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Merge branch 'master' into upstream
[linux-2.6/zen-sources.git] / drivers / usb / core / devio.c
blob545da37afca7bdec6f464d547d575f02570d10cc
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 <asm/uaccess.h>
51 #include <asm/byteorder.h>
52 #include <linux/moduleparam.h>
53
54 #include "hcd.h" /* for usbcore internals */
55 #include "usb.h"
56
57 #define USB_MAXBUS 64
58 #define USB_DEVICE_MAX USB_MAXBUS * 128
59 static struct class *usb_device_class;
60
61 struct async {
62 struct list_head asynclist;
63 struct dev_state *ps;
64 pid_t pid;
65 uid_t uid, euid;
66 unsigned int signr;
67 unsigned int ifnum;
68 void __user *userbuffer;
69 void __user *userurb;
70 struct urb *urb;
71 };
72
73 static int usbfs_snoop = 0;
74 module_param (usbfs_snoop, bool, S_IRUGO | S_IWUSR);
75 MODULE_PARM_DESC (usbfs_snoop, "true to log all usbfs traffic");
76
77 #define snoop(dev, format, arg...) \
78 do { \
79 if (usbfs_snoop) \
80 dev_info( dev , format , ## arg); \
81 } while (0)
82
83 #define USB_DEVICE_DEV MKDEV(USB_DEVICE_MAJOR, 0)
84
85
86 #define MAX_USBFS_BUFFER_SIZE 16384
87
88 static inline int connected (struct usb_device *dev)
89 {
90 return dev->state != USB_STATE_NOTATTACHED;
91 }
92
93 static loff_t usbdev_lseek(struct file *file, loff_t offset, int orig)
94 {
95 loff_t ret;
96
97 lock_kernel();
98
99 switch (orig) {
100 case 0:
101 file->f_pos = offset;
102 ret = file->f_pos;
103 break;
104 case 1:
105 file->f_pos += offset;
106 ret = file->f_pos;
107 break;
108 case 2:
109 default:
110 ret = -EINVAL;
111 }
112
113 unlock_kernel();
114 return ret;
115 }
116
117 static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos)
118 {
119 struct dev_state *ps = (struct dev_state *)file->private_data;
120 struct usb_device *dev = ps->dev;
121 ssize_t ret = 0;
122 unsigned len;
123 loff_t pos;
124 int i;
125
126 pos = *ppos;
127 usb_lock_device(dev);
128 if (!connected(dev)) {
129 ret = -ENODEV;
130 goto err;
131 } else if (pos < 0) {
132 ret = -EINVAL;
133 goto err;
134 }
135
136 if (pos < sizeof(struct usb_device_descriptor)) {
137 struct usb_device_descriptor temp_desc ; /* 18 bytes - fits on the stack */
138
139 memcpy(&temp_desc, &dev->descriptor, sizeof(dev->descriptor));
140 le16_to_cpus(&temp_desc.bcdUSB);
141 le16_to_cpus(&temp_desc.idVendor);
142 le16_to_cpus(&temp_desc.idProduct);
143 le16_to_cpus(&temp_desc.bcdDevice);
144
145 len = sizeof(struct usb_device_descriptor) - pos;
146 if (len > nbytes)
147 len = nbytes;
148 if (copy_to_user(buf, ((char *)&temp_desc) + pos, len)) {
149 ret = -EFAULT;
150 goto err;
151 }
152
153 *ppos += len;
154 buf += len;
155 nbytes -= len;
156 ret += len;
157 }
158
159 pos = sizeof(struct usb_device_descriptor);
160 for (i = 0; nbytes && i < dev->descriptor.bNumConfigurations; i++) {
161 struct usb_config_descriptor *config =
162 (struct usb_config_descriptor *)dev->rawdescriptors[i];
163 unsigned int length = le16_to_cpu(config->wTotalLength);
164
165 if (*ppos < pos + length) {
166
167 /* The descriptor may claim to be longer than it
168 * really is. Here is the actual allocated length. */
169 unsigned alloclen =
170 le16_to_cpu(dev->config[i].desc.wTotalLength);
171
172 len = length - (*ppos - pos);
173 if (len > nbytes)
174 len = nbytes;
175
176 /* Simply don't write (skip over) unallocated parts */
177 if (alloclen > (*ppos - pos)) {
178 alloclen -= (*ppos - pos);
179 if (copy_to_user(buf,
180 dev->rawdescriptors[i] + (*ppos - pos),
181 min(len, alloclen))) {
182 ret = -EFAULT;
183 goto err;
184 }
185 }
186
187 *ppos += len;
188 buf += len;
189 nbytes -= len;
190 ret += len;
191 }
192
193 pos += length;
194 }
195
196 err:
197 usb_unlock_device(dev);
198 return ret;
199 }
200
201 /*
202 * async list handling
203 */
204
205 static struct async *alloc_async(unsigned int numisoframes)
206 {
207 unsigned int assize = sizeof(struct async) + numisoframes * sizeof(struct usb_iso_packet_descriptor);
208 struct async *as = kzalloc(assize, GFP_KERNEL);
209
210 if (!as)
211 return NULL;
212 as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL);
213 if (!as->urb) {
214 kfree(as);
215 return NULL;
216 }
217 return as;
218 }
219
220 static void free_async(struct async *as)
221 {
222 kfree(as->urb->transfer_buffer);
223 kfree(as->urb->setup_packet);
224 usb_free_urb(as->urb);
225 kfree(as);
226 }
227
228 static inline void async_newpending(struct async *as)
229 {
230 struct dev_state *ps = as->ps;
231 unsigned long flags;
232
233 spin_lock_irqsave(&ps->lock, flags);
234 list_add_tail(&as->asynclist, &ps->async_pending);
235 spin_unlock_irqrestore(&ps->lock, flags);
236 }
237
238 static inline void async_removepending(struct async *as)
239 {
240 struct dev_state *ps = as->ps;
241 unsigned long flags;
242
243 spin_lock_irqsave(&ps->lock, flags);
244 list_del_init(&as->asynclist);
245 spin_unlock_irqrestore(&ps->lock, flags);
246 }
247
248 static inline struct async *async_getcompleted(struct dev_state *ps)
249 {
250 unsigned long flags;
251 struct async *as = NULL;
252
253 spin_lock_irqsave(&ps->lock, flags);
254 if (!list_empty(&ps->async_completed)) {
255 as = list_entry(ps->async_completed.next, struct async, asynclist);
256 list_del_init(&as->asynclist);
257 }
258 spin_unlock_irqrestore(&ps->lock, flags);
259 return as;
260 }
261
262 static inline struct async *async_getpending(struct dev_state *ps, void __user *userurb)
263 {
264 unsigned long flags;
265 struct async *as;
266
