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/sched/signal.h>
40 #include <linux/slab.h>
41 #include <linux/signal.h>
42 #include <linux/poll.h>
43 #include <linux/module.h>
44 #include <linux/string.h>
45 #include <linux/usb.h>
46 #include <linux/usbdevice_fs.h>
47 #include <linux/usb/hcd.h> /* for usbcore internals */
48 #include <linux/cdev.h>
49 #include <linux/notifier.h>
50 #include <linux/security.h>
51 #include <linux/user_namespace.h>
52 #include <linux/scatterlist.h>
53 #include <linux/uaccess.h>
54 #include <linux/dma-mapping.h>
55 #include <asm/byteorder.h>
56 #include <linux/moduleparam.h>
61 #define USB_DEVICE_MAX (USB_MAXBUS * 128)
62 #define USB_SG_SIZE 16384 /* split-size for large txs */
64 /* Mutual exclusion for removal, open, and release */
65 DEFINE_MUTEX(usbfs_mutex
);
67 struct usb_dev_state
{
68 struct list_head list
; /* state list */
69 struct usb_device
*dev
;
71 spinlock_t lock
; /* protects the async urb lists */
72 struct list_head async_pending
;
73 struct list_head async_completed
;
74 struct list_head memory_list
;
75 wait_queue_head_t wait
; /* wake up if a request completed */
76 unsigned int discsignr
;
78 const struct cred
*cred
;
79 void __user
*disccontext
;
80 unsigned long ifclaimed
;
82 u32 disabled_bulk_eps
;
83 bool privileges_dropped
;
84 unsigned long interface_allowed_mask
;
88 struct list_head memlist
;
93 dma_addr_t dma_handle
;
94 unsigned long vm_start
;
95 struct usb_dev_state
*ps
;
99 struct list_head asynclist
;
100 struct usb_dev_state
*ps
;
102 const struct cred
*cred
;
105 void __user
*userbuffer
;
106 void __user
*userurb
;
108 struct usb_memory
*usbm
;
109 unsigned int mem_usage
;
116 static bool usbfs_snoop
;
117 module_param(usbfs_snoop
, bool, S_IRUGO
| S_IWUSR
);
118 MODULE_PARM_DESC(usbfs_snoop
, "true to log all usbfs traffic");
120 static unsigned usbfs_snoop_max
= 65536;
121 module_param(usbfs_snoop_max
, uint
, S_IRUGO
| S_IWUSR
);
122 MODULE_PARM_DESC(usbfs_snoop_max
,
123 "maximum number of bytes to print while snooping");
125 #define snoop(dev, format, arg...) \
128 dev_info(dev, format, ## arg); \
135 #define USB_DEVICE_DEV MKDEV(USB_DEVICE_MAJOR, 0)
137 /* Limit on the total amount of memory we can allocate for transfers */
138 static u32 usbfs_memory_mb
= 16;
139 module_param(usbfs_memory_mb
, uint
, 0644);
140 MODULE_PARM_DESC(usbfs_memory_mb
,
141 "maximum MB allowed for usbfs buffers (0 = no limit)");
143 /* Hard limit, necessary to avoid arithmetic overflow */
144 #define USBFS_XFER_MAX (UINT_MAX / 2 - 1000000)
146 static atomic64_t usbfs_memory_usage
; /* Total memory currently allocated */
148 /* Check whether it's okay to allocate more memory for a transfer */
149 static int usbfs_increase_memory_usage(u64 amount
)
153 lim
= ACCESS_ONCE(usbfs_memory_mb
);
156 atomic64_add(amount
, &usbfs_memory_usage
);
158 if (lim
> 0 && atomic64_read(&usbfs_memory_usage
) > lim
) {
159 atomic64_sub(amount
, &usbfs_memory_usage
);
166 /* Memory for a transfer is being deallocated */
167 static void usbfs_decrease_memory_usage(u64 amount
)
169 atomic64_sub(amount
, &usbfs_memory_usage
);
172 static int connected(struct usb_dev_state
*ps
)
174 return (!list_empty(&ps
->list
) &&
175 ps
->dev
->state
!= USB_STATE_NOTATTACHED
);
178 static void dec_usb_memory_use_count(struct usb_memory
*usbm
, int *count
)
180 struct usb_dev_state
*ps
= usbm
->ps
;
183 spin_lock_irqsave(&ps
->lock
, flags
);
185 if (usbm
->urb_use_count
== 0 && usbm
->vma_use_count
== 0) {
186 list_del(&usbm
->memlist
);
187 spin_unlock_irqrestore(&ps
->lock
, flags
);
189 usb_free_coherent(ps
->dev
, usbm
->size
, usbm
->mem
,
191 usbfs_decrease_memory_usage(
192 usbm
->size
+ sizeof(struct usb_memory
));
195 spin_unlock_irqrestore(&ps
->lock
, flags
);
199 static void usbdev_vm_open(struct vm_area_struct
*vma
)
201 struct usb_memory
*usbm
= vma
->vm_private_data
;
204 spin_lock_irqsave(&usbm
->ps
->lock
, flags
);
205 ++usbm
->vma_use_count
;
206 spin_unlock_irqrestore(&usbm
->ps
->lock
, flags
);
209 static void usbdev_vm_close(struct vm_area_struct
*vma
)
211 struct usb_memory
*usbm
= vma
->vm_private_data
;
213 dec_usb_memory_use_count(usbm
, &usbm
->vma_use_count
);
216 static const struct vm_operations_struct usbdev_vm_ops
= {
217 .open
= usbdev_vm_open
,
218 .close
= usbdev_vm_close
221 static int usbdev_mmap(struct file
*file
, struct vm_area_struct
*vma
)
223 struct usb_memory
*usbm
= NULL
;
224 struct usb_dev_state
*ps
= file
->private_data
;
225 size_t size
= vma
->vm_end
- vma
->vm_start
;
228 dma_addr_t dma_handle
;
231 ret
= usbfs_increase_memory_usage(size
+ sizeof(struct usb_memory
));
235 usbm
= kzalloc(sizeof(struct usb_memory
), GFP_KERNEL
);
238 goto error_decrease_mem
;
241 mem
= usb_alloc_coherent(ps
->dev
, size
, GFP_USER
| __GFP_NOWARN
,
245 goto error_free_usbm
;
248 memset(mem
, 0, size
);
251 usbm
->dma_handle
= dma_handle
;
254 usbm
->vm_start
= vma
->vm_start
;
255 usbm
->vma_use_count
= 1;
256 INIT_LIST_HEAD(&usbm
->memlist
);
258 if (remap_pfn_range(vma
, vma
->vm_start
,
259 virt_to_phys(usbm
->mem
) >> PAGE_SHIFT
,
260 size
, vma
->vm_page_prot
) < 0) {
261 dec_usb_memory_use_count(usbm
, &usbm
->vma_use_count
);
265 vma
->vm_flags
|= VM_IO
;
266 vma
->vm_flags
|= (VM_DONTEXPAND
| VM_DONTDUMP
);
267 vma
->vm_ops
= &usbdev_vm_ops
;
268 vma
->vm_private_data
= usbm
;
270 spin_lock_irqsave(&ps
->lock
, flags
);
271 list_add_tail(&usbm
->memlist
, &ps
->memory_list
);
272 spin_unlock_irqrestore(&ps
->lock
, flags
);
279 usbfs_decrease_memory_usage(size
+ sizeof(struct usb_memory
));
284 static ssize_t
usbdev_read(struct file
*file
, char __user
*buf
, size_t nbytes
,
287 struct usb_dev_state
*ps
= file
->private_data
;
288 struct usb_device
*dev
= ps
->dev
;
295 usb_lock_device(dev
);
296 if (!connected(ps
)) {
299 } else if (pos
< 0) {
304 if (pos
< sizeof(struct usb_device_descriptor
)) {
305 /* 18 bytes - fits on the stack */
306 struct usb_device_descriptor temp_desc
;
308 memcpy(&temp_desc
, &dev
->descriptor
, sizeof(dev
->descriptor
));
309 le16_to_cpus(&temp_desc
.bcdUSB
);
310 le16_to_cpus(&temp_desc
.idVendor
);
311 le16_to_cpus(&temp_desc
.idProduct
);
312 le16_to_cpus(&temp_desc
.bcdDevice
);
314 len
= sizeof(struct usb_device_descriptor
) - pos
;
317 if (copy_to_user(buf
, ((char *)&temp_desc
) + pos
, len
)) {
328 pos
= sizeof(struct usb_device_descriptor
);
329 for (i
= 0; nbytes
&& i
< dev
->descriptor
.bNumConfigurations
; i
++) {
330 struct usb_config_descriptor
*config
=
331 (struct usb_config_descriptor
*)dev
->rawdescriptors
[i
];
332 unsigned int length
= le16_to_cpu(config
->wTotalLength
);
334 if (*ppos
< pos
+ length
) {
336 /* The descriptor may claim to be longer than it
337 * really is. Here is the actual allocated length. */
339 le16_to_cpu(dev
->config
[i
].desc
.wTotalLength
);
341 len
= length
- (*ppos
- pos
);
345 /* Simply don't write (skip over) unallocated parts */
346 if (alloclen
> (*ppos
- pos
)) {
347 alloclen
-= (*ppos
- pos
);
348 if (copy_to_user(buf
,
349 dev
->rawdescriptors
[i
] + (*ppos
- pos
),
350 min(len
, alloclen
))) {
366 usb_unlock_device(dev
);
371 * async list handling
374 static struct async
*alloc_async(unsigned int numisoframes
)
378 as
= kzalloc(sizeof(struct async
), GFP_KERNEL
);
381 as
->urb
= usb_alloc_urb(numisoframes
, GFP_KERNEL
);
389 static void free_async(struct async
*as
)
396 for (i
= 0; i
< as
->urb
->num_sgs
; i
++) {
