[PATCH] USB: remove .owner field from struct usb_driver
[linux-2.6.git] / 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 *desc = kmalloc(sizeof(*desc), GFP_KERNEL);
138                 if (!desc) {
139                         ret = -ENOMEM;
140                         goto err;
141                 }
142                 memcpy(desc, &dev->descriptor, sizeof(dev->descriptor));
143                 le16_to_cpus(&desc->bcdUSB);
144                 le16_to_cpus(&desc->idVendor);
145                 le16_to_cpus(&desc->idProduct);
146                 le16_to_cpus(&desc->bcdDevice);
147
148                 len = sizeof(struct usb_device_descriptor) - pos;
149                 if (len > nbytes)
150                         len = nbytes;
151                 if (copy_to_user(buf, ((char *)desc) + pos, len)) {
152                         kfree(desc);
153                         ret = -EFAULT;
154                         goto err;
155                 }
156                 kfree(desc);
157
158                 *ppos += len;
159                 buf += len;
160                 nbytes -= len;
161                 ret += len;
162         }
163
164         pos = sizeof(struct usb_device_descriptor);
165         for (i = 0; nbytes && i < dev->descriptor.bNumConfigurations; i++) {
166                 struct usb_config_descriptor *config =
167                         (struct usb_config_descriptor *)dev->rawdescriptors[i];
168                 unsigned int length = le16_to_cpu(config->wTotalLength);
169
170                 if (*ppos < pos + length) {
171
172                         /* The descriptor may claim to be longer than it
173                          * really is.  Here is the actual allocated length. */
174                         unsigned alloclen =
175                                 le16_to_cpu(dev->config[i].desc.wTotalLength);
176
177                         len = length - (*ppos - pos);
178                         if (len > nbytes)
179                                 len = nbytes;
180
181                         /* Simply don't write (skip over) unallocated parts */
182                         if (alloclen > (*ppos - pos)) {
183                                 alloclen -= (*ppos - pos);
184                                 if (copy_to_user(buf,
185                                     dev->rawdescriptors[i] + (*ppos - pos),
186                                     min(len, alloclen))) {
187                                         ret = -EFAULT;
188                                         goto err;
189                                 }
190                         }
191
192                         *ppos += len;
193                         buf += len;
194                         nbytes -= len;
195                         ret += len;
196                 }
197
198                 pos += length;
199         }
200
201 err:
202         usb_unlock_device(dev);
203         return ret;
204 }
205
206 /*
207  * async list handling
208  */
209
210 static struct async *alloc_async(unsigned int numisoframes)
211 {
212         unsigned int assize = sizeof(struct async) + numisoframes * sizeof(struct usb_iso_packet_descriptor);
213         struct async *as = kzalloc(assize, GFP_KERNEL);
214
215         if (!as)
216                 return NULL;
217         as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL);
218         if (!as->urb) {
219                 kfree(as);
220                 return NULL;
221         }
222         return as;
223 }
224
225 static void free_async(struct async *as)
226 {
227         kfree(as->urb->transfer_buffer);
228         kfree(as->urb->setup_packet);
229         usb_free_urb(as->urb);
230         kfree(as);
231 }
232
233 static inline void async_newpending(struct async *as)
234 {
235         struct dev_state *ps = as->ps;
236         unsigned long flags;
237         
238         spin_lock_irqsave(&ps->lock, flags);
239         list_add_tail(&as->asynclist, &ps->async_pending);
240         spin_unlock_irqrestore(&ps->lock, flags);
241 }
242
243 static inline void async_removepending(struct async *as)
244 {
245         struct dev_state *ps = as->ps;
246         unsigned long flags;
247         
248         spin_lock_irqsave(&ps->lock, flags);
249         list_del_init(&as->asynclist);
250         spin_unlock_irqrestore(&ps->lock, flags);
251 }
252
253 static inline struct async *async_getcompleted(struct dev_state *ps)
254 {
255         unsigned long flags;
256         struct async *as = NULL;
257
258         spin_lock_irqsave(&ps->lock, flags);
259         if (!list_empty(&ps->async_completed)) {
260                 as = list_entry(ps->async_completed.next, struct async, asynclist);
261                 list_del_init(&as->asynclist);
262         }
263         spin_unlock_irqrestore(&ps->lock, flags);
264         return as;
265 }
266
267 static inline struct async *async_getpending(struct dev_state *ps, void __user *userurb)
268 {
269         unsigned long flags;
270         struct async *as;
271
272         spin_lock_irqsave(&ps->lock, flags);
273         list_for_each_entry(as, &ps->async_pending, asynclist)
274                 if (as->userurb == userurb) {
275                         list_del_init(&as->asynclist);
276                         spin_unlock_irqrestore(&ps->lock, flags);
277                         return as;
278                 }
279         spin_unlock_irqrestore(&ps->lock, flags);
280         return NULL;
281 }
282
283 static void snoop_urb(struct urb *urb, void __user *userurb)
284 {
285         int j;
286         unsigned char *data = urb->transfer_buffer;
287
288         if (!usbfs_snoop)
289                 return;
290
291         if (urb->pipe & USB_DIR_IN)
292                 dev_info(&urb->dev->dev, "direction=IN\n");
293         else
294                 dev_info(&urb->dev->dev, "direction=OUT\n");
295         dev_info(&urb->dev->dev, "userurb=%p\n", userurb);
296         dev_info(&urb->dev->dev, "transfer_buffer_length=%d\n",
297                  urb->transfer_buffer_length);
298         dev_info(&urb->dev->dev, "actual_length=%d\n", urb->actual_length);
299         dev_info(&urb->dev->dev, "data: ");
300         for (j = 0; j < urb->transfer_buffer_length; ++j)
301                 printk ("%02x ", data[j]);
302         printk("\n");
303 }
304
305 static void async_completed(struct urb *urb, struct pt_regs *regs)
306 {
307         struct async *as = (struct async *)urb->context;
308         struct dev_state *ps = as->ps;
309         struct siginfo sinfo;
310
311         spin_lock(&ps->lock);
312         list_move_tail(&as->asynclist, &ps->async_completed);
313         spin_unlock(&ps->lock);
314         if (as->signr) {
315                 sinfo.si_signo = as->signr;
316                 sinfo.si_errno = as->urb->status;
317                 sinfo.si_code = SI_ASYNCIO;
318                 sinfo.si_addr = as->userurb;
319                 kill_proc_info_as_uid(as->signr, &sinfo, as->pid, as->uid, 
320                                       as->euid);
321         }
322         snoop(&urb->dev->dev, "urb complete\n");
323         snoop_urb(urb, as->userurb);
324         wake_up(&ps->wait);
325 }
326
327 static void destroy_async (struct dev_state *ps, struct list_head *list)
328 {
329         struct async *as;
330         unsigned long flags;
331
332         spin_lock_irqsave(&ps->lock, flags);
333         while (!list_empty(list)) {
334                 as = list_entry(list->next, struct async, asynclist);
335                 list_del_init(&as->asynclist);
336
337                 /* drop the spinlock so the completion handler can run */
338                 spin_unlock_irqrestore(&ps->lock, flags);
339                 usb_kill_urb(as->urb);
340                 spin_lock_irqsave(&ps->lock, flags);
341         }
342         spin_unlock_irqrestore(&ps->lock, flags);
343         as = async_getcompleted(ps);
344         while (as) {
345                 free_async(as);
346                 as = async_getcompleted(ps);
347         }
348 }
349
350 static void destroy_async_on_interface (struct dev_state *ps, unsigned int ifnum)
351 {
352         struct list_head *p, *q, hitlist;
353         unsigned long flags;
354
355         INIT_LIST_HEAD(&hitlist);
356         spin_lock_irqsave(&ps->lock, flags);
357         list_for_each_safe(p, q, &ps->async_pending)
358                 if (ifnum == list_entry(p, struct async, asynclist)->ifnum)
359                         list_move_tail(p, &hitlist);
360         spin_unlock_irqrestore(&ps->lock, flags);
361         destroy_async(ps, &hitlist);
362 }
363
364 static inline void destroy_all_async(struct dev_state *ps)
365 {
366                 destroy_async(ps, &ps->async_pending);
367 }
368
369 /*
370  * interface claims are made only at the request of user level code,
371  * which can also release them (explicitly or by closing files).
