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20#include <asm/byteorder.h>
21#include <linux/file.h>
22#include <linux/fs.h>
23#include <linux/kernel.h>
24#include <linux/slab.h>
25#include <linux/stat.h>
26#include <linux/module.h>
27#include <linux/moduleparam.h>
28#include <net/sock.h>
29
30#include "usbip_common.h"
31
32#define DRIVER_AUTHOR "Takahiro Hirofuchi <hirofuchi@users.sourceforge.net>"
33#define DRIVER_DESC "USB/IP Core"
34
35#ifdef CONFIG_USBIP_DEBUG
36unsigned long usbip_debug_flag = 0xffffffff;
37#else
38unsigned long usbip_debug_flag;
39#endif
40EXPORT_SYMBOL_GPL(usbip_debug_flag);
41module_param(usbip_debug_flag, ulong, S_IRUGO|S_IWUSR);
42MODULE_PARM_DESC(usbip_debug_flag, "debug flags (defined in usbip_common.h)");
43
44
45struct device_attribute dev_attr_usbip_debug;
46EXPORT_SYMBOL_GPL(dev_attr_usbip_debug);
47
48static ssize_t show_flag(struct device *dev, struct device_attribute *attr,
49 char *buf)
50{
51 return sprintf(buf, "%lx\n", usbip_debug_flag);
52}
53
54static ssize_t store_flag(struct device *dev, struct device_attribute *attr,
55 const char *buf, size_t count)
56{
57 sscanf(buf, "%lx", &usbip_debug_flag);
58 return count;
59}
60DEVICE_ATTR(usbip_debug, (S_IRUGO | S_IWUSR), show_flag, store_flag);
61
62static void usbip_dump_buffer(char *buff, int bufflen)
63{
64 print_hex_dump(KERN_DEBUG, "usbip-core", DUMP_PREFIX_OFFSET, 16, 4,
65 buff, bufflen, false);
66}
67
68static void usbip_dump_pipe(unsigned int p)
69{
70 unsigned char type = usb_pipetype(p);
71 unsigned char ep = usb_pipeendpoint(p);
72 unsigned char dev = usb_pipedevice(p);
73 unsigned char dir = usb_pipein(p);
74
75 pr_debug("dev(%d) ep(%d) [%s] ", dev, ep, dir ? "IN" : "OUT");
76
77 switch (type) {
78 case PIPE_ISOCHRONOUS:
79 pr_debug("ISO\n");
80 break;
81 case PIPE_INTERRUPT:
82 pr_debug("INT\n");
83 break;
84 case PIPE_CONTROL:
85 pr_debug("CTRL\n");
86 break;
87 case PIPE_BULK:
88 pr_debug("BULK\n");
89 break;
90 default:
91 pr_debug("ERR\n");
92 break;
93 }
94}
95
96static void usbip_dump_usb_device(struct usb_device *udev)
97{
98 struct device *dev = &udev->dev;
99 int i;
100
101 dev_dbg(dev, " devnum(%d) devpath(%s) ",
102 udev->devnum, udev->devpath);
103
104 switch (udev->speed) {
105 case USB_SPEED_HIGH:
106 pr_debug("SPD_HIGH ");
107 break;
108 case USB_SPEED_FULL:
109 pr_debug("SPD_FULL ");
110 break;
111 case USB_SPEED_LOW:
112 pr_debug("SPD_LOW ");
113 break;
114 case USB_SPEED_UNKNOWN:
115 pr_debug("SPD_UNKNOWN ");
116 break;
117 default:
118 pr_debug("SPD_ERROR ");
119 break;
120 }
121
122 pr_debug("tt %p, ttport %d\n", udev->tt, udev->ttport);
123
124 dev_dbg(dev, " ");
125 for (i = 0; i < 16; i++)
126 pr_debug(" %2u", i);
127 pr_debug("\n");
128
129 dev_dbg(dev, " toggle0(IN) :");
130 for (i = 0; i < 16; i++)
131 pr_debug(" %2u", (udev->toggle[0] & (1 << i)) ? 1 : 0);
132 pr_debug("\n");
133
