1 /*****************************************************************************/
4 * devio.c -- User space communication with USB devices.
6 * Copyright (C) 1999-2000 Thomas Sailer (sailer@ife.ee.ethz.ch)
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 * This file implements the usbfs/x/y files, where
23 * x is the bus number and y the device number.
25 * It allows user space programs/"drivers" to communicate directly
26 * with USB devices without intervening kernel driver.
29 * 22.12.1999 0.1 Initial release (split from proc_usb.c)
30 * 04.01.2000 0.2 Turned into its own filesystem
31 * 30.09.2005 0.3 Fix user-triggerable oops in async URB delivery
35 /*****************************************************************************/
39 #include <linux/slab.h>
40 #include <linux/signal.h>
41 #include <linux/poll.h>
42 #include <linux/module.h>
43 #include <linux/string.h>
44 #include <linux/usb.h>
45 #include <linux/usbdevice_fs.h>
46 #include <linux/usb/hcd.h> /* for usbcore internals */
47 #include <linux/cdev.h>
48 #include <linux/notifier.h>
49 #include <linux/security.h>
50 #include <linux/user_namespace.h>
51 #include <linux/scatterlist.h>
52 #include <linux/uaccess.h>
53 #include <linux/dma-mapping.h>
54 #include <asm/byteorder.h>
55 #include <linux/moduleparam.h>
60 #define USB_DEVICE_MAX (USB_MAXBUS * 128)
61 #define USB_SG_SIZE 16384 /* split-size for large txs */
63 /* Mutual exclusion for removal, open, and release */
64 DEFINE_MUTEX(usbfs_mutex
);
66 struct usb_dev_state
{
67 struct list_head list
; /* state list */
68 struct usb_device
*dev
;
70 spinlock_t lock
; /* protects the async urb lists */
71 struct list_head async_pending
;
72 struct list_head async_completed
;
73 struct list_head memory_list
;
74 wait_queue_head_t wait
; /* wake up if a request completed */
75 unsigned int discsignr
;
77 const struct cred
*cred
;
78 void __user
*disccontext
;
79 unsigned long ifclaimed
;
81 u32 disabled_bulk_eps
;
82 bool privileges_dropped
;
83 unsigned long interface_allowed_mask
;
87 struct list_head memlist
;
92 dma_addr_t dma_handle
;
93 unsigned long vm_start
;
94 struct usb_dev_state
*ps
;
98 struct list_head asynclist
;
99 struct usb_dev_state
*ps
;
101 const struct cred
*cred
;
104 void __user
*userbuffer
;
105 void __user
*userurb
;
107 struct usb_memory
*usbm
;
108 unsigned int mem_usage
;
115 static bool usbfs_snoop
;
116 module_param(usbfs_snoop
, bool, S_IRUGO
| S_IWUSR
);
117 MODULE_PARM_DESC(usbfs_snoop
, "true to log all usbfs traffic");
119 static unsigned usbfs_snoop_max
= 65536;
120 module_param(usbfs_snoop_max
, uint
, S_IRUGO
| S_IWUSR
);
121 MODULE_PARM_DESC(usbfs_snoop_max
,
122 "maximum number of bytes to print while snooping");
124 #define snoop(dev, format, arg...) \
127 dev_info(dev, format, ## arg); \
134 #define USB_DEVICE_DEV MKDEV(USB_DEVICE_MAJOR, 0)
136 /* Limit on the total amount of memory we can allocate for transfers */
137 static u32 usbfs_memory_mb
= 16;
138 module_param(usbfs_memory_mb
, uint
, 0644);
139 MODULE_PARM_DESC(usbfs_memory_mb
,
140 "maximum MB allowed for usbfs buffers (0 = no limit)");
142 static atomic64_t usbfs_memory_usage
; /* Total memory currently allocated */
144 /* Check whether it's okay to allocate more memory for a transfer */
145 static int usbfs_increase_memory_usage(u64 amount
)
149 lim
= ACCESS_ONCE(usbfs_memory_mb
);
152 atomic64_add(amount
, &usbfs_memory_usage
);
154 if (lim
> 0 && atomic64_read(&usbfs_memory_usage
) > lim
) {
155 atomic64_sub(amount
, &usbfs_memory_usage
);
162 /* Memory for a transfer is being deallocated */
163 static void usbfs_decrease_memory_usage(u64 amount
)
165 atomic64_sub(amount
, &usbfs_memory_usage
);
168 static int connected(struct usb_dev_state
*ps
)
170 return (!list_empty(&ps
->list
) &&
171 ps
->dev
->state
!= USB_STATE_NOTATTACHED
);
174 static void dec_usb_memory_use_count(struct usb_memory
*usbm
, int *count
)
176 struct usb_dev_state
*ps
= usbm
->ps
;
179 spin_lock_irqsave(&ps
->lock
, flags
);
181 if (usbm
->urb_use_count
== 0 && usbm
->vma_use_count
== 0) {
182 list_del(&usbm
->memlist
);
183 spin_unlock_irqrestore(&ps
->lock
, flags
);
185 usb_free_coherent(ps
->dev
, usbm
->size
, usbm
->mem
,
187 usbfs_decrease_memory_usage(
188 usbm
->size
+ sizeof(struct usb_memory
));
191 spin_unlock_irqrestore(&ps
->lock
, flags
);
195 static void usbdev_vm_open(struct vm_area_struct
*vma
)
197 struct usb_memory
*usbm
= vma
->vm_private_data
;
200 spin_lock_irqsave(&usbm
->ps
->lock
, flags
);
201 ++usbm
->vma_use_count
;
202 spin_unlock_irqrestore(&usbm
->ps
->lock
, flags
);
205 static void usbdev_vm_close(struct vm_area_struct
*vma
)
207 struct usb_memory
*usbm
= vma
->vm_private_data
;
209 dec_usb_memory_use_count(usbm
, &usbm
->vma_use_count
);
212 static struct vm_operations_struct usbdev_vm_ops
= {
213 .open
= usbdev_vm_open
,
214 .close
= usbdev_vm_close
217 static int usbdev_mmap(struct file
*file
, struct vm_area_struct
*vma
)
219 struct usb_memory
*usbm
= NULL
;
220 struct usb_dev_state
*ps
= file
->private_data
;
221 size_t size
= vma
->vm_end
- vma
->vm_start
;
224 dma_addr_t dma_handle
;
227 ret
= usbfs_increase_memory_usage(size
+ sizeof(struct usb_memory
));
231 usbm
= kzalloc(sizeof(struct usb_memory
), GFP_KERNEL
);
234 goto error_decrease_mem
;
237 mem
= usb_alloc_coherent(ps
->dev
, size
, GFP_USER
| __GFP_NOWARN
,
241 goto error_free_usbm
;
244 memset(mem
, 0, size
);
247 usbm
->dma_handle
= dma_handle
;
250 usbm
->vm_start
= vma
->vm_start
;
251 usbm
->vma_use_count
= 1;
252 INIT_LIST_HEAD(&usbm
->memlist
);
254 if (remap_pfn_range(vma
, vma
->vm_start
,
255 virt_to_phys(usbm
->mem
) >> PAGE_SHIFT
,
256 size
, vma
->vm_page_prot
) < 0) {
257 dec_usb_memory_use_count(usbm
, &usbm
->vma_use_count
);
261 vma
->vm_flags
|= VM_IO
;
262 vma
->vm_flags
|= (VM_DONTEXPAND
| VM_DONTDUMP
);
263 vma
->vm_ops
= &usbdev_vm_ops
;
264 vma
->vm_private_data
= usbm
;
266 spin_lock_irqsave(&ps
->lock
, flags
);
267 list_add_tail(&usbm
->memlist
, &ps
->memory_list
);
268 spin_unlock_irqrestore(&ps
->lock
, flags
);
275 usbfs_decrease_memory_usage(size
+ sizeof(struct usb_memory
));
280 static ssize_t
usbdev_read(struct file
*file
, char __user
*buf
, size_t nbytes
,
283 struct usb_dev_state
*ps
= file
->private_data
;
284 struct usb_device
*dev
= ps
->dev
;
291 usb_lock_device(dev
);
292 if (!connected(ps
)) {
295 } else if (pos
< 0) {
300 if (pos
< sizeof(struct usb_device_descriptor
)) {
301 /* 18 bytes - fits on the stack */
302 struct usb_device_descriptor temp_desc
;
304 memcpy(&temp_desc
, &dev
->descriptor
, sizeof(dev
->descriptor
));
305 le16_to_cpus(&temp_desc
.bcdUSB
);
306 le16_to_cpus(&temp_desc
.idVendor
);
307 le16_to_cpus(&temp_desc
.idProduct
);
308 le16_to_cpus(&temp_desc
.bcdDevice
);
310 len
= sizeof(struct usb_device_descriptor
) - pos
;
313 if (copy_to_user(buf
, ((char *)&temp_desc
) + pos
, len
)) {
324 pos
= sizeof(struct usb_device_descriptor
);
325 for (i
= 0; nbytes
&& i
< dev
->descriptor
.bNumConfigurations
; i
++) {
326 struct usb_config_descriptor
*config
=
327 (struct usb_config_descriptor
*)dev
->rawdescriptors
[i
];
328 unsigned int length
= le16_to_cpu(config
->wTotalLength
);
330 if (*ppos
< pos
+ length
) {
332 /* The descriptor may claim to be longer than it
333 * really is. Here is the actual allocated length. */
335 le16_to_cpu(dev
->config
[i
].desc
.wTotalLength
);
337 len
= length
- (*ppos
- pos
);
341 /* Simply don't write (skip over) unallocated parts */
342 if (alloclen
> (*ppos
- pos
)) {
343 alloclen
-= (*ppos
- pos
);
344 if (copy_to_user(buf
,
345 dev
->rawdescriptors
[i
] + (*ppos
- pos
),
346 min(len
, alloclen
))) {
362 usb_unlock_device(dev
);
367 * async list handling
370 static struct async
*alloc_async(unsigned int numisoframes
)
374 as
= kzalloc(sizeof(struct async
), GFP_KERNEL
);
377 as
->urb
= usb_alloc_urb(numisoframes
, GFP_KERNEL
);
385 static void free_async(struct async
*as
)
392 for (i
= 0; i
< as
->urb
->num_sgs
; i
++) {
393 if (sg_page(&as
->urb
->sg
[i
]))
394 kfree(sg_virt(&as
->urb
->sg
[i
]));
398 if (as
->usbm
== NULL
)
399 kfree(as
->urb
->transfer_buffer
);
401 dec_usb_memory_use_count(as
->usbm
, &as
->usbm
->urb_use_count
);
403 kfree(as
->urb
->setup_packet
);
404 usb_free_urb(as
->urb
);
405 usbfs_decrease_memory_usage(as
->mem_usage
);
409 static void async_newpending(struct async
*as
)
411 struct usb_dev_state
*ps
= as
->ps
;
414 spin_lock_irqsave(&ps
->lock
, flags
);
415 list_add_tail(&as
->asynclist
, &ps
->async_pending
);
416 spin_unlock_irqrestore(&ps
->lock
, flags
);
419 static void async_removepending(struct async
*as
)
421 struct usb_dev_state
*ps
= as
->ps
;
424 spin_lock_irqsave(&ps
->lock
, flags
);
425 list_del_init(&as
->asynclist
);
426 spin_unlock_irqrestore(&ps
->lock
, flags
);
429 static struct async
*async_getcompleted(struct usb_dev_state
*ps
)
432 struct async
*as
= NULL
;
434 spin_lock_irqsave(&ps
->lock
, flags
);
435 if (!list_empty(&ps
->async_completed
)) {
436 as
= list_entry(ps
->async_completed
.next
, struct async
,
438 list_del_init(&as
->asynclist
);
440 spin_unlock_irqrestore(&ps
->lock
, flags
);
444 static struct async
*async_getpending(struct usb_dev_state
*ps
,
445 void __user
*userurb
)
449 list_for_each_entry(as
, &ps
->async_pending
, asynclist
)
450 if (as
->userurb
== userurb
) {
451 list_del_init(&as
->asynclist
);
458 static void snoop_urb(struct usb_device
*udev
,
459 void __user
*userurb
, int pipe
, unsigned length
,
460 int timeout_or_status
, enum snoop_when when
,
461 unsigned char *data
, unsigned data_len
)
463 static const char *types
[] = {"isoc", "int", "ctrl", "bulk"};
464 static const char *dirs
[] = {"out", "in"};
471 ep
= usb_pipeendpoint(pipe
);
472 t
= types
[usb_pipetype(pipe
)];
473 d
= dirs
[!!usb_pipein(pipe
)];
475 if (userurb
) { /* Async */
477 dev_info(&udev
->dev
, "userurb %p, ep%d %s-%s, "
479 userurb
, ep
, t
, d
, length
);
481 dev_info(&udev
->dev
, "userurb %p, ep%d %s-%s, "
482 "actual_length %u status %d\n",
483 userurb
, ep
, t
, d
, length
,
487 dev_info(&udev
->dev
, "ep%d %s-%s, length %u, "
489 ep
, t
, d
, length
, timeout_or_status
);
491 dev_info(&udev
->dev
, "ep%d %s-%s, actual_length %u, "
493 ep
, t
, d
, length
, timeout_or_status
);
496 data_len
= min(data_len
, usbfs_snoop_max
);
497 if (data
&& data_len
> 0) {
498 print_hex_dump(KERN_DEBUG
, "data: ", DUMP_PREFIX_NONE
, 32, 1,
503 static void snoop_urb_data(struct urb
*urb
, unsigned len
)
507 len
= min(len
, usbfs_snoop_max
);
508 if (!usbfs_snoop
|| len
== 0)
511 if (urb
->num_sgs
== 0) {
512 print_hex_dump(KERN_DEBUG
, "data: ", DUMP_PREFIX_NONE
, 32, 1,
513 urb
->transfer_buffer
, len
, 1);
517 for (i
= 0; i
< urb
->num_sgs
&& len
; i
++) {
518 size
= (len
> USB_SG_SIZE
) ? USB_SG_SIZE
: len
;
519 print_hex_dump(KERN_DEBUG
, "data: ", DUMP_PREFIX_NONE
, 32, 1,
520 sg_virt(&urb
->sg
[i
]), size
, 1);
525 static int copy_urb_data_to_user(u8 __user
*userbuffer
, struct urb
*urb
)
527 unsigned i
, len
, size
;
529 if (urb
->number_of_packets
> 0) /* Isochronous */
530 len
= urb
->transfer_buffer_length
;
532 len
= urb
->actual_length
;
534 if (urb
->num_sgs
== 0) {
535 if (copy_to_user(userbuffer
, urb
->transfer_buffer
, len
))
540 for (i
= 0; i
< urb
->num_sgs
&& len
; i
++) {
541 size
= (len
> USB_SG_SIZE
) ? USB_SG_SIZE
: len
;
542 if (copy_to_user(userbuffer
, sg_virt(&urb
->sg
[i
]), size
))
551 #define AS_CONTINUATION 1
554 static void cancel_bulk_urbs(struct usb_dev_state
*ps
, unsigned bulk_addr
)
561 /* Mark all the pending URBs that match bulk_addr, up to but not
562 * including the first one without AS_CONTINUATION. If such an
563 * URB is encountered then a new transfer has already started so
564 * the endpoint doesn't need to be disabled; otherwise it does.
566 list_for_each_entry(as
, &ps
->async_pending
, asynclist
) {
567 if (as
->bulk_addr
== bulk_addr
) {
568 if (as
->bulk_status
!= AS_CONTINUATION
)
570 as
->bulk_status
= AS_UNLINK
;
574 ps
->disabled_bulk_eps
|= (1 << bulk_addr
);
576 /* Now carefully unlink all the marked pending URBs */
578 list_for_each_entry(as
, &ps
->async_pending
, asynclist
) {
579 if (as
->bulk_status
== AS_UNLINK
) {
580 as
->bulk_status
= 0; /* Only once */
583 spin_unlock(&ps
->lock
); /* Allow completions */
586 spin_lock(&ps
->lock
);
592 static void async_completed(struct urb
*urb
)
594 struct async
*as
= urb
->context
;
595 struct usb_dev_state
*ps
= as
->ps
;
596 struct siginfo sinfo
;
597 struct pid
*pid
= NULL
;
599 const struct cred
*cred
= NULL
;
602 spin_lock(&ps
->lock
);
603 list_move_tail(&as
->asynclist
, &ps
->async_completed
);
604 as
->status
= urb
->status
;
607 memset(&sinfo
, 0, sizeof(sinfo
));
608 sinfo
.si_signo
= as
->signr
;
609 sinfo
.si_errno
= as
->status
;
610 sinfo
.si_code
= SI_ASYNCIO
;
611 sinfo
.si_addr
= as
->userurb
;
612 pid
= get_pid(as
->pid
);
613 cred
= get_cred(as
->cred
);
616 snoop(&urb
->dev
->dev
, "urb complete\n");
617 snoop_urb(urb
->dev
, as
->userurb
, urb
->pipe
, urb
->actual_length
,
618 as
->status
, COMPLETE
, NULL
, 0);
619 if ((urb
->transfer_flags
& URB_DIR_MASK
) == URB_DIR_IN
)
620 snoop_urb_data(urb
, urb
->actual_length
);
622 if (as
->status
< 0 && as
->bulk_addr
&& as
->status
!= -ECONNRESET
&&
623 as
->status
!= -ENOENT
)
624 cancel_bulk_urbs(ps
, as
->bulk_addr
);
625 spin_unlock(&ps
->lock
);
628 kill_pid_info_as_cred(sinfo
.si_signo
, &sinfo
, pid
, cred
, secid
);
636 static void destroy_async(struct usb_dev_state
*ps
, struct list_head
*list
)
642 spin_lock_irqsave(&ps
->lock
, flags
);
643 while (!list_empty(list
)) {
644 as
= list_entry(list
->next
, struct async
, asynclist
);
645 list_del_init(&as
->asynclist
);
649 /* drop the spinlock so the completion handler can run */
650 spin_unlock_irqrestore(&ps
->lock
, flags
);
653 spin_lock_irqsave(&ps
->lock
, flags
);
655 spin_unlock_irqrestore(&ps
->lock
, flags
);
658 static void destroy_async_on_interface(struct usb_dev_state
*ps
,
661 struct list_head
*p
, *q
, hitlist
;
664 INIT_LIST_HEAD(&hitlist
);
665 spin_lock_irqsave(&ps
->lock
, flags
);
666 list_for_each_safe(p
, q
, &ps
->async_pending
)
667 if (ifnum
== list_entry(p
, struct async
, asynclist
)->ifnum
)
668 list_move_tail(p
, &hitlist
);
669 spin_unlock_irqrestore(&ps
->lock
, flags
);
670 destroy_async(ps
, &hitlist
);
673 static void destroy_all_async(struct usb_dev_state
*ps
)
675 destroy_async(ps
, &ps
->async_pending
);
679 * interface claims are made only at the request of user level code,
680 * which can also release them (explicitly or by closing files).
681 * they're also undone when devices disconnect.
684 static int driver_probe(struct usb_interface
*intf
,
685 const struct usb_device_id
*id
)
690 static void driver_disconnect(struct usb_interface
*intf
)
692 struct usb_dev_state
*ps
= usb_get_intfdata(intf
);
693 unsigned int ifnum
= intf
->altsetting
->desc
.bInterfaceNumber
;
698 /* NOTE: this relies on usbcore having canceled and completed
699 * all pending I/O requests; 2.6 does that.
702 if (likely(ifnum
< 8*sizeof(ps
->ifclaimed
)))
703 clear_bit(ifnum
, &ps
->ifclaimed
);
705 dev_warn(&intf
->dev
, "interface number %u out of range\n",
708 usb_set_intfdata(intf
, NULL
);
710 /* force async requests to complete */
711 destroy_async_on_interface(ps
, ifnum
);
714 /* The following routines are merely placeholders. There is no way
715 * to inform a user task about suspend or resumes.
717 static int driver_suspend(struct usb_interface
*intf
, pm_message_t msg
)
722 static int driver_resume(struct usb_interface
*intf
)
727 struct usb_driver usbfs_driver
= {
729 .probe
= driver_probe
,
730 .disconnect
= driver_disconnect
,
731 .suspend
= driver_suspend
,
732 .resume
= driver_resume
,
735 static int claimintf(struct usb_dev_state
*ps
, unsigned int ifnum
)
737 struct usb_device
*dev
= ps
->dev
;
738 struct usb_interface
*intf
;
741 if (ifnum
>= 8*sizeof(ps
->ifclaimed
))
743 /* already claimed */
744 if (test_bit(ifnum
, &ps
->ifclaimed
))
747 if (ps
->privileges_dropped
&&
748 !test_bit(ifnum
, &ps
->interface_allowed_mask
))
751 intf
= usb_ifnum_to_if(dev
, ifnum
);
755 err
= usb_driver_claim_interface(&usbfs_driver
, intf
, ps
);
757 set_bit(ifnum
, &ps
->ifclaimed
);
761 static int releaseintf(struct usb_dev_state
*ps
, unsigned int ifnum
)
763 struct usb_device
*dev
;
764 struct usb_interface
*intf
;
768 if (ifnum
>= 8*sizeof(ps
->ifclaimed
))
771 intf
= usb_ifnum_to_if(dev
, ifnum
);
774 else if (test_and_clear_bit(ifnum
, &ps
->ifclaimed
)) {
775 usb_driver_release_interface(&usbfs_driver
, intf
);
781 static int checkintf(struct usb_dev_state
*ps
, unsigned int ifnum
)
783 if (ps
->dev
->state
!= USB_STATE_CONFIGURED
)
784 return -EHOSTUNREACH
;
785 if (ifnum
>= 8*sizeof(ps
->ifclaimed
))
787 if (test_bit(ifnum
, &ps
->ifclaimed
))
789 /* if not yet claimed, claim it for the driver */
790 dev_warn(&ps
->dev
->dev
, "usbfs: process %d (%s) did not claim "
791 "interface %u before use\n", task_pid_nr(current
),
792 current
->comm
, ifnum
);
793 return claimintf(ps
, ifnum
);
796 static int findintfep(struct usb_device
*dev
, unsigned int ep
)
798 unsigned int i
, j
, e
;
799 struct usb_interface
*intf
;
800 struct usb_host_interface
*alts
;
801 struct usb_endpoint_descriptor
*endpt
;
803 if (ep
& ~(USB_DIR_IN
|0xf))
807 for (i
= 0; i
< dev
->actconfig
->desc
.bNumInterfaces
; i
++) {
808 intf
= dev
->actconfig
->interface
[i
];
809 for (j
= 0; j
< intf
->num_altsetting
; j
++) {
810 alts
= &intf
->altsetting
[j
];
811 for (e
= 0; e
< alts
->desc
.bNumEndpoints
; e
++) {
812 endpt
= &alts
->endpoint
[e
].desc
;
813 if (endpt
->bEndpointAddress
== ep
)
814 return alts
->desc
.bInterfaceNumber
;
821 static int check_ctrlrecip(struct usb_dev_state
*ps
, unsigned int requesttype
,
822 unsigned int request
, unsigned int index
)
825 struct usb_host_interface
*alt_setting
;
827 if (ps
->dev
->state
!= USB_STATE_UNAUTHENTICATED
828 && ps
->dev
->state
!= USB_STATE_ADDRESS
829 && ps
->dev
->state
!= USB_STATE_CONFIGURED
)
830 return -EHOSTUNREACH
;
831 if (USB_TYPE_VENDOR
== (USB_TYPE_MASK
& requesttype
))
835 * check for the special corner case 'get_device_id' in the printer
836 * class specification, which we always want to allow as it is used
837 * to query things like ink level, etc.
839 if (requesttype
== 0xa1 && request
== 0) {
840 alt_setting
= usb_find_alt_setting(ps
->dev
->actconfig
,
841 index
>> 8, index
& 0xff);
843 && alt_setting
->desc
.bInterfaceClass
== USB_CLASS_PRINTER
)
848 switch (requesttype
& USB_RECIP_MASK
) {
849 case USB_RECIP_ENDPOINT
:
850 if ((index
& ~USB_DIR_IN
) == 0)
852 ret
= findintfep(ps
->dev
, index
);
855 * Some not fully compliant Win apps seem to get
856 * index wrong and have the endpoint number here
857 * rather than the endpoint address (with the
858 * correct direction). Win does let this through,
859 * so we'll not reject it here but leave it to
860 * the device to not break KVM. But we warn.
862 ret
= findintfep(ps
->dev
, index
^ 0x80);
864 dev_info(&ps
->dev
->dev
,
865 "%s: process %i (%s) requesting ep %02x but needs %02x\n",
866 __func__
, task_pid_nr(current
),
867 current
->comm
, index
, index
^ 0x80);
870 ret
= checkintf(ps
, ret
);
873 case USB_RECIP_INTERFACE
:
874 ret
= checkintf(ps
, index
);
880 static struct usb_host_endpoint
*ep_to_host_endpoint(struct usb_device
*dev
,
883 if (ep
& USB_ENDPOINT_DIR_MASK
)
884 return dev
->ep_in
[ep
& USB_ENDPOINT_NUMBER_MASK
];
886 return dev
->ep_out
[ep
& USB_ENDPOINT_NUMBER_MASK
];
889 static int parse_usbdevfs_streams(struct usb_dev_state
*ps
,
890 struct usbdevfs_streams __user
*streams
,
891 unsigned int *num_streams_ret
,
892 unsigned int *num_eps_ret
,
893 struct usb_host_endpoint
***eps_ret
,
894 struct usb_interface
**intf_ret
)
896 unsigned int i
, num_streams
, num_eps
;
897 struct usb_host_endpoint
**eps
;
898 struct usb_interface
*intf
= NULL
;
902 if (get_user(num_streams
, &streams
->num_streams
) ||
903 get_user(num_eps
, &streams
->num_eps
))
906 if (num_eps
< 1 || num_eps
> USB_MAXENDPOINTS
)
909 /* The XHCI controller allows max 2 ^ 16 streams */
910 if (num_streams_ret
&& (num_streams
< 2 || num_streams
> 65536))
913 eps
= kmalloc(num_eps
* sizeof(*eps
), GFP_KERNEL
);
917 for (i
= 0; i
< num_eps
; i
++) {
918 if (get_user(ep
, &streams
->eps
[i
])) {
922 eps
[i
] = ep_to_host_endpoint(ps
->dev
, ep
);
928 /* usb_alloc/free_streams operate on an usb_interface */
929 ifnum
= findintfep(ps
->dev
, ep
);
936 ret
= checkintf(ps
, ifnum
);
939 intf
= usb_ifnum_to_if(ps
->dev
, ifnum
);
941 /* Verify all eps belong to the same interface */
942 if (ifnum
!= intf
->altsetting
->desc
.bInterfaceNumber
) {
950 *num_streams_ret
= num_streams
;
951 *num_eps_ret
= num_eps
;
962 static int match_devt(struct device
*dev
, void *data
)
964 return dev
->devt
== (dev_t
) (unsigned long) data
;
967 static struct usb_device
*usbdev_lookup_by_devt(dev_t devt
)
971 dev
= bus_find_device(&usb_bus_type
, NULL
,
972 (void *) (unsigned long) devt
, match_devt
);
975 return to_usb_device(dev
);
981 static int usbdev_open(struct inode
*inode
, struct file
*file
)
983 struct usb_device
*dev
= NULL
;
984 struct usb_dev_state
*ps
;
988 ps
= kzalloc(sizeof(struct usb_dev_state
), GFP_KERNEL
);
994 /* Protect against simultaneous removal or release */
995 mutex_lock(&usbfs_mutex
);
997 /* usbdev device-node */
998 if (imajor(inode
) == USB_DEVICE_MAJOR
)
999 dev
= usbdev_lookup_by_devt(inode
->i_rdev
);
1001 mutex_unlock(&usbfs_mutex
);
1006 usb_lock_device(dev
);
1007 if (dev
->state
== USB_STATE_NOTATTACHED
)
1008 goto out_unlock_device
;
1010 ret
= usb_autoresume_device(dev
);
1012 goto out_unlock_device
;
1016 ps
->interface_allowed_mask
= 0xFFFFFFFF; /* 32 bits */
1017 spin_lock_init(&ps
->lock
);
1018 INIT_LIST_HEAD(&ps
->list
);
1019 INIT_LIST_HEAD(&ps
->async_pending
);
1020 INIT_LIST_HEAD(&ps
->async_completed
);
1021 INIT_LIST_HEAD(&ps
->memory_list
);
1022 init_waitqueue_head(&ps
->wait
);
1023 ps
->disc_pid
= get_pid(task_pid(current
));
1024 ps
->cred
= get_current_cred();
1025 security_task_getsecid(current
, &ps
->secid
);
1027 list_add_tail(&ps
->list
, &dev
->filelist
);
1028 file
->private_data
= ps
;
1029 usb_unlock_device(dev
);
1030 snoop(&dev
->dev
, "opened by process %d: %s\n", task_pid_nr(current
),
1035 usb_unlock_device(dev
);
1042 static int usbdev_release(struct inode
*inode
, struct file
*file
)
1044 struct usb_dev_state
*ps
= file
->private_data
;
1045 struct usb_device
*dev
= ps
->dev
;
1049 usb_lock_device(dev
);
1050 usb_hub_release_all_ports(dev
, ps
);
1052 list_del_init(&ps
->list
);
1054 for (ifnum
= 0; ps
->ifclaimed
&& ifnum
< 8*sizeof(ps
->ifclaimed
);
1056 if (test_bit(ifnum
, &ps
->ifclaimed
))
1057 releaseintf(ps
, ifnum
);
1059 destroy_all_async(ps
);
1060 usb_autosuspend_device(dev
);
1061 usb_unlock_device(dev
);
1063 put_pid(ps
->disc_pid
);
1066 as
= async_getcompleted(ps
);
1069 as
= async_getcompleted(ps
);
1076 static int proc_control(struct usb_dev_state
*ps
, void __user
*arg
)
1078 struct usb_device
*dev
= ps
->dev
;
1079 struct usbdevfs_ctrltransfer ctrl
;
1081 unsigned char *tbuf
;
1085 if (copy_from_user(&ctrl
, arg
, sizeof(ctrl
)))
1087 ret
= check_ctrlrecip(ps
, ctrl
.bRequestType
, ctrl
.bRequest
,
1091 wLength
= ctrl
.wLength
; /* To suppress 64k PAGE_SIZE warning */
1092 if (wLength
> PAGE_SIZE
)
1094 ret
= usbfs_increase_memory_usage(PAGE_SIZE
+ sizeof(struct urb
) +
1095 sizeof(struct usb_ctrlrequest
));
1098 tbuf
= (unsigned char *)__get_free_page(GFP_KERNEL
);
1104 snoop(&dev
->dev
, "control urb: bRequestType=%02x "
1105 "bRequest=%02x wValue=%04x "
1106 "wIndex=%04x wLength=%04x\n",
1107 ctrl
.bRequestType
, ctrl
.bRequest
, ctrl
.wValue
,
1108 ctrl
.wIndex
, ctrl
.wLength
);
1109 if (ctrl
.bRequestType
& 0x80) {
1110 if (ctrl
.wLength
&& !access_ok(VERIFY_WRITE
, ctrl
.data
,
1115 pipe
= usb_rcvctrlpipe(dev
, 0);
1116 snoop_urb(dev
, NULL
, pipe
, ctrl
.wLength
, tmo
, SUBMIT
, NULL
, 0);
1118 usb_unlock_device(dev
);
1119 i
= usb_control_msg(dev
, pipe
, ctrl
.bRequest
,
1120 ctrl
.bRequestType
, ctrl
.wValue
, ctrl
.wIndex
,
1121 tbuf
, ctrl
.wLength
, tmo
);
1122 usb_lock_device(dev
);
1123 snoop_urb(dev
, NULL
, pipe
, max(i
, 0), min(i
, 0), COMPLETE
,
1125 if ((i
> 0) && ctrl
.wLength
) {
1126 if (copy_to_user(ctrl
.data
, tbuf
, i
)) {
1133 if (copy_from_user(tbuf
, ctrl
.data
, ctrl
.wLength
)) {
1138 pipe
= usb_sndctrlpipe(dev
, 0);
1139 snoop_urb(dev
, NULL
, pipe
, ctrl
.wLength
, tmo
, SUBMIT
,
1140 tbuf
, ctrl
.wLength
);
1142 usb_unlock_device(dev
);
1143 i
= usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0), ctrl
.bRequest
,
1144 ctrl
.bRequestType
, ctrl
.wValue
, ctrl
.wIndex
,
1145 tbuf
, ctrl
.wLength
, tmo
);
1146 usb_lock_device(dev
);
1147 snoop_urb(dev
, NULL
, pipe
, max(i
, 0), min(i
, 0), COMPLETE
, NULL
, 0);
1149 if (i
< 0 && i
!= -EPIPE
) {
1150 dev_printk(KERN_DEBUG
, &dev
->dev
, "usbfs: USBDEVFS_CONTROL "
1151 "failed cmd %s rqt %u rq %u len %u ret %d\n",
1152 current
->comm
, ctrl
.bRequestType
, ctrl
.bRequest
,
1157 free_page((unsigned long) tbuf
);
1158 usbfs_decrease_memory_usage(PAGE_SIZE
+ sizeof(struct urb
) +
1159 sizeof(struct usb_ctrlrequest
));
1163 static int proc_bulk(struct usb_dev_state
*ps
, void __user
*arg
)
1165 struct usb_device
*dev
= ps
->dev
;
1166 struct usbdevfs_bulktransfer bulk
;
1167 unsigned int tmo
, len1
, pipe
;
1169 unsigned char *tbuf
;
1172 if (copy_from_user(&bulk
, arg
, sizeof(bulk
)))
1174 ret
= findintfep(ps
->dev
, bulk
.ep
);
1177 ret
= checkintf(ps
, ret
);
1180 if (bulk
.ep
& USB_DIR_IN
)
1181 pipe
= usb_rcvbulkpipe(dev
, bulk
.ep
& 0x7f);
1183 pipe
= usb_sndbulkpipe(dev
, bulk
.ep
& 0x7f);
1184 if (!usb_maxpacket(dev
, pipe
, !(bulk
.ep
& USB_DIR_IN
)))
1187 if (len1
>= (INT_MAX
- sizeof(struct urb
)))
1189 ret
= usbfs_increase_memory_usage(len1
+ sizeof(struct urb
));
1192 tbuf
= kmalloc(len1
, GFP_KERNEL
);
1198 if (bulk
.ep
& 0x80) {
1199 if (len1
&& !access_ok(VERIFY_WRITE
, bulk
.data
, len1
)) {
1203 snoop_urb(dev
, NULL
, pipe
, len1
, tmo
, SUBMIT
, NULL
, 0);
1205 usb_unlock_device(dev
);
1206 i
= usb_bulk_msg(dev
, pipe
, tbuf
, len1
, &len2
, tmo
);
1207 usb_lock_device(dev
);
1208 snoop_urb(dev
, NULL
, pipe
, len2
, i
, COMPLETE
, tbuf
, len2
);
1211 if (copy_to_user(bulk
.data
, tbuf
, len2
)) {
1218 if (copy_from_user(tbuf
, bulk
.data
, len1
)) {
1223 snoop_urb(dev
, NULL
, pipe
, len1
, tmo
, SUBMIT
, tbuf
, len1
);
1225 usb_unlock_device(dev
);
1226 i
= usb_bulk_msg(dev
, pipe
, tbuf
, len1
, &len2
, tmo
);
1227 usb_lock_device(dev
);
1228 snoop_urb(dev
, NULL
, pipe
, len2
, i
, COMPLETE
, NULL
, 0);
1230 ret
= (i
< 0 ? i
: len2
);
1233 usbfs_decrease_memory_usage(len1
+ sizeof(struct urb
));
1237 static void check_reset_of_active_ep(struct usb_device
*udev
,
1238 unsigned int epnum
, char *ioctl_name
)
1240 struct usb_host_endpoint
**eps
;
1241 struct usb_host_endpoint
*ep
;
1243 eps
= (epnum
& USB_DIR_IN
) ? udev
->ep_in
: udev
->ep_out
;
1244 ep
= eps
[epnum
& 0x0f];
1245 if (ep
&& !list_empty(&ep
->urb_list
))
1246 dev_warn(&udev
->dev
, "Process %d (%s) called USBDEVFS_%s for active endpoint 0x%02x\n",
1247 task_pid_nr(current
), current
->comm
,
1251 static int proc_resetep(struct usb_dev_state
*ps
, void __user
*arg
)
1256 if (get_user(ep
, (unsigned int __user
*)arg
))
1258 ret
= findintfep(ps
->dev
, ep
);
1261 ret
= checkintf(ps
, ret
);
1264 check_reset_of_active_ep(ps
->dev
, ep
, "RESETEP");
1265 usb_reset_endpoint(ps
->dev
, ep
);
1269 static int proc_clearhalt(struct usb_dev_state
*ps
, void __user
*arg
)
1275 if (get_user(ep
, (unsigned int __user
*)arg
))
1277 ret
= findintfep(ps
->dev
, ep
);
1280 ret
= checkintf(ps
, ret
);
1283 check_reset_of_active_ep(ps
->dev
, ep
, "CLEAR_HALT");
1284 if (ep
& USB_DIR_IN
)
1285 pipe
= usb_rcvbulkpipe(ps
->dev
, ep
& 0x7f);
1287 pipe
= usb_sndbulkpipe(ps
->dev
, ep
& 0x7f);
1289 return usb_clear_halt(ps
->dev
, pipe
);
1292 static int proc_getdriver(struct usb_dev_state
*ps
, void __user
*arg
)
1294 struct usbdevfs_getdriver gd
;
1295 struct usb_interface
*intf
;
1298 if (copy_from_user(&gd
, arg
, sizeof(gd
)))
1300 intf
= usb_ifnum_to_if(ps
->dev
, gd
.interface
);
1301 if (!intf
|| !intf
->dev
.driver
)
1304 strlcpy(gd
.driver
, intf
->dev
.driver
->name
,
1306 ret
= (copy_to_user(arg
, &gd
, sizeof(gd
)) ? -EFAULT
: 0);
1311 static int proc_connectinfo(struct usb_dev_state
*ps
, void __user
*arg
)
1313 struct usbdevfs_connectinfo ci
;
1315 memset(&ci
, 0, sizeof(ci
));
1316 ci
.devnum
= ps
->dev
->devnum
;
1317 ci
.slow
= ps
->dev
->speed
== USB_SPEED_LOW
;
1319 if (copy_to_user(arg
, &ci
, sizeof(ci
)))
1324 static int proc_resetdevice(struct usb_dev_state
*ps
)
1326 struct usb_host_config
*actconfig
= ps
->dev
->actconfig
;
1327 struct usb_interface
*interface
;
1330 /* Don't allow a device reset if the process has dropped the
1331 * privilege to do such things and any of the interfaces are
1332 * currently claimed.
1334 if (ps
->privileges_dropped
&& actconfig
) {
1335 for (i
= 0; i
< actconfig
->desc
.bNumInterfaces
; ++i
) {
1336 interface
= actconfig
->interface
[i
];
1337 number
= interface
->cur_altsetting
->desc
.bInterfaceNumber
;
1338 if (usb_interface_claimed(interface
) &&
1339 !test_bit(number
, &ps
->ifclaimed
)) {
1340 dev_warn(&ps
->dev
->dev
,
1341 "usbfs: interface %d claimed by %s while '%s' resets device\n",
1342 number
, interface
->dev
.driver
->name
, current
->comm
);
1348 return usb_reset_device(ps
->dev
);
1351 static int proc_setintf(struct usb_dev_state
*ps
, void __user
*arg
)
1353 struct usbdevfs_setinterface setintf
;
1356 if (copy_from_user(&setintf
, arg
, sizeof(setintf
)))
1358 ret
= checkintf(ps
, setintf
.interface
);
1362 destroy_async_on_interface(ps
, setintf
.interface
);
1364 return usb_set_interface(ps
->dev
, setintf
.interface
,
1365 setintf
.altsetting
);
1368 static int proc_setconfig(struct usb_dev_state
*ps
, void __user
*arg
)
1372 struct usb_host_config
*actconfig
;
1374 if (get_user(u
, (int __user
*)arg
))
1377 actconfig
= ps
->dev
->actconfig
;
1379 /* Don't touch the device if any interfaces are claimed.
1380 * It could interfere with other drivers' operations, and if
1381 * an interface is claimed by usbfs it could easily deadlock.
1386 for (i
= 0; i
< actconfig
->desc
.bNumInterfaces
; ++i
) {
1387 if (usb_interface_claimed(actconfig
->interface
[i
])) {
1388 dev_warn(&ps
->dev
->dev
,
1389 "usbfs: interface %d claimed by %s "
1390 "while '%s' sets config #%d\n",
1391 actconfig
->interface
[i
]
1393 ->desc
.bInterfaceNumber
,
1394 actconfig
->interface
[i
]
1403 /* SET_CONFIGURATION is often abused as a "cheap" driver reset,
1404 * so avoid usb_set_configuration()'s kick to sysfs
1407 if (actconfig
&& actconfig
->desc
.bConfigurationValue
== u
)
1408 status
= usb_reset_configuration(ps
->dev
);
1410 status
= usb_set_configuration(ps
->dev
, u
);
1416 static struct usb_memory
*
1417 find_memory_area(struct usb_dev_state
*ps
, const struct usbdevfs_urb
*uurb
)
1419 struct usb_memory
*usbm
= NULL
, *iter
;
1420 unsigned long flags
;
1421 unsigned long uurb_start
= (unsigned long)uurb
->buffer
;
1423 spin_lock_irqsave(&ps
->lock
, flags
);
1424 list_for_each_entry(iter
, &ps
->memory_list
, memlist
) {
1425 if (uurb_start
>= iter
->vm_start
&&
1426 uurb_start
< iter
->vm_start
+ iter
->size
) {
1427 if (uurb
->buffer_length
> iter
->vm_start
+ iter
->size
-
1429 usbm
= ERR_PTR(-EINVAL
);
1432 usbm
->urb_use_count
++;
1437 spin_unlock_irqrestore(&ps
->lock
, flags
);
1441 static int proc_do_submiturb(struct usb_dev_state
*ps
, struct usbdevfs_urb
*uurb
,
1442 struct usbdevfs_iso_packet_desc __user
*iso_frame_desc
,
1445 struct usbdevfs_iso_packet_desc
*isopkt
= NULL
;
1446 struct usb_host_endpoint
*ep
;
1447 struct async
*as
= NULL
;
1448 struct usb_ctrlrequest
*dr
= NULL
;
1449 unsigned int u
, totlen
, isofrmlen
;
1450 int i
, ret
, is_in
, num_sgs
= 0, ifnum
= -1;
1451 int number_of_packets
= 0;
1452 unsigned int stream_id
= 0;
1455 if (uurb
->flags
& ~(USBDEVFS_URB_ISO_ASAP
|
1456 USBDEVFS_URB_SHORT_NOT_OK
|
1457 USBDEVFS_URB_BULK_CONTINUATION
|
1458 USBDEVFS_URB_NO_FSBR
|
1459 USBDEVFS_URB_ZERO_PACKET
|
1460 USBDEVFS_URB_NO_INTERRUPT
))
1462 if (uurb
->buffer_length
> 0 && !uurb
->buffer
)
1464 if (!(uurb
->type
== USBDEVFS_URB_TYPE_CONTROL
&&
1465 (uurb
->endpoint
& ~USB_ENDPOINT_DIR_MASK
) == 0)) {
1466 ifnum
= findintfep(ps
->dev
, uurb
->endpoint
);
1469 ret
= checkintf(ps
, ifnum
);
1473 ep
= ep_to_host_endpoint(ps
->dev
, uurb
->endpoint
);
1476 is_in
= (uurb
->endpoint
& USB_ENDPOINT_DIR_MASK
) != 0;
1479 switch (uurb
->type
) {
1480 case USBDEVFS_URB_TYPE_CONTROL
:
1481 if (!usb_endpoint_xfer_control(&ep
->desc
))
1483 /* min 8 byte setup packet */
1484 if (uurb
->buffer_length
< 8)
1486 dr
= kmalloc(sizeof(struct usb_ctrlrequest
), GFP_KERNEL
);
1489 if (copy_from_user(dr
, uurb
->buffer
, 8)) {
1493 if (uurb
->buffer_length
< (le16_to_cpup(&dr
->wLength
) + 8)) {
1497 ret
= check_ctrlrecip(ps
, dr
->bRequestType
, dr
->bRequest
,
1498 le16_to_cpup(&dr
->wIndex
));
1501 uurb
->buffer_length
= le16_to_cpup(&dr
->wLength
);
1503 if ((dr
->bRequestType
& USB_DIR_IN
) && uurb
->buffer_length
) {
1505 uurb
->endpoint
|= USB_DIR_IN
;
1508 uurb
->endpoint
&= ~USB_DIR_IN
;
1510 snoop(&ps
->dev
->dev
, "control urb: bRequestType=%02x "
1511 "bRequest=%02x wValue=%04x "
1512 "wIndex=%04x wLength=%04x\n",
1513 dr
->bRequestType
, dr
->bRequest
,
1514 __le16_to_cpup(&dr
->wValue
),
1515 __le16_to_cpup(&dr
->wIndex
),
1516 __le16_to_cpup(&dr
->wLength
));
1517 u
= sizeof(struct usb_ctrlrequest
);
1520 case USBDEVFS_URB_TYPE_BULK
:
1521 switch (usb_endpoint_type(&ep
->desc
)) {
1522 case USB_ENDPOINT_XFER_CONTROL
:
1523 case USB_ENDPOINT_XFER_ISOC
:
1525 case USB_ENDPOINT_XFER_INT
:
1526 /* allow single-shot interrupt transfers */
1527 uurb
->type
= USBDEVFS_URB_TYPE_INTERRUPT
;
1530 num_sgs
= DIV_ROUND_UP(uurb
->buffer_length
, USB_SG_SIZE
);
1531 if (num_sgs
== 1 || num_sgs
> ps
->dev
->bus
->sg_tablesize
)
1534 stream_id
= uurb
->stream_id
;
1537 case USBDEVFS_URB_TYPE_INTERRUPT
:
1538 if (!usb_endpoint_xfer_int(&ep
->desc
))
1543 case USBDEVFS_URB_TYPE_ISO
:
1544 /* arbitrary limit */
1545 if (uurb
->number_of_packets
< 1 ||
1546 uurb
->number_of_packets
> 128)
1548 if (!usb_endpoint_xfer_isoc(&ep
->desc
))
1550 number_of_packets
= uurb
->number_of_packets
;
1551 isofrmlen
= sizeof(struct usbdevfs_iso_packet_desc
) *
1553 isopkt
= memdup_user(iso_frame_desc
, isofrmlen
);
1554 if (IS_ERR(isopkt
)) {
1555 ret
= PTR_ERR(isopkt
);
1559 for (totlen
= u
= 0; u
< number_of_packets
; u
++) {
1561 * arbitrary limit need for USB 3.0
1562 * bMaxBurst (0~15 allowed, 1~16 packets)
1563 * bmAttributes (bit 1:0, mult 0~2, 1~3 packets)
1564 * sizemax: 1024 * 16 * 3 = 49152
1566 if (isopkt
[u
].length
> 49152) {
1570 totlen
+= isopkt
[u
].length
;
1572 u
*= sizeof(struct usb_iso_packet_descriptor
);
1573 uurb
->buffer_length
= totlen
;
1580 if (uurb
->buffer_length
> 0 &&
1581 !access_ok(is_in
? VERIFY_WRITE
: VERIFY_READ
,
1582 uurb
->buffer
, uurb
->buffer_length
)) {
1586 as
= alloc_async(number_of_packets
);
1592 as
->usbm
= find_memory_area(ps
, uurb
);
1593 if (IS_ERR(as
->usbm
)) {
1594 ret
= PTR_ERR(as
->usbm
);
1599 /* do not use SG buffers when memory mapped segments
1605 u
+= sizeof(struct async
) + sizeof(struct urb
) + uurb
->buffer_length
+
1606 num_sgs
* sizeof(struct scatterlist
);
1607 ret
= usbfs_increase_memory_usage(u
);
1613 as
->urb
->sg
= kmalloc(num_sgs
* sizeof(struct scatterlist
),
1619 as
->urb
->num_sgs
= num_sgs
;
1620 sg_init_table(as
->urb
->sg
, as
->urb
->num_sgs
);
1622 totlen
= uurb
->buffer_length
;
1623 for (i
= 0; i
< as
->urb
->num_sgs
; i
++) {
1624 u
= (totlen
> USB_SG_SIZE
) ? USB_SG_SIZE
: totlen
;
1625 buf
= kmalloc(u
, GFP_KERNEL
);
1630 sg_set_buf(&as
->urb
->sg
[i
], buf
, u
);
1633 if (copy_from_user(buf
, uurb
->buffer
, u
)) {
1641 } else if (uurb
->buffer_length
> 0) {
1643 unsigned long uurb_start
= (unsigned long)uurb
->buffer
;
1645 as
->urb
->transfer_buffer
= as
->usbm
->mem
+
1646 (uurb_start
- as
->usbm
->vm_start
);
1648 as
->urb
->transfer_buffer
= kmalloc(uurb
->buffer_length
,
1650 if (!as
->urb
->transfer_buffer
) {
1655 if (copy_from_user(as
->urb
->transfer_buffer
,
1657 uurb
->buffer_length
)) {
1661 } else if (uurb
->type
== USBDEVFS_URB_TYPE_ISO
) {
1663 * Isochronous input data may end up being
1664 * discontiguous if some of the packets are
1665 * short. Clear the buffer so that the gaps
1666 * don't leak kernel data to userspace.
1668 memset(as
->urb
->transfer_buffer
, 0,
1669 uurb
->buffer_length
);
1673 as
->urb
->dev
= ps
->dev
;
1674 as
->urb
->pipe
= (uurb
->type
<< 30) |
1675 __create_pipe(ps
->dev
, uurb
->endpoint
& 0xf) |
1676 (uurb
->endpoint
& USB_DIR_IN
);
1678 /* This tedious sequence is necessary because the URB_* flags
1679 * are internal to the kernel and subject to change, whereas
1680 * the USBDEVFS_URB_* flags are a user API and must not be changed.
1682 u
= (is_in
? URB_DIR_IN
: URB_DIR_OUT
);
1683 if (uurb
->flags
& USBDEVFS_URB_ISO_ASAP
)
1685 if (uurb
->flags
& USBDEVFS_URB_SHORT_NOT_OK
&& is_in
)
1686 u
|= URB_SHORT_NOT_OK
;
1687 if (uurb
->flags
& USBDEVFS_URB_NO_FSBR
)
1689 if (uurb
->flags
& USBDEVFS_URB_ZERO_PACKET
)
1690 u
|= URB_ZERO_PACKET
;
1691 if (uurb
->flags
& USBDEVFS_URB_NO_INTERRUPT
)
1692 u
|= URB_NO_INTERRUPT
;
1693 as
->urb
->transfer_flags
= u
;
1695 as
->urb
->transfer_buffer_length
= uurb
->buffer_length
;
1696 as
->urb
->setup_packet
= (unsigned char *)dr
;
1698 as
->urb
->start_frame
= uurb
->start_frame
;
1699 as
->urb
->number_of_packets
= number_of_packets
;
1700 as
->urb
->stream_id
= stream_id
;
1702 if (ep
->desc
.bInterval
) {
1703 if (uurb
->type
== USBDEVFS_URB_TYPE_ISO
||
1704 ps
->dev
->speed
== USB_SPEED_HIGH
||
1705 ps
->dev
->speed
>= USB_SPEED_SUPER
)
1706 as
->urb
->interval
= 1 <<
1707 min(15, ep
->desc
.bInterval
- 1);
1709 as
->urb
->interval
= ep
->desc
.bInterval
;
1712 as
->urb
->context
= as
;
1713 as
->urb
->complete
= async_completed
;
1714 for (totlen
= u
= 0; u
< number_of_packets
; u
++) {
1715 as
->urb
->iso_frame_desc
[u
].offset
= totlen
;
1716 as
->urb
->iso_frame_desc
[u
].length
= isopkt
[u
].length
;
1717 totlen
+= isopkt
[u
].length
;
1724 unsigned long uurb_start
= (unsigned long)uurb
->buffer
;
1726 as
->urb
->transfer_flags
|= URB_NO_TRANSFER_DMA_MAP
;
1727 as
->urb
->transfer_dma
= as
->usbm
->dma_handle
+
1728 (uurb_start
- as
->usbm
->vm_start
);
1729 } else if (is_in
&& uurb
->buffer_length
> 0)
1730 as
->userbuffer
= uurb
->buffer
;
1731 as
->signr
= uurb
->signr
;
1733 as
->pid
= get_pid(task_pid(current
));
1734 as
->cred
= get_current_cred();
1735 security_task_getsecid(current
, &as
->secid
);
1736 snoop_urb(ps
->dev
, as
->userurb
, as
->urb
->pipe
,
1737 as
->urb
->transfer_buffer_length
, 0, SUBMIT
,
1740 snoop_urb_data(as
->urb
, as
->urb
->transfer_buffer_length
);
1742 async_newpending(as
);
1744 if (usb_endpoint_xfer_bulk(&ep
->desc
)) {
1745 spin_lock_irq(&ps
->lock
);
1747 /* Not exactly the endpoint address; the direction bit is
1748 * shifted to the 0x10 position so that the value will be
1751 as
->bulk_addr
= usb_endpoint_num(&ep
->desc
) |
1752 ((ep
->desc
.bEndpointAddress
& USB_ENDPOINT_DIR_MASK
)
1755 /* If this bulk URB is the start of a new transfer, re-enable
1756 * the endpoint. Otherwise mark it as a continuation URB.
1758 if (uurb
->flags
& USBDEVFS_URB_BULK_CONTINUATION
)
1759 as
->bulk_status
= AS_CONTINUATION
;
1761 ps
->disabled_bulk_eps
&= ~(1 << as
->bulk_addr
);
1763 /* Don't accept continuation URBs if the endpoint is
1764 * disabled because of an earlier error.
1766 if (ps
->disabled_bulk_eps
& (1 << as
->bulk_addr
))
1769 ret
= usb_submit_urb(as
->urb
, GFP_ATOMIC
);
1770 spin_unlock_irq(&ps
->lock
);
1772 ret
= usb_submit_urb(as
->urb
, GFP_KERNEL
);
1776 dev_printk(KERN_DEBUG
, &ps
->dev
->dev
,
1777 "usbfs: usb_submit_urb returned %d\n", ret
);
1778 snoop_urb(ps
->dev
, as
->userurb
, as
->urb
->pipe
,
1779 0, ret
, COMPLETE
, NULL
, 0);
1780 async_removepending(as
);
1787 dec_usb_memory_use_count(as
->usbm
, &as
->usbm
->urb_use_count
);
1795 static int proc_submiturb(struct usb_dev_state
*ps
, void __user
*arg
)
1797 struct usbdevfs_urb uurb
;
1799 if (copy_from_user(&uurb
, arg
, sizeof(uurb
)))
1802 return proc_do_submiturb(ps
, &uurb
,
1803 (((struct usbdevfs_urb __user
*)arg
)->iso_frame_desc
),
1807 static int proc_unlinkurb(struct usb_dev_state
*ps
, void __user
*arg
)
1811 unsigned long flags
;
1813 spin_lock_irqsave(&ps
->lock
, flags
);
1814 as
= async_getpending(ps
, arg
);
1816 spin_unlock_irqrestore(&ps
->lock
, flags
);
1822 spin_unlock_irqrestore(&ps
->lock
, flags
);
1830 static int processcompl(struct async
*as
, void __user
* __user
*arg
)
1832 struct urb
*urb
= as
->urb
;
1833 struct usbdevfs_urb __user
*userurb
= as
->userurb
;
1834 void __user
*addr
= as
->userurb
;
1837 if (as
->userbuffer
&& urb
->actual_length
) {
1838 if (copy_urb_data_to_user(as
->userbuffer
, urb
))
1841 if (put_user(as
->status
, &userurb
->status
))
1843 if (put_user(urb
->actual_length
, &userurb
->actual_length
))
1845 if (put_user(urb
->error_count
, &userurb
->error_count
))
1848 if (usb_endpoint_xfer_isoc(&urb
->ep
->desc
)) {
1849 for (i
= 0; i
< urb
->number_of_packets
; i
++) {
1850 if (put_user(urb
->iso_frame_desc
[i
].actual_length
,
1851 &userurb
->iso_frame_desc
[i
].actual_length
))
1853 if (put_user(urb
->iso_frame_desc
[i
].status
,
1854 &userurb
->iso_frame_desc
[i
].status
))
1859 if (put_user(addr
, (void __user
* __user
*)arg
))
1867 static struct async
*reap_as(struct usb_dev_state
*ps
)
1869 DECLARE_WAITQUEUE(wait
, current
);
1870 struct async
*as
= NULL
;
1871 struct usb_device
*dev
= ps
->dev
;
1873 add_wait_queue(&ps
->wait
, &wait
);
1875 __set_current_state(TASK_INTERRUPTIBLE
);
1876 as
= async_getcompleted(ps
);
1877 if (as
|| !connected(ps
))
1879 if (signal_pending(current
))
1881 usb_unlock_device(dev
);
1883 usb_lock_device(dev
);
1885 remove_wait_queue(&ps
->wait
, &wait
);
1886 set_current_state(TASK_RUNNING
);
1890 static int proc_reapurb(struct usb_dev_state
*ps
, void __user
*arg
)
1892 struct async
*as
= reap_as(ps
);
1897 snoop(&ps
->dev
->dev
, "reap %p\n", as
->userurb
);
1898 retval
= processcompl(as
, (void __user
* __user
*)arg
);
1902 if (signal_pending(current
))
1907 static int proc_reapurbnonblock(struct usb_dev_state
*ps
, void __user
*arg
)
1912 as
= async_getcompleted(ps
);
1914 snoop(&ps
->dev
->dev
, "reap %p\n", as
->userurb
);
1915 retval
= processcompl(as
, (void __user
* __user
*)arg
);
1918 retval
= (connected(ps
) ? -EAGAIN
: -ENODEV
);
1923 #ifdef CONFIG_COMPAT
1924 static int proc_control_compat(struct usb_dev_state
*ps
,
1925 struct usbdevfs_ctrltransfer32 __user
*p32
)
1927 struct usbdevfs_ctrltransfer __user
*p
;
1929 p
= compat_alloc_user_space(sizeof(*p
));
1930 if (copy_in_user(p
, p32
, (sizeof(*p32
) - sizeof(compat_caddr_t
))) ||
1931 get_user(udata
, &p32
->data
) ||
1932 put_user(compat_ptr(udata
), &p
->data
))
1934 return proc_control(ps
, p
);
1937 static int proc_bulk_compat(struct usb_dev_state
*ps
,
1938 struct usbdevfs_bulktransfer32 __user
*p32
)
1940 struct usbdevfs_bulktransfer __user
*p
;
1942 compat_caddr_t addr
;
1944 p
= compat_alloc_user_space(sizeof(*p
));
1946 if (get_user(n
, &p32
->ep
) || put_user(n
, &p
->ep
) ||
1947 get_user(n
, &p32
->len
) || put_user(n
, &p
->len
) ||
1948 get_user(n
, &p32
->timeout
) || put_user(n
, &p
->timeout
) ||
1949 get_user(addr
, &p32
->data
) || put_user(compat_ptr(addr
), &p
->data
))
1952 return proc_bulk(ps
, p
);
1954 static int proc_disconnectsignal_compat(struct usb_dev_state
*ps
, void __user
*arg
)
1956 struct usbdevfs_disconnectsignal32 ds
;
1958 if (copy_from_user(&ds
, arg
, sizeof(ds
)))
1960 ps
->discsignr
= ds
.signr
;
1961 ps
->disccontext
= compat_ptr(ds
.context
);
1965 static int get_urb32(struct usbdevfs_urb
*kurb
,
1966 struct usbdevfs_urb32 __user
*uurb
)
1969 if (!access_ok(VERIFY_READ
, uurb
, sizeof(*uurb
)) ||
1970 __get_user(kurb
->type
, &uurb
->type
) ||
1971 __get_user(kurb
->endpoint
, &uurb
->endpoint
) ||
1972 __get_user(kurb
->status
, &uurb
->status
) ||
1973 __get_user(kurb
->flags
, &uurb
->flags
) ||
1974 __get_user(kurb
->buffer_length
, &uurb
->buffer_length
) ||
1975 __get_user(kurb
->actual_length
, &uurb
->actual_length
) ||
1976 __get_user(kurb
->start_frame
, &uurb
->start_frame
) ||
1977 __get_user(kurb
->number_of_packets
, &uurb
->number_of_packets
) ||
1978 __get_user(kurb
->error_count
, &uurb
->error_count
) ||
1979 __get_user(kurb
->signr
, &uurb
->signr
))
1982 if (__get_user(uptr
, &uurb
->buffer
))
1984 kurb
->buffer
= compat_ptr(uptr
);
1985 if (__get_user(uptr
, &uurb
->usercontext
))
1987 kurb
->usercontext
= compat_ptr(uptr
);
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 %p\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 %p\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 __user
*uioc
;
2201 struct usbdevfs_ioctl ctrl
;
2204 uioc
= compat_ptr((long)arg
);
2205 if (!access_ok(VERIFY_READ
, uioc
, sizeof(*uioc
)) ||
2206 __get_user(ctrl
.ifno
, &uioc
->ifno
) ||
2207 __get_user(ctrl
.ioctl_code
, &uioc
->ioctl_code
) ||
2208 __get_user(udata
, &uioc
->data
))
2210 ctrl
.data
= compat_ptr(udata
);
2212 return proc_ioctl(ps
, &ctrl
);
2216 static int proc_claim_port(struct usb_dev_state
*ps
, void __user
*arg
)
2221 if (get_user(portnum
, (unsigned __user
*) arg
))
2223 rc
= usb_hub_claim_port(ps
->dev
, portnum
, ps
);
2225 snoop(&ps
->dev
->dev
, "port %d claimed by process %d: %s\n",
2226 portnum
, task_pid_nr(current
), current
->comm
);
2230 static int proc_release_port(struct usb_dev_state
*ps
, void __user
*arg
)
2234 if (get_user(portnum
, (unsigned __user
*) arg
))
2236 return usb_hub_release_port(ps
->dev
, portnum
, ps
);
2239 static int proc_get_capabilities(struct usb_dev_state
*ps
, void __user
*arg
)
2243 caps
= USBDEVFS_CAP_ZERO_PACKET
| USBDEVFS_CAP_NO_PACKET_SIZE_LIM
|
2244 USBDEVFS_CAP_REAP_AFTER_DISCONNECT
| USBDEVFS_CAP_MMAP
|
2245 USBDEVFS_CAP_DROP_PRIVILEGES
;
2246 if (!ps
->dev
->bus
->no_stop_on_short
)
2247 caps
|= USBDEVFS_CAP_BULK_CONTINUATION
;
2248 if (ps
->dev
->bus
->sg_tablesize
)
2249 caps
|= USBDEVFS_CAP_BULK_SCATTER_GATHER
;
2251 if (put_user(caps
, (__u32 __user
*)arg
))
2257 static int proc_disconnect_claim(struct usb_dev_state
*ps
, void __user
*arg
)
2259 struct usbdevfs_disconnect_claim dc
;
2260 struct usb_interface
*intf
;
2262 if (copy_from_user(&dc
, arg
, sizeof(dc
)))
2265 intf
= usb_ifnum_to_if(ps
->dev
, dc
.interface
);
2269 if (intf
->dev
.driver
) {
2270 struct usb_driver
*driver
= to_usb_driver(intf
->dev
.driver
);
2272 if (ps
->privileges_dropped
)
2275 if ((dc
.flags
& USBDEVFS_DISCONNECT_CLAIM_IF_DRIVER
) &&
2276 strncmp(dc
.driver
, intf
->dev
.driver
->name
,
2277 sizeof(dc
.driver
)) != 0)
2280 if ((dc
.flags
& USBDEVFS_DISCONNECT_CLAIM_EXCEPT_DRIVER
) &&
2281 strncmp(dc
.driver
, intf
->dev
.driver
->name
,
2282 sizeof(dc
.driver
)) == 0)
2285 dev_dbg(&intf
->dev
, "disconnect by usbfs\n");
2286 usb_driver_release_interface(driver
, intf
);
2289 return claimintf(ps
, dc
.interface
);
2292 static int proc_alloc_streams(struct usb_dev_state
*ps
, void __user
*arg
)
2294 unsigned num_streams
, num_eps
;
2295 struct usb_host_endpoint
**eps
;
2296 struct usb_interface
*intf
;
2299 r
= parse_usbdevfs_streams(ps
, arg
, &num_streams
, &num_eps
,
2304 destroy_async_on_interface(ps
,
2305 intf
->altsetting
[0].desc
.bInterfaceNumber
);
2307 r
= usb_alloc_streams(intf
, eps
, num_eps
, num_streams
, GFP_KERNEL
);
2312 static int proc_free_streams(struct usb_dev_state
*ps
, void __user
*arg
)
2315 struct usb_host_endpoint
**eps
;
2316 struct usb_interface
*intf
;
2319 r
= parse_usbdevfs_streams(ps
, arg
, NULL
, &num_eps
, &eps
, &intf
);
2323 destroy_async_on_interface(ps
,
2324 intf
->altsetting
[0].desc
.bInterfaceNumber
);
2326 r
= usb_free_streams(intf
, eps
, num_eps
, GFP_KERNEL
);
2331 static int proc_drop_privileges(struct usb_dev_state
*ps
, void __user
*arg
)
2335 if (copy_from_user(&data
, arg
, sizeof(data
)))
2338 /* This is a one way operation. Once privileges are
2339 * dropped, you cannot regain them. You may however reissue
2340 * this ioctl to shrink the allowed interfaces mask.
2342 ps
->interface_allowed_mask
&= data
;
2343 ps
->privileges_dropped
= true;
2349 * NOTE: All requests here that have interface numbers as parameters
2350 * are assuming that somehow the configuration has been prevented from
2351 * changing. But there's no mechanism to ensure that...
2353 static long usbdev_do_ioctl(struct file
*file
, unsigned int cmd
,
2356 struct usb_dev_state
*ps
= file
->private_data
;
2357 struct inode
*inode
= file_inode(file
);
2358 struct usb_device
*dev
= ps
->dev
;
2361 if (!(file
->f_mode
& FMODE_WRITE
))
2364 usb_lock_device(dev
);
2366 /* Reap operations are allowed even after disconnection */
2368 case USBDEVFS_REAPURB
:
2369 snoop(&dev
->dev
, "%s: REAPURB\n", __func__
);
2370 ret
= proc_reapurb(ps
, p
);
2373 case USBDEVFS_REAPURBNDELAY
:
2374 snoop(&dev
->dev
, "%s: REAPURBNDELAY\n", __func__
);
2375 ret
= proc_reapurbnonblock(ps
, p
);
2378 #ifdef CONFIG_COMPAT
2379 case USBDEVFS_REAPURB32
:
2380 snoop(&dev
->dev
, "%s: REAPURB32\n", __func__
);
2381 ret
= proc_reapurb_compat(ps
, p
);
2384 case USBDEVFS_REAPURBNDELAY32
:
2385 snoop(&dev
->dev
, "%s: REAPURBNDELAY32\n", __func__
);
2386 ret
= proc_reapurbnonblock_compat(ps
, p
);
2391 if (!connected(ps
)) {
2392 usb_unlock_device(dev
);
2397 case USBDEVFS_CONTROL
:
2398 snoop(&dev
->dev
, "%s: CONTROL\n", __func__
);
2399 ret
= proc_control(ps
, p
);
2401 inode
->i_mtime
= current_time(inode
);
2405 snoop(&dev
->dev
, "%s: BULK\n", __func__
);
2406 ret
= proc_bulk(ps
, p
);
2408 inode
->i_mtime
= current_time(inode
);
2411 case USBDEVFS_RESETEP
:
2412 snoop(&dev
->dev
, "%s: RESETEP\n", __func__
);
2413 ret
= proc_resetep(ps
, p
);
2415 inode
->i_mtime
= current_time(inode
);
2418 case USBDEVFS_RESET
:
2419 snoop(&dev
->dev
, "%s: RESET\n", __func__
);
2420 ret
= proc_resetdevice(ps
);
2423 case USBDEVFS_CLEAR_HALT
:
2424 snoop(&dev
->dev
, "%s: CLEAR_HALT\n", __func__
);
2425 ret
= proc_clearhalt(ps
, p
);
2427 inode
->i_mtime
= current_time(inode
);
2430 case USBDEVFS_GETDRIVER
:
2431 snoop(&dev
->dev
, "%s: GETDRIVER\n", __func__
);
2432 ret
= proc_getdriver(ps
, p
);
2435 case USBDEVFS_CONNECTINFO
:
2436 snoop(&dev
->dev
, "%s: CONNECTINFO\n", __func__
);
2437 ret
= proc_connectinfo(ps
, p
);
2440 case USBDEVFS_SETINTERFACE
:
2441 snoop(&dev
->dev
, "%s: SETINTERFACE\n", __func__
);
2442 ret
= proc_setintf(ps
, p
);
2445 case USBDEVFS_SETCONFIGURATION
:
2446 snoop(&dev
->dev
, "%s: SETCONFIGURATION\n", __func__
);
2447 ret
= proc_setconfig(ps
, p
);
2450 case USBDEVFS_SUBMITURB
:
2451 snoop(&dev
->dev
, "%s: SUBMITURB\n", __func__
);
2452 ret
= proc_submiturb(ps
, p
);
2454 inode
->i_mtime
= current_time(inode
);
2457 #ifdef CONFIG_COMPAT
2458 case USBDEVFS_CONTROL32
:
2459 snoop(&dev
->dev
, "%s: CONTROL32\n", __func__
);
2460 ret
= proc_control_compat(ps
, p
);
2462 inode
->i_mtime
= current_time(inode
);
2465 case USBDEVFS_BULK32
:
2466 snoop(&dev
->dev
, "%s: BULK32\n", __func__
);
2467 ret
= proc_bulk_compat(ps
, p
);
2469 inode
->i_mtime
= current_time(inode
);
2472 case USBDEVFS_DISCSIGNAL32
:
2473 snoop(&dev
->dev
, "%s: DISCSIGNAL32\n", __func__
);
2474 ret
= proc_disconnectsignal_compat(ps
, p
);
2477 case USBDEVFS_SUBMITURB32
:
2478 snoop(&dev
->dev
, "%s: SUBMITURB32\n", __func__
);
2479 ret
= proc_submiturb_compat(ps
, p
);
2481 inode
->i_mtime
= current_time(inode
);
2484 case USBDEVFS_IOCTL32
:
2485 snoop(&dev
->dev
, "%s: IOCTL32\n", __func__
);
2486 ret
= proc_ioctl_compat(ps
, ptr_to_compat(p
));
2490 case USBDEVFS_DISCARDURB
:
2491 snoop(&dev
->dev
, "%s: DISCARDURB %p\n", __func__
, p
);
2492 ret
= proc_unlinkurb(ps
, p
);
2495 case USBDEVFS_DISCSIGNAL
:
2496 snoop(&dev
->dev
, "%s: DISCSIGNAL\n", __func__
);
2497 ret
= proc_disconnectsignal(ps
, p
);
2500 case USBDEVFS_CLAIMINTERFACE
:
2501 snoop(&dev
->dev
, "%s: CLAIMINTERFACE\n", __func__
);
2502 ret
= proc_claiminterface(ps
, p
);
2505 case USBDEVFS_RELEASEINTERFACE
:
2506 snoop(&dev
->dev
, "%s: RELEASEINTERFACE\n", __func__
);
2507 ret
= proc_releaseinterface(ps
, p
);
2510 case USBDEVFS_IOCTL
:
2511 snoop(&dev
->dev
, "%s: IOCTL\n", __func__
);
2512 ret
= proc_ioctl_default(ps
, p
);
2515 case USBDEVFS_CLAIM_PORT
:
2516 snoop(&dev
->dev
, "%s: CLAIM_PORT\n", __func__
);
2517 ret
= proc_claim_port(ps
, p
);
2520 case USBDEVFS_RELEASE_PORT
:
2521 snoop(&dev
->dev
, "%s: RELEASE_PORT\n", __func__
);
2522 ret
= proc_release_port(ps
, p
);
2524 case USBDEVFS_GET_CAPABILITIES
:
2525 ret
= proc_get_capabilities(ps
, p
);
2527 case USBDEVFS_DISCONNECT_CLAIM
:
2528 ret
= proc_disconnect_claim(ps
, p
);
2530 case USBDEVFS_ALLOC_STREAMS
:
2531 ret
= proc_alloc_streams(ps
, p
);
2533 case USBDEVFS_FREE_STREAMS
:
2534 ret
= proc_free_streams(ps
, p
);
2536 case USBDEVFS_DROP_PRIVILEGES
:
2537 ret
= proc_drop_privileges(ps
, p
);
2542 usb_unlock_device(dev
);
2544 inode
->i_atime
= current_time(inode
);
2548 static long usbdev_ioctl(struct file
*file
, unsigned int cmd
,
2553 ret
= usbdev_do_ioctl(file
, cmd
, (void __user
*)arg
);
2558 #ifdef CONFIG_COMPAT
2559 static long usbdev_compat_ioctl(struct file
*file
, unsigned int cmd
,
2564 ret
= usbdev_do_ioctl(file
, cmd
, compat_ptr(arg
));
2570 /* No kernel lock - fine */
2571 static unsigned int usbdev_poll(struct file
*file
,
2572 struct poll_table_struct
*wait
)
2574 struct usb_dev_state
*ps
= file
->private_data
;
2575 unsigned int mask
= 0;
2577 poll_wait(file
, &ps
->wait
, wait
);
2578 if (file
->f_mode
& FMODE_WRITE
&& !list_empty(&ps
->async_completed
))
2579 mask
|= POLLOUT
| POLLWRNORM
;
2582 if (list_empty(&ps
->list
))
2587 const struct file_operations usbdev_file_operations
= {
2588 .owner
= THIS_MODULE
,
2589 .llseek
= no_seek_end_llseek
,
2590 .read
= usbdev_read
,
2591 .poll
= usbdev_poll
,
2592 .unlocked_ioctl
= usbdev_ioctl
,
2593 #ifdef CONFIG_COMPAT
2594 .compat_ioctl
= usbdev_compat_ioctl
,
2596 .mmap
= usbdev_mmap
,
2597 .open
= usbdev_open
,
2598 .release
= usbdev_release
,
2601 static void usbdev_remove(struct usb_device
*udev
)
2603 struct usb_dev_state
*ps
;
2604 struct siginfo sinfo
;
2606 while (!list_empty(&udev
->filelist
)) {
2607 ps
= list_entry(udev
->filelist
.next
, struct usb_dev_state
, list
);
2608 destroy_all_async(ps
);
2609 wake_up_all(&ps
->wait
);
2610 list_del_init(&ps
->list
);
2611 if (ps
->discsignr
) {
2612 memset(&sinfo
, 0, sizeof(sinfo
));
2613 sinfo
.si_signo
= ps
->discsignr
;
2614 sinfo
.si_errno
= EPIPE
;
2615 sinfo
.si_code
= SI_ASYNCIO
;
2616 sinfo
.si_addr
= ps
->disccontext
;
2617 kill_pid_info_as_cred(ps
->discsignr
, &sinfo
,
2618 ps
->disc_pid
, ps
->cred
, ps
->secid
);
2623 static int usbdev_notify(struct notifier_block
*self
,
2624 unsigned long action
, void *dev
)
2627 case USB_DEVICE_ADD
:
2629 case USB_DEVICE_REMOVE
:
2636 static struct notifier_block usbdev_nb
= {
2637 .notifier_call
= usbdev_notify
,
2640 static struct cdev usb_device_cdev
;
2642 int __init
usb_devio_init(void)
2646 retval
= register_chrdev_region(USB_DEVICE_DEV
, USB_DEVICE_MAX
,
2649 printk(KERN_ERR
"Unable to register minors for usb_device\n");
2652 cdev_init(&usb_device_cdev
, &usbdev_file_operations
);
2653 retval
= cdev_add(&usb_device_cdev
, USB_DEVICE_DEV
, USB_DEVICE_MAX
);
2655 printk(KERN_ERR
"Unable to get usb_device major %d\n",
2659 usb_register_notify(&usbdev_nb
);
2664 unregister_chrdev_region(USB_DEVICE_DEV
, USB_DEVICE_MAX
);
2668 void usb_devio_cleanup(void)
2670 usb_unregister_notify(&usbdev_nb
);
2671 cdev_del(&usb_device_cdev
);
2672 unregister_chrdev_region(USB_DEVICE_DEV
, USB_DEVICE_MAX
);