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/usb/hcd.h> /* for usbcore internals */
47 #include <linux/cdev.h>
48 #include <linux/notifier.h>
49 #include <linux/security.h>
50 #include <asm/uaccess.h>
51 #include <asm/byteorder.h>
52 #include <linux/moduleparam.h>
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
;
76 u32 disabled_bulk_eps
;
80 struct list_head asynclist
;
86 void __user
*userbuffer
;
95 static int usbfs_snoop
;
96 module_param(usbfs_snoop
, bool, S_IRUGO
| S_IWUSR
);
97 MODULE_PARM_DESC(usbfs_snoop
, "true to log all usbfs traffic");
99 #define snoop(dev, format, arg...) \
102 dev_info(dev , format , ## arg); \
109 #define USB_DEVICE_DEV MKDEV(USB_DEVICE_MAJOR, 0)
111 #define MAX_USBFS_BUFFER_SIZE 16384
114 static int connected(struct dev_state
*ps
)
116 return (!list_empty(&ps
->list
) &&
117 ps
->dev
->state
!= USB_STATE_NOTATTACHED
);
120 static loff_t
usbdev_lseek(struct file
*file
, loff_t offset
, int orig
)
124 mutex_lock(&file
->f_dentry
->d_inode
->i_mutex
);
128 file
->f_pos
= offset
;
132 file
->f_pos
+= offset
;
140 mutex_unlock(&file
->f_dentry
->d_inode
->i_mutex
);
144 static ssize_t
usbdev_read(struct file
*file
, char __user
*buf
, size_t nbytes
,
147 struct dev_state
*ps
= file
->private_data
;
148 struct usb_device
*dev
= ps
->dev
;
155 usb_lock_device(dev
);
156 if (!connected(ps
)) {
159 } else if (pos
< 0) {
164 if (pos
< sizeof(struct usb_device_descriptor
)) {
165 /* 18 bytes - fits on the stack */
166 struct usb_device_descriptor temp_desc
;
168 memcpy(&temp_desc
, &dev
->descriptor
, sizeof(dev
->descriptor
));
169 le16_to_cpus(&temp_desc
.bcdUSB
);
170 le16_to_cpus(&temp_desc
.idVendor
);
171 le16_to_cpus(&temp_desc
.idProduct
);
172 le16_to_cpus(&temp_desc
.bcdDevice
);
174 len
= sizeof(struct usb_device_descriptor
) - pos
;
177 if (copy_to_user(buf
, ((char *)&temp_desc
) + pos
, len
)) {
188 pos
= sizeof(struct usb_device_descriptor
);
189 for (i
= 0; nbytes
&& i
< dev
->descriptor
.bNumConfigurations
; i
++) {
190 struct usb_config_descriptor
*config
=
191 (struct usb_config_descriptor
*)dev
->rawdescriptors
[i
];
192 unsigned int length
= le16_to_cpu(config
->wTotalLength
);
194 if (*ppos
< pos
+ length
) {
196 /* The descriptor may claim to be longer than it
197 * really is. Here is the actual allocated length. */
199 le16_to_cpu(dev
->config
[i
].desc
.wTotalLength
);
201 len
= length
- (*ppos
- pos
);
205 /* Simply don't write (skip over) unallocated parts */
206 if (alloclen
> (*ppos
- pos
)) {
207 alloclen
-= (*ppos
- pos
);
208 if (copy_to_user(buf
,
209 dev
->rawdescriptors
[i
] + (*ppos
- pos
),
210 min(len
, alloclen
))) {
226 usb_unlock_device(dev
);
231 * async list handling
234 static struct async
*alloc_async(unsigned int numisoframes
)
238 as
= kzalloc(sizeof(struct async
), GFP_KERNEL
);
241 as
->urb
= usb_alloc_urb(numisoframes
, GFP_KERNEL
);
249 static void free_async(struct async
*as
)
252 kfree(as
->urb
->transfer_buffer
);
253 kfree(as
->urb
->setup_packet
);
254 usb_free_urb(as
->urb
);
258 static void async_newpending(struct async
*as
)
260 struct dev_state
*ps
= as
->ps
;
263 spin_lock_irqsave(&ps
->lock
, flags
);
264 list_add_tail(&as
->asynclist
, &ps
->async_pending
);
265 spin_unlock_irqrestore(&ps
->lock
, flags
);
268 static void async_removepending(struct async
*as
)
270 struct dev_state
*ps
= as
->ps
;
273 spin_lock_irqsave(&ps
->lock
, flags
);
274 list_del_init(&as
->asynclist
);
275 spin_unlock_irqrestore(&ps
->lock
, flags
);
278 static struct async
*async_getcompleted(struct dev_state
*ps
)
281 struct async
*as
= NULL
;
283 spin_lock_irqsave(&ps
->lock
, flags
);
284 if (!list_empty(&ps
->async_completed
)) {
285 as
= list_entry(ps
->async_completed
.next
, struct async
,
287 list_del_init(&as
->asynclist
);
289 spin_unlock_irqrestore(&ps
->lock
, flags
);
293 static struct async
*async_getpending(struct dev_state
*ps
,
294 void __user
*userurb
)
299 spin_lock_irqsave(&ps
->lock
, flags
);
300 list_for_each_entry(as
, &ps
->async_pending
, asynclist
)
301 if (as
->userurb
== userurb
) {
302 list_del_init(&as
->asynclist
);
303 spin_unlock_irqrestore(&ps
->lock
, flags
);
306 spin_unlock_irqrestore(&ps
->lock
, flags
);
310 static void snoop_urb(struct usb_device
*udev
,
311 void __user
*userurb
, int pipe
, unsigned length
,
312 int timeout_or_status
, enum snoop_when when
,
313 unsigned char *data
, unsigned data_len
)
315 static const char *types
[] = {"isoc", "int", "ctrl", "bulk"};
316 static const char *dirs
[] = {"out", "in"};
323 ep
= usb_pipeendpoint(pipe
);
324 t
= types
[usb_pipetype(pipe
)];
325 d
= dirs
[!!usb_pipein(pipe
)];
327 if (userurb
) { /* Async */
329 dev_info(&udev
->dev
, "userurb %p, ep%d %s-%s, "
331 userurb
, ep
, t
, d
, length
);
333 dev_info(&udev
->dev
, "userurb %p, ep%d %s-%s, "
334 "actual_length %u status %d\n",
335 userurb
, ep
, t
, d
, length
,
339 dev_info(&udev
->dev
, "ep%d %s-%s, length %u, "
341 ep
, t
, d
, length
, timeout_or_status
);
343 dev_info(&udev
->dev
, "ep%d %s-%s, actual_length %u, "
345 ep
, t
, d
, length
, timeout_or_status
);
348 if (data
&& data_len
> 0) {
349 print_hex_dump(KERN_DEBUG
, "data: ", DUMP_PREFIX_NONE
, 32, 1,
354 #define AS_CONTINUATION 1
357 static void cancel_bulk_urbs(struct dev_state
*ps
, unsigned bulk_addr
)
363 /* Mark all the pending URBs that match bulk_addr, up to but not
364 * including the first one without AS_CONTINUATION. If such an
365 * URB is encountered then a new transfer has already started so
366 * the endpoint doesn't need to be disabled; otherwise it does.
