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5fd54ace | 1 | // SPDX-License-Identifier: GPL-2.0+ |
05a1f28e TH |
2 | /* |
3 | * Copyright (C) 2003-2008 Takahiro Hirofuchi | |
c7af4c22 IK |
4 | * Copyright (C) 2015-2016 Samsung Electronics |
5 | * Krzysztof Opasiak <k.opasiak@samsung.com> | |
05a1f28e TH |
6 | */ |
7 | ||
7aaacb43 | 8 | #include <asm/byteorder.h> |
05a1f28e | 9 | #include <linux/file.h> |
7aaacb43 | 10 | #include <linux/fs.h> |
11 | #include <linux/kernel.h> | |
5a0e3ad6 | 12 | #include <linux/slab.h> |
93efc55b | 13 | #include <linux/stat.h> |
45296236 | 14 | #include <linux/module.h> |
93efc55b | 15 | #include <linux/moduleparam.h> |
7aaacb43 | 16 | #include <net/sock.h> |
4ce0a41f | 17 | |
05a1f28e TH |
18 | #include "usbip_common.h" |
19 | ||
4ce0a41f | 20 | #define DRIVER_AUTHOR "Takahiro Hirofuchi <hirofuchi@users.sourceforge.net>" |
64e62426 | 21 | #define DRIVER_DESC "USB/IP Core" |
05a1f28e | 22 | |
64e62426 | 23 | #ifdef CONFIG_USBIP_DEBUG |
05a1f28e TH |
24 | unsigned long usbip_debug_flag = 0xffffffff; |
25 | #else | |
26 | unsigned long usbip_debug_flag; | |
27 | #endif | |
28 | EXPORT_SYMBOL_GPL(usbip_debug_flag); | |
93efc55b TK |
29 | module_param(usbip_debug_flag, ulong, S_IRUGO|S_IWUSR); |
30 | MODULE_PARM_DESC(usbip_debug_flag, "debug flags (defined in usbip_common.h)"); | |
05a1f28e | 31 | |
05a1f28e TH |
32 | /* FIXME */ |
33 | struct device_attribute dev_attr_usbip_debug; | |
34 | EXPORT_SYMBOL_GPL(dev_attr_usbip_debug); | |
35 | ||
b1f56aca GKH |
36 | static ssize_t usbip_debug_show(struct device *dev, |
37 | struct device_attribute *attr, char *buf) | |
05a1f28e TH |
38 | { |
39 | return sprintf(buf, "%lx\n", usbip_debug_flag); | |
40 | } | |
41 | ||
b1f56aca GKH |
42 | static ssize_t usbip_debug_store(struct device *dev, |
43 | struct device_attribute *attr, const char *buf, | |
44 | size_t count) | |
05a1f28e | 45 | { |
bf988c16 JG |
46 | if (sscanf(buf, "%lx", &usbip_debug_flag) != 1) |
47 | return -EINVAL; | |
05a1f28e TH |
48 | return count; |
49 | } | |
b1f56aca | 50 | DEVICE_ATTR_RW(usbip_debug); |
05a1f28e TH |
51 | |
52 | static void usbip_dump_buffer(char *buff, int bufflen) | |
53 | { | |
1a4b6f66 | 54 | print_hex_dump(KERN_DEBUG, "usbip-core", DUMP_PREFIX_OFFSET, 16, 4, |
aad86577 | 55 | buff, bufflen, false); |
05a1f28e TH |
56 | } |
57 | ||
58 | static void usbip_dump_pipe(unsigned int p) | |
59 | { | |
60 | unsigned char type = usb_pipetype(p); | |
87352760 | 61 | unsigned char ep = usb_pipeendpoint(p); |
62 | unsigned char dev = usb_pipedevice(p); | |
63 | unsigned char dir = usb_pipein(p); | |
05a1f28e | 64 | |
1a4b6f66 | 65 | pr_debug("dev(%d) ep(%d) [%s] ", dev, ep, dir ? "IN" : "OUT"); |
05a1f28e TH |
66 | |
67 | switch (type) { | |
68 | case PIPE_ISOCHRONOUS: | |
1a4b6f66 | 69 | pr_debug("ISO\n"); |
05a1f28e TH |
70 | break; |
71 | case PIPE_INTERRUPT: | |
1a4b6f66 | 72 | pr_debug("INT\n"); |
05a1f28e TH |
73 | break; |
74 | case PIPE_CONTROL: | |
1a4b6f66 | 75 | pr_debug("CTRL\n"); |
05a1f28e TH |
76 | break; |
77 | case PIPE_BULK: | |
1a4b6f66 | 78 | pr_debug("BULK\n"); |
05a1f28e TH |
79 | break; |
80 | default: | |
1a4b6f66 | 81 | pr_debug("ERR\n"); |
49aecefc | 82 | break; |
05a1f28e | 83 | } |
05a1f28e TH |
84 | } |
85 | ||
86 | static void usbip_dump_usb_device(struct usb_device *udev) | |
87 | { | |
88 | struct device *dev = &udev->dev; | |
89 | int i; | |
90 | ||
09c8c8fb SK |
91 | dev_dbg(dev, " devnum(%d) devpath(%s) usb speed(%s)", |
92 | udev->devnum, udev->devpath, usb_speed_string(udev->speed)); | |
