_kill_urb(as->urb); | |
1196 | return 0; | |
1197 | } | |
1198 | ||
1199 | static int processcompl(struct async *as, void __user * __user *arg) | |
1200 | { | |
1201 | struct urb *urb = as->urb; | |
1202 | struct usbdevfs_urb __user *userurb = as->userurb; | |
1203 | void __user *addr = as->userurb; | |
1204 | unsigned int i; | |
1205 | ||
1206 | if (as->userbuffer) | |
04e482ff GKH |
1207 | if (copy_to_user(as->userbuffer, urb->transfer_buffer, |
1208 | urb->transfer_buffer_length)) | |
1da177e4 | 1209 | return -EFAULT; |
e015268d | 1210 | if (put_user(as->status, &userurb->status)) |
1da177e4 LT |
1211 | return -EFAULT; |
1212 | if (put_user(urb->actual_length, &userurb->actual_length)) | |
1213 | return -EFAULT; | |
1214 | if (put_user(urb->error_count, &userurb->error_count)) | |
1215 | return -EFAULT; | |
1216 | ||
93cf9b90 | 1217 | if (usb_endpoint_xfer_isoc(&urb->ep->desc)) { |
668a9541 CL |
1218 | for (i = 0; i < urb->number_of_packets; i++) { |
1219 | if (put_user(urb->iso_frame_desc[i].actual_length, | |
1220 | &userurb->iso_frame_desc[i].actual_length)) | |
1221 | return -EFAULT; | |
1222 | if (put_user(urb->iso_frame_desc[i].status, | |
1223 | &userurb->iso_frame_desc[i].status)) | |
1224 | return -EFAULT; | |
1225 | } | |
1da177e4 LT |
1226 | } |
1227 | ||
1228 | free_async(as); | |
1229 | ||
1230 | if (put_user(addr, (void __user * __user *)arg)) | |
1231 | return -EFAULT; | |
1232 | return 0; | |
1233 | } | |
1234 | ||
04e482ff | 1235 | static struct async *reap_as(struct dev_state *ps) |
1da177e4 | 1236 | { |
04e482ff | 1237 | DECLARE_WAITQUEUE(wait, current); |
1da177e4 LT |
1238 | struct async *as = NULL; |
1239 | struct usb_device *dev = ps->dev; | |
1240 | ||
1241 | add_wait_queue(&ps->wait, &wait); | |
1242 | for (;;) { | |
1243 | __set_current_state(TASK_INTERRUPTIBLE); | |
04e482ff GKH |
1244 | as = async_getcompleted(ps); |
1245 | if (as) | |
1da177e4 LT |
1246 | break; |
1247 | if (signal_pending(current)) | |
1248 | break; | |
1249 | usb_unlock_device(dev); | |
1250 | schedule(); | |
1251 | usb_lock_device(dev); | |
1252 | } | |
1253 | remove_wait_queue(&ps->wait, &wait); | |
1254 | set_current_state(TASK_RUNNING); | |
1255 | return as; | |
1256 | } | |
1257 | ||
1258 | static int proc_reapurb(struct dev_state *ps, void __user *arg) | |
1259 | { | |
1260 | struct async *as = reap_as(ps); | |
1261 | if (as) | |
1262 | return processcompl(as, (void __user * __user *)arg); | |
1263 | if (signal_pending(current)) | |
1264 | return -EINTR; | |
1265 | return -EIO; | |
1266 | } | |
1267 | ||
1268 | static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg) | |
1269 | { | |
1270 | struct async *as; | |
1271 | ||
1272 | if (!(as = async_getcompleted(ps))) | |
1273 | return -EAGAIN; | |
1274 | return processcompl(as, (void __user * __user *)arg); | |
1275 | } | |
1276 | ||
1277 | #ifdef CONFIG_COMPAT | |
1278 | ||
1279 | static int get_urb32(struct usbdevfs_urb *kurb, | |
1280 | struct usbdevfs_urb32 __user *uurb) | |
1281 | { | |
1282 | __u32 uptr; | |
1283 | if (get_user(kurb->type, &uurb->type) || | |
