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Merge branch 'fixes-3.10' of git://git.infradead.org/users/willy/linux-nvme
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / usb / core / devio.c
1 /*****************************************************************************/
2
3 /*
4 * devio.c -- User space communication with USB devices.
5 *
6 * Copyright (C) 1999-2000 Thomas Sailer (sailer@ife.ee.ethz.ch)
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 *
22 * 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 <asm/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 sinfo.si_signo = as->signr;
505 sinfo.si_errno = as->status;
506 sinfo.si_code = SI_ASYNCIO;
507 sinfo.si_addr = as->userurb;
508 pid = get_pid(as->pid);
509 cred = get_cred(as->cred);
510 secid = as->secid;
511 }
512 snoop(&urb->dev->dev, "urb complete\n");
513 snoop_urb(urb->dev, as->userurb, urb->pipe, urb->actual_length,
514 as->status, COMPLETE, NULL, 0);
515 if ((urb->transfer_flags & URB_DIR_MASK) == USB_DIR_IN)
516 snoop_urb_data(urb, urb->actual_length);
517
518 if (as->status < 0 && as->bulk_addr && as->status != -ECONNRESET &&
519 as->status != -ENOENT)
520 cancel_bulk_urbs(ps, as->bulk_addr);
521 spin_unlock(&ps->lock);
522
523 if (signr) {
524 kill_pid_info_as_cred(sinfo.si_signo, &sinfo, pid, cred, secid);
525 put_pid(pid);
526 put_cred(cred);
527 }
528
529 wake_up(&ps->wait);
530 }
531
532 static void destroy_async(struct dev_state *ps, struct list_head *list)
533 {
534 struct urb *urb;
535 struct async *as;
536 unsigned long flags;
537
538 spin_lock_irqsave(&ps->lock, flags);
539 while (!list_empty(list)) {
540 as = list_entry(list->next, struct async, asynclist);
541 list_del_init(&as->asynclist);
542 urb = as->urb;
543 usb_get_urb(urb);
544
545 /* drop the spinlock so the completion handler can run */
546 spin_unlock_irqrestore(&ps->lock, flags);
547 usb_kill_urb(urb);
548 usb_put_urb(urb);
549 spin_lock_irqsave(&ps->lock, flags);
550 }
551 spin_unlock_irqrestore(&ps->lock, flags);
552 }
553
554 static void destroy_async_on_interface(struct dev_state *ps,
555 unsigned int ifnum)
556 {
557 struct list_head *p, *q, hitlist;
558 unsigned long flags;
559
560 INIT_LIST_HEAD(&hitlist);
561 spin_lock_irqsave(&ps->lock, flags);
562 list_for_each_safe(p, q, &ps->async_pending)
563 if (ifnum == list_entry(p, struct async, asynclist)->ifnum)
564 list_move_tail(p, &hitlist);
565 spin_unlock_irqrestore(&ps->lock, flags);
566 destroy_async(ps, &hitlist);
567 }
568
569 static void destroy_all_async(struct dev_state *ps)
570 {
571 destroy_async(ps, &ps->async_pending);
572 }
573
574 /*
575 * interface claims are made only at the request of user level code,
576 * which can also release them (explicitly or by closing files).
577 * they're also undone when devices disconnect.
578 */
579
580 static int driver_probe(struct usb_interface *intf,
581 const struct usb_device_id *id)
582 {
583 return -ENODEV;
584 }
585
586 static void driver_disconnect(struct usb_interface *intf)
587 {
588 struct dev_state *ps = usb_get_intfdata(intf);
589 unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber;
590
591 if (!ps)
592 return;
593
594 /* NOTE: this relies on usbcore having canceled and completed
595 * all pending I/O requests; 2.6 does that.
596 */
597
598 if (likely(ifnum < 8*sizeof(ps->ifclaimed)))
599 clear_bit(ifnum, &ps->ifclaimed);
600 else
601 dev_warn(&intf->dev, "interface number %u out of range\n",
602 ifnum);
603
604 usb_set_intfdata(intf, NULL);
605
606 /* force async requests to complete */
607 destroy_async_on_interface(ps, ifnum);
608 }
609
610 /* The following routines are merely placeholders. There is no way
611 * to inform a user task about suspend or resumes.
612 */
613 static int driver_suspend(struct usb_interface *intf, pm_message_t msg)
614 {
615 return 0;
616 }
617
618 static int driver_resume(struct usb_interface *intf)
619 {
620 return 0;
621 }
622
623 struct usb_driver usbfs_driver = {
624 .name = "usbfs",
625 .probe = driver_probe,
626 .disconnect = driver_disconnect,
627 .suspend = driver_suspend,
628 .resume = driver_resume,
629 };
630
631 static int claimintf(struct dev_state *ps, unsigned int ifnum)
632 {
633 struct usb_device *dev = ps->dev;
634 struct usb_interface *intf;
635 int err;
636
637 if (ifnum >= 8*sizeof(ps->ifclaimed))
638 return -EINVAL;
639 /* already claimed */
640 if (test_bit(ifnum, &ps->ifclaimed))
641 return 0;
642
643 intf = usb_ifnum_to_if(dev, ifnum);
644 if (!intf)
645 err = -ENOENT;
646 else
647 err = usb_driver_claim_interface(&usbfs_driver, intf, ps);
648 if (err == 0)
649 set_bit(ifnum, &ps->ifclaimed);
650 return err;
651 }
652
653 static int releaseintf(struct dev_state *ps, unsigned int ifnum)
654 {
655 struct usb_device *dev;
656 struct usb_interface *intf;
657 int err;
658
659 err = -EINVAL;
660 if (ifnum >= 8*sizeof(ps->ifclaimed))
661 return err;
662 dev = ps->dev;
663 intf = usb_ifnum_to_if(dev, ifnum);
664 if (!intf)
665 err = -ENOENT;
666 else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) {
667 usb_driver_release_interface(&usbfs_driver, intf);
668 err = 0;
669 }
670 return err;
671 }
672
673 static int checkintf(struct dev_state *ps, unsigned int ifnum)
674 {
675 if (ps->dev->state != USB_STATE_CONFIGURED)
676 return -EHOSTUNREACH;
677 if (ifnum >= 8*sizeof(ps->ifclaimed))
678 return -EINVAL;
679 if (test_bit(ifnum, &ps->ifclaimed))
680 return 0;
681 /* if not yet claimed, claim it for the driver */
682 dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim "
683 "interface %u before use\n", task_pid_nr(current),
684 current->comm, ifnum);
685 return claimintf(ps, ifnum);
686 }
687
688 static int findintfep(struct usb_device *dev, unsigned int ep)
689 {
690 unsigned int i, j, e;
691 struct usb_interface *intf;
692 struct usb_host_interface *alts;
693 struct usb_endpoint_descriptor *endpt;
694
695 if (ep & ~(USB_DIR_IN|0xf))
696 return -EINVAL;
697 if (!dev->actconfig)
698 return -ESRCH;
699 for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) {
700 intf = dev->actconfig->interface[i];
701 for (j = 0; j < intf->num_altsetting; j++) {
702 alts = &intf->altsetting[j];
703 for (e = 0; e < alts->desc.bNumEndpoints; e++) {
704 endpt = &alts->endpoint[e].desc;
705 if (endpt->bEndpointAddress == ep)
706 return alts->desc.bInterfaceNumber;
707 }
708 }
709 }
710 return -ENOENT;
711 }
712