134 dev_dbg(dev, " toggle1(OUT):");
135 for (i = 0; i < 16; i++)
136 pr_debug(" %2u", (udev->toggle[1] & (1 << i)) ? 1 : 0);
137 pr_debug("\n");
138
139 dev_dbg(dev, " epmaxp_in :");
140 for (i = 0; i < 16; i++) {
141 if (udev->ep_in[i])
142 pr_debug(" %2u",
143 le16_to_cpu(udev->ep_in[i]->desc.wMaxPacketSize));
144 }
145 pr_debug("\n");
146
147 dev_dbg(dev, " epmaxp_out :");
148 for (i = 0; i < 16; i++) {
149 if (udev->ep_out[i])
150 pr_debug(" %2u",
151 le16_to_cpu(udev->ep_out[i]->desc.wMaxPacketSize));
152 }
153 pr_debug("\n");
154
155 dev_dbg(dev, "parent %p, bus %p\n", udev->parent, udev->bus);
156
157 dev_dbg(dev, "descriptor %p, config %p, actconfig %p, "
158 "rawdescriptors %p\n", &udev->descriptor, udev->config,
159 udev->actconfig, udev->rawdescriptors);
160
161 dev_dbg(dev, "have_langid %d, string_langid %d\n",
162 udev->have_langid, udev->string_langid);
163
164 dev_dbg(dev, "maxchild %d\n", udev->maxchild);
165}
166
167static void usbip_dump_request_type(__u8 rt)
168{
169 switch (rt & USB_RECIP_MASK) {
170 case USB_RECIP_DEVICE:
171 pr_debug("DEVICE");
172 break;
173 case USB_RECIP_INTERFACE:
174 pr_debug("INTERF");
175 break;
176 case USB_RECIP_ENDPOINT:
177 pr_debug("ENDPOI");
178 break;
179 case USB_RECIP_OTHER:
180 pr_debug("OTHER ");
181 break;
182 default:
183 pr_debug("------");
184 break;
185 }
186}
187
188static void usbip_dump_usb_ctrlrequest(struct usb_ctrlrequest *cmd)
189{
190 if (!cmd) {
191 pr_debug(" : null pointer\n");
192 return;
193 }
194
195 pr_debug(" ");
196 pr_debug("bRequestType(%02X) bRequest(%02X) wValue(%04X) wIndex(%04X) "
197 "wLength(%04X) ", cmd->bRequestType, cmd->bRequest,
198 cmd->wValue, cmd->wIndex, cmd->wLength);
199 pr_debug("\n ");
200
201 if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
202 pr_debug("STANDARD ");
203 switch (cmd->bRequest) {
204 case USB_REQ_GET_STATUS:
205 pr_debug("GET_STATUS\n");
206 break;
207 case USB_REQ_CLEAR_FEATURE:
208 pr_debug("CLEAR_FEAT\n");
209 break;
210 case USB_REQ_SET_FEATURE:
211 pr_debug("SET_FEAT\n");
212 break;
213 case USB_REQ_SET_ADDRESS:
214 pr_debug("SET_ADDRRS\n");
215 break;
216 case USB_REQ_GET_DESCRIPTOR:
217 pr_debug("GET_DESCRI\n");
218 break;
219 case USB_REQ_SET_DESCRIPTOR:
220 pr_debug("SET_DESCRI\n");
221 break;
222 case USB_REQ_GET_CONFIGURATION:
223 pr_debug("GET_CONFIG\n");
224 break;
225 case USB_REQ_SET_CONFIGURATION:
226 pr_debug("SET_CONFIG\n");
227 break;
228 case USB_REQ_GET_INTERFACE:
229 pr_debug("GET_INTERF\n");
230 break;
231 case USB_REQ_SET_INTERFACE:
232 pr_debug("SET_INTERF\n");
233 break;
234 case USB_REQ_SYNCH_FRAME:
235 pr_debug("SYNC_FRAME\n");
236 break;
237 default:
238 pr_debug("REQ(%02X)\n", cmd->bRequest);
239 break;
240 }
241 usbip_dump_request_type(cmd->bRequestType);
242 } else if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_CLASS) {
243 pr_debug("CLASS\n");
