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USB: remove err() macro from usb core code
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / usb / core / devio.c
blob2bccefebff1b4a05caf7f07961751c68e73cc462
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 * This file implements the usbfs/x/y files, where
23 * x is the bus number and y the device number.
24 *
25 * It allows user space programs/"drivers" to communicate directly
26 * with USB devices without intervening kernel driver.
27 *
28 * Revision history
29 * 22.12.1999 0.1 Initial release (split from proc_usb.c)
30 * 04.01.2000 0.2 Turned into its own filesystem
31 * 30.09.2005 0.3 Fix user-triggerable oops in async URB delivery
32 * (CAN-2005-3055)
33 */
34
35 /*****************************************************************************/
36
37 #include <linux/fs.h>
38 #include <linux/mm.h>
39 #include <linux/slab.h>
40 #include <linux/smp_lock.h>
41 #include <linux/signal.h>
42 #include <linux/poll.h>
43 #include <linux/module.h>
44 #include <linux/usb.h>
45 #include <linux/usbdevice_fs.h>
46 #include <linux/cdev.h>
47 #include <linux/notifier.h>
48 #include <linux/security.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
59 /* Mutual exclusion for removal, open, and release */
60 DEFINE_MUTEX(usbfs_mutex);
61
62 struct dev_state {
63 struct list_head list; /* state list */
64 struct usb_device *dev;
65 struct file *file;
66 spinlock_t lock; /* protects the async urb lists */
67 struct list_head async_pending;
68 struct list_head async_completed;
69 wait_queue_head_t wait; /* wake up if a request completed */
70 unsigned int discsignr;
71 struct pid *disc_pid;
72 uid_t disc_uid, disc_euid;
73 void __user *disccontext;
74 unsigned long ifclaimed;
75 u32 secid;
76 };
77
78 struct async {
79 struct list_head asynclist;
80 struct dev_state *ps;
81 struct pid *pid;
82 uid_t uid, euid;
83 unsigned int signr;
84 unsigned int ifnum;
85 void __user *userbuffer;
86 void __user *userurb;
87 struct urb *urb;
88 int status;
89 u32 secid;
90 };
91
92 static int usbfs_snoop;
93 module_param(usbfs_snoop, bool, S_IRUGO | S_IWUSR);
94 MODULE_PARM_DESC(usbfs_snoop, "true to log all usbfs traffic");
95
96 #define snoop(dev, format, arg...) \
97 do { \
98 if (usbfs_snoop) \
99 dev_info(dev , format , ## arg); \
100 } while (0)
101
102 #define USB_DEVICE_DEV MKDEV(USB_DEVICE_MAJOR, 0)
103
104
105 #define MAX_USBFS_BUFFER_SIZE 16384
106
107 static inline int connected(struct dev_state *ps)
108 {
109 return (!list_empty(&ps->list) &&
110 ps->dev->state != USB_STATE_NOTATTACHED);
111 }
112
113 static loff_t usbdev_lseek(struct file *file, loff_t offset, int orig)
114 {
115 loff_t ret;
116
117 lock_kernel();
118
119 switch (orig) {
120 case 0:
121 file->f_pos = offset;
122 ret = file->f_pos;
123 break;
124 case 1:
125 file->f_pos += offset;
126 ret = file->f_pos;
127 break;
128 case 2:
129 default:
130 ret = -EINVAL;
131 }
132
133 unlock_kernel();
134 return ret;
135 }
136
137 static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes,
138 loff_t *ppos)
139 {
140 struct dev_state *ps = file->private_data;
141 struct usb_device *dev = ps->dev;
142 ssize_t ret = 0;
143 unsigned len;
144 loff_t pos;
145 int i;
146
147 pos = *ppos;
148 usb_lock_device(dev);
149 if (!connected(ps)) {
150 ret = -ENODEV;
151 goto err;
152 } else if (pos < 0) {
153 ret = -EINVAL;
154 goto err;
155 }
156
157 if (pos < sizeof(struct usb_device_descriptor)) {
158 /* 18 bytes - fits on the stack */
159 struct usb_device_descriptor temp_desc;
160
161 memcpy(&temp_desc, &dev->descriptor, sizeof(dev->descriptor));
162 le16_to_cpus(&temp_desc.bcdUSB);
163 le16_to_cpus(&temp_desc.idVendor);
164 le16_to_cpus(&temp_desc.idProduct);
165 le16_to_cpus(&temp_desc.bcdDevice);
166
167 len = sizeof(struct usb_device_descriptor) - pos;
168 if (len > nbytes)
169 len = nbytes;
170 if (copy_to_user(buf, ((char *)&temp_desc) + pos, len)) {
171 ret = -EFAULT;
172 goto err;
173 }
174
175 *ppos += len;
176 buf += len;
177 nbytes -= len;
178 ret += len;
179 }
180
181 pos = sizeof(struct usb_device_descriptor);
182 for (i = 0; nbytes && i < dev->descriptor.bNumConfigurations; i++) {
183 struct usb_config_descriptor *config =
184 (struct usb_config_descriptor *)dev->rawdescriptors[i];
185 unsigned int length = le16_to_cpu(config->wTotalLength);
186
187 if (*ppos < pos + length) {
188
189 /* The descriptor may claim to be longer than it
190 * really is. Here is the actual allocated length. */
191 unsigned alloclen =
192 le16_to_cpu(dev->config[i].desc.wTotalLength);
193
194 len = length - (*ppos - pos);
195 if (len > nbytes)
196 len = nbytes;
197
198 /* Simply don't write (skip over) unallocated parts */
199 if (alloclen > (*ppos - pos)) {
200 alloclen -= (*ppos - pos);
201 if (copy_to_user(buf,
202 dev->rawdescriptors[i] + (*ppos - pos),
203 min(len, alloclen))) {
204 ret = -EFAULT;
205 goto err;
206 }
207 }
208
209 *ppos += len;
210 buf += len;
211 nbytes -= len;
212 ret += len;
213 }
214
215 pos += length;
216 }
217
218 err:
219 usb_unlock_device(dev);
220 return ret;
221 }
222
223 /*
224 * async list handling
225 */
226
227 static struct async *alloc_async(unsigned int numisoframes)
228 {
229 struct async *as;
230
231 as = kzalloc(sizeof(struct async), GFP_KERNEL);
232 if (!as)
233 return NULL;
234 as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL);
235 if (!as->urb) {
236 kfree(as);
237 return NULL;
238 }
239 return as;
240 }
241
242 static void free_async(struct async *as)
243 {
244 put_pid(as->pid);
245 kfree(as->urb->transfer_buffer);
246 kfree(as->urb->setup_packet);
247 usb_free_urb(as->urb);
248 kfree(as);
249 }
250
251 static inline void async_newpending(struct async *as)
252 {
253 struct dev_state *ps = as->ps;
254 unsigned long flags;
255
256 spin_lock_irqsave(&ps->lock, flags);
257 list_add_tail(&as->asynclist, &ps->async_pending);
258 spin_unlock_irqrestore(&ps->lock, flags);
259 }
260
261 static inline void async_removepending(struct async *as)
262 {
263 struct dev_state *ps = as->ps;
264 unsigned long flags;
265
266 spin_lock_irqsave(&ps->lock, flags);
267 list_del_init(&as->asynclist);
268 spin_unlock_irqrestore(&ps->lock, flags);
269 }
270
271 static inline struct async *async_getcompleted(struct dev_state *ps)
