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19a87e36 | 1 | /* |
c4b31872 | 2 | * Copyright (c) 2009, 2010, 2011, 2012 Nicira Networks. |
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" | |
5bd31620 | 36 | #include "stream.h" |
19a87e36 BP |
37 | #include "timeval.h" |
38 | #include "vconn.h" | |
39 | #include "vlog.h" | |
40 | ||
41 | VLOG_DEFINE_THIS_MODULE(connmgr); | |
42 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
43 | ||
19a87e36 BP |
44 | /* An OpenFlow connection. */ |
45 | struct ofconn { | |
c4b31872 BP |
46 | /* Configuration that persists from one connection to the next. */ |
47 | ||
19a87e36 | 48 | struct list node; /* In struct connmgr's "all_conns" list. */ |
c4b31872 BP |
49 | struct hmap_node hmap_node; /* In struct connmgr's "controllers" map. */ |
50 | ||
51 | struct connmgr *connmgr; /* Connection's manager. */ | |
19a87e36 BP |
52 | struct rconn *rconn; /* OpenFlow connection. */ |
53 | enum ofconn_type type; /* Type. */ | |
c4b31872 | 54 | enum ofproto_band band; /* In-band or out-of-band? */ |
9886b662 | 55 | bool enable_async_msgs; /* Initially enable async messages? */ |
c4b31872 BP |
56 | |
57 | /* State that should be cleared from one connection to the next. */ | |
58 | ||
59 | /* OpenFlow state. */ | |
60 | enum nx_role role; /* Role. */ | |
19a87e36 | 61 | enum nx_flow_format flow_format; /* Currently selected flow format. */ |
54834960 | 62 | enum nx_packet_in_format packet_in_format; /* OFPT_PACKET_IN format. */ |
6c1491fb | 63 | bool flow_mod_table_id; /* NXT_FLOW_MOD_TABLE_ID enabled? */ |
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? */ |
19a87e36 BP |
126 | }; |
127 | ||
128 | static void ofservice_reconfigure(struct ofservice *, | |
129 | const struct ofproto_controller *); | |
130 | static int ofservice_create(struct connmgr *, const char *target); | |
131 | static void ofservice_destroy(struct connmgr *, struct ofservice *); | |
132 | static struct ofservice *ofservice_lookup(struct connmgr *, | |
133 | const char *target); | |
134 | ||
135 | /* Connection manager for an OpenFlow switch. */ | |
136 | struct connmgr { | |
137 | struct ofproto *ofproto; | |
138 | char *name; | |
139 | char *local_port_name; | |
140 | ||
141 | /* OpenFlow connections. */ | |
142 | struct hmap controllers; /* Controller "struct ofconn"s. */ | |
143 | struct list all_conns; /* Contains "struct ofconn"s. */ | |
144 | ||
145 | /* OpenFlow listeners. */ | |
146 | struct hmap services; /* Contains "struct ofservice"s. */ | |
147 | struct pvconn **snoops; | |
148 | size_t n_snoops; | |
149 | ||
150 | /* Fail open. */ | |
151 | struct fail_open *fail_open; | |
152 | enum ofproto_fail_mode fail_mode; | |
153 | ||
154 | /* In-band control. */ | |
155 | struct in_band *in_band; | |
19a87e36 BP |
156 | struct sockaddr_in *extra_in_band_remotes; |
157 | size_t n_extra_remotes; | |
158 | int in_band_queue; | |
159 | }; | |
160 | ||
161 | static void update_in_band_remotes(struct connmgr *); | |
162 | static void add_snooper(struct connmgr *, struct vconn *); | |
163 | ||
164 | /* Creates and returns a new connection manager owned by 'ofproto'. 'name' is | |
165 | * a name for the ofproto suitable for using in log messages. | |
166 | * 'local_port_name' is the name of the local port (OFPP_LOCAL) within | |
167 | * 'ofproto'. */ | |
168 | struct connmgr * | |
169 | connmgr_create(struct ofproto *ofproto, | |
170 | const char *name, const char *local_port_name) | |
171 | { | |
172 | struct connmgr *mgr; | |
173 | ||
174 | mgr = xmalloc(sizeof *mgr); | |
175 | mgr->ofproto = ofproto; | |
176 | mgr->name = xstrdup(name); | |
177 | mgr->local_port_name = xstrdup(local_port_name); | |
178 | ||
179 | hmap_init(&mgr->controllers); | |
180 | list_init(&mgr->all_conns); | |
181 | ||
182 | hmap_init(&mgr->services); | |
183 | mgr->snoops = NULL; | |
184 | mgr->n_snoops = 0; | |
185 | ||
186 | mgr->fail_open = NULL; | |
187 | mgr->fail_mode = OFPROTO_FAIL_SECURE; | |
188 | ||
189 | mgr->in_band = NULL; | |
19a87e36 BP |
190 | mgr->extra_in_band_remotes = NULL; |
191 | mgr->n_extra_remotes = 0; | |
192 | mgr->in_band_queue = -1; | |
193 | ||
194 | return mgr; | |
195 | } | |
196 | ||
197 | /* Frees 'mgr' and all of its resources. */ | |
198 | void | |
199 | connmgr_destroy(struct connmgr *mgr) | |
200 | { | |
201 | struct ofservice *ofservice, *next_ofservice; | |
202 | struct ofconn *ofconn, *next_ofconn; | |
203 | size_t i; | |
204 | ||
205 | if (!mgr) { | |
206 | return; | |
207 | } | |
208 | ||
209 | LIST_FOR_EACH_SAFE (ofconn, next_ofconn, node, &mgr->all_conns) { | |
210 | ofconn_destroy(ofconn); | |
211 | } | |
212 | hmap_destroy(&mgr->controllers); | |
213 | ||
214 | HMAP_FOR_EACH_SAFE (ofservice, next_ofservice, node, &mgr->services) { | |
215 | ofservice_destroy(mgr, ofservice); | |
216 | } | |
217 | hmap_destroy(&mgr->services); | |
218 | ||
219 | for (i = 0; i < mgr->n_snoops; i++) { | |
220 | pvconn_close(mgr->snoops[i]); | |
221 | } | |
222 | free(mgr->snoops); | |
223 | ||
224 | fail_open_destroy(mgr->fail_open); | |
225 | mgr->fail_open = NULL; | |
226 | ||
227 | in_band_destroy(mgr->in_band); | |
228 | mgr->in_band = NULL; | |
229 | free(mgr->extra_in_band_remotes); | |
230 | free(mgr->name); | |
231 | free(mgr->local_port_name); | |
232 | ||
233 | free(mgr); | |
234 | } | |
235 | ||
