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Commit | Line | Data |
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5fd54ace | 1 | // SPDX-License-Identifier: GPL-2.0+ |
1da177e4 LT |
2 | /*****************************************************************************/ |
3 | ||
4 | /* | |
5 | * devio.c -- User space communication with USB devices. | |
6 | * | |
7 | * Copyright (C) 1999-2000 Thomas Sailer (sailer@ife.ee.ethz.ch) | |
8 | * | |
1da177e4 LT |
9 | * This file implements the usbfs/x/y files, where |
10 | * x is the bus number and y the device number. | |
11 | * | |
12 | * It allows user space programs/"drivers" to communicate directly | |
13 | * with USB devices without intervening kernel driver. | |
14 | * | |
15 | * Revision history | |
16 | * 22.12.1999 0.1 Initial release (split from proc_usb.c) | |
17 | * 04.01.2000 0.2 Turned into its own filesystem | |
46113830 HW |
18 | * 30.09.2005 0.3 Fix user-triggerable oops in async URB delivery |
19 | * (CAN-2005-3055) | |
1da177e4 LT |
20 | */ |
21 | ||
22 | /*****************************************************************************/ | |
23 | ||
24 | #include <linux/fs.h> | |
25 | #include <linux/mm.h> | |
3f07c014 | 26 | #include <linux/sched/signal.h> |
1da177e4 | 27 | #include <linux/slab.h> |
1da177e4 LT |
28 | #include <linux/signal.h> |
29 | #include <linux/poll.h> | |
30 | #include <linux/module.h> | |
b11b2e1b | 31 | #include <linux/string.h> |
1da177e4 LT |
32 | #include <linux/usb.h> |
33 | #include <linux/usbdevice_fs.h> | |
27729aad | 34 | #include <linux/usb/hcd.h> /* for usbcore internals */ |
fbf82fd2 | 35 | #include <linux/cdev.h> |
a7b986b3 | 36 | #include <linux/notifier.h> |
7a01955f | 37 | #include <linux/security.h> |
d178bc3a | 38 | #include <linux/user_namespace.h> |
3d97ff63 | 39 | #include <linux/scatterlist.h> |
e6889b31 | 40 | #include <linux/uaccess.h> |
f7d34b44 | 41 | #include <linux/dma-mapping.h> |
1da177e4 LT |
42 | #include <asm/byteorder.h> |
43 | #include <linux/moduleparam.h> | |
44 | ||
1da177e4 LT |
45 | #include "usb.h" |
46 | ||
fbf82fd2 | 47 | #define USB_MAXBUS 64 |
fa86ad0b | 48 | #define USB_DEVICE_MAX (USB_MAXBUS * 128) |
3d97ff63 | 49 | #define USB_SG_SIZE 16384 /* split-size for large txs */ |
fbf82fd2 | 50 | |
4a2a8a2c AS |
51 | /* Mutual exclusion for removal, open, and release */ |
52 | DEFINE_MUTEX(usbfs_mutex); | |
53 | ||
9b6f0c4b | 54 | struct usb_dev_state { |
cd9f0375 AS |
55 | struct list_head list; /* state list */ |
56 | struct usb_device *dev; | |
57 | struct file *file; | |
58 | spinlock_t lock; /* protects the async urb lists */ | |
59 | struct list_head async_pending; | |
60 | struct list_head async_completed; | |
f7d34b44 | 61 | struct list_head memory_list; |
cd9f0375 AS |
62 | wait_queue_head_t wait; /* wake up if a request completed */ |
63 | unsigned int discsignr; | |
64 | struct pid *disc_pid; | |
d178bc3a | 65 | const struct cred *cred; |
cd9f0375 AS |
66 | void __user *disccontext; |
67 | unsigned long ifclaimed; | |
68 | u32 secid; | |
01c6460f | 69 | u32 disabled_bulk_eps; |
d883f52e RG |
70 | bool privileges_dropped; |
71 | unsigned long interface_allowed_mask; | |
cd9f0375 AS |
72 | }; |
73 | ||
f7d34b44 SG |
74 | struct usb_memory { |
75 | struct list_head memlist; | |
76 | int vma_use_count; | |
77 | int urb_use_count; | |
78 | u32 size; | |
79 | void *mem; | |
80 | dma_addr_t dma_handle; | |
81 | unsigned long vm_start; | |
82 | struct usb_dev_state *ps; | |
83 | }; | |
84 | ||
1da177e4 LT |
85 | struct async { |
86 | struct list_head asynclist; | |
9b6f0c4b | 87 | struct usb_dev_state *ps; |
2425c08b | 88 | struct pid *pid; |
d178bc3a | 89 | const struct cred *cred; |
1da177e4 LT |
90 | unsigned int signr; |
91 | unsigned int ifnum; | |
92 | void __user *userbuffer; | |
93 | void __user *userurb; | |
94 | struct urb *urb; | |
f7d34b44 | 95 | struct usb_memory *usbm; |
add1aaea | 96 | unsigned int mem_usage; |
e015268d | 97 | int status; |
7a01955f | 98 | u32 secid; |
01c6460f AS |
99 | u8 bulk_addr; |
100 | u8 bulk_status; | |
1da177e4 LT |
101 | }; |
102 | ||
90ab5ee9 | 103 | static bool usbfs_snoop; |
04e482ff GKH |
104 | module_param(usbfs_snoop, bool, S_IRUGO | S_IWUSR); |
105 | MODULE_PARM_DESC(usbfs_snoop, "true to log all usbfs traffic"); | |
1da177e4 | 106 | |
0290cc9f AS |
107 | static unsigned usbfs_snoop_max = 65536; |
108 | module_param(usbfs_snoop_max, uint, S_IRUGO | S_IWUSR); | |
109 | MODULE_PARM_DESC(usbfs_snoop_max, | |
110 | "maximum number of bytes to print while snooping"); | |
111 | ||
1da177e4 LT |
112 | #define snoop(dev, format, arg...) \ |
113 | do { \ | |
114 | if (usbfs_snoop) \ | |
f355e830 | 115 | dev_info(dev, format, ## arg); \ |
1da177e4 LT |
116 | } while (0) |
117 | ||
4c6e8971 AS |
118 | enum snoop_when { |
119 | SUBMIT, COMPLETE | |
120 | }; | |
fad21bdf | 121 | |
4c6e8971 | 122 | #define USB_DEVICE_DEV MKDEV(USB_DEVICE_MAJOR, 0) |
1da177e4 | 123 | |
add1aaea | 124 | /* Limit on the total amount of memory we can allocate for transfers */ |
1129d270 | 125 | static u32 usbfs_memory_mb = 16; |
3f5eb8d5 AS |
126 | module_param(usbfs_memory_mb, uint, 0644); |
127 | MODULE_PARM_DESC(usbfs_memory_mb, | |
128 | "maximum MB allowed for usbfs buffers (0 = no limit)"); | |
129 | ||
57999d11 DC |
130 | /* Hard limit, necessary to avoid arithmetic overflow */ |
131 | #define USBFS_XFER_MAX (UINT_MAX / 2 - 1000000) | |
132 | ||
1129d270 | 133 | static atomic64_t usbfs_memory_usage; /* Total memory currently allocated */ |
add1aaea AS |
134 | |
135 | /* Check whether it's okay to allocate more memory for a transfer */ | |
1129d270 | 136 | static int usbfs_increase_memory_usage(u64 amount) |
add1aaea | 137 | { |
1129d270 | 138 | u64 lim; |
3f5eb8d5 | 139 | |
6aa7de05 | 140 | lim = READ_ONCE(usbfs_memory_mb); |
1129d270 | 141 | lim <<= 20; |
3f5eb8d5 | 142 | |
1129d270 MB |
143 | atomic64_add(amount, &usbfs_memory_usage); |
144 | ||
145 | if (lim > 0 && atomic64_read(&usbfs_memory_usage) > lim) { | |
146 | atomic64_sub(amount, &usbfs_memory_usage); | |
147 | return -ENOMEM; | |
148 | } | |
149 | ||
150 | return 0; | |
add1aaea AS |
151 | } |
152 | ||
153 | /* Memory for a transfer is being deallocated */ | |
1129d270 | 154 | static void usbfs_decrease_memory_usage(u64 amount) |
add1aaea | 155 | { |
1129d270 | 156 | atomic64_sub(amount, &usbfs_memory_usage); |
add1aaea | 157 | } |
4c6e8971 | 158 | |
9b6f0c4b | 159 | static int connected(struct usb_dev_state *ps) |
1da177e4 | 160 | { |
349710c3 AS |
161 | return (!list_empty(&ps->list) && |
162 | ps->dev->state != USB_STATE_NOTATTACHED); | |
1da177e4 LT |
163 | } |
164 | ||
f7d34b44 SG |
165 | static void dec_usb_memory_use_count(struct usb_memory *usbm, int *count) |
166 | { | |
167 | struct usb_dev_state *ps = usbm->ps; | |
168 | unsigned long flags; | |
169 | ||
170 | spin_lock_irqsave(&ps->lock, flags); | |
171 | --*count; | |
172 | if (usbm->urb_use_count == 0 && usbm->vma_use_count == 0) { | |
173 | list_del(&usbm->memlist); | |
174 | spin_unlock_irqrestore(&ps->lock, flags); | |
175 | ||
176 | usb_free_coherent(ps->dev, usbm->size, usbm->mem, | |
177 | usbm->dma_handle); | |
178 | usbfs_decrease_memory_usage( | |
179 | usbm->size + sizeof(struct usb_memory)); | |
180 | kfree(usbm); | |
181 | } else { | |
182 | spin_unlock_irqrestore(&ps->lock, flags); | |
183 | } | |
184 | } | |
185 | ||
186 | static void usbdev_vm_open(struct vm_area_struct *vma) | |
187 | { | |
188 | struct usb_memory *usbm = vma->vm_private_data; | |
189 | unsigned long flags; | |
190 | ||
191 | spin_lock_irqsave(&usbm->ps->lock, flags); | |
192 | ++usbm->vma_use_count; | |
193 | spin_unlock_irqrestore(&usbm->ps->lock, flags); | |
194 | } | |
195 | ||
196 | static void usbdev_vm_close(struct vm_area_struct *vma) | |
197 | { | |
198 | struct usb_memory *usbm = vma->vm_private_data; | |
199 | ||
200 | dec_usb_memory_use_count(usbm, &usbm->vma_use_count); | |
201 | } | |
202 | ||
b64d47ae | 203 | static const struct vm_operations_struct usbdev_vm_ops = { |
f7d34b44 SG |
204 | .open = usbdev_vm_open, |
205 | .close = usbdev_vm_close | |
206 | }; | |
207 | ||
208 | static int usbdev_mmap(struct file *file, struct vm_area_struct *vma) | |
209 | { | |
210 | struct usb_memory *usbm = NULL; | |
211 | struct usb_dev_state *ps = file->private_data; | |
212 | size_t size = vma->vm_end - vma->vm_start; | |
213 | void *mem; | |
214 | unsigned long flags; | |
215 | dma_addr_t dma_handle; | |
216 | int ret; | |
217 | ||
218 | ret = usbfs_increase_memory_usage(size + sizeof(struct usb_memory)); | |
219 | if (ret) | |
220 | goto error; | |
221 | ||
222 | usbm = kzalloc(sizeof(struct usb_memory), GFP_KERNEL); | |
223 | if (!usbm) { | |
224 | ret = -ENOMEM; | |
225 | goto error_decrease_mem; | |
226 | } | |
227 | ||
70f7ca9a JS |
228 | mem = usb_alloc_coherent(ps->dev, size, GFP_USER | __GFP_NOWARN, |
229 | &dma_handle); | |
f7d34b44 SG |
230 | if (!mem) { |
231 | ret = -ENOMEM; | |
232 | goto error_free_usbm; | |
233 | } | |
234 | ||
235 | memset(mem, 0, size); | |
236 | ||
237 | usbm->mem = mem; | |
238 | usbm->dma_handle = dma_handle; | |
239 | usbm->size = size; | |
240 | usbm->ps = ps; | |
241 | usbm->vm_start = vma->vm_start; | |
242 | usbm->vma_use_count = 1; | |
243 | INIT_LIST_HEAD(&usbm->memlist); | |
244 | ||
245 | if (remap_pfn_range(vma, vma->vm_start, | |
246 | virt_to_phys(usbm->mem) >> PAGE_SHIFT, | |
247 | size, vma->vm_page_prot) < 0) { | |
248 | dec_usb_memory_use_count(usbm, &usbm->vma_use_count); | |
249 | return -EAGAIN; | |
250 | } | |
251 | ||
252 | vma->vm_flags |= VM_IO; | |
253 | vma->vm_flags |= (VM_DONTEXPAND | VM_DONTDUMP); | |
254 | vma->vm_ops = &usbdev_vm_ops; | |
255 | vma->vm_private_data = usbm; | |
256 | ||
257 | spin_lock_irqsave(&ps->lock, flags); | |
258 | list_add_tail(&usbm->memlist, &ps->memory_list); | |
259 | spin_unlock_irqrestore(&ps->lock, flags); | |
260 | ||
261 | return 0; | |
262 | ||
263 | error_free_usbm: | |
264 | kfree(usbm); | |
265 | error_decrease_mem: | |
266 | usbfs_decrease_memory_usage(size + sizeof(struct usb_memory)); | |
267 | error: | |
268 | return ret; | |
269 | } | |
270 | ||
04e482ff GKH |
271 | static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes, |
272 | loff_t *ppos) | |
1da177e4 | 273 | { |
9b6f0c4b | 274 | struct usb_dev_state *ps = file->private_data; |
1da177e4 LT |
275 | struct usb_device *dev = ps->dev; |
276 | ssize_t ret = 0; | |
277 | unsigned len; | |
278 | loff_t pos; | |
279 | int i; | |
280 | ||
281 | pos = *ppos; | |
282 | usb_lock_device(dev); | |
349710c3 | 283 | if (!connected(ps)) { |
1da177e4 LT |
284 | ret = -ENODEV; |
285 | goto err; | |
286 | } else if (pos < 0) { | |
287 | ret = -EINVAL; | |
288 | goto err; | |
289 | } | |
290 | ||
291 | if (pos < sizeof(struct usb_device_descriptor)) { | |
04e482ff GKH |
292 | /* 18 bytes - fits on the stack */ |
293 | struct usb_device_descriptor temp_desc; | |
8781ba0a ON |
294 | |
295 | memcpy(&temp_desc, &dev->descriptor, sizeof(dev->descriptor)); | |
9fcd5c32 AM |
296 | le16_to_cpus(&temp_desc.bcdUSB); |
297 | le16_to_cpus(&temp_desc.idVendor); | |
