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19a87e36 BP |
1 | /* |
2 | * Copyright (c) 2009, 2010, 2011 Nicira Networks. | |
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" | |
25 | #include "dpif.h" | |
26 | #include "fail-open.h" | |
27 | #include "in-band.h" | |
28 | #include "odp-util.h" | |
29 | #include "ofp-util.h" | |
30 | #include "ofpbuf.h" | |
31 | #include "pinsched.h" | |
32 | #include "poll-loop.h" | |
33 | #include "pktbuf.h" | |
34 | #include "rconn.h" | |
35 | #include "shash.h" | |
36 | #include "timeval.h" | |
37 | #include "vconn.h" | |
38 | #include "vlog.h" | |
39 | ||
40 | VLOG_DEFINE_THIS_MODULE(connmgr); | |
41 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
42 | ||
43 | COVERAGE_DEFINE(ofconn_stuck); | |
44 | ||
45 | /* An OpenFlow connection. */ | |
46 | struct ofconn { | |
47 | struct connmgr *connmgr; /* Connection's manager. */ | |
48 | struct list node; /* In struct connmgr's "all_conns" list. */ | |
49 | struct rconn *rconn; /* OpenFlow connection. */ | |
50 | enum ofconn_type type; /* Type. */ | |
51 | enum nx_flow_format flow_format; /* Currently selected flow format. */ | |
52 | ||
53 | /* OFPT_PACKET_IN related data. */ | |
54 | struct rconn_packet_counter *packet_in_counter; /* # queued on 'rconn'. */ | |
55 | #define N_SCHEDULERS 2 | |
56 | struct pinsched *schedulers[N_SCHEDULERS]; | |
57 | struct pktbuf *pktbuf; /* OpenFlow packet buffers. */ | |
58 | int miss_send_len; /* Bytes to send of buffered packets. */ | |
59 | ||
60 | /* Number of OpenFlow messages queued on 'rconn' as replies to OpenFlow | |
61 | * requests, and the maximum number before we stop reading OpenFlow | |
62 | * requests. */ | |
63 | #define OFCONN_REPLY_MAX 100 | |
64 | struct rconn_packet_counter *reply_counter; | |
65 | ||
66 | /* type == OFCONN_PRIMARY only. */ | |
67 | enum nx_role role; /* Role. */ | |
68 | struct hmap_node hmap_node; /* In struct connmgr's "controllers" map. */ | |
69 | enum ofproto_band band; /* In-band or out-of-band? */ | |
70 | }; | |
71 | ||
72 | static struct ofconn *ofconn_create(struct connmgr *, struct rconn *, | |
73 | enum ofconn_type); | |
74 | static void ofconn_destroy(struct ofconn *); | |
75 | ||
76 | static void ofconn_reconfigure(struct ofconn *, | |
77 | const struct ofproto_controller *); | |
78 | ||
79 | static void ofconn_run(struct ofconn *, | |
80 | void (*handle_openflow)(struct ofconn *, | |
81 | struct ofpbuf *ofp_msg)); | |
82 | static void ofconn_wait(struct ofconn *); | |
83 | ||
84 | static const char *ofconn_get_target(const struct ofconn *); | |
85 | static char *ofconn_make_name(const struct connmgr *, const char *target); | |
86 | ||
87 | static void ofconn_set_rate_limit(struct ofconn *, int rate, int burst); | |
88 | ||
89 | static bool ofconn_receives_async_msgs(const struct ofconn *); | |
90 | ||
91 | static void ofconn_send(const struct ofconn *, struct ofpbuf *, | |
92 | struct rconn_packet_counter *); | |
93 | ||
94 | static void do_send_packet_in(struct ofpbuf *, void *ofconn_); | |
95 | ||
96 | /* A listener for incoming OpenFlow "service" connections. */ | |
97 | struct ofservice { | |
98 | struct hmap_node node; /* In struct connmgr's "services" hmap. */ | |
99 | struct pvconn *pvconn; /* OpenFlow connection listener. */ | |
100 | ||
101 | /* These are not used by ofservice directly. They are settings for | |
102 | * accepted "struct ofconn"s from the pvconn. */ | |
103 | int probe_interval; /* Max idle time before probing, in seconds. */ | |
104 | int rate_limit; /* Max packet-in rate in packets per second. */ | |
105 | int burst_limit; /* Limit on accumulating packet credits. */ | |
106 | }; | |
107 | ||
108 | static void ofservice_reconfigure(struct ofservice *, | |
109 | const struct ofproto_controller *); | |
110 | static int ofservice_create(struct connmgr *, const char *target); | |
111 | static void ofservice_destroy(struct connmgr *, struct ofservice *); | |
112 | static struct ofservice *ofservice_lookup(struct connmgr *, | |
113 | const char *target); | |
114 | ||
115 | /* Connection manager for an OpenFlow switch. */ | |
116 | struct connmgr { | |
117 | struct ofproto *ofproto; | |
118 | char *name; | |
119 | char *local_port_name; | |
120 | ||
121 | /* OpenFlow connections. */ | |
122 | struct hmap controllers; /* Controller "struct ofconn"s. */ | |
123 | struct list all_conns; /* Contains "struct ofconn"s. */ | |
124 | ||
125 | /* OpenFlow listeners. */ | |
126 | struct hmap services; /* Contains "struct ofservice"s. */ | |
127 | struct pvconn **snoops; | |
128 | size_t n_snoops; | |
129 | ||
130 | /* Fail open. */ | |
131 | struct fail_open *fail_open; | |
132 | enum ofproto_fail_mode fail_mode; | |
133 | ||
134 | /* In-band control. */ | |
135 | struct in_band *in_band; | |
136 | long long int next_in_band_update; | |
137 | struct sockaddr_in *extra_in_band_remotes; | |
138 | size_t n_extra_remotes; | |
139 | int in_band_queue; | |
140 | }; | |
141 | ||
142 | static void update_in_band_remotes(struct connmgr *); | |
143 | static void add_snooper(struct connmgr *, struct vconn *); | |
144 | ||
145 | /* Creates and returns a new connection manager owned by 'ofproto'. 'name' is | |
146 | * a name for the ofproto suitable for using in log messages. | |
147 | * 'local_port_name' is the name of the local port (OFPP_LOCAL) within | |
148 | * 'ofproto'. */ | |
149 | struct connmgr * | |
150 | connmgr_create(struct ofproto *ofproto, | |
151 | const char *name, const char *local_port_name) | |
152 | { | |
153 | struct connmgr *mgr; | |
154 | ||
155 | mgr = xmalloc(sizeof *mgr); | |
156 | mgr->ofproto = ofproto; | |
157 | mgr->name = xstrdup(name); | |
158 | mgr->local_port_name = xstrdup(local_port_name); | |
159 | ||
160 | hmap_init(&mgr->controllers); | |
161 | list_init(&mgr->all_conns); | |
162 | ||
163 | hmap_init(&mgr->services); | |
164 | mgr->snoops = NULL; | |
165 | mgr->n_snoops = 0; | |
166 | ||
167 | mgr->fail_open = NULL; | |
