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staging: usbip: usbip_common: kill rx thread on tx thread creation error.
[net-next-2.6.git] / drivers / staging / usbip / usbip_common.c
CommitLineData
05a1f28e
TH		 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>
1d03d2bd 21#include <linux/smp_lock.h>
05a1f28e
TH		 22#include <linux/file.h>
23#include <linux/tcp.h>
24#include <linux/in.h>
b8868e45 25#include <linux/kthread.h>
5a0e3ad6 26#include <linux/slab.h>
05a1f28e
TH		 27#include "usbip_common.h"
28
29/* version information */
30#define DRIVER_VERSION "1.0"
31#define DRIVER_AUTHOR "Takahiro Hirofuchi <hirofuchi _at_ users.sourceforge.net>"
32#define DRIVER_DESC "usbip common driver"
33
34/*-------------------------------------------------------------------------*/
35/* debug routines */
36
411a861f 37#ifdef CONFIG_USB_IP_DEBUG_ENABLE
05a1f28e
TH		 38unsigned long usbip_debug_flag = 0xffffffff;
39#else
40unsigned long usbip_debug_flag;
41#endif
42EXPORT_SYMBOL_GPL(usbip_debug_flag);
43
44
45/* FIXME */
46struct device_attribute dev_attr_usbip_debug;
47EXPORT_SYMBOL_GPL(dev_attr_usbip_debug);
48
49
50static ssize_t show_flag(struct device *dev, struct device_attribute *attr,
51 char *buf)
52{
53 return sprintf(buf, "%lx\n", usbip_debug_flag);
54}
55
56static ssize_t store_flag(struct device *dev, struct device_attribute *attr,
57 const char *buf, size_t count)
58{
1e5065db 59 sscanf(buf, "%lx", &usbip_debug_flag);
05a1f28e
TH		 60
61 return count;
62}
63DEVICE_ATTR(usbip_debug, (S_IRUGO | S_IWUSR), show_flag, store_flag);
64
65static void usbip_dump_buffer(char *buff, int bufflen)
66{
aad86577
HC		 67 print_hex_dump(KERN_DEBUG, "usb-ip", DUMP_PREFIX_OFFSET, 16, 4,
68 buff, bufflen, false);
05a1f28e
TH		 69}
70
71static void usbip_dump_pipe(unsigned int p)
72{
73 unsigned char type = usb_pipetype(p);
74 unsigned char ep = usb_pipeendpoint(p);
75 unsigned char dev = usb_pipedevice(p);
76 unsigned char dir = usb_pipein(p);
77
b8868e45
BM		 78 printk(KERN_DEBUG "dev(%d) ", dev);
79 printk(KERN_DEBUG "ep(%d) ", ep);
80 printk(KERN_DEBUG "%s ", dir ? "IN" : "OUT");
05a1f28e
TH		 81
82 switch (type) {
83 case PIPE_ISOCHRONOUS:
b8868e45 84 printk(KERN_DEBUG "%s ", "ISO");
05a1f28e
TH		 85 break;
86 case PIPE_INTERRUPT:
b8868e45 87 printk(KERN_DEBUG "%s ", "INT");
05a1f28e
TH		 88 break;
89 case PIPE_CONTROL:
b8868e45 90 printk(KERN_DEBUG "%s ", "CTL");
05a1f28e
TH		 91 break;
92 case PIPE_BULK:
b8868e45 93 printk(KERN_DEBUG "%s ", "BLK");
05a1f28e
TH		 94 break;
95 default:
b8868e45 96 printk(KERN_DEBUG "ERR");
05a1f28e
TH		 97 }
98
b8868e45 99 printk(KERN_DEBUG "\n");
05a1f28e
TH		 100
101}
102
103static void usbip_dump_usb_device(struct usb_device *udev)
104{
105 struct device *dev = &udev->dev;
106 int i;
107
108 dev_dbg(dev, " devnum(%d) devpath(%s)",
109 udev->devnum, udev->devpath);
110
111 switch (udev->speed) {
112 case USB_SPEED_HIGH:
b8868e45 113 printk(KERN_DEBUG " SPD_HIGH");
05a1f28e
TH		 114 break;
115 case USB_SPEED_FULL:
b8868e45 116 printk(KERN_DEBUG " SPD_FULL");