368 list_for_each_entry(as
, &ps
->async_pending
, asynclist
) {
369 if (as
->bulk_addr
== bulk_addr
) {
370 if (as
->bulk_status
!= AS_CONTINUATION
)
372 as
->bulk_status
= AS_UNLINK
;
376 ps
->disabled_bulk_eps
|= (1 << bulk_addr
);
378 /* Now carefully unlink all the marked pending URBs */
380 list_for_each_entry(as
, &ps
->async_pending
, asynclist
) {
381 if (as
->bulk_status
== AS_UNLINK
) {
382 as
->bulk_status
= 0; /* Only once */
383 spin_unlock(&ps
->lock
); /* Allow completions */
384 usb_unlink_urb(as
->urb
);
385 spin_lock(&ps
->lock
);
391 static void async_completed(struct urb
*urb
)
393 struct async
*as
= urb
->context
;
394 struct dev_state
*ps
= as
->ps
;
395 struct siginfo sinfo
;
396 struct pid
*pid
= NULL
;
402 spin_lock(&ps
->lock
);
403 list_move_tail(&as
->asynclist
, &ps
->async_completed
);
404 as
->status
= urb
->status
;
407 sinfo
.si_signo
= as
->signr
;
408 sinfo
.si_errno
= as
->status
;
409 sinfo
.si_code
= SI_ASYNCIO
;
410 sinfo
.si_addr
= as
->userurb
;
416 snoop(&urb
->dev
->dev
, "urb complete\n");
417 snoop_urb(urb
->dev
, as
->userurb
, urb
->pipe
, urb
->actual_length
,
418 as
->status
, COMPLETE
,
419 ((urb
->transfer_flags
& URB_DIR_MASK
) == USB_DIR_OUT
) ?
420 NULL
: urb
->transfer_buffer
, urb
->actual_length
);
421 if (as
->status
< 0 && as
->bulk_addr
&& as
->status
!= -ECONNRESET
&&
422 as
->status
!= -ENOENT
)
423 cancel_bulk_urbs(ps
, as
->bulk_addr
);
424 spin_unlock(&ps
->lock
);
427 kill_pid_info_as_uid(sinfo
.si_signo
, &sinfo
, pid
, uid
,
433 static void destroy_async(struct dev_state
*ps
, struct list_head
*list
)
438 spin_lock_irqsave(&ps
->lock
, flags
);
439 while (!list_empty(list
)) {
440 as
= list_entry(list
->next
, struct async
, asynclist
);
441 list_del_init(&as
->asynclist
);
443 /* drop the spinlock so the completion handler can run */
444 spin_unlock_irqrestore(&ps
->lock
, flags
);
445 usb_kill_urb(as
->urb
);
446 spin_lock_irqsave(&ps
->lock
, flags
);
448 spin_unlock_irqrestore(&ps
->lock
, flags
);
451 static void destroy_async_on_interface(struct dev_state
*ps
,
454 struct list_head
*p
, *q
, hitlist
;
457 INIT_LIST_HEAD(&hitlist
);
458 spin_lock_irqsave(&ps
->lock
, flags
);
459 list_for_each_safe(p
, q
, &ps
->async_pending
)
460 if (ifnum
== list_entry(p
, struct async
, asynclist
)->ifnum
)
461 list_move_tail(p
, &hitlist
);
462 spin_unlock_irqrestore(&ps
->lock
, flags
);
463 destroy_async(ps
, &hitlist
);
466 static void destroy_all_async(struct dev_state
*ps
)
468 destroy_async(ps
, &ps
->async_pending
);
472 * interface claims are made only at the request of user level code,
473 * which can also release them (explicitly or by closing files).
474 * they're also undone when devices disconnect.
477 static int driver_probe(struct usb_interface
*intf
,
478 const struct usb_device_id
*id
)
483 static void driver_disconnect(struct usb_interface
*intf
)
485 struct dev_state
*ps
= usb_get_intfdata(intf
);
486 unsigned int ifnum
= intf
->altsetting
->desc
.bInterfaceNumber
;
491 /* NOTE: this relies on usbcore having canceled and completed
492 * all pending I/O requests; 2.6 does that.
495 if (likely(ifnum
< 8*sizeof(ps
->ifclaimed
)))
496 clear_bit(ifnum
, &ps
->ifclaimed
);
498 dev_warn(&intf
->dev
, "interface number %u out of range\n",
501 usb_set_intfdata(intf
, NULL
);
503 /* force async requests to complete */
504 destroy_async_on_interface(ps
, ifnum
);
507 /* The following routines are merely placeholders. There is no way
508 * to inform a user task about suspend or resumes.
510 static int driver_suspend(struct usb_interface
*intf
, pm_message_t msg
)
515 static int driver_resume(struct usb_interface
*intf
)
520 struct usb_driver usbfs_driver
= {
522 .probe
= driver_probe
,
523 .disconnect
= driver_disconnect
,
524 .suspend
= driver_suspend
,
525 .resume
= driver_resume
,
528 static int claimintf(struct dev_state
*ps
, unsigned int ifnum
)
530 struct usb_device
*dev
= ps
->dev
;
531 struct usb_interface
*intf
;
534 if (ifnum
>= 8*sizeof(ps
->ifclaimed
))
536 /* already claimed */
537 if (test_bit(ifnum
, &ps
->ifclaimed
))
540 intf
= usb_ifnum_to_if(dev
, ifnum
);
544 err
= usb_driver_claim_interface(&usbfs_driver
, intf
, ps
);
546 set_bit(ifnum
, &ps
->ifclaimed
);
550 static int releaseintf(struct dev_state
*ps
, unsigned int ifnum
)
552 struct usb_device
*dev
;
553 struct usb_interface
*intf
;
557 if (ifnum
>= 8*sizeof(ps
->ifclaimed
))
560 intf
= usb_ifnum_to_if(dev
, ifnum
);
563 else if (test_and_clear_bit(ifnum
, &ps
->ifclaimed
)) {
564 usb_driver_release_interface(&usbfs_driver
, intf
);
570 static int checkintf(struct dev_state
*ps
, unsigned int ifnum
)
572 if (ps
->dev
->state
!= USB_STATE_CONFIGURED
)
573 return -EHOSTUNREACH
;
574 if (ifnum
>= 8*sizeof(ps
->ifclaimed
))
576 if (test_bit(ifnum
, &ps
->ifclaimed
))
578 /* if not yet claimed, claim it for the driver */
579 dev_warn(&ps
->dev
->dev
, "usbfs: process %d (%s) did not claim "
580 "interface %u before use\n", task_pid_nr(current
),
581 current
->comm
, ifnum
);
582 return claimintf(ps
, ifnum
);
585 static int findintfep(struct usb_device
*dev
, unsigned int ep
)
587 unsigned int i
, j
, e
;
588 struct usb_interface
*intf
;
589 struct usb_host_interface
*alts
;
590 struct usb_endpoint_descriptor
*endpt
;
592 if (ep
& ~(USB_DIR_IN
|0xf))
596 for (i
= 0; i
< dev
->actconfig
->desc
.bNumInterfaces
; i
++) {
597 intf
= dev
->actconfig
->interface
[i
];
598 for (j
= 0; j
< intf
->num_altsetting
; j
++) {
599 alts
= &intf
->altsetting
[j
];
600 for (e
= 0; e
< alts
->desc
.bNumEndpoints
; e
++) {
601 endpt
= &alts
->endpoint
[e
].desc
;
602 if (endpt
->bEndpointAddress
== ep
)
603 return alts
->desc
.bInterfaceNumber
;
610 static int check_ctrlrecip(struct dev_state
*ps
, unsigned int requesttype
,
615 if (ps
->dev
->state
!= USB_STATE_UNAUTHENTICATED
616 && ps
->dev
->state
!= USB_STATE_ADDRESS
617 && ps
->dev
->state
!= USB_STATE_CONFIGURED
)
618 return -EHOSTUNREACH
;
619 if (USB_TYPE_VENDOR
== (USB_TYPE_MASK
& requesttype
))
623 switch (requesttype
& USB_RECIP_MASK
) {
624 case USB_RECIP_ENDPOINT
:
625 ret
= findintfep(ps
->dev
, index
);
627 ret
= checkintf(ps
, ret
);
630 case USB_RECIP_INTERFACE