168 | mgr->fail_mode = OFPROTO_FAIL_SECURE; | |
169 | ||
170 | mgr->in_band = NULL; | |
171 | mgr->next_in_band_update = LLONG_MAX; | |
172 | mgr->extra_in_band_remotes = NULL; | |
173 | mgr->n_extra_remotes = 0; | |
174 | mgr->in_band_queue = -1; | |
175 | ||
176 | return mgr; | |
177 | } | |
178 | ||
179 | /* Frees 'mgr' and all of its resources. */ | |
180 | void | |
181 | connmgr_destroy(struct connmgr *mgr) | |
182 | { | |
183 | struct ofservice *ofservice, *next_ofservice; | |
184 | struct ofconn *ofconn, *next_ofconn; | |
185 | size_t i; | |
186 | ||
187 | if (!mgr) { | |
188 | return; | |
189 | } | |
190 | ||
191 | LIST_FOR_EACH_SAFE (ofconn, next_ofconn, node, &mgr->all_conns) { | |
192 | ofconn_destroy(ofconn); | |
193 | } | |
194 | hmap_destroy(&mgr->controllers); | |
195 | ||
196 | HMAP_FOR_EACH_SAFE (ofservice, next_ofservice, node, &mgr->services) { | |
197 | ofservice_destroy(mgr, ofservice); | |
198 | } | |
199 | hmap_destroy(&mgr->services); | |
200 | ||
201 | for (i = 0; i < mgr->n_snoops; i++) { | |
202 | pvconn_close(mgr->snoops[i]); | |
203 | } | |
204 | free(mgr->snoops); | |
205 | ||
206 | fail_open_destroy(mgr->fail_open); | |
207 | mgr->fail_open = NULL; | |
208 | ||
209 | in_band_destroy(mgr->in_band); | |
210 | mgr->in_band = NULL; | |
211 | free(mgr->extra_in_band_remotes); | |
212 | free(mgr->name); | |
213 | free(mgr->local_port_name); | |
214 | ||
215 | free(mgr); | |
216 | } | |
217 | ||
218 | /* Does all of the periodic maintenance required by 'mgr'. Calls | |
219 | * 'handle_openflow' for each message received on an OpenFlow connection, | |
220 | * passing along the OpenFlow connection itself and the message that was sent. | |
221 | * The 'handle_openflow' callback must not free the message. */ | |
222 | void | |
223 | connmgr_run(struct connmgr *mgr, | |
224 | void (*handle_openflow)(struct ofconn *, struct ofpbuf *ofp_msg)) | |
225 | { | |
226 | struct ofconn *ofconn, *next_ofconn; | |
227 | struct ofservice *ofservice; | |
228 | size_t i; | |
229 | ||
230 | if (mgr->in_band) { | |
231 | if (time_msec() >= mgr->next_in_band_update) { | |
232 | update_in_band_remotes(mgr); | |
233 | } | |
234 | in_band_run(mgr->in_band); | |
235 | } | |
236 | ||
237 | LIST_FOR_EACH_SAFE (ofconn, next_ofconn, node, &mgr->all_conns) { | |
238 | ofconn_run(ofconn, handle_openflow); | |
239 | } | |
240 | ||
241 | /* Fail-open maintenance. Do this after processing the ofconns since | |
242 | * fail-open checks the status of the controller rconn. */ | |
243 | if (mgr->fail_open) { | |
244 | fail_open_run(mgr->fail_open); | |
245 | } | |
246 | ||
247 | HMAP_FOR_EACH (ofservice, node, &mgr->services) { | |
248 | struct vconn *vconn; | |
249 | int retval; | |
250 | ||
251 | retval = pvconn_accept(ofservice->pvconn, OFP_VERSION, &vconn); | |
252 | if (!retval) { | |
253 | struct rconn *rconn; | |
254 | char *name; | |
255 | ||
256 | rconn = rconn_create(ofservice->probe_interval, 0); | |
257 | name = ofconn_make_name(mgr, vconn_get_name(vconn)); | |
258 | rconn_connect_unreliably(rconn, vconn, name); | |
259 | free(name); | |
260 | ||
261 | ofconn = ofconn_create(mgr, rconn, OFCONN_SERVICE); | |
262 | ofconn_set_rate_limit(ofconn, ofservice->rate_limit, | |
263 | ofservice->burst_limit); | |
264 | } else if (retval != EAGAIN) { | |
265 | VLOG_WARN_RL(&rl, "accept failed (%s)", strerror(retval)); | |
266 | } | |
267 | } | |
268 | ||
269 | for (i = 0; i < mgr->n_snoops; i++) { | |
270 | struct vconn *vconn; | |
271 | int retval; | |
272 | ||
273 | retval = pvconn_accept(mgr->snoops[i], OFP_VERSION, &vconn); | |
274 | if (!retval) { | |
275 | add_snooper(mgr, vconn); | |
276 | } else if (retval != EAGAIN) { | |
277 | VLOG_WARN_RL(&rl, "accept failed (%s)", strerror(retval)); | |
278 | } | |
279 | } | |
280 | } | |
281 | ||
282 | /* Causes the poll loop to wake up when connmgr_run() needs to run. */ | |
283 | void | |
284 | connmgr_wait(struct connmgr *mgr) | |
285 | { | |
286 | struct ofservice *ofservice; | |
287 | struct ofconn *ofconn; | |
288 | size_t i; | |
289 | ||
290 | LIST_FOR_EACH (ofconn, node, &mgr->all_conns) { | |
291 | ofconn_wait(ofconn); | |
292 | } | |
293 | if (mgr->in_band) { | |
294 | poll_timer_wait_until(mgr->next_in_band_update); | |
295 | in_band_wait(mgr->in_band); | |
296 | } | |
297 | if (mgr->fail_open) { | |
298 | fail_open_wait(mgr->fail_open); | |
299 | } | |
300 | HMAP_FOR_EACH (ofservice, node, &mgr->services) { | |
301 | pvconn_wait(ofservice->pvconn); | |
302 | } | |
303 | for (i = 0; i < mgr->n_snoops; i++) { | |
304 | pvconn_wait(mgr->snoops[i]); | |
305 | } | |
306 | } | |
307 | ||
308 | /* Returns the ofproto that owns 'ofconn''s connmgr. */ | |
309 | struct ofproto * | |
310 | ofconn_get_ofproto(const struct ofconn *ofconn) | |
311 | { | |
312 | return ofconn->connmgr->ofproto; | |
313 | } | |
314 | \f | |
315 | /* OpenFlow configuration. */ | |
316 | ||
317 | static void add_controller(struct connmgr *, const char *target); | |
318 | static struct ofconn *find_controller_by_target(struct connmgr *, | |
319 | const char *target); | |
320 | static void update_fail_open(struct connmgr *); | |
321 | static int set_pvconns(struct pvconn ***pvconnsp, size_t *n_pvconnsp, | |
81e2083f | 322 | const struct sset *); |
19a87e36 BP |
323 | |
324 | /* Returns true if 'mgr' has any configured primary controllers. | |
325 | * | |
326 | * Service controllers do not count, but configured primary controllers do | |
327 | * count whether or not they are currently connected. */ | |
328 | bool | |
329 | connmgr_has_controllers(const struct connmgr *mgr) | |
330 | { | |
331 | return !hmap_is_empty(&mgr->controllers); | |
332 | } | |
333 | ||
334 | /* Initializes 'info' and populates it with information about each configured | |
335 | * primary controller. The keys in 'info' are the controllers' targets; the | |
336 | * data values are corresponding "struct ofproto_controller_info". | |
337 | * | |
