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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> | |
3f07c014 | 39 | #include <linux/sched/signal.h> |
1da177e4 | 40 | #include <linux/slab.h> |
1da177e4 LT |
41 | #include <linux/signal.h> |
42 | #include <linux/poll.h> | |
43 | #include <linux/module.h> | |
b11b2e1b | 44 | #include <linux/string.h> |
1da177e4 LT |
45 | #include <linux/usb.h> |
46 | #include <linux/usbdevice_fs.h> | |
27729aad | 47 | #include <linux/usb/hcd.h> /* for usbcore internals */ |
fbf82fd2 | 48 | #include <linux/cdev.h> |
a7b986b3 | 49 | #include <linux/notifier.h> |
7a01955f | 50 | #include <linux/security.h> |
d178bc3a | 51 | #include <linux/user_namespace.h> |
3d97ff63 | 52 | #include <linux/scatterlist.h> |
e6889b31 | 53 | #include <linux/uaccess.h> |
f7d34b44 | 54 | #include <linux/dma-mapping.h> |
1da177e4 LT |
55 | #include <asm/byteorder.h> |
56 | #include <linux/moduleparam.h> | |
57 | ||
1da177e4 LT |
58 | #include "usb.h" |
59 | ||
fbf82fd2 | 60 | #define USB_MAXBUS 64 |
fa86ad0b | 61 | #define USB_DEVICE_MAX (USB_MAXBUS * 128) |
3d97ff63 | 62 | #define USB_SG_SIZE 16384 /* split-size for large txs */ |
fbf82fd2 | 63 | |
4a2a8a2c AS |
64 | /* Mutual exclusion for removal, open, and release */ |
65 | DEFINE_MUTEX(usbfs_mutex); | |
66 | ||
9b6f0c4b | 67 | struct usb_dev_state { |
cd9f0375 AS |
68 | struct list_head list; /* state list */ |
69 | struct usb_device *dev; | |
70 | struct file *file; | |
71 | spinlock_t lock; /* protects the async urb lists */ | |
72 | struct list_head async_pending; | |
73 | struct list_head async_completed; | |
f7d34b44 | 74 | struct list_head memory_list; |
cd9f0375 AS |
75 | wait_queue_head_t wait; /* wake up if a request completed */ |
76 | unsigned int discsignr; | |
77 | struct pid *disc_pid; | |
d178bc3a | 78 | const struct cred *cred; |
cd9f0375 AS |
79 | void __user *disccontext; |
80 | unsigned long ifclaimed; | |
81 | u32 secid; | |
01c6460f | 82 | u32 disabled_bulk_eps; |
d883f52e RG |
83 | bool privileges_dropped; |
84 | unsigned long interface_allowed_mask; | |
cd9f0375 AS |
85 | }; |
86 | ||
f7d34b44 SG |
87 | struct usb_memory { |
88 | struct list_head memlist; | |
89 | int vma_use_count; | |
90 | int urb_use_count; | |
91 | u32 size; | |
92 | void *mem; | |
93 | dma_addr_t dma_handle; | |
94 | unsigned long vm_start; | |
95 | struct usb_dev_state *ps; | |
96 | }; | |
97 | ||
1da177e4 LT |
98 | struct async { |
99 | struct list_head asynclist; | |
9b6f0c4b | 100 | struct usb_dev_state *ps; |
2425c08b | 101 | struct pid *pid; |
d178bc3a | 102 | const struct cred *cred; |
1da177e4 LT |
103 | unsigned int signr; |
104 | unsigned int ifnum; | |
105 | void __user *userbuffer; | |
106 | void __user *userurb; | |
107 | struct urb *urb; | |
f7d34b44 | 108 | struct usb_memory *usbm; |
add1aaea | 109 | unsigned int mem_usage; |
e015268d | 110 | int status; |
7a01955f | 111 | u32 secid; |
01c6460f AS |
112 | u8 bulk_addr; |
113 | u8 bulk_status; | |
1da177e4 LT |
114 | }; |
115 | ||
90ab5ee9 | 116 | static bool usbfs_snoop; |
04e482ff GKH |
117 | module_param(usbfs_snoop, bool, S_IRUGO | S_IWUSR); |
118 | MODULE_PARM_DESC(usbfs_snoop, "true to log all usbfs traffic"); | |
1da177e4 | 119 | |
0290cc9f AS |
120 | static unsigned usbfs_snoop_max = 65536; |
121 | module_param(usbfs_snoop_max, uint, S_IRUGO | S_IWUSR); | |
122 | MODULE_PARM_DESC(usbfs_snoop_max, | |
123 | "maximum number of bytes to print while snooping"); | |
124 | ||
1da177e4 LT |
125 | #define snoop(dev, format, arg...) \ |
126 | do { \ | |
127 | if (usbfs_snoop) \ | |
f355e830 | 128 | dev_info(dev, format, ## arg); \ |
1da177e4 LT |
129 | } while (0) |
130 | ||
4c6e8971 AS |
131 | enum snoop_when { |
132 | SUBMIT, COMPLETE | |
133 | }; | |
fad21bdf | 134 | |
4c6e8971 | 135 | #define USB_DEVICE_DEV MKDEV(USB_DEVICE_MAJOR, 0) |
1da177e4 | 136 | |
add1aaea | 137 | /* Limit on the total amount of memory we can allocate for transfers */ |
1129d270 | 138 | static u32 usbfs_memory_mb = 16; |
3f5eb8d5 AS |
139 | module_param(usbfs_memory_mb, uint, 0644); |
140 | MODULE_PARM_DESC(usbfs_memory_mb, | |
141 | "maximum MB allowed for usbfs buffers (0 = no limit)"); | |
142 | ||
1129d270 | 143 | static atomic64_t usbfs_memory_usage; /* Total memory currently allocated */ |
add1aaea AS |
144 | |
145 | /* Check whether it's okay to allocate more memory for a transfer */ | |
1129d270 | 146 | static int usbfs_increase_memory_usage(u64 amount) |
add1aaea | 147 | { |
1129d270 | 148 | u64 lim; |
3f5eb8d5 | 149 | |
3f5eb8d5 | 150 | lim = ACCESS_ONCE(usbfs_memory_mb); |
1129d270 | 151 | lim <<= 20; |
3f5eb8d5 | 152 | |
1129d270 MB |
153 | atomic64_add(amount, &usbfs_memory_usage); |
154 | ||
155 | if (lim > 0 && atomic64_read(&usbfs_memory_usage) > lim) { | |
156 | atomic64_sub(amount, &usbfs_memory_usage); | |
157 | return -ENOMEM; | |
158 | } | |
159 | ||
160 | return 0; | |
add1aaea AS |
161 | } |
162 | ||
163 | /* Memory for a transfer is being deallocated */ | |
1129d270 | 164 | static void usbfs_decrease_memory_usage(u64 amount) |
add1aaea | 165 | { |
1129d270 | 166 | atomic64_sub(amount, &usbfs_memory_usage); |
add1aaea | 167 | } |
4c6e8971 | 168 | |
9b6f0c4b | 169 | static int connected(struct usb_dev_state *ps) |
1da177e4 | 170 | { |
349710c3 AS |
171 | return (!list_empty(&ps->list) && |
172 | ps->dev->state != USB_STATE_NOTATTACHED); | |
1da177e4 LT |
173 | } |
174 | ||
f7d34b44 SG |
175 | static void dec_usb_memory_use_count(struct usb_memory *usbm, int *count) |
176 | { | |
177 | struct usb_dev_state *ps = usbm->ps; | |
178 | unsigned long flags; | |
179 | ||
180 | spin_lock_irqsave(&ps->lock, flags); | |
181 | --*count; | |
182 | if (usbm->urb_use_count == 0 && usbm->vma_use_count == 0) { | |
183 | list_del(&usbm->memlist); | |
184 | spin_unlock_irqrestore(&ps->lock, flags); | |
185 | ||
186 | usb_free_coherent(ps->dev, usbm->size, usbm->mem, | |
187 | usbm->dma_handle); | |
188 | usbfs_decrease_memory_usage( | |
189 | usbm->size + sizeof(struct usb_memory)); | |
190 | kfree(usbm); | |
191 | } else { | |
192 | spin_unlock_irqrestore(&ps->lock, flags); | |
193 | } | |
194 | } | |
195 | ||
196 | static void usbdev_vm_open(struct vm_area_struct *vma) | |
197 | { | |
198 | struct usb_memory *usbm = vma->vm_private_data; | |
199 | unsigned long flags; | |
200 | ||
201 | spin_lock_irqsave(&usbm->ps->lock, flags); | |
202 | ++usbm->vma_use_count; | |
203 | spin_unlock_irqrestore(&usbm->ps->lock, flags); | |
204 | } | |
205 | ||
206 | static void usbdev_vm_close(struct vm_area_struct *vma) | |
207 | { | |
208 | struct usb_memory *usbm = vma->vm_private_data; | |
209 | ||
210 | dec_usb_memory_use_count(usbm, &usbm->vma_use_count); | |
211 | } | |
212 | ||
10871c13 | 213 | static struct vm_operations_struct usbdev_vm_ops = { |
f7d34b44 SG |
214 | .open = usbdev_vm_open, |
215 | .close = usbdev_vm_close | |
216 | }; | |
217 | ||
218 | static int usbdev_mmap(struct file *file, struct vm_area_struct *vma) | |
219 | { | |
220 | struct usb_memory *usbm = NULL; | |
221 | struct usb_dev_state *ps = file->private_data; | |
222 | size_t size = vma->vm_end - vma->vm_start; | |
223 | void *mem; | |
224 | unsigned long flags; | |
225 | dma_addr_t dma_handle; | |
226 | int ret; | |
227 | ||
228 | ret = usbfs_increase_memory_usage(size + sizeof(struct usb_memory)); | |
229 | if (ret) | |
230 | goto error; | |
231 | ||
232 | usbm = kzalloc(sizeof(struct usb_memory), GFP_KERNEL); | |
233 | if (!usbm) { | |
234 | ret = -ENOMEM; | |
235 | goto error_decrease_mem; | |
236 | } | |
237 | ||
70f7ca9a JS |
238 | mem = usb_alloc_coherent(ps->dev, size, GFP_USER | __GFP_NOWARN, |
239 | &dma_handle); | |
f7d34b44 SG |
240 | if (!mem) { |
241 | ret = -ENOMEM; | |
242 | goto error_free_usbm; | |
243 | } | |
244 | ||
245 | memset(mem, 0, size); | |
246 | ||
247 | usbm->mem = mem; | |
248 | usbm->dma_handle = dma_handle; | |
249 | usbm->size = size; | |
250 | usbm->ps = ps; | |
251 | usbm->vm_start = vma->vm_start; | |
252 | usbm->vma_use_count = 1; | |
253 | INIT_LIST_HEAD(&usbm->memlist); | |
254 | ||
255 | if (remap_pfn_range(vma, vma->vm_start, | |
256 | virt_to_phys(usbm->mem) >> PAGE_SHIFT, | |
257 | size, vma->vm_page_prot) < 0) { | |
258 | dec_usb_memory_use_count(usbm, &usbm->vma_use_count); | |
259 | return -EAGAIN; | |
260 | } | |
261 | ||
262 | vma->vm_flags |= VM_IO; | |
263 | vma->vm_flags |= (VM_DONTEXPAND | VM_DONTDUMP); | |
264 | vma->vm_ops = &usbdev_vm_ops; | |
265 | vma->vm_private_data = usbm; | |
266 | ||
267 | spin_lock_irqsave(&ps->lock, flags); | |
268 | list_add_tail(&usbm->memlist, &ps->memory_list); | |
269 | spin_unlock_irqrestore(&ps->lock, flags); | |
270 | ||
271 | return 0; | |
272 | ||
273 | error_free_usbm: | |
274 | kfree(usbm); | |
275 | error_decrease_mem: | |
276 | usbfs_decrease_memory_usage(size + sizeof(struct usb_memory)); | |
277 | error: | |
278 | return ret; | |
279 | } | |
280 | ||
04e482ff GKH |
281 | static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes, |
282 | loff_t *ppos) | |
1da177e4 | 283 | { |
9b6f0c4b | 284 | struct usb_dev_state *ps = file->private_data; |
1da177e4 LT |
285 | struct usb_device *dev = ps->dev; |
286 | ssize_t ret = 0; | |
287 | unsigned len; | |
288 | loff_t pos; | |
289 | int i; | |
290 | ||
291 | pos = *ppos; | |
292 | usb_lock_device(dev); | |
349710c3 | 293 | if (!connected(ps)) { |
1da177e4 LT |
294 | ret = -ENODEV; |
295 | goto err; | |
296 | } else if (pos < 0) { | |
297 | ret = -EINVAL; | |
298 | goto err; | |
299 | } | |
300 | ||
301 | if (pos < sizeof(struct usb_device_descriptor)) { | |
04e482ff GKH |
302 | /* 18 bytes - fits on the stack */ |
303 | struct usb_device_descriptor temp_desc; | |
8781ba0a ON |
304 | |
305 | memcpy(&temp_desc, &dev->descriptor, sizeof(dev->descriptor)); | |
9fcd5c32 AM |
306 | le16_to_cpus(&temp_desc.bcdUSB); |
307 | le16_to_cpus(&temp_desc.idVendor); | |
308 | le16_to_cpus(&temp_desc.idProduct); | |
309 | le16_to_cpus(&temp_desc.bcdDevice); | |
1da177e4 LT |
310 | |
311 | len = sizeof(struct usb_device_descriptor) - pos; | |
312 | if (len > nbytes) | |
313 | len = nbytes; | |
8781ba0a | 314 | if (copy_to_user(buf, ((char *)&temp_desc) + pos, len)) { |
1da177e4 LT |
315 | ret = -EFAULT; |
316 | goto err; | |
317 | } | |
1da177e4 LT |
318 | |
319 | *ppos += len; | |
320 | buf += len; | |
321 | nbytes -= len; | |
322 | ret += len; | |
323 | } | |
324 | ||
325 | pos = sizeof(struct usb_device_descriptor); | |
326 | for (i = 0; nbytes && i < dev->descriptor.bNumConfigurations; i++) { | |
327 | struct usb_config_descriptor *config = | |
328 | (struct usb_config_descriptor *)dev->rawdescriptors[i]; | |
329 | unsigned int length = le16_to_cpu(config->wTotalLength); | |
330 | ||
331 | if (*ppos < pos + length) { | |
332 | ||
333 | /* The descriptor may claim to be longer than it | |
334 | * really is. Here is the actual allocated length. */ | |
335 | unsigned alloclen = | |
336 | le16_to_cpu(dev->config[i].desc.wTotalLength); | |
337 | ||
338 | len = length - (*ppos - pos); | |
339 | if (len > nbytes) | |
340 | len = nbytes; | |
341 | ||
342 | /* Simply don't write (skip over) unallocated parts */ | |
343 | if (alloclen > (*ppos - pos)) { | |
344 | alloclen -= (*ppos - pos); | |
345 | if (copy_to_user(buf, | |
346 | dev->rawdescriptors[i] + (*ppos - pos), | |
347 | min(len, alloclen))) { | |
348 | ret = -EFAULT; | |
349 | goto err; | |
350 | } | |
351 | } | |
352 | ||
353 | *ppos += len; | |
354 | buf += len; | |
355 | nbytes -= len; | |
356 | ret += len; | |
357 | } | |
358 | ||
359 | pos += length; | |
360 | } | |
361 | ||
362 | err: | |
363 | usb_unlock_device(dev); | |
364 | return ret; | |
365 | } | |
366 | ||
367 | /* | |
368 | * async list handling | |
369 | */ | |
370 | ||
371 | static struct async *alloc_async(unsigned int numisoframes) | |
372 | { | |
dd95b814 | 373 | struct async *as; |
0a1ef3b5 | 374 | |
dd95b814 | 375 | as = kzalloc(sizeof(struct async), GFP_KERNEL); |
04e482ff GKH |
376 | if (!as) |