05a1f28e | 93 | |
1a4b6f66 | 94 | pr_debug("tt %p, ttport %d\n", udev->tt, udev->ttport); |
05a1f28e TH |
95 | |
96 | dev_dbg(dev, " "); | |
97 | for (i = 0; i < 16; i++) | |
1a4b6f66 | 98 | pr_debug(" %2u", i); |
99 | pr_debug("\n"); | |
05a1f28e TH |
100 | |
101 | dev_dbg(dev, " toggle0(IN) :"); | |
102 | for (i = 0; i < 16; i++) | |
1a4b6f66 | 103 | pr_debug(" %2u", (udev->toggle[0] & (1 << i)) ? 1 : 0); |
104 | pr_debug("\n"); | |
05a1f28e TH |
105 | |
106 | dev_dbg(dev, " toggle1(OUT):"); | |
107 | for (i = 0; i < 16; i++) | |
1a4b6f66 | 108 | pr_debug(" %2u", (udev->toggle[1] & (1 << i)) ? 1 : 0); |
109 | pr_debug("\n"); | |
05a1f28e TH |
110 | |
111 | dev_dbg(dev, " epmaxp_in :"); | |
112 | for (i = 0; i < 16; i++) { | |
113 | if (udev->ep_in[i]) | |
1a4b6f66 | 114 | pr_debug(" %2u", |
115 | le16_to_cpu(udev->ep_in[i]->desc.wMaxPacketSize)); | |
05a1f28e | 116 | } |
1a4b6f66 | 117 | pr_debug("\n"); |
05a1f28e TH |
118 | |
119 | dev_dbg(dev, " epmaxp_out :"); | |
120 | for (i = 0; i < 16; i++) { | |
121 | if (udev->ep_out[i]) | |
1a4b6f66 | 122 | pr_debug(" %2u", |
123 | le16_to_cpu(udev->ep_out[i]->desc.wMaxPacketSize)); | |
05a1f28e | 124 | } |
1a4b6f66 | 125 | pr_debug("\n"); |
05a1f28e TH |
126 | |
127 | dev_dbg(dev, "parent %p, bus %p\n", udev->parent, udev->bus); | |
128 | ||
b482da2b HS |
129 | dev_dbg(dev, |
130 | "descriptor %p, config %p, actconfig %p, rawdescriptors %p\n", | |
131 | &udev->descriptor, udev->config, | |
05a1f28e TH |
132 | udev->actconfig, udev->rawdescriptors); |
133 | ||
134 | dev_dbg(dev, "have_langid %d, string_langid %d\n", | |
135 | udev->have_langid, udev->string_langid); | |
136 | ||
ff823c79 | 137 | dev_dbg(dev, "maxchild %d\n", udev->maxchild); |
05a1f28e TH |
138 | } |
139 | ||
140 | static void usbip_dump_request_type(__u8 rt) | |
141 | { | |
142 | switch (rt & USB_RECIP_MASK) { | |
143 | case USB_RECIP_DEVICE: | |
1a4b6f66 | 144 | pr_debug("DEVICE"); |
05a1f28e TH |
145 | break; |
146 | case USB_RECIP_INTERFACE: | |
1a4b6f66 | 147 | pr_debug("INTERF"); |
05a1f28e TH |
148 | break; |
149 | case USB_RECIP_ENDPOINT: | |
1a4b6f66 | 150 | pr_debug("ENDPOI"); |
05a1f28e TH |
151 | break; |
152 | case USB_RECIP_OTHER: | |
1a4b6f66 | 153 | pr_debug("OTHER "); |
05a1f28e TH |
154 | break; |
155 | default: | |
1a4b6f66 | 156 | pr_debug("------"); |
49aecefc | 157 | break; |
05a1f28e TH |
158 | } |
159 | } | |
160 | ||
161 | static void usbip_dump_usb_ctrlrequest(struct usb_ctrlrequest *cmd) | |
162 | { | |
163 | if (!cmd) { | |
1a4b6f66 | 164 | pr_debug(" : null pointer\n"); |
05a1f28e TH |
165 | return; |
166 | } | |
167 | ||
1a4b6f66 | 168 | pr_debug(" "); |
6bb3ee69 CC |
169 | pr_debug("bRequestType(%02X) bRequest(%02X) wValue(%04X) wIndex(%04X) wLength(%04X) ", |
170 | cmd->bRequestType, cmd->bRequest, | |
1a4b6f66 | 171 | cmd->wValue, cmd->wIndex, cmd->wLength); |
172 | pr_debug("\n "); | |
05a1f28e TH |
173 | |
174 | if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) { | |
1a4b6f66 | 175 | pr_debug("STANDARD "); |
05a1f28e TH |
176 | switch (cmd->bRequest) { |
177 | case USB_REQ_GET_STATUS: | |
1a4b6f66 | 178 | pr_debug("GET_STATUS\n"); |
05a1f28e TH |
179 | break; |
180 | case USB_REQ_CLEAR_FEATURE: | |
1a4b6f66 | 181 | pr_debug("CLEAR_FEAT\n"); |
05a1f28e TH |
182 | break; |
183 | case USB_REQ_SET_FEATURE: | |
5ad7b85b | 184 | pr_debug("SET_FEAT\n"); |
05a1f28e TH |
185 | break; |
186 | case USB_REQ_SET_ADDRESS: | |
1a4b6f66 | 187 | pr_debug("SET_ADDRRS\n"); |
05a1f28e TH |
188 | break; |
189 | case USB_REQ_GET_DESCRIPTOR: | |