372  * they're also undone when devices disconnect.
373  */
374
375 static int driver_probe (struct usb_interface *intf,
376                          const struct usb_device_id *id)
377 {
378         return -ENODEV;
379 }
380
381 static void driver_disconnect(struct usb_interface *intf)
382 {
383         struct dev_state *ps = usb_get_intfdata (intf);
384         unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber;
385
386         if (!ps)
387                 return;
388
389         /* NOTE:  this relies on usbcore having canceled and completed
390          * all pending I/O requests; 2.6 does that.
391          */
392
393         if (likely(ifnum < 8*sizeof(ps->ifclaimed)))
394                 clear_bit(ifnum, &ps->ifclaimed);
395         else
396                 warn("interface number %u out of range", ifnum);
397
398         usb_set_intfdata (intf, NULL);
399
400         /* force async requests to complete */
401         destroy_async_on_interface(ps, ifnum);
402 }
403
404 struct usb_driver usbfs_driver = {
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 static struct usb_device *usbdev_lookup_minor(int minor)
521 {
522         struct class_device *class_dev;
523         struct usb_device *dev = NULL;
524
525         down(&usb_device_class->sem);
526         list_for_each_entry(class_dev, &usb_device_class->children, node) {
527                 if (class_dev->devt == MKDEV(USB_DEVICE_MAJOR, minor)) {
528                         dev = class_dev->class_data;
529                         break;
530                 }
531         }
532         up(&usb_device_class->sem);
533
534         return dev;
535 };
536
537 /*
538  * file operations
539  */
540 static int usbdev_open(struct inode *inode, struct file *file)
541 {
542         struct usb_device *dev = NULL;
543         struct dev_state *ps;
544         int ret;
545
546         /* 
547          * no locking necessary here, as chrdev_open has the kernel lock
548          * (still acquire the kernel lock for safety)
549          */
550         ret = -ENOMEM;
551         if (!(ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL)))
552                 goto out_nolock;
553
554         lock_kernel();
555         ret = -ENOENT;
556         /* check if we are called from a real node or usbfs */
557         if (imajor(inode) == USB_DEVICE_MAJOR)
558                 dev = usbdev_lookup_minor(iminor(inode));
559         if (!dev)
560                 dev = inode->u.generic_ip;
561         if (!dev) {
562                 kfree(ps);
563                 goto out;
564         }
565         usb_get_dev(dev);
566         ret = 0;
567         ps->dev = dev;
568         ps->file = file;
569         spin_lock_init(&ps->lock);
570         INIT_LIST_HEAD(&ps->async_pending);
571         INIT_LIST_HEAD(&ps->async_completed);
572         init_waitqueue_head(&ps->wait);
573         ps->discsignr = 0;
574         ps->disc_pid = current->pid;
575         ps->disc_uid = current->uid;
576         ps->disc_euid = current->euid;
577         ps->disccontext = NULL;
578         ps->ifclaimed = 0;
579         wmb();
580         list_add_tail(&ps->list, &dev->filelist);
581         file->private_data = ps;
582  out:
583         unlock_kernel();
584  out_nolock:
585         return ret;
586 }
587
588 static int usbdev_release(struct inode *inode, struct file *file)
589 {
590         struct dev_state *ps = (struct dev_state *)file->private_data;
591         struct usb_device *dev = ps->dev;
592         unsigned int ifnum;
593
594         usb_lock_device(dev);
595         list_del_init(&ps->list);
596         for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed);
597                         ifnum++) {
598                 if (test_bit(ifnum, &ps->ifclaimed))
599                         releaseintf(ps, ifnum);
600         }
601         destroy_all_async(ps);
602         usb_unlock_device(dev);
603         usb_put_dev(dev);
604         ps->dev = NULL;
605         kfree(ps);
606         return 0;
607 }
608
609 static int proc_control(struct dev_state *ps, void __user *arg)
610 {
611         struct usb_device *dev = ps->dev;
612         struct usbdevfs_ctrltransfer ctrl;
613         unsigned int tmo;
614         unsigned char *tbuf;
615         int i, j, ret;
616
617         if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
618                 return -EFAULT;
619         if ((ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.wIndex)))
620                 return ret;
621         if (ctrl.wLength > PAGE_SIZE)
622                 return -EINVAL;
623         if (!(tbuf = (unsigned char *)__get_free_page(GFP_KERNEL)))
624                 return -ENOMEM;
625         tmo = ctrl.timeout;
626         if (ctrl.bRequestType & 0x80) {
627                 if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data, ctrl.wLength)) {
628                         free_page((unsigned long)tbuf);
629                         return -EINVAL;
630                 }
631                 snoop(&dev->dev, "control read: bRequest=%02x "
632                                 "bRrequestType=%02x wValue=%04x "
633                                 "wIndex=%04x wLength=%04x\n",
634                         ctrl.bRequest, ctrl.bRequestType, ctrl.wValue,
635                                 ctrl.wIndex, ctrl.wLength);
636
637                 usb_unlock_device(dev);
638                 i = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType,
639                                        ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo);
640                 usb_lock_device(dev);
641                 if ((i > 0) && ctrl.wLength) {
642                         if (usbfs_snoop) {
643                                 dev_info(&dev->dev, "control read: data ");
644                                 for (j = 0; j < i; ++j)
645                                         printk("%02x ", (unsigned char)(tbuf)[j]);
646                                 printk("\n");
647                         }
648                         if (copy_to_user(ctrl.data, tbuf, i)) {
649                                 free_page((unsigned long)tbuf);
650                                 return -EFAULT;
651                         }
652                 }
653         } else {
654                 if (ctrl.wLength) {
655                         if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) {
656                                 free_page((unsigned long)tbuf);
657                                 return -EFAULT;
658                         }
659                 }
660                 snoop(&dev->dev, "control write: bRequest=%02x "
661                                 "bRrequestType=%02x wValue=%04x "
662                                 "wIndex=%04x wLength=%04x\n",
663                         ctrl.bRequest, ctrl.bRequestType, ctrl.wValue,
664                                 ctrl.wIndex, ctrl.wLength);
665                 if (usbfs_snoop) {
666                         dev_info(&dev->dev, "control write: data: ");
667                         for (j = 0; j < ctrl.wLength; ++j)
668                                 printk("%02x ", (unsigned char)(tbuf)[j]);
669                         printk("\n");
670                 }