377 | return NULL; | |
1da177e4 LT |
378 | as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL); |
379 | if (!as->urb) { | |
380 | kfree(as); | |
381 | return NULL; | |
382 | } | |
04e482ff | 383 | return as; |
1da177e4 LT |
384 | } |
385 | ||
386 | static void free_async(struct async *as) | |
387 | { | |
3d97ff63 HG |
388 | int i; |
389 | ||
2425c08b | 390 | put_pid(as->pid); |
1b41c832 SS |
391 | if (as->cred) |
392 | put_cred(as->cred); | |
3d97ff63 HG |
393 | for (i = 0; i < as->urb->num_sgs; i++) { |
394 | if (sg_page(&as->urb->sg[i])) | |
395 | kfree(sg_virt(&as->urb->sg[i])); | |
396 | } | |
f7d34b44 | 397 | |
3d97ff63 | 398 | kfree(as->urb->sg); |
f7d34b44 SG |
399 | if (as->usbm == NULL) |
400 | kfree(as->urb->transfer_buffer); | |
401 | else | |
402 | dec_usb_memory_use_count(as->usbm, &as->usbm->urb_use_count); | |
403 | ||
6fd19f4b | 404 | kfree(as->urb->setup_packet); |
1da177e4 | 405 | usb_free_urb(as->urb); |
add1aaea | 406 | usbfs_decrease_memory_usage(as->mem_usage); |
6fd19f4b | 407 | kfree(as); |
1da177e4 LT |
408 | } |
409 | ||
d34d9721 | 410 | static void async_newpending(struct async *as) |
1da177e4 | 411 | { |
9b6f0c4b | 412 | struct usb_dev_state *ps = as->ps; |
04e482ff GKH |
413 | unsigned long flags; |
414 | ||
415 | spin_lock_irqsave(&ps->lock, flags); | |
416 | list_add_tail(&as->asynclist, &ps->async_pending); | |
417 | spin_unlock_irqrestore(&ps->lock, flags); | |
1da177e4 LT |
418 | } |
419 | ||
d34d9721 | 420 | static void async_removepending(struct async *as) |
1da177e4 | 421 | { |
9b6f0c4b | 422 | struct usb_dev_state *ps = as->ps; |
04e482ff GKH |
423 | unsigned long flags; |
424 | ||
425 | spin_lock_irqsave(&ps->lock, flags); | |
426 | list_del_init(&as->asynclist); | |
427 | spin_unlock_irqrestore(&ps->lock, flags); | |
1da177e4 LT |
428 | } |
429 | ||
9b6f0c4b | 430 | static struct async *async_getcompleted(struct usb_dev_state *ps) |
1da177e4 | 431 | { |
04e482ff GKH |
432 | unsigned long flags; |
433 | struct async *as = NULL; | |
434 | ||
435 | spin_lock_irqsave(&ps->lock, flags); | |
436 | if (!list_empty(&ps->async_completed)) { | |
437 | as = list_entry(ps->async_completed.next, struct async, | |
438 | asynclist); | |
439 | list_del_init(&as->asynclist); | |
440 | } | |
441 | spin_unlock_irqrestore(&ps->lock, flags); | |
442 | return as; | |
1da177e4 LT |
443 | } |
444 | ||
9b6f0c4b | 445 | static struct async *async_getpending(struct usb_dev_state *ps, |
04e482ff | 446 | void __user *userurb) |
1da177e4 | 447 | { |
04e482ff | 448 | struct async *as; |
1da177e4 | 449 | |
1da177e4 LT |
450 | list_for_each_entry(as, &ps->async_pending, asynclist) |
451 | if (as->userurb == userurb) { | |
452 | list_del_init(&as->asynclist); | |
1da177e4 LT |
453 | return as; |
454 | } | |
4e09dcf2 | 455 | |
04e482ff | 456 | return NULL; |
1da177e4 LT |
457 | } |
458 | ||
4c6e8971 AS |
459 | static void snoop_urb(struct usb_device *udev, |
460 | void __user *userurb, int pipe, unsigned length, | |
0880aef4 CF |
461 | int timeout_or_status, enum snoop_when when, |
462 | unsigned char *data, unsigned data_len) | |
e639dd3f | 463 | { |
4c6e8971 AS |
464 | static const char *types[] = {"isoc", "int", "ctrl", "bulk"}; |
465 | static const char *dirs[] = {"out", "in"}; | |
466 | int ep; | |
467 | const char *t, *d; | |
e639dd3f GKH |
468 | |
469 | if (!usbfs_snoop) | |
470 | return; | |
471 | ||
4c6e8971 AS |
472 | ep = usb_pipeendpoint(pipe); |
473 | t = types[usb_pipetype(pipe)]; | |
474 | d = dirs[!!usb_pipein(pipe)]; | |
475 | ||
476 | if (userurb) { /* Async */ | |
477 | if (when == SUBMIT) | |
478 | dev_info(&udev->dev, "userurb %p, ep%d %s-%s, " | |
479 | "length %u\n", | |
480 | userurb, ep, t, d, length); | |
481 | else | |
482 | dev_info(&udev->dev, "userurb %p, ep%d %s-%s, " | |
483 | "actual_length %u status %d\n", | |
484 | userurb, ep, t, d, length, | |
485 | timeout_or_status); | |
486 | } else { | |
487 | if (when == SUBMIT) | |
488 | dev_info(&udev->dev, "ep%d %s-%s, length %u, " | |
489 | "timeout %d\n", | |
490 | ep, t, d, length, timeout_or_status); | |
491 | else | |
492 | dev_info(&udev->dev, "ep%d %s-%s, actual_length %u, " | |
493 | "status %d\n", | |
494 | ep, t, d, length, timeout_or_status); | |
495 | } | |
0880aef4 | 496 | |
0290cc9f | 497 | data_len = min(data_len, usbfs_snoop_max); |
0880aef4 CF |
498 | if (data && data_len > 0) { |
499 | print_hex_dump(KERN_DEBUG, "data: ", DUMP_PREFIX_NONE, 32, 1, | |
500 | data, data_len, 1); | |
501 | } | |
e639dd3f GKH |
502 | } |
503 | ||
3d97ff63 HG |
504 | static void snoop_urb_data(struct urb *urb, unsigned len) |
505 | { | |
506 | int i, size; | |
507 | ||
0290cc9f AS |
508 | len = min(len, usbfs_snoop_max); |
509 | if (!usbfs_snoop || len == 0) | |
3d97ff63 HG |
510 | return; |
511 | ||
512 | if (urb->num_sgs == 0) { | |
513 | print_hex_dump(KERN_DEBUG, "data: ", DUMP_PREFIX_NONE, 32, 1, | |
514 | urb->transfer_buffer, len, 1); | |
515 | return; | |
516 | } | |
517 | ||
518 | for (i = 0; i < urb->num_sgs && len; i++) { | |
519 | size = (len > USB_SG_SIZE) ? USB_SG_SIZE : len; | |
520 | print_hex_dump(KERN_DEBUG, "data: ", DUMP_PREFIX_NONE, 32, 1, | |
521 | sg_virt(&urb->sg[i]), size, 1); | |
522 | len -= size; | |
523 | } | |
524 | } | |
525 | ||
526 | static int copy_urb_data_to_user(u8 __user *userbuffer, struct urb *urb) | |
527 | { | |
528 | unsigned i, len, size; | |
529 | ||
530 | if (urb->number_of_packets > 0) /* Isochronous */ | |
531 | len = urb->transfer_buffer_length; | |
532 | else /* Non-Isoc */ | |
533 | len = urb->actual_length; | |
534 | ||
535 | if (urb->num_sgs == 0) { | |
536 | if (copy_to_user(userbuffer, urb->transfer_buffer, len)) | |
537 | return -EFAULT; | |
538 | return 0; | |
539 | } | |
540 | ||
541 | for (i = 0; i < urb->num_sgs && len; i++) { | |
542 | size = (len > USB_SG_SIZE) ? USB_SG_SIZE : len; | |
543 | if (copy_to_user(userbuffer, sg_virt(&urb->sg[i]), size)) | |
544 | return -EFAULT; | |
545 | userbuffer += size; | |
546 | len -= size; | |
547 | } | |
548 | ||
549 | return 0; | |
550 | } | |
551 | ||
01c6460f AS |
552 | #define AS_CONTINUATION 1 |
553 | #define AS_UNLINK 2 | |
554 | ||
9b6f0c4b | 555 | static void cancel_bulk_urbs(struct usb_dev_state *ps, unsigned bulk_addr) |
01c6460f AS |
556 | __releases(ps->lock) |
557 | __acquires(ps->lock) | |
558 | { | |
4e09dcf2 | 559 | struct urb *urb; |
01c6460f AS |
560 | struct async *as; |
561 | ||
562 | /* Mark all the pending URBs that match bulk_addr, up to but not | |
563 | * including the first one without AS_CONTINUATION. If such an | |
564 | * URB is encountered then a new transfer has already started so | |
565 | * the endpoint doesn't need to be disabled; otherwise it does. | |
566 | */ | |
567 | list_for_each_entry(as, &ps->async_pending, asynclist) { | |
568 | if (as->bulk_addr == bulk_addr) { | |
569 | if (as->bulk_status != AS_CONTINUATION) | |
570 | goto rescan; | |
571 | as->bulk_status = AS_UNLINK; | |
572 | as->bulk_addr = 0; | |
573 | } | |
574 | } | |
575 | ps->disabled_bulk_eps |= (1 << bulk_addr); | |
576 | ||
577 | /* Now carefully unlink all the marked pending URBs */ | |
578 | rescan: | |
579 | list_for_each_entry(as, &ps->async_pending, asynclist) { | |
580 | if (as->bulk_status == AS_UNLINK) { | |
581 | as->bulk_status = 0; /* Only once */ | |
4e09dcf2 HL |
582 | urb = as->urb; |
583 | usb_get_urb(urb); | |
01c6460f | 584 | spin_unlock(&ps->lock); /* Allow completions */ |
4e09dcf2 HL |
585 | usb_unlink_urb(urb); |
586 | usb_put_urb(urb); | |
01c6460f AS |
587 | spin_lock(&ps->lock); |
588 | goto rescan; | |
589 | } | |
590 | } | |
591 | } | |
592 | ||
7d12e780 | 593 | static void async_completed(struct urb *urb) |
1da177e4 | 594 | { |
04e482ff | 595 | struct async *as = urb->context; |
9b6f0c4b | 596 | struct usb_dev_state *ps = as->ps; |
1da177e4 | 597 | struct siginfo sinfo; |
516a1a07 | 598 | struct pid *pid = NULL; |
516a1a07 | 599 | u32 secid = 0; |
d178bc3a | 600 | const struct cred *cred = NULL; |
516a1a07 | 601 | int signr; |
1da177e4 | 602 | |
04e482ff GKH |
603 | spin_lock(&ps->lock); |
604 | list_move_tail(&as->asynclist, &ps->async_completed); | |
e015268d | 605 | as->status = urb->status; |
516a1a07 ON |
606 | signr = as->signr; |
607 | if (signr) { | |
f0c2b681 | 608 | memset(&sinfo, 0, sizeof(sinfo)); |
1da177e4 | 609 | sinfo.si_signo = as->signr; |
e015268d | 610 | sinfo.si_errno = as->status; |
1da177e4 LT |
611 | sinfo.si_code = SI_ASYNCIO; |
612 | sinfo.si_addr = as->userurb; | |
aec01c58 | 613 | pid = get_pid(as->pid); |
d178bc3a | 614 | cred = get_cred(as->cred); |
516a1a07 | 615 | secid = as->secid; |
1da177e4 | 616 | } |
e639dd3f | 617 | snoop(&urb->dev->dev, "urb complete\n"); |
4c6e8971 | 618 | snoop_urb(urb->dev, as->userurb, urb->pipe, urb->actual_length, |
3d97ff63 | 619 | as->status, COMPLETE, NULL, 0); |
83ed07c5 | 620 | if ((urb->transfer_flags & URB_DIR_MASK) == URB_DIR_IN) |
3d97ff63 HG |
621 | snoop_urb_data(urb, urb->actual_length); |
622 | ||
01c6460f AS |
623 | if (as->status < 0 && as->bulk_addr && as->status != -ECONNRESET && |
624 | as->status != -ENOENT) | |
625 | cancel_bulk_urbs(ps, as->bulk_addr); | |
516a1a07 ON |
626 | spin_unlock(&ps->lock); |
627 | ||
aec01c58 | 628 | if (signr) { |
d178bc3a | 629 | kill_pid_info_as_cred(sinfo.si_signo, &sinfo, pid, cred, secid); |
aec01c58 | 630 | put_pid(pid); |
d178bc3a | 631 | put_cred(cred); |
aec01c58 | 632 | } |
516a1a07 | 633 | |
e639dd3f | 634 | wake_up(&ps->wait); |
1da177e4 LT |
635 | } |
636 | ||
9b6f0c4b | 637 | static void destroy_async(struct usb_dev_state *ps, struct list_head *list) |
1da177e4 | 638 | { |
4e09dcf2 | 639 | struct urb *urb; |
1da177e4 LT |
640 | struct async *as; |
641 | unsigned long flags; | |
642 | ||
643 | spin_lock_irqsave(&ps->lock, flags); | |
644 | while (!list_empty(list)) { | |
645 | as = list_entry(list->next, struct async, asynclist); | |
646 | list_del_init(&as->asynclist); | |
4e09dcf2 HL |
647 | urb = as->urb; |
648 | usb_get_urb(urb); | |
1da177e4 LT |
649 | |
650 | /* drop the spinlock so the completion handler can run */ | |
651 | spin_unlock_irqrestore(&ps->lock, flags); | |
4e09dcf2 HL |
652 | usb_kill_urb(urb); |
653 | usb_put_urb(urb); | |
1da177e4 LT |
654 | spin_lock_irqsave(&ps->lock, flags); |
655 | } | |
656 | spin_unlock_irqrestore(&ps->lock, flags); | |
1da177e4 LT |
657 | } |
658 | ||
9b6f0c4b | 659 | static void destroy_async_on_interface(struct usb_dev_state *ps, |
04e482ff | 660 | unsigned int ifnum) |
1da177e4 LT |
661 | { |
662 | struct list_head *p, *q, hitlist; | |
663 | unsigned long flags; | |
664 | ||
665 | INIT_LIST_HEAD(&hitlist); | |
666 | spin_lock_irqsave(&ps->lock, flags); | |
667 | list_for_each_safe(p, q, &ps->async_pending) | |
668 | if (ifnum == list_entry(p, struct async, asynclist)->ifnum) | |
669 | list_move_tail(p, &hitlist); | |
670 | spin_unlock_irqrestore(&ps->lock, flags); | |
671 | destroy_async(ps, &hitlist); | |
672 | } | |
673 | ||
9b6f0c4b | 674 | static void destroy_all_async(struct usb_dev_state *ps) |
1da177e4 | 675 | { |
04e482ff | 676 | destroy_async(ps, &ps->async_pending); |
1da177e4 LT |
677 | } |
678 | ||
679 | /* | |
680 | * interface claims are made only at the request of user level code, | |
681 | * which can also release them (explicitly or by closing files). | |
682 | * they're also undone when devices disconnect. | |
683 | */ | |
684 | ||
04e482ff GKH |
685 | static int driver_probe(struct usb_interface *intf, |
686 | const struct usb_device_id *id) | |
1da177e4 LT |
687 | { |
688 | return -ENODEV; | |
689 | } | |
690 | ||
691 | static void driver_disconnect(struct usb_interface *intf) | |
692 | { | |
9b6f0c4b | 693 | struct usb_dev_state *ps = usb_get_intfdata(intf); |
1da177e4 LT |
694 | unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber; |
695 | ||
696 | if (!ps) | |
697 | return; | |
698 | ||
699 | /* NOTE: this relies on usbcore having canceled and completed | |
700 | * all pending I/O requests; 2.6 does that. | |