272 {
273 unsigned long flags;
274 struct async *as = NULL;
275
276 spin_lock_irqsave(&ps->lock, flags);
277 if (!list_empty(&ps->async_completed)) {
278 as = list_entry(ps->async_completed.next, struct async,
279 asynclist);
280 list_del_init(&as->asynclist);
281 }
282 spin_unlock_irqrestore(&ps->lock, flags);
283 return as;
284 }
285
286 static inline struct async *async_getpending(struct dev_state *ps,
287 void __user *userurb)
288 {
289 unsigned long flags;
290 struct async *as;
291
292 spin_lock_irqsave(&ps->lock, flags);
293 list_for_each_entry(as, &ps->async_pending, asynclist)
294 if (as->userurb == userurb) {
295 list_del_init(&as->asynclist);
296 spin_unlock_irqrestore(&ps->lock, flags);
297 return as;
298 }
299 spin_unlock_irqrestore(&ps->lock, flags);
300 return NULL;
301 }
302
303 static void snoop_urb(struct urb *urb, void __user *userurb)
304 {
305 int j;
306 unsigned char *data = urb->transfer_buffer;
307
308 if (!usbfs_snoop)
309 return;
310
311 dev_info(&urb->dev->dev, "direction=%s\n",
312 usb_urb_dir_in(urb) ? "IN" : "OUT");
313 dev_info(&urb->dev->dev, "userurb=%p\n", userurb);
314 dev_info(&urb->dev->dev, "transfer_buffer_length=%d\n",
315 urb->transfer_buffer_length);
316 dev_info(&urb->dev->dev, "actual_length=%d\n", urb->actual_length);
317 dev_info(&urb->dev->dev, "data: ");
318 for (j = 0; j < urb->transfer_buffer_length; ++j)
319 printk("%02x ", data[j]);
320 printk("\n");
321 }
322
323 static void async_completed(struct urb *urb)
324 {
325 struct async *as = urb->context;
326 struct dev_state *ps = as->ps;
327 struct siginfo sinfo;
328
329 spin_lock(&ps->lock);
330 list_move_tail(&as->asynclist, &ps->async_completed);
331 spin_unlock(&ps->lock);
332 as->status = urb->status;
333 if (as->signr) {
334 sinfo.si_signo = as->signr;
335 sinfo.si_errno = as->status;
336 sinfo.si_code = SI_ASYNCIO;
337 sinfo.si_addr = as->userurb;
338 kill_pid_info_as_uid(as->signr, &sinfo, as->pid, as->uid,
339 as->euid, as->secid);
340 }
341 snoop(&urb->dev->dev, "urb complete\n");
342 snoop_urb(urb, as->userurb);
343 wake_up(&ps->wait);
344 }
345
346 static void destroy_async(struct dev_state *ps, struct list_head *list)
347 {
348 struct async *as;
349 unsigned long flags;
350
351 spin_lock_irqsave(&ps->lock, flags);
352 while (!list_empty(list)) {
353 as = list_entry(list->next, struct async, asynclist);
354 list_del_init(&as->asynclist);
355
356 /* drop the spinlock so the completion handler can run */
357 spin_unlock_irqrestore(&ps->lock, flags);
358 usb_kill_urb(as->urb);
359 spin_lock_irqsave(&ps->lock, flags);
360 }
361 spin_unlock_irqrestore(&ps->lock, flags);
362 as = async_getcompleted(ps);
363 while (as) {
364 free_async(as);
365 as = async_getcompleted(ps);
366 }
367 }
368
369 static void destroy_async_on_interface(struct dev_state *ps,
370 unsigned int ifnum)
371 {
372 struct list_head *p, *q, hitlist;
373 unsigned long flags;
374
375 INIT_LIST_HEAD(&hitlist);
376 spin_lock_irqsave(&ps->lock, flags);
377 list_for_each_safe(p, q, &ps->async_pending)
378 if (ifnum == list_entry(p, struct async, asynclist)->ifnum)
379 list_move_tail(p, &hitlist);
380 spin_unlock_irqrestore(&ps->lock, flags);
381 destroy_async(ps, &hitlist);
382 }
383
384 static inline void destroy_all_async(struct dev_state *ps)
385 {
386 destroy_async(ps, &ps->async_pending);
387 }
388
389 /*
390 * interface claims are made only at the request of user level code,
391 * which can also release them (explicitly or by closing files).
392 * they're also undone when devices disconnect.
393 */
394
395 static int driver_probe(struct usb_interface *intf,
396 const struct usb_device_id *id)
397 {
398 return -ENODEV;
399 }
400
401 static void driver_disconnect(struct usb_interface *intf)
402 {
403 struct dev_state *ps = usb_get_intfdata(intf);
404 unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber;
405
406 if (!ps)
407 return;
408
409 /* NOTE: this relies on usbcore having canceled and completed
410 * all pending I/O requests; 2.6 does that.
411 */
412
413 if (likely(ifnum < 8*sizeof(ps->ifclaimed)))
414 clear_bit(ifnum, &ps->ifclaimed);
415 else
416 dev_warn(&intf->dev, "interface number %u out of range\n",
417 ifnum);
418
419 usb_set_intfdata(intf, NULL);
420
421 /* force async requests to complete */
422 destroy_async_on_interface(ps, ifnum);
423 }
424
425 /* The following routines are merely placeholders. There is no way
426 * to inform a user task about suspend or resumes.
427 */
428 static int driver_suspend(struct usb_interface *intf, pm_message_t msg)
429 {
430 return 0;
431 }
432
433 static int driver_resume(struct usb_interface *intf)
434 {
435 return 0;
436 }
437
438 struct usb_driver usbfs_driver = {
439 .name = "usbfs",
440 .probe = driver_probe,
441 .disconnect = driver_disconnect,
442 .suspend = driver_suspend,
443 .resume = driver_resume,
444 };
445
446 static int claimintf(struct dev_state *ps, unsigned int ifnum)
447 {
448 struct usb_device *dev = ps->dev;
449 struct usb_interface *intf;
450 int err;
451
452 if (ifnum >= 8*sizeof(ps->ifclaimed))
453 return -EINVAL;
454 /* already claimed */
455 if (test_bit(ifnum, &ps->ifclaimed))
456 return 0;
457
458 intf = usb_ifnum_to_if(dev, ifnum);
459 if (!intf)
460 err = -ENOENT;
461 else
462 err = usb_driver_claim_interface(&usbfs_driver, intf, ps);
463 if (err == 0)
464 set_bit(ifnum, &ps->ifclaimed);
465 return err;
466 }
467
468 static int releaseintf(struct dev_state *ps, unsigned int ifnum)
469 {
470 struct usb_device *dev;
471 struct usb_interface *intf;
472 int err;
473
474 err = -EINVAL;
475 if (ifnum >= 8*sizeof(ps->ifclaimed))
476 return err;
477 dev = ps->dev;
478 intf = usb_ifnum_to_if(dev, ifnum);
479 if (!intf)
480 err = -ENOENT;
481 else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) {
482 usb_driver_release_interface(&usbfs_driver, intf);
483 err = 0;
484 }
485 return err;
486 }
487
488 static int checkintf(struct dev_state *ps, unsigned int ifnum)
489 {
490 if (ps->dev->state != USB_STATE_CONFIGURED)
491 return -EHOSTUNREACH;
492 if (ifnum >= 8*sizeof(ps->ifclaimed))
493 return -EINVAL;
494 if (test_bit(ifnum, &ps->ifclaimed))
495 return 0;
496 /* if not yet claimed, claim it for the driver */
497 dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim "
498 "interface %u before use\n", task_pid_nr(current),
499 current->comm, ifnum);
500 return claimintf(ps, ifnum);
501 }
502
503 static int findintfep(struct usb_device *dev, unsigned int ep)
504 {
505 unsigned int i, j, e;
506 struct usb_interface *intf;
507 struct usb_host_interface *alts;
508 struct usb_endpoint_descriptor *endpt;
509
510 if (ep & ~(USB_DIR_IN|0xf))
511 return -EINVAL;
512 if (!dev->actconfig)
513 return -ESRCH;
514 for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) {
515 intf = dev->actconfig->interface[i];
516 for (j = 0; j < intf->num_altsetting; j++) {
517 alts = &intf->altsetting[j];
518 for (e = 0; e < alts->desc.bNumEndpoints; e++) {
519 endpt = &alts->endpoint[e].desc;
520 if (endpt->bEndpointAddress == ep)
521 return alts->desc.bInterfaceNumber;
522 }
523 }
524 }
525 return -ENOENT;
526 }
527
528 static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype,
529 unsigned int index)
530 {
531 int ret = 0;
532
533 if (ps->dev->state != USB_STATE_ADDRESS
534 && ps->dev->state != USB_STATE_CONFIGURED)
535 return -EHOSTUNREACH;
536 if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype))
537 return 0;
538
539 index &= 0xff;
540 switch (requesttype & USB_RECIP_MASK) {
541 case USB_RECIP_ENDPOINT:
542 ret = findintfep(ps->dev, index);
543 if (ret >= 0)
544 ret = checkintf(ps, ret);
545 break;
546
547 case USB_RECIP_INTERFACE:
548 ret = checkintf(ps, index);
549 break;
550 }
551 return ret;
552 }
553
554 static int match_devt(struct device *dev, void *data)
555 {
556 return dev->devt == (dev_t) (unsigned long) data;
557 }
558
559 static struct usb_device *usbdev_lookup_by_devt(dev_t devt)
560 {
561 struct device *dev;
562
563 dev = bus_find_device(&usb_bus_type, NULL,
564 (void *) (unsigned long) devt, match_devt);
565 if (!dev)
566 return NULL;
567 return container_of(dev, struct usb_device, dev);
568 }
569
570 /*
571 * file operations
572 */
573 static int usbdev_open(struct inode *inode, struct file *file)
574 {
575 struct usb_device *dev = NULL;
576 struct dev_state *ps;
577 int ret;
578
579 lock_kernel();
580 /* Protect against simultaneous removal or release */
581 mutex_lock(&usbfs_mutex);
582
583 ret = -ENOMEM;
584 ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL);
585 if (!ps)
586 goto out;
587
588 ret = -ENOENT;
589
590 /* usbdev device-node */
591 if (imajor(inode) == USB_DEVICE_MAJOR)
592 dev = usbdev_lookup_by_devt(inode->i_rdev);
593 #ifdef CONFIG_USB_DEVICEFS
594 /* procfs file */
595 if (!dev) {
596 dev = inode->i_private;
597 if (dev && dev->usbfs_dentry &&
598 dev->usbfs_dentry->d_inode == inode)
599 usb_get_dev(dev);
600 else
601 dev = NULL;
602 }
603 #endif
604 if (!dev || dev->state == USB_STATE_NOTATTACHED)
605 goto out;
606 ret = usb_autoresume_device(dev);
607 if (ret)
608 goto out;
609
610 ret = 0;
611 ps->dev = dev;
612 ps->file = file;
613 spin_lock_init(&ps->lock);
614 INIT_LIST_HEAD(&ps->list);
615 INIT_LIST_HEAD(&ps->async_pending);
616 INIT_LIST_HEAD(&ps->async_completed);
617 init_waitqueue_head(&ps->wait);
618 ps->discsignr = 0;
619 ps->disc_pid = get_pid(task_pid(current));
620 ps->disc_uid = current->uid;
621 ps->disc_euid = current->euid;
622 ps->disccontext = NULL;
623 ps->ifclaimed = 0;
624 security_task_getsecid(current, &ps->secid);
625 smp_wmb();
626 list_add_tail(&ps->list, &dev->filelist);
627 file->private_data = ps;
628 snoop(&dev->dev, "opened by process %d: %s\n", task_pid_nr(current),
629 current->comm);
630 out:
631 if (ret) {
632 kfree(ps);
633 usb_put_dev(dev);
634 }
635 mutex_unlock(&usbfs_mutex);
636 unlock_kernel();
637 return ret;
638 }
639
640 static int usbdev_release(struct inode *inode, struct file *file)
641 {
642 struct dev_state *ps = file->private_data;
643 struct usb_device *dev = ps->dev;
644 unsigned int ifnum;
645
646 usb_lock_device(dev);
647
648 /* Protect against simultaneous open */
649 mutex_lock(&usbfs_mutex);
650 list_del_init(&ps->list);
651 mutex_unlock(&usbfs_mutex);
652
653 for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed);
654 ifnum++) {
655 if (test_bit(ifnum, &ps->ifclaimed))
656 releaseintf(ps, ifnum);
657 }
658 destroy_all_async(ps);
659 usb_autosuspend_device(dev);
660 usb_unlock_device(dev);
661 usb_put_dev(dev);
662 put_pid(ps->disc_pid);
663 kfree(ps);
664 return 0;
665 }
666
667 static int proc_control(struct dev_state *ps, void __user *arg)
668 {
669 struct usb_device *dev = ps->dev;
670 struct usbdevfs_ctrltransfer ctrl;
671 unsigned int tmo;
672 unsigned char *tbuf;
673 unsigned wLength;
674 int i, j, ret;
675
676 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
677 return -EFAULT;
678 ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.wIndex);
679 if (ret)
680 return ret;
681 wLength = ctrl.wLength; /* To suppress 64k PAGE_SIZE warning */
682 if (wLength > PAGE_SIZE)
683 return -EINVAL;
684 tbuf = (unsigned char *)__get_free_page(GFP_KERNEL);
685 if (!tbuf)
686 return -ENOMEM;
687 tmo = ctrl.timeout;
688 if (ctrl.bRequestType & 0x80) {
689 if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data,
690 ctrl.wLength)) {
691 free_page((unsigned long)tbuf);
692 return -EINVAL;
693 }
694 snoop(&dev->dev, "control read: bRequest=%02x "
695 "bRrequestType=%02x wValue=%04x "
696 "wIndex=%04x wLength=%04x\n",
697 ctrl.bRequest, ctrl.bRequestType, ctrl.wValue,
698 ctrl.wIndex, ctrl.wLength);
699
700 usb_unlock_device(dev);
701 i = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), ctrl.bRequest,
702 ctrl.bRequestType, ctrl.wValue, ctrl.wIndex,
703 tbuf, ctrl.wLength, tmo);
704 usb_lock_device(dev);
705 if ((i > 0) && ctrl.wLength) {
706 if (usbfs_snoop) {
707 dev_info(&dev->dev, "control read: data ");
708 for (j = 0; j < i; ++j)
709 printk("%02x ", (u8)(tbuf)[j]);
710 printk("\n");
711 }
712 if (copy_to_user(ctrl.data, tbuf, i)) {
713 free_page((unsigned long)tbuf);
714 return -EFAULT;
715 }
716 }
717 } else {
718 if (ctrl.wLength) {
719 if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) {
720 free_page((unsigned long)tbuf);
721 return -EFAULT;
722 }
723 }
724 snoop(&dev->dev, "control write: bRequest=%02x "
725 "bRrequestType=%02x wValue=%04x "
726 "wIndex=%04x wLength=%04x\n",
727 ctrl.bRequest, ctrl.bRequestType, ctrl.wValue,
728 ctrl.wIndex, ctrl.wLength);
