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 */ 34 35 /*****************************************************************************/ 36 37 #include <linux/fs.h> 38 #include <linux/mm.h> 39 #include <linux/slab.h> 40 #include <linux/smp_lock.h> 41 #include <linux/signal.h> 42 #include <linux/poll.h> 43 #include <linux/module.h> 44 #include <linux/usb.h> 45 #include <linux/usbdevice_fs.h> 46 #include <asm/uaccess.h> 47 #include <asm/byteorder.h> 48 #include <linux/moduleparam.h> 49 50 #include "hcd.h" /* for usbcore internals */ 51 #include "usb.h" 52 53 struct async { 54 struct list_head asynclist; 55 struct dev_state *ps; 56 struct task_struct *task; 57 unsigned int signr; 58 unsigned int ifnum; 59 void __user *userbuffer; 60 void __user *userurb; 61 struct urb *urb; 62 }; 63 64 static int usbfs_snoop = 0; 65 module_param (usbfs_snoop, bool, S_IRUGO | S_IWUSR); 66 MODULE_PARM_DESC (usbfs_snoop, "true to log all usbfs traffic"); 67 68 #define snoop(dev, format, arg...) \ 69 do { \ 70 if (usbfs_snoop) \ 71 dev_info( dev , format , ## arg); \ 72 } while (0) 73 74 75 #define MAX_USBFS_BUFFER_SIZE 16384 76 77 static inline int connected (struct usb_device *dev) 78 { 79 return dev->state != USB_STATE_NOTATTACHED; 80 } 81 82 static loff_t usbdev_lseek(struct file *file, loff_t offset, int orig) 83 { 84 loff_t ret; 85 86 lock_kernel(); 87 88 switch (orig) { 89 case 0: 90 file->f_pos = offset; 91 ret = file->f_pos; 92 break; 93 case 1: 94 file->f_pos += offset; 95 ret = file->f_pos; 96 break; 97 case 2: 98 default: 99 ret = -EINVAL; 100 } 101 102 unlock_kernel(); 103 return ret; 104 } 105 106 static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos) 107 { 108 struct dev_state *ps = (struct dev_state *)file->private_data; 109 struct usb_device *dev = ps->dev; 110 ssize_t ret = 0; 111 unsigned len; 112 loff_t pos; 113 int i; 114 115 pos = *ppos; 116 usb_lock_device(dev); 117 if (!connected(dev)) { 118 ret = -ENODEV; 119 goto err; 120 } else if (pos < 0) { 121 ret = -EINVAL; 122 goto err; 123 } 124 125 if (pos < sizeof(struct usb_device_descriptor)) { 126 struct usb_device_descriptor *desc = kmalloc(sizeof(*desc), GFP_KERNEL); 127 if (!desc) { 128 ret = -ENOMEM; 129 goto err; 130 } 131 memcpy(desc, &dev->descriptor, sizeof(dev->descriptor)); 132 le16_to_cpus(&desc->bcdUSB); 133 le16_to_cpus(&desc->idVendor); 134 le16_to_cpus(&desc->idProduct); 135 le16_to_cpus(&desc->bcdDevice); 136 137 len = sizeof(struct usb_device_descriptor) - pos; 138 if (len > nbytes) 139 len = nbytes; 140 if (copy_to_user(buf, ((char *)desc) + pos, len)) { 141 kfree(desc); 142 ret = -EFAULT; 143 goto err; 144 } 145 kfree(desc); 146 147 *ppos += len; 148 buf += len; 149 nbytes -= len; 150 ret += len; 151 } 152 153 pos = sizeof(struct usb_device_descriptor); 154 for (i = 0; nbytes && i < dev->descriptor.bNumConfigurations; i++) { 155 struct usb_config_descriptor *config = 156 (struct usb_config_descriptor *)dev->rawdescriptors[i]; 157 unsigned int length = le16_to_cpu(config->wTotalLength); 158 159 if (*ppos < pos + length) { 160 161 /* The descriptor may claim to be longer than it 162 * really is. Here is the actual allocated length. */ 163 unsigned alloclen = 164 le16_to_cpu(dev->config[i].desc.wTotalLength); 165 166 len = length - (*ppos - pos); 167 if (len > nbytes) 168 len = nbytes; 169 170 /* Simply don't write (skip over) unallocated parts */ 171 if (alloclen > (*ppos - pos)) { 172 alloclen -= (*ppos - pos); 173 if (copy_to_user(buf, 174 dev->rawdescriptors[i] + (*ppos - pos), 175 min(len, alloclen))) { 176 ret = -EFAULT; 177 goto err; 178 } 179 } 180 181 *ppos += len; 182 buf += len; 183 nbytes -= len; 184 ret += len; 185 } 186 187 pos += length; 188 } 189 190 err: 191 usb_unlock_device(dev); 192 return ret; 193 } 194 195 /* 196 * async list handling 197 */ 198 199 static struct async *alloc_async(unsigned int numisoframes) 200 { 201 unsigned int assize = sizeof(struct async) + numisoframes * sizeof(struct usb_iso_packet_descriptor); 202 struct async *as = kmalloc(assize, GFP_KERNEL); 203 if (!as) 204 return NULL; 205 memset(as, 0, assize); 206 as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL); 207 if (!as->urb) { 208 kfree(as); 209 return NULL; 210 } 211 return as; 212 } 213 214 static void free_async(struct async *as) 215 { 216 if (as->urb->transfer_buffer) 217 kfree(as->urb->transfer_buffer); 218 if (as->urb->setup_packet) 219 kfree(as->urb->setup_packet); 220 usb_free_urb(as->urb); 221 kfree(as); 222 } 223 224 static inline void async_newpending(struct async *as) 225 { 226 struct dev_state *ps = as->ps; 227 unsigned long flags; 228 229 spin_lock_irqsave(&ps->lock, flags); 230 list_add_tail(&as->asynclist, &ps->async_pending); 231 spin_unlock_irqrestore(&ps->lock, flags); 232 } 233 234 static inline void async_removepending(struct async *as) 235 { 236 struct dev_state *ps = as->ps; 237 unsigned long flags; 238 239 spin_lock_irqsave(&ps->lock, flags); 240 list_del_init(&as->asynclist); 241 spin_unlock_irqrestore(&ps->lock, flags); 242 } 243 244 static inline struct async *async_getcompleted(struct dev_state *ps) 245 { 246 unsigned long flags; 247 struct async *as = NULL; 248 249 spin_lock_irqsave(&ps->lock, flags); 250 if (!list_empty(&ps->async_completed)) { 251 as = list_entry(ps->async_completed.next, struct async, asynclist); 252 list_del_init(&as->asynclist); 253 } 254 spin_unlock_irqrestore(&ps->lock, flags); 255 return as; 256 } 257 258 static inline struct async *async_getpending(struct dev_state *ps, void __user *userurb) 259 { 260 unsigned long flags; 261 struct async *as; 262 263 spin_lock_irqsave(&ps->lock, flags); 264 list_for_each_entry(as, &ps->async_pending, asynclist) 265 if (as->userurb == userurb) { 266 list_del_init(&as->asynclist); 267 spin_unlock_irqrestore(&ps->lock, flags); 268 return as; 269 } 270 spin_unlock_irqrestore(&ps->lock, flags); 271 return NULL; 272 } 273 274 static void async_completed(struct urb *urb, struct pt_regs *regs) 275 { 276 struct async *as = (struct async *)urb->context; 277 struct dev_state *ps = as->ps; 278 struct siginfo sinfo; 279 280 spin_lock(&ps->lock); 281 list_move_tail(&as->asynclist, &ps->async_completed); 282 spin_unlock(&ps->lock); 283 if (as->signr) { 284 sinfo.si_signo = as->signr; 285 sinfo.si_errno = as->urb->status; 286 sinfo.si_code = SI_ASYNCIO; 287 sinfo.si_addr = as->userurb; 288 send_sig_info(as->signr, &sinfo, as->task); 289 } 290 wake_up(&ps->wait); 291 } 292 293 static void destroy_async (struct dev_state *ps, struct list_head *list) 294 { 295 struct async *as; 296 unsigned long flags; 297 298 spin_lock_irqsave(&ps->lock, flags); 299 while (!list_empty(list)) { 300 as = list_entry(list->next, struct async, asynclist); 301 list_del_init(&as->asynclist); 302 303 /* drop the spinlock so the completion handler can run */ 304 spin_unlock_irqrestore(&ps->lock, flags); 305 usb_kill_urb(as->urb); 306 spin_lock_irqsave(&ps->lock, flags); 307 } 308 spin_unlock_irqrestore(&ps->lock, flags); 309 as = async_getcompleted(ps); 310 while (as) { 311 free_async(as); 312 as = async_getcompleted(ps); 313 } 314 } 315 316 static void destroy_async_on_interface (struct dev_state *ps, unsigned int ifnum) 317 { 318 struct list_head *p, *q, hitlist; 319 unsigned long flags; 320 321 INIT_LIST_HEAD(&hitlist); 322 spin_lock_irqsave(&ps->lock, flags); 323 list_for_each_safe(p, q, &ps->async_pending) 324 if (ifnum == list_entry(p, struct async, asynclist)->ifnum) 325 list_move_tail(p, &hitlist); 326 spin_unlock_irqrestore(&ps->lock, flags); 327 destroy_async(ps, &hitlist); 328 } 329 330 static inline void destroy_all_async(struct dev_state *ps) 331 { 332 destroy_async(ps, &ps->async_pending); 333 } 334 335 /* 336 * interface claims are made only at the request of user level code, 337 * which can also release them (explicitly or by closing files). 338 * they're also undone when devices disconnect. 339 */ 340 341 static int driver_probe (struct usb_interface *intf, 342 const struct usb_device_id *id) 343 { 344 return -ENODEV; 345 } 346 347 static void driver_disconnect(struct usb_interface *intf) 348 { 349 struct dev_state *ps = usb_get_intfdata (intf); 350 unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber; 351 352 if (!ps) 353 return; 354 355 /* NOTE: this relies on usbcore having canceled and completed 356 * all pending I/O requests; 2.6 does that. 357 */ 358 359 if (likely(ifnum < 8*sizeof(ps->ifclaimed))) 360 clear_bit(ifnum, &ps->ifclaimed); 361 else 362 warn("interface number %u out of range", ifnum); 363 364 usb_set_intfdata (intf, NULL); 365 366 /* force async requests to complete */ 367 destroy_async_on_interface(ps, ifnum); 368 } 369 370 struct usb_driver usbfs_driver = { 371 .owner = THIS_MODULE, 372 .name = "usbfs", 373 .probe = driver_probe, 374 .disconnect = driver_disconnect, 375 }; 376 377 static int claimintf(struct dev_state *ps, unsigned int ifnum) 378 { 379 struct usb_device *dev = ps->dev; 380 struct usb_interface *intf; 381 int err; 382 383 if (ifnum >= 8*sizeof(ps->ifclaimed)) 384 return -EINVAL; 385 /* already claimed */ 386 if (test_bit(ifnum, &ps->ifclaimed)) 387 return 0; 388 389 /* lock against other changes to driver bindings */ 390 down_write(&usb_bus_type.subsys.rwsem); 391 intf = usb_ifnum_to_if(dev, ifnum); 392 if (!intf) 393 err = -ENOENT; 394 else 395 err = usb_driver_claim_interface(&usbfs_driver, intf, ps); 396 up_write(&usb_bus_type.subsys.rwsem); 397 if (err == 0) 398 set_bit(ifnum, &ps->ifclaimed); 399 return err; 400 } 401 402 static int releaseintf(struct dev_state *ps, unsigned int ifnum) 403 { 404 struct usb_device *dev; 405 struct usb_interface *intf; 406 int err; 407 408 err = -EINVAL; 409 if (ifnum >= 8*sizeof(ps->ifclaimed)) 410 return err; 411 dev = ps->dev; 412 /* lock against other changes to driver bindings */ 413 down_write(&usb_bus_type.subsys.rwsem); 414 intf = usb_ifnum_to_if(dev, ifnum); 415 if (!intf) 416 err = -ENOENT; 417 else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) { 418 usb_driver_release_interface(&usbfs_driver, intf); 419 err = 0; 420 } 421 up_write(&usb_bus_type.subsys.rwsem); 422 return err; 423 } 424 425 static int checkintf(struct dev_state *ps, unsigned int ifnum) 426 { 427 if (ps->dev->state != USB_STATE_CONFIGURED) 428 return -EHOSTUNREACH; 429 if (ifnum >= 8*sizeof(ps->ifclaimed)) 430 return -EINVAL; 431 if (test_bit(ifnum, &ps->ifclaimed)) 432 return 0; 433 /* if not yet claimed, claim it for the driver */ 434 dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim interface %u before use\n", 435 current->pid, current->comm, ifnum); 436 return claimintf(ps, ifnum); 437 } 438 439 static int findintfep(struct usb_device *dev, unsigned int ep) 440 { 441 unsigned int i, j, e; 442 struct usb_interface *intf; 443 struct usb_host_interface *alts; 444 struct usb_endpoint_descriptor *endpt; 445 446 if (ep & ~(USB_DIR_IN|0xf)) 447 return -EINVAL; 448 if (!dev->actconfig) 449 return -ESRCH; 450 for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) { 451 intf = dev->actconfig->interface[i]; 452 for (j = 0; j < intf->num_altsetting; j++) { 453 alts = &intf->altsetting[j]; 454 for (e = 0; e < alts->desc.bNumEndpoints; e++) { 455 endpt = &alts->endpoint[e].desc; 456 if (endpt->bEndpointAddress == ep) 457 return alts->desc.bInterfaceNumber; 458 } 459 } 460 } 461 return -ENOENT; 462 } 463 464 static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype, unsigned int index) 465 { 466 int ret = 0; 467 468 if (ps->dev->state != USB_STATE_CONFIGURED) 469 return -EHOSTUNREACH; 470 if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype)) 471 return 0; 472 473 index &= 0xff; 474 switch (requesttype & USB_RECIP_MASK) { 475 case USB_RECIP_ENDPOINT: 476 if ((ret = findintfep(ps->dev, index)) >= 0) 477 ret = checkintf(ps, ret); 478 break; 479 480 case USB_RECIP_INTERFACE: 481 ret = checkintf(ps, index); 482 break; 483 } 484 return ret; 485 } 486 487 /* 488 * file operations 489 */ 490 static int usbdev_open(struct inode *inode, struct file *file) 491 { 492 struct usb_device *dev; 493 struct dev_state *ps; 494 int ret; 495 496 /* 497 * no locking necessary here, as chrdev_open has the kernel lock 498 * (still acquire the kernel lock for safety) 499 */ 500 ret = -ENOMEM; 501 if (!(ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL))) 502 goto out_nolock; 503 504 lock_kernel(); 505 ret = -ENOENT; 506 dev = usb_get_dev(inode->u.generic_ip); 507 if (!dev) { 508 kfree(ps); 509 goto out; 510 } 511 ret = 0; 512 ps->dev = dev; 513 ps->file = file; 514 spin_lock_init(&ps->lock); 515 INIT_LIST_HEAD(&ps->async_pending); 516 INIT_LIST_HEAD(&ps->async_completed); 517 init_waitqueue_head(&ps->wait); 518 ps->discsignr = 0; 519 ps->disctask = current; 520 ps->disccontext = NULL; 521 ps->ifclaimed = 0; 522 wmb(); 523 list_add_tail(&ps->list, &dev->filelist); 524 file->private_data = ps; 525 out: 526 unlock_kernel(); 527 out_nolock: 528 return ret; 529 } 530 531 static int usbdev_release(struct inode *inode, struct file *file) 532 { 533 struct dev_state *ps = (struct dev_state *)file->private_data; 534 struct usb_device *dev = ps->dev; 535 unsigned int ifnum; 536 537 usb_lock_device(dev); 538 list_del_init(&ps->list); 539 for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed); 540 ifnum++) { 541 if (test_bit(ifnum, &ps->ifclaimed)) 542 releaseintf(ps, ifnum); 543 } 544 destroy_all_async(ps); 545 usb_unlock_device(dev); 546 usb_put_dev(dev); 547 ps->dev = NULL; 548 kfree(ps); 549 return 0; 550 } 551 552 static int proc_control(struct dev_state *ps, void __user *arg) 553 { 554 struct usb_device *dev = ps->dev; 555 struct usbdevfs_ctrltransfer ctrl; 556 unsigned int tmo; 557 unsigned char *tbuf; 558 int i, j, ret; 559 560 if (copy_from_user(&ctrl, arg, sizeof(ctrl))) 561 return -EFAULT; 562 if ((ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.wIndex))) 563 return ret; 564 if (ctrl.wLength > PAGE_SIZE) 565 return -EINVAL; 566 if (!(tbuf = (unsigned char *)__get_free_page(GFP_KERNEL))) 567 return -ENOMEM; 568 tmo = ctrl.timeout; 569 if (ctrl.bRequestType & 0x80) { 570 if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data, ctrl.wLength)) { 571 free_page((unsigned long)tbuf); 572 return -EINVAL; 573 } 574 snoop(&dev->dev, "control read: bRequest=%02x bRrequestType=%02x wValue=%04x wIndex=%04x\n", 575 ctrl.bRequest, ctrl.bRequestType, ctrl.wValue, ctrl.wIndex); 576 577 usb_unlock_device(dev); 578 i = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType, 579 ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo); 580 usb_lock_device(dev); 581 if ((i > 0) && ctrl.wLength) { 582 if (usbfs_snoop) { 583 dev_info(&dev->dev, "control read: data "); 584 for (j = 0; j < ctrl.wLength; ++j) 585 printk ("%02x ", (unsigned char)(tbuf)[j]); 586 printk("\n"); 587 } 588 if (copy_to_user(ctrl.data, tbuf, ctrl.wLength)) { 589 free_page((unsigned long)tbuf); 590 return -EFAULT; 591 } 592 } 593 } else { 594 if (ctrl.wLength) { 595 if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) { 596 free_page((unsigned long)tbuf); 597 return -EFAULT; 598 } 599 } 600 snoop(&dev->dev, "control write: bRequest=%02x bRrequestType=%02x wValue=%04x wIndex=%04x\n", 601 ctrl.bRequest, ctrl.bRequestType, ctrl.wValue, ctrl.wIndex); 602 if (usbfs_snoop) { 603 dev_info(&dev->dev, "control write: data: "); 604 for (j = 0; j < ctrl.wLength; ++j) 