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982697a4 | 1 | /* |
cb22974d | 2 | * Copyright (c) 2012, 2013 Nicira, Inc. |
982697a4 BP |
3 | * |
4 | * Licensed under the Apache License, Version 2.0 (the "License"); | |
5 | * you may not use this file except in compliance with the License. | |
6 | * You may obtain a copy of the License at: | |
7 | * | |
8 | * http://www.apache.org/licenses/LICENSE-2.0 | |
9 | * | |
10 | * Unless required by applicable law or agreed to in writing, software | |
11 | * distributed under the License is distributed on an "AS IS" BASIS, | |
12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
13 | * See the License for the specific language governing permissions and | |
14 | * limitations under the License. | |
15 | */ | |
16 | ||
17 | #include <config.h> | |
18 | #include "ofp-msgs.h" | |
982697a4 BP |
19 | #include "byte-order.h" |
20 | #include "dynamic-string.h" | |
21 | #include "hash.h" | |
22 | #include "hmap.h" | |
23 | #include "ofpbuf.h" | |
24 | #include "openflow/nicira-ext.h" | |
25 | #include "openflow/openflow.h" | |
06717cbd | 26 | #include "ovs-thread.h" |
982697a4 BP |
27 | #include "vlog.h" |
28 | ||
29 | VLOG_DEFINE_THIS_MODULE(ofp_msgs); | |
30 | ||
31 | #define OFPT_VENDOR 4 | |
32 | #define OFPT10_STATS_REQUEST 16 | |
33 | #define OFPT10_STATS_REPLY 17 | |
34 | #define OFPT11_STATS_REQUEST 18 | |
35 | #define OFPT11_STATS_REPLY 19 | |
36 | #define OFPST_VENDOR 0xffff | |
37 | ||
38 | /* A thin abstraction of OpenFlow headers: | |
39 | * | |
40 | * - 'version' and 'type' come straight from struct ofp_header, so these are | |
41 | * always present and meaningful. | |
42 | * | |
43 | * - 'stat' comes from the 'type' member in statistics messages only. It is | |
44 | * meaningful, therefore, only if 'version' and 'type' taken together | |
45 | * specify a statistics request or reply. Otherwise it is 0. | |
46 | * | |
47 | * - 'vendor' is meaningful only for vendor messages, that is, if 'version' | |
48 | * and 'type' specify a vendor message or if 'version' and 'type' specify | |
49 | * a statistics message and 'stat' specifies a vendor statistic type. | |
50 | * Otherwise it is 0. | |
51 | * | |
52 | * - 'subtype' is meaningful only for vendor messages and otherwise 0. It | |
53 | * specifies a vendor-defined subtype. There is no standard format for | |
54 | * these but 32 bits seems like it should be enough. */ | |
55 | struct ofphdrs { | |
56 | uint8_t version; /* From ofp_header. */ | |
57 | uint8_t type; /* From ofp_header. */ | |
58 | uint16_t stat; /* From ofp10_stats_msg or ofp11_stats_msg. */ | |
59 | uint32_t vendor; /* From ofp_vendor_header, | |
60 | * ofp10_vendor_stats_msg, or | |
61 | * ofp11_vendor_stats_msg. */ | |
62 | uint32_t subtype; /* From nicira_header, nicira10_stats_msg, or | |
63 | * nicira11_stats_msg. */ | |
64 | }; | |
65 | BUILD_ASSERT_DECL(sizeof(struct ofphdrs) == 12); | |
66 | ||
67 | /* A mapping from OpenFlow headers to OFPRAW_*. */ | |
68 | struct raw_instance { | |
69 | struct hmap_node hmap_node; /* In 'raw_instance_map'. */ | |
70 | struct ofphdrs hdrs; /* Key. */ | |
71 | enum ofpraw raw; /* Value. */ | |
72 | unsigned int hdrs_len; /* ofphdrs_len(hdrs). */ | |
73 | }; | |
74 | ||
75 | /* Information about a particular 'enum ofpraw'. */ | |
76 | struct raw_info { | |
77 | /* All possible instantiations of this OFPRAW_* into OpenFlow headers. */ | |
78 | struct raw_instance *instances; /* min_version - max_version + 1 elems. */ | |
79 | uint8_t min_version; | |
80 | uint8_t max_version; | |
81 | ||
82 | unsigned int min_body; | |
83 | unsigned int extra_multiple; | |
84 | enum ofptype type; | |
85 | const char *name; | |
86 | }; | |
87 | ||
88 | /* All understood OpenFlow message types, indexed by their 'struct ofphdrs'. */ | |
89 | static struct hmap raw_instance_map; | |
90 | #include "ofp-msgs.inc" | |
91 | ||
92 | static ovs_be32 alloc_xid(void); | |
93 | ||
94 | /* ofphdrs functions. */ | |
95 | static uint32_t ofphdrs_hash(const struct ofphdrs *); | |
96 | static bool ofphdrs_equal(const struct ofphdrs *a, const struct ofphdrs *b); | |
97 | static enum ofperr ofphdrs_decode(struct ofphdrs *, | |
98 | const struct ofp_header *oh, size_t length); | |
99 | static void ofphdrs_decode_assert(struct ofphdrs *, | |
100 | const struct ofp_header *oh, size_t length); | |
101 | size_t ofphdrs_len(const struct ofphdrs *); | |
102 | ||
103 | static const struct raw_info *raw_info_get(enum ofpraw); | |
104 | static struct raw_instance *raw_instance_get(const struct raw_info *, | |
105 | uint8_t version); | |
106 | ||
107 | static enum ofperr ofpraw_from_ofphdrs(enum ofpraw *, const struct ofphdrs *); | |
108 | \f | |
109 | /* Returns a transaction ID to use for an outgoing OpenFlow message. */ | |
110 | static ovs_be32 | |
111 | alloc_xid(void) | |
112 | { | |
97be1538 | 113 | static atomic_uint32_t next_xid = ATOMIC_VAR_INIT(1); |
d0c79f7f BP |
114 | uint32_t xid; |
115 | ||
97be1538 | 116 | atomic_add(&next_xid, 1, &xid); |
d0c79f7f | 117 | return htonl(xid); |
982697a4 BP |