713 static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype,
714 unsigned int request, unsigned int index)
715 {
716 int ret = 0;
717 struct usb_host_interface *alt_setting;
718
719 if (ps->dev->state != USB_STATE_UNAUTHENTICATED
720 && ps->dev->state != USB_STATE_ADDRESS
721 && ps->dev->state != USB_STATE_CONFIGURED)
722 return -EHOSTUNREACH;
723 if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype))
724 return 0;
725
726 /*
727 * check for the special corner case 'get_device_id' in the printer
728 * class specification, where wIndex is (interface << 8 | altsetting)
729 * instead of just interface
730 */
731 if (requesttype == 0xa1 && request == 0) {
732 alt_setting = usb_find_alt_setting(ps->dev->actconfig,
733 index >> 8, index & 0xff);
734 if (alt_setting
735 && alt_setting->desc.bInterfaceClass == USB_CLASS_PRINTER)
736 index >>= 8;
737 }
738
739 index &= 0xff;
740 switch (requesttype & USB_RECIP_MASK) {
741 case USB_RECIP_ENDPOINT:
742 if ((index & ~USB_DIR_IN) == 0)
743 return 0;
744 ret = findintfep(ps->dev, index);
745 if (ret >= 0)
746 ret = checkintf(ps, ret);
747 break;
748
749 case USB_RECIP_INTERFACE:
750 ret = checkintf(ps, index);
751 break;
752 }
753 return ret;
754 }
755
756 static int match_devt(struct device *dev, void *data)
757 {
758 return dev->devt == (dev_t) (unsigned long) data;
759 }
760
761 static struct usb_device *usbdev_lookup_by_devt(dev_t devt)
762 {
763 struct device *dev;
764
765 dev = bus_find_device(&usb_bus_type, NULL,
766 (void *) (unsigned long) devt, match_devt);
767 if (!dev)
768 return NULL;
769 return container_of(dev, struct usb_device, dev);
770 }
771
772 /*
773 * file operations
774 */
775 static int usbdev_open(struct inode *inode, struct file *file)
776 {
777 struct usb_device *dev = NULL;
778 struct dev_state *ps;
779 int ret;
780
781 ret = -ENOMEM;
782 ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL);
783 if (!ps)
784 goto out_free_ps;
785
786 ret = -ENODEV;
787
788 /* Protect against simultaneous removal or release */
789 mutex_lock(&usbfs_mutex);
790
791 /* usbdev device-node */
792 if (imajor(inode) == USB_DEVICE_MAJOR)
793 dev = usbdev_lookup_by_devt(inode->i_rdev);
794
795 mutex_unlock(&usbfs_mutex);
796
797 if (!dev)
798 goto out_free_ps;
799
800 usb_lock_device(dev);
801 if (dev->state == USB_STATE_NOTATTACHED)
802 goto out_unlock_device;
803
804 ret = usb_autoresume_device(dev);
805 if (ret)
806 goto out_unlock_device;
807
808 ps->dev = dev;
809 ps->file = file;
810 spin_lock_init(&ps->lock);
811 INIT_LIST_HEAD(&ps->list);
812 INIT_LIST_HEAD(&ps->async_pending);
813 INIT_LIST_HEAD(&ps->async_completed);
814 init_waitqueue_head(&ps->wait);
815 ps->discsignr = 0;
816 ps->disc_pid = get_pid(task_pid(current));
817 ps->cred = get_current_cred();
818 ps->disccontext = NULL;
819 ps->ifclaimed = 0;
820 security_task_getsecid(current, &ps->secid);
821 smp_wmb();
822 list_add_tail(&ps->list, &dev->filelist);
823 file->private_data = ps;
824 usb_unlock_device(dev);
825 snoop(&dev->dev, "opened by process %d: %s\n", task_pid_nr(current),
826 current->comm);
827 return ret;
828
829 out_unlock_device:
830 usb_unlock_device(dev);
831 usb_put_dev(dev);
832 out_free_ps:
833 kfree(ps);
834 return ret;
835 }
836
837 static int usbdev_release(struct inode *inode, struct file *file)
838 {
839 struct dev_state *ps = file->private_data;
840 struct usb_device *dev = ps->dev;
841 unsigned int ifnum;
842 struct async *as;
843
844 usb_lock_device(dev);
845 usb_hub_release_all_ports(dev, ps);
846
847 list_del_init(&ps->list);
848
849 for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed);
850 ifnum++) {
851 if (test_bit(ifnum, &ps->ifclaimed))
852 releaseintf(ps, ifnum);
853 }
854 destroy_all_async(ps);
855 usb_autosuspend_device(dev);
856 usb_unlock_device(dev);
857 usb_put_dev(dev);
858 put_pid(ps->disc_pid);
859 put_cred(ps->cred);
860
861 as = async_getcompleted(ps);
862 while (as) {
863 free_async(as);
864 as = async_getcompleted(ps);
865 }
866 kfree(ps);
867 return 0;
868 }
869
870 static int proc_control(struct dev_state *ps, void __user *arg)
871 {
872 struct usb_device *dev = ps->dev;
873 struct usbdevfs_ctrltransfer ctrl;
874 unsigned int tmo;
875 unsigned char *tbuf;
876 unsigned wLength;
877 int i, pipe, ret;
878
879 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
880 return -EFAULT;
881 ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.bRequest,
882 ctrl.wIndex);
883 if (ret)
884 return ret;
885 wLength = ctrl.wLength; /* To suppress 64k PAGE_SIZE warning */
886 if (wLength > PAGE_SIZE)
887 return -EINVAL;
888 ret = usbfs_increase_memory_usage(PAGE_SIZE + sizeof(struct urb) +
889 sizeof(struct usb_ctrlrequest));
890 if (ret)
891 return ret;
892 tbuf = (unsigned char *)__get_free_page(GFP_KERNEL);
893 if (!tbuf) {
894 ret = -ENOMEM;
895 goto done;
896 }
897 tmo = ctrl.timeout;
898 snoop(&dev->dev, "control urb: bRequestType=%02x "
899 "bRequest=%02x wValue=%04x "
900 "wIndex=%04x wLength=%04x\n",
901 ctrl.bRequestType, ctrl.bRequest,
902 __le16_to_cpup(&ctrl.wValue),
903 __le16_to_cpup(&ctrl.wIndex),
904 __le16_to_cpup(&ctrl.wLength));
905 if (ctrl.bRequestType & 0x80) {
906 if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data,
907 ctrl.wLength)) {
908 ret = -EINVAL;
909 goto done;
910 }
911 pipe = usb_rcvctrlpipe(dev, 0);
912 snoop_urb(dev, NULL, pipe, ctrl.wLength, tmo, SUBMIT, NULL, 0);
913
914 usb_unlock_device(dev);
915 i = usb_control_msg(dev, pipe, ctrl.bRequest,
916 ctrl.bRequestType, ctrl.wValue, ctrl.wIndex,
917 tbuf, ctrl.wLength, tmo);
918 usb_lock_device(dev);
919 snoop_urb(dev, NULL, pipe, max(i, 0), min(i, 0), COMPLETE,
920 tbuf, max(i, 0));
921 if ((i > 0) && ctrl.wLength) {
922 if (copy_to_user(ctrl.data, tbuf, i)) {
923 ret = -EFAULT;
924 goto done;
925 }
926 }
927 } else {
928 if (ctrl.wLength) {
929 if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) {
930 ret = -EFAULT;
931 goto done;
932 }
933 }
934 pipe = usb_sndctrlpipe(dev, 0);
935 snoop_urb(dev, NULL, pipe, ctrl.wLength, tmo, SUBMIT,
936 tbuf, ctrl.wLength);
937
938 usb_unlock_device(dev);
939 i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest,
940 ctrl.bRequestType, ctrl.wValue, ctrl.wIndex,
941 tbuf, ctrl.wLength, tmo);
942 usb_lock_device(dev);
943 snoop_urb(dev, NULL, pipe, max(i, 0), min(i, 0), COMPLETE, NULL, 0);
944 }
945 if (i < 0 && i != -EPIPE) {