05a1f28e
TH		 117 break;
118 case USB_SPEED_LOW:
b8868e45 119 printk(KERN_DEBUG " SPD_LOW");
05a1f28e
TH		 120 break;
121 case USB_SPEED_UNKNOWN:
b8868e45 122 printk(KERN_DEBUG " SPD_UNKNOWN");
05a1f28e
TH		 123 break;
124 default:
b8868e45 125 printk(KERN_DEBUG " SPD_ERROR");
05a1f28e
TH		 126 }
127
b8868e45
BM		 128 printk(KERN_DEBUG " tt %p, ttport %d", udev->tt, udev->ttport);
129 printk(KERN_DEBUG "\n");
05a1f28e
TH		 130
131 dev_dbg(dev, " ");
132 for (i = 0; i < 16; i++)
b8868e45
BM		 133 printk(KERN_DEBUG " %2u", i);
134 printk(KERN_DEBUG "\n");
05a1f28e
TH		 135
136 dev_dbg(dev, " toggle0(IN) :");
137 for (i = 0; i < 16; i++)
b8868e45
BM		 138 printk(KERN_DEBUG " %2u", (udev->toggle[0] & (1 << i)) ? 1 : 0);
139 printk(KERN_DEBUG "\n");
05a1f28e
TH		 140
141 dev_dbg(dev, " toggle1(OUT):");
142 for (i = 0; i < 16; i++)
b8868e45
BM		 143 printk(KERN_DEBUG " %2u", (udev->toggle[1] & (1 << i)) ? 1 : 0);
144 printk(KERN_DEBUG "\n");
05a1f28e
TH		 145
146
147 dev_dbg(dev, " epmaxp_in :");
148 for (i = 0; i < 16; i++) {
149 if (udev->ep_in[i])
b8868e45 150 printk(KERN_DEBUG " %2u",
05a1f28e
TH		 151 le16_to_cpu(udev->ep_in[i]->desc.wMaxPacketSize));
152 }
b8868e45 153 printk(KERN_DEBUG "\n");
05a1f28e
TH		 154
155 dev_dbg(dev, " epmaxp_out :");
156 for (i = 0; i < 16; i++) {
157 if (udev->ep_out[i])
b8868e45 158 printk(KERN_DEBUG " %2u",
05a1f28e
TH		 159 le16_to_cpu(udev->ep_out[i]->desc.wMaxPacketSize));
160 }
b8868e45 161 printk(KERN_DEBUG "\n");
05a1f28e
TH		 162
163 dev_dbg(dev, "parent %p, bus %p\n", udev->parent, udev->bus);
164
165 dev_dbg(dev, "descriptor %p, config %p, actconfig %p, "
166 "rawdescriptors %p\n", &udev->descriptor, udev->config,
167 udev->actconfig, udev->rawdescriptors);
168
169 dev_dbg(dev, "have_langid %d, string_langid %d\n",
170 udev->have_langid, udev->string_langid);
171
172 dev_dbg(dev, "maxchild %d, children %p\n",
173 udev->maxchild, udev->children);
174}
175
176static void usbip_dump_request_type(__u8 rt)
177{
178 switch (rt & USB_RECIP_MASK) {
179 case USB_RECIP_DEVICE:
b8868e45 180 printk(KERN_DEBUG "DEVICE");
05a1f28e
TH		 181 break;
182 case USB_RECIP_INTERFACE:
b8868e45 183 printk(KERN_DEBUG "INTERF");
05a1f28e
TH		 184 break;
185 case USB_RECIP_ENDPOINT:
b8868e45 186 printk(KERN_DEBUG "ENDPOI");
05a1f28e
TH		 187 break;
188 case USB_RECIP_OTHER:
b8868e45 189 printk(KERN_DEBUG "OTHER ");
05a1f28e
TH		 190 break;
191 default:
b8868e45 192 printk(KERN_DEBUG "------");
05a1f28e
TH		 193 }
194}
195
196static void usbip_dump_usb_ctrlrequest(struct usb_ctrlrequest *cmd)
197{
198 if (!cmd) {
b8868e45 199 printk(KERN_DEBUG " %s : null pointer\n", __func__);
05a1f28e
TH		 200 return;
201 }
202
b8868e45
BM		 203 printk(KERN_DEBUG " ");
204 printk(KERN_DEBUG "bRequestType(%02X) ", cmd->bRequestType);
205 printk(KERN_DEBUG "bRequest(%02X) " , cmd->bRequest);
206 printk(KERN_DEBUG "wValue(%04X) ", cmd->wValue);
207 printk(KERN_DEBUG "wIndex(%04X) ", cmd->wIndex);
208 printk(KERN_DEBUG "wLength(%04X) ", cmd->wLength);
05a1f28e 209
