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USB: unconfigure devices which have config 0
[linux-2.6.22.y-op.git] / drivers / usb / core / devio.c
blob274f14f1633e8f348baff7c4ff8f138b3b2a803c
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
33 * 30.09.2005 0.3 Fix user-triggerable oops in async URB delivery
34 * (CAN-2005-3055)
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>
48 #include <linux/cdev.h>
49 #include <linux/notifier.h>
50 #include <linux/security.h>
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
58 #define USB_MAXBUS 64
59 #define USB_DEVICE_MAX USB_MAXBUS * 128
60 static struct class *usb_device_class;
61
62 /* Mutual exclusion for removal, open, and release */
63 DEFINE_MUTEX(usbfs_mutex);
64
65 struct async {
66 struct list_head asynclist;
67 struct dev_state *ps;
68 struct pid *pid;
69 uid_t uid, euid;
70 unsigned int signr;
71 unsigned int ifnum;
72 void __user *userbuffer;
73 void __user *userurb;
74 struct urb *urb;
75 u32 secid;
76 };
77
78 static int usbfs_snoop = 0;
79 module_param (usbfs_snoop, bool, S_IRUGO | S_IWUSR);
80 MODULE_PARM_DESC (usbfs_snoop, "true to log all usbfs traffic");
81
82 #define snoop(dev, format, arg...) \
83 do { \
84 if (usbfs_snoop) \
85 dev_info( dev , format , ## arg); \
86 } while (0)
87
88 #define USB_DEVICE_DEV MKDEV(USB_DEVICE_MAJOR, 0)
89
90
91 #define MAX_USBFS_BUFFER_SIZE 16384
92
93 static inline int connected (struct dev_state *ps)
94 {
95 return (!list_empty(&ps->list) &&
96 ps->dev->state != USB_STATE_NOTATTACHED);
97 }
98
99 static loff_t usbdev_lseek(struct file *file, loff_t offset, int orig)
100 {
101 loff_t ret;
102
103 lock_kernel();
104
105 switch (orig) {
106 case 0:
107 file->f_pos = offset;
108 ret = file->f_pos;
109 break;
110 case 1:
111 file->f_pos += offset;
112 ret = file->f_pos;
113 break;
114 case 2:
115 default:
116 ret = -EINVAL;
117 }
118
119 unlock_kernel();
120 return ret;
121 }
122
123 static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos)
124 {
125 struct dev_state *ps = file->private_data;
126 struct usb_device *dev = ps->dev;
127 ssize_t ret = 0;
128 unsigned len;
129 loff_t pos;
130 int i;
131
132 pos = *ppos;
133 usb_lock_device(dev);
134 if (!connected(ps)) {
135 ret = -ENODEV;
136 goto err;
137 } else if (pos < 0) {
138 ret = -EINVAL;
139 goto err;
140 }
141
142 if (pos < sizeof(struct usb_device_descriptor)) {
143 struct usb_device_descriptor temp_desc ; /* 18 bytes - fits on the stack */
144
145 memcpy(&temp_desc, &dev->descriptor, sizeof(dev->descriptor));
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);
150
151 len = sizeof(struct usb_device_descriptor) - pos;
152 if (len > nbytes)
153 len = nbytes;
154 if (copy_to_user(buf, ((char *)&temp_desc) + pos, len)) {
155 ret = -EFAULT;
156 goto err;
157 }
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 {
213 unsigned int assize = sizeof(struct async) + numisoframes * sizeof(struct usb_iso_packet_descriptor);
214 struct async *as = kzalloc(assize, GFP_KERNEL);
215
216 if (!as)
217 return NULL;
218 as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL);
219 if (!as->urb) {
220 kfree(as);
221 return NULL;
222 }
223 return as;
224 }
225
226 static void free_async(struct async *as)
227 {
228 put_pid(as->pid);
229 kfree(as->urb->transfer_buffer);
230 kfree(as->urb->setup_packet);
231 usb_free_urb(as->urb);
232 kfree(as);
233 }
234
235 static inline void async_newpending(struct async *as)
236 {
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);
243 }
244
245 static inline void async_removepending(struct async *as)
246 {
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);
253 }
254
255 static inline struct async *async_getcompleted(struct dev_state *ps)
256 {
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, asynclist);
263 list_del_init(&as->asynclist);
264 }
265 spin_unlock_irqrestore(&ps->lock, flags);
266 return as;
267 }
268
269 static inline struct async *async_getpending(struct dev_state *ps, void __user *userurb)
270 {
271 unsigned long flags;
272 struct async *as;
273
274 spin_lock_irqsave(&ps->lock, flags);
275 list_for_each_entry(as, &ps->async_pending, asynclist)
276 if (as->userurb == userurb) {
277 list_del_init(&as->asynclist);
278 spin_unlock_irqrestore(&ps->lock, flags);
279 return as;
280 }
281 spin_unlock_irqrestore(&ps->lock, flags);
282 return NULL;
283 }
284
285 static void snoop_urb(struct urb *urb, void __user *userurb)
286 {
287 int j;
288 unsigned char *data = urb->transfer_buffer;
289
290 if (!usbfs_snoop)
291 return;
292
293 if (urb->pipe & USB_DIR_IN)
294 dev_info(&urb->dev->dev, "direction=IN\n");
295 else
296 dev_info(&urb->dev->dev, "direction=OUT\n");
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)
303 printk ("%02x ", data[j]);
304 printk("\n");
305 }
306
307 static void async_completed(struct urb *urb)
308 {
309 struct async *as = urb->context;
310 struct dev_state *ps = as->ps;
311 struct siginfo sinfo;
312
313 spin_lock(&ps->lock);
314 list_move_tail(&as->asynclist, &ps->async_completed);
315 spin_unlock(&ps->lock);
316 if (as->signr) {
317 sinfo.si_signo = as->signr;
318 sinfo.si_errno = as->urb->status;
319 sinfo.si_code = SI_ASYNCIO;
320 sinfo.si_addr = as->userurb;
321 kill_pid_info_as_uid(as->signr, &sinfo, as->pid, as->uid,
322 as->euid, as->secid);
323 }
324 snoop(&urb->dev->dev, "urb complete\n");
325 snoop_urb(urb, as->userurb);
326 wake_up(&ps->wait);
327 }
328
329 static void destroy_async (struct dev_state *ps, struct list_head *list)
330 {
331 struct async *as;
332 unsigned long flags;
333
334 spin_lock_irqsave(&ps->lock, flags);
335 while (!list_empty(list)) {
336 as = list_entry(list->next, struct async, asynclist);
337 list_del_init(&as->asynclist);
338
339 /* drop the spinlock so the completion handler can run */
340 spin_unlock_irqrestore(&ps->lock, flags);
341 usb_kill_urb(as->urb);
342 spin_lock_irqsave(&ps->lock, flags);
343 }
344 spin_unlock_irqrestore(&ps->lock, flags);
345 as = async_getcompleted(ps);
346 while (as) {
347 free_async(as);
348 as = async_getcompleted(ps);
349 }
350 }
351
352 static void destroy_async_on_interface (struct dev_state *ps, unsigned int ifnum)
353 {
354 struct list_head *p, *q, hitlist;
355 unsigned long flags;
356
357 INIT_LIST_HEAD(&hitlist);
358 spin_lock_irqsave(&ps->lock, flags);
359 list_for_each_safe(p, q, &ps->async_pending)
360 if (ifnum == list_entry(p, struct async, asynclist)->ifnum)
361 list_move_tail(p, &hitlist);
362 spin_unlock_irqrestore(&ps->lock, flags);
363 destroy_async(ps, &hitlist);
364 }
365
366 static inline void destroy_all_async(struct dev_state *ps)
367 {
368 destroy_async(ps, &ps->async_pending);
369 }
370
371 /*
372 * interface claims are made only at the request of user level code,
373 * which can also release them (explicitly or by closing files).
