diff options
author | Takahiro Hirofuchi <hirofuchi@users.sourceforge.net> | 2008-07-09 16:56:51 -0400 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@suse.de> | 2008-10-10 18:31:08 -0400 |
commit | 05a1f28e879e3b4d6a9c08e30b1898943f77b6e7 (patch) | |
tree | 12d9e45cd655996050620befba1bbeee77798765 /drivers/staging/usbip/usbip_common.c | |
parent | 866b8695d67e83f47194731d3a7ba55826a7ec70 (diff) |
Staging: USB/IP: add common functions needed
This adds the common functions needed by both the host and client side
of the USB/IP code.
Brian Merrell cleaned up a lot of this code and submitted it for
inclusion. Greg also did a lot of cleanup.
Signed-off-by: Brian G. Merrell <bgmerrell@novell.com>
Cc: Takahiro Hirofuchi <hirofuchi@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/staging/usbip/usbip_common.c')
-rw-r--r-- | drivers/staging/usbip/usbip_common.c | 997 |
1 files changed, 997 insertions, 0 deletions
diff --git a/drivers/staging/usbip/usbip_common.c b/drivers/staging/usbip/usbip_common.c new file mode 100644 index 00000000000..e64918f42ff --- /dev/null +++ b/drivers/staging/usbip/usbip_common.c | |||
@@ -0,0 +1,997 @@ | |||
1 | /* | ||
2 | * Copyright (C) 2003-2008 Takahiro Hirofuchi | ||
3 | * | ||
4 | * This is free software; you can redistribute it and/or modify | ||
5 | * it under the terms of the GNU General Public License as published by | ||
6 | * the Free Software Foundation; either version 2 of the License, or | ||
7 | * (at your option) any later version. | ||
8 | * | ||
9 | * This is distributed in the hope that it will be useful, | ||
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
12 | * GNU General Public License for more details. | ||
13 | * | ||
14 | * You should have received a copy of the GNU General Public License | ||
15 | * along with this program; if not, write to the Free Software | ||
16 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, | ||
17 | * USA. | ||
18 | */ | ||
19 | |||
20 | #include <linux/kernel.h> | ||
21 | #include <linux/file.h> | ||
22 | #include <linux/tcp.h> | ||
23 | #include <linux/in.h> | ||
24 | #include "usbip_common.h" | ||
25 | |||
26 | /* version information */ | ||
27 | #define DRIVER_VERSION "1.0" | ||
28 | #define DRIVER_AUTHOR "Takahiro Hirofuchi <hirofuchi _at_ users.sourceforge.net>" | ||
29 | #define DRIVER_DESC "usbip common driver" | ||
30 | |||
31 | /*-------------------------------------------------------------------------*/ | ||
32 | /* debug routines */ | ||
33 | |||
34 | #ifdef CONFIG_USB_DEBUG | ||
35 | unsigned long usbip_debug_flag = 0xffffffff; | ||
36 | #else | ||
37 | unsigned long usbip_debug_flag; | ||
38 | #endif | ||
39 | EXPORT_SYMBOL_GPL(usbip_debug_flag); | ||
40 | |||
41 | |||
42 | /* FIXME */ | ||
43 | struct device_attribute dev_attr_usbip_debug; | ||
44 | EXPORT_SYMBOL_GPL(dev_attr_usbip_debug); | ||
45 | |||
46 | |||
47 | static ssize_t show_flag(struct device *dev, struct device_attribute *attr, | ||
48 | char *buf) | ||
49 | { | ||
50 | return sprintf(buf, "%lx\n", usbip_debug_flag); | ||
51 | } | ||
52 | |||
53 | static ssize_t store_flag(struct device *dev, struct device_attribute *attr, | ||
54 | const char *buf, size_t count) | ||
55 | { | ||
56 | unsigned long flag; | ||
57 | |||
58 | sscanf(buf, "%lx", &flag); | ||
59 | usbip_debug_flag = flag; | ||
60 | |||
61 | return count; | ||
62 | } | ||
63 | DEVICE_ATTR(usbip_debug, (S_IRUGO | S_IWUSR), show_flag, store_flag); | ||
64 | |||
65 | static void usbip_dump_buffer(char *buff, int bufflen) | ||
66 | { | ||
67 | int i; | ||
68 | |||
69 | if (bufflen > 128) { | ||
70 | for (i = 0; i < 128; i++) { | ||
71 | if (i%24 == 0) | ||
72 | printk(" "); | ||
73 | printk("%02x ", (unsigned char) buff[i]); | ||
74 | if (i%4 == 3) | ||
75 | printk("| "); | ||
76 | if (i%24 == 23) | ||
77 | printk("\n"); | ||
78 | } | ||
79 | printk("... (%d byte)\n", bufflen); | ||
80 | return; | ||
81 | } | ||
82 | |||
83 | for (i = 0; i < bufflen; i++) { | ||
84 | if (i%24 == 0) | ||
85 | printk(" "); | ||
86 | printk("%02x ", (unsigned char) buff[i]); | ||
87 | if (i%4 == 3) | ||
88 | printk("| "); | ||
89 | if (i%24 == 23) | ||
