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/smp_lock.h>
41 #include <linux/signal.h>
42 #include <linux/poll.h>
43 #include <linux/module.h>
44 #include <linux/usb.h>
45 #include <linux/usbdevice_fs.h>
46 #include <linux/cdev.h>
47 #include <linux/notifier.h>
48 #include <linux/security.h>
49 #include <asm/uaccess.h>
50 #include <asm/byteorder.h>
51 #include <linux/moduleparam.h>
53 #include "hcd.h" /* for usbcore internals */
57 #define USB_DEVICE_MAX USB_MAXBUS * 128
59 /* Mutual exclusion for removal, open, and release */
60 DEFINE_MUTEX(usbfs_mutex
);
63 struct list_head list
; /* state list */
64 struct usb_device
*dev
;
66 spinlock_t lock
; /* protects the async urb lists */
67 struct list_head async_pending
;
68 struct list_head async_completed
;
69 wait_queue_head_t wait
; /* wake up if a request completed */
70 unsigned int discsignr
;
72 uid_t disc_uid
, disc_euid
;
73 void __user
*disccontext
;
74 unsigned long ifclaimed
;
79 struct list_head asynclist
;
85 void __user
*userbuffer
;
92 static int usbfs_snoop
;
93 module_param(usbfs_snoop
, bool, S_IRUGO
| S_IWUSR
);
94 MODULE_PARM_DESC(usbfs_snoop
, "true to log all usbfs traffic");
96 #define snoop(dev, format, arg...) \
99 dev_info(dev , format , ## arg); \
102 #define USB_DEVICE_DEV MKDEV(USB_DEVICE_MAJOR, 0)
105 #define MAX_USBFS_BUFFER_SIZE 16384
107 static inline int connected(struct dev_state
*ps
)
109 return (!list_empty(&ps
->list
) &&
110 ps
->dev
->state
!= USB_STATE_NOTATTACHED
);
113 static loff_t
usbdev_lseek(struct file
*file
, loff_t offset
, int orig
)
121 file
->f_pos
= offset
;
125 file
->f_pos
+= offset
;
137 static ssize_t
usbdev_read(struct file
*file
, char __user
*buf
, size_t nbytes
,
140 struct dev_state
*ps
= file
->private_data
;
141 struct usb_device
*dev
= ps
->dev
;
148 usb_lock_device(dev
);
149 if (!connected(ps
)) {
152 } else if (pos
< 0) {
157 if (pos
< sizeof(struct usb_device_descriptor
)) {
158 /* 18 bytes - fits on the stack */
159 struct usb_device_descriptor temp_desc
;
161 memcpy(&temp_desc
, &dev
->descriptor
, sizeof(dev
->descriptor
));
162 le16_to_cpus(&temp_desc
.bcdUSB
);
163 le16_to_cpus(&temp_desc
.idVendor
);
164 le16_to_cpus(&temp_desc
.idProduct
);
165 le16_to_cpus(&temp_desc
.bcdDevice
);
167 len
= sizeof(struct usb_device_descriptor
) - pos
;
170 if (copy_to_user(buf
, ((char *)&temp_desc
) + pos
, len
)) {
181 pos
= sizeof(struct usb_device_descriptor
);
182 for (i
= 0; nbytes
&& i
< dev
->descriptor
.bNumConfigurations
; i
++) {
183 struct usb_config_descriptor
*config
=
184 (struct usb_config_descriptor
*)dev
->rawdescriptors
[i
];
185 unsigned int length
= le16_to_cpu(config
->wTotalLength
);
187 if (*ppos
< pos
+ length
) {
189 /* The descriptor may claim to be longer than it
190 * really is. Here is the actual allocated length. */
192 le16_to_cpu(dev
->config
[i
].desc
.wTotalLength
);
194 len
= length
- (*ppos
- pos
);
198 /* Simply don't write (skip over) unallocated parts */
199 if (alloclen
> (*ppos
- pos
)) {
200 alloclen
-= (*ppos
- pos
);
201 if (copy_to_user(buf
,
202 dev
->rawdescriptors
[i
] + (*ppos
- pos
),
203 min(len
, alloclen
))) {
219 usb_unlock_device(dev
);
224 * async list handling
227 static struct async
*alloc_async(unsigned int numisoframes
)
231 as
= kzalloc(sizeof(struct async
), GFP_KERNEL
);
234 as
->urb
= usb_alloc_urb(numisoframes
, GFP_KERNEL
);
242 static void free_async(struct async
*as
)
245 kfree(as
->urb
->transfer_buffer
);
246 kfree(as
->urb
->setup_packet
);
247 usb_free_urb(as
->urb
);
251 static inline void async_newpending(struct async
*as
)
253 struct dev_state
*ps
= as
->ps
;
256 spin_lock_irqsave(&ps
->lock
, flags
);
257 list_add_tail(&as
->asynclist
, &ps
->async_pending
);
258 spin_unlock_irqrestore(&ps
->lock
, flags
);
261 static inline void async_removepending(struct async
*as
)
263 struct dev_state
*ps
= as
->ps
;
266 spin_lock_irqsave(&ps
->lock
, flags
);
267 list_del_init(&as
->asynclist
);
268 spin_unlock_irqrestore(&ps
->lock
, flags
);
271 static inline struct async
*async_getcompleted(struct dev_state
*ps
)
274 struct async
*as
= NULL
;
276 spin_lock_irqsave(&ps
->lock
, flags
);
277 if (!list_empty(&ps
->async_completed
)) {
278 as
= list_entry(ps
->async_completed
.next
, struct async
,
280 list_del_init(&as
->asynclist
);
282 spin_unlock_irqrestore(&ps
->lock
, flags
);
286 static inline struct async
*async_getpending(struct dev_state
*ps
,
287 void __user
*userurb
)
292 spin_lock_irqsave(&ps
->lock
, flags
);
293 list_for_each_entry(as
, &ps
->async_pending
, asynclist
)
294 if (as
->userurb
== userurb
) {
295 list_del_init(&as
->asynclist
);
296 spin_unlock_irqrestore(&ps
->lock
, flags
);
299 spin_unlock_irqrestore(&ps
->lock
, flags
);
303 static void snoop_urb(struct urb
*urb
, void __user
*userurb
)
306 unsigned char *data
= urb
->transfer_buffer
;
311 dev_info(&urb
->dev
->dev
, "direction=%s\n",
312 usb_urb_dir_in(urb
) ? "IN" : "OUT");
