| 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 <linux/security.h> |
| 51 | #include <asm/uaccess.h> |
| 52 | #include <asm/byteorder.h> |
| 53 | #include <linux/moduleparam.h> |
| 54 | |
| 55 | #include "hcd.h" /* for usbcore internals */ |
| 56 | #include "usb.h" |
| 57 | |
| 58 | #define USB_MAXBUS 64 |
| 59 | #define USB_DEVICE_MAX USB_MAXBUS * 128 |
| 60 | static struct class *usb_device_class; |
| 61 | |
| 62 | /* Mutual exclusion for removal, open, and release */ |
| 63 | DEFINE_MUTEX(usbfs_mutex); |
| 64 | |
| 65 | struct async { |
| 66 | struct list_head asynclist; |
| 67 | struct dev_state *ps; |
| 68 | struct pid *pid; |
| 69 | uid_t uid, euid; |
| 70 | unsigned int signr; |
| 71 | unsigned int ifnum; |
| 72 | void __user *userbuffer; |
| 73 | void __user *userurb; |
| 74 | struct urb *urb; |
| 75 | u32 secid; |
| 76 | }; |
| 77 | |
| 78 | static int usbfs_snoop = 0; |
| 79 | module_param (usbfs_snoop, bool, S_IRUGO | S_IWUSR); |
| 80 | MODULE_PARM_DESC (usbfs_snoop, "true to log all usbfs traffic"); |
| 81 | |
| 82 | #define snoop(dev, format, arg...) \ |
| 83 | do { \ |
| 84 | if (usbfs_snoop) \ |
| 85 | dev_info( dev , format , ## arg); \ |
| 86 | } while (0) |
| 87 | |
| 88 | #define USB_DEVICE_DEV MKDEV(USB_DEVICE_MAJOR, 0) |
| 89 | |
| 90 | |
| 91 | #define MAX_USBFS_BUFFER_SIZE 16384 |
| 92 | |
| 93 | static inline int connected (struct dev_state *ps) |
| 94 | { |
| 95 | return (!list_empty(&ps->list) && |
| 96 | ps->dev->state != USB_STATE_NOTATTACHED); |
| 97 | } |
| 98 | |
| 99 | static loff_t usbdev_lseek(struct file *file, loff_t offset, int orig) |
| 100 | { |
| 101 | loff_t ret; |
| 102 | |
| 103 | lock_kernel(); |
| 104 | |
| 105 | switch (orig) { |
| 106 | case 0: |
| 107 | file->f_pos = offset; |
| 108 | ret = file->f_pos; |
| 109 | break; |
| 110 | case 1: |
| 111 | file->f_pos += offset; |
| 112 | ret = file->f_pos; |
| 113 | break; |
| 114 | case 2: |
| 115 | default: |
| 116 | ret = -EINVAL; |
| 117 | } |
| 118 | |
| 119 | unlock_kernel(); |
| 120 | return ret; |
| 121 | } |
| 122 | |
| 123 | static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos) |
| 124 | { |
| 125 | struct dev_state *ps = file->private_data; |
| 126 | struct usb_device *dev = ps->dev; |
| 127 | ssize_t ret = 0; |
| 128 | unsigned len; |
| 129 | loff_t pos; |
| 130 | int i; |
| 131 | |
| 132 | pos = *ppos; |
| 133 | usb_lock_device(dev); |
| 134 | if (!connected(ps)) { |
| 135 | ret = -ENODEV; |
| 136 | goto err; |
| 137 | } else if (pos < 0) { |
| 138 | ret = -EINVAL; |
| 139 | goto err; |
| 140 | } |
| 141 | |
| 142 | if (pos < sizeof(struct usb_device_descriptor)) { |
| 143 | struct usb_device_descriptor temp_desc ; /* 18 bytes - fits on the stack */ |
| 144 | |
| 145 | memcpy(&temp_desc, &dev->descriptor, sizeof(dev->descriptor)); |
| 146 | le16_to_cpus(&temp_desc.bcdUSB); |
| 147 | le16_to_cpus(&temp_desc.idVendor); |
| 148 | le16_to_cpus(&temp_desc.idProduct); |
| 149 | le16_to_cpus(&temp_desc.bcdDevice); |
| 150 | |
| 151 | len = sizeof(struct usb_device_descriptor) - pos; |
| 152 | if (len > nbytes) |
| 153 | len = nbytes; |
| 154 | if (copy_to_user(buf, ((char *)&temp_desc) + pos, len)) { |
| 155 | ret = -EFAULT; |
| 156 | goto err; |
| 157 | } |
| 158 | |
| 159 | *ppos += len; |
| 160 | buf += len; |
| 161 | nbytes -= len; |
| 162 | ret += len; |
| 163 | } |
| 164 | |
| 165 | pos = sizeof(struct usb_device_descriptor); |
| 166 | for (i = 0; nbytes && i < dev->descriptor.bNumConfigurations; i++) { |
| 167 | struct usb_config_descriptor *config = |
| 168 | (struct usb_config_descriptor *)dev->rawdescriptors[i]; |
| 169 | unsigned int length = le16_to_cpu(config->wTotalLength); |
| 170 | |
| 171 | if (*ppos < pos + length) { |
| 172 | |
| 173 | /* The descriptor may claim to be longer than it |
| 174 | * really is. Here is the actual allocated length. */ |
| 175 | unsigned alloclen = |
| 176 | le16_to_cpu(dev->config[i].desc.wTotalLength); |
| 177 | |
| 178 | len = length - (*ppos - pos); |
| 179 | if (len > nbytes) |
| 180 | len = nbytes; |
| 181 | |
| 182 | /* Simply don't write (skip over) unallocated parts */ |
| 183 | if (alloclen > (*ppos - pos)) { |
| 184 | alloclen -= (*ppos - pos); |
| 185 | if (copy_to_user(buf, |
| 186 | dev->rawdescriptors[i] + (*ppos - pos), |
| 187 | min(len, alloclen))) { |
| 188 | ret = -EFAULT; |
| 189 | goto err; |
| 190 | } |
| 191 | } |
| 192 | |
| 193 | *ppos += len; |
| 194 | buf += len; |
| 195 | nbytes -= len; |
| 196 | ret += len; |
| 197 | } |
| 198 | |
| 199 | pos += length; |
| 200 | } |
| 201 | |
| 202 | err: |
| 203 | usb_unlock_device(dev); |
| 204 | return ret; |
| 205 | } |
| 206 | |
| 207 | /* |
| 208 | * async list handling |
| 209 | */ |
| 210 | |
| 211 | static struct async *alloc_async(unsigned int numisoframes) |
| 212 | { |
| 213 | unsigned int assize = sizeof(struct async) + numisoframes * sizeof(struct usb_iso_packet_descriptor); |
| 214 | struct async *as = kzalloc(assize, GFP_KERNEL); |
| 215 | |
| 216 | if (!as) |
| 217 | return NULL; |
| 218 | as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL); |
| 219 | if (!as->urb) { |
| 220 | kfree(as); |
| 221 | return NULL; |
| 222 | } |
| 223 | return as; |
| 224 | } |
| 225 | |
| 226 | static void free_async(struct async *as) |
| 227 | { |
| 228 | put_pid(as->pid); |
| 229 | kfree(as->urb->transfer_buffer); |
| 230 | kfree(as->urb->setup_packet); |
| 231 | usb_free_urb(as->urb); |
| 232 | kfree(as); |
| 233 | } |
| 234 | |
| 235 | static inline void async_newpending(struct async *as) |
| 236 | { |
| 237 | struct dev_state *ps = as->ps; |
| 238 | unsigned long flags; |
| 239 | |
| 240 | spin_lock_irqsave(&ps->lock, flags); |
| 241 | list_add_tail(&as->asynclist, &ps->async_pending); |
| 242 | spin_unlock_irqrestore(&ps->lock, flags); |
| 243 | } |
| 244 | |
| 245 | static inline void async_removepending(struct async *as) |
| 246 | { |
| 247 | struct dev_state *ps = as->ps; |
| 248 | unsigned long flags; |
| 249 | |
| 250 | spin_lock_irqsave(&ps->lock, flags); |
| 251 | list_del_init(&as->asynclist); |
| 252 | spin_unlock_irqrestore(&ps->lock, flags); |
| 253 | } |
| 254 | |
| 255 | static inline struct async *async_getcompleted(struct dev_state *ps) |
| 256 | { |
| 257 | unsigned long flags; |
| 258 | struct async *as = NULL; |
| 259 | |
| 260 | spin_lock_irqsave(&ps->lock, flags); |
| 261 | if (!list_empty(&ps->async_completed)) { |
| 262 | as = list_entry(ps->async_completed.next, struct async, asynclist); |
| 263 | list_del_init(&as->asynclist); |
| 264 | } |
| 265 | spin_unlock_irqrestore(&ps->lock, flags); |
| 266 | return as; |
| 267 | } |
| 268 | |
| 269 | static inline struct async *async_getpending(struct dev_state *ps, void __user *userurb) |
| 270 | { |
| 271 | unsigned long flags; |
| 272 | struct async *as; |
| 273 | |
| 274 | spin_lock_irqsave(&ps->lock, flags); |
| 275 | list_for_each_entry(as, &ps->async_pending, asynclist) |
| 276 | if (as->userurb == userurb) { |
| 277 | list_del_init(&as->asynclist); |
