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1da177e4 LT |
1 | /* |
2 | * Copyright (c) 2004 Topspin Corporation. All rights reserved. | |
2a1d9b7f | 3 | * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. |
1da177e4 LT |
4 | * |
5 | * This software is available to you under a choice of one of two | |
6 | * licenses. You may choose to be licensed under the terms of the GNU | |
7 | * General Public License (GPL) Version 2, available from the file | |
8 | * COPYING in the main directory of this source tree, or the | |
9 | * OpenIB.org BSD license below: | |
10 | * | |
11 | * Redistribution and use in source and binary forms, with or | |
12 | * without modification, are permitted provided that the following | |
13 | * conditions are met: | |
14 | * | |
15 | * - Redistributions of source code must retain the above | |
16 | * copyright notice, this list of conditions and the following | |
17 | * disclaimer. | |
18 | * | |
19 | * - Redistributions in binary form must reproduce the above | |
20 | * copyright notice, this list of conditions and the following | |
21 | * disclaimer in the documentation and/or other materials | |
22 | * provided with the distribution. | |
23 | * | |
24 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
25 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
26 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
27 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
28 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
29 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
30 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
31 | * SOFTWARE. | |
1da177e4 LT |
32 | */ |
33 | ||
34 | #include <linux/errno.h> | |
8c65b4a6 | 35 | #include <linux/string.h> |
b108d976 | 36 | #include <linux/export.h> |
af7bd463 | 37 | #include <linux/if_ether.h> |
25f40220 | 38 | #include <linux/ip.h> |
1da177e4 | 39 | |
a4d61e84 | 40 | #include <rdma/ib_pack.h> |
1da177e4 LT |
41 | |
42 | #define STRUCT_FIELD(header, field) \ | |
43 | .struct_offset_bytes = offsetof(struct ib_unpacked_ ## header, field), \ | |
44 | .struct_size_bytes = sizeof ((struct ib_unpacked_ ## header *) 0)->field, \ | |
45 | .field_name = #header ":" #field | |
46 | ||
47 | static const struct ib_field lrh_table[] = { | |
48 | { STRUCT_FIELD(lrh, virtual_lane), | |
49 | .offset_words = 0, | |
50 | .offset_bits = 0, | |
51 | .size_bits = 4 }, | |
52 | { STRUCT_FIELD(lrh, link_version), | |
53 | .offset_words = 0, | |
54 | .offset_bits = 4, | |
55 | .size_bits = 4 }, | |
56 | { STRUCT_FIELD(lrh, service_level), | |
57 | .offset_words = 0, | |
58 | .offset_bits = 8, | |
59 | .size_bits = 4 }, | |
60 | { RESERVED, | |
61 | .offset_words = 0, | |
62 | .offset_bits = 12, | |
63 | .size_bits = 2 }, | |
64 | { STRUCT_FIELD(lrh, link_next_header), | |
65 | .offset_words = 0, | |
66 | .offset_bits = 14, | |
67 | .size_bits = 2 }, | |
68 | { STRUCT_FIELD(lrh, destination_lid), | |
69 | .offset_words = 0, | |
70 | .offset_bits = 16, | |
71 | .size_bits = 16 }, | |
72 | { RESERVED, | |
73 | .offset_words = 1, | |
74 | .offset_bits = 0, | |
75 | .size_bits = 5 }, | |
76 | { STRUCT_FIELD(lrh, packet_length), | |