313 dev_info(&urb
->dev
->dev
, "userurb=%p\n", userurb
);
314 dev_info(&urb
->dev
->dev
, "transfer_buffer_length=%d\n",
315 urb
->transfer_buffer_length
);
316 dev_info(&urb
->dev
->dev
, "actual_length=%d\n", urb
->actual_length
);
317 dev_info(&urb
->dev
->dev
, "data: ");
318 for (j
= 0; j
< urb
->transfer_buffer_length
; ++j
)
319 printk("%02x ", data
[j
]);
323 static void async_completed(struct urb
*urb
)
325 struct async
*as
= urb
->context
;
326 struct dev_state
*ps
= as
->ps
;
327 struct siginfo sinfo
;
329 spin_lock(&ps
->lock
);
330 list_move_tail(&as
->asynclist
, &ps
->async_completed
);
331 spin_unlock(&ps
->lock
);
332 as
->status
= urb
->status
;
334 sinfo
.si_signo
= as
->signr
;
335 sinfo
.si_errno
= as
->status
;
336 sinfo
.si_code
= SI_ASYNCIO
;
337 sinfo
.si_addr
= as
->userurb
;
338 kill_pid_info_as_uid(as
->signr
, &sinfo
, as
->pid
, as
->uid
,
339 as
->euid
, as
->secid
);
341 snoop(&urb
->dev
->dev
, "urb complete\n");
342 snoop_urb(urb
, as
->userurb
);
346 static void destroy_async(struct dev_state
*ps
, struct list_head
*list
)
351 spin_lock_irqsave(&ps
->lock
, flags
);
352 while (!list_empty(list
)) {
353 as
= list_entry(list
->next
, struct async
, asynclist
);
354 list_del_init(&as
->asynclist
);
356 /* drop the spinlock so the completion handler can run */
357 spin_unlock_irqrestore(&ps
->lock
, flags
);
358 usb_kill_urb(as
->urb
);
359 spin_lock_irqsave(&ps
->lock
, flags
);
361 spin_unlock_irqrestore(&ps
->lock
, flags
);
364 static void destroy_async_on_interface(struct dev_state
*ps
,
367 struct list_head
*p
, *q
, hitlist
;
370 INIT_LIST_HEAD(&hitlist
);
371 spin_lock_irqsave(&ps
->lock
, flags
);
372 list_for_each_safe(p
, q
, &ps
->async_pending
)
373 if (ifnum
== list_entry(p
, struct async
, asynclist
)->ifnum
)
374 list_move_tail(p
, &hitlist
);
375 spin_unlock_irqrestore(&ps
->lock
, flags
);
376 destroy_async(ps
, &hitlist
);
379 static inline void destroy_all_async(struct dev_state
*ps
)
381 destroy_async(ps
, &ps
->async_pending
);
385 * interface claims are made only at the request of user level code,
386 * which can also release them (explicitly or by closing files).
387 * they're also undone when devices disconnect.
390 static int driver_probe(struct usb_interface
*intf
,
391 const struct usb_device_id
*id
)
396 static void driver_disconnect(struct usb_interface
*intf
)
398 struct dev_state
*ps
= usb_get_intfdata(intf
);
399 unsigned int ifnum
= intf
->altsetting
->desc
.bInterfaceNumber
;
404 /* NOTE: this relies on usbcore having canceled and completed
405 * all pending I/O requests; 2.6 does that.
408 if (likely(ifnum
< 8*sizeof(ps
->ifclaimed
)))
409 clear_bit(ifnum
, &ps
->ifclaimed
);
411 dev_warn(&intf
->dev
, "interface number %u out of range\n",
414 usb_set_intfdata(intf
, NULL
);
416 /* force async requests to complete */
417 destroy_async_on_interface(ps
, ifnum
);
420 /* The following routines are merely placeholders. There is no way
421 * to inform a user task about suspend or resumes.
423 static int driver_suspend(struct usb_interface
*intf
, pm_message_t msg
)
428 static int driver_resume(struct usb_interface
*intf
)
433 struct usb_driver usbfs_driver
= {
435 .probe
= driver_probe
,
436 .disconnect
= driver_disconnect
,
437 .suspend
= driver_suspend
,
438 .resume
= driver_resume
,
441 static int claimintf(struct dev_state
*ps
, unsigned int ifnum
)
443 struct usb_device
*dev
= ps
->dev
;
444 struct usb_interface
*intf
;
447 if (ifnum
>= 8*sizeof(ps
->ifclaimed
))
449 /* already claimed */
450 if (test_bit(ifnum
, &ps
->ifclaimed
))
453 intf
= usb_ifnum_to_if(dev
, ifnum
);
457 err
= usb_driver_claim_interface(&usbfs_driver
, intf
, ps
);
459 set_bit(ifnum
, &ps
->ifclaimed
);
463 static int releaseintf(struct dev_state
*ps
, unsigned int ifnum
)
465 struct usb_device
*dev
;
466 struct usb_interface
*intf
;
470 if (ifnum
>= 8*sizeof(ps
->ifclaimed
))
473 intf
= usb_ifnum_to_if(dev
, ifnum
);
476 else if (test_and_clear_bit(ifnum
, &ps
->ifclaimed
)) {
477 usb_driver_release_interface(&usbfs_driver
, intf
);
483 static int checkintf(struct dev_state
*ps
, unsigned int ifnum
)
485 if (ps
->dev
->state
!= USB_STATE_CONFIGURED
)
486 return -EHOSTUNREACH
;
487 if (ifnum
>= 8*sizeof(ps
->ifclaimed
))
489 if (test_bit(ifnum
, &ps
->ifclaimed
))
491 /* if not yet claimed, claim it for the driver */
492 dev_warn(&ps
->dev
->dev
, "usbfs: process %d (%s) did not claim "
493 "interface %u before use\n", task_pid_nr(current
),
494 current
->comm
, ifnum
);
495 return claimintf(ps
, ifnum
);
498 static int findintfep(struct usb_device
*dev
, unsigned int ep
)
500 unsigned int i
, j
, e
;
501 struct usb_interface
*intf
;
502 struct usb_host_interface
*alts
;
503 struct usb_endpoint_descriptor
*endpt
;
505 if (ep
& ~(USB_DIR_IN
|0xf))
509 for (i
= 0; i
< dev
->actconfig
->desc
.bNumInterfaces
; i
++) {
510 intf
= dev
->actconfig
->interface
[i
];
511 for (j
= 0; j
< intf
->num_altsetting
