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/usb.h>
44 #include <linux/usbdevice_fs.h>
45 #include <linux/usb/hcd.h> /* for usbcore internals */
46 #include <linux/cdev.h>
47 #include <linux/notifier.h>
48 #include <linux/security.h>
49 #include <linux/user_namespace.h>
50 #include <linux/scatterlist.h>
51 #include <asm/uaccess.h>
52 #include <asm/byteorder.h>
53 #include <linux/moduleparam.h>
58 #define USB_DEVICE_MAX USB_MAXBUS * 128
59 #define USB_SG_SIZE 16384 /* split-size for large txs */
61 /* Mutual exclusion for removal, open, and release */
62 DEFINE_MUTEX(usbfs_mutex
);
65 struct list_head list
; /* state list */
66 struct usb_device
*dev
;
68 spinlock_t lock
; /* protects the async urb lists */
69 struct list_head async_pending
;
70 struct list_head async_completed
;
71 wait_queue_head_t wait
; /* wake up if a request completed */
72 unsigned int discsignr
;
74 const struct cred
*cred
;
75 void __user
*disccontext
;
76 unsigned long ifclaimed
;
78 u32 disabled_bulk_eps
;
82 struct list_head asynclist
;
85 const struct cred
*cred
;
88 void __user
*userbuffer
;
91 unsigned int mem_usage
;
98 static bool usbfs_snoop
;
99 module_param(usbfs_snoop
, bool, S_IRUGO
| S_IWUSR
);
100 MODULE_PARM_DESC(usbfs_snoop
, "true to log all usbfs traffic");
102 #define snoop(dev, format, arg...) \
105 dev_info(dev , format , ## arg); \
112 #define USB_DEVICE_DEV MKDEV(USB_DEVICE_MAJOR, 0)
114 /* Limit on the total amount of memory we can allocate for transfers */
115 static unsigned usbfs_memory_mb
= 16;
116 module_param(usbfs_memory_mb
, uint
, 0644);
117 MODULE_PARM_DESC(usbfs_memory_mb
,
118 "maximum MB allowed for usbfs buffers (0 = no limit)");
120 /* Hard limit, necessary to avoid aithmetic overflow */
121 #define USBFS_XFER_MAX (UINT_MAX / 2 - 1000000)
123 static atomic_t usbfs_memory_usage
; /* Total memory currently allocated */
125 /* Check whether it's okay to allocate more memory for a transfer */
126 static int usbfs_increase_memory_usage(unsigned amount
)
131 * Convert usbfs_memory_mb to bytes, avoiding overflows.
132 * 0 means use the hard limit (effectively unlimited).
134 lim
= ACCESS_ONCE(usbfs_memory_mb
);
135 if (lim
== 0 || lim
> (USBFS_XFER_MAX
>> 20))
136 lim
= USBFS_XFER_MAX
;
140 atomic_add(amount
, &usbfs_memory_usage
);
141 if (atomic_read(&usbfs_memory_usage
) <= lim
)
143 atomic_sub(amount
, &usbfs_memory_usage
);
147 /* Memory for a transfer is being deallocated */
148 static void usbfs_decrease_memory_usage(unsigned amount
)
150 atomic_sub(amount
, &usbfs_memory_usage
);
153 static int connected(struct dev_state
*ps
)
155 return (!list_empty(&ps
->list
) &&
156 ps
->dev
->state
!= USB_STATE_NOTATTACHED
);
159 static loff_t
usbdev_lseek(struct file
*file
, loff_t offset
, int orig
)
163 mutex_lock(&file
->f_dentry
->d_inode
->i_mutex
);
167 file
->f_pos
= offset
;
171 file
->f_pos
+= offset
;
179 mutex_unlock(&file
->f_dentry
->d_inode
->i_mutex
);
183 static ssize_t
usbdev_read(struct file
*file
, char __user
*buf
, size_t nbytes
,
186 struct dev_state
*ps
= file
->private_data
;
187 struct usb_device
*dev
= ps
->dev
;
194 usb_lock_device(dev
);
195 if (!connected(ps
)) {
198 } else if (pos
< 0) {
203 if (pos
< sizeof(struct usb_device_descriptor
)) {
204 /* 18 bytes - fits on the stack */
205 struct usb_device_descriptor temp_desc
;
207 memcpy(&temp_desc
, &dev
->descriptor
, sizeof(dev
->descriptor
));
208 le16_to_cpus(&temp_desc
.bcdUSB
);
209 le16_to_cpus(&temp_desc
.idVendor
);
210 le16_to_cpus(&temp_desc
.idProduct
);
211 le16_to_cpus(&temp_desc
.bcdDevice
);
213 len
= sizeof(struct usb_device_descriptor
) - pos
;
216 if (copy_to_user(buf
, ((char *)&temp_desc
) + pos
, len
)) {
227 pos
= sizeof(struct usb_device_descriptor
);
228 for (i
= 0; nbytes
&& i
< dev
->descriptor
.bNumConfigurations
; i
++) {
229 struct usb_config_descriptor
*config
=
230 (struct usb_config_descriptor
*)dev
->rawdescriptors
[i
];
231 unsigned int length
= le16_to_cpu(config
->wTotalLength
);
233 if (*ppos
< pos
+ length
) {
235 /* The descriptor may claim to be longer than it
236 * really is. Here is the actual allocated length. */
238 le16_to_cpu(dev
->config
[i
].desc
.wTotalLength
);
240 len
= length
- (*ppos
- pos
);
244 /* Simply don't write (skip over) unallocated parts */
245 if (alloclen
> (*ppos
- pos
)) {
246 alloclen
-= (*ppos
- pos
);
247 if (copy_to_user(buf
,
248 dev
->rawdescriptors
[i
] + (*ppos
- pos
),
249 min(len
, alloclen
))) {
265 usb_unlock_device(dev
);
270 * async list handling
273 static struct async
*alloc_async(unsigned int numisoframes
)
277 as
= kzalloc(sizeof(struct async
), GFP_KERNEL
);
280 as
->urb
= usb_alloc_urb(numisoframes
, GFP_KERNEL
);
288 static void free_async(struct async
*as
)
295 for (i
= 0; i
< as
->urb
->num_sgs
; i
++) {
296 if (sg_page(&as
->urb
->sg
[i
]))
297 kfree(sg_virt(&as
->urb
->sg
[i
]));
300 kfree(as
->urb
->transfer_buffer
);
301 kfree(as
->urb
->setup_packet
);
302 usb_free_urb(as
->urb
);
303 usbfs_decrease_memory_usage(as
->mem_usage
);
307 static void async_newpending(struct async
*as
)
309 struct dev_state
*ps
= as
->ps
;
312 spin_lock_irqsave(&ps
->lock
, flags
);
313 list_add_tail(&as
->asynclist
, &ps
->async_pending
);
314 spin_unlock_irqrestore(&ps
->lock
, flags
);
317 static void async_removepending(struct async
*as
)
319 struct dev_state
*ps
= as
->ps
;
322 spin_lock_irqsave(&ps
->lock
, flags
);
323 list_del_init(&as
->asynclist
);
324 spin_unlock_irqrestore(&ps
->lock
, flags
);
327 static struct async
*async_getcompleted(struct dev_state
*ps
)
330 struct async
*as
= NULL
;
332 spin_lock_irqsave(&ps
->lock
, flags
);
333 if (!list_empty(&ps
->async_completed
)) {
334 as
= list_entry(ps
->async_completed
.next
, struct async
,
336 list_del_init(&as
->asynclist
);
338 spin_unlock_irqrestore(&ps
->lock
, flags
);
342 static struct async
*async_getpending(struct dev_state
*ps
,
343 void __user
*userurb
)
347 list_for_each_entry(as
, &ps
->async_pending
, asynclist
)
348 if (as
->userurb
== userurb
) {
349 list_del_init(&as
->asynclist
);
356 static void snoop_urb(struct usb_device
*udev
,
357 void __user
*userurb
, int pipe
, unsigned length
,
358 int timeout_or_status
, enum snoop_when when
,
359 unsigned char *data
, unsigned data_len
)
361 static const char *types
[] = {"isoc", "int", "ctrl", "bulk"};
362 static const char *dirs
[] = {"out", "in"};
369 ep
= usb_pipeendpoint(pipe
);
370 t
= types
[usb_pipetype(pipe
)];
371 d
= dirs
[!!usb_pipein(pipe
)];
373 if (userurb
) { /* Async */
375 dev_info(&udev
->dev
, "userurb %p, ep%d %s-%s, "
377 userurb
, ep
, t
, d
, length
);
379 dev_info(&udev
->dev
, "userurb %p, ep%d %s-%s, "
380 "actual_length %u status %d\n",
381 userurb
, ep
, t
, d
, length
,
385 dev_info(&udev
->dev
, "ep%d %s-%s, length %u, "
387 ep
, t
, d
, length
, timeout_or_status
);
389 dev_info(&udev
->dev
, "ep%d %s-%s, actual_length %u, "
391 ep
, t
, d
, length
, timeout_or_status
);
394 if (data
&& data_len
> 0) {
395 print_hex_dump(KERN_DEBUG
, "data: ", DUMP_PREFIX_NONE
, 32, 1,
400 static void snoop_urb_data(struct urb
*urb
, unsigned len
)
407 if (urb
->num_sgs
== 0) {
408 print_hex_dump(KERN_DEBUG
, "data: ", DUMP_PREFIX_NONE
, 32, 1,
409 urb
->transfer_buffer
, len
, 1);
413 for (i
= 0; i
< urb
->num_sgs
&& len
; i
++) {
414 size
= (len
> USB_SG_SIZE
) ? USB_SG_SIZE
: len
;
415 print_hex_dump(KERN_DEBUG
, "data: ", DUMP_PREFIX_NONE
, 32, 1,
416 sg_virt(&urb
->sg
[i
]), size
, 1);
421 static int copy_urb_data_to_user(u8 __user
*userbuffer
, struct urb
*urb
)
423 unsigned i
, len
, size
;
425 if (urb
->number_of_packets
> 0) /* Isochronous */
426 len
= urb
->transfer_buffer_length
;
428 len
= urb
->actual_length
;
430 if (urb
->num_sgs
== 0) {
431 if (copy_to_user(userbuffer
, urb
->transfer_buffer
, len
))
436 for (i
= 0; i
< urb
->num_sgs
&& len
; i
++) {
437 size
= (len
> USB_SG_SIZE
) ? USB_SG_SIZE
: len
;
438 if (copy_to_user(userbuffer
, sg_virt(&urb
->sg
[i
]), size
))
447 #define AS_CONTINUATION 1
450 static void cancel_bulk_urbs(struct dev_state
*ps
, unsigned bulk_addr
)
457 /* Mark all the pending URBs that match bulk_addr, up to but not
458 * including the first one without AS_CONTINUATION. If such an
459 * URB is encountered then a new transfer has already started so
460 * the endpoint doesn't need to be disabled; otherwise it does.