7ee20df1 BP |
236 | /* Does all of the periodic maintenance required by 'mgr'. |
237 | * | |
238 | * If 'handle_openflow' is nonnull, calls 'handle_openflow' for each message | |
239 | * received on an OpenFlow connection, passing along the OpenFlow connection | |
240 | * itself and the message that was sent. If 'handle_openflow' returns true, | |
241 | * the message is considered to be fully processed. If 'handle_openflow' | |
242 | * returns false, the message is considered not to have been processed at all; | |
243 | * it will be stored and re-presented to 'handle_openflow' following the next | |
244 | * call to connmgr_retry(). 'handle_openflow' must not modify or free the | |
245 | * message. | |
246 | * | |
247 | * If 'handle_openflow' is NULL, no OpenFlow messages will be processed and | |
248 | * other activities that could affect the flow table (in-band processing, | |
249 | * fail-open processing) are suppressed too. */ | |
19a87e36 BP |
250 | void |
251 | connmgr_run(struct connmgr *mgr, | |
7ee20df1 | 252 | bool (*handle_openflow)(struct ofconn *, struct ofpbuf *ofp_msg)) |
19a87e36 BP |
253 | { |
254 | struct ofconn *ofconn, *next_ofconn; | |
255 | struct ofservice *ofservice; | |
256 | size_t i; | |
257 | ||
7ee20df1 | 258 | if (handle_openflow && mgr->in_band) { |
6da1e809 BP |
259 | if (!in_band_run(mgr->in_band)) { |
260 | in_band_destroy(mgr->in_band); | |
261 | mgr->in_band = NULL; | |
262 | } | |
19a87e36 BP |
263 | } |
264 | ||
265 | LIST_FOR_EACH_SAFE (ofconn, next_ofconn, node, &mgr->all_conns) { | |
266 | ofconn_run(ofconn, handle_openflow); | |
267 | } | |
268 | ||
269 | /* Fail-open maintenance. Do this after processing the ofconns since | |
270 | * fail-open checks the status of the controller rconn. */ | |
7ee20df1 | 271 | if (handle_openflow && mgr->fail_open) { |
19a87e36 BP |
272 | fail_open_run(mgr->fail_open); |
273 | } | |
274 | ||
275 | HMAP_FOR_EACH (ofservice, node, &mgr->services) { | |
276 | struct vconn *vconn; | |
277 | int retval; | |
278 | ||
279 | retval = pvconn_accept(ofservice->pvconn, OFP_VERSION, &vconn); | |
280 | if (!retval) { | |
281 | struct rconn *rconn; | |
282 | char *name; | |
283 | ||
284 | rconn = rconn_create(ofservice->probe_interval, 0); | |
285 | name = ofconn_make_name(mgr, vconn_get_name(vconn)); | |
286 | rconn_connect_unreliably(rconn, vconn, name); | |
287 | free(name); | |
288 | ||
9886b662 BP |
289 | ofconn = ofconn_create(mgr, rconn, OFCONN_SERVICE, |
290 | ofservice->enable_async_msgs); | |
19a87e36 BP |
291 | ofconn_set_rate_limit(ofconn, ofservice->rate_limit, |
292 | ofservice->burst_limit); | |
293 | } else if (retval != EAGAIN) { | |
294 | VLOG_WARN_RL(&rl, "accept failed (%s)", strerror(retval)); | |
295 | } | |
296 | } | |
297 | ||
298 | for (i = 0; i < mgr->n_snoops; i++) { | |
299 | struct vconn *vconn; | |
300 | int retval; | |
301 | ||
302 | retval = pvconn_accept(mgr->snoops[i], OFP_VERSION, &vconn); | |
303 | if (!retval) { | |
304 | add_snooper(mgr, vconn); | |
305 | } else if (retval != EAGAIN) { | |
306 | VLOG_WARN_RL(&rl, "accept failed (%s)", strerror(retval)); | |
307 | } | |
308 | } | |
309 | } | |
310 | ||
7ee20df1 BP |
311 | /* Causes the poll loop to wake up when connmgr_run() needs to run. |
312 | * | |
313 | * If 'handling_openflow' is true, arriving OpenFlow messages and other | |
314 | * activities that affect the flow table will wake up the poll loop. If | |
315 | * 'handling_openflow' is false, they will not. */ | |
19a87e36 | 316 | void |
7ee20df1 | 317 | connmgr_wait(struct connmgr *mgr, bool handling_openflow) |
19a87e36 BP |
318 | { |
319 | struct ofservice *ofservice; | |
320 | struct ofconn *ofconn; | |
321 | size_t i; | |
322 | ||
323 | LIST_FOR_EACH (ofconn, node, &mgr->all_conns) { | |
7ee20df1 | 324 | ofconn_wait(ofconn, handling_openflow); |
19a87e36 | 325 | } |
7ee20df1 | 326 | if (handling_openflow && mgr->in_band) { |
19a87e36 BP |
327 | in_band_wait(mgr->in_band); |
328 | } | |
7ee20df1 | 329 | if (handling_openflow && mgr->fail_open) { |
19a87e36 BP |
330 | fail_open_wait(mgr->fail_open); |
331 | } | |
332 | HMAP_FOR_EACH (ofservice, node, &mgr->services) { | |
333 | pvconn_wait(ofservice->pvconn); | |
334 | } | |
335 | for (i = 0; i < mgr->n_snoops; i++) { | |
336 | pvconn_wait(mgr->snoops[i]); | |
337 | } | |
338 | } | |
339 | ||
340 | /* Returns the ofproto that owns 'ofconn''s connmgr. */ | |
341 | struct ofproto * | |
342 | ofconn_get_ofproto(const struct ofconn *ofconn) | |
343 | { | |
344 | return ofconn->connmgr->ofproto; | |
345 | } | |
7ee20df1 BP |
346 | |
347 | /* If processing of OpenFlow messages was blocked on any 'mgr' ofconns by | |
348 | * returning false to the 'handle_openflow' callback to connmgr_run(), this | |
349 | * re-enables them. */ | |
350 | void | |
351 | connmgr_retry(struct connmgr *mgr) | |
352 | { | |
353 | struct ofconn *ofconn; | |
354 | ||
355 | LIST_FOR_EACH (ofconn, node, &mgr->all_conns) { | |
356 | ofconn->retry = true; | |
357 | } | |
358 | } | |
19a87e36 BP |
359 | \f |
360 | /* OpenFlow configuration. */ | |
361 | ||
362 | static void add_controller(struct connmgr *, const char *target); | |
363 | static struct ofconn *find_controller_by_target(struct connmgr *, | |
364 | const char *target); | |
365 | static void update_fail_open(struct connmgr *); | |