605 printk ("%02x ", (unsigned char)(tbuf)[j]); 606 printk("\n"); 607 } 608 usb_unlock_device(dev); 609 i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType, 610 ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo); 611 usb_lock_device(dev); 612 } 613 free_page((unsigned long)tbuf); 614 if (i<0 && i != -EPIPE) { 615 dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL " 616 "failed cmd %s rqt %u rq %u len %u ret %d\n", 617 current->comm, ctrl.bRequestType, ctrl.bRequest, 618 ctrl.wLength, i); 619 } 620 return i; 621 } 622 623 static int proc_bulk(struct dev_state *ps, void __user *arg) 624 { 625 struct usb_device *dev = ps->dev; 626 struct usbdevfs_bulktransfer bulk; 627 unsigned int tmo, len1, pipe; 628 int len2; 629 unsigned char *tbuf; 630 int i, ret; 631 632 if (copy_from_user(&bulk, arg, sizeof(bulk))) 633 return -EFAULT; 634 if ((ret = findintfep(ps->dev, bulk.ep)) < 0) 635 return ret; 636 if ((ret = checkintf(ps, ret))) 637 return ret; 638 if (bulk.ep & USB_DIR_IN) 639 pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f); 640 else 641 pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f); 642 if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN))) 643 return -EINVAL; 644 len1 = bulk.len; 645 if (len1 > MAX_USBFS_BUFFER_SIZE) 646 return -EINVAL; 647 if (!(tbuf = kmalloc(len1, GFP_KERNEL))) 648 return -ENOMEM; 649 tmo = bulk.timeout; 650 if (bulk.ep & 0x80) { 651 if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) { 652 kfree(tbuf); 653 return -EINVAL; 654 } 655 usb_unlock_device(dev); 656 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo); 657 usb_lock_device(dev); 658 if (!i && len2) { 659 if (copy_to_user(bulk.data, tbuf, len2)) { 660 kfree(tbuf); 661 return -EFAULT; 662 } 663 } 664 } else { 665 if (len1) { 666 if (copy_from_user(tbuf, bulk.data, len1)) { 667 kfree(tbuf); 668 return -EFAULT; 669 } 670 } 671 usb_unlock_device(dev); 672 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo); 673 usb_lock_device(dev); 674 } 675 kfree(tbuf); 676 if (i < 0) 677 return i; 678 return len2; 679 } 680 681 static int proc_resetep(struct dev_state *ps, void __user *arg) 682 { 683 unsigned int ep; 684 int ret; 685 686 if (get_user(ep, (unsigned int __user *)arg)) 687 return -EFAULT; 688 if ((ret = findintfep(ps->dev, ep)) < 0) 689 return ret; 690 if ((ret = checkintf(ps, ret))) 691 return ret; 692 usb_settoggle(ps->dev, ep & 0xf, !(ep & USB_DIR_IN), 0); 693 return 0; 694 } 695 696 static int proc_clearhalt(struct dev_state *ps, void __user *arg) 697 { 698 unsigned int ep; 699 int pipe; 700 int ret; 701 702 if (get_user(ep, (unsigned int __user *)arg)) 703 return -EFAULT; 704 if ((ret = findintfep(ps->dev, ep)) < 0) 705 return ret; 706 if ((ret = checkintf(ps, ret))) 707 return ret; 708 if (ep & USB_DIR_IN) 709 pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f); 710 else 711 pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f); 712 713 return usb_clear_halt(ps->dev, pipe); 714 } 715 716 717 static int proc_getdriver(struct dev_state *ps, void __user *arg) 718 { 719 struct usbdevfs_getdriver gd; 720 struct usb_interface *intf; 721 int ret; 722 723 if (copy_from_user(&gd, arg, sizeof(gd))) 724 return -EFAULT; 725 down_read(&usb_bus_type.subsys.rwsem); 726 intf = usb_ifnum_to_if(ps->dev, gd.interface); 727 if (!intf || !intf->dev.driver) 728 ret = -ENODATA; 729 else { 730 strncpy(gd.driver, intf->dev.driver->name, 731 sizeof(gd.driver)); 732 ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0); 733 } 734 up_read(&usb_bus_type.subsys.rwsem); 735 return ret; 736 } 737 738 static int proc_connectinfo(struct dev_state *ps, void __user *arg) 739 { 740 struct usbdevfs_connectinfo ci; 741 742 ci.devnum = ps->dev->devnum; 743 ci.slow = ps->dev->speed == USB_SPEED_LOW; 744 if (copy_to_user(arg, &ci, sizeof(ci))) 745 return -EFAULT; 746 return 0; 747 } 748 749 static int proc_resetdevice(struct dev_state *ps) 750 { 751 return usb_reset_device(ps->dev); 752 753 } 754 755 static int proc_setintf(struct dev_state *ps, void __user *arg) 756 { 757 struct usbdevfs_setinterface setintf; 758 int ret; 759 760 if (copy_from_user(&setintf, arg, sizeof(setintf))) 761 return -EFAULT; 762 if ((ret = checkintf(ps, setintf.interface))) 763 return ret; 764 return usb_set_interface(ps->dev, setintf.interface, 765 setintf.altsetting); 766 } 767 768 static int proc_setconfig(struct dev_state *ps, void __user *arg) 769 { 770 unsigned int u; 771 int status = 0; 772 struct usb_host_config *actconfig; 773 774 if (get_user(u, (unsigned int __user *)arg)) 775 return -EFAULT; 776 777 actconfig = ps->dev->actconfig; 778 779 /* Don't touch the device if any interfaces are claimed. 780 * It could interfere with other drivers' operations, and if 781 * an interface is claimed by usbfs it could easily deadlock. 