| 278 | spin_unlock_irqrestore(&ps->lock, flags); |
| 279 | return as; |
| 280 | } |
| 281 | spin_unlock_irqrestore(&ps->lock, flags); |
| 282 | return NULL; |
| 283 | } |
| 284 | |
| 285 | static void snoop_urb(struct urb *urb, void __user *userurb) |
| 286 | { |
| 287 | int j; |
| 288 | unsigned char *data = urb->transfer_buffer; |
| 289 | |
| 290 | if (!usbfs_snoop) |
| 291 | return; |
| 292 | |
| 293 | if (urb->pipe & USB_DIR_IN) |
| 294 | dev_info(&urb->dev->dev, "direction=IN\n"); |
| 295 | else |
| 296 | dev_info(&urb->dev->dev, "direction=OUT\n"); |
| 297 | dev_info(&urb->dev->dev, "userurb=%p\n", userurb); |
| 298 | dev_info(&urb->dev->dev, "transfer_buffer_length=%d\n", |
| 299 | urb->transfer_buffer_length); |
| 300 | dev_info(&urb->dev->dev, "actual_length=%d\n", urb->actual_length); |
| 301 | dev_info(&urb->dev->dev, "data: "); |
| 302 | for (j = 0; j < urb->transfer_buffer_length; ++j) |
| 303 | printk ("%02x ", data[j]); |
| 304 | printk("\n"); |
| 305 | } |
| 306 | |
| 307 | static void async_completed(struct urb *urb) |
| 308 | { |
| 309 | struct async *as = urb->context; |
| 310 | struct dev_state *ps = as->ps; |
| 311 | struct siginfo sinfo; |
| 312 | |
| 313 | spin_lock(&ps->lock); |
| 314 | list_move_tail(&as->asynclist, &ps->async_completed); |
| 315 | spin_unlock(&ps->lock); |
| 316 | if (as->signr) { |
| 317 | sinfo.si_signo = as->signr; |
| 318 | sinfo.si_errno = as->urb->status; |
| 319 | sinfo.si_code = SI_ASYNCIO; |
| 320 | sinfo.si_addr = as->userurb; |
| 321 | kill_pid_info_as_uid(as->signr, &sinfo, as->pid, as->uid, |
| 322 | as->euid, as->secid); |
| 323 | } |
| 324 | snoop(&urb->dev->dev, "urb complete\n"); |
| 325 | snoop_urb(urb, as->userurb); |
| 326 | wake_up(&ps->wait); |
| 327 | } |
| 328 | |
| 329 | static void destroy_async (struct dev_state *ps, struct list_head *list) |
| 330 | { |
| 331 | struct async *as; |
| 332 | unsigned long flags; |
| 333 | |
| 334 | spin_lock_irqsave(&ps->lock, flags); |
| 335 | while (!list_empty(list)) { |
| 336 | as = list_entry(list->next, struct async, asynclist); |
| 337 | list_del_init(&as->asynclist); |
| 338 | |
| 339 | /* drop the spinlock so the completion handler can run */ |
| 340 | spin_unlock_irqrestore(&ps->lock, flags); |
| 341 | usb_kill_urb(as->urb); |
| 342 | spin_lock_irqsave(&ps->lock, flags); |
| 343 | } |
| 344 | spin_unlock_irqrestore(&ps->lock, flags); |
| 345 | as = async_getcompleted(ps); |
| 346 | while (as) { |
| 347 | free_async(as); |
| 348 | as = async_getcompleted(ps); |
| 349 | } |
| 350 | } |
| 351 | |
| 352 | static void destroy_async_on_interface (struct dev_state *ps, unsigned int ifnum) |
| 353 | { |
| 354 | struct list_head *p, *q, hitlist; |
| 355 | unsigned long flags; |
| 356 | |
| 357 | INIT_LIST_HEAD(&hitlist); |
| 358 | spin_lock_irqsave(&ps->lock, flags); |
| 359 | list_for_each_safe(p, q, &ps->async_pending) |
| 360 | if (ifnum == list_entry(p, struct async, asynclist)->ifnum) |
| 361 | list_move_tail(p, &hitlist); |
| 362 | spin_unlock_irqrestore(&ps->lock, flags); |
| 363 | destroy_async(ps, &hitlist); |
| 364 | } |
| 365 | |
| 366 | static inline void destroy_all_async(struct dev_state *ps) |
| 367 | { |
| 368 | destroy_async(ps, &ps->async_pending); |
| 369 | } |
| 370 | |
| 371 | /* |
| 372 | * interface claims are made only at the request of user level code, |
| 373 | * which can also release them (explicitly or by closing files). |
| 374 | * they're also undone when devices disconnect. |
| 375 | */ |
| 376 | |
| 377 | static int driver_probe (struct usb_interface *intf, |
| 378 | const struct usb_device_id *id) |
| 379 | { |
| 380 | return -ENODEV; |
| 381 | } |
| 382 | |
| 383 | static void driver_disconnect(struct usb_interface *intf) |
| 384 | { |
| 385 | struct dev_state *ps = usb_get_intfdata (intf); |
| 386 | unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber; |
| 387 | |
| 388 | if (!ps) |
| 389 | return; |
| 390 | |
| 391 | /* NOTE: this relies on usbcore having canceled and completed |
| 392 | * all pending I/O requests; 2.6 does that. |
| 393 | */ |
| 394 | |
| 395 | if (likely(ifnum < 8*sizeof(ps->ifclaimed))) |
| 396 | clear_bit(ifnum, &ps->ifclaimed); |
| 397 | else |
| 398 | warn("interface number %u out of range", ifnum); |
| 399 | |
| 400 | usb_set_intfdata (intf, NULL); |
| 401 | |
| 402 | /* force async requests to complete */ |
| 403 | destroy_async_on_interface(ps, ifnum); |
| 404 | } |
| 405 | |
| 406 | struct usb_driver usbfs_driver = { |
| 407 | .name = "usbfs", |
| 408 | .probe = driver_probe, |
| 409 | .disconnect = driver_disconnect, |
| 410 | }; |
| 411 | |
| 412 | static int claimintf(struct dev_state *ps, unsigned int ifnum) |
| 413 | { |
| 414 | struct usb_device *dev = ps->dev; |
| 415 | struct usb_interface *intf; |
| 416 | int err; |
| 417 | |
| 418 | if (ifnum >= 8*sizeof(ps->ifclaimed)) |
| 419 | return -EINVAL; |
| 420 | /* already claimed */ |
| 421 | if (test_bit(ifnum, &ps->ifclaimed)) |
| 422 | return 0; |
| 423 | |
| 424 | /* lock against other changes to driver bindings */ |
| 425 | down_write(&usb_bus_type.subsys.rwsem); |
| 426 | intf = usb_ifnum_to_if(dev, ifnum); |
| 427 | if (!intf) |
| 428 | err = -ENOENT; |
| 429 | else |
| 430 | err = usb_driver_claim_interface(&usbfs_driver, intf, ps); |
| 431 | up_write(&usb_bus_type.subsys.rwsem); |
| 432 | if (err == 0) |
| 433 | set_bit(ifnum, &ps->ifclaimed); |
| 434 | return err; |
| 435 | } |
| 436 | |
| 437 | static int releaseintf(struct dev_state *ps, unsigned int ifnum) |
| 438 | { |
| 439 | struct usb_device *dev; |
| 440 | struct usb_interface *intf; |
| 441 | int err; |
| 442 | |
| 443 | err = -EINVAL; |
| 444 | if (ifnum >= 8*sizeof(ps->ifclaimed)) |
| 445 | return err; |
| 446 | dev = ps->dev; |
| 447 | /* lock against other changes to driver bindings */ |
| 448 | down_write(&usb_bus_type.subsys.rwsem); |
| 449 | intf = usb_ifnum_to_if(dev, ifnum); |
| 450 | if (!intf) |
| 451 | err = -ENOENT; |
| 452 | else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) { |
| 453 | usb_driver_release_interface(&usbfs_driver, intf); |
| 454 | err = 0; |
| 455 | } |
| 456 | up_write(&usb_bus_type.subsys.rwsem); |
| 457 | return err; |
| 458 | } |
| 459 | |
| 460 | static int checkintf(struct dev_state *ps, unsigned int ifnum) |
| 461 | { |
| 462 | if (ps->dev->state != USB_STATE_CONFIGURED) |
| 463 | return -EHOSTUNREACH; |
| 464 | if (ifnum >= 8*sizeof(ps->ifclaimed)) |
| 465 | return -EINVAL; |
| 466 | if (test_bit(ifnum, &ps->ifclaimed)) |
| 467 | return 0; |
| 468 | /* if not yet claimed, claim it for the driver */ |
| 469 | dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim interface %u before use\n", |
| 470 | current->pid, current->comm, ifnum); |
| 471 | return claimintf(ps, ifnum); |
| 472 | } |
| 473 | |
| 474 | static int findintfep(struct usb_device *dev, unsigned int ep) |
| 475 | { |
| 476 | unsigned int i, j, e; |
| 477 | struct usb_interface *intf; |
| 478 | struct usb_host_interface *alts; |
| 479 | struct usb_endpoint_descriptor *endpt; |
