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Commit | Line | Data |
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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 | * This is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, | |
20 | * USA. | |
21 | */ | |
22 | ||
7aaacb43 | 23 | #include <asm/byteorder.h> |
05a1f28e | 24 | #include <linux/file.h> |
7aaacb43 | 25 | #include <linux/fs.h> |
26 | #include <linux/kernel.h> | |
5a0e3ad6 | 27 | #include <linux/slab.h> |
93efc55b | 28 | #include <linux/stat.h> |
45296236 | 29 | #include <linux/module.h> |
93efc55b | 30 | #include <linux/moduleparam.h> |
7aaacb43 | 31 | #include <net/sock.h> |
4ce0a41f | 32 | |
05a1f28e TH |
33 | #include "usbip_common.h" |
34 | ||
4ce0a41f | 35 | #define DRIVER_AUTHOR "Takahiro Hirofuchi <hirofuchi@users.sourceforge.net>" |
64e62426 | 36 | #define DRIVER_DESC "USB/IP Core" |
05a1f28e | 37 | |
64e62426 | 38 | #ifdef CONFIG_USBIP_DEBUG |
05a1f28e TH |
39 | unsigned long usbip_debug_flag = 0xffffffff; |
40 | #else | |
41 | unsigned long usbip_debug_flag; | |
42 | #endif | |
43 | EXPORT_SYMBOL_GPL(usbip_debug_flag); | |
93efc55b TK |
44 | module_param(usbip_debug_flag, ulong, S_IRUGO|S_IWUSR); |
45 | MODULE_PARM_DESC(usbip_debug_flag, "debug flags (defined in usbip_common.h)"); | |
05a1f28e | 46 | |
05a1f28e TH |
47 | /* FIXME */ |
48 | struct device_attribute dev_attr_usbip_debug; | |
49 | EXPORT_SYMBOL_GPL(dev_attr_usbip_debug); | |
50 | ||
b1f56aca GKH |
51 | static ssize_t usbip_debug_show(struct device *dev, |
52 | struct device_attribute *attr, char *buf) | |
05a1f28e TH |
53 | { |
54 | return sprintf(buf, "%lx\n", usbip_debug_flag); | |
55 | } | |
56 | ||
b1f56aca GKH |
57 | static ssize_t usbip_debug_store(struct device *dev, |
58 | struct device_attribute *attr, const char *buf, | |
59 | size_t count) | |
05a1f28e | 60 | { |
bf988c16 JG |
61 | if (sscanf(buf, "%lx", &usbip_debug_flag) != 1) |
62 | return -EINVAL; | |
05a1f28e TH |
63 | return count; |
64 | } | |
b1f56aca | 65 | DEVICE_ATTR_RW(usbip_debug); |
05a1f28e TH |
66 | |
67 | static void usbip_dump_buffer(char *buff, int bufflen) | |
68 | { | |
1a4b6f66 | 69 | print_hex_dump(KERN_DEBUG, "usbip-core", DUMP_PREFIX_OFFSET, 16, 4, |
aad86577 | 70 | buff, bufflen, false); |
05a1f28e TH |
71 | } |
72 | ||
73 | static void usbip_dump_pipe(unsigned int p) | |
74 | { | |
75 | unsigned char type = usb_pipetype(p); | |
87352760 | 76 | unsigned char ep = usb_pipeendpoint(p); |
77 | unsigned char dev = usb_pipedevice(p); | |
78 | unsigned char dir = usb_pipein(p); | |
05a1f28e | 79 | |
1a4b6f66 | 80 | pr_debug("dev(%d) ep(%d) [%s] ", dev, ep, dir ? "IN" : "OUT"); |
05a1f28e TH |
81 | |
82 | switch (type) { | |
83 | case PIPE_ISOCHRONOUS: | |
1a4b6f66 | 84 | pr_debug("ISO\n"); |
05a1f28e TH |
85 | break; |
86 | case PIPE_INTERRUPT: | |
1a4b6f66 | 87 | pr_debug("INT\n"); |
05a1f28e TH |
88 | break; |
89 | case PIPE_CONTROL: | |
1a4b6f66 | 90 | pr_debug("CTRL\n"); |
05a1f28e TH |
91 | break; |
92 | case PIPE_BULK: | |
1a4b6f66 | 93 | pr_debug("BULK\n"); |
05a1f28e TH |
94 | break; |
95 | default: | |
1a4b6f66 | 96 | pr_debug("ERR\n"); |
49aecefc | 97 | break; |
05a1f28e | 98 | } |
05a1f28e TH |
99 | } |
100 | ||
101 | static void usbip_dump_usb_device(struct usb_device *udev) | |
102 | { | |
103 | struct device *dev = &udev->dev; | |
104 | int i; | |
105 | ||
09c8c8fb SK |
106 | dev_dbg(dev, " devnum(%d) devpath(%s) usb speed(%s)", |
107 | udev->devnum, udev->devpath, usb_speed_string(udev->speed)); | |
05a1f28e | 108 | |
1a4b6f66 | 109 | pr_debug("tt %p, ttport %d\n", udev->tt, udev->ttport); |