90 | printk("\n"); | ||
91 | } | ||
92 | printk("\n"); | ||
93 | |||
94 | } | ||
95 | |||
96 | static void usbip_dump_pipe(unsigned int p) | ||
97 | { | ||
98 | unsigned char type = usb_pipetype(p); | ||
99 | unsigned char ep = usb_pipeendpoint(p); | ||
100 | unsigned char dev = usb_pipedevice(p); | ||
101 | unsigned char dir = usb_pipein(p); | ||
102 | |||
103 | printk("dev(%d) ", dev); | ||
104 | printk("ep(%d) ", ep); | ||
105 | printk("%s ", dir ? "IN" : "OUT"); | ||
106 | |||
107 | switch (type) { | ||
108 | case PIPE_ISOCHRONOUS: | ||
109 | printk("%s ", "ISO"); | ||
110 | break; | ||
111 | case PIPE_INTERRUPT: | ||
112 | printk("%s ", "INT"); | ||
113 | break; | ||
114 | case PIPE_CONTROL: | ||
115 | printk("%s ", "CTL"); | ||
116 | break; | ||
117 | case PIPE_BULK: | ||
118 | printk("%s ", "BLK"); | ||
119 | break; | ||
120 | default: | ||
121 | printk("ERR"); | ||
122 | } | ||
123 | |||
124 | printk("\n"); | ||
125 | |||
126 | } | ||
127 | |||
128 | static void usbip_dump_usb_device(struct usb_device *udev) | ||
129 | { | ||
130 | struct device *dev = &udev->dev; | ||
131 | int i; | ||
132 | |||
133 | dev_dbg(dev, " devnum(%d) devpath(%s)", | ||
134 | udev->devnum, udev->devpath); | ||
135 | |||
136 | switch (udev->speed) { | ||
137 | case USB_SPEED_HIGH: | ||
138 | printk(" SPD_HIGH"); | ||
139 | break; | ||
140 | case USB_SPEED_FULL: | ||
141 | printk(" SPD_FULL"); | ||
142 | break; | ||
143 | case USB_SPEED_LOW: | ||
144 | printk(" SPD_LOW"); | ||
145 | break; | ||
146 | case USB_SPEED_UNKNOWN: | ||
147 | printk(" SPD_UNKNOWN"); | ||
148 | break; | ||
149 | default: | ||
150 | printk(" SPD_ERROR"); | ||
151 | } | ||
152 | |||
153 | printk(" tt %p, ttport %d", udev->tt, udev->ttport); | ||
154 | printk("\n"); | ||
155 | |||
156 | dev_dbg(dev, " "); | ||
157 | for (i = 0; i < 16; i++) | ||
158 | printk(" %2u", i); | ||
159 | printk("\n"); | ||
160 | |||
161 | dev_dbg(dev, " toggle0(IN) :"); | ||
162 | for (i = 0; i < 16; i++) | ||
163 | printk(" %2u", (udev->toggle[0] & (1 << i)) ? 1 : 0); | ||
164 | printk("\n"); | ||
165 | |||
166 | dev_dbg(dev, " toggle1(OUT):"); | ||
167 | for (i = 0; i < 16; i++) | ||
168 | printk(" %2u", (udev->toggle[1] & (1 << i)) ? 1 : 0); | ||
169 | printk("\n"); | ||
170 | |||
171 | |||
172 | dev_dbg(dev, " epmaxp_in :"); | ||
173 | for (i = 0; i < 16; i++) { | ||
174 | if (udev->ep_in[i]) | ||
175 | printk(" %2u", | ||
176 | le16_to_cpu(udev->ep_in[i]->desc.wMaxPacketSize)); | ||
177 | } | ||
178 | printk("\n"); | ||
179 | |||
180 | dev_dbg(dev, " epmaxp_out :"); | ||
181 | for (i = 0; i < 16; i++) { | ||
182 | if (udev->ep_out[i]) | ||
183 | printk(" %2u", | ||
184 | le16_to_cpu(udev->ep_out[i]->desc.wMaxPacketSize)); | ||
185 | } | ||
186 | printk("\n"); | ||
187 | |||
188 | dev_dbg(dev, "parent %p, bus %p\n", udev->parent, udev->bus); | ||
189 | |||
190 | dev_dbg(dev, "descriptor %p, config %p, actconfig %p, " | ||
191 | "rawdescriptors %p\n", &udev->descriptor, udev->config, | ||
192 | udev->actconfig, udev->rawdescriptors); | ||
193 | |||
194 | dev_dbg(dev, "have_langid %d, string_langid %d\n", | ||
195 | udev->have_langid, udev->string_langid); | ||
196 | |||
197 | dev_dbg(dev, "maxchild %d, children %p\n", | ||
198 | udev->maxchild, udev->children); | ||
199 | } | ||
200 | |||
201 | static void usbip_dump_request_type(__u8 rt) | ||
202 | { | ||
203 | switch (rt & USB_RECIP_MASK) { | ||
204 | case USB_RECIP_DEVICE: | ||
205 | printk("DEVICE"); | ||
206 | break; | ||
207 | case USB_RECIP_INTERFACE: | ||
208 | printk("INTERF"); | ||
209 | break; | ||
210 | case USB_RECIP_ENDPOINT: | ||
211 | printk("ENDPOI"); | ||
212 | break; | ||
213 | case USB_RECIP_OTHER: | ||
214 | printk("OTHER "); | ||
215 | break; | ||
216 | default: | ||
217 | printk("------"); | ||
218 | } | ||
219 | } | ||
220 | |||
221 | static void usbip_dump_usb_ctrlrequest(struct usb_ctrlrequest *cmd) | ||
222 | { | ||
223 | if (!cmd) { | ||
224 | printk(" %s : null pointer\n", __FUNCTION__); | ||
225 | return; | ||
226 | } | ||
227 | |||
228 | printk(" "); | ||
229 | printk("bRequestType(%02X) ", cmd->bRequestType); | ||
230 | printk("bRequest(%02X) " , cmd->bRequest); | ||