b8868e45 210 printk(KERN_DEBUG "\n ");
05a1f28e
TH		 211
212 if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
b8868e45 213 printk(KERN_DEBUG "STANDARD ");
05a1f28e
TH		 214 switch (cmd->bRequest) {
215 case USB_REQ_GET_STATUS:
b8868e45 216 printk(KERN_DEBUG "GET_STATUS");
05a1f28e
TH		 217 break;
218 case USB_REQ_CLEAR_FEATURE:
b8868e45 219 printk(KERN_DEBUG "CLEAR_FEAT");
05a1f28e
TH		 220 break;
221 case USB_REQ_SET_FEATURE:
b8868e45 222 printk(KERN_DEBUG "SET_FEAT ");
05a1f28e
TH		 223 break;
224 case USB_REQ_SET_ADDRESS:
b8868e45 225 printk(KERN_DEBUG "SET_ADDRRS");
05a1f28e
TH		 226 break;
227 case USB_REQ_GET_DESCRIPTOR:
b8868e45 228 printk(KERN_DEBUG "GET_DESCRI");
05a1f28e
TH		 229 break;
230 case USB_REQ_SET_DESCRIPTOR:
b8868e45 231 printk(KERN_DEBUG "SET_DESCRI");
05a1f28e
TH		 232 break;
233 case USB_REQ_GET_CONFIGURATION:
b8868e45 234 printk(KERN_DEBUG "GET_CONFIG");
05a1f28e
TH		 235 break;
236 case USB_REQ_SET_CONFIGURATION:
b8868e45 237 printk(KERN_DEBUG "SET_CONFIG");
05a1f28e
TH		 238 break;
239 case USB_REQ_GET_INTERFACE:
b8868e45 240 printk(KERN_DEBUG "GET_INTERF");
05a1f28e
TH		 241 break;
242 case USB_REQ_SET_INTERFACE:
b8868e45 243 printk(KERN_DEBUG "SET_INTERF");
05a1f28e
TH		 244 break;
245 case USB_REQ_SYNCH_FRAME:
b8868e45 246 printk(KERN_DEBUG "SYNC_FRAME");
05a1f28e
TH		 247 break;
248 default:
b8868e45 249 printk(KERN_DEBUG "REQ(%02X) ", cmd->bRequest);
05a1f28e
TH		 250 }
251
b8868e45 252 printk(KERN_DEBUG " ");
05a1f28e
TH		 253 usbip_dump_request_type(cmd->bRequestType);
254
255 } else if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_CLASS)
b8868e45 256 printk(KERN_DEBUG "CLASS ");
05a1f28e
TH		 257
258 else if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_VENDOR)
b8868e45 259 printk(KERN_DEBUG "VENDOR ");
05a1f28e
TH		 260
261 else if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_RESERVED)
b8868e45 262 printk(KERN_DEBUG "RESERVED");
05a1f28e 263
b8868e45 264 printk(KERN_DEBUG "\n");
05a1f28e
TH		 265}
266
267void usbip_dump_urb(struct urb *urb)
268{
269 struct device *dev;
270
271 if (!urb) {
272 printk(KERN_DEBUG KBUILD_MODNAME
273 ":%s: urb: null pointer!!\n", __func__);
274 return;
275 }
276
277 if (!urb->dev) {
278 printk(KERN_DEBUG KBUILD_MODNAME
279 ":%s: urb->dev: null pointer!!\n", __func__);
280 return;
281 }
282 dev = &urb->dev->dev;
283
284 dev_dbg(dev, " urb :%p\n", urb);
285 dev_dbg(dev, " dev :%p\n", urb->dev);
286
287 usbip_dump_usb_device(urb->dev);
288
289 dev_dbg(dev, " pipe :%08x ", urb->pipe);
290
291 usbip_dump_pipe(urb->pipe);
292
293 dev_dbg(dev, " status :%d\n", urb->status);
294 dev_dbg(dev, " transfer_flags :%08X\n", urb->transfer_flags);
295 dev_dbg(dev, " transfer_buffer :%p\n", urb->transfer_buffer);
b8868e45
BM		 296 dev_dbg(dev, " transfer_buffer_length:%d\n",
297 urb->transfer_buffer_length);
05a1f28e
TH		 298 dev_dbg(dev, " actual_length :%d\n", urb->actual_length);
299 dev_dbg(dev, " setup_packet :%p\n", urb->setup_packet);
300
301 if (urb->setup_packet && usb_pipetype(urb->pipe) == PIPE_CONTROL)
