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[PATCH] Driver Core: fix up all callers of class_device_create()
[deliverable/linux.git] / drivers / usb / core / devio.c
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 <asm/uaccess.h>
50 #include <asm/byteorder.h>
51 #include <linux/moduleparam.h>
52
53 #include "hcd.h" /* for usbcore internals */
54 #include "usb.h"
55
56 #define USB_MAXBUS 64
57 #define USB_DEVICE_MAX USB_MAXBUS * 128
58 static struct class *usb_device_class;
59
60 struct async {
61 struct list_head asynclist;
62 struct dev_state *ps;
63 pid_t pid;
64 uid_t uid, euid;
65 unsigned int signr;
66 unsigned int ifnum;
67 void __user *userbuffer;
68 void __user *userurb;
69 struct urb *urb;
70 };
71
72 static int usbfs_snoop = 0;
73 module_param (usbfs_snoop, bool, S_IRUGO | S_IWUSR);
74 MODULE_PARM_DESC (usbfs_snoop, "true to log all usbfs traffic");
75
76 #define snoop(dev, format, arg...) \
77 do { \
78 if (usbfs_snoop) \
79 dev_info( dev , format , ## arg); \
80 } while (0)
81
82 #define USB_DEVICE_DEV MKDEV(USB_DEVICE_MAJOR, 0)
83
84
85 #define MAX_USBFS_BUFFER_SIZE 16384
86
87 static inline int connected (struct usb_device *dev)
88 {
89 return dev->state != USB_STATE_NOTATTACHED;
90 }
91
92 static loff_t usbdev_lseek(struct file *file, loff_t offset, int orig)
93 {
94 loff_t ret;
95
96 lock_kernel();
97
98 switch (orig) {
99 case 0:
100 file->f_pos = offset;
101 ret = file->f_pos;
102 break;
103 case 1:
104 file->f_pos += offset;
105 ret = file->f_pos;
106 break;
107 case 2:
108 default:
109 ret = -EINVAL;
110 }
111
112 unlock_kernel();
113 return ret;
114 }
115
116 static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos)
117 {
118 struct dev_state *ps = (struct dev_state *)file->private_data;
119 struct usb_device *dev = ps->dev;
120 ssize_t ret = 0;
121 unsigned len;
122 loff_t pos;
123 int i;
124
125 pos = *ppos;
126 usb_lock_device(dev);
127 if (!connected(dev)) {
128 ret = -ENODEV;
129 goto err;
130 } else if (pos < 0) {
131 ret = -EINVAL;
132 goto err;
133 }
134
135 if (pos < sizeof(struct usb_device_descriptor)) {
136 struct usb_device_descriptor *desc = kmalloc(sizeof(*desc), GFP_KERNEL);
137 if (!desc) {
138 ret = -ENOMEM;
139 goto err;
140 }
141 memcpy(desc, &dev->descriptor, sizeof(dev->descriptor));
142 le16_to_cpus(&desc->bcdUSB);
143 le16_to_cpus(&desc->idVendor);
144 le16_to_cpus(&desc->idProduct);
145 le16_to_cpus(&desc->bcdDevice);
146
147 len = sizeof(struct usb_device_descriptor) - pos;
148 if (len > nbytes)
149 len = nbytes;
150 if (copy_to_user(buf, ((char *)desc) + pos, len)) {
151 kfree(desc);
152 ret = -EFAULT;
153 goto err;
154 }
155 kfree(desc);
156
157 *ppos += len;
158 buf += len;
159 nbytes -= len;
160 ret += len;
161 }
162
163 pos = sizeof(struct usb_device_descriptor);
164 for (i = 0; nbytes && i < dev->descriptor.bNumConfigurations; i++) {
165 struct usb_config_descriptor *config =
166 (struct usb_config_descriptor *)dev->rawdescriptors[i];
167 unsigned int length = le16_to_cpu(config->wTotalLength);
168
169 if (*ppos < pos + length) {
170
171 /* The descriptor may claim to be longer than it
172 * really is. Here is the actual allocated length. */
173 unsigned alloclen =
174 le16_to_cpu(dev->config[i].desc.wTotalLength);
175
176 len = length - (*ppos - pos);
177 if (len > nbytes)
178 len = nbytes;
179
180 /* Simply don't write (skip over) unallocated parts */
181 if (alloclen > (*ppos - pos)) {
182 alloclen -= (*ppos - pos);
183 if (copy_to_user(buf,
184 dev->rawdescriptors[i] + (*ppos - pos),
185 min(len, alloclen))) {
186 ret = -EFAULT;
187 goto err;
188 }
189 }
190
191 *ppos += len;
192 buf += len;
193 nbytes -= len;
194 ret += len;
195 }
196
197 pos += length;
198 }
199
200 err:
201 usb_unlock_device(dev);
202 return ret;
203 }
204
205 /*
206 * async list handling
207 */
208
209 static struct async *alloc_async(unsigned int numisoframes)
210 {
211 unsigned int assize = sizeof(struct async) + numisoframes * sizeof(struct usb_iso_packet_descriptor);
212 struct async *as = kmalloc(assize, GFP_KERNEL);
213 if (!as)
214 return NULL;
215 memset(as, 0, assize);
216 as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL);
217 if (!as->urb) {
218 kfree(as);
219 return NULL;
220 }
221 return as;
222 }
223
224 static void free_async(struct async *as)
225 {
226 kfree(as->urb->transfer_buffer);
227 kfree(as->urb->setup_packet);
228 usb_free_urb(as->urb);
229 kfree(as);
230 }
231
232 static inline void async_newpending(struct async *as)
233 {
234 struct dev_state *ps = as->ps;
235 unsigned long flags;
236
237 spin_lock_irqsave(&ps->lock, flags);
238 list_add_tail(&as->asynclist, &ps->async_pending);
239 spin_unlock_irqrestore(&ps->lock, flags);
240 }
241
242 static inline void async_removepending(struct async *as)
243 {
244 struct dev_state *ps = as->ps;
245 unsigned long flags;
246
247 spin_lock_irqsave(&ps->lock, flags);
248 list_del_init(&as->asynclist);
249 spin_unlock_irqrestore(&ps->lock, flags);
250 }
251
252 static inline struct async *async_getcompleted(struct dev_state *ps)
253 {
254 unsigned long flags;
255 struct async *as = NULL;
256