231 | printk("wValue(%04X) ", cmd->wValue); | ||
232 | printk("wIndex(%04X) ", cmd->wIndex); | ||
233 | printk("wLength(%04X) ", cmd->wLength); | ||
234 | |||
235 | printk("\n "); | ||
236 | |||
237 | if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) { | ||
238 | printk("STANDARD "); | ||
239 | switch (cmd->bRequest) { | ||
240 | case USB_REQ_GET_STATUS: | ||
241 | printk("GET_STATUS"); | ||
242 | break; | ||
243 | case USB_REQ_CLEAR_FEATURE: | ||
244 | printk("CLEAR_FEAT"); | ||
245 | break; | ||
246 | case USB_REQ_SET_FEATURE: | ||
247 | printk("SET_FEAT "); | ||
248 | break; | ||
249 | case USB_REQ_SET_ADDRESS: | ||
250 | printk("SET_ADDRRS"); | ||
251 | break; | ||
252 | case USB_REQ_GET_DESCRIPTOR: | ||
253 | printk("GET_DESCRI"); | ||
254 | break; | ||
255 | case USB_REQ_SET_DESCRIPTOR: | ||
256 | printk("SET_DESCRI"); | ||
257 | break; | ||
258 | case USB_REQ_GET_CONFIGURATION: | ||
259 | printk("GET_CONFIG"); | ||
260 | break; | ||
261 | case USB_REQ_SET_CONFIGURATION: | ||
262 | printk("SET_CONFIG"); | ||
263 | break; | ||
264 | case USB_REQ_GET_INTERFACE: | ||
265 | printk("GET_INTERF"); | ||
266 | break; | ||
267 | case USB_REQ_SET_INTERFACE: | ||
268 | printk("SET_INTERF"); | ||
269 | break; | ||
270 | case USB_REQ_SYNCH_FRAME: | ||
271 | printk("SYNC_FRAME"); | ||
272 | break; | ||
273 | default: | ||
274 | printk("REQ(%02X) ", cmd->bRequest); | ||
275 | } | ||
276 | |||
277 | printk(" "); | ||
278 | usbip_dump_request_type(cmd->bRequestType); | ||
279 | |||
280 | } else if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_CLASS) | ||
281 | printk("CLASS "); | ||
282 | |||
283 | else if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_VENDOR) | ||
284 | printk("VENDOR "); | ||
285 | |||
286 | else if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_RESERVED) | ||
287 | printk("RESERVED"); | ||
288 | |||
289 | printk("\n"); | ||
290 | } | ||
291 | |||
292 | void usbip_dump_urb(struct urb *urb) | ||
293 | { | ||
294 | struct device *dev; | ||
295 | |||
296 | if (!urb) { | ||
297 | printk(KERN_DEBUG KBUILD_MODNAME | ||
298 | ":%s: urb: null pointer!!\n", __func__); | ||
299 | return; | ||
300 | } | ||
301 | |||
302 | if (!urb->dev) { | ||
303 | printk(KERN_DEBUG KBUILD_MODNAME | ||
304 | ":%s: urb->dev: null pointer!!\n", __func__); | ||
305 | return; | ||
306 | } | ||
307 | dev = &urb->dev->dev; | ||
308 | |||
309 | dev_dbg(dev, " urb :%p\n", urb); | ||
310 | dev_dbg(dev, " dev :%p\n", urb->dev); | ||
311 | |||
312 | usbip_dump_usb_device(urb->dev); | ||
313 | |||
314 | dev_dbg(dev, " pipe :%08x ", urb->pipe); | ||
315 | |||
316 | usbip_dump_pipe(urb->pipe); | ||
317 | |||
318 | dev_dbg(dev, " status :%d\n", urb->status); | ||
319 | dev_dbg(dev, " transfer_flags :%08X\n", urb->transfer_flags); | ||
320 | dev_dbg(dev, " transfer_buffer :%p\n", urb->transfer_buffer); | ||
321 | dev_dbg(dev, " transfer_buffer_length:%d\n", urb->transfer_buffer_length); | ||
322 | dev_dbg(dev, " actual_length :%d\n", urb->actual_length); | ||
323 | dev_dbg(dev, " setup_packet :%p\n", urb->setup_packet); | ||
324 | |||
325 | if (urb->setup_packet && usb_pipetype(urb->pipe) == PIPE_CONTROL) | ||
326 | usbip_dump_usb_ctrlrequest( | ||
327 | (struct usb_ctrlrequest *)urb->setup_packet); | ||
328 | |||
329 | dev_dbg(dev, " start_frame :%d\n", urb->start_frame); | ||
330 | dev_dbg(dev, " number_of_packets :%d\n", urb->number_of_packets); | ||
331 | dev_dbg(dev, " interval :%d\n", urb->interval); | ||
332 | dev_dbg(dev, " error_count :%d\n", urb->error_count); | ||
333 | dev_dbg(dev, " context :%p\n", urb->context); | ||
334 | dev_dbg(dev, " complete :%p\n", urb->complete); | ||
335 | } | ||
336 | EXPORT_SYMBOL_GPL(usbip_dump_urb); | ||
337 | |||
338 | void usbip_dump_header(struct usbip_header *pdu) | ||
339 | { | ||
340 | udbg("BASE: cmd %u seq %u devid %u dir %u ep %u\n", | ||
341 | pdu->base.command, | ||
342 | pdu->base.seqnum, | ||
343 | pdu->base.devid, | ||
344 | pdu->base.direction, | ||
345 | pdu->base.ep); | ||
346 | |||
347 | switch (pdu->base.command) { | ||
348 | case USBIP_CMD_SUBMIT: | ||