462 list_for_each_entry(as
, &ps
->async_pending
, asynclist
) {
463 if (as
->bulk_addr
== bulk_addr
) {
464 if (as
->bulk_status
!= AS_CONTINUATION
)
466 as
->bulk_status
= AS_UNLINK
;
470 ps
->disabled_bulk_eps
|= (1 << bulk_addr
);
472 /* Now carefully unlink all the marked pending URBs */
474 list_for_each_entry(as
, &ps
->async_pending
, asynclist
) {
475 if (as
->bulk_status
== AS_UNLINK
) {
476 as
->bulk_status
= 0; /* Only once */
479 spin_unlock(&ps
->lock
); /* Allow completions */
482 spin_lock(&ps
->lock
);
488 static void async_completed(struct urb
*urb
)
490 struct async
*as
= urb
->context
;
491 struct dev_state
*ps
= as
->ps
;
492 struct siginfo sinfo
;
493 struct pid
*pid
= NULL
;
495 const struct cred
*cred
= NULL
;
498 spin_lock(&ps
->lock
);
499 list_move_tail(&as
->asynclist
, &ps
->async_completed
);
500 as
->status
= urb
->status
;
503 sinfo
.si_signo
= as
->signr
;
504 sinfo
.si_errno
= as
->status
;
505 sinfo
.si_code
= SI_ASYNCIO
;
506 sinfo
.si_addr
= as
->userurb
;
507 pid
= get_pid(as
->pid
);
508 cred
= get_cred(as
->cred
);
511 snoop(&urb
->dev
->dev
, "urb complete\n");
512 snoop_urb(urb
->dev
, as
->userurb
, urb
->pipe
, urb
->actual_length
,
513 as
->status
, COMPLETE
, NULL
, 0);
514 if ((urb
->transfer_flags
& URB_DIR_MASK
) == USB_DIR_IN
)
515 snoop_urb_data(urb
, urb
->actual_length
);
517 if (as
->status
< 0 && as
->bulk_addr
&& as
->status
!= -ECONNRESET
&&
518 as
->status
!= -ENOENT
)
519 cancel_bulk_urbs(ps
, as
->bulk_addr
);
520 spin_unlock(&ps
->lock
);
523 kill_pid_info_as_cred(sinfo
.si_signo
, &sinfo
, pid
, cred
, secid
);
531 static void destroy_async(struct dev_state
*ps
, struct list_head
*list
)
537 spin_lock_irqsave(&ps
->lock
, flags
);
538 while (!list_empty(list
)) {
539 as
= list_entry(list
->next
, struct async
, asynclist
);
540 list_del_init(&as
->asynclist
);
544 /* drop the spinlock so the completion handler can run */
545 spin_unlock_irqrestore(&ps
->lock
, flags
);
548 spin_lock_irqsave(&ps
->lock
, flags
);
550 spin_unlock_irqrestore(&ps
->lock
, flags
);
553 static void destroy_async_on_interface(struct dev_state
*ps
,
556 struct list_head
*p
, *q
, hitlist
;
559 INIT_LIST_HEAD(&hitlist
);
560 spin_lock_irqsave(&ps
->lock
, flags
);
561 list_for_each_safe(p
, q
, &ps
->async_pending
)
562 if (ifnum
== list_entry(p
, struct async
, asynclist
)->ifnum
)
563 list_move_tail(p
, &hitlist
);
564 spin_unlock_irqrestore(&ps
->lock
, flags
);
565 destroy_async(ps
, &hitlist
);
568 static void destroy_all_async(struct dev_state
*ps
)
570 destroy_async(ps
, &ps
->async_pending
);
574 * interface claims are made only at the request of user level code,
575 * which can also release them (explicitly or by closing files).
576 * they're also undone when devices disconnect.
579 static int driver_probe(struct usb_interface
*intf
,
580 const struct usb_device_id
*id
)
585 static void driver_disconnect(struct usb_interface
*intf
)
587 struct dev_state
*ps
= usb_get_intfdata(intf
);
588 unsigned int ifnum
= intf
->altsetting
->desc
.bInterfaceNumber
;
593 /* NOTE: this relies on usbcore having canceled and completed
594 * all pending I/O requests; 2.6 does that.
597 if (likely(ifnum
< 8*sizeof(ps
->ifclaimed
)))
598 clear_bit(ifnum
, &ps
->ifclaimed
);
600 dev_warn(&intf
->dev
, "interface number %u out of range\n",
603 usb_set_intfdata(intf
, NULL
);
605 /* force async requests to complete */
606 destroy_async_on_interface(ps
, ifnum
);
609 /* The following routines are merely placeholders. There is no way
610 * to inform a user task about suspend or resumes.
