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[PATCH] USB: add notifier functions to the USB core for devices and busses
[mirror_ubuntu-zesty-kernel.git] / drivers / usb / core / devio.c
CommitLineData
1da177e4
LT		 1/*****************************************************************************/
2
3/*
4 * devio.c -- User space communication with USB devices.
5 *
6 * Copyright (C) 1999-2000 Thomas Sailer (sailer@ife.ee.ethz.ch)
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 *
22 * $Id: devio.c,v 1.7 2000/02/01 17:28:48 fliegl Exp $
23 *
24 * This file implements the usbfs/x/y files, where
25 * x is the bus number and y the device number.
26 *
27 * It allows user space programs/"drivers" to communicate directly
28 * with USB devices without intervening kernel driver.
29 *
30 * Revision history
31 * 22.12.1999 0.1 Initial release (split from proc_usb.c)
32 * 04.01.2000 0.2 Turned into its own filesystem
46113830
HW		 33 * 30.09.2005 0.3 Fix user-triggerable oops in async URB delivery
34 * (CAN-2005-3055)
1da177e4
LT		 35 */
36
37/*****************************************************************************/
38
39#include <linux/fs.h>
40#include <linux/mm.h>
41#include <linux/slab.h>
42#include <linux/smp_lock.h>
43#include <linux/signal.h>
44#include <linux/poll.h>
45#include <linux/module.h>
46#include <linux/usb.h>
47#include <linux/usbdevice_fs.h>
fbf82fd2 48#include <linux/cdev.h>
1da177e4
LT		 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
fbf82fd2
KS		 56#define USB_MAXBUS 64
57#define USB_DEVICE_MAX USB_MAXBUS * 128
58static struct class *usb_device_class;
59
1da177e4
LT		 60struct async {
61 struct list_head asynclist;
62 struct dev_state *ps;
46113830
HW		 63 pid_t pid;
64 uid_t uid, euid;
1da177e4
LT		 65 unsigned int signr;
66 unsigned int ifnum;
67 void __user *userbuffer;
68 void __user *userurb;
69 struct urb *urb;
70};
71
72static int usbfs_snoop = 0;
73module_param (usbfs_snoop, bool, S_IRUGO | S_IWUSR);
74MODULE_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
fad21bdf
AS		 82#define USB_DEVICE_DEV MKDEV(USB_DEVICE_MAJOR, 0)
83
1da177e4
LT		 84
85#define MAX_USBFS_BUFFER_SIZE 16384
86
87static inline int connected (struct usb_device *dev)
88{
89 return dev->state != USB_STATE_NOTATTACHED;
90}
91
92static 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
116static 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
200err:
201 usb_unlock_device(dev);
202 return ret;
203}
204
205/*
206 * async list handling
207 */
208
209static 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
224static void free_async(struct async *as)
225{
6fd19f4b
JJ		 226 kfree(as->urb->transfer_buffer);
227 kfree(as->urb->setup_packet);
1da177e4 228 usb_free_urb(as->urb);
6fd19f4b 229 kfree(as);
1da177e4
LT		 230}
231
232static 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
242static 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
252static 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
266static 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
e639dd3f
GKH		 282static void snoop_urb(struct urb *urb, void __user *userurb)
283{
284 int j;
285 unsigned char *data = urb->transfer_buffer;
286
287 if (!usbfs_snoop)
288 return;
289
290 if (urb->pipe & USB_DIR_IN)
291 dev_info(&urb->dev->dev, "direction=IN\n");
292 else
293 dev_info(&urb->dev->dev, "direction=OUT\n");
294 dev_info(&urb->dev->dev, "userurb=%p\n", userurb);
295 dev_info(&urb->dev->dev, "transfer_buffer_length=%d\n",
296 urb->transfer_buffer_length);
297 dev_info(&urb->dev->dev, "actual_length=%d\n", urb->actual_length);
298 dev_info(&urb->dev->dev, "data: ");
299 for (j = 0; j < urb->transfer_buffer_length; ++j)
300 printk ("%02x ", data[j]);
301 printk("\n");
302}
303
1da177e4
LT		 304static void async_completed(struct urb *urb, struct pt_regs *regs)
305{
306 struct async *as = (struct async *)urb->context;
307 struct dev_state *ps = as->ps;
308 struct siginfo sinfo;
309
310 spin_lock(&ps->lock);
311 list_move_tail(&as->asynclist, &ps->async_completed);
312 spin_unlock(&ps->lock);
313 if (as->signr) {
314 sinfo.si_signo = as->signr;
315 sinfo.si_errno = as->urb->status;
316 sinfo.si_code = SI_ASYNCIO;
317 sinfo.si_addr = as->userurb;
46113830
HW		 318 kill_proc_info_as_uid(as->signr, &sinfo, as->pid, as->uid,
319 as->euid);
1da177e4 320 }
e639dd3f
GKH		 321 snoop(&urb->dev->dev, "urb complete\n");
322 snoop_urb(urb, as->userurb);
323 wake_up(&ps->wait);
1da177e4
LT		 324}
325
326static void destroy_async (struct dev_state *ps, struct list_head *list)
327{
328 struct async *as;
329 unsigned long flags;
330
331 spin_lock_irqsave(&ps->lock, flags);
332 while (!list_empty(list)) {
333 as = list_entry(list->next, struct async, asynclist);
334 list_del_init(&as->asynclist);
335
336 /* drop the spinlock so the completion handler can run */
337 spin_unlock_irqrestore(&ps->lock, flags);
338 usb_kill_urb(as->urb);
339 spin_lock_irqsave(&ps->lock, flags);
340 }
341 spin_unlock_irqrestore(&ps->lock, flags);
342 as = async_getcompleted(ps);
343 while (as) {
344 free_async(as);
345 as = async_getcompleted(ps);
346 }
347}
348
349static void destroy_async_on_interface (struct dev_state *ps, unsigned int ifnum)
350{
351 struct list_head *p, *q, hitlist;
352 unsigned long flags;
353
354 INIT_LIST_HEAD(&hitlist);
355 spin_lock_irqsave(&ps->lock, flags);
356 list_for_each_safe(p, q, &ps->async_pending)
357 if (ifnum == list_entry(p, struct async, asynclist)->ifnum)
358 list_move_tail(p, &hitlist);
359 spin_unlock_irqrestore(&ps->lock, flags);
360 destroy_async(ps, &hitlist);
361}
362
363static inline void destroy_all_async(struct dev_state *ps)
364{
365 destroy_async(ps, &ps->async_pending);
366}
367
368/*
369 * interface claims are made only at the request of user level code,
370 * which can also release them (explicitly or by closing files).