244 } else if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_VENDOR) {
245 pr_debug("VENDOR\n");
246 } else if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_RESERVED) {
247 pr_debug("RESERVED\n");
248 }
249}
250
251void usbip_dump_urb(struct urb *urb)
252{
253 struct device *dev;
254
255 if (!urb) {
256 pr_debug("urb: null pointer!!\n");
257 return;
258 }
259
260 if (!urb->dev) {
261 pr_debug("urb->dev: null pointer!!\n");
262 return;
263 }
264
265 dev = &urb->dev->dev;
266
267 dev_dbg(dev, " urb :%p\n", urb);
268 dev_dbg(dev, " dev :%p\n", urb->dev);
269
270 usbip_dump_usb_device(urb->dev);
271
272 dev_dbg(dev, " pipe :%08x ", urb->pipe);
273
274 usbip_dump_pipe(urb->pipe);
275
276 dev_dbg(dev, " status :%d\n", urb->status);
277 dev_dbg(dev, " transfer_flags :%08X\n", urb->transfer_flags);
278 dev_dbg(dev, " transfer_buffer :%p\n", urb->transfer_buffer);
279 dev_dbg(dev, " transfer_buffer_length:%d\n",
280 urb->transfer_buffer_length);
281 dev_dbg(dev, " actual_length :%d\n", urb->actual_length);
282 dev_dbg(dev, " setup_packet :%p\n", urb->setup_packet);
283
284 if (urb->setup_packet && usb_pipetype(urb->pipe) == PIPE_CONTROL)
285 usbip_dump_usb_ctrlrequest(
286 (struct usb_ctrlrequest *)urb->setup_packet);
287
288 dev_dbg(dev, " start_frame :%d\n", urb->start_frame);
289 dev_dbg(dev, " number_of_packets :%d\n", urb->number_of_packets);
290 dev_dbg(dev, " interval :%d\n", urb->interval);
291 dev_dbg(dev, " error_count :%d\n", urb->error_count);
292 dev_dbg(dev, " context :%p\n", urb->context);
293 dev_dbg(dev, " complete :%p\n", urb->complete);
294}
295EXPORT_SYMBOL_GPL(usbip_dump_urb);
296
297void usbip_dump_header(struct usbip_header *pdu)
298{
299 pr_debug("BASE: cmd %u seq %u devid %u dir %u ep %u\n",
300 pdu->base.command,
301 pdu->base.seqnum,
302 pdu->base.devid,
303 pdu->base.direction,
304 pdu->base.ep);
305
306 switch (pdu->base.command) {
307 case USBIP_CMD_SUBMIT:
308 pr_debug("USBIP_CMD_SUBMIT: "
309 "x_flags %u x_len %u sf %u #p %d iv %d\n",
310 pdu->u.cmd_submit.transfer_flags,
311 pdu->u.cmd_submit.transfer_buffer_length,
312 pdu->u.cmd_submit.start_frame,
313 pdu->u.cmd_submit.number_of_packets,
314 pdu->u.cmd_submit.interval);
315 break;
316 case USBIP_CMD_UNLINK:
317 pr_debug("USBIP_CMD_UNLINK: seq %u\n",
318 pdu->u.cmd_unlink.seqnum);
319 break;
320 case USBIP_RET_SUBMIT:
321 pr_debug("USBIP_RET_SUBMIT: st %d al %u sf %d #p %d ec %d\n",
322 pdu->u.ret_submit.status,
323 pdu->u.ret_submit.actual_length,
324 pdu->u.ret_submit.start_frame,
325 pdu->u.ret_submit.number_of_packets,
326 pdu->u.ret_submit.error_count);
327 break;
328 case USBIP_RET_UNLINK:
329 pr_debug("USBIP_RET_UNLINK: status %d\n",
330 pdu->u.ret_unlink.status);
331 break;
332 default:
333
334 pr_err("unknown command\n");
335 break;
336 }
337}
338EXPORT_SYMBOL_GPL(usbip_dump_header);
339
340
341int usbip_recv(struct socket *sock, void *buf, int size)