782 */ 783 if (actconfig) { 784 int i; 785 786 for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) { 787 if (usb_interface_claimed(actconfig->interface[i])) { 788 dev_warn (&ps->dev->dev, 789 "usbfs: interface %d claimed " 790 "while '%s' sets config #%d\n", 791 actconfig->interface[i] 792 ->cur_altsetting 793 ->desc.bInterfaceNumber, 794 current->comm, u); 795 #if 0 /* FIXME: enable in 2.6.10 or so */ 796 status = -EBUSY; 797 break; 798 #endif 799 } 800 } 801 } 802 803 /* SET_CONFIGURATION is often abused as a "cheap" driver reset, 804 * so avoid usb_set_configuration()'s kick to sysfs 805 */ 806 if (status == 0) { 807 if (actconfig && actconfig->desc.bConfigurationValue == u) 808 status = usb_reset_configuration(ps->dev); 809 else 810 status = usb_set_configuration(ps->dev, u); 811 } 812 813 return status; 814 } 815 816 817 static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb, 818 struct usbdevfs_iso_packet_desc __user *iso_frame_desc, 819 void __user *arg) 820 { 821 struct usbdevfs_iso_packet_desc *isopkt = NULL; 822 struct usb_host_endpoint *ep; 823 struct async *as; 824 struct usb_ctrlrequest *dr = NULL; 825 unsigned int u, totlen, isofrmlen; 826 int ret, interval = 0, ifnum = -1; 827 828 if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP|USBDEVFS_URB_SHORT_NOT_OK| 829 URB_NO_FSBR|URB_ZERO_PACKET)) 830 return -EINVAL; 831 if (!uurb->buffer) 832 return -EINVAL; 833 if (uurb->signr != 0 && (uurb->signr < SIGRTMIN || uurb->signr > SIGRTMAX)) 834 return -EINVAL; 835 if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL && (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) { 836 if ((ifnum = findintfep(ps->dev, uurb->endpoint)) < 0) 837 return ifnum; 838 if ((ret = checkintf(ps, ifnum))) 839 return ret; 840 } 841 if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0) 842 ep = ps->dev->ep_in [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK]; 843 else 844 ep = ps->dev->ep_out [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK]; 845 if (!ep) 846 return -ENOENT; 847 switch(uurb->type) { 848 case USBDEVFS_URB_TYPE_CONTROL: 849 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) 850 != USB_ENDPOINT_XFER_CONTROL) 851 return -EINVAL; 852 /* min 8 byte setup packet, max arbitrary */ 853 if (uurb->buffer_length < 8 || uurb->buffer_length > PAGE_SIZE) 854 return -EINVAL; 855 if (!(dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL))) 856 return -ENOMEM; 857 if (copy_from_user(dr, uurb->buffer, 8)) { 858 kfree(dr); 859 return -EFAULT; 860 } 861 if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) { 862 kfree(dr); 863 return -EINVAL; 864 } 865 if ((ret = check_ctrlrecip(ps, dr->bRequestType, le16_to_cpup(&dr->wIndex)))) { 866 kfree(dr); 867 return ret; 868 } 869 uurb->endpoint = (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) | (dr->bRequestType & USB_ENDPOINT_DIR_MASK); 870 uurb->number_of_packets = 0; 871 uurb->buffer_length = le16_to_cpup(&dr->wLength); 872 uurb->buffer += 8; 873 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) { 874 kfree(dr); 875 return -EFAULT; 876 } 877 break; 878 879 case USBDEVFS_URB_TYPE_BULK: 880 switch (ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) { 881 case USB_ENDPOINT_XFER_CONTROL: 882 case USB_ENDPOINT_XFER_ISOC: 883 return -EINVAL; 884 /* allow single-shot interrupt transfers, at bogus rates */ 885 } 886 uurb->number_of_packets = 0; 887 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE) 888 return -EINVAL; 889 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) 890 return -EFAULT; 891 break; 892 893 case USBDEVFS_URB_TYPE_ISO: 894 /* arbitrary limit */ 895 if (uurb->number_of_packets < 1 || uurb->number_of_packets > 128) 896 return -EINVAL; 897 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) 898 != USB_ENDPOINT_XFER_ISOC) 899 return -EINVAL; 900 interval = 1 << min (15, ep->desc.bInterval - 1); 901 isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * uurb->number_of_packets; 902 if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL))) 903 return -ENOMEM; 904 if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) { 905 kfree(isopkt); 906 return -EFAULT; 907 } 908 for (totlen = u = 0; u < uurb->number_of_packets; u++) { 909 if (isopkt[u].length > 1023) { 910 kfree(isopkt); 911 return -EINVAL; 912 } 913 totlen += isopkt[u].length; 914 } 915 if (totlen > 32768) { 916 kfree(isopkt); 917 return -EINVAL; 918 } 919 uurb->buffer_length = totlen; 920 break; 921 922 case USBDEVFS_URB_TYPE_INTERRUPT: 923 uurb->number_of_packets = 0; 924 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) 925 != USB_ENDPOINT_XFER_INT) 926 return -EINVAL; 927 if (ps->dev->speed == USB_SPEED_HIGH) 928 interval = 1 << min (15, ep->desc.bInterval - 1); 929 else 930 interval = ep->desc.bInterval; 931 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE) 932 return -EINVAL; 933 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) 934 return -EFAULT; 935 break; 936 937 default: 938 return -EINVAL; 939 } 940 if (!(as = alloc_async(uurb->number_of_packets))) { 941 if (isopkt) 942 kfree(isopkt); 943 if (dr) 944 kfree(dr); 945 return -ENOMEM; 946 } 947 if (!