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/usb.h>
44 #include <linux/usbdevice_fs.h>
45 #include <linux/usb/hcd.h> /* for usbcore internals */
46 #include <linux/cdev.h>
47 #include <linux/notifier.h>
48 #include <linux/security.h>
49 #include <linux/user_namespace.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 const struct cred *cred;
73 void __user *disccontext;
74 unsigned long ifclaimed;
76 u32 disabled_bulk_eps;
80 struct list_head asynclist;
83 const struct cred *cred;
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)
254 kfree(as->urb->transfer_buffer);
255 kfree(as->urb->setup_packet);
256 usb_free_urb(as->urb);
260 static void async_newpending(struct async *as)
262 struct dev_state *ps = as->ps;
265 spin_lock_irqsave(&ps->lock, flags);
266 list_add_tail(&as->asynclist, &ps->async_pending);
267 spin_unlock_irqrestore(&ps->lock, flags);
270 static void async_removepending(struct async *as)
272 struct dev_state *ps = as->ps;
275 spin_lock_irqsave(&ps->lock, flags);
276 list_del_init(&as->asynclist);
277 spin_unlock_irqrestore(&ps->lock, flags);
280 static struct async *async_getcompleted(struct dev_state *ps)
283 struct async *as = NULL;
285 spin_lock_irqsave(&ps->lock, flags);
286 if (!list_empty(&ps->async_completed)) {
287 as = list_entry(ps->async_completed.next, struct async,
289 list_del_init(&as->asynclist);
291 spin_unlock_irqrestore(&ps->lock, flags);
295 static struct async *async_getpending(struct dev_state *ps,
296 void __user *userurb)
300 list_for_each_entry(as, &ps->async_pending, asynclist)
301 if (as->userurb == userurb) {
302 list_del_init(&as->asynclist);
309 static void snoop_urb(struct usb_device *udev,
310 void __user *userurb, int pipe, unsigned length,
311 int timeout_or_status, enum snoop_when when,
312 unsigned char *data, unsigned data_len)
314 static const char *types[] = {"isoc", "int", "ctrl", "bulk"};
315 static const char *dirs[] = {"out", "in"};
322 ep = usb_pipeendpoint(pipe);
323 t = types[usb_pipetype(pipe)];
324 d = dirs[!!usb_pipein(pipe)];
326 if (userurb) { /* Async */
328 dev_info(&udev->dev, "userurb %p, ep%d %s-%s, "
330 userurb, ep, t, d, length);
332 dev_info(&udev->dev, "userurb %p, ep%d %s-%s, "
333 "actual_length %u status %d\n",
334 userurb, ep, t, d, length,
338 dev_info(&udev->dev, "ep%d %s-%s, length %u, "
340 ep, t, d, length, timeout_or_status);
342 dev_info(&udev->dev, "ep%d %s-%s, actual_length %u, "
344 ep, t, d, length, timeout_or_status);
347 if (data && data_len > 0) {
348 print_hex_dump(KERN_DEBUG, "data: ", DUMP_PREFIX_NONE, 32, 1,
353 #define AS_CONTINUATION 1
356 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 */
385 spin_unlock(&ps->lock); /* Allow completions */
388 spin_lock(&ps->lock);
394 static void async_completed(struct urb *urb)
396 struct async *as = urb->context;
397 struct dev_state *ps = as->ps;
398 struct siginfo sinfo;
399 struct pid *pid = NULL;
401 const struct cred *cred = NULL;
404 spin_lock(&ps->lock);
405 list_move_tail(&as->asynclist, &ps->async_completed);
406 as->status = urb->status;
409 sinfo.si_signo = as->signr;
410 sinfo.si_errno = as->status;
411 sinfo.si_code = SI_ASYNCIO;
412 sinfo.si_addr = as->userurb;
413 pid = get_pid(as->pid);
414 cred = get_cred(as->cred);
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_cred(sinfo.si_signo, &sinfo, pid, cred, secid);
436 static void destroy_async(struct dev_state *ps, struct list_head *list)
442 spin_lock_irqsave(&ps->lock, flags);
443 while (!list_empty(list)) {
444 as = list_entry(list->next, struct async, asynclist);
445 list_del_init(&as->asynclist);
449 /* drop the spinlock so the completion handler can run */
450 spin_unlock_irqrestore(&ps->lock, flags);
453 spin_lock_irqsave(&ps->lock, flags);
455 spin_unlock_irqrestore(&ps->lock, flags);
458 static void destroy_async_on_interface(struct dev_state *ps,
461 struct list_head *p, *q, hitlist;
464 INIT_LIST_HEAD(&hitlist);
465 spin_lock_irqsave(&ps->lock, flags);
466 list_for_each_safe(p, q, &ps->async_pending)
467 if (ifnum == list_entry(p, struct async, asynclist)->ifnum)
468 list_move_tail(p, &hitlist);
469 spin_unlock_irqrestore(&ps->lock, flags);
470 destroy_async(ps, &hitlist);
473 static void destroy_all_async(struct dev_state *ps)
475 destroy_async(ps, &ps->async_pending);
479 * interface claims are made only at the request of user level code,
480 * which can also release them (explicitly or by closing files).
481 * they're also undone when devices disconnect.
484 static int driver_probe(struct usb_interface *intf,
485 const struct usb_device_id *id)
490 static void driver_disconnect(struct usb_interface *intf)
492 struct dev_state *ps = usb_get_intfdata(intf);
493 unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber;
498 /* NOTE: this relies on usbcore having canceled and completed
499 * all pending I/O requests; 2.6 does that.
502 if (likely(ifnum < 8*sizeof(ps->ifclaimed)))
503 clear_bit(ifnum, &ps->ifclaimed);
505 dev_warn(&intf->dev, "interface number %u out of range\n",
508 usb_set_intfdata(intf, NULL);
510 /* force async requests to complete */
511 destroy_async_on_interface(ps, ifnum);
514 /* The following routines are merely placeholders. There is no way
515 * to inform a user task about suspend or resumes.