; j
++) {
512 alts
= &intf
->altsetting
[j
];
513 for (e
= 0; e
< alts
->desc
.bNumEndpoints
; e
++) {
514 endpt
= &alts
->endpoint
[e
].desc
;
515 if (endpt
->bEndpointAddress
== ep
)
516 return alts
->desc
.bInterfaceNumber
;
523 static int check_ctrlrecip(struct dev_state
*ps
, unsigned int requesttype
,
528 if (ps
->dev
->state
!= USB_STATE_ADDRESS
529 && ps
->dev
->state
!= USB_STATE_CONFIGURED
)
530 return -EHOSTUNREACH
;
531 if (USB_TYPE_VENDOR
== (USB_TYPE_MASK
& requesttype
))
535 switch (requesttype
& USB_RECIP_MASK
) {
536 case USB_RECIP_ENDPOINT
:
537 ret
= findintfep(ps
->dev
, index
);
539 ret
= checkintf(ps
, ret
);
542 case USB_RECIP_INTERFACE
:
543 ret
= checkintf(ps
, index
);
549 static int match_devt(struct device
*dev
, void *data
)
551 return dev
->devt
== (dev_t
) (unsigned long) data
;
554 static struct usb_device
*usbdev_lookup_by_devt(dev_t devt
)
558 dev
= bus_find_device(&usb_bus_type
, NULL
,
559 (void *) (unsigned long) devt
, match_devt
);
562 return container_of(dev
, struct usb_device
, dev
);
568 static int usbdev_open(struct inode
*inode
, struct file
*file
)
570 struct usb_device
*dev
= NULL
;
571 struct dev_state
*ps
;
572 const struct cred
*cred
= current_cred();
576 /* Protect against simultaneous removal or release */
577 mutex_lock(&usbfs_mutex
);
580 ps
= kmalloc(sizeof(struct dev_state
), GFP_KERNEL
);
586 /* usbdev device-node */
587 if (imajor(inode
) == USB_DEVICE_MAJOR
)
588 dev
= usbdev_lookup_by_devt(inode
->i_rdev
);
589 #ifdef CONFIG_USB_DEVICEFS
592 dev
= inode
->i_private
;
593 if (dev
&& dev
->usbfs_dentry
&&
594 dev
->usbfs_dentry
->d_inode
== inode
)
600 if (!dev
|| dev
->state
== USB_STATE_NOTATTACHED
)
602 ret
= usb_autoresume_device(dev
);
609 spin_lock_init(&ps
->lock
);
610 INIT_LIST_HEAD(&ps
->list
);
611 INIT_LIST_HEAD(&ps
->async_pending
);
612 INIT_LIST_HEAD(&ps
->async_completed
);
613 init_waitqueue_head(&ps
->wait
);
615 ps
->disc_pid
= get_pid(task_pid(current
));
616 ps
->disc_uid
= cred
->uid
;
617 ps
->disc_euid
= cred
->euid
;
618 ps
->disccontext
= NULL
;
620 security_task_getsecid(current
, &ps
->secid
);
622 list_add_tail(&ps
->list
, &dev
->filelist
);
623 file
->private_data
= ps
;
624 snoop(&dev
->dev
, "opened by process %d: %s\n", task_pid_nr(current
),
631 mutex_unlock(&usbfs_mutex
);
636 static int usbdev_release(struct inode
*inode
, struct file
*file
)
638 struct dev_state
*ps
= file
->private_data
;
639 struct usb_device
*dev
= ps
->dev
;
643 usb_lock_device(dev
);
645 /* Protect against simultaneous open */
646 mutex_lock(&usbfs_mutex
);
647 list_del_init(&ps
->list
);
648 mutex_unlock(&usbfs_mutex
);
650 for (ifnum
= 0; ps
->ifclaimed
&& ifnum
< 8*sizeof(ps
->ifclaimed
);
652 if (test_bit(ifnum
, &ps
->ifclaimed
))
653 releaseintf(ps
, ifnum
);
655 destroy_all_async(ps
);
656 usb_autosuspend_device(dev
);
657 usb_unlock_device(dev
);
659 put_pid(ps
->disc_pid
);
661 as
= async_getcompleted(ps
);
664 as
= async_getcompleted(ps
);
670 static int proc_control(struct dev_state
*ps
, void __user
*arg
)
672 struct usb_device
*dev
= ps
->dev
;
673 struct usbdevfs_ctrltransfer ctrl
;
679 if (copy_from_user(&ctrl
, arg
, sizeof(ctrl
)))
681 ret
= check_ctrlrecip(ps
, ctrl
.bRequestType
, ctrl
.wIndex
);
684 wLength
= ctrl
.wLength
; /* To suppress 64k PAGE_SIZE warning */
685 if (wLength
> PAGE_SIZE
)
687 tbuf
= (unsigned char *)__get_free_page(GFP_KERNEL
);
691 if (ctrl
.bRequestType
& 0x80) {
692 if (ctrl
.wLength
&& !access_ok(VERIFY_WRITE
, ctrl
.data
,
694 free_page((unsigned long)tbuf
);
697 snoop(&dev
->dev
, "control read: bRequest=%02x "
698 "bRrequestType=%02x wValue=%04x "
699 "wIndex=%04x wLength=%04x\n",
700 ctrl
.bRequest
, ctrl
.bRequestType
, ctrl
.wValue
,
701 ctrl
.wIndex
, ctrl
.wLength
);
703 usb_unlock_device(dev
);
704 i
= usb_control_msg(dev
, usb_rcvctrlpipe(dev
, 0), ctrl
.bRequest
,
705 ctrl
.bRequestType
, ctrl
.wValue
, ctrl
.wIndex
,
706 tbuf
, ctrl
.wLength
, tmo
);
707 usb_lock_device(dev
);
708 if ((i
> 0) && ctrl
.wLength
) {
710 dev_info(&dev
->dev
, "control read: data ");
711 for (j
= 0; j
< i
; ++j
)
712 printk("%02x ", (u8
)(tbuf
)[j
]);
715 if (copy_to_user(ctrl
.data
, tbuf
, i
)) {
716 free_page((unsigned long)tbuf
);
722 if (copy_from_user(tbuf
, ctrl
.data
, ctrl
.wLength
)) {
723 free_page((unsigned long)tbuf
);
727 snoop(&dev
->dev
, "control write: bRequest=%02x "
728 "bRrequestType=%02x wValue=%04x "
729 "wIndex=%04x wLength=%04x\n",
730 ctrl
.bRequest
, ctrl
.bRequestType
, ctrl
.wValue
,
731 ctrl
.wIndex
, ctrl
.wLength
);
733 dev_info(&dev
->dev
, "control write: data: ");
734 for (j
= 0; j
< ctrl
.wLength
; ++j
)
735 printk("%02x ", (unsigned char)(tbuf
)[j
]);
738 usb_unlock_device(dev
);
739 i
= usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0), ctrl
.bRequest
,
740 ctrl
.bRequestType
, ctrl
.wValue
, ctrl
.wIndex
,
741 tbuf
, ctrl
.wLength
, tmo
);
742 usb_lock_device(dev
);
744 free_page((unsigned long)tbuf