257 spin_lock_irqsave(&ps->lock, flags);
258 if (!list_empty(&ps->async_completed)) {
259 as = list_entry(ps->async_completed.next, struct async, asynclist);
260 list_del_init(&as->asynclist);
261 }
262 spin_unlock_irqrestore(&ps->lock, flags);
263 return as;
264 }
265
266 static inline struct async *async_getpending(struct dev_state *ps, void __user *userurb)
267 {
268 unsigned long flags;
269 struct async *as;
270
271 spin_lock_irqsave(&ps->lock, flags);
272 list_for_each_entry(as, &ps->async_pending, asynclist)
273 if (as->userurb == userurb) {
274 list_del_init(&as->asynclist);
275 spin_unlock_irqrestore(&ps->lock, flags);
276 return as;
277 }
278 spin_unlock_irqrestore(&ps->lock, flags);
279 return NULL;
280 }
281
282 static void async_completed(struct urb *urb, struct pt_regs *regs)
283 {
284 struct async *as = (struct async *)urb->context;
285 struct dev_state *ps = as->ps;
286 struct siginfo sinfo;
287
288 spin_lock(&ps->lock);
289 list_move_tail(&as->asynclist, &ps->async_completed);
290 spin_unlock(&ps->lock);
291 if (as->signr) {
292 sinfo.si_signo = as->signr;
293 sinfo.si_errno = as->urb->status;
294 sinfo.si_code = SI_ASYNCIO;
295 sinfo.si_addr = as->userurb;
296 kill_proc_info_as_uid(as->signr, &sinfo, as->pid, as->uid,
297 as->euid);
298 }
299 wake_up(&ps->wait);
300 }
301
302 static void destroy_async (struct dev_state *ps, struct list_head *list)
303 {
304 struct async *as;
305 unsigned long flags;
306
307 spin_lock_irqsave(&ps->lock, flags);
308 while (!list_empty(list)) {
309 as = list_entry(list->next, struct async, asynclist);
310 list_del_init(&as->asynclist);
311
312 /* drop the spinlock so the completion handler can run */
313 spin_unlock_irqrestore(&ps->lock, flags);
314 usb_kill_urb(as->urb);
315 spin_lock_irqsave(&ps->lock, flags);
316 }
317 spin_unlock_irqrestore(&ps->lock, flags);
318 as = async_getcompleted(ps);
319 while (as) {
320 free_async(as);
321 as = async_getcompleted(ps);
322 }
323 }
324
325 static void destroy_async_on_interface (struct dev_state *ps, unsigned int ifnum)
326 {
327 struct list_head *p, *q, hitlist;
328 unsigned long flags;
329
330 INIT_LIST_HEAD(&hitlist);
331 spin_lock_irqsave(&ps->lock, flags);
332 list_for_each_safe(p, q, &ps->async_pending)
333 if (ifnum == list_entry(p, struct async, asynclist)->ifnum)
334 list_move_tail(p, &hitlist);
335 spin_unlock_irqrestore(&ps->lock, flags);
336 destroy_async(ps, &hitlist);
337 }
338
339 static inline void destroy_all_async(struct dev_state *ps)
340 {
341 destroy_async(ps, &ps->async_pending);
342 }
343
344 /*
345 * interface claims are made only at the request of user level code,
346 * which can also release them (explicitly or by closing files).
347 * they're also undone when devices disconnect.
348 */
349
350 static int driver_probe (struct usb_interface *intf,
351 const struct usb_device_id *id)
352 {
353 return -ENODEV;
354 }
355
356 static void driver_disconnect(struct usb_interface *intf)
357 {
358 struct dev_state *ps = usb_get_intfdata (intf);
359 unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber;
360
361 if (!ps)
362 return;
363
364 /* NOTE: this relies on usbcore having canceled and completed
365 * all pending I/O requests; 2.6 does that.
366 */
367
368 if (likely(ifnum < 8*sizeof(ps->ifclaimed)))
369 clear_bit(ifnum, &ps->ifclaimed);
370 else
371 warn("interface number %u out of range", ifnum);
372
373 usb_set_intfdata (intf, NULL);
374
375 /* force async requests to complete */
376 destroy_async_on_interface(ps, ifnum);
377 }
378
379 struct usb_driver usbfs_driver = {
380 .owner = THIS_MODULE,
381 .name = "usbfs",
382 .probe = driver_probe,
383 .disconnect = driver_disconnect,
384 };
385
386 static int claimintf(struct dev_state *ps, unsigned int ifnum)
387 {
388 struct usb_device *dev = ps->dev;
389 struct usb_interface *intf;
390 int err;
391
392 if (ifnum >= 8*sizeof(ps->ifclaimed))
393 return -EINVAL;
394 /* already claimed */
395 if (test_bit(ifnum, &ps->ifclaimed))
396 return 0;
397
398 /* lock against other changes to driver bindings */
399 down_write(&usb_bus_type.subsys.rwsem);
400 intf = usb_ifnum_to_if(dev, ifnum);
401 if (!intf)
402 err = -ENOENT;
403 else
404 err = usb_driver_claim_interface(&usbfs_driver, intf, ps);
405 up_write(&usb_bus_type.subsys.rwsem);
406 if (err == 0)
407 set_bit(ifnum, &ps->ifclaimed);
408 return err;
409 }
410
411 static int releaseintf(struct dev_state *ps, unsigned int ifnum)
412 {
413 struct usb_device *dev;
414 struct usb_interface *intf;
415 int err;
416
417 err = -EINVAL;
418 if (ifnum >= 8*sizeof(ps->ifclaimed))
419 return err;
420 dev = ps->dev;
421 /* lock against other changes to driver bindings */
422 down_write(&usb_bus_type.subsys.rwsem);
423 intf = usb_ifnum_to_if(dev, ifnum);
424 if (!intf)
425 err = -ENOENT;
426 else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) {
427 usb_driver_release_interface(&usbfs_driver, intf);
428 err = 0;
429 }
430 up_write(&usb_bus_type.subsys.rwsem);
431 return err;
432 }
433
434 static int checkintf(struct dev_state *ps, unsigned int ifnum)
435 {
436 if (ps->dev->state != USB_STATE_CONFIGURED)
