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1da177e4 LT |
1 | /*****************************************************************************/ |
2 | ||
3 | /* | |
4 | * devio.c -- User space communication with USB devices. | |
5 | * | |
6 | * Copyright (C) 1999-2000 Thomas Sailer (sailer@ife.ee.ethz.ch) | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
21 | * | |
22 | * $Id: devio.c,v 1.7 2000/02/01 17:28:48 fliegl Exp $ | |
23 | * | |
24 | * This file implements the usbfs/x/y files, where | |
25 | * x is the bus number and y the device number. | |
26 | * | |
27 | * It allows user space programs/"drivers" to communicate directly | |
28 | * with USB devices without intervening kernel driver. | |
29 | * | |
30 | * Revision history | |
31 | * 22.12.1999 0.1 Initial release (split from proc_usb.c) | |
32 | * 04.01.2000 0.2 Turned into its own filesystem | |
46113830 HW |
33 | * 30.09.2005 0.3 Fix user-triggerable oops in async URB delivery |
34 | * (CAN-2005-3055) | |
1da177e4 LT |
35 | */ |
36 | ||
37 | /*****************************************************************************/ | |
38 | ||
39 | #include <linux/fs.h> | |
40 | #include <linux/mm.h> | |
41 | #include <linux/slab.h> | |
42 | #include <linux/smp_lock.h> | |
43 | #include <linux/signal.h> | |
44 | #include <linux/poll.h> | |
45 | #include <linux/module.h> | |
46 | #include <linux/usb.h> | |
47 | #include <linux/usbdevice_fs.h> | |
fbf82fd2 | 48 | #include <linux/cdev.h> |
a7b986b3 | 49 | #include <linux/notifier.h> |
7a01955f | 50 | #include <linux/security.h> |
1da177e4 LT |
51 | #include <asm/uaccess.h> |
52 | #include <asm/byteorder.h> | |
53 | #include <linux/moduleparam.h> | |
54 | ||
55 | #include "hcd.h" /* for usbcore internals */ | |
56 | #include "usb.h" | |
57 | ||
fbf82fd2 KS |
58 | #define USB_MAXBUS 64 |
59 | #define USB_DEVICE_MAX USB_MAXBUS * 128 | |
60 | static struct class *usb_device_class; | |
61 | ||
1da177e4 LT |
62 | struct async { |
63 | struct list_head asynclist; | |
64 | struct dev_state *ps; | |
46113830 HW |
65 | pid_t pid; |
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; | |
7a01955f | 72 | u32 secid; |
1da177e4 LT |
73 | }; |
74 | ||
75 | static int usbfs_snoop = 0; | |
76 | module_param (usbfs_snoop, bool, S_IRUGO | S_IWUSR); | |
77 | MODULE_PARM_DESC (usbfs_snoop, "true to log all usbfs traffic"); | |
78 | ||
79 | #define snoop(dev, format, arg...) \ | |
80 | do { \ | |
81 | if (usbfs_snoop) \ | |
82 | dev_info( dev , format , ## arg); \ | |
83 | } while (0) | |
84 | ||
fad21bdf AS |
85 | #define USB_DEVICE_DEV MKDEV(USB_DEVICE_MAJOR, 0) |
86 | ||
1da177e4 LT |
87 | |
88 | #define MAX_USBFS_BUFFER_SIZE 16384 | |
89 | ||
90 | static inline int connected (struct usb_device *dev) | |
91 | { | |
92 | return dev->state != USB_STATE_NOTATTACHED; | |
93 | } | |
94 | ||
95 | static loff_t usbdev_lseek(struct file *file, loff_t offset, int orig) | |
96 | { | |
97 | loff_t ret; | |
98 | ||
99 | lock_kernel(); | |
100 | ||
101 | switch (orig) { | |
102 | case 0: | |
103 | file->f_pos = offset; | |
104 | ret = file->f_pos; | |
105 | break; | |
106 | case 1: | |
107 | file->f_pos += offset; | |
108 | ret = file->f_pos; | |
109 | break; | |
110 | case 2: | |
111 | default: | |
112 | ret = -EINVAL; | |
113 | } | |
114 | ||
115 | unlock_kernel(); | |
116 | return ret; | |
117 | } | |
118 | ||
119 | static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos) | |
120 | { | |
121 | struct dev_state *ps = (struct dev_state *)file->private_data; | |
122 | struct usb_device *dev = ps->dev; | |
123 | ssize_t ret = 0; | |
124 | unsigned len; | |
125 | loff_t pos; | |
126 | int i; | |
127 | ||
128 | pos = *ppos; | |
129 | usb_lock_device(dev); | |
130 | if (!connected(dev)) { | |
131 | ret = -ENODEV; | |
132 | goto err; | |
133 | } else if (pos < 0) { | |
134 | ret = -EINVAL; | |
135 | goto err; | |
136 | } | |
137 | ||
138 | if (pos < sizeof(struct usb_device_descriptor)) { | |
8781ba0a ON |
139 | struct usb_device_descriptor temp_desc ; /* 18 bytes - fits on the stack */ |
140 | ||
141 | memcpy(&temp_desc, &dev->descriptor, sizeof(dev->descriptor)); | |
9fcd5c32 AM |
142 | le16_to_cpus(&temp_desc.bcdUSB); |
143 | le16_to_cpus(&temp_desc.idVendor); | |
144 | le16_to_cpus(&temp_desc.idProduct); | |
145 | le16_to_cpus(&temp_desc.bcdDevice); | |
1da177e4 LT |
146 | |
147 | len = sizeof(struct usb_device_descriptor) - pos; | |
148 | if (len > nbytes) | |
149 | len = nbytes; | |
8781ba0a | 150 | if (copy_to_user(buf, ((char *)&temp_desc) + pos, len)) { |
1da177e4 LT |
151 | ret = -EFAULT; |
152 | goto err; | |
153 | } | |
1da177e4 LT |
154 | |
155 | *ppos += len; | |
156 | buf += len; | |
157 | nbytes -= len; | |
158 | ret += len; | |
159 | } | |
160 | ||
161 | pos = sizeof(struct usb_device_descriptor); | |
162 | for (i = 0; nbytes && i < dev->descriptor.bNumConfigurations; i++) { | |
163 | struct usb_config_descriptor *config = | |
164 | (struct usb_config_descriptor *)dev->rawdescriptors[i]; | |
165 | unsigned int length = le16_to_cpu(config->wTotalLength); | |
166 | ||
167 | if (*ppos < pos + length) { | |
168 | ||
169 | /* The descriptor may claim to be longer than it | |
170 | * really is. Here is the actual allocated length. */ | |
171 | unsigned alloclen = | |
172 | le16_to_cpu(dev->config[i].desc.wTotalLength); | |
173 | ||
174 | len = length - (*ppos - pos); | |
175 | if (len > nbytes) | |
176 | len = nbytes; | |
177 | ||
178 | /* Simply don't write (skip over) unallocated parts */ | |
179 | if (alloclen > (*ppos - pos)) { | |
180 | alloclen -= (*ppos - pos); | |
181 | if (copy_to_user(buf, | |
182 | dev->rawdescriptors[i] + (*ppos - pos), | |
183 | min(len, alloclen))) { | |
184 | ret = -EFAULT; | |
185 | goto err; | |
186 | } | |
187 | } | |
188 | ||
189 | *ppos += len; | |
190 | buf += len; | |
191 | nbytes -= len; | |
192 | ret += len; | |
193 | } | |
194 | ||
195 | pos += length; | |
196 | } | |
197 | ||
198 | err: | |
199 | usb_unlock_device(dev); | |
200 | return ret; | |
201 | } | |
202 | ||
203 | /* | |
204 | * async list handling | |
205 | */ | |
206 | ||
207 | static struct async *alloc_async(unsigned int numisoframes) | |
208 | { | |
209 | unsigned int assize = sizeof(struct async) + numisoframes * sizeof(struct usb_iso_packet_descriptor); | |
0a1ef3b5 AS |
210 | struct async *as = kzalloc(assize, GFP_KERNEL); |
211 | ||
1da177e4 LT |
212 | if (!as) |
213 | return NULL; | |
1da177e4 LT |
214 | as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL); |
215 | if (!as->urb) { | |
216 | kfree(as); | |
217 | return NULL; | |
218 | } | |
219 | return as; | |
220 | } | |
221 | ||
222 | static void free_async(struct async *as) | |
223 | { | |
6fd19f4b JJ |
224 | kfree(as->urb->transfer_buffer); |
225 | kfree(as->urb->setup_packet); | |
1da177e4 | 226 | usb_free_urb(as->urb); |
6fd19f4b | 227 | kfree(as); |
1da177e4 LT |
228 | } |
229 | ||
230 | static inline void async_newpending(struct async *as) | |
231 | { | |
232 | struct dev_state *ps = as->ps; | |
233 | unsigned long flags; | |
234 | ||
235 | spin_lock_irqsave(&ps->lock, flags); | |
236 | list_add_tail(&as->asynclist, &ps->async_pending); | |
237 | spin_unlock_irqrestore(&ps->lock, flags); | |
238 | } | |
239 | ||
240 | static inline void async_removepending(struct async *as) | |
241 | { | |
242 | struct dev_state *ps = as->ps; | |