946 dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL "
947 "failed cmd %s rqt %u rq %u len %u ret %d\n",
948 current->comm, ctrl.bRequestType, ctrl.bRequest,
949 ctrl.wLength, i);
950 }
951 ret = i;
952 done:
953 free_page((unsigned long) tbuf);
954 usbfs_decrease_memory_usage(PAGE_SIZE + sizeof(struct urb) +
955 sizeof(struct usb_ctrlrequest));
956 return ret;
957 }
958
959 static int proc_bulk(struct dev_state *ps, void __user *arg)
960 {
961 struct usb_device *dev = ps->dev;
962 struct usbdevfs_bulktransfer bulk;
963 unsigned int tmo, len1, pipe;
964 int len2;
965 unsigned char *tbuf;
966 int i, ret;
967
968 if (copy_from_user(&bulk, arg, sizeof(bulk)))
969 return -EFAULT;
970 ret = findintfep(ps->dev, bulk.ep);
971 if (ret < 0)
972 return ret;
973 ret = checkintf(ps, ret);
974 if (ret)
975 return ret;
976 if (bulk.ep & USB_DIR_IN)
977 pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f);
978 else
979 pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f);
980 if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN)))
981 return -EINVAL;
982 len1 = bulk.len;
983 if (len1 >= USBFS_XFER_MAX)
984 return -EINVAL;
985 ret = usbfs_increase_memory_usage(len1 + sizeof(struct urb));
986 if (ret)
987 return ret;
988 if (!(tbuf = kmalloc(len1, GFP_KERNEL))) {
989 ret = -ENOMEM;
990 goto done;
991 }
992 tmo = bulk.timeout;
993 if (bulk.ep & 0x80) {
994 if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) {
995 ret = -EINVAL;
996 goto done;
997 }
998 snoop_urb(dev, NULL, pipe, len1, tmo, SUBMIT, NULL, 0);
999
1000 usb_unlock_device(dev);
1001 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
1002 usb_lock_device(dev);
1003 snoop_urb(dev, NULL, pipe, len2, i, COMPLETE, tbuf, len2);
1004
1005 if (!i && len2) {
1006 if (copy_to_user(bulk.data, tbuf, len2)) {
1007 ret = -EFAULT;
1008 goto done;
1009 }
1010 }
1011 } else {
1012 if (len1) {
1013 if (copy_from_user(tbuf, bulk.data, len1)) {
1014 ret = -EFAULT;
1015 goto done;
1016 }
1017 }
1018 snoop_urb(dev, NULL, pipe, len1, tmo, SUBMIT, tbuf, len1);
1019
1020 usb_unlock_device(dev);
1021 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
1022 usb_lock_device(dev);
1023 snoop_urb(dev, NULL, pipe, len2, i, COMPLETE, NULL, 0);
1024 }
1025 ret = (i < 0 ? i : len2);
1026 done:
1027 kfree(tbuf);
1028 usbfs_decrease_memory_usage(len1 + sizeof(struct urb));
1029 return ret;
1030 }
1031
1032 static int proc_resetep(struct dev_state *ps, void __user *arg)
1033 {
1034 unsigned int ep;
1035 int ret;
1036
1037 if (get_user(ep, (unsigned int __user *)arg))
1038 return -EFAULT;
1039 ret = findintfep(ps->dev, ep);
1040 if (ret < 0)
1041 return ret;
1042 ret = checkintf(ps, ret);
1043 if (ret)
1044 return ret;
1045 usb_reset_endpoint(ps->dev, ep);
1046 return 0;
1047 }
1048
1049 static int proc_clearhalt(struct dev_state *ps, void __user *arg)
1050 {
1051 unsigned int ep;
1052 int pipe;
1053 int ret;
1054
1055 if (get_user(ep, (unsigned int __user *)arg))
1056 return -EFAULT;
1057 ret = findintfep(ps->dev, ep);
1058 if (ret < 0)
1059 return ret;
1060 ret = checkintf(ps, ret);
1061 if (ret)
1062 return ret;
1063 if (ep & USB_DIR_IN)
1064 pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f);
1065 else
1066 pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f);
1067
1068 return usb_clear_halt(ps->dev, pipe);
1069 }
1070
1071 static int proc_getdriver(struct dev_state *ps, void __user *arg)
1072 {
1073 struct usbdevfs_getdriver gd;
1074 struct usb_interface *intf;
1075 int ret;
1076
1077 if (copy_from_user(&gd, arg, sizeof(gd)))
1078 return -EFAULT;
1079 intf = usb_ifnum_to_if(ps->dev, gd.interface);
1080 if (!intf || !intf->dev.driver)
1081 ret = -ENODATA;
1082 else {
1083 strlcpy(gd.driver, intf->dev.driver->name,
1084 sizeof(gd.driver));
1085 ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0);
1086 }
1087 return ret;
1088 }
1089
1090 static int proc_connectinfo(struct dev_state *ps, void __user *arg)
1091 {
1092 struct usbdevfs_connectinfo ci = {
1093 .devnum = ps->dev->devnum,
1094 .slow = ps->dev->speed == USB_SPEED_LOW
1095 };
1096
1097 if (copy_to_user(arg, &ci, sizeof(ci)))
1098 return -EFAULT;
1099 return 0;
1100 }
1101
1102 static int proc_resetdevice(struct dev_state *ps)
1103 {
1104 return usb_reset_device(ps->dev);
1105 }
1106
1107 static int proc_setintf(struct dev_state *ps, void __user *arg)
1108 {
1109 struct usbdevfs_setinterface setintf;
1110 int ret;
1111
1112 if (copy_from_user(&setintf, arg, sizeof(setintf)))
1113 return -EFAULT;
1114 if ((ret = checkintf(ps, setintf.interface)))
1115 return ret;
1116 return usb_set_interface(ps->dev, setintf.interface,
1117 setintf.altsetting);
1118 }
1119
1120 static int proc_setconfig(struct dev_state *ps, void __user *arg)
1121 {
1122 int u;
1123 int status = 0;
1124 struct usb_host_config *actconfig;
1125
1126 if (get_user(u, (int __user *)arg))
1127 return -EFAULT;
1128
1129 actconfig = ps->dev->actconfig;
1130
1131 /* Don't touch the device if any interfaces are claimed.
1132 * It could interfere with other drivers' operations, and if
1133 * an interface is claimed by usbfs it could easily deadlock.
1134 */
1135 if (actconfig) {
1136 int i;
1137
1138 for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) {
1139 if (usb_interface_claimed(actconfig->interface[i])) {
1140 dev_warn(&ps->dev->dev,
1141 "usbfs: interface %d claimed by %s "
1142 "while '%s' sets config #%d\n",
1143 actconfig->interface[i]
1144 ->cur_altsetting
1145 ->desc.bInterfaceNumber,
1146 actconfig->interface[i]
1147 ->dev.driver->name,
1148 current->comm, u);
1149 status = -EBUSY;
1150 break;
1151 }
1152 }
1153 }
1154
1155 /* SET_CONFIGURATION is often abused as a "cheap" driver reset,
1156 * so avoid usb_set_configuration()'s kick to sysfs
1157 */
1158 if (status == 0) {
1159 if (actconfig && actconfig->desc.bConfigurationValue == u)
1160 status = usb_reset_configuration(ps->dev);
1161 else
1162 status = usb_set_configuration(ps->dev, u);
1163 }
1164
1165 return status;
1166 }
1167
1168 static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
1169 struct usbdevfs_iso_packet_desc __user *iso_frame_desc,
1170 void __user *arg)
1171 {
1172 struct usbdevfs_iso_packet_desc *isopkt = NULL;
1173 struct usb_host_endpoint *ep;
1174 struct async *as = NULL;
1175 struct usb_ctrlrequest *dr = NULL;
1176 unsigned int u, totlen, isofrmlen;
1177 int i, ret, is_in, num_sgs = 0, ifnum = -1;