437 return -EHOSTUNREACH;
438 if (ifnum >= 8*sizeof(ps->ifclaimed))
439 return -EINVAL;
440 if (test_bit(ifnum, &ps->ifclaimed))
441 return 0;
442 /* if not yet claimed, claim it for the driver */
443 dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim interface %u before use\n",
444 current->pid, current->comm, ifnum);
445 return claimintf(ps, ifnum);
446 }
447
448 static int findintfep(struct usb_device *dev, unsigned int ep)
449 {
450 unsigned int i, j, e;
451 struct usb_interface *intf;
452 struct usb_host_interface *alts;
453 struct usb_endpoint_descriptor *endpt;
454
455 if (ep & ~(USB_DIR_IN|0xf))
456 return -EINVAL;
457 if (!dev->actconfig)
458 return -ESRCH;
459 for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) {
460 intf = dev->actconfig->interface[i];
461 for (j = 0; j < intf->num_altsetting; j++) {
462 alts = &intf->altsetting[j];
463 for (e = 0; e < alts->desc.bNumEndpoints; e++) {
464 endpt = &alts->endpoint[e].desc;
465 if (endpt->bEndpointAddress == ep)
466 return alts->desc.bInterfaceNumber;
467 }
468 }
469 }
470 return -ENOENT;
471 }
472
473 static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype, unsigned int index)
474 {
475 int ret = 0;
476
477 if (ps->dev->state != USB_STATE_CONFIGURED)
478 return -EHOSTUNREACH;
479 if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype))
480 return 0;
481
482 index &= 0xff;
483 switch (requesttype & USB_RECIP_MASK) {
484 case USB_RECIP_ENDPOINT:
485 if ((ret = findintfep(ps->dev, index)) >= 0)
486 ret = checkintf(ps, ret);
487 break;
488
489 case USB_RECIP_INTERFACE:
490 ret = checkintf(ps, index);
491 break;
492 }
493 return ret;
494 }
495
496 /*
497 * file operations
498 */
499 static int usbdev_open(struct inode *inode, struct file *file)
500 {
501 struct usb_device *dev = NULL;
502 struct dev_state *ps;
503 int ret;
504
505 /*
506 * no locking necessary here, as chrdev_open has the kernel lock
507 * (still acquire the kernel lock for safety)
508 */
509 ret = -ENOMEM;
510 if (!(ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL)))
511 goto out_nolock;
512
513 lock_kernel();
514 ret = -ENOENT;
515 /* check if we are called from a real node or usbfs */
516 if (imajor(inode) == USB_DEVICE_MAJOR)
517 dev = usbdev_lookup_minor(iminor(inode));
518 if (!dev)
519 dev = inode->u.generic_ip;
520 if (!dev) {
521 kfree(ps);
522 goto out;
523 }
524 usb_get_dev(dev);
525 ret = 0;
526 ps->dev = dev;
527 ps->file = file;
528 spin_lock_init(&ps->lock);
529 INIT_LIST_HEAD(&ps->async_pending);
530 INIT_LIST_HEAD(&ps->async_completed);
531 init_waitqueue_head(&ps->wait);
532 ps->discsignr = 0;
533 ps->disc_pid = current->pid;
534 ps->disc_uid = current->uid;
535 ps->disc_euid = current->euid;
536 ps->disccontext = NULL;
537 ps->ifclaimed = 0;
538 wmb();
539 list_add_tail(&ps->list, &dev->filelist);
540 file->private_data = ps;
541 out:
542 unlock_kernel();
543 out_nolock:
544 return ret;
545 }
546
547 static int usbdev_release(struct inode *inode, struct file *file)
548 {
549 struct dev_state *ps = (struct dev_state *)file->private_data;
550 struct usb_device *dev = ps->dev;
551 unsigned int ifnum;
552
553 usb_lock_device(dev);
554 list_del_init(&ps->list);
555 for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed);
556 ifnum++) {
557 if (test_bit(ifnum, &ps->ifclaimed))
558 releaseintf(ps, ifnum);
559 }
560 destroy_all_async(ps);
561 usb_unlock_device(dev);
562 usb_put_dev(dev);
563 ps->dev = NULL;
564 kfree(ps);
565 return 0;
566 }
567
568 static int proc_control(struct dev_state *ps, void __user *arg)
569 {
570 struct usb_device *dev = ps->dev;
571 struct usbdevfs_ctrltransfer ctrl;
572 unsigned int tmo;
573 unsigned char *tbuf;
574 int i, j, ret;
575
576 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
577 return -EFAULT;
578 if ((ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.wIndex)))
579 return ret;
580 if (ctrl.wLength > PAGE_SIZE)
581 return -EINVAL;
582 if (!(tbuf = (unsigned char *)__get_free_page(GFP_KERNEL)))
583 return -ENOMEM;
584 tmo = ctrl.timeout;
585 if (ctrl.bRequestType & 0x80) {
586 if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data, ctrl.wLength)) {
587 free_page((unsigned long)tbuf);
588 return -EINVAL;
589 }
590 snoop(&dev->dev, "control read: bRequest=%02x "
591 "bRrequestType=%02x wValue=%04x "
592 "wIndex=%04x wLength=%04x\n",
593 ctrl.bRequest, ctrl.bRequestType, ctrl.wValue,
594 ctrl.wIndex, ctrl.wLength);
595
596 usb_unlock_device(dev);
597 i = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType,
598 ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo);
599 usb_lock_device(dev);
600 if ((i > 0) && ctrl.wLength) {
601 if (usbfs_snoop) {
602 dev_info(&dev->dev, "control read: data ");
603 for (j = 0; j < i; ++j)
604 printk ("%02x ", (unsigned char)(tbuf)[j]);
605 printk("\n");
606 }
607 if (copy_to_user(ctrl.data, tbuf, i)) {
608 free_page((unsigned long)tbuf);
609 return -EFAULT;
610 }
611 }
612 } else {
613 if (ctrl.wLength) {
614 if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) {
615 free_page((unsigned long)tbuf);
616 return -EFAULT;
617 }
618 }