:
631 ret
= checkintf(ps
, index
);
637 static int match_devt(struct device
*dev
, void *data
)
639 return dev
->devt
== (dev_t
) (unsigned long) data
;
642 static struct usb_device
*usbdev_lookup_by_devt(dev_t devt
)
646 dev
= bus_find_device(&usb_bus_type
, NULL
,
647 (void *) (unsigned long) devt
, match_devt
);
650 return container_of(dev
, struct usb_device
, dev
);
656 static int usbdev_open(struct inode
*inode
, struct file
*file
)
658 struct usb_device
*dev
= NULL
;
659 struct dev_state
*ps
;
660 const struct cred
*cred
= current_cred();
664 ps
= kmalloc(sizeof(struct dev_state
), GFP_KERNEL
);
670 /* Protect against simultaneous removal or release */
671 mutex_lock(&usbfs_mutex
);
673 /* usbdev device-node */
674 if (imajor(inode
) == USB_DEVICE_MAJOR
)
675 dev
= usbdev_lookup_by_devt(inode
->i_rdev
);
677 #ifdef CONFIG_USB_DEVICEFS
680 dev
= inode
->i_private
;
681 if (dev
&& dev
->usbfs_dentry
&&
682 dev
->usbfs_dentry
->d_inode
== inode
)
688 mutex_unlock(&usbfs_mutex
);
693 usb_lock_device(dev
);
694 if (dev
->state
== USB_STATE_NOTATTACHED
)
695 goto out_unlock_device
;
697 ret
= usb_autoresume_device(dev
);
699 goto out_unlock_device
;
703 spin_lock_init(&ps
->lock
);
704 INIT_LIST_HEAD(&ps
->list
);
705 INIT_LIST_HEAD(&ps
->async_pending
);
706 INIT_LIST_HEAD(&ps
->async_completed
);
707 init_waitqueue_head(&ps
->wait
);
709 ps
->disc_pid
= get_pid(task_pid(current
));
710 ps
->disc_uid
= cred
->uid
;
711 ps
->disc_euid
= cred
->euid
;
712 ps
->disccontext
= NULL
;
714 security_task_getsecid(current
, &ps
->secid
);
716 list_add_tail(&ps
->list
, &dev
->filelist
);
717 file
->private_data
= ps
;
718 usb_unlock_device(dev
);
719 snoop(&dev
->dev
, "opened by process %d: %s\n", task_pid_nr(current
),
724 usb_unlock_device(dev
);
731 static int usbdev_release(struct inode
*inode
, struct file
*file
)
733 struct dev_state
*ps
= file
->private_data
;
734 struct usb_device
*dev
= ps
->dev
;
738 usb_lock_device(dev
);
739 usb_hub_release_all_ports(dev
, ps
);
741 list_del_init(&ps
->list
);
743 for (ifnum
= 0; ps
->ifclaimed
&& ifnum
< 8*sizeof(ps
->ifclaimed
);
745 if (test_bit(ifnum
, &ps
->ifclaimed
))
746 releaseintf(ps
, ifnum
);
748 destroy_all_async(ps
);
749 usb_autosuspend_device(dev
);
750 usb_unlock_device(dev
);
752 put_pid(ps
->disc_pid
);
754 as
= async_getcompleted(ps
);
757 as
= async_getcompleted(ps
);
763 static int proc_control(struct dev_state
*ps
, void __user
*arg
)
765 struct usb_device
*dev
= ps
->dev
;
766 struct usbdevfs_ctrltransfer ctrl
;
772 if (copy_from_user(&ctrl
, arg
, sizeof(ctrl
)))
774 ret
= check_ctrlrecip(ps
, ctrl
.bRequestType
, ctrl
.wIndex
);
777 wLength
= ctrl
.wLength
; /* To suppress 64k PAGE_SIZE warning */
778 if (wLength
> PAGE_SIZE
)
780 tbuf
= (unsigned char *)__get_free_page(GFP_KERNEL
);
784 snoop(&dev
->dev
, "control urb: bRequestType=%02x "
785 "bRequest=%02x wValue=%04x "
786 "wIndex=%04x wLength=%04x\n",
787 ctrl
.bRequestType
, ctrl
.bRequest
,
788 __le16_to_cpup(&ctrl
.wValue
),
789 __le16_to_cpup(&ctrl
.wIndex
),
790 __le16_to_cpup(&ctrl
.wLength
));
791 if (ctrl
.bRequestType
& 0x80) {
792 if (ctrl
.wLength
&& !access_ok(VERIFY_WRITE
, ctrl
.data
,
794 free_page((unsigned long)tbuf
);
797 pipe
= usb_rcvctrlpipe(dev
, 0);
798 snoop_urb(dev
, NULL
, pipe
, ctrl
.wLength
, tmo
, SUBMIT
, NULL
, 0);
800 usb_unlock_device(dev
);
801 i
= usb_control_msg(dev
, pipe
, ctrl
.bRequest
,
802 ctrl
.bRequestType
, ctrl
.wValue
, ctrl
.wIndex
,
803 tbuf
, ctrl
.wLength
, tmo
);
804 usb_lock_device(dev
);
805 snoop_urb(dev
, NULL
, pipe
, max(i
, 0), min(i
, 0), COMPLETE
,
807 if ((i
> 0) && ctrl
.wLength
) {
808 if (copy_to_user(ctrl
.data
, tbuf
, i
)) {
809 free_page((unsigned long)tbuf
);
815 if (copy_from_user(tbuf
, ctrl
.data
, ctrl
.wLength
)) {
816 free_page((unsigned long)tbuf
);
820 pipe
= usb_sndctrlpipe(dev
, 0);
821 snoop_urb(dev
, NULL
, pipe
, ctrl
.wLength
, tmo
, SUBMIT
,
824 usb_unlock_device(dev
);
825 i
= usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0), ctrl
.bRequest
,
826 ctrl
.bRequestType
, ctrl
.wValue
, ctrl
.wIndex
,
827 tbuf
, ctrl
.wLength
, tmo
);
828 usb_lock_device(dev
);
829 snoop_urb(dev
, NULL
, pipe
, max(i
, 0), min(i
, 0), COMPLETE
, NULL
, 0);
831 free_page((unsigned long)tbuf
);
832 if (i
< 0 && i
!= -EPIPE
) {
833 dev_printk(KERN_DEBUG
, &dev
->dev
, "usbfs: USBDEVFS_CONTROL "
834 "failed cmd %s rqt %u rq %u len %u ret %d\n",
835 current
->comm
, ctrl
.bRequestType
, ctrl
.bRequest
,
841 static int proc_bulk(struct dev_state
*ps
, void __user
*arg
)
843 struct usb_device
*dev
= ps
->dev
;
844 struct usbdevfs_bulktransfer bulk
;
845 unsigned int tmo
, len1
, pipe
;
850 if (copy_from_user(&bulk
, arg
, sizeof(bulk
)))
852 ret
= findintfep(ps
->dev
, bulk
.ep
);
855 ret
= checkintf(ps
, ret
);
858 if (bulk
.ep
& USB_DIR_IN
)
859 pipe
= usb_rcvbulkpipe(dev
, bulk
.ep
& 0x7f);
861 pipe
= usb_sndbulkpipe(dev
, bulk
.ep
& 0x7f);
862 if (!usb_maxpacket(dev
, pipe
, !(bulk
.ep
& USB_DIR_IN
)))
865 if (len1
> MAX_USBFS_BUFFER_SIZE
)
867 if (!(tbuf
= kmalloc(len1
, GFP_KERNEL
)))
870 if (bulk
.ep
& 0x80) {
871 if (len1
&& !access_ok(VERIFY_WRITE
, bulk
.data
, len1
)) {
875 snoop_urb(dev
, NULL
, pipe
, len1
, tmo
, SUBMIT
, NULL
, 0);
877 usb_unlock_device(dev
);
878 i
= usb_bulk_msg(dev
, pipe
, tbuf
, len1
, &len2
, tmo
);
879 usb_lock_device(dev
);
880 snoop_urb(dev
, NULL
, pipe
, len2
, i
, COMPLETE
, tbuf
, len2
);
883 if (copy_to_user(bulk
.data
, tbuf
, len2
)) {
890 if (copy_from_user(tbuf
, bulk
.data
, len1
)) {
895 snoop_urb(dev
, NULL
, pipe
, len1
, tmo
, SUBMIT
, tbuf
, len1
);
897 usb_unlock_device(dev
);
898 i
= usb_bulk_msg(dev
, pipe
, tbuf
, len1
, &len2
, tmo
);
899 usb_lock_device(dev
);
900 snoop_urb(dev
, NULL
, pipe
, len2
, i
, COMPLETE
, NULL
, 0);
908 static int proc_resetep(struct dev_state
*ps
, void __user
*arg
)
913 if (get_user(ep
, (unsigned int __user
*)arg
))
915 ret
= findintfep(ps
->dev
, ep
);
918 ret
= checkintf(ps
, ret
);
921 usb_reset_endpoint(ps
->dev
, ep
);
925 static int proc_clearhalt(struct dev_state
*ps
, void __user
*arg
)
931 if (get_user(ep
, (unsigned int __user
*)arg
))
933 ret
= findintfep(ps
