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/cdev.h>
47 #include <linux/notifier.h>
48 #include <linux/security.h>
49 #include <asm/uaccess.h>
50 #include <asm/byteorder.h>
51 #include <linux/moduleparam.h>
53 #include "hcd.h" /* for usbcore internals */
58 #define USB_DEVICE_MAX USB_MAXBUS * 128
60 /* Mutual exclusion for removal, open, and release */
61 DEFINE_MUTEX(usbfs_mutex);
64 struct list_head list; /* state list */
65 struct usb_device *dev;
67 spinlock_t lock; /* protects the async urb lists */
68 struct list_head async_pending;
69 struct list_head async_completed;
70 wait_queue_head_t wait; /* wake up if a request completed */
71 unsigned int discsignr;
73 uid_t disc_uid, disc_euid;
74 void __user *disccontext;
75 unsigned long ifclaimed;
77 u32 disabled_bulk_eps;
81 struct list_head asynclist;
87 void __user *userbuffer;
96 static int usbfs_snoop;
97 module_param(usbfs_snoop, bool, S_IRUGO | S_IWUSR);
98 MODULE_PARM_DESC(usbfs_snoop, "true to log all usbfs traffic");
100 #define snoop(dev, format, arg...) \
103 dev_info(dev , format , ## arg); \
110 #define USB_DEVICE_DEV MKDEV(USB_DEVICE_MAJOR, 0)
112 #define MAX_USBFS_BUFFER_SIZE 16384
115 static int connected(struct dev_state *ps)
117 return (!list_empty(&ps->list) &&
118 ps->dev->state != USB_STATE_NOTATTACHED);
121 static loff_t usbdev_lseek(struct file *file, loff_t offset, int orig)
125 mutex_lock(&file->f_dentry->d_inode->i_mutex);
129 file->f_pos = offset;
133 file->f_pos += offset;
141 mutex_unlock(&file->f_dentry->d_inode->i_mutex);
145 static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes,
148 struct dev_state *ps = file->private_data;
149 struct usb_device *dev = ps->dev;
156 usb_lock_device(dev);
157 if (!connected(ps)) {
160 } else if (pos < 0) {
165 if (pos < sizeof(struct usb_device_descriptor)) {
166 /* 18 bytes - fits on the stack */
167 struct usb_device_descriptor temp_desc;
169 memcpy(&temp_desc, &dev->descriptor, sizeof(dev->descriptor));
170 le16_to_cpus(&temp_desc.bcdUSB);
171 le16_to_cpus(&temp_desc.idVendor);
172 le16_to_cpus(&temp_desc.idProduct);
173 le16_to_cpus(&temp_desc.bcdDevice);
175 len = sizeof(struct usb_device_descriptor) - pos;
178 if (copy_to_user(buf, ((char *)&temp_desc) + pos, len)) {
189 pos = sizeof(struct usb_device_descriptor);
190 for (i = 0; nbytes && i < dev->descriptor.bNumConfigurations; i++) {
191 struct usb_config_descriptor *config =
192 (struct usb_config_descriptor *)dev->rawdescriptors[i];
193 unsigned int length = le16_to_cpu(config->wTotalLength);
195 if (*ppos < pos + length) {
197 /* The descriptor may claim to be longer than it
198 * really is. Here is the actual allocated length. */
200 le16_to_cpu(dev->config[i].desc.wTotalLength);
202 len = length - (*ppos - pos);
206 /* Simply don't write (skip over) unallocated parts */
207 if (alloclen > (*ppos - pos)) {
208 alloclen -= (*ppos - pos);
209 if (copy_to_user(buf,
210 dev->rawdescriptors[i] + (*ppos - pos),
211 min(len, alloclen))) {
227 usb_unlock_device(dev);
232 * async list handling
235 static struct async *alloc_async(unsigned int numisoframes)
239 as = kzalloc(sizeof(struct async), GFP_KERNEL);
242 as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL);
250 static void free_async(struct async *as)
253 kfree(as->urb->transfer_buffer);
254 kfree(as->urb->setup_packet);
255 usb_free_urb(as->urb);
259 static void async_newpending(struct async *as)
261 struct dev_state *ps = as->ps;
264 spin_lock_irqsave(&ps->lock, flags);
265 list_add_tail(&as->asynclist, &ps->async_pending);
266 spin_unlock_irqrestore(&ps->lock, flags);
269 static void async_removepending(struct async *as)
271 struct dev_state *ps = as->ps;
274 spin_lock_irqsave(&ps->lock, flags);
275 list_del_init(&as->asynclist);
276 spin_unlock_irqrestore(&ps->lock, flags);
279 static struct async *async_getcompleted(struct dev_state *ps)
282 struct async *as = NULL;
284 spin_lock_irqsave(&ps->lock, flags);
285 if (!list_empty(&ps->async_completed)) {
286 as = list_entry(ps->async_completed.next, struct async,
288 list_del_init(&as->asynclist);
290 spin_unlock_irqrestore(&ps->lock, flags);
294 static struct async *async_getpending(struct dev_state *ps,
295 void __user *userurb)
300 spin_lock_irqsave(&ps->lock, flags);
301 list_for_each_entry(as, &ps->async_pending, asynclist)
302 if (as->userurb == userurb) {
303 list_del_init(&as->asynclist);
304 spin_unlock_irqrestore(&ps->lock, flags);
307 spin_unlock_irqrestore(&ps->lock, flags);
311 static void snoop_urb(struct usb_device *udev,
312 void __user *userurb, int pipe, unsigned length,
313 int timeout_or_status, enum snoop_when when,
314 unsigned char *data, unsigned data_len)
316 static const char *types[] = {"isoc", "int", "ctrl", "bulk"};
317 static const char *dirs[] = {"out", "in"};
324 ep = usb_pipeendpoint(pipe);
325 t = types[usb_pipetype(pipe)];
326 d = dirs[!!usb_pipein(pipe)];
328 if (userurb) { /* Async */
330 dev_info(&udev->dev, "userurb %p, ep%d %s-%s, "
332 userurb, ep, t, d, length);
334 dev_info(&udev->dev, "userurb %p, ep%d %s-%s, "
335 "actual_length %u status %d\n",
336 userurb, ep, t, d, length,
340 dev_info(&udev->dev, "ep%d %s-%s, length %u, "
342 ep, t, d, length, timeout_or_status);
344 dev_info(&udev->dev, "ep%d %s-%s, actual_length %u, "
346 ep, t, d, length, timeout_or_status);
349 if (data && data_len > 0) {
350 print_hex_dump(KERN_DEBUG, "data: ", DUMP_PREFIX_NONE, 32, 1,
355 #define AS_CONTINUATION 1
358 static void cancel_bulk_urbs(struct dev_state *ps, unsigned bulk_addr)
364 /* Mark all the pending URBs that match bulk_addr, up to but not
365 * including the first one without AS_CONTINUATION. If such an
366 * URB is encountered then a new transfer has already started so
367 * the endpoint doesn't need to be disabled; otherwise it does.
