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;
89 unsigned int mem_usage;
96 static bool usbfs_snoop;
97 module_param(usbfs_snoop, bool, S_IRUGO | S_IWUSR);
98 MODULE_PARM_DESC(usbfs_snoop, "true to log all usbfs traffic");
100 #define snoop(dev, format, arg...) \
103 dev_info(dev , format , ## arg); \
110 #define USB_DEVICE_DEV MKDEV(USB_DEVICE_MAJOR, 0)
112 /* Limit on the total amount of memory we can allocate for transfers */
113 static unsigned usbfs_memory_mb = 16;
114 module_param(usbfs_memory_mb, uint, 0644);
115 MODULE_PARM_DESC(usbfs_memory_mb,
116 "maximum MB allowed for usbfs buffers (0 = no limit)");
118 /* Hard limit, necessary to avoid aithmetic overflow */
119 #define USBFS_XFER_MAX (UINT_MAX / 2 - 1000000)
121 static atomic_t usbfs_memory_usage; /* Total memory currently allocated */
123 /* Check whether it's okay to allocate more memory for a transfer */
124 static int usbfs_increase_memory_usage(unsigned amount)
129 * Convert usbfs_memory_mb to bytes, avoiding overflows.
130 * 0 means use the hard limit (effectively unlimited).
132 lim = ACCESS_ONCE(usbfs_memory_mb);
133 if (lim == 0 || lim > (USBFS_XFER_MAX >> 20))
134 lim = USBFS_XFER_MAX;
138 atomic_add(amount, &usbfs_memory_usage);
139 if (atomic_read(&usbfs_memory_usage) <= lim)
141 atomic_sub(amount, &usbfs_memory_usage);
145 /* Memory for a transfer is being deallocated */
146 static void usbfs_decrease_memory_usage(unsigned amount)
148 atomic_sub(amount, &usbfs_memory_usage);
151 static int connected(struct dev_state *ps)
153 return (!list_empty(&ps->list) &&
154 ps->dev->state != USB_STATE_NOTATTACHED);
157 static loff_t usbdev_lseek(struct file *file, loff_t offset, int orig)
161 mutex_lock(&file->f_dentry->d_inode->i_mutex);
165 file->f_pos = offset;
169 file->f_pos += offset;
177 mutex_unlock(&file->f_dentry->d_inode->i_mutex);
181 static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes,
184 struct dev_state *ps = file->private_data;
185 struct usb_device *dev = ps->dev;
192 usb_lock_device(dev);
193 if (!connected(ps)) {
196 } else if (pos < 0) {
201 if (pos < sizeof(struct usb_device_descriptor)) {
202 /* 18 bytes - fits on the stack */
203 struct usb_device_descriptor temp_desc;
205 memcpy(&temp_desc, &dev->descriptor, sizeof(dev->descriptor));
206 le16_to_cpus(&temp_desc.bcdUSB);
207 le16_to_cpus(&temp_desc.idVendor);
208 le16_to_cpus(&temp_desc.idProduct);
209 le16_to_cpus(&temp_desc.bcdDevice);
211 len = sizeof(struct usb_device_descriptor) - pos;
214 if (copy_to_user(buf, ((char *)&temp_desc) + pos, len)) {
225 pos = sizeof(struct usb_device_descriptor);
226 for (i = 0; nbytes && i < dev->descriptor.bNumConfigurations; i++) {
227 struct usb_config_descriptor *config =
228 (struct usb_config_descriptor *)dev->rawdescriptors[i];
229 unsigned int length = le16_to_cpu(config->wTotalLength);
231 if (*ppos < pos + length) {
233 /* The descriptor may claim to be longer than it
234 * really is. Here is the actual allocated length. */
236 le16_to_cpu(dev->config[i].desc.wTotalLength);
238 len = length - (*ppos - pos);
242 /* Simply don't write (skip over) unallocated parts */
243 if (alloclen > (*ppos - pos)) {
244 alloclen -= (*ppos - pos);
245 if (copy_to_user(buf,
246 dev->rawdescriptors[i] + (*ppos - pos),
247 min(len, alloclen))) {
263 usb_unlock_device(dev);
268 * async list handling
271 static struct async *alloc_async(unsigned int numisoframes)
275 as = kzalloc(sizeof(struct async), GFP_KERNEL);
278 as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL);
286 static void free_async(struct async *as)
291 kfree(as->urb->transfer_buffer);
292 kfree(as->urb->setup_packet);
293 usb_free_urb(as->urb);
294 usbfs_decrease_memory_usage(as->mem_usage);
298 static void async_newpending(struct async *as)
300 struct dev_state *ps = as->ps;
303 spin_lock_irqsave(&ps->lock, flags);
304 list_add_tail(&as->asynclist, &ps->async_pending);
305 spin_unlock_irqrestore(&ps->lock, flags);
308 static void async_removepending(struct async *as)
310 struct dev_state *ps = as->ps;
313 spin_lock_irqsave(&ps->lock, flags);
314 list_del_init(&as->asynclist);
315 spin_unlock_irqrestore(&ps->lock, flags);
318 static struct async *async_getcompleted(struct dev_state *ps)
321 struct async *as = NULL;
323 spin_lock_irqsave(&ps->lock, flags);
324 if (!list_empty(&ps->async_completed)) {
325 as = list_entry(ps->async_completed.next, struct async,
327 list_del_init(&as->asynclist);
329 spin_unlock_irqrestore(&ps->lock, flags);
333 static struct async *async_getpending(struct dev_state *ps,
334 void __user *userurb)
338 list_for_each_entry(as, &ps->async_pending, asynclist)
339 if (as->userurb == userurb) {
340 list_del_init(&as->asynclist);
347 static void snoop_urb(struct usb_device *udev,
348 void __user *userurb, int pipe, unsigned length,
349 int timeout_or_status, enum snoop_when when,
350 unsigned char *data, unsigned data_len)
352 static const char *types[] = {"isoc", "int", "ctrl", "bulk"};
353 static const char *dirs[] = {"out", "in"};
360 ep = usb_pipeendpoint(pipe);
361 t = types[usb_pipetype(pipe)];
362 d = dirs[!!usb_pipein(pipe)];
364 if (userurb) { /* Async */
366 dev_info(&udev->dev, "userurb %p, ep%d %s-%s, "
368 userurb, ep, t, d, length);
370 dev_info(&udev->dev, "userurb %p, ep%d %s-%s, "
371 "actual_length %u status %d\n",
372 userurb, ep, t, d, length,
376 dev_info(&udev->dev, "ep%d %s-%s, length %u, "
378 ep, t, d, length, timeout_or_status);
380 dev_info(&udev->dev, "ep%d %s-%s, actual_length %u, "
382 ep, t, d, length, timeout_or_status);
385 if (data && data_len > 0) {
386 print_hex_dump(KERN_DEBUG, "data: ", DUMP_PREFIX_NONE, 32, 1,
391 #define AS_CONTINUATION 1
394 static void cancel_bulk_urbs(struct dev_state *ps, unsigned bulk_addr)
401 /* Mark all the pending URBs that match bulk_addr, up to but not
402 * including the first one without AS_CONTINUATION. If such an
403 * URB is encountered then a new transfer has already started so
404 * the endpoint doesn't need to be disabled; otherwise it does.