729 if (usbfs_snoop) {
730 dev_info(&dev->dev, "control write: data: ");
731 for (j = 0; j < ctrl.wLength; ++j)
732 printk("%02x ", (unsigned char)(tbuf)[j]);
733 printk("\n");
734 }
735 usb_unlock_device(dev);
736 i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest,
737 ctrl.bRequestType, ctrl.wValue, ctrl.wIndex,
738 tbuf, ctrl.wLength, tmo);
739 usb_lock_device(dev);
740 }
741 free_page((unsigned long)tbuf);
742 if (i < 0 && i != -EPIPE) {
743 dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL "
744 "failed cmd %s rqt %u rq %u len %u ret %d\n",
745 current->comm, ctrl.bRequestType, ctrl.bRequest,
746 ctrl.wLength, i);
747 }
748 return i;
749 }
750
751 static int proc_bulk(struct dev_state *ps, void __user *arg)
752 {
753 struct usb_device *dev = ps->dev;
754 struct usbdevfs_bulktransfer bulk;
755 unsigned int tmo, len1, pipe;
756 int len2;
757 unsigned char *tbuf;
758 int i, j, ret;
759
760 if (copy_from_user(&bulk, arg, sizeof(bulk)))
761 return -EFAULT;
762 ret = findintfep(ps->dev, bulk.ep);
763 if (ret < 0)
764 return ret;
765 ret = checkintf(ps, ret);
766 if (ret)
767 return ret;
768 if (bulk.ep & USB_DIR_IN)
769 pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f);
770 else
771 pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f);
772 if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN)))
773 return -EINVAL;
774 len1 = bulk.len;
775 if (len1 > MAX_USBFS_BUFFER_SIZE)
776 return -EINVAL;
777 if (!(tbuf = kmalloc(len1, GFP_KERNEL)))
778 return -ENOMEM;
779 tmo = bulk.timeout;
780 if (bulk.ep & 0x80) {
781 if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) {
782 kfree(tbuf);
783 return -EINVAL;
784 }
785 snoop(&dev->dev, "bulk read: len=0x%02x timeout=%04d\n",
786 bulk.len, bulk.timeout);
787 usb_unlock_device(dev);
788 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
789 usb_lock_device(dev);
790 if (!i && len2) {
791 if (usbfs_snoop) {
792 dev_info(&dev->dev, "bulk read: data ");
793 for (j = 0; j < len2; ++j)
794 printk("%02x ", (u8)(tbuf)[j]);
795 printk("\n");
796 }
797 if (copy_to_user(bulk.data, tbuf, len2)) {
798 kfree(tbuf);
799 return -EFAULT;
800 }
801 }
802 } else {
803 if (len1) {
804 if (copy_from_user(tbuf, bulk.data, len1)) {
805 kfree(tbuf);
806 return -EFAULT;
807 }
808 }
809 snoop(&dev->dev, "bulk write: len=0x%02x timeout=%04d\n",
810 bulk.len, bulk.timeout);
811 if (usbfs_snoop) {
812 dev_info(&dev->dev, "bulk write: data: ");
813 for (j = 0; j < len1; ++j)
814 printk("%02x ", (unsigned char)(tbuf)[j]);
815 printk("\n");
816 }
817 usb_unlock_device(dev);
818 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
819 usb_lock_device(dev);
820 }
821 kfree(tbuf);
822 if (i < 0)
823 return i;
824 return len2;
825 }
826
827 static int proc_resetep(struct dev_state *ps, void __user *arg)
828 {
829 unsigned int ep;
830 int ret;
831
832 if (get_user(ep, (unsigned int __user *)arg))
833 return -EFAULT;
834 ret = findintfep(ps->dev, ep);
835 if (ret < 0)
836 return ret;
837 ret = checkintf(ps, ret);
838 if (ret)
839 return ret;
840 usb_settoggle(ps->dev, ep & 0xf, !(ep & USB_DIR_IN), 0);
841 return 0;
842 }
843
844 static int proc_clearhalt(struct dev_state *ps, void __user *arg)
845 {
846 unsigned int ep;
847 int pipe;
848 int ret;
849
850 if (get_user(ep, (unsigned int __user *)arg))
851 return -EFAULT;
852 ret = findintfep(ps->dev, ep);
853 if (ret < 0)
854 return ret;
855 ret = checkintf(ps, ret);
856 if (ret)
857 return ret;
858 if (ep & USB_DIR_IN)
859 pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f);
860 else
861 pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f);
862
863 return usb_clear_halt(ps->dev, pipe);
864 }
865
866 static int proc_getdriver(struct dev_state *ps, void __user *arg)
867 {
868 struct usbdevfs_getdriver gd;
869 struct usb_interface *intf;
870 int ret;
871
872 if (copy_from_user(&gd, arg, sizeof(gd)))
873 return -EFAULT;
874 intf = usb_ifnum_to_if(ps->dev, gd.interface);
875 if (!intf || !intf->dev.driver)
876 ret = -ENODATA;
877 else {
878 strncpy(gd.driver, intf->dev.driver->name,
879 sizeof(gd.driver));
880 ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0);
881 }
882 return ret;
883 }
884
885 static int proc_connectinfo(struct dev_state *ps, void __user *arg)
886 {
887 struct usbdevfs_connectinfo ci;
888
889 ci.devnum = ps->dev->devnum;
890 ci.slow = ps->dev->speed == USB_SPEED_LOW;
891 if (copy_to_user(arg, &ci, sizeof(ci)))
892 return -EFAULT;
893 return 0;
894 }
895
896 static int proc_resetdevice(struct dev_state *ps)
897 {
898 return usb_reset_device(ps->dev);
899 }
900
901 static int proc_setintf(struct dev_state *ps, void __user *arg)
902 {
903 struct usbdevfs_setinterface setintf;
904 int ret;
905
906 if (copy_from_user(&setintf, arg, sizeof(setintf)))
907 return -EFAULT;
908 if ((ret = checkintf(ps, setintf.interface)))
909 return ret;
910 return usb_set_interface(ps->dev, setintf.interface,
911 setintf.altsetting);
912 }
913
914 static int proc_setconfig(struct dev_state *ps, void __user *arg)
915 {
916 int u;
917 int status = 0;
918 struct usb_host_config *actconfig;
919
920 if (get_user(u, (int __user *)arg))
921 return -EFAULT;
922
923 actconfig = ps->dev->actconfig;
924
925 /* Don't touch the device if any interfaces are claimed.
926 * It could interfere with other drivers' operations, and if
927 * an interface is claimed by usbfs it could easily deadlock.
928 */
929 if (actconfig) {
930 int i;
931
932 for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) {
933 if (usb_interface_claimed(actconfig->interface[i])) {
934 dev_warn(&ps->dev->dev,
935 "usbfs: interface %d claimed by %s "
936 "while '%s' sets config #%d\n",
937 actconfig->interface[i]
938 ->cur_altsetting
939 ->desc.bInterfaceNumber,
940 actconfig->interface[i]
941 ->dev.driver->name,
942 current->comm, u);
943 status = -EBUSY;
944 break;
945 }
946 }
947 }
948
949 /* SET_CONFIGURATION is often abused as a "cheap" driver reset,
950 * so avoid usb_set_configuration()'s kick to sysfs
951 */
952 if (status == 0) {
953 if (actconfig && actconfig->desc.bConfigurationValue == u)
954 status = usb_reset_configuration(ps->dev);
955 else
956 status = usb_set_configuration(ps->dev, u);
957 }
958
959 return status;
960 }
961
962 static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
