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 static atomic64_t usbfs_memory_usage
; /* Total memory currently allocated */
145 /* Check whether it's okay to allocate more memory for a transfer */
146 static int usbfs_increase_memory_usage(u64 amount
)
150 lim
= ACCESS_ONCE(usbfs_memory_mb
);
153 atomic64_add(amount
, &usbfs_memory_usage
);
155 if (lim
> 0 && atomic64_read(&usbfs_memory_usage
) > lim
) {
156 atomic64_sub(amount
, &usbfs_memory_usage
);
163 /* Memory for a transfer is being deallocated */
164 static void usbfs_decrease_memory_usage(u64 amount
)
166 atomic64_sub(amount
, &usbfs_memory_usage
);
169 static int connected(struct usb_dev_state
*ps
)
171 return (!list_empty(&ps
->list
) &&
172 ps
->dev
->state
!= USB_STATE_NOTATTACHED
);
175 static void dec_usb_memory_use_count(struct usb_memory
*usbm
, int *count
)
177 struct usb_dev_state
*ps
= usbm
->ps
;
180 spin_lock_irqsave(&ps
->lock
, flags
);
182 if (usbm
->urb_use_count
== 0 && usbm
->vma_use_count
== 0) {
183 list_del(&usbm
->memlist
);
184 spin_unlock_irqrestore(&ps
->lock
, flags
);
186 usb_free_coherent(ps
->dev
, usbm
->size
, usbm
->mem
,
188 usbfs_decrease_memory_usage(
189 usbm
->size
+ sizeof(struct usb_memory
));
192 spin_unlock_irqrestore(&ps
->lock
, flags
);
196 static void usbdev_vm_open(struct vm_area_struct
*vma
)
198 struct usb_memory
*usbm
= vma
->vm_private_data
;
201 spin_lock_irqsave(&usbm
->ps
->lock
, flags
);
202 ++usbm
->vma_use_count
;
203 spin_unlock_irqrestore(&usbm
->ps
->lock
, flags
);
206 static void usbdev_vm_close(struct vm_area_struct
*vma
)
208 struct usb_memory
*usbm
= vma
->vm_private_data
;
210 dec_usb_memory_use_count(usbm
, &usbm
->vma_use_count
);
213 static struct vm_operations_struct usbdev_vm_ops
= {
214 .open
= usbdev_vm_open
,
215 .close
= usbdev_vm_close
218 static int usbdev_mmap(struct file
*file
, struct vm_area_struct
*vma
)
220 struct usb_memory
*usbm
= NULL
;
221 struct usb_dev_state
*ps
= file
->private_data
;
222 size_t size
= vma
->vm_end
- vma
->vm_start
;
225 dma_addr_t dma_handle
;
228 ret
= usbfs_increase_memory_usage(size
+ sizeof(struct usb_memory
));
232 usbm
= kzalloc(sizeof(struct usb_memory
), GFP_KERNEL
);
235 goto error_decrease_mem
;
238 mem
= usb_alloc_coherent(ps
->dev
, size
, GFP_USER
| __GFP_NOWARN
,
242 goto error_free_usbm
;
245 memset(mem
, 0, size
);
248 usbm
->dma_handle
= dma_handle
;
251 usbm
->vm_start
= vma
->vm_start
;
252 usbm
->vma_use_count
= 1;
253 INIT_LIST_HEAD(&usbm
->memlist
);
255 if (remap_pfn_range(vma
, vma
->vm_start
,
256 virt_to_phys(usbm
->mem
) >> PAGE_SHIFT
,
257 size
, vma
->vm_page_prot
) < 0) {
258 dec_usb_memory_use_count(usbm
, &usbm
->vma_use_count
);
262 vma
->vm_flags
|= VM_IO
;
263 vma
->vm_flags
|= (VM_DONTEXPAND
| VM_DONTDUMP
);
264 vma
->vm_ops
= &usbdev_vm_ops
;
265 vma
->vm_private_data
= usbm
;
267 spin_lock_irqsave(&ps
->lock
, flags
);
268 list_add_tail(&usbm
->memlist
, &ps
->memory_list
);
269 spin_unlock_irqrestore(&ps
->lock
, flags
);
276 usbfs_decrease_memory_usage(size
+ sizeof(struct usb_memory
));
281 static ssize_t
usbdev_read(struct file
*file
, char __user
*buf
, size_t nbytes
,
284 struct usb_dev_state
*ps
= file
->private_data
;
285 struct usb_device
*dev
= ps
->dev
;
292 usb_lock_device(dev
);
293 if (!connected(ps
)) {
296 } else if (pos
< 0) {
301 if (pos
< sizeof(struct usb_device_descriptor
)) {
302 /* 18 bytes - fits on the stack */
303 struct usb_device_descriptor temp_desc
;
305 memcpy(&temp_desc
, &dev
->descriptor
, sizeof(dev
->descriptor
));
306 le16_to_cpus(&temp_desc
.bcdUSB
);
307 le16_to_cpus(&temp_desc
.idVendor
);
308 le16_to_cpus(&temp_desc
.idProduct
);
309 le16_to_cpus(&temp_desc
.bcdDevice
);
311 len
= sizeof(struct usb_device_descriptor
) - pos
;
314 if (copy_to_user(buf
, ((char *)&temp_desc
) + pos
, len
)) {
325 pos
= sizeof(struct usb_device_descriptor
);
326 for (i
= 0; nbytes
&& i
< dev
->descriptor
.bNumConfigurations
; i
++) {
327 struct usb_config_descriptor
*config
=
328 (struct usb_config_descriptor
*)dev
->rawdescriptors
[i
];
329 unsigned int length
= le16_to_cpu(config
->wTotalLength
);
331 if (*ppos
< pos
+ length
) {
333 /* The descriptor may claim to be longer than it
334 * really is. Here is the actual allocated length. */
336 le16_to_cpu(dev
->config
[i
].desc
.wTotalLength
);
338 len
= length
- (*ppos
- pos
);
342 /* Simply don't write (skip over) unallocated parts */
343 if (alloclen
> (*ppos
- pos
)) {
344 alloclen
-= (*ppos
- pos
);
345 if (copy_to_user(buf
,
346 dev
->rawdescriptors
[i
] + (*ppos
- pos
),
347 min(len
, alloclen
))) {
363 usb_unlock_device(dev
);
368 * async list handling
371 static struct async
*alloc_async(unsigned int numisoframes
)
375 as
= kzalloc(sizeof(struct async
), GFP_KERNEL
);
378 as
->urb
= usb_alloc_urb(numisoframes
, GFP_KERNEL
);
386 static void free_async(struct async
*as
)
393 for (i
= 0; i
< as
->urb
->num_sgs
; i
++) {
394 if (sg_page(&as
->urb
->sg
[i
]))
395 kfree(sg_virt(&as
->urb
->sg
[i
]));
399 if (as
->usbm
== NULL
)
400 kfree(as
->urb
->transfer_buffer
);
402 dec_usb_memory_use_count(as
->usbm
, &as
->usbm
->urb_use_count
);
404 kfree(as
->urb
->setup_packet
);
405 usb_free_urb(as
->urb
);
406 usbfs_decrease_memory_usage(as
->mem_usage
);
410 static void async_newpending(struct async
*as
)
412 struct usb_dev_state
*ps
= as
->ps
;
415 spin_lock_irqsave(&ps
->lock
, flags
);
416 list_add_tail(&as
->asynclist
, &ps
->async_pending
);
417 spin_unlock_irqrestore(&ps
->lock
, flags
);
420 static void async_removepending(struct async
*as
)
422 struct usb_dev_state
*ps
= as
->ps
;
425 spin_lock_irqsave(&ps
->lock
, flags
);
426 list_del_init(&as
->asynclist
);
427 spin_unlock_irqrestore(&ps
->lock
, flags
);
430 static struct async
*async_getcompleted(struct usb_dev_state
*ps
)
433 struct async
*as
= NULL
;
435 spin_lock_irqsave(&ps
->lock
, flags
);
436 if (!list_empty(&ps
->async_completed
)) {
437 as
= list_entry(ps
->async_completed
.next
, struct async
,
439 list_del_init(&as
->asynclist
);
441 spin_unlock_irqrestore(&ps
->lock
, flags
);
445 static struct async
*async_getpending(struct usb_dev_state
*ps
,
446 void __user
*userurb
)
450 list_for_each_entry(as
, &ps
->async_pending
, asynclist
)
451 if (as
->userurb
== userurb
) {
452 list_del_init(&as
->asynclist
);
459 static void snoop_urb(struct usb_device
*udev
,
460 void __user
*userurb
, int pipe
, unsigned length
,
461 int timeout_or_status
, enum snoop_when when
,
462 unsigned char *data
, unsigned data_len
)
464 static const char *types
[] = {"isoc", "int", "ctrl", "bulk"};
465 static const char *dirs
[] = {"out", "in"};
472 ep
= usb_pipeendpoint(pipe
);
473 t
= types
[usb_pipetype(pipe
)];
474 d
= dirs
[!!usb_pipein(pipe
)];
476 if (userurb
) { /* Async */
478 dev_info(&udev
->dev
, "userurb %p, ep%d %s-%s, "
480 userurb
, ep
, t
, d
, length
);
482 dev_info(&udev
->dev
, "userurb %p, ep%d %s-%s, "
483 "actual_length %u status %d\n",
484 userurb
, ep
, t
, d
, length
,
488 dev_info(&udev
->dev
, "ep%d %s-%s, length %u, "
490 ep
, t
, d
, length
, timeout_or_status
);
492 dev_info(&udev
->dev
, "ep%d %s-%s, actual_length %u, "
494 ep
, t
, d
, length
, timeout_or_status
);
497 data_len
= min(data_len
, usbfs_snoop_max
);
498 if (data
&& data_len
> 0) {
499 print_hex_dump(KERN_DEBUG
, "data: ", DUMP_PREFIX_NONE
, 32, 1,
504 static void snoop_urb_data(struct urb
*urb
, unsigned len
)
508 len
= min(len
, usbfs_snoop_max
);
509 if (!usbfs_snoop
|| len
== 0)
512 if (urb
->num_sgs
== 0) {
513 print_hex_dump(KERN_DEBUG
, "data: ", DUMP_PREFIX_NONE
, 32, 1,
514 urb
->transfer_buffer
, len
, 1);
518 for (i
= 0; i
< urb
->num_sgs
&& len
; i
++) {
519 size
= (len
> USB_SG_SIZE
) ? USB_SG_SIZE
: len
;
520 print_hex_dump(KERN_DEBUG
, "data: ", DUMP_PREFIX_NONE
, 32, 1,
521 sg_virt(&urb
->sg
[i
]), size
, 1);
526 static int copy_urb_data_to_user(u8 __user
*userbuffer
, struct urb
*urb
)
528 unsigned i
, len
, size
;
530 if (urb
->number_of_packets
> 0) /* Isochronous */
531 len
= urb
->transfer_buffer_length
;
533 len
= urb
->actual_length
;
535 if (urb
->num_sgs
== 0) {
536 if (copy_to_user(userbuffer
, urb
->transfer_buffer
, len
))
541 for (i
= 0; i
< urb
->num_sgs
&& len
; i
++) {
542 size
= (len
> USB_SG_SIZE
) ? USB_SG_SIZE
: len
;
543 if (copy_to_user(userbuffer
, sg_virt(&urb
->sg
[i
]), size
))
552 #define AS_CONTINUATION 1
555 static void cancel_bulk_urbs(struct usb_dev_state
*ps
, unsigned bulk_addr
)
562 /* Mark all the pending URBs that match bulk_addr, up to but not
563 * including the first one without AS_CONTINUATION. If such an
564 * URB is encountered then a new transfer has already started so
565 * the endpoint doesn't need to be disabled; otherwise it does.
567 list_for_each_entry(as
, &ps
->async_pending
, asynclist
) {
568 if (as
->bulk_addr
== bulk_addr
) {
569 if (as
->bulk_status
!= AS_CONTINUATION
)
571 as
->bulk_status
= AS_UNLINK
;
575 ps
->disabled_bulk_eps
|= (1 << bulk_addr
);
577 /* Now carefully unlink all the marked pending URBs */
579 list_for_each_entry(as
, &ps
->async_pending
, asynclist
) {
580 if (as
->bulk_status
== AS_UNLINK
) {
581 as
->bulk_status
= 0; /* Only once */
584 spin_unlock(&ps
->lock
); /* Allow completions */
587 spin_lock(&ps
->lock
);
593 static void async_completed(struct urb
*urb
)
595 struct async
*as
= urb
->context
;
596 struct usb_dev_state
*ps
= as
->ps
;
597 struct siginfo sinfo
;
598 struct pid
*pid
= NULL
;
600 const struct cred
*cred
= NULL
;
603 spin_lock(&ps
->lock
);
604 list_move_tail(&as
->asynclist
, &ps
->async_completed
);
605 as
->status
= urb
->status
;
608 memset(&sinfo
, 0, sizeof(sinfo
));
609 sinfo
.si_signo
= as
->signr
;
610 sinfo
.si_errno
= as
->status
;
611 sinfo
.si_code
= SI_ASYNCIO
;
612 sinfo
.si_addr
= as
->userurb
;
613 pid
= get_pid(as
->pid
);
614 cred
= get_cred(as
->cred
);
617 snoop(&urb
->dev
->dev
, "urb complete\n");
618 snoop_urb(urb
->dev
, as
->userurb
, urb
->pipe
, urb
->actual_length
,
619 as
->status
, COMPLETE
, NULL
, 0);
620 if ((urb
->transfer_flags
& URB_DIR_MASK
) == URB_DIR_IN
)
621 snoop_urb_data(urb
, urb
->actual_length
);
623 if (as
->status
< 0 && as
->bulk_addr
&& as
->status
!= -ECONNRESET
&&
624 as
->status
!= -ENOENT
)
625 cancel_bulk_urbs(ps
, as
->bulk_addr
);
626 spin_unlock(&ps
->lock
);
629 kill_pid_info_as_cred(sinfo
.si_signo
, &sinfo
, pid
, cred
, secid
);
637 static void destroy_async(struct usb_dev_state
*ps
, struct list_head
*list
)
643 spin_lock_irqsave(&ps
->lock
, flags
);
644 while (!list_empty(list
)) {
645 as
= list_entry(list
->next
, struct async
, asynclist
);
646 list_del_init(&as
->asynclist
);
650 /* drop the spinlock so the completion handler can run */
651 spin_unlock_irqrestore(&ps
->lock
, flags
);
654 spin_lock_irqsave(&ps
->lock
, flags
);
656 spin_unlock_irqrestore(&ps
->lock
, flags
);
659 static void destroy_async_on_interface(struct usb_dev_state
*ps
,
662 struct list_head
*p
, *q
, hitlist
;
665 INIT_LIST_HEAD(&hitlist
);
666 spin_lock_irqsave(&ps
->lock
, flags
);
667 list_for_each_safe(p
, q
, &ps
->async_pending
)
668 if (ifnum
== list_entry(p
, struct async
, asynclist
)->ifnum
)
669 list_move_tail(p
, &hitlist
);
670 spin_unlock_irqrestore(&ps
->lock
, flags
);
671 destroy_async(ps
, &hitlist
);
674 static void destroy_all_async(struct usb_dev_state
*ps
)
676 destroy_async(ps
, &ps
->async_pending
);
680 * interface claims are made only at the request of user level code,
681 * which can also release them (explicitly or by closing files).
682 * they're also undone when devices disconnect.
685 static int driver_probe(struct usb_interface
*intf
,
686 const struct usb_device_id
*id
)
691 static void driver_disconnect(struct usb_interface
*intf
)
693 struct usb_dev_state
*ps
= usb_get_intfdata(intf
);
694 unsigned int ifnum
= intf
->altsetting
->desc
.bInterfaceNumber
;
699 /* NOTE: this relies on usbcore having canceled and completed
700 * all pending I/O requests; 2.6 does that.
703 if (likely(ifnum
< 8*sizeof(ps
->ifclaimed
)))
704 clear_bit(ifnum
, &ps
->ifclaimed
);
706 dev_warn(&intf
->dev
, "interface number %u out of range\n",
709 usb_set_intfdata(intf
, NULL
);
711 /* force async requests to complete */
712 destroy_async_on_interface(ps
, ifnum
);
715 /* The following routines are merely placeholders. There is no way
716 * to inform a user task about suspend or resumes.
718 static int driver_suspend(struct usb_interface
*intf
, pm_message_t msg
)
723 static int driver_resume(struct usb_interface
*intf
)
728 struct usb_driver usbfs_driver
= {
730 .probe
= driver_probe
,
731 .disconnect
= driver_disconnect
,
732 .suspend
= driver_suspend
,
733 .resume
= driver_resume
,
736 static int claimintf(struct usb_dev_state
*ps
, unsigned int ifnum
)
738 struct usb_device
*dev
= ps
->dev
;
739 struct usb_interface
*intf
;
742 if (ifnum
>= 8*sizeof(ps
->ifclaimed
))
744 /* already claimed */
745 if (test_bit(ifnum
, &ps
->ifclaimed
))
748 if (ps
->privileges_dropped
&&
749 !test_bit(ifnum
, &ps
->interface_allowed_mask
))
752 intf
= usb_ifnum_to_if(dev
, ifnum
);
756 err
= usb_driver_claim_interface(&usbfs_driver
, intf
, ps
);
758 set_bit(ifnum
, &ps
->ifclaimed
);
762 static int releaseintf(struct usb_dev_state
*ps
, unsigned int ifnum
)
764 struct usb_device
*dev
;
765 struct usb_interface
*intf
;
769 if (ifnum
>= 8*sizeof(ps
->ifclaimed
))
772 intf
= usb_ifnum_to_if(dev
, ifnum
);
775 else if (test_and_clear_bit(ifnum
, &ps
->ifclaimed
)) {
776 usb_driver_release_interface(&usbfs_driver
, intf
);
782 static int checkintf(struct usb_dev_state
*ps
, unsigned int ifnum
)
784 if (ps
->dev
->state
!= USB_STATE_CONFIGURED
)
785 return -EHOSTUNREACH
;
786 if (ifnum
>= 8*sizeof(ps
->ifclaimed
))
788 if (test_bit(ifnum
, &ps
->ifclaimed
))
790 /* if not yet claimed, claim it for the driver */
791 dev_warn(&ps
->dev
->dev
, "usbfs: process %d (%s) did not claim "
792 "interface %u before use\n", task_pid_nr(current
),
793 current
->comm
, ifnum
);
794 return claimintf(ps
, ifnum
);
797 static int findintfep(struct usb_device
*dev
, unsigned int ep
)
799 unsigned int i
, j
, e
;
800 struct usb_interface
*intf
;
801 struct usb_host_interface
*alts
;
802 struct usb_endpoint_descriptor
*endpt
;
804 if (ep
& ~(USB_DIR_IN
|0xf))
808 for (i
= 0; i
< dev
->actconfig
->desc
.bNumInterfaces
; i
++) {
809 intf
= dev
->actconfig
->interface
[i
];
810 for (j
= 0; j
< intf
->num_altsetting
; j
++) {
811 alts
= &intf
->altsetting
[j
];
812 for (e
= 0; e
< alts
->desc
.bNumEndpoints
; e
++) {
813 endpt
= &alts
->endpoint
[e
].desc
;
814 if (endpt
->bEndpointAddress
== ep
)
815 return alts
->desc
.bInterfaceNumber
;
822 static int check_ctrlrecip(struct usb_dev_state
*ps
, unsigned int requesttype
,
823 unsigned int request
, unsigned int index
)
826 struct usb_host_interface
*alt_setting
;
828 if (ps
->dev
->state
!= USB_STATE_UNAUTHENTICATED
829 && ps
->dev
->state
!= USB_STATE_ADDRESS
830 && ps
->dev
->state
!= USB_STATE_CONFIGURED
)
831 return -EHOSTUNREACH
;
832 if (USB_TYPE_VENDOR
== (USB_TYPE_MASK
& requesttype
))
836 * check for the special corner case 'get_device_id' in the printer
837 * class specification, which we always want to allow as it is used
838 * to query things like ink level, etc.
840 if (requesttype
== 0xa1 && request
== 0) {
841 alt_setting
= usb_find_alt_setting(ps
->dev
->actconfig
,
842 index
>> 8, index
& 0xff);
844 && alt_setting
->desc
.bInterfaceClass
== USB_CLASS_PRINTER
)
849 switch (requesttype
& USB_RECIP_MASK
) {
850 case USB_RECIP_ENDPOINT
:
851 if ((index
& ~USB_DIR_IN
) == 0)
853 ret
= findintfep(ps
->dev
, index
);
856 * Some not fully compliant Win apps seem to get
857 * index wrong and have the endpoint number here
858 * rather than the endpoint address (with the
859 * correct direction). Win does let this through,
860 * so we'll not reject it here but leave it to
861 * the device to not break KVM. But we warn.
863 ret
= findintfep(ps
->dev
, index
^ 0x80);
865 dev_info(&ps
->dev
->dev
,
866 "%s: process %i (%s) requesting ep %02x but needs %02x\n",
867 __func__
, task_pid_nr(current
),
868 current
->comm
, index
, index
^ 0x80);
871 ret
= checkintf(ps
, ret
);
874 case USB_RECIP_INTERFACE
:
875 ret
= checkintf(ps
, index
);
881 static struct usb_host_endpoint
*ep_to_host_endpoint(struct usb_device
*dev
,
884 if (ep
& USB_ENDPOINT_DIR_MASK
)
885 return dev
->ep_in
[ep
& USB_ENDPOINT_NUMBER_MASK
];
887 return dev
->ep_out
[ep
& USB_ENDPOINT_NUMBER_MASK
];
890 static int parse_usbdevfs_streams(struct usb_dev_state
*ps
,
891 struct usbdevfs_streams __user
*streams
,
892 unsigned int *num_streams_ret
,
893 unsigned int *num_eps_ret
,
894 struct usb_host_endpoint
***eps_ret
,
895 struct usb_interface
**intf_ret
)
897 unsigned int i
, num_streams
, num_eps
;
898 struct usb_host_endpoint
**eps
;
899 struct usb_interface
*intf
= NULL
;
903 if (get_user(num_streams
, &streams
->num_streams
) ||
904 get_user(num_eps
, &streams
->num_eps
))
907 if (num_eps
< 1 || num_eps
> USB_MAXENDPOINTS
)
910 /* The XHCI controller allows max 2 ^ 16 streams */
911 if (num_streams_ret
&& (num_streams
< 2 || num_streams
> 65536))
914 eps
= kmalloc(num_eps
* sizeof(*eps
), GFP_KERNEL
);
918 for (i
= 0; i
< num_eps
; i
++) {
919 if (get_user(ep
, &streams
->eps
[i
])) {
923 eps
[i
] = ep_to_host_endpoint(ps
->dev
, ep
);
929 /* usb_alloc/free_streams operate on an usb_interface */
930 ifnum
= findintfep(ps
->dev
, ep
);
937 ret
= checkintf(ps
, ifnum
);
940 intf
= usb_ifnum_to_if(ps
->dev
, ifnum
);
942 /* Verify all eps belong to the same interface */
943 if (ifnum
!= intf
->altsetting
->desc
.bInterfaceNumber
) {
951 *num_streams_ret
= num_streams
;
952 *num_eps_ret
= num_eps
;
963 static int match_devt(struct device
*dev
, void *data
)
965 return dev
->devt
== (dev_t
) (unsigned long) data
;
968 static struct usb_device
*usbdev_lookup_by_devt(dev_t devt
)
972 dev
= bus_find_device(&usb_bus_type
, NULL
,
973 (void *) (unsigned long) devt
, match_devt
);
976 return to_usb_device(dev
);
982 static int usbdev_open(struct inode
*inode
, struct file
*file
)
984 struct usb_device
*dev
= NULL
;
985 struct usb_dev_state
*ps
;
989 ps
= kzalloc(sizeof(struct usb_dev_state
), GFP_KERNEL
);
995 /* Protect against simultaneous removal or release */
996 mutex_lock(&usbfs_mutex
);
998 /* usbdev device-node */
999 if (imajor(inode
) == USB_DEVICE_MAJOR
)
1000 dev
= usbdev_lookup_by_devt(inode
->i_rdev
);
1002 mutex_unlock(&usbfs_mutex
);
1007 usb_lock_device(dev
);
1008 if (dev
->state
== USB_STATE_NOTATTACHED
)
1009 goto out_unlock_device
;
1011 ret
= usb_autoresume_device(dev
);
1013 goto out_unlock_device
;
1017 ps
->interface_allowed_mask
= 0xFFFFFFFF; /* 32 bits */
1018 spin_lock_init(&ps
->lock
);
1019 INIT_LIST_HEAD(&ps
->list
);
1020 INIT_LIST_HEAD(&ps
->async_pending
);
1021 INIT_LIST_HEAD(&ps
->async_completed
);
1022 INIT_LIST_HEAD(&ps
->memory_list
);
1023 init_waitqueue_head(&ps
->wait
);
1024 ps
->disc_pid
= get_pid(task_pid(current
));
1025 ps
->cred
= get_current_cred();
1026 security_task_getsecid(current
, &ps
->secid
);
1028 list_add_tail(&ps
->list
, &dev
->filelist
);
1029 file
->private_data
= ps
;
1030 usb_unlock_device(dev
);
1031 snoop(&dev
->dev
, "opened by process %d: %s\n", task_pid_nr(current
),
1036 usb_unlock_device(dev
);
1043 static int usbdev_release(struct inode
*inode
, struct file
*file
)
1045 struct usb_dev_state
*ps
= file
->private_data
;
1046 struct usb_device
*dev
= ps
->dev
;
1050 usb_lock_device(dev
);
1051 usb_hub_release_all_ports(dev
, ps
);
1053 list_del_init(&ps
->list
);
1055 for (ifnum
= 0; ps
->ifclaimed
&& ifnum
< 8*sizeof(ps
->ifclaimed
);
1057 if (test_bit(ifnum
, &ps
->ifclaimed
))
1058 releaseintf(ps
, ifnum
);
1060 destroy_all_async(ps
);
1061 usb_autosuspend_device(dev
);
1062 usb_unlock_device(dev
);
1064 put_pid(ps
->disc_pid
);
1067 as
= async_getcompleted(ps
);
1070 as
= async_getcompleted(ps
);
1077 static int proc_control(struct usb_dev_state
*ps
, void __user
*arg
)
1079 struct usb_device
*dev
= ps
->dev
;
1080 struct usbdevfs_ctrltransfer ctrl
;
1082 unsigned char *tbuf
;
1086 if (copy_from_user(&ctrl
, arg
, sizeof(ctrl
)))
1088 ret
= check_ctrlrecip(ps
, ctrl
.bRequestType
, ctrl
.bRequest
,
1092 wLength
= ctrl
.wLength
; /* To suppress 64k PAGE_SIZE warning */
1093 if (wLength
> PAGE_SIZE
)
1095 ret
= usbfs_increase_memory_usage(PAGE_SIZE
+ sizeof(struct urb
) +
1096 sizeof(struct usb_ctrlrequest
));
1099 tbuf
= (unsigned char *)__get_free_page(GFP_KERNEL
);
1105 snoop(&dev
->dev
, "control urb: bRequestType=%02x "
1106 "bRequest=%02x wValue=%04x "
1107 "wIndex=%04x wLength=%04x\n",
1108 ctrl
.bRequestType
, ctrl
.bRequest
, ctrl
.wValue
,
1109 ctrl
.wIndex
, ctrl
.wLength
);
1110 if (ctrl
.bRequestType
& 0x80) {
1111 if (ctrl
.wLength
&& !access_ok(VERIFY_WRITE
, ctrl
.data
,
1116 pipe
= usb_rcvctrlpipe(dev
, 0);
1117 snoop_urb(dev
, NULL
, pipe
, ctrl
.wLength
, tmo
, SUBMIT
, NULL
, 0);
1119 usb_unlock_device(dev
);
1120 i
= usb_control_msg(dev
, pipe
, ctrl
.bRequest
,
1121 ctrl
.bRequestType
, ctrl
.wValue
, ctrl
.wIndex
,
1122 tbuf
, ctrl
.wLength
, tmo
);
1123 usb_lock_device(dev
);
1124 snoop_urb(dev
, NULL
, pipe
, max(i
, 0), min(i
, 0), COMPLETE
,
1126 if ((i
> 0) && ctrl
.wLength
) {
1127 if (copy_to_user(ctrl
.data
, tbuf
, i
)) {
1134 if (copy_from_user(tbuf
, ctrl
.data
, ctrl
.wLength
)) {
1139 pipe
= usb_sndctrlpipe(dev
, 0);
1140 snoop_urb(dev
, NULL
, pipe
, ctrl
.wLength
, tmo
, SUBMIT
,
1141 tbuf
, ctrl
.wLength
);
1143 usb_unlock_device(dev
);
1144 i
= usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0), ctrl
.bRequest
,
1145 ctrl
.bRequestType
, ctrl
.wValue
, ctrl
.wIndex
,
1146 tbuf
, ctrl
.wLength
, tmo
);
1147 usb_lock_device(dev
);
1148 snoop_urb(dev
, NULL
, pipe
, max(i
, 0), min(i
, 0), COMPLETE
, NULL
, 0);
1150 if (i
< 0 && i
!= -EPIPE
) {
1151 dev_printk(KERN_DEBUG
, &dev
->dev
, "usbfs: USBDEVFS_CONTROL "
1152 "failed cmd %s rqt %u rq %u len %u ret %d\n",
1153 current
->comm
, ctrl
.bRequestType
, ctrl
.bRequest
,
1158 free_page((unsigned long) tbuf
);
1159 usbfs_decrease_memory_usage(PAGE_SIZE
+ sizeof(struct urb
) +
1160 sizeof(struct usb_ctrlrequest
));
1164 static int proc_bulk(struct usb_dev_state
*ps
, void __user
*arg
)
1166 struct usb_device
*dev
= ps
->dev
;
1167 struct usbdevfs_bulktransfer bulk
;
1168 unsigned int tmo
, len1
, pipe
;
1170 unsigned char *tbuf
;
1173 if (copy_from_user(&bulk
, arg
, sizeof(bulk
)))
1175 ret
= findintfep(ps
->dev
, bulk
.ep
);
1178 ret
= checkintf(ps
, ret
);
1181 if (bulk
.ep
& USB_DIR_IN
)
1182 pipe
= usb_rcvbulkpipe(dev
, bulk
.ep
& 0x7f);
1184 pipe
= usb_sndbulkpipe(dev
, bulk
.ep
& 0x7f);
1185 if (!usb_maxpacket(dev
, pipe
, !(bulk
.ep
& USB_DIR_IN
)))
1188 if (len1
>= (INT_MAX
- sizeof(struct urb
)))
1190 ret
= usbfs_increase_memory_usage(len1
+ sizeof(struct urb
));
1193 tbuf
= kmalloc(len1
, GFP_KERNEL
);
1199 if (bulk
.ep
& 0x80) {
1200 if (len1
&& !access_ok(VERIFY_WRITE
, bulk
.data
, len1
)) {
1204 snoop_urb(dev
, NULL
, pipe
, len1
, tmo
, SUBMIT
, NULL
, 0);
1206 usb_unlock_device(dev
);
1207 i
= usb_bulk_msg(dev
, pipe
, tbuf
, len1
, &len2
, tmo
);
1208 usb_lock_device(dev
);
1209 snoop_urb(dev
, NULL
, pipe
, len2
, i
, COMPLETE
, tbuf
, len2
);
1212 if (copy_to_user(bulk
.data
, tbuf
, len2
)) {
1219 if (copy_from_user(tbuf
, bulk
.data
, len1
)) {
1224 snoop_urb(dev
, NULL
, pipe
, len1
, tmo
, SUBMIT
, tbuf
, len1
);
1226 usb_unlock_device(dev
);
1227 i
= usb_bulk_msg(dev
, pipe
, tbuf
, len1
, &len2
, tmo
);
1228 usb_lock_device(dev
);
1229 snoop_urb(dev
, NULL
, pipe
, len2
, i
, COMPLETE
, NULL
, 0);
1231 ret
= (i
< 0 ? i
: len2
);
1234 usbfs_decrease_memory_usage(len1
+ sizeof(struct urb
));
1238 static void check_reset_of_active_ep(struct usb_device
*udev
,
1239 unsigned int epnum
, char *ioctl_name
)
1241 struct usb_host_endpoint
**eps
;
1242 struct usb_host_endpoint
*ep
;
1244 eps
= (epnum
& USB_DIR_IN
) ? udev
->ep_in
: udev
->ep_out
;
1245 ep
= eps
[epnum
& 0x0f];
1246 if (ep
&& !list_empty(&ep
->urb_list
))
1247 dev_warn(&udev
->dev
, "Process %d (%s) called USBDEVFS_%s for active endpoint 0x%02x\n",
1248 task_pid_nr(current
), current
->comm
,
1252 static int proc_resetep(struct usb_dev_state
*ps
, void __user
*arg
)
1257 if (get_user(ep
, (unsigned int __user
*)arg
))
1259 ret
= findintfep(ps
->dev
, ep
);
1262 ret
= checkintf(ps
, ret
);
1265 check_reset_of_active_ep(ps
->dev
, ep
, "RESETEP");
1266 usb_reset_endpoint(ps
->dev
, ep
);
1270 static int proc_clearhalt(struct usb_dev_state
*ps
, void __user
*arg
)
1276 if (get_user(ep
, (unsigned int __user
*)arg
))
1278 ret
= findintfep(ps
->dev
, ep
);
1281 ret
= checkintf(ps
, ret
);
1284 check_reset_of_active_ep(ps
->dev
, ep
, "CLEAR_HALT");
1285 if (ep
& USB_DIR_IN
)
1286 pipe
= usb_rcvbulkpipe(ps
->dev
, ep
& 0x7f);
1288 pipe
= usb_sndbulkpipe(ps
->dev
, ep
& 0x7f);
1290 return usb_clear_halt(ps
->dev
, pipe
);
1293 static int proc_getdriver(struct usb_dev_state
*ps
, void __user
*arg
)
1295 struct usbdevfs_getdriver gd
;
1296 struct usb_interface
*intf
;
1299 if (copy_from_user(&gd
, arg
, sizeof(gd
)))
1301 intf
= usb_ifnum_to_if(ps
->dev
, gd
.interface
);
1302 if (!intf
|| !intf
->dev
.driver
)
1305 strlcpy(gd
.driver
, intf
->dev
.driver
->name
,
1307 ret
= (copy_to_user(arg
, &gd
, sizeof(gd
)) ? -EFAULT
: 0);
1312 static int proc_connectinfo(struct usb_dev_state
*ps
, void __user
*arg
)
1314 struct usbdevfs_connectinfo ci
;
1316 memset(&ci
, 0, sizeof(ci
));
1317 ci
.devnum
= ps
->dev
->devnum
;
1318 ci
.slow
= ps
->dev
->speed
== USB_SPEED_LOW
;
1320 if (copy_to_user(arg
, &ci
, sizeof(ci
)))
1325 static int proc_resetdevice(struct usb_dev_state
*ps
)
1327 struct usb_host_config
*actconfig
= ps
->dev
->actconfig
;
1328 struct usb_interface
*interface
;
1331 /* Don't allow a device reset if the process has dropped the
1332 * privilege to do such things and any of the interfaces are
1333 * currently claimed.
1335 if (ps
->privileges_dropped
&& actconfig
) {
1336 for (i
= 0; i
< actconfig
->desc
.bNumInterfaces
; ++i
) {
1337 interface
= actconfig
->interface
[i
];
1338 number
= interface
->cur_altsetting
->desc
.bInterfaceNumber
;
1339 if (usb_interface_claimed(interface
) &&
1340 !test_bit(number
, &ps
->ifclaimed
)) {
1341 dev_warn(&ps
->dev
->dev
,
1342 "usbfs: interface %d claimed by %s while '%s' resets device\n",
1343 number
, interface
->dev
.driver
->name
, current
->comm
);
1349 return usb_reset_device(ps
->dev
);
1352 static int proc_setintf(struct usb_dev_state
*ps
, void __user
*arg
)
1354 struct usbdevfs_setinterface setintf
;
1357 if (copy_from_user(&setintf
, arg
, sizeof(setintf
)))
1359 ret
= checkintf(ps
, setintf
.interface
);
1363 destroy_async_on_interface(ps
, setintf
.interface
);
1365 return usb_set_interface(ps
->dev
, setintf
.interface
,
1366 setintf
.altsetting
);
1369 static int proc_setconfig(struct usb_dev_state
*ps
, void __user
*arg
)
1373 struct usb_host_config
*actconfig
;
1375 if (get_user(u
, (int __user
*)arg
))
1378 actconfig
= ps
->dev
->actconfig
;
1380 /* Don't touch the device if any interfaces are claimed.
1381 * It could interfere with other drivers' operations, and if
1382 * an interface is claimed by usbfs it could easily deadlock.
1387 for (i
= 0; i
< actconfig
->desc
.bNumInterfaces
; ++i
) {
1388 if (usb_interface_claimed(actconfig
->interface
[i
])) {
1389 dev_warn(&ps
->dev
->dev
,
1390 "usbfs: interface %d claimed by %s "
1391 "while '%s' sets config #%d\n",
1392 actconfig
->interface
[i
]
1394 ->desc
.bInterfaceNumber
,
1395 actconfig
->interface
[i
]
1404 /* SET_CONFIGURATION is often abused as a "cheap" driver reset,
1405 * so avoid usb_set_configuration()'s kick to sysfs
1408 if (actconfig
&& actconfig
->desc
.bConfigurationValue
== u
)
1409 status
= usb_reset_configuration(ps
->dev
);
1411 status
= usb_set_configuration(ps
->dev
, u
);
1417 static struct usb_memory
*
1418 find_memory_area(struct usb_dev_state
*ps
, const struct usbdevfs_urb
*uurb
)
1420 struct usb_memory
*usbm
= NULL
, *iter
;
1421 unsigned long flags
;
1422 unsigned long uurb_start
= (unsigned long)uurb
->buffer
;
1424 spin_lock_irqsave(&ps
->lock
, flags
);
1425 list_for_each_entry(iter
, &ps
->memory_list
, memlist
) {
1426 if (uurb_start
>= iter
->vm_start
&&
1427 uurb_start
< iter
->vm_start
+ iter
->size
) {
1428 if (uurb
->buffer_length
> iter
->vm_start
+ iter
->size
-
1430 usbm
= ERR_PTR(-EINVAL
);
1433 usbm
->urb_use_count
++;
1438 spin_unlock_irqrestore(&ps
->lock
, flags
);
1442 static int proc_do_submiturb(struct usb_dev_state
*ps
, struct usbdevfs_urb
*uurb
,
1443 struct usbdevfs_iso_packet_desc __user
*iso_frame_desc
,
1446 struct usbdevfs_iso_packet_desc
*isopkt
= NULL
;
1447 struct usb_host_endpoint
*ep
;
1448 struct async
*as
= NULL
;
1449 struct usb_ctrlrequest
*dr
= NULL
;
1450 unsigned int u
, totlen
, isofrmlen
;
1451 int i
, ret
, is_in
, num_sgs
= 0, ifnum
= -1;
1452 int number_of_packets
= 0;
1453 unsigned int stream_id
= 0;
1456 if (uurb
->flags
& ~(USBDEVFS_URB_ISO_ASAP
|
1457 USBDEVFS_URB_SHORT_NOT_OK
|
1458 USBDEVFS_URB_BULK_CONTINUATION
|
1459 USBDEVFS_URB_NO_FSBR
|
1460 USBDEVFS_URB_ZERO_PACKET
|
1461 USBDEVFS_URB_NO_INTERRUPT
))
1463 if (uurb
->buffer_length
> 0 && !uurb
->buffer
)
1465 if (!(uurb
->type
== USBDEVFS_URB_TYPE_CONTROL
&&
1466 (uurb
->endpoint
& ~USB_ENDPOINT_DIR_MASK
) == 0)) {
1467 ifnum
= findintfep(ps
->dev
, uurb
->endpoint
);
1470 ret
= checkintf(ps
, ifnum
);
1474 ep
= ep_to_host_endpoint(ps
->dev
, uurb
->endpoint
);
1477 is_in
= (uurb
->endpoint
& USB_ENDPOINT_DIR_MASK
) != 0;
1480 switch (uurb
->type
) {
1481 case USBDEVFS_URB_TYPE_CONTROL
:
1482 if (!usb_endpoint_xfer_control(&ep
->desc
))
1484 /* min 8 byte setup packet */
1485 if (uurb
->buffer_length
< 8)
1487 dr
= kmalloc(sizeof(struct usb_ctrlrequest
), GFP_KERNEL
);
1490 if (copy_from_user(dr
, uurb
->buffer
, 8)) {
1494 if (uurb
->buffer_length
< (le16_to_cpup(&dr
->wLength
) + 8)) {
1498 ret
= check_ctrlrecip(ps
, dr
->bRequestType
, dr
->bRequest
,
1499 le16_to_cpup(&dr
->wIndex
));
1502 uurb
->buffer_length
= le16_to_cpup(&dr
->wLength
);
1504 if ((dr
->bRequestType
& USB_DIR_IN
) && uurb
->buffer_length
) {
1506 uurb
->endpoint
|= USB_DIR_IN
;
1509 uurb
->endpoint
&= ~USB_DIR_IN
;
1511 snoop(&ps
->dev
->dev
, "control urb: bRequestType=%02x "
1512 "bRequest=%02x wValue=%04x "
1513 "wIndex=%04x wLength=%04x\n",
1514 dr
->bRequestType
, dr
->bRequest
,
1515 __le16_to_cpup(&dr
->wValue
),
1516 __le16_to_cpup(&dr
->wIndex
),
1517 __le16_to_cpup(&dr
->wLength
));
1518 u
= sizeof(struct usb_ctrlrequest
);
1521 case USBDEVFS_URB_TYPE_BULK
:
1522 switch (usb_endpoint_type(&ep
->desc
)) {
1523 case USB_ENDPOINT_XFER_CONTROL
:
1524 case USB_ENDPOINT_XFER_ISOC
:
1526 case USB_ENDPOINT_XFER_INT
:
1527 /* allow single-shot interrupt transfers */
1528 uurb
->type
= USBDEVFS_URB_TYPE_INTERRUPT
;
1531 num_sgs
= DIV_ROUND_UP(uurb
->buffer_length
, USB_SG_SIZE
);
1532 if (num_sgs
== 1 || num_sgs
> ps
->dev
->bus
->sg_tablesize
)
1535 stream_id
= uurb
->stream_id
;
1538 case USBDEVFS_URB_TYPE_INTERRUPT
:
1539 if (!usb_endpoint_xfer_int(&ep
->desc
))
1544 case USBDEVFS_URB_TYPE_ISO
:
1545 /* arbitrary limit */
1546 if (uurb
->number_of_packets
< 1 ||
1547 uurb
->number_of_packets
> 128)
1549 if (!usb_endpoint_xfer_isoc(&ep
->desc
))
1551 number_of_packets
= uurb
->number_of_packets
;
1552 isofrmlen
= sizeof(struct usbdevfs_iso_packet_desc
) *
1554 isopkt
= memdup_user(iso_frame_desc
, isofrmlen
);
1555 if (IS_ERR(isopkt
)) {
1556 ret
= PTR_ERR(isopkt
);
1560 for (totlen
= u
= 0; u
< number_of_packets
; u
++) {
1562 * arbitrary limit need for USB 3.0
1563 * bMaxBurst (0~15 allowed, 1~16 packets)
1564 * bmAttributes (bit 1:0, mult 0~2, 1~3 packets)
1565 * sizemax: 1024 * 16 * 3 = 49152
1567 if (isopkt
[u
].length
> 49152) {
1571 totlen
+= isopkt
[u
].length
;
1573 u
*= sizeof(struct usb_iso_packet_descriptor
);
1574 uurb
->buffer_length
= totlen
;
1581 if (uurb
->buffer_length
> 0 &&
1582 !access_ok(is_in
? VERIFY_WRITE
: VERIFY_READ
,
1583 uurb
->buffer
, uurb
->buffer_length
)) {
1587 as
= alloc_async(number_of_packets
);
1593 as
->usbm
= find_memory_area(ps
, uurb
);
1594 if (IS_ERR(as
->usbm
)) {
1595 ret
= PTR_ERR(as
->usbm
);
1600 /* do not use SG buffers when memory mapped segments
1606 u
+= sizeof(struct async
) + sizeof(struct urb
) + uurb
->buffer_length
+
1607 num_sgs
* sizeof(struct scatterlist
);
1608 ret
= usbfs_increase_memory_usage(u
);
1614 as
->urb
->sg
= kmalloc(num_sgs
* sizeof(struct scatterlist
),
1620 as
->urb
->num_sgs
= num_sgs
;
1621 sg_init_table(as
->urb
->sg
, as
->urb
->num_sgs
);
1623 totlen
= uurb
->buffer_length
;
1624 for (i
= 0; i
< as
->urb
->num_sgs
; i
++) {
1625 u
= (totlen
> USB_SG_SIZE
) ? USB_SG_SIZE
: totlen
;
1626 buf
= kmalloc(u
, GFP_KERNEL
);
1631 sg_set_buf(&as
->urb
->sg
[i
], buf
, u
);
1634 if (copy_from_user(buf
, uurb
->buffer
, u
)) {
1642 } else if (uurb
->buffer_length
> 0) {
1644 unsigned long uurb_start
= (unsigned long)uurb
->buffer
;
1646 as
->urb
->transfer_buffer
= as
->usbm
->mem
+
1647 (uurb_start
- as
->usbm
->vm_start
);
1649 as
->urb
->transfer_buffer
= kmalloc(uurb
->buffer_length
,
1651 if (!as
->urb
->transfer_buffer
) {
1656 if (copy_from_user(as
->urb
->transfer_buffer
,
1658 uurb
->buffer_length
)) {
1662 } else if (uurb
->type
== USBDEVFS_URB_TYPE_ISO
) {
1664 * Isochronous input data may end up being
1665 * discontiguous if some of the packets are
1666 * short. Clear the buffer so that the gaps
1667 * don't leak kernel data to userspace.
1669 memset(as
->urb
->transfer_buffer
, 0,
1670 uurb
->buffer_length
);
1674 as
->urb
->dev
= ps
->dev
;
1675 as
->urb
->pipe
= (uurb
->type
<< 30) |
1676 __create_pipe(ps
->dev
, uurb
->endpoint
& 0xf) |
1677 (uurb
->endpoint
& USB_DIR_IN
);
1679 /* This tedious sequence is necessary because the URB_* flags
1680 * are internal to the kernel and subject to change, whereas
1681 * the USBDEVFS_URB_* flags are a user API and must not be changed.
1683 u
= (is_in
? URB_DIR_IN
: URB_DIR_OUT
);
1684 if (uurb
->flags
& USBDEVFS_URB_ISO_ASAP
)
1686 if (uurb
->flags
& USBDEVFS_URB_SHORT_NOT_OK
&& is_in
)
1687 u
|= URB_SHORT_NOT_OK
;
1688 if (uurb
->flags
& USBDEVFS_URB_NO_FSBR
)
1690 if (uurb
->flags
& USBDEVFS_URB_ZERO_PACKET
)
1691 u
|= URB_ZERO_PACKET
;
1692 if (uurb
->flags
& USBDEVFS_URB_NO_INTERRUPT
)
1693 u
|= URB_NO_INTERRUPT
;
1694 as
->urb
->transfer_flags
= u
;
1696 as
->urb
->transfer_buffer_length
= uurb
->buffer_length
;
1697 as
->urb
->setup_packet
= (unsigned char *)dr
;
1699 as
->urb
->start_frame
= uurb
->start_frame
;
1700 as
->urb
->number_of_packets
= number_of_packets
;
1701 as
->urb
->stream_id
= stream_id
;
1703 if (ep
->desc
.bInterval
) {
1704 if (uurb
->type
== USBDEVFS_URB_TYPE_ISO
||
1705 ps
->dev
->speed
== USB_SPEED_HIGH
||
1706 ps
->dev
->speed
>= USB_SPEED_SUPER
)
1707 as
->urb
->interval
= 1 <<
1708 min(15, ep
->desc
.bInterval
- 1);
1710 as
->urb
->interval
= ep
->desc
.bInterval
;
1713 as
->urb
->context
= as
;
1714 as
->urb
->complete
= async_completed
;
1715 for (totlen
= u
= 0; u
< number_of_packets
; u
++) {
1716 as
->urb
->iso_frame_desc
[u
].offset
= totlen
;
1717 as
->urb
->iso_frame_desc
[u
].length
= isopkt
[u
].length
;
1718 totlen
+= isopkt
[u
].length
;
1725 unsigned long uurb_start
= (unsigned long)uurb
->buffer
;
1727 as
->urb
->transfer_flags
|= URB_NO_TRANSFER_DMA_MAP
;
1728 as
->urb
->transfer_dma
= as
->usbm
->dma_handle
+
1729 (uurb_start
- as
->usbm
->vm_start
);
1730 } else if (is_in
&& uurb
->buffer_length
> 0)
1731 as
->userbuffer
= uurb
->buffer
;
1732 as
->signr
= uurb
->signr
;
1734 as
->pid
= get_pid(task_pid(current
));
1735 as
->cred
= get_current_cred();
1736 security_task_getsecid(current
, &as
->secid
);
1737 snoop_urb(ps
->dev
, as
->userurb
, as
->urb
->pipe
,
1738 as
->urb
->transfer_buffer_length
, 0, SUBMIT
,
1741 snoop_urb_data(as
->urb
, as
->urb
->transfer_buffer_length
);
1743 async_newpending(as
);
1745 if (usb_endpoint_xfer_bulk(&ep
->desc
)) {
1746 spin_lock_irq(&ps
->lock
);
1748 /* Not exactly the endpoint address; the direction bit is
1749 * shifted to the 0x10 position so that the value will be
1752 as
->bulk_addr
= usb_endpoint_num(&ep
->desc
) |
1753 ((ep
->desc
.bEndpointAddress
& USB_ENDPOINT_DIR_MASK
)
1756 /* If this bulk URB is the start of a new transfer, re-enable
1757 * the endpoint. Otherwise mark it as a continuation URB.
1759 if (uurb
->flags
& USBDEVFS_URB_BULK_CONTINUATION
)
1760 as
->bulk_status
= AS_CONTINUATION
;
1762 ps
->disabled_bulk_eps
&= ~(1 << as
->bulk_addr
);
1764 /* Don't accept continuation URBs if the endpoint is
1765 * disabled because of an earlier error.
1767 if (ps
->disabled_bulk_eps
& (1 << as
->bulk_addr
))
1770 ret
= usb_submit_urb(as
->urb
, GFP_ATOMIC
);
1771 spin_unlock_irq(&ps
->lock
);
1773 ret
= usb_submit_urb(as
->urb
, GFP_KERNEL
);
1777 dev_printk(KERN_DEBUG
, &ps
->dev
->dev
,
1778 "usbfs: usb_submit_urb returned %d\n", ret
);
1779 snoop_urb(ps
->dev
, as
->userurb
, as
->urb
->pipe
,
1780 0, ret
, COMPLETE
, NULL
, 0);
1781 async_removepending(as
);
1788 dec_usb_memory_use_count(as
->usbm
, &as
->usbm
->urb_use_count
);
1796 static int proc_submiturb(struct usb_dev_state
*ps
, void __user
*arg
)
1798 struct usbdevfs_urb uurb
;
1800 if (copy_from_user(&uurb
, arg
, sizeof(uurb
)))
1803 return proc_do_submiturb(ps
, &uurb
,
1804 (((struct usbdevfs_urb __user
*)arg
)->iso_frame_desc
),
1808 static int proc_unlinkurb(struct usb_dev_state
*ps
, void __user
*arg
)
1812 unsigned long flags
;
1814 spin_lock_irqsave(&ps
->lock
, flags
);
1815 as
= async_getpending(ps
, arg
);
1817 spin_unlock_irqrestore(&ps
->lock
, flags
);
1823 spin_unlock_irqrestore(&ps
->lock
, flags
);
1831 static int processcompl(struct async
*as
, void __user
* __user
*arg
)
1833 struct urb
*urb
= as
->urb
;
1834 struct usbdevfs_urb __user
*userurb
= as
->userurb
;
1835 void __user
*addr
= as
->userurb
;
1838 if (as
->userbuffer
&& urb
->actual_length
) {
1839 if (copy_urb_data_to_user(as
->userbuffer
, urb
))
1842 if (put_user(as
->status
, &userurb
->status
))
1844 if (put_user(urb
->actual_length
, &userurb
->actual_length
))
1846 if (put_user(urb
->error_count
, &userurb
->error_count
))
1849 if (usb_endpoint_xfer_isoc(&urb
->ep
->desc
)) {
1850 for (i
= 0; i
< urb
->number_of_packets
; i
++) {
1851 if (put_user(urb
->iso_frame_desc
[i
].actual_length
,
1852 &userurb
->iso_frame_desc
[i
].actual_length
))
1854 if (put_user(urb
->iso_frame_desc
[i
].status
,
1855 &userurb
->iso_frame_desc
[i
].status
))
1860 if (put_user(addr
, (void __user
* __user
*)arg
))
1868 static struct async
*reap_as(struct usb_dev_state
*ps
)
1870 DECLARE_WAITQUEUE(wait
, current
);
1871 struct async
*as
= NULL
;
1872 struct usb_device
*dev
= ps
->dev
;
1874 add_wait_queue(&ps
->wait
, &wait
);
1876 __set_current_state(TASK_INTERRUPTIBLE
);
1877 as
= async_getcompleted(ps
);
1878 if (as
|| !connected(ps
))
1880 if (signal_pending(current
))
1882 usb_unlock_device(dev
);
1884 usb_lock_device(dev
);
1886 remove_wait_queue(&ps
->wait
, &wait
);
1887 set_current_state(TASK_RUNNING
);
1891 static int proc_reapurb(struct usb_dev_state
*ps
, void __user
*arg
)
1893 struct async
*as
= reap_as(ps
);
1898 snoop(&ps
->dev
->dev
, "reap %p\n", as
->userurb
);
1899 retval
= processcompl(as
, (void __user
* __user
*)arg
);
1903 if (signal_pending(current
))
1908 static int proc_reapurbnonblock(struct usb_dev_state
*ps
, void __user
*arg
)
1913 as
= async_getcompleted(ps
);
1915 snoop(&ps
->dev
->dev
, "reap %p\n", as
->userurb
);
1916 retval
= processcompl(as
, (void __user
* __user
*)arg
);
1919 retval
= (connected(ps
) ? -EAGAIN
: -ENODEV
);
1924 #ifdef CONFIG_COMPAT
1925 static int proc_control_compat(struct usb_dev_state
*ps
,
1926 struct usbdevfs_ctrltransfer32 __user
*p32
)
1928 struct usbdevfs_ctrltransfer __user
*p
;
1930 p
= compat_alloc_user_space(sizeof(*p
));
1931 if (copy_in_user(p
, p32
, (sizeof(*p32
) - sizeof(compat_caddr_t
))) ||
1932 get_user(udata
, &p32
->data
) ||
1933 put_user(compat_ptr(udata
), &p
->data
))
1935 return proc_control(ps
, p
);
1938 static int proc_bulk_compat(struct usb_dev_state
*ps
,
1939 struct usbdevfs_bulktransfer32 __user
*p32
)
1941 struct usbdevfs_bulktransfer __user
*p
;
1943 compat_caddr_t addr
;
1945 p
= compat_alloc_user_space(sizeof(*p
));
1947 if (get_user(n
, &p32
->ep
) || put_user(n
, &p
->ep
) ||
1948 get_user(n
, &p32
->len
) || put_user(n
, &p
->len
) ||
1949 get_user(n
, &p32
->timeout
) || put_user(n
, &p
->timeout
) ||
1950 get_user(addr
, &p32
->data
) || put_user(compat_ptr(addr
), &p
->data
))
1953 return proc_bulk(ps
, p
);
1955 static int proc_disconnectsignal_compat(struct usb_dev_state
*ps
, void __user
*arg
)
1957 struct usbdevfs_disconnectsignal32 ds
;
1959 if (copy_from_user(&ds
, arg
, sizeof(ds
)))
1961 ps
->discsignr
= ds
.signr
;
1962 ps
->disccontext
= compat_ptr(ds
.context
);
1966 static int get_urb32(struct usbdevfs_urb
*kurb
,
1967 struct usbdevfs_urb32 __user
*uurb
)
1970 if (!access_ok(VERIFY_READ
, uurb
, sizeof(*uurb
)) ||
1971 __get_user(kurb
->type
, &uurb
->type
) ||
1972 __get_user(kurb
->endpoint
, &uurb
->endpoint
) ||
1973 __get_user(kurb
->status
, &uurb
->status
) ||
1974 __get_user(kurb
->flags
, &uurb
->flags
) ||
1975 __get_user(kurb
->buffer_length
, &uurb
->buffer_length
) ||
1976 __get_user(kurb
->actual_length
, &uurb
->actual_length
) ||
1977 __get_user(kurb
->start_frame
, &uurb
->start_frame
) ||
1978 __get_user(kurb
->number_of_packets
, &uurb
->number_of_packets
) ||
1979 __get_user(kurb
->error_count
, &uurb
->error_count
) ||
1980 __get_user(kurb
->signr
, &uurb
->signr
))
1983 if (__get_user(uptr
, &uurb
->buffer
))
1985 kurb
->buffer
= compat_ptr(uptr
);
1986 if (__get_user(uptr
, &uurb
->usercontext
))
1988 kurb
->usercontext
= compat_ptr(uptr
);
1993 static int proc_submiturb_compat(struct usb_dev_state
*ps
, void __user
*arg
)
1995 struct usbdevfs_urb uurb
;
1997 if (get_urb32(&uurb
, (struct usbdevfs_urb32 __user
*)arg
))
2000 return proc_do_submiturb(ps
, &uurb
,
2001 ((struct usbdevfs_urb32 __user
*)arg
)->iso_frame_desc
,
2005 static int processcompl_compat(struct async
*as
, void __user
* __user
*arg
)
2007 struct urb
*urb
= as
->urb
;
2008 struct usbdevfs_urb32 __user
*userurb
= as
->userurb
;
2009 void __user
*addr
= as
->userurb
;
2012 if (as
->userbuffer
&& urb
->actual_length
) {
2013 if (copy_urb_data_to_user(as
->userbuffer
, urb
))
2016 if (put_user(as
->status
, &userurb
->status
))
2018 if (put_user(urb
->actual_length
, &userurb
->actual_length
))
2020 if (put_user(urb
->error_count
, &userurb
->error_count
))
2023 if (usb_endpoint_xfer_isoc(&urb
->ep
->desc
)) {
2024 for (i
= 0; i
< urb
->number_of_packets
; i
++) {
2025 if (put_user(urb
->iso_frame_desc
[i
].actual_length
,
2026 &userurb
->iso_frame_desc
[i
].actual_length
))
2028 if (put_user(urb
->iso_frame_desc
[i
].status
,
2029 &userurb
->iso_frame_desc
[i
].status
))
2034 if (put_user(ptr_to_compat(addr
), (u32 __user
*)arg
))
2039 static int proc_reapurb_compat(struct usb_dev_state
*ps
, void __user
*arg
)
2041 struct async
*as
= reap_as(ps
);
2046 snoop(&ps
->dev
->dev
, "reap %p\n", as
->userurb
);
2047 retval
= processcompl_compat(as
, (void __user
* __user
*)arg
);
2051 if (signal_pending(current
))
2056 static int proc_reapurbnonblock_compat(struct usb_dev_state
*ps
, void __user
*arg
)
2061 as
= async_getcompleted(ps
);
2063 snoop(&ps
->dev
->dev
, "reap %p\n", as
->userurb
);
2064 retval
= processcompl_compat(as
, (void __user
* __user
*)arg
);
2067 retval
= (connected(ps
) ? -EAGAIN
: -ENODEV
);
2075 static int proc_disconnectsignal(struct usb_dev_state
*ps
, void __user
*arg
)
2077 struct usbdevfs_disconnectsignal ds
;
2079 if (copy_from_user(&ds
, arg
, sizeof(ds
)))
2081 ps
->discsignr
= ds
.signr
;
2082 ps
->disccontext
= ds
.context
;
2086 static int proc_claiminterface(struct usb_dev_state
*ps
, void __user
*arg
)
2090 if (get_user(ifnum
, (unsigned int __user
*)arg
))
2092 return claimintf(ps
, ifnum
);
2095 static int proc_releaseinterface(struct usb_dev_state
*ps
, void __user
*arg
)
2100 if (get_user(ifnum
, (unsigned int __user
*)arg
))
2102 ret
= releaseintf(ps
, ifnum
);
2105 destroy_async_on_interface(ps
, ifnum
);
2109 static int proc_ioctl(struct usb_dev_state
*ps
, struct usbdevfs_ioctl
*ctl
)
2114 struct usb_interface
*intf
= NULL
;
2115 struct usb_driver
*driver
= NULL
;
2117 if (ps
->privileges_dropped
)
2121 size
= _IOC_SIZE(ctl
->ioctl_code
);
2123 buf
= kmalloc(size
, GFP_KERNEL
);
2126 if ((_IOC_DIR(ctl
->ioctl_code
) & _IOC_WRITE
)) {
2127 if (copy_from_user(buf
, ctl
->data
, size
)) {
2132 memset(buf
, 0, size
);
2136 if (!connected(ps
)) {
2141 if (ps
->dev
->state
!= USB_STATE_CONFIGURED
)
2142 retval
= -EHOSTUNREACH
;
2143 else if (!(intf
= usb_ifnum_to_if(ps
->dev
, ctl
->ifno
)))
2145 else switch (ctl
->ioctl_code
) {
2147 /* disconnect kernel driver from interface */
2148 case USBDEVFS_DISCONNECT
:
2149 if (intf
->dev
.driver
) {
2150 driver
= to_usb_driver(intf
->dev
.driver
);
2151 dev_dbg(&intf
->dev
, "disconnect by usbfs\n");
2152 usb_driver_release_interface(driver
, intf
);
2157 /* let kernel drivers try to (re)bind to the interface */
2158 case USBDEVFS_CONNECT
:
2159 if (!intf
->dev
.driver
)
2160 retval
= device_attach(&intf
->dev
);
2165 /* talk directly to the interface's driver */
2167 if (intf
->dev
.driver
)
2168 driver
= to_usb_driver(intf
->dev
.driver
);
2169 if (driver
== NULL
|| driver
->unlocked_ioctl
== NULL
) {
2172 retval
= driver
->unlocked_ioctl(intf
, ctl
->ioctl_code
, buf
);
2173 if (retval
== -ENOIOCTLCMD
)
2178 /* cleanup and return */
2180 && (_IOC_DIR(ctl
->ioctl_code
) & _IOC_READ
) != 0
2182 && copy_to_user(ctl
->data
, buf
, size
) != 0)
2189 static int proc_ioctl_default(struct usb_dev_state
*ps
, void __user
*arg
)
2191 struct usbdevfs_ioctl ctrl
;
2193 if (copy_from_user(&ctrl
, arg
, sizeof(ctrl
)))
2195 return proc_ioctl(ps
, &ctrl
);
2198 #ifdef CONFIG_COMPAT
2199 static int proc_ioctl_compat(struct usb_dev_state
*ps
, compat_uptr_t arg
)
2201 struct usbdevfs_ioctl32 __user
*uioc
;
2202 struct usbdevfs_ioctl ctrl
;
2205 uioc
= compat_ptr((long)arg
);
2206 if (!access_ok(VERIFY_READ
, uioc
, sizeof(*uioc
)) ||
2207 __get_user(ctrl
.ifno
, &uioc
->ifno
) ||
2208 __get_user(ctrl
.ioctl_code
, &uioc
->ioctl_code
) ||
2209 __get_user(udata
, &uioc
->data
))
2211 ctrl
.data
= compat_ptr(udata
);
2213 return proc_ioctl(ps
, &ctrl
);
2217 static int proc_claim_port(struct usb_dev_state
*ps
, void __user
*arg
)
2222 if (get_user(portnum
, (unsigned __user
*) arg
))
2224 rc
= usb_hub_claim_port(ps
->dev
, portnum
, ps
);
2226 snoop(&ps
->dev
->dev
, "port %d claimed by process %d: %s\n",
2227 portnum
, task_pid_nr(current
), current
->comm
);
2231 static int proc_release_port(struct usb_dev_state
*ps
, void __user
*arg
)
2235 if (get_user(portnum
, (unsigned __user
*) arg
))
2237 return usb_hub_release_port(ps
->dev
, portnum
, ps
);
2240 static int proc_get_capabilities(struct usb_dev_state
*ps
, void __user
*arg
)
2244 caps
= USBDEVFS_CAP_ZERO_PACKET
| USBDEVFS_CAP_NO_PACKET_SIZE_LIM
|
2245 USBDEVFS_CAP_REAP_AFTER_DISCONNECT
| USBDEVFS_CAP_MMAP
|
2246 USBDEVFS_CAP_DROP_PRIVILEGES
;
2247 if (!ps
->dev
->bus
->no_stop_on_short
)
2248 caps
|= USBDEVFS_CAP_BULK_CONTINUATION
;
2249 if (ps
->dev
->bus
->sg_tablesize
)
2250 caps
|= USBDEVFS_CAP_BULK_SCATTER_GATHER
;
2252 if (put_user(caps
, (__u32 __user
*)arg
))
2258 static int proc_disconnect_claim(struct usb_dev_state
*ps
, void __user
*arg
)
2260 struct usbdevfs_disconnect_claim dc
;
2261 struct usb_interface
*intf
;
2263 if (copy_from_user(&dc
, arg
, sizeof(dc
)))
2266 intf
= usb_ifnum_to_if(ps
->dev
, dc
.interface
);
2270 if (intf
->dev
.driver
) {
2271 struct usb_driver
*driver
= to_usb_driver(intf
->dev
.driver
);
2273 if (ps
->privileges_dropped
)
2276 if ((dc
.flags
& USBDEVFS_DISCONNECT_CLAIM_IF_DRIVER
) &&
2277 strncmp(dc
.driver
, intf
->dev
.driver
->name
,
2278 sizeof(dc
.driver
)) != 0)
2281 if ((dc
.flags
& USBDEVFS_DISCONNECT_CLAIM_EXCEPT_DRIVER
) &&
2282 strncmp(dc
.driver
, intf
->dev
.driver
->name
,
2283 sizeof(dc
.driver
)) == 0)
2286 dev_dbg(&intf
->dev
, "disconnect by usbfs\n");
2287 usb_driver_release_interface(driver
, intf
);
2290 return claimintf(ps
, dc
.interface
);
2293 static int proc_alloc_streams(struct usb_dev_state
*ps
, void __user
*arg
)
2295 unsigned num_streams
, num_eps
;
2296 struct usb_host_endpoint
**eps
;
2297 struct usb_interface
*intf
;
2300 r
= parse_usbdevfs_streams(ps
, arg
, &num_streams
, &num_eps
,
2305 destroy_async_on_interface(ps
,
2306 intf
->altsetting
[0].desc
.bInterfaceNumber
);
2308 r
= usb_alloc_streams(intf
, eps
, num_eps
, num_streams
, GFP_KERNEL
);
2313 static int proc_free_streams(struct usb_dev_state
*ps
, void __user
*arg
)
2316 struct usb_host_endpoint
**eps
;
2317 struct usb_interface
*intf
;
2320 r
= parse_usbdevfs_streams(ps
, arg
, NULL
, &num_eps
, &eps
, &intf
);
2324 destroy_async_on_interface(ps
,
2325 intf
->altsetting
[0].desc
.bInterfaceNumber
);
2327 r
= usb_free_streams(intf
, eps
, num_eps
, GFP_KERNEL
);
2332 static int proc_drop_privileges(struct usb_dev_state
*ps
, void __user
*arg
)
2336 if (copy_from_user(&data
, arg
, sizeof(data
)))
2339 /* This is a one way operation. Once privileges are
2340 * dropped, you cannot regain them. You may however reissue
2341 * this ioctl to shrink the allowed interfaces mask.
2343 ps
->interface_allowed_mask
&= data
;
2344 ps
->privileges_dropped
= true;
2350 * NOTE: All requests here that have interface numbers as parameters
2351 * are assuming that somehow the configuration has been prevented from
2352 * changing. But there's no mechanism to ensure that...
2354 static long usbdev_do_ioctl(struct file
*file
, unsigned int cmd
,
2357 struct usb_dev_state
*ps
= file
->private_data
;
2358 struct inode
*inode
= file_inode(file
);
2359 struct usb_device
*dev
= ps
->dev
;
2362 if (!(file
->f_mode
& FMODE_WRITE
))
2365 usb_lock_device(dev
);
2367 /* Reap operations are allowed even after disconnection */
2369 case USBDEVFS_REAPURB
:
2370 snoop(&dev
->dev
, "%s: REAPURB\n", __func__
);
2371 ret
= proc_reapurb(ps
, p
);
2374 case USBDEVFS_REAPURBNDELAY
:
2375 snoop(&dev
->dev
, "%s: REAPURBNDELAY\n", __func__
);
2376 ret
= proc_reapurbnonblock(ps
, p
);
2379 #ifdef CONFIG_COMPAT
2380 case USBDEVFS_REAPURB32
:
2381 snoop(&dev
->dev
, "%s: REAPURB32\n", __func__
);
2382 ret
= proc_reapurb_compat(ps
, p
);
2385 case USBDEVFS_REAPURBNDELAY32
:
2386 snoop(&dev
->dev
, "%s: REAPURBNDELAY32\n", __func__
);
2387 ret
= proc_reapurbnonblock_compat(ps
, p
);
2392 if (!connected(ps
)) {
2393 usb_unlock_device(dev
);
2398 case USBDEVFS_CONTROL
:
2399 snoop(&dev
->dev
, "%s: CONTROL\n", __func__
);
2400 ret
= proc_control(ps
, p
);
2402 inode
->i_mtime
= current_time(inode
);
2406 snoop(&dev
->dev
, "%s: BULK\n", __func__
);
2407 ret
= proc_bulk(ps
, p
);
2409 inode
->i_mtime
= current_time(inode
);
2412 case USBDEVFS_RESETEP
:
2413 snoop(&dev
->dev
, "%s: RESETEP\n", __func__
);
2414 ret
= proc_resetep(ps
, p
);
2416 inode
->i_mtime
= current_time(inode
);
2419 case USBDEVFS_RESET
:
2420 snoop(&dev
->dev
, "%s: RESET\n", __func__
);
2421 ret
= proc_resetdevice(ps
);
2424 case USBDEVFS_CLEAR_HALT
:
2425 snoop(&dev
->dev
, "%s: CLEAR_HALT\n", __func__
);
2426 ret
= proc_clearhalt(ps
, p
);
2428 inode
->i_mtime
= current_time(inode
);
2431 case USBDEVFS_GETDRIVER
:
2432 snoop(&dev
->dev
, "%s: GETDRIVER\n", __func__
);
2433 ret
= proc_getdriver(ps
, p
);
2436 case USBDEVFS_CONNECTINFO
:
2437 snoop(&dev
->dev
, "%s: CONNECTINFO\n", __func__
);
2438 ret
= proc_connectinfo(ps
, p
);
2441 case USBDEVFS_SETINTERFACE
:
2442 snoop(&dev
->dev
, "%s: SETINTERFACE\n", __func__
);
2443 ret
= proc_setintf(ps
, p
);
2446 case USBDEVFS_SETCONFIGURATION
:
2447 snoop(&dev
->dev
, "%s: SETCONFIGURATION\n", __func__
);
2448 ret
= proc_setconfig(ps
, p
);
2451 case USBDEVFS_SUBMITURB
:
2452 snoop(&dev
->dev
, "%s: SUBMITURB\n", __func__
);
2453 ret
= proc_submiturb(ps
, p
);
2455 inode
->i_mtime
= current_time(inode
);
2458 #ifdef CONFIG_COMPAT
2459 case USBDEVFS_CONTROL32
:
2460 snoop(&dev
->dev
, "%s: CONTROL32\n", __func__
);
2461 ret
= proc_control_compat(ps
, p
);
2463 inode
->i_mtime
= current_time(inode
);
2466 case USBDEVFS_BULK32
:
2467 snoop(&dev
->dev
, "%s: BULK32\n", __func__
);
2468 ret
= proc_bulk_compat(ps
, p
);
2470 inode
->i_mtime
= current_time(inode
);
2473 case USBDEVFS_DISCSIGNAL32
:
2474 snoop(&dev
->dev
, "%s: DISCSIGNAL32\n", __func__
);
2475 ret
= proc_disconnectsignal_compat(ps
, p
);
2478 case USBDEVFS_SUBMITURB32
:
2479 snoop(&dev
->dev
, "%s: SUBMITURB32\n", __func__
);
2480 ret
= proc_submiturb_compat(ps
, p
);
2482 inode
->i_mtime
= current_time(inode
);
2485 case USBDEVFS_IOCTL32
:
2486 snoop(&dev
->dev
, "%s: IOCTL32\n", __func__
);
2487 ret
= proc_ioctl_compat(ps
, ptr_to_compat(p
));
2491 case USBDEVFS_DISCARDURB
:
2492 snoop(&dev
->dev
, "%s: DISCARDURB %p\n", __func__
, p
);
2493 ret
= proc_unlinkurb(ps
, p
);
2496 case USBDEVFS_DISCSIGNAL
:
2497 snoop(&dev
->dev
, "%s: DISCSIGNAL\n", __func__
);
2498 ret
= proc_disconnectsignal(ps
, p
);
2501 case USBDEVFS_CLAIMINTERFACE
:
2502 snoop(&dev
->dev
, "%s: CLAIMINTERFACE\n", __func__
);
2503 ret
= proc_claiminterface(ps
, p
);
2506 case USBDEVFS_RELEASEINTERFACE
:
2507 snoop(&dev
->dev
, "%s: RELEASEINTERFACE\n", __func__
);
2508 ret
= proc_releaseinterface(ps
, p
);
2511 case USBDEVFS_IOCTL
:
2512 snoop(&dev
->dev
, "%s: IOCTL\n", __func__
);
2513 ret
= proc_ioctl_default(ps
, p
);
2516 case USBDEVFS_CLAIM_PORT
:
2517 snoop(&dev
->dev
, "%s: CLAIM_PORT\n", __func__
);
2518 ret
= proc_claim_port(ps
, p
);
2521 case USBDEVFS_RELEASE_PORT
:
2522 snoop(&dev
->dev
, "%s: RELEASE_PORT\n", __func__
);
2523 ret
= proc_release_port(ps
, p
);
2525 case USBDEVFS_GET_CAPABILITIES
:
2526 ret
= proc_get_capabilities(ps
, p
);
2528 case USBDEVFS_DISCONNECT_CLAIM
:
2529 ret
= proc_disconnect_claim(ps
, p
);
2531 case USBDEVFS_ALLOC_STREAMS
:
2532 ret
= proc_alloc_streams(ps
, p
);
2534 case USBDEVFS_FREE_STREAMS
:
2535 ret
= proc_free_streams(ps
, p
);
2537 case USBDEVFS_DROP_PRIVILEGES
:
2538 ret
= proc_drop_privileges(ps
, p
);
2543 usb_unlock_device(dev
);
2545 inode
->i_atime
= current_time(inode
);
2549 static long usbdev_ioctl(struct file
*file
, unsigned int cmd
,
2554 ret
= usbdev_do_ioctl(file
, cmd
, (void __user
*)arg
);
2559 #ifdef CONFIG_COMPAT
2560 static long usbdev_compat_ioctl(struct file
*file
, unsigned int cmd
,
2565 ret
= usbdev_do_ioctl(file
, cmd
, compat_ptr(arg
));
2571 /* No kernel lock - fine */
2572 static unsigned int usbdev_poll(struct file
*file
,
2573 struct poll_table_struct
*wait
)
2575 struct usb_dev_state
*ps
= file
->private_data
;
2576 unsigned int mask
= 0;
2578 poll_wait(file
, &ps
->wait
, wait
);
2579 if (file
->f_mode
& FMODE_WRITE
&& !list_empty(&ps
->async_completed
))
2580 mask
|= POLLOUT
| POLLWRNORM
;
2583 if (list_empty(&ps
->list
))
2588 const struct file_operations usbdev_file_operations
= {
2589 .owner
= THIS_MODULE
,
2590 .llseek
= no_seek_end_llseek
,
2591 .read
= usbdev_read
,
2592 .poll
= usbdev_poll
,
2593 .unlocked_ioctl
= usbdev_ioctl
,
2594 #ifdef CONFIG_COMPAT
2595 .compat_ioctl
= usbdev_compat_ioctl
,
2597 .mmap
= usbdev_mmap
,
2598 .open
= usbdev_open
,
2599 .release
= usbdev_release
,
2602 static void usbdev_remove(struct usb_device
*udev
)
2604 struct usb_dev_state
*ps
;
2605 struct siginfo sinfo
;
2607 while (!list_empty(&udev
->filelist
)) {
2608 ps
= list_entry(udev
->filelist
.next
, struct usb_dev_state
, list
);
2609 destroy_all_async(ps
);
2610 wake_up_all(&ps
->wait
);
2611 list_del_init(&ps
->list
);
2612 if (ps
->discsignr
) {
2613 memset(&sinfo
, 0, sizeof(sinfo
));
2614 sinfo
.si_signo
= ps
->discsignr
;
2615 sinfo
.si_errno
= EPIPE
;
2616 sinfo
.si_code
= SI_ASYNCIO
;
2617 sinfo
.si_addr
= ps
->disccontext
;
2618 kill_pid_info_as_cred(ps
->discsignr
, &sinfo
,
2619 ps
->disc_pid
, ps
->cred
, ps
->secid
);
2624 static int usbdev_notify(struct notifier_block
*self
,
2625 unsigned long action
, void *dev
)
2628 case USB_DEVICE_ADD
:
2630 case USB_DEVICE_REMOVE
:
2637 static struct notifier_block usbdev_nb
= {
2638 .notifier_call
= usbdev_notify
,
2641 static struct cdev usb_device_cdev
;
2643 int __init
usb_devio_init(void)
2647 retval
= register_chrdev_region(USB_DEVICE_DEV
, USB_DEVICE_MAX
,
2650 printk(KERN_ERR
"Unable to register minors for usb_device\n");
2653 cdev_init(&usb_device_cdev
, &usbdev_file_operations
);
2654 retval
= cdev_add(&usb_device_cdev
, USB_DEVICE_DEV
, USB_DEVICE_MAX
);
2656 printk(KERN_ERR
"Unable to get usb_device major %d\n",
2660 usb_register_notify(&usbdev_nb
);
2665 unregister_chrdev_region(USB_DEVICE_DEV
, USB_DEVICE_MAX
);
2669 void usb_devio_cleanup(void)
2671 usb_unregister_notify(&usbdev_nb
);
2672 cdev_del(&usb_device_cdev
);
2673 unregister_chrdev_region(USB_DEVICE_DEV
, USB_DEVICE_MAX
);