| 480 | |
| 481 | if (ep & ~(USB_DIR_IN|0xf)) |
| 482 | return -EINVAL; |
| 483 | if (!dev->actconfig) |
| 484 | return -ESRCH; |
| 485 | for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) { |
| 486 | intf = dev->actconfig->interface[i]; |
| 487 | for (j = 0; j < intf->num_altsetting; j++) { |
| 488 | alts = &intf->altsetting[j]; |
| 489 | for (e = 0; e < alts->desc.bNumEndpoints; e++) { |
| 490 | endpt = &alts->endpoint[e].desc; |
| 491 | if (endpt->bEndpointAddress == ep) |
| 492 | return alts->desc.bInterfaceNumber; |
| 493 | } |
| 494 | } |
| 495 | } |
| 496 | return -ENOENT; |
| 497 | } |
| 498 | |
| 499 | static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype, unsigned int index) |
| 500 | { |
| 501 | int ret = 0; |
| 502 | |
| 503 | if (ps->dev->state != USB_STATE_ADDRESS |
| 504 | && ps->dev->state != USB_STATE_CONFIGURED) |
| 505 | return -EHOSTUNREACH; |
| 506 | if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype)) |
| 507 | return 0; |
| 508 | |
| 509 | index &= 0xff; |
| 510 | switch (requesttype & USB_RECIP_MASK) { |
| 511 | case USB_RECIP_ENDPOINT: |
| 512 | if ((ret = findintfep(ps->dev, index)) >= 0) |
| 513 | ret = checkintf(ps, ret); |
| 514 | break; |
| 515 | |
| 516 | case USB_RECIP_INTERFACE: |
| 517 | ret = checkintf(ps, index); |
| 518 | break; |
| 519 | } |
| 520 | return ret; |
| 521 | } |
| 522 | |
| 523 | static struct usb_device *usbdev_lookup_minor(int minor) |
| 524 | { |
| 525 | struct class_device *class_dev; |
| 526 | struct usb_device *dev = NULL; |
| 527 | |
| 528 | down(&usb_device_class->sem); |
| 529 | list_for_each_entry(class_dev, &usb_device_class->children, node) { |
| 530 | if (class_dev->devt == MKDEV(USB_DEVICE_MAJOR, minor)) { |
| 531 | dev = class_dev->class_data; |
| 532 | break; |
| 533 | } |
| 534 | } |
| 535 | up(&usb_device_class->sem); |
| 536 | |
| 537 | return dev; |
| 538 | }; |
| 539 | |
| 540 | /* |
| 541 | * file operations |
| 542 | */ |
| 543 | static int usbdev_open(struct inode *inode, struct file *file) |
| 544 | { |
| 545 | struct usb_device *dev = NULL; |
| 546 | struct dev_state *ps; |
| 547 | int ret; |
| 548 | |
| 549 | /* Protect against simultaneous removal or release */ |
| 550 | mutex_lock(&usbfs_mutex); |
| 551 | |
| 552 | ret = -ENOMEM; |
| 553 | if (!(ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL))) |
| 554 | goto out; |
| 555 | |
| 556 | ret = -ENOENT; |
| 557 | /* check if we are called from a real node or usbfs */ |
| 558 | if (imajor(inode) == USB_DEVICE_MAJOR) |
| 559 | dev = usbdev_lookup_minor(iminor(inode)); |
| 560 | if (!dev) |
| 561 | dev = inode->i_private; |
| 562 | if (!dev) |
| 563 | goto out; |
| 564 | ret = usb_autoresume_device(dev, 1); |
| 565 | if (ret) |
| 566 | goto out; |
| 567 | |
| 568 | usb_get_dev(dev); |
| 569 | ret = 0; |
| 570 | ps->dev = dev; |
| 571 | ps->file = file; |
| 572 | spin_lock_init(&ps->lock); |
| 573 | INIT_LIST_HEAD(&ps->async_pending); |
| 574 | INIT_LIST_HEAD(&ps->async_completed); |
| 575 | init_waitqueue_head(&ps->wait); |
| 576 | ps->discsignr = 0; |
| 577 | ps->disc_pid = get_pid(task_pid(current)); |
| 578 | ps->disc_uid = current->uid; |
| 579 | ps->disc_euid = current->euid; |
| 580 | ps->disccontext = NULL; |
| 581 | ps->ifclaimed = 0; |
| 582 | security_task_getsecid(current, &ps->secid); |
| 583 | wmb(); |
| 584 | list_add_tail(&ps->list, &dev->filelist); |
| 585 | file->private_data = ps; |
| 586 | out: |
| 587 | if (ret) |
| 588 | kfree(ps); |
| 589 | mutex_unlock(&usbfs_mutex); |
| 590 | return ret; |
| 591 | } |
| 592 | |
| 593 | static int usbdev_release(struct inode *inode, struct file *file) |
| 594 | { |
| 595 | struct dev_state *ps = file->private_data; |
| 596 | struct usb_device *dev = ps->dev; |
| 597 | unsigned int ifnum; |
| 598 | |
| 599 | usb_lock_device(dev); |
| 600 | |
| 601 | /* Protect against simultaneous open */ |
| 602 | mutex_lock(&usbfs_mutex); |
| 603 | list_del_init(&ps->list); |
| 604 | mutex_unlock(&usbfs_mutex); |
| 605 | |
| 606 | for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed); |
| 607 | ifnum++) { |
| 608 | if (test_bit(ifnum, &ps->ifclaimed)) |
| 609 | releaseintf(ps, ifnum); |
| 610 | } |
| 611 | destroy_all_async(ps); |
| 612 | usb_autosuspend_device(dev, 1); |
| 613 | usb_unlock_device(dev); |
| 614 | usb_put_dev(dev); |
| 615 | put_pid(ps->disc_pid); |
| 616 | kfree(ps); |
| 617 | return 0; |
| 618 | } |
| 619 | |
| 620 | static int proc_control(struct dev_state *ps, void __user *arg) |
| 621 | { |
| 622 | struct usb_device *dev = ps->dev; |
| 623 | struct usbdevfs_ctrltransfer ctrl; |
| 624 | unsigned int tmo; |
| 625 | unsigned char *tbuf; |
| 626 | int i, j, ret; |
| 627 | |
| 628 | if (copy_from_user(&ctrl, arg, sizeof(ctrl))) |
| 629 | return -EFAULT; |
| 630 | if ((ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.wIndex))) |
| 631 | return ret; |
| 632 | if (ctrl.wLength > PAGE_SIZE) |
| 633 | return -EINVAL; |
| 634 | if (!(tbuf = (unsigned char *)__get_free_page(GFP_KERNEL))) |
| 635 | return -ENOMEM; |
| 636 | tmo = ctrl.timeout; |
| 637 | if (ctrl.bRequestType & 0x80) { |
| 638 | if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data, ctrl.wLength)) { |
| 639 | free_page((unsigned long)tbuf); |
| 640 | return -EINVAL; |
| 641 | } |
| 642 | snoop(&dev->dev, "control read: bRequest=%02x " |
| 643 | "bRrequestType=%02x wValue=%04x " |
| 644 | "wIndex=%04x wLength=%04x\n", |
| 645 | ctrl.bRequest, ctrl.bRequestType, ctrl.wValue, |
| 646 | ctrl.wIndex, ctrl.wLength); |
| 647 | |
| 648 | usb_unlock_device(dev); |
| 649 | i = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType, |
| 650 | ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo); |
| 651 | usb_lock_device(dev); |
| 652 | if ((i > 0) && ctrl.wLength) { |
| 653 | if (usbfs_snoop) { |
| 654 | dev_info(&dev->dev, "control read: data "); |
| 655 | for (j = 0; j < i; ++j) |
| 656 | printk("%02x ", (unsigned char)(tbuf)[j]); |
| 657 | printk("\n"); |
| 658 | } |
| 659 | if (copy_to_user(ctrl.data, tbuf, i)) { |
| 660 | free_page((unsigned long)tbuf); |
| 661 | return -EFAULT; |
| 662 | } |
| 663 | } |
| 664 | } else { |
| 665 | if (ctrl.wLength) { |
| 666 | if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) { |
| 667 | free_page((unsigned long)tbuf); |
| 668 | return -EFAULT; |
| 669 | } |
| 670 | } |
| 671 | snoop(&dev->dev, "control write: bRequest=%02x " |
| 672 | "bRrequestType=%02x wValue=%04x " |
| 673 | "wIndex=%04x wLength=%04x\n", |
| 674 | ctrl.bRequest, ctrl.bRequestType, ctrl.wValue, |
| 675 | ctrl.wIndex, ctrl.wLength); |
| 676 | if (usbfs_snoop) { |
| 677 | dev_info(&dev->dev, "control write: data: "); |
| 678 | for (j = 0; j < ctrl.wLength; ++j) |
| 679 | printk("%02x ", (unsigned char)(tbuf)[j]); |
| 680 | printk("\n"); |
| 681 | } |
| 682 | usb_unlock_device(dev); |
| 683 | i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType, |
| 684 | ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo); |
| 685 | usb_lock_device(dev); |