349 | udbg("CMD_SUBMIT: x_flags %u x_len %u sf %u #p %u iv %u\n", | ||
350 | pdu->u.cmd_submit.transfer_flags, | ||
351 | pdu->u.cmd_submit.transfer_buffer_length, | ||
352 | pdu->u.cmd_submit.start_frame, | ||
353 | pdu->u.cmd_submit.number_of_packets, | ||
354 | pdu->u.cmd_submit.interval); | ||
355 | break; | ||
356 | case USBIP_CMD_UNLINK: | ||
357 | udbg("CMD_UNLINK: seq %u\n", pdu->u.cmd_unlink.seqnum); | ||
358 | break; | ||
359 | case USBIP_RET_SUBMIT: | ||
360 | udbg("RET_SUBMIT: st %d al %u sf %d ec %d\n", | ||
361 | pdu->u.ret_submit.status, | ||
362 | pdu->u.ret_submit.actual_length, | ||
363 | pdu->u.ret_submit.start_frame, | ||
364 | pdu->u.ret_submit.error_count); | ||
365 | case USBIP_RET_UNLINK: | ||
366 | udbg("RET_UNLINK: status %d\n", pdu->u.ret_unlink.status); | ||
367 | break; | ||
368 | default: | ||
369 | /* NOT REACHED */ | ||
370 | udbg("UNKNOWN\n"); | ||
371 | } | ||
372 | } | ||
373 | EXPORT_SYMBOL_GPL(usbip_dump_header); | ||
374 | |||
375 | |||
376 | /*-------------------------------------------------------------------------*/ | ||
377 | /* thread routines */ | ||
378 | |||
379 | int usbip_thread(void *param) | ||
380 | { | ||
381 | struct usbip_task *ut = param; | ||
382 | |||
383 | if (!ut) | ||
384 | return -EINVAL; | ||
385 | |||
386 | lock_kernel(); | ||
387 | daemonize(ut->name); | ||
388 | allow_signal(SIGKILL); | ||
389 | ut->thread = current; | ||
390 | unlock_kernel(); | ||
391 | |||
392 | /* srv.rb must wait for rx_thread starting */ | ||
393 | complete(&ut->thread_done); | ||
394 | |||
395 | /* start of while loop */ | ||
396 | ut->loop_ops(ut); | ||
397 | |||
398 | /* end of loop */ | ||
399 | ut->thread = NULL; | ||
400 | |||
401 | complete_and_exit(&ut->thread_done, 0); | ||
402 | } | ||
403 | |||
404 | void usbip_start_threads(struct usbip_device *ud) | ||
405 | { | ||
406 | /* | ||
407 | * threads are invoked per one device (per one connection). | ||
408 | */ | ||
409 | kernel_thread(usbip_thread, (void *)&ud->tcp_rx, 0); | ||
410 | kernel_thread(usbip_thread, (void *)&ud->tcp_tx, 0); | ||
411 | |||
412 | /* confirm threads are starting */ | ||
413 | wait_for_completion(&ud->tcp_rx.thread_done); | ||
414 | wait_for_completion(&ud->tcp_tx.thread_done); | ||
415 | } | ||
416 | EXPORT_SYMBOL_GPL(usbip_start_threads); | ||
417 | |||
418 | void usbip_stop_threads(struct usbip_device *ud) | ||
419 | { | ||
420 | /* kill threads related to this sdev, if v.c. exists */ | ||
421 | if (ud->tcp_rx.thread != NULL) { | ||
422 | send_sig(SIGKILL, ud->tcp_rx.thread, 1); | ||
423 | wait_for_completion(&ud->tcp_rx.thread_done); | ||
424 | udbg("rx_thread for ud %p has finished\n", ud); | ||
425 | } | ||
426 | |||
427 | if (ud->tcp_tx.thread != NULL) { | ||
428 | send_sig(SIGKILL, ud->tcp_tx.thread, 1); | ||
429 | wait_for_completion(&ud->tcp_tx.thread_done); | ||
430 | udbg("tx_thread for ud %p has finished\n", ud); | ||
431 | } | ||
432 | } | ||
433 | EXPORT_SYMBOL_GPL(usbip_stop_threads); | ||
434 | |||
435 | void usbip_task_init(struct usbip_task *ut, char *name, | ||
436 | void (*loop_ops)(struct usbip_task *)) | ||
437 | { | ||
438 | ut->thread = NULL; | ||
439 | init_completion(&ut->thread_done); | ||
440 | ut->name = name; | ||
441 | ut->loop_ops = loop_ops; | ||
442 | } | ||
443 | EXPORT_SYMBOL_GPL(usbip_task_init); | ||
444 | |||
445 | |||
446 | /*-------------------------------------------------------------------------*/ | ||
447 | /* socket routines */ | ||
448 | |||
449 | /* Send/receive messages over TCP/IP. I refer drivers/block/nbd.c */ | ||
450 | int usbip_xmit(int send, struct socket *sock, char *buf, | ||
451 | int size, int msg_flags) | ||
452 | { | ||
453 | int result; | ||
454 | struct msghdr msg; | ||
455 | struct kvec iov; | ||
456 | int total = 0; | ||
457 | |||
458 | /* for blocks of if (dbg_flag_xmit) */ | ||
459 | char *bp = buf; | ||
460 | int osize = size; | ||
461 | |||
462 | dbg_xmit("enter\n"); | ||
463 | |||
464 | if (!sock || !buf || !size) { | ||
465 | printk(KERN_ERR "%s: invalid arg, sock %p buff %p size %d\n", | ||
466 | __func__, sock, buf, size); | ||
467 | return -EINVAL; | ||
468 | } | ||
469 | |||
470 | |||
471 | if (dbg_flag_xmit) { | ||
