1 /*****************************************************************************/
4 * devio.c -- User space communication with USB devices.
6 * Copyright (C) 1999-2000 Thomas Sailer (sailer@ife.ee.ethz.ch)
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 * This file implements the usbfs/x/y files, where
23 * x is the bus number and y the device number.
25 * It allows user space programs/"drivers" to communicate directly
26 * with USB devices without intervening kernel driver.
29 * 22.12.1999 0.1 Initial release (split from proc_usb.c)
30 * 04.01.2000 0.2 Turned into its own filesystem
31 * 30.09.2005 0.3 Fix user-triggerable oops in async URB delivery
35 /*****************************************************************************/
39 #include <linux/slab.h>
40 #include <linux/smp_lock.h>
41 #include <linux/signal.h>
42 #include <linux/poll.h>
43 #include <linux/module.h>
44 #include <linux/usb.h>
45 #include <linux/usbdevice_fs.h>
46 #include <linux/usb/hcd.h> /* for usbcore internals */
47 #include <linux/cdev.h>
48 #include <linux/notifier.h>
49 #include <linux/security.h>
50 #include <asm/uaccess.h>
51 #include <asm/byteorder.h>
52 #include <linux/moduleparam.h>
57 #define USB_DEVICE_MAX USB_MAXBUS * 128
59 /* Mutual exclusion for removal, open, and release */
60 DEFINE_MUTEX(usbfs_mutex);
63 struct list_head list; /* state list */
64 struct usb_device *dev;
66 spinlock_t lock; /* protects the async urb lists */
67 struct list_head async_pending;
68 struct list_head async_completed;
69 wait_queue_head_t wait; /* wake up if a request completed */
70 unsigned int discsignr;
72 uid_t disc_uid, disc_euid;
73 void __user *disccontext;
74 unsigned long ifclaimed;
76 u32 disabled_bulk_eps;
80 struct list_head asynclist;
86 void __user *userbuffer;
95 static int usbfs_snoop;
96 module_param(usbfs_snoop, bool, S_IRUGO | S_IWUSR);
97 MODULE_PARM_DESC(usbfs_snoop, "true to log all usbfs traffic");
99 #define snoop(dev, format, arg...) \
102 dev_info(dev , format , ## arg); \
109 #define USB_DEVICE_DEV MKDEV(USB_DEVICE_MAJOR, 0)
111 #define MAX_USBFS_BUFFER_SIZE 16384
114 static int connected(struct dev_state *ps)
116 return (!list_empty(&ps->list) &&
117 ps->dev->state != USB_STATE_NOTATTACHED);
120 static loff_t usbdev_lseek(struct file *file, loff_t offset, int orig)
124 mutex_lock(&file->f_dentry->d_inode->i_mutex);
128 file->f_pos = offset;
132 file->f_pos += offset;
140 mutex_unlock(&file->f_dentry->d_inode->i_mutex);
144 static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes,
147 struct dev_state *ps = file->private_data;
148 struct usb_device *dev = ps->dev;
155 usb_lock_device(dev);
156 if (!connected(ps)) {
159 } else if (pos < 0) {
164 if (pos < sizeof(struct usb_device_descriptor)) {
165 /* 18 bytes - fits on the stack */
166 struct usb_device_descriptor temp_desc;
168 memcpy(&temp_desc, &dev->descriptor, sizeof(dev->descriptor));
169 le16_to_cpus(&temp_desc.bcdUSB);
170 le16_to_cpus(&temp_desc.idVendor);
171 le16_to_cpus(&temp_desc.idProduct);
172 le16_to_cpus(&temp_desc.bcdDevice);
174 len = sizeof(struct usb_device_descriptor) - pos;
177 if (copy_to_user(buf, ((char *)&temp_desc) + pos, len)) {
188 pos = sizeof(struct usb_device_descriptor);
189 for (i = 0; nbytes && i < dev->descriptor.bNumConfigurations; i++) {
190 struct usb_config_descriptor *config =
191 (struct usb_config_descriptor *)dev->rawdescriptors[i];
192 unsigned int length = le16_to_cpu(config->wTotalLength);
194 if (*ppos < pos + length) {
196 /* The descriptor may claim to be longer than it
197 * really is. Here is the actual allocated length. */
199 le16_to_cpu(dev->config[i].desc.wTotalLength);
201 len = length - (*ppos - pos);
205 /* Simply don't write (skip over) unallocated parts */
206 if (alloclen > (*ppos - pos)) {
207 alloclen -= (*ppos - pos);
208 if (copy_to_user(buf,
209 dev->rawdescriptors[i] + (*ppos - pos),
210 min(len, alloclen))) {
226 usb_unlock_device(dev);
231 * async list handling
234 static struct async *alloc_async(unsigned int numisoframes)
238 as = kzalloc(sizeof(struct async), GFP_KERNEL);
241 as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL);
249 static void free_async(struct async *as)
252 kfree(as->urb->transfer_buffer);
253 kfree(as->urb->setup_packet);
254 usb_free_urb(as->urb);
258 static void async_newpending(struct async *as)
260 struct dev_state *ps = as->ps;
263 spin_lock_irqsave(&ps->lock, flags);
264 list_add_tail(&as->asynclist, &ps->async_pending);
265 spin_unlock_irqrestore(&ps->lock, flags);
268 static void async_removepending(struct async *as)
270 struct dev_state *ps = as->ps;
273 spin_lock_irqsave(&ps->lock, flags);
274 list_del_init(&as->asynclist);
275 spin_unlock_irqrestore(&ps->lock, flags);
278 static struct async *async_getcompleted(struct dev_state *ps)
281 struct async *as = NULL;
283 spin_lock_irqsave(&ps->lock, flags);
284 if (!list_empty(&ps->async_completed)) {
285 as = list_entry(ps->async_completed.next, struct async,
287 list_del_init(&as->asynclist);
289 spin_unlock_irqrestore(&ps->lock, flags);
293 static struct async *async_getpending(struct dev_state *ps,
294 void __user *userurb)
299 spin_lock_irqsave(&ps->lock, flags);
300 list_for_each_entry(as, &ps->async_pending, asynclist)
301 if (as->userurb == userurb) {
302 list_del_init(&as->asynclist);
303 spin_unlock_irqrestore(&ps->lock, flags);
306 spin_unlock_irqrestore(&ps->lock, flags);
310 static void snoop_urb(struct usb_device *udev,
311 void __user *userurb, int pipe, unsigned length,
312 int timeout_or_status, enum snoop_when when,
313 unsigned char *data, unsigned data_len)
315 static const char *types[] = {"isoc", "int", "ctrl", "bulk"};
316 static const char *dirs[] = {"out", "in"};
323 ep = usb_pipeendpoint(pipe);
324 t = types[usb_pipetype(pipe)];
325 d = dirs[!!usb_pipein(pipe)];
327 if (userurb) { /* Async */
329 dev_info(&udev->dev, "userurb %p, ep%d %s-%s, "
331 userurb, ep, t, d, length);
333 dev_info(&udev->dev, "userurb %p, ep%d %s-%s, "
334 "actual_length %u status %d\n",
335 userurb, ep, t, d, length,
339 dev_info(&udev->dev, "ep%d %s-%s, length %u, "
341 ep, t, d, length, timeout_or_status);
343 dev_info(&udev->dev, "ep%d %s-%s, actual_length %u, "
345 ep, t, d, length, timeout_or_status);
348 if (data && data_len > 0) {
349 print_hex_dump(KERN_DEBUG, "data: ", DUMP_PREFIX_NONE, 32, 1,
354 #define AS_CONTINUATION 1
357 static void cancel_bulk_urbs(struct dev_state *ps, unsigned bulk_addr)
363 /* Mark all the pending URBs that match bulk_addr, up to but not
364 * including the first one without AS_CONTINUATION. If such an
365 * URB is encountered then a new transfer has already started so
366 * the endpoint doesn't need to be disabled; otherwise it does.