406 list_for_each_entry(as, &ps->async_pending, asynclist) {
407 if (as->bulk_addr == bulk_addr) {
408 if (as->bulk_status != AS_CONTINUATION)
410 as->bulk_status = AS_UNLINK;
414 ps->disabled_bulk_eps |= (1 << bulk_addr);
416 /* Now carefully unlink all the marked pending URBs */
418 list_for_each_entry(as, &ps->async_pending, asynclist) {
419 if (as->bulk_status == AS_UNLINK) {
420 as->bulk_status = 0; /* Only once */
423 spin_unlock(&ps->lock); /* Allow completions */
426 spin_lock(&ps->lock);
432 static void async_completed(struct urb *urb)
434 struct async *as = urb->context;
435 struct dev_state *ps = as->ps;
436 struct siginfo sinfo;
437 struct pid *pid = NULL;
439 const struct cred *cred = NULL;
442 spin_lock(&ps->lock);
443 list_move_tail(&as->asynclist, &ps->async_completed);
444 as->status = urb->status;
447 sinfo.si_signo = as->signr;
448 sinfo.si_errno = as->status;
449 sinfo.si_code = SI_ASYNCIO;
450 sinfo.si_addr = as->userurb;
451 pid = get_pid(as->pid);
452 cred = get_cred(as->cred);
455 snoop(&urb->dev->dev, "urb complete\n");
456 snoop_urb(urb->dev, as->userurb, urb->pipe, urb->actual_length,
457 as->status, COMPLETE,
458 ((urb->transfer_flags & URB_DIR_MASK) == USB_DIR_OUT) ?
459 NULL : urb->transfer_buffer, urb->actual_length);
460 if (as->status < 0 && as->bulk_addr && as->status != -ECONNRESET &&
461 as->status != -ENOENT)
462 cancel_bulk_urbs(ps, as->bulk_addr);
463 spin_unlock(&ps->lock);
466 kill_pid_info_as_cred(sinfo.si_signo, &sinfo, pid, cred, secid);
474 static void destroy_async(struct dev_state *ps, struct list_head *list)
480 spin_lock_irqsave(&ps->lock, flags);
481 while (!list_empty(list)) {
482 as = list_entry(list->next, struct async, asynclist);
483 list_del_init(&as->asynclist);
487 /* drop the spinlock so the completion handler can run */
488 spin_unlock_irqrestore(&ps->lock, flags);
491 spin_lock_irqsave(&ps->lock, flags);
493 spin_unlock_irqrestore(&ps->lock, flags);
496 static void destroy_async_on_interface(struct dev_state *ps,
499 struct list_head *p, *q, hitlist;
502 INIT_LIST_HEAD(&hitlist);
503 spin_lock_irqsave(&ps->lock, flags);
504 list_for_each_safe(p, q, &ps->async_pending)
505 if (ifnum == list_entry(p, struct async, asynclist)->ifnum)
506 list_move_tail(p, &hitlist);
507 spin_unlock_irqrestore(&ps->lock, flags);
508 destroy_async(ps, &hitlist);
511 static void destroy_all_async(struct dev_state *ps)
513 destroy_async(ps, &ps->async_pending);
517 * interface claims are made only at the request of user level code,
518 * which can also release them (explicitly or by closing files).
519 * they're also undone when devices disconnect.
522 static int driver_probe(struct usb_interface *intf,
523 const struct usb_device_id *id)
528 static void driver_disconnect(struct usb_interface *intf)
530 struct dev_state *ps = usb_get_intfdata(intf);
531 unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber;
536 /* NOTE: this relies on usbcore having canceled and completed
537 * all pending I/O requests; 2.6 does that.
540 if (likely(ifnum < 8*sizeof(ps->ifclaimed)))
541 clear_bit(ifnum, &ps->ifclaimed);
543 dev_warn(&intf->dev, "interface number %u out of range\n",
546 usb_set_intfdata(intf, NULL);
548 /* force async requests to complete */
549 destroy_async_on_interface(ps, ifnum);
552 /* The following routines are merely placeholders. There is no way
553 * to inform a user task about suspend or resumes.
555 static int driver_suspend(struct usb_interface *intf, pm_message_t msg)
560 static int driver_resume(struct usb_interface *intf)
565 struct usb_driver usbfs_driver = {
567 .probe = driver_probe,
568 .disconnect = driver_disconnect,
569 .suspend = driver_suspend,
570 .resume = driver_resume,
573 static int claimintf(struct dev_state *ps, unsigned int ifnum)
575 struct usb_device *dev = ps->dev;
576 struct usb_interface *intf;
579 if (ifnum >= 8*sizeof(ps->ifclaimed))
581 /* already claimed */
582 if (test_bit(ifnum, &ps->ifclaimed))
585 intf = usb_ifnum_to_if(dev, ifnum);
589 err = usb_driver_claim_interface(&usbfs_driver, intf, ps);
591 set_bit(ifnum, &ps->ifclaimed);
595 static int releaseintf(struct dev_state *ps, unsigned int ifnum)
597 struct usb_device *dev;
598 struct usb_interface *intf;
602 if (ifnum >= 8*sizeof(ps->ifclaimed))
605 intf = usb_ifnum_to_if(dev, ifnum);
608 else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) {
609 usb_driver_release_interface(&usbfs_driver, intf);
615 static int checkintf(struct dev_state *ps, unsigned int ifnum)
617 if (ps->dev->state != USB_STATE_CONFIGURED)
618 return -EHOSTUNREACH;
619 if (ifnum >= 8*sizeof(ps->ifclaimed))
621 if (test_bit(ifnum, &ps->ifclaimed))
623 /* if not yet claimed, claim it for the driver */
624 dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim "
625 "interface %u before use\n", task_pid_nr(current),
626 current->comm, ifnum);
627 return claimintf(ps, ifnum);
630 static int findintfep(struct usb_device *dev, unsigned int ep)
632 unsigned int i, j, e;
633 struct usb_interface *intf;
634 struct usb_host_interface *alts;
635 struct usb_endpoint_descriptor *endpt;
637 if (ep & ~(USB_DIR_IN|0xf))
641 for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) {
642 intf = dev->actconfig->interface[i];
643 for (j = 0; j < intf->num_altsetting; j++) {
644 alts = &intf->altsetting[j];