517 static int driver_suspend(struct usb_interface *intf, pm_message_t msg)
522 static int driver_resume(struct usb_interface *intf)
527 struct usb_driver usbfs_driver = {
529 .probe = driver_probe,
530 .disconnect = driver_disconnect,
531 .suspend = driver_suspend,
532 .resume = driver_resume,
535 static int claimintf(struct dev_state *ps, unsigned int ifnum)
537 struct usb_device *dev = ps->dev;
538 struct usb_interface *intf;
541 if (ifnum >= 8*sizeof(ps->ifclaimed))
543 /* already claimed */
544 if (test_bit(ifnum, &ps->ifclaimed))
547 intf = usb_ifnum_to_if(dev, ifnum);
551 err = usb_driver_claim_interface(&usbfs_driver, intf, ps);
553 set_bit(ifnum, &ps->ifclaimed);
557 static int releaseintf(struct dev_state *ps, unsigned int ifnum)
559 struct usb_device *dev;
560 struct usb_interface *intf;
564 if (ifnum >= 8*sizeof(ps->ifclaimed))
567 intf = usb_ifnum_to_if(dev, ifnum);
570 else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) {
571 usb_driver_release_interface(&usbfs_driver, intf);
577 static int checkintf(struct dev_state *ps, unsigned int ifnum)
579 if (ps->dev->state != USB_STATE_CONFIGURED)
580 return -EHOSTUNREACH;
581 if (ifnum >= 8*sizeof(ps->ifclaimed))
583 if (test_bit(ifnum, &ps->ifclaimed))
585 /* if not yet claimed, claim it for the driver */
586 dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim "
587 "interface %u before use\n", task_pid_nr(current),
588 current->comm, ifnum);
589 return claimintf(ps, ifnum);
592 static int findintfep(struct usb_device *dev, unsigned int ep)
594 unsigned int i, j, e;
595 struct usb_interface *intf;
596 struct usb_host_interface *alts;
597 struct usb_endpoint_descriptor *endpt;
599 if (ep & ~(USB_DIR_IN|0xf))
603 for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) {
604 intf = dev->actconfig->interface[i];
605 for (j = 0; j < intf->num_altsetting; j++) {
606 alts = &intf->altsetting[j];
607 for (e = 0; e < alts->desc.bNumEndpoints; e++) {
608 endpt = &alts->endpoint[e].desc;
609 if (endpt->bEndpointAddress == ep)
610 return alts->desc.bInterfaceNumber;
617 static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype,
618 unsigned int request, unsigned int index)
621 struct usb_host_interface *alt_setting;
623 if (ps->dev->state != USB_STATE_UNAUTHENTICATED
624 && ps->dev->state != USB_STATE_ADDRESS
625 && ps->dev->state != USB_STATE_CONFIGURED)
626 return -EHOSTUNREACH;
627 if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype))
631 * check for the special corner case 'get_device_id' in the printer
632 * class specification, where wIndex is (interface << 8 | altsetting)
633 * instead of just interface
635 if (requesttype == 0xa1 && request == 0) {
636 alt_setting = usb_find_alt_setting(ps->dev->actconfig,
637 index >> 8, index & 0xff);
639 && alt_setting->desc.bInterfaceClass == USB_CLASS_PRINTER)
644 switch (requesttype & USB_RECIP_MASK) {
645 case USB_RECIP_ENDPOINT:
646 ret = findintfep(ps->dev, index);
648 ret = checkintf(ps, ret);
651 case USB_RECIP_INTERFACE:
652 ret = checkintf(ps, index);
658 static int match_devt(struct device *dev, void *data)
660 return dev->devt == (dev_t) (unsigned long) data;
663 static struct usb_device *usbdev_lookup_by_devt(dev_t devt)
667 dev = bus_find_device(&usb_bus_type, NULL,
668 (void *) (unsigned long) devt, match_devt);
671 return container_of(dev, struct usb_device, dev);
677 static int usbdev_open(struct inode *inode, struct file *file)
679 struct usb_device *dev = NULL;
680 struct dev_state *ps;
684 ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL);
690 /* Protect against simultaneous removal or release */
691 mutex_lock(&usbfs_mutex);
693 /* usbdev device-node */
694 if (imajor(inode) == USB_DEVICE_MAJOR)
695 dev = usbdev_lookup_by_devt(inode->i_rdev);
697 #ifdef CONFIG_USB_DEVICEFS
700 dev = inode->i_private;
701 if (dev && dev->usbfs_dentry &&
702 dev->usbfs_dentry->d_inode == inode)
708 mutex_unlock(&usbfs_mutex);
713 usb_lock_device(dev);
714 if (dev->state == USB_STATE_NOTATTACHED)
715 goto out_unlock_device;
717 ret = usb_autoresume_device(dev);
719 goto out_unlock_device;
723 spin_lock_init(&ps->lock);
724 INIT_LIST_HEAD(&ps->list);
725 INIT_LIST_HEAD(&ps->async_pending);
726 INIT_LIST_HEAD(&ps->async_completed);
727 init_waitqueue_head(&ps->wait);
729 ps->disc_pid = get_pid(task_pid(current));
730 ps->cred = get_current_cred();
731 ps->disccontext = NULL;
733 security_task_getsecid(current, &ps->secid);
735 list_add_tail(&ps->list, &dev->filelist);
736 file->private_data = ps;
737 usb_unlock_device(dev);
738 snoop(&dev->dev, "opened by process %d: %s\n", task_pid_nr(current),
743 usb_unlock_device(dev);
750 static int usbdev_release(struct inode *inode, struct file *file)
752 struct dev_state *ps = file->private_data;
753 struct usb_device *dev = ps->dev;
757 usb_lock_device(dev);
758 usb_hub_release_all_ports(dev, ps);
760 list_del_init(&ps->list);
762 for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed);
764 if (test_bit(ifnum, &ps->ifclaimed))
765 releaseintf(ps, ifnum);
767 destroy_all_async(ps);
768 usb_autosuspend_device(dev);
769 usb_unlock_device(dev);
771 put_pid(ps->disc_pid);
