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Linux 3.9-rc4
[linux-2.6/cjktty.git] / drivers / usb / core / devio.c
blob8823e98989fe9fe1a760d8c276a31ae718103f59
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 ret = findintfep(ps->dev, index);
743 if (ret >= 0)
744 ret = checkintf(ps, ret);
745 break;
746
747 case USB_RECIP_INTERFACE:
748 ret = checkintf(ps, index);
749 break;
750 }
751 return ret;
752 }
753
754 static int match_devt(struct device *dev, void *data)
755 {
756 return dev->devt == (dev_t) (unsigned long) data;
757 }
758
759 static struct usb_device *usbdev_lookup_by_devt(dev_t devt)
760 {
761 struct device *dev;
762
763 dev = bus_find_device(&usb_bus_type, NULL,
764 (void *) (unsigned long) devt, match_devt);
765 if (!dev)
766 return NULL;
767 return container_of(dev, struct usb_device, dev);
768 }
769
770 /*
771 * file operations
772 */
773 static int usbdev_open(struct inode *inode, struct file *file)
774 {
775 struct usb_device *dev = NULL;
776 struct dev_state *ps;
777 int ret;
778
779 ret = -ENOMEM;
780 ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL);
781 if (!ps)
782 goto out_free_ps;
783
784 ret = -ENODEV;
785
786 /* Protect against simultaneous removal or release */
787 mutex_lock(&usbfs_mutex);
788
789 /* usbdev device-node */
790 if (imajor(inode) == USB_DEVICE_MAJOR)
791 dev = usbdev_lookup_by_devt(inode->i_rdev);
792
793 mutex_unlock(&usbfs_mutex);
794
795 if (!dev)
796 goto out_free_ps;
797
798 usb_lock_device(dev);
799 if (dev->state == USB_STATE_NOTATTACHED)
800 goto out_unlock_device;
801
802 ret = usb_autoresume_device(dev);
803 if (ret)
804 goto out_unlock_device;
805
806 ps->dev = dev;
807 ps->file = file;
808 spin_lock_init(&ps->lock);
809 INIT_LIST_HEAD(&ps->list);
810 INIT_LIST_HEAD(&ps->async_pending);
811 INIT_LIST_HEAD(&ps->async_completed);
812 init_waitqueue_head(&ps->wait);
813 ps->discsignr = 0;
814 ps->disc_pid = get_pid(task_pid(current));
815 ps->cred = get_current_cred();
816 ps->disccontext = NULL;
817 ps->ifclaimed = 0;
818 security_task_getsecid(current, &ps->secid);
819 smp_wmb();
820 list_add_tail(&ps->list, &dev->filelist);
821 file->private_data = ps;
822 usb_unlock_device(dev);
823 snoop(&dev->dev, "opened by process %d: %s\n", task_pid_nr(current),
824 current->comm);
825 return ret;
826
827 out_unlock_device:
828 usb_unlock_device(dev);
829 usb_put_dev(dev);
830 out_free_ps:
831 kfree(ps);
832 return ret;
833 }
834
835 static int usbdev_release(struct inode *inode, struct file *file)
836 {
837 struct dev_state *ps = file->private_data;
838 struct usb_device *dev = ps->dev;
839 unsigned int ifnum;
840 struct async *as;
841
842 usb_lock_device(dev);
843 usb_hub_release_all_ports(dev, ps);
844
845 list_del_init(&ps->list);
846
847 for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed);
848 ifnum++) {
849 if (test_bit(ifnum, &ps->ifclaimed))
850 releaseintf(ps, ifnum);
851 }
852 destroy_all_async(ps);
853 usb_autosuspend_device(dev);
854 usb_unlock_device(dev);
855 usb_put_dev(dev);
856 put_pid(ps->disc_pid);
857 put_cred(ps->cred);
858
859 as = async_getcompleted(ps);
860 while (as) {
861 free_async(as);
862 as = async_getcompleted(ps);
863 }
864 kfree(ps);
865 return 0;
866 }
867
868 static int proc_control(struct dev_state *ps, void __user *arg)
869 {
870 struct usb_device *dev = ps->dev;
871 struct usbdevfs_ctrltransfer ctrl;
872 unsigned int tmo;
873 unsigned char *tbuf;
874 unsigned wLength;
875 int i, pipe, ret;
876
877 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
878 return -EFAULT;
879 ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.bRequest,
880 ctrl.wIndex);
881 if (ret)
882 return ret;
883 wLength = ctrl.wLength; /* To suppress 64k PAGE_SIZE warning */
884 if (wLength > PAGE_SIZE)
885 return -EINVAL;
886 ret = usbfs_increase_memory_usage(PAGE_SIZE + sizeof(struct urb) +
887 sizeof(struct usb_ctrlrequest));
888 if (ret)
889 return ret;
890 tbuf = (unsigned char *)__get_free_page(GFP_KERNEL);
891 if (!tbuf) {
892 ret = -ENOMEM;
893 goto done;
894 }
895 tmo = ctrl.timeout;
896 snoop(&dev->dev, "control urb: bRequestType=%02x "
897 "bRequest=%02x wValue=%04x "
898 "wIndex=%04x wLength=%04x\n",
899 ctrl.bRequestType, ctrl.bRequest,
900 __le16_to_cpup(&ctrl.wValue),
901 __le16_to_cpup(&ctrl.wIndex),
902 __le16_to_cpup(&ctrl.wLength));
903 if (ctrl.bRequestType & 0x80) {
904 if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data,
905 ctrl.wLength)) {
906 ret = -EINVAL;
907 goto done;
908 }
909 pipe = usb_rcvctrlpipe(dev, 0);
910 snoop_urb(dev, NULL, pipe, ctrl.wLength, tmo, SUBMIT, NULL, 0);
911
912 usb_unlock_device(dev);
913 i = usb_control_msg(dev, pipe, ctrl.bRequest,
914 ctrl.bRequestType, ctrl.wValue, ctrl.wIndex,
915 tbuf, ctrl.wLength, tmo);
916 usb_lock_device(dev);
917 snoop_urb(dev, NULL, pipe, max(i, 0), min(i, 0), COMPLETE,
918 tbuf, max(i, 0));
919 if ((i > 0) && ctrl.wLength) {
920 if (copy_to_user(ctrl.data, tbuf, i)) {
921 ret = -EFAULT;
922 goto done;
923 }
924 }
925 } else {
926 if (ctrl.wLength) {
927 if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) {
928 ret = -EFAULT;
929 goto done;
930 }
931 }
932 pipe = usb_sndctrlpipe(dev, 0);
933 snoop_urb(dev, NULL, pipe, ctrl.wLength, tmo, SUBMIT,
934 tbuf, ctrl.wLength);
935
936 usb_unlock_device(dev);
937 i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest,