1178 void *buf;
1179
1180 if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP |
1181 USBDEVFS_URB_SHORT_NOT_OK |
1182 USBDEVFS_URB_BULK_CONTINUATION |
1183 USBDEVFS_URB_NO_FSBR |
1184 USBDEVFS_URB_ZERO_PACKET |
1185 USBDEVFS_URB_NO_INTERRUPT))
1186 return -EINVAL;
1187 if (uurb->buffer_length > 0 && !uurb->buffer)
1188 return -EINVAL;
1189 if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL &&
1190 (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) {
1191 ifnum = findintfep(ps->dev, uurb->endpoint);
1192 if (ifnum < 0)
1193 return ifnum;
1194 ret = checkintf(ps, ifnum);
1195 if (ret)
1196 return ret;
1197 }
1198 if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0) {
1199 is_in = 1;
1200 ep = ps->dev->ep_in[uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
1201 } else {
1202 is_in = 0;
1203 ep = ps->dev->ep_out[uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
1204 }
1205 if (!ep)
1206 return -ENOENT;
1207
1208 u = 0;
1209 switch(uurb->type) {
1210 case USBDEVFS_URB_TYPE_CONTROL:
1211 if (!usb_endpoint_xfer_control(&ep->desc))
1212 return -EINVAL;
1213 /* min 8 byte setup packet */
1214 if (uurb->buffer_length < 8)
1215 return -EINVAL;
1216 dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL);
1217 if (!dr)
1218 return -ENOMEM;
1219 if (copy_from_user(dr, uurb->buffer, 8)) {
1220 ret = -EFAULT;
1221 goto error;
1222 }
1223 if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) {
1224 ret = -EINVAL;
1225 goto error;
1226 }
1227 ret = check_ctrlrecip(ps, dr->bRequestType, dr->bRequest,
1228 le16_to_cpup(&dr->wIndex));
1229 if (ret)
1230 goto error;
1231 uurb->number_of_packets = 0;
1232 uurb->buffer_length = le16_to_cpup(&dr->wLength);
1233 uurb->buffer += 8;
1234 if ((dr->bRequestType & USB_DIR_IN) && uurb->buffer_length) {
1235 is_in = 1;
1236 uurb->endpoint |= USB_DIR_IN;
1237 } else {
1238 is_in = 0;
1239 uurb->endpoint &= ~USB_DIR_IN;
1240 }
1241 snoop(&ps->dev->dev, "control urb: bRequestType=%02x "
1242 "bRequest=%02x wValue=%04x "
1243 "wIndex=%04x wLength=%04x\n",
1244 dr->bRequestType, dr->bRequest,
1245 __le16_to_cpup(&dr->wValue),
1246 __le16_to_cpup(&dr->wIndex),
1247 __le16_to_cpup(&dr->wLength));
1248 u = sizeof(struct usb_ctrlrequest);
1249 break;
1250
1251 case USBDEVFS_URB_TYPE_BULK:
1252 switch (usb_endpoint_type(&ep->desc)) {
1253 case USB_ENDPOINT_XFER_CONTROL:
1254 case USB_ENDPOINT_XFER_ISOC:
1255 return -EINVAL;
1256 case USB_ENDPOINT_XFER_INT:
1257 /* allow single-shot interrupt transfers */
1258 uurb->type = USBDEVFS_URB_TYPE_INTERRUPT;
1259 goto interrupt_urb;
1260 }
1261 uurb->number_of_packets = 0;
1262 num_sgs = DIV_ROUND_UP(uurb->buffer_length, USB_SG_SIZE);
1263 if (num_sgs == 1 || num_sgs > ps->dev->bus->sg_tablesize)
1264 num_sgs = 0;
1265 break;
1266
1267 case USBDEVFS_URB_TYPE_INTERRUPT:
1268 if (!usb_endpoint_xfer_int(&ep->desc))
1269 return -EINVAL;
1270 interrupt_urb:
1271 uurb->number_of_packets = 0;
1272 break;
1273
1274 case USBDEVFS_URB_TYPE_ISO:
1275 /* arbitrary limit */
1276 if (uurb->number_of_packets < 1 ||
1277 uurb->number_of_packets > 128)
1278 return -EINVAL;
1279 if (!usb_endpoint_xfer_isoc(&ep->desc))
1280 return -EINVAL;
1281 isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) *
1282 uurb->number_of_packets;
1283 if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL)))
1284 return -ENOMEM;
1285 if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) {
1286 ret = -EFAULT;
1287 goto error;
1288 }
1289 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
1290 /*
1291 * arbitrary limit need for USB 3.0
1292 * bMaxBurst (0~15 allowed, 1~16 packets)
1293 * bmAttributes (bit 1:0, mult 0~2, 1~3 packets)
1294 * sizemax: 1024 * 16 * 3 = 49152
1295 */
1296 if (isopkt[u].length > 49152) {
1297 ret = -EINVAL;
1298 goto error;
1299 }
1300 totlen += isopkt[u].length;
1301 }
1302 u *= sizeof(struct usb_iso_packet_descriptor);
1303 uurb->buffer_length = totlen;
1304 break;
1305
1306 default:
1307 return -EINVAL;
1308 }
1309
1310 if (uurb->buffer_length >= USBFS_XFER_MAX) {
1311 ret = -EINVAL;
1312 goto error;
1313 }
1314 if (uurb->buffer_length > 0 &&
1315 !access_ok(is_in ? VERIFY_WRITE : VERIFY_READ,
1316 uurb->buffer, uurb->buffer_length)) {
1317 ret = -EFAULT;
1318 goto error;
1319 }
1320 as = alloc_async(uurb->number_of_packets);
1321 if (!as) {
1322 ret = -ENOMEM;
1323 goto error;
1324 }
1325
1326 u += sizeof(struct async) + sizeof(struct urb) + uurb->buffer_length +
1327 num_sgs * sizeof(struct scatterlist);
1328 ret = usbfs_increase_memory_usage(u);
1329 if (ret)
1330 goto error;
1331 as->mem_usage = u;
1332
1333 if (num_sgs) {
1334 as->urb->sg = kmalloc(num_sgs * sizeof(struct scatterlist),
1335 GFP_KERNEL);
1336 if (!as->urb->sg) {
1337 ret = -ENOMEM;
1338 goto error;
1339 }
1340 as->urb->num_sgs = num_sgs;
1341 sg_init_table(as->urb->sg, as->urb->num_sgs);
1342
1343 totlen = uurb->buffer_length;
1344 for (i = 0; i < as->urb->num_sgs; i++) {
1345 u = (totlen > USB_SG_SIZE) ? USB_SG_SIZE : totlen;
1346 buf = kmalloc(u, GFP_KERNEL);
1347 if (!buf) {
1348 ret = -ENOMEM;
1349 goto error;
1350 }
1351 sg_set_buf(&as->urb->sg[i], buf, u);
1352
1353 if (!is_in) {
1354 if (copy_from_user(buf, uurb->buffer, u)) {
1355 ret = -EFAULT;
1356 goto error;
1357 }
1358 uurb->buffer += u;
1359 }
1360 totlen -= u;
1361 }
1362 } else if (uurb->buffer_length > 0) {
1363 as->urb->transfer_buffer = kmalloc(uurb->buffer_length,
1364 GFP_KERNEL);
1365 if (!as->urb->transfer_buffer) {
1366 ret = -ENOMEM;
1367 goto error;
1368 }
1369
1370 if (!is_in) {
1371 if (copy_from_user(as->urb->transfer_buffer,
1372 uurb->buffer,
1373 uurb->buffer_length)) {
1374 ret = -EFAULT;
1375 goto error;
1376 }
1377 } else if (uurb->type == USBDEVFS_URB_TYPE_ISO) {
1378 /*
1379 * Isochronous input data may end up being
1380 * discontiguous if some of the packets are short.
1381 * Clear the buffer so that the gaps don't leak
1382 * kernel data to userspace.
1383 */
1384 memset(as->urb->transfer_buffer, 0,
1385 uurb->buffer_length);
1386 }
1387 }
1388 as->urb->dev = ps->dev;
1389 as->urb->pipe = (uurb->type << 30) |
1390 __create_pipe(ps->dev, uurb->endpoint & 0xf) |
1391 (uurb->endpoint & USB_DIR_IN);
1392
1393 /* This tedious sequence is necessary because the URB_* flags
1394 * are internal to the kernel and subject to change, whereas
1395 * the USBDEVFS_URB_* flags are a user API and must not be changed.