374 * they're also undone when devices disconnect.
375 */
376
377 static int driver_probe (struct usb_interface *intf,
378 const struct usb_device_id *id)
379 {
380 return -ENODEV;
381 }
382
383 static void driver_disconnect(struct usb_interface *intf)
384 {
385 struct dev_state *ps = usb_get_intfdata (intf);
386 unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber;
387
388 if (!ps)
389 return;
390
391 /* NOTE: this relies on usbcore having canceled and completed
392 * all pending I/O requests; 2.6 does that.
393 */
394
395 if (likely(ifnum < 8*sizeof(ps->ifclaimed)))
396 clear_bit(ifnum, &ps->ifclaimed);
397 else
398 warn("interface number %u out of range", ifnum);
399
400 usb_set_intfdata (intf, NULL);
401
402 /* force async requests to complete */
403 destroy_async_on_interface(ps, ifnum);
404 }
405
406 struct usb_driver usbfs_driver = {
407 .name = "usbfs",
408 .probe = driver_probe,
409 .disconnect = driver_disconnect,
410 };
411
412 static int claimintf(struct dev_state *ps, unsigned int ifnum)
413 {
414 struct usb_device *dev = ps->dev;
415 struct usb_interface *intf;
416 int err;
417
418 if (ifnum >= 8*sizeof(ps->ifclaimed))
419 return -EINVAL;
420 /* already claimed */
421 if (test_bit(ifnum, &ps->ifclaimed))
422 return 0;
423
424 /* lock against other changes to driver bindings */
425 down_write(&usb_bus_type.subsys.rwsem);
426 intf = usb_ifnum_to_if(dev, ifnum);
427 if (!intf)
428 err = -ENOENT;
429 else
430 err = usb_driver_claim_interface(&usbfs_driver, intf, ps);
431 up_write(&usb_bus_type.subsys.rwsem);
432 if (err == 0)
433 set_bit(ifnum, &ps->ifclaimed);
434 return err;
435 }
436
437 static int releaseintf(struct dev_state *ps, unsigned int ifnum)
438 {
439 struct usb_device *dev;
440 struct usb_interface *intf;
441 int err;
442
443 err = -EINVAL;
444 if (ifnum >= 8*sizeof(ps->ifclaimed))
445 return err;
446 dev = ps->dev;
447 /* lock against other changes to driver bindings */
448 down_write(&usb_bus_type.subsys.rwsem);
449 intf = usb_ifnum_to_if(dev, ifnum);
450 if (!intf)
451 err = -ENOENT;
452 else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) {
453 usb_driver_release_interface(&usbfs_driver, intf);
454 err = 0;
455 }
456 up_write(&usb_bus_type.subsys.rwsem);
457 return err;
458 }
459
460 static int checkintf(struct dev_state *ps, unsigned int ifnum)
461 {
462 if (ps->dev->state != USB_STATE_CONFIGURED)
463 return -EHOSTUNREACH;
464 if (ifnum >= 8*sizeof(ps->ifclaimed))
465 return -EINVAL;
466 if (test_bit(ifnum, &ps->ifclaimed))
467 return 0;
468 /* if not yet claimed, claim it for the driver */
469 dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim interface %u before use\n",
470 current->pid, current->comm, ifnum);
471 return claimintf(ps, ifnum);
472 }
473
474 static int findintfep(struct usb_device *dev, unsigned int ep)
475 {
476 unsigned int i, j, e;
477 struct usb_interface *intf;
478 struct usb_host_interface *alts;
479 struct usb_endpoint_descriptor *endpt;
480
481 if (ep & ~(USB_DIR_IN|0xf))
482 return -EINVAL;
483 if (!dev->actconfig)
484 return -ESRCH;
485 for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) {
486 intf = dev->actconfig->interface[i];
487 for (j = 0; j < intf->num_altsetting; j++) {
488 alts = &intf->altsetting[j];
489 for (e = 0; e < alts->desc.bNumEndpoints; e++) {
490 endpt = &alts->endpoint[e].desc;
491 if (endpt->bEndpointAddress == ep)
492 return alts->desc.bInterfaceNumber;
493 }
494 }
495 }
496 return -ENOENT;
497 }
498
499 static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype, unsigned int index)
500 {
501 int ret = 0;
502
503 if (ps->dev->state != USB_STATE_ADDRESS
504 && ps->dev->state != USB_STATE_CONFIGURED)
505 return -EHOSTUNREACH;
506 if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype))
507 return 0;
508
509 index &= 0xff;
510 switch (requesttype & USB_RECIP_MASK) {
511 case USB_RECIP_ENDPOINT:
512 if ((ret = findintfep(ps->dev, index)) >= 0)
513 ret = checkintf(ps, ret);
514 break;
515
516 case USB_RECIP_INTERFACE:
517 ret = checkintf(ps, index);
518 break;
519 }
520 return ret;
521 }
522
523 static struct usb_device *usbdev_lookup_minor(int minor)
524 {
525 struct device *device;
526 struct usb_device *udev = NULL;
527
528 down(&usb_device_class->sem);
529 list_for_each_entry(device, &usb_device_class->devices, node) {
530 if (device->devt == MKDEV(USB_DEVICE_MAJOR, minor)) {
531 udev = device->platform_data;
532 break;
533 }
534 }
535 up(&usb_device_class->sem);
536
537 return udev;
538 };
539
540 /*
541 * file operations
542 */
543 static int usbdev_open(struct inode *inode, struct file *file)
544 {
545 struct usb_device *dev = NULL;
546 struct dev_state *ps;
547 int ret;
548
549 /* Protect against simultaneous removal or release */
550 mutex_lock(&usbfs_mutex);
551
552 ret = -ENOMEM;
553 if (!(ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL)))
554 goto out;
555
556 ret = -ENOENT;
557 /* check if we are called from a real node or usbfs */
558 if (imajor(inode) == USB_DEVICE_MAJOR)
559 dev = usbdev_lookup_minor(iminor(inode));
560 if (!dev)
561 dev = inode->i_private;
562 if (!dev)
563 goto out;
564 ret = usb_autoresume_device(dev);
565 if (ret)
566 goto out;
567
568 usb_get_dev(dev);
569 ret = 0;
570 ps->dev = dev;
571 ps->file = file;
572 spin_lock_init(&ps->lock);
573 INIT_LIST_HEAD(&ps->list);
574 INIT_LIST_HEAD(&ps->async_pending);
575 INIT_LIST_HEAD(&ps->async_completed);