369 list_for_each_entry(as, &ps->async_pending, asynclist) {
370 if (as->bulk_addr == bulk_addr) {
371 if (as->bulk_status != AS_CONTINUATION)
373 as->bulk_status = AS_UNLINK;
377 ps->disabled_bulk_eps |= (1 << bulk_addr);
379 /* Now carefully unlink all the marked pending URBs */
381 list_for_each_entry(as, &ps->async_pending, asynclist) {
382 if (as->bulk_status == AS_UNLINK) {
383 as->bulk_status = 0; /* Only once */
384 spin_unlock(&ps->lock); /* Allow completions */
385 usb_unlink_urb(as->urb);
386 spin_lock(&ps->lock);
392 static void async_completed(struct urb *urb)
394 struct async *as = urb->context;
395 struct dev_state *ps = as->ps;
396 struct siginfo sinfo;
397 struct pid *pid = NULL;
403 spin_lock(&ps->lock);
404 list_move_tail(&as->asynclist, &ps->async_completed);
405 as->status = urb->status;
408 sinfo.si_signo = as->signr;
409 sinfo.si_errno = as->status;
410 sinfo.si_code = SI_ASYNCIO;
411 sinfo.si_addr = as->userurb;
417 snoop(&urb->dev->dev, "urb complete\n");
418 snoop_urb(urb->dev, as->userurb, urb->pipe, urb->actual_length,
419 as->status, COMPLETE,
420 ((urb->transfer_flags & URB_DIR_MASK) == USB_DIR_OUT) ?
421 NULL : urb->transfer_buffer, urb->actual_length);
422 if (as->status < 0 && as->bulk_addr && as->status != -ECONNRESET &&
423 as->status != -ENOENT)
424 cancel_bulk_urbs(ps, as->bulk_addr);
425 spin_unlock(&ps->lock);
428 kill_pid_info_as_uid(sinfo.si_signo, &sinfo, pid, uid,
434 static void destroy_async(struct dev_state *ps, struct list_head *list)
439 spin_lock_irqsave(&ps->lock, flags);
440 while (!list_empty(list)) {
441 as = list_entry(list->next, struct async, asynclist);
442 list_del_init(&as->asynclist);
444 /* drop the spinlock so the completion handler can run */
445 spin_unlock_irqrestore(&ps->lock, flags);
446 usb_kill_urb(as->urb);
447 spin_lock_irqsave(&ps->lock, flags);
449 spin_unlock_irqrestore(&ps->lock, flags);
452 static void destroy_async_on_interface(struct dev_state *ps,
455 struct list_head *p, *q, hitlist;
458 INIT_LIST_HEAD(&hitlist);
459 spin_lock_irqsave(&ps->lock, flags);
460 list_for_each_safe(p, q, &ps->async_pending)
461 if (ifnum == list_entry(p, struct async, asynclist)->ifnum)
462 list_move_tail(p, &hitlist);
463 spin_unlock_irqrestore(&ps->lock, flags);
464 destroy_async(ps, &hitlist);
467 static void destroy_all_async(struct dev_state *ps)
469 destroy_async(ps, &ps->async_pending);
473 * interface claims are made only at the request of user level code,
474 * which can also release them (explicitly or by closing files).
475 * they're also undone when devices disconnect.
478 static int driver_probe(struct usb_interface *intf,
479 const struct usb_device_id *id)
484 static void driver_disconnect(struct usb_interface *intf)
486 struct dev_state *ps = usb_get_intfdata(intf);
487 unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber;
492 /* NOTE: this relies on usbcore having canceled and completed
493 * all pending I/O requests; 2.6 does that.
496 if (likely(ifnum < 8*sizeof(ps->ifclaimed)))
497 clear_bit(ifnum, &ps->ifclaimed);
499 dev_warn(&intf->dev, "interface number %u out of range\n",
502 usb_set_intfdata(intf, NULL);
504 /* force async requests to complete */
505 destroy_async_on_interface(ps, ifnum);
508 /* The following routines are merely placeholders. There is no way
509 * to inform a user task about suspend or resumes.