);
745 if (i
< 0 && i
!= -EPIPE
) {
746 dev_printk(KERN_DEBUG
, &dev
->dev
, "usbfs: USBDEVFS_CONTROL "
747 "failed cmd %s rqt %u rq %u len %u ret %d\n",
748 current
->comm
, ctrl
.bRequestType
, ctrl
.bRequest
,
754 static int proc_bulk(struct dev_state
*ps
, void __user
*arg
)
756 struct usb_device
*dev
= ps
->dev
;
757 struct usbdevfs_bulktransfer bulk
;
758 unsigned int tmo
, len1
, pipe
;
763 if (copy_from_user(&bulk
, arg
, sizeof(bulk
)))
765 ret
= findintfep(ps
->dev
, bulk
.ep
);
768 ret
= checkintf(ps
, ret
);
771 if (bulk
.ep
& USB_DIR_IN
)
772 pipe
= usb_rcvbulkpipe(dev
, bulk
.ep
& 0x7f);
774 pipe
= usb_sndbulkpipe(dev
, bulk
.ep
& 0x7f);
775 if (!usb_maxpacket(dev
, pipe
, !(bulk
.ep
& USB_DIR_IN
)))
778 if (len1
> MAX_USBFS_BUFFER_SIZE
)
780 if (!(tbuf
= kmalloc(len1
, GFP_KERNEL
)))
783 if (bulk
.ep
& 0x80) {
784 if (len1
&& !access_ok(VERIFY_WRITE
, bulk
.data
, len1
)) {
788 snoop(&dev
->dev
, "bulk read: len=0x%02x timeout=%04d\n",
789 bulk
.len
, bulk
.timeout
);
790 usb_unlock_device(dev
);
791 i
= usb_bulk_msg(dev
, pipe
, tbuf
, len1
, &len2
, tmo
);
792 usb_lock_device(dev
);
795 dev_info(&dev
->dev
, "bulk read: data ");
796 for (j
= 0; j
< len2
; ++j
)
797 printk("%02x ", (u8
)(tbuf
)[j
]);
800 if (copy_to_user(bulk
.data
, tbuf
, len2
)) {
807 if (copy_from_user(tbuf
, bulk
.data
, len1
)) {
812 snoop(&dev
->dev
, "bulk write: len=0x%02x timeout=%04d\n",
813 bulk
.len
, bulk
.timeout
);
815 dev_info(&dev
->dev
, "bulk write: data: ");
816 for (j
= 0; j
< len1
; ++j
)
817 printk("%02x ", (unsigned char)(tbuf
)[j
]);
820 usb_unlock_device(dev
);
821 i
= usb_bulk_msg(dev
, pipe
, tbuf
, len1
, &len2
, tmo
);
822 usb_lock_device(dev
);
830 static int proc_resetep(struct dev_state
*ps
, void __user
*arg
)
835 if (get_user(ep
, (unsigned int __user
*)arg
))
837 ret
= findintfep(ps
->dev
, ep
);
840 ret
= checkintf(ps
, ret
);
843 usb_settoggle(ps
->dev
, ep
& 0xf, !(ep
& USB_DIR_IN
), 0);
847 static int proc_clearhalt(struct dev_state
*ps
, void __user
*arg
)
853 if (get_user(ep
, (unsigned int __user
*)arg
))
855 ret
= findintfep(ps
->dev
, ep
);
858 ret
= checkintf(ps
, ret
);
862 pipe
= usb_rcvbulkpipe(ps
->dev
, ep
& 0x7f);
864 pipe
= usb_sndbulkpipe(ps
->dev
, ep
& 0x7f);
866 return usb_clear_halt(ps
->dev
, pipe
);
869 static int proc_getdriver(struct dev_state
*ps
, void __user
*arg
)
871 struct usbdevfs_getdriver gd
;
872 struct usb_interface
*intf
;
875 if (copy_from_user(&gd
, arg
, sizeof(gd
)))
877 intf
= usb_ifnum_to_if(ps
->dev
, gd
.interface
);
878 if (!intf
|| !intf
->dev
.driver
)
881 strncpy(gd
.driver
, intf
->dev
.driver
->name
,
883 ret
= (copy_to_user(arg
, &gd
, sizeof(gd
)) ? -EFAULT
: 0);
888 static int proc_connectinfo(struct dev_state
*ps
, void __user
*arg
)
890 struct usbdevfs_connectinfo ci
;
892 ci
.devnum
= ps
->dev
->devnum
;
893 ci
.slow
= ps
->dev
->speed
== USB_SPEED_LOW
;
894 if (copy_to_user(arg
, &ci
, sizeof(ci
)))
899 static int proc_resetdevice(struct dev_state
*ps
)
901 return usb_reset_device(ps
->dev
);
904 static int proc_setintf(struct dev_state
*ps
, void __user
*arg
)
906 struct usbdevfs_setinterface setintf
;
909 if (copy_from_user(&setintf
, arg
, sizeof(setintf
)))
911 if ((ret
= checkintf(ps
, setintf
.interface
)))
913 return usb_set_interface(ps
->dev
, setintf
.interface
,
917 static int proc_setconfig(struct dev_state
*ps
, void __user
*arg
)
921 struct usb_host_config
*actconfig
;
923 if (get_user(u
, (int __user
*)arg
))
926 actconfig
= ps
->dev
->actconfig
;
928 /* Don't touch the device if any interfaces are claimed.
929 * It could interfere with other drivers' operations, and if
930 * an interface is claimed by usbfs it could easily deadlock.
935 for (i
= 0; i
< actconfig
->desc
.bNumInterfaces
; ++i
) {
936 if (usb_interface_claimed(actconfig
->interface
[i
])) {
937 dev_warn(&ps
->dev
->dev
,
938 "usbfs: interface %d claimed by %s "
939 "while '%s' sets config #%d\n",
940 actconfig
->interface
[i
]
942 ->desc
.bInterfaceNumber
,
943 actconfig
->interface
[i
]
952 /* SET_CONFIGURATION is often abused as a "cheap" driver reset,
953 * so avoid usb_set_configuration()'s kick to sysfs
956 if (actconfig
&& actconfig
->desc
.bConfigurationValue
== u
)
957 status
= usb_reset_configuration(ps
->dev
);
959 status
= usb_set_configuration(ps
->dev
, u
);
965 static int proc_do_submiturb(struct dev_state
*ps
, struct usbdevfs_urb
*uurb
,
966 struct usbdevfs_iso_packet_desc __user
*iso_frame_desc
,
969 struct usbdevfs_iso_packet_desc
*isopkt
= NULL
;
970 struct usb_host_endpoint
*ep
;
972 struct usb_ctrlrequest
*dr
= NULL
;
973 const struct cred
*cred
= current_cred();
974 unsigned int u
, totlen
, isofrmlen
;
978 if (uurb
->flags
& ~(USBDEVFS_URB_ISO_ASAP
|
979 USBDEVFS_URB_SHORT_NOT_OK
|
980 USBDEVFS_URB_NO_FSBR
|
981 USBDEVFS_URB_ZERO_PACKET
|
982 USBDEVFS_URB_NO_INTERRUPT
))
986 if (!(uurb
->type
== USBDEVFS_URB_TYPE_CONTROL
&&
987 (uurb
->endpoint