397 if (sg_page(&as
->urb
->sg
[i
]))
398 kfree(sg_virt(&as
->urb
->sg
[i
]));
402 if (as
->usbm
== NULL
)
403 kfree(as
->urb
->transfer_buffer
);
405 dec_usb_memory_use_count(as
->usbm
, &as
->usbm
->urb_use_count
);
407 kfree(as
->urb
->setup_packet
);
408 usb_free_urb(as
->urb
);
409 usbfs_decrease_memory_usage(as
->mem_usage
);
413 static void async_newpending(struct async
*as
)
415 struct usb_dev_state
*ps
= as
->ps
;
418 spin_lock_irqsave(&ps
->lock
, flags
);
419 list_add_tail(&as
->asynclist
, &ps
->async_pending
);
420 spin_unlock_irqrestore(&ps
->lock
, flags
);
423 static void async_removepending(struct async
*as
)
425 struct usb_dev_state
*ps
= as
->ps
;
428 spin_lock_irqsave(&ps
->lock
, flags
);
429 list_del_init(&as
->asynclist
);
430 spin_unlock_irqrestore(&ps
->lock
, flags
);
433 static struct async
*async_getcompleted(struct usb_dev_state
*ps
)
436 struct async
*as
= NULL
;
438 spin_lock_irqsave(&ps
->lock
, flags
);
439 if (!list_empty(&ps
->async_completed
)) {
440 as
= list_entry(ps
->async_completed
.next
, struct async
,
442 list_del_init(&as
->asynclist
);
444 spin_unlock_irqrestore(&ps
->lock
, flags
);
448 static struct async
*async_getpending(struct usb_dev_state
*ps
,
449 void __user
*userurb
)
453 list_for_each_entry(as
, &ps
->async_pending
, asynclist
)
454 if (as
->userurb
== userurb
) {
455 list_del_init(&as
->asynclist
);
462 static void snoop_urb(struct usb_device
*udev
,
463 void __user
*userurb
, int pipe
, unsigned length
,
464 int timeout_or_status
, enum snoop_when when
,
465 unsigned char *data
, unsigned data_len
)
467 static const char *types
[] = {"isoc", "int", "ctrl", "bulk"};
468 static const char *dirs
[] = {"out", "in"};
475 ep
= usb_pipeendpoint(pipe
);
476 t
= types
[usb_pipetype(pipe
)];
477 d
= dirs
[!!usb_pipein(pipe
)];
479 if (userurb
) { /* Async */
481 dev_info(&udev
->dev
, "userurb %pK, ep%d %s-%s, "
483 userurb
, ep
, t
, d
, length
);
485 dev_info(&udev
->dev
, "userurb %pK, ep%d %s-%s, "
486 "actual_length %u status %d\n",
487 userurb
, ep
, t
, d
, length
,
491 dev_info(&udev
->dev
, "ep%d %s-%s, length %u, "
493 ep
, t
, d
, length
, timeout_or_status
);
495 dev_info(&udev
->dev
, "ep%d %s-%s, actual_length %u, "
497 ep
, t
, d
, length
, timeout_or_status
);
500 data_len
= min(data_len
, usbfs_snoop_max
);
501 if (data
&& data_len
> 0) {
502 print_hex_dump(KERN_DEBUG
, "data: ", DUMP_PREFIX_NONE
, 32, 1,
507 static void snoop_urb_data(struct urb
*urb
, unsigned len
)
511 len
= min(len
, usbfs_snoop_max
);
512 if (!usbfs_snoop
|| len
== 0)
515 if (urb
->num_sgs
== 0) {
516 print_hex_dump(KERN_DEBUG
, "data: ", DUMP_PREFIX_NONE
, 32, 1,
517 urb
->transfer_buffer
, len
, 1);
521 for (i
= 0; i
< urb
->num_sgs
&& len
; i
++) {
522 size
= (len
> USB_SG_SIZE
) ? USB_SG_SIZE
: len
;
523 print_hex_dump(KERN_DEBUG
, "data: ", DUMP_PREFIX_NONE
, 32, 1,
524 sg_virt(&urb
->sg
[i
]), size
, 1);
529 static int copy_urb_data_to_user(u8 __user
*userbuffer
, struct urb
*urb
)
531 unsigned i
, len
, size
;
533 if (urb
->number_of_packets
> 0) /* Isochronous */
534 len
= urb
->transfer_buffer_length
;
536 len
= urb
->actual_length
;
538 if (urb
->num_sgs
== 0) {
539 if (copy_to_user(userbuffer
, urb
->transfer_buffer
, len
))
544 for (i
= 0; i
< urb
->num_sgs
&& len
; i
++) {
545 size
= (len
> USB_SG_SIZE
) ? USB_SG_SIZE
: len
;
546 if (copy_to_user(userbuffer
, sg_virt(&urb
->sg
[i
]), size
))
555 #define AS_CONTINUATION 1
558 static void cancel_bulk_urbs(struct usb_dev_state
*ps
, unsigned bulk_addr
)
565 /* Mark all the pending URBs that match bulk_addr, up to but not
566 * including the first one without AS_CONTINUATION. If such an
567 * URB is encountered then a new transfer has already started so
568 * the endpoint doesn't need to be disabled; otherwise it does.
570 list_for_each_entry(as
, &ps
->async_pending
, asynclist
) {
571 if (as
->bulk_addr
== bulk_addr
) {
572 if (as
->bulk_status
!= AS_CONTINUATION
)
574 as
->bulk_status
= AS_UNLINK
;
578 ps
->disabled_bulk_eps
|= (1 << bulk_addr
);
580 /* Now carefully unlink all the marked pending URBs */
582 list_for_each_entry(as
, &ps
->async_pending
, asynclist
) {
583 if (as
->bulk_status
== AS_UNLINK
) {
584 as
->bulk_status
= 0; /* Only once */
587 spin_unlock(&ps
->lock
); /* Allow completions */
590 spin_lock(&ps
->lock
);
596 static void async_completed(struct urb
*urb
)
598 struct async
*as
= urb
->context
;
599 struct usb_dev_state
*ps
= as
->ps
;
600 struct siginfo sinfo
;
601 struct pid
*pid
= NULL
;
603 const struct cred
*cred
= NULL
;
606 spin_lock(&ps
->lock
);
607 list_move_tail(&as
->asynclist
, &ps
->async_completed
);
608 as
->status
= urb
->status
;
611 memset(&sinfo
, 0, sizeof(sinfo
));
612 sinfo
.si_signo
= as
->signr
;
613 sinfo
.si_errno
= as
->status
;
614 sinfo
.si_code
= SI_ASYNCIO
;
615 sinfo
.si_addr
= as
->userurb
;
616 pid
= get_pid(as
->pid
);
617 cred
= get_cred(as
->cred
);
620 snoop(&urb
->dev
->dev
, "urb complete\n");
621 snoop_urb(urb
->dev
, as
->userurb
, urb
->pipe
, urb
->actual_length
,
622 as
->status
, COMPLETE
, NULL
, 0);
623 if ((urb
->transfer_flags
& URB_DIR_MASK
) == URB_DIR_IN
)
624 snoop_urb_data(urb
, urb
->actual_length
);
626 if (as
->status
< 0 && as
->bulk_addr
&& as
->status
!= -ECONNRESET
&&
627 as
->status
!= -ENOENT
)
628 cancel_bulk_urbs(ps
, as
->bulk_addr
);
631 spin_unlock(&ps
->lock
);
634 kill_pid_info_as_cred(sinfo
.si_signo
, &sinfo
, pid
, cred
, secid
);
640 static void destroy_async(struct usb_dev_state
*ps
, struct list_head
*list
)
646 spin_lock_irqsave(&ps
->lock
, flags
);
647 while (!list_empty(list
)) {
648 as
= list_entry(list
->next
, struct async
, asynclist
);
649 list_del_init(&as
->asynclist
);
653 /* drop the spinlock so the completion handler can run */
654 spin_unlock_irqrestore(&ps
->lock
, flags
);
657 spin_lock_irqsave(&ps
->lock
, flags
);
659 spin_unlock_irqrestore(&ps
->lock
, flags
);
662 static void destroy_async_on_interface(struct usb_dev_state
*ps
,
665 struct list_head
*p
, *q
, hitlist
;
668 INIT_LIST_HEAD(&hitlist
);
669 spin_lock_irqsave(&ps
->lock
, flags
);
670 list_for_each_safe(p
, q
, &ps
->async_pending
)
671 if (ifnum
== list_entry(p
, struct async
, asynclist
)->ifnum
)
672 list_move_tail(p
, &hitlist
);
673 spin_unlock_irqrestore(&ps
->lock
, flags
);
674 destroy_async(ps
, &hitlist
);
677 static void destroy_all_async(struct usb_dev_state
*ps
)
679 destroy_async(ps
, &ps
->async_pending
);
683 * interface claims are made only at the request of user level code,
684 * which can also release them (explicitly or by closing files).
685 * they're also undone when devices disconnect.
688 static int driver_probe(struct usb_interface
*intf
,
689 const struct usb_device_id
*id
)
694 static void driver_disconnect(struct usb_interface
*intf
)
696 struct usb_dev_state
*ps
= usb_get_intfdata(intf
);
697 unsigned int ifnum
= intf
->altsetting
->desc
.bInterfaceNumber
;
702 /* NOTE: this relies on usbcore having canceled and completed
703 * all pending I/O requests; 2.6 does that.
706 if (likely(ifnum
< 8*sizeof(ps
->ifclaimed
)))
707 clear_bit(ifnum
, &ps
->ifclaimed
);
709 dev_warn(&intf
->dev
, "interface number %u out of range\n",
712 usb_set_intfdata(intf
, NULL
);
714 /* force async requests to complete */
715 destroy_async_on_interface(ps
, ifnum
);
718 /* The following routines are merely placeholders. There is no way
719 * to inform a user task about suspend or resumes.