342{
343 int result;
344 struct msghdr msg;
345 struct kvec iov;
346 int total = 0;
347
348
349 char *bp = buf;
350 int osize = size;
351
352 usbip_dbg_xmit("enter\n");
353
354 if (!sock || !buf || !size) {
355 pr_err("invalid arg, sock %p buff %p size %d\n", sock, buf,
356 size);
357 return -EINVAL;
358 }
359
360 do {
361 sock->sk->sk_allocation = GFP_NOIO;
362 iov.iov_base = buf;
363 iov.iov_len = size;
364 msg.msg_name = NULL;
365 msg.msg_namelen = 0;
366 msg.msg_control = NULL;
367 msg.msg_controllen = 0;
368 msg.msg_namelen = 0;
369 msg.msg_flags = MSG_NOSIGNAL;
370
371 result = kernel_recvmsg(sock, &msg, &iov, 1, size, MSG_WAITALL);
372 if (result <= 0) {
373 pr_debug("receive sock %p buf %p size %u ret %d total %d\n",
374 sock, buf, size, result, total);
375 goto err;
376 }
377
378 size -= result;
379 buf += result;
380 total += result;
381 } while (size > 0);
382
383 if (usbip_dbg_flag_xmit) {
384 if (!in_interrupt())
385 pr_debug("%-10s:", current->comm);
386 else
387 pr_debug("interrupt :");
388
389 pr_debug("receiving....\n");
390 usbip_dump_buffer(bp, osize);
391 pr_debug("received, osize %d ret %d size %d total %d\n",
392 osize, result, size, total);
393 }
394
395 return total;
396
397err:
398 return result;
399}
400EXPORT_SYMBOL_GPL(usbip_recv);
401
402struct socket *sockfd_to_socket(unsigned int sockfd)
403{
404 struct socket *socket;
405 struct file *file;
406 struct inode *inode;
407
408 file = fget(sockfd);
409 if (!file) {
410 pr_err("invalid sockfd\n");
411 return NULL;
412 }
413
414 inode = file_inode(file);
415
416 if (!inode || !S_ISSOCK(inode->i_mode)) {
417 fput(file);
418 return NULL;
419 }
420
421 socket = SOCKET_I(inode);
422
423 return socket;
424}
425EXPORT_SYMBOL_GPL(sockfd_to_socket);
426
427
428static unsigned int tweak_transfer_flags(unsigned int flags)
429{
430 flags &= ~URB_NO_TRANSFER_DMA_MAP;
431 return flags;
432}
433
434static void usbip_pack_cmd_submit(struct usbip_header *pdu, struct urb *urb,
435 int pack)
436{
437 struct usbip_header_cmd_submit *spdu = &pdu->u.cmd_submit;
438
439
440
441
442
443 if (pack) {
444 spdu->transfer_flags =
445 tweak_transfer_flags(urb->transfer_flags);
446 spdu->transfer_buffer_length = urb->transfer_buffer_length;
447 spdu->start_frame = urb->start_frame;
448 spdu->number_of_packets = urb->number_of_packets;
449 spdu->interval = urb->interval;
450 } else {
451 urb->transfer_flags = spdu->transfer_flags;
452 urb->transfer_buffer_length = spdu->transfer_buffer_length;
453 urb->start_frame = spdu->start_frame;
454 urb->number_of_packets = spdu->number_of_packets;
455 urb->interval = spdu->interval;
456 }
457}
458
459static void usbip_pack_ret_submit(struct usbip_header *pdu, struct urb *urb,
460 int pack)
461{
462 struct usbip_header_ret_submit *rpdu = &pdu->u.ret_submit;
463
464 if (pack) {
465 rpdu->status = urb->status;