619 snoop(&dev->dev, "control write: bRequest=%02x "
620 "bRrequestType=%02x wValue=%04x "
621 "wIndex=%04x wLength=%04x\n",
622 ctrl.bRequest, ctrl.bRequestType, ctrl.wValue,
623 ctrl.wIndex, ctrl.wLength);
624 if (usbfs_snoop) {
625 dev_info(&dev->dev, "control write: data: ");
626 for (j = 0; j < ctrl.wLength; ++j)
627 printk ("%02x ", (unsigned char)(tbuf)[j]);
628 printk("\n");
629 }
630 usb_unlock_device(dev);
631 i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType,
632 ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo);
633 usb_lock_device(dev);
634 }
635 free_page((unsigned long)tbuf);
636 if (i<0 && i != -EPIPE) {
637 dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL "
638 "failed cmd %s rqt %u rq %u len %u ret %d\n",
639 current->comm, ctrl.bRequestType, ctrl.bRequest,
640 ctrl.wLength, i);
641 }
642 return i;
643 }
644
645 static int proc_bulk(struct dev_state *ps, void __user *arg)
646 {
647 struct usb_device *dev = ps->dev;
648 struct usbdevfs_bulktransfer bulk;
649 unsigned int tmo, len1, pipe;
650 int len2;
651 unsigned char *tbuf;
652 int i, ret;
653
654 if (copy_from_user(&bulk, arg, sizeof(bulk)))
655 return -EFAULT;
656 if ((ret = findintfep(ps->dev, bulk.ep)) < 0)
657 return ret;
658 if ((ret = checkintf(ps, ret)))
659 return ret;
660 if (bulk.ep & USB_DIR_IN)
661 pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f);
662 else
663 pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f);
664 if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN)))
665 return -EINVAL;
666 len1 = bulk.len;
667 if (len1 > MAX_USBFS_BUFFER_SIZE)
668 return -EINVAL;
669 if (!(tbuf = kmalloc(len1, GFP_KERNEL)))
670 return -ENOMEM;
671 tmo = bulk.timeout;
672 if (bulk.ep & 0x80) {
673 if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) {
674 kfree(tbuf);
675 return -EINVAL;
676 }
677 usb_unlock_device(dev);
678 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
679 usb_lock_device(dev);
680 if (!i && len2) {
681 if (copy_to_user(bulk.data, tbuf, len2)) {
682 kfree(tbuf);
683 return -EFAULT;
684 }
685 }
686 } else {
687 if (len1) {
688 if (copy_from_user(tbuf, bulk.data, len1)) {
689 kfree(tbuf);
690 return -EFAULT;
691 }
692 }
693 usb_unlock_device(dev);
694 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
695 usb_lock_device(dev);
696 }
697 kfree(tbuf);
698 if (i < 0)
699 return i;
700 return len2;
701 }
702
703 static int proc_resetep(struct dev_state *ps, void __user *arg)
704 {
705 unsigned int ep;
706 int ret;
707
708 if (get_user(ep, (unsigned int __user *)arg))
709 return -EFAULT;
710 if ((ret = findintfep(ps->dev, ep)) < 0)
711 return ret;
712 if ((ret = checkintf(ps, ret)))
713 return ret;
714 usb_settoggle(ps->dev, ep & 0xf, !(ep & USB_DIR_IN), 0);
715 return 0;
716 }
717
718 static int proc_clearhalt(struct dev_state *ps, void __user *arg)
719 {
720 unsigned int ep;
721 int pipe;
722 int ret;
723
724 if (get_user(ep, (unsigned int __user *)arg))
725 return -EFAULT;
726 if ((ret = findintfep(ps->dev, ep)) < 0)
727 return ret;
728 if ((ret = checkintf(ps, ret)))
729 return ret;
730 if (ep & USB_DIR_IN)
731 pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f);
732 else
733 pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f);
734
735 return usb_clear_halt(ps->dev, pipe);
736 }
737
738
739 static int proc_getdriver(struct dev_state *ps, void __user *arg)
740 {
741 struct usbdevfs_getdriver gd;
742 struct usb_interface *intf;
743 int ret;
744
745 if (copy_from_user(&gd, arg, sizeof(gd)))
746 return -EFAULT;
747 down_read(&usb_bus_type.subsys.rwsem);
748 intf = usb_ifnum_to_if(ps->dev, gd.interface);
749 if (!intf || !intf->dev.driver)
750 ret = -ENODATA;
751 else {
752 strncpy(gd.driver, intf->dev.driver->name,
753 sizeof(gd.driver));
754 ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0);
755 }
756 up_read(&usb_bus_type.subsys.rwsem);
757 return ret;
758 }
759
760 static int proc_connectinfo(struct dev_state *ps, void __user *arg)
761 {
762 struct usbdevfs_connectinfo ci;
763
764 ci.devnum = ps->dev->devnum;
765 ci.slow = ps->dev->speed == USB_SPEED_LOW;
766 if (copy_to_user(arg, &ci, sizeof(ci)))
767 return -EFAULT;
768 return 0;
769 }
770
771 static int proc_resetdevice(struct dev_state *ps)
772 {
773 return usb_reset_device(ps->dev);
774
775 }
776
777 static int proc_setintf(struct dev_state *ps, void __user *arg)
778 {
779 struct usbdevfs_setinterface setintf;
780 int ret;
781
782 if (copy_from_user(&setintf, arg, sizeof(setintf)))
783 return -EFAULT;
784 if ((ret = checkintf(ps, setintf.interface)))
785 return ret;
786 return usb_set_interface(ps->dev, setintf.interface,
787 setintf.altsetting);
788 }
789
790 static int proc_setconfig(struct dev_state *ps, void __user *arg)
791 {
792 unsigned int u;
793 int status = 0;
794 struct usb_host_config *actconfig;
795
796 if (get_user(u, (unsigned int __user *)arg))
797 return -EFAULT;
798
799 actconfig = ps->dev->actconfig;
800
801 /* Don't touch the device if any interfaces are claimed.
802 * It could interfere with other drivers' operations, and if
803 * an interface is claimed by usbfs it could easily deadlock.