298 | le16_to_cpus(&temp_desc.idProduct); | |
299 | le16_to_cpus(&temp_desc.bcdDevice); | |
1da177e4 LT |
300 | |
301 | len = sizeof(struct usb_device_descriptor) - pos; | |
302 | if (len > nbytes) | |
303 | len = nbytes; | |
8781ba0a | 304 | if (copy_to_user(buf, ((char *)&temp_desc) + pos, len)) { |
1da177e4 LT |
305 | ret = -EFAULT; |
306 | goto err; | |
307 | } | |
1da177e4 LT |
308 | |
309 | *ppos += len; | |
310 | buf += len; | |
311 | nbytes -= len; | |
312 | ret += len; | |
313 | } | |
314 | ||
315 | pos = sizeof(struct usb_device_descriptor); | |
316 | for (i = 0; nbytes && i < dev->descriptor.bNumConfigurations; i++) { | |
317 | struct usb_config_descriptor *config = | |
318 | (struct usb_config_descriptor *)dev->rawdescriptors[i]; | |
319 | unsigned int length = le16_to_cpu(config->wTotalLength); | |
320 | ||
321 | if (*ppos < pos + length) { | |
322 | ||
323 | /* The descriptor may claim to be longer than it | |
324 | * really is. Here is the actual allocated length. */ | |
325 | unsigned alloclen = | |
326 | le16_to_cpu(dev->config[i].desc.wTotalLength); | |
327 | ||
328 | len = length - (*ppos - pos); | |
329 | if (len > nbytes) | |
330 | len = nbytes; | |
331 | ||
332 | /* Simply don't write (skip over) unallocated parts */ | |
333 | if (alloclen > (*ppos - pos)) { | |
334 | alloclen -= (*ppos - pos); | |
335 | if (copy_to_user(buf, | |
336 | dev->rawdescriptors[i] + (*ppos - pos), | |
337 | min(len, alloclen))) { | |
338 | ret = -EFAULT; | |
339 | goto err; | |
340 | } | |
341 | } | |
342 | ||
343 | *ppos += len; | |
344 | buf += len; | |
345 | nbytes -= len; | |
346 | ret += len; | |
347 | } | |
348 | ||
349 | pos += length; | |
350 | } | |
351 | ||
352 | err: | |
353 | usb_unlock_device(dev); | |
354 | return ret; | |
355 | } | |
356 | ||
357 | /* | |
358 | * async list handling | |
359 | */ | |
360 | ||
361 | static struct async *alloc_async(unsigned int numisoframes) | |
362 | { | |
dd95b814 | 363 | struct async *as; |
0a1ef3b5 | 364 | |
dd95b814 | 365 | as = kzalloc(sizeof(struct async), GFP_KERNEL); |
04e482ff GKH |
366 | if (!as) |
367 | return NULL; | |
1da177e4 LT |
368 | as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL); |
369 | if (!as->urb) { | |
370 | kfree(as); | |
371 | return NULL; | |
372 | } | |
04e482ff | 373 | return as; |
1da177e4 LT |
374 | } |
375 | ||
376 | static void free_async(struct async *as) | |
377 | { | |
3d97ff63 HG |
378 | int i; |
379 | ||
2425c08b | 380 | put_pid(as->pid); |
1b41c832 SS |
381 | if (as->cred) |
382 | put_cred(as->cred); | |
3d97ff63 HG |
383 | for (i = 0; i < as->urb->num_sgs; i++) { |
384 | if (sg_page(&as->urb->sg[i])) | |
385 | kfree(sg_virt(&as->urb->sg[i])); | |
386 | } | |
f7d34b44 | 387 | |
3d97ff63 | 388 | kfree(as->urb->sg); |
f7d34b44 SG |
389 | if (as->usbm == NULL) |
390 | kfree(as->urb->transfer_buffer); | |
391 | else | |
392 | dec_usb_memory_use_count(as->usbm, &as->usbm->urb_use_count); | |
393 | ||
6fd19f4b | 394 | kfree(as->urb->setup_packet); |
1da177e4 | 395 | usb_free_urb(as->urb); |
add1aaea | 396 | usbfs_decrease_memory_usage(as->mem_usage); |
6fd19f4b | 397 | kfree(as); |
1da177e4 LT |
398 | } |
399 | ||
d34d9721 | 400 | static void async_newpending(struct async *as) |
1da177e4 | 401 | { |
9b6f0c4b | 402 | struct usb_dev_state *ps = as->ps; |
04e482ff GKH |
403 | unsigned long flags; |
404 | ||
405 | spin_lock_irqsave(&ps->lock, flags); | |
406 | list_add_tail(&as->asynclist, &ps->async_pending); | |
407 | spin_unlock_irqrestore(&ps->lock, flags); | |
1da177e4 LT |
408 | } |
409 | ||
d34d9721 | 410 | static void async_removepending(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_del_init(&as->asynclist); | |
417 | spin_unlock_irqrestore(&ps->lock, flags); | |
1da177e4 LT |
418 | } |
419 | ||
9b6f0c4b | 420 | static struct async *async_getcompleted(struct usb_dev_state *ps) |
1da177e4 | 421 | { |
04e482ff GKH |
422 | unsigned long flags; |
423 | struct async *as = NULL; | |
424 | ||
425 | spin_lock_irqsave(&ps->lock, flags); | |
426 | if (!list_empty(&ps->async_completed)) { | |
427 | as = list_entry(ps->async_completed.next, struct async, | |
428 | asynclist); | |
429 | list_del_init(&as->asynclist); | |
430 | } | |
431 | spin_unlock_irqrestore(&ps->lock, flags); | |
432 | return as; | |
1da177e4 LT |
433 | } |
434 | ||
9b6f0c4b | 435 | static struct async *async_getpending(struct usb_dev_state *ps, |
04e482ff | 436 | void __user *userurb) |
1da177e4 | 437 | { |
04e482ff | 438 | struct async *as; |
1da177e4 | 439 | |
1da177e4 LT |
440 | list_for_each_entry(as, &ps->async_pending, asynclist) |
441 | if (as->userurb == userurb) { | |
442 | list_del_init(&as->asynclist); | |
1da177e4 LT |
443 | return as; |
444 | } | |
4e09dcf2 | 445 | |
04e482ff | 446 | return NULL; |
1da177e4 LT |
447 | } |
448 | ||
4c6e8971 AS |
449 | static void snoop_urb(struct usb_device *udev, |
450 | void __user *userurb, int pipe, unsigned length, | |
0880aef4 CF |
451 | int timeout_or_status, enum snoop_when when, |
452 | unsigned char *data, unsigned data_len) | |
e639dd3f | 453 | { |
4c6e8971 AS |
454 | static const char *types[] = {"isoc", "int", "ctrl", "bulk"}; |
455 | static const char *dirs[] = {"out", "in"}; | |
456 | int ep; | |
457 | const char *t, *d; | |
e639dd3f GKH |
458 | |
459 | if (!usbfs_snoop) | |
460 | return; | |
461 | ||
4c6e8971 AS |
462 | ep = usb_pipeendpoint(pipe); |
463 | t = types[usb_pipetype(pipe)]; | |
464 | d = dirs[!!usb_pipein(pipe)]; | |
465 | ||
466 | if (userurb) { /* Async */ | |
467 | if (when == SUBMIT) | |
2f964780 | 468 | dev_info(&udev->dev, "userurb %pK, ep%d %s-%s, " |
4c6e8971 AS |
469 | "length %u\n", |
470 | userurb, ep, t, d, length); | |
471 | else | |
2f964780 | 472 | dev_info(&udev->dev, "userurb %pK, ep%d %s-%s, " |
4c6e8971 AS |
473 | "actual_length %u status %d\n", |
474 | userurb, ep, t, d, length, | |
475 | timeout_or_status); | |
476 | } else { | |
477 | if (when == SUBMIT) | |
478 | dev_info(&udev->dev, "ep%d %s-%s, length %u, " | |
479 | "timeout %d\n", | |
480 | ep, t, d, length, timeout_or_status); | |
481 | else | |
482 | dev_info(&udev->dev, "ep%d %s-%s, actual_length %u, " | |
483 | "status %d\n", | |
484 | ep, t, d, length, timeout_or_status); | |
485 | } | |
0880aef4 | 486 | |
0290cc9f | 487 | data_len = min(data_len, usbfs_snoop_max); |
0880aef4 CF |
488 | if (data && data_len > 0) { |
489 | print_hex_dump(KERN_DEBUG, "data: ", DUMP_PREFIX_NONE, 32, 1, | |
490 | data, data_len, 1); | |
491 | } | |
e639dd3f GKH |
492 | } |
493 | ||
3d97ff63 HG |
494 | static void snoop_urb_data(struct urb *urb, unsigned len) |
495 | { | |
496 | int i, size; | |
497 | ||
0290cc9f AS |
498 | len = min(len, usbfs_snoop_max); |
499 | if (!usbfs_snoop || len == 0) | |
3d97ff63 HG |
500 | return; |
501 | ||
502 | if (urb->num_sgs == 0) { | |
503 | print_hex_dump(KERN_DEBUG, "data: ", DUMP_PREFIX_NONE, 32, 1, | |
504 | urb->transfer_buffer, len, 1); | |
505 | return; | |
506 | } | |
507 | ||
508 | for (i = 0; i < urb->num_sgs && len; i++) { | |
509 | size = (len > USB_SG_SIZE) ? USB_SG_SIZE : len; | |
510 | print_hex_dump(KERN_DEBUG, "data: ", DUMP_PREFIX_NONE, 32, 1, | |
511 | sg_virt(&urb->sg[i]), size, 1); | |
512 | len -= size; | |
513 | } | |
514 | } | |
515 | ||
516 | static int copy_urb_data_to_user(u8 __user *userbuffer, struct urb *urb) | |
517 | { | |
518 | unsigned i, len, size; | |
519 | ||
520 | if (urb->number_of_packets > 0) /* Isochronous */ | |
521 | len = urb->transfer_buffer_length; | |
522 | else /* Non-Isoc */ | |
523 | len = urb->actual_length; | |
524 | ||
525 | if (urb->num_sgs == 0) { | |
526 | if (copy_to_user(userbuffer, urb->transfer_buffer, len)) | |
527 | return -EFAULT; | |
528 | return 0; | |
529 | } | |
530 | ||
531 | for (i = 0; i < urb->num_sgs && len; i++) { | |
532 | size = (len > USB_SG_SIZE) ? USB_SG_SIZE : len; | |
533 | if (copy_to_user(userbuffer, sg_virt(&urb->sg[i]), size)) | |
534 | return -EFAULT; | |
535 | userbuffer += size; | |
536 | len -= size; | |
537 | } | |
538 | ||
539 | return 0; | |
540 | } | |
541 | ||
01c6460f AS |
542 | #define AS_CONTINUATION 1 |
543 | #define AS_UNLINK 2 | |
544 | ||
9b6f0c4b | 545 | static void cancel_bulk_urbs(struct usb_dev_state *ps, unsigned bulk_addr) |
01c6460f AS |
546 | __releases(ps->lock) |
547 | __acquires(ps->lock) | |
548 | { | |
4e09dcf2 | 549 | struct urb *urb; |
01c6460f AS |
550 | struct async *as; |
551 | ||
552 | /* Mark all the pending URBs that match bulk_addr, up to but not | |
553 | * including the first one without AS_CONTINUATION. If such an | |
554 | * URB is encountered then a new transfer has already started so | |
555 | * the endpoint doesn't need to be disabled; otherwise it does. | |
556 | */ | |
557 | list_for_each_entry(as, &ps->async_pending, asynclist) { | |
558 | if (as->bulk_addr == bulk_addr) { | |
559 | if (as->bulk_status != AS_CONTINUATION) | |
560 | goto rescan; | |
561 | as->bulk_status = AS_UNLINK; | |
562 | as->bulk_addr = 0; | |
563 | } | |
564 | } | |
565 | ps->disabled_bulk_eps |= (1 << bulk_addr); | |
566 | ||
567 | /* Now carefully unlink all the marked pending URBs */ | |
568 | rescan: | |
569 | list_for_each_entry(as, &ps->async_pending, asynclist) { | |
570 | if (as->bulk_status == AS_UNLINK) { | |
571 | as->bulk_status = 0; /* Only once */ | |
4e09dcf2 HL |
572 | urb = as->urb; |
573 | usb_get_urb(urb); | |
01c6460f | 574 | spin_unlock(&ps->lock); /* Allow completions */ |
4e09dcf2 HL |
575 | usb_unlink_urb(urb); |
576 | usb_put_urb(urb); | |
01c6460f AS |
577 | spin_lock(&ps->lock); |
578 | goto rescan; | |
579 | } | |
580 | } | |
581 | } | |
582 | ||
7d12e780 | 583 | static void async_completed(struct urb *urb) |
1da177e4 | 584 | { |
04e482ff | 585 | struct async *as = urb->context; |
9b6f0c4b | 586 | struct usb_dev_state *ps = as->ps; |
1da177e4 | 587 | struct siginfo sinfo; |
516a1a07 | 588 | struct pid *pid = NULL; |
516a1a07 | 589 | u32 secid = 0; |
d178bc3a | 590 | const struct cred *cred = NULL; |
516a1a07 | 591 | int signr; |
1da177e4 | 592 | |
04e482ff GKH |
593 | spin_lock(&ps->lock); |
594 | list_move_tail(&as->asynclist, &ps->async_completed); | |
e015268d | 595 | as->status = urb->status; |
516a1a07 ON |
596 | signr = as->signr; |
597 | if (signr) { | |
3b10db2b | 598 | clear_siginfo(&sinfo); |
1da177e4 | 599 | sinfo.si_signo = as->signr; |
e015268d | 600 | sinfo.si_errno = as->status; |
1da177e4 LT |
601 | sinfo.si_code = SI_ASYNCIO; |
602 | sinfo.si_addr = as->userurb; | |
aec01c58 | 603 | pid = get_pid(as->pid); |
d178bc3a | 604 | cred = get_cred(as->cred); |
516a1a07 | 605 | secid = as->secid; |
1da177e4 | 606 | } |
e639dd3f | 607 | snoop(&urb->dev->dev, "urb complete\n"); |
4c6e8971 | 608 | snoop_urb(urb->dev, as->userurb, urb->pipe, urb->actual_length, |
3d97ff63 | 609 | as->status, COMPLETE, NULL, 0); |
83ed07c5 | 610 | if ((urb->transfer_flags & URB_DIR_MASK) == URB_DIR_IN) |
3d97ff63 HG |
611 | snoop_urb_data(urb, urb->actual_length); |
612 | ||
01c6460f AS |
613 | if (as->status < 0 && as->bulk_addr && as->status != -ECONNRESET && |
614 | as->status != -ENOENT) | |
615 | cancel_bulk_urbs(ps, as->bulk_addr); | |
