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19a87e36 | 1 | /* |
e0edde6f | 2 | * Copyright (c) 2009, 2010, 2011, 2012 Nicira, Inc. |
19a87e36 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 | ||
19 | #include "connmgr.h" | |
20 | ||
21 | #include <errno.h> | |
22 | #include <stdlib.h> | |
23 | ||
24 | #include "coverage.h" | |
19a87e36 BP |
25 | #include "fail-open.h" |
26 | #include "in-band.h" | |
27 | #include "odp-util.h" | |
28 | #include "ofp-util.h" | |
29 | #include "ofpbuf.h" | |
5bee6e26 | 30 | #include "ofproto-provider.h" |
19a87e36 BP |
31 | #include "pinsched.h" |
32 | #include "poll-loop.h" | |
33 | #include "pktbuf.h" | |
34 | #include "rconn.h" | |
35 | #include "shash.h" | |
0d085684 | 36 | #include "simap.h" |
5bd31620 | 37 | #include "stream.h" |
19a87e36 BP |
38 | #include "timeval.h" |
39 | #include "vconn.h" | |
40 | #include "vlog.h" | |
41 | ||
42 | VLOG_DEFINE_THIS_MODULE(connmgr); | |
43 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
44 | ||
19a87e36 BP |
45 | /* An OpenFlow connection. */ |
46 | struct ofconn { | |
c4b31872 BP |
47 | /* Configuration that persists from one connection to the next. */ |
48 | ||
19a87e36 | 49 | struct list node; /* In struct connmgr's "all_conns" list. */ |
c4b31872 BP |
50 | struct hmap_node hmap_node; /* In struct connmgr's "controllers" map. */ |
51 | ||
52 | struct connmgr *connmgr; /* Connection's manager. */ | |
19a87e36 BP |
53 | struct rconn *rconn; /* OpenFlow connection. */ |
54 | enum ofconn_type type; /* Type. */ | |
c4b31872 | 55 | enum ofproto_band band; /* In-band or out-of-band? */ |
9886b662 | 56 | bool enable_async_msgs; /* Initially enable async messages? */ |
c4b31872 BP |
57 | |
58 | /* State that should be cleared from one connection to the next. */ | |
59 | ||
60 | /* OpenFlow state. */ | |
61 | enum nx_role role; /* Role. */ | |
27527aa0 | 62 | enum ofputil_protocol protocol; /* Current protocol variant. */ |
54834960 | 63 | enum nx_packet_in_format packet_in_format; /* OFPT_PACKET_IN format. */ |
19a87e36 | 64 | |
7ee20df1 BP |
65 | /* Asynchronous flow table operation support. */ |
66 | struct list opgroups; /* Contains pending "ofopgroups", if any. */ | |
67 | struct ofpbuf *blocked; /* Postponed OpenFlow message, if any. */ | |
68 | bool retry; /* True if 'blocked' is ready to try again. */ | |
69 | ||
19a87e36 BP |
70 | /* OFPT_PACKET_IN related data. */ |
71 | struct rconn_packet_counter *packet_in_counter; /* # queued on 'rconn'. */ | |
72 | #define N_SCHEDULERS 2 | |
73 | struct pinsched *schedulers[N_SCHEDULERS]; | |
74 | struct pktbuf *pktbuf; /* OpenFlow packet buffers. */ | |
75 | int miss_send_len; /* Bytes to send of buffered packets. */ | |
a7349929 | 76 | uint16_t controller_id; /* Connection controller ID. */ |
19a87e36 BP |
77 | |
78 | /* Number of OpenFlow messages queued on 'rconn' as replies to OpenFlow | |
79 | * requests, and the maximum number before we stop reading OpenFlow | |
80 | * requests. */ | |
81 | #define OFCONN_REPLY_MAX 100 | |
82 | struct rconn_packet_counter *reply_counter; | |
80d5aefd BP |
83 | |
84 | /* Asynchronous message configuration in each possible roles. | |
85 | * | |
86 | * A 1-bit enables sending an asynchronous message for one possible reason | |
87 | * that the message might be generated, a 0-bit disables it. */ | |
88 | uint32_t master_async_config[OAM_N_TYPES]; /* master, other */ | |
89 | uint32_t slave_async_config[OAM_N_TYPES]; /* slave */ | |
19a87e36 BP |
90 | }; |
91 | ||
92 | static struct ofconn *ofconn_create(struct connmgr *, struct rconn *, | |
9886b662 | 93 | enum ofconn_type, bool enable_async_msgs); |
19a87e36 | 94 | static void ofconn_destroy(struct ofconn *); |
c4b31872 | 95 | static void ofconn_flush(struct ofconn *); |
19a87e36 BP |
96 | |
97 | static void ofconn_reconfigure(struct ofconn *, | |
98 | const struct ofproto_controller *); | |
99 | ||
100 | static void ofconn_run(struct ofconn *, | |
7ee20df1 | 101 | bool (*handle_openflow)(struct ofconn *, |
19a87e36 | 102 | struct ofpbuf *ofp_msg)); |
7ee20df1 | 103 | static void ofconn_wait(struct ofconn *, bool handling_openflow); |
19a87e36 BP |
104 | |
105 | static const char *ofconn_get_target(const struct ofconn *); | |
106 | static char *ofconn_make_name(const struct connmgr *, const char *target); | |
107 | ||
108 | static void ofconn_set_rate_limit(struct ofconn *, int rate, int burst); | |
109 | ||
19a87e36 BP |
110 | static void ofconn_send(const struct ofconn *, struct ofpbuf *, |
111 | struct rconn_packet_counter *); | |
112 | ||
113 | static void do_send_packet_in(struct ofpbuf *, void *ofconn_); | |
114 | ||
115 | /* A listener for incoming OpenFlow "service" connections. */ | |
116 | struct ofservice { | |
117 | struct hmap_node node; /* In struct connmgr's "services" hmap. */ | |
118 | struct pvconn *pvconn; /* OpenFlow connection listener. */ | |
119 | ||
120 | /* These are not used by ofservice directly. They are settings for | |
121 | * accepted "struct ofconn"s from the pvconn. */ | |
122 | int probe_interval; /* Max idle time before probing, in seconds. */ | |
123 | int rate_limit; /* Max packet-in rate in packets per second. */ | |
124 | int burst_limit; /* Limit on accumulating packet credits. */ | |
9886b662 | 125 | bool enable_async_msgs; /* Initially enable async messages? */ |
f125905c | 126 | uint8_t dscp; /* DSCP Value for controller connection */ |
19a87e36 BP |
127 | }; |
128 | ||
129 | static void ofservice_reconfigure(struct ofservice *, | |
130 | const struct ofproto_controller *); | |
f125905c | 131 | static int ofservice_create(struct connmgr *, const char *target, uint8_t dscp); |
19a87e36 BP |
132 | static void ofservice_destroy(struct connmgr *, struct ofservice *); |
133 | static struct ofservice *ofservice_lookup(struct connmgr *, | |
134 | const char *target); | |
135 | ||
136 | /* Connection manager for an OpenFlow switch. */ | |
137 | struct connmgr { | |
138 | struct ofproto *ofproto; | |
139 | char *name; | |
140 | char *local_port_name; | |
141 | ||
142 | /* OpenFlow connections. */ | |
143 | struct hmap controllers; /* Controller "struct ofconn"s. */ | |
144 | struct list all_conns; /* Contains "struct ofconn"s. */ | |
145 | ||
146 | /* OpenFlow listeners. */ | |
147 | struct hmap services; /* Contains "struct ofservice"s. */ | |
148 | struct pvconn **snoops; | |
149 | size_t n_snoops; | |
150 | ||
151 | /* Fail open. */ | |
152 | struct fail_open *fail_open; | |
153 | enum ofproto_fail_mode fail_mode; | |
154 | ||
155 | /* In-band control. */ | |
156 | struct in_band *in_band; | |
19a87e36 BP |
157 | struct sockaddr_in *extra_in_band_remotes; |
158 | size_t n_extra_remotes; | |
159 | int in_band_queue; | |
160 | }; | |
161 | ||
162 | static void update_in_band_remotes(struct connmgr *); | |
163 | static void add_snooper(struct connmgr *, struct vconn *); | |
164 | ||
165 | /* Creates and returns a new connection manager owned by 'ofproto'. 'name' is | |
166 | * a name for the ofproto suitable for using in log messages. | |
167 | * 'local_port_name' is the name of the local port (OFPP_LOCAL) within | |
168 | * 'ofproto'. */ | |
169 | struct connmgr * | |
170 | connmgr_create(struct ofproto *ofproto, | |
171 | const char *name, const char *local_port_name) | |
172 | { | |
173 | struct connmgr *mgr; | |
174 | ||
175 | mgr = xmalloc(sizeof *mgr); | |
176 | mgr->ofproto = ofproto; | |
177 | mgr->name = xstrdup(name); | |
178 | mgr->local_port_name = xstrdup(local_port_name); | |
179 | ||
180 | hmap_init(&mgr->controllers); | |
181 | list_init(&mgr->all_conns); | |
182 | ||
183 | hmap_init(&mgr->services); | |
184 | mgr->snoops = NULL; | |
185 | mgr->n_snoops = 0; | |
186 | ||
187 | mgr->fail_open = NULL; | |
188 | mgr->fail_mode = OFPROTO_FAIL_SECURE; | |
189 | ||
190 | mgr->in_band = NULL; | |
19a87e36 BP |
191 | mgr->extra_in_band_remotes = NULL; |
192 | mgr->n_extra_remotes = 0; | |
193 | mgr->in_band_queue = -1; | |
194 | ||
195 | return mgr; | |
196 | } | |
197 | ||
198 | /* Frees 'mgr' and all of its resources. */ | |
199 | void | |