243 | unsigned long flags; | |
244 | ||
245 | spin_lock_irqsave(&ps->lock, flags); | |
246 | list_del_init(&as->asynclist); | |
247 | spin_unlock_irqrestore(&ps->lock, flags); | |
248 | } | |
249 | ||
250 | static inline struct async *async_getcompleted(struct dev_state *ps) | |
251 | { | |
252 | unsigned long flags; | |
253 | struct async *as = NULL; | |
254 | ||
255 | spin_lock_irqsave(&ps->lock, flags); | |
256 | if (!list_empty(&ps->async_completed)) { | |
257 | as = list_entry(ps->async_completed.next, struct async, asynclist); | |
258 | list_del_init(&as->asynclist); | |
259 | } | |
260 | spin_unlock_irqrestore(&ps->lock, flags); | |
261 | return as; | |
262 | } | |
263 | ||
264 | static inline struct async *async_getpending(struct dev_state *ps, void __user *userurb) | |
265 | { | |
266 | unsigned long flags; | |
267 | struct async *as; | |
268 | ||
269 | spin_lock_irqsave(&ps->lock, flags); | |
270 | list_for_each_entry(as, &ps->async_pending, asynclist) | |
271 | if (as->userurb == userurb) { | |
272 | list_del_init(&as->asynclist); | |
273 | spin_unlock_irqrestore(&ps->lock, flags); | |
274 | return as; | |
275 | } | |
276 | spin_unlock_irqrestore(&ps->lock, flags); | |
277 | return NULL; | |
278 | } | |
279 | ||
e639dd3f GKH |
280 | static void snoop_urb(struct urb *urb, void __user *userurb) |
281 | { | |
282 | int j; | |
283 | unsigned char *data = urb->transfer_buffer; | |
284 | ||
285 | if (!usbfs_snoop) | |
286 | return; | |
287 | ||
288 | if (urb->pipe & USB_DIR_IN) | |
289 | dev_info(&urb->dev->dev, "direction=IN\n"); | |
290 | else | |
291 | dev_info(&urb->dev->dev, "direction=OUT\n"); | |
292 | dev_info(&urb->dev->dev, "userurb=%p\n", userurb); | |
293 | dev_info(&urb->dev->dev, "transfer_buffer_length=%d\n", | |
294 | urb->transfer_buffer_length); | |
295 | dev_info(&urb->dev->dev, "actual_length=%d\n", urb->actual_length); | |
296 | dev_info(&urb->dev->dev, "data: "); | |
297 | for (j = 0; j < urb->transfer_buffer_length; ++j) | |
298 | printk ("%02x ", data[j]); | |
299 | printk("\n"); | |
300 | } | |
301 | ||
1da177e4 LT |
302 | static void async_completed(struct urb *urb, struct pt_regs *regs) |
303 | { | |
304 | struct async *as = (struct async *)urb->context; | |
305 | struct dev_state *ps = as->ps; | |
306 | struct siginfo sinfo; | |
307 | ||
308 | spin_lock(&ps->lock); | |
309 | list_move_tail(&as->asynclist, &ps->async_completed); | |
310 | spin_unlock(&ps->lock); | |
311 | if (as->signr) { | |
312 | sinfo.si_signo = as->signr; | |
313 | sinfo.si_errno = as->urb->status; | |
314 | sinfo.si_code = SI_ASYNCIO; | |
315 | sinfo.si_addr = as->userurb; | |
46113830 | 316 | kill_proc_info_as_uid(as->signr, &sinfo, as->pid, as->uid, |
7a01955f | 317 | as->euid, as->secid); |
1da177e4 | 318 | } |
e639dd3f GKH |
319 | snoop(&urb->dev->dev, "urb complete\n"); |
320 | snoop_urb(urb, as->userurb); | |
321 | wake_up(&ps->wait); | |
1da177e4 LT |
322 | } |
323 | ||
324 | static void destroy_async (struct dev_state *ps, struct list_head *list) | |
325 | { | |
326 | struct async *as; | |
327 | unsigned long flags; | |
328 | ||
329 | spin_lock_irqsave(&ps->lock, flags); | |
330 | while (!list_empty(list)) { | |
331 | as = list_entry(list->next, struct async, asynclist); | |
332 | list_del_init(&as->asynclist); | |
333 | ||
334 | /* drop the spinlock so the completion handler can run */ | |
335 | spin_unlock_irqrestore(&ps->lock, flags); | |
336 | usb_kill_urb(as->urb); | |
337 | spin_lock_irqsave(&ps->lock, flags); | |
338 | } | |
339 | spin_unlock_irqrestore(&ps->lock, flags); | |
340 | as = async_getcompleted(ps); | |
341 | while (as) { | |
342 | free_async(as); | |
343 | as = async_getcompleted(ps); | |
344 | } | |
345 | } | |
346 | ||
347 | static void destroy_async_on_interface (struct dev_state *ps, unsigned int ifnum) | |
348 | { | |
349 | struct list_head *p, *q, hitlist; | |
350 | unsigned long flags; | |
351 | ||
352 | INIT_LIST_HEAD(&hitlist); | |
353 | spin_lock_irqsave(&ps->lock, flags); | |
354 | list_for_each_safe(p, q, &ps->async_pending) | |
355 | if (ifnum == list_entry(p, struct async, asynclist)->ifnum) | |
356 | list_move_tail(p, &hitlist); | |
357 | spin_unlock_irqrestore(&ps->lock, flags); | |
358 | destroy_async(ps, &hitlist); | |
359 | } | |
360 | ||
361 | static inline void destroy_all_async(struct dev_state *ps) | |
362 | { | |
363 | destroy_async(ps, &ps->async_pending); | |
364 | } | |
365 | ||
366 | /* | |
367 | * interface claims are made only at the request of user level code, | |
368 | * which can also release them (explicitly or by closing files). | |
369 | * they're also undone when devices disconnect. | |
370 | */ | |
371 | ||
372 | static int driver_probe (struct usb_interface *intf, | |
373 | const struct usb_device_id *id) | |
374 | { | |
375 | return -ENODEV; | |
376 | } | |
377 | ||
378 | static void driver_disconnect(struct usb_interface *intf) | |
379 | { | |
380 | struct dev_state *ps = usb_get_intfdata (intf); | |
381 | unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber; | |
382 | ||
383 | if (!ps) | |
384 | return; | |
385 | ||
386 | /* NOTE: this relies on usbcore having canceled and completed | |
387 | * all pending I/O requests; 2.6 does that. | |
388 | */ | |
389 | ||
390 | if (likely(ifnum < 8*sizeof(ps->ifclaimed))) | |
391 | clear_bit(ifnum, &ps->ifclaimed); | |
392 | else | |
393 | warn("interface number %u out of range", ifnum); | |
394 | ||
395 | usb_set_intfdata (intf, NULL); | |
396 | ||
397 | /* force async requests to complete */ | |
398 | destroy_async_on_interface(ps, ifnum); | |
399 | } | |
400 | ||
401 | struct usb_driver usbfs_driver = { | |
1da177e4 LT |
402 | .name = "usbfs", |
403 | .probe = driver_probe, | |
404 | .disconnect = driver_disconnect, | |
405 | }; | |
406 | ||
407 | static int claimintf(struct dev_state *ps, unsigned int ifnum) | |
408 | { | |
409 | struct usb_device *dev = ps->dev; | |
410 | struct usb_interface *intf; | |
411 | int err; | |
412 | ||
413 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
414 | return -EINVAL; | |
415 | /* already claimed */ | |
416 | if (test_bit(ifnum, &ps->ifclaimed)) | |
417 | return 0; | |
418 | ||
419 | /* lock against other changes to driver bindings */ | |
420 | down_write(&usb_bus_type.subsys.rwsem); | |
421 | intf = usb_ifnum_to_if(dev, ifnum); | |
422 | if (!intf) | |
423 | err = -ENOENT; | |
424 | else | |
425 | err = usb_driver_claim_interface(&usbfs_driver, intf, ps); | |
426 | up_write(&usb_bus_type.subsys.rwsem); | |
427 | if (err == 0) | |
428 | set_bit(ifnum, &ps->ifclaimed); | |
429 | return err; | |
430 | } | |
431 | ||
432 | static int releaseintf(struct dev_state *ps, unsigned int ifnum) | |
433 | { | |
434 | struct usb_device *dev; | |
435 | struct usb_interface *intf; | |
436 | int err; | |
437 | ||
438 | err = -EINVAL; | |
439 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
440 | return err; | |
441 | dev = ps->dev; | |
442 | /* lock against other changes to driver bindings */ | |
443 | down_write(&usb_bus_type.subsys.rwsem); | |
444 | intf = usb_ifnum_to_if(dev, ifnum); | |
445 | if (!intf) | |
446 | err = -ENOENT; | |
447 | else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) { | |
448 | usb_driver_release_interface(&usbfs_driver, intf); | |
449 | err = 0; | |
450 | } | |
451 | up_write(&usb_bus_type.subsys.rwsem); | |