ed62ca2f DA |
616 | |
617 | wake_up(&ps->wait); | |
516a1a07 ON |
618 | spin_unlock(&ps->lock); |
619 | ||
aec01c58 | 620 | if (signr) { |
d178bc3a | 621 | kill_pid_info_as_cred(sinfo.si_signo, &sinfo, pid, cred, secid); |
aec01c58 | 622 | put_pid(pid); |
d178bc3a | 623 | put_cred(cred); |
aec01c58 | 624 | } |
1da177e4 LT |
625 | } |
626 | ||
9b6f0c4b | 627 | static void destroy_async(struct usb_dev_state *ps, struct list_head *list) |
1da177e4 | 628 | { |
4e09dcf2 | 629 | struct urb *urb; |
1da177e4 LT |
630 | struct async *as; |
631 | unsigned long flags; | |
632 | ||
633 | spin_lock_irqsave(&ps->lock, flags); | |
634 | while (!list_empty(list)) { | |
635 | as = list_entry(list->next, struct async, asynclist); | |
636 | list_del_init(&as->asynclist); | |
4e09dcf2 HL |
637 | urb = as->urb; |
638 | usb_get_urb(urb); | |
1da177e4 LT |
639 | |
640 | /* drop the spinlock so the completion handler can run */ | |
641 | spin_unlock_irqrestore(&ps->lock, flags); | |
4e09dcf2 HL |
642 | usb_kill_urb(urb); |
643 | usb_put_urb(urb); | |
1da177e4 LT |
644 | spin_lock_irqsave(&ps->lock, flags); |
645 | } | |
646 | spin_unlock_irqrestore(&ps->lock, flags); | |
1da177e4 LT |
647 | } |
648 | ||
9b6f0c4b | 649 | static void destroy_async_on_interface(struct usb_dev_state *ps, |
04e482ff | 650 | unsigned int ifnum) |
1da177e4 LT |
651 | { |
652 | struct list_head *p, *q, hitlist; | |
653 | unsigned long flags; | |
654 | ||
655 | INIT_LIST_HEAD(&hitlist); | |
656 | spin_lock_irqsave(&ps->lock, flags); | |
657 | list_for_each_safe(p, q, &ps->async_pending) | |
658 | if (ifnum == list_entry(p, struct async, asynclist)->ifnum) | |
659 | list_move_tail(p, &hitlist); | |
660 | spin_unlock_irqrestore(&ps->lock, flags); | |
661 | destroy_async(ps, &hitlist); | |
662 | } | |
663 | ||
9b6f0c4b | 664 | static void destroy_all_async(struct usb_dev_state *ps) |
1da177e4 | 665 | { |
04e482ff | 666 | destroy_async(ps, &ps->async_pending); |
1da177e4 LT |
667 | } |
668 | ||
669 | /* | |
670 | * interface claims are made only at the request of user level code, | |
671 | * which can also release them (explicitly or by closing files). | |
672 | * they're also undone when devices disconnect. | |
673 | */ | |
674 | ||
04e482ff GKH |
675 | static int driver_probe(struct usb_interface *intf, |
676 | const struct usb_device_id *id) | |
1da177e4 LT |
677 | { |
678 | return -ENODEV; | |
679 | } | |
680 | ||
681 | static void driver_disconnect(struct usb_interface *intf) | |
682 | { | |
9b6f0c4b | 683 | struct usb_dev_state *ps = usb_get_intfdata(intf); |
1da177e4 LT |
684 | unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber; |
685 | ||
686 | if (!ps) | |
687 | return; | |
688 | ||
689 | /* NOTE: this relies on usbcore having canceled and completed | |
690 | * all pending I/O requests; 2.6 does that. | |
691 | */ | |
692 | ||
693 | if (likely(ifnum < 8*sizeof(ps->ifclaimed))) | |
694 | clear_bit(ifnum, &ps->ifclaimed); | |
695 | else | |
3b6004f3 GKH |
696 | dev_warn(&intf->dev, "interface number %u out of range\n", |
697 | ifnum); | |
1da177e4 | 698 | |
04e482ff | 699 | usb_set_intfdata(intf, NULL); |
1da177e4 LT |
700 | |
701 | /* force async requests to complete */ | |
702 | destroy_async_on_interface(ps, ifnum); | |
703 | } | |
704 | ||
2e2eb83f AS |
705 | /* The following routines are merely placeholders. There is no way |
706 | * to inform a user task about suspend or resumes. | |
707 | */ | |
708 | static int driver_suspend(struct usb_interface *intf, pm_message_t msg) | |
709 | { | |
710 | return 0; | |
711 | } | |
712 | ||
713 | static int driver_resume(struct usb_interface *intf) | |
714 | { | |
715 | return 0; | |
716 | } | |
717 | ||
1da177e4 | 718 | struct usb_driver usbfs_driver = { |
1da177e4 LT |
719 | .name = "usbfs", |
720 | .probe = driver_probe, | |
721 | .disconnect = driver_disconnect, | |
2e2eb83f AS |
722 | .suspend = driver_suspend, |
723 | .resume = driver_resume, | |
1da177e4 LT |
724 | }; |
725 | ||
9b6f0c4b | 726 | static int claimintf(struct usb_dev_state *ps, unsigned int ifnum) |
1da177e4 LT |
727 | { |
728 | struct usb_device *dev = ps->dev; | |
729 | struct usb_interface *intf; | |
730 | int err; | |
731 | ||
732 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
733 | return -EINVAL; | |
734 | /* already claimed */ | |
735 | if (test_bit(ifnum, &ps->ifclaimed)) | |
736 | return 0; | |
737 | ||
d883f52e RG |
738 | if (ps->privileges_dropped && |
739 | !test_bit(ifnum, &ps->interface_allowed_mask)) | |
740 | return -EACCES; | |
741 | ||
1da177e4 LT |
742 | intf = usb_ifnum_to_if(dev, ifnum); |
743 | if (!intf) | |
744 | err = -ENOENT; | |
745 | else | |
746 | err = usb_driver_claim_interface(&usbfs_driver, intf, ps); | |
1da177e4 LT |
747 | if (err == 0) |
748 | set_bit(ifnum, &ps->ifclaimed); | |
749 | return err; | |
750 | } | |
751 | ||
9b6f0c4b | 752 | static int releaseintf(struct usb_dev_state *ps, unsigned int ifnum) |
1da177e4 LT |
753 | { |
754 | struct usb_device *dev; | |
755 | struct usb_interface *intf; | |
756 | int err; | |
757 | ||
758 | err = -EINVAL; | |
759 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
760 | return err; | |
761 | dev = ps->dev; | |
1da177e4 LT |
762 | intf = usb_ifnum_to_if(dev, ifnum); |
763 | if (!intf) | |
764 | err = -ENOENT; | |
765 | else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) { | |
766 | usb_driver_release_interface(&usbfs_driver, intf); | |
767 | err = 0; | |
768 | } | |
1da177e4 LT |
769 | return err; |
770 | } | |
771 | ||
9b6f0c4b | 772 | static int checkintf(struct usb_dev_state *ps, unsigned int ifnum) |
1da177e4 LT |
773 | { |
774 | if (ps->dev->state != USB_STATE_CONFIGURED) | |
775 | return -EHOSTUNREACH; | |
776 | if (ifnum >= 8*sizeof(ps->ifclaimed)) | |
777 | return -EINVAL; | |
778 | if (test_bit(ifnum, &ps->ifclaimed)) | |
779 | return 0; | |
780 | /* if not yet claimed, claim it for the driver */ | |
04e482ff GKH |
781 | dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim " |
782 | "interface %u before use\n", task_pid_nr(current), | |
783 | current->comm, ifnum); | |
1da177e4 LT |
784 | return claimintf(ps, ifnum); |
785 | } | |
786 | ||
787 | static int findintfep(struct usb_device *dev, unsigned int ep) | |
788 | { | |
789 | unsigned int i, j, e; | |
04e482ff | 790 | struct usb_interface *intf; |
1da177e4 LT |
791 | struct usb_host_interface *alts; |
792 | struct usb_endpoint_descriptor *endpt; | |
793 | ||
794 | if (ep & ~(USB_DIR_IN|0xf)) | |
795 | return -EINVAL; | |
796 | if (!dev->actconfig) | |
797 | return -ESRCH; | |
798 | for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) { | |
799 | intf = dev->actconfig->interface[i]; | |
800 | for (j = 0; j < intf->num_altsetting; j++) { | |
04e482ff | 801 | alts = &intf->altsetting[j]; |
1da177e4 LT |
802 | for (e = 0; e < alts->desc.bNumEndpoints; e++) { |
803 | endpt = &alts->endpoint[e].desc; | |
804 | if (endpt->bEndpointAddress == ep) | |
805 | return alts->desc.bInterfaceNumber; | |
806 | } | |
807 | } | |
808 | } | |
04e482ff | 809 | return -ENOENT; |
1da177e4 LT |
810 | } |
811 | ||
9b6f0c4b | 812 | static int check_ctrlrecip(struct usb_dev_state *ps, unsigned int requesttype, |
393cbb51 | 813 | unsigned int request, unsigned int index) |
1da177e4 LT |
814 | { |
815 | int ret = 0; | |
393cbb51 | 816 | struct usb_host_interface *alt_setting; |
1da177e4 | 817 | |
6da9c990 DV |
818 | if (ps->dev->state != USB_STATE_UNAUTHENTICATED |
819 | && ps->dev->state != USB_STATE_ADDRESS | |
24f8b116 | 820 | && ps->dev->state != USB_STATE_CONFIGURED) |
1da177e4 LT |
821 | return -EHOSTUNREACH; |
822 | if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype)) | |
823 | return 0; | |
824 | ||
393cbb51 MD |
825 | /* |
826 | * check for the special corner case 'get_device_id' in the printer | |
5dc50c35 HG |
827 | * class specification, which we always want to allow as it is used |
828 | * to query things like ink level, etc. | |
393cbb51 MD |
829 | */ |
830 | if (requesttype == 0xa1 && request == 0) { | |
831 | alt_setting = usb_find_alt_setting(ps->dev->actconfig, | |
832 | index >> 8, index & 0xff); | |
833 | if (alt_setting | |
834 | && alt_setting->desc.bInterfaceClass == USB_CLASS_PRINTER) | |
5dc50c35 | 835 | return 0; |
393cbb51 MD |
836 | } |
837 | ||
1da177e4 LT |
838 | index &= 0xff; |
839 | switch (requesttype & USB_RECIP_MASK) { | |
840 | case USB_RECIP_ENDPOINT: | |
1361bf4b HG |
841 | if ((index & ~USB_DIR_IN) == 0) |
842 | return 0; | |
04e482ff | 843 | ret = findintfep(ps->dev, index); |
831abf76 KG |
844 | if (ret < 0) { |
845 | /* | |
846 | * Some not fully compliant Win apps seem to get | |
847 | * index wrong and have the endpoint number here | |
848 | * rather than the endpoint address (with the | |
849 | * correct direction). Win does let this through, | |
850 | * so we'll not reject it here but leave it to | |
851 | * the device to not break KVM. But we warn. | |
852 | */ | |
853 | ret = findintfep(ps->dev, index ^ 0x80); | |
854 | if (ret >= 0) | |
855 | dev_info(&ps->dev->dev, | |
856 | "%s: process %i (%s) requesting ep %02x but needs %02x\n", | |
857 | __func__, task_pid_nr(current), | |
858 | current->comm, index, index ^ 0x80); | |
859 | } | |
04e482ff | 860 | if (ret >= 0) |
1da177e4 LT |
861 | ret = checkintf(ps, ret); |
862 | break; | |
863 | ||
864 | case USB_RECIP_INTERFACE: | |
865 | ret = checkintf(ps, index); | |
866 | break; | |
867 | } | |
868 | return ret; | |
869 | } | |
870 | ||
2fec32b0 HG |
871 | static struct usb_host_endpoint *ep_to_host_endpoint(struct usb_device *dev, |
872 | unsigned char ep) | |
873 | { | |
874 | if (ep & USB_ENDPOINT_DIR_MASK) | |
875 | return dev->ep_in[ep & USB_ENDPOINT_NUMBER_MASK]; | |
876 | else | |
877 | return dev->ep_out[ep & USB_ENDPOINT_NUMBER_MASK]; | |
878 | } | |
879 | ||
3e75c6de | 880 | static int parse_usbdevfs_streams(struct usb_dev_state *ps, |
bcf7f6e3 HG |
881 | struct usbdevfs_streams __user *streams, |
882 | unsigned int *num_streams_ret, | |
883 | unsigned int *num_eps_ret, | |
884 | struct usb_host_endpoint ***eps_ret, | |
885 | struct usb_interface **intf_ret) | |
886 | { | |
887 | unsigned int i, num_streams, num_eps; | |
888 | struct usb_host_endpoint **eps; | |
889 | struct usb_interface *intf = NULL; | |
890 | unsigned char ep; | |
891 | int ifnum, ret; | |
892 | ||
893 | if (get_user(num_streams, &streams->num_streams) || | |
894 | get_user(num_eps, &streams->num_eps)) | |
895 | return -EFAULT; | |
896 | ||
897 | if (num_eps < 1 || num_eps > USB_MAXENDPOINTS) | |
898 | return -EINVAL; | |
899 | ||
900 | /* The XHCI controller allows max 2 ^ 16 streams */ | |
901 | if (num_streams_ret && (num_streams < 2 || num_streams > 65536)) | |
902 | return -EINVAL; | |
903 | ||
904 | eps = kmalloc(num_eps * sizeof(*eps), GFP_KERNEL); | |
905 | if (!eps) | |
906 | return -ENOMEM; | |
907 | ||
908 | for (i = 0; i < num_eps; i++) { | |
909 | if (get_user(ep, &streams->eps[i])) { | |
910 | ret = -EFAULT; | |
911 | goto error; | |
912 | } | |
913 | eps[i] = ep_to_host_endpoint(ps->dev, ep); | |
914 | if (!eps[i]) { | |
915 | ret = -EINVAL; | |