| 686 | } |
| 687 | free_page((unsigned long)tbuf); |
| 688 | if (i<0 && i != -EPIPE) { |
| 689 | dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL " |
| 690 | "failed cmd %s rqt %u rq %u len %u ret %d\n", |
| 691 | current->comm, ctrl.bRequestType, ctrl.bRequest, |
| 692 | ctrl.wLength, i); |
| 693 | } |
| 694 | return i; |
| 695 | } |
| 696 | |
| 697 | static int proc_bulk(struct dev_state *ps, void __user *arg) |
| 698 | { |
| 699 | struct usb_device *dev = ps->dev; |
| 700 | struct usbdevfs_bulktransfer bulk; |
| 701 | unsigned int tmo, len1, pipe; |
| 702 | int len2; |
| 703 | unsigned char *tbuf; |
| 704 | int i, j, ret; |
| 705 | |
| 706 | if (copy_from_user(&bulk, arg, sizeof(bulk))) |
| 707 | return -EFAULT; |
| 708 | if ((ret = findintfep(ps->dev, bulk.ep)) < 0) |
| 709 | return ret; |
| 710 | if ((ret = checkintf(ps, ret))) |
| 711 | return ret; |
| 712 | if (bulk.ep & USB_DIR_IN) |
| 713 | pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f); |
| 714 | else |
| 715 | pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f); |
| 716 | if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN))) |
| 717 | return -EINVAL; |
| 718 | len1 = bulk.len; |
| 719 | if (len1 > MAX_USBFS_BUFFER_SIZE) |
| 720 | return -EINVAL; |
| 721 | if (!(tbuf = kmalloc(len1, GFP_KERNEL))) |
| 722 | return -ENOMEM; |
| 723 | tmo = bulk.timeout; |
| 724 | if (bulk.ep & 0x80) { |
| 725 | if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) { |
| 726 | kfree(tbuf); |
| 727 | return -EINVAL; |
| 728 | } |
| 729 | snoop(&dev->dev, "bulk read: len=0x%02x timeout=%04d\n", |
| 730 | bulk.len, bulk.timeout); |
| 731 | usb_unlock_device(dev); |
| 732 | i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo); |
| 733 | usb_lock_device(dev); |
| 734 | if (!i && len2) { |
| 735 | if (usbfs_snoop) { |
| 736 | dev_info(&dev->dev, "bulk read: data "); |
| 737 | for (j = 0; j < len2; ++j) |
| 738 | printk("%02x ", (unsigned char)(tbuf)[j]); |
| 739 | printk("\n"); |
| 740 | } |
| 741 | if (copy_to_user(bulk.data, tbuf, len2)) { |
| 742 | kfree(tbuf); |
| 743 | return -EFAULT; |
| 744 | } |
| 745 | } |
| 746 | } else { |
| 747 | if (len1) { |
| 748 | if (copy_from_user(tbuf, bulk.data, len1)) { |
| 749 | kfree(tbuf); |
| 750 | return -EFAULT; |
| 751 | } |
| 752 | } |
| 753 | snoop(&dev->dev, "bulk write: len=0x%02x timeout=%04d\n", |
| 754 | bulk.len, bulk.timeout); |
| 755 | if (usbfs_snoop) { |
| 756 | dev_info(&dev->dev, "bulk write: data: "); |
| 757 | for (j = 0; j < len1; ++j) |
| 758 | printk("%02x ", (unsigned char)(tbuf)[j]); |
| 759 | printk("\n"); |
| 760 | } |
| 761 | usb_unlock_device(dev); |
| 762 | i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo); |
| 763 | usb_lock_device(dev); |
| 764 | } |
| 765 | kfree(tbuf); |
| 766 | if (i < 0) |
| 767 | return i; |
| 768 | return len2; |
| 769 | } |
| 770 | |
| 771 | static int proc_resetep(struct dev_state *ps, void __user *arg) |
| 772 | { |
| 773 | unsigned int ep; |
| 774 | int ret; |
| 775 | |
| 776 | if (get_user(ep, (unsigned int __user *)arg)) |
| 777 | return -EFAULT; |
| 778 | if ((ret = findintfep(ps->dev, ep)) < 0) |
| 779 | return ret; |
| 780 | if ((ret = checkintf(ps, ret))) |
| 781 | return ret; |
| 782 | usb_settoggle(ps->dev, ep & 0xf, !(ep & USB_DIR_IN), 0); |
| 783 | return 0; |
| 784 | } |
| 785 | |
| 786 | static int proc_clearhalt(struct dev_state *ps, void __user *arg) |
| 787 | { |
| 788 | unsigned int ep; |
| 789 | int pipe; |
| 790 | int ret; |
| 791 | |
| 792 | if (get_user(ep, (unsigned int __user *)arg)) |
| 793 | return -EFAULT; |
| 794 | if ((ret = findintfep(ps->dev, ep)) < 0) |
| 795 | return ret; |
| 796 | if ((ret = checkintf(ps, ret))) |
| 797 | return ret; |
| 798 | if (ep & USB_DIR_IN) |
| 799 | pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f); |
| 800 | else |
| 801 | pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f); |
| 802 | |
| 803 | return usb_clear_halt(ps->dev, pipe); |
| 804 | } |
| 805 | |
| 806 | |
| 807 | static int proc_getdriver(struct dev_state *ps, void __user *arg) |
| 808 | { |
| 809 | struct usbdevfs_getdriver gd; |
| 810 | struct usb_interface *intf; |
| 811 | int ret; |
| 812 | |
| 813 | if (copy_from_user(&gd, arg, sizeof(gd))) |
| 814 | return -EFAULT; |
| 815 | down_read(&usb_bus_type.subsys.rwsem); |
| 816 | intf = usb_ifnum_to_if(ps->dev, gd.interface); |
| 817 | if (!intf || !intf->dev.driver) |
| 818 | ret = -ENODATA; |
| 819 | else { |
| 820 | strncpy(gd.driver, intf->dev.driver->name, |
| 821 | sizeof(gd.driver)); |
| 822 | ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0); |
| 823 | } |
| 824 | up_read(&usb_bus_type.subsys.rwsem); |
| 825 | return ret; |
| 826 | } |
| 827 | |
| 828 | static int proc_connectinfo(struct dev_state *ps, void __user *arg) |
| 829 | { |
| 830 | struct usbdevfs_connectinfo ci; |
| 831 | |
| 832 | ci.devnum = ps->dev->devnum; |
| 833 | ci.slow = ps->dev->speed == USB_SPEED_LOW; |
| 834 | if (copy_to_user(arg, &ci, sizeof(ci))) |
| 835 | return -EFAULT; |
| 836 | return 0; |
| 837 | } |
| 838 | |
| 839 | static int proc_resetdevice(struct dev_state *ps) |
| 840 | { |
| 841 | return usb_reset_composite_device(ps->dev, NULL); |
| 842 | } |
| 843 | |
| 844 | static int proc_setintf(struct dev_state *ps, void __user *arg) |
| 845 | { |
| 846 | struct usbdevfs_setinterface setintf; |
| 847 | int ret; |
| 848 | |
| 849 | if (copy_from_user(&setintf, arg, sizeof(setintf))) |
| 850 | return -EFAULT; |
| 851 | if ((ret = checkintf(ps, setintf.interface))) |
| 852 | return ret; |
| 853 | return usb_set_interface(ps->dev, setintf.interface, |
| 854 | setintf.altsetting); |
| 855 | } |
| 856 | |
| 857 | static int proc_setconfig(struct dev_state *ps, void __user *arg) |
| 858 | { |
| 859 | unsigned int u; |
| 860 | int status = 0; |
| 861 | struct usb_host_config *actconfig; |
| 862 | |
| 863 | if (get_user(u, (unsigned int __user *)arg)) |
| 864 | return -EFAULT; |
| 865 | |
| 866 | actconfig = ps->dev->actconfig; |
| 867 | |
| 868 | /* Don't touch the device if any interfaces are claimed. |
| 869 | * It could interfere with other drivers' operations, and if |
| 870 | * an interface is claimed by usbfs it could easily deadlock. |
| 871 | */ |
| 872 | if (actconfig) { |
| 873 | int i; |
| 874 | |
| 875 | for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) { |
| 876 | if (usb_interface_claimed(actconfig->interface[i])) { |
| 877 | dev_warn (&ps->dev->dev, |
| 878 | "usbfs: interface %d claimed by %s " |
| 879 | "while '%s' sets config #%d\n", |
| 880 | actconfig->interface[i] |
| 881 | ->cur_altsetting |
| 882 | ->desc.bInterfaceNumber, |
| 883 | actconfig->interface[i] |
| 884 | ->dev.driver->name, |
| 885 | current->comm, u); |
| 886 | status = -EBUSY; |
| 887 | break; |
| 888 | } |
| 889 | } |
| 890 | } |
| 891 | |
| 892 | /* SET_CONFIGURATION is often abused as a "cheap" driver reset, |
| 893 | * so avoid usb_set_configuration()'s kick to sysfs |
| 894 | */ |
| 895 | if (status == 0) { |