701 | */ | |
702 | ||
703 | if (likely(ifnum < 8*sizeof(ps->ifclaimed))) | |
704 | clear_bit(ifnum, &ps->ifclaimed); | |
705 | else | |
3b6004f3 GKH |
706 | dev_warn(&intf->dev, "interface number %u out of range\n", |
707 | ifnum); | |
1da177e4 | 708 | |
04e482ff | 709 | usb_set_intfdata(intf, NULL); |
1da177e4 LT |
710 | |
711 | /* force async requests to complete */ | |
712 | destroy_async_on_interface(ps, ifnum); | |
713 | } | |
714 | ||
2e2eb83f AS |
715 | /* The following routines are merely placeholders. There is no way |
716 | * to inform a user task about suspend or resumes. | |
717 | */ | |
718 | static int driver_suspend(struct usb_interface *intf, pm_message_t msg) | |
719 | { | |
720 | return 0; | |
721 | } | |
722 | ||
723 | static int driver_resume(struct usb_interface *intf) | |
724 | { | |
725 | return 0; | |
726 | } | |
727 | ||
1da177e4 | 728 | struct usb_driver usbfs_driver = { |
1da177e4 LT |
729 | .name = "usbfs", |
730 | .probe = driver_probe, | |
731 | .disconnect = driver_disconnect, | |
2e2eb83f AS |
732 | .suspend = driver_suspend, |
733 | .resume = driver_resume, | |
1da177e4 LT |
734 | }; |
735 | ||
9b6f0c4b | 736 | static int claimintf(struct usb_dev_state *ps, unsigned int ifnum) |
1da177e4 LT |
737 | { |
738 | struct usb_device *dev = ps->dev; | |
739 | struct usb_interface *intf; | |
740 | int err; | |
741 | ||
742 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
743 | return -EINVAL; | |
744 | /* already claimed */ | |
745 | if (test_bit(ifnum, &ps->ifclaimed)) | |
746 | return 0; | |
747 | ||
d883f52e RG |
748 | if (ps->privileges_dropped && |
749 | !test_bit(ifnum, &ps->interface_allowed_mask)) | |
750 | return -EACCES; | |
751 | ||
1da177e4 LT |
752 | intf = usb_ifnum_to_if(dev, ifnum); |
753 | if (!intf) | |
754 | err = -ENOENT; | |
755 | else | |
756 | err = usb_driver_claim_interface(&usbfs_driver, intf, ps); | |
1da177e4 LT |
757 | if (err == 0) |
758 | set_bit(ifnum, &ps->ifclaimed); | |
759 | return err; | |
760 | } | |
761 | ||
9b6f0c4b | 762 | static int releaseintf(struct usb_dev_state *ps, unsigned int ifnum) |
1da177e4 LT |
763 | { |
764 | struct usb_device *dev; | |
765 | struct usb_interface *intf; | |
766 | int err; | |
767 | ||
768 | err = -EINVAL; | |
769 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
770 | return err; | |
771 | dev = ps->dev; | |
1da177e4 LT |
772 | intf = usb_ifnum_to_if(dev, ifnum); |
773 | if (!intf) | |
774 | err = -ENOENT; | |
775 | else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) { | |
776 | usb_driver_release_interface(&usbfs_driver, intf); | |
777 | err = 0; | |
778 | } | |
1da177e4 LT |
779 | return err; |
780 | } | |
781 | ||
9b6f0c4b | 782 | static int checkintf(struct usb_dev_state *ps, unsigned int ifnum) |
1da177e4 LT |
783 | { |
784 | if (ps->dev->state != USB_STATE_CONFIGURED) | |
785 | return -EHOSTUNREACH; | |
786 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
787 | return -EINVAL; | |
788 | if (test_bit(ifnum, &ps->ifclaimed)) | |
789 | return 0; | |
790 | /* if not yet claimed, claim it for the driver */ | |
04e482ff GKH |
791 | dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim " |
792 | "interface %u before use\n", task_pid_nr(current), | |
793 | current->comm, ifnum); | |
1da177e4 LT |
794 | return claimintf(ps, ifnum); |
795 | } | |
796 | ||
797 | static int findintfep(struct usb_device *dev, unsigned int ep) | |
798 | { | |
799 | unsigned int i, j, e; | |
04e482ff | 800 | struct usb_interface *intf; |
1da177e4 LT |
801 | struct usb_host_interface *alts; |
802 | struct usb_endpoint_descriptor *endpt; | |
803 | ||
804 | if (ep & ~(USB_DIR_IN|0xf)) | |
805 | return -EINVAL; | |
806 | if (!dev->actconfig) | |
807 | return -ESRCH; | |
808 | for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) { | |
809 | intf = dev->actconfig->interface[i]; | |
810 | for (j = 0; j < intf->num_altsetting; j++) { | |
04e482ff | 811 | alts = &intf->altsetting[j]; |
1da177e4 LT |
812 | for (e = 0; e < alts->desc.bNumEndpoints; e++) { |
813 | endpt = &alts->endpoint[e].desc; | |
814 | if (endpt->bEndpointAddress == ep) | |
815 | return alts->desc.bInterfaceNumber; | |
816 | } | |
817 | } | |
818 | } | |
04e482ff | 819 | return -ENOENT; |
1da177e4 LT |
820 | } |
821 | ||
9b6f0c4b | 822 | static int check_ctrlrecip(struct usb_dev_state *ps, unsigned int requesttype, |
393cbb51 | 823 | unsigned int request, unsigned int index) |
1da177e4 LT |
824 | { |
825 | int ret = 0; | |
393cbb51 | 826 | struct usb_host_interface *alt_setting; |
1da177e4 | 827 | |
6da9c990 DV |
828 | if (ps->dev->state != USB_STATE_UNAUTHENTICATED |
829 | && ps->dev->state != USB_STATE_ADDRESS | |
24f8b116 | 830 | && ps->dev->state != USB_STATE_CONFIGURED) |
1da177e4 LT |
831 | return -EHOSTUNREACH; |
832 | if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype)) | |
833 | return 0; | |
834 | ||
393cbb51 MD |
835 | /* |
836 | * check for the special corner case 'get_device_id' in the printer | |
5dc50c35 HG |
837 | * class specification, which we always want to allow as it is used |
838 | * to query things like ink level, etc. | |
393cbb51 MD |
839 | */ |
840 | if (requesttype == 0xa1 && request == 0) { | |
841 | alt_setting = usb_find_alt_setting(ps->dev->actconfig, | |
842 | index >> 8, index & 0xff); | |
843 | if (alt_setting | |
844 | && alt_setting->desc.bInterfaceClass == USB_CLASS_PRINTER) | |
5dc50c35 | 845 | return 0; |
393cbb51 MD |
846 | } |
847 | ||
1da177e4 LT |
848 | index &= 0xff; |
849 | switch (requesttype & USB_RECIP_MASK) { | |
850 | case USB_RECIP_ENDPOINT: | |
1361bf4b HG |
851 | if ((index & ~USB_DIR_IN) == 0) |
852 | return 0; | |
04e482ff | 853 | ret = findintfep(ps->dev, index); |
831abf76 KG |
854 | if (ret < 0) { |
855 | /* | |
856 | * Some not fully compliant Win apps seem to get | |
857 | * index wrong and have the endpoint number here | |
858 | * rather than the endpoint address (with the | |
859 | * correct direction). Win does let this through, | |
860 | * so we'll not reject it here but leave it to | |
861 | * the device to not break KVM. But we warn. | |
862 | */ | |
863 | ret = findintfep(ps->dev, index ^ 0x80); | |
864 | if (ret >= 0) | |
865 | dev_info(&ps->dev->dev, | |
866 | "%s: process %i (%s) requesting ep %02x but needs %02x\n", | |
867 | __func__, task_pid_nr(current), | |
868 | current->comm, index, index ^ 0x80); | |
869 | } | |
04e482ff | 870 | if (ret >= 0) |
1da177e4 LT |
871 | ret = checkintf(ps, ret); |
872 | break; | |
873 | ||
874 | case USB_RECIP_INTERFACE: | |
875 | ret = checkintf(ps, index); | |
876 | break; | |
877 | } | |
878 | return ret; | |
879 | } | |
880 | ||
2fec32b0 HG |
881 | static struct usb_host_endpoint *ep_to_host_endpoint(struct usb_device *dev, |
882 | unsigned char ep) | |
883 | { | |
884 | if (ep & USB_ENDPOINT_DIR_MASK) | |
885 | return dev->ep_in[ep & USB_ENDPOINT_NUMBER_MASK]; | |
886 | else | |
887 | return dev->ep_out[ep & USB_ENDPOINT_NUMBER_MASK]; | |
888 | } | |
889 | ||
3e75c6de | 890 | static int parse_usbdevfs_streams(struct usb_dev_state *ps, |
bcf7f6e3 HG |
891 | struct usbdevfs_streams __user *streams, |
892 | unsigned int *num_streams_ret, | |
893 | unsigned int *num_eps_ret, | |
894 | struct usb_host_endpoint ***eps_ret, | |
895 | struct usb_interface **intf_ret) | |
896 | { | |
897 | unsigned int i, num_streams, num_eps; | |
898 | struct usb_host_endpoint **eps; | |
899 | struct usb_interface *intf = NULL; | |
900 | unsigned char ep; | |
901 | int ifnum, ret; | |
902 | ||
903 | if (get_user(num_streams, &streams->num_streams) || | |
904 | get_user(num_eps, &streams->num_eps)) | |
905 | return -EFAULT; | |
906 | ||
907 | if (num_eps < 1 || num_eps > USB_MAXENDPOINTS) | |
908 | return -EINVAL; | |
909 | ||
910 | /* The XHCI controller allows max 2 ^ 16 streams */ | |
911 | if (num_streams_ret && (num_streams < 2 || num_streams > 65536)) | |
912 | return -EINVAL; | |
913 | ||
914 | eps = kmalloc(num_eps * sizeof(*eps), GFP_KERNEL); | |
915 | if (!eps) | |
916 | return -ENOMEM; | |
917 | ||
918 | for (i = 0; i < num_eps; i++) { | |
919 | if (get_user(ep, &streams->eps[i])) { | |
920 | ret = -EFAULT; | |
921 | goto error; | |
922 | } | |
923 | eps[i] = ep_to_host_endpoint(ps->dev, ep); | |
924 | if (!eps[i]) { | |
925 | ret = -EINVAL; | |
926 | goto error; | |
927 | } | |
928 | ||
929 | /* usb_alloc/free_streams operate on an usb_interface */ | |
930 | ifnum = findintfep(ps->dev, ep); | |
931 | if (ifnum < 0) { | |
932 | ret = ifnum; | |
933 | goto error; | |
934 | } | |
935 | ||
936 | if (i == 0) { | |
937 | ret = checkintf(ps, ifnum); | |
938 | if (ret < 0) | |
939 | goto error; | |
940 | intf = usb_ifnum_to_if(ps->dev, ifnum); | |
941 | } else { | |
942 | /* Verify all eps belong to the same interface */ | |
943 | if (ifnum != intf->altsetting->desc.bInterfaceNumber) { | |
944 | ret = -EINVAL; | |
945 | goto error; | |
946 | } | |
947 | } | |
948 | } | |
949 | ||
950 | if (num_streams_ret) | |
951 | *num_streams_ret = num_streams; | |
952 | *num_eps_ret = num_eps; | |
953 | *eps_ret = eps; | |
954 | *intf_ret = intf; | |
955 | ||
956 | return 0; | |
957 | ||
958 | error: | |
959 | kfree(eps); | |
960 | return ret; | |
961 | } | |
962 | ||
61ad04a8 | 963 | static int match_devt(struct device *dev, void *data) |
4592bf5a | 964 | { |
a80d5ff0 | 965 | return dev->devt == (dev_t) (unsigned long) data; |
9f8b17e6 | 966 | } |
4592bf5a | 967 | |
61ad04a8 | 968 | static struct usb_device *usbdev_lookup_by_devt(dev_t devt) |
9f8b17e6 KS |
969 | { |
970 | struct device *dev; | |
971 | ||
a80d5ff0 DH |
972 | dev = bus_find_device(&usb_bus_type, NULL, |
973 | (void *) (unsigned long) devt, match_devt); | |
9f8b17e6 KS |
974 | if (!dev) |
975 | return NULL; | |
69ab55d7 | 976 | return to_usb_device(dev); |
9f8b17e6 | 977 | } |
4592bf5a | 978 | |
1da177e4 LT |
979 | /* |
980 | * file operations | |
981 | */ | |
982 | static int usbdev_open(struct inode *inode, struct file *file) | |
983 | { | |
fbf82fd2 | 984 | struct usb_device *dev = NULL; |
9b6f0c4b | 985 | struct usb_dev_state *ps; |
1da177e4 LT |
986 | int ret; |
987 | ||
1da177e4 | 988 | ret = -ENOMEM; |
d883f52e | 989 | ps = kzalloc(sizeof(struct usb_dev_state), GFP_KERNEL); |
04e482ff | 990 | if (!ps) |
62e299e6 | 991 | goto out_free_ps; |
1da177e4 | 992 | |
01105a24 | 993 | ret = -ENODEV; |
61ad04a8 | 994 | |
62e299e6 AS |
995 | /* Protect against simultaneous removal or release */ |
996 | mutex_lock(&usbfs_mutex); | |
997 | ||
9f8b17e6 | 998 | /* usbdev device-node */ |
fbf82fd2 | 999 | if (imajor(inode) == USB_DEVICE_MAJOR) |
61ad04a8 | 1000 | dev = usbdev_lookup_by_devt(inode->i_rdev); |
62e299e6 | 1001 | |
62e299e6 AS |
1002 | mutex_unlock(&usbfs_mutex); |
1003 | ||
1004 | if (!dev) | |
1005 | goto out_free_ps; | |
1006 | ||
1007 | usb_lock_device(dev); | |
1008 | if (dev->state == USB_STATE_NOTATTACHED) | |
1009 | goto out_unlock_device; | |
1010 | ||
94fcda1f | 1011 | ret = usb_autoresume_device(dev); |
01d883d4 | 1012 | if (ret) |
62e299e6 | 1013 | goto out_unlock_device; |
01d883d4 | 1014 | |
1da177e4 LT |
1015 | ps->dev = dev; |
1016 | ps->file = file; | |
d883f52e | 1017 | ps->interface_allowed_mask = 0xFFFFFFFF; /* 32 bits */ |
1da177e4 | 1018 | spin_lock_init(&ps->lock); |
316547fd | 1019 | INIT_LIST_HEAD(&ps->list); |
1da177e4 LT |
1020 | INIT_LIST_HEAD(&ps->async_pending); |
1021 | INIT_LIST_HEAD(&ps->async_completed); | |
f7d34b44 | 1022 | INIT_LIST_HEAD(&ps->memory_list); |
1da177e4 | 1023 | init_waitqueue_head(&ps->wait); |
2425c08b | 1024 | ps->disc_pid = get_pid(task_pid(current)); |
d178bc3a | 1025 | ps->cred = get_current_cred(); |
7a01955f | 1026 | security_task_getsecid(current, &ps->secid); |
527660a8 | 1027 | smp_wmb(); |
1da177e4 LT |
1028 | list_add_tail(&ps->list, &dev->filelist); |
1029 | file->private_data = ps; | |
62e299e6 | 1030 | usb_unlock_device(dev); |
2da41d5f AS |
1031 | snoop(&dev->dev, "opened by process %d: %s\n", task_pid_nr(current), |
1032 | current->comm); | |
