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 %pK, ep%d %s-%s, "
330 userurb, ep, t, d, length);
332 dev_info(&udev->dev, "userurb %pK, 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 memset(&sinfo, 0, sizeof(sinfo));
410 sinfo.si_signo = as->signr;
411 sinfo.si_errno = as->status;
412 sinfo.si_code = SI_ASYNCIO;
413 sinfo.si_addr = as->userurb;
414 pid = get_pid(as->pid);
415 cred = get_cred(as->cred);
418 snoop(&urb->dev->dev, "urb complete\n");
419 snoop_urb(urb->dev, as->userurb, urb->pipe, urb->actual_length,
420 as->status, COMPLETE,
421 ((urb->transfer_flags & URB_DIR_MASK) == USB_DIR_OUT) ?
422 NULL : urb->transfer_buffer, urb->actual_length);
423 if (as->status < 0 && as->bulk_addr && as->status != -ECONNRESET &&
424 as->status != -ENOENT)
425 cancel_bulk_urbs(ps, as->bulk_addr);
428 spin_unlock(&ps->lock);
431 kill_pid_info_as_cred(sinfo.si_signo, &sinfo, pid, cred, secid);
437 static void destroy_async(struct dev_state *ps, struct list_head *list)
443 spin_lock_irqsave(&ps->lock, flags);
444 while (!list_empty(list)) {
445 as = list_entry(list->next, struct async, asynclist);
446 list_del_init(&as->asynclist);
450 /* drop the spinlock so the completion handler can run */
451 spin_unlock_irqrestore(&ps->lock, flags);
454 spin_lock_irqsave(&ps->lock, flags);
456 spin_unlock_irqrestore(&ps->lock, flags);
459 static void destroy_async_on_interface(struct dev_state *ps,
462 struct list_head *p, *q, hitlist;
465 INIT_LIST_HEAD(&hitlist);
466 spin_lock_irqsave(&ps->lock, flags);
467 list_for_each_safe(p, q, &ps->async_pending)
468 if (ifnum == list_entry(p, struct async, asynclist)->ifnum)
469 list_move_tail(p, &hitlist);
470 spin_unlock_irqrestore(&ps->lock, flags);
471 destroy_async(ps, &hitlist);
474 static void destroy_all_async(struct dev_state *ps)
476 destroy_async(ps, &ps->async_pending);
480 * interface claims are made only at the request of user level code,
481 * which can also release them (explicitly or by closing files).
482 * they're also undone when devices disconnect.
485 static int driver_probe(struct usb_interface *intf,
486 const struct usb_device_id *id)
491 static void driver_disconnect(struct usb_interface *intf)
493 struct dev_state *ps = usb_get_intfdata(intf);
494 unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber;
499 /* NOTE: this relies on usbcore having canceled and completed
500 * all pending I/O requests; 2.6 does that.
503 if (likely(ifnum < 8*sizeof(ps->ifclaimed)))
504 clear_bit(ifnum, &ps->ifclaimed);
506 dev_warn(&intf->dev, "interface number %u out of range\n",
509 usb_set_intfdata(intf, NULL);
511 /* force async requests to complete */
512 destroy_async_on_interface(ps, ifnum);
515 /* The following routines are merely placeholders. There is no way
516 * to inform a user task about suspend or resumes.
518 static int driver_suspend(struct usb_interface *intf, pm_message_t msg)
523 static int driver_resume(struct usb_interface *intf)
528 struct usb_driver usbfs_driver = {
530 .probe = driver_probe,
531 .disconnect = driver_disconnect,
532 .suspend = driver_suspend,
533 .resume = driver_resume,
536 static int claimintf(struct dev_state *ps, unsigned int ifnum)
538 struct usb_device *dev = ps->dev;
539 struct usb_interface *intf;
542 if (ifnum >= 8*sizeof(ps->ifclaimed))
544 /* already claimed */
545 if (test_bit(ifnum, &ps->ifclaimed))
548 intf = usb_ifnum_to_if(dev, ifnum);
552 err = usb_driver_claim_interface(&usbfs_driver, intf, ps);
554 set_bit(ifnum, &ps->ifclaimed);
558 static int releaseintf(struct dev_state *ps, unsigned int ifnum)
560 struct usb_device *dev;
561 struct usb_interface *intf;
565 if (ifnum >= 8*sizeof(ps->ifclaimed))
568 intf = usb_ifnum_to_if(dev, ifnum);
571 else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) {
572 usb_driver_release_interface(&usbfs_driver, intf);
578 static int checkintf(struct dev_state *ps, unsigned int ifnum)
580 if (ps->dev->state != USB_STATE_CONFIGURED)
581 return -EHOSTUNREACH;
582 if (ifnum >= 8*sizeof(ps->ifclaimed))
584 if (test_bit(ifnum, &ps->ifclaimed))
586 /* if not yet claimed, claim it for the driver */
587 dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim "
588 "interface %u before use\n", task_pid_nr(current),
589 current->comm, ifnum);
590 return claimintf(ps, ifnum);
593 static int findintfep(struct usb_device *dev, unsigned int ep)
595 unsigned int i, j, e;
596 struct usb_interface *intf;
597 struct usb_host_interface *alts;
598 struct usb_endpoint_descriptor *endpt;
600 if (ep & ~(USB_DIR_IN|0xf))
604 for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) {
605 intf = dev->actconfig->interface[i];
606 for (j = 0; j < intf->num_altsetting; j++) {
607 alts = &intf->altsetting[j];
608 for (e = 0; e < alts->desc.bNumEndpoints; e++) {
609 endpt = &alts->endpoint[e].desc;
610 if (endpt->bEndpointAddress == ep)
611 return alts->desc.bInterfaceNumber;
618 static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype,
619 unsigned int request, unsigned int index)
622 struct usb_host_interface *alt_setting;
624 if (ps->dev->state != USB_STATE_UNAUTHENTICATED
625 && ps->dev->state != USB_STATE_ADDRESS
626 && ps->dev->state != USB_STATE_CONFIGURED)
627 return -EHOSTUNREACH;
628 if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype))
632 * check for the special corner case 'get_device_id' in the printer
633 * class specification, where wIndex is (interface << 8 | altsetting)
634 * instead of just interface
636 if (requesttype == 0xa1 && request == 0) {
637 alt_setting = usb_find_alt_setting(ps->dev->actconfig,
638 index >> 8, index & 0xff);
640 && alt_setting->desc.bInterfaceClass == USB_CLASS_PRINTER)
645 switch (requesttype & USB_RECIP_MASK) {
646 case USB_RECIP_ENDPOINT:
647 if ((index & ~USB_DIR_IN) == 0)
649 ret = findintfep(ps->dev, index);
652 * Some not fully compliant Win apps seem to get
653 * index wrong and have the endpoint number here
654 * rather than the endpoint address (with the
655 * correct direction). Win does let this through,
656 * so we'll not reject it here but leave it to
657 * the device to not break KVM. But we warn.
