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Commit | Line | Data |
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1da177e4 LT |
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 | * | |
1da177e4 LT |
22 | * This file implements the usbfs/x/y files, where |
23 | * x is the bus number and y the device number. | |
24 | * | |
25 | * It allows user space programs/"drivers" to communicate directly | |
26 | * with USB devices without intervening kernel driver. | |
27 | * | |
28 | * Revision history | |
29 | * 22.12.1999 0.1 Initial release (split from proc_usb.c) | |
30 | * 04.01.2000 0.2 Turned into its own filesystem | |
46113830 HW |
31 | * 30.09.2005 0.3 Fix user-triggerable oops in async URB delivery |
32 | * (CAN-2005-3055) | |
1da177e4 LT |
33 | */ |
34 | ||
35 | /*****************************************************************************/ | |
36 | ||
37 | #include <linux/fs.h> | |
38 | #include <linux/mm.h> | |
39 | #include <linux/slab.h> | |
1da177e4 LT |
40 | #include <linux/signal.h> |
41 | #include <linux/poll.h> | |
42 | #include <linux/module.h> | |
b11b2e1b | 43 | #include <linux/string.h> |
1da177e4 LT |
44 | #include <linux/usb.h> |
45 | #include <linux/usbdevice_fs.h> | |
27729aad | 46 | #include <linux/usb/hcd.h> /* for usbcore internals */ |
fbf82fd2 | 47 | #include <linux/cdev.h> |
a7b986b3 | 48 | #include <linux/notifier.h> |
7a01955f | 49 | #include <linux/security.h> |
d178bc3a | 50 | #include <linux/user_namespace.h> |
3d97ff63 | 51 | #include <linux/scatterlist.h> |
e6889b31 | 52 | #include <linux/uaccess.h> |
f7d34b44 | 53 | #include <linux/dma-mapping.h> |
1da177e4 LT |
54 | #include <asm/byteorder.h> |
55 | #include <linux/moduleparam.h> | |
56 | ||
1da177e4 LT |
57 | #include "usb.h" |
58 | ||
fbf82fd2 | 59 | #define USB_MAXBUS 64 |
fa86ad0b | 60 | #define USB_DEVICE_MAX (USB_MAXBUS * 128) |
3d97ff63 | 61 | #define USB_SG_SIZE 16384 /* split-size for large txs */ |
fbf82fd2 | 62 | |
4a2a8a2c AS |
63 | /* Mutual exclusion for removal, open, and release */ |
64 | DEFINE_MUTEX(usbfs_mutex); | |
65 | ||
9b6f0c4b | 66 | struct usb_dev_state { |
cd9f0375 AS |
67 | struct list_head list; /* state list */ |
68 | struct usb_device *dev; | |
69 | struct file *file; | |
70 | spinlock_t lock; /* protects the async urb lists */ | |
71 | struct list_head async_pending; | |
72 | struct list_head async_completed; | |
f7d34b44 | 73 | struct list_head memory_list; |
cd9f0375 AS |
74 | wait_queue_head_t wait; /* wake up if a request completed */ |
75 | unsigned int discsignr; | |
76 | struct pid *disc_pid; | |
d178bc3a | 77 | const struct cred *cred; |
cd9f0375 AS |
78 | void __user *disccontext; |
79 | unsigned long ifclaimed; | |
80 | u32 secid; | |
01c6460f | 81 | u32 disabled_bulk_eps; |
d883f52e RG |
82 | bool privileges_dropped; |
83 | unsigned long interface_allowed_mask; | |
cd9f0375 AS |
84 | }; |
85 | ||
f7d34b44 SG |
86 | struct usb_memory { |
87 | struct list_head memlist; | |
88 | int vma_use_count; | |
89 | int urb_use_count; | |
90 | u32 size; | |
91 | void *mem; | |
92 | dma_addr_t dma_handle; | |
93 | unsigned long vm_start; | |
94 | struct usb_dev_state *ps; | |
95 | }; | |
96 | ||
1da177e4 LT |
97 | struct async { |
98 | struct list_head asynclist; | |
9b6f0c4b | 99 | struct usb_dev_state *ps; |
2425c08b | 100 | struct pid *pid; |
d178bc3a | 101 | const struct cred *cred; |
1da177e4 LT |
102 | unsigned int signr; |
103 | unsigned int ifnum; | |
104 | void __user *userbuffer; | |
105 | void __user *userurb; | |
106 | struct urb *urb; | |
f7d34b44 | 107 | struct usb_memory *usbm; |
add1aaea | 108 | unsigned int mem_usage; |
e015268d | 109 | int status; |
7a01955f | 110 | u32 secid; |
01c6460f AS |
111 | u8 bulk_addr; |
112 | u8 bulk_status; | |
1da177e4 LT |
113 | }; |
114 | ||
90ab5ee9 | 115 | static bool usbfs_snoop; |
04e482ff GKH |
116 | module_param(usbfs_snoop, bool, S_IRUGO | S_IWUSR); |
117 | MODULE_PARM_DESC(usbfs_snoop, "true to log all usbfs traffic"); | |
1da177e4 | 118 | |
0290cc9f AS |
119 | static unsigned usbfs_snoop_max = 65536; |
120 | module_param(usbfs_snoop_max, uint, S_IRUGO | S_IWUSR); | |
121 | MODULE_PARM_DESC(usbfs_snoop_max, | |
122 | "maximum number of bytes to print while snooping"); | |
123 | ||
1da177e4 LT |
124 | #define snoop(dev, format, arg...) \ |
125 | do { \ | |
126 | if (usbfs_snoop) \ | |
f355e830 | 127 | dev_info(dev, format, ## arg); \ |
1da177e4 LT |
128 | } while (0) |
129 | ||
4c6e8971 AS |
130 | enum snoop_when { |
131 | SUBMIT, COMPLETE | |
132 | }; | |
fad21bdf | 133 | |
4c6e8971 | 134 | #define USB_DEVICE_DEV MKDEV(USB_DEVICE_MAJOR, 0) |
1da177e4 | 135 | |
add1aaea | 136 | /* Limit on the total amount of memory we can allocate for transfers */ |
3f5eb8d5 AS |
137 | static unsigned usbfs_memory_mb = 16; |
138 | module_param(usbfs_memory_mb, uint, 0644); | |
139 | MODULE_PARM_DESC(usbfs_memory_mb, | |
140 | "maximum MB allowed for usbfs buffers (0 = no limit)"); | |
141 | ||
025d4430 | 142 | /* Hard limit, necessary to avoid arithmetic overflow */ |
3f5eb8d5 | 143 | #define USBFS_XFER_MAX (UINT_MAX / 2 - 1000000) |
1da177e4 | 144 | |
add1aaea AS |
145 | static atomic_t usbfs_memory_usage; /* Total memory currently allocated */ |
146 | ||
147 | /* Check whether it's okay to allocate more memory for a transfer */ | |
148 | static int usbfs_increase_memory_usage(unsigned amount) | |
149 | { | |
3f5eb8d5 AS |
150 | unsigned lim; |
151 | ||
152 | /* | |
153 | * Convert usbfs_memory_mb to bytes, avoiding overflows. | |
154 | * 0 means use the hard limit (effectively unlimited). | |
155 | */ | |
156 | lim = ACCESS_ONCE(usbfs_memory_mb); | |
157 | if (lim == 0 || lim > (USBFS_XFER_MAX >> 20)) | |
158 | lim = USBFS_XFER_MAX; | |
159 | else | |
160 | lim <<= 20; | |
161 | ||
add1aaea | 162 | atomic_add(amount, &usbfs_memory_usage); |
3f5eb8d5 | 163 | if (atomic_read(&usbfs_memory_usage) <= lim) |
add1aaea AS |
164 | return 0; |
165 | atomic_sub(amount, &usbfs_memory_usage); | |
166 | return -ENOMEM; | |
167 | } | |
168 | ||
169 | /* Memory for a transfer is being deallocated */ | |
170 | static void usbfs_decrease_memory_usage(unsigned amount) | |
171 | { | |
172 | atomic_sub(amount, &usbfs_memory_usage); | |
173 | } | |
4c6e8971 | 174 | |
9b6f0c4b | 175 | static int connected(struct usb_dev_state *ps) |
1da177e4 | 176 | { |
349710c3 AS |
177 | return (!list_empty(&ps->list) && |
178 | ps->dev->state != USB_STATE_NOTATTACHED); | |
1da177e4 LT |
179 | } |
180 | ||
f7d34b44 SG |
181 | static void dec_usb_memory_use_count(struct usb_memory *usbm, int *count) |
182 | { | |
183 | struct usb_dev_state *ps = usbm->ps; | |
184 | unsigned long flags; | |
185 | ||
186 | spin_lock_irqsave(&ps->lock, flags); | |
187 | --*count; | |
188 | if (usbm->urb_use_count == 0 && usbm->vma_use_count == 0) { | |
189 | list_del(&usbm->memlist); | |
190 | spin_unlock_irqrestore(&ps->lock, flags); | |
191 | ||
192 | usb_free_coherent(ps->dev, usbm->size, usbm->mem, | |
193 | usbm->dma_handle); | |
194 | usbfs_decrease_memory_usage( | |
195 | usbm->size + sizeof(struct usb_memory)); | |
196 | kfree(usbm); | |
197 | } else { | |
198 | spin_unlock_irqrestore(&ps->lock, flags); | |
199 | } | |
200 | } | |
201 | ||
202 | static void usbdev_vm_open(struct vm_area_struct *vma) | |
203 | { | |
204 | struct usb_memory *usbm = vma->vm_private_data; | |
205 | unsigned long flags; | |
206 | ||
207 | spin_lock_irqsave(&usbm->ps->lock, flags); | |
208 | ++usbm->vma_use_count; | |
209 | spin_unlock_irqrestore(&usbm->ps->lock, flags); | |
210 | } | |
211 | ||
212 | static void usbdev_vm_close(struct vm_area_struct *vma) | |
213 | { | |
214 | struct usb_memory *usbm = vma->vm_private_data; | |
215 | ||
216 | dec_usb_memory_use_count(usbm, &usbm->vma_use_count); | |
217 | } | |
218 | ||
10871c13 | 219 | static struct vm_operations_struct usbdev_vm_ops = { |
f7d34b44 SG |
220 | .open = usbdev_vm_open, |
221 | .close = usbdev_vm_close | |
222 | }; | |
223 | ||
224 | static int usbdev_mmap(struct file *file, struct vm_area_struct *vma) | |
225 | { | |
226 | struct usb_memory *usbm = NULL; | |
227 | struct usb_dev_state *ps = file->private_data; | |
228 | size_t size = vma->vm_end - vma->vm_start; | |
229 | void *mem; | |
230 | unsigned long flags; | |
231 | dma_addr_t dma_handle; | |
232 | int ret; | |
233 | ||
234 | ret = usbfs_increase_memory_usage(size + sizeof(struct usb_memory)); | |
235 | if (ret) | |
236 | goto error; | |
237 | ||
238 | usbm = kzalloc(sizeof(struct usb_memory), GFP_KERNEL); | |
239 | if (!usbm) { | |
240 | ret = -ENOMEM; | |
241 | goto error_decrease_mem; | |
242 | } | |
243 | ||
244 | mem = usb_alloc_coherent(ps->dev, size, GFP_USER, &dma_handle); | |
245 | if (!mem) { | |
246 | ret = -ENOMEM; | |
247 | goto error_free_usbm; | |
248 | } | |
249 | ||
250 | memset(mem, 0, size); | |
251 | ||
252 | usbm->mem = mem; | |
253 | usbm->dma_handle = dma_handle; | |
254 | usbm->size = size; | |
255 | usbm->ps = ps; | |
256 | usbm->vm_start = vma->vm_start; | |
257 | usbm->vma_use_count = 1; | |
258 | INIT_LIST_HEAD(&usbm->memlist); | |
259 | ||
260 | if (remap_pfn_range(vma, vma->vm_start, | |
261 | virt_to_phys(usbm->mem) >> PAGE_SHIFT, | |
262 | size, vma->vm_page_prot) < 0) { | |
263 | dec_usb_memory_use_count(usbm, &usbm->vma_use_count); | |
264 | return -EAGAIN; | |
265 | } | |
266 | ||
267 | vma->vm_flags |= VM_IO; | |
268 | vma->vm_flags |= (VM_DONTEXPAND | VM_DONTDUMP); | |
269 | vma->vm_ops = &usbdev_vm_ops; | |
270 | vma->vm_private_data = usbm; | |
271 | ||
272 | spin_lock_irqsave(&ps->lock, flags); | |
273 | list_add_tail(&usbm->memlist, &ps->memory_list); | |
274 | spin_unlock_irqrestore(&ps->lock, flags); | |
275 | ||
276 | return 0; | |
277 | ||
278 | error_free_usbm: | |
279 | kfree(usbm); | |
280 | error_decrease_mem: | |
281 | usbfs_decrease_memory_usage(size + sizeof(struct usb_memory)); | |
282 | error: | |
283 | return ret; | |
284 | } | |
285 | ||
04e482ff GKH |
286 | static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes, |
287 | loff_t *ppos) | |
1da177e4 | 288 | { |
9b6f0c4b | 289 | struct usb_dev_state *ps = file->private_data; |
1da177e4 LT |
290 | struct usb_device *dev = ps->dev; |
291 | ssize_t ret = 0; | |
292 | unsigned len; | |
293 | loff_t pos; | |
294 | int i; | |
295 | ||
296 | pos = *ppos; | |
297 | usb_lock_device(dev); | |
349710c3 | 298 | if (!connected(ps)) { |
1da177e4 LT |
299 | ret = -ENODEV; |
300 | goto err; | |
301 | } else if (pos < 0) { | |
302 | ret = -EINVAL; | |
303 | goto err; | |
304 | } | |
305 | ||
306 | if (pos < sizeof(struct usb_device_descriptor)) { | |
04e482ff GKH |
307 | /* 18 bytes - fits on the stack */ |
308 | struct usb_device_descriptor temp_desc; | |
8781ba0a ON |
309 | |
310 | memcpy(&temp_desc, &dev->descriptor, sizeof(dev->descriptor)); | |
9fcd5c32 AM |
311 | le16_to_cpus(&temp_desc.bcdUSB); |
312 | le16_to_cpus(&temp_desc.idVendor); | |
313 | le16_to_cpus(&temp_desc.idProduct); | |
314 | le16_to_cpus(&temp_desc.bcdDevice); | |
1da177e4 LT |
315 | |
316 | len = sizeof(struct usb_device_descriptor) - pos; | |
317 | if (len > nbytes) | |
318 | len = nbytes; | |
8781ba0a | 319 | if (copy_to_user(buf, ((char *)&temp_desc) + pos, len)) { |
1da177e4 LT |
320 | ret = -EFAULT; |
321 | goto err; | |
322 | } | |
1da177e4 LT |
323 | |
324 | *ppos += len; | |
325 | buf += len; | |
326 | nbytes -= len; | |
327 | ret += len; | |
328 | } | |
329 | ||
330 | pos = sizeof(struct usb_device_descriptor); | |
331 | for (i = 0; nbytes && i < dev->descriptor.bNumConfigurations; i++) { | |
332 | struct usb_config_descriptor *config = | |
333 | (struct usb_config_descriptor *)dev->rawdescriptors[i]; | |
334 | unsigned int length = le16_to_cpu(config->wTotalLength); | |
335 | ||
336 | if (*ppos < pos + length) { | |
337 | ||
338 | /* The descriptor may claim to be longer than it | |
339 | * really is. Here is the actual allocated length. */ | |
340 | unsigned alloclen = | |
341 | le16_to_cpu(dev->config[i].desc.wTotalLength); | |
342 | ||
343 | len = length - (*ppos - pos); | |
344 | if (len > nbytes) | |
345 | len = nbytes; | |
346 | ||
347 | /* Simply don't write (skip over) unallocated parts */ | |
348 | if (alloclen > (*ppos - pos)) { | |
349 | alloclen -= (*ppos - pos); | |
350 | if (copy_to_user(buf, | |
351 | dev->rawdescriptors[i] + (*ppos - pos), | |
352 | min(len, alloclen))) { | |
353 | ret = -EFAULT; | |
354 | goto err; | |
355 | } | |
356 | } | |
357 | ||
358 | *ppos += len; | |
359 | buf += len; | |