368 list_for_each_entry(as, &ps->async_pending, asynclist) {
369 if (as->bulk_addr == bulk_addr) {
370 if (as->bulk_status != AS_CONTINUATION)
372 as->bulk_status = AS_UNLINK;
376 ps->disabled_bulk_eps |= (1 << bulk_addr);
378 /* Now carefully unlink all the marked pending URBs */
380 list_for_each_entry(as, &ps->async_pending, asynclist) {
381 if (as->bulk_status == AS_UNLINK) {
382 as->bulk_status = 0; /* Only once */
383 spin_unlock(&ps->lock); /* Allow completions */
384 usb_unlink_urb(as->urb);
385 spin_lock(&ps->lock);
391 static void async_completed(struct urb *urb)
393 struct async *as = urb->context;
394 struct dev_state *ps = as->ps;
395 struct siginfo sinfo;
396 struct pid *pid = NULL;
402 spin_lock(&ps->lock);
403 list_move_tail(&as->asynclist, &ps->async_completed);
404 as->status = urb->status;
407 sinfo.si_signo = as->signr;
408 sinfo.si_errno = as->status;
409 sinfo.si_code = SI_ASYNCIO;
410 sinfo.si_addr = as->userurb;
416 snoop(&urb->dev->dev, "urb complete\n");
417 snoop_urb(urb->dev, as->userurb, urb->pipe, urb->actual_length,
418 as->status, COMPLETE,
419 ((urb->transfer_flags & URB_DIR_MASK) == USB_DIR_OUT) ?
420 NULL : urb->transfer_buffer, urb->actual_length);
421 if (as->status < 0 && as->bulk_addr && as->status != -ECONNRESET &&
422 as->status != -ENOENT)
423 cancel_bulk_urbs(ps, as->bulk_addr);
424 spin_unlock(&ps->lock);
427 kill_pid_info_as_uid(sinfo.si_signo, &sinfo, pid, uid,
433 static void destroy_async(struct dev_state *ps, struct list_head *list)
438 spin_lock_irqsave(&ps->lock, flags);
439 while (!list_empty(list)) {
440 as = list_entry(list->next, struct async, asynclist);
441 list_del_init(&as->asynclist);
443 /* drop the spinlock so the completion handler can run */
444 spin_unlock_irqrestore(&ps->lock, flags);
445 usb_kill_urb(as->urb);
446 spin_lock_irqsave(&ps->lock, flags);
448 spin_unlock_irqrestore(&ps->lock, flags);
451 static void destroy_async_on_interface(struct dev_state *ps,
454 struct list_head *p, *q, hitlist;
457 INIT_LIST_HEAD(&hitlist);
458 spin_lock_irqsave(&ps->lock, flags);
459 list_for_each_safe(p, q, &ps->async_pending)
460 if (ifnum == list_entry(p, struct async, asynclist)->ifnum)
461 list_move_tail(p, &hitlist);
462 spin_unlock_irqrestore(&ps->lock, flags);
463 destroy_async(ps, &hitlist);
466 static void destroy_all_async(struct dev_state *ps)
468 destroy_async(ps, &ps->async_pending);
472 * interface claims are made only at the request of user level code,
473 * which can also release them (explicitly or by closing files).
474 * they're also undone when devices disconnect.
477 static int driver_probe(struct usb_interface *intf,
478 const struct usb_device_id *id)
483 static void driver_disconnect(struct usb_interface *intf)
485 struct dev_state *ps = usb_get_intfdata(intf);
486 unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber;
491 /* NOTE: this relies on usbcore having canceled and completed
492 * all pending I/O requests; 2.6 does that.
495 if (likely(ifnum < 8*sizeof(ps->ifclaimed)))
496 clear_bit(ifnum, &ps->ifclaimed);
498 dev_warn(&intf->dev, "interface number %u out of range\n",
501 usb_set_intfdata(intf, NULL);
503 /* force async requests to complete */
504 destroy_async_on_interface(ps, ifnum);
507 /* The following routines are merely placeholders. There is no way
508 * to inform a user task about suspend or resumes.