05a1f28e TH |
110 | |
111 | dev_dbg(dev, " "); | |
112 | for (i = 0; i < 16; i++) | |
1a4b6f66 | 113 | pr_debug(" %2u", i); |
114 | pr_debug("\n"); | |
05a1f28e TH |
115 | |
116 | dev_dbg(dev, " toggle0(IN) :"); | |
117 | for (i = 0; i < 16; i++) | |
1a4b6f66 | 118 | pr_debug(" %2u", (udev->toggle[0] & (1 << i)) ? 1 : 0); |
119 | pr_debug("\n"); | |
05a1f28e TH |
120 | |
121 | dev_dbg(dev, " toggle1(OUT):"); | |
122 | for (i = 0; i < 16; i++) | |
1a4b6f66 | 123 | pr_debug(" %2u", (udev->toggle[1] & (1 << i)) ? 1 : 0); |
124 | pr_debug("\n"); | |
05a1f28e TH |
125 | |
126 | dev_dbg(dev, " epmaxp_in :"); | |
127 | for (i = 0; i < 16; i++) { | |
128 | if (udev->ep_in[i]) | |
1a4b6f66 | 129 | pr_debug(" %2u", |
130 | le16_to_cpu(udev->ep_in[i]->desc.wMaxPacketSize)); | |
05a1f28e | 131 | } |
1a4b6f66 | 132 | pr_debug("\n"); |
05a1f28e TH |
133 | |
134 | dev_dbg(dev, " epmaxp_out :"); | |
135 | for (i = 0; i < 16; i++) { | |
136 | if (udev->ep_out[i]) | |
1a4b6f66 | 137 | pr_debug(" %2u", |
138 | le16_to_cpu(udev->ep_out[i]->desc.wMaxPacketSize)); | |
05a1f28e | 139 | } |
1a4b6f66 | 140 | pr_debug("\n"); |
05a1f28e TH |
141 | |
142 | dev_dbg(dev, "parent %p, bus %p\n", udev->parent, udev->bus); | |
143 | ||
b482da2b HS |
144 | dev_dbg(dev, |
145 | "descriptor %p, config %p, actconfig %p, rawdescriptors %p\n", | |
146 | &udev->descriptor, udev->config, | |
05a1f28e TH |
147 | udev->actconfig, udev->rawdescriptors); |
148 | ||
149 | dev_dbg(dev, "have_langid %d, string_langid %d\n", | |
150 | udev->have_langid, udev->string_langid); | |
151 | ||
ff823c79 | 152 | dev_dbg(dev, "maxchild %d\n", udev->maxchild); |
05a1f28e TH |
153 | } |
154 | ||
155 | static void usbip_dump_request_type(__u8 rt) | |
156 | { | |
157 | switch (rt & USB_RECIP_MASK) { | |
158 | case USB_RECIP_DEVICE: | |
1a4b6f66 | 159 | pr_debug("DEVICE"); |
05a1f28e TH |
160 | break; |
161 | case USB_RECIP_INTERFACE: | |
1a4b6f66 | 162 | pr_debug("INTERF"); |
05a1f28e TH |
163 | break; |
164 | case USB_RECIP_ENDPOINT: | |
1a4b6f66 | 165 | pr_debug("ENDPOI"); |
05a1f28e TH |
166 | break; |
167 | case USB_RECIP_OTHER: | |
1a4b6f66 | 168 | pr_debug("OTHER "); |
05a1f28e TH |
169 | break; |
170 | default: | |
1a4b6f66 | 171 | pr_debug("------"); |
49aecefc | 172 | break; |
05a1f28e TH |
173 | } |
174 | } | |
175 | ||
176 | static void usbip_dump_usb_ctrlrequest(struct usb_ctrlrequest *cmd) | |
177 | { | |
178 | if (!cmd) { | |
1a4b6f66 | 179 | pr_debug(" : null pointer\n"); |
05a1f28e TH |
180 | return; |
181 | } | |
182 | ||
1a4b6f66 | 183 | pr_debug(" "); |
6bb3ee69 CC |
184 | pr_debug("bRequestType(%02X) bRequest(%02X) wValue(%04X) wIndex(%04X) wLength(%04X) ", |
185 | cmd->bRequestType, cmd->bRequest, | |
1a4b6f66 | 186 | cmd->wValue, cmd->wIndex, cmd->wLength); |
187 | pr_debug("\n "); | |
05a1f28e TH |
188 | |
189 | if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) { | |
1a4b6f66 | 190 | pr_debug("STANDARD "); |
05a1f28e TH |
191 | switch (cmd->bRequest) { |
192 | case USB_REQ_GET_STATUS: | |
1a4b6f66 | 193 | pr_debug("GET_STATUS\n"); |
05a1f28e TH |
194 | break; |
195 | case USB_REQ_CLEAR_FEATURE: | |
1a4b6f66 | 196 | pr_debug("CLEAR_FEAT\n"); |
05a1f28e TH |
197 | break; |
198 | case USB_REQ_SET_FEATURE: | |
5ad7b85b | 199 | pr_debug("SET_FEAT\n"); |
05a1f28e TH |
200 | break; |
201 | case USB_REQ_SET_ADDRESS: | |
1a4b6f66 | 202 | pr_debug("SET_ADDRRS\n"); |
05a1f28e TH |
203 | break; |
204 | case USB_REQ_GET_DESCRIPTOR: | |
1a4b6f66 | 205 | pr_debug("GET_DESCRI\n"); |
05a1f28e TH |
206 | break; |