612 static int driver_suspend(struct usb_interface
*intf
, pm_message_t msg
)
617 static int driver_resume(struct usb_interface
*intf
)
622 struct usb_driver usbfs_driver
= {
624 .probe
= driver_probe
,
625 .disconnect
= driver_disconnect
,
626 .suspend
= driver_suspend
,
627 .resume
= driver_resume
,
630 static int claimintf(struct dev_state
*ps
, unsigned int ifnum
)
632 struct usb_device
*dev
= ps
->dev
;
633 struct usb_interface
*intf
;
636 if (ifnum
>= 8*sizeof(ps
->ifclaimed
))
638 /* already claimed */
639 if (test_bit(ifnum
, &ps
->ifclaimed
))
642 intf
= usb_ifnum_to_if(dev
, ifnum
);
646 err
= usb_driver_claim_interface(&usbfs_driver
, intf
, ps
);
648 set_bit(ifnum
, &ps
->ifclaimed
);
652 static int releaseintf(struct dev_state
*ps
, unsigned int ifnum
)
654 struct usb_device
*dev
;
655 struct usb_interface
*intf
;
659 if (ifnum
>= 8*sizeof(ps
->ifclaimed
))
662 intf
= usb_ifnum_to_if(dev
, ifnum
);
665 else if (test_and_clear_bit(ifnum
, &ps
->ifclaimed
)) {
666 usb_driver_release_interface(&usbfs_driver
, intf
);
672 static int checkintf(struct dev_state
*ps
, unsigned int ifnum
)
674 if (ps
->dev
->state
!= USB_STATE_CONFIGURED
)
675 return -EHOSTUNREACH
;
676 if (ifnum
>= 8*sizeof(ps
->ifclaimed
))
678 if (test_bit(ifnum
, &ps
->ifclaimed
))
680 /* if not yet claimed, claim it for the driver */
681 dev_warn(&ps
->dev
->dev
, "usbfs: process %d (%s) did not claim "
682 "interface %u before use\n", task_pid_nr(current
),
683 current
->comm
, ifnum
);
684 return claimintf(ps
, ifnum
);
687 static int findintfep(struct usb_device
*dev
, unsigned int ep
)
689 unsigned int i
, j
, e
;
690 struct usb_interface
*intf
;
691 struct usb_host_interface
*alts
;
692 struct usb_endpoint_descriptor
*endpt
;
694 if (ep
& ~(USB_DIR_IN
|0xf))
698 for (i
= 0; i
< dev
->actconfig
->desc
.bNumInterfaces
; i
++) {
699 intf
= dev
->actconfig
->interface
[i
];
700 for (j
= 0; j
< intf
->num_altsetting
; j
++) {
701 alts
= &intf
->altsetting
[j
];
702 for (e
= 0; e
< alts
->desc
.bNumEndpoints
; e
++) {
703 endpt
= &alts
->endpoint
[e
].desc
;
704 if (endpt
->bEndpointAddress
== ep
)
705 return alts
->desc
.bInterfaceNumber
;
712 static int check_ctrlrecip(struct dev_state
*ps
, unsigned int requesttype
,
713 unsigned int request
, unsigned int index
)
716 struct usb_host_interface
*alt_setting
;
718 if (ps
->dev
->state
!= USB_STATE_UNAUTHENTICATED
719 && ps
->dev
->state
!= USB_STATE_ADDRESS
720 && ps
->dev
->state
!= USB_STATE_CONFIGURED
)
721 return -EHOSTUNREACH
;
722 if (USB_TYPE_VENDOR
== (USB_TYPE_MASK
& requesttype
))
726 * check for the special corner case 'get_device_id' in the printer
727 * class specification, where wIndex is (interface << 8 | altsetting)
728 * instead of just interface
730 if (requesttype
== 0xa1 && request
== 0) {
731 alt_setting
= usb_find_alt_setting(ps
->dev
->actconfig
,
732 index
>> 8, index
& 0xff);
734 && alt_setting
->desc
.bInterfaceClass
== USB_CLASS_PRINTER
)
739 switch (requesttype
& USB_RECIP_MASK
) {
740 case USB_RECIP_ENDPOINT
:
741 ret
= findintfep(ps
->dev
, index
);
743 ret
= checkintf(ps
, ret
);
746 case USB_RECIP_INTERFACE
:
747 ret
= checkintf(ps
, index
);
753 static int match_devt(struct device
*dev
, void *data
)
755 return dev
->devt
== (dev_t
) (unsigned long) data
;
758 static struct usb_device
*usbdev_lookup_by_devt(dev_t devt
)
762 dev
= bus_find_device(&usb_bus_type
, NULL
,
763 (void *) (unsigned long) devt
, match_devt
);
766 return container_of(dev
, struct usb_device
, dev
);
772 static int usbdev_open(struct inode
*inode
, struct file
*file
)
774 struct usb_device
*dev
= NULL
;
775 struct dev_state
*ps
;
779 ps
= kmalloc(sizeof(struct dev_state
), GFP_KERNEL
);
785 /* Protect against simultaneous removal or release */
786 mutex_lock(&usbfs_mutex
);
788 /* usbdev device-node */
789 if (imajor(inode
) == USB_DEVICE_MAJOR
)
790 dev
= usbdev_lookup_by_devt(inode
->i_rdev
);
792 mutex_unlock(&usbfs_mutex
);
797 usb_lock_device(dev
);
798 if (dev
->state
== USB_STATE_NOTATTACHED
)
799 goto out_unlock_device
;
801 ret
= usb_autoresume_device(dev
);
803 goto out_unlock_device
;
807 spin_lock_init(&ps
->lock
);
808 INIT_LIST_HEAD(&ps
->list
);
809 INIT_LIST_HEAD(&ps
->async_pending
);
810 INIT_LIST_HEAD(&ps
->async_completed
);
811 init_waitqueue_head(&ps
->wait
);
813 ps
->disc_pid
= get_pid(task_pid(current
));
814 ps
->cred
= get_current_cred();
815 ps
->disccontext
= NULL
;
817 security_task_getsecid(current
, &ps
->secid
);
819 list_add_tail(&ps
->list
, &dev
->filelist
);
820 file
->private_data
= ps
;
821 usb_unlock_device(dev
);
822 snoop(&dev
->dev
, "opened by process %d: %s\n", task_pid_nr(current
),
827 usb_unlock_device(dev
);
834 static int usbdev_release(struct inode
*inode
, struct file
*file
)
836 struct dev_state
*ps
= file
->private_data
;
837 struct usb_device
*dev
= ps
->dev
;
841 usb_lock_device(dev
);
842 usb_hub_release_all_ports(dev
, ps
);
844 list_del_init(&ps
->list
);
846 for (ifnum
= 0; ps
->ifclaimed
&& ifnum
< 8*sizeof(ps
->ifclaimed
);
848 if (test_bit(ifnum
, &ps
->ifclaimed
))
849 releaseintf(ps
, ifnum
);
851 destroy_all_async(ps
);
852 usb_autosuspend_device(dev
);
853 usb_unlock_device(dev
);
855 put_pid(ps
->disc_pid
);
858 as
= async_getcompleted(ps
);
861 as
= async_getcompleted(ps
);
867 static int proc_control(struct dev_state
*ps
, void __user
*arg
)
869 struct usb_device
*dev
= ps
->dev
;
870 struct usbdevfs_ctrltransfer ctrl
;
876 if (copy_from_user(&ctrl
, arg
, sizeof(ctrl
)))
878 ret
= check_ctrlrecip(ps
, ctrl
.bRequestType
, ctrl
.bRequest
,
882 wLength
= ctrl
.wLength
; /* To suppress 64k PAGE_SIZE warning */
883 if (wLength
> PAGE_SIZE
)
885 ret
= usbfs_increase_memory_usage(PAGE_SIZE
+ sizeof(struct urb
) +
886 sizeof(struct usb_ctrlrequest
));
889 tbuf
= (unsigned char *)__get_free_page(GFP_KERNEL
);
895 snoop(&dev
->dev
, "control urb: bRequestType=%02x "
896 "bRequest=%02x wValue=%04x "
897 "wIndex=%04x wLength=%04x\n",
898 ctrl
.bRequestType
, ctrl
.bRequest
,
899 __le16_to_cpup(&ctrl
.wValue
),
900 __le16_to_cpup(&ctrl
.wIndex
),
901 __le16_to_cpup(&ctrl
.wLength
));
902 if (ctrl
.bRequestType
& 0x80) {
903 if (ctrl
.wLength
&& !access_ok(VERIFY_WRITE
, ctrl
.data
,
908 pipe
= usb_rcvctrlpipe(dev
, 0);
909 snoop_urb(dev
, NULL
, pipe
, ctrl
.wLength
, tmo
, SUBMIT
, NULL