302 usbip_dump_usb_ctrlrequest(
303 (struct usb_ctrlrequest *)urb->setup_packet);
304
305 dev_dbg(dev, " start_frame :%d\n", urb->start_frame);
306 dev_dbg(dev, " number_of_packets :%d\n", urb->number_of_packets);
307 dev_dbg(dev, " interval :%d\n", urb->interval);
308 dev_dbg(dev, " error_count :%d\n", urb->error_count);
309 dev_dbg(dev, " context :%p\n", urb->context);
310 dev_dbg(dev, " complete :%p\n", urb->complete);
311}
312EXPORT_SYMBOL_GPL(usbip_dump_urb);
313
314void usbip_dump_header(struct usbip_header *pdu)
315{
b8868e45 316 usbip_udbg("BASE: cmd %u seq %u devid %u dir %u ep %u\n",
05a1f28e
TH		 317 pdu->base.command,
318 pdu->base.seqnum,
319 pdu->base.devid,
320 pdu->base.direction,
321 pdu->base.ep);
322
323 switch (pdu->base.command) {
324 case USBIP_CMD_SUBMIT:
b8868e45
BM		 325 usbip_udbg("CMD_SUBMIT: "
326 "x_flags %u x_len %u sf %u #p %u iv %u\n",
05a1f28e
TH		 327 pdu->u.cmd_submit.transfer_flags,
328 pdu->u.cmd_submit.transfer_buffer_length,
329 pdu->u.cmd_submit.start_frame,
330 pdu->u.cmd_submit.number_of_packets,
331 pdu->u.cmd_submit.interval);
332 break;
333 case USBIP_CMD_UNLINK:
b8868e45 334 usbip_udbg("CMD_UNLINK: seq %u\n", pdu->u.cmd_unlink.seqnum);
05a1f28e
TH		 335 break;
336 case USBIP_RET_SUBMIT:
b8868e45 337 usbip_udbg("RET_SUBMIT: st %d al %u sf %d ec %d\n",
05a1f28e
TH		 338 pdu->u.ret_submit.status,
339 pdu->u.ret_submit.actual_length,
340 pdu->u.ret_submit.start_frame,
341 pdu->u.ret_submit.error_count);
342 case USBIP_RET_UNLINK:
b8868e45 343 usbip_udbg("RET_UNLINK: status %d\n", pdu->u.ret_unlink.status);
05a1f28e
TH		 344 break;
345 default:
346 /* NOT REACHED */
b8868e45 347 usbip_udbg("UNKNOWN\n");
05a1f28e
TH		 348 }
349}
350EXPORT_SYMBOL_GPL(usbip_dump_header);
351
352
353/*-------------------------------------------------------------------------*/
354/* thread routines */
355
356int usbip_thread(void *param)
357{
358 struct usbip_task *ut = param;
359
360 if (!ut)
361 return -EINVAL;
362
363 lock_kernel();
364 daemonize(ut->name);
365 allow_signal(SIGKILL);
366 ut->thread = current;
367 unlock_kernel();
368
369 /* srv.rb must wait for rx_thread starting */
370 complete(&ut->thread_done);
371
372 /* start of while loop */
373 ut->loop_ops(ut);
374
375 /* end of loop */
376 ut->thread = NULL;
377
378 complete_and_exit(&ut->thread_done, 0);
379}
380
f2102d31
HC		 381static void stop_rx_thread(struct usbip_device *ud)
382{
383 if (ud->tcp_rx.thread != NULL) {
384 send_sig(SIGKILL, ud->tcp_rx.thread, 1);
385 wait_for_completion(&ud->tcp_rx.thread_done);
386 usbip_udbg("rx_thread for ud %p has finished\n", ud);
387 }
388}
389
390static void stop_tx_thread(struct usbip_device *ud)
391{
392 if (ud->tcp_tx.thread != NULL) {
393 send_sig(SIGKILL, ud->tcp_tx.thread, 1);
394 wait_for_completion(&ud->tcp_tx.thread_done);
395 usbip_udbg("tx_thread for ud %p has finished\n", ud);
396 }
397}
398
b8868e45 399int usbip_start_threads(struct usbip_device *ud)
05a1f28e
TH		 400{
401 /*
402 * threads are invoked per one device (per one connection).