472 | if (send) { | ||
473 | if (!in_interrupt()) | ||
474 | printk(KERN_DEBUG "%-10s:", current->comm); | ||
475 | else | ||
476 | printk(KERN_DEBUG "interupt :"); | ||
477 | |||
478 | printk("%s: sending... , sock %p, buf %p, " | ||
479 | "size %d, msg_flags %d\n", __func__, | ||
480 | sock, buf, size, msg_flags); | ||
481 | usbip_dump_buffer(buf, size); | ||
482 | } | ||
483 | } | ||
484 | |||
485 | |||
486 | do { | ||
487 | sock->sk->sk_allocation = GFP_NOIO; | ||
488 | iov.iov_base = buf; | ||
489 | iov.iov_len = size; | ||
490 | msg.msg_name = NULL; | ||
491 | msg.msg_namelen = 0; | ||
492 | msg.msg_control = NULL; | ||
493 | msg.msg_controllen = 0; | ||
494 | msg.msg_namelen = 0; | ||
495 | msg.msg_flags = msg_flags | MSG_NOSIGNAL; | ||
496 | |||
497 | if (send) | ||
498 | result = kernel_sendmsg(sock, &msg, &iov, 1, size); | ||
499 | else | ||
500 | result = kernel_recvmsg(sock, &msg, &iov, 1, size, | ||
501 | MSG_WAITALL); | ||
502 | |||
503 | if (result <= 0) { | ||
504 | udbg("usbip_xmit: %s sock %p buf %p size %u ret %d" | ||
505 | " total %d\n", | ||
506 | send ? "send" : "receive", sock, buf, | ||
507 | size, result, total); | ||
508 | goto err; | ||
509 | } | ||
510 | |||
511 | size -= result; | ||
512 | buf += result; | ||
513 | total += result; | ||
514 | |||
515 | } while (size > 0); | ||
516 | |||
517 | |||
518 | if (dbg_flag_xmit) { | ||
519 | if (!send) { | ||
520 | if (!in_interrupt()) | ||
521 | printk(KERN_DEBUG "%-10s:", current->comm); | ||
522 | else | ||
523 | printk(KERN_DEBUG "interupt :"); | ||
524 | |||
525 | printk("usbip_xmit: receiving....\n"); | ||
526 | usbip_dump_buffer(bp, osize); | ||
527 | printk("usbip_xmit: received, osize %d ret %d size %d " | ||
528 | "total %d\n", osize, result, size, | ||
529 | total); | ||
530 | } | ||
531 | |||
532 | if (send) | ||
533 | printk("usbip_xmit: send, total %d\n", total); | ||
534 | } | ||
535 | |||
536 | return total; | ||
537 | |||
538 | err: | ||
539 | return result; | ||
540 | } | ||
541 | EXPORT_SYMBOL_GPL(usbip_xmit); | ||
542 | |||
543 | |||
544 | /* now a usrland utility should set options. */ | ||
545 | #if 0 | ||
546 | int setquickack(struct socket *socket) | ||
547 | { | ||
548 | mm_segment_t oldfs; | ||
549 | int val = 1; | ||
550 | int ret; | ||
551 | |||
552 | oldfs = get_fs(); | ||
553 | set_fs(get_ds()); | ||
554 | ret = socket->ops->setsockopt(socket, SOL_TCP, TCP_QUICKACK, | ||
555 | (char __user *) &val, sizeof(ret)); | ||
556 | set_fs(oldfs); | ||
557 | |||
558 | return ret; | ||
559 | } | ||
560 | |||
561 | int setnodelay(struct socket *socket) | ||
562 | { | ||
563 | mm_segment_t oldfs; | ||
564 | int val = 1; | ||
565 | int ret; | ||
566 | |||
567 | oldfs = get_fs(); | ||
568 | set_fs(get_ds()); | ||
569 | ret = socket->ops->setsockopt(socket, SOL_TCP, TCP_NODELAY, | ||
570 | (char __user *) &val, sizeof(ret)); | ||
571 | set_fs(oldfs); | ||
572 | |||
573 | return ret; | ||
574 | } | ||
575 | |||
576 | int setkeepalive(struct socket *socket) | ||
577 | { | ||
578 | mm_segment_t oldfs; | ||
579 | int val = 1; | ||
580 | int ret; | ||
581 | |||
582 | oldfs = get_fs(); | ||
583 | set_fs(get_ds()); | ||
584 | ret = socket->ops->setsockopt(socket, SOL_SOCKET, SO_KEEPALIVE, | ||
585 | (char __user *) &val, sizeof(ret)); | ||
586 | set_fs(oldfs); | ||
587 | |||
588 | return ret; | ||
589 | } | ||
590 | |||
591 | void setreuse(struct socket *socket) | ||
592 | { | ||
593 | socket->sk->sk_reuse = 1; | ||
594 | } | ||
595 | #endif | ||
596 | |||
597 | struct socket *sockfd_to_socket(unsigned int sockfd) | ||
598 | { | ||
599 | struct socket *socket; | ||
600 | struct file *file; | ||
601 | struct inode *inode; | ||
602 | |||
603 | file = fget(sockfd); | ||
604 | if (!file) { | ||
605 | printk(KERN_ERR "%s: invalid sockfd\n", __func__); | ||
606 | return NULL; | ||
607 | } | ||
608 | |||
609 | inode = file->f_dentry->d_inode; | ||
610 | |||
611 | if (!inode || !S_ISSOCK(inode->i_mode)) | ||
612 | return NULL; | ||
613 | |||
614 | socket = SOCKET_I(inode); | ||
615 | |||
616 | return socket; | ||
617 | } | ||
618 | EXPORT_SYMBOL_GPL(sockfd_to_socket); | ||