659 ret = findintfep(ps->dev, index ^ 0x80);
661 dev_info(&ps->dev->dev,
662 "%s: process %i (%s) requesting ep %02x but needs %02x\n",
663 __func__, task_pid_nr(current),
664 current->comm, index, index ^ 0x80);
667 ret = checkintf(ps, ret);
670 case USB_RECIP_INTERFACE:
671 ret = checkintf(ps, index);
677 static int match_devt(struct device *dev, void *data)
679 return dev->devt == (dev_t) (unsigned long) data;
682 static struct usb_device *usbdev_lookup_by_devt(dev_t devt)
686 dev = bus_find_device(&usb_bus_type, NULL,
687 (void *) (unsigned long) devt, match_devt);
690 return container_of(dev, struct usb_device, dev);
696 static int usbdev_open(struct inode *inode, struct file *file)
698 struct usb_device *dev = NULL;
699 struct dev_state *ps;
703 ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL);
709 /* Protect against simultaneous removal or release */
710 mutex_lock(&usbfs_mutex);
712 /* usbdev device-node */
713 if (imajor(inode) == USB_DEVICE_MAJOR)
714 dev = usbdev_lookup_by_devt(inode->i_rdev);
716 #ifdef CONFIG_USB_DEVICEFS
719 dev = inode->i_private;
720 if (dev && dev->usbfs_dentry &&
721 dev->usbfs_dentry->d_inode == inode)
727 mutex_unlock(&usbfs_mutex);
732 usb_lock_device(dev);
733 if (dev->state == USB_STATE_NOTATTACHED)
734 goto out_unlock_device;
736 ret = usb_autoresume_device(dev);
738 goto out_unlock_device;
742 spin_lock_init(&ps->lock);
743 INIT_LIST_HEAD(&ps->list);
744 INIT_LIST_HEAD(&ps->async_pending);
745 INIT_LIST_HEAD(&ps->async_completed);
746 init_waitqueue_head(&ps->wait);
748 ps->disc_pid = get_pid(task_pid(current));
749 ps->cred = get_current_cred();
750 ps->disccontext = NULL;
752 security_task_getsecid(current, &ps->secid);
754 list_add_tail(&ps->list, &dev->filelist);
755 file->private_data = ps;
756 usb_unlock_device(dev);
757 snoop(&dev->dev, "opened by process %d: %s\n", task_pid_nr(current),
762 usb_unlock_device(dev);
769 static int usbdev_release(struct inode *inode, struct file *file)
771 struct dev_state *ps = file->private_data;
772 struct usb_device *dev = ps->dev;
776 usb_lock_device(dev);
777 usb_hub_release_all_ports(dev, ps);
779 list_del_init(&ps->list);
781 for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed);
783 if (test_bit(ifnum, &ps->ifclaimed))
784 releaseintf(ps, ifnum);
786 destroy_all_async(ps);
787 usb_autosuspend_device(dev);
788 usb_unlock_device(dev);
790 put_pid(ps->disc_pid);
793 as = async_getcompleted(ps);
796 as = async_getcompleted(ps);
802 static int proc_control(struct dev_state *ps, void __user *arg)
804 struct usb_device *dev = ps->dev;
805 struct usbdevfs_ctrltransfer ctrl;
811 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
813 ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.bRequest,
817 wLength = ctrl.wLength; /* To suppress 64k PAGE_SIZE warning */
818 if (wLength > PAGE_SIZE)
820 tbuf = (unsigned char *)__get_free_page(GFP_KERNEL);
824 snoop(&dev->dev, "control urb: bRequestType=%02x "
825 "bRequest=%02x wValue=%04x "
826 "wIndex=%04x wLength=%04x\n",
827 ctrl.bRequestType, ctrl.bRequest,
828 __le16_to_cpup(&ctrl.wValue),
829 __le16_to_cpup(&ctrl.wIndex),
830 __le16_to_cpup(&ctrl.wLength));
831 if (ctrl.bRequestType & 0x80) {
832 if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data,
834 free_page((unsigned long)tbuf);
837 pipe = usb_rcvctrlpipe(dev, 0);
838 snoop_urb(dev, NULL, pipe, ctrl.wLength, tmo, SUBMIT, NULL, 0);
840 usb_unlock_device(dev);
841 i = usb_control_msg(dev, pipe, ctrl.bRequest,
842 ctrl.bRequestType, ctrl.wValue, ctrl.wIndex,
843 tbuf, ctrl.wLength, tmo);
844 usb_lock_device(dev);
845 snoop_urb(dev, NULL, pipe, max(i, 0), min(i, 0), COMPLETE,
847 if ((i > 0) && ctrl.wLength) {
848 if (copy_to_user(ctrl.data, tbuf, i)) {
849 free_page((unsigned long)tbuf);
855 if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) {
856 free_page((unsigned long)tbuf);
860 pipe = usb_sndctrlpipe(dev, 0);
861 snoop_urb(dev, NULL, pipe, ctrl.wLength, tmo, SUBMIT,
864 usb_unlock_device(dev);
865 i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest,
866 ctrl.bRequestType, ctrl.wValue, ctrl.wIndex,
867 tbuf, ctrl.wLength, tmo);
868 usb_lock_device(dev);
869 snoop_urb(dev, NULL, pipe, max(i, 0), min(i, 0), COMPLETE, NULL, 0);
871 free_page((unsigned long)tbuf);
872 if (i < 0 && i != -EPIPE) {
873 dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL "
874 "failed cmd %s rqt %u rq %u len %u ret %d\n",
875 current->comm, ctrl.bRequestType, ctrl.bRequest,
881 static int proc_bulk(struct dev_state *ps, void __user *arg)
883 struct usb_device *dev = ps->dev;
884 struct usbdevfs_bulktransfer bulk;
885 unsigned int tmo, len1, pipe;
890 if (copy_from_user(&bulk, arg, sizeof(bulk)))
892 ret = findintfep(ps->dev, bulk.ep);
895 ret = checkintf(ps, ret);
898 if (bulk.ep & USB_DIR_IN)
899 pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f);
901 pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f);
902 if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN)))