1a4b6f66 | 190 | pr_debug("GET_DESCRI\n"); |
05a1f28e TH |
191 | break; |
192 | case USB_REQ_SET_DESCRIPTOR: | |
1a4b6f66 | 193 | pr_debug("SET_DESCRI\n"); |
05a1f28e TH |
194 | break; |
195 | case USB_REQ_GET_CONFIGURATION: | |
1a4b6f66 | 196 | pr_debug("GET_CONFIG\n"); |
05a1f28e TH |
197 | break; |
198 | case USB_REQ_SET_CONFIGURATION: | |
1a4b6f66 | 199 | pr_debug("SET_CONFIG\n"); |
05a1f28e TH |
200 | break; |
201 | case USB_REQ_GET_INTERFACE: | |
1a4b6f66 | 202 | pr_debug("GET_INTERF\n"); |
05a1f28e TH |
203 | break; |
204 | case USB_REQ_SET_INTERFACE: | |
1a4b6f66 | 205 | pr_debug("SET_INTERF\n"); |
05a1f28e TH |
206 | break; |
207 | case USB_REQ_SYNCH_FRAME: | |
1a4b6f66 | 208 | pr_debug("SYNC_FRAME\n"); |
05a1f28e TH |
209 | break; |
210 | default: | |
5ad7b85b | 211 | pr_debug("REQ(%02X)\n", cmd->bRequest); |
49aecefc | 212 | break; |
05a1f28e | 213 | } |
05a1f28e | 214 | usbip_dump_request_type(cmd->bRequestType); |
1a4b6f66 | 215 | } else if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_CLASS) { |
5ad7b85b | 216 | pr_debug("CLASS\n"); |
1a4b6f66 | 217 | } else if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_VENDOR) { |
5ad7b85b | 218 | pr_debug("VENDOR\n"); |
1a4b6f66 | 219 | } else if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_RESERVED) { |
220 | pr_debug("RESERVED\n"); | |
221 | } | |
05a1f28e TH |
222 | } |
223 | ||
224 | void usbip_dump_urb(struct urb *urb) | |
225 | { | |
226 | struct device *dev; | |
227 | ||
228 | if (!urb) { | |
1a4b6f66 | 229 | pr_debug("urb: null pointer!!\n"); |
05a1f28e TH |
230 | return; |
231 | } | |
232 | ||
233 | if (!urb->dev) { | |
1a4b6f66 | 234 | pr_debug("urb->dev: null pointer!!\n"); |
05a1f28e TH |
235 | return; |
236 | } | |
1a4b6f66 | 237 | |
05a1f28e TH |
238 | dev = &urb->dev->dev; |
239 | ||
240 | dev_dbg(dev, " urb :%p\n", urb); | |
241 | dev_dbg(dev, " dev :%p\n", urb->dev); | |
242 | ||
243 | usbip_dump_usb_device(urb->dev); | |
244 | ||
245 | dev_dbg(dev, " pipe :%08x ", urb->pipe); | |
246 | ||
247 | usbip_dump_pipe(urb->pipe); | |
248 | ||
249 | dev_dbg(dev, " status :%d\n", urb->status); | |
250 | dev_dbg(dev, " transfer_flags :%08X\n", urb->transfer_flags); | |
251 | dev_dbg(dev, " transfer_buffer :%p\n", urb->transfer_buffer); | |
b8868e45 BM |
252 | dev_dbg(dev, " transfer_buffer_length:%d\n", |
253 | urb->transfer_buffer_length); | |
05a1f28e TH |
254 | dev_dbg(dev, " actual_length :%d\n", urb->actual_length); |
255 | dev_dbg(dev, " setup_packet :%p\n", urb->setup_packet); | |
256 | ||
257 | if (urb->setup_packet && usb_pipetype(urb->pipe) == PIPE_CONTROL) | |
f9eacc98 | 258 | usbip_dump_usb_ctrlrequest( |
05a1f28e TH |
259 | (struct usb_ctrlrequest *)urb->setup_packet); |
260 | ||
261 | dev_dbg(dev, " start_frame :%d\n", urb->start_frame); | |
262 | dev_dbg(dev, " number_of_packets :%d\n", urb->number_of_packets); | |
263 | dev_dbg(dev, " interval :%d\n", urb->interval); | |
264 | dev_dbg(dev, " error_count :%d\n", urb->error_count); | |
265 | dev_dbg(dev, " context :%p\n", urb->context); | |
266 | dev_dbg(dev, " complete :%p\n", urb->complete); | |
267 | } | |
268 | EXPORT_SYMBOL_GPL(usbip_dump_urb); | |
269 | ||
270 | void usbip_dump_header(struct usbip_header *pdu) | |
271 | { | |
1a4b6f66 | 272 | pr_debug("BASE: cmd %u seq %u devid %u dir %u ep %u\n", |
273 | pdu->base.command, | |
274 | pdu->base.seqnum, | |
275 | pdu->base.devid, | |
276 | pdu->base.direction, | |
277 | pdu->base.ep); | |
05a1f28e TH |
278 | |
279 | switch (pdu->base.command) { | |
280 | case USBIP_CMD_SUBMIT: | |