510 static int driver_suspend(struct usb_interface *intf, pm_message_t msg)
515 static int driver_resume(struct usb_interface *intf)
520 struct usb_driver usbfs_driver = {
522 .probe = driver_probe,
523 .disconnect = driver_disconnect,
524 .suspend = driver_suspend,
525 .resume = driver_resume,
528 static int claimintf(struct dev_state *ps, unsigned int ifnum)
530 struct usb_device *dev = ps->dev;
531 struct usb_interface *intf;
534 if (ifnum >= 8*sizeof(ps->ifclaimed))
536 /* already claimed */
537 if (test_bit(ifnum, &ps->ifclaimed))
540 intf = usb_ifnum_to_if(dev, ifnum);
544 err = usb_driver_claim_interface(&usbfs_driver, intf, ps);
546 set_bit(ifnum, &ps->ifclaimed);
550 static int releaseintf(struct dev_state *ps, unsigned int ifnum)
552 struct usb_device *dev;
553 struct usb_interface *intf;
557 if (ifnum >= 8*sizeof(ps->ifclaimed))
560 intf = usb_ifnum_to_if(dev, ifnum);
563 else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) {
564 usb_driver_release_interface(&usbfs_driver, intf);
570 static int checkintf(struct dev_state *ps, unsigned int ifnum)
572 if (ps->dev->state != USB_STATE_CONFIGURED)
573 return -EHOSTUNREACH;
574 if (ifnum >= 8*sizeof(ps->ifclaimed))
576 if (test_bit(ifnum, &ps->ifclaimed))
578 /* if not yet claimed, claim it for the driver */
579 dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim "
580 "interface %u before use\n", task_pid_nr(current),
581 current->comm, ifnum);
582 return claimintf(ps, ifnum);
585 static int findintfep(struct usb_device *dev, unsigned int ep)
587 unsigned int i, j, e;
588 struct usb_interface *intf;
589 struct usb_host_interface *alts;
590 struct usb_endpoint_descriptor *endpt;
592 if (ep & ~(USB_DIR_IN|0xf))
596 for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) {
597 intf = dev->actconfig->interface[i];
598 for (j = 0; j < intf->num_altsetting; j++) {
599 alts = &intf->altsetting[j];
600 for (e = 0; e < alts->desc.bNumEndpoints; e++) {
601 endpt = &alts->endpoint[e].desc;
602 if (endpt->bEndpointAddress == ep)
603 return alts->desc.bInterfaceNumber;
610 static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype,
615 if (ps->dev->state != USB_STATE_UNAUTHENTICATED
616 && ps->dev->state != USB_STATE_ADDRESS
617 && ps->dev->state != USB_STATE_CONFIGURED)
618 return -EHOSTUNREACH;
619 if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype))
623 switch (requesttype & USB_RECIP_MASK) {
624 case USB_RECIP_ENDPOINT:
625 ret = findintfep(ps->dev, index);
627 ret = checkintf(ps, ret);
630 case USB_RECIP_INTERFACE:
631 ret = checkintf(ps, index);
637 static int match_devt(struct device *dev, void *data)
639 return dev->devt == (dev_t) (unsigned long) data;
642 static struct usb_device *usbdev_lookup_by_devt(dev_t devt)
646 dev = bus_find_device(&usb_bus_type, NULL,
647 (void *) (unsigned long) devt, match_devt);
650 return container_of(dev, struct usb_device, dev);
656 static int usbdev_open(struct inode *inode, struct file *file)
658 struct usb_device *dev = NULL;
659 struct dev_state *ps;
660 const struct cred *cred = current_cred();
664 ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL);
670 /* Protect against simultaneous removal or release */
671 mutex_lock(&usbfs_mutex);
673 /* usbdev device-node */
674 if (imajor(inode) == USB_DEVICE_MAJOR)
675 dev = usbdev_lookup_by_devt(inode->i_rdev);
677 #ifdef CONFIG_USB_DEVICEFS
680 dev = inode->i_private;
681 if (dev && dev->usbfs_dentry &&
682 dev->usbfs_dentry->d_inode == inode)
688 mutex_unlock(&usbfs_mutex);
693 usb_lock_device(dev);
694 if (dev->state == USB_STATE_NOTATTACHED)
695 goto out_unlock_device;
697 ret = usb_autoresume_device(dev);
699 goto out_unlock_device;
703 spin_lock_init(&ps->lock);
704 INIT_LIST_HEAD(&ps->list);
705 INIT_LIST_HEAD(&ps->async_pending);
706 INIT_LIST_HEAD(&ps->async_completed);
707 init_waitqueue_head(&ps->wait);
709 ps->disc_pid = get_pid(task_pid(current));
710 ps->disc_uid = cred->uid;
711 ps->disc_euid = cred->euid;
712 ps->disccontext = NULL;
714 security_task_getsecid(current, &ps->secid);
716 list_add_tail(&ps->list, &dev->filelist);
717 file->private_data = ps;
718 usb_unlock_device(dev);
719 snoop(&dev->dev, "opened by process %d: %s\n", task_pid_nr(current),
724 usb_unlock_device(dev);
731 static int usbdev_release(struct inode *inode, struct file *file)
733 struct dev_state *ps = file->private_data;
734 struct usb_device *dev = ps->dev;
738 usb_lock_device(dev);
739 usb_hub_release_all_ports(dev, ps);
741 list_del_init(&ps->list);
743 for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed);
745 if (test_bit(ifnum, &ps->ifclaimed))
746 releaseintf(ps, ifnum);
748 destroy_all_async(ps);
749 usb_autosuspend_device(dev);
750 usb_unlock_device(dev);
752 put_pid(ps->disc_pid);
754 as = async_getcompleted(ps);
757 as = async_getcompleted(ps);
763 static int proc_control(struct dev_state *ps, void __user *arg)
765 struct usb_device *dev = ps->dev;
766 struct usbdevfs_ctrltransfer ctrl;
772 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
774 ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.wIndex);
777 wLength = ctrl.wLength; /* To suppress 64k PAGE_SIZE warning */
778 if (wLength > PAGE_SIZE)
780 tbuf = (unsigned char *)__get_free_page(GFP_KERNEL);
784 snoop(&dev->dev, "control urb: bRequestType=%02x "
785 "bRequest=%02x wValue=%04x "
786 "wIndex=%04x wLength=%04x\n",
787 ctrl.bRequestType, ctrl.bRequest,
788 __le16_to_cpup(&ctrl.wValue),
789 __le16_to_cpup(&ctrl.wIndex),
790 __le16_to_cpup(&ctrl.wLength));
791 if (ctrl.bRequestType & 0x80) {
792 if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data,
794 free_page((unsigned long)tbuf);
797 pipe = usb_rcvctrlpipe(dev, 0);
798 snoop_urb(dev, NULL, pipe, ctrl.wLength, tmo, SUBMIT, NULL, 0);
800 usb_unlock_device(dev);
801 i = usb_control_msg(dev, pipe, ctrl.bRequest,
802 ctrl.bRequestType, ctrl.wValue, ctrl.wIndex,
803 tbuf, ctrl.wLength, tmo);
804 usb_lock_device(dev);
805 snoop_urb(dev, NULL, pipe, max(i, 0), min(i, 0), COMPLETE,
807 if ((i > 0) && ctrl.wLength) {
808 if (copy_to_user(ctrl.data, tbuf, i)) {
809 free_page((unsigned long)tbuf);
815 if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) {
816 free_page((unsigned long)tbuf);
820 pipe = usb_sndctrlpipe(dev, 0);
821 snoop_urb(dev, NULL, pipe, ctrl.wLength, tmo, SUBMIT,
824 usb_unlock_device(dev);
825 i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest,
826 ctrl.bRequestType, ctrl.wValue, ctrl.wIndex,
827 tbuf, ctrl.wLength, tmo);
828 usb_lock_device(dev);
829 snoop_urb(dev, NULL, pipe, max(i, 0), min(i, 0), COMPLETE, NULL, 0);
831 free_page((unsigned long)tbuf);
832 if (i < 0 && i != -EPIPE) {
833 dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL "
834 "failed cmd %s rqt %u rq %u len %u ret %d\n",
835 current->comm, ctrl.bRequestType, ctrl.bRequest,
841 static int proc_bulk(struct dev_state *ps, void __user *arg)
843 struct usb_device *dev = ps->dev;
844 struct usbdevfs_bulktransfer bulk;
845 unsigned int tmo, len1, pipe;
850 if (copy_from_user(&bulk, arg, sizeof(bulk)))
852 ret = findintfep(ps->dev, bulk.ep);
855 ret = checkintf(ps, ret);
858 if (bulk.ep & USB_DIR_IN)
859 pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f);
861 pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f);