207 | case USB_REQ_SET_DESCRIPTOR: | |
1a4b6f66 | 208 | pr_debug("SET_DESCRI\n"); |
05a1f28e TH |
209 | break; |
210 | case USB_REQ_GET_CONFIGURATION: | |
1a4b6f66 | 211 | pr_debug("GET_CONFIG\n"); |
05a1f28e TH |
212 | break; |
213 | case USB_REQ_SET_CONFIGURATION: | |
1a4b6f66 | 214 | pr_debug("SET_CONFIG\n"); |
05a1f28e TH |
215 | break; |
216 | case USB_REQ_GET_INTERFACE: | |
1a4b6f66 | 217 | pr_debug("GET_INTERF\n"); |
05a1f28e TH |
218 | break; |
219 | case USB_REQ_SET_INTERFACE: | |
1a4b6f66 | 220 | pr_debug("SET_INTERF\n"); |
05a1f28e TH |
221 | break; |
222 | case USB_REQ_SYNCH_FRAME: | |
1a4b6f66 | 223 | pr_debug("SYNC_FRAME\n"); |
05a1f28e TH |
224 | break; |
225 | default: | |
5ad7b85b | 226 | pr_debug("REQ(%02X)\n", cmd->bRequest); |
49aecefc | 227 | break; |
05a1f28e | 228 | } |
05a1f28e | 229 | usbip_dump_request_type(cmd->bRequestType); |
1a4b6f66 | 230 | } else if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_CLASS) { |
5ad7b85b | 231 | pr_debug("CLASS\n"); |
1a4b6f66 | 232 | } else if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_VENDOR) { |
5ad7b85b | 233 | pr_debug("VENDOR\n"); |
1a4b6f66 | 234 | } else if ((cmd->bRequestType & USB_TYPE_MASK) == USB_TYPE_RESERVED) { |
235 | pr_debug("RESERVED\n"); | |
236 | } | |
05a1f28e TH |
237 | } |
238 | ||
239 | void usbip_dump_urb(struct urb *urb) | |
240 | { | |
241 | struct device *dev; | |
242 | ||
243 | if (!urb) { | |
1a4b6f66 | 244 | pr_debug("urb: null pointer!!\n"); |
05a1f28e TH |
245 | return; |
246 | } | |
247 | ||
248 | if (!urb->dev) { | |
1a4b6f66 | 249 | pr_debug("urb->dev: null pointer!!\n"); |
05a1f28e TH |
250 | return; |
251 | } | |
1a4b6f66 | 252 | |
05a1f28e TH |
253 | dev = &urb->dev->dev; |
254 | ||
255 | dev_dbg(dev, " urb :%p\n", urb); | |
256 | dev_dbg(dev, " dev :%p\n", urb->dev); | |
257 | ||
258 | usbip_dump_usb_device(urb->dev); | |
259 | ||
260 | dev_dbg(dev, " pipe :%08x ", urb->pipe); | |
261 | ||
262 | usbip_dump_pipe(urb->pipe); | |
263 | ||
264 | dev_dbg(dev, " status :%d\n", urb->status); | |
265 | dev_dbg(dev, " transfer_flags :%08X\n", urb->transfer_flags); | |
266 | dev_dbg(dev, " transfer_buffer :%p\n", urb->transfer_buffer); | |
b8868e45 BM |
267 | dev_dbg(dev, " transfer_buffer_length:%d\n", |
268 | urb->transfer_buffer_length); | |
05a1f28e TH |
269 | dev_dbg(dev, " actual_length :%d\n", urb->actual_length); |
270 | dev_dbg(dev, " setup_packet :%p\n", urb->setup_packet); | |
271 | ||
272 | if (urb->setup_packet && usb_pipetype(urb->pipe) == PIPE_CONTROL) | |
f9eacc98 | 273 | usbip_dump_usb_ctrlrequest( |
05a1f28e TH |
274 | (struct usb_ctrlrequest *)urb->setup_packet); |
275 | ||
276 | dev_dbg(dev, " start_frame :%d\n", urb->start_frame); | |
277 | dev_dbg(dev, " number_of_packets :%d\n", urb->number_of_packets); | |
278 | dev_dbg(dev, " interval :%d\n", urb->interval); | |
279 | dev_dbg(dev, " error_count :%d\n", urb->error_count); | |
280 | dev_dbg(dev, " context :%p\n", urb->context); | |
281 | dev_dbg(dev, " complete :%p\n", urb->complete); | |
282 | } | |
283 | EXPORT_SYMBOL_GPL(usbip_dump_urb); | |
284 | ||
285 | void usbip_dump_header(struct usbip_header *pdu) | |
286 | { | |
1a4b6f66 | 287 | pr_debug("BASE: cmd %u seq %u devid %u dir %u ep %u\n", |
288 | pdu->base.command, | |
289 | pdu->base.seqnum, | |
290 | pdu->base.devid, | |
291 | pdu->base.direction, | |
292 | pdu->base.ep); | |
05a1f28e TH |
293 | |
294 | switch (pdu->base.command) { | |
295 | case USBIP_CMD_SUBMIT: | |
6bb3ee69 | 296 | pr_debug("USBIP_CMD_SUBMIT: x_flags %u x_len %u sf %u #p %d iv %d\n", |