118 | } |
119 | \f | |
120 | static uint32_t | |
121 | ofphdrs_hash(const struct ofphdrs *hdrs) | |
122 | { | |
123 | BUILD_ASSERT_DECL(sizeof *hdrs == 12); | |
124 | return hash_words((const uint32_t *) hdrs, 3, 0); | |
125 | } | |
126 | ||
127 | static bool | |
128 | ofphdrs_equal(const struct ofphdrs *a, const struct ofphdrs *b) | |
129 | { | |
130 | return !memcmp(a, b, sizeof *a); | |
131 | } | |
132 | ||
133 | static void | |
134 | log_bad_vendor(uint32_t vendor) | |
135 | { | |
136 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1); | |
137 | ||
138 | VLOG_WARN_RL(&rl, "OpenFlow message has unknown vendor %#"PRIx32, vendor); | |
139 | } | |
140 | ||
141 | static enum ofperr | |
142 | ofphdrs_decode(struct ofphdrs *hdrs, | |
143 | const struct ofp_header *oh, size_t length) | |
144 | { | |
145 | memset(hdrs, 0, sizeof *hdrs); | |
146 | if (length < sizeof *oh) { | |
147 | return OFPERR_OFPBRC_BAD_LEN; | |
148 | } | |
149 | ||
150 | /* Get base message version and type (OFPT_*). */ | |
151 | hdrs->version = oh->version; | |
152 | hdrs->type = oh->type; | |
153 | ||
154 | if (hdrs->type == OFPT_VENDOR) { | |
155 | /* Get vendor. */ | |
156 | const struct ofp_vendor_header *ovh; | |
157 | ||
158 | if (length < sizeof *ovh) { | |
159 | return OFPERR_OFPBRC_BAD_LEN; | |
160 | } | |
161 | ||
162 | ovh = (const struct ofp_vendor_header *) oh; | |
163 | hdrs->vendor = ntohl(ovh->vendor); | |
164 | if (hdrs->vendor == NX_VENDOR_ID) { | |
165 | /* Get Nicira message subtype (NXT_*). */ | |
166 | const struct nicira_header *nh; | |
167 | ||
168 | if (length < sizeof *nh) { | |
169 | return OFPERR_OFPBRC_BAD_LEN; | |
170 | } | |
171 | nh = (const struct nicira_header *) oh; | |
172 | hdrs->subtype = ntohl(nh->subtype); | |
173 | } else { | |
174 | log_bad_vendor(hdrs->vendor); | |
175 | return OFPERR_OFPBRC_BAD_VENDOR; | |
176 | } | |
177 | } else if (hdrs->version == OFP10_VERSION | |
178 | && (hdrs->type == OFPT10_STATS_REQUEST || | |
179 | hdrs->type == OFPT10_STATS_REPLY)) { | |
e2b9ac44 | 180 | const struct ofp10_stats_msg *osm; |
982697a4 BP |
181 | |
182 | /* Get statistic type (OFPST_*). */ | |
183 | if (length < sizeof *osm) { | |
184 | return OFPERR_OFPBRC_BAD_LEN; | |
185 | } | |
e2b9ac44 | 186 | osm = (const struct ofp10_stats_msg *) oh; |
982697a4 BP |
187 | hdrs->stat = ntohs(osm->type); |
188 | ||
189 | if (hdrs->stat == OFPST_VENDOR) { | |
190 | /* Get vendor. */ | |
191 | const struct ofp10_vendor_stats_msg *ovsm; | |
192 | ||
193 | if (length < sizeof *ovsm) { | |
194 | return OFPERR_OFPBRC_BAD_LEN; | |
195 | } | |
196 | ||
197 | ovsm = (const struct ofp10_vendor_stats_msg *) oh; | |
198 | hdrs->vendor = ntohl(ovsm->vendor); | |
199 | if (hdrs->vendor == NX_VENDOR_ID) { | |
200 | /* Get Nicira statistic type (NXST_*). */ | |
201 | const struct nicira10_stats_msg *nsm; | |
202 | ||
203 | if (length < sizeof *nsm) { | |
204 | return OFPERR_OFPBRC_BAD_LEN; | |
205 | } | |
206 | nsm = (const struct nicira10_stats_msg *) oh; | |
207 | hdrs->subtype = ntohl(nsm->subtype); | |
208 | } else { | |
209 | log_bad_vendor(hdrs->vendor); | |
210 | return OFPERR_OFPBRC_BAD_VENDOR; | |
211 | } | |
212 | } | |
213 | } else if (hdrs->version != OFP10_VERSION | |
214 | && (hdrs->type == OFPT11_STATS_REQUEST || | |
215 | hdrs->type == OFPT11_STATS_REPLY)) { | |
216 | const struct ofp11_stats_msg *osm; | |
217 | ||
218 | /* Get statistic type (OFPST_*). */ | |
219 | if (length < sizeof *osm) { | |
220 | return OFPERR_OFPBRC_BAD_LEN; | |
221 | } | |
222 | osm = (const struct ofp11_stats_msg *) oh; | |
223 | hdrs->stat = ntohs(osm->type); | |
224 | ||
225 | if (hdrs->stat == OFPST_VENDOR) { | |
226 | /* Get vendor. */ | |
227 | const struct ofp11_vendor_stats_msg *ovsm; | |
228 | ||
229 | if (length < sizeof *ovsm) { | |
230 | return OFPERR_OFPBRC_BAD_LEN; | |
231 | } | |
232 | ||
233 | ovsm = (const struct ofp11_vendor_stats_msg *) oh; | |
234 | hdrs->vendor = ntohl(ovsm->vendor); | |
235 | if (hdrs->vendor == NX_VENDOR_ID) { | |
236 | /* Get Nicira statistic type (NXST_*). */ | |
237 | const struct nicira11_stats_msg *nsm; | |
238 | ||
239 | if (length < sizeof *nsm) { | |
240 | return OFPERR_OFPBRC_BAD_LEN; | |
241 | } | |
242 | nsm = (const struct nicira11_stats_msg *) oh; | |
243 | hdrs->subtype = ntohl(nsm->subtype); | |
244 | } else { | |
245 | log_bad_vendor(hdrs->vendor); | |
246 | return OFPERR_OFPBRC_BAD_VENDOR; | |
247 | } | |
248 | } | |
249 | } | |
250 | ||
251 | return 0; | |
252 | } | |
253 | ||
254 | static void | |
255 | ofphdrs_decode_assert(struct ofphdrs *hdrs, | |
256 | const struct ofp_header *oh, size_t length) | |
257 | { | |
258 | enum ofperr error = ofphdrs_decode(hdrs, oh, length); | |
cb22974d | 259 | ovs_assert(!error); |
982697a4 BP |
260 | } |
261 | ||
262 | static bool | |
263 | ofphdrs_is_stat(const struct ofphdrs *hdrs) | |
264 | { | |
2e3fa633 SH |
265 | switch ((enum ofp_version) hdrs->version) { |
266 | case OFP10_VERSION: | |
267 | return (hdrs->type == OFPT10_STATS_REQUEST || | |
268 | hdrs->type == OFPT10_STATS_REPLY); | |