645 for (e = 0; e < alts->desc.bNumEndpoints; e++) {
646 endpt = &alts->endpoint[e].desc;
647 if (endpt->bEndpointAddress == ep)
648 return alts->desc.bInterfaceNumber;
655 static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype,
656 unsigned int request, unsigned int index)
659 struct usb_host_interface *alt_setting;
661 if (ps->dev->state != USB_STATE_UNAUTHENTICATED
662 && ps->dev->state != USB_STATE_ADDRESS
663 && ps->dev->state != USB_STATE_CONFIGURED)
664 return -EHOSTUNREACH;
665 if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype))
669 * check for the special corner case 'get_device_id' in the printer
670 * class specification, where wIndex is (interface << 8 | altsetting)
671 * instead of just interface
673 if (requesttype == 0xa1 && request == 0) {
674 alt_setting = usb_find_alt_setting(ps->dev->actconfig,
675 index >> 8, index & 0xff);
677 && alt_setting->desc.bInterfaceClass == USB_CLASS_PRINTER)
682 switch (requesttype & USB_RECIP_MASK) {
683 case USB_RECIP_ENDPOINT:
684 ret = findintfep(ps->dev, index);
686 ret = checkintf(ps, ret);
689 case USB_RECIP_INTERFACE:
690 ret = checkintf(ps, index);
696 static int match_devt(struct device *dev, void *data)
698 return dev->devt == (dev_t) (unsigned long) data;
701 static struct usb_device *usbdev_lookup_by_devt(dev_t devt)
705 dev = bus_find_device(&usb_bus_type, NULL,
706 (void *) (unsigned long) devt, match_devt);
709 return container_of(dev, struct usb_device, dev);
715 static int usbdev_open(struct inode *inode, struct file *file)
717 struct usb_device *dev = NULL;
718 struct dev_state *ps;
722 ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL);
728 /* Protect against simultaneous removal or release */
729 mutex_lock(&usbfs_mutex);
731 /* usbdev device-node */
732 if (imajor(inode) == USB_DEVICE_MAJOR)
733 dev = usbdev_lookup_by_devt(inode->i_rdev);
735 mutex_unlock(&usbfs_mutex);
740 usb_lock_device(dev);
741 if (dev->state == USB_STATE_NOTATTACHED)
742 goto out_unlock_device;
744 ret = usb_autoresume_device(dev);
746 goto out_unlock_device;
750 spin_lock_init(&ps->lock);
751 INIT_LIST_HEAD(&ps->list);
752 INIT_LIST_HEAD(&ps->async_pending);
753 INIT_LIST_HEAD(&ps->async_completed);
754 init_waitqueue_head(&ps->wait);
756 ps->disc_pid = get_pid(task_pid(current));
757 ps->cred = get_current_cred();
758 ps->disccontext = NULL;
760 security_task_getsecid(current, &ps->secid);
762 list_add_tail(&ps->list, &dev->filelist);
763 file->private_data = ps;
764 usb_unlock_device(dev);
765 snoop(&dev->dev, "opened by process %d: %s\n", task_pid_nr(current),
770 usb_unlock_device(dev);
777 static int usbdev_release(struct inode *inode, struct file *file)
779 struct dev_state *ps = file->private_data;
780 struct usb_device *dev = ps->dev;
784 usb_lock_device(dev);
785 usb_hub_release_all_ports(dev, ps);
787 list_del_init(&ps->list);
789 for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed);
791 if (test_bit(ifnum, &ps->ifclaimed))
792 releaseintf(ps, ifnum);
794 destroy_all_async(ps);
795 usb_autosuspend_device(dev);
796 usb_unlock_device(dev);
798 put_pid(ps->disc_pid);
801 as = async_getcompleted(ps);
804 as = async_getcompleted(ps);
810 static int proc_control(struct dev_state *ps, void __user *arg)
812 struct usb_device *dev = ps->dev;
813 struct usbdevfs_ctrltransfer ctrl;
819 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
821 ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.bRequest,
825 wLength = ctrl.wLength; /* To suppress 64k PAGE_SIZE warning */
826 if (wLength > PAGE_SIZE)
828 ret = usbfs_increase_memory_usage(PAGE_SIZE + sizeof(struct urb) +
829 sizeof(struct usb_ctrlrequest));
832 tbuf = (unsigned char *)__get_free_page(GFP_KERNEL);
838 snoop(&dev->dev, "control urb: bRequestType=%02x "
839 "bRequest=%02x wValue=%04x "
840 "wIndex=%04x wLength=%04x\n",
841 ctrl.bRequestType, ctrl.bRequest,
842 __le16_to_cpup(&ctrl.wValue),
843 __le16_to_cpup(&ctrl.wIndex),
844 __le16_to_cpup(&ctrl.wLength));
845 if (ctrl.bRequestType & 0x80) {
846 if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data,
851 pipe = usb_rcvctrlpipe(dev, 0);
852 snoop_urb(dev, NULL, pipe, ctrl.wLength, tmo, SUBMIT, NULL, 0);
854 usb_unlock_device(dev);
855 i = usb_control_msg(dev, pipe, ctrl.bRequest,
856 ctrl.bRequestType, ctrl.wValue, ctrl.wIndex,
857 tbuf, ctrl.wLength, tmo);
858 usb_lock_device(dev);
859 snoop_urb(dev, NULL, pipe, max(i, 0), min(i, 0), COMPLETE,
861 if ((i > 0) && ctrl.wLength) {
862 if (copy_to_user(ctrl.data, tbuf, i)) {
869 if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) {
874 pipe = usb_sndctrlpipe(dev, 0);
875 snoop_urb(dev, NULL, pipe, ctrl.wLength, tmo, SUBMIT,
878 usb_unlock_device(dev);
879 i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest,
880 ctrl.bRequestType, ctrl.wValue, ctrl.wIndex,
881 tbuf, ctrl.wLength, tmo);
882 usb_lock_device(dev);
883 snoop_urb(dev, NULL, pipe, max(i, 0), min(i, 0), COMPLETE, NULL, 0);
885 if (i < 0 && i != -EPIPE) {
886 dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL "
887 "failed cmd %s rqt %u rq %u len %u ret %d\n",
888 current->comm, ctrl.bRequestType, ctrl.bRequest,
893 free_page((unsigned long) tbuf);
894 usbfs_decrease_memory_usage(PAGE_SIZE + sizeof(struct urb) +
895 sizeof(struct usb_ctrlrequest));
899 static int proc_bulk(struct dev_state *ps, void __user *arg)