774 as = async_getcompleted(ps);
777 as = async_getcompleted(ps);
783 static int proc_control(struct dev_state *ps, void __user *arg)
785 struct usb_device *dev = ps->dev;
786 struct usbdevfs_ctrltransfer ctrl;
792 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
794 ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.bRequest,
798 wLength = ctrl.wLength; /* To suppress 64k PAGE_SIZE warning */
799 if (wLength > PAGE_SIZE)
801 tbuf = (unsigned char *)__get_free_page(GFP_KERNEL);
805 snoop(&dev->dev, "control urb: bRequestType=%02x "
806 "bRequest=%02x wValue=%04x "
807 "wIndex=%04x wLength=%04x\n",
808 ctrl.bRequestType, ctrl.bRequest,
809 __le16_to_cpup(&ctrl.wValue),
810 __le16_to_cpup(&ctrl.wIndex),
811 __le16_to_cpup(&ctrl.wLength));
812 if (ctrl.bRequestType & 0x80) {
813 if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data,
815 free_page((unsigned long)tbuf);
818 pipe = usb_rcvctrlpipe(dev, 0);
819 snoop_urb(dev, NULL, pipe, ctrl.wLength, tmo, SUBMIT, NULL, 0);
821 usb_unlock_device(dev);
822 i = usb_control_msg(dev, pipe, ctrl.bRequest,
823 ctrl.bRequestType, ctrl.wValue, ctrl.wIndex,
824 tbuf, ctrl.wLength, tmo);
825 usb_lock_device(dev);
826 snoop_urb(dev, NULL, pipe, max(i, 0), min(i, 0), COMPLETE,
828 if ((i > 0) && ctrl.wLength) {
829 if (copy_to_user(ctrl.data, tbuf, i)) {
830 free_page((unsigned long)tbuf);
836 if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) {
837 free_page((unsigned long)tbuf);
841 pipe = usb_sndctrlpipe(dev, 0);
842 snoop_urb(dev, NULL, pipe, ctrl.wLength, tmo, SUBMIT,
845 usb_unlock_device(dev);
846 i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest,
847 ctrl.bRequestType, ctrl.wValue, ctrl.wIndex,
848 tbuf, ctrl.wLength, tmo);
849 usb_lock_device(dev);
850 snoop_urb(dev, NULL, pipe, max(i, 0), min(i, 0), COMPLETE, NULL, 0);
852 free_page((unsigned long)tbuf);
853 if (i < 0 && i != -EPIPE) {
854 dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL "
855 "failed cmd %s rqt %u rq %u len %u ret %d\n",
856 current->comm, ctrl.bRequestType, ctrl.bRequest,
862 static int proc_bulk(struct dev_state *ps, void __user *arg)
864 struct usb_device *dev = ps->dev;
865 struct usbdevfs_bulktransfer bulk;
866 unsigned int tmo, len1, pipe;
871 if (copy_from_user(&bulk, arg, sizeof(bulk)))
873 ret = findintfep(ps->dev, bulk.ep);
876 ret = checkintf(ps, ret);
879 if (bulk.ep & USB_DIR_IN)
880 pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f);
882 pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f);
883 if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN)))
886 if (len1 > MAX_USBFS_BUFFER_SIZE)
888 if (!(tbuf = kmalloc(len1, GFP_KERNEL)))
891 if (bulk.ep & 0x80) {
892 if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) {
896 snoop_urb(dev, NULL, pipe, len1, tmo, SUBMIT, NULL, 0);
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, tbuf, len2);
904 if (copy_to_user(bulk.data, tbuf, len2)) {
911 if (copy_from_user(tbuf, bulk.data, len1)) {
916 snoop_urb(dev, NULL, pipe, len1, tmo, SUBMIT, tbuf, len1);
918 usb_unlock_device(dev);
919 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
920 usb_lock_device(dev);
921 snoop_urb(dev, NULL, pipe, len2, i, COMPLETE, NULL, 0);
929 static int proc_resetep(struct dev_state *ps, void __user *arg)
934 if (get_user(ep, (unsigned int __user *)arg))
936 ret = findintfep(ps->dev, ep);
939 ret = checkintf(ps, ret);
942 usb_reset_endpoint(ps->dev, ep);
946 static int proc_clearhalt(struct dev_state *ps, void __user *arg)
952 if (get_user(ep, (unsigned int __user *)arg))
954 ret = findintfep(ps->dev, ep);
957 ret = checkintf(ps, ret);
961 pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f);
963 pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f);
965 return usb_clear_halt(ps->dev, pipe);
968 static int proc_getdriver(struct dev_state *ps, void __user *arg)
970 struct usbdevfs_getdriver gd;
971 struct usb_interface *intf;
974 if (copy_from_user(&gd, arg, sizeof(gd)))
976 intf = usb_ifnum_to_if(ps->dev, gd.interface);
977 if (!intf || !intf->dev.driver)
980 strncpy(gd.driver, intf->dev.driver->name,
982 ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0);
987 static int proc_connectinfo(struct dev_state *ps, void __user *arg)
989 struct usbdevfs_connectinfo ci = {
990 .devnum = ps->dev->devnum,
991 .slow = ps->dev->speed == USB_SPEED_LOW
994 if (copy_to_user(arg, &ci, sizeof(ci)))
999 static int proc_resetdevice(struct dev_state *ps)
1001 return usb_reset_device(ps->dev);
1004 static int proc_setintf(struct dev_state *ps, void __user *arg)
1006 struct usbdevfs_setinterface setintf;
1009 if (copy_from_user(&setintf, arg, sizeof(setintf)))
1011 if ((ret = checkintf(ps, setintf.interface)))
1013 return usb_set_interface(ps->dev, setintf.interface,
1014 setintf.altsetting);
1017 static int proc_setconfig(struct dev_state *ps, void __user *arg)
1021 struct usb_host_config *actconfig;
1023 if (get_user(u, (int __user *)arg))
1026 actconfig = ps->dev->actconfig;
1028 /* Don't touch the device if any interfaces are claimed.
1029 * It could interfere with other drivers' operations, and if
1030 * an interface is claimed by usbfs it could easily deadlock.