77 | .offset_words = 1, | |
78 | .offset_bits = 5, | |
79 | .size_bits = 11 }, | |
80 | { STRUCT_FIELD(lrh, source_lid), | |
81 | .offset_words = 1, | |
82 | .offset_bits = 16, | |
83 | .size_bits = 16 } | |
84 | }; | |
85 | ||
ff7f5aab EC |
86 | static const struct ib_field eth_table[] = { |
87 | { STRUCT_FIELD(eth, dmac_h), | |
88 | .offset_words = 0, | |
89 | .offset_bits = 0, | |
90 | .size_bits = 32 }, | |
91 | { STRUCT_FIELD(eth, dmac_l), | |
92 | .offset_words = 1, | |
93 | .offset_bits = 0, | |
94 | .size_bits = 16 }, | |
95 | { STRUCT_FIELD(eth, smac_h), | |
96 | .offset_words = 1, | |
97 | .offset_bits = 16, | |
98 | .size_bits = 16 }, | |
99 | { STRUCT_FIELD(eth, smac_l), | |
100 | .offset_words = 2, | |
101 | .offset_bits = 0, | |
102 | .size_bits = 32 }, | |
103 | { STRUCT_FIELD(eth, type), | |
104 | .offset_words = 3, | |
105 | .offset_bits = 0, | |
106 | .size_bits = 16 } | |
107 | }; | |
108 | ||
af7bd463 EC |
109 | static const struct ib_field vlan_table[] = { |
110 | { STRUCT_FIELD(vlan, tag), | |
111 | .offset_words = 0, | |
112 | .offset_bits = 0, | |
113 | .size_bits = 16 }, | |
114 | { STRUCT_FIELD(vlan, type), | |
115 | .offset_words = 0, | |
116 | .offset_bits = 16, | |
117 | .size_bits = 16 } | |
118 | }; | |
119 | ||
25f40220 MS |
120 | static const struct ib_field ip4_table[] = { |
121 | { STRUCT_FIELD(ip4, ver), | |
122 | .offset_words = 0, | |
123 | .offset_bits = 0, | |
124 | .size_bits = 4 }, | |
125 | { STRUCT_FIELD(ip4, hdr_len), | |
126 | .offset_words = 0, | |
127 | .offset_bits = 4, | |
128 | .size_bits = 4 }, | |
129 | { STRUCT_FIELD(ip4, tos), | |
130 | .offset_words = 0, | |
131 | .offset_bits = 8, | |
132 | .size_bits = 8 }, | |
133 | { STRUCT_FIELD(ip4, tot_len), | |
134 | .offset_words = 0, | |
135 | .offset_bits = 16, | |
136 | .size_bits = 16 }, | |
137 | { STRUCT_FIELD(ip4, id), | |
138 | .offset_words = 1, | |
139 | .offset_bits = 0, | |
140 | .size_bits = 16 }, | |
141 | { STRUCT_FIELD(ip4, frag_off), | |
142 | .offset_words = 1, | |
143 | .offset_bits = 16, | |
144 | .size_bits = 16 }, | |
145 | { STRUCT_FIELD(ip4, ttl), | |
146 | .offset_words = 2, | |
147 | .offset_bits = 0, | |
148 | .size_bits = 8 }, | |
149 | { STRUCT_FIELD(ip4, protocol), | |
150 | .offset_words = 2, | |
151 | .offset_bits = 8, | |
152 | .size_bits = 8 }, | |
153 | { STRUCT_FIELD(ip4, check), | |
154 | .offset_words = 2, | |
155 | .offset_bits = 16, | |
156 | .size_bits = 16 }, | |
157 | { STRUCT_FIELD(ip4, saddr), | |
158 | .offset_words = 3, | |
159 | .offset_bits = 0, | |
160 | .size_bits = 32 }, | |
161 | { STRUCT_FIELD(ip4, daddr), | |
162 | .offset_words = 4, | |
163 | .offset_bits = 0, | |
164 | .size_bits = 32 } | |
165 | }; | |
166 | ||
167 | static const struct ib_field udp_table[] = { | |
168 | { STRUCT_FIELD(udp, sport), | |
169 | .offset_words = 0, | |
170 | .offset_bits = 0, | |
171 | .size_bits = 16 }, | |
172 | { STRUCT_FIELD(udp, dport), | |
173 | .offset_words = 0, | |
174 | .offset_bits = 16, | |
175 | .size_bits = 16 }, | |
176 | { STRUCT_FIELD(udp, length), | |
177 | .offset_words = 1, | |
178 | .offset_bits = 0, | |
179 | .size_bits = 16 }, | |
180 | { STRUCT_FIELD(udp, csum), | |