338 | * The caller owns 'info' and everything in it and should free it when it is no | |
339 | * longer needed. */ | |
340 | void | |
341 | connmgr_get_controller_info(struct connmgr *mgr, struct shash *info) | |
342 | { | |
343 | const struct ofconn *ofconn; | |
344 | ||
345 | shash_init(info); | |
346 | ||
347 | HMAP_FOR_EACH (ofconn, hmap_node, &mgr->controllers) { | |
348 | const struct rconn *rconn = ofconn->rconn; | |
349 | time_t now = time_now(); | |
350 | time_t last_connection = rconn_get_last_connection(rconn); | |
351 | time_t last_disconnect = rconn_get_last_disconnect(rconn); | |
352 | int last_error = rconn_get_last_error(rconn); | |
353 | struct ofproto_controller_info *cinfo = xmalloc(sizeof *cinfo); | |
354 | ||
355 | shash_add(info, rconn_get_target(rconn), cinfo); | |
356 | ||
357 | cinfo->is_connected = rconn_is_connected(rconn); | |
358 | cinfo->role = ofconn->role; | |
359 | ||
360 | cinfo->pairs.n = 0; | |
361 | ||
362 | if (last_error) { | |
363 | cinfo->pairs.keys[cinfo->pairs.n] = "last_error"; | |
364 | cinfo->pairs.values[cinfo->pairs.n++] = | |
365 | xstrdup(ovs_retval_to_string(last_error)); | |
366 | } | |
367 | ||
368 | cinfo->pairs.keys[cinfo->pairs.n] = "state"; | |
369 | cinfo->pairs.values[cinfo->pairs.n++] = | |
370 | xstrdup(rconn_get_state(rconn)); | |
371 | ||
372 | if (last_connection != TIME_MIN) { | |
373 | cinfo->pairs.keys[cinfo->pairs.n] = "sec_since_connect"; | |
374 | cinfo->pairs.values[cinfo->pairs.n++] | |
375 | = xasprintf("%ld", (long int) (now - last_connection)); | |
376 | } | |
377 | ||
378 | if (last_disconnect != TIME_MIN) { | |
379 | cinfo->pairs.keys[cinfo->pairs.n] = "sec_since_disconnect"; | |
380 | cinfo->pairs.values[cinfo->pairs.n++] | |
381 | = xasprintf("%ld", (long int) (now - last_disconnect)); | |
382 | } | |
383 | } | |
384 | } | |
385 | ||
386 | /* Changes 'mgr''s set of controllers to the 'n_controllers' controllers in | |
387 | * 'controllers'. */ | |
388 | void | |
389 | connmgr_set_controllers(struct connmgr *mgr, | |
390 | const struct ofproto_controller *controllers, | |
391 | size_t n_controllers) | |
392 | { | |
393 | struct shash new_controllers; | |
394 | struct ofconn *ofconn, *next_ofconn; | |
395 | struct ofservice *ofservice, *next_ofservice; | |
396 | bool ss_exists; | |
397 | size_t i; | |
398 | ||
399 | /* Create newly configured controllers and services. | |
400 | * Create a name to ofproto_controller mapping in 'new_controllers'. */ | |
401 | shash_init(&new_controllers); | |
402 | for (i = 0; i < n_controllers; i++) { | |
403 | const struct ofproto_controller *c = &controllers[i]; | |
404 | ||
405 | if (!vconn_verify_name(c->target)) { | |
406 | if (!find_controller_by_target(mgr, c->target)) { | |
407 | add_controller(mgr, c->target); | |
408 | } | |
409 | } else if (!pvconn_verify_name(c->target)) { | |
410 | if (!ofservice_lookup(mgr, c->target)) { | |
411 | ofservice_create(mgr, c->target); | |
412 | } | |
413 | } else { | |
414 | VLOG_WARN_RL(&rl, "%s: unsupported controller \"%s\"", | |
415 | mgr->name, c->target); | |
416 | continue; | |
417 | } | |
418 | ||
419 | shash_add_once(&new_controllers, c->target, &controllers[i]); | |
420 | } | |
421 | ||
422 | /* Delete controllers that are no longer configured. | |
423 | * Update configuration of all now-existing controllers. */ | |
424 | ss_exists = false; | |
425 | HMAP_FOR_EACH_SAFE (ofconn, next_ofconn, hmap_node, &mgr->controllers) { | |
426 | struct ofproto_controller *c; | |
427 | ||
428 | c = shash_find_data(&new_controllers, ofconn_get_target(ofconn)); | |
429 | if (!c) { | |
430 | ofconn_destroy(ofconn); | |
431 | } else { | |
432 | ofconn_reconfigure(ofconn, c); | |
433 | } | |
434 | } | |
435 | ||
436 | /* Delete services that are no longer configured. | |
437 | * Update configuration of all now-existing services. */ | |
438 | HMAP_FOR_EACH_SAFE (ofservice, next_ofservice, node, &mgr->services) { | |
439 | struct ofproto_controller *c; | |
440 | ||
441 | c = shash_find_data(&new_controllers, | |
442 | pvconn_get_name(ofservice->pvconn)); | |
443 | if (!c) { | |
444 | ofservice_destroy(mgr, ofservice); | |
445 | } else { | |
446 | ofservice_reconfigure(ofservice, c); | |
447 | } | |
448 | } | |
449 | ||
450 | shash_destroy(&new_controllers); | |
451 | ||
452 | update_in_band_remotes(mgr); | |
453 | update_fail_open(mgr); | |
454 | } | |
455 | ||
456 | /* Drops the connections between 'mgr' and all of its primary and secondary | |
457 | * controllers, forcing them to reconnect. */ | |
458 | void | |
459 | connmgr_reconnect(const struct connmgr *mgr) | |
460 | { | |
461 | struct ofconn *ofconn; | |
462 | ||
463 | LIST_FOR_EACH (ofconn, node, &mgr->all_conns) { | |
464 | rconn_reconnect(ofconn->rconn); | |
465 | } | |
466 | } | |
467 | ||
468 | /* Sets the "snoops" for 'mgr' to the pvconn targets listed in 'snoops'. | |
469 | * | |
470 | * A "snoop" is a pvconn to which every OpenFlow message to or from the most | |
471 | * important controller on 'mgr' is mirrored. */ | |
472 | int | |
81e2083f | 473 | connmgr_set_snoops(struct connmgr *mgr, const struct sset *snoops) |
19a87e36 BP |
474 | { |
475 | return set_pvconns(&mgr->snoops, &mgr->n_snoops, snoops); | |
476 | } | |
477 | ||
478 | /* Adds each of the snoops currently configured on 'mgr' to 'snoops'. */ | |
479 | void | |
81e2083f | 480 | connmgr_get_snoops(const struct connmgr *mgr, struct sset *snoops) |
19a87e36 BP |
481 | { |
482 | size_t i; | |
483 | ||
484 | for (i = 0; i < mgr->n_snoops; i++) { | |
81e2083f | 485 | sset_add(snoops, pvconn_get_name(mgr->snoops[i])); |
19a87e36 BP |
486 | } |
487 | } | |
488 | ||
81e2083f BP |
489 | /* Returns true if 'mgr' has at least one snoop, false if it has none. */ |
490 | bool | |
491 | connmgr_has_snoops(const struct connmgr *mgr) | |
492 | { | |
493 | return mgr->n_snoops > 0; | |
494 | } | |
495 | ||
19a87e36 BP |
496 | /* Creates a new controller for 'target' in 'mgr'. update_controller() needs |