1284 | __get_user(kurb->endpoint, &uurb->endpoint) || | |
1285 | __get_user(kurb->status, &uurb->status) || | |
1286 | __get_user(kurb->flags, &uurb->flags) || | |
1287 | __get_user(kurb->buffer_length, &uurb->buffer_length) || | |
1288 | __get_user(kurb->actual_length, &uurb->actual_length) || | |
1289 | __get_user(kurb->start_frame, &uurb->start_frame) || | |
1290 | __get_user(kurb->number_of_packets, &uurb->number_of_packets) || | |
1291 | __get_user(kurb->error_count, &uurb->error_count) || | |
1292 | __get_user(kurb->signr, &uurb->signr)) | |
1293 | return -EFAULT; | |
1294 | ||
1295 | if (__get_user(uptr, &uurb->buffer)) | |
1296 | return -EFAULT; | |
1297 | kurb->buffer = compat_ptr(uptr); | |
1298 | if (__get_user(uptr, &uurb->buffer)) | |
1299 | return -EFAULT; | |
1300 | kurb->usercontext = compat_ptr(uptr); | |
1301 | ||
1302 | return 0; | |
1303 | } | |
1304 | ||
1305 | static int proc_submiturb_compat(struct dev_state *ps, void __user *arg) | |
1306 | { | |
1307 | struct usbdevfs_urb uurb; | |
1308 | ||
04e482ff | 1309 | if (get_urb32(&uurb, (struct usbdevfs_urb32 __user *)arg)) |
1da177e4 LT |
1310 | return -EFAULT; |
1311 | ||
04e482ff GKH |
1312 | return proc_do_submiturb(ps, &uurb, |
1313 | ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc, | |
1314 | arg); | |
1da177e4 LT |
1315 | } |
1316 | ||
1317 | static int processcompl_compat(struct async *as, void __user * __user *arg) | |
1318 | { | |
1319 | struct urb *urb = as->urb; | |
1320 | struct usbdevfs_urb32 __user *userurb = as->userurb; | |
1321 | void __user *addr = as->userurb; | |
1322 | unsigned int i; | |
1323 | ||
1324 | if (as->userbuffer) | |
04e482ff GKH |
1325 | if (copy_to_user(as->userbuffer, urb->transfer_buffer, |
1326 | urb->transfer_buffer_length)) | |
1da177e4 | 1327 | return -EFAULT; |
e015268d | 1328 | if (put_user(as->status, &userurb->status)) |
1da177e4 LT |
1329 | return -EFAULT; |
1330 | if (put_user(urb->actual_length, &userurb->actual_length)) | |
1331 | return -EFAULT; | |
1332 | if (put_user(urb->error_count, &userurb->error_count)) | |
1333 | return -EFAULT; | |
1334 | ||
93cf9b90 | 1335 | if (usb_endpoint_xfer_isoc(&urb->ep->desc)) { |
668a9541 CL |
1336 | for (i = 0; i < urb->number_of_packets; i++) { |
1337 | if (put_user(urb->iso_frame_desc[i].actual_length, | |
1338 | &userurb->iso_frame_desc[i].actual_length)) | |
1339 | return -EFAULT; | |
1340 | if (put_user(urb->iso_frame_desc[i].status, | |
1341 | &userurb->iso_frame_desc[i].status)) | |
1342 | return -EFAULT; | |
1343 | } | |
1da177e4 LT |
1344 | } |
1345 | ||
1346 | free_async(as); | |
c714de5d | 1347 | if (put_user(ptr_to_compat(addr), (u32 __user *)arg)) |
1da177e4 LT |
1348 | return -EFAULT; |
1349 | return 0; | |
1350 | } | |
1351 | ||
1352 | static int proc_reapurb_compat(struct dev_state *ps, void __user *arg) | |
1353 | { | |
1354 | struct async *as = reap_as(ps); | |
1355 | if (as) | |
1356 | return processcompl_compat(as, (void __user * __user *)arg); | |
1357 | if (signal_pending(current)) | |
1358 | return -EINTR; | |