6bb3ee69 | 281 | pr_debug("USBIP_CMD_SUBMIT: x_flags %u x_len %u sf %u #p %d iv %d\n", |
1a4b6f66 | 282 | pdu->u.cmd_submit.transfer_flags, |
283 | pdu->u.cmd_submit.transfer_buffer_length, | |
284 | pdu->u.cmd_submit.start_frame, | |
285 | pdu->u.cmd_submit.number_of_packets, | |
286 | pdu->u.cmd_submit.interval); | |
f9eacc98 | 287 | break; |
05a1f28e | 288 | case USBIP_CMD_UNLINK: |
1a4b6f66 | 289 | pr_debug("USBIP_CMD_UNLINK: seq %u\n", |
290 | pdu->u.cmd_unlink.seqnum); | |
05a1f28e TH |
291 | break; |
292 | case USBIP_RET_SUBMIT: | |
1a4b6f66 | 293 | pr_debug("USBIP_RET_SUBMIT: st %d al %u sf %d #p %d ec %d\n", |
294 | pdu->u.ret_submit.status, | |
295 | pdu->u.ret_submit.actual_length, | |
296 | pdu->u.ret_submit.start_frame, | |
297 | pdu->u.ret_submit.number_of_packets, | |
298 | pdu->u.ret_submit.error_count); | |
299 | break; | |
05a1f28e | 300 | case USBIP_RET_UNLINK: |
1a4b6f66 | 301 | pr_debug("USBIP_RET_UNLINK: status %d\n", |
302 | pdu->u.ret_unlink.status); | |
05a1f28e TH |
303 | break; |
304 | default: | |
305 | /* NOT REACHED */ | |
1a4b6f66 | 306 | pr_err("unknown command\n"); |
49aecefc | 307 | break; |
05a1f28e TH |
308 | } |
309 | } | |
310 | EXPORT_SYMBOL_GPL(usbip_dump_header); | |
311 | ||
5a08c526 BW |
312 | /* Receive data over TCP/IP. */ |
313 | int usbip_recv(struct socket *sock, void *buf, int size) | |
05a1f28e TH |
314 | { |
315 | int result; | |
3995d161 AV |
316 | struct kvec iov = {.iov_base = buf, .iov_len = size}; |
317 | struct msghdr msg = {.msg_flags = MSG_NOSIGNAL}; | |
05a1f28e TH |
318 | int total = 0; |
319 | ||
90120d15 SK |
320 | if (!sock || !buf || !size) |
321 | return -EINVAL; | |
322 | ||
3995d161 | 323 | iov_iter_kvec(&msg.msg_iter, READ|ITER_KVEC, &iov, 1, size); |
05a1f28e | 324 | |
b8868e45 | 325 | usbip_dbg_xmit("enter\n"); |
05a1f28e | 326 | |
05a1f28e | 327 | do { |
90120d15 | 328 | msg_data_left(&msg); |
05a1f28e | 329 | sock->sk->sk_allocation = GFP_NOIO; |
3995d161 AV |
330 | |
331 | result = sock_recvmsg(sock, &msg, MSG_WAITALL); | |
90120d15 | 332 | if (result <= 0) |
05a1f28e | 333 | goto err; |
05a1f28e | 334 | |
05a1f28e | 335 | total += result; |
3995d161 | 336 | } while (msg_data_left(&msg)); |
05a1f28e | 337 | |
b8868e45 | 338 | if (usbip_dbg_flag_xmit) { |
5a08c526 BW |
339 | if (!in_interrupt()) |
340 | pr_debug("%-10s:", current->comm); | |
341 | else | |
342 | pr_debug("interrupt :"); | |
05a1f28e | 343 | |
5a08c526 | 344 | pr_debug("receiving....\n"); |
3995d161 AV |
345 | usbip_dump_buffer(buf, size); |
346 | pr_debug("received, osize %d ret %d size %zd total %d\n", | |
347 | size, result, msg_data_left(&msg), total); | |
05a1f28e TH |
348 | } |
349 | ||
350 | return total; | |
351 | ||
352 | err: | |
353 | return result; | |
354 | } | |
5a08c526 | 355 | EXPORT_SYMBOL_GPL(usbip_recv); |
05a1f28e | 356 | |
05a1f28e TH |
357 | /* there may be more cases to tweak the flags. */ |
358 | static unsigned int tweak_transfer_flags(unsigned int flags) | |
359 | { | |
85bcb5ee | 360 | flags &= ~URB_NO_TRANSFER_DMA_MAP; |
05a1f28e TH |
361 | return flags; |
362 | } | |
363 | ||
364 | static void usbip_pack_cmd_submit(struct usbip_header *pdu, struct urb *urb, | |
f9eacc98 | 365 | int pack) |
05a1f28e TH |
366 | { |
367 | struct usbip_header_cmd_submit *spdu = &pdu->u.cmd_submit; | |
368 | ||
369 | /* | |
370 | * Some members are not still implemented in usbip. I hope this issue | |
371 | * will be discussed when usbip is ported to other operating systems. | |
372 | */ | |
373 | if (pack) { | |