963 struct usbdevfs_iso_packet_desc __user *iso_frame_desc,
964 void __user *arg)
965 {
966 struct usbdevfs_iso_packet_desc *isopkt = NULL;
967 struct usb_host_endpoint *ep;
968 struct async *as;
969 struct usb_ctrlrequest *dr = NULL;
970 unsigned int u, totlen, isofrmlen;
971 int ret, ifnum = -1;
972 int is_in;
973
974 if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP |
975 USBDEVFS_URB_SHORT_NOT_OK |
976 USBDEVFS_URB_NO_FSBR |
977 USBDEVFS_URB_ZERO_PACKET |
978 USBDEVFS_URB_NO_INTERRUPT))
979 return -EINVAL;
980 if (!uurb->buffer)
981 return -EINVAL;
982 if (uurb->signr != 0 && (uurb->signr < SIGRTMIN ||
983 uurb->signr > SIGRTMAX))
984 return -EINVAL;
985 if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL &&
986 (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) {
987 ifnum = findintfep(ps->dev, uurb->endpoint);
988 if (ifnum < 0)
989 return ifnum;
990 ret = checkintf(ps, ifnum);
991 if (ret)
992 return ret;
993 }
994 if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0) {
995 is_in = 1;
996 ep = ps->dev->ep_in[uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
997 } else {
998 is_in = 0;
999 ep = ps->dev->ep_out[uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
1000 }
1001 if (!ep)
1002 return -ENOENT;
1003 switch(uurb->type) {
1004 case USBDEVFS_URB_TYPE_CONTROL:
1005 if (!usb_endpoint_xfer_control(&ep->desc))
1006 return -EINVAL;
1007 /* min 8 byte setup packet,
1008 * max 8 byte setup plus an arbitrary data stage */
1009 if (uurb->buffer_length < 8 ||
1010 uurb->buffer_length > (8 + MAX_USBFS_BUFFER_SIZE))
1011 return -EINVAL;
1012 dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL);
1013 if (!dr)
1014 return -ENOMEM;
1015 if (copy_from_user(dr, uurb->buffer, 8)) {
1016 kfree(dr);
1017 return -EFAULT;
1018 }
1019 if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) {
1020 kfree(dr);
1021 return -EINVAL;
1022 }
1023 ret = check_ctrlrecip(ps, dr->bRequestType,
1024 le16_to_cpup(&dr->wIndex));
1025 if (ret) {
1026 kfree(dr);
1027 return ret;
1028 }
1029 uurb->number_of_packets = 0;
1030 uurb->buffer_length = le16_to_cpup(&dr->wLength);
1031 uurb->buffer += 8;
1032 if ((dr->bRequestType & USB_DIR_IN) && uurb->buffer_length) {
1033 is_in = 1;
1034 uurb->endpoint |= USB_DIR_IN;
1035 } else {
1036 is_in = 0;
1037 uurb->endpoint &= ~USB_DIR_IN;
1038 }
1039 if (!access_ok(is_in ? VERIFY_WRITE : VERIFY_READ,
1040 uurb->buffer, uurb->buffer_length)) {
1041 kfree(dr);
1042 return -EFAULT;
1043 }
1044 snoop(&ps->dev->dev, "control urb: bRequest=%02x "
1045 "bRrequestType=%02x wValue=%04x "
1046 "wIndex=%04x wLength=%04x\n",
1047 dr->bRequest, dr->bRequestType,
1048 __le16_to_cpup(&dr->wValue),
1049 __le16_to_cpup(&dr->wIndex),
1050 __le16_to_cpup(&dr->wLength));
1051 break;
1052
1053 case USBDEVFS_URB_TYPE_BULK:
1054 switch (usb_endpoint_type(&ep->desc)) {
1055 case USB_ENDPOINT_XFER_CONTROL:
1056 case USB_ENDPOINT_XFER_ISOC:
1057 return -EINVAL;
1058 /* allow single-shot interrupt transfers, at bogus rates */
1059 }
1060 uurb->number_of_packets = 0;
1061 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE)
1062 return -EINVAL;
1063 if (!access_ok(is_in ? VERIFY_WRITE : VERIFY_READ,
1064 uurb->buffer, uurb->buffer_length))
1065 return -EFAULT;
1066 snoop(&ps->dev->dev, "bulk urb\n");
1067 break;
1068
1069 case USBDEVFS_URB_TYPE_ISO:
1070 /* arbitrary limit */
1071 if (uurb->number_of_packets < 1 ||
1072 uurb->number_of_packets > 128)
1073 return -EINVAL;
1074 if (!usb_endpoint_xfer_isoc(&ep->desc))
1075 return -EINVAL;
1076 isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) *
1077 uurb->number_of_packets;
1078 if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL)))
1079 return -ENOMEM;
1080 if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) {
1081 kfree(isopkt);
1082 return -EFAULT;
1083 }
1084 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
1085 /* arbitrary limit,
1086 * sufficient for USB 2.0 high-bandwidth iso */
1087 if (isopkt[u].length > 8192) {
1088 kfree(isopkt);
1089 return -EINVAL;
1090 }
1091 totlen += isopkt[u].length;
1092 }
1093 if (totlen > 32768) {
1094 kfree(isopkt);
1095 return -EINVAL;
1096 }
1097 uurb->buffer_length = totlen;
1098 snoop(&ps->dev->dev, "iso urb\n");
1099 break;
1100
1101 case USBDEVFS_URB_TYPE_INTERRUPT:
1102 uurb->number_of_packets = 0;
1103 if (!usb_endpoint_xfer_int(&ep->desc))
1104 return -EINVAL;
1105 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE)
1106 return -EINVAL;
1107 if (!access_ok(is_in ? VERIFY_WRITE : VERIFY_READ,
1108 uurb->buffer, uurb->buffer_length))
1109 return -EFAULT;
1110 snoop(&ps->dev->dev, "interrupt urb\n");
1111 break;
1112
1113 default:
1114 return -EINVAL;
1115 }
1116 as = alloc_async(uurb->number_of_packets);
1117 if (!as) {
1118 kfree(isopkt);
1119 kfree(dr);
1120 return -ENOMEM;
1121 }
1122 as->urb->transfer_buffer = kmalloc(uurb->buffer_length, GFP_KERNEL);
1123 if (!as->urb->transfer_buffer) {
1124 kfree(isopkt);
1125 kfree(dr);
1126 free_async(as);
1127 return -ENOMEM;
1128 }
1129 as->urb->dev = ps->dev;
1130 as->urb->pipe = (uurb->type << 30) |
1131 __create_pipe(ps->dev, uurb->endpoint & 0xf) |
1132 (uurb->endpoint & USB_DIR_IN);
1133
1134 /* This tedious sequence is necessary because the URB_* flags
1135 * are internal to the kernel and subject to change, whereas
1136 * the USBDEVFS_URB_* flags are a user API and must not be changed.
1137 */
1138 u = (is_in ? URB_DIR_IN : URB_DIR_OUT);
1139 if (uurb->flags & USBDEVFS_URB_ISO_ASAP)
1140 u |= URB_ISO_ASAP;
1141 if (uurb->flags & USBDEVFS_URB_SHORT_NOT_OK)
1142 u |= URB_SHORT_NOT_OK;
1143 if (uurb->flags & USBDEVFS_URB_NO_FSBR)
1144 u |= URB_NO_FSBR;
1145 if (uurb->flags & USBDEVFS_URB_ZERO_PACKET)
1146 u |= URB_ZERO_PACKET;
1147 if (uurb->flags & USBDEVFS_URB_NO_INTERRUPT)
1148 u |= URB_NO_INTERRUPT;
1149 as->urb->transfer_flags = u;
1150
1151 as->urb->transfer_buffer_length = uurb->buffer_length;
1152 as->urb->setup_packet = (unsigned char *)dr;
1153 as->urb->start_frame = uurb->start_frame;
1154 as->urb->number_of_packets = uurb->number_of_packets;
1155 if (uurb->type == USBDEVFS_URB_TYPE_ISO ||
1156 ps->dev->speed == USB_SPEED_HIGH)
1157 as->urb->interval = 1 << min(15, ep->desc.bInterval - 1);
1158 else