360 | nbytes -= len; | |
361 | ret += len; | |
362 | } | |
363 | ||
364 | pos += length; | |
365 | } | |
366 | ||
367 | err: | |
368 | usb_unlock_device(dev); | |
369 | return ret; | |
370 | } | |
371 | ||
372 | /* | |
373 | * async list handling | |
374 | */ | |
375 | ||
376 | static struct async *alloc_async(unsigned int numisoframes) | |
377 | { | |
dd95b814 | 378 | struct async *as; |
0a1ef3b5 | 379 | |
dd95b814 | 380 | as = kzalloc(sizeof(struct async), GFP_KERNEL); |
04e482ff GKH |
381 | if (!as) |
382 | return NULL; | |
1da177e4 LT |
383 | as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL); |
384 | if (!as->urb) { | |
385 | kfree(as); | |
386 | return NULL; | |
387 | } | |
04e482ff | 388 | return as; |
1da177e4 LT |
389 | } |
390 | ||
391 | static void free_async(struct async *as) | |
392 | { | |
3d97ff63 HG |
393 | int i; |
394 | ||
2425c08b | 395 | put_pid(as->pid); |
1b41c832 SS |
396 | if (as->cred) |
397 | put_cred(as->cred); | |
3d97ff63 HG |
398 | for (i = 0; i < as->urb->num_sgs; i++) { |
399 | if (sg_page(&as->urb->sg[i])) | |
400 | kfree(sg_virt(&as->urb->sg[i])); | |
401 | } | |
f7d34b44 | 402 | |
3d97ff63 | 403 | kfree(as->urb->sg); |
f7d34b44 SG |
404 | if (as->usbm == NULL) |
405 | kfree(as->urb->transfer_buffer); | |
406 | else | |
407 | dec_usb_memory_use_count(as->usbm, &as->usbm->urb_use_count); | |
408 | ||
6fd19f4b | 409 | kfree(as->urb->setup_packet); |
1da177e4 | 410 | usb_free_urb(as->urb); |
add1aaea | 411 | usbfs_decrease_memory_usage(as->mem_usage); |
6fd19f4b | 412 | kfree(as); |
1da177e4 LT |
413 | } |
414 | ||
d34d9721 | 415 | static void async_newpending(struct async *as) |
1da177e4 | 416 | { |
9b6f0c4b | 417 | struct usb_dev_state *ps = as->ps; |
04e482ff GKH |
418 | unsigned long flags; |
419 | ||
420 | spin_lock_irqsave(&ps->lock, flags); | |
421 | list_add_tail(&as->asynclist, &ps->async_pending); | |
422 | spin_unlock_irqrestore(&ps->lock, flags); | |
1da177e4 LT |
423 | } |
424 | ||
d34d9721 | 425 | static void async_removepending(struct async *as) |
1da177e4 | 426 | { |
9b6f0c4b | 427 | struct usb_dev_state *ps = as->ps; |
04e482ff GKH |
428 | unsigned long flags; |
429 | ||
430 | spin_lock_irqsave(&ps->lock, flags); | |
431 | list_del_init(&as->asynclist); | |
432 | spin_unlock_irqrestore(&ps->lock, flags); | |
1da177e4 LT |
433 | } |
434 | ||
9b6f0c4b | 435 | static struct async *async_getcompleted(struct usb_dev_state *ps) |
1da177e4 | 436 | { |
04e482ff GKH |
437 | unsigned long flags; |
438 | struct async *as = NULL; | |
439 | ||
440 | spin_lock_irqsave(&ps->lock, flags); | |
441 | if (!list_empty(&ps->async_completed)) { | |
442 | as = list_entry(ps->async_completed.next, struct async, | |
443 | asynclist); | |
444 | list_del_init(&as->asynclist); | |
445 | } | |
446 | spin_unlock_irqrestore(&ps->lock, flags); | |
447 | return as; | |
1da177e4 LT |
448 | } |
449 | ||
9b6f0c4b | 450 | static struct async *async_getpending(struct usb_dev_state *ps, |
04e482ff | 451 | void __user *userurb) |
1da177e4 | 452 | { |
04e482ff | 453 | struct async *as; |
1da177e4 | 454 | |
1da177e4 LT |
455 | list_for_each_entry(as, &ps->async_pending, asynclist) |
456 | if (as->userurb == userurb) { | |
457 | list_del_init(&as->asynclist); | |
1da177e4 LT |
458 | return as; |
459 | } | |
4e09dcf2 | 460 | |
04e482ff | 461 | return NULL; |
1da177e4 LT |
462 | } |
463 | ||
4c6e8971 AS |
464 | static void snoop_urb(struct usb_device *udev, |
465 | void __user *userurb, int pipe, unsigned length, | |
0880aef4 CF |
466 | int timeout_or_status, enum snoop_when when, |
467 | unsigned char *data, unsigned data_len) | |
e639dd3f | 468 | { |
4c6e8971 AS |
469 | static const char *types[] = {"isoc", "int", "ctrl", "bulk"}; |
470 | static const char *dirs[] = {"out", "in"}; | |
471 | int ep; | |
472 | const char *t, *d; | |
e639dd3f GKH |
473 | |
474 | if (!usbfs_snoop) | |
475 | return; | |
476 | ||
4c6e8971 AS |
477 | ep = usb_pipeendpoint(pipe); |
478 | t = types[usb_pipetype(pipe)]; | |
479 | d = dirs[!!usb_pipein(pipe)]; | |
480 | ||
481 | if (userurb) { /* Async */ | |
482 | if (when == SUBMIT) | |
483 | dev_info(&udev->dev, "userurb %p, ep%d %s-%s, " | |
484 | "length %u\n", | |
485 | userurb, ep, t, d, length); | |
486 | else | |
487 | dev_info(&udev->dev, "userurb %p, ep%d %s-%s, " | |
488 | "actual_length %u status %d\n", | |
489 | userurb, ep, t, d, length, | |
490 | timeout_or_status); | |
491 | } else { | |
492 | if (when == SUBMIT) | |
493 | dev_info(&udev->dev, "ep%d %s-%s, length %u, " | |
494 | "timeout %d\n", | |
495 | ep, t, d, length, timeout_or_status); | |
496 | else | |
497 | dev_info(&udev->dev, "ep%d %s-%s, actual_length %u, " | |
498 | "status %d\n", | |
499 | ep, t, d, length, timeout_or_status); | |
500 | } | |
0880aef4 | 501 | |
0290cc9f | 502 | data_len = min(data_len, usbfs_snoop_max); |
0880aef4 CF |
503 | if (data && data_len > 0) { |
504 | print_hex_dump(KERN_DEBUG, "data: ", DUMP_PREFIX_NONE, 32, 1, | |
505 | data, data_len, 1); | |
506 | } | |
e639dd3f GKH |
507 | } |
508 | ||
3d97ff63 HG |
509 | static void snoop_urb_data(struct urb *urb, unsigned len) |
510 | { | |
511 | int i, size; | |
512 | ||
0290cc9f AS |
513 | len = min(len, usbfs_snoop_max); |
514 | if (!usbfs_snoop || len == 0) | |
3d97ff63 HG |
515 | return; |
516 | ||
517 | if (urb->num_sgs == 0) { | |
518 | print_hex_dump(KERN_DEBUG, "data: ", DUMP_PREFIX_NONE, 32, 1, | |
519 | urb->transfer_buffer, len, 1); | |
520 | return; | |
521 | } | |
522 | ||
523 | for (i = 0; i < urb->num_sgs && len; i++) { | |
524 | size = (len > USB_SG_SIZE) ? USB_SG_SIZE : len; | |
525 | print_hex_dump(KERN_DEBUG, "data: ", DUMP_PREFIX_NONE, 32, 1, | |
526 | sg_virt(&urb->sg[i]), size, 1); | |
527 | len -= size; | |
528 | } | |
529 | } | |
530 | ||
531 | static int copy_urb_data_to_user(u8 __user *userbuffer, struct urb *urb) | |
532 | { | |
533 | unsigned i, len, size; | |
534 | ||
535 | if (urb->number_of_packets > 0) /* Isochronous */ | |
536 | len = urb->transfer_buffer_length; | |
537 | else /* Non-Isoc */ | |
538 | len = urb->actual_length; | |
539 | ||
540 | if (urb->num_sgs == 0) { | |
541 | if (copy_to_user(userbuffer, urb->transfer_buffer, len)) | |
542 | return -EFAULT; | |
543 | return 0; | |
544 | } | |
545 | ||
546 | for (i = 0; i < urb->num_sgs && len; i++) { | |
547 | size = (len > USB_SG_SIZE) ? USB_SG_SIZE : len; | |
548 | if (copy_to_user(userbuffer, sg_virt(&urb->sg[i]), size)) | |
549 | return -EFAULT; | |
550 | userbuffer += size; | |
551 | len -= size; | |
552 | } | |
553 | ||
554 | return 0; | |
555 | } | |
556 | ||
01c6460f AS |
557 | #define AS_CONTINUATION 1 |
558 | #define AS_UNLINK 2 | |
559 | ||
9b6f0c4b | 560 | static void cancel_bulk_urbs(struct usb_dev_state *ps, unsigned bulk_addr) |
01c6460f AS |
561 | __releases(ps->lock) |
562 | __acquires(ps->lock) | |
563 | { | |
4e09dcf2 | 564 | struct urb *urb; |
01c6460f AS |
565 | struct async *as; |
566 | ||
567 | /* Mark all the pending URBs that match bulk_addr, up to but not | |
568 | * including the first one without AS_CONTINUATION. If such an | |
569 | * URB is encountered then a new transfer has already started so | |
570 | * the endpoint doesn't need to be disabled; otherwise it does. | |
571 | */ | |
572 | list_for_each_entry(as, &ps->async_pending, asynclist) { | |
573 | if (as->bulk_addr == bulk_addr) { | |
574 | if (as->bulk_status != AS_CONTINUATION) | |
575 | goto rescan; | |
576 | as->bulk_status = AS_UNLINK; | |
577 | as->bulk_addr = 0; | |
578 | } | |
579 | } | |
580 | ps->disabled_bulk_eps |= (1 << bulk_addr); | |
581 | ||
582 | /* Now carefully unlink all the marked pending URBs */ | |
583 | rescan: | |
584 | list_for_each_entry(as, &ps->async_pending, asynclist) { | |
585 | if (as->bulk_status == AS_UNLINK) { | |
586 | as->bulk_status = 0; /* Only once */ | |
4e09dcf2 HL |
587 | urb = as->urb; |
588 | usb_get_urb(urb); | |
01c6460f | 589 | spin_unlock(&ps->lock); /* Allow completions */ |
4e09dcf2 HL |
590 | usb_unlink_urb(urb); |
591 | usb_put_urb(urb); | |
01c6460f AS |
592 | spin_lock(&ps->lock); |
593 | goto rescan; | |
594 | } | |
595 | } | |
596 | } | |
597 | ||
7d12e780 | 598 | static void async_completed(struct urb *urb) |
1da177e4 | 599 | { |
04e482ff | 600 | struct async *as = urb->context; |
9b6f0c4b | 601 | struct usb_dev_state *ps = as->ps; |
1da177e4 | 602 | struct siginfo sinfo; |
516a1a07 | 603 | struct pid *pid = NULL; |
516a1a07 | 604 | u32 secid = 0; |
d178bc3a | 605 | const struct cred *cred = NULL; |
516a1a07 | 606 | int signr; |
1da177e4 | 607 | |
04e482ff GKH |
608 | spin_lock(&ps->lock); |
609 | list_move_tail(&as->asynclist, &ps->async_completed); | |
e015268d | 610 | as->status = urb->status; |
516a1a07 ON |
611 | signr = as->signr; |
612 | if (signr) { | |
f0c2b681 | 613 | memset(&sinfo, 0, sizeof(sinfo)); |
1da177e4 | 614 | sinfo.si_signo = as->signr; |
e015268d | 615 | sinfo.si_errno = as->status; |
1da177e4 LT |
616 | sinfo.si_code = SI_ASYNCIO; |
617 | sinfo.si_addr = as->userurb; | |
aec01c58 | 618 | pid = get_pid(as->pid); |
d178bc3a | 619 | cred = get_cred(as->cred); |
516a1a07 | 620 | secid = as->secid; |
1da177e4 | 621 | } |
e639dd3f | 622 | snoop(&urb->dev->dev, "urb complete\n"); |
4c6e8971 | 623 | snoop_urb(urb->dev, as->userurb, urb->pipe, urb->actual_length, |
3d97ff63 | 624 | as->status, COMPLETE, NULL, 0); |
83ed07c5 | 625 | if ((urb->transfer_flags & URB_DIR_MASK) == URB_DIR_IN) |
3d97ff63 HG |
626 | snoop_urb_data(urb, urb->actual_length); |
627 | ||
01c6460f AS |
628 | if (as->status < 0 && as->bulk_addr && as->status != -ECONNRESET && |
629 | as->status != -ENOENT) | |
630 | cancel_bulk_urbs(ps, as->bulk_addr); | |
516a1a07 ON |
631 | spin_unlock(&ps->lock); |
632 | ||
aec01c58 | 633 | if (signr) { |
d178bc3a | 634 | kill_pid_info_as_cred(sinfo.si_signo, &sinfo, pid, cred, secid); |
aec01c58 | 635 | put_pid(pid); |
d178bc3a | 636 | put_cred(cred); |
aec01c58 | 637 | } |
516a1a07 | 638 | |
e639dd3f | 639 | wake_up(&ps->wait); |
1da177e4 LT |
640 | } |
641 | ||
9b6f0c4b | 642 | static void destroy_async(struct usb_dev_state *ps, struct list_head *list) |
1da177e4 | 643 | { |
4e09dcf2 | 644 | struct urb *urb; |
1da177e4 LT |
645 | struct async *as; |
646 | unsigned long flags; | |
647 | ||
648 | spin_lock_irqsave(&ps->lock, flags); | |
649 | while (!list_empty(list)) { | |
650 | as = list_entry(list->next, struct async, asynclist); | |
651 | list_del_init(&as->asynclist); | |
4e09dcf2 HL |
652 | urb = as->urb; |
653 | usb_get_urb(urb); | |
1da177e4 LT |
654 | |
655 | /* drop the spinlock so the completion handler can run */ | |
656 | spin_unlock_irqrestore(&ps->lock, flags); | |
4e09dcf2 HL |
657 | usb_kill_urb(urb); |
658 | usb_put_urb(urb); | |
1da177e4 LT |
659 | spin_lock_irqsave(&ps->lock, flags); |
660 | } | |
661 | spin_unlock_irqrestore(&ps->lock, flags); | |
1da177e4 LT |
662 | } |
663 | ||
9b6f0c4b | 664 | static void destroy_async_on_interface(struct usb_dev_state *ps, |
04e482ff | 665 | unsigned int ifnum) |
1da177e4 LT |
666 | { |
667 | struct list_head *p, *q, hitlist; | |
668 | unsigned long flags; | |
669 | ||
670 | INIT_LIST_HEAD(&hitlist); | |
671 | spin_lock_irqsave(&ps->lock, flags); | |
672 | list_for_each_safe(p, q, &ps->async_pending) | |
673 | if (ifnum == list_entry(p, struct async, asynclist)->ifnum) | |
674 | list_move_tail(p, &hitlist); | |
675 | spin_unlock_irqrestore(&ps->lock, flags); | |
676 | destroy_async(ps, &hitlist); | |
677 | } | |
678 | ||
9b6f0c4b | 679 | static void destroy_all_async(struct usb_dev_state *ps) |
1da177e4 | 680 | { |
04e482ff | 681 | destroy_async(ps, &ps->async_pending); |
1da177e4 LT |
682 | } |
683 | ||
684 | /* | |
685 | * interface claims are made only at the request of user level code, | |
686 | * which can also release them (explicitly or by closing files). | |
687 | * they're also undone when devices disconnect. | |
688 | */ | |
689 | ||
04e482ff GKH |
690 | static int driver_probe(struct usb_interface *intf, |
691 | const struct usb_device_id *id) | |
1da177e4 LT |
692 | { |
693 | return -ENODEV; | |
694 | } | |
695 | ||
696 | static void driver_disconnect(struct usb_interface *intf) | |
697 | { | |
9b6f0c4b | 698 | struct usb_dev_state *ps = usb_get_intfdata(intf); |
1da177e4 LT |
699 | unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber; |
700 | ||
701 | if (!ps) | |
702 | return; | |
703 | ||
704 | /* NOTE: this relies on usbcore having canceled and completed | |
705 | * all pending I/O requests; 2.6 does that. | |