1035 for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) {
1036 if (usb_interface_claimed(actconfig->interface[i])) {
1037 dev_warn(&ps->dev->dev,
1038 "usbfs: interface %d claimed by %s "
1039 "while '%s' sets config #%d\n",
1040 actconfig->interface[i]
1042 ->desc.bInterfaceNumber,
1043 actconfig->interface[i]
1052 /* SET_CONFIGURATION is often abused as a "cheap" driver reset,
1053 * so avoid usb_set_configuration()'s kick to sysfs
1056 if (actconfig && actconfig->desc.bConfigurationValue == u)
1057 status = usb_reset_configuration(ps->dev);
1059 status = usb_set_configuration(ps->dev, u);
1065 static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
1066 struct usbdevfs_iso_packet_desc __user *iso_frame_desc,
1069 struct usbdevfs_iso_packet_desc *isopkt = NULL;
1070 struct usb_host_endpoint *ep;
1072 struct usb_ctrlrequest *dr = NULL;
1073 unsigned int u, totlen, isofrmlen;
1074 int ret, ifnum = -1;
1077 if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP |
1078 USBDEVFS_URB_SHORT_NOT_OK |
1079 USBDEVFS_URB_BULK_CONTINUATION |
1080 USBDEVFS_URB_NO_FSBR |
1081 USBDEVFS_URB_ZERO_PACKET |
1082 USBDEVFS_URB_NO_INTERRUPT))
1084 if (uurb->buffer_length > 0 && !uurb->buffer)
1086 if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL &&
1087 (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) {
1088 ifnum = findintfep(ps->dev, uurb->endpoint);
1091 ret = checkintf(ps, ifnum);
1095 if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0) {
1097 ep = ps->dev->ep_in[uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
1100 ep = ps->dev->ep_out[uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
1104 switch(uurb->type) {
1105 case USBDEVFS_URB_TYPE_CONTROL:
1106 if (!usb_endpoint_xfer_control(&ep->desc))
1108 /* min 8 byte setup packet,
1109 * max 8 byte setup plus an arbitrary data stage */
1110 if (uurb->buffer_length < 8 ||
1111 uurb->buffer_length > (8 + MAX_USBFS_BUFFER_SIZE))
1113 dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL);
1116 if (copy_from_user(dr, uurb->buffer, 8)) {
1120 if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) {
1124 ret = check_ctrlrecip(ps, dr->bRequestType, dr->bRequest,
1125 le16_to_cpup(&dr->wIndex));
1130 uurb->number_of_packets = 0;
1131 uurb->buffer_length = le16_to_cpup(&dr->wLength);
1133 if ((dr->bRequestType & USB_DIR_IN) && uurb->buffer_length) {
1135 uurb->endpoint |= USB_DIR_IN;
1138 uurb->endpoint &= ~USB_DIR_IN;
1140 snoop(&ps->dev->dev, "control urb: bRequestType=%02x "
1141 "bRequest=%02x wValue=%04x "
1142 "wIndex=%04x wLength=%04x\n",
1143 dr->bRequestType, dr->bRequest,
1144 __le16_to_cpup(&dr->wValue),
1145 __le16_to_cpup(&dr->wIndex),
1146 __le16_to_cpup(&dr->wLength));
1149 case USBDEVFS_URB_TYPE_BULK:
1150 switch (usb_endpoint_type(&ep->desc)) {
1151 case USB_ENDPOINT_XFER_CONTROL:
1152 case USB_ENDPOINT_XFER_ISOC:
1154 case USB_ENDPOINT_XFER_INT:
1155 /* allow single-shot interrupt transfers */
1156 uurb->type = USBDEVFS_URB_TYPE_INTERRUPT;
1159 uurb->number_of_packets = 0;
1160 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE)
1164 case USBDEVFS_URB_TYPE_INTERRUPT:
1165 if (!usb_endpoint_xfer_int(&ep->desc))
1168 uurb->number_of_packets = 0;
1169 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE)
1173 case USBDEVFS_URB_TYPE_ISO:
1174 /* arbitrary limit */
1175 if (uurb->number_of_packets < 1 ||
1176 uurb->number_of_packets > 128)
1178 if (!usb_endpoint_xfer_isoc(&ep->desc))
1180 isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) *
1181 uurb->number_of_packets;
1182 if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL)))
1184 if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) {
1188 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
1190 * sufficient for USB 2.0 high-bandwidth iso */
1191 if (isopkt[u].length > 8192) {
1195 totlen += isopkt[u].length;
1197 /* 3072 * 64 microframes */
1198 if (totlen > 196608) {
1202 uurb->buffer_length = totlen;
1208 if (uurb->buffer_length > 0 &&
1209 !access_ok(is_in ? VERIFY_WRITE : VERIFY_READ,
1210 uurb->buffer, uurb->buffer_length)) {
1215 as = alloc_async(uurb->number_of_packets);
1221 if (uurb->buffer_length > 0) {
1222 as->urb->transfer_buffer = kmalloc(uurb->buffer_length,
1224 if (!as->urb->transfer_buffer) {
1230 /* Isochronous input data may end up being discontiguous
1231 * if some of the packets are short. Clear the buffer so
1232 * that the gaps don't leak kernel data to userspace.
1234 if (is_in && uurb->type == USBDEVFS_URB_TYPE_ISO)
1235 memset(as->urb->transfer_buffer, 0,
1236 uurb->buffer_length);
1238 as->urb->dev = ps->dev;
1239 as->urb->pipe = (uurb->type << 30) |
1240 __create_pipe(ps->dev, uurb->endpoint & 0xf) |
1241 (uurb->endpoint & USB_DIR_IN);
1243 /* This tedious sequence is necessary because the URB_* flags
1244 * are internal to the kernel and subject to change, whereas
1245 * the USBDEVFS_URB_* flags are a user API and must not be changed.