576 init_waitqueue_head(&ps->wait);
577 ps->discsignr = 0;
578 ps->disc_pid = get_pid(task_pid(current));
579 ps->disc_uid = current->uid;
580 ps->disc_euid = current->euid;
581 ps->disccontext = NULL;
582 ps->ifclaimed = 0;
583 security_task_getsecid(current, &ps->secid);
584 wmb();
585 list_add_tail(&ps->list, &dev->filelist);
586 file->private_data = ps;
587 out:
588 if (ret)
589 kfree(ps);
590 mutex_unlock(&usbfs_mutex);
591 return ret;
592 }
593
594 static int usbdev_release(struct inode *inode, struct file *file)
595 {
596 struct dev_state *ps = file->private_data;
597 struct usb_device *dev = ps->dev;
598 unsigned int ifnum;
599
600 usb_lock_device(dev);
601
602 /* Protect against simultaneous open */
603 mutex_lock(&usbfs_mutex);
604 list_del_init(&ps->list);
605 mutex_unlock(&usbfs_mutex);
606
607 for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed);
608 ifnum++) {
609 if (test_bit(ifnum, &ps->ifclaimed))
610 releaseintf(ps, ifnum);
611 }
612 destroy_all_async(ps);
613 usb_autosuspend_device(dev);
614 usb_unlock_device(dev);
615 usb_put_dev(dev);
616 put_pid(ps->disc_pid);
617 kfree(ps);
618 return 0;
619 }
620
621 static int proc_control(struct dev_state *ps, void __user *arg)
622 {
623 struct usb_device *dev = ps->dev;
624 struct usbdevfs_ctrltransfer ctrl;
625 unsigned int tmo;
626 unsigned char *tbuf;
627 int i, j, ret;
628
629 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
630 return -EFAULT;
631 if ((ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.wIndex)))
632 return ret;
633 if (ctrl.wLength > PAGE_SIZE)
634 return -EINVAL;
635 if (!(tbuf = (unsigned char *)__get_free_page(GFP_KERNEL)))
636 return -ENOMEM;
637 tmo = ctrl.timeout;
638 if (ctrl.bRequestType & 0x80) {
639 if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data, ctrl.wLength)) {
640 free_page((unsigned long)tbuf);
641 return -EINVAL;
642 }
643 snoop(&dev->dev, "control read: bRequest=%02x "
644 "bRrequestType=%02x wValue=%04x "
645 "wIndex=%04x wLength=%04x\n",
646 ctrl.bRequest, ctrl.bRequestType, ctrl.wValue,
647 ctrl.wIndex, ctrl.wLength);
648
649 usb_unlock_device(dev);
650 i = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType,
651 ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo);
652 usb_lock_device(dev);
653 if ((i > 0) && ctrl.wLength) {
654 if (usbfs_snoop) {
655 dev_info(&dev->dev, "control read: data ");
656 for (j = 0; j < i; ++j)
657 printk("%02x ", (unsigned char)(tbuf)[j]);
658 printk("\n");
659 }
660 if (copy_to_user(ctrl.data, tbuf, i)) {
661 free_page((unsigned long)tbuf);
662 return -EFAULT;
663 }
664 }
665 } else {
666 if (ctrl.wLength) {
667 if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) {
668 free_page((unsigned long)tbuf);
669 return -EFAULT;
670 }
671 }
672 snoop(&dev->dev, "control write: bRequest=%02x "
673 "bRrequestType=%02x wValue=%04x "
674 "wIndex=%04x wLength=%04x\n",
675 ctrl.bRequest, ctrl.bRequestType, ctrl.wValue,
676 ctrl.wIndex, ctrl.wLength);
677 if (usbfs_snoop) {
678 dev_info(&dev->dev, "control write: data: ");
679 for (j = 0; j < ctrl.wLength; ++j)
680 printk("%02x ", (unsigned char)(tbuf)[j]);
681 printk("\n");
682 }
683 usb_unlock_device(dev);
684 i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType,
685 ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo);
686 usb_lock_device(dev);
687 }
688 free_page((unsigned long)tbuf);
689 if (i<0 && i != -EPIPE) {
690 dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL "
691 "failed cmd %s rqt %u rq %u len %u ret %d\n",
692 current->comm, ctrl.bRequestType, ctrl.bRequest,
693 ctrl.wLength, i);
694 }
695 return i;
696 }
697
698 static int proc_bulk(struct dev_state *ps, void __user *arg)
699 {
700 struct usb_device *dev = ps->dev;
701 struct usbdevfs_bulktransfer bulk;
702 unsigned int tmo, len1, pipe;
703 int len2;
704 unsigned char *tbuf;
705 int i, j, ret;
706
707 if (copy_from_user(&bulk, arg, sizeof(bulk)))
708 return -EFAULT;
709 if ((ret = findintfep(ps->dev, bulk.ep)) < 0)
710 return ret;
711 if ((ret = checkintf(ps, ret)))
712 return ret;
713 if (bulk.ep & USB_DIR_IN)
714 pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f);
715 else
716 pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f);
717 if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN)))
718 return -EINVAL;
719 len1 = bulk.len;
720 if (len1 > MAX_USBFS_BUFFER_SIZE)
721 return -EINVAL;
722 if (!(tbuf = kmalloc(len1, GFP_KERNEL)))
723 return -ENOMEM;
724 tmo = bulk.timeout;
725 if (bulk.ep & 0x80) {
726 if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) {
727 kfree(tbuf);
728 return -EINVAL;
729 }
730 snoop(&dev->dev, "bulk read: len=0x%02x timeout=%04d\n",
731 bulk.len, bulk.timeout);
732 usb_unlock_device(dev);
733 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
734 usb_lock_device(dev);
735 if (!i && len2) {
736 if (usbfs_snoop) {
737 dev_info(&dev->dev, "bulk read: data ");
738 for (j = 0; j < len2; ++j)
739 printk("%02x ", (unsigned char)(tbuf)[j]);
740 printk("\n");
741 }
742 if (copy_to_user(bulk.data, tbuf, len2)) {
743 kfree(tbuf);
744 return -EFAULT;
745 }
746 }
747 } else {
748 if (len1) {
749 if (copy_from_user(tbuf, bulk.data, len1)) {
750 kfree(tbuf);
751 return -EFAULT;
752 }
753 }
754 snoop(&dev->dev, "bulk write: len=0x%02x timeout=%04d\n",
755 bulk.len, bulk.timeout);
756 if (usbfs_snoop) {
757 dev_info(&dev->dev, "bulk write: data: ");
758 for (j = 0; j < len1; ++j)
759 printk("%02x ", (unsigned char)(tbuf)[j]);
760 printk("\n");
761 }
762 usb_unlock_device(dev);
763 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
764 usb_lock_device(dev);
765 }
766 kfree(tbuf);
767 if (i < 0)
768 return i;
769 return len2;
770 }
771
772 static int proc_resetep(struct dev_state *ps, void __user *arg)
773 {
774 unsigned int ep;
775 int ret;
776
777 if (get_user(ep, (unsigned int __user *)arg))
778 return -EFAULT;
779 if ((ret = findintfep(ps->dev, ep)) < 0)
780 return ret;
781 if ((ret = checkintf(ps, ret)))
782 return ret;
783 usb_settoggle(ps->dev, ep & 0xf, !(ep & USB_DIR_IN), 0);
784 return 0;
785 }
786
787 static int proc_clearhalt(struct dev_state *ps, void __user *arg)
788 {
789 unsigned int ep;
790 int pipe;
791 int ret;
792
793 if (get_user(ep, (unsigned int __user *)arg))
794 return -EFAULT;
795 if ((ret = findintfep(ps->dev, ep)) < 0)
796 return ret;
797 if ((ret = checkintf(ps, ret)))
798 return ret;
799 if (ep & USB_DIR_IN)
800 pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f);
801 else
802 pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f);
803
804 return usb_clear_halt(ps->dev, pipe);
805 }
806
807
808 static int proc_getdriver(struct dev_state *ps, void __user *arg)
809 {
810 struct usbdevfs_getdriver gd;
811 struct usb_interface *intf;
812 int ret;
813
814 if (copy_from_user(&gd, arg, sizeof(gd)))
815 return -EFAULT;
816 down_read(&usb_bus_type.subsys.rwsem);
817 intf = usb_ifnum_to_if(ps->dev, gd.interface);
818 if (!intf || !intf->dev.driver)
819 ret = -ENODATA;
820 else {
821 strncpy(gd.driver, intf->dev.driver->name,
822 sizeof(gd.driver));
823 ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0);
824 }
825 up_read(&usb_bus_type.subsys.rwsem);
826 return ret;
827 }
828
829 static int proc_connectinfo(struct dev_state *ps, void __user *arg)
830 {
831 struct usbdevfs_connectinfo ci;
832
833 ci.devnum = ps->dev->devnum;
834 ci.slow = ps->dev->speed == USB_SPEED_LOW;
835 if (copy_to_user(arg, &ci, sizeof(ci)))
836 return -EFAULT;
837 return 0;
838 }
839
840 static int proc_resetdevice(struct dev_state *ps)
841 {
842 return usb_reset_composite_device(ps->dev, NULL);
843 }
844
845 static int proc_setintf(struct dev_state *ps, void __user *arg)
846 {
847 struct usbdevfs_setinterface setintf;
848 int ret;
849
850 if (copy_from_user(&setintf, arg, sizeof(setintf)))
851 return -EFAULT;
852 if ((ret = checkintf(ps, setintf.interface)))
853 return ret;
854 return usb_set_interface(ps->dev, setintf.interface,
855 setintf.altsetting);
856 }
857
858 static int proc_setconfig(struct dev_state *ps, void __user *arg)
859 {
860 int u;
861 int status = 0;
862 struct usb_host_config *actconfig;
863
864 if (get_user(u, (int __user *)arg))
865 return -EFAULT;
866
867 actconfig = ps->dev->actconfig;
868
869 /* Don't touch the device if any interfaces are claimed.
870 * It could interfere with other drivers' operations, and if
871 * an interface is claimed by usbfs it could easily deadlock.
872 */
873 if (actconfig) {
874 int i;
875
876 for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) {
877 if (usb_interface_claimed(actconfig->interface[i])) {
878 dev_warn (&ps->dev->dev,
879 "usbfs: interface %d claimed by %s "
880 "while '%s' sets config #%d\n",
881 actconfig->interface[i]
882 ->cur_altsetting
883 ->desc.bInterfaceNumber,
884 actconfig->interface[i]
885 ->dev.driver->name,
886 current->comm, u);
887 status = -EBUSY;
888 break;
889 }
890 }
891 }
892
893 /* SET_CONFIGURATION is often abused as a "cheap" driver reset,
894 * so avoid usb_set_configuration()'s kick to sysfs
895 */
896 if (status == 0) {
897 if (actconfig && actconfig->desc.bConfigurationValue == u)
898 status = usb_reset_configuration(ps->dev);
899 else
900 status = usb_set_configuration(ps->dev, u);
901 }
902
903 return status;
904 }
905
906 static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
907 struct usbdevfs_iso_packet_desc __user *iso_frame_desc,
908 void __user *arg)
909 {
910 struct usbdevfs_iso_packet_desc *isopkt = NULL;
911 struct usb_host_endpoint *ep;
912 struct async *as;
913 struct usb_ctrlrequest *dr = NULL;
914 unsigned int u, totlen, isofrmlen;
915 int ret, interval = 0, ifnum = -1;
916
917 if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP|USBDEVFS_URB_SHORT_NOT_OK|
918 URB_NO_FSBR|URB_ZERO_PACKET))
919 return -EINVAL;
920 if (!uurb->buffer)
921 return -EINVAL;
922 if (uurb->signr != 0 && (uurb->signr < SIGRTMIN || uurb->signr > SIGRTMAX))
923 return -EINVAL;
924 if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL && (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) {
925 if ((ifnum = findintfep(ps->dev, uurb->endpoint)) < 0)
926 return ifnum;
927 if ((ret = checkintf(ps, ifnum)))
928 return ret;
929 }
930 if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0)
931 ep = ps->dev->ep_in [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
932 else
933 ep = ps->dev->ep_out [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
934 if (!ep)
935 return -ENOENT;
936 switch(uurb->type) {
937 case USBDEVFS_URB_TYPE_CONTROL:
938 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
939 != USB_ENDPOINT_XFER_CONTROL)
940 return -EINVAL;
941 /* min 8 byte setup packet, max 8 byte setup plus an arbitrary data stage */
942 if (uurb->buffer_length < 8 || uurb->buffer_length > (8 + MAX_USBFS_BUFFER_SIZE))
943 return -EINVAL;
944 if (!(dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL)))
945 return -ENOMEM;
946 if (copy_from_user(dr, uurb->buffer, 8)) {
947 kfree(dr);
948 return -EFAULT;
949 }
950 if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) {
951 kfree(dr);
952 return -EINVAL;
953 }
954 if ((ret = check_ctrlrecip(ps, dr->bRequestType, le16_to_cpup(&dr->wIndex)))) {
955 kfree(dr);
956 return ret;
957 }
958 uurb->endpoint = (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) | (dr->bRequestType & USB_ENDPOINT_DIR_MASK);
959 uurb->number_of_packets = 0;
960 uurb->buffer_length = le16_to_cpup(&dr->wLength);
961 uurb->buffer += 8;
962 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) {
963 kfree(dr);
964 return -EFAULT;
965 }
966 snoop(&ps->dev->dev, "control urb: bRequest=%02x "
967 "bRrequestType=%02x wValue=%04x "
968 "wIndex=%04x wLength=%04x\n",
969 dr->bRequest, dr->bRequestType, dr->wValue,
970 dr->wIndex, dr->wLength);
971 break;
972
973 case USBDEVFS_URB_TYPE_BULK:
974 switch (ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
975 case USB_ENDPOINT_XFER_CONTROL:
976 case USB_ENDPOINT_XFER_ISOC:
977 return -EINVAL;
978 /* allow single-shot interrupt transfers, at bogus rates */
979 }
980 uurb->number_of_packets = 0;
981 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE)
982 return -EINVAL;
983 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length))
984 return -EFAULT;
985 snoop(&ps->dev->dev, "bulk urb\n");
986 break;
987
988 case USBDEVFS_URB_TYPE_ISO:
989 /* arbitrary limit */
990 if (uurb->number_of_packets < 1 || uurb->number_of_packets > 128)
991 return -EINVAL;
992 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
993 != USB_ENDPOINT_XFER_ISOC)
994 return -EINVAL;
995 interval = 1 << min (15, ep->desc.bInterval - 1);
996 isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * uurb->number_of_packets;
997 if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL)))
998 return -ENOMEM;
999 if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) {
1000 kfree(isopkt);
1001 return -EFAULT;
1002 }
1003 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
1004 /* arbitrary limit, sufficient for USB 2.0 high-bandwidth iso */
1005 if (isopkt[u].length > 8192) {
1006 kfree(isopkt);
1007 return -EINVAL;
1008 }
1009 totlen += isopkt[u].length;
1010 }
1011 if (totlen > 32768) {
1012 kfree(isopkt);
1013 return -EINVAL;
1014 }
1015 uurb->buffer_length = totlen;
1016 snoop(&ps->dev->dev, "iso urb\n");
1017 break;
1018
1019 case USBDEVFS_URB_TYPE_INTERRUPT:
1020 uurb->number_of_packets = 0;
1021 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
1022 != USB_ENDPOINT_XFER_INT)
1023 return -EINVAL;
1024 if (ps->dev->speed == USB_SPEED_HIGH)
1025 interval = 1 << min (15, ep->desc.bInterval - 1);
1026 else
1027 interval = ep->desc.bInterval;
1028 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE)
1029 return -EINVAL;
1030 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length))
1031 return -EFAULT;
1032 snoop(&ps->dev->dev, "interrupt urb\n");
1033 break;
1034
1035 default:
1036 return -EINVAL;
1037 }
1038 if (!(as = alloc_async(uurb->number_of_packets))) {
1039 kfree(isopkt);
1040 kfree(dr);
1041 return -ENOMEM;
1042 }
1043 if (!(as->urb->transfer_buffer = kmalloc(uurb->buffer_length, GFP_KERNEL))) {
1044 kfree(isopkt);
1045 kfree(dr);
1046 free_async(as);
1047 return -ENOMEM;
1048 }
1049 as->urb->dev = ps->dev;
1050 as->urb->pipe = (uurb->type << 30) | __create_pipe(ps->dev, uurb->endpoint & 0xf) | (uurb->endpoint & USB_DIR_IN);
1051 as->urb->transfer_flags = uurb->flags;
1052 as->urb->transfer_buffer_length = uurb->buffer_length;
1053 as->urb->setup_packet = (unsigned char*)dr;
1054 as->urb->start_frame = uurb->start_frame;
1055 as->urb->number_of_packets = uurb->number_of_packets;
1056 as->urb->interval = interval;
1057 as->urb->context = as;
1058 as->urb->complete = async_completed;
1059 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
1060 as->urb->iso_frame_desc[u].offset = totlen;
1061 as->urb->iso_frame_desc[u].length = isopkt[u].length;
1062 totlen += isopkt[u].length;
1063 }
1064 kfree(isopkt);
1065 as->ps = ps;
1066 as->userurb = arg;
1067 if (uurb->endpoint & USB_DIR_IN)
1068 as->userbuffer = uurb->buffer;
1069 else
1070 as->userbuffer = NULL;
1071 as->signr = uurb->signr;
1072 as->ifnum = ifnum;
1073 as->pid = get_pid(task_pid(current));
1074 as->uid = current->uid;
1075 as->euid = current->euid;
1076 security_task_getsecid(current, &as->secid);
1077 if (!(uurb->endpoint & USB_DIR_IN)) {
1078 if (copy_from_user(as->urb->transfer_buffer, uurb->buffer, as->urb->transfer_buffer_length)) {
1079 free_async(as);
1080 return -EFAULT;
1081 }
1082 }
1083 snoop(&as->urb->dev->dev, "submit urb\n");
1084 snoop_urb(as->urb, as->userurb);
1085 async_newpending(as);
1086 if ((ret = usb_submit_urb(as->urb, GFP_KERNEL))) {
1087 dev_printk(KERN_DEBUG, &ps->dev->dev, "usbfs: usb_submit_urb returned %d\n", ret);
1088 async_removepending(as);
1089 free_async(as);
1090 return ret;
1091 }
1092 return 0;
1093 }
1094
1095 static int proc_submiturb(struct dev_state *ps, void __user *arg)
1096 {
1097 struct usbdevfs_urb uurb;
1098
1099 if (copy_from_user(&uurb, arg, sizeof(uurb)))
1100 return -EFAULT;
1101
1102 return proc_do_submiturb(ps, &uurb, (((struct usbdevfs_urb __user *)arg)->iso_frame_desc), arg);
1103 }
1104
1105 static int proc_unlinkurb(struct dev_state *ps, void __user *arg)
1106 {
1107 struct async *as;
1108