938 ctrl.bRequestType, ctrl.wValue, ctrl.wIndex,
939 tbuf, ctrl.wLength, tmo);
940 usb_lock_device(dev);
941 snoop_urb(dev, NULL, pipe, max(i, 0), min(i, 0), COMPLETE, NULL, 0);
942 }
943 if (i < 0 && i != -EPIPE) {
944 dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL "
945 "failed cmd %s rqt %u rq %u len %u ret %d\n",
946 current->comm, ctrl.bRequestType, ctrl.bRequest,
947 ctrl.wLength, i);
948 }
949 ret = i;
950 done:
951 free_page((unsigned long) tbuf);
952 usbfs_decrease_memory_usage(PAGE_SIZE + sizeof(struct urb) +
953 sizeof(struct usb_ctrlrequest));
954 return ret;
955 }
956
957 static int proc_bulk(struct dev_state *ps, void __user *arg)
958 {
959 struct usb_device *dev = ps->dev;
960 struct usbdevfs_bulktransfer bulk;
961 unsigned int tmo, len1, pipe;
962 int len2;
963 unsigned char *tbuf;
964 int i, ret;
965
966 if (copy_from_user(&bulk, arg, sizeof(bulk)))
967 return -EFAULT;
968 ret = findintfep(ps->dev, bulk.ep);
969 if (ret < 0)
970 return ret;
971 ret = checkintf(ps, ret);
972 if (ret)
973 return ret;
974 if (bulk.ep & USB_DIR_IN)
975 pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f);
976 else
977 pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f);
978 if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN)))
979 return -EINVAL;
980 len1 = bulk.len;
981 if (len1 >= USBFS_XFER_MAX)
982 return -EINVAL;
983 ret = usbfs_increase_memory_usage(len1 + sizeof(struct urb));
984 if (ret)
985 return ret;
986 if (!(tbuf = kmalloc(len1, GFP_KERNEL))) {
987 ret = -ENOMEM;
988 goto done;
989 }
990 tmo = bulk.timeout;
991 if (bulk.ep & 0x80) {
992 if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) {
993 ret = -EINVAL;
994 goto done;
995 }
996 snoop_urb(dev, NULL, pipe, len1, tmo, SUBMIT, NULL, 0);
997
998 usb_unlock_device(dev);
999 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
1000 usb_lock_device(dev);
1001 snoop_urb(dev, NULL, pipe, len2, i, COMPLETE, tbuf, len2);
1002
1003 if (!i && len2) {
1004 if (copy_to_user(bulk.data, tbuf, len2)) {
1005 ret = -EFAULT;
1006 goto done;
1007 }
1008 }
1009 } else {
1010 if (len1) {
1011 if (copy_from_user(tbuf, bulk.data, len1)) {
1012 ret = -EFAULT;
1013 goto done;
1014 }
1015 }
1016 snoop_urb(dev, NULL, pipe, len1, tmo, SUBMIT, tbuf, len1);
1017
1018 usb_unlock_device(dev);
1019 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
1020 usb_lock_device(dev);
1021 snoop_urb(dev, NULL, pipe, len2, i, COMPLETE, NULL, 0);
1022 }
1023 ret = (i < 0 ? i : len2);
1024 done:
1025 kfree(tbuf);
1026 usbfs_decrease_memory_usage(len1 + sizeof(struct urb));
1027 return ret;
1028 }
1029
1030 static int proc_resetep(struct dev_state *ps, void __user *arg)
1031 {
1032 unsigned int ep;
1033 int ret;
1034
1035 if (get_user(ep, (unsigned int __user *)arg))
1036 return -EFAULT;
1037 ret = findintfep(ps->dev, ep);
1038 if (ret < 0)
1039 return ret;
1040 ret = checkintf(ps, ret);
1041 if (ret)
1042 return ret;
1043 usb_reset_endpoint(ps->dev, ep);
1044 return 0;
1045 }
1046
1047 static int proc_clearhalt(struct dev_state *ps, void __user *arg)
1048 {
1049 unsigned int ep;
1050 int pipe;
1051 int ret;
1052
1053 if (get_user(ep, (unsigned int __user *)arg))
1054 return -EFAULT;
1055 ret = findintfep(ps->dev, ep);
1056 if (ret < 0)
1057 return ret;
1058 ret = checkintf(ps, ret);
1059 if (ret)
1060 return ret;
1061 if (ep & USB_DIR_IN)
1062 pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f);
1063 else
1064 pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f);
1065
1066 return usb_clear_halt(ps->dev, pipe);
1067 }
1068
1069 static int proc_getdriver(struct dev_state *ps, void __user *arg)
1070 {
1071 struct usbdevfs_getdriver gd;
1072 struct usb_interface *intf;
1073 int ret;
1074
1075 if (copy_from_user(&gd, arg, sizeof(gd)))
1076 return -EFAULT;
1077 intf = usb_ifnum_to_if(ps->dev, gd.interface);
1078 if (!intf || !intf->dev.driver)
1079 ret = -ENODATA;
1080 else {
1081 strlcpy(gd.driver, intf->dev.driver->name,
1082 sizeof(gd.driver));
1083 ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0);
1084 }
1085 return ret;
1086 }
1087
1088 static int proc_connectinfo(struct dev_state *ps, void __user *arg)
1089 {
1090 struct usbdevfs_connectinfo ci = {
1091 .devnum = ps->dev->devnum,
1092 .slow = ps->dev->speed == USB_SPEED_LOW
1093 };
1094
1095 if (copy_to_user(arg, &ci, sizeof(ci)))
1096 return -EFAULT;
1097 return 0;
1098 }
1099
1100 static int proc_resetdevice(struct dev_state *ps)
1101 {
1102 return usb_reset_device(ps->dev);
1103 }
1104
1105 static int proc_setintf(struct dev_state *ps, void __user *arg)
1106 {
1107 struct usbdevfs_setinterface setintf;
1108 int ret;
1109
1110 if (copy_from_user(&setintf, arg, sizeof(setintf)))
1111 return -EFAULT;
1112 if ((ret = checkintf(ps, setintf.interface)))
1113 return ret;
1114 return usb_set_interface(ps->dev, setintf.interface,
1115 setintf.altsetting);
1116 }
1117
1118 static int proc_setconfig(struct dev_state *ps, void __user *arg)
1119 {
1120 int u;
1121 int status = 0;
1122 struct usb_host_config *actconfig;
1123
1124 if (get_user(u, (int __user *)arg))
1125 return -EFAULT;
1126
1127 actconfig = ps->dev->actconfig;
1128
1129 /* Don't touch the device if any interfaces are claimed.
1130 * It could interfere with other drivers' operations, and if
1131 * an interface is claimed by usbfs it could easily deadlock.