619 | |||
620 | |||
621 | |||
622 | /*-------------------------------------------------------------------------*/ | ||
623 | /* pdu routines */ | ||
624 | |||
625 | /* there may be more cases to tweak the flags. */ | ||
626 | static unsigned int tweak_transfer_flags(unsigned int flags) | ||
627 | { | ||
628 | |||
629 | if (flags & URB_NO_TRANSFER_DMA_MAP) | ||
630 | /* | ||
631 | * vhci_hcd does not provide DMA-mapped I/O. The upper | ||
632 | * driver does not need to set this flag. The remote | ||
633 | * usbip.ko does not still perform DMA-mapped I/O for | ||
634 | * DMA-caplable host controllers. So, clear this flag. | ||
635 | */ | ||
636 | flags &= ~URB_NO_TRANSFER_DMA_MAP; | ||
637 | |||
638 | if (flags & URB_NO_SETUP_DMA_MAP) | ||
639 | flags &= ~URB_NO_SETUP_DMA_MAP; | ||
640 | |||
641 | return flags; | ||
642 | } | ||
643 | |||
644 | static void usbip_pack_cmd_submit(struct usbip_header *pdu, struct urb *urb, | ||
645 | int pack) | ||
646 | { | ||
647 | struct usbip_header_cmd_submit *spdu = &pdu->u.cmd_submit; | ||
648 | |||
649 | /* | ||
650 | * Some members are not still implemented in usbip. I hope this issue | ||
651 | * will be discussed when usbip is ported to other operating systems. | ||
652 | */ | ||
653 | if (pack) { | ||
654 | /* vhci_tx.c */ | ||
655 | spdu->transfer_flags = | ||
656 | tweak_transfer_flags(urb->transfer_flags); | ||
657 | spdu->transfer_buffer_length = urb->transfer_buffer_length; | ||
658 | spdu->start_frame = urb->start_frame; | ||
659 | spdu->number_of_packets = urb->number_of_packets; | ||
660 | spdu->interval = urb->interval; | ||
661 | } else { | ||
662 | /* stub_rx.c */ | ||
663 | urb->transfer_flags = spdu->transfer_flags; | ||
664 | |||
665 | urb->transfer_buffer_length = spdu->transfer_buffer_length; | ||
666 | urb->start_frame = spdu->start_frame; | ||
667 | urb->number_of_packets = spdu->number_of_packets; | ||
668 | urb->interval = spdu->interval; | ||
669 | } | ||
670 | } | ||
671 | |||
672 | static void usbip_pack_ret_submit(struct usbip_header *pdu, struct urb *urb, | ||
673 | int pack) | ||
674 | { | ||
675 | struct usbip_header_ret_submit *rpdu = &pdu->u.ret_submit; | ||
676 | |||
677 | if (pack) { | ||
678 | /* stub_tx.c */ | ||
679 | |||
680 | rpdu->status = urb->status; | ||
681 | rpdu->actual_length = urb->actual_length; | ||
682 | rpdu->start_frame = urb->start_frame; | ||
683 | rpdu->error_count = urb->error_count; | ||
684 | } else { | ||
685 | /* vhci_rx.c */ | ||
686 | |||
687 | urb->status = rpdu->status; | ||
688 | urb->actual_length = rpdu->actual_length; | ||
689 | urb->start_frame = rpdu->start_frame; | ||
690 | urb->error_count = rpdu->error_count; | ||
691 | } | ||
692 | } | ||
693 | |||
694 | |||
695 | void usbip_pack_pdu(struct usbip_header *pdu, struct urb *urb, int cmd, | ||
696 | int pack) | ||
697 | { | ||
698 | switch (cmd) { | ||
699 | case USBIP_CMD_SUBMIT: | ||
700 | usbip_pack_cmd_submit(pdu, urb, pack); | ||
701 | break; | ||
702 | case USBIP_RET_SUBMIT: | ||
703 | usbip_pack_ret_submit(pdu, urb, pack); | ||
704 | break; | ||
705 | default: | ||
706 | err("unknown command"); | ||
707 | /* NOTREACHED */ | ||
708 | /* BUG(); */ | ||
709 | } | ||
710 | } | ||
711 | EXPORT_SYMBOL_GPL(usbip_pack_pdu); | ||
712 | |||
713 | |||
714 | static void correct_endian_basic(struct usbip_header_basic *base, int send) | ||
715 | { | ||
716 | if (send) { | ||
717 | base->command = cpu_to_be32(base->command); | ||
718 | base->seqnum = cpu_to_be32(base->seqnum); | ||
719 | base->devid = cpu_to_be32(base->devid); | ||
720 | base->direction = cpu_to_be32(base->direction); | ||
721 | base->ep = cpu_to_be32(base->ep); | ||
722 | } else { | ||
723 | base->command = be32_to_cpu(base->command); | ||
724 | base->seqnum = be32_to_cpu(base->seqnum); | ||
725 | base->devid = be32_to_cpu(base->devid); | ||
726 | base->direction = be32_to_cpu(base->direction); | ||
727 | base->ep = be32_to_cpu(base->ep); | ||
728 | } | ||
729 | } | ||
730 | |||
731 | static void correct_endian_cmd_submit(struct usbip_header_cmd_submit *pdu, | ||
732 | int send) | ||
733 | { | ||
734 | if (send) { | ||
