SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/usb/core/devio.c

   1 /*****************************************************************************/
   2
   3 /*
   4  *      devio.c  --  User space communication with USB devices.
   5  *
   6  *      Copyright (C) 1999-2000  Thomas Sailer (sailer@ife.ee.ethz.ch)
   7  *
   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.
  12  *
  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.
  17  *
  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.
  21  *
  22  *  $Id: devio.c,v 1.7 2000/02/01 17:28:48 fliegl Exp $
  23  *
  24  *  This file implements the usbfs/x/y files, where
  25  *  x is the bus number and y the device number.
  26  *
  27  *  It allows user space programs/"drivers" to communicate directly
  28  *  with USB devices without intervening kernel driver.
  29  *
  30  *  Revision history
  31  *    22.12.1999   0.1   Initial release (split from proc_usb.c)
  32  *    04.01.2000   0.2   Turned into its own filesystem
  33  *    30.09.2005   0.3   Fix user-triggerable oops in async URB delivery
  34  *                       (CAN-2005-3055)
  35  */
  36
  37 /*****************************************************************************/
  38
  39 #include <linux/fs.h>
  40 #include <linux/mm.h>
  41 #include <linux/slab.h>
  42 #include <linux/smp_lock.h>
  43 #include <linux/signal.h>
  44 #include <linux/poll.h>
  45 #include <linux/module.h>
  46 #include <linux/usb.h>
  47 #include <linux/usbdevice_fs.h>
  48 #include <linux/cdev.h>
  49 #include <linux/notifier.h>
  50 #include <asm/uaccess.h>
  51 #include <asm/byteorder.h>
  52 #include <linux/moduleparam.h>
  53
  54 #include "hcd.h"        /* for usbcore internals */
  55 #include "usb.h"
  56
  57 #define USB_MAXBUS                      64
  58 #define USB_DEVICE_MAX                  USB_MAXBUS * 128
  59 static struct class *usb_device_class;
  60
  61 struct async {
  62         struct list_head asynclist;
  63         struct dev_state *ps;
  64         pid_t pid;
  65         uid_t uid, euid;
  66         unsigned int signr;
  67         unsigned int ifnum;
  68         void __user *userbuffer;
  69         void __user *userurb;
  70         struct urb *urb;
  71 };
  72
  73 static int usbfs_snoop = 0;
  74 module_param (usbfs_snoop, bool, S_IRUGO | S_IWUSR);
  75 MODULE_PARM_DESC (usbfs_snoop, "true to log all usbfs traffic");
  76
  77 #define snoop(dev, format, arg...)                              \
  78         do {                                                    \
  79                 if (usbfs_snoop)                                \
  80                         dev_info( dev , format , ## arg);       \
  81         } while (0)
  82
  83 #define USB_DEVICE_DEV          MKDEV(USB_DEVICE_MAJOR, 0)
  84
  85
  86 #define MAX_USBFS_BUFFER_SIZE   16384
  87
  88 static inline int connected (struct usb_device *dev)
  89 {
  90         return dev->state != USB_STATE_NOTATTACHED;
  91 }
  92
  93 static loff_t usbdev_lseek(struct file *file, loff_t offset, int orig)
  94 {
  95         loff_t ret;
  96
  97         lock_kernel();
  98
  99         switch (orig) {
 100         case 0:
 101                 file->f_pos = offset;
 102                 ret = file->f_pos;
 103                 break;
 104         case 1:
 105                 file->f_pos += offset;
 106                 ret = file->f_pos;
 107                 break;
 108         case 2:
 109         default:
 110                 ret = -EINVAL;
 111         }
 112
 113         unlock_kernel();
 114         return ret;
 115 }
 116
 117 static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos)
 118 {
 119         struct dev_state *ps = (struct dev_state *)file->private_data;
 120         struct usb_device *dev = ps->dev;
 121         ssize_t ret = 0;
 122         unsigned len;
 123         loff_t pos;
 124         int i;
 125
 126         pos = *ppos;
 127         usb_lock_device(dev);
 128         if (!connected(dev)) {
 129                 ret = -ENODEV;
 130                 goto err;
 131         } else if (pos < 0) {
 132                 ret = -EINVAL;
 133                 goto err;
 134         }
 135
 136         if (pos < sizeof(struct usb_device_descriptor)) {
 137                 struct usb_device_descriptor temp_desc ; /* 18 bytes - fits on the stack */
 138
 139                 memcpy(&temp_desc, &dev->descriptor, sizeof(dev->descriptor));
 140                 le16_to_cpus(&temp_desc.bcdUSB);
 141                 le16_to_cpus(&temp_desc.idVendor);
 142                 le16_to_cpus(&temp_desc.idProduct);
 143                 le16_to_cpus(&temp_desc.bcdDevice);
 144
 145                 len = sizeof(struct usb_device_descriptor) - pos;
 146                 if (len > nbytes)
 147                         len = nbytes;
 148                 if (copy_to_user(buf, ((char *)&temp_desc) + pos, len)) {
 149                         ret = -EFAULT;
 150                         goto err;
 151                 }
 152
 153                 *ppos += len;
 154                 buf += len;
 155                 nbytes -= len;
 156                 ret += len;
 157         }
 158
 159         pos = sizeof(struct usb_device_descriptor);
 160         for (i = 0; nbytes && i < dev->descriptor.bNumConfigurations; i++) {
 161                 struct usb_config_descriptor *config =
 162                         (struct usb_config_descriptor *)dev->rawdescriptors[i];
 163                 unsigned int length = le16_to_cpu(config->wTotalLength);
 164
 165                 if (*ppos < pos + length) {
 166
 167                         /* The descriptor may claim to be longer than it
 168                          * really is.  Here is the actual allocated length. */
 169                         unsigned alloclen =
 170                                 le16_to_cpu(dev->config[i].desc.wTotalLength);
 171
 172                         len = length - (*ppos - pos);
 173                         if (len > nbytes)
 174                                 len = nbytes;
 175
 176                         /* Simply don't write (skip over) unallocated parts */
 177                         if (alloclen > (*ppos - pos)) {
 178                                 alloclen -= (*ppos - pos);
 179                                 if (copy_to_user(buf,
 180                                     dev->rawdescriptors[i] + (*ppos - pos),
 181                                     min(len, alloclen))) {
 182                                         ret = -EFAULT;
 183                                         goto err;
 184                                 }
 185                         }
 186
 187                         *ppos += len;
 188                         buf += len;
 189                         nbytes -= len;
 190                         ret += len;
 191                 }
 192
 193                 pos += length;
 194         }
 195
 196 err:
 197         usb_unlock_device(dev);
 198         return ret;
 199 }
 200
 201 /*
 202  * async list handling
 203  */
 204
 205 static struct async *alloc_async(unsigned int numisoframes)
 206 {
 207         unsigned int assize = sizeof(struct async) + numisoframes * sizeof(struct usb_iso_packet_descriptor);
 208         struct async *as = kzalloc(assize, GFP_KERNEL);
 209
 210         if (!as)
 211                 return NULL;
 212         as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL);
 213         if (!as->urb) {
 214                 kfree(as);
 215                 return NULL;
 216         }
 217         return as;
 218 }
 219
 220 static void free_async(struct async *as)
 221 {
 222         kfree(as->urb->transfer_buffer);
 223         kfree(as->urb->setup_packet);
 224         usb_free_urb(as->urb);
 225         kfree(as);
 226 }
 227
 228 static inline void async_newpending(struct async *as)
 229 {
 230         struct dev_state *ps = as->ps;
 231         unsigned long flags;
 232
 233         spin_lock_irqsave(&ps->lock, flags);
 234         list_add_tail(&as->asynclist, &ps->async_pending);
 235         spin_unlock_irqrestore(&ps->lock, flags);
 236 }
 237
 238 static inline void async_removepending(struct async *as)
 239 {
 240         struct dev_state *ps = as->ps;
 241         unsigned long flags;
 242
 243         spin_lock_irqsave(&ps->lock, flags);
 244         list_del_init(&as->asynclist);
 245         spin_unlock_irqrestore(&ps->lock, flags);
 246 }
 247
 248 static inline struct async *async_getcompleted(struct dev_state *ps)
 249 {
 250         unsigned long flags;
 251         struct async *as = NULL;
 252
 253         spin_lock_irqsave(&ps->lock, flags);
 254         if (!list_empty(&ps->async_completed)) {
 255                 as = list_entry(ps->async_completed.next, struct async, asynclist);
 256                 list_del_init(&as->asynclist);
 257         }
 258         spin_unlock_irqrestore(&ps->lock, flags);
 259         return as;
 260 }
 261
 262 static inline struct async *async_getpending(struct dev_state *ps, void __user *userurb)
 263 {
 264         unsigned long flags;
 265         struct async *as;
 266
 267         spin_lock_irqsave(&ps->lock, flags);
 268         list_for_each_entry(as, &ps->async_pending, asynclist)
 269                 if (as->userurb == userurb) {
 270                         list_del_init(&as->asynclist);
 271                         spin_unlock_irqrestore(&ps->lock, flags);
 272                         return as;
 273                 }
 274         spin_unlock_irqrestore(&ps->lock, flags);
 275         return NULL;
 276 }
 277
 278 static void snoop_urb(struct urb *urb, void __user *userurb)
 279 {
 280         int j;
 281         unsigned char *data = urb->transfer_buffer;
 282
 283         if (!usbfs_snoop)
 284                 return;
 285
 286         if (urb->pipe & USB_DIR_IN)
 287                 dev_info(&urb->dev->dev, "direction=IN\n");
 288         else
 289                 dev_info(&urb->dev->dev, "direction=OUT\n");
 290         dev_info(&urb->dev->dev, "userurb=%p\n", userurb);
 291         dev_info(&urb->dev->dev, "transfer_buffer_length=%d\n",
 292                  urb->transfer_buffer_length);
 293         dev_info(&urb->dev->dev, "actual_length=%d\n", urb->actual_length);
 294         dev_info(&urb->dev->dev, "data: ");
 295         for (j = 0; j < urb->transfer_buffer_length; ++j)
 296                 printk ("%02x ", data[j]);
 297         printk("\n");
 298 }
 299
 300 static void async_completed(struct urb *urb, struct pt_regs *regs)
 301 {
 302         struct async *as = (struct async *)urb->context;
 303         struct dev_state *ps = as->ps;
 304         struct siginfo sinfo;
 305
 306         spin_lock(&ps->lock);
 307         list_move_tail(&as->asynclist, &ps->async_completed);
 308         spin_unlock(&ps->lock);
 309         if (as->signr) {
 310                 sinfo.si_signo = as->signr;
 311                 sinfo.si_errno = as->urb->status;
 312                 sinfo.si_code = SI_ASYNCIO;
 313                 sinfo.si_addr = as->userurb;
 314                 kill_proc_info_as_uid(as->signr, &sinfo, as->pid, as->uid,
 315                                       as->euid);
 316         }
 317         snoop(&urb->dev->dev, "urb complete\n");
 318         snoop_urb(urb, as->userurb);
 319         wake_up(&ps->wait);
 320 }
 321
 322 static void destroy_async (struct dev_state *ps, struct list_head *list)
 323 {
 324         struct async *as;
 325         unsigned long flags;
 326
 327         spin_lock_irqsave(&ps->lock, flags);
 328         while (!list_empty(list)) {
 329                 as = list_entry(list->next, struct async, asynclist);
 330                 list_del_init(&as->asynclist);
 331
 332                 /* drop the spinlock so the completion handler can run */
 333                 spin_unlock_irqrestore(&ps->lock, flags);
 334                 usb_kill_urb(as->urb);
 335                 spin_lock_irqsave(&ps->lock, flags);
 336         }
 337         spin_unlock_irqrestore(&ps->lock, flags);
 338         as = async_getcompleted(ps);
 339         while (as) {
 340                 free_async(as);
 341                 as = async_getcompleted(ps);
 342         }
 343 }
 344
 345 static void destroy_async_on_interface (struct dev_state *ps, unsigned int ifnum)
 346 {
 347         struct list_head *p, *q, hitlist;
 348         unsigned long flags;
 349
 350         INIT_LIST_HEAD(&hitlist);
 351         spin_lock_irqsave(&ps->lock, flags);
 352         list_for_each_safe(p, q, &ps->async_pending)
 353                 if (ifnum == list_entry(p, struct async, asynclist)->ifnum)
 354                         list_move_tail(p, &hitlist);
 355         spin_unlock_irqrestore(&ps->lock, flags);
 356         destroy_async(ps, &hitlist);
 357 }
 358
 359 static inline void destroy_all_async(struct dev_state *ps)
 360 {
 361                 destroy_async(ps, &ps->async_pending);
 362 }
 363
 364 /*
 365  * interface claims are made only at the request of user level code,
 366  * which can also release them (explicitly or by closing files).
 367  * they're also undone when devices disconnect.
 368  */
 369
 370 static int driver_probe (struct usb_interface *intf,
 371                          const struct usb_device_id *id)
 372 {
 373         return -ENODEV;
 374 }
 375
 376 static void driver_disconnect(struct usb_interface *intf)
 377 {
 378         struct dev_state *ps = usb_get_intfdata (intf);
 379         unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber;
 380
 381         if (!ps)
 382                 return;
 383
 384         /* NOTE:  this relies on usbcore having canceled and completed
 385          * all pending I/O requests; 2.6 does that.
 386          */
 387
 388         if (likely(ifnum < 8*sizeof(ps->ifclaimed)))
 389                 clear_bit(ifnum, &ps->ifclaimed);
 390         else
 391                 warn("interface number %u out of range", ifnum);
 392
 393         usb_set_intfdata (intf, NULL);
 394
 395         /* force async requests to complete */
 396         destroy_async_on_interface(ps, ifnum);
 397 }
 398
 399 struct usb_driver usbfs_driver = {
 400         .name =         "usbfs",
 401         .probe =        driver_probe,
 402         .disconnect =   driver_disconnect,
 403 };
 404
 405 static int claimintf(struct dev_state *ps, unsigned int ifnum)
 406 {
 407         struct usb_device *dev = ps->dev;
 408         struct usb_interface *intf;
 409         int err;
 410
 411         if (ifnum >= 8*sizeof(ps->ifclaimed))
 412                 return -EINVAL;
 413         /* already claimed */
 414         if (test_bit(ifnum, &ps->ifclaimed))
 415                 return 0;
 416
 417         /* lock against other changes to driver bindings */
 418         down_write(&usb_bus_type.subsys.rwsem);
 419         intf = usb_ifnum_to_if(dev, ifnum);
 420         if (!intf)
 421                 err = -ENOENT;
 422         else
 423                 err = usb_driver_claim_interface(&usbfs_driver, intf, ps);
 424         up_write(&usb_bus_type.subsys.rwsem);
 425         if (err == 0)
 426                 set_bit(ifnum, &ps->ifclaimed);
 427         return err;
 428 }
 429
 430 static int releaseintf(struct dev_state *ps, unsigned int ifnum)
 431 {
 432         struct usb_device *dev;
 433         struct usb_interface *intf;
 434         int err;
 435
 436         err = -EINVAL;
 437         if (ifnum >= 8*sizeof(ps->ifclaimed))
 438                 return err;
 439         dev = ps->dev;
 440         /* lock against other changes to driver bindings */
 441         down_write(&usb_bus_type.subsys.rwsem);
 442         intf = usb_ifnum_to_if(dev, ifnum);
 443         if (!intf)
 444                 err = -ENOENT;
 445         else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) {
 446                 usb_driver_release_interface(&usbfs_driver, intf);
 447                 err = 0;
 448         }
 449         up_write(&usb_bus_type.subsys.rwsem);
 450         return err;
 451 }
 452
 453 static int checkintf(struct dev_state *ps, unsigned int ifnum)
 454 {
 455         if (ps->dev->state != USB_STATE_CONFIGURED)
 456                 return -EHOSTUNREACH;
 457         if (ifnum >= 8*sizeof(ps->ifclaimed))
 458                 return -EINVAL;
 459         if (test_bit(ifnum, &ps->ifclaimed))
 460                 return 0;
 461         /* if not yet claimed, claim it for the driver */
 462         dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim interface %u before use\n",
 463                current->pid, current->comm, ifnum);
 464         return claimintf(ps, ifnum);
 465 }
 466
 467 static int findintfep(struct usb_device *dev, unsigned int ep)
 468 {
 469         unsigned int i, j, e;
 470         struct usb_interface *intf;
 471         struct usb_host_interface *alts;
 472         struct usb_endpoint_descriptor *endpt;
 473
 474         if (ep & ~(USB_DIR_IN|0xf))
 475                 return -EINVAL;
 476         if (!dev->actconfig)
 477                 return -ESRCH;
 478         for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) {
 479                 intf = dev->actconfig->interface[i];
 480                 for (j = 0; j < intf->num_altsetting; j++) {
 481                         alts = &intf->altsetting[j];
 482                         for (e = 0; e < alts->desc.bNumEndpoints; e++) {
 483                                 endpt = &alts->endpoint[e].desc;
 484                                 if (endpt->bEndpointAddress == ep)
 485                                         return alts->desc.bInterfaceNumber;
 486                         }
 487                 }
 488         }
 489         return -ENOENT;
 490 }
 491
 492 static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype, unsigned int index)
 493 {
 494         int ret = 0;
 495
 496         if (ps->dev->state != USB_STATE_CONFIGURED)
 497                 return -EHOSTUNREACH;
 498         if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype))
 499                 return 0;
 500
 501         index &= 0xff;
 502         switch (requesttype & USB_RECIP_MASK) {
 503         case USB_RECIP_ENDPOINT:
 504                 if ((ret = findintfep(ps->dev, index)) >= 0)
 505                         ret = checkintf(ps, ret);
 506                 break;
 507
 508         case USB_RECIP_INTERFACE:
 509                 ret = checkintf(ps, index);
 510                 break;
 511         }
 512         return ret;
 513 }
 514
 515 static struct usb_device *usbdev_lookup_minor(int minor)
 516 {
 517         struct class_device *class_dev;
 518         struct usb_device *dev = NULL;
 519
 520         down(&usb_device_class->sem);
 521         list_for_each_entry(class_dev, &usb_device_class->children, node) {
 522                 if (class_dev->devt == MKDEV(USB_DEVICE_MAJOR, minor)) {
 523                         dev = class_dev->class_data;
 524                         break;
 525                 }
 526         }
 527         up(&usb_device_class->sem);
 528
 529         return dev;
 530 };
 531
 532 /*
 533  * file operations
 534  */
 535 static int usbdev_open(struct inode *inode, struct file *file)
 536 {
 537         struct usb_device *dev = NULL;
 538         struct dev_state *ps;
 539         int ret;
 540
 541         /*
 542          * no locking necessary here, as chrdev_open has the kernel lock
 543          * (still acquire the kernel lock for safety)
 544          */
 545         ret = -ENOMEM;
 546         if (!(ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL)))
 547                 goto out_nolock;
 548
 549         lock_kernel();
 550         ret = -ENOENT;
 551         /* check if we are called from a real node or usbfs */
 552         if (imajor(inode) == USB_DEVICE_MAJOR)
 553                 dev = usbdev_lookup_minor(iminor(inode));
 554         if (!dev)
 555                 dev = inode->u.generic_ip;
 556         if (!dev) {
 557                 kfree(ps);
 558                 goto out;
 559         }
 560         usb_get_dev(dev);
 561         ret = 0;
 562         ps->dev = dev;
 563         ps->file = file;
 564         spin_lock_init(&ps->lock);
 565         INIT_LIST_HEAD(&ps->async_pending);
 566         INIT_LIST_HEAD(&ps->async_completed);
 567         init_waitqueue_head(&ps->wait);
 568         ps->discsignr = 0;
 569         ps->disc_pid = current->pid;
 570         ps->disc_uid = current->uid;
 571         ps->disc_euid = current->euid;
 572         ps->disccontext = NULL;
 573         ps->ifclaimed = 0;
 574         wmb();
 575         list_add_tail(&ps->list, &dev->filelist);
 576         file->private_data = ps;
 577  out:
 578         unlock_kernel();
 579  out_nolock:
 580         return ret;
 581 }
 582
 583 static int usbdev_release(struct inode *inode, struct file *file)
 584 {
 585         struct dev_state *ps = (struct dev_state *)file->private_data;
 586         struct usb_device *dev = ps->dev;
 587         unsigned int ifnum;
 588
 589         usb_lock_device(dev);
 590         list_del_init(&ps->list);
 591         for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed);
 592                         ifnum++) {
 593                 if (test_bit(ifnum, &ps->ifclaimed))
 594                         releaseintf(ps, ifnum);
 595         }
 596         destroy_all_async(ps);
 597         usb_unlock_device(dev);
 598         usb_put_dev(dev);
 599         ps->dev = NULL;
 600         kfree(ps);
 601         return 0;
 602 }
 603
 604 static int proc_control(struct dev_state *ps, void __user *arg)
 605 {
 606         struct usb_device *dev = ps->dev;
 607         struct usbdevfs_ctrltransfer ctrl;
 608         unsigned int tmo;
 609         unsigned char *tbuf;
 610         int i, j, ret;
 611
 612         if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
 613                 return -EFAULT;
 614         if ((ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.wIndex)))
 615                 return ret;
 616         if (ctrl.wLength > PAGE_SIZE)
 617                 return -EINVAL;
 618         if (!(tbuf = (unsigned char *)__get_free_page(GFP_KERNEL)))
 619                 return -ENOMEM;
 620         tmo = ctrl.timeout;
 621         if (ctrl.bRequestType & 0x80) {
 622                 if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data, ctrl.wLength)) {
 623                         free_page((unsigned long)tbuf);
 624                         return -EINVAL;
 625                 }
 626                 snoop(&dev->dev, "control read: bRequest=%02x "
 627                                 "bRrequestType=%02x wValue=%04x "
 628                                 "wIndex=%04x wLength=%04x\n",
 629                         ctrl.bRequest, ctrl.bRequestType, ctrl.wValue,
 630                                 ctrl.wIndex, ctrl.wLength);
 631
 632                 usb_unlock_device(dev);
 633                 i = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType,
 634                                        ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo);
 635                 usb_lock_device(dev);
 636                 if ((i > 0) && ctrl.wLength) {
 637                         if (usbfs_snoop) {
 638                                 dev_info(&dev->dev, "control read: data ");
 639                                 for (j = 0; j < i; ++j)
 640                                         printk("%02x ", (unsigned char)(tbuf)[j]);
 641                                 printk("\n");
 642                         }
 643                         if (copy_to_user(ctrl.data, tbuf, i)) {
 644                                 free_page((unsigned long)tbuf);
 645                                 return -EFAULT;
 646                         }
 647                 }
 648         } else {
 649                 if (ctrl.wLength) {
 650                         if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) {
 651                                 free_page((unsigned long)tbuf);
 652                                 return -EFAULT;
 653                         }
 654                 }
 655                 snoop(&dev->dev, "control write: bRequest=%02x "
 656                                 "bRrequestType=%02x wValue=%04x "
 657                                 "wIndex=%04x wLength=%04x\n",
 658                         ctrl.bRequest, ctrl.bRequestType, ctrl.wValue,
 659                                 ctrl.wIndex, ctrl.wLength);
 660                 if (usbfs_snoop) {
 661                         dev_info(&dev->dev, "control write: data: ");
 662                         for (j = 0; j < ctrl.wLength; ++j)
 663                                 printk("%02x ", (unsigned char)(tbuf)[j]);
 664                         printk("\n");
 665                 }
 666                 usb_unlock_device(dev);
 667                 i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType,
 668                                        ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo);
 669                 usb_lock_device(dev);
 670         }
 671         free_page((unsigned long)tbuf);
 672         if (i<0 && i != -EPIPE) {
 673                 dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL "
 674                            "failed cmd %s rqt %u rq %u len %u ret %d\n",
 675                            current->comm, ctrl.bRequestType, ctrl.bRequest,
 676                            ctrl.wLength, i);
 677         }
 678         return i;
 679 }
 680
 681 static int proc_bulk(struct dev_state *ps, void __user *arg)
 682 {
 683         struct usb_device *dev = ps->dev;
 684         struct usbdevfs_bulktransfer bulk;
 685         unsigned int tmo, len1, pipe;
 686         int len2;
 687         unsigned char *tbuf;
 688         int i, j, ret;
 689
 690         if (copy_from_user(&bulk, arg, sizeof(bulk)))
 691                 return -EFAULT;
 692         if ((ret = findintfep(ps->dev, bulk.ep)) < 0)
 693                 return ret;
 694         if ((ret = checkintf(ps, ret)))
 695                 return ret;
 696         if (bulk.ep & USB_DIR_IN)
 697                 pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f);
 698         else
 699                 pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f);
 700         if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN)))
 701                 return -EINVAL;
 702         len1 = bulk.len;
 703         if (len1 > MAX_USBFS_BUFFER_SIZE)
 704                 return -EINVAL;
 705         if (!(tbuf = kmalloc(len1, GFP_KERNEL)))
 706                 return -ENOMEM;
 707         tmo = bulk.timeout;
 708         if (bulk.ep & 0x80) {
 709                 if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) {
 710                         kfree(tbuf);
 711                         return -EINVAL;
 712                 }
 713                 snoop(&dev->dev, "bulk read: len=0x%02x timeout=%04d\n",
 714                         bulk.len, bulk.timeout);
 715                 usb_unlock_device(dev);
 716                 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
 717                 usb_lock_device(dev);
 718                 if (!i && len2) {
 719                         if (usbfs_snoop) {
 720                                 dev_info(&dev->dev, "bulk read: data ");
 721                                 for (j = 0; j < len2; ++j)
 722                                         printk("%02x ", (unsigned char)(tbuf)[j]);
 723                                 printk("\n");
 724                         }
 725                         if (copy_to_user(bulk.data, tbuf, len2)) {
 726                                 kfree(tbuf);
 727                                 return -EFAULT;
 728                         }
 729                 }
 730         } else {
 731                 if (len1) {
 732                         if (copy_from_user(tbuf, bulk.data, len1)) {
 733                                 kfree(tbuf);
 734                                 return -EFAULT;
 735                         }
 736                 }
 737                 snoop(&dev->dev, "bulk write: len=0x%02x timeout=%04d\n",
 738                         bulk.len, bulk.timeout);
 739                 if (usbfs_snoop) {
 740                         dev_info(&dev->dev, "bulk write: data: ");
 741                         for (j = 0; j < len1; ++j)
 742                                 printk("%02x ", (unsigned char)(tbuf)[j]);
 743                         printk("\n");
 744                 }
 745                 usb_unlock_device(dev);
 746                 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
 747                 usb_lock_device(dev);
 748         }
 749         kfree(tbuf);
 750         if (i < 0)
 751                 return i;
 752         return len2;
 753 }
 754
 755 static int proc_resetep(struct dev_state *ps, void __user *arg)
 756 {
 757         unsigned int ep;
 758         int ret;
 759
 760         if (get_user(ep, (unsigned int __user *)arg))
 761                 return -EFAULT;
 762         if ((ret = findintfep(ps->dev, ep)) < 0)
 763                 return ret;
 764         if ((ret = checkintf(ps, ret)))
 765                 return ret;
 766         usb_settoggle(ps->dev, ep & 0xf, !(ep & USB_DIR_IN), 0);
 767         return 0;
 768 }
 769
 770 static int proc_clearhalt(struct dev_state *ps, void __user *arg)
 771 {
 772         unsigned int ep;
 773         int pipe;
 774         int ret;
 775
 776         if (get_user(ep, (unsigned int __user *)arg))
 777                 return -EFAULT;
 778         if ((ret = findintfep(ps->dev, ep)) < 0)
 779                 return ret;
 780         if ((ret = checkintf(ps, ret)))
 781                 return ret;
 782         if (ep & USB_DIR_IN)
 783                 pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f);
 784         else
 785                 pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f);
 786
 787         return usb_clear_halt(ps->dev, pipe);
 788 }
 789
 790
 791 static int proc_getdriver(struct dev_state *ps, void __user *arg)
 792 {
 793         struct usbdevfs_getdriver gd;
 794         struct usb_interface *intf;
 795         int ret;
 796
 797         if (copy_from_user(&gd, arg, sizeof(gd)))
 798                 return -EFAULT;
 799         down_read(&usb_bus_type.subsys.rwsem);
 800         intf = usb_ifnum_to_if(ps->dev, gd.interface);
 801         if (!intf || !intf->dev.driver)
 802                 ret = -ENODATA;
 803         else {
 804                 strncpy(gd.driver, intf->dev.driver->name,
 805                                 sizeof(gd.driver));
 806                 ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0);
 807         }
 808         up_read(&usb_bus_type.subsys.rwsem);
 809         return ret;
 810 }
 811
 812 static int proc_connectinfo(struct dev_state *ps, void __user *arg)
 813 {
 814         struct usbdevfs_connectinfo ci;
 815
 816         ci.devnum = ps->dev->devnum;
 817         ci.slow = ps->dev->speed == USB_SPEED_LOW;
 818         if (copy_to_user(arg, &ci, sizeof(ci)))
 819                 return -EFAULT;
 820         return 0;
 821 }
 822
 823 static int proc_resetdevice(struct dev_state *ps)
 824 {
 825         return usb_reset_device(ps->dev);
 826
 827 }
 828
 829 static int proc_setintf(struct dev_state *ps, void __user *arg)
 830 {
 831         struct usbdevfs_setinterface setintf;
 832         int ret;
 833
 834         if (copy_from_user(&setintf, arg, sizeof(setintf)))
 835                 return -EFAULT;
 836         if ((ret = checkintf(ps, setintf.interface)))
 837                 return ret;
 838         return usb_set_interface(ps->dev, setintf.interface,
 839                         setintf.altsetting);
 840 }
 841
 842 static int proc_setconfig(struct dev_state *ps, void __user *arg)
 843 {
 844         unsigned int u;
 845         int status = 0;
 846         struct usb_host_config *actconfig;
 847
 848         if (get_user(u, (unsigned int __user *)arg))
 849                 return -EFAULT;
 850
 851         actconfig = ps->dev->actconfig;
 852
 853         /* Don't touch the device if any interfaces are claimed.
 854          * It could interfere with other drivers' operations, and if
 855          * an interface is claimed by usbfs it could easily deadlock.
 856          */
 857         if (actconfig) {
 858                 int i;
 859
 860                 for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) {
 861                         if (usb_interface_claimed(actconfig->interface[i])) {
 862                                 dev_warn (&ps->dev->dev,
 863                                         "usbfs: interface %d claimed by %s "
 864                                         "while '%s' sets config #%d\n",
 865                                         actconfig->interface[i]
 866                                                 ->cur_altsetting
 867                                                 ->desc.bInterfaceNumber,
 868                                         actconfig->interface[i]
 869                                                 ->dev.driver->name,
 870                                         current->comm, u);
 871                                 status = -EBUSY;
 872                                 break;
 873                         }
 874                 }
 875         }
 876
 877         /* SET_CONFIGURATION is often abused as a "cheap" driver reset,
 878          * so avoid usb_set_configuration()'s kick to sysfs
 879          */
 880         if (status == 0) {
 881                 if (actconfig && actconfig->desc.bConfigurationValue == u)
 882                         status = usb_reset_configuration(ps->dev);
 883                 else
 884                         status = usb_set_configuration(ps->dev, u);
 885         }
 886
 887         return status;
 888 }
 889
 890 static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
 891                              struct usbdevfs_iso_packet_desc __user *iso_frame_desc,
 892                              void __user *arg)
 893 {
 894         struct usbdevfs_iso_packet_desc *isopkt = NULL;
 895         struct usb_host_endpoint *ep;
 896         struct async *as;
 897         struct usb_ctrlrequest *dr = NULL;
 898         unsigned int u, totlen, isofrmlen;
 899         int ret, interval = 0, ifnum = -1;
 900
 901         if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP|USBDEVFS_URB_SHORT_NOT_OK|
 902                            URB_NO_FSBR|URB_ZERO_PACKET))
 903                 return -EINVAL;
 904         if (!uurb->buffer)
 905                 return -EINVAL;
 906         if (uurb->signr != 0 && (uurb->signr < SIGRTMIN || uurb->signr > SIGRTMAX))
 907                 return -EINVAL;
 908         if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL && (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) {
 909                 if ((ifnum = findintfep(ps->dev, uurb->endpoint)) < 0)
 910                         return ifnum;
 911                 if ((ret = checkintf(ps, ifnum)))
 912                         return ret;
 913         }
 914         if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0)
 915                 ep = ps->dev->ep_in [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
 916         else
 917                 ep = ps->dev->ep_out [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
 918         if (!ep)
 919                 return -ENOENT;
 920         switch(uurb->type) {
 921         case USBDEVFS_URB_TYPE_CONTROL:
 922                 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
 923                                 != USB_ENDPOINT_XFER_CONTROL)
 924                         return -EINVAL;
 925                 /* min 8 byte setup packet, max arbitrary */
 926                 if (uurb->buffer_length < 8 || uurb->buffer_length > PAGE_SIZE)
 927                         return -EINVAL;
 928                 if (!(dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL)))
 929                         return -ENOMEM;
 930                 if (copy_from_user(dr, uurb->buffer, 8)) {
 931                         kfree(dr);
 932                         return -EFAULT;
 933                 }
 934                 if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) {
 935                         kfree(dr);
 936                         return -EINVAL;
 937                 }
 938                 if ((ret = check_ctrlrecip(ps, dr->bRequestType, le16_to_cpup(&dr->wIndex)))) {
 939                         kfree(dr);
 940                         return ret;
 941                 }
 942                 uurb->endpoint = (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) | (dr->bRequestType & USB_ENDPOINT_DIR_MASK);
 943                 uurb->number_of_packets = 0;
 944                 uurb->buffer_length = le16_to_cpup(&dr->wLength);
 945                 uurb->buffer += 8;
 946                 if (!access_ok((uurb->endpoint & USB_DIR_IN) ?  VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) {
 947                         kfree(dr);
 948                         return -EFAULT;
 949                 }
 950                 snoop(&ps->dev->dev, "control urb\n");
 951                 break;
 952
 953         case USBDEVFS_URB_TYPE_BULK:
 954                 switch (ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
 955                 case USB_ENDPOINT_XFER_CONTROL:
 956                 case USB_ENDPOINT_XFER_ISOC:
 957                         return -EINVAL;
 958                 /* allow single-shot interrupt transfers, at bogus rates */
 959                 }
 960                 uurb->number_of_packets = 0;
 961                 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE)
 962                         return -EINVAL;
 963                 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length))
 964                         return -EFAULT;
 965                 snoop(&ps->dev->dev, "bulk urb\n");
 966                 break;
 967
 968         case USBDEVFS_URB_TYPE_ISO:
 969                 /* arbitrary limit */
 970                 if (uurb->number_of_packets < 1 || uurb->number_of_packets > 128)
 971                         return -EINVAL;
 972                 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
 973                                 != USB_ENDPOINT_XFER_ISOC)
 974                         return -EINVAL;
 975                 interval = 1 << min (15, ep->desc.bInterval - 1);
 976                 isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * uurb->number_of_packets;
 977                 if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL)))
 978                         return -ENOMEM;
 979                 if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) {
 980                         kfree(isopkt);
 981                         return -EFAULT;
 982                 }
 983                 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
 984                         if (isopkt[u].length > 1023) {
 985                                 kfree(isopkt);
 986                                 return -EINVAL;
 987                         }
 988                         totlen += isopkt[u].length;
 989                 }
 990                 if (totlen > 32768) {
 991                         kfree(isopkt);
 992                         return -EINVAL;
 993                 }
 994                 uurb->buffer_length = totlen;
 995                 snoop(&ps->dev->dev, "iso urb\n");
 996                 break;
 997
 998         case USBDEVFS_URB_TYPE_INTERRUPT:
 999                 uurb->number_of_packets = 0;
1000                 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
1001                                 != USB_ENDPOINT_XFER_INT)
1002                         return -EINVAL;
1003                 if (ps->dev->speed == USB_SPEED_HIGH)
1004                         interval = 1 << min (15, ep->desc.bInterval - 1);
1005                 else
1006                         interval = ep->desc.bInterval;
1007                 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE)
1008                         return -EINVAL;
1009                 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length))
1010                         return -EFAULT;
1011                 snoop(&ps->dev->dev, "interrupt urb\n");
1012                 break;
1013
1014         default:
1015                 return -EINVAL;
1016         }
1017         if (!(as = alloc_async(uurb->number_of_packets))) {
1018                 kfree(isopkt);
1019                 kfree(dr);
1020                 return -ENOMEM;
1021         }
1022         if (!(as->urb->transfer_buffer = kmalloc(uurb->buffer_length, GFP_KERNEL))) {
1023                 kfree(isopkt);
1024                 kfree(dr);
1025                 free_async(as);
1026                 return -ENOMEM;
1027         }
1028         as->urb->dev = ps->dev;
1029         as->urb->pipe = (uurb->type << 30) | __create_pipe(ps->dev, uurb->endpoint & 0xf) | (uurb->endpoint & USB_DIR_IN);
1030         as->urb->transfer_flags = uurb->flags;
1031         as->urb->transfer_buffer_length = uurb->buffer_length;
1032         as->urb->setup_packet = (unsigned char*)dr;
1033         as->urb->start_frame = uurb->start_frame;
1034         as->urb->number_of_packets = uurb->number_of_packets;
1035         as->urb->interval = interval;
1036         as->urb->context = as;
1037         as->urb->complete = async_completed;
1038         for (totlen = u = 0; u < uurb->number_of_packets; u++) {
1039                 as->urb->iso_frame_desc[u].offset = totlen;
1040                 as->urb->iso_frame_desc[u].length = isopkt[u].length;
1041                 totlen += isopkt[u].length;
1042         }
1043         kfree(isopkt);
1044         as->ps = ps;
1045         as->userurb = arg;
1046         if (uurb->endpoint & USB_DIR_IN)
1047                 as->userbuffer = uurb->buffer;
1048         else
1049                 as->userbuffer = NULL;
1050         as->signr = uurb->signr;
1051         as->ifnum = ifnum;
1052         as->pid = current->pid;
1053         as->uid = current->uid;
1054         as->euid = current->euid;
1055         if (!(uurb->endpoint & USB_DIR_IN)) {
1056                 if (copy_from_user(as->urb->transfer_buffer, uurb->buffer, as->urb->transfer_buffer_length)) {
1057                         free_async(as);
1058                         return -EFAULT;
1059                 }
1060         }
1061         snoop(&as->urb->dev->dev, "submit urb\n");
1062         snoop_urb(as->urb, as->userurb);
1063         async_newpending(as);
1064         if ((ret = usb_submit_urb(as->urb, GFP_KERNEL))) {
1065                 dev_printk(KERN_DEBUG, &ps->dev->dev, "usbfs: usb_submit_urb returned %d\n", ret);
1066                 async_removepending(as);
1067                 free_async(as);
1068                 return ret;
1069         }
1070         return 0;
1071 }
1072
1073 static int proc_submiturb(struct dev_state *ps, void __user *arg)
1074 {
1075         struct usbdevfs_urb uurb;
1076
1077         if (copy_from_user(&uurb, arg, sizeof(uurb)))
1078                 return -EFAULT;
1079
1080         return proc_do_submiturb(ps, &uurb, (((struct usbdevfs_urb __user *)arg)->iso_frame_desc), arg);
1081 }
1082
1083 static int proc_unlinkurb(struct dev_state *ps, void __user *arg)
1084 {
1085         struct async *as;
1086
1087         as = async_getpending(ps, arg);
1088         if (!as)
1089                 return -EINVAL;
1090         usb_kill_urb(as->urb);
1091         return 0;
1092 }
1093
1094 static int processcompl(struct async *as, void __user * __user *arg)
1095 {
1096         struct urb *urb = as->urb;
1097         struct usbdevfs_urb __user *userurb = as->userurb;
1098         void __user *addr = as->userurb;
1099         unsigned int i;
1100
1101         if (as->userbuffer)
1102                 if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length))
1103                         return -EFAULT;
1104         if (put_user(urb->status, &userurb->status))
1105                 return -EFAULT;
1106         if (put_user(urb->actual_length, &userurb->actual_length))
1107                 return -EFAULT;
1108         if (put_user(urb->error_count, &userurb->error_count))
1109                 return -EFAULT;
1110
1111         if (usb_pipeisoc(urb->pipe)) {
1112                 for (i = 0; i < urb->number_of_packets; i++) {
1113                         if (put_user(urb->iso_frame_desc[i].actual_length,
1114                                      &userurb->iso_frame_desc[i].actual_length))
1115                                 return -EFAULT;
1116                         if (put_user(urb->iso_frame_desc[i].status,
1117                                      &userurb->iso_frame_desc[i].status))
1118                                 return -EFAULT;
1119                 }
1120         }
1121
1122         free_async(as);
1123
1124         if (put_user(addr, (void __user * __user *)arg))
1125                 return -EFAULT;
1126         return 0;
1127 }
1128
1129 static struct async* reap_as(struct dev_state *ps)
1130 {
1131         DECLARE_WAITQUEUE(wait, current);
1132         struct async *as = NULL;
1133         struct usb_device *dev = ps->dev;
1134
1135         add_wait_queue(&ps->wait, &wait);
1136         for (;;) {
1137                 __set_current_state(TASK_INTERRUPTIBLE);
1138                 if ((as = async_getcompleted(ps)))
1139                         break;
1140                 if (signal_pending(current))
1141                         break;
1142                 usb_unlock_device(dev);
1143                 schedule();
1144                 usb_lock_device(dev);
1145         }
1146         remove_wait_queue(&ps->wait, &wait);
1147         set_current_state(TASK_RUNNING);
1148         return as;
1149 }
1150
1151 static int proc_reapurb(struct dev_state *ps, void __user *arg)
1152 {
1153         struct async *as = reap_as(ps);
1154         if (as)
1155                 return processcompl(as, (void __user * __user *)arg);
1156         if (signal_pending(current))
1157                 return -EINTR;
1158         return -EIO;
1159 }
1160
1161 static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg)
1162 {
1163         struct async *as;
1164
1165         if (!(as = async_getcompleted(ps)))
1166                 return -EAGAIN;
1167         return processcompl(as, (void __user * __user *)arg);
1168 }
1169
1170 #ifdef CONFIG_COMPAT
1171
1172 static int get_urb32(struct usbdevfs_urb *kurb,
1173                      struct usbdevfs_urb32 __user *uurb)
1174 {
1175         __u32  uptr;
1176         if (get_user(kurb->type, &uurb->type) ||
1177             __get_user(kurb->endpoint, &uurb->endpoint) ||
1178             __get_user(kurb->status, &uurb->status) ||
1179             __get_user(kurb->flags, &uurb->flags) ||
1180             __get_user(kurb->buffer_length, &uurb->buffer_length) ||
1181             __get_user(kurb->actual_length, &uurb->actual_length) ||
1182             __get_user(kurb->start_frame, &uurb->start_frame) ||
1183             __get_user(kurb->number_of_packets, &uurb->number_of_packets) ||
1184             __get_user(kurb->error_count, &uurb->error_count) ||
1185             __get_user(kurb->signr, &uurb->signr))
1186                 return -EFAULT;
1187
1188         if (__get_user(uptr, &uurb->buffer))
1189                 return -EFAULT;
1190         kurb->buffer = compat_ptr(uptr);
1191         if (__get_user(uptr, &uurb->buffer))
1192                 return -EFAULT;
1193         kurb->usercontext = compat_ptr(uptr);
1194
1195         return 0;
1196 }
1197
1198 static int proc_submiturb_compat(struct dev_state *ps, void __user *arg)
1199 {
1200         struct usbdevfs_urb uurb;
1201
1202         if (get_urb32(&uurb,(struct usbdevfs_urb32 *)arg))
1203                 return -EFAULT;
1204
1205         return proc_do_submiturb(ps, &uurb, ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc, arg);
1206 }
1207
1208 static int processcompl_compat(struct async *as, void __user * __user *arg)
1209 {
1210         struct urb *urb = as->urb;
1211         struct usbdevfs_urb32 __user *userurb = as->userurb;
1212         void __user *addr = as->userurb;
1213         unsigned int i;
1214
1215         if (as->userbuffer)
1216                 if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length))
1217                         return -EFAULT;
1218         if (put_user(urb->status, &userurb->status))
1219                 return -EFAULT;
1220         if (put_user(urb->actual_length, &userurb->actual_length))
1221                 return -EFAULT;
1222         if (put_user(urb->error_count, &userurb->error_count))
1223                 return -EFAULT;
1224
1225         if (usb_pipeisoc(urb->pipe)) {
1226                 for (i = 0; i < urb->number_of_packets; i++) {
1227                         if (put_user(urb->iso_frame_desc[i].actual_length,
1228                                      &userurb->iso_frame_desc[i].actual_length))
1229                                 return -EFAULT;
1230                         if (put_user(urb->iso_frame_desc[i].status,
1231                                      &userurb->iso_frame_desc[i].status))
1232                                 return -EFAULT;
1233                 }
1234         }
1235
1236         free_async(as);
1237         if (put_user((u32)(u64)addr, (u32 __user *)arg))
1238                 return -EFAULT;
1239         return 0;
1240 }
1241
1242 static int proc_reapurb_compat(struct dev_state *ps, void __user *arg)
1243 {
1244         struct async *as = reap_as(ps);
1245         if (as)
1246                 return processcompl_compat(as, (void __user * __user *)arg);
1247         if (signal_pending(current))
1248                 return -EINTR;
1249         return -EIO;
1250 }
1251
1252 static int proc_reapurbnonblock_compat(struct dev_state *ps, void __user *arg)
1253 {
1254         struct async *as;
1255
1256         if (!(as = async_getcompleted(ps)))
1257                 return -EAGAIN;
1258         return processcompl_compat(as, (void __user * __user *)arg);
1259 }
1260
1261 #endif
1262
1263 static int proc_disconnectsignal(struct dev_state *ps, void __user *arg)
1264 {
1265         struct usbdevfs_disconnectsignal ds;
1266
1267         if (copy_from_user(&ds, arg, sizeof(ds)))
1268                 return -EFAULT;
1269         if (ds.signr != 0 && (ds.signr < SIGRTMIN || ds.signr > SIGRTMAX))
1270                 return -EINVAL;
1271         ps->discsignr = ds.signr;
1272         ps->disccontext = ds.context;
1273         return 0;
1274 }
1275
1276 static int proc_claiminterface(struct dev_state *ps, void __user *arg)
1277 {
1278         unsigned int ifnum;
1279
1280         if (get_user(ifnum, (unsigned int __user *)arg))
1281                 return -EFAULT;
1282         return claimintf(ps, ifnum);
1283 }
1284
1285 static int proc_releaseinterface(struct dev_state *ps, void __user *arg)
1286 {
1287         unsigned int ifnum;
1288         int ret;
1289
1290         if (get_user(ifnum, (unsigned int __user *)arg))
1291                 return -EFAULT;
1292         if ((ret = releaseintf(ps, ifnum)) < 0)
1293                 return ret;
1294         destroy_async_on_interface (ps, ifnum);
1295         return 0;
1296 }
1297
1298 static int proc_ioctl(struct dev_state *ps, struct usbdevfs_ioctl *ctl)
1299 {
1300         int                     size;
1301         void                    *buf = NULL;
1302         int                     retval = 0;
1303         struct usb_interface    *intf = NULL;
1304         struct usb_driver       *driver = NULL;
1305
1306         /* alloc buffer */
1307         if ((size = _IOC_SIZE (ctl->ioctl_code)) > 0) {
1308                 if ((buf = kmalloc (size, GFP_KERNEL)) == NULL)
1309                         return -ENOMEM;
1310                 if ((_IOC_DIR(ctl->ioctl_code) & _IOC_WRITE)) {
1311                         if (copy_from_user (buf, ctl->data, size)) {
1312                                 kfree(buf);
1313                                 return -EFAULT;
1314                         }
1315                 } else {
1316                         memset (buf, 0, size);
1317                 }
1318         }
1319
1320         if (!connected(ps->dev)) {
1321                 kfree(buf);
1322                 return -ENODEV;
1323         }
1324
1325         if (ps->dev->state != USB_STATE_CONFIGURED)
1326                 retval = -EHOSTUNREACH;
1327         else if (!(intf = usb_ifnum_to_if (ps->dev, ctl->ifno)))
1328                retval = -EINVAL;
1329         else switch (ctl->ioctl_code) {
1330
1331         /* disconnect kernel driver from interface */
1332         case USBDEVFS_DISCONNECT:
1333
1334                 down_write(&usb_bus_type.subsys.rwsem);
1335                 if (intf->dev.driver) {
1336                         driver = to_usb_driver(intf->dev.driver);
1337                         dev_dbg (&intf->dev, "disconnect by usbfs\n");
1338                         usb_driver_release_interface(driver, intf);
1339                 } else
1340                         retval = -ENODATA;
1341                 up_write(&usb_bus_type.subsys.rwsem);
1342                 break;
1343
1344         /* let kernel drivers try to (re)bind to the interface */
1345         case USBDEVFS_CONNECT:
1346                 usb_unlock_device(ps->dev);
1347                 bus_rescan_devices(intf->dev.bus);
1348                 usb_lock_device(ps->dev);
1349                 break;
1350
1351         /* talk directly to the interface's driver */
1352         default:
1353                 down_read(&usb_bus_type.subsys.rwsem);
1354                 if (intf->dev.driver)
1355                         driver = to_usb_driver(intf->dev.driver);
1356                 if (driver == NULL || driver->ioctl == NULL) {
1357                         retval = -ENOTTY;
1358                 } else {
1359                         retval = driver->ioctl (intf, ctl->ioctl_code, buf);
1360                         if (retval == -ENOIOCTLCMD)
1361                                 retval = -ENOTTY;
1362                 }
1363                 up_read(&usb_bus_type.subsys.rwsem);
1364         }
1365
1366         /* cleanup and return */
1367         if (retval >= 0
1368                         && (_IOC_DIR (ctl->ioctl_code) & _IOC_READ) != 0
1369                         && size > 0
1370                         && copy_to_user (ctl->data, buf, size) != 0)
1371                 retval = -EFAULT;
1372
1373         kfree(buf);
1374         return retval;
1375 }
1376
1377 static int proc_ioctl_default(struct dev_state *ps, void __user *arg)
1378 {
1379         struct usbdevfs_ioctl   ctrl;
1380
1381         if (copy_from_user(&ctrl, arg, sizeof (ctrl)))
1382                 return -EFAULT;
1383         return proc_ioctl(ps, &ctrl);
1384 }
1385
1386 #ifdef CONFIG_COMPAT
1387 static int proc_ioctl_compat(struct dev_state *ps, compat_uptr_t arg)
1388 {
1389         struct usbdevfs_ioctl32 __user *uioc;
1390         struct usbdevfs_ioctl ctrl;
1391         u32 udata;
1392
1393         uioc = compat_ptr((long)arg);
1394         if (get_user(ctrl.ifno, &uioc->ifno) ||
1395             get_user(ctrl.ioctl_code, &uioc->ioctl_code) ||
1396             __get_user(udata, &uioc->data))
1397                 return -EFAULT;
1398         ctrl.data = compat_ptr(udata);
1399
1400         return proc_ioctl(ps, &ctrl);
1401 }
1402 #endif
1403
1404 /*
1405  * NOTE:  All requests here that have interface numbers as parameters
1406  * are assuming that somehow the configuration has been prevented from
1407  * changing.  But there's no mechanism to ensure that...
1408  */
1409 static int usbdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
1410 {
1411         struct dev_state *ps = (struct dev_state *)file->private_data;
1412         struct usb_device *dev = ps->dev;
1413         void __user *p = (void __user *)arg;
1414         int ret = -ENOTTY;
1415
1416         if (!(file->f_mode & FMODE_WRITE))
1417                 return -EPERM;
1418         usb_lock_device(dev);
1419         if (!connected(dev)) {
1420                 usb_unlock_device(dev);
1421                 return -ENODEV;
1422         }
1423
1424         switch (cmd) {
1425         case USBDEVFS_CONTROL:
1426                 snoop(&dev->dev, "%s: CONTROL\n", __FUNCTION__);
1427                 ret = proc_control(ps, p);
1428                 if (ret >= 0)
1429                         inode->i_mtime = CURRENT_TIME;
1430                 break;
1431
1432         case USBDEVFS_BULK:
1433                 snoop(&dev->dev, "%s: BULK\n", __FUNCTION__);
1434                 ret = proc_bulk(ps, p);
1435                 if (ret >= 0)
1436                         inode->i_mtime = CURRENT_TIME;
1437                 break;
1438
1439         case USBDEVFS_RESETEP:
1440                 snoop(&dev->dev, "%s: RESETEP\n", __FUNCTION__);
1441                 ret = proc_resetep(ps, p);
1442                 if (ret >= 0)
1443                         inode->i_mtime = CURRENT_TIME;
1444                 break;
1445
1446         case USBDEVFS_RESET:
1447                 snoop(&dev->dev, "%s: RESET\n", __FUNCTION__);
1448                 ret = proc_resetdevice(ps);
1449                 break;
1450
1451         case USBDEVFS_CLEAR_HALT:
1452                 snoop(&dev->dev, "%s: CLEAR_HALT\n", __FUNCTION__);
1453                 ret = proc_clearhalt(ps, p);
1454                 if (ret >= 0)
1455                         inode->i_mtime = CURRENT_TIME;
1456                 break;
1457
1458         case USBDEVFS_GETDRIVER:
1459                 snoop(&dev->dev, "%s: GETDRIVER\n", __FUNCTION__);
1460                 ret = proc_getdriver(ps, p);
1461                 break;
1462
1463         case USBDEVFS_CONNECTINFO:
1464                 snoop(&dev->dev, "%s: CONNECTINFO\n", __FUNCTION__);
1465                 ret = proc_connectinfo(ps, p);
1466                 break;
1467
1468         case USBDEVFS_SETINTERFACE:
1469                 snoop(&dev->dev, "%s: SETINTERFACE\n", __FUNCTION__);
1470                 ret = proc_setintf(ps, p);
1471                 break;
1472
1473         case USBDEVFS_SETCONFIGURATION:
1474                 snoop(&dev->dev, "%s: SETCONFIGURATION\n", __FUNCTION__);
1475                 ret = proc_setconfig(ps, p);
1476                 break;
1477
1478         case USBDEVFS_SUBMITURB:
1479                 snoop(&dev->dev, "%s: SUBMITURB\n", __FUNCTION__);
1480                 ret = proc_submiturb(ps, p);
1481                 if (ret >= 0)
1482                         inode->i_mtime = CURRENT_TIME;
1483                 break;
1484
1485 #ifdef CONFIG_COMPAT
1486
1487         case USBDEVFS_SUBMITURB32:
1488                 snoop(&dev->dev, "%s: SUBMITURB32\n", __FUNCTION__);
1489                 ret = proc_submiturb_compat(ps, p);
1490                 if (ret >= 0)
1491                         inode->i_mtime = CURRENT_TIME;
1492                 break;
1493
1494         case USBDEVFS_REAPURB32:
1495                 snoop(&dev->dev, "%s: REAPURB32\n", __FUNCTION__);
1496                 ret = proc_reapurb_compat(ps, p);
1497                 break;
1498
1499         case USBDEVFS_REAPURBNDELAY32:
1500                 snoop(&dev->dev, "%s: REAPURBDELAY32\n", __FUNCTION__);
1501                 ret = proc_reapurbnonblock_compat(ps, p);
1502                 break;
1503
1504         case USBDEVFS_IOCTL32:
1505                 snoop(&dev->dev, "%s: IOCTL\n", __FUNCTION__);
1506                 ret = proc_ioctl_compat(ps, (compat_uptr_t)(long)p);
1507                 break;
1508 #endif
1509
1510         case USBDEVFS_DISCARDURB:
1511                 snoop(&dev->dev, "%s: DISCARDURB\n", __FUNCTION__);
1512                 ret = proc_unlinkurb(ps, p);
1513                 break;
1514
1515         case USBDEVFS_REAPURB:
1516                 snoop(&dev->dev, "%s: REAPURB\n", __FUNCTION__);
1517                 ret = proc_reapurb(ps, p);
1518                 break;
1519
1520         case USBDEVFS_REAPURBNDELAY:
1521                 snoop(&dev->dev, "%s: REAPURBDELAY\n", __FUNCTION__);
1522                 ret = proc_reapurbnonblock(ps, p);
1523                 break;
1524
1525         case USBDEVFS_DISCSIGNAL:
1526                 snoop(&dev->dev, "%s: DISCSIGNAL\n", __FUNCTION__);
1527                 ret = proc_disconnectsignal(ps, p);
1528                 break;
1529
1530         case USBDEVFS_CLAIMINTERFACE:
1531                 snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __FUNCTION__);
1532                 ret = proc_claiminterface(ps, p);
1533                 break;
1534
1535         case USBDEVFS_RELEASEINTERFACE:
1536                 snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __FUNCTION__);
1537                 ret = proc_releaseinterface(ps, p);
1538                 break;
1539
1540         case USBDEVFS_IOCTL:
1541                 snoop(&dev->dev, "%s: IOCTL\n", __FUNCTION__);
1542                 ret = proc_ioctl_default(ps, p);
1543                 break;
1544         }
1545         usb_unlock_device(dev);
1546         if (ret >= 0)
1547                 inode->i_atime = CURRENT_TIME;
1548         return ret;
1549 }
1550
1551 /* No kernel lock - fine */
1552 static unsigned int usbdev_poll(struct file *file, struct poll_table_struct *wait)
1553 {
1554         struct dev_state *ps = (struct dev_state *)file->private_data;
1555         unsigned int mask = 0;
1556
1557         poll_wait(file, &ps->wait, wait);
1558         if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed))
1559                 mask |= POLLOUT | POLLWRNORM;
1560         if (!connected(ps->dev))
1561                 mask |= POLLERR | POLLHUP;
1562         return mask;
1563 }
1564
1565 struct file_operations usbfs_device_file_operations = {
1566         .llseek =       usbdev_lseek,
1567         .read =         usbdev_read,
1568         .poll =         usbdev_poll,
1569         .ioctl =        usbdev_ioctl,
1570         .open =         usbdev_open,
1571         .release =      usbdev_release,
1572 };
1573
1574 static void usbdev_add(struct usb_device *dev)
1575 {
1576         int minor = ((dev->bus->busnum-1) * 128) + (dev->devnum-1);
1577
1578         dev->class_dev = class_device_create(usb_device_class, NULL,
1579                                 MKDEV(USB_DEVICE_MAJOR, minor), &dev->dev,
1580                                 "usbdev%d.%d", dev->bus->busnum, dev->devnum);
1581
1582         dev->class_dev->class_data = dev;
1583 }
1584
1585 static void usbdev_remove(struct usb_device *dev)
1586 {
1587         class_device_unregister(dev->class_dev);
1588 }
1589
1590 static int usbdev_notify(struct notifier_block *self, unsigned long action,
1591                          void *dev)
1592 {
1593         switch (action) {
1594         case USB_DEVICE_ADD:
1595                 usbdev_add(dev);
1596                 break;
1597         case USB_DEVICE_REMOVE:
1598                 usbdev_remove(dev);
1599                 break;
1600         }
1601         return NOTIFY_OK;
1602 }
1603
1604 static struct notifier_block usbdev_nb = {
1605         .notifier_call =        usbdev_notify,
1606 };
1607
1608 static struct cdev usb_device_cdev = {
1609         .kobj   = {.name = "usb_device", },
1610         .owner  = THIS_MODULE,
1611 };
1612
1613 int __init usbdev_init(void)
1614 {
1615         int retval;
1616
1617         retval = register_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX,
1618                         "usb_device");
1619         if (retval) {
1620                 err("unable to register minors for usb_device");
1621                 goto out;
1622         }
1623         cdev_init(&usb_device_cdev, &usbfs_device_file_operations);
1624         retval = cdev_add(&usb_device_cdev, USB_DEVICE_DEV, USB_DEVICE_MAX);
1625         if (retval) {
1626                 err("unable to get usb_device major %d", USB_DEVICE_MAJOR);
1627                 goto error_cdev;
1628         }
1629         usb_device_class = class_create(THIS_MODULE, "usb_device");
1630         if (IS_ERR(usb_device_class)) {
1631                 err("unable to register usb_device class");
1632                 retval = PTR_ERR(usb_device_class);
1633                 goto error_class;
1634         }
1635
1636         usb_register_notify(&usbdev_nb);
1637
1638 out:
1639         return retval;
1640
1641 error_class:
1642         usb_device_class = NULL;
1643         cdev_del(&usb_device_cdev);
1644
1645 error_cdev:
1646         unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
1647         goto out;
1648 }
1649
1650 void usbdev_cleanup(void)
1651 {
1652         usb_unregister_notify(&usbdev_nb);
1653         class_destroy(usb_device_class);
1654         cdev_del(&usb_device_cdev);
1655         unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
1656 }
1657