62e299e6 AS |
1033 | return ret; |
1034 | ||
1035 | out_unlock_device: | |
1036 | usb_unlock_device(dev); | |
1037 | usb_put_dev(dev); | |
1038 | out_free_ps: | |
1039 | kfree(ps); | |
4a2a8a2c | 1040 | return ret; |
1da177e4 LT |
1041 | } |
1042 | ||
1043 | static int usbdev_release(struct inode *inode, struct file *file) | |
1044 | { | |
9b6f0c4b | 1045 | struct usb_dev_state *ps = file->private_data; |
1da177e4 LT |
1046 | struct usb_device *dev = ps->dev; |
1047 | unsigned int ifnum; | |
6ff10464 | 1048 | struct async *as; |
1da177e4 LT |
1049 | |
1050 | usb_lock_device(dev); | |
7cbe5dca | 1051 | usb_hub_release_all_ports(dev, ps); |
4a2a8a2c | 1052 | |
1da177e4 | 1053 | list_del_init(&ps->list); |
4a2a8a2c | 1054 | |
1da177e4 LT |
1055 | for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed); |
1056 | ifnum++) { | |
1057 | if (test_bit(ifnum, &ps->ifclaimed)) | |
1058 | releaseintf(ps, ifnum); | |
1059 | } | |
1060 | destroy_all_async(ps); | |
94fcda1f | 1061 | usb_autosuspend_device(dev); |
1da177e4 LT |
1062 | usb_unlock_device(dev); |
1063 | usb_put_dev(dev); | |
2425c08b | 1064 | put_pid(ps->disc_pid); |
d178bc3a | 1065 | put_cred(ps->cred); |
6ff10464 AS |
1066 | |
1067 | as = async_getcompleted(ps); | |
1068 | while (as) { | |
1069 | free_async(as); | |
1070 | as = async_getcompleted(ps); | |
1071 | } | |
f7d34b44 | 1072 | |
1da177e4 | 1073 | kfree(ps); |
4a2a8a2c | 1074 | return 0; |
1da177e4 LT |
1075 | } |
1076 | ||
9b6f0c4b | 1077 | static int proc_control(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
1078 | { |
1079 | struct usb_device *dev = ps->dev; | |
1080 | struct usbdevfs_ctrltransfer ctrl; | |
1081 | unsigned int tmo; | |
1082 | unsigned char *tbuf; | |
ff66e3ce | 1083 | unsigned wLength; |
4c6e8971 | 1084 | int i, pipe, ret; |
1da177e4 LT |
1085 | |
1086 | if (copy_from_user(&ctrl, arg, sizeof(ctrl))) | |
1087 | return -EFAULT; | |
393cbb51 MD |
1088 | ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.bRequest, |
1089 | ctrl.wIndex); | |
04e482ff | 1090 | if (ret) |
1da177e4 | 1091 | return ret; |
ff66e3ce AM |
1092 | wLength = ctrl.wLength; /* To suppress 64k PAGE_SIZE warning */ |
1093 | if (wLength > PAGE_SIZE) | |
1da177e4 | 1094 | return -EINVAL; |
add1aaea AS |
1095 | ret = usbfs_increase_memory_usage(PAGE_SIZE + sizeof(struct urb) + |
1096 | sizeof(struct usb_ctrlrequest)); | |
1097 | if (ret) | |
1098 | return ret; | |
04e482ff | 1099 | tbuf = (unsigned char *)__get_free_page(GFP_KERNEL); |
add1aaea AS |
1100 | if (!tbuf) { |
1101 | ret = -ENOMEM; | |
1102 | goto done; | |
1103 | } | |
1da177e4 | 1104 | tmo = ctrl.timeout; |
0880aef4 CF |
1105 | snoop(&dev->dev, "control urb: bRequestType=%02x " |
1106 | "bRequest=%02x wValue=%04x " | |
1107 | "wIndex=%04x wLength=%04x\n", | |
c8f2efc8 XR |
1108 | ctrl.bRequestType, ctrl.bRequest, ctrl.wValue, |
1109 | ctrl.wIndex, ctrl.wLength); | |
1da177e4 | 1110 | if (ctrl.bRequestType & 0x80) { |
04e482ff GKH |
1111 | if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data, |
1112 | ctrl.wLength)) { | |
52fb743d AS |
1113 | ret = -EINVAL; |
1114 | goto done; | |
1da177e4 | 1115 | } |
4c6e8971 | 1116 | pipe = usb_rcvctrlpipe(dev, 0); |
0880aef4 | 1117 | snoop_urb(dev, NULL, pipe, ctrl.wLength, tmo, SUBMIT, NULL, 0); |
1da177e4 LT |
1118 | |
1119 | usb_unlock_device(dev); | |
4c6e8971 | 1120 | i = usb_control_msg(dev, pipe, ctrl.bRequest, |
04e482ff GKH |
1121 | ctrl.bRequestType, ctrl.wValue, ctrl.wIndex, |
1122 | tbuf, ctrl.wLength, tmo); | |
1da177e4 | 1123 | usb_lock_device(dev); |
0880aef4 | 1124 | snoop_urb(dev, NULL, pipe, max(i, 0), min(i, 0), COMPLETE, |
9d02b426 | 1125 | tbuf, max(i, 0)); |
1da177e4 | 1126 | if ((i > 0) && ctrl.wLength) { |
fe0410c7 | 1127 | if (copy_to_user(ctrl.data, tbuf, i)) { |
52fb743d AS |
1128 | ret = -EFAULT; |
1129 | goto done; | |
1da177e4 LT |
1130 | } |
1131 | } | |
1132 | } else { | |
1133 | if (ctrl.wLength) { | |
1134 | if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) { | |
52fb743d AS |
1135 | ret = -EFAULT; |
1136 | goto done; | |
1da177e4 LT |
1137 | } |
1138 | } | |
4c6e8971 | 1139 | pipe = usb_sndctrlpipe(dev, 0); |
0880aef4 CF |
1140 | snoop_urb(dev, NULL, pipe, ctrl.wLength, tmo, SUBMIT, |
1141 | tbuf, ctrl.wLength); | |
4c6e8971 | 1142 | |
1da177e4 | 1143 | usb_unlock_device(dev); |
04e482ff GKH |
1144 | i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest, |
1145 | ctrl.bRequestType, ctrl.wValue, ctrl.wIndex, | |
1146 | tbuf, ctrl.wLength, tmo); | |
1da177e4 | 1147 | usb_lock_device(dev); |
0880aef4 | 1148 | snoop_urb(dev, NULL, pipe, max(i, 0), min(i, 0), COMPLETE, NULL, 0); |
1da177e4 | 1149 | } |
04e482ff | 1150 | if (i < 0 && i != -EPIPE) { |
1da177e4 LT |
1151 | dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL " |
1152 | "failed cmd %s rqt %u rq %u len %u ret %d\n", | |
1153 | current->comm, ctrl.bRequestType, ctrl.bRequest, | |
1154 | ctrl.wLength, i); | |
1155 | } | |
52fb743d AS |
1156 | ret = i; |
1157 | done: | |
1158 | free_page((unsigned long) tbuf); | |
add1aaea AS |
1159 | usbfs_decrease_memory_usage(PAGE_SIZE + sizeof(struct urb) + |
1160 | sizeof(struct usb_ctrlrequest)); | |
52fb743d | 1161 | return ret; |
1da177e4 LT |
1162 | } |
1163 | ||
9b6f0c4b | 1164 | static int proc_bulk(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
1165 | { |
1166 | struct usb_device *dev = ps->dev; | |
1167 | struct usbdevfs_bulktransfer bulk; | |
1168 | unsigned int tmo, len1, pipe; | |
1169 | int len2; | |
1170 | unsigned char *tbuf; | |
4c6e8971 | 1171 | int i, ret; |
1da177e4 LT |
1172 | |
1173 | if (copy_from_user(&bulk, arg, sizeof(bulk))) | |
1174 | return -EFAULT; | |
04e482ff GKH |
1175 | ret = findintfep(ps->dev, bulk.ep); |
1176 | if (ret < 0) | |
1da177e4 | 1177 | return ret; |
04e482ff GKH |
1178 | ret = checkintf(ps, ret); |
1179 | if (ret) | |
1da177e4 LT |
1180 | return ret; |
1181 | if (bulk.ep & USB_DIR_IN) | |
1182 | pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f); | |
1183 | else | |
1184 | pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f); | |
1185 | if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN))) | |
1186 | return -EINVAL; | |
1187 | len1 = bulk.len; | |
1129d270 | 1188 | if (len1 >= (INT_MAX - sizeof(struct urb))) |
1da177e4 | 1189 | return -EINVAL; |
add1aaea AS |
1190 | ret = usbfs_increase_memory_usage(len1 + sizeof(struct urb)); |
1191 | if (ret) | |
1192 | return ret; | |
135551ea KB |
1193 | tbuf = kmalloc(len1, GFP_KERNEL); |
1194 | if (!tbuf) { | |
add1aaea AS |
1195 | ret = -ENOMEM; |
1196 | goto done; | |
1197 | } | |
1da177e4 LT |
1198 | tmo = bulk.timeout; |
1199 | if (bulk.ep & 0x80) { | |
1200 | if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) { | |
52fb743d AS |
1201 | ret = -EINVAL; |
1202 | goto done; | |
1da177e4 | 1203 | } |
0880aef4 | 1204 | snoop_urb(dev, NULL, pipe, len1, tmo, SUBMIT, NULL, 0); |
4c6e8971 | 1205 | |
1da177e4 LT |
1206 | usb_unlock_device(dev); |
1207 | i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo); | |
1208 | usb_lock_device(dev); | |
0880aef4 | 1209 | snoop_urb(dev, NULL, pipe, len2, i, COMPLETE, tbuf, len2); |
4c6e8971 | 1210 | |
1da177e4 LT |
1211 | if (!i && len2) { |
1212 | if (copy_to_user(bulk.data, tbuf, len2)) { | |
52fb743d AS |
1213 | ret = -EFAULT; |
1214 | goto done; | |
1da177e4 LT |
1215 | } |
1216 | } | |
1217 | } else { | |
1218 | if (len1) { | |
1219 | if (copy_from_user(tbuf, bulk.data, len1)) { | |
52fb743d AS |
1220 | ret = -EFAULT; |
1221 | goto done; | |
1da177e4 LT |
1222 | } |
1223 | } | |
0880aef4 | 1224 | snoop_urb(dev, NULL, pipe, len1, tmo, SUBMIT, tbuf, len1); |
4c6e8971 | 1225 | |
1da177e4 LT |
1226 | usb_unlock_device(dev); |
1227 | i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo); | |
1228 | usb_lock_device(dev); | |
0880aef4 | 1229 | snoop_urb(dev, NULL, pipe, len2, i, COMPLETE, NULL, 0); |
1da177e4 | 1230 | } |
52fb743d AS |
1231 | ret = (i < 0 ? i : len2); |
1232 | done: | |
1da177e4 | 1233 | kfree(tbuf); |
add1aaea | 1234 | usbfs_decrease_memory_usage(len1 + sizeof(struct urb)); |
52fb743d | 1235 | return ret; |
1da177e4 LT |
1236 | } |
1237 | ||
f080a51b AS |
1238 | static void check_reset_of_active_ep(struct usb_device *udev, |
1239 | unsigned int epnum, char *ioctl_name) | |
1240 | { | |
1241 | struct usb_host_endpoint **eps; | |
1242 | struct usb_host_endpoint *ep; | |
1243 | ||
1244 | eps = (epnum & USB_DIR_IN) ? udev->ep_in : udev->ep_out; | |
1245 | ep = eps[epnum & 0x0f]; | |
1246 | if (ep && !list_empty(&ep->urb_list)) | |
1247 | dev_warn(&udev->dev, "Process %d (%s) called USBDEVFS_%s for active endpoint 0x%02x\n", | |
1248 | task_pid_nr(current), current->comm, | |
1249 | ioctl_name, epnum); | |
1250 | } | |
1251 | ||
9b6f0c4b | 1252 | static int proc_resetep(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
1253 | { |
1254 | unsigned int ep; | |
1255 | int ret; | |
1256 | ||
1257 | if (get_user(ep, (unsigned int __user *)arg)) | |
1258 | return -EFAULT; | |
04e482ff GKH |
1259 | ret = findintfep(ps->dev, ep); |
1260 | if (ret < 0) | |
1da177e4 | 1261 | return ret; |
04e482ff GKH |
1262 | ret = checkintf(ps, ret); |
1263 | if (ret) | |
1da177e4 | 1264 | return ret; |
f080a51b | 1265 | check_reset_of_active_ep(ps->dev, ep, "RESETEP"); |
3444b26a | 1266 | usb_reset_endpoint(ps->dev, ep); |
1da177e4 LT |
1267 | return 0; |
1268 | } | |
1269 | ||
9b6f0c4b | 1270 | static int proc_clearhalt(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
1271 | { |
1272 | unsigned int ep; | |
1273 | int pipe; | |
1274 | int ret; | |
1275 | ||
1276 | if (get_user(ep, (unsigned int __user *)arg)) | |
1277 | return -EFAULT; | |
04e482ff GKH |
1278 | ret = findintfep(ps->dev, ep); |
1279 | if (ret < 0) | |
1da177e4 | 1280 | return ret; |
04e482ff GKH |
1281 | ret = checkintf(ps, ret); |
1282 | if (ret) | |
1da177e4 | 1283 | return ret; |
f080a51b | 1284 | check_reset_of_active_ep(ps->dev, ep, "CLEAR_HALT"); |
1da177e4 | 1285 | if (ep & USB_DIR_IN) |
04e482ff GKH |
1286 | pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f); |
1287 | else | |
1288 | pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f); | |
1da177e4 LT |
1289 | |
1290 | return usb_clear_halt(ps->dev, pipe); | |
1291 | } | |
1da177e4 | 1292 | |
9b6f0c4b | 1293 | static int proc_getdriver(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
1294 | { |
1295 | struct usbdevfs_getdriver gd; | |
1296 | struct usb_interface *intf; | |
1297 | int ret; | |
1298 | ||
1299 | if (copy_from_user(&gd, arg, sizeof(gd))) | |
1300 | return -EFAULT; | |
1da177e4 LT |
1301 | intf = usb_ifnum_to_if(ps->dev, gd.interface); |
1302 | if (!intf || !intf->dev.driver) | |
1303 | ret = -ENODATA; | |
1304 | else { | |
b11b2e1b | 1305 | strlcpy(gd.driver, intf->dev.driver->name, |
1da177e4 LT |
1306 | sizeof(gd.driver)); |
1307 | ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0); | |
1308 | } | |
1da177e4 LT |
1309 | return ret; |
1310 | } | |
1311 | ||
9b6f0c4b | 1312 | static int proc_connectinfo(struct usb_dev_state *ps, void __user *arg) |
1da177e4 | 1313 | { |
681fef83 KL |
1314 | struct usbdevfs_connectinfo ci; |
1315 | ||
1316 | memset(&ci, 0, sizeof(ci)); | |
1317 | ci.devnum = ps->dev->devnum; | |
1318 | ci.slow = ps->dev->speed == USB_SPEED_LOW; | |
1da177e4 | 1319 | |
1da177e4 LT |
1320 | if (copy_to_user(arg, &ci, sizeof(ci))) |
1321 | return -EFAULT; | |
1322 | return 0; | |
1323 | } | |
1324 | ||
9b6f0c4b | 1325 | static int proc_resetdevice(struct usb_dev_state *ps) |
1da177e4 | 1326 | { |
d883f52e RG |
1327 | struct usb_host_config *actconfig = ps->dev->actconfig; |
1328 | struct usb_interface *interface; | |
1329 | int i, number; | |
1330 | ||
1331 | /* Don't allow a device reset if the process has dropped the | |
1332 | * privilege to do such things and any of the interfaces are | |
1333 | * currently claimed. | |
1334 | */ | |
1335 | if (ps->privileges_dropped && actconfig) { | |
1336 | for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) { | |