1a4b6f66 | 297 | pdu->u.cmd_submit.transfer_flags, |
298 | pdu->u.cmd_submit.transfer_buffer_length, | |
299 | pdu->u.cmd_submit.start_frame, | |
300 | pdu->u.cmd_submit.number_of_packets, | |
301 | pdu->u.cmd_submit.interval); | |
f9eacc98 | 302 | break; |
05a1f28e | 303 | case USBIP_CMD_UNLINK: |
1a4b6f66 | 304 | pr_debug("USBIP_CMD_UNLINK: seq %u\n", |
305 | pdu->u.cmd_unlink.seqnum); | |
05a1f28e TH |
306 | break; |
307 | case USBIP_RET_SUBMIT: | |
1a4b6f66 | 308 | pr_debug("USBIP_RET_SUBMIT: st %d al %u sf %d #p %d ec %d\n", |
309 | pdu->u.ret_submit.status, | |
310 | pdu->u.ret_submit.actual_length, | |
311 | pdu->u.ret_submit.start_frame, | |
312 | pdu->u.ret_submit.number_of_packets, | |
313 | pdu->u.ret_submit.error_count); | |
314 | break; | |
05a1f28e | 315 | case USBIP_RET_UNLINK: |
1a4b6f66 | 316 | pr_debug("USBIP_RET_UNLINK: status %d\n", |
317 | pdu->u.ret_unlink.status); | |
05a1f28e TH |
318 | break; |
319 | default: | |
320 | /* NOT REACHED */ | |
1a4b6f66 | 321 | pr_err("unknown command\n"); |
49aecefc | 322 | break; |
05a1f28e TH |
323 | } |
324 | } | |
325 | EXPORT_SYMBOL_GPL(usbip_dump_header); | |
326 | ||
5a08c526 BW |
327 | /* Receive data over TCP/IP. */ |
328 | int usbip_recv(struct socket *sock, void *buf, int size) | |
05a1f28e TH |
329 | { |
330 | int result; | |
3995d161 AV |
331 | struct kvec iov = {.iov_base = buf, .iov_len = size}; |
332 | struct msghdr msg = {.msg_flags = MSG_NOSIGNAL}; | |
05a1f28e TH |
333 | int total = 0; |
334 | ||
3995d161 | 335 | iov_iter_kvec(&msg.msg_iter, READ|ITER_KVEC, &iov, 1, size); |
05a1f28e | 336 | |
b8868e45 | 337 | usbip_dbg_xmit("enter\n"); |
05a1f28e TH |
338 | |
339 | if (!sock || !buf || !size) { | |
1a4b6f66 | 340 | pr_err("invalid arg, sock %p buff %p size %d\n", sock, buf, |
341 | size); | |
05a1f28e TH |
342 | return -EINVAL; |
343 | } | |
344 | ||
05a1f28e | 345 | do { |
3995d161 | 346 | int sz = msg_data_left(&msg); |
05a1f28e | 347 | sock->sk->sk_allocation = GFP_NOIO; |
3995d161 AV |
348 | |
349 | result = sock_recvmsg(sock, &msg, MSG_WAITALL); | |
05a1f28e | 350 | if (result <= 0) { |
5a08c526 | 351 | pr_debug("receive sock %p buf %p size %u ret %d total %d\n", |
3995d161 | 352 | sock, buf + total, sz, result, total); |
05a1f28e TH |
353 | goto err; |
354 | } | |
355 | ||
05a1f28e | 356 | total += result; |
3995d161 | 357 | } while (msg_data_left(&msg)); |
05a1f28e | 358 | |
b8868e45 | 359 | if (usbip_dbg_flag_xmit) { |
5a08c526 BW |
360 | if (!in_interrupt()) |
361 | pr_debug("%-10s:", current->comm); | |
362 | else | |
363 | pr_debug("interrupt :"); | |
05a1f28e | 364 | |
5a08c526 | 365 | pr_debug("receiving....\n"); |
3995d161 AV |
366 | usbip_dump_buffer(buf, size); |
367 | pr_debug("received, osize %d ret %d size %zd total %d\n", | |
368 | size, result, msg_data_left(&msg), total); | |
05a1f28e TH |
369 | } |
370 | ||
371 | return total; | |
372 | ||
373 | err: | |
374 | return result; | |
375 | } | |
5a08c526 | 376 | EXPORT_SYMBOL_GPL(usbip_recv); |
05a1f28e | 377 | |
05a1f28e TH |
378 | /* there may be more cases to tweak the flags. */ |
379 | static unsigned int tweak_transfer_flags(unsigned int flags) | |
380 | { | |
85bcb5ee | 381 | flags &= ~URB_NO_TRANSFER_DMA_MAP; |
05a1f28e TH |
382 | return flags; |
383 | } | |
384 | ||
385 | static void usbip_pack_cmd_submit(struct usbip_header *pdu, struct urb *urb, | |
f9eacc98 | 386 | int pack) |
05a1f28e TH |
387 | { |
388 | struct usbip_header_cmd_submit *spdu = &pdu->u.cmd_submit; | |
389 | ||
390 | /* | |
391 | * Some members are not still implemented in usbip. I hope this issue | |