200 | connmgr_destroy(struct connmgr *mgr) | |
201 | { | |
202 | struct ofservice *ofservice, *next_ofservice; | |
203 | struct ofconn *ofconn, *next_ofconn; | |
204 | size_t i; | |
205 | ||
206 | if (!mgr) { | |
207 | return; | |
208 | } | |
209 | ||
210 | LIST_FOR_EACH_SAFE (ofconn, next_ofconn, node, &mgr->all_conns) { | |
211 | ofconn_destroy(ofconn); | |
212 | } | |
213 | hmap_destroy(&mgr->controllers); | |
214 | ||
215 | HMAP_FOR_EACH_SAFE (ofservice, next_ofservice, node, &mgr->services) { | |
216 | ofservice_destroy(mgr, ofservice); | |
217 | } | |
218 | hmap_destroy(&mgr->services); | |
219 | ||
220 | for (i = 0; i < mgr->n_snoops; i++) { | |
221 | pvconn_close(mgr->snoops[i]); | |
222 | } | |
223 | free(mgr->snoops); | |
224 | ||
225 | fail_open_destroy(mgr->fail_open); | |
226 | mgr->fail_open = NULL; | |
227 | ||
228 | in_band_destroy(mgr->in_band); | |
229 | mgr->in_band = NULL; | |
230 | free(mgr->extra_in_band_remotes); | |
231 | free(mgr->name); | |
232 | free(mgr->local_port_name); | |
233 | ||
234 | free(mgr); | |
235 | } | |
236 | ||
7ee20df1 BP |
237 | /* Does all of the periodic maintenance required by 'mgr'. |
238 | * | |
239 | * If 'handle_openflow' is nonnull, calls 'handle_openflow' for each message | |
240 | * received on an OpenFlow connection, passing along the OpenFlow connection | |
241 | * itself and the message that was sent. If 'handle_openflow' returns true, | |
242 | * the message is considered to be fully processed. If 'handle_openflow' | |
243 | * returns false, the message is considered not to have been processed at all; | |
244 | * it will be stored and re-presented to 'handle_openflow' following the next | |
245 | * call to connmgr_retry(). 'handle_openflow' must not modify or free the | |
246 | * message. | |
247 | * | |
248 | * If 'handle_openflow' is NULL, no OpenFlow messages will be processed and | |
249 | * other activities that could affect the flow table (in-band processing, | |
250 | * fail-open processing) are suppressed too. */ | |
19a87e36 BP |
251 | void |
252 | connmgr_run(struct connmgr *mgr, | |
7ee20df1 | 253 | bool (*handle_openflow)(struct ofconn *, struct ofpbuf *ofp_msg)) |
19a87e36 BP |
254 | { |
255 | struct ofconn *ofconn, *next_ofconn; | |
256 | struct ofservice *ofservice; | |
257 | size_t i; | |
258 | ||
7ee20df1 | 259 | if (handle_openflow && mgr->in_band) { |
6da1e809 BP |
260 | if (!in_band_run(mgr->in_band)) { |
261 | in_band_destroy(mgr->in_band); | |
262 | mgr->in_band = NULL; | |
263 | } | |
19a87e36 BP |
264 | } |
265 | ||
266 | LIST_FOR_EACH_SAFE (ofconn, next_ofconn, node, &mgr->all_conns) { | |
267 | ofconn_run(ofconn, handle_openflow); | |
268 | } | |
269 | ||
270 | /* Fail-open maintenance. Do this after processing the ofconns since | |
271 | * fail-open checks the status of the controller rconn. */ | |
7ee20df1 | 272 | if (handle_openflow && mgr->fail_open) { |
19a87e36 BP |
273 | fail_open_run(mgr->fail_open); |
274 | } | |
275 | ||
276 | HMAP_FOR_EACH (ofservice, node, &mgr->services) { | |
277 | struct vconn *vconn; | |
278 | int retval; | |
279 | ||
87ea5e5e | 280 | retval = pvconn_accept(ofservice->pvconn, OFP10_VERSION, &vconn); |
19a87e36 BP |
281 | if (!retval) { |
282 | struct rconn *rconn; | |
283 | char *name; | |
284 | ||
f125905c MM |
285 | /* Passing default value for creation of the rconn */ |
286 | rconn = rconn_create(ofservice->probe_interval, 0, ofservice->dscp); | |
19a87e36 BP |
287 | name = ofconn_make_name(mgr, vconn_get_name(vconn)); |
288 | rconn_connect_unreliably(rconn, vconn, name); | |
289 | free(name); | |
290 | ||
9886b662 BP |
291 | ofconn = ofconn_create(mgr, rconn, OFCONN_SERVICE, |
292 | ofservice->enable_async_msgs); | |
19a87e36 BP |
293 | ofconn_set_rate_limit(ofconn, ofservice->rate_limit, |
294 | ofservice->burst_limit); | |
295 | } else if (retval != EAGAIN) { | |
296 | VLOG_WARN_RL(&rl, "accept failed (%s)", strerror(retval)); | |
297 | } | |
298 | } | |
299 | ||
300 | for (i = 0; i < mgr->n_snoops; i++) { | |
301 | struct vconn *vconn; | |
302 | int retval; | |
303 | ||
87ea5e5e | 304 | retval = pvconn_accept(mgr->snoops[i], OFP10_VERSION, &vconn); |
19a87e36 BP |
305 | if (!retval) { |
306 | add_snooper(mgr, vconn); | |
307 | } else if (retval != EAGAIN) { | |
308 | VLOG_WARN_RL(&rl, "accept failed (%s)", strerror(retval)); | |
309 | } | |
310 | } | |
311 | } | |
312 | ||
7ee20df1 BP |
313 | /* Causes the poll loop to wake up when connmgr_run() needs to run. |
314 | * | |
315 | * If 'handling_openflow' is true, arriving OpenFlow messages and other | |
316 | * activities that affect the flow table will wake up the poll loop. If | |
317 | * 'handling_openflow' is false, they will not. */ | |
19a87e36 | 318 | void |
7ee20df1 | 319 | connmgr_wait(struct connmgr *mgr, bool handling_openflow) |
19a87e36 BP |
320 | { |
321 | struct ofservice *ofservice; | |
322 | struct ofconn *ofconn; | |
323 | size_t i; | |
324 | ||
325 | LIST_FOR_EACH (ofconn, node, &mgr->all_conns) { | |
7ee20df1 | 326 | ofconn_wait(ofconn, handling_openflow); |
19a87e36 | 327 | } |
7ee20df1 | 328 | if (handling_openflow && mgr->in_band) { |
19a87e36 BP |
329 | in_band_wait(mgr->in_band); |
330 | } | |
7ee20df1 | 331 | if (handling_openflow && mgr->fail_open) { |
19a87e36 BP |
332 | fail_open_wait(mgr->fail_open); |
333 | } | |
334 | HMAP_FOR_EACH (ofservice, node, &mgr->services) { | |
335 | pvconn_wait(ofservice->pvconn); | |
336 | } | |
337 | for (i = 0; i < mgr->n_snoops; i++) { | |
338 | pvconn_wait(mgr->snoops[i]); | |
339 | } | |
340 | } | |
341 | ||
0d085684 BP |
342 | /* Adds some memory usage statistics for 'mgr' into 'usage', for use with |
343 | * memory_report(). */ | |
344 | void | |
345 | connmgr_get_memory_usage(const struct connmgr *mgr, struct simap *usage) | |
346 | { | |
347 | const struct ofconn *ofconn; | |
348 | unsigned int packets = 0; | |
349 | unsigned int ofconns = 0; | |
350 | ||
351 | LIST_FOR_EACH (ofconn, node, &mgr->all_conns) { | |
352 | int i; | |
353 | ||
354 | ofconns++; | |
355 | ||
356 | packets += rconn_count_txqlen(ofconn->rconn); | |
357 | for (i = 0; i < N_SCHEDULERS; i++) { | |
358 | packets += pinsched_count_txqlen(ofconn->schedulers[i]); | |
359 | } | |
360 | packets += pktbuf_count_packets(ofconn->pktbuf); | |
361 | } | |
362 | simap_increase(usage, "ofconns", ofconns); | |
363 | simap_increase(usage, "packets", packets); | |
364 | } | |
365 | ||
19a87e36 BP |
366 | /* Returns the ofproto that owns 'ofconn''s connmgr. */ |
367 | struct ofproto * | |
368 | ofconn_get_ofproto(const struct ofconn *ofconn) | |
369 | { | |
370 | return ofconn->connmgr->ofproto; | |
371 | } | |
7ee20df1 BP |
372 | |
373 | /* If processing of OpenFlow messages was blocked on any 'mgr' ofconns by | |
374 | * returning false to the 'handle_openflow' callback to connmgr_run(), this | |
375 | * re-enables them. */ | |
376 | void | |
377 | connmgr_retry(struct connmgr *mgr) | |
378 | { | |
379 | struct ofconn *ofconn; | |
380 | ||
381 | LIST_FOR_EACH (ofconn, node, &mgr->all_conns) { | |
382 | ofconn->retry = true; | |
383 | } | |
384 | } | |
19a87e36 BP |
385 | \f |
386 | /* OpenFlow configuration. */ | |
387 | ||
f125905c | 388 | static void add_controller(struct connmgr *, const char *target, uint8_t dscp); |
19a87e36 BP |
389 | static struct ofconn *find_controller_by_target(struct connmgr *, |
390 | const char *target); | |
391 | static void update_fail_open(struct connmgr *); | |
392 | static int set_pvconns(struct pvconn ***pvconnsp, size_t *n_pvconnsp, | |
81e2083f | 393 | const struct sset *); |
19a87e36 BP |
394 | |
395 | /* Returns true if 'mgr' has any configured primary controllers. | |
396 | * | |
397 | * Service controllers do not count, but configured primary controllers do | |
398 | * count whether or not they are currently connected. */ | |
399 | bool | |
400 | connmgr_has_controllers(const struct connmgr *mgr) | |
401 | { | |
402 | return !hmap_is_empty(&mgr->controllers); | |
403 | } | |
404 | ||
405 | /* Initializes 'info' and populates it with information about each configured | |