804 */
805 if (actconfig) {
806 int i;
807
808 for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) {
809 if (usb_interface_claimed(actconfig->interface[i])) {
810 dev_warn (&ps->dev->dev,
811 "usbfs: interface %d claimed by %s "
812 "while '%s' sets config #%d\n",
813 actconfig->interface[i]
814 ->cur_altsetting
815 ->desc.bInterfaceNumber,
816 actconfig->interface[i]
817 ->dev.driver->name,
818 current->comm, u);
819 status = -EBUSY;
820 break;
821 }
822 }
823 }
824
825 /* SET_CONFIGURATION is often abused as a "cheap" driver reset,
826 * so avoid usb_set_configuration()'s kick to sysfs
827 */
828 if (status == 0) {
829 if (actconfig && actconfig->desc.bConfigurationValue == u)
830 status = usb_reset_configuration(ps->dev);
831 else
832 status = usb_set_configuration(ps->dev, u);
833 }
834
835 return status;
836 }
837
838
839 static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
840 struct usbdevfs_iso_packet_desc __user *iso_frame_desc,
841 void __user *arg)
842 {
843 struct usbdevfs_iso_packet_desc *isopkt = NULL;
844 struct usb_host_endpoint *ep;
845 struct async *as;
846 struct usb_ctrlrequest *dr = NULL;
847 unsigned int u, totlen, isofrmlen;
848 int ret, interval = 0, ifnum = -1;
849
850 if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP|USBDEVFS_URB_SHORT_NOT_OK|
851 URB_NO_FSBR|URB_ZERO_PACKET))
852 return -EINVAL;
853 if (!uurb->buffer)
854 return -EINVAL;
855 if (uurb->signr != 0 && (uurb->signr < SIGRTMIN || uurb->signr > SIGRTMAX))
856 return -EINVAL;
857 if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL && (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) {
858 if ((ifnum = findintfep(ps->dev, uurb->endpoint)) < 0)
859 return ifnum;
860 if ((ret = checkintf(ps, ifnum)))
861 return ret;
862 }
863 if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0)
864 ep = ps->dev->ep_in [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
865 else
866 ep = ps->dev->ep_out [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
867 if (!ep)
868 return -ENOENT;
869 switch(uurb->type) {
870 case USBDEVFS_URB_TYPE_CONTROL:
871 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
872 != USB_ENDPOINT_XFER_CONTROL)
873 return -EINVAL;
874 /* min 8 byte setup packet, max arbitrary */
875 if (uurb->buffer_length < 8 || uurb->buffer_length > PAGE_SIZE)
876 return -EINVAL;
877 if (!(dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL)))
878 return -ENOMEM;
879 if (copy_from_user(dr, uurb->buffer, 8)) {
880 kfree(dr);
881 return -EFAULT;
882 }
883 if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) {
884 kfree(dr);
885 return -EINVAL;
886 }
887 if ((ret = check_ctrlrecip(ps, dr->bRequestType, le16_to_cpup(&dr->wIndex)))) {
888 kfree(dr);
889 return ret;
890 }
891 uurb->endpoint = (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) | (dr->bRequestType & USB_ENDPOINT_DIR_MASK);
892 uurb->number_of_packets = 0;
893 uurb->buffer_length = le16_to_cpup(&dr->wLength);
894 uurb->buffer += 8;
895 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) {
896 kfree(dr);
897 return -EFAULT;
898 }
899 break;
900
901 case USBDEVFS_URB_TYPE_BULK:
902 switch (ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
903 case USB_ENDPOINT_XFER_CONTROL:
904 case USB_ENDPOINT_XFER_ISOC:
905 return -EINVAL;
906 /* allow single-shot interrupt transfers, at bogus rates */
907 }
908 uurb->number_of_packets = 0;
909 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE)
910 return -EINVAL;
911 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length))
912 return -EFAULT;
913 break;
914
915 case USBDEVFS_URB_TYPE_ISO:
916 /* arbitrary limit */
917 if (uurb->number_of_packets < 1 || uurb->number_of_packets > 128)
918 return -EINVAL;
919 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
920 != USB_ENDPOINT_XFER_ISOC)
921 return -EINVAL;
922 interval = 1 << min (15, ep->desc.bInterval - 1);
923 isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * uurb->number_of_packets;
924 if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL)))
925 return -ENOMEM;
926 if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) {
927 kfree(isopkt);
928 return -EFAULT;
929 }
930 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
931 if (isopkt[u].length > 1023) {
932 kfree(isopkt);
933 return -EINVAL;
934 }
935 totlen += isopkt[u].length;
936 }
937 if (totlen > 32768) {
938 kfree(isopkt);
939 return -EINVAL;
940 }
941 uurb->buffer_length = totlen;
942 break;
943
944 case USBDEVFS_URB_TYPE_INTERRUPT:
945 uurb->number_of_packets = 0;
946 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
947 != USB_ENDPOINT_XFER_INT)
948 return -EINVAL;
949 if (ps->dev->speed == USB_SPEED_HIGH)
950 interval = 1 << min (15, ep->desc.bInterval - 1);
951 else
952 interval = ep->desc.bInterval;
953 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE)
954 return -EINVAL;
955 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length))
956 return -EFAULT;
957 break;
958
959 default:
960 return -EINVAL;
961 }
962 if (!(as = alloc_async(uurb->number_of_packets))) {
963 kfree(isopkt);
964 kfree(dr);
965 return -ENOMEM;
966 }
967 if (!(as->urb->transfer_buffer = kmalloc(uurb->buffer_length, GFP_KERNEL))) {
968 kfree(isopkt);
969 kfree(dr);
970 free_async(as);
971 return -ENOMEM;
972 }
973 as->urb->dev = ps->dev;
974 as->urb->pipe = (uurb->type << 30) | __create_pipe(ps->dev, uurb->endpoint & 0xf) | (uurb->endpoint & USB_DIR_IN);
975 as->urb->transfer_flags = uurb->flags;
976 as->urb->transfer_buffer_length = uurb->buffer_length;
977 as->urb->setup_packet = (unsigned char*)dr;
978 as->urb->start_frame = uurb->start_frame;
979 as->urb->number_of_packets = uurb->number_of_packets;