392 | * will be discussed when usbip is ported to other operating systems. | |
393 | */ | |
394 | if (pack) { | |
05a1f28e | 395 | spdu->transfer_flags = |
f9eacc98 | 396 | tweak_transfer_flags(urb->transfer_flags); |
05a1f28e TH |
397 | spdu->transfer_buffer_length = urb->transfer_buffer_length; |
398 | spdu->start_frame = urb->start_frame; | |
399 | spdu->number_of_packets = urb->number_of_packets; | |
400 | spdu->interval = urb->interval; | |
401 | } else { | |
05a1f28e | 402 | urb->transfer_flags = spdu->transfer_flags; |
05a1f28e TH |
403 | urb->transfer_buffer_length = spdu->transfer_buffer_length; |
404 | urb->start_frame = spdu->start_frame; | |
405 | urb->number_of_packets = spdu->number_of_packets; | |
406 | urb->interval = spdu->interval; | |
407 | } | |
408 | } | |
409 | ||
410 | static void usbip_pack_ret_submit(struct usbip_header *pdu, struct urb *urb, | |
f9eacc98 | 411 | int pack) |
05a1f28e TH |
412 | { |
413 | struct usbip_header_ret_submit *rpdu = &pdu->u.ret_submit; | |
414 | ||
415 | if (pack) { | |
05a1f28e TH |
416 | rpdu->status = urb->status; |
417 | rpdu->actual_length = urb->actual_length; | |
418 | rpdu->start_frame = urb->start_frame; | |
1325f85f | 419 | rpdu->number_of_packets = urb->number_of_packets; |
05a1f28e TH |
420 | rpdu->error_count = urb->error_count; |
421 | } else { | |
05a1f28e TH |
422 | urb->status = rpdu->status; |
423 | urb->actual_length = rpdu->actual_length; | |
424 | urb->start_frame = rpdu->start_frame; | |
1325f85f | 425 | urb->number_of_packets = rpdu->number_of_packets; |
05a1f28e TH |
426 | urb->error_count = rpdu->error_count; |
427 | } | |
428 | } | |
429 | ||
05a1f28e | 430 | void usbip_pack_pdu(struct usbip_header *pdu, struct urb *urb, int cmd, |
f9eacc98 | 431 | int pack) |
05a1f28e TH |
432 | { |
433 | switch (cmd) { | |
434 | case USBIP_CMD_SUBMIT: | |
435 | usbip_pack_cmd_submit(pdu, urb, pack); | |
436 | break; | |
437 | case USBIP_RET_SUBMIT: | |
438 | usbip_pack_ret_submit(pdu, urb, pack); | |
439 | break; | |
440 | default: | |
49aecefc | 441 | /* NOT REACHED */ |
1a4b6f66 | 442 | pr_err("unknown command\n"); |
49aecefc | 443 | break; |
05a1f28e TH |
444 | } |
445 | } | |
446 | EXPORT_SYMBOL_GPL(usbip_pack_pdu); | |
447 | ||
05a1f28e TH |
448 | static void correct_endian_basic(struct usbip_header_basic *base, int send) |
449 | { | |
450 | if (send) { | |
451 | base->command = cpu_to_be32(base->command); | |
452 | base->seqnum = cpu_to_be32(base->seqnum); | |
453 | base->devid = cpu_to_be32(base->devid); | |
454 | base->direction = cpu_to_be32(base->direction); | |
455 | base->ep = cpu_to_be32(base->ep); | |
456 | } else { | |
457 | base->command = be32_to_cpu(base->command); | |
458 | base->seqnum = be32_to_cpu(base->seqnum); | |
459 | base->devid = be32_to_cpu(base->devid); | |
460 | base->direction = be32_to_cpu(base->direction); | |
461 | base->ep = be32_to_cpu(base->ep); | |
462 | } | |
463 | } | |
464 | ||
465 | static void correct_endian_cmd_submit(struct usbip_header_cmd_submit *pdu, | |
f9eacc98 | 466 | int send) |
05a1f28e TH |
467 | { |
468 | if (send) { | |
469 | pdu->transfer_flags = cpu_to_be32(pdu->transfer_flags); | |
470 | ||
471 | cpu_to_be32s(&pdu->transfer_buffer_length); | |
472 | cpu_to_be32s(&pdu->start_frame); | |
473 | cpu_to_be32s(&pdu->number_of_packets); | |
474 | cpu_to_be32s(&pdu->interval); | |
475 | } else { | |
476 | pdu->transfer_flags = be32_to_cpu(pdu->transfer_flags); | |
477 | ||
478 | be32_to_cpus(&pdu->transfer_buffer_length); | |
479 | be32_to_cpus(&pdu->start_frame); | |
480 | be32_to_cpus(&pdu->number_of_packets); | |