, 0);
911 usb_unlock_device(dev
);
912 i
= usb_control_msg(dev
, pipe
, ctrl
.bRequest
,
913 ctrl
.bRequestType
, ctrl
.wValue
, ctrl
.wIndex
,
914 tbuf
, ctrl
.wLength
, tmo
);
915 usb_lock_device(dev
);
916 snoop_urb(dev
, NULL
, pipe
, max(i
, 0), min(i
, 0), COMPLETE
,
918 if ((i
> 0) && ctrl
.wLength
) {
919 if (copy_to_user(ctrl
.data
, tbuf
, i
)) {
926 if (copy_from_user(tbuf
, ctrl
.data
, ctrl
.wLength
)) {
931 pipe
= usb_sndctrlpipe(dev
, 0);
932 snoop_urb(dev
, NULL
, pipe
, ctrl
.wLength
, tmo
, SUBMIT
,
935 usb_unlock_device(dev
);
936 i
= usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0), ctrl
.bRequest
,
937 ctrl
.bRequestType
, ctrl
.wValue
, ctrl
.wIndex
,
938 tbuf
, ctrl
.wLength
, tmo
);
939 usb_lock_device(dev
);
940 snoop_urb(dev
, NULL
, pipe
, max(i
, 0), min(i
, 0), COMPLETE
, NULL
, 0);
942 if (i
< 0 && i
!= -EPIPE
) {
943 dev_printk(KERN_DEBUG
, &dev
->dev
, "usbfs: USBDEVFS_CONTROL "
944 "failed cmd %s rqt %u rq %u len %u ret %d\n",
945 current
->comm
, ctrl
.bRequestType
, ctrl
.bRequest
,
950 free_page((unsigned long) tbuf
);
951 usbfs_decrease_memory_usage(PAGE_SIZE
+ sizeof(struct urb
) +
952 sizeof(struct usb_ctrlrequest
));
956 static int proc_bulk(struct dev_state
*ps
, void __user
*arg
)
958 struct usb_device
*dev
= ps
->dev
;
959 struct usbdevfs_bulktransfer bulk
;
960 unsigned int tmo
, len1
, pipe
;
965 if (copy_from_user(&bulk
, arg
, sizeof(bulk
)))
967 ret
= findintfep(ps
->dev
, bulk
.ep
);
970 ret
= checkintf(ps
, ret
);
973 if (bulk
.ep
& USB_DIR_IN
)
974 pipe
= usb_rcvbulkpipe(dev
, bulk
.ep
& 0x7f);
976 pipe
= usb_sndbulkpipe(dev
, bulk
.ep
& 0x7f);
977 if (!usb_maxpacket(dev
, pipe
, !(bulk
.ep
& USB_DIR_IN
)))
980 if (len1
>= USBFS_XFER_MAX
)
982 ret
= usbfs_increase_memory_usage(len1
+ sizeof(struct urb
));
985 if (!(tbuf
= kmalloc(len1
, GFP_KERNEL
))) {
990 if (bulk
.ep
& 0x80) {
991 if (len1
&& !access_ok(VERIFY_WRITE
, bulk
.data
, len1
)) {
995 snoop_urb(dev
, NULL
, pipe
, len1
, tmo
, SUBMIT
, NULL
, 0);
997 usb_unlock_device(dev
);
998 i
= usb_bulk_msg(dev
, pipe
, tbuf
, len1
, &len2
, tmo
);
999 usb_lock_device(dev
);
1000 snoop_urb(dev
, NULL
, pipe
, len2
, i
, COMPLETE
, tbuf
, len2
);
1003 if (copy_to_user(bulk
.data
, tbuf
, len2
)) {
1010 if (copy_from_user(tbuf
, bulk
.data
, len1
)) {
1015 snoop_urb(dev
, NULL
, pipe
, len1
, tmo
, SUBMIT
, tbuf
, len1
);
1017 usb_unlock_device(dev
);
1018 i
= usb_bulk_msg(dev
, pipe
, tbuf
, len1
, &len2
, tmo
);
1019 usb_lock_device(dev
);
1020 snoop_urb(dev
, NULL
, pipe
, len2
, i
, COMPLETE
, NULL
, 0);
1022 ret
= (i
< 0 ? i
: len2
);
1025 usbfs_decrease_memory_usage(len1
+ sizeof(struct urb
));
1029 static int proc_resetep(struct dev_state
*ps
, void __user
*arg
)
1034 if (get_user(ep
, (unsigned int __user
*)arg
))
1036 ret
= findintfep(ps
->dev
, ep
);
1039 ret
= checkintf(ps
, ret
);
1042 usb_reset_endpoint(ps
->dev
, ep
);
1046 static int proc_clearhalt(struct dev_state
*ps
, void __user
*arg
)
1052 if (get_user(ep
, (unsigned int __user
*)arg
))
1054 ret
= findintfep(ps
->dev
, ep
);
1057 ret
= checkintf(ps
, ret
);
1060 if (ep
& USB_DIR_IN
)
1061 pipe
= usb_rcvbulkpipe(ps
->dev
, ep
& 0x7f);
1063 pipe
= usb_sndbulkpipe(ps
->dev
, ep
& 0x7f);
1065 return usb_clear_halt(ps
->dev
, pipe
);
1068 static int proc_getdriver(struct dev_state
*ps
, void __user
*arg
)
1070 struct usbdevfs_getdriver gd
;
1071 struct usb_interface
*intf
;
1074 if (copy_from_user(&gd
, arg
, sizeof(gd
)))
1076 intf
= usb_ifnum_to_if(ps
->dev
, gd
.interface
);
1077 if (!intf
|| !intf
->dev
.driver
)
1080 strncpy(gd
.driver
, intf
->dev
.driver
->name
,
1082 ret
= (copy_to_user(arg
, &gd
, sizeof(gd
)) ? -EFAULT
: 0);
1087 static int proc_connectinfo(struct dev_state
*ps
, void __user
*arg
)
1089 struct usbdevfs_connectinfo ci
= {
1090 .devnum
= ps
->dev
->devnum
,
1091 .slow
= ps
->dev
->speed
== USB_SPEED_LOW
1094 if (copy_to_user(arg
, &ci
, sizeof(ci
)))
1099 static int proc_resetdevice(struct dev_state
*ps
)
1101 return usb_reset_device(ps
->dev
);
1104 static int proc_setintf(struct dev_state
*ps
, void __user
*arg
)
1106 struct usbdevfs_setinterface setintf
;
1109 if (copy_from_user(&setintf
, arg
, sizeof(setintf
)))
1111 if ((ret
= checkintf(ps
, setintf
.interface
)))
1113 return usb_set_interface(ps
->dev
, setintf
.interface
,
1114 setintf
.altsetting
);
1117 static int proc_setconfig(struct dev_state
*ps
, void __user
*arg
)
1121 struct usb_host_config
*actconfig
;
1123 if (get_user(u
, (int __user
*)arg
))
1126 actconfig
= ps
->dev
->actconfig
;
1128 /* Don't touch the device if any interfaces are claimed.
1129 * It could interfere with other drivers' operations, and if
1130 * an interface is claimed by usbfs it could easily deadlock.
1135 for (i
= 0; i
< actconfig
->desc
.bNumInterfaces
; ++i
) {
1136 if (usb_interface_claimed(actconfig
->interface
[i
])) {
1137 dev_warn(&ps
->dev
->dev
,
1138 "usbfs: interface %d claimed by %s "
1139 "while '%s' sets config #%d\n",
1140 actconfig
->interface
[i
]
1142 ->desc
.bInterfaceNumber
,
1143 actconfig
->interface
[i
]
1152 /* SET_CONFIGURATION is often abused as a "cheap" driver reset,
1153 * so avoid usb_set_configuration()'s kick to sysfs
1156 if (actconfig
&& actconfig
->desc
.bConfigurationValue
== u
)
1157 status
= usb_reset_configuration(ps
->dev
);
1159 status
= usb_set_configuration(ps
->dev
, u
);
1165 static int proc_do_submiturb(struct dev_state
*ps
, struct usbdevfs_urb
*uurb
,
1166 struct usbdevfs_iso_packet_desc __user
*iso_frame_desc
,
1169 struct usbdevfs_iso_packet_desc
*isopkt
= NULL
;
1170 struct usb_host_endpoint
*ep
;
1171 struct async
*as
= NULL
;
1172 struct usb_ctrlrequest
*dr
= NULL
;
1173 unsigned int u
, totlen
, isofrmlen
;
1174 int i
, ret
, is_in
, num_sgs
= 0, ifnum
= -1;
1177 if (uurb
->flags
& ~(USBDEVFS_URB_ISO_ASAP
|
1178 USBDEVFS_URB_SHORT_NOT_OK
|
1179 USBDEVFS_URB_BULK_CONTINUATION
|
1180 USBDEVFS_URB_NO_FSBR
|
1181 USBDEVFS_URB_ZERO_PACKET
|
1182 USBDEVFS_URB_NO_INTERRUPT
))
1184 if (uurb
->buffer_length
> 0 && !uurb
->buffer
)
1186 if (!(uurb
->type
== USBDEVFS_URB_TYPE_CONTROL
&&
1187 (uurb
->endpoint
& ~USB_ENDPOINT_DIR_MASK
) == 0)) {
1188 ifnum
= findintfep(ps
->dev
, uurb
->endpoint
);
1191 ret
= checkintf(ps
, ifnum
);
1195 if ((uurb
->endpoint
& USB_ENDPOINT_DIR_MASK
) != 0) {
1197 ep
= ps
->dev
->ep_in
[uurb
->endpoint
& USB_ENDPOINT_NUMBER_MASK
];
1200 ep
= ps
->dev
->ep_out
[uurb
->endpoint
& USB_ENDPOINT_NUMBER_MASK
];
1206 switch(uurb
->type
) {
1207 case USBDEVFS_URB_TYPE_CONTROL
:
1208 if (!usb_endpoint_xfer_control(&ep
->desc
))
1210 /* min 8 byte setup packet */
1211 if (uurb
->buffer_length
< 8)
1213 dr
= kmalloc(sizeof(struct usb_ctrlrequest
), GFP_KERNEL
);
1216 if (copy_from_user(dr
, uurb
->buffer
, 8)) {
1220 if (uurb
->buffer_length
< (le16_to_cpup(&dr
->wLength
) + 8)) {
1224 ret
= check_ctrlrecip(ps
, dr
->bRequestType
, dr
->bRequest
,
1225 le16_to_cpup(&dr
->wIndex
));
1228 uurb
->number_of_packets
= 0;
1229 uurb
->buffer_length
= le16_to_cpup(&dr
->wLength
);
1231 if ((dr
->bRequestType
& USB_DIR_IN
) && uurb
->buffer_length
) {
1233 uurb
->endpoint
|= USB_DIR_IN
;
1236 uurb
->endpoint
&= ~USB_DIR_IN
;
1238 snoop(&ps
->dev
->dev
, "control urb: bRequestType=%02x "
1239 "bRequest=%02x wValue=%04x "
1240 "wIndex=%04x wLength=%04x\n",
1241 dr
->bRequestType
, dr
->bRequest
,
1242 __le16_to_cpup(&dr
->wValue
),
1243 __le16_to_cpup(&dr
->wIndex
),
1244 __le16_to_cpup(&dr
->wLength
));
1245 u
= sizeof(struct usb_ctrlrequest
);
1248 case USBDEVFS_URB_TYPE_BULK
:
1249 switch (usb_endpoint_type(&ep
->desc
)) {
1250 case USB_ENDPOINT_XFER_CONTROL
:
1251 case USB_ENDPOINT_XFER_ISOC
:
1253 case USB_ENDPOINT_XFER_INT
:
1254 /* allow single-shot interrupt transfers */
1255 uurb
->type
= USBDEVFS_URB_TYPE_INTERRUPT
;
1258 uurb
->number_of_packets
= 0;
1259 num_sgs
= DIV_ROUND_UP(uurb
->buffer_length
, USB_SG_SIZE
);
1260 if (num_sgs
== 1 || num_sgs
> ps
->dev
->bus
->sg_tablesize
)
1264 case USBDEVFS_URB_TYPE_INTERRUPT
:
1265 if (!usb_endpoint_xfer_int(&ep
->desc
))
1268 uurb
->number_of_packets
= 0;
1271 case USBDEVFS_URB_TYPE_ISO
:
1272 /* arbitrary limit */
1273 if (uurb
->number_of_packets
< 1 ||
1274 uurb
->number_of_packets
> 128)
1276 if (!usb_endpoint_xfer_isoc(&ep
->desc
))
1278 isofrmlen
= sizeof(struct usbdevfs_iso_packet_desc
) *
1279 uurb
->number_of_packets
;
1280 if (!(isopkt
= kmalloc(isofrmlen
, GFP_KERNEL
)))
1282 if (copy_from_user(isopkt
, iso_frame_desc
, isofrmlen
)) {
1286 for (totlen
= u
= 0; u
< uurb
->number_of_packets
; u
++) {
1288 * sufficient for USB 2.0 high-bandwidth iso */
1289 if (isopkt
[u
].length
> 8192) {
1293 totlen
+= isopkt
[u
].length
;
1295 u
*= sizeof(struct usb_iso_packet_descriptor
);
1296 uurb
->buffer_length
= totlen
;
1303 if (uurb
->buffer_length
>= USBFS_XFER_MAX
) {
1307 if (uurb
->buffer_length
> 0 &&
1308 !access_ok(is_in
? VERIFY_WRITE
: VERIFY_READ
,
1309 uurb
->buffer
, uurb
->buffer_length
)) {
1313 as
= alloc_async(uurb
->number_of_packets
);
1319 u
+= sizeof(struct async
) + sizeof(struct urb
) + uurb
->buffer_length
+
1320 num_sgs
* sizeof(struct scatterlist
);
1321 ret
= usbfs_increase_memory_usage(u
);
1327 as
->urb
->sg
= kmalloc(num_sgs
* sizeof(struct scatterlist
),
1333 as
->urb
->num_sgs
= num_sgs
;
1334 sg_init_table(as
->urb
->sg
, as
->urb
->num_sgs
);
1336 totlen
= uurb
->buffer_length
;
1337 for (i
= 0; i
< as
->urb
->num_sgs
; i
++) {
1338 u
= (totlen
> USB_SG_SIZE
) ? USB_SG_SIZE
: totlen
;
1339 buf
= kmalloc(u
, GFP_KERNEL
);
1344 sg_set_buf(&as
->urb
->sg
[i
], buf
, u
);
1347 if (copy_from_user(buf
, uurb
->buffer
, u
)) {
1354 } else if (uurb
->buffer_length
> 0) {
1355 as
->urb
->transfer_buffer
= kmalloc(uurb
->buffer_length
,
1357 if (!as
->urb
->transfer_buffer
) {
1363 if (copy_from_user(as
->urb
->transfer_buffer
,
1365 uurb
->buffer_length
)) {
1369 } else if (uurb
->type
== USBDEVFS_URB_TYPE_ISO
) {
1371 * Isochronous input data may end up being
1372 * discontiguous if some of the packets are short.
1373 * Clear the buffer so that the gaps don't leak
1374 * kernel data to userspace.
1376 memset(as
->urb
->transfer_buffer
, 0,
1377 uurb
->buffer_length
);
1380 as
->urb
->dev
= ps
->dev
;
1381 as
->urb
->pipe
= (uurb
->type
<< 30) |
1382 __create_pipe(ps
->dev
, uurb
->endpoint
& 0xf) |
1383 (uurb
->endpoint
& USB_DIR_IN
);
1385 /* This tedious sequence is necessary because the URB_* flags
1386 * are internal to the kernel and subject to change, whereas
1387 * the USBDEVFS_URB_* flags are a user API and must not be changed.
1389 u
= (is_in
? URB_DIR_IN
: URB_DIR_OUT
);
1390 if (uurb
->flags
& USBDEVFS_URB_ISO_ASAP
)
1392 if (uurb
->flags
& USBDEVFS_URB_SHORT_NOT_OK
)
1393 u
|= URB_SHORT_NOT_OK
;
1394 if (uurb
->flags
& USBDEVFS_URB_NO_FSBR
)
1396 if (uurb
->flags
& USBDEVFS_URB_ZERO_PACKET
)
1397 u
|= URB_ZERO_PACKET
;
1398 if (uurb
->flags
& USBDEVFS_URB_NO_INTERRUPT
)
1399 u
|= URB_NO_INTERRUPT
;
1400 as
->urb
->transfer_flags
= u
;
1402 as
->urb
->transfer_buffer_length
= uurb
->buffer_length
;
1403 as
->urb
->setup_packet
= (unsigned char *)dr
;
1405 as
->urb
->start_frame
= uurb
->start_frame
;
1406 as
->urb
->number_of_packets
= uurb
->number_of_packets
;
1407 if (uurb
->type
== USBDEVFS_URB_TYPE_ISO
||
1408 ps
->dev
->speed
== USB_SPEED_HIGH
)
1409 as
->urb
->interval
= 1 << min(15, ep
->desc
.bInterval
- 1);
1411 as
->urb
->interval
= ep
->desc
.bInterval
;
1412 as
->urb
->context
= as
;
1413 as
->urb
->complete
= async_completed
;
1414 for (totlen
= u
= 0; u
< uurb
->number_of_packets
; u
++) {
1415 as
->urb
->iso_frame_desc
[u
].offset
= totlen
;
1416 as
->urb
->iso_frame_desc
[u
].length
= isopkt
[u
].length
;
1417 totlen
+= isopkt
[u
].length
;
1423 if (is_in
&& uurb
->buffer_length
> 0)
1424 as
->userbuffer
= uurb
->buffer
;
1426 as
->userbuffer
= NULL
;
1427 as
->signr
= uurb
->signr
;
1429 as
->pid
= get_pid(task_pid(current
));
1430 as
->cred
= get_current_cred();
1431 security_task_getsecid(current
, &as
->secid
);
1432 snoop_urb(ps
->dev
, as
->userurb
, as
->urb
->pipe
,
1433 as
->urb
->transfer_buffer_length
, 0, SUBMIT
,
1436 snoop_urb_data(as
->urb
, as
->urb
->transfer_buffer_length
);
1438 async_newpending(as
);
1440 if (usb_endpoint_xfer_bulk(&ep
->desc
)) {
1441 spin_lock_irq(&ps
->lock
);
1443 /* Not exactly the endpoint address; the direction bit is
1444 * shifted to the 0x10 position so that the value will be
1447 as
->bulk_addr
= usb_endpoint_num(&ep
->desc
) |
1448 ((ep
->desc
.bEndpointAddress
& USB_ENDPOINT_DIR_MASK
)
1451 /* If this bulk URB is the start of a new transfer, re-enable
1452 * the endpoint. Otherwise mark it as a continuation URB.
1454 if (uurb
->flags
& USBDEVFS_URB_BULK_CONTINUATION
)
1455 as
->bulk_status
= AS_CONTINUATION
;
1457 ps
->disabled_bulk_eps
&= ~(1 << as
->bulk_addr
);
1459 /* Don't accept continuation URBs if the endpoint is
1460 * disabled because of an earlier error.
1462 if (ps
->disabled_bulk_eps
& (1 << as
->bulk_addr
))
1465 ret
= usb_submit_urb(as
->urb
, GFP_ATOMIC
);
1466 spin_unlock_irq(&ps
->lock
);
1468 ret
= usb_submit_urb(as
->urb
, GFP_KERNEL
);
1472 dev_printk(KERN_DEBUG
, &ps
->dev
->dev
,
1473 "usbfs: usb_submit_urb returned %d\n", ret
);
1474 snoop_urb(ps
->dev
, as
->userurb
, as
->urb
->pipe
,
1475 0, ret
, COMPLETE
, NULL
, 0);
1476 async_removepending(as
);
1489 static int proc_submiturb(struct dev_state
*ps
, void __user
*arg
)
1491 struct usbdevfs_urb uurb
;
1493 if (copy_from_user(&uurb
, arg
, sizeof(uurb
)))
1496 return proc_do_submiturb(ps
, &uurb
,
1497 (((struct usbdevfs_urb __user
*)arg
)->iso_frame_desc
),
1501 static int proc_unlinkurb(struct dev_state
*ps
, void __user
*arg
)
1505 unsigned long flags
;
1507 spin_lock_irqsave(&ps
->lock
, flags
);
1508 as
= async_getpending(ps
, arg
);
1510 spin_unlock_irqrestore(&ps
->lock
, flags
);
1516 spin_unlock_irqrestore(&ps
->lock
, flags
);
1524 static int processcompl(struct async
*as
, void __user
* __user
*arg
)
1526 struct urb
*urb
= as
->urb
;
1527 struct usbdevfs_urb __user
*userurb
= as
->userurb
;
1528 void __user
*addr
= as
->userurb
;
1531 if (as
->userbuffer
&& urb
->actual_length
) {
1532 if (copy_urb_data_to_user(as
->userbuffer
, urb
))
1535 if (put_user(as
->status
, &userurb
->status
))
1537 if (put_user(urb
->actual_length
, &userurb
->actual_length
))
1539 if (put_user(urb
->error_count
, &userurb
->error_count
))
1542 if (usb_endpoint_xfer_isoc(&urb
->ep
->desc
)) {
1543 for (i
= 0; i
< urb
->number_of_packets
; i
++) {
1544 if (put_user(urb
->iso_frame_desc
[i
].actual_length
,
1545 &userurb
->iso_frame_desc
[i
].actual_length
))
1547 if (put_user(urb
->iso_frame_desc
[i
].status
,
1548 &userurb
->iso_frame_desc
[i
].status
))
1553 if (put_user(addr
, (void __user
* __user
*)arg
))
1561 static struct async
*reap_as(struct dev_state
*ps
)
1563 DECLARE_WAITQUEUE(wait
, current
);
1564 struct async
*as
= NULL
;
1565 struct usb_device
*dev
= ps
->dev
;
1567 add_wait_queue(&ps
->wait
, &wait
);
1569 __set_current_state(TASK_INTERRUPTIBLE
);
1570 as
= async_getcompleted(ps
);
1573 if (signal_pending(current
))
1575 usb_unlock_device(dev
);
1577 usb_lock_device(dev
);
1579 remove_wait_queue(&ps
->wait
, &wait
);
1580 set_current_state(TASK_RUNNING
);
1584 static int proc_reapurb(struct dev_state
*ps
, void __user
*arg
)
1586 struct async
*as
= reap_as(ps
);
1588 int retval
= processcompl(as
, (void __user
* __user
*)arg
);
1592 if (signal_pending(current
))
1597 static int proc_reapurbnonblock(struct dev_state
*ps
, void __user
*arg
)
1602 as
= async_getcompleted(ps
);
1605 retval
= processcompl(as
, (void __user
* __user
*)arg
);
1611 #ifdef CONFIG_COMPAT
1612 static int proc_control_compat(struct dev_state
*ps
,
1613 struct usbdevfs_ctrltransfer32 __user
*p32
)
1615 struct usbdevfs_ctrltransfer __user
*p
;
1617 p
= compat_alloc_user_space(sizeof(*p
));
1618 if (copy_in_user(p
, p32
, (sizeof(*p32
) - sizeof(compat_caddr_t
))) ||
1619 get_user(udata
, &p32
->data
) ||
1620 put_user(compat_ptr(udata
), &p
->data
))
1622 return proc_control(ps
, p
);
1625 static int proc_bulk_compat(struct dev_state
*ps
,
1626 struct usbdevfs_bulktransfer32 __user
*p32
)
1628 struct usbdevfs_bulktransfer __user
*p
;
1630 compat_caddr_t addr
;
1632 p
= compat_alloc_user_space(sizeof(*p
));
1634 if (get_user(n
, &p32
->ep
) || put_user(n
, &p
->ep
) ||
1635 get_user(n
, &p32
->len
) || put_user(n
, &p
->len
) ||
1636 get_user(n
, &p32
->timeout
) || put_user(n
, &p
->timeout
) ||
1637 get_user(addr
, &p32
->data
) || put_user(compat_ptr(addr
), &p
->data
))
1640 return proc_bulk(ps
, p
);
1642 static int proc_disconnectsignal_compat(struct dev_state
*ps
, void __user
*arg
)
1644 struct usbdevfs_disconnectsignal32 ds
;
1646 if (copy_from_user(&ds
, arg
, sizeof(ds
)))
1648 ps
->discsignr
= ds
.signr
;
1649 ps
->disccontext
= compat_ptr(ds
.context
);
1653 static int get_urb32(struct usbdevfs_urb
*kurb
,
1654 struct usbdevfs_urb32 __user
*uurb
)
1657 if (!access_ok(VERIFY_READ
, uurb
, sizeof(*uurb
)) ||
1658 __get_user(kurb
->type
, &uurb
->type
) ||
1659 __get_user(kurb
->endpoint
, &uurb
->endpoint
) ||
1660 __get_user(kurb
->status
, &uurb
->status
) ||
1661 __get_user(kurb
->flags
, &uurb
->flags
) ||
1662 __get_user(kurb
->buffer_length
, &uurb
->buffer_length
) ||
1663 __get_user(kurb
->actual_length
, &uurb
->actual_length
) ||
1664 __get_user(kurb
->start_frame
, &uurb
->start_frame
) ||
1665 __get_user(kurb
->number_of_packets
, &uurb
->number_of_packets
) ||
1666 __get_user(kurb
->error_count
, &uurb
->error_count
) ||
1667 __get_user(kurb
->signr
, &uurb
->signr
))
1670 if (__get_user(uptr
, &uurb
->buffer
))
1672 kurb
->buffer
= compat_ptr(uptr
);
1673 if (__get_user(uptr
, &uurb
->usercontext
))
1675 kurb
->usercontext
= compat_ptr(uptr
);
1680 static int proc_submiturb_compat(struct dev_state
*ps
, void __user
*arg
)
1682 struct usbdevfs_urb uurb
;
1684 if (get_urb32(&uurb
, (struct usbdevfs_urb32 __user
*)arg
))
1687 return proc_do_submiturb(ps
, &uurb
,
1688 ((struct usbdevfs_urb32 __user
*)arg
)->iso_frame_desc
,
1692 static int processcompl_compat(struct async
*as
, void __user
* __user
*arg
)
1694 struct urb
*urb
= as
->urb
;
1695 struct usbdevfs_urb32 __user
*userurb
= as
->userurb
;
1696 void __user
*addr
= as
->userurb
;
1699 if (as
->userbuffer
&& urb
->actual_length
) {
1700 if (copy_urb_data_to_user(as
->userbuffer
, urb
))
1703 if (put_user(as
->status
, &userurb
->status
))
1705 if (put_user(urb
->actual_length
, &userurb
->actual_length
))
1707 if (put_user(urb
->error_count
, &userurb
->error_count
))
1710 if (usb_endpoint_xfer_isoc(&urb
->ep
->desc
)) {
1711 for (i
= 0; i
< urb
->number_of_packets
; i
++) {
1712 if (put_user(urb
->iso_frame_desc
[i
].actual_length
,
1713 &userurb
->iso_frame_desc
[i
].actual_length
))
1715 if (put_user(urb
->iso_frame_desc
[i
].status
,
1716 &userurb
->iso_frame_desc
[i
].status
))
1721 if (put_user(ptr_to_compat(addr
), (u32 __user
*)arg
))
1726 static int proc_reapurb_compat(struct dev_state
*ps
, void __user
*arg
)
1728 struct async
*as
= reap_as(ps
);
1730 int retval
= processcompl_compat(as
, (void __user
* __user
*)arg
);
1734 if (signal_pending(current
))
1739 static int proc_reapurbnonblock_compat(struct dev_state
*ps
, void __user
*arg
)
1745 as
= async_getcompleted(ps
);
1747 retval
= processcompl_compat(as
, (void __user
* __user
*)arg
);
1756 static int proc_disconnectsignal(struct dev_state
*ps
, void __user
*arg
)
1758 struct usbdevfs_disconnectsignal ds
;
1760 if (copy_from_user(&ds
, arg
, sizeof(ds
)))
1762 ps
->discsignr
= ds
.signr
;
1763 ps
->disccontext
= ds
.context
;
1767 static int proc_claiminterface(struct dev_state
*ps
, void __user
*arg
)
1771 if (get_user(ifnum
, (unsigned int __user
*)arg
))
1773 return claimintf(ps
, ifnum
);
1776 static int proc_releaseinterface(struct dev_state
*ps
, void __user
*arg
)
1781 if (get_user(ifnum
, (unsigned int __user
*)arg
))
1783 if ((ret
= releaseintf(ps
, ifnum
)) < 0)
1785 destroy_async_on_interface (ps
, ifnum
);
1789 static int proc_ioctl(struct dev_state
*ps
, struct usbdevfs_ioctl
*ctl
)
1794 struct usb_interface
*intf
= NULL
;
1795 struct usb_driver
*driver
= NULL
;
1798 if ((size
= _IOC_SIZE(ctl
->ioctl_code
)) > 0) {
1799 if ((buf
= kmalloc(size
, GFP_KERNEL
)) == NULL
)
1801 if ((_IOC_DIR(ctl
->ioctl_code
) & _IOC_WRITE
)) {
1802 if (copy_from_user(buf
, ctl
->data
, size
)) {
1807 memset(buf
, 0, size
);
1811 if (!connected(ps
)) {
1816 if (ps
->dev
->state
!= USB_STATE_CONFIGURED
)
1817 retval
= -EHOSTUNREACH
;
1818 else if (!(intf
= usb_ifnum_to_if(ps
->dev
, ctl
->ifno
)))
1820 else switch (ctl
->ioctl_code
) {
1822 /* disconnect kernel driver from interface */
1823 case USBDEVFS_DISCONNECT
:
1824 if (intf
->dev
.driver
) {
1825 driver
= to_usb_driver(intf
->dev
.driver
);
1826 dev_dbg(&intf
->dev
, "disconnect by usbfs\n");
1827 usb_driver_release_interface(driver
, intf
);
1832 /* let kernel drivers try to (re)bind to the interface */
1833 case USBDEVFS_CONNECT
:
1834 if (!intf
->dev
.driver
)
1835 retval
= device_attach(&intf
->dev
);
1840 /* talk directly to the interface's driver */
1842 if (intf
->dev
.driver
)
1843 driver
= to_usb_driver(intf
->dev
.driver
);
1844 if (driver
== NULL
|| driver
->unlocked_ioctl
== NULL
) {
1847 retval
= driver
->unlocked_ioctl(intf
, ctl
->ioctl_code
, buf
);
1848 if (retval
== -ENOIOCTLCMD
)
1853 /* cleanup and return */
1855 && (_IOC_DIR(ctl
->ioctl_code
) & _IOC_READ
) != 0
1857 && copy_to_user(ctl
->data
, buf
, size
) != 0)
1864 static int proc_ioctl_default(struct dev_state
*ps
, void __user
*arg
)
1866 struct usbdevfs_ioctl ctrl
;
1868 if (copy_from_user(&ctrl
, arg
, sizeof(ctrl
)))
1870 return proc_ioctl(ps
, &ctrl
);
1873 #ifdef CONFIG_COMPAT
1874 static int proc_ioctl_compat(struct dev_state
*ps
, compat_uptr_t arg
)
1876 struct usbdevfs_ioctl32 __user
*uioc
;
1877 struct usbdevfs_ioctl ctrl
;
1880 uioc
= compat_ptr((long)arg
);
1881 if (!access_ok(VERIFY_READ
, uioc
, sizeof(*uioc
)) ||
1882 __get_user(ctrl
.ifno
, &uioc
->ifno
) ||
1883 __get_user(ctrl
.ioctl_code
, &uioc
->ioctl_code
) ||
1884 __get_user(udata
, &uioc
->data
))
1886 ctrl
.data
= compat_ptr(udata
);
1888 return proc_ioctl(ps
, &ctrl
);
1892 static int proc_claim_port(struct dev_state
*ps
, void __user
*arg
)
1897 if (get_user(portnum
, (unsigned __user
*) arg
))
1899 rc
= usb_hub_claim_port(ps
->dev
, portnum
, ps
);
1901 snoop(&ps
->dev
->dev
, "port %d claimed by process %d: %s\n",
1902 portnum
, task_pid_nr(current
), current
->comm
);
1906 static int proc_release_port(struct dev_state
*ps
, void __user
*arg
)
1910 if (get_user(portnum
, (unsigned __user
*) arg
))
1912 return usb_hub_release_port(ps
->dev
, portnum
, ps
);
1915 static int proc_get_capabilities(struct dev_state
*ps
, void __user
*arg
)
1919 caps
= USBDEVFS_CAP_ZERO_PACKET
| USBDEVFS_CAP_NO_PACKET_SIZE_LIM
;
1920 if (!ps
->dev
->bus
->no_stop_on_short
)
1921 caps
|= USBDEVFS_CAP_BULK_CONTINUATION
;
1922 if (ps
->dev
->bus
->sg_tablesize
)
1923 caps
|= USBDEVFS_CAP_BULK_SCATTER_GATHER
;
1925 if (put_user(caps
, (__u32 __user
*)arg
))
1932 * NOTE: All requests here that have interface numbers as parameters
1933 * are assuming that somehow the configuration has been prevented from
1934 * changing. But there's no mechanism to ensure that...
1936 static long usbdev_do_ioctl(struct file
*file
, unsigned int cmd
,
1939 struct dev_state
*ps
= file
->private_data
;
1940 struct inode
*inode
= file
->f_path
.dentry
->d_inode
;
1941 struct usb_device
*dev
= ps
->dev
;
1944 if (!(file
->f_mode
& FMODE_WRITE
))
1947 usb_lock_device(dev
);
1948 if (!connected(ps
)) {
1949 usb_unlock_device(dev
);
1954 case USBDEVFS_CONTROL
:
1955 snoop(&dev
->dev
, "%s: CONTROL\n", __func__
);
1956 ret
= proc_control(ps
, p
);
1958 inode
->i_mtime
= CURRENT_TIME
;
1962 snoop(&dev
->dev
, "%s: BULK\n", __func__
);
1963 ret
= proc_bulk(ps
, p
);
1965 inode
->i_mtime
= CURRENT_TIME
;
1968 case USBDEVFS_RESETEP
:
1969 snoop(&dev
->dev
, "%s: RESETEP\n", __func__
);
1970 ret
= proc_resetep(ps
, p
);
1972 inode
->i_mtime
= CURRENT_TIME
;
1975 case USBDEVFS_RESET
:
1976 snoop(&dev
->dev
, "%s: RESET\n", __func__
);
1977 ret
= proc_resetdevice(ps
);
1980 case USBDEVFS_CLEAR_HALT
:
1981 snoop(&dev
->dev
, "%s: CLEAR_HALT\n", __func__
);
1982 ret
= proc_clearhalt(ps
, p
);
1984 inode
->i_mtime
= CURRENT_TIME
;
1987 case USBDEVFS_GETDRIVER
:
1988 snoop(&dev
->dev
, "%s: GETDRIVER\n", __func__
);
1989 ret
= proc_getdriver(ps
, p
);
1992 case USBDEVFS_CONNECTINFO
:
1993 snoop(&dev
->dev
, "%s: CONNECTINFO\n", __func__
);
1994 ret
= proc_connectinfo(ps
, p
);
1997 case USBDEVFS_SETINTERFACE
:
1998 snoop(&dev
->dev
, "%s: SETINTERFACE\n", __func__
);
1999 ret
= proc_setintf(ps
, p
);
2002 case USBDEVFS_SETCONFIGURATION
:
2003 snoop(&dev
->dev
, "%s: SETCONFIGURATION\n", __func__
);
2004 ret
= proc_setconfig(ps
, p
);
2007 case USBDEVFS_SUBMITURB
:
2008 snoop(&dev
->dev
, "%s: SUBMITURB\n", __func__
);
2009 ret
= proc_submiturb(ps
, p
);
2011 inode
->i_mtime
= CURRENT_TIME
;
2014 #ifdef CONFIG_COMPAT
2015 case USBDEVFS_CONTROL32
:
2016 snoop(&dev
->dev
, "%s: CONTROL32\n", __func__
);
2017 ret
= proc_control_compat(ps
, p
);
2019 inode
->i_mtime
= CURRENT_TIME
;
2022 case USBDEVFS_BULK32
:
2023 snoop(&dev
->dev
, "%s: BULK32\n", __func__
);
2024 ret
= proc_bulk_compat(ps
, p
);
2026 inode
->i_mtime
= CURRENT_TIME
;
2029 case USBDEVFS_DISCSIGNAL32
:
2030 snoop(&dev
->dev
, "%s: DISCSIGNAL32\n", __func__
);
2031 ret
= proc_disconnectsignal_compat(ps
, p
);
2034 case USBDEVFS_SUBMITURB32
:
2035 snoop(&dev
->dev
, "%s: SUBMITURB32\n", __func__
);
2036 ret
= proc_submiturb_compat(ps
, p
);
2038 inode
->i_mtime
= CURRENT_TIME
;
2041 case USBDEVFS_REAPURB32
:
2042 snoop(&dev
->dev
, "%s: REAPURB32\n", __func__
);
2043 ret
= proc_reapurb_compat(ps
, p
);
2046 case USBDEVFS_REAPURBNDELAY32
:
2047 snoop(&dev
->dev
, "%s: REAPURBNDELAY32\n", __func__
);
2048 ret
= proc_reapurbnonblock_compat(ps
, p
);
2051 case USBDEVFS_IOCTL32
:
2052 snoop(&dev
->dev
, "%s: IOCTL32\n", __func__
);
2053 ret
= proc_ioctl_compat(ps
, ptr_to_compat(p
));
2057 case USBDEVFS_DISCARDURB
:
2058 snoop(&dev
->dev
, "%s: DISCARDURB\n", __func__
);
2059 ret
= proc_unlinkurb(ps
, p
);
2062 case USBDEVFS_REAPURB
:
2063 snoop(&dev
->dev
, "%s: REAPURB\n", __func__
);
2064 ret
= proc_reapurb(ps
, p
);
2067 case USBDEVFS_REAPURBNDELAY
:
2068 snoop(&dev
->dev
, "%s: REAPURBNDELAY\n", __func__
);
2069 ret
= proc_reapurbnonblock(ps
, p
);
2072 case USBDEVFS_DISCSIGNAL
:
2073 snoop(&dev
->dev
, "%s: DISCSIGNAL\n", __func__
);
2074 ret
= proc_disconnectsignal(ps
, p
);
2077 case USBDEVFS_CLAIMINTERFACE
:
2078 snoop(&dev
->dev
, "%s: CLAIMINTERFACE\n", __func__
);
2079 ret
= proc_claiminterface(ps
, p
);
2082 case USBDEVFS_RELEASEINTERFACE
:
2083 snoop(&dev
->dev
, "%s: RELEASEINTERFACE\n", __func__
);
2084 ret
= proc_releaseinterface(ps
, p
);
2087 case USBDEVFS_IOCTL
:
2088 snoop(&dev
->dev
, "%s: IOCTL\n", __func__
);
2089 ret
= proc_ioctl_default(ps
, p
);
2092 case USBDEVFS_CLAIM_PORT
:
2093 snoop(&dev
->dev
, "%s: CLAIM_PORT\n", __func__
);
2094 ret
= proc_claim_port(ps
, p
);
2097 case USBDEVFS_RELEASE_PORT
:
2098 snoop(&dev
->dev
, "%s: RELEASE_PORT\n", __func__
);
2099 ret
= proc_release_port(ps
, p
);
2101 case USBDEVFS_GET_CAPABILITIES
:
2102 ret
= proc_get_capabilities(ps
, p
);
2105 usb_unlock_device(dev
);
2107 inode
->i_atime
= CURRENT_TIME
;
2111 static long usbdev_ioctl(struct file
*file
, unsigned int cmd
,
2116 ret
= usbdev_do_ioctl(file
, cmd
, (void __user
*)arg
);
2121 #ifdef CONFIG_COMPAT
2122 static long usbdev_compat_ioctl(struct file
*file
, unsigned int cmd
,
2127 ret
= usbdev_do_ioctl(file
, cmd
, compat_ptr(arg
));
2133 /* No kernel lock - fine */
2134 static unsigned int usbdev_poll(struct file
*file
,
2135 struct poll_table_struct
*wait
)
2137 struct dev_state
*ps
= file
->private_data
;
2138 unsigned int mask
= 0;
2140 poll_wait(file
, &ps
->wait
, wait
);
2141 if (file
->f_mode
& FMODE_WRITE
&& !list_empty(&ps
->async_completed
))
2142 mask
|= POLLOUT
| POLLWRNORM
;
2144 mask
|= POLLERR
| POLLHUP
;
2148 const struct file_operations usbdev_file_operations
= {
2149 .owner
= THIS_MODULE
,
2150 .llseek
= usbdev_lseek
,
2151 .read
= usbdev_read
,
2152 .poll
= usbdev_poll
,
2153 .unlocked_ioctl
= usbdev_ioctl
,
2154 #ifdef CONFIG_COMPAT
2155 .compat_ioctl
= usbdev_compat_ioctl
,
2157 .open
= usbdev_open
,
2158 .release
= usbdev_release
,
2161 static void usbdev_remove(struct usb_device
*udev
)
2163 struct dev_state
*ps
;
2164 struct siginfo sinfo
;
2166 while (!list_empty(&udev
->filelist
)) {
2167 ps
= list_entry(udev
->filelist
.next
, struct dev_state
, list
);
2168 destroy_all_async(ps
);
2169 wake_up_all(&ps
->wait
);
2170 list_del_init(&ps
->list
);
2171 if (ps
->discsignr
) {
2172 sinfo
.si_signo
= ps
->discsignr
;
2173 sinfo
.si_errno
= EPIPE
;
2174 sinfo
.si_code
= SI_ASYNCIO
;
2175 sinfo
.si_addr
= ps
->disccontext
;
2176 kill_pid_info_as_cred(ps
->discsignr
, &sinfo
,
2177 ps
->disc_pid
, ps
->cred
, ps
->secid
);
2182 static int usbdev_notify(struct notifier_block
*self
,
2183 unsigned long action
, void *dev
)
2186 case USB_DEVICE_ADD
:
2188 case USB_DEVICE_REMOVE
:
2195 static struct notifier_block usbdev_nb
= {
2196 .notifier_call
= usbdev_notify
,
2199 static struct cdev usb_device_cdev
;
2201 int __init
usb_devio_init(void)
2205 retval
= register_chrdev_region(USB_DEVICE_DEV
, USB_DEVICE_MAX
,
2208 printk(KERN_ERR
"Unable to register minors for usb_device\n");
2211 cdev_init(&usb_device_cdev
, &usbdev_file_operations
);
2212 retval
= cdev_add(&usb_device_cdev
, USB_DEVICE_DEV
, USB_DEVICE_MAX
);
2214 printk(KERN_ERR
"Unable to get usb_device major %d\n",
2218 usb_register_notify(&usbdev_nb
);
2223 unregister_chrdev_region(USB_DEVICE_DEV
, USB_DEVICE_MAX
);
2227 void usb_devio_cleanup(void)
2229 usb_unregister_notify(&usbdev_nb
);
2230 cdev_del(&usb_device_cdev
);
2231 unregister_chrdev_region(USB_DEVICE_DEV
, USB_DEVICE_MAX
);