1 /*****************************************************************************/
4 * devio.c -- User space communication with USB devices.
6 * Copyright (C) 1999-2000 Thomas Sailer (sailer@ife.ee.ethz.ch)
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.
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.
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.
22 * This file implements the usbfs/x/y files, where
23 * x is the bus number and y the device number.
25 * It allows user space programs/"drivers" to communicate directly
26 * with USB devices without intervening kernel driver.
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
35 /*****************************************************************************/
39 #include <linux/slab.h>
40 #include <linux/signal.h>
41 #include <linux/poll.h>
42 #include <linux/module.h>
43 #include <linux/string.h>
44 #include <linux/usb.h>
45 #include <linux/usbdevice_fs.h>
46 #include <linux/usb/hcd.h> /* for usbcore internals */
47 #include <linux/cdev.h>
48 #include <linux/notifier.h>
49 #include <linux/security.h>
50 #include <linux/user_namespace.h>
51 #include <linux/scatterlist.h>
52 #include <linux/uaccess.h>
53 #include <asm/byteorder.h>
54 #include <linux/moduleparam.h>
59 #define USB_DEVICE_MAX (USB_MAXBUS * 128)
60 #define USB_SG_SIZE 16384 /* split-size for large txs */
62 /* Mutual exclusion for removal, open, and release */
63 DEFINE_MUTEX(usbfs_mutex
);
65 struct usb_dev_state
{
66 struct list_head list
; /* state list */
67 struct usb_device
*dev
;
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
;
75 const struct cred
*cred
;
76 void __user
*disccontext
;
77 unsigned long ifclaimed
;
79 u32 disabled_bulk_eps
;
83 struct list_head asynclist
;
84 struct usb_dev_state
*ps
;
86 const struct cred
*cred
;
89 void __user
*userbuffer
;
92 unsigned int mem_usage
;
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");
103 #define snoop(dev, format, arg...) \
106 dev_info(dev , format , ## arg); \
113 #define USB_DEVICE_DEV MKDEV(USB_DEVICE_MAJOR, 0)
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)");
121 /* Hard limit, necessary to avoid arithmetic overflow */
122 #define USBFS_XFER_MAX (UINT_MAX / 2 - 1000000)
124 static atomic_t usbfs_memory_usage
; /* Total memory currently allocated */
126 /* Check whether it's okay to allocate more memory for a transfer */
127 static int usbfs_increase_memory_usage(unsigned amount
)
132 * Convert usbfs_memory_mb to bytes, avoiding overflows.
133 * 0 means use the hard limit (effectively unlimited).
135 lim
= ACCESS_ONCE(usbfs_memory_mb
);
136 if (lim
== 0 || lim
> (USBFS_XFER_MAX
>> 20))
137 lim
= USBFS_XFER_MAX
;
141 atomic_add(amount
, &usbfs_memory_usage
);
142 if (atomic_read(&usbfs_memory_usage
) <= lim
)
144 atomic_sub(amount
, &usbfs_memory_usage
);
148 /* Memory for a transfer is being deallocated */
149 static void usbfs_decrease_memory_usage(unsigned amount
)
151 atomic_sub(amount
, &usbfs_memory_usage
);
154 static int connected(struct usb_dev_state
*ps
)
156 return (!list_empty(&ps
->list
) &&
157 ps
->dev
->state
!= USB_STATE_NOTATTACHED
);
160 static loff_t
usbdev_lseek(struct file
*file
, loff_t offset
, int orig
)
164 mutex_lock(&file_inode(file
)->i_mutex
);
168 file
->f_pos
= offset
;
172 file
->f_pos
+= offset
;
180 mutex_unlock(&file_inode(file
)->i_mutex
);
184 static ssize_t
usbdev_read(struct file
*file
, char __user
*buf
, size_t nbytes
,
187 struct usb_dev_state
*ps
= file
->private_data
;
188 struct usb_device
*dev
= ps
->dev
;
195 usb_lock_device(dev
);
196 if (!connected(ps
)) {
199 } else if (pos
< 0) {
204 if (pos
< sizeof(struct usb_device_descriptor
)) {
205 /* 18 bytes - fits on the stack */
206 struct usb_device_descriptor temp_desc
;
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
);
214 len
= sizeof(struct usb_device_descriptor
) - pos
;
217 if (copy_to_user(buf
, ((char *)&temp_desc
) + pos
, len
)) {
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
);
234 if (*ppos
< pos
+ length
) {
236 /* The descriptor may claim to be longer than it
237 * really is. Here is the actual allocated length. */
239 le16_to_cpu(dev
->config
[i
].desc
.wTotalLength
);
241 len
= length
- (*ppos
- pos
);
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
))) {
266 usb_unlock_device(dev
);
271 * async list handling
274 static struct async
*alloc_async(unsigned int numisoframes
)
278 as
= kzalloc(sizeof(struct async
), GFP_KERNEL
);
281 as
->urb
= usb_alloc_urb(numisoframes
, GFP_KERNEL
);
289 static void free_async(struct async
*as
)
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
]));
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
);
308 static void async_newpending(struct async
*as
)
310 struct usb_dev_state
*ps
= as
->ps
;
313 spin_lock_irqsave(&ps
->lock
, flags
);
314 list_add_tail(&as
->asynclist
, &ps
->async_pending
);
315 spin_unlock_irqrestore(&ps
->lock
, flags
);
318 static void async_removepending(struct async
*as
)
320 struct usb_dev_state
*ps
= as
->ps
;
323 spin_lock_irqsave(&ps
->lock
, flags
);
324 list_del_init(&as
->asynclist
);
325 spin_unlock_irqrestore(&ps
->lock
, flags
);
328 static struct async
*async_getcompleted(struct usb_dev_state
*ps
)
331 struct async
*as
= NULL
;
333 spin_lock_irqsave(&ps
->lock
, flags
);
334 if (!list_empty(&ps
->async_completed
)) {
335 as
= list_entry(ps
->async_completed
.next
, struct async
,
337 list_del_init(&as
->asynclist
);
339 spin_unlock_irqrestore(&ps
->lock
, flags
);
343 static struct async
*async_getpending(struct usb_dev_state
*ps
,
344 void __user
*userurb
)
348 list_for_each_entry(as
, &ps
->async_pending
, asynclist
)
349 if (as
->userurb
== userurb
) {
350 list_del_init(&as
->asynclist
);
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
)
362 static const char *types
[] = {"isoc", "int", "ctrl", "bulk"};
363 static const char *dirs
[] = {"out", "in"};
370 ep
= usb_pipeendpoint(pipe
);
371 t
= types
[usb_pipetype(pipe
)];
372 d
= dirs
[!!usb_pipein(pipe
)];
374 if (userurb
) { /* Async */
376 dev_info(&udev
->dev
, "userurb %p, ep%d %s-%s, "
378 userurb
, ep
, t
, d
, length
);
380 dev_info(&udev
->dev
, "userurb %p, ep%d %s-%s, "
381 "actual_length %u status %d\n",
382 userurb
, ep
, t
, d
, length
,
386 dev_info(&udev
->dev
, "ep%d %s-%s, length %u, "
388 ep
, t
, d
, length
, timeout_or_status
);
390 dev_info(&udev
->dev
, "ep%d %s-%s, actual_length %u, "
392 ep
, t
, d
, length
, timeout_or_status
);
395 if (data
&& data_len
> 0) {
396 print_hex_dump(KERN_DEBUG
, "data: ", DUMP_PREFIX_NONE
, 32, 1,
401 static void snoop_urb_data(struct urb
*urb
, unsigned len
)
408 if (urb
->num_sgs
== 0) {
409 print_hex_dump(KERN_DEBUG
, "data: ", DUMP_PREFIX_NONE
, 32, 1,
410 urb
->transfer_buffer
, len
, 1);
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);
422 static int copy_urb_data_to_user(u8 __user
*userbuffer
, struct urb
*urb
)
424 unsigned i
, len
, size
;
426 if (urb
->number_of_packets
> 0) /* Isochronous */
427 len
= urb
->transfer_buffer_length
;
429 len
= urb
->actual_length
;
431 if (urb
->num_sgs
== 0) {
432 if (copy_to_user(userbuffer
, urb
->transfer_buffer
, len
))
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
))
448 #define AS_CONTINUATION 1
451 static void cancel_bulk_urbs(struct usb_dev_state
*ps
, unsigned bulk_addr
)
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.