671                 usb_unlock_device(dev);
672                 i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType,
673                                        ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo);
674                 usb_lock_device(dev);
675         }
676         free_page((unsigned long)tbuf);
677         if (i<0 && i != -EPIPE) {
678                 dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL "
679                            "failed cmd %s rqt %u rq %u len %u ret %d\n",
680                            current->comm, ctrl.bRequestType, ctrl.bRequest,
681                            ctrl.wLength, i);
682         }
683         return i;
684 }
685
686 static int proc_bulk(struct dev_state *ps, void __user *arg)
687 {
688         struct usb_device *dev = ps->dev;
689         struct usbdevfs_bulktransfer bulk;
690         unsigned int tmo, len1, pipe;
691         int len2;
692         unsigned char *tbuf;
693         int i, j, ret;
694
695         if (copy_from_user(&bulk, arg, sizeof(bulk)))
696                 return -EFAULT;
697         if ((ret = findintfep(ps->dev, bulk.ep)) < 0)
698                 return ret;
699         if ((ret = checkintf(ps, ret)))
700                 return ret;
701         if (bulk.ep & USB_DIR_IN)
702                 pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f);
703         else
704                 pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f);
705         if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN)))
706                 return -EINVAL;
707         len1 = bulk.len;
708         if (len1 > MAX_USBFS_BUFFER_SIZE)
709                 return -EINVAL;
710         if (!(tbuf = kmalloc(len1, GFP_KERNEL)))
711                 return -ENOMEM;
712         tmo = bulk.timeout;
713         if (bulk.ep & 0x80) {
714                 if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) {
715                         kfree(tbuf);
716                         return -EINVAL;
717                 }
718                 snoop(&dev->dev, "bulk read: len=0x%02x timeout=%04d\n",
719                         bulk.len, bulk.timeout);
720                 usb_unlock_device(dev);
721                 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
722                 usb_lock_device(dev);
723                 if (!i && len2) {
724                         if (usbfs_snoop) {
725                                 dev_info(&dev->dev, "bulk read: data ");
726                                 for (j = 0; j < len2; ++j)
727                                         printk("%02x ", (unsigned char)(tbuf)[j]);
728                                 printk("\n");
729                         }
730                         if (copy_to_user(bulk.data, tbuf, len2)) {
731                                 kfree(tbuf);
732                                 return -EFAULT;
733                         }
734                 }
735         } else {
736                 if (len1) {
737                         if (copy_from_user(tbuf, bulk.data, len1)) {
738                                 kfree(tbuf);
739                                 return -EFAULT;
740                         }
741                 }
742                 snoop(&dev->dev, "bulk write: len=0x%02x timeout=%04d\n",
743                         bulk.len, bulk.timeout);
744                 if (usbfs_snoop) {
745                         dev_info(&dev->dev, "bulk write: data: ");
746                         for (j = 0; j < len1; ++j)
747                                 printk("%02x ", (unsigned char)(tbuf)[j]);
748                         printk("\n");
749                 }
750                 usb_unlock_device(dev);
751                 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo);
752                 usb_lock_device(dev);
753         }
754         kfree(tbuf);
755         if (i < 0)
756                 return i;
757         return len2;
758 }
759
760 static int proc_resetep(struct dev_state *ps, void __user *arg)
761 {
762         unsigned int ep;
763         int ret;
764
765         if (get_user(ep, (unsigned int __user *)arg))
766                 return -EFAULT;
767         if ((ret = findintfep(ps->dev, ep)) < 0)
768                 return ret;
769         if ((ret = checkintf(ps, ret)))
770                 return ret;
771         usb_settoggle(ps->dev, ep & 0xf, !(ep & USB_DIR_IN), 0);
772         return 0;
773 }
774
775 static int proc_clearhalt(struct dev_state *ps, void __user *arg)
776 {
777         unsigned int ep;
778         int pipe;
779         int ret;
780
781         if (get_user(ep, (unsigned int __user *)arg))
782                 return -EFAULT;
783         if ((ret = findintfep(ps->dev, ep)) < 0)
784                 return ret;
785         if ((ret = checkintf(ps, ret)))
786                 return ret;
787         if (ep & USB_DIR_IN)
788                 pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f);
789         else
790                 pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f);
791
792         return usb_clear_halt(ps->dev, pipe);
793 }
794                 
795
796 static int proc_getdriver(struct dev_state *ps, void __user *arg)
797 {
798         struct usbdevfs_getdriver gd;
799         struct usb_interface *intf;
800         int ret;
801
802         if (copy_from_user(&gd, arg, sizeof(gd)))
803                 return -EFAULT;
804         down_read(&usb_bus_type.subsys.rwsem);
805         intf = usb_ifnum_to_if(ps->dev, gd.interface);
806         if (!intf || !intf->dev.driver)
807                 ret = -ENODATA;
808         else {
809                 strncpy(gd.driver, intf->dev.driver->name,
810                                 sizeof(gd.driver));
811                 ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0);
812         }
813         up_read(&usb_bus_type.subsys.rwsem);
814         return ret;
815 }
816
817 static int proc_connectinfo(struct dev_state *ps, void __user *arg)
818 {
819         struct usbdevfs_connectinfo ci;
820
821         ci.devnum = ps->dev->devnum;
822         ci.slow = ps->dev->speed == USB_SPEED_LOW;
823         if (copy_to_user(arg, &ci, sizeof(ci)))
824                 return -EFAULT;
825         return 0;
826 }
827
828 static int proc_resetdevice(struct dev_state *ps)
829 {
830         return usb_reset_device(ps->dev);
831
832 }
833
834 static int proc_setintf(struct dev_state *ps, void __user *arg)
835 {
836         struct usbdevfs_setinterface setintf;
837         int ret;
838
839         if (copy_from_user(&setintf, arg, sizeof(setintf)))
840                 return -EFAULT;
841         if ((ret = checkintf(ps, setintf.interface)))
842                 return ret;
843         return usb_set_interface(ps->dev, setintf.interface,
844                         setintf.altsetting);
845 }
846
847 static int proc_setconfig(struct dev_state *ps, void __user *arg)
848 {
849         unsigned int u;
850         int status = 0;
851         struct usb_host_config *actconfig;
852
853         if (get_user(u, (unsigned int __user *)arg))
854                 return -EFAULT;
855
856         actconfig = ps->dev->actconfig;
857  
858         /* Don't touch the device if any interfaces are claimed.