& ~USB_ENDPOINT_DIR_MASK
) == 0)) {
988 ifnum
= findintfep(ps
->dev
, uurb
->endpoint
);
991 ret
= checkintf(ps
, ifnum
);
995 if ((uurb
->endpoint
& USB_ENDPOINT_DIR_MASK
) != 0) {
997 ep
= ps
->dev
->ep_in
[uurb
->endpoint
& USB_ENDPOINT_NUMBER_MASK
];
1000 ep
= ps
->dev
->ep_out
[uurb
->endpoint
& USB_ENDPOINT_NUMBER_MASK
];
1004 switch(uurb
->type
) {
1005 case USBDEVFS_URB_TYPE_CONTROL
:
1006 if (!usb_endpoint_xfer_control(&ep
->desc
))
1008 /* min 8 byte setup packet,
1009 * max 8 byte setup plus an arbitrary data stage */
1010 if (uurb
->buffer_length
< 8 ||
1011 uurb
->buffer_length
> (8 + MAX_USBFS_BUFFER_SIZE
))
1013 dr
= kmalloc(sizeof(struct usb_ctrlrequest
), GFP_KERNEL
);
1016 if (copy_from_user(dr
, uurb
->buffer
, 8)) {
1020 if (uurb
->buffer_length
< (le16_to_cpup(&dr
->wLength
) + 8)) {
1024 ret
= check_ctrlrecip(ps
, dr
->bRequestType
,
1025 le16_to_cpup(&dr
->wIndex
));
1030 uurb
->number_of_packets
= 0;
1031 uurb
->buffer_length
= le16_to_cpup(&dr
->wLength
);
1033 if ((dr
->bRequestType
& USB_DIR_IN
) && uurb
->buffer_length
) {
1035 uurb
->endpoint
|= USB_DIR_IN
;
1038 uurb
->endpoint
&= ~USB_DIR_IN
;
1040 if (!access_ok(is_in
? VERIFY_WRITE
: VERIFY_READ
,
1041 uurb
->buffer
, uurb
->buffer_length
)) {
1045 snoop(&ps
->dev
->dev
, "control urb: bRequest=%02x "
1046 "bRrequestType=%02x wValue=%04x "
1047 "wIndex=%04x wLength=%04x\n",
1048 dr
->bRequest
, dr
->bRequestType
,
1049 __le16_to_cpup(&dr
->wValue
),
1050 __le16_to_cpup(&dr
->wIndex
),
1051 __le16_to_cpup(&dr
->wLength
));
1054 case USBDEVFS_URB_TYPE_BULK
:
1055 switch (usb_endpoint_type(&ep
->desc
)) {
1056 case USB_ENDPOINT_XFER_CONTROL
:
1057 case USB_ENDPOINT_XFER_ISOC
:
1059 /* allow single-shot interrupt transfers, at bogus rates */
1061 uurb
->number_of_packets
= 0;
1062 if (uurb
->buffer_length
> MAX_USBFS_BUFFER_SIZE
)
1064 if (!access_ok(is_in
? VERIFY_WRITE
: VERIFY_READ
,
1065 uurb
->buffer
, uurb
->buffer_length
))
1067 snoop(&ps
->dev
->dev
, "bulk urb\n");
1070 case USBDEVFS_URB_TYPE_ISO
:
1071 /* arbitrary limit */
1072 if (uurb
->number_of_packets
< 1 ||
1073 uurb
->number_of_packets
> 128)
1075 if (!usb_endpoint_xfer_isoc(&ep
->desc
))
1077 isofrmlen
= sizeof(struct usbdevfs_iso_packet_desc
) *
1078 uurb
->number_of_packets
;
1079 if (!(isopkt
= kmalloc(isofrmlen
, GFP_KERNEL
)))
1081 if (copy_from_user(isopkt
, iso_frame_desc
, isofrmlen
)) {
1085 for (totlen
= u
= 0; u
< uurb
->number_of_packets
; u
++) {
1087 * sufficient for USB 2.0 high-bandwidth iso */
1088 if (isopkt
[u
].length
> 8192) {
1092 totlen
+= isopkt
[u
].length
;
1094 if (totlen
> 32768) {
1098 uurb
->buffer_length
= totlen
;
1099 snoop(&ps
->dev
->dev
, "iso urb\n");
1102 case USBDEVFS_URB_TYPE_INTERRUPT
:
1103 uurb
->number_of_packets
= 0;
1104 if (!usb_endpoint_xfer_int(&ep
->desc
))
1106 if (uurb
->buffer_length
> MAX_USBFS_BUFFER_SIZE
)
1108 if (!access_ok(is_in
? VERIFY_WRITE
: VERIFY_READ
,
1109 uurb
->buffer
, uurb
->buffer_length
))
1111 snoop(&ps
->dev
->dev
, "interrupt urb\n");
1117 as
= alloc_async(uurb
->number_of_packets
);
1123 as
->urb
->transfer_buffer
= kmalloc(uurb
->buffer_length
, GFP_KERNEL
);
1124 if (!as
->urb
->transfer_buffer
) {
1130 as
->urb
->dev
= ps
->dev
;
1131 as
->urb
->pipe
= (uurb
->type
<< 30) |
1132 __create_pipe(ps
->dev
, uurb
->endpoint
& 0xf) |
1133 (uurb
->endpoint
& USB_DIR_IN
);
1135 /* This tedious sequence is necessary because the URB_* flags
1136 * are internal to the kernel and subject to change, whereas
1137 * the USBDEVFS_URB_* flags are a user API and must not be changed.
1139 u
= (is_in
? URB_DIR_IN
: URB_DIR_OUT
);
1140 if (uurb
->flags
& USBDEVFS_URB_ISO_ASAP
)
1142 if (uurb
->flags
& USBDEVFS_URB_SHORT_NOT_OK
)
1143 u
|= URB_SHORT_NOT_OK
;
1144 if (uurb
->flags
& USBDEVFS_URB_NO_FSBR
)
1146 if (uurb
->flags
& USBDEVFS_URB_ZERO_PACKET
)
1147 u
|= URB_ZERO_PACKET
;
1148 if (uurb
->flags
& USBDEVFS_URB_NO_INTERRUPT
)
1149 u
|= URB_NO_INTERRUPT
;
1150 as
->urb
->transfer_flags
= u
;
1152 as
->urb
->transfer_buffer_length
= uurb
->buffer_length
;
1153 as
->urb
->setup_packet
= (unsigned char *)dr
;
1154 as
->urb
->start_frame
= uurb
->start_frame
;
1155 as
->urb
->number_of_packets
= uurb
->number_of_packets
;
1156 if (uurb
->type
== USBDEVFS_URB_TYPE_ISO
||
1157 ps
->dev
->speed
== USB_SPEED_HIGH
)
1158 as
->urb
->interval
= 1 << min(15, ep
->desc
.bInterval
- 1);
1160 as
->urb
->interval
= ep
->desc
.bInterval
;
1161 as
->urb
->context
= as
;
1162 as
->urb
->complete
= async_completed
;
1163 for (totlen
= u
= 0; u
< uurb
->number_of_packets
; u
++) {
1164 as
->urb
->iso_frame_desc
[u
].offset
= totlen
;
1165 as
->urb
->iso_frame_desc
[u
].length
= isopkt
[u
].length
;
1166 totlen
+= isopkt
[u
].length
;
1171 if (uurb
->endpoint
& USB_DIR_IN
)
1172 as
->userbuffer
= uurb
->buffer
;
1174 as
->userbuffer
= NULL
;
1175 as
->signr
= uurb
->signr
;
1177 as
->pid
= get_pid(task_pid(current
));
1178 as
->uid
= cred
->uid
;
1179 as
->euid