1359 | return -EIO; | |
1360 | } | |
1361 | ||
1362 | static int proc_reapurbnonblock_compat(struct dev_state *ps, void __user *arg) | |
1363 | { | |
1364 | struct async *as; | |
1365 | ||
1da177e4 LT |
1366 | if (!(as = async_getcompleted(ps))) |
1367 | return -EAGAIN; | |
1da177e4 LT |
1368 | return processcompl_compat(as, (void __user * __user *)arg); |
1369 | } | |
1370 | ||
1371 | #endif | |
1372 | ||
1373 | static int proc_disconnectsignal(struct dev_state *ps, void __user *arg) | |
1374 | { | |
1375 | struct usbdevfs_disconnectsignal ds; | |
1376 | ||
1377 | if (copy_from_user(&ds, arg, sizeof(ds))) | |
1378 | return -EFAULT; | |
1379 | if (ds.signr != 0 && (ds.signr < SIGRTMIN || ds.signr > SIGRTMAX)) | |
1380 | return -EINVAL; | |
1381 | ps->discsignr = ds.signr; | |
1382 | ps->disccontext = ds.context; | |
1383 | return 0; | |
1384 | } | |
1385 | ||
1386 | static int proc_claiminterface(struct dev_state *ps, void __user *arg) | |
1387 | { | |
1388 | unsigned int ifnum; | |
1389 | ||
1390 | if (get_user(ifnum, (unsigned int __user *)arg)) | |
1391 | return -EFAULT; | |
1392 | return claimintf(ps, ifnum); | |
1393 | } | |
1394 | ||
1395 | static int proc_releaseinterface(struct dev_state *ps, void __user *arg) | |
1396 | { | |
1397 | unsigned int ifnum; | |
1398 | int ret; | |
1399 | ||
1400 | if (get_user(ifnum, (unsigned int __user *)arg)) | |
1401 | return -EFAULT; | |
1402 | if ((ret = releaseintf(ps, ifnum)) < 0) | |
1403 | return ret; | |
1404 | destroy_async_on_interface (ps, ifnum); | |
1405 | return 0; | |
1406 | } | |
1407 | ||
c36fc889 | 1408 | static int proc_ioctl(struct dev_state *ps, struct usbdevfs_ioctl *ctl) |
1da177e4 | 1409 | { |
1da177e4 LT |
1410 | int size; |
1411 | void *buf = NULL; | |
1412 | int retval = 0; | |
1413 | struct usb_interface *intf = NULL; | |
1414 | struct usb_driver *driver = NULL; | |
1da177e4 | 1415 | |
c36fc889 | 1416 | /* alloc buffer */ |
04e482ff GKH |
1417 | if ((size = _IOC_SIZE(ctl->ioctl_code)) > 0) { |
1418 | if ((buf = kmalloc(size, GFP_KERNEL)) == NULL) | |
1da177e4 | 1419 | return -ENOMEM; |
c36fc889 | 1420 | if ((_IOC_DIR(ctl->ioctl_code) & _IOC_WRITE)) { |
04e482ff | 1421 | if (copy_from_user(buf, ctl->data, size)) { |
6fd19f4b | 1422 | kfree(buf); |
1da177e4 LT |
1423 | return -EFAULT; |
1424 | } | |
1425 | } else { | |
04e482ff | 1426 | memset(buf, 0, size); |
1da177e4 LT |
1427 | } |
1428 | } | |
1429 | ||
349710c3 | 1430 | if (!connected(ps)) { |
6fd19f4b | 1431 | kfree(buf); |
1da177e4 LT |
1432 | return -ENODEV; |
1433 | } | |
1434 | ||
1435 | if (ps->dev->state != USB_STATE_CONFIGURED) | |
1436 | retval = -EHOSTUNREACH; | |
04e482ff GKH |
1437 | else if (!(intf = usb_ifnum_to_if(ps->dev, ctl->ifno))) |
1438 | retval = -EINVAL; | |
c36fc889 | 1439 | else switch (ctl->ioctl_code) { |
1da177e4 LT |
1440 | |
1441 | /* disconnect kernel driver from interface */ | |
1442 | case USBDEVFS_DISCONNECT: | |
1da177e4 LT |
1443 | if (intf->dev.driver) { |
1444 | driver = to_usb_driver(intf->dev.driver); | |
04e482ff | 1445 | dev_dbg(&intf->dev, "disconnect by usbfs\n"); |