481 | be32_to_cpus(&pdu->interval); | |
482 | } | |
483 | } | |
484 | ||
485 | static void correct_endian_ret_submit(struct usbip_header_ret_submit *pdu, | |
f9eacc98 | 486 | int send) |
05a1f28e TH |
487 | { |
488 | if (send) { | |
489 | cpu_to_be32s(&pdu->status); | |
490 | cpu_to_be32s(&pdu->actual_length); | |
491 | cpu_to_be32s(&pdu->start_frame); | |
1325f85f | 492 | cpu_to_be32s(&pdu->number_of_packets); |
05a1f28e TH |
493 | cpu_to_be32s(&pdu->error_count); |
494 | } else { | |
495 | be32_to_cpus(&pdu->status); | |
496 | be32_to_cpus(&pdu->actual_length); | |
497 | be32_to_cpus(&pdu->start_frame); | |
cacd18a8 | 498 | be32_to_cpus(&pdu->number_of_packets); |
05a1f28e TH |
499 | be32_to_cpus(&pdu->error_count); |
500 | } | |
501 | } | |
502 | ||
503 | static void correct_endian_cmd_unlink(struct usbip_header_cmd_unlink *pdu, | |
f9eacc98 | 504 | int send) |
05a1f28e TH |
505 | { |
506 | if (send) | |
507 | pdu->seqnum = cpu_to_be32(pdu->seqnum); | |
508 | else | |
509 | pdu->seqnum = be32_to_cpu(pdu->seqnum); | |
510 | } | |
511 | ||
512 | static void correct_endian_ret_unlink(struct usbip_header_ret_unlink *pdu, | |
f9eacc98 | 513 | int send) |
05a1f28e TH |
514 | { |
515 | if (send) | |
516 | cpu_to_be32s(&pdu->status); | |
517 | else | |
518 | be32_to_cpus(&pdu->status); | |
519 | } | |
520 | ||
521 | void usbip_header_correct_endian(struct usbip_header *pdu, int send) | |
522 | { | |
523 | __u32 cmd = 0; | |
524 | ||
525 | if (send) | |
526 | cmd = pdu->base.command; | |
527 | ||
528 | correct_endian_basic(&pdu->base, send); | |
529 | ||
530 | if (!send) | |
531 | cmd = pdu->base.command; | |
532 | ||
533 | switch (cmd) { | |
534 | case USBIP_CMD_SUBMIT: | |
535 | correct_endian_cmd_submit(&pdu->u.cmd_submit, send); | |
536 | break; | |
537 | case USBIP_RET_SUBMIT: | |
538 | correct_endian_ret_submit(&pdu->u.ret_submit, send); | |
539 | break; | |
540 | case USBIP_CMD_UNLINK: | |
541 | correct_endian_cmd_unlink(&pdu->u.cmd_unlink, send); | |
542 | break; | |
543 | case USBIP_RET_UNLINK: | |
544 | correct_endian_ret_unlink(&pdu->u.ret_unlink, send); | |
545 | break; | |
546 | default: | |
49aecefc | 547 | /* NOT REACHED */ |
1a4b6f66 | 548 | pr_err("unknown command\n"); |
49aecefc | 549 | break; |
05a1f28e TH |
550 | } |
551 | } | |
552 | EXPORT_SYMBOL_GPL(usbip_header_correct_endian); | |
553 | ||
2282e1fb | 554 | static void usbip_iso_packet_correct_endian( |
87352760 | 555 | struct usbip_iso_packet_descriptor *iso, int send) |
05a1f28e TH |
556 | { |
557 | /* does not need all members. but copy all simply. */ | |
558 | if (send) { | |
559 | iso->offset = cpu_to_be32(iso->offset); | |
560 | iso->length = cpu_to_be32(iso->length); | |
561 | iso->status = cpu_to_be32(iso->status); | |
562 | iso->actual_length = cpu_to_be32(iso->actual_length); | |
563 | } else { | |
564 | iso->offset = be32_to_cpu(iso->offset); | |
565 | iso->length = be32_to_cpu(iso->length); | |
566 | iso->status = be32_to_cpu(iso->status); | |
567 | iso->actual_length = be32_to_cpu(iso->actual_length); | |
568 | } | |
569 | } | |
570 | ||
571 | static void usbip_pack_iso(struct usbip_iso_packet_descriptor *iso, | |
f9eacc98 | 572 | struct usb_iso_packet_descriptor *uiso, int pack) |
05a1f28e TH |
573 | { |
574 | if (pack) { | |
575 | iso->offset = uiso->offset; | |
576 | iso->length = uiso->length; | |
577 | iso->status = uiso->status; | |
578 | iso->actual_length = uiso->actual_length; | |
579 | } else { | |
580 | uiso->offset = iso->offset; | |
581 | uiso->length = iso->length; | |
582 | uiso->status = iso->status; | |