1337 | interface = actconfig->interface[i]; | |
1338 | number = interface->cur_altsetting->desc.bInterfaceNumber; | |
1339 | if (usb_interface_claimed(interface) && | |
1340 | !test_bit(number, &ps->ifclaimed)) { | |
1341 | dev_warn(&ps->dev->dev, | |
1342 | "usbfs: interface %d claimed by %s while '%s' resets device\n", | |
1343 | number, interface->dev.driver->name, current->comm); | |
1344 | return -EACCES; | |
1345 | } | |
1346 | } | |
1347 | } | |
1348 | ||
742120c6 | 1349 | return usb_reset_device(ps->dev); |
1da177e4 LT |
1350 | } |
1351 | ||
9b6f0c4b | 1352 | static int proc_setintf(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
1353 | { |
1354 | struct usbdevfs_setinterface setintf; | |
1355 | int ret; | |
1356 | ||
1357 | if (copy_from_user(&setintf, arg, sizeof(setintf))) | |
1358 | return -EFAULT; | |
135551ea KB |
1359 | ret = checkintf(ps, setintf.interface); |
1360 | if (ret) | |
1da177e4 | 1361 | return ret; |
5ec9c177 HG |
1362 | |
1363 | destroy_async_on_interface(ps, setintf.interface); | |
1364 | ||
1da177e4 LT |
1365 | return usb_set_interface(ps->dev, setintf.interface, |
1366 | setintf.altsetting); | |
1367 | } | |
1368 | ||
9b6f0c4b | 1369 | static int proc_setconfig(struct usb_dev_state *ps, void __user *arg) |
1da177e4 | 1370 | { |
3f141e2a | 1371 | int u; |
1da177e4 | 1372 | int status = 0; |
04e482ff | 1373 | struct usb_host_config *actconfig; |
1da177e4 | 1374 | |
3f141e2a | 1375 | if (get_user(u, (int __user *)arg)) |
1da177e4 LT |
1376 | return -EFAULT; |
1377 | ||
04e482ff GKH |
1378 | actconfig = ps->dev->actconfig; |
1379 | ||
1380 | /* Don't touch the device if any interfaces are claimed. | |
1381 | * It could interfere with other drivers' operations, and if | |
1da177e4 LT |
1382 | * an interface is claimed by usbfs it could easily deadlock. |
1383 | */ | |
04e482ff GKH |
1384 | if (actconfig) { |
1385 | int i; | |
1386 | ||
1387 | for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) { | |
1388 | if (usb_interface_claimed(actconfig->interface[i])) { | |
1389 | dev_warn(&ps->dev->dev, | |
72ebddb5 | 1390 | "usbfs: interface %d claimed by %s " |
1da177e4 LT |
1391 | "while '%s' sets config #%d\n", |
1392 | actconfig->interface[i] | |
1393 | ->cur_altsetting | |
1394 | ->desc.bInterfaceNumber, | |
72ebddb5 DB |
1395 | actconfig->interface[i] |
1396 | ->dev.driver->name, | |
1da177e4 | 1397 | current->comm, u); |
04e482ff | 1398 | status = -EBUSY; |
1da177e4 | 1399 | break; |
1da177e4 | 1400 | } |
04e482ff GKH |
1401 | } |
1402 | } | |
1da177e4 LT |
1403 | |
1404 | /* SET_CONFIGURATION is often abused as a "cheap" driver reset, | |
1405 | * so avoid usb_set_configuration()'s kick to sysfs | |
1406 | */ | |
1407 | if (status == 0) { | |
1408 | if (actconfig && actconfig->desc.bConfigurationValue == u) | |
1409 | status = usb_reset_configuration(ps->dev); | |
1410 | else | |
1411 | status = usb_set_configuration(ps->dev, u); | |
1412 | } | |
1413 | ||
1414 | return status; | |
1415 | } | |
1416 | ||
f7d34b44 SG |
1417 | static struct usb_memory * |
1418 | find_memory_area(struct usb_dev_state *ps, const struct usbdevfs_urb *uurb) | |
1419 | { | |
1420 | struct usb_memory *usbm = NULL, *iter; | |
1421 | unsigned long flags; | |
1422 | unsigned long uurb_start = (unsigned long)uurb->buffer; | |
1423 | ||
1424 | spin_lock_irqsave(&ps->lock, flags); | |
1425 | list_for_each_entry(iter, &ps->memory_list, memlist) { | |
1426 | if (uurb_start >= iter->vm_start && | |
1427 | uurb_start < iter->vm_start + iter->size) { | |
1428 | if (uurb->buffer_length > iter->vm_start + iter->size - | |
1429 | uurb_start) { | |
1430 | usbm = ERR_PTR(-EINVAL); | |
1431 | } else { | |
1432 | usbm = iter; | |
1433 | usbm->urb_use_count++; | |
1434 | } | |
1435 | break; | |
1436 | } | |
1437 | } | |
1438 | spin_unlock_irqrestore(&ps->lock, flags); | |
1439 | return usbm; | |
1440 | } | |
1441 | ||
9b6f0c4b | 1442 | static int proc_do_submiturb(struct usb_dev_state *ps, struct usbdevfs_urb *uurb, |
04e482ff GKH |
1443 | struct usbdevfs_iso_packet_desc __user *iso_frame_desc, |
1444 | void __user *arg) | |
1da177e4 LT |
1445 | { |
1446 | struct usbdevfs_iso_packet_desc *isopkt = NULL; | |
1447 | struct usb_host_endpoint *ep; | |
52fb743d | 1448 | struct async *as = NULL; |
1da177e4 LT |
1449 | struct usb_ctrlrequest *dr = NULL; |
1450 | unsigned int u, totlen, isofrmlen; | |
3d97ff63 | 1451 | int i, ret, is_in, num_sgs = 0, ifnum = -1; |
b2d03eb5 | 1452 | int number_of_packets = 0; |
948cd8c1 | 1453 | unsigned int stream_id = 0; |
3d97ff63 | 1454 | void *buf; |
1da177e4 | 1455 | |
14722ef4 AS |
1456 | if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP | |
1457 | USBDEVFS_URB_SHORT_NOT_OK | | |
01c6460f | 1458 | USBDEVFS_URB_BULK_CONTINUATION | |
14722ef4 AS |
1459 | USBDEVFS_URB_NO_FSBR | |
1460 | USBDEVFS_URB_ZERO_PACKET | | |
1461 | USBDEVFS_URB_NO_INTERRUPT)) | |
1da177e4 | 1462 | return -EINVAL; |
9180135b | 1463 | if (uurb->buffer_length > 0 && !uurb->buffer) |
1da177e4 | 1464 | return -EINVAL; |
04e482ff GKH |
1465 | if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL && |
1466 | (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) { | |
1467 | ifnum = findintfep(ps->dev, uurb->endpoint); | |
1468 | if (ifnum < 0) | |
1da177e4 | 1469 | return ifnum; |
04e482ff GKH |
1470 | ret = checkintf(ps, ifnum); |
1471 | if (ret) | |
1da177e4 LT |
1472 | return ret; |
1473 | } | |
2fec32b0 | 1474 | ep = ep_to_host_endpoint(ps->dev, uurb->endpoint); |
1da177e4 LT |
1475 | if (!ep) |
1476 | return -ENOENT; | |
2fec32b0 | 1477 | is_in = (uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0; |
add1aaea AS |
1478 | |
1479 | u = 0; | |
f355e830 | 1480 | switch (uurb->type) { |
1da177e4 | 1481 | case USBDEVFS_URB_TYPE_CONTROL: |
93cf9b90 | 1482 | if (!usb_endpoint_xfer_control(&ep->desc)) |
1da177e4 | 1483 | return -EINVAL; |
add1aaea AS |
1484 | /* min 8 byte setup packet */ |
1485 | if (uurb->buffer_length < 8) | |
1da177e4 | 1486 | return -EINVAL; |
04e482ff GKH |
1487 | dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL); |
1488 | if (!dr) | |
1da177e4 LT |
1489 | return -ENOMEM; |
1490 | if (copy_from_user(dr, uurb->buffer, 8)) { | |
52fb743d AS |
1491 | ret = -EFAULT; |
1492 | goto error; | |
1da177e4 LT |
1493 | } |
1494 | if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) { | |
52fb743d AS |
1495 | ret = -EINVAL; |
1496 | goto error; | |
1da177e4 | 1497 | } |
393cbb51 | 1498 | ret = check_ctrlrecip(ps, dr->bRequestType, dr->bRequest, |
04e482ff | 1499 | le16_to_cpup(&dr->wIndex)); |
52fb743d AS |
1500 | if (ret) |
1501 | goto error; | |
1da177e4 LT |
1502 | uurb->buffer_length = le16_to_cpup(&dr->wLength); |
1503 | uurb->buffer += 8; | |
93cf9b90 AS |
1504 | if ((dr->bRequestType & USB_DIR_IN) && uurb->buffer_length) { |
1505 | is_in = 1; | |
1506 | uurb->endpoint |= USB_DIR_IN; | |
1507 | } else { | |
1508 | is_in = 0; | |
1509 | uurb->endpoint &= ~USB_DIR_IN; | |
1510 | } | |
0880aef4 CF |
1511 | snoop(&ps->dev->dev, "control urb: bRequestType=%02x " |
1512 | "bRequest=%02x wValue=%04x " | |
1513 | "wIndex=%04x wLength=%04x\n", | |
1514 | dr->bRequestType, dr->bRequest, | |
1515 | __le16_to_cpup(&dr->wValue), | |
1516 | __le16_to_cpup(&dr->wIndex), | |
1517 | __le16_to_cpup(&dr->wLength)); | |
add1aaea | 1518 | u = sizeof(struct usb_ctrlrequest); |
1da177e4 LT |
1519 | break; |
1520 | ||
1521 | case USBDEVFS_URB_TYPE_BULK: | |
93cf9b90 | 1522 | switch (usb_endpoint_type(&ep->desc)) { |
1da177e4 LT |
1523 | case USB_ENDPOINT_XFER_CONTROL: |
1524 | case USB_ENDPOINT_XFER_ISOC: | |
1525 | return -EINVAL; | |
f661c6f8 AS |
1526 | case USB_ENDPOINT_XFER_INT: |
1527 | /* allow single-shot interrupt transfers */ | |
1528 | uurb->type = USBDEVFS_URB_TYPE_INTERRUPT; | |
1529 | goto interrupt_urb; | |
1da177e4 | 1530 | } |
3d97ff63 HG |
1531 | num_sgs = DIV_ROUND_UP(uurb->buffer_length, USB_SG_SIZE); |
1532 | if (num_sgs == 1 || num_sgs > ps->dev->bus->sg_tablesize) | |
1533 | num_sgs = 0; | |
948cd8c1 HG |
1534 | if (ep->streams) |
1535 | stream_id = uurb->stream_id; | |
1da177e4 LT |
1536 | break; |
1537 | ||
f661c6f8 AS |
1538 | case USBDEVFS_URB_TYPE_INTERRUPT: |
1539 | if (!usb_endpoint_xfer_int(&ep->desc)) | |
1540 | return -EINVAL; | |
1541 | interrupt_urb: | |
f661c6f8 AS |
1542 | break; |
1543 | ||
1da177e4 LT |
1544 | case USBDEVFS_URB_TYPE_ISO: |
1545 | /* arbitrary limit */ | |
04e482ff GKH |
1546 | if (uurb->number_of_packets < 1 || |
1547 | uurb->number_of_packets > 128) | |
1da177e4 | 1548 | return -EINVAL; |
93cf9b90 | 1549 | if (!usb_endpoint_xfer_isoc(&ep->desc)) |
1da177e4 | 1550 | return -EINVAL; |
b2d03eb5 | 1551 | number_of_packets = uurb->number_of_packets; |
04e482ff | 1552 | isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * |
b2d03eb5 | 1553 | number_of_packets; |
73a02d32 RP |
1554 | isopkt = memdup_user(iso_frame_desc, isofrmlen); |
1555 | if (IS_ERR(isopkt)) { | |
1556 | ret = PTR_ERR(isopkt); | |
1557 | isopkt = NULL; | |
52fb743d | 1558 | goto error; |
1da177e4 | 1559 | } |
b2d03eb5 | 1560 | for (totlen = u = 0; u < number_of_packets; u++) { |
e2e2f0ea FM |
1561 | /* |
1562 | * arbitrary limit need for USB 3.0 | |
1563 | * bMaxBurst (0~15 allowed, 1~16 packets) | |
1564 | * bmAttributes (bit 1:0, mult 0~2, 1~3 packets) | |
1565 | * sizemax: 1024 * 16 * 3 = 49152 | |
1566 | */ | |
1567 | if (isopkt[u].length > 49152) { | |
52fb743d AS |
1568 | ret = -EINVAL; |
1569 | goto error; | |
1da177e4 LT |
1570 | } |
1571 | totlen += isopkt[u].length; | |
1572 | } | |
add1aaea | 1573 | u *= sizeof(struct usb_iso_packet_descriptor); |
1da177e4 LT |
1574 | uurb->buffer_length = totlen; |
1575 | break; | |
1576 | ||
1da177e4 LT |
1577 | default: |
1578 | return -EINVAL; | |
1579 | } | |
add1aaea | 1580 | |
9180135b AS |
1581 | if (uurb->buffer_length > 0 && |
1582 | !access_ok(is_in ? VERIFY_WRITE : VERIFY_READ, | |
1583 | uurb->buffer, uurb->buffer_length)) { | |
52fb743d AS |
1584 | ret = -EFAULT; |
1585 | goto error; | |
1da177e4 | 1586 | } |
b2d03eb5 | 1587 | as = alloc_async(number_of_packets); |
9180135b | 1588 | if (!as) { |
52fb743d AS |
1589 | ret = -ENOMEM; |
1590 | goto error; | |
1da177e4 | 1591 | } |
3d97ff63 | 1592 | |
f7d34b44 SG |
1593 | as->usbm = find_memory_area(ps, uurb); |
1594 | if (IS_ERR(as->usbm)) { | |
1595 | ret = PTR_ERR(as->usbm); | |
1596 | as->usbm = NULL; | |
1597 | goto error; | |
1598 | } | |
1599 | ||
1600 | /* do not use SG buffers when memory mapped segments | |
1601 | * are in use | |
1602 | */ | |
1603 | if (as->usbm) | |
1604 | num_sgs = 0; | |
1605 | ||
3d97ff63 HG |
1606 | u += sizeof(struct async) + sizeof(struct urb) + uurb->buffer_length + |
1607 | num_sgs * sizeof(struct scatterlist); | |
add1aaea AS |
1608 | ret = usbfs_increase_memory_usage(u); |
1609 | if (ret) | |
1610 | goto error; | |
1611 | as->mem_usage = u; | |
1612 | ||
3d97ff63 HG |
1613 | if (num_sgs) { |
1614 | as->urb->sg = kmalloc(num_sgs * sizeof(struct scatterlist), | |
1615 | GFP_KERNEL); | |
1616 | if (!as->urb->sg) { | |
1617 | ret = -ENOMEM; | |
1618 | goto error; | |
1619 | } | |
1620 | as->urb->num_sgs = num_sgs; | |
1621 | sg_init_table(as->urb->sg, as->urb->num_sgs); | |
1622 | ||
1623 | totlen = uurb->buffer_length; | |
1624 | for (i = 0; i < as->urb->num_sgs; i++) { | |
1625 | u = (totlen > USB_SG_SIZE) ? USB_SG_SIZE : totlen; | |
1626 | buf = kmalloc(u, GFP_KERNEL); | |
1627 | if (!buf) { | |
1628 | ret = -ENOMEM; | |
1629 | goto error; | |
1630 | } | |
1631 | sg_set_buf(&as->urb->sg[i], buf, u); | |
1632 | ||
1633 | if (!is_in) { | |
1634 | if (copy_from_user(buf, uurb->buffer, u)) { | |
1635 | ret = -EFAULT; | |
1636 | goto error; | |
1637 | } | |
01463900 | 1638 | uurb->buffer += u; |
3d97ff63 HG |
1639 | } |
1640 | totlen -= u; | |
1641 | } | |
1642 | } else if (uurb->buffer_length > 0) { | |
f7d34b44 SG |
1643 | if (as->usbm) { |
1644 | unsigned long uurb_start = (unsigned long)uurb->buffer; | |
3d97ff63 | 1645 | |
f7d34b44 SG |