511 static int driver_suspend(struct usb_interface *intf, pm_message_t msg)
516 static int driver_resume(struct usb_interface *intf)
521 struct usb_driver usbfs_driver = {
523 .probe = driver_probe,
524 .disconnect = driver_disconnect,
525 .suspend = driver_suspend,
526 .resume = driver_resume,
529 static int claimintf(struct dev_state *ps, unsigned int ifnum)
531 struct usb_device *dev = ps->dev;
532 struct usb_interface *intf;
535 if (ifnum >= 8*sizeof(ps->ifclaimed))
537 /* already claimed */
538 if (test_bit(ifnum, &ps->ifclaimed))
541 intf = usb_ifnum_to_if(dev, ifnum);
545 err = usb_driver_claim_interface(&usbfs_driver, intf, ps);
547 set_bit(ifnum, &ps->ifclaimed);
551 static int releaseintf(struct dev_state *ps, unsigned int ifnum)
553 struct usb_device *dev;
554 struct usb_interface *intf;
558 if (ifnum >= 8*sizeof(ps->ifclaimed))
561 intf = usb_ifnum_to_if(dev, ifnum);
564 else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) {
565 usb_driver_release_interface(&usbfs_driver, intf);
571 static int checkintf(struct dev_state *ps, unsigned int ifnum)
573 if (ps->dev->state != USB_STATE_CONFIGURED)
574 return -EHOSTUNREACH;
575 if (ifnum >= 8*sizeof(ps->ifclaimed))
577 if (test_bit(ifnum, &ps->ifclaimed))
579 /* if not yet claimed, claim it for the driver */
580 dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim "
581 "interface %u before use\n", task_pid_nr(current),
582 current->comm, ifnum);
583 return claimintf(ps, ifnum);
586 static int findintfep(struct usb_device *dev, unsigned int ep)
588 unsigned int i, j, e;
589 struct usb_interface *intf;
590 struct usb_host_interface *alts;
591 struct usb_endpoint_descriptor *endpt;
593 if (ep & ~(USB_DIR_IN|0xf))
597 for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) {
598 intf = dev->actconfig->interface[i];
599 for (j = 0; j < intf->num_altsetting; j++) {
600 alts = &intf->altsetting[j];
601 for (e = 0; e < alts->desc.bNumEndpoints; e++) {
602 endpt = &alts->endpoint[e].desc;
603 if (endpt->bEndpointAddress == ep)
604 return alts->desc.bInterfaceNumber;
611 static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype,
616 if (ps->dev->state != USB_STATE_UNAUTHENTICATED
617 && ps->dev->state != USB_STATE_ADDRESS
618 && ps->dev->state != USB_STATE_CONFIGURED)
619 return -EHOSTUNREACH;
620 if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype))
624 switch (requesttype & USB_RECIP_MASK) {
625 case USB_RECIP_ENDPOINT:
626 ret = findintfep(ps->dev, index);
628 ret = checkintf(ps, ret);
631 case USB_RECIP_INTERFACE:
632 ret = checkintf(ps, index);
638 static int match_devt(struct device *dev, void *data)
640 return dev->devt == (dev_t) (unsigned long) data;
643 static struct usb_device *usbdev_lookup_by_devt(dev_t devt)
647 dev = bus_find_device(&usb_bus_type, NULL,
648 (void *) (unsigned long) devt, match_devt);
651 return container_of(dev, struct usb_device, dev);
657 static int usbdev_open(struct inode *inode, struct file *file)
659 struct usb_device *dev = NULL;
660 struct dev_state *ps;
661 const struct cred *cred = current_cred();
665 ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL);
671 /* Protect against simultaneous removal or release */
672 mutex_lock(&usbfs_mutex);
674 /* usbdev device-node */
675 if (imajor(inode) == USB_DEVICE_MAJOR)
676 dev = usbdev_lookup_by_devt(inode->i_rdev);
678 #ifdef CONFIG_USB_DEVICEFS
681 dev = inode->i_private;
682 if (dev && dev->usbfs_dentry &&
683 dev->usbfs_dentry->d_inode == inode)
689 mutex_unlock(&usbfs_mutex);
694 usb_lock_device(dev);
695 if (dev->state == USB_STATE_NOTATTACHED)
696 goto out_unlock_device;
698 ret = usb_autoresume_device(dev);
700 goto out_unlock_device;
704 spin_lock_init(&ps->lock);
705 INIT_LIST_HEAD(&ps->list);
706 INIT_LIST_HEAD(&ps->async_pending);
707 INIT_LIST_HEAD(&ps->async_completed);
708 init_waitqueue_head(&ps->wait);
710 ps->disc_pid = get_pid(task_pid(current));
711 ps->disc_uid = cred->uid;
712 ps->disc_euid = cred->euid;
713 ps->disccontext = NULL;
715 security_task_getsecid(current, &ps->secid);
717 list_add_tail(&ps->list, &dev->filelist);
718 file->private_data = ps;
719 usb_unlock_device(dev);
720 snoop(&dev->dev, "opened by process %d: %s\n", task_pid_nr(current),
725 usb_unlock_device(dev);
732 static int usbdev_release(struct inode *inode, struct file *file)
734 struct dev_state *ps = file->private_data;
735 struct usb_device *dev = ps->dev;
739 usb_lock_device(dev);
740 usb_hub_release_all_ports(dev, ps);
742 list_del_init(&ps->list);
744 for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed);
746 if (test_bit(ifnum, &ps->ifclaimed))
747 releaseintf(ps, ifnum);
749 destroy_all_async(ps);
750 usb_autosuspend_device(dev);
751 usb_unlock_device(dev);
753 put_pid(ps->disc_pid);
755 as = async_getcompleted(ps);
758 as = async_getcompleted(ps);
764 static int proc_control(struct dev_state *ps, void __user *arg)
766 struct usb_device *dev = ps->dev;
767 struct usbdevfs_ctrltransfer ctrl;
773 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
775 ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.wIndex);
778 wLength = ctrl.wLength; /* To suppress 64k PAGE_SIZE warning */
779 if (wLength > PAGE_SIZE)
781 tbuf = (unsigned char *)__get_free_page(GFP_KERNEL);
785 snoop(&dev->dev, "control urb: bRequestType=%02x "
786 "bRequest=%02x wValue=%04x "
787 "wIndex=%04x wLength=%04x\n",
788 ctrl.bRequestType, ctrl.bRequest,
789 __le16_to_cpup(&ctrl.wValue),
790 __le16_to_cpup(&ctrl.wIndex),
791 __le16_to_cpup(&ctrl.wLength));
792 if (ctrl.bRequestType & 0x80) {
793 if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data,
795 free_page((unsigned long)tbuf);
798 pipe = usb_rcvctrlpipe(dev, 0);
799 snoop_urb(dev, NULL, pipe, ctrl.wLength, tmo, SUBMIT, NULL, 0);
801 usb_unlock_device(dev);
802 i = usb_control_msg(dev, pipe, ctrl.bRequest,
803 ctrl.bRequestType, ctrl.wValue, ctrl.wIndex,