452 | return err; | |
453 | } | |
454 | ||
455 | static int checkintf(struct dev_state *ps, unsigned int ifnum) | |
456 | { | |
457 | if (ps->dev->state != USB_STATE_CONFIGURED) | |
458 | return -EHOSTUNREACH; | |
459 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
460 | return -EINVAL; | |
461 | if (test_bit(ifnum, &ps->ifclaimed)) | |
462 | return 0; | |
463 | /* if not yet claimed, claim it for the driver */ | |
464 | dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim interface %u before use\n", | |
465 | current->pid, current->comm, ifnum); | |
466 | return claimintf(ps, ifnum); | |
467 | } | |
468 | ||
469 | static int findintfep(struct usb_device *dev, unsigned int ep) | |
470 | { | |
471 | unsigned int i, j, e; | |
472 | struct usb_interface *intf; | |
473 | struct usb_host_interface *alts; | |
474 | struct usb_endpoint_descriptor *endpt; | |
475 | ||
476 | if (ep & ~(USB_DIR_IN|0xf)) | |
477 | return -EINVAL; | |
478 | if (!dev->actconfig) | |
479 | return -ESRCH; | |
480 | for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) { | |
481 | intf = dev->actconfig->interface[i]; | |
482 | for (j = 0; j < intf->num_altsetting; j++) { | |
483 | alts = &intf->altsetting[j]; | |
484 | for (e = 0; e < alts->desc.bNumEndpoints; e++) { | |
485 | endpt = &alts->endpoint[e].desc; | |
486 | if (endpt->bEndpointAddress == ep) | |
487 | return alts->desc.bInterfaceNumber; | |
488 | } | |
489 | } | |
490 | } | |
491 | return -ENOENT; | |
492 | } | |
493 | ||
494 | static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype, unsigned int index) | |
495 | { | |
496 | int ret = 0; | |
497 | ||
24f8b116 HS |
498 | if (ps->dev->state != USB_STATE_ADDRESS |
499 | && ps->dev->state != USB_STATE_CONFIGURED) | |
1da177e4 LT |
500 | return -EHOSTUNREACH; |
501 | if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype)) | |
502 | return 0; | |
503 | ||
504 | index &= 0xff; | |
505 | switch (requesttype & USB_RECIP_MASK) { | |
506 | case USB_RECIP_ENDPOINT: | |
507 | if ((ret = findintfep(ps->dev, index)) >= 0) | |
508 | ret = checkintf(ps, ret); | |
509 | break; | |
510 | ||
511 | case USB_RECIP_INTERFACE: | |
512 | ret = checkintf(ps, index); | |
513 | break; | |
514 | } | |
515 | return ret; | |
516 | } | |
517 | ||
4592bf5a GKH |
518 | static struct usb_device *usbdev_lookup_minor(int minor) |
519 | { | |
cae74b30 GKH |
520 | struct class_device *class_dev; |
521 | struct usb_device *dev = NULL; | |
4592bf5a GKH |
522 | |
523 | down(&usb_device_class->sem); | |
cae74b30 GKH |
524 | list_for_each_entry(class_dev, &usb_device_class->children, node) { |
525 | if (class_dev->devt == MKDEV(USB_DEVICE_MAJOR, minor)) { | |
526 | dev = class_dev->class_data; | |
4592bf5a GKH |
527 | break; |
528 | } | |
529 | } | |
530 | up(&usb_device_class->sem); | |
531 | ||
cae74b30 | 532 | return dev; |
4592bf5a GKH |
533 | }; |
534 | ||
1da177e4 LT |
535 | /* |
536 | * file operations | |
537 | */ | |
538 | static int usbdev_open(struct inode *inode, struct file *file) | |
539 | { | |
fbf82fd2 | 540 | struct usb_device *dev = NULL; |
1da177e4 LT |
541 | struct dev_state *ps; |
542 | int ret; | |
543 | ||
544 | /* | |
545 | * no locking necessary here, as chrdev_open has the kernel lock | |
546 | * (still acquire the kernel lock for safety) | |
547 | */ | |
548 | ret = -ENOMEM; | |
549 | if (!(ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL))) | |
550 | goto out_nolock; | |
551 | ||
552 | lock_kernel(); | |
553 | ret = -ENOENT; | |
fbf82fd2 KS |
554 | /* check if we are called from a real node or usbfs */ |
555 | if (imajor(inode) == USB_DEVICE_MAJOR) | |
556 | dev = usbdev_lookup_minor(iminor(inode)); | |
557 | if (!dev) | |
8e18e294 | 558 | dev = inode->i_private; |
1da177e4 LT |
559 | if (!dev) { |
560 | kfree(ps); | |
561 | goto out; | |
562 | } | |
fbf82fd2 | 563 | usb_get_dev(dev); |
1da177e4 LT |
564 | ret = 0; |
565 | ps->dev = dev; | |
566 | ps->file = file; | |
567 | spin_lock_init(&ps->lock); | |
568 | INIT_LIST_HEAD(&ps->async_pending); | |
569 | INIT_LIST_HEAD(&ps->async_completed); | |
570 | init_waitqueue_head(&ps->wait); | |
571 | ps->discsignr = 0; | |
d7dd8a72 LT |
572 | ps->disc_pid = current->pid; |
573 | ps->disc_uid = current->uid; | |
574 | ps->disc_euid = current->euid; | |
1da177e4 LT |
575 | ps->disccontext = NULL; |
576 | ps->ifclaimed = 0; | |
7a01955f | 577 | security_task_getsecid(current, &ps->secid); |
1da177e4 LT |
578 | wmb(); |
579 | list_add_tail(&ps->list, &dev->filelist); | |
580 | file->private_data = ps; | |
581 | out: | |
582 | unlock_kernel(); | |
583 | out_nolock: | |
584 | return ret; | |
585 | } | |
586 | ||
587 | static int usbdev_release(struct inode *inode, struct file *file) | |
588 | { | |
589 | struct dev_state *ps = (struct dev_state *)file->private_data; | |
590 | struct usb_device *dev = ps->dev; | |
591 | unsigned int ifnum; | |
592 | ||
593 | usb_lock_device(dev); | |
594 | list_del_init(&ps->list); | |
595 | for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed); | |
596 | ifnum++) { | |
597 | if (test_bit(ifnum, &ps->ifclaimed)) | |
598 | releaseintf(ps, ifnum); | |
599 | } | |
600 | destroy_all_async(ps); | |
601 | usb_unlock_device(dev); | |
602 | usb_put_dev(dev); | |
603 | ps->dev = NULL; | |
604 | kfree(ps); | |
605 | return 0; | |
606 | } | |
607 | ||
608 | static int proc_control(struct dev_state *ps, void __user *arg) | |
609 | { | |
610 | struct usb_device *dev = ps->dev; | |
611 | struct usbdevfs_ctrltransfer ctrl; | |
612 | unsigned int tmo; | |
613 | unsigned char *tbuf; | |
614 | int i, j, ret; | |
615 | ||
616 | if (copy_from_user(&ctrl, arg, sizeof(ctrl))) | |
617 | return -EFAULT; | |
618 | if ((ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.wIndex))) | |
619 | return ret; | |
620 | if (ctrl.wLength > PAGE_SIZE) | |
621 | return -EINVAL; | |
622 | if (!(tbuf = (unsigned char *)__get_free_page(GFP_KERNEL))) | |
623 | return -ENOMEM; | |
624 | tmo = ctrl.timeout; | |
625 | if (ctrl.bRequestType & 0x80) { | |
626 | if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data, ctrl.wLength)) { | |
627 | free_page((unsigned long)tbuf); | |
628 | return -EINVAL; | |
629 | } | |
fe0410c7 AS |
630 | snoop(&dev->dev, "control read: bRequest=%02x " |
631 | "bRrequestType=%02x wValue=%04x " | |
632 | "wIndex=%04x wLength=%04x\n", | |
633 | ctrl.bRequest, ctrl.bRequestType, ctrl.wValue, | |
634 | ctrl.wIndex, ctrl.wLength); | |
1da177e4 LT |
635 | |
636 | usb_unlock_device(dev); | |
637 | i = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType, | |
638 | ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo); | |
639 | usb_lock_device(dev); | |
640 | if ((i > 0) && ctrl.wLength) { | |
641 | if (usbfs_snoop) { | |
642 | dev_info(&dev->dev, "control read: data "); | |
fe0410c7 | 643 | for (j = 0; j < i; ++j) |
e639dd3f | 644 | printk("%02x ", (unsigned char)(tbuf)[j]); |
1da177e4 LT |
645 | printk("\n"); |
646 | } | |
fe0410c7 | 647 | if (copy_to_user(ctrl.data, tbuf, i)) { |
1da177e4 LT |
648 | free_page((unsigned long)tbuf); |
649 | return -EFAULT; | |
650 | } | |
651 | } | |
652 | } else { | |
653 | if (ctrl.wLength) { | |
654 | if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) { | |
655 | free_page((unsigned long)tbuf); | |
656 | return -EFAULT; | |
657 | } | |
658 | } | |
fe0410c7 AS |