366 | static int set_pvconns(struct pvconn ***pvconnsp, size_t *n_pvconnsp, | |
81e2083f | 367 | const struct sset *); |
19a87e36 BP |
368 | |
369 | /* Returns true if 'mgr' has any configured primary controllers. | |
370 | * | |
371 | * Service controllers do not count, but configured primary controllers do | |
372 | * count whether or not they are currently connected. */ | |
373 | bool | |
374 | connmgr_has_controllers(const struct connmgr *mgr) | |
375 | { | |
376 | return !hmap_is_empty(&mgr->controllers); | |
377 | } | |
378 | ||
379 | /* Initializes 'info' and populates it with information about each configured | |
380 | * primary controller. The keys in 'info' are the controllers' targets; the | |
381 | * data values are corresponding "struct ofproto_controller_info". | |
382 | * | |
383 | * The caller owns 'info' and everything in it and should free it when it is no | |
384 | * longer needed. */ | |
385 | void | |
386 | connmgr_get_controller_info(struct connmgr *mgr, struct shash *info) | |
387 | { | |
388 | const struct ofconn *ofconn; | |
389 | ||
19a87e36 BP |
390 | HMAP_FOR_EACH (ofconn, hmap_node, &mgr->controllers) { |
391 | const struct rconn *rconn = ofconn->rconn; | |
5d279086 | 392 | const char *target = rconn_get_target(rconn); |
19a87e36 | 393 | |
5d279086 AE |
394 | if (!shash_find(info, target)) { |
395 | struct ofproto_controller_info *cinfo = xmalloc(sizeof *cinfo); | |
396 | time_t now = time_now(); | |
397 | time_t last_connection = rconn_get_last_connection(rconn); | |
398 | time_t last_disconnect = rconn_get_last_disconnect(rconn); | |
399 | int last_error = rconn_get_last_error(rconn); | |
19a87e36 | 400 | |
5d279086 | 401 | shash_add(info, target, cinfo); |
19a87e36 | 402 | |
5d279086 AE |
403 | cinfo->is_connected = rconn_is_connected(rconn); |
404 | cinfo->role = ofconn->role; | |
19a87e36 | 405 | |
5d279086 | 406 | cinfo->pairs.n = 0; |
19a87e36 | 407 | |
5d279086 AE |
408 | if (last_error) { |
409 | cinfo->pairs.keys[cinfo->pairs.n] = "last_error"; | |
410 | cinfo->pairs.values[cinfo->pairs.n++] | |
411 | = xstrdup(ovs_retval_to_string(last_error)); | |
412 | } | |
19a87e36 | 413 | |
5d279086 | 414 | cinfo->pairs.keys[cinfo->pairs.n] = "state"; |
19a87e36 | 415 | cinfo->pairs.values[cinfo->pairs.n++] |
5d279086 AE |
416 | = xstrdup(rconn_get_state(rconn)); |
417 | ||
418 | if (last_connection != TIME_MIN) { | |
419 | cinfo->pairs.keys[cinfo->pairs.n] = "sec_since_connect"; | |
420 | cinfo->pairs.values[cinfo->pairs.n++] | |
421 | = xasprintf("%ld", (long int) (now - last_connection)); | |
422 | } | |
423 | ||
424 | if (last_disconnect != TIME_MIN) { | |
425 | cinfo->pairs.keys[cinfo->pairs.n] = "sec_since_disconnect"; | |
426 | cinfo->pairs.values[cinfo->pairs.n++] | |
427 | = xasprintf("%ld", (long int) (now - last_disconnect)); | |
428 | } | |
19a87e36 BP |
429 | } |
430 | } | |
431 | } | |
432 | ||
72ba2ed3 AE |
433 | void |
434 | connmgr_free_controller_info(struct shash *info) | |
435 | { | |
436 | struct shash_node *node; | |
437 | ||
438 | SHASH_FOR_EACH (node, info) { | |
439 | struct ofproto_controller_info *cinfo = node->data; | |
440 | while (cinfo->pairs.n) { | |
441 | free((char *) cinfo->pairs.values[--cinfo->pairs.n]); | |
442 | } | |
443 | free(cinfo); | |
444 | } | |
445 | shash_destroy(info); | |
446 | } | |
447 | ||
19a87e36 BP |
448 | /* Changes 'mgr''s set of controllers to the 'n_controllers' controllers in |
449 | * 'controllers'. */ | |
450 | void | |
451 | connmgr_set_controllers(struct connmgr *mgr, | |
452 | const struct ofproto_controller *controllers, | |
453 | size_t n_controllers) | |
454 | { | |
08fd19f0 | 455 | bool had_controllers = connmgr_has_controllers(mgr); |
19a87e36 BP |
456 | struct shash new_controllers; |
457 | struct ofconn *ofconn, *next_ofconn; | |
458 | struct ofservice *ofservice, *next_ofservice; | |
19a87e36 BP |
459 | size_t i; |
460 | ||
461 | /* Create newly configured controllers and services. | |
462 | * Create a name to ofproto_controller mapping in 'new_controllers'. */ | |
463 | shash_init(&new_controllers); | |
464 | for (i = 0; i < n_controllers; i++) { | |
465 | const struct ofproto_controller *c = &controllers[i]; | |
466 | ||
467 | if (!vconn_verify_name(c->target)) { | |
468 | if (!find_controller_by_target(mgr, c->target)) { | |
469 | add_controller(mgr, c->target); | |
470 | } | |
471 | } else if (!pvconn_verify_name(c->target)) { | |
472 | if (!ofservice_lookup(mgr, c->target)) { | |
473 | ofservice_create(mgr, c->target); | |
474 | } | |
475 | } else { | |
476 | VLOG_WARN_RL(&rl, "%s: unsupported controller \"%s\"", | |
477 | mgr->name, c->target); | |
478 | continue; | |
479 | } | |
480 | ||
481 | shash_add_once(&new_controllers, c->target, &controllers[i]); | |
482 | } | |
483 | ||
484 | /* Delete controllers that are no longer configured. | |
485 | * Update configuration of all now-existing controllers. */ | |
19a87e36 BP |
486 | HMAP_FOR_EACH_SAFE (ofconn, next_ofconn, hmap_node, &mgr->controllers) { |
487 | struct ofproto_controller *c; | |
488 | ||
489 | c = shash_find_data(&new_controllers, ofconn_get_target(ofconn)); | |
490 | if (!c) { | |
491 | ofconn_destroy(ofconn); | |
492 | } else { | |
493 | ofconn_reconfigure(ofconn, c); | |
494 | } | |
495 | } | |
496 | ||
497 | /* Delete services that are no longer configured. | |