1da177e4 LT |
1446 | usb_driver_release_interface(driver, intf); |
1447 | } else | |
1448 | retval = -ENODATA; | |
1da177e4 LT |
1449 | break; |
1450 | ||
1451 | /* let kernel drivers try to (re)bind to the interface */ | |
1452 | case USBDEVFS_CONNECT: | |
885e9747 AS |
1453 | if (!intf->dev.driver) |
1454 | retval = device_attach(&intf->dev); | |
1455 | else | |
1456 | retval = -EBUSY; | |
1da177e4 LT |
1457 | break; |
1458 | ||
1459 | /* talk directly to the interface's driver */ | |
1460 | default: | |
1da177e4 LT |
1461 | if (intf->dev.driver) |
1462 | driver = to_usb_driver(intf->dev.driver); | |
1463 | if (driver == NULL || driver->ioctl == NULL) { | |
1464 | retval = -ENOTTY; | |
1465 | } else { | |
04e482ff | 1466 | retval = driver->ioctl(intf, ctl->ioctl_code, buf); |
1da177e4 LT |
1467 | if (retval == -ENOIOCTLCMD) |
1468 | retval = -ENOTTY; | |
1469 | } | |
1da177e4 LT |
1470 | } |
1471 | ||
1472 | /* cleanup and return */ | |
1473 | if (retval >= 0 | |
04e482ff | 1474 | && (_IOC_DIR(ctl->ioctl_code) & _IOC_READ) != 0 |
1da177e4 | 1475 | && size > 0 |
04e482ff | 1476 | && copy_to_user(ctl->data, buf, size) != 0) |
1da177e4 | 1477 | retval = -EFAULT; |
6fd19f4b JJ |
1478 | |
1479 | kfree(buf); | |
1da177e4 LT |
1480 | return retval; |
1481 | } | |
1482 | ||
c36fc889 PZ |
1483 | static int proc_ioctl_default(struct dev_state *ps, void __user *arg) |
1484 | { | |
1485 | struct usbdevfs_ioctl ctrl; | |
1486 | ||
04e482ff | 1487 | if (copy_from_user(&ctrl, arg, sizeof(ctrl))) |
c36fc889 PZ |
1488 | return -EFAULT; |
1489 | return proc_ioctl(ps, &ctrl); | |
1490 | } | |
1491 | ||
1492 | #ifdef CONFIG_COMPAT | |
777da590 | 1493 | static int proc_ioctl_compat(struct dev_state *ps, compat_uptr_t arg) |
c36fc889 PZ |
1494 | { |
1495 | struct usbdevfs_ioctl32 __user *uioc; | |
1496 | struct usbdevfs_ioctl ctrl; | |
1497 | u32 udata; | |
1498 | ||
058120d7 | 1499 | uioc = compat_ptr((long)arg); |
c36fc889 PZ |
1500 | if (get_user(ctrl.ifno, &uioc->ifno) || |
1501 | get_user(ctrl.ioctl_code, &uioc->ioctl_code) || | |
1502 | __get_user(udata, &uioc->data)) | |
1503 | return -EFAULT; | |
1504 | ctrl.data = compat_ptr(udata); | |
1505 | ||
1506 | return proc_ioctl(ps, &ctrl); | |
1507 | } | |
1508 | #endif | |
1509 | ||
1da177e4 LT |
1510 | /* |
1511 | * NOTE: All requests here that have interface numbers as parameters | |
1512 | * are assuming that somehow the configuration has been prevented from | |
1513 | * changing. But there's no mechanism to ensure that... | |
1514 | */ | |
04e482ff GKH |
1515 | static int usbdev_ioctl(struct inode *inode, struct file *file, |
1516 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 1517 | { |
ec17cf1c | 1518 | struct dev_state *ps = file->private_data; |
1da177e4 LT |
1519 | struct usb_device *dev = ps->dev; |
1520 | void __user *p = (void __user *)arg; | |
1521 | int ret = -ENOTTY; | |
1522 | ||
1523 | if (!(file->f_mode & FMODE_WRITE)) | |
1524 | return -EPERM; | |
1525 | usb_lock_device(dev); | |
349710c3 | 1526 | if (!connected(ps)) { |