406 | * primary controller. The keys in 'info' are the controllers' targets; the | |
407 | * data values are corresponding "struct ofproto_controller_info". | |
408 | * | |
409 | * The caller owns 'info' and everything in it and should free it when it is no | |
410 | * longer needed. */ | |
411 | void | |
412 | connmgr_get_controller_info(struct connmgr *mgr, struct shash *info) | |
413 | { | |
414 | const struct ofconn *ofconn; | |
415 | ||
19a87e36 BP |
416 | HMAP_FOR_EACH (ofconn, hmap_node, &mgr->controllers) { |
417 | const struct rconn *rconn = ofconn->rconn; | |
5d279086 | 418 | const char *target = rconn_get_target(rconn); |
19a87e36 | 419 | |
5d279086 AE |
420 | if (!shash_find(info, target)) { |
421 | struct ofproto_controller_info *cinfo = xmalloc(sizeof *cinfo); | |
422 | time_t now = time_now(); | |
423 | time_t last_connection = rconn_get_last_connection(rconn); | |
424 | time_t last_disconnect = rconn_get_last_disconnect(rconn); | |
425 | int last_error = rconn_get_last_error(rconn); | |
19a87e36 | 426 | |
5d279086 | 427 | shash_add(info, target, cinfo); |
19a87e36 | 428 | |
5d279086 AE |
429 | cinfo->is_connected = rconn_is_connected(rconn); |
430 | cinfo->role = ofconn->role; | |
19a87e36 | 431 | |
5d279086 | 432 | cinfo->pairs.n = 0; |
19a87e36 | 433 | |
5d279086 AE |
434 | if (last_error) { |
435 | cinfo->pairs.keys[cinfo->pairs.n] = "last_error"; | |
436 | cinfo->pairs.values[cinfo->pairs.n++] | |
437 | = xstrdup(ovs_retval_to_string(last_error)); | |
438 | } | |
19a87e36 | 439 | |
5d279086 | 440 | cinfo->pairs.keys[cinfo->pairs.n] = "state"; |
19a87e36 | 441 | cinfo->pairs.values[cinfo->pairs.n++] |
5d279086 AE |
442 | = xstrdup(rconn_get_state(rconn)); |
443 | ||
444 | if (last_connection != TIME_MIN) { | |
445 | cinfo->pairs.keys[cinfo->pairs.n] = "sec_since_connect"; | |
446 | cinfo->pairs.values[cinfo->pairs.n++] | |
447 | = xasprintf("%ld", (long int) (now - last_connection)); | |
448 | } | |
449 | ||
450 | if (last_disconnect != TIME_MIN) { | |
451 | cinfo->pairs.keys[cinfo->pairs.n] = "sec_since_disconnect"; | |
452 | cinfo->pairs.values[cinfo->pairs.n++] | |
453 | = xasprintf("%ld", (long int) (now - last_disconnect)); | |
454 | } | |
19a87e36 BP |
455 | } |
456 | } | |
457 | } | |
458 | ||
72ba2ed3 AE |
459 | void |
460 | connmgr_free_controller_info(struct shash *info) | |
461 | { | |
462 | struct shash_node *node; | |
463 | ||
464 | SHASH_FOR_EACH (node, info) { | |
465 | struct ofproto_controller_info *cinfo = node->data; | |
466 | while (cinfo->pairs.n) { | |
467 | free((char *) cinfo->pairs.values[--cinfo->pairs.n]); | |
468 | } | |
469 | free(cinfo); | |
470 | } | |
471 | shash_destroy(info); | |
472 | } | |
473 | ||
19a87e36 BP |
474 | /* Changes 'mgr''s set of controllers to the 'n_controllers' controllers in |
475 | * 'controllers'. */ | |
476 | void | |
477 | connmgr_set_controllers(struct connmgr *mgr, | |
478 | const struct ofproto_controller *controllers, | |
479 | size_t n_controllers) | |
480 | { | |
08fd19f0 | 481 | bool had_controllers = connmgr_has_controllers(mgr); |
19a87e36 BP |
482 | struct shash new_controllers; |
483 | struct ofconn *ofconn, *next_ofconn; | |
484 | struct ofservice *ofservice, *next_ofservice; | |
19a87e36 BP |
485 | size_t i; |
486 | ||
487 | /* Create newly configured controllers and services. | |
488 | * Create a name to ofproto_controller mapping in 'new_controllers'. */ | |
489 | shash_init(&new_controllers); | |
490 | for (i = 0; i < n_controllers; i++) { | |
491 | const struct ofproto_controller *c = &controllers[i]; | |
492 | ||
493 | if (!vconn_verify_name(c->target)) { | |
494 | if (!find_controller_by_target(mgr, c->target)) { | |
1ea9e609 BP |
495 | VLOG_INFO("%s: added primary controller \"%s\"", |
496 | mgr->name, c->target); | |
f125905c | 497 | add_controller(mgr, c->target, c->dscp); |
19a87e36 BP |
498 | } |
499 | } else if (!pvconn_verify_name(c->target)) { | |
500 | if (!ofservice_lookup(mgr, c->target)) { | |
1ea9e609 BP |
501 | VLOG_INFO("%s: added service controller \"%s\"", |
502 | mgr->name, c->target); | |
f125905c | 503 | ofservice_create(mgr, c->target, c->dscp); |
19a87e36 BP |
504 | } |
505 | } else { | |
506 | VLOG_WARN_RL(&rl, "%s: unsupported controller \"%s\"", | |
507 | mgr->name, c->target); | |
508 | continue; | |
509 | } | |
510 | ||
511 | shash_add_once(&new_controllers, c->target, &controllers[i]); | |
512 | } | |
513 | ||
514 | /* Delete controllers that are no longer configured. | |
515 | * Update configuration of all now-existing controllers. */ | |
19a87e36 | 516 | HMAP_FOR_EACH_SAFE (ofconn, next_ofconn, hmap_node, &mgr->controllers) { |
1ea9e609 | 517 | const char *target = ofconn_get_target(ofconn); |
19a87e36 BP |
518 | struct ofproto_controller *c; |
519 | ||
1ea9e609 | 520 | c = shash_find_data(&new_controllers, target); |
19a87e36 | 521 | if (!c) { |
1ea9e609 BP |
522 | VLOG_INFO("%s: removed primary controller \"%s\"", |
523 | mgr->name, target); | |
19a87e36 BP |
524 | ofconn_destroy(ofconn); |
525 | } else { | |
526 | ofconn_reconfigure(ofconn, c); | |
527 | } | |
528 | } | |
529 | ||
530 | /* Delete services that are no longer configured. | |
531 | * Update configuration of all now-existing services. */ | |
532 | HMAP_FOR_EACH_SAFE (ofservice, next_ofservice, node, &mgr->services) { | |
1ea9e609 | 533 | const char *target = pvconn_get_name(ofservice->pvconn); |
19a87e36 BP |
534 | struct ofproto_controller *c; |
535 | ||
1ea9e609 | 536 | c = shash_find_data(&new_controllers, target); |
19a87e36 | 537 | if (!c) { |
1ea9e609 BP |
538 | VLOG_INFO("%s: removed service controller \"%s\"", |
539 | mgr->name, target); | |
19a87e36 BP |
540 | ofservice_destroy(mgr, ofservice); |
541 | } else { | |
542 | ofservice_reconfigure(ofservice, c); | |
543 | } | |
544 | } | |
545 | ||
546 | shash_destroy(&new_controllers); | |
547 | ||
548 | update_in_band_remotes(mgr); | |
549 | update_fail_open(mgr); | |
08fd19f0 BP |
550 | if (had_controllers != connmgr_has_controllers(mgr)) { |
551 | ofproto_flush_flows(mgr->ofproto); | |
552 | } | |
19a87e36 BP |
553 | } |
554 | ||
555 | /* Drops the connections between 'mgr' and all of its primary and secondary | |
556 | * controllers, forcing them to reconnect. */ | |
557 | void | |
558 | connmgr_reconnect(const struct connmgr *mgr) | |
559 | { | |
560 | struct ofconn *ofconn; | |
561 | ||
562 | LIST_FOR_EACH (ofconn, node, &mgr->all_conns) { | |
563 | rconn_reconnect(ofconn->rconn); | |
564 | } | |
565 | } | |
566 | ||
567 | /* Sets the "snoops" for 'mgr' to the pvconn targets listed in 'snoops'. | |
568 | * | |
569 | * A "snoop" is a pvconn to which every OpenFlow message to or from the most | |
570 | * important controller on 'mgr' is mirrored. */ | |
571 | int | |
81e2083f | 572 | connmgr_set_snoops(struct connmgr *mgr, const struct sset *snoops) |
19a87e36 BP |
573 | { |
574 | return set_pvconns(&mgr->snoops, &mgr->n_snoops, snoops); | |
575 | } | |
576 | ||
577 | /* Adds each of the snoops currently configured on 'mgr' to 'snoops'. */ | |
578 | void | |
81e2083f | 579 | connmgr_get_snoops(const struct connmgr *mgr, struct sset *snoops) |
19a87e36 BP |
580 | { |
581 | size_t i; | |
582 | ||
583 | for (i = 0; i < mgr->n_snoops; i++) { | |
81e2083f | 584 | sset_add(snoops, pvconn_get_name(mgr->snoops[i])); |
19a87e36 BP |
585 | } |
586 | } | |
587 | ||
81e2083f BP |
588 | /* Returns true if 'mgr' has at least one snoop, false if it has none. */ |
589 | bool | |
590 | connmgr_has_snoops(const struct connmgr *mgr) | |
591 | { | |
592 | return mgr->n_snoops > 0; | |
593 | } | |
594 | ||
19a87e36 BP |
595 | /* Creates a new controller for 'target' in 'mgr'. update_controller() needs |
596 | * to be called later to finish the new ofconn's configuration. */ | |
597 | static void | |
f125905c | 598 | add_controller(struct connmgr *mgr, const char *target, uint8_t dscp) |
19a87e36 BP |
599 | { |
600 | char *name = ofconn_make_name(mgr, target); | |
601 | struct ofconn *ofconn; | |
602 | ||
f125905c | 603 | ofconn = ofconn_create(mgr, rconn_create(5, 8, dscp), OFCONN_PRIMARY, true); |