181 | .offset_words = 1, | |
182 | .offset_bits = 16, | |
183 | .size_bits = 16 } | |
184 | }; | |
185 | ||
1da177e4 LT |
186 | static const struct ib_field grh_table[] = { |
187 | { STRUCT_FIELD(grh, ip_version), | |
188 | .offset_words = 0, | |
189 | .offset_bits = 0, | |
190 | .size_bits = 4 }, | |
191 | { STRUCT_FIELD(grh, traffic_class), | |
192 | .offset_words = 0, | |
193 | .offset_bits = 4, | |
194 | .size_bits = 8 }, | |
195 | { STRUCT_FIELD(grh, flow_label), | |
196 | .offset_words = 0, | |
197 | .offset_bits = 12, | |
198 | .size_bits = 20 }, | |
199 | { STRUCT_FIELD(grh, payload_length), | |
200 | .offset_words = 1, | |
201 | .offset_bits = 0, | |
202 | .size_bits = 16 }, | |
203 | { STRUCT_FIELD(grh, next_header), | |
204 | .offset_words = 1, | |
205 | .offset_bits = 16, | |
206 | .size_bits = 8 }, | |
207 | { STRUCT_FIELD(grh, hop_limit), | |
208 | .offset_words = 1, | |
209 | .offset_bits = 24, | |
210 | .size_bits = 8 }, | |
211 | { STRUCT_FIELD(grh, source_gid), | |
212 | .offset_words = 2, | |
213 | .offset_bits = 0, | |
214 | .size_bits = 128 }, | |
215 | { STRUCT_FIELD(grh, destination_gid), | |
216 | .offset_words = 6, | |
217 | .offset_bits = 0, | |
218 | .size_bits = 128 } | |
219 | }; | |
220 | ||
221 | static const struct ib_field bth_table[] = { | |
222 | { STRUCT_FIELD(bth, opcode), | |
223 | .offset_words = 0, | |
224 | .offset_bits = 0, | |
225 | .size_bits = 8 }, | |
226 | { STRUCT_FIELD(bth, solicited_event), | |
227 | .offset_words = 0, | |
228 | .offset_bits = 8, | |
229 | .size_bits = 1 }, | |
230 | { STRUCT_FIELD(bth, mig_req), | |
231 | .offset_words = 0, | |
232 | .offset_bits = 9, | |
233 | .size_bits = 1 }, | |
234 | { STRUCT_FIELD(bth, pad_count), | |
235 | .offset_words = 0, | |
236 | .offset_bits = 10, | |
237 | .size_bits = 2 }, | |
238 | { STRUCT_FIELD(bth, transport_header_version), | |
239 | .offset_words = 0, | |
240 | .offset_bits = 12, | |
241 | .size_bits = 4 }, | |
242 | { STRUCT_FIELD(bth, pkey), | |
243 | .offset_words = 0, | |
244 | .offset_bits = 16, | |
245 | .size_bits = 16 }, | |
246 | { RESERVED, | |
247 | .offset_words = 1, | |
248 | .offset_bits = 0, | |
249 | .size_bits = 8 }, | |
250 | { STRUCT_FIELD(bth, destination_qpn), | |
251 | .offset_words = 1, | |
252 | .offset_bits = 8, | |
253 | .size_bits = 24 }, | |
254 | { STRUCT_FIELD(bth, ack_req), | |
255 | .offset_words = 2, | |
256 | .offset_bits = 0, | |
257 | .size_bits = 1 }, | |
258 | { RESERVED, | |
259 | .offset_words = 2, | |
260 | .offset_bits = 1, | |
261 | .size_bits = 7 }, | |
262 | { STRUCT_FIELD(bth, psn), | |
263 | .offset_words = 2, | |
264 | .offset_bits = 8, | |
265 | .size_bits = 24 } | |
266 | }; | |
267 | ||
268 | static const struct ib_field deth_table[] = { | |
269 | { STRUCT_FIELD(deth, qkey), | |
270 | .offset_words = 0, | |
271 | .offset_bits = 0, | |
272 | .size_bits = 32 }, | |
273 | { RESERVED, | |
274 | .offset_words = 1, | |
275 | .offset_bits = 0, | |
276 | .size_bits = 8 }, | |
277 | { STRUCT_FIELD(deth, source_qpn), | |
278 | .offset_words = 1, | |
279 | .offset_bits = 8, | |
280 | .size_bits = 24 } | |
281 | }; | |
282 | ||