1da177e4 LT |
1527 | usb_unlock_device(dev); |
1528 | return -ENODEV; | |
1529 | } | |
1530 | ||
1531 | switch (cmd) { | |
1532 | case USBDEVFS_CONTROL: | |
441b62c1 | 1533 | snoop(&dev->dev, "%s: CONTROL\n", __func__); |
1da177e4 LT |
1534 | ret = proc_control(ps, p); |
1535 | if (ret >= 0) | |
1536 | inode->i_mtime = CURRENT_TIME; | |
1537 | break; | |
1538 | ||
1539 | case USBDEVFS_BULK: | |
441b62c1 | 1540 | snoop(&dev->dev, "%s: BULK\n", __func__); |
1da177e4 LT |
1541 | ret = proc_bulk(ps, p); |
1542 | if (ret >= 0) | |
1543 | inode->i_mtime = CURRENT_TIME; | |
1544 | break; | |
1545 | ||
1546 | case USBDEVFS_RESETEP: | |
441b62c1 | 1547 | snoop(&dev->dev, "%s: RESETEP\n", __func__); |
1da177e4 LT |
1548 | ret = proc_resetep(ps, p); |
1549 | if (ret >= 0) | |
1550 | inode->i_mtime = CURRENT_TIME; | |
1551 | break; | |
1552 | ||
1553 | case USBDEVFS_RESET: | |
441b62c1 | 1554 | snoop(&dev->dev, "%s: RESET\n", __func__); |
1da177e4 LT |
1555 | ret = proc_resetdevice(ps); |
1556 | break; | |
1557 | ||
1558 | case USBDEVFS_CLEAR_HALT: | |
441b62c1 | 1559 | snoop(&dev->dev, "%s: CLEAR_HALT\n", __func__); |
1da177e4 LT |
1560 | ret = proc_clearhalt(ps, p); |
1561 | if (ret >= 0) | |
1562 | inode->i_mtime = CURRENT_TIME; | |
1563 | break; | |
1564 | ||
1565 | case USBDEVFS_GETDRIVER: | |
441b62c1 | 1566 | snoop(&dev->dev, "%s: GETDRIVER\n", __func__); |
1da177e4 LT |
1567 | ret = proc_getdriver(ps, p); |
1568 | break; | |
1569 | ||
1570 | case USBDEVFS_CONNECTINFO: | |
441b62c1 | 1571 | snoop(&dev->dev, "%s: CONNECTINFO\n", __func__); |
1da177e4 LT |
1572 | ret = proc_connectinfo(ps, p); |
1573 | break; | |
1574 | ||
1575 | case USBDEVFS_SETINTERFACE: | |
441b62c1 | 1576 | snoop(&dev->dev, "%s: SETINTERFACE\n", __func__); |
1da177e4 LT |
1577 | ret = proc_setintf(ps, p); |
1578 | break; | |
1579 | ||
1580 | case USBDEVFS_SETCONFIGURATION: | |
441b62c1 | 1581 | snoop(&dev->dev, "%s: SETCONFIGURATION\n", __func__); |
1da177e4 LT |
1582 | ret = proc_setconfig(ps, p); |
1583 | break; | |
1584 | ||
1585 | case USBDEVFS_SUBMITURB: | |
441b62c1 | 1586 | snoop(&dev->dev, "%s: SUBMITURB\n", __func__); |
1da177e4 LT |
1587 | ret = proc_submiturb(ps, p); |
1588 | if (ret >= 0) | |
1589 | inode->i_mtime = CURRENT_TIME; | |
1590 | break; | |
1591 | ||
1592 | #ifdef CONFIG_COMPAT | |
1593 | ||
1594 | case USBDEVFS_SUBMITURB32: | |
441b62c1 | 1595 | snoop(&dev->dev, "%s: SUBMITURB32\n", __func__); |
1da177e4 LT |
1596 | ret = proc_submiturb_compat(ps, p); |
1597 | if (ret >= 0) | |
1598 | inode->i_mtime = CURRENT_TIME; | |
1599 | break; | |
1600 | ||
1601 | case USBDEVFS_REAPURB32: | |
441b62c1 | 1602 | snoop(&dev->dev, "%s: REAPURB32\n", __func__); |
1da177e4 LT |
1603 | ret = proc_reapurb_compat(ps, p); |
1604 | break; | |
1605 | ||
1606 | case USBDEVFS_REAPURBNDELAY32: | |
441b62c1 | 1607 | snoop(&dev->dev, "%s: REAPURBDELAY32\n", __func__); |
1da177e4 LT |
1608 | ret = proc_reapurbnonblock_compat(ps, p); |
1609 | break; | |
1610 | ||
c36fc889 | 1611 | case USBDEVFS_IOCTL32: |
441b62c1 | 1612 | snoop(&dev->dev, "%s: IOCTL\n", __func__); |