1396 */
1397 u = (is_in ? URB_DIR_IN : URB_DIR_OUT);
1398 if (uurb->flags & USBDEVFS_URB_ISO_ASAP)
1399 u |= URB_ISO_ASAP;
1400 if (uurb->flags & USBDEVFS_URB_SHORT_NOT_OK)
1401 u |= URB_SHORT_NOT_OK;
1402 if (uurb->flags & USBDEVFS_URB_NO_FSBR)
1403 u |= URB_NO_FSBR;
1404 if (uurb->flags & USBDEVFS_URB_ZERO_PACKET)
1405 u |= URB_ZERO_PACKET;
1406 if (uurb->flags & USBDEVFS_URB_NO_INTERRUPT)
1407 u |= URB_NO_INTERRUPT;
1408 as->urb->transfer_flags = u;
1409
1410 as->urb->transfer_buffer_length = uurb->buffer_length;
1411 as->urb->setup_packet = (unsigned char *)dr;
1412 dr = NULL;
1413 as->urb->start_frame = uurb->start_frame;
1414 as->urb->number_of_packets = uurb->number_of_packets;
1415 if (uurb->type == USBDEVFS_URB_TYPE_ISO ||
1416 ps->dev->speed == USB_SPEED_HIGH)
1417 as->urb->interval = 1 << min(15, ep->desc.bInterval - 1);
1418 else
1419 as->urb->interval = ep->desc.bInterval;
1420 as->urb->context = as;
1421 as->urb->complete = async_completed;
1422 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
1423 as->urb->iso_frame_desc[u].offset = totlen;
1424 as->urb->iso_frame_desc[u].length = isopkt[u].length;
1425 totlen += isopkt[u].length;
1426 }
1427 kfree(isopkt);
1428 isopkt = NULL;
1429 as->ps = ps;
1430 as->userurb = arg;
1431 if (is_in && uurb->buffer_length > 0)
1432 as->userbuffer = uurb->buffer;
1433 else
1434 as->userbuffer = NULL;
1435 as->signr = uurb->signr;
1436 as->ifnum = ifnum;
1437 as->pid = get_pid(task_pid(current));
1438 as->cred = get_current_cred();
1439 security_task_getsecid(current, &as->secid);
1440 snoop_urb(ps->dev, as->userurb, as->urb->pipe,
1441 as->urb->transfer_buffer_length, 0, SUBMIT,
1442 NULL, 0);
1443 if (!is_in)
1444 snoop_urb_data(as->urb, as->urb->transfer_buffer_length);
1445
1446 async_newpending(as);
1447
1448 if (usb_endpoint_xfer_bulk(&ep->desc)) {
1449 spin_lock_irq(&ps->lock);
1450
1451 /* Not exactly the endpoint address; the direction bit is
1452 * shifted to the 0x10 position so that the value will be
1453 * between 0 and 31.
1454 */
1455 as->bulk_addr = usb_endpoint_num(&ep->desc) |
1456 ((ep->desc.bEndpointAddress & USB_ENDPOINT_DIR_MASK)
1457 >> 3);
1458
1459 /* If this bulk URB is the start of a new transfer, re-enable
1460 * the endpoint. Otherwise mark it as a continuation URB.
1461 */
1462 if (uurb->flags & USBDEVFS_URB_BULK_CONTINUATION)
1463 as->bulk_status = AS_CONTINUATION;
1464 else
1465 ps->disabled_bulk_eps &= ~(1 << as->bulk_addr);
1466
1467 /* Don't accept continuation URBs if the endpoint is
1468 * disabled because of an earlier error.
1469 */
1470 if (ps->disabled_bulk_eps & (1 << as->bulk_addr))
1471 ret = -EREMOTEIO;
1472 else
1473 ret = usb_submit_urb(as->urb, GFP_ATOMIC);
1474 spin_unlock_irq(&ps->lock);
1475 } else {
1476 ret = usb_submit_urb(as->urb, GFP_KERNEL);
1477 }
1478
1479 if (ret) {
1480 dev_printk(KERN_DEBUG, &ps->dev->dev,
1481 "usbfs: usb_submit_urb returned %d\n", ret);
1482 snoop_urb(ps->dev, as->userurb, as->urb->pipe,
1483 0, ret, COMPLETE, NULL, 0);
1484 async_removepending(as);
1485 goto error;
1486 }
1487 return 0;
1488
1489 error:
1490 kfree(isopkt);
1491 kfree(dr);
1492 if (as)
1493 free_async(as);
1494 return ret;
1495 }
1496
1497 static int proc_submiturb(struct dev_state *ps, void __user *arg)
1498 {
1499 struct usbdevfs_urb uurb;
1500
1501 if (copy_from_user(&uurb, arg, sizeof(uurb)))
1502 return -EFAULT;
1503
1504 return proc_do_submiturb(ps, &uurb,
1505 (((struct usbdevfs_urb __user *)arg)->iso_frame_desc),
1506 arg);
1507 }
1508
1509 static int proc_unlinkurb(struct dev_state *ps, void __user *arg)
1510 {
1511 struct urb *urb;
1512 struct async *as;
1513 unsigned long flags;
1514
1515 spin_lock_irqsave(&ps->lock, flags);
1516 as = async_getpending(ps, arg);
1517 if (!as) {
1518 spin_unlock_irqrestore(&ps->lock, flags);
1519 return -EINVAL;
1520 }
1521
1522 urb = as->urb;
1523 usb_get_urb(urb);
1524 spin_unlock_irqrestore(&ps->lock, flags);
1525
1526 usb_kill_urb(urb);
1527 usb_put_urb(urb);
1528
1529 return 0;
1530 }
1531
1532 static int processcompl(struct async *as, void __user * __user *arg)
1533 {
1534 struct urb *urb = as->urb;
1535 struct usbdevfs_urb __user *userurb = as->userurb;
1536 void __user *addr = as->userurb;
1537 unsigned int i;
1538
1539 if (as->userbuffer && urb->actual_length) {
1540 if (copy_urb_data_to_user(as->userbuffer, urb))
1541 goto err_out;
1542 }
1543 if (put_user(as->status, &userurb->status))
1544 goto err_out;
1545 if (put_user(urb->actual_length, &userurb->actual_length))
1546 goto err_out;
1547 if (put_user(urb->error_count, &userurb->error_count))
1548 goto err_out;
1549
1550 if (usb_endpoint_xfer_isoc(&urb->ep->desc)) {
1551 for (i = 0; i < urb->number_of_packets; i++) {
1552 if (put_user(urb->iso_frame_desc[i].actual_length,
1553 &userurb->iso_frame_desc[i].actual_length))
1554 goto err_out;
1555 if (put_user(urb->iso_frame_desc[i].status,
1556 &userurb->iso_frame_desc[i].status))
1557 goto err_out;
1558 }
1559 }
1560
1561 if (put_user(addr, (void __user * __user *)arg))
1562 return -EFAULT;
1563 return 0;
1564
1565 err_out:
1566 return -EFAULT;
1567 }
1568
1569 static struct async *reap_as(struct dev_state *ps)
1570 {
1571 DECLARE_WAITQUEUE(wait, current);
1572 struct async *as = NULL;
1573 struct usb_device *dev = ps->dev;
1574
1575 add_wait_queue(&ps->wait, &wait);
1576 for (;;) {
1577 __set_current_state(TASK_INTERRUPTIBLE);
1578 as = async_getcompleted(ps);
1579 if (as)
1580 break;
1581 if (signal_pending(current))
1582 break;
1583 usb_unlock_device(dev);
1584 schedule();
1585 usb_lock_device(dev);
1586 }
1587 remove_wait_queue(&ps->wait, &wait);
1588 set_current_state(TASK_RUNNING);
1589 return as;
1590 }
1591
1592 static int proc_reapurb(struct dev_state *ps, void __user *arg)
1593 {
1594 struct async *as = reap_as(ps);
1595 if (as) {
1596 int retval = processcompl(as, (void __user * __user *)arg);
1597 free_async(as);
1598 return retval;
1599 }
1600 if (signal_pending(current))
1601 return -EINTR;
1602 return -EIO;
1603 }
1604
1605 static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg)
1606 {
1607 int retval;
1608 struct async *as;
1609
1610 as = async_getcompleted(ps);
1611 retval = -EAGAIN;
1612 if (as) {