735 | pdu->transfer_flags = cpu_to_be32(pdu->transfer_flags); | ||
736 | |||
737 | cpu_to_be32s(&pdu->transfer_buffer_length); | ||
738 | cpu_to_be32s(&pdu->start_frame); | ||
739 | cpu_to_be32s(&pdu->number_of_packets); | ||
740 | cpu_to_be32s(&pdu->interval); | ||
741 | } else { | ||
742 | pdu->transfer_flags = be32_to_cpu(pdu->transfer_flags); | ||
743 | |||
744 | be32_to_cpus(&pdu->transfer_buffer_length); | ||
745 | be32_to_cpus(&pdu->start_frame); | ||
746 | be32_to_cpus(&pdu->number_of_packets); | ||
747 | be32_to_cpus(&pdu->interval); | ||
748 | } | ||
749 | } | ||
750 | |||
751 | static void correct_endian_ret_submit(struct usbip_header_ret_submit *pdu, | ||
752 | int send) | ||
753 | { | ||
754 | if (send) { | ||
755 | cpu_to_be32s(&pdu->status); | ||
756 | cpu_to_be32s(&pdu->actual_length); | ||
757 | cpu_to_be32s(&pdu->start_frame); | ||
758 | cpu_to_be32s(&pdu->error_count); | ||
759 | } else { | ||
760 | be32_to_cpus(&pdu->status); | ||
761 | be32_to_cpus(&pdu->actual_length); | ||
762 | be32_to_cpus(&pdu->start_frame); | ||
763 | be32_to_cpus(&pdu->error_count); | ||
764 | } | ||
765 | } | ||
766 | |||
767 | static void correct_endian_cmd_unlink(struct usbip_header_cmd_unlink *pdu, | ||
768 | int send) | ||
769 | { | ||
770 | if (send) | ||
771 | pdu->seqnum = cpu_to_be32(pdu->seqnum); | ||
772 | else | ||
773 | pdu->seqnum = be32_to_cpu(pdu->seqnum); | ||
774 | } | ||
775 | |||
776 | static void correct_endian_ret_unlink(struct usbip_header_ret_unlink *pdu, | ||
777 | int send) | ||
778 | { | ||
779 | if (send) | ||
780 | cpu_to_be32s(&pdu->status); | ||
781 | else | ||
782 | be32_to_cpus(&pdu->status); | ||
783 | } | ||
784 | |||
785 | void usbip_header_correct_endian(struct usbip_header *pdu, int send) | ||
786 | { | ||
787 | __u32 cmd = 0; | ||
788 | |||
789 | if (send) | ||
790 | cmd = pdu->base.command; | ||
791 | |||
792 | correct_endian_basic(&pdu->base, send); | ||
793 | |||
794 | if (!send) | ||
795 | cmd = pdu->base.command; | ||
796 | |||
797 | switch (cmd) { | ||
798 | case USBIP_CMD_SUBMIT: | ||
799 | correct_endian_cmd_submit(&pdu->u.cmd_submit, send); | ||
800 | break; | ||
801 | case USBIP_RET_SUBMIT: | ||
802 | correct_endian_ret_submit(&pdu->u.ret_submit, send); | ||
803 | break; | ||
804 | case USBIP_CMD_UNLINK: | ||
805 | correct_endian_cmd_unlink(&pdu->u.cmd_unlink, send); | ||
806 | break; | ||
807 | case USBIP_RET_UNLINK: | ||
808 | correct_endian_ret_unlink(&pdu->u.ret_unlink, send); | ||
809 | break; | ||
810 | default: | ||
811 | /* NOTREACHED */ | ||
812 | err("unknown command in pdu header: %d", cmd); | ||
813 | /* BUG(); */ | ||
814 | } | ||
815 | } | ||
816 | EXPORT_SYMBOL_GPL(usbip_header_correct_endian); | ||
817 | |||
818 | static void usbip_iso_pakcet_correct_endian( | ||
819 | struct usbip_iso_packet_descriptor *iso, | ||
820 | int send) | ||
821 | { | ||
822 | /* does not need all members. but copy all simply. */ | ||
823 | if (send) { | ||
824 | iso->offset = cpu_to_be32(iso->offset); | ||
825 | iso->length = cpu_to_be32(iso->length); | ||
826 | iso->status = cpu_to_be32(iso->status); | ||
827 | iso->actual_length = cpu_to_be32(iso->actual_length); | ||
828 | } else { | ||
829 | iso->offset = be32_to_cpu(iso->offset); | ||
830 | iso->length = be32_to_cpu(iso->length); | ||
831 | iso->status = be32_to_cpu(iso->status); | ||
832 | iso->actual_length = be32_to_cpu(iso->actual_length); | ||
833 | } | ||
834 | } | ||
835 | |||
836 | static void usbip_pack_iso(struct usbip_iso_packet_descriptor *iso, | ||
837 | struct usb_iso_packet_descriptor *uiso, int pack) | ||
838 | { | ||
839 | if (pack) { | ||
840 | iso->offset = uiso->offset; | ||
841 | iso->length = uiso->length; | ||
842 | iso->status = uiso->status; | ||
843 | iso->actual_length = uiso->actual_length; | ||
844 | } else { | ||
845 | uiso->offset = iso->offset; | ||
846 | uiso->length = iso->length; | ||
847 | uiso->status = iso->status; | ||
848 | uiso->actual_length = iso->actual_length; | ||
849 | } | ||
850 | } | ||
851 | |||
852 | |||
853 | /* must free buffer */ | ||
854 | void *usbip_alloc_iso_desc_pdu(struct urb *urb, ssize_t *bufflen) | ||
855 | { | ||
856 | void *buff; | ||