269 | case OFP11_VERSION: | |
270 | case OFP12_VERSION: | |
2e1ae200 | 271 | case OFP13_VERSION: |
2e3fa633 SH |
272 | return (hdrs->type == OFPT11_STATS_REQUEST || |
273 | hdrs->type == OFPT11_STATS_REPLY); | |
274 | } | |
275 | ||
276 | return false; | |
982697a4 BP |
277 | } |
278 | ||
279 | size_t | |
280 | ofphdrs_len(const struct ofphdrs *hdrs) | |
281 | { | |
282 | if (hdrs->type == OFPT_VENDOR) { | |
283 | return sizeof(struct nicira_header); | |
284 | } | |
285 | ||
2e3fa633 SH |
286 | switch ((enum ofp_version) hdrs->version) { |
287 | case OFP10_VERSION: | |
982697a4 BP |
288 | if (hdrs->type == OFPT10_STATS_REQUEST || |
289 | hdrs->type == OFPT10_STATS_REPLY) { | |
290 | return (hdrs->stat == OFPST_VENDOR | |
291 | ? sizeof(struct nicira10_stats_msg) | |
e2b9ac44 | 292 | : sizeof(struct ofp10_stats_msg)); |
982697a4 | 293 | } |
2e3fa633 SH |
294 | break; |
295 | ||
296 | case OFP11_VERSION: | |
297 | case OFP12_VERSION: | |
2e1ae200 | 298 | case OFP13_VERSION: |
982697a4 BP |
299 | if (hdrs->type == OFPT11_STATS_REQUEST || |
300 | hdrs->type == OFPT11_STATS_REPLY) { | |
301 | return (hdrs->stat == OFPST_VENDOR | |
302 | ? sizeof(struct nicira11_stats_msg) | |
303 | : sizeof(struct ofp11_stats_msg)); | |
304 | } | |
2e3fa633 | 305 | break; |
982697a4 BP |
306 | } |
307 | ||
308 | return sizeof(struct ofp_header); | |
309 | } | |
310 | \f | |
311 | /* Determines the OFPRAW_* type of the OpenFlow message at 'oh', which has | |
312 | * length 'oh->length'. (The caller must ensure that 'oh->length' bytes of | |
313 | * data are readable at 'oh'.) On success, returns 0 and stores the type into | |
314 | * '*raw'. On failure, returns an OFPERR_* error code and zeros '*raw'. | |
315 | * | |
316 | * This function checks that 'oh' is a valid length for its particular type of | |
317 | * message, and returns an error if not. */ | |
318 | enum ofperr | |
319 | ofpraw_decode(enum ofpraw *raw, const struct ofp_header *oh) | |
320 | { | |
321 | struct ofpbuf msg; | |
322 | ||
323 | ofpbuf_use_const(&msg, oh, ntohs(oh->length)); | |
324 | return ofpraw_pull(raw, &msg); | |
325 | } | |
326 | ||
964a5f60 BP |
327 | /* Does the same job as ofpraw_decode(), except that it assert-fails if |
328 | * ofpraw_decode() would have reported an error. Thus, it's able to use the | |
329 | * return value for the OFPRAW_* message type instead of an error code. | |
330 | * | |
331 | * (It only makes sense to use this function if you previously called | |
332 | * ofpraw_decode() on the message and thus know that it's OK.) */ | |
333 | enum ofpraw | |
334 | ofpraw_decode_assert(const struct ofp_header *oh) | |
335 | { | |
336 | enum ofperr error; | |
337 | enum ofpraw raw; | |
338 | ||
339 | error = ofpraw_decode(&raw, oh); | |
340 | ovs_assert(!error); | |
341 | return raw; | |
342 | } | |
343 | ||
982697a4 BP |
344 | /* Determines the OFPRAW_* type of the OpenFlow message in 'msg', which starts |
345 | * at 'msg->data' and has length 'msg->size' bytes. On success, returns 0 and | |
346 | * stores the type into '*rawp'. On failure, returns an OFPERR_* error code | |
347 | * and zeros '*rawp'. | |
348 | * | |
349 | * This function checks that the message has a valid length for its particular | |
350 | * type of message, and returns an error if not. | |
351 | * | |
352 | * In addition to setting '*rawp', this function pulls off the OpenFlow header | |
353 | * (including the stats headers, vendor header, and any subtype header) with | |
354 | * ofpbuf_pull(). It also sets 'msg->l2' to the start of the OpenFlow header | |
355 | * and 'msg->l3' just beyond the headers (that is, to the final value of | |
356 | * msg->data). */ | |
357 | enum ofperr | |
358 | ofpraw_pull(enum ofpraw *rawp, struct ofpbuf *msg) | |
359 | { | |
360 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
361 | ||
362 | const struct raw_instance *instance; | |
363 | const struct raw_info *info; | |
364 | struct ofphdrs hdrs; | |
365 | ||
366 | unsigned int min_len; | |
367 | unsigned int len; | |
368 | ||
369 | enum ofperr error; | |
370 | enum ofpraw raw; | |
371 | ||
372 | /* Set default outputs. */ | |
373 | msg->l2 = msg->l3 = msg->data; | |
374 | *rawp = 0; | |
375 | ||
376 | len = msg->size; | |
377 | error = ofphdrs_decode(&hdrs, msg->data, len); | |
378 | if (error) { | |
379 | return error; | |
380 | } | |
381 | ||
382 | error = ofpraw_from_ofphdrs(&raw, &hdrs); | |
383 | if (error) { | |
384 | return error; | |
385 | } | |
386 | ||
387 | info = raw_info_get(raw); | |
388 | instance = raw_instance_get(info, hdrs.version); | |
389 | msg->l2 = ofpbuf_pull(msg, instance->hdrs_len); | |
390 | msg->l3 = msg->data; | |
391 | ||
392 | min_len = instance->hdrs_len + info->min_body; | |
393 | switch (info->extra_multiple) { | |
394 | case 0: | |
395 | if (len != min_len) { | |
396 | VLOG_WARN_RL(&rl, "received %s with incorrect length %u (expected " | |
397 | "length %u)", info->name, len, min_len); | |
398 | return OFPERR_OFPBRC_BAD_LEN; | |
399 | } | |
400 | break; | |
401 | ||
402 | case 1: | |
403 | if (len < min_len) { | |