463 list_for_each_entry(as
, &ps
->async_pending
, asynclist
) {
464 if (as
->bulk_addr
== bulk_addr
) {
465 if (as
->bulk_status
!= AS_CONTINUATION
)
467 as
->bulk_status
= AS_UNLINK
;
471 ps
->disabled_bulk_eps
|= (1 << bulk_addr
);
473 /* Now carefully unlink all the marked pending URBs */
475 list_for_each_entry(as
, &ps
->async_pending
, asynclist
) {
476 if (as
->bulk_status
== AS_UNLINK
) {
477 as
->bulk_status
= 0; /* Only once */
480 spin_unlock(&ps
->lock
); /* Allow completions */
483 spin_lock(&ps
->lock
);
489 static void async_completed(struct urb
*urb
)
491 struct async
*as
= urb
->context
;
492 struct usb_dev_state
*ps
= as
->ps
;
493 struct siginfo sinfo
;
494 struct pid
*pid
= NULL
;
496 const struct cred
*cred
= NULL
;
499 spin_lock(&ps
->lock
);
500 list_move_tail(&as
->asynclist
, &ps
->async_completed
);
501 as
->status
= urb
->status
;
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
);
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
);
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
);
524 kill_pid_info_as_cred(sinfo
.si_signo
, &sinfo
, pid
, cred
, secid
);
532 static void destroy_async(struct usb_dev_state
*ps
, struct list_head
*list
)
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
);
545 /* drop the spinlock so the completion handler can run */
546 spin_unlock_irqrestore(&ps
->lock
, flags
);
549 spin_lock_irqsave(&ps
->lock
, flags
);
551 spin_unlock_irqrestore(&ps
->lock
, flags
);
554 static void destroy_async_on_interface(struct usb_dev_state
*ps
,
557 struct list_head
*p
, *q
, hitlist
;
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
);
569 static void destroy_all_async(struct usb_dev_state
*ps
)
571 destroy_async(ps
, &ps
->async_pending
);
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.
580 static int driver_probe(struct usb_interface
*intf
,
581 const struct usb_device_id
*id
)
586 static void driver_disconnect(struct usb_interface
*intf
)
588 struct usb_dev_state
*ps
= usb_get_intfdata(intf
);
589 unsigned int ifnum
= intf
->altsetting
->desc
.bInterfaceNumber
;
594 /* NOTE: this relies on usbcore having canceled and completed
595 * all pending I/O requests; 2.6 does that.
598 if (likely(ifnum
< 8*sizeof(ps
->ifclaimed
)))
599 clear_bit(ifnum
, &ps
->ifclaimed
);
601 dev_warn(&intf
->dev
, "interface number %u out of range\n",
604 usb_set_intfdata(intf
, NULL
);
606 /* force async requests to complete */
607 destroy_async_on_interface(ps
, ifnum
);
610 /* The following routines are merely placeholders. There is no way
611 * to inform a user task about suspend or resumes.
613 static int driver_suspend(struct usb_interface
*intf
, pm_message_t msg
)
618 static int driver_resume(struct usb_interface
*intf
)
623 struct usb_driver usbfs_driver
= {
625 .probe
= driver_probe
,
626 .disconnect
= driver_disconnect
,
627 .suspend
= driver_suspend
,
628 .resume
= driver_resume
,
631 static int claimintf(struct usb_dev_state
*ps
, unsigned int ifnum
)
633 struct usb_device
*dev
= ps
->dev
;
634 struct usb_interface
*intf
;
637 if (ifnum
>= 8*sizeof(ps
->ifclaimed
))
639 /* already claimed */
640 if (test_bit(ifnum
, &ps
->ifclaimed
))
643 intf
= usb_ifnum_to_if(dev
, ifnum
);
647 err
= usb_driver_claim_interface(&usbfs_driver
, intf
, ps
);
649 set_bit(ifnum
, &ps
->ifclaimed
);
653 static int releaseintf(struct usb_dev_state
*ps
, unsigned int ifnum
)
655 struct usb_device
*dev
;
656 struct usb_interface
*intf
;
660 if (ifnum
>= 8*sizeof(ps
->ifclaimed
))
663 intf
= usb_ifnum_to_if(dev
, ifnum
);
666 else if (test_and_clear_bit(ifnum
, &ps
->ifclaimed
)) {
667 usb_driver_release_interface(&usbfs_driver
, intf
);
673 static int checkintf(struct usb_dev_state
*ps
, unsigned int ifnum
)
675 if (ps
->dev
->state
!= USB_STATE_CONFIGURED
)
676 return -EHOSTUNREACH
;
677 if (ifnum
>= 8*sizeof(ps
->ifclaimed
))
679 if (test_bit(ifnum
, &ps
->ifclaimed
))
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
);
688 static int findintfep(struct usb_device
*dev
, unsigned int ep
)
690 unsigned int i
, j
, e
;
691 struct usb_interface
*intf
;
692 struct usb_host_interface
*alts
;
693 struct usb_endpoint_descriptor
*endpt
;
695 if (ep
& ~(USB_DIR_IN
|0xf))
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
;
713 static int check_ctrlrecip(struct usb_dev_state
*ps
, unsigned int requesttype
,
714 unsigned int request
, unsigned int index
)
717 struct usb_host_interface
*alt_setting
;
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
))
727 * check for the special corner case 'get_device_id' in the printer
728 * class specification, which we always want to allow as it is used
729 * to query things like ink level, etc.
731 if (requesttype
== 0xa1 && request
== 0) {
732 alt_setting
= usb_find_alt_setting(ps
->dev
->actconfig
,
733 index
>> 8, index
& 0xff);
735 && alt_setting
->desc
.bInterfaceClass
== USB_CLASS_PRINTER
)
740 switch (requesttype
& USB_RECIP_MASK
) {
741 case USB_RECIP_ENDPOINT
:
742 if ((index
& ~USB_DIR_IN
) == 0)
744 ret
= findintfep(ps
->dev
, index
);
747 * Some not fully compliant Win apps seem to get
748 * index wrong and have the endpoint number here
749 * rather than the endpoint address (with the
750 * correct direction). Win does let this through,
751 * so we'll not reject it here but leave it to
752 * the device to not break KVM. But we warn.
754 ret
= findintfep(ps
->dev
, index
^ 0x80);
756 dev_info(&ps
->dev
->dev
,
757 "%s: process %i (%s) requesting ep %02x but needs %02x\n",
758 __func__
, task_pid_nr(current
),
759 current
->comm
, index
, index
^ 0x80);
762 ret
= checkintf(ps
, ret
);
765 case USB_RECIP_INTERFACE
:
766 ret
= checkintf(ps
, index
);
772 static struct usb_host_endpoint
*ep_to_host_endpoint(struct usb_device
*dev
,
775 if (ep
& USB_ENDPOINT_DIR_MASK
)
776 return dev
->ep_in
[ep
& USB_ENDPOINT_NUMBER_MASK
];
778 return dev
->ep_out
[ep
& USB_ENDPOINT_NUMBER_MASK
];
781 static int parse_usbdevfs_streams(struct usb_dev_state
*ps
,
782 struct usbdevfs_streams __user