19a87e36 | 604 | ofconn->pktbuf = pktbuf_create(); |
19a87e36 BP |
605 | rconn_connect(ofconn->rconn, target, name); |
606 | hmap_insert(&mgr->controllers, &ofconn->hmap_node, hash_string(target, 0)); | |
607 | ||
608 | free(name); | |
609 | } | |
610 | ||
611 | static struct ofconn * | |
612 | find_controller_by_target(struct connmgr *mgr, const char *target) | |
613 | { | |
614 | struct ofconn *ofconn; | |
615 | ||
616 | HMAP_FOR_EACH_WITH_HASH (ofconn, hmap_node, | |
617 | hash_string(target, 0), &mgr->controllers) { | |
618 | if (!strcmp(ofconn_get_target(ofconn), target)) { | |
619 | return ofconn; | |
620 | } | |
621 | } | |
622 | return NULL; | |
623 | } | |
624 | ||
625 | static void | |
626 | update_in_band_remotes(struct connmgr *mgr) | |
627 | { | |
628 | struct sockaddr_in *addrs; | |
629 | size_t max_addrs, n_addrs; | |
630 | struct ofconn *ofconn; | |
631 | size_t i; | |
632 | ||
633 | /* Allocate enough memory for as many remotes as we could possibly have. */ | |
634 | max_addrs = mgr->n_extra_remotes + hmap_count(&mgr->controllers); | |
635 | addrs = xmalloc(max_addrs * sizeof *addrs); | |
636 | n_addrs = 0; | |
637 | ||
638 | /* Add all the remotes. */ | |
639 | HMAP_FOR_EACH (ofconn, hmap_node, &mgr->controllers) { | |
640 | struct sockaddr_in *sin = &addrs[n_addrs]; | |
ac4c900d | 641 | const char *target = rconn_get_target(ofconn->rconn); |
19a87e36 BP |
642 | |
643 | if (ofconn->band == OFPROTO_OUT_OF_BAND) { | |
644 | continue; | |
645 | } | |
646 | ||
ac4c900d AA |
647 | if (stream_parse_target_with_default_ports(target, |
648 | OFP_TCP_PORT, | |
649 | OFP_SSL_PORT, | |
650 | sin)) { | |
19a87e36 BP |
651 | n_addrs++; |
652 | } | |
653 | } | |
654 | for (i = 0; i < mgr->n_extra_remotes; i++) { | |
655 | addrs[n_addrs++] = mgr->extra_in_band_remotes[i]; | |
656 | } | |
657 | ||
658 | /* Create or update or destroy in-band. */ | |
659 | if (n_addrs) { | |
660 | if (!mgr->in_band) { | |
661 | in_band_create(mgr->ofproto, mgr->local_port_name, &mgr->in_band); | |
662 | } | |
19a87e36 | 663 | in_band_set_queue(mgr->in_band, mgr->in_band_queue); |
19a87e36 | 664 | } else { |
6da1e809 BP |
665 | /* in_band_run() needs a chance to delete any existing in-band flows. |
666 | * We will destroy mgr->in_band after it's done with that. */ | |
667 | } | |
668 | if (mgr->in_band) { | |
669 | in_band_set_remotes(mgr->in_band, addrs, n_addrs); | |
19a87e36 BP |
670 | } |
671 | ||
672 | /* Clean up. */ | |
673 | free(addrs); | |
674 | } | |
675 | ||
676 | static void | |
677 | update_fail_open(struct connmgr *mgr) | |
678 | { | |
679 | if (connmgr_has_controllers(mgr) | |
680 | && mgr->fail_mode == OFPROTO_FAIL_STANDALONE) { | |
681 | if (!mgr->fail_open) { | |
682 | mgr->fail_open = fail_open_create(mgr->ofproto, mgr); | |
683 | } | |
684 | } else { | |
685 | fail_open_destroy(mgr->fail_open); | |
686 | mgr->fail_open = NULL; | |
687 | } | |
688 | } | |
689 | ||
690 | static int | |
691 | set_pvconns(struct pvconn ***pvconnsp, size_t *n_pvconnsp, | |
81e2083f | 692 | const struct sset *sset) |
19a87e36 BP |
693 | { |
694 | struct pvconn **pvconns = *pvconnsp; | |
695 | size_t n_pvconns = *n_pvconnsp; | |
81e2083f | 696 | const char *name; |
19a87e36 BP |
697 | int retval = 0; |
698 | size_t i; | |
699 | ||
700 | for (i = 0; i < n_pvconns; i++) { | |
701 | pvconn_close(pvconns[i]); | |
702 | } | |
703 | free(pvconns); | |
704 | ||
81e2083f | 705 | pvconns = xmalloc(sset_count(sset) * sizeof *pvconns); |
19a87e36 | 706 | n_pvconns = 0; |
81e2083f | 707 | SSET_FOR_EACH (name, sset) { |
19a87e36 BP |
708 | struct pvconn *pvconn; |
709 | int error; | |
710 | ||
ef8a3d14 | 711 | error = pvconn_open(name, &pvconn, 0); |
19a87e36 BP |
712 | if (!error) { |
713 | pvconns[n_pvconns++] = pvconn; | |
714 | } else { | |
715 | VLOG_ERR("failed to listen on %s: %s", name, strerror(error)); | |
716 | if (!retval) { | |
717 | retval = error; | |
718 | } | |
719 | } | |
720 | } | |
721 | ||
722 | *pvconnsp = pvconns; | |
723 | *n_pvconnsp = n_pvconns; | |
724 | ||
725 | return retval; | |
726 | } | |
727 | ||
728 | /* Returns a "preference level" for snooping 'ofconn'. A higher return value | |
729 | * means that 'ofconn' is more interesting for monitoring than a lower return | |
730 | * value. */ | |
731 | static int | |
732 | snoop_preference(const struct ofconn *ofconn) | |
733 | { | |
734 | switch (ofconn->role) { | |
735 | case NX_ROLE_MASTER: | |
736 | return 3; | |
737 | case NX_ROLE_OTHER: | |
738 | return 2; | |
739 | case NX_ROLE_SLAVE: | |
740 | return 1; | |
741 | default: | |
742 | /* Shouldn't happen. */ | |
743 | return 0; | |
744 | } | |
745 | } | |
746 | ||
747 | /* One of 'mgr''s "snoop" pvconns has accepted a new connection on 'vconn'. | |
748 | * Connects this vconn to a controller. */ | |
749 | static void | |
750 | add_snooper(struct connmgr *mgr, struct vconn *vconn) | |
751 | { | |
752 | struct ofconn *ofconn, *best; | |
753 | ||
754 | /* Pick a controller for monitoring. */ | |
755 | best = NULL; | |
756 | LIST_FOR_EACH (ofconn, node, &mgr->all_conns) { | |
757 | if (ofconn->type == OFCONN_PRIMARY | |
758 | && (!best || snoop_preference(ofconn) > snoop_preference(best))) { | |
759 | best = ofconn; | |
760 | } | |
761 | } | |
762 | ||
763 | if (best) { | |
764 | rconn_add_monitor(best->rconn, vconn); | |
765 | } else { | |
766 | VLOG_INFO_RL(&rl, "no controller connection to snoop"); | |
767 | vconn_close(vconn); | |
768 | } | |
769 | } | |
770 | \f | |
771 | /* Public ofconn functions. */ | |
772 | ||
773 | /* Returns the connection type, either OFCONN_PRIMARY or OFCONN_SERVICE. */ | |
774 | enum ofconn_type | |
775 | ofconn_get_type(const struct ofconn *ofconn) | |
776 | { | |
777 | return ofconn->type; | |
778 | } | |
779 | ||
780 | /* Returns the role configured for 'ofconn'. | |
781 | * | |
782 | * The default role, if no other role has been set, is NX_ROLE_OTHER. */ | |
783 | enum nx_role | |
784 | ofconn_get_role(const struct ofconn *ofconn) | |
785 | { | |
786 | return ofconn->role; | |
787 | } | |
788 | ||
789 | /* Changes 'ofconn''s role to 'role'. If 'role' is NX_ROLE_MASTER then any | |
790 | * existing master is demoted to a slave. */ | |
791 | void | |
792 | ofconn_set_role(struct ofconn *ofconn, enum nx_role role) | |
793 | { | |
794 | if (role == NX_ROLE_MASTER) { | |
795 | struct ofconn *other; | |
796 | ||
797 | HMAP_FOR_EACH (other, hmap_node, &ofconn->connmgr->controllers) { | |
798 | if (other->role == NX_ROLE_MASTER) { | |
799 | other->role = NX_ROLE_SLAVE; | |
800 | } | |
801 | } | |
802 | } | |
803 | ofconn->role = role; | |
804 | } | |
805 | ||
f0fd1a17 | 806 | void |
80d5aefd | 807 | ofconn_set_invalid_ttl_to_controller(struct ofconn *ofconn, bool enable) |
f0fd1a17 | 808 | { |
80d5aefd BP |
809 | uint32_t bit = 1u << OFPR_INVALID_TTL; |
810 | if (enable) { | |
811 | ofconn->master_async_config[OAM_PACKET_IN] |= bit; | |
812 | } else { | |
813 | ofconn->master_async_config[OAM_PACKET_IN] &= ~bit; | |
814 | } | |
f0fd1a17 PS |
815 | } |
816 | ||
817 | bool | |
818 | ofconn_get_invalid_ttl_to_controller(struct ofconn *ofconn) | |
819 | { | |
80d5aefd BP |
820 | uint32_t bit = 1u << OFPR_INVALID_TTL; |
821 | return (ofconn->master_async_config[OAM_PACKET_IN] & bit) != 0; | |
f0fd1a17 PS |
822 | } |
823 | ||
27527aa0 | 824 | /* Returns the currently configured protocol for 'ofconn', one of OFPUTIL_P_*. |
19a87e36 | 825 | * |
27527aa0 BP |
826 | * The default, if no other format has been set, is OFPUTIL_P_OPENFLOW10. */ |
827 | enum ofputil_protocol | |
828 | ofconn_get_protocol(struct ofconn *ofconn) | |
19a87e36 | 829 | { |
27527aa0 | 830 | return ofconn->protocol; |
19a87e36 BP |
831 | } |
832 | ||
27527aa0 BP |
833 | /* Sets the protocol for 'ofconn' to 'protocol' (one of OFPUTIL_P_*). |
834 | * | |
835 | * (This doesn't actually send anything to accomplish this. Presumably the | |
836 | * caller already did that.) */ | |
19a87e36 | 837 | void |
27527aa0 | 838 | ofconn_set_protocol(struct ofconn *ofconn, enum ofputil_protocol protocol) |
19a87e36 | 839 | { |