980 as->urb->interval = interval;
981 as->urb->context = as;
982 as->urb->complete = async_completed;
983 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
984 as->urb->iso_frame_desc[u].offset = totlen;
985 as->urb->iso_frame_desc[u].length = isopkt[u].length;
986 totlen += isopkt[u].length;
987 }
988 kfree(isopkt);
989 as->ps = ps;
990 as->userurb = arg;
991 if (uurb->endpoint & USB_DIR_IN)
992 as->userbuffer = uurb->buffer;
993 else
994 as->userbuffer = NULL;
995 as->signr = uurb->signr;
996 as->ifnum = ifnum;
997 as->pid = current->pid;
998 as->uid = current->uid;
999 as->euid = current->euid;
1000 if (!(uurb->endpoint & USB_DIR_IN)) {
1001 if (copy_from_user(as->urb->transfer_buffer, uurb->buffer, as->urb->transfer_buffer_length)) {
1002 free_async(as);
1003 return -EFAULT;
1004 }
1005 }
1006 async_newpending(as);
1007 if ((ret = usb_submit_urb(as->urb, GFP_KERNEL))) {
1008 dev_printk(KERN_DEBUG, &ps->dev->dev, "usbfs: usb_submit_urb returned %d\n", ret);
1009 async_removepending(as);
1010 free_async(as);
1011 return ret;
1012 }
1013 return 0;
1014 }
1015
1016 static int proc_submiturb(struct dev_state *ps, void __user *arg)
1017 {
1018 struct usbdevfs_urb uurb;
1019
1020 if (copy_from_user(&uurb, arg, sizeof(uurb)))
1021 return -EFAULT;
1022
1023 return proc_do_submiturb(ps, &uurb, (((struct usbdevfs_urb __user *)arg)->iso_frame_desc), arg);
1024 }
1025
1026 static int proc_unlinkurb(struct dev_state *ps, void __user *arg)
1027 {
1028 struct async *as;
1029
1030 as = async_getpending(ps, arg);
1031 if (!as)
1032 return -EINVAL;
1033 usb_kill_urb(as->urb);
1034 return 0;
1035 }
1036
1037 static int processcompl(struct async *as, void __user * __user *arg)
1038 {
1039 struct urb *urb = as->urb;
1040 struct usbdevfs_urb __user *userurb = as->userurb;
1041 void __user *addr = as->userurb;
1042 unsigned int i;
1043
1044 if (as->userbuffer)
1045 if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length))
1046 return -EFAULT;
1047 if (put_user(urb->status, &userurb->status))
1048 return -EFAULT;
1049 if (put_user(urb->actual_length, &userurb->actual_length))
1050 return -EFAULT;
1051 if (put_user(urb->error_count, &userurb->error_count))
1052 return -EFAULT;
1053
1054 if (usb_pipeisoc(urb->pipe)) {
1055 for (i = 0; i < urb->number_of_packets; i++) {
1056 if (put_user(urb->iso_frame_desc[i].actual_length,
1057 &userurb->iso_frame_desc[i].actual_length))
1058 return -EFAULT;
1059 if (put_user(urb->iso_frame_desc[i].status,
1060 &userurb->iso_frame_desc[i].status))
1061 return -EFAULT;
1062 }
1063 }
1064
1065 free_async(as);
1066
1067 if (put_user(addr, (void __user * __user *)arg))
1068 return -EFAULT;
1069 return 0;
1070 }
1071
1072 static struct async* reap_as(struct dev_state *ps)
1073 {
1074 DECLARE_WAITQUEUE(wait, current);
1075 struct async *as = NULL;
1076 struct usb_device *dev = ps->dev;
1077
1078 add_wait_queue(&ps->wait, &wait);
1079 for (;;) {
1080 __set_current_state(TASK_INTERRUPTIBLE);
1081 if ((as = async_getcompleted(ps)))
1082 break;
1083 if (signal_pending(current))
1084 break;
1085 usb_unlock_device(dev);
1086 schedule();
1087 usb_lock_device(dev);
1088 }
1089 remove_wait_queue(&ps->wait, &wait);
1090 set_current_state(TASK_RUNNING);
1091 return as;
1092 }
1093
1094 static int proc_reapurb(struct dev_state *ps, void __user *arg)
1095 {
1096 struct async *as = reap_as(ps);
1097 if (as)
1098 return processcompl(as, (void __user * __user *)arg);
1099 if (signal_pending(current))
1100 return -EINTR;
1101 return -EIO;
1102 }
1103
1104 static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg)
1105 {
1106 struct async *as;
1107
1108 if (!(as = async_getcompleted(ps)))
1109 return -EAGAIN;
1110 return processcompl(as, (void __user * __user *)arg);
1111 }
1112
1113 #ifdef CONFIG_COMPAT
1114
1115 static int get_urb32(struct usbdevfs_urb *kurb,
1116 struct usbdevfs_urb32 __user *uurb)
1117 {
1118 __u32 uptr;
1119 if (get_user(kurb->type, &uurb->type) ||
1120 __get_user(kurb->endpoint, &uurb->endpoint) ||
1121 __get_user(kurb->status, &uurb->status) ||
1122 __get_user(kurb->flags, &uurb->flags) ||
1123 __get_user(kurb->buffer_length, &uurb->buffer_length) ||
1124 __get_user(kurb->actual_length, &uurb->actual_length) ||
1125 __get_user(kurb->start_frame, &uurb->start_frame) ||
1126 __get_user(kurb->number_of_packets, &uurb->number_of_packets) ||
1127 __get_user(kurb->error_count, &uurb->error_count) ||
1128 __get_user(kurb->signr, &uurb->signr))
1129 return -EFAULT;
1130
1131 if (__get_user(uptr, &uurb->buffer))
1132 return -EFAULT;
1133 kurb->buffer = compat_ptr(uptr);
1134 if (__get_user(uptr, &uurb->buffer))
1135 return -EFAULT;
1136 kurb->usercontext = compat_ptr(uptr);
1137
1138 return 0;
1139 }
1140
1141 static int proc_submiturb_compat(struct dev_state *ps, void __user *arg)
1142 {
1143 struct usbdevfs_urb uurb;
1144
1145 if (get_urb32(&uurb,(struct usbdevfs_urb32 *)arg))
1146 return -EFAULT;
1147
1148 return proc_do_submiturb(ps, &uurb, ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc, arg);
1149 }
1150
1151 static int processcompl_compat(struct async *as, void __user * __user *arg)
1152 {
1153 struct urb *urb = as->urb;
1154 struct usbdevfs_urb32 __user *userurb = as->userurb;
1155 void __user *addr = as->userurb;
1156 unsigned int i;
1157
1158 if (as->userbuffer)
1159 if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length))
1160 return -EFAULT;
1161 if (put_user(urb->status, &userurb->status))
1162 return -EFAULT;
1163 if (put_user(urb->actual_length, &userurb->actual_length))
1164 return -EFAULT;
1165 if (put_user(urb->error_count, &userurb->error_count))
1166 return -EFAULT;