->dev
, ep
);
936 ret
= checkintf(ps
, ret
);
940 pipe
= usb_rcvbulkpipe(ps
->dev
, ep
& 0x7f);
942 pipe
= usb_sndbulkpipe(ps
->dev
, ep
& 0x7f);
944 return usb_clear_halt(ps
->dev
, pipe
);
947 static int proc_getdriver(struct dev_state
*ps
, void __user
*arg
)
949 struct usbdevfs_getdriver gd
;
950 struct usb_interface
*intf
;
953 if (copy_from_user(&gd
, arg
, sizeof(gd
)))
955 intf
= usb_ifnum_to_if(ps
->dev
, gd
.interface
);
956 if (!intf
|| !intf
->dev
.driver
)
959 strncpy(gd
.driver
, intf
->dev
.driver
->name
,
961 ret
= (copy_to_user(arg
, &gd
, sizeof(gd
)) ? -EFAULT
: 0);
966 static int proc_connectinfo(struct dev_state
*ps
, void __user
*arg
)
968 struct usbdevfs_connectinfo ci
;
970 ci
.devnum
= ps
->dev
->devnum
;
971 ci
.slow
= ps
->dev
->speed
== USB_SPEED_LOW
;
972 if (copy_to_user(arg
, &ci
, sizeof(ci
)))
977 static int proc_resetdevice(struct dev_state
*ps
)
979 return usb_reset_device(ps
->dev
);
982 static int proc_setintf(struct dev_state
*ps
, void __user
*arg
)
984 struct usbdevfs_setinterface setintf
;
987 if (copy_from_user(&setintf
, arg
, sizeof(setintf
)))
989 if ((ret
= checkintf(ps
, setintf
.interface
)))
991 return usb_set_interface(ps
->dev
, setintf
.interface
,
995 static int proc_setconfig(struct dev_state
*ps
, void __user
*arg
)
999 struct usb_host_config
*actconfig
;
1001 if (get_user(u
, (int __user
*)arg
))
1004 actconfig
= ps
->dev
->actconfig
;
1006 /* Don't touch the device if any interfaces are claimed.
1007 * It could interfere with other drivers' operations, and if
1008 * an interface is claimed by usbfs it could easily deadlock.
1013 for (i
= 0; i
< actconfig
->desc
.bNumInterfaces
; ++i
) {
1014 if (usb_interface_claimed(actconfig
->interface
[i
])) {
1015 dev_warn(&ps
->dev
->dev
,
1016 "usbfs: interface %d claimed by %s "
1017 "while '%s' sets config #%d\n",
1018 actconfig
->interface
[i
]
1020 ->desc
.bInterfaceNumber
,
1021 actconfig
->interface
[i
]
1030 /* SET_CONFIGURATION is often abused as a "cheap" driver reset,
1031 * so avoid usb_set_configuration()'s kick to sysfs
1034 if (actconfig
&& actconfig
->desc
.bConfigurationValue
== u
)
1035 status
= usb_reset_configuration(ps
->dev
);
1037 status
= usb_set_configuration(ps
->dev
, u
);
1043 static int proc_do_submiturb(struct dev_state
*ps
, struct usbdevfs_urb
*uurb
,
1044 struct usbdevfs_iso_packet_desc __user
*iso_frame_desc
,
1047 struct usbdevfs_iso_packet_desc
*isopkt
= NULL
;
1048 struct usb_host_endpoint
*ep
;
1050 struct usb_ctrlrequest
*dr
= NULL
;
1051 const struct cred
*cred
= current_cred();
1052 unsigned int u
, totlen
, isofrmlen
;
1053 int ret
, ifnum
= -1;
1056 if (uurb
->flags
& ~(USBDEVFS_URB_ISO_ASAP
|
1057 USBDEVFS_URB_SHORT_NOT_OK
|
1058 USBDEVFS_URB_BULK_CONTINUATION
|
1059 USBDEVFS_URB_NO_FSBR
|
1060 USBDEVFS_URB_ZERO_PACKET
|
1061 USBDEVFS_URB_NO_INTERRUPT
))
1063 if (uurb
->buffer_length
> 0 && !uurb
->buffer
)
1065 if (!(uurb
->type
== USBDEVFS_URB_TYPE_CONTROL
&&
1066 (uurb
->endpoint
& ~USB_ENDPOINT_DIR_MASK
) == 0)) {
1067 ifnum
= findintfep(ps
->dev
, uurb
->endpoint
);
1070 ret
= checkintf(ps
, ifnum
);
1074 if ((uurb
->endpoint
& USB_ENDPOINT_DIR_MASK
) != 0) {
1076 ep
= ps
->dev
->ep_in
[uurb
->endpoint
& USB_ENDPOINT_NUMBER_MASK
];
1079 ep
= ps
->dev
->ep_out
[uurb
->endpoint
& USB_ENDPOINT_NUMBER_MASK
];
1083 switch(uurb
->type
) {
1084 case USBDEVFS_URB_TYPE_CONTROL
:
1085 if (!usb_endpoint_xfer_control(&ep
->desc
))
1087 /* min 8 byte setup packet,
1088 * max 8 byte setup plus an arbitrary data stage */
1089 if (uurb
->buffer_length
< 8 ||
1090 uurb
->buffer_length
> (8 + MAX_USBFS_BUFFER_SIZE
))
1092 dr
= kmalloc(sizeof(struct usb_ctrlrequest
), GFP_KERNEL
);
1095 if (copy_from_user(dr
, uurb
->buffer
, 8)) {
1099 if (uurb
->buffer_length
< (le16_to_cpup(&dr
->wLength
) + 8)) {
1103 ret
= check_ctrlrecip(ps
, dr
->bRequestType
,
1104 le16_to_cpup(&dr
->wIndex
));
1109 uurb
->number_of_packets
= 0;
1110 uurb
->buffer_length
= le16_to_cpup(&dr
->wLength
);
1112 if ((dr
->bRequestType
& USB_DIR_IN
) && uurb
->buffer_length
) {
1114 uurb
->endpoint
|= USB_DIR_IN
;
1117 uurb
->endpoint
&= ~USB_DIR_IN
;
1119 snoop(&ps
->dev
->dev
, "control urb: bRequestType=%02x "
1120 "bRequest=%02x wValue=%04x "
1121 "wIndex=%04x wLength=%04x\n",
1122 dr
->bRequestType
, dr
->bRequest
,
1123 __le16_to_cpup(&dr
->wValue
),
1124 __le16_to_cpup(&dr
->wIndex
),
1125 __le16_to_cpup(&dr
->wLength
));
1128 case USBDEVFS_URB_TYPE_BULK
:
1129 switch (usb_endpoint_type(&ep
->desc
)) {
1130 case USB_ENDPOINT_XFER_CONTROL
:
1131 case USB_ENDPOINT_XFER_ISOC
:
1133 case USB_ENDPOINT_XFER_INT
:
1134 /* allow single-shot interrupt transfers */
1135 uurb
->type
= USBDEVFS_URB_TYPE_INTERRUPT
;
1138 uurb
->number_of_packets
= 0;
1139 if (uurb
->buffer_length
> MAX_USBFS_BUFFER_SIZE
)
1143 case USBDEVFS_URB_TYPE_INTERRUPT
:
1144 if (!usb_endpoint_xfer_int(&ep
->desc
))
1147 uurb
->number_of_packets
= 0;
1148 if (uurb
->buffer_length
> MAX_USBFS_BUFFER_SIZE
)
1152 case USBDEVFS_URB_TYPE_ISO
:
1153 /* arbitrary limit */
1154 if (uurb
->number_of_packets
< 1 ||
1155 uurb
->number_of_packets
> 128)
1157 if (!usb_endpoint_xfer_isoc(&ep
->desc
))
1159 isofrmlen
= sizeof(struct usbdevfs_iso_packet_desc
) *
1160 uurb
->number_of_packets
;
1161 if (!(isopkt
= kmalloc(isofrmlen
, GFP_KERNEL
)))
1163 if (copy_from_user(isopkt
, iso_frame_desc
, isofrmlen
)) {
1167 for (totlen
= u
= 0; u
< uurb
->number_of_packets
; u
++) {
1169 * sufficient for USB 2.0 high-bandwidth iso */
1170 if (isopkt
[u
].length
> 8192) {
1174 totlen
+= isopkt
[u
].length
;
1176 /* 3072 * 64 microframes */
1177 if (totlen
> 196608) {
1181 uurb
->buffer_length
= totlen
;
1187 if (uurb
->buffer_length
> 0 &&
1188 !access_ok(is_in
? VERIFY_WRITE
: VERIFY_READ
,
1189 uurb
->buffer
, uurb
->buffer_length
)) {
1194 as
= alloc_async(uurb
->number_of_packets
);
1200 if (uurb
->buffer_length
> 0) {
1201 as
->urb
->transfer_buffer
= kmalloc(uurb
->buffer_length
,
1203 if (!as
->urb
->transfer_buffer
) {
1209 /* Isochronous input data may end up being discontiguous
1210 * if some of the packets are short. Clear the buffer so
1211 * that the gaps don't leak kernel data to userspace.