1159 as->urb->interval = ep->desc.bInterval;
1160 as->urb->context = as;
1161 as->urb->complete = async_completed;
1162 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
1163 as->urb->iso_frame_desc[u].offset = totlen;
1164 as->urb->iso_frame_desc[u].length = isopkt[u].length;
1165 totlen += isopkt[u].length;
1166 }
1167 kfree(isopkt);
1168 as->ps = ps;
1169 as->userurb = arg;
1170 if (uurb->endpoint & USB_DIR_IN)
1171 as->userbuffer = uurb->buffer;
1172 else
1173 as->userbuffer = NULL;
1174 as->signr = uurb->signr;
1175 as->ifnum = ifnum;
1176 as->pid = get_pid(task_pid(current));
1177 as->uid = current->uid;
1178 as->euid = current->euid;
1179 security_task_getsecid(current, &as->secid);
1180 if (!is_in) {
1181 if (copy_from_user(as->urb->transfer_buffer, uurb->buffer,
1182 as->urb->transfer_buffer_length)) {
1183 free_async(as);
1184 return -EFAULT;
1185 }
1186 }
1187 snoop_urb(as->urb, as->userurb);
1188 async_newpending(as);
1189 if ((ret = usb_submit_urb(as->urb, GFP_KERNEL))) {
1190 dev_printk(KERN_DEBUG, &ps->dev->dev,
1191 "usbfs: usb_submit_urb returned %d\n", ret);
1192 async_removepending(as);
1193 free_async(as);
1194 return ret;
1195 }
1196 return 0;
1197 }
1198
1199 static int proc_submiturb(struct dev_state *ps, void __user *arg)
1200 {
1201 struct usbdevfs_urb uurb;
1202
1203 if (copy_from_user(&uurb, arg, sizeof(uurb)))
1204 return -EFAULT;
1205
1206 return proc_do_submiturb(ps, &uurb,
1207 (((struct usbdevfs_urb __user *)arg)->iso_frame_desc),
1208 arg);
1209 }
1210
1211 static int proc_unlinkurb(struct dev_state *ps, void __user *arg)
1212 {
1213 struct async *as;
1214
1215 as = async_getpending(ps, arg);
1216 if (!as)
1217 return -EINVAL;
1218 usb_kill_urb(as->urb);
1219 return 0;
1220 }
1221
1222 static int processcompl(struct async *as, void __user * __user *arg)
1223 {
1224 struct urb *urb = as->urb;
1225 struct usbdevfs_urb __user *userurb = as->userurb;
1226 void __user *addr = as->userurb;
1227 unsigned int i;
1228
1229 if (as->userbuffer)
1230 if (copy_to_user(as->userbuffer, urb->transfer_buffer,
1231 urb->transfer_buffer_length))
1232 return -EFAULT;
1233 if (put_user(as->status, &userurb->status))
1234 return -EFAULT;
1235 if (put_user(urb->actual_length, &userurb->actual_length))
1236 return -EFAULT;
1237 if (put_user(urb->error_count, &userurb->error_count))
1238 return -EFAULT;
1239
1240 if (usb_endpoint_xfer_isoc(&urb->ep->desc)) {
1241 for (i = 0; i < urb->number_of_packets; i++) {
1242 if (put_user(urb->iso_frame_desc[i].actual_length,
1243 &userurb->iso_frame_desc[i].actual_length))
1244 return -EFAULT;
1245 if (put_user(urb->iso_frame_desc[i].status,
1246 &userurb->iso_frame_desc[i].status))
1247 return -EFAULT;
1248 }
1249 }
1250
1251 free_async(as);
1252
1253 if (put_user(addr, (void __user * __user *)arg))
1254 return -EFAULT;
1255 return 0;
1256 }
1257
1258 static struct async *reap_as(struct dev_state *ps)
1259 {
1260 DECLARE_WAITQUEUE(wait, current);
1261 struct async *as = NULL;
1262 struct usb_device *dev = ps->dev;
1263
1264 add_wait_queue(&ps->wait, &wait);
1265 for (;;) {
1266 __set_current_state(TASK_INTERRUPTIBLE);
1267 as = async_getcompleted(ps);
1268 if (as)
1269 break;
1270 if (signal_pending(current))
1271 break;
1272 usb_unlock_device(dev);
1273 schedule();
1274 usb_lock_device(dev);
1275 }
1276 remove_wait_queue(&ps->wait, &wait);
1277 set_current_state(TASK_RUNNING);
1278 return as;
1279 }
1280
1281 static int proc_reapurb(struct dev_state *ps, void __user *arg)
1282 {
1283 struct async *as = reap_as(ps);
1284 if (as)
1285 return processcompl(as, (void __user * __user *)arg);
1286 if (signal_pending(current))
1287 return -EINTR;
1288 return -EIO;
1289 }
1290
1291 static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg)
1292 {
1293 struct async *as;
1294
1295 if (!(as = async_getcompleted(ps)))
1296 return -EAGAIN;
1297 return processcompl(as, (void __user * __user *)arg);
1298 }
1299
1300 #ifdef CONFIG_COMPAT
1301
1302 static int get_urb32(struct usbdevfs_urb *kurb,
1303 struct usbdevfs_urb32 __user *uurb)
1304 {
1305 __u32 uptr;
1306 if (get_user(kurb->type, &uurb->type) ||
1307 __get_user(kurb->endpoint, &uurb->endpoint) ||
1308 __get_user(kurb->status, &uurb->status) ||
1309 __get_user(kurb->flags, &uurb->flags) ||
1310 __get_user(kurb->buffer_length, &uurb->buffer_length) ||
1311 __get_user(kurb->actual_length, &uurb->actual_length) ||
1312 __get_user(kurb->start_frame, &uurb->start_frame) ||
1313 __get_user(kurb->number_of_packets, &uurb->number_of_packets) ||
1314 __get_user(kurb->error_count, &uurb->error_count) ||
1315 __get_user(kurb->signr, &uurb->signr))
1316 return -EFAULT;
1317
1318 if (__get_user(uptr, &uurb->buffer))
1319 return -EFAULT;
1320 kurb->buffer = compat_ptr(uptr);
1321 if (__get_user(uptr, &uurb->buffer))
1322 return -EFAULT;
1323 kurb->usercontext = compat_ptr(uptr);
1324
1325 return 0;
1326 }
1327
1328 static int proc_submiturb_compat(struct dev_state *ps, void __user *arg)
1329 {
1330 struct usbdevfs_urb uurb;
1331
1332 if (get_urb32(&uurb, (struct usbdevfs_urb32 __user *)arg))
1333 return -EFAULT;
1334
1335 return proc_do_submiturb(ps, &uurb,
1336 ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc,
1337 arg);
1338 }
1339
1340 static int processcompl_compat(struct async *as, void __user * __user *arg)
1341 {
1342 struct urb *urb = as->urb;
1343 struct usbdevfs_urb32 __user *userurb = as->userurb;
1344 void __user *addr = as->userurb;
1345 unsigned int i;
1346
1347 if (as->userbuffer)
1348 if (copy_to_user(as->userbuffer, urb->transfer_buffer,
1349 urb->transfer_buffer_length))
1350 return -EFAULT;
1351 if (put_user(as->status, &userurb->status))
1352 return -EFAULT;
1353 if (put_user(urb->actual_length, &userurb->actual_length))
1354 return -EFAULT;
1355 if (put_user(urb->error_count, &userurb->error_count))
1356 return -EFAULT;
1357
1358 if (usb_endpoint_xfer_isoc(&urb->ep->desc)) {
1359 for (i = 0; i < urb->number_of_packets; i++) {
1360 if (put_user(urb->iso_frame_desc[i].actual_length,
1361 &userurb->iso_frame_desc[i].actual_length))
1362 return -EFAULT;
1363 if (put_user(urb->iso_frame_desc[i].status,
1364 &userurb->iso_frame_desc[i].status))
1365 return -EFAULT;
1366 }
1367 }
1368
1369 free_async(as);
1370 if (put_user(ptr_to_compat(addr), (u32 __user *)arg))