3ef967a4 | 283 | __sum16 ib_ud_ip4_csum(struct ib_ud_header *header) |
25f40220 MS |
284 | { |
285 | struct iphdr iph; | |
286 | ||
287 | iph.ihl = 5; | |
288 | iph.version = 4; | |
289 | iph.tos = header->ip4.tos; | |
290 | iph.tot_len = header->ip4.tot_len; | |
291 | iph.id = header->ip4.id; | |
292 | iph.frag_off = header->ip4.frag_off; | |
293 | iph.ttl = header->ip4.ttl; | |
294 | iph.protocol = header->ip4.protocol; | |
295 | iph.check = 0; | |
296 | iph.saddr = header->ip4.saddr; | |
297 | iph.daddr = header->ip4.daddr; | |
298 | ||
299 | return ip_fast_csum((u8 *)&iph, iph.ihl); | |
300 | } | |
301 | EXPORT_SYMBOL(ib_ud_ip4_csum); | |
302 | ||
1da177e4 LT |
303 | /** |
304 | * ib_ud_header_init - Initialize UD header structure | |
305 | * @payload_bytes:Length of packet payload | |
ff7f5aab EC |
306 | * @lrh_present: specify if LRH is present |
307 | * @eth_present: specify if Eth header is present | |
af7bd463 | 308 | * @vlan_present: packet is tagged vlan |
25f40220 MS |
309 | * @grh_present: GRH flag (if non-zero, GRH will be included) |
310 | * @ip_version: if non-zero, IP header, V4 or V6, will be included | |
311 | * @udp_present :if non-zero, UDP header will be included | |
ff7f5aab | 312 | * @immediate_present: specify if immediate data is present |
1da177e4 | 313 | * @header:Structure to initialize |
1da177e4 | 314 | */ |
25f40220 MS |
315 | int ib_ud_header_init(int payload_bytes, |
316 | int lrh_present, | |
317 | int eth_present, | |
318 | int vlan_present, | |
319 | int grh_present, | |
320 | int ip_version, | |
321 | int udp_present, | |
322 | int immediate_present, | |
323 | struct ib_ud_header *header) | |
1da177e4 | 324 | { |
1c5e0809 MS |
325 | size_t udp_bytes = udp_present ? IB_UDP_BYTES : 0; |
326 | ||
25f40220 | 327 | grh_present = grh_present && !ip_version; |
1da177e4 LT |
328 | memset(header, 0, sizeof *header); |
329 | ||
25f40220 MS |
330 | /* |
331 | * UDP header without IP header doesn't make sense | |
332 | */ | |
333 | if (udp_present && ip_version != 4 && ip_version != 6) | |
334 | return -EINVAL; | |
335 | ||
ff7f5aab EC |
336 | if (lrh_present) { |
337 | u16 packet_length; | |
338 | ||
339 | header->lrh.link_version = 0; | |
340 | header->lrh.link_next_header = | |
341 | grh_present ? IB_LNH_IBA_GLOBAL : IB_LNH_IBA_LOCAL; | |
342 | packet_length = (IB_LRH_BYTES + | |
343 | IB_BTH_BYTES + | |
344 | IB_DETH_BYTES + | |
345 | (grh_present ? IB_GRH_BYTES : 0) + | |
346 | payload_bytes + | |
347 | 4 + /* ICRC */ | |
348 | 3) / 4; /* round up */ | |
349 | header->lrh.packet_length = cpu_to_be16(packet_length); | |
350 | } | |
1da177e4 | 351 | |
af7bd463 EC |
352 | if (vlan_present) |
353 | header->eth.type = cpu_to_be16(ETH_P_8021Q); | |
354 | ||
25f40220 | 355 | if (ip_version == 6 || grh_present) { |
1da177e4 LT |
356 | header->grh.ip_version = 6; |
357 | header->grh.payload_length = | |
1c5e0809 MS |
358 | cpu_to_be16((udp_bytes + |
359 | IB_BTH_BYTES + | |
1da177e4 LT |
360 | IB_DETH_BYTES + |
361 | payload_bytes + | |
362 | 4 + /* ICRC */ | |
363 | 3) & ~3); /* round up */ | |
25f40220 | 364 | header->grh.next_header = udp_present ? IPPROTO_UDP : 0x1b; |
1da177e4 LT |
365 | } |