498 | * Update configuration of all now-existing services. */ | |
499 | HMAP_FOR_EACH_SAFE (ofservice, next_ofservice, node, &mgr->services) { | |
500 | struct ofproto_controller *c; | |
501 | ||
502 | c = shash_find_data(&new_controllers, | |
503 | pvconn_get_name(ofservice->pvconn)); | |
504 | if (!c) { | |
505 | ofservice_destroy(mgr, ofservice); | |
506 | } else { | |
507 | ofservice_reconfigure(ofservice, c); | |
508 | } | |
509 | } | |
510 | ||
511 | shash_destroy(&new_controllers); | |
512 | ||
513 | update_in_band_remotes(mgr); | |
514 | update_fail_open(mgr); | |
08fd19f0 BP |
515 | if (had_controllers != connmgr_has_controllers(mgr)) { |
516 | ofproto_flush_flows(mgr->ofproto); | |
517 | } | |
19a87e36 BP |
518 | } |
519 | ||
520 | /* Drops the connections between 'mgr' and all of its primary and secondary | |
521 | * controllers, forcing them to reconnect. */ | |
522 | void | |
523 | connmgr_reconnect(const struct connmgr *mgr) | |
524 | { | |
525 | struct ofconn *ofconn; | |
526 | ||
527 | LIST_FOR_EACH (ofconn, node, &mgr->all_conns) { | |
528 | rconn_reconnect(ofconn->rconn); | |
529 | } | |
530 | } | |
531 | ||
532 | /* Sets the "snoops" for 'mgr' to the pvconn targets listed in 'snoops'. | |
533 | * | |
534 | * A "snoop" is a pvconn to which every OpenFlow message to or from the most | |
535 | * important controller on 'mgr' is mirrored. */ | |
536 | int | |
81e2083f | 537 | connmgr_set_snoops(struct connmgr *mgr, const struct sset *snoops) |
19a87e36 BP |
538 | { |
539 | return set_pvconns(&mgr->snoops, &mgr->n_snoops, snoops); | |
540 | } | |
541 | ||
542 | /* Adds each of the snoops currently configured on 'mgr' to 'snoops'. */ | |
543 | void | |
81e2083f | 544 | connmgr_get_snoops(const struct connmgr *mgr, struct sset *snoops) |
19a87e36 BP |
545 | { |
546 | size_t i; | |
547 | ||
548 | for (i = 0; i < mgr->n_snoops; i++) { | |
81e2083f | 549 | sset_add(snoops, pvconn_get_name(mgr->snoops[i])); |
19a87e36 BP |
550 | } |
551 | } | |
552 | ||
81e2083f BP |
553 | /* Returns true if 'mgr' has at least one snoop, false if it has none. */ |
554 | bool | |
555 | connmgr_has_snoops(const struct connmgr *mgr) | |
556 | { | |
557 | return mgr->n_snoops > 0; | |
558 | } | |
559 | ||
19a87e36 BP |
560 | /* Creates a new controller for 'target' in 'mgr'. update_controller() needs |
561 | * to be called later to finish the new ofconn's configuration. */ | |
562 | static void | |
563 | add_controller(struct connmgr *mgr, const char *target) | |
564 | { | |
565 | char *name = ofconn_make_name(mgr, target); | |
566 | struct ofconn *ofconn; | |
567 | ||
9886b662 | 568 | ofconn = ofconn_create(mgr, rconn_create(5, 8), OFCONN_PRIMARY, true); |
19a87e36 | 569 | ofconn->pktbuf = pktbuf_create(); |
19a87e36 BP |
570 | rconn_connect(ofconn->rconn, target, name); |
571 | hmap_insert(&mgr->controllers, &ofconn->hmap_node, hash_string(target, 0)); | |
572 | ||
573 | free(name); | |
574 | } | |
575 | ||
576 | static struct ofconn * | |
577 | find_controller_by_target(struct connmgr *mgr, const char *target) | |
578 | { | |
579 | struct ofconn *ofconn; | |
580 | ||
581 | HMAP_FOR_EACH_WITH_HASH (ofconn, hmap_node, | |
582 | hash_string(target, 0), &mgr->controllers) { | |
583 | if (!strcmp(ofconn_get_target(ofconn), target)) { | |
584 | return ofconn; | |
585 | } | |
586 | } | |
587 | return NULL; | |
588 | } | |
589 | ||
590 | static void | |
591 | update_in_band_remotes(struct connmgr *mgr) | |
592 | { | |
593 | struct sockaddr_in *addrs; | |
594 | size_t max_addrs, n_addrs; | |
595 | struct ofconn *ofconn; | |
596 | size_t i; | |
597 | ||
598 | /* Allocate enough memory for as many remotes as we could possibly have. */ | |
599 | max_addrs = mgr->n_extra_remotes + hmap_count(&mgr->controllers); | |
600 | addrs = xmalloc(max_addrs * sizeof *addrs); | |
601 | n_addrs = 0; | |
602 | ||
603 | /* Add all the remotes. */ | |
604 | HMAP_FOR_EACH (ofconn, hmap_node, &mgr->controllers) { | |
605 | struct sockaddr_in *sin = &addrs[n_addrs]; | |
ac4c900d | 606 | const char *target = rconn_get_target(ofconn->rconn); |
19a87e36 BP |
607 | |
608 | if (ofconn->band == OFPROTO_OUT_OF_BAND) { | |
609 | continue; | |
610 | } | |
611 | ||
ac4c900d AA |
612 | if (stream_parse_target_with_default_ports(target, |
613 | OFP_TCP_PORT, | |
614 | OFP_SSL_PORT, | |
615 | sin)) { | |
19a87e36 BP |
616 | n_addrs++; |
617 | } | |
618 | } | |
619 | for (i = 0; i < mgr->n_extra_remotes; i++) { | |
620 | addrs[n_addrs++] = mgr->extra_in_band_remotes[i]; | |
621 | } | |
622 | ||
623 | /* Create or update or destroy in-band. */ | |
624 | if (n_addrs) { | |
625 | if (!mgr->in_band) { | |
626 | in_band_create(mgr->ofproto, mgr->local_port_name, &mgr->in_band); | |
627 | } | |
19a87e36 | 628 | in_band_set_queue(mgr->in_band, mgr->in_band_queue); |
19a87e36 | 629 | } else { |
6da1e809 BP |
630 | /* in_band_run() needs a chance to delete any existing in-band flows. |
631 | * We will destroy mgr->in_band after it's done with that. */ | |
632 | } | |
633 | if (mgr->in_band) { | |
634 | in_band_set_remotes(mgr->in_band, addrs, n_addrs); | |
19a87e36 BP |
635 | } |
636 | ||
637 | /* Clean up. */ | |
638 | free(addrs); | |
639 | } | |
640 | ||
641 | static void | |
642 | update_fail_open(struct connmgr *mgr) | |
643 | { | |
644 | if (connmgr_has_controllers(mgr) | |