901 struct usb_device *dev = ps->dev;
902 struct usbdevfs_bulktransfer bulk;
903 unsigned int tmo, len1, pipe;
908 if (copy_from_user(&bulk, arg, sizeof(bulk)))
910 ret = findintfep(ps->dev, bulk.ep);
913 ret = checkintf(ps, ret);
916 if (bulk.ep & USB_DIR_IN)
917 pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f);
919 pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f);
920 if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN)))
923 if (len1 >= USBFS_XFER_MAX)
925 ret = usbfs_increase_memory_usage(len1 + sizeof(struct urb));
928 if (!(tbuf = kmalloc(len1, GFP_KERNEL))) {
933 if (bulk.ep & 0x80) {
934 if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) {
938 snoop_urb(dev, NULL, pipe, len1, tmo, SUBMIT, NULL, 0);
940 usb_unlock_device(dev);
941 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
942 usb_lock_device(dev);
943 snoop_urb(dev, NULL, pipe, len2, i, COMPLETE, tbuf, len2);
946 if (copy_to_user(bulk.data, tbuf, len2)) {
953 if (copy_from_user(tbuf, bulk.data, len1)) {
958 snoop_urb(dev, NULL, pipe, len1, tmo, SUBMIT, tbuf, len1);
960 usb_unlock_device(dev);
961 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
962 usb_lock_device(dev);
963 snoop_urb(dev, NULL, pipe, len2, i, COMPLETE, NULL, 0);
965 ret = (i < 0 ? i : len2);
968 usbfs_decrease_memory_usage(len1 + sizeof(struct urb));
972 static int proc_resetep(struct dev_state *ps, void __user *arg)
977 if (get_user(ep, (unsigned int __user *)arg))
979 ret = findintfep(ps->dev, ep);
982 ret = checkintf(ps, ret);
985 usb_reset_endpoint(ps->dev, ep);
989 static int proc_clearhalt(struct dev_state *ps, void __user *arg)
995 if (get_user(ep, (unsigned int __user *)arg))
997 ret = findintfep(ps->dev, ep);
1000 ret = checkintf(ps, ret);
1003 if (ep & USB_DIR_IN)
1004 pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f);
1006 pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f);
1008 return usb_clear_halt(ps->dev, pipe);
1011 static int proc_getdriver(struct dev_state *ps, void __user *arg)
1013 struct usbdevfs_getdriver gd;
1014 struct usb_interface *intf;
1017 if (copy_from_user(&gd, arg, sizeof(gd)))
1019 intf = usb_ifnum_to_if(ps->dev, gd.interface);
1020 if (!intf || !intf->dev.driver)
1023 strncpy(gd.driver, intf->dev.driver->name,
1025 ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0);
1030 static int proc_connectinfo(struct dev_state *ps, void __user *arg)
1032 struct usbdevfs_connectinfo ci = {
1033 .devnum = ps->dev->devnum,
1034 .slow = ps->dev->speed == USB_SPEED_LOW
1037 if (copy_to_user(arg, &ci, sizeof(ci)))
1042 static int proc_resetdevice(struct dev_state *ps)
1044 return usb_reset_device(ps->dev);
1047 static int proc_setintf(struct dev_state *ps, void __user *arg)
1049 struct usbdevfs_setinterface setintf;
1052 if (copy_from_user(&setintf, arg, sizeof(setintf)))
1054 if ((ret = checkintf(ps, setintf.interface)))
1056 return usb_set_interface(ps->dev, setintf.interface,
1057 setintf.altsetting);
1060 static int proc_setconfig(struct dev_state *ps, void __user *arg)
1064 struct usb_host_config *actconfig;
1066 if (get_user(u, (int __user *)arg))
1069 actconfig = ps->dev->actconfig;
1071 /* Don't touch the device if any interfaces are claimed.
1072 * It could interfere with other drivers' operations, and if
1073 * an interface is claimed by usbfs it could easily deadlock.
1078 for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) {
1079 if (usb_interface_claimed(actconfig->interface[i])) {
1080 dev_warn(&ps->dev->dev,
1081 "usbfs: interface %d claimed by %s "
1082 "while '%s' sets config #%d\n",
1083 actconfig->interface[i]
1085 ->desc.bInterfaceNumber,
1086 actconfig->interface[i]
1095 /* SET_CONFIGURATION is often abused as a "cheap" driver reset,
1096 * so avoid usb_set_configuration()'s kick to sysfs
1099 if (actconfig && actconfig->desc.bConfigurationValue == u)
1100 status = usb_reset_configuration(ps->dev);
1102 status = usb_set_configuration(ps->dev, u);
1108 static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
1109 struct usbdevfs_iso_packet_desc __user *iso_frame_desc,
1112 struct usbdevfs_iso_packet_desc *isopkt = NULL;
1113 struct usb_host_endpoint *ep;
1114 struct async *as = NULL;
1115 struct usb_ctrlrequest *dr = NULL;
1116 unsigned int u, totlen, isofrmlen;
1117 int ret, ifnum = -1;
1120 if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP |
1121 USBDEVFS_URB_SHORT_NOT_OK |
1122 USBDEVFS_URB_BULK_CONTINUATION |
1123 USBDEVFS_URB_NO_FSBR |
1124 USBDEVFS_URB_ZERO_PACKET |
1125 USBDEVFS_URB_NO_INTERRUPT))
1127 if (uurb->buffer_length > 0 && !uurb->buffer)
1129 if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL &&
1130 (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) {
1131 ifnum = findintfep(ps->dev, uurb->endpoint);
1134 ret = checkintf(ps, ifnum);
1138 if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0) {
1140 ep = ps->dev->ep_in[uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
1143 ep = ps->dev->ep_out[uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
1149 switch(uurb->type) {
1150 case USBDEVFS_URB_TYPE_CONTROL:
1151 if (!usb_endpoint_xfer_control(&ep->desc))
1153 /* min 8 byte setup packet */
1154 if (uurb->buffer_length < 8)
1156 dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL);
1159 if (copy_from_user(dr, uurb->buffer, 8)) {