905 if (len1 > MAX_USBFS_BUFFER_SIZE)
907 if (!(tbuf = kmalloc(len1, GFP_KERNEL)))
910 if (bulk.ep & 0x80) {
911 if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) {
915 snoop_urb(dev, NULL, pipe, len1, tmo, SUBMIT, NULL, 0);
917 usb_unlock_device(dev);
918 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
919 usb_lock_device(dev);
920 snoop_urb(dev, NULL, pipe, len2, i, COMPLETE, tbuf, len2);
923 if (copy_to_user(bulk.data, tbuf, len2)) {
930 if (copy_from_user(tbuf, bulk.data, len1)) {
935 snoop_urb(dev, NULL, pipe, len1, tmo, SUBMIT, tbuf, len1);
937 usb_unlock_device(dev);
938 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
939 usb_lock_device(dev);
940 snoop_urb(dev, NULL, pipe, len2, i, COMPLETE, NULL, 0);
948 static int proc_resetep(struct dev_state *ps, void __user *arg)
953 if (get_user(ep, (unsigned int __user *)arg))
955 ret = findintfep(ps->dev, ep);
958 ret = checkintf(ps, ret);
961 usb_reset_endpoint(ps->dev, ep);
965 static int proc_clearhalt(struct dev_state *ps, void __user *arg)
971 if (get_user(ep, (unsigned int __user *)arg))
973 ret = findintfep(ps->dev, ep);
976 ret = checkintf(ps, ret);
980 pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f);
982 pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f);
984 return usb_clear_halt(ps->dev, pipe);
987 static int proc_getdriver(struct dev_state *ps, void __user *arg)
989 struct usbdevfs_getdriver gd;
990 struct usb_interface *intf;
993 if (copy_from_user(&gd, arg, sizeof(gd)))
995 intf = usb_ifnum_to_if(ps->dev, gd.interface);
996 if (!intf || !intf->dev.driver)
999 strncpy(gd.driver, intf->dev.driver->name,
1001 ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0);
1006 static int proc_connectinfo(struct dev_state *ps, void __user *arg)
1008 struct usbdevfs_connectinfo ci;
1010 memset(&ci, 0, sizeof(ci));
1011 ci.devnum = ps->dev->devnum;
1012 ci.slow = ps->dev->speed == USB_SPEED_LOW;
1014 if (copy_to_user(arg, &ci, sizeof(ci)))
1019 static int proc_resetdevice(struct dev_state *ps)
1021 return usb_reset_device(ps->dev);
1024 static int proc_setintf(struct dev_state *ps, void __user *arg)
1026 struct usbdevfs_setinterface setintf;
1029 if (copy_from_user(&setintf, arg, sizeof(setintf)))
1031 if ((ret = checkintf(ps, setintf.interface)))
1033 return usb_set_interface(ps->dev, setintf.interface,
1034 setintf.altsetting);
1037 static int proc_setconfig(struct dev_state *ps, void __user *arg)
1041 struct usb_host_config *actconfig;
1043 if (get_user(u, (int __user *)arg))
1046 actconfig = ps->dev->actconfig;
1048 /* Don't touch the device if any interfaces are claimed.
1049 * It could interfere with other drivers' operations, and if
1050 * an interface is claimed by usbfs it could easily deadlock.
1055 for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) {
1056 if (usb_interface_claimed(actconfig->interface[i])) {
1057 dev_warn(&ps->dev->dev,
1058 "usbfs: interface %d claimed by %s "
1059 "while '%s' sets config #%d\n",
1060 actconfig->interface[i]
1062 ->desc.bInterfaceNumber,
1063 actconfig->interface[i]
1072 /* SET_CONFIGURATION is often abused as a "cheap" driver reset,
1073 * so avoid usb_set_configuration()'s kick to sysfs
1076 if (actconfig && actconfig->desc.bConfigurationValue == u)
1077 status = usb_reset_configuration(ps->dev);
1079 status = usb_set_configuration(ps->dev, u);
1085 static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
1086 struct usbdevfs_iso_packet_desc __user *iso_frame_desc,
1089 struct usbdevfs_iso_packet_desc *isopkt = NULL;
1090 struct usb_host_endpoint *ep;
1092 struct usb_ctrlrequest *dr = NULL;
1093 unsigned int u, totlen, isofrmlen;
1094 int ret, ifnum = -1;
1096 unsigned long mask = USBDEVFS_URB_SHORT_NOT_OK |
1097 USBDEVFS_URB_BULK_CONTINUATION |
1098 USBDEVFS_URB_NO_FSBR |
1099 USBDEVFS_URB_ZERO_PACKET |
1100 USBDEVFS_URB_NO_INTERRUPT;
1101 /* USBDEVFS_URB_ISO_ASAP is a special case */
1102 if (uurb->type == USBDEVFS_URB_TYPE_ISO)
1103 mask |= USBDEVFS_URB_ISO_ASAP;
1105 if (uurb->flags & ~mask)
1108 if (uurb->buffer_length > 0 && !uurb->buffer)
1110 if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL &&
1111 (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) {
1112 ifnum = findintfep(ps->dev, uurb->endpoint);
1115 ret = checkintf(ps, ifnum);
1119 if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0) {
1121 ep = ps->dev->ep_in[uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
1124 ep = ps->dev->ep_out[uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
1128 switch(uurb->type) {
1129 case USBDEVFS_URB_TYPE_CONTROL:
1130 if (!usb_endpoint_xfer_control(&ep->desc))
1132 /* min 8 byte setup packet,
1133 * max 8 byte setup plus an arbitrary data stage */
1134 if (uurb->buffer_length < 8 ||
1135 uurb->buffer_length > (8 + MAX_USBFS_BUFFER_SIZE))
1137 dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL);
1140 if (copy_from_user(dr, uurb->buffer, 8)) {
1144 if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) {
