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