659 | snoop(&dev->dev, "control write: bRequest=%02x " |
660 | "bRrequestType=%02x wValue=%04x " | |
661 | "wIndex=%04x wLength=%04x\n", | |
662 | ctrl.bRequest, ctrl.bRequestType, ctrl.wValue, | |
663 | ctrl.wIndex, ctrl.wLength); | |
1da177e4 LT |
664 | if (usbfs_snoop) { |
665 | dev_info(&dev->dev, "control write: data: "); | |
666 | for (j = 0; j < ctrl.wLength; ++j) | |
e639dd3f | 667 | printk("%02x ", (unsigned char)(tbuf)[j]); |
1da177e4 LT |
668 | printk("\n"); |
669 | } | |
670 | usb_unlock_device(dev); | |
671 | i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType, | |
672 | ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo); | |
673 | usb_lock_device(dev); | |
674 | } | |
675 | free_page((unsigned long)tbuf); | |
676 | if (i<0 && i != -EPIPE) { | |
677 | dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL " | |
678 | "failed cmd %s rqt %u rq %u len %u ret %d\n", | |
679 | current->comm, ctrl.bRequestType, ctrl.bRequest, | |
680 | ctrl.wLength, i); | |
681 | } | |
682 | return i; | |
683 | } | |
684 | ||
685 | static int proc_bulk(struct dev_state *ps, void __user *arg) | |
686 | { | |
687 | struct usb_device *dev = ps->dev; | |
688 | struct usbdevfs_bulktransfer bulk; | |
689 | unsigned int tmo, len1, pipe; | |
690 | int len2; | |
691 | unsigned char *tbuf; | |
e639dd3f | 692 | int i, j, ret; |
1da177e4 LT |
693 | |
694 | if (copy_from_user(&bulk, arg, sizeof(bulk))) | |
695 | return -EFAULT; | |
696 | if ((ret = findintfep(ps->dev, bulk.ep)) < 0) | |
697 | return ret; | |
698 | if ((ret = checkintf(ps, ret))) | |
699 | return ret; | |
700 | if (bulk.ep & USB_DIR_IN) | |
701 | pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f); | |
702 | else | |
703 | pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f); | |
704 | if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN))) | |
705 | return -EINVAL; | |
706 | len1 = bulk.len; | |
707 | if (len1 > MAX_USBFS_BUFFER_SIZE) | |
708 | return -EINVAL; | |
709 | if (!(tbuf = kmalloc(len1, GFP_KERNEL))) | |
710 | return -ENOMEM; | |
711 | tmo = bulk.timeout; | |
712 | if (bulk.ep & 0x80) { | |
713 | if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) { | |
714 | kfree(tbuf); | |
715 | return -EINVAL; | |
716 | } | |
e639dd3f GKH |
717 | snoop(&dev->dev, "bulk read: len=0x%02x timeout=%04d\n", |
718 | bulk.len, bulk.timeout); | |
1da177e4 LT |
719 | usb_unlock_device(dev); |
720 | i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo); | |
721 | usb_lock_device(dev); | |
722 | if (!i && len2) { | |
e639dd3f GKH |
723 | if (usbfs_snoop) { |
724 | dev_info(&dev->dev, "bulk read: data "); | |
725 | for (j = 0; j < len2; ++j) | |
726 | printk("%02x ", (unsigned char)(tbuf)[j]); | |
727 | printk("\n"); | |
728 | } | |
1da177e4 LT |
729 | if (copy_to_user(bulk.data, tbuf, len2)) { |
730 | kfree(tbuf); | |
731 | return -EFAULT; | |
732 | } | |
733 | } | |
734 | } else { | |
735 | if (len1) { | |
736 | if (copy_from_user(tbuf, bulk.data, len1)) { | |
737 | kfree(tbuf); | |
738 | return -EFAULT; | |
739 | } | |
740 | } | |
e639dd3f GKH |
741 | snoop(&dev->dev, "bulk write: len=0x%02x timeout=%04d\n", |
742 | bulk.len, bulk.timeout); | |
743 | if (usbfs_snoop) { | |
744 | dev_info(&dev->dev, "bulk write: data: "); | |
745 | for (j = 0; j < len1; ++j) | |
746 | printk("%02x ", (unsigned char)(tbuf)[j]); | |
747 | printk("\n"); | |
748 | } | |
1da177e4 LT |
749 | usb_unlock_device(dev); |
750 | i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo); | |
751 | usb_lock_device(dev); | |
752 | } | |
753 | kfree(tbuf); | |
754 | if (i < 0) | |
755 | return i; | |
756 | return len2; | |
757 | } | |
758 | ||
759 | static int proc_resetep(struct dev_state *ps, void __user *arg) | |
760 | { | |
761 | unsigned int ep; | |
762 | int ret; | |
763 | ||
764 | if (get_user(ep, (unsigned int __user *)arg)) | |
765 | return -EFAULT; | |
766 | if ((ret = findintfep(ps->dev, ep)) < 0) | |
767 | return ret; | |
768 | if ((ret = checkintf(ps, ret))) | |
769 | return ret; | |
770 | usb_settoggle(ps->dev, ep & 0xf, !(ep & USB_DIR_IN), 0); | |
771 | return 0; | |
772 | } | |
773 | ||
774 | static int proc_clearhalt(struct dev_state *ps, void __user *arg) | |
775 | { | |
776 | unsigned int ep; | |
777 | int pipe; | |
778 | int ret; | |
779 | ||
780 | if (get_user(ep, (unsigned int __user *)arg)) | |
781 | return -EFAULT; | |
782 | if ((ret = findintfep(ps->dev, ep)) < 0) | |
783 | return ret; | |
784 | if ((ret = checkintf(ps, ret))) | |
785 | return ret; | |
786 | if (ep & USB_DIR_IN) | |
787 | pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f); | |
788 | else | |
789 | pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f); | |
790 | ||
791 | return usb_clear_halt(ps->dev, pipe); | |
792 | } | |
793 | ||
794 | ||
795 | static int proc_getdriver(struct dev_state *ps, void __user *arg) | |
796 | { | |
797 | struct usbdevfs_getdriver gd; | |
798 | struct usb_interface *intf; | |
799 | int ret; | |
800 | ||
801 | if (copy_from_user(&gd, arg, sizeof(gd))) | |
802 | return -EFAULT; | |
803 | down_read(&usb_bus_type.subsys.rwsem); | |
804 | intf = usb_ifnum_to_if(ps->dev, gd.interface); | |
805 | if (!intf || !intf->dev.driver) | |
806 | ret = -ENODATA; | |
807 | else { | |
808 | strncpy(gd.driver, intf->dev.driver->name, | |
809 | sizeof(gd.driver)); | |
810 | ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0); | |
811 | } | |
812 | up_read(&usb_bus_type.subsys.rwsem); | |
813 | return ret; | |
814 | } | |
815 | ||
816 | static int proc_connectinfo(struct dev_state *ps, void __user *arg) | |
817 | { | |
818 | struct usbdevfs_connectinfo ci; | |
819 | ||
820 | ci.devnum = ps->dev->devnum; | |
821 | ci.slow = ps->dev->speed == USB_SPEED_LOW; | |
822 | if (copy_to_user(arg, &ci, sizeof(ci))) | |
823 | return -EFAULT; | |
824 | return 0; | |
825 | } | |
826 | ||
827 | static int proc_resetdevice(struct dev_state *ps) | |
828 | { | |
79efa097 | 829 | return usb_reset_composite_device(ps->dev, NULL); |
1da177e4 LT |
830 | } |
831 | ||
832 | static int proc_setintf(struct dev_state *ps, void __user *arg) | |
833 | { | |
834 | struct usbdevfs_setinterface setintf; | |
835 | int ret; | |
836 | ||
837 | if (copy_from_user(&setintf, arg, sizeof(setintf))) | |
838 | return -EFAULT; | |
839 | if ((ret = checkintf(ps, setintf.interface))) | |
840 | return ret; | |
841 | return usb_set_interface(ps->dev, setintf.interface, | |
842 | setintf.altsetting); | |
843 | } | |
844 | ||
845 | static int proc_setconfig(struct dev_state *ps, void __user *arg) | |
846 | { | |
847 | unsigned int u; | |
848 | int status = 0; | |
849 | struct usb_host_config *actconfig; | |
850 | ||
851 | if (get_user(u, (unsigned int __user *)arg)) | |
852 | return -EFAULT; | |
853 | ||
854 | actconfig = ps->dev->actconfig; | |
855 | ||
856 | /* Don't touch the device if any interfaces are claimed. | |
857 | * It could interfere with other drivers' operations, and if | |
858 | * an interface is claimed by usbfs it could easily deadlock. | |
859 | */ | |
860 | if (actconfig) { | |
861 | int i; | |
862 | ||
863 | for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) { | |
864 | if (usb_interface_claimed(actconfig->interface[i])) { | |
865 | dev_warn (&ps->dev->dev, | |
72ebddb5 | 866 | "usbfs: interface %d claimed by %s " |
1da177e4 LT |
867 | "while '%s' sets config #%d\n", |
868 | actconfig->interface[i] | |