1163 if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) {
1167 ret = check_ctrlrecip(ps, dr->bRequestType, dr->bRequest,
1168 le16_to_cpup(&dr->wIndex));
1171 uurb->number_of_packets = 0;
1172 uurb->buffer_length = le16_to_cpup(&dr->wLength);
1174 if ((dr->bRequestType & USB_DIR_IN) && uurb->buffer_length) {
1176 uurb->endpoint |= USB_DIR_IN;
1179 uurb->endpoint &= ~USB_DIR_IN;
1181 snoop(&ps->dev->dev, "control urb: bRequestType=%02x "
1182 "bRequest=%02x wValue=%04x "
1183 "wIndex=%04x wLength=%04x\n",
1184 dr->bRequestType, dr->bRequest,
1185 __le16_to_cpup(&dr->wValue),
1186 __le16_to_cpup(&dr->wIndex),
1187 __le16_to_cpup(&dr->wLength));
1188 u = sizeof(struct usb_ctrlrequest);
1191 case USBDEVFS_URB_TYPE_BULK:
1192 switch (usb_endpoint_type(&ep->desc)) {
1193 case USB_ENDPOINT_XFER_CONTROL:
1194 case USB_ENDPOINT_XFER_ISOC:
1196 case USB_ENDPOINT_XFER_INT:
1197 /* allow single-shot interrupt transfers */
1198 uurb->type = USBDEVFS_URB_TYPE_INTERRUPT;
1201 uurb->number_of_packets = 0;
1204 case USBDEVFS_URB_TYPE_INTERRUPT:
1205 if (!usb_endpoint_xfer_int(&ep->desc))
1208 uurb->number_of_packets = 0;
1211 case USBDEVFS_URB_TYPE_ISO:
1212 /* arbitrary limit */
1213 if (uurb->number_of_packets < 1 ||
1214 uurb->number_of_packets > 128)
1216 if (!usb_endpoint_xfer_isoc(&ep->desc))
1218 isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) *
1219 uurb->number_of_packets;
1220 if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL)))
1222 if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) {
1226 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
1228 * sufficient for USB 2.0 high-bandwidth iso */
1229 if (isopkt[u].length > 8192) {
1233 totlen += isopkt[u].length;
1235 u *= sizeof(struct usb_iso_packet_descriptor);
1236 uurb->buffer_length = totlen;
1243 if (uurb->buffer_length >= USBFS_XFER_MAX) {
1247 if (uurb->buffer_length > 0 &&
1248 !access_ok(is_in ? VERIFY_WRITE : VERIFY_READ,
1249 uurb->buffer, uurb->buffer_length)) {
1253 as = alloc_async(uurb->number_of_packets);
1258 u += sizeof(struct async) + sizeof(struct urb) + uurb->buffer_length;
1259 ret = usbfs_increase_memory_usage(u);
1264 if (uurb->buffer_length > 0) {
1265 as->urb->transfer_buffer = kmalloc(uurb->buffer_length,
1267 if (!as->urb->transfer_buffer) {
1271 /* Isochronous input data may end up being discontiguous
1272 * if some of the packets are short. Clear the buffer so
1273 * that the gaps don't leak kernel data to userspace.
1275 if (is_in && uurb->type == USBDEVFS_URB_TYPE_ISO)
1276 memset(as->urb->transfer_buffer, 0,
1277 uurb->buffer_length);
1279 as->urb->dev = ps->dev;
1280 as->urb->pipe = (uurb->type << 30) |
1281 __create_pipe(ps->dev, uurb->endpoint & 0xf) |
1282 (uurb->endpoint & USB_DIR_IN);
1284 /* This tedious sequence is necessary because the URB_* flags
1285 * are internal to the kernel and subject to change, whereas
1286 * the USBDEVFS_URB_* flags are a user API and must not be changed.
1288 u = (is_in ? URB_DIR_IN : URB_DIR_OUT);
1289 if (uurb->flags & USBDEVFS_URB_ISO_ASAP)
1291 if (uurb->flags & USBDEVFS_URB_SHORT_NOT_OK)
1292 u |= URB_SHORT_NOT_OK;
1293 if (uurb->flags & USBDEVFS_URB_NO_FSBR)
1295 if (uurb->flags & USBDEVFS_URB_ZERO_PACKET)
1296 u |= URB_ZERO_PACKET;
1297 if (uurb->flags & USBDEVFS_URB_NO_INTERRUPT)
1298 u |= URB_NO_INTERRUPT;
1299 as->urb->transfer_flags = u;
1301 as->urb->transfer_buffer_length = uurb->buffer_length;
1302 as->urb->setup_packet = (unsigned char *)dr;
1304 as->urb->start_frame = uurb->start_frame;
1305 as->urb->number_of_packets = uurb->number_of_packets;
1306 if (uurb->type == USBDEVFS_URB_TYPE_ISO ||
1307 ps->dev->speed == USB_SPEED_HIGH)
1308 as->urb->interval = 1 << min(15, ep->desc.bInterval - 1);
1310 as->urb->interval = ep->desc.bInterval;
1311 as->urb->context = as;
1312 as->urb->complete = async_completed;
1313 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
1314 as->urb->iso_frame_desc[u].offset = totlen;
1315 as->urb->iso_frame_desc[u].length = isopkt[u].length;
1316 totlen += isopkt[u].length;
1322 if (is_in && uurb->buffer_length > 0)
1323 as->userbuffer = uurb->buffer;
1325 as->userbuffer = NULL;
1326 as->signr = uurb->signr;
1328 as->pid = get_pid(task_pid(current));
1329 as->cred = get_current_cred();
1330 security_task_getsecid(current, &as->secid);
1331 if (!is_in && uurb->buffer_length > 0) {
1332 if (copy_from_user(as->urb->transfer_buffer, uurb->buffer,
1333 uurb->buffer_length)) {
1338 snoop_urb(ps->dev, as->userurb, as->urb->pipe,
1339 as->urb->transfer_buffer_length, 0, SUBMIT,
1340 is_in ? NULL : as->urb->transfer_buffer,
1341 uurb->buffer_length);
1342 async_newpending(as);
1344 if (usb_endpoint_xfer_bulk(&ep->desc)) {
1345 spin_lock_irq(&ps->lock);
1347 /* Not exactly the endpoint address; the direction bit is
1348 * shifted to the 0x10 position so that the value will be
1351 as->bulk_addr = usb_endpoint_num(&ep->desc) |
1352 ((ep->desc.bEndpointAddress & USB_ENDPOINT_DIR_MASK)
1355 /* If this bulk URB is the start of a new transfer, re-enable
1356 * the endpoint. Otherwise mark it as a continuation URB.
1358 if (uurb->flags & USBDEVFS_URB_BULK_CONTINUATION)
1359 as->bulk_status = AS_CONTINUATION;
1361 ps->disabled_bulk_eps &= ~(1 << as->bulk_addr);
1363 /* Don't accept continuation URBs if the endpoint is
1364 * disabled because of an earlier error.