371 * they're also undone when devices disconnect.
372 */
373
374static int driver_probe (struct usb_interface *intf,
375 const struct usb_device_id *id)
376{
377 return -ENODEV;
378}
379
380static void driver_disconnect(struct usb_interface *intf)
381{
382 struct dev_state *ps = usb_get_intfdata (intf);
383 unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber;
384
385 if (!ps)
386 return;
387
388 /* NOTE: this relies on usbcore having canceled and completed
389 * all pending I/O requests; 2.6 does that.
390 */
391
392 if (likely(ifnum < 8*sizeof(ps->ifclaimed)))
393 clear_bit(ifnum, &ps->ifclaimed);
394 else
395 warn("interface number %u out of range", ifnum);
396
397 usb_set_intfdata (intf, NULL);
398
399 /* force async requests to complete */
400 destroy_async_on_interface(ps, ifnum);
401}
402
403struct usb_driver usbfs_driver = {
404 .owner = THIS_MODULE,
405 .name = "usbfs",
406 .probe = driver_probe,
407 .disconnect = driver_disconnect,
408};
409
410static int claimintf(struct dev_state *ps, unsigned int ifnum)
411{
412 struct usb_device *dev = ps->dev;
413 struct usb_interface *intf;
414 int err;
415
416 if (ifnum >= 8*sizeof(ps->ifclaimed))
417 return -EINVAL;
418 /* already claimed */
419 if (test_bit(ifnum, &ps->ifclaimed))
420 return 0;
421
422 /* lock against other changes to driver bindings */
423 down_write(&usb_bus_type.subsys.rwsem);
424 intf = usb_ifnum_to_if(dev, ifnum);
425 if (!intf)
426 err = -ENOENT;
427 else
428 err = usb_driver_claim_interface(&usbfs_driver, intf, ps);
429 up_write(&usb_bus_type.subsys.rwsem);
430 if (err == 0)
431 set_bit(ifnum, &ps->ifclaimed);
432 return err;
433}
434
435static int releaseintf(struct dev_state *ps, unsigned int ifnum)
436{
437 struct usb_device *dev;
438 struct usb_interface *intf;
439 int err;
440
441 err = -EINVAL;
442 if (ifnum >= 8*sizeof(ps->ifclaimed))
443 return err;
444 dev = ps->dev;
445 /* lock against other changes to driver bindings */
446 down_write(&usb_bus_type.subsys.rwsem);
447 intf = usb_ifnum_to_if(dev, ifnum);
448 if (!intf)
449 err = -ENOENT;
450 else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) {
451 usb_driver_release_interface(&usbfs_driver, intf);
452 err = 0;
453 }
454 up_write(&usb_bus_type.subsys.rwsem);
455 return err;
456}
457
458static int checkintf(struct dev_state *ps, unsigned int ifnum)
459{
460 if (ps->dev->state != USB_STATE_CONFIGURED)
461 return -EHOSTUNREACH;
462 if (ifnum >= 8*sizeof(ps->ifclaimed))
463 return -EINVAL;
464 if (test_bit(ifnum, &ps->ifclaimed))
465 return 0;
466 /* if not yet claimed, claim it for the driver */
467 dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim interface %u before use\n",
468 current->pid, current->comm, ifnum);
469 return claimintf(ps, ifnum);
470}
471
472static int findintfep(struct usb_device *dev, unsigned int ep)
473{
474 unsigned int i, j, e;
475 struct usb_interface *intf;
476 struct usb_host_interface *alts;
477 struct usb_endpoint_descriptor *endpt;
478
479 if (ep & ~(USB_DIR_IN|0xf))
480 return -EINVAL;
481 if (!dev->actconfig)
482 return -ESRCH;
483 for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) {
484 intf = dev->actconfig->interface[i];
485 for (j = 0; j < intf->num_altsetting; j++) {
486 alts = &intf->altsetting[j];
487 for (e = 0; e < alts->desc.bNumEndpoints; e++) {
488 endpt = &alts->endpoint[e].desc;
489 if (endpt->bEndpointAddress == ep)
490 return alts->desc.bInterfaceNumber;
491 }
492 }
493 }
494 return -ENOENT;
495}
496
497static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype, unsigned int index)
498{
499 int ret = 0;
500
501 if (ps->dev->state != USB_STATE_CONFIGURED)
502 return -EHOSTUNREACH;
503 if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype))
504 return 0;
505
506 index &= 0xff;
507 switch (requesttype & USB_RECIP_MASK) {
508 case USB_RECIP_ENDPOINT:
509 if ((ret = findintfep(ps->dev, index)) >= 0)
510 ret = checkintf(ps, ret);
511 break;
512
513 case USB_RECIP_INTERFACE:
514 ret = checkintf(ps, index);
515 break;
516 }
517 return ret;
518}
519
4592bf5a
GKH		 520static struct usb_device *usbdev_lookup_minor(int minor)
521{
522 struct class_device *class_dev;
523 struct usb_device *dev = NULL;
524
525 down(&usb_device_class->sem);
526 list_for_each_entry(class_dev, &usb_device_class->children, node) {
527 if (class_dev->devt == MKDEV(USB_DEVICE_MAJOR, minor)) {
528 dev = class_dev->class_data;
529 break;
530 }
531 }
532 up(&usb_device_class->sem);
533
534 return dev;
535};
536
1da177e4
LT		 537/*
538 * file operations
539 */
540static int usbdev_open(struct inode *inode, struct file *file)
541{
fbf82fd2 542 struct usb_device *dev = NULL;
1da177e4
LT		 543 struct dev_state *ps;
544 int ret;
545
546 /*
547 * no locking necessary here, as chrdev_open has the kernel lock
548 * (still acquire the kernel lock for safety)
549 */
550 ret = -ENOMEM;
551 if (!(ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL)))
552 goto out_nolock;
553
554 lock_kernel();
555 ret = -ENOENT;
fbf82fd2
KS		 556 /* check if we are called from a real node or usbfs */
557 if (imajor(inode) == USB_DEVICE_MAJOR)
558 dev = usbdev_lookup_minor(iminor(inode));
559 if (!dev)
560 dev = inode->u.generic_ip;
1da177e4
LT		 561 if (!dev) {
562 kfree(ps);
563 goto out;
564 }
fbf82fd2 565 usb_get_dev(dev);
1da177e4
LT		 566 ret = 0;
567 ps->dev = dev;
568 ps->file = file;
569 spin_lock_init(&ps->lock);
570 INIT_LIST_HEAD(&ps->async_pending);
571 INIT_LIST_HEAD(&ps->async_completed);
572 init_waitqueue_head(&ps->wait);
573 ps->discsignr = 0;
d7dd8a72
LT		 574 ps->disc_pid = current->pid;
575 ps->disc_uid = current->uid;
576 ps->disc_euid = current->euid;
1da177e4
LT		 577 ps->disccontext = NULL;
578 ps->ifclaimed = 0;
579 wmb();
580 list_add_tail(&ps->list, &dev->filelist);
581 file->private_data = ps;
582 out:
583 unlock_kernel();
584 out_nolock:
585 return ret;
586}
587
588static int usbdev_release(struct inode *inode, struct file *file)
589{
590 struct dev_state *ps = (struct dev_state *)file->private_data;
591 struct usb_device *dev = ps->dev;
592 unsigned int ifnum;
593
594 usb_lock_device(dev);
595 list_del_init(&ps->list);
596 for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed);
597 ifnum++) {
598 if (test_bit(ifnum, &ps->ifclaimed))
599 releaseintf(ps, ifnum);
600 }
601 destroy_all_async(ps);
602 usb_unlock_device(dev);
603 usb_put_dev(dev);
604 ps->dev = NULL;
605 kfree(ps);
606 return 0;
607}
608
609static int proc_control(struct dev_state *ps, void __user *arg)
610{
611 struct usb_device *dev = ps->dev;
612 struct usbdevfs_ctrltransfer ctrl;
613 unsigned int tmo;
614 unsigned char *tbuf;
615 int i, j, ret;
616
617 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
618 return -EFAULT;
619 if ((ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.wIndex)))
620 return ret;
621 if (ctrl.wLength > PAGE_SIZE)
622 return -EINVAL;
623 if (!(tbuf = (unsigned char *)__get_free_page(GFP_KERNEL)))
624 return -ENOMEM;
625 tmo = ctrl.timeout;
626 if (ctrl.bRequestType & 0x80) {
627 if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data, ctrl.wLength)) {
628 free_page((unsigned long)tbuf);
629 return -EINVAL;
630 }
fe0410c7
AS		 631 snoop(&dev->dev, "control read: bRequest=%02x "
632 "bRrequestType=%02x wValue=%04x "
633 "wIndex=%04x wLength=%04x\n",
634 ctrl.bRequest, ctrl.bRequestType, ctrl.wValue,
635 ctrl.wIndex, ctrl.wLength);
1da177e4
LT		 636
637 usb_unlock_device(dev);
638 i = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType,
639 ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo);
640 usb_lock_device(dev);
641 if ((i > 0) && ctrl.wLength) {
642 if (usbfs_snoop) {
643 dev_info(&dev->dev, "control read: data ");
fe0410c7 644 for (j = 0; j < i; ++j)
e639dd3f 645 printk("%02x ", (unsigned char)(tbuf)[j]);
1da177e4
LT		 646 printk("\n");
647 }
fe0410c7 648 if (copy_to_user(ctrl.data, tbuf, i)) {
1da177e4
LT		 649 free_page((unsigned long)tbuf);
650 return -EFAULT;
651 }
652 }
653 } else {
654 if (ctrl.wLength) {
655 if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) {
656 free_page((unsigned long)tbuf);
657 return -EFAULT;
658 }
659 }
fe0410c7
AS		 660 snoop(&dev->dev, "control write: bRequest=%02x "
661 "bRrequestType=%02x wValue=%04x "
662 "wIndex=%04x wLength=%04x\n",
663 ctrl.bRequest, ctrl.bRequestType, ctrl.wValue,
664 ctrl.wIndex, ctrl.wLength);
1da177e4
LT		 665 if (usbfs_snoop) {
666 dev_info(&dev->dev, "control write: data: ");
667 for (j = 0; j < ctrl.wLength; ++j)
e639dd3f 668 printk("%02x ", (unsigned char)(tbuf)[j]);
1da177e4
LT		 669 printk("\n");
670 }
671 usb_unlock_device(dev);
672 i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType,
673 ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo);
674 usb_lock_device(dev);
675 }
676 free_page((unsigned long)tbuf);
677 if (i<0 && i != -EPIPE) {
678 dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL "
679 "failed cmd %s rqt %u rq %u len %u ret %d\n",
680 current->comm, ctrl.bRequestType, ctrl.bRequest,
681 ctrl.wLength, i);
682 }
683 return i;
684}
685
686static int proc_bulk(struct dev_state *ps, void __user *arg)
687{
688 struct usb_device *dev = ps->dev;
689 struct usbdevfs_bulktransfer bulk;
690 unsigned int tmo, len1, pipe;
691 int len2;
692 unsigned char *tbuf;
e639dd3f 693 int i, j, ret;
1da177e4
LT		 694
695 if (copy_from_user(&bulk, arg, sizeof(bulk)))
696 return -EFAULT;
697 if ((ret = findintfep(ps->dev, bulk.ep)) < 0)
698 return ret;
699 if ((ret = checkintf(ps, ret)))
700 return ret;
701 if (bulk.ep & USB_DIR_IN)
702 pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f);
703 else
704 pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f);
705 if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN)))
706 return -EINVAL;
707 len1 = bulk.len;
708 if (len1 > MAX_USBFS_BUFFER_SIZE)
709 return -EINVAL;
710 if (!(tbuf = kmalloc(len1, GFP_KERNEL)))
711 return -ENOMEM;
712 tmo = bulk.timeout;
713 if (bulk.ep & 0x80) {
714 if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) {
715 kfree(tbuf);
716 return -EINVAL;
717 }
e639dd3f
GKH		 718 snoop(&dev->dev, "bulk read: len=0x%02x timeout=%04d\n",
719 bulk.len, bulk.timeout);
1da177e4
LT		 720 usb_unlock_device(dev);
721 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
722 usb_lock_device(dev);
723 if (!i && len2) {
e639dd3f
GKH		 724 if (usbfs_snoop) {
725 dev_info(&dev->dev, "bulk read: data ");
726 for (j = 0; j < len2; ++j)
727 printk("%02x ", (unsigned char)(tbuf)[j]);
728 printk("\n");
729 }
1da177e4
LT		 730 if (copy_to_user(bulk.data, tbuf, len2)) {
731 kfree(tbuf);
732 return -EFAULT;
733 }
734 }
735 } else {
736 if (len1) {
737 if (copy_from_user(tbuf, bulk.data, len1)) {
738 kfree(tbuf);
739 return -EFAULT;
740 }
741 }
e639dd3f
GKH		 742 snoop(&dev->dev, "bulk write: len=0x%02x timeout=%04d\n",
743 bulk.len, bulk.timeout);
744 if (usbfs_snoop) {
745 dev_info(&dev->dev, "bulk write: data: ");
746 for (j = 0; j < len1; ++j)
747 printk("%02x ", (unsigned char)(tbuf)[j]);
748 printk("\n");
749 }
1da177e4
LT		 750 usb_unlock_device(dev);
751 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
752 usb_lock_device(dev);
753 }
754 kfree(tbuf);
755 if (i < 0)
756 return i;
757 return len2;
758}
759
760static int proc_resetep(struct dev_state *ps, void __user *arg)
761{
762 unsigned int ep;
763 int ret;
764
765 if (get_user(ep, (unsigned int __user *)arg))
766 return -EFAULT;
767 if ((ret = findintfep(ps->dev, ep)) < 0)
768 return ret;
769 if ((ret = checkintf(ps, ret)))
770 return ret;
771 usb_settoggle(ps->dev, ep & 0xf, !(ep & USB_DIR_IN), 0);
772 return 0;
773}
774
775static int proc_clearhalt(struct dev_state *ps, void __user *arg)
776{
777 unsigned int ep;
778 int pipe;
779 int ret;
780
781 if (get_user(ep, (unsigned int __user *)arg))
782 return -EFAULT;
783 if ((ret = findintfep(ps->dev, ep)) < 0)
784 return ret;
785 if ((ret = checkintf(ps, ret)))
786 return ret;
787 if (ep & USB_DIR_IN)
788 pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f);
789 else
790 pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f);
791
792 return usb_clear_halt(ps->dev, pipe);
793}
794
795
796static int proc_getdriver(struct dev_state *ps, void __user *arg)
797{
798 struct usbdevfs_getdriver gd;
799 struct usb_interface *intf;
800 int ret;
801
802 if (copy_from_user(&gd, arg, sizeof(gd)))
803 return -EFAULT;
804 down_read(&usb_bus_type.subsys.rwsem);
805 intf = usb_ifnum_to_if(ps->dev, gd.interface);
806 if (!intf || !intf->dev.driver)
807 ret = -ENODATA;
808 else {
809 strncpy(gd.driver, intf->dev.driver->name,
810 sizeof(gd.driver));
811 ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0);
812 }
813 up_read(&usb_bus_type.subsys.rwsem);
814 return ret;
815}
816
817static int proc_connectinfo(struct dev_state *ps, void __user *arg)
818{
819 struct usbdevfs_connectinfo ci;
820
821 ci.devnum = ps->dev->devnum;
822 ci.slow = ps->dev->speed == USB_SPEED_LOW;
823 if (copy_to_user(arg, &ci, sizeof(ci)))
824 return -EFAULT;
825 return 0;
826}
827
828static int proc_resetdevice(struct dev_state *ps)
829{
830 return usb_reset_device(ps->dev);
831
832}
833
834static int proc_setintf(struct dev_state *ps, void __user *arg)
835{
836 struct usbdevfs_setinterface setintf;
837 int ret;
838
839 if (copy_from_user(&setintf, arg, sizeof(setintf)))
840 return -EFAULT;
841 if ((ret = checkintf(ps, setintf.interface)))
842 return ret;
843 return usb_set_interface(ps->dev, setintf.interface,
844 setintf.altsetting);
845}
846
847static int proc_setconfig(struct dev_state *ps, void __user *arg)
848{
849 unsigned int u;
850 int status = 0;
851 struct usb_host_config *actconfig;
852
853 if (get_user(u, (unsigned int __user *)arg))
854 return -EFAULT;
855
856 actconfig = ps->dev->actconfig;
857
858 /* Don't touch the device if any interfaces are claimed.
859 * It could interfere with other drivers' operations, and if
860 * an interface is claimed by usbfs it could easily deadlock.
861 */
862 if (actconfig) {
863 int i;
864
865 for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) {
866 if (usb_interface_claimed(actconfig->interface[i])) {
867 dev_warn (&ps->dev->dev,
72ebddb5 868 "usbfs: interface %d claimed by %s "
1da177e4
LT		 869 "while '%s' sets config #%d\n",
870 actconfig->interface[i]
871 ->cur_altsetting
872 ->desc.bInterfaceNumber,
72ebddb5
DB		 873 actconfig->interface[i]
874 ->dev.driver->name,
1da177e4 875 current->comm, u);
1da177e4
LT		 876 status = -EBUSY;
877 break;
1da177e4
LT		 878 }
879 }
880 }
881
882 /* SET_CONFIGURATION is often abused as a "cheap" driver reset,
883 * so avoid usb_set_configuration()'s kick to sysfs
884 */
885 if (status == 0) {
886 if (actconfig && actconfig->desc.bConfigurationValue == u)
887 status = usb_reset_configuration(ps->dev);
888 else
889 status = usb_set_configuration(ps->dev, u);
890 }
891
892 return status;
893}
894
1da177e4
LT		 895static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
896 struct usbdevfs_iso_packet_desc __user *iso_frame_desc,
897 void __user *arg)
898{
899 struct usbdevfs_iso_packet_desc *isopkt = NULL;
900 struct usb_host_endpoint *ep;
901 struct async *as;
902 struct usb_ctrlrequest *dr = NULL;
903 unsigned int u, totlen, isofrmlen;
904 int ret, interval = 0, ifnum = -1;
905
906 if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP|USBDEVFS_URB_SHORT_NOT_OK|
907 URB_NO_FSBR|URB_ZERO_PACKET))
908 return -EINVAL;
909 if (!uurb->buffer)
910 return -EINVAL;
911 if (uurb->signr != 0 && (uurb->signr < SIGRTMIN || uurb->signr > SIGRTMAX))
912 return -EINVAL;
913 if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL && (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) {
914 if ((ifnum = findintfep(ps->dev, uurb->endpoint)) < 0)
915 return ifnum;
916 if ((ret = checkintf(ps, ifnum)))
917 return ret;
918 }
919 if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0)
920 ep = ps->dev->ep_in [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
921 else
922 ep = ps->dev->ep_out [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
923 if (!ep)
924 return -ENOENT;
925 switch(uurb->type) {
926 case USBDEVFS_URB_TYPE_CONTROL:
927 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
928 != USB_ENDPOINT_XFER_CONTROL)
929 return -EINVAL;
930 /* min 8 byte setup packet, max arbitrary */
931 if (uurb->buffer_length < 8 || uurb->buffer_length > PAGE_SIZE)
932 return -EINVAL;
933 if (!(dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL)))
934 return -ENOMEM;
935 if (copy_from_user(dr, uurb->buffer, 8)) {
936 kfree(dr);
937 return -EFAULT;
938 }
939 if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) {
940 kfree(dr);
941 return -EINVAL;
942 }
943 if ((ret = check_ctrlrecip(ps, dr->bRequestType, le16_to_cpup(&dr->wIndex)))) {
944 kfree(dr);
945 return ret;
946 }
947 uurb->endpoint = (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) | (dr->bRequestType & USB_ENDPOINT_DIR_MASK);
948 uurb->number_of_packets = 0;
949 uurb->buffer_length = le16_to_cpup(&dr->wLength);
950 uurb->buffer += 8;
951 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) {
952 kfree(dr);
953 return -EFAULT;
954 }
e639dd3f 955 snoop(&ps->dev->dev, "control urb\n");
1da177e4
LT		 956 break;
957
958 case USBDEVFS_URB_TYPE_BULK:
959 switch (ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
960 case USB_ENDPOINT_XFER_CONTROL:
961 case USB_ENDPOINT_XFER_ISOC:
962 return -EINVAL;
963 /* allow single-shot interrupt transfers, at bogus rates */
964 }
965 uurb->number_of_packets = 0;
966 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE)
967 return -EINVAL;
968 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length))
969 return -EFAULT;
e639dd3f 970 snoop(&ps->dev->dev, "bulk urb\n");
1da177e4
LT		 971 break;
972
973 case USBDEVFS_URB_TYPE_ISO:
974 /* arbitrary limit */
975 if (uurb->number_of_packets < 1 || uurb->number_of_packets > 128)
976 return -EINVAL;
977 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
978 != USB_ENDPOINT_XFER_ISOC)
979 return -EINVAL;
980 interval = 1 << min (15, ep->desc.bInterval - 1);
981 isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * uurb->number_of_packets;
982 if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL)))
983 return -ENOMEM;
984 if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) {
985 kfree(isopkt);
986 return -EFAULT;
987 }
988 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
989 if (isopkt[u].length > 1023) {
990 kfree(isopkt);
991 return -EINVAL;
992 }
993 totlen += isopkt[u].length;
994 }
995 if (totlen > 32768) {
996 kfree(isopkt);
997 return -EINVAL;
998 }
999 uurb->buffer_length = totlen;
e639dd3f 1000 snoop(&ps->dev->dev, "iso urb\n");
1da177e4
LT		 1001 break;
1002
1003 case USBDEVFS_URB_TYPE_INTERRUPT:
1004 uurb->number_of_packets = 0;
1005 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
1006 != USB_ENDPOINT_XFER_INT)
1007 return -EINVAL;
1008 if (ps->dev->speed == USB_SPEED_HIGH)
1009 interval = 1 << min (15, ep->desc.bInterval - 1);
1010 else
1011 interval = ep->desc.bInterval;
1012 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE)
1013 return -EINVAL;
1014 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length))
1015 return -EFAULT;
e639dd3f 1016 snoop(&ps->dev->dev, "interrupt urb\n");
1da177e4
LT		 1017 break;
1018
1019 default:
1020 return -EINVAL;
1021 }
1022 if (!(as = alloc_async(uurb->number_of_packets))) {
6fd19f4b
JJ		 1023 kfree(isopkt);
1024 kfree(dr);
1da177e4
LT		 1025 return -ENOMEM;
1026 }
1027 if (!(as->urb->transfer_buffer = kmalloc(uurb->buffer_length, GFP_KERNEL))) {
6fd19f4b
JJ		 1028 kfree(isopkt);
1029 kfree(dr);
1da177e4
LT		 1030 free_async(as);
1031 return -ENOMEM;
1032 }
1033 as->urb->dev = ps->dev;
1034 as->urb->pipe = (uurb->type << 30) | __create_pipe(ps->dev, uurb->endpoint & 0xf) | (uurb->endpoint & USB_DIR_IN);
1035 as->urb->transfer_flags = uurb->flags;
1036 as->urb->transfer_buffer_length = uurb->buffer_length;
1037 as->urb->setup_packet = (unsigned char*)dr;
1038 as->urb->start_frame = uurb->start_frame;
1039 as->urb->number_of_packets = uurb->number_of_packets;
1040 as->urb->interval = interval;
1041 as->urb->context = as;
1042 as->urb->complete = async_completed;
1043 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
1044 as->urb->iso_frame_desc[u].offset = totlen;
1045 as->urb->iso_frame_desc[u].length = isopkt[u].length;
1046 totlen += isopkt[u].length;
1047 }
6fd19f4b 1048 kfree(isopkt);
1da177e4
LT		 1049 as->ps = ps;
1050 as->userurb = arg;
1051 if (uurb->endpoint & USB_DIR_IN)
1052 as->userbuffer = uurb->buffer;
1053 else
1054 as->userbuffer = NULL;
1055 as->signr = uurb->signr;
1056 as->ifnum = ifnum;
46113830
HW		 1057 as->pid = current->pid;
1058 as->uid = current->uid;
1059 as->euid = current->euid;
1da177e4
LT		 1060 if (!(uurb->endpoint & USB_DIR_IN)) {
1061 if (copy_from_user(as->urb->transfer_buffer, uurb->buffer, as->urb->transfer_buffer_length)) {
1062 free_async(as);
1063 return -EFAULT;
1064 }
1065 }
e639dd3f
GKH		 1066 snoop(&as->urb->dev->dev, "submit urb\n");
1067 snoop_urb(as->urb, as->userurb);
1da177e4
LT		 1068 async_newpending(as);
1069 if ((ret = usb_submit_urb(as->urb, GFP_KERNEL))) {
1070 dev_printk(KERN_DEBUG, &ps->dev->dev, "usbfs: usb_submit_urb returned %d\n", ret);
1071 async_removepending(as);
1072 free_async(as);
1073 return ret;
1074 }
1075 return 0;
1076}
1077
1078static int proc_submiturb(struct dev_state *ps, void __user *arg)
1079{
1080 struct usbdevfs_urb uurb;
1081
1082 if (copy_from_user(&uurb, arg, sizeof(uurb)))
1083 return -EFAULT;
1084
1085 return proc_do_submiturb(ps, &uurb, (((struct usbdevfs_urb __user *)arg)->iso_frame_desc), arg);
1086}
1087
1088static int proc_unlinkurb(struct dev_state *ps, void __user *arg)
1089{
1090 struct async *as;
1091
1092 as = async_getpending(ps, arg);
1093 if (!as)
1094 return -EINVAL;
1095 usb_kill_urb(as->urb);
1096 return 0;
1097}
1098
1099static int processcompl(struct async *as, void __user * __user *arg)
1100{
1101 struct urb *urb = as->urb;
1102 struct usbdevfs_urb __user *userurb = as->userurb;
1103 void __user *addr = as->userurb;
1104 unsigned int i;
1105
1106 if (as->userbuffer)
1107 if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length))
1108 return -EFAULT;
1109 if (put_user(urb->status, &userurb->status))
1110 return -EFAULT;
1111 if (put_user(urb->actual_length, &userurb->actual_length))
1112 return -EFAULT;
1113 if (put_user(urb->error_count, &userurb->error_count))
1114 return -EFAULT;
1115
668a9541
CL		 1116 if (usb_pipeisoc(urb->pipe)) {
1117 for (i = 0; i < urb->number_of_packets; i++) {
1118 if (put_user(urb->iso_frame_desc[i].actual_length,
1119 &userurb->iso_frame_desc[i].actual_length))
1120 return -EFAULT;
1121 if (put_user(urb->iso_frame_desc[i].status,
1122 &userurb->iso_frame_desc[i].status))
1123 return -EFAULT;
1124 }
1da177e4
LT		 1125 }
1126
1127 free_async(as);
1128
1129 if (put_user(addr, (void __user * __user *)arg))
1130 return -EFAULT;
1131 return 0;
1132}
1133
1134static struct async* reap_as(struct dev_state *ps)
1135{
1136 DECLARE_WAITQUEUE(wait, current);
1137 struct async *as = NULL;
1138 struct usb_device *dev = ps->dev;
1139
1140 add_wait_queue(&ps->wait, &wait);
1141 for (;;) {
1142 __set_current_state(TASK_INTERRUPTIBLE);
1143 if ((as = async_getcompleted(ps)))
1144 break;
1145 if (signal_pending(current))
1146 break;
1147 usb_unlock_device(dev);
1148 schedule();
1149 usb_lock_device(dev);
1150 }
1151 remove_wait_queue(&ps->wait, &wait);
1152 set_current_state(TASK_RUNNING);
1153 return as;
1154}
1155
1156static int proc_reapurb(struct dev_state *ps, void __user *arg)
1157{
1158 struct async *as = reap_as(ps);
1159 if (as)
1160 return processcompl(as, (void __user * __user *)arg);
1161 if (signal_pending(current))
1162 return -EINTR;
1163 return -EIO;
1164}
1165
1166static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg)
1167{
1168 struct async *as;
1169
1170 if (!(as = async_getcompleted(ps)))
1171 return -EAGAIN;
1172 return processcompl(as, (void __user * __user *)arg);
1173}
1174
1175#ifdef CONFIG_COMPAT
1176
1177static int get_urb32(struct usbdevfs_urb *kurb,
1178 struct usbdevfs_urb32 __user *uurb)
1179{
1180 __u32 uptr;
1181 if (get_user(kurb->type, &uurb->type) ||
1182 __get_user(kurb->endpoint, &uurb->endpoint) ||
1183 __get_user(kurb->status, &uurb->status) ||
1184 __get_user(kurb->flags, &uurb->flags) ||
1185 __get_user(kurb->buffer_length, &uurb->buffer_length) ||
1186 __get_user(kurb->actual_length, &uurb->actual_length) ||
1187 __get_user(kurb->start_frame, &uurb->start_frame) ||
1188 __get_user(kurb->number_of_packets, &uurb->number_of_packets) ||
1189 __get_user(kurb->error_count, &uurb->error_count) ||
1190 __get_user(kurb->signr, &uurb->signr))
1191 return -EFAULT;
1192
1193 if (__get_user(uptr, &uurb->buffer))
1194 return -EFAULT;
1195 kurb->buffer = compat_ptr(uptr);
1196 if (__get_user(uptr, &uurb->buffer))
1197 return -EFAULT;
1198 kurb->usercontext = compat_ptr(uptr);
1199
1200 return 0;
1201}
1202
1203static int proc_submiturb_compat(struct dev_state *ps, void __user *arg)
1204{
1205 struct usbdevfs_urb uurb;
1206
1207 if (get_urb32(&uurb,(struct usbdevfs_urb32 *)arg))
1208 return -EFAULT;
1209
668a9541 1210 return proc_do_submiturb(ps, &uurb, ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc, arg);
1da177e4
LT		 1211}
1212
1213static int processcompl_compat(struct async *as, void __user * __user *arg)
1214{
1215 struct urb *urb = as->urb;
1216 struct usbdevfs_urb32 __user *userurb = as->userurb;
1217 void __user *addr = as->userurb;
1218 unsigned int i;
1219
1220 if (as->userbuffer)
1221 if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length))
1222 return -EFAULT;
1223 if (put_user(urb->status, &userurb->status))
1224 return -EFAULT;
1225 if (put_user(urb->actual_length, &userurb->actual_length))
1226 return -EFAULT;
1227 if (put_user(urb->error_count, &userurb->error_count))
1228 return -EFAULT;
1229
668a9541
CL		 1230 if (usb_pipeisoc(urb->pipe)) {
1231 for (i = 0; i < urb->number_of_packets; i++) {
1232 if (put_user(urb->iso_frame_desc[i].actual_length,
1233 &userurb->iso_frame_desc[i].actual_length))
1234 return -EFAULT;
1235 if (put_user(urb->iso_frame_desc[i].status,
1236 &userurb->iso_frame_desc[i].status))
1237 return -EFAULT;
1238 }
1da177e4
LT		 1239 }
1240
1241 free_async(as);
1242 if (put_user((u32)(u64)addr, (u32 __user *)arg))
1243 return -EFAULT;
1244 return 0;
1245}
1246
1247static int proc_reapurb_compat(struct dev_state *ps, void __user *arg)
1248{
1249 struct async *as = reap_as(ps);
1250 if (as)
1251 return processcompl_compat(as, (void __user * __user *)arg);
1252 if (signal_pending(current))
1253 return -EINTR;
1254 return -EIO;
1255}
1256
1257static int proc_reapurbnonblock_compat(struct dev_state *ps, void __user *arg)
1258{
1259 struct async *as;
1260
1da177e4
LT		 1261 if (!(as = async_getcompleted(ps)))
1262 return -EAGAIN;
1da177e4
LT		 1263 return processcompl_compat(as, (void __user * __user *)arg);
1264}
1265
1266#endif
1267
1268static int proc_disconnectsignal(struct dev_state *ps, void __user *arg)
1269{
1270 struct usbdevfs_disconnectsignal ds;
1271
1272 if (copy_from_user(&ds, arg, sizeof(ds)))
1273 return -EFAULT;
1274 if (ds.signr != 0 && (ds.signr < SIGRTMIN || ds.signr > SIGRTMAX))
1275 return -EINVAL;
1276 ps->discsignr = ds.signr;
1277 ps->disccontext = ds.context;
1278 return 0;
1279}
1280
1281static int proc_claiminterface(struct dev_state *ps, void __user *arg)
1282{
1283 unsigned int ifnum;
1284
1285 if (get_user(ifnum, (unsigned int __user *)arg))
1286 return -EFAULT;
1287 return claimintf(ps, ifnum);
1288}
1289
1290static int proc_releaseinterface(struct dev_state *ps, void __user *arg)
1291{
1292 unsigned int ifnum;
1293 int ret;
1294
1295 if (get_user(ifnum, (unsigned int __user *)arg))
1296 return -EFAULT;
1297 if ((ret = releaseintf(ps, ifnum)) < 0)
1298 return ret;
1299 destroy_async_on_interface (ps, ifnum);
1300 return 0;
1301}
1302
1303static int proc_ioctl (struct dev_state *ps, void __user *arg)
1304{
1305 struct usbdevfs_ioctl ctrl;
1306 int size;
1307 void *buf = NULL;
1308 int retval = 0;
1309 struct usb_interface *intf = NULL;
1310 struct usb_driver *driver = NULL;
1da177e4
LT		 1311
1312 /* get input parameters and alloc buffer */
1313 if (copy_from_user(&ctrl, arg, sizeof (ctrl)))
1314 return -EFAULT;
1315 if ((size = _IOC_SIZE (ctrl.ioctl_code)) > 0) {
1316 if ((buf = kmalloc (size, GFP_KERNEL)) == NULL)
1317 return -ENOMEM;
1318 if ((_IOC_DIR(ctrl.ioctl_code) & _IOC_WRITE)) {
1319 if (copy_from_user (buf, ctrl.data, size)) {
6fd19f4b 1320 kfree(buf);
1da177e4
LT		 1321 return -EFAULT;
1322 }
1323 } else {
1324 memset (buf, 0, size);
1325 }
1326 }
1327
1328 if (!connected(ps->dev)) {
6fd19f4b 1329 kfree(buf);
1da177e4
LT		 1330 return -ENODEV;
1331 }
1332
1333 if (ps->dev->state != USB_STATE_CONFIGURED)
1334 retval = -EHOSTUNREACH;
1335 else if (!(intf = usb_ifnum_to_if (ps->dev, ctrl.ifno)))
1336 retval = -EINVAL;
1337 else switch (ctrl.ioctl_code) {
1338
1339 /* disconnect kernel driver from interface */
1340 case USBDEVFS_DISCONNECT:
1341
1da177e4
LT		 1342 down_write(&usb_bus_type.subsys.rwsem);
1343 if (intf->dev.driver) {
1344 driver = to_usb_driver(intf->dev.driver);
1345 dev_dbg (&intf->dev, "disconnect by usbfs\n");
1346 usb_driver_release_interface(driver, intf);
1347 } else
1348 retval = -ENODATA;
1349 up_write(&usb_bus_type.subsys.rwsem);
1350 break;
1351
1352 /* let kernel drivers try to (re)bind to the interface */
1353 case USBDEVFS_CONNECT:
1354 usb_unlock_device(ps->dev);
1355 usb_lock_all_devices();
1356 bus_rescan_devices(intf->dev.bus);
1357 usb_unlock_all_devices();
1358 usb_lock_device(ps->dev);
1359 break;
1360
1361 /* talk directly to the interface's driver */
1362 default:
1363 down_read(&usb_bus_type.subsys.rwsem);
1364 if (intf->dev.driver)
1365 driver = to_usb_driver(intf->dev.driver);
1366 if (driver == NULL || driver->ioctl == NULL) {
1367 retval = -ENOTTY;
1368 } else {
1369 retval = driver->ioctl (intf, ctrl.ioctl_code, buf);
1370 if (retval == -ENOIOCTLCMD)
1371 retval = -ENOTTY;
1372 }
1373 up_read(&usb_bus_type.subsys.rwsem);
1374 }
1375
1376 /* cleanup and return */
1377 if (retval >= 0
1378 && (_IOC_DIR (ctrl.ioctl_code) & _IOC_READ) != 0
1379 && size > 0
1380 && copy_to_user (ctrl.data, buf, size) != 0)
1381 retval = -EFAULT;
6fd19f4b
JJ		 1382
1383 kfree(buf);
1da177e4
LT		 1384 return retval;
1385}
1386
1387/*
1388 * NOTE: All requests here that have interface numbers as parameters
1389 * are assuming that somehow the configuration has been prevented from
1390 * changing. But there's no mechanism to ensure that...
1391 */
1392static int usbdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
1393{
1394 struct dev_state *ps = (struct dev_state *)file->private_data;
1395 struct usb_device *dev = ps->dev;
1396 void __user *p = (void __user *)arg;
1397 int ret = -ENOTTY;
1398
1399 if (!(file->f_mode & FMODE_WRITE))
1400 return -EPERM;
1401 usb_lock_device(dev);
1402 if (!connected(dev)) {
1403 usb_unlock_device(dev);
1404 return -ENODEV;
1405 }
1406
1407 switch (cmd) {
1408 case USBDEVFS_CONTROL:
1409 snoop(&dev->dev, "%s: CONTROL\n", __FUNCTION__);
1410 ret = proc_control(ps, p);
1411 if (ret >= 0)
1412 inode->i_mtime = CURRENT_TIME;
1413 break;
1414
1415 case USBDEVFS_BULK:
1416 snoop(&dev->dev, "%s: BULK\n", __FUNCTION__);
1417 ret = proc_bulk(ps, p);
1418 if (ret >= 0)
1419 inode->i_mtime = CURRENT_TIME;
1420 break;
1421
1422 case USBDEVFS_RESETEP:
1423 snoop(&dev->dev, "%s: RESETEP\n", __FUNCTION__);
1424 ret = proc_resetep(ps, p);
1425 if (ret >= 0)
1426 inode->i_mtime = CURRENT_TIME;
1427 break;
1428
1429 case USBDEVFS_RESET:
1430 snoop(&dev->dev, "%s: RESET\n", __FUNCTION__);
1431 ret = proc_resetdevice(ps);
1432 break;
1433
1434 case USBDEVFS_CLEAR_HALT:
1435 snoop(&dev->dev, "%s: CLEAR_HALT\n", __FUNCTION__);
1436 ret = proc_clearhalt(ps, p);
1437 if (ret >= 0)
1438 inode->i_mtime = CURRENT_TIME;
1439 break;
1440
1441 case USBDEVFS_GETDRIVER:
1442 snoop(&dev->dev, "%s: GETDRIVER\n", __FUNCTION__);
1443 ret = proc_getdriver(ps, p);
1444 break;
1445
1446 case USBDEVFS_CONNECTINFO:
1447 snoop(&dev->dev, "%s: CONNECTINFO\n", __FUNCTION__);
1448 ret = proc_connectinfo(ps, p);
1449 break;
1450
1451 case USBDEVFS_SETINTERFACE:
1452 snoop(&dev->dev, "%s: SETINTERFACE\n", __FUNCTION__);
1453 ret = proc_setintf(ps, p);
1454 break;
1455
1456 case USBDEVFS_SETCONFIGURATION:
1457 snoop(&dev->dev, "%s: SETCONFIGURATION\n", __FUNCTION__);
1458 ret = proc_setconfig(ps, p);
1459 break;
1460
1461 case USBDEVFS_SUBMITURB:
1462 snoop(&dev->dev, "%s: SUBMITURB\n", __FUNCTION__);
1463 ret = proc_submiturb(ps, p);
1464 if (ret >= 0)
1465 inode->i_mtime = CURRENT_TIME;
1466 break;
1467
1468#ifdef CONFIG_COMPAT
1469
1470 case USBDEVFS_SUBMITURB32:
1471 snoop(&dev->dev, "%s: SUBMITURB32\n", __FUNCTION__);
1472 ret = proc_submiturb_compat(ps, p);
1473 if (ret >= 0)
1474 inode->i_mtime = CURRENT_TIME;
1475 break;
1476
1477 case USBDEVFS_REAPURB32:
1478 snoop(&dev->dev, "%s: REAPURB32\n", __FUNCTION__);
1479 ret = proc_reapurb_compat(ps, p);
1480 break;
1481
1482 case USBDEVFS_REAPURBNDELAY32:
1483 snoop(&dev->dev, "%s: REAPURBDELAY32\n", __FUNCTION__);
1484 ret = proc_reapurbnonblock_compat(ps, p);
1485 break;
1486
1487#endif
1488
1489 case USBDEVFS_DISCARDURB:
1490 snoop(&dev->dev, "%s: DISCARDURB\n", __FUNCTION__);
1491 ret = proc_unlinkurb(ps, p);
1492 break;
1493
1494 case USBDEVFS_REAPURB:
1495 snoop(&dev->dev, "%s: REAPURB\n", __FUNCTION__);
1496 ret = proc_reapurb(ps, p);
1497 break;
1498
1499 case USBDEVFS_REAPURBNDELAY:
1500 snoop(&dev->dev, "%s: REAPURBDELAY\n", __FUNCTION__);
1501 ret = proc_reapurbnonblock(ps, p);
1502 break;
1503
1504 case USBDEVFS_DISCSIGNAL:
1505 snoop(&dev->dev, "%s: DISCSIGNAL\n", __FUNCTION__);
1506 ret = proc_disconnectsignal(ps, p);
1507 break;
1508
1509 case USBDEVFS_CLAIMINTERFACE:
1510 snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __FUNCTION__);
1511 ret = proc_claiminterface(ps, p);
1512 break;
1513
1514 case USBDEVFS_RELEASEINTERFACE:
1515 snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __FUNCTION__);
1516 ret = proc_releaseinterface(ps, p);
1517 break;
1518
1519 case USBDEVFS_IOCTL:
1520 snoop(&dev->dev, "%s: IOCTL\n", __FUNCTION__);
1521 ret = proc_ioctl(ps, p);
1522 break;
1523 }
1524 usb_unlock_device(dev);
1525 if (ret >= 0)
1526 inode->i_atime = CURRENT_TIME;
1527 return ret;
1528}
1529
1530/* No kernel lock - fine */
1531static unsigned int usbdev_poll(struct file *file, struct poll_table_struct *wait)
1532{
1533 struct dev_state *ps = (struct dev_state *)file->private_data;
1534 unsigned int mask = 0;
1535
1536 poll_wait(file, &ps->wait, wait);
1537 if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed))
1538 mask |= POLLOUT | POLLWRNORM;
1539 if (!connected(ps->dev))
1540 mask |= POLLERR | POLLHUP;
1541 return mask;
1542}
1543
1544struct file_operations usbfs_device_file_operations = {
1545 .llseek = usbdev_lseek,
1546 .read = usbdev_read,
1547 .poll = usbdev_poll,
1548 .ioctl = usbdev_ioctl,
1549 .open = usbdev_open,
1550 .release = usbdev_release,
1551};
fbf82fd2 1552
fbf82fd2
KS		 1553void usbdev_add(struct usb_device *dev)
1554{
1555 int minor = ((dev->bus->busnum-1) * 128) + (dev->devnum-1);
1556
53f46542 1557 dev->class_dev = class_device_create(usb_device_class, NULL,
fbf82fd2
KS		 1558 MKDEV(USB_DEVICE_MAJOR, minor), &dev->dev,
1559 "usbdev%d.%d", dev->bus->busnum, dev->devnum);
1560
1561 dev->class_dev->class_data = dev;
1562}
1563
1564void usbdev_remove(struct usb_device *dev)
1565{
1566 class_device_unregister(dev->class_dev);
1567}
1568
1569static struct cdev usb_device_cdev = {
1570 .kobj = {.name = "usb_device", },
1571 .owner = THIS_MODULE,
1572};
1573
1574int __init usbdev_init(void)
1575{
1576 int retval;
1577
fad21bdf
AS		 1578 retval = register_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX,
1579 "usb_device");
fbf82fd2
KS		 1580 if (retval) {
1581 err("unable to register minors for usb_device");
1582 goto out;
1583 }
1584 cdev_init(&usb_device_cdev, &usbfs_device_file_operations);
fad21bdf 1585 retval = cdev_add(&usb_device_cdev, USB_DEVICE_DEV, USB_DEVICE_MAX);
fbf82fd2
KS		 1586 if (retval) {
1587 err("unable to get usb_device major %d", USB_DEVICE_MAJOR);
fad21bdf 1588 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
fbf82fd2
KS		 1589 goto out;
1590 }
1591 usb_device_class = class_create(THIS_MODULE, "usb_device");
1592 if (IS_ERR(usb_device_class)) {
1593 err("unable to register usb_device class");
1594 retval = PTR_ERR(usb_device_class);
1595 usb_device_class = NULL;
1596 cdev_del(&usb_device_cdev);
fad21bdf 1597 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
fbf82fd2
KS		 1598 }
1599
1600out:
1601 return retval;
1602}
1603
1604void usbdev_cleanup(void)
1605{
1606 class_destroy(usb_device_class);
1607 cdev_del(&usb_device_cdev);
fad21bdf 1608 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
fbf82fd2
KS		 1609}
1610
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