869 | ->cur_altsetting | |
870 | ->desc.bInterfaceNumber, | |
72ebddb5 DB |
871 | actconfig->interface[i] |
872 | ->dev.driver->name, | |
1da177e4 | 873 | current->comm, u); |
1da177e4 LT |
874 | status = -EBUSY; |
875 | break; | |
1da177e4 LT |
876 | } |
877 | } | |
878 | } | |
879 | ||
880 | /* SET_CONFIGURATION is often abused as a "cheap" driver reset, | |
881 | * so avoid usb_set_configuration()'s kick to sysfs | |
882 | */ | |
883 | if (status == 0) { | |
884 | if (actconfig && actconfig->desc.bConfigurationValue == u) | |
885 | status = usb_reset_configuration(ps->dev); | |
886 | else | |
887 | status = usb_set_configuration(ps->dev, u); | |
888 | } | |
889 | ||
890 | return status; | |
891 | } | |
892 | ||
1da177e4 LT |
893 | static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb, |
894 | struct usbdevfs_iso_packet_desc __user *iso_frame_desc, | |
895 | void __user *arg) | |
896 | { | |
897 | struct usbdevfs_iso_packet_desc *isopkt = NULL; | |
898 | struct usb_host_endpoint *ep; | |
899 | struct async *as; | |
900 | struct usb_ctrlrequest *dr = NULL; | |
901 | unsigned int u, totlen, isofrmlen; | |
902 | int ret, interval = 0, ifnum = -1; | |
903 | ||
904 | if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP|USBDEVFS_URB_SHORT_NOT_OK| | |
905 | URB_NO_FSBR|URB_ZERO_PACKET)) | |
906 | return -EINVAL; | |
907 | if (!uurb->buffer) | |
908 | return -EINVAL; | |
909 | if (uurb->signr != 0 && (uurb->signr < SIGRTMIN || uurb->signr > SIGRTMAX)) | |
910 | return -EINVAL; | |
911 | if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL && (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) { | |
912 | if ((ifnum = findintfep(ps->dev, uurb->endpoint)) < 0) | |
913 | return ifnum; | |
914 | if ((ret = checkintf(ps, ifnum))) | |
915 | return ret; | |
916 | } | |
917 | if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0) | |
918 | ep = ps->dev->ep_in [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK]; | |
919 | else | |
920 | ep = ps->dev->ep_out [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK]; | |
921 | if (!ep) | |
922 | return -ENOENT; | |
923 | switch(uurb->type) { | |
924 | case USBDEVFS_URB_TYPE_CONTROL: | |
925 | if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) | |
926 | != USB_ENDPOINT_XFER_CONTROL) | |
927 | return -EINVAL; | |
e016683d MD |
928 | /* min 8 byte setup packet, max 8 byte setup plus an arbitrary data stage */ |
929 | if (uurb->buffer_length < 8 || uurb->buffer_length > (8 + MAX_USBFS_BUFFER_SIZE)) | |
1da177e4 LT |
930 | return -EINVAL; |
931 | if (!(dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL))) | |
932 | return -ENOMEM; | |
933 | if (copy_from_user(dr, uurb->buffer, 8)) { | |
934 | kfree(dr); | |
935 | return -EFAULT; | |
936 | } | |
937 | if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) { | |
938 | kfree(dr); | |
939 | return -EINVAL; | |
940 | } | |
941 | if ((ret = check_ctrlrecip(ps, dr->bRequestType, le16_to_cpup(&dr->wIndex)))) { | |
942 | kfree(dr); | |
943 | return ret; | |
944 | } | |
945 | uurb->endpoint = (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) | (dr->bRequestType & USB_ENDPOINT_DIR_MASK); | |
946 | uurb->number_of_packets = 0; | |
947 | uurb->buffer_length = le16_to_cpup(&dr->wLength); | |
948 | uurb->buffer += 8; | |
949 | if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) { | |
950 | kfree(dr); | |
951 | return -EFAULT; | |
952 | } | |
e639dd3f | 953 | snoop(&ps->dev->dev, "control urb\n"); |
1da177e4 LT |
954 | break; |
955 | ||
956 | case USBDEVFS_URB_TYPE_BULK: | |
957 | switch (ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) { | |
958 | case USB_ENDPOINT_XFER_CONTROL: | |
959 | case USB_ENDPOINT_XFER_ISOC: | |
960 | return -EINVAL; | |
961 | /* allow single-shot interrupt transfers, at bogus rates */ | |
962 | } | |
963 | uurb->number_of_packets = 0; | |
964 | if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE) | |
965 | return -EINVAL; | |
966 | if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) | |
967 | return -EFAULT; | |
e639dd3f | 968 | snoop(&ps->dev->dev, "bulk urb\n"); |
1da177e4 LT |
969 | break; |
970 | ||
971 | case USBDEVFS_URB_TYPE_ISO: | |
972 | /* arbitrary limit */ | |
973 | if (uurb->number_of_packets < 1 || uurb->number_of_packets > 128) | |
974 | return -EINVAL; | |
975 | if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) | |
976 | != USB_ENDPOINT_XFER_ISOC) | |
977 | return -EINVAL; | |
978 | interval = 1 << min (15, ep->desc.bInterval - 1); | |
979 | isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * uurb->number_of_packets; | |
980 | if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL))) | |
981 | return -ENOMEM; | |
982 | if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) { | |
983 | kfree(isopkt); | |
984 | return -EFAULT; | |
985 | } | |
986 | for (totlen = u = 0; u < uurb->number_of_packets; u++) { | |
3612242e MD |
987 | /* arbitrary limit, sufficient for USB 2.0 high-bandwidth iso */ |
988 | if (isopkt[u].length > 8192) { | |
1da177e4 LT |
989 | kfree(isopkt); |
990 | return -EINVAL; | |
991 | } | |
992 | totlen += isopkt[u].length; | |
993 | } | |
994 | if (totlen > 32768) { | |
995 | kfree(isopkt); | |
996 | return -EINVAL; | |
997 | } | |
998 | uurb->buffer_length = totlen; | |
e639dd3f | 999 | snoop(&ps->dev->dev, "iso urb\n"); |
1da177e4 LT |
1000 | break; |
1001 | ||
1002 | case USBDEVFS_URB_TYPE_INTERRUPT: | |
1003 | uurb->number_of_packets = 0; | |
1004 | if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) | |
1005 | != USB_ENDPOINT_XFER_INT) | |
1006 | return -EINVAL; | |
1007 | if (ps->dev->speed == USB_SPEED_HIGH) | |
1008 | interval = 1 << min (15, ep->desc.bInterval - 1); | |
1009 | else | |
1010 | interval = ep->desc.bInterval; | |
1011 | if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE) | |
1012 | return -EINVAL; | |
1013 | if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) | |
1014 | return -EFAULT; | |
e639dd3f | 1015 | snoop(&ps->dev->dev, "interrupt urb\n"); |
1da177e4 LT |
1016 | break; |
1017 | ||
1018 | default: | |
1019 | return -EINVAL; | |
1020 | } | |
1021 | if (!(as = alloc_async(uurb->number_of_packets))) { | |
6fd19f4b JJ |
1022 | kfree(isopkt); |
1023 | kfree(dr); | |
1da177e4 LT |
1024 | return -ENOMEM; |
1025 | } | |
1026 | if (!(as->urb->transfer_buffer = kmalloc(uurb->buffer_length, GFP_KERNEL))) { | |
6fd19f4b JJ |
1027 | kfree(isopkt); |
1028 | kfree(dr); | |
1da177e4 LT |
1029 | free_async(as); |
1030 | return -ENOMEM; | |
1031 | } | |
1032 | as->urb->dev = ps->dev; | |
1033 | as->urb->pipe = (uurb->type << 30) | __create_pipe(ps->dev, uurb->endpoint & 0xf) | (uurb->endpoint & USB_DIR_IN); | |
1034 | as->urb->transfer_flags = uurb->flags; | |
1035 | as->urb->transfer_buffer_length = uurb->buffer_length; | |
1036 | as->urb->setup_packet = (unsigned char*)dr; | |
1037 | as->urb->start_frame = uurb->start_frame; | |
1038 | as->urb->number_of_packets = uurb->number_of_packets; | |
1039 | as->urb->interval = interval; | |
1040 | as->urb->context = as; | |
1041 | as->urb->complete = async_completed; | |
1042 | for (totlen = u = 0; u < uurb->number_of_packets; u++) { | |
1043 | as->urb->iso_frame_desc[u].offset = totlen; | |
1044 | as->urb->iso_frame_desc[u].length = isopkt[u].length; | |
1045 | totlen += isopkt[u].length; | |
1046 | } | |