= cred
->euid
;
1180 security_task_getsecid(current
, &as
->secid
);
1182 if (copy_from_user(as
->urb
->transfer_buffer
, uurb
->buffer
,
1183 as
->urb
->transfer_buffer_length
)) {
1188 snoop_urb(as
->urb
, as
->userurb
);
1189 async_newpending(as
);
1190 if ((ret
= usb_submit_urb(as
->urb
, GFP_KERNEL
))) {
1191 dev_printk(KERN_DEBUG
, &ps
->dev
->dev
,
1192 "usbfs: usb_submit_urb returned %d\n", ret
);
1193 async_removepending(as
);
1200 static int proc_submiturb(struct dev_state
*ps
, void __user
*arg
)
1202 struct usbdevfs_urb uurb
;
1204 if (copy_from_user(&uurb
, arg
, sizeof(uurb
)))
1207 return proc_do_submiturb(ps
, &uurb
,
1208 (((struct usbdevfs_urb __user
*)arg
)->iso_frame_desc
),
1212 static int proc_unlinkurb(struct dev_state
*ps
, void __user
*arg
)
1216 as
= async_getpending(ps
, arg
);
1219 usb_kill_urb(as
->urb
);
1223 static int processcompl(struct async
*as
, void __user
* __user
*arg
)
1225 struct urb
*urb
= as
->urb
;
1226 struct usbdevfs_urb __user
*userurb
= as
->userurb
;
1227 void __user
*addr
= as
->userurb
;
1231 if (copy_to_user(as
->userbuffer
, urb
->transfer_buffer
,
1232 urb
->transfer_buffer_length
))
1234 if (put_user(as
->status
, &userurb
->status
))
1236 if (put_user(urb
->actual_length
, &userurb
->actual_length
))
1238 if (put_user(urb
->error_count
, &userurb
->error_count
))
1241 if (usb_endpoint_xfer_isoc(&urb
->ep
->desc
)) {
1242 for (i
= 0; i
< urb
->number_of_packets
; i
++) {
1243 if (put_user(urb
->iso_frame_desc
[i
].actual_length
,
1244 &userurb
->iso_frame_desc
[i
].actual_length
))
1246 if (put_user(urb
->iso_frame_desc
[i
].status
,
1247 &userurb
->iso_frame_desc
[i
].status
))
1254 if (put_user(addr
, (void __user
* __user
*)arg
))
1259 static struct async
*reap_as(struct dev_state
*ps
)
1261 DECLARE_WAITQUEUE(wait
, current
);
1262 struct async
*as
= NULL
;
1263 struct usb_device
*dev
= ps
->dev
;
1265 add_wait_queue(&ps
->wait
, &wait
);
1267 __set_current_state(TASK_INTERRUPTIBLE
);
1268 as
= async_getcompleted(ps
);
1271 if (signal_pending(current
))
1273 usb_unlock_device(dev
);
1275 usb_lock_device(dev
);
1277 remove_wait_queue(&ps
->wait
, &wait
);
1278 set_current_state(TASK_RUNNING
);
1282 static int proc_reapurb(struct dev_state
*ps
, void __user
*arg
)
1284 struct async
*as
= reap_as(ps
);
1286 return processcompl(as
, (void __user
* __user
*)arg
);
1287 if (signal_pending(current
))
1292 static int proc_reapurbnonblock(struct dev_state
*ps
, void __user
*arg
)
1296 if (!(as
= async_getcompleted(ps
)))
1298 return processcompl(as
, (void __user
* __user
*)arg
);
1301 #ifdef CONFIG_COMPAT
1303 static int get_urb32(struct usbdevfs_urb
*kurb
,
1304 struct usbdevfs_urb32 __user
*uurb
)
1307 if (get_user(kurb
->type
, &uurb
->type
) ||
1308 __get_user(kurb
->endpoint
, &uurb
->endpoint
) ||
1309 __get_user(kurb
->status
, &uurb
->status
) ||
1310 __get_user(kurb
->flags
, &uurb
->flags
) ||
1311 __get_user(kurb
->buffer_length
, &uurb
->buffer_length
) ||
1312 __get_user(kurb
->actual_length
, &uurb
->actual_length
) ||
1313 __get_user(kurb
->start_frame
, &uurb
->start_frame
) ||
1314 __get_user(kurb
->number_of_packets
, &uurb
->number_of_packets
) ||
1315 __get_user(kurb
->error_count
, &uurb
->error_count
) ||
1316 __get_user(kurb
->signr
, &uurb
->signr
))
1319 if (__get_user(uptr
, &uurb
->buffer
))
1321 kurb
->buffer
= compat_ptr(uptr
);
1322 if (__get_user(uptr
, &uurb
->usercontext
))
1324 kurb
->usercontext
= compat_ptr(uptr
);
1329 static int proc_submiturb_compat(struct dev_state
*ps
, void __user
*arg
)
1331 struct usbdevfs_urb uurb
;
1333 if (get_urb32(&uurb
, (struct usbdevfs_urb32 __user
*)arg
))
1336 return proc_do_submiturb(ps
, &uurb
,
1337 ((struct usbdevfs_urb32 __user
*)arg
)->iso_frame_desc
,
1341 static int processcompl_compat(struct async
*as
, void __user
* __user
*arg
)
1343 struct urb
*urb
= as
->urb
;
1344 struct usbdevfs_urb32 __user
*userurb
= as
->userurb
;
1345 void __user
*addr
= as
->userurb
;
1349 if (copy_to_user(as
->userbuffer
, urb
->transfer_buffer
,
1350 urb
->transfer_buffer_length
))
1352 if (put_user(as
->status
, &userurb
->status
))
1354 if (put_user(urb
->actual_length
, &userurb
->actual_length
))
1356 if (put_user(urb
->error_count
, &userurb
->error_count
))
1359 if (usb_endpoint_xfer_isoc(&urb
->ep
->desc
)) {
1360 for (i
= 0; i
< urb
->number_of_packets
; i
++) {
1361 if (put_user(urb
->iso_frame_desc
[i
].actual_length
,
1362 &userurb
->iso_frame_desc
[i
].actual_length
))
1364 if (put_user(urb
->iso_frame_desc
[i
].status
,
1365 &userurb
->iso_frame_desc
[i
].status
))
1371 if (put_user(ptr_to_compat(addr
), (u32 __user
*)arg
))
1376 static int proc_reapurb_compat(struct dev_state
*ps
, void __user
*arg
)
1378 struct async
*as
= reap_as(ps
);
1380 return processcompl_compat(as
, (void __user
* __user
*)arg
);
1381 if (signal_pending(current
))
1386 static int proc_reapurbnonblock_compat(struct dev_state
*ps
, void __user