1371 return -EFAULT;
1372 return 0;
1373 }
1374
1375 static int proc_reapurb_compat(struct dev_state *ps, void __user *arg)
1376 {
1377 struct async *as = reap_as(ps);
1378 if (as)
1379 return processcompl_compat(as, (void __user * __user *)arg);
1380 if (signal_pending(current))
1381 return -EINTR;
1382 return -EIO;
1383 }
1384
1385 static int proc_reapurbnonblock_compat(struct dev_state *ps, void __user *arg)
1386 {
1387 struct async *as;
1388
1389 if (!(as = async_getcompleted(ps)))
1390 return -EAGAIN;
1391 return processcompl_compat(as, (void __user * __user *)arg);
1392 }
1393
1394 #endif
1395
1396 static int proc_disconnectsignal(struct dev_state *ps, void __user *arg)
1397 {
1398 struct usbdevfs_disconnectsignal ds;
1399
1400 if (copy_from_user(&ds, arg, sizeof(ds)))
1401 return -EFAULT;
1402 if (ds.signr != 0 && (ds.signr < SIGRTMIN || ds.signr > SIGRTMAX))
1403 return -EINVAL;
1404 ps->discsignr = ds.signr;
1405 ps->disccontext = ds.context;
1406 return 0;
1407 }
1408
1409 static int proc_claiminterface(struct dev_state *ps, void __user *arg)
1410 {
1411 unsigned int ifnum;
1412
1413 if (get_user(ifnum, (unsigned int __user *)arg))
1414 return -EFAULT;
1415 return claimintf(ps, ifnum);
1416 }
1417
1418 static int proc_releaseinterface(struct dev_state *ps, void __user *arg)
1419 {
1420 unsigned int ifnum;
1421 int ret;
1422
1423 if (get_user(ifnum, (unsigned int __user *)arg))
1424 return -EFAULT;
1425 if ((ret = releaseintf(ps, ifnum)) < 0)
1426 return ret;
1427 destroy_async_on_interface (ps, ifnum);
1428 return 0;
1429 }
1430
1431 static int proc_ioctl(struct dev_state *ps, struct usbdevfs_ioctl *ctl)
1432 {
1433 int size;
1434 void *buf = NULL;
1435 int retval = 0;
1436 struct usb_interface *intf = NULL;
1437 struct usb_driver *driver = NULL;
1438
1439 /* alloc buffer */
1440 if ((size = _IOC_SIZE(ctl->ioctl_code)) > 0) {
1441 if ((buf = kmalloc(size, GFP_KERNEL)) == NULL)
1442 return -ENOMEM;
1443 if ((_IOC_DIR(ctl->ioctl_code) & _IOC_WRITE)) {
1444 if (copy_from_user(buf, ctl->data, size)) {
1445 kfree(buf);
1446 return -EFAULT;
1447 }
1448 } else {
1449 memset(buf, 0, size);
1450 }
1451 }
1452
1453 if (!connected(ps)) {
1454 kfree(buf);
1455 return -ENODEV;
1456 }
1457
1458 if (ps->dev->state != USB_STATE_CONFIGURED)
1459 retval = -EHOSTUNREACH;
1460 else if (!(intf = usb_ifnum_to_if(ps->dev, ctl->ifno)))
1461 retval = -EINVAL;
1462 else switch (ctl->ioctl_code) {
1463
1464 /* disconnect kernel driver from interface */
1465 case USBDEVFS_DISCONNECT:
1466 if (intf->dev.driver) {
1467 driver = to_usb_driver(intf->dev.driver);
1468 dev_dbg(&intf->dev, "disconnect by usbfs\n");
1469 usb_driver_release_interface(driver, intf);
1470 } else
1471 retval = -ENODATA;
1472 break;
1473
1474 /* let kernel drivers try to (re)bind to the interface */
1475 case USBDEVFS_CONNECT:
1476 if (!intf->dev.driver)
1477 retval = device_attach(&intf->dev);
1478 else
1479 retval = -EBUSY;
1480 break;
1481
1482 /* talk directly to the interface's driver */
1483 default:
1484 if (intf->dev.driver)
1485 driver = to_usb_driver(intf->dev.driver);
1486 if (driver == NULL || driver->ioctl == NULL) {
1487 retval = -ENOTTY;
1488 } else {
1489 retval = driver->ioctl(intf, ctl->ioctl_code, buf);
1490 if (retval == -ENOIOCTLCMD)
1491 retval = -ENOTTY;
1492 }
1493 }
1494
1495 /* cleanup and return */
1496 if (retval >= 0
1497 && (_IOC_DIR(ctl->ioctl_code) & _IOC_READ) != 0
1498 && size > 0
1499 && copy_to_user(ctl->data, buf, size) != 0)
1500 retval = -EFAULT;
1501
1502 kfree(buf);
1503 return retval;
1504 }
1505
1506 static int proc_ioctl_default(struct dev_state *ps, void __user *arg)
1507 {
1508 struct usbdevfs_ioctl ctrl;
1509
1510 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
1511 return -EFAULT;
1512 return proc_ioctl(ps, &ctrl);
1513 }
1514
1515 #ifdef CONFIG_COMPAT
1516 static int proc_ioctl_compat(struct dev_state *ps, compat_uptr_t arg)
1517 {
1518 struct usbdevfs_ioctl32 __user *uioc;
1519 struct usbdevfs_ioctl ctrl;
1520 u32 udata;
1521
1522 uioc = compat_ptr((long)arg);
1523 if (get_user(ctrl.ifno, &uioc->ifno) ||
1524 get_user(ctrl.ioctl_code, &uioc->ioctl_code) ||
1525 __get_user(udata, &uioc->data))
1526 return -EFAULT;
1527 ctrl.data = compat_ptr(udata);
1528
1529 return proc_ioctl(ps, &ctrl);
1530 }
1531 #endif
1532
1533 /*
1534 * NOTE: All requests here that have interface numbers as parameters
1535 * are assuming that somehow the configuration has been prevented from
1536 * changing. But there's no mechanism to ensure that...
1537 */
1538 static int usbdev_ioctl(struct inode *inode, struct file *file,
1539 unsigned int cmd, unsigned long arg)
1540 {
1541 struct dev_state *ps = file->private_data;
1542 struct usb_device *dev = ps->dev;
1543 void __user *p = (void __user *)arg;
1544 int ret = -ENOTTY;
1545
1546 if (!(file->f_mode & FMODE_WRITE))
1547 return -EPERM;
1548 usb_lock_device(dev);
1549 if (!connected(ps)) {
1550 usb_unlock_device(dev);
1551 return -ENODEV;
1552 }
1553
1554 switch (cmd) {
1555 case USBDEVFS_CONTROL:
1556 snoop(&dev->dev, "%s: CONTROL\n", __func__);
1557 ret = proc_control(ps, p);
1558 if (ret >= 0)
1559 inode->i_mtime = CURRENT_TIME;
1560 break;
1561
1562 case USBDEVFS_BULK:
1563 snoop(&dev->dev, "%s: BULK\n", __func__);
1564 ret = proc_bulk(ps, p);
1565 if (ret >= 0)
1566 inode->i_mtime = CURRENT_TIME;
1567 break;
1568
1569 case USBDEVFS_RESETEP:
1570 snoop(&dev->dev, "%s: RESETEP\n", __func__);
1571 ret = proc_resetep(ps, p);
1572 if (ret >= 0)
1573 inode->i_mtime = CURRENT_TIME;
1574 break;
1575
1576 case USBDEVFS_RESET:
1577 snoop(&dev->dev, "%s: RESET\n", __func__);
1578 ret = proc_resetdevice(ps);
1579 break;
1580
1581 case USBDEVFS_CLEAR_HALT:
1582 snoop(&dev->dev, "%s: CLEAR_HALT\n", __func__);
1583 ret = proc_clearhalt(ps, p);
1584 if (ret >= 0)
1585 inode->i_mtime = CURRENT_TIME;
1586 break;
1587
1588 case USBDEVFS_GETDRIVER:
1589 snoop(&dev->dev, "%s: GETDRIVER\n", __func__);
1590 ret = proc_getdriver(ps, p);
1591 break;
1592
1593 case USBDEVFS_CONNECTINFO:
1594 snoop(&dev->dev, "%s: CONNECTINFO\n", __func__);
1595 ret = proc_connectinfo(ps, p);
1596 break;
1597
1598 case USBDEVFS_SETINTERFACE:
1599 snoop(&dev->dev, "%s: SETINTERFACE\n", __func__);