1109 as = async_getpending(ps, arg);
1110 if (!as)
1111 return -EINVAL;
1112 usb_kill_urb(as->urb);
1113 return 0;
1114 }
1115
1116 static int processcompl(struct async *as, void __user * __user *arg)
1117 {
1118 struct urb *urb = as->urb;
1119 struct usbdevfs_urb __user *userurb = as->userurb;
1120 void __user *addr = as->userurb;
1121 unsigned int i;
1122
1123 if (as->userbuffer)
1124 if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length))
1125 return -EFAULT;
1126 if (put_user(urb->status, &userurb->status))
1127 return -EFAULT;
1128 if (put_user(urb->actual_length, &userurb->actual_length))
1129 return -EFAULT;
1130 if (put_user(urb->error_count, &userurb->error_count))
1131 return -EFAULT;
1132
1133 if (usb_pipeisoc(urb->pipe)) {
1134 for (i = 0; i < urb->number_of_packets; i++) {
1135 if (put_user(urb->iso_frame_desc[i].actual_length,
1136 &userurb->iso_frame_desc[i].actual_length))
1137 return -EFAULT;
1138 if (put_user(urb->iso_frame_desc[i].status,
1139 &userurb->iso_frame_desc[i].status))
1140 return -EFAULT;
1141 }
1142 }
1143
1144 free_async(as);
1145
1146 if (put_user(addr, (void __user * __user *)arg))
1147 return -EFAULT;
1148 return 0;
1149 }
1150
1151 static struct async* reap_as(struct dev_state *ps)
1152 {
1153 DECLARE_WAITQUEUE(wait, current);
1154 struct async *as = NULL;
1155 struct usb_device *dev = ps->dev;
1156
1157 add_wait_queue(&ps->wait, &wait);
1158 for (;;) {
1159 __set_current_state(TASK_INTERRUPTIBLE);
1160 if ((as = async_getcompleted(ps)))
1161 break;
1162 if (signal_pending(current))
1163 break;
1164 usb_unlock_device(dev);
1165 schedule();
1166 usb_lock_device(dev);
1167 }
1168 remove_wait_queue(&ps->wait, &wait);
1169 set_current_state(TASK_RUNNING);
1170 return as;
1171 }
1172
1173 static int proc_reapurb(struct dev_state *ps, void __user *arg)
1174 {
1175 struct async *as = reap_as(ps);
1176 if (as)
1177 return processcompl(as, (void __user * __user *)arg);
1178 if (signal_pending(current))
1179 return -EINTR;
1180 return -EIO;
1181 }
1182
1183 static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg)
1184 {
1185 struct async *as;
1186
1187 if (!(as = async_getcompleted(ps)))
1188 return -EAGAIN;
1189 return processcompl(as, (void __user * __user *)arg);
1190 }
1191
1192 #ifdef CONFIG_COMPAT
1193
1194 static int get_urb32(struct usbdevfs_urb *kurb,
1195 struct usbdevfs_urb32 __user *uurb)
1196 {
1197 __u32 uptr;
1198 if (get_user(kurb->type, &uurb->type) ||
1199 __get_user(kurb->endpoint, &uurb->endpoint) ||
1200 __get_user(kurb->status, &uurb->status) ||
1201 __get_user(kurb->flags, &uurb->flags) ||
1202 __get_user(kurb->buffer_length, &uurb->buffer_length) ||
1203 __get_user(kurb->actual_length, &uurb->actual_length) ||
1204 __get_user(kurb->start_frame, &uurb->start_frame) ||
1205 __get_user(kurb->number_of_packets, &uurb->number_of_packets) ||
1206 __get_user(kurb->error_count, &uurb->error_count) ||
1207 __get_user(kurb->signr, &uurb->signr))
1208 return -EFAULT;
1209
1210 if (__get_user(uptr, &uurb->buffer))
1211 return -EFAULT;
1212 kurb->buffer = compat_ptr(uptr);
1213 if (__get_user(uptr, &uurb->buffer))
1214 return -EFAULT;
1215 kurb->usercontext = compat_ptr(uptr);
1216
1217 return 0;
1218 }
1219
1220 static int proc_submiturb_compat(struct dev_state *ps, void __user *arg)
1221 {
1222 struct usbdevfs_urb uurb;
1223
1224 if (get_urb32(&uurb,(struct usbdevfs_urb32 __user *)arg))
1225 return -EFAULT;
1226
1227 return proc_do_submiturb(ps, &uurb, ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc, arg);
1228 }
1229
1230 static int processcompl_compat(struct async *as, void __user * __user *arg)
1231 {
1232 struct urb *urb = as->urb;
1233 struct usbdevfs_urb32 __user *userurb = as->userurb;
1234 void __user *addr = as->userurb;
1235 unsigned int i;
1236
1237 if (as->userbuffer)
1238 if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length))
1239 return -EFAULT;
1240 if (put_user(urb->status, &userurb->status))
1241 return -EFAULT;
1242 if (put_user(urb->actual_length, &userurb->actual_length))
1243 return -EFAULT;
1244 if (put_user(urb->error_count, &userurb->error_count))
1245 return -EFAULT;
1246
1247 if (usb_pipeisoc(urb->pipe)) {
1248 for (i = 0; i < urb->number_of_packets; i++) {
1249 if (put_user(urb->iso_frame_desc[i].actual_length,
1250 &userurb->iso_frame_desc[i].actual_length))
1251 return -EFAULT;
1252 if (put_user(urb->iso_frame_desc[i].status,
1253 &userurb->iso_frame_desc[i].status))
1254 return -EFAULT;
1255 }
1256 }
1257
1258 free_async(as);
1259 if (put_user(ptr_to_compat(addr), (u32 __user *)arg))
1260 return -EFAULT;
1261 return 0;
1262 }
1263
1264 static int proc_reapurb_compat(struct dev_state *ps, void __user *arg)
1265 {
1266 struct async *as = reap_as(ps);
1267 if (as)
1268 return processcompl_compat(as, (void __user * __user *)arg);
1269 if (signal_pending(current))
1270 return -EINTR;
1271 return -EIO;
1272 }
1273
1274 static int proc_reapurbnonblock_compat(struct dev_state *ps, void __user *arg)
1275 {
1276 struct async *as;
1277
1278 if (!(as = async_getcompleted(ps)))
1279 return -EAGAIN;
1280 return processcompl_compat(as, (void __user * __user *)arg);
1281 }
1282
1283 #endif
1284
1285 static int proc_disconnectsignal(struct dev_state *ps, void __user *arg)
1286 {
1287 struct usbdevfs_disconnectsignal ds;
1288
1289 if (copy_from_user(&ds, arg, sizeof(ds)))
1290 return -EFAULT;