*streams
,
783 unsigned int *num_streams_ret
,
784 unsigned int *num_eps_ret
,
785 struct usb_host_endpoint
***eps_ret
,
786 struct usb_interface
**intf_ret
)
788 unsigned int i
, num_streams
, num_eps
;
789 struct usb_host_endpoint
**eps
;
790 struct usb_interface
*intf
= NULL
;
794 if (get_user(num_streams
, &streams
->num_streams
) ||
795 get_user(num_eps
, &streams
->num_eps
))
798 if (num_eps
< 1 || num_eps
> USB_MAXENDPOINTS
)
801 /* The XHCI controller allows max 2 ^ 16 streams */
802 if (num_streams_ret
&& (num_streams
< 2 || num_streams
> 65536))
805 eps
= kmalloc(num_eps
* sizeof(*eps
), GFP_KERNEL
);
809 for (i
= 0; i
< num_eps
; i
++) {
810 if (get_user(ep
, &streams
->eps
[i
])) {
814 eps
[i
] = ep_to_host_endpoint(ps
->dev
, ep
);
820 /* usb_alloc/free_streams operate on an usb_interface */
821 ifnum
= findintfep(ps
->dev
, ep
);
828 ret
= checkintf(ps
, ifnum
);
831 intf
= usb_ifnum_to_if(ps
->dev
, ifnum
);
833 /* Verify all eps belong to the same interface */
834 if (ifnum
!= intf
->altsetting
->desc
.bInterfaceNumber
) {
842 *num_streams_ret
= num_streams
;
843 *num_eps_ret
= num_eps
;
854 static int match_devt(struct device
*dev
, void *data
)
856 return dev
->devt
== (dev_t
) (unsigned long) data
;
859 static struct usb_device
*usbdev_lookup_by_devt(dev_t devt
)
863 dev
= bus_find_device(&usb_bus_type
, NULL
,
864 (void *) (unsigned long) devt
, match_devt
);
867 return container_of(dev
, struct usb_device
, dev
);
873 static int usbdev_open(struct inode
*inode
, struct file
*file
)
875 struct usb_device
*dev
= NULL
;
876 struct usb_dev_state
*ps
;
880 ps
= kmalloc(sizeof(struct usb_dev_state
), GFP_KERNEL
);
886 /* Protect against simultaneous removal or release */
887 mutex_lock(&usbfs_mutex
);
889 /* usbdev device-node */
890 if (imajor(inode
) == USB_DEVICE_MAJOR
)
891 dev
= usbdev_lookup_by_devt(inode
->i_rdev
);
893 mutex_unlock(&usbfs_mutex
);
898 usb_lock_device(dev
);
899 if (dev
->state
== USB_STATE_NOTATTACHED
)
900 goto out_unlock_device
;
902 ret
= usb_autoresume_device(dev
);
904 goto out_unlock_device
;
908 spin_lock_init(&ps
->lock
);
909 INIT_LIST_HEAD(&ps
->list
);
910 INIT_LIST_HEAD(&ps
->async_pending
);
911 INIT_LIST_HEAD(&ps
->async_completed
);
912 init_waitqueue_head(&ps
->wait
);
914 ps
->disc_pid
= get_pid(task_pid(current
));
915 ps
->cred
= get_current_cred();
916 ps
->disccontext
= NULL
;
918 security_task_getsecid(current
, &ps
->secid
);
920 list_add_tail(&ps
->list
, &dev
->filelist
);
921 file
->private_data
= ps
;
922 usb_unlock_device(dev
);
923 snoop(&dev
->dev
, "opened by process %d: %s\n", task_pid_nr(current
),
928 usb_unlock_device(dev
);
935 static int usbdev_release(struct inode
*inode
, struct file
*file
)
937 struct usb_dev_state
*ps
= file
->private_data
;
938 struct usb_device
*dev
= ps
->dev
;
942 usb_lock_device(dev
);
943 usb_hub_release_all_ports(dev
, ps
);
945 list_del_init(&ps
->list
);
947 for (ifnum
= 0; ps
->ifclaimed
&& ifnum
< 8*sizeof(ps
->ifclaimed
);
949 if (test_bit(ifnum
, &ps
->ifclaimed
))
950 releaseintf(ps
, ifnum
);
952 destroy_all_async(ps
);
953 usb_autosuspend_device(dev
);
954 usb_unlock_device(dev
);
956 put_pid(ps
->disc_pid
);
959 as
= async_getcompleted(ps
);
962 as
= async_getcompleted(ps
);
968 static int proc_control(struct usb_dev_state
*ps
, void __user
*arg
)
970 struct usb_device
*dev
= ps
->dev
;
971 struct usbdevfs_ctrltransfer ctrl
;
977 if (copy_from_user(&ctrl
, arg
, sizeof(ctrl
)))
979 ret
= check_ctrlrecip(ps
, ctrl
.bRequestType
, ctrl
.bRequest
,
983 wLength
= ctrl
.wLength
; /* To suppress 64k PAGE_SIZE warning */
984 if (wLength
> PAGE_SIZE
)
986 ret
= usbfs_increase_memory_usage(PAGE_SIZE
+ sizeof(struct urb
) +
987 sizeof(struct usb_ctrlrequest
));
990 tbuf
= (unsigned char *)__get_free_page(GFP_KERNEL
);
996 snoop(&dev
->dev
, "control urb: bRequestType=%02x "
997 "bRequest=%02x wValue=%04x "
998 "wIndex=%04x wLength=%04x\n",
999 ctrl
.bRequestType
, ctrl
.bRequest
, ctrl
.wValue
,
1000 ctrl
.wIndex
, ctrl
.wLength
);
1001 if (ctrl
.bRequestType
& 0x80) {
1002 if (ctrl
.wLength
&& !access_ok(VERIFY_WRITE
, ctrl
.data
,
1007 pipe
= usb_rcvctrlpipe(dev
, 0);
1008 snoop_urb(dev
, NULL
, pipe
, ctrl
.wLength
, tmo
, SUBMIT
, NULL
, 0);
1010 usb_unlock_device(dev
);
1011 i
= usb_control_msg(dev
, pipe
, ctrl
.bRequest
,
1012 ctrl
.bRequestType
, ctrl
.wValue
, ctrl
.wIndex
,
1013 tbuf
, ctrl
.wLength
, tmo
);
1014 usb_lock_device(dev
);
1015 snoop_urb(dev
, NULL
, pipe
, max(i
, 0), min(i
, 0), COMPLETE
,
1017 if ((i
> 0) && ctrl
.wLength
) {
1018 if (copy_to_user(ctrl
.data
, tbuf
, i
)) {
1025 if (copy_from_user(tbuf
, ctrl
.data
, ctrl
.wLength
)) {
1030 pipe
= usb_sndctrlpipe(dev
, 0);
1031 snoop_urb(dev
, NULL
, pipe
, ctrl
.wLength
, tmo
, SUBMIT
,
1032 tbuf
, ctrl
.wLength
);
1034 usb_unlock_device(dev
);
1035 i
= usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0), ctrl
.bRequest
,
1036 ctrl
.bRequestType
, ctrl
.wValue
, ctrl
.wIndex
,
1037 tbuf
, ctrl
.wLength
, tmo
);
1038 usb_lock_device(dev
);
1039 snoop_urb(dev
, NULL
, pipe
, max(i
, 0), min(i
, 0), COMPLETE
, NULL
, 0);
1041 if (i
< 0 && i
!= -EPIPE
) {
1042 dev_printk(KERN_DEBUG
, &dev
->dev
, "usbfs: USBDEVFS_CONTROL "
1043 "failed cmd %s rqt %u rq %u len %u ret %d\n",
1044 current
->comm
, ctrl
.bRequestType
, ctrl
.bRequest
,
1049 free_page((unsigned long) tbuf
);
1050 usbfs_decrease_memory_usage(PAGE_SIZE
+ sizeof(struct urb
) +
1051 sizeof(struct usb_ctrlrequest
));
1055 static int proc_bulk(struct usb_dev_state
*ps
, void __user
*arg
)
1057 struct usb_device
*dev
= ps
->dev
;
1058 struct usbdevfs_bulktransfer bulk
;
1059 unsigned int tmo
, len1
, pipe
;
1061 unsigned char *tbuf
;
1064 if (copy_from_user(&bulk
, arg
, sizeof(bulk
)))
1066 ret
= findintfep(ps
->dev
, bulk
.ep
);
1069 ret
= checkintf(ps
, ret
);
1072 if (bulk
.ep
& USB_DIR_IN
)
1073 pipe
= usb_rcvbulkpipe(dev
, bulk
.ep
& 0x7f);
1075 pipe
= usb_sndbulkpipe(dev
, bulk
.ep
& 0x7f);
1076 if (!usb_maxpacket(dev