403 */
b8868e45 404 struct task_struct *th;
f2102d31 405 int err = 0;
05d6d677 406
b8868e45
BM		 407 th = kthread_run(usbip_thread, (void *)&ud->tcp_rx, "usbip");
408 if (IS_ERR(th)) {
409 printk(KERN_WARNING
410 "Unable to start control thread\n");
f2102d31
HC		 411 err = PTR_ERR(th);
412 goto ust_exit;
05d6d677 413 }
f2102d31 414
b8868e45
BM		 415 th = kthread_run(usbip_thread, (void *)&ud->tcp_tx, "usbip");
416 if (IS_ERR(th)) {
417 printk(KERN_WARNING
418 "Unable to start control thread\n");
f2102d31
HC		 419 err = PTR_ERR(th);
420 goto tx_thread_err;
05d6d677 421 }
05a1f28e
TH		 422
423 /* confirm threads are starting */
424 wait_for_completion(&ud->tcp_rx.thread_done);
425 wait_for_completion(&ud->tcp_tx.thread_done);
f2102d31 426
b8868e45 427 return 0;
f2102d31
HC		 428
429tx_thread_err:
430 stop_rx_thread(ud);
431
432ust_exit:
433 return err;
05a1f28e
TH		 434}
435EXPORT_SYMBOL_GPL(usbip_start_threads);
436
437void usbip_stop_threads(struct usbip_device *ud)
438{
439 /* kill threads related to this sdev, if v.c. exists */
f2102d31
HC		 440 stop_rx_thread(ud);
441 stop_tx_thread(ud);
05a1f28e
TH		 442}
443EXPORT_SYMBOL_GPL(usbip_stop_threads);
444
445void usbip_task_init(struct usbip_task *ut, char *name,
446 void (*loop_ops)(struct usbip_task *))
447{
448 ut->thread = NULL;
449 init_completion(&ut->thread_done);
450 ut->name = name;
451 ut->loop_ops = loop_ops;
452}
453EXPORT_SYMBOL_GPL(usbip_task_init);
454
455
456/*-------------------------------------------------------------------------*/
457/* socket routines */
458
459 /* Send/receive messages over TCP/IP. I refer drivers/block/nbd.c */
460int usbip_xmit(int send, struct socket *sock, char *buf,
461 int size, int msg_flags)
462{
463 int result;
464 struct msghdr msg;
465 struct kvec iov;
466 int total = 0;
467
b8868e45 468 /* for blocks of if (usbip_dbg_flag_xmit) */
05a1f28e
TH		 469 char *bp = buf;
470 int osize = size;
471
b8868e45 472 usbip_dbg_xmit("enter\n");
05a1f28e
TH		 473
474 if (!sock || !buf || !size) {
475 printk(KERN_ERR "%s: invalid arg, sock %p buff %p size %d\n",
476 __func__, sock, buf, size);
477 return -EINVAL;
478 }
479
480
b8868e45 481 if (usbip_dbg_flag_xmit) {
05a1f28e
TH		 482 if (send) {
483 if (!in_interrupt())
484 printk(KERN_DEBUG "%-10s:", current->comm);
485 else
b8868e45 486 printk(KERN_DEBUG "interrupt :");
05a1f28e 487
b8868e45 488 printk(KERN_DEBUG "%s: sending... , sock %p, buf %p, "
05a1f28e
TH		 489 "size %d, msg_flags %d\n", __func__,
490 sock, buf, size, msg_flags);
491 usbip_dump_buffer(buf, size);
492 }
493 }
494
495
496 do {
497 sock->sk->sk_allocation = GFP_NOIO;
498 iov.iov_base = buf;
499 iov.iov_len = size;
500 msg.msg_name = NULL;
501 msg.msg_namelen = 0;
502 msg.msg_control = NULL;
503 msg.msg_controllen = 0;
504 msg.msg_namelen = 0;
505 msg.msg_flags = msg_flags | MSG_NOSIGNAL;
506
507 if (send)
508 result = kernel_sendmsg(sock, &msg, &iov, 1, size);
509 else
510 result = kernel_recvmsg(sock, &msg, &iov, 1, size,
511 MSG_WAITALL);
512
513 if (result <= 0) {
b8868e45
BM		 514 usbip_udbg("usbip_xmit: %s sock %p buf %p size %u ret "
515 "%d total %d\n",
05a1f28e
TH		 516 send ? "send" : "receive", sock, buf,
517 size, result, total);
518 goto err;
519 }
520
521 size -= result;
522 buf += result;
523 total += result;
524
525 } while (size > 0);
526
527
b8868e45 528 if (usbip_dbg_flag_xmit) {
05a1f28e
TH		 529 if (!send) {
530 if (!in_interrupt())
531 printk(KERN_DEBUG "%-10s:", current->comm);
532 else
b8868e45 533 printk(KERN_DEBUG "interrupt :");