1600 ret = proc_setintf(ps, p);
1601 break;
1602
1603 case USBDEVFS_SETCONFIGURATION:
1604 snoop(&dev->dev, "%s: SETCONFIGURATION\n", __func__);
1605 ret = proc_setconfig(ps, p);
1606 break;
1607
1608 case USBDEVFS_SUBMITURB:
1609 snoop(&dev->dev, "%s: SUBMITURB\n", __func__);
1610 ret = proc_submiturb(ps, p);
1611 if (ret >= 0)
1612 inode->i_mtime = CURRENT_TIME;
1613 break;
1614
1615 #ifdef CONFIG_COMPAT
1616
1617 case USBDEVFS_SUBMITURB32:
1618 snoop(&dev->dev, "%s: SUBMITURB32\n", __func__);
1619 ret = proc_submiturb_compat(ps, p);
1620 if (ret >= 0)
1621 inode->i_mtime = CURRENT_TIME;
1622 break;
1623
1624 case USBDEVFS_REAPURB32:
1625 snoop(&dev->dev, "%s: REAPURB32\n", __func__);
1626 ret = proc_reapurb_compat(ps, p);
1627 break;
1628
1629 case USBDEVFS_REAPURBNDELAY32:
1630 snoop(&dev->dev, "%s: REAPURBDELAY32\n", __func__);
1631 ret = proc_reapurbnonblock_compat(ps, p);
1632 break;
1633
1634 case USBDEVFS_IOCTL32:
1635 snoop(&dev->dev, "%s: IOCTL\n", __func__);
1636 ret = proc_ioctl_compat(ps, ptr_to_compat(p));
1637 break;
1638 #endif
1639
1640 case USBDEVFS_DISCARDURB:
1641 snoop(&dev->dev, "%s: DISCARDURB\n", __func__);
1642 ret = proc_unlinkurb(ps, p);
1643 break;
1644
1645 case USBDEVFS_REAPURB:
1646 snoop(&dev->dev, "%s: REAPURB\n", __func__);
1647 ret = proc_reapurb(ps, p);
1648 break;
1649
1650 case USBDEVFS_REAPURBNDELAY:
1651 snoop(&dev->dev, "%s: REAPURBDELAY\n", __func__);
1652 ret = proc_reapurbnonblock(ps, p);
1653 break;
1654
1655 case USBDEVFS_DISCSIGNAL:
1656 snoop(&dev->dev, "%s: DISCSIGNAL\n", __func__);
1657 ret = proc_disconnectsignal(ps, p);
1658 break;
1659
1660 case USBDEVFS_CLAIMINTERFACE:
1661 snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __func__);
1662 ret = proc_claiminterface(ps, p);
1663 break;
1664
1665 case USBDEVFS_RELEASEINTERFACE:
1666 snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __func__);
1667 ret = proc_releaseinterface(ps, p);
1668 break;
1669
1670 case USBDEVFS_IOCTL:
1671 snoop(&dev->dev, "%s: IOCTL\n", __func__);
1672 ret = proc_ioctl_default(ps, p);
1673 break;
1674 }
1675 usb_unlock_device(dev);
1676 if (ret >= 0)
1677 inode->i_atime = CURRENT_TIME;
1678 return ret;
1679 }
1680
1681 /* No kernel lock - fine */
1682 static unsigned int usbdev_poll(struct file *file,
1683 struct poll_table_struct *wait)
1684 {
1685 struct dev_state *ps = file->private_data;
1686 unsigned int mask = 0;
1687
1688 poll_wait(file, &ps->wait, wait);
1689 if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed))
1690 mask |= POLLOUT | POLLWRNORM;
1691 if (!connected(ps))
1692 mask |= POLLERR | POLLHUP;
1693 return mask;
1694 }
1695
1696 const struct file_operations usbdev_file_operations = {
1697 .owner = THIS_MODULE,
1698 .llseek = usbdev_lseek,
1699 .read = usbdev_read,
1700 .poll = usbdev_poll,
1701 .ioctl = usbdev_ioctl,
1702 .open = usbdev_open,
1703 .release = usbdev_release,
1704 };
1705
1706 void usb_fs_classdev_common_remove(struct usb_device *udev)
1707 {
1708 struct dev_state *ps;
1709 struct siginfo sinfo;
1710
1711 while (!list_empty(&udev->filelist)) {
1712 ps = list_entry(udev->filelist.next, struct dev_state, list);
1713 destroy_all_async(ps);
1714 wake_up_all(&ps->wait);
1715 list_del_init(&ps->list);
1716 if (ps->discsignr) {
1717 sinfo.si_signo = ps->discsignr;
1718 sinfo.si_errno = EPIPE;
1719 sinfo.si_code = SI_ASYNCIO;
1720 sinfo.si_addr = ps->disccontext;
1721 kill_pid_info_as_uid(ps->discsignr, &sinfo,
1722 ps->disc_pid, ps->disc_uid,
1723 ps->disc_euid, ps->secid);
1724 }
1725 }
1726 }
1727
1728 #ifdef CONFIG_USB_DEVICE_CLASS
1729 static struct class *usb_classdev_class;
1730
1731 static int usb_classdev_add(struct usb_device *dev)
1732 {
1733 struct device *cldev;
1734
1735 cldev = device_create(usb_classdev_class, &dev->dev, dev->dev.devt,
1736 NULL, "usbdev%d.%d", dev->bus->busnum,
1737 dev->devnum);
1738 if (IS_ERR(cldev))
1739 return PTR_ERR(cldev);
1740 dev->usb_classdev = cldev;
1741 return 0;
1742 }
1743
1744 static void usb_classdev_remove(struct usb_device *dev)
1745 {
1746 if (dev->usb_classdev)
1747 device_unregister(dev->usb_classdev);
1748 usb_fs_classdev_common_remove(dev);
1749 }
1750
1751 static int usb_classdev_notify(struct notifier_block *self,
1752 unsigned long action, void *dev)
1753 {
1754 switch (action) {
1755 case USB_DEVICE_ADD:
1756 if (usb_classdev_add(dev))
1757 return NOTIFY_BAD;
1758 break;
1759 case USB_DEVICE_REMOVE:
1760 usb_classdev_remove(dev);
1761 break;
1762 }
1763 return NOTIFY_OK;
1764 }
1765
1766 static struct notifier_block usbdev_nb = {
1767 .notifier_call = usb_classdev_notify,
1768 };
1769 #endif
1770
1771 static struct cdev usb_device_cdev;
1772
1773 int __init usb_devio_init(void)
1774 {
1775 int retval;
1776
1777 retval = register_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX,
1778 "usb_device");
1779 if (retval) {
1780 printk(KERN_ERR "Unable to register minors for usb_device\n");
1781 goto out;
1782 }
1783 cdev_init(&usb_device_cdev, &usbdev_file_operations);
1784 retval = cdev_add(&usb_device_cdev, USB_DEVICE_DEV, USB_DEVICE_MAX);
1785 if (retval) {
1786 printk(KERN_ERR "Unable to get usb_device major %d\n",
1787 USB_DEVICE_MAJOR);
1788 goto error_cdev;
1789 }
1790 #ifdef CONFIG_USB_DEVICE_CLASS
1791 usb_classdev_class = class_create(THIS_MODULE, "usb_device");
1792 if (IS_ERR(usb_classdev_class)) {
1793 printk(KERN_ERR "Unable to register usb_device class\n");
1794 retval = PTR_ERR(usb_classdev_class);
1795 cdev_del(&usb_device_cdev);
1796 usb_classdev_class = NULL;
1797 goto out;
1798 }
1799 /* devices of this class shadow the major:minor of their parent
1800 * device, so clear ->dev_kobj to prevent adding duplicate entries
1801 * to /sys/dev
1802 */
1803 usb_classdev_class->dev_kobj = NULL;
1804
1805 usb_register_notify(&usbdev_nb);
1806 #endif
1807 out:
1808 return retval;
1809
1810 error_cdev:
1811 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
1812 goto out;
1813 }
1814
1815 void usb_devio_cleanup(void)
1816 {
1817 #ifdef CONFIG_USB_DEVICE_CLASS
1818 usb_unregister_notify(&usbdev_nb);
1819 class_destroy(usb_classdev_class);
1820 #endif
1821 cdev_del(&usb_device_cdev);
1822 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
1823 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree