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24#include <linux/fs.h>
25#include <linux/mm.h>
26#include <linux/sched/signal.h>
27#include <linux/slab.h>
28#include <linux/signal.h>
29#include <linux/poll.h>
30#include <linux/module.h>
31#include <linux/string.h>
32#include <linux/usb.h>
33#include <linux/usbdevice_fs.h>
34#include <linux/usb/hcd.h>
35#include <linux/cdev.h>
36#include <linux/notifier.h>
37#include <linux/security.h>
38#include <linux/user_namespace.h>
39#include <linux/scatterlist.h>
40#include <linux/uaccess.h>
41#include <linux/dma-mapping.h>
42#include <asm/byteorder.h>
43#include <linux/moduleparam.h>
44
45#include "usb.h"
46
47#define USB_MAXBUS 64
48#define USB_DEVICE_MAX (USB_MAXBUS * 128)
49#define USB_SG_SIZE 16384
50
51struct usb_dev_state {
52 struct list_head list;
53 struct usb_device *dev;
54 struct file *file;
55 spinlock_t lock;
56 struct list_head async_pending;
57 struct list_head async_completed;
58 struct list_head memory_list;
59 wait_queue_head_t wait;
60 unsigned int discsignr;
61 struct pid *disc_pid;
62 const struct cred *cred;
63 sigval_t disccontext;
64 unsigned long ifclaimed;
65 u32 disabled_bulk_eps;
66 bool privileges_dropped;
67 unsigned long interface_allowed_mask;
68};
69
70struct usb_memory {
71 struct list_head memlist;
72 int vma_use_count;
73 int urb_use_count;
74 u32 size;
75 void *mem;
76 dma_addr_t dma_handle;
77 unsigned long vm_start;
78 struct usb_dev_state *ps;
79};
80
81struct async {
82 struct list_head asynclist;
83 struct usb_dev_state *ps;
84 struct pid *pid;
85 const struct cred *cred;
86 unsigned int signr;
87 unsigned int ifnum;
88 void __user *userbuffer;
89 void __user *userurb;
90 sigval_t userurb_sigval;
91 struct urb *urb;
92 struct usb_memory *usbm;
93 unsigned int mem_usage;
94 int status;
95 u8 bulk_addr;
96 u8 bulk_status;
97};
98
99static bool usbfs_snoop;
100module_param(usbfs_snoop, bool, S_IRUGO | S_IWUSR);
101MODULE_PARM_DESC(usbfs_snoop, "true to log all usbfs traffic");
102
103static unsigned usbfs_snoop_max = 65536;
104module_param(usbfs_snoop_max, uint, S_IRUGO | S_IWUSR);
105MODULE_PARM_DESC(usbfs_snoop_max,
106 "maximum number of bytes to print while snooping");
107
108#define snoop(dev, format, arg...) \
109 do { \
110 if (usbfs_snoop) \
111 dev_info(dev, format, ## arg); \
112 } while (0)
113
114enum snoop_when {
115 SUBMIT, COMPLETE
116};
117
118#define USB_DEVICE_DEV MKDEV(USB_DEVICE_MAJOR, 0)
119
120
121static u32 usbfs_memory_mb = 16;
122module_param(usbfs_memory_mb, uint, 0644);
123MODULE_PARM_DESC(usbfs_memory_mb,
124 "maximum MB allowed for usbfs buffers (0 = no limit)");
125
126
127#define USBFS_XFER_MAX (UINT_MAX / 2 - 1000000)
128
129static atomic64_t usbfs_memory_usage;
130
131
132static int usbfs_increase_memory_usage(u64 amount)
133{
134 u64 lim;
135
136 lim = READ_ONCE(usbfs_memory_mb);
137 lim <<= 20;
138
139 atomic64_add(amount, &usbfs_memory_usage);
140
141 if (lim > 0 && atomic64_read(&usbfs_memory_usage) > lim) {
142 atomic64_sub(amount, &usbfs_memory_usage);
143 return -ENOMEM;
144 }
145
146 return 0;
147}
148
149
150static void usbfs_decrease_memory_usage(u64 amount)
151{
152 atomic64_sub(amount, &usbfs_memory_usage);
153}
154
155static int connected(struct usb_dev_state *ps)
156{
157 return (!list_empty(&ps->list) &&
158 ps->dev->state != USB_STATE_NOTATTACHED);
159}
160
161static void dec_usb_memory_use_count(struct usb_memory *usbm, int *count)
162{
163 struct usb_dev_state *ps = usbm->ps;
164 unsigned long flags;
165
166 spin_lock_irqsave(&ps->lock, flags);
167 --*count;
168 if (usbm->urb_use_count == 0 && usbm->vma_use_count == 0) {
169 list_del(&usbm->memlist);
170 spin_unlock_irqrestore(&ps->lock, flags);
171
172 usb_free_coherent(ps->dev, usbm->size, usbm->mem,
173 usbm->dma_handle);
174 usbfs_decrease_memory_usage(
175 usbm->size + sizeof(struct usb_memory));
176 kfree(usbm);
177 } else {
178 spin_unlock_irqrestore(&ps->lock, flags);
179 }
180}
181
182static void usbdev_vm_open(struct vm_area_struct *vma)
183{
184 struct usb_memory *usbm = vma->vm_private_data;
185 unsigned long flags;
186
187 spin_lock_irqsave(&usbm->ps->lock, flags);
188 ++usbm->vma_use_count;
189 spin_unlock_irqrestore(&usbm->ps->lock, flags);
190}
191
192static void usbdev_vm_close(struct vm_area_struct *vma)
193{
194 struct usb_memory *usbm = vma->vm_private_data;
195
196 dec_usb_memory_use_count(usbm, &usbm->vma_use_count);
197}
198
199static const struct vm_operations_struct usbdev_vm_ops = {
200 .open = usbdev_vm_open,
201 .close = usbdev_vm_close
202};
203
204static int usbdev_mmap(struct file *file, struct vm_area_struct *vma)
205{
206 struct usb_memory *usbm = NULL;
207 struct usb_dev_state *ps = file->private_data;
208 size_t size = vma->vm_end - vma->vm_start;
209 void *mem;
210 unsigned long flags;
211 dma_addr_t dma_handle;
212 int ret;
213
214 ret = usbfs_increase_memory_usage(size + sizeof(struct usb_memory));
215 if (ret)
216 goto error;
217
218 usbm = kzalloc(sizeof(struct usb_memory), GFP_KERNEL);
219 if (!usbm) {
220 ret = -ENOMEM;
221 goto error_decrease_mem;
222 }
223
224 mem = usb_alloc_coherent(ps->dev, size, GFP_USER | __GFP_NOWARN,
225 &dma_handle);
226 if (!mem) {
227 ret = -ENOMEM;
228 goto error_free_usbm;
229 }
230
231 memset(mem, 0, size);
232
233 usbm->mem = mem;
234 usbm->dma_handle = dma_handle;
235 usbm->size = size;
236 usbm->ps = ps;
237 usbm->vm_start = vma->vm_start;
238 usbm->vma_use_count = 1;
239 INIT_LIST_HEAD(&usbm->memlist);
240
241 if (remap_pfn_range(vma, vma->vm_start,
242 virt_to_phys(usbm->mem) >> PAGE_SHIFT,
243 size, vma->vm_page_prot) < 0) {
244 dec_usb_memory_use_count(usbm, &usbm->vma_use_count);
245 return -EAGAIN;
246 }
247
248 vma->vm_flags |= VM_IO;
249 vma->vm_flags |= (VM_DONTEXPAND | VM_DONTDUMP);
250 vma->vm_ops = &usbdev_vm_ops;
251 vma->vm_private_data = usbm;
252
253 spin_lock_irqsave(&ps->lock, flags);
254 list_add_tail(&usbm->memlist, &ps->memory_list);
255 spin_unlock_irqrestore(&ps->lock, flags);
256
257 return 0;
258
259error_free_usbm:
260 kfree(usbm);
261error_decrease_mem:
262 usbfs_decrease_memory_usage(size + sizeof(struct usb_memory));
263error:
264 return ret;
265}
266
267static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes,
268 loff_t *ppos)
269{
270 struct usb_dev_state *ps = file->private_data;
271 struct usb_device *dev = ps->dev;
272 ssize_t ret = 0;
273 unsigned len;
274 loff_t pos;
275 int i;
276
277 pos = *ppos;
278 usb_lock_device(dev);
279 if (!connected(ps)) {
280 ret = -ENODEV;
281 goto err;
282 } else if (pos < 0) {
283 ret = -EINVAL;
284 goto err;
285 }
286
287 if (pos < sizeof(struct usb_device_descriptor)) {
288
289 struct usb_device_descriptor temp_desc;
290
291 memcpy(&temp_desc, &dev->descriptor, sizeof(dev->descriptor));
292 le16_to_cpus(&temp_desc.bcdUSB);
293 le16_to_cpus(&temp_desc.idVendor);
294 le16_to_cpus(&temp_desc.idProduct);
295 le16_to_cpus(&temp_desc.bcdDevice);
296
297 len = sizeof(struct usb_device_descriptor) - pos;
298 if (len > nbytes)
299 len = nbytes;
300 if (copy_to_user(buf, ((char *)&temp_desc) + pos, len)) {
301 ret = -EFAULT;
302 goto err;
303 }
304
305 *ppos += len;
306 buf += len;
307 nbytes -= len;
308 ret += len;
309 }
310
311 pos = sizeof(struct usb_device_descriptor);
312 for (i = 0; nbytes && i < dev->descriptor.bNumConfigurations; i++) {
313 struct usb_config_descriptor *config =
314 (struct usb_config_descriptor *)dev->rawdescriptors[i];
315 unsigned int length = le16_to_cpu(config->wTotalLength);
316
317 if (*ppos < pos + length) {
318
319
320
321 unsigned alloclen =
322 le16_to_cpu(dev->config[i].desc.wTotalLength);
323
324 len = length - (*ppos - pos);
325 if (len > nbytes)
326 len = nbytes;
327
328
329 if (alloclen > (*ppos - pos)) {
330 alloclen -= (*ppos - pos);
331 if (copy_to_user(buf,
332 dev->rawdescriptors[i] + (*ppos - pos),
333 min(len, alloclen))) {
334 ret = -EFAULT;
335 goto err;
336 }
337 }
338
339 *ppos += len;
340 buf += len;
341 nbytes -= len;
342 ret += len;
343 }
344
345 pos += length;
346 }
347
348err:
349 usb_unlock_device(dev);
350 return ret;
351}
352
353
354
355
356
357static struct async *alloc_async(unsigned int numisoframes)
358{
359 struct async *as;
360
361 as = kzalloc(sizeof(struct async), GFP_KERNEL);
362 if (!as)
363 return NULL;
364 as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL);
365 if (!as->urb) {
366 kfree(as);
367 return NULL;
368 }
369 return as;
370}
371
372static void free_async(struct async *as)
373{
374 int i;
375
376 put_pid(as->pid);
377 if (as->cred)
378 put_cred(as->cred);
379 for (i = 0; i < as->urb->num_sgs; i++) {
380 if (sg_page(&as->urb->sg[i]))
381 kfree(sg_virt(&as->urb->sg[i]));
382 }
383
384 kfree(as->urb->sg);
385 if (as->usbm == NULL)
386 kfree(as->urb->transfer_buffer);
387 else
388 dec_usb_memory_use_count(as->usbm, &as->usbm->urb_use_count);
389
390 kfree(as->urb->setup_packet);
391 usb_free_urb(as->urb);
392 usbfs_decrease_memory_usage(as->mem_usage);
393 kfree(as);
394}
395
396static void async_newpending(struct async *as)
397{
398 struct usb_dev_state *ps = as->ps;
399 unsigned long flags;
400
401 spin_lock_irqsave(&ps->lock, flags);
402 list_add_tail(&as->asynclist, &ps->async_pending);
403 spin_unlock_irqrestore(&ps->lock, flags);
404}
405
406static void async_removepending(struct async *as)
407{
408 struct usb_dev_state *ps = as->ps;
409 unsigned long flags;
410
411 spin_lock_irqsave(&ps->lock, flags);
412 list_del_init(&as->asynclist);
413 spin_unlock_irqrestore(&ps->lock, flags);
414}
415
416static struct async *async_getcompleted(struct usb_dev_state *ps)
417{
418 unsigned long flags;
419 struct async *as = NULL;
420
421 spin_lock_irqsave(&ps->lock, flags);
422 if (!list_empty(&ps->async_completed)) {
423 as = list_entry(ps->async_completed.next, struct async,
424 asynclist);
425 list_del_init(&as->asynclist);
426 }
427 spin_unlock_irqrestore(&ps->lock, flags);
428 return as;
429}
430
431static struct async *async_getpending(struct usb_dev_state *ps,
432 void __user *userurb)
433{
434 struct async *as;
435
436 list_for_each_entry(as, &ps->async_pending, asynclist)
437 if (as->userurb == userurb) {
438 list_del_init(&as->asynclist);
439 return as;
440 }
441
442 return NULL;
443}
444
445static void snoop_urb(struct usb_device *udev,
446 void __user *userurb, int pipe, unsigned length,
447 int timeout_or_status, enum snoop_when when,
448 unsigned char *data, unsigned data_len)
449{
450 static const char *types[] = {"isoc", "int", "ctrl", "bulk"};
451 static const char *dirs[] = {"out", "in"};
452 int ep;
453 const char *t, *d;
454
455 if (!usbfs_snoop)
456 return;
457
458 ep = usb_pipeendpoint(pipe);
459 t = types[usb_pipetype(pipe)];
460 d = dirs[!!usb_pipein(pipe)];
461
462 if (userurb) {
463 if (when == SUBMIT)
464 dev_info(&udev->dev, "userurb %pK, ep%d %s-%s, "
465 "length %u\n",
466 userurb, ep, t, d, length);
467 else
468 dev_info(&udev->dev, "userurb %pK, ep%d %s-%s, "
469 "actual_length %u status %d\n",
470 userurb, ep, t, d, length,
471 timeout_or_status);
472 } else {
473 if (when == SUBMIT)
474 dev_info(&udev->dev, "ep%d %s-%s, length %u, "
475 "timeout %d\n",
476 ep, t, d, length, timeout_or_status);
477 else
478 dev_info(&udev->dev, "ep%d %s-%s, actual_length %u, "
479 "status %d\n",
480 ep, t, d, length, timeout_or_status);
481 }
482
483 data_len = min(data_len, usbfs_snoop_max);
484 if (data && data_len > 0) {
485 print_hex_dump(KERN_DEBUG, "data: ", DUMP_PREFIX_NONE, 32, 1,
486 data, data_len, 1);
487 }
488}
489
490static void snoop_urb_data(struct urb *urb, unsigned len)
491{
492 int i, size;
493
494 len = min(len, usbfs_snoop_max);
495 if (!usbfs_snoop || len == 0)
496 return;
497
498 if (urb->num_sgs == 0) {
499 print_hex_dump(KERN_DEBUG, "data: ", DUMP_PREFIX_NONE, 32, 1,
500 urb->transfer_buffer, len, 1);
501 return;
502 }
503
504 for (i = 0; i < urb->num_sgs && len; i++) {
505 size = (len > USB_SG_SIZE) ? USB_SG_SIZE : len;
506 print_hex_dump(KERN_DEBUG, "data: ", DUMP_PREFIX_NONE, 32, 1,
507 sg_virt(&urb->sg[i]), size, 1);
508 len -= size;
509 }
510}
511
512static int copy_urb_data_to_user(u8 __user *userbuffer, struct urb *urb)
513{
514 unsigned i, len, size;
515
516 if (urb->number_of_packets > 0)
517 len = urb->transfer_buffer_length;
518 else
519 len = urb->actual_length;
520
521 if (urb->num_sgs == 0) {
522 if (copy_to_user(userbuffer, urb->transfer_buffer, len))
523 return -EFAULT;
524 return 0;
525 }
526
527 for (i = 0; i < urb->num_sgs && len; i++) {
528 size = (len > USB_SG_SIZE) ? USB_SG_SIZE : len;
529 if (copy_to_user(userbuffer, sg_virt(&urb->sg[i]), size))
530 return -EFAULT;
531 userbuffer += size;
532 len -= size;
533 }
534
535 return 0;
536}
537
538#define AS_CONTINUATION 1
539#define AS_UNLINK 2
540
541static void cancel_bulk_urbs(struct usb_dev_state *ps, unsigned bulk_addr)
542__releases(ps->lock)
543__acquires(ps->lock)
544{
545 struct urb *urb;
546 struct async *as;
547
548
549
550
551
552
553 list_for_each_entry(as, &ps->async_pending, asynclist) {
554 if (as->bulk_addr == bulk_addr) {
555 if (as->bulk_status != AS_CONTINUATION)
556 goto rescan;
557 as->bulk_status = AS_UNLINK;
558 as->bulk_addr = 0;
559 }
560 }
561 ps->disabled_bulk_eps |= (1 << bulk_addr);
562
563
564 rescan:
565 list_for_each_entry(as, &ps->async_pending, asynclist) {
566 if (as->bulk_status == AS_UNLINK) {
567 as->bulk_status = 0;
568 urb = as->urb;
569 usb_get_urb(urb);
570 spin_unlock(&ps->lock);
571 usb_unlink_urb(urb);
572 usb_put_urb(urb);
573 spin_lock(&ps->lock);
574 goto rescan;
575 }
576 }
577}
578
579static void async_completed(struct urb *urb)
580{
581 struct async *as = urb->context;
582 struct usb_dev_state *ps = as->ps;
583 struct pid *pid = NULL;
584 const struct cred *cred = NULL;
585 unsigned long flags;
586 sigval_t addr;
587 int signr, errno;
588
589 spin_lock_irqsave(&ps->lock, flags);
590 list_move_tail(&as->asynclist, &ps->async_completed);
591 as->status = urb->status;
592 signr = as->signr;
593 if (signr) {
594 errno = as->status;
595 addr = as->userurb_sigval;
596 pid = get_pid(as->pid);
597 cred = get_cred(as->cred);
598 }
599 snoop(&urb->dev->dev, "urb complete\n");
600 snoop_urb(urb->dev, as->userurb, urb->pipe, urb->actual_length,
601 as->status, COMPLETE, NULL, 0);
602 if (usb_urb_dir_in(urb))
603 snoop_urb_data(urb, urb->actual_length);
604
605 if (as->status < 0 && as->bulk_addr && as->status != -ECONNRESET &&
606 as->status != -ENOENT)
607 cancel_bulk_urbs(ps, as->bulk_addr);
608
609 wake_up(&ps->wait);
610 spin_unlock_irqrestore(&ps->lock, flags);
611
612 if (signr) {
613 kill_pid_usb_asyncio(signr, errno, addr, pid, cred);
614 put_pid(pid);
615 put_cred(cred);
616 }
617}
618
619static void destroy_async(struct usb_dev_state *ps, struct list_head *list)
620{
621 struct urb *urb;
622 struct async *as;
623 unsigned long flags;
624
625 spin_lock_irqsave(&ps->lock, flags);
626 while (!list_empty(list)) {
627 as = list_entry(list->next, struct async, asynclist);
628 list_del_init(&as->asynclist);
629 urb = as->urb;
630 usb_get_urb(urb);
631
632
633 spin_unlock_irqrestore(&ps->lock, flags);
634 usb_kill_urb(urb);
635 usb_put_urb(urb);
636 spin_lock_irqsave(&ps->lock, flags);
637 }
638 spin_unlock_irqrestore(&ps->lock, flags);
639}
640
641static void destroy_async_on_interface(struct usb_dev_state *ps,
642 unsigned int ifnum)
643{
644 struct list_head *p, *q, hitlist;
645 unsigned long flags;
646
647 INIT_LIST_HEAD(&hitlist);
648 spin_lock_irqsave(&ps->lock, flags);
649 list_for_each_safe(p, q, &ps->async_pending)
650 if (ifnum == list_entry(p, struct async, asynclist)->ifnum)
651 list_move_tail(p, &hitlist);
652 spin_unlock_irqrestore(&ps->lock, flags);
653 destroy_async(ps, &hitlist);
654}
655
656static void destroy_all_async(struct usb_dev_state *ps)
657{
658 destroy_async(ps, &ps->async_pending);
659}
660
661
662
663
664
665
666
667static int driver_probe(struct usb_interface *intf,
668 const struct usb_device_id *id)
669{
670 return -ENODEV;
671}
672
673static void driver_disconnect(struct usb_interface *intf)
674{
675 struct usb_dev_state *ps = usb_get_intfdata(intf);
676 unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber;
677
678 if (!ps)
679 return;
680
681
682
683
684
685 if (likely(ifnum < 8*sizeof(ps->ifclaimed)))
686 clear_bit(ifnum, &ps->ifclaimed);
687 else
688 dev_warn(&intf->dev, "interface number %u out of range\n",
689 ifnum);
690
691 usb_set_intfdata(intf, NULL);
692
693
694 destroy_async_on_interface(ps, ifnum);
695}
696
697
698
699
700static int driver_suspend(struct usb_interface *intf, pm_message_t msg)
701{
702 return 0;
703}
704
705static int driver_resume(struct usb_interface *intf)
706{
707 return 0;
708}
709
710struct usb_driver usbfs_driver = {
711 .name = "usbfs",
712 .probe = driver_probe,
713 .disconnect = driver_disconnect,
714 .suspend = driver_suspend,
715 .resume = driver_resume,
716};
717
718static int claimintf(struct usb_dev_state *ps, unsigned int ifnum)
719{
720 struct usb_device *dev = ps->dev;
721 struct usb_interface *intf;
722 int err;
723
724 if (ifnum >= 8*sizeof(ps->ifclaimed))
725 return -EINVAL;
726
727 if (test_bit(ifnum, &ps->ifclaimed))
728 return 0;
729
730 if (ps->privileges_dropped &&
731 !test_bit(ifnum, &ps->interface_allowed_mask))
732 return -EACCES;
733
734 intf = usb_ifnum_to_if(dev, ifnum);
735 if (!intf)
736 err = -ENOENT;
737 else
738 err = usb_driver_claim_interface(&usbfs_driver, intf, ps);
739 if (err == 0)
740 set_bit(ifnum, &ps->ifclaimed);
741 return err;
742}
743
744static int releaseintf(struct usb_dev_state *ps, unsigned int ifnum)
745{
746 struct usb_device *dev;
747 struct usb_interface *intf;
748 int err;
749
750 err = -EINVAL;
751 if (ifnum >= 8*sizeof(ps->ifclaimed))
752 return err;
753 dev = ps->dev;
754 intf = usb_ifnum_to_if(dev, ifnum);
755 if (!intf)
756 err = -ENOENT;
757 else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) {
758 usb_driver_release_interface(&usbfs_driver, intf);
759 err = 0;
760 }
761 return err;
762}
763
764static int checkintf(struct usb_dev_state *ps, unsigned int ifnum)
765{
766 if (ps->dev->state != USB_STATE_CONFIGURED)
767 return -EHOSTUNREACH;
768 if (ifnum >= 8*sizeof(ps->ifclaimed))
769 return -EINVAL;
770 if (test_bit(ifnum, &ps->ifclaimed))
771 return 0;
772
773 dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim "
774 "interface %u before use\n", task_pid_nr(current),
775 current->comm, ifnum);
776 return claimintf(ps, ifnum);
777}
778
779static int findintfep(struct usb_device *dev, unsigned int ep)
780{
781 unsigned int i, j, e;
782 struct usb_interface *intf;
783 struct usb_host_interface *alts;
784 struct usb_endpoint_descriptor *endpt;
785
786 if (ep & ~(USB_DIR_IN|0xf))
787 return -EINVAL;
788 if (!dev->actconfig)
789 return -ESRCH;
790 for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) {
791 intf = dev->actconfig->interface[i];
792 for (j = 0; j < intf->num_altsetting; j++) {
793 alts = &intf->altsetting[j];
794 for (e = 0; e < alts->desc.bNumEndpoints; e++) {
795 endpt = &alts->endpoint[e].desc;
796 if (endpt->bEndpointAddress == ep)
797 return alts->desc.bInterfaceNumber;
798 }
799 }
800 }
801 return -ENOENT;
802}
803
804static int check_ctrlrecip(struct usb_dev_state *ps, unsigned int requesttype,
805 unsigned int request, unsigned int index)
806{
807 int ret = 0;
808 struct usb_host_interface *alt_setting;
809
810 if (ps->dev->state != USB_STATE_UNAUTHENTICATED
811 && ps->dev->state != USB_STATE_ADDRESS
812 && ps->dev->state != USB_STATE_CONFIGURED)
813 return -EHOSTUNREACH;
814 if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype))
815 return 0;
816
817
818
819
820
821
822 if (requesttype == 0xa1 && request == 0) {
823 alt_setting = usb_find_alt_setting(ps->dev->actconfig,
824 index >> 8, index & 0xff);
825 if (alt_setting
826 && alt_setting->desc.bInterfaceClass == USB_CLASS_PRINTER)
827 return 0;
828 }
829
830 index &= 0xff;
831 switch (requesttype & USB_RECIP_MASK) {
832 case USB_RECIP_ENDPOINT:
833 if ((index & ~USB_DIR_IN) == 0)
834 return 0;
835 ret = findintfep(ps->dev, index);
836 if (ret < 0) {
837
838
839
840
841
842
843
844
845 ret = findintfep(ps->dev, index ^ 0x80);
846 if (ret >= 0)
847 dev_info(&ps->dev->dev,
848 "%s: process %i (%s) requesting ep %02x but needs %02x\n",
849 __func__, task_pid_nr(current),
850 current->comm, index, index ^ 0x80);
851 }
852 if (ret >= 0)
853 ret = checkintf(ps, ret);
854 break;
855
856 case USB_RECIP_INTERFACE:
857 ret = checkintf(ps, index);
858 break;
859 }
860 return ret;
861}
862
863static struct usb_host_endpoint *ep_to_host_endpoint(struct usb_device *dev,
864 unsigned char ep)
865{
866 if (ep & USB_ENDPOINT_DIR_MASK)
867 return dev->ep_in[ep & USB_ENDPOINT_NUMBER_MASK];
868 else
869 return dev->ep_out[ep & USB_ENDPOINT_NUMBER_MASK];
870}
871
872static int parse_usbdevfs_streams(struct usb_dev_state *ps,
873 struct usbdevfs_streams __user *streams,
874 unsigned int *num_streams_ret,
875 unsigned int *num_eps_ret,
876 struct usb_host_endpoint ***eps_ret,
877 struct usb_interface **intf_ret)
878{
879 unsigned int i, num_streams, num_eps;
880 struct usb_host_endpoint **eps;
881 struct usb_interface *intf = NULL;
882 unsigned char ep;
883 int ifnum, ret;
884
885 if (get_user(num_streams, &streams->num_streams) ||
886 get_user(num_eps, &streams->num_eps))
887 return -EFAULT;
888
889 if (num_eps < 1 || num_eps > USB_MAXENDPOINTS)
890 return -EINVAL;
891
892
893 if (num_streams_ret && (num_streams < 2 || num_streams > 65536))
894 return -EINVAL;
895
896 eps = kmalloc_array(num_eps, sizeof(*eps), GFP_KERNEL);
897 if (!eps)
898 return -ENOMEM;
899
900 for (i = 0; i < num_eps; i++) {
901 if (get_user(ep, &streams->eps[i])) {
902 ret = -EFAULT;
903 goto error;
904 }
905 eps[i] = ep_to_host_endpoint(ps->dev, ep);
906 if (!eps[i]) {
907 ret = -EINVAL;
908 goto error;
909 }
910
911
912 ifnum = findintfep(ps->dev, ep);
913 if (ifnum < 0) {
914 ret = ifnum;
915 goto error;
916 }
917
918 if (i == 0) {
919 ret = checkintf(ps, ifnum);
920 if (ret < 0)
921 goto error;
922 intf = usb_ifnum_to_if(ps->dev, ifnum);
923 } else {
924
925 if (ifnum != intf->altsetting->desc.bInterfaceNumber) {
926 ret = -EINVAL;
927 goto error;
928 }
929 }
930 }
931
932 if (num_streams_ret)
933 *num_streams_ret = num_streams;
934 *num_eps_ret = num_eps;
935 *eps_ret = eps;
936 *intf_ret = intf;
937
938 return 0;
939
940error:
941 kfree(eps);
942 return ret;
943}
944
945static int match_devt(struct device *dev, const void *data)
946{
947 return dev->devt == (dev_t)(unsigned long)(void *)data;
948}
949
950static struct usb_device *usbdev_lookup_by_devt(dev_t devt)
951{
952 struct device *dev;
953
954 dev = bus_find_device(&usb_bus_type, NULL,
955 (void *) (unsigned long) devt, match_devt);
956 if (!dev)
957 return NULL;
958 return to_usb_device(dev);
959}
960
961
962
963
964static int usbdev_open(struct inode *inode, struct file *file)
965{
966 struct usb_device *dev = NULL;
967 struct usb_dev_state *ps;
968 int ret;
969
970 ret = -ENOMEM;
971 ps = kzalloc(sizeof(struct usb_dev_state), GFP_KERNEL);
972 if (!ps)
973 goto out_free_ps;
974
975 ret = -ENODEV;
976
977
978 if (imajor(inode) == USB_DEVICE_MAJOR)
979 dev = usbdev_lookup_by_devt(inode->i_rdev);
980 if (!dev)
981 goto out_free_ps;
982
983 usb_lock_device(dev);
984 if (dev->state == USB_STATE_NOTATTACHED)
985 goto out_unlock_device;
986
987 ret = usb_autoresume_device(dev);
988 if (ret)
989 goto out_unlock_device;
990
991 ps->dev = dev;
992 ps->file = file;
993 ps->interface_allowed_mask = 0xFFFFFFFF;
994 spin_lock_init(&ps->lock);
995 INIT_LIST_HEAD(&ps->list);
996 INIT_LIST_HEAD(&ps->async_pending);
997 INIT_LIST_HEAD(&ps->async_completed);
998 INIT_LIST_HEAD(&ps->memory_list);
999 init_waitqueue_head(&ps->wait);
1000 ps->disc_pid = get_pid(task_pid(current));
1001 ps->cred = get_current_cred();
1002 smp_wmb();
1003 list_add_tail(&ps->list, &dev->filelist);
1004 file->private_data = ps;
1005 usb_unlock_device(dev);
1006 snoop(&dev->dev, "opened by process %d: %s\n", task_pid_nr(current),
1007 current->comm);
1008 return ret;
1009
1010 out_unlock_device:
1011 usb_unlock_device(dev);
1012 usb_put_dev(dev);
1013 out_free_ps:
1014 kfree(ps);
1015 return ret;
1016}
1017
1018static int usbdev_release(struct inode *inode, struct file *file)
1019{
1020 struct usb_dev_state *ps = file->private_data;
1021 struct usb_device *dev = ps->dev;
1022 unsigned int ifnum;
1023 struct async *as;
1024
1025 usb_lock_device(dev);
1026 usb_hub_release_all_ports(dev, ps);
1027
1028 list_del_init(&ps->list);
1029
1030 for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed);
1031 ifnum++) {
1032 if (test_bit(ifnum, &ps->ifclaimed))
1033 releaseintf(ps, ifnum);
1034 }
1035 destroy_all_async(ps);
1036 usb_autosuspend_device(dev);
1037 usb_unlock_device(dev);
1038 usb_put_dev(dev);
1039 put_pid(ps->disc_pid);
1040 put_cred(ps->cred);
1041
1042 as = async_getcompleted(ps);
1043 while (as) {
1044 free_async(as);
1045 as = async_getcompleted(ps);
1046 }
1047
1048 kfree(ps);
1049 return 0;
1050}
1051
1052static int proc_control(struct usb_dev_state *ps, void __user *arg)
1053{
1054 struct usb_device *dev = ps->dev;
1055 struct usbdevfs_ctrltransfer ctrl;
1056 unsigned int tmo;
1057 unsigned char *tbuf;
1058 unsigned wLength;
1059 int i, pipe, ret;
1060
1061 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
1062 return -EFAULT;
1063 ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.bRequest,
1064 ctrl.wIndex);
1065 if (ret)
1066 return ret;
1067 wLength = ctrl.wLength;
1068 if (wLength > PAGE_SIZE)
1069 return -EINVAL;
1070 ret = usbfs_increase_memory_usage(PAGE_SIZE + sizeof(struct urb) +
1071 sizeof(struct usb_ctrlrequest));
1072 if (ret)
1073 return ret;
1074 tbuf = (unsigned char *)__get_free_page(GFP_KERNEL);
1075 if (!tbuf) {
1076 ret = -ENOMEM;
1077 goto done;
1078 }
1079 tmo = ctrl.timeout;
1080 snoop(&dev->dev, "control urb: bRequestType=%02x "
1081 "bRequest=%02x wValue=%04x "
1082 "wIndex=%04x wLength=%04x\n",
1083 ctrl.bRequestType, ctrl.bRequest, ctrl.wValue,
1084 ctrl.wIndex, ctrl.wLength);
1085 if (ctrl.bRequestType & 0x80) {
1086 if (ctrl.wLength && !access_ok(ctrl.data,
1087 ctrl.wLength)) {
1088 ret = -EINVAL;
1089 goto done;
1090 }
1091 pipe = usb_rcvctrlpipe(dev, 0);
1092 snoop_urb(dev, NULL, pipe, ctrl.wLength, tmo, SUBMIT, NULL, 0);
1093
1094 usb_unlock_device(dev);
1095 i = usb_control_msg(dev, pipe, ctrl.bRequest,
1096 ctrl.bRequestType, ctrl.wValue, ctrl.wIndex,
1097 tbuf, ctrl.wLength, tmo);
1098 usb_lock_device(dev);
1099 snoop_urb(dev, NULL, pipe, max(i, 0), min(i, 0), COMPLETE,
1100 tbuf, max(i, 0));
1101 if ((i > 0) && ctrl.wLength) {
1102 if (copy_to_user(ctrl.data, tbuf, i)) {
1103 ret = -EFAULT;
1104 goto done;
1105 }
1106 }
1107 } else {
1108 if (ctrl.wLength) {
1109 if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) {
1110 ret = -EFAULT;
1111 goto done;
1112 }
1113 }
1114 pipe = usb_sndctrlpipe(dev, 0);
1115 snoop_urb(dev, NULL, pipe, ctrl.wLength, tmo, SUBMIT,
1116 tbuf, ctrl.wLength);
1117
1118 usb_unlock_device(dev);
1119 i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest,
1120 ctrl.bRequestType, ctrl.wValue, ctrl.wIndex,
1121 tbuf, ctrl.wLength, tmo);
1122 usb_lock_device(dev);
1123 snoop_urb(dev, NULL, pipe, max(i, 0), min(i, 0), COMPLETE, NULL, 0);
1124 }
1125 if (i < 0 && i != -EPIPE) {
1126 dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL "
1127 "failed cmd %s rqt %u rq %u len %u ret %d\n",
1128 current->comm, ctrl.bRequestType, ctrl.bRequest,
1129 ctrl.wLength, i);
1130 }
1131 ret = i;
1132 done:
1133 free_page((unsigned long) tbuf);
1134 usbfs_decrease_memory_usage(PAGE_SIZE + sizeof(struct urb) +
1135 sizeof(struct usb_ctrlrequest));
1136 return ret;
1137}
1138
1139static int proc_bulk(struct usb_dev_state *ps, void __user *arg)
1140{
1141 struct usb_device *dev = ps->dev;
1142 struct usbdevfs_bulktransfer bulk;
1143 unsigned int tmo, len1, pipe;
1144 int len2;
1145 unsigned char *tbuf;
1146 int i, ret;
1147
1148 if (copy_from_user(&bulk, arg, sizeof(bulk)))
1149 return -EFAULT;
1150 ret = findintfep(ps->dev, bulk.ep);
1151 if (ret < 0)
1152 return ret;
1153 ret = checkintf(ps, ret);
1154 if (ret)
1155 return ret;
1156 if (bulk.ep & USB_DIR_IN)
1157 pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f);
1158 else
1159 pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f);
1160 if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN)))
1161 return -EINVAL;
1162 len1 = bulk.len;
1163 if (len1 >= (INT_MAX - sizeof(struct urb)))
1164 return -EINVAL;
1165 ret = usbfs_increase_memory_usage(len1 + sizeof(struct urb));
1166 if (ret)
1167 return ret;
1168 tbuf = kmalloc(len1, GFP_KERNEL);
1169 if (!tbuf) {
1170 ret = -ENOMEM;
1171 goto done;
1172 }
1173 tmo = bulk.timeout;
1174 if (bulk.ep & 0x80) {
1175 if (len1 && !access_ok(bulk.data, len1)) {
1176 ret = -EINVAL;
1177 goto done;
1178 }
1179 snoop_urb(dev, NULL, pipe, len1, tmo, SUBMIT, NULL, 0);
1180
1181 usb_unlock_device(dev);
1182 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
1183 usb_lock_device(dev);
1184 snoop_urb(dev, NULL, pipe, len2, i, COMPLETE, tbuf, len2);
1185
1186 if (!i && len2) {
1187 if (copy_to_user(bulk.data, tbuf, len2)) {
1188 ret = -EFAULT;
1189 goto done;
1190 }
1191 }
1192 } else {
1193 if (len1) {
1194 if (copy_from_user(tbuf, bulk.data, len1)) {
1195 ret = -EFAULT;
1196 goto done;
1197 }
1198 }
1199 snoop_urb(dev, NULL, pipe, len1, tmo, SUBMIT, tbuf, len1);
1200
1201 usb_unlock_device(dev);
1202 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
1203 usb_lock_device(dev);
1204 snoop_urb(dev, NULL, pipe, len2, i, COMPLETE, NULL, 0);
1205 }
1206 ret = (i < 0 ? i : len2);
1207 done:
1208 kfree(tbuf);
1209 usbfs_decrease_memory_usage(len1 + sizeof(struct urb));
1210 return ret;
1211}
1212
1213static void check_reset_of_active_ep(struct usb_device *udev,
1214 unsigned int epnum, char *ioctl_name)
1215{
1216 struct usb_host_endpoint **eps;
1217 struct usb_host_endpoint *ep;
1218
1219 eps = (epnum & USB_DIR_IN) ? udev->ep_in : udev->ep_out;
1220 ep = eps[epnum & 0x0f];
1221 if (ep && !list_empty(&ep->urb_list))
1222 dev_warn(&udev->dev, "Process %d (%s) called USBDEVFS_%s for active endpoint 0x%02x\n",
1223 task_pid_nr(current), current->comm,
1224 ioctl_name, epnum);
1225}
1226
1227static int proc_resetep(struct usb_dev_state *ps, void __user *arg)
1228{
1229 unsigned int ep;
1230 int ret;
1231
1232 if (get_user(ep, (unsigned int __user *)arg))
1233 return -EFAULT;
1234 ret = findintfep(ps->dev, ep);
1235 if (ret < 0)
1236 return ret;
1237 ret = checkintf(ps, ret);
1238 if (ret)
1239 return ret;
1240 check_reset_of_active_ep(ps->dev, ep, "RESETEP");
1241 usb_reset_endpoint(ps->dev, ep);
1242 return 0;
1243}
1244
1245static int proc_clearhalt(struct usb_dev_state *ps, void __user *arg)
1246{
1247 unsigned int ep;
1248 int pipe;
1249 int ret;
1250
1251 if (get_user(ep, (unsigned int __user *)arg))
1252 return -EFAULT;
1253 ret = findintfep(ps->dev, ep);
1254 if (ret < 0)
1255 return ret;
1256 ret = checkintf(ps, ret);
1257 if (ret)
1258 return ret;
1259 check_reset_of_active_ep(ps->dev, ep, "CLEAR_HALT");
1260 if (ep & USB_DIR_IN)
1261 pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f);
1262 else
1263 pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f);
1264
1265 return usb_clear_halt(ps->dev, pipe);
1266}
1267
1268static int proc_getdriver(struct usb_dev_state *ps, void __user *arg)
1269{
1270 struct usbdevfs_getdriver gd;
1271 struct usb_interface *intf;
1272 int ret;
1273
1274 if (copy_from_user(&gd, arg, sizeof(gd)))
1275 return -EFAULT;
1276 intf = usb_ifnum_to_if(ps->dev, gd.interface);
1277 if (!intf || !intf->dev.driver)
1278 ret = -ENODATA;
1279 else {
1280 strlcpy(gd.driver, intf->dev.driver->name,
1281 sizeof(gd.driver));
1282 ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0);
1283 }
1284 return ret;
1285}
1286
1287static int proc_connectinfo(struct usb_dev_state *ps, void __user *arg)
1288{
1289 struct usbdevfs_connectinfo ci;
1290
1291 memset(&ci, 0, sizeof(ci));
1292 ci.devnum = ps->dev->devnum;
1293 ci.slow = ps->dev->speed == USB_SPEED_LOW;
1294
1295 if (copy_to_user(arg, &ci, sizeof(ci)))
1296 return -EFAULT;
1297 return 0;
1298}
1299
1300static int proc_conninfo_ex(struct usb_dev_state *ps,
1301 void __user *arg, size_t size)
1302{
1303 struct usbdevfs_conninfo_ex ci;
1304 struct usb_device *udev = ps->dev;
1305
1306 if (size < sizeof(ci.size))
1307 return -EINVAL;
1308
1309 memset(&ci, 0, sizeof(ci));
1310 ci.size = sizeof(ci);
1311 ci.busnum = udev->bus->busnum;
1312 ci.devnum = udev->devnum;
1313 ci.speed = udev->speed;
1314
1315 while (udev && udev->portnum != 0) {
1316 if (++ci.num_ports <= ARRAY_SIZE(ci.ports))
1317 ci.ports[ARRAY_SIZE(ci.ports) - ci.num_ports] =
1318 udev->portnum;
1319 udev = udev->parent;
1320 }
1321
1322 if (ci.num_ports < ARRAY_SIZE(ci.ports))
1323 memmove(&ci.ports[0],
1324 &ci.ports[ARRAY_SIZE(ci.ports) - ci.num_ports],
1325 ci.num_ports);
1326
1327 if (copy_to_user(arg, &ci, min(sizeof(ci), size)))
1328 return -EFAULT;
1329
1330 return 0;
1331}
1332
1333static int proc_resetdevice(struct usb_dev_state *ps)
1334{
1335 struct usb_host_config *actconfig = ps->dev->actconfig;
1336 struct usb_interface *interface;
1337 int i, number;
1338
1339
1340
1341
1342
1343 if (ps->privileges_dropped && actconfig) {
1344 for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) {
1345 interface = actconfig->interface[i];
1346 number = interface->cur_altsetting->desc.bInterfaceNumber;
1347 if (usb_interface_claimed(interface) &&
1348 !test_bit(number, &ps->ifclaimed)) {
1349 dev_warn(&ps->dev->dev,
1350 "usbfs: interface %d claimed by %s while '%s' resets device\n",
1351 number, interface->dev.driver->name, current->comm);
1352 return -EACCES;
1353 }
1354 }
1355 }
1356
1357 return usb_reset_device(ps->dev);
1358}
1359
1360static int proc_setintf(struct usb_dev_state *ps, void __user *arg)
1361{
1362 struct usbdevfs_setinterface setintf;
1363 int ret;
1364
1365 if (copy_from_user(&setintf, arg, sizeof(setintf)))
1366 return -EFAULT;
1367 ret = checkintf(ps, setintf.interface);
1368 if (ret)
1369 return ret;
1370
1371 destroy_async_on_interface(ps, setintf.interface);
1372
1373 return usb_set_interface(ps->dev, setintf.interface,
1374 setintf.altsetting);
1375}
1376
1377static int proc_setconfig(struct usb_dev_state *ps, void __user *arg)
1378{
1379 int u;
1380 int status = 0;
1381 struct usb_host_config *actconfig;
1382
1383 if (get_user(u, (int __user *)arg))
1384 return -EFAULT;
1385
1386 actconfig = ps->dev->actconfig;
1387
1388
1389
1390
1391
1392 if (actconfig) {
1393 int i;
1394
1395 for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) {
1396 if (usb_interface_claimed(actconfig->interface[i])) {
1397 dev_warn(&ps->dev->dev,
1398 "usbfs: interface %d claimed by %s "
1399 "while '%s' sets config #%d\n",
1400 actconfig->interface[i]
1401 ->cur_altsetting
1402 ->desc.bInterfaceNumber,
1403 actconfig->interface[i]
1404 ->dev.driver->name,
1405 current->comm, u);
1406 status = -EBUSY;
1407 break;
1408 }
1409 }
1410 }
1411
1412
1413
1414
1415 if (status == 0) {
1416 if (actconfig && actconfig->desc.bConfigurationValue == u)
1417 status = usb_reset_configuration(ps->dev);
1418 else
1419 status = usb_set_configuration(ps->dev, u);
1420 }
1421
1422 return status;
1423}
1424
1425static struct usb_memory *
1426find_memory_area(struct usb_dev_state *ps, const struct usbdevfs_urb *uurb)
1427{
1428 struct usb_memory *usbm = NULL, *iter;
1429 unsigned long flags;
1430 unsigned long uurb_start = (unsigned long)uurb->buffer;
1431
1432 spin_lock_irqsave(&ps->lock, flags);
1433 list_for_each_entry(iter, &ps->memory_list, memlist) {
1434 if (uurb_start >= iter->vm_start &&
1435 uurb_start < iter->vm_start + iter->size) {
1436 if (uurb->buffer_length > iter->vm_start + iter->size -
1437 uurb_start) {
1438 usbm = ERR_PTR(-EINVAL);
1439 } else {
1440 usbm = iter;
1441 usbm->urb_use_count++;
1442 }
1443 break;
1444 }
1445 }
1446 spin_unlock_irqrestore(&ps->lock, flags);
1447 return usbm;
1448}
1449
1450static int proc_do_submiturb(struct usb_dev_state *ps, struct usbdevfs_urb *uurb,
1451 struct usbdevfs_iso_packet_desc __user *iso_frame_desc,
1452 void __user *arg, sigval_t userurb_sigval)
1453{
1454 struct usbdevfs_iso_packet_desc *isopkt = NULL;
1455 struct usb_host_endpoint *ep;
1456 struct async *as = NULL;
1457 struct usb_ctrlrequest *dr = NULL;
1458 unsigned int u, totlen, isofrmlen;
1459 int i, ret, num_sgs = 0, ifnum = -1;
1460 int number_of_packets = 0;
1461 unsigned int stream_id = 0;
1462 void *buf;
1463 bool is_in;
1464 bool allow_short = false;
1465 bool allow_zero = false;
1466 unsigned long mask = USBDEVFS_URB_SHORT_NOT_OK |
1467 USBDEVFS_URB_BULK_CONTINUATION |
1468 USBDEVFS_URB_NO_FSBR |
1469 USBDEVFS_URB_ZERO_PACKET |
1470 USBDEVFS_URB_NO_INTERRUPT;
1471
1472 if (uurb->type == USBDEVFS_URB_TYPE_ISO)
1473 mask |= USBDEVFS_URB_ISO_ASAP;
1474
1475 if (uurb->flags & ~mask)
1476 return -EINVAL;
1477
1478 if ((unsigned int)uurb->buffer_length >= USBFS_XFER_MAX)
1479 return -EINVAL;
1480 if (uurb->buffer_length > 0 && !uurb->buffer)
1481 return -EINVAL;
1482 if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL &&
1483 (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) {
1484 ifnum = findintfep(ps->dev, uurb->endpoint);
1485 if (ifnum < 0)
1486 return ifnum;
1487 ret = checkintf(ps, ifnum);
1488 if (ret)
1489 return ret;
1490 }
1491 ep = ep_to_host_endpoint(ps->dev, uurb->endpoint);
1492 if (!ep)
1493 return -ENOENT;
1494 is_in = (uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0;
1495
1496 u = 0;
1497 switch (uurb->type) {
1498 case USBDEVFS_URB_TYPE_CONTROL:
1499 if (!usb_endpoint_xfer_control(&ep->desc))
1500 return -EINVAL;
1501
1502 if (uurb->buffer_length < 8)
1503 return -EINVAL;
1504 dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL);
1505 if (!dr)
1506 return -ENOMEM;
1507 if (copy_from_user(dr, uurb->buffer, 8)) {
1508 ret = -EFAULT;
1509 goto error;
1510 }
1511 if (uurb->buffer_length < (le16_to_cpu(dr->wLength) + 8)) {
1512 ret = -EINVAL;
1513 goto error;
1514 }
1515 ret = check_ctrlrecip(ps, dr->bRequestType, dr->bRequest,
1516 le16_to_cpu(dr->wIndex));
1517 if (ret)
1518 goto error;
1519 uurb->buffer_length = le16_to_cpu(dr->wLength);
1520 uurb->buffer += 8;
1521 if ((dr->bRequestType & USB_DIR_IN) && uurb->buffer_length) {
1522 is_in = 1;
1523 uurb->endpoint |= USB_DIR_IN;
1524 } else {
1525 is_in = 0;
1526 uurb->endpoint &= ~USB_DIR_IN;
1527 }
1528 if (is_in)
1529 allow_short = true;
1530 snoop(&ps->dev->dev, "control urb: bRequestType=%02x "
1531 "bRequest=%02x wValue=%04x "
1532 "wIndex=%04x wLength=%04x\n",
1533 dr->bRequestType, dr->bRequest,
1534 __le16_to_cpu(dr->wValue),
1535 __le16_to_cpu(dr->wIndex),
1536 __le16_to_cpu(dr->wLength));
1537 u = sizeof(struct usb_ctrlrequest);
1538 break;
1539
1540 case USBDEVFS_URB_TYPE_BULK:
1541 if (!is_in)
1542 allow_zero = true;
1543 else
1544 allow_short = true;
1545 switch (usb_endpoint_type(&ep->desc)) {
1546 case USB_ENDPOINT_XFER_CONTROL:
1547 case USB_ENDPOINT_XFER_ISOC:
1548 return -EINVAL;
1549 case USB_ENDPOINT_XFER_INT:
1550
1551 uurb->type = USBDEVFS_URB_TYPE_INTERRUPT;
1552 goto interrupt_urb;
1553 }
1554 num_sgs = DIV_ROUND_UP(uurb->buffer_length, USB_SG_SIZE);
1555 if (num_sgs == 1 || num_sgs > ps->dev->bus->sg_tablesize)
1556 num_sgs = 0;
1557 if (ep->streams)
1558 stream_id = uurb->stream_id;
1559 break;
1560
1561 case USBDEVFS_URB_TYPE_INTERRUPT:
1562 if (!usb_endpoint_xfer_int(&ep->desc))
1563 return -EINVAL;
1564 interrupt_urb:
1565 if (!is_in)
1566 allow_zero = true;
1567 else
1568 allow_short = true;
1569 break;
1570
1571 case USBDEVFS_URB_TYPE_ISO:
1572
1573 if (uurb->number_of_packets < 1 ||
1574 uurb->number_of_packets > 128)
1575 return -EINVAL;
1576 if (!usb_endpoint_xfer_isoc(&ep->desc))
1577 return -EINVAL;
1578 number_of_packets = uurb->number_of_packets;
1579 isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) *
1580 number_of_packets;
1581 isopkt = memdup_user(iso_frame_desc, isofrmlen);
1582 if (IS_ERR(isopkt)) {
1583 ret = PTR_ERR(isopkt);
1584 isopkt = NULL;
1585 goto error;
1586 }
1587 for (totlen = u = 0; u < number_of_packets; u++) {
1588
1589
1590
1591
1592 if (isopkt[u].length > 98304) {
1593 ret = -EINVAL;
1594 goto error;
1595 }
1596 totlen += isopkt[u].length;
1597 }
1598 u *= sizeof(struct usb_iso_packet_descriptor);
1599 uurb->buffer_length = totlen;
1600 break;
1601
1602 default:
1603 return -EINVAL;
1604 }
1605
1606 if (uurb->buffer_length > 0 &&
1607 !access_ok(uurb->buffer, uurb->buffer_length)) {
1608 ret = -EFAULT;
1609 goto error;
1610 }
1611 as = alloc_async(number_of_packets);
1612 if (!as) {
1613 ret = -ENOMEM;
1614 goto error;
1615 }
1616
1617 as->usbm = find_memory_area(ps, uurb);
1618 if (IS_ERR(as->usbm)) {
1619 ret = PTR_ERR(as->usbm);
1620 as->usbm = NULL;
1621 goto error;
1622 }
1623
1624
1625
1626
1627 if (as->usbm)
1628 num_sgs = 0;
1629
1630 u += sizeof(struct async) + sizeof(struct urb) + uurb->buffer_length +
1631 num_sgs * sizeof(struct scatterlist);
1632 ret = usbfs_increase_memory_usage(u);
1633 if (ret)
1634 goto error;
1635 as->mem_usage = u;
1636
1637 if (num_sgs) {
1638 as->urb->sg = kmalloc_array(num_sgs,
1639 sizeof(struct scatterlist),
1640 GFP_KERNEL);
1641 if (!as->urb->sg) {
1642 ret = -ENOMEM;
1643 goto error;
1644 }
1645 as->urb->num_sgs = num_sgs;
1646 sg_init_table(as->urb->sg, as->urb->num_sgs);
1647
1648 totlen = uurb->buffer_length;
1649 for (i = 0; i < as->urb->num_sgs; i++) {
1650 u = (totlen > USB_SG_SIZE) ? USB_SG_SIZE : totlen;
1651 buf = kmalloc(u, GFP_KERNEL);
1652 if (!buf) {
1653 ret = -ENOMEM;
1654 goto error;
1655 }
1656 sg_set_buf(&as->urb->sg[i], buf, u);
1657
1658 if (!is_in) {
1659 if (copy_from_user(buf, uurb->buffer, u)) {
1660 ret = -EFAULT;
1661 goto error;
1662 }
1663 uurb->buffer += u;
1664 }
1665 totlen -= u;
1666 }
1667 } else if (uurb->buffer_length > 0) {
1668 if (as->usbm) {
1669 unsigned long uurb_start = (unsigned long)uurb->buffer;
1670
1671 as->urb->transfer_buffer = as->usbm->mem +
1672 (uurb_start - as->usbm->vm_start);
1673 } else {
1674 as->urb->transfer_buffer = kmalloc(uurb->buffer_length,
1675 GFP_KERNEL);
1676 if (!as->urb->transfer_buffer) {
1677 ret = -ENOMEM;
1678 goto error;
1679 }
1680 if (!is_in) {
1681 if (copy_from_user(as->urb->transfer_buffer,
1682 uurb->buffer,
1683 uurb->buffer_length)) {
1684 ret = -EFAULT;
1685 goto error;
1686 }
1687 } else if (uurb->type == USBDEVFS_URB_TYPE_ISO) {
1688
1689
1690
1691
1692
1693
1694 memset(as->urb->transfer_buffer, 0,
1695 uurb->buffer_length);
1696 }
1697 }
1698 }
1699 as->urb->dev = ps->dev;
1700 as->urb->pipe = (uurb->type << 30) |
1701 __create_pipe(ps->dev, uurb->endpoint & 0xf) |
1702 (uurb->endpoint & USB_DIR_IN);
1703
1704
1705
1706
1707
1708 u = (is_in ? URB_DIR_IN : URB_DIR_OUT);
1709 if (uurb->flags & USBDEVFS_URB_ISO_ASAP)
1710 u |= URB_ISO_ASAP;
1711 if (allow_short && uurb->flags & USBDEVFS_URB_SHORT_NOT_OK)
1712 u |= URB_SHORT_NOT_OK;
1713 if (allow_zero && uurb->flags & USBDEVFS_URB_ZERO_PACKET)
1714 u |= URB_ZERO_PACKET;
1715 if (uurb->flags & USBDEVFS_URB_NO_INTERRUPT)
1716 u |= URB_NO_INTERRUPT;
1717 as->urb->transfer_flags = u;
1718
1719 if (!allow_short && uurb->flags & USBDEVFS_URB_SHORT_NOT_OK)
1720 dev_warn(&ps->dev->dev, "Requested nonsensical USBDEVFS_URB_SHORT_NOT_OK.\n");
1721 if (!allow_zero && uurb->flags & USBDEVFS_URB_ZERO_PACKET)
1722 dev_warn(&ps->dev->dev, "Requested nonsensical USBDEVFS_URB_ZERO_PACKET.\n");
1723
1724 as->urb->transfer_buffer_length = uurb->buffer_length;
1725 as->urb->setup_packet = (unsigned char *)dr;
1726 dr = NULL;
1727 as->urb->start_frame = uurb->start_frame;
1728 as->urb->number_of_packets = number_of_packets;
1729 as->urb->stream_id = stream_id;
1730
1731 if (ep->desc.bInterval) {
1732 if (uurb->type == USBDEVFS_URB_TYPE_ISO ||
1733 ps->dev->speed == USB_SPEED_HIGH ||
1734 ps->dev->speed >= USB_SPEED_SUPER)
1735 as->urb->interval = 1 <<
1736 min(15, ep->desc.bInterval - 1);
1737 else
1738 as->urb->interval = ep->desc.bInterval;
1739 }
1740
1741 as->urb->context = as;
1742 as->urb->complete = async_completed;
1743 for (totlen = u = 0; u < number_of_packets; u++) {
1744 as->urb->iso_frame_desc[u].offset = totlen;
1745 as->urb->iso_frame_desc[u].length = isopkt[u].length;
1746 totlen += isopkt[u].length;
1747 }
1748 kfree(isopkt);
1749 isopkt = NULL;
1750 as->ps = ps;
1751 as->userurb = arg;
1752 as->userurb_sigval = userurb_sigval;
1753 if (as->usbm) {
1754 unsigned long uurb_start = (unsigned long)uurb->buffer;
1755
1756 as->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1757 as->urb->transfer_dma = as->usbm->dma_handle +
1758 (uurb_start - as->usbm->vm_start);
1759 } else if (is_in && uurb->buffer_length > 0)
1760 as->userbuffer = uurb->buffer;
1761 as->signr = uurb->signr;
1762 as->ifnum = ifnum;
1763 as->pid = get_pid(task_pid(current));
1764 as->cred = get_current_cred();
1765 snoop_urb(ps->dev, as->userurb, as->urb->pipe,
1766 as->urb->transfer_buffer_length, 0, SUBMIT,
1767 NULL, 0);
1768 if (!is_in)
1769 snoop_urb_data(as->urb, as->urb->transfer_buffer_length);
1770
1771 async_newpending(as);
1772
1773 if (usb_endpoint_xfer_bulk(&ep->desc)) {
1774 spin_lock_irq(&ps->lock);
1775
1776
1777
1778
1779
1780 as->bulk_addr = usb_endpoint_num(&ep->desc) |
1781 ((ep->desc.bEndpointAddress & USB_ENDPOINT_DIR_MASK)
1782 >> 3);
1783
1784
1785
1786
1787 if (uurb->flags & USBDEVFS_URB_BULK_CONTINUATION)
1788 as->bulk_status = AS_CONTINUATION;
1789 else
1790 ps->disabled_bulk_eps &= ~(1 << as->bulk_addr);
1791
1792
1793
1794
1795 if (ps->disabled_bulk_eps & (1 << as->bulk_addr))
1796 ret = -EREMOTEIO;
1797 else
1798 ret = usb_submit_urb(as->urb, GFP_ATOMIC);
1799 spin_unlock_irq(&ps->lock);
1800 } else {
1801 ret = usb_submit_urb(as->urb, GFP_KERNEL);
1802 }
1803
1804 if (ret) {
1805 dev_printk(KERN_DEBUG, &ps->dev->dev,
1806 "usbfs: usb_submit_urb returned %d\n", ret);
1807 snoop_urb(ps->dev, as->userurb, as->urb->pipe,
1808 0, ret, COMPLETE, NULL, 0);
1809 async_removepending(as);
1810 goto error;
1811 }
1812 return 0;
1813
1814 error:
1815 kfree(isopkt);
1816 kfree(dr);
1817 if (as)
1818 free_async(as);
1819 return ret;
1820}
1821
1822static int proc_submiturb(struct usb_dev_state *ps, void __user *arg)
1823{
1824 struct usbdevfs_urb uurb;
1825 sigval_t userurb_sigval;
1826
1827 if (copy_from_user(&uurb, arg, sizeof(uurb)))
1828 return -EFAULT;
1829
1830 memset(&userurb_sigval, 0, sizeof(userurb_sigval));
1831 userurb_sigval.sival_ptr = arg;
1832
1833 return proc_do_submiturb(ps, &uurb,
1834 (((struct usbdevfs_urb __user *)arg)->iso_frame_desc),
1835 arg, userurb_sigval);
1836}
1837
1838static int proc_unlinkurb(struct usb_dev_state *ps, void __user *arg)
1839{
1840 struct urb *urb;
1841 struct async *as;
1842 unsigned long flags;
1843
1844 spin_lock_irqsave(&ps->lock, flags);
1845 as = async_getpending(ps, arg);
1846 if (!as) {
1847 spin_unlock_irqrestore(&ps->lock, flags);
1848 return -EINVAL;
1849 }
1850
1851 urb = as->urb;
1852 usb_get_urb(urb);
1853 spin_unlock_irqrestore(&ps->lock, flags);
1854
1855 usb_kill_urb(urb);
1856 usb_put_urb(urb);
1857
1858 return 0;
1859}
1860
1861static void compute_isochronous_actual_length(struct urb *urb)
1862{
1863 unsigned int i;
1864
1865 if (urb->number_of_packets > 0) {
1866 urb->actual_length = 0;
1867 for (i = 0; i < urb->number_of_packets; i++)
1868 urb->actual_length +=
1869 urb->iso_frame_desc[i].actual_length;
1870 }
1871}
1872
1873static int processcompl(struct async *as, void __user * __user *arg)
1874{
1875 struct urb *urb = as->urb;
1876 struct usbdevfs_urb __user *userurb = as->userurb;
1877 void __user *addr = as->userurb;
1878 unsigned int i;
1879
1880 compute_isochronous_actual_length(urb);
1881 if (as->userbuffer && urb->actual_length) {
1882 if (copy_urb_data_to_user(as->userbuffer, urb))
1883 goto err_out;
1884 }
1885 if (put_user(as->status, &userurb->status))
1886 goto err_out;
1887 if (put_user(urb->actual_length, &userurb->actual_length))
1888 goto err_out;
1889 if (put_user(urb->error_count, &userurb->error_count))
1890 goto err_out;
1891
1892 if (usb_endpoint_xfer_isoc(&urb->ep->desc)) {
1893 for (i = 0; i < urb->number_of_packets; i++) {
1894 if (put_user(urb->iso_frame_desc[i].actual_length,
1895 &userurb->iso_frame_desc[i].actual_length))
1896 goto err_out;
1897 if (put_user(urb->iso_frame_desc[i].status,
1898 &userurb->iso_frame_desc[i].status))
1899 goto err_out;
1900 }
1901 }
1902
1903 if (put_user(addr, (void __user * __user *)arg))
1904 return -EFAULT;
1905 return 0;
1906
1907err_out:
1908 return -EFAULT;
1909}
1910
1911static struct async *reap_as(struct usb_dev_state *ps)
1912{
1913 DECLARE_WAITQUEUE(wait, current);
1914 struct async *as = NULL;
1915 struct usb_device *dev = ps->dev;
1916
1917 add_wait_queue(&ps->wait, &wait);
1918 for (;;) {
1919 __set_current_state(TASK_INTERRUPTIBLE);
1920 as = async_getcompleted(ps);
1921 if (as || !connected(ps))
1922 break;
1923 if (signal_pending(current))
1924 break;
1925 usb_unlock_device(dev);
1926 schedule();
1927 usb_lock_device(dev);
1928 }
1929 remove_wait_queue(&ps->wait, &wait);
1930 set_current_state(TASK_RUNNING);
1931 return as;
1932}
1933
1934static int proc_reapurb(struct usb_dev_state *ps, void __user *arg)
1935{
1936 struct async *as = reap_as(ps);
1937
1938 if (as) {
1939 int retval;
1940
1941 snoop(&ps->dev->dev, "reap %pK\n", as->userurb);
1942 retval = processcompl(as, (void __user * __user *)arg);
1943 free_async(as);
1944 return retval;
1945 }
1946 if (signal_pending(current))
1947 return -EINTR;
1948 return -ENODEV;
1949}
1950
1951static int proc_reapurbnonblock(struct usb_dev_state *ps, void __user *arg)
1952{
1953 int retval;
1954 struct async *as;
1955
1956 as = async_getcompleted(ps);
1957 if (as) {
1958 snoop(&ps->dev->dev, "reap %pK\n", as->userurb);
1959 retval = processcompl(as, (void __user * __user *)arg);
1960 free_async(as);
1961 } else {
1962 retval = (connected(ps) ? -EAGAIN : -ENODEV);
1963 }
1964 return retval;
1965}
1966
1967#ifdef CONFIG_COMPAT
1968static int proc_control_compat(struct usb_dev_state *ps,
1969 struct usbdevfs_ctrltransfer32 __user *p32)
1970{
1971 struct usbdevfs_ctrltransfer __user *p;
1972 __u32 udata;
1973 p = compat_alloc_user_space(sizeof(*p));
1974 if (copy_in_user(p, p32, (sizeof(*p32) - sizeof(compat_caddr_t))) ||
1975 get_user(udata, &p32->data) ||
1976 put_user(compat_ptr(udata), &p->data))
1977 return -EFAULT;
1978 return proc_control(ps, p);
1979}
1980
1981static int proc_bulk_compat(struct usb_dev_state *ps,
1982 struct usbdevfs_bulktransfer32 __user *p32)
1983{
1984 struct usbdevfs_bulktransfer __user *p;
1985 compat_uint_t n;
1986 compat_caddr_t addr;
1987
1988 p = compat_alloc_user_space(sizeof(*p));
1989
1990 if (get_user(n, &p32->ep) || put_user(n, &p->ep) ||
1991 get_user(n, &p32->len) || put_user(n, &p->len) ||
1992 get_user(n, &p32->timeout) || put_user(n, &p->timeout) ||
1993 get_user(addr, &p32->data) || put_user(compat_ptr(addr), &p->data))
1994 return -EFAULT;
1995
1996 return proc_bulk(ps, p);
1997}
1998static int proc_disconnectsignal_compat(struct usb_dev_state *ps, void __user *arg)
1999{
2000 struct usbdevfs_disconnectsignal32 ds;
2001
2002 if (copy_from_user(&ds, arg, sizeof(ds)))
2003 return -EFAULT;
2004 ps->discsignr = ds.signr;
2005 ps->disccontext.sival_int = ds.context;
2006 return 0;
2007}
2008
2009static int get_urb32(struct usbdevfs_urb *kurb,
2010 struct usbdevfs_urb32 __user *uurb)
2011{
2012 struct usbdevfs_urb32 urb32;
2013 if (copy_from_user(&urb32, uurb, sizeof(*uurb)))
2014 return -EFAULT;
2015 kurb->type = urb32.type;
2016 kurb->endpoint = urb32.endpoint;
2017 kurb->status = urb32.status;
2018 kurb->flags = urb32.flags;
2019 kurb->buffer = compat_ptr(urb32.buffer);
2020 kurb->buffer_length = urb32.buffer_length;
2021 kurb->actual_length = urb32.actual_length;
2022 kurb->start_frame = urb32.start_frame;
2023 kurb->number_of_packets = urb32.number_of_packets;
2024 kurb->error_count = urb32.error_count;
2025 kurb->signr = urb32.signr;
2026 kurb->usercontext = compat_ptr(urb32.usercontext);
2027 return 0;
2028}
2029
2030static int proc_submiturb_compat(struct usb_dev_state *ps, void __user *arg)
2031{
2032 struct usbdevfs_urb uurb;
2033 sigval_t userurb_sigval;
2034
2035 if (get_urb32(&uurb, (struct usbdevfs_urb32 __user *)arg))
2036 return -EFAULT;
2037
2038 memset(&userurb_sigval, 0, sizeof(userurb_sigval));
2039 userurb_sigval.sival_int = ptr_to_compat(arg);
2040
2041 return proc_do_submiturb(ps, &uurb,
2042 ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc,
2043 arg, userurb_sigval);
2044}
2045
2046static int processcompl_compat(struct async *as, void __user * __user *arg)
2047{
2048 struct urb *urb = as->urb;
2049 struct usbdevfs_urb32 __user *userurb = as->userurb;
2050 void __user *addr = as->userurb;
2051 unsigned int i;
2052
2053 compute_isochronous_actual_length(urb);
2054 if (as->userbuffer && urb->actual_length) {
2055 if (copy_urb_data_to_user(as->userbuffer, urb))
2056 return -EFAULT;
2057 }
2058 if (put_user(as->status, &userurb->status))
2059 return -EFAULT;
2060 if (put_user(urb->actual_length, &userurb->actual_length))
2061 return -EFAULT;
2062 if (put_user(urb->error_count, &userurb->error_count))
2063 return -EFAULT;
2064
2065 if (usb_endpoint_xfer_isoc(&urb->ep->desc)) {
2066 for (i = 0; i < urb->number_of_packets; i++) {
2067 if (put_user(urb->iso_frame_desc[i].actual_length,
2068 &userurb->iso_frame_desc[i].actual_length))
2069 return -EFAULT;
2070 if (put_user(urb->iso_frame_desc[i].status,
2071 &userurb->iso_frame_desc[i].status))
2072 return -EFAULT;
2073 }
2074 }
2075
2076 if (put_user(ptr_to_compat(addr), (u32 __user *)arg))
2077 return -EFAULT;
2078 return 0;
2079}
2080
2081static int proc_reapurb_compat(struct usb_dev_state *ps, void __user *arg)
2082{
2083 struct async *as = reap_as(ps);
2084
2085 if (as) {
2086 int retval;
2087
2088 snoop(&ps->dev->dev, "reap %pK\n", as->userurb);
2089 retval = processcompl_compat(as, (void __user * __user *)arg);
2090 free_async(as);
2091 return retval;
2092 }
2093 if (signal_pending(current))
2094 return -EINTR;
2095 return -ENODEV;
2096}
2097
2098static int proc_reapurbnonblock_compat(struct usb_dev_state *ps, void __user *arg)
2099{
2100 int retval;
2101 struct async *as;
2102
2103 as = async_getcompleted(ps);
2104 if (as) {
2105 snoop(&ps->dev->dev, "reap %pK\n", as->userurb);
2106 retval = processcompl_compat(as, (void __user * __user *)arg);
2107 free_async(as);
2108 } else {
2109 retval = (connected(ps) ? -EAGAIN : -ENODEV);
2110 }
2111 return retval;
2112}
2113
2114
2115#endif
2116
2117static int proc_disconnectsignal(struct usb_dev_state *ps, void __user *arg)
2118{
2119 struct usbdevfs_disconnectsignal ds;
2120
2121 if (copy_from_user(&ds, arg, sizeof(ds)))
2122 return -EFAULT;
2123 ps->discsignr = ds.signr;
2124 ps->disccontext.sival_ptr = ds.context;
2125 return 0;
2126}
2127
2128static int proc_claiminterface(struct usb_dev_state *ps, void __user *arg)
2129{
2130 unsigned int ifnum;
2131
2132 if (get_user(ifnum, (unsigned int __user *)arg))
2133 return -EFAULT;
2134 return claimintf(ps, ifnum);
2135}
2136
2137static int proc_releaseinterface(struct usb_dev_state *ps, void __user *arg)
2138{
2139 unsigned int ifnum;
2140 int ret;
2141
2142 if (get_user(ifnum, (unsigned int __user *)arg))
2143 return -EFAULT;
2144 ret = releaseintf(ps, ifnum);
2145 if (ret < 0)
2146 return ret;
2147 destroy_async_on_interface(ps, ifnum);
2148 return 0;
2149}
2150
2151static int proc_ioctl(struct usb_dev_state *ps, struct usbdevfs_ioctl *ctl)
2152{
2153 int size;
2154 void *buf = NULL;
2155 int retval = 0;
2156 struct usb_interface *intf = NULL;
2157 struct usb_driver *driver = NULL;
2158
2159 if (ps->privileges_dropped)
2160 return -EACCES;
2161
2162 if (!connected(ps))
2163 return -ENODEV;
2164
2165
2166 size = _IOC_SIZE(ctl->ioctl_code);
2167 if (size > 0) {
2168 buf = kmalloc(size, GFP_KERNEL);
2169 if (buf == NULL)
2170 return -ENOMEM;
2171 if ((_IOC_DIR(ctl->ioctl_code) & _IOC_WRITE)) {
2172 if (copy_from_user(buf, ctl->data, size)) {
2173 kfree(buf);
2174 return -EFAULT;
2175 }
2176 } else {
2177 memset(buf, 0, size);
2178 }
2179 }
2180
2181 if (ps->dev->state != USB_STATE_CONFIGURED)
2182 retval = -EHOSTUNREACH;
2183 else if (!(intf = usb_ifnum_to_if(ps->dev, ctl->ifno)))
2184 retval = -EINVAL;
2185 else switch (ctl->ioctl_code) {
2186
2187
2188 case USBDEVFS_DISCONNECT:
2189 if (intf->dev.driver) {
2190 driver = to_usb_driver(intf->dev.driver);
2191 dev_dbg(&intf->dev, "disconnect by usbfs\n");
2192 usb_driver_release_interface(driver, intf);
2193 } else
2194 retval = -ENODATA;
2195 break;
2196
2197
2198 case USBDEVFS_CONNECT:
2199 if (!intf->dev.driver)
2200 retval = device_attach(&intf->dev);
2201 else
2202 retval = -EBUSY;
2203 break;
2204
2205
2206 default:
2207 if (intf->dev.driver)
2208 driver = to_usb_driver(intf->dev.driver);
2209 if (driver == NULL || driver->unlocked_ioctl == NULL) {
2210 retval = -ENOTTY;
2211 } else {
2212 retval = driver->unlocked_ioctl(intf, ctl->ioctl_code, buf);
2213 if (retval == -ENOIOCTLCMD)
2214 retval = -ENOTTY;
2215 }
2216 }
2217
2218
2219 if (retval >= 0
2220 && (_IOC_DIR(ctl->ioctl_code) & _IOC_READ) != 0
2221 && size > 0
2222 && copy_to_user(ctl->data, buf, size) != 0)
2223 retval = -EFAULT;
2224
2225 kfree(buf);
2226 return retval;
2227}
2228
2229static int proc_ioctl_default(struct usb_dev_state *ps, void __user *arg)
2230{
2231 struct usbdevfs_ioctl ctrl;
2232
2233 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
2234 return -EFAULT;
2235 return proc_ioctl(ps, &ctrl);
2236}
2237
2238#ifdef CONFIG_COMPAT
2239static int proc_ioctl_compat(struct usb_dev_state *ps, compat_uptr_t arg)
2240{
2241 struct usbdevfs_ioctl32 ioc32;
2242 struct usbdevfs_ioctl ctrl;
2243
2244 if (copy_from_user(&ioc32, compat_ptr(arg), sizeof(ioc32)))
2245 return -EFAULT;
2246 ctrl.ifno = ioc32.ifno;
2247 ctrl.ioctl_code = ioc32.ioctl_code;
2248 ctrl.data = compat_ptr(ioc32.data);
2249 return proc_ioctl(ps, &ctrl);
2250}
2251#endif
2252
2253static int proc_claim_port(struct usb_dev_state *ps, void __user *arg)
2254{
2255 unsigned portnum;
2256 int rc;
2257
2258 if (get_user(portnum, (unsigned __user *) arg))
2259 return -EFAULT;
2260 rc = usb_hub_claim_port(ps->dev, portnum, ps);
2261 if (rc == 0)
2262 snoop(&ps->dev->dev, "port %d claimed by process %d: %s\n",
2263 portnum, task_pid_nr(current), current->comm);
2264 return rc;
2265}
2266
2267static int proc_release_port(struct usb_dev_state *ps, void __user *arg)
2268{
2269 unsigned portnum;
2270
2271 if (get_user(portnum, (unsigned __user *) arg))
2272 return -EFAULT;
2273 return usb_hub_release_port(ps->dev, portnum, ps);
2274}
2275
2276static int proc_get_capabilities(struct usb_dev_state *ps, void __user *arg)
2277{
2278 __u32 caps;
2279
2280 caps = USBDEVFS_CAP_ZERO_PACKET | USBDEVFS_CAP_NO_PACKET_SIZE_LIM |
2281 USBDEVFS_CAP_REAP_AFTER_DISCONNECT | USBDEVFS_CAP_MMAP |
2282 USBDEVFS_CAP_DROP_PRIVILEGES | USBDEVFS_CAP_CONNINFO_EX;
2283 if (!ps->dev->bus->no_stop_on_short)
2284 caps |= USBDEVFS_CAP_BULK_CONTINUATION;
2285 if (ps->dev->bus->sg_tablesize)
2286 caps |= USBDEVFS_CAP_BULK_SCATTER_GATHER;
2287
2288 if (put_user(caps, (__u32 __user *)arg))
2289 return -EFAULT;
2290
2291 return 0;
2292}
2293
2294static int proc_disconnect_claim(struct usb_dev_state *ps, void __user *arg)
2295{
2296 struct usbdevfs_disconnect_claim dc;
2297 struct usb_interface *intf;
2298
2299 if (copy_from_user(&dc, arg, sizeof(dc)))
2300 return -EFAULT;
2301
2302 intf = usb_ifnum_to_if(ps->dev, dc.interface);
2303 if (!intf)
2304 return -EINVAL;
2305
2306 if (intf->dev.driver) {
2307 struct usb_driver *driver = to_usb_driver(intf->dev.driver);
2308
2309 if (ps->privileges_dropped)
2310 return -EACCES;
2311
2312 if ((dc.flags & USBDEVFS_DISCONNECT_CLAIM_IF_DRIVER) &&
2313 strncmp(dc.driver, intf->dev.driver->name,
2314 sizeof(dc.driver)) != 0)
2315 return -EBUSY;
2316
2317 if ((dc.flags & USBDEVFS_DISCONNECT_CLAIM_EXCEPT_DRIVER) &&
2318 strncmp(dc.driver, intf->dev.driver->name,
2319 sizeof(dc.driver)) == 0)
2320 return -EBUSY;
2321
2322 dev_dbg(&intf->dev, "disconnect by usbfs\n");
2323 usb_driver_release_interface(driver, intf);
2324 }
2325
2326 return claimintf(ps, dc.interface);
2327}
2328
2329static int proc_alloc_streams(struct usb_dev_state *ps, void __user *arg)
2330{
2331 unsigned num_streams, num_eps;
2332 struct usb_host_endpoint **eps;
2333 struct usb_interface *intf;
2334 int r;
2335
2336 r = parse_usbdevfs_streams(ps, arg, &num_streams, &num_eps,
2337 &eps, &intf);
2338 if (r)
2339 return r;
2340
2341 destroy_async_on_interface(ps,
2342 intf->altsetting[0].desc.bInterfaceNumber);
2343
2344 r = usb_alloc_streams(intf, eps, num_eps, num_streams, GFP_KERNEL);
2345 kfree(eps);
2346 return r;
2347}
2348
2349static int proc_free_streams(struct usb_dev_state *ps, void __user *arg)
2350{
2351 unsigned num_eps;
2352 struct usb_host_endpoint **eps;
2353 struct usb_interface *intf;
2354 int r;
2355
2356 r = parse_usbdevfs_streams(ps, arg, NULL, &num_eps, &eps, &intf);
2357 if (r)
2358 return r;
2359
2360 destroy_async_on_interface(ps,
2361 intf->altsetting[0].desc.bInterfaceNumber);
2362
2363 r = usb_free_streams(intf, eps, num_eps, GFP_KERNEL);
2364 kfree(eps);
2365 return r;
2366}
2367
2368static int proc_drop_privileges(struct usb_dev_state *ps, void __user *arg)
2369{
2370 u32 data;
2371