859          * It could interfere with other drivers' operations, and if
860          * an interface is claimed by usbfs it could easily deadlock.
861          */
862         if (actconfig) {
863                 int i;
864  
865                 for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) {
866                         if (usb_interface_claimed(actconfig->interface[i])) {
867                                 dev_warn (&ps->dev->dev,
868                                         "usbfs: interface %d claimed by %s "
869                                         "while '%s' sets config #%d\n",
870                                         actconfig->interface[i]
871                                                 ->cur_altsetting
872                                                 ->desc.bInterfaceNumber,
873                                         actconfig->interface[i]
874                                                 ->dev.driver->name,
875                                         current->comm, u);
876                                 status = -EBUSY;
877                                 break;
878                         }
879                 }
880         }
881
882         /* SET_CONFIGURATION is often abused as a "cheap" driver reset,
883          * so avoid usb_set_configuration()'s kick to sysfs
884          */
885         if (status == 0) {
886                 if (actconfig && actconfig->desc.bConfigurationValue == u)
887                         status = usb_reset_configuration(ps->dev);
888                 else
889                         status = usb_set_configuration(ps->dev, u);
890         }
891
892         return status;
893 }
894
895 static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
896                              struct usbdevfs_iso_packet_desc __user *iso_frame_desc,
897                              void __user *arg)
898 {
899         struct usbdevfs_iso_packet_desc *isopkt = NULL;
900         struct usb_host_endpoint *ep;
901         struct async *as;
902         struct usb_ctrlrequest *dr = NULL;
903         unsigned int u, totlen, isofrmlen;
904         int ret, interval = 0, ifnum = -1;
905
906         if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP|USBDEVFS_URB_SHORT_NOT_OK|
907                            URB_NO_FSBR|URB_ZERO_PACKET))
908                 return -EINVAL;
909         if (!uurb->buffer)
910                 return -EINVAL;
911         if (uurb->signr != 0 && (uurb->signr < SIGRTMIN || uurb->signr > SIGRTMAX))
912                 return -EINVAL;
913         if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL && (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) {
914                 if ((ifnum = findintfep(ps->dev, uurb->endpoint)) < 0)
915                         return ifnum;
916                 if ((ret = checkintf(ps, ifnum)))
917                         return ret;
918         }
919         if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0)
920                 ep = ps->dev->ep_in [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
921         else
922                 ep = ps->dev->ep_out [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK];
923         if (!ep)
924                 return -ENOENT;
925         switch(uurb->type) {
926         case USBDEVFS_URB_TYPE_CONTROL:
927                 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
928                                 != USB_ENDPOINT_XFER_CONTROL)
929                         return -EINVAL;
930                 /* min 8 byte setup packet, max arbitrary */
931                 if (uurb->buffer_length < 8 || uurb->buffer_length > PAGE_SIZE)
932                         return -EINVAL;
933                 if (!(dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL)))
934                         return -ENOMEM;
935                 if (copy_from_user(dr, uurb->buffer, 8)) {
936                         kfree(dr);
937                         return -EFAULT;
938                 }
939                 if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) {
940                         kfree(dr);
941                         return -EINVAL;
942                 }
943                 if ((ret = check_ctrlrecip(ps, dr->bRequestType, le16_to_cpup(&dr->wIndex)))) {
944                         kfree(dr);
945                         return ret;
946                 }
947                 uurb->endpoint = (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) | (dr->bRequestType & USB_ENDPOINT_DIR_MASK);
948                 uurb->number_of_packets = 0;
949                 uurb->buffer_length = le16_to_cpup(&dr->wLength);
950                 uurb->buffer += 8;
951                 if (!access_ok((uurb->endpoint & USB_DIR_IN) ?  VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) {
952                         kfree(dr);
953                         return -EFAULT;
954                 }
955                 snoop(&ps->dev->dev, "control urb\n");
956                 break;
957
958         case USBDEVFS_URB_TYPE_BULK:
959                 switch (ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
960                 case USB_ENDPOINT_XFER_CONTROL:
961                 case USB_ENDPOINT_XFER_ISOC:
962                         return -EINVAL;
963                 /* allow single-shot interrupt transfers, at bogus rates */
964                 }
965                 uurb->number_of_packets = 0;
966                 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE)
967                         return -EINVAL;
968                 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length))
969                         return -EFAULT;
970                 snoop(&ps->dev->dev, "bulk urb\n");
971                 break;
972
973         case USBDEVFS_URB_TYPE_ISO:
974                 /* arbitrary limit */
975                 if (uurb->number_of_packets < 1 || uurb->number_of_packets > 128)
976                         return -EINVAL;
977                 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
978                                 != USB_ENDPOINT_XFER_ISOC)
979                         return -EINVAL;
980                 interval = 1 << min (15, ep->desc.bInterval - 1);
981                 isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * uurb->number_of_packets;
982                 if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL)))
983                         return -ENOMEM;
984                 if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) {
985                         kfree(isopkt);