721 static int driver_suspend(struct usb_interface
*intf
, pm_message_t msg
)
726 static int driver_resume(struct usb_interface
*intf
)
731 struct usb_driver usbfs_driver
= {
733 .probe
= driver_probe
,
734 .disconnect
= driver_disconnect
,
735 .suspend
= driver_suspend
,
736 .resume
= driver_resume
,
739 static int claimintf(struct usb_dev_state
*ps
, unsigned int ifnum
)
741 struct usb_device
*dev
= ps
->dev
;
742 struct usb_interface
*intf
;
745 if (ifnum
>= 8*sizeof(ps
->ifclaimed
))
747 /* already claimed */
748 if (test_bit(ifnum
, &ps
->ifclaimed
))
751 if (ps
->privileges_dropped
&&
752 !test_bit(ifnum
, &ps
->interface_allowed_mask
))
755 intf
= usb_ifnum_to_if(dev
, ifnum
);
759 err
= usb_driver_claim_interface(&usbfs_driver
, intf
, ps
);
761 set_bit(ifnum
, &ps
->ifclaimed
);
765 static int releaseintf(struct usb_dev_state
*ps
, unsigned int ifnum
)
767 struct usb_device
*dev
;
768 struct usb_interface
*intf
;
772 if (ifnum
>= 8*sizeof(ps
->ifclaimed
))
775 intf
= usb_ifnum_to_if(dev
, ifnum
);
778 else if (test_and_clear_bit(ifnum
, &ps
->ifclaimed
)) {
779 usb_driver_release_interface(&usbfs_driver
, intf
);
785 static int checkintf(struct usb_dev_state
*ps
, unsigned int ifnum
)
787 if (ps
->dev
->state
!= USB_STATE_CONFIGURED
)
788 return -EHOSTUNREACH
;
789 if (ifnum
>= 8*sizeof(ps
->ifclaimed
))
791 if (test_bit(ifnum
, &ps
->ifclaimed
))
793 /* if not yet claimed, claim it for the driver */
794 dev_warn(&ps
->dev
->dev
, "usbfs: process %d (%s) did not claim "
795 "interface %u before use\n", task_pid_nr(current
),
796 current
->comm
, ifnum
);
797 return claimintf(ps
, ifnum
);
800 static int findintfep(struct usb_device
*dev
, unsigned int ep
)
802 unsigned int i
, j
, e
;
803 struct usb_interface
*intf
;
804 struct usb_host_interface
*alts
;
805 struct usb_endpoint_descriptor
*endpt
;
807 if (ep
& ~(USB_DIR_IN
|0xf))
811 for (i
= 0; i
< dev
->actconfig
->desc
.bNumInterfaces
; i
++) {
812 intf
= dev
->actconfig
->interface
[i
];
813 for (j
= 0; j
< intf
->num_altsetting
; j
++) {
814 alts
= &intf
->altsetting
[j
];
815 for (e
= 0; e
< alts
->desc
.bNumEndpoints
; e
++) {
816 endpt
= &alts
->endpoint
[e
].desc
;
817 if (endpt
->bEndpointAddress
== ep
)
818 return alts
->desc
.bInterfaceNumber
;
825 static int check_ctrlrecip(struct usb_dev_state
*ps
, unsigned int requesttype
,
826 unsigned int request
, unsigned int index
)
829 struct usb_host_interface
*alt_setting
;
831 if (ps
->dev
->state
!= USB_STATE_UNAUTHENTICATED
832 && ps
->dev
->state
!= USB_STATE_ADDRESS
833 && ps
->dev
->state
!= USB_STATE_CONFIGURED
)
834 return -EHOSTUNREACH
;
835 if (USB_TYPE_VENDOR
== (USB_TYPE_MASK
& requesttype
))
839 * check for the special corner case 'get_device_id' in the printer
840 * class specification, which we always want to allow as it is used
841 * to query things like ink level, etc.
843 if (requesttype
== 0xa1 && request
== 0) {
844 alt_setting
= usb_find_alt_setting(ps
->dev
->actconfig
,
845 index
>> 8, index
& 0xff);
847 && alt_setting
->desc
.bInterfaceClass
== USB_CLASS_PRINTER
)
852 switch (requesttype
& USB_RECIP_MASK
) {
853 case USB_RECIP_ENDPOINT
:
854 if ((index
& ~USB_DIR_IN
) == 0)
856 ret
= findintfep(ps
->dev
, index
);
859 * Some not fully compliant Win apps seem to get
860 * index wrong and have the endpoint number here
861 * rather than the endpoint address (with the
862 * correct direction). Win does let this through,
863 * so we'll not reject it here but leave it to
864 * the device to not break KVM. But we warn.
866 ret
= findintfep(ps
->dev
, index
^ 0x80);
868 dev_info(&ps
->dev
->dev
,
869 "%s: process %i (%s) requesting ep %02x but needs %02x\n",
870 __func__
, task_pid_nr(current
),
871 current
->comm
, index
, index
^ 0x80);
874 ret
= checkintf(ps
, ret
);
877 case USB_RECIP_INTERFACE
:
878 ret
= checkintf(ps
, index
);
884 static struct usb_host_endpoint
*ep_to_host_endpoint(struct usb_device
*dev
,
887 if (ep
& USB_ENDPOINT_DIR_MASK
)
888 return dev
->ep_in
[ep
& USB_ENDPOINT_NUMBER_MASK
];
890 return dev
->ep_out
[ep
& USB_ENDPOINT_NUMBER_MASK
];
893 static int parse_usbdevfs_streams(struct usb_dev_state
*ps
,
894 struct usbdevfs_streams __user
*streams
,
895 unsigned int *num_streams_ret
,
896 unsigned int *num_eps_ret
,
897 struct usb_host_endpoint
***eps_ret
,
898 struct usb_interface
**intf_ret
)
900 unsigned int i
, num_streams
, num_eps
;
901 struct usb_host_endpoint
**eps
;
902 struct usb_interface
*intf
= NULL
;
906 if (get_user(num_streams
, &streams
->num_streams
) ||
907 get_user(num_eps
, &streams
->num_eps
))
910 if (num_eps
< 1 || num_eps
> USB_MAXENDPOINTS
)
913 /* The XHCI controller allows max 2 ^ 16 streams */
914 if (num_streams_ret
&& (num_streams
< 2 || num_streams
> 65536))
917 eps
= kmalloc(num_eps
* sizeof(*eps
), GFP_KERNEL
);
921 for (i
= 0; i
< num_eps
; i
++) {
922 if (get_user(ep
, &streams
->eps
[i
])) {
926 eps
[i
] = ep_to_host_endpoint(ps
->dev
, ep
);
932 /* usb_alloc/free_streams operate on an usb_interface */
933 ifnum
= findintfep(ps
->dev
, ep
);
940 ret
= checkintf(ps
, ifnum
);
943 intf
= usb_ifnum_to_if(ps
->dev
, ifnum
);
945 /* Verify all eps belong to the same interface */
946 if (ifnum
!= intf
->altsetting
->desc
.bInterfaceNumber
) {
954 *num_streams_ret
= num_streams
;
955 *num_eps_ret
= num_eps
;
966 static int match_devt(struct device
*dev
, void *data
)
968 return dev
->devt
== (dev_t
) (unsigned long) data
;
971 static struct usb_device
*usbdev_lookup_by_devt(dev_t devt
)
975 dev
= bus_find_device(&usb_bus_type
, NULL
,
976 (void *) (unsigned long) devt
, match_devt
);
979 return to_usb_device(dev
);
985 static int usbdev_open(struct inode
*inode
, struct file
*file
)
987 struct usb_device
*dev
= NULL
;
988 struct usb_dev_state
*ps
;
992 ps
= kzalloc(sizeof(struct usb_dev_state
), GFP_KERNEL
);
998 /* Protect against simultaneous removal or release */
999 mutex_lock(&usbfs_mutex
);
1001 /* usbdev device-node */
1002 if (imajor(inode
) == USB_DEVICE_MAJOR
)
1003 dev
= usbdev_lookup_by_devt(inode
->i_rdev
);
1005 mutex_unlock(&usbfs_mutex
);
1010 usb_lock_device(dev
);
1011 if (dev
->state
== USB_STATE_NOTATTACHED
)
1012 goto out_unlock_device
;
1014 ret
= usb_autoresume_device(dev
);
1016 goto out_unlock_device
;
1020 ps
->interface_allowed_mask
= 0xFFFFFFFF; /* 32 bits */
1021 spin_lock_init(&ps
->lock
);
1022 INIT_LIST_HEAD(&ps
->list
);
1023 INIT_LIST_HEAD(&ps
->async_pending
);
1024 INIT_LIST_HEAD(&ps
->async_completed
);
1025 INIT_LIST_HEAD(&ps
->memory_list
);
1026 init_waitqueue_head(&ps
->wait
);
1027 ps
->disc_pid
= get_pid(task_pid(current
));
1028 ps
->cred
= get_current_cred();
1029 security_task_getsecid(current
, &ps
->secid
);
1031 list_add_tail(&ps
->list
, &dev
->filelist
);
1032 file
->private_data
= ps
;
1033 usb_unlock_device(dev
);
1034 snoop(&dev
->dev
, "opened by process %d: %s\n", task_pid_nr(current
),
1039 usb_unlock_device(dev
);
1046 static int usbdev_release(struct inode
*inode
, struct file
*file
)
1048 struct usb_dev_state
*ps
= file
->private_data
;
1049 struct usb_device
*dev
= ps
->dev
;
1053 usb_lock_device(dev
);
1054 usb_hub_release_all_ports(dev
, ps
);
1056 list_del_init(&ps
->list
);
1058 for (ifnum
= 0; ps
->ifclaimed
&& ifnum
< 8*sizeof(ps
->ifclaimed
);
1060 if (test_bit(ifnum
, &ps
->ifclaimed
))
1061 releaseintf(ps
, ifnum
);
1063 destroy_all_async(ps
);
1064 usb_autosuspend_device(dev
);
1065 usb_unlock_device(dev
);
1067 put_pid(ps
->disc_pid
);
1070 as
= async_getcompleted(ps
);
1073 as
= async_getcompleted(ps
);
1080 static int proc_control(struct usb_dev_state
*ps
, void __user
*arg
)
1082 struct usb_device
*dev
= ps
->dev
;
1083 struct usbdevfs_ctrltransfer ctrl
;
1085 unsigned char *tbuf
;
1089 if (copy_from_user(&ctrl
, arg
, sizeof(ctrl
)))
1091 ret
= check_ctrlrecip(ps
, ctrl
.bRequestType
, ctrl
.bRequest
,
1095 wLength
= ctrl
.wLength
; /* To suppress 64k PAGE_SIZE warning */
1096 if (wLength
> PAGE_SIZE
)
1098 ret
= usbfs_increase_memory_usage(PAGE_SIZE
+ sizeof(struct urb
) +
1099 sizeof(struct usb_ctrlrequest
));
1102 tbuf
= (unsigned char *)__get_free_page(GFP_KERNEL
);
1108 snoop(&dev
->dev
, "control urb: bRequestType=%02x "
1109 "bRequest=%02x wValue=%04x "
1110 "wIndex=%04x wLength=%04x\n",
1111 ctrl
.bRequestType
, ctrl
.bRequest
, ctrl
.wValue
,
1112 ctrl
.wIndex
, ctrl
.wLength
);
1113 if (ctrl
.bRequestType
& 0x80) {
1114 if (ctrl
.wLength
&& !access_ok(VERIFY_WRITE
, ctrl
.data
,
1119 pipe
= usb_rcvctrlpipe(dev
, 0);
1120 snoop_urb(dev
, NULL
, pipe
, ctrl
.wLength
, tmo
, SUBMIT
, NULL
, 0);
1122 usb_unlock_device(dev
);
1123 i
= usb_control_msg(dev
, pipe
, ctrl
.bRequest
,
1124 ctrl
.bRequestType
, ctrl
.wValue
, ctrl
.wIndex
,
1125 tbuf
, ctrl
.wLength
, tmo
);
1126 usb_lock_device(dev
);
1127 snoop_urb(dev
, NULL
, pipe
, max(i
, 0), min(i
, 0), COMPLETE
,
1129 if ((i
> 0) && ctrl
.wLength
) {
1130 if (copy_to_user(ctrl
.data
, tbuf
, i
)) {
1137 if (copy_from_user(tbuf
, ctrl
.data
, ctrl
.wLength
)) {
1142 pipe
= usb_sndctrlpipe(dev
, 0);
1143 snoop_urb(dev
, NULL
, pipe
, ctrl
.wLength
, tmo
, SUBMIT
,
1144 tbuf
, ctrl
.wLength
);
1146 usb_unlock_device(dev
);
1147 i
= usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0), ctrl
.bRequest
,
1148 ctrl
.bRequestType
, ctrl
.wValue
, ctrl
.wIndex
,
1149 tbuf
, ctrl
.wLength
, tmo
);
1150 usb_lock_device(dev
);
1151 snoop_urb(dev
, NULL
, pipe
, max(i
, 0), min(i
, 0), COMPLETE
, NULL
, 0);
1153 if (i
< 0 && i
!= -EPIPE
) {
1154 dev_printk(KERN_DEBUG
, &dev
->dev
, "usbfs: USBDEVFS_CONTROL "
1155 "failed cmd %s rqt %u rq %u len %u ret %d\n",
1156 current
->comm
, ctrl
.bRequestType
, ctrl
.bRequest
,
1161 free_page((unsigned long) tbuf
);
1162 usbfs_decrease_memory_usage(PAGE_SIZE
+ sizeof(struct urb
) +
1163 sizeof(struct usb_ctrlrequest
));
1167 static int proc_bulk(struct usb_dev_state
*ps
, void __user
*arg
)
1169 struct usb_device
*dev
= ps
->dev
;
1170 struct usbdevfs_bulktransfer bulk
;
1171 unsigned int tmo
, len1
, pipe
;
1173 unsigned char *tbuf
;
1176 if (copy_from_user(&bulk
, arg
, sizeof(bulk
)))
1178 ret
= findintfep(ps
->dev
, bulk
.ep
);
1181 ret
= checkintf(ps
, ret
);
1184 if (bulk
.ep
& USB_DIR_IN
)
1185 pipe
= usb_rcvbulkpipe(dev
, bulk
.ep
& 0x7f);
1187 pipe
= usb_sndbulkpipe(dev
, bulk
.ep
& 0x7f);
1188 if (!usb_maxpacket(dev
, pipe
, !(bulk
.ep
& USB_DIR_IN
)))
1191 if (len1
>= (INT_MAX
- sizeof(struct urb
)))
1193 ret
= usbfs_increase_memory_usage(len1
+ sizeof(struct urb
));
1196 tbuf
= kmalloc(len1
, GFP_KERNEL
);
1202 if (bulk
.ep
& 0x80) {
1203 if (len1
&& !access_ok(VERIFY_WRITE
, bulk
.data
, len1
)) {
1207 snoop_urb(dev
, NULL
, pipe
, len1
, tmo
, SUBMIT
, NULL
, 0);
1209 usb_unlock_device(dev
);
1210 i
= usb_bulk_msg(dev
, pipe
, tbuf
, len1
, &len2
, tmo
);
1211 usb_lock_device(dev
);
1212 snoop_urb(dev
, NULL
, pipe
, len2
, i
, COMPLETE
, tbuf
, len2
);
1215 if (copy_to_user(bulk
.data
, tbuf
, len2
)) {
1222 if (copy_from_user(tbuf
, bulk
.data
, len1
)) {
1227 snoop_urb(dev
, NULL
, pipe
, len1
, tmo
, SUBMIT
, tbuf
, len1
);
1229 usb_unlock_device(dev
);
1230 i
= usb_bulk_msg(dev
, pipe
, tbuf
, len1
, &len2
, tmo
);
1231 usb_lock_device(dev
);
1232 snoop_urb(dev
, NULL
, pipe
, len2
, i
, COMPLETE
, NULL
, 0);
1234 ret
= (i
< 0 ? i
: len2
);
1237 usbfs_decrease_memory_usage(len1
+ sizeof(struct urb
));
1241 static void check_reset_of_active_ep(struct usb_device
*udev
,
1242 unsigned int epnum
, char *ioctl_name
)
1244 struct usb_host_endpoint
**eps
;
1245 struct usb_host_endpoint
*ep
;
1247 eps
= (epnum
& USB_DIR_IN
) ? udev
->ep_in
: udev
->ep_out
;
1248 ep
= eps
[epnum
& 0x0f];
1249 if (ep
&& !list_empty(&ep
->urb_list
))
1250 dev_warn(&udev
->dev
, "Process %d (%s) called USBDEVFS_%s for active endpoint 0x%02x\n",
1251 task_pid_nr(current
), current
->comm
,
1255 static int proc_resetep(struct usb_dev_state
*ps
, void __user
*arg
)
1260 if (get_user(ep
, (unsigned int __user
*)arg
))
1262 ret
= findintfep(ps
->dev
, ep
);
1265 ret
= checkintf(ps
, ret
);
1268 check_reset_of_active_ep(ps
->dev
, ep
, "RESETEP");
1269 usb_reset_endpoint(ps
->dev
, ep
);
1273 static int proc_clearhalt(struct usb_dev_state
*ps
, void __user
*arg
)
1279 if (get_user(ep
, (unsigned int __user
*)arg
))
1281 ret
= findintfep(ps
->dev
, ep
);
1284 ret
= checkintf(ps
, ret
);
1287 check_reset_of_active_ep(ps
->dev
, ep
, "CLEAR_HALT");
1288 if (ep
& USB_DIR_IN
)
1289 pipe
= usb_rcvbulkpipe(ps
->dev
, ep
& 0x7f);
1291 pipe
= usb_sndbulkpipe(ps
->dev
, ep
& 0x7f);
1293 return usb_clear_halt(ps
->dev
, pipe
);
1296 static int proc_getdriver(struct usb_dev_state
*ps
, void __user
*arg
)
1298 struct usbdevfs_getdriver gd
;
1299 struct usb_interface
*intf
;
1302 if (copy_from_user(&gd
, arg
, sizeof(gd
)))
1304 intf
= usb_ifnum_to_if(ps
->dev
, gd
.interface
);
1305 if (!intf
|| !intf
->dev
.driver
)
1308 strlcpy(gd
.driver
, intf
->dev
.driver
->name
,
1310 ret
= (copy_to_user(arg
, &gd
, sizeof(gd
)) ? -EFAULT
: 0);
1315 static int proc_connectinfo(struct usb_dev_state
*ps
, void __user
*arg
)
1317 struct usbdevfs_connectinfo ci
;
1319 memset(&ci
, 0, sizeof(ci
));
1320 ci
.devnum
= ps
->dev
->devnum
;
1321 ci
.slow
= ps
->dev
->speed
== USB_SPEED_LOW
;
1323 if (copy_to_user(arg
, &ci
, sizeof(ci
)))
1328 static int proc_resetdevice(struct usb_dev_state
*ps
)
1330 struct usb_host_config
*actconfig
= ps
->dev
->actconfig
;
1331 struct usb_interface
*interface
;
1334 /* Don't allow a device reset if the process has dropped the
1335 * privilege to do such things and any of the interfaces are
1336 * currently claimed.
1338 if (ps
->privileges_dropped
&& actconfig
) {
1339 for (i
= 0; i
< actconfig
->desc
.bNumInterfaces
; ++i
) {
1340 interface
= actconfig
->interface
[i
];
1341 number
= interface
->cur_altsetting
->desc
.bInterfaceNumber
;
1342 if (usb_interface_claimed(interface
) &&
1343 !test_bit(number
, &ps
->ifclaimed
)) {
1344 dev_warn(&ps
->dev
->dev
,
1345 "usbfs: interface %d claimed by %s while '%s' resets device\n",
1346 number
, interface
->dev
.driver
->name
, current
->comm
);
1352 return usb_reset_device(ps
->dev
);
1355 static int proc_setintf(struct usb_dev_state
*ps
, void __user
*arg
)
1357 struct usbdevfs_setinterface setintf
;
1360 if (copy_from_user(&setintf
, arg
, sizeof(setintf
)))
1362 ret
= checkintf(ps
, setintf
.interface
);
1366 destroy_async_on_interface(ps
, setintf
.interface
);
1368 return usb_set_interface(ps
->dev
, setintf
.interface
,
1369 setintf
.altsetting
);
1372 static int proc_setconfig(struct usb_dev_state
*ps
, void __user
*arg
)
1376 struct usb_host_config
*actconfig
;
1378 if (get_user(u
, (int __user
*)arg
))
1381 actconfig
= ps
->dev
->actconfig
;
1383 /* Don't touch the device if any interfaces are claimed.
1384 * It could interfere with other drivers' operations, and if
1385 * an interface is claimed by usbfs it could easily deadlock.
1390 for (i
= 0; i
< actconfig
->desc
.bNumInterfaces
; ++i
) {
1391 if (usb_interface_claimed(actconfig
->interface
[i
])) {
1392 dev_warn(&ps
->dev
->dev
,
1393 "usbfs: interface %d claimed by %s "
1394 "while '%s' sets config #%d\n",
1395 actconfig
->interface
[i
]
1397 ->desc
.bInterfaceNumber
,
1398 actconfig
->interface
[i
]
1407 /* SET_CONFIGURATION is often abused as a "cheap" driver reset,
1408 * so avoid usb_set_configuration()'s kick to sysfs
1411 if (actconfig
&& actconfig
->desc
.bConfigurationValue
== u
)
1412 status
= usb_reset_configuration(ps
->dev
);
1414 status
= usb_set_configuration(ps
->dev
, u
);
1420 static struct usb_memory
*
1421 find_memory_area(struct usb_dev_state
*ps
, const struct usbdevfs_urb
*uurb
)
1423 struct usb_memory
*usbm
= NULL
, *iter
;
1424 unsigned long flags
;
1425 unsigned long uurb_start
= (unsigned long)uurb
->buffer
;
1427 spin_lock_irqsave(&ps
->lock
, flags
);
1428 list_for_each_entry(iter
, &ps
->memory_list
, memlist
) {
1429 if (uurb_start
>= iter
->vm_start
&&
1430 uurb_start
< iter
->vm_start
+ iter
->size
) {
1431 if (uurb
->buffer_length
> iter
->vm_start
+ iter
->size
-
1433 usbm
= ERR_PTR(-EINVAL
);
1436 usbm
->urb_use_count
++;
1441 spin_unlock_irqrestore(&ps
->lock
, flags
);
1445 static int proc_do_submiturb(struct usb_dev_state
*ps
, struct usbdevfs_urb
*uurb
,
1446 struct usbdevfs_iso_packet_desc __user
*iso_frame_desc
,
1449 struct usbdevfs_iso_packet_desc
*isopkt
= NULL
;
1450 struct usb_host_endpoint
*ep
;
1451 struct async
*as
= NULL
;
1452 struct usb_ctrlrequest
*dr
= NULL
;
1453 unsigned int u
, totlen
, isofrmlen
;
1454 int i
, ret
, is_in
, num_sgs
= 0, ifnum
= -1;
1455 int number_of_packets
= 0;
1456 unsigned int stream_id
= 0;
1459 if (uurb
->flags
& ~(USBDEVFS_URB_ISO_ASAP
|
1460 USBDEVFS_URB_SHORT_NOT_OK
|
1461 USBDEVFS_URB_BULK_CONTINUATION
|
1462 USBDEVFS_URB_NO_FSBR
|
1463 USBDEVFS_URB_ZERO_PACKET
|
1464 USBDEVFS_URB_NO_INTERRUPT
))
1466 if ((unsigned int)uurb
->buffer_length
>= USBFS_XFER_MAX
)
1468 if (uurb
->buffer_length
> 0 && !uurb
->buffer
)
1470 if (!(uurb
->type
== USBDEVFS_URB_TYPE_CONTROL
&&
1471 (uurb
->endpoint
& ~USB_ENDPOINT_DIR_MASK
) == 0)) {
1472 ifnum
= findintfep(ps
->dev
, uurb
->endpoint
);
1475 ret
= checkintf(ps
, ifnum
);
1479 ep
= ep_to_host_endpoint(ps
->dev
, uurb
->endpoint
);
1482 is_in
= (uurb
->endpoint
& USB_ENDPOINT_DIR_MASK
) != 0;
1485 switch (uurb
->type
) {
1486 case USBDEVFS_URB_TYPE_CONTROL
:
1487 if (!usb_endpoint_xfer_control(&ep
->desc
))
1489 /* min 8 byte setup packet */
1490 if (uurb
->buffer_length
< 8)
1492 dr
= kmalloc(sizeof(struct usb_ctrlrequest
), GFP_KERNEL
);
1495 if (copy_from_user(dr
, uurb
->buffer
, 8)) {
1499 if (uurb
->buffer_length
< (le16_to_cpup(&dr
->wLength
) + 8)) {
1503 ret
= check_ctrlrecip(ps
, dr
->bRequestType
, dr
->bRequest
,
1504 le16_to_cpup(&dr
->wIndex
));
1507 uurb
->buffer_length
= le16_to_cpup(&dr
->wLength
);
1509 if ((dr
->bRequestType
& USB_DIR_IN
) && uurb
->buffer_length
) {
1511 uurb
->endpoint
|= USB_DIR_IN
;
1514 uurb
->endpoint
&= ~USB_DIR_IN
;
1516 snoop(&ps
->dev
->dev
, "control urb: bRequestType=%02x "
1517 "bRequest=%02x wValue=%04x "
1518 "wIndex=%04x wLength=%04x\n",
1519 dr
->bRequestType
, dr
->bRequest
,
1520 __le16_to_cpup(&dr
->wValue
),
1521 __le16_to_cpup(&dr
->wIndex
),
1522 __le16_to_cpup(&dr
->wLength
));
1523 u
= sizeof(struct usb_ctrlrequest
);
1526 case USBDEVFS_URB_TYPE_BULK
:
1527 switch (usb_endpoint_type(&ep
->desc
)) {
1528 case USB_ENDPOINT_XFER_CONTROL
:
1529 case USB_ENDPOINT_XFER_ISOC
:
1531 case USB_ENDPOINT_XFER_INT
:
1532 /* allow single-shot interrupt transfers */
1533 uurb
->type
= USBDEVFS_URB_TYPE_INTERRUPT
;
1536 num_sgs
= DIV_ROUND_UP(uurb
->buffer_length
, USB_SG_SIZE
);
1537 if (num_sgs
== 1 || num_sgs
> ps
->dev
->bus
->sg_tablesize
)
1540 stream_id
= uurb
->stream_id
;
1543 case USBDEVFS_URB_TYPE_INTERRUPT
:
1544 if (!usb_endpoint_xfer_int(&ep
->desc
))
1549 case USBDEVFS_URB_TYPE_ISO
:
1550 /* arbitrary limit */
1551 if (uurb
->number_of_packets
< 1 ||
1552 uurb
->number_of_packets
> 128)
1554 if (!usb_endpoint_xfer_isoc(&ep
->desc
))
1556 number_of_packets
= uurb
->number_of_packets
;
1557 isofrmlen
= sizeof(struct usbdevfs_iso_packet_desc
) *
1559 isopkt
= memdup_user(iso_frame_desc
, isofrmlen
);
1560 if (IS_ERR(isopkt
)) {
1561 ret
= PTR_ERR(isopkt
);
1565 for (totlen
= u
= 0; u
< number_of_packets
; u
++) {
1567 * arbitrary limit need for USB 3.0
1568 * bMaxBurst (0~15 allowed, 1~16 packets)
1569 * bmAttributes (bit 1:0, mult 0~2, 1~3 packets)
1570 * sizemax: 1024 * 16 * 3 = 49152
1572 if (isopkt
[u
].length
> 49152) {
1576 totlen
+= isopkt
[u
].length
;
1578 u
*= sizeof(struct usb_iso_packet_descriptor
);
1579 uurb
->buffer_length
= totlen
;
1586 if (uurb
->buffer_length
> 0 &&
1587 !access_ok(is_in
? VERIFY_WRITE
: VERIFY_READ
,
1588 uurb
->buffer
, uurb
->buffer_length
)) {
1592 as
= alloc_async(number_of_packets
);
1598 as
->usbm
= find_memory_area(ps
, uurb
);
1599 if (IS_ERR(as
->usbm
)) {
1600 ret
= PTR_ERR(as
->usbm
);
1605 /* do not use SG buffers when memory mapped segments
1611 u
+= sizeof(struct async
) + sizeof(struct urb
) + uurb
->buffer_length
+
1612 num_sgs
* sizeof(struct scatterlist
);
1613 ret
= usbfs_increase_memory_usage(u
);
1619 as
->urb
->sg
= kmalloc(num_sgs
* sizeof(struct scatterlist
),
1625 as
->urb
->num_sgs
= num_sgs
;
1626 sg_init_table(as
->urb
->sg
, as
->urb
->num_sgs
);
1628 totlen
= uurb
->buffer_length
;
1629 for (i
= 0; i
< as
->urb
->num_sgs
; i
++) {
1630 u
= (totlen
> USB_SG_SIZE
) ? USB_SG_SIZE
: totlen
;
1631 buf
= kmalloc(u
, GFP_KERNEL
);
1636 sg_set_buf(&as
->urb
->sg
[i
], buf
, u
);
1639 if (copy_from_user(buf
, uurb
->buffer
, u
)) {
1647 } else if (uurb
->buffer_length
> 0) {
1649 unsigned long uurb_start
= (unsigned long)uurb
->buffer
;
1651 as
->urb
->transfer_buffer
= as
->usbm
->mem
+
1652 (uurb_start
- as
->usbm
->vm_start
);
1654 as
->urb
->transfer_buffer
= kmalloc(uurb
->buffer_length
,
1656 if (!as
->urb
->transfer_buffer
) {
1661 if (copy_from_user(as
->urb
->transfer_buffer
,
1663 uurb
->buffer_length
)) {
1667 } else if (uurb
->type
== USBDEVFS_URB_TYPE_ISO
) {
1669 * Isochronous input data may end up being
1670 * discontiguous if some of the packets are
1671 * short. Clear the buffer so that the gaps
1672 * don't leak kernel data to userspace.
1674 memset(as
->urb
->transfer_buffer
, 0,
1675 uurb
->buffer_length
);
1679 as
->urb
->dev
= ps
->dev
;
1680 as
->urb
->pipe
= (uurb
->type
<< 30) |
1681 __create_pipe(ps
->dev
, uurb
->endpoint
& 0xf) |
1682 (uurb
->endpoint
& USB_DIR_IN
);
1684 /* This tedious sequence is necessary because the URB_* flags
1685 * are internal to the kernel and subject to change, whereas
1686 * the USBDEVFS_URB_* flags are a user API and must not be changed.
1688 u
= (is_in
? URB_DIR_IN
: URB_DIR_OUT
);
1689 if (uurb
->flags
& USBDEVFS_URB_ISO_ASAP
)
1691 if (uurb
->flags
& USBDEVFS_URB_SHORT_NOT_OK
&& is_in
)
1692 u
|= URB_SHORT_NOT_OK
;
1693 if (uurb
->flags
& USBDEVFS_URB_NO_FSBR
)
1695 if (uurb
->flags
& USBDEVFS_URB_ZERO_PACKET
)
1696 u
|= URB_ZERO_PACKET
;
1697 if (uurb
->flags
& USBDEVFS_URB_NO_INTERRUPT
)
1698 u
|= URB_NO_INTERRUPT
;
1699 as
->urb
->transfer_flags
= u
;
1701 as
->urb
->transfer_buffer_length
= uurb
->buffer_length
;
1702 as
->urb
->setup_packet
= (unsigned char *)dr
;
1704 as
->urb
->start_frame
= uurb
->start_frame
;
1705 as
->urb
->number_of_packets
= number_of_packets
;
1706 as
->urb
->stream_id
= stream_id
;
1708 if (ep
->desc
.bInterval
) {
1709 if (uurb
->type
== USBDEVFS_URB_TYPE_ISO
||
1710 ps
->dev
->speed
== USB_SPEED_HIGH
||
1711 ps
->dev
->speed
>= USB_SPEED_SUPER
)
1712 as
->urb
->interval
= 1 <<
1713 min(15, ep
->desc
.bInterval
- 1);
1715 as
->urb
->interval
= ep
->desc
.bInterval
;
1718 as
->urb
->context
= as
;
1719 as
->urb
->complete
= async_completed
;
1720 for (totlen
= u
= 0; u
< number_of_packets
; u
++) {
1721 as
->urb
->iso_frame_desc
[u
].offset
= totlen
;
1722 as
->urb
->iso_frame_desc
[u
].length
= isopkt
[u
].length
;
1723 totlen
+= isopkt
[u
].length
;
1730 unsigned long uurb_start
= (unsigned long)uurb
->buffer
;
1732 as
->urb
->transfer_flags
|= URB_NO_TRANSFER_DMA_MAP
;
1733 as
->urb
->transfer_dma
= as
->usbm
->dma_handle
+
1734 (uurb_start
- as
->usbm
->vm_start
);
1735 } else if (is_in
&& uurb
->buffer_length
> 0)
1736 as
->userbuffer
= uurb
->buffer
;
1737 as
->signr
= uurb
->signr
;
1739 as
->pid
= get_pid(task_pid(current
));
1740 as
->cred
= get_current_cred();
1741 security_task_getsecid(current
, &as
->secid
);
1742 snoop_urb(ps
->dev
, as
->userurb
, as
->urb
->pipe
,
1743 as
->urb
->transfer_buffer_length
, 0, SUBMIT
,
1746 snoop_urb_data(as
->urb
, as
->urb
->transfer_buffer_length
);
1748 async_newpending(as
);
1750 if (usb_endpoint_xfer_bulk(&ep
->desc
)) {
1751 spin_lock_irq(&ps
->lock
);
1753 /* Not exactly the endpoint address; the direction bit is
1754 * shifted to the 0x10 position so that the value will be
1757 as
->bulk_addr
= usb_endpoint_num(&ep
->desc
) |
1758 ((ep
->desc
.bEndpointAddress
& USB_ENDPOINT_DIR_MASK
)
1761 /* If this bulk URB is the start of a new transfer, re-enable
1762 * the endpoint. Otherwise mark it as a continuation URB.
1764 if (uurb
->flags
& USBDEVFS_URB_BULK_CONTINUATION
)
1765 as
->bulk_status
= AS_CONTINUATION
;
1767 ps
->disabled_bulk_eps
&= ~(1 << as
->bulk_addr
);
1769 /* Don't accept continuation URBs if the endpoint is
1770 * disabled because of an earlier error.
1772 if (ps
->disabled_bulk_eps
& (1 << as
->bulk_addr
))
1775 ret
= usb_submit_urb(as
->urb
, GFP_ATOMIC
);
1776 spin_unlock_irq(&ps
->lock
);
1778 ret
= usb_submit_urb(as
->urb
, GFP_KERNEL
);
1782 dev_printk(KERN_DEBUG
, &ps
->dev
->dev
,
1783 "usbfs: usb_submit_urb returned %d\n", ret
);
1784 snoop_urb(ps
->dev
, as
->userurb
, as
->urb
->pipe
,
1785 0, ret
, COMPLETE
, NULL
, 0);
1786 async_removepending(as
);
1793 dec_usb_memory_use_count(as
->usbm
, &as
->usbm
->urb_use_count
);
1801 static int proc_submiturb(struct usb_dev_state
*ps
, void __user
*arg
)
1803 struct usbdevfs_urb uurb
;
1805 if (copy_from_user(&uurb
, arg
, sizeof(uurb
)))
1808 return proc_do_submiturb(ps
, &uurb
,
1809 (((struct usbdevfs_urb __user
*)arg
)->iso_frame_desc
),
1813 static int proc_unlinkurb(struct usb_dev_state
*ps
, void __user
*arg
)
1817 unsigned long flags
;
1819 spin_lock_irqsave(&ps
->lock
, flags
);
1820 as
= async_getpending(ps
, arg
);
1822 spin_unlock_irqrestore(&ps
->lock
, flags
);
1828 spin_unlock_irqrestore(&ps
->lock
, flags
);
1836 static int processcompl(struct async
*as
, void __user
* __user
*arg
)
1838 struct urb
*urb
= as
->urb
;
1839 struct usbdevfs_urb __user
*userurb
= as
->userurb
;
1840 void __user
*addr
= as
->userurb
;
1843 if (as
->userbuffer
&& urb
->actual_length
) {
1844 if (copy_urb_data_to_user(as
->userbuffer
, urb
))
1847 if (put_user(as
->status
, &userurb
->status
))
1849 if (put_user(urb
->actual_length
, &userurb
->actual_length
))
1851 if (put_user(urb
->error_count
, &userurb
->error_count
))
1854 if (usb_endpoint_xfer_isoc(&urb
->ep
->desc
)) {
1855 for (i
= 0; i
< urb
->number_of_packets
; i
++) {
1856 if (put_user(urb
->iso_frame_desc
[i
].actual_length
,
1857 &userurb
->iso_frame_desc
[i
].actual_length
))
1859 if (put_user(urb
->iso_frame_desc
[i
].status
,
1860 &userurb
->iso_frame_desc
[i
].status
))
1865 if (put_user(addr
, (void __user
* __user
*)arg
))
1873 static struct async
*reap_as(struct usb_dev_state
*ps
)
1875 DECLARE_WAITQUEUE(wait
, current
);
1876 struct async
*as
= NULL
;
1877 struct usb_device
*dev
= ps
->dev
;
1879 add_wait_queue(&ps
->wait
, &wait
);
1881 __set_current_state(TASK_INTERRUPTIBLE
);
1882 as
= async_getcompleted(ps
);
1883 if (as
|| !connected(ps
))
1885 if (signal_pending(current
))
1887 usb_unlock_device(dev
);
1889 usb_lock_device(dev
);
1891 remove_wait_queue(&ps
->wait
, &wait
);
1892 set_current_state(TASK_RUNNING
);
1896 static int proc_reapurb(struct usb_dev_state
*ps
, void __user
*arg
)
1898 struct async
*as
= reap_as(ps
);
1903 snoop(&ps
->dev
->dev
, "reap %pK\n", as
->userurb
);
1904 retval
= processcompl(as
, (void __user
* __user
*)arg
);
1908 if (signal_pending(current
))
1913 static int proc_reapurbnonblock(struct usb_dev_state
*ps
, void __user
*arg
)
1918 as
= async_getcompleted(ps
);
1920 snoop(&ps
->dev
->dev
, "reap %pK\n", as
->userurb
);
1921 retval
= processcompl(as
, (void __user
* __user
*)arg
);
1924 retval
= (connected(ps
) ? -EAGAIN
: -ENODEV
);
1929 #ifdef CONFIG_COMPAT
1930 static int proc_control_compat(struct usb_dev_state
*ps
,
1931 struct usbdevfs_ctrltransfer32 __user
*p32
)
1933 struct usbdevfs_ctrltransfer __user
*p
;
1935 p
= compat_alloc_user_space(sizeof(*p
));
1936 if (copy_in_user(p
, p32
, (sizeof(*p32
) - sizeof(compat_caddr_t
))) ||
1937 get_user(udata
, &p32
->data
) ||
1938 put_user(compat_ptr(udata
), &p
->data
))
1940 return proc_control(ps
, p
);
1943 static int proc_bulk_compat(struct usb_dev_state
*ps
,
1944 struct usbdevfs_bulktransfer32 __user
*p32
)
1946 struct usbdevfs_bulktransfer __user
*p
;
1948 compat_caddr_t addr
;
1950 p
= compat_alloc_user_space(sizeof(*p
));
1952 if (get_user(n
, &p32
->ep
) || put_user(n
, &p
->ep
) ||
1953 get_user(n
, &p32
->len
) || put_user(n
, &p
->len
) ||
1954 get_user(n
, &p32
->timeout
) || put_user(n
, &p
->timeout
) ||
1955 get_user(addr
, &p32
->data
) || put_user(compat_ptr(addr
), &p
->data
))
1958 return proc_bulk(ps
, p
);
1960 static int proc_disconnectsignal_compat(struct usb_dev_state
*ps
, void __user
*arg
)
1962 struct usbdevfs_disconnectsignal32 ds
;
1964 if (copy_from_user(&ds
, arg
, sizeof(ds
)))
1966 ps
->discsignr
= ds
.signr
;
1967 ps
->disccontext
= compat_ptr(ds
.context
);
1971 static int get_urb32(struct usbdevfs_urb
*kurb
,
1972 struct usbdevfs_urb32 __user
*uurb
)
1974 struct usbdevfs_urb32 urb32
;
1975 if (copy_from_user(&urb32
, uurb
, sizeof(*uurb
)))
1977 kurb
->type
= urb32
.type
;
1978 kurb
->endpoint
= urb32
.endpoint
;
1979 kurb
->status
= urb32
.status
;
1980 kurb
->flags
= urb32
.flags
;
1981 kurb
->buffer
= compat_ptr(urb32
.buffer
);
1982 kurb
->buffer_length
= urb32
.buffer_length
;
1983 kurb
->actual_length
= urb32
.actual_length
;
1984 kurb
->start_frame
= urb32
.start_frame
;
1985 kurb
->number_of_packets
= urb32
.number_of_packets
;
1986 kurb
->error_count
= urb32
.error_count
;
1987 kurb
->signr
= urb32
.signr
;
1988 kurb
->usercontext
= compat_ptr(urb32
.usercontext
);
1992 static int proc_submiturb_compat(struct usb_dev_state
*ps
, void __user
*arg
)
1994 struct usbdevfs_urb uurb
;
1996 if (get_urb32(&uurb
, (struct usbdevfs_urb32 __user
*)arg
))
1999 return proc_do_submiturb(ps
, &uurb
,
2000 ((struct usbdevfs_urb32 __user
*)arg
)->iso_frame_desc
,
2004 static int processcompl_compat(struct async
*as
, void __user
* __user
*arg
)
2006 struct urb
*urb
= as
->urb
;
2007 struct usbdevfs_urb32 __user
*userurb
= as
->userurb
;
2008 void __user
*addr
= as
->userurb
;
2011 if (as
->userbuffer
&& urb
->actual_length
) {
2012 if (copy_urb_data_to_user(as
->userbuffer
, urb
))
2015 if (put_user(as
->status
, &userurb
->status
))
2017 if (put_user(urb
->actual_length
, &userurb
->actual_length
))
2019 if (put_user(urb
->error_count
, &userurb
->error_count
))
2022 if (usb_endpoint_xfer_isoc(&urb
->ep
->desc
)) {
2023 for (i
= 0; i
< urb
->number_of_packets
; i
++) {
2024 if (put_user(urb
->iso_frame_desc
[i
].actual_length
,
2025 &userurb
->iso_frame_desc
[i
].actual_length
))
2027 if (put_user(urb
->iso_frame_desc
[i
].status
,
2028 &userurb
->iso_frame_desc
[i
].status
))
2033 if (put_user(ptr_to_compat(addr
), (u32 __user
*)arg
))
2038 static int proc_reapurb_compat(struct usb_dev_state
*ps
, void __user
*arg
)
2040 struct async
*as
= reap_as(ps
);
2045 snoop(&ps
->dev
->dev
, "reap %pK\n", as
->userurb
);
2046 retval
= processcompl_compat(as
, (void __user
* __user
*)arg
);
2050 if (signal_pending(current
))
2055 static int proc_reapurbnonblock_compat(struct usb_dev_state
*ps
, void __user
*arg
)
2060 as
= async_getcompleted(ps
);
2062 snoop(&ps
->dev
->dev
, "reap %pK\n", as
->userurb
);
2063 retval
= processcompl_compat(as
, (void __user
* __user
*)arg
);
2066 retval
= (connected(ps
) ? -EAGAIN
: -ENODEV
);
2074 static int proc_disconnectsignal(struct usb_dev_state
*ps
, void __user
*arg
)
2076 struct usbdevfs_disconnectsignal ds
;
2078 if (copy_from_user(&ds
, arg
, sizeof(ds
)))
2080 ps
->discsignr
= ds
.signr
;
2081 ps
->disccontext
= ds
.context
;
2085 static int proc_claiminterface(struct usb_dev_state
*ps
, void __user
*arg
)
2089 if (get_user(ifnum
, (unsigned int __user
*)arg
))
2091 return claimintf(ps
, ifnum
);
2094 static int proc_releaseinterface(struct usb_dev_state
*ps
, void __user
*arg
)
2099 if (get_user(ifnum
, (unsigned int __user
*)arg
))
2101 ret
= releaseintf(ps
, ifnum
);
2104 destroy_async_on_interface(ps
, ifnum
);
2108 static int proc_ioctl(struct usb_dev_state
*ps
, struct usbdevfs_ioctl
*ctl
)
2113 struct usb_interface
*intf
= NULL
;
2114 struct usb_driver
*driver
= NULL
;
2116 if (ps
->privileges_dropped
)
2120 size
= _IOC_SIZE(ctl
->ioctl_code
);
2122 buf
= kmalloc(size
, GFP_KERNEL
);
2125 if ((_IOC_DIR(ctl
->ioctl_code
) & _IOC_WRITE
)) {
2126 if (copy_from_user(buf
, ctl
->data
, size
)) {
2131 memset(buf
, 0, size
);
2135 if (!connected(ps
)) {
2140 if (ps
->dev
->state
!= USB_STATE_CONFIGURED
)
2141 retval
= -EHOSTUNREACH
;
2142 else if (!(intf
= usb_ifnum_to_if(ps
->dev
, ctl
->ifno
)))
2144 else switch (ctl
->ioctl_code
) {
2146 /* disconnect kernel driver from interface */
2147 case USBDEVFS_DISCONNECT
:
2148 if (intf
->dev
.driver
) {
2149 driver
= to_usb_driver(intf
->dev
.driver
);
2150 dev_dbg(&intf
->dev
, "disconnect by usbfs\n");
2151 usb_driver_release_interface(driver
, intf
);
2156 /* let kernel drivers try to (re)bind to the interface */
2157 case USBDEVFS_CONNECT
:
2158 if (!intf
->dev
.driver
)
2159 retval
= device_attach(&intf
->dev
);
2164 /* talk directly to the interface's driver */
2166 if (intf
->dev
.driver
)
2167 driver
= to_usb_driver(intf
->dev
.driver
);
2168 if (driver
== NULL
|| driver
->unlocked_ioctl
== NULL
) {
2171 retval
= driver
->unlocked_ioctl(intf
, ctl
->ioctl_code
, buf
);
2172 if (retval
== -ENOIOCTLCMD
)
2177 /* cleanup and return */
2179 && (_IOC_DIR(ctl
->ioctl_code
) & _IOC_READ
) != 0
2181 && copy_to_user(ctl
->data
, buf
, size
) != 0)
2188 static int proc_ioctl_default(struct usb_dev_state
*ps
, void __user
*arg
)
2190 struct usbdevfs_ioctl ctrl
;
2192 if (copy_from_user(&ctrl
, arg
, sizeof(ctrl
)))
2194 return proc_ioctl(ps
, &ctrl
);
2197 #ifdef CONFIG_COMPAT
2198 static int proc_ioctl_compat(struct usb_dev_state
*ps
, compat_uptr_t arg
)
2200 struct usbdevfs_ioctl32 ioc32
;
2201 struct usbdevfs_ioctl ctrl
;
2203 if (copy_from_user(&ioc32
, compat_ptr(arg
), sizeof(ioc32
)))
2205 ctrl
.ifno
= ioc32
.ifno
;
2206 ctrl
.ioctl_code
= ioc32
.ioctl_code
;
2207 ctrl
.data
= compat_ptr(ioc32
.data
);
2208 return proc_ioctl(ps
, &ctrl
);
2212 static int proc_claim_port(struct usb_dev_state
*ps
, void __user
*arg
)
2217 if (get_user(portnum
, (unsigned __user
*) arg
))
2219 rc
= usb_hub_claim_port(ps
->dev
, portnum
, ps
);
2221 snoop(&ps
->dev
->dev
, "port %d claimed by process %d: %s\n",
2222 portnum
, task_pid_nr(current
), current
->comm
);
2226 static int proc_release_port(struct usb_dev_state
*ps
, void __user
*arg
)
2230 if (get_user(portnum
, (unsigned __user
*) arg
))
2232 return usb_hub_release_port(ps
->dev
, portnum
, ps
);
2235 static int proc_get_capabilities(struct usb_dev_state
*ps
, void __user
*arg
)
2239 caps
= USBDEVFS_CAP_ZERO_PACKET
| USBDEVFS_CAP_NO_PACKET_SIZE_LIM
|
2240 USBDEVFS_CAP_REAP_AFTER_DISCONNECT
| USBDEVFS_CAP_MMAP
|
2241 USBDEVFS_CAP_DROP_PRIVILEGES
;
2242 if (!ps
->dev
->bus
->no_stop_on_short
)
2243 caps
|= USBDEVFS_CAP_BULK_CONTINUATION
;
2244 if (ps
->dev
->bus
->sg_tablesize
)
2245 caps
|= USBDEVFS_CAP_BULK_SCATTER_GATHER
;
2247 if (put_user(caps
, (__u32 __user
*)arg
))
2253 static int proc_disconnect_claim(struct usb_dev_state
*ps
, void __user
*arg
)
2255 struct usbdevfs_disconnect_claim dc
;
2256 struct usb_interface
*intf
;
2258 if (copy_from_user(&dc
, arg
, sizeof(dc
)))
2261 intf
= usb_ifnum_to_if(ps
->dev
, dc
.interface
);
2265 if (intf
->dev
.driver
) {
2266 struct usb_driver
*driver
= to_usb_driver(intf
->dev
.driver
);
2268 if (ps
->privileges_dropped
)
2271 if ((dc
.flags
& USBDEVFS_DISCONNECT_CLAIM_IF_DRIVER
) &&
2272 strncmp(dc
.driver
, intf
->dev
.driver
->name
,
2273 sizeof(dc
.driver
)) != 0)
2276 if ((dc
.flags
& USBDEVFS_DISCONNECT_CLAIM_EXCEPT_DRIVER
) &&
2277 strncmp(dc
.driver
, intf
->dev
.driver
->name
,
2278 sizeof(dc
.driver
)) == 0)
2281 dev_dbg(&intf
->dev
, "disconnect by usbfs\n");
2282 usb_driver_release_interface(driver
, intf
);
2285 return claimintf(ps
, dc
.interface
);
2288 static int proc_alloc_streams(struct usb_dev_state
*ps
, void __user
*arg
)
2290 unsigned num_streams
, num_eps
;
2291 struct usb_host_endpoint
**eps
;
2292 struct usb_interface
*intf
;
2295 r
= parse_usbdevfs_streams(ps
, arg
, &num_streams
, &num_eps
,
2300 destroy_async_on_interface(ps
,
2301 intf
->altsetting
[0].desc
.bInterfaceNumber
);
2303 r
= usb_alloc_streams(intf
, eps
, num_eps
, num_streams
, GFP_KERNEL
);
2308 static int proc_free_streams(struct usb_dev_state
*ps
, void __user
*arg
)
2311 struct usb_host_endpoint
**eps
;
2312 struct usb_interface
*intf
;
2315 r
= parse_usbdevfs_streams(ps
, arg
, NULL
, &num_eps
, &eps
, &intf
);
2319 destroy_async_on_interface(ps
,
2320 intf
->altsetting
[0].desc
.bInterfaceNumber
);
2322 r
= usb_free_streams(intf
, eps
, num_eps
, GFP_KERNEL
);
2327 static int proc_drop_privileges(struct usb_dev_state
*ps
, void __user
*arg
)
2331 if (copy_from_user(&data
, arg
, sizeof(data
)))
2334 /* This is a one way operation. Once privileges are
2335 * dropped, you cannot regain them. You may however reissue
2336 * this ioctl to shrink the allowed interfaces mask.
2338 ps
->interface_allowed_mask
&= data
;
2339 ps
->privileges_dropped
= true;
2345 * NOTE: All requests here that have interface numbers as parameters
2346 * are assuming that somehow the configuration has been prevented from
2347 * changing. But there's no mechanism to ensure that...
2349 static long usbdev_do_ioctl(struct file
*file
, unsigned int cmd
,
2352 struct usb_dev_state
*ps
= file
->private_data
;
2353 struct inode
*inode
= file_inode(file
);
2354 struct usb_device
*dev
= ps
->dev
;
2357 if (!(file
->f_mode
& FMODE_WRITE
))
2360 usb_lock_device(dev
);
2362 /* Reap operations are allowed even after disconnection */
2364 case USBDEVFS_REAPURB
:
2365 snoop(&dev
->dev
, "%s: REAPURB\n", __func__
);
2366 ret
= proc_reapurb(ps
, p
);
2369 case USBDEVFS_REAPURBNDELAY
:
2370 snoop(&dev
->dev
, "%s: REAPURBNDELAY\n", __func__
);
2371 ret
= proc_reapurbnonblock(ps
, p
);
2374 #ifdef CONFIG_COMPAT
2375 case USBDEVFS_REAPURB32
:
2376 snoop(&dev
->dev
, "%s: REAPURB32\n", __func__
);
2377 ret
= proc_reapurb_compat(ps
, p
);
2380 case USBDEVFS_REAPURBNDELAY32
:
2381 snoop(&dev
->dev
, "%s: REAPURBNDELAY32\n", __func__
);
2382 ret
= proc_reapurbnonblock_compat(ps
, p
);
2387 if (!connected(ps
)) {
2388 usb_unlock_device(dev
);
2393 case USBDEVFS_CONTROL
:
2394 snoop(&dev
->dev
, "%s: CONTROL\n", __func__
);
2395 ret
= proc_control(ps
, p
);
2397 inode
->i_mtime
= current_time(inode
);
2401 snoop(&dev
->dev
, "%s: BULK\n", __func__
);
2402 ret
= proc_bulk(ps
, p
);
2404 inode
->i_mtime
= current_time(inode
);
2407 case USBDEVFS_RESETEP
:
2408 snoop(&dev
->dev
, "%s: RESETEP\n", __func__
);
2409 ret
= proc_resetep(ps
, p
);
2411 inode
->i_mtime
= current_time(inode
);
2414 case USBDEVFS_RESET
:
2415 snoop(&dev
->dev
, "%s: RESET\n", __func__
);
2416 ret
= proc_resetdevice(ps
);
2419 case USBDEVFS_CLEAR_HALT
:
2420 snoop(&dev
->dev
, "%s: CLEAR_HALT\n", __func__
);
2421 ret
= proc_clearhalt(ps
, p
);
2423 inode
->i_mtime
= current_time(inode
);
2426 case USBDEVFS_GETDRIVER
:
2427 snoop(&dev
->dev
, "%s: GETDRIVER\n", __func__
);
2428 ret
= proc_getdriver(ps
, p
);
2431 case USBDEVFS_CONNECTINFO
:
2432 snoop(&dev
->dev
, "%s: CONNECTINFO\n", __func__
);
2433 ret
= proc_connectinfo(ps
, p
);
2436 case USBDEVFS_SETINTERFACE
:
2437 snoop(&dev
->dev
, "%s: SETINTERFACE\n", __func__
);
2438 ret
= proc_setintf(ps
, p
);
2441 case USBDEVFS_SETCONFIGURATION
:
2442 snoop(&dev
->dev
, "%s: SETCONFIGURATION\n", __func__
);
2443 ret
= proc_setconfig(ps
, p
);
2446 case USBDEVFS_SUBMITURB
:
2447 snoop(&dev
->dev
, "%s: SUBMITURB\n", __func__
);
2448 ret
= proc_submiturb(ps
, p
);
2450 inode
->i_mtime
= current_time(inode
);
2453 #ifdef CONFIG_COMPAT
2454 case USBDEVFS_CONTROL32
:
2455 snoop(&dev
->dev
, "%s: CONTROL32\n", __func__
);
2456 ret
= proc_control_compat(ps
, p
);
2458 inode
->i_mtime
= current_time(inode
);
2461 case USBDEVFS_BULK32
:
2462 snoop(&dev
->dev
, "%s: BULK32\n", __func__
);
2463 ret
= proc_bulk_compat(ps
, p
);
2465 inode
->i_mtime
= current_time(inode
);
2468 case USBDEVFS_DISCSIGNAL32
:
2469 snoop(&dev
->dev
, "%s: DISCSIGNAL32\n", __func__
);
2470 ret
= proc_disconnectsignal_compat(ps
, p
);
2473 case USBDEVFS_SUBMITURB32
:
2474 snoop(&dev
->dev
, "%s: SUBMITURB32\n", __func__
);
2475 ret
= proc_submiturb_compat(ps
, p
);
2477 inode
->i_mtime
= current_time(inode
);
2480 case USBDEVFS_IOCTL32
:
2481 snoop(&dev
->dev
, "%s: IOCTL32\n", __func__
);
2482 ret
= proc_ioctl_compat(ps
, ptr_to_compat(p
));
2486 case USBDEVFS_DISCARDURB
:
2487 snoop(&dev
->dev
, "%s: DISCARDURB %pK\n", __func__
, p
);
2488 ret
= proc_unlinkurb(ps
, p
);
2491 case USBDEVFS_DISCSIGNAL
:
2492 snoop(&dev
->dev
, "%s: DISCSIGNAL\n", __func__
);
2493 ret
= proc_disconnectsignal(ps
, p
);
2496 case USBDEVFS_CLAIMINTERFACE
:
2497 snoop(&dev
->dev
, "%s: CLAIMINTERFACE\n", __func__
);
2498 ret
= proc_claiminterface(ps
, p
);
2501 case USBDEVFS_RELEASEINTERFACE
:
2502 snoop(&dev
->dev
, "%s: RELEASEINTERFACE\n", __func__
);
2503 ret
= proc_releaseinterface(ps
, p
);
2506 case USBDEVFS_IOCTL
:
2507 snoop(&dev
->dev
, "%s: IOCTL\n", __func__
);
2508 ret
= proc_ioctl_default(ps
, p
);
2511 case USBDEVFS_CLAIM_PORT
:
2512 snoop(&dev
->dev
, "%s: CLAIM_PORT\n", __func__
);
2513 ret
= proc_claim_port(ps
, p
);
2516 case USBDEVFS_RELEASE_PORT
:
2517 snoop(&dev
->dev
, "%s: RELEASE_PORT\n", __func__
);
2518 ret
= proc_release_port(ps
, p
);
2520 case USBDEVFS_GET_CAPABILITIES
:
2521 ret
= proc_get_capabilities(ps
, p
);
2523 case USBDEVFS_DISCONNECT_CLAIM
:
2524 ret
= proc_disconnect_claim(ps
, p
);
2526 case USBDEVFS_ALLOC_STREAMS
:
2527 ret
= proc_alloc_streams(ps
, p
);
2529 case USBDEVFS_FREE_STREAMS
:
2530 ret
= proc_free_streams(ps
, p
);
2532 case USBDEVFS_DROP_PRIVILEGES
:
2533 ret
= proc_drop_privileges(ps
, p
);
2535 case USBDEVFS_GET_SPEED
:
2536 ret
= ps
->dev
->speed
;
2541 usb_unlock_device(dev
);
2543 inode
->i_atime
= current_time(inode
);
2547 static long usbdev_ioctl(struct file
*file
, unsigned int cmd
,
2552 ret
= usbdev_do_ioctl(file
, cmd
, (void __user
*)arg
);
2557 #ifdef CONFIG_COMPAT
2558 static long usbdev_compat_ioctl(struct file
*file
, unsigned int cmd
,
2563 ret
= usbdev_do_ioctl(file
, cmd
, compat_ptr(arg
));
2569 /* No kernel lock - fine */
2570 static unsigned int usbdev_poll(struct file
*file
,
2571 struct poll_table_struct
*wait
)
2573 struct usb_dev_state
*ps
= file
->private_data
;
2574 unsigned int mask
= 0;
2576 poll_wait(file
, &ps
->wait
, wait
);
2577 if (file
->f_mode
& FMODE_WRITE
&& !list_empty(&ps
->async_completed
))
2578 mask
|= POLLOUT
| POLLWRNORM
;
2581 if (list_empty(&ps
->list
))
2586 const struct file_operations usbdev_file_operations
= {
2587 .owner
= THIS_MODULE
,
2588 .llseek
= no_seek_end_llseek
,
2589 .read
= usbdev_read
,
2590 .poll
= usbdev_poll
,
2591 .unlocked_ioctl
= usbdev_ioctl
,
2592 #ifdef CONFIG_COMPAT
2593 .compat_ioctl
= usbdev_compat_ioctl
,
2595 .mmap
= usbdev_mmap
,
2596 .open
= usbdev_open
,
2597 .release
= usbdev_release
,
2600 static void usbdev_remove(struct usb_device
*udev
)
2602 struct usb_dev_state
*ps
;
2603 struct siginfo sinfo
;
2605 while (!list_empty(&udev
->filelist
)) {
2606 ps
= list_entry(udev
->filelist
.next
, struct usb_dev_state
, list
);
2607 destroy_all_async(ps
);
2608 wake_up_all(&ps
->wait
);
2609 list_del_init(&ps
->list
);
2610 if (ps
->discsignr
) {
2611 memset(&sinfo
, 0, sizeof(sinfo
));
2612 sinfo
.si_signo
= ps
->discsignr
;
2613 sinfo
.si_errno
= EPIPE
;
2614 sinfo
.si_code
= SI_ASYNCIO
;
2615 sinfo
.si_addr
= ps
->disccontext
;
2616 kill_pid_info_as_cred(ps
->discsignr
, &sinfo
,
2617 ps
->disc_pid
, ps
->cred
, ps
->secid
);
2622 static int usbdev_notify(struct notifier_block
*self
,
2623 unsigned long action
, void *dev
)
2626 case USB_DEVICE_ADD
:
2628 case USB_DEVICE_REMOVE
:
2635 static struct notifier_block usbdev_nb
= {
2636 .notifier_call
= usbdev_notify
,
2639 static struct cdev usb_device_cdev
;
2641 int __init
usb_devio_init(void)
2645 retval
= register_chrdev_region(USB_DEVICE_DEV
, USB_DEVICE_MAX
,
2648 printk(KERN_ERR
"Unable to register minors for usb_device\n");
2651 cdev_init(&usb_device_cdev
, &usbdev_file_operations
);
2652 retval
= cdev_add(&usb_device_cdev
, USB_DEVICE_DEV
, USB_DEVICE_MAX
);
2654 printk(KERN_ERR
"Unable to get usb_device major %d\n",
2658 usb_register_notify(&usbdev_nb
);
2663 unregister_chrdev_region(USB_DEVICE_DEV
, USB_DEVICE_MAX
);
2667 void usb_devio_cleanup(void)
2669 usb_unregister_notify(&usbdev_nb
);
2670 cdev_del(&usb_device_cdev
);
2671 unregister_chrdev_region(USB_DEVICE_DEV
, USB_DEVICE_MAX
);