1132 */
1133 if (actconfig) {
1134 int i;
1135
1136 for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) {
1137 if (usb_interface_claimed(actconfig->interface[i])) {
1138 dev_warn(&ps->dev->dev,
1139 "usbfs: interface %d claimed by %s "
1140 "while '%s' sets config #%d\n",
1141 actconfig->interface[i]
1142 ->cur_altsetting
1143 ->desc.bInterfaceNumber,
1144 actconfig->interface[i]
1145 ->dev.driver->name,
1146 current->comm, u);
1147 status = -EBUSY;
1148 break;
1149 }
1150 }
1151 }
1152
1153 /* SET_CONFIGURATION is often abused as a "cheap" driver reset,
1154 * so avoid usb_set_configuration()'s kick to sysfs
1155 */
1156 if (status == 0) {
1157 if (actconfig && actconfig->desc.bConfigurationValue == u)
1158 status = usb_reset_configuration(ps->dev);
1159 else
1160 status = usb_set_configuration(ps->dev, u);
1161 }
1162
1163 return status;
1164 }
1165
1166 static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
1167 struct usbdevfs_iso_packet_desc __user *iso_frame_desc,
1168 void __user *arg)
1169 {
1170 struct usbdevfs_iso_packet_desc *isopkt = NULL;
1171 struct usb_host_endpoint *ep;
1172 struct async *as = NULL;
1173 struct usb_ctrlrequest *dr = NULL;
1174 unsigned int u, totlen, isofrmlen;
1175 int i, ret, is_in, num_sgs = 0, ifnum = -1;
1176 void *buf;
1177
1178 if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP |
1179 USBDEVFS_URB_SHORT_NOT_OK |
1180 USBDEVFS_URB_BULK_CONTINUATION |
1181 USBDEVFS_URB_NO_FSBR |
1182 USBDEVFS_URB_ZERO_PACKET |
1183 USBDEVFS_URB_NO_INTERRUPT))
1184 return -EINVAL;
1185 if (uurb->buffer_length > 0 && !uurb->buffer)
1186 return -EINVAL;
1187 if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL &&
1188 (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) {
1189 ifnum = findintfep(ps->dev, uurb->endpoint);
1190 if (ifnum < 0)
1191 return ifnum;
1192 ret = checkintf(ps, ifnum);
1193 if (ret)
1194 return ret;
1195 }
1196 if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0) {
1197 is_in = 1;
1198 ep = ps->dev->ep_in[uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
1199 } else {
1200 is_in = 0;
1201 ep = ps->dev->ep_out[uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
1202 }
1203 if (!ep)
1204 return -ENOENT;
1205
1206 u = 0;
1207 switch(uurb->type) {
1208 case USBDEVFS_URB_TYPE_CONTROL:
1209 if (!usb_endpoint_xfer_control(&ep->desc))
1210 return -EINVAL;
1211 /* min 8 byte setup packet */
1212 if (uurb->buffer_length < 8)
1213 return -EINVAL;
1214 dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL);
1215 if (!dr)
1216 return -ENOMEM;
1217 if (copy_from_user(dr, uurb->buffer, 8)) {
1218 ret = -EFAULT;
1219 goto error;
1220 }
1221 if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) {
1222 ret = -EINVAL;
1223 goto error;
1224 }
1225 ret = check_ctrlrecip(ps, dr->bRequestType, dr->bRequest,
1226 le16_to_cpup(&dr->wIndex));
1227 if (ret)
1228 goto error;
1229 uurb->number_of_packets = 0;
1230 uurb->buffer_length = le16_to_cpup(&dr->wLength);
1231 uurb->buffer += 8;
1232 if ((dr->bRequestType & USB_DIR_IN) && uurb->buffer_length) {
1233 is_in = 1;
1234 uurb->endpoint |= USB_DIR_IN;
1235 } else {
1236 is_in = 0;
1237 uurb->endpoint &= ~USB_DIR_IN;
1238 }
1239 snoop(&ps->dev->dev, "control urb: bRequestType=%02x "
1240 "bRequest=%02x wValue=%04x "
1241 "wIndex=%04x wLength=%04x\n",
1242 dr->bRequestType, dr->bRequest,
1243 __le16_to_cpup(&dr->wValue),
1244 __le16_to_cpup(&dr->wIndex),
1245 __le16_to_cpup(&dr->wLength));
1246 u = sizeof(struct usb_ctrlrequest);
1247 break;
1248
1249 case USBDEVFS_URB_TYPE_BULK:
1250 switch (usb_endpoint_type(&ep->desc)) {
1251 case USB_ENDPOINT_XFER_CONTROL:
1252 case USB_ENDPOINT_XFER_ISOC:
1253 return -EINVAL;
1254 case USB_ENDPOINT_XFER_INT:
1255 /* allow single-shot interrupt transfers */
1256 uurb->type = USBDEVFS_URB_TYPE_INTERRUPT;
1257 goto interrupt_urb;
1258 }
1259 uurb->number_of_packets = 0;
1260 num_sgs = DIV_ROUND_UP(uurb->buffer_length, USB_SG_SIZE);
1261 if (num_sgs == 1 || num_sgs > ps->dev->bus->sg_tablesize)
1262 num_sgs = 0;
1263 break;
1264
1265 case USBDEVFS_URB_TYPE_INTERRUPT:
1266 if (!usb_endpoint_xfer_int(&ep->desc))
1267 return -EINVAL;
1268 interrupt_urb:
1269 uurb->number_of_packets = 0;
1270 break;
1271
1272 case USBDEVFS_URB_TYPE_ISO:
1273 /* arbitrary limit */
1274 if (uurb->number_of_packets < 1 ||
1275 uurb->number_of_packets > 128)
1276 return -EINVAL;
1277 if (!usb_endpoint_xfer_isoc(&ep->desc))
1278 return -EINVAL;
1279 isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) *
1280 uurb->number_of_packets;
1281 if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL)))
1282 return -ENOMEM;
1283 if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) {
1284 ret = -EFAULT;
1285 goto error;
1286 }
1287 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
1288 /* arbitrary limit,
1289 * sufficient for USB 2.0 high-bandwidth iso */
1290 if (isopkt[u].length > 8192) {
1291 ret = -EINVAL;
1292 goto error;
1293 }
1294 totlen += isopkt[u].length;
1295 }
1296 u *= sizeof(struct usb_iso_packet_descriptor);
1297 uurb->buffer_length = totlen;
1298 break;
1299
1300 default:
1301 return -EINVAL;
1302 }
1303
1304 if (uurb->buffer_length >= USBFS_XFER_MAX) {
1305 ret = -EINVAL;
1306 goto error;
1307 }
1308 if (uurb->buffer_length > 0 &&
1309 !access_ok(is_in ? VERIFY_WRITE : VERIFY_READ,
1310 uurb->buffer, uurb->buffer_length)) {
1311 ret = -EFAULT;
1312 goto error;
1313 }
1314 as = alloc_async(uurb->number_of_packets);
1315 if (!as) {
1316 ret = -ENOMEM;
1317 goto error;
1318 }
1319
1320 u += sizeof(struct async) + sizeof(struct urb) + uurb->buffer_length +
1321 num_sgs * sizeof(struct scatterlist);
1322 ret = usbfs_increase_memory_usage(u);
1323 if (ret)
1324 goto error;
1325 as->mem_usage = u;
1326
1327 if (num_sgs) {
1328 as->urb->sg = kmalloc(num_sgs * sizeof(struct scatterlist),
1329 GFP_KERNEL);
1330 if (!as->urb->sg) {
1331 ret = -ENOMEM;
1332 goto error;
1333 }
1334 as->urb->num_sgs = num_sgs;
1335 sg_init_table(as->urb->sg, as->urb->num_sgs);
1336
1337 totlen = uurb->buffer_length;
1338 for (i = 0; i < as->urb->num_sgs; i++) {
1339 u = (totlen > USB_SG_SIZE) ? USB_SG_SIZE : totlen;
1340 buf = kmalloc(u, GFP_KERNEL);
1341 if (!buf) {
1342 ret = -ENOMEM;
1343 goto error;
1344 }
1345 sg_set_buf(&as->urb->sg[i], buf, u);
1346
1347 if (!is_in) {
1348 if (copy_from_user(buf, uurb->buffer, u)) {
1349 ret = -EFAULT;
1350 goto error;
1351 }
1352 uurb->buffer += u;
1353 }
1354 totlen -= u;
1355 }
1356 } else if (uurb->buffer_length > 0) {
1357 as->urb->transfer_buffer = kmalloc(uurb->buffer_length,
1358 GFP_KERNEL);
1359 if (!as->urb->transfer_buffer) {
1360 ret = -ENOMEM;
1361 goto error;
1362 }
1363
1364 if (!is_in) {
1365 if (copy_from_user(as->urb->transfer_buffer,
1366 uurb->buffer,
1367 uurb->buffer_length)) {
1368 ret = -EFAULT;
1369 goto error;
1370 }
1371 } else if (uurb->type == USBDEVFS_URB_TYPE_ISO) {
1372 /*
1373 * Isochronous input data may end up being
1374 * discontiguous if some of the packets are short.