466 rpdu->actual_length = urb->actual_length;
467 rpdu->start_frame = urb->start_frame;
468 rpdu->number_of_packets = urb->number_of_packets;
469 rpdu->error_count = urb->error_count;
470 } else {
471 urb->status = rpdu->status;
472 urb->actual_length = rpdu->actual_length;
473 urb->start_frame = rpdu->start_frame;
474 urb->number_of_packets = rpdu->number_of_packets;
475 urb->error_count = rpdu->error_count;
476 }
477}
478
479void usbip_pack_pdu(struct usbip_header *pdu, struct urb *urb, int cmd,
480 int pack)
481{
482 switch (cmd) {
483 case USBIP_CMD_SUBMIT:
484 usbip_pack_cmd_submit(pdu, urb, pack);
485 break;
486 case USBIP_RET_SUBMIT:
487 usbip_pack_ret_submit(pdu, urb, pack);
488 break;
489 default:
490
491 pr_err("unknown command\n");
492 break;
493 }
494}
495EXPORT_SYMBOL_GPL(usbip_pack_pdu);
496
497static void correct_endian_basic(struct usbip_header_basic *base, int send)
498{
499 if (send) {
500 base->command = cpu_to_be32(base->command);
501 base->seqnum = cpu_to_be32(base->seqnum);
502 base->devid = cpu_to_be32(base->devid);
503 base->direction = cpu_to_be32(base->direction);
504 base->ep = cpu_to_be32(base->ep);
505 } else {
506 base->command = be32_to_cpu(base->command);
507 base->seqnum = be32_to_cpu(base->seqnum);
508 base->devid = be32_to_cpu(base->devid);
509 base->direction = be32_to_cpu(base->direction);
510 base->ep = be32_to_cpu(base->ep);
511 }
512}
513
514static void correct_endian_cmd_submit(struct usbip_header_cmd_submit *pdu,
515 int send)
516{
517 if (send) {
518 pdu->transfer_flags = cpu_to_be32(pdu->transfer_flags);
519
520 cpu_to_be32s(&pdu->transfer_buffer_length);
521 cpu_to_be32s(&pdu->start_frame);
522 cpu_to_be32s(&pdu->number_of_packets);
523 cpu_to_be32s(&pdu->interval);
524 } else {
525 pdu->transfer_flags = be32_to_cpu(pdu->transfer_flags);
526
527 be32_to_cpus(&pdu->transfer_buffer_length);
528 be32_to_cpus(&pdu->start_frame);
529 be32_to_cpus(&pdu->number_of_packets);
530 be32_to_cpus(&pdu->interval);
531 }
532}
533
534static void correct_endian_ret_submit(struct usbip_header_ret_submit *pdu,
535 int send)
536{
537 if (send) {
538 cpu_to_be32s(&pdu->status);
539 cpu_to_be32s(&pdu->actual_length);
540 cpu_to_be32s(&pdu->start_frame);
541 cpu_to_be32s(&pdu->number_of_packets);
542 cpu_to_be32s(&pdu->error_count);
543 } else {
544 be32_to_cpus(&pdu->status);
545 be32_to_cpus(&pdu->actual_length);
546 be32_to_cpus(&pdu->start_frame);
547 be32_to_cpus(&pdu->number_of_packets);
548 be32_to_cpus(&pdu->error_count);
549 }
550}
551
552static void correct_endian_cmd_unlink(struct usbip_header_cmd_unlink *pdu,
553 int send)
554{
555 if (send)
556 pdu->seqnum = cpu_to_be32(pdu->seqnum);
557 else
558 pdu->seqnum = be32_to_cpu(pdu->seqnum);
559}
560
561static void correct_endian_ret_unlink(struct usbip_header_ret_unlink *pdu,
562 int send)
563{
564 if (send)
565 cpu_to_be32s(&pdu->status);