27527aa0 | 840 | ofconn->protocol = protocol; |
19a87e36 BP |
841 | } |
842 | ||
54834960 EJ |
843 | /* Returns the currently configured packet in format for 'ofconn', one of |
844 | * NXPIF_*. | |
845 | * | |
846 | * The default, if no other format has been set, is NXPIF_OPENFLOW10. */ | |
847 | enum nx_packet_in_format | |
848 | ofconn_get_packet_in_format(struct ofconn *ofconn) | |
849 | { | |
850 | return ofconn->packet_in_format; | |
851 | } | |
852 | ||
853 | /* Sets the packet in format for 'ofconn' to 'packet_in_format' (one of | |
854 | * NXPIF_*). */ | |
855 | void | |
856 | ofconn_set_packet_in_format(struct ofconn *ofconn, | |
857 | enum nx_packet_in_format packet_in_format) | |
858 | { | |
859 | ofconn->packet_in_format = packet_in_format; | |
860 | } | |
861 | ||
a7349929 BP |
862 | /* Sets the controller connection ID for 'ofconn' to 'controller_id'. |
863 | * | |
864 | * The connection controller ID is used for OFPP_CONTROLLER and | |
865 | * NXAST_CONTROLLER actions. See "struct nx_action_controller" for details. */ | |
866 | void | |
867 | ofconn_set_controller_id(struct ofconn *ofconn, uint16_t controller_id) | |
868 | { | |
869 | ofconn->controller_id = controller_id; | |
870 | } | |
871 | ||
19a87e36 BP |
872 | /* Returns the default miss send length for 'ofconn'. */ |
873 | int | |
874 | ofconn_get_miss_send_len(const struct ofconn *ofconn) | |
875 | { | |
876 | return ofconn->miss_send_len; | |
877 | } | |
878 | ||
879 | /* Sets the default miss send length for 'ofconn' to 'miss_send_len'. */ | |
880 | void | |
881 | ofconn_set_miss_send_len(struct ofconn *ofconn, int miss_send_len) | |
882 | { | |
883 | ofconn->miss_send_len = miss_send_len; | |
884 | } | |
885 | ||
80d5aefd BP |
886 | void |
887 | ofconn_set_async_config(struct ofconn *ofconn, | |
888 | const uint32_t master_masks[OAM_N_TYPES], | |
889 | const uint32_t slave_masks[OAM_N_TYPES]) | |
890 | { | |
891 | size_t size = sizeof ofconn->master_async_config; | |
892 | memcpy(ofconn->master_async_config, master_masks, size); | |
893 | memcpy(ofconn->slave_async_config, slave_masks, size); | |
894 | } | |
895 | ||
19a87e36 BP |
896 | /* Sends 'msg' on 'ofconn', accounting it as a reply. (If there is a |
897 | * sufficient number of OpenFlow replies in-flight on a single ofconn, then the | |
898 | * connmgr will stop accepting new OpenFlow requests on that ofconn until the | |
899 | * controller has accepted some of the replies.) */ | |
900 | void | |
901 | ofconn_send_reply(const struct ofconn *ofconn, struct ofpbuf *msg) | |
902 | { | |
903 | ofconn_send(ofconn, msg, ofconn->reply_counter); | |
904 | } | |
905 | ||
63f2140a BP |
906 | /* Sends each of the messages in list 'replies' on 'ofconn' in order, |
907 | * accounting them as replies. */ | |
908 | void | |
909 | ofconn_send_replies(const struct ofconn *ofconn, struct list *replies) | |
910 | { | |
911 | struct ofpbuf *reply, *next; | |
912 | ||
913 | LIST_FOR_EACH_SAFE (reply, next, list_node, replies) { | |
914 | list_remove(&reply->list_node); | |
915 | ofconn_send_reply(ofconn, reply); | |
916 | } | |
917 | } | |
918 | ||
90bf1e07 | 919 | /* Sends 'error' on 'ofconn', as a reply to 'request'. Only at most the |
1be5ff75 BP |
920 | * first 64 bytes of 'request' are used. */ |
921 | void | |
922 | ofconn_send_error(const struct ofconn *ofconn, | |
90bf1e07 | 923 | const struct ofp_header *request, enum ofperr error) |
1be5ff75 | 924 | { |
90bf1e07 | 925 | struct ofpbuf *reply; |
76589937 | 926 | |
90bf1e07 BP |
927 | reply = ofperr_encode_reply(error, request); |
928 | if (reply) { | |
76589937 BP |
929 | static struct vlog_rate_limit err_rl = VLOG_RATE_LIMIT_INIT(10, 10); |
930 | ||
931 | if (!VLOG_DROP_INFO(&err_rl)) { | |
932 | const struct ofputil_msg_type *type; | |
933 | const char *type_name; | |
934 | size_t request_len; | |
76589937 BP |
935 | |
936 | request_len = ntohs(request->length); | |
937 | type_name = (!ofputil_decode_msg_type_partial(request, | |
938 | MIN(64, request_len), | |
939 | &type) | |
940 | ? ofputil_msg_type_name(type) | |
941 | : "invalid"); | |
942 | ||
76589937 | 943 | VLOG_INFO("%s: sending %s error reply to %s message", |
90bf1e07 BP |
944 | rconn_get_name(ofconn->rconn), ofperr_to_string(error), |
945 | type_name); | |
76589937 | 946 | } |
90bf1e07 | 947 | ofconn_send_reply(ofconn, reply); |
1be5ff75 BP |
948 | } |
949 | } | |
950 | ||
19a87e36 | 951 | /* Same as pktbuf_retrieve(), using the pktbuf owned by 'ofconn'. */ |
90bf1e07 | 952 | enum ofperr |
19a87e36 BP |
953 | ofconn_pktbuf_retrieve(struct ofconn *ofconn, uint32_t id, |
954 | struct ofpbuf **bufferp, uint16_t *in_port) | |
955 | { | |
956 | return pktbuf_retrieve(ofconn->pktbuf, id, bufferp, in_port); | |
957 | } | |
7ee20df1 BP |
958 | |
959 | /* Returns true if 'ofconn' has any pending opgroups. */ | |
960 | bool | |
961 | ofconn_has_pending_opgroups(const struct ofconn *ofconn) | |
962 | { | |
963 | return !list_is_empty(&ofconn->opgroups); | |
964 | } | |
965 | ||
7ee20df1 BP |
966 | /* Adds 'ofconn_node' to 'ofconn''s list of pending opgroups. |
967 | * | |
968 | * If 'ofconn' is destroyed or its connection drops, then 'ofconn' will remove | |
969 | * 'ofconn_node' from the list and re-initialize it with list_init(). The | |
970 | * client may, therefore, use list_is_empty(ofconn_node) to determine whether | |
971 | * 'ofconn_node' is still associated with an active ofconn. | |
972 | * | |
973 | * The client may also remove ofconn_node from the list itself, with | |
974 | * list_remove(). */ | |
975 | void | |
976 | ofconn_add_opgroup(struct ofconn *ofconn, struct list *ofconn_node) | |
977 | { | |
978 | list_push_back(&ofconn->opgroups, ofconn_node); | |
979 | } | |
19a87e36 BP |
980 | \f |
981 | /* Private ofconn functions. */ | |
982 | ||
983 | static const char * | |
984 | ofconn_get_target(const struct ofconn *ofconn) | |
985 | { | |
986 | return rconn_get_target(ofconn->rconn); | |
987 | } | |
988 | ||
989 | static struct ofconn * | |
9886b662 BP |
990 | ofconn_create(struct connmgr *mgr, struct rconn *rconn, enum ofconn_type type, |
991 | bool enable_async_msgs) | |
19a87e36 | 992 | { |
c4b31872 BP |
993 | struct ofconn *ofconn; |
994 | ||
995 | ofconn = xzalloc(sizeof *ofconn); | |
19a87e36 BP |
996 | ofconn->connmgr = mgr; |
997 | list_push_back(&mgr->all_conns, &ofconn->node); | |
998 | ofconn->rconn = rconn; | |
999 | ofconn->type = type; | |
9886b662 | 1000 | ofconn->enable_async_msgs = enable_async_msgs; |
c4b31872 | 1001 | |
7ee20df1 | 1002 | list_init(&ofconn->opgroups); |
c4b31872 BP |
1003 | |
1004 | ofconn_flush(ofconn); | |
1005 | ||
19a87e36 BP |
1006 | return ofconn; |
1007 | } | |
1008 | ||
c4b31872 BP |
1009 | /* Clears all of the state in 'ofconn' that should not persist from one |
1010 | * connection to the next. */ | |
7ee20df1 BP |
1011 | static void |
1012 | ofconn_flush(struct ofconn *ofconn) | |
1013 | { | |
c4b31872 BP |
1014 | int i; |
1015 | ||
1016 | ofconn->role = NX_ROLE_OTHER; | |
27527aa0 | 1017 | ofconn->protocol = OFPUTIL_P_OF10; |
c4b31872 | 1018 | ofconn->packet_in_format = NXPIF_OPENFLOW10; |
c4b31872 BP |
1019 | |
1020 | /* Disassociate 'ofconn' from all of the ofopgroups that it initiated that | |
1021 | * have not yet completed. (Those ofopgroups will still run to completion | |
1022 | * in the usual way, but any errors that they run into will not be reported | |
1023 | * on any OpenFlow channel.) | |
1024 | * | |
1025 | * Also discard any blocked operation on 'ofconn'. */ | |
7ee20df1 BP |
1026 | while (!list_is_empty(&ofconn->opgroups)) { |
1027 | list_init(list_pop_front(&ofconn->opgroups)); | |
1028 | } | |
1029 | ofpbuf_delete(ofconn->blocked); | |
1030 | ofconn->blocked = NULL; | |
c4b31872 BP |
1031 | |
1032 | rconn_packet_counter_destroy(ofconn->packet_in_counter); | |
1033 | ofconn->packet_in_counter = rconn_packet_counter_create(); | |
1034 | for (i = 0; i < N_SCHEDULERS; i++) { | |
1035 | if (ofconn->schedulers[i]) { | |
1036 | int rate, burst; | |
1037 | ||
1038 | pinsched_get_limits(ofconn->schedulers[i], &rate, &burst); | |