267 spin_lock_irqsave(&ps->lock, flags);
268 list_for_each_entry(as, &ps->async_pending, asynclist)
269 if (as->userurb == userurb) {
270 list_del_init(&as->asynclist);
271 spin_unlock_irqrestore(&ps->lock, flags);
272 return as;
273 }
274 spin_unlock_irqrestore(&ps->lock, flags);
275 return NULL;
276 }
277
278 static void snoop_urb(struct urb *urb, void __user *userurb)
279 {
280 int j;
281 unsigned char *data = urb->transfer_buffer;
282
283 if (!usbfs_snoop)
284 return;
285
286 if (urb->pipe & USB_DIR_IN)
287 dev_info(&urb->dev->dev, "direction=IN\n");
288 else
289 dev_info(&urb->dev->dev, "direction=OUT\n");
290 dev_info(&urb->dev->dev, "userurb=%p\n", userurb);
291 dev_info(&urb->dev->dev, "transfer_buffer_length=%d\n",
292 urb->transfer_buffer_length);
293 dev_info(&urb->dev->dev, "actual_length=%d\n", urb->actual_length);
294 dev_info(&urb->dev->dev, "data: ");
295 for (j = 0; j < urb->transfer_buffer_length; ++j)
296 printk ("%02x ", data[j]);
297 printk("\n");
298 }
299
300 static void async_completed(struct urb *urb, struct pt_regs *regs)
301 {
302 struct async *as = (struct async *)urb->context;
303 struct dev_state *ps = as->ps;
304 struct siginfo sinfo;
305
306 spin_lock(&ps->lock);
307 list_move_tail(&as->asynclist, &ps->async_completed);
308 spin_unlock(&ps->lock);
309 if (as->signr) {
310 sinfo.si_signo = as->signr;
311 sinfo.si_errno = as->urb->status;
312 sinfo.si_code = SI_ASYNCIO;
313 sinfo.si_addr = as->userurb;
314 kill_proc_info_as_uid(as->signr, &sinfo, as->pid, as->uid,
315 as->euid);
316 }
317 snoop(&urb->dev->dev, "urb complete\n");
318 snoop_urb(urb, as->userurb);
319 wake_up(&ps->wait);
320 }
321
322 static void destroy_async (struct dev_state *ps, struct list_head *list)
323 {
324 struct async *as;
325 unsigned long flags;
326
327 spin_lock_irqsave(&ps->lock, flags);
328 while (!list_empty(list)) {
329 as = list_entry(list->next, struct async, asynclist);
330 list_del_init(&as->asynclist);
331
332 /* drop the spinlock so the completion handler can run */
333 spin_unlock_irqrestore(&ps->lock, flags);
334 usb_kill_urb(as->urb);
335 spin_lock_irqsave(&ps->lock, flags);
336 }
337 spin_unlock_irqrestore(&ps->lock, flags);
338 as = async_getcompleted(ps);
339 while (as) {
340 free_async(as);
341 as = async_getcompleted(ps);
342 }
343 }
344
345 static void destroy_async_on_interface (struct dev_state *ps, unsigned int ifnum)
346 {
347 struct list_head *p, *q, hitlist;
348 unsigned long flags;
349
350 INIT_LIST_HEAD(&hitlist);
351 spin_lock_irqsave(&ps->lock, flags);
352 list_for_each_safe(p, q, &ps->async_pending)
353 if (ifnum == list_entry(p, struct async, asynclist)->ifnum)
354 list_move_tail(p, &hitlist);
355 spin_unlock_irqrestore(&ps->lock, flags);
356 destroy_async(ps, &hitlist);
357 }
358
359 static inline void destroy_all_async(struct dev_state *ps)
360 {
361 destroy_async(ps, &ps->async_pending);
362 }
363
364 /*
365 * interface claims are made only at the request of user level code,
366 * which can also release them (explicitly or by closing files).
367 * they're also undone when devices disconnect.
368 */
369
370 static int driver_probe (struct usb_interface *intf,
371 const struct usb_device_id *id)
372 {
373 return -ENODEV;
374 }
375
376 static void driver_disconnect(struct usb_interface *intf)
377 {
378 struct dev_state *ps = usb_get_intfdata (intf);
379 unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber;
380
381 if (!ps)
382 return;
383
384 /* NOTE: this relies on usbcore having canceled and completed
385 * all pending I/O requests; 2.6 does that.
386 */
387
388 if (likely(ifnum < 8*sizeof(ps->ifclaimed)))
389 clear_bit(ifnum, &ps->ifclaimed);
390 else
391 warn("interface number %u out of range", ifnum);
392
393 usb_set_intfdata (intf, NULL);
394
395 /* force async requests to complete */
396 destroy_async_on_interface(ps, ifnum);
397 }
398
399 struct usb_driver usbfs_driver = {
400 .name = "usbfs",
401 .probe = driver_probe,
402 .disconnect = driver_disconnect,
403 };
404
405 static int claimintf(struct dev_state *ps, unsigned int ifnum)
406 {
407 struct usb_device *dev = ps->dev;
408 struct usb_interface *intf;
409 int err;
410
411 if (ifnum >= 8*sizeof(ps->ifclaimed))
412 return -EINVAL;
413 /* already claimed */
414 if (test_bit(ifnum, &ps->ifclaimed))
415 return 0;
416
417 /* lock against other changes to driver bindings */
418 down_write(&usb_bus_type.subsys.rwsem);
419 intf = usb_ifnum_to_if(dev, ifnum);
420 if (!intf)
421 err = -ENOENT;
422 else
423 err = usb_driver_claim_interface(&usbfs_driver, intf, ps);
424 up_write(&usb_bus_type.subsys.rwsem);
425 if (err == 0)
426 set_bit(ifnum, &ps->ifclaimed);
427 return err;
428 }
429
430 static int releaseintf(struct dev_state *ps, unsigned int ifnum)
431 {
432 struct usb_device *dev;
433 struct usb_interface *intf;
434 int err;
435
436 err = -EINVAL;
437 if (ifnum >= 8*sizeof(ps->ifclaimed))
438 return err;
439 dev = ps->dev;
440 /* lock against other changes to driver bindings */
441 down_write(&usb_bus_type.subsys.rwsem);
442 intf = usb_ifnum_to_if(dev, ifnum);
443 if (!intf)
444 err = -ENOENT;
445 else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) {
446 usb_driver_release_interface(&usbfs_driver, intf);
447 err = 0;
448 }
449 up_write(&usb_bus_type.subsys.rwsem);
450 return err;
451 }
452
453 static int checkintf(struct dev_state *ps, unsigned int ifnum)
454 {
455 if (ps->dev->state != USB_STATE_CONFIGURED)
456 return -EHOSTUNREACH;
457 if (ifnum >= 8*sizeof(ps->ifclaimed))
458 return -EINVAL;