986                         return -EFAULT;
987                 }
988                 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
989                         if (isopkt[u].length > 1023) {
990                                 kfree(isopkt);
991                                 return -EINVAL;
992                         }
993                         totlen += isopkt[u].length;
994                 }
995                 if (totlen > 32768) {
996                         kfree(isopkt);
997                         return -EINVAL;
998                 }
999                 uurb->buffer_length = totlen;
1000                 snoop(&ps->dev->dev, "iso urb\n");
1001                 break;
1002
1003         case USBDEVFS_URB_TYPE_INTERRUPT:
1004                 uurb->number_of_packets = 0;
1005                 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
1006                                 != USB_ENDPOINT_XFER_INT)
1007                         return -EINVAL;
1008                 if (ps->dev->speed == USB_SPEED_HIGH)
1009                         interval = 1 << min (15, ep->desc.bInterval - 1);
1010                 else
1011                         interval = ep->desc.bInterval;
1012                 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE)
1013                         return -EINVAL;
1014                 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length))
1015                         return -EFAULT;
1016                 snoop(&ps->dev->dev, "interrupt urb\n");
1017                 break;
1018
1019         default:
1020                 return -EINVAL;
1021         }
1022         if (!(as = alloc_async(uurb->number_of_packets))) {
1023                 kfree(isopkt);
1024                 kfree(dr);
1025                 return -ENOMEM;
1026         }
1027         if (!(as->urb->transfer_buffer = kmalloc(uurb->buffer_length, GFP_KERNEL))) {
1028                 kfree(isopkt);
1029                 kfree(dr);
1030                 free_async(as);
1031                 return -ENOMEM;
1032         }
1033         as->urb->dev = ps->dev;
1034         as->urb->pipe = (uurb->type << 30) | __create_pipe(ps->dev, uurb->endpoint & 0xf) | (uurb->endpoint & USB_DIR_IN);
1035         as->urb->transfer_flags = uurb->flags;
1036         as->urb->transfer_buffer_length = uurb->buffer_length;
1037         as->urb->setup_packet = (unsigned char*)dr;
1038         as->urb->start_frame = uurb->start_frame;
1039         as->urb->number_of_packets = uurb->number_of_packets;
1040         as->urb->interval = interval;
1041         as->urb->context = as;
1042         as->urb->complete = async_completed;
1043         for (totlen = u = 0; u < uurb->number_of_packets; u++) {
1044                 as->urb->iso_frame_desc[u].offset = totlen;
1045                 as->urb->iso_frame_desc[u].length = isopkt[u].length;
1046                 totlen += isopkt[u].length;
1047         }
1048         kfree(isopkt);
1049         as->ps = ps;
1050         as->userurb = arg;
1051         if (uurb->endpoint & USB_DIR_IN)
1052                 as->userbuffer = uurb->buffer;
1053         else
1054                 as->userbuffer = NULL;
1055         as->signr = uurb->signr;
1056         as->ifnum = ifnum;
1057         as->pid = current->pid;
1058         as->uid = current->uid;
1059         as->euid = current->euid;
1060         if (!(uurb->endpoint & USB_DIR_IN)) {
1061                 if (copy_from_user(as->urb->transfer_buffer, uurb->buffer, as->urb->transfer_buffer_length)) {
1062                         free_async(as);
1063                         return -EFAULT;
1064                 }
1065         }
1066         snoop(&as->urb->dev->dev, "submit urb\n");
1067         snoop_urb(as->urb, as->userurb);
1068         async_newpending(as);
1069         if ((ret = usb_submit_urb(as->urb, GFP_KERNEL))) {
1070                 dev_printk(KERN_DEBUG, &ps->dev->dev, "usbfs: usb_submit_urb returned %d\n", ret);
1071                 async_removepending(as);
1072                 free_async(as);
1073                 return ret;
1074         }
1075         return 0;
1076 }
1077
1078 static int proc_submiturb(struct dev_state *ps, void __user *arg)
1079 {
1080         struct usbdevfs_urb uurb;
1081
1082         if (copy_from_user(&uurb, arg, sizeof(uurb)))
1083                 return -EFAULT;
1084
1085         return proc_do_submiturb(ps, &uurb, (((struct usbdevfs_urb __user *)arg)->iso_frame_desc), arg);
1086 }
1087
1088 static int proc_unlinkurb(struct dev_state *ps, void __user *arg)
1089 {
1090         struct async *as;
1091
1092         as = async_getpending(ps, arg);
1093         if (!as)
1094                 return -EINVAL;
1095         usb_kill_urb(as->urb);
1096         return 0;
1097 }
1098
1099 static int processcompl(struct async *as, void __user * __user *arg)
1100 {
1101         struct urb *urb = as->urb;
1102         struct usbdevfs_urb __user *userurb = as->userurb;
1103         void __user *addr = as->userurb;
1104         unsigned int i;
1105
1106         if (as->userbuffer)
1107                 if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length))
1108                         return -EFAULT;
1109         if (put_user(urb->status, &userurb->status))
1110                 return -EFAULT;
1111         if (put_user(urb->actual_length, &userurb->actual_length))
1112                 return -EFAULT;
1113         if (put_user(urb->error_count, &userurb->error_count))
1114                 return -EFAULT;
1115
1116         if (usb_pipeisoc(urb->pipe)) {
1117                 for (i = 0; i < urb->number_of_packets; i++) {
1118                         if (put_user(urb->iso_frame_desc[i].actual_length,
1119                                      &userurb->iso_frame_desc[i].actual_length))
1120                                 return -EFAULT;
1121                         if (put_user(urb->iso_frame_desc[i].status,
1122                                      &userurb->iso_frame_desc[i].status))
1123                                 return -EFAULT;
1124                 }
1125         }
1126
1127         free_async(as);
1128
1129         if (put_user(addr, (void __user * __user *)arg))
1130                 return -EFAULT;
1131         return 0;
1132 }
1133
1134 static struct async* reap_as(struct dev_state *ps)
1135 {
1136         DECLARE_WAITQUEUE(wait, current);
1137         struct async *as = NULL;
1138         struct usb_device *dev = ps->dev;
1139
1140         add_wait_queue(&ps->wait, &wait);
1141         for (;;) {