497 | * to be called later to finish the new ofconn's configuration. */ | |
498 | static void | |
499 | add_controller(struct connmgr *mgr, const char *target) | |
500 | { | |
501 | char *name = ofconn_make_name(mgr, target); | |
502 | struct ofconn *ofconn; | |
503 | ||
504 | ofconn = ofconn_create(mgr, rconn_create(5, 8), OFCONN_PRIMARY); | |
505 | ofconn->pktbuf = pktbuf_create(); | |
506 | ofconn->miss_send_len = OFP_DEFAULT_MISS_SEND_LEN; | |
507 | rconn_connect(ofconn->rconn, target, name); | |
508 | hmap_insert(&mgr->controllers, &ofconn->hmap_node, hash_string(target, 0)); | |
509 | ||
510 | free(name); | |
511 | } | |
512 | ||
513 | static struct ofconn * | |
514 | find_controller_by_target(struct connmgr *mgr, const char *target) | |
515 | { | |
516 | struct ofconn *ofconn; | |
517 | ||
518 | HMAP_FOR_EACH_WITH_HASH (ofconn, hmap_node, | |
519 | hash_string(target, 0), &mgr->controllers) { | |
520 | if (!strcmp(ofconn_get_target(ofconn), target)) { | |
521 | return ofconn; | |
522 | } | |
523 | } | |
524 | return NULL; | |
525 | } | |
526 | ||
527 | static void | |
528 | update_in_band_remotes(struct connmgr *mgr) | |
529 | { | |
530 | struct sockaddr_in *addrs; | |
531 | size_t max_addrs, n_addrs; | |
532 | struct ofconn *ofconn; | |
533 | size_t i; | |
534 | ||
535 | /* Allocate enough memory for as many remotes as we could possibly have. */ | |
536 | max_addrs = mgr->n_extra_remotes + hmap_count(&mgr->controllers); | |
537 | addrs = xmalloc(max_addrs * sizeof *addrs); | |
538 | n_addrs = 0; | |
539 | ||
540 | /* Add all the remotes. */ | |
541 | HMAP_FOR_EACH (ofconn, hmap_node, &mgr->controllers) { | |
542 | struct sockaddr_in *sin = &addrs[n_addrs]; | |
543 | ||
544 | if (ofconn->band == OFPROTO_OUT_OF_BAND) { | |
545 | continue; | |
546 | } | |
547 | ||
548 | sin->sin_addr.s_addr = rconn_get_remote_ip(ofconn->rconn); | |
549 | if (sin->sin_addr.s_addr) { | |
550 | sin->sin_port = rconn_get_remote_port(ofconn->rconn); | |
551 | n_addrs++; | |
552 | } | |
553 | } | |
554 | for (i = 0; i < mgr->n_extra_remotes; i++) { | |
555 | addrs[n_addrs++] = mgr->extra_in_band_remotes[i]; | |
556 | } | |
557 | ||
558 | /* Create or update or destroy in-band. */ | |
559 | if (n_addrs) { | |
560 | if (!mgr->in_band) { | |
561 | in_band_create(mgr->ofproto, mgr->local_port_name, &mgr->in_band); | |
562 | } | |
563 | if (mgr->in_band) { | |
564 | in_band_set_remotes(mgr->in_band, addrs, n_addrs); | |
565 | } | |
566 | in_band_set_queue(mgr->in_band, mgr->in_band_queue); | |
567 | mgr->next_in_band_update = time_msec() + 1000; | |
568 | } else { | |
569 | in_band_destroy(mgr->in_band); | |
570 | mgr->in_band = NULL; | |
571 | } | |
572 | ||
573 | /* Clean up. */ | |
574 | free(addrs); | |
575 | } | |
576 | ||
577 | static void | |
578 | update_fail_open(struct connmgr *mgr) | |
579 | { | |
580 | if (connmgr_has_controllers(mgr) | |
581 | && mgr->fail_mode == OFPROTO_FAIL_STANDALONE) { | |
582 | if (!mgr->fail_open) { | |
583 | mgr->fail_open = fail_open_create(mgr->ofproto, mgr); | |
584 | } | |
585 | } else { | |
586 | fail_open_destroy(mgr->fail_open); | |
587 | mgr->fail_open = NULL; | |
588 | } | |
589 | } | |
590 | ||
591 | static int | |
592 | set_pvconns(struct pvconn ***pvconnsp, size_t *n_pvconnsp, | |
81e2083f | 593 | const struct sset *sset) |
19a87e36 BP |
594 | { |
595 | struct pvconn **pvconns = *pvconnsp; | |
596 | size_t n_pvconns = *n_pvconnsp; | |
81e2083f | 597 | const char *name; |
19a87e36 BP |
598 | int retval = 0; |
599 | size_t i; | |
600 | ||
601 | for (i = 0; i < n_pvconns; i++) { | |
602 | pvconn_close(pvconns[i]); | |
603 | } | |
604 | free(pvconns); | |
605 | ||
81e2083f | 606 | pvconns = xmalloc(sset_count(sset) * sizeof *pvconns); |
19a87e36 | 607 | n_pvconns = 0; |
81e2083f | 608 | SSET_FOR_EACH (name, sset) { |
19a87e36 BP |
609 | struct pvconn *pvconn; |
610 | int error; | |
611 | ||
612 | error = pvconn_open(name, &pvconn); | |
613 | if (!error) { | |
614 | pvconns[n_pvconns++] = pvconn; | |
615 | } else { | |
616 | VLOG_ERR("failed to listen on %s: %s", name, strerror(error)); | |
617 | if (!retval) { | |
618 | retval = error; | |
619 | } | |
620 | } | |
621 | } | |
622 | ||
623 | *pvconnsp = pvconns; | |
624 | *n_pvconnsp = n_pvconns; | |
625 | ||
626 | return retval; | |
627 | } | |
628 | ||
629 | /* Returns a "preference level" for snooping 'ofconn'. A higher return value | |
630 | * means that 'ofconn' is more interesting for monitoring than a lower return | |
631 | * value. */ | |
632 | static int | |
633 | snoop_preference(const struct ofconn *ofconn) | |
634 | { | |
635 | switch (ofconn->role) { | |
636 | case NX_ROLE_MASTER: | |
637 | return 3; | |
638 | case NX_ROLE_OTHER: | |
639 | return 2; | |
640 | case NX_ROLE_SLAVE: | |
641 | return 1; | |
642 | default: | |
643 | /* Shouldn't happen. */ | |
644 | return 0; | |
645 | } | |
646 | } | |
647 | ||
648 | /* One of 'mgr''s "snoop" pvconns has accepted a new connection on 'vconn'. | |
649 | * Connects this vconn to a controller. */ | |
650 | static void | |
651 | add_snooper(struct connmgr *mgr, struct vconn *vconn) | |
652 | { | |
653 | struct ofconn *ofconn, *best; | |
654 | ||
655 | /* Pick a controller for monitoring. */ | |
656 | best = NULL; | |
657 | LIST_FOR_EACH (ofconn, node, &mgr->all_conns) { | |
658 | if (ofconn->type == OFCONN_PRIMARY | |
659 | && (!best || snoop_preference(ofconn) > snoop_preference(best))) { | |
660 | best = ofconn; | |
661 | } | |
662 | } | |
663 | ||
664 | if (best) { | |
665 | rconn_add_monitor(best->rconn, vconn); | |
666 | } else { | |
667 | VLOG_INFO_RL(&rl, "no controller connection to snoop"); | |
668 | vconn_close(vconn); | |
669 | } | |
670 | } | |
671 | \f | |
672 | /* Public ofconn functions. */ | |
673 | ||
674 | /* Returns the connection type, either OFCONN_PRIMARY or OFCONN_SERVICE. */ | |
675 | enum ofconn_type | |
676 | ofconn_get_type(const struct ofconn *ofconn) | |
677 | { | |
678 | return ofconn->type; | |