583 | uiso->actual_length = iso->actual_length; | |
584 | } | |
585 | } | |
586 | ||
05a1f28e | 587 | /* must free buffer */ |
36ac9b05 BW |
588 | struct usbip_iso_packet_descriptor* |
589 | usbip_alloc_iso_desc_pdu(struct urb *urb, ssize_t *bufflen) | |
05a1f28e | 590 | { |
05a1f28e TH |
591 | struct usbip_iso_packet_descriptor *iso; |
592 | int np = urb->number_of_packets; | |
593 | ssize_t size = np * sizeof(*iso); | |
594 | int i; | |
595 | ||
36ac9b05 BW |
596 | iso = kzalloc(size, GFP_KERNEL); |
597 | if (!iso) | |
05a1f28e TH |
598 | return NULL; |
599 | ||
600 | for (i = 0; i < np; i++) { | |
36ac9b05 BW |
601 | usbip_pack_iso(&iso[i], &urb->iso_frame_desc[i], 1); |
602 | usbip_iso_packet_correct_endian(&iso[i], 1); | |
05a1f28e TH |
603 | } |
604 | ||
605 | *bufflen = size; | |
606 | ||
36ac9b05 | 607 | return iso; |
05a1f28e TH |
608 | } |
609 | EXPORT_SYMBOL_GPL(usbip_alloc_iso_desc_pdu); | |
610 | ||
611 | /* some members of urb must be substituted before. */ | |
612 | int usbip_recv_iso(struct usbip_device *ud, struct urb *urb) | |
613 | { | |
614 | void *buff; | |
615 | struct usbip_iso_packet_descriptor *iso; | |
616 | int np = urb->number_of_packets; | |
617 | int size = np * sizeof(*iso); | |
618 | int i; | |
619 | int ret; | |
28276a28 | 620 | int total_length = 0; |
05a1f28e TH |
621 | |
622 | if (!usb_pipeisoc(urb->pipe)) | |
623 | return 0; | |
624 | ||
625 | /* my Bluetooth dongle gets ISO URBs which are np = 0 */ | |
f14287b9 | 626 | if (np == 0) |
05a1f28e | 627 | return 0; |
05a1f28e TH |
628 | |
629 | buff = kzalloc(size, GFP_KERNEL); | |
630 | if (!buff) | |
631 | return -ENOMEM; | |
632 | ||
5a08c526 | 633 | ret = usbip_recv(ud->tcp_socket, buff, size); |
05a1f28e TH |
634 | if (ret != size) { |
635 | dev_err(&urb->dev->dev, "recv iso_frame_descriptor, %d\n", | |
636 | ret); | |
637 | kfree(buff); | |
638 | ||
c7af4c22 | 639 | if (ud->side == USBIP_STUB || ud->side == USBIP_VUDC) |
05a1f28e TH |
640 | usbip_event_add(ud, SDEV_EVENT_ERROR_TCP); |
641 | else | |
642 | usbip_event_add(ud, VDEV_EVENT_ERROR_TCP); | |
643 | ||
644 | return -EPIPE; | |
645 | } | |
646 | ||
36ac9b05 | 647 | iso = (struct usbip_iso_packet_descriptor *) buff; |
05a1f28e | 648 | for (i = 0; i < np; i++) { |
36ac9b05 BW |
649 | usbip_iso_packet_correct_endian(&iso[i], 0); |
650 | usbip_pack_iso(&iso[i], &urb->iso_frame_desc[i], 0); | |
28276a28 | 651 | total_length += urb->iso_frame_desc[i].actual_length; |
05a1f28e TH |
652 | } |
653 | ||
05a1f28e TH |
654 | kfree(buff); |
655 | ||
28276a28 AM |
656 | if (total_length != urb->actual_length) { |
657 | dev_err(&urb->dev->dev, | |
6bb3ee69 | 658 | "total length of iso packets %d not equal to actual length of buffer %d\n", |
f9eacc98 | 659 | total_length, urb->actual_length); |
28276a28 | 660 | |
c7af4c22 | 661 | if (ud->side == USBIP_STUB || ud->side == USBIP_VUDC) |
28276a28 AM |
662 | usbip_event_add(ud, SDEV_EVENT_ERROR_TCP); |
663 | else | |
664 | usbip_event_add(ud, VDEV_EVENT_ERROR_TCP); | |
665 | ||
666 | return -EPIPE; | |
667 | } | |
668 | ||
05a1f28e TH |
669 | return ret; |
670 | } | |
671 | EXPORT_SYMBOL_GPL(usbip_recv_iso); | |
672 | ||
28276a28 AM |
673 | /* |
674 | * This functions restores the padding which was removed for optimizing | |
675 | * the bandwidth during transfer over tcp/ip | |
676 | * | |
677 | * buffer and iso packets need to be stored and be in propeper endian in urb | |
678 | * before calling this function | |
679 | */ | |
ac2b41ac | 680 | void usbip_pad_iso(struct usbip_device *ud, struct urb *urb) |
28276a28 AM |