804 tbuf, ctrl.wLength, tmo);
805 usb_lock_device(dev);
806 snoop_urb(dev, NULL, pipe, max(i, 0), min(i, 0), COMPLETE,
808 if ((i > 0) && ctrl.wLength) {
809 if (copy_to_user(ctrl.data, tbuf, i)) {
810 free_page((unsigned long)tbuf);
816 if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) {
817 free_page((unsigned long)tbuf);
821 pipe = usb_sndctrlpipe(dev, 0);
822 snoop_urb(dev, NULL, pipe, ctrl.wLength, tmo, SUBMIT,
825 usb_unlock_device(dev);
826 i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest,
827 ctrl.bRequestType, ctrl.wValue, ctrl.wIndex,
828 tbuf, ctrl.wLength, tmo);
829 usb_lock_device(dev);
830 snoop_urb(dev, NULL, pipe, max(i, 0), min(i, 0), COMPLETE, NULL, 0);
832 free_page((unsigned long)tbuf);
833 if (i < 0 && i != -EPIPE) {
834 dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL "
835 "failed cmd %s rqt %u rq %u len %u ret %d\n",
836 current->comm, ctrl.bRequestType, ctrl.bRequest,
842 static int proc_bulk(struct dev_state *ps, void __user *arg)
844 struct usb_device *dev = ps->dev;
845 struct usbdevfs_bulktransfer bulk;
846 unsigned int tmo, len1, pipe;
851 if (copy_from_user(&bulk, arg, sizeof(bulk)))
853 ret = findintfep(ps->dev, bulk.ep);
856 ret = checkintf(ps, ret);
859 if (bulk.ep & USB_DIR_IN)
860 pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f);
862 pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f);
863 if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN)))
866 if (len1 > MAX_USBFS_BUFFER_SIZE)
868 if (!(tbuf = kmalloc(len1, GFP_KERNEL)))
871 if (bulk.ep & 0x80) {
872 if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) {
876 snoop_urb(dev, NULL, pipe, len1, tmo, SUBMIT, NULL, 0);
878 usb_unlock_device(dev);
879 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
880 usb_lock_device(dev);
881 snoop_urb(dev, NULL, pipe, len2, i, COMPLETE, tbuf, len2);
884 if (copy_to_user(bulk.data, tbuf, len2)) {
891 if (copy_from_user(tbuf, bulk.data, len1)) {
896 snoop_urb(dev, NULL, pipe, len1, tmo, SUBMIT, tbuf, len1);
898 usb_unlock_device(dev);
899 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
900 usb_lock_device(dev);
901 snoop_urb(dev, NULL, pipe, len2, i, COMPLETE, NULL, 0);
909 static int proc_resetep(struct dev_state *ps, void __user *arg)
914 if (get_user(ep, (unsigned int __user *)arg))
916 ret = findintfep(ps->dev, ep);
919 ret = checkintf(ps, ret);
922 usb_reset_endpoint(ps->dev, ep);
926 static int proc_clearhalt(struct dev_state *ps, void __user *arg)
932 if (get_user(ep, (unsigned int __user *)arg))
934 ret = findintfep(ps->dev, ep);
937 ret = checkintf(ps, ret);
941 pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f);
943 pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f);
945 return usb_clear_halt(ps->dev, pipe);
948 static int proc_getdriver(struct dev_state *ps, void __user *arg)
950 struct usbdevfs_getdriver gd;
951 struct usb_interface *intf;
954 if (copy_from_user(&gd, arg, sizeof(gd)))
956 intf = usb_ifnum_to_if(ps->dev, gd.interface);
957 if (!intf || !intf->dev.driver)
960 strncpy(gd.driver, intf->dev.driver->name,
962 ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0);
967 static int proc_connectinfo(struct dev_state *ps, void __user *arg)
969 struct usbdevfs_connectinfo ci;
971 ci.devnum = ps->dev->devnum;
972 ci.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) {
1211 as->urb->dev = ps->dev;
1212 as->urb->pipe = (uurb->type << 30) |
1213 __create_pipe(ps->dev, uurb->endpoint & 0xf) |
1214 (uurb->endpoint & USB_DIR_IN);
1216 /* This tedious sequence is necessary because the URB_* flags
1217 * are internal to the kernel and subject to change, whereas
1218 * the USBDEVFS_URB_* flags are a user API and must not be changed.
1220 u = (is_in ? URB_DIR_IN : URB_DIR_OUT);
1221 if (uurb->flags & USBDEVFS_URB_ISO_ASAP)
1223 if (uurb->flags & USBDEVFS_URB_SHORT_NOT_OK)
1224 u |= URB_SHORT_NOT_OK;
1225 if (uurb->flags & USBDEVFS_URB_NO_FSBR)
1227 if (uurb->flags & USBDEVFS_URB_ZERO_PACKET)
1228 u |= URB_ZERO_PACKET;
1229 if (uurb->flags & USBDEVFS_URB_NO_INTERRUPT)
1230 u |= URB_NO_INTERRUPT;
1231 as->urb->transfer_flags = u;
1233 as->urb->transfer_buffer_length = uurb->buffer_length;
1234 as->urb->setup_packet = (unsigned char *)dr;
1235 as->urb->start_frame = uurb->start_frame;
1236 as->urb->number_of_packets = uurb->number_of_packets;
1237 if (uurb->type == USBDEVFS_URB_TYPE_ISO ||
1238 ps->dev->speed == USB_SPEED_HIGH)
1239 as->urb->interval = 1 << min(15, ep->desc.bInterval - 1);
1241 as->urb->interval = ep->desc.bInterval;
1242 as->urb->context = as;
1243 as->urb->complete = async_completed;
1244 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
1245 as->urb->iso_frame_desc[u].offset = totlen;
1246 as->urb->iso_frame_desc[u].length = isopkt[u].length;
1247 totlen += isopkt[u].length;
1252 if (is_in && uurb->buffer_length > 0)
1253 as->userbuffer = uurb->buffer;
1255 as->userbuffer = NULL;
1256 as->signr = uurb->signr;
1258 as->pid = get_pid(task_pid(current));
1259 as->uid = cred->uid;
1260 as->euid = cred->euid;
1261 security_task_getsecid(current, &as->secid);
1262 if (!is_in && uurb->buffer_length > 0) {
1263 if (copy_from_user(as->urb->transfer_buffer, uurb->buffer,
1264 uurb->buffer_length)) {
1269 snoop_urb(ps->dev, as->userurb, as->urb->pipe,
1270 as->urb->transfer_buffer_length, 0, SUBMIT,
1271 is_in ? NULL : as->urb->transfer_buffer,
1272 uurb->buffer_length);
1273 async_newpending(as);
1275 if (usb_endpoint_xfer_bulk(&ep->desc)) {
1276 spin_lock_irq(&ps->lock);
1278 /* Not exactly the endpoint address; the direction bit is
1279 * shifted to the 0x10 position so that the value will be
1282 as->bulk_addr = usb_endpoint_num(&ep->desc) |
1283 ((ep->desc.bEndpointAddress & USB_ENDPOINT_DIR_MASK)
1286 /* If this bulk URB is the start of a new transfer, re-enable
1287 * the endpoint. Otherwise mark it as a continuation URB.