1213 if (is_in
&& uurb
->type
== USBDEVFS_URB_TYPE_ISO
)
1214 memset(as
->urb
->transfer_buffer
, 0,
1215 uurb
->buffer_length
);
1217 as
->urb
->dev
= ps
->dev
;
1218 as
->urb
->pipe
= (uurb
->type
<< 30) |
1219 __create_pipe(ps
->dev
, uurb
->endpoint
& 0xf) |
1220 (uurb
->endpoint
& USB_DIR_IN
);
1222 /* This tedious sequence is necessary because the URB_* flags
1223 * are internal to the kernel and subject to change, whereas
1224 * the USBDEVFS_URB_* flags are a user API and must not be changed.
1226 u
= (is_in
? URB_DIR_IN
: URB_DIR_OUT
);
1227 if (uurb
->flags
& USBDEVFS_URB_ISO_ASAP
)
1229 if (uurb
->flags
& USBDEVFS_URB_SHORT_NOT_OK
)
1230 u
|= URB_SHORT_NOT_OK
;
1231 if (uurb
->flags
& USBDEVFS_URB_NO_FSBR
)
1233 if (uurb
->flags
& USBDEVFS_URB_ZERO_PACKET
)
1234 u
|= URB_ZERO_PACKET
;
1235 if (uurb
->flags
& USBDEVFS_URB_NO_INTERRUPT
)
1236 u
|= URB_NO_INTERRUPT
;
1237 as
->urb
->transfer_flags
= u
;
1239 as
->urb
->transfer_buffer_length
= uurb
->buffer_length
;
1240 as
->urb
->setup_packet
= (unsigned char *)dr
;
1241 as
->urb
->start_frame
= uurb
->start_frame
;
1242 as
->urb
->number_of_packets
= uurb
->number_of_packets
;
1243 if (uurb
->type
== USBDEVFS_URB_TYPE_ISO
||
1244 ps
->dev
->speed
== USB_SPEED_HIGH
)
1245 as
->urb
->interval
= 1 << min(15, ep
->desc
.bInterval
- 1);
1247 as
->urb
->interval
= ep
->desc
.bInterval
;
1248 as
->urb
->context
= as
;
1249 as
->urb
->complete
= async_completed
;
1250 for (totlen
= u
= 0; u
< uurb
->number_of_packets
; u
++) {
1251 as
->urb
->iso_frame_desc
[u
].offset
= totlen
;
1252 as
->urb
->iso_frame_desc
[u
].length
= isopkt
[u
].length
;
1253 totlen
+= isopkt
[u
].length
;
1258 if (is_in
&& uurb
->buffer_length
> 0)
1259 as
->userbuffer
= uurb
->buffer
;
1261 as
->userbuffer
= NULL
;
1262 as
->signr
= uurb
->signr
;
1264 as
->pid
= get_pid(task_pid(current
));
1265 as
->uid
= cred
->uid
;
1266 as
->euid
= cred
->euid
;
1267 security_task_getsecid(current
, &as
->secid
);
1268 if (!is_in
&& uurb
->buffer_length
> 0) {
1269 if (copy_from_user(as
->urb
->transfer_buffer
, uurb
->buffer
,
1270 uurb
->buffer_length
)) {
1275 snoop_urb(ps
->dev
, as
->userurb
, as
->urb
->pipe
,
1276 as
->urb
->transfer_buffer_length
, 0, SUBMIT
,
1277 is_in
? NULL
: as
->urb
->transfer_buffer
,
1278 uurb
->buffer_length
);
1279 async_newpending(as
);
1281 if (usb_endpoint_xfer_bulk(&ep
->desc
)) {
1282 spin_lock_irq(&ps
->lock
);
1284 /* Not exactly the endpoint address; the direction bit is
1285 * shifted to the 0x10 position so that the value will be
1288 as
->bulk_addr
= usb_endpoint_num(&ep
->desc
) |
1289 ((ep
->desc
.bEndpointAddress
& USB_ENDPOINT_DIR_MASK
)
1292 /* If this bulk URB is the start of a new transfer, re-enable
1293 * the endpoint. Otherwise mark it as a continuation URB.
1295 if (uurb
->flags
& USBDEVFS_URB_BULK_CONTINUATION
)
1296 as
->bulk_status
= AS_CONTINUATION
;
1298 ps
->disabled_bulk_eps
&= ~(1 << as
->bulk_addr
);
1300 /* Don't accept continuation URBs if the endpoint is
1301 * disabled because of an earlier error.