566 else
567 be32_to_cpus(&pdu->status);
568}
569
570void usbip_header_correct_endian(struct usbip_header *pdu, int send)
571{
572 __u32 cmd = 0;
573
574 if (send)
575 cmd = pdu->base.command;
576
577 correct_endian_basic(&pdu->base, send);
578
579 if (!send)
580 cmd = pdu->base.command;
581
582 switch (cmd) {
583 case USBIP_CMD_SUBMIT:
584 correct_endian_cmd_submit(&pdu->u.cmd_submit, send);
585 break;
586 case USBIP_RET_SUBMIT:
587 correct_endian_ret_submit(&pdu->u.ret_submit, send);
588 break;
589 case USBIP_CMD_UNLINK:
590 correct_endian_cmd_unlink(&pdu->u.cmd_unlink, send);
591 break;
592 case USBIP_RET_UNLINK:
593 correct_endian_ret_unlink(&pdu->u.ret_unlink, send);
594 break;
595 default:
596
597 pr_err("unknown command\n");
598 break;
599 }
600}
601EXPORT_SYMBOL_GPL(usbip_header_correct_endian);
602
603static void usbip_iso_packet_correct_endian(
604 struct usbip_iso_packet_descriptor *iso, int send)
605{
606
607 if (send) {
608 iso->offset = cpu_to_be32(iso->offset);
609 iso->length = cpu_to_be32(iso->length);
610 iso->status = cpu_to_be32(iso->status);
611 iso->actual_length = cpu_to_be32(iso->actual_length);
612 } else {
613 iso->offset = be32_to_cpu(iso->offset);
614 iso->length = be32_to_cpu(iso->length);
615 iso->status = be32_to_cpu(iso->status);
616 iso->actual_length = be32_to_cpu(iso->actual_length);
617 }
618}
619
620static void usbip_pack_iso(struct usbip_iso_packet_descriptor *iso,
621 struct usb_iso_packet_descriptor *uiso, int pack)
622{
623 if (pack) {
624 iso->offset = uiso->offset;
625 iso->length = uiso->length;
626 iso->status = uiso->status;
627 iso->actual_length = uiso->actual_length;
628 } else {
629 uiso->offset = iso->offset;
630 uiso->length = iso->length;
631 uiso->status = iso->status;
632 uiso->actual_length = iso->actual_length;
633 }
634}
635
636
637struct usbip_iso_packet_descriptor*
638usbip_alloc_iso_desc_pdu(struct urb *urb, ssize_t *bufflen)
639{
640 struct usbip_iso_packet_descriptor *iso;
641 int np = urb->number_of_packets;
642 ssize_t size = np * sizeof(*iso);
643 int i;
644
645 iso = kzalloc(size, GFP_KERNEL);
646 if (!iso)
647 return NULL;
648
649 for (i = 0; i < np; i++) {
650 usbip_pack_iso(&iso[i], &urb->iso_frame_desc[i], 1);
651 usbip_iso_packet_correct_endian(&iso[i], 1);
652 }
653
654 *bufflen = size;
655
656 return iso;
657}
658EXPORT_SYMBOL_GPL(usbip_alloc_iso_desc_pdu);
659
660
661int usbip_recv_iso(struct usbip_device *ud, struct urb *urb)
662{
663 void *buff;
664 struct usbip_iso_packet_descriptor *iso;
665 int np = urb->number_of_packets;
666 int size = np * sizeof(*iso);
667 int i;
668 int ret;
669 int total_length = 0;
670
671 if (!usb_pipeisoc(urb->pipe))
672 return 0;
673
674
675 if (np == 0)
676 return 0;
677
678 buff = kzalloc(size, GFP_KERNEL);
679 if (!buff)
680 return -ENOMEM;
681
682 ret = usbip_recv(ud->tcp_socket, buff, size);