404 | VLOG_WARN_RL(&rl, "received %s with incorrect length %u (expected " | |
405 | "length at least %u bytes)", | |
406 | info->name, len, min_len); | |
407 | return OFPERR_OFPBRC_BAD_LEN; | |
408 | } | |
409 | break; | |
410 | ||
411 | default: | |
412 | if (len < min_len || (len - min_len) % info->extra_multiple) { | |
413 | VLOG_WARN_RL(&rl, "received %s with incorrect length %u (must be " | |
414 | "exactly %u bytes or longer by an integer multiple " | |
415 | "of %u bytes)", | |
416 | info->name, len, min_len, info->extra_multiple); | |
417 | return OFPERR_OFPBRC_BAD_LEN; | |
418 | } | |
419 | break; | |
420 | } | |
421 | ||
422 | *rawp = raw; | |
423 | return 0; | |
424 | } | |
425 | ||
426 | /* Does the same job as ofpraw_pull(), except that it assert-fails if | |
e032c086 | 427 | * ofpraw_pull() would have reported an error. Thus, it's able to use the |
982697a4 BP |
428 | * return value for the OFPRAW_* message type instead of an error code. |
429 | * | |
430 | * (It only makes sense to use this function if you previously called | |
e032c086 | 431 | * ofpraw_decode() on the message and thus know that it's OK.) */ |
982697a4 BP |
432 | enum ofpraw |
433 | ofpraw_pull_assert(struct ofpbuf *msg) | |
434 | { | |
435 | enum ofperr error; | |
436 | enum ofpraw raw; | |
437 | ||
438 | error = ofpraw_pull(&raw, msg); | |
cb22974d | 439 | ovs_assert(!error); |
982697a4 BP |
440 | return raw; |
441 | } | |
442 | ||
443 | /* Determines the OFPRAW_* type of the OpenFlow message that starts at 'oh' and | |
444 | * has length 'length' bytes. On success, returns 0 and stores the type into | |
445 | * '*rawp'. On failure, returns an OFPERR_* error code and zeros '*rawp'. | |
446 | * | |
447 | * Unlike other functions for decoding message types, this one is not picky | |
448 | * about message length. For example, it will successfully decode a message | |
449 | * whose body is shorter than the minimum length for a message of its type. | |
450 | * Thus, this is the correct function to use for decoding the type of a message | |
451 | * that might have been truncated, such as the payload of an OpenFlow error | |
452 | * message (which is allowed to be truncated to 64 bytes). */ | |
453 | enum ofperr | |
454 | ofpraw_decode_partial(enum ofpraw *raw, | |
455 | const struct ofp_header *oh, size_t length) | |
456 | { | |
457 | struct ofphdrs hdrs; | |
458 | enum ofperr error; | |
459 | ||
460 | error = ofphdrs_decode(&hdrs, oh, length); | |
461 | if (!error) { | |
462 | error = ofpraw_from_ofphdrs(raw, &hdrs); | |
463 | } | |
464 | ||
465 | if (error) { | |
466 | *raw = 0; | |
467 | } | |
468 | return error; | |
469 | } | |
470 | \f | |
471 | /* Encoding messages using OFPRAW_* values. */ | |
472 | ||
473 | static void ofpraw_put__(enum ofpraw, uint8_t version, ovs_be32 xid, | |
474 | size_t extra_tailroom, struct ofpbuf *); | |
475 | ||
476 | /* Allocates and returns a new ofpbuf that contains an OpenFlow header for | |
477 | * 'raw' with OpenFlow version 'version' and a fresh OpenFlow transaction ID. | |
478 | * The ofpbuf has enough tailroom for the minimum body length of 'raw', plus | |
479 | * 'extra_tailroom' additional bytes. | |
480 | * | |
481 | * Each 'raw' value is valid only for certain OpenFlow versions. The caller | |
482 | * must specify a valid (raw, version) pair. | |
483 | * | |
484 | * In the returned ofpbuf, 'l2' points to the beginning of the OpenFlow header | |
485 | * and 'l3' points just after it, to where the message's body will start. The | |
486 | * caller must actually allocate the body into the space reserved for it, | |
487 | * e.g. with ofpbuf_put_uninit(). | |
488 | * | |
489 | * The caller owns the returned ofpbuf and must free it when it is no longer | |
490 | * needed, e.g. with ofpbuf_delete(). */ | |
491 | struct ofpbuf * | |
492 | ofpraw_alloc(enum ofpraw raw, uint8_t version, size_t extra_tailroom) | |
493 | { | |
494 | return ofpraw_alloc_xid(raw, version, alloc_xid(), extra_tailroom); | |
495 | } | |
496 | ||
497 | /* Same as ofpraw_alloc() but the caller provides the transaction ID. */ | |
498 | struct ofpbuf * | |
499 | ofpraw_alloc_xid(enum ofpraw raw, uint8_t version, ovs_be32 xid, | |
500 | size_t extra_tailroom) | |
501 | { | |
502 | struct ofpbuf *buf = ofpbuf_new(0); | |
503 | ofpraw_put__(raw, version, xid, extra_tailroom, buf); | |
504 | return buf; | |
505 | } | |
506 | ||
507 | /* Same as ofpraw_alloc(), but obtains the OpenFlow version and transaction ID | |
508 | * from 'request->version' and 'request->xid', respectively. | |
509 | * | |
510 | * Even though the version comes from 'request->version', the caller must still | |
511 | * know what it is doing, by specifying a valid pairing of 'raw' and | |
512 | * 'request->version', just like ofpraw_alloc(). */ | |
513 | struct ofpbuf * | |
514 | ofpraw_alloc_reply(enum ofpraw raw, const struct ofp_header *request, | |
515 | size_t extra_tailroom) | |
516 | { | |
517 | return ofpraw_alloc_xid(raw, request->version, request->xid, | |
518 | extra_tailroom); | |