05a1f28e 534
b8868e45 535 printk(KERN_DEBUG "usbip_xmit: receiving....\n");
05a1f28e 536 usbip_dump_buffer(bp, osize);
b8868e45
BM		 537 printk(KERN_DEBUG "usbip_xmit: received, osize %d ret "
538 "%d size %d total %d\n", osize, result,
539 size, total);
05a1f28e
TH		 540 }
541
542 if (send)
b8868e45
BM		 543 printk(KERN_DEBUG "usbip_xmit: send, total %d\n",
544 total);
05a1f28e
TH		 545 }
546
547 return total;
548
549err:
550 return result;
551}
552EXPORT_SYMBOL_GPL(usbip_xmit);
553
05a1f28e
TH		 554struct socket *sockfd_to_socket(unsigned int sockfd)
555{
556 struct socket *socket;
557 struct file *file;
558 struct inode *inode;
559
560 file = fget(sockfd);
561 if (!file) {
562 printk(KERN_ERR "%s: invalid sockfd\n", __func__);
563 return NULL;
564 }
565
566 inode = file->f_dentry->d_inode;
567
568 if (!inode || !S_ISSOCK(inode->i_mode))
569 return NULL;
570
571 socket = SOCKET_I(inode);
572
573 return socket;
574}
575EXPORT_SYMBOL_GPL(sockfd_to_socket);
576
577
578
579/*-------------------------------------------------------------------------*/
580/* pdu routines */
581
582/* there may be more cases to tweak the flags. */
583static unsigned int tweak_transfer_flags(unsigned int flags)
584{
85bcb5ee 585 flags &= ~URB_NO_TRANSFER_DMA_MAP;
05a1f28e
TH		 586 return flags;
587}
588
589static void usbip_pack_cmd_submit(struct usbip_header *pdu, struct urb *urb,
590 int pack)
591{
592 struct usbip_header_cmd_submit *spdu = &pdu->u.cmd_submit;
593
594 /*
595 * Some members are not still implemented in usbip. I hope this issue
596 * will be discussed when usbip is ported to other operating systems.
597 */
598 if (pack) {
599 /* vhci_tx.c */
600 spdu->transfer_flags =
601 tweak_transfer_flags(urb->transfer_flags);
602 spdu->transfer_buffer_length = urb->transfer_buffer_length;
603 spdu->start_frame = urb->start_frame;
604 spdu->number_of_packets = urb->number_of_packets;
605 spdu->interval = urb->interval;
606 } else {
607 /* stub_rx.c */
608 urb->transfer_flags = spdu->transfer_flags;
609
610 urb->transfer_buffer_length = spdu->transfer_buffer_length;
611 urb->start_frame = spdu->start_frame;
612 urb->number_of_packets = spdu->number_of_packets;
613 urb->interval = spdu->interval;
614 }
615}
616
617static void usbip_pack_ret_submit(struct usbip_header *pdu, struct urb *urb,
618 int pack)
619{
620 struct usbip_header_ret_submit *rpdu = &pdu->u.ret_submit;
621
622 if (pack) {
623 /* stub_tx.c */
624
625 rpdu->status = urb->status;
626 rpdu->actual_length = urb->actual_length;
627 rpdu->start_frame = urb->start_frame;
628 rpdu->error_count = urb->error_count;
629 } else {
630 /* vhci_rx.c */
631
632 urb->status = rpdu->status;
633 urb->actual_length = rpdu->actual_length;
634 urb->start_frame = rpdu->start_frame;
635 urb->error_count = rpdu->error_count;
636 }
637}
638
639
640void usbip_pack_pdu(struct usbip_header *pdu, struct urb *urb, int cmd,
641 int pack)
642{
643 switch (cmd) {
644 case USBIP_CMD_SUBMIT:
645 usbip_pack_cmd_submit(pdu, urb, pack);
646 break;
647 case USBIP_RET_SUBMIT:
648 usbip_pack_ret_submit(pdu, urb, pack);
649 break;
650 default:
651 err("unknown command");
652 /* NOTREACHED */
653 /* BUG(); */
654 }
655}
656EXPORT_SYMBOL_GPL(usbip_pack_pdu);
657
658
659static void correct_endian_basic(struct usbip_header_basic *base, int send)
660{
661 if (send) {
662 base->command = cpu_to_be32(base->command);
663 base->seqnum = cpu_to_be32(base->seqnum);
664 base->devid = cpu_to_be32(base->devid);