366 | ||
25f40220 | 367 | if (ip_version == 4) { |
25f40220 MS |
368 | header->ip4.ver = 4; /* version 4 */ |
369 | header->ip4.hdr_len = 5; /* 5 words */ | |
370 | header->ip4.tot_len = | |
371 | cpu_to_be16(IB_IP4_BYTES + | |
372 | udp_bytes + | |
373 | IB_BTH_BYTES + | |
374 | IB_DETH_BYTES + | |
375 | payload_bytes + | |
376 | 4); /* ICRC */ | |
377 | header->ip4.protocol = IPPROTO_UDP; | |
378 | } | |
379 | if (udp_present && ip_version) | |
380 | header->udp.length = | |
381 | cpu_to_be16(IB_UDP_BYTES + | |
382 | IB_BTH_BYTES + | |
383 | IB_DETH_BYTES + | |
384 | payload_bytes + | |
385 | 4); /* ICRC */ | |
386 | ||
920d706c | 387 | if (immediate_present) |
1da177e4 LT |
388 | header->bth.opcode = IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE; |
389 | else | |
390 | header->bth.opcode = IB_OPCODE_UD_SEND_ONLY; | |
391 | header->bth.pad_count = (4 - payload_bytes) & 3; | |
392 | header->bth.transport_header_version = 0; | |
ff7f5aab EC |
393 | |
394 | header->lrh_present = lrh_present; | |
395 | header->eth_present = eth_present; | |
af7bd463 | 396 | header->vlan_present = vlan_present; |
25f40220 MS |
397 | header->grh_present = grh_present || (ip_version == 6); |
398 | header->ipv4_present = ip_version == 4; | |
399 | header->udp_present = udp_present; | |
ff7f5aab | 400 | header->immediate_present = immediate_present; |
25f40220 | 401 | return 0; |
1da177e4 LT |
402 | } |
403 | EXPORT_SYMBOL(ib_ud_header_init); | |
404 | ||
405 | /** | |
406 | * ib_ud_header_pack - Pack UD header struct into wire format | |
407 | * @header:UD header struct | |
408 | * @buf:Buffer to pack into | |
409 | * | |
410 | * ib_ud_header_pack() packs the UD header structure @header into wire | |
411 | * format in the buffer @buf. | |
412 | */ | |
413 | int ib_ud_header_pack(struct ib_ud_header *header, | |
414 | void *buf) | |
415 | { | |
416 | int len = 0; | |
417 | ||
ff7f5aab EC |
418 | if (header->lrh_present) { |
419 | ib_pack(lrh_table, ARRAY_SIZE(lrh_table), | |
420 | &header->lrh, buf + len); | |
421 | len += IB_LRH_BYTES; | |
422 | } | |
423 | if (header->eth_present) { | |
424 | ib_pack(eth_table, ARRAY_SIZE(eth_table), | |
425 | &header->eth, buf + len); | |
426 | len += IB_ETH_BYTES; | |
427 | } | |
af7bd463 EC |
428 | if (header->vlan_present) { |
429 | ib_pack(vlan_table, ARRAY_SIZE(vlan_table), | |
430 | &header->vlan, buf + len); | |
431 | len += IB_VLAN_BYTES; | |
432 | } | |
1da177e4 LT |
433 | if (header->grh_present) { |
434 | ib_pack(grh_table, ARRAY_SIZE(grh_table), | |
435 | &header->grh, buf + len); | |
436 | len += IB_GRH_BYTES; | |
437 | } | |
25f40220 MS |
438 | if (header->ipv4_present) { |
439 | ib_pack(ip4_table, ARRAY_SIZE(ip4_table), | |
440 | &header->ip4, buf + len); | |
441 | len += IB_IP4_BYTES; | |
442 | } | |
443 | if (header->udp_present) { | |
444 | ib_pack(udp_table, ARRAY_SIZE(udp_table), | |
445 | &header->udp, buf + len); | |
446 | len += IB_UDP_BYTES; | |
447 | } | |
1da177e4 LT |
448 | |
449 | ib_pack(bth_table, ARRAY_SIZE(bth_table), | |
450 | &header->bth, buf + len); | |
451 | len += IB_BTH_BYTES; | |
452 | ||
453 | ib_pack(deth_table, ARRAY_SIZE(deth_table), | |