519 | } | |
520 | ||
521 | /* Allocates and returns a new ofpbuf that contains an OpenFlow header that is | |
522 | * a stats reply to the stats request in 'request', using the same OpenFlow | |
523 | * version and transaction ID as 'request'. The ofpbuf has enough tailroom for | |
524 | * the stats reply's minimum body length, plus 'extra_tailroom' additional | |
525 | * bytes. | |
526 | * | |
527 | * 'request' must be a stats request, that is, an OFPRAW_OFPST* or OFPRAW_NXST* | |
528 | * value. Every stats request has a corresponding reply, so the (raw, version) | |
529 | * pairing pitfalls of the other ofpraw_alloc_*() functions don't apply here. | |
530 | * | |
531 | * In the returned ofpbuf, 'l2' points to the beginning of the OpenFlow header | |
532 | * and 'l3' points just after it, to where the message's body will start. The | |
533 | * caller must actually allocate the body into the space reserved for it, | |
534 | * e.g. with ofpbuf_put_uninit(). | |
535 | * | |
536 | * The caller owns the returned ofpbuf and must free it when it is no longer | |
537 | * needed, e.g. with ofpbuf_delete(). */ | |
538 | struct ofpbuf * | |
539 | ofpraw_alloc_stats_reply(const struct ofp_header *request, | |
540 | size_t extra_tailroom) | |
541 | { | |
542 | enum ofpraw request_raw; | |
543 | enum ofpraw reply_raw; | |
544 | enum ofperr error; | |
545 | ||
546 | error = ofpraw_decode_partial(&request_raw, request, | |
547 | ntohs(request->length)); | |
cb22974d | 548 | ovs_assert(!error); |
982697a4 BP |
549 | |
550 | reply_raw = ofpraw_stats_request_to_reply(request_raw, request->version); | |
cb22974d | 551 | ovs_assert(reply_raw); |
982697a4 BP |
552 | |
553 | return ofpraw_alloc_reply(reply_raw, request, extra_tailroom); | |
554 | } | |
555 | ||
556 | /* Appends to 'buf' an OpenFlow header for 'raw' with OpenFlow version | |
557 | * 'version' and a fresh OpenFlow transaction ID. Preallocates enough tailroom | |
558 | * in 'buf' for the minimum body length of 'raw', plus 'extra_tailroom' | |
559 | * additional bytes. | |
560 | * | |
561 | * Each 'raw' value is valid only for certain OpenFlow versions. The caller | |
562 | * must specify a valid (raw, version) pair. | |
563 | * | |
564 | * Upon return, 'buf->l2' points to the beginning of the OpenFlow header and | |
565 | * 'buf->l3' points just after it, to where the message's body will start. The | |
566 | * caller must actually allocating the body into the space reserved for it, | |
567 | * e.g. with ofpbuf_put_uninit(). */ | |
568 | void | |
569 | ofpraw_put(enum ofpraw raw, uint8_t version, struct ofpbuf *buf) | |
570 | { | |
571 | ofpraw_put__(raw, version, alloc_xid(), 0, buf); | |
572 | } | |
573 | ||
574 | /* Same as ofpraw_put() but the caller provides the transaction ID. */ | |
575 | void | |
576 | ofpraw_put_xid(enum ofpraw raw, uint8_t version, ovs_be32 xid, | |
577 | struct ofpbuf *buf) | |
578 | { | |
579 | ofpraw_put__(raw, version, xid, 0, buf); | |
580 | } | |
581 | ||
582 | /* Same as ofpraw_put(), but obtains the OpenFlow version and transaction ID | |
583 | * from 'request->version' and 'request->xid', respectively. | |
584 | * | |
585 | * Even though the version comes from 'request->version', the caller must still | |
586 | * know what it is doing, by specifying a valid pairing of 'raw' and | |
587 | * 'request->version', just like ofpraw_put(). */ | |
588 | void | |
589 | ofpraw_put_reply(enum ofpraw raw, const struct ofp_header *request, | |
590 | struct ofpbuf *buf) | |
591 | { | |
592 | ofpraw_put__(raw, request->version, request->xid, 0, buf); | |
593 | } | |
594 | ||
595 | /* Appends to 'buf' an OpenFlow header that is a stats reply to the stats | |
596 | * request in 'request', using the same OpenFlow version and transaction ID as | |
597 | * 'request'. Preallocate enough tailroom in 'buf for the stats reply's | |
598 | * minimum body length, plus 'extra_tailroom' additional bytes. | |
599 | * | |
600 | * 'request' must be a stats request, that is, an OFPRAW_OFPST* or OFPRAW_NXST* | |
601 | * value. Every stats request has a corresponding reply, so the (raw, version) | |
602 | * pairing pitfalls of the other ofpraw_alloc_*() functions don't apply here. | |
603 | * | |
604 | * In the returned ofpbuf, 'l2' points to the beginning of the OpenFlow header | |
605 | * and 'l3' points just after it, to where the message's body will start. The | |
606 | * caller must actually allocate the body into the space reserved for it, | |
607 | * e.g. with ofpbuf_put_uninit(). | |
608 | * | |
609 | * The caller owns the returned ofpbuf and must free it when it is no longer | |
610 | * needed, e.g. with ofpbuf_delete(). */ | |
611 | void | |
612 | ofpraw_put_stats_reply(const struct ofp_header *request, struct ofpbuf *buf) | |
613 | { | |
614 | enum ofperr error; | |
615 | enum ofpraw raw; | |
616 | ||
617 | error = ofpraw_decode_partial(&raw, request, ntohs(request->length)); | |
cb22974d | 618 | ovs_assert(!error); |
982697a4 BP |
619 | |
620 | raw = ofpraw_stats_request_to_reply(raw, request->version); | |