1366 if (ps->disabled_bulk_eps & (1 << as->bulk_addr))
1369 ret = usb_submit_urb(as->urb, GFP_ATOMIC);
1370 spin_unlock_irq(&ps->lock);
1372 ret = usb_submit_urb(as->urb, GFP_KERNEL);
1376 dev_printk(KERN_DEBUG, &ps->dev->dev,
1377 "usbfs: usb_submit_urb returned %d\n", ret);
1378 snoop_urb(ps->dev, as->userurb, as->urb->pipe,
1379 0, ret, COMPLETE, NULL, 0);
1380 async_removepending(as);
1393 static int proc_submiturb(struct dev_state *ps, void __user *arg)
1395 struct usbdevfs_urb uurb;
1397 if (copy_from_user(&uurb, arg, sizeof(uurb)))
1400 return proc_do_submiturb(ps, &uurb,
1401 (((struct usbdevfs_urb __user *)arg)->iso_frame_desc),
1405 static int proc_unlinkurb(struct dev_state *ps, void __user *arg)
1409 unsigned long flags;
1411 spin_lock_irqsave(&ps->lock, flags);
1412 as = async_getpending(ps, arg);
1414 spin_unlock_irqrestore(&ps->lock, flags);
1420 spin_unlock_irqrestore(&ps->lock, flags);
1428 static int processcompl(struct async *as, void __user * __user *arg)
1430 struct urb *urb = as->urb;
1431 struct usbdevfs_urb __user *userurb = as->userurb;
1432 void __user *addr = as->userurb;
1435 if (as->userbuffer && urb->actual_length) {
1436 if (urb->number_of_packets > 0) /* Isochronous */
1437 i = urb->transfer_buffer_length;
1439 i = urb->actual_length;
1440 if (copy_to_user(as->userbuffer, urb->transfer_buffer, i))
1443 if (put_user(as->status, &userurb->status))
1445 if (put_user(urb->actual_length, &userurb->actual_length))
1447 if (put_user(urb->error_count, &userurb->error_count))
1450 if (usb_endpoint_xfer_isoc(&urb->ep->desc)) {
1451 for (i = 0; i < urb->number_of_packets; i++) {
1452 if (put_user(urb->iso_frame_desc[i].actual_length,
1453 &userurb->iso_frame_desc[i].actual_length))
1455 if (put_user(urb->iso_frame_desc[i].status,
1456 &userurb->iso_frame_desc[i].status))
1461 if (put_user(addr, (void __user * __user *)arg))
1469 static struct async *reap_as(struct dev_state *ps)
1471 DECLARE_WAITQUEUE(wait, current);
1472 struct async *as = NULL;
1473 struct usb_device *dev = ps->dev;
1475 add_wait_queue(&ps->wait, &wait);
1477 __set_current_state(TASK_INTERRUPTIBLE);
1478 as = async_getcompleted(ps);
1481 if (signal_pending(current))
1483 usb_unlock_device(dev);
1485 usb_lock_device(dev);
1487 remove_wait_queue(&ps->wait, &wait);
1488 set_current_state(TASK_RUNNING);
1492 static int proc_reapurb(struct dev_state *ps, void __user *arg)
1494 struct async *as = reap_as(ps);
1496 int retval = processcompl(as, (void __user * __user *)arg);
1500 if (signal_pending(current))
1505 static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg)
1510 as = async_getcompleted(ps);
1513 retval = processcompl(as, (void __user * __user *)arg);
1519 #ifdef CONFIG_COMPAT
1520 static int proc_control_compat(struct dev_state *ps,
1521 struct usbdevfs_ctrltransfer32 __user *p32)
1523 struct usbdevfs_ctrltransfer __user *p;
1525 p = compat_alloc_user_space(sizeof(*p));
1526 if (copy_in_user(p, p32, (sizeof(*p32) - sizeof(compat_caddr_t))) ||
1527 get_user(udata, &p32->data) ||
1528 put_user(compat_ptr(udata), &p->data))
1530 return proc_control(ps, p);
1533 static int proc_bulk_compat(struct dev_state *ps,
1534 struct usbdevfs_bulktransfer32 __user *p32)
1536 struct usbdevfs_bulktransfer __user *p;
1538 compat_caddr_t addr;
1540 p = compat_alloc_user_space(sizeof(*p));
1542 if (get_user(n, &p32->ep) || put_user(n, &p->ep) ||
1543 get_user(n, &p32->len) || put_user(n, &p->len) ||
1544 get_user(n, &p32->timeout) || put_user(n, &p->timeout) ||
1545 get_user(addr, &p32->data) || put_user(compat_ptr(addr), &p->data))
1548 return proc_bulk(ps, p);
1550 static int proc_disconnectsignal_compat(struct dev_state *ps, void __user *arg)
1552 struct usbdevfs_disconnectsignal32 ds;
1554 if (copy_from_user(&ds, arg, sizeof(ds)))
1556 ps->discsignr = ds.signr;
1557 ps->disccontext = compat_ptr(ds.context);
1561 static int get_urb32(struct usbdevfs_urb *kurb,
1562 struct usbdevfs_urb32 __user *uurb)
1565 if (!access_ok(VERIFY_READ, uurb, sizeof(*uurb)) ||
1566 __get_user(kurb->type, &uurb->type) ||
1567 __get_user(kurb->endpoint, &uurb->endpoint) ||
1568 __get_user(kurb->status, &uurb->status) ||
1569 __get_user(kurb->flags, &uurb->flags) ||
1570 __get_user(kurb->buffer_length, &uurb->buffer_length) ||
1571 __get_user(kurb->actual_length, &uurb->actual_length) ||
1572 __get_user(kurb->start_frame, &uurb->start_frame) ||
1573 __get_user(kurb->number_of_packets, &uurb->number_of_packets) ||
1574 __get_user(kurb->error_count, &uurb->error_count) ||
1575 __get_user(kurb->signr, &uurb->signr))
1578 if (__get_user(uptr, &uurb->buffer))
1580 kurb->buffer = compat_ptr(uptr);
1581 if (__get_user(uptr, &uurb->usercontext))
1583 kurb->usercontext = compat_ptr(uptr);
1588 static int proc_submiturb_compat(struct dev_state *ps, void __user *arg)
1590 struct usbdevfs_urb uurb;
1592 if (get_urb32(&uurb, (struct usbdevfs_urb32 __user *)arg))
1595 return proc_do_submiturb(ps, &uurb,
1596 ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc,
1600 static int processcompl_compat(struct async *as, void __user * __user *arg)
1602 struct urb *urb = as->urb;
1603 struct usbdevfs_urb32 __user *userurb = as->userurb;
1604 void __user *addr = as->userurb;
1607 if (as->userbuffer && urb->actual_length)
1608 if (copy_to_user(as->userbuffer, urb->transfer_buffer,
1609 urb->actual_length))
1611 if (put_user(as->status, &userurb->status))
1613 if (put_user(urb->actual_length, &userurb->actual_length))
1615 if (put_user(urb->error_count, &userurb->error_count))
1618 if (usb_endpoint_xfer_isoc(&urb->ep->desc)) {
1619 for (i = 0; i < urb->number_of_packets; i++) {
1620 if (put_user(urb->iso_frame_desc[i].actual_length,
1621 &userurb->iso_frame_desc[i].actual_length))
1623 if (put_user(urb->iso_frame_desc[i].status,
1624 &userurb->iso_frame_desc[i].status))
1629 if (put_user(ptr_to_compat(addr), (u32 __user *)arg))
1634 static int proc_reapurb_compat(struct dev_state *ps, void __user *arg)
1636 struct async *as = reap_as(ps);
1638 int retval = processcompl_compat(as, (void __user * __user *)arg);
1642 if (signal_pending(current))
1647 static int proc_reapurbnonblock_compat(struct dev_state *ps, void __user *arg)
1653 as = async_getcompleted(ps);
1655 retval = processcompl_compat(as, (void __user * __user *)arg);
1664 static int proc_disconnectsignal(struct dev_state *ps, void __user *arg)
1666 struct usbdevfs_disconnectsignal ds;
1668 if (copy_from_user(&ds, arg, sizeof(ds)))
1670 ps->discsignr = ds.signr;
1671 ps->disccontext = ds.context;
1675 static int proc_claiminterface(struct dev_state *ps, void __user *arg)
1679 if (get_user(ifnum, (unsigned int __user *)arg))
1681 return claimintf(ps, ifnum);
1684 static int proc_releaseinterface(struct dev_state *ps, void __user *arg)
1689 if (get_user(ifnum, (unsigned int __user *)arg))
1691 if ((ret = releaseintf(ps, ifnum)) < 0)
1693 destroy_async_on_interface (ps, ifnum);
1697 static int proc_ioctl(struct dev_state *ps, struct usbdevfs_ioctl *ctl)
1702 struct usb_interface *intf = NULL;
1703 struct usb_driver *driver = NULL;
1706 if ((size = _IOC_SIZE(ctl->ioctl_code)) > 0) {
1707 if ((buf = kmalloc(size, GFP_KERNEL)) == NULL)
1709 if ((_IOC_DIR(ctl->ioctl_code) & _IOC_WRITE)) {
1710 if (copy_from_user(buf, ctl->data, size)) {
1715 memset(buf, 0, size);
1719 if (!connected(ps)) {
1724 if (ps->dev->state != USB_STATE_CONFIGURED)
1725 retval = -EHOSTUNREACH;
1726 else if (!(intf = usb_ifnum_to_if(ps->dev, ctl->ifno)))
1728 else switch (ctl->ioctl_code) {
1730 /* disconnect kernel driver from interface */
1731 case USBDEVFS_DISCONNECT:
1732 if (intf->dev.driver) {
1733 driver = to_usb_driver(intf->dev.driver);
1734 dev_dbg(&intf->dev, "disconnect by usbfs\n");
1735 usb_driver_release_interface(driver, intf);
1740 /* let kernel drivers try to (re)bind to the interface */
1741 case USBDEVFS_CONNECT:
1742 if (!intf->dev.driver)
1743 retval = device_attach(&intf->dev);
1748 /* talk directly to the interface's driver */
1750 if (intf->dev.driver)
1751 driver = to_usb_driver(intf->dev.driver);
1752 if (driver == NULL || driver->unlocked_ioctl == NULL) {
1755 retval = driver->unlocked_ioctl(intf, ctl->ioctl_code, buf);
1756 if (retval == -ENOIOCTLCMD)
1761 /* cleanup and return */
1763 && (_IOC_DIR(ctl->ioctl_code) & _IOC_READ) != 0
1765 && copy_to_user(ctl->data, buf, size) != 0)
1772 static int proc_ioctl_default(struct dev_state *ps, void __user *arg)
1774 struct usbdevfs_ioctl ctrl;
1776 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
1778 return proc_ioctl(ps, &ctrl);
1781 #ifdef CONFIG_COMPAT
1782 static int proc_ioctl_compat(struct dev_state *ps, compat_uptr_t arg)
1784 struct usbdevfs_ioctl32 __user *uioc;
1785 struct usbdevfs_ioctl ctrl;
1788 uioc = compat_ptr((long)arg);
1789 if (!access_ok(VERIFY_READ, uioc, sizeof(*uioc)) ||
1790 __get_user(ctrl.ifno, &uioc->ifno) ||
1791 __get_user(ctrl.ioctl_code, &uioc->ioctl_code) ||
1792 __get_user(udata, &uioc->data))
1794 ctrl.data = compat_ptr(udata);
1796 return proc_ioctl(ps, &ctrl);
1800 static int proc_claim_port(struct dev_state *ps, void __user *arg)
1805 if (get_user(portnum, (unsigned __user *) arg))
1807 rc = usb_hub_claim_port(ps->dev, portnum, ps);
1809 snoop(&ps->dev->dev, "port %d claimed by process %d: %s\n",
1810 portnum, task_pid_nr(current), current->comm);
1814 static int proc_release_port(struct dev_state *ps, void __user *arg)
1818 if (get_user(portnum, (unsigned __user *) arg))
1820 return usb_hub_release_port(ps->dev, portnum, ps);
1824 * NOTE: All requests here that have interface numbers as parameters
1825 * are assuming that somehow the configuration has been prevented from
1826 * changing. But there's no mechanism to ensure that...