c714de5d | 1613 | ret = proc_ioctl_compat(ps, ptr_to_compat(p)); |
c36fc889 | 1614 | break; |
1da177e4 LT |
1615 | #endif |
1616 | ||
1617 | case USBDEVFS_DISCARDURB: | |
441b62c1 | 1618 | snoop(&dev->dev, "%s: DISCARDURB\n", __func__); |
1da177e4 LT |
1619 | ret = proc_unlinkurb(ps, p); |
1620 | break; | |
1621 | ||
1622 | case USBDEVFS_REAPURB: | |
441b62c1 | 1623 | snoop(&dev->dev, "%s: REAPURB\n", __func__); |
1da177e4 LT |
1624 | ret = proc_reapurb(ps, p); |
1625 | break; | |
1626 | ||
1627 | case USBDEVFS_REAPURBNDELAY: | |
441b62c1 | 1628 | snoop(&dev->dev, "%s: REAPURBDELAY\n", __func__); |
1da177e4 LT |
1629 | ret = proc_reapurbnonblock(ps, p); |
1630 | break; | |
1631 | ||
1632 | case USBDEVFS_DISCSIGNAL: | |
441b62c1 | 1633 | snoop(&dev->dev, "%s: DISCSIGNAL\n", __func__); |
1da177e4 LT |
1634 | ret = proc_disconnectsignal(ps, p); |
1635 | break; | |
1636 | ||
1637 | case USBDEVFS_CLAIMINTERFACE: | |
441b62c1 | 1638 | snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __func__); |
1da177e4 LT |
1639 | ret = proc_claiminterface(ps, p); |
1640 | break; | |
1641 | ||
1642 | case USBDEVFS_RELEASEINTERFACE: | |
441b62c1 | 1643 | snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __func__); |
1da177e4 LT |
1644 | ret = proc_releaseinterface(ps, p); |
1645 | break; | |
1646 | ||
1647 | case USBDEVFS_IOCTL: | |
441b62c1 | 1648 | snoop(&dev->dev, "%s: IOCTL\n", __func__); |
c36fc889 | 1649 | ret = proc_ioctl_default(ps, p); |
1da177e4 LT |
1650 | break; |
1651 | } | |
1652 | usb_unlock_device(dev); | |
1653 | if (ret >= 0) | |
1654 | inode->i_atime = CURRENT_TIME; | |
1655 | return ret; | |
1656 | } | |
1657 | ||
1658 | /* No kernel lock - fine */ | |
04e482ff GKH |
1659 | static unsigned int usbdev_poll(struct file *file, |
1660 | struct poll_table_struct *wait) | |
1da177e4 | 1661 | { |
ec17cf1c TK |
1662 | struct dev_state *ps = file->private_data; |
1663 | unsigned int mask = 0; | |
1da177e4 LT |
1664 | |
1665 | poll_wait(file, &ps->wait, wait); | |
1666 | if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed)) | |
1667 | mask |= POLLOUT | POLLWRNORM; | |
349710c3 | 1668 | if (!connected(ps)) |
1da177e4 LT |
1669 | mask |= POLLERR | POLLHUP; |
1670 | return mask; | |
1671 | } | |
1672 | ||
9f8b17e6 | 1673 | const struct file_operations usbdev_file_operations = { |
7e7654a9 | 1674 | .owner = THIS_MODULE, |
1da177e4 LT |
1675 | .llseek = usbdev_lseek, |
1676 | .read = usbdev_read, | |
1677 | .poll = usbdev_poll, | |
1678 | .ioctl = usbdev_ioctl, | |
1679 | .open = usbdev_open, | |
1680 | .release = usbdev_release, | |
1681 | }; | |
fbf82fd2 | 1682 | |
9f8b17e6 KS |
1683 | #ifdef CONFIG_USB_DEVICE_CLASS |
1684 | static struct class *usb_classdev_class; | |
1685 | ||
1686 | static int usb_classdev_add(struct usb_device *dev) | |
fbf82fd2 KS |
1687 | { |
1688 | int minor = ((dev->bus->busnum-1) * 128) + (dev->devnum-1); | |
1689 | ||
9f8b17e6 | 1690 | dev->usb_classdev = device_create(usb_classdev_class, &dev->dev, |
7bc3d635 | 1691 | MKDEV(USB_DEVICE_MAJOR, minor), |