6fd19f4b | 1047 | kfree(isopkt); |
1da177e4 LT |
1048 | as->ps = ps; |
1049 | as->userurb = arg; | |
1050 | if (uurb->endpoint & USB_DIR_IN) | |
1051 | as->userbuffer = uurb->buffer; | |
1052 | else | |
1053 | as->userbuffer = NULL; | |
1054 | as->signr = uurb->signr; | |
1055 | as->ifnum = ifnum; | |
46113830 HW |
1056 | as->pid = current->pid; |
1057 | as->uid = current->uid; | |
1058 | as->euid = current->euid; | |
7a01955f | 1059 | security_task_getsecid(current, &as->secid); |
1da177e4 LT |
1060 | if (!(uurb->endpoint & USB_DIR_IN)) { |
1061 | if (copy_from_user(as->urb->transfer_buffer, uurb->buffer, as->urb->transfer_buffer_length)) { | |
1062 | free_async(as); | |
1063 | return -EFAULT; | |
1064 | } | |
1065 | } | |
e639dd3f GKH |
1066 | snoop(&as->urb->dev->dev, "submit urb\n"); |
1067 | snoop_urb(as->urb, as->userurb); | |
1da177e4 LT |
1068 | async_newpending(as); |
1069 | if ((ret = usb_submit_urb(as->urb, GFP_KERNEL))) { | |
1070 | dev_printk(KERN_DEBUG, &ps->dev->dev, "usbfs: usb_submit_urb returned %d\n", ret); | |
1071 | async_removepending(as); | |
1072 | free_async(as); | |
1073 | return ret; | |
1074 | } | |
1075 | return 0; | |
1076 | } | |
1077 | ||
1078 | static int proc_submiturb(struct dev_state *ps, void __user *arg) | |
1079 | { | |
1080 | struct usbdevfs_urb uurb; | |
1081 | ||
1082 | if (copy_from_user(&uurb, arg, sizeof(uurb))) | |
1083 | return -EFAULT; | |
1084 | ||
83626b01 | 1085 | return proc_do_submiturb(ps, &uurb, (((struct usbdevfs_urb __user *)arg)->iso_frame_desc), arg); |
1da177e4 LT |
1086 | } |
1087 | ||
1088 | static int proc_unlinkurb(struct dev_state *ps, void __user *arg) | |
1089 | { | |
1090 | struct async *as; | |
1091 | ||
1092 | as = async_getpending(ps, arg); | |
1093 | if (!as) | |
1094 | return -EINVAL; | |
1095 | usb_kill_urb(as->urb); | |
1096 | return 0; | |
1097 | } | |
1098 | ||
1099 | static int processcompl(struct async *as, void __user * __user *arg) | |
1100 | { | |
1101 | struct urb *urb = as->urb; | |
1102 | struct usbdevfs_urb __user *userurb = as->userurb; | |
1103 | void __user *addr = as->userurb; | |
1104 | unsigned int i; | |
1105 | ||
1106 | if (as->userbuffer) | |
1107 | if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length)) | |
1108 | return -EFAULT; | |
1109 | if (put_user(urb->status, &userurb->status)) | |
1110 | return -EFAULT; | |
1111 | if (put_user(urb->actual_length, &userurb->actual_length)) | |
1112 | return -EFAULT; | |
1113 | if (put_user(urb->error_count, &userurb->error_count)) | |
1114 | return -EFAULT; | |
1115 | ||
668a9541 CL |
1116 | if (usb_pipeisoc(urb->pipe)) { |
1117 | for (i = 0; i < urb->number_of_packets; i++) { | |
1118 | if (put_user(urb->iso_frame_desc[i].actual_length, | |
1119 | &userurb->iso_frame_desc[i].actual_length)) | |
1120 | return -EFAULT; | |
1121 | if (put_user(urb->iso_frame_desc[i].status, | |
1122 | &userurb->iso_frame_desc[i].status)) | |
1123 | return -EFAULT; | |
1124 | } | |
1da177e4 LT |
1125 | } |
1126 | ||
1127 | free_async(as); | |
1128 | ||
1129 | if (put_user(addr, (void __user * __user *)arg)) | |
1130 | return -EFAULT; | |
1131 | return 0; | |
1132 | } | |
1133 | ||
1134 | static struct async* reap_as(struct dev_state *ps) | |
1135 | { | |
1136 | DECLARE_WAITQUEUE(wait, current); | |
1137 | struct async *as = NULL; | |
1138 | struct usb_device *dev = ps->dev; | |
1139 | ||
1140 | add_wait_queue(&ps->wait, &wait); | |
1141 | for (;;) { | |
1142 | __set_current_state(TASK_INTERRUPTIBLE); | |
1143 | if ((as = async_getcompleted(ps))) | |
1144 | break; | |
1145 | if (signal_pending(current)) | |
1146 | break; | |
1147 | usb_unlock_device(dev); | |
1148 | schedule(); | |
1149 | usb_lock_device(dev); | |
1150 | } | |
1151 | remove_wait_queue(&ps->wait, &wait); | |
1152 | set_current_state(TASK_RUNNING); | |
1153 | return as; | |
1154 | } | |
1155 | ||
1156 | static int proc_reapurb(struct dev_state *ps, void __user *arg) | |
1157 | { | |
1158 | struct async *as = reap_as(ps); | |
1159 | if (as) | |
1160 | return processcompl(as, (void __user * __user *)arg); | |
1161 | if (signal_pending(current)) | |
1162 | return -EINTR; | |
1163 | return -EIO; | |
1164 | } | |
1165 | ||
1166 | static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg) | |
1167 | { | |
1168 | struct async *as; | |
1169 | ||
1170 | if (!(as = async_getcompleted(ps))) | |
1171 | return -EAGAIN; | |
1172 | return processcompl(as, (void __user * __user *)arg); | |
1173 | } | |
1174 | ||
1175 | #ifdef CONFIG_COMPAT | |
1176 | ||
1177 | static int get_urb32(struct usbdevfs_urb *kurb, | |
1178 | struct usbdevfs_urb32 __user *uurb) | |
1179 | { | |
1180 | __u32 uptr; | |
1181 | if (get_user(kurb->type, &uurb->type) || | |
1182 | __get_user(kurb->endpoint, &uurb->endpoint) || | |
1183 | __get_user(kurb->status, &uurb->status) || | |
1184 | __get_user(kurb->flags, &uurb->flags) || | |
1185 | __get_user(kurb->buffer_length, &uurb->buffer_length) || | |
1186 | __get_user(kurb->actual_length, &uurb->actual_length) || | |
1187 | __get_user(kurb->start_frame, &uurb->start_frame) || | |
1188 | __get_user(kurb->number_of_packets, &uurb->number_of_packets) || | |
1189 | __get_user(kurb->error_count, &uurb->error_count) || | |
1190 | __get_user(kurb->signr, &uurb->signr)) | |
1191 | return -EFAULT; | |
1192 | ||
1193 | if (__get_user(uptr, &uurb->buffer)) | |
1194 | return -EFAULT; | |
1195 | kurb->buffer = compat_ptr(uptr); | |
1196 | if (__get_user(uptr, &uurb->buffer)) | |
1197 | return -EFAULT; | |
1198 | kurb->usercontext = compat_ptr(uptr); | |
1199 | ||
1200 | return 0; | |
1201 | } | |
1202 | ||
1203 | static int proc_submiturb_compat(struct dev_state *ps, void __user *arg) | |
1204 | { | |
1205 | struct usbdevfs_urb uurb; | |
1206 | ||
1207 | if (get_urb32(&uurb,(struct usbdevfs_urb32 *)arg)) | |
1208 | return -EFAULT; | |
1209 | ||
83626b01 | 1210 | return proc_do_submiturb(ps, &uurb, ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc, arg); |
1da177e4 LT |
1211 | } |
1212 | ||
1213 | static int processcompl_compat(struct async *as, void __user * __user *arg) | |
1214 | { | |
1215 | struct urb *urb = as->urb; | |
1216 | struct usbdevfs_urb32 __user *userurb = as->userurb; | |
1217 | void __user *addr = as->userurb; | |
1218 | unsigned int i; | |
1219 | ||
1220 | if (as->userbuffer) | |
1221 | if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length)) | |
1222 | return -EFAULT; | |
1223 | if (put_user(urb->status, &userurb->status)) | |
1224 | return -EFAULT; | |
1225 | if (put_user(urb->actual_length, &userurb->actual_length)) | |
1226 | return -EFAULT; | |
1227 | if (put_user(urb->error_count, &userurb->error_count)) | |
1228 | return -EFAULT; | |
1229 | ||
668a9541 CL |
1230 | if (usb_pipeisoc(urb->pipe)) { |
1231 | for (i = 0; i < urb->number_of_packets; i++) { | |
1232 | if (put_user(urb->iso_frame_desc[i].actual_length, | |
1233 | &userurb->iso_frame_desc[i].actual_length)) | |
1234 | return -EFAULT; | |
1235 | if (put_user(urb->iso_frame_desc[i].status, | |
1236 | &userurb->iso_frame_desc[i].status)) | |
1237 | return -EFAULT; | |
1238 | } | |
1da177e4 LT |
1239 | } |
1240 | ||
1241 | free_async(as); | |
1242 | if (put_user((u32)(u64)addr, (u32 __user *)arg)) | |
1243 | return -EFAULT; | |
1244 | return 0; | |
1245 | } | |
1246 | ||
1247 | static int proc_reapurb_compat(struct dev_state *ps, void __user *arg) | |