1291 if (ds.signr != 0 && (ds.signr < SIGRTMIN || ds.signr > SIGRTMAX))
1292 return -EINVAL;
1293 ps->discsignr = ds.signr;
1294 ps->disccontext = ds.context;
1295 return 0;
1296 }
1297
1298 static int proc_claiminterface(struct dev_state *ps, void __user *arg)
1299 {
1300 unsigned int ifnum;
1301
1302 if (get_user(ifnum, (unsigned int __user *)arg))
1303 return -EFAULT;
1304 return claimintf(ps, ifnum);
1305 }
1306
1307 static int proc_releaseinterface(struct dev_state *ps, void __user *arg)
1308 {
1309 unsigned int ifnum;
1310 int ret;
1311
1312 if (get_user(ifnum, (unsigned int __user *)arg))
1313 return -EFAULT;
1314 if ((ret = releaseintf(ps, ifnum)) < 0)
1315 return ret;
1316 destroy_async_on_interface (ps, ifnum);
1317 return 0;
1318 }
1319
1320 static int proc_ioctl(struct dev_state *ps, struct usbdevfs_ioctl *ctl)
1321 {
1322 int size;
1323 void *buf = NULL;
1324 int retval = 0;
1325 struct usb_interface *intf = NULL;
1326 struct usb_driver *driver = NULL;
1327
1328 /* alloc buffer */
1329 if ((size = _IOC_SIZE (ctl->ioctl_code)) > 0) {
1330 if ((buf = kmalloc (size, GFP_KERNEL)) == NULL)
1331 return -ENOMEM;
1332 if ((_IOC_DIR(ctl->ioctl_code) & _IOC_WRITE)) {
1333 if (copy_from_user (buf, ctl->data, size)) {
1334 kfree(buf);
1335 return -EFAULT;
1336 }
1337 } else {
1338 memset (buf, 0, size);
1339 }
1340 }
1341
1342 if (!connected(ps)) {
1343 kfree(buf);
1344 return -ENODEV;
1345 }
1346
1347 if (ps->dev->state != USB_STATE_CONFIGURED)
1348 retval = -EHOSTUNREACH;
1349 else if (!(intf = usb_ifnum_to_if (ps->dev, ctl->ifno)))
1350 retval = -EINVAL;
1351 else switch (ctl->ioctl_code) {
1352
1353 /* disconnect kernel driver from interface */
1354 case USBDEVFS_DISCONNECT:
1355
1356 down_write(&usb_bus_type.subsys.rwsem);
1357 if (intf->dev.driver) {
1358 driver = to_usb_driver(intf->dev.driver);
1359 dev_dbg (&intf->dev, "disconnect by usbfs\n");
1360 usb_driver_release_interface(driver, intf);
1361 } else
1362 retval = -ENODATA;
1363 up_write(&usb_bus_type.subsys.rwsem);
1364 break;
1365
1366 /* let kernel drivers try to (re)bind to the interface */
1367 case USBDEVFS_CONNECT:
1368 usb_unlock_device(ps->dev);
1369 retval = bus_rescan_devices(intf->dev.bus);
1370 usb_lock_device(ps->dev);
1371 break;
1372
1373 /* talk directly to the interface's driver */
1374 default:
1375 down_read(&usb_bus_type.subsys.rwsem);
1376 if (intf->dev.driver)
1377 driver = to_usb_driver(intf->dev.driver);
1378 if (driver == NULL || driver->ioctl == NULL) {
1379 retval = -ENOTTY;
1380 } else {
1381 retval = driver->ioctl (intf, ctl->ioctl_code, buf);
1382 if (retval == -ENOIOCTLCMD)
1383 retval = -ENOTTY;
1384 }
1385 up_read(&usb_bus_type.subsys.rwsem);
1386 }
1387
1388 /* cleanup and return */
1389 if (retval >= 0
1390 && (_IOC_DIR (ctl->ioctl_code) & _IOC_READ) != 0
1391 && size > 0
1392 && copy_to_user (ctl->data, buf, size) != 0)
1393 retval = -EFAULT;
1394
1395 kfree(buf);
1396 return retval;
1397 }
1398
1399 static int proc_ioctl_default(struct dev_state *ps, void __user *arg)
1400 {
1401 struct usbdevfs_ioctl ctrl;
1402
1403 if (copy_from_user(&ctrl, arg, sizeof (ctrl)))
1404 return -EFAULT;
1405 return proc_ioctl(ps, &ctrl);
1406 }
1407
1408 #ifdef CONFIG_COMPAT
1409 static int proc_ioctl_compat(struct dev_state *ps, compat_uptr_t arg)
1410 {
1411 struct usbdevfs_ioctl32 __user *uioc;
1412 struct usbdevfs_ioctl ctrl;
1413 u32 udata;
1414
1415 uioc = compat_ptr((long)arg);
1416 if (get_user(ctrl.ifno, &uioc->ifno) ||
1417 get_user(ctrl.ioctl_code, &uioc->ioctl_code) ||
1418 __get_user(udata, &uioc->data))
1419 return -EFAULT;
1420 ctrl.data = compat_ptr(udata);
1421
1422 return proc_ioctl(ps, &ctrl);
1423 }
1424 #endif
1425
1426 /*
1427 * NOTE: All requests here that have interface numbers as parameters
1428 * are assuming that somehow the configuration has been prevented from
1429 * changing. But there's no mechanism to ensure that...
1430 */
1431 static int usbdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
1432 {
1433 struct dev_state *ps = file->private_data;
1434 struct usb_device *dev = ps->dev;
1435 void __user *p = (void __user *)arg;
1436 int ret = -ENOTTY;
1437
1438 if (!(file->f_mode & FMODE_WRITE))
1439 return -EPERM;
1440 usb_lock_device(dev);
1441 if (!connected(ps)) {
1442 usb_unlock_device(dev);
1443 return -ENODEV;
1444 }
1445
1446 switch (cmd) {
1447 case USBDEVFS_CONTROL:
1448 snoop(&dev->dev, "%s: CONTROL\n", __FUNCTION__);
1449 ret = proc_control(ps, p);
1450 if (ret >= 0)
1451 inode->i_mtime = CURRENT_TIME;
1452 break;
1453
1454 case USBDEVFS_BULK:
1455 snoop(&dev->dev, "%s: BULK\n", __FUNCTION__);
1456 ret = proc_bulk(ps, p);
1457 if (ret >= 0)
1458 inode->i_mtime = CURRENT_TIME;
1459 break;
1460
1461 case USBDEVFS_RESETEP:
1462 snoop(&dev->dev, "%s: RESETEP\n", __FUNCTION__);
1463 ret = proc_resetep(ps, p);
1464 if (ret >= 0)
1465 inode->i_mtime = CURRENT_TIME;
1466 break;
1467
1468 case USBDEVFS_RESET:
1469 snoop(&dev->dev, "%s: RESET\n", __FUNCTION__);
1470 ret = proc_resetdevice(ps);
1471 break;
1472
1473 case USBDEVFS_CLEAR_HALT:
1474 snoop(&dev->dev, "%s: CLEAR_HALT\n", __FUNCTION__);
1475 ret = proc_clearhalt(ps, p);
1476 if (ret >= 0)
1477 inode->i_mtime = CURRENT_TIME;
1478 break;
1479
1480 case USBDEVFS_GETDRIVER:
1481 snoop(&dev->dev, "%s: GETDRIVER\n", __FUNCTION__);
1482 ret = proc_getdriver(ps, p);
1483 break;
1484
1485 case USBDEVFS_CONNECTINFO:
1486 snoop(&dev->dev, "%s: CONNECTINFO\n", __FUNCTION__);