916 | goto error; | |
917 | } | |
918 | ||
919 | /* usb_alloc/free_streams operate on an usb_interface */ | |
920 | ifnum = findintfep(ps->dev, ep); | |
921 | if (ifnum < 0) { | |
922 | ret = ifnum; | |
923 | goto error; | |
924 | } | |
925 | ||
926 | if (i == 0) { | |
927 | ret = checkintf(ps, ifnum); | |
928 | if (ret < 0) | |
929 | goto error; | |
930 | intf = usb_ifnum_to_if(ps->dev, ifnum); | |
931 | } else { | |
932 | /* Verify all eps belong to the same interface */ | |
933 | if (ifnum != intf->altsetting->desc.bInterfaceNumber) { | |
934 | ret = -EINVAL; | |
935 | goto error; | |
936 | } | |
937 | } | |
938 | } | |
939 | ||
940 | if (num_streams_ret) | |
941 | *num_streams_ret = num_streams; | |
942 | *num_eps_ret = num_eps; | |
943 | *eps_ret = eps; | |
944 | *intf_ret = intf; | |
945 | ||
946 | return 0; | |
947 | ||
948 | error: | |
949 | kfree(eps); | |
950 | return ret; | |
951 | } | |
952 | ||
61ad04a8 | 953 | static int match_devt(struct device *dev, void *data) |
4592bf5a | 954 | { |
a80d5ff0 | 955 | return dev->devt == (dev_t) (unsigned long) data; |
9f8b17e6 | 956 | } |
4592bf5a | 957 | |
61ad04a8 | 958 | static struct usb_device *usbdev_lookup_by_devt(dev_t devt) |
9f8b17e6 KS |
959 | { |
960 | struct device *dev; | |
961 | ||
a80d5ff0 DH |
962 | dev = bus_find_device(&usb_bus_type, NULL, |
963 | (void *) (unsigned long) devt, match_devt); | |
9f8b17e6 KS |
964 | if (!dev) |
965 | return NULL; | |
69ab55d7 | 966 | return to_usb_device(dev); |
9f8b17e6 | 967 | } |
4592bf5a | 968 | |
1da177e4 LT |
969 | /* |
970 | * file operations | |
971 | */ | |
972 | static int usbdev_open(struct inode *inode, struct file *file) | |
973 | { | |
fbf82fd2 | 974 | struct usb_device *dev = NULL; |
9b6f0c4b | 975 | struct usb_dev_state *ps; |
1da177e4 LT |
976 | int ret; |
977 | ||
1da177e4 | 978 | ret = -ENOMEM; |
d883f52e | 979 | ps = kzalloc(sizeof(struct usb_dev_state), GFP_KERNEL); |
04e482ff | 980 | if (!ps) |
62e299e6 | 981 | goto out_free_ps; |
1da177e4 | 982 | |
01105a24 | 983 | ret = -ENODEV; |
61ad04a8 | 984 | |
62e299e6 AS |
985 | /* Protect against simultaneous removal or release */ |
986 | mutex_lock(&usbfs_mutex); | |
987 | ||
9f8b17e6 | 988 | /* usbdev device-node */ |
fbf82fd2 | 989 | if (imajor(inode) == USB_DEVICE_MAJOR) |
61ad04a8 | 990 | dev = usbdev_lookup_by_devt(inode->i_rdev); |
62e299e6 | 991 | |
62e299e6 AS |
992 | mutex_unlock(&usbfs_mutex); |
993 | ||
994 | if (!dev) | |
995 | goto out_free_ps; | |
996 | ||
997 | usb_lock_device(dev); | |
998 | if (dev->state == USB_STATE_NOTATTACHED) | |
999 | goto out_unlock_device; | |
1000 | ||
94fcda1f | 1001 | ret = usb_autoresume_device(dev); |
01d883d4 | 1002 | if (ret) |
62e299e6 | 1003 | goto out_unlock_device; |
01d883d4 | 1004 | |
1da177e4 LT |
1005 | ps->dev = dev; |
1006 | ps->file = file; | |
d883f52e | 1007 | ps->interface_allowed_mask = 0xFFFFFFFF; /* 32 bits */ |
1da177e4 | 1008 | spin_lock_init(&ps->lock); |
316547fd | 1009 | INIT_LIST_HEAD(&ps->list); |
1da177e4 LT |
1010 | INIT_LIST_HEAD(&ps->async_pending); |
1011 | INIT_LIST_HEAD(&ps->async_completed); | |
f7d34b44 | 1012 | INIT_LIST_HEAD(&ps->memory_list); |
1da177e4 | 1013 | init_waitqueue_head(&ps->wait); |
2425c08b | 1014 | ps->disc_pid = get_pid(task_pid(current)); |
d178bc3a | 1015 | ps->cred = get_current_cred(); |
7a01955f | 1016 | security_task_getsecid(current, &ps->secid); |
527660a8 | 1017 | smp_wmb(); |
1da177e4 LT |
1018 | list_add_tail(&ps->list, &dev->filelist); |
1019 | file->private_data = ps; | |
62e299e6 | 1020 | usb_unlock_device(dev); |
2da41d5f AS |
1021 | snoop(&dev->dev, "opened by process %d: %s\n", task_pid_nr(current), |
1022 | current->comm); | |
62e299e6 AS |
1023 | return ret; |
1024 | ||
1025 | out_unlock_device: | |
1026 | usb_unlock_device(dev); | |
1027 | usb_put_dev(dev); | |
1028 | out_free_ps: | |
1029 | kfree(ps); | |
4a2a8a2c | 1030 | return ret; |
1da177e4 LT |
1031 | } |
1032 | ||
1033 | static int usbdev_release(struct inode *inode, struct file *file) | |
1034 | { | |
9b6f0c4b | 1035 | struct usb_dev_state *ps = file->private_data; |
1da177e4 LT |
1036 | struct usb_device *dev = ps->dev; |
1037 | unsigned int ifnum; | |
6ff10464 | 1038 | struct async *as; |
1da177e4 LT |
1039 | |
1040 | usb_lock_device(dev); | |
7cbe5dca | 1041 | usb_hub_release_all_ports(dev, ps); |
4a2a8a2c | 1042 | |
1da177e4 | 1043 | list_del_init(&ps->list); |
4a2a8a2c | 1044 | |
1da177e4 LT |
1045 | for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed); |
1046 | ifnum++) { | |
1047 | if (test_bit(ifnum, &ps->ifclaimed)) | |
1048 | releaseintf(ps, ifnum); | |
1049 | } | |
1050 | destroy_all_async(ps); | |
94fcda1f | 1051 | usb_autosuspend_device(dev); |
1da177e4 LT |
1052 | usb_unlock_device(dev); |
1053 | usb_put_dev(dev); | |
2425c08b | 1054 | put_pid(ps->disc_pid); |
d178bc3a | 1055 | put_cred(ps->cred); |
6ff10464 AS |
1056 | |
1057 | as = async_getcompleted(ps); | |
1058 | while (as) { | |
1059 | free_async(as); | |
1060 | as = async_getcompleted(ps); | |
1061 | } | |
f7d34b44 | 1062 | |
1da177e4 | 1063 | kfree(ps); |
4a2a8a2c | 1064 | return 0; |
1da177e4 LT |
1065 | } |
1066 | ||
9b6f0c4b | 1067 | static int proc_control(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
1068 | { |
1069 | struct usb_device *dev = ps->dev; | |
1070 | struct usbdevfs_ctrltransfer ctrl; | |
1071 | unsigned int tmo; | |
1072 | unsigned char *tbuf; | |
ff66e3ce | 1073 | unsigned wLength; |
4c6e8971 | 1074 | int i, pipe, ret; |
1da177e4 LT |
1075 | |
1076 | if (copy_from_user(&ctrl, arg, sizeof(ctrl))) | |
1077 | return -EFAULT; | |
393cbb51 MD |
1078 | ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.bRequest, |
1079 | ctrl.wIndex); | |
04e482ff | 1080 | if (ret) |
1da177e4 | 1081 | return ret; |
ff66e3ce AM |
1082 | wLength = ctrl.wLength; /* To suppress 64k PAGE_SIZE warning */ |
1083 | if (wLength > PAGE_SIZE) | |
1da177e4 | 1084 | return -EINVAL; |
add1aaea AS |
1085 | ret = usbfs_increase_memory_usage(PAGE_SIZE + sizeof(struct urb) + |
1086 | sizeof(struct usb_ctrlrequest)); | |
1087 | if (ret) | |
1088 | return ret; | |
04e482ff | 1089 | tbuf = (unsigned char *)__get_free_page(GFP_KERNEL); |
add1aaea AS |
1090 | if (!tbuf) { |
1091 | ret = -ENOMEM; | |
1092 | goto done; | |
1093 | } | |
1da177e4 | 1094 | tmo = ctrl.timeout; |
0880aef4 CF |
1095 | snoop(&dev->dev, "control urb: bRequestType=%02x " |
1096 | "bRequest=%02x wValue=%04x " | |
1097 | "wIndex=%04x wLength=%04x\n", | |
c8f2efc8 XR |
1098 | ctrl.bRequestType, ctrl.bRequest, ctrl.wValue, |
1099 | ctrl.wIndex, ctrl.wLength); | |
1da177e4 | 1100 | if (ctrl.bRequestType & 0x80) { |
04e482ff GKH |
1101 | if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data, |
1102 | ctrl.wLength)) { | |
52fb743d AS |
1103 | ret = -EINVAL; |
1104 | goto done; | |
1da177e4 | 1105 | } |
4c6e8971 | 1106 | pipe = usb_rcvctrlpipe(dev, 0); |
0880aef4 | 1107 | snoop_urb(dev, NULL, pipe, ctrl.wLength, tmo, SUBMIT, NULL, 0); |
1da177e4 LT |
1108 | |
1109 | usb_unlock_device(dev); | |
4c6e8971 | 1110 | i = usb_control_msg(dev, pipe, ctrl.bRequest, |
04e482ff GKH |
1111 | ctrl.bRequestType, ctrl.wValue, ctrl.wIndex, |
1112 | tbuf, ctrl.wLength, tmo); | |
1da177e4 | 1113 | usb_lock_device(dev); |
0880aef4 | 1114 | snoop_urb(dev, NULL, pipe, max(i, 0), min(i, 0), COMPLETE, |
9d02b426 | 1115 | tbuf, max(i, 0)); |
1da177e4 | 1116 | if ((i > 0) && ctrl.wLength) { |
fe0410c7 | 1117 | if (copy_to_user(ctrl.data, tbuf, i)) { |
52fb743d AS |
1118 | ret = -EFAULT; |
1119 | goto done; | |
1da177e4 LT |
1120 | } |
1121 | } | |
1122 | } else { | |
1123 | if (ctrl.wLength) { | |
1124 | if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) { | |
52fb743d AS |
1125 | ret = -EFAULT; |
1126 | goto done; | |
1da177e4 LT |
1127 | } |
1128 | } | |
4c6e8971 | 1129 | pipe = usb_sndctrlpipe(dev, 0); |
0880aef4 CF |
1130 | snoop_urb(dev, NULL, pipe, ctrl.wLength, tmo, SUBMIT, |
1131 | tbuf, ctrl.wLength); | |
4c6e8971 | 1132 | |
1da177e4 | 1133 | usb_unlock_device(dev); |
04e482ff GKH |
1134 | i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest, |
1135 | ctrl.bRequestType, ctrl.wValue, ctrl.wIndex, | |
1136 | tbuf, ctrl.wLength, tmo); | |
1da177e4 | 1137 | usb_lock_device(dev); |
0880aef4 | 1138 | snoop_urb(dev, NULL, pipe, max(i, 0), min(i, 0), COMPLETE, NULL, 0); |
1da177e4 | 1139 | } |
04e482ff | 1140 | if (i < 0 && i != -EPIPE) { |
1da177e4 LT |
1141 | dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL " |
1142 | "failed cmd %s rqt %u rq %u len %u ret %d\n", | |
1143 | current->comm, ctrl.bRequestType, ctrl.bRequest, | |
1144 | ctrl.wLength, i); | |
1145 | } | |
52fb743d AS |
1146 | ret = i; |
1147 | done: | |
1148 | free_page((unsigned long) tbuf); | |
add1aaea AS |
1149 | usbfs_decrease_memory_usage(PAGE_SIZE + sizeof(struct urb) + |
1150 | sizeof(struct usb_ctrlrequest)); | |
52fb743d | 1151 | return ret; |
1da177e4 LT |
1152 | } |
1153 | ||
9b6f0c4b | 1154 | static int proc_bulk(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
1155 | { |
1156 | struct usb_device *dev = ps->dev; | |
1157 | struct usbdevfs_bulktransfer bulk; | |
1158 | unsigned int tmo, len1, pipe; | |
1159 | int len2; | |
1160 | unsigned char *tbuf; | |
4c6e8971 | 1161 | int i, ret; |
1da177e4 LT |
1162 | |
1163 | if (copy_from_user(&bulk, arg, sizeof(bulk))) | |
1164 | return -EFAULT; | |
04e482ff GKH |
1165 | ret = findintfep(ps->dev, bulk.ep); |
1166 | if (ret < 0) | |
1da177e4 | 1167 | return ret; |
04e482ff GKH |
1168 | ret = checkintf(ps, ret); |
1169 | if (ret) | |
1da177e4 LT |
1170 | return ret; |
1171 | if (bulk.ep & USB_DIR_IN) | |
1172 | pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f); | |
1173 | else | |
1174 | pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f); | |
1175 | if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN))) | |
1176 | return -EINVAL; | |
1177 | len1 = bulk.len; | |
1129d270 | 1178 | if (len1 >= (INT_MAX - sizeof(struct urb))) |
1da177e4 | 1179 | return -EINVAL; |
add1aaea AS |
1180 | ret = usbfs_increase_memory_usage(len1 + sizeof(struct urb)); |
1181 | if (ret) | |
1182 | return ret; | |
135551ea KB |
1183 | tbuf = kmalloc(len1, GFP_KERNEL); |
1184 | if (!tbuf) { | |
add1aaea AS |
1185 | ret = -ENOMEM; |
1186 | goto done; | |
1187 | } | |
1da177e4 LT |
1188 | tmo = bulk.timeout; |
1189 | if (bulk.ep & 0x80) { | |
1190 | if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) { | |
52fb743d AS |
1191 | ret = -EINVAL; |
1192 | goto done; | |
1da177e4 | 1193 | } |
0880aef4 | 1194 | snoop_urb(dev, NULL, pipe, len1, tmo, SUBMIT, NULL, 0); |
4c6e8971 | 1195 | |
1da177e4 LT |
1196 | usb_unlock_device(dev); |
1197 | i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo); | |
1198 | usb_lock_device(dev); | |
0880aef4 | 1199 | snoop_urb(dev, NULL, pipe, len2, i, COMPLETE, tbuf, len2); |
4c6e8971 | 1200 | |
1da177e4 LT |
1201 | if (!i && len2) { |
1202 | if (copy_to_user(bulk.data, tbuf, len2)) { | |
52fb743d AS |
1203 | ret = -EFAULT; |
1204 | goto done; | |
1da177e4 LT |
1205 | } |
1206 | } | |
1207 | } else { | |
1208 | if (len1) { | |