2372 if (copy_from_user(&data, arg, sizeof(data)))
2373 return -EFAULT;
2374
2375
2376
2377
2378
2379 ps->interface_allowed_mask &= data;
2380 ps->privileges_dropped = true;
2381
2382 return 0;
2383}
2384
2385
2386
2387
2388
2389
2390static long usbdev_do_ioctl(struct file *file, unsigned int cmd,
2391 void __user *p)
2392{
2393 struct usb_dev_state *ps = file->private_data;
2394 struct inode *inode = file_inode(file);
2395 struct usb_device *dev = ps->dev;
2396 int ret = -ENOTTY;
2397
2398 if (!(file->f_mode & FMODE_WRITE))
2399 return -EPERM;
2400
2401 usb_lock_device(dev);
2402
2403
2404 switch (cmd) {
2405 case USBDEVFS_REAPURB:
2406 snoop(&dev->dev, "%s: REAPURB\n", __func__);
2407 ret = proc_reapurb(ps, p);
2408 goto done;
2409
2410 case USBDEVFS_REAPURBNDELAY:
2411 snoop(&dev->dev, "%s: REAPURBNDELAY\n", __func__);
2412 ret = proc_reapurbnonblock(ps, p);
2413 goto done;
2414
2415#ifdef CONFIG_COMPAT
2416 case USBDEVFS_REAPURB32:
2417 snoop(&dev->dev, "%s: REAPURB32\n", __func__);
2418 ret = proc_reapurb_compat(ps, p);
2419 goto done;
2420
2421 case USBDEVFS_REAPURBNDELAY32:
2422 snoop(&dev->dev, "%s: REAPURBNDELAY32\n", __func__);
2423 ret = proc_reapurbnonblock_compat(ps, p);
2424 goto done;
2425#endif
2426 }
2427
2428 if (!connected(ps)) {
2429 usb_unlock_device(dev);
2430 return -ENODEV;
2431 }
2432
2433 switch (cmd) {
2434 case USBDEVFS_CONTROL:
2435 snoop(&dev->dev, "%s: CONTROL\n", __func__);
2436 ret = proc_control(ps, p);
2437 if (ret >= 0)
2438 inode->i_mtime = current_time(inode);
2439 break;
2440
2441 case USBDEVFS_BULK:
2442 snoop(&dev->dev, "%s: BULK\n", __func__);
2443 ret = proc_bulk(ps, p);
2444 if (ret >= 0)
2445 inode->i_mtime = current_time(inode);
2446 break;
2447
2448 case USBDEVFS_RESETEP:
2449 snoop(&dev->dev, "%s: RESETEP\n", __func__);
2450 ret = proc_resetep(ps, p);
2451 if (ret >= 0)
2452 inode->i_mtime = current_time(inode);
2453 break;
2454
2455 case USBDEVFS_RESET:
2456 snoop(&dev->dev, "%s: RESET\n", __func__);
2457 ret = proc_resetdevice(ps);
2458 break;
2459
2460 case USBDEVFS_CLEAR_HALT:
2461 snoop(&dev->dev, "%s: CLEAR_HALT\n", __func__);
2462 ret = proc_clearhalt(ps, p);
2463 if (ret >= 0)
2464 inode->i_mtime = current_time(inode);
2465 break;
2466
2467 case USBDEVFS_GETDRIVER:
2468 snoop(&dev->dev, "%s: GETDRIVER\n", __func__);
2469 ret = proc_getdriver(ps, p);
2470 break;
2471
2472 case USBDEVFS_CONNECTINFO:
2473 snoop(&dev->dev, "%s: CONNECTINFO\n", __func__);
2474 ret = proc_connectinfo(ps, p);
2475 break;
2476
2477 case USBDEVFS_SETINTERFACE:
2478 snoop(&dev->dev, "%s: SETINTERFACE\n", __func__);
2479 ret = proc_setintf(ps, p);
2480 break;
2481
2482 case USBDEVFS_SETCONFIGURATION:
2483 snoop(&dev->dev, "%s: SETCONFIGURATION\n", __func__);
2484 ret = proc_setconfig(ps, p);
2485 break;
2486
2487 case USBDEVFS_SUBMITURB:
2488 snoop(&dev->dev, "%s: SUBMITURB\n", __func__);
2489 ret = proc_submiturb(ps, p);
2490 if (ret >= 0)
2491 inode->i_mtime = current_time(inode);
2492 break;
2493
2494#ifdef CONFIG_COMPAT
2495 case USBDEVFS_CONTROL32:
2496 snoop(&dev->dev, "%s: CONTROL32\n", __func__);
2497 ret = proc_control_compat(ps, p);
2498 if (ret >= 0)
2499 inode->i_mtime = current_time(inode);
2500 break;
2501
2502 case USBDEVFS_BULK32:
2503 snoop(&dev->dev, "%s: BULK32\n", __func__);
2504 ret = proc_bulk_compat(ps, p);
2505 if (ret >= 0)
2506 inode->i_mtime = current_time(inode);
2507 break;
2508
2509 case USBDEVFS_DISCSIGNAL32:
2510 snoop(&dev->dev, "%s: DISCSIGNAL32\n", __func__);
2511 ret = proc_disconnectsignal_compat(ps, p);
2512 break;
2513
2514 case USBDEVFS_SUBMITURB32:
2515 snoop(&dev->dev, "%s: SUBMITURB32\n", __func__);
2516 ret = proc_submiturb_compat(ps, p);
2517 if (ret >= 0)
2518 inode->i_mtime = current_time(inode);
2519 break;
2520
2521 case USBDEVFS_IOCTL32:
2522 snoop(&dev->dev, "%s: IOCTL32\n", __func__);
2523 ret = proc_ioctl_compat(ps, ptr_to_compat(p));
2524 break;
2525#endif
2526
2527 case USBDEVFS_DISCARDURB:
2528 snoop(&dev->dev, "%s: DISCARDURB %pK\n", __func__, p);
2529 ret = proc_unlinkurb(ps, p);
2530 break;
2531
2532 case USBDEVFS_DISCSIGNAL:
2533 snoop(&dev->dev, "%s: DISCSIGNAL\n", __func__);
2534 ret = proc_disconnectsignal(ps, p);
2535 break;
2536
2537 case USBDEVFS_CLAIMINTERFACE:
2538 snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __func__);
2539 ret = proc_claiminterface(ps, p);
2540 break;
2541
2542 case USBDEVFS_RELEASEINTERFACE:
2543 snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __func__);
2544 ret = proc_releaseinterface(ps, p);
2545 break;
2546
2547 case USBDEVFS_IOCTL:
2548 snoop(&dev->dev, "%s: IOCTL\n", __func__);
2549 ret = proc_ioctl_default(ps, p);
2550 break;
2551
2552 case USBDEVFS_CLAIM_PORT:
2553 snoop(&dev->dev, "%s: CLAIM_PORT\n", __func__);
2554 ret = proc_claim_port(ps, p);
2555 break;
2556
2557 case USBDEVFS_RELEASE_PORT:
2558 snoop(&dev->dev, "%s: RELEASE_PORT\n", __func__);
2559 ret = proc_release_port(ps, p);
2560 break;
2561 case USBDEVFS_GET_CAPABILITIES:
2562 ret = proc_get_capabilities(ps, p);
2563 break;
2564 case USBDEVFS_DISCONNECT_CLAIM:
2565 ret = proc_disconnect_claim(ps, p);
2566 break;
2567 case USBDEVFS_ALLOC_STREAMS:
2568 ret = proc_alloc_streams(ps, p);
2569 break;
2570 case USBDEVFS_FREE_STREAMS:
2571 ret = proc_free_streams(ps, p);
2572 break;
2573 case USBDEVFS_DROP_PRIVILEGES:
2574 ret = proc_drop_privileges(ps, p);
2575 break;
2576 case USBDEVFS_GET_SPEED:
2577 ret = ps->dev->speed;
2578 break;
2579 }
2580
2581
2582 switch (cmd & ~IOCSIZE_MASK) {
2583 case USBDEVFS_CONNINFO_EX(0):
2584 ret = proc_conninfo_ex(ps, p, _IOC_SIZE(cmd));
2585 break;
2586 }
2587
2588 done:
2589 usb_unlock_device(dev);
2590 if (ret >= 0)
2591 inode->i_atime = current_time(inode);
2592 return ret;
2593}
2594
2595static long usbdev_ioctl(struct file *file, unsigned int cmd,
2596 unsigned long arg)
2597{
2598 int ret;
2599
2600 ret = usbdev_do_ioctl(file, cmd, (void __user *)arg);
2601
2602 return ret;
2603}
2604
2605#ifdef CONFIG_COMPAT
2606static long usbdev_compat_ioctl(struct file *file, unsigned int cmd,
2607 unsigned long arg)
2608{
2609 int ret;
2610
2611 ret = usbdev_do_ioctl(file, cmd, compat_ptr(arg));
2612
2613 return ret;
2614}
2615#endif
2616
2617
2618static __poll_t usbdev_poll(struct file *file,
2619 struct poll_table_struct *wait)
2620{
2621 struct usb_dev_state *ps = file->private_data;
2622 __poll_t mask = 0;
2623
2624 poll_wait(file, &ps->wait, wait);
2625 if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed))
2626 mask |= EPOLLOUT | EPOLLWRNORM;
2627 if (!connected(ps))
2628 mask |= EPOLLHUP;
2629 if (list_empty(&ps->list))
2630 mask |= EPOLLERR;
2631 return mask;
2632}
2633
2634const struct file_operations usbdev_file_operations = {
2635 .owner = THIS_MODULE,
2636 .llseek = no_seek_end_llseek,
2637 .read = usbdev_read,
2638 .poll = usbdev_poll,
2639 .unlocked_ioctl = usbdev_ioctl,
2640#ifdef CONFIG_COMPAT
2641 .compat_ioctl = usbdev_compat_ioctl,
2642#endif
2643 .mmap = usbdev_mmap,
2644 .open = usbdev_open,
2645 .release = usbdev_release,
2646};
2647
2648static void usbdev_remove(struct usb_device *udev)
2649{
2650 struct usb_dev_state *ps;
2651
2652 while (!list_empty(&udev->filelist)) {
2653 ps = list_entry(udev->filelist.next, struct usb_dev_state, list);
2654 destroy_all_async(ps);
2655 wake_up_all(&ps->wait);
2656 list_del_init(&ps->list);
2657 if (ps->discsignr)
2658 kill_pid_usb_asyncio(ps->discsignr, EPIPE, ps->disccontext,
2659 ps->disc_pid, ps->cred);
2660 }
2661}
2662
2663static int usbdev_notify(struct notifier_block *self,
2664 unsigned long action, void *dev)
2665{
2666 switch (action) {
2667 case USB_DEVICE_ADD:
2668 break;
2669 case USB_DEVICE_REMOVE:
2670 usbdev_remove(dev);
2671 break;
2672 }
2673 return NOTIFY_OK;
2674}
2675
2676static struct notifier_block usbdev_nb = {
2677 .notifier_call = usbdev_notify,
2678};
2679
2680static struct cdev usb_device_cdev;
2681
2682int __init usb_devio_init(void)
2683{
2684 int retval;
2685
2686 retval = register_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX,
2687 "usb_device");
2688 if (retval) {
2689 printk(KERN_ERR "Unable to register minors for usb_device\n");
2690 goto out;
2691 }
2692 cdev_init(&usb_device_cdev, &usbdev_file_operations);
2693 retval = cdev_add(&usb_device_cdev, USB_DEVICE_DEV, USB_DEVICE_MAX);
2694 if (retval) {
2695 printk(KERN_ERR "Unable to get usb_device major %d\n",
2696 USB_DEVICE_MAJOR);
2697 goto error_cdev;
2698 }
2699 usb_register_notify(&usbdev_nb);
2700out:
2701 return retval;
2702
2703error_cdev:
2704 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
2705 goto out;
2706}
2707
2708void usb_devio_cleanup(void)
2709{
2710 usb_unregister_notify(&usbdev_nb);
2711 cdev_del(&usb_device_cdev);
2712 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
2713}
2714