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mfd: wm8350-i2c: Make sure the i2c regmap functions are compiled
[linux/fpc-iii.git] / drivers / usb / core / devio.c
bloba7b10c18759cf812357e56f99094d47ee0dbf95f
1 /*****************************************************************************/
2
3 /*
4 * devio.c -- User space communication with USB devices.
5 *
6 * Copyright (C) 1999-2000 Thomas Sailer (sailer@ife.ee.ethz.ch)
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 *
22 * This file implements the usbfs/x/y files, where
23 * x is the bus number and y the device number.
24 *
25 * It allows user space programs/"drivers" to communicate directly
26 * with USB devices without intervening kernel driver.
27 *
28 * Revision history
29 * 22.12.1999 0.1 Initial release (split from proc_usb.c)
30 * 04.01.2000 0.2 Turned into its own filesystem
31 * 30.09.2005 0.3 Fix user-triggerable oops in async URB delivery
32 * (CAN-2005-3055)
33 */
34
35 /*****************************************************************************/
36
37 #include <linux/fs.h>
38 #include <linux/mm.h>
39 #include <linux/slab.h>
40 #include <linux/signal.h>
41 #include <linux/poll.h>
42 #include <linux/module.h>
43 #include <linux/string.h>
44 #include <linux/usb.h>
45 #include <linux/usbdevice_fs.h>
46 #include <linux/usb/hcd.h> /* for usbcore internals */
47 #include <linux/cdev.h>
48 #include <linux/notifier.h>
49 #include <linux/security.h>
50 #include <linux/user_namespace.h>
51 #include <linux/scatterlist.h>
52 #include <linux/uaccess.h>
53 #include <asm/byteorder.h>
54 #include <linux/moduleparam.h>
55
56 #include "usb.h"
57
58 #define USB_MAXBUS 64
59 #define USB_DEVICE_MAX (USB_MAXBUS * 128)
60 #define USB_SG_SIZE 16384 /* split-size for large txs */
61
62 /* Mutual exclusion for removal, open, and release */
63 DEFINE_MUTEX(usbfs_mutex);
64
65 struct dev_state {
66 struct list_head list; /* state list */
67 struct usb_device *dev;
68 struct file *file;
69 spinlock_t lock; /* protects the async urb lists */
70 struct list_head async_pending;
71 struct list_head async_completed;
72 wait_queue_head_t wait; /* wake up if a request completed */
73 unsigned int discsignr;
74 struct pid *disc_pid;
75 const struct cred *cred;
76 void __user *disccontext;
77 unsigned long ifclaimed;
78 u32 secid;
79 u32 disabled_bulk_eps;
80 };
81
82 struct async {
83 struct list_head asynclist;
84 struct dev_state *ps;
85 struct pid *pid;
86 const struct cred *cred;
87 unsigned int signr;
88 unsigned int ifnum;
89 void __user *userbuffer;
90 void __user *userurb;
91 struct urb *urb;
92 unsigned int mem_usage;
93 int status;
94 u32 secid;
95 u8 bulk_addr;
96 u8 bulk_status;
97 };
98
99 static bool usbfs_snoop;
100 module_param(usbfs_snoop, bool, S_IRUGO | S_IWUSR);
101 MODULE_PARM_DESC(usbfs_snoop, "true to log all usbfs traffic");
102
103 #define snoop(dev, format, arg...) \
104 do { \
105 if (usbfs_snoop) \
106 dev_info(dev , format , ## arg); \
107 } while (0)
108
109 enum snoop_when {
110 SUBMIT, COMPLETE
111 };
112
113 #define USB_DEVICE_DEV MKDEV(USB_DEVICE_MAJOR, 0)
114
115 /* Limit on the total amount of memory we can allocate for transfers */
116 static unsigned usbfs_memory_mb = 16;
117 module_param(usbfs_memory_mb, uint, 0644);
118 MODULE_PARM_DESC(usbfs_memory_mb,
119 "maximum MB allowed for usbfs buffers (0 = no limit)");
120
121 /* Hard limit, necessary to avoid aithmetic overflow */
122 #define USBFS_XFER_MAX (UINT_MAX / 2 - 1000000)
123
124 static atomic_t usbfs_memory_usage; /* Total memory currently allocated */
125
126 /* Check whether it's okay to allocate more memory for a transfer */
127 static int usbfs_increase_memory_usage(unsigned amount)
128 {
129 unsigned lim;
130
131 /*
132 * Convert usbfs_memory_mb to bytes, avoiding overflows.
133 * 0 means use the hard limit (effectively unlimited).
134 */
135 lim = ACCESS_ONCE(usbfs_memory_mb);
136 if (lim == 0 || lim > (USBFS_XFER_MAX >> 20))
137 lim = USBFS_XFER_MAX;
138 else
139 lim <<= 20;
140
141 atomic_add(amount, &usbfs_memory_usage);
142 if (atomic_read(&usbfs_memory_usage) <= lim)
143 return 0;
144 atomic_sub(amount, &usbfs_memory_usage);
145 return -ENOMEM;
146 }
147
148 /* Memory for a transfer is being deallocated */
149 static void usbfs_decrease_memory_usage(unsigned amount)
150 {
151 atomic_sub(amount, &usbfs_memory_usage);
152 }
153
154 static int connected(struct dev_state *ps)
155 {
156 return (!list_empty(&ps->list) &&
157 ps->dev->state != USB_STATE_NOTATTACHED);
158 }
159
160 static loff_t usbdev_lseek(struct file *file, loff_t offset, int orig)
161 {
162 loff_t ret;
163
164 mutex_lock(&file_inode(file)->i_mutex);
165
166 switch (orig) {
167 case 0:
168 file->f_pos = offset;
169 ret = file->f_pos;
170 break;
171 case 1:
172 file->f_pos += offset;
173 ret = file->f_pos;
174 break;
175 case 2:
176 default:
177 ret = -EINVAL;
178 }
179
180 mutex_unlock(&file_inode(file)->i_mutex);
181 return ret;
182 }
183
184 static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes,
185 loff_t *ppos)
186 {
187 struct dev_state *ps = file->private_data;
188 struct usb_device *dev = ps->dev;
189 ssize_t ret = 0;
190 unsigned len;
191 loff_t pos;
192 int i;
193
194 pos = *ppos;
195 usb_lock_device(dev);
196 if (!connected(ps)) {
197 ret = -ENODEV;
198 goto err;
199 } else if (pos < 0) {
200 ret = -EINVAL;
201 goto err;
202 }
203
204 if (pos < sizeof(struct usb_device_descriptor)) {
205 /* 18 bytes - fits on the stack */
206 struct usb_device_descriptor temp_desc;
207
208 memcpy(&temp_desc, &dev->descriptor, sizeof(dev->descriptor));
209 le16_to_cpus(&temp_desc.bcdUSB);
210 le16_to_cpus(&temp_desc.idVendor);
211 le16_to_cpus(&temp_desc.idProduct);
212 le16_to_cpus(&temp_desc.bcdDevice);
213
214 len = sizeof(struct usb_device_descriptor) - pos;
215 if (len > nbytes)
216 len = nbytes;
217 if (copy_to_user(buf, ((char *)&temp_desc) + pos, len)) {
218 ret = -EFAULT;
219 goto err;
220 }
221
222 *ppos += len;
223 buf += len;
224 nbytes -= len;
225 ret += len;
226 }
227
228 pos = sizeof(struct usb_device_descriptor);
229 for (i = 0; nbytes && i < dev->descriptor.bNumConfigurations; i++) {
230 struct usb_config_descriptor *config =
231 (struct usb_config_descriptor *)dev->rawdescriptors[i];
232 unsigned int length = le16_to_cpu(config->wTotalLength);
233
234 if (*ppos < pos + length) {
235
236 /* The descriptor may claim to be longer than it
237 * really is. Here is the actual allocated length. */
238 unsigned alloclen =
239 le16_to_cpu(dev->config[i].desc.wTotalLength);
240
241 len = length - (*ppos - pos);
242 if (len > nbytes)
243 len = nbytes;
244
245 /* Simply don't write (skip over) unallocated parts */
246 if (alloclen > (*ppos - pos)) {
247 alloclen -= (*ppos - pos);
248 if (copy_to_user(buf,
249 dev->rawdescriptors[i] + (*ppos - pos),
250 min(len, alloclen))) {
251 ret = -EFAULT;
252 goto err;
253 }
254 }
255
256 *ppos += len;
257 buf += len;
258 nbytes -= len;
259 ret += len;
260 }
261
262 pos += length;
263 }
264
265 err:
266 usb_unlock_device(dev);
267 return ret;
268 }
269
270 /*
271 * async list handling
272 */
273
274 static struct async *alloc_async(unsigned int numisoframes)
275 {
276 struct async *as;
277
278 as = kzalloc(sizeof(struct async), GFP_KERNEL);
279 if (!as)
280 return NULL;
281 as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL);
282 if (!as->urb) {
283 kfree(as);
284 return NULL;
285 }
286 return as;
287 }
288
289 static void free_async(struct async *as)
290 {
291 int i;
292
293 put_pid(as->pid);
294 if (as->cred)
295 put_cred(as->cred);
296 for (i = 0; i < as->urb->num_sgs; i++) {
297 if (sg_page(&as->urb->sg[i]))
298 kfree(sg_virt(&as->urb->sg[i]));
299 }
300 kfree(as->urb->sg);
301 kfree(as->urb->transfer_buffer);
302 kfree(as->urb->setup_packet);
303 usb_free_urb(as->urb);
304 usbfs_decrease_memory_usage(as->mem_usage);
305 kfree(as);
306 }
307
308 static void async_newpending(struct async *as)
309 {
310 struct dev_state *ps = as->ps;
311 unsigned long flags;
312
313 spin_lock_irqsave(&ps->lock, flags);
314 list_add_tail(&as->asynclist, &ps->async_pending);
315 spin_unlock_irqrestore(&ps->lock, flags);
316 }
317
318 static void async_removepending(struct async *as)
319 {
320 struct dev_state *ps = as->ps;
321 unsigned long flags;
322
323 spin_lock_irqsave(&ps->lock, flags);
324 list_del_init(&as->asynclist);
325 spin_unlock_irqrestore(&ps->lock, flags);
326 }
327
328 static struct async *async_getcompleted(struct dev_state *ps)
329 {
330 unsigned long flags;
331 struct async *as = NULL;
332
333 spin_lock_irqsave(&ps->lock, flags);
334 if (!list_empty(&ps->async_completed)) {
335 as = list_entry(ps->async_completed.next, struct async,
336 asynclist);
337 list_del_init(&as->asynclist);
338 }
339 spin_unlock_irqrestore(&ps->lock, flags);
340 return as;
341 }
342
343 static struct async *async_getpending(struct dev_state *ps,
344 void __user *userurb)
345 {
346 struct async *as;
347
348 list_for_each_entry(as, &ps->async_pending, asynclist)
349 if (as->userurb == userurb) {
350 list_del_init(&as->asynclist);
351 return as;
352 }
353
354 return NULL;
355 }
356
357 static void snoop_urb(struct usb_device *udev,
358 void __user *userurb, int pipe, unsigned length,
359 int timeout_or_status, enum snoop_when when,
360 unsigned char *data, unsigned data_len)
361 {
362 static const char *types[] = {"isoc", "int", "ctrl", "bulk"};
363 static const char *dirs[] = {"out", "in"};
364 int ep;
365 const char *t, *d;
366
367 if (!usbfs_snoop)
368 return;
369
370 ep = usb_pipeendpoint(pipe);
371 t = types[usb_pipetype(pipe)];
372 d = dirs[!!usb_pipein(pipe)];
373
374 if (userurb) { /* Async */
375 if (when == SUBMIT)
376 dev_info(&udev->dev, "userurb %p, ep%d %s-%s, "
377 "length %u\n",
378 userurb, ep, t, d, length);
379 else
380 dev_info(&udev->dev, "userurb %p, ep%d %s-%s, "
381 "actual_length %u status %d\n",
382 userurb, ep, t, d, length,
383 timeout_or_status);
384 } else {
385 if (when == SUBMIT)
386 dev_info(&udev->dev, "ep%d %s-%s, length %u, "
387 "timeout %d\n",
388 ep, t, d, length, timeout_or_status);
389 else
390 dev_info(&udev->dev, "ep%d %s-%s, actual_length %u, "
391 "status %d\n",
392 ep, t, d, length, timeout_or_status);
393 }
394
395 if (data && data_len > 0) {
396 print_hex_dump(KERN_DEBUG, "data: ", DUMP_PREFIX_NONE, 32, 1,
397 data, data_len, 1);
398 }
399 }
400
401 static void snoop_urb_data(struct urb *urb, unsigned len)
402 {
403 int i, size;
404
405 if (!usbfs_snoop)
406 return;
407
408 if (urb->num_sgs == 0) {
409 print_hex_dump(KERN_DEBUG, "data: ", DUMP_PREFIX_NONE, 32, 1,
410 urb->transfer_buffer, len, 1);
411 return;
412 }
413
414 for (i = 0; i < urb->num_sgs && len; i++) {
415 size = (len > USB_SG_SIZE) ? USB_SG_SIZE : len;
416 print_hex_dump(KERN_DEBUG, "data: ", DUMP_PREFIX_NONE, 32, 1,
417 sg_virt(&urb->sg[i]), size, 1);
418 len -= size;
419 }
420 }
421
422 static int copy_urb_data_to_user(u8 __user *userbuffer, struct urb *urb)
423 {
424 unsigned i, len, size;
425
426 if (urb->number_of_packets > 0) /* Isochronous */
427 len = urb->transfer_buffer_length;
428 else /* Non-Isoc */
429 len = urb->actual_length;
430
431 if (urb->num_sgs == 0) {
432 if (copy_to_user(userbuffer, urb->transfer_buffer, len))
433 return -EFAULT;
434 return 0;
435 }
436
437 for (i = 0; i < urb->num_sgs && len; i++) {
438 size = (len > USB_SG_SIZE) ? USB_SG_SIZE : len;
439 if (copy_to_user(userbuffer, sg_virt(&urb->sg[i]), size))
440 return -EFAULT;
441 userbuffer += size;
442 len -= size;
443 }
444
445 return 0;
446 }
447
448 #define AS_CONTINUATION 1
449 #define AS_UNLINK 2
450
451 static void cancel_bulk_urbs(struct dev_state *ps, unsigned bulk_addr)
452 __releases(ps->lock)
453 __acquires(ps->lock)
454 {
455 struct urb *urb;
456 struct async *as;
457
458 /* Mark all the pending URBs that match bulk_addr, up to but not
459 * including the first one without AS_CONTINUATION. If such an
460 * URB is encountered then a new transfer has already started so
461 * the endpoint doesn't need to be disabled; otherwise it does.
462 */
463 list_for_each_entry(as, &ps->async_pending, asynclist) {
464 if (as->bulk_addr == bulk_addr) {
465 if (as->bulk_status != AS_CONTINUATION)
466 goto rescan;
467 as->bulk_status = AS_UNLINK;
468 as->bulk_addr = 0;
469 }
470 }
471 ps->disabled_bulk_eps |= (1 << bulk_addr);
472
473 /* Now carefully unlink all the marked pending URBs */
474 rescan:
475 list_for_each_entry(as, &ps->async_pending, asynclist) {
476 if (as->bulk_status == AS_UNLINK) {
477 as->bulk_status = 0; /* Only once */
478 urb = as->urb;
479 usb_get_urb(urb);
480 spin_unlock(&ps->lock); /* Allow completions */
481 usb_unlink_urb(urb);
482 usb_put_urb(urb);
483 spin_lock(&ps->lock);
484 goto rescan;
485 }
486 }
487 }
488
489 static void async_completed(struct urb *urb)
490 {
491 struct async *as = urb->context;
492 struct dev_state *ps = as->ps;
493 struct siginfo sinfo;
494 struct pid *pid = NULL;
495 u32 secid = 0;
496 const struct cred *cred = NULL;
497 int signr;
498
499 spin_lock(&ps->lock);
500 list_move_tail(&as->asynclist, &ps->async_completed);
501 as->status = urb->status;
502 signr = as->signr;
503 if (signr) {
504 memset(&sinfo, 0, sizeof(sinfo));
505 sinfo.si_signo = as->signr;
506 sinfo.si_errno = as->status;
507 sinfo.si_code = SI_ASYNCIO;
508 sinfo.si_addr = as->userurb;
509 pid = get_pid(as->pid);
510 cred = get_cred(as->cred);
511 secid = as->secid;
512 }
513 snoop(&urb->dev->dev, "urb complete\n");
514 snoop_urb(urb->dev, as->userurb, urb->pipe, urb->actual_length,
515 as->status, COMPLETE, NULL, 0);
516 if ((urb->transfer_flags & URB_DIR_MASK) == URB_DIR_IN)
517 snoop_urb_data(urb, urb->actual_length);
518
519 if (as->status < 0 && as->bulk_addr && as->status != -ECONNRESET &&
520 as->status != -ENOENT)
521 cancel_bulk_urbs(ps, as->bulk_addr);
522 spin_unlock(&ps->lock);
523
524 if (signr) {
525 kill_pid_info_as_cred(sinfo.si_signo, &sinfo, pid, cred, secid);
526 put_pid(pid);
527 put_cred(cred);
528 }
529
530 wake_up(&ps->wait);
531 }
532
533 static void destroy_async(struct dev_state *ps, struct list_head *list)
534 {
535 struct urb *urb;
536 struct async *as;
537 unsigned long flags;
538
539 spin_lock_irqsave(&ps->lock, flags);
540 while (!list_empty(list)) {
541 as = list_entry(list->next, struct async, asynclist);
542 list_del_init(&as->asynclist);
543 urb = as->urb;
544 usb_get_urb(urb);
545
546 /* drop the spinlock so the completion handler can run */
547 spin_unlock_irqrestore(&ps->lock, flags);
548 usb_kill_urb(urb);
549 usb_put_urb(urb);
550 spin_lock_irqsave(&ps->lock, flags);
551 }
552 spin_unlock_irqrestore(&ps->lock, flags);
553 }
554
555 static void destroy_async_on_interface(struct dev_state *ps,
556 unsigned int ifnum)
557 {
558 struct list_head *p, *q, hitlist;
559 unsigned long flags;
560
561 INIT_LIST_HEAD(&hitlist);
562 spin_lock_irqsave(&ps->lock, flags);
563 list_for_each_safe(p, q, &ps->async_pending)
564 if (ifnum == list_entry(p, struct async, asynclist)->ifnum)
565 list_move_tail(p, &hitlist);
566 spin_unlock_irqrestore(&ps->lock, flags);
567 destroy_async(ps, &hitlist);
568 }
569
570 static void destroy_all_async(struct dev_state *ps)
571 {
572 destroy_async(ps, &ps->async_pending);
573 }
574
575 /*
576 * interface claims are made only at the request of user level code,
577 * which can also release them (explicitly or by closing files).
578 * they're also undone when devices disconnect.
579 */
580
581 static int driver_probe(struct usb_interface *intf,
582 const struct usb_device_id *id)
583 {
584 return -ENODEV;
585 }
586
587 static void driver_disconnect(struct usb_interface *intf)
588 {
589 struct dev_state *ps = usb_get_intfdata(intf);
590 unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber;
591
592 if (!ps)
593 return;
594
595 /* NOTE: this relies on usbcore having canceled and completed
596 * all pending I/O requests; 2.6 does that.
597 */
598
599 if (likely(ifnum < 8*sizeof(ps->ifclaimed)))
600 clear_bit(ifnum, &ps->ifclaimed);
601 else
602 dev_warn(&intf->dev, "interface number %u out of range\n",
603 ifnum);
604
605 usb_set_intfdata(intf, NULL);
606
607 /* force async requests to complete */
608 destroy_async_on_interface(ps, ifnum);
609 }
610
611 /* The following routines are merely placeholders. There is no way
612 * to inform a user task about suspend or resumes.
613 */
614 static int driver_suspend(struct usb_interface *intf, pm_message_t msg)
615 {
616 return 0;
617 }
618
619 static int driver_resume(struct usb_interface *intf)
620 {
621 return 0;
622 }
623
624 struct usb_driver usbfs_driver = {
625 .name = "usbfs",
626 .probe = driver_probe,
627 .disconnect = driver_disconnect,
628 .suspend = driver_suspend,
629 .resume = driver_resume,
630 };
631
632 static int claimintf(struct dev_state *ps, unsigned int ifnum)
633 {
634 struct usb_device *dev = ps->dev;
635 struct usb_interface *intf;
636 int err;
637
638 if (ifnum >= 8*sizeof(ps->ifclaimed))
639 return -EINVAL;
640 /* already claimed */
641 if (test_bit(ifnum, &ps->ifclaimed))
642 return 0;
643
644 intf = usb_ifnum_to_if(dev, ifnum);
645 if (!intf)
646 err = -ENOENT;
647 else
648 err = usb_driver_claim_interface(&usbfs_driver, intf, ps);
649 if (err == 0)
650 set_bit(ifnum, &ps->ifclaimed);
651 return err;
652 }
653
654 static int releaseintf(struct dev_state *ps, unsigned int ifnum)
655 {
656 struct usb_device *dev;
657 struct usb_interface *intf;
658 int err;
659
660 err = -EINVAL;
661 if (ifnum >= 8*sizeof(ps->ifclaimed))
662 return err;
663 dev = ps->dev;
664 intf = usb_ifnum_to_if(dev, ifnum);
665 if (!intf)
666 err = -ENOENT;
667 else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) {
668 usb_driver_release_interface(&usbfs_driver, intf);
669 err = 0;
670 }
671 return err;
672 }
673
674 static int checkintf(struct dev_state *ps, unsigned int ifnum)
675 {
676 if (ps->dev->state != USB_STATE_CONFIGURED)
677 return -EHOSTUNREACH;
678 if (ifnum >= 8*sizeof(ps->ifclaimed))
679 return -EINVAL;
680 if (test_bit(ifnum, &ps->ifclaimed))
681 return 0;
682 /* if not yet claimed, claim it for the driver */
683 dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim "
684 "interface %u before use\n", task_pid_nr(current),
685 current->comm, ifnum);
686 return claimintf(ps, ifnum);
687 }
688
689 static int findintfep(struct usb_device *dev, unsigned int ep)
690 {
691 unsigned int i, j, e;
692 struct usb_interface *intf;
693 struct usb_host_interface *alts;
694 struct usb_endpoint_descriptor *endpt;
695
696 if (ep & ~(USB_DIR_IN|0xf))
697 return -EINVAL;
698 if (!dev->actconfig)
699 return -ESRCH;
700 for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) {
701 intf = dev->actconfig->interface[i];
702 for (j = 0; j < intf->num_altsetting; j++) {
703 alts = &intf->altsetting[j];
704 for (e = 0; e < alts->desc.bNumEndpoints; e++) {
705 endpt = &alts->endpoint[e].desc;
706 if (endpt->bEndpointAddress == ep)
707 return alts->desc.bInterfaceNumber;
708 }
709 }
710 }
711 return -ENOENT;
712 }
713
714 static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype,
715 unsigned int request, unsigned int index)
716 {
717 int ret = 0;
718 struct usb_host_interface *alt_setting;
719
720 if (ps->dev->state != USB_STATE_UNAUTHENTICATED
721 && ps->dev->state != USB_STATE_ADDRESS
722 && ps->dev->state != USB_STATE_CONFIGURED)
723 return -EHOSTUNREACH;
724 if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype))
725 return 0;
726
727 /*
728 * check for the special corner case 'get_device_id' in the printer
729 * class specification, which we always want to allow as it is used
730 * to query things like ink level, etc.
731 */
732 if (requesttype == 0xa1 && request == 0) {
733 alt_setting = usb_find_alt_setting(ps->dev->actconfig,
734 index >> 8, index & 0xff);
735 if (alt_setting
736 && alt_setting->desc.bInterfaceClass == USB_CLASS_PRINTER)
737 return 0;
738 }
739
740 index &= 0xff;
741 switch (requesttype & USB_RECIP_MASK) {
742 case USB_RECIP_ENDPOINT:
743 if ((index & ~USB_DIR_IN) == 0)
744 return 0;
745 ret = findintfep(ps->dev, index);
746 if (ret < 0) {
747 /*
748 * Some not fully compliant Win apps seem to get
749 * index wrong and have the endpoint number here
750 * rather than the endpoint address (with the
751 * correct direction). Win does let this through,
752 * so we'll not reject it here but leave it to
753 * the device to not break KVM. But we warn.
754 */
755 ret = findintfep(ps->dev, index ^ 0x80);
756 if (ret >= 0)
757 dev_info(&ps->dev->dev,
758 "%s: process %i (%s) requesting ep %02x but needs %02x\n",
759 __func__, task_pid_nr(current),
760 current->comm, index, index ^ 0x80);
761 }
762 if (ret >= 0)
763 ret = checkintf(ps, ret);
764 break;
765
766 case USB_RECIP_INTERFACE:
767 ret = checkintf(ps, index);
768 break;
769 }
770 return ret;
771 }
772
773 static int match_devt(struct device *dev, void *data)
774 {
775 return dev->devt == (dev_t) (unsigned long) data;
776 }
777
778 static struct usb_device *usbdev_lookup_by_devt(dev_t devt)
779 {
780 struct device *dev;
781
782 dev = bus_find_device(&usb_bus_type, NULL,
783 (void *) (unsigned long) devt, match_devt);
784 if (!dev)
785 return NULL;
786 return container_of(dev, struct usb_device, dev);
787 }
788
789 /*
790 * file operations
791 */
792 static int usbdev_open(struct inode *inode, struct file *file)
793 {
794 struct usb_device *dev = NULL;
795 struct dev_state *ps;
796 int ret;
797
798 ret = -ENOMEM;
799 ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL);
800 if (!ps)
801 goto out_free_ps;
802
803 ret = -ENODEV;
804
805 /* Protect against simultaneous removal or release */
806 mutex_lock(&usbfs_mutex);
807
808 /* usbdev device-node */
809 if (imajor(inode) == USB_DEVICE_MAJOR)
810 dev = usbdev_lookup_by_devt(inode->i_rdev);
811
812 mutex_unlock(&usbfs_mutex);
813
814 if (!dev)
815 goto out_free_ps;
816
817 usb_lock_device(dev);
818 if (dev->state == USB_STATE_NOTATTACHED)
819 goto out_unlock_device;
820
821 ret = usb_autoresume_device(dev);
822 if (ret)
823 goto out_unlock_device;
824
825 ps->dev = dev;
826 ps->file = file;
827 spin_lock_init(&ps->lock);
828 INIT_LIST_HEAD(&ps->list);
829 INIT_LIST_HEAD(&ps->async_pending);
830 INIT_LIST_HEAD(&ps->async_completed);
831 init_waitqueue_head(&ps->wait);
832 ps->discsignr = 0;
833 ps->disc_pid = get_pid(task_pid(current));
834 ps->cred = get_current_cred();
835 ps->disccontext = NULL;
836 ps->ifclaimed = 0;
837 security_task_getsecid(current, &ps->secid);
838 smp_wmb();
839 list_add_tail(&ps->list, &dev->filelist);
840 file->private_data = ps;
841 usb_unlock_device(dev);
842 snoop(&dev->dev, "opened by process %d: %s\n", task_pid_nr(current),
843 current->comm);
844 return ret;
845
846 out_unlock_device:
847 usb_unlock_device(dev);
848 usb_put_dev(dev);
849 out_free_ps:
850 kfree(ps);
851 return ret;
852 }
853
854 static int usbdev_release(struct inode *inode, struct file *file)
855 {
856 struct dev_state *ps = file->private_data;
857 struct usb_device *dev = ps->dev;
858 unsigned int ifnum;
859 struct async *as;
860
861 usb_lock_device(dev);
862 usb_hub_release_all_ports(dev, ps);
863
864 list_del_init(&ps->list);
865
866 for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed);
867 ifnum++) {
868 if (test_bit(ifnum, &ps->ifclaimed))
869 releaseintf(ps, ifnum);
870 }
871 destroy_all_async(ps);
872 usb_autosuspend_device(dev);
873 usb_unlock_device(dev);
874 usb_put_dev(dev);
875 put_pid(ps->disc_pid);
876 put_cred(ps->cred);
877
878 as = async_getcompleted(ps);
879 while (as) {
880 free_async(as);
881 as = async_getcompleted(ps);
882 }
883 kfree(ps);
884 return 0;
885 }
886
887 static int proc_control(struct dev_state *ps, void __user *arg)
888 {
889 struct usb_device *dev = ps->dev;
890 struct usbdevfs_ctrltransfer ctrl;
891 unsigned int tmo;
892 unsigned char *tbuf;
893 unsigned wLength;
894 int i, pipe, ret;
895
896 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
897 return -EFAULT;
898 ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.bRequest,
899 ctrl.wIndex);
900 if (ret)
901 return ret;
902 wLength = ctrl.wLength; /* To suppress 64k PAGE_SIZE warning */
903 if (wLength > PAGE_SIZE)
904 return -EINVAL;
905 ret = usbfs_increase_memory_usage(PAGE_SIZE + sizeof(struct urb) +
906 sizeof(struct usb_ctrlrequest));
907 if (ret)
908 return ret;
909 tbuf = (unsigned char *)__get_free_page(GFP_KERNEL);
910 if (!tbuf) {
911 ret = -ENOMEM;
912 goto done;
913 }
914 tmo = ctrl.timeout;
915 snoop(&dev->dev, "control urb: bRequestType=%02x "
916 "bRequest=%02x wValue=%04x "
917 "wIndex=%04x wLength=%04x\n",
918 ctrl.bRequestType, ctrl.bRequest,
919 __le16_to_cpup(&ctrl.wValue),
920 __le16_to_cpup(&ctrl.wIndex),
921 __le16_to_cpup(&ctrl.wLength));
922 if (ctrl.bRequestType & 0x80) {
923 if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data,
924 ctrl.wLength)) {
925 ret = -EINVAL;
926 goto done;
927 }
928 pipe = usb_rcvctrlpipe(dev, 0);
929 snoop_urb(dev, NULL, pipe, ctrl.wLength, tmo, SUBMIT, NULL, 0);
930
931 usb_unlock_device(dev);
932 i = usb_control_msg(dev, pipe, ctrl.bRequest,
933 ctrl.bRequestType, ctrl.wValue, ctrl.wIndex,
934 tbuf, ctrl.wLength, tmo);
935 usb_lock_device(dev);
936 snoop_urb(dev, NULL, pipe, max(i, 0), min(i, 0), COMPLETE,
937 tbuf, max(i, 0));
938 if ((i > 0) && ctrl.wLength) {
939 if (copy_to_user(ctrl.data, tbuf, i)) {
940 ret = -EFAULT;
941 goto done;
942 }
943 }
944 } else {
945 if (ctrl.wLength) {
946 if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) {
947 ret = -EFAULT;
948 goto done;
949 }
950 }
951 pipe = usb_sndctrlpipe(dev, 0);
952 snoop_urb(dev, NULL, pipe, ctrl.wLength, tmo, SUBMIT,
953 tbuf, ctrl.wLength);
954
955 usb_unlock_device(dev);
956 i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest,
957 ctrl.bRequestType, ctrl.wValue, ctrl.wIndex,
958 tbuf, ctrl.wLength, tmo);
959 usb_lock_device(dev);
960 snoop_urb(dev, NULL, pipe, max(i, 0), min(i, 0), COMPLETE, NULL, 0);
961 }
962 if (i < 0 && i != -EPIPE) {
963 dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL "
964 "failed cmd %s rqt %u rq %u len %u ret %d\n",
965 current->comm, ctrl.bRequestType, ctrl.bRequest,
966 ctrl.wLength, i);
967 }
968 ret = i;
969 done:
970 free_page((unsigned long) tbuf);
971 usbfs_decrease_memory_usage(PAGE_SIZE + sizeof(struct urb) +
972 sizeof(struct usb_ctrlrequest));
973 return ret;
974 }
975
976 static int proc_bulk(struct dev_state *ps, void __user *arg)
977 {
978 struct usb_device *dev = ps->dev;
979 struct usbdevfs_bulktransfer bulk;
980 unsigned int tmo, len1, pipe;
981 int len2;
982 unsigned char *tbuf;
983 int i, ret;
984
985 if (copy_from_user(&bulk, arg, sizeof(bulk)))
986 return -EFAULT;
987 ret = findintfep(ps->dev, bulk.ep);
988 if (ret < 0)
989 return ret;
990 ret = checkintf(ps, ret);
991 if (ret)
992 return ret;
993 if (bulk.ep & USB_DIR_IN)
994 pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f);
995 else
996 pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f);
997 if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN)))
998 return -EINVAL;
999 len1 = bulk.len;
1000 if (len1 >= USBFS_XFER_MAX)
1001 return -EINVAL;
1002 ret = usbfs_increase_memory_usage(len1 + sizeof(struct urb));
1003 if (ret)
1004 return ret;
1005 if (!(tbuf = kmalloc(len1, GFP_KERNEL))) {
1006 ret = -ENOMEM;
1007 goto done;
1008 }
1009 tmo = bulk.timeout;
1010 if (bulk.ep & 0x80) {
1011 if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) {
1012 ret = -EINVAL;
1013 goto done;
1014 }
1015 snoop_urb(dev, NULL, pipe, len1, tmo, SUBMIT, NULL, 0);
1016
1017 usb_unlock_device(dev);
1018 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
1019 usb_lock_device(dev);
1020 snoop_urb(dev, NULL, pipe, len2, i, COMPLETE, tbuf, len2);
1021
1022 if (!i && len2) {
1023 if (copy_to_user(bulk.data, tbuf, len2)) {
1024 ret = -EFAULT;
1025 goto done;
1026 }
1027 }
1028 } else {
1029 if (len1) {
1030 if (copy_from_user(tbuf, bulk.data, len1)) {
1031 ret = -EFAULT;
1032 goto done;
1033 }
1034 }
1035 snoop_urb(dev, NULL, pipe, len1, tmo, SUBMIT, tbuf, len1);
1036
1037 usb_unlock_device(dev);
1038 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
1039 usb_lock_device(dev);
1040 snoop_urb(dev, NULL, pipe, len2, i, COMPLETE, NULL, 0);
1041 }
1042 ret = (i < 0 ? i : len2);
1043 done:
1044 kfree(tbuf);
1045 usbfs_decrease_memory_usage(len1 + sizeof(struct urb));
1046 return ret;
1047 }
1048
1049 static int proc_resetep(struct dev_state *ps, void __user *arg)
1050 {
1051 unsigned int ep;
1052 int ret;
1053
1054 if (get_user(ep, (unsigned int __user *)arg))
1055 return -EFAULT;
1056 ret = findintfep(ps->dev, ep);
1057 if (ret < 0)
1058 return ret;
1059 ret = checkintf(ps, ret);
1060 if (ret)
1061 return ret;
1062 usb_reset_endpoint(ps->dev, ep);
1063 return 0;
1064 }
1065
1066 static int proc_clearhalt(struct dev_state *ps, void __user *arg)
1067 {
1068 unsigned int ep;
1069 int pipe;
1070 int ret;
1071
1072 if (get_user(ep, (unsigned int __user *)arg))
1073 return -EFAULT;
1074 ret = findintfep(ps->dev, ep);
1075 if (ret < 0)
1076 return ret;
1077 ret = checkintf(ps, ret);
1078 if (ret)
1079 return ret;
1080 if (ep & USB_DIR_IN)
1081 pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f);
1082 else
1083 pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f);
1084
1085 return usb_clear_halt(ps->dev, pipe);
1086 }
1087
1088 static int proc_getdriver(struct dev_state *ps, void __user *arg)
1089 {
1090 struct usbdevfs_getdriver gd;
1091 struct usb_interface *intf;
1092 int ret;
1093
1094 if (copy_from_user(&gd, arg, sizeof(gd)))
1095 return -EFAULT;
1096 intf = usb_ifnum_to_if(ps->dev, gd.interface);
1097 if (!intf || !intf->dev.driver)
1098 ret = -ENODATA;
1099 else {
1100 strlcpy(gd.driver, intf->dev.driver->name,
1101 sizeof(gd.driver));
1102 ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0);
1103 }
1104 return ret;
1105 }
1106
1107 static int proc_connectinfo(struct dev_state *ps, void __user *arg)
1108 {
1109 struct usbdevfs_connectinfo ci;
1110
1111 memset(&ci, 0, sizeof(ci));
1112 ci.devnum = ps->dev->devnum;
1113 ci.slow = ps->dev->speed == USB_SPEED_LOW;
1114
1115 if (copy_to_user(arg, &ci, sizeof(ci)))
1116 return -EFAULT;
1117 return 0;
1118 }
1119
1120 static int proc_resetdevice(struct dev_state *ps)
1121 {
1122 return usb_reset_device(ps->dev);
1123 }
1124
1125 static int proc_setintf(struct dev_state *ps, void __user *arg)
1126 {
1127 struct usbdevfs_setinterface setintf;
1128 int ret;
1129
1130 if (copy_from_user(&setintf, arg, sizeof(setintf)))
1131 return -EFAULT;
1132 if ((ret = checkintf(ps, setintf.interface)))
1133 return ret;
1134 return usb_set_interface(ps->dev, setintf.interface,
1135 setintf.altsetting);
1136 }
1137
1138 static int proc_setconfig(struct dev_state *ps, void __user *arg)
1139 {
1140 int u;
1141 int status = 0;
1142 struct usb_host_config *actconfig;
1143
1144 if (get_user(u, (int __user *)arg))
1145 return -EFAULT;
1146
1147 actconfig = ps->dev->actconfig;
1148
1149 /* Don't touch the device if any interfaces are claimed.
1150 * It could interfere with other drivers' operations, and if
1151 * an interface is claimed by usbfs it could easily deadlock.
1152 */
1153 if (actconfig) {
1154 int i;
1155
1156 for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) {
1157 if (usb_interface_claimed(actconfig->interface[i])) {
1158 dev_warn(&ps->dev->dev,
1159 "usbfs: interface %d claimed by %s "
1160 "while '%s' sets config #%d\n",
1161 actconfig->interface[i]
1162 ->cur_altsetting
1163 ->desc.bInterfaceNumber,
1164 actconfig->interface[i]
1165 ->dev.driver->name,
1166 current->comm, u);
1167 status = -EBUSY;
1168 break;
1169 }
1170 }
1171 }
1172
1173 /* SET_CONFIGURATION is often abused as a "cheap" driver reset,
1174 * so avoid usb_set_configuration()'s kick to sysfs
1175 */
1176 if (status == 0) {
1177 if (actconfig && actconfig->desc.bConfigurationValue == u)
1178 status = usb_reset_configuration(ps->dev);
1179 else
1180 status = usb_set_configuration(ps->dev, u);
1181 }
1182
1183 return status;
1184 }
1185
1186 static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
1187 struct usbdevfs_iso_packet_desc __user *iso_frame_desc,
1188 void __user *arg)
1189 {
1190 struct usbdevfs_iso_packet_desc *isopkt = NULL;
1191 struct usb_host_endpoint *ep;
1192 struct async *as = NULL;
1193 struct usb_ctrlrequest *dr = NULL;
1194 unsigned int u, totlen, isofrmlen;
1195 int i, ret, is_in, num_sgs = 0, ifnum = -1;
1196 void *buf;
1197
1198 if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP |
1199 USBDEVFS_URB_SHORT_NOT_OK |
1200 USBDEVFS_URB_BULK_CONTINUATION |
1201 USBDEVFS_URB_NO_FSBR |
1202 USBDEVFS_URB_ZERO_PACKET |
1203 USBDEVFS_URB_NO_INTERRUPT))
1204 return -EINVAL;
1205 if (uurb->buffer_length > 0 && !uurb->buffer)
1206 return -EINVAL;
1207 if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL &&
1208 (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) {
1209 ifnum = findintfep(ps->dev, uurb->endpoint);
1210 if (ifnum < 0)
1211 return ifnum;
1212 ret = checkintf(ps, ifnum);
1213 if (ret)
1214 return ret;
1215 }
1216 if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0) {
1217 is_in = 1;
1218 ep = ps->dev->ep_in[uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
1219 } else {
1220 is_in = 0;
1221 ep = ps->dev->ep_out[uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
1222 }
1223 if (!ep)
1224 return -ENOENT;
1225
1226 u = 0;
1227 switch(uurb->type) {
1228 case USBDEVFS_URB_TYPE_CONTROL:
1229 if (!usb_endpoint_xfer_control(&ep->desc))
1230 return -EINVAL;
1231 /* min 8 byte setup packet */
1232 if (uurb->buffer_length < 8)
1233 return -EINVAL;
1234 dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL);
1235 if (!dr)
1236 return -ENOMEM;
1237 if (copy_from_user(dr, uurb->buffer, 8)) {
1238 ret = -EFAULT;
1239 goto error;
1240 }
1241 if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) {
1242 ret = -EINVAL;
1243 goto error;
1244 }
1245 ret = check_ctrlrecip(ps, dr->bRequestType, dr->bRequest,
1246 le16_to_cpup(&dr->wIndex));
1247 if (ret)
1248 goto error;
1249 uurb->number_of_packets = 0;
1250 uurb->buffer_length = le16_to_cpup(&dr->wLength);
1251 uurb->buffer += 8;
1252 if ((dr->bRequestType & USB_DIR_IN) && uurb->buffer_length) {
1253 is_in = 1;
1254 uurb->endpoint |= USB_DIR_IN;
1255 } else {
1256 is_in = 0;
1257 uurb->endpoint &= ~USB_DIR_IN;
1258 }
1259 snoop(&ps->dev->dev, "control urb: bRequestType=%02x "
1260 "bRequest=%02x wValue=%04x "
1261 "wIndex=%04x wLength=%04x\n",
1262 dr->bRequestType, dr->bRequest,
1263 __le16_to_cpup(&dr->wValue),
1264 __le16_to_cpup(&dr->wIndex),
1265 __le16_to_cpup(&dr->wLength));
1266 u = sizeof(struct usb_ctrlrequest);
1267 break;
1268
1269 case USBDEVFS_URB_TYPE_BULK:
1270 switch (usb_endpoint_type(&ep->desc)) {
1271 case USB_ENDPOINT_XFER_CONTROL:
1272 case USB_ENDPOINT_XFER_ISOC:
1273 return -EINVAL;
1274 case USB_ENDPOINT_XFER_INT:
1275 /* allow single-shot interrupt transfers */
1276 uurb->type = USBDEVFS_URB_TYPE_INTERRUPT;
1277 goto interrupt_urb;
1278 }
1279 uurb->number_of_packets = 0;
1280 num_sgs = DIV_ROUND_UP(uurb->buffer_length, USB_SG_SIZE);
1281 if (num_sgs == 1 || num_sgs > ps->dev->bus->sg_tablesize)
1282 num_sgs = 0;
1283 break;
1284
1285 case USBDEVFS_URB_TYPE_INTERRUPT:
1286 if (!usb_endpoint_xfer_int(&ep->desc))
1287 return -EINVAL;
1288 interrupt_urb:
1289 uurb->number_of_packets = 0;
1290 break;
1291
1292 case USBDEVFS_URB_TYPE_ISO:
1293 /* arbitrary limit */
1294 if (uurb->number_of_packets < 1 ||
1295 uurb->number_of_packets > 128)
1296 return -EINVAL;
1297 if (!usb_endpoint_xfer_isoc(&ep->desc))
1298 return -EINVAL;
1299 isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) *
1300 uurb->number_of_packets;
1301 if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL)))
1302 return -ENOMEM;
1303 if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) {
1304 ret = -EFAULT;
1305 goto error;
1306 }
1307 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
1308 /*
1309 * arbitrary limit need for USB 3.0
1310 * bMaxBurst (0~15 allowed, 1~16 packets)
1311 * bmAttributes (bit 1:0, mult 0~2, 1~3 packets)
1312 * sizemax: 1024 * 16 * 3 = 49152
1313 */
1314 if (isopkt[u].length > 49152) {
1315 ret = -EINVAL;
1316 goto error;
1317 }
1318 totlen += isopkt[u].length;
1319 }
1320 u *= sizeof(struct usb_iso_packet_descriptor);
1321 uurb->buffer_length = totlen;
1322 break;
1323
1324 default:
1325 return -EINVAL;
1326 }
1327
1328 if (uurb->buffer_length >= USBFS_XFER_MAX) {
1329 ret = -EINVAL;
1330 goto error;
1331 }
1332 if (uurb->buffer_length > 0 &&
1333 !access_ok(is_in ? VERIFY_WRITE : VERIFY_READ,
1334 uurb->buffer, uurb->buffer_length)) {
1335 ret = -EFAULT;
1336 goto error;
1337 }
1338 as = alloc_async(uurb->number_of_packets);
1339 if (!as) {
1340 ret = -ENOMEM;
1341 goto error;
1342 }
1343
1344 u += sizeof(struct async) + sizeof(struct urb) + uurb->buffer_length +
1345 num_sgs * sizeof(struct scatterlist);
1346 ret = usbfs_increase_memory_usage(u);
1347 if (ret)
1348 goto error;
1349 as->mem_usage = u;
1350
1351 if (num_sgs) {
1352 as->urb->sg = kmalloc(num_sgs * sizeof(struct scatterlist),
1353 GFP_KERNEL);
1354 if (!as->urb->sg) {
1355 ret = -ENOMEM;
1356 goto error;
1357 }
1358 as->urb->num_sgs = num_sgs;
1359 sg_init_table(as->urb->sg, as->urb->num_sgs);
1360
1361 totlen = uurb->buffer_length;
1362 for (i = 0; i < as->urb->num_sgs; i++) {
1363 u = (totlen > USB_SG_SIZE) ? USB_SG_SIZE : totlen;
1364 buf = kmalloc(u, GFP_KERNEL);
1365 if (!buf) {
1366 ret = -ENOMEM;
1367 goto error;
1368 }
1369 sg_set_buf(&as->urb->sg[i], buf, u);
1370
1371 if (!is_in) {
1372 if (copy_from_user(buf, uurb->buffer, u)) {
1373 ret = -EFAULT;
1374 goto error;
1375 }
1376 uurb->buffer += u;
1377 }
1378 totlen -= u;
1379 }
1380 } else if (uurb->buffer_length > 0) {
1381 as->urb->transfer_buffer = kmalloc(uurb->buffer_length,
1382 GFP_KERNEL);
1383 if (!as->urb->transfer_buffer) {
1384 ret = -ENOMEM;
1385 goto error;
1386 }
1387
1388 if (!is_in) {
1389 if (copy_from_user(as->urb->transfer_buffer,
1390 uurb->buffer,
1391 uurb->buffer_length)) {
1392 ret = -EFAULT;
1393 goto error;
1394 }
1395 } else if (uurb->type == USBDEVFS_URB_TYPE_ISO) {
1396 /*
1397 * Isochronous input data may end up being
1398 * discontiguous if some of the packets are short.
1399 * Clear the buffer so that the gaps don't leak
1400 * kernel data to userspace.
1401 */
1402 memset(as->urb->transfer_buffer, 0,
1403 uurb->buffer_length);
1404 }
1405 }
1406 as->urb->dev = ps->dev;
1407 as->urb->pipe = (uurb->type << 30) |
1408 __create_pipe(ps->dev, uurb->endpoint & 0xf) |
1409 (uurb->endpoint & USB_DIR_IN);
1410
1411 /* This tedious sequence is necessary because the URB_* flags
1412 * are internal to the kernel and subject to change, whereas
1413 * the USBDEVFS_URB_* flags are a user API and must not be changed.
1414 */
1415 u = (is_in ? URB_DIR_IN : URB_DIR_OUT);
1416 if (uurb->flags & USBDEVFS_URB_ISO_ASAP)
1417 u |= URB_ISO_ASAP;
1418 if (uurb->flags & USBDEVFS_URB_SHORT_NOT_OK && is_in)
1419 u |= URB_SHORT_NOT_OK;
1420 if (uurb->flags & USBDEVFS_URB_NO_FSBR)
1421 u |= URB_NO_FSBR;
1422 if (uurb->flags & USBDEVFS_URB_ZERO_PACKET)
1423 u |= URB_ZERO_PACKET;
1424 if (uurb->flags & USBDEVFS_URB_NO_INTERRUPT)
1425 u |= URB_NO_INTERRUPT;
1426 as->urb->transfer_flags = u;
1427
1428 as->urb->transfer_buffer_length = uurb->buffer_length;
1429 as->urb->setup_packet = (unsigned char *)dr;
1430 dr = NULL;
1431 as->urb->start_frame = uurb->start_frame;
1432 as->urb->number_of_packets = uurb->number_of_packets;
1433 if (uurb->type == USBDEVFS_URB_TYPE_ISO ||
1434 ps->dev->speed == USB_SPEED_HIGH)
1435 as->urb->interval = 1 << min(15, ep->desc.bInterval - 1);
1436 else
1437 as->urb->interval = ep->desc.bInterval;
1438 as->urb->context = as;
1439 as->urb->complete = async_completed;
1440 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
1441 as->urb->iso_frame_desc[u].offset = totlen;
1442 as->urb->iso_frame_desc[u].length = isopkt[u].length;
1443 totlen += isopkt[u].length;
1444 }
1445 kfree(isopkt);
1446 isopkt = NULL;
1447 as->ps = ps;
1448 as->userurb = arg;
1449 if (is_in && uurb->buffer_length > 0)
1450 as->userbuffer = uurb->buffer;
1451 else
1452 as->userbuffer = NULL;
1453 as->signr = uurb->signr;
1454 as->ifnum = ifnum;
1455 as->pid = get_pid(task_pid(current));
1456 as->cred = get_current_cred();
1457 security_task_getsecid(current, &as->secid);
1458 snoop_urb(ps->dev, as->userurb, as->urb->pipe,
1459 as->urb->transfer_buffer_length, 0, SUBMIT,
1460 NULL, 0);
1461 if (!is_in)
1462 snoop_urb_data(as->urb, as->urb->transfer_buffer_length);
1463
1464 async_newpending(as);
1465
1466 if (usb_endpoint_xfer_bulk(&ep->desc)) {
1467 spin_lock_irq(&ps->lock);
1468
1469 /* Not exactly the endpoint address; the direction bit is
1470 * shifted to the 0x10 position so that the value will be
1471 * between 0 and 31.
1472 */
1473 as->bulk_addr = usb_endpoint_num(&ep->desc) |
1474 ((ep->desc.bEndpointAddress & USB_ENDPOINT_DIR_MASK)
1475 >> 3);
1476
1477 /* If this bulk URB is the start of a new transfer, re-enable
1478 * the endpoint. Otherwise mark it as a continuation URB.
1479 */
1480 if (uurb->flags & USBDEVFS_URB_BULK_CONTINUATION)
1481 as->bulk_status = AS_CONTINUATION;
1482 else
1483 ps->disabled_bulk_eps &= ~(1 << as->bulk_addr);
1484
1485 /* Don't accept continuation URBs if the endpoint is
1486 * disabled because of an earlier error.
1487 */
1488 if (ps->disabled_bulk_eps & (1 << as->bulk_addr))
1489 ret = -EREMOTEIO;
1490 else
1491 ret = usb_submit_urb(as->urb, GFP_ATOMIC);
1492 spin_unlock_irq(&ps->lock);
1493 } else {
1494 ret = usb_submit_urb(as->urb, GFP_KERNEL);
1495 }
1496
1497 if (ret) {
1498 dev_printk(KERN_DEBUG, &ps->dev->dev,
1499 "usbfs: usb_submit_urb returned %d\n", ret);
1500 snoop_urb(ps->dev, as->userurb, as->urb->pipe,
1501 0, ret, COMPLETE, NULL, 0);
1502 async_removepending(as);
1503 goto error;
1504 }
1505 return 0;
1506
1507 error:
1508 kfree(isopkt);
1509 kfree(dr);
1510 if (as)
1511 free_async(as);
1512 return ret;
1513 }
1514
1515 static int proc_submiturb(struct dev_state *ps, void __user *arg)
1516 {
1517 struct usbdevfs_urb uurb;
1518
1519 if (copy_from_user(&uurb, arg, sizeof(uurb)))
1520 return -EFAULT;
1521
1522 return proc_do_submiturb(ps, &uurb,
1523 (((struct usbdevfs_urb __user *)arg)->iso_frame_desc),
1524 arg);
1525 }
1526
1527 static int proc_unlinkurb(struct dev_state *ps, void __user *arg)
1528 {
1529 struct urb *urb;
1530 struct async *as;
1531 unsigned long flags;
1532
1533 spin_lock_irqsave(&ps->lock, flags);
1534 as = async_getpending(ps, arg);
1535 if (!as) {
1536 spin_unlock_irqrestore(&ps->lock, flags);
1537 return -EINVAL;
1538 }
1539
1540 urb = as->urb;
1541 usb_get_urb(urb);
1542 spin_unlock_irqrestore(&ps->lock, flags);
1543
1544 usb_kill_urb(urb);
1545 usb_put_urb(urb);
1546
1547 return 0;
1548 }
1549
1550 static int processcompl(struct async *as, void __user * __user *arg)
1551 {
1552 struct urb *urb = as->urb;
1553 struct usbdevfs_urb __user *userurb = as->userurb;
1554 void __user *addr = as->userurb;
1555 unsigned int i;
1556
1557 if (as->userbuffer && urb->actual_length) {
1558 if (copy_urb_data_to_user(as->userbuffer, urb))
1559 goto err_out;
1560 }
1561 if (put_user(as->status, &userurb->status))
1562 goto err_out;
1563 if (put_user(urb->actual_length, &userurb->actual_length))
1564 goto err_out;
1565 if (put_user(urb->error_count, &userurb->error_count))
1566 goto err_out;
1567
1568 if (usb_endpoint_xfer_isoc(&urb->ep->desc)) {
1569 for (i = 0; i < urb->number_of_packets; i++) {
1570 if (put_user(urb->iso_frame_desc[i].actual_length,
1571 &userurb->iso_frame_desc[i].actual_length))
1572 goto err_out;
1573 if (put_user(urb->iso_frame_desc[i].status,
1574 &userurb->iso_frame_desc[i].status))
1575 goto err_out;
1576 }
1577 }
1578
1579 if (put_user(addr, (void __user * __user *)arg))
1580 return -EFAULT;
1581 return 0;
1582
1583 err_out:
1584 return -EFAULT;
1585 }
1586
1587 static struct async *reap_as(struct dev_state *ps)
1588 {
1589 DECLARE_WAITQUEUE(wait, current);
1590 struct async *as = NULL;
1591 struct usb_device *dev = ps->dev;
1592
1593 add_wait_queue(&ps->wait, &wait);
1594 for (;;) {
1595 __set_current_state(TASK_INTERRUPTIBLE);
1596 as = async_getcompleted(ps);
1597 if (as || !connected(ps))
1598 break;
1599 if (signal_pending(current))
1600 break;
1601 usb_unlock_device(dev);
1602 schedule();
1603 usb_lock_device(dev);
1604 }
1605 remove_wait_queue(&ps->wait, &wait);
1606 set_current_state(TASK_RUNNING);
1607 return as;
1608 }
1609
1610 static int proc_reapurb(struct dev_state *ps, void __user *arg)
1611 {
1612 struct async *as = reap_as(ps);
1613 if (as) {
1614 int retval = processcompl(as, (void __user * __user *)arg);
1615 free_async(as);
1616 return retval;
1617 }
1618 if (signal_pending(current))
1619 return -EINTR;
1620 return -ENODEV;
1621 }
1622
1623 static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg)
1624 {
1625 int retval;
1626 struct async *as;
1627
1628 as = async_getcompleted(ps);
1629 if (as) {
1630 retval = processcompl(as, (void __user * __user *)arg);
1631 free_async(as);
1632 } else {
1633 retval = (connected(ps) ? -EAGAIN : -ENODEV);
1634 }
1635 return retval;
1636 }
1637
1638 #ifdef CONFIG_COMPAT
1639 static int proc_control_compat(struct dev_state *ps,
1640 struct usbdevfs_ctrltransfer32 __user *p32)
1641 {
1642 struct usbdevfs_ctrltransfer __user *p;
1643 __u32 udata;
1644 p = compat_alloc_user_space(sizeof(*p));
1645 if (copy_in_user(p, p32, (sizeof(*p32) - sizeof(compat_caddr_t))) ||
1646 get_user(udata, &p32->data) ||
1647 put_user(compat_ptr(udata), &p->data))
1648 return -EFAULT;
1649 return proc_control(ps, p);
1650 }
1651
1652 static int proc_bulk_compat(struct dev_state *ps,
1653 struct usbdevfs_bulktransfer32 __user *p32)
1654 {
1655 struct usbdevfs_bulktransfer __user *p;
1656 compat_uint_t n;
1657 compat_caddr_t addr;
1658
1659 p = compat_alloc_user_space(sizeof(*p));
1660
1661 if (get_user(n, &p32->ep) || put_user(n, &p->ep) ||
1662 get_user(n, &p32->len) || put_user(n, &p->len) ||
1663 get_user(n, &p32->timeout) || put_user(n, &p->timeout) ||
1664 get_user(addr, &p32->data) || put_user(compat_ptr(addr), &p->data))
1665 return -EFAULT;
1666
1667 return proc_bulk(ps, p);
1668 }
1669 static int proc_disconnectsignal_compat(struct dev_state *ps, void __user *arg)
1670 {
1671 struct usbdevfs_disconnectsignal32 ds;
1672
1673 if (copy_from_user(&ds, arg, sizeof(ds)))
1674 return -EFAULT;
1675 ps->discsignr = ds.signr;
1676 ps->disccontext = compat_ptr(ds.context);
1677 return 0;
1678 }
1679
1680 static int get_urb32(struct usbdevfs_urb *kurb,
1681 struct usbdevfs_urb32 __user *uurb)
1682 {
1683 __u32 uptr;
1684 if (!access_ok(VERIFY_READ, uurb, sizeof(*uurb)) ||
1685 __get_user(kurb->type, &uurb->type) ||
1686 __get_user(kurb->endpoint, &uurb->endpoint) ||
1687 __get_user(kurb->status, &uurb->status) ||
1688 __get_user(kurb->flags, &uurb->flags) ||
1689 __get_user(kurb->buffer_length, &uurb->buffer_length) ||
1690 __get_user(kurb->actual_length, &uurb->actual_length) ||
1691 __get_user(kurb->start_frame, &uurb->start_frame) ||
1692 __get_user(kurb->number_of_packets, &uurb->number_of_packets) ||
1693 __get_user(kurb->error_count, &uurb->error_count) ||
1694 __get_user(kurb->signr, &uurb->signr))
1695 return -EFAULT;
1696
1697 if (__get_user(uptr, &uurb->buffer))
1698 return -EFAULT;
1699 kurb->buffer = compat_ptr(uptr);
1700 if (__get_user(uptr, &uurb->usercontext))
1701 return -EFAULT;
1702 kurb->usercontext = compat_ptr(uptr);
1703
1704 return 0;
1705 }
1706
1707 static int proc_submiturb_compat(struct dev_state *ps, void __user *arg)
1708 {
1709 struct usbdevfs_urb uurb;
1710
1711 if (get_urb32(&uurb, (struct usbdevfs_urb32 __user *)arg))
1712 return -EFAULT;
1713
1714 return proc_do_submiturb(ps, &uurb,
1715 ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc,
1716 arg);
1717 }
1718
1719 static int processcompl_compat(struct async *as, void __user * __user *arg)
1720 {
1721 struct urb *urb = as->urb;
1722 struct usbdevfs_urb32 __user *userurb = as->userurb;
1723 void __user *addr = as->userurb;
1724 unsigned int i;
1725
1726 if (as->userbuffer && urb->actual_length) {
1727 if (copy_urb_data_to_user(as->userbuffer, urb))
1728 return -EFAULT;
1729 }
1730 if (put_user(as->status, &userurb->status))
1731 return -EFAULT;
1732 if (put_user(urb->actual_length, &userurb->actual_length))
1733 return -EFAULT;
1734 if (put_user(urb->error_count, &userurb->error_count))
1735 return -EFAULT;
1736
1737 if (usb_endpoint_xfer_isoc(&urb->ep->desc)) {
1738 for (i = 0; i < urb->number_of_packets; i++) {
1739 if (put_user(urb->iso_frame_desc[i].actual_length,
1740 &userurb->iso_frame_desc[i].actual_length))
1741 return -EFAULT;
1742 if (put_user(urb->iso_frame_desc[i].status,
1743 &userurb->iso_frame_desc[i].status))
1744 return -EFAULT;
1745 }
1746 }
1747
1748 if (put_user(ptr_to_compat(addr), (u32 __user *)arg))
1749 return -EFAULT;
1750 return 0;
1751 }
1752
1753 static int proc_reapurb_compat(struct dev_state *ps, void __user *arg)
1754 {
1755 struct async *as = reap_as(ps);
1756 if (as) {
1757 int retval = processcompl_compat(as, (void __user * __user *)arg);
1758 free_async(as);
1759 return retval;
1760 }
1761 if (signal_pending(current))
1762 return -EINTR;
1763 return -ENODEV;
1764 }
1765
1766 static int proc_reapurbnonblock_compat(struct dev_state *ps, void __user *arg)
1767 {
1768 int retval;
1769 struct async *as;
1770
1771 as = async_getcompleted(ps);
1772 if (as) {
1773 retval = processcompl_compat(as, (void __user * __user *)arg);
1774 free_async(as);
1775 } else {
1776 retval = (connected(ps) ? -EAGAIN : -ENODEV);
1777 }
1778 return retval;
1779 }
1780
1781
1782 #endif
1783
1784 static int proc_disconnectsignal(struct dev_state *ps, void __user *arg)
1785 {
1786 struct usbdevfs_disconnectsignal ds;
1787
1788 if (copy_from_user(&ds, arg, sizeof(ds)))
1789 return -EFAULT;
1790 ps->discsignr = ds.signr;
1791 ps->disccontext = ds.context;
1792 return 0;
1793 }
1794
1795 static int proc_claiminterface(struct dev_state *ps, void __user *arg)
1796 {
1797 unsigned int ifnum;
1798
1799 if (get_user(ifnum, (unsigned int __user *)arg))
1800 return -EFAULT;
1801 return claimintf(ps, ifnum);
1802 }
1803
1804 static int proc_releaseinterface(struct dev_state *ps, void __user *arg)
1805 {
1806 unsigned int ifnum;
1807 int ret;
1808
1809 if (get_user(ifnum, (unsigned int __user *)arg))
1810 return -EFAULT;
1811 if ((ret = releaseintf(ps, ifnum)) < 0)
1812 return ret;
1813 destroy_async_on_interface (ps, ifnum);
1814 return 0;
1815 }
1816
1817 static int proc_ioctl(struct dev_state *ps, struct usbdevfs_ioctl *ctl)
1818 {
1819 int size;
1820 void *buf = NULL;
1821 int retval = 0;
1822 struct usb_interface *intf = NULL;
1823 struct usb_driver *driver = NULL;
1824
1825 /* alloc buffer */
1826 if ((size = _IOC_SIZE(ctl->ioctl_code)) > 0) {
1827 buf = kmalloc(size, GFP_KERNEL);
1828 if (buf == NULL)
1829 return -ENOMEM;
1830 if ((_IOC_DIR(ctl->ioctl_code) & _IOC_WRITE)) {
1831 if (copy_from_user(buf, ctl->data, size)) {
1832 kfree(buf);
1833 return -EFAULT;
1834 }
1835 } else {
1836 memset(buf, 0, size);
1837 }
1838 }
1839
1840 if (!connected(ps)) {
1841 kfree(buf);
1842 return -ENODEV;
1843 }
1844
1845 if (ps->dev->state != USB_STATE_CONFIGURED)
1846 retval = -EHOSTUNREACH;
1847 else if (!(intf = usb_ifnum_to_if(ps->dev, ctl->ifno)))
1848 retval = -EINVAL;
1849 else switch (ctl->ioctl_code) {
1850
1851 /* disconnect kernel driver from interface */
1852 case USBDEVFS_DISCONNECT:
1853 if (intf->dev.driver) {
1854 driver = to_usb_driver(intf->dev.driver);
1855 dev_dbg(&intf->dev, "disconnect by usbfs\n");
1856 usb_driver_release_interface(driver, intf);
1857 } else
1858 retval = -ENODATA;
1859 break;
1860
1861 /* let kernel drivers try to (re)bind to the interface */
1862 case USBDEVFS_CONNECT:
1863 if (!intf->dev.driver)
1864 retval = device_attach(&intf->dev);
1865 else
1866 retval = -EBUSY;
1867 break;
1868
1869 /* talk directly to the interface's driver */
1870 default:
1871 if (intf->dev.driver)
1872 driver = to_usb_driver(intf->dev.driver);
1873 if (driver == NULL || driver->unlocked_ioctl == NULL) {
1874 retval = -ENOTTY;
1875 } else {
1876 retval = driver->unlocked_ioctl(intf, ctl->ioctl_code, buf);
1877 if (retval == -ENOIOCTLCMD)
1878 retval = -ENOTTY;
1879 }
1880 }
1881
1882 /* cleanup and return */
1883 if (retval >= 0
1884 && (_IOC_DIR(ctl->ioctl_code) & _IOC_READ) != 0
1885 && size > 0
1886 && copy_to_user(ctl->data, buf, size) != 0)
1887 retval = -EFAULT;
1888
1889 kfree(buf);
1890 return retval;
1891 }
1892
1893 static int proc_ioctl_default(struct dev_state *ps, void __user *arg)
1894 {
1895 struct usbdevfs_ioctl ctrl;
1896
1897 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
1898 return -EFAULT;
1899 return proc_ioctl(ps, &ctrl);
1900 }
1901
1902 #ifdef CONFIG_COMPAT
1903 static int proc_ioctl_compat(struct dev_state *ps, compat_uptr_t arg)
1904 {
1905 struct usbdevfs_ioctl32 __user *uioc;
1906 struct usbdevfs_ioctl ctrl;
1907 u32 udata;
1908
1909 uioc = compat_ptr((long)arg);
1910 if (!access_ok(VERIFY_READ, uioc, sizeof(*uioc)) ||
1911 __get_user(ctrl.ifno, &uioc->ifno) ||
1912 __get_user(ctrl.ioctl_code, &uioc->ioctl_code) ||
1913 __get_user(udata, &uioc->data))
1914 return -EFAULT;
1915 ctrl.data = compat_ptr(udata);
1916
1917 return proc_ioctl(ps, &ctrl);
1918 }
1919 #endif
1920
1921 static int proc_claim_port(struct dev_state *ps, void __user *arg)
1922 {
1923 unsigned portnum;
1924 int rc;
1925
1926 if (get_user(portnum, (unsigned __user *) arg))
1927 return -EFAULT;
1928 rc = usb_hub_claim_port(ps->dev, portnum, ps);
1929 if (rc == 0)
1930 snoop(&ps->dev->dev, "port %d claimed by process %d: %s\n",
1931 portnum, task_pid_nr(current), current->comm);
1932 return rc;
1933 }
1934
1935 static int proc_release_port(struct dev_state *ps, void __user *arg)
1936 {
1937 unsigned portnum;
1938
1939 if (get_user(portnum, (unsigned __user *) arg))
1940 return -EFAULT;
1941 return usb_hub_release_port(ps->dev, portnum, ps);
1942 }
1943
1944 static int proc_get_capabilities(struct dev_state *ps, void __user *arg)
1945 {
1946 __u32 caps;
1947
1948 caps = USBDEVFS_CAP_ZERO_PACKET | USBDEVFS_CAP_NO_PACKET_SIZE_LIM |
1949 USBDEVFS_CAP_REAP_AFTER_DISCONNECT;
1950 if (!ps->dev->bus->no_stop_on_short)
1951 caps |= USBDEVFS_CAP_BULK_CONTINUATION;
1952 if (ps->dev->bus->sg_tablesize)
1953 caps |= USBDEVFS_CAP_BULK_SCATTER_GATHER;
1954
1955 if (put_user(caps, (__u32 __user *)arg))
1956 return -EFAULT;
1957
1958 return 0;
1959 }
1960
1961 static int proc_disconnect_claim(struct dev_state *ps, void __user *arg)
1962 {
1963 struct usbdevfs_disconnect_claim dc;
1964 struct usb_interface *intf;
1965
1966 if (copy_from_user(&dc, arg, sizeof(dc)))
1967 return -EFAULT;
1968
1969 intf = usb_ifnum_to_if(ps->dev, dc.interface);
1970 if (!intf)
1971 return -EINVAL;
1972
1973 if (intf->dev.driver) {
1974 struct usb_driver *driver = to_usb_driver(intf->dev.driver);
1975
1976 if ((dc.flags & USBDEVFS_DISCONNECT_CLAIM_IF_DRIVER) &&
1977 strncmp(dc.driver, intf->dev.driver->name,
1978 sizeof(dc.driver)) != 0)
1979 return -EBUSY;
1980
1981 if ((dc.flags & USBDEVFS_DISCONNECT_CLAIM_EXCEPT_DRIVER) &&
1982 strncmp(dc.driver, intf->dev.driver->name,
1983 sizeof(dc.driver)) == 0)
1984 return -EBUSY;
1985
1986 dev_dbg(&intf->dev, "disconnect by usbfs\n");
1987 usb_driver_release_interface(driver, intf);
1988 }
1989
1990 return claimintf(ps, dc.interface);
1991 }
1992
1993 /*
1994 * NOTE: All requests here that have interface numbers as parameters
1995 * are assuming that somehow the configuration has been prevented from
1996 * changing. But there's no mechanism to ensure that...
1997 */
1998 static long usbdev_do_ioctl(struct file *file, unsigned int cmd,
1999 void __user *p)
2000 {
2001 struct dev_state *ps = file->private_data;
2002 struct inode *inode = file_inode(file);
2003 struct usb_device *dev = ps->dev;
2004 int ret = -ENOTTY;
2005
2006 if (!(file->f_mode & FMODE_WRITE))
2007 return -EPERM;
2008
2009 usb_lock_device(dev);
2010
2011 /* Reap operations are allowed even after disconnection */
2012 switch (cmd) {
2013 case USBDEVFS_REAPURB:
2014 snoop(&dev->dev, "%s: REAPURB\n", __func__);
2015 ret = proc_reapurb(ps, p);
2016 goto done;
2017
2018 case USBDEVFS_REAPURBNDELAY:
2019 snoop(&dev->dev, "%s: REAPURBNDELAY\n", __func__);
2020 ret = proc_reapurbnonblock(ps, p);
2021 goto done;
2022
2023 #ifdef CONFIG_COMPAT
2024 case USBDEVFS_REAPURB32:
2025 snoop(&dev->dev, "%s: REAPURB32\n", __func__);
2026 ret = proc_reapurb_compat(ps, p);
2027 goto done;
2028
2029 case USBDEVFS_REAPURBNDELAY32:
2030 snoop(&dev->dev, "%s: REAPURBNDELAY32\n", __func__);
2031 ret = proc_reapurbnonblock_compat(ps, p);
2032 goto done;
2033 #endif
2034 }
2035
2036 if (!connected(ps)) {
2037 usb_unlock_device(dev);
2038 return -ENODEV;
2039 }
2040
2041 switch (cmd) {
2042 case USBDEVFS_CONTROL:
2043 snoop(&dev->dev, "%s: CONTROL\n", __func__);
2044 ret = proc_control(ps, p);
2045 if (ret >= 0)
2046 inode->i_mtime = CURRENT_TIME;
2047 break;
2048
2049 case USBDEVFS_BULK:
2050 snoop(&dev->dev, "%s: BULK\n", __func__);
2051 ret = proc_bulk(ps, p);
2052 if (ret >= 0)
2053 inode->i_mtime = CURRENT_TIME;
2054 break;
2055
2056 case USBDEVFS_RESETEP:
2057 snoop(&dev->dev, "%s: RESETEP\n", __func__);
2058 ret = proc_resetep(ps, p);
2059 if (ret >= 0)
2060 inode->i_mtime = CURRENT_TIME;
2061 break;
2062
2063 case USBDEVFS_RESET:
2064 snoop(&dev->dev, "%s: RESET\n", __func__);
2065 ret = proc_resetdevice(ps);
2066 break;
2067
2068 case USBDEVFS_CLEAR_HALT:
2069 snoop(&dev->dev, "%s: CLEAR_HALT\n", __func__);
2070 ret = proc_clearhalt(ps, p);
2071 if (ret >= 0)
2072 inode->i_mtime = CURRENT_TIME;
2073 break;
2074
2075 case USBDEVFS_GETDRIVER:
2076 snoop(&dev->dev, "%s: GETDRIVER\n", __func__);
2077 ret = proc_getdriver(ps, p);
2078 break;
2079
2080 case USBDEVFS_CONNECTINFO:
2081 snoop(&dev->dev, "%s: CONNECTINFO\n", __func__);
2082 ret = proc_connectinfo(ps, p);
2083 break;
2084
2085 case USBDEVFS_SETINTERFACE:
2086 snoop(&dev->dev, "%s: SETINTERFACE\n", __func__);
2087 ret = proc_setintf(ps, p);
2088 break;
2089
2090 case USBDEVFS_SETCONFIGURATION:
2091 snoop(&dev->dev, "%s: SETCONFIGURATION\n", __func__);
2092 ret = proc_setconfig(ps, p);
2093 break;
2094
2095 case USBDEVFS_SUBMITURB:
2096 snoop(&dev->dev, "%s: SUBMITURB\n", __func__);
2097 ret = proc_submiturb(ps, p);
2098 if (ret >= 0)
2099 inode->i_mtime = CURRENT_TIME;
2100 break;
2101
2102 #ifdef CONFIG_COMPAT
2103 case USBDEVFS_CONTROL32:
2104 snoop(&dev->dev, "%s: CONTROL32\n", __func__);
2105 ret = proc_control_compat(ps, p);
2106 if (ret >= 0)
2107 inode->i_mtime = CURRENT_TIME;
2108 break;
2109
2110 case USBDEVFS_BULK32:
2111 snoop(&dev->dev, "%s: BULK32\n", __func__);
2112 ret = proc_bulk_compat(ps, p);
2113 if (ret >= 0)
2114 inode->i_mtime = CURRENT_TIME;
2115 break;
2116
2117 case USBDEVFS_DISCSIGNAL32:
2118 snoop(&dev->dev, "%s: DISCSIGNAL32\n", __func__);
2119 ret = proc_disconnectsignal_compat(ps, p);
2120 break;
2121
2122 case USBDEVFS_SUBMITURB32:
2123 snoop(&dev->dev, "%s: SUBMITURB32\n", __func__);
2124 ret = proc_submiturb_compat(ps, p);
2125 if (ret >= 0)
2126 inode->i_mtime = CURRENT_TIME;
2127 break;
2128
2129 case USBDEVFS_IOCTL32:
2130 snoop(&dev->dev, "%s: IOCTL32\n", __func__);
2131 ret = proc_ioctl_compat(ps, ptr_to_compat(p));
2132 break;
2133 #endif
2134
2135 case USBDEVFS_DISCARDURB:
2136 snoop(&dev->dev, "%s: DISCARDURB\n", __func__);
2137 ret = proc_unlinkurb(ps, p);
2138 break;
2139
2140 case USBDEVFS_DISCSIGNAL:
2141 snoop(&dev->dev, "%s: DISCSIGNAL\n", __func__);
2142 ret = proc_disconnectsignal(ps, p);
2143 break;
2144
2145 case USBDEVFS_CLAIMINTERFACE:
2146 snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __func__);
2147 ret = proc_claiminterface(ps, p);
2148 break;
2149
2150 case USBDEVFS_RELEASEINTERFACE:
2151 snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __func__);
2152 ret = proc_releaseinterface(ps, p);
2153 break;
2154
2155 case USBDEVFS_IOCTL:
2156 snoop(&dev->dev, "%s: IOCTL\n", __func__);
2157 ret = proc_ioctl_default(ps, p);
2158 break;
2159
2160 case USBDEVFS_CLAIM_PORT:
2161 snoop(&dev->dev, "%s: CLAIM_PORT\n", __func__);
2162 ret = proc_claim_port(ps, p);
2163 break;
2164
2165 case USBDEVFS_RELEASE_PORT:
2166 snoop(&dev->dev, "%s: RELEASE_PORT\n", __func__);
2167 ret = proc_release_port(ps, p);
2168 break;
2169 case USBDEVFS_GET_CAPABILITIES:
2170 ret = proc_get_capabilities(ps, p);
2171 break;
2172 case USBDEVFS_DISCONNECT_CLAIM:
2173 ret = proc_disconnect_claim(ps, p);
2174 break;
2175 }
2176
2177 done:
2178 usb_unlock_device(dev);
2179 if (ret >= 0)
2180 inode->i_atime = CURRENT_TIME;
2181 return ret;
2182 }
2183
2184 static long usbdev_ioctl(struct file *file, unsigned int cmd,
2185 unsigned long arg)
2186 {
2187 int ret;
2188
2189 ret = usbdev_do_ioctl(file, cmd, (void __user *)arg);
2190
2191 return ret;
2192 }
2193
2194 #ifdef CONFIG_COMPAT
2195 static long usbdev_compat_ioctl(struct file *file, unsigned int cmd,
2196 unsigned long arg)
2197 {
2198 int ret;
2199
2200 ret = usbdev_do_ioctl(file, cmd, compat_ptr(arg));
2201
2202 return ret;
2203 }
2204 #endif
2205
2206 /* No kernel lock - fine */
2207 static unsigned int usbdev_poll(struct file *file,
2208 struct poll_table_struct *wait)
2209 {
2210 struct dev_state *ps = file->private_data;
2211 unsigned int mask = 0;
2212
2213 poll_wait(file, &ps->wait, wait);
2214 if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed))
2215 mask |= POLLOUT | POLLWRNORM;
2216 if (!connected(ps))
2217 mask |= POLLERR | POLLHUP;
2218 return mask;
2219 }
2220
2221 const struct file_operations usbdev_file_operations = {
2222 .owner = THIS_MODULE,
2223 .llseek = usbdev_lseek,
2224 .read = usbdev_read,
2225 .poll = usbdev_poll,
2226 .unlocked_ioctl = usbdev_ioctl,
2227 #ifdef CONFIG_COMPAT
2228 .compat_ioctl = usbdev_compat_ioctl,
2229 #endif
2230 .open = usbdev_open,
2231 .release = usbdev_release,
2232 };
2233
2234 static void usbdev_remove(struct usb_device *udev)
2235 {
2236 struct dev_state *ps;
2237 struct siginfo sinfo;
2238
2239 while (!list_empty(&udev->filelist)) {
2240 ps = list_entry(udev->filelist.next, struct dev_state, list);
2241 destroy_all_async(ps);
2242 wake_up_all(&ps->wait);
2243 list_del_init(&ps->list);
2244 if (ps->discsignr) {
2245 memset(&sinfo, 0, sizeof(sinfo));
2246 sinfo.si_signo = ps->discsignr;
2247 sinfo.si_errno = EPIPE;
2248 sinfo.si_code = SI_ASYNCIO;
2249 sinfo.si_addr = ps->disccontext;
2250 kill_pid_info_as_cred(ps->discsignr, &sinfo,
2251 ps->disc_pid, ps->cred, ps->secid);
2252 }
2253 }
2254 }
2255
2256 static int usbdev_notify(struct notifier_block *self,
2257 unsigned long action, void *dev)
2258 {
2259 switch (action) {
2260 case USB_DEVICE_ADD:
2261 break;
2262 case USB_DEVICE_REMOVE:
2263 usbdev_remove(dev);
2264 break;
2265 }
2266 return NOTIFY_OK;
2267 }
2268
2269 static struct notifier_block usbdev_nb = {
2270 .notifier_call = usbdev_notify,
2271 };
2272
2273 static struct cdev usb_device_cdev;
2274
2275 int __init usb_devio_init(void)
2276 {
2277 int retval;
2278
2279 retval = register_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX,
2280 "usb_device");
2281 if (retval) {
2282 printk(KERN_ERR "Unable to register minors for usb_device\n");
2283 goto out;
2284 }
2285 cdev_init(&usb_device_cdev, &usbdev_file_operations);
2286 retval = cdev_add(&usb_device_cdev, USB_DEVICE_DEV, USB_DEVICE_MAX);
2287 if (retval) {
2288 printk(KERN_ERR "Unable to get usb_device major %d\n",
2289 USB_DEVICE_MAJOR);
2290 goto error_cdev;
2291 }
2292 usb_register_notify(&usbdev_nb);
2293 out:
2294 return retval;
2295
2296 error_cdev:
2297 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
2298 goto out;
2299 }
2300
2301 void usb_devio_cleanup(void)
2302 {
2303 usb_unregister_notify(&usbdev_nb);
2304 cdev_del(&usb_device_cdev);
2305 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
2306 }
Linux with added FPC-III support