1247 u = (is_in ? URB_DIR_IN : URB_DIR_OUT);
1248 if (uurb->flags & USBDEVFS_URB_ISO_ASAP)
1250 if (uurb->flags & USBDEVFS_URB_SHORT_NOT_OK)
1251 u |= URB_SHORT_NOT_OK;
1252 if (uurb->flags & USBDEVFS_URB_NO_FSBR)
1254 if (uurb->flags & USBDEVFS_URB_ZERO_PACKET)
1255 u |= URB_ZERO_PACKET;
1256 if (uurb->flags & USBDEVFS_URB_NO_INTERRUPT)
1257 u |= URB_NO_INTERRUPT;
1258 as->urb->transfer_flags = u;
1260 as->urb->transfer_buffer_length = uurb->buffer_length;
1261 as->urb->setup_packet = (unsigned char *)dr;
1262 as->urb->start_frame = uurb->start_frame;
1263 as->urb->number_of_packets = uurb->number_of_packets;
1264 if (uurb->type == USBDEVFS_URB_TYPE_ISO ||
1265 ps->dev->speed == USB_SPEED_HIGH)
1266 as->urb->interval = 1 << min(15, ep->desc.bInterval - 1);
1268 as->urb->interval = ep->desc.bInterval;
1269 as->urb->context = as;
1270 as->urb->complete = async_completed;
1271 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
1272 as->urb->iso_frame_desc[u].offset = totlen;
1273 as->urb->iso_frame_desc[u].length = isopkt[u].length;
1274 totlen += isopkt[u].length;
1279 if (is_in && uurb->buffer_length > 0)
1280 as->userbuffer = uurb->buffer;
1282 as->userbuffer = NULL;
1283 as->signr = uurb->signr;
1285 as->pid = get_pid(task_pid(current));
1286 as->cred = get_current_cred();
1287 security_task_getsecid(current, &as->secid);
1288 if (!is_in && uurb->buffer_length > 0) {
1289 if (copy_from_user(as->urb->transfer_buffer, uurb->buffer,
1290 uurb->buffer_length)) {
1295 snoop_urb(ps->dev, as->userurb, as->urb->pipe,
1296 as->urb->transfer_buffer_length, 0, SUBMIT,
1297 is_in ? NULL : as->urb->transfer_buffer,
1298 uurb->buffer_length);
1299 async_newpending(as);
1301 if (usb_endpoint_xfer_bulk(&ep->desc)) {
1302 spin_lock_irq(&ps->lock);
1304 /* Not exactly the endpoint address; the direction bit is
1305 * shifted to the 0x10 position so that the value will be
1308 as->bulk_addr = usb_endpoint_num(&ep->desc) |
1309 ((ep->desc.bEndpointAddress & USB_ENDPOINT_DIR_MASK)
1312 /* If this bulk URB is the start of a new transfer, re-enable
1313 * the endpoint. Otherwise mark it as a continuation URB.
1315 if (uurb->flags & USBDEVFS_URB_BULK_CONTINUATION)
1316 as->bulk_status = AS_CONTINUATION;
1318 ps->disabled_bulk_eps &= ~(1 << as->bulk_addr);
1320 /* Don't accept continuation URBs if the endpoint is
1321 * disabled because of an earlier error.
1323 if (ps->disabled_bulk_eps & (1 << as->bulk_addr))
1326 ret = usb_submit_urb(as->urb, GFP_ATOMIC);
1327 spin_unlock_irq(&ps->lock);
1329 ret = usb_submit_urb(as->urb, GFP_KERNEL);
1333 dev_printk(KERN_DEBUG, &ps->dev->dev,
1334 "usbfs: usb_submit_urb returned %d\n", ret);
1335 snoop_urb(ps->dev, as->userurb, as->urb->pipe,
1336 0, ret, COMPLETE, NULL, 0);
1337 async_removepending(as);
1344 static int proc_submiturb(struct dev_state *ps, void __user *arg)
1346 struct usbdevfs_urb uurb;
1348 if (copy_from_user(&uurb, arg, sizeof(uurb)))
1351 return proc_do_submiturb(ps, &uurb,
1352 (((struct usbdevfs_urb __user *)arg)->iso_frame_desc),
1356 static int proc_unlinkurb(struct dev_state *ps, void __user *arg)
1360 unsigned long flags;
1362 spin_lock_irqsave(&ps->lock, flags);
1363 as = async_getpending(ps, arg);
1365 spin_unlock_irqrestore(&ps->lock, flags);
1371 spin_unlock_irqrestore(&ps->lock, flags);
1379 static int processcompl(struct async *as, void __user * __user *arg)
1381 struct urb *urb = as->urb;
1382 struct usbdevfs_urb __user *userurb = as->userurb;
1383 void __user *addr = as->userurb;
1386 if (as->userbuffer && urb->actual_length) {
1387 if (urb->number_of_packets > 0) /* Isochronous */
1388 i = urb->transfer_buffer_length;
1390 i = urb->actual_length;
1391 if (copy_to_user(as->userbuffer, urb->transfer_buffer, i))
1394 if (put_user(as->status, &userurb->status))
1396 if (put_user(urb->actual_length, &userurb->actual_length))
1398 if (put_user(urb->error_count, &userurb->error_count))
1401 if (usb_endpoint_xfer_isoc(&urb->ep->desc)) {
1402 for (i = 0; i < urb->number_of_packets; i++) {
1403 if (put_user(urb->iso_frame_desc[i].actual_length,
1404 &userurb->iso_frame_desc[i].actual_length))
1406 if (put_user(urb->iso_frame_desc[i].status,
1407 &userurb->iso_frame_desc[i].status))
1412 if (put_user(addr, (void __user * __user *)arg))
1420 static struct async *reap_as(struct dev_state *ps)
1422 DECLARE_WAITQUEUE(wait, current);
1423 struct async *as = NULL;
1424 struct usb_device *dev = ps->dev;
1426 add_wait_queue(&ps->wait, &wait);
1428 __set_current_state(TASK_INTERRUPTIBLE);
1429 as = async_getcompleted(ps);
1432 if (signal_pending(current))
1434 usb_unlock_device(dev);
1436 usb_lock_device(dev);
1438 remove_wait_queue(&ps->wait, &wait);
1439 set_current_state(TASK_RUNNING);
1443 static int proc_reapurb(struct dev_state *ps, void __user *arg)
1445 struct async *as = reap_as(ps);
1447 int retval = processcompl(as, (void __user * __user *)arg);
1451 if (signal_pending(current))