*arg
)
1390 if (!(as
= async_getcompleted(ps
)))
1392 return processcompl_compat(as
, (void __user
* __user
*)arg
);
1397 static int proc_disconnectsignal(struct dev_state
*ps
, void __user
*arg
)
1399 struct usbdevfs_disconnectsignal ds
;
1401 if (copy_from_user(&ds
, arg
, sizeof(ds
)))
1403 ps
->discsignr
= ds
.signr
;
1404 ps
->disccontext
= ds
.context
;
1408 static int proc_claiminterface(struct dev_state
*ps
, void __user
*arg
)
1412 if (get_user(ifnum
, (unsigned int __user
*)arg
))
1414 return claimintf(ps
, ifnum
);
1417 static int proc_releaseinterface(struct dev_state
*ps
, void __user
*arg
)
1422 if (get_user(ifnum
, (unsigned int __user
*)arg
))
1424 if ((ret
= releaseintf(ps
, ifnum
)) < 0)
1426 destroy_async_on_interface (ps
, ifnum
);
1430 static int proc_ioctl(struct dev_state
*ps
, struct usbdevfs_ioctl
*ctl
)
1435 struct usb_interface
*intf
= NULL
;
1436 struct usb_driver
*driver
= NULL
;
1439 if ((size
= _IOC_SIZE(ctl
->ioctl_code
)) > 0) {
1440 if ((buf
= kmalloc(size
, GFP_KERNEL
)) == NULL
)
1442 if ((_IOC_DIR(ctl
->ioctl_code
) & _IOC_WRITE
)) {
1443 if (copy_from_user(buf
, ctl
->data
, size
)) {
1448 memset(buf
, 0, size
);
1452 if (!connected(ps
)) {
1457 if (ps
->dev
->state
!= USB_STATE_CONFIGURED
)
1458 retval
= -EHOSTUNREACH
;
1459 else if (!(intf
= usb_ifnum_to_if(ps
->dev
, ctl
->ifno
)))
1461 else switch (ctl
->ioctl_code
) {
1463 /* disconnect kernel driver from interface */
1464 case USBDEVFS_DISCONNECT
:
1465 if (intf
->dev
.driver
) {
1466 driver
= to_usb_driver(intf
->dev
.driver
);
1467 dev_dbg(&intf
->dev
, "disconnect by usbfs\n");
1468 usb_driver_release_interface(driver
, intf
);
1473 /* let kernel drivers try to (re)bind to the interface */
1474 case USBDEVFS_CONNECT
:
1475 if (!intf
->dev
.driver
)
1476 retval
= device_attach(&intf
->dev
);
1481 /* talk directly to the interface's driver */
1483 if (intf
->dev
.driver
)
1484 driver
= to_usb_driver(intf
->dev
.driver
);
1485 if (driver
== NULL
|| driver
->ioctl
== NULL
) {
1488 retval
= driver
->ioctl(intf
, ctl
->ioctl_code
, buf
);
1489 if (retval
== -ENOIOCTLCMD
)
1494 /* cleanup and return */
1496 && (_IOC_DIR(ctl
->ioctl_code
) & _IOC_READ
) != 0
1498 && copy_to_user(ctl
->data
, buf
, size
) != 0)
1505 static int proc_ioctl_default(struct dev_state
*ps
, void __user
*arg
)
1507 struct usbdevfs_ioctl ctrl
;
1509 if (copy_from_user(&ctrl
, arg
, sizeof(ctrl
)))
1511 return proc_ioctl(ps
, &ctrl
);
1514 #ifdef CONFIG_COMPAT
1515 static int proc_ioctl_compat(struct dev_state
*ps
, compat_uptr_t arg
)
1517 struct usbdevfs_ioctl32 __user
*uioc
;
1518 struct usbdevfs_ioctl ctrl
;
1521 uioc
= compat_ptr((long)arg
);
1522 if (get_user(ctrl
.ifno
, &uioc
->ifno
) ||
1523 get_user(ctrl
.ioctl_code
, &uioc
->ioctl_code
) ||
1524 __get_user(udata
, &uioc
->data
))
1526 ctrl
.data
= compat_ptr(udata
);
1528 return proc_ioctl(ps
, &ctrl
);
1533 * NOTE: All requests here that have interface numbers as parameters
1534 * are assuming that somehow the configuration has been prevented from
1535 * changing. But there's no mechanism to ensure that...
1537 static int usbdev_ioctl(struct inode
*inode
, struct file
*file
,
1538 unsigned int cmd
, unsigned long arg
)
1540 struct dev_state
*ps
= file
->private_data
;
1541 struct usb_device
*dev
= ps
->dev
;
1542 void __user
*p
= (void __user
*)arg
;
1545 if (!(file
->f_mode
& FMODE_WRITE
))
1547 usb_lock_device(dev
);
1548 if (!connected(ps
)) {
1549 usb_unlock_device(dev
);
1554 case USBDEVFS_CONTROL
:
1555 snoop(&dev
->dev
, "%s: CONTROL\n", __func__
);
1556 ret
= proc_control(ps
, p
);
1558 inode
->i_mtime
= CURRENT_TIME
;
1562 snoop(&dev
->dev
, "%s: BULK\n", __func__
);
1563 ret
= proc_bulk(ps
, p
);
1565 inode
->i_mtime
= CURRENT_TIME
;
1568 case USBDEVFS_RESETEP
:
1569 snoop(&dev
->dev
, "%s: RESETEP\n", __func__
);
1570 ret
= proc_resetep(ps
, p
);
1572 inode
->i_mtime
= CURRENT_TIME
;
1575 case USBDEVFS_RESET
:
1576 snoop(&dev
->dev
, "%s: RESET\n", __func__
);
1577 ret
= proc_resetdevice(ps
);
1580 case USBDEVFS_CLEAR_HALT
:
1581 snoop(&dev
->dev
, "%s: CLEAR_HALT\n", __func__
);
1582 ret
= proc_clearhalt(ps
, p
);
1584 inode
->i_mtime
= CURRENT_TIME
;
1587 case USBDEVFS_GETDRIVER
:
1588 snoop(&dev
->dev
, "%s: GETDRIVER\n", __func__
);
1589 ret
= proc_getdriver(ps
, p
);
1592 case USBDEVFS_CONNECTINFO
:
1593 snoop(&dev
->dev
, "%s: CONNECTINFO\n", __func__
);
1594 ret
= proc_connectinfo(ps
, p
);
1597 case USBDEVFS_SETINTERFACE
:
1598 snoop(&dev
->dev
, "%s: SETINTERFACE\n", __func__
);
1599 ret
= proc_setintf(ps
, p
);
1602 case USBDEVFS_SETCONFIGURATION
:
1603 snoop(&dev
->dev
, "%s: SETCONFIGURATION\n", __func__
);
1604 ret
= proc_setconfig(ps
, p
);
1607 case USBDEVFS_SUBMITURB
:
1608 snoop(&dev
->dev
, "%s: SUBMITURB\n", __func__
);
1609 ret
= proc_submiturb(ps
, p
);
1611 inode
->i_mtime
= CURRENT_TIME
;
1614 #ifdef CONFIG_COMPAT
1616 case USBDEVFS_SUBMITURB32
:
1617 snoop(&dev
->dev