1148 ret = check_ctrlrecip(ps, dr->bRequestType, dr->bRequest,
1149 le16_to_cpup(&dr->wIndex));
1154 uurb->number_of_packets = 0;
1155 uurb->buffer_length = le16_to_cpup(&dr->wLength);
1157 if ((dr->bRequestType & USB_DIR_IN) && uurb->buffer_length) {
1159 uurb->endpoint |= USB_DIR_IN;
1162 uurb->endpoint &= ~USB_DIR_IN;
1164 snoop(&ps->dev->dev, "control urb: bRequestType=%02x "
1165 "bRequest=%02x wValue=%04x "
1166 "wIndex=%04x wLength=%04x\n",
1167 dr->bRequestType, dr->bRequest,
1168 __le16_to_cpup(&dr->wValue),
1169 __le16_to_cpup(&dr->wIndex),
1170 __le16_to_cpup(&dr->wLength));
1173 case USBDEVFS_URB_TYPE_BULK:
1174 switch (usb_endpoint_type(&ep->desc)) {
1175 case USB_ENDPOINT_XFER_CONTROL:
1176 case USB_ENDPOINT_XFER_ISOC:
1178 case USB_ENDPOINT_XFER_INT:
1179 /* allow single-shot interrupt transfers */
1180 uurb->type = USBDEVFS_URB_TYPE_INTERRUPT;
1183 uurb->number_of_packets = 0;
1184 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE)
1188 case USBDEVFS_URB_TYPE_INTERRUPT:
1189 if (!usb_endpoint_xfer_int(&ep->desc))
1192 uurb->number_of_packets = 0;
1193 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE)
1197 case USBDEVFS_URB_TYPE_ISO:
1198 /* arbitrary limit */
1199 if (uurb->number_of_packets < 1 ||
1200 uurb->number_of_packets > 128)
1202 if (!usb_endpoint_xfer_isoc(&ep->desc))
1204 isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) *
1205 uurb->number_of_packets;
1206 if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL)))
1208 if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) {
1212 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
1214 * sufficient for USB 2.0 high-bandwidth iso */
1215 if (isopkt[u].length > 8192) {
1219 totlen += isopkt[u].length;
1221 /* 3072 * 64 microframes */
1222 if (totlen > 196608) {
1226 uurb->buffer_length = totlen;
1232 if (uurb->buffer_length > 0 &&
1233 !access_ok(is_in ? VERIFY_WRITE : VERIFY_READ,
1234 uurb->buffer, uurb->buffer_length)) {
1239 as = alloc_async(uurb->number_of_packets);
1245 if (uurb->buffer_length > 0) {
1246 as->urb->transfer_buffer = kmalloc(uurb->buffer_length,
1248 if (!as->urb->transfer_buffer) {
1254 /* Isochronous input data may end up being discontiguous
1255 * if some of the packets are short. Clear the buffer so
1256 * that the gaps don't leak kernel data to userspace.
1258 if (is_in && uurb->type == USBDEVFS_URB_TYPE_ISO)
1259 memset(as->urb->transfer_buffer, 0,
1260 uurb->buffer_length);
1262 as->urb->dev = ps->dev;
1263 as->urb->pipe = (uurb->type << 30) |
1264 __create_pipe(ps->dev, uurb->endpoint & 0xf) |
1265 (uurb->endpoint & USB_DIR_IN);
1267 /* This tedious sequence is necessary because the URB_* flags
1268 * are internal to the kernel and subject to change, whereas
1269 * the USBDEVFS_URB_* flags are a user API and must not be changed.
1271 u = (is_in ? URB_DIR_IN : URB_DIR_OUT);
1272 if (uurb->flags & USBDEVFS_URB_ISO_ASAP)
1274 if (uurb->flags & USBDEVFS_URB_SHORT_NOT_OK)
1275 u |= URB_SHORT_NOT_OK;
1276 if (uurb->flags & USBDEVFS_URB_NO_FSBR)
1278 if (uurb->flags & USBDEVFS_URB_ZERO_PACKET)
1279 u |= URB_ZERO_PACKET;
1280 if (uurb->flags & USBDEVFS_URB_NO_INTERRUPT)
1281 u |= URB_NO_INTERRUPT;
1282 as->urb->transfer_flags = u;
1284 as->urb->transfer_buffer_length = uurb->buffer_length;
1285 as->urb->setup_packet = (unsigned char *)dr;
1286 as->urb->start_frame = uurb->start_frame;
1287 as->urb->number_of_packets = uurb->number_of_packets;
1289 if (ep->desc.bInterval) {
1290 if (uurb->type == USBDEVFS_URB_TYPE_ISO ||
1291 ps->dev->speed == USB_SPEED_HIGH ||
1292 ps->dev->speed >= USB_SPEED_SUPER)
1293 as->urb->interval = 1 <<
1294 min(15, ep->desc.bInterval - 1);
1296 as->urb->interval = ep->desc.bInterval;
1299 as->urb->context = as;
1300 as->urb->complete = async_completed;
1301 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
1302 as->urb->iso_frame_desc[u].offset = totlen;
1303 as->urb->iso_frame_desc[u].length = isopkt[u].length;
1304 totlen += isopkt[u].length;
1309 if (is_in && uurb->buffer_length > 0)
1310 as->userbuffer = uurb->buffer;
1312 as->userbuffer = NULL;
1313 as->signr = uurb->signr;
1315 as->pid = get_pid(task_pid(current));
1316 as->cred = get_current_cred();
1317 security_task_getsecid(current, &as->secid);
1318 if (!is_in && uurb->buffer_length > 0) {
1319 if (copy_from_user(as->urb->transfer_buffer, uurb->buffer,
1320 uurb->buffer_length)) {
1325 snoop_urb(ps->dev, as->userurb, as->urb->pipe,
1326 as->urb->transfer_buffer_length, 0, SUBMIT,
1327 is_in ? NULL : as->urb->transfer_buffer,
1328 uurb->buffer_length);
1329 async_newpending(as);
1331 if (usb_endpoint_xfer_bulk(&ep->desc)) {
1332 spin_lock_irq(&ps->lock);
1334 /* Not exactly the endpoint address; the direction bit is
1335 * shifted to the 0x10 position so that the value will be
1338 as->bulk_addr = usb_endpoint_num(&ep->desc) |
1339 ((ep->desc.bEndpointAddress & USB_ENDPOINT_DIR_MASK)
1342 /* If this bulk URB is the start of a new transfer, re-enable
1343 * the endpoint. Otherwise mark it as a continuation URB.