679 | } | |
680 | ||
681 | /* Returns the role configured for 'ofconn'. | |
682 | * | |
683 | * The default role, if no other role has been set, is NX_ROLE_OTHER. */ | |
684 | enum nx_role | |
685 | ofconn_get_role(const struct ofconn *ofconn) | |
686 | { | |
687 | return ofconn->role; | |
688 | } | |
689 | ||
690 | /* Changes 'ofconn''s role to 'role'. If 'role' is NX_ROLE_MASTER then any | |
691 | * existing master is demoted to a slave. */ | |
692 | void | |
693 | ofconn_set_role(struct ofconn *ofconn, enum nx_role role) | |
694 | { | |
695 | if (role == NX_ROLE_MASTER) { | |
696 | struct ofconn *other; | |
697 | ||
698 | HMAP_FOR_EACH (other, hmap_node, &ofconn->connmgr->controllers) { | |
699 | if (other->role == NX_ROLE_MASTER) { | |
700 | other->role = NX_ROLE_SLAVE; | |
701 | } | |
702 | } | |
703 | } | |
704 | ofconn->role = role; | |
705 | } | |
706 | ||
707 | /* Returns the currently configured flow format for 'ofconn', one of NXFF_*. | |
708 | * | |
709 | * The default, if no other format has been set, is NXFF_OPENFLOW10. */ | |
710 | enum nx_flow_format | |
711 | ofconn_get_flow_format(struct ofconn *ofconn) | |
712 | { | |
713 | return ofconn->flow_format; | |
714 | } | |
715 | ||
716 | /* Sets the flow format for 'ofconn' to 'flow_format' (one of NXFF_*). */ | |
717 | void | |
718 | ofconn_set_flow_format(struct ofconn *ofconn, enum nx_flow_format flow_format) | |
719 | { | |
720 | ofconn->flow_format = flow_format; | |
721 | } | |
722 | ||
723 | /* Returns the default miss send length for 'ofconn'. */ | |
724 | int | |
725 | ofconn_get_miss_send_len(const struct ofconn *ofconn) | |
726 | { | |
727 | return ofconn->miss_send_len; | |
728 | } | |
729 | ||
730 | /* Sets the default miss send length for 'ofconn' to 'miss_send_len'. */ | |
731 | void | |
732 | ofconn_set_miss_send_len(struct ofconn *ofconn, int miss_send_len) | |
733 | { | |
734 | ofconn->miss_send_len = miss_send_len; | |
735 | } | |
736 | ||
737 | /* Sends 'msg' on 'ofconn', accounting it as a reply. (If there is a | |
738 | * sufficient number of OpenFlow replies in-flight on a single ofconn, then the | |
739 | * connmgr will stop accepting new OpenFlow requests on that ofconn until the | |
740 | * controller has accepted some of the replies.) */ | |
741 | void | |
742 | ofconn_send_reply(const struct ofconn *ofconn, struct ofpbuf *msg) | |
743 | { | |
744 | ofconn_send(ofconn, msg, ofconn->reply_counter); | |
745 | } | |
746 | ||
747 | /* Same as pktbuf_retrieve(), using the pktbuf owned by 'ofconn'. */ | |
748 | int | |
749 | ofconn_pktbuf_retrieve(struct ofconn *ofconn, uint32_t id, | |
750 | struct ofpbuf **bufferp, uint16_t *in_port) | |
751 | { | |
752 | return pktbuf_retrieve(ofconn->pktbuf, id, bufferp, in_port); | |
753 | } | |
754 | \f | |
755 | /* Private ofconn functions. */ | |
756 | ||
757 | static const char * | |
758 | ofconn_get_target(const struct ofconn *ofconn) | |
759 | { | |
760 | return rconn_get_target(ofconn->rconn); | |
761 | } | |
762 | ||
763 | static struct ofconn * | |
764 | ofconn_create(struct connmgr *mgr, struct rconn *rconn, enum ofconn_type type) | |
765 | { | |
766 | struct ofconn *ofconn = xzalloc(sizeof *ofconn); | |
767 | ofconn->connmgr = mgr; | |
768 | list_push_back(&mgr->all_conns, &ofconn->node); | |
769 | ofconn->rconn = rconn; | |
770 | ofconn->type = type; | |
771 | ofconn->flow_format = NXFF_OPENFLOW10; | |
772 | ofconn->role = NX_ROLE_OTHER; | |
773 | ofconn->packet_in_counter = rconn_packet_counter_create (); | |
774 | ofconn->pktbuf = NULL; | |
775 | ofconn->miss_send_len = 0; | |
776 | ofconn->reply_counter = rconn_packet_counter_create (); | |
777 | return ofconn; | |
778 | } | |
779 | ||
780 | static void | |
781 | ofconn_destroy(struct ofconn *ofconn) | |
782 | { | |
783 | if (ofconn->type == OFCONN_PRIMARY) { | |
784 | hmap_remove(&ofconn->connmgr->controllers, &ofconn->hmap_node); | |
785 | } | |
786 | ||
787 | list_remove(&ofconn->node); | |
788 | rconn_destroy(ofconn->rconn); | |
789 | rconn_packet_counter_destroy(ofconn->packet_in_counter); | |
790 | rconn_packet_counter_destroy(ofconn->reply_counter); | |
791 | pktbuf_destroy(ofconn->pktbuf); | |
792 | free(ofconn); | |
793 | } | |
794 | ||
795 | /* Reconfigures 'ofconn' to match 'c'. 'ofconn' and 'c' must have the same | |
796 | * target. */ | |
797 | static void | |
798 | ofconn_reconfigure(struct ofconn *ofconn, const struct ofproto_controller *c) | |
799 | { | |
800 | int probe_interval; | |
801 | ||
802 | ofconn->band = c->band; | |
803 | ||
804 | rconn_set_max_backoff(ofconn->rconn, c->max_backoff); | |
805 | ||
806 | probe_interval = c->probe_interval ? MAX(c->probe_interval, 5) : 0; | |
807 | rconn_set_probe_interval(ofconn->rconn, probe_interval); | |
808 | ||
809 | ofconn_set_rate_limit(ofconn, c->rate_limit, c->burst_limit); | |
810 | } | |
811 | ||
812 | static void | |
813 | ofconn_run(struct ofconn *ofconn, | |
814 | void (*handle_openflow)(struct ofconn *, struct ofpbuf *ofp_msg)) | |
815 | { | |
816 | struct connmgr *mgr = ofconn->connmgr; | |
817 | int iteration; | |
818 | size_t i; | |
819 | ||
820 | for (i = 0; i < N_SCHEDULERS; i++) { | |
821 | pinsched_run(ofconn->schedulers[i], do_send_packet_in, ofconn); | |
822 | } | |
823 | ||
824 | rconn_run(ofconn->rconn); | |
825 | ||
826 | if (rconn_packet_counter_read (ofconn->reply_counter) < OFCONN_REPLY_MAX) { | |
827 | /* Limit the number of iterations to prevent other tasks from | |
828 | * starving. */ | |
829 | for (iteration = 0; iteration < 50; iteration++) { | |
830 | struct ofpbuf *of_msg = rconn_recv(ofconn->rconn); | |
831 | if (!of_msg) { | |
832 | break; | |
833 | } | |
834 | if (mgr->fail_open) { | |
835 | fail_open_maybe_recover(mgr->fail_open); | |
836 | } | |
837 | handle_openflow(ofconn, of_msg); | |
838 | ofpbuf_delete(of_msg); | |
839 | } | |
840 | } | |
841 | ||
842 | if (!rconn_is_alive(ofconn->rconn)) { | |
843 | ofconn_destroy(ofconn); | |
844 | } | |
845 | } | |
846 | ||