1646 | as->urb->transfer_buffer = as->usbm->mem + |
1647 | (uurb_start - as->usbm->vm_start); | |
1648 | } else { | |
1649 | as->urb->transfer_buffer = kmalloc(uurb->buffer_length, | |
1650 | GFP_KERNEL); | |
1651 | if (!as->urb->transfer_buffer) { | |
1652 | ret = -ENOMEM; | |
3d97ff63 HG |
1653 | goto error; |
1654 | } | |
f7d34b44 SG |
1655 | if (!is_in) { |
1656 | if (copy_from_user(as->urb->transfer_buffer, | |
1657 | uurb->buffer, | |
1658 | uurb->buffer_length)) { | |
1659 | ret = -EFAULT; | |
1660 | goto error; | |
1661 | } | |
1662 | } else if (uurb->type == USBDEVFS_URB_TYPE_ISO) { | |
1663 | /* | |
1664 | * Isochronous input data may end up being | |
1665 | * discontiguous if some of the packets are | |
1666 | * short. Clear the buffer so that the gaps | |
1667 | * don't leak kernel data to userspace. | |
1668 | */ | |
1669 | memset(as->urb->transfer_buffer, 0, | |
1670 | uurb->buffer_length); | |
1671 | } | |
3d97ff63 | 1672 | } |
9180135b | 1673 | } |
04e482ff GKH |
1674 | as->urb->dev = ps->dev; |
1675 | as->urb->pipe = (uurb->type << 30) | | |
93cf9b90 AS |
1676 | __create_pipe(ps->dev, uurb->endpoint & 0xf) | |
1677 | (uurb->endpoint & USB_DIR_IN); | |
14722ef4 AS |
1678 | |
1679 | /* This tedious sequence is necessary because the URB_* flags | |
1680 | * are internal to the kernel and subject to change, whereas | |
1681 | * the USBDEVFS_URB_* flags are a user API and must not be changed. | |
1682 | */ | |
1683 | u = (is_in ? URB_DIR_IN : URB_DIR_OUT); | |
1684 | if (uurb->flags & USBDEVFS_URB_ISO_ASAP) | |
1685 | u |= URB_ISO_ASAP; | |
d310d05f | 1686 | if (uurb->flags & USBDEVFS_URB_SHORT_NOT_OK && is_in) |
14722ef4 AS |
1687 | u |= URB_SHORT_NOT_OK; |
1688 | if (uurb->flags & USBDEVFS_URB_NO_FSBR) | |
1689 | u |= URB_NO_FSBR; | |
1690 | if (uurb->flags & USBDEVFS_URB_ZERO_PACKET) | |
1691 | u |= URB_ZERO_PACKET; | |
1692 | if (uurb->flags & USBDEVFS_URB_NO_INTERRUPT) | |
1693 | u |= URB_NO_INTERRUPT; | |
1694 | as->urb->transfer_flags = u; | |
1695 | ||
1da177e4 | 1696 | as->urb->transfer_buffer_length = uurb->buffer_length; |
04e482ff | 1697 | as->urb->setup_packet = (unsigned char *)dr; |
52fb743d | 1698 | dr = NULL; |
1da177e4 | 1699 | as->urb->start_frame = uurb->start_frame; |
b2d03eb5 | 1700 | as->urb->number_of_packets = number_of_packets; |
948cd8c1 | 1701 | as->urb->stream_id = stream_id; |
53e5f36f AS |
1702 | |
1703 | if (ep->desc.bInterval) { | |
1704 | if (uurb->type == USBDEVFS_URB_TYPE_ISO || | |
1705 | ps->dev->speed == USB_SPEED_HIGH || | |
1706 | ps->dev->speed >= USB_SPEED_SUPER) | |
1707 | as->urb->interval = 1 << | |
1708 | min(15, ep->desc.bInterval - 1); | |
1709 | else | |
1710 | as->urb->interval = ep->desc.bInterval; | |
1711 | } | |
1712 | ||
04e482ff GKH |
1713 | as->urb->context = as; |
1714 | as->urb->complete = async_completed; | |
b2d03eb5 | 1715 | for (totlen = u = 0; u < number_of_packets; u++) { |
1da177e4 LT |
1716 | as->urb->iso_frame_desc[u].offset = totlen; |
1717 | as->urb->iso_frame_desc[u].length = isopkt[u].length; | |
1718 | totlen += isopkt[u].length; | |
1719 | } | |
6fd19f4b | 1720 | kfree(isopkt); |
52fb743d | 1721 | isopkt = NULL; |
1da177e4 | 1722 | as->ps = ps; |
04e482ff | 1723 | as->userurb = arg; |
f7d34b44 SG |
1724 | if (as->usbm) { |
1725 | unsigned long uurb_start = (unsigned long)uurb->buffer; | |
1726 | ||
1727 | as->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
1728 | as->urb->transfer_dma = as->usbm->dma_handle + | |
1729 | (uurb_start - as->usbm->vm_start); | |
1730 | } else if (is_in && uurb->buffer_length > 0) | |
1da177e4 | 1731 | as->userbuffer = uurb->buffer; |
1da177e4 LT |
1732 | as->signr = uurb->signr; |
1733 | as->ifnum = ifnum; | |
2425c08b | 1734 | as->pid = get_pid(task_pid(current)); |
d178bc3a | 1735 | as->cred = get_current_cred(); |
7a01955f | 1736 | security_task_getsecid(current, &as->secid); |
4c6e8971 | 1737 | snoop_urb(ps->dev, as->userurb, as->urb->pipe, |
0880aef4 | 1738 | as->urb->transfer_buffer_length, 0, SUBMIT, |
3d97ff63 HG |
1739 | NULL, 0); |
1740 | if (!is_in) | |
1741 | snoop_urb_data(as->urb, as->urb->transfer_buffer_length); | |
1742 | ||
04e482ff | 1743 | async_newpending(as); |
01c6460f AS |
1744 | |
1745 | if (usb_endpoint_xfer_bulk(&ep->desc)) { | |
1746 | spin_lock_irq(&ps->lock); | |
1747 | ||
1748 | /* Not exactly the endpoint address; the direction bit is | |
1749 | * shifted to the 0x10 position so that the value will be | |
1750 | * between 0 and 31. | |
1751 | */ | |
1752 | as->bulk_addr = usb_endpoint_num(&ep->desc) | | |
1753 | ((ep->desc.bEndpointAddress & USB_ENDPOINT_DIR_MASK) | |
1754 | >> 3); | |
1755 | ||
1756 | /* If this bulk URB is the start of a new transfer, re-enable | |
1757 | * the endpoint. Otherwise mark it as a continuation URB. | |
1758 | */ | |
1759 | if (uurb->flags & USBDEVFS_URB_BULK_CONTINUATION) | |
1760 | as->bulk_status = AS_CONTINUATION; | |
1761 | else | |
1762 | ps->disabled_bulk_eps &= ~(1 << as->bulk_addr); | |
1763 | ||
1764 | /* Don't accept continuation URBs if the endpoint is | |
1765 | * disabled because of an earlier error. | |
1766 | */ | |
1767 | if (ps->disabled_bulk_eps & (1 << as->bulk_addr)) | |
1768 | ret = -EREMOTEIO; | |
1769 | else | |
1770 | ret = usb_submit_urb(as->urb, GFP_ATOMIC); | |
1771 | spin_unlock_irq(&ps->lock); | |
1772 | } else { | |
1773 | ret = usb_submit_urb(as->urb, GFP_KERNEL); | |
1774 | } | |
1775 | ||
1776 | if (ret) { | |
04e482ff GKH |
1777 | dev_printk(KERN_DEBUG, &ps->dev->dev, |
1778 | "usbfs: usb_submit_urb returned %d\n", ret); | |
4c6e8971 | 1779 | snoop_urb(ps->dev, as->userurb, as->urb->pipe, |
0880aef4 | 1780 | 0, ret, COMPLETE, NULL, 0); |
04e482ff | 1781 | async_removepending(as); |
52fb743d | 1782 | goto error; |
04e482ff GKH |
1783 | } |
1784 | return 0; | |
52fb743d AS |
1785 | |
1786 | error: | |
f7d34b44 SG |
1787 | if (as && as->usbm) |
1788 | dec_usb_memory_use_count(as->usbm, &as->usbm->urb_use_count); | |
52fb743d AS |
1789 | kfree(isopkt); |
1790 | kfree(dr); | |
1791 | if (as) | |
1792 | free_async(as); | |
1793 | return ret; | |
1da177e4 LT |
1794 | } |
1795 | ||
9b6f0c4b | 1796 | static int proc_submiturb(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
1797 | { |
1798 | struct usbdevfs_urb uurb; | |
1799 | ||
1800 | if (copy_from_user(&uurb, arg, sizeof(uurb))) | |
1801 | return -EFAULT; | |
1802 | ||
04e482ff GKH |
1803 | return proc_do_submiturb(ps, &uurb, |
1804 | (((struct usbdevfs_urb __user *)arg)->iso_frame_desc), | |
1805 | arg); | |
1da177e4 LT |
1806 | } |
1807 | ||
9b6f0c4b | 1808 | static int proc_unlinkurb(struct usb_dev_state *ps, void __user *arg) |
1da177e4 | 1809 | { |
4e09dcf2 | 1810 | struct urb *urb; |
1da177e4 | 1811 | struct async *as; |
4e09dcf2 | 1812 | unsigned long flags; |
1da177e4 | 1813 | |
4e09dcf2 | 1814 | spin_lock_irqsave(&ps->lock, flags); |
1da177e4 | 1815 | as = async_getpending(ps, arg); |
4e09dcf2 HL |
1816 | if (!as) { |
1817 | spin_unlock_irqrestore(&ps->lock, flags); | |
1da177e4 | 1818 | return -EINVAL; |
4e09dcf2 HL |
1819 | } |
1820 | ||
1821 | urb = as->urb; | |
1822 | usb_get_urb(urb); | |
1823 | spin_unlock_irqrestore(&ps->lock, flags); | |
1824 | ||
1825 | usb_kill_urb(urb); | |
1826 | usb_put_urb(urb); | |
1827 | ||
1da177e4 LT |
1828 | return 0; |
1829 | } | |
1830 | ||
1831 | static int processcompl(struct async *as, void __user * __user *arg) | |
1832 | { | |
1833 | struct urb *urb = as->urb; | |
1834 | struct usbdevfs_urb __user *userurb = as->userurb; | |
1835 | void __user *addr = as->userurb; | |
1836 | unsigned int i; | |
1837 | ||
7152b592 | 1838 | if (as->userbuffer && urb->actual_length) { |
3d97ff63 | 1839 | if (copy_urb_data_to_user(as->userbuffer, urb)) |
d794a021 | 1840 | goto err_out; |
7152b592 | 1841 | } |
e015268d | 1842 | if (put_user(as->status, &userurb->status)) |
d794a021 | 1843 | goto err_out; |
1da177e4 | 1844 | if (put_user(urb->actual_length, &userurb->actual_length)) |
d794a021 | 1845 | goto err_out; |
1da177e4 | 1846 | if (put_user(urb->error_count, &userurb->error_count)) |
d794a021 | 1847 | goto err_out; |
1da177e4 | 1848 | |
93cf9b90 | 1849 | if (usb_endpoint_xfer_isoc(&urb->ep->desc)) { |
668a9541 CL |
1850 | for (i = 0; i < urb->number_of_packets; i++) { |
1851 | if (put_user(urb->iso_frame_desc[i].actual_length, | |
1852 | &userurb->iso_frame_desc[i].actual_length)) | |
d794a021 | 1853 | goto err_out; |
668a9541 CL |
1854 | if (put_user(urb->iso_frame_desc[i].status, |
1855 | &userurb->iso_frame_desc[i].status)) | |
d794a021 | 1856 | goto err_out; |
668a9541 | 1857 | } |
1da177e4 LT |
1858 | } |
1859 | ||
1da177e4 LT |
1860 | if (put_user(addr, (void __user * __user *)arg)) |
1861 | return -EFAULT; | |
1862 | return 0; | |
d794a021 ON |
1863 | |
1864 | err_out: | |
d794a021 | 1865 | return -EFAULT; |
1da177e4 LT |
1866 | } |
1867 | ||
9b6f0c4b | 1868 | static struct async *reap_as(struct usb_dev_state *ps) |
1da177e4 | 1869 | { |
04e482ff | 1870 | DECLARE_WAITQUEUE(wait, current); |
1da177e4 LT |
1871 | struct async *as = NULL; |
1872 | struct usb_device *dev = ps->dev; | |
1873 | ||
1874 | add_wait_queue(&ps->wait, &wait); | |
1875 | for (;;) { | |
1876 | __set_current_state(TASK_INTERRUPTIBLE); | |
04e482ff | 1877 | as = async_getcompleted(ps); |
3f2cee73 | 1878 | if (as || !connected(ps)) |
1da177e4 LT |
1879 | break; |
1880 | if (signal_pending(current)) | |
1881 | break; | |
1882 | usb_unlock_device(dev); | |
1883 | schedule(); | |
1884 | usb_lock_device(dev); | |
1885 | } | |
1886 | remove_wait_queue(&ps->wait, &wait); | |
1887 | set_current_state(TASK_RUNNING); | |
1888 | return as; | |
1889 | } | |
1890 | ||
9b6f0c4b | 1891 | static int proc_reapurb(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
1892 | { |
1893 | struct async *as = reap_as(ps); | |
a016a816 | 1894 | |
ddeee0b2 | 1895 | if (as) { |
a016a816 AS |
1896 | int retval; |
1897 | ||
1898 | snoop(&ps->dev->dev, "reap %p\n", as->userurb); | |
1899 | retval = processcompl(as, (void __user * __user *)arg); | |
ddeee0b2 LT |
1900 | free_async(as); |
1901 | return retval; | |
1902 | } | |
1da177e4 LT |
1903 | if (signal_pending(current)) |
1904 | return -EINTR; | |
3f2cee73 | 1905 | return -ENODEV; |
1da177e4 LT |
1906 | } |
1907 | ||
9b6f0c4b | 1908 | static int proc_reapurbnonblock(struct usb_dev_state *ps, void __user *arg) |
1da177e4 | 1909 | { |
ddeee0b2 | 1910 | int retval; |
1da177e4 LT |
1911 | struct async *as; |
1912 | ||
ddeee0b2 | 1913 | as = async_getcompleted(ps); |
ddeee0b2 | 1914 | if (as) { |
a016a816 | 1915 | snoop(&ps->dev->dev, "reap %p\n", as->userurb); |
ddeee0b2 LT |
1916 | retval = processcompl(as, (void __user * __user *)arg); |
1917 | free_async(as); | |
3f2cee73 AS |
1918 | } else { |
1919 | retval = (connected(ps) ? -EAGAIN : -ENODEV); | |
ddeee0b2 LT |
1920 | } |
1921 | return retval; | |
1da177e4 LT |
1922 | } |
1923 | ||
1924 | #ifdef CONFIG_COMPAT | |
9b6f0c4b | 1925 | static int proc_control_compat(struct usb_dev_state *ps, |
637e8a60 AB |
1926 | struct usbdevfs_ctrltransfer32 __user *p32) |
1927 | { | |
5b32c385 MB |
1928 | struct usbdevfs_ctrltransfer __user *p; |
1929 | __u32 udata; | |
1930 | p = compat_alloc_user_space(sizeof(*p)); | |
1931 | if (copy_in_user(p, p32, (sizeof(*p32) - sizeof(compat_caddr_t))) || | |
1932 | get_user(udata, &p32->data) || | |
637e8a60 AB |
1933 | put_user(compat_ptr(udata), &p->data)) |
1934 | return -EFAULT; | |
5b32c385 | 1935 | return proc_control(ps, p); |
637e8a60 AB |
1936 | } |
1937 | ||
9b6f0c4b | 1938 | static int proc_bulk_compat(struct usb_dev_state *ps, |
637e8a60 AB |
1939 | struct usbdevfs_bulktransfer32 __user *p32) |
1940 | { | |
06793f2d MB |
1941 | struct usbdevfs_bulktransfer __user *p; |
1942 | compat_uint_t n; | |
1943 | compat_caddr_t addr; | |
637e8a60 | 1944 | |
06793f2d | 1945 | p = compat_alloc_user_space(sizeof(*p)); |
637e8a60 | 1946 | |
06793f2d MB |
1947 | if (get_user(n, &p32->ep) || put_user(n, &p->ep) || |
1948 | get_user(n, &p32->len) || put_user(n, &p->len) || | |