1345 if (uurb->flags & USBDEVFS_URB_BULK_CONTINUATION)
1346 as->bulk_status = AS_CONTINUATION;
1348 ps->disabled_bulk_eps &= ~(1 << as->bulk_addr);
1350 /* Don't accept continuation URBs if the endpoint is
1351 * disabled because of an earlier error.
1353 if (ps->disabled_bulk_eps & (1 << as->bulk_addr))
1356 ret = usb_submit_urb(as->urb, GFP_ATOMIC);
1357 spin_unlock_irq(&ps->lock);
1359 ret = usb_submit_urb(as->urb, GFP_KERNEL);
1363 dev_printk(KERN_DEBUG, &ps->dev->dev,
1364 "usbfs: usb_submit_urb returned %d\n", ret);
1365 snoop_urb(ps->dev, as->userurb, as->urb->pipe,
1366 0, ret, COMPLETE, NULL, 0);
1367 async_removepending(as);
1374 static int proc_submiturb(struct dev_state *ps, void __user *arg)
1376 struct usbdevfs_urb uurb;
1378 if (copy_from_user(&uurb, arg, sizeof(uurb)))
1381 return proc_do_submiturb(ps, &uurb,
1382 (((struct usbdevfs_urb __user *)arg)->iso_frame_desc),
1386 static int proc_unlinkurb(struct dev_state *ps, void __user *arg)
1390 unsigned long flags;
1392 spin_lock_irqsave(&ps->lock, flags);
1393 as = async_getpending(ps, arg);
1395 spin_unlock_irqrestore(&ps->lock, flags);
1401 spin_unlock_irqrestore(&ps->lock, flags);
1409 static void compute_isochronous_actual_length(struct urb *urb)
1413 if (urb->number_of_packets > 0) {
1414 urb->actual_length = 0;
1415 for (i = 0; i < urb->number_of_packets; i++)
1416 urb->actual_length +=
1417 urb->iso_frame_desc[i].actual_length;
1421 static int processcompl(struct async *as, void __user * __user *arg)
1423 struct urb *urb = as->urb;
1424 struct usbdevfs_urb __user *userurb = as->userurb;
1425 void __user *addr = as->userurb;
1428 compute_isochronous_actual_length(urb);
1429 if (as->userbuffer && urb->actual_length) {
1430 if (urb->number_of_packets > 0) /* Isochronous */
1431 i = urb->transfer_buffer_length;
1433 i = urb->actual_length;
1434 if (copy_to_user(as->userbuffer, urb->transfer_buffer, i))
1437 if (put_user(as->status, &userurb->status))
1439 if (put_user(urb->actual_length, &userurb->actual_length))
1441 if (put_user(urb->error_count, &userurb->error_count))
1444 if (usb_endpoint_xfer_isoc(&urb->ep->desc)) {
1445 for (i = 0; i < urb->number_of_packets; i++) {
1446 if (put_user(urb->iso_frame_desc[i].actual_length,
1447 &userurb->iso_frame_desc[i].actual_length))
1449 if (put_user(urb->iso_frame_desc[i].status,
1450 &userurb->iso_frame_desc[i].status))
1455 if (put_user(addr, (void __user * __user *)arg))
1463 static struct async *reap_as(struct dev_state *ps)
1465 DECLARE_WAITQUEUE(wait, current);
1466 struct async *as = NULL;
1467 struct usb_device *dev = ps->dev;
1469 add_wait_queue(&ps->wait, &wait);
1471 __set_current_state(TASK_INTERRUPTIBLE);
1472 as = async_getcompleted(ps);
1475 if (signal_pending(current))
1477 usb_unlock_device(dev);
1479 usb_lock_device(dev);
1481 remove_wait_queue(&ps->wait, &wait);
1482 set_current_state(TASK_RUNNING);
1486 static int proc_reapurb(struct dev_state *ps, void __user *arg)
1488 struct async *as = reap_as(ps);
1490 int retval = processcompl(as, (void __user * __user *)arg);
1494 if (signal_pending(current))
1499 static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg)
1504 as = async_getcompleted(ps);
1507 retval = processcompl(as, (void __user * __user *)arg);
1513 #ifdef CONFIG_COMPAT
1514 static int proc_control_compat(struct dev_state *ps,
1515 struct usbdevfs_ctrltransfer32 __user *p32)
1517 struct usbdevfs_ctrltransfer __user *p;
1519 p = compat_alloc_user_space(sizeof(*p));
1520 if (copy_in_user(p, p32, (sizeof(*p32) - sizeof(compat_caddr_t))) ||
1521 get_user(udata, &p32->data) ||
1522 put_user(compat_ptr(udata), &p->data))
1524 return proc_control(ps, p);
1527 static int proc_bulk_compat(struct dev_state *ps,
1528 struct usbdevfs_bulktransfer32 __user *p32)
1530 struct usbdevfs_bulktransfer __user *p;
1532 compat_caddr_t addr;
1534 p = compat_alloc_user_space(sizeof(*p));
1536 if (get_user(n, &p32->ep) || put_user(n, &p->ep) ||
1537 get_user(n, &p32->len) || put_user(n, &p->len) ||
1538 get_user(n, &p32->timeout) || put_user(n, &p->timeout) ||
1539 get_user(addr, &p32->data) || put_user(compat_ptr(addr), &p->data))
1542 return proc_bulk(ps, p);
1544 static int proc_disconnectsignal_compat(struct dev_state *ps, void __user *arg)
1546 struct usbdevfs_disconnectsignal32 ds;
1548 if (copy_from_user(&ds, arg, sizeof(ds)))
1550 ps->discsignr = ds.signr;
1551 ps->disccontext = compat_ptr(ds.context);
1555 static int get_urb32(struct usbdevfs_urb *kurb,
1556 struct usbdevfs_urb32 __user *uurb)
1559 if (!access_ok(VERIFY_READ, uurb, sizeof(*uurb)) ||
1560 __get_user(kurb->type, &uurb->type) ||
1561 __get_user(kurb->endpoint, &uurb->endpoint) ||
1562 __get_user(kurb->status, &uurb->status) ||
1563 __get_user(kurb->flags, &uurb->flags) ||
1564 __get_user(kurb->buffer_length, &uurb->buffer_length) ||
1565 __get_user(kurb->actual_length, &uurb->actual_length) ||
1566 __get_user(kurb->start_frame, &uurb->start_frame) ||
1567 __get_user(kurb->number_of_packets, &uurb->number_of_packets) ||
1568 __get_user(kurb->error_count, &uurb->error_count) ||
1569 __get_user(kurb->signr, &uurb->signr))
1572 if (__get_user(uptr, &uurb->buffer))
1574 kurb->buffer = compat_ptr(uptr);