645 | && mgr->fail_mode == OFPROTO_FAIL_STANDALONE) { | |
646 | if (!mgr->fail_open) { | |
647 | mgr->fail_open = fail_open_create(mgr->ofproto, mgr); | |
648 | } | |
649 | } else { | |
650 | fail_open_destroy(mgr->fail_open); | |
651 | mgr->fail_open = NULL; | |
652 | } | |
653 | } | |
654 | ||
655 | static int | |
656 | set_pvconns(struct pvconn ***pvconnsp, size_t *n_pvconnsp, | |
81e2083f | 657 | const struct sset *sset) |
19a87e36 BP |
658 | { |
659 | struct pvconn **pvconns = *pvconnsp; | |
660 | size_t n_pvconns = *n_pvconnsp; | |
81e2083f | 661 | const char *name; |
19a87e36 BP |
662 | int retval = 0; |
663 | size_t i; | |
664 | ||
665 | for (i = 0; i < n_pvconns; i++) { | |
666 | pvconn_close(pvconns[i]); | |
667 | } | |
668 | free(pvconns); | |
669 | ||
81e2083f | 670 | pvconns = xmalloc(sset_count(sset) * sizeof *pvconns); |
19a87e36 | 671 | n_pvconns = 0; |
81e2083f | 672 | SSET_FOR_EACH (name, sset) { |
19a87e36 BP |
673 | struct pvconn *pvconn; |
674 | int error; | |
675 | ||
676 | error = pvconn_open(name, &pvconn); | |
677 | if (!error) { | |
678 | pvconns[n_pvconns++] = pvconn; | |
679 | } else { | |
680 | VLOG_ERR("failed to listen on %s: %s", name, strerror(error)); | |
681 | if (!retval) { | |
682 | retval = error; | |
683 | } | |
684 | } | |
685 | } | |
686 | ||
687 | *pvconnsp = pvconns; | |
688 | *n_pvconnsp = n_pvconns; | |
689 | ||
690 | return retval; | |
691 | } | |
692 | ||
693 | /* Returns a "preference level" for snooping 'ofconn'. A higher return value | |
694 | * means that 'ofconn' is more interesting for monitoring than a lower return | |
695 | * value. */ | |
696 | static int | |
697 | snoop_preference(const struct ofconn *ofconn) | |
698 | { | |
699 | switch (ofconn->role) { | |
700 | case NX_ROLE_MASTER: | |
701 | return 3; | |
702 | case NX_ROLE_OTHER: | |
703 | return 2; | |
704 | case NX_ROLE_SLAVE: | |
705 | return 1; | |
706 | default: | |
707 | /* Shouldn't happen. */ | |
708 | return 0; | |
709 | } | |
710 | } | |
711 | ||
712 | /* One of 'mgr''s "snoop" pvconns has accepted a new connection on 'vconn'. | |
713 | * Connects this vconn to a controller. */ | |
714 | static void | |
715 | add_snooper(struct connmgr *mgr, struct vconn *vconn) | |
716 | { | |
717 | struct ofconn *ofconn, *best; | |
718 | ||
719 | /* Pick a controller for monitoring. */ | |
720 | best = NULL; | |
721 | LIST_FOR_EACH (ofconn, node, &mgr->all_conns) { | |
722 | if (ofconn->type == OFCONN_PRIMARY | |
723 | && (!best || snoop_preference(ofconn) > snoop_preference(best))) { | |
724 | best = ofconn; | |
725 | } | |
726 | } | |
727 | ||
728 | if (best) { | |
729 | rconn_add_monitor(best->rconn, vconn); | |
730 | } else { | |
731 | VLOG_INFO_RL(&rl, "no controller connection to snoop"); | |
732 | vconn_close(vconn); | |
733 | } | |
734 | } | |
735 | \f | |
736 | /* Public ofconn functions. */ | |
737 | ||
738 | /* Returns the connection type, either OFCONN_PRIMARY or OFCONN_SERVICE. */ | |
739 | enum ofconn_type | |
740 | ofconn_get_type(const struct ofconn *ofconn) | |
741 | { | |
742 | return ofconn->type; | |
743 | } | |
744 | ||
745 | /* Returns the role configured for 'ofconn'. | |
746 | * | |
747 | * The default role, if no other role has been set, is NX_ROLE_OTHER. */ | |
748 | enum nx_role | |
749 | ofconn_get_role(const struct ofconn *ofconn) | |
750 | { | |
751 | return ofconn->role; | |
752 | } | |
753 | ||
754 | /* Changes 'ofconn''s role to 'role'. If 'role' is NX_ROLE_MASTER then any | |
755 | * existing master is demoted to a slave. */ | |
756 | void | |
757 | ofconn_set_role(struct ofconn *ofconn, enum nx_role role) | |
758 | { | |
759 | if (role == NX_ROLE_MASTER) { | |
760 | struct ofconn *other; | |
761 | ||
762 | HMAP_FOR_EACH (other, hmap_node, &ofconn->connmgr->controllers) { | |
763 | if (other->role == NX_ROLE_MASTER) { | |
764 | other->role = NX_ROLE_SLAVE; | |
765 | } | |
766 | } | |
767 | } | |
768 | ofconn->role = role; | |
769 | } | |
770 | ||
f0fd1a17 | 771 | void |
80d5aefd | 772 | ofconn_set_invalid_ttl_to_controller(struct ofconn *ofconn, bool enable) |
f0fd1a17 | 773 | { |
80d5aefd BP |
774 | uint32_t bit = 1u << OFPR_INVALID_TTL; |
775 | if (enable) { | |
776 | ofconn->master_async_config[OAM_PACKET_IN] |= bit; | |
777 | } else { | |
778 | ofconn->master_async_config[OAM_PACKET_IN] &= ~bit; | |
779 | } | |
f0fd1a17 PS |
780 | } |
781 | ||
782 | bool | |
783 | ofconn_get_invalid_ttl_to_controller(struct ofconn *ofconn) | |
784 | { | |
80d5aefd BP |
785 | uint32_t bit = 1u << OFPR_INVALID_TTL; |
786 | return (ofconn->master_async_config[OAM_PACKET_IN] & bit) != 0; | |
f0fd1a17 PS |
787 | } |
788 | ||
19a87e36 BP |
789 | /* Returns the currently configured flow format for 'ofconn', one of NXFF_*. |
790 | * | |
791 | * The default, if no other format has been set, is NXFF_OPENFLOW10. */ | |
792 | enum nx_flow_format | |
793 | ofconn_get_flow_format(struct ofconn *ofconn) | |
794 | { | |
795 | return ofconn->flow_format; | |
796 | } | |
797 | ||
798 | /* Sets the flow format for 'ofconn' to 'flow_format' (one of NXFF_*). */ | |
799 | void | |
800 | ofconn_set_flow_format(struct ofconn *ofconn, enum nx_flow_format flow_format) | |
801 | { | |
802 | ofconn->flow_format = flow_format; | |
803 | } | |
804 | ||
54834960 EJ |
805 | /* Returns the currently configured packet in format for 'ofconn', one of |