1303 if (ps
->disabled_bulk_eps
& (1 << as
->bulk_addr
))
1306 ret
= usb_submit_urb(as
->urb
, GFP_ATOMIC
);
1307 spin_unlock_irq(&ps
->lock
);
1309 ret
= usb_submit_urb(as
->urb
, GFP_KERNEL
);
1313 dev_printk(KERN_DEBUG
, &ps
->dev
->dev
,
1314 "usbfs: usb_submit_urb returned %d\n", ret
);
1315 snoop_urb(ps
->dev
, as
->userurb
, as
->urb
->pipe
,
1316 0, ret
, COMPLETE
, NULL
, 0);
1317 async_removepending(as
);
1324 static int proc_submiturb(struct dev_state
*ps
, void __user
*arg
)
1326 struct usbdevfs_urb uurb
;
1328 if (copy_from_user(&uurb
, arg
, sizeof(uurb
)))
1331 return proc_do_submiturb(ps
, &uurb
,
1332 (((struct usbdevfs_urb __user
*)arg
)->iso_frame_desc
),
1336 static int proc_unlinkurb(struct dev_state
*ps
, void __user
*arg
)
1340 as
= async_getpending(ps
, arg
);
1343 usb_kill_urb(as
->urb
);
1347 static int processcompl(struct async
*as
, void __user
* __user
*arg
)
1349 struct urb
*urb
= as
->urb
;
1350 struct usbdevfs_urb __user
*userurb
= as
->userurb
;
1351 void __user
*addr
= as
->userurb
;
1354 if (as
->userbuffer
&& urb
->actual_length
) {
1355 if (urb
->number_of_packets
> 0) /* Isochronous */
1356 i
= urb
->transfer_buffer_length
;
1358 i
= urb
->actual_length
;
1359 if (copy_to_user(as
->userbuffer
, urb
->transfer_buffer
, i
))
1362 if (put_user(as
->status
, &userurb
->status
))
1364 if (put_user(urb
->actual_length
, &userurb
->actual_length
))
1366 if (put_user(urb
->error_count
, &userurb
->error_count
))
1369 if (usb_endpoint_xfer_isoc(&urb
->ep
->desc
)) {
1370 for (i
= 0; i
< urb
->number_of_packets
; i
++) {
1371 if (put_user(urb
->iso_frame_desc
[i
].actual_length
,
1372 &userurb
->iso_frame_desc
[i
].actual_length
))
1374 if (put_user(urb
->iso_frame_desc
[i
].status
,
1375 &userurb
->iso_frame_desc
[i
].status
))
1380 if (put_user(addr
, (void __user
* __user
*)arg
))
1388 static struct async
*reap_as(struct dev_state
*ps
)
1390 DECLARE_WAITQUEUE(wait
, current
);
1391 struct async
*as
= NULL
;
1392 struct usb_device
*dev
= ps
->dev
;
1394 add_wait_queue(&ps
->wait
, &wait
);
1396 __set_current_state(TASK_INTERRUPTIBLE
);
1397 as
= async_getcompleted(ps
);
1400 if (signal_pending(current
))
1402 usb_unlock_device(dev
);
1404 usb_lock_device(dev
);
1406 remove_wait_queue(&ps
->wait
, &wait
);
1407 set_current_state(TASK_RUNNING
);
1411 static int proc_reapurb(struct dev_state
*ps
, void __user
*arg
)
1413 struct async
*as
= reap_as(ps
);
1415 int retval
= processcompl(as
, (void __user
* __user
*)arg
);
1419 if (signal_pending(current
))
1424 static int proc_reapurbnonblock(struct dev_state
*ps
, void __user
*arg
)
1429 as
= async_getcompleted(ps
);
1432 retval
= processcompl(as
, (void __user
* __user
*)arg
);
1438 #ifdef CONFIG_COMPAT
1439 static int proc_control_compat(struct dev_state
*ps
,
1440 struct usbdevfs_ctrltransfer32 __user
*p32
)
1442 struct usbdevfs_ctrltransfer __user
*p
;
1444 p
= compat_alloc_user_space(sizeof(*p
));
1445 if (copy_in_user(p
, p32
, (sizeof(*p32
) - sizeof(compat_caddr_t
))) ||
1446 get_user(udata
, &p32
->data
) ||
1447 put_user(compat_ptr(udata
), &p
->data
))
1449 return proc_control(ps
, p
);
1452 static int proc_bulk_compat(struct dev_state
*ps
,
1453 struct usbdevfs_bulktransfer32 __user
*p32
)
1455 struct usbdevfs_bulktransfer __user
*p
;
1457 compat_caddr_t addr
;
1459 p
= compat_alloc_user_space(sizeof(*p
));
1461 if (get_user(n
, &p32
->ep
) || put_user(n
, &p
->ep
) ||
1462 get_user(n
, &p32
->len
) || put_user(n
, &p
->len
) ||
1463 get_user(n
, &p32
->timeout
) || put_user(n
, &p
->timeout
) ||
1464 get_user(addr
, &p32
->data
) || put_user(compat_ptr(addr
), &p
->data
))
1467 return proc_bulk(ps
, p
);
1469 static int proc_disconnectsignal_compat(struct dev_state
*ps
, void __user
*arg
)
1471 struct usbdevfs_disconnectsignal32 ds
;
1473 if (copy_from_user(&ds
, arg
, sizeof(ds
)))
1475 ps
->discsignr
= ds
.signr
;
1476 ps
->disccontext
= compat_ptr(ds
.context
);
1480 static int get_urb32(struct usbdevfs_urb
*kurb
,
1481 struct usbdevfs_urb32 __user
*uurb
)
1484 if (!access_ok(VERIFY_READ
, uurb
, sizeof(*uurb
)) ||
1485 __get_user(kurb
->type
, &uurb
->type
) ||
1486 __get_user(kurb
->endpoint
, &uurb
->endpoint
) ||
1487 __get_user(kurb
->status
, &uurb
->status
) ||
1488 __get_user(kurb
->flags
, &uurb
->flags
) ||
1489 __get_user(kurb
->buffer_length
, &uurb
->buffer_length
) ||
1490 __get_user(kurb
->actual_length
, &uurb
->actual_length
) ||
1491 __get_user(kurb
->start_frame
, &uurb
->start_frame
) ||
1492 __get_user(kurb
->number_of_packets
, &uurb
->number_of_packets
) ||
1493 __get_user(kurb
->error_count
, &uurb
->error_count
) ||
1494 __get_user(kurb
->signr
, &uurb
->signr
))
1497 if (__get_user(uptr
, &uurb
->buffer
))
1499 kurb
->buffer
= compat_ptr(uptr
);
1500 if (__get_user(uptr
, &uurb
->usercontext
))
1502 kurb
->usercontext
= compat_ptr(uptr
);
1507 static int proc_submiturb_compat(struct dev_state
*ps
, void __user
*arg
)
1509 struct usbdevfs_urb uurb
;
1511 if (get_urb32(&uurb
, (struct usbdevfs_urb32 __user
*)arg
))
1514 return proc_do_submiturb(ps
, &uurb
,
1515 ((struct usbdevfs_urb32 __user
*)arg
)->iso_frame_desc
,
1519 static int processcompl_compat(struct async
*as
, void __user
* __user
*arg
)
1521 struct urb
*urb
= as
->urb
;
1522 struct usbdevfs_urb32 __user
*userurb
= as
->userurb
;
1523 void __user
*addr
= as
->userurb
;
1526 if (as
->userbuffer
&& urb
->actual_length
)
1527 if (copy_to_user(as
->userbuffer
, urb
->transfer_buffer
,
1528 urb
->actual_length
))
1530 if (put_user(as
->status
, &userurb
->status
))
1532 if (put_user(urb
->actual_length
, &userurb
->actual_length
))
1534 if (put_user(urb
->error_count
, &userurb
->error_count
))
1537 if (usb_endpoint_xfer_isoc(&urb
->ep
->desc
)) {
1538 for (i
= 0; i
< urb
->number_of_packets
; i
++) {
1539 if (put_user(urb
->iso_frame_desc
[i
].actual_length
,
1540 &userurb
->iso_frame_desc
[i
].actual_length
))
1542 if (put_user(urb
->iso_frame_desc
[i
].status
,