1248 | { | |
1249 | struct async *as = reap_as(ps); | |
1250 | if (as) | |
1251 | return processcompl_compat(as, (void __user * __user *)arg); | |
1252 | if (signal_pending(current)) | |
1253 | return -EINTR; | |
1254 | return -EIO; | |
1255 | } | |
1256 | ||
1257 | static int proc_reapurbnonblock_compat(struct dev_state *ps, void __user *arg) | |
1258 | { | |
1259 | struct async *as; | |
1260 | ||
1da177e4 LT |
1261 | if (!(as = async_getcompleted(ps))) |
1262 | return -EAGAIN; | |
1da177e4 LT |
1263 | return processcompl_compat(as, (void __user * __user *)arg); |
1264 | } | |
1265 | ||
1266 | #endif | |
1267 | ||
1268 | static int proc_disconnectsignal(struct dev_state *ps, void __user *arg) | |
1269 | { | |
1270 | struct usbdevfs_disconnectsignal ds; | |
1271 | ||
1272 | if (copy_from_user(&ds, arg, sizeof(ds))) | |
1273 | return -EFAULT; | |
1274 | if (ds.signr != 0 && (ds.signr < SIGRTMIN || ds.signr > SIGRTMAX)) | |
1275 | return -EINVAL; | |
1276 | ps->discsignr = ds.signr; | |
1277 | ps->disccontext = ds.context; | |
1278 | return 0; | |
1279 | } | |
1280 | ||
1281 | static int proc_claiminterface(struct dev_state *ps, void __user *arg) | |
1282 | { | |
1283 | unsigned int ifnum; | |
1284 | ||
1285 | if (get_user(ifnum, (unsigned int __user *)arg)) | |
1286 | return -EFAULT; | |
1287 | return claimintf(ps, ifnum); | |
1288 | } | |
1289 | ||
1290 | static int proc_releaseinterface(struct dev_state *ps, void __user *arg) | |
1291 | { | |
1292 | unsigned int ifnum; | |
1293 | int ret; | |
1294 | ||
1295 | if (get_user(ifnum, (unsigned int __user *)arg)) | |
1296 | return -EFAULT; | |
1297 | if ((ret = releaseintf(ps, ifnum)) < 0) | |
1298 | return ret; | |
1299 | destroy_async_on_interface (ps, ifnum); | |
1300 | return 0; | |
1301 | } | |
1302 | ||
c36fc889 | 1303 | static int proc_ioctl(struct dev_state *ps, struct usbdevfs_ioctl *ctl) |
1da177e4 | 1304 | { |
1da177e4 LT |
1305 | int size; |
1306 | void *buf = NULL; | |
1307 | int retval = 0; | |
1308 | struct usb_interface *intf = NULL; | |
1309 | struct usb_driver *driver = NULL; | |
1da177e4 | 1310 | |
c36fc889 PZ |
1311 | /* alloc buffer */ |
1312 | if ((size = _IOC_SIZE (ctl->ioctl_code)) > 0) { | |
1da177e4 LT |
1313 | if ((buf = kmalloc (size, GFP_KERNEL)) == NULL) |
1314 | return -ENOMEM; | |
c36fc889 PZ |
1315 | if ((_IOC_DIR(ctl->ioctl_code) & _IOC_WRITE)) { |
1316 | if (copy_from_user (buf, ctl->data, size)) { | |
6fd19f4b | 1317 | kfree(buf); |
1da177e4 LT |
1318 | return -EFAULT; |
1319 | } | |
1320 | } else { | |
1321 | memset (buf, 0, size); | |
1322 | } | |
1323 | } | |
1324 | ||
1325 | if (!connected(ps->dev)) { | |
6fd19f4b | 1326 | kfree(buf); |
1da177e4 LT |
1327 | return -ENODEV; |
1328 | } | |
1329 | ||
1330 | if (ps->dev->state != USB_STATE_CONFIGURED) | |
1331 | retval = -EHOSTUNREACH; | |
c36fc889 | 1332 | else if (!(intf = usb_ifnum_to_if (ps->dev, ctl->ifno))) |
1da177e4 | 1333 | retval = -EINVAL; |
c36fc889 | 1334 | else switch (ctl->ioctl_code) { |
1da177e4 LT |
1335 | |
1336 | /* disconnect kernel driver from interface */ | |
1337 | case USBDEVFS_DISCONNECT: | |
1338 | ||
1da177e4 LT |
1339 | down_write(&usb_bus_type.subsys.rwsem); |
1340 | if (intf->dev.driver) { | |
1341 | driver = to_usb_driver(intf->dev.driver); | |
1342 | dev_dbg (&intf->dev, "disconnect by usbfs\n"); | |
1343 | usb_driver_release_interface(driver, intf); | |
1344 | } else | |
1345 | retval = -ENODATA; | |
1346 | up_write(&usb_bus_type.subsys.rwsem); | |
1347 | break; | |
1348 | ||
1349 | /* let kernel drivers try to (re)bind to the interface */ | |
1350 | case USBDEVFS_CONNECT: | |
1351 | usb_unlock_device(ps->dev); | |
1da177e4 | 1352 | bus_rescan_devices(intf->dev.bus); |
1da177e4 LT |
1353 | usb_lock_device(ps->dev); |
1354 | break; | |
1355 | ||
1356 | /* talk directly to the interface's driver */ | |
1357 | default: | |
1358 | down_read(&usb_bus_type.subsys.rwsem); | |
1359 | if (intf->dev.driver) | |
1360 | driver = to_usb_driver(intf->dev.driver); | |
1361 | if (driver == NULL || driver->ioctl == NULL) { | |
1362 | retval = -ENOTTY; | |
1363 | } else { | |
c36fc889 | 1364 | retval = driver->ioctl (intf, ctl->ioctl_code, buf); |
1da177e4 LT |
1365 | if (retval == -ENOIOCTLCMD) |
1366 | retval = -ENOTTY; | |
1367 | } | |
1368 | up_read(&usb_bus_type.subsys.rwsem); | |
1369 | } | |
1370 | ||
1371 | /* cleanup and return */ | |
1372 | if (retval >= 0 | |
c36fc889 | 1373 | && (_IOC_DIR (ctl->ioctl_code) & _IOC_READ) != 0 |
1da177e4 | 1374 | && size > 0 |
c36fc889 | 1375 | && copy_to_user (ctl->data, buf, size) != 0) |
1da177e4 | 1376 | retval = -EFAULT; |
6fd19f4b JJ |
1377 | |
1378 | kfree(buf); | |
1da177e4 LT |
1379 | return retval; |
1380 | } | |
1381 | ||
c36fc889 PZ |
1382 | static int proc_ioctl_default(struct dev_state *ps, void __user *arg) |
1383 | { | |
1384 | struct usbdevfs_ioctl ctrl; | |
1385 | ||
1386 | if (copy_from_user(&ctrl, arg, sizeof (ctrl))) | |
1387 | return -EFAULT; | |
1388 | return proc_ioctl(ps, &ctrl); | |
1389 | } | |
1390 | ||
1391 | #ifdef CONFIG_COMPAT | |
777da590 | 1392 | static int proc_ioctl_compat(struct dev_state *ps, compat_uptr_t arg) |
c36fc889 PZ |
1393 | { |
1394 | struct usbdevfs_ioctl32 __user *uioc; | |
1395 | struct usbdevfs_ioctl ctrl; | |
1396 | u32 udata; | |
1397 | ||
058120d7 | 1398 | uioc = compat_ptr((long)arg); |
c36fc889 PZ |
1399 | if (get_user(ctrl.ifno, &uioc->ifno) || |
1400 | get_user(ctrl.ioctl_code, &uioc->ioctl_code) || | |
1401 | __get_user(udata, &uioc->data)) | |
1402 | return -EFAULT; | |
1403 | ctrl.data = compat_ptr(udata); | |
1404 | ||
1405 | return proc_ioctl(ps, &ctrl); | |
1406 | } | |
1407 | #endif | |
1408 | ||
1da177e4 LT |
1409 | /* |
1410 | * NOTE: All requests here that have interface numbers as parameters | |
1411 | * are assuming that somehow the configuration has been prevented from | |
1412 | * changing. But there's no mechanism to ensure that... | |
1413 | */ | |
1414 | static int usbdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) | |
1415 | { | |
1416 | struct dev_state *ps = (struct dev_state *)file->private_data; | |
1417 | struct usb_device *dev = ps->dev; | |
1418 | void __user *p = (void __user *)arg; | |
1419 | int ret = -ENOTTY; | |
1420 | ||
1421 | if (!(file->f_mode & FMODE_WRITE)) | |
1422 | return -EPERM; | |
1423 | usb_lock_device(dev); | |
1424 | if (!connected(dev)) { | |
1425 | usb_unlock_device(dev); | |
1426 | return -ENODEV; | |
1427 | } | |
1428 | ||
1429 | switch (cmd) { | |
1430 | case USBDEVFS_CONTROL: | |
1431 | snoop(&dev->dev, "%s: CONTROL\n", __FUNCTION__); | |
1432 | ret = proc_control(ps, p); | |
1433 | if (ret >= 0) | |
1434 | inode->i_mtime = CURRENT_TIME; | |
1435 | break; | |
1436 | ||
1437 | case USBDEVFS_BULK: | |
1438 | snoop(&dev->dev, "%s: BULK\n", __FUNCTION__); | |
1439 | ret = proc_bulk(ps, p); | |
1440 | if (ret >= 0) | |
1441 | inode->i_mtime = CURRENT_TIME; | |
1442 | break; | |
1443 | ||
1444 | case USBDEVFS_RESETEP: | |
1445 | snoop(&dev->dev, "%s: RESETEP\n", __FUNCTION__); | |
1446 | ret = proc_resetep(ps, p); | |
1447 | if (ret >= 0) | |
1448 | inode->i_mtime = CURRENT_TIME; | |
1449 | break; | |
1450 | ||
1451 | case USBDEVFS_RESET: | |
1452 | snoop(&dev->dev, "%s: RESET\n", __FUNCTION__); | |
1453 | ret = proc_resetdevice(ps); | |
1454 | break; | |