1142                 __set_current_state(TASK_INTERRUPTIBLE);
1143                 if ((as = async_getcompleted(ps)))
1144                         break;
1145                 if (signal_pending(current))
1146                         break;
1147                 usb_unlock_device(dev);
1148                 schedule();
1149                 usb_lock_device(dev);
1150         }
1151         remove_wait_queue(&ps->wait, &wait);
1152         set_current_state(TASK_RUNNING);
1153         return as;
1154 }
1155
1156 static int proc_reapurb(struct dev_state *ps, void __user *arg)
1157 {
1158         struct async *as = reap_as(ps);
1159         if (as)
1160                 return processcompl(as, (void __user * __user *)arg);
1161         if (signal_pending(current))
1162                 return -EINTR;
1163         return -EIO;
1164 }
1165
1166 static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg)
1167 {
1168         struct async *as;
1169
1170         if (!(as = async_getcompleted(ps)))
1171                 return -EAGAIN;
1172         return processcompl(as, (void __user * __user *)arg);
1173 }
1174
1175 #ifdef CONFIG_COMPAT
1176
1177 static int get_urb32(struct usbdevfs_urb *kurb,
1178                      struct usbdevfs_urb32 __user *uurb)
1179 {
1180         __u32  uptr;
1181         if (get_user(kurb->type, &uurb->type) ||
1182             __get_user(kurb->endpoint, &uurb->endpoint) ||
1183             __get_user(kurb->status, &uurb->status) ||
1184             __get_user(kurb->flags, &uurb->flags) ||
1185             __get_user(kurb->buffer_length, &uurb->buffer_length) ||
1186             __get_user(kurb->actual_length, &uurb->actual_length) ||
1187             __get_user(kurb->start_frame, &uurb->start_frame) ||
1188             __get_user(kurb->number_of_packets, &uurb->number_of_packets) ||
1189             __get_user(kurb->error_count, &uurb->error_count) ||
1190             __get_user(kurb->signr, &uurb->signr))
1191                 return -EFAULT;
1192
1193         if (__get_user(uptr, &uurb->buffer))
1194                 return -EFAULT;
1195         kurb->buffer = compat_ptr(uptr);
1196         if (__get_user(uptr, &uurb->buffer))
1197                 return -EFAULT;
1198         kurb->usercontext = compat_ptr(uptr);
1199
1200         return 0;
1201 }
1202
1203 static int proc_submiturb_compat(struct dev_state *ps, void __user *arg)
1204 {
1205         struct usbdevfs_urb uurb;
1206
1207         if (get_urb32(&uurb,(struct usbdevfs_urb32 *)arg))
1208                 return -EFAULT;
1209
1210         return proc_do_submiturb(ps, &uurb, ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc, arg);
1211 }
1212
1213 static int processcompl_compat(struct async *as, void __user * __user *arg)
1214 {
1215         struct urb *urb = as->urb;
1216         struct usbdevfs_urb32 __user *userurb = as->userurb;
1217         void __user *addr = as->userurb;
1218         unsigned int i;
1219
1220         if (as->userbuffer)
1221                 if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length))
1222                         return -EFAULT;
1223         if (put_user(urb->status, &userurb->status))
1224                 return -EFAULT;
1225         if (put_user(urb->actual_length, &userurb->actual_length))
1226                 return -EFAULT;
1227         if (put_user(urb->error_count, &userurb->error_count))
1228                 return -EFAULT;
1229
1230         if (usb_pipeisoc(urb->pipe)) {
1231                 for (i = 0; i < urb->number_of_packets; i++) {
1232                         if (put_user(urb->iso_frame_desc[i].actual_length,
1233                                      &userurb->iso_frame_desc[i].actual_length))
1234                                 return -EFAULT;
1235                         if (put_user(urb->iso_frame_desc[i].status,
1236                                      &userurb->iso_frame_desc[i].status))
1237                                 return -EFAULT;
1238                 }
1239         }
1240
1241         free_async(as);
1242         if (put_user((u32)(u64)addr, (u32 __user *)arg))
1243                 return -EFAULT;
1244         return 0;
1245 }
1246
1247 static int proc_reapurb_compat(struct dev_state *ps, void __user *arg)
1248 {
1249         struct async *as = reap_as(ps);
1250         if (as)
1251                 return processcompl_compat(as, (void __user * __user *)arg);
1252         if (signal_pending(current))
1253                 return -EINTR;
1254         return -EIO;
1255 }
1256
1257 static int proc_reapurbnonblock_compat(struct dev_state *ps, void __user *arg)
1258 {
1259         struct async *as;
1260
1261         if (!(as = async_getcompleted(ps)))
1262                 return -EAGAIN;
1263         return processcompl_compat(as, (void __user * __user *)arg);
1264 }
1265
1266 #endif
1267
1268 static int proc_disconnectsignal(struct dev_state *ps, void __user *arg)
1269 {
1270         struct usbdevfs_disconnectsignal ds;
1271
1272         if (copy_from_user(&ds, arg, sizeof(ds)))
1273                 return -EFAULT;
1274         if (ds.signr != 0 && (ds.signr < SIGRTMIN || ds.signr > SIGRTMAX))
1275                 return -EINVAL;
1276         ps->discsignr = ds.signr;
1277         ps->disccontext = ds.context;
1278         return 0;
1279 }
1280
1281 static int proc_claiminterface(struct dev_state *ps, void __user *arg)
1282 {
1283         unsigned int ifnum;
1284
1285         if (get_user(ifnum, (unsigned int __user *)arg))
1286                 return -EFAULT;
1287         return claimintf(ps, ifnum);
1288 }
1289
1290 static int proc_releaseinterface(struct dev_state *ps, void __user *arg)
1291 {
1292         unsigned int ifnum;
1293         int ret;
1294
1295         if (get_user(ifnum, (unsigned int __user *)arg))
1296                 return -EFAULT;
1297         if ((ret = releaseintf(ps, ifnum)) < 0)
1298                 return ret;
1299         destroy_async_on_interface (ps, ifnum);
1300         return 0;
1301 }
1302
1303 static int proc_ioctl(struct dev_state *ps, struct usbdevfs_ioctl *ctl)
1304 {
1305         int                     size;
1306         void                    *buf = NULL;
1307         int                     retval = 0;
1308         struct usb_interface    *intf = NULL;
1309         struct usb_driver       *driver = NULL;
1310
1311         /* alloc buffer */
1312         if ((size = _IOC_SIZE (ctl->ioctl_code)) > 0) {
1313                 if ((buf = kmalloc (size, GFP_KERNEL)) == NULL)
1314                         return -ENOMEM;