459 if (test_bit(ifnum, &ps->ifclaimed))
460 return 0;
461 /* if not yet claimed, claim it for the driver */
462 dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim interface %u before use\n",
463 current->pid, current->comm, ifnum);
464 return claimintf(ps, ifnum);
465 }
466
467 static int findintfep(struct usb_device *dev, unsigned int ep)
468 {
469 unsigned int i, j, e;
470 struct usb_interface *intf;
471 struct usb_host_interface *alts;
472 struct usb_endpoint_descriptor *endpt;
473
474 if (ep & ~(USB_DIR_IN|0xf))
475 return -EINVAL;
476 if (!dev->actconfig)
477 return -ESRCH;
478 for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) {
479 intf = dev->actconfig->interface[i];
480 for (j = 0; j < intf->num_altsetting; j++) {
481 alts = &intf->altsetting[j];
482 for (e = 0; e < alts->desc.bNumEndpoints; e++) {
483 endpt = &alts->endpoint[e].desc;
484 if (endpt->bEndpointAddress == ep)
485 return alts->desc.bInterfaceNumber;
486 }
487 }
488 }
489 return -ENOENT;
490 }
491
492 static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype, unsigned int index)
493 {
494 int ret = 0;
495
496 if (ps->dev->state != USB_STATE_ADDRESS
497 && ps->dev->state != USB_STATE_CONFIGURED)
498 return -EHOSTUNREACH;
499 if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype))
500 return 0;
501
502 index &= 0xff;
503 switch (requesttype & USB_RECIP_MASK) {
504 case USB_RECIP_ENDPOINT:
505 if ((ret = findintfep(ps->dev, index)) >= 0)
506 ret = checkintf(ps, ret);
507 break;
508
509 case USB_RECIP_INTERFACE:
510 ret = checkintf(ps, index);
511 break;
512 }
513 return ret;
514 }
515
516 static struct usb_device *usbdev_lookup_minor(int minor)
517 {
518 struct class_device *class_dev;
519 struct usb_device *dev = NULL;
520
521 down(&usb_device_class->sem);
522 list_for_each_entry(class_dev, &usb_device_class->children, node) {
523 if (class_dev->devt == MKDEV(USB_DEVICE_MAJOR, minor)) {
524 dev = class_dev->class_data;
525 break;
526 }
527 }
528 up(&usb_device_class->sem);
529
530 return dev;
531 };
532
533 /*
534 * file operations
535 */
536 static int usbdev_open(struct inode *inode, struct file *file)
537 {
538 struct usb_device *dev = NULL;
539 struct dev_state *ps;
540 int ret;
541
542 /*
543 * no locking necessary here, as chrdev_open has the kernel lock
544 * (still acquire the kernel lock for safety)
545 */
546 ret = -ENOMEM;
547 if (!(ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL)))
548 goto out_nolock;
549
550 lock_kernel();
551 ret = -ENOENT;
552 /* check if we are called from a real node or usbfs */
553 if (imajor(inode) == USB_DEVICE_MAJOR)
554 dev = usbdev_lookup_minor(iminor(inode));
555 if (!dev)
556 dev = inode->u.generic_ip;
557 if (!dev) {
558 kfree(ps);
559 goto out;
560 }
561 usb_get_dev(dev);
562 ret = 0;
563 ps->dev = dev;
564 ps->file = file;
565 spin_lock_init(&ps->lock);
566 INIT_LIST_HEAD(&ps->async_pending);
567 INIT_LIST_HEAD(&ps->async_completed);
568 init_waitqueue_head(&ps->wait);
569 ps->discsignr = 0;
570 ps->disc_pid = current->pid;
571 ps->disc_uid = current->uid;
572 ps->disc_euid = current->euid;
573 ps->disccontext = NULL;
574 ps->ifclaimed = 0;
575 wmb();
576 list_add_tail(&ps->list, &dev->filelist);
577 file->private_data = ps;
578 out:
579 unlock_kernel();
580 out_nolock:
581 return ret;
582 }
583
584 static int usbdev_release(struct inode *inode, struct file *file)
585 {
586 struct dev_state *ps = (struct dev_state *)file->private_data;
587 struct usb_device *dev = ps->dev;
588 unsigned int ifnum;
589
590 usb_lock_device(dev);
591 list_del_init(&ps->list);
592 for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed);
593 ifnum++) {
594 if (test_bit(ifnum, &ps->ifclaimed))
595 releaseintf(ps, ifnum);
596 }
597 destroy_all_async(ps);
598 usb_unlock_device(dev);
599 usb_put_dev(dev);
600 ps->dev = NULL;
601 kfree(ps);
602 return 0;
603 }
604
605 static int proc_control(struct dev_state *ps, void __user *arg)
606 {
607 struct usb_device *dev = ps->dev;
608 struct usbdevfs_ctrltransfer ctrl;
609 unsigned int tmo;
610 unsigned char *tbuf;
611 int i, j, ret;
612
613 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
614 return -EFAULT;
615 if ((ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.wIndex)))
616 return ret;
617 if (ctrl.wLength > PAGE_SIZE)
618 return -EINVAL;
619 if (!(tbuf = (unsigned char *)__get_free_page(GFP_KERNEL)))
620 return -ENOMEM;
621 tmo = ctrl.timeout;
622 if (ctrl.bRequestType & 0x80) {
623 if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data, ctrl.wLength)) {
624 free_page((unsigned long)tbuf);
625 return -EINVAL;
626 }
627 snoop(&dev->dev, "control read: bRequest=%02x "
628 "bRrequestType=%02x wValue=%04x "
629 "wIndex=%04x wLength=%04x\n",
630 ctrl.bRequest, ctrl.bRequestType, ctrl.wValue,
631 ctrl.wIndex, ctrl.wLength);
632
633 usb_unlock_device(dev);
634 i = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType,
635 ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo);
636 usb_lock_device(dev);
637 if ((i > 0) && ctrl.wLength) {
638 if (usbfs_snoop) {
639 dev_info(&dev->dev, "control read: data ");
640 for (j = 0; j < i; ++j)
641 printk("%02x ", (unsigned char)(tbuf)[j]);
642 printk("\n");
643 }
644 if (copy_to_user(ctrl.data, tbuf, i)) {
645 free_page((unsigned long)tbuf);
646 return -EFAULT;
647 }
648 }
649 } else {
650 if (ctrl.wLength) {
651 if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) {
652 free_page((unsigned long)tbuf);
653 return -EFAULT;
654 }
655 }