1949 | get_user(n, &p32->timeout) || put_user(n, &p->timeout) || | |
1950 | get_user(addr, &p32->data) || put_user(compat_ptr(addr), &p->data)) | |
1951 | return -EFAULT; | |
637e8a60 | 1952 | |
06793f2d | 1953 | return proc_bulk(ps, p); |
637e8a60 | 1954 | } |
9b6f0c4b | 1955 | static int proc_disconnectsignal_compat(struct usb_dev_state *ps, void __user *arg) |
637e8a60 AB |
1956 | { |
1957 | struct usbdevfs_disconnectsignal32 ds; | |
1958 | ||
1959 | if (copy_from_user(&ds, arg, sizeof(ds))) | |
1960 | return -EFAULT; | |
1961 | ps->discsignr = ds.signr; | |
1962 | ps->disccontext = compat_ptr(ds.context); | |
1963 | return 0; | |
1964 | } | |
1da177e4 LT |
1965 | |
1966 | static int get_urb32(struct usbdevfs_urb *kurb, | |
1967 | struct usbdevfs_urb32 __user *uurb) | |
1968 | { | |
1969 | __u32 uptr; | |
18753ebc MB |
1970 | if (!access_ok(VERIFY_READ, uurb, sizeof(*uurb)) || |
1971 | __get_user(kurb->type, &uurb->type) || | |
1da177e4 LT |
1972 | __get_user(kurb->endpoint, &uurb->endpoint) || |
1973 | __get_user(kurb->status, &uurb->status) || | |
1974 | __get_user(kurb->flags, &uurb->flags) || | |
1975 | __get_user(kurb->buffer_length, &uurb->buffer_length) || | |
1976 | __get_user(kurb->actual_length, &uurb->actual_length) || | |
1977 | __get_user(kurb->start_frame, &uurb->start_frame) || | |
1978 | __get_user(kurb->number_of_packets, &uurb->number_of_packets) || | |
1979 | __get_user(kurb->error_count, &uurb->error_count) || | |
1980 | __get_user(kurb->signr, &uurb->signr)) | |
1981 | return -EFAULT; | |
1982 | ||
1983 | if (__get_user(uptr, &uurb->buffer)) | |
1984 | return -EFAULT; | |
1985 | kurb->buffer = compat_ptr(uptr); | |
ed0c7720 | 1986 | if (__get_user(uptr, &uurb->usercontext)) |
1da177e4 LT |
1987 | return -EFAULT; |
1988 | kurb->usercontext = compat_ptr(uptr); | |
1989 | ||
1990 | return 0; | |
1991 | } | |
1992 | ||
9b6f0c4b | 1993 | static int proc_submiturb_compat(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
1994 | { |
1995 | struct usbdevfs_urb uurb; | |
1996 | ||
04e482ff | 1997 | if (get_urb32(&uurb, (struct usbdevfs_urb32 __user *)arg)) |
1da177e4 LT |
1998 | return -EFAULT; |
1999 | ||
04e482ff GKH |
2000 | return proc_do_submiturb(ps, &uurb, |
2001 | ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc, | |
2002 | arg); | |
1da177e4 LT |
2003 | } |
2004 | ||
2005 | static int processcompl_compat(struct async *as, void __user * __user *arg) | |
2006 | { | |
2007 | struct urb *urb = as->urb; | |
2008 | struct usbdevfs_urb32 __user *userurb = as->userurb; | |
2009 | void __user *addr = as->userurb; | |
2010 | unsigned int i; | |
2011 | ||
2102e06a | 2012 | if (as->userbuffer && urb->actual_length) { |
3d97ff63 | 2013 | if (copy_urb_data_to_user(as->userbuffer, urb)) |
1da177e4 | 2014 | return -EFAULT; |
2102e06a | 2015 | } |
e015268d | 2016 | if (put_user(as->status, &userurb->status)) |
1da177e4 LT |
2017 | return -EFAULT; |
2018 | if (put_user(urb->actual_length, &userurb->actual_length)) | |
2019 | return -EFAULT; | |
2020 | if (put_user(urb->error_count, &userurb->error_count)) | |
2021 | return -EFAULT; | |
2022 | ||
93cf9b90 | 2023 | if (usb_endpoint_xfer_isoc(&urb->ep->desc)) { |
668a9541 CL |
2024 | for (i = 0; i < urb->number_of_packets; i++) { |
2025 | if (put_user(urb->iso_frame_desc[i].actual_length, | |
2026 | &userurb->iso_frame_desc[i].actual_length)) | |
2027 | return -EFAULT; | |
2028 | if (put_user(urb->iso_frame_desc[i].status, | |
2029 | &userurb->iso_frame_desc[i].status)) | |
2030 | return -EFAULT; | |
2031 | } | |
1da177e4 LT |
2032 | } |
2033 | ||
c714de5d | 2034 | if (put_user(ptr_to_compat(addr), (u32 __user *)arg)) |
1da177e4 LT |
2035 | return -EFAULT; |
2036 | return 0; | |
2037 | } | |
2038 | ||
9b6f0c4b | 2039 | static int proc_reapurb_compat(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
2040 | { |
2041 | struct async *as = reap_as(ps); | |
a016a816 | 2042 | |
ddeee0b2 | 2043 | if (as) { |
a016a816 AS |
2044 | int retval; |
2045 | ||
2046 | snoop(&ps->dev->dev, "reap %p\n", as->userurb); | |
2047 | retval = processcompl_compat(as, (void __user * __user *)arg); | |
ddeee0b2 LT |
2048 | free_async(as); |
2049 | return retval; | |
2050 | } | |
1da177e4 LT |
2051 | if (signal_pending(current)) |
2052 | return -EINTR; | |
3f2cee73 | 2053 | return -ENODEV; |
1da177e4 LT |
2054 | } |
2055 | ||
9b6f0c4b | 2056 | static int proc_reapurbnonblock_compat(struct usb_dev_state *ps, void __user *arg) |
1da177e4 | 2057 | { |
ddeee0b2 | 2058 | int retval; |
1da177e4 LT |
2059 | struct async *as; |
2060 | ||
ddeee0b2 LT |
2061 | as = async_getcompleted(ps); |
2062 | if (as) { | |
a016a816 | 2063 | snoop(&ps->dev->dev, "reap %p\n", as->userurb); |
ddeee0b2 LT |
2064 | retval = processcompl_compat(as, (void __user * __user *)arg); |
2065 | free_async(as); | |
3f2cee73 AS |
2066 | } else { |
2067 | retval = (connected(ps) ? -EAGAIN : -ENODEV); | |
ddeee0b2 LT |
2068 | } |
2069 | return retval; | |
1da177e4 LT |
2070 | } |
2071 | ||
637e8a60 | 2072 | |
1da177e4 LT |
2073 | #endif |
2074 | ||
9b6f0c4b | 2075 | static int proc_disconnectsignal(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
2076 | { |
2077 | struct usbdevfs_disconnectsignal ds; | |
2078 | ||
2079 | if (copy_from_user(&ds, arg, sizeof(ds))) | |
2080 | return -EFAULT; | |
1da177e4 LT |
2081 | ps->discsignr = ds.signr; |
2082 | ps->disccontext = ds.context; | |
2083 | return 0; | |
2084 | } | |
2085 | ||
9b6f0c4b | 2086 | static int proc_claiminterface(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
2087 | { |
2088 | unsigned int ifnum; | |
2089 | ||
2090 | if (get_user(ifnum, (unsigned int __user *)arg)) | |
2091 | return -EFAULT; | |
2092 | return claimintf(ps, ifnum); | |
2093 | } | |
2094 | ||
9b6f0c4b | 2095 | static int proc_releaseinterface(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
2096 | { |
2097 | unsigned int ifnum; | |
2098 | int ret; | |
2099 | ||
2100 | if (get_user(ifnum, (unsigned int __user *)arg)) | |
2101 | return -EFAULT; | |
135551ea KB |
2102 | ret = releaseintf(ps, ifnum); |
2103 | if (ret < 0) | |
1da177e4 | 2104 | return ret; |
64f10edf | 2105 | destroy_async_on_interface(ps, ifnum); |
1da177e4 LT |
2106 | return 0; |
2107 | } | |
2108 | ||
9b6f0c4b | 2109 | static int proc_ioctl(struct usb_dev_state *ps, struct usbdevfs_ioctl *ctl) |
1da177e4 | 2110 | { |
1da177e4 LT |
2111 | int size; |
2112 | void *buf = NULL; | |
2113 | int retval = 0; | |
2114 | struct usb_interface *intf = NULL; | |
2115 | struct usb_driver *driver = NULL; | |
1da177e4 | 2116 | |
d883f52e RG |
2117 | if (ps->privileges_dropped) |
2118 | return -EACCES; | |
2119 | ||
c36fc889 | 2120 | /* alloc buffer */ |
135551ea KB |
2121 | size = _IOC_SIZE(ctl->ioctl_code); |
2122 | if (size > 0) { | |
4baf0df7 Tİ |
2123 | buf = kmalloc(size, GFP_KERNEL); |
2124 | if (buf == NULL) | |
1da177e4 | 2125 | return -ENOMEM; |
c36fc889 | 2126 | if ((_IOC_DIR(ctl->ioctl_code) & _IOC_WRITE)) { |
04e482ff | 2127 | if (copy_from_user(buf, ctl->data, size)) { |
6fd19f4b | 2128 | kfree(buf); |
1da177e4 LT |
2129 | return -EFAULT; |
2130 | } | |
2131 | } else { | |
04e482ff | 2132 | memset(buf, 0, size); |
1da177e4 LT |
2133 | } |
2134 | } | |
2135 | ||
349710c3 | 2136 | if (!connected(ps)) { |
6fd19f4b | 2137 | kfree(buf); |
1da177e4 LT |
2138 | return -ENODEV; |
2139 | } | |
2140 | ||
2141 | if (ps->dev->state != USB_STATE_CONFIGURED) | |
2142 | retval = -EHOSTUNREACH; | |
04e482ff GKH |
2143 | else if (!(intf = usb_ifnum_to_if(ps->dev, ctl->ifno))) |
2144 | retval = -EINVAL; | |
c36fc889 | 2145 | else switch (ctl->ioctl_code) { |
1da177e4 LT |
2146 | |
2147 | /* disconnect kernel driver from interface */ | |
2148 | case USBDEVFS_DISCONNECT: | |
1da177e4 LT |
2149 | if (intf->dev.driver) { |
2150 | driver = to_usb_driver(intf->dev.driver); | |
04e482ff | 2151 | dev_dbg(&intf->dev, "disconnect by usbfs\n"); |
1da177e4 LT |
2152 | usb_driver_release_interface(driver, intf); |
2153 | } else | |
2154 | retval = -ENODATA; | |
1da177e4 LT |
2155 | break; |
2156 | ||
2157 | /* let kernel drivers try to (re)bind to the interface */ | |
2158 | case USBDEVFS_CONNECT: | |
885e9747 AS |
2159 | if (!intf->dev.driver) |
2160 | retval = device_attach(&intf->dev); | |
2161 | else | |
2162 | retval = -EBUSY; | |
1da177e4 LT |
2163 | break; |
2164 | ||
2165 | /* talk directly to the interface's driver */ | |
2166 | default: | |
1da177e4 LT |
2167 | if (intf->dev.driver) |
2168 | driver = to_usb_driver(intf->dev.driver); | |
c532b29a | 2169 | if (driver == NULL || driver->unlocked_ioctl == NULL) { |
1da177e4 LT |
2170 | retval = -ENOTTY; |
2171 | } else { | |
c532b29a | 2172 | retval = driver->unlocked_ioctl(intf, ctl->ioctl_code, buf); |
1da177e4 LT |
2173 | if (retval == -ENOIOCTLCMD) |
2174 | retval = -ENOTTY; | |
2175 | } | |
1da177e4 LT |
2176 | } |
2177 | ||
2178 | /* cleanup and return */ | |
2179 | if (retval >= 0 | |
04e482ff | 2180 | && (_IOC_DIR(ctl->ioctl_code) & _IOC_READ) != 0 |
1da177e4 | 2181 | && size > 0 |
04e482ff | 2182 | && copy_to_user(ctl->data, buf, size) != 0) |
1da177e4 | 2183 | retval = -EFAULT; |
6fd19f4b JJ |
2184 | |
2185 | kfree(buf); | |
1da177e4 LT |
2186 | return retval; |
2187 | } | |
2188 | ||
9b6f0c4b | 2189 | static int proc_ioctl_default(struct usb_dev_state *ps, void __user *arg) |
c36fc889 PZ |
2190 | { |
2191 | struct usbdevfs_ioctl ctrl; | |
2192 | ||
04e482ff | 2193 | if (copy_from_user(&ctrl, arg, sizeof(ctrl))) |
c36fc889 PZ |
2194 | return -EFAULT; |
2195 | return proc_ioctl(ps, &ctrl); | |
2196 | } | |
2197 | ||
2198 | #ifdef CONFIG_COMPAT | |
9b6f0c4b | 2199 | static int proc_ioctl_compat(struct usb_dev_state *ps, compat_uptr_t arg) |
c36fc889 PZ |
2200 | { |
2201 | struct usbdevfs_ioctl32 __user *uioc; | |
2202 | struct usbdevfs_ioctl ctrl; | |
2203 | u32 udata; | |
2204 | ||
058120d7 | 2205 | uioc = compat_ptr((long)arg); |
18753ebc MB |
2206 | if (!access_ok(VERIFY_READ, uioc, sizeof(*uioc)) || |
2207 | __get_user(ctrl.ifno, &uioc->ifno) || | |
2208 | __get_user(ctrl.ioctl_code, &uioc->ioctl_code) || | |
c36fc889 PZ |
2209 | __get_user(udata, &uioc->data)) |
2210 | return -EFAULT; | |
2211 | ctrl.data = compat_ptr(udata); | |
2212 | ||
2213 | return proc_ioctl(ps, &ctrl); | |
2214 | } | |
2215 | #endif | |
2216 | ||
9b6f0c4b | 2217 | static int proc_claim_port(struct usb_dev_state *ps, void __user *arg) |
7cbe5dca AS |
2218 | { |
2219 | unsigned portnum; | |
2220 | int rc; | |
2221 | ||
2222 | if (get_user(portnum, (unsigned __user *) arg)) | |
2223 | return -EFAULT; | |
2224 | rc = usb_hub_claim_port(ps->dev, portnum, ps); | |
2225 | if (rc == 0) | |
2226 | snoop(&ps->dev->dev, "port %d claimed by process %d: %s\n", | |
2227 | portnum, task_pid_nr(current), current->comm); | |
2228 | return rc; | |
2229 | } | |
2230 | ||
9b6f0c4b | 2231 | static int proc_release_port(struct usb_dev_state *ps, void __user *arg) |
7cbe5dca AS |
2232 | { |
2233 | unsigned portnum; | |
2234 | ||
2235 | if (get_user(portnum, (unsigned __user *) arg)) | |
2236 | return -EFAULT; | |
2237 | return usb_hub_release_port(ps->dev, portnum, ps); | |
2238 | } | |
2239 | ||
9b6f0c4b | 2240 | static int proc_get_capabilities(struct usb_dev_state *ps, void __user *arg) |
19181bc5 HG |
2241 | { |
2242 | __u32 caps; | |
2243 | ||
3f2cee73 | 2244 | caps = USBDEVFS_CAP_ZERO_PACKET | USBDEVFS_CAP_NO_PACKET_SIZE_LIM | |
d883f52e RG |
2245 | USBDEVFS_CAP_REAP_AFTER_DISCONNECT | USBDEVFS_CAP_MMAP | |
2246 | USBDEVFS_CAP_DROP_PRIVILEGES; | |
19181bc5 HG |
2247 | if (!ps->dev->bus->no_stop_on_short) |
2248 | caps |= USBDEVFS_CAP_BULK_CONTINUATION; | |
3d97ff63 HG |
2249 | if (ps->dev->bus->sg_tablesize) |
2250 | caps |= USBDEVFS_CAP_BULK_SCATTER_GATHER; | |
19181bc5 HG |
2251 | |
2252 | if (put_user(caps, (__u32 __user *)arg)) | |
2253 | return -EFAULT; | |
2254 | ||
2255 | return 0; | |
2256 | } | |
2257 | ||
9b6f0c4b | 2258 | static int proc_disconnect_claim(struct usb_dev_state *ps, void __user *arg) |