1039 | pinsched_destroy(ofconn->schedulers[i]); | |
1040 | ofconn->schedulers[i] = pinsched_create(rate, burst); | |
1041 | } | |
1042 | } | |
1043 | if (ofconn->pktbuf) { | |
1044 | pktbuf_destroy(ofconn->pktbuf); | |
1045 | ofconn->pktbuf = pktbuf_create(); | |
1046 | } | |
1047 | ofconn->miss_send_len = (ofconn->type == OFCONN_PRIMARY | |
1048 | ? OFP_DEFAULT_MISS_SEND_LEN | |
1049 | : 0); | |
a7349929 | 1050 | ofconn->controller_id = 0; |
c4b31872 BP |
1051 | |
1052 | rconn_packet_counter_destroy(ofconn->reply_counter); | |
1053 | ofconn->reply_counter = rconn_packet_counter_create(); | |
80d5aefd | 1054 | |
9886b662 BP |
1055 | if (ofconn->enable_async_msgs) { |
1056 | uint32_t *master = ofconn->master_async_config; | |
1057 | uint32_t *slave = ofconn->slave_async_config; | |
1058 | ||
1059 | /* "master" and "other" roles get all asynchronous messages by default, | |
1060 | * except that the controller needs to enable nonstandard "packet-in" | |
1061 | * reasons itself. */ | |
1062 | master[OAM_PACKET_IN] = (1u << OFPR_NO_MATCH) | (1u << OFPR_ACTION); | |
1063 | master[OAM_PORT_STATUS] = ((1u << OFPPR_ADD) | |
1064 | | (1u << OFPPR_DELETE) | |
1065 | | (1u << OFPPR_MODIFY)); | |
1066 | master[OAM_FLOW_REMOVED] = ((1u << OFPRR_IDLE_TIMEOUT) | |
1067 | | (1u << OFPRR_HARD_TIMEOUT) | |
1068 | | (1u << OFPRR_DELETE)); | |
1069 | ||
1070 | /* "slave" role gets port status updates by default. */ | |
1071 | slave[OAM_PACKET_IN] = 0; | |
1072 | slave[OAM_PORT_STATUS] = ((1u << OFPPR_ADD) | |
1073 | | (1u << OFPPR_DELETE) | |
1074 | | (1u << OFPPR_MODIFY)); | |
1075 | slave[OAM_FLOW_REMOVED] = 0; | |
1076 | } else { | |
1077 | memset(ofconn->master_async_config, 0, | |
1078 | sizeof ofconn->master_async_config); | |
1079 | memset(ofconn->slave_async_config, 0, | |
1080 | sizeof ofconn->slave_async_config); | |
1081 | } | |
7ee20df1 BP |
1082 | } |
1083 | ||
19a87e36 BP |
1084 | static void |
1085 | ofconn_destroy(struct ofconn *ofconn) | |
1086 | { | |
7ee20df1 BP |
1087 | ofconn_flush(ofconn); |
1088 | ||
19a87e36 BP |
1089 | if (ofconn->type == OFCONN_PRIMARY) { |
1090 | hmap_remove(&ofconn->connmgr->controllers, &ofconn->hmap_node); | |
1091 | } | |
1092 | ||
1093 | list_remove(&ofconn->node); | |
1094 | rconn_destroy(ofconn->rconn); | |
1095 | rconn_packet_counter_destroy(ofconn->packet_in_counter); | |
1096 | rconn_packet_counter_destroy(ofconn->reply_counter); | |
1097 | pktbuf_destroy(ofconn->pktbuf); | |
1098 | free(ofconn); | |
1099 | } | |
1100 | ||
1101 | /* Reconfigures 'ofconn' to match 'c'. 'ofconn' and 'c' must have the same | |
1102 | * target. */ | |
1103 | static void | |
1104 | ofconn_reconfigure(struct ofconn *ofconn, const struct ofproto_controller *c) | |
1105 | { | |
1106 | int probe_interval; | |
1107 | ||
1108 | ofconn->band = c->band; | |
065825e9 | 1109 | ofconn->enable_async_msgs = c->enable_async_msgs; |
19a87e36 BP |
1110 | |
1111 | rconn_set_max_backoff(ofconn->rconn, c->max_backoff); | |
1112 | ||
1113 | probe_interval = c->probe_interval ? MAX(c->probe_interval, 5) : 0; | |
1114 | rconn_set_probe_interval(ofconn->rconn, probe_interval); | |
1115 | ||
1116 | ofconn_set_rate_limit(ofconn, c->rate_limit, c->burst_limit); | |
0442efd9 MM |
1117 | |
1118 | /* If dscp value changed reconnect. */ | |
1119 | if (c->dscp != rconn_get_dscp(ofconn->rconn)) { | |
1120 | rconn_set_dscp(ofconn->rconn, c->dscp); | |
1121 | rconn_reconnect(ofconn->rconn); | |
1122 | } | |
19a87e36 BP |
1123 | } |
1124 | ||
7ee20df1 BP |
1125 | /* Returns true if it makes sense for 'ofconn' to receive and process OpenFlow |
1126 | * messages. */ | |
1127 | static bool | |
1128 | ofconn_may_recv(const struct ofconn *ofconn) | |
1129 | { | |
1130 | int count = rconn_packet_counter_read (ofconn->reply_counter); | |
1131 | return (!ofconn->blocked || ofconn->retry) && count < OFCONN_REPLY_MAX; | |
1132 | } | |
1133 | ||
19a87e36 BP |
1134 | static void |
1135 | ofconn_run(struct ofconn *ofconn, | |
7ee20df1 | 1136 | bool (*handle_openflow)(struct ofconn *, struct ofpbuf *ofp_msg)) |
19a87e36 BP |
1137 | { |
1138 | struct connmgr *mgr = ofconn->connmgr; | |
19a87e36 BP |
1139 | size_t i; |
1140 | ||
1141 | for (i = 0; i < N_SCHEDULERS; i++) { | |
1142 | pinsched_run(ofconn->schedulers[i], do_send_packet_in, ofconn); | |
1143 | } | |
1144 | ||
1145 | rconn_run(ofconn->rconn); | |
1146 | ||
7ee20df1 BP |
1147 | if (handle_openflow) { |
1148 | /* Limit the number of iterations to avoid starving other tasks. */ | |
1149 | for (i = 0; i < 50 && ofconn_may_recv(ofconn); i++) { | |
1150 | struct ofpbuf *of_msg; | |
1151 | ||
1152 | of_msg = (ofconn->blocked | |
1153 | ? ofconn->blocked | |
1154 | : rconn_recv(ofconn->rconn)); | |
19a87e36 BP |
1155 | if (!of_msg) { |
1156 | break; | |
1157 | } | |
1158 | if (mgr->fail_open) { | |
1159 | fail_open_maybe_recover(mgr->fail_open); | |
1160 | } | |
7ee20df1 BP |
1161 | |
1162 | if (handle_openflow(ofconn, of_msg)) { | |
1163 | ofpbuf_delete(of_msg); | |
1164 | ofconn->blocked = NULL; | |
1165 | } else { | |
1166 | ofconn->blocked = of_msg; | |
1167 | ofconn->retry = false; | |
1168 | } | |
19a87e36 BP |
1169 | } |
1170 | } | |
1171 | ||
1172 | if (!rconn_is_alive(ofconn->rconn)) { | |
1173 | ofconn_destroy(ofconn); | |
7ee20df1 BP |
1174 | } else if (!rconn_is_connected(ofconn->rconn)) { |
1175 | ofconn_flush(ofconn); | |
19a87e36 BP |
1176 | } |
1177 | } | |
1178 | ||
1179 | static void | |
7ee20df1 | 1180 | ofconn_wait(struct ofconn *ofconn, bool handling_openflow) |
19a87e36 BP |
1181 | { |
1182 | int i; | |
1183 | ||
1184 | for (i = 0; i < N_SCHEDULERS; i++) { | |
1185 | pinsched_wait(ofconn->schedulers[i]); | |
1186 | } | |
1187 | rconn_run_wait(ofconn->rconn); | |
7ee20df1 | 1188 | if (handling_openflow && ofconn_may_recv(ofconn)) { |
19a87e36 | 1189 | rconn_recv_wait(ofconn->rconn); |
19a87e36 BP |
1190 | } |
1191 | } | |
1192 | ||
80d5aefd BP |
1193 | /* Returns true if 'ofconn' should receive asynchronous messages of the given |
1194 | * OAM_* 'type' and 'reason', which should be a OFPR_* value for OAM_PACKET_IN, | |
1195 | * a OFPPR_* value for OAM_PORT_STATUS, or an OFPRR_* value for | |
1196 | * OAM_FLOW_REMOVED. Returns false if the message should not be sent on | |
1197 | * 'ofconn'. */ | |
19a87e36 | 1198 | static bool |
80d5aefd BP |
1199 | ofconn_receives_async_msg(const struct ofconn *ofconn, |
1200 | enum ofconn_async_msg_type type, | |
1201 | unsigned int reason) | |
19a87e36 | 1202 | { |
80d5aefd BP |
1203 | const uint32_t *async_config; |
1204 | ||
1205 | assert(reason < 32); | |
1206 | assert((unsigned int) type < OAM_N_TYPES); | |
19a87e36 | 1207 | |
f0fd1a17 PS |
1208 | if (!rconn_is_connected(ofconn->rconn)) { |
1209 | return false; | |
f0fd1a17 | 1210 | } |
f0fd1a17 | 1211 | |
80d5aefd BP |
1212 | /* Keep the following code in sync with the documentation in the |
1213 | * "Asynchronous Messages" section in DESIGN. */ | |
1214 | ||
1215 | if (ofconn->type == OFCONN_SERVICE && !ofconn->miss_send_len) { | |
1216 | /* Service connections don't get asynchronous messages unless they have | |
1217 | * explicitly asked for them by setting a nonzero miss send length. */ | |
f0fd1a17 | 1218 | return false; |
f0fd1a17 | 1219 | } |
80d5aefd BP |
1220 | |
1221 | async_config = (ofconn->role == NX_ROLE_SLAVE | |
1222 | ? ofconn->slave_async_config | |
1223 | : ofconn->master_async_config); | |
1224 | if (!(async_config[type] & (1u << reason))) { | |
1225 | return false; | |
1226 | } | |
1227 | ||
1228 | return true; | |
f0fd1a17 PS |
1229 | } |
1230 | ||
19a87e36 BP |
1231 | /* Returns a human-readable name for an OpenFlow connection between 'mgr' and |
1232 | * 'target', suitable for use in log messages for identifying the connection. | |
1233 | * | |
1234 | * The name is dynamically allocated. The caller should free it (with free()) | |
1235 | * when it is no longer needed. */ | |
1236 | static char * | |
1237 | ofconn_make_name(const struct connmgr *mgr, const char *target) | |
1238 | { | |
1239 | return xasprintf("%s<->%s", mgr->name, target); | |