1375 * Clear the buffer so that the gaps don't leak
1376 * kernel data to userspace.
1377 */
1378 memset(as->urb->transfer_buffer, 0,
1379 uurb->buffer_length);
1380 }
1381 }
1382 as->urb->dev = ps->dev;
1383 as->urb->pipe = (uurb->type << 30) |
1384 __create_pipe(ps->dev, uurb->endpoint & 0xf) |
1385 (uurb->endpoint & USB_DIR_IN);
1386
1387 /* This tedious sequence is necessary because the URB_* flags
1388 * are internal to the kernel and subject to change, whereas
1389 * the USBDEVFS_URB_* flags are a user API and must not be changed.
1390 */
1391 u = (is_in ? URB_DIR_IN : URB_DIR_OUT);
1392 if (uurb->flags & USBDEVFS_URB_ISO_ASAP)
1393 u |= URB_ISO_ASAP;
1394 if (uurb->flags & USBDEVFS_URB_SHORT_NOT_OK)
1395 u |= URB_SHORT_NOT_OK;
1396 if (uurb->flags & USBDEVFS_URB_NO_FSBR)
1397 u |= URB_NO_FSBR;
1398 if (uurb->flags & USBDEVFS_URB_ZERO_PACKET)
1399 u |= URB_ZERO_PACKET;
1400 if (uurb->flags & USBDEVFS_URB_NO_INTERRUPT)
1401 u |= URB_NO_INTERRUPT;
1402 as->urb->transfer_flags = u;
1403
1404 as->urb->transfer_buffer_length = uurb->buffer_length;
1405 as->urb->setup_packet = (unsigned char *)dr;
1406 dr = NULL;
1407 as->urb->start_frame = uurb->start_frame;
1408 as->urb->number_of_packets = uurb->number_of_packets;
1409 if (uurb->type == USBDEVFS_URB_TYPE_ISO ||
1410 ps->dev->speed == USB_SPEED_HIGH)
1411 as->urb->interval = 1 << min(15, ep->desc.bInterval - 1);
1412 else
1413 as->urb->interval = ep->desc.bInterval;
1414 as->urb->context = as;
1415 as->urb->complete = async_completed;
1416 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
1417 as->urb->iso_frame_desc[u].offset = totlen;
1418 as->urb->iso_frame_desc[u].length = isopkt[u].length;
1419 totlen += isopkt[u].length;
1420 }
1421 kfree(isopkt);
1422 isopkt = NULL;
1423 as->ps = ps;
1424 as->userurb = arg;
1425 if (is_in && uurb->buffer_length > 0)
1426 as->userbuffer = uurb->buffer;
1427 else
1428 as->userbuffer = NULL;
1429 as->signr = uurb->signr;
1430 as->ifnum = ifnum;
1431 as->pid = get_pid(task_pid(current));
1432 as->cred = get_current_cred();
1433 security_task_getsecid(current, &as->secid);
1434 snoop_urb(ps->dev, as->userurb, as->urb->pipe,
1435 as->urb->transfer_buffer_length, 0, SUBMIT,
1436 NULL, 0);
1437 if (!is_in)
1438 snoop_urb_data(as->urb, as->urb->transfer_buffer_length);
1439
1440 async_newpending(as);
1441
1442 if (usb_endpoint_xfer_bulk(&ep->desc)) {
1443 spin_lock_irq(&ps->lock);
1444
1445 /* Not exactly the endpoint address; the direction bit is
1446 * shifted to the 0x10 position so that the value will be
1447 * between 0 and 31.
1448 */
1449 as->bulk_addr = usb_endpoint_num(&ep->desc) |
1450 ((ep->desc.bEndpointAddress & USB_ENDPOINT_DIR_MASK)
1451 >> 3);
1452
1453 /* If this bulk URB is the start of a new transfer, re-enable
1454 * the endpoint. Otherwise mark it as a continuation URB.
1455 */
1456 if (uurb->flags & USBDEVFS_URB_BULK_CONTINUATION)
1457 as->bulk_status = AS_CONTINUATION;
1458 else
1459 ps->disabled_bulk_eps &= ~(1 << as->bulk_addr);
1460
1461 /* Don't accept continuation URBs if the endpoint is
1462 * disabled because of an earlier error.
1463 */
1464 if (ps->disabled_bulk_eps & (1 << as->bulk_addr))
1465 ret = -EREMOTEIO;
1466 else
1467 ret = usb_submit_urb(as->urb, GFP_ATOMIC);
1468 spin_unlock_irq(&ps->lock);
1469 } else {
1470 ret = usb_submit_urb(as->urb, GFP_KERNEL);
1471 }
1472
1473 if (ret) {
1474 dev_printk(KERN_DEBUG, &ps->dev->dev,
1475 "usbfs: usb_submit_urb returned %d\n", ret);
1476 snoop_urb(ps->dev, as->userurb, as->urb->pipe,
1477 0, ret, COMPLETE, NULL, 0);
1478 async_removepending(as);
1479 goto error;
1480 }
1481 return 0;
1482
1483 error:
1484 kfree(isopkt);
1485 kfree(dr);
1486 if (as)
1487 free_async(as);
1488 return ret;
1489 }
1490
1491 static int proc_submiturb(struct dev_state *ps, void __user *arg)
1492 {
1493 struct usbdevfs_urb uurb;
1494
1495 if (copy_from_user(&uurb, arg, sizeof(uurb)))
1496 return -EFAULT;
1497
1498 return proc_do_submiturb(ps, &uurb,
1499 (((struct usbdevfs_urb __user *)arg)->iso_frame_desc),
1500 arg);
1501 }
1502
1503 static int proc_unlinkurb(struct dev_state *ps, void __user *arg)
1504 {
1505 struct urb *urb;
1506 struct async *as;
1507 unsigned long flags;
1508
1509 spin_lock_irqsave(&ps->lock, flags);
1510 as = async_getpending(ps, arg);
1511 if (!as) {
1512 spin_unlock_irqrestore(&ps->lock, flags);
1513 return -EINVAL;
1514 }
1515
1516 urb = as->urb;
1517 usb_get_urb(urb);
1518 spin_unlock_irqrestore(&ps->lock, flags);
1519
1520 usb_kill_urb(urb);
1521 usb_put_urb(urb);
1522
1523 return 0;
1524 }
1525
1526 static int processcompl(struct async *as, void __user * __user *arg)
1527 {
1528 struct urb *urb = as->urb;
1529 struct usbdevfs_urb __user *userurb = as->userurb;
1530 void __user *addr = as->userurb;
1531 unsigned int i;
1532
1533 if (as->userbuffer && urb->actual_length) {
1534 if (copy_urb_data_to_user(as->userbuffer, urb))
1535 goto err_out;
1536 }
1537 if (put_user(as->status, &userurb->status))
1538 goto err_out;
1539 if (put_user(urb->actual_length, &userurb->actual_length))
1540 goto err_out;
1541 if (put_user(urb->error_count, &userurb->error_count))
1542 goto err_out;
1543
1544 if (usb_endpoint_xfer_isoc(&urb->ep->desc)) {
1545 for (i = 0; i < urb->number_of_packets; i++) {
1546 if (put_user(urb->iso_frame_desc[i].actual_length,
1547 &userurb->iso_frame_desc[i].actual_length))
1548 goto err_out;
1549 if (put_user(urb->iso_frame_desc[i].status,
1550 &userurb->iso_frame_desc[i].status))
1551 goto err_out;
1552 }
1553 }
1554
1555 if (put_user(addr, (void __user * __user *)arg))
1556 return -EFAULT;
1557 return 0;
1558
1559 err_out:
1560 return -EFAULT;
1561 }
1562
1563 static struct async *reap_as(struct dev_state *ps)
1564 {
1565 DECLARE_WAITQUEUE(wait, current);
1566 struct async *as = NULL;
1567 struct usb_device *dev = ps->dev;
1568
1569 add_wait_queue(&ps->wait, &wait);
1570 for (;;) {
1571 __set_current_state(TASK_INTERRUPTIBLE);
1572 as = async_getcompleted(ps);
1573 if (as)
1574 break;
1575 if (signal_pending(current))
1576 break;
1577 usb_unlock_device(dev);
1578 schedule();
1579 usb_lock_device(dev);
1580 }
1581 remove_wait_queue(&ps->wait, &wait);
1582 set_current_state(TASK_RUNNING);
1583 return as;
1584 }
1585
1586 static int proc_reapurb(struct dev_state *ps, void __user *arg)
1587 {
1588 struct async *as = reap_as(ps);
1589 if (as) {
1590 int retval = processcompl(as, (void __user * __user *)arg);
1591 free_async(as);
1592 return retval;
1593 }
1594 if (signal_pending(current))
1595 return -EINTR;
1596 return -EIO;
1597 }
1598
1599 static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg)
1600 {
1601 int retval;
1602 struct async *as;
1603
1604 as = async_getcompleted(ps);
1605 retval = -EAGAIN;
1606 if (as) {
1607 retval = processcompl(as, (void __user * __user *)arg);
1608 free_async(as);
1609 }
1610 return retval;
1611 }
1612
1613 #ifdef CONFIG_COMPAT
1614 static int proc_control_compat(struct dev_state *ps,
1615 struct usbdevfs_ctrltransfer32 __user *p32)
1616 {
1617 struct usbdevfs_ctrltransfer __user *p;
1618 __u32 udata;
1619 p = compat_alloc_user_space(sizeof(*p));
1620 if (copy_in_user(p, p32, (sizeof(*p32) - sizeof(compat_caddr_t))) ||
1621 get_user(udata, &p32->data) ||
1622 put_user(compat_ptr(udata), &p->data))
1623 return -EFAULT;
1624 return proc_control(ps, p);
1625 }
1626
1627 static int proc_bulk_compat(struct dev_state *ps,
1628 struct usbdevfs_bulktransfer32 __user *p32)
1629 {
1630 struct usbdevfs_bulktransfer __user *p;
1631 compat_uint_t n;
1632 compat_caddr_t addr;
1633
1634 p = compat_alloc_user_space(sizeof(*p));
1635
1636 if (get_user(n, &p32->ep) || put_user(n, &p->ep) ||
1637 get_user(n, &p32->len) || put_user(n, &p->len) ||
1638 get_user(n, &p32->timeout) || put_user(n, &p->timeout) ||
1639 get_user(addr, &p32->data) || put_user(compat_ptr(addr), &p->data))
1640 return -EFAULT;
1641
1642 return proc_bulk(ps, p);
1643 }
1644 static int proc_disconnectsignal_compat(struct dev_state *ps, void __user *arg)
1645 {
1646 struct usbdevfs_disconnectsignal32 ds;
1647
1648 if (copy_from_user(&ds, arg, sizeof(ds)))
1649 return -EFAULT;
1650 ps->discsignr = ds.signr;
1651 ps->disccontext = compat_ptr(ds.context);
1652 return 0;
1653 }
1654
1655 static int get_urb32(struct usbdevfs_urb *kurb,
1656 struct usbdevfs_urb32 __user *uurb)
1657 {
1658 __u32 uptr;
1659 if (!access_ok(VERIFY_READ, uurb, sizeof(*uurb)) ||
1660 __get_user(kurb->type, &uurb->type) ||
1661 __get_user(kurb->endpoint, &uurb->endpoint) ||
1662 __get_user(kurb->status, &uurb->status) ||
1663 __get_user(kurb->flags, &uurb->flags) ||
1664 __get_user(kurb->buffer_length, &uurb->buffer_length) ||
1665 __get_user(kurb->actual_length, &uurb->actual_length) ||
1666 __get_user(kurb->start_frame, &uurb->start_frame) ||
1667 __get_user(kurb->number_of_packets, &uurb->number_of_packets) ||
1668 __get_user(kurb->error_count, &uurb->error_count) ||
1669 __get_user(kurb->signr, &uurb->signr))
1670 return -EFAULT;
1671
1672 if (__get_user(uptr, &uurb->buffer))
1673 return -EFAULT;
1674 kurb->buffer = compat_ptr(uptr);
1675 if (__get_user(uptr, &uurb->usercontext))
1676 return -EFAULT;
1677 kurb->usercontext = compat_ptr(uptr);
1678
1679 return 0;
1680 }
1681
1682 static int proc_submiturb_compat(struct dev_state *ps, void __user *arg)
1683 {
1684 struct usbdevfs_urb uurb;
1685
1686 if (get_urb32(&uurb, (struct usbdevfs_urb32 __user *)arg))
1687 return -EFAULT;
1688
1689 return proc_do_submiturb(ps, &uurb,
1690 ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc,
1691 arg);
1692 }
1693
1694 static int processcompl_compat(struct async *as, void __user * __user *arg)
1695 {
1696 struct urb *urb = as->urb;
1697 struct usbdevfs_urb32 __user *userurb = as->userurb;
1698 void __user *addr = as->userurb;
1699 unsigned int i;
1700
1701 if (as->userbuffer && urb->actual_length) {
1702 if (copy_urb_data_to_user(as->userbuffer, urb))
1703 return -EFAULT;
1704 }
1705 if (put_user(as->status, &userurb->status))
1706 return -EFAULT;
1707 if (put_user(urb->actual_length, &userurb->actual_length))
1708 return -EFAULT;
1709 if (put_user(urb->error_count, &userurb->error_count))
1710 return -EFAULT;
1711
1712 if (usb_endpoint_xfer_isoc(&urb->ep->desc)) {
1713 for (i = 0; i < urb->number_of_packets; i++) {
1714 if (put_user(urb->iso_frame_desc[i].actual_length,
1715 &userurb->iso_frame_desc[i].actual_length))
1716 return -EFAULT;
1717 if (put_user(urb->iso_frame_desc[i].status,
1718 &userurb->iso_frame_desc[i].status))
1719 return -EFAULT;
1720 }
1721 }
1722
1723 if (put_user(ptr_to_compat(addr), (u32 __user *)arg))
1724 return -EFAULT;
1725 return 0;
1726 }
1727
1728 static int proc_reapurb_compat(struct dev_state *ps, void __user *arg)
1729 {
1730 struct async *as = reap_as(ps);
1731 if (as) {
1732 int retval = processcompl_compat(as, (void __user * __user *)arg);
1733 free_async(as);
1734 return retval;
1735 }
1736 if (signal_pending(current))
1737 return -EINTR;
1738 return -EIO;
1739 }
1740
1741 static int proc_reapurbnonblock_compat(struct dev_state *ps, void __user *arg)
1742 {
1743 int retval;
1744 struct async *as;
1745
1746 retval = -EAGAIN;
1747 as = async_getcompleted(ps);
1748 if (as) {
1749 retval = processcompl_compat(as, (void __user * __user *)arg);
1750 free_async(as);
1751 }
1752 return retval;
1753 }
1754
1755
1756 #endif
1757
1758 static int proc_disconnectsignal(struct dev_state *ps, void __user *arg)
1759 {
1760 struct usbdevfs_disconnectsignal ds;
1761
1762 if (copy_from_user(&ds, arg, sizeof(ds)))
1763 return -EFAULT;
1764 ps->discsignr = ds.signr;
1765 ps->disccontext = ds.context;
1766 return 0;
1767 }
1768
1769 static int proc_claiminterface(struct dev_state *ps, void __user *arg)
1770 {
1771 unsigned int ifnum;
1772
1773 if (get_user(ifnum, (unsigned int __user *)arg))
1774 return -EFAULT;
1775 return claimintf(ps, ifnum);
1776 }
1777
1778 static int proc_releaseinterface(struct dev_state *ps, void __user *arg)
1779 {
1780 unsigned int ifnum;
1781 int ret;
1782
1783 if (get_user(ifnum, (unsigned int __user *)arg))
1784 return -EFAULT;
1785 if ((ret = releaseintf(ps, ifnum)) < 0)
1786 return ret;
1787 destroy_async_on_interface (ps, ifnum);
1788 return 0;
1789 }
1790
1791 static int proc_ioctl(struct dev_state *ps, struct usbdevfs_ioctl *ctl)
1792 {
1793 int size;
1794 void *buf = NULL;
1795 int retval = 0;
1796 struct usb_interface *intf = NULL;
1797 struct usb_driver *driver = NULL;
1798
1799 /* alloc buffer */
1800 if ((size = _IOC_SIZE(ctl->ioctl_code)) > 0) {
1801 if ((buf = kmalloc(size, GFP_KERNEL)) == NULL)
1802 return -ENOMEM;
1803 if ((_IOC_DIR(ctl->ioctl_code) & _IOC_WRITE)) {
1804 if (copy_from_user(buf, ctl->data, size)) {
1805 kfree(buf);
1806 return -EFAULT;
1807 }
1808 } else {
1809 memset(buf, 0, size);
1810 }
1811 }
1812
1813 if (!connected(ps)) {
1814 kfree(buf);
1815 return -ENODEV;
1816 }
1817
1818 if (ps->dev->state != USB_STATE_CONFIGURED)
1819 retval = -EHOSTUNREACH;
1820 else if (!(intf = usb_ifnum_to_if(ps->dev, ctl->ifno)))
1821 retval = -EINVAL;
1822 else switch (ctl->ioctl_code) {
1823
1824 /* disconnect kernel driver from interface */
1825 case USBDEVFS_DISCONNECT:
1826 if (intf->dev.driver) {
1827 driver = to_usb_driver(intf->dev.driver);
1828 dev_dbg(&intf->dev, "disconnect by usbfs\n");
1829 usb_driver_release_interface(driver, intf);
1830 } else
1831 retval = -ENODATA;
1832 break;
1833
1834 /* let kernel drivers try to (re)bind to the interface */
1835 case USBDEVFS_CONNECT:
1836 if (!intf->dev.driver)
1837 retval = device_attach(&intf->dev);
1838 else
1839 retval = -EBUSY;
1840 break;
1841
1842 /* talk directly to the interface's driver */
1843 default:
1844 if (intf->dev.driver)
1845 driver = to_usb_driver(intf->dev.driver);
1846 if (driver == NULL || driver->unlocked_ioctl == NULL) {
1847 retval = -ENOTTY;
1848 } else {
1849 retval = driver->unlocked_ioctl(intf, ctl->ioctl_code, buf);
1850 if (retval == -ENOIOCTLCMD)
1851 retval = -ENOTTY;
1852 }
1853 }
1854
1855 /* cleanup and return */
1856 if (retval >= 0
1857 && (_IOC_DIR(ctl->ioctl_code) & _IOC_READ) != 0
1858 && size > 0
1859 && copy_to_user(ctl->data, buf, size) != 0)
1860 retval = -EFAULT;
1861
1862 kfree(buf);
1863 return retval;
1864 }
1865
1866 static int proc_ioctl_default(struct dev_state *ps, void __user *arg)
1867 {
1868 struct usbdevfs_ioctl ctrl;
1869
1870 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
1871 return -EFAULT;
1872 return proc_ioctl(ps, &ctrl);
1873 }
1874
1875 #ifdef CONFIG_COMPAT
1876 static int proc_ioctl_compat(struct dev_state *ps, compat_uptr_t arg)
1877 {
1878 struct usbdevfs_ioctl32 __user *uioc;
1879 struct usbdevfs_ioctl ctrl;
1880 u32 udata;
1881
1882 uioc = compat_ptr((long)arg);
1883 if (!access_ok(VERIFY_READ, uioc, sizeof(*uioc)) ||
1884 __get_user(ctrl.ifno, &uioc->ifno) ||
1885 __get_user(ctrl.ioctl_code, &uioc->ioctl_code) ||
1886 __get_user(udata, &uioc->data))
1887 return -EFAULT;
1888 ctrl.data = compat_ptr(udata);
1889
1890 return proc_ioctl(ps, &ctrl);
1891 }
1892 #endif
1893
1894 static int proc_claim_port(struct dev_state *ps, void __user *arg)
1895 {
1896 unsigned portnum;
1897 int rc;
1898
1899 if (get_user(portnum, (unsigned __user *) arg))
1900 return -EFAULT;
1901 rc = usb_hub_claim_port(ps->dev, portnum, ps);
1902 if (rc == 0)
1903 snoop(&ps->dev->dev, "port %d claimed by process %d: %s\n",
1904 portnum, task_pid_nr(current), current->comm);
1905 return rc;
1906 }
1907
1908 static int proc_release_port(struct dev_state *ps, void __user *arg)
1909 {
1910 unsigned portnum;
1911
1912 if (get_user(portnum, (unsigned __user *) arg))
1913 return -EFAULT;
1914 return usb_hub_release_port(ps->dev, portnum, ps);
1915 }
1916
1917 static int proc_get_capabilities(struct dev_state *ps, void __user *arg)
1918 {
1919 __u32 caps;
1920
1921 caps = USBDEVFS_CAP_ZERO_PACKET | USBDEVFS_CAP_NO_PACKET_SIZE_LIM;
1922 if (!ps->dev->bus->no_stop_on_short)
1923 caps |= USBDEVFS_CAP_BULK_CONTINUATION;
1924 if (ps->dev->bus->sg_tablesize)
1925 caps |= USBDEVFS_CAP_BULK_SCATTER_GATHER;
1926
1927 if (put_user(caps, (__u32 __user *)arg))
1928 return -EFAULT;
1929
1930 return 0;
1931 }
1932
1933 static int proc_disconnect_claim(struct dev_state *ps, void __user *arg)
1934 {
1935 struct usbdevfs_disconnect_claim dc;
1936 struct usb_interface *intf;
1937
1938 if (copy_from_user(&dc, arg, sizeof(dc)))
1939 return -EFAULT;
1940
1941 intf = usb_ifnum_to_if(ps->dev, dc.interface);
1942 if (!intf)
1943 return -EINVAL;
1944
1945 if (intf->dev.driver) {
1946 struct usb_driver *driver = to_usb_driver(intf->dev.driver);
1947
1948 if ((dc.flags & USBDEVFS_DISCONNECT_CLAIM_IF_DRIVER) &&
1949 strncmp(dc.driver, intf->dev.driver->name,
1950 sizeof(dc.driver)) != 0)
1951 return -EBUSY;
1952
1953 if ((dc.flags & USBDEVFS_DISCONNECT_CLAIM_EXCEPT_DRIVER) &&
1954 strncmp(dc.driver, intf->dev.driver->name,
1955 sizeof(dc.driver)) == 0)
1956 return -EBUSY;
1957
1958 dev_dbg(&intf->dev, "disconnect by usbfs\n");
1959 usb_driver_release_interface(driver, intf);
1960 }
1961
1962 return claimintf(ps, dc.interface);
1963 }
1964
1965 /*
1966 * NOTE: All requests here that have interface numbers as parameters
1967 * are assuming that somehow the configuration has been prevented from
1968 * changing. But there's no mechanism to ensure that...
1969 */
1970 static long usbdev_do_ioctl(struct file *file, unsigned int cmd,
1971 void __user *p)
1972 {
1973 struct dev_state *ps = file->private_data;
1974 struct inode *inode = file_inode(file);
1975 struct usb_device *dev = ps->dev;
1976 int ret = -ENOTTY;
1977
1978 if (!(file->f_mode & FMODE_WRITE))
1979 return -EPERM;
1980
1981 usb_lock_device(dev);
1982 if (!connected(ps)) {
1983 usb_unlock_device(dev);
1984 return -ENODEV;
1985 }
1986
1987 switch (cmd) {
1988 case USBDEVFS_CONTROL:
1989 snoop(&dev->dev, "%s: CONTROL\n", __func__);
1990 ret = proc_control(ps, p);
1991 if (ret >= 0)
1992 inode->i_mtime = CURRENT_TIME;
1993 break;
1994
1995 case USBDEVFS_BULK:
1996 snoop(&dev->dev, "%s: BULK\n", __func__);
1997 ret = proc_bulk(ps, p);
1998 if (ret >= 0)
1999 inode->i_mtime = CURRENT_TIME;
2000 break;
2001
2002 case USBDEVFS_RESETEP:
2003 snoop(&dev->dev, "%s: RESETEP\n", __func__);
2004 ret = proc_resetep(ps, p);
2005 if (ret >= 0)
2006 inode->i_mtime = CURRENT_TIME;
2007 break;
2008
2009 case USBDEVFS_RESET:
2010 snoop(&dev->dev, "%s: RESET\n", __func__);
2011 ret = proc_resetdevice(ps);
2012 break;
2013
2014 case USBDEVFS_CLEAR_HALT:
2015 snoop(&dev->dev, "%s: CLEAR_HALT\n", __func__);
2016 ret = proc_clearhalt(ps, p);
2017 if (ret >= 0)
2018 inode->i_mtime = CURRENT_TIME;
2019 break;
2020
2021 case USBDEVFS_GETDRIVER:
2022 snoop(&dev->dev, "%s: GETDRIVER\n", __func__);
2023 ret = proc_getdriver(ps, p);
2024 break;
2025
2026 case USBDEVFS_CONNECTINFO:
2027 snoop(&dev->dev, "%s: CONNECTINFO\n", __func__);
2028 ret = proc_connectinfo(ps, p);
2029 break;
2030
2031 case USBDEVFS_SETINTERFACE:
2032 snoop(&dev->dev, "%s: SETINTERFACE\n", __func__);
2033 ret = proc_setintf(ps, p);
2034 break;
2035
2036 case USBDEVFS_SETCONFIGURATION:
2037 snoop(&dev->dev, "%s: SETCONFIGURATION\n", __func__);
2038 ret = proc_setconfig(ps, p);
2039 break;
2040
2041 case USBDEVFS_SUBMITURB:
2042 snoop(&dev->dev, "%s: SUBMITURB\n", __func__);
2043 ret = proc_submiturb(ps, p);
2044 if (ret >= 0)
2045 inode->i_mtime = CURRENT_TIME;
2046 break;
2047
2048 #ifdef CONFIG_COMPAT
2049 case USBDEVFS_CONTROL32:
2050 snoop(&dev->dev, "%s: CONTROL32\n", __func__);
2051 ret = proc_control_compat(ps, p);
2052 if (ret >= 0)
2053 inode->i_mtime = CURRENT_TIME;
2054 break;
2055
2056 case USBDEVFS_BULK32:
2057 snoop(&dev->dev, "%s: BULK32\n", __func__);
2058 ret = proc_bulk_compat(ps, p);
2059 if (ret >= 0)
2060 inode->i_mtime = CURRENT_TIME;
2061 break;
2062
2063 case USBDEVFS_DISCSIGNAL32:
2064 snoop(&dev->dev, "%s: DISCSIGNAL32\n", __func__);
2065 ret = proc_disconnectsignal_compat(ps, p);
2066 break;
2067
2068 case USBDEVFS_SUBMITURB32:
2069 snoop(&dev->dev, "%s: SUBMITURB32\n", __func__);
2070 ret = proc_submiturb_compat(ps, p);
2071 if (ret >= 0)
2072 inode->i_mtime = CURRENT_TIME;
2073 break;
2074
2075 case USBDEVFS_REAPURB32:
2076 snoop(&dev->dev, "%s: REAPURB32\n", __func__);
2077 ret = proc_reapurb_compat(ps, p);
2078 break;
2079
2080 case USBDEVFS_REAPURBNDELAY32:
2081 snoop(&dev->dev, "%s: REAPURBNDELAY32\n", __func__);
2082 ret = proc_reapurbnonblock_compat(ps, p);
2083 break;
2084
2085 case USBDEVFS_IOCTL32:
2086 snoop(&dev->dev, "%s: IOCTL32\n", __func__);
2087 ret = proc_ioctl_compat(ps, ptr_to_compat(p));
2088 break;
2089 #endif
2090
2091 case USBDEVFS_DISCARDURB:
2092 snoop(&dev->dev, "%s: DISCARDURB\n", __func__);
2093 ret = proc_unlinkurb(ps, p);
2094 break;
2095
2096 case USBDEVFS_REAPURB:
2097 snoop(&dev->dev, "%s: REAPURB\n", __func__);
2098 ret = proc_reapurb(ps, p);
2099 break;
2100
2101 case USBDEVFS_REAPURBNDELAY:
2102 snoop(&dev->dev, "%s: REAPURBNDELAY\n", __func__);
2103 ret = proc_reapurbnonblock(ps, p);
2104 break;
2105
2106 case USBDEVFS_DISCSIGNAL:
2107 snoop(&dev->dev, "%s: DISCSIGNAL\n", __func__);
2108 ret = proc_disconnectsignal(ps, p);
2109 break;
2110
2111 case USBDEVFS_CLAIMINTERFACE:
2112 snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __func__);
2113 ret = proc_claiminterface(ps, p);
2114 break;
2115
2116 case USBDEVFS_RELEASEINTERFACE:
2117 snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __func__);
2118 ret = proc_releaseinterface(ps, p);
2119 break;
2120
2121 case USBDEVFS_IOCTL:
2122 snoop(&dev->dev, "%s: IOCTL\n", __func__);
2123 ret = proc_ioctl_default(ps, p);
2124 break;
2125
2126 case USBDEVFS_CLAIM_PORT:
2127 snoop(&dev->dev, "%s: CLAIM_PORT\n", __func__);
2128 ret = proc_claim_port(ps, p);
2129 break;
2130
2131 case USBDEVFS_RELEASE_PORT:
2132 snoop(&dev->dev, "%s: RELEASE_PORT\n", __func__);
2133 ret = proc_release_port(ps, p);
2134 break;
2135 case USBDEVFS_GET_CAPABILITIES:
2136 ret = proc_get_capabilities(ps, p);
2137 break;
2138 case USBDEVFS_DISCONNECT_CLAIM:
2139 ret = proc_disconnect_claim(ps, p);
2140 break;
2141 }
2142 usb_unlock_device(dev);
2143 if (ret >= 0)
2144 inode->i_atime = CURRENT_TIME;
2145 return ret;
2146 }
2147
2148 static long usbdev_ioctl(struct file *file, unsigned int cmd,
2149 unsigned long arg)
2150 {
2151 int ret;
2152
2153 ret = usbdev_do_ioctl(file, cmd, (void __user *)arg);
2154
2155 return ret;
2156 }
2157
2158 #ifdef CONFIG_COMPAT
2159 static long usbdev_compat_ioctl(struct file *file, unsigned int cmd,
2160 unsigned long arg)
2161 {
2162 int ret;
2163
2164 ret = usbdev_do_ioctl(file, cmd, compat_ptr(arg));
2165
2166 return ret;
2167 }
2168 #endif
2169
2170 /* No kernel lock - fine */
2171 static unsigned int usbdev_poll(struct file *file,
2172 struct poll_table_struct *wait)
2173 {
2174 struct dev_state *ps = file->private_data;
2175 unsigned int mask = 0;
2176
2177 poll_wait(file, &ps->wait, wait);
2178 if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed))
2179 mask |= POLLOUT | POLLWRNORM;
2180 if (!connected(ps))
2181 mask |= POLLERR | POLLHUP;
2182 return mask;
2183 }
2184
2185 const struct file_operations usbdev_file_operations = {
2186 .owner = THIS_MODULE,
2187 .llseek = usbdev_lseek,
2188 .read = usbdev_read,
2189 .poll = usbdev_poll,
2190 .unlocked_ioctl = usbdev_ioctl,
2191 #ifdef CONFIG_COMPAT
2192 .compat_ioctl = usbdev_compat_ioctl,
2193 #endif
2194 .open = usbdev_open,
2195 .release = usbdev_release,
2196 };
2197
2198 static void usbdev_remove(struct usb_device *udev)
2199 {
2200 struct dev_state *ps;
2201 struct siginfo sinfo;
2202
2203 while (!list_empty(&udev->filelist)) {
2204 ps = list_entry(udev->filelist.next, struct dev_state, list);
2205 destroy_all_async(ps);
2206 wake_up_all(&ps->wait);
2207 list_del_init(&ps->list);
2208 if (ps->discsignr) {
2209 sinfo.si_signo = ps->discsignr;
2210 sinfo.si_errno = EPIPE;
2211 sinfo.si_code = SI_ASYNCIO;
2212 sinfo.si_addr = ps->disccontext;
2213 kill_pid_info_as_cred(ps->discsignr, &sinfo,
2214 ps->disc_pid, ps->cred, ps->secid);
2215 }
2216 }
2217 }
2218
2219 static int usbdev_notify(struct notifier_block *self,
2220 unsigned long action, void *dev)
2221 {
2222 switch (action) {
2223 case USB_DEVICE_ADD:
2224 break;
2225 case USB_DEVICE_REMOVE:
2226 usbdev_remove(dev);
2227 break;
2228 }
2229 return NOTIFY_OK;
2230 }
2231
2232 static struct notifier_block usbdev_nb = {
2233 .notifier_call = usbdev_notify,
2234 };
2235
2236 static struct cdev usb_device_cdev;
2237
2238 int __init usb_devio_init(void)
2239 {
2240 int retval;
2241
2242 retval = register_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX,
2243 "usb_device");
2244 if (retval) {
2245 printk(KERN_ERR "Unable to register minors for usb_device\n");
2246 goto out;
2247 }
2248 cdev_init(&usb_device_cdev, &usbdev_file_operations);
2249 retval = cdev_add(&usb_device_cdev, USB_DEVICE_DEV, USB_DEVICE_MAX);
2250 if (retval) {
2251 printk(KERN_ERR "Unable to get usb_device major %d\n",
2252 USB_DEVICE_MAJOR);
2253 goto error_cdev;
2254 }
2255 usb_register_notify(&usbdev_nb);
2256 out:
2257 return retval;
2258
2259 error_cdev:
2260 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
2261 goto out;
2262 }
2263
2264 void usb_devio_cleanup(void)
2265 {
2266 usb_unregister_notify(&usbdev_nb);
2267 cdev_del(&usb_device_cdev);
2268 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
2269 }
CJK support for tty framebuffer vt