1456 static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg)
1461 as = async_getcompleted(ps);
1464 retval = processcompl(as, (void __user * __user *)arg);
1470 #ifdef CONFIG_COMPAT
1471 static int proc_control_compat(struct dev_state *ps,
1472 struct usbdevfs_ctrltransfer32 __user *p32)
1474 struct usbdevfs_ctrltransfer __user *p;
1476 p = compat_alloc_user_space(sizeof(*p));
1477 if (copy_in_user(p, p32, (sizeof(*p32) - sizeof(compat_caddr_t))) ||
1478 get_user(udata, &p32->data) ||
1479 put_user(compat_ptr(udata), &p->data))
1481 return proc_control(ps, p);
1484 static int proc_bulk_compat(struct dev_state *ps,
1485 struct usbdevfs_bulktransfer32 __user *p32)
1487 struct usbdevfs_bulktransfer __user *p;
1489 compat_caddr_t addr;
1491 p = compat_alloc_user_space(sizeof(*p));
1493 if (get_user(n, &p32->ep) || put_user(n, &p->ep) ||
1494 get_user(n, &p32->len) || put_user(n, &p->len) ||
1495 get_user(n, &p32->timeout) || put_user(n, &p->timeout) ||
1496 get_user(addr, &p32->data) || put_user(compat_ptr(addr), &p->data))
1499 return proc_bulk(ps, p);
1501 static int proc_disconnectsignal_compat(struct dev_state *ps, void __user *arg)
1503 struct usbdevfs_disconnectsignal32 ds;
1505 if (copy_from_user(&ds, arg, sizeof(ds)))
1507 ps->discsignr = ds.signr;
1508 ps->disccontext = compat_ptr(ds.context);
1512 static int get_urb32(struct usbdevfs_urb *kurb,
1513 struct usbdevfs_urb32 __user *uurb)
1516 if (!access_ok(VERIFY_READ, uurb, sizeof(*uurb)) ||
1517 __get_user(kurb->type, &uurb->type) ||
1518 __get_user(kurb->endpoint, &uurb->endpoint) ||
1519 __get_user(kurb->status, &uurb->status) ||
1520 __get_user(kurb->flags, &uurb->flags) ||
1521 __get_user(kurb->buffer_length, &uurb->buffer_length) ||
1522 __get_user(kurb->actual_length, &uurb->actual_length) ||
1523 __get_user(kurb->start_frame, &uurb->start_frame) ||
1524 __get_user(kurb->number_of_packets, &uurb->number_of_packets) ||
1525 __get_user(kurb->error_count, &uurb->error_count) ||
1526 __get_user(kurb->signr, &uurb->signr))
1529 if (__get_user(uptr, &uurb->buffer))
1531 kurb->buffer = compat_ptr(uptr);
1532 if (__get_user(uptr, &uurb->usercontext))
1534 kurb->usercontext = compat_ptr(uptr);
1539 static int proc_submiturb_compat(struct dev_state *ps, void __user *arg)
1541 struct usbdevfs_urb uurb;
1543 if (get_urb32(&uurb, (struct usbdevfs_urb32 __user *)arg))
1546 return proc_do_submiturb(ps, &uurb,
1547 ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc,
1551 static int processcompl_compat(struct async *as, void __user * __user *arg)
1553 struct urb *urb = as->urb;
1554 struct usbdevfs_urb32 __user *userurb = as->userurb;
1555 void __user *addr = as->userurb;
1558 if (as->userbuffer && urb->actual_length)
1559 if (copy_to_user(as->userbuffer, urb->transfer_buffer,
1560 urb->actual_length))
1562 if (put_user(as->status, &userurb->status))
1564 if (put_user(urb->actual_length, &userurb->actual_length))
1566 if (put_user(urb->error_count, &userurb->error_count))
1569 if (usb_endpoint_xfer_isoc(&urb->ep->desc)) {
1570 for (i = 0; i < urb->number_of_packets; i++) {
1571 if (put_user(urb->iso_frame_desc[i].actual_length,
1572 &userurb->iso_frame_desc[i].actual_length))
1574 if (put_user(urb->iso_frame_desc[i].status,
1575 &userurb->iso_frame_desc[i].status))
1580 if (put_user(ptr_to_compat(addr), (u32 __user *)arg))
1585 static int proc_reapurb_compat(struct dev_state *ps, void __user *arg)
1587 struct async *as = reap_as(ps);
1589 int retval = processcompl_compat(as, (void __user * __user *)arg);
1593 if (signal_pending(current))
1598 static int proc_reapurbnonblock_compat(struct dev_state *ps, void __user *arg)
1604 as = async_getcompleted(ps);
1606 retval = processcompl_compat(as, (void __user * __user *)arg);
1615 static int proc_disconnectsignal(struct dev_state *ps, void __user *arg)
1617 struct usbdevfs_disconnectsignal ds;
1619 if (copy_from_user(&ds, arg, sizeof(ds)))
1621 ps->discsignr = ds.signr;
1622 ps->disccontext = ds.context;
1626 static int proc_claiminterface(struct dev_state *ps, void __user *arg)
1630 if (get_user(ifnum, (unsigned int __user *)arg))
1632 return claimintf(ps, ifnum);
1635 static int proc_releaseinterface(struct dev_state *ps, void __user *arg)
1640 if (get_user(ifnum, (unsigned int __user *)arg))
1642 if ((ret = releaseintf(ps, ifnum)) < 0)
1644 destroy_async_on_interface (ps, ifnum);
1648 static int proc_ioctl(struct dev_state *ps, struct usbdevfs_ioctl *ctl)
1653 struct usb_interface *intf = NULL;
1654 struct usb_driver *driver = NULL;
1657 if ((size = _IOC_SIZE(ctl->ioctl_code)) > 0) {
1658 if ((buf = kmalloc(size, GFP_KERNEL)) == NULL)
1660 if ((_IOC_DIR(ctl->ioctl_code) & _IOC_WRITE)) {
1661 if (copy_from_user(buf, ctl->data, size)) {
1666 memset(buf, 0, size);
1670 if (!connected(ps)) {
1675 if (ps->dev->state != USB_STATE_CONFIGURED)
1676 retval = -EHOSTUNREACH;