706 | */ | |
707 | ||
708 | if (likely(ifnum < 8*sizeof(ps->ifclaimed))) | |
709 | clear_bit(ifnum, &ps->ifclaimed); | |
710 | else | |
3b6004f3 GKH |
711 | dev_warn(&intf->dev, "interface number %u out of range\n", |
712 | ifnum); | |
1da177e4 | 713 | |
04e482ff | 714 | usb_set_intfdata(intf, NULL); |
1da177e4 LT |
715 | |
716 | /* force async requests to complete */ | |
717 | destroy_async_on_interface(ps, ifnum); | |
718 | } | |
719 | ||
2e2eb83f AS |
720 | /* The following routines are merely placeholders. There is no way |
721 | * to inform a user task about suspend or resumes. | |
722 | */ | |
723 | static int driver_suspend(struct usb_interface *intf, pm_message_t msg) | |
724 | { | |
725 | return 0; | |
726 | } | |
727 | ||
728 | static int driver_resume(struct usb_interface *intf) | |
729 | { | |
730 | return 0; | |
731 | } | |
732 | ||
1da177e4 | 733 | struct usb_driver usbfs_driver = { |
1da177e4 LT |
734 | .name = "usbfs", |
735 | .probe = driver_probe, | |
736 | .disconnect = driver_disconnect, | |
2e2eb83f AS |
737 | .suspend = driver_suspend, |
738 | .resume = driver_resume, | |
1da177e4 LT |
739 | }; |
740 | ||
9b6f0c4b | 741 | static int claimintf(struct usb_dev_state *ps, unsigned int ifnum) |
1da177e4 LT |
742 | { |
743 | struct usb_device *dev = ps->dev; | |
744 | struct usb_interface *intf; | |
745 | int err; | |
746 | ||
747 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
748 | return -EINVAL; | |
749 | /* already claimed */ | |
750 | if (test_bit(ifnum, &ps->ifclaimed)) | |
751 | return 0; | |
752 | ||
d883f52e RG |
753 | if (ps->privileges_dropped && |
754 | !test_bit(ifnum, &ps->interface_allowed_mask)) | |
755 | return -EACCES; | |
756 | ||
1da177e4 LT |
757 | intf = usb_ifnum_to_if(dev, ifnum); |
758 | if (!intf) | |
759 | err = -ENOENT; | |
760 | else | |
761 | err = usb_driver_claim_interface(&usbfs_driver, intf, ps); | |
1da177e4 LT |
762 | if (err == 0) |
763 | set_bit(ifnum, &ps->ifclaimed); | |
764 | return err; | |
765 | } | |
766 | ||
9b6f0c4b | 767 | static int releaseintf(struct usb_dev_state *ps, unsigned int ifnum) |
1da177e4 LT |
768 | { |
769 | struct usb_device *dev; | |
770 | struct usb_interface *intf; | |
771 | int err; | |
772 | ||
773 | err = -EINVAL; | |
774 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
775 | return err; | |
776 | dev = ps->dev; | |
1da177e4 LT |
777 | intf = usb_ifnum_to_if(dev, ifnum); |
778 | if (!intf) | |
779 | err = -ENOENT; | |
780 | else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) { | |
781 | usb_driver_release_interface(&usbfs_driver, intf); | |
782 | err = 0; | |
783 | } | |
1da177e4 LT |
784 | return err; |
785 | } | |
786 | ||
9b6f0c4b | 787 | static int checkintf(struct usb_dev_state *ps, unsigned int ifnum) |
1da177e4 LT |
788 | { |
789 | if (ps->dev->state != USB_STATE_CONFIGURED) | |
790 | return -EHOSTUNREACH; | |
791 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
792 | return -EINVAL; | |
793 | if (test_bit(ifnum, &ps->ifclaimed)) | |
794 | return 0; | |
795 | /* if not yet claimed, claim it for the driver */ | |
04e482ff GKH |
796 | dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim " |
797 | "interface %u before use\n", task_pid_nr(current), | |
798 | current->comm, ifnum); | |
1da177e4 LT |
799 | return claimintf(ps, ifnum); |
800 | } | |
801 | ||
802 | static int findintfep(struct usb_device *dev, unsigned int ep) | |
803 | { | |
804 | unsigned int i, j, e; | |
04e482ff | 805 | struct usb_interface *intf; |
1da177e4 LT |
806 | struct usb_host_interface *alts; |
807 | struct usb_endpoint_descriptor *endpt; | |
808 | ||
809 | if (ep & ~(USB_DIR_IN|0xf)) | |
810 | return -EINVAL; | |
811 | if (!dev->actconfig) | |
812 | return -ESRCH; | |
813 | for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) { | |
814 | intf = dev->actconfig->interface[i]; | |
815 | for (j = 0; j < intf->num_altsetting; j++) { | |
04e482ff | 816 | alts = &intf->altsetting[j]; |
1da177e4 LT |
817 | for (e = 0; e < alts->desc.bNumEndpoints; e++) { |
818 | endpt = &alts->endpoint[e].desc; | |
819 | if (endpt->bEndpointAddress == ep) | |
820 | return alts->desc.bInterfaceNumber; | |
821 | } | |
822 | } | |
823 | } | |
04e482ff | 824 | return -ENOENT; |
1da177e4 LT |
825 | } |
826 | ||
9b6f0c4b | 827 | static int check_ctrlrecip(struct usb_dev_state *ps, unsigned int requesttype, |
393cbb51 | 828 | unsigned int request, unsigned int index) |
1da177e4 LT |
829 | { |
830 | int ret = 0; | |
393cbb51 | 831 | struct usb_host_interface *alt_setting; |
1da177e4 | 832 | |
6da9c990 DV |
833 | if (ps->dev->state != USB_STATE_UNAUTHENTICATED |
834 | && ps->dev->state != USB_STATE_ADDRESS | |
24f8b116 | 835 | && ps->dev->state != USB_STATE_CONFIGURED) |
1da177e4 LT |
836 | return -EHOSTUNREACH; |
837 | if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype)) | |
838 | return 0; | |
839 | ||
393cbb51 MD |
840 | /* |
841 | * check for the special corner case 'get_device_id' in the printer | |
5dc50c35 HG |
842 | * class specification, which we always want to allow as it is used |
843 | * to query things like ink level, etc. | |
393cbb51 MD |
844 | */ |
845 | if (requesttype == 0xa1 && request == 0) { | |
846 | alt_setting = usb_find_alt_setting(ps->dev->actconfig, | |
847 | index >> 8, index & 0xff); | |
848 | if (alt_setting | |
849 | && alt_setting->desc.bInterfaceClass == USB_CLASS_PRINTER) | |
5dc50c35 | 850 | return 0; |
393cbb51 MD |
851 | } |
852 | ||
1da177e4 LT |
853 | index &= 0xff; |
854 | switch (requesttype & USB_RECIP_MASK) { | |
855 | case USB_RECIP_ENDPOINT: | |
1361bf4b HG |
856 | if ((index & ~USB_DIR_IN) == 0) |
857 | return 0; | |
04e482ff | 858 | ret = findintfep(ps->dev, index); |
831abf76 KG |
859 | if (ret < 0) { |
860 | /* | |
861 | * Some not fully compliant Win apps seem to get | |
862 | * index wrong and have the endpoint number here | |
863 | * rather than the endpoint address (with the | |
864 | * correct direction). Win does let this through, | |
865 | * so we'll not reject it here but leave it to | |
866 | * the device to not break KVM. But we warn. | |
867 | */ | |
868 | ret = findintfep(ps->dev, index ^ 0x80); | |
869 | if (ret >= 0) | |
870 | dev_info(&ps->dev->dev, | |
871 | "%s: process %i (%s) requesting ep %02x but needs %02x\n", | |
872 | __func__, task_pid_nr(current), | |
873 | current->comm, index, index ^ 0x80); | |
874 | } | |
04e482ff | 875 | if (ret >= 0) |
1da177e4 LT |
876 | ret = checkintf(ps, ret); |
877 | break; | |
878 | ||
879 | case USB_RECIP_INTERFACE: | |
880 | ret = checkintf(ps, index); | |
881 | break; | |
882 | } | |
883 | return ret; | |
884 | } | |
885 | ||
2fec32b0 HG |
886 | static struct usb_host_endpoint *ep_to_host_endpoint(struct usb_device *dev, |
887 | unsigned char ep) | |
888 | { | |
889 | if (ep & USB_ENDPOINT_DIR_MASK) | |
890 | return dev->ep_in[ep & USB_ENDPOINT_NUMBER_MASK]; | |
891 | else | |
892 | return dev->ep_out[ep & USB_ENDPOINT_NUMBER_MASK]; | |
893 | } | |
894 | ||
3e75c6de | 895 | static int parse_usbdevfs_streams(struct usb_dev_state *ps, |
bcf7f6e3 HG |
896 | struct usbdevfs_streams __user *streams, |
897 | unsigned int *num_streams_ret, | |
898 | unsigned int *num_eps_ret, | |
899 | struct usb_host_endpoint ***eps_ret, | |
900 | struct usb_interface **intf_ret) | |
901 | { | |
902 | unsigned int i, num_streams, num_eps; | |
903 | struct usb_host_endpoint **eps; | |
904 | struct usb_interface *intf = NULL; | |
905 | unsigned char ep; | |
906 | int ifnum, ret; | |
907 | ||
908 | if (get_user(num_streams, &streams->num_streams) || | |
909 | get_user(num_eps, &streams->num_eps)) | |
910 | return -EFAULT; | |
911 | ||
912 | if (num_eps < 1 || num_eps > USB_MAXENDPOINTS) | |
913 | return -EINVAL; | |
914 | ||
915 | /* The XHCI controller allows max 2 ^ 16 streams */ | |
916 | if (num_streams_ret && (num_streams < 2 || num_streams > 65536)) | |
917 | return -EINVAL; | |
918 | ||
919 | eps = kmalloc(num_eps * sizeof(*eps), GFP_KERNEL); | |
920 | if (!eps) | |
921 | return -ENOMEM; | |
922 | ||
923 | for (i = 0; i < num_eps; i++) { | |
924 | if (get_user(ep, &streams->eps[i])) { | |
925 | ret = -EFAULT; | |
926 | goto error; | |
927 | } | |
928 | eps[i] = ep_to_host_endpoint(ps->dev, ep); | |
929 | if (!eps[i]) { | |
930 | ret = -EINVAL; | |
931 | goto error; | |
932 | } | |
933 | ||
934 | /* usb_alloc/free_streams operate on an usb_interface */ | |
935 | ifnum = findintfep(ps->dev, ep); | |
936 | if (ifnum < 0) { | |
937 | ret = ifnum; | |
938 | goto error; | |
939 | } | |
940 | ||
941 | if (i == 0) { | |
942 | ret = checkintf(ps, ifnum); | |
943 | if (ret < 0) | |
944 | goto error; | |
945 | intf = usb_ifnum_to_if(ps->dev, ifnum); | |
946 | } else { | |
947 | /* Verify all eps belong to the same interface */ | |
948 | if (ifnum != intf->altsetting->desc.bInterfaceNumber) { | |
949 | ret = -EINVAL; | |
950 | goto error; | |
951 | } | |
952 | } | |
953 | } | |
954 | ||
955 | if (num_streams_ret) | |
956 | *num_streams_ret = num_streams; | |
957 | *num_eps_ret = num_eps; | |
958 | *eps_ret = eps; | |
959 | *intf_ret = intf; | |
960 | ||
961 | return 0; | |
962 | ||
963 | error: | |
964 | kfree(eps); | |
965 | return ret; | |
966 | } | |
967 | ||
61ad04a8 | 968 | static int match_devt(struct device *dev, void *data) |
4592bf5a | 969 | { |
a80d5ff0 | 970 | return dev->devt == (dev_t) (unsigned long) data; |
9f8b17e6 | 971 | } |
4592bf5a | 972 | |
61ad04a8 | 973 | static struct usb_device *usbdev_lookup_by_devt(dev_t devt) |
9f8b17e6 KS |
974 | { |
975 | struct device *dev; | |
976 | ||
a80d5ff0 DH |
977 | dev = bus_find_device(&usb_bus_type, NULL, |
978 | (void *) (unsigned long) devt, match_devt); | |
9f8b17e6 KS |
979 | if (!dev) |
980 | return NULL; | |
69ab55d7 | 981 | return to_usb_device(dev); |
9f8b17e6 | 982 | } |
4592bf5a | 983 | |
1da177e4 LT |
984 | /* |
985 | * file operations | |
986 | */ | |
987 | static int usbdev_open(struct inode *inode, struct file *file) | |
988 | { | |
fbf82fd2 | 989 | struct usb_device *dev = NULL; |
9b6f0c4b | 990 | struct usb_dev_state *ps; |
1da177e4 LT |
991 | int ret; |
992 | ||
1da177e4 | 993 | ret = -ENOMEM; |
d883f52e | 994 | ps = kzalloc(sizeof(struct usb_dev_state), GFP_KERNEL); |
04e482ff | 995 | if (!ps) |
62e299e6 | 996 | goto out_free_ps; |
1da177e4 | 997 | |
01105a24 | 998 | ret = -ENODEV; |
61ad04a8 | 999 | |
62e299e6 AS |
1000 | /* Protect against simultaneous removal or release */ |
1001 | mutex_lock(&usbfs_mutex); | |
1002 | ||
9f8b17e6 | 1003 | /* usbdev device-node */ |
fbf82fd2 | 1004 | if (imajor(inode) == USB_DEVICE_MAJOR) |
61ad04a8 | 1005 | dev = usbdev_lookup_by_devt(inode->i_rdev); |
62e299e6 | 1006 | |
62e299e6 AS |
1007 | mutex_unlock(&usbfs_mutex); |
1008 | ||
1009 | if (!dev) | |
1010 | goto out_free_ps; | |
1011 | ||
1012 | usb_lock_device(dev); | |
1013 | if (dev->state == USB_STATE_NOTATTACHED) | |
1014 | goto out_unlock_device; | |
1015 | ||
94fcda1f | 1016 | ret = usb_autoresume_device(dev); |
01d883d4 | 1017 | if (ret) |
62e299e6 | 1018 | goto out_unlock_device; |
01d883d4 | 1019 | |
1da177e4 LT |
1020 | ps->dev = dev; |
1021 | ps->file = file; | |
d883f52e | 1022 | ps->interface_allowed_mask = 0xFFFFFFFF; /* 32 bits */ |
1da177e4 | 1023 | spin_lock_init(&ps->lock); |
316547fd | 1024 | INIT_LIST_HEAD(&ps->list); |
1da177e4 LT |
1025 | INIT_LIST_HEAD(&ps->async_pending); |
1026 | INIT_LIST_HEAD(&ps->async_completed); | |
f7d34b44 | 1027 | INIT_LIST_HEAD(&ps->memory_list); |
1da177e4 | 1028 | init_waitqueue_head(&ps->wait); |
2425c08b | 1029 | ps->disc_pid = get_pid(task_pid(current)); |
d178bc3a | 1030 | ps->cred = get_current_cred(); |
7a01955f | 1031 | security_task_getsecid(current, &ps->secid); |
527660a8 | 1032 | smp_wmb(); |
1da177e4 LT |
1033 | list_add_tail(&ps->list, &dev->filelist); |
1034 | file->private_data = ps; | |
62e299e6 | 1035 | usb_unlock_device(dev); |
2da41d5f AS |
1036 | snoop(&dev->dev, "opened by process %d: %s\n", task_pid_nr(current), |
1037 | current->comm); | |
62e299e6 AS |
1038 | return ret; |
1039 | ||
1040 | out_unlock_device: | |
1041 | usb_unlock_device(dev); | |
1042 | usb_put_dev(dev); | |
1043 | out_free_ps: | |
1044 | kfree(ps); | |
4a2a8a2c | 1045 | return ret; |
1da177e4 LT |
1046 | } |
1047 | ||
1048 | static int usbdev_release(struct inode *inode, struct file *file) | |
1049 | { | |
9b6f0c4b | 1050 | struct usb_dev_state *ps = file->private_data; |
1da177e4 LT |
1051 | struct usb_device *dev = ps->dev; |
1052 | unsigned int ifnum; | |
6ff10464 | 1053 | struct async *as; |
1da177e4 LT |
1054 | |
1055 | usb_lock_device(dev); | |
7cbe5dca | 1056 | usb_hub_release_all_ports(dev, ps); |
4a2a8a2c | 1057 | |
1da177e4 | 1058 | list_del_init(&ps->list); |
4a2a8a2c | 1059 | |
1da177e4 LT |
1060 | for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed); |
1061 | ifnum++) { | |
1062 | if (test_bit(ifnum, &ps->ifclaimed)) | |
1063 | releaseintf(ps, ifnum); | |
1064 | } | |
1065 | destroy_all_async(ps); | |
94fcda1f | 1066 | usb_autosuspend_device(dev); |
1da177e4 LT |
1067 | usb_unlock_device(dev); |
1068 | usb_put_dev(dev); | |
2425c08b | 1069 | put_pid(ps->disc_pid); |
d178bc3a | 1070 | put_cred(ps->cred); |
6ff10464 AS |
1071 | |
1072 | as = async_getcompleted(ps); | |
1073 | while (as) { | |
1074 | free_async(as); | |
1075 | as = async_getcompleted(ps); | |
1076 | } | |
f7d34b44 | 1077 | |
1da177e4 | 1078 | kfree(ps); |
4a2a8a2c | 1079 | return 0; |
1da177e4 LT |
1080 | } |
1081 | ||
9b6f0c4b | 1082 | static int proc_control(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
1083 | { |
1084 | struct usb_device *dev = ps->dev; | |
1085 | struct usbdevfs_ctrltransfer ctrl; | |
1086 | unsigned int tmo; | |
1087 | unsigned char *tbuf; | |
ff66e3ce | 1088 | unsigned wLength; |
4c6e8971 | 1089 | int i, pipe, ret; |
1da177e4 LT |
1090 | |
1091 | if (copy_from_user(&ctrl, arg, sizeof(ctrl))) | |
1092 | return -EFAULT; | |
393cbb51 MD |
1093 | ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.bRequest, |
1094 | ctrl.wIndex); | |
04e482ff | 1095 | if (ret) |
1da177e4 | 1096 | return ret; |
ff66e3ce AM |
1097 | wLength = ctrl.wLength; /* To suppress 64k PAGE_SIZE warning */ |
1098 | if (wLength > PAGE_SIZE) | |
1da177e4 | 1099 | return -EINVAL; |
add1aaea AS |
1100 | ret = usbfs_increase_memory_usage(PAGE_SIZE + sizeof(struct urb) + |
1101 | sizeof(struct usb_ctrlrequest)); | |
1102 | if (ret) | |
1103 | return ret; | |
04e482ff | 1104 | tbuf = (unsigned char *)__get_free_page(GFP_KERNEL); |
add1aaea AS |
1105 | if (!tbuf) { |
1106 | ret = -ENOMEM; | |
1107 | goto done; | |
1108 | } | |
1da177e4 | 1109 | tmo = ctrl.timeout; |
0880aef4 CF |
1110 | snoop(&dev->dev, "control urb: bRequestType=%02x " |
1111 | "bRequest=%02x wValue=%04x " | |
1112 | "wIndex=%04x wLength=%04x\n", | |
c8f2efc8 XR |
1113 | ctrl.bRequestType, ctrl.bRequest, ctrl.wValue, |
1114 | ctrl.wIndex, ctrl.wLength); | |
1da177e4 | 1115 | if (ctrl.bRequestType & 0x80) { |
04e482ff GKH |
1116 | if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data, |
1117 | ctrl.wLength)) { | |
52fb743d AS |
1118 | ret = -EINVAL; |
1119 | goto done; | |
1da177e4 | 1120 | } |
4c6e8971 | 1121 | pipe = usb_rcvctrlpipe(dev, 0); |
0880aef4 | 1122 | snoop_urb(dev, NULL, pipe, ctrl.wLength, tmo, SUBMIT, NULL, 0); |
1da177e4 LT |
1123 | |
1124 | usb_unlock_device(dev); | |
4c6e8971 | 1125 | i = usb_control_msg(dev, pipe, ctrl.bRequest, |
04e482ff GKH |
1126 | ctrl.bRequestType, ctrl.wValue, ctrl.wIndex, |
1127 | tbuf, ctrl.wLength, tmo); | |
1da177e4 | 1128 | usb_lock_device(dev); |
0880aef4 | 1129 | snoop_urb(dev, NULL, pipe, max(i, 0), min(i, 0), COMPLETE, |
9d02b426 | 1130 | tbuf, max(i, 0)); |
1da177e4 | 1131 | if ((i > 0) && ctrl.wLength) { |
fe0410c7 | 1132 | if (copy_to_user(ctrl.data, tbuf, i)) { |
52fb743d AS |
1133 | ret = -EFAULT; |
1134 | goto done; | |
1da177e4 LT |
1135 | } |
1136 | } | |
1137 | } else { | |
1138 | if (ctrl.wLength) { | |
1139 | if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) { | |
52fb743d AS |
1140 | ret = -EFAULT; |
1141 | goto done; | |
1da177e4 LT |
1142 | } |
1143 | } | |
4c6e8971 | 1144 | pipe = usb_sndctrlpipe(dev, 0); |
0880aef4 CF |
1145 | snoop_urb(dev, NULL, pipe, ctrl.wLength, tmo, SUBMIT, |
1146 | tbuf, ctrl.wLength); | |
4c6e8971 | 1147 | |
1da177e4 | 1148 | usb_unlock_device(dev); |
04e482ff GKH |
1149 | i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest, |
1150 | ctrl.bRequestType, ctrl.wValue, ctrl.wIndex, | |
1151 | tbuf, ctrl.wLength, tmo); | |
1da177e4 | 1152 | usb_lock_device(dev); |
0880aef4 | 1153 | snoop_urb(dev, NULL, pipe, max(i, 0), min(i, 0), COMPLETE, NULL, 0); |
1da177e4 | 1154 | } |
04e482ff | 1155 | if (i < 0 && i != -EPIPE) { |
1da177e4 LT |
1156 | dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL " |
1157 | "failed cmd %s rqt %u rq %u len %u ret %d\n", | |
1158 | current->comm, ctrl.bRequestType, ctrl.bRequest, | |
1159 | ctrl.wLength, i); | |
1160 | } | |
52fb743d AS |
1161 | ret = i; |
1162 | done: | |
1163 | free_page((unsigned long) tbuf); | |
add1aaea AS |
1164 | usbfs_decrease_memory_usage(PAGE_SIZE + sizeof(struct urb) + |
1165 | sizeof(struct usb_ctrlrequest)); | |
52fb743d | 1166 | return ret; |
1da177e4 LT |
1167 | } |
1168 | ||
9b6f0c4b | 1169 | static int proc_bulk(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
1170 | { |
1171 | struct usb_device *dev = ps->dev; | |
1172 | struct usbdevfs_bulktransfer bulk; | |
1173 | unsigned int tmo, len1, pipe; | |
1174 | int len2; | |
1175 | unsigned char *tbuf; | |
4c6e8971 | 1176 | int i, ret; |
1da177e4 LT |
1177 | |
1178 | if (copy_from_user(&bulk, arg, sizeof(bulk))) | |
1179 | return -EFAULT; | |
04e482ff GKH |
1180 | ret = findintfep(ps->dev, bulk.ep); |
1181 | if (ret < 0) | |
1da177e4 | 1182 | return ret; |
04e482ff GKH |
1183 | ret = checkintf(ps, ret); |
1184 | if (ret) | |
1da177e4 LT |
1185 | return ret; |
1186 | if (bulk.ep & USB_DIR_IN) | |
1187 | pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f); | |
1188 | else | |
1189 | pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f); | |
1190 | if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN))) | |
1191 | return -EINVAL; | |
1192 | len1 = bulk.len; | |
3f5eb8d5 | 1193 | if (len1 >= USBFS_XFER_MAX) |
1da177e4 | 1194 | return -EINVAL; |
add1aaea AS |
1195 | ret = usbfs_increase_memory_usage(len1 + sizeof(struct urb)); |
1196 | if (ret) | |
1197 | return ret; | |
135551ea KB |
1198 | tbuf = kmalloc(len1, GFP_KERNEL); |
1199 | if (!tbuf) { | |
add1aaea AS |
1200 | ret = -ENOMEM; |
1201 | goto done; | |
1202 | } | |
1da177e4 LT |
1203 | tmo = bulk.timeout; |
1204 | if (bulk.ep & 0x80) { | |
1205 | if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) { | |
52fb743d AS |
1206 | ret = -EINVAL; |
1207 | goto done; | |
1da177e4 | 1208 | } |
0880aef4 | 1209 | snoop_urb(dev, NULL, pipe, len1, tmo, SUBMIT, NULL, 0); |
4c6e8971 | 1210 | |
1da177e4 LT |
1211 | usb_unlock_device(dev); |
1212 | i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo); | |
1213 | usb_lock_device(dev); | |
0880aef4 | 1214 | snoop_urb(dev, NULL, pipe, len2, i, COMPLETE, tbuf, len2); |
4c6e8971 | 1215 | |
1da177e4 LT |
1216 | if (!i && len2) { |
1217 | if (copy_to_user(bulk.data, tbuf, len2)) { | |
52fb743d AS |
1218 | ret = -EFAULT; |
1219 | goto done; | |
1da177e4 LT |
1220 | } |
1221 | } | |
1222 | } else { | |
1223 | if (len1) { | |
1224 | if (copy_from_user(tbuf, bulk.data, len1)) { | |
52fb743d AS |
1225 | ret = -EFAULT; |
1226 | goto done; | |
1da177e4 LT |
1227 | } |
1228 | } | |
0880aef4 | 1229 | snoop_urb(dev, NULL, pipe, len1, tmo, SUBMIT, tbuf, len1); |
4c6e8971 | 1230 | |
1da177e4 LT |
1231 | usb_unlock_device(dev); |
1232 | i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo); | |
1233 | usb_lock_device(dev); | |
0880aef4 | 1234 | snoop_urb(dev, NULL, pipe, len2, i, COMPLETE, NULL, 0); |
1da177e4 | 1235 | } |
52fb743d AS |
1236 | ret = (i < 0 ? i : len2); |
1237 | done: | |
1da177e4 | 1238 | kfree(tbuf); |
add1aaea | 1239 | usbfs_decrease_memory_usage(len1 + sizeof(struct urb)); |
52fb743d | 1240 | return ret; |
1da177e4 LT |
1241 | } |
1242 | ||
f080a51b AS |
1243 | static void check_reset_of_active_ep(struct usb_device *udev, |
1244 | unsigned int epnum, char *ioctl_name) | |
1245 | { | |
1246 | struct usb_host_endpoint **eps; | |
1247 | struct usb_host_endpoint *ep; | |
1248 | ||
1249 | eps = (epnum & USB_DIR_IN) ? udev->ep_in : udev->ep_out; | |
1250 | ep = eps[epnum & 0x0f]; | |
1251 | if (ep && !list_empty(&ep->urb_list)) | |
1252 | dev_warn(&udev->dev, "Process %d (%s) called USBDEVFS_%s for active endpoint 0x%02x\n", | |
1253 | task_pid_nr(current), current->comm, | |
1254 | ioctl_name, epnum); | |
1255 | } | |
1256 | ||
9b6f0c4b | 1257 | static int proc_resetep(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
1258 | { |
1259 | unsigned int ep; | |
1260 | int ret; | |
1261 | ||
1262 | if (get_user(ep, (unsigned int __user *)arg)) | |
1263 | return -EFAULT; | |
04e482ff GKH |
1264 | ret = findintfep(ps->dev, ep); |
1265 | if (ret < 0) | |
1da177e4 | 1266 | return ret; |
04e482ff GKH |
1267 | ret = checkintf(ps, ret); |
1268 | if (ret) | |
1da177e4 | 1269 | return ret; |
f080a51b | 1270 | check_reset_of_active_ep(ps->dev, ep, "RESETEP"); |
3444b26a | 1271 | usb_reset_endpoint(ps->dev, ep); |
1da177e4 LT |
1272 | return 0; |
1273 | } | |
1274 | ||
9b6f0c4b | 1275 | static int proc_clearhalt(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
1276 | { |
1277 | unsigned int ep; | |
1278 | int pipe; | |
1279 | int ret; | |
1280 | ||
1281 | if (get_user(ep, (unsigned int __user *)arg)) | |
1282 | return -EFAULT; | |
04e482ff GKH |
1283 | ret = findintfep(ps->dev, ep); |
1284 | if (ret < 0) | |
1da177e4 | 1285 | return ret; |
04e482ff GKH |
1286 | ret = checkintf(ps, ret); |
1287 | if (ret) | |
1da177e4 | 1288 | return ret; |
f080a51b | 1289 | check_reset_of_active_ep(ps->dev, ep, "CLEAR_HALT"); |
1da177e4 | 1290 | if (ep & USB_DIR_IN) |
04e482ff GKH |
1291 | pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f); |
1292 | else | |
1293 | pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f); | |
1da177e4 LT |
1294 | |
1295 | return usb_clear_halt(ps->dev, pipe); | |
1296 | } | |
1da177e4 | 1297 | |
9b6f0c4b | 1298 | static int proc_getdriver(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
1299 | { |
1300 | struct usbdevfs_getdriver gd; | |
1301 | struct usb_interface *intf; | |
1302 | int ret; | |
1303 | ||
1304 | if (copy_from_user(&gd, arg, sizeof(gd))) | |
1305 | return -EFAULT; | |
1da177e4 LT |
1306 | intf = usb_ifnum_to_if(ps->dev, gd.interface); |
1307 | if (!intf || !intf->dev.driver) | |
1308 | ret = -ENODATA; | |
1309 | else { | |
b11b2e1b | 1310 | strlcpy(gd.driver, intf->dev.driver->name, |
1da177e4 LT |
1311 | sizeof(gd.driver)); |
1312 | ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0); | |
1313 | } | |
1da177e4 LT |
1314 | return ret; |
1315 | } | |
1316 | ||
9b6f0c4b | 1317 | static int proc_connectinfo(struct usb_dev_state *ps, void __user *arg) |
1da177e4 | 1318 | { |
886ccd45 VK |
1319 | struct usbdevfs_connectinfo ci = { |
1320 | .devnum = ps->dev->devnum, | |
1321 | .slow = ps->dev->speed == USB_SPEED_LOW | |
1322 | }; | |
1da177e4 | 1323 | |
1da177e4 LT |
1324 | if (copy_to_user(arg, &ci, sizeof(ci))) |
1325 | return -EFAULT; | |
1326 | return 0; | |
1327 | } | |
1328 | ||
9b6f0c4b | 1329 | static int proc_resetdevice(struct usb_dev_state *ps) |
1da177e4 | 1330 | { |
d883f52e RG |
1331 | struct usb_host_config *actconfig = ps->dev->actconfig; |
1332 | struct usb_interface *interface; | |
1333 | int i, number; | |
1334 | ||
1335 | /* Don't allow a device reset if the process has dropped the | |
1336 | * privilege to do such things and any of the interfaces are | |
1337 | * currently claimed. | |
1338 | */ | |
1339 | if (ps->privileges_dropped && actconfig) { | |
1340 | for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) { | |
1341 | interface = actconfig->interface[i]; | |
1342 | number = interface->cur_altsetting->desc.bInterfaceNumber; | |
1343 | if (usb_interface_claimed(interface) && | |
1344 | !test_bit(number, &ps->ifclaimed)) { | |
1345 | dev_warn(&ps->dev->dev, | |
1346 | "usbfs: interface %d claimed by %s while '%s' resets device\n", | |
1347 | number, interface->dev.driver->name, current->comm); | |
1348 | return -EACCES; | |
1349 | } | |
1350 | } | |
1351 | } | |
1352 | ||
742120c6 | 1353 | return usb_reset_device(ps->dev); |
1da177e4 LT |
1354 | } |
1355 | ||
9b6f0c4b | 1356 | static int proc_setintf(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
1357 | { |
1358 | struct usbdevfs_setinterface setintf; | |
1359 | int ret; | |
1360 | ||
1361 | if (copy_from_user(&setintf, arg, sizeof(setintf))) | |
1362 | return -EFAULT; | |
135551ea KB |
1363 | ret = checkintf(ps, setintf.interface); |
1364 | if (ret) | |
1da177e4 | 1365 | return ret; |
5ec9c177 HG |
1366 | |
1367 | destroy_async_on_interface(ps, setintf.interface); | |
1368 | ||
1da177e4 LT |
1369 | return usb_set_interface(ps->dev, setintf.interface, |
1370 | setintf.altsetting); | |
1371 | } | |
1372 | ||
9b6f0c4b | 1373 | static int proc_setconfig(struct usb_dev_state *ps, void __user *arg) |
1da177e4 | 1374 | { |
3f141e2a | 1375 | int u; |
1da177e4 | 1376 | int status = 0; |
04e482ff | 1377 | struct usb_host_config *actconfig; |
1da177e4 | 1378 | |
3f141e2a | 1379 | if (get_user(u, (int __user *)arg)) |
1da177e4 LT |
1380 | return -EFAULT; |
1381 | ||
04e482ff GKH |
1382 | actconfig = ps->dev->actconfig; |
1383 | ||
1384 | /* Don't touch the device if any interfaces are claimed. | |
1385 | * It could interfere with other drivers' operations, and if | |
1da177e4 LT |
1386 | * an interface is claimed by usbfs it could easily deadlock. |
1387 | */ | |
04e482ff GKH |
1388 | if (actconfig) { |
1389 | int i; | |
1390 | ||
1391 | for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) { | |
1392 | if (usb_interface_claimed(actconfig->interface[i])) { | |
1393 | dev_warn(&ps->dev->dev, | |
72ebddb5 | 1394 | "usbfs: interface %d claimed by %s " |
1da177e4 LT |
1395 | "while '%s' sets config #%d\n", |
1396 | actconfig->interface[i] | |
1397 | ->cur_altsetting | |
1398 | ->desc.bInterfaceNumber, | |
72ebddb5 DB |
1399 | actconfig->interface[i] |
1400 | ->dev.driver->name, | |
1da177e4 | 1401 | current->comm, u); |
04e482ff | 1402 | status = -EBUSY; |
1da177e4 | 1403 | break; |
1da177e4 | 1404 | } |
04e482ff GKH |
1405 | } |
1406 | } | |
1da177e4 LT |
1407 | |
1408 | /* SET_CONFIGURATION is often abused as a "cheap" driver reset, | |
1409 | * so avoid usb_set_configuration()'s kick to sysfs | |
1410 | */ | |
1411 | if (status == 0) { | |
1412 | if (actconfig && actconfig->desc.bConfigurationValue == u) | |
1413 | status = usb_reset_configuration(ps->dev); | |
1414 | else | |
1415 | status = usb_set_configuration(ps->dev, u); | |
1416 | } | |
1417 | ||
1418 | return status; | |
1419 | } | |
1420 | ||
f7d34b44 SG |
1421 | static struct usb_memory * |
1422 | find_memory_area(struct usb_dev_state *ps, const struct usbdevfs_urb *uurb) | |
1423 | { | |
1424 | struct usb_memory *usbm = NULL, *iter; | |
1425 | unsigned long flags; | |
1426 | unsigned long uurb_start = (unsigned long)uurb->buffer; | |
1427 | ||
1428 | spin_lock_irqsave(&ps->lock, flags); | |
1429 | list_for_each_entry(iter, &ps->memory_list, memlist) { | |
1430 | if (uurb_start >= iter->vm_start && | |
1431 | uurb_start < iter->vm_start + iter->size) { | |
1432 | if (uurb->buffer_length > iter->vm_start + iter->size - | |
1433 | uurb_start) { | |
1434 | usbm = ERR_PTR(-EINVAL); | |
1435 | } else { | |
1436 | usbm = iter; | |
1437 | usbm->urb_use_count++; | |
1438 | } | |
1439 | break; | |
1440 | } | |
1441 | } | |
1442 | spin_unlock_irqrestore(&ps->lock, flags); | |
1443 | return usbm; | |
1444 | } | |
1445 | ||
9b6f0c4b | 1446 | static int proc_do_submiturb(struct usb_dev_state *ps, struct usbdevfs_urb *uurb, |
04e482ff GKH |
1447 | struct usbdevfs_iso_packet_desc __user *iso_frame_desc, |
1448 | void __user *arg) | |
1da177e4 LT |
1449 | { |
1450 | struct usbdevfs_iso_packet_desc *isopkt = NULL; | |
1451 | struct usb_host_endpoint *ep; | |
52fb743d | 1452 | struct async *as = NULL; |
1da177e4 LT |
1453 | struct usb_ctrlrequest *dr = NULL; |
1454 | unsigned int u, totlen, isofrmlen; | |
3d97ff63 | 1455 | int i, ret, is_in, num_sgs = 0, ifnum = -1; |
b2d03eb5 | 1456 | int number_of_packets = 0; |
948cd8c1 | 1457 | unsigned int stream_id = 0; |
3d97ff63 | 1458 | void *buf; |
1da177e4 | 1459 | |
14722ef4 AS |
1460 | if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP | |
1461 | USBDEVFS_URB_SHORT_NOT_OK | | |
01c6460f | 1462 | USBDEVFS_URB_BULK_CONTINUATION | |
14722ef4 AS |
1463 | USBDEVFS_URB_NO_FSBR | |
1464 | USBDEVFS_URB_ZERO_PACKET | | |
1465 | USBDEVFS_URB_NO_INTERRUPT)) | |
1da177e4 | 1466 | return -EINVAL; |
9180135b | 1467 | if (uurb->buffer_length > 0 && !uurb->buffer) |
1da177e4 | 1468 | return -EINVAL; |
04e482ff GKH |
1469 | if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL && |
1470 | (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) { | |
1471 | ifnum = findintfep(ps->dev, uurb->endpoint); | |
1472 | if (ifnum < 0) | |
1da177e4 | 1473 | return ifnum; |
04e482ff GKH |
1474 | ret = checkintf(ps, ifnum); |
1475 | if (ret) | |
1da177e4 LT |
1476 | return ret; |
1477 | } | |
2fec32b0 | 1478 | ep = ep_to_host_endpoint(ps->dev, uurb->endpoint); |
1da177e4 LT |
1479 | if (!ep) |
1480 | return -ENOENT; | |
2fec32b0 | 1481 | is_in = (uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0; |
add1aaea AS |
1482 | |
1483 | u = 0; | |
f355e830 | 1484 | switch (uurb->type) { |
1da177e4 | 1485 | case USBDEVFS_URB_TYPE_CONTROL: |
93cf9b90 | 1486 | if (!usb_endpoint_xfer_control(&ep->desc)) |
1da177e4 | 1487 | return -EINVAL; |
add1aaea AS |
1488 | /* min 8 byte setup packet */ |
1489 | if (uurb->buffer_length < 8) | |
1da177e4 | 1490 | return -EINVAL; |
04e482ff GKH |
1491 | dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL); |
1492 | if (!dr) | |
1da177e4 LT |
1493 | return -ENOMEM; |
1494 | if (copy_from_user(dr, uurb->buffer, 8)) { | |
52fb743d AS |
1495 | ret = -EFAULT; |
1496 | goto error; | |
1da177e4 LT |
1497 | } |
1498 | if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) { | |
52fb743d AS |
1499 | ret = -EINVAL; |
1500 | goto error; | |
1da177e4 | 1501 | } |
393cbb51 | 1502 | ret = check_ctrlrecip(ps, dr->bRequestType, dr->bRequest, |
04e482ff | 1503 | le16_to_cpup(&dr->wIndex)); |
52fb743d AS |
1504 | if (ret) |
1505 | goto error; | |
1da177e4 LT |
1506 | uurb->buffer_length = le16_to_cpup(&dr->wLength); |
1507 | uurb->buffer += 8; | |
93cf9b90 AS |
1508 | if ((dr->bRequestType & USB_DIR_IN) && uurb->buffer_length) { |
1509 | is_in = 1; | |
1510 | uurb->endpoint |= USB_DIR_IN; | |
1511 | } else { | |
1512 | is_in = 0; | |
1513 | uurb->endpoint &= ~USB_DIR_IN; | |
1514 | } | |
0880aef4 CF |
1515 | snoop(&ps->dev->dev, "control urb: bRequestType=%02x " |
1516 | "bRequest=%02x wValue=%04x " | |
1517 | "wIndex=%04x wLength=%04x\n", | |
1518 | dr->bRequestType, dr->bRequest, | |
1519 | __le16_to_cpup(&dr->wValue), | |
1520 | __le16_to_cpup(&dr->wIndex), | |
1521 | __le16_to_cpup(&dr->wLength)); | |
add1aaea | 1522 | u = sizeof(struct usb_ctrlrequest); |
1da177e4 LT |
1523 | break; |
1524 | ||
1525 | case USBDEVFS_URB_TYPE_BULK: | |
93cf9b90 | 1526 | switch (usb_endpoint_type(&ep->desc)) { |
1da177e4 LT |
1527 | case USB_ENDPOINT_XFER_CONTROL: |
1528 | case USB_ENDPOINT_XFER_ISOC: | |
1529 | return -EINVAL; | |
f661c6f8 AS |
1530 | case USB_ENDPOINT_XFER_INT: |
1531 | /* allow single-shot interrupt transfers */ | |
1532 | uurb->type = USBDEVFS_URB_TYPE_INTERRUPT; | |
1533 | goto interrupt_urb; | |
1da177e4 | 1534 | } |
3d97ff63 HG |
1535 | num_sgs = DIV_ROUND_UP(uurb->buffer_length, USB_SG_SIZE); |
1536 | if (num_sgs == 1 || num_sgs > ps->dev->bus->sg_tablesize) | |
1537 | num_sgs = 0; | |
948cd8c1 HG |
1538 | if (ep->streams) |
1539 | stream_id = uurb->stream_id; | |
1da177e4 LT |
1540 | break; |
1541 | ||
f661c6f8 AS |
1542 | case USBDEVFS_URB_TYPE_INTERRUPT: |
1543 | if (!usb_endpoint_xfer_int(&ep->desc)) | |
1544 | return -EINVAL; | |
1545 | interrupt_urb: | |
f661c6f8 AS |
1546 | break; |
1547 | ||
1da177e4 LT |
1548 | case USBDEVFS_URB_TYPE_ISO: |
1549 | /* arbitrary limit */ | |
04e482ff GKH |
1550 | if (uurb->number_of_packets < 1 || |
1551 | uurb->number_of_packets > 128) | |
1da177e4 | 1552 | return -EINVAL; |
93cf9b90 | 1553 | if (!usb_endpoint_xfer_isoc(&ep->desc)) |
1da177e4 | 1554 | return -EINVAL; |
b2d03eb5 | 1555 | number_of_packets = uurb->number_of_packets; |
04e482ff | 1556 | isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * |
b2d03eb5 | 1557 | number_of_packets; |
73a02d32 RP |
1558 | isopkt = memdup_user(iso_frame_desc, isofrmlen); |
1559 | if (IS_ERR(isopkt)) { | |
1560 | ret = PTR_ERR(isopkt); | |
1561 | isopkt = NULL; | |
52fb743d | 1562 | goto error; |
1da177e4 | 1563 | } |
b2d03eb5 | 1564 | for (totlen = u = 0; u < number_of_packets; u++) { |
e2e2f0ea FM |
1565 | /* |
1566 | * arbitrary limit need for USB 3.0 | |
1567 | * bMaxBurst (0~15 allowed, 1~16 packets) | |
1568 | * bmAttributes (bit 1:0, mult 0~2, 1~3 packets) | |
1569 | * sizemax: 1024 * 16 * 3 = 49152 | |
1570 | */ | |
1571 | if (isopkt[u].length > 49152) { | |
52fb743d AS |
1572 | ret = -EINVAL; |
1573 | goto error; | |
1da177e4 LT |
1574 | } |
1575 | totlen += isopkt[u].length; | |
1576 | } | |
add1aaea | 1577 | u *= sizeof(struct usb_iso_packet_descriptor); |
1da177e4 LT |
1578 | uurb->buffer_length = totlen; |
1579 | break; | |
1580 | ||
1da177e4 LT |
1581 | default: |
1582 | return -EINVAL; | |
1583 | } | |
add1aaea | 1584 | |
3f5eb8d5 | 1585 | if (uurb->buffer_length >= USBFS_XFER_MAX) { |
add1aaea AS |
1586 | ret = -EINVAL; |
1587 | goto error; | |
1588 | } | |
9180135b AS |
1589 | if (uurb->buffer_length > 0 && |
1590 | !access_ok(is_in ? VERIFY_WRITE : VERIFY_READ, | |
1591 | uurb->buffer, uurb->buffer_length)) { | |
52fb743d AS |
1592 | ret = -EFAULT; |
1593 | goto error; | |
1da177e4 | 1594 | } |
b2d03eb5 | 1595 | as = alloc_async(number_of_packets); |
9180135b | 1596 | if (!as) { |
52fb743d AS |
1597 | ret = -ENOMEM; |
1598 | goto error; | |
1da177e4 | 1599 | } |
3d97ff63 | 1600 | |
f7d34b44 SG |
1601 | as->usbm = find_memory_area(ps, uurb); |
1602 | if (IS_ERR(as->usbm)) { | |
1603 | ret = PTR_ERR(as->usbm); | |
1604 | as->usbm = NULL; | |
1605 | goto error; | |
1606 | } | |
1607 | ||
1608 | /* do not use SG buffers when memory mapped segments | |
1609 | * are in use | |
1610 | */ | |
1611 | if (as->usbm) | |
1612 | num_sgs = 0; | |
1613 | ||
3d97ff63 HG |
1614 | u += sizeof(struct async) + sizeof(struct urb) + uurb->buffer_length + |
1615 | num_sgs * sizeof(struct scatterlist); | |
add1aaea AS |
1616 | ret = usbfs_increase_memory_usage(u); |
1617 | if (ret) | |
1618 | goto error; | |
1619 | as->mem_usage = u; | |
1620 | ||
3d97ff63 HG |
1621 | if (num_sgs) { |
1622 | as->urb->sg = kmalloc(num_sgs * sizeof(struct scatterlist), | |
1623 | GFP_KERNEL); | |
1624 | if (!as->urb->sg) { | |
1625 | ret = -ENOMEM; | |
1626 | goto error; | |
1627 | } | |
1628 | as->urb->num_sgs = num_sgs; | |
1629 | sg_init_table(as->urb->sg, as->urb->num_sgs); | |
1630 | ||
1631 | totlen = uurb->buffer_length; | |
1632 | for (i = 0; i < as->urb->num_sgs; i++) { | |
1633 | u = (totlen > USB_SG_SIZE) ? USB_SG_SIZE : totlen; | |
1634 | buf = kmalloc(u, GFP_KERNEL); | |
1635 | if (!buf) { | |
1636 | ret = -ENOMEM; | |
1637 | goto error; | |
1638 | } | |
1639 | sg_set_buf(&as->urb->sg[i], buf, u); | |
1640 | ||
1641 | if (!is_in) { | |
1642 | if (copy_from_user(buf, uurb->buffer, u)) { | |
1643 | ret = -EFAULT; | |
1644 | goto error; | |
1645 | } | |
01463900 | 1646 | uurb->buffer += u; |
3d97ff63 HG |
1647 | } |
1648 | totlen -= u; | |
1649 | } | |
1650 | } else if (uurb->buffer_length > 0) { | |
f7d34b44 SG |
1651 | if (as->usbm) { |
1652 | unsigned long uurb_start = (unsigned long)uurb->buffer; | |
3d97ff63 | 1653 | |
f7d34b44 SG |
1654 | as->urb->transfer_buffer = as->usbm->mem + |
1655 | (uurb_start - as->usbm->vm_start); | |
1656 | } else { | |
1657 | as->urb->transfer_buffer = kmalloc(uurb->buffer_length, | |
1658 | GFP_KERNEL); | |
1659 | if (!as->urb->transfer_buffer) { | |
1660 | ret = -ENOMEM; | |
3d97ff63 HG |
1661 | goto error; |
1662 | } | |
f7d34b44 SG |
1663 | if (!is_in) { |
1664 | if (copy_from_user(as->urb->transfer_buffer, | |
1665 | uurb->buffer, | |
1666 | uurb->buffer_length)) { | |
1667 | ret = -EFAULT; | |
1668 | goto error; | |
1669 | } | |
1670 | } else if (uurb->type == USBDEVFS_URB_TYPE_ISO) { | |
1671 | /* | |
1672 | * Isochronous input data may end up being | |
1673 | * discontiguous if some of the packets are | |
1674 | * short. Clear the buffer so that the gaps | |
1675 | * don't leak kernel data to userspace. | |
1676 | */ | |
1677 | memset(as->urb->transfer_buffer, 0, | |
1678 | uurb->buffer_length); | |
1679 | } | |
3d97ff63 | 1680 | } |
9180135b | 1681 | } |
04e482ff GKH |
1682 | as->urb->dev = ps->dev; |
1683 | as->urb->pipe = (uurb->type << 30) | | |
93cf9b90 AS |
1684 | __create_pipe(ps->dev, uurb->endpoint & 0xf) | |
1685 | (uurb->endpoint & USB_DIR_IN); | |
14722ef4 AS |
1686 | |
1687 | /* This tedious sequence is necessary because the URB_* flags | |
1688 | * are internal to the kernel and subject to change, whereas | |
1689 | * the USBDEVFS_URB_* flags are a user API and must not be changed. | |
1690 | */ | |
1691 | u = (is_in ? URB_DIR_IN : URB_DIR_OUT); | |
1692 | if (uurb->flags & USBDEVFS_URB_ISO_ASAP) | |
1693 | u |= URB_ISO_ASAP; | |
d310d05f | 1694 | if (uurb->flags & USBDEVFS_URB_SHORT_NOT_OK && is_in) |
14722ef4 AS |
1695 | u |= URB_SHORT_NOT_OK; |
1696 | if (uurb->flags & USBDEVFS_URB_NO_FSBR) | |
1697 | u |= URB_NO_FSBR; | |
1698 | if (uurb->flags & USBDEVFS_URB_ZERO_PACKET) | |
1699 | u |= URB_ZERO_PACKET; | |
1700 | if (uurb->flags & USBDEVFS_URB_NO_INTERRUPT) | |
1701 | u |= URB_NO_INTERRUPT; | |
1702 | as->urb->transfer_flags = u; | |
1703 | ||
1da177e4 | 1704 | as->urb->transfer_buffer_length = uurb->buffer_length; |
04e482ff | 1705 | as->urb->setup_packet = (unsigned char *)dr; |
52fb743d | 1706 | dr = NULL; |
1da177e4 | 1707 | as->urb->start_frame = uurb->start_frame; |
b2d03eb5 | 1708 | as->urb->number_of_packets = number_of_packets; |
948cd8c1 | 1709 | as->urb->stream_id = stream_id; |
97b9eb91 AS |
1710 | if (uurb->type == USBDEVFS_URB_TYPE_ISO || |
1711 | ps->dev->speed == USB_SPEED_HIGH) | |
1712 | as->urb->interval = 1 << min(15, ep->desc.bInterval - 1); | |
1713 | else | |
1714 | as->urb->interval = ep->desc.bInterval; | |
04e482ff GKH |
1715 | as->urb->context = as; |
1716 | as->urb->complete = async_completed; | |
b2d03eb5 | 1717 | for (totlen = u = 0; u < number_of_packets; u++) { |
1da177e4 LT |
1718 | as->urb->iso_frame_desc[u].offset = totlen; |
1719 | as->urb->iso_frame_desc[u].length = isopkt[u].length; | |
1720 | totlen += isopkt[u].length; | |
1721 | } | |
6fd19f4b | 1722 | kfree(isopkt); |
52fb743d | 1723 | isopkt = NULL; |
1da177e4 | 1724 | as->ps = ps; |
04e482ff | 1725 | as->userurb = arg; |
f7d34b44 SG |
1726 | if (as->usbm) { |
1727 | unsigned long uurb_start = (unsigned long)uurb->buffer; | |
1728 | ||
1729 | as->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
1730 | as->urb->transfer_dma = as->usbm->dma_handle + | |
1731 | (uurb_start - as->usbm->vm_start); | |
1732 | } else if (is_in && uurb->buffer_length > 0) | |
1da177e4 | 1733 | as->userbuffer = uurb->buffer; |
1da177e4 LT |
1734 | as->signr = uurb->signr; |
1735 | as->ifnum = ifnum; | |
2425c08b | 1736 | as->pid = get_pid(task_pid(current)); |
d178bc3a | 1737 | as->cred = get_current_cred(); |
7a01955f | 1738 | security_task_getsecid(current, &as->secid); |
4c6e8971 | 1739 | snoop_urb(ps->dev, as->userurb, as->urb->pipe, |
0880aef4 | 1740 | as->urb->transfer_buffer_length, 0, SUBMIT, |
3d97ff63 HG |
1741 | NULL, 0); |
1742 | if (!is_in) | |
1743 | snoop_urb_data(as->urb, as->urb->transfer_buffer_length); | |
1744 | ||
04e482ff | 1745 | async_newpending(as); |
01c6460f AS |
1746 | |
1747 | if (usb_endpoint_xfer_bulk(&ep->desc)) { | |
1748 | spin_lock_irq(&ps->lock); | |
1749 | ||
1750 | /* Not exactly the endpoint address; the direction bit is | |
1751 | * shifted to the 0x10 position so that the value will be | |
1752 | * between 0 and 31. | |
1753 | */ | |
1754 | as->bulk_addr = usb_endpoint_num(&ep->desc) | | |
1755 | ((ep->desc.bEndpointAddress & USB_ENDPOINT_DIR_MASK) | |
1756 | >> 3); | |
1757 | ||
1758 | /* If this bulk URB is the start of a new transfer, re-enable | |
1759 | * the endpoint. Otherwise mark it as a continuation URB. | |
1760 | */ | |
1761 | if (uurb->flags & USBDEVFS_URB_BULK_CONTINUATION) | |
1762 | as->bulk_status = AS_CONTINUATION; | |
1763 | else | |
1764 | ps->disabled_bulk_eps &= ~(1 << as->bulk_addr); | |
1765 | ||
1766 | /* Don't accept continuation URBs if the endpoint is | |
1767 | * disabled because of an earlier error. | |
1768 | */ | |
1769 | if (ps->disabled_bulk_eps & (1 << as->bulk_addr)) | |
1770 | ret = -EREMOTEIO; | |
1771 | else | |
1772 | ret = usb_submit_urb(as->urb, GFP_ATOMIC); | |
1773 | spin_unlock_irq(&ps->lock); | |
1774 | } else { | |
1775 | ret = usb_submit_urb(as->urb, GFP_KERNEL); | |
1776 | } | |
1777 | ||
1778 | if (ret) { | |
04e482ff GKH |
1779 | dev_printk(KERN_DEBUG, &ps->dev->dev, |
1780 | "usbfs: usb_submit_urb returned %d\n", ret); | |
4c6e8971 | 1781 | snoop_urb(ps->dev, as->userurb, as->urb->pipe, |
0880aef4 | 1782 | 0, ret, COMPLETE, NULL, 0); |
04e482ff | 1783 | async_removepending(as); |
52fb743d | 1784 | goto error; |
04e482ff GKH |
1785 | } |
1786 | return 0; | |
52fb743d AS |
1787 | |
1788 | error: | |
f7d34b44 SG |
1789 | if (as && as->usbm) |
1790 | dec_usb_memory_use_count(as->usbm, &as->usbm->urb_use_count); | |
52fb743d AS |
1791 | kfree(isopkt); |
1792 | kfree(dr); | |
1793 | if (as) | |
1794 | free_async(as); | |
1795 | return ret; | |
1da177e4 LT |
1796 | } |
1797 | ||
9b6f0c4b | 1798 | static int proc_submiturb(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
1799 | { |
1800 | struct usbdevfs_urb uurb; | |
1801 | ||
1802 | if (copy_from_user(&uurb, arg, sizeof(uurb))) | |
1803 | return -EFAULT; | |
1804 | ||
04e482ff GKH |
1805 | return proc_do_submiturb(ps, &uurb, |
1806 | (((struct usbdevfs_urb __user *)arg)->iso_frame_desc), | |
1807 | arg); | |
1da177e4 LT |
1808 | } |
1809 | ||
9b6f0c4b | 1810 | static int proc_unlinkurb(struct usb_dev_state *ps, void __user *arg) |
1da177e4 | 1811 | { |
4e09dcf2 | 1812 | struct urb *urb; |
1da177e4 | 1813 | struct async *as; |
4e09dcf2 | 1814 | unsigned long flags; |
1da177e4 | 1815 | |
4e09dcf2 | 1816 | spin_lock_irqsave(&ps->lock, flags); |
1da177e4 | 1817 | as = async_getpending(ps, arg); |
4e09dcf2 HL |
1818 | if (!as) { |
1819 | spin_unlock_irqrestore(&ps->lock, flags); | |
1da177e4 | 1820 | return -EINVAL; |
4e09dcf2 HL |
1821 | } |
1822 | ||
1823 | urb = as->urb; | |
1824 | usb_get_urb(urb); | |
1825 | spin_unlock_irqrestore(&ps->lock, flags); | |
1826 | ||
1827 | usb_kill_urb(urb); | |
1828 | usb_put_urb(urb); | |
1829 | ||
1da177e4 LT |
1830 | return 0; |
1831 | } | |
1832 | ||
1833 | static int processcompl(struct async *as, void __user * __user *arg) | |
1834 | { | |
1835 | struct urb *urb = as->urb; | |
1836 | struct usbdevfs_urb __user *userurb = as->userurb; | |
1837 | void __user *addr = as->userurb; | |
1838 | unsigned int i; | |
1839 | ||
7152b592 | 1840 | if (as->userbuffer && urb->actual_length) { |
3d97ff63 | 1841 | if (copy_urb_data_to_user(as->userbuffer, urb)) |
d794a021 | 1842 | goto err_out; |
7152b592 | 1843 | } |
e015268d | 1844 | if (put_user(as->status, &userurb->status)) |
d794a021 | 1845 | goto err_out; |
1da177e4 | 1846 | if (put_user(urb->actual_length, &userurb->actual_length)) |
d794a021 | 1847 | goto err_out; |
1da177e4 | 1848 | if (put_user(urb->error_count, &userurb->error_count)) |
d794a021 | 1849 | goto err_out; |
1da177e4 | 1850 | |
93cf9b90 | 1851 | if (usb_endpoint_xfer_isoc(&urb->ep->desc)) { |
668a9541 CL |
1852 | for (i = 0; i < urb->number_of_packets; i++) { |
1853 | if (put_user(urb->iso_frame_desc[i].actual_length, | |
1854 | &userurb->iso_frame_desc[i].actual_length)) | |
d794a021 | 1855 | goto err_out; |
668a9541 CL |
1856 | if (put_user(urb->iso_frame_desc[i].status, |
1857 | &userurb->iso_frame_desc[i].status)) | |
d794a021 | 1858 | goto err_out; |
668a9541 | 1859 | } |
1da177e4 LT |
1860 | } |
1861 | ||
1da177e4 LT |
1862 | if (put_user(addr, (void __user * __user *)arg)) |
1863 | return -EFAULT; | |
1864 | return 0; | |
d794a021 ON |
1865 | |
1866 | err_out: | |
d794a021 | 1867 | return -EFAULT; |
1da177e4 LT |
1868 | } |
1869 | ||
9b6f0c4b | 1870 | static struct async *reap_as(struct usb_dev_state *ps) |
1da177e4 | 1871 | { |
04e482ff | 1872 | DECLARE_WAITQUEUE(wait, current); |
1da177e4 LT |
1873 | struct async *as = NULL; |
1874 | struct usb_device *dev = ps->dev; | |
1875 | ||
1876 | add_wait_queue(&ps->wait, &wait); | |
1877 | for (;;) { | |
1878 | __set_current_state(TASK_INTERRUPTIBLE); | |
04e482ff | 1879 | as = async_getcompleted(ps); |
3f2cee73 | 1880 | if (as || !connected(ps)) |
1da177e4 LT |
1881 | break; |
1882 | if (signal_pending(current)) | |
1883 | break; | |
1884 | usb_unlock_device(dev); | |
1885 | schedule(); | |
1886 | usb_lock_device(dev); | |
1887 | } | |
1888 | remove_wait_queue(&ps->wait, &wait); | |
1889 | set_current_state(TASK_RUNNING); | |
1890 | return as; | |
1891 | } | |
1892 | ||
9b6f0c4b | 1893 | static int proc_reapurb(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
1894 | { |
1895 | struct async *as = reap_as(ps); | |
a016a816 | 1896 | |
ddeee0b2 | 1897 | if (as) { |
a016a816 AS |
1898 | int retval; |
1899 | ||
1900 | snoop(&ps->dev->dev, "reap %p\n", as->userurb); | |
1901 | retval = processcompl(as, (void __user * __user *)arg); | |
ddeee0b2 LT |
1902 | free_async(as); |
1903 | return retval; | |
1904 | } | |
1da177e4 LT |
1905 | if (signal_pending(current)) |
1906 | return -EINTR; | |
3f2cee73 | 1907 | return -ENODEV; |
1da177e4 LT |
1908 | } |
1909 | ||
9b6f0c4b | 1910 | static int proc_reapurbnonblock(struct usb_dev_state *ps, void __user *arg) |
1da177e4 | 1911 | { |
ddeee0b2 | 1912 | int retval; |
1da177e4 LT |
1913 | struct async *as; |
1914 | ||
ddeee0b2 | 1915 | as = async_getcompleted(ps); |
ddeee0b2 | 1916 | if (as) { |
a016a816 | 1917 | snoop(&ps->dev->dev, "reap %p\n", as->userurb); |
ddeee0b2 LT |
1918 | retval = processcompl(as, (void __user * __user *)arg); |
1919 | free_async(as); | |
3f2cee73 AS |
1920 | } else { |
1921 | retval = (connected(ps) ? -EAGAIN : -ENODEV); | |
ddeee0b2 LT |
1922 | } |
1923 | return retval; | |
1da177e4 LT |
1924 | } |
1925 | ||
1926 | #ifdef CONFIG_COMPAT | |
9b6f0c4b | 1927 | static int proc_control_compat(struct usb_dev_state *ps, |
637e8a60 AB |
1928 | struct usbdevfs_ctrltransfer32 __user *p32) |
1929 | { | |
5b32c385 MB |
1930 | struct usbdevfs_ctrltransfer __user *p; |
1931 | __u32 udata; | |
1932 | p = compat_alloc_user_space(sizeof(*p)); | |
1933 | if (copy_in_user(p, p32, (sizeof(*p32) - sizeof(compat_caddr_t))) || | |
1934 | get_user(udata, &p32->data) || | |
637e8a60 AB |
1935 | put_user(compat_ptr(udata), &p->data)) |
1936 | return -EFAULT; | |
5b32c385 | 1937 | return proc_control(ps, p); |
637e8a60 AB |
1938 | } |
1939 | ||
9b6f0c4b | 1940 | static int proc_bulk_compat(struct usb_dev_state *ps, |
637e8a60 AB |
1941 | struct usbdevfs_bulktransfer32 __user *p32) |
1942 | { | |
06793f2d MB |
1943 | struct usbdevfs_bulktransfer __user *p; |
1944 | compat_uint_t n; | |
1945 | compat_caddr_t addr; | |
637e8a60 | 1946 | |
06793f2d | 1947 | p = compat_alloc_user_space(sizeof(*p)); |
637e8a60 | 1948 | |
06793f2d MB |
1949 | if (get_user(n, &p32->ep) || put_user(n, &p->ep) || |
1950 | get_user(n, &p32->len) || put_user(n, &p->len) || | |
1951 | get_user(n, &p32->timeout) || put_user(n, &p->timeout) || | |
1952 | get_user(addr, &p32->data) || put_user(compat_ptr(addr), &p->data)) | |
1953 | return -EFAULT; | |
637e8a60 | 1954 | |
06793f2d | 1955 | return proc_bulk(ps, p); |
637e8a60 | 1956 | } |
9b6f0c4b | 1957 | static int proc_disconnectsignal_compat(struct usb_dev_state *ps, void __user *arg) |
637e8a60 AB |
1958 | { |
1959 | struct usbdevfs_disconnectsignal32 ds; | |
1960 | ||
1961 | if (copy_from_user(&ds, arg, sizeof(ds))) | |
1962 | return -EFAULT; | |
1963 | ps->discsignr = ds.signr; | |
1964 | ps->disccontext = compat_ptr(ds.context); | |
1965 | return 0; | |
1966 | } | |
1da177e4 LT |
1967 | |
1968 | static int get_urb32(struct usbdevfs_urb *kurb, | |
1969 | struct usbdevfs_urb32 __user *uurb) | |
1970 | { | |
1971 | __u32 uptr; | |
18753ebc MB |
1972 | if (!access_ok(VERIFY_READ, uurb, sizeof(*uurb)) || |
1973 | __get_user(kurb->type, &uurb->type) || | |
1da177e4 LT |
1974 | __get_user(kurb->endpoint, &uurb->endpoint) || |
1975 | __get_user(kurb->status, &uurb->status) || | |
1976 | __get_user(kurb->flags, &uurb->flags) || | |
1977 | __get_user(kurb->buffer_length, &uurb->buffer_length) || | |
1978 | __get_user(kurb->actual_length, &uurb->actual_length) || | |
1979 | __get_user(kurb->start_frame, &uurb->start_frame) || | |
1980 | __get_user(kurb->number_of_packets, &uurb->number_of_packets) || | |
1981 | __get_user(kurb->error_count, &uurb->error_count) || | |
1982 | __get_user(kurb->signr, &uurb->signr)) | |
1983 | return -EFAULT; | |
1984 | ||
1985 | if (__get_user(uptr, &uurb->buffer)) | |
1986 | return -EFAULT; | |
1987 | kurb->buffer = compat_ptr(uptr); | |
ed0c7720 | 1988 | if (__get_user(uptr, &uurb->usercontext)) |
1da177e4 LT |
1989 | return -EFAULT; |
1990 | kurb->usercontext = compat_ptr(uptr); | |
1991 | ||
1992 | return 0; | |
1993 | } | |
1994 | ||
9b6f0c4b | 1995 | static int proc_submiturb_compat(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
1996 | { |
1997 | struct usbdevfs_urb uurb; | |
1998 | ||
04e482ff | 1999 | if (get_urb32(&uurb, (struct usbdevfs_urb32 __user *)arg)) |
1da177e4 LT |
2000 | return -EFAULT; |
2001 | ||
04e482ff GKH |
2002 | return proc_do_submiturb(ps, &uurb, |
2003 | ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc, | |
2004 | arg); | |
1da177e4 LT |
2005 | } |
2006 | ||
2007 | static int processcompl_compat(struct async *as, void __user * __user *arg) | |
2008 | { | |
2009 | struct urb *urb = as->urb; | |
2010 | struct usbdevfs_urb32 __user *userurb = as->userurb; | |
2011 | void __user *addr = as->userurb; | |
2012 | unsigned int i; | |
2013 | ||
2102e06a | 2014 | if (as->userbuffer && urb->actual_length) { |
3d97ff63 | 2015 | if (copy_urb_data_to_user(as->userbuffer, urb)) |
1da177e4 | 2016 | return -EFAULT; |
2102e06a | 2017 | } |
e015268d | 2018 | if (put_user(as->status, &userurb->status)) |
1da177e4 LT |
2019 | return -EFAULT; |
2020 | if (put_user(urb->actual_length, &userurb->actual_length)) | |
2021 | return -EFAULT; | |
2022 | if (put_user(urb->error_count, &userurb->error_count)) | |
2023 | return -EFAULT; | |
2024 | ||
93cf9b90 | 2025 | if (usb_endpoint_xfer_isoc(&urb->ep->desc)) { |
668a9541 CL |
2026 | for (i = 0; i < urb->number_of_packets; i++) { |
2027 | if (put_user(urb->iso_frame_desc[i].actual_length, | |
2028 | &userurb->iso_frame_desc[i].actual_length)) | |
2029 | return -EFAULT; | |
2030 | if (put_user(urb->iso_frame_desc[i].status, | |
2031 | &userurb->iso_frame_desc[i].status)) | |
2032 | return -EFAULT; | |
2033 | } | |
1da177e4 LT |
2034 | } |
2035 | ||
c714de5d | 2036 | if (put_user(ptr_to_compat(addr), (u32 __user *)arg)) |
1da177e4 LT |
2037 | return -EFAULT; |
2038 | return 0; | |
2039 | } | |
2040 | ||
9b6f0c4b | 2041 | static int proc_reapurb_compat(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
2042 | { |
2043 | struct async *as = reap_as(ps); | |
a016a816 | 2044 | |
ddeee0b2 | 2045 | if (as) { |
a016a816 AS |
2046 | int retval; |
2047 | ||
2048 | snoop(&ps->dev->dev, "reap %p\n", as->userurb); | |
2049 | retval = processcompl_compat(as, (void __user * __user *)arg); | |
ddeee0b2 LT |
2050 | free_async(as); |
2051 | return retval; | |
2052 | } | |
1da177e4 LT |
2053 | if (signal_pending(current)) |
2054 | return -EINTR; | |
3f2cee73 | 2055 | return -ENODEV; |
1da177e4 LT |
2056 | } |
2057 | ||
9b6f0c4b | 2058 | static int proc_reapurbnonblock_compat(struct usb_dev_state *ps, void __user *arg) |
1da177e4 | 2059 | { |
ddeee0b2 | 2060 | int retval; |
1da177e4 LT |
2061 | struct async *as; |
2062 | ||
ddeee0b2 LT |
2063 | as = async_getcompleted(ps); |
2064 | if (as) { | |
a016a816 | 2065 | snoop(&ps->dev->dev, "reap %p\n", as->userurb); |
ddeee0b2 LT |
2066 | retval = processcompl_compat(as, (void __user * __user *)arg); |
2067 | free_async(as); | |
3f2cee73 AS |
2068 | } else { |
2069 | retval = (connected(ps) ? -EAGAIN : -ENODEV); | |
ddeee0b2 LT |
2070 | } |
2071 | return retval; | |
1da177e4 LT |
2072 | } |
2073 | ||
637e8a60 | 2074 | |
1da177e4 LT |
2075 | #endif |
2076 | ||
9b6f0c4b | 2077 | static int proc_disconnectsignal(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
2078 | { |
2079 | struct usbdevfs_disconnectsignal ds; | |
2080 | ||
2081 | if (copy_from_user(&ds, arg, sizeof(ds))) | |
2082 | return -EFAULT; | |
1da177e4 LT |
2083 | ps->discsignr = ds.signr; |
2084 | ps->disccontext = ds.context; | |
2085 | return 0; | |
2086 | } | |
2087 | ||
9b6f0c4b | 2088 | static int proc_claiminterface(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
2089 | { |
2090 | unsigned int ifnum; | |
2091 | ||
2092 | if (get_user(ifnum, (unsigned int __user *)arg)) | |
2093 | return -EFAULT; | |
2094 | return claimintf(ps, ifnum); | |
2095 | } | |
2096 | ||
9b6f0c4b | 2097 | static int proc_releaseinterface(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
2098 | { |
2099 | unsigned int ifnum; | |
2100 | int ret; | |
2101 | ||
2102 | if (get_user(ifnum, (unsigned int __user *)arg)) | |
2103 | return -EFAULT; | |
135551ea KB |
2104 | ret = releaseintf(ps, ifnum); |
2105 | if (ret < 0) | |
1da177e4 | 2106 | return ret; |
64f10edf | 2107 | destroy_async_on_interface(ps, ifnum); |
1da177e4 LT |
2108 | return 0; |
2109 | } | |
2110 | ||
9b6f0c4b | 2111 | static int proc_ioctl(struct usb_dev_state *ps, struct usbdevfs_ioctl *ctl) |
1da177e4 | 2112 | { |
1da177e4 LT |
2113 | int size; |
2114 | void *buf = NULL; | |
2115 | int retval = 0; | |
2116 | struct usb_interface *intf = NULL; | |
2117 | struct usb_driver *driver = NULL; | |
1da177e4 | 2118 | |
d883f52e RG |
2119 | if (ps->privileges_dropped) |
2120 | return -EACCES; | |
2121 | ||
c36fc889 | 2122 | /* alloc buffer */ |
135551ea KB |
2123 | size = _IOC_SIZE(ctl->ioctl_code); |
2124 | if (size > 0) { | |
4baf0df7 Tİ |
2125 | buf = kmalloc(size, GFP_KERNEL); |
2126 | if (buf == NULL) | |
1da177e4 | 2127 | return -ENOMEM; |
c36fc889 | 2128 | if ((_IOC_DIR(ctl->ioctl_code) & _IOC_WRITE)) { |
04e482ff | 2129 | if (copy_from_user(buf, ctl->data, size)) { |
6fd19f4b | 2130 | kfree(buf); |
1da177e4 LT |
2131 | return -EFAULT; |
2132 | } | |
2133 | } else { | |
04e482ff | 2134 | memset(buf, 0, size); |
1da177e4 LT |
2135 | } |
2136 | } | |
2137 | ||
349710c3 | 2138 | if (!connected(ps)) { |
6fd19f4b | 2139 | kfree(buf); |
1da177e4 LT |
2140 | return -ENODEV; |
2141 | } | |
2142 | ||
2143 | if (ps->dev->state != USB_STATE_CONFIGURED) | |
2144 | retval = -EHOSTUNREACH; | |
04e482ff GKH |
2145 | else if (!(intf = usb_ifnum_to_if(ps->dev, ctl->ifno))) |
2146 | retval = -EINVAL; | |
c36fc889 | 2147 | else switch (ctl->ioctl_code) { |
1da177e4 LT |
2148 | |
2149 | /* disconnect kernel driver from interface */ | |
2150 | case USBDEVFS_DISCONNECT: | |
1da177e4 LT |
2151 | if (intf->dev.driver) { |
2152 | driver = to_usb_driver(intf->dev.driver); | |
04e482ff | 2153 | dev_dbg(&intf->dev, "disconnect by usbfs\n"); |
1da177e4 LT |
2154 | usb_driver_release_interface(driver, intf); |
2155 | } else | |
2156 | retval = -ENODATA; | |
1da177e4 LT |
2157 | break; |
2158 | ||
2159 | /* let kernel drivers try to (re)bind to the interface */ | |
2160 | case USBDEVFS_CONNECT: | |
885e9747 AS |
2161 | if (!intf->dev.driver) |
2162 | retval = device_attach(&intf->dev); | |
2163 | else | |
2164 | retval = -EBUSY; | |
1da177e4 LT |
2165 | break; |
2166 | ||
2167 | /* talk directly to the interface's driver */ | |
2168 | default: | |
1da177e4 LT |
2169 | if (intf->dev.driver) |
2170 | driver = to_usb_driver(intf->dev.driver); | |
c532b29a | 2171 | if (driver == NULL || driver->unlocked_ioctl == NULL) { |
1da177e4 LT |
2172 | retval = -ENOTTY; |
2173 | } else { | |
c532b29a | 2174 | retval = driver->unlocked_ioctl(intf, ctl->ioctl_code, buf); |
1da177e4 LT |
2175 | if (retval == -ENOIOCTLCMD) |
2176 | retval = -ENOTTY; | |
2177 | } | |
1da177e4 LT |
2178 | } |
2179 | ||
2180 | /* cleanup and return */ | |
2181 | if (retval >= 0 | |
04e482ff | 2182 | && (_IOC_DIR(ctl->ioctl_code) & _IOC_READ) != 0 |
1da177e4 | 2183 | && size > 0 |
04e482ff | 2184 | && copy_to_user(ctl->data, buf, size) != 0) |
1da177e4 | 2185 | retval = -EFAULT; |
6fd19f4b JJ |
2186 | |
2187 | kfree(buf); | |
1da177e4 LT |
2188 | return retval; |
2189 | } | |
2190 | ||
9b6f0c4b | 2191 | static int proc_ioctl_default(struct usb_dev_state *ps, void __user *arg) |
c36fc889 PZ |
2192 | { |
2193 | struct usbdevfs_ioctl ctrl; | |
2194 | ||
04e482ff | 2195 | if (copy_from_user(&ctrl, arg, sizeof(ctrl))) |
c36fc889 PZ |
2196 | return -EFAULT; |
2197 | return proc_ioctl(ps, &ctrl); | |
2198 | } | |
2199 | ||
2200 | #ifdef CONFIG_COMPAT | |
9b6f0c4b | 2201 | static int proc_ioctl_compat(struct usb_dev_state *ps, compat_uptr_t arg) |
c36fc889 PZ |
2202 | { |
2203 | struct usbdevfs_ioctl32 __user *uioc; | |
2204 | struct usbdevfs_ioctl ctrl; | |
2205 | u32 udata; | |
2206 | ||
058120d7 | 2207 | uioc = compat_ptr((long)arg); |
18753ebc MB |
2208 | if (!access_ok(VERIFY_READ, uioc, sizeof(*uioc)) || |
2209 | __get_user(ctrl.ifno, &uioc->ifno) || | |
2210 | __get_user(ctrl.ioctl_code, &uioc->ioctl_code) || | |
c36fc889 PZ |
2211 | __get_user(udata, &uioc->data)) |
2212 | return -EFAULT; | |
2213 | ctrl.data = compat_ptr(udata); | |
2214 | ||
2215 | return proc_ioctl(ps, &ctrl); | |
2216 | } | |
2217 | #endif | |
2218 | ||
9b6f0c4b | 2219 | static int proc_claim_port(struct usb_dev_state *ps, void __user *arg) |
7cbe5dca AS |
2220 | { |
2221 | unsigned portnum; | |
2222 | int rc; | |
2223 | ||
2224 | if (get_user(portnum, (unsigned __user *) arg)) | |
2225 | return -EFAULT; | |
2226 | rc = usb_hub_claim_port(ps->dev, portnum, ps); | |
2227 | if (rc == 0) | |
2228 | snoop(&ps->dev->dev, "port %d claimed by process %d: %s\n", | |
2229 | portnum, task_pid_nr(current), current->comm); | |
2230 | return rc; | |
2231 | } | |
2232 | ||
9b6f0c4b | 2233 | static int proc_release_port(struct usb_dev_state *ps, void __user *arg) |
7cbe5dca AS |
2234 | { |
2235 | unsigned portnum; | |
2236 | ||
2237 | if (get_user(portnum, (unsigned __user *) arg)) | |
2238 | return -EFAULT; | |
2239 | return usb_hub_release_port(ps->dev, portnum, ps); | |
2240 | } | |
2241 | ||
9b6f0c4b | 2242 | static int proc_get_capabilities(struct usb_dev_state *ps, void __user *arg) |
19181bc5 HG |
2243 | { |
2244 | __u32 caps; | |
2245 | ||
3f2cee73 | 2246 | caps = USBDEVFS_CAP_ZERO_PACKET | USBDEVFS_CAP_NO_PACKET_SIZE_LIM | |
d883f52e RG |
2247 | USBDEVFS_CAP_REAP_AFTER_DISCONNECT | USBDEVFS_CAP_MMAP | |
2248 | USBDEVFS_CAP_DROP_PRIVILEGES; | |
19181bc5 HG |
2249 | if (!ps->dev->bus->no_stop_on_short) |
2250 | caps |= USBDEVFS_CAP_BULK_CONTINUATION; | |
3d97ff63 HG |
2251 | if (ps->dev->bus->sg_tablesize) |
2252 | caps |= USBDEVFS_CAP_BULK_SCATTER_GATHER; | |
19181bc5 HG |
2253 | |
2254 | if (put_user(caps, (__u32 __user *)arg)) | |
2255 | return -EFAULT; | |
2256 | ||
2257 | return 0; | |
2258 | } | |
2259 | ||
9b6f0c4b | 2260 | static int proc_disconnect_claim(struct usb_dev_state *ps, void __user *arg) |
0837e7e5 HG |
2261 | { |
2262 | struct usbdevfs_disconnect_claim dc; | |
2263 | struct usb_interface *intf; | |
2264 | ||
2265 | if (copy_from_user(&dc, arg, sizeof(dc))) | |
2266 | return -EFAULT; | |
2267 | ||
2268 | intf = usb_ifnum_to_if(ps->dev, dc.interface); | |
2269 | if (!intf) | |
2270 | return -EINVAL; | |
2271 | ||
2272 | if (intf->dev.driver) { | |
2273 | struct usb_driver *driver = to_usb_driver(intf->dev.driver); | |
2274 | ||
d883f52e RG |
2275 | if (ps->privileges_dropped) |
2276 | return -EACCES; | |
2277 | ||
0837e7e5 HG |
2278 | if ((dc.flags & USBDEVFS_DISCONNECT_CLAIM_IF_DRIVER) && |
2279 | strncmp(dc.driver, intf->dev.driver->name, | |
2280 | sizeof(dc.driver)) != 0) | |
2281 | return -EBUSY; | |
2282 | ||
2283 | if ((dc.flags & USBDEVFS_DISCONNECT_CLAIM_EXCEPT_DRIVER) && | |
2284 | strncmp(dc.driver, intf->dev.driver->name, | |
2285 | sizeof(dc.driver)) == 0) | |
2286 | return -EBUSY; | |
2287 | ||
2288 | dev_dbg(&intf->dev, "disconnect by usbfs\n"); | |
2289 | usb_driver_release_interface(driver, intf); | |
2290 | } | |
2291 | ||
2292 | return claimintf(ps, dc.interface); | |
2293 | } | |
2294 | ||
3e75c6de | 2295 | static int proc_alloc_streams(struct usb_dev_state *ps, void __user *arg) |
bcf7f6e3 HG |
2296 | { |
2297 | unsigned num_streams, num_eps; | |
2298 | struct usb_host_endpoint **eps; | |
2299 | struct usb_interface *intf; | |
2300 | int r; | |
2301 | ||
2302 | r = parse_usbdevfs_streams(ps, arg, &num_streams, &num_eps, | |
2303 | &eps, &intf); | |
2304 | if (r) | |
2305 | return r; | |
2306 | ||
2307 | destroy_async_on_interface(ps, | |
2308 | intf->altsetting[0].desc.bInterfaceNumber); | |
2309 | ||
2310 | r = usb_alloc_streams(intf, eps, num_eps, num_streams, GFP_KERNEL); | |
2311 | kfree(eps); | |
2312 | return r; | |
2313 | } | |
2314 | ||
3e75c6de | 2315 | static int proc_free_streams(struct usb_dev_state *ps, void __user *arg) |
bcf7f6e3 HG |
2316 | { |
2317 | unsigned num_eps; | |
2318 | struct usb_host_endpoint **eps; | |
2319 | struct usb_interface *intf; | |
2320 | int r; | |
2321 | ||
2322 | r = parse_usbdevfs_streams(ps, arg, NULL, &num_eps, &eps, &intf); | |
2323 | if (r) | |
2324 | return r; | |
2325 | ||
2326 | destroy_async_on_interface(ps, | |
2327 | intf->altsetting[0].desc.bInterfaceNumber); | |
2328 | ||
2329 | r = usb_free_streams(intf, eps, num_eps, GFP_KERNEL); | |
2330 | kfree(eps); | |
2331 | return r; | |
2332 | } | |
2333 | ||
d883f52e RG |
2334 | static int proc_drop_privileges(struct usb_dev_state *ps, void __user *arg) |
2335 | { | |
2336 | u32 data; | |
2337 | ||
2338 | if (copy_from_user(&data, arg, sizeof(data))) | |
2339 | return -EFAULT; | |
2340 | ||
2341 | /* This is an one way operation. Once privileges are | |
2342 | * dropped, you cannot regain them. You may however reissue | |
2343 | * this ioctl to shrink the allowed interfaces mask. | |
2344 | */ | |
2345 | ps->interface_allowed_mask &= data; | |
2346 | ps->privileges_dropped = true; | |
2347 | ||
2348 | return 0; | |
2349 | } | |
2350 | ||
1da177e4 LT |
2351 | /* |
2352 | * NOTE: All requests here that have interface numbers as parameters | |
2353 | * are assuming that somehow the configuration has been prevented from | |
2354 | * changing. But there's no mechanism to ensure that... | |
2355 | */ | |
637e8a60 AB |
2356 | static long usbdev_do_ioctl(struct file *file, unsigned int cmd, |
2357 | void __user *p) | |
1da177e4 | 2358 | { |
9b6f0c4b | 2359 | struct usb_dev_state *ps = file->private_data; |
496ad9aa | 2360 | struct inode *inode = file_inode(file); |
1da177e4 | 2361 | struct usb_device *dev = ps->dev; |
1da177e4 LT |
2362 | int ret = -ENOTTY; |
2363 | ||
2364 | if (!(file->f_mode & FMODE_WRITE)) | |
2365 | return -EPERM; | |
01412a21 | 2366 | |
1da177e4 | 2367 | usb_lock_device(dev); |
3f2cee73 AS |
2368 | |
2369 | /* Reap operations are allowed even after disconnection */ | |
2370 | switch (cmd) { | |
2371 | case USBDEVFS_REAPURB: | |
2372 | snoop(&dev->dev, "%s: REAPURB\n", __func__); | |
2373 | ret = proc_reapurb(ps, p); | |
2374 | goto done; | |
2375 | ||
2376 | case USBDEVFS_REAPURBNDELAY: | |
2377 | snoop(&dev->dev, "%s: REAPURBNDELAY\n", __func__); | |
2378 | ret = proc_reapurbnonblock(ps, p); | |
2379 | goto done; | |
2380 | ||
2381 | #ifdef CONFIG_COMPAT | |
2382 | case USBDEVFS_REAPURB32: | |
2383 | snoop(&dev->dev, "%s: REAPURB32\n", __func__); | |
2384 | ret = proc_reapurb_compat(ps, p); | |
2385 | goto done; | |
2386 | ||
2387 | case USBDEVFS_REAPURBNDELAY32: | |
2388 | snoop(&dev->dev, "%s: REAPURBNDELAY32\n", __func__); | |
2389 | ret = proc_reapurbnonblock_compat(ps, p); | |
2390 | goto done; | |
2391 | #endif | |
2392 | } | |
2393 | ||
349710c3 | 2394 | if (!connected(ps)) { |
1da177e4 LT |
2395 | usb_unlock_device(dev); |
2396 | return -ENODEV; | |
2397 | } | |
2398 | ||
2399 | switch (cmd) { | |
2400 | case USBDEVFS_CONTROL: | |
441b62c1 | 2401 | snoop(&dev->dev, "%s: CONTROL\n", __func__); |
1da177e4 LT |
2402 | ret = proc_control(ps, p); |
2403 | if (ret >= 0) | |
2404 | inode->i_mtime = CURRENT_TIME; | |
2405 | break; | |
2406 | ||
2407 | case USBDEVFS_BULK: | |
441b62c1 | 2408 | snoop(&dev->dev, "%s: BULK\n", __func__); |
1da177e4 LT |
2409 | ret = proc_bulk(ps, p); |
2410 | if (ret >= 0) | |
2411 | inode->i_mtime = CURRENT_TIME; | |
2412 | break; | |
2413 | ||
2414 | case USBDEVFS_RESETEP: | |
441b62c1 | 2415 | snoop(&dev->dev, "%s: RESETEP\n", __func__); |
1da177e4 LT |
2416 | ret = proc_resetep(ps, p); |
2417 | if (ret >= 0) | |
2418 | inode->i_mtime = CURRENT_TIME; | |
2419 | break; | |
2420 | ||
2421 | case USBDEVFS_RESET: | |
441b62c1 | 2422 | snoop(&dev->dev, "%s: RESET\n", __func__); |
1da177e4 LT |
2423 | ret = proc_resetdevice(ps); |
2424 | break; | |
2425 | ||
2426 | case USBDEVFS_CLEAR_HALT: | |
441b62c1 | 2427 | snoop(&dev->dev, "%s: CLEAR_HALT\n", __func__); |
1da177e4 LT |
2428 | ret = proc_clearhalt(ps, p); |
2429 | if (ret >= 0) | |
2430 | inode->i_mtime = CURRENT_TIME; | |
2431 | break; | |
2432 | ||
2433 | case USBDEVFS_GETDRIVER: | |
441b62c1 | 2434 | snoop(&dev->dev, "%s: GETDRIVER\n", __func__); |
1da177e4 LT |
2435 | ret = proc_getdriver(ps, p); |
2436 | break; | |
2437 | ||
2438 | case USBDEVFS_CONNECTINFO: | |
441b62c1 | 2439 | snoop(&dev->dev, "%s: CONNECTINFO\n", __func__); |
1da177e4 LT |
2440 | ret = proc_connectinfo(ps, p); |
2441 | break; | |
2442 | ||
2443 | case USBDEVFS_SETINTERFACE: | |
441b62c1 | 2444 | snoop(&dev->dev, "%s: SETINTERFACE\n", __func__); |
1da177e4 LT |
2445 | ret = proc_setintf(ps, p); |
2446 | break; | |
2447 | ||
2448 | case USBDEVFS_SETCONFIGURATION: | |
441b62c1 | 2449 | snoop(&dev->dev, "%s: SETCONFIGURATION\n", __func__); |
1da177e4 LT |
2450 | ret = proc_setconfig(ps, p); |
2451 | break; | |
2452 | ||
2453 | case USBDEVFS_SUBMITURB: | |
441b62c1 | 2454 | snoop(&dev->dev, "%s: SUBMITURB\n", __func__); |
1da177e4 LT |
2455 | ret = proc_submiturb(ps, p); |
2456 | if (ret >= 0) | |
2457 | inode->i_mtime = CURRENT_TIME; | |
2458 | break; | |
2459 | ||
2460 | #ifdef CONFIG_COMPAT | |
637e8a60 AB |
2461 | case USBDEVFS_CONTROL32: |
2462 | snoop(&dev->dev, "%s: CONTROL32\n", __func__); | |
2463 | ret = proc_control_compat(ps, p); | |
2464 | if (ret >= 0) | |
2465 | inode->i_mtime = CURRENT_TIME; | |
2466 | break; | |
2467 | ||
2468 | case USBDEVFS_BULK32: | |
2469 | snoop(&dev->dev, "%s: BULK32\n", __func__); | |
2470 | ret = proc_bulk_compat(ps, p); | |
2471 | if (ret >= 0) | |
2472 | inode->i_mtime = CURRENT_TIME; | |
2473 | break; | |
2474 | ||
2475 | case USBDEVFS_DISCSIGNAL32: | |
2476 | snoop(&dev->dev, "%s: DISCSIGNAL32\n", __func__); | |
2477 | ret = proc_disconnectsignal_compat(ps, p); | |
2478 | break; | |
1da177e4 LT |
2479 | |
2480 | case USBDEVFS_SUBMITURB32: | |
441b62c1 | 2481 | snoop(&dev->dev, "%s: SUBMITURB32\n", __func__); |
1da177e4 LT |
2482 | ret = proc_submiturb_compat(ps, p); |
2483 | if (ret >= 0) | |
2484 | inode->i_mtime = CURRENT_TIME; | |
2485 | break; | |
2486 | ||
c36fc889 | 2487 | case USBDEVFS_IOCTL32: |
637e8a60 | 2488 | snoop(&dev->dev, "%s: IOCTL32\n", __func__); |
c714de5d | 2489 | ret = proc_ioctl_compat(ps, ptr_to_compat(p)); |
c36fc889 | 2490 | break; |
1da177e4 LT |
2491 | #endif |
2492 | ||
2493 | case USBDEVFS_DISCARDURB: | |
a016a816 | 2494 | snoop(&dev->dev, "%s: DISCARDURB %p\n", __func__, p); |
1da177e4 LT |
2495 | ret = proc_unlinkurb(ps, p); |
2496 | break; | |
2497 | ||
1da177e4 | 2498 | case USBDEVFS_DISCSIGNAL: |
441b62c1 | 2499 | snoop(&dev->dev, "%s: DISCSIGNAL\n", __func__); |
1da177e4 LT |
2500 | ret = proc_disconnectsignal(ps, p); |
2501 | break; | |
2502 | ||
2503 | case USBDEVFS_CLAIMINTERFACE: | |
441b62c1 | 2504 | snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __func__); |
1da177e4 LT |
2505 | ret = proc_claiminterface(ps, p); |
2506 | break; | |
2507 | ||
2508 | case USBDEVFS_RELEASEINTERFACE: | |
441b62c1 | 2509 | snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __func__); |
1da177e4 LT |
2510 | ret = proc_releaseinterface(ps, p); |
2511 | break; | |
2512 | ||
2513 | case USBDEVFS_IOCTL: | |
441b62c1 | 2514 | snoop(&dev->dev, "%s: IOCTL\n", __func__); |
c36fc889 | 2515 | ret = proc_ioctl_default(ps, p); |
1da177e4 | 2516 | break; |
7cbe5dca AS |
2517 | |
2518 | case USBDEVFS_CLAIM_PORT: | |
2519 | snoop(&dev->dev, "%s: CLAIM_PORT\n", __func__); | |
2520 | ret = proc_claim_port(ps, p); | |
2521 | break; | |
2522 | ||
2523 | case USBDEVFS_RELEASE_PORT: | |
2524 | snoop(&dev->dev, "%s: RELEASE_PORT\n", __func__); | |
2525 | ret = proc_release_port(ps, p); | |
2526 | break; | |
19181bc5 HG |
2527 | case USBDEVFS_GET_CAPABILITIES: |
2528 | ret = proc_get_capabilities(ps, p); | |
2529 | break; | |
0837e7e5 HG |
2530 | case USBDEVFS_DISCONNECT_CLAIM: |
2531 | ret = proc_disconnect_claim(ps, p); | |
2532 | break; | |
bcf7f6e3 HG |
2533 | case USBDEVFS_ALLOC_STREAMS: |
2534 | ret = proc_alloc_streams(ps, p); | |
2535 | break; | |
2536 | case USBDEVFS_FREE_STREAMS: | |
2537 | ret = proc_free_streams(ps, p); | |
2538 | break; | |
d883f52e RG |
2539 | case USBDEVFS_DROP_PRIVILEGES: |
2540 | ret = proc_drop_privileges(ps, p); | |
2541 | break; | |
1da177e4 | 2542 | } |
3f2cee73 AS |
2543 | |
2544 | done: | |
1da177e4 LT |
2545 | usb_unlock_device(dev); |
2546 | if (ret >= 0) | |
2547 | inode->i_atime = CURRENT_TIME; | |
2548 | return ret; | |
2549 | } | |
2550 | ||
637e8a60 AB |
2551 | static long usbdev_ioctl(struct file *file, unsigned int cmd, |
2552 | unsigned long arg) | |
2553 | { | |
2554 | int ret; | |
2555 | ||
637e8a60 | 2556 | ret = usbdev_do_ioctl(file, cmd, (void __user *)arg); |
637e8a60 AB |
2557 | |
2558 | return ret; | |
2559 | } | |
2560 | ||
2561 | #ifdef CONFIG_COMPAT | |
2562 | static long usbdev_compat_ioctl(struct file *file, unsigned int cmd, | |
2563 | unsigned long arg) | |
2564 | { | |
2565 | int ret; | |
2566 | ||
637e8a60 | 2567 | ret = usbdev_do_ioctl(file, cmd, compat_ptr(arg)); |
637e8a60 AB |
2568 | |
2569 | return ret; | |
2570 | } | |
2571 | #endif | |
2572 | ||
1da177e4 | 2573 | /* No kernel lock - fine */ |
04e482ff GKH |
2574 | static unsigned int usbdev_poll(struct file *file, |
2575 | struct poll_table_struct *wait) | |
1da177e4 | 2576 | { |
9b6f0c4b | 2577 | struct usb_dev_state *ps = file->private_data; |
ec17cf1c | 2578 | unsigned int mask = 0; |
1da177e4 LT |
2579 | |
2580 | poll_wait(file, &ps->wait, wait); | |
2581 | if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed)) | |
2582 | mask |= POLLOUT | POLLWRNORM; | |
349710c3 | 2583 | if (!connected(ps)) |
1da177e4 LT |
2584 | mask |= POLLERR | POLLHUP; |
2585 | return mask; | |
2586 | } | |
2587 | ||
9f8b17e6 | 2588 | const struct file_operations usbdev_file_operations = { |
637e8a60 | 2589 | .owner = THIS_MODULE, |
b25472f9 | 2590 | .llseek = no_seek_end_llseek, |
637e8a60 AB |
2591 | .read = usbdev_read, |
2592 | .poll = usbdev_poll, | |
2593 | .unlocked_ioctl = usbdev_ioctl, | |
2594 | #ifdef CONFIG_COMPAT | |
2595 | .compat_ioctl = usbdev_compat_ioctl, | |
2596 | #endif | |
f7d34b44 | 2597 | .mmap = usbdev_mmap, |
637e8a60 AB |
2598 | .open = usbdev_open, |
2599 | .release = usbdev_release, | |
1da177e4 | 2600 | }; |
fbf82fd2 | 2601 | |
501950d8 | 2602 | static void usbdev_remove(struct usb_device *udev) |
cd9f0375 | 2603 | { |
9b6f0c4b | 2604 | struct usb_dev_state *ps; |
cd9f0375 AS |
2605 | struct siginfo sinfo; |
2606 | ||
2607 | while (!list_empty(&udev->filelist)) { | |
9b6f0c4b | 2608 | ps = list_entry(udev->filelist.next, struct usb_dev_state, list); |
cd9f0375 AS |
2609 | destroy_all_async(ps); |
2610 | wake_up_all(&ps->wait); | |
2611 | list_del_init(&ps->list); | |
2612 | if (ps->discsignr) { | |
f0c2b681 | 2613 | memset(&sinfo, 0, sizeof(sinfo)); |
cd9f0375 AS |
2614 | sinfo.si_signo = ps->discsignr; |
2615 | sinfo.si_errno = EPIPE; | |
2616 | sinfo.si_code = SI_ASYNCIO; | |
2617 | sinfo.si_addr = ps->disccontext; | |
d178bc3a SH |
2618 | kill_pid_info_as_cred(ps->discsignr, &sinfo, |
2619 | ps->disc_pid, ps->cred, ps->secid); | |
cd9f0375 AS |
2620 | } |
2621 | } | |
2622 | } | |
2623 | ||
501950d8 | 2624 | static int usbdev_notify(struct notifier_block *self, |
9f8b17e6 | 2625 | unsigned long action, void *dev) |
a7b986b3 GKH |
2626 | { |
2627 | switch (action) { | |
2628 | case USB_DEVICE_ADD: | |
a7b986b3 GKH |
2629 | break; |
2630 | case USB_DEVICE_REMOVE: | |
501950d8 | 2631 | usbdev_remove(dev); |
a7b986b3 GKH |
2632 | break; |
2633 | } | |
2634 | return NOTIFY_OK; | |
2635 | } | |
2636 | ||
2637 | static struct notifier_block usbdev_nb = { | |
00fe52de | 2638 | .notifier_call = usbdev_notify, |
a7b986b3 GKH |
2639 | }; |
2640 | ||
7e7654a9 | 2641 | static struct cdev usb_device_cdev; |
fbf82fd2 | 2642 | |
9f8b17e6 | 2643 | int __init usb_devio_init(void) |
fbf82fd2 KS |
2644 | { |
2645 | int retval; | |
2646 | ||
fad21bdf | 2647 | retval = register_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX, |
04e482ff | 2648 | "usb_device"); |
fbf82fd2 | 2649 | if (retval) { |
69a85942 | 2650 | printk(KERN_ERR "Unable to register minors for usb_device\n"); |
fbf82fd2 KS |
2651 | goto out; |
2652 | } | |
9f8b17e6 | 2653 | cdev_init(&usb_device_cdev, &usbdev_file_operations); |
fad21bdf | 2654 | retval = cdev_add(&usb_device_cdev, USB_DEVICE_DEV, USB_DEVICE_MAX); |
fbf82fd2 | 2655 | if (retval) { |
69a85942 GKH |
2656 | printk(KERN_ERR "Unable to get usb_device major %d\n", |
2657 | USB_DEVICE_MAJOR); | |
a7b986b3 | 2658 | goto error_cdev; |
fbf82fd2 | 2659 | } |
501950d8 | 2660 | usb_register_notify(&usbdev_nb); |
fbf82fd2 KS |
2661 | out: |
2662 | return retval; | |
a7b986b3 | 2663 | |
a7b986b3 GKH |
2664 | error_cdev: |
2665 | unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX); | |
2666 | goto out; | |
fbf82fd2 KS |
2667 | } |
2668 | ||
9f8b17e6 | 2669 | void usb_devio_cleanup(void) |
fbf82fd2 | 2670 | { |
a7b986b3 | 2671 | usb_unregister_notify(&usbdev_nb); |
fbf82fd2 | 2672 | cdev_del(&usb_device_cdev); |
fad21bdf | 2673 | unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX); |
fbf82fd2 | 2674 | } |