1209 | if (copy_from_user(tbuf, bulk.data, len1)) { | |
52fb743d AS |
1210 | ret = -EFAULT; |
1211 | goto done; | |
1da177e4 LT |
1212 | } |
1213 | } | |
0880aef4 | 1214 | snoop_urb(dev, NULL, pipe, len1, tmo, SUBMIT, tbuf, len1); |
4c6e8971 | 1215 | |
1da177e4 LT |
1216 | usb_unlock_device(dev); |
1217 | i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo); | |
1218 | usb_lock_device(dev); | |
0880aef4 | 1219 | snoop_urb(dev, NULL, pipe, len2, i, COMPLETE, NULL, 0); |
1da177e4 | 1220 | } |
52fb743d AS |
1221 | ret = (i < 0 ? i : len2); |
1222 | done: | |
1da177e4 | 1223 | kfree(tbuf); |
add1aaea | 1224 | usbfs_decrease_memory_usage(len1 + sizeof(struct urb)); |
52fb743d | 1225 | return ret; |
1da177e4 LT |
1226 | } |
1227 | ||
f080a51b AS |
1228 | static void check_reset_of_active_ep(struct usb_device *udev, |
1229 | unsigned int epnum, char *ioctl_name) | |
1230 | { | |
1231 | struct usb_host_endpoint **eps; | |
1232 | struct usb_host_endpoint *ep; | |
1233 | ||
1234 | eps = (epnum & USB_DIR_IN) ? udev->ep_in : udev->ep_out; | |
1235 | ep = eps[epnum & 0x0f]; | |
1236 | if (ep && !list_empty(&ep->urb_list)) | |
1237 | dev_warn(&udev->dev, "Process %d (%s) called USBDEVFS_%s for active endpoint 0x%02x\n", | |
1238 | task_pid_nr(current), current->comm, | |
1239 | ioctl_name, epnum); | |
1240 | } | |
1241 | ||
9b6f0c4b | 1242 | static int proc_resetep(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
1243 | { |
1244 | unsigned int ep; | |
1245 | int ret; | |
1246 | ||
1247 | if (get_user(ep, (unsigned int __user *)arg)) | |
1248 | return -EFAULT; | |
04e482ff GKH |
1249 | ret = findintfep(ps->dev, ep); |
1250 | if (ret < 0) | |
1da177e4 | 1251 | return ret; |
04e482ff GKH |
1252 | ret = checkintf(ps, ret); |
1253 | if (ret) | |
1da177e4 | 1254 | return ret; |
f080a51b | 1255 | check_reset_of_active_ep(ps->dev, ep, "RESETEP"); |
3444b26a | 1256 | usb_reset_endpoint(ps->dev, ep); |
1da177e4 LT |
1257 | return 0; |
1258 | } | |
1259 | ||
9b6f0c4b | 1260 | static int proc_clearhalt(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
1261 | { |
1262 | unsigned int ep; | |
1263 | int pipe; | |
1264 | int ret; | |
1265 | ||
1266 | if (get_user(ep, (unsigned int __user *)arg)) | |
1267 | return -EFAULT; | |
04e482ff GKH |
1268 | ret = findintfep(ps->dev, ep); |
1269 | if (ret < 0) | |
1da177e4 | 1270 | return ret; |
04e482ff GKH |
1271 | ret = checkintf(ps, ret); |
1272 | if (ret) | |
1da177e4 | 1273 | return ret; |
f080a51b | 1274 | check_reset_of_active_ep(ps->dev, ep, "CLEAR_HALT"); |
1da177e4 | 1275 | if (ep & USB_DIR_IN) |
04e482ff GKH |
1276 | pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f); |
1277 | else | |
1278 | pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f); | |
1da177e4 LT |
1279 | |
1280 | return usb_clear_halt(ps->dev, pipe); | |
1281 | } | |
1da177e4 | 1282 | |
9b6f0c4b | 1283 | static int proc_getdriver(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
1284 | { |
1285 | struct usbdevfs_getdriver gd; | |
1286 | struct usb_interface *intf; | |
1287 | int ret; | |
1288 | ||
1289 | if (copy_from_user(&gd, arg, sizeof(gd))) | |
1290 | return -EFAULT; | |
1da177e4 LT |
1291 | intf = usb_ifnum_to_if(ps->dev, gd.interface); |
1292 | if (!intf || !intf->dev.driver) | |
1293 | ret = -ENODATA; | |
1294 | else { | |
b11b2e1b | 1295 | strlcpy(gd.driver, intf->dev.driver->name, |
1da177e4 LT |
1296 | sizeof(gd.driver)); |
1297 | ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0); | |
1298 | } | |
1da177e4 LT |
1299 | return ret; |
1300 | } | |
1301 | ||
9b6f0c4b | 1302 | static int proc_connectinfo(struct usb_dev_state *ps, void __user *arg) |
1da177e4 | 1303 | { |
681fef83 KL |
1304 | struct usbdevfs_connectinfo ci; |
1305 | ||
1306 | memset(&ci, 0, sizeof(ci)); | |
1307 | ci.devnum = ps->dev->devnum; | |
1308 | ci.slow = ps->dev->speed == USB_SPEED_LOW; | |
1da177e4 | 1309 | |
1da177e4 LT |
1310 | if (copy_to_user(arg, &ci, sizeof(ci))) |
1311 | return -EFAULT; | |
1312 | return 0; | |
1313 | } | |
1314 | ||
9b6f0c4b | 1315 | static int proc_resetdevice(struct usb_dev_state *ps) |
1da177e4 | 1316 | { |
d883f52e RG |
1317 | struct usb_host_config *actconfig = ps->dev->actconfig; |
1318 | struct usb_interface *interface; | |
1319 | int i, number; | |
1320 | ||
1321 | /* Don't allow a device reset if the process has dropped the | |
1322 | * privilege to do such things and any of the interfaces are | |
1323 | * currently claimed. | |
1324 | */ | |
1325 | if (ps->privileges_dropped && actconfig) { | |
1326 | for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) { | |
1327 | interface = actconfig->interface[i]; | |
1328 | number = interface->cur_altsetting->desc.bInterfaceNumber; | |
1329 | if (usb_interface_claimed(interface) && | |
1330 | !test_bit(number, &ps->ifclaimed)) { | |
1331 | dev_warn(&ps->dev->dev, | |
1332 | "usbfs: interface %d claimed by %s while '%s' resets device\n", | |
1333 | number, interface->dev.driver->name, current->comm); | |
1334 | return -EACCES; | |
1335 | } | |
1336 | } | |
1337 | } | |
1338 | ||
742120c6 | 1339 | return usb_reset_device(ps->dev); |
1da177e4 LT |
1340 | } |
1341 | ||
9b6f0c4b | 1342 | static int proc_setintf(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
1343 | { |
1344 | struct usbdevfs_setinterface setintf; | |
1345 | int ret; | |
1346 | ||
1347 | if (copy_from_user(&setintf, arg, sizeof(setintf))) | |
1348 | return -EFAULT; | |
135551ea KB |
1349 | ret = checkintf(ps, setintf.interface); |
1350 | if (ret) | |
1da177e4 | 1351 | return ret; |
5ec9c177 HG |
1352 | |
1353 | destroy_async_on_interface(ps, setintf.interface); | |
1354 | ||
1da177e4 LT |
1355 | return usb_set_interface(ps->dev, setintf.interface, |
1356 | setintf.altsetting); | |
1357 | } | |
1358 | ||
9b6f0c4b | 1359 | static int proc_setconfig(struct usb_dev_state *ps, void __user *arg) |
1da177e4 | 1360 | { |
3f141e2a | 1361 | int u; |
1da177e4 | 1362 | int status = 0; |
04e482ff | 1363 | struct usb_host_config *actconfig; |
1da177e4 | 1364 | |
3f141e2a | 1365 | if (get_user(u, (int __user *)arg)) |
1da177e4 LT |
1366 | return -EFAULT; |
1367 | ||
04e482ff GKH |
1368 | actconfig = ps->dev->actconfig; |
1369 | ||
1370 | /* Don't touch the device if any interfaces are claimed. | |
1371 | * It could interfere with other drivers' operations, and if | |
1da177e4 LT |
1372 | * an interface is claimed by usbfs it could easily deadlock. |
1373 | */ | |
04e482ff GKH |
1374 | if (actconfig) { |
1375 | int i; | |
1376 | ||
1377 | for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) { | |
1378 | if (usb_interface_claimed(actconfig->interface[i])) { | |
1379 | dev_warn(&ps->dev->dev, | |
72ebddb5 | 1380 | "usbfs: interface %d claimed by %s " |
1da177e4 LT |
1381 | "while '%s' sets config #%d\n", |
1382 | actconfig->interface[i] | |
1383 | ->cur_altsetting | |
1384 | ->desc.bInterfaceNumber, | |
72ebddb5 DB |
1385 | actconfig->interface[i] |
1386 | ->dev.driver->name, | |
1da177e4 | 1387 | current->comm, u); |
04e482ff | 1388 | status = -EBUSY; |
1da177e4 | 1389 | break; |
1da177e4 | 1390 | } |
04e482ff GKH |
1391 | } |
1392 | } | |
1da177e4 LT |
1393 | |
1394 | /* SET_CONFIGURATION is often abused as a "cheap" driver reset, | |
1395 | * so avoid usb_set_configuration()'s kick to sysfs | |
1396 | */ | |
1397 | if (status == 0) { | |
1398 | if (actconfig && actconfig->desc.bConfigurationValue == u) | |
1399 | status = usb_reset_configuration(ps->dev); | |
1400 | else | |
1401 | status = usb_set_configuration(ps->dev, u); | |
1402 | } | |
1403 | ||
1404 | return status; | |
1405 | } | |
1406 | ||
f7d34b44 SG |
1407 | static struct usb_memory * |
1408 | find_memory_area(struct usb_dev_state *ps, const struct usbdevfs_urb *uurb) | |
1409 | { | |
1410 | struct usb_memory *usbm = NULL, *iter; | |
1411 | unsigned long flags; | |
1412 | unsigned long uurb_start = (unsigned long)uurb->buffer; | |
1413 | ||
1414 | spin_lock_irqsave(&ps->lock, flags); | |
1415 | list_for_each_entry(iter, &ps->memory_list, memlist) { | |
1416 | if (uurb_start >= iter->vm_start && | |
1417 | uurb_start < iter->vm_start + iter->size) { | |
1418 | if (uurb->buffer_length > iter->vm_start + iter->size - | |
1419 | uurb_start) { | |
1420 | usbm = ERR_PTR(-EINVAL); | |
1421 | } else { | |
1422 | usbm = iter; | |
1423 | usbm->urb_use_count++; | |
1424 | } | |
1425 | break; | |
1426 | } | |
1427 | } | |
1428 | spin_unlock_irqrestore(&ps->lock, flags); | |
1429 | return usbm; | |
1430 | } | |
1431 | ||
9b6f0c4b | 1432 | static int proc_do_submiturb(struct usb_dev_state *ps, struct usbdevfs_urb *uurb, |
04e482ff GKH |
1433 | struct usbdevfs_iso_packet_desc __user *iso_frame_desc, |
1434 | void __user *arg) | |
1da177e4 LT |
1435 | { |
1436 | struct usbdevfs_iso_packet_desc *isopkt = NULL; | |
1437 | struct usb_host_endpoint *ep; | |
52fb743d | 1438 | struct async *as = NULL; |
1da177e4 LT |
1439 | struct usb_ctrlrequest *dr = NULL; |
1440 | unsigned int u, totlen, isofrmlen; | |
3d97ff63 | 1441 | int i, ret, is_in, num_sgs = 0, ifnum = -1; |
b2d03eb5 | 1442 | int number_of_packets = 0; |
948cd8c1 | 1443 | unsigned int stream_id = 0; |
3d97ff63 | 1444 | void *buf; |
446f666d | 1445 | unsigned long mask = USBDEVFS_URB_SHORT_NOT_OK | |
01c6460f | 1446 | USBDEVFS_URB_BULK_CONTINUATION | |
14722ef4 AS |
1447 | USBDEVFS_URB_NO_FSBR | |
1448 | USBDEVFS_URB_ZERO_PACKET | | |
446f666d ON |
1449 | USBDEVFS_URB_NO_INTERRUPT; |
1450 | /* USBDEVFS_URB_ISO_ASAP is a special case */ | |
1451 | if (uurb->type == USBDEVFS_URB_TYPE_ISO) | |
1452 | mask |= USBDEVFS_URB_ISO_ASAP; | |
1453 | ||
1454 | if (uurb->flags & ~mask) | |
1455 | return -EINVAL; | |
1456 | ||
57999d11 DC |
1457 | if ((unsigned int)uurb->buffer_length >= USBFS_XFER_MAX) |
1458 | return -EINVAL; | |
9180135b | 1459 | if (uurb->buffer_length > 0 && !uurb->buffer) |
1da177e4 | 1460 | return -EINVAL; |
04e482ff GKH |
1461 | if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL && |
1462 | (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) { | |
1463 | ifnum = findintfep(ps->dev, uurb->endpoint); | |
1464 | if (ifnum < 0) | |
1da177e4 | 1465 | return ifnum; |
04e482ff GKH |
1466 | ret = checkintf(ps, ifnum); |
1467 | if (ret) | |
1da177e4 LT |
1468 | return ret; |
1469 | } | |
2fec32b0 | 1470 | ep = ep_to_host_endpoint(ps->dev, uurb->endpoint); |
1da177e4 LT |
1471 | if (!ep) |
1472 | return -ENOENT; | |
2fec32b0 | 1473 | is_in = (uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0; |
add1aaea AS |
1474 | |
1475 | u = 0; | |
f355e830 | 1476 | switch (uurb->type) { |
1da177e4 | 1477 | case USBDEVFS_URB_TYPE_CONTROL: |
93cf9b90 | 1478 | if (!usb_endpoint_xfer_control(&ep->desc)) |
1da177e4 | 1479 | return -EINVAL; |
add1aaea AS |
1480 | /* min 8 byte setup packet */ |
1481 | if (uurb->buffer_length < 8) | |
1da177e4 | 1482 | return -EINVAL; |
04e482ff GKH |
1483 | dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL); |
1484 | if (!dr) | |
1da177e4 LT |
1485 | return -ENOMEM; |
1486 | if (copy_from_user(dr, uurb->buffer, 8)) { | |
52fb743d AS |
1487 | ret = -EFAULT; |
1488 | goto error; | |
1da177e4 LT |
1489 | } |