| 896 | if (actconfig && actconfig->desc.bConfigurationValue == u) |
| 897 | status = usb_reset_configuration(ps->dev); |
| 898 | else |
| 899 | status = usb_set_configuration(ps->dev, u); |
| 900 | } |
| 901 | |
| 902 | return status; |
| 903 | } |
| 904 | |
| 905 | static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb, |
| 906 | struct usbdevfs_iso_packet_desc __user *iso_frame_desc, |
| 907 | void __user *arg) |
| 908 | { |
| 909 | struct usbdevfs_iso_packet_desc *isopkt = NULL; |
| 910 | struct usb_host_endpoint *ep; |
| 911 | struct async *as; |
| 912 | struct usb_ctrlrequest *dr = NULL; |
| 913 | unsigned int u, totlen, isofrmlen; |
| 914 | int ret, interval = 0, ifnum = -1; |
| 915 | |
| 916 | if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP|USBDEVFS_URB_SHORT_NOT_OK| |
| 917 | URB_NO_FSBR|URB_ZERO_PACKET)) |
| 918 | return -EINVAL; |
| 919 | if (!uurb->buffer) |
| 920 | return -EINVAL; |
| 921 | if (uurb->signr != 0 && (uurb->signr < SIGRTMIN || uurb->signr > SIGRTMAX)) |
| 922 | return -EINVAL; |
| 923 | if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL && (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) { |
| 924 | if ((ifnum = findintfep(ps->dev, uurb->endpoint)) < 0) |
| 925 | return ifnum; |
| 926 | if ((ret = checkintf(ps, ifnum))) |
| 927 | return ret; |
| 928 | } |
| 929 | if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0) |
| 930 | ep = ps->dev->ep_in [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK]; |
| 931 | else |
| 932 | ep = ps->dev->ep_out [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK]; |
| 933 | if (!ep) |
| 934 | return -ENOENT; |
| 935 | switch(uurb->type) { |
| 936 | case USBDEVFS_URB_TYPE_CONTROL: |
| 937 | if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) |
| 938 | != USB_ENDPOINT_XFER_CONTROL) |
| 939 | return -EINVAL; |
| 940 | /* min 8 byte setup packet, max 8 byte setup plus an arbitrary data stage */ |
| 941 | if (uurb->buffer_length < 8 || uurb->buffer_length > (8 + MAX_USBFS_BUFFER_SIZE)) |
| 942 | return -EINVAL; |
| 943 | if (!(dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL))) |
| 944 | return -ENOMEM; |
| 945 | if (copy_from_user(dr, uurb->buffer, 8)) { |
| 946 | kfree(dr); |
| 947 | return -EFAULT; |
| 948 | } |
| 949 | if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) { |
| 950 | kfree(dr); |
| 951 | return -EINVAL; |
| 952 | } |
| 953 | if ((ret = check_ctrlrecip(ps, dr->bRequestType, le16_to_cpup(&dr->wIndex)))) { |
| 954 | kfree(dr); |
| 955 | return ret; |
| 956 | } |
| 957 | uurb->endpoint = (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) | (dr->bRequestType & USB_ENDPOINT_DIR_MASK); |
| 958 | uurb->number_of_packets = 0; |
| 959 | uurb->buffer_length = le16_to_cpup(&dr->wLength); |
| 960 | uurb->buffer += 8; |
| 961 | if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) { |
| 962 | kfree(dr); |
| 963 | return -EFAULT; |
| 964 | } |
| 965 | snoop(&ps->dev->dev, "control urb\n"); |
| 966 | break; |
| 967 | |
| 968 | case USBDEVFS_URB_TYPE_BULK: |
| 969 | switch (ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) { |
| 970 | case USB_ENDPOINT_XFER_CONTROL: |
| 971 | case USB_ENDPOINT_XFER_ISOC: |
| 972 | return -EINVAL; |
| 973 | /* allow single-shot interrupt transfers, at bogus rates */ |
| 974 | } |
| 975 | uurb->number_of_packets = 0; |
| 976 | if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE) |
| 977 | return -EINVAL; |
| 978 | if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) |
| 979 | return -EFAULT; |
| 980 | snoop(&ps->dev->dev, "bulk urb\n"); |
| 981 | break; |
| 982 | |
| 983 | case USBDEVFS_URB_TYPE_ISO: |
| 984 | /* arbitrary limit */ |
| 985 | if (uurb->number_of_packets < 1 || uurb->number_of_packets > 128) |
| 986 | return -EINVAL; |
| 987 | if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) |
| 988 | != USB_ENDPOINT_XFER_ISOC) |
| 989 | return -EINVAL; |
| 990 | interval = 1 << min (15, ep->desc.bInterval - 1); |
| 991 | isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * uurb->number_of_packets; |
| 992 | if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL))) |
| 993 | return -ENOMEM; |
| 994 | if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) { |
| 995 | kfree(isopkt); |
| 996 | return -EFAULT; |
| 997 | } |
| 998 | for (totlen = u = 0; u < uurb->number_of_packets; u++) { |
| 999 | /* arbitrary limit, sufficient for USB 2.0 high-bandwidth iso */ |
| 1000 | if (isopkt[u].length > 8192) { |
| 1001 | kfree(isopkt); |
| 1002 | return -EINVAL; |
| 1003 | } |
| 1004 | totlen += isopkt[u].length; |
| 1005 | } |
| 1006 | if (totlen > 32768) { |
| 1007 | kfree(isopkt); |
| 1008 | return -EINVAL; |
| 1009 | } |
| 1010 | uurb->buffer_length = totlen; |
| 1011 | snoop(&ps->dev->dev, "iso urb\n"); |
| 1012 | break; |
| 1013 | |
| 1014 | case USBDEVFS_URB_TYPE_INTERRUPT: |
| 1015 | uurb->number_of_packets = 0; |
| 1016 | if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) |
| 1017 | != USB_ENDPOINT_XFER_INT) |
| 1018 | return -EINVAL; |
| 1019 | if (ps->dev->speed == USB_SPEED_HIGH) |
| 1020 | interval = 1 << min (15, ep->desc.bInterval - 1); |
| 1021 | else |
| 1022 | interval = ep->desc.bInterval; |
| 1023 | if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE) |
| 1024 | return -EINVAL; |
| 1025 | if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) |
| 1026 | return -EFAULT; |
| 1027 | snoop(&ps->dev->dev, "interrupt urb\n"); |
| 1028 | break; |
| 1029 | |
| 1030 | default: |
| 1031 | return -EINVAL; |
| 1032 | } |
| 1033 | if (!(as = alloc_async(uurb->number_of_packets))) { |
| 1034 | kfree(isopkt); |
| 1035 | kfree(dr); |
| 1036 | return -ENOMEM; |
| 1037 | } |
| 1038 | if (!(as->urb->transfer_buffer = kmalloc(uurb->buffer_length, GFP_KERNEL))) { |
| 1039 | kfree(isopkt); |
| 1040 | kfree(dr); |
| 1041 | free_async(as); |
| 1042 | return -ENOMEM; |
| 1043 | } |
| 1044 | as->urb->dev = ps->dev; |
| 1045 | as->urb->pipe = (uurb->type << 30) | __create_pipe(ps->dev, uurb->endpoint & 0xf) | (uurb->endpoint & USB_DIR_IN); |
| 1046 | as->urb->transfer_flags = uurb->flags; |
| 1047 | as->urb->transfer_buffer_length = uurb->buffer_length; |
| 1048 | as->urb->setup_packet = (unsigned char*)dr; |
| 1049 | as->urb->start_frame = uurb->start_frame; |
| 1050 | as->urb->number_of_packets = uurb->number_of_packets; |
| 1051 | as->urb->interval = interval; |
| 1052 | as->urb->context = as; |
| 1053 | as->urb->complete = async_completed; |
| 1054 | for (totlen = u = 0; u < uurb->number_of_packets; u++) { |
| 1055 | as->urb->iso_frame_desc[u].offset = totlen; |
| 1056 | as->urb->iso_frame_desc[u].length = isopkt[u].length; |
| 1057 | totlen += isopkt[u].length; |
| 1058 | } |
| 1059 | kfree(isopkt); |
| 1060 | as->ps = ps; |
| 1061 | as->userurb = arg; |
| 1062 | if (uurb->endpoint & USB_DIR_IN) |
| 1063 | as->userbuffer = uurb->buffer; |
| 1064 | else |
| 1065 | as->userbuffer = NULL; |
| 1066 | as->signr = uurb->signr; |
| 1067 | as->ifnum = ifnum; |
| 1068 | as->pid = get_pid(task_pid(current)); |
| 1069 | as->uid = current->uid; |
| 1070 | as->euid = current->euid; |
| 1071 | security_task_getsecid(current, &as->secid); |
| 1072 | if (!(uurb->endpoint & USB_DIR_IN)) { |
| 1073 | if (copy_from_user(as->urb->transfer_buffer, uurb->buffer, as->urb->transfer_buffer_length)) { |
| 1074 | free_async(as); |
| 1075 | return -EFAULT; |
| 1076 | } |
| 1077 | } |
| 1078 | snoop(&as->urb->dev->dev, "submit urb\n"); |
| 1079 | snoop_urb(as->urb, as->userurb); |
| 1080 | async_newpending(as); |
| 1081 | if ((ret = usb_submit_urb(as->urb, GFP_KERNEL))) { |
| 1082 | dev_printk(KERN_DEBUG, &ps->dev->dev, "usbfs: usb_submit_urb returned %d\n", ret); |
| 1083 | async_removepending(as); |
| 1084 | free_async(as); |
| 1085 | return ret; |
| 1086 | } |
| 1087 | return 0; |
| 1088 | } |
| 1089 | |
| 1090 | static int proc_submiturb(struct dev_state *ps, void __user *arg) |
| 1091 | { |
| 1092 | struct usbdevfs_urb uurb; |
| 1093 | |
| 1094 | if (copy_from_user(&uurb, arg, sizeof(uurb))) |
| 1095 | return -EFAULT; |
| 1096 | |
| 1097 | return proc_do_submiturb(ps, &uurb, (((struct usbdevfs_urb __user *)arg)->iso_frame_desc), arg); |
| 1098 | } |
| 1099 | |
| 1100 | static int proc_unlinkurb(struct dev_state *ps, void __user *arg) |
| 1101 | { |
| 1102 | struct async *as; |
| 1103 | |
| 1104 | as = async_getpending(ps, arg); |
| 1105 | if (!as) |
| 1106 | return -EINVAL; |
| 1107 | usb_kill_urb(as->urb); |
| 1108 | return 0; |
| 1109 | } |
| 1110 | |
| 1111 | static int processcompl(struct async *as, void __user * __user *arg) |
| 1112 | { |
| 1113 | struct urb *urb = as->urb; |
| 1114 | struct usbdevfs_urb __user *userurb = as->userurb; |
| 1115 | void __user *addr = as->userurb; |
| 1116 | unsigned int i; |
| 1117 | |
| 1118 | if (as->userbuffer) |
| 1119 | if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length)) |
| 1120 | return -EFAULT; |
| 1121 | if (put_user(urb->status, &userurb->status)) |
| 1122 | return -EFAULT; |
| 1123 | if (put_user(urb->actual_length, &userurb->actual_length)) |
| 1124 | return -EFAULT; |
| 1125 | if (put_user(urb->error_count, &userurb->error_count)) |
| 1126 | return -EFAULT; |
| 1127 | |
| 1128 | if (usb_pipeisoc(urb->pipe)) { |
| 1129 | for (i = 0; i < urb->number_of_packets; i++) { |
| 1130 | if (put_user(urb->iso_frame_desc[i].actual_length, |
| 1131 | &userurb->iso_frame_desc[i].actual_length)) |
| 1132 | return -EFAULT; |
| 1133 | if (put_user(urb->iso_frame_desc[i].status, |
| 1134 | &userurb->iso_frame_desc[i].status)) |
| 1135 | return -EFAULT; |
| 1136 | } |
| 1137 | } |
| 1138 | |
| 1139 | free_async(as); |
| 1140 | |
| 1141 | if (put_user(addr, (void __user * __user *)arg)) |
| 1142 | return -EFAULT; |
| 1143 | return 0; |
| 1144 | } |
| 1145 | |
| 1146 | static struct async* reap_as(struct dev_state *ps) |
| 1147 | { |
| 1148 | DECLARE_WAITQUEUE(wait, current); |
| 1149 | struct async *as = NULL; |
| 1150 | struct usb_device *dev = ps->dev; |
| 1151 | |
| 1152 | add_wait_queue(&ps->wait, &wait); |
| 1153 | for (;;) { |
| 1154 | __set_current_state(TASK_INTERRUPTIBLE); |
| 1155 | if ((as = async_getcompleted(ps))) |
| 1156 | break; |
| 1157 | if (signal_pending(current)) |
| 1158 | break; |
| 1159 | usb_unlock_device(dev); |
| 1160 | schedule(); |
| 1161 | usb_lock_device(dev); |
| 1162 | } |
| 1163 | remove_wait_queue(&ps->wait, &wait); |
| 1164 | set_current_state(TASK_RUNNING); |
| 1165 | return as; |
| 1166 | } |
| 1167 | |
| 1168 | static int proc_reapurb(struct dev_state *ps, void __user *arg) |
| 1169 | { |
| 1170 | struct async *as = reap_as(ps); |
| 1171 | if (as) |
| 1172 | return processcompl(as, (void __user * __user *)arg); |
| 1173 | if (signal_pending(current)) |
| 1174 | return -EINTR; |
| 1175 | return -EIO; |
| 1176 | } |
| 1177 | |
| 1178 | static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg) |
| 1179 | { |
| 1180 | struct async *as; |
| 1181 | |
| 1182 | if (!(as = async_getcompleted(ps))) |
| 1183 | return -EAGAIN; |
| 1184 | return processcompl(as, (void __user * __user *)arg); |
| 1185 | } |
| 1186 | |
| 1187 | #ifdef CONFIG_COMPAT |
| 1188 | |
| 1189 | static int get_urb32(struct usbdevfs_urb *kurb, |
| 1190 | struct usbdevfs_urb32 __user *uurb) |
| 1191 | { |
| 1192 | __u32 uptr; |
| 1193 | if (get_user(kurb->type, &uurb->type) || |
| 1194 | __get_user(kurb->endpoint, &uurb->endpoint) || |
| 1195 | __get_user(kurb->status, &uurb->status) || |
| 1196 | __get_user(kurb->flags, &uurb->flags) || |
| 1197 | __get_user(kurb->buffer_length, &uurb->buffer_length) || |
| 1198 | __get_user(kurb->actual_length, &uurb->actual_length) || |
| 1199 | __get_user(kurb->start_frame, &uurb->start_frame) || |
| 1200 | __get_user(kurb->number_of_packets, &uurb->number_of_packets) || |
| 1201 | __get_user(kurb->error_count, &uurb->error_count) || |
| 1202 | __get_user(kurb->signr, &uurb->signr)) |
| 1203 | return -EFAULT; |
| 1204 | |
| 1205 | if (__get_user(uptr, &uurb->buffer)) |
| 1206 | return -EFAULT; |
| 1207 | kurb->buffer = compat_ptr(uptr); |
| 1208 | if (__get_user(uptr, &uurb->buffer)) |
| 1209 | return -EFAULT; |
| 1210 | kurb->usercontext = compat_ptr(uptr); |
| 1211 | |
| 1212 | return 0; |
| 1213 | } |
| 1214 | |
| 1215 | static int proc_submiturb_compat(struct dev_state *ps, void __user *arg) |
| 1216 | { |
| 1217 | struct usbdevfs_urb uurb; |
| 1218 | |
| 1219 | if (get_urb32(&uurb,(struct usbdevfs_urb32 __user *)arg)) |
| 1220 | return -EFAULT; |
| 1221 | |
| 1222 | return proc_do_submiturb(ps, &uurb, ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc, arg); |
| 1223 | } |
| 1224 | |
| 1225 | static int processcompl_compat(struct async *as, void __user * __user *arg) |
| 1226 | { |
| 1227 | struct urb *urb = as->urb; |
| 1228 | struct usbdevfs_urb32 __user *userurb = as->userurb; |
| 1229 | void __user *addr = as->userurb; |
| 1230 | unsigned int i; |
| 1231 | |
| 1232 | if (as->userbuffer) |
| 1233 | if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length)) |
| 1234 | return -EFAULT; |
| 1235 | if (put_user(urb->status, &userurb->status)) |
| 1236 | return -EFAULT; |
| 1237 | if (put_user(urb->actual_length, &userurb->actual_length)) |
| 1238 | return -EFAULT; |
| 1239 | if (put_user(urb->error_count, &userurb->error_count)) |
| 1240 | return -EFAULT; |
| 1241 | |
| 1242 | if (usb_pipeisoc(urb->pipe)) { |
| 1243 | for (i = 0; i < urb->number_of_packets; i++) { |
| 1244 | if (put_user(urb->iso_frame_desc[i].actual_length, |
| 1245 | &userurb->iso_frame_desc[i].actual_length)) |
| 1246 | return -EFAULT; |
| 1247 | if (put_user(urb->iso_frame_desc[i].status, |
| 1248 | &userurb->iso_frame_desc[i].status)) |
| 1249 | return -EFAULT; |
| 1250 | } |
| 1251 | } |
| 1252 | |
| 1253 | free_async(as); |
| 1254 | if (put_user(ptr_to_compat(addr), (u32 __user *)arg)) |
| 1255 | return -EFAULT; |
| 1256 | return 0; |
| 1257 | } |
| 1258 | |
| 1259 | static int proc_reapurb_compat(struct dev_state *ps, void __user *arg) |
| 1260 | { |
| 1261 | struct async *as = reap_as(ps); |