fbf82fd2 | 1692 | "usbdev%d.%d", dev->bus->busnum, dev->devnum); |
9f8b17e6 KS |
1693 | if (IS_ERR(dev->usb_classdev)) |
1694 | return PTR_ERR(dev->usb_classdev); | |
fbf82fd2 | 1695 | |
27d39e26 | 1696 | return 0; |
fbf82fd2 KS |
1697 | } |
1698 | ||
9f8b17e6 | 1699 | static void usb_classdev_remove(struct usb_device *dev) |
fbf82fd2 | 1700 | { |
9f8b17e6 | 1701 | device_unregister(dev->usb_classdev); |
fbf82fd2 KS |
1702 | } |
1703 | ||
9f8b17e6 KS |
1704 | static int usb_classdev_notify(struct notifier_block *self, |
1705 | unsigned long action, void *dev) | |
a7b986b3 GKH |
1706 | { |
1707 | switch (action) { | |
1708 | case USB_DEVICE_ADD: | |
9f8b17e6 | 1709 | if (usb_classdev_add(dev)) |
27d39e26 | 1710 | return NOTIFY_BAD; |
a7b986b3 GKH |
1711 | break; |
1712 | case USB_DEVICE_REMOVE: | |
9f8b17e6 | 1713 | usb_classdev_remove(dev); |
a7b986b3 GKH |
1714 | break; |
1715 | } | |
1716 | return NOTIFY_OK; | |
1717 | } | |
1718 | ||
1719 | static struct notifier_block usbdev_nb = { | |
9f8b17e6 | 1720 | .notifier_call = usb_classdev_notify, |
a7b986b3 | 1721 | }; |
9f8b17e6 | 1722 | #endif |
a7b986b3 | 1723 | |
7e7654a9 | 1724 | static struct cdev usb_device_cdev; |
fbf82fd2 | 1725 | |
9f8b17e6 | 1726 | int __init usb_devio_init(void) |
fbf82fd2 KS |
1727 | { |
1728 | int retval; | |
1729 | ||
fad21bdf | 1730 | retval = register_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX, |
04e482ff | 1731 | "usb_device"); |
fbf82fd2 KS |
1732 | if (retval) { |
1733 | err("unable to register minors for usb_device"); | |
1734 | goto out; | |
1735 | } | |
9f8b17e6 | 1736 | cdev_init(&usb_device_cdev, &usbdev_file_operations); |
fad21bdf | 1737 | retval = cdev_add(&usb_device_cdev, USB_DEVICE_DEV, USB_DEVICE_MAX); |
fbf82fd2 KS |
1738 | if (retval) { |
1739 | err("unable to get usb_device major %d", USB_DEVICE_MAJOR); | |
a7b986b3 | 1740 | goto error_cdev; |
fbf82fd2 | 1741 | } |
9f8b17e6 KS |
1742 | #ifdef CONFIG_USB_DEVICE_CLASS |
1743 | usb_classdev_class = class_create(THIS_MODULE, "usb_device"); | |
1744 | if (IS_ERR(usb_classdev_class)) { | |
fbf82fd2 | 1745 | err("unable to register usb_device class"); |
9f8b17e6 KS |
1746 | retval = PTR_ERR(usb_classdev_class); |
1747 | cdev_del(&usb_device_cdev); | |
1748 | usb_classdev_class = NULL; | |
1749 | goto out; | |
fbf82fd2 KS |
1750 | } |
1751 | ||
a7b986b3 | 1752 | usb_register_notify(&usbdev_nb); |
9f8b17e6 | 1753 | #endif |
fbf82fd2 KS |
1754 | out: |
1755 | return retval; | |
a7b986b3 | 1756 | |
a7b986b3 GKH |
1757 | error_cdev: |
1758 | unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX); | |
1759 | goto out; | |
fbf82fd2 KS |
1760 | } |
1761 | ||
9f8b17e6 | 1762 | void usb_devio_cleanup(void) |
fbf82fd2 | 1763 | { |
9f8b17e6 | 1764 | #ifdef CONFIG_USB_DEVICE_CLASS |
a7b986b3 | 1765 | usb_unregister_notify(&usbdev_nb); |
9f8b17e6 KS |
1766 | class_destroy(usb_classdev_class); |
1767 | #endif | |
fbf82fd2 | 1768 | cdev_del(&usb_device_cdev); |
fad21bdf | 1769 | unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX); |
fbf82fd2 | 1770 | } |