(as->urb->transfer_buffer = kmalloc(uurb->buffer_length, GFP_KERNEL))) { 948 if (isopkt) 949 kfree(isopkt); 950 if (dr) 951 kfree(dr); 952 free_async(as); 953 return -ENOMEM; 954 } 955 as->urb->dev = ps->dev; 956 as->urb->pipe = (uurb->type << 30) | __create_pipe(ps->dev, uurb->endpoint & 0xf) | (uurb->endpoint & USB_DIR_IN); 957 as->urb->transfer_flags = uurb->flags; 958 as->urb->transfer_buffer_length = uurb->buffer_length; 959 as->urb->setup_packet = (unsigned char*)dr; 960 as->urb->start_frame = uurb->start_frame; 961 as->urb->number_of_packets = uurb->number_of_packets; 962 as->urb->interval = interval; 963 as->urb->context = as; 964 as->urb->complete = async_completed; 965 for (totlen = u = 0; u < uurb->number_of_packets; u++) { 966 as->urb->iso_frame_desc[u].offset = totlen; 967 as->urb->iso_frame_desc[u].length = isopkt[u].length; 968 totlen += isopkt[u].length; 969 } 970 if (isopkt) 971 kfree(isopkt); 972 as->ps = ps; 973 as->userurb = arg; 974 if (uurb->endpoint & USB_DIR_IN) 975 as->userbuffer = uurb->buffer; 976 else 977 as->userbuffer = NULL; 978 as->signr = uurb->signr; 979 as->ifnum = ifnum; 980 as->task = current; 981 if (!(uurb->endpoint & USB_DIR_IN)) { 982 if (copy_from_user(as->urb->transfer_buffer, uurb->buffer, as->urb->transfer_buffer_length)) { 983 free_async(as); 984 return -EFAULT; 985 } 986 } 987 async_newpending(as); 988 if ((ret = usb_submit_urb(as->urb, GFP_KERNEL))) { 989 dev_printk(KERN_DEBUG, &ps->dev->dev, "usbfs: usb_submit_urb returned %d\n", ret); 990 async_removepending(as); 991 free_async(as); 992 return ret; 993 } 994 return 0; 995 } 996 997 static int proc_submiturb(struct dev_state *ps, void __user *arg) 998 { 999 struct usbdevfs_urb uurb; 1000 1001 if (copy_from_user(&uurb, arg, sizeof(uurb))) 1002 return -EFAULT; 1003 1004 return proc_do_submiturb(ps, &uurb, (((struct usbdevfs_urb __user *)arg)->iso_frame_desc), arg); 1005 } 1006 1007 static int proc_unlinkurb(struct dev_state *ps, void __user *arg) 1008 { 1009 struct async *as; 1010 1011 as = async_getpending(ps, arg); 1012 if (!as) 1013 return -EINVAL; 1014 usb_kill_urb(as->urb); 1015 return 0; 1016 } 1017 1018 static int processcompl(struct async *as, void __user * __user *arg) 1019 { 1020 struct urb *urb = as->urb; 1021 struct usbdevfs_urb __user *userurb = as->userurb; 1022 void __user *addr = as->userurb; 1023 unsigned int i; 1024 1025 if (as->userbuffer) 1026 if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length)) 1027 return -EFAULT; 1028 if (put_user(urb->status, &userurb->status)) 1029 return -EFAULT; 1030 if (put_user(urb->actual_length, &userurb->actual_length)) 1031 return -EFAULT; 1032 if (put_user(urb->error_count, &userurb->error_count)) 1033 return -EFAULT; 1034 1035 if (!(usb_pipeisoc(urb->pipe))) 1036 return 0; 1037 for (i = 0; i < urb->number_of_packets; i++) { 1038 if (put_user(urb->iso_frame_desc[i].actual_length, 1039 &userurb->iso_frame_desc[i].actual_length)) 1040 return -EFAULT; 1041 if (put_user(urb->iso_frame_desc[i].status, 1042 &userurb->iso_frame_desc[i].status)) 1043 return -EFAULT; 1044 } 1045 1046 free_async(as); 1047 1048 if (put_user(addr, (void __user * __user *)arg)) 1049 return -EFAULT; 1050 return 0; 1051 } 1052 1053 static struct async* reap_as(struct dev_state *ps) 1054 { 1055 DECLARE_WAITQUEUE(wait, current); 1056 struct async *as = NULL; 1057 struct usb_device *dev = ps->dev; 1058 1059 add_wait_queue(&ps->wait, &wait); 1060 for (;;) { 1061 __set_current_state(TASK_INTERRUPTIBLE); 1062 if ((as = async_getcompleted(ps))) 1063 break; 1064 if (signal_pending(current)) 1065 break; 1066 usb_unlock_device(dev); 1067 schedule(); 1068 usb_lock_device(dev); 1069 } 1070 remove_wait_queue(&ps->wait, &wait); 1071 set_current_state(TASK_RUNNING); 1072 return as; 1073 } 1074 1075 static int proc_reapurb(struct dev_state *ps, void __user *arg) 1076 { 1077 struct async *as = reap_as(ps); 1078 if (as) 1079 return processcompl(as, (void __user * __user *)arg); 1080 if (signal_pending(current)) 1081 return -EINTR; 1082 return -EIO; 1083 } 1084 1085 static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg) 1086 { 1087 struct async *as; 1088 1089 if (!(as = async_getcompleted(ps))) 1090 return -EAGAIN; 1091 return processcompl(as, (void __user * __user *)arg); 1092 } 1093 1094 #ifdef CONFIG_COMPAT 1095 1096 static int get_urb32(struct usbdevfs_urb *kurb, 1097 struct usbdevfs_urb32 __user *uurb) 1098 { 1099 __u32 uptr; 1100 if (get_user(kurb->type, &uurb->type) || 1101 __get_user(kurb->endpoint, &uurb->endpoint) || 1102 __get_user(kurb->status, &uurb->status) || 1103 __get_user(kurb->flags, &uurb->flags) || 1104 __get_user(kurb->buffer_length, &uurb->buffer_length) || 1105 __get_user(kurb->actual_length, &uurb->actual_length) || 1106 __get_user(kurb->start_frame, &uurb->start_frame) || 1107 __get_user(kurb->number_of_packets, &uurb->number_of_packets) || 1108 __get_user(kurb->error_count, &uurb->error_count) || 1109 __get_user(kurb->signr, &uurb->signr)) 1110 return -EFAULT; 1111 1112 if (__get_user(uptr, &uurb->buffer)) 1113 return -EFAULT; 1114 kurb->buffer = compat_ptr(uptr); 1115 if (__get_user(uptr, &uurb->buffer)) 1116 return -EFAULT; 1117 kurb->usercontext = compat_ptr(uptr); 1118 1119 return 0; 1120 } 1121 1122 static int proc_submiturb_compat(struct dev_state *ps, void __user *arg) 1123 { 1124 struct usbdevfs_urb uurb; 1125 1126 if (get_urb32(&uurb,(struct usbdevfs_urb32 *)arg)) 1127 return -EFAULT; 1128 1129 return proc_do_submiturb(ps, &uurb, ((struct usbdevfs_urb __user *)arg)->iso_frame_desc, arg); 1130 } 1131 1132 static int processcompl_compat(struct async *as, void __user * __user *arg) 1133 { 1134 struct urb *urb = as->urb; 1135 struct usbdevfs_urb32 __user *userurb = as->userurb; 1136 void __user *addr = as->userurb; 1137 unsigned int i; 1138 1139 if (as->userbuffer) 1140 if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length)) 1141 return -EFAULT; 1142 if (put_user(urb->status, &userurb->status)) 1143 return -EFAULT; 1144 if (put_user(urb->actual_length, &userurb->actual_length)) 1145 return -EFAULT; 1146 if (put_user(urb->error_count, &userurb->error_count)) 1147 return -EFAULT; 1148 1149 if (!(usb_pipeisoc(urb->pipe))) 1150 return 0; 1151 for (i = 0; i < urb->number_of_packets; i++) { 1152 if (put_user(urb->iso_frame_desc[i].actual_length, 1153 &userurb->iso_frame_desc[i].actual_length)) 1154 return -EFAULT; 1155 if (put_user(urb->iso_frame_desc[i].status, 1156 &userurb->iso_frame_desc[i].status)) 1157 return -EFAULT; 1158 } 1159 1160 free_async(as); 1161 if (put_user((u32)(u64)addr, (u32 __user *)arg)) 1162 return -EFAULT; 1163 return 0; 1164 } 1165 1166 static int proc_reapurb_compat(struct dev_state *ps, void __user *arg) 1167 { 1168 struct async *as = reap_as(ps); 1169 if (as) 1170 return processcompl_compat(as, (void __user * __user *)arg); 1171 if (signal_pending(current)) 1172 return -EINTR; 1173 return -EIO; 1174 } 1175 1176 static int proc_reapurbnonblock_compat(struct dev_state *ps, void __user *arg) 1177 { 1178 struct async *as; 1179 1180 printk("reapurbnblock\n"); 1181 if (!(as = async_getcompleted(ps))) 1182 return -EAGAIN; 1183 printk("reap got as %p\n", as); 1184 return processcompl_compat(as, (void __user * __user *)arg); 1185 } 1186 1187 #endif 1188 1189 static int proc_disconnectsignal(struct dev_state *ps, void __user *arg) 1190 { 1191 struct usbdevfs_disconnectsignal ds; 1192 1193 if (copy_from_user(&ds, arg, sizeof(ds))) 1194 return -EFAULT; 1195 if (ds.signr != 0 && (ds.signr < SIGRTMIN || ds.signr > SIGRTMAX)) 1196 return -EINVAL; 1197 ps->discsignr = ds.signr; 1198 ps->disccontext = ds.context; 1199 return 0; 1200 } 1201 1202 static int proc_claiminterface(struct dev_state *ps, void __user *arg) 1203 { 1204 unsigned int ifnum; 1205 1206 if (get_user(ifnum, (unsigned int __user *)arg)) 1207 return -EFAULT; 1208 return claimintf(ps, ifnum); 1209 } 1210 1211 static int proc_releaseinterface(struct dev_state *ps, void __user *arg) 1212 { 1213 unsigned int ifnum; 1214 int ret; 1215 1216 if (get_user(ifnum, (unsigned int __user *)arg)) 1217 return -EFAULT; 1218 if ((ret = releaseintf(ps, ifnum)) < 0) 1219 return ret; 1220 destroy_async_on_interface (ps, ifnum); 1221 return 0; 1222 } 1223 1224 static int proc_ioctl (struct dev_state *ps, void __user *arg) 1225 { 1226 struct usbdevfs_ioctl ctrl; 1227 int size; 1228 void *buf = NULL; 1229 int retval = 0; 1230 struct usb_interface *intf = NULL; 1231 struct usb_driver *driver = NULL; 1232 int i; 1233 1234 /* get input parameters and alloc buffer */ 1235 if (copy_from_user(&ctrl, arg, sizeof (ctrl))) 1236 return -EFAULT; 1237 if ((size = _IOC_SIZE (ctrl.ioctl_code)) > 0) { 1238 if ((buf = kmalloc (size, GFP_KERNEL)) == NULL) 1239 return -ENOMEM; 1240 if ((_IOC_DIR(ctrl.ioctl_code) & _IOC_WRITE)) { 1241 if (copy_from_user (buf, ctrl.data, size)) { 1242 kfree (buf); 1243 return -EFAULT; 1244 } 1245 } else { 1246 memset (buf, 0, size); 1247 } 1248 } 1249 1250 if (!connected(ps->dev)) { 1251 if (buf) 1252 kfree(buf); 1253 return -ENODEV; 1254 } 1255 1256 if (ps->dev->state != USB_STATE_CONFIGURED) 1257 retval = -EHOSTUNREACH; 1258 else if (!(intf = usb_ifnum_to_if (ps->dev, ctrl.ifno))) 1259 retval = -EINVAL; 1260 else switch (ctrl.ioctl_code) { 1261 1262 /* disconnect kernel driver from interface */ 1263 case USBDEVFS_DISCONNECT: 1264 1265 /* don't allow the user to unbind the hub driver from 1266 * a hub with children to manage */ 1267 for (i = 0; i < ps->dev->maxchild; ++i) { 1268 if (ps->dev->children[i]) 1269 retval = -EBUSY; 1270 } 1271 if (retval) 1272 break; 1273 1274 down_write(&usb_bus_type.subsys.rwsem); 1275 if (intf->dev.driver) { 1276 driver = to_usb_driver(intf->dev.driver); 1277 dev_dbg (&intf->dev, "disconnect by usbfs\n"); 1278 usb_driver_release_interface(driver, intf); 1279 } else 1280 retval = -ENODATA; 1281 up_write(&usb_bus_type.subsys.rwsem); 1282 break; 1283 1284 /* let kernel drivers try to (re)bind to the interface */ 1285 case USBDEVFS_CONNECT: 1286 usb_unlock_device(ps->dev); 1287 usb_lock_all_devices(); 1288 bus_rescan_devices(intf->dev.bus); 1289 usb_unlock_all_devices(); 1290 usb_lock_device(ps->dev); 1291 break; 1292 1293 /* talk directly to the interface's driver */ 1294 default: 1295 down_read(&usb_bus_type.subsys.rwsem); 1296 if (intf->dev.driver) 1297 driver = to_usb_driver(intf->dev.driver); 1298 if (driver == NULL || driver->ioctl == NULL) { 1299 retval = -ENOTTY; 1300 } else { 1301 retval = driver->ioctl (intf, ctrl.ioctl_code, buf); 