1289 if (uurb->flags & USBDEVFS_URB_BULK_CONTINUATION)
1290 as->bulk_status = AS_CONTINUATION;
1292 ps->disabled_bulk_eps &= ~(1 << as->bulk_addr);
1294 /* Don't accept continuation URBs if the endpoint is
1295 * disabled because of an earlier error.
1297 if (ps->disabled_bulk_eps & (1 << as->bulk_addr))
1300 ret = usb_submit_urb(as->urb, GFP_ATOMIC);
1301 spin_unlock_irq(&ps->lock);
1303 ret = usb_submit_urb(as->urb, GFP_KERNEL);
1307 dev_printk(KERN_DEBUG, &ps->dev->dev,
1308 "usbfs: usb_submit_urb returned %d\n", ret);
1309 snoop_urb(ps->dev, as->userurb, as->urb->pipe,
1310 0, ret, COMPLETE, NULL, 0);
1311 async_removepending(as);
1318 static int proc_submiturb(struct dev_state *ps, void __user *arg)
1320 struct usbdevfs_urb uurb;
1322 if (copy_from_user(&uurb, arg, sizeof(uurb)))
1325 return proc_do_submiturb(ps, &uurb,
1326 (((struct usbdevfs_urb __user *)arg)->iso_frame_desc),
1330 static int proc_unlinkurb(struct dev_state *ps, void __user *arg)
1334 as = async_getpending(ps, arg);
1337 usb_kill_urb(as->urb);
1341 static int processcompl(struct async *as, void __user * __user *arg)
1343 struct urb *urb = as->urb;
1344 struct usbdevfs_urb __user *userurb = as->userurb;
1345 void __user *addr = as->userurb;
1348 if (as->userbuffer && urb->actual_length)
1349 if (copy_to_user(as->userbuffer, urb->transfer_buffer,
1350 urb->actual_length))
1352 if (put_user(as->status, &userurb->status))
1354 if (put_user(urb->actual_length, &userurb->actual_length))
1356 if (put_user(urb->error_count, &userurb->error_count))
1359 if (usb_endpoint_xfer_isoc(&urb->ep->desc)) {
1360 for (i = 0; i < urb->number_of_packets; i++) {
1361 if (put_user(urb->iso_frame_desc[i].actual_length,
1362 &userurb->iso_frame_desc[i].actual_length))
1364 if (put_user(urb->iso_frame_desc[i].status,
1365 &userurb->iso_frame_desc[i].status))
1370 if (put_user(addr, (void __user * __user *)arg))
1378 static struct async *reap_as(struct dev_state *ps)
1380 DECLARE_WAITQUEUE(wait, current);
1381 struct async *as = NULL;
1382 struct usb_device *dev = ps->dev;
1384 add_wait_queue(&ps->wait, &wait);
1386 __set_current_state(TASK_INTERRUPTIBLE);
1387 as = async_getcompleted(ps);
1390 if (signal_pending(current))
1392 usb_unlock_device(dev);
1394 usb_lock_device(dev);
1396 remove_wait_queue(&ps->wait, &wait);
1397 set_current_state(TASK_RUNNING);
1401 static int proc_reapurb(struct dev_state *ps, void __user *arg)
1403 struct async *as = reap_as(ps);
1405 int retval = processcompl(as, (void __user * __user *)arg);
1409 if (signal_pending(current))
1414 static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg)
1419 as = async_getcompleted(ps);
1422 retval = processcompl(as, (void __user * __user *)arg);
1428 #ifdef CONFIG_COMPAT
1429 static int proc_control_compat(struct dev_state *ps,
1430 struct usbdevfs_ctrltransfer32 __user *p32)
1432 struct usbdevfs_ctrltransfer __user *p;
1434 p = compat_alloc_user_space(sizeof(*p));
1435 if (copy_in_user(p, p32, (sizeof(*p32) - sizeof(compat_caddr_t))) ||
1436 get_user(udata, &p32->data) ||
1437 put_user(compat_ptr(udata), &p->data))
1439 return proc_control(ps, p);
1442 static int proc_bulk_compat(struct dev_state *ps,
1443 struct usbdevfs_bulktransfer32 __user *p32)
1445 struct usbdevfs_bulktransfer __user *p;
1447 compat_caddr_t addr;
1449 p = compat_alloc_user_space(sizeof(*p));
1451 if (get_user(n, &p32->ep) || put_user(n, &p->ep) ||
1452 get_user(n, &p32->len) || put_user(n, &p->len) ||
1453 get_user(n, &p32->timeout) || put_user(n, &p->timeout) ||
1454 get_user(addr, &p32->data) || put_user(compat_ptr(addr), &p->data))
1457 return proc_bulk(ps, p);
1459 static int proc_disconnectsignal_compat(struct dev_state *ps, void __user *arg)
1461 struct usbdevfs_disconnectsignal32 ds;
1463 if (copy_from_user(&ds, arg, sizeof(ds)))
1465 ps->discsignr = ds.signr;
1466 ps->disccontext = compat_ptr(ds.context);
1470 static int get_urb32(struct usbdevfs_urb *kurb,
1471 struct usbdevfs_urb32 __user *uurb)
1474 if (!access_ok(VERIFY_READ, uurb, sizeof(*uurb)) ||
1475 __get_user(kurb->type, &uurb->type) ||
1476 __get_user(kurb->endpoint, &uurb->endpoint) ||
1477 __get_user(kurb->status, &uurb->status) ||
1478 __get_user(kurb->flags, &uurb->flags) ||
1479 __get_user(kurb->buffer_length, &uurb->buffer_length) ||
1480 __get_user(kurb->actual_length, &uurb->actual_length) ||
1481 __get_user(kurb->start_frame, &uurb->start_frame) ||
1482 __get_user(kurb->number_of_packets, &uurb->number_of_packets) ||
1483 __get_user(kurb->error_count, &uurb->error_count) ||
1484 __get_user(kurb->signr, &uurb->signr))
1487 if (__get_user(uptr, &uurb->buffer))
1489 kurb->buffer = compat_ptr(uptr);
1490 if (__get_user(uptr, &uurb->usercontext))
1492 kurb->usercontext = compat_ptr(uptr);
1497 static int proc_submiturb_compat(struct dev_state *ps, void __user *arg)
1499 struct usbdevfs_urb uurb;
1501 if (get_urb32(&uurb, (struct usbdevfs_urb32 __user *)arg))
1504 return proc_do_submiturb(ps, &uurb,
1505 ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc,
1509 static int processcompl_compat(struct async *as, void __user * __user *arg)
1511 struct urb *urb = as->urb;
1512 struct usbdevfs_urb32 __user *userurb = as->userurb;
1513 void __user *addr = as->userurb;
1516 if (as->userbuffer && urb->actual_length)
1517 if (copy_to_user(as->userbuffer, urb->transfer_buffer,
1518 urb->actual_length))
1520 if (put_user(as->status, &userurb->status))
1522 if (put_user(urb->actual_length, &userurb->actual_length))
1524 if (put_user(urb->error_count, &userurb->error_count))
1527 if (usb_endpoint_xfer_isoc(&urb->ep->desc)) {
1528 for (i = 0; i < urb->number_of_packets; i++) {
1529 if (put_user(urb->iso_frame_desc[i].actual_length,
1530 &userurb->iso_frame_desc[i].actual_length))
1532 if (put_user(urb->iso_frame_desc[i].status,
1533 &userurb->iso_frame_desc[i].status))
1538 if (put_user(ptr_to_compat(addr), (u32 __user *)arg))
1543 static int proc_reapurb_compat(struct dev_state *ps, void __user *arg)
1545 struct async *as = reap_as(ps);
1547 int retval = processcompl_compat(as, (void __user * __user *)arg);
1551 if (signal_pending(current))
1556 static int proc_reapurbnonblock_compat(struct dev_state *ps, void __user *arg)
1562 as = async_getcompleted(ps);
1564 retval = processcompl_compat(as, (void __user * __user *)arg);
1573 static int proc_disconnectsignal(struct dev_state *ps, void __user *arg)
1575 struct usbdevfs_disconnectsignal ds;
1577 if (copy_from_user(&ds, arg, sizeof(ds)))
1579 ps->discsignr = ds.signr;
1580 ps->disccontext = ds.context;
1584 static int proc_claiminterface(struct dev_state *ps, void __user *arg)
1588 if (get_user(ifnum, (unsigned int __user *)arg))
1590 return claimintf(ps, ifnum);
1593 static int proc_releaseinterface(struct dev_state *ps, void __user *arg)
1598 if (get_user(ifnum, (unsigned int __user *)arg))
1600 if ((ret = releaseintf(ps, ifnum)) < 0)
1602 destroy_async_on_interface (ps, ifnum);
1606 static int proc_ioctl(struct dev_state *ps, struct usbdevfs_ioctl *ctl)
1611 struct usb_interface *intf = NULL;
1612 struct usb_driver *driver = NULL;
1615 if ((size = _IOC_SIZE(ctl->ioctl_code)) > 0) {
1616 if ((buf = kmalloc(size, GFP_KERNEL)) == NULL)
1618 if ((_IOC_DIR(ctl->ioctl_code) & _IOC_WRITE)) {
1619 if (copy_from_user(buf, ctl->data, size)) {
1624 memset(buf, 0, size);
1628 if (!connected(ps)) {
1633 if (ps->dev->state != USB_STATE_CONFIGURED)
1634 retval = -EHOSTUNREACH;
1635 else if (!(intf = usb_ifnum_to_if(ps->dev, ctl->ifno)))
1637 else switch (ctl->ioctl_code) {
1639 /* disconnect kernel driver from interface */
1640 case USBDEVFS_DISCONNECT:
1641 if (intf->dev.driver) {
1642 driver = to_usb_driver(intf->dev.driver);
1643 dev_dbg(&intf->dev, "disconnect by usbfs\n");
1644 usb_driver_release_interface(driver, intf);
1649 /* let kernel drivers try to (re)bind to the interface */
1650 case USBDEVFS_CONNECT:
1651 if (!intf->dev.driver)
1652 retval = device_attach(&intf->dev);
1657 /* talk directly to the interface's driver */
1659 if (intf->dev.driver)
1660 driver = to_usb_driver(intf->dev.driver);
1661 if (driver == NULL || driver->ioctl == NULL) {
1664 /* keep API that guarantees BKL */
1666 retval = driver->ioctl(intf, ctl->ioctl_code, buf);
1668 if (retval == -ENOIOCTLCMD)
1673 /* cleanup and return */
1675 && (_IOC_DIR(ctl->ioctl_code) & _IOC_READ) != 0
1677 && copy_to_user(ctl->data, buf, size) != 0)
1684 static int proc_ioctl_default(struct dev_state *ps, void __user *arg)
1686 struct usbdevfs_ioctl ctrl;
1688 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
1690 return proc_ioctl(ps, &ctrl);
1693 #ifdef CONFIG_COMPAT
1694 static int proc_ioctl_compat(struct dev_state *ps, compat_uptr_t arg)
1696 struct usbdevfs_ioctl32 __user *uioc;
1697 struct usbdevfs_ioctl ctrl;
1700 uioc = compat_ptr((long)arg);
1701 if (!access_ok(VERIFY_READ, uioc, sizeof(*uioc)) ||
1702 __get_user(ctrl.ifno, &uioc->ifno) ||
1703 __get_user(ctrl.ioctl_code, &uioc->ioctl_code) ||
1704 __get_user(udata, &uioc->data))
1706 ctrl.data = compat_ptr(udata);
1708 return proc_ioctl(ps, &ctrl);
1712 static int proc_claim_port(struct dev_state *ps, void __user *arg)
1717 if (get_user(portnum, (unsigned __user *) arg))
1719 rc = usb_hub_claim_port(ps->dev, portnum, ps);
1721 snoop(&ps->dev->dev, "port %d claimed by process %d: %s\n",
1722 portnum, task_pid_nr(current), current->comm);
1726 static int proc_release_port(struct dev_state *ps, void __user *arg)
1730 if (get_user(portnum, (unsigned __user *) arg))
1732 return usb_hub_release_port(ps->dev, portnum, ps);
1736 * NOTE: All requests here that have interface numbers as parameters
1737 * are assuming that somehow the configuration has been prevented from
1738 * changing. But there's no mechanism to ensure that...
1740 static long usbdev_do_ioctl(struct file *file, unsigned int cmd,
1743 struct dev_state *ps = file->private_data;
1744 struct inode *inode = file->f_path.dentry->d_inode;
1745 struct usb_device *dev = ps->dev;
1748 if (!(file->f_mode & FMODE_WRITE))
1751 usb_lock_device(dev);
1752 if (!connected(ps)) {
1753 usb_unlock_device(dev);
1758 case USBDEVFS_CONTROL:
1759 snoop(&dev->dev, "%s: CONTROL\n", __func__);
1760 ret = proc_control(ps, p);
1762 inode->i_mtime = CURRENT_TIME;
1766 snoop(&dev->dev, "%s: BULK\n", __func__);
1767 ret = proc_bulk(ps, p);
1769 inode->i_mtime = CURRENT_TIME;
1772 case USBDEVFS_RESETEP:
1773 snoop(&dev->dev, "%s: RESETEP\n", __func__);
1774 ret = proc_resetep(ps, p);
1776 inode->i_mtime = CURRENT_TIME;
1779 case USBDEVFS_RESET:
1780 snoop(&dev->dev, "%s: RESET\n", __func__);
1781 ret = proc_resetdevice(ps);
1784 case USBDEVFS_CLEAR_HALT:
1785 snoop(&dev->dev, "%s: CLEAR_HALT\n", __func__);
1786 ret = proc_clearhalt(ps, p);
1788 inode->i_mtime = CURRENT_TIME;
1791 case USBDEVFS_GETDRIVER:
1792 snoop(&dev->dev, "%s: GETDRIVER\n", __func__);
1793 ret = proc_getdriver(ps, p);
1796 case USBDEVFS_CONNECTINFO:
1797 snoop(&dev->dev, "%s: CONNECTINFO\n", __func__);
1798 ret = proc_connectinfo(ps, p);
1801 case USBDEVFS_SETINTERFACE:
1802 snoop(&dev->dev, "%s: SETINTERFACE\n", __func__);
1803 ret = proc_setintf(ps, p);
1806 case USBDEVFS_SETCONFIGURATION:
1807 snoop(&dev->dev, "%s: SETCONFIGURATION\n", __func__);
1808 ret = proc_setconfig(ps, p);
1811 case USBDEVFS_SUBMITURB:
1812 snoop(&dev->dev, "%s: SUBMITURB\n", __func__);
1813 ret = proc_submiturb(ps, p);
1815 inode->i_mtime = CURRENT_TIME;
1818 #ifdef CONFIG_COMPAT
1819 case USBDEVFS_CONTROL32:
1820 snoop(&dev->dev, "%s: CONTROL32\n", __func__);
1821 ret = proc_control_compat(ps, p);
1823 inode->i_mtime = CURRENT_TIME;
1826 case USBDEVFS_BULK32:
1827 snoop(&dev->dev, "%s: BULK32\n", __func__);
1828 ret = proc_bulk_compat(ps, p);
1830 inode->i_mtime = CURRENT_TIME;
1833 case USBDEVFS_DISCSIGNAL32:
1834 snoop(&dev->dev, "%s: DISCSIGNAL32\n", __func__);
1835 ret = proc_disconnectsignal_compat(ps, p);
1838 case USBDEVFS_SUBMITURB32:
1839 snoop(&dev->dev, "%s: SUBMITURB32\n", __func__);
1840 ret = proc_submiturb_compat(ps, p);
1842 inode->i_mtime = CURRENT_TIME;
1845 case USBDEVFS_REAPURB32:
1846 snoop(&dev->dev, "%s: REAPURB32\n", __func__);
1847 ret = proc_reapurb_compat(ps, p);
1850 case USBDEVFS_REAPURBNDELAY32:
1851 snoop(&dev->dev, "%s: REAPURBNDELAY32\n", __func__);
1852 ret = proc_reapurbnonblock_compat(ps, p);
1855 case USBDEVFS_IOCTL32:
1856 snoop(&dev->dev, "%s: IOCTL32\n", __func__);
1857 ret = proc_ioctl_compat(ps, ptr_to_compat(p));
1861 case USBDEVFS_DISCARDURB:
1862 snoop(&dev->dev, "%s: DISCARDURB\n", __func__);
1863 ret = proc_unlinkurb(ps, p);
1866 case USBDEVFS_REAPURB:
1867 snoop(&dev->dev, "%s: REAPURB\n", __func__);
1868 ret = proc_reapurb(ps, p);
1871 case USBDEVFS_REAPURBNDELAY:
1872 snoop(&dev->dev, "%s: REAPURBNDELAY\n", __func__);
1873 ret = proc_reapurbnonblock(ps, p);
1876 case USBDEVFS_DISCSIGNAL:
1877 snoop(&dev->dev, "%s: DISCSIGNAL\n", __func__);
1878 ret = proc_disconnectsignal(ps, p);
1881 case USBDEVFS_CLAIMINTERFACE:
1882 snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __func__);
1883 ret = proc_claiminterface(ps, p);
1886 case USBDEVFS_RELEASEINTERFACE:
1887 snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __func__);
1888 ret = proc_releaseinterface(ps, p);
1891 case USBDEVFS_IOCTL:
1892 snoop(&dev->dev, "%s: IOCTL\n", __func__);
1893 ret = proc_ioctl_default(ps, p);
1896 case USBDEVFS_CLAIM_PORT:
1897 snoop(&dev->dev, "%s: CLAIM_PORT\n", __func__);
1898 ret = proc_claim_port(ps, p);
1901 case USBDEVFS_RELEASE_PORT:
1902 snoop(&dev->dev, "%s: RELEASE_PORT\n", __func__);
1903 ret = proc_release_port(ps, p);
1906 usb_unlock_device(dev);
1908 inode->i_atime = CURRENT_TIME;
1912 static long usbdev_ioctl(struct file *file, unsigned int cmd,
1917 ret = usbdev_do_ioctl(file, cmd, (void __user *)arg);
1922 #ifdef CONFIG_COMPAT
1923 static long usbdev_compat_ioctl(struct file *file, unsigned int cmd,
1928 ret = usbdev_do_ioctl(file, cmd, compat_ptr(arg));
1934 /* No kernel lock - fine */
1935 static unsigned int usbdev_poll(struct file *file,
1936 struct poll_table_struct *wait)
1938 struct dev_state *ps = file->private_data;
1939 unsigned int mask = 0;
1941 poll_wait(file, &ps->wait, wait);
1942 if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed))
1943 mask |= POLLOUT | POLLWRNORM;
1945 mask |= POLLERR | POLLHUP;
1949 const struct file_operations usbdev_file_operations = {
1950 .owner = THIS_MODULE,
1951 .llseek = usbdev_lseek,
1952 .read = usbdev_read,
1953 .poll = usbdev_poll,
1954 .unlocked_ioctl = usbdev_ioctl,
1955 #ifdef CONFIG_COMPAT
1956 .compat_ioctl = usbdev_compat_ioctl,
1958 .open = usbdev_open,
1959 .release = usbdev_release,
1962 static void usbdev_remove(struct usb_device *udev)
1964 struct dev_state *ps;
1965 struct siginfo sinfo;
1967 while (!list_empty(&udev->filelist)) {
1968 ps = list_entry(udev->filelist.next, struct dev_state, list);
1969 destroy_all_async(ps);
1970 wake_up_all(&ps->wait);
1971 list_del_init(&ps->list);
1972 if (ps->discsignr) {
1973 sinfo.si_signo = ps->discsignr;
1974 sinfo.si_errno = EPIPE;
1975 sinfo.si_code = SI_ASYNCIO;
1976 sinfo.si_addr = ps->disccontext;
1977 kill_pid_info_as_uid(ps->discsignr, &sinfo,
1978 ps->disc_pid, ps->disc_uid,
1979 ps->disc_euid, ps->secid);
1984 #ifdef CONFIG_USB_DEVICE_CLASS
1985 static struct class *usb_classdev_class;
1987 static int usb_classdev_add(struct usb_device *dev)
1989 struct device *cldev;
1991 cldev = device_create(usb_classdev_class, &dev->dev, dev->dev.devt,
1992 NULL, "usbdev%d.%d", dev->bus->busnum,
1995 return PTR_ERR(cldev);
1996 dev->usb_classdev = cldev;
2000 static void usb_classdev_remove(struct usb_device *dev)
2002 if (dev->usb_classdev)
2003 device_unregister(dev->usb_classdev);
2007 #define usb_classdev_add(dev) 0
2008 #define usb_classdev_remove(dev) do {} while (0)
2012 static int usbdev_notify(struct notifier_block *self,
2013 unsigned long action, void *dev)
2016 case USB_DEVICE_ADD:
2017 if (usb_classdev_add(dev))
2020 case USB_DEVICE_REMOVE:
2021 usb_classdev_remove(dev);
2028 static struct notifier_block usbdev_nb = {
2029 .notifier_call = usbdev_notify,
2032 static struct cdev usb_device_cdev;
2034 int __init usb_devio_init(void)
2038 retval = register_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX,
2041 printk(KERN_ERR "Unable to register minors for usb_device\n");
2044 cdev_init(&usb_device_cdev, &usbdev_file_operations);
2045 retval = cdev_add(&usb_device_cdev, USB_DEVICE_DEV, USB_DEVICE_MAX);
2047 printk(KERN_ERR "Unable to get usb_device major %d\n",
2051 #ifdef CONFIG_USB_DEVICE_CLASS
2052 usb_classdev_class = class_create(THIS_MODULE, "usb_device");
2053 if (IS_ERR(usb_classdev_class)) {
2054 printk(KERN_ERR "Unable to register usb_device class\n");
2055 retval = PTR_ERR(usb_classdev_class);
2056 cdev_del(&usb_device_cdev);
2057 usb_classdev_class = NULL;
2060 /* devices of this class shadow the major:minor of their parent
2061 * device, so clear ->dev_kobj to prevent adding duplicate entries
2064 usb_classdev_class->dev_kobj = NULL;
2066 usb_register_notify(&usbdev_nb);
2071 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
2075 void usb_devio_cleanup(void)
2077 usb_unregister_notify(&usbdev_nb);
2078 #ifdef CONFIG_USB_DEVICE_CLASS
2079 class_destroy(usb_classdev_class);
2081 cdev_del(&usb_device_cdev);
2082 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);