806 | * NXPIF_*. | |
807 | * | |
808 | * The default, if no other format has been set, is NXPIF_OPENFLOW10. */ | |
809 | enum nx_packet_in_format | |
810 | ofconn_get_packet_in_format(struct ofconn *ofconn) | |
811 | { | |
812 | return ofconn->packet_in_format; | |
813 | } | |
814 | ||
815 | /* Sets the packet in format for 'ofconn' to 'packet_in_format' (one of | |
816 | * NXPIF_*). */ | |
817 | void | |
818 | ofconn_set_packet_in_format(struct ofconn *ofconn, | |
819 | enum nx_packet_in_format packet_in_format) | |
820 | { | |
821 | ofconn->packet_in_format = packet_in_format; | |
822 | } | |
823 | ||
a7349929 BP |
824 | /* Sets the controller connection ID for 'ofconn' to 'controller_id'. |
825 | * | |
826 | * The connection controller ID is used for OFPP_CONTROLLER and | |
827 | * NXAST_CONTROLLER actions. See "struct nx_action_controller" for details. */ | |
828 | void | |
829 | ofconn_set_controller_id(struct ofconn *ofconn, uint16_t controller_id) | |
830 | { | |
831 | ofconn->controller_id = controller_id; | |
832 | } | |
833 | ||
6c1491fb BP |
834 | /* Returns true if the NXT_FLOW_MOD_TABLE_ID extension is enabled, false |
835 | * otherwise. | |
836 | * | |
837 | * By default the extension is not enabled. */ | |
838 | bool | |
839 | ofconn_get_flow_mod_table_id(const struct ofconn *ofconn) | |
840 | { | |
841 | return ofconn->flow_mod_table_id; | |
842 | } | |
843 | ||
844 | /* Enables or disables (according to 'enable') the NXT_FLOW_MOD_TABLE_ID | |
845 | * extension on 'ofconn'. */ | |
846 | void | |
847 | ofconn_set_flow_mod_table_id(struct ofconn *ofconn, bool enable) | |
848 | { | |
849 | ofconn->flow_mod_table_id = enable; | |
850 | } | |
851 | ||
19a87e36 BP |
852 | /* Returns the default miss send length for 'ofconn'. */ |
853 | int | |
854 | ofconn_get_miss_send_len(const struct ofconn *ofconn) | |
855 | { | |
856 | return ofconn->miss_send_len; | |
857 | } | |
858 | ||
859 | /* Sets the default miss send length for 'ofconn' to 'miss_send_len'. */ | |
860 | void | |
861 | ofconn_set_miss_send_len(struct ofconn *ofconn, int miss_send_len) | |
862 | { | |
863 | ofconn->miss_send_len = miss_send_len; | |
864 | } | |
865 | ||
80d5aefd BP |
866 | void |
867 | ofconn_set_async_config(struct ofconn *ofconn, | |
868 | const uint32_t master_masks[OAM_N_TYPES], | |
869 | const uint32_t slave_masks[OAM_N_TYPES]) | |
870 | { | |
871 | size_t size = sizeof ofconn->master_async_config; | |
872 | memcpy(ofconn->master_async_config, master_masks, size); | |
873 | memcpy(ofconn->slave_async_config, slave_masks, size); | |
874 | } | |
875 | ||
19a87e36 BP |
876 | /* Sends 'msg' on 'ofconn', accounting it as a reply. (If there is a |
877 | * sufficient number of OpenFlow replies in-flight on a single ofconn, then the | |
878 | * connmgr will stop accepting new OpenFlow requests on that ofconn until the | |
879 | * controller has accepted some of the replies.) */ | |
880 | void | |
881 | ofconn_send_reply(const struct ofconn *ofconn, struct ofpbuf *msg) | |
882 | { | |
883 | ofconn_send(ofconn, msg, ofconn->reply_counter); | |
884 | } | |
885 | ||
63f2140a BP |
886 | /* Sends each of the messages in list 'replies' on 'ofconn' in order, |
887 | * accounting them as replies. */ | |
888 | void | |
889 | ofconn_send_replies(const struct ofconn *ofconn, struct list *replies) | |
890 | { | |
891 | struct ofpbuf *reply, *next; | |
892 | ||
893 | LIST_FOR_EACH_SAFE (reply, next, list_node, replies) { | |
894 | list_remove(&reply->list_node); | |
895 | ofconn_send_reply(ofconn, reply); | |
896 | } | |
897 | } | |
898 | ||
90bf1e07 | 899 | /* Sends 'error' on 'ofconn', as a reply to 'request'. Only at most the |
1be5ff75 BP |
900 | * first 64 bytes of 'request' are used. */ |
901 | void | |
902 | ofconn_send_error(const struct ofconn *ofconn, | |
90bf1e07 | 903 | const struct ofp_header *request, enum ofperr error) |
1be5ff75 | 904 | { |
90bf1e07 | 905 | struct ofpbuf *reply; |
76589937 | 906 | |
90bf1e07 BP |
907 | reply = ofperr_encode_reply(error, request); |
908 | if (reply) { | |
76589937 BP |
909 | static struct vlog_rate_limit err_rl = VLOG_RATE_LIMIT_INIT(10, 10); |
910 | ||
911 | if (!VLOG_DROP_INFO(&err_rl)) { | |
912 | const struct ofputil_msg_type *type; | |
913 | const char *type_name; | |
914 | size_t request_len; | |
76589937 BP |
915 | |
916 | request_len = ntohs(request->length); | |
917 | type_name = (!ofputil_decode_msg_type_partial(request, | |
918 | MIN(64, request_len), | |
919 | &type) | |
920 | ? ofputil_msg_type_name(type) | |
921 | : "invalid"); | |
922 | ||
76589937 | 923 | VLOG_INFO("%s: sending %s error reply to %s message", |
90bf1e07 BP |
924 | rconn_get_name(ofconn->rconn), ofperr_to_string(error), |
925 | type_name); | |
76589937 | 926 | } |
90bf1e07 | 927 | ofconn_send_reply(ofconn, reply); |
1be5ff75 BP |
928 | } |
929 | } | |
930 | ||
19a87e36 | 931 | /* Same as pktbuf_retrieve(), using the pktbuf owned by 'ofconn'. */ |
90bf1e07 | 932 | enum ofperr |
19a87e36 BP |
933 | ofconn_pktbuf_retrieve(struct ofconn *ofconn, uint32_t id, |
934 | struct ofpbuf **bufferp, uint16_t *in_port) | |
935 | { | |
936 | return pktbuf_retrieve(ofconn->pktbuf, id, bufferp, in_port); | |
937 | } | |
7ee20df1 BP |
938 | |
939 | /* Returns true if 'ofconn' has any pending opgroups. */ | |
940 | bool | |