656 snoop(&dev->dev, "control write: bRequest=%02x "
657 "bRrequestType=%02x wValue=%04x "
658 "wIndex=%04x wLength=%04x\n",
659 ctrl.bRequest, ctrl.bRequestType, ctrl.wValue,
660 ctrl.wIndex, ctrl.wLength);
661 if (usbfs_snoop) {
662 dev_info(&dev->dev, "control write: data: ");
663 for (j = 0; j < ctrl.wLength; ++j)
664 printk("%02x ", (unsigned char)(tbuf)[j]);
665 printk("\n");
666 }
667 usb_unlock_device(dev);
668 i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType,
669 ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo);
670 usb_lock_device(dev);
671 }
672 free_page((unsigned long)tbuf);
673 if (i<0 && i != -EPIPE) {
674 dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL "
675 "failed cmd %s rqt %u rq %u len %u ret %d\n",
676 current->comm, ctrl.bRequestType, ctrl.bRequest,
677 ctrl.wLength, i);
678 }
679 return i;
680 }
681
682 static int proc_bulk(struct dev_state *ps, void __user *arg)
683 {
684 struct usb_device *dev = ps->dev;
685 struct usbdevfs_bulktransfer bulk;
686 unsigned int tmo, len1, pipe;
687 int len2;
688 unsigned char *tbuf;
689 int i, j, ret;
690
691 if (copy_from_user(&bulk, arg, sizeof(bulk)))
692 return -EFAULT;
693 if ((ret = findintfep(ps->dev, bulk.ep)) < 0)
694 return ret;
695 if ((ret = checkintf(ps, ret)))
696 return ret;
697 if (bulk.ep & USB_DIR_IN)
698 pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f);
699 else
700 pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f);
701 if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN)))
702 return -EINVAL;
703 len1 = bulk.len;
704 if (len1 > MAX_USBFS_BUFFER_SIZE)
705 return -EINVAL;
706 if (!(tbuf = kmalloc(len1, GFP_KERNEL)))
707 return -ENOMEM;
708 tmo = bulk.timeout;
709 if (bulk.ep & 0x80) {
710 if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) {
711 kfree(tbuf);
712 return -EINVAL;
713 }
714 snoop(&dev->dev, "bulk read: len=0x%02x timeout=%04d\n",
715 bulk.len, bulk.timeout);
716 usb_unlock_device(dev);
717 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
718 usb_lock_device(dev);
719 if (!i && len2) {
720 if (usbfs_snoop) {
721 dev_info(&dev->dev, "bulk read: data ");
722 for (j = 0; j < len2; ++j)
723 printk("%02x ", (unsigned char)(tbuf)[j]);
724 printk("\n");
725 }
726 if (copy_to_user(bulk.data, tbuf, len2)) {
727 kfree(tbuf);
728 return -EFAULT;
729 }
730 }
731 } else {
732 if (len1) {
733 if (copy_from_user(tbuf, bulk.data, len1)) {
734 kfree(tbuf);
735 return -EFAULT;
736 }
737 }
738 snoop(&dev->dev, "bulk write: len=0x%02x timeout=%04d\n",
739 bulk.len, bulk.timeout);
740 if (usbfs_snoop) {
741 dev_info(&dev->dev, "bulk write: data: ");
742 for (j = 0; j < len1; ++j)
743 printk("%02x ", (unsigned char)(tbuf)[j]);
744 printk("\n");
745 }
746 usb_unlock_device(dev);
747 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
748 usb_lock_device(dev);
749 }
750 kfree(tbuf);
751 if (i < 0)
752 return i;
753 return len2;
754 }
755
756 static int proc_resetep(struct dev_state *ps, void __user *arg)
757 {
758 unsigned int ep;
759 int ret;
760
761 if (get_user(ep, (unsigned int __user *)arg))
762 return -EFAULT;
763 if ((ret = findintfep(ps->dev, ep)) < 0)
764 return ret;
765 if ((ret = checkintf(ps, ret)))
766 return ret;
767 usb_settoggle(ps->dev, ep & 0xf, !(ep & USB_DIR_IN), 0);
768 return 0;
769 }
770
771 static int proc_clearhalt(struct dev_state *ps, void __user *arg)
772 {
773 unsigned int ep;
774 int pipe;
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 if (ep & USB_DIR_IN)
784 pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f);
785 else
786 pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f);
787
788 return usb_clear_halt(ps->dev, pipe);
789 }
790
791
792 static int proc_getdriver(struct dev_state *ps, void __user *arg)
793 {
794 struct usbdevfs_getdriver gd;
795 struct usb_interface *intf;
796 int ret;
797
798 if (copy_from_user(&gd, arg, sizeof(gd)))
799 return -EFAULT;
800 down_read(&usb_bus_type.subsys.rwsem);
801 intf = usb_ifnum_to_if(ps->dev, gd.interface);
802 if (!intf || !intf->dev.driver)
803 ret = -ENODATA;
804 else {
805 strncpy(gd.driver, intf->dev.driver->name,
806 sizeof(gd.driver));
807 ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0);
808 }
809 up_read(&usb_bus_type.subsys.rwsem);
810 return ret;
811 }
812
813 static int proc_connectinfo(struct dev_state *ps, void __user *arg)
814 {
815 struct usbdevfs_connectinfo ci;
816
817 ci.devnum = ps->dev->devnum;
818 ci.slow = ps->dev->speed == USB_SPEED_LOW;
819 if (copy_to_user(arg, &ci, sizeof(ci)))
820 return -EFAULT;
821 return 0;
822 }
823
824 static int proc_resetdevice(struct dev_state *ps)
825 {
826 return usb_reset_device(ps->dev);
827
828 }
829
830 static int proc_setintf(struct dev_state *ps, void __user *arg)
831 {
832 struct usbdevfs_setinterface setintf;
833 int ret;
834
835 if (copy_from_user(&setintf, arg, sizeof(setintf)))
836 return -EFAULT;
837 if ((ret = checkintf(ps, setintf.interface)))
838 return ret;
839 return usb_set_interface(ps->dev, setintf.interface,
840 setintf.altsetting);
841 }
842
843 static int proc_setconfig(struct dev_state *ps, void __user *arg)
844 {
845 unsigned int u;
846 int status = 0;
847 struct usb_host_config *actconfig;
848
849 if (get_user(u, (unsigned int __user *)arg))
850 return -EFAULT;
851
852 actconfig = ps->dev->actconfig;
853
854 /* Don't touch the device if any interfaces are claimed.
855 * It could interfere with other drivers' operations, and if
856 * an interface is claimed by usbfs it could easily deadlock.
857 */
858 if (actconfig) {
859 int i;
860
861 for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) {
862 if (usb_interface_claimed(actconfig->interface[i])) {
863 dev_warn (&ps->dev->dev,
864 "usbfs: interface %d claimed by %s "
865 "while '%s' sets config #%d\n",
866 actconfig->interface[i]
867 ->cur_altsetting
868 ->desc.bInterfaceNumber,
869 actconfig->interface[i]
870 ->dev.driver->name,
871 current->comm, u);
872 status = -EBUSY;
873 break;
874 }
875 }
876 }
877
878 /* SET_CONFIGURATION is often abused as a "cheap" driver reset,
879 * so avoid usb_set_configuration()'s kick to sysfs
880 */
881 if (status == 0) {
882 if (actconfig && actconfig->desc.bConfigurationValue == u)
883 status = usb_reset_configuration(ps->dev);
884 else
885 status = usb_set_configuration(ps->dev, u);
886 }
887
888 return status;
889 }
890
891 static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
892 struct usbdevfs_iso_packet_desc __user *iso_frame_desc,
893 void __user *arg)
894 {
895 struct usbdevfs_iso_packet_desc *isopkt = NULL;
896 struct usb_host_endpoint *ep;
897 struct async *as;
898 struct usb_ctrlrequest *dr = NULL;
899 unsigned int u, totlen, isofrmlen;
900 int ret, interval = 0, ifnum = -1;
901
902 if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP|USBDEVFS_URB_SHORT_NOT_OK|
903 URB_NO_FSBR|URB_ZERO_PACKET))
904 return -EINVAL;
905 if (!uurb->buffer)
906 return -EINVAL;
907 if (uurb->signr != 0 && (uurb->signr < SIGRTMIN || uurb->signr > SIGRTMAX))
908 return -EINVAL;
909 if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL && (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) {
910 if ((ifnum = findintfep(ps->dev, uurb->endpoint)) < 0)
911 return ifnum;
912 if ((ret = checkintf(ps, ifnum)))
913 return ret;
914 }
915 if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0)
916 ep = ps->dev->ep_in [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
917 else
918 ep = ps->dev->ep_out [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
919 if (!ep)
920 return -ENOENT;
921 switch(uurb->type) {
922 case USBDEVFS_URB_TYPE_CONTROL:
923 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
924 != USB_ENDPOINT_XFER_CONTROL)
925 return -EINVAL;
926 /* min 8 byte setup packet, max arbitrary */
927 if (uurb->buffer_length < 8 || uurb->buffer_length > PAGE_SIZE)
928 return -EINVAL;
929 if (!(dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL)))
930 return -ENOMEM;
931 if (copy_from_user(dr, uurb->buffer, 8)) {
932 kfree(dr);
933 return -EFAULT;
934 }
935 if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) {
936 kfree(dr);
937 return -EINVAL;
938 }
939 if ((ret = check_ctrlrecip(ps, dr->bRequestType, le16_to_cpup(&dr->wIndex)))) {
940 kfree(dr);
941 return ret;
942 }
943 uurb->endpoint = (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) | (dr->bRequestType & USB_ENDPOINT_DIR_MASK);
944 uurb->number_of_packets = 0;
945 uurb->buffer_length = le16_to_cpup(&dr->wLength);
946 uurb->buffer += 8;
947 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) {
948 kfree(dr);
949 return -EFAULT;
950 }
951 snoop(&ps->dev->dev, "control urb\n");
952 break;
953
954 case USBDEVFS_URB_TYPE_BULK:
955 switch (ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
956 case USB_ENDPOINT_XFER_CONTROL:
957 case USB_ENDPOINT_XFER_ISOC:
958 return -EINVAL;
959 /* allow single-shot interrupt transfers, at bogus rates */
960 }
961 uurb->number_of_packets = 0;
962 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE)
963 return -EINVAL;
964 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length))
965 return -EFAULT;
966 snoop(&ps->dev->dev, "bulk urb\n");
967 break;
968
969 case USBDEVFS_URB_TYPE_ISO:
970 /* arbitrary limit */
971 if (uurb->number_of_packets < 1 || uurb->number_of_packets > 128)
972 return -EINVAL;
973 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
974 != USB_ENDPOINT_XFER_ISOC)
975 return -EINVAL;
976 interval = 1 << min (15, ep->desc.bInterval - 1);
977 isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * uurb->number_of_packets;
978 if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL)))
979 return -ENOMEM;
980 if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) {
981 kfree(isopkt);
982 return -EFAULT;
983 }
984 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
985 if (isopkt[u].length > 1023) {
986 kfree(isopkt);
987 return -EINVAL;
988 }
989 totlen += isopkt[u].length;
990 }
991 if (totlen > 32768) {
992 kfree(isopkt);
993 return -EINVAL;
994 }
995 uurb->buffer_length = totlen;
996 snoop(&ps->dev->dev, "iso urb\n");
997 break;
998
999 case USBDEVFS_URB_TYPE_INTERRUPT:
1000 uurb->number_of_packets = 0;
1001 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
1002 != USB_ENDPOINT_XFER_INT)
1003 return -EINVAL;
1004 if (ps->dev->speed == USB_SPEED_HIGH)
1005 interval = 1 << min (15, ep->desc.bInterval - 1);
1006 else
1007 interval = ep->desc.bInterval;
1008 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE)
1009 return -EINVAL;
1010 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length))
1011 return -EFAULT;
1012 snoop(&ps->dev->dev, "interrupt urb\n");
1013 break;
1014
1015 default:
1016 return -EINVAL;
1017 }
1018 if (!(as = alloc_async(uurb->number_of_packets))) {
1019 kfree(isopkt);
1020 kfree(dr);
1021 return -ENOMEM;
1022 }
1023 if (!(as->urb->transfer_buffer = kmalloc(uurb->buffer_length, GFP_KERNEL))) {
1024 kfree(isopkt);
1025 kfree(dr);
1026 free_async(as);
1027 return -ENOMEM;
1028 }
1029 as->urb->dev = ps->dev;
1030 as->urb->pipe = (uurb->type << 30) | __create_pipe(ps->dev, uurb->endpoint & 0xf) | (uurb->endpoint & USB_DIR_IN);
1031 as->urb->transfer_flags = uurb->flags;
1032 as->urb->transfer_buffer_length = uurb->buffer_length;
1033 as->urb->setup_packet = (unsigned char*)dr;
1034 as->urb->start_frame = uurb->start_frame;
1035 as->urb->number_of_packets = uurb->number_of_packets;
1036 as->urb->interval = interval;
1037 as->urb->context = as;
1038 as->urb->complete = async_completed;
1039 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
1040 as->urb->iso_frame_desc[u].offset = totlen;
1041 as->urb->iso_frame_desc[u].length = isopkt[u].length;
1042 totlen += isopkt[u].length;
1043 }
1044 kfree(isopkt);
1045 as->ps = ps;
1046 as->userurb = arg;
1047 if (uurb->endpoint & USB_DIR_IN)
1048 as->userbuffer = uurb->buffer;
1049 else
1050 as->userbuffer = NULL;
1051 as->signr = uurb->signr;
1052 as->ifnum = ifnum;
1053 as->pid = current->pid;
1054 as->uid = current->uid;
1055 as->euid = current->euid;
1056 if (!(uurb->endpoint & USB_DIR_IN)) {
1057 if (copy_from_user(as->urb->transfer_buffer, uurb->buffer, as->urb->transfer_buffer_length)) {
1058 free_async(as);
1059 return -EFAULT;
1060 }
1061 }
1062 snoop(&as->urb->dev->dev, "submit urb\n");
1063 snoop_urb(as->urb, as->userurb);
1064 async_newpending(as);
1065 if ((ret = usb_submit_urb(as->urb, GFP_KERNEL))) {
1066 dev_printk(KERN_DEBUG, &ps->dev->dev, "usbfs: usb_submit_urb returned %d\n", ret);
1067 async_removepending(as);
1068 free_async(as);
1069 return ret;
1070 }
1071 return 0;
1072 }
1073
1074 static int proc_submiturb(struct dev_state *ps, void __user *arg)
1075 {
1076 struct usbdevfs_urb uurb;
1077
1078 if (copy_from_user(&uurb, arg, sizeof(uurb)))
1079 return -EFAULT;
1080
1081 return proc_do_submiturb(ps, &uurb, (((struct usbdevfs_urb __user *)arg)->iso_frame_desc), arg);
1082 }
1083
1084 static int proc_unlinkurb(struct dev_state *ps, void __user *arg)
1085 {
1086 struct async *as;
1087
1088 as = async_getpending(ps, arg);
1089 if (!as)
1090 return -EINVAL;
1091 usb_kill_urb(as->urb);
1092 return 0;
1093 }
1094
1095 static int processcompl(struct async *as, void __user * __user *arg)
1096 {
1097 struct urb *urb = as->urb;
1098 struct usbdevfs_urb __user *userurb = as->userurb;
1099 void __user *addr = as->userurb;
1100 unsigned int i;
1101
1102 if (as->userbuffer)
1103 if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length))
1104 return -EFAULT;
1105 if (put_user(urb->status, &userurb->status))
1106 return -EFAULT;
1107 if (put_user(urb->actual_length, &userurb->actual_length))
1108 return -EFAULT;
1109 if (put_user(urb->error_count, &userurb->error_count))
1110 return -EFAULT;
1111
1112 if (usb_pipeisoc(urb->pipe)) {
1113 for (i = 0; i < urb->number_of_packets; i++) {
1114 if (put_user(urb->iso_frame_desc[i].actual_length,
1115 &userurb->iso_frame_desc[i].actual_length))
1116 return -EFAULT;
1117 if (put_user(urb->iso_frame_desc[i].status,
1118 &userurb->iso_frame_desc[i].status))
1119 return -EFAULT;
1120 }
1121 }
1122
1123 free_async(as);
1124
1125 if (put_user(addr, (void __user * __user *)arg))
1126 return -EFAULT;
1127 return 0;
1128 }
1129
1130 static struct async* reap_as(struct dev_state *ps)
1131 {
1132 DECLARE_WAITQUEUE(wait, current);
1133 struct async *as = NULL;
1134 struct usb_device *dev = ps->dev;
1135
1136 add_wait_queue(&ps->wait, &wait);
1137 for (;;) {
1138 __set_current_state(TASK_INTERRUPTIBLE);
1139 if ((as = async_getcompleted(ps)))
1140 break;
1141 if (signal_pending(current))
1142 break;
1143 usb_unlock_device(dev);
1144 schedule();
1145 usb_lock_device(dev);
1146 }
1147 remove_wait_queue(&ps->wait, &wait);
1148 set_current_state(TASK_RUNNING);
1149 return as;
1150 }
1151
1152 static int proc_reapurb(struct dev_state *ps, void __user *arg)
1153 {
1154 struct async *as = reap_as(ps);
1155 if (as)
1156 return processcompl(as, (void __user * __user *)arg);
1157 if (signal_pending(current))
1158 return -EINTR;
1159 return -EIO;
1160 }
1161
1162 static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg)
1163 {
1164 struct async *as;
1165
1166 if (!(as = async_getcompleted(ps)))
1167 return -EAGAIN;
1168 return processcompl(as, (void __user * __user *)arg);
1169 }
1170
1171 #ifdef CONFIG_COMPAT
1172
1173 static int get_urb32(struct usbdevfs_urb *kurb,
1174 struct usbdevfs_urb32 __user *uurb)
1175 {
1176 __u32 uptr;
1177 if (get_user(kurb->type, &uurb->type) ||
1178 __get_user(kurb->endpoint, &uurb->endpoint) ||
1179 __get_user(kurb->status, &uurb->status) ||
1180 __get_user(kurb->flags, &uurb->flags) ||
1181 __get_user(kurb->buffer_length, &uurb->buffer_length) ||
1182 __get_user(kurb->actual_length, &uurb->actual_length) ||
1183 __get_user(kurb->start_frame, &uurb->start_frame) ||
1184 __get_user(kurb->number_of_packets, &uurb->number_of_packets) ||
1185 __get_user(kurb->error_count, &uurb->error_count) ||
1186 __get_user(kurb->signr, &uurb->signr))
1187 return -EFAULT;
1188
1189 if (__get_user(uptr, &uurb->buffer))
1190 return -EFAULT;
1191 kurb->buffer = compat_ptr(uptr);
1192 if (__get_user(uptr, &uurb->buffer))
1193 return -EFAULT;
1194 kurb->usercontext = compat_ptr(uptr);
1195
1196 return 0;
1197 }
1198
1199 static int proc_submiturb_compat(struct dev_state *ps, void __user *arg)
1200 {
1201 struct usbdevfs_urb uurb;
1202
1203 if (get_urb32(&uurb,(struct usbdevfs_urb32 *)arg))
1204 return -EFAULT;
1205
1206 return proc_do_submiturb(ps, &uurb, ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc, arg);
1207 }
1208
1209 static int processcompl_compat(struct async *as, void __user * __user *arg)
1210 {
1211 struct urb *urb = as->urb;
1212 struct usbdevfs_urb32 __user *userurb = as->userurb;
1213 void __user *addr = as->userurb;
1214 unsigned int i;
1215
1216 if (as->userbuffer)
1217 if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length))
1218 return -EFAULT;
1219 if (put_user(urb->status, &userurb->status))
1220 return -EFAULT;
1221 if (put_user(urb->actual_length, &userurb->actual_length))
1222 return -EFAULT;
1223 if (put_user(urb->error_count, &userurb->error_count))
1224 return -EFAULT;
1225
1226 if (usb_pipeisoc(urb->pipe)) {
1227 for (i = 0; i < urb->number_of_packets; i++) {
1228 if (put_user(urb->iso_frame_desc[i].actual_length,
1229 &userurb->iso_frame_desc[i].actual_length))
1230 return -EFAULT;