1490 | if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) { | |
52fb743d AS |
1491 | ret = -EINVAL; |
1492 | goto error; | |
1da177e4 | 1493 | } |
393cbb51 | 1494 | ret = check_ctrlrecip(ps, dr->bRequestType, dr->bRequest, |
04e482ff | 1495 | le16_to_cpup(&dr->wIndex)); |
52fb743d AS |
1496 | if (ret) |
1497 | goto error; | |
1da177e4 LT |
1498 | uurb->buffer_length = le16_to_cpup(&dr->wLength); |
1499 | uurb->buffer += 8; | |
93cf9b90 AS |
1500 | if ((dr->bRequestType & USB_DIR_IN) && uurb->buffer_length) { |
1501 | is_in = 1; | |
1502 | uurb->endpoint |= USB_DIR_IN; | |
1503 | } else { | |
1504 | is_in = 0; | |
1505 | uurb->endpoint &= ~USB_DIR_IN; | |
1506 | } | |
0880aef4 CF |
1507 | snoop(&ps->dev->dev, "control urb: bRequestType=%02x " |
1508 | "bRequest=%02x wValue=%04x " | |
1509 | "wIndex=%04x wLength=%04x\n", | |
1510 | dr->bRequestType, dr->bRequest, | |
1511 | __le16_to_cpup(&dr->wValue), | |
1512 | __le16_to_cpup(&dr->wIndex), | |
1513 | __le16_to_cpup(&dr->wLength)); | |
add1aaea | 1514 | u = sizeof(struct usb_ctrlrequest); |
1da177e4 LT |
1515 | break; |
1516 | ||
1517 | case USBDEVFS_URB_TYPE_BULK: | |
93cf9b90 | 1518 | switch (usb_endpoint_type(&ep->desc)) { |
1da177e4 LT |
1519 | case USB_ENDPOINT_XFER_CONTROL: |
1520 | case USB_ENDPOINT_XFER_ISOC: | |
1521 | return -EINVAL; | |
f661c6f8 AS |
1522 | case USB_ENDPOINT_XFER_INT: |
1523 | /* allow single-shot interrupt transfers */ | |
1524 | uurb->type = USBDEVFS_URB_TYPE_INTERRUPT; | |
1525 | goto interrupt_urb; | |
1da177e4 | 1526 | } |
3d97ff63 HG |
1527 | num_sgs = DIV_ROUND_UP(uurb->buffer_length, USB_SG_SIZE); |
1528 | if (num_sgs == 1 || num_sgs > ps->dev->bus->sg_tablesize) | |
1529 | num_sgs = 0; | |
948cd8c1 HG |
1530 | if (ep->streams) |
1531 | stream_id = uurb->stream_id; | |
1da177e4 LT |
1532 | break; |
1533 | ||
f661c6f8 AS |
1534 | case USBDEVFS_URB_TYPE_INTERRUPT: |
1535 | if (!usb_endpoint_xfer_int(&ep->desc)) | |
1536 | return -EINVAL; | |
1537 | interrupt_urb: | |
f661c6f8 AS |
1538 | break; |
1539 | ||
1da177e4 LT |
1540 | case USBDEVFS_URB_TYPE_ISO: |
1541 | /* arbitrary limit */ | |
04e482ff GKH |
1542 | if (uurb->number_of_packets < 1 || |
1543 | uurb->number_of_packets > 128) | |
1da177e4 | 1544 | return -EINVAL; |
93cf9b90 | 1545 | if (!usb_endpoint_xfer_isoc(&ep->desc)) |
1da177e4 | 1546 | return -EINVAL; |
b2d03eb5 | 1547 | number_of_packets = uurb->number_of_packets; |
04e482ff | 1548 | isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * |
b2d03eb5 | 1549 | number_of_packets; |
73a02d32 RP |
1550 | isopkt = memdup_user(iso_frame_desc, isofrmlen); |
1551 | if (IS_ERR(isopkt)) { | |
1552 | ret = PTR_ERR(isopkt); | |
1553 | isopkt = NULL; | |
52fb743d | 1554 | goto error; |
1da177e4 | 1555 | } |
b2d03eb5 | 1556 | for (totlen = u = 0; u < number_of_packets; u++) { |
e2e2f0ea FM |
1557 | /* |
1558 | * arbitrary limit need for USB 3.0 | |
1559 | * bMaxBurst (0~15 allowed, 1~16 packets) | |
1560 | * bmAttributes (bit 1:0, mult 0~2, 1~3 packets) | |
1561 | * sizemax: 1024 * 16 * 3 = 49152 | |
1562 | */ | |
1563 | if (isopkt[u].length > 49152) { | |
52fb743d AS |
1564 | ret = -EINVAL; |
1565 | goto error; | |
1da177e4 LT |
1566 | } |
1567 | totlen += isopkt[u].length; | |
1568 | } | |
add1aaea | 1569 | u *= sizeof(struct usb_iso_packet_descriptor); |
845d584f | 1570 | uurb->buffer_length = totlen; |
1da177e4 LT |
1571 | break; |
1572 | ||
1da177e4 LT |
1573 | default: |
1574 | return -EINVAL; | |
1575 | } | |
add1aaea | 1576 | |
9180135b AS |
1577 | if (uurb->buffer_length > 0 && |
1578 | !access_ok(is_in ? VERIFY_WRITE : VERIFY_READ, | |
1579 | uurb->buffer, uurb->buffer_length)) { | |
52fb743d AS |
1580 | ret = -EFAULT; |
1581 | goto error; | |
1da177e4 | 1582 | } |
b2d03eb5 | 1583 | as = alloc_async(number_of_packets); |
9180135b | 1584 | if (!as) { |
52fb743d AS |
1585 | ret = -ENOMEM; |
1586 | goto error; | |
1da177e4 | 1587 | } |
3d97ff63 | 1588 | |
f7d34b44 SG |
1589 | as->usbm = find_memory_area(ps, uurb); |
1590 | if (IS_ERR(as->usbm)) { | |
1591 | ret = PTR_ERR(as->usbm); | |
1592 | as->usbm = NULL; | |
1593 | goto error; | |
1594 | } | |
1595 | ||
1596 | /* do not use SG buffers when memory mapped segments | |
1597 | * are in use | |
1598 | */ | |
1599 | if (as->usbm) | |
1600 | num_sgs = 0; | |
1601 | ||
3d97ff63 HG |
1602 | u += sizeof(struct async) + sizeof(struct urb) + uurb->buffer_length + |
1603 | num_sgs * sizeof(struct scatterlist); | |
add1aaea AS |
1604 | ret = usbfs_increase_memory_usage(u); |
1605 | if (ret) | |
1606 | goto error; | |
1607 | as->mem_usage = u; | |
1608 | ||
3d97ff63 HG |
1609 | if (num_sgs) { |
1610 | as->urb->sg = kmalloc(num_sgs * sizeof(struct scatterlist), | |
1611 | GFP_KERNEL); | |
1612 | if (!as->urb->sg) { | |
1613 | ret = -ENOMEM; | |
1614 | goto error; | |
1615 | } | |
1616 | as->urb->num_sgs = num_sgs; | |
1617 | sg_init_table(as->urb->sg, as->urb->num_sgs); | |
1618 | ||
1619 | totlen = uurb->buffer_length; | |
1620 | for (i = 0; i < as->urb->num_sgs; i++) { | |
1621 | u = (totlen > USB_SG_SIZE) ? USB_SG_SIZE : totlen; | |
1622 | buf = kmalloc(u, GFP_KERNEL); | |
1623 | if (!buf) { | |
1624 | ret = -ENOMEM; | |
1625 | goto error; | |
1626 | } | |
1627 | sg_set_buf(&as->urb->sg[i], buf, u); | |
1628 | ||
1629 | if (!is_in) { | |
1630 | if (copy_from_user(buf, uurb->buffer, u)) { | |
1631 | ret = -EFAULT; | |
1632 | goto error; | |
1633 | } | |
01463900 | 1634 | uurb->buffer += u; |
3d97ff63 HG |
1635 | } |
1636 | totlen -= u; | |
1637 | } | |
1638 | } else if (uurb->buffer_length > 0) { | |
f7d34b44 SG |
1639 | if (as->usbm) { |
1640 | unsigned long uurb_start = (unsigned long)uurb->buffer; | |
3d97ff63 | 1641 | |
f7d34b44 SG |
1642 | as->urb->transfer_buffer = as->usbm->mem + |
1643 | (uurb_start - as->usbm->vm_start); | |
1644 | } else { | |
1645 | as->urb->transfer_buffer = kmalloc(uurb->buffer_length, | |
1646 | GFP_KERNEL); | |
1647 | if (!as->urb->transfer_buffer) { | |
1648 | ret = -ENOMEM; | |
3d97ff63 HG |
1649 | goto error; |
1650 | } | |
f7d34b44 SG |
1651 | if (!is_in) { |
1652 | if (copy_from_user(as->urb->transfer_buffer, | |
1653 | uurb->buffer, | |
1654 | uurb->buffer_length)) { | |
1655 | ret = -EFAULT; | |
1656 | goto error; | |
1657 | } | |
1658 | } else if (uurb->type == USBDEVFS_URB_TYPE_ISO) { | |
1659 | /* | |
1660 | * Isochronous input data may end up being | |
1661 | * discontiguous if some of the packets are | |
1662 | * short. Clear the buffer so that the gaps | |
1663 | * don't leak kernel data to userspace. | |
1664 | */ | |
1665 | memset(as->urb->transfer_buffer, 0, | |
1666 | uurb->buffer_length); | |
1667 | } | |
3d97ff63 | 1668 | } |
9180135b | 1669 | } |
04e482ff GKH |
1670 | as->urb->dev = ps->dev; |
1671 | as->urb->pipe = (uurb->type << 30) | | |
93cf9b90 AS |
1672 | __create_pipe(ps->dev, uurb->endpoint & 0xf) | |
1673 | (uurb->endpoint & USB_DIR_IN); | |
14722ef4 AS |
1674 | |
1675 | /* This tedious sequence is necessary because the URB_* flags | |
1676 | * are internal to the kernel and subject to change, whereas | |
1677 | * the USBDEVFS_URB_* flags are a user API and must not be changed. | |
1678 | */ | |
1679 | u = (is_in ? URB_DIR_IN : URB_DIR_OUT); | |
1680 | if (uurb->flags & USBDEVFS_URB_ISO_ASAP) | |
1681 | u |= URB_ISO_ASAP; | |
d310d05f | 1682 | if (uurb->flags & USBDEVFS_URB_SHORT_NOT_OK && is_in) |
14722ef4 AS |
1683 | u |= URB_SHORT_NOT_OK; |
1684 | if (uurb->flags & USBDEVFS_URB_NO_FSBR) | |
1685 | u |= URB_NO_FSBR; | |
1686 | if (uurb->flags & USBDEVFS_URB_ZERO_PACKET) | |
1687 | u |= URB_ZERO_PACKET; | |
1688 | if (uurb->flags & USBDEVFS_URB_NO_INTERRUPT) | |
1689 | u |= URB_NO_INTERRUPT; | |
1690 | as->urb->transfer_flags = u; | |
1691 | ||
1da177e4 | 1692 | as->urb->transfer_buffer_length = uurb->buffer_length; |
04e482ff | 1693 | as->urb->setup_packet = (unsigned char *)dr; |
52fb743d | 1694 | dr = NULL; |
1da177e4 | 1695 | as->urb->start_frame = uurb->start_frame; |
b2d03eb5 | 1696 | as->urb->number_of_packets = number_of_packets; |
948cd8c1 | 1697 | as->urb->stream_id = stream_id; |
53e5f36f AS |
1698 | |
1699 | if (ep->desc.bInterval) { | |
1700 | if (uurb->type == USBDEVFS_URB_TYPE_ISO || | |
1701 | ps->dev->speed == USB_SPEED_HIGH || | |
1702 | ps->dev->speed >= USB_SPEED_SUPER) | |
1703 | as->urb->interval = 1 << | |
1704 | min(15, ep->desc.bInterval - 1); | |
1705 | else | |
1706 | as->urb->interval = ep->desc.bInterval; | |
1707 | } | |
1708 | ||
04e482ff GKH |
1709 | as->urb->context = as; |
1710 | as->urb->complete = async_completed; | |
b2d03eb5 | 1711 | for (totlen = u = 0; u < number_of_packets; u++) { |
1da177e4 LT |
1712 | as->urb->iso_frame_desc[u].offset = totlen; |
1713 | as->urb->iso_frame_desc[u].length = isopkt[u].length; | |
1714 | totlen += isopkt[u].length; | |
1715 | } | |
6fd19f4b | 1716 | kfree(isopkt); |
52fb743d | 1717 | isopkt = NULL; |
1da177e4 | 1718 | as->ps = ps; |
04e482ff | 1719 | as->userurb = arg; |
f7d34b44 SG |
1720 | if (as->usbm) { |
1721 | unsigned long uurb_start = (unsigned long)uurb->buffer; | |
1722 | ||
1723 | as->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
1724 | as->urb->transfer_dma = as->usbm->dma_handle + | |
1725 | (uurb_start - as->usbm->vm_start); | |
1726 | } else if (is_in && uurb->buffer_length > 0) | |
1da177e4 | 1727 | as->userbuffer = uurb->buffer; |
1da177e4 LT |
1728 | as->signr = uurb->signr; |
1729 | as->ifnum = ifnum; | |
2425c08b | 1730 | as->pid = get_pid(task_pid(current)); |
d178bc3a | 1731 | as->cred = get_current_cred(); |
7a01955f | 1732 | security_task_getsecid(current, &as->secid); |
4c6e8971 | 1733 | snoop_urb(ps->dev, as->userurb, as->urb->pipe, |
0880aef4 | 1734 | as->urb->transfer_buffer_length, 0, SUBMIT, |
3d97ff63 HG |
1735 | NULL, 0); |
1736 | if (!is_in) | |
1737 | snoop_urb_data(as->urb, as->urb->transfer_buffer_length); | |
1738 | ||
04e482ff | 1739 | async_newpending(as); |
01c6460f AS |
1740 | |
1741 | if (usb_endpoint_xfer_bulk(&ep->desc)) { | |
1742 | spin_lock_irq(&ps->lock); | |
1743 | ||
1744 | /* Not exactly the endpoint address; the direction bit is | |
1745 | * shifted to the 0x10 position so that the value will be | |
1746 | * between 0 and 31. | |
1747 | */ | |
1748 | as->bulk_addr = usb_endpoint_num(&ep->desc) | | |
1749 | ((ep->desc.bEndpointAddress & USB_ENDPOINT_DIR_MASK) | |
1750 | >> 3); | |
1751 | ||
1752 | /* If this bulk URB is the start of a new transfer, re-enable | |
1753 | * the endpoint. Otherwise mark it as a continuation URB. | |
1754 | */ | |
1755 | if (uurb->flags & USBDEVFS_URB_BULK_CONTINUATION) | |
1756 | as->bulk_status = AS_CONTINUATION; | |
1757 | else | |
1758 | ps->disabled_bulk_eps &= ~(1 << as->bulk_addr); | |
1759 | ||
1760 | /* Don't accept continuation URBs if the endpoint is | |
1761 | * disabled because of an earlier error. | |
1762 | */ | |
1763 | if (ps->disabled_bulk_eps & (1 << as->bulk_addr)) | |
1764 | ret = -EREMOTEIO; | |
1765 | else | |
1766 | ret = usb_submit_urb(as->urb, GFP_ATOMIC); | |
1767 | spin_unlock_irq(&ps->lock); | |
1768 | } else { | |
1769 | ret = usb_submit_urb(as->urb, GFP_KERNEL); | |
1770 | } | |
1771 | ||