1455 | ||
1456 | case USBDEVFS_CLEAR_HALT: | |
1457 | snoop(&dev->dev, "%s: CLEAR_HALT\n", __FUNCTION__); | |
1458 | ret = proc_clearhalt(ps, p); | |
1459 | if (ret >= 0) | |
1460 | inode->i_mtime = CURRENT_TIME; | |
1461 | break; | |
1462 | ||
1463 | case USBDEVFS_GETDRIVER: | |
1464 | snoop(&dev->dev, "%s: GETDRIVER\n", __FUNCTION__); | |
1465 | ret = proc_getdriver(ps, p); | |
1466 | break; | |
1467 | ||
1468 | case USBDEVFS_CONNECTINFO: | |
1469 | snoop(&dev->dev, "%s: CONNECTINFO\n", __FUNCTION__); | |
1470 | ret = proc_connectinfo(ps, p); | |
1471 | break; | |
1472 | ||
1473 | case USBDEVFS_SETINTERFACE: | |
1474 | snoop(&dev->dev, "%s: SETINTERFACE\n", __FUNCTION__); | |
1475 | ret = proc_setintf(ps, p); | |
1476 | break; | |
1477 | ||
1478 | case USBDEVFS_SETCONFIGURATION: | |
1479 | snoop(&dev->dev, "%s: SETCONFIGURATION\n", __FUNCTION__); | |
1480 | ret = proc_setconfig(ps, p); | |
1481 | break; | |
1482 | ||
1483 | case USBDEVFS_SUBMITURB: | |
1484 | snoop(&dev->dev, "%s: SUBMITURB\n", __FUNCTION__); | |
1485 | ret = proc_submiturb(ps, p); | |
1486 | if (ret >= 0) | |
1487 | inode->i_mtime = CURRENT_TIME; | |
1488 | break; | |
1489 | ||
1490 | #ifdef CONFIG_COMPAT | |
1491 | ||
1492 | case USBDEVFS_SUBMITURB32: | |
1493 | snoop(&dev->dev, "%s: SUBMITURB32\n", __FUNCTION__); | |
1494 | ret = proc_submiturb_compat(ps, p); | |
1495 | if (ret >= 0) | |
1496 | inode->i_mtime = CURRENT_TIME; | |
1497 | break; | |
1498 | ||
1499 | case USBDEVFS_REAPURB32: | |
1500 | snoop(&dev->dev, "%s: REAPURB32\n", __FUNCTION__); | |
1501 | ret = proc_reapurb_compat(ps, p); | |
1502 | break; | |
1503 | ||
1504 | case USBDEVFS_REAPURBNDELAY32: | |
1505 | snoop(&dev->dev, "%s: REAPURBDELAY32\n", __FUNCTION__); | |
1506 | ret = proc_reapurbnonblock_compat(ps, p); | |
1507 | break; | |
1508 | ||
c36fc889 PZ |
1509 | case USBDEVFS_IOCTL32: |
1510 | snoop(&dev->dev, "%s: IOCTL\n", __FUNCTION__); | |
777da590 | 1511 | ret = proc_ioctl_compat(ps, (compat_uptr_t)(long)p); |
c36fc889 | 1512 | break; |
1da177e4 LT |
1513 | #endif |
1514 | ||
1515 | case USBDEVFS_DISCARDURB: | |
1516 | snoop(&dev->dev, "%s: DISCARDURB\n", __FUNCTION__); | |
1517 | ret = proc_unlinkurb(ps, p); | |
1518 | break; | |
1519 | ||
1520 | case USBDEVFS_REAPURB: | |
1521 | snoop(&dev->dev, "%s: REAPURB\n", __FUNCTION__); | |
1522 | ret = proc_reapurb(ps, p); | |
1523 | break; | |
1524 | ||
1525 | case USBDEVFS_REAPURBNDELAY: | |
1526 | snoop(&dev->dev, "%s: REAPURBDELAY\n", __FUNCTION__); | |
1527 | ret = proc_reapurbnonblock(ps, p); | |
1528 | break; | |
1529 | ||
1530 | case USBDEVFS_DISCSIGNAL: | |
1531 | snoop(&dev->dev, "%s: DISCSIGNAL\n", __FUNCTION__); | |
1532 | ret = proc_disconnectsignal(ps, p); | |
1533 | break; | |
1534 | ||
1535 | case USBDEVFS_CLAIMINTERFACE: | |
1536 | snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __FUNCTION__); | |
1537 | ret = proc_claiminterface(ps, p); | |
1538 | break; | |
1539 | ||
1540 | case USBDEVFS_RELEASEINTERFACE: | |
1541 | snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __FUNCTION__); | |
1542 | ret = proc_releaseinterface(ps, p); | |
1543 | break; | |
1544 | ||
1545 | case USBDEVFS_IOCTL: | |
1546 | snoop(&dev->dev, "%s: IOCTL\n", __FUNCTION__); | |
c36fc889 | 1547 | ret = proc_ioctl_default(ps, p); |
1da177e4 LT |
1548 | break; |
1549 | } | |
1550 | usb_unlock_device(dev); | |
1551 | if (ret >= 0) | |
1552 | inode->i_atime = CURRENT_TIME; | |
1553 | return ret; | |
1554 | } | |
1555 | ||
1556 | /* No kernel lock - fine */ | |
1557 | static unsigned int usbdev_poll(struct file *file, struct poll_table_struct *wait) | |
1558 | { | |
1559 | struct dev_state *ps = (struct dev_state *)file->private_data; | |
1560 | unsigned int mask = 0; | |
1561 | ||
1562 | poll_wait(file, &ps->wait, wait); | |
1563 | if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed)) | |
1564 | mask |= POLLOUT | POLLWRNORM; | |
1565 | if (!connected(ps->dev)) | |
1566 | mask |= POLLERR | POLLHUP; | |
1567 | return mask; | |
1568 | } | |
1569 | ||
1570 | struct file_operations usbfs_device_file_operations = { | |
1571 | .llseek = usbdev_lseek, | |
1572 | .read = usbdev_read, | |
1573 | .poll = usbdev_poll, | |
1574 | .ioctl = usbdev_ioctl, | |
1575 | .open = usbdev_open, | |
1576 | .release = usbdev_release, | |
1577 | }; | |
fbf82fd2 | 1578 | |
a7b986b3 | 1579 | static void usbdev_add(struct usb_device *dev) |
fbf82fd2 KS |
1580 | { |
1581 | int minor = ((dev->bus->busnum-1) * 128) + (dev->devnum-1); | |
1582 | ||
cae74b30 GKH |
1583 | dev->class_dev = class_device_create(usb_device_class, NULL, |
1584 | MKDEV(USB_DEVICE_MAJOR, minor), &dev->dev, | |
fbf82fd2 KS |
1585 | "usbdev%d.%d", dev->bus->busnum, dev->devnum); |
1586 | ||
cae74b30 | 1587 | dev->class_dev->class_data = dev; |
fbf82fd2 KS |
1588 | } |
1589 | ||
a7b986b3 | 1590 | static void usbdev_remove(struct usb_device *dev) |
fbf82fd2 | 1591 | { |
cae74b30 | 1592 | class_device_unregister(dev->class_dev); |
fbf82fd2 KS |
1593 | } |
1594 | ||
a7b986b3 GKH |
1595 | static int usbdev_notify(struct notifier_block *self, unsigned long action, |
1596 | void *dev) | |
1597 | { | |
1598 | switch (action) { | |
1599 | case USB_DEVICE_ADD: | |
1600 | usbdev_add(dev); | |
1601 | break; | |
1602 | case USB_DEVICE_REMOVE: | |
1603 | usbdev_remove(dev); | |
1604 | break; | |
1605 | } | |
1606 | return NOTIFY_OK; | |
1607 | } | |
1608 | ||
1609 | static struct notifier_block usbdev_nb = { | |
1610 | .notifier_call = usbdev_notify, | |
1611 | }; | |
1612 | ||
fbf82fd2 KS |
1613 | static struct cdev usb_device_cdev = { |
1614 | .kobj = {.name = "usb_device", }, | |
1615 | .owner = THIS_MODULE, | |
1616 | }; | |
1617 | ||
1618 | int __init usbdev_init(void) | |
1619 | { | |
1620 | int retval; | |
1621 | ||
fad21bdf AS |
1622 | retval = register_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX, |
1623 | "usb_device"); | |
fbf82fd2 KS |
1624 | if (retval) { |
1625 | err("unable to register minors for usb_device"); | |
1626 | goto out; | |
1627 | } | |
1628 | cdev_init(&usb_device_cdev, &usbfs_device_file_operations); | |
fad21bdf | 1629 | retval = cdev_add(&usb_device_cdev, USB_DEVICE_DEV, USB_DEVICE_MAX); |
fbf82fd2 KS |
1630 | if (retval) { |
1631 | err("unable to get usb_device major %d", USB_DEVICE_MAJOR); | |
a7b986b3 | 1632 | goto error_cdev; |
fbf82fd2 KS |
1633 | } |
1634 | usb_device_class = class_create(THIS_MODULE, "usb_device"); | |
1635 | if (IS_ERR(usb_device_class)) { | |
1636 | err("unable to register usb_device class"); | |
1637 | retval = PTR_ERR(usb_device_class); | |
a7b986b3 | 1638 | goto error_class; |
fbf82fd2 KS |
1639 | } |
1640 | ||
a7b986b3 GKH |
1641 | usb_register_notify(&usbdev_nb); |
1642 | ||
fbf82fd2 KS |
1643 | out: |
1644 | return retval; | |
a7b986b3 GKH |
1645 | |
1646 | error_class: | |
1647 | usb_device_class = NULL; | |
1648 | cdev_del(&usb_device_cdev); | |
1649 | ||
1650 | error_cdev: | |
1651 | unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX); | |
1652 | goto out; | |
fbf82fd2 KS |
1653 | } |
1654 | ||
1655 | void usbdev_cleanup(void) | |
1656 | { | |
a7b986b3 | 1657 | usb_unregister_notify(&usbdev_nb); |
fbf82fd2 KS |
1658 | class_destroy(usb_device_class); |
1659 | cdev_del(&usb_device_cdev); | |
fad21bdf | 1660 | unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX); |
fbf82fd2 KS |
1661 | } |
1662 |