1828 static long usbdev_do_ioctl(struct file *file, unsigned int cmd,
1831 struct dev_state *ps = file->private_data;
1832 struct inode *inode = file->f_path.dentry->d_inode;
1833 struct usb_device *dev = ps->dev;
1836 if (!(file->f_mode & FMODE_WRITE))
1839 usb_lock_device(dev);
1840 if (!connected(ps)) {
1841 usb_unlock_device(dev);
1846 case USBDEVFS_CONTROL:
1847 snoop(&dev->dev, "%s: CONTROL\n", __func__);
1848 ret = proc_control(ps, p);
1850 inode->i_mtime = CURRENT_TIME;
1854 snoop(&dev->dev, "%s: BULK\n", __func__);
1855 ret = proc_bulk(ps, p);
1857 inode->i_mtime = CURRENT_TIME;
1860 case USBDEVFS_RESETEP:
1861 snoop(&dev->dev, "%s: RESETEP\n", __func__);
1862 ret = proc_resetep(ps, p);
1864 inode->i_mtime = CURRENT_TIME;
1867 case USBDEVFS_RESET:
1868 snoop(&dev->dev, "%s: RESET\n", __func__);
1869 ret = proc_resetdevice(ps);
1872 case USBDEVFS_CLEAR_HALT:
1873 snoop(&dev->dev, "%s: CLEAR_HALT\n", __func__);
1874 ret = proc_clearhalt(ps, p);
1876 inode->i_mtime = CURRENT_TIME;
1879 case USBDEVFS_GETDRIVER:
1880 snoop(&dev->dev, "%s: GETDRIVER\n", __func__);
1881 ret = proc_getdriver(ps, p);
1884 case USBDEVFS_CONNECTINFO:
1885 snoop(&dev->dev, "%s: CONNECTINFO\n", __func__);
1886 ret = proc_connectinfo(ps, p);
1889 case USBDEVFS_SETINTERFACE:
1890 snoop(&dev->dev, "%s: SETINTERFACE\n", __func__);
1891 ret = proc_setintf(ps, p);
1894 case USBDEVFS_SETCONFIGURATION:
1895 snoop(&dev->dev, "%s: SETCONFIGURATION\n", __func__);
1896 ret = proc_setconfig(ps, p);
1899 case USBDEVFS_SUBMITURB:
1900 snoop(&dev->dev, "%s: SUBMITURB\n", __func__);
1901 ret = proc_submiturb(ps, p);
1903 inode->i_mtime = CURRENT_TIME;
1906 #ifdef CONFIG_COMPAT
1907 case USBDEVFS_CONTROL32:
1908 snoop(&dev->dev, "%s: CONTROL32\n", __func__);
1909 ret = proc_control_compat(ps, p);
1911 inode->i_mtime = CURRENT_TIME;
1914 case USBDEVFS_BULK32:
1915 snoop(&dev->dev, "%s: BULK32\n", __func__);
1916 ret = proc_bulk_compat(ps, p);
1918 inode->i_mtime = CURRENT_TIME;
1921 case USBDEVFS_DISCSIGNAL32:
1922 snoop(&dev->dev, "%s: DISCSIGNAL32\n", __func__);
1923 ret = proc_disconnectsignal_compat(ps, p);
1926 case USBDEVFS_SUBMITURB32:
1927 snoop(&dev->dev, "%s: SUBMITURB32\n", __func__);
1928 ret = proc_submiturb_compat(ps, p);
1930 inode->i_mtime = CURRENT_TIME;
1933 case USBDEVFS_REAPURB32:
1934 snoop(&dev->dev, "%s: REAPURB32\n", __func__);
1935 ret = proc_reapurb_compat(ps, p);
1938 case USBDEVFS_REAPURBNDELAY32:
1939 snoop(&dev->dev, "%s: REAPURBNDELAY32\n", __func__);
1940 ret = proc_reapurbnonblock_compat(ps, p);
1943 case USBDEVFS_IOCTL32:
1944 snoop(&dev->dev, "%s: IOCTL32\n", __func__);
1945 ret = proc_ioctl_compat(ps, ptr_to_compat(p));
1949 case USBDEVFS_DISCARDURB:
1950 snoop(&dev->dev, "%s: DISCARDURB\n", __func__);
1951 ret = proc_unlinkurb(ps, p);
1954 case USBDEVFS_REAPURB:
1955 snoop(&dev->dev, "%s: REAPURB\n", __func__);
1956 ret = proc_reapurb(ps, p);
1959 case USBDEVFS_REAPURBNDELAY:
1960 snoop(&dev->dev, "%s: REAPURBNDELAY\n", __func__);
1961 ret = proc_reapurbnonblock(ps, p);
1964 case USBDEVFS_DISCSIGNAL:
1965 snoop(&dev->dev, "%s: DISCSIGNAL\n", __func__);
1966 ret = proc_disconnectsignal(ps, p);
1969 case USBDEVFS_CLAIMINTERFACE:
1970 snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __func__);
1971 ret = proc_claiminterface(ps, p);
1974 case USBDEVFS_RELEASEINTERFACE:
1975 snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __func__);
1976 ret = proc_releaseinterface(ps, p);
1979 case USBDEVFS_IOCTL:
1980 snoop(&dev->dev, "%s: IOCTL\n", __func__);
1981 ret = proc_ioctl_default(ps, p);
1984 case USBDEVFS_CLAIM_PORT:
1985 snoop(&dev->dev, "%s: CLAIM_PORT\n", __func__);
1986 ret = proc_claim_port(ps, p);
1989 case USBDEVFS_RELEASE_PORT:
1990 snoop(&dev->dev, "%s: RELEASE_PORT\n", __func__);
1991 ret = proc_release_port(ps, p);
1994 usb_unlock_device(dev);
1996 inode->i_atime = CURRENT_TIME;
2000 static long usbdev_ioctl(struct file *file, unsigned int cmd,
2005 ret = usbdev_do_ioctl(file, cmd, (void __user *)arg);
2010 #ifdef CONFIG_COMPAT
2011 static long usbdev_compat_ioctl(struct file *file, unsigned int cmd,
2016 ret = usbdev_do_ioctl(file, cmd, compat_ptr(arg));
2022 /* No kernel lock - fine */
2023 static unsigned int usbdev_poll(struct file *file,
2024 struct poll_table_struct *wait)
2026 struct dev_state *ps = file->private_data;
2027 unsigned int mask = 0;
2029 poll_wait(file, &ps->wait, wait);
2030 if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed))
2031 mask |= POLLOUT | POLLWRNORM;
2033 mask |= POLLERR | POLLHUP;
2037 const struct file_operations usbdev_file_operations = {
2038 .owner = THIS_MODULE,
2039 .llseek = usbdev_lseek,
2040 .read = usbdev_read,
2041 .poll = usbdev_poll,
2042 .unlocked_ioctl = usbdev_ioctl,
2043 #ifdef CONFIG_COMPAT
2044 .compat_ioctl = usbdev_compat_ioctl,
2046 .open = usbdev_open,
2047 .release = usbdev_release,
2050 static void usbdev_remove(struct usb_device *udev)
2052 struct dev_state *ps;
2053 struct siginfo sinfo;
2055 while (!list_empty(&udev->filelist)) {
2056 ps = list_entry(udev->filelist.next, struct dev_state, list);
2057 destroy_all_async(ps);
2058 wake_up_all(&ps->wait);
2059 list_del_init(&ps->list);
2060 if (ps->discsignr) {
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 static int usbdev_notify(struct notifier_block *self,
2072 unsigned long action, void *dev)
2075 case USB_DEVICE_ADD:
2077 case USB_DEVICE_REMOVE:
2084 static struct notifier_block usbdev_nb = {
2085 .notifier_call = usbdev_notify,
2088 static struct cdev usb_device_cdev;
2090 int __init usb_devio_init(void)
2094 retval = register_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX,
2097 printk(KERN_ERR "Unable to register minors for usb_device\n");
2100 cdev_init(&usb_device_cdev, &usbdev_file_operations);
2101 retval = cdev_add(&usb_device_cdev, USB_DEVICE_DEV, USB_DEVICE_MAX);
2103 printk(KERN_ERR "Unable to get usb_device major %d\n",
2107 usb_register_notify(&usbdev_nb);
2112 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
2116 void usb_devio_cleanup(void)
2118 usb_unregister_notify(&usbdev_nb);
2119 cdev_del(&usb_device_cdev);
2120 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);