1575 if (__get_user(uptr, &uurb->usercontext))
1577 kurb->usercontext = compat_ptr(uptr);
1582 static int proc_submiturb_compat(struct dev_state *ps, void __user *arg)
1584 struct usbdevfs_urb uurb;
1586 if (get_urb32(&uurb, (struct usbdevfs_urb32 __user *)arg))
1589 return proc_do_submiturb(ps, &uurb,
1590 ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc,
1594 static int processcompl_compat(struct async *as, void __user * __user *arg)
1596 struct urb *urb = as->urb;
1597 struct usbdevfs_urb32 __user *userurb = as->userurb;
1598 void __user *addr = as->userurb;
1601 compute_isochronous_actual_length(urb);
1602 if (as->userbuffer && urb->actual_length) {
1603 if (urb->number_of_packets > 0) /* Isochronous */
1604 i = urb->transfer_buffer_length;
1606 i = urb->actual_length;
1607 if (copy_to_user(as->userbuffer, urb->transfer_buffer, i))
1610 if (put_user(as->status, &userurb->status))
1612 if (put_user(urb->actual_length, &userurb->actual_length))
1614 if (put_user(urb->error_count, &userurb->error_count))
1617 if (usb_endpoint_xfer_isoc(&urb->ep->desc)) {
1618 for (i = 0; i < urb->number_of_packets; i++) {
1619 if (put_user(urb->iso_frame_desc[i].actual_length,
1620 &userurb->iso_frame_desc[i].actual_length))
1622 if (put_user(urb->iso_frame_desc[i].status,
1623 &userurb->iso_frame_desc[i].status))
1628 if (put_user(ptr_to_compat(addr), (u32 __user *)arg))
1633 static int proc_reapurb_compat(struct dev_state *ps, void __user *arg)
1635 struct async *as = reap_as(ps);
1637 int retval = processcompl_compat(as, (void __user * __user *)arg);
1641 if (signal_pending(current))
1646 static int proc_reapurbnonblock_compat(struct dev_state *ps, void __user *arg)
1652 as = async_getcompleted(ps);
1654 retval = processcompl_compat(as, (void __user * __user *)arg);
1663 static int proc_disconnectsignal(struct dev_state *ps, void __user *arg)
1665 struct usbdevfs_disconnectsignal ds;
1667 if (copy_from_user(&ds, arg, sizeof(ds)))
1669 ps->discsignr = ds.signr;
1670 ps->disccontext = ds.context;
1674 static int proc_claiminterface(struct dev_state *ps, void __user *arg)
1678 if (get_user(ifnum, (unsigned int __user *)arg))
1680 return claimintf(ps, ifnum);
1683 static int proc_releaseinterface(struct dev_state *ps, void __user *arg)
1688 if (get_user(ifnum, (unsigned int __user *)arg))
1690 if ((ret = releaseintf(ps, ifnum)) < 0)
1692 destroy_async_on_interface (ps, ifnum);
1696 static int proc_ioctl(struct dev_state *ps, struct usbdevfs_ioctl *ctl)
1701 struct usb_interface *intf = NULL;
1702 struct usb_driver *driver = NULL;
1705 if ((size = _IOC_SIZE(ctl->ioctl_code)) > 0) {
1706 if ((buf = kmalloc(size, GFP_KERNEL)) == NULL)
1708 if ((_IOC_DIR(ctl->ioctl_code) & _IOC_WRITE)) {
1709 if (copy_from_user(buf, ctl->data, size)) {
1714 memset(buf, 0, size);
1718 if (!connected(ps)) {
1723 if (ps->dev->state != USB_STATE_CONFIGURED)
1724 retval = -EHOSTUNREACH;
1725 else if (!(intf = usb_ifnum_to_if(ps->dev, ctl->ifno)))
1727 else switch (ctl->ioctl_code) {
1729 /* disconnect kernel driver from interface */
1730 case USBDEVFS_DISCONNECT:
1731 if (intf->dev.driver) {
1732 driver = to_usb_driver(intf->dev.driver);
1733 dev_dbg(&intf->dev, "disconnect by usbfs\n");
1734 usb_driver_release_interface(driver, intf);
1739 /* let kernel drivers try to (re)bind to the interface */
1740 case USBDEVFS_CONNECT:
1741 if (!intf->dev.driver)
1742 retval = device_attach(&intf->dev);
1747 /* talk directly to the interface's driver */
1749 if (intf->dev.driver)
1750 driver = to_usb_driver(intf->dev.driver);
1751 if (driver == NULL || driver->unlocked_ioctl == NULL) {
1754 retval = driver->unlocked_ioctl(intf, ctl->ioctl_code, buf);
1755 if (retval == -ENOIOCTLCMD)
1760 /* cleanup and return */
1762 && (_IOC_DIR(ctl->ioctl_code) & _IOC_READ) != 0
1764 && copy_to_user(ctl->data, buf, size) != 0)
1771 static int proc_ioctl_default(struct dev_state *ps, void __user *arg)
1773 struct usbdevfs_ioctl ctrl;
1775 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
1777 return proc_ioctl(ps, &ctrl);
1780 #ifdef CONFIG_COMPAT
1781 static int proc_ioctl_compat(struct dev_state *ps, compat_uptr_t arg)
1783 struct usbdevfs_ioctl32 __user *uioc;
1784 struct usbdevfs_ioctl ctrl;
1787 uioc = compat_ptr((long)arg);
1788 if (!access_ok(VERIFY_READ, uioc, sizeof(*uioc)) ||
1789 __get_user(ctrl.ifno, &uioc->ifno) ||
1790 __get_user(ctrl.ioctl_code, &uioc->ioctl_code) ||
1791 __get_user(udata, &uioc->data))
1793 ctrl.data = compat_ptr(udata);
1795 return proc_ioctl(ps, &ctrl);
1799 static int proc_claim_port(struct dev_state *ps, void __user *arg)
1804 if (get_user(portnum, (unsigned __user *) arg))
1806 rc = usb_hub_claim_port(ps->dev, portnum, ps);
1808 snoop(&ps->dev->dev, "port %d claimed by process %d: %s\n",
1809 portnum, task_pid_nr(current), current->comm);
1813 static int proc_release_port(struct dev_state *ps, void __user *arg)
1817 if (get_user(portnum, (unsigned __user *) arg))
1819 return usb_hub_release_port(ps->dev, portnum, ps);
1823 * NOTE: All requests here that have interface numbers as parameters
1824 * are assuming that somehow the configuration has been prevented from
1825 * changing. But there's no mechanism to ensure that...