1315                 if ((_IOC_DIR(ctl->ioctl_code) & _IOC_WRITE)) {
1316                         if (copy_from_user (buf, ctl->data, size)) {
1317                                 kfree(buf);
1318                                 return -EFAULT;
1319                         }
1320                 } else {
1321                         memset (buf, 0, size);
1322                 }
1323         }
1324
1325         if (!connected(ps->dev)) {
1326                 kfree(buf);
1327                 return -ENODEV;
1328         }
1329
1330         if (ps->dev->state != USB_STATE_CONFIGURED)
1331                 retval = -EHOSTUNREACH;
1332         else if (!(intf = usb_ifnum_to_if (ps->dev, ctl->ifno)))
1333                retval = -EINVAL;
1334         else switch (ctl->ioctl_code) {
1335
1336         /* disconnect kernel driver from interface */
1337         case USBDEVFS_DISCONNECT:
1338
1339                 down_write(&usb_bus_type.subsys.rwsem);
1340                 if (intf->dev.driver) {
1341                         driver = to_usb_driver(intf->dev.driver);
1342                         dev_dbg (&intf->dev, "disconnect by usbfs\n");
1343                         usb_driver_release_interface(driver, intf);
1344                 } else
1345                         retval = -ENODATA;
1346                 up_write(&usb_bus_type.subsys.rwsem);
1347                 break;
1348
1349         /* let kernel drivers try to (re)bind to the interface */
1350         case USBDEVFS_CONNECT:
1351                 usb_unlock_device(ps->dev);
1352                 usb_lock_all_devices();
1353                 bus_rescan_devices(intf->dev.bus);
1354                 usb_unlock_all_devices();
1355                 usb_lock_device(ps->dev);
1356                 break;
1357
1358         /* talk directly to the interface's driver */
1359         default:
1360                 down_read(&usb_bus_type.subsys.rwsem);
1361                 if (intf->dev.driver)
1362                         driver = to_usb_driver(intf->dev.driver);
1363                 if (driver == NULL || driver->ioctl == NULL) {
1364                         retval = -ENOTTY;
1365                 } else {
1366                         retval = driver->ioctl (intf, ctl->ioctl_code, buf);
1367                         if (retval == -ENOIOCTLCMD)
1368                                 retval = -ENOTTY;
1369                 }
1370                 up_read(&usb_bus_type.subsys.rwsem);
1371         }
1372
1373         /* cleanup and return */
1374         if (retval >= 0
1375                         && (_IOC_DIR (ctl->ioctl_code) & _IOC_READ) != 0
1376                         && size > 0
1377                         && copy_to_user (ctl->data, buf, size) != 0)
1378                 retval = -EFAULT;
1379
1380         kfree(buf);
1381         return retval;
1382 }
1383
1384 static int proc_ioctl_default(struct dev_state *ps, void __user *arg)
1385 {
1386         struct usbdevfs_ioctl   ctrl;
1387
1388         if (copy_from_user(&ctrl, arg, sizeof (ctrl)))
1389                 return -EFAULT;
1390         return proc_ioctl(ps, &ctrl);
1391 }
1392
1393 #ifdef CONFIG_COMPAT
1394 static int proc_ioctl_compat(struct dev_state *ps, compat_uptr_t arg)
1395 {
1396         struct usbdevfs_ioctl32 __user *uioc;
1397         struct usbdevfs_ioctl ctrl;
1398         u32 udata;
1399
1400         uioc = compat_ptr((long)arg);
1401         if (get_user(ctrl.ifno, &uioc->ifno) ||
1402             get_user(ctrl.ioctl_code, &uioc->ioctl_code) ||
1403             __get_user(udata, &uioc->data))
1404                 return -EFAULT;
1405         ctrl.data = compat_ptr(udata);
1406
1407         return proc_ioctl(ps, &ctrl);
1408 }
1409 #endif
1410
1411 /*
1412  * NOTE:  All requests here that have interface numbers as parameters
1413  * are assuming that somehow the configuration has been prevented from
1414  * changing.  But there's no mechanism to ensure that...
1415  */
1416 static int usbdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
1417 {
1418         struct dev_state *ps = (struct dev_state *)file->private_data;
1419         struct usb_device *dev = ps->dev;
1420         void __user *p = (void __user *)arg;
1421         int ret = -ENOTTY;
1422
1423         if (!(file->f_mode & FMODE_WRITE))
1424                 return -EPERM;
1425         usb_lock_device(dev);
1426         if (!connected(dev)) {
1427                 usb_unlock_device(dev);
1428                 return -ENODEV;
1429         }
1430
1431         switch (cmd) {
1432         case USBDEVFS_CONTROL:
1433                 snoop(&dev->dev, "%s: CONTROL\n", __FUNCTION__);
1434                 ret = proc_control(ps, p);
1435                 if (ret >= 0)
1436                         inode->i_mtime = CURRENT_TIME;
1437                 break;
1438
1439         case USBDEVFS_BULK:
1440                 snoop(&dev->dev, "%s: BULK\n", __FUNCTION__);
1441                 ret = proc_bulk(ps, p);
1442                 if (ret >= 0)
1443                         inode->i_mtime = CURRENT_TIME;
1444                 break;
1445
1446         case USBDEVFS_RESETEP:
1447                 snoop(&dev->dev, "%s: RESETEP\n", __FUNCTION__);
1448                 ret = proc_resetep(ps, p);
1449                 if (ret >= 0)
1450                         inode->i_mtime = CURRENT_TIME;
1451                 break;
1452
1453         case USBDEVFS_RESET:
1454                 snoop(&dev->dev, "%s: RESET\n", __FUNCTION__);
1455                 ret = proc_resetdevice(ps);
1456                 break;
1457
1458         case USBDEVFS_CLEAR_HALT:
1459                 snoop(&dev->dev, "%s: CLEAR_HALT\n", __FUNCTION__);
1460                 ret = proc_clearhalt(ps, p);
1461                 if (ret >= 0)
1462                         inode->i_mtime = CURRENT_TIME;
1463                 break;
1464
1465         case USBDEVFS_GETDRIVER:
1466                 snoop(&dev->dev, "%s: GETDRIVER\n", __FUNCTION__);
1467                 ret = proc_getdriver(ps, p);
1468                 break;
1469
1470         case USBDEVFS_CONNECTINFO:
1471                 snoop(&dev->dev, "%s: CONNECTINFO\n", __FUNCTION__);
1472                 ret = proc_connectinfo(ps, p);
1473                 break;
1474
1475         case USBDEVFS_SETINTERFACE:
1476                 snoop(&dev->dev, "%s: SETINTERFACE\n", __FUNCTION__);
1477                 ret = proc_setintf(ps, p);
1478                 break;
1479
1480         case USBDEVFS_SETCONFIGURATION:
1481                 snoop(&dev->dev, "%s: SETCONFIGURATION\n", __FUNCTION__);
1482                 ret = proc_setconfig(ps, p);