0837e7e5 HG |
2259 | { |
2260 | struct usbdevfs_disconnect_claim dc; | |
2261 | struct usb_interface *intf; | |
2262 | ||
2263 | if (copy_from_user(&dc, arg, sizeof(dc))) | |
2264 | return -EFAULT; | |
2265 | ||
2266 | intf = usb_ifnum_to_if(ps->dev, dc.interface); | |
2267 | if (!intf) | |
2268 | return -EINVAL; | |
2269 | ||
2270 | if (intf->dev.driver) { | |
2271 | struct usb_driver *driver = to_usb_driver(intf->dev.driver); | |
2272 | ||
d883f52e RG |
2273 | if (ps->privileges_dropped) |
2274 | return -EACCES; | |
2275 | ||
0837e7e5 HG |
2276 | if ((dc.flags & USBDEVFS_DISCONNECT_CLAIM_IF_DRIVER) && |
2277 | strncmp(dc.driver, intf->dev.driver->name, | |
2278 | sizeof(dc.driver)) != 0) | |
2279 | return -EBUSY; | |
2280 | ||
2281 | if ((dc.flags & USBDEVFS_DISCONNECT_CLAIM_EXCEPT_DRIVER) && | |
2282 | strncmp(dc.driver, intf->dev.driver->name, | |
2283 | sizeof(dc.driver)) == 0) | |
2284 | return -EBUSY; | |
2285 | ||
2286 | dev_dbg(&intf->dev, "disconnect by usbfs\n"); | |
2287 | usb_driver_release_interface(driver, intf); | |
2288 | } | |
2289 | ||
2290 | return claimintf(ps, dc.interface); | |
2291 | } | |
2292 | ||
3e75c6de | 2293 | static int proc_alloc_streams(struct usb_dev_state *ps, void __user *arg) |
bcf7f6e3 HG |
2294 | { |
2295 | unsigned num_streams, num_eps; | |
2296 | struct usb_host_endpoint **eps; | |
2297 | struct usb_interface *intf; | |
2298 | int r; | |
2299 | ||
2300 | r = parse_usbdevfs_streams(ps, arg, &num_streams, &num_eps, | |
2301 | &eps, &intf); | |
2302 | if (r) | |
2303 | return r; | |
2304 | ||
2305 | destroy_async_on_interface(ps, | |
2306 | intf->altsetting[0].desc.bInterfaceNumber); | |
2307 | ||
2308 | r = usb_alloc_streams(intf, eps, num_eps, num_streams, GFP_KERNEL); | |
2309 | kfree(eps); | |
2310 | return r; | |
2311 | } | |
2312 | ||
3e75c6de | 2313 | static int proc_free_streams(struct usb_dev_state *ps, void __user *arg) |
bcf7f6e3 HG |
2314 | { |
2315 | unsigned num_eps; | |
2316 | struct usb_host_endpoint **eps; | |
2317 | struct usb_interface *intf; | |
2318 | int r; | |
2319 | ||
2320 | r = parse_usbdevfs_streams(ps, arg, NULL, &num_eps, &eps, &intf); | |
2321 | if (r) | |
2322 | return r; | |
2323 | ||
2324 | destroy_async_on_interface(ps, | |
2325 | intf->altsetting[0].desc.bInterfaceNumber); | |
2326 | ||
2327 | r = usb_free_streams(intf, eps, num_eps, GFP_KERNEL); | |
2328 | kfree(eps); | |
2329 | return r; | |
2330 | } | |
2331 | ||
d883f52e RG |
2332 | static int proc_drop_privileges(struct usb_dev_state *ps, void __user *arg) |
2333 | { | |
2334 | u32 data; | |
2335 | ||
2336 | if (copy_from_user(&data, arg, sizeof(data))) | |
2337 | return -EFAULT; | |
2338 | ||
0f5e1558 | 2339 | /* This is a one way operation. Once privileges are |
d883f52e RG |
2340 | * dropped, you cannot regain them. You may however reissue |
2341 | * this ioctl to shrink the allowed interfaces mask. | |
2342 | */ | |
2343 | ps->interface_allowed_mask &= data; | |
2344 | ps->privileges_dropped = true; | |
2345 | ||
2346 | return 0; | |
2347 | } | |
2348 | ||
1da177e4 LT |
2349 | /* |
2350 | * NOTE: All requests here that have interface numbers as parameters | |
2351 | * are assuming that somehow the configuration has been prevented from | |
2352 | * changing. But there's no mechanism to ensure that... | |
2353 | */ | |
637e8a60 AB |
2354 | static long usbdev_do_ioctl(struct file *file, unsigned int cmd, |
2355 | void __user *p) | |
1da177e4 | 2356 | { |
9b6f0c4b | 2357 | struct usb_dev_state *ps = file->private_data; |
496ad9aa | 2358 | struct inode *inode = file_inode(file); |
1da177e4 | 2359 | struct usb_device *dev = ps->dev; |
1da177e4 LT |
2360 | int ret = -ENOTTY; |
2361 | ||
2362 | if (!(file->f_mode & FMODE_WRITE)) | |
2363 | return -EPERM; | |
01412a21 | 2364 | |
1da177e4 | 2365 | usb_lock_device(dev); |
3f2cee73 AS |
2366 | |
2367 | /* Reap operations are allowed even after disconnection */ | |
2368 | switch (cmd) { | |
2369 | case USBDEVFS_REAPURB: | |
2370 | snoop(&dev->dev, "%s: REAPURB\n", __func__); | |
2371 | ret = proc_reapurb(ps, p); | |
2372 | goto done; | |
2373 | ||
2374 | case USBDEVFS_REAPURBNDELAY: | |
2375 | snoop(&dev->dev, "%s: REAPURBNDELAY\n", __func__); | |
2376 | ret = proc_reapurbnonblock(ps, p); | |
2377 | goto done; | |
2378 | ||
2379 | #ifdef CONFIG_COMPAT | |
2380 | case USBDEVFS_REAPURB32: | |
2381 | snoop(&dev->dev, "%s: REAPURB32\n", __func__); | |
2382 | ret = proc_reapurb_compat(ps, p); | |
2383 | goto done; | |
2384 | ||
2385 | case USBDEVFS_REAPURBNDELAY32: | |
2386 | snoop(&dev->dev, "%s: REAPURBNDELAY32\n", __func__); | |
2387 | ret = proc_reapurbnonblock_compat(ps, p); | |
2388 | goto done; | |
2389 | #endif | |
2390 | } | |
2391 | ||
349710c3 | 2392 | if (!connected(ps)) { |
1da177e4 LT |
2393 | usb_unlock_device(dev); |
2394 | return -ENODEV; | |
2395 | } | |
2396 | ||
2397 | switch (cmd) { | |
2398 | case USBDEVFS_CONTROL: | |
441b62c1 | 2399 | snoop(&dev->dev, "%s: CONTROL\n", __func__); |
1da177e4 LT |
2400 | ret = proc_control(ps, p); |
2401 | if (ret >= 0) | |
078cd827 | 2402 | inode->i_mtime = current_time(inode); |
1da177e4 LT |
2403 | break; |
2404 | ||
2405 | case USBDEVFS_BULK: | |
441b62c1 | 2406 | snoop(&dev->dev, "%s: BULK\n", __func__); |
1da177e4 LT |
2407 | ret = proc_bulk(ps, p); |
2408 | if (ret >= 0) | |
078cd827 | 2409 | inode->i_mtime = current_time(inode); |
1da177e4 LT |
2410 | break; |
2411 | ||
2412 | case USBDEVFS_RESETEP: | |
441b62c1 | 2413 | snoop(&dev->dev, "%s: RESETEP\n", __func__); |
1da177e4 LT |
2414 | ret = proc_resetep(ps, p); |
2415 | if (ret >= 0) | |
078cd827 | 2416 | inode->i_mtime = current_time(inode); |
1da177e4 LT |
2417 | break; |
2418 | ||
2419 | case USBDEVFS_RESET: | |
441b62c1 | 2420 | snoop(&dev->dev, "%s: RESET\n", __func__); |
1da177e4 LT |
2421 | ret = proc_resetdevice(ps); |
2422 | break; | |
2423 | ||
2424 | case USBDEVFS_CLEAR_HALT: | |
441b62c1 | 2425 | snoop(&dev->dev, "%s: CLEAR_HALT\n", __func__); |
1da177e4 LT |
2426 | ret = proc_clearhalt(ps, p); |
2427 | if (ret >= 0) | |
078cd827 | 2428 | inode->i_mtime = current_time(inode); |
1da177e4 LT |
2429 | break; |
2430 | ||
2431 | case USBDEVFS_GETDRIVER: | |
441b62c1 | 2432 | snoop(&dev->dev, "%s: GETDRIVER\n", __func__); |
1da177e4 LT |
2433 | ret = proc_getdriver(ps, p); |
2434 | break; | |
2435 | ||
2436 | case USBDEVFS_CONNECTINFO: | |
441b62c1 | 2437 | snoop(&dev->dev, "%s: CONNECTINFO\n", __func__); |
1da177e4 LT |
2438 | ret = proc_connectinfo(ps, p); |
2439 | break; | |
2440 | ||
2441 | case USBDEVFS_SETINTERFACE: | |
441b62c1 | 2442 | snoop(&dev->dev, "%s: SETINTERFACE\n", __func__); |
1da177e4 LT |
2443 | ret = proc_setintf(ps, p); |
2444 | break; | |
2445 | ||
2446 | case USBDEVFS_SETCONFIGURATION: | |
441b62c1 | 2447 | snoop(&dev->dev, "%s: SETCONFIGURATION\n", __func__); |
1da177e4 LT |
2448 | ret = proc_setconfig(ps, p); |
2449 | break; | |
2450 | ||
2451 | case USBDEVFS_SUBMITURB: | |
441b62c1 | 2452 | snoop(&dev->dev, "%s: SUBMITURB\n", __func__); |
1da177e4 LT |
2453 | ret = proc_submiturb(ps, p); |
2454 | if (ret >= 0) | |
078cd827 | 2455 | inode->i_mtime = current_time(inode); |
1da177e4 LT |
2456 | break; |
2457 | ||
2458 | #ifdef CONFIG_COMPAT | |
637e8a60 AB |
2459 | case USBDEVFS_CONTROL32: |
2460 | snoop(&dev->dev, "%s: CONTROL32\n", __func__); | |
2461 | ret = proc_control_compat(ps, p); | |
2462 | if (ret >= 0) | |
078cd827 | 2463 | inode->i_mtime = current_time(inode); |
637e8a60 AB |
2464 | break; |
2465 | ||
2466 | case USBDEVFS_BULK32: | |
2467 | snoop(&dev->dev, "%s: BULK32\n", __func__); | |
2468 | ret = proc_bulk_compat(ps, p); | |
2469 | if (ret >= 0) | |
078cd827 | 2470 | inode->i_mtime = current_time(inode); |
637e8a60 AB |
2471 | break; |
2472 | ||
2473 | case USBDEVFS_DISCSIGNAL32: | |
2474 | snoop(&dev->dev, "%s: DISCSIGNAL32\n", __func__); | |
2475 | ret = proc_disconnectsignal_compat(ps, p); | |
2476 | break; | |
1da177e4 LT |
2477 | |
2478 | case USBDEVFS_SUBMITURB32: | |
441b62c1 | 2479 | snoop(&dev->dev, "%s: SUBMITURB32\n", __func__); |
1da177e4 LT |
2480 | ret = proc_submiturb_compat(ps, p); |
2481 | if (ret >= 0) | |
078cd827 | 2482 | inode->i_mtime = current_time(inode); |
1da177e4 LT |
2483 | break; |
2484 | ||
c36fc889 | 2485 | case USBDEVFS_IOCTL32: |
637e8a60 | 2486 | snoop(&dev->dev, "%s: IOCTL32\n", __func__); |
c714de5d | 2487 | ret = proc_ioctl_compat(ps, ptr_to_compat(p)); |
c36fc889 | 2488 | break; |
1da177e4 LT |
2489 | #endif |
2490 | ||
2491 | case USBDEVFS_DISCARDURB: | |
a016a816 | 2492 | snoop(&dev->dev, "%s: DISCARDURB %p\n", __func__, p); |
1da177e4 LT |
2493 | ret = proc_unlinkurb(ps, p); |
2494 | break; | |
2495 | ||
1da177e4 | 2496 | case USBDEVFS_DISCSIGNAL: |
441b62c1 | 2497 | snoop(&dev->dev, "%s: DISCSIGNAL\n", __func__); |
1da177e4 LT |
2498 | ret = proc_disconnectsignal(ps, p); |
2499 | break; | |
2500 | ||
2501 | case USBDEVFS_CLAIMINTERFACE: | |
441b62c1 | 2502 | snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __func__); |
1da177e4 LT |
2503 | ret = proc_claiminterface(ps, p); |
2504 | break; | |
2505 | ||
2506 | case USBDEVFS_RELEASEINTERFACE: | |
441b62c1 | 2507 | snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __func__); |
1da177e4 LT |
2508 | ret = proc_releaseinterface(ps, p); |
2509 | break; | |
2510 | ||
2511 | case USBDEVFS_IOCTL: | |
441b62c1 | 2512 | snoop(&dev->dev, "%s: IOCTL\n", __func__); |
c36fc889 | 2513 | ret = proc_ioctl_default(ps, p); |
1da177e4 | 2514 | break; |
7cbe5dca AS |
2515 | |
2516 | case USBDEVFS_CLAIM_PORT: | |
2517 | snoop(&dev->dev, "%s: CLAIM_PORT\n", __func__); | |
2518 | ret = proc_claim_port(ps, p); | |
2519 | break; | |
2520 | ||
2521 | case USBDEVFS_RELEASE_PORT: | |
2522 | snoop(&dev->dev, "%s: RELEASE_PORT\n", __func__); | |
2523 | ret = proc_release_port(ps, p); | |
2524 | break; | |
19181bc5 HG |
2525 | case USBDEVFS_GET_CAPABILITIES: |
2526 | ret = proc_get_capabilities(ps, p); | |
2527 | break; | |
0837e7e5 HG |
2528 | case USBDEVFS_DISCONNECT_CLAIM: |
2529 | ret = proc_disconnect_claim(ps, p); | |
2530 | break; | |
bcf7f6e3 HG |
2531 | case USBDEVFS_ALLOC_STREAMS: |
2532 | ret = proc_alloc_streams(ps, p); | |
2533 | break; | |
2534 | case USBDEVFS_FREE_STREAMS: | |
2535 | ret = proc_free_streams(ps, p); | |
2536 | break; | |
d883f52e RG |
2537 | case USBDEVFS_DROP_PRIVILEGES: |
2538 | ret = proc_drop_privileges(ps, p); | |
2539 | break; | |
1da177e4 | 2540 | } |
3f2cee73 AS |
2541 | |
2542 | done: | |
1da177e4 LT |
2543 | usb_unlock_device(dev); |
2544 | if (ret >= 0) | |
078cd827 | 2545 | inode->i_atime = current_time(inode); |
1da177e4 LT |
2546 | return ret; |
2547 | } | |
2548 | ||
637e8a60 AB |
2549 | static long usbdev_ioctl(struct file *file, unsigned int cmd, |
2550 | unsigned long arg) | |
2551 | { | |
2552 | int ret; | |
2553 | ||
637e8a60 | 2554 | ret = usbdev_do_ioctl(file, cmd, (void __user *)arg); |
637e8a60 AB |
2555 | |
2556 | return ret; | |
2557 | } | |
2558 | ||
2559 | #ifdef CONFIG_COMPAT | |
2560 | static long usbdev_compat_ioctl(struct file *file, unsigned int cmd, | |
2561 | unsigned long arg) | |
2562 | { | |
2563 | int ret; | |
2564 | ||
637e8a60 | 2565 | ret = usbdev_do_ioctl(file, cmd, compat_ptr(arg)); |
637e8a60 AB |
2566 | |
2567 | return ret; | |
2568 | } | |
2569 | #endif | |
2570 | ||
1da177e4 | 2571 | /* No kernel lock - fine */ |
04e482ff GKH |
2572 | static unsigned int usbdev_poll(struct file *file, |
2573 | struct poll_table_struct *wait) | |
1da177e4 | 2574 | { |
9b6f0c4b | 2575 | struct usb_dev_state *ps = file->private_data; |
ec17cf1c | 2576 | unsigned int mask = 0; |
1da177e4 LT |
2577 | |
2578 | poll_wait(file, &ps->wait, wait); | |
2579 | if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed)) | |
2580 | mask |= POLLOUT | POLLWRNORM; | |
349710c3 | 2581 | if (!connected(ps)) |
5cce4382 AS |
2582 | mask |= POLLHUP; |
2583 | if (list_empty(&ps->list)) | |
2584 | mask |= POLLERR; | |
1da177e4 LT |
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 | } |