cb22974d | 621 | ovs_assert(raw); |
982697a4 BP |
622 | |
623 | ofpraw_put__(raw, request->version, request->xid, 0, buf); | |
624 | } | |
625 | ||
626 | static void | |
627 | ofpraw_put__(enum ofpraw raw, uint8_t version, ovs_be32 xid, | |
628 | size_t extra_tailroom, struct ofpbuf *buf) | |
629 | { | |
630 | const struct raw_info *info = raw_info_get(raw); | |
631 | const struct raw_instance *instance = raw_instance_get(info, version); | |
632 | const struct ofphdrs *hdrs = &instance->hdrs; | |
633 | struct ofp_header *oh; | |
634 | ||
635 | ofpbuf_prealloc_tailroom(buf, (instance->hdrs_len + info->min_body | |
636 | + extra_tailroom)); | |
637 | buf->l2 = ofpbuf_put_uninit(buf, instance->hdrs_len); | |
638 | buf->l3 = ofpbuf_tail(buf); | |
639 | ||
640 | oh = buf->l2; | |
641 | oh->version = version; | |
642 | oh->type = hdrs->type; | |
643 | oh->length = htons(buf->size); | |
644 | oh->xid = xid; | |
645 | ||
646 | if (hdrs->type == OFPT_VENDOR) { | |
647 | struct nicira_header *nh = buf->l2; | |
648 | ||
cb22974d | 649 | ovs_assert(hdrs->vendor == NX_VENDOR_ID); |
982697a4 BP |
650 | nh->vendor = htonl(hdrs->vendor); |
651 | nh->subtype = htonl(hdrs->subtype); | |
652 | } else if (version == OFP10_VERSION | |
653 | && (hdrs->type == OFPT10_STATS_REQUEST || | |
654 | hdrs->type == OFPT10_STATS_REPLY)) { | |
e2b9ac44 | 655 | struct ofp10_stats_msg *osm = buf->l2; |
982697a4 BP |
656 | |
657 | osm->type = htons(hdrs->stat); | |
658 | osm->flags = htons(0); | |
659 | ||
660 | if (hdrs->stat == OFPST_VENDOR) { | |
661 | struct ofp10_vendor_stats_msg *ovsm = buf->l2; | |
662 | ||
663 | ovsm->vendor = htonl(hdrs->vendor); | |
664 | if (hdrs->vendor == NX_VENDOR_ID) { | |
665 | struct nicira10_stats_msg *nsm = buf->l2; | |
666 | ||
667 | nsm->subtype = htonl(hdrs->subtype); | |
668 | memset(nsm->pad, 0, sizeof nsm->pad); | |
669 | } else { | |
670 | NOT_REACHED(); | |
671 | } | |
672 | } | |
673 | } else if (version != OFP10_VERSION | |
674 | && (hdrs->type == OFPT11_STATS_REQUEST || | |
675 | hdrs->type == OFPT11_STATS_REPLY)) { | |
676 | struct ofp11_stats_msg *osm = buf->l2; | |
677 | ||
678 | osm->type = htons(hdrs->stat); | |
679 | osm->flags = htons(0); | |
680 | memset(osm->pad, 0, sizeof osm->pad); | |
681 | ||
682 | if (hdrs->stat == OFPST_VENDOR) { | |
683 | struct ofp11_vendor_stats_msg *ovsm = buf->l2; | |
684 | ||
685 | ovsm->vendor = htonl(hdrs->vendor); | |
686 | if (hdrs->vendor == NX_VENDOR_ID) { | |
687 | struct nicira11_stats_msg *nsm = buf->l2; | |
688 | ||
689 | nsm->subtype = htonl(hdrs->subtype); | |
690 | } else { | |
691 | NOT_REACHED(); | |
692 | } | |
693 | } | |
694 | } | |
695 | } | |
696 | \f | |
697 | /* Returns 'raw''s name. | |
698 | * | |
699 | * The name is the name used for 'raw' in the OpenFlow specification. For | |
700 | * example, ofpraw_get_name(OFPRAW_OFPT10_FEATURES_REPLY) is | |
701 | * "OFPT_FEATURES_REPLY". | |
702 | * | |
703 | * The caller must not modify or free the returned string. */ | |
704 | const char * | |
705 | ofpraw_get_name(enum ofpraw raw) | |
706 | { | |
707 | return raw_info_get(raw)->name; | |
708 | } | |
709 | ||
710 | /* Returns the stats reply that corresponds to 'raw' in the given OpenFlow | |
711 | * 'version'. */ | |
712 | enum ofpraw | |
713 | ofpraw_stats_request_to_reply(enum ofpraw raw, uint8_t version) | |
714 | { | |
715 | const struct raw_info *info = raw_info_get(raw); | |
716 | const struct raw_instance *instance = raw_instance_get(info, version); | |
717 | enum ofpraw reply_raw; | |
718 | struct ofphdrs hdrs; | |
719 | enum ofperr error; | |
720 | ||
721 | hdrs = instance->hdrs; | |
2e3fa633 SH |
722 | switch ((enum ofp_version)hdrs.version) { |
723 | case OFP10_VERSION: | |
cb22974d | 724 | ovs_assert(hdrs.type == OFPT10_STATS_REQUEST); |
982697a4 | 725 | hdrs.type = OFPT10_STATS_REPLY; |
2e3fa633 SH |
726 | break; |
727 | case OFP11_VERSION: | |
728 | case OFP12_VERSION: | |
2e1ae200 | 729 | case OFP13_VERSION: |
cb22974d | 730 | ovs_assert(hdrs.type == OFPT11_STATS_REQUEST); |
982697a4 | 731 | hdrs.type = OFPT11_STATS_REPLY; |
2e3fa633 SH |
732 | break; |
733 | default: | |
734 | NOT_REACHED(); | |
982697a4 BP |
735 | } |
736 | ||
737 | error = ofpraw_from_ofphdrs(&reply_raw, &hdrs); | |
cb22974d | 738 | ovs_assert(!error); |
982697a4 BP |
739 | |
740 | return reply_raw; | |
741 | } | |
742 | \f | |
743 | /* Determines the OFPTYPE_* type of the OpenFlow message at 'oh', which has | |
744 | * length 'oh->length'. (The caller must ensure that 'oh->length' bytes of | |
745 | * data are readable at 'oh'.) On success, returns 0 and stores the type into | |
746 | * '*typep'. On failure, returns an OFPERR_* error code and zeros '*typep'. | |
747 | * | |
748 | * This function checks that 'oh' is a valid length for its particular type of | |
749 | * message, and returns an error if not. */ | |
750 | enum ofperr | |
751 | ofptype_decode(enum ofptype *typep, const struct ofp_header *oh) | |
752 | { | |
753 | enum ofperr error; | |
754 | enum ofpraw raw; | |
755 | ||
756 | error = ofpraw_decode(&raw, oh); | |