, pipe
, !(bulk
.ep
& USB_DIR_IN
)))
1079 if (len1
>= USBFS_XFER_MAX
)
1081 ret
= usbfs_increase_memory_usage(len1
+ sizeof(struct urb
));
1084 if (!(tbuf
= kmalloc(len1
, GFP_KERNEL
))) {
1089 if (bulk
.ep
& 0x80) {
1090 if (len1
&& !access_ok(VERIFY_WRITE
, bulk
.data
, len1
)) {
1094 snoop_urb(dev
, NULL
, pipe
, len1
, tmo
, SUBMIT
, NULL
, 0);
1096 usb_unlock_device(dev
);
1097 i
= usb_bulk_msg(dev
, pipe
, tbuf
, len1
, &len2
, tmo
);
1098 usb_lock_device(dev
);
1099 snoop_urb(dev
, NULL
, pipe
, len2
, i
, COMPLETE
, tbuf
, len2
);
1102 if (copy_to_user(bulk
.data
, tbuf
, len2
)) {
1109 if (copy_from_user(tbuf
, bulk
.data
, len1
)) {
1114 snoop_urb(dev
, NULL
, pipe
, len1
, tmo
, SUBMIT
, tbuf
, len1
);
1116 usb_unlock_device(dev
);
1117 i
= usb_bulk_msg(dev
, pipe
, tbuf
, len1
, &len2
, tmo
);
1118 usb_lock_device(dev
);
1119 snoop_urb(dev
, NULL
, pipe
, len2
, i
, COMPLETE
, NULL
, 0);
1121 ret
= (i
< 0 ? i
: len2
);
1124 usbfs_decrease_memory_usage(len1
+ sizeof(struct urb
));
1128 static void check_reset_of_active_ep(struct usb_device
*udev
,
1129 unsigned int epnum
, char *ioctl_name
)
1131 struct usb_host_endpoint
**eps
;
1132 struct usb_host_endpoint
*ep
;
1134 eps
= (epnum
& USB_DIR_IN
) ? udev
->ep_in
: udev
->ep_out
;
1135 ep
= eps
[epnum
& 0x0f];
1136 if (ep
&& !list_empty(&ep
->urb_list
))
1137 dev_warn(&udev
->dev
, "Process %d (%s) called USBDEVFS_%s for active endpoint 0x%02x\n",
1138 task_pid_nr(current
), current
->comm
,
1142 static int proc_resetep(struct usb_dev_state
*ps
, void __user
*arg
)
1147 if (get_user(ep
, (unsigned int __user
*)arg
))
1149 ret
= findintfep(ps
->dev
, ep
);
1152 ret
= checkintf(ps
, ret
);
1155 check_reset_of_active_ep(ps
->dev
, ep
, "RESETEP");
1156 usb_reset_endpoint(ps
->dev
, ep
);
1160 static int proc_clearhalt(struct usb_dev_state
*ps
, void __user
*arg
)
1166 if (get_user(ep
, (unsigned int __user
*)arg
))
1168 ret
= findintfep(ps
->dev
, ep
);
1171 ret
= checkintf(ps
, ret
);
1174 check_reset_of_active_ep(ps
->dev
, ep
, "CLEAR_HALT");
1175 if (ep
& USB_DIR_IN
)
1176 pipe
= usb_rcvbulkpipe(ps
->dev
, ep
& 0x7f);
1178 pipe
= usb_sndbulkpipe(ps
->dev
, ep
& 0x7f);
1180 return usb_clear_halt(ps
->dev
, pipe
);
1183 static int proc_getdriver(struct usb_dev_state
*ps
, void __user
*arg
)
1185 struct usbdevfs_getdriver gd
;
1186 struct usb_interface
*intf
;
1189 if (copy_from_user(&gd
, arg
, sizeof(gd
)))
1191 intf
= usb_ifnum_to_if(ps
->dev
, gd
.interface
);
1192 if (!intf
|| !intf
->dev
.driver
)
1195 strlcpy(gd
.driver
, intf
->dev
.driver
->name
,
1197 ret
= (copy_to_user(arg
, &gd
, sizeof(gd
)) ? -EFAULT
: 0);
1202 static int proc_connectinfo(struct usb_dev_state
*ps
, void __user
*arg
)
1204 struct usbdevfs_connectinfo ci
= {
1205 .devnum
= ps
->dev
->devnum
,
1206 .slow
= ps
->dev
->speed
== USB_SPEED_LOW
1209 if (copy_to_user(arg
, &ci
, sizeof(ci
)))
1214 static int proc_resetdevice(struct usb_dev_state
*ps
)
1216 return usb_reset_device(ps
->dev
);
1219 static int proc_setintf(struct usb_dev_state
*ps
, void __user
*arg
)
1221 struct usbdevfs_setinterface setintf
;
1224 if (copy_from_user(&setintf
, arg
, sizeof(setintf
)))
1226 if ((ret
= checkintf(ps
, setintf
.interface
)))
1229 destroy_async_on_interface(ps
, setintf
.interface
);
1231 return usb_set_interface(ps
->dev
, setintf
.interface
,
1232 setintf
.altsetting
);
1235 static int proc_setconfig(struct usb_dev_state
*ps
, void __user
*arg
)
1239 struct usb_host_config
*actconfig
;
1241 if (get_user(u
, (int __user
*)arg
))
1244 actconfig
= ps
->dev
->actconfig
;
1246 /* Don't touch the device if any interfaces are claimed.
1247 * It could interfere with other drivers' operations, and if
1248 * an interface is claimed by usbfs it could easily deadlock.
1253 for (i
= 0; i
< actconfig
->desc
.bNumInterfaces
; ++i
) {
1254 if (usb_interface_claimed(actconfig
->interface
[i
])) {
1255 dev_warn(&ps
->dev
->dev
,
1256 "usbfs: interface %d claimed by %s "
1257 "while '%s' sets config #%d\n",
1258 actconfig
->interface
[i
]
1260 ->desc
.bInterfaceNumber
,
1261 actconfig
->interface
[i
]
1270 /* SET_CONFIGURATION is often abused as a "cheap" driver reset,
1271 * so avoid usb_set_configuration()'s kick to sysfs
1274 if (actconfig
&& actconfig
->desc
.bConfigurationValue
== u
)
1275 status
= usb_reset_configuration(ps
->dev
);
1277 status
= usb_set_configuration(ps
->dev
, u
);
1283 static int proc_do_submiturb(struct usb_dev_state
*ps
, struct usbdevfs_urb
*uurb
,
1284 struct usbdevfs_iso_packet_desc __user
*iso_frame_desc
,
1287 struct usbdevfs_iso_packet_desc
*isopkt
= NULL
;
1288 struct usb_host_endpoint
*ep
;
1289 struct async
*as
= NULL
;
1290 struct usb_ctrlrequest
*dr
= NULL
;
1291 unsigned int u
, totlen
, isofrmlen
;
1292 int i
, ret
, is_in
, num_sgs
= 0, ifnum
= -1;
1293 int number_of_packets
= 0;
1294 unsigned int stream_id
= 0;
1297 if (uurb
->flags
& ~(USBDEVFS_URB_ISO_ASAP
|
1298 USBDEVFS_URB_SHORT_NOT_OK
|
1299 USBDEVFS_URB_BULK_CONTINUATION
|
1300 USBDEVFS_URB_NO_FSBR
|
1301 USBDEVFS_URB_ZERO_PACKET
|
1302 USBDEVFS_URB_NO_INTERRUPT
))
1304 if (uurb
->buffer_length
> 0 && !uurb
->buffer
)
1306 if (!(uurb
->type
== USBDEVFS_URB_TYPE_CONTROL
&&
1307 (uurb
->endpoint
& ~USB_ENDPOINT_DIR_MASK
) == 0)) {
1308 ifnum
= findintfep(ps
->dev
, uurb
->endpoint
);
1311 ret
= checkintf(ps
, ifnum
);
1315 ep
= ep_to_host_endpoint(ps
->dev
, uurb
->endpoint
);
1318 is_in
= (uurb
->endpoint
& USB_ENDPOINT_DIR_MASK
) != 0;
1321 switch(uurb
->type
) {
1322 case USBDEVFS_URB_TYPE_CONTROL
:
1323 if (!usb_endpoint_xfer_control(&ep
->desc
))
1325 /* min 8 byte setup packet */
1326 if (uurb
->buffer_length
< 8)
1328 dr
= kmalloc(sizeof(struct usb_ctrlrequest
), GFP_KERNEL
);
1331 if (copy_from_user(dr
, uurb
->buffer
, 8)) {
1335 if (uurb
->buffer_length
< (le16_to_cpup(&dr
->wLength
) + 8)) {
1339 ret
= check_ctrlrecip(ps
, dr
->bRequestType
, dr
->bRequest
,
1340 le16_to_cpup(&dr
->wIndex
));
1343 uurb
->buffer_length
= le16_to_cpup(&dr
->wLength
);