665 base->direction = cpu_to_be32(base->direction);
666 base->ep = cpu_to_be32(base->ep);
667 } else {
668 base->command = be32_to_cpu(base->command);
669 base->seqnum = be32_to_cpu(base->seqnum);
670 base->devid = be32_to_cpu(base->devid);
671 base->direction = be32_to_cpu(base->direction);
672 base->ep = be32_to_cpu(base->ep);
673 }
674}
675
676static void correct_endian_cmd_submit(struct usbip_header_cmd_submit *pdu,
677 int send)
678{
679 if (send) {
680 pdu->transfer_flags = cpu_to_be32(pdu->transfer_flags);
681
682 cpu_to_be32s(&pdu->transfer_buffer_length);
683 cpu_to_be32s(&pdu->start_frame);
684 cpu_to_be32s(&pdu->number_of_packets);
685 cpu_to_be32s(&pdu->interval);
686 } else {
687 pdu->transfer_flags = be32_to_cpu(pdu->transfer_flags);
688
689 be32_to_cpus(&pdu->transfer_buffer_length);
690 be32_to_cpus(&pdu->start_frame);
691 be32_to_cpus(&pdu->number_of_packets);
692 be32_to_cpus(&pdu->interval);
693 }
694}
695
696static void correct_endian_ret_submit(struct usbip_header_ret_submit *pdu,
697 int send)
698{
699 if (send) {
700 cpu_to_be32s(&pdu->status);
701 cpu_to_be32s(&pdu->actual_length);
702 cpu_to_be32s(&pdu->start_frame);
703 cpu_to_be32s(&pdu->error_count);
704 } else {
705 be32_to_cpus(&pdu->status);
706 be32_to_cpus(&pdu->actual_length);
707 be32_to_cpus(&pdu->start_frame);
708 be32_to_cpus(&pdu->error_count);
709 }
710}
711
712static void correct_endian_cmd_unlink(struct usbip_header_cmd_unlink *pdu,
713 int send)
714{
715 if (send)
716 pdu->seqnum = cpu_to_be32(pdu->seqnum);
717 else
718 pdu->seqnum = be32_to_cpu(pdu->seqnum);
719}
720
721static void correct_endian_ret_unlink(struct usbip_header_ret_unlink *pdu,
722 int send)
723{
724 if (send)
725 cpu_to_be32s(&pdu->status);
726 else
727 be32_to_cpus(&pdu->status);
728}
729
730void usbip_header_correct_endian(struct usbip_header *pdu, int send)
731{
732 __u32 cmd = 0;
733
734 if (send)
735 cmd = pdu->base.command;
736
737 correct_endian_basic(&pdu->base, send);
738
739 if (!send)
740 cmd = pdu->base.command;
741
742 switch (cmd) {
743 case USBIP_CMD_SUBMIT:
744 correct_endian_cmd_submit(&pdu->u.cmd_submit, send);
745 break;
746 case USBIP_RET_SUBMIT:
747 correct_endian_ret_submit(&pdu->u.ret_submit, send);
748 break;
749 case USBIP_CMD_UNLINK:
750 correct_endian_cmd_unlink(&pdu->u.cmd_unlink, send);
751 break;
752 case USBIP_RET_UNLINK:
753 correct_endian_ret_unlink(&pdu->u.ret_unlink, send);
754 break;
755 default:
756 /* NOTREACHED */
757 err("unknown command in pdu header: %d", cmd);
758 /* BUG(); */
759 }
760}
761EXPORT_SYMBOL_GPL(usbip_header_correct_endian);
762
763static void usbip_iso_pakcet_correct_endian(
764 struct usbip_iso_packet_descriptor *iso,
765 int send)
766{
767 /* does not need all members. but copy all simply. */
768 if (send) {
769 iso->offset = cpu_to_be32(iso->offset);
770 iso->length = cpu_to_be32(iso->length);
771 iso->status = cpu_to_be32(iso->status);
772 iso->actual_length = cpu_to_be32(iso->actual_length);
773 } else {
774 iso->offset = be32_to_cpu(iso->offset);
775 iso->length = be32_to_cpu(iso->length);
776 iso->status = be32_to_cpu(iso->status);
777 iso->actual_length = be32_to_cpu(iso->actual_length);
778 }
779}
780
781static void usbip_pack_iso(struct usbip_iso_packet_descriptor *iso,
782 struct usb_iso_packet_descriptor *uiso, int pack)
783{
784 if (pack) {
785 iso->offset = uiso->offset;
786 iso->length = uiso->length;
787 iso->status = uiso->status;
788 iso->actual_length = uiso->actual_length;
789 } else {
790 uiso->offset = iso->offset;