1302 if (retval == -ENOIOCTLCMD) 1303 retval = -ENOTTY; 1304 } 1305 up_read(&usb_bus_type.subsys.rwsem); 1306 } 1307 1308 /* cleanup and return */ 1309 if (retval >= 0 1310 && (_IOC_DIR (ctrl.ioctl_code) & _IOC_READ) != 0 1311 && size > 0 1312 && copy_to_user (ctrl.data, buf, size) != 0) 1313 retval = -EFAULT; 1314 if (buf != NULL) 1315 kfree (buf); 1316 return retval; 1317 } 1318 1319 /* 1320 * NOTE: All requests here that have interface numbers as parameters 1321 * are assuming that somehow the configuration has been prevented from 1322 * changing. But there's no mechanism to ensure that... 1323 */ 1324 static int usbdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) 1325 { 1326 struct dev_state *ps = (struct dev_state *)file->private_data; 1327 struct usb_device *dev = ps->dev; 1328 void __user *p = (void __user *)arg; 1329 int ret = -ENOTTY; 1330 1331 if (!(file->f_mode & FMODE_WRITE)) 1332 return -EPERM; 1333 usb_lock_device(dev); 1334 if (!connected(dev)) { 1335 usb_unlock_device(dev); 1336 return -ENODEV; 1337 } 1338 1339 switch (cmd) { 1340 case USBDEVFS_CONTROL: 1341 snoop(&dev->dev, "%s: CONTROL\n", __FUNCTION__); 1342 ret = proc_control(ps, p); 1343 if (ret >= 0) 1344 inode->i_mtime = CURRENT_TIME; 1345 break; 1346 1347 case USBDEVFS_BULK: 1348 snoop(&dev->dev, "%s: BULK\n", __FUNCTION__); 1349 ret = proc_bulk(ps, p); 1350 if (ret >= 0) 1351 inode->i_mtime = CURRENT_TIME; 1352 break; 1353 1354 case USBDEVFS_RESETEP: 1355 snoop(&dev->dev, "%s: RESETEP\n", __FUNCTION__); 1356 ret = proc_resetep(ps, p); 1357 if (ret >= 0) 1358 inode->i_mtime = CURRENT_TIME; 1359 break; 1360 1361 case USBDEVFS_RESET: 1362 snoop(&dev->dev, "%s: RESET\n", __FUNCTION__); 1363 ret = proc_resetdevice(ps); 1364 break; 1365 1366 case USBDEVFS_CLEAR_HALT: 1367 snoop(&dev->dev, "%s: CLEAR_HALT\n", __FUNCTION__); 1368 ret = proc_clearhalt(ps, p); 1369 if (ret >= 0) 1370 inode->i_mtime = CURRENT_TIME; 1371 break; 1372 1373 case USBDEVFS_GETDRIVER: 1374 snoop(&dev->dev, "%s: GETDRIVER\n", __FUNCTION__); 1375 ret = proc_getdriver(ps, p); 1376 break; 1377 1378 case USBDEVFS_CONNECTINFO: 1379 snoop(&dev->dev, "%s: CONNECTINFO\n", __FUNCTION__); 1380 ret = proc_connectinfo(ps, p); 1381 break; 1382 1383 case USBDEVFS_SETINTERFACE: 1384 snoop(&dev->dev, "%s: SETINTERFACE\n", __FUNCTION__); 1385 ret = proc_setintf(ps, p); 1386 break; 1387 1388 case USBDEVFS_SETCONFIGURATION: 1389 snoop(&dev->dev, "%s: SETCONFIGURATION\n", __FUNCTION__); 1390 ret = proc_setconfig(ps, p); 1391 break; 1392 1393 case USBDEVFS_SUBMITURB: 1394 snoop(&dev->dev, "%s: SUBMITURB\n", __FUNCTION__); 1395 ret = proc_submiturb(ps, p); 1396 if (ret >= 0) 1397 inode->i_mtime = CURRENT_TIME; 1398 break; 1399 1400 #ifdef CONFIG_COMPAT 1401 1402 case USBDEVFS_SUBMITURB32: 1403 snoop(&dev->dev, "%s: SUBMITURB32\n", __FUNCTION__); 1404 ret = proc_submiturb_compat(ps, p); 1405 if (ret >= 0) 1406 inode->i_mtime = CURRENT_TIME; 1407 break; 1408 1409 case USBDEVFS_REAPURB32: 1410 snoop(&dev->dev, "%s: REAPURB32\n", __FUNCTION__); 1411 ret = proc_reapurb_compat(ps, p); 1412 break; 1413 1414 case USBDEVFS_REAPURBNDELAY32: 1415 snoop(&dev->dev, "%s: REAPURBDELAY32\n", __FUNCTION__); 1416 ret = proc_reapurbnonblock_compat(ps, p); 1417 break; 1418 1419 #endif 1420 1421 case USBDEVFS_DISCARDURB: 1422 snoop(&dev->dev, "%s: DISCARDURB\n", __FUNCTION__); 1423 ret = proc_unlinkurb(ps, p); 1424 break; 1425 1426 case USBDEVFS_REAPURB: 1427 snoop(&dev->dev, "%s: REAPURB\n", __FUNCTION__); 1428 ret = proc_reapurb(ps, p); 1429 break; 1430 1431 case USBDEVFS_REAPURBNDELAY: 1432 snoop(&dev->dev, "%s: REAPURBDELAY\n", __FUNCTION__); 1433 ret = proc_reapurbnonblock(ps, p); 1434 break; 1435 1436 case USBDEVFS_DISCSIGNAL: 1437 snoop(&dev->dev, "%s: DISCSIGNAL\n", __FUNCTION__); 1438 ret = proc_disconnectsignal(ps, p); 1439 break; 1440 1441 case USBDEVFS_CLAIMINTERFACE: 1442 snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __FUNCTION__); 1443 ret = proc_claiminterface(ps, p); 1444 break; 1445 1446 case USBDEVFS_RELEASEINTERFACE: 1447 snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __FUNCTION__); 1448 ret = proc_releaseinterface(ps, p); 1449 break; 1450 1451 case USBDEVFS_IOCTL: 1452 snoop(&dev->dev, "%s: IOCTL\n", __FUNCTION__); 1453 ret = proc_ioctl(ps, p); 1454 break; 1455 } 1456 usb_unlock_device(dev); 1457 if (ret >= 0) 1458 inode->i_atime = CURRENT_TIME; 1459 return ret; 1460 } 1461 1462 /* No kernel lock - fine */ 1463 static unsigned int usbdev_poll(struct file *file, struct poll_table_struct *wait) 1464 { 1465 struct dev_state *ps = (struct dev_state *)file->private_data; 1466 unsigned int mask = 0; 1467 1468 poll_wait(file, &ps->wait, wait); 1469 if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed)) 1470 mask |= POLLOUT | POLLWRNORM; 1471 if (!connected(ps->dev)) 1472 mask |= POLLERR | POLLHUP; 1473 return mask; 1474 } 1475 1476 struct file_operations usbfs_device_file_operations = { 1477 .llseek = usbdev_lseek, 1478 .read = usbdev_read, 1479 .poll = usbdev_poll, 1480 .ioctl = usbdev_ioctl, 1481 .open = usbdev_open, 1482 .release = usbdev_release, 1483 }; 1484