1772 | if (ret) { | |
04e482ff GKH |
1773 | dev_printk(KERN_DEBUG, &ps->dev->dev, |
1774 | "usbfs: usb_submit_urb returned %d\n", ret); | |
4c6e8971 | 1775 | snoop_urb(ps->dev, as->userurb, as->urb->pipe, |
0880aef4 | 1776 | 0, ret, COMPLETE, NULL, 0); |
04e482ff | 1777 | async_removepending(as); |
52fb743d | 1778 | goto error; |
04e482ff GKH |
1779 | } |
1780 | return 0; | |
52fb743d AS |
1781 | |
1782 | error: | |
f7d34b44 SG |
1783 | if (as && as->usbm) |
1784 | dec_usb_memory_use_count(as->usbm, &as->usbm->urb_use_count); | |
52fb743d AS |
1785 | kfree(isopkt); |
1786 | kfree(dr); | |
1787 | if (as) | |
1788 | free_async(as); | |
1789 | return ret; | |
1da177e4 LT |
1790 | } |
1791 | ||
9b6f0c4b | 1792 | static int proc_submiturb(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
1793 | { |
1794 | struct usbdevfs_urb uurb; | |
1795 | ||
1796 | if (copy_from_user(&uurb, arg, sizeof(uurb))) | |
1797 | return -EFAULT; | |
1798 | ||
04e482ff GKH |
1799 | return proc_do_submiturb(ps, &uurb, |
1800 | (((struct usbdevfs_urb __user *)arg)->iso_frame_desc), | |
1801 | arg); | |
1da177e4 LT |
1802 | } |
1803 | ||
9b6f0c4b | 1804 | static int proc_unlinkurb(struct usb_dev_state *ps, void __user *arg) |
1da177e4 | 1805 | { |
4e09dcf2 | 1806 | struct urb *urb; |
1da177e4 | 1807 | struct async *as; |
4e09dcf2 | 1808 | unsigned long flags; |
1da177e4 | 1809 | |
4e09dcf2 | 1810 | spin_lock_irqsave(&ps->lock, flags); |
1da177e4 | 1811 | as = async_getpending(ps, arg); |
4e09dcf2 HL |
1812 | if (!as) { |
1813 | spin_unlock_irqrestore(&ps->lock, flags); | |
1da177e4 | 1814 | return -EINVAL; |
4e09dcf2 HL |
1815 | } |
1816 | ||
1817 | urb = as->urb; | |
1818 | usb_get_urb(urb); | |
1819 | spin_unlock_irqrestore(&ps->lock, flags); | |
1820 | ||
1821 | usb_kill_urb(urb); | |
1822 | usb_put_urb(urb); | |
1823 | ||
1da177e4 LT |
1824 | return 0; |
1825 | } | |
1826 | ||
2ef47001 AS |
1827 | static void compute_isochronous_actual_length(struct urb *urb) |
1828 | { | |
1829 | unsigned int i; | |
1830 | ||
1831 | if (urb->number_of_packets > 0) { | |
1832 | urb->actual_length = 0; | |
1833 | for (i = 0; i < urb->number_of_packets; i++) | |
1834 | urb->actual_length += | |
1835 | urb->iso_frame_desc[i].actual_length; | |
1836 | } | |
1837 | } | |
1838 | ||
1da177e4 LT |
1839 | static int processcompl(struct async *as, void __user * __user *arg) |
1840 | { | |
1841 | struct urb *urb = as->urb; | |
1842 | struct usbdevfs_urb __user *userurb = as->userurb; | |
1843 | void __user *addr = as->userurb; | |
1844 | unsigned int i; | |
1845 | ||
2ef47001 | 1846 | compute_isochronous_actual_length(urb); |
7152b592 | 1847 | if (as->userbuffer && urb->actual_length) { |
3d97ff63 | 1848 | if (copy_urb_data_to_user(as->userbuffer, urb)) |
d794a021 | 1849 | goto err_out; |
7152b592 | 1850 | } |
e015268d | 1851 | if (put_user(as->status, &userurb->status)) |
d794a021 | 1852 | goto err_out; |
1da177e4 | 1853 | if (put_user(urb->actual_length, &userurb->actual_length)) |
d794a021 | 1854 | goto err_out; |
1da177e4 | 1855 | if (put_user(urb->error_count, &userurb->error_count)) |
d794a021 | 1856 | goto err_out; |
1da177e4 | 1857 | |
93cf9b90 | 1858 | if (usb_endpoint_xfer_isoc(&urb->ep->desc)) { |
668a9541 CL |
1859 | for (i = 0; i < urb->number_of_packets; i++) { |
1860 | if (put_user(urb->iso_frame_desc[i].actual_length, | |
1861 | &userurb->iso_frame_desc[i].actual_length)) | |
d794a021 | 1862 | goto err_out; |
668a9541 CL |
1863 | if (put_user(urb->iso_frame_desc[i].status, |
1864 | &userurb->iso_frame_desc[i].status)) | |
d794a021 | 1865 | goto err_out; |
668a9541 | 1866 | } |
1da177e4 LT |
1867 | } |
1868 | ||
1da177e4 LT |
1869 | if (put_user(addr, (void __user * __user *)arg)) |
1870 | return -EFAULT; | |
1871 | return 0; | |
d794a021 ON |
1872 | |
1873 | err_out: | |
d794a021 | 1874 | return -EFAULT; |
1da177e4 LT |
1875 | } |
1876 | ||
9b6f0c4b | 1877 | static struct async *reap_as(struct usb_dev_state *ps) |
1da177e4 | 1878 | { |
04e482ff | 1879 | DECLARE_WAITQUEUE(wait, current); |
1da177e4 LT |
1880 | struct async *as = NULL; |
1881 | struct usb_device *dev = ps->dev; | |
1882 | ||
1883 | add_wait_queue(&ps->wait, &wait); | |
1884 | for (;;) { | |
1885 | __set_current_state(TASK_INTERRUPTIBLE); | |
04e482ff | 1886 | as = async_getcompleted(ps); |
3f2cee73 | 1887 | if (as || !connected(ps)) |
1da177e4 LT |
1888 | break; |
1889 | if (signal_pending(current)) | |
1890 | break; | |
1891 | usb_unlock_device(dev); | |
1892 | schedule(); | |
1893 | usb_lock_device(dev); | |
1894 | } | |
1895 | remove_wait_queue(&ps->wait, &wait); | |
1896 | set_current_state(TASK_RUNNING); | |
1897 | return as; | |
1898 | } | |
1899 | ||
9b6f0c4b | 1900 | static int proc_reapurb(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
1901 | { |
1902 | struct async *as = reap_as(ps); | |
a016a816 | 1903 | |
ddeee0b2 | 1904 | if (as) { |
a016a816 AS |
1905 | int retval; |
1906 | ||
2f964780 | 1907 | snoop(&ps->dev->dev, "reap %pK\n", as->userurb); |
a016a816 | 1908 | retval = processcompl(as, (void __user * __user *)arg); |
ddeee0b2 LT |
1909 | free_async(as); |
1910 | return retval; | |
1911 | } | |
1da177e4 LT |
1912 | if (signal_pending(current)) |
1913 | return -EINTR; | |
3f2cee73 | 1914 | return -ENODEV; |
1da177e4 LT |
1915 | } |
1916 | ||
9b6f0c4b | 1917 | static int proc_reapurbnonblock(struct usb_dev_state *ps, void __user *arg) |
1da177e4 | 1918 | { |
ddeee0b2 | 1919 | int retval; |
1da177e4 LT |
1920 | struct async *as; |
1921 | ||
ddeee0b2 | 1922 | as = async_getcompleted(ps); |
ddeee0b2 | 1923 | if (as) { |
2f964780 | 1924 | snoop(&ps->dev->dev, "reap %pK\n", as->userurb); |
ddeee0b2 LT |
1925 | retval = processcompl(as, (void __user * __user *)arg); |
1926 | free_async(as); | |
3f2cee73 AS |
1927 | } else { |
1928 | retval = (connected(ps) ? -EAGAIN : -ENODEV); | |
ddeee0b2 LT |
1929 | } |
1930 | return retval; | |
1da177e4 LT |
1931 | } |
1932 | ||
1933 | #ifdef CONFIG_COMPAT | |
9b6f0c4b | 1934 | static int proc_control_compat(struct usb_dev_state *ps, |
637e8a60 AB |
1935 | struct usbdevfs_ctrltransfer32 __user *p32) |
1936 | { | |
5b32c385 MB |
1937 | struct usbdevfs_ctrltransfer __user *p; |
1938 | __u32 udata; | |
1939 | p = compat_alloc_user_space(sizeof(*p)); | |
1940 | if (copy_in_user(p, p32, (sizeof(*p32) - sizeof(compat_caddr_t))) || | |
1941 | get_user(udata, &p32->data) || | |
637e8a60 AB |
1942 | put_user(compat_ptr(udata), &p->data)) |
1943 | return -EFAULT; | |
5b32c385 | 1944 | return proc_control(ps, p); |
637e8a60 AB |
1945 | } |
1946 | ||
9b6f0c4b | 1947 | static int proc_bulk_compat(struct usb_dev_state *ps, |
637e8a60 AB |
1948 | struct usbdevfs_bulktransfer32 __user *p32) |
1949 | { | |
06793f2d MB |
1950 | struct usbdevfs_bulktransfer __user *p; |
1951 | compat_uint_t n; | |
1952 | compat_caddr_t addr; | |
637e8a60 | 1953 | |
06793f2d | 1954 | p = compat_alloc_user_space(sizeof(*p)); |
637e8a60 | 1955 | |
06793f2d MB |
1956 | if (get_user(n, &p32->ep) || put_user(n, &p->ep) || |
1957 | get_user(n, &p32->len) || put_user(n, &p->len) || | |
1958 | get_user(n, &p32->timeout) || put_user(n, &p->timeout) || | |
1959 | get_user(addr, &p32->data) || put_user(compat_ptr(addr), &p->data)) | |
1960 | return -EFAULT; | |
637e8a60 | 1961 | |
06793f2d | 1962 | return proc_bulk(ps, p); |
637e8a60 | 1963 | } |
9b6f0c4b | 1964 | static int proc_disconnectsignal_compat(struct usb_dev_state *ps, void __user *arg) |
637e8a60 AB |
1965 | { |
1966 | struct usbdevfs_disconnectsignal32 ds; | |
1967 | ||
1968 | if (copy_from_user(&ds, arg, sizeof(ds))) | |
1969 | return -EFAULT; | |
1970 | ps->discsignr = ds.signr; | |
1971 | ps->disccontext = compat_ptr(ds.context); | |
1972 | return 0; | |
1973 | } | |
1da177e4 LT |
1974 | |
1975 | static int get_urb32(struct usbdevfs_urb *kurb, | |
1976 | struct usbdevfs_urb32 __user *uurb) | |
1977 | { | |
cc1a7c4b AV |
1978 | struct usbdevfs_urb32 urb32; |
1979 | if (copy_from_user(&urb32, uurb, sizeof(*uurb))) | |
1da177e4 | 1980 | return -EFAULT; |
cc1a7c4b AV |
1981 | kurb->type = urb32.type; |
1982 | kurb->endpoint = urb32.endpoint; | |
1983 | kurb->status = urb32.status; | |
1984 | kurb->flags = urb32.flags; | |
1985 | kurb->buffer = compat_ptr(urb32.buffer); | |
1986 | kurb->buffer_length = urb32.buffer_length; | |
1987 | kurb->actual_length = urb32.actual_length; | |
1988 | kurb->start_frame = urb32.start_frame; | |
1989 | kurb->number_of_packets = urb32.number_of_packets; | |
1990 | kurb->error_count = urb32.error_count; | |
1991 | kurb->signr = urb32.signr; | |
1992 | kurb->usercontext = compat_ptr(urb32.usercontext); | |
1da177e4 LT |
1993 | return 0; |
1994 | } | |
1995 | ||
9b6f0c4b | 1996 | static int proc_submiturb_compat(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
1997 | { |
1998 | struct usbdevfs_urb uurb; | |
1999 | ||
04e482ff | 2000 | if (get_urb32(&uurb, (struct usbdevfs_urb32 __user *)arg)) |
1da177e4 LT |
2001 | return -EFAULT; |
2002 | ||
04e482ff GKH |
2003 | return proc_do_submiturb(ps, &uurb, |
2004 | ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc, | |
2005 | arg); | |
1da177e4 LT |
2006 | } |
2007 | ||
2008 | static int processcompl_compat(struct async *as, void __user * __user *arg) | |
2009 | { | |
2010 | struct urb *urb = as->urb; | |
2011 | struct usbdevfs_urb32 __user *userurb = as->userurb; | |
2012 | void __user *addr = as->userurb; | |
2013 | unsigned int i; | |
2014 | ||
2ef47001 | 2015 | compute_isochronous_actual_length(urb); |
2102e06a | 2016 | if (as->userbuffer && urb->actual_length) { |
3d97ff63 | 2017 | if (copy_urb_data_to_user(as->userbuffer, urb)) |
1da177e4 | 2018 | return -EFAULT; |
2102e06a | 2019 | } |
e015268d | 2020 | if (put_user(as->status, &userurb->status)) |
1da177e4 LT |
2021 | return -EFAULT; |
2022 | if (put_user(urb->actual_length, &userurb->actual_length)) | |
2023 | return -EFAULT; | |
2024 | if (put_user(urb->error_count, &userurb->error_count)) | |
2025 | return -EFAULT; | |
2026 | ||
93cf9b90 | 2027 | if (usb_endpoint_xfer_isoc(&urb->ep->desc)) { |
668a9541 CL |
2028 | for (i = 0; i < urb->number_of_packets; i++) { |
2029 | if (put_user(urb->iso_frame_desc[i].actual_length, | |
2030 | &userurb->iso_frame_desc[i].actual_length)) | |
2031 | return -EFAULT; | |
2032 | if (put_user(urb->iso_frame_desc[i].status, | |
2033 | &userurb->iso_frame_desc[i].status)) | |
2034 | return -EFAULT; | |
2035 | } | |
1da177e4 LT |
2036 | } |
2037 | ||
c714de5d | 2038 | if (put_user(ptr_to_compat(addr), (u32 __user *)arg)) |
1da177e4 LT |
2039 | return -EFAULT; |
2040 | return 0; | |
2041 | } | |
2042 | ||
9b6f0c4b | 2043 | static int proc_reapurb_compat(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
2044 | { |
2045 | struct async *as = reap_as(ps); | |
a016a816 | 2046 | |
ddeee0b2 | 2047 | if (as) { |
a016a816 AS |
2048 | int retval; |
2049 | ||
2f964780 | 2050 | snoop(&ps->dev->dev, "reap %pK\n", as->userurb); |
a016a816 | 2051 | retval = processcompl_compat(as, (void __user * __user *)arg); |
ddeee0b2 LT |
2052 | free_async(as); |
2053 | return retval; | |
2054 | } | |
1da177e4 LT |
2055 | if (signal_pending(current)) |