1487 ret = proc_connectinfo(ps, p);
1488 break;
1489
1490 case USBDEVFS_SETINTERFACE:
1491 snoop(&dev->dev, "%s: SETINTERFACE\n", __FUNCTION__);
1492 ret = proc_setintf(ps, p);
1493 break;
1494
1495 case USBDEVFS_SETCONFIGURATION:
1496 snoop(&dev->dev, "%s: SETCONFIGURATION\n", __FUNCTION__);
1497 ret = proc_setconfig(ps, p);
1498 break;
1499
1500 case USBDEVFS_SUBMITURB:
1501 snoop(&dev->dev, "%s: SUBMITURB\n", __FUNCTION__);
1502 ret = proc_submiturb(ps, p);
1503 if (ret >= 0)
1504 inode->i_mtime = CURRENT_TIME;
1505 break;
1506
1507 #ifdef CONFIG_COMPAT
1508
1509 case USBDEVFS_SUBMITURB32:
1510 snoop(&dev->dev, "%s: SUBMITURB32\n", __FUNCTION__);
1511 ret = proc_submiturb_compat(ps, p);
1512 if (ret >= 0)
1513 inode->i_mtime = CURRENT_TIME;
1514 break;
1515
1516 case USBDEVFS_REAPURB32:
1517 snoop(&dev->dev, "%s: REAPURB32\n", __FUNCTION__);
1518 ret = proc_reapurb_compat(ps, p);
1519 break;
1520
1521 case USBDEVFS_REAPURBNDELAY32:
1522 snoop(&dev->dev, "%s: REAPURBDELAY32\n", __FUNCTION__);
1523 ret = proc_reapurbnonblock_compat(ps, p);
1524 break;
1525
1526 case USBDEVFS_IOCTL32:
1527 snoop(&dev->dev, "%s: IOCTL\n", __FUNCTION__);
1528 ret = proc_ioctl_compat(ps, ptr_to_compat(p));
1529 break;
1530 #endif
1531
1532 case USBDEVFS_DISCARDURB:
1533 snoop(&dev->dev, "%s: DISCARDURB\n", __FUNCTION__);
1534 ret = proc_unlinkurb(ps, p);
1535 break;
1536
1537 case USBDEVFS_REAPURB:
1538 snoop(&dev->dev, "%s: REAPURB\n", __FUNCTION__);
1539 ret = proc_reapurb(ps, p);
1540 break;
1541
1542 case USBDEVFS_REAPURBNDELAY:
1543 snoop(&dev->dev, "%s: REAPURBDELAY\n", __FUNCTION__);
1544 ret = proc_reapurbnonblock(ps, p);
1545 break;
1546
1547 case USBDEVFS_DISCSIGNAL:
1548 snoop(&dev->dev, "%s: DISCSIGNAL\n", __FUNCTION__);
1549 ret = proc_disconnectsignal(ps, p);
1550 break;
1551
1552 case USBDEVFS_CLAIMINTERFACE:
1553 snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __FUNCTION__);
1554 ret = proc_claiminterface(ps, p);
1555 break;
1556
1557 case USBDEVFS_RELEASEINTERFACE:
1558 snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __FUNCTION__);
1559 ret = proc_releaseinterface(ps, p);
1560 break;
1561
1562 case USBDEVFS_IOCTL:
1563 snoop(&dev->dev, "%s: IOCTL\n", __FUNCTION__);
1564 ret = proc_ioctl_default(ps, p);
1565 break;
1566 }
1567 usb_unlock_device(dev);
1568 if (ret >= 0)
1569 inode->i_atime = CURRENT_TIME;
1570 return ret;
1571 }
1572
1573 /* No kernel lock - fine */
1574 static unsigned int usbdev_poll(struct file *file, struct poll_table_struct *wait)
1575 {
1576 struct dev_state *ps = file->private_data;
1577 unsigned int mask = 0;
1578
1579 poll_wait(file, &ps->wait, wait);
1580 if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed))
1581 mask |= POLLOUT | POLLWRNORM;
1582 if (!connected(ps))
1583 mask |= POLLERR | POLLHUP;
1584 return mask;
1585 }
1586
1587 const struct file_operations usbfs_device_file_operations = {
1588 .llseek = usbdev_lseek,
1589 .read = usbdev_read,
1590 .poll = usbdev_poll,
1591 .ioctl = usbdev_ioctl,
1592 .open = usbdev_open,
1593 .release = usbdev_release,
1594 };
1595
1596 static int usbdev_add(struct usb_device *dev)
1597 {
1598 int minor = ((dev->bus->busnum-1) * 128) + (dev->devnum-1);
1599
1600 dev->usbfs_dev = device_create(usb_device_class, &dev->dev,
1601 MKDEV(USB_DEVICE_MAJOR, minor),
1602 "usbdev%d.%d", dev->bus->busnum, dev->devnum);
1603 if (IS_ERR(dev->usbfs_dev))
1604 return PTR_ERR(dev->usbfs_dev);
1605
1606 dev->usbfs_dev->platform_data = dev;
1607 return 0;
1608 }
1609
1610 static void usbdev_remove(struct usb_device *dev)
1611 {
1612 device_unregister(dev->usbfs_dev);
1613 }
1614
1615 static int usbdev_notify(struct notifier_block *self, unsigned long action,
1616 void *dev)
1617 {
1618 switch (action) {
1619 case USB_DEVICE_ADD:
1620 if (usbdev_add(dev))
1621 return NOTIFY_BAD;
1622 break;
1623 case USB_DEVICE_REMOVE:
1624 usbdev_remove(dev);
1625 break;
1626 }
1627 return NOTIFY_OK;
1628 }
1629
1630 static struct notifier_block usbdev_nb = {
1631 .notifier_call = usbdev_notify,
1632 };
1633
1634 static struct cdev usb_device_cdev = {
1635 .kobj = {.name = "usb_device", },
1636 .owner = THIS_MODULE,
1637 };
1638
1639 int __init usbdev_init(void)
1640 {
1641 int retval;
1642
1643 retval = register_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX,
1644 "usb_device");
1645 if (retval) {
1646 err("unable to register minors for usb_device");
1647 goto out;
1648 }
1649 cdev_init(&usb_device_cdev, &usbfs_device_file_operations);
1650 retval = cdev_add(&usb_device_cdev, USB_DEVICE_DEV, USB_DEVICE_MAX);
1651 if (retval) {
1652 err("unable to get usb_device major %d", USB_DEVICE_MAJOR);
1653 goto error_cdev;
1654 }
1655 usb_device_class = class_create(THIS_MODULE, "usb_device");
1656 if (IS_ERR(usb_device_class)) {
1657 err("unable to register usb_device class");
1658 retval = PTR_ERR(usb_device_class);
1659 goto error_class;
1660 }
1661
1662 usb_register_notify(&usbdev_nb);
1663
1664 out:
1665 return retval;
1666
1667 error_class:
1668 usb_device_class = NULL;
1669 cdev_del(&usb_device_cdev);
1670
1671 error_cdev:
1672 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
1673 goto out;
1674 }
1675
1676 void usbdev_cleanup(void)
1677 {
1678 usb_unregister_notify(&usbdev_nb);
1679 class_destroy(usb_device_class);
1680 cdev_del(&usb_device_cdev);
1681 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
1682 }
1683
linux v2.6.22.y-op