1231 if (put_user(urb->iso_frame_desc[i].status,
1232 &userurb->iso_frame_desc[i].status))
1233 return -EFAULT;
1234 }
1235 }
1236
1237 free_async(as);
1238 if (put_user((u32)(u64)addr, (u32 __user *)arg))
1239 return -EFAULT;
1240 return 0;
1241 }
1242
1243 static int proc_reapurb_compat(struct dev_state *ps, void __user *arg)
1244 {
1245 struct async *as = reap_as(ps);
1246 if (as)
1247 return processcompl_compat(as, (void __user * __user *)arg);
1248 if (signal_pending(current))
1249 return -EINTR;
1250 return -EIO;
1251 }
1252
1253 static int proc_reapurbnonblock_compat(struct dev_state *ps, void __user *arg)
1254 {
1255 struct async *as;
1256
1257 if (!(as = async_getcompleted(ps)))
1258 return -EAGAIN;
1259 return processcompl_compat(as, (void __user * __user *)arg);
1260 }
1261
1262 #endif
1263
1264 static int proc_disconnectsignal(struct dev_state *ps, void __user *arg)
1265 {
1266 struct usbdevfs_disconnectsignal ds;
1267
1268 if (copy_from_user(&ds, arg, sizeof(ds)))
1269 return -EFAULT;
1270 if (ds.signr != 0 && (ds.signr < SIGRTMIN || ds.signr > SIGRTMAX))
1271 return -EINVAL;
1272 ps->discsignr = ds.signr;
1273 ps->disccontext = ds.context;
1274 return 0;
1275 }
1276
1277 static int proc_claiminterface(struct dev_state *ps, void __user *arg)
1278 {
1279 unsigned int ifnum;
1280
1281 if (get_user(ifnum, (unsigned int __user *)arg))
1282 return -EFAULT;
1283 return claimintf(ps, ifnum);
1284 }
1285
1286 static int proc_releaseinterface(struct dev_state *ps, void __user *arg)
1287 {
1288 unsigned int ifnum;
1289 int ret;
1290
1291 if (get_user(ifnum, (unsigned int __user *)arg))
1292 return -EFAULT;
1293 if ((ret = releaseintf(ps, ifnum)) < 0)
1294 return ret;
1295 destroy_async_on_interface (ps, ifnum);
1296 return 0;
1297 }
1298
1299 static int proc_ioctl(struct dev_state *ps, struct usbdevfs_ioctl *ctl)
1300 {
1301 int size;
1302 void *buf = NULL;
1303 int retval = 0;
1304 struct usb_interface *intf = NULL;
1305 struct usb_driver *driver = NULL;
1306
1307 /* alloc buffer */
1308 if ((size = _IOC_SIZE (ctl->ioctl_code)) > 0) {
1309 if ((buf = kmalloc (size, GFP_KERNEL)) == NULL)
1310 return -ENOMEM;
1311 if ((_IOC_DIR(ctl->ioctl_code) & _IOC_WRITE)) {
1312 if (copy_from_user (buf, ctl->data, size)) {
1313 kfree(buf);
1314 return -EFAULT;
1315 }
1316 } else {
1317 memset (buf, 0, size);
1318 }
1319 }
1320
1321 if (!connected(ps->dev)) {
1322 kfree(buf);
1323 return -ENODEV;
1324 }
1325
1326 if (ps->dev->state != USB_STATE_CONFIGURED)
1327 retval = -EHOSTUNREACH;
1328 else if (!(intf = usb_ifnum_to_if (ps->dev, ctl->ifno)))
1329 retval = -EINVAL;
1330 else switch (ctl->ioctl_code) {
1331
1332 /* disconnect kernel driver from interface */
1333 case USBDEVFS_DISCONNECT:
1334
1335 down_write(&usb_bus_type.subsys.rwsem);
1336 if (intf->dev.driver) {
1337 driver = to_usb_driver(intf->dev.driver);
1338 dev_dbg (&intf->dev, "disconnect by usbfs\n");
1339 usb_driver_release_interface(driver, intf);
1340 } else
1341 retval = -ENODATA;
1342 up_write(&usb_bus_type.subsys.rwsem);
1343 break;
1344
1345 /* let kernel drivers try to (re)bind to the interface */
1346 case USBDEVFS_CONNECT:
1347 usb_unlock_device(ps->dev);
1348 bus_rescan_devices(intf->dev.bus);
1349 usb_lock_device(ps->dev);
1350 break;
1351
1352 /* talk directly to the interface's driver */
1353 default:
1354 down_read(&usb_bus_type.subsys.rwsem);
1355 if (intf->dev.driver)
1356 driver = to_usb_driver(intf->dev.driver);
1357 if (driver == NULL || driver->ioctl == NULL) {
1358 retval = -ENOTTY;
1359 } else {
1360 retval = driver->ioctl (intf, ctl->ioctl_code, buf);
1361 if (retval == -ENOIOCTLCMD)
1362 retval = -ENOTTY;
1363 }
1364 up_read(&usb_bus_type.subsys.rwsem);
1365 }
1366
1367 /* cleanup and return */
1368 if (retval >= 0
1369 && (_IOC_DIR (ctl->ioctl_code) & _IOC_READ) != 0
1370 && size > 0
1371 && copy_to_user (ctl->data, buf, size) != 0)
1372 retval = -EFAULT;
1373
1374 kfree(buf);
1375 return retval;
1376 }
1377
1378 static int proc_ioctl_default(struct dev_state *ps, void __user *arg)
1379 {
1380 struct usbdevfs_ioctl ctrl;
1381
1382 if (copy_from_user(&ctrl, arg, sizeof (ctrl)))
1383 return -EFAULT;
1384 return proc_ioctl(ps, &ctrl);
1385 }
1386
1387 #ifdef CONFIG_COMPAT
1388 static int proc_ioctl_compat(struct dev_state *ps, compat_uptr_t arg)
1389 {
1390 struct usbdevfs_ioctl32 __user *uioc;
1391 struct usbdevfs_ioctl ctrl;
1392 u32 udata;
1393
1394 uioc = compat_ptr((long)arg);
1395 if (get_user(ctrl.ifno, &uioc->ifno) ||
1396 get_user(ctrl.ioctl_code, &uioc->ioctl_code) ||
1397 __get_user(udata, &uioc->data))
1398 return -EFAULT;
1399 ctrl.data = compat_ptr(udata);
1400
1401 return proc_ioctl(ps, &ctrl);
1402 }
1403 #endif
1404
1405 /*
1406 * NOTE: All requests here that have interface numbers as parameters
1407 * are assuming that somehow the configuration has been prevented from
1408 * changing. But there's no mechanism to ensure that...
1409 */
1410 static int usbdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
1411 {
1412 struct dev_state *ps = (struct dev_state *)file->private_data;
1413 struct usb_device *dev = ps->dev;
1414 void __user *p = (void __user *)arg;
1415 int ret = -ENOTTY;
1416
1417 if (!(file->f_mode & FMODE_WRITE))
1418 return -EPERM;
1419 usb_lock_device(dev);
1420 if (!connected(dev)) {
1421 usb_unlock_device(dev);
1422 return -ENODEV;
1423 }
1424
1425 switch (cmd) {
1426 case USBDEVFS_CONTROL:
1427 snoop(&dev->dev, "%s: CONTROL\n", __FUNCTION__);
1428 ret = proc_control(ps, p);
1429 if (ret >= 0)
1430 inode->i_mtime = CURRENT_TIME;
1431 break;
1432
1433 case USBDEVFS_BULK:
1434 snoop(&dev->dev, "%s: BULK\n", __FUNCTION__);
1435 ret = proc_bulk(ps, p);
1436 if (ret >= 0)
1437 inode->i_mtime = CURRENT_TIME;
1438 break;
1439
1440 case USBDEVFS_RESETEP:
1441 snoop(&dev->dev, "%s: RESETEP\n", __FUNCTION__);
1442 ret = proc_resetep(ps, p);
1443 if (ret >= 0)
1444 inode->i_mtime = CURRENT_TIME;
1445 break;