05a1f28e | 374 | spdu->transfer_flags = |
f9eacc98 | 375 | tweak_transfer_flags(urb->transfer_flags); |
05a1f28e TH |
376 | spdu->transfer_buffer_length = urb->transfer_buffer_length; |
377 | spdu->start_frame = urb->start_frame; | |
378 | spdu->number_of_packets = urb->number_of_packets; | |
379 | spdu->interval = urb->interval; | |
380 | } else { | |
05a1f28e | 381 | urb->transfer_flags = spdu->transfer_flags; |
05a1f28e TH |
382 | urb->transfer_buffer_length = spdu->transfer_buffer_length; |
383 | urb->start_frame = spdu->start_frame; | |
384 | urb->number_of_packets = spdu->number_of_packets; | |
385 | urb->interval = spdu->interval; | |
386 | } | |
387 | } | |
388 | ||
389 | static void usbip_pack_ret_submit(struct usbip_header *pdu, struct urb *urb, | |
f9eacc98 | 390 | int pack) |
05a1f28e TH |
391 | { |
392 | struct usbip_header_ret_submit *rpdu = &pdu->u.ret_submit; | |
393 | ||
394 | if (pack) { | |
05a1f28e TH |
395 | rpdu->status = urb->status; |
396 | rpdu->actual_length = urb->actual_length; | |
397 | rpdu->start_frame = urb->start_frame; | |
1325f85f | 398 | rpdu->number_of_packets = urb->number_of_packets; |
05a1f28e TH |
399 | rpdu->error_count = urb->error_count; |
400 | } else { | |
05a1f28e TH |
401 | urb->status = rpdu->status; |
402 | urb->actual_length = rpdu->actual_length; | |
403 | urb->start_frame = rpdu->start_frame; | |
1325f85f | 404 | urb->number_of_packets = rpdu->number_of_packets; |
05a1f28e TH |
405 | urb->error_count = rpdu->error_count; |
406 | } | |
407 | } | |
408 | ||
05a1f28e | 409 | void usbip_pack_pdu(struct usbip_header *pdu, struct urb *urb, int cmd, |
f9eacc98 | 410 | int pack) |
05a1f28e TH |
411 | { |
412 | switch (cmd) { | |
413 | case USBIP_CMD_SUBMIT: | |
414 | usbip_pack_cmd_submit(pdu, urb, pack); | |
415 | break; | |
416 | case USBIP_RET_SUBMIT: | |
417 | usbip_pack_ret_submit(pdu, urb, pack); | |
418 | break; | |
419 | default: | |
49aecefc | 420 | /* NOT REACHED */ |
1a4b6f66 | 421 | pr_err("unknown command\n"); |
49aecefc | 422 | break; |
05a1f28e TH |
423 | } |
424 | } | |
425 | EXPORT_SYMBOL_GPL(usbip_pack_pdu); | |
426 | ||
05a1f28e TH |
427 | static void correct_endian_basic(struct usbip_header_basic *base, int send) |
428 | { | |
429 | if (send) { | |
430 | base->command = cpu_to_be32(base->command); | |
431 | base->seqnum = cpu_to_be32(base->seqnum); | |
432 | base->devid = cpu_to_be32(base->devid); | |
433 | base->direction = cpu_to_be32(base->direction); | |
434 | base->ep = cpu_to_be32(base->ep); | |
435 | } else { | |
436 | base->command = be32_to_cpu(base->command); | |
437 | base->seqnum = be32_to_cpu(base->seqnum); | |
438 | base->devid = be32_to_cpu(base->devid); | |
439 | base->direction = be32_to_cpu(base->direction); | |
440 | base->ep = be32_to_cpu(base->ep); | |
441 | } | |
442 | } | |
443 | ||
444 | static void correct_endian_cmd_submit(struct usbip_header_cmd_submit *pdu, | |
f9eacc98 | 445 | int send) |
05a1f28e TH |
446 | { |
447 | if (send) { | |
448 | pdu->transfer_flags = cpu_to_be32(pdu->transfer_flags); | |
449 | ||
450 | cpu_to_be32s(&pdu->transfer_buffer_length); | |
451 | cpu_to_be32s(&pdu->start_frame); | |
452 | cpu_to_be32s(&pdu->number_of_packets); | |
453 | cpu_to_be32s(&pdu->interval); | |
454 | } else { | |
455 | pdu->transfer_flags = be32_to_cpu(pdu->transfer_flags); | |
456 | ||
457 | be32_to_cpus(&pdu->transfer_buffer_length); | |
458 | be32_to_cpus(&pdu->start_frame); | |
459 | be32_to_cpus(&pdu->number_of_packets); | |
460 | be32_to_cpus(&pdu->interval); | |
461 | } | |
462 | } | |
463 | ||