757 | *typep = error ? 0 : ofptype_from_ofpraw(raw); | |
758 | return error; | |
759 | } | |
760 | ||
761 | /* Determines the OFPTYPE_* type of the OpenFlow message in 'msg', which starts | |
762 | * at 'msg->data' and has length 'msg->size' bytes. On success, returns 0 and | |
763 | * stores the type into '*typep'. On failure, returns an OFPERR_* error code | |
764 | * and zeros '*typep'. | |
765 | * | |
766 | * This function checks that the message has a valid length for its particular | |
767 | * type of message, and returns an error if not. | |
768 | * | |
769 | * In addition to setting '*typep', this function pulls off the OpenFlow header | |
770 | * (including the stats headers, vendor header, and any subtype header) with | |
771 | * ofpbuf_pull(). It also sets 'msg->l2' to the start of the OpenFlow header | |
772 | * and 'msg->l3' just beyond the headers (that is, to the final value of | |
773 | * msg->data). */ | |
774 | enum ofperr | |
775 | ofptype_pull(enum ofptype *typep, struct ofpbuf *buf) | |
776 | { | |
777 | enum ofperr error; | |
778 | enum ofpraw raw; | |
779 | ||
780 | error = ofpraw_pull(&raw, buf); | |
781 | *typep = error ? 0 : ofptype_from_ofpraw(raw); | |
782 | return error; | |
783 | } | |
784 | ||
785 | /* Returns the OFPTYPE_* type that corresponds to 'raw'. | |
786 | * | |
787 | * (This is a one-way trip, because the mapping from ofpraw to ofptype is | |
788 | * many-to-one.) */ | |
789 | enum ofptype | |
790 | ofptype_from_ofpraw(enum ofpraw raw) | |
791 | { | |
792 | return raw_info_get(raw)->type; | |
793 | } | |
794 | \f | |
795 | /* Updates the 'length' field of the OpenFlow message in 'buf' to | |
796 | * 'buf->size'. */ | |
797 | void | |
798 | ofpmsg_update_length(struct ofpbuf *buf) | |
799 | { | |
800 | struct ofp_header *oh = ofpbuf_at_assert(buf, 0, sizeof *oh); | |
801 | oh->length = htons(buf->size); | |
802 | } | |
803 | ||
804 | /* Returns just past the Openflow header (including the stats headers, vendor | |
805 | * header, and any subtype header) in 'oh'. */ | |
806 | const void * | |
807 | ofpmsg_body(const struct ofp_header *oh) | |
808 | { | |
809 | struct ofphdrs hdrs; | |
810 | ||
811 | ofphdrs_decode_assert(&hdrs, oh, ntohs(oh->length)); | |
812 | return (const uint8_t *) oh + ofphdrs_len(&hdrs); | |
813 | } | |
814 | \f | |
79b8c36c BP |
815 | static ovs_be16 *ofpmp_flags__(const struct ofp_header *); |
816 | ||
982697a4 BP |
817 | /* Initializes 'replies' as a new list of stats messages that reply to |
818 | * 'request', which must be a stats request message. Initially the list will | |
819 | * consist of only a single reply part without any body. The caller should | |
820 | * use calls to the other ofpmp_*() functions to add to the body and split the | |
821 | * message into multiple parts, if necessary. */ | |
822 | void | |
823 | ofpmp_init(struct list *replies, const struct ofp_header *request) | |
824 | { | |
825 | struct ofpbuf *msg; | |
826 | ||
827 | list_init(replies); | |
828 | ||
829 | msg = ofpraw_alloc_stats_reply(request, 1000); | |
830 | list_push_back(replies, &msg->list_node); | |
831 | } | |
832 | ||
833 | /* Prepares to append up to 'len' bytes to the series of statistics replies in | |
834 | * 'replies', which should have been initialized with ofpmp_init(), if | |
835 | * necessary adding a new reply to the list. | |
836 | * | |
837 | * Returns an ofpbuf with at least 'len' bytes of tailroom. The 'len' bytes | |
838 | * have not actually been allocated, so the caller must do so with | |
839 | * e.g. ofpbuf_put_uninit(). */ | |
840 | struct ofpbuf * | |
841 | ofpmp_reserve(struct list *replies, size_t len) | |
842 | { | |
843 | struct ofpbuf *msg = ofpbuf_from_list(list_back(replies)); | |
844 | ||
845 | if (msg->size + len <= UINT16_MAX) { | |
846 | ofpbuf_prealloc_tailroom(msg, len); | |
847 | return msg; | |
848 | } else { | |
849 | unsigned int hdrs_len; | |
850 | struct ofpbuf *next; | |
851 | struct ofphdrs hdrs; | |
852 | ||
853 | ofphdrs_decode_assert(&hdrs, msg->data, msg->size); | |
854 | hdrs_len = ofphdrs_len(&hdrs); | |
855 | ||
856 | next = ofpbuf_new(MAX(1024, hdrs_len + len)); | |
857 | ofpbuf_put(next, msg->data, hdrs_len); | |
c0bf00b9 BP |
858 | next->l2 = next->data; |
859 | next->l3 = ofpbuf_tail(next); | |
982697a4 BP |
860 | list_push_back(replies, &next->list_node); |
861 | ||
79b8c36c BP |
862 | *ofpmp_flags__(msg->data) |= htons(OFPSF_REPLY_MORE); |
863 | ||
982697a4 BP |
864 | return next; |
865 | } | |
866 | } | |
867 | ||
868 | /* Appends 'len' bytes to the series of statistics replies in 'replies', and | |
869 | * returns the first byte. */ | |
870 | void * | |
871 | ofpmp_append(struct list *replies, size_t len) | |
872 | { | |
873 | return ofpbuf_put_uninit(ofpmp_reserve(replies, len), len); | |
874 | } | |
875 | ||
876 | /* Sometimes, when composing stats replies, it's difficult to predict how long | |
877 | * an individual reply chunk will be before actually encoding it into the reply | |
878 | * buffer. This function allows easy handling of this case: just encode the | |