1827 static long usbdev_do_ioctl(struct file *file, unsigned int cmd,
1830 struct dev_state *ps = file->private_data;
1831 struct inode *inode = file->f_path.dentry->d_inode;
1832 struct usb_device *dev = ps->dev;
1835 if (!(file->f_mode & FMODE_WRITE))
1838 usb_lock_device(dev);
1839 if (!connected(ps)) {
1840 usb_unlock_device(dev);
1845 case USBDEVFS_CONTROL:
1846 snoop(&dev->dev, "%s: CONTROL\n", __func__);
1847 ret = proc_control(ps, p);
1849 inode->i_mtime = CURRENT_TIME;
1853 snoop(&dev->dev, "%s: BULK\n", __func__);
1854 ret = proc_bulk(ps, p);
1856 inode->i_mtime = CURRENT_TIME;
1859 case USBDEVFS_RESETEP:
1860 snoop(&dev->dev, "%s: RESETEP\n", __func__);
1861 ret = proc_resetep(ps, p);
1863 inode->i_mtime = CURRENT_TIME;
1866 case USBDEVFS_RESET:
1867 snoop(&dev->dev, "%s: RESET\n", __func__);
1868 ret = proc_resetdevice(ps);
1871 case USBDEVFS_CLEAR_HALT:
1872 snoop(&dev->dev, "%s: CLEAR_HALT\n", __func__);
1873 ret = proc_clearhalt(ps, p);
1875 inode->i_mtime = CURRENT_TIME;
1878 case USBDEVFS_GETDRIVER:
1879 snoop(&dev->dev, "%s: GETDRIVER\n", __func__);
1880 ret = proc_getdriver(ps, p);
1883 case USBDEVFS_CONNECTINFO:
1884 snoop(&dev->dev, "%s: CONNECTINFO\n", __func__);
1885 ret = proc_connectinfo(ps, p);
1888 case USBDEVFS_SETINTERFACE:
1889 snoop(&dev->dev, "%s: SETINTERFACE\n", __func__);
1890 ret = proc_setintf(ps, p);
1893 case USBDEVFS_SETCONFIGURATION:
1894 snoop(&dev->dev, "%s: SETCONFIGURATION\n", __func__);
1895 ret = proc_setconfig(ps, p);
1898 case USBDEVFS_SUBMITURB:
1899 snoop(&dev->dev, "%s: SUBMITURB\n", __func__);
1900 ret = proc_submiturb(ps, p);
1902 inode->i_mtime = CURRENT_TIME;
1905 #ifdef CONFIG_COMPAT
1906 case USBDEVFS_CONTROL32:
1907 snoop(&dev->dev, "%s: CONTROL32\n", __func__);
1908 ret = proc_control_compat(ps, p);
1910 inode->i_mtime = CURRENT_TIME;
1913 case USBDEVFS_BULK32:
1914 snoop(&dev->dev, "%s: BULK32\n", __func__);
1915 ret = proc_bulk_compat(ps, p);
1917 inode->i_mtime = CURRENT_TIME;
1920 case USBDEVFS_DISCSIGNAL32:
1921 snoop(&dev->dev, "%s: DISCSIGNAL32\n", __func__);
1922 ret = proc_disconnectsignal_compat(ps, p);
1925 case USBDEVFS_SUBMITURB32:
1926 snoop(&dev->dev, "%s: SUBMITURB32\n", __func__);
1927 ret = proc_submiturb_compat(ps, p);
1929 inode->i_mtime = CURRENT_TIME;
1932 case USBDEVFS_REAPURB32:
1933 snoop(&dev->dev, "%s: REAPURB32\n", __func__);
1934 ret = proc_reapurb_compat(ps, p);
1937 case USBDEVFS_REAPURBNDELAY32:
1938 snoop(&dev->dev, "%s: REAPURBNDELAY32\n", __func__);
1939 ret = proc_reapurbnonblock_compat(ps, p);
1942 case USBDEVFS_IOCTL32:
1943 snoop(&dev->dev, "%s: IOCTL32\n", __func__);
1944 ret = proc_ioctl_compat(ps, ptr_to_compat(p));
1948 case USBDEVFS_DISCARDURB:
1949 snoop(&dev->dev, "%s: DISCARDURB\n", __func__);
1950 ret = proc_unlinkurb(ps, p);
1953 case USBDEVFS_REAPURB:
1954 snoop(&dev->dev, "%s: REAPURB\n", __func__);
1955 ret = proc_reapurb(ps, p);
1958 case USBDEVFS_REAPURBNDELAY:
1959 snoop(&dev->dev, "%s: REAPURBNDELAY\n", __func__);
1960 ret = proc_reapurbnonblock(ps, p);
1963 case USBDEVFS_DISCSIGNAL:
1964 snoop(&dev->dev, "%s: DISCSIGNAL\n", __func__);
1965 ret = proc_disconnectsignal(ps, p);
1968 case USBDEVFS_CLAIMINTERFACE:
1969 snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __func__);
1970 ret = proc_claiminterface(ps, p);
1973 case USBDEVFS_RELEASEINTERFACE:
1974 snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __func__);
1975 ret = proc_releaseinterface(ps, p);
1978 case USBDEVFS_IOCTL:
1979 snoop(&dev->dev, "%s: IOCTL\n", __func__);
1980 ret = proc_ioctl_default(ps, p);
1983 case USBDEVFS_CLAIM_PORT:
1984 snoop(&dev->dev, "%s: CLAIM_PORT\n", __func__);
1985 ret = proc_claim_port(ps, p);
1988 case USBDEVFS_RELEASE_PORT:
1989 snoop(&dev->dev, "%s: RELEASE_PORT\n", __func__);
1990 ret = proc_release_port(ps, p);
1993 usb_unlock_device(dev);
1995 inode->i_atime = CURRENT_TIME;
1999 static long usbdev_ioctl(struct file *file, unsigned int cmd,
2004 ret = usbdev_do_ioctl(file, cmd, (void __user *)arg);
2009 #ifdef CONFIG_COMPAT
2010 static long usbdev_compat_ioctl(struct file *file, unsigned int cmd,
2015 ret = usbdev_do_ioctl(file, cmd, compat_ptr(arg));
2021 /* No kernel lock - fine */
2022 static unsigned int usbdev_poll(struct file *file,
2023 struct poll_table_struct *wait)
2025 struct dev_state *ps = file->private_data;
2026 unsigned int mask = 0;
2028 poll_wait(file, &ps->wait, wait);
2029 if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed))
2030 mask |= POLLOUT | POLLWRNORM;
2032 mask |= POLLERR | POLLHUP;
2036 const struct file_operations usbdev_file_operations = {
2037 .owner = THIS_MODULE,
2038 .llseek = usbdev_lseek,
2039 .read = usbdev_read,
2040 .poll = usbdev_poll,
2041 .unlocked_ioctl = usbdev_ioctl,
2042 #ifdef CONFIG_COMPAT
2043 .compat_ioctl = usbdev_compat_ioctl,
2045 .open = usbdev_open,
2046 .release = usbdev_release,
2049 static void usbdev_remove(struct usb_device *udev)
2051 struct dev_state *ps;
2052 struct siginfo sinfo;
2054 while (!list_empty(&udev->filelist)) {
2055 ps = list_entry(udev->filelist.next, struct dev_state, list);
2056 destroy_all_async(ps);
2057 wake_up_all(&ps->wait);
2058 list_del_init(&ps->list);
2059 if (ps->discsignr) {
2060 memset(&sinfo, 0, sizeof(sinfo));
2061 sinfo.si_signo = ps->discsignr;
2062 sinfo.si_errno = EPIPE;
2063 sinfo.si_code = SI_ASYNCIO;
2064 sinfo.si_addr = ps->disccontext;
2065 kill_pid_info_as_cred(ps->discsignr, &sinfo,
2066 ps->disc_pid, ps->cred, ps->secid);
2071 #ifdef CONFIG_USB_DEVICE_CLASS
2072 static struct class *usb_classdev_class;
2074 static int usb_classdev_add(struct usb_device *dev)
2076 struct device *cldev;
2078 cldev = device_create(usb_classdev_class, &dev->dev, dev->dev.devt,
2079 NULL, "usbdev%d.%d", dev->bus->busnum,
2082 return PTR_ERR(cldev);
2083 dev->usb_classdev = cldev;
2087 static void usb_classdev_remove(struct usb_device *dev)
2089 if (dev->usb_classdev)
2090 device_unregister(dev->usb_classdev);
2094 #define usb_classdev_add(dev) 0
2095 #define usb_classdev_remove(dev) do {} while (0)
2099 static int usbdev_notify(struct notifier_block *self,
2100 unsigned long action, void *dev)
2103 case USB_DEVICE_ADD:
2104 if (usb_classdev_add(dev))
2107 case USB_DEVICE_REMOVE:
2108 usb_classdev_remove(dev);
2115 static struct notifier_block usbdev_nb = {
2116 .notifier_call = usbdev_notify,
2119 static struct cdev usb_device_cdev;
2121 int __init usb_devio_init(void)
2125 retval = register_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX,
2128 printk(KERN_ERR "Unable to register minors for usb_device\n");
2131 cdev_init(&usb_device_cdev, &usbdev_file_operations);
2132 retval = cdev_add(&usb_device_cdev, USB_DEVICE_DEV, USB_DEVICE_MAX);
2134 printk(KERN_ERR "Unable to get usb_device major %d\n",
2138 #ifdef CONFIG_USB_DEVICE_CLASS
2139 usb_classdev_class = class_create(THIS_MODULE, "usb_device");
2140 if (IS_ERR(usb_classdev_class)) {
2141 printk(KERN_ERR "Unable to register usb_device class\n");
2142 retval = PTR_ERR(usb_classdev_class);
2143 cdev_del(&usb_device_cdev);
2144 usb_classdev_class = NULL;
2147 /* devices of this class shadow the major:minor of their parent
2148 * device, so clear ->dev_kobj to prevent adding duplicate entries
2151 usb_classdev_class->dev_kobj = NULL;
2153 usb_register_notify(&usbdev_nb);
2158 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
2162 void usb_devio_cleanup(void)
2164 usb_unregister_notify(&usbdev_nb);
2165 #ifdef CONFIG_USB_DEVICE_CLASS
2166 class_destroy(usb_classdev_class);
2168 cdev_del(&usb_device_cdev);
2169 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);