464 | static void correct_endian_ret_submit(struct usbip_header_ret_submit *pdu, | |
f9eacc98 | 465 | int send) |
05a1f28e TH |
466 | { |
467 | if (send) { | |
468 | cpu_to_be32s(&pdu->status); | |
469 | cpu_to_be32s(&pdu->actual_length); | |
470 | cpu_to_be32s(&pdu->start_frame); | |
1325f85f | 471 | cpu_to_be32s(&pdu->number_of_packets); |
05a1f28e TH |
472 | cpu_to_be32s(&pdu->error_count); |
473 | } else { | |
474 | be32_to_cpus(&pdu->status); | |
475 | be32_to_cpus(&pdu->actual_length); | |
476 | be32_to_cpus(&pdu->start_frame); | |
cacd18a8 | 477 | be32_to_cpus(&pdu->number_of_packets); |
05a1f28e TH |
478 | be32_to_cpus(&pdu->error_count); |
479 | } | |
480 | } | |
481 | ||
482 | static void correct_endian_cmd_unlink(struct usbip_header_cmd_unlink *pdu, | |
f9eacc98 | 483 | int send) |
05a1f28e TH |
484 | { |
485 | if (send) | |
486 | pdu->seqnum = cpu_to_be32(pdu->seqnum); | |
487 | else | |
488 | pdu->seqnum = be32_to_cpu(pdu->seqnum); | |
489 | } | |
490 | ||
491 | static void correct_endian_ret_unlink(struct usbip_header_ret_unlink *pdu, | |
f9eacc98 | 492 | int send) |
05a1f28e TH |
493 | { |
494 | if (send) | |
495 | cpu_to_be32s(&pdu->status); | |
496 | else | |
497 | be32_to_cpus(&pdu->status); | |
498 | } | |
499 | ||
500 | void usbip_header_correct_endian(struct usbip_header *pdu, int send) | |
501 | { | |
502 | __u32 cmd = 0; | |
503 | ||
504 | if (send) | |
505 | cmd = pdu->base.command; | |
506 | ||
507 | correct_endian_basic(&pdu->base, send); | |
508 | ||
509 | if (!send) | |
510 | cmd = pdu->base.command; | |
511 | ||
512 | switch (cmd) { | |
513 | case USBIP_CMD_SUBMIT: | |
514 | correct_endian_cmd_submit(&pdu->u.cmd_submit, send); | |
515 | break; | |
516 | case USBIP_RET_SUBMIT: | |
517 | correct_endian_ret_submit(&pdu->u.ret_submit, send); | |
518 | break; | |
519 | case USBIP_CMD_UNLINK: | |
520 | correct_endian_cmd_unlink(&pdu->u.cmd_unlink, send); | |
521 | break; | |
522 | case USBIP_RET_UNLINK: | |
523 | correct_endian_ret_unlink(&pdu->u.ret_unlink, send); | |
524 | break; | |
525 | default: | |
49aecefc | 526 | /* NOT REACHED */ |
1a4b6f66 | 527 | pr_err("unknown command\n"); |
49aecefc | 528 | break; |
05a1f28e TH |
529 | } |
530 | } | |
531 | EXPORT_SYMBOL_GPL(usbip_header_correct_endian); | |
532 | ||
2282e1fb | 533 | static void usbip_iso_packet_correct_endian( |
87352760 | 534 | struct usbip_iso_packet_descriptor *iso, int send) |
05a1f28e TH |
535 | { |
536 | /* does not need all members. but copy all simply. */ | |
537 | if (send) { | |
538 | iso->offset = cpu_to_be32(iso->offset); | |
539 | iso->length = cpu_to_be32(iso->length); | |
540 | iso->status = cpu_to_be32(iso->status); | |
541 | iso->actual_length = cpu_to_be32(iso->actual_length); | |
542 | } else { | |
543 | iso->offset = be32_to_cpu(iso->offset); | |
544 | iso->length = be32_to_cpu(iso->length); | |
545 | iso->status = be32_to_cpu(iso->status); | |
546 | iso->actual_length = be32_to_cpu(iso->actual_length); | |
547 | } | |
548 | } | |
549 | ||
550 | static void usbip_pack_iso(struct usbip_iso_packet_descriptor *iso, | |
f9eacc98 | 551 | struct usb_iso_packet_descriptor *uiso, int pack) |
05a1f28e TH |
552 | { |
553 | if (pack) { | |
554 | iso->offset = uiso->offset; | |
555 | iso->length = uiso->length; | |
556 | iso->status = uiso->status; | |
557 | iso->actual_length = uiso->actual_length; | |
558 | } else { | |
559 | uiso->offset = iso->offset; | |
560 | uiso->length = iso->length; | |
561 | uiso->status = iso->status; | |
562 | uiso->actual_length = iso->actual_length; | |