941 | ofconn_has_pending_opgroups(const struct ofconn *ofconn) | |
942 | { | |
943 | return !list_is_empty(&ofconn->opgroups); | |
944 | } | |
945 | ||
7ee20df1 BP |
946 | /* Adds 'ofconn_node' to 'ofconn''s list of pending opgroups. |
947 | * | |
948 | * If 'ofconn' is destroyed or its connection drops, then 'ofconn' will remove | |
949 | * 'ofconn_node' from the list and re-initialize it with list_init(). The | |
950 | * client may, therefore, use list_is_empty(ofconn_node) to determine whether | |
951 | * 'ofconn_node' is still associated with an active ofconn. | |
952 | * | |
953 | * The client may also remove ofconn_node from the list itself, with | |
954 | * list_remove(). */ | |
955 | void | |
956 | ofconn_add_opgroup(struct ofconn *ofconn, struct list *ofconn_node) | |
957 | { | |
958 | list_push_back(&ofconn->opgroups, ofconn_node); | |
959 | } | |
19a87e36 BP |
960 | \f |
961 | /* Private ofconn functions. */ | |
962 | ||
963 | static const char * | |
964 | ofconn_get_target(const struct ofconn *ofconn) | |
965 | { | |
966 | return rconn_get_target(ofconn->rconn); | |
967 | } | |
968 | ||
969 | static struct ofconn * | |
9886b662 BP |
970 | ofconn_create(struct connmgr *mgr, struct rconn *rconn, enum ofconn_type type, |
971 | bool enable_async_msgs) | |
19a87e36 | 972 | { |
c4b31872 BP |
973 | struct ofconn *ofconn; |
974 | ||
975 | ofconn = xzalloc(sizeof *ofconn); | |
19a87e36 BP |
976 | ofconn->connmgr = mgr; |
977 | list_push_back(&mgr->all_conns, &ofconn->node); | |
978 | ofconn->rconn = rconn; | |
979 | ofconn->type = type; | |
9886b662 | 980 | ofconn->enable_async_msgs = enable_async_msgs; |
c4b31872 | 981 | |
7ee20df1 | 982 | list_init(&ofconn->opgroups); |
c4b31872 BP |
983 | |
984 | ofconn_flush(ofconn); | |
985 | ||
19a87e36 BP |
986 | return ofconn; |
987 | } | |
988 | ||
c4b31872 BP |
989 | /* Clears all of the state in 'ofconn' that should not persist from one |
990 | * connection to the next. */ | |
7ee20df1 BP |
991 | static void |
992 | ofconn_flush(struct ofconn *ofconn) | |
993 | { | |
c4b31872 BP |
994 | int i; |
995 | ||
996 | ofconn->role = NX_ROLE_OTHER; | |
997 | ofconn->flow_format = NXFF_OPENFLOW10; | |
998 | ofconn->packet_in_format = NXPIF_OPENFLOW10; | |
999 | ofconn->flow_mod_table_id = false; | |
1000 | ||
1001 | /* Disassociate 'ofconn' from all of the ofopgroups that it initiated that | |
1002 | * have not yet completed. (Those ofopgroups will still run to completion | |
1003 | * in the usual way, but any errors that they run into will not be reported | |
1004 | * on any OpenFlow channel.) | |
1005 | * | |
1006 | * Also discard any blocked operation on 'ofconn'. */ | |
7ee20df1 BP |
1007 | while (!list_is_empty(&ofconn->opgroups)) { |
1008 | list_init(list_pop_front(&ofconn->opgroups)); | |
1009 | } | |
1010 | ofpbuf_delete(ofconn->blocked); | |
1011 | ofconn->blocked = NULL; | |
c4b31872 BP |
1012 | |
1013 | rconn_packet_counter_destroy(ofconn->packet_in_counter); | |
1014 | ofconn->packet_in_counter = rconn_packet_counter_create(); | |
1015 | for (i = 0; i < N_SCHEDULERS; i++) { | |
1016 | if (ofconn->schedulers[i]) { | |
1017 | int rate, burst; | |
1018 | ||
1019 | pinsched_get_limits(ofconn->schedulers[i], &rate, &burst); | |
1020 | pinsched_destroy(ofconn->schedulers[i]); | |
1021 | ofconn->schedulers[i] = pinsched_create(rate, burst); | |
1022 | } | |
1023 | } | |
1024 | if (ofconn->pktbuf) { | |
1025 | pktbuf_destroy(ofconn->pktbuf); | |
1026 | ofconn->pktbuf = pktbuf_create(); | |
1027 | } | |
1028 | ofconn->miss_send_len = (ofconn->type == OFCONN_PRIMARY | |
1029 | ? OFP_DEFAULT_MISS_SEND_LEN | |
1030 | : 0); | |
a7349929 | 1031 | ofconn->controller_id = 0; |
c4b31872 BP |
1032 | |
1033 | rconn_packet_counter_destroy(ofconn->reply_counter); | |
1034 | ofconn->reply_counter = rconn_packet_counter_create(); | |
80d5aefd | 1035 | |
9886b662 BP |
1036 | if (ofconn->enable_async_msgs) { |
1037 | uint32_t *master = ofconn->master_async_config; | |
1038 | uint32_t *slave = ofconn->slave_async_config; | |
1039 | ||
1040 | /* "master" and "other" roles get all asynchronous messages by default, | |
1041 | * except that the controller needs to enable nonstandard "packet-in" | |
1042 | * reasons itself. */ | |
1043 | master[OAM_PACKET_IN] = (1u << OFPR_NO_MATCH) | (1u << OFPR_ACTION); | |
1044 | master[OAM_PORT_STATUS] = ((1u << OFPPR_ADD) | |
1045 | | (1u << OFPPR_DELETE) | |
1046 | | (1u << OFPPR_MODIFY)); | |
1047 | master[OAM_FLOW_REMOVED] = ((1u << OFPRR_IDLE_TIMEOUT) | |
1048 | | (1u << OFPRR_HARD_TIMEOUT) | |
1049 | | (1u << OFPRR_DELETE)); | |
1050 | ||
1051 | /* "slave" role gets port status updates by default. */ | |
1052 | slave[OAM_PACKET_IN] = 0; | |
1053 | slave[OAM_PORT_STATUS] = ((1u << OFPPR_ADD) | |
1054 | | (1u << OFPPR_DELETE) | |
1055 | | (1u << OFPPR_MODIFY)); | |
1056 | slave[OAM_FLOW_REMOVED] = 0; | |
1057 | } else { | |
1058 | memset(ofconn->master_async_config, 0, | |
1059 | sizeof ofconn->master_async_config); | |
1060 | memset(ofconn->slave_async_config, 0, | |
1061 | sizeof ofconn->slave_async_config); | |
1062 | } | |
7ee20df1 BP |
1063 | } |
1064 | ||
19a87e36 BP |
1065 | static void |
1066 | ofconn_destroy(struct ofconn *ofconn) | |
1067 | { | |
7ee20df1 BP |
1068 | ofconn_flush(ofconn); |
1069 | ||
19a87e36 BP |
1070 | if (ofconn->type == OFCONN_PRIMARY) { |