1345 if ((dr
->bRequestType
& USB_DIR_IN
) && uurb
->buffer_length
) {
1347 uurb
->endpoint
|= USB_DIR_IN
;
1350 uurb
->endpoint
&= ~USB_DIR_IN
;
1352 snoop(&ps
->dev
->dev
, "control urb: bRequestType=%02x "
1353 "bRequest=%02x wValue=%04x "
1354 "wIndex=%04x wLength=%04x\n",
1355 dr
->bRequestType
, dr
->bRequest
,
1356 __le16_to_cpup(&dr
->wValue
),
1357 __le16_to_cpup(&dr
->wIndex
),
1358 __le16_to_cpup(&dr
->wLength
));
1359 u
= sizeof(struct usb_ctrlrequest
);
1362 case USBDEVFS_URB_TYPE_BULK
:
1363 switch (usb_endpoint_type(&ep
->desc
)) {
1364 case USB_ENDPOINT_XFER_CONTROL
:
1365 case USB_ENDPOINT_XFER_ISOC
:
1367 case USB_ENDPOINT_XFER_INT
:
1368 /* allow single-shot interrupt transfers */
1369 uurb
->type
= USBDEVFS_URB_TYPE_INTERRUPT
;
1372 num_sgs
= DIV_ROUND_UP(uurb
->buffer_length
, USB_SG_SIZE
);
1373 if (num_sgs
== 1 || num_sgs
> ps
->dev
->bus
->sg_tablesize
)
1376 stream_id
= uurb
->stream_id
;
1379 case USBDEVFS_URB_TYPE_INTERRUPT
:
1380 if (!usb_endpoint_xfer_int(&ep
->desc
))
1385 case USBDEVFS_URB_TYPE_ISO
:
1386 /* arbitrary limit */
1387 if (uurb
->number_of_packets
< 1 ||
1388 uurb
->number_of_packets
> 128)
1390 if (!usb_endpoint_xfer_isoc(&ep
->desc
))
1392 number_of_packets
= uurb
->number_of_packets
;
1393 isofrmlen
= sizeof(struct usbdevfs_iso_packet_desc
) *
1395 if (!(isopkt
= kmalloc(isofrmlen
, GFP_KERNEL
)))
1397 if (copy_from_user(isopkt
, iso_frame_desc
, isofrmlen
)) {
1401 for (totlen
= u
= 0; u
< number_of_packets
; u
++) {
1403 * arbitrary limit need for USB 3.0
1404 * bMaxBurst (0~15 allowed, 1~16 packets)
1405 * bmAttributes (bit 1:0, mult 0~2, 1~3 packets)
1406 * sizemax: 1024 * 16 * 3 = 49152
1408 if (isopkt
[u
].length
> 49152) {
1412 totlen
+= isopkt
[u
].length
;
1414 u
*= sizeof(struct usb_iso_packet_descriptor
);
1415 uurb
->buffer_length
= totlen
;
1422 if (uurb
->buffer_length
>= USBFS_XFER_MAX
) {
1426 if (uurb
->buffer_length
> 0 &&
1427 !access_ok(is_in
? VERIFY_WRITE
: VERIFY_READ
,
1428 uurb
->buffer
, uurb
->buffer_length
)) {
1432 as
= alloc_async(number_of_packets
);
1438 u
+= sizeof(struct async
) + sizeof(struct urb
) + uurb
->buffer_length
+
1439 num_sgs
* sizeof(struct scatterlist
);
1440 ret
= usbfs_increase_memory_usage(u
);
1446 as
->urb
->sg
= kmalloc(num_sgs
* sizeof(struct scatterlist
),
1452 as
->urb
->num_sgs
= num_sgs
;
1453 sg_init_table(as
->urb
->sg
, as
->urb
->num_sgs
);
1455 totlen
= uurb
->buffer_length
;
1456 for (i
= 0; i
< as
->urb
->num_sgs
; i
++) {
1457 u
= (totlen
> USB_SG_SIZE
) ? USB_SG_SIZE
: totlen
;
1458 buf
= kmalloc(u
, GFP_KERNEL
);
1463 sg_set_buf(&as
->urb
->sg
[i
], buf
, u
);
1466 if (copy_from_user(buf
, uurb
->buffer
, u
)) {
1474 } else if (uurb
->buffer_length
> 0) {
1475 as
->urb
->transfer_buffer
= kmalloc(uurb
->buffer_length
,
1477 if (!as
->urb
->transfer_buffer
) {
1483 if (copy_from_user(as
->urb
->transfer_buffer
,
1485 uurb
->buffer_length
)) {
1489 } else if (uurb
->type
== USBDEVFS_URB_TYPE_ISO
) {
1491 * Isochronous input data may end up being
1492 * discontiguous if some of the packets are short.
1493 * Clear the buffer so that the gaps don't leak
1494 * kernel data to userspace.
1496 memset(as
->urb
->transfer_buffer
, 0,
1497 uurb
->buffer_length
);
1500 as
->urb
->dev
= ps
->dev
;
1501 as
->urb
->pipe
= (uurb
->type
<< 30) |
1502 __create_pipe(ps
->dev
, uurb
->endpoint
& 0xf) |
1503 (uurb
->endpoint
& USB_DIR_IN
);
1505 /* This tedious sequence is necessary because the URB_* flags
1506 * are internal to the kernel and subject to change, whereas
1507 * the USBDEVFS_URB_* flags are a user API and must not be changed.
1509 u
= (is_in
? URB_DIR_IN
: URB_DIR_OUT
);
1510 if (uurb
->flags
& USBDEVFS_URB_ISO_ASAP
)
1512 if (uurb
->flags
& USBDEVFS_URB_SHORT_NOT_OK
)
1513 u
|= URB_SHORT_NOT_OK
;
1514 if (uurb
->flags
& USBDEVFS_URB_NO_FSBR
)
1516 if (uurb
->flags
& USBDEVFS_URB_ZERO_PACKET
)
1517 u
|= URB_ZERO_PACKET
;
1518 if (uurb
->flags
& USBDEVFS_URB_NO_INTERRUPT
)
1519 u
|= URB_NO_INTERRUPT
;
1520 as
->urb
->transfer_flags
= u
;
1522 as
->urb
->transfer_buffer_length
= uurb
->buffer_length
;
1523 as
->urb
->setup_packet
= (unsigned char *)dr
;
1525 as
->urb
->start_frame
= uurb
->start_frame
;
1526 as
->urb
->number_of_packets
= number_of_packets
;
1527 as
->urb
->stream_id
= stream_id
;
1528 if (uurb
->type
== USBDEVFS_URB_TYPE_ISO
||
1529 ps
->dev
->speed
== USB_SPEED_HIGH
)
1530 as
->urb
->interval
= 1 << min(15, ep
->desc
.bInterval
- 1);
1532 as
->urb
->interval
= ep
->desc
.bInterval
;
1533 as
->urb
->context
= as
;
1534 as
->urb
->complete
= async_completed
;
1535 for (totlen
= u
= 0; u
< number_of_packets
; u
++) {
1536 as
->urb
->iso_frame_desc
[u
].offset
= totlen
;
1537 as
->urb
->iso_frame_desc
[u
].length
= isopkt
[u
].length
;
1538 totlen
+= isopkt
[u
].length
;
1544 if (is_in
&& uurb
->buffer_length
> 0)
1545 as
->userbuffer
= uurb
->buffer
;
1547 as
->userbuffer
= NULL
;
1548 as
->signr
= uurb
->signr
;
1550 as
->pid
= get_pid(task_pid(current
));
1551 as
->cred
= get_current_cred();
1552 security_task_getsecid(current
, &as
->secid
);
1553 snoop_urb(ps
->dev
, as
->userurb
, as
->urb
->pipe
,
1554 as
->urb
->transfer_buffer_length
, 0, SUBMIT
,
1557 snoop_urb_data(as
->urb
, as
->urb
->transfer_buffer_length
);
1559 async_newpending(as
);
1561 if (usb_endpoint_xfer_bulk(&ep
->desc
)) {
1562 spin_lock_irq(&ps
->lock
);
1564 /* Not exactly the endpoint address; the direction bit is
1565 * shifted to the 0x10 position so that the value will be
1568 as
->bulk_addr
= usb_endpoint_num(&ep
->desc
) |
1569 ((ep
->desc
.bEndpointAddress
& USB_ENDPOINT_DIR_MASK
)
1572 /* If this bulk URB is the start of a new transfer, re-enable
1573 * the endpoint. Otherwise mark it as a continuation URB.
1575 if (uurb
->flags
& USBDEVFS_URB_BULK_CONTINUATION
)
1576 as
->bulk_status
= AS_CONTINUATION
;
1578 ps
->disabled_bulk_eps
&= ~(1 << as
->bulk_addr
);
1580 /* Don't accept continuation URBs if the endpoint is
1581 * disabled because of an earlier error.
1583 if (ps
->disabled_bulk_eps
& (1 << as
->bulk_addr
))
1586 ret
= usb_submit_urb(as
->urb
, GFP_ATOMIC
);
1587 spin_unlock_irq(&ps
->lock
);
1589 ret
= usb_submit_urb(as
->urb
, GFP_KERNEL
);
1593 dev_printk(KERN_DEBUG
, &ps
->dev
->dev
,
1594 "usbfs: usb_submit_urb returned %d\n", ret
);
1595 snoop_urb(ps
->dev
, as
->userurb
, as
->urb
->pipe
,
1596 0, ret
, COMPLETE
, NULL
, 0);
1597 async_removepending(as
);
1610 static int proc_submiturb(struct usb_dev_state
*ps
, void __user
*arg
)
1612 struct usbdevfs_urb uurb
;
1614 if (copy_from_user(&uurb
, arg
, sizeof(uurb
)))
1617 return proc_do_submiturb(ps
, &uurb
,
1618 (((struct usbdevfs_urb __user
*)arg
)->iso_frame_desc
),
1622 static int proc_unlinkurb(struct usb_dev_state
*ps
, void __user
*arg
)
1626 unsigned long flags
;
1628 spin_lock_irqsave(&ps
->lock
, flags
);
1629 as
= async_getpending(ps
, arg
);
1631 spin_unlock_irqrestore(&ps
->lock
, flags
);
1637 spin_unlock_irqrestore(&ps
->lock
, flags
);
1645 static int processcompl(struct async
*as
, void __user
* __user
*arg
)
1647 struct urb
*urb
= as
->urb
;
1648 struct usbdevfs_urb __user
*userurb
= as
->userurb
;
1649 void __user
*addr
= as
->userurb
;
1652 if (as
->userbuffer
&& urb
->actual_length
) {
1653 if (copy_urb_data_to_user(as
->userbuffer
, urb
))
1656 if (put_user(as
->status
, &userurb
->status
))
1658 if (put_user(urb
->actual_length
, &userurb
->actual_length
))
1660 if (put_user(urb
->error_count
, &userurb
->error_count
))
1663 if (usb_endpoint_xfer_isoc(&urb
->ep
->desc
)) {
1664 for (i
= 0; i
< urb
->number_of_packets
; i
++) {
1665 if (put_user(urb
->iso_frame_desc
[i
].actual_length
,
1666 &userurb
->iso_frame_desc
[i
].actual_length
))
1668 if (put_user(urb
->iso_frame_desc
[i
].status
,
1669 &userurb
->iso_frame_desc
[i
].status
))
1674 if (put_user(addr
, (void __user
* __user
*)arg
))
1682 static struct async
*reap_as(struct usb_dev_state
*ps
)
1684 DECLARE_WAITQUEUE(wait
, current
);
1685 struct async
*as
= NULL
;
1686 struct usb_device
*dev
= ps
->dev
;
1688 add_wait_queue(&ps
->wait
, &wait
);
1690 __set_current_state(TASK_INTERRUPTIBLE
);
1691 as
= async_getcompleted(ps
);
1694 if (signal_pending(current
))
1696 usb_unlock_device(dev
);
1698 usb_lock_device(dev
);
1700 remove_wait_queue(&ps
->wait
, &wait
);
1701 set_current_state(TASK_RUNNING
);
1705 static int proc_reapurb(struct usb_dev_state
*ps
, void __user
*arg
)
1707 struct async
*as
= reap_as(ps
);
1709 int retval
= processcompl(as
, (void __user
* __user
*)arg
);
1713 if (signal_pending(current
))
1718 static int proc_reapurbnonblock(struct usb_dev_state
*ps
, void __user
*arg
)
1723 as
= async_getcompleted(ps
);
1726 retval
= processcompl(as
, (void __user
* __user
*)arg
);
1732 #ifdef CONFIG_COMPAT
1733 static int proc_control_compat(struct usb_dev_state
*ps
,
1734 struct usbdevfs_ctrltransfer32 __user
*p32
)
1736 struct usbdevfs_ctrltransfer __user
*p
;
1738 p
= compat_alloc_user_space(sizeof(*p
));
1739 if (copy_in_user(p
, p32
, (sizeof(*p32
) - sizeof(compat_caddr_t
))) ||
1740 get_user(udata
, &p32
->data
) ||
1741 put_user(compat_ptr(udata
), &p
->data
))
1743 return proc_control(ps
, p
);
1746 static int proc_bulk_compat(struct usb_dev_state
*ps
,
1747 struct usbdevfs_bulktransfer32 __user
*p32
)
1749 struct usbdevfs_bulktransfer __user
*p
;
1751 compat_caddr_t addr
;
1753 p
= compat_alloc_user_space(sizeof(*p
));
1755 if (get_user(n
, &p32
->ep
) || put_user(n
, &p
->ep
) ||
1756 get_user(n
, &p32
->len
) || put_user(n
, &p
->len
) ||
1757 get_user(n
, &p32
->timeout
) || put_user(n
, &p
->timeout
) ||
1758 get_user(addr
, &p32
->data
) || put_user(compat_ptr(addr
), &p
->data
))
1761 return proc_bulk(ps
, p
);
1763 static int proc_disconnectsignal_compat(struct usb_dev_state
*ps
, void __user
*arg
)
1765 struct usbdevfs_disconnectsignal32 ds
;
1767 if (copy_from_user(&ds
, arg
, sizeof(ds
)))
1769 ps
->discsignr
= ds
.signr
;
1770 ps
->disccontext
= compat_ptr(ds
.context
);
1774 static int get_urb32(struct usbdevfs_urb
*kurb
,
1775 struct usbdevfs_urb32 __user
*uurb
)
1778 if (!access_ok(VERIFY_READ
, uurb
, sizeof(*uurb
)) ||
1779 __get_user(kurb
->type
, &uurb
->type
) ||
1780 __get_user(kurb
->endpoint
, &uurb
->endpoint
) ||
1781 __get_user(kurb
->status
, &uurb
->status
) ||
1782 __get_user(kurb
->flags
, &uurb
->flags
) ||
1783 __get_user(kurb
->buffer_length
, &uurb
->buffer_length
) ||
1784 __get_user(kurb
->actual_length
, &uurb
->actual_length
) ||
1785 __get_user(kurb
->start_frame
, &uurb
->start_frame
) ||
1786 __get_user(kurb
->number_of_packets
, &uurb
->number_of_packets
) ||
1787 __get_user(kurb
->error_count
, &uurb
->error_count
) ||
1788 __get_user(kurb
->signr
, &uurb
->signr
))
1791 if (__get_user(uptr
, &uurb
->buffer
))
1793 kurb
->buffer
= compat_ptr(uptr
);
1794 if (__get_user(uptr
, &uurb
->usercontext
))
1796 kurb
->usercontext
= compat_ptr(uptr
);
1801 static int proc_submiturb_compat(struct usb_dev_state
*ps
, void __user
*arg
)
1803 struct usbdevfs_urb uurb
;
1805 if (get_urb32(&uurb
, (struct usbdevfs_urb32 __user
*)arg
))
1808 return proc_do_submiturb(ps
, &uurb
,
1809 ((struct usbdevfs_urb32 __user
*)arg
)->iso_frame_desc
,
1813 static int processcompl_compat(struct async
*as
, void __user
* __user
*arg
)
1815 struct urb
*urb
= as
->urb
;
1816 struct usbdevfs_urb32 __user
*userurb
= as
->userurb
;
1817 void __user
*addr
= as
->userurb
;
1820 if (as
->userbuffer
&& urb
->actual_length
) {
1821 if (copy_urb_data_to_user(as
->userbuffer
, urb
))
1824 if (put_user(as
->status
, &userurb
->status
))
1826 if (put_user(urb
->actual_length
, &userurb
->actual_length
))
1828 if (put_user(urb
->error_count
, &userurb
->error_count
))
1831 if (usb_endpoint_xfer_isoc(&urb
->ep
->desc
)) {
1832 for (i
= 0; i
< urb
->number_of_packets
; i
++) {
1833 if (put_user(urb
->iso_frame_desc
[i
].actual_length
,
1834 &userurb
->iso_frame_desc
[i
].actual_length
))
1836 if (put_user(urb
->iso_frame_desc
[i
].status
,
1837 &userurb
->iso_frame_desc
[i
].status
))
1842 if (put_user(ptr_to_compat(addr
), (u32 __user
*)arg
))
1847 static int proc_reapurb_compat(struct usb_dev_state
*ps
, void __user
*arg
)
1849 struct async
*as
= reap_as(ps
);
1851 int retval
= processcompl_compat(as
, (void __user
* __user
*)arg
);
1855 if (signal_pending(current
))
1860 static int proc_reapurbnonblock_compat(struct usb_dev_state
*ps
, void __user
*arg
)
1866 as
= async_getcompleted(ps
);
1868 retval
= processcompl_compat(as
, (void __user
* __user
*)arg
);
1877 static int proc_disconnectsignal(struct usb_dev_state
*ps
, void __user
*arg
)
1879 struct usbdevfs_disconnectsignal ds
;
1881 if (copy_from_user(&ds
, arg
, sizeof(ds
)))
1883 ps
->discsignr
= ds
.signr
;
1884 ps
->disccontext
= ds
.context
;
1888 static int proc_claiminterface(struct usb_dev_state
*ps
, void __user
*arg
)
1892 if (get_user(ifnum
, (unsigned int __user
*)arg
))
1894 return claimintf(ps
, ifnum
);
1897 static int proc_releaseinterface(struct usb_dev_state
*ps
, void __user
*arg
)
1902 if (get_user(ifnum
, (unsigned int __user
*)arg
))
1904 if ((ret
= releaseintf(ps
, ifnum
)) < 0)
1906 destroy_async_on_interface (ps
, ifnum
);
1910 static int proc_ioctl(struct usb_dev_state
*ps
, struct usbdevfs_ioctl
*ctl
)
1915 struct usb_interface
*intf
= NULL
;
1916 struct usb_driver
*driver
= NULL
;
1919 if ((size
= _IOC_SIZE(ctl
->ioctl_code
)) > 0) {
1920 buf
= kmalloc(size
, GFP_KERNEL
);
1923 if ((_IOC_DIR(ctl
->ioctl_code
) & _IOC_WRITE
)) {
1924 if (copy_from_user(buf
, ctl
->data
, size
)) {
1929 memset(buf
, 0, size
);
1933 if (!connected(ps
)) {
1938 if (ps
->dev
->state
!= USB_STATE_CONFIGURED
)
1939 retval
= -EHOSTUNREACH
;
1940 else if (!(intf
= usb_ifnum_to_if(ps
->dev
, ctl
->ifno
)))
1942 else switch (ctl
->ioctl_code
) {
1944 /* disconnect kernel driver from interface */
1945 case USBDEVFS_DISCONNECT
:
1946 if (intf
->dev
.driver
) {
1947 driver
= to_usb_driver(intf
->dev
.driver
);
1948 dev_dbg(&intf
->dev
, "disconnect by usbfs\n");
1949 usb_driver_release_interface(driver
, intf
);
1954 /* let kernel drivers try to (re)bind to the interface */
1955 case USBDEVFS_CONNECT
:
1956 if (!intf
->dev
.driver
)
1957 retval
= device_attach(&intf
->dev
);
1962 /* talk directly to the interface's driver */
1964 if (intf
->dev
.driver
)
1965 driver
= to_usb_driver(intf
->dev
.driver
);
1966 if (driver
== NULL
|| driver
->unlocked_ioctl
== NULL
) {
1969 retval
= driver
->unlocked_ioctl(intf
, ctl
->ioctl_code
, buf
);
1970 if (retval
== -ENOIOCTLCMD
)
1975 /* cleanup and return */
1977 && (_IOC_DIR(ctl
->ioctl_code
) & _IOC_READ
) != 0
1979 && copy_to_user(ctl
->data
, buf
, size
) != 0)
1986 static int proc_ioctl_default(struct usb_dev_state
*ps
, void __user
*arg
)
1988 struct usbdevfs_ioctl ctrl
;
1990 if (copy_from_user(&ctrl
, arg
, sizeof(ctrl
)))
1992 return proc_ioctl(ps
, &ctrl
);
1995 #ifdef CONFIG_COMPAT
1996 static int proc_ioctl_compat(struct usb_dev_state
*ps
, compat_uptr_t arg
)
1998 struct usbdevfs_ioctl32 __user
*uioc
;
1999 struct usbdevfs_ioctl ctrl
;
2002 uioc
= compat_ptr((long)arg
);
2003 if (!access_ok(VERIFY_READ
, uioc
, sizeof(*uioc
)) ||
2004 __get_user(ctrl
.ifno
, &uioc
->ifno
) ||
2005 __get_user(ctrl
.ioctl_code
, &uioc
->ioctl_code
) ||
2006 __get_user(udata
, &uioc
->data
))
2008 ctrl
.data
= compat_ptr(udata
);
2010 return proc_ioctl(ps
, &ctrl
);
2014 static int proc_claim_port(struct usb_dev_state
*ps
, void __user
*arg
)
2019 if (get_user(portnum
, (unsigned __user
*) arg
))
2021 rc
= usb_hub_claim_port(ps
->dev
, portnum
, ps
);
2023 snoop(&ps
->dev
->dev
, "port %d claimed by process %d: %s\n",
2024 portnum
, task_pid_nr(current
), current
->comm
);
2028 static int proc_release_port(struct usb_dev_state
*ps
, void __user
*arg
)
2032 if (get_user(portnum
, (unsigned __user
*) arg
))
2034 return usb_hub_release_port(ps
->dev
, portnum
, ps
);
2037 static int proc_get_capabilities(struct usb_dev_state
*ps
, void __user
*arg
)
2041 caps
= USBDEVFS_CAP_ZERO_PACKET
| USBDEVFS_CAP_NO_PACKET_SIZE_LIM
;
2042 if (!ps
->dev
->bus
->no_stop_on_short
)
2043 caps
|= USBDEVFS_CAP_BULK_CONTINUATION
;
2044 if (ps
->dev
->bus
->sg_tablesize
)
2045 caps
|= USBDEVFS_CAP_BULK_SCATTER_GATHER
;
2047 if (put_user(caps
, (__u32 __user
*)arg
))
2053 static int proc_disconnect_claim(struct usb_dev_state
*ps
, void __user
*arg
)
2055 struct usbdevfs_disconnect_claim dc
;
2056 struct usb_interface
*intf
;
2058 if (copy_from_user(&dc
, arg
, sizeof(dc
)))
2061 intf
= usb_ifnum_to_if(ps
->dev
, dc
.interface
);
2065 if (intf
->dev
.driver
) {
2066 struct usb_driver
*driver
= to_usb_driver(intf
->dev
.driver
);
2068 if ((dc
.flags
& USBDEVFS_DISCONNECT_CLAIM_IF_DRIVER
) &&
2069 strncmp(dc
.driver
, intf
->dev
.driver
->name
,
2070 sizeof(dc
.driver
)) != 0)
2073 if ((dc
.flags
& USBDEVFS_DISCONNECT_CLAIM_EXCEPT_DRIVER
) &&
2074 strncmp(dc
.driver
, intf
->dev
.driver
->name
,
2075 sizeof(dc
.driver
)) == 0)
2078 dev_dbg(&intf
->dev
, "disconnect by usbfs\n");
2079 usb_driver_release_interface(driver
, intf
);
2082 return claimintf(ps
, dc
.interface
);
2085 static int proc_alloc_streams(struct usb_dev_state
*ps
, void __user
*arg
)
2087 unsigned num_streams
, num_eps
;
2088 struct usb_host_endpoint
**eps
;
2089 struct usb_interface
*intf
;
2092 r
= parse_usbdevfs_streams(ps
, arg
, &num_streams
, &num_eps
,
2097 destroy_async_on_interface(ps
,
2098 intf
->altsetting
[0].desc
.bInterfaceNumber
);
2100 r
= usb_alloc_streams(intf
, eps
, num_eps
, num_streams
, GFP_KERNEL
);
2105 static int proc_free_streams(struct usb_dev_state
*ps
, void __user
*arg
)
2108 struct usb_host_endpoint
**eps
;
2109 struct usb_interface
*intf
;
2112 r
= parse_usbdevfs_streams(ps
, arg
, NULL
, &num_eps
, &eps
, &intf
);
2116 destroy_async_on_interface(ps
,
2117 intf
->altsetting
[0].desc
.bInterfaceNumber
);
2119 r
= usb_free_streams(intf
, eps
, num_eps
, GFP_KERNEL
);
2125 * NOTE: All requests here that have interface numbers as parameters
2126 * are assuming that somehow the configuration has been prevented from
2127 * changing. But there's no mechanism to ensure that...