| 1262 | if (as) |
| 1263 | return processcompl_compat(as, (void __user * __user *)arg); |
| 1264 | if (signal_pending(current)) |
| 1265 | return -EINTR; |
| 1266 | return -EIO; |
| 1267 | } |
| 1268 | |
| 1269 | static int proc_reapurbnonblock_compat(struct dev_state *ps, void __user *arg) |
| 1270 | { |
| 1271 | struct async *as; |
| 1272 | |
| 1273 | if (!(as = async_getcompleted(ps))) |
| 1274 | return -EAGAIN; |
| 1275 | return processcompl_compat(as, (void __user * __user *)arg); |
| 1276 | } |
| 1277 | |
| 1278 | #endif |
| 1279 | |
| 1280 | static int proc_disconnectsignal(struct dev_state *ps, void __user *arg) |
| 1281 | { |
| 1282 | struct usbdevfs_disconnectsignal ds; |
| 1283 | |
| 1284 | if (copy_from_user(&ds, arg, sizeof(ds))) |
| 1285 | return -EFAULT; |
| 1286 | if (ds.signr != 0 && (ds.signr < SIGRTMIN || ds.signr > SIGRTMAX)) |
| 1287 | return -EINVAL; |
| 1288 | ps->discsignr = ds.signr; |
| 1289 | ps->disccontext = ds.context; |
| 1290 | return 0; |
| 1291 | } |
| 1292 | |
| 1293 | static int proc_claiminterface(struct dev_state *ps, void __user *arg) |
| 1294 | { |
| 1295 | unsigned int ifnum; |
| 1296 | |
| 1297 | if (get_user(ifnum, (unsigned int __user *)arg)) |
| 1298 | return -EFAULT; |
| 1299 | return claimintf(ps, ifnum); |
| 1300 | } |
| 1301 | |
| 1302 | static int proc_releaseinterface(struct dev_state *ps, void __user *arg) |
| 1303 | { |
| 1304 | unsigned int ifnum; |
| 1305 | int ret; |
| 1306 | |
| 1307 | if (get_user(ifnum, (unsigned int __user *)arg)) |
| 1308 | return -EFAULT; |
| 1309 | if ((ret = releaseintf(ps, ifnum)) < 0) |
| 1310 | return ret; |
| 1311 | destroy_async_on_interface (ps, ifnum); |
| 1312 | return 0; |
| 1313 | } |
| 1314 | |
| 1315 | static int proc_ioctl(struct dev_state *ps, struct usbdevfs_ioctl *ctl) |
| 1316 | { |
| 1317 | int size; |
| 1318 | void *buf = NULL; |
| 1319 | int retval = 0; |
| 1320 | struct usb_interface *intf = NULL; |
| 1321 | struct usb_driver *driver = NULL; |
| 1322 | |
| 1323 | /* alloc buffer */ |
| 1324 | if ((size = _IOC_SIZE (ctl->ioctl_code)) > 0) { |
| 1325 | if ((buf = kmalloc (size, GFP_KERNEL)) == NULL) |
| 1326 | return -ENOMEM; |
| 1327 | if ((_IOC_DIR(ctl->ioctl_code) & _IOC_WRITE)) { |
| 1328 | if (copy_from_user (buf, ctl->data, size)) { |
| 1329 | kfree(buf); |
| 1330 | return -EFAULT; |
| 1331 | } |
| 1332 | } else { |
| 1333 | memset (buf, 0, size); |
| 1334 | } |
| 1335 | } |
| 1336 | |
| 1337 | if (!connected(ps)) { |
| 1338 | kfree(buf); |
| 1339 | return -ENODEV; |
| 1340 | } |
| 1341 | |
| 1342 | if (ps->dev->state != USB_STATE_CONFIGURED) |
| 1343 | retval = -EHOSTUNREACH; |
| 1344 | else if (!(intf = usb_ifnum_to_if (ps->dev, ctl->ifno))) |
| 1345 | retval = -EINVAL; |
| 1346 | else switch (ctl->ioctl_code) { |
| 1347 | |
| 1348 | /* disconnect kernel driver from interface */ |
| 1349 | case USBDEVFS_DISCONNECT: |
| 1350 | |
| 1351 | down_write(&usb_bus_type.subsys.rwsem); |
| 1352 | if (intf->dev.driver) { |
| 1353 | driver = to_usb_driver(intf->dev.driver); |
| 1354 | dev_dbg (&intf->dev, "disconnect by usbfs\n"); |
| 1355 | usb_driver_release_interface(driver, intf); |
| 1356 | } else |
| 1357 | retval = -ENODATA; |
| 1358 | up_write(&usb_bus_type.subsys.rwsem); |
| 1359 | break; |
| 1360 | |
| 1361 | /* let kernel drivers try to (re)bind to the interface */ |
| 1362 | case USBDEVFS_CONNECT: |
| 1363 | usb_unlock_device(ps->dev); |
| 1364 | retval = bus_rescan_devices(intf->dev.bus); |
| 1365 | usb_lock_device(ps->dev); |
| 1366 | break; |
| 1367 | |
| 1368 | /* talk directly to the interface's driver */ |
| 1369 | default: |
| 1370 | down_read(&usb_bus_type.subsys.rwsem); |
| 1371 | if (intf->dev.driver) |
| 1372 | driver = to_usb_driver(intf->dev.driver); |
| 1373 | if (driver == NULL || driver->ioctl == NULL) { |
| 1374 | retval = -ENOTTY; |
| 1375 | } else { |
| 1376 | retval = driver->ioctl (intf, ctl->ioctl_code, buf); |
| 1377 | if (retval == -ENOIOCTLCMD) |
| 1378 | retval = -ENOTTY; |
| 1379 | } |
| 1380 | up_read(&usb_bus_type.subsys.rwsem); |
| 1381 | } |
| 1382 | |
| 1383 | /* cleanup and return */ |
| 1384 | if (retval >= 0 |
| 1385 | && (_IOC_DIR (ctl->ioctl_code) & _IOC_READ) != 0 |
| 1386 | && size > 0 |
| 1387 | && copy_to_user (ctl->data, buf, size) != 0) |
| 1388 | retval = -EFAULT; |
| 1389 | |
| 1390 | kfree(buf); |
| 1391 | return retval; |
| 1392 | } |
| 1393 | |
| 1394 | static int proc_ioctl_default(struct dev_state *ps, void __user *arg) |
| 1395 | { |
| 1396 | struct usbdevfs_ioctl ctrl; |
| 1397 | |
| 1398 | if (copy_from_user(&ctrl, arg, sizeof (ctrl))) |
| 1399 | return -EFAULT; |
| 1400 | return proc_ioctl(ps, &ctrl); |
| 1401 | } |
| 1402 | |
| 1403 | #ifdef CONFIG_COMPAT |
| 1404 | static int proc_ioctl_compat(struct dev_state *ps, compat_uptr_t arg) |
| 1405 | { |
| 1406 | struct usbdevfs_ioctl32 __user *uioc; |
| 1407 | struct usbdevfs_ioctl ctrl; |
| 1408 | u32 udata; |
| 1409 | |
| 1410 | uioc = compat_ptr((long)arg); |
| 1411 | if (get_user(ctrl.ifno, &uioc->ifno) || |
| 1412 | get_user(ctrl.ioctl_code, &uioc->ioctl_code) || |
| 1413 | __get_user(udata, &uioc->data)) |
| 1414 | return -EFAULT; |
| 1415 | ctrl.data = compat_ptr(udata); |
| 1416 | |
| 1417 | return proc_ioctl(ps, &ctrl); |
| 1418 | } |
| 1419 | #endif |
| 1420 | |
| 1421 | /* |
| 1422 | * NOTE: All requests here that have interface numbers as parameters |
| 1423 | * are assuming that somehow the configuration has been prevented from |
| 1424 | * changing. But there's no mechanism to ensure that... |
| 1425 | */ |
| 1426 | static int usbdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) |
| 1427 | { |
| 1428 | struct dev_state *ps = file->private_data; |
| 1429 | struct usb_device *dev = ps->dev; |
| 1430 | void __user *p = (void __user *)arg; |
| 1431 | int ret = -ENOTTY; |
| 1432 | |
| 1433 | if (!(file->f_mode & FMODE_WRITE)) |
| 1434 | return -EPERM; |
| 1435 | usb_lock_device(dev); |
| 1436 | if (!connected(ps)) { |
| 1437 | usb_unlock_device(dev); |
| 1438 | return -ENODEV; |
| 1439 | } |
| 1440 | |
| 1441 | switch (cmd) { |
| 1442 | case USBDEVFS_CONTROL: |
| 1443 | snoop(&dev->dev, "%s: CONTROL\n", __FUNCTION__); |
| 1444 | ret = proc_control(ps, p); |
| 1445 | if (ret >= 0) |
| 1446 | inode->i_mtime = CURRENT_TIME; |
| 1447 | break; |
| 1448 | |
| 1449 | case USBDEVFS_BULK: |
| 1450 | snoop(&dev->dev, "%s: BULK\n", __FUNCTION__); |
| 1451 | ret = proc_bulk(ps, p); |
| 1452 | if (ret >= 0) |
| 1453 | inode->i_mtime = CURRENT_TIME; |
| 1454 | break; |
| 1455 | |
| 1456 | case USBDEVFS_RESETEP: |
| 1457 | snoop(&dev->dev, "%s: RESETEP\n", __FUNCTION__); |
| 1458 | ret = proc_resetep(ps, p); |
| 1459 | if (ret >= 0) |
| 1460 | inode->i_mtime = CURRENT_TIME; |
| 1461 | break; |
| 1462 | |
| 1463 | case USBDEVFS_RESET: |
| 1464 | snoop(&dev->dev, "%s: RESET\n", __FUNCTION__); |
| 1465 | ret = proc_resetdevice(ps); |
| 1466 | break; |
| 1467 | |
| 1468 | case USBDEVFS_CLEAR_HALT: |
| 1469 | snoop(&dev->dev, "%s: CLEAR_HALT\n", __FUNCTION__); |
