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USB: ehci completes high speed ISO URBs sooner
[deliverable/linux.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>
a7b986b3 49#include <linux/notifier.h>
7a01955f 50#include <linux/security.h>
1da177e4
LT		 51#include <asm/uaccess.h>
52#include <asm/byteorder.h>
53#include <linux/moduleparam.h>
54
55#include "hcd.h" /* for usbcore internals */
56#include "usb.h"
57
fbf82fd2
KS		 58#define USB_MAXBUS 64
59#define USB_DEVICE_MAX USB_MAXBUS * 128
fbf82fd2 60
4a2a8a2c
AS		 61/* Mutual exclusion for removal, open, and release */
62DEFINE_MUTEX(usbfs_mutex);
63
1da177e4
LT		 64struct async {
65 struct list_head asynclist;
66 struct dev_state *ps;
2425c08b 67 struct pid *pid;
46113830 68 uid_t uid, euid;
1da177e4
LT		 69 unsigned int signr;
70 unsigned int ifnum;
71 void __user *userbuffer;
72 void __user *userurb;
73 struct urb *urb;
e015268d 74 int status;
7a01955f 75 u32 secid;
1da177e4
LT		 76};
77
78static int usbfs_snoop = 0;
79module_param (usbfs_snoop, bool, S_IRUGO | S_IWUSR);
80MODULE_PARM_DESC (usbfs_snoop, "true to log all usbfs traffic");
81
82#define snoop(dev, format, arg...) \
83 do { \
84 if (usbfs_snoop) \
85 dev_info( dev , format , ## arg); \
86 } while (0)
87
fad21bdf
AS		 88#define USB_DEVICE_DEV MKDEV(USB_DEVICE_MAJOR, 0)
89
1da177e4
LT		 90
91#define MAX_USBFS_BUFFER_SIZE 16384
92
349710c3 93static inline int connected (struct dev_state *ps)
1da177e4 94{
349710c3
AS		 95 return (!list_empty(&ps->list) &&
96 ps->dev->state != USB_STATE_NOTATTACHED);
1da177e4
LT		 97}
98
99static loff_t usbdev_lseek(struct file *file, loff_t offset, int orig)
100{
101 loff_t ret;
102
103 lock_kernel();
104
105 switch (orig) {
106 case 0:
107 file->f_pos = offset;
108 ret = file->f_pos;
109 break;
110 case 1:
111 file->f_pos += offset;
112 ret = file->f_pos;
113 break;
114 case 2:
115 default:
116 ret = -EINVAL;
117 }
118
119 unlock_kernel();
120 return ret;
121}
122
123static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos)
124{
ec17cf1c 125 struct dev_state *ps = file->private_data;
1da177e4
LT		 126 struct usb_device *dev = ps->dev;
127 ssize_t ret = 0;
128 unsigned len;
129 loff_t pos;
130 int i;
131
132 pos = *ppos;
133 usb_lock_device(dev);
349710c3 134 if (!connected(ps)) {
1da177e4
LT		 135 ret = -ENODEV;
136 goto err;
137 } else if (pos < 0) {
138 ret = -EINVAL;
139 goto err;
140 }
141
142 if (pos < sizeof(struct usb_device_descriptor)) {
8781ba0a
ON		 143 struct usb_device_descriptor temp_desc ; /* 18 bytes - fits on the stack */
144
145 memcpy(&temp_desc, &dev->descriptor, sizeof(dev->descriptor));
9fcd5c32
AM		 146 le16_to_cpus(&temp_desc.bcdUSB);
147 le16_to_cpus(&temp_desc.idVendor);
148 le16_to_cpus(&temp_desc.idProduct);
149 le16_to_cpus(&temp_desc.bcdDevice);
1da177e4
LT		 150
151 len = sizeof(struct usb_device_descriptor) - pos;
152 if (len > nbytes)
153 len = nbytes;
8781ba0a 154 if (copy_to_user(buf, ((char *)&temp_desc) + pos, len)) {
1da177e4
LT		 155 ret = -EFAULT;
156 goto err;
157 }
1da177e4
LT		 158
159 *ppos += len;
160 buf += len;
161 nbytes -= len;
162 ret += len;
163 }
164
165 pos = sizeof(struct usb_device_descriptor);
166 for (i = 0; nbytes && i < dev->descriptor.bNumConfigurations; i++) {
167 struct usb_config_descriptor *config =
168 (struct usb_config_descriptor *)dev->rawdescriptors[i];
169 unsigned int length = le16_to_cpu(config->wTotalLength);
170
171 if (*ppos < pos + length) {
172
173 /* The descriptor may claim to be longer than it
174 * really is. Here is the actual allocated length. */
175 unsigned alloclen =
176 le16_to_cpu(dev->config[i].desc.wTotalLength);
177
178 len = length - (*ppos - pos);
179 if (len > nbytes)
180 len = nbytes;
181
182 /* Simply don't write (skip over) unallocated parts */
183 if (alloclen > (*ppos - pos)) {
184 alloclen -= (*ppos - pos);
185 if (copy_to_user(buf,
186 dev->rawdescriptors[i] + (*ppos - pos),
187 min(len, alloclen))) {
188 ret = -EFAULT;
189 goto err;
190 }
191 }
192
193 *ppos += len;
194 buf += len;
195 nbytes -= len;
196 ret += len;
197 }
198
199 pos += length;
200 }
201
202err:
203 usb_unlock_device(dev);
204 return ret;
205}
206
207/*
208 * async list handling
209 */
210
211static struct async *alloc_async(unsigned int numisoframes)
212{
213 unsigned int assize = sizeof(struct async) + numisoframes * sizeof(struct usb_iso_packet_descriptor);
0a1ef3b5
AS		 214 struct async *as = kzalloc(assize, GFP_KERNEL);
215
1da177e4
LT		 216 if (!as)
217 return NULL;
1da177e4
LT		 218 as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL);
219 if (!as->urb) {
220 kfree(as);
221 return NULL;
222 }
223 return as;
224}
225
226static void free_async(struct async *as)
227{
2425c08b 228 put_pid(as->pid);
6fd19f4b
JJ		 229 kfree(as->urb->transfer_buffer);
230 kfree(as->urb->setup_packet);
1da177e4 231 usb_free_urb(as->urb);
6fd19f4b 232 kfree(as);
1da177e4
LT		 233}
234
235static inline void async_newpending(struct async *as)
236{
237 struct dev_state *ps = as->ps;
238 unsigned long flags;
239
240 spin_lock_irqsave(&ps->lock, flags);
241 list_add_tail(&as->asynclist, &ps->async_pending);
242 spin_unlock_irqrestore(&ps->lock, flags);
243}
244
245static inline void async_removepending(struct async *as)
246{
247 struct dev_state *ps = as->ps;
248 unsigned long flags;
249
250 spin_lock_irqsave(&ps->lock, flags);
251 list_del_init(&as->asynclist);
252 spin_unlock_irqrestore(&ps->lock, flags);
253}
254
255static inline struct async *async_getcompleted(struct dev_state *ps)
256{
257 unsigned long flags;
258 struct async *as = NULL;
259
260 spin_lock_irqsave(&ps->lock, flags);
261 if (!list_empty(&ps->async_completed)) {
262 as = list_entry(ps->async_completed.next, struct async, asynclist);
263 list_del_init(&as->asynclist);
264 }
265 spin_unlock_irqrestore(&ps->lock, flags);
266 return as;
267}
268
269static inline struct async *async_getpending(struct dev_state *ps, void __user *userurb)
270{
271 unsigned long flags;
272 struct async *as;
273
274 spin_lock_irqsave(&ps->lock, flags);
275 list_for_each_entry(as, &ps->async_pending, asynclist)
276 if (as->userurb == userurb) {
277 list_del_init(&as->asynclist);
278 spin_unlock_irqrestore(&ps->lock, flags);
279 return as;
280 }
281 spin_unlock_irqrestore(&ps->lock, flags);
282 return NULL;
283}
284
e639dd3f
GKH		 285static void snoop_urb(struct urb *urb, void __user *userurb)
286{
287 int j;
288 unsigned char *data = urb->transfer_buffer;
289
290 if (!usbfs_snoop)
291 return;
292
93cf9b90
AS		 293 dev_info(&urb->dev->dev, "direction=%s\n",
294 usb_urb_dir_in(urb) ? "IN" : "OUT");
e639dd3f
GKH		 295 dev_info(&urb->dev->dev, "userurb=%p\n", userurb);
296 dev_info(&urb->dev->dev, "transfer_buffer_length=%d\n",
297 urb->transfer_buffer_length);
298 dev_info(&urb->dev->dev, "actual_length=%d\n", urb->actual_length);
299 dev_info(&urb->dev->dev, "data: ");
300 for (j = 0; j < urb->transfer_buffer_length; ++j)
301 printk ("%02x ", data[j]);
302 printk("\n");
303}
304
7d12e780 305static void async_completed(struct urb *urb)
1da177e4 306{
ec17cf1c 307 struct async *as = urb->context;
1da177e4
LT		 308 struct dev_state *ps = as->ps;
309 struct siginfo sinfo;
310
311 spin_lock(&ps->lock);
312 list_move_tail(&as->asynclist, &ps->async_completed);
313 spin_unlock(&ps->lock);
e015268d 314 as->status = urb->status;
1da177e4
LT		 315 if (as->signr) {
316 sinfo.si_signo = as->signr;
e015268d 317 sinfo.si_errno = as->status;
1da177e4
LT		 318 sinfo.si_code = SI_ASYNCIO;
319 sinfo.si_addr = as->userurb;
2425c08b 320 kill_pid_info_as_uid(as->signr, &sinfo, as->pid, as->uid,
7a01955f 321 as->euid, as->secid);
1da177e4 322 }
e639dd3f
GKH		 323 snoop(&urb->dev->dev, "urb complete\n");
324 snoop_urb(urb, as->userurb);
325 wake_up(&ps->wait);
1da177e4
LT		 326}
327
328static void destroy_async (struct dev_state *ps, struct list_head *list)
329{
330 struct async *as;
331 unsigned long flags;
332
333 spin_lock_irqsave(&ps->lock, flags);
334 while (!list_empty(list)) {
335 as = list_entry(list->next, struct async, asynclist);
336 list_del_init(&as->asynclist);
337
338 /* drop the spinlock so the completion handler can run */
339 spin_unlock_irqrestore(&ps->lock, flags);
340 usb_kill_urb(as->urb);
341 spin_lock_irqsave(&ps->lock, flags);
342 }
343 spin_unlock_irqrestore(&ps->lock, flags);
344 as = async_getcompleted(ps);
345 while (as) {
346 free_async(as);
347 as = async_getcompleted(ps);
348 }
349}
350
351static void destroy_async_on_interface (struct dev_state *ps, unsigned int ifnum)
352{
353 struct list_head *p, *q, hitlist;
354 unsigned long flags;
355
356 INIT_LIST_HEAD(&hitlist);
357 spin_lock_irqsave(&ps->lock, flags);
358 list_for_each_safe(p, q, &ps->async_pending)
359 if (ifnum == list_entry(p, struct async, asynclist)->ifnum)
360 list_move_tail(p, &hitlist);
361 spin_unlock_irqrestore(&ps->lock, flags);
362 destroy_async(ps, &hitlist);
363}
364
365static inline void destroy_all_async(struct dev_state *ps)
366{
367 destroy_async(ps, &ps->async_pending);
368}
369
370/*
371 * interface claims are made only at the request of user level code,
372 * which can also release them (explicitly or by closing files).
373 * they're also undone when devices disconnect.
374 */
375
376static int driver_probe (struct usb_interface *intf,
377 const struct usb_device_id *id)
378{
379 return -ENODEV;
380}
381
382static void driver_disconnect(struct usb_interface *intf)
383{
384 struct dev_state *ps = usb_get_intfdata (intf);
385 unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber;
386
387 if (!ps)
388 return;
389
390 /* NOTE: this relies on usbcore having canceled and completed
391 * all pending I/O requests; 2.6 does that.
392 */
393
394 if (likely(ifnum < 8*sizeof(ps->ifclaimed)))
395 clear_bit(ifnum, &ps->ifclaimed);
396 else
397 warn("interface number %u out of range", ifnum);
398
399 usb_set_intfdata (intf, NULL);
400
401 /* force async requests to complete */
402 destroy_async_on_interface(ps, ifnum);
403}
404
2e2eb83f
AS		 405/* The following routines are merely placeholders. There is no way
406 * to inform a user task about suspend or resumes.
407 */
408static int driver_suspend(struct usb_interface *intf, pm_message_t msg)
409{
410 return 0;
411}
412
413static int driver_resume(struct usb_interface *intf)
414{
415 return 0;
416}
417
1da177e4 418struct usb_driver usbfs_driver = {
1da177e4
LT		 419 .name = "usbfs",
420 .probe = driver_probe,
421 .disconnect = driver_disconnect,
2e2eb83f
AS		 422 .suspend = driver_suspend,
423 .resume = driver_resume,
1da177e4
LT		 424};
425
426static int claimintf(struct dev_state *ps, unsigned int ifnum)
427{
428 struct usb_device *dev = ps->dev;
429 struct usb_interface *intf;
430 int err;
431
432 if (ifnum >= 8*sizeof(ps->ifclaimed))
433 return -EINVAL;
434 /* already claimed */
435 if (test_bit(ifnum, &ps->ifclaimed))
436 return 0;
437
1da177e4
LT		 438 intf = usb_ifnum_to_if(dev, ifnum);
439 if (!intf)
440 err = -ENOENT;
441 else
442 err = usb_driver_claim_interface(&usbfs_driver, intf, ps);
1da177e4
LT		 443 if (err == 0)
444 set_bit(ifnum, &ps->ifclaimed);
445 return err;
446}
447
448static int releaseintf(struct dev_state *ps, unsigned int ifnum)
449{
450 struct usb_device *dev;
451 struct usb_interface *intf;
452 int err;
453
454 err = -EINVAL;
455 if (ifnum >= 8*sizeof(ps->ifclaimed))
456 return err;
457 dev = ps->dev;
1da177e4
LT		 458 intf = usb_ifnum_to_if(dev, ifnum);
459 if (!intf)
460 err = -ENOENT;
461 else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) {
462 usb_driver_release_interface(&usbfs_driver, intf);
463 err = 0;
464 }
1da177e4
LT		 465 return err;
466}
467
468static int checkintf(struct dev_state *ps, unsigned int ifnum)
469{
470 if (ps->dev->state != USB_STATE_CONFIGURED)
471 return -EHOSTUNREACH;
472 if (ifnum >= 8*sizeof(ps->ifclaimed))
473 return -EINVAL;
474 if (test_bit(ifnum, &ps->ifclaimed))
475 return 0;
476 /* if not yet claimed, claim it for the driver */
477 dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim interface %u before use\n",
ba25f9dc 478 task_pid_nr(current), current->comm, ifnum);
1da177e4
LT		 479 return claimintf(ps, ifnum);
480}
481
482static int findintfep(struct usb_device *dev, unsigned int ep)
483{
484 unsigned int i, j, e;
485 struct usb_interface *intf;
486 struct usb_host_interface *alts;
487 struct usb_endpoint_descriptor *endpt;
488
489 if (ep & ~(USB_DIR_IN|0xf))
490 return -EINVAL;
491 if (!dev->actconfig)
492 return -ESRCH;
493 for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) {
494 intf = dev->actconfig->interface[i];
495 for (j = 0; j < intf->num_altsetting; j++) {
496 alts = &intf->altsetting[j];
497 for (e = 0; e < alts->desc.bNumEndpoints; e++) {
498 endpt = &alts->endpoint[e].desc;
499 if (endpt->bEndpointAddress == ep)
500 return alts->desc.bInterfaceNumber;
501 }
502 }
503 }
504 return -ENOENT;
505}
506
507static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype, unsigned int index)
508{
509 int ret = 0;
510
24f8b116
HS		 511 if (ps->dev->state != USB_STATE_ADDRESS
512 && ps->dev->state != USB_STATE_CONFIGURED)
1da177e4
LT		 513 return -EHOSTUNREACH;
514 if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype))
515 return 0;
516
517 index &= 0xff;
518 switch (requesttype & USB_RECIP_MASK) {
519 case USB_RECIP_ENDPOINT:
520 if ((ret = findintfep(ps->dev, index)) >= 0)
521 ret = checkintf(ps, ret);
522 break;
523
524 case USB_RECIP_INTERFACE:
525 ret = checkintf(ps, index);
526 break;
527 }
528 return ret;
529}
530
9f8b17e6 531static int __match_minor(struct device *dev, void *data)
4592bf5a 532{
9f8b17e6 533 int minor = *((int *)data);
4592bf5a 534
9f8b17e6
KS		 535 if (dev->devt == MKDEV(USB_DEVICE_MAJOR, minor))
536 return 1;
537 return 0;
538}
4592bf5a 539
9f8b17e6
KS		 540static struct usb_device *usbdev_lookup_by_minor(int minor)
541{
542 struct device *dev;
543
544 dev = bus_find_device(&usb_bus_type, NULL, &minor, __match_minor);
545 if (!dev)
546 return NULL;
547 put_device(dev);
548 return container_of(dev, struct usb_device, dev);
549}
4592bf5a 550
1da177e4
LT		 551/*
552 * file operations
553 */
554static int usbdev_open(struct inode *inode, struct file *file)
555{
fbf82fd2 556 struct usb_device *dev = NULL;
1da177e4
LT		 557 struct dev_state *ps;
558 int ret;
559
4a2a8a2c
AS		 560 /* Protect against simultaneous removal or release */
561 mutex_lock(&usbfs_mutex);
562
1da177e4
LT		 563 ret = -ENOMEM;
564 if (!(ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL)))
4a2a8a2c 565 goto out;
1da177e4 566
1da177e4 567 ret = -ENOENT;
9f8b17e6 568 /* usbdev device-node */
fbf82fd2 569 if (imajor(inode) == USB_DEVICE_MAJOR)
9f8b17e6
KS		 570 dev = usbdev_lookup_by_minor(iminor(inode));
571#ifdef CONFIG_USB_DEVICEFS
572 /* procfs file */
fbf82fd2 573 if (!dev)
8e18e294 574 dev = inode->i_private;
9f8b17e6 575#endif
01d883d4 576 if (!dev)
1da177e4 577 goto out;
94fcda1f 578 ret = usb_autoresume_device(dev);
01d883d4
AS		 579 if (ret)
580 goto out;
581
fbf82fd2 582 usb_get_dev(dev);
1da177e4
LT		 583 ret = 0;
584 ps->dev = dev;
585 ps->file = file;
586 spin_lock_init(&ps->lock);
316547fd 587 INIT_LIST_HEAD(&ps->list);
1da177e4
LT		 588 INIT_LIST_HEAD(&ps->async_pending);
589 INIT_LIST_HEAD(&ps->async_completed);
590 init_waitqueue_head(&ps->wait);
591 ps->discsignr = 0;
2425c08b 592 ps->disc_pid = get_pid(task_pid(current));
d7dd8a72
LT		 593 ps->disc_uid = current->uid;
594 ps->disc_euid = current->euid;
1da177e4
LT		 595 ps->disccontext = NULL;
596 ps->ifclaimed = 0;
7a01955f 597 security_task_getsecid(current, &ps->secid);
527660a8 598 smp_wmb();
1da177e4
LT		 599 list_add_tail(&ps->list, &dev->filelist);
600 file->private_data = ps;
601 out:
01d883d4
AS		 602 if (ret)
603 kfree(ps);
4a2a8a2c
AS		 604 mutex_unlock(&usbfs_mutex);
605 return ret;
1da177e4
LT		 606}
607
608static int usbdev_release(struct inode *inode, struct file *file)
609{
ec17cf1c 610 struct dev_state *ps = file->private_data;
1da177e4
LT		 611 struct usb_device *dev = ps->dev;
612 unsigned int ifnum;
613
614 usb_lock_device(dev);
4a2a8a2c
AS		 615
616 /* Protect against simultaneous open */
617 mutex_lock(&usbfs_mutex);
1da177e4 618 list_del_init(&ps->list);
4a2a8a2c
AS		 619 mutex_unlock(&usbfs_mutex);
620
1da177e4
LT		 621 for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed);
622 ifnum++) {
623 if (test_bit(ifnum, &ps->ifclaimed))
624 releaseintf(ps, ifnum);
625 }
626 destroy_all_async(ps);
94fcda1f 627 usb_autosuspend_device(dev);
1da177e4
LT		 628 usb_unlock_device(dev);
629 usb_put_dev(dev);
2425c08b 630 put_pid(ps->disc_pid);
1da177e4 631 kfree(ps);
4a2a8a2c 632 return 0;
1da177e4
LT		 633}
634
635static int proc_control(struct dev_state *ps, void __user *arg)
636{
637 struct usb_device *dev = ps->dev;
638 struct usbdevfs_ctrltransfer ctrl;
639 unsigned int tmo;
640 unsigned char *tbuf;
641 int i, j, ret;
642
643 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
644 return -EFAULT;
645 if ((ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.wIndex)))
646 return ret;
647 if (ctrl.wLength > PAGE_SIZE)
648 return -EINVAL;
649 if (!(tbuf = (unsigned char *)__get_free_page(GFP_KERNEL)))
650 return -ENOMEM;
651 tmo = ctrl.timeout;
652 if (ctrl.bRequestType & 0x80) {
653 if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data, ctrl.wLength)) {
654 free_page((unsigned long)tbuf);
655 return -EINVAL;
656 }
fe0410c7
AS		 657 snoop(&dev->dev, "control read: bRequest=%02x "
658 "bRrequestType=%02x wValue=%04x "
659 "wIndex=%04x wLength=%04x\n",
660 ctrl.bRequest, ctrl.bRequestType, ctrl.wValue,
661 ctrl.wIndex, ctrl.wLength);
1da177e4
LT		 662
663 usb_unlock_device(dev);
664 i = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType,
665 ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo);
666 usb_lock_device(dev);
667 if ((i > 0) && ctrl.wLength) {
668 if (usbfs_snoop) {
669 dev_info(&dev->dev, "control read: data ");
fe0410c7 670 for (j = 0; j < i; ++j)
e639dd3f 671 printk("%02x ", (unsigned char)(tbuf)[j]);
1da177e4
LT		 672 printk("\n");
673 }
fe0410c7 674 if (copy_to_user(ctrl.data, tbuf, i)) {
1da177e4
LT		 675 free_page((unsigned long)tbuf);
676 return -EFAULT;
677 }
678 }
679 } else {
680 if (ctrl.wLength) {
681 if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) {
682 free_page((unsigned long)tbuf);
683 return -EFAULT;
684 }
685 }
fe0410c7
AS		 686 snoop(&dev->dev, "control write: bRequest=%02x "
687 "bRrequestType=%02x wValue=%04x "
688 "wIndex=%04x wLength=%04x\n",
689 ctrl.bRequest, ctrl.bRequestType, ctrl.wValue,
690 ctrl.wIndex, ctrl.wLength);
1da177e4
LT		 691 if (usbfs_snoop) {
692 dev_info(&dev->dev, "control write: data: ");
693 for (j = 0; j < ctrl.wLength; ++j)
e639dd3f 694 printk("%02x ", (unsigned char)(tbuf)[j]);
1da177e4
LT		 695 printk("\n");
696 }
697 usb_unlock_device(dev);
698 i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType,
699 ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo);
700 usb_lock_device(dev);
701 }
702 free_page((unsigned long)tbuf);
703 if (i<0 && i != -EPIPE) {
704 dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL "
705 "failed cmd %s rqt %u rq %u len %u ret %d\n",
706 current->comm, ctrl.bRequestType, ctrl.bRequest,
707 ctrl.wLength, i);
708 }
709 return i;
710}
711
712static int proc_bulk(struct dev_state *ps, void __user *arg)
713{
714 struct usb_device *dev = ps->dev;
715 struct usbdevfs_bulktransfer bulk;
716 unsigned int tmo, len1, pipe;
717 int len2;
718 unsigned char *tbuf;
e639dd3f 719 int i, j, ret;
1da177e4
LT		 720
721 if (copy_from_user(&bulk, arg, sizeof(bulk)))
722 return -EFAULT;
723 if ((ret = findintfep(ps->dev, bulk.ep)) < 0)
724 return ret;
725 if ((ret = checkintf(ps, ret)))
726 return ret;
727 if (bulk.ep & USB_DIR_IN)
728 pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f);
729 else
730 pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f);
731 if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN)))
732 return -EINVAL;
733 len1 = bulk.len;
734 if (len1 > MAX_USBFS_BUFFER_SIZE)
735 return -EINVAL;
736 if (!(tbuf = kmalloc(len1, GFP_KERNEL)))
737 return -ENOMEM;
738 tmo = bulk.timeout;
739 if (bulk.ep & 0x80) {
740 if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) {
741 kfree(tbuf);
742 return -EINVAL;
743 }
e639dd3f
GKH		 744 snoop(&dev->dev, "bulk read: len=0x%02x timeout=%04d\n",
745 bulk.len, bulk.timeout);
1da177e4
LT		 746 usb_unlock_device(dev);
747 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
748 usb_lock_device(dev);
749 if (!i && len2) {
e639dd3f
GKH		 750 if (usbfs_snoop) {
751 dev_info(&dev->dev, "bulk read: data ");
752 for (j = 0; j < len2; ++j)
753 printk("%02x ", (unsigned char)(tbuf)[j]);
754 printk("\n");
755 }
1da177e4
LT		 756 if (copy_to_user(bulk.data, tbuf, len2)) {
757 kfree(tbuf);
758 return -EFAULT;
759 }
760 }
761 } else {
762 if (len1) {
763 if (copy_from_user(tbuf, bulk.data, len1)) {
764 kfree(tbuf);
765 return -EFAULT;
766 }
767 }
e639dd3f
GKH		 768 snoop(&dev->dev, "bulk write: len=0x%02x timeout=%04d\n",
769 bulk.len, bulk.timeout);
770 if (usbfs_snoop) {
771 dev_info(&dev->dev, "bulk write: data: ");
772 for (j = 0; j < len1; ++j)
773 printk("%02x ", (unsigned char)(tbuf)[j]);
774 printk("\n");
775 }
1da177e4
LT		 776 usb_unlock_device(dev);
777 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
778 usb_lock_device(dev);
779 }
780 kfree(tbuf);
781 if (i < 0)
782 return i;
783 return len2;
784}
785
786static int proc_resetep(struct dev_state *ps, void __user *arg)
787{
788 unsigned int ep;
789 int ret;
790
791 if (get_user(ep, (unsigned int __user *)arg))
792 return -EFAULT;
793 if ((ret = findintfep(ps->dev, ep)) < 0)
794 return ret;
795 if ((ret = checkintf(ps, ret)))
796 return ret;
797 usb_settoggle(ps->dev, ep & 0xf, !(ep & USB_DIR_IN), 0);
798 return 0;
799}
800
801static int proc_clearhalt(struct dev_state *ps, void __user *arg)
802{
803 unsigned int ep;
804 int pipe;
805 int ret;
806
807 if (get_user(ep, (unsigned int __user *)arg))
808 return -EFAULT;
809 if ((ret = findintfep(ps->dev, ep)) < 0)
810 return ret;
811 if ((ret = checkintf(ps, ret)))
812 return ret;
813 if (ep & USB_DIR_IN)
814 pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f);
815 else
816 pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f);
817
818 return usb_clear_halt(ps->dev, pipe);
819}
820
821
822static int proc_getdriver(struct dev_state *ps, void __user *arg)
823{
824 struct usbdevfs_getdriver gd;
825 struct usb_interface *intf;
826 int ret;
827
828 if (copy_from_user(&gd, arg, sizeof(gd)))
829 return -EFAULT;
1da177e4
LT		 830 intf = usb_ifnum_to_if(ps->dev, gd.interface);
831 if (!intf || !intf->dev.driver)
832 ret = -ENODATA;
833 else {
834 strncpy(gd.driver, intf->dev.driver->name,
835 sizeof(gd.driver));
836 ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0);
837 }
1da177e4
LT		 838 return ret;
839}
840
841static int proc_connectinfo(struct dev_state *ps, void __user *arg)
842{
843 struct usbdevfs_connectinfo ci;
844
845 ci.devnum = ps->dev->devnum;
846 ci.slow = ps->dev->speed == USB_SPEED_LOW;
847 if (copy_to_user(arg, &ci, sizeof(ci)))
848 return -EFAULT;
849 return 0;
850}
851
852static int proc_resetdevice(struct dev_state *ps)
853{
79efa097 854 return usb_reset_composite_device(ps->dev, NULL);
1da177e4
LT		 855}
856
857static int proc_setintf(struct dev_state *ps, void __user *arg)
858{
859 struct usbdevfs_setinterface setintf;
860 int ret;
861
862 if (copy_from_user(&setintf, arg, sizeof(setintf)))
863 return -EFAULT;
864 if ((ret = checkintf(ps, setintf.interface)))
865 return ret;
866 return usb_set_interface(ps->dev, setintf.interface,
867 setintf.altsetting);
868}
869
870static int proc_setconfig(struct dev_state *ps, void __user *arg)
871{
3f141e2a 872 int u;
1da177e4
LT		 873 int status = 0;
874 struct usb_host_config *actconfig;
875
3f141e2a 876 if (get_user(u, (int __user *)arg))
1da177e4
LT		 877 return -EFAULT;
878
879 actconfig = ps->dev->actconfig;
880
881 /* Don't touch the device if any interfaces are claimed.
882 * It could interfere with other drivers' operations, and if
883 * an interface is claimed by usbfs it could easily deadlock.
884 */
885 if (actconfig) {
886 int i;
887
888 for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) {
889 if (usb_interface_claimed(actconfig->interface[i])) {
890 dev_warn (&ps->dev->dev,
72ebddb5 891 "usbfs: interface %d claimed by %s "
1da177e4
LT		 892 "while '%s' sets config #%d\n",
893 actconfig->interface[i]
894 ->cur_altsetting
895 ->desc.bInterfaceNumber,
72ebddb5
DB		 896 actconfig->interface[i]
897 ->dev.driver->name,
1da177e4 898 current->comm, u);
1da177e4
LT		 899 status = -EBUSY;
900 break;
1da177e4
LT		 901 }
902 }
903 }
904
905 /* SET_CONFIGURATION is often abused as a "cheap" driver reset,
906 * so avoid usb_set_configuration()'s kick to sysfs
907 */
908 if (status == 0) {
909 if (actconfig && actconfig->desc.bConfigurationValue == u)
910 status = usb_reset_configuration(ps->dev);
911 else
912 status = usb_set_configuration(ps->dev, u);
913 }
914
915 return status;
916}
917
1da177e4
LT		 918static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
919 struct usbdevfs_iso_packet_desc __user *iso_frame_desc,
920 void __user *arg)
921{
922 struct usbdevfs_iso_packet_desc *isopkt = NULL;
923 struct usb_host_endpoint *ep;
924 struct async *as;
925 struct usb_ctrlrequest *dr = NULL;
926 unsigned int u, totlen, isofrmlen;
97b9eb91 927 int ret, ifnum = -1;
93cf9b90 928 int is_in;
1da177e4
LT		 929
930 if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP|USBDEVFS_URB_SHORT_NOT_OK|
931 URB_NO_FSBR|URB_ZERO_PACKET))
932 return -EINVAL;
933 if (!uurb->buffer)
934 return -EINVAL;
935 if (uurb->signr != 0 && (uurb->signr < SIGRTMIN || uurb->signr > SIGRTMAX))
936 return -EINVAL;
937 if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL && (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) {
938 if ((ifnum = findintfep(ps->dev, uurb->endpoint)) < 0)
939 return ifnum;
940 if ((ret = checkintf(ps, ifnum)))
941 return ret;
942 }
93cf9b90
AS		 943 if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0) {
944 is_in = 1;
945 ep = ps->dev->ep_in[uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
946 } else {
947 is_in = 0;
948 ep = ps->dev->ep_out[uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
949 }
1da177e4
LT		 950 if (!ep)
951 return -ENOENT;
952 switch(uurb->type) {
953 case USBDEVFS_URB_TYPE_CONTROL:
93cf9b90 954 if (!usb_endpoint_xfer_control(&ep->desc))
1da177e4 955 return -EINVAL;
e016683d
MD		 956 /* min 8 byte setup packet, max 8 byte setup plus an arbitrary data stage */
957 if (uurb->buffer_length < 8 || uurb->buffer_length > (8 + MAX_USBFS_BUFFER_SIZE))
1da177e4
LT		 958 return -EINVAL;
959 if (!(dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL)))
960 return -ENOMEM;
961 if (copy_from_user(dr, uurb->buffer, 8)) {
962 kfree(dr);
963 return -EFAULT;
964 }
965 if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) {
966 kfree(dr);
967 return -EINVAL;
968 }
969 if ((ret = check_ctrlrecip(ps, dr->bRequestType, le16_to_cpup(&dr->wIndex)))) {
970 kfree(dr);
971 return ret;
972 }
1da177e4
LT		 973 uurb->number_of_packets = 0;
974 uurb->buffer_length = le16_to_cpup(&dr->wLength);
975 uurb->buffer += 8;
93cf9b90
AS		 976 if ((dr->bRequestType & USB_DIR_IN) && uurb->buffer_length) {
977 is_in = 1;
978 uurb->endpoint |= USB_DIR_IN;
979 } else {
980 is_in = 0;
981 uurb->endpoint &= ~USB_DIR_IN;
982 }
983 if (!access_ok(is_in ? VERIFY_WRITE : VERIFY_READ,
984 uurb->buffer, uurb->buffer_length)) {
1da177e4
LT		 985 kfree(dr);
986 return -EFAULT;
987 }
df251b8b
CF		 988 snoop(&ps->dev->dev, "control urb: bRequest=%02x "
989 "bRrequestType=%02x wValue=%04x "
990 "wIndex=%04x wLength=%04x\n",
93cf9b90
AS		 991 dr->bRequest, dr->bRequestType,
992 __le16_to_cpup(&dr->wValue),
993 __le16_to_cpup(&dr->wIndex),
994 __le16_to_cpup(&dr->wLength));
1da177e4
LT		 995 break;
996
997 case USBDEVFS_URB_TYPE_BULK:
93cf9b90 998 switch (usb_endpoint_type(&ep->desc)) {
1da177e4
LT		 999 case USB_ENDPOINT_XFER_CONTROL:
1000 case USB_ENDPOINT_XFER_ISOC:
1001 return -EINVAL;
1002 /* allow single-shot interrupt transfers, at bogus rates */
1003 }
1004 uurb->number_of_packets = 0;
1005 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE)
1006 return -EINVAL;
93cf9b90
AS		 1007 if (!access_ok(is_in ? VERIFY_WRITE : VERIFY_READ,
1008 uurb->buffer, uurb->buffer_length))
1da177e4 1009 return -EFAULT;
e639dd3f 1010 snoop(&ps->dev->dev, "bulk urb\n");
1da177e4
LT		 1011 break;
1012
1013 case USBDEVFS_URB_TYPE_ISO:
1014 /* arbitrary limit */
1015 if (uurb->number_of_packets < 1 || uurb->number_of_packets > 128)
1016 return -EINVAL;
93cf9b90 1017 if (!usb_endpoint_xfer_isoc(&ep->desc))
1da177e4 1018 return -EINVAL;
1da177e4
LT		 1019 isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * uurb->number_of_packets;
1020 if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL)))
1021 return -ENOMEM;
1022 if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) {
1023 kfree(isopkt);
1024 return -EFAULT;
1025 }
1026 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
3612242e
MD		 1027 /* arbitrary limit, sufficient for USB 2.0 high-bandwidth iso */
1028 if (isopkt[u].length > 8192) {
1da177e4
LT		 1029 kfree(isopkt);
1030 return -EINVAL;
1031 }
1032 totlen += isopkt[u].length;
1033 }
1034 if (totlen > 32768) {
1035 kfree(isopkt);
1036 return -EINVAL;
1037 }
1038 uurb->buffer_length = totlen;
e639dd3f 1039 snoop(&ps->dev->dev, "iso urb\n");
1da177e4
LT		 1040 break;
1041
1042 case USBDEVFS_URB_TYPE_INTERRUPT:
1043 uurb->number_of_packets = 0;
93cf9b90 1044 if (!usb_endpoint_xfer_int(&ep->desc))
1da177e4 1045 return -EINVAL;
1da177e4
LT		 1046 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE)
1047 return -EINVAL;
93cf9b90
AS		 1048 if (!access_ok(is_in ? VERIFY_WRITE : VERIFY_READ,
1049 uurb->buffer, uurb->buffer_length))
1da177e4 1050 return -EFAULT;
e639dd3f 1051 snoop(&ps->dev->dev, "interrupt urb\n");
1da177e4
LT		 1052 break;
1053
1054 default:
1055 return -EINVAL;
1056 }
1057 if (!(as = alloc_async(uurb->number_of_packets))) {
6fd19f4b
JJ		 1058 kfree(isopkt);
1059 kfree(dr);
1da177e4
LT		 1060 return -ENOMEM;
1061 }
1062 if (!(as->urb->transfer_buffer = kmalloc(uurb->buffer_length, GFP_KERNEL))) {
6fd19f4b
JJ		 1063 kfree(isopkt);
1064 kfree(dr);
1da177e4
LT		 1065 free_async(as);
1066 return -ENOMEM;
1067 }
1068 as->urb->dev = ps->dev;
93cf9b90
AS		 1069 as->urb->pipe = (uurb->type << 30) |
1070 __create_pipe(ps->dev, uurb->endpoint & 0xf) |
1071 (uurb->endpoint & USB_DIR_IN);
1072 as->urb->transfer_flags = uurb->flags |
1073 (is_in ? URB_DIR_IN : URB_DIR_OUT);
1da177e4
LT		 1074 as->urb->transfer_buffer_length = uurb->buffer_length;
1075 as->urb->setup_packet = (unsigned char*)dr;
1076 as->urb->start_frame = uurb->start_frame;
1077 as->urb->number_of_packets = uurb->number_of_packets;
97b9eb91
AS		 1078 if (uurb->type == USBDEVFS_URB_TYPE_ISO ||
1079 ps->dev->speed == USB_SPEED_HIGH)
1080 as->urb->interval = 1 << min(15, ep->desc.bInterval - 1);
1081 else
1082 as->urb->interval = ep->desc.bInterval;
1da177e4
LT		 1083 as->urb->context = as;
1084 as->urb->complete = async_completed;
1085 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
1086 as->urb->iso_frame_desc[u].offset = totlen;
1087 as->urb->iso_frame_desc[u].length = isopkt[u].length;
1088 totlen += isopkt[u].length;
1089 }
6fd19f4b 1090 kfree(isopkt);
1da177e4
LT		 1091 as->ps = ps;
1092 as->userurb = arg;
1093 if (uurb->endpoint & USB_DIR_IN)
1094 as->userbuffer = uurb->buffer;
1095 else
1096 as->userbuffer = NULL;
1097 as->signr = uurb->signr;
1098 as->ifnum = ifnum;
2425c08b 1099 as->pid = get_pid(task_pid(current));
46113830
HW		 1100 as->uid = current->uid;
1101 as->euid = current->euid;
7a01955f 1102 security_task_getsecid(current, &as->secid);
93cf9b90
AS		 1103 if (!is_in) {
1104 if (copy_from_user(as->urb->transfer_buffer, uurb->buffer,
1105 as->urb->transfer_buffer_length)) {
1da177e4
LT		 1106 free_async(as);
1107 return -EFAULT;
1108 }
1109 }
e639dd3f 1110 snoop_urb(as->urb, as->userurb);
1da177e4
LT		 1111 async_newpending(as);
1112 if ((ret = usb_submit_urb(as->urb, GFP_KERNEL))) {
1113 dev_printk(KERN_DEBUG, &ps->dev->dev, "usbfs: usb_submit_urb returned %d\n", ret);
1114 async_removepending(as);
1115 free_async(as);
1116 return ret;
1117 }
1118 return 0;
1119}
1120
1121static int proc_submiturb(struct dev_state *ps, void __user *arg)
1122{
1123 struct usbdevfs_urb uurb;
1124
1125 if (copy_from_user(&uurb, arg, sizeof(uurb)))
1126 return -EFAULT;
1127
83626b01 1128 return proc_do_submiturb(ps, &uurb, (((struct usbdevfs_urb __user *)arg)->iso_frame_desc), arg);
1da177e4
LT		 1129}
1130
1131static int proc_unlinkurb(struct dev_state *ps, void __user *arg)
1132{
1133 struct async *as;
1134
1135 as = async_getpending(ps, arg);
1136 if (!as)
1137 return -EINVAL;
1138 usb_kill_urb(as->urb);
1139 return 0;
1140}
1141
1142static int processcompl(struct async *as, void __user * __user *arg)
1143{
1144 struct urb *urb = as->urb;
1145 struct usbdevfs_urb __user *userurb = as->userurb;
1146 void __user *addr = as->userurb;
1147 unsigned int i;
1148
1149 if (as->userbuffer)
1150 if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length))
1151 return -EFAULT;
e015268d 1152 if (put_user(as->status, &userurb->status))
1da177e4
LT		 1153 return -EFAULT;
1154 if (put_user(urb->actual_length, &userurb->actual_length))
1155 return -EFAULT;
1156 if (put_user(urb->error_count, &userurb->error_count))
1157 return -EFAULT;
1158
93cf9b90 1159 if (usb_endpoint_xfer_isoc(&urb->ep->desc)) {
668a9541
CL		 1160 for (i = 0; i < urb->number_of_packets; i++) {
1161 if (put_user(urb->iso_frame_desc[i].actual_length,
1162 &userurb->iso_frame_desc[i].actual_length))
1163 return -EFAULT;
1164 if (put_user(urb->iso_frame_desc[i].status,
1165 &userurb->iso_frame_desc[i].status))
1166 return -EFAULT;
1167 }
1da177e4
LT		 1168 }
1169
1170 free_async(as);
1171
1172 if (put_user(addr, (void __user * __user *)arg))
1173 return -EFAULT;
1174 return 0;
1175}
1176
1177static struct async* reap_as(struct dev_state *ps)
1178{
1179 DECLARE_WAITQUEUE(wait, current);
1180 struct async *as = NULL;
1181 struct usb_device *dev = ps->dev;
1182
1183 add_wait_queue(&ps->wait, &wait);
1184 for (;;) {
1185 __set_current_state(TASK_INTERRUPTIBLE);
1186 if ((as = async_getcompleted(ps)))
1187 break;
1188 if (signal_pending(current))
1189 break;
1190 usb_unlock_device(dev);
1191 schedule();
1192 usb_lock_device(dev);
1193 }
1194 remove_wait_queue(&ps->wait, &wait);
1195 set_current_state(TASK_RUNNING);
1196 return as;
1197}
1198
1199static int proc_reapurb(struct dev_state *ps, void __user *arg)
1200{
1201 struct async *as = reap_as(ps);
1202 if (as)
1203 return processcompl(as, (void __user * __user *)arg);
1204 if (signal_pending(current))
1205 return -EINTR;
1206 return -EIO;
1207}
1208
1209static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg)
1210{
1211 struct async *as;
1212
1213 if (!(as = async_getcompleted(ps)))
1214 return -EAGAIN;
1215 return processcompl(as, (void __user * __user *)arg);
1216}
1217
1218#ifdef CONFIG_COMPAT
1219
1220static int get_urb32(struct usbdevfs_urb *kurb,
1221 struct usbdevfs_urb32 __user *uurb)
1222{
1223 __u32 uptr;
1224 if (get_user(kurb->type, &uurb->type) ||
1225 __get_user(kurb->endpoint, &uurb->endpoint) ||
1226 __get_user(kurb->status, &uurb->status) ||
1227 __get_user(kurb->flags, &uurb->flags) ||
1228 __get_user(kurb->buffer_length, &uurb->buffer_length) ||
1229 __get_user(kurb->actual_length, &uurb->actual_length) ||
1230 __get_user(kurb->start_frame, &uurb->start_frame) ||
1231 __get_user(kurb->number_of_packets, &uurb->number_of_packets) ||
1232 __get_user(kurb->error_count, &uurb->error_count) ||
1233 __get_user(kurb->signr, &uurb->signr))
1234 return -EFAULT;
1235
1236 if (__get_user(uptr, &uurb->buffer))
1237 return -EFAULT;
1238 kurb->buffer = compat_ptr(uptr);
1239 if (__get_user(uptr, &uurb->buffer))
1240 return -EFAULT;
1241 kurb->usercontext = compat_ptr(uptr);
1242
1243 return 0;
1244}
1245
1246static int proc_submiturb_compat(struct dev_state *ps, void __user *arg)
1247{
1248 struct usbdevfs_urb uurb;
1249
c714de5d 1250 if (get_urb32(&uurb,(struct usbdevfs_urb32 __user *)arg))
1da177e4
LT		 1251 return -EFAULT;
1252
83626b01 1253 return proc_do_submiturb(ps, &uurb, ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc, arg);
1da177e4
LT		 1254}
1255
1256static int processcompl_compat(struct async *as, void __user * __user *arg)
1257{
1258 struct urb *urb = as->urb;
1259 struct usbdevfs_urb32 __user *userurb = as->userurb;
1260 void __user *addr = as->userurb;
1261 unsigned int i;
1262
1263 if (as->userbuffer)
1264 if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length))
1265 return -EFAULT;
e015268d 1266 if (put_user(as->status, &userurb->status))
1da177e4
LT		 1267 return -EFAULT;
1268 if (put_user(urb->actual_length, &userurb->actual_length))
1269 return -EFAULT;
1270 if (put_user(urb->error_count, &userurb->error_count))
1271 return -EFAULT;
1272
93cf9b90 1273 if (usb_endpoint_xfer_isoc(&urb->ep->desc)) {
668a9541
CL		 1274 for (i = 0; i < urb->number_of_packets; i++) {
1275 if (put_user(urb->iso_frame_desc[i].actual_length,
1276 &userurb->iso_frame_desc[i].actual_length))
1277 return -EFAULT;
1278 if (put_user(urb->iso_frame_desc[i].status,
1279 &userurb->iso_frame_desc[i].status))
1280 return -EFAULT;
1281 }
1da177e4
LT		 1282 }
1283
1284 free_async(as);
c714de5d 1285 if (put_user(ptr_to_compat(addr), (u32 __user *)arg))
1da177e4
LT		 1286 return -EFAULT;
1287 return 0;
1288}
1289
1290static int proc_reapurb_compat(struct dev_state *ps, void __user *arg)
1291{
1292 struct async *as = reap_as(ps);
1293 if (as)
1294 return processcompl_compat(as, (void __user * __user *)arg);
1295 if (signal_pending(current))
1296 return -EINTR;
1297 return -EIO;
1298}
1299
1300static int proc_reapurbnonblock_compat(struct dev_state *ps, void __user *arg)
1301{
1302 struct async *as;
1303
1da177e4
LT		 1304 if (!(as = async_getcompleted(ps)))
1305 return -EAGAIN;
1da177e4
LT		 1306 return processcompl_compat(as, (void __user * __user *)arg);
1307}
1308
1309#endif
1310
1311static int proc_disconnectsignal(struct dev_state *ps, void __user *arg)
1312{
1313 struct usbdevfs_disconnectsignal ds;
1314
1315 if (copy_from_user(&ds, arg, sizeof(ds)))
1316 return -EFAULT;
1317 if (ds.signr != 0 && (ds.signr < SIGRTMIN || ds.signr > SIGRTMAX))
1318 return -EINVAL;
1319 ps->discsignr = ds.signr;
1320 ps->disccontext = ds.context;
1321 return 0;
1322}
1323
1324static int proc_claiminterface(struct dev_state *ps, void __user *arg)
1325{
1326 unsigned int ifnum;
1327
1328 if (get_user(ifnum, (unsigned int __user *)arg))
1329 return -EFAULT;
1330 return claimintf(ps, ifnum);
1331}
1332
1333static int proc_releaseinterface(struct dev_state *ps, void __user *arg)
1334{
1335 unsigned int ifnum;
1336 int ret;
1337
1338 if (get_user(ifnum, (unsigned int __user *)arg))
1339 return -EFAULT;
1340 if ((ret = releaseintf(ps, ifnum)) < 0)
1341 return ret;
1342 destroy_async_on_interface (ps, ifnum);
1343 return 0;
1344}
1345
c36fc889 1346static int proc_ioctl(struct dev_state *ps, struct usbdevfs_ioctl *ctl)
1da177e4 1347{
1da177e4
LT		 1348 int size;
1349 void *buf = NULL;
1350 int retval = 0;
1351 struct usb_interface *intf = NULL;
1352 struct usb_driver *driver = NULL;
1da177e4 1353
c36fc889
PZ		 1354 /* alloc buffer */
1355 if ((size = _IOC_SIZE (ctl->ioctl_code)) > 0) {
1da177e4
LT		 1356 if ((buf = kmalloc (size, GFP_KERNEL)) == NULL)
1357 return -ENOMEM;
c36fc889
PZ		 1358 if ((_IOC_DIR(ctl->ioctl_code) & _IOC_WRITE)) {
1359 if (copy_from_user (buf, ctl->data, size)) {
6fd19f4b 1360 kfree(buf);
1da177e4
LT		 1361 return -EFAULT;
1362 }
1363 } else {
1364 memset (buf, 0, size);
1365 }
1366 }
1367
349710c3 1368 if (!connected(ps)) {
6fd19f4b 1369 kfree(buf);
1da177e4
LT		 1370 return -ENODEV;
1371 }
1372
1373 if (ps->dev->state != USB_STATE_CONFIGURED)
1374 retval = -EHOSTUNREACH;
c36fc889 1375 else if (!(intf = usb_ifnum_to_if (ps->dev, ctl->ifno)))
1da177e4 1376 retval = -EINVAL;
c36fc889 1377 else switch (ctl->ioctl_code) {
1da177e4
LT		 1378
1379 /* disconnect kernel driver from interface */
1380 case USBDEVFS_DISCONNECT:
1da177e4
LT		 1381 if (intf->dev.driver) {
1382 driver = to_usb_driver(intf->dev.driver);
1383 dev_dbg (&intf->dev, "disconnect by usbfs\n");
1384 usb_driver_release_interface(driver, intf);
1385 } else
1386 retval = -ENODATA;
1da177e4
LT		 1387 break;
1388
1389 /* let kernel drivers try to (re)bind to the interface */
1390 case USBDEVFS_CONNECT:
885e9747
AS		 1391 if (!intf->dev.driver)
1392 retval = device_attach(&intf->dev);
1393 else
1394 retval = -EBUSY;
1da177e4
LT		 1395 break;
1396
1397 /* talk directly to the interface's driver */
1398 default:
1da177e4
LT		 1399 if (intf->dev.driver)
1400 driver = to_usb_driver(intf->dev.driver);
1401 if (driver == NULL || driver->ioctl == NULL) {
1402 retval = -ENOTTY;
1403 } else {
c36fc889 1404 retval = driver->ioctl (intf, ctl->ioctl_code, buf);
1da177e4
LT		 1405 if (retval == -ENOIOCTLCMD)
1406 retval = -ENOTTY;
1407 }
1da177e4
LT		 1408 }
1409
1410 /* cleanup and return */
1411 if (retval >= 0
c36fc889 1412 && (_IOC_DIR (ctl->ioctl_code) & _IOC_READ) != 0
1da177e4 1413 && size > 0
c36fc889 1414 && copy_to_user (ctl->data, buf, size) != 0)
1da177e4 1415 retval = -EFAULT;
6fd19f4b
JJ		 1416
1417 kfree(buf);
1da177e4
LT		 1418 return retval;
1419}
1420
c36fc889
PZ		 1421static int proc_ioctl_default(struct dev_state *ps, void __user *arg)
1422{
1423 struct usbdevfs_ioctl ctrl;
1424
1425 if (copy_from_user(&ctrl, arg, sizeof (ctrl)))
1426 return -EFAULT;
1427 return proc_ioctl(ps, &ctrl);
1428}
1429
1430#ifdef CONFIG_COMPAT
777da590 1431static int proc_ioctl_compat(struct dev_state *ps, compat_uptr_t arg)
c36fc889
PZ		 1432{
1433 struct usbdevfs_ioctl32 __user *uioc;
1434 struct usbdevfs_ioctl ctrl;
1435 u32 udata;
1436
058120d7 1437 uioc = compat_ptr((long)arg);
c36fc889
PZ		 1438 if (get_user(ctrl.ifno, &uioc->ifno) ||
1439 get_user(ctrl.ioctl_code, &uioc->ioctl_code) ||
1440 __get_user(udata, &uioc->data))
1441 return -EFAULT;
1442 ctrl.data = compat_ptr(udata);
1443
1444 return proc_ioctl(ps, &ctrl);
1445}
1446#endif
1447
1da177e4
LT		 1448/*
1449 * NOTE: All requests here that have interface numbers as parameters
1450 * are assuming that somehow the configuration has been prevented from
1451 * changing. But there's no mechanism to ensure that...
1452 */
1453static int usbdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
1454{
ec17cf1c 1455 struct dev_state *ps = file->private_data;
1da177e4
LT		 1456 struct usb_device *dev = ps->dev;
1457 void __user *p = (void __user *)arg;
1458 int ret = -ENOTTY;
1459
1460 if (!(file->f_mode & FMODE_WRITE))
1461 return -EPERM;
1462 usb_lock_device(dev);
349710c3 1463 if (!connected(ps)) {
1da177e4
LT		 1464 usb_unlock_device(dev);
1465 return -ENODEV;
1466 }
1467
1468 switch (cmd) {
1469 case USBDEVFS_CONTROL:
1470 snoop(&dev->dev, "%s: CONTROL\n", __FUNCTION__);
1471 ret = proc_control(ps, p);
1472 if (ret >= 0)
1473 inode->i_mtime = CURRENT_TIME;
1474 break;
1475
1476 case USBDEVFS_BULK:
1477 snoop(&dev->dev, "%s: BULK\n", __FUNCTION__);
1478 ret = proc_bulk(ps, p);
1479 if (ret >= 0)
1480 inode->i_mtime = CURRENT_TIME;
1481 break;
1482
1483 case USBDEVFS_RESETEP:
1484 snoop(&dev->dev, "%s: RESETEP\n", __FUNCTION__);
1485 ret = proc_resetep(ps, p);
1486 if (ret >= 0)
1487 inode->i_mtime = CURRENT_TIME;
1488 break;
1489
1490 case USBDEVFS_RESET:
1491 snoop(&dev->dev, "%s: RESET\n", __FUNCTION__);
1492 ret = proc_resetdevice(ps);
1493 break;
1494
1495 case USBDEVFS_CLEAR_HALT:
1496 snoop(&dev->dev, "%s: CLEAR_HALT\n", __FUNCTION__);
1497 ret = proc_clearhalt(ps, p);
1498 if (ret >= 0)
1499 inode->i_mtime = CURRENT_TIME;
1500 break;
1501
1502 case USBDEVFS_GETDRIVER:
1503 snoop(&dev->dev, "%s: GETDRIVER\n", __FUNCTION__);
1504 ret = proc_getdriver(ps, p);
1505 break;
1506
1507 case USBDEVFS_CONNECTINFO:
1508 snoop(&dev->dev, "%s: CONNECTINFO\n", __FUNCTION__);
1509 ret = proc_connectinfo(ps, p);
1510 break;
1511
1512 case USBDEVFS_SETINTERFACE:
1513 snoop(&dev->dev, "%s: SETINTERFACE\n", __FUNCTION__);
1514 ret = proc_setintf(ps, p);
1515 break;
1516
1517 case USBDEVFS_SETCONFIGURATION:
1518 snoop(&dev->dev, "%s: SETCONFIGURATION\n", __FUNCTION__);
1519 ret = proc_setconfig(ps, p);
1520 break;
1521
1522 case USBDEVFS_SUBMITURB:
1523 snoop(&dev->dev, "%s: SUBMITURB\n", __FUNCTION__);
1524 ret = proc_submiturb(ps, p);
1525 if (ret >= 0)
1526 inode->i_mtime = CURRENT_TIME;
1527 break;
1528
1529#ifdef CONFIG_COMPAT
1530
1531 case USBDEVFS_SUBMITURB32:
1532 snoop(&dev->dev, "%s: SUBMITURB32\n", __FUNCTION__);
1533 ret = proc_submiturb_compat(ps, p);
1534 if (ret >= 0)
1535 inode->i_mtime = CURRENT_TIME;
1536 break;
1537
1538 case USBDEVFS_REAPURB32:
1539 snoop(&dev->dev, "%s: REAPURB32\n", __FUNCTION__);
1540 ret = proc_reapurb_compat(ps, p);
1541 break;
1542
1543 case USBDEVFS_REAPURBNDELAY32:
1544 snoop(&dev->dev, "%s: REAPURBDELAY32\n", __FUNCTION__);
1545 ret = proc_reapurbnonblock_compat(ps, p);
1546 break;
1547
c36fc889
PZ		 1548 case USBDEVFS_IOCTL32:
1549 snoop(&dev->dev, "%s: IOCTL\n", __FUNCTION__);
c714de5d 1550 ret = proc_ioctl_compat(ps, ptr_to_compat(p));
c36fc889 1551 break;
1da177e4
LT		 1552#endif
1553
1554 case USBDEVFS_DISCARDURB:
1555 snoop(&dev->dev, "%s: DISCARDURB\n", __FUNCTION__);
1556 ret = proc_unlinkurb(ps, p);
1557 break;
1558
1559 case USBDEVFS_REAPURB:
1560 snoop(&dev->dev, "%s: REAPURB\n", __FUNCTION__);
1561 ret = proc_reapurb(ps, p);
1562 break;
1563
1564 case USBDEVFS_REAPURBNDELAY:
1565 snoop(&dev->dev, "%s: REAPURBDELAY\n", __FUNCTION__);
1566 ret = proc_reapurbnonblock(ps, p);
1567 break;
1568
1569 case USBDEVFS_DISCSIGNAL:
1570 snoop(&dev->dev, "%s: DISCSIGNAL\n", __FUNCTION__);
1571 ret = proc_disconnectsignal(ps, p);
1572 break;
1573
1574 case USBDEVFS_CLAIMINTERFACE:
1575 snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __FUNCTION__);
1576 ret = proc_claiminterface(ps, p);
1577 break;
1578
1579 case USBDEVFS_RELEASEINTERFACE:
1580 snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __FUNCTION__);
1581 ret = proc_releaseinterface(ps, p);
1582 break;
1583
1584 case USBDEVFS_IOCTL:
1585 snoop(&dev->dev, "%s: IOCTL\n", __FUNCTION__);
c36fc889 1586 ret = proc_ioctl_default(ps, p);
1da177e4
LT		 1587 break;
1588 }
1589 usb_unlock_device(dev);
1590 if (ret >= 0)
1591 inode->i_atime = CURRENT_TIME;
1592 return ret;
1593}
1594
1595/* No kernel lock - fine */
1596static unsigned int usbdev_poll(struct file *file, struct poll_table_struct *wait)
1597{
ec17cf1c
TK		 1598 struct dev_state *ps = file->private_data;
1599 unsigned int mask = 0;
1da177e4
LT		 1600
1601 poll_wait(file, &ps->wait, wait);
1602 if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed))
1603 mask |= POLLOUT | POLLWRNORM;
349710c3 1604 if (!connected(ps))
1da177e4
LT		 1605 mask |= POLLERR | POLLHUP;
1606 return mask;
1607}
1608
9f8b17e6 1609const struct file_operations usbdev_file_operations = {
7e7654a9 1610 .owner = THIS_MODULE,
1da177e4
LT		 1611 .llseek = usbdev_lseek,
1612 .read = usbdev_read,
1613 .poll = usbdev_poll,
1614 .ioctl = usbdev_ioctl,
1615 .open = usbdev_open,
1616 .release = usbdev_release,
1617};
fbf82fd2 1618
9f8b17e6
KS		 1619#ifdef CONFIG_USB_DEVICE_CLASS
1620static struct class *usb_classdev_class;
1621
1622static int usb_classdev_add(struct usb_device *dev)
fbf82fd2
KS		 1623{
1624 int minor = ((dev->bus->busnum-1) * 128) + (dev->devnum-1);
1625
9f8b17e6 1626 dev->usb_classdev = device_create(usb_classdev_class, &dev->dev,
7bc3d635 1627 MKDEV(USB_DEVICE_MAJOR, minor),
fbf82fd2 1628 "usbdev%d.%d", dev->bus->busnum, dev->devnum);
9f8b17e6
KS		 1629 if (IS_ERR(dev->usb_classdev))
1630 return PTR_ERR(dev->usb_classdev);
fbf82fd2 1631
27d39e26 1632 return 0;
fbf82fd2
KS		 1633}
1634
9f8b17e6 1635static void usb_classdev_remove(struct usb_device *dev)
fbf82fd2 1636{
9f8b17e6 1637 device_unregister(dev->usb_classdev);
fbf82fd2
KS		 1638}
1639
9f8b17e6
KS		 1640static int usb_classdev_notify(struct notifier_block *self,
1641 unsigned long action, void *dev)
a7b986b3
GKH		 1642{
1643 switch (action) {
1644 case USB_DEVICE_ADD:
9f8b17e6 1645 if (usb_classdev_add(dev))
27d39e26 1646 return NOTIFY_BAD;
a7b986b3
GKH		 1647 break;
1648 case USB_DEVICE_REMOVE:
9f8b17e6 1649 usb_classdev_remove(dev);
a7b986b3
GKH		 1650 break;
1651 }
1652 return NOTIFY_OK;
1653}
1654
1655static struct notifier_block usbdev_nb = {
9f8b17e6 1656 .notifier_call = usb_classdev_notify,
a7b986b3 1657};
9f8b17e6 1658#endif
a7b986b3 1659
7e7654a9 1660static struct cdev usb_device_cdev;
fbf82fd2 1661
9f8b17e6 1662int __init usb_devio_init(void)
fbf82fd2
KS		 1663{
1664 int retval;
1665
fad21bdf
AS		 1666 retval = register_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX,
1667 "usb_device");
fbf82fd2
KS		 1668 if (retval) {
1669 err("unable to register minors for usb_device");
1670 goto out;
1671 }
9f8b17e6 1672 cdev_init(&usb_device_cdev, &usbdev_file_operations);
fad21bdf 1673 retval = cdev_add(&usb_device_cdev, USB_DEVICE_DEV, USB_DEVICE_MAX);
fbf82fd2
KS		 1674 if (retval) {
1675 err("unable to get usb_device major %d", USB_DEVICE_MAJOR);
a7b986b3 1676 goto error_cdev;
fbf82fd2 1677 }
9f8b17e6
KS		 1678#ifdef CONFIG_USB_DEVICE_CLASS
1679 usb_classdev_class = class_create(THIS_MODULE, "usb_device");
1680 if (IS_ERR(usb_classdev_class)) {
fbf82fd2 1681 err("unable to register usb_device class");
9f8b17e6
KS		 1682 retval = PTR_ERR(usb_classdev_class);
1683 cdev_del(&usb_device_cdev);
1684 usb_classdev_class = NULL;
1685 goto out;
fbf82fd2
KS		 1686 }
1687
a7b986b3 1688 usb_register_notify(&usbdev_nb);
9f8b17e6 1689#endif
fbf82fd2
KS		 1690out:
1691 return retval;
a7b986b3 1692
a7b986b3
GKH		 1693error_cdev:
1694 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
1695 goto out;
fbf82fd2
KS		 1696}
1697
9f8b17e6 1698void usb_devio_cleanup(void)
fbf82fd2 1699{
9f8b17e6 1700#ifdef CONFIG_USB_DEVICE_CLASS
a7b986b3 1701 usb_unregister_notify(&usbdev_nb);
9f8b17e6
KS		 1702 class_destroy(usb_classdev_class);
1703#endif
fbf82fd2 1704 cdev_del(&usb_device_cdev);
fad21bdf 1705 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
fbf82fd2 1706}
Linux kernel - Deliverables
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