1613 retval = processcompl(as, (void __user * __user *)arg);
1614 free_async(as);
1615 }
1616 return retval;
1617 }
1618
1619 #ifdef CONFIG_COMPAT
1620 static int proc_control_compat(struct dev_state *ps,
1621 struct usbdevfs_ctrltransfer32 __user *p32)
1622 {
1623 struct usbdevfs_ctrltransfer __user *p;
1624 __u32 udata;
1625 p = compat_alloc_user_space(sizeof(*p));
1626 if (copy_in_user(p, p32, (sizeof(*p32) - sizeof(compat_caddr_t))) ||
1627 get_user(udata, &p32->data) ||
1628 put_user(compat_ptr(udata), &p->data))
1629 return -EFAULT;
1630 return proc_control(ps, p);
1631 }
1632
1633 static int proc_bulk_compat(struct dev_state *ps,
1634 struct usbdevfs_bulktransfer32 __user *p32)
1635 {
1636 struct usbdevfs_bulktransfer __user *p;
1637 compat_uint_t n;
1638 compat_caddr_t addr;
1639
1640 p = compat_alloc_user_space(sizeof(*p));
1641
1642 if (get_user(n, &p32->ep) || put_user(n, &p->ep) ||
1643 get_user(n, &p32->len) || put_user(n, &p->len) ||
1644 get_user(n, &p32->timeout) || put_user(n, &p->timeout) ||
1645 get_user(addr, &p32->data) || put_user(compat_ptr(addr), &p->data))
1646 return -EFAULT;
1647
1648 return proc_bulk(ps, p);
1649 }
1650 static int proc_disconnectsignal_compat(struct dev_state *ps, void __user *arg)
1651 {
1652 struct usbdevfs_disconnectsignal32 ds;
1653
1654 if (copy_from_user(&ds, arg, sizeof(ds)))
1655 return -EFAULT;
1656 ps->discsignr = ds.signr;
1657 ps->disccontext = compat_ptr(ds.context);
1658 return 0;
1659 }
1660
1661 static int get_urb32(struct usbdevfs_urb *kurb,
1662 struct usbdevfs_urb32 __user *uurb)
1663 {
1664 __u32 uptr;
1665 if (!access_ok(VERIFY_READ, uurb, sizeof(*uurb)) ||
1666 __get_user(kurb->type, &uurb->type) ||
1667 __get_user(kurb->endpoint, &uurb->endpoint) ||
1668 __get_user(kurb->status, &uurb->status) ||
1669 __get_user(kurb->flags, &uurb->flags) ||
1670 __get_user(kurb->buffer_length, &uurb->buffer_length) ||
1671 __get_user(kurb->actual_length, &uurb->actual_length) ||
1672 __get_user(kurb->start_frame, &uurb->start_frame) ||
1673 __get_user(kurb->number_of_packets, &uurb->number_of_packets) ||
1674 __get_user(kurb->error_count, &uurb->error_count) ||
1675 __get_user(kurb->signr, &uurb->signr))
1676 return -EFAULT;
1677
1678 if (__get_user(uptr, &uurb->buffer))
1679 return -EFAULT;
1680 kurb->buffer = compat_ptr(uptr);
1681 if (__get_user(uptr, &uurb->usercontext))
1682 return -EFAULT;
1683 kurb->usercontext = compat_ptr(uptr);
1684
1685 return 0;
1686 }
1687
1688 static int proc_submiturb_compat(struct dev_state *ps, void __user *arg)
1689 {
1690 struct usbdevfs_urb uurb;
1691
1692 if (get_urb32(&uurb, (struct usbdevfs_urb32 __user *)arg))
1693 return -EFAULT;
1694
1695 return proc_do_submiturb(ps, &uurb,
1696 ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc,
1697 arg);
1698 }
1699
1700 static int processcompl_compat(struct async *as, void __user * __user *arg)
1701 {
1702 struct urb *urb = as->urb;
1703 struct usbdevfs_urb32 __user *userurb = as->userurb;
1704 void __user *addr = as->userurb;
1705 unsigned int i;
1706
1707 if (as->userbuffer && urb->actual_length) {
1708 if (copy_urb_data_to_user(as->userbuffer, urb))
1709 return -EFAULT;
1710 }
1711 if (put_user(as->status, &userurb->status))
1712 return -EFAULT;
1713 if (put_user(urb->actual_length, &userurb->actual_length))
1714 return -EFAULT;
1715 if (put_user(urb->error_count, &userurb->error_count))
1716 return -EFAULT;
1717
1718 if (usb_endpoint_xfer_isoc(&urb->ep->desc)) {
1719 for (i = 0; i < urb->number_of_packets; i++) {
1720 if (put_user(urb->iso_frame_desc[i].actual_length,
1721 &userurb->iso_frame_desc[i].actual_length))
1722 return -EFAULT;
1723 if (put_user(urb->iso_frame_desc[i].status,
1724 &userurb->iso_frame_desc[i].status))
1725 return -EFAULT;
1726 }
1727 }
1728
1729 if (put_user(ptr_to_compat(addr), (u32 __user *)arg))
1730 return -EFAULT;
1731 return 0;
1732 }
1733
1734 static int proc_reapurb_compat(struct dev_state *ps, void __user *arg)
1735 {
1736 struct async *as = reap_as(ps);
1737 if (as) {
1738 int retval = processcompl_compat(as, (void __user * __user *)arg);
1739 free_async(as);
1740 return retval;
1741 }
1742 if (signal_pending(current))
1743 return -EINTR;
1744 return -EIO;
1745 }
1746
1747 static int proc_reapurbnonblock_compat(struct dev_state *ps, void __user *arg)
1748 {
1749 int retval;
1750 struct async *as;
1751
1752 retval = -EAGAIN;
1753 as = async_getcompleted(ps);
1754 if (as) {
1755 retval = processcompl_compat(as, (void __user * __user *)arg);
1756 free_async(as);
1757 }
1758 return retval;
1759 }
1760
1761
1762 #endif
1763
1764 static int proc_disconnectsignal(struct dev_state *ps, void __user *arg)
1765 {
1766 struct usbdevfs_disconnectsignal ds;
1767
1768 if (copy_from_user(&ds, arg, sizeof(ds)))
1769 return -EFAULT;
1770 ps->discsignr = ds.signr;
1771 ps->disccontext = ds.context;
1772 return 0;
1773 }
1774
1775 static int proc_claiminterface(struct dev_state *ps, void __user *arg)
1776 {
1777 unsigned int ifnum;
1778
1779 if (get_user(ifnum, (unsigned int __user *)arg))
1780 return -EFAULT;
1781 return claimintf(ps, ifnum);
1782 }
1783
1784 static int proc_releaseinterface(struct dev_state *ps, void __user *arg)
1785 {
1786 unsigned int ifnum;
1787 int ret;
1788
1789 if (get_user(ifnum, (unsigned int __user *)arg))
1790 return -EFAULT;
1791 if ((ret = releaseintf(ps, ifnum)) < 0)
1792 return ret;
1793 destroy_async_on_interface (ps, ifnum);
1794 return 0;
1795 }
1796
1797 static int proc_ioctl(struct dev_state *ps, struct usbdevfs_ioctl *ctl)
1798 {
1799 int size;
1800 void *buf = NULL;
1801 int retval = 0;
1802 struct usb_interface *intf = NULL;
1803 struct usb_driver *driver = NULL;
1804
1805 /* alloc buffer */
1806 if ((size = _IOC_SIZE(ctl->ioctl_code)) > 0) {
1807 if ((buf = kmalloc(size, GFP_KERNEL)) == NULL)
1808 return -ENOMEM;
1809 if ((_IOC_DIR(ctl->ioctl_code) & _IOC_WRITE)) {
1810 if (copy_from_user(buf, ctl->data, size)) {
1811 kfree(buf);
1812 return -EFAULT;
1813 }
1814 } else {
1815 memset(buf, 0, size);
1816 }
1817 }
1818
1819 if (!connected(ps)) {
1820 kfree(buf);
1821 return -ENODEV;
1822 }
1823
1824 if (ps->dev->state != USB_STATE_CONFIGURED)
1825 retval = -EHOSTUNREACH;
1826 else if (!(intf = usb_ifnum_to_if(ps->dev, ctl->ifno)))
1827 retval = -EINVAL;
1828 else switch (ctl->ioctl_code) {
1829
1830 /* disconnect kernel driver from interface */
1831 case USBDEVFS_DISCONNECT:
1832 if (intf->dev.driver) {
1833 driver = to_usb_driver(intf->dev.driver);
1834 dev_dbg(&intf->dev, "disconnect by usbfs\n");
1835 usb_driver_release_interface(driver, intf);
1836 } else
1837 retval = -ENODATA;
1838 break;
1839
1840 /* let kernel drivers try to (re)bind to the interface */
1841 case USBDEVFS_CONNECT:
1842 if (!intf->dev.driver)
1843 retval = device_attach(&intf->dev);
1844 else
1845 retval = -EBUSY;
1846 break;
1847
1848 /* talk directly to the interface's driver */
1849 default:
1850 if (intf->dev.driver)
1851 driver = to_usb_driver(intf->dev.driver);
1852 if (driver == NULL || driver->unlocked_ioctl == NULL) {
1853 retval = -ENOTTY;
1854 } else {
1855 retval = driver->unlocked_ioctl(intf, ctl->ioctl_code, buf);
1856 if (retval == -ENOIOCTLCMD)
1857 retval = -ENOTTY;
1858 }
1859 }
1860
1861 /* cleanup and return */
1862 if (retval >= 0
1863 && (_IOC_DIR(ctl->ioctl_code) & _IOC_READ) != 0
1864 && size > 0
1865 && copy_to_user(ctl->data, buf, size) != 0)
1866 retval = -EFAULT;
1867
1868 kfree(buf);
1869 return retval;
1870 }
1871
1872 static int proc_ioctl_default(struct dev_state *ps, void __user *arg)
1873 {
1874 struct usbdevfs_ioctl ctrl;
1875
1876 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
1877 return -EFAULT;
1878 return proc_ioctl(ps, &ctrl);
1879 }
1880
1881 #ifdef CONFIG_COMPAT
1882 static int proc_ioctl_compat(struct dev_state *ps, compat_uptr_t arg)
1883 {
1884 struct usbdevfs_ioctl32 __user *uioc;
1885 struct usbdevfs_ioctl ctrl;
1886 u32 udata;
1887
1888 uioc = compat_ptr((long)arg);
1889 if (!access_ok(VERIFY_READ, uioc, sizeof(*uioc)) ||
1890 __get_user(ctrl.ifno, &uioc->ifno) ||
1891 __get_user(ctrl.ioctl_code, &uioc->ioctl_code) ||
1892 __get_user(udata, &uioc->data))
1893 return -EFAULT;
1894 ctrl.data = compat_ptr(udata);
1895
1896 return proc_ioctl(ps, &ctrl);
1897 }
1898 #endif
1899
1900 static int proc_claim_port(struct dev_state *ps, void __user *arg)
1901 {
1902 unsigned portnum;
1903 int rc;
1904
1905 if (get_user(portnum, (unsigned __user *) arg))
1906 return -EFAULT;
1907 rc = usb_hub_claim_port(ps->dev, portnum, ps);
1908 if (rc == 0)
1909 snoop(&ps->dev->dev, "port %d claimed by process %d: %s\n",
1910 portnum, task_pid_nr(current), current->comm);
1911 return rc;
1912 }
1913
1914 static int proc_release_port(struct dev_state *ps, void __user *arg)
1915 {
1916 unsigned portnum;
1917
1918 if (get_user(portnum, (unsigned __user *) arg))
1919 return -EFAULT;
1920 return usb_hub_release_port(ps->dev, portnum, ps);
1921 }
1922
1923 static int proc_get_capabilities(struct dev_state *ps, void __user *arg)
1924 {
1925 __u32 caps;
1926
1927 caps = USBDEVFS_CAP_ZERO_PACKET | USBDEVFS_CAP_NO_PACKET_SIZE_LIM;
1928 if (!ps->dev->bus->no_stop_on_short)
1929 caps |= USBDEVFS_CAP_BULK_CONTINUATION;
1930 if (ps->dev->bus->sg_tablesize)
1931 caps |= USBDEVFS_CAP_BULK_SCATTER_GATHER;
1932
1933 if (put_user(caps, (__u32 __user *)arg))
1934 return -EFAULT;
1935
1936 return 0;
1937 }
1938
1939 static int proc_disconnect_claim(struct dev_state *ps, void __user *arg)
1940 {
1941 struct usbdevfs_disconnect_claim dc;
1942 struct usb_interface *intf;
1943
1944 if (copy_from_user(&dc, arg, sizeof(dc)))
1945 return -EFAULT;
1946
1947 intf = usb_ifnum_to_if(ps->dev, dc.interface);
1948 if (!intf)
1949 return -EINVAL;
1950
1951 if (intf->dev.driver) {
1952 struct usb_driver *driver = to_usb_driver(intf->dev.driver);
1953
1954 if ((dc.flags & USBDEVFS_DISCONNECT_CLAIM_IF_DRIVER) &&
1955 strncmp(dc.driver, intf->dev.driver->name,
1956 sizeof(dc.driver)) != 0)
1957 return -EBUSY;
1958
1959 if ((dc.flags & USBDEVFS_DISCONNECT_CLAIM_EXCEPT_DRIVER) &&
1960 strncmp(dc.driver, intf->dev.driver->name,
1961 sizeof(dc.driver)) == 0)
1962 return -EBUSY;
1963
1964 dev_dbg(&intf->dev, "disconnect by usbfs\n");
1965 usb_driver_release_interface(driver, intf);
1966 }
1967
1968 return claimintf(ps, dc.interface);
1969 }
1970
1971 /*
1972 * NOTE: All requests here that have interface numbers as parameters
1973 * are assuming that somehow the configuration has been prevented from
1974 * changing. But there's no mechanism to ensure that...
1975 */
1976 static long usbdev_do_ioctl(struct file *file, unsigned int cmd,
1977 void __user *p)
1978 {
1979 struct dev_state *ps = file->private_data;
1980 struct inode *inode = file_inode(file);
1981 struct usb_device *dev = ps->dev;
1982 int ret = -ENOTTY;
1983
1984 if (!(file->f_mode & FMODE_WRITE))
1985 return -EPERM;
1986
1987 usb_lock_device(dev);
1988 if (!connected(ps)) {
1989 usb_unlock_device(dev);
1990 return -ENODEV;
1991 }
1992
1993 switch (cmd) {
1994 case USBDEVFS_CONTROL:
1995 snoop(&dev->dev, "%s: CONTROL\n", __func__);
1996 ret = proc_control(ps, p);
1997 if (ret >= 0)
1998 inode->i_mtime = CURRENT_TIME;
1999 break;
2000
2001 case USBDEVFS_BULK:
2002 snoop(&dev->dev, "%s: BULK\n", __func__);
2003 ret = proc_bulk(ps, p);
2004 if (ret >= 0)
2005 inode->i_mtime = CURRENT_TIME;
2006 break;
2007
2008 case USBDEVFS_RESETEP:
2009 snoop(&dev->dev, "%s: RESETEP\n", __func__);
2010 ret = proc_resetep(ps, p);
2011 if (ret >= 0)
2012 inode->i_mtime = CURRENT_TIME;
2013 break;
2014
2015 case USBDEVFS_RESET:
2016 snoop(&dev->dev, "%s: RESET\n", __func__);
2017 ret = proc_resetdevice(ps);
2018 break;
2019
2020 case USBDEVFS_CLEAR_HALT:
2021 snoop(&dev->dev, "%s: CLEAR_HALT\n", __func__);
2022 ret = proc_clearhalt(ps, p);
2023 if (ret >= 0)
2024 inode->i_mtime = CURRENT_TIME;
2025 break;
2026
2027 case USBDEVFS_GETDRIVER:
2028 snoop(&dev->dev, "%s: GETDRIVER\n", __func__);
2029 ret = proc_getdriver(ps, p);
2030 break;
2031
2032 case USBDEVFS_CONNECTINFO:
2033 snoop(&dev->dev, "%s: CONNECTINFO\n", __func__);
2034 ret = proc_connectinfo(ps, p);
2035 break;
2036
2037 case USBDEVFS_SETINTERFACE:
2038 snoop(&dev->dev, "%s: SETINTERFACE\n", __func__);
2039 ret = proc_setintf(ps, p);
2040 break;
2041
2042 case USBDEVFS_SETCONFIGURATION:
2043 snoop(&dev->dev, "%s: SETCONFIGURATION\n", __func__);
2044 ret = proc_setconfig(ps, p);
2045 break;
2046
2047 case USBDEVFS_SUBMITURB:
2048 snoop(&dev->dev, "%s: SUBMITURB\n", __func__);
2049 ret = proc_submiturb(ps, p);
2050 if (ret >= 0)
2051 inode->i_mtime = CURRENT_TIME;
2052 break;
2053
2054 #ifdef CONFIG_COMPAT
2055 case USBDEVFS_CONTROL32:
2056 snoop(&dev->dev, "%s: CONTROL32\n", __func__);
2057 ret = proc_control_compat(ps, p);
2058 if (ret >= 0)
2059 inode->i_mtime = CURRENT_TIME;
2060 break;
2061
2062 case USBDEVFS_BULK32:
2063 snoop(&dev->dev, "%s: BULK32\n", __func__);
2064 ret = proc_bulk_compat(ps, p);
2065 if (ret >= 0)
2066 inode->i_mtime = CURRENT_TIME;
2067 break;
2068
2069 case USBDEVFS_DISCSIGNAL32:
2070 snoop(&dev->dev, "%s: DISCSIGNAL32\n", __func__);
2071 ret = proc_disconnectsignal_compat(ps, p);
2072 break;
2073
2074 case USBDEVFS_SUBMITURB32:
2075 snoop(&dev->dev, "%s: SUBMITURB32\n", __func__);
2076 ret = proc_submiturb_compat(ps, p);
2077 if (ret >= 0)
2078 inode->i_mtime = CURRENT_TIME;
2079 break;
2080
2081 case USBDEVFS_REAPURB32:
2082 snoop(&dev->dev, "%s: REAPURB32\n", __func__);
2083 ret = proc_reapurb_compat(ps, p);
2084 break;
2085
2086 case USBDEVFS_REAPURBNDELAY32:
2087 snoop(&dev->dev, "%s: REAPURBNDELAY32\n", __func__);
2088 ret = proc_reapurbnonblock_compat(ps, p);
2089 break;
2090
2091 case USBDEVFS_IOCTL32:
2092 snoop(&dev->dev, "%s: IOCTL32\n", __func__);
2093 ret = proc_ioctl_compat(ps, ptr_to_compat(p));
2094 break;
2095 #endif
2096
2097 case USBDEVFS_DISCARDURB:
2098 snoop(&dev->dev, "%s: DISCARDURB\n", __func__);
2099 ret = proc_unlinkurb(ps, p);
2100 break;
2101
2102 case USBDEVFS_REAPURB:
2103 snoop(&dev->dev, "%s: REAPURB\n", __func__);
2104 ret = proc_reapurb(ps, p);
2105 break;
2106
2107 case USBDEVFS_REAPURBNDELAY:
2108 snoop(&dev->dev, "%s: REAPURBNDELAY\n", __func__);
2109 ret = proc_reapurbnonblock(ps, p);
2110 break;
2111
2112 case USBDEVFS_DISCSIGNAL:
2113 snoop(&dev->dev, "%s: DISCSIGNAL\n", __func__);
2114 ret = proc_disconnectsignal(ps, p);
2115 break;
2116
2117 case USBDEVFS_CLAIMINTERFACE:
2118 snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __func__);
2119 ret = proc_claiminterface(ps, p);
2120 break;
2121
2122 case USBDEVFS_RELEASEINTERFACE:
2123 snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __func__);
2124 ret = proc_releaseinterface(ps, p);
2125 break;
2126
2127 case USBDEVFS_IOCTL:
2128 snoop(&dev->dev, "%s: IOCTL\n", __func__);
2129 ret = proc_ioctl_default(ps, p);
2130 break;
2131
2132 case USBDEVFS_CLAIM_PORT:
2133 snoop(&dev->dev, "%s: CLAIM_PORT\n", __func__);
2134 ret = proc_claim_port(ps, p);
2135 break;
2136
2137 case USBDEVFS_RELEASE_PORT:
2138 snoop(&dev->dev, "%s: RELEASE_PORT\n", __func__);
2139 ret = proc_release_port(ps, p);
2140 break;
2141 case USBDEVFS_GET_CAPABILITIES:
2142 ret = proc_get_capabilities(ps, p);
2143 break;
2144 case USBDEVFS_DISCONNECT_CLAIM:
2145 ret = proc_disconnect_claim(ps, p);
2146 break;
2147 }
2148 usb_unlock_device(dev);
2149 if (ret >= 0)
2150 inode->i_atime = CURRENT_TIME;
2151 return ret;
2152 }
2153
2154 static long usbdev_ioctl(struct file *file, unsigned int cmd,
2155 unsigned long arg)
2156 {
2157 int ret;
2158
2159 ret = usbdev_do_ioctl(file, cmd, (void __user *)arg);
2160
2161 return ret;
2162 }
2163
2164 #ifdef CONFIG_COMPAT
2165 static long usbdev_compat_ioctl(struct file *file, unsigned int cmd,
2166 unsigned long arg)
2167 {
2168 int ret;
2169
2170 ret = usbdev_do_ioctl(file, cmd, compat_ptr(arg));
2171
2172 return ret;
2173 }
2174 #endif
2175
2176 /* No kernel lock - fine */
2177 static unsigned int usbdev_poll(struct file *file,
2178 struct poll_table_struct *wait)
2179 {
2180 struct dev_state *ps = file->private_data;
2181 unsigned int mask = 0;
2182
2183 poll_wait(file, &ps->wait, wait);
2184 if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed))
2185 mask |= POLLOUT | POLLWRNORM;
2186 if (!connected(ps))
2187 mask |= POLLERR | POLLHUP;
2188 return mask;
2189 }
2190
2191 const struct file_operations usbdev_file_operations = {
2192 .owner = THIS_MODULE,
2193 .llseek = usbdev_lseek,
2194 .read = usbdev_read,
2195 .poll = usbdev_poll,
2196 .unlocked_ioctl = usbdev_ioctl,
2197 #ifdef CONFIG_COMPAT
2198 .compat_ioctl = usbdev_compat_ioctl,
2199 #endif
2200 .open = usbdev_open,
2201 .release = usbdev_release,
2202 };
2203
2204 static void usbdev_remove(struct usb_device *udev)
2205 {
2206 struct dev_state *ps;
2207 struct siginfo sinfo;
2208
2209 while (!list_empty(&udev->filelist)) {
2210 ps = list_entry(udev->filelist.next, struct dev_state, list);
2211 destroy_all_async(ps);
2212 wake_up_all(&ps->wait);
2213 list_del_init(&ps->list);
2214 if (ps->discsignr) {
2215 sinfo.si_signo = ps->discsignr;
2216 sinfo.si_errno = EPIPE;
2217 sinfo.si_code = SI_ASYNCIO;
2218 sinfo.si_addr = ps->disccontext;
2219 kill_pid_info_as_cred(ps->discsignr, &sinfo,
2220 ps->disc_pid, ps->cred, ps->secid);
2221 }
2222 }
2223 }
2224
2225 static int usbdev_notify(struct notifier_block *self,
2226 unsigned long action, void *dev)
2227 {
2228 switch (action) {
2229 case USB_DEVICE_ADD:
2230 break;
2231 case USB_DEVICE_REMOVE:
2232 usbdev_remove(dev);
2233 break;
2234 }
2235 return NOTIFY_OK;
2236 }
2237
2238 static struct notifier_block usbdev_nb = {
2239 .notifier_call = usbdev_notify,
2240 };
2241
2242 static struct cdev usb_device_cdev;
2243
2244 int __init usb_devio_init(void)
2245 {
2246 int retval;
2247
2248 retval = register_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX,
2249 "usb_device");
2250 if (retval) {
2251 printk(KERN_ERR "Unable to register minors for usb_device\n");
2252 goto out;
2253 }
2254 cdev_init(&usb_device_cdev, &usbdev_file_operations);
2255 retval = cdev_add(&usb_device_cdev, USB_DEVICE_DEV, USB_DEVICE_MAX);
2256 if (retval) {
2257 printk(KERN_ERR "Unable to get usb_device major %d\n",
2258 USB_DEVICE_MAJOR);
2259 goto error_cdev;
2260 }
2261 usb_register_notify(&usbdev_nb);
2262 out:
2263 return retval;
2264
2265 error_cdev:
2266 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
2267 goto out;
2268 }
2269
2270 void usb_devio_cleanup(void)
2271 {
2272 usb_unregister_notify(&usbdev_nb);
2273 cdev_del(&usb_device_cdev);
2274 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
2275 }
kernel source for telekom puls (alcatel/mediatek)