, "%s: SUBMITURB32\n", __func__
);
1618 ret
= proc_submiturb_compat(ps
, p
);
1620 inode
->i_mtime
= CURRENT_TIME
;
1623 case USBDEVFS_REAPURB32
:
1624 snoop(&dev
->dev
, "%s: REAPURB32\n", __func__
);
1625 ret
= proc_reapurb_compat(ps
, p
);
1628 case USBDEVFS_REAPURBNDELAY32
:
1629 snoop(&dev
->dev
, "%s: REAPURBDELAY32\n", __func__
);
1630 ret
= proc_reapurbnonblock_compat(ps
, p
);
1633 case USBDEVFS_IOCTL32
:
1634 snoop(&dev
->dev
, "%s: IOCTL\n", __func__
);
1635 ret
= proc_ioctl_compat(ps
, ptr_to_compat(p
));
1639 case USBDEVFS_DISCARDURB
:
1640 snoop(&dev
->dev
, "%s: DISCARDURB\n", __func__
);
1641 ret
= proc_unlinkurb(ps
, p
);
1644 case USBDEVFS_REAPURB
:
1645 snoop(&dev
->dev
, "%s: REAPURB\n", __func__
);
1646 ret
= proc_reapurb(ps
, p
);
1649 case USBDEVFS_REAPURBNDELAY
:
1650 snoop(&dev
->dev
, "%s: REAPURBDELAY\n", __func__
);
1651 ret
= proc_reapurbnonblock(ps
, p
);
1654 case USBDEVFS_DISCSIGNAL
:
1655 snoop(&dev
->dev
, "%s: DISCSIGNAL\n", __func__
);
1656 ret
= proc_disconnectsignal(ps
, p
);
1659 case USBDEVFS_CLAIMINTERFACE
:
1660 snoop(&dev
->dev
, "%s: CLAIMINTERFACE\n", __func__
);
1661 ret
= proc_claiminterface(ps
, p
);
1664 case USBDEVFS_RELEASEINTERFACE
:
1665 snoop(&dev
->dev
, "%s: RELEASEINTERFACE\n", __func__
);
1666 ret
= proc_releaseinterface(ps
, p
);
1669 case USBDEVFS_IOCTL
:
1670 snoop(&dev
->dev
, "%s: IOCTL\n", __func__
);
1671 ret
= proc_ioctl_default(ps
, p
);
1674 usb_unlock_device(dev
);
1676 inode
->i_atime
= CURRENT_TIME
;
1680 /* No kernel lock - fine */
1681 static unsigned int usbdev_poll(struct file
*file
,
1682 struct poll_table_struct
*wait
)
1684 struct dev_state
*ps
= file
->private_data
;
1685 unsigned int mask
= 0;
1687 poll_wait(file
, &ps
->wait
, wait
);
1688 if (file
->f_mode
& FMODE_WRITE
&& !list_empty(&ps
->async_completed
))
1689 mask
|= POLLOUT
| POLLWRNORM
;
1691 mask
|= POLLERR
| POLLHUP
;
1695 const struct file_operations usbdev_file_operations
= {
1696 .owner
= THIS_MODULE
,
1697 .llseek
= usbdev_lseek
,
1698 .read
= usbdev_read
,
1699 .poll
= usbdev_poll
,
1700 .ioctl
= usbdev_ioctl
,
1701 .open
= usbdev_open
,
1702 .release
= usbdev_release
,
1705 static void usbdev_remove(struct usb_device
*udev
)
1707 struct dev_state
*ps
;
1708 struct siginfo sinfo
;
1710 while (!list_empty(&udev
->filelist
)) {
1711 ps
= list_entry(udev
->filelist
.next
, struct dev_state
, list
);
1712 destroy_all_async(ps
);
1713 wake_up_all(&ps
->wait
);
1714 list_del_init(&ps
->list
);
1715 if (ps
->discsignr
) {
1716 sinfo
.si_signo
= ps
->discsignr
;
1717 sinfo
.si_errno
= EPIPE
;
1718 sinfo
.si_code
= SI_ASYNCIO
;
1719 sinfo
.si_addr
= ps
->disccontext
;
1720 kill_pid_info_as_uid(ps
->discsignr
, &sinfo
,
1721 ps
->disc_pid
, ps
->disc_uid
,
1722 ps
->disc_euid
, ps
->secid
);
1727 #ifdef CONFIG_USB_DEVICE_CLASS
1728 static struct class *usb_classdev_class
;
1730 static int usb_classdev_add(struct usb_device
*dev
)
1732 struct device
*cldev
;
1734 cldev
= device_create(usb_classdev_class
, &dev
->dev
, dev
->dev
.devt
,
1735 NULL
, "usbdev%d.%d", dev
->bus
->busnum
,
1738 return PTR_ERR(cldev
);
1739 dev
->usb_classdev
= cldev
;
1743 static void usb_classdev_remove(struct usb_device
*dev
)
1745 if (dev
->usb_classdev
)
1746 device_unregister(dev
->usb_classdev
);
1750 #define usb_classdev_add(dev) 0
1751 #define usb_classdev_remove(dev) do {} while (0)
1755 static int usbdev_notify(struct notifier_block
*self
,
1756 unsigned long action
, void *dev
)
1759 case USB_DEVICE_ADD
:
1760 if (usb_classdev_add(dev
))
1763 case USB_DEVICE_REMOVE
:
1764 usb_classdev_remove(dev
);
1771 static struct notifier_block usbdev_nb
= {
1772 .notifier_call
= usbdev_notify
,
1775 static struct cdev usb_device_cdev
;
1777 int __init
usb_devio_init(void)
1781 retval
= register_chrdev_region(USB_DEVICE_DEV
, USB_DEVICE_MAX
,
1784 printk(KERN_ERR
"Unable to register minors for usb_device\n");
1787 cdev_init(&usb_device_cdev
, &usbdev_file_operations
);
1788 retval
= cdev_add(&usb_device_cdev
, USB_DEVICE_DEV
, USB_DEVICE_MAX
);
1790 printk(KERN_ERR
"Unable to get usb_device major %d\n",
1794 #ifdef CONFIG_USB_DEVICE_CLASS
1795 usb_classdev_class
= class_create(THIS_MODULE
, "usb_device");
1796 if (IS_ERR(usb_classdev_class
)) {
1797 printk(KERN_ERR
"Unable to register usb_device class\n");
1798 retval
= PTR_ERR(usb_classdev_class
);
1799 cdev_del(&usb_device_cdev
);
1800 usb_classdev_class
= NULL
;
1803 /* devices of this class shadow the major:minor of their parent
1804 * device, so clear ->dev_kobj to prevent adding duplicate entries
1807 usb_classdev_class
->dev_kobj
= NULL
;
1809 usb_register_notify(&usbdev_nb
);
1814 unregister_chrdev_region(USB_DEVICE_DEV
, USB_DEVICE_MAX
);
1818 void usb_devio_cleanup(void)
1820 usb_unregister_notify(&usbdev_nb
);
1821 #ifdef CONFIG_USB_DEVICE_CLASS
1822 class_destroy(usb_classdev_class
);
1824 cdev_del(&usb_device_cdev
);
1825 unregister_chrdev_region(USB_DEVICE_DEV
, USB_DEVICE_MAX
);