847 | static void | |
848 | ofconn_wait(struct ofconn *ofconn) | |
849 | { | |
850 | int i; | |
851 | ||
852 | for (i = 0; i < N_SCHEDULERS; i++) { | |
853 | pinsched_wait(ofconn->schedulers[i]); | |
854 | } | |
855 | rconn_run_wait(ofconn->rconn); | |
856 | if (rconn_packet_counter_read (ofconn->reply_counter) < OFCONN_REPLY_MAX) { | |
857 | rconn_recv_wait(ofconn->rconn); | |
858 | } else { | |
859 | COVERAGE_INC(ofconn_stuck); | |
860 | } | |
861 | } | |
862 | ||
863 | /* Returns true if 'ofconn' should receive asynchronous messages. */ | |
864 | static bool | |
865 | ofconn_receives_async_msgs(const struct ofconn *ofconn) | |
866 | { | |
867 | if (!rconn_is_connected(ofconn->rconn)) { | |
868 | return false; | |
869 | } else if (ofconn->type == OFCONN_PRIMARY) { | |
870 | /* Primary controllers always get asynchronous messages unless they | |
871 | * have configured themselves as "slaves". */ | |
872 | return ofconn->role != NX_ROLE_SLAVE; | |
873 | } else { | |
874 | /* Service connections don't get asynchronous messages unless they have | |
875 | * explicitly asked for them by setting a nonzero miss send length. */ | |
876 | return ofconn->miss_send_len > 0; | |
877 | } | |
878 | } | |
879 | ||
880 | /* Returns a human-readable name for an OpenFlow connection between 'mgr' and | |
881 | * 'target', suitable for use in log messages for identifying the connection. | |
882 | * | |
883 | * The name is dynamically allocated. The caller should free it (with free()) | |
884 | * when it is no longer needed. */ | |
885 | static char * | |
886 | ofconn_make_name(const struct connmgr *mgr, const char *target) | |
887 | { | |
888 | return xasprintf("%s<->%s", mgr->name, target); | |
889 | } | |
890 | ||
891 | static void | |
892 | ofconn_set_rate_limit(struct ofconn *ofconn, int rate, int burst) | |
893 | { | |
894 | int i; | |
895 | ||
896 | for (i = 0; i < N_SCHEDULERS; i++) { | |
897 | struct pinsched **s = &ofconn->schedulers[i]; | |
898 | ||
899 | if (rate > 0) { | |
900 | if (!*s) { | |
901 | *s = pinsched_create(rate, burst); | |
902 | } else { | |
903 | pinsched_set_limits(*s, rate, burst); | |
904 | } | |
905 | } else { | |
906 | pinsched_destroy(*s); | |
907 | *s = NULL; | |
908 | } | |
909 | } | |
910 | } | |
911 | ||
912 | static void | |
913 | ofconn_send(const struct ofconn *ofconn, struct ofpbuf *msg, | |
914 | struct rconn_packet_counter *counter) | |
915 | { | |
916 | update_openflow_length(msg); | |
917 | if (rconn_send(ofconn->rconn, msg, counter)) { | |
918 | ofpbuf_delete(msg); | |
919 | } | |
920 | } | |
921 | \f | |
922 | /* Sending asynchronous messages. */ | |
923 | ||
924 | static void schedule_packet_in(struct ofconn *, const struct dpif_upcall *, | |
925 | const struct flow *, struct ofpbuf *rw_packet); | |
926 | ||
927 | /* Sends an OFPT_PORT_STATUS message with 'opp' and 'reason' to appropriate | |
928 | * controllers managed by 'mgr'. | |
929 | * | |
930 | * 'opp' is in *HOST* byte order. */ | |
931 | void | |
932 | connmgr_send_port_status(struct connmgr *mgr, const struct ofp_phy_port *opp, | |
933 | uint8_t reason) | |
934 | { | |
935 | /* XXX Should limit the number of queued port status change messages. */ | |
936 | struct ofconn *ofconn; | |
937 | ||
938 | LIST_FOR_EACH (ofconn, node, &mgr->all_conns) { | |
939 | struct ofp_port_status *ops; | |
940 | struct ofpbuf *b; | |
941 | ||
942 | /* Primary controllers, even slaves, should always get port status | |
943 | updates. Otherwise obey ofconn_receives_async_msgs(). */ | |
944 | if (ofconn->type != OFCONN_PRIMARY | |
945 | && !ofconn_receives_async_msgs(ofconn)) { | |
946 | continue; | |
947 | } | |
948 | ||
949 | ops = make_openflow_xid(sizeof *ops, OFPT_PORT_STATUS, 0, &b); | |
950 | ops->reason = reason; | |
951 | ops->desc = *opp; | |
952 | hton_ofp_phy_port(&ops->desc); | |
953 | ofconn_send(ofconn, b, NULL); | |
954 | } | |
955 | } | |
956 | ||
957 | /* Sends an OFPT_FLOW_REMOVED or NXT_FLOW_REMOVED message based on 'fr' to | |
958 | * appropriate controllers managed by 'mgr'. */ | |
959 | void | |
960 | connmgr_send_flow_removed(struct connmgr *mgr, | |
961 | const struct ofputil_flow_removed *fr) | |
962 | { | |
963 | struct ofconn *ofconn; | |
964 | ||
965 | LIST_FOR_EACH (ofconn, node, &mgr->all_conns) { | |
966 | struct ofpbuf *msg; | |
967 | ||
968 | if (!ofconn_receives_async_msgs(ofconn)) { | |
969 | continue; | |
970 | } | |
971 | ||
972 | /* Account flow expirations as replies to OpenFlow requests. That | |
973 | * works because preventing OpenFlow requests from being processed also | |
974 | * prevents new flows from being added (and expiring). (It also | |
975 | * prevents processing OpenFlow requests that would not add new flows, | |
976 | * so it is imperfect.) */ | |
977 | msg = ofputil_encode_flow_removed(fr, ofconn->flow_format); | |
978 | ofconn_send_reply(ofconn, msg); | |
979 | } | |
980 | } | |
981 | ||
982 | /* Given 'upcall', of type DPIF_UC_ACTION or DPIF_UC_MISS, sends an | |
983 | * OFPT_PACKET_IN message to each OpenFlow controller as necessary according to | |
984 | * their individual configurations. | |
985 | * | |
986 | * 'rw_packet' may be NULL. Otherwise, 'rw_packet' must contain the same data | |
987 | * as upcall->packet. (rw_packet == upcall->packet is also valid.) Ownership | |
988 | * of 'rw_packet' is transferred to this function. */ | |
989 | void | |
990 | connmgr_send_packet_in(struct connmgr *mgr, const struct dpif_upcall *upcall, | |
991 | const struct flow *flow, struct ofpbuf *rw_packet) | |
992 | { | |
993 | struct ofconn *ofconn, *prev; | |
994 | ||
995 | prev = NULL; | |
996 | LIST_FOR_EACH (ofconn, node, &mgr->all_conns) { | |
997 | if (ofconn_receives_async_msgs(ofconn)) { | |
998 | if (prev) { | |
999 | schedule_packet_in(prev, upcall, flow, NULL); | |
1000 | } | |
1001 | prev = ofconn; | |
1002 | } | |
1003 | } | |
1004 | if (prev) { | |
1005 | schedule_packet_in(prev, upcall, flow, rw_packet); | |