2129 static long usbdev_do_ioctl(struct file
*file
, unsigned int cmd
,
2132 struct usb_dev_state
*ps
= file
->private_data
;
2133 struct inode
*inode
= file_inode(file
);
2134 struct usb_device
*dev
= ps
->dev
;
2137 if (!(file
->f_mode
& FMODE_WRITE
))
2140 usb_lock_device(dev
);
2141 if (!connected(ps
)) {
2142 usb_unlock_device(dev
);
2147 case USBDEVFS_CONTROL
:
2148 snoop(&dev
->dev
, "%s: CONTROL\n", __func__
);
2149 ret
= proc_control(ps
, p
);
2151 inode
->i_mtime
= CURRENT_TIME
;
2155 snoop(&dev
->dev
, "%s: BULK\n", __func__
);
2156 ret
= proc_bulk(ps
, p
);
2158 inode
->i_mtime
= CURRENT_TIME
;
2161 case USBDEVFS_RESETEP
:
2162 snoop(&dev
->dev
, "%s: RESETEP\n", __func__
);
2163 ret
= proc_resetep(ps
, p
);
2165 inode
->i_mtime
= CURRENT_TIME
;
2168 case USBDEVFS_RESET
:
2169 snoop(&dev
->dev
, "%s: RESET\n", __func__
);
2170 ret
= proc_resetdevice(ps
);
2173 case USBDEVFS_CLEAR_HALT
:
2174 snoop(&dev
->dev
, "%s: CLEAR_HALT\n", __func__
);
2175 ret
= proc_clearhalt(ps
, p
);
2177 inode
->i_mtime
= CURRENT_TIME
;
2180 case USBDEVFS_GETDRIVER
:
2181 snoop(&dev
->dev
, "%s: GETDRIVER\n", __func__
);
2182 ret
= proc_getdriver(ps
, p
);
2185 case USBDEVFS_CONNECTINFO
:
2186 snoop(&dev
->dev
, "%s: CONNECTINFO\n", __func__
);
2187 ret
= proc_connectinfo(ps
, p
);
2190 case USBDEVFS_SETINTERFACE
:
2191 snoop(&dev
->dev
, "%s: SETINTERFACE\n", __func__
);
2192 ret
= proc_setintf(ps
, p
);
2195 case USBDEVFS_SETCONFIGURATION
:
2196 snoop(&dev
->dev
, "%s: SETCONFIGURATION\n", __func__
);
2197 ret
= proc_setconfig(ps
, p
);
2200 case USBDEVFS_SUBMITURB
:
2201 snoop(&dev
->dev
, "%s: SUBMITURB\n", __func__
);
2202 ret
= proc_submiturb(ps
, p
);
2204 inode
->i_mtime
= CURRENT_TIME
;
2207 #ifdef CONFIG_COMPAT
2208 case USBDEVFS_CONTROL32
:
2209 snoop(&dev
->dev
, "%s: CONTROL32\n", __func__
);
2210 ret
= proc_control_compat(ps
, p
);
2212 inode
->i_mtime
= CURRENT_TIME
;
2215 case USBDEVFS_BULK32
:
2216 snoop(&dev
->dev
, "%s: BULK32\n", __func__
);
2217 ret
= proc_bulk_compat(ps
, p
);
2219 inode
->i_mtime
= CURRENT_TIME
;
2222 case USBDEVFS_DISCSIGNAL32
:
2223 snoop(&dev
->dev
, "%s: DISCSIGNAL32\n", __func__
);
2224 ret
= proc_disconnectsignal_compat(ps
, p
);
2227 case USBDEVFS_SUBMITURB32
:
2228 snoop(&dev
->dev
, "%s: SUBMITURB32\n", __func__
);
2229 ret
= proc_submiturb_compat(ps
, p
);
2231 inode
->i_mtime
= CURRENT_TIME
;
2234 case USBDEVFS_REAPURB32
:
2235 snoop(&dev
->dev
, "%s: REAPURB32\n", __func__
);
2236 ret
= proc_reapurb_compat(ps
, p
);
2239 case USBDEVFS_REAPURBNDELAY32
:
2240 snoop(&dev
->dev
, "%s: REAPURBNDELAY32\n", __func__
);
2241 ret
= proc_reapurbnonblock_compat(ps
, p
);
2244 case USBDEVFS_IOCTL32
:
2245 snoop(&dev
->dev
, "%s: IOCTL32\n", __func__
);
2246 ret
= proc_ioctl_compat(ps
, ptr_to_compat(p
));
2250 case USBDEVFS_DISCARDURB
:
2251 snoop(&dev
->dev
, "%s: DISCARDURB\n", __func__
);
2252 ret
= proc_unlinkurb(ps
, p
);
2255 case USBDEVFS_REAPURB
:
2256 snoop(&dev
->dev
, "%s: REAPURB\n", __func__
);
2257 ret
= proc_reapurb(ps
, p
);
2260 case USBDEVFS_REAPURBNDELAY
:
2261 snoop(&dev
->dev
, "%s: REAPURBNDELAY\n", __func__
);
2262 ret
= proc_reapurbnonblock(ps
, p
);
2265 case USBDEVFS_DISCSIGNAL
:
2266 snoop(&dev
->dev
, "%s: DISCSIGNAL\n", __func__
);
2267 ret
= proc_disconnectsignal(ps
, p
);
2270 case USBDEVFS_CLAIMINTERFACE
:
2271 snoop(&dev
->dev
, "%s: CLAIMINTERFACE\n", __func__
);
2272 ret
= proc_claiminterface(ps
, p
);
2275 case USBDEVFS_RELEASEINTERFACE
:
2276 snoop(&dev
->dev
, "%s: RELEASEINTERFACE\n", __func__
);
2277 ret
= proc_releaseinterface(ps
, p
);
2280 case USBDEVFS_IOCTL
:
2281 snoop(&dev
->dev
, "%s: IOCTL\n", __func__
);
2282 ret
= proc_ioctl_default(ps
, p
);
2285 case USBDEVFS_CLAIM_PORT
:
2286 snoop(&dev
->dev
, "%s: CLAIM_PORT\n", __func__
);
2287 ret
= proc_claim_port(ps
, p
);
2290 case USBDEVFS_RELEASE_PORT
:
2291 snoop(&dev
->dev
, "%s: RELEASE_PORT\n", __func__
);
2292 ret
= proc_release_port(ps
, p
);
2294 case USBDEVFS_GET_CAPABILITIES
:
2295 ret
= proc_get_capabilities(ps
, p
);
2297 case USBDEVFS_DISCONNECT_CLAIM
:
2298 ret
= proc_disconnect_claim(ps
, p
);
2300 case USBDEVFS_ALLOC_STREAMS
:
2301 ret
= proc_alloc_streams(ps
, p
);
2303 case USBDEVFS_FREE_STREAMS
:
2304 ret
= proc_free_streams(ps
, p
);
2307 usb_unlock_device(dev
);
2309 inode
->i_atime
= CURRENT_TIME
;
2313 static long usbdev_ioctl(struct file
*file
, unsigned int cmd
,
2318 ret
= usbdev_do_ioctl(file
, cmd
, (void __user
*)arg
);
2323 #ifdef CONFIG_COMPAT
2324 static long usbdev_compat_ioctl(struct file
*file
, unsigned int cmd
,
2329 ret
= usbdev_do_ioctl(file
, cmd
, compat_ptr(arg
));
2335 /* No kernel lock - fine */
2336 static unsigned int usbdev_poll(struct file
*file
,
2337 struct poll_table_struct
*wait
)
2339 struct usb_dev_state
*ps
= file
->private_data
;
2340 unsigned int mask
= 0;
2342 poll_wait(file
, &ps
->wait
, wait
);
2343 if (file
->f_mode
& FMODE_WRITE
&& !list_empty(&ps
->async_completed
))
2344 mask
|= POLLOUT
| POLLWRNORM
;
2346 mask
|= POLLERR
| POLLHUP
;
2350 const struct file_operations usbdev_file_operations
= {
2351 .owner
= THIS_MODULE
,
2352 .llseek
= usbdev_lseek
,
2353 .read
= usbdev_read
,
2354 .poll
= usbdev_poll
,
2355 .unlocked_ioctl
= usbdev_ioctl
,
2356 #ifdef CONFIG_COMPAT
2357 .compat_ioctl
= usbdev_compat_ioctl
,
2359 .open
= usbdev_open
,
2360 .release
= usbdev_release
,
2363 static void usbdev_remove(struct usb_device
*udev
)
2365 struct usb_dev_state
*ps
;
2366 struct siginfo sinfo
;
2368 while (!list_empty(&udev
->filelist
)) {
2369 ps
= list_entry(udev
->filelist
.next
, struct usb_dev_state
, list
);
2370 destroy_all_async(ps
);
2371 wake_up_all(&ps
->wait
);
2372 list_del_init(&ps
->list
);
2373 if (ps
->discsignr
) {
2374 sinfo
.si_signo
= ps
->discsignr
;
2375 sinfo
.si_errno
= EPIPE
;
2376 sinfo
.si_code
= SI_ASYNCIO
;
2377 sinfo
.si_addr
= ps
->disccontext
;
2378 kill_pid_info_as_cred(ps
->discsignr
, &sinfo
,
2379 ps
->disc_pid
, ps
->cred
, ps
->secid
);
2384 static int usbdev_notify(struct notifier_block
*self
,
2385 unsigned long action
, void *dev
)
2388 case USB_DEVICE_ADD
:
2390 case USB_DEVICE_REMOVE
:
2397 static struct notifier_block usbdev_nb
= {
2398 .notifier_call
= usbdev_notify
,
2401 static struct cdev usb_device_cdev
;
2403 int __init
usb_devio_init(void)
2407 retval
= register_chrdev_region(USB_DEVICE_DEV
, USB_DEVICE_MAX
,
2410 printk(KERN_ERR
"Unable to register minors for usb_device\n");
2413 cdev_init(&usb_device_cdev
, &usbdev_file_operations
);
2414 retval
= cdev_add(&usb_device_cdev
, USB_DEVICE_DEV
, USB_DEVICE_MAX
);
2416 printk(KERN_ERR
"Unable to get usb_device major %d\n",
2420 usb_register_notify(&usbdev_nb
);
2425 unregister_chrdev_region(USB_DEVICE_DEV
, USB_DEVICE_MAX
);
2429 void usb_devio_cleanup(void)
2431 usb_unregister_notify(&usbdev_nb
);
2432 cdev_del(&usb_device_cdev
);
2433 unregister_chrdev_region(USB_DEVICE_DEV
, USB_DEVICE_MAX
);