1483                 break;
1484
1485         case USBDEVFS_SUBMITURB:
1486                 snoop(&dev->dev, "%s: SUBMITURB\n", __FUNCTION__);
1487                 ret = proc_submiturb(ps, p);
1488                 if (ret >= 0)
1489                         inode->i_mtime = CURRENT_TIME;
1490                 break;
1491
1492 #ifdef CONFIG_COMPAT
1493
1494         case USBDEVFS_SUBMITURB32:
1495                 snoop(&dev->dev, "%s: SUBMITURB32\n", __FUNCTION__);
1496                 ret = proc_submiturb_compat(ps, p);
1497                 if (ret >= 0)
1498                         inode->i_mtime = CURRENT_TIME;
1499                 break;
1500
1501         case USBDEVFS_REAPURB32:
1502                 snoop(&dev->dev, "%s: REAPURB32\n", __FUNCTION__);
1503                 ret = proc_reapurb_compat(ps, p);
1504                 break;
1505
1506         case USBDEVFS_REAPURBNDELAY32:
1507                 snoop(&dev->dev, "%s: REAPURBDELAY32\n", __FUNCTION__);
1508                 ret = proc_reapurbnonblock_compat(ps, p);
1509                 break;
1510
1511         case USBDEVFS_IOCTL32:
1512                 snoop(&dev->dev, "%s: IOCTL\n", __FUNCTION__);
1513                 ret = proc_ioctl_compat(ps, (compat_uptr_t)(long)p);
1514                 break;
1515 #endif
1516
1517         case USBDEVFS_DISCARDURB:
1518                 snoop(&dev->dev, "%s: DISCARDURB\n", __FUNCTION__);
1519                 ret = proc_unlinkurb(ps, p);
1520                 break;
1521
1522         case USBDEVFS_REAPURB:
1523                 snoop(&dev->dev, "%s: REAPURB\n", __FUNCTION__);
1524                 ret = proc_reapurb(ps, p);
1525                 break;
1526
1527         case USBDEVFS_REAPURBNDELAY:
1528                 snoop(&dev->dev, "%s: REAPURBDELAY\n", __FUNCTION__);
1529                 ret = proc_reapurbnonblock(ps, p);
1530                 break;
1531
1532         case USBDEVFS_DISCSIGNAL:
1533                 snoop(&dev->dev, "%s: DISCSIGNAL\n", __FUNCTION__);
1534                 ret = proc_disconnectsignal(ps, p);
1535                 break;
1536
1537         case USBDEVFS_CLAIMINTERFACE:
1538                 snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __FUNCTION__);
1539                 ret = proc_claiminterface(ps, p);
1540                 break;
1541
1542         case USBDEVFS_RELEASEINTERFACE:
1543                 snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __FUNCTION__);
1544                 ret = proc_releaseinterface(ps, p);
1545                 break;
1546
1547         case USBDEVFS_IOCTL:
1548                 snoop(&dev->dev, "%s: IOCTL\n", __FUNCTION__);
1549                 ret = proc_ioctl_default(ps, p);
1550                 break;
1551         }
1552         usb_unlock_device(dev);
1553         if (ret >= 0)
1554                 inode->i_atime = CURRENT_TIME;
1555         return ret;
1556 }
1557
1558 /* No kernel lock - fine */
1559 static unsigned int usbdev_poll(struct file *file, struct poll_table_struct *wait)
1560 {
1561         struct dev_state *ps = (struct dev_state *)file->private_data;
1562         unsigned int mask = 0;
1563
1564         poll_wait(file, &ps->wait, wait);
1565         if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed))
1566                 mask |= POLLOUT | POLLWRNORM;
1567         if (!connected(ps->dev))
1568                 mask |= POLLERR | POLLHUP;
1569         return mask;
1570 }
1571
1572 struct file_operations usbfs_device_file_operations = {
1573         .llseek =       usbdev_lseek,
1574         .read =         usbdev_read,
1575         .poll =         usbdev_poll,
1576         .ioctl =        usbdev_ioctl,
1577         .open =         usbdev_open,
1578         .release =      usbdev_release,
1579 };
1580
1581 static void usbdev_add(struct usb_device *dev)
1582 {
1583         int minor = ((dev->bus->busnum-1) * 128) + (dev->devnum-1);
1584
1585         dev->class_dev = class_device_create(usb_device_class, NULL,
1586                                 MKDEV(USB_DEVICE_MAJOR, minor), &dev->dev,
1587                                 "usbdev%d.%d", dev->bus->busnum, dev->devnum);
1588
1589         dev->class_dev->class_data = dev;
1590 }
1591
1592 static void usbdev_remove(struct usb_device *dev)
1593 {
1594         class_device_unregister(dev->class_dev);
1595 }
1596
1597 static int usbdev_notify(struct notifier_block *self, unsigned long action,
1598                          void *dev)
1599 {
1600         switch (action) {
1601         case USB_DEVICE_ADD:
1602                 usbdev_add(dev);
1603                 break;
1604         case USB_DEVICE_REMOVE:
1605                 usbdev_remove(dev);
1606                 break;
1607         }
1608         return NOTIFY_OK;
1609 }
1610
1611 static struct notifier_block usbdev_nb = {
1612         .notifier_call =        usbdev_notify,
1613 };
1614
1615 static struct cdev usb_device_cdev = {
1616         .kobj   = {.name = "usb_device", },
1617         .owner  = THIS_MODULE,
1618 };
1619
1620 int __init usbdev_init(void)
1621 {
1622         int retval;
1623
1624         retval = register_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX,
1625                         "usb_device");
1626         if (retval) {
1627                 err("unable to register minors for usb_device");
1628                 goto out;
1629         }
1630         cdev_init(&usb_device_cdev, &usbfs_device_file_operations);
1631         retval = cdev_add(&usb_device_cdev, USB_DEVICE_DEV, USB_DEVICE_MAX);
1632         if (retval) {
1633                 err("unable to get usb_device major %d", USB_DEVICE_MAJOR);
1634                 goto error_cdev;
1635         }
1636         usb_device_class = class_create(THIS_MODULE, "usb_device");
1637         if (IS_ERR(usb_device_class)) {
1638                 err("unable to register usb_device class");
1639                 retval = PTR_ERR(usb_device_class);
1640                 goto error_class;
1641         }
1642
1643         usb_register_notify(&usbdev_nb);
1644
1645 out:
1646         return retval;
1647
1648 error_class:
1649         usb_device_class = NULL;
1650         cdev_del(&usb_device_cdev);
1651
1652 error_cdev:
1653         unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
1654         goto out;
1655 }
1656
1657 void usbdev_cleanup(void)
1658 {
1659         usb_unregister_notify(&usbdev_nb);
1660         class_destroy(usb_device_class);
1661         cdev_del(&usb_device_cdev);
1662         unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX);
1663 }
1664