791 uiso->length = iso->length;
792 uiso->status = iso->status;
793 uiso->actual_length = iso->actual_length;
794 }
795}
796
797
798/* must free buffer */
799void *usbip_alloc_iso_desc_pdu(struct urb *urb, ssize_t *bufflen)
800{
801 void *buff;
802 struct usbip_iso_packet_descriptor *iso;
803 int np = urb->number_of_packets;
804 ssize_t size = np * sizeof(*iso);
805 int i;
806
807 buff = kzalloc(size, GFP_KERNEL);
808 if (!buff)
809 return NULL;
810
811 for (i = 0; i < np; i++) {
812 iso = buff + (i * sizeof(*iso));
813
814 usbip_pack_iso(iso, &urb->iso_frame_desc[i], 1);
815 usbip_iso_pakcet_correct_endian(iso, 1);
816 }
817
818 *bufflen = size;
819
820 return buff;
821}
822EXPORT_SYMBOL_GPL(usbip_alloc_iso_desc_pdu);
823
824/* some members of urb must be substituted before. */
825int usbip_recv_iso(struct usbip_device *ud, struct urb *urb)
826{
827 void *buff;
828 struct usbip_iso_packet_descriptor *iso;
829 int np = urb->number_of_packets;
830 int size = np * sizeof(*iso);
831 int i;
832 int ret;
833
834 if (!usb_pipeisoc(urb->pipe))
835 return 0;
836
837 /* my Bluetooth dongle gets ISO URBs which are np = 0 */
838 if (np == 0) {
b8868e45 839 /* usbip_uinfo("iso np == 0\n"); */
05a1f28e
TH		 840 /* usbip_dump_urb(urb); */
841 return 0;
842 }
843
844 buff = kzalloc(size, GFP_KERNEL);
845 if (!buff)
846 return -ENOMEM;
847
848 ret = usbip_xmit(0, ud->tcp_socket, buff, size, 0);
849 if (ret != size) {
850 dev_err(&urb->dev->dev, "recv iso_frame_descriptor, %d\n",
851 ret);
852 kfree(buff);
853
854 if (ud->side == USBIP_STUB)
855 usbip_event_add(ud, SDEV_EVENT_ERROR_TCP);
856 else
857 usbip_event_add(ud, VDEV_EVENT_ERROR_TCP);
858
859 return -EPIPE;
860 }
861
862 for (i = 0; i < np; i++) {
863 iso = buff + (i * sizeof(*iso));
864
865 usbip_iso_pakcet_correct_endian(iso, 0);
866 usbip_pack_iso(iso, &urb->iso_frame_desc[i], 0);
867 }
868
05a1f28e
TH		 869 kfree(buff);
870
871 return ret;
872}
873EXPORT_SYMBOL_GPL(usbip_recv_iso);
874
875
876/* some members of urb must be substituted before. */
877int usbip_recv_xbuff(struct usbip_device *ud, struct urb *urb)
878{
879 int ret;
880 int size;
881
882 if (ud->side == USBIP_STUB) {
883 /* stub_rx.c */
884 /* the direction of urb must be OUT. */
885 if (usb_pipein(urb->pipe))
886 return 0;
887
888 size = urb->transfer_buffer_length;
889 } else {
890 /* vhci_rx.c */
891 /* the direction of urb must be IN. */
892 if (usb_pipeout(urb->pipe))
893 return 0;
894
895 size = urb->actual_length;
896 }
897
898 /* no need to recv xbuff */
899 if (!(size > 0))
900 return 0;
901
902 ret = usbip_xmit(0, ud->tcp_socket, (char *)urb->transfer_buffer,
903 size, 0);
904 if (ret != size) {
905 dev_err(&urb->dev->dev, "recv xbuf, %d\n", ret);
906 if (ud->side == USBIP_STUB) {
907 usbip_event_add(ud, SDEV_EVENT_ERROR_TCP);
908 } else {
909 usbip_event_add(ud, VDEV_EVENT_ERROR_TCP);
910 return -EPIPE;
911 }
912 }
913
914 return ret;
915}
916EXPORT_SYMBOL_GPL(usbip_recv_xbuff);
917
918
919/*-------------------------------------------------------------------------*/
920
921static int __init usbip_common_init(void)
922{
923 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "" DRIVER_VERSION);
924
925 return 0;
926}
927
928static void __exit usbip_common_exit(void)
929{
930 return;
931}
932
933
934
935
936module_init(usbip_common_init);
937module_exit(usbip_common_exit);
938
939MODULE_AUTHOR(DRIVER_AUTHOR);
940MODULE_DESCRIPTION(DRIVER_DESC);
941MODULE_LICENSE("GPL");
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