563 | } | |
564 | } | |
565 | ||
05a1f28e | 566 | /* must free buffer */ |
36ac9b05 BW |
567 | struct usbip_iso_packet_descriptor* |
568 | usbip_alloc_iso_desc_pdu(struct urb *urb, ssize_t *bufflen) | |
05a1f28e | 569 | { |
05a1f28e TH |
570 | struct usbip_iso_packet_descriptor *iso; |
571 | int np = urb->number_of_packets; | |
572 | ssize_t size = np * sizeof(*iso); | |
573 | int i; | |
574 | ||
36ac9b05 BW |
575 | iso = kzalloc(size, GFP_KERNEL); |
576 | if (!iso) | |
05a1f28e TH |
577 | return NULL; |
578 | ||
579 | for (i = 0; i < np; i++) { | |
36ac9b05 BW |
580 | usbip_pack_iso(&iso[i], &urb->iso_frame_desc[i], 1); |
581 | usbip_iso_packet_correct_endian(&iso[i], 1); | |
05a1f28e TH |
582 | } |
583 | ||
584 | *bufflen = size; | |
585 | ||
36ac9b05 | 586 | return iso; |
05a1f28e TH |
587 | } |
588 | EXPORT_SYMBOL_GPL(usbip_alloc_iso_desc_pdu); | |
589 | ||
590 | /* some members of urb must be substituted before. */ | |
591 | int usbip_recv_iso(struct usbip_device *ud, struct urb *urb) | |
592 | { | |
593 | void *buff; | |
594 | struct usbip_iso_packet_descriptor *iso; | |
595 | int np = urb->number_of_packets; | |
596 | int size = np * sizeof(*iso); | |
597 | int i; | |
598 | int ret; | |
28276a28 | 599 | int total_length = 0; |
05a1f28e TH |
600 | |
601 | if (!usb_pipeisoc(urb->pipe)) | |
602 | return 0; | |
603 | ||
604 | /* my Bluetooth dongle gets ISO URBs which are np = 0 */ | |
f14287b9 | 605 | if (np == 0) |
05a1f28e | 606 | return 0; |
05a1f28e TH |
607 | |
608 | buff = kzalloc(size, GFP_KERNEL); | |
609 | if (!buff) | |
610 | return -ENOMEM; | |
611 | ||
5a08c526 | 612 | ret = usbip_recv(ud->tcp_socket, buff, size); |
05a1f28e TH |
613 | if (ret != size) { |
614 | dev_err(&urb->dev->dev, "recv iso_frame_descriptor, %d\n", | |
615 | ret); | |
616 | kfree(buff); | |
617 | ||
c7af4c22 | 618 | if (ud->side == USBIP_STUB || ud->side == USBIP_VUDC) |
05a1f28e TH |
619 | usbip_event_add(ud, SDEV_EVENT_ERROR_TCP); |
620 | else | |
621 | usbip_event_add(ud, VDEV_EVENT_ERROR_TCP); | |
622 | ||
623 | return -EPIPE; | |
624 | } | |
625 | ||
36ac9b05 | 626 | iso = (struct usbip_iso_packet_descriptor *) buff; |
05a1f28e | 627 | for (i = 0; i < np; i++) { |
36ac9b05 BW |
628 | usbip_iso_packet_correct_endian(&iso[i], 0); |
629 | usbip_pack_iso(&iso[i], &urb->iso_frame_desc[i], 0); | |
28276a28 | 630 | total_length += urb->iso_frame_desc[i].actual_length; |
05a1f28e TH |
631 | } |
632 | ||
05a1f28e TH |
633 | kfree(buff); |
634 | ||
28276a28 AM |
635 | if (total_length != urb->actual_length) { |
636 | dev_err(&urb->dev->dev, | |
6bb3ee69 | 637 | "total length of iso packets %d not equal to actual length of buffer %d\n", |
f9eacc98 | 638 | total_length, urb->actual_length); |
28276a28 | 639 | |
c7af4c22 | 640 | if (ud->side == USBIP_STUB || ud->side == USBIP_VUDC) |
28276a28 AM |
641 | usbip_event_add(ud, SDEV_EVENT_ERROR_TCP); |
642 | else | |
643 | usbip_event_add(ud, VDEV_EVENT_ERROR_TCP); | |
644 | ||
645 | return -EPIPE; | |
646 | } | |
647 | ||
05a1f28e TH |
648 | return ret; |
649 | } | |
650 | EXPORT_SYMBOL_GPL(usbip_recv_iso); | |
651 | ||
28276a28 AM |
652 | /* |
653 | * This functions restores the padding which was removed for optimizing | |
654 | * the bandwidth during transfer over tcp/ip | |
655 | * | |
656 | * buffer and iso packets need to be stored and be in propeper endian in urb | |
657 | * before calling this function | |
658 | */ | |
ac2b41ac | 659 | void usbip_pad_iso(struct usbip_device *ud, struct urb *urb) |
28276a28 AM |
660 | { |
661 | int np = urb->number_of_packets; | |
