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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 |
38 | unsigned long usbip_debug_flag = 0xffffffff; |
39 | #else | |
40 | unsigned long usbip_debug_flag; | |
41 | #endif | |
42 | EXPORT_SYMBOL_GPL(usbip_debug_flag); | |
43 | ||
44 | ||
45 | /* FIXME */ | |
46 | struct device_attribute dev_attr_usbip_debug; | |
47 | EXPORT_SYMBOL_GPL(dev_attr_usbip_debug); | |
48 | ||
49 | ||
50 | static 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 | ||
56 | static 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 | } | |
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 | { | |
aad86577 HC |
67 | print_hex_dump(KERN_DEBUG, "usb-ip", DUMP_PREFIX_OFFSET, 16, 4, |
68 | buff, bufflen, false); | |
05a1f28e TH |
69 | } |
70 | ||
71 | static 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 | ||
103 | static 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 | ||
176 | static 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 | ||
196 | static 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 | ||
267 | void 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 | } | |
312 | EXPORT_SYMBOL_GPL(usbip_dump_urb); | |
313 | ||
314 | void 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 | } | |
350 | EXPORT_SYMBOL_GPL(usbip_dump_header); | |
351 | ||
352 | ||
353 | /*-------------------------------------------------------------------------*/ | |
354 | /* thread routines */ | |
355 | ||
356 | int 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 |
381 | static 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 | ||
390 | static 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 | 399 | int 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 | |
429 | tx_thread_err: | |
430 | stop_rx_thread(ud); | |
431 | ||
432 | ust_exit: | |
433 | return err; | |
05a1f28e TH |
434 | } |
435 | EXPORT_SYMBOL_GPL(usbip_start_threads); | |
436 | ||
437 | void 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 | } |
443 | EXPORT_SYMBOL_GPL(usbip_stop_threads); | |
444 | ||
445 | void 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 | } | |
453 | EXPORT_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 */ | |
460 | int 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 | ||
549 | err: | |
550 | return result; | |
551 | } | |
552 | EXPORT_SYMBOL_GPL(usbip_xmit); | |
553 | ||
05a1f28e TH |
554 | struct 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 | } | |
575 | EXPORT_SYMBOL_GPL(sockfd_to_socket); | |
576 | ||
577 | ||
578 | ||
579 | /*-------------------------------------------------------------------------*/ | |
580 | /* pdu routines */ | |
581 | ||
582 | /* there may be more cases to tweak the flags. */ | |
583 | static unsigned int tweak_transfer_flags(unsigned int flags) | |
584 | { | |
85bcb5ee | 585 | flags &= ~URB_NO_TRANSFER_DMA_MAP; |
05a1f28e TH |
586 | return flags; |
587 | } | |
588 | ||
589 | static 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 | ||
617 | static 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 | ||
640 | void 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 | } | |
656 | EXPORT_SYMBOL_GPL(usbip_pack_pdu); | |
657 | ||
658 | ||
659 | static 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 | ||
676 | static 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 | ||
696 | static 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 | ||
712 | static 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 | ||
721 | static 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 | ||
730 | void 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 | } | |
761 | EXPORT_SYMBOL_GPL(usbip_header_correct_endian); | |
762 | ||
763 | static 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 | ||
781 | static 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 */ | |
799 | void *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 | } | |
822 | EXPORT_SYMBOL_GPL(usbip_alloc_iso_desc_pdu); | |
823 | ||
824 | /* some members of urb must be substituted before. */ | |
825 | int 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 | } | |
873 | EXPORT_SYMBOL_GPL(usbip_recv_iso); | |
874 | ||
875 | ||
876 | /* some members of urb must be substituted before. */ | |
877 | int 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 | } | |
916 | EXPORT_SYMBOL_GPL(usbip_recv_xbuff); | |
917 | ||
918 | ||
919 | /*-------------------------------------------------------------------------*/ | |
920 | ||
921 | static int __init usbip_common_init(void) | |
922 | { | |
923 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "" DRIVER_VERSION); | |
924 | ||
925 | return 0; | |
926 | } | |
927 | ||
928 | static void __exit usbip_common_exit(void) | |
929 | { | |
930 | return; | |
931 | } | |
932 | ||
933 | ||
934 | ||
935 | ||
936 | module_init(usbip_common_init); | |
937 | module_exit(usbip_common_exit); | |
938 | ||
939 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
940 | MODULE_DESCRIPTION(DRIVER_DESC); | |
941 | MODULE_LICENSE("GPL"); |