2056 | return -EINTR; | |
3f2cee73 | 2057 | return -ENODEV; |
1da177e4 LT |
2058 | } |
2059 | ||
9b6f0c4b | 2060 | static int proc_reapurbnonblock_compat(struct usb_dev_state *ps, void __user *arg) |
1da177e4 | 2061 | { |
ddeee0b2 | 2062 | int retval; |
1da177e4 LT |
2063 | struct async *as; |
2064 | ||
ddeee0b2 LT |
2065 | as = async_getcompleted(ps); |
2066 | if (as) { | |
2f964780 | 2067 | snoop(&ps->dev->dev, "reap %pK\n", as->userurb); |
ddeee0b2 LT |
2068 | retval = processcompl_compat(as, (void __user * __user *)arg); |
2069 | free_async(as); | |
3f2cee73 AS |
2070 | } else { |
2071 | retval = (connected(ps) ? -EAGAIN : -ENODEV); | |
ddeee0b2 LT |
2072 | } |
2073 | return retval; | |
1da177e4 LT |
2074 | } |
2075 | ||
637e8a60 | 2076 | |
1da177e4 LT |
2077 | #endif |
2078 | ||
9b6f0c4b | 2079 | static int proc_disconnectsignal(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
2080 | { |
2081 | struct usbdevfs_disconnectsignal ds; | |
2082 | ||
2083 | if (copy_from_user(&ds, arg, sizeof(ds))) | |
2084 | return -EFAULT; | |
1da177e4 LT |
2085 | ps->discsignr = ds.signr; |
2086 | ps->disccontext = ds.context; | |
2087 | return 0; | |
2088 | } | |
2089 | ||
9b6f0c4b | 2090 | static int proc_claiminterface(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
2091 | { |
2092 | unsigned int ifnum; | |
2093 | ||
2094 | if (get_user(ifnum, (unsigned int __user *)arg)) | |
2095 | return -EFAULT; | |
2096 | return claimintf(ps, ifnum); | |
2097 | } | |
2098 | ||
9b6f0c4b | 2099 | static int proc_releaseinterface(struct usb_dev_state *ps, void __user *arg) |
1da177e4 LT |
2100 | { |
2101 | unsigned int ifnum; | |
2102 | int ret; | |
2103 | ||
2104 | if (get_user(ifnum, (unsigned int __user *)arg)) | |
2105 | return -EFAULT; | |
135551ea KB |
2106 | ret = releaseintf(ps, ifnum); |
2107 | if (ret < 0) | |
1da177e4 | 2108 | return ret; |
64f10edf | 2109 | destroy_async_on_interface(ps, ifnum); |
1da177e4 LT |
2110 | return 0; |
2111 | } | |
2112 | ||
9b6f0c4b | 2113 | static int proc_ioctl(struct usb_dev_state *ps, struct usbdevfs_ioctl *ctl) |
1da177e4 | 2114 | { |
1da177e4 LT |
2115 | int size; |
2116 | void *buf = NULL; | |
2117 | int retval = 0; | |
2118 | struct usb_interface *intf = NULL; | |
2119 | struct usb_driver *driver = NULL; | |
1da177e4 | 2120 | |
d883f52e RG |
2121 | if (ps->privileges_dropped) |
2122 | return -EACCES; | |
2123 | ||
c36fc889 | 2124 | /* alloc buffer */ |
135551ea KB |
2125 | size = _IOC_SIZE(ctl->ioctl_code); |
2126 | if (size > 0) { | |
4baf0df7 Tİ |
2127 | buf = kmalloc(size, GFP_KERNEL); |
2128 | if (buf == NULL) | |
1da177e4 | 2129 | return -ENOMEM; |
c36fc889 | 2130 | if ((_IOC_DIR(ctl->ioctl_code) & _IOC_WRITE)) { |
04e482ff | 2131 | if (copy_from_user(buf, ctl->data, size)) { |
6fd19f4b | 2132 | kfree(buf); |
1da177e4 LT |
2133 | return -EFAULT; |
2134 | } | |
2135 | } else { | |
04e482ff | 2136 | memset(buf, 0, size); |
1da177e4 LT |
2137 | } |
2138 | } | |
2139 | ||
349710c3 | 2140 | if (!connected(ps)) { |
6fd19f4b | 2141 | kfree(buf); |
1da177e4 LT |
2142 | return -ENODEV; |
2143 | } | |
2144 | ||
2145 | if (ps->dev->state != USB_STATE_CONFIGURED) | |
2146 | retval = -EHOSTUNREACH; | |
04e482ff GKH |
2147 | else if (!(intf = usb_ifnum_to_if(ps->dev, ctl->ifno))) |
2148 | retval = -EINVAL; | |
c36fc889 | 2149 | else switch (ctl->ioctl_code) { |
1da177e4 LT |
2150 | |
2151 | /* disconnect kernel driver from interface */ | |
2152 | case USBDEVFS_DISCONNECT: | |
1da177e4 LT |
2153 | if (intf->dev.driver) { |
2154 | driver = to_usb_driver(intf->dev.driver); | |
04e482ff | 2155 | dev_dbg(&intf->dev, "disconnect by usbfs\n"); |
1da177e4 LT |
2156 | usb_driver_release_interface(driver, intf); |
2157 | } else | |
2158 | retval = -ENODATA; | |
1da177e4 LT |
2159 | break; |
2160 | ||
2161 | /* let kernel drivers try to (re)bind to the interface */ | |
2162 | case USBDEVFS_CONNECT: | |
885e9747 AS |
2163 | if (!intf->dev.driver) |
2164 | retval = device_attach(&intf->dev); | |
2165 | else | |
2166 | retval = -EBUSY; | |
1da177e4 LT |
2167 | break; |
2168 | ||
2169 | /* talk directly to the interface's driver */ | |
2170 | default: | |
1da177e4 LT |
2171 | if (intf->dev.driver) |
2172 | driver = to_usb_driver(intf->dev.driver); | |
c532b29a | 2173 | if (driver == NULL || driver->unlocked_ioctl == NULL) { |
1da177e4 LT |
2174 | retval = -ENOTTY; |
2175 | } else { | |
c532b29a | 2176 | retval = driver->unlocked_ioctl(intf, ctl->ioctl_code, buf); |
1da177e4 LT |
2177 | if (retval == -ENOIOCTLCMD) |
2178 | retval = -ENOTTY; | |
2179 | } | |
1da177e4 LT |
2180 | } |
2181 | ||
2182 | /* cleanup and return */ | |
2183 | if (retval >= 0 | |
04e482ff | 2184 | && (_IOC_DIR(ctl->ioctl_code) & _IOC_READ) != 0 |
1da177e4 | 2185 | && size > 0 |
04e482ff | 2186 | && copy_to_user(ctl->data, buf, size) != 0) |
1da177e4 | 2187 | retval = -EFAULT; |
6fd19f4b JJ |
2188 | |
2189 | kfree(buf); | |
1da177e4 LT |
2190 | return retval; |
2191 | } | |
2192 | ||
9b6f0c4b | 2193 | static int proc_ioctl_default(struct usb_dev_state *ps, void __user *arg) |
c36fc889 PZ |
2194 | { |
2195 | struct usbdevfs_ioctl ctrl; | |
2196 | ||
04e482ff | 2197 | if (copy_from_user(&ctrl, arg, sizeof(ctrl))) |
c36fc889 PZ |
2198 | return -EFAULT; |
2199 | return proc_ioctl(ps, &ctrl); | |
2200 | } | |
2201 | ||
2202 | #ifdef CONFIG_COMPAT | |
9b6f0c4b | 2203 | static int proc_ioctl_compat(struct usb_dev_state *ps, compat_uptr_t arg) |
c36fc889 | 2204 | { |
cc1a7c4b | 2205 | struct usbdevfs_ioctl32 ioc32; |
c36fc889 | 2206 | struct usbdevfs_ioctl ctrl; |
c36fc889 | 2207 | |
cc1a7c4b | 2208 | if (copy_from_user(&ioc32, compat_ptr(arg), sizeof(ioc32))) |
c36fc889 | 2209 | return -EFAULT; |
cc1a7c4b AV |
2210 | ctrl.ifno = ioc32.ifno; |
2211 | ctrl.ioctl_code = ioc32.ioctl_code; | |
2212 | ctrl.data = compat_ptr(ioc32.data); | |
c36fc889 PZ |
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: | |
2f964780 | 2492 | snoop(&dev->dev, "%s: DISCARDURB %pK\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; | |
c01b244a AS |
2540 | case USBDEVFS_GET_SPEED: |
2541 | ret = ps->dev->speed; | |
2542 | break; | |
1da177e4 | 2543 | } |
3f2cee73 AS |
2544 | |
2545 | done: | |
1da177e4 LT |
2546 | usb_unlock_device(dev); |
2547 | if (ret >= 0) | |
078cd827 | 2548 | inode->i_atime = current_time(inode); |
1da177e4 LT |
2549 | return ret; |
2550 | } | |
2551 | ||
637e8a60 AB |
2552 | static long usbdev_ioctl(struct file *file, unsigned int cmd, |
2553 | unsigned long arg) | |
2554 | { | |
2555 | int ret; | |
2556 | ||
637e8a60 | 2557 | ret = usbdev_do_ioctl(file, cmd, (void __user *)arg); |
637e8a60 AB |
2558 | |
2559 | return ret; | |
2560 | } | |
2561 | ||
2562 | #ifdef CONFIG_COMPAT | |
2563 | static long usbdev_compat_ioctl(struct file *file, unsigned int cmd, | |
2564 | unsigned long arg) | |
2565 | { | |
2566 | int ret; | |
2567 | ||
637e8a60 | 2568 | ret = usbdev_do_ioctl(file, cmd, compat_ptr(arg)); |
637e8a60 AB |
2569 | |
2570 | return ret; | |
2571 | } | |
2572 | #endif | |
2573 | ||
1da177e4 | 2574 | /* No kernel lock - fine */ |
afc9a42b | 2575 | static __poll_t usbdev_poll(struct file *file, |
04e482ff | 2576 | struct poll_table_struct *wait) |
1da177e4 | 2577 | { |
9b6f0c4b | 2578 | struct usb_dev_state *ps = file->private_data; |
afc9a42b | 2579 | __poll_t mask = 0; |
1da177e4 LT |
2580 | |
2581 | poll_wait(file, &ps->wait, wait); | |
2582 | if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed)) | |
2583 | mask |= POLLOUT | POLLWRNORM; | |
349710c3 | 2584 | if (!connected(ps)) |
5cce4382 AS |
2585 | mask |= POLLHUP; |
2586 | if (list_empty(&ps->list)) | |
2587 | mask |= POLLERR; | |
1da177e4 LT |
2588 | return mask; |
2589 | } | |
2590 | ||
9f8b17e6 | 2591 | const struct file_operations usbdev_file_operations = { |
637e8a60 | 2592 | .owner = THIS_MODULE, |
b25472f9 | 2593 | .llseek = no_seek_end_llseek, |
637e8a60 AB |
2594 | .read = usbdev_read, |
2595 | .poll = usbdev_poll, | |
2596 | .unlocked_ioctl = usbdev_ioctl, | |
2597 | #ifdef CONFIG_COMPAT | |
2598 | .compat_ioctl = usbdev_compat_ioctl, | |
2599 | #endif | |
f7d34b44 | 2600 | .mmap = usbdev_mmap, |
637e8a60 AB |
2601 | .open = usbdev_open, |
2602 | .release = usbdev_release, | |
1da177e4 | 2603 | }; |
fbf82fd2 | 2604 | |
501950d8 | 2605 | static void usbdev_remove(struct usb_device *udev) |
cd9f0375 | 2606 | { |
9b6f0c4b | 2607 | struct usb_dev_state *ps; |
cd9f0375 AS |
2608 | struct siginfo sinfo; |
2609 | ||
2610 | while (!list_empty(&udev->filelist)) { | |
9b6f0c4b | 2611 | ps = list_entry(udev->filelist.next, struct usb_dev_state, list); |
cd9f0375 AS |
2612 | destroy_all_async(ps); |
2613 | wake_up_all(&ps->wait); | |
2614 | list_del_init(&ps->list); | |
2615 | if (ps->discsignr) { | |
3b10db2b | 2616 | clear_siginfo(&sinfo); |
cd9f0375 AS |
2617 | sinfo.si_signo = ps->discsignr; |
2618 | sinfo.si_errno = EPIPE; | |
2619 | sinfo.si_code = SI_ASYNCIO; | |
2620 | sinfo.si_addr = ps->disccontext; | |
d178bc3a SH |
2621 | kill_pid_info_as_cred(ps->discsignr, &sinfo, |
2622 | ps->disc_pid, ps->cred, ps->secid); | |
cd9f0375 AS |
2623 | } |
2624 | } | |
2625 | } | |
2626 | ||
501950d8 | 2627 | static int usbdev_notify(struct notifier_block *self, |
9f8b17e6 | 2628 | unsigned long action, void *dev) |
a7b986b3 GKH |
2629 | { |
2630 | switch (action) { | |
2631 | case USB_DEVICE_ADD: | |
a7b986b3 GKH |
2632 | break; |
2633 | case USB_DEVICE_REMOVE: | |
501950d8 | 2634 | usbdev_remove(dev); |
a7b986b3 GKH |
2635 | break; |
2636 | } | |
2637 | return NOTIFY_OK; | |
2638 | } | |
2639 | ||
2640 | static struct notifier_block usbdev_nb = { | |
00fe52de | 2641 | .notifier_call = usbdev_notify, |
a7b986b3 GKH |
2642 | }; |
2643 | ||
7e7654a9 | 2644 | static struct cdev usb_device_cdev; |
fbf82fd2 | 2645 | |
9f8b17e6 | 2646 | int __init usb_devio_init(void) |
fbf82fd2 KS |
2647 | { |
2648 | int retval; | |
2649 | ||
fad21bdf | 2650 | retval = register_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX, |
04e482ff | 2651 | "usb_device"); |
fbf82fd2 | 2652 | if (retval) { |
69a85942 | 2653 | printk(KERN_ERR "Unable to register minors for usb_device\n"); |
fbf82fd2 KS |
2654 | goto out; |
2655 | } | |
9f8b17e6 | 2656 | cdev_init(&usb_device_cdev, &usbdev_file_operations); |
fad21bdf | 2657 | retval = cdev_add(&usb_device_cdev, USB_DEVICE_DEV, USB_DEVICE_MAX); |
fbf82fd2 | 2658 | if (retval) { |
69a85942 GKH |
2659 | printk(KERN_ERR "Unable to get usb_device major %d\n", |
2660 | USB_DEVICE_MAJOR); | |
a7b986b3 | 2661 | goto error_cdev; |
fbf82fd2 | 2662 | } |
501950d8 | 2663 | usb_register_notify(&usbdev_nb); |
fbf82fd2 KS |
2664 | out: |
2665 | return retval; | |
a7b986b3 | 2666 | |
a7b986b3 GKH |
2667 | error_cdev: |
2668 | unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX); | |
2669 | goto out; | |
fbf82fd2 KS |
2670 | } |
2671 | ||
9f8b17e6 | 2672 | void usb_devio_cleanup(void) |
fbf82fd2 | 2673 | { |
a7b986b3 | 2674 | usb_unregister_notify(&usbdev_nb); |
fbf82fd2 | 2675 | cdev_del(&usb_device_cdev); |
fad21bdf | 2676 | unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX); |
fbf82fd2 | 2677 | } |