1677 else if (!(intf = usb_ifnum_to_if(ps->dev, ctl->ifno)))
1679 else switch (ctl->ioctl_code) {
1681 /* disconnect kernel driver from interface */
1682 case USBDEVFS_DISCONNECT:
1683 if (intf->dev.driver) {
1684 driver = to_usb_driver(intf->dev.driver);
1685 dev_dbg(&intf->dev, "disconnect by usbfs\n");
1686 usb_driver_release_interface(driver, intf);
1691 /* let kernel drivers try to (re)bind to the interface */
1692 case USBDEVFS_CONNECT:
1693 if (!intf->dev.driver)
1694 retval = device_attach(&intf->dev);
1699 /* talk directly to the interface's driver */
1701 if (intf->dev.driver)
1702 driver = to_usb_driver(intf->dev.driver);
1703 if (driver == NULL || driver->unlocked_ioctl == NULL) {
1706 retval = driver->unlocked_ioctl(intf, ctl->ioctl_code, buf);
1707 if (retval == -ENOIOCTLCMD)
1712 /* cleanup and return */
1714 && (_IOC_DIR(ctl->ioctl_code) & _IOC_READ) != 0
1716 && copy_to_user(ctl->data, buf, size) != 0)
1723 static int proc_ioctl_default(struct dev_state *ps, void __user *arg)
1725 struct usbdevfs_ioctl ctrl;
1727 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
1729 return proc_ioctl(ps, &ctrl);
1732 #ifdef CONFIG_COMPAT
1733 static int proc_ioctl_compat(struct dev_state *ps, compat_uptr_t arg)
1735 struct usbdevfs_ioctl32 __user *uioc;
1736 struct usbdevfs_ioctl ctrl;
1739 uioc = compat_ptr((long)arg);
1740 if (!access_ok(VERIFY_READ, uioc, sizeof(*uioc)) ||
1741 __get_user(ctrl.ifno, &uioc->ifno) ||
1742 __get_user(ctrl.ioctl_code, &uioc->ioctl_code) ||
1743 __get_user(udata, &uioc->data))
1745 ctrl.data = compat_ptr(udata);
1747 return proc_ioctl(ps, &ctrl);
1751 static int proc_claim_port(struct dev_state *ps, void __user *arg)
1756 if (get_user(portnum, (unsigned __user *) arg))
1758 rc = usb_hub_claim_port(ps->dev, portnum, ps);
1760 snoop(&ps->dev->dev, "port %d claimed by process %d: %s\n",
1761 portnum, task_pid_nr(current), current->comm);
1765 static int proc_release_port(struct dev_state *ps, void __user *arg)
1769 if (get_user(portnum, (unsigned __user *) arg))
1771 return usb_hub_release_port(ps->dev, portnum, ps);
1775 * NOTE: All requests here that have interface numbers as parameters
1776 * are assuming that somehow the configuration has been prevented from
1777 * changing. But there's no mechanism to ensure that...
1779 static long usbdev_do_ioctl(struct file *file, unsigned int cmd,
1782 struct dev_state *ps = file->private_data;
1783 struct inode *inode = file->f_path.dentry->d_inode;
1784 struct usb_device *dev = ps->dev;
1787 if (!(file->f_mode & FMODE_WRITE))
1790 usb_lock_device(dev);
1791 if (!connected(ps)) {
1792 usb_unlock_device(dev);
1797 case USBDEVFS_CONTROL:
1798 snoop(&dev->dev, "%s: CONTROL\n", __func__);
1799 ret = proc_control(ps, p);
1801 inode->i_mtime = CURRENT_TIME;
1805 snoop(&dev->dev, "%s: BULK\n", __func__);
1806 ret = proc_bulk(ps, p);
1808 inode->i_mtime = CURRENT_TIME;
1811 case USBDEVFS_RESETEP:
1812 snoop(&dev->dev, "%s: RESETEP\n", __func__);
1813 ret = proc_resetep(ps, p);
1815 inode->i_mtime = CURRENT_TIME;
1818 case USBDEVFS_RESET:
1819 snoop(&dev->dev, "%s: RESET\n", __func__);
1820 ret = proc_resetdevice(ps);
1823 case USBDEVFS_CLEAR_HALT:
1824 snoop(&dev->dev, "%s: CLEAR_HALT\n", __func__);
1825 ret = proc_clearhalt(ps, p);
1827 inode->i_mtime = CURRENT_TIME;
1830 case USBDEVFS_GETDRIVER:
1831 snoop(&dev->dev, "%s: GETDRIVER\n", __func__);
1832 ret = proc_getdriver(ps, p);
1835 case USBDEVFS_CONNECTINFO:
1836 snoop(&dev->dev, "%s: CONNECTINFO\n", __func__);
1837 ret = proc_connectinfo(ps, p);
1840 case USBDEVFS_SETINTERFACE:
1841 snoop(&dev->dev, "%s: SETINTERFACE\n", __func__);
1842 ret = proc_setintf(ps, p);
1845 case USBDEVFS_SETCONFIGURATION:
1846 snoop(&dev->dev, "%s: SETCONFIGURATION\n", __func__);
1847 ret = proc_setconfig(ps, p);
1850 case USBDEVFS_SUBMITURB:
1851 snoop(&dev->dev, "%s: SUBMITURB\n", __func__);
1852 ret = proc_submiturb(ps, p);
1854 inode->i_mtime = CURRENT_TIME;
1857 #ifdef CONFIG_COMPAT
1858 case USBDEVFS_CONTROL32:
1859 snoop(&dev->dev, "%s: CONTROL32\n", __func__);
1860 ret = proc_control_compat(ps, p);
1862 inode->i_mtime = CURRENT_TIME;
1865 case USBDEVFS_BULK32:
1866 snoop(&dev->dev, "%s: BULK32\n", __func__);
1867 ret = proc_bulk_compat(ps, p);
1869 inode->i_mtime = CURRENT_TIME;
1872 case USBDEVFS_DISCSIGNAL32:
1873 snoop(&dev->dev, "%s: DISCSIGNAL32\n", __func__);
1874 ret = proc_disconnectsignal_compat(ps, p);
1877 case USBDEVFS_SUBMITURB32:
1878 snoop(&dev->dev, "%s: SUBMITURB32\n", __func__);
1879 ret = proc_submiturb_compat(ps, p);
1881 inode->i_mtime = CURRENT_TIME;
1884 case USBDEVFS_REAPURB32:
1885 snoop(&dev->dev, "%s: REAPURB32\n", __func__);
1886 ret = proc_reapurb_compat(ps, p);
1889 case USBDEVFS_REAPURBNDELAY32:
1890 snoop(&dev->dev, "%s: REAPURBNDELAY32\n", __func__);
1891 ret = proc_reapurbnonblock_compat(ps, p);
1894 case USBDEVFS_IOCTL32:
1895 snoop(&dev->dev, "%s: IOCTL32\n", __func__);
1896 ret = proc_ioctl_compat(ps, ptr_to_compat(p));
1900 case USBDEVFS_DISCARDURB:
1901 snoop(&dev->dev, "%s: DISCARDURB\n", __func__);
1902 ret = proc_unlinkurb(ps, p);
1905 case USBDEVFS_REAPURB:
1906 snoop(&dev->dev, "%s: REAPURB\n", __func__);
1907 ret = proc_reapurb(ps, p);
1910 case USBDEVFS_REAPURBNDELAY:
1911 snoop(&dev->dev, "%s: REAPURBNDELAY\n", __func__);
1912 ret = proc_reapurbnonblock(ps, p);
1915 case USBDEVFS_DISCSIGNAL:
1916 snoop(&dev->dev, "%s: DISCSIGNAL\n", __func__);
1917 ret = proc_disconnectsignal(ps, p);
1920 case USBDEVFS_CLAIMINTERFACE:
1921 snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __func__);
1922 ret = proc_claiminterface(ps, p);
1925 case USBDEVFS_RELEASEINTERFACE:
1926 snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __func__);
1927 ret = proc_releaseinterface(ps, p);
1930 case USBDEVFS_IOCTL:
1931 snoop(&dev->dev, "%s: IOCTL\n", __func__);
1932 ret = proc_ioctl_default(ps, p);
1935 case USBDEVFS_CLAIM_PORT:
1936 snoop(&dev->dev, "%s: CLAIM_PORT\n", __func__);
1937 ret = proc_claim_port(ps, p);
1940 case USBDEVFS_RELEASE_PORT:
1941 snoop(&dev->dev, "%s: RELEASE_PORT\n", __func__);
1942 ret = proc_release_port(ps, p);
1945 usb_unlock_device(dev);
1947 inode->i_atime = CURRENT_TIME;
1951 static long usbdev_ioctl(struct file *file, unsigned int cmd,
1956 ret = usbdev_do_ioctl(file, cmd, (void __user *)arg);
1961 #ifdef CONFIG_COMPAT
1962 static long usbdev_compat_ioctl(struct file *file, unsigned int cmd,
1967 ret = usbdev_do_ioctl(file, cmd, compat_ptr(arg));
1973 /* No kernel lock - fine */
1974 static unsigned int usbdev_poll(struct file *file,
1975 struct poll_table_struct *wait)
1977 struct dev_state *ps = file->private_data;
1978 unsigned int mask = 0;
1980 poll_wait(file, &ps->wait, wait);
1981 if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed))
1982 mask |= POLLOUT | POLLWRNORM;
1984 mask |= POLLERR | POLLHUP;
1988 const struct file_operations usbdev_file_operations = {
1989 .owner = THIS_MODULE,
1990 .llseek = usbdev_lseek,
1991 .read = usbdev_read,
1992 .poll = usbdev_poll,
1993 .unlocked_ioctl = usbdev_ioctl,
1994 #ifdef CONFIG_COMPAT
1995 .compat_ioctl = usbdev_compat_ioctl,
1997 .open = usbdev_open,
1998 .release = usbdev_release,
2001 static void usbdev_remove(struct usb_device *udev)
2003 struct dev_state *ps;
2004 struct siginfo sinfo;
2006 while (!list_empty(&udev->filelist)) {
2007 ps = list_entry(udev->filelist.next, struct dev_state, list);
2008 destroy_all_async(ps);
2009 wake_up_all(&ps->wait);
2010 list_del_init(&ps->list);
2011 if (ps->discsignr) {
2012 sinfo.si_signo = ps->discsignr;
2013 sinfo.si_errno = EPIPE;
2014 sinfo.si_code = SI_ASYNCIO;
2015 sinfo.si_addr = ps->disccontext;
2016 kill_pid_info_as_cred(ps->discsignr, &sinfo,
2017 ps->disc_pid, ps->cred, ps->secid);
2022 #ifdef CONFIG_USB_DEVICE_CLASS
2023 static struct class *usb_classdev_class;
2025 static int usb_classdev_add(struct usb_device *dev)
2027 struct device *cldev;
2029 cldev = device_create(usb_classdev_class, &dev->dev, dev->dev.devt,
2030 NULL, "usbdev%d.%d", dev->bus->busnum,
2033 return PTR_ERR(cldev);
2034 dev->usb_classdev = cldev;
2038 static void usb_classdev_remove(struct usb_device *dev)
2040 if (dev->usb_classdev)
2041 device_unregister(dev->usb_classdev);
2045 #define usb_classdev_add(dev) 0
2046 #define usb_classdev_remove(dev) do {} while (0)
2050 static int usbdev_notify(struct notifier_block *self,
2051 unsigned long action, void *dev)
2054 case USB_DEVICE_ADD:
2055 if (usb_classdev_add(dev))
2058 case USB_DEVICE_REMOVE:
2059 usb_classdev_remove(dev);
2066 static struct notifier_block usbdev_nb = {
2067 .notifier_call = usbdev_notify,
2070 static struct cdev usb_device_cdev;
2072 int __init usb_devio_init(void)
2076 retval = register_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX,
2079 printk(KERN_ERR "Unable to register minors for usb_device\n");
2082 cdev_init(&usb_device_cdev, &usbdev_file_operations);
2083 retval = cdev_add(&usb_device_cdev, USB_DEVICE_DEV, USB_DEVICE_MAX);
2085 printk(KERN_ERR "Unable to get usb_device major %d\n",
2089 #ifdef CONFIG_USB_DEVICE_CLASS
2090 usb_classdev_class = class_create(THIS_MODULE, "usb_device");
2091 if (IS_ERR(usb_classdev_class)) {
2092 printk(KERN_ERR "Unable to register usb_device class\n");
2093 retval = PTR_ERR(usb_classdev_class);
2094 cdev_del(&usb_device_cdev);
2095 usb_classdev_class = NULL;
2098 /* devices of this class shadow the major:minor of their parent
2099 * device, so clear ->dev_kobj to prevent adding duplicate entries
2102 usb_classdev_class->dev_kobj = NULL;
2104 usb_register_notify(&usbdev_nb);
2109 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
2113 void usb_devio_cleanup(void)
2115 usb_unregister_notify(&usbdev_nb);
2116 #ifdef CONFIG_USB_DEVICE_CLASS
2117 class_destroy(usb_classdev_class);
2119 cdev_del(&usb_device_cdev);
2120 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);