1167
1168 if (usb_pipeisoc(urb->pipe)) {
1169 for (i = 0; i < urb->number_of_packets; i++) {
1170 if (put_user(urb->iso_frame_desc[i].actual_length,
1171 &userurb->iso_frame_desc[i].actual_length))
1172 return -EFAULT;
1173 if (put_user(urb->iso_frame_desc[i].status,
1174 &userurb->iso_frame_desc[i].status))
1175 return -EFAULT;
1176 }
1177 }
1178
1179 free_async(as);
1180 if (put_user((u32)(u64)addr, (u32 __user *)arg))
1181 return -EFAULT;
1182 return 0;
1183 }
1184
1185 static int proc_reapurb_compat(struct dev_state *ps, void __user *arg)
1186 {
1187 struct async *as = reap_as(ps);
1188 if (as)
1189 return processcompl_compat(as, (void __user * __user *)arg);
1190 if (signal_pending(current))
1191 return -EINTR;
1192 return -EIO;
1193 }
1194
1195 static int proc_reapurbnonblock_compat(struct dev_state *ps, void __user *arg)
1196 {
1197 struct async *as;
1198
1199 if (!(as = async_getcompleted(ps)))
1200 return -EAGAIN;
1201 return processcompl_compat(as, (void __user * __user *)arg);
1202 }
1203
1204 #endif
1205
1206 static int proc_disconnectsignal(struct dev_state *ps, void __user *arg)
1207 {
1208 struct usbdevfs_disconnectsignal ds;
1209
1210 if (copy_from_user(&ds, arg, sizeof(ds)))
1211 return -EFAULT;
1212 if (ds.signr != 0 && (ds.signr < SIGRTMIN || ds.signr > SIGRTMAX))
1213 return -EINVAL;
1214 ps->discsignr = ds.signr;
1215 ps->disccontext = ds.context;
1216 return 0;
1217 }
1218
1219 static int proc_claiminterface(struct dev_state *ps, void __user *arg)
1220 {
1221 unsigned int ifnum;
1222
1223 if (get_user(ifnum, (unsigned int __user *)arg))
1224 return -EFAULT;
1225 return claimintf(ps, ifnum);
1226 }
1227
1228 static int proc_releaseinterface(struct dev_state *ps, void __user *arg)
1229 {
1230 unsigned int ifnum;
1231 int ret;
1232
1233 if (get_user(ifnum, (unsigned int __user *)arg))
1234 return -EFAULT;
1235 if ((ret = releaseintf(ps, ifnum)) < 0)
1236 return ret;
1237 destroy_async_on_interface (ps, ifnum);
1238 return 0;
1239 }
1240
1241 static int proc_ioctl (struct dev_state *ps, void __user *arg)
1242 {
1243 struct usbdevfs_ioctl ctrl;
1244 int size;
1245 void *buf = NULL;
1246 int retval = 0;
1247 struct usb_interface *intf = NULL;
1248 struct usb_driver *driver = NULL;
1249
1250 /* get input parameters and alloc buffer */
1251 if (copy_from_user(&ctrl, arg, sizeof (ctrl)))
1252 return -EFAULT;
1253 if ((size = _IOC_SIZE (ctrl.ioctl_code)) > 0) {
1254 if ((buf = kmalloc (size, GFP_KERNEL)) == NULL)
1255 return -ENOMEM;
1256 if ((_IOC_DIR(ctrl.ioctl_code) & _IOC_WRITE)) {
1257 if (copy_from_user (buf, ctrl.data, size)) {
1258 kfree(buf);
1259 return -EFAULT;
1260 }
1261 } else {
1262 memset (buf, 0, size);
1263 }
1264 }
1265
1266 if (!connected(ps->dev)) {
1267 kfree(buf);
1268 return -ENODEV;
1269 }
1270
1271 if (ps->dev->state != USB_STATE_CONFIGURED)
1272 retval = -EHOSTUNREACH;
1273 else if (!(intf = usb_ifnum_to_if (ps->dev, ctrl.ifno)))
1274 retval = -EINVAL;
1275 else switch (ctrl.ioctl_code) {
1276
1277 /* disconnect kernel driver from interface */
1278 case USBDEVFS_DISCONNECT:
1279
1280 down_write(&usb_bus_type.subsys.rwsem);
1281 if (intf->dev.driver) {
1282 driver = to_usb_driver(intf->dev.driver);
1283 dev_dbg (&intf->dev, "disconnect by usbfs\n");
1284 usb_driver_release_interface(driver, intf);
1285 } else
1286 retval = -ENODATA;
1287 up_write(&usb_bus_type.subsys.rwsem);
1288 break;
1289
1290 /* let kernel drivers try to (re)bind to the interface */
1291 case USBDEVFS_CONNECT:
1292 usb_unlock_device(ps->dev);
1293 usb_lock_all_devices();
1294 bus_rescan_devices(intf->dev.bus);
1295 usb_unlock_all_devices();
1296 usb_lock_device(ps->dev);
1297 break;
1298
1299 /* talk directly to the interface's driver */
1300 default:
1301 down_read(&usb_bus_type.subsys.rwsem);
1302 if (intf->dev.driver)
1303 driver = to_usb_driver(intf->dev.driver);
1304 if (driver == NULL || driver->ioctl == NULL) {
1305 retval = -ENOTTY;
1306 } else {
1307 retval = driver->ioctl (intf, ctrl.ioctl_code, buf);
1308 if (retval == -ENOIOCTLCMD)
1309 retval = -ENOTTY;
1310 }
1311 up_read(&usb_bus_type.subsys.rwsem);
1312 }
1313
1314 /* cleanup and return */
1315 if (retval >= 0
1316 && (_IOC_DIR (ctrl.ioctl_code) & _IOC_READ) != 0
1317 && size > 0
1318 && copy_to_user (ctrl.data, buf, size) != 0)
1319 retval = -EFAULT;
1320
1321 kfree(buf);
1322 return retval;
1323 }
1324
1325 /*
1326 * NOTE: All requests here that have interface numbers as parameters
1327 * are assuming that somehow the configuration has been prevented from
1328 * changing. But there's no mechanism to ensure that...
1329 */
1330 static int usbdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
1331 {
1332 struct dev_state *ps = (struct dev_state *)file->private_data;
1333 struct usb_device *dev = ps->dev;
1334 void __user *p = (void __user *)arg;
1335 int ret = -ENOTTY;
1336
1337 if (!(file->f_mode & FMODE_WRITE))
1338 return -EPERM;
1339 usb_lock_device(dev);
1340 if (!connected(dev)) {
1341 usb_unlock_device(dev);
1342 return -ENODEV;
1343 }
1344
1345 switch (cmd) {
1346 case USBDEVFS_CONTROL:
1347 snoop(&dev->dev, "%s: CONTROL\n", __FUNCTION__);
1348 ret = proc_control(ps, p);
1349 if (ret >= 0)
1350 inode->i_mtime = CURRENT_TIME;
1351 break;
1352
1353 case USBDEVFS_BULK:
1354 snoop(&dev->dev, "%s: BULK\n", __FUNCTION__);
1355 ret = proc_bulk(ps, p);
1356 if (ret >= 0)
1357 inode->i_mtime = CURRENT_TIME;
1358 break;
1359
1360 case USBDEVFS_RESETEP:
1361 snoop(&dev->dev, "%s: RESETEP\n", __FUNCTION__);
1362 ret = proc_resetep(ps, p);
1363 if (ret >= 0)
1364 inode->i_mtime = CURRENT_TIME;
1365 break;
1366
1367 case USBDEVFS_RESET:
1368 snoop(&dev->dev, "%s: RESET\n", __FUNCTION__);
1369 ret = proc_resetdevice(ps);
1370 break;
1371
1372 case USBDEVFS_CLEAR_HALT:
1373 snoop(&dev->dev, "%s: CLEAR_HALT\n", __FUNCTION__);
1374 ret = proc_clearhalt(ps, p);
1375 if (ret >= 0)
1376 inode->i_mtime = CURRENT_TIME;
1377 break;
1378
1379 case USBDEVFS_GETDRIVER:
1380 snoop(&dev->dev, "%s: GETDRIVER\n", __FUNCTION__);
1381 ret = proc_getdriver(ps, p);
1382 break;
1383
1384 case USBDEVFS_CONNECTINFO:
1385 snoop(&dev->dev, "%s: CONNECTINFO\n", __FUNCTION__);
1386 ret = proc_connectinfo(ps, p);
1387 break;
1388
1389 case USBDEVFS_SETINTERFACE:
1390 snoop(&dev->dev, "%s: SETINTERFACE\n", __FUNCTION__);
1391 ret = proc_setintf(ps, p);
1392 break;
1393
1394 case USBDEVFS_SETCONFIGURATION:
1395 snoop(&dev->dev, "%s: SETCONFIGURATION\n", __FUNCTION__);
1396 ret = proc_setconfig(ps, p);
1397 break;
1398
1399 case USBDEVFS_SUBMITURB:
1400 snoop(&dev->dev, "%s: SUBMITURB\n", __FUNCTION__);
1401 ret = proc_submiturb(ps, p);
1402 if (ret >= 0)
1403 inode->i_mtime = CURRENT_TIME;
1404 break;
1405
1406 #ifdef CONFIG_COMPAT
1407
1408 case USBDEVFS_SUBMITURB32:
1409 snoop(&dev->dev, "%s: SUBMITURB32\n", __FUNCTION__);
1410 ret = proc_submiturb_compat(ps, p);
1411 if (ret >= 0)
1412 inode->i_mtime = CURRENT_TIME;
1413 break;
1414
1415 case USBDEVFS_REAPURB32:
1416 snoop(&dev->dev, "%s: REAPURB32\n", __FUNCTION__);
1417 ret = proc_reapurb_compat(ps, p);
1418 break;
1419
1420 case USBDEVFS_REAPURBNDELAY32:
1421 snoop(&dev->dev, "%s: REAPURBDELAY32\n", __FUNCTION__);
1422 ret = proc_reapurbnonblock_compat(ps, p);
1423 break;
1424
1425 #endif
1426
1427 case USBDEVFS_DISCARDURB:
1428 snoop(&dev->dev, "%s: DISCARDURB\n", __FUNCTION__);
1429 ret = proc_unlinkurb(ps, p);
1430 break;
1431
1432 case USBDEVFS_REAPURB:
1433 snoop(&dev->dev, "%s: REAPURB\n", __FUNCTION__);
1434 ret = proc_reapurb(ps, p);
1435 break;
1436
1437 case USBDEVFS_REAPURBNDELAY:
1438 snoop(&dev->dev, "%s: REAPURBDELAY\n", __FUNCTION__);
1439 ret = proc_reapurbnonblock(ps, p);
1440 break;
1441
1442 case USBDEVFS_DISCSIGNAL:
1443 snoop(&dev->dev, "%s: DISCSIGNAL\n", __FUNCTION__);
1444 ret = proc_disconnectsignal(ps, p);
1445 break;
1446
1447 case USBDEVFS_CLAIMINTERFACE:
1448 snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __FUNCTION__);
1449 ret = proc_claiminterface(ps, p);
1450 break;
1451
1452 case USBDEVFS_RELEASEINTERFACE:
1453 snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __FUNCTION__);
1454 ret = proc_releaseinterface(ps, p);
1455 break;
1456
1457 case USBDEVFS_IOCTL:
1458 snoop(&dev->dev, "%s: IOCTL\n", __FUNCTION__);
1459 ret = proc_ioctl(ps, p);
1460 break;
1461 }
1462 usb_unlock_device(dev);
1463 if (ret >= 0)
1464 inode->i_atime = CURRENT_TIME;
1465 return ret;
1466 }
1467
1468 /* No kernel lock - fine */
1469 static unsigned int usbdev_poll(struct file *file, struct poll_table_struct *wait)
1470 {
1471 struct dev_state *ps = (struct dev_state *)file->private_data;
1472 unsigned int mask = 0;
1473
1474 poll_wait(file, &ps->wait, wait);
1475 if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed))
1476 mask |= POLLOUT | POLLWRNORM;
1477 if (!connected(ps->dev))
1478 mask |= POLLERR | POLLHUP;
1479 return mask;
1480 }
1481
1482 struct file_operations usbfs_device_file_operations = {
1483 .llseek = usbdev_lseek,
1484 .read = usbdev_read,
1485 .poll = usbdev_poll,
1486 .ioctl = usbdev_ioctl,
1487 .open = usbdev_open,
1488 .release = usbdev_release,
1489 };
1490
1491 struct usb_device *usbdev_lookup_minor(int minor)
1492 {
1493 struct class_device *class_dev;
1494 struct usb_device *dev = NULL;
1495
1496 down(&usb_device_class->sem);
1497 list_for_each_entry(class_dev, &usb_device_class->children, node) {
1498 if (class_dev->devt == MKDEV(USB_DEVICE_MAJOR, minor)) {
1499 dev = class_dev->class_data;
1500 break;
1501 }
1502 }
1503 up(&usb_device_class->sem);
1504
1505 return dev;
1506 };
1507
1508 void usbdev_add(struct usb_device *dev)
1509 {
1510 int minor = ((dev->bus->busnum-1) * 128) + (dev->devnum-1);
1511
1512 dev->class_dev = class_device_create(usb_device_class, NULL,
1513 MKDEV(USB_DEVICE_MAJOR, minor), &dev->dev,
1514 "usbdev%d.%d", dev->bus->busnum, dev->devnum);
1515
1516 dev->class_dev->class_data = dev;
1517 }
1518
1519 void usbdev_remove(struct usb_device *dev)
1520 {
1521 class_device_unregister(dev->class_dev);
1522 }
1523
1524 static struct cdev usb_device_cdev = {
1525 .kobj = {.name = "usb_device", },
1526 .owner = THIS_MODULE,
1527 };
1528
1529 int __init usbdev_init(void)
1530 {
1531 int retval;
1532
1533 retval = register_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX,
1534 "usb_device");
1535 if (retval) {
1536 err("unable to register minors for usb_device");
1537 goto out;
1538 }
1539 cdev_init(&usb_device_cdev, &usbfs_device_file_operations);
1540 retval = cdev_add(&usb_device_cdev, USB_DEVICE_DEV, USB_DEVICE_MAX);
1541 if (retval) {
1542 err("unable to get usb_device major %d", USB_DEVICE_MAJOR);
1543 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
1544 goto out;
1545 }
1546 usb_device_class = class_create(THIS_MODULE, "usb_device");
1547 if (IS_ERR(usb_device_class)) {
1548 err("unable to register usb_device class");
1549 retval = PTR_ERR(usb_device_class);
1550 usb_device_class = NULL;
1551 cdev_del(&usb_device_cdev);
1552 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
1553 }
1554
1555 out:
1556 return retval;
1557 }
1558
1559 void usbdev_cleanup(void)
1560 {
1561 class_destroy(usb_device_class);
1562 cdev_del(&usb_device_cdev);
1563 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
1564 }
1565
Linux kernel - Deliverables
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