857 | struct usbip_iso_packet_descriptor *iso; | ||
858 | int np = urb->number_of_packets; | ||
859 | ssize_t size = np * sizeof(*iso); | ||
860 | int i; | ||
861 | |||
862 | buff = kzalloc(size, GFP_KERNEL); | ||
863 | if (!buff) | ||
864 | return NULL; | ||
865 | |||
866 | for (i = 0; i < np; i++) { | ||
867 | iso = buff + (i * sizeof(*iso)); | ||
868 | |||
869 | usbip_pack_iso(iso, &urb->iso_frame_desc[i], 1); | ||
870 | usbip_iso_pakcet_correct_endian(iso, 1); | ||
871 | } | ||
872 | |||
873 | *bufflen = size; | ||
874 | |||
875 | return buff; | ||
876 | } | ||
877 | EXPORT_SYMBOL_GPL(usbip_alloc_iso_desc_pdu); | ||
878 | |||
879 | /* some members of urb must be substituted before. */ | ||
880 | int usbip_recv_iso(struct usbip_device *ud, struct urb *urb) | ||
881 | { | ||
882 | void *buff; | ||
883 | struct usbip_iso_packet_descriptor *iso; | ||
884 | int np = urb->number_of_packets; | ||
885 | int size = np * sizeof(*iso); | ||
886 | int i; | ||
887 | int ret; | ||
888 | |||
889 | if (!usb_pipeisoc(urb->pipe)) | ||
890 | return 0; | ||
891 | |||
892 | /* my Bluetooth dongle gets ISO URBs which are np = 0 */ | ||
893 | if (np == 0) { | ||
894 | /* uinfo("iso np == 0\n"); */ | ||
895 | /* usbip_dump_urb(urb); */ | ||
896 | return 0; | ||
897 | } | ||
898 | |||
899 | buff = kzalloc(size, GFP_KERNEL); | ||
900 | if (!buff) | ||
901 | return -ENOMEM; | ||
902 | |||
903 | ret = usbip_xmit(0, ud->tcp_socket, buff, size, 0); | ||
904 | if (ret != size) { | ||
905 | dev_err(&urb->dev->dev, "recv iso_frame_descriptor, %d\n", | ||
906 | ret); | ||
907 | kfree(buff); | ||
908 | |||
909 | if (ud->side == USBIP_STUB) | ||
910 | usbip_event_add(ud, SDEV_EVENT_ERROR_TCP); | ||
911 | else | ||
912 | usbip_event_add(ud, VDEV_EVENT_ERROR_TCP); | ||
913 | |||
914 | return -EPIPE; | ||
915 | } | ||
916 | |||
917 | for (i = 0; i < np; i++) { | ||
918 | iso = buff + (i * sizeof(*iso)); | ||
919 | |||
920 | usbip_iso_pakcet_correct_endian(iso, 0); | ||
921 | usbip_pack_iso(iso, &urb->iso_frame_desc[i], 0); | ||
922 | } | ||
923 | |||
924 | |||
925 | kfree(buff); | ||
926 | |||
927 | return ret; | ||
928 | } | ||
929 | EXPORT_SYMBOL_GPL(usbip_recv_iso); | ||
930 | |||
931 | |||
932 | /* some members of urb must be substituted before. */ | ||
933 | int usbip_recv_xbuff(struct usbip_device *ud, struct urb *urb) | ||
934 | { | ||
935 | int ret; | ||
936 | int size; | ||
937 | |||
938 | if (ud->side == USBIP_STUB) { | ||
939 | /* stub_rx.c */ | ||
940 | /* the direction of urb must be OUT. */ | ||
941 | if (usb_pipein(urb->pipe)) | ||
942 | return 0; | ||
943 | |||
944 | size = urb->transfer_buffer_length; | ||
945 | } else { | ||
946 | /* vhci_rx.c */ | ||
947 | /* the direction of urb must be IN. */ | ||
948 | if (usb_pipeout(urb->pipe)) | ||
949 | return 0; | ||
950 | |||
951 | size = urb->actual_length; | ||
952 | } | ||
953 | |||
954 | /* no need to recv xbuff */ | ||
955 | if (!(size > 0)) | ||
956 | return 0; | ||
957 | |||
958 | ret = usbip_xmit(0, ud->tcp_socket, (char *)urb->transfer_buffer, | ||
959 | size, 0); | ||
960 | if (ret != size) { | ||
961 | dev_err(&urb->dev->dev, "recv xbuf, %d\n", ret); | ||
962 | if (ud->side == USBIP_STUB) { | ||
963 | usbip_event_add(ud, SDEV_EVENT_ERROR_TCP); | ||
964 | } else { | ||
965 | usbip_event_add(ud, VDEV_EVENT_ERROR_TCP); | ||
966 | return -EPIPE; | ||
967 | } | ||
968 | } | ||
969 | |||
970 | return ret; | ||
971 | } | ||
972 | EXPORT_SYMBOL_GPL(usbip_recv_xbuff); | ||
973 | |||
974 | |||
975 | /*-------------------------------------------------------------------------*/ | ||
976 | |||
977 | static int __init usbip_common_init(void) | ||
978 | { | ||
979 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "" DRIVER_VERSION); | ||
980 | |||
981 | return 0; | ||
982 | } | ||
983 | |||
984 | static void __exit usbip_common_exit(void) | ||
985 | { | ||
986 | return; | ||
987 | } | ||
988 | |||
989 | |||
990 | |||
991 | |||
992 | module_init(usbip_common_init); | ||
993 | module_exit(usbip_common_exit); | ||
994 | |||
995 | MODULE_AUTHOR(DRIVER_AUTHOR); | ||
996 | MODULE_DESCRIPTION(DRIVER_DESC); | ||
997 | MODULE_LICENSE("GPL"); | ||