| 1470 | ret = proc_clearhalt(ps, p); |
| 1471 | if (ret >= 0) |
| 1472 | inode->i_mtime = CURRENT_TIME; |
| 1473 | break; |
| 1474 | |
| 1475 | case USBDEVFS_GETDRIVER: |
| 1476 | snoop(&dev->dev, "%s: GETDRIVER\n", __FUNCTION__); |
| 1477 | ret = proc_getdriver(ps, p); |
| 1478 | break; |
| 1479 | |
| 1480 | case USBDEVFS_CONNECTINFO: |
| 1481 | snoop(&dev->dev, "%s: CONNECTINFO\n", __FUNCTION__); |
| 1482 | ret = proc_connectinfo(ps, p); |
| 1483 | break; |
| 1484 | |
| 1485 | case USBDEVFS_SETINTERFACE: |
| 1486 | snoop(&dev->dev, "%s: SETINTERFACE\n", __FUNCTION__); |
| 1487 | ret = proc_setintf(ps, p); |
| 1488 | break; |
| 1489 | |
| 1490 | case USBDEVFS_SETCONFIGURATION: |
| 1491 | snoop(&dev->dev, "%s: SETCONFIGURATION\n", __FUNCTION__); |
| 1492 | ret = proc_setconfig(ps, p); |
| 1493 | break; |
| 1494 | |
| 1495 | case USBDEVFS_SUBMITURB: |
| 1496 | snoop(&dev->dev, "%s: SUBMITURB\n", __FUNCTION__); |
| 1497 | ret = proc_submiturb(ps, p); |
| 1498 | if (ret >= 0) |
| 1499 | inode->i_mtime = CURRENT_TIME; |
| 1500 | break; |
| 1501 | |
| 1502 | #ifdef CONFIG_COMPAT |
| 1503 | |
| 1504 | case USBDEVFS_SUBMITURB32: |
| 1505 | snoop(&dev->dev, "%s: SUBMITURB32\n", __FUNCTION__); |
| 1506 | ret = proc_submiturb_compat(ps, p); |
| 1507 | if (ret >= 0) |
| 1508 | inode->i_mtime = CURRENT_TIME; |
| 1509 | break; |
| 1510 | |
| 1511 | case USBDEVFS_REAPURB32: |
| 1512 | snoop(&dev->dev, "%s: REAPURB32\n", __FUNCTION__); |
| 1513 | ret = proc_reapurb_compat(ps, p); |
| 1514 | break; |
| 1515 | |
| 1516 | case USBDEVFS_REAPURBNDELAY32: |
| 1517 | snoop(&dev->dev, "%s: REAPURBDELAY32\n", __FUNCTION__); |
| 1518 | ret = proc_reapurbnonblock_compat(ps, p); |
| 1519 | break; |
| 1520 | |
| 1521 | case USBDEVFS_IOCTL32: |
| 1522 | snoop(&dev->dev, "%s: IOCTL\n", __FUNCTION__); |
| 1523 | ret = proc_ioctl_compat(ps, ptr_to_compat(p)); |
| 1524 | break; |
| 1525 | #endif |
| 1526 | |
| 1527 | case USBDEVFS_DISCARDURB: |
| 1528 | snoop(&dev->dev, "%s: DISCARDURB\n", __FUNCTION__); |
| 1529 | ret = proc_unlinkurb(ps, p); |
| 1530 | break; |
| 1531 | |
| 1532 | case USBDEVFS_REAPURB: |
| 1533 | snoop(&dev->dev, "%s: REAPURB\n", __FUNCTION__); |
| 1534 | ret = proc_reapurb(ps, p); |
| 1535 | break; |
| 1536 | |
| 1537 | case USBDEVFS_REAPURBNDELAY: |
| 1538 | snoop(&dev->dev, "%s: REAPURBDELAY\n", __FUNCTION__); |
| 1539 | ret = proc_reapurbnonblock(ps, p); |
| 1540 | break; |
| 1541 | |
| 1542 | case USBDEVFS_DISCSIGNAL: |
| 1543 | snoop(&dev->dev, "%s: DISCSIGNAL\n", __FUNCTION__); |
| 1544 | ret = proc_disconnectsignal(ps, p); |
| 1545 | break; |
| 1546 | |
| 1547 | case USBDEVFS_CLAIMINTERFACE: |
| 1548 | snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __FUNCTION__); |
| 1549 | ret = proc_claiminterface(ps, p); |
| 1550 | break; |
| 1551 | |
| 1552 | case USBDEVFS_RELEASEINTERFACE: |
| 1553 | snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __FUNCTION__); |
| 1554 | ret = proc_releaseinterface(ps, p); |
| 1555 | break; |
| 1556 | |
| 1557 | case USBDEVFS_IOCTL: |
| 1558 | snoop(&dev->dev, "%s: IOCTL\n", __FUNCTION__); |
| 1559 | ret = proc_ioctl_default(ps, p); |
| 1560 | break; |
| 1561 | } |
| 1562 | usb_unlock_device(dev); |
| 1563 | if (ret >= 0) |
| 1564 | inode->i_atime = CURRENT_TIME; |
| 1565 | return ret; |
| 1566 | } |
| 1567 | |
| 1568 | /* No kernel lock - fine */ |
| 1569 | static unsigned int usbdev_poll(struct file *file, struct poll_table_struct *wait) |
| 1570 | { |
| 1571 | struct dev_state *ps = file->private_data; |
| 1572 | unsigned int mask = 0; |
| 1573 | |
| 1574 | poll_wait(file, &ps->wait, wait); |
| 1575 | if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed)) |
| 1576 | mask |= POLLOUT | POLLWRNORM; |
| 1577 | if (!connected(ps)) |
| 1578 | mask |= POLLERR | POLLHUP; |
| 1579 | return mask; |
| 1580 | } |
| 1581 | |
| 1582 | const struct file_operations usbfs_device_file_operations = { |
| 1583 | .llseek = usbdev_lseek, |
| 1584 | .read = usbdev_read, |
| 1585 | .poll = usbdev_poll, |
| 1586 | .ioctl = usbdev_ioctl, |
| 1587 | .open = usbdev_open, |
| 1588 | .release = usbdev_release, |
| 1589 | }; |
| 1590 | |
| 1591 | static int usbdev_add(struct usb_device *dev) |
| 1592 | { |
| 1593 | int minor = ((dev->bus->busnum-1) * 128) + (dev->devnum-1); |
| 1594 | |
| 1595 | dev->class_dev = class_device_create(usb_device_class, NULL, |
| 1596 | MKDEV(USB_DEVICE_MAJOR, minor), &dev->dev, |
| 1597 | "usbdev%d.%d", dev->bus->busnum, dev->devnum); |
| 1598 | if (IS_ERR(dev->class_dev)) |
| 1599 | return PTR_ERR(dev->class_dev); |
| 1600 | |
| 1601 | dev->class_dev->class_data = dev; |
| 1602 | return 0; |
| 1603 | } |
| 1604 | |
| 1605 | static void usbdev_remove(struct usb_device *dev) |
| 1606 | { |
| 1607 | class_device_unregister(dev->class_dev); |
| 1608 | } |
| 1609 | |
| 1610 | static int usbdev_notify(struct notifier_block *self, unsigned long action, |
| 1611 | void *dev) |
| 1612 | { |
| 1613 | switch (action) { |
| 1614 | case USB_DEVICE_ADD: |
| 1615 | if (usbdev_add(dev)) |
| 1616 | return NOTIFY_BAD; |
| 1617 | break; |
| 1618 | case USB_DEVICE_REMOVE: |
| 1619 | usbdev_remove(dev); |
| 1620 | break; |
| 1621 | } |
| 1622 | return NOTIFY_OK; |
| 1623 | } |
| 1624 | |
| 1625 | static struct notifier_block usbdev_nb = { |
| 1626 | .notifier_call = usbdev_notify, |
| 1627 | }; |
| 1628 | |
| 1629 | static struct cdev usb_device_cdev = { |
| 1630 | .kobj = {.name = "usb_device", }, |
| 1631 | .owner = THIS_MODULE, |
| 1632 | }; |
| 1633 | |
| 1634 | int __init usbdev_init(void) |
| 1635 | { |
| 1636 | int retval; |
| 1637 | |
| 1638 | retval = register_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX, |
| 1639 | "usb_device"); |
| 1640 | if (retval) { |
| 1641 | err("unable to register minors for usb_device"); |
| 1642 | goto out; |
| 1643 | } |
| 1644 | cdev_init(&usb_device_cdev, &usbfs_device_file_operations); |
| 1645 | retval = cdev_add(&usb_device_cdev, USB_DEVICE_DEV, USB_DEVICE_MAX); |
| 1646 | if (retval) { |
| 1647 | err("unable to get usb_device major %d", USB_DEVICE_MAJOR); |
| 1648 | goto error_cdev; |
| 1649 | } |
| 1650 | usb_device_class = class_create(THIS_MODULE, "usb_device"); |
| 1651 | if (IS_ERR(usb_device_class)) { |
| 1652 | err("unable to register usb_device class"); |
| 1653 | retval = PTR_ERR(usb_device_class); |
| 1654 | goto error_class; |
| 1655 | } |
| 1656 | |
| 1657 | usb_register_notify(&usbdev_nb); |
| 1658 | |
| 1659 | out: |
| 1660 | return retval; |
| 1661 | |
| 1662 | error_class: |
| 1663 | usb_device_class = NULL; |
| 1664 | cdev_del(&usb_device_cdev); |
| 1665 | |
| 1666 | error_cdev: |
| 1667 | unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX); |
| 1668 | goto out; |
| 1669 | } |
| 1670 | |
| 1671 | void usbdev_cleanup(void) |
| 1672 | { |
| 1673 | usb_unregister_notify(&usbdev_nb); |
| 1674 | class_destroy(usb_device_class); |
| 1675 | cdev_del(&usb_device_cdev); |
| 1676 | unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX); |
| 1677 | } |
| 1678 | |