1446
1447 case USBDEVFS_RESET:
1448 snoop(&dev->dev, "%s: RESET\n", __FUNCTION__);
1449 ret = proc_resetdevice(ps);
1450 break;
1451
1452 case USBDEVFS_CLEAR_HALT:
1453 snoop(&dev->dev, "%s: CLEAR_HALT\n", __FUNCTION__);
1454 ret = proc_clearhalt(ps, p);
1455 if (ret >= 0)
1456 inode->i_mtime = CURRENT_TIME;
1457 break;
1458
1459 case USBDEVFS_GETDRIVER:
1460 snoop(&dev->dev, "%s: GETDRIVER\n", __FUNCTION__);
1461 ret = proc_getdriver(ps, p);
1462 break;
1463
1464 case USBDEVFS_CONNECTINFO:
1465 snoop(&dev->dev, "%s: CONNECTINFO\n", __FUNCTION__);
1466 ret = proc_connectinfo(ps, p);
1467 break;
1468
1469 case USBDEVFS_SETINTERFACE:
1470 snoop(&dev->dev, "%s: SETINTERFACE\n", __FUNCTION__);
1471 ret = proc_setintf(ps, p);
1472 break;
1473
1474 case USBDEVFS_SETCONFIGURATION:
1475 snoop(&dev->dev, "%s: SETCONFIGURATION\n", __FUNCTION__);
1476 ret = proc_setconfig(ps, p);
1477 break;
1478
1479 case USBDEVFS_SUBMITURB:
1480 snoop(&dev->dev, "%s: SUBMITURB\n", __FUNCTION__);
1481 ret = proc_submiturb(ps, p);
1482 if (ret >= 0)
1483 inode->i_mtime = CURRENT_TIME;
1484 break;
1485
1486 #ifdef CONFIG_COMPAT
1487
1488 case USBDEVFS_SUBMITURB32:
1489 snoop(&dev->dev, "%s: SUBMITURB32\n", __FUNCTION__);
1490 ret = proc_submiturb_compat(ps, p);
1491 if (ret >= 0)
1492 inode->i_mtime = CURRENT_TIME;
1493 break;
1494
1495 case USBDEVFS_REAPURB32:
1496 snoop(&dev->dev, "%s: REAPURB32\n", __FUNCTION__);
1497 ret = proc_reapurb_compat(ps, p);
1498 break;
1499
1500 case USBDEVFS_REAPURBNDELAY32:
1501 snoop(&dev->dev, "%s: REAPURBDELAY32\n", __FUNCTION__);
1502 ret = proc_reapurbnonblock_compat(ps, p);
1503 break;
1504
1505 case USBDEVFS_IOCTL32:
1506 snoop(&dev->dev, "%s: IOCTL\n", __FUNCTION__);
1507 ret = proc_ioctl_compat(ps, (compat_uptr_t)(long)p);
1508 break;
1509 #endif
1510
1511 case USBDEVFS_DISCARDURB:
1512 snoop(&dev->dev, "%s: DISCARDURB\n", __FUNCTION__);
1513 ret = proc_unlinkurb(ps, p);
1514 break;
1515
1516 case USBDEVFS_REAPURB:
1517 snoop(&dev->dev, "%s: REAPURB\n", __FUNCTION__);
1518 ret = proc_reapurb(ps, p);
1519 break;
1520
1521 case USBDEVFS_REAPURBNDELAY:
1522 snoop(&dev->dev, "%s: REAPURBDELAY\n", __FUNCTION__);
1523 ret = proc_reapurbnonblock(ps, p);
1524 break;
1525
1526 case USBDEVFS_DISCSIGNAL:
1527 snoop(&dev->dev, "%s: DISCSIGNAL\n", __FUNCTION__);
1528 ret = proc_disconnectsignal(ps, p);
1529 break;
1530
1531 case USBDEVFS_CLAIMINTERFACE:
1532 snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __FUNCTION__);
1533 ret = proc_claiminterface(ps, p);
1534 break;
1535
1536 case USBDEVFS_RELEASEINTERFACE:
1537 snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __FUNCTION__);
1538 ret = proc_releaseinterface(ps, p);
1539 break;
1540
1541 case USBDEVFS_IOCTL:
1542 snoop(&dev->dev, "%s: IOCTL\n", __FUNCTION__);
1543 ret = proc_ioctl_default(ps, p);
1544 break;
1545 }
1546 usb_unlock_device(dev);
1547 if (ret >= 0)
1548 inode->i_atime = CURRENT_TIME;
1549 return ret;
1550 }
1551
1552 /* No kernel lock - fine */
1553 static unsigned int usbdev_poll(struct file *file, struct poll_table_struct *wait)
1554 {
1555 struct dev_state *ps = (struct dev_state *)file->private_data;
1556 unsigned int mask = 0;
1557
1558 poll_wait(file, &ps->wait, wait);
1559 if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed))
1560 mask |= POLLOUT | POLLWRNORM;
1561 if (!connected(ps->dev))
1562 mask |= POLLERR | POLLHUP;
1563 return mask;
1564 }
1565
1566 struct file_operations usbfs_device_file_operations = {
1567 .llseek = usbdev_lseek,
1568 .read = usbdev_read,
1569 .poll = usbdev_poll,
1570 .ioctl = usbdev_ioctl,
1571 .open = usbdev_open,
1572 .release = usbdev_release,
1573 };
1574
1575 static void usbdev_add(struct usb_device *dev)
1576 {
1577 int minor = ((dev->bus->busnum-1) * 128) + (dev->devnum-1);
1578
1579 dev->class_dev = class_device_create(usb_device_class, NULL,
1580 MKDEV(USB_DEVICE_MAJOR, minor), &dev->dev,
1581 "usbdev%d.%d", dev->bus->busnum, dev->devnum);
1582
1583 dev->class_dev->class_data = dev;
1584 }
1585
1586 static void usbdev_remove(struct usb_device *dev)
1587 {
1588 class_device_unregister(dev->class_dev);
1589 }
1590
1591 static int usbdev_notify(struct notifier_block *self, unsigned long action,
1592 void *dev)
1593 {
1594 switch (action) {
1595 case USB_DEVICE_ADD:
1596 usbdev_add(dev);
1597 break;
1598 case USB_DEVICE_REMOVE:
1599 usbdev_remove(dev);
1600 break;
1601 }
1602 return NOTIFY_OK;
1603 }
1604
1605 static struct notifier_block usbdev_nb = {
1606 .notifier_call = usbdev_notify,
1607 };
1608
1609 static struct cdev usb_device_cdev = {
1610 .kobj = {.name = "usb_device", },
1611 .owner = THIS_MODULE,
1612 };
1613
1614 int __init usbdev_init(void)
1615 {
1616 int retval;
1617
1618 retval = register_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX,
1619 "usb_device");
1620 if (retval) {
1621 err("unable to register minors for usb_device");
1622 goto out;
1623 }
1624 cdev_init(&usb_device_cdev, &usbfs_device_file_operations);
1625 retval = cdev_add(&usb_device_cdev, USB_DEVICE_DEV, USB_DEVICE_MAX);
1626 if (retval) {
1627 err("unable to get usb_device major %d", USB_DEVICE_MAJOR);
1628 goto error_cdev;
1629 }
1630 usb_device_class = class_create(THIS_MODULE, "usb_device");
1631 if (IS_ERR(usb_device_class)) {
1632 err("unable to register usb_device class");
1633 retval = PTR_ERR(usb_device_class);
1634 goto error_class;
1635 }
1636
1637 usb_register_notify(&usbdev_nb);
1638
1639 out:
1640 return retval;
1641
1642 error_class:
1643 usb_device_class = NULL;
1644 cdev_del(&usb_device_cdev);
1645
1646 error_cdev:
1647 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
1648 goto out;
1649 }
1650
1651 void usbdev_cleanup(void)
1652 {
1653 usb_unregister_notify(&usbdev_nb);
1654 class_destroy(usb_device_class);
1655 cdev_del(&usb_device_cdev);
1656 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
1657 }
1658
Stable & featurefull patchset based on Linus's git branch