1543 &userurb
->iso_frame_desc
[i
].status
))
1548 if (put_user(ptr_to_compat(addr
), (u32 __user
*)arg
))
1553 static int proc_reapurb_compat(struct dev_state
*ps
, void __user
*arg
)
1555 struct async
*as
= reap_as(ps
);
1557 int retval
= processcompl_compat(as
, (void __user
* __user
*)arg
);
1561 if (signal_pending(current
))
1566 static int proc_reapurbnonblock_compat(struct dev_state
*ps
, void __user
*arg
)
1572 as
= async_getcompleted(ps
);
1574 retval
= processcompl_compat(as
, (void __user
* __user
*)arg
);
1583 static int proc_disconnectsignal(struct dev_state
*ps
, void __user
*arg
)
1585 struct usbdevfs_disconnectsignal ds
;
1587 if (copy_from_user(&ds
, arg
, sizeof(ds
)))
1589 ps
->discsignr
= ds
.signr
;
1590 ps
->disccontext
= ds
.context
;
1594 static int proc_claiminterface(struct dev_state
*ps
, void __user
*arg
)
1598 if (get_user(ifnum
, (unsigned int __user
*)arg
))
1600 return claimintf(ps
, ifnum
);
1603 static int proc_releaseinterface(struct dev_state
*ps
, void __user
*arg
)
1608 if (get_user(ifnum
, (unsigned int __user
*)arg
))
1610 if ((ret
= releaseintf(ps
, ifnum
)) < 0)
1612 destroy_async_on_interface (ps
, ifnum
);
1616 static int proc_ioctl(struct dev_state
*ps
, struct usbdevfs_ioctl
*ctl
)
1621 struct usb_interface
*intf
= NULL
;
1622 struct usb_driver
*driver
= NULL
;
1625 if ((size
= _IOC_SIZE(ctl
->ioctl_code
)) > 0) {
1626 if ((buf
= kmalloc(size
, GFP_KERNEL
)) == NULL
)
1628 if ((_IOC_DIR(ctl
->ioctl_code
) & _IOC_WRITE
)) {
1629 if (copy_from_user(buf
, ctl
->data
, size
)) {
1634 memset(buf
, 0, size
);
1638 if (!connected(ps
)) {
1643 if (ps
->dev
->state
!= USB_STATE_CONFIGURED
)
1644 retval
= -EHOSTUNREACH
;
1645 else if (!(intf
= usb_ifnum_to_if(ps
->dev
, ctl
->ifno
)))
1647 else switch (ctl
->ioctl_code
) {
1649 /* disconnect kernel driver from interface */
1650 case USBDEVFS_DISCONNECT
:
1651 if (intf
->dev
.driver
) {
1652 driver
= to_usb_driver(intf
->dev
.driver
);
1653 dev_dbg(&intf
->dev
, "disconnect by usbfs\n");
1654 usb_driver_release_interface(driver
, intf
);
1659 /* let kernel drivers try to (re)bind to the interface */
1660 case USBDEVFS_CONNECT
:
1661 if (!intf
->dev
.driver
)
1662 retval
= device_attach(&intf
->dev
);
1667 /* talk directly to the interface's driver */
1669 if (intf
->dev
.driver
)
1670 driver
= to_usb_driver(intf
->dev
.driver
);
1671 if (driver
== NULL
|| driver
->unlocked_ioctl
== NULL
) {
1674 retval
= driver
->unlocked_ioctl(intf
, ctl
->ioctl_code
, buf
);
1675 if (retval
== -ENOIOCTLCMD
)
1680 /* cleanup and return */
1682 && (_IOC_DIR(ctl
->ioctl_code
) & _IOC_READ
) != 0
1684 && copy_to_user(ctl
->data
, buf
, size
) != 0)
1691 static int proc_ioctl_default(struct dev_state
*ps
, void __user
*arg
)
1693 struct usbdevfs_ioctl ctrl
;
1695 if (copy_from_user(&ctrl
, arg
, sizeof(ctrl
)))
1697 return proc_ioctl(ps
, &ctrl
);
1700 #ifdef CONFIG_COMPAT
1701 static int proc_ioctl_compat(struct dev_state
*ps
, compat_uptr_t arg
)
1703 struct usbdevfs_ioctl32 __user
*uioc
;
1704 struct usbdevfs_ioctl ctrl
;
1707 uioc
= compat_ptr((long)arg
);
1708 if (!access_ok(VERIFY_READ
, uioc
, sizeof(*uioc
)) ||
1709 __get_user(ctrl
.ifno
, &uioc
->ifno
) ||
1710 __get_user(ctrl
.ioctl_code
, &uioc
->ioctl_code
) ||
1711 __get_user(udata
, &uioc
->data
))
1713 ctrl
.data
= compat_ptr(udata
);
1715 return proc_ioctl(ps
, &ctrl
);
1719 static int proc_claim_port(struct dev_state
*ps
, void __user
*arg
)
1724 if (get_user(portnum
, (unsigned __user
*) arg
))
1726 rc
= usb_hub_claim_port(ps
->dev
, portnum
, ps
);
1728 snoop(&ps
->dev
->dev
, "port %d claimed by process %d: %s\n",
1729 portnum
, task_pid_nr(current
), current
->comm
);
1733 static int proc_release_port(struct dev_state
*ps
, void __user
*arg
)
1737 if (get_user(portnum
, (unsigned __user
*) arg
))
1739 return usb_hub_release_port(ps
->dev
, portnum
, ps
);
1743 * NOTE: All requests here that have interface numbers as parameters
1744 * are assuming that somehow the configuration has been prevented from
1745 * changing. But there's no mechanism to ensure that...
1747 static long usbdev_do_ioctl(struct file
*file
, unsigned int cmd
,
1750 struct dev_state
*ps
= file
->private_data
;
1751 struct inode
*inode
= file
->f_path
.dentry
->d_inode
;
1752 struct usb_device
*dev
= ps
->dev
;
1755 if (!(file
->f_mode
& FMODE_WRITE
))
1758 usb_lock_device(dev
);
1759 if (!connected(ps
)) {
1760 usb_unlock_device(dev
);
1765 case USBDEVFS_CONTROL
:
1766 snoop(&dev
->dev
, "%s: CONTROL\n", __func__
);
1767 ret
= proc_control(ps
, p
);
1769 inode
->i_mtime
= CURRENT_TIME
;
1773 snoop(&dev
->dev
, "%s: BULK\n", __func__
);
1774 ret
= proc_bulk(ps
, p
);
1776 inode
->i_mtime
= CURRENT_TIME
;
1779 case USBDEVFS_RESETEP
:
1780 snoop(&dev
->dev
, "%s: RESETEP\n", __func__
);
1781 ret
= proc_resetep(ps
, p
);
1783 inode
->i_mtime
= CURRENT_TIME
;
1786 case USBDEVFS_RESET
:
1787 snoop(&dev
->dev
, "%s: RESET\n", __func__
);
1788 ret
= proc_resetdevice(ps
);
1791 case USBDEVFS_CLEAR_HALT
:
1792 snoop(&dev
->dev
, "%s: CLEAR_HALT\n", __func__
);
1793 ret
= proc_clearhalt(ps
, p
);
1795 inode
->i_mtime
= CURRENT_TIME
;
1798 case USBDEVFS_GETDRIVER
:
1799 snoop(&dev
->dev
, "%s: GETDRIVER\n", __func__
);
1800 ret
= proc_getdriver(ps
, p
);
1803 case USBDEVFS_CONNECTINFO
:
1804 snoop(&dev
->dev
, "%s: CONNECTINFO\n", __func__
);
1805 ret
= proc_connectinfo(ps
, p
);
1808 case USBDEVFS_SETINTERFACE
:
1809 snoop(&dev
->dev
, "%s: SETINTERFACE\n", __func__
);
1810 ret
= proc_setintf(ps
, p
);
1813 case USBDEVFS_SETCONFIGURATION
:
1814 snoop(&dev
->dev
, "%s: SETCONFIGURATION\n", __func__
);
1815 ret
= proc_setconfig(ps
, p
);
1818 case USBDEVFS_SUBMITURB
:
1819 snoop(&dev
->dev
, "%s: SUBMITURB\n", __func__
);
1820 ret
= proc_submiturb(ps
, p
);
1822 inode
->i_mtime
= CURRENT_TIME
;
1825 #ifdef CONFIG_COMPAT
1826 case USBDEVFS_CONTROL32
:
1827 snoop(&dev
->dev
, "%s: CONTROL32\n", __func__
);
1828 ret
= proc_control_compat(ps
, p
);
1830 inode
->i_mtime
= CURRENT_TIME
;
1833 case USBDEVFS_BULK32
:
1834 snoop(&dev
->dev
, "%s: BULK32\n", __func__
);
1835 ret
= proc_bulk_compat(ps
, p
);
1837 inode
->i_mtime
= CURRENT_TIME
;
1840 case USBDEVFS_DISCSIGNAL32
:
1841 snoop(&dev
->dev
, "%s: DISCSIGNAL32\n", __func__
);
1842 ret
= proc_disconnectsignal_compat(ps
, p
);
1845 case USBDEVFS_SUBMITURB32
:
1846 snoop(&dev
->dev
, "%s: SUBMITURB32\n", __func__
);
1847 ret
= proc_submiturb_compat(ps
, p
);
1849 inode
->i_mtime
= CURRENT_TIME
;
1852 case USBDEVFS_REAPURB32
:
1853 snoop(&dev
->dev
, "%s: REAPURB32\n", __func__
);
1854 ret
= proc_reapurb_compat(ps
, p
);
1857 case USBDEVFS_REAPURBNDELAY32
:
1858 snoop(&dev
->dev
, "%s: REAPURBNDELAY32\n", __func__
);
1859 ret
= proc_reapurbnonblock_compat(ps
, p
);
1862 case USBDEVFS_IOCTL32
:
1863 snoop(&dev
->dev
, "%s: IOCTL32\n", __func__
);
1864 ret
= proc_ioctl_compat(ps
, ptr_to_compat(p
));
1868 case USBDEVFS_DISCARDURB
:
1869 snoop(&dev
->dev
, "%s: DISCARDURB\n", __func__
);
1870 ret
= proc_unlinkurb(ps
, p
);
1873 case USBDEVFS_REAPURB
:
1874 snoop(&dev
->dev
, "%s: REAPURB\n", __func__
);
1875 ret
= proc_reapurb(ps
, p
);
1878 case USBDEVFS_REAPURBNDELAY
:
1879 snoop(&dev
->dev
, "%s: REAPURBNDELAY\n", __func__
);
1880 ret
= proc_reapurbnonblock(ps
, p
);
1883 case USBDEVFS_DISCSIGNAL
:
1884 snoop(&dev
->dev
, "%s: DISCSIGNAL\n", __func__
);
1885 ret
= proc_disconnectsignal(ps
, p
);
1888 case USBDEVFS_CLAIMINTERFACE
:
1889 snoop(&dev
->dev
, "%s: CLAIMINTERFACE\n", __func__
);
1890 ret
= proc_claiminterface(ps
, p
);
1893 case USBDEVFS_RELEASEINTERFACE
:
1894 snoop(&dev
->dev
, "%s: RELEASEINTERFACE\n", __func__
);
1895 ret
= proc_releaseinterface(ps
, p
);
1898 case USBDEVFS_IOCTL
:
1899 snoop(&dev
->dev
, "%s: IOCTL\n", __func__
);
1900 ret
= proc_ioctl_default(ps
, p
);
1903 case USBDEVFS_CLAIM_PORT
:
1904 snoop(&dev
->dev
, "%s: CLAIM_PORT\n", __func__
);
1905 ret
= proc_claim_port(ps
, p
);
1908 case USBDEVFS_RELEASE_PORT
:
1909 snoop(&dev
->dev
, "%s: RELEASE_PORT\n", __func__
);
1910 ret
= proc_release_port(ps
, p
);
1913 usb_unlock_device(dev
);
1915 inode
->i_atime
= CURRENT_TIME
;
1919 static long usbdev_ioctl(struct file
*file
, unsigned int cmd
,
1924 ret
= usbdev_do_ioctl(file
, cmd
, (void __user
*)arg
);
1929 #ifdef CONFIG_COMPAT
1930 static long usbdev_compat_ioctl(struct file
*file
, unsigned int cmd
,
1935 ret
= usbdev_do_ioctl(file
, cmd
, compat_ptr(arg
));
1941 /* No kernel lock - fine */
1942 static unsigned int usbdev_poll(struct file
*file
,
1943 struct poll_table_struct
*wait
)
1945 struct dev_state
*ps
= file
->private_data
;
1946 unsigned int mask
= 0;
1948 poll_wait(file
, &ps
->wait
, wait
);
1949 if (file
->f_mode
& FMODE_WRITE
&& !list_empty(&ps
->async_completed
))
1950 mask
|= POLLOUT
| POLLWRNORM
;
1952 mask
|= POLLERR
| POLLHUP
;
1956 const struct file_operations usbdev_file_operations
= {
1957 .owner
= THIS_MODULE
,
1958 .llseek
= usbdev_lseek
,
1959 .read
= usbdev_read
,
1960 .poll
= usbdev_poll
,
1961 .unlocked_ioctl
= usbdev_ioctl
,
1962 #ifdef CONFIG_COMPAT
1963 .compat_ioctl
= usbdev_compat_ioctl
,
1965 .open
= usbdev_open
,
1966 .release
= usbdev_release
,
1969 static void usbdev_remove(struct usb_device
*udev
)
1971 struct dev_state
*ps
;
1972 struct siginfo sinfo
;
1974 while (!list_empty(&udev
->filelist
)) {
1975 ps
= list_entry(udev
->filelist
.next
, struct dev_state
, list
);
1976 destroy_all_async(ps
);
1977 wake_up_all(&ps
->wait
);
1978 list_del_init(&ps
->list
);
1979 if (ps
->discsignr
) {
1980 sinfo
.si_signo
= ps
->discsignr
;
1981 sinfo
.si_errno
= EPIPE
;
1982 sinfo
.si_code
= SI_ASYNCIO
;
1983 sinfo
.si_addr
= ps
->disccontext
;
1984 kill_pid_info_as_uid(ps
->discsignr
, &sinfo
,
1985 ps
->disc_pid
, ps
->disc_uid
,
1986 ps
->disc_euid
, ps
->secid
);
1991 #ifdef CONFIG_USB_DEVICE_CLASS
1992 static struct class *usb_classdev_class
;
1994 static int usb_classdev_add(struct usb_device
*dev
)
1996 struct device
*cldev
;
1998 cldev
= device_create(usb_classdev_class
, &dev
->dev
, dev
->dev
.devt
,
1999 NULL
, "usbdev%d.%d", dev
->bus
->busnum
,
2002 return PTR_ERR(cldev
);
2003 dev
->usb_classdev
= cldev
;
2007 static void usb_classdev_remove(struct usb_device
*dev
)
2009 if (dev
->usb_classdev
)
2010 device_unregister(dev
->usb_classdev
);
2014 #define usb_classdev_add(dev) 0
2015 #define usb_classdev_remove(dev) do {} while (0)
2019 static int usbdev_notify(struct notifier_block
*self
,
2020 unsigned long action
, void *dev
)
2023 case USB_DEVICE_ADD
:
2024 if (usb_classdev_add(dev
))
2027 case USB_DEVICE_REMOVE
:
2028 usb_classdev_remove(dev
);
2035 static struct notifier_block usbdev_nb
= {
2036 .notifier_call
= usbdev_notify
,
2039 static struct cdev usb_device_cdev
;
2041 int __init
usb_devio_init(void)
2045 retval
= register_chrdev_region(USB_DEVICE_DEV
, USB_DEVICE_MAX
,
2048 printk(KERN_ERR
"Unable to register minors for usb_device\n");
2051 cdev_init(&usb_device_cdev
, &usbdev_file_operations
);
2052 retval
= cdev_add(&usb_device_cdev
, USB_DEVICE_DEV
, USB_DEVICE_MAX
);
2054 printk(KERN_ERR
"Unable to get usb_device major %d\n",
2058 #ifdef CONFIG_USB_DEVICE_CLASS
2059 usb_classdev_class
= class_create(THIS_MODULE
, "usb_device");
2060 if (IS_ERR(usb_classdev_class
)) {
2061 printk(KERN_ERR
"Unable to register usb_device class\n");
2062 retval
= PTR_ERR(usb_classdev_class
);
2063 cdev_del(&usb_device_cdev
);
2064 usb_classdev_class
= NULL
;
2067 /* devices of this class shadow the major:minor of their parent
2068 * device, so clear ->dev_kobj to prevent adding duplicate entries
2071 usb_classdev_class
->dev_kobj
= NULL
;
2073 usb_register_notify(&usbdev_nb
);
2078 unregister_chrdev_region(USB_DEVICE_DEV
, USB_DEVICE_MAX
);
2082 void usb_devio_cleanup(void)
2084 usb_unregister_notify(&usbdev_nb
);
2085 #ifdef CONFIG_USB_DEVICE_CLASS
2086 class_destroy(usb_classdev_class
);
2088 cdev_del(&usb_device_cdev
);
2089 unregister_chrdev_region(USB_DEVICE_DEV
, USB_DEVICE_MAX
);