681 | { |
682 | int np = urb->number_of_packets; | |
683 | int i; | |
28276a28 AM |
684 | int actualoffset = urb->actual_length; |
685 | ||
686 | if (!usb_pipeisoc(urb->pipe)) | |
ac2b41ac | 687 | return; |
28276a28 AM |
688 | |
689 | /* if no packets or length of data is 0, then nothing to unpack */ | |
690 | if (np == 0 || urb->actual_length == 0) | |
ac2b41ac | 691 | return; |
28276a28 AM |
692 | |
693 | /* | |
694 | * if actual_length is transfer_buffer_length then no padding is | |
695 | * present. | |
c7f00899 | 696 | */ |
28276a28 | 697 | if (urb->actual_length == urb->transfer_buffer_length) |
ac2b41ac | 698 | return; |
28276a28 AM |
699 | |
700 | /* | |
9a284e5c | 701 | * loop over all packets from last to first (to prevent overwriting |
28276a28 AM |
702 | * memory when padding) and move them into the proper place |
703 | */ | |
704 | for (i = np-1; i > 0; i--) { | |
705 | actualoffset -= urb->iso_frame_desc[i].actual_length; | |
706 | memmove(urb->transfer_buffer + urb->iso_frame_desc[i].offset, | |
f9eacc98 | 707 | urb->transfer_buffer + actualoffset, |
708 | urb->iso_frame_desc[i].actual_length); | |
28276a28 | 709 | } |
28276a28 AM |
710 | } |
711 | EXPORT_SYMBOL_GPL(usbip_pad_iso); | |
05a1f28e TH |
712 | |
713 | /* some members of urb must be substituted before. */ | |
714 | int usbip_recv_xbuff(struct usbip_device *ud, struct urb *urb) | |
715 | { | |
716 | int ret; | |
717 | int size; | |
718 | ||
c7af4c22 | 719 | if (ud->side == USBIP_STUB || ud->side == USBIP_VUDC) { |
05a1f28e TH |
720 | /* the direction of urb must be OUT. */ |
721 | if (usb_pipein(urb->pipe)) | |
722 | return 0; | |
723 | ||
724 | size = urb->transfer_buffer_length; | |
725 | } else { | |
05a1f28e TH |
726 | /* the direction of urb must be IN. */ |
727 | if (usb_pipeout(urb->pipe)) | |
728 | return 0; | |
729 | ||
730 | size = urb->actual_length; | |
731 | } | |
732 | ||
733 | /* no need to recv xbuff */ | |
734 | if (!(size > 0)) | |
735 | return 0; | |
736 | ||
b348d7dd IK |
737 | if (size > urb->transfer_buffer_length) { |
738 | /* should not happen, probably malicious packet */ | |
739 | if (ud->side == USBIP_STUB) { | |
740 | usbip_event_add(ud, SDEV_EVENT_ERROR_TCP); | |
741 | return 0; | |
742 | } else { | |
743 | usbip_event_add(ud, VDEV_EVENT_ERROR_TCP); | |
744 | return -EPIPE; | |
745 | } | |
746 | } | |
747 | ||
5a08c526 | 748 | ret = usbip_recv(ud->tcp_socket, urb->transfer_buffer, size); |
05a1f28e TH |
749 | if (ret != size) { |
750 | dev_err(&urb->dev->dev, "recv xbuf, %d\n", ret); | |
c7af4c22 | 751 | if (ud->side == USBIP_STUB || ud->side == USBIP_VUDC) { |
05a1f28e TH |
752 | usbip_event_add(ud, SDEV_EVENT_ERROR_TCP); |
753 | } else { | |
754 | usbip_event_add(ud, VDEV_EVENT_ERROR_TCP); | |
755 | return -EPIPE; | |
756 | } | |
757 | } | |
758 | ||
759 | return ret; | |
760 | } | |
761 | EXPORT_SYMBOL_GPL(usbip_recv_xbuff); | |
762 | ||
3028d0ae | 763 | static int __init usbip_core_init(void) |
05a1f28e | 764 | { |
bb7871ad NI |
765 | int ret; |
766 | ||
bb7871ad NI |
767 | ret = usbip_init_eh(); |
768 | if (ret) | |
769 | return ret; | |
770 | ||
05a1f28e TH |
771 | return 0; |
772 | } | |
773 | ||
3028d0ae | 774 | static void __exit usbip_core_exit(void) |
05a1f28e | 775 | { |
bb7871ad | 776 | usbip_finish_eh(); |
05a1f28e TH |
777 | return; |
778 | } | |
779 | ||
3028d0ae | 780 | module_init(usbip_core_init); |
781 | module_exit(usbip_core_exit); | |
05a1f28e TH |
782 | |
783 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
784 | MODULE_DESCRIPTION(DRIVER_DESC); | |
785 | MODULE_LICENSE("GPL"); |