683 if (ret != size) {
684 dev_err(&urb->dev->dev, "recv iso_frame_descriptor, %d\n",
685 ret);
686 kfree(buff);
687
688 if (ud->side == USBIP_STUB)
689 usbip_event_add(ud, SDEV_EVENT_ERROR_TCP);
690 else
691 usbip_event_add(ud, VDEV_EVENT_ERROR_TCP);
692
693 return -EPIPE;
694 }
695
696 iso = (struct usbip_iso_packet_descriptor *) buff;
697 for (i = 0; i < np; i++) {
698 usbip_iso_packet_correct_endian(&iso[i], 0);
699 usbip_pack_iso(&iso[i], &urb->iso_frame_desc[i], 0);
700 total_length += urb->iso_frame_desc[i].actual_length;
701 }
702
703 kfree(buff);
704
705 if (total_length != urb->actual_length) {
706 dev_err(&urb->dev->dev,
707 "total length of iso packets %d not equal to actual "
708 "length of buffer %d\n",
709 total_length, urb->actual_length);
710
711 if (ud->side == USBIP_STUB)
712 usbip_event_add(ud, SDEV_EVENT_ERROR_TCP);
713 else
714 usbip_event_add(ud, VDEV_EVENT_ERROR_TCP);
715
716 return -EPIPE;
717 }
718
719 return ret;
720}
721EXPORT_SYMBOL_GPL(usbip_recv_iso);
722
723
724
725
726
727
728
729
730void usbip_pad_iso(struct usbip_device *ud, struct urb *urb)
731{
732 int np = urb->number_of_packets;
733 int i;
734 int actualoffset = urb->actual_length;
735
736 if (!usb_pipeisoc(urb->pipe))
737 return;
738
739
740 if (np == 0 || urb->actual_length == 0)
741 return;
742
743
744
745
746
747 if (urb->actual_length == urb->transfer_buffer_length)
748 return;
749
750
751
752
753
754 for (i = np-1; i > 0; i--) {
755 actualoffset -= urb->iso_frame_desc[i].actual_length;
756 memmove(urb->transfer_buffer + urb->iso_frame_desc[i].offset,
757 urb->transfer_buffer + actualoffset,
758 urb->iso_frame_desc[i].actual_length);
759 }
760}
761EXPORT_SYMBOL_GPL(usbip_pad_iso);
762
763
764int usbip_recv_xbuff(struct usbip_device *ud, struct urb *urb)
765{
766 int ret;
767 int size;
768
769 if (ud->side == USBIP_STUB) {
770
771 if (usb_pipein(urb->pipe))
772 return 0;
773
774 size = urb->transfer_buffer_length;
775 } else {
776
777 if (usb_pipeout(urb->pipe))
778 return 0;
779
780 size = urb->actual_length;
781 }
782
783
784 if (!(size > 0))
785 return 0;
786
787 ret = usbip_recv(ud->tcp_socket, urb->transfer_buffer, size);
788 if (ret != size) {
789 dev_err(&urb->dev->dev, "recv xbuf, %d\n", ret);
790 if (ud->side == USBIP_STUB) {
791 usbip_event_add(ud, SDEV_EVENT_ERROR_TCP);
792 } else {
793 usbip_event_add(ud, VDEV_EVENT_ERROR_TCP);
794 return -EPIPE;
795 }
796 }
797
798 return ret;
799}
800EXPORT_SYMBOL_GPL(usbip_recv_xbuff);
801
802static int __init usbip_core_init(void)
803{
804 pr_info(DRIVER_DESC " v" USBIP_VERSION "\n");
805 return 0;
806}
807
808static void __exit usbip_core_exit(void)
809{
810 return;
811}
812
813module_init(usbip_core_init);
814module_exit(usbip_core_exit);
815
816MODULE_AUTHOR(DRIVER_AUTHOR);
817MODULE_DESCRIPTION(DRIVER_DESC);
818MODULE_LICENSE("GPL");
819MODULE_VERSION(USBIP_VERSION);
820