862 if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN)))
865 if (len1 > MAX_USBFS_BUFFER_SIZE)
867 if (!(tbuf = kmalloc(len1, GFP_KERNEL)))
870 if (bulk.ep & 0x80) {
871 if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) {
875 snoop_urb(dev, NULL, pipe, len1, tmo, SUBMIT, NULL, 0);
877 usb_unlock_device(dev);
878 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
879 usb_lock_device(dev);
880 snoop_urb(dev, NULL, pipe, len2, i, COMPLETE, tbuf, len2);
883 if (copy_to_user(bulk.data, tbuf, len2)) {
890 if (copy_from_user(tbuf, bulk.data, len1)) {
895 snoop_urb(dev, NULL, pipe, len1, tmo, SUBMIT, tbuf, len1);
897 usb_unlock_device(dev);
898 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
899 usb_lock_device(dev);
900 snoop_urb(dev, NULL, pipe, len2, i, COMPLETE, NULL, 0);
908 static int proc_resetep(struct dev_state *ps, void __user *arg)
913 if (get_user(ep, (unsigned int __user *)arg))
915 ret = findintfep(ps->dev, ep);
918 ret = checkintf(ps, ret);
921 usb_reset_endpoint(ps->dev, ep);
925 static int proc_clearhalt(struct dev_state *ps, void __user *arg)
931 if (get_user(ep, (unsigned int __user *)arg))
933 ret = findintfep(ps->dev, ep);
936 ret = checkintf(ps, ret);
940 pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f);
942 pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f);
944 return usb_clear_halt(ps->dev, pipe);
947 static int proc_getdriver(struct dev_state *ps, void __user *arg)
949 struct usbdevfs_getdriver gd;
950 struct usb_interface *intf;
953 if (copy_from_user(&gd, arg, sizeof(gd)))
955 intf = usb_ifnum_to_if(ps->dev, gd.interface);
956 if (!intf || !intf->dev.driver)
959 strncpy(gd.driver, intf->dev.driver->name,
961 ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0);
966 static int proc_connectinfo(struct dev_state *ps, void __user *arg)
968 struct usbdevfs_connectinfo ci = {
969 .devnum = ps->dev->devnum,
970 .slow = ps->dev->speed == USB_SPEED_LOW
973 if (copy_to_user(arg, &ci, sizeof(ci)))
978 static int proc_resetdevice(struct dev_state *ps)
980 return usb_reset_device(ps->dev);
983 static int proc_setintf(struct dev_state *ps, void __user *arg)
985 struct usbdevfs_setinterface setintf;
988 if (copy_from_user(&setintf, arg, sizeof(setintf)))
990 if ((ret = checkintf(ps, setintf.interface)))
992 return usb_set_interface(ps->dev, setintf.interface,
996 static int proc_setconfig(struct dev_state *ps, void __user *arg)
1000 struct usb_host_config *actconfig;
1002 if (get_user(u, (int __user *)arg))
1005 actconfig = ps->dev->actconfig;
1007 /* Don't touch the device if any interfaces are claimed.
1008 * It could interfere with other drivers' operations, and if
1009 * an interface is claimed by usbfs it could easily deadlock.
1014 for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) {
1015 if (usb_interface_claimed(actconfig->interface[i])) {
1016 dev_warn(&ps->dev->dev,
1017 "usbfs: interface %d claimed by %s "
1018 "while '%s' sets config #%d\n",
1019 actconfig->interface[i]
1021 ->desc.bInterfaceNumber,
1022 actconfig->interface[i]
1031 /* SET_CONFIGURATION is often abused as a "cheap" driver reset,
1032 * so avoid usb_set_configuration()'s kick to sysfs
1035 if (actconfig && actconfig->desc.bConfigurationValue == u)
1036 status = usb_reset_configuration(ps->dev);
1038 status = usb_set_configuration(ps->dev, u);
1044 static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
1045 struct usbdevfs_iso_packet_desc __user *iso_frame_desc,
1048 struct usbdevfs_iso_packet_desc *isopkt = NULL;
1049 struct usb_host_endpoint *ep;
1051 struct usb_ctrlrequest *dr = NULL;
1052 const struct cred *cred = current_cred();
1053 unsigned int u, totlen, isofrmlen;
1054 int ret, ifnum = -1;
1057 if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP |
1058 USBDEVFS_URB_SHORT_NOT_OK |
1059 USBDEVFS_URB_BULK_CONTINUATION |
1060 USBDEVFS_URB_NO_FSBR |
1061 USBDEVFS_URB_ZERO_PACKET |
1062 USBDEVFS_URB_NO_INTERRUPT))
1064 if (uurb->buffer_length > 0 && !uurb->buffer)
1066 if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL &&
1067 (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) {
1068 ifnum = findintfep(ps->dev, uurb->endpoint);
1071 ret = checkintf(ps, ifnum);
1075 if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0) {
1077 ep = ps->dev->ep_in[uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
1080 ep = ps->dev->ep_out[uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
1084 switch(uurb->type) {
1085 case USBDEVFS_URB_TYPE_CONTROL:
1086 if (!usb_endpoint_xfer_control(&ep->desc))
1088 /* min 8 byte setup packet,
1089 * max 8 byte setup plus an arbitrary data stage */
1090 if (uurb->buffer_length < 8 ||
1091 uurb->buffer_length > (8 + MAX_USBFS_BUFFER_SIZE))
1093 dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL);
1096 if (copy_from_user(dr, uurb->buffer, 8)) {
1100 if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) {
1104 ret = check_ctrlrecip(ps, dr->bRequestType,
1105 le16_to_cpup(&dr->wIndex));
1110 uurb->number_of_packets = 0;
1111 uurb->buffer_length = le16_to_cpup(&dr->wLength);
1113 if ((dr->bRequestType & USB_DIR_IN) && uurb->buffer_length) {
1115 uurb->endpoint |= USB_DIR_IN;
1118 uurb->endpoint &= ~USB_DIR_IN;
1120 snoop(&ps->dev->dev, "control urb: bRequestType=%02x "
1121 "bRequest=%02x wValue=%04x "
1122 "wIndex=%04x wLength=%04x\n",
1123 dr->bRequestType, dr->bRequest,
1124 __le16_to_cpup(&dr->wValue),
1125 __le16_to_cpup(&dr->wIndex),
1126 __le16_to_cpup(&dr->wLength));
1129 case USBDEVFS_URB_TYPE_BULK:
1130 switch (usb_endpoint_type(&ep->desc)) {
1131 case USB_ENDPOINT_XFER_CONTROL:
1132 case USB_ENDPOINT_XFER_ISOC:
1134 case USB_ENDPOINT_XFER_INT:
1135 /* allow single-shot interrupt transfers */
1136 uurb->type = USBDEVFS_URB_TYPE_INTERRUPT;
1139 uurb->number_of_packets = 0;
1140 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE)
1144 case USBDEVFS_URB_TYPE_INTERRUPT:
1145 if (!usb_endpoint_xfer_int(&ep->desc))
1148 uurb->number_of_packets = 0;
1149 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE)
1153 case USBDEVFS_URB_TYPE_ISO:
1154 /* arbitrary limit */
1155 if (uurb->number_of_packets < 1 ||
1156 uurb->number_of_packets > 128)
1158 if (!usb_endpoint_xfer_isoc(&ep->desc))
1160 isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) *
1161 uurb->number_of_packets;
1162 if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL)))
1164 if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) {
1168 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
1170 * sufficient for USB 2.0 high-bandwidth iso */
1171 if (isopkt[u].length > 8192) {
1175 totlen += isopkt[u].length;
1177 /* 3072 * 64 microframes */
1178 if (totlen > 196608) {
1182 uurb->buffer_length = totlen;
1188 if (uurb->buffer_length > 0 &&
1189 !access_ok(is_in ? VERIFY_WRITE : VERIFY_READ,
1190 uurb->buffer, uurb->buffer_length)) {
1195 as = alloc_async(uurb->number_of_packets);
1201 if (uurb->buffer_length > 0) {
1202 as->urb->transfer_buffer = kmalloc(uurb->buffer_length,
1204 if (!as->urb->transfer_buffer) {
1210 /* Isochronous input data may end up being discontiguous
1211 * if some of the packets are short. Clear the buffer so
1212 * that the gaps don't leak kernel data to userspace.
1214 if (is_in && uurb->type == USBDEVFS_URB_TYPE_ISO)
1215 memset(as->urb->transfer_buffer, 0,
1216 uurb->buffer_length);
1218 as->urb->dev = ps->dev;
1219 as->urb->pipe = (uurb->type << 30) |
1220 __create_pipe(ps->dev, uurb->endpoint & 0xf) |
1221 (uurb->endpoint & USB_DIR_IN);
1223 /* This tedious sequence is necessary because the URB_* flags
1224 * are internal to the kernel and subject to change, whereas
1225 * the USBDEVFS_URB_* flags are a user API and must not be changed.
1227 u = (is_in ? URB_DIR_IN : URB_DIR_OUT);
1228 if (uurb->flags & USBDEVFS_URB_ISO_ASAP)
1230 if (uurb->flags & USBDEVFS_URB_SHORT_NOT_OK)
1231 u |= URB_SHORT_NOT_OK;
1232 if (uurb->flags & USBDEVFS_URB_NO_FSBR)
1234 if (uurb->flags & USBDEVFS_URB_ZERO_PACKET)
1235 u |= URB_ZERO_PACKET;
1236 if (uurb->flags & USBDEVFS_URB_NO_INTERRUPT)
1237 u |= URB_NO_INTERRUPT;
1238 as->urb->transfer_flags = u;
1240 as->urb->transfer_buffer_length = uurb->buffer_length;
1241 as->urb->setup_packet = (unsigned char *)dr;
1242 as->urb->start_frame = uurb->start_frame;
1243 as->urb->number_of_packets = uurb->number_of_packets;
1244 if (uurb->type == USBDEVFS_URB_TYPE_ISO ||
1245 ps->dev->speed == USB_SPEED_HIGH)
1246 as->urb->interval = 1 << min(15, ep->desc.bInterval - 1);
1248 as->urb->interval = ep->desc.bInterval;
1249 as->urb->context = as;
1250 as->urb->complete = async_completed;
1251 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
1252 as->urb->iso_frame_desc[u].offset = totlen;
1253 as->urb->iso_frame_desc[u].length = isopkt[u].length;
1254 totlen += isopkt[u].length;
1259 if (is_in && uurb->buffer_length > 0)
1260 as->userbuffer = uurb->buffer;
1262 as->userbuffer = NULL;
1263 as->signr = uurb->signr;
1265 as->pid = get_pid(task_pid(current));
1266 as->uid = cred->uid;
1267 as->euid = cred->euid;
1268 security_task_getsecid(current, &as->secid);
1269 if (!is_in && uurb->buffer_length > 0) {
1270 if (copy_from_user(as->urb->transfer_buffer, uurb->buffer,
1271 uurb->buffer_length)) {
1276 snoop_urb(ps->dev, as->userurb, as->urb->pipe,
1277 as->urb->transfer_buffer_length, 0, SUBMIT,
1278 is_in ? NULL : as->urb->transfer_buffer,
1279 uurb->buffer_length);
1280 async_newpending(as);
1282 if (usb_endpoint_xfer_bulk(&ep->desc)) {
1283 spin_lock_irq(&ps->lock);
1285 /* Not exactly the endpoint address; the direction bit is
1286 * shifted to the 0x10 position so that the value will be
1289 as->bulk_addr = usb_endpoint_num(&ep->desc) |
1290 ((ep->desc.bEndpointAddress & USB_ENDPOINT_DIR_MASK)
1293 /* If this bulk URB is the start of a new transfer, re-enable
1294 * the endpoint. Otherwise mark it as a continuation URB.
1296 if (uurb->flags & USBDEVFS_URB_BULK_CONTINUATION)
1297 as->bulk_status = AS_CONTINUATION;
1299 ps->disabled_bulk_eps &= ~(1 << as->bulk_addr);
1301 /* Don't accept continuation URBs if the endpoint is
1302 * disabled because of an earlier error.
1304 if (ps->disabled_bulk_eps & (1 << as->bulk_addr))
1307 ret = usb_submit_urb(as->urb, GFP_ATOMIC);
1308 spin_unlock_irq(&ps->lock);
1310 ret = usb_submit_urb(as->urb, GFP_KERNEL);
1314 dev_printk(KERN_DEBUG, &ps->dev->dev,
1315 "usbfs: usb_submit_urb returned %d\n", ret);
1316 snoop_urb(ps->dev, as->userurb, as->urb->pipe,
1317 0, ret, COMPLETE, NULL, 0);
1318 async_removepending(as);
1325 static int proc_submiturb(struct dev_state *ps, void __user *arg)
1327 struct usbdevfs_urb uurb;
1329 if (copy_from_user(&uurb, arg, sizeof(uurb)))
1332 return proc_do_submiturb(ps, &uurb,
1333 (((struct usbdevfs_urb __user *)arg)->iso_frame_desc),
1337 static int proc_unlinkurb(struct dev_state *ps, void __user *arg)
1341 as = async_getpending(ps, arg);
1344 usb_kill_urb(as->urb);
1348 static int processcompl(struct async *as, void __user * __user *arg)
1350 struct urb *urb = as->urb;
1351 struct usbdevfs_urb __user *userurb = as->userurb;
1352 void __user *addr = as->userurb;
1355 if (as->userbuffer && urb->actual_length) {
1356 if (urb->number_of_packets > 0) /* Isochronous */
1357 i = urb->transfer_buffer_length;
1359 i = urb->actual_length;
1360 if (copy_to_user(as->userbuffer, urb->transfer_buffer, i))
1363 if (put_user(as->status, &userurb->status))
1365 if (put_user(urb->actual_length, &userurb->actual_length))
1367 if (put_user(urb->error_count, &userurb->error_count))
1370 if (usb_endpoint_xfer_isoc(&urb->ep->desc)) {
1371 for (i = 0; i < urb->number_of_packets; i++) {
1372 if (put_user(urb->iso_frame_desc[i].actual_length,
1373 &userurb->iso_frame_desc[i].actual_length))
1375 if (put_user(urb->iso_frame_desc[i].status,
1376 &userurb->iso_frame_desc[i].status))
1381 if (put_user(addr, (void __user * __user *)arg))
1389 static struct async *reap_as(struct dev_state *ps)
1391 DECLARE_WAITQUEUE(wait, current);
1392 struct async *as = NULL;
1393 struct usb_device *dev = ps->dev;
1395 add_wait_queue(&ps->wait, &wait);
1397 __set_current_state(TASK_INTERRUPTIBLE);
1398 as = async_getcompleted(ps);
1401 if (signal_pending(current))
1403 usb_unlock_device(dev);
1405 usb_lock_device(dev);
1407 remove_wait_queue(&ps->wait, &wait);
1408 set_current_state(TASK_RUNNING);
1412 static int proc_reapurb(struct dev_state *ps, void __user *arg)
1414 struct async *as = reap_as(ps);
1416 int retval = processcompl(as, (void __user * __user *)arg);
1420 if (signal_pending(current))
1425 static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg)
1430 as = async_getcompleted(ps);
1433 retval = processcompl(as, (void __user * __user *)arg);
1439 #ifdef CONFIG_COMPAT
1440 static int proc_control_compat(struct dev_state *ps,
1441 struct usbdevfs_ctrltransfer32 __user *p32)
1443 struct usbdevfs_ctrltransfer __user *p;
1445 p = compat_alloc_user_space(sizeof(*p));
1446 if (copy_in_user(p, p32, (sizeof(*p32) - sizeof(compat_caddr_t))) ||
1447 get_user(udata, &p32->data) ||
1448 put_user(compat_ptr(udata), &p->data))
1450 return proc_control(ps, p);
1453 static int proc_bulk_compat(struct dev_state *ps,
1454 struct usbdevfs_bulktransfer32 __user *p32)
1456 struct usbdevfs_bulktransfer __user *p;
1458 compat_caddr_t addr;
1460 p = compat_alloc_user_space(sizeof(*p));
1462 if (get_user(n, &p32->ep) || put_user(n, &p->ep) ||
1463 get_user(n, &p32->len) || put_user(n, &p->len) ||
1464 get_user(n, &p32->timeout) || put_user(n, &p->timeout) ||
1465 get_user(addr, &p32->data) || put_user(compat_ptr(addr), &p->data))
1468 return proc_bulk(ps, p);
1470 static int proc_disconnectsignal_compat(struct dev_state *ps, void __user *arg)
1472 struct usbdevfs_disconnectsignal32 ds;
1474 if (copy_from_user(&ds, arg, sizeof(ds)))
1476 ps->discsignr = ds.signr;
1477 ps->disccontext = compat_ptr(ds.context);
1481 static int get_urb32(struct usbdevfs_urb *kurb,
1482 struct usbdevfs_urb32 __user *uurb)
1485 if (!access_ok(VERIFY_READ, uurb, sizeof(*uurb)) ||
1486 __get_user(kurb->type, &uurb->type) ||
1487 __get_user(kurb->endpoint, &uurb->endpoint) ||
1488 __get_user(kurb->status, &uurb->status) ||
1489 __get_user(kurb->flags, &uurb->flags) ||
1490 __get_user(kurb->buffer_length, &uurb->buffer_length) ||
1491 __get_user(kurb->actual_length, &uurb->actual_length) ||
1492 __get_user(kurb->start_frame, &uurb->start_frame) ||
1493 __get_user(kurb->number_of_packets, &uurb->number_of_packets) ||
1494 __get_user(kurb->error_count, &uurb->error_count) ||
1495 __get_user(kurb->signr, &uurb->signr))
1498 if (__get_user(uptr, &uurb->buffer))
1500 kurb->buffer = compat_ptr(uptr);
1501 if (__get_user(uptr, &uurb->usercontext))
1503 kurb->usercontext = compat_ptr(uptr);
1508 static int proc_submiturb_compat(struct dev_state *ps, void __user *arg)
1510 struct usbdevfs_urb uurb;
1512 if (get_urb32(&uurb, (struct usbdevfs_urb32 __user *)arg))
1515 return proc_do_submiturb(ps, &uurb,
1516 ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc,
1520 static int processcompl_compat(struct async *as, void __user * __user *arg)
1522 struct urb *urb = as->urb;
1523 struct usbdevfs_urb32 __user *userurb = as->userurb;
1524 void __user *addr = as->userurb;
1527 if (as->userbuffer && urb->actual_length)
1528 if (copy_to_user(as->userbuffer, urb->transfer_buffer,
1529 urb->actual_length))
1531 if (put_user(as->status, &userurb->status))
1533 if (put_user(urb->actual_length, &userurb->actual_length))
1535 if (put_user(urb->error_count, &userurb->error_count))
1538 if (usb_endpoint_xfer_isoc(&urb->ep->desc)) {
1539 for (i = 0; i < urb->number_of_packets; i++) {
1540 if (put_user(urb->iso_frame_desc[i].actual_length,
1541 &userurb->iso_frame_desc[i].actual_length))
1543 if (put_user(urb->iso_frame_desc[i].status,
1544 &userurb->iso_frame_desc[i].status))
1549 if (put_user(ptr_to_compat(addr), (u32 __user *)arg))
1554 static int proc_reapurb_compat(struct dev_state *ps, void __user *arg)
1556 struct async *as = reap_as(ps);
1558 int retval = processcompl_compat(as, (void __user * __user *)arg);
1562 if (signal_pending(current))
1567 static int proc_reapurbnonblock_compat(struct dev_state *ps, void __user *arg)
1573 as = async_getcompleted(ps);
1575 retval = processcompl_compat(as, (void __user * __user *)arg);
1584 static int proc_disconnectsignal(struct dev_state *ps, void __user *arg)
1586 struct usbdevfs_disconnectsignal ds;
1588 if (copy_from_user(&ds, arg, sizeof(ds)))
1590 ps->discsignr = ds.signr;
1591 ps->disccontext = ds.context;
1595 static int proc_claiminterface(struct dev_state *ps, void __user *arg)
1599 if (get_user(ifnum, (unsigned int __user *)arg))
1601 return claimintf(ps, ifnum);
1604 static int proc_releaseinterface(struct dev_state *ps, void __user *arg)
1609 if (get_user(ifnum, (unsigned int __user *)arg))
1611 if ((ret = releaseintf(ps, ifnum)) < 0)
1613 destroy_async_on_interface (ps, ifnum);
1617 static int proc_ioctl(struct dev_state *ps, struct usbdevfs_ioctl *ctl)
1622 struct usb_interface *intf = NULL;
1623 struct usb_driver *driver = NULL;
1626 if ((size = _IOC_SIZE(ctl->ioctl_code)) > 0) {
1627 if ((buf = kmalloc(size, GFP_KERNEL)) == NULL)
1629 if ((_IOC_DIR(ctl->ioctl_code) & _IOC_WRITE)) {
1630 if (copy_from_user(buf, ctl->data, size)) {
1635 memset(buf, 0, size);
1639 if (!connected(ps)) {
1644 if (ps->dev->state != USB_STATE_CONFIGURED)
1645 retval = -EHOSTUNREACH;
1646 else if (!(intf = usb_ifnum_to_if(ps->dev, ctl->ifno)))
1648 else switch (ctl->ioctl_code) {
1650 /* disconnect kernel driver from interface */
1651 case USBDEVFS_DISCONNECT:
1652 if (intf->dev.driver) {
1653 driver = to_usb_driver(intf->dev.driver);
1654 dev_dbg(&intf->dev, "disconnect by usbfs\n");
1655 usb_driver_release_interface(driver, intf);
1660 /* let kernel drivers try to (re)bind to the interface */
1661 case USBDEVFS_CONNECT:
1662 if (!intf->dev.driver)
1663 retval = device_attach(&intf->dev);
1668 /* talk directly to the interface's driver */
1670 if (intf->dev.driver)
1671 driver = to_usb_driver(intf->dev.driver);
1672 if (driver == NULL || driver->unlocked_ioctl == NULL) {
1675 retval = driver->unlocked_ioctl(intf, ctl->ioctl_code, buf);
1676 if (retval == -ENOIOCTLCMD)
1681 /* cleanup and return */
1683 && (_IOC_DIR(ctl->ioctl_code) & _IOC_READ) != 0
1685 && copy_to_user(ctl->data, buf, size) != 0)
1692 static int proc_ioctl_default(struct dev_state *ps, void __user *arg)
1694 struct usbdevfs_ioctl ctrl;
1696 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
1698 return proc_ioctl(ps, &ctrl);
1701 #ifdef CONFIG_COMPAT
1702 static int proc_ioctl_compat(struct dev_state *ps, compat_uptr_t arg)
1704 struct usbdevfs_ioctl32 __user *uioc;
1705 struct usbdevfs_ioctl ctrl;
1708 uioc = compat_ptr((long)arg);
1709 if (!access_ok(VERIFY_READ, uioc, sizeof(*uioc)) ||
1710 __get_user(ctrl.ifno, &uioc->ifno) ||
1711 __get_user(ctrl.ioctl_code, &uioc->ioctl_code) ||
1712 __get_user(udata, &uioc->data))
1714 ctrl.data = compat_ptr(udata);
1716 return proc_ioctl(ps, &ctrl);
1720 static int proc_claim_port(struct dev_state *ps, void __user *arg)
1725 if (get_user(portnum, (unsigned __user *) arg))
1727 rc = usb_hub_claim_port(ps->dev, portnum, ps);
1729 snoop(&ps->dev->dev, "port %d claimed by process %d: %s\n",
1730 portnum, task_pid_nr(current), current->comm);
1734 static int proc_release_port(struct dev_state *ps, void __user *arg)
1738 if (get_user(portnum, (unsigned __user *) arg))
1740 return usb_hub_release_port(ps->dev, portnum, ps);
1744 * NOTE: All requests here that have interface numbers as parameters
1745 * are assuming that somehow the configuration has been prevented from
1746 * changing. But there's no mechanism to ensure that...
1748 static long usbdev_do_ioctl(struct file *file, unsigned int cmd,
1751 struct dev_state *ps = file->private_data;
1752 struct inode *inode = file->f_path.dentry->d_inode;
1753 struct usb_device *dev = ps->dev;
1756 if (!(file->f_mode & FMODE_WRITE))
1759 usb_lock_device(dev);
1760 if (!connected(ps)) {
1761 usb_unlock_device(dev);
1766 case USBDEVFS_CONTROL:
1767 snoop(&dev->dev, "%s: CONTROL\n", __func__);
1768 ret = proc_control(ps, p);
1770 inode->i_mtime = CURRENT_TIME;
1774 snoop(&dev->dev, "%s: BULK\n", __func__);
1775 ret = proc_bulk(ps, p);
1777 inode->i_mtime = CURRENT_TIME;
1780 case USBDEVFS_RESETEP:
1781 snoop(&dev->dev, "%s: RESETEP\n", __func__);
1782 ret = proc_resetep(ps, p);
1784 inode->i_mtime = CURRENT_TIME;
1787 case USBDEVFS_RESET:
1788 snoop(&dev->dev, "%s: RESET\n", __func__);
1789 ret = proc_resetdevice(ps);
1792 case USBDEVFS_CLEAR_HALT:
1793 snoop(&dev->dev, "%s: CLEAR_HALT\n", __func__);
1794 ret = proc_clearhalt(ps, p);
1796 inode->i_mtime = CURRENT_TIME;
1799 case USBDEVFS_GETDRIVER:
1800 snoop(&dev->dev, "%s: GETDRIVER\n", __func__);
1801 ret = proc_getdriver(ps, p);
1804 case USBDEVFS_CONNECTINFO:
1805 snoop(&dev->dev, "%s: CONNECTINFO\n", __func__);
1806 ret = proc_connectinfo(ps, p);
1809 case USBDEVFS_SETINTERFACE:
1810 snoop(&dev->dev, "%s: SETINTERFACE\n", __func__);
1811 ret = proc_setintf(ps, p);
1814 case USBDEVFS_SETCONFIGURATION:
1815 snoop(&dev->dev, "%s: SETCONFIGURATION\n", __func__);
1816 ret = proc_setconfig(ps, p);
1819 case USBDEVFS_SUBMITURB:
1820 snoop(&dev->dev, "%s: SUBMITURB\n", __func__);
1821 ret = proc_submiturb(ps, p);
1823 inode->i_mtime = CURRENT_TIME;
1826 #ifdef CONFIG_COMPAT
1827 case USBDEVFS_CONTROL32:
1828 snoop(&dev->dev, "%s: CONTROL32\n", __func__);
1829 ret = proc_control_compat(ps, p);
1831 inode->i_mtime = CURRENT_TIME;
1834 case USBDEVFS_BULK32:
1835 snoop(&dev->dev, "%s: BULK32\n", __func__);
1836 ret = proc_bulk_compat(ps, p);
1838 inode->i_mtime = CURRENT_TIME;
1841 case USBDEVFS_DISCSIGNAL32:
1842 snoop(&dev->dev, "%s: DISCSIGNAL32\n", __func__);
1843 ret = proc_disconnectsignal_compat(ps, p);
1846 case USBDEVFS_SUBMITURB32:
1847 snoop(&dev->dev, "%s: SUBMITURB32\n", __func__);
1848 ret = proc_submiturb_compat(ps, p);
1850 inode->i_mtime = CURRENT_TIME;
1853 case USBDEVFS_REAPURB32:
1854 snoop(&dev->dev, "%s: REAPURB32\n", __func__);
1855 ret = proc_reapurb_compat(ps, p);
1858 case USBDEVFS_REAPURBNDELAY32:
1859 snoop(&dev->dev, "%s: REAPURBNDELAY32\n", __func__);
1860 ret = proc_reapurbnonblock_compat(ps, p);
1863 case USBDEVFS_IOCTL32:
1864 snoop(&dev->dev, "%s: IOCTL32\n", __func__);
1865 ret = proc_ioctl_compat(ps, ptr_to_compat(p));
1869 case USBDEVFS_DISCARDURB:
1870 snoop(&dev->dev, "%s: DISCARDURB\n", __func__);
1871 ret = proc_unlinkurb(ps, p);
1874 case USBDEVFS_REAPURB:
1875 snoop(&dev->dev, "%s: REAPURB\n", __func__);
1876 ret = proc_reapurb(ps, p);
1879 case USBDEVFS_REAPURBNDELAY:
1880 snoop(&dev->dev, "%s: REAPURBNDELAY\n", __func__);
1881 ret = proc_reapurbnonblock(ps, p);
1884 case USBDEVFS_DISCSIGNAL:
1885 snoop(&dev->dev, "%s: DISCSIGNAL\n", __func__);
1886 ret = proc_disconnectsignal(ps, p);
1889 case USBDEVFS_CLAIMINTERFACE:
1890 snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __func__);
1891 ret = proc_claiminterface(ps, p);
1894 case USBDEVFS_RELEASEINTERFACE:
1895 snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __func__);
1896 ret = proc_releaseinterface(ps, p);
1899 case USBDEVFS_IOCTL:
1900 snoop(&dev->dev, "%s: IOCTL\n", __func__);
1901 ret = proc_ioctl_default(ps, p);
1904 case USBDEVFS_CLAIM_PORT:
1905 snoop(&dev->dev, "%s: CLAIM_PORT\n", __func__);
1906 ret = proc_claim_port(ps, p);
1909 case USBDEVFS_RELEASE_PORT:
1910 snoop(&dev->dev, "%s: RELEASE_PORT\n", __func__);
1911 ret = proc_release_port(ps, p);
1914 usb_unlock_device(dev);
1916 inode->i_atime = CURRENT_TIME;
1920 static long usbdev_ioctl(struct file *file, unsigned int cmd,
1925 ret = usbdev_do_ioctl(file, cmd, (void __user *)arg);
1930 #ifdef CONFIG_COMPAT
1931 static long usbdev_compat_ioctl(struct file *file, unsigned int cmd,
1936 ret = usbdev_do_ioctl(file, cmd, compat_ptr(arg));
1942 /* No kernel lock - fine */
1943 static unsigned int usbdev_poll(struct file *file,
1944 struct poll_table_struct *wait)
1946 struct dev_state *ps = file->private_data;
1947 unsigned int mask = 0;
1949 poll_wait(file, &ps->wait, wait);
1950 if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed))
1951 mask |= POLLOUT | POLLWRNORM;
1953 mask |= POLLERR | POLLHUP;
1957 const struct file_operations usbdev_file_operations = {
1958 .owner = THIS_MODULE,
1959 .llseek = usbdev_lseek,
1960 .read = usbdev_read,
1961 .poll = usbdev_poll,
1962 .unlocked_ioctl = usbdev_ioctl,
1963 #ifdef CONFIG_COMPAT
1964 .compat_ioctl = usbdev_compat_ioctl,
1966 .open = usbdev_open,
1967 .release = usbdev_release,
1970 static void usbdev_remove(struct usb_device *udev)
1972 struct dev_state *ps;
1973 struct siginfo sinfo;
1975 while (!list_empty(&udev->filelist)) {
1976 ps = list_entry(udev->filelist.next, struct dev_state, list);
1977 destroy_all_async(ps);
1978 wake_up_all(&ps->wait);
1979 list_del_init(&ps->list);
1980 if (ps->discsignr) {
1981 sinfo.si_signo = ps->discsignr;
1982 sinfo.si_errno = EPIPE;
1983 sinfo.si_code = SI_ASYNCIO;
1984 sinfo.si_addr = ps->disccontext;
1985 kill_pid_info_as_uid(ps->discsignr, &sinfo,
1986 ps->disc_pid, ps->disc_uid,
1987 ps->disc_euid, ps->secid);
1992 #ifdef CONFIG_USB_DEVICE_CLASS
1993 static struct class *usb_classdev_class;
1995 static int usb_classdev_add(struct usb_device *dev)
1997 struct device *cldev;
1999 cldev = device_create(usb_classdev_class, &dev->dev, dev->dev.devt,
2000 NULL, "usbdev%d.%d", dev->bus->busnum,
2003 return PTR_ERR(cldev);
2004 dev->usb_classdev = cldev;
2008 static void usb_classdev_remove(struct usb_device *dev)
2010 if (dev->usb_classdev)
2011 device_unregister(dev->usb_classdev);
2015 #define usb_classdev_add(dev) 0
2016 #define usb_classdev_remove(dev) do {} while (0)
2020 static int usbdev_notify(struct notifier_block *self,
2021 unsigned long action, void *dev)
2024 case USB_DEVICE_ADD:
2025 if (usb_classdev_add(dev))
2028 case USB_DEVICE_REMOVE:
2029 usb_classdev_remove(dev);
2036 static struct notifier_block usbdev_nb = {
2037 .notifier_call = usbdev_notify,
2040 static struct cdev usb_device_cdev;
2042 int __init usb_devio_init(void)
2046 retval = register_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX,
2049 printk(KERN_ERR "Unable to register minors for usb_device\n");
2052 cdev_init(&usb_device_cdev, &usbdev_file_operations);
2053 retval = cdev_add(&usb_device_cdev, USB_DEVICE_DEV, USB_DEVICE_MAX);
2055 printk(KERN_ERR "Unable to get usb_device major %d\n",
2059 #ifdef CONFIG_USB_DEVICE_CLASS
2060 usb_classdev_class = class_create(THIS_MODULE, "usb_device");
2061 if (IS_ERR(usb_classdev_class)) {
2062 printk(KERN_ERR "Unable to register usb_device class\n");
2063 retval = PTR_ERR(usb_classdev_class);
2064 cdev_del(&usb_device_cdev);
2065 usb_classdev_class = NULL;
2068 /* devices of this class shadow the major:minor of their parent
2069 * device, so clear ->dev_kobj to prevent adding duplicate entries
2072 usb_classdev_class->dev_kobj = NULL;
2074 usb_register_notify(&usbdev_nb);
2079 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
2083 void usb_devio_cleanup(void)
2085 usb_unregister_notify(&usbdev_nb);
2086 #ifdef CONFIG_USB_DEVICE_CLASS
2087 class_destroy(usb_classdev_class);
2089 cdev_del(&usb_device_cdev);
2090 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);