879 | * reply, then use this function to break the message into two pieces if it | |
880 | * exceeds the OpenFlow message limit. | |
881 | * | |
882 | * In detail, if the final stats message in 'replies' is too long for OpenFlow, | |
883 | * this function breaks it into two separate stats replies, the first one with | |
884 | * the first 'start_ofs' bytes, the second one containing the bytes from that | |
885 | * offset onward. */ | |
886 | void | |
887 | ofpmp_postappend(struct list *replies, size_t start_ofs) | |
888 | { | |
889 | struct ofpbuf *msg = ofpbuf_from_list(list_back(replies)); | |
890 | ||
cb22974d | 891 | ovs_assert(start_ofs <= UINT16_MAX); |
982697a4 BP |
892 | if (msg->size > UINT16_MAX) { |
893 | size_t len = msg->size - start_ofs; | |
894 | memcpy(ofpmp_append(replies, len), | |
895 | (const uint8_t *) msg->data + start_ofs, len); | |
896 | msg->size = start_ofs; | |
897 | } | |
898 | } | |
899 | ||
900 | static ovs_be16 * | |
901 | ofpmp_flags__(const struct ofp_header *oh) | |
902 | { | |
2e3fa633 SH |
903 | switch ((enum ofp_version)oh->version) { |
904 | case OFP10_VERSION: | |
905 | return &((struct ofp10_stats_msg *) oh)->flags; | |
906 | case OFP11_VERSION: | |
907 | case OFP12_VERSION: | |
2e1ae200 | 908 | case OFP13_VERSION: |
2e3fa633 SH |
909 | return &((struct ofp11_stats_msg *) oh)->flags; |
910 | default: | |
911 | NOT_REACHED(); | |
912 | } | |
982697a4 BP |
913 | } |
914 | ||
915 | /* Returns the OFPSF_* flags found in the OpenFlow stats header of 'oh', which | |
916 | * must be an OpenFlow stats request or reply. | |
917 | * | |
918 | * (OFPSF_REPLY_MORE is the only defined flag.) */ | |
919 | uint16_t | |
920 | ofpmp_flags(const struct ofp_header *oh) | |
921 | { | |
922 | return ntohs(*ofpmp_flags__(oh)); | |
923 | } | |
924 | ||
925 | /* Returns true if the OFPSF_REPLY_MORE flag is set in the OpenFlow stats | |
926 | * header of 'oh', which must be an OpenFlow stats request or reply, false if | |
927 | * it is not set. */ | |
928 | bool | |
929 | ofpmp_more(const struct ofp_header *oh) | |
930 | { | |
931 | return (ofpmp_flags(oh) & OFPSF_REPLY_MORE) != 0; | |
932 | } | |
933 | \f | |
934 | static void ofpmsgs_init(void); | |
935 | ||
936 | static const struct raw_info * | |
937 | raw_info_get(enum ofpraw raw) | |
938 | { | |
939 | ofpmsgs_init(); | |
940 | ||
cb22974d | 941 | ovs_assert(raw < ARRAY_SIZE(raw_infos)); |
982697a4 BP |
942 | return &raw_infos[raw]; |
943 | } | |
944 | ||
945 | static struct raw_instance * | |
946 | raw_instance_get(const struct raw_info *info, uint8_t version) | |
947 | { | |
cb22974d | 948 | ovs_assert(version >= info->min_version && version <= info->max_version); |
982697a4 BP |
949 | return &info->instances[version - info->min_version]; |
950 | } | |
951 | ||
952 | static enum ofperr | |
953 | ofpraw_from_ofphdrs(enum ofpraw *raw, const struct ofphdrs *hdrs) | |
954 | { | |
955 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1); | |
956 | ||
957 | struct raw_instance *raw_hdrs; | |
958 | uint32_t hash; | |
959 | ||
960 | ofpmsgs_init(); | |
961 | ||
962 | hash = ofphdrs_hash(hdrs); | |
963 | HMAP_FOR_EACH_WITH_HASH (raw_hdrs, hmap_node, hash, &raw_instance_map) { | |
964 | if (ofphdrs_equal(hdrs, &raw_hdrs->hdrs)) { | |
965 | *raw = raw_hdrs->raw; | |
966 | return 0; | |
967 | } | |
968 | } | |
969 | ||
970 | if (!VLOG_DROP_WARN(&rl)) { | |
971 | struct ds s; | |
972 | ||
973 | ds_init(&s); | |
974 | ds_put_format(&s, "version %"PRIu8", type %"PRIu8, | |
975 | hdrs->version, hdrs->type); | |
976 | if (ofphdrs_is_stat(hdrs)) { | |
977 | ds_put_format(&s, ", stat %"PRIu16, hdrs->stat); | |
978 | } | |
979 | if (hdrs->vendor) { | |
980 | ds_put_format(&s, ", vendor 0x%"PRIx32", subtype %"PRIu32, | |
981 | hdrs->vendor, hdrs->subtype); | |
982 | } | |
983 | VLOG_WARN("unknown OpenFlow message (%s)", ds_cstr(&s)); | |
984 | ds_destroy(&s); | |
985 | } | |
986 | ||
987 | return (hdrs->vendor ? OFPERR_OFPBRC_BAD_SUBTYPE | |
988 | : ofphdrs_is_stat(hdrs) ? OFPERR_OFPBRC_BAD_STAT | |
989 | : OFPERR_OFPBRC_BAD_TYPE); | |
990 | } | |
991 | ||
992 | static void | |
993 | ofpmsgs_init(void) | |
994 | { | |
06717cbd | 995 | static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER; |
982697a4 BP |
996 | const struct raw_info *info; |
997 | ||
06717cbd | 998 | if (!ovsthread_once_start(&once)) { |
982697a4 BP |
999 | return; |
1000 | } | |
1001 | ||
1002 | hmap_init(&raw_instance_map); | |
1003 | for (info = raw_infos; info < &raw_infos[ARRAY_SIZE(raw_infos)]; info++) | |
1004 | { | |
1005 | int n_instances = info->max_version - info->min_version + 1; | |
1006 | struct raw_instance *inst; | |
1007 | ||
1008 | for (inst = info->instances; | |
1009 | inst < &info->instances[n_instances]; | |
1010 | inst++) { | |
1011 | inst->hdrs_len = ofphdrs_len(&inst->hdrs); | |
1012 | hmap_insert(&raw_instance_map, &inst->hmap_node, | |
1013 | ofphdrs_hash(&inst->hdrs)); | |
1014 | } | |
1015 | } | |
06717cbd BP |
1016 | |
1017 | ovsthread_once_done(&once); | |
982697a4 | 1018 | } |