662 | int i; | |
28276a28 AM |
663 | int actualoffset = urb->actual_length; |
664 | ||
665 | if (!usb_pipeisoc(urb->pipe)) | |
ac2b41ac | 666 | return; |
28276a28 AM |
667 | |
668 | /* if no packets or length of data is 0, then nothing to unpack */ | |
669 | if (np == 0 || urb->actual_length == 0) | |
ac2b41ac | 670 | return; |
28276a28 AM |
671 | |
672 | /* | |
673 | * if actual_length is transfer_buffer_length then no padding is | |
674 | * present. | |
c7f00899 | 675 | */ |
28276a28 | 676 | if (urb->actual_length == urb->transfer_buffer_length) |
ac2b41ac | 677 | return; |
28276a28 AM |
678 | |
679 | /* | |
9a284e5c | 680 | * loop over all packets from last to first (to prevent overwriting |
28276a28 AM |
681 | * memory when padding) and move them into the proper place |
682 | */ | |
683 | for (i = np-1; i > 0; i--) { | |
684 | actualoffset -= urb->iso_frame_desc[i].actual_length; | |
685 | memmove(urb->transfer_buffer + urb->iso_frame_desc[i].offset, | |
f9eacc98 | 686 | urb->transfer_buffer + actualoffset, |
687 | urb->iso_frame_desc[i].actual_length); | |
28276a28 | 688 | } |
28276a28 AM |
689 | } |
690 | EXPORT_SYMBOL_GPL(usbip_pad_iso); | |
05a1f28e TH |
691 | |
692 | /* some members of urb must be substituted before. */ | |
693 | int usbip_recv_xbuff(struct usbip_device *ud, struct urb *urb) | |
694 | { | |
695 | int ret; | |
696 | int size; | |
697 | ||
c7af4c22 | 698 | if (ud->side == USBIP_STUB || ud->side == USBIP_VUDC) { |
05a1f28e TH |
699 | /* the direction of urb must be OUT. */ |
700 | if (usb_pipein(urb->pipe)) | |
701 | return 0; | |
702 | ||
703 | size = urb->transfer_buffer_length; | |
704 | } else { | |
05a1f28e TH |
705 | /* the direction of urb must be IN. */ |
706 | if (usb_pipeout(urb->pipe)) | |
707 | return 0; | |
708 | ||
709 | size = urb->actual_length; | |
710 | } | |
711 | ||
712 | /* no need to recv xbuff */ | |
713 | if (!(size > 0)) | |
714 | return 0; | |
715 | ||
b348d7dd IK |
716 | if (size > urb->transfer_buffer_length) { |
717 | /* should not happen, probably malicious packet */ | |
718 | if (ud->side == USBIP_STUB) { | |
719 | usbip_event_add(ud, SDEV_EVENT_ERROR_TCP); | |
720 | return 0; | |
721 | } else { | |
722 | usbip_event_add(ud, VDEV_EVENT_ERROR_TCP); | |
723 | return -EPIPE; | |
724 | } | |
725 | } | |
726 | ||
5a08c526 | 727 | ret = usbip_recv(ud->tcp_socket, urb->transfer_buffer, size); |
05a1f28e TH |
728 | if (ret != size) { |
729 | dev_err(&urb->dev->dev, "recv xbuf, %d\n", ret); | |
c7af4c22 | 730 | if (ud->side == USBIP_STUB || ud->side == USBIP_VUDC) { |
05a1f28e TH |
731 | usbip_event_add(ud, SDEV_EVENT_ERROR_TCP); |
732 | } else { | |
733 | usbip_event_add(ud, VDEV_EVENT_ERROR_TCP); | |
734 | return -EPIPE; | |
735 | } | |
736 | } | |
737 | ||
738 | return ret; | |
739 | } | |
740 | EXPORT_SYMBOL_GPL(usbip_recv_xbuff); | |
741 | ||
3028d0ae | 742 | static int __init usbip_core_init(void) |
05a1f28e | 743 | { |
bb7871ad NI |
744 | int ret; |
745 | ||
bb7871ad NI |
746 | ret = usbip_init_eh(); |
747 | if (ret) | |
748 | return ret; | |
749 | ||
05a1f28e TH |
750 | return 0; |
751 | } | |
752 | ||
3028d0ae | 753 | static void __exit usbip_core_exit(void) |
05a1f28e | 754 | { |
bb7871ad | 755 | usbip_finish_eh(); |
05a1f28e TH |
756 | return; |
757 | } | |
758 | ||
3028d0ae | 759 | module_init(usbip_core_init); |
760 | module_exit(usbip_core_exit); | |
05a1f28e TH |
761 | |
762 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
763 | MODULE_DESCRIPTION(DRIVER_DESC); | |
764 | MODULE_LICENSE("GPL"); |