454 | &header->deth, buf + len); | |
455 | len += IB_DETH_BYTES; | |
456 | ||
457 | if (header->immediate_present) { | |
458 | memcpy(buf + len, &header->immediate_data, sizeof header->immediate_data); | |
459 | len += sizeof header->immediate_data; | |
460 | } | |
461 | ||
462 | return len; | |
463 | } | |
464 | EXPORT_SYMBOL(ib_ud_header_pack); | |
465 | ||
466 | /** | |
467 | * ib_ud_header_unpack - Unpack UD header struct from wire format | |
468 | * @header:UD header struct | |
469 | * @buf:Buffer to pack into | |
470 | * | |
471 | * ib_ud_header_pack() unpacks the UD header structure @header from wire | |
472 | * format in the buffer @buf. | |
473 | */ | |
474 | int ib_ud_header_unpack(void *buf, | |
475 | struct ib_ud_header *header) | |
476 | { | |
477 | ib_unpack(lrh_table, ARRAY_SIZE(lrh_table), | |
478 | buf, &header->lrh); | |
479 | buf += IB_LRH_BYTES; | |
480 | ||
481 | if (header->lrh.link_version != 0) { | |
aba25a3e PP |
482 | pr_warn("Invalid LRH.link_version %d\n", |
483 | header->lrh.link_version); | |
1da177e4 LT |
484 | return -EINVAL; |
485 | } | |
486 | ||
487 | switch (header->lrh.link_next_header) { | |
488 | case IB_LNH_IBA_LOCAL: | |
489 | header->grh_present = 0; | |
490 | break; | |
491 | ||
492 | case IB_LNH_IBA_GLOBAL: | |
493 | header->grh_present = 1; | |
494 | ib_unpack(grh_table, ARRAY_SIZE(grh_table), | |
495 | buf, &header->grh); | |
496 | buf += IB_GRH_BYTES; | |
497 | ||
498 | if (header->grh.ip_version != 6) { | |
aba25a3e PP |
499 | pr_warn("Invalid GRH.ip_version %d\n", |
500 | header->grh.ip_version); | |
1da177e4 LT |
501 | return -EINVAL; |
502 | } | |
503 | if (header->grh.next_header != 0x1b) { | |
aba25a3e PP |
504 | pr_warn("Invalid GRH.next_header 0x%02x\n", |
505 | header->grh.next_header); | |
1da177e4 LT |
506 | return -EINVAL; |
507 | } | |
508 | break; | |
509 | ||
510 | default: | |
aba25a3e PP |
511 | pr_warn("Invalid LRH.link_next_header %d\n", |
512 | header->lrh.link_next_header); | |
1da177e4 LT |
513 | return -EINVAL; |
514 | } | |
515 | ||
516 | ib_unpack(bth_table, ARRAY_SIZE(bth_table), | |
517 | buf, &header->bth); | |
518 | buf += IB_BTH_BYTES; | |
519 | ||
520 | switch (header->bth.opcode) { | |
521 | case IB_OPCODE_UD_SEND_ONLY: | |
522 | header->immediate_present = 0; | |
523 | break; | |
524 | case IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE: | |
525 | header->immediate_present = 1; | |
526 | break; | |
527 | default: | |
aba25a3e | 528 | pr_warn("Invalid BTH.opcode 0x%02x\n", header->bth.opcode); |
1da177e4 LT |
529 | return -EINVAL; |
530 | } | |
531 | ||
532 | if (header->bth.transport_header_version != 0) { | |
aba25a3e PP |
533 | pr_warn("Invalid BTH.transport_header_version %d\n", |
534 | header->bth.transport_header_version); | |
1da177e4 LT |
535 | return -EINVAL; |
536 | } | |
537 | ||
538 | ib_unpack(deth_table, ARRAY_SIZE(deth_table), | |
539 | buf, &header->deth); | |
540 | buf += IB_DETH_BYTES; | |
541 | ||
542 | if (header->immediate_present) | |
543 | memcpy(&header->immediate_data, buf, sizeof header->immediate_data); | |
544 | ||
545 | return 0; | |
546 | } | |
547 | EXPORT_SYMBOL(ib_ud_header_unpack); |