1240 | } | |
1241 | ||
1242 | static void | |
1243 | ofconn_set_rate_limit(struct ofconn *ofconn, int rate, int burst) | |
1244 | { | |
1245 | int i; | |
1246 | ||
1247 | for (i = 0; i < N_SCHEDULERS; i++) { | |
1248 | struct pinsched **s = &ofconn->schedulers[i]; | |
1249 | ||
1250 | if (rate > 0) { | |
1251 | if (!*s) { | |
1252 | *s = pinsched_create(rate, burst); | |
1253 | } else { | |
1254 | pinsched_set_limits(*s, rate, burst); | |
1255 | } | |
1256 | } else { | |
1257 | pinsched_destroy(*s); | |
1258 | *s = NULL; | |
1259 | } | |
1260 | } | |
1261 | } | |
1262 | ||
1263 | static void | |
1264 | ofconn_send(const struct ofconn *ofconn, struct ofpbuf *msg, | |
1265 | struct rconn_packet_counter *counter) | |
1266 | { | |
1267 | update_openflow_length(msg); | |
acb9da40 | 1268 | rconn_send(ofconn->rconn, msg, counter); |
19a87e36 BP |
1269 | } |
1270 | \f | |
1271 | /* Sending asynchronous messages. */ | |
1272 | ||
d8653c38 | 1273 | static void schedule_packet_in(struct ofconn *, struct ofputil_packet_in); |
19a87e36 BP |
1274 | |
1275 | /* Sends an OFPT_PORT_STATUS message with 'opp' and 'reason' to appropriate | |
9cfcdadf | 1276 | * controllers managed by 'mgr'. */ |
19a87e36 | 1277 | void |
9e1fd49b BP |
1278 | connmgr_send_port_status(struct connmgr *mgr, |
1279 | const struct ofputil_phy_port *pp, uint8_t reason) | |
19a87e36 BP |
1280 | { |
1281 | /* XXX Should limit the number of queued port status change messages. */ | |
9e1fd49b | 1282 | struct ofputil_port_status ps; |
19a87e36 BP |
1283 | struct ofconn *ofconn; |
1284 | ||
9e1fd49b BP |
1285 | ps.reason = reason; |
1286 | ps.desc = *pp; | |
19a87e36 | 1287 | LIST_FOR_EACH (ofconn, node, &mgr->all_conns) { |
80d5aefd | 1288 | if (ofconn_receives_async_msg(ofconn, OAM_PORT_STATUS, reason)) { |
9e1fd49b | 1289 | struct ofpbuf *msg; |
80d5aefd | 1290 | |
9e1fd49b BP |
1291 | msg = ofputil_encode_port_status(&ps, ofconn->protocol); |
1292 | ofconn_send(ofconn, msg, NULL); | |
19a87e36 | 1293 | } |
19a87e36 BP |
1294 | } |
1295 | } | |
1296 | ||
1297 | /* Sends an OFPT_FLOW_REMOVED or NXT_FLOW_REMOVED message based on 'fr' to | |
1298 | * appropriate controllers managed by 'mgr'. */ | |
1299 | void | |
1300 | connmgr_send_flow_removed(struct connmgr *mgr, | |
1301 | const struct ofputil_flow_removed *fr) | |
1302 | { | |
1303 | struct ofconn *ofconn; | |
1304 | ||
1305 | LIST_FOR_EACH (ofconn, node, &mgr->all_conns) { | |
80d5aefd BP |
1306 | if (ofconn_receives_async_msg(ofconn, OAM_FLOW_REMOVED, fr->reason)) { |
1307 | struct ofpbuf *msg; | |
1308 | ||
1309 | /* Account flow expirations as replies to OpenFlow requests. That | |
1310 | * works because preventing OpenFlow requests from being processed | |
1311 | * also prevents new flows from being added (and expiring). (It | |
1312 | * also prevents processing OpenFlow requests that would not add | |
1313 | * new flows, so it is imperfect.) */ | |
27527aa0 | 1314 | msg = ofputil_encode_flow_removed(fr, ofconn->protocol); |
80d5aefd | 1315 | ofconn_send_reply(ofconn, msg); |
19a87e36 | 1316 | } |
19a87e36 BP |
1317 | } |
1318 | } | |
1319 | ||
78bd1cd0 | 1320 | /* Given 'pin', sends an OFPT_PACKET_IN message to each OpenFlow controller as |
2ed1202f BP |
1321 | * necessary according to their individual configurations. |
1322 | * | |
1323 | * The caller doesn't need to fill in pin->buffer_id or pin->total_len. */ | |
19a87e36 | 1324 | void |
78bd1cd0 | 1325 | connmgr_send_packet_in(struct connmgr *mgr, |
d8653c38 | 1326 | const struct ofputil_packet_in *pin) |
19a87e36 | 1327 | { |
29ebe880 | 1328 | struct ofconn *ofconn; |
19a87e36 | 1329 | |
19a87e36 | 1330 | LIST_FOR_EACH (ofconn, node, &mgr->all_conns) { |
a7349929 BP |
1331 | if (ofconn_receives_async_msg(ofconn, OAM_PACKET_IN, pin->reason) |
1332 | && ofconn->controller_id == pin->controller_id) { | |
d8653c38 | 1333 | schedule_packet_in(ofconn, *pin); |
19a87e36 BP |
1334 | } |
1335 | } | |
19a87e36 BP |
1336 | } |
1337 | ||
1338 | /* pinsched callback for sending 'ofp_packet_in' on 'ofconn'. */ | |
1339 | static void | |
1340 | do_send_packet_in(struct ofpbuf *ofp_packet_in, void *ofconn_) | |
1341 | { | |
1342 | struct ofconn *ofconn = ofconn_; | |
1343 | ||
1344 | rconn_send_with_limit(ofconn->rconn, ofp_packet_in, | |
1345 | ofconn->packet_in_counter, 100); | |
1346 | } | |
1347 | ||
d8653c38 BP |
1348 | /* Takes 'pin', composes an OpenFlow packet-in message from it, and passes it |
1349 | * to 'ofconn''s packet scheduler for sending. */ | |
19a87e36 | 1350 | static void |
d8653c38 | 1351 | schedule_packet_in(struct ofconn *ofconn, struct ofputil_packet_in pin) |
19a87e36 BP |
1352 | { |
1353 | struct connmgr *mgr = ofconn->connmgr; | |
19a87e36 | 1354 | |
2ed1202f BP |
1355 | pin.total_len = pin.packet_len; |
1356 | ||
19a87e36 | 1357 | /* Get OpenFlow buffer_id. */ |
78bd1cd0 | 1358 | if (pin.reason == OFPR_ACTION) { |
19a87e36 BP |
1359 | pin.buffer_id = UINT32_MAX; |
1360 | } else if (mgr->fail_open && fail_open_is_active(mgr->fail_open)) { | |
1361 | pin.buffer_id = pktbuf_get_null(); | |
1362 | } else if (!ofconn->pktbuf) { | |
1363 | pin.buffer_id = UINT32_MAX; | |
1364 | } else { | |
3e3252fa | 1365 | pin.buffer_id = pktbuf_save(ofconn->pktbuf, pin.packet, pin.packet_len, |
d8653c38 | 1366 | pin.fmd.in_port); |
19a87e36 BP |
1367 | } |
1368 | ||
1369 | /* Figure out how much of the packet to send. */ | |
78bd1cd0 | 1370 | if (pin.reason == OFPR_NO_MATCH) { |
3e3252fa | 1371 | pin.send_len = pin.packet_len; |
78bd1cd0 BP |
1372 | } else { |
1373 | /* Caller should have initialized 'send_len' to 'max_len' specified in | |
1374 | * struct ofp_action_output. */ | |
1375 | } | |
19a87e36 BP |
1376 | if (pin.buffer_id != UINT32_MAX) { |
1377 | pin.send_len = MIN(pin.send_len, ofconn->miss_send_len); | |
1378 | } | |
19a87e36 BP |
1379 | |
1380 | /* Make OFPT_PACKET_IN and hand over to packet scheduler. It might | |
1381 | * immediately call into do_send_packet_in() or it might buffer it for a | |
1382 | * while (until a later call to pinsched_run()). */ | |
78bd1cd0 | 1383 | pinsched_send(ofconn->schedulers[pin.reason == OFPR_NO_MATCH ? 0 : 1], |
d8653c38 | 1384 | pin.fmd.in_port, |
54834960 | 1385 | ofputil_encode_packet_in(&pin, ofconn->packet_in_format), |
19a87e36 BP |
1386 | do_send_packet_in, ofconn); |
1387 | } | |
1388 | \f | |
1389 | /* Fail-open settings. */ | |
1390 | ||
1391 | /* Returns the failure handling mode (OFPROTO_FAIL_SECURE or | |
1392 | * OFPROTO_FAIL_STANDALONE) for 'mgr'. */ | |
1393 | enum ofproto_fail_mode | |
1394 | connmgr_get_fail_mode(const struct connmgr *mgr) | |
1395 | { | |
1396 | return mgr->fail_mode; | |
1397 | } | |
1398 | ||
1399 | /* Sets the failure handling mode for 'mgr' to 'fail_mode' (either | |
1400 | * OFPROTO_FAIL_SECURE or OFPROTO_FAIL_STANDALONE). */ | |
1401 | void | |
1402 | connmgr_set_fail_mode(struct connmgr *mgr, enum ofproto_fail_mode fail_mode) | |
1403 | { | |
08fd19f0 BP |
1404 | if (mgr->fail_mode != fail_mode) { |
1405 | mgr->fail_mode = fail_mode; | |
1406 | update_fail_open(mgr); | |
1407 | if (!connmgr_has_controllers(mgr)) { | |
1408 | ofproto_flush_flows(mgr->ofproto); | |
1409 | } | |
1410 | } | |
19a87e36 BP |
1411 | } |
1412 | \f | |
1413 | /* Fail-open implementation. */ | |
1414 | ||
1415 | /* Returns the longest probe interval among the primary controllers configured | |
1416 | * on 'mgr'. Returns 0 if there are no primary controllers. */ | |
1417 | int | |
1418 | connmgr_get_max_probe_interval(const struct connmgr *mgr) | |
1419 | { | |
1420 | const struct ofconn *ofconn; | |
1421 | int max_probe_interval; | |
1422 | ||
1423 | max_probe_interval = 0; | |
1424 | HMAP_FOR_EACH (ofconn, hmap_node, &mgr->controllers) { | |
1425 | int probe_interval = rconn_get_probe_interval(ofconn->rconn); | |
1426 | max_probe_interval = MAX(max_probe_interval, probe_interval); | |
1427 | } | |
1428 | return max_probe_interval; | |
1429 | } | |
1430 | ||
1431 | /* Returns the number of seconds for which all of 'mgr's primary controllers | |
1432 | * have been disconnected. Returns 0 if 'mgr' has no primary controllers. */ | |
1433 | int | |
1434 | connmgr_failure_duration(const struct connmgr *mgr) | |
1435 | { | |
1436 | const struct ofconn *ofconn; | |
1437 | int min_failure_duration; | |
1438 | ||
1439 | if (!connmgr_has_controllers(mgr)) { | |
1440 | return 0; | |
1441 | } | |
1442 | ||
1443 | min_failure_duration = INT_MAX; | |
1444 | HMAP_FOR_EACH (ofconn, hmap_node, &mgr->controllers) { | |
1445 | int failure_duration = rconn_failure_duration(ofconn->rconn); | |
1446 | min_failure_duration = MIN(min_failure_duration, failure_duration); | |
1447 | } | |
1448 | return min_failure_duration; | |
1449 | } | |
1450 | ||
1451 | /* Returns true if at least one primary controller is connected (regardless of | |
1452 | * whether those controllers are believed to have authenticated and accepted | |
1453 | * this switch), false if none of them are connected. */ | |
1454 | bool | |
1455 | connmgr_is_any_controller_connected(const struct connmgr *mgr) | |
1456 | { | |
1457 | const struct ofconn *ofconn; | |
1458 | ||
1459 | HMAP_FOR_EACH (ofconn, hmap_node, &mgr->controllers) { | |
1460 | if (rconn_is_connected(ofconn->rconn)) { | |
1461 | return true; | |
1462 | } | |
1463 | } | |
1464 | return false; | |
1465 | } | |
1466 | ||
1467 | /* Returns true if at least one primary controller is believed to have | |
1468 | * authenticated and accepted this switch, false otherwise. */ | |
1469 | bool | |
1470 | connmgr_is_any_controller_admitted(const struct connmgr *mgr) | |
1471 | { | |
1472 | const struct ofconn *ofconn; | |
1473 | ||
1474 | HMAP_FOR_EACH (ofconn, hmap_node, &mgr->controllers) { | |
1475 | if (rconn_is_admitted(ofconn->rconn)) { | |
1476 | return true; | |
1477 | } | |
1478 | } | |
1479 | return false; | |
1480 | } | |
19a87e36 BP |
1481 | \f |
1482 | /* In-band configuration. */ | |
1483 | ||
1484 | static bool any_extras_changed(const struct connmgr *, | |
1485 | const struct sockaddr_in *extras, size_t n); | |
1486 | ||
1487 | /* Sets the 'n' TCP port addresses in 'extras' as ones to which 'mgr''s | |
1488 | * in-band control should guarantee access, in the same way that in-band | |
1489 | * control guarantees access to OpenFlow controllers. */ | |
1490 | void | |
1491 | connmgr_set_extra_in_band_remotes(struct connmgr *mgr, | |
1492 | const struct sockaddr_in *extras, size_t n) | |
1493 | { | |
1494 | if (!any_extras_changed(mgr, extras, n)) { | |
1495 | return; | |
1496 | } | |
1497 | ||
1498 | free(mgr->extra_in_band_remotes); | |
1499 | mgr->n_extra_remotes = n; | |
1500 | mgr->extra_in_band_remotes = xmemdup(extras, n * sizeof *extras); | |
1501 | ||
1502 | update_in_band_remotes(mgr); | |
1503 | } | |
1504 | ||
1505 | /* Sets the OpenFlow queue used by flows set up by in-band control on | |
1506 | * 'mgr' to 'queue_id'. If 'queue_id' is negative, then in-band control | |
1507 | * flows will use the default queue. */ | |
1508 | void | |
1509 | connmgr_set_in_band_queue(struct connmgr *mgr, int queue_id) | |
1510 | { | |
1511 | if (queue_id != mgr->in_band_queue) { | |
1512 | mgr->in_band_queue = queue_id; | |
1513 | update_in_band_remotes(mgr); | |
1514 | } | |
1515 | } | |
1516 | ||
1517 | static bool | |
1518 | any_extras_changed(const struct connmgr *mgr, | |
1519 | const struct sockaddr_in *extras, size_t n) | |
1520 | { | |
1521 | size_t i; | |
1522 | ||
1523 | if (n != mgr->n_extra_remotes) { | |
1524 | return true; | |
1525 | } | |
1526 | ||
1527 | for (i = 0; i < n; i++) { | |
1528 | const struct sockaddr_in *old = &mgr->extra_in_band_remotes[i]; | |
1529 | const struct sockaddr_in *new = &extras[i]; | |
1530 | ||
1531 | if (old->sin_addr.s_addr != new->sin_addr.s_addr || | |
1532 | old->sin_port != new->sin_port) { | |
1533 | return true; | |
1534 | } | |
1535 | } | |
1536 | ||
1537 | return false; | |
1538 | } | |
1539 | \f | |
1540 | /* In-band implementation. */ | |
1541 | ||
1542 | bool | |
1543 | connmgr_msg_in_hook(struct connmgr *mgr, const struct flow *flow, | |
1544 | const struct ofpbuf *packet) | |
1545 | { | |
1546 | return mgr->in_band && in_band_msg_in_hook(mgr->in_band, flow, packet); | |
1547 | } | |
1548 | ||
1549 | bool | |
1550 | connmgr_may_set_up_flow(struct connmgr *mgr, const struct flow *flow, | |
1551 | const struct nlattr *odp_actions, | |
1552 | size_t actions_len) | |
1553 | { | |
1554 | return !mgr->in_band || in_band_rule_check(flow, odp_actions, actions_len); | |
1555 | } | |
1556 | \f | |
1557 | /* Fail-open and in-band implementation. */ | |
1558 | ||
1559 | /* Called by 'ofproto' after all flows have been flushed, to allow fail-open | |
7ee20df1 BP |
1560 | * and standalone mode to re-create their flows. |
1561 | * | |
1562 | * In-band control has more sophisticated code that manages flows itself. */ | |
19a87e36 BP |
1563 | void |
1564 | connmgr_flushed(struct connmgr *mgr) | |
1565 | { | |
19a87e36 BP |
1566 | if (mgr->fail_open) { |
1567 | fail_open_flushed(mgr->fail_open); | |
1568 | } | |
08fd19f0 BP |
1569 | |
1570 | /* If there are no controllers and we're in standalone mode, set up a flow | |
1571 | * that matches every packet and directs them to OFPP_NORMAL (which goes to | |
1572 | * us). Otherwise, the switch is in secure mode and we won't pass any | |
1573 | * traffic until a controller has been defined and it tells us to do so. */ | |
1574 | if (!connmgr_has_controllers(mgr) | |
1575 | && mgr->fail_mode == OFPROTO_FAIL_STANDALONE) { | |
1576 | union ofp_action action; | |
1577 | struct cls_rule rule; | |
1578 | ||
1579 | memset(&action, 0, sizeof action); | |
08f94c0e | 1580 | action.type = htons(OFPAT10_OUTPUT); |
08fd19f0 BP |
1581 | action.output.len = htons(sizeof action); |
1582 | action.output.port = htons(OFPP_NORMAL); | |
1583 | cls_rule_init_catchall(&rule, 0); | |
1584 | ofproto_add_flow(mgr->ofproto, &rule, &action, 1); | |
1585 | } | |
19a87e36 BP |
1586 | } |
1587 | \f | |
1588 | /* Creates a new ofservice for 'target' in 'mgr'. Returns 0 if successful, | |
1589 | * otherwise a positive errno value. | |
1590 | * | |
1591 | * ofservice_reconfigure() must be called to fully configure the new | |
1592 | * ofservice. */ | |
1593 | static int | |
f125905c | 1594 | ofservice_create(struct connmgr *mgr, const char *target, uint8_t dscp) |
19a87e36 BP |
1595 | { |
1596 | struct ofservice *ofservice; | |
1597 | struct pvconn *pvconn; | |
1598 | int error; | |
1599 | ||
f125905c | 1600 | error = pvconn_open(target, &pvconn, dscp); |
19a87e36 BP |
1601 | if (error) { |
1602 | return error; | |
1603 | } | |
1604 | ||
1605 | ofservice = xzalloc(sizeof *ofservice); | |
1606 | hmap_insert(&mgr->services, &ofservice->node, hash_string(target, 0)); | |
1607 | ofservice->pvconn = pvconn; | |
1608 | ||
1609 | return 0; | |
1610 | } | |
1611 | ||
1612 | static void | |
1613 | ofservice_destroy(struct connmgr *mgr, struct ofservice *ofservice) | |
1614 | { | |
1615 | hmap_remove(&mgr->services, &ofservice->node); | |
1616 | pvconn_close(ofservice->pvconn); | |
1617 | free(ofservice); | |
1618 | } | |
1619 | ||
1620 | static void | |
1621 | ofservice_reconfigure(struct ofservice *ofservice, | |
1622 | const struct ofproto_controller *c) | |
1623 | { | |
1624 | ofservice->probe_interval = c->probe_interval; | |
1625 | ofservice->rate_limit = c->rate_limit; | |
1626 | ofservice->burst_limit = c->burst_limit; | |
9886b662 | 1627 | ofservice->enable_async_msgs = c->enable_async_msgs; |
f125905c | 1628 | ofservice->dscp = c->dscp; |
19a87e36 BP |
1629 | } |
1630 | ||
1631 | /* Finds and returns the ofservice within 'mgr' that has the given | |
1632 | * 'target', or a null pointer if none exists. */ | |
1633 | static struct ofservice * | |
1634 | ofservice_lookup(struct connmgr *mgr, const char *target) | |
1635 | { | |
1636 | struct ofservice *ofservice; | |
1637 | ||
1638 | HMAP_FOR_EACH_WITH_HASH (ofservice, node, hash_string(target, 0), | |
1639 | &mgr->services) { | |
1640 | if (!strcmp(pvconn_get_name(ofservice->pvconn), target)) { | |
1641 | return ofservice; | |
1642 | } | |
1643 | } | |
1644 | return NULL; | |
1645 | } |