1006 | } else { | |
1007 | ofpbuf_delete(rw_packet); | |
1008 | } | |
1009 | } | |
1010 | ||
1011 | /* pinsched callback for sending 'ofp_packet_in' on 'ofconn'. */ | |
1012 | static void | |
1013 | do_send_packet_in(struct ofpbuf *ofp_packet_in, void *ofconn_) | |
1014 | { | |
1015 | struct ofconn *ofconn = ofconn_; | |
1016 | ||
1017 | rconn_send_with_limit(ofconn->rconn, ofp_packet_in, | |
1018 | ofconn->packet_in_counter, 100); | |
1019 | } | |
1020 | ||
1021 | /* Takes 'upcall', whose packet has the flow specified by 'flow', composes an | |
1022 | * OpenFlow packet-in message from it, and passes it to 'ofconn''s packet | |
1023 | * scheduler for sending. | |
1024 | * | |
1025 | * 'rw_packet' may be NULL. Otherwise, 'rw_packet' must contain the same data | |
1026 | * as upcall->packet. (rw_packet == upcall->packet is also valid.) Ownership | |
1027 | * of 'rw_packet' is transferred to this function. */ | |
1028 | static void | |
1029 | schedule_packet_in(struct ofconn *ofconn, const struct dpif_upcall *upcall, | |
1030 | const struct flow *flow, struct ofpbuf *rw_packet) | |
1031 | { | |
1032 | struct connmgr *mgr = ofconn->connmgr; | |
1033 | struct ofputil_packet_in pin; | |
1034 | ||
1035 | /* Figure out the easy parts. */ | |
1036 | pin.packet = upcall->packet; | |
1037 | pin.in_port = odp_port_to_ofp_port(flow->in_port); | |
1038 | pin.reason = upcall->type == DPIF_UC_MISS ? OFPR_NO_MATCH : OFPR_ACTION; | |
1039 | ||
1040 | /* Get OpenFlow buffer_id. */ | |
1041 | if (upcall->type == DPIF_UC_ACTION) { | |
1042 | pin.buffer_id = UINT32_MAX; | |
1043 | } else if (mgr->fail_open && fail_open_is_active(mgr->fail_open)) { | |
1044 | pin.buffer_id = pktbuf_get_null(); | |
1045 | } else if (!ofconn->pktbuf) { | |
1046 | pin.buffer_id = UINT32_MAX; | |
1047 | } else { | |
1048 | pin.buffer_id = pktbuf_save(ofconn->pktbuf, upcall->packet, | |
1049 | flow->in_port); | |
1050 | } | |
1051 | ||
1052 | /* Figure out how much of the packet to send. */ | |
1053 | pin.send_len = upcall->packet->size; | |
1054 | if (pin.buffer_id != UINT32_MAX) { | |
1055 | pin.send_len = MIN(pin.send_len, ofconn->miss_send_len); | |
1056 | } | |
1057 | if (upcall->type == DPIF_UC_ACTION) { | |
1058 | pin.send_len = MIN(pin.send_len, upcall->userdata); | |
1059 | } | |
1060 | ||
1061 | /* Make OFPT_PACKET_IN and hand over to packet scheduler. It might | |
1062 | * immediately call into do_send_packet_in() or it might buffer it for a | |
1063 | * while (until a later call to pinsched_run()). */ | |
1064 | pinsched_send(ofconn->schedulers[upcall->type == DPIF_UC_MISS ? 0 : 1], | |
1065 | flow->in_port, ofputil_encode_packet_in(&pin, rw_packet), | |
1066 | do_send_packet_in, ofconn); | |
1067 | } | |
1068 | \f | |
1069 | /* Fail-open settings. */ | |
1070 | ||
1071 | /* Returns the failure handling mode (OFPROTO_FAIL_SECURE or | |
1072 | * OFPROTO_FAIL_STANDALONE) for 'mgr'. */ | |
1073 | enum ofproto_fail_mode | |
1074 | connmgr_get_fail_mode(const struct connmgr *mgr) | |
1075 | { | |
1076 | return mgr->fail_mode; | |
1077 | } | |
1078 | ||
1079 | /* Sets the failure handling mode for 'mgr' to 'fail_mode' (either | |
1080 | * OFPROTO_FAIL_SECURE or OFPROTO_FAIL_STANDALONE). */ | |
1081 | void | |
1082 | connmgr_set_fail_mode(struct connmgr *mgr, enum ofproto_fail_mode fail_mode) | |
1083 | { | |
1084 | mgr->fail_mode = fail_mode; | |
1085 | update_fail_open(mgr); | |
1086 | } | |
1087 | \f | |
1088 | /* Fail-open implementation. */ | |
1089 | ||
1090 | /* Returns the longest probe interval among the primary controllers configured | |
1091 | * on 'mgr'. Returns 0 if there are no primary controllers. */ | |
1092 | int | |
1093 | connmgr_get_max_probe_interval(const struct connmgr *mgr) | |
1094 | { | |
1095 | const struct ofconn *ofconn; | |
1096 | int max_probe_interval; | |
1097 | ||
1098 | max_probe_interval = 0; | |
1099 | HMAP_FOR_EACH (ofconn, hmap_node, &mgr->controllers) { | |
1100 | int probe_interval = rconn_get_probe_interval(ofconn->rconn); | |
1101 | max_probe_interval = MAX(max_probe_interval, probe_interval); | |
1102 | } | |
1103 | return max_probe_interval; | |
1104 | } | |
1105 | ||
1106 | /* Returns the number of seconds for which all of 'mgr's primary controllers | |
1107 | * have been disconnected. Returns 0 if 'mgr' has no primary controllers. */ | |
1108 | int | |
1109 | connmgr_failure_duration(const struct connmgr *mgr) | |
1110 | { | |
1111 | const struct ofconn *ofconn; | |
1112 | int min_failure_duration; | |
1113 | ||
1114 | if (!connmgr_has_controllers(mgr)) { | |
1115 | return 0; | |
1116 | } | |
1117 | ||
1118 | min_failure_duration = INT_MAX; | |
1119 | HMAP_FOR_EACH (ofconn, hmap_node, &mgr->controllers) { | |
1120 | int failure_duration = rconn_failure_duration(ofconn->rconn); | |
1121 | min_failure_duration = MIN(min_failure_duration, failure_duration); | |
1122 | } | |
1123 | return min_failure_duration; | |
1124 | } | |
1125 | ||
1126 | /* Returns true if at least one primary controller is connected (regardless of | |
1127 | * whether those controllers are believed to have authenticated and accepted | |
1128 | * this switch), false if none of them are connected. */ | |
1129 | bool | |
1130 | connmgr_is_any_controller_connected(const struct connmgr *mgr) | |
1131 | { | |
1132 | const struct ofconn *ofconn; | |
1133 | ||
1134 | HMAP_FOR_EACH (ofconn, hmap_node, &mgr->controllers) { | |
1135 | if (rconn_is_connected(ofconn->rconn)) { | |
1136 | return true; | |
1137 | } | |
1138 | } | |
1139 | return false; | |
1140 | } | |
1141 | ||
1142 | /* Returns true if at least one primary controller is believed to have | |
1143 | * authenticated and accepted this switch, false otherwise. */ | |
1144 | bool | |
1145 | connmgr_is_any_controller_admitted(const struct connmgr *mgr) | |
1146 | { | |
1147 | const struct ofconn *ofconn; | |
1148 | ||
1149 | HMAP_FOR_EACH (ofconn, hmap_node, &mgr->controllers) { | |
1150 | if (rconn_is_admitted(ofconn->rconn)) { | |
1151 | return true; | |
1152 | } | |
1153 | } | |
1154 | return false; | |
1155 | } | |
1156 | ||
1157 | /* Sends 'packet' to each controller connected to 'mgr'. Takes ownership of | |
1158 | * 'packet'. */ | |
1159 | void | |
1160 | connmgr_broadcast(struct connmgr *mgr, struct ofpbuf *packet) | |
1161 | { | |
1162 | struct ofconn *ofconn, *prev; | |
1163 | ||
1164 | prev = NULL; | |
1165 | LIST_FOR_EACH (ofconn, node, &mgr->all_conns) { | |
1166 | if (prev) { | |
1167 | ofconn_send_reply(ofconn, ofpbuf_clone(packet)); | |
1168 | } | |
1169 | if (rconn_is_connected(ofconn->rconn)) { | |
1170 | prev = ofconn; | |
1171 | } | |
1172 | } | |
1173 | if (prev) { | |
2e2dd32b | 1174 | ofconn_send_reply(prev, packet); |
19a87e36 BP |
1175 | } else { |
1176 | ofpbuf_delete(packet); | |
1177 | } | |
1178 | } | |
1179 | \f | |
1180 | /* In-band configuration. */ | |
1181 | ||
1182 | static bool any_extras_changed(const struct connmgr *, | |
1183 | const struct sockaddr_in *extras, size_t n); | |
1184 | ||
1185 | /* Sets the 'n' TCP port addresses in 'extras' as ones to which 'mgr''s | |
1186 | * in-band control should guarantee access, in the same way that in-band | |
1187 | * control guarantees access to OpenFlow controllers. */ | |
1188 | void | |
1189 | connmgr_set_extra_in_band_remotes(struct connmgr *mgr, | |
1190 | const struct sockaddr_in *extras, size_t n) | |
1191 | { | |
1192 | if (!any_extras_changed(mgr, extras, n)) { | |
1193 | return; | |
1194 | } | |
1195 | ||
1196 | free(mgr->extra_in_band_remotes); | |
1197 | mgr->n_extra_remotes = n; | |
1198 | mgr->extra_in_band_remotes = xmemdup(extras, n * sizeof *extras); | |
1199 | ||
1200 | update_in_band_remotes(mgr); | |
1201 | } | |
1202 | ||
1203 | /* Sets the OpenFlow queue used by flows set up by in-band control on | |
1204 | * 'mgr' to 'queue_id'. If 'queue_id' is negative, then in-band control | |
1205 | * flows will use the default queue. */ | |
1206 | void | |
1207 | connmgr_set_in_band_queue(struct connmgr *mgr, int queue_id) | |
1208 | { | |
1209 | if (queue_id != mgr->in_band_queue) { | |
1210 | mgr->in_band_queue = queue_id; | |
1211 | update_in_band_remotes(mgr); | |
1212 | } | |
1213 | } | |
1214 | ||
1215 | static bool | |
1216 | any_extras_changed(const struct connmgr *mgr, | |
1217 | const struct sockaddr_in *extras, size_t n) | |
1218 | { | |
1219 | size_t i; | |
1220 | ||
1221 | if (n != mgr->n_extra_remotes) { | |
1222 | return true; | |
1223 | } | |
1224 | ||
1225 | for (i = 0; i < n; i++) { | |
1226 | const struct sockaddr_in *old = &mgr->extra_in_band_remotes[i]; | |
1227 | const struct sockaddr_in *new = &extras[i]; | |
1228 | ||
1229 | if (old->sin_addr.s_addr != new->sin_addr.s_addr || | |
1230 | old->sin_port != new->sin_port) { | |
1231 | return true; | |
1232 | } | |
1233 | } | |
1234 | ||
1235 | return false; | |
1236 | } | |
1237 | \f | |
1238 | /* In-band implementation. */ | |
1239 | ||
1240 | bool | |
1241 | connmgr_msg_in_hook(struct connmgr *mgr, const struct flow *flow, | |
1242 | const struct ofpbuf *packet) | |
1243 | { | |
1244 | return mgr->in_band && in_band_msg_in_hook(mgr->in_band, flow, packet); | |
1245 | } | |
1246 | ||
1247 | bool | |
1248 | connmgr_may_set_up_flow(struct connmgr *mgr, const struct flow *flow, | |
1249 | const struct nlattr *odp_actions, | |
1250 | size_t actions_len) | |
1251 | { | |
1252 | return !mgr->in_band || in_band_rule_check(flow, odp_actions, actions_len); | |
1253 | } | |
1254 | \f | |
1255 | /* Fail-open and in-band implementation. */ | |
1256 | ||
1257 | /* Called by 'ofproto' after all flows have been flushed, to allow fail-open | |
1258 | * and in-band control to re-create their flows. */ | |
1259 | void | |
1260 | connmgr_flushed(struct connmgr *mgr) | |
1261 | { | |
1262 | if (mgr->in_band) { | |
1263 | in_band_flushed(mgr->in_band); | |
1264 | } | |
1265 | if (mgr->fail_open) { | |
1266 | fail_open_flushed(mgr->fail_open); | |
1267 | } | |
1268 | } | |
1269 | \f | |
1270 | /* Creates a new ofservice for 'target' in 'mgr'. Returns 0 if successful, | |
1271 | * otherwise a positive errno value. | |
1272 | * | |
1273 | * ofservice_reconfigure() must be called to fully configure the new | |
1274 | * ofservice. */ | |
1275 | static int | |
1276 | ofservice_create(struct connmgr *mgr, const char *target) | |
1277 | { | |
1278 | struct ofservice *ofservice; | |
1279 | struct pvconn *pvconn; | |
1280 | int error; | |
1281 | ||
1282 | error = pvconn_open(target, &pvconn); | |
1283 | if (error) { | |
1284 | return error; | |
1285 | } | |
1286 | ||
1287 | ofservice = xzalloc(sizeof *ofservice); | |
1288 | hmap_insert(&mgr->services, &ofservice->node, hash_string(target, 0)); | |
1289 | ofservice->pvconn = pvconn; | |
1290 | ||
1291 | return 0; | |
1292 | } | |
1293 | ||
1294 | static void | |
1295 | ofservice_destroy(struct connmgr *mgr, struct ofservice *ofservice) | |
1296 | { | |
1297 | hmap_remove(&mgr->services, &ofservice->node); | |
1298 | pvconn_close(ofservice->pvconn); | |
1299 | free(ofservice); | |
1300 | } | |
1301 | ||
1302 | static void | |
1303 | ofservice_reconfigure(struct ofservice *ofservice, | |
1304 | const struct ofproto_controller *c) | |
1305 | { | |
1306 | ofservice->probe_interval = c->probe_interval; | |
1307 | ofservice->rate_limit = c->rate_limit; | |
1308 | ofservice->burst_limit = c->burst_limit; | |
1309 | } | |
1310 | ||
1311 | /* Finds and returns the ofservice within 'mgr' that has the given | |
1312 | * 'target', or a null pointer if none exists. */ | |
1313 | static struct ofservice * | |
1314 | ofservice_lookup(struct connmgr *mgr, const char *target) | |
1315 | { | |
1316 | struct ofservice *ofservice; | |
1317 | ||
1318 | HMAP_FOR_EACH_WITH_HASH (ofservice, node, hash_string(target, 0), | |
1319 | &mgr->services) { | |
1320 | if (!strcmp(pvconn_get_name(ofservice->pvconn), target)) { | |
1321 | return ofservice; | |
1322 | } | |
1323 | } | |
1324 | return NULL; | |
1325 | } |