1071 | hmap_remove(&ofconn->connmgr->controllers, &ofconn->hmap_node); | |
1072 | } | |
1073 | ||
1074 | list_remove(&ofconn->node); | |
1075 | rconn_destroy(ofconn->rconn); | |
1076 | rconn_packet_counter_destroy(ofconn->packet_in_counter); | |
1077 | rconn_packet_counter_destroy(ofconn->reply_counter); | |
1078 | pktbuf_destroy(ofconn->pktbuf); | |
1079 | free(ofconn); | |
1080 | } | |
1081 | ||
1082 | /* Reconfigures 'ofconn' to match 'c'. 'ofconn' and 'c' must have the same | |
1083 | * target. */ | |
1084 | static void | |
1085 | ofconn_reconfigure(struct ofconn *ofconn, const struct ofproto_controller *c) | |
1086 | { | |
1087 | int probe_interval; | |
1088 | ||
1089 | ofconn->band = c->band; | |
1090 | ||
1091 | rconn_set_max_backoff(ofconn->rconn, c->max_backoff); | |
1092 | ||
1093 | probe_interval = c->probe_interval ? MAX(c->probe_interval, 5) : 0; | |
1094 | rconn_set_probe_interval(ofconn->rconn, probe_interval); | |
1095 | ||
1096 | ofconn_set_rate_limit(ofconn, c->rate_limit, c->burst_limit); | |
1097 | } | |
1098 | ||
7ee20df1 BP |
1099 | /* Returns true if it makes sense for 'ofconn' to receive and process OpenFlow |
1100 | * messages. */ | |
1101 | static bool | |
1102 | ofconn_may_recv(const struct ofconn *ofconn) | |
1103 | { | |
1104 | int count = rconn_packet_counter_read (ofconn->reply_counter); | |
1105 | return (!ofconn->blocked || ofconn->retry) && count < OFCONN_REPLY_MAX; | |
1106 | } | |
1107 | ||
19a87e36 BP |
1108 | static void |
1109 | ofconn_run(struct ofconn *ofconn, | |
7ee20df1 | 1110 | bool (*handle_openflow)(struct ofconn *, struct ofpbuf *ofp_msg)) |
19a87e36 BP |
1111 | { |
1112 | struct connmgr *mgr = ofconn->connmgr; | |
19a87e36 BP |
1113 | size_t i; |
1114 | ||
1115 | for (i = 0; i < N_SCHEDULERS; i++) { | |
1116 | pinsched_run(ofconn->schedulers[i], do_send_packet_in, ofconn); | |
1117 | } | |
1118 | ||
1119 | rconn_run(ofconn->rconn); | |
1120 | ||
7ee20df1 BP |
1121 | if (handle_openflow) { |
1122 | /* Limit the number of iterations to avoid starving other tasks. */ | |
1123 | for (i = 0; i < 50 && ofconn_may_recv(ofconn); i++) { | |
1124 | struct ofpbuf *of_msg; | |
1125 | ||
1126 | of_msg = (ofconn->blocked | |
1127 | ? ofconn->blocked | |
1128 | : rconn_recv(ofconn->rconn)); | |
19a87e36 BP |
1129 | if (!of_msg) { |
1130 | break; | |
1131 | } | |
1132 | if (mgr->fail_open) { | |
1133 | fail_open_maybe_recover(mgr->fail_open); | |
1134 | } | |
7ee20df1 BP |
1135 | |
1136 | if (handle_openflow(ofconn, of_msg)) { | |
1137 | ofpbuf_delete(of_msg); | |
1138 | ofconn->blocked = NULL; | |
1139 | } else { | |
1140 | ofconn->blocked = of_msg; | |
1141 | ofconn->retry = false; | |
1142 | } | |
19a87e36 BP |
1143 | } |
1144 | } | |
1145 | ||
1146 | if (!rconn_is_alive(ofconn->rconn)) { | |
1147 | ofconn_destroy(ofconn); | |
7ee20df1 BP |
1148 | } else if (!rconn_is_connected(ofconn->rconn)) { |
1149 | ofconn_flush(ofconn); | |
19a87e36 BP |
1150 | } |
1151 | } | |
1152 | ||
1153 | static void | |
7ee20df1 | 1154 | ofconn_wait(struct ofconn *ofconn, bool handling_openflow) |
19a87e36 BP |
1155 | { |
1156 | int i; | |
1157 | ||
1158 | for (i = 0; i < N_SCHEDULERS; i++) { | |
1159 | pinsched_wait(ofconn->schedulers[i]); | |
1160 | } | |
1161 | rconn_run_wait(ofconn->rconn); | |
7ee20df1 | 1162 | if (handling_openflow && ofconn_may_recv(ofconn)) { |
19a87e36 | 1163 | rconn_recv_wait(ofconn->rconn); |
19a87e36 BP |
1164 | } |
1165 | } | |
1166 | ||
80d5aefd BP |
1167 | /* Returns true if 'ofconn' should receive asynchronous messages of the given |
1168 | * OAM_* 'type' and 'reason', which should be a OFPR_* value for OAM_PACKET_IN, | |
1169 | * a OFPPR_* value for OAM_PORT_STATUS, or an OFPRR_* value for | |
1170 | * OAM_FLOW_REMOVED. Returns false if the message should not be sent on | |
1171 | * 'ofconn'. */ | |
19a87e36 | 1172 | static bool |
80d5aefd BP |
1173 | ofconn_receives_async_msg(const struct ofconn *ofconn, |
1174 | enum ofconn_async_msg_type type, | |
1175 | unsigned int reason) | |
19a87e36 | 1176 | { |
80d5aefd BP |
1177 | const uint32_t *async_config; |
1178 | ||
1179 | assert(reason < 32); | |
1180 | assert((unsigned int) type < OAM_N_TYPES); | |
19a87e36 | 1181 | |
f0fd1a17 PS |
1182 | if (!rconn_is_connected(ofconn->rconn)) { |
1183 | return false; | |
f0fd1a17 | 1184 | } |
f0fd1a17 | 1185 | |
80d5aefd BP |
1186 | /* Keep the following code in sync with the documentation in the |
1187 | * "Asynchronous Messages" section in DESIGN. */ | |
1188 | ||
1189 | if (ofconn->type == OFCONN_SERVICE && !ofconn->miss_send_len) { | |
1190 | /* Service connections don't get asynchronous messages unless they have | |
1191 | * explicitly asked for them by setting a nonzero miss send length. */ | |
f0fd1a17 | 1192 | return false; |
f0fd1a17 | 1193 | } |
80d5aefd BP |
1194 | |
1195 | async_config = (ofconn->role == NX_ROLE_SLAVE | |
1196 | ? ofconn->slave_async_config | |
1197 | : ofconn->master_async_config); | |
1198 | if (!(async_config[type] & (1u << reason))) { | |
1199 | return false; | |
1200 | } | |
1201 | ||
1202 | return true; | |
f0fd1a17 PS |
1203 | } |
1204 | ||
19a87e36 BP |
1205 | /* Returns a human-readable name for an OpenFlow connection between 'mgr' and |
1206 | * 'target', suitable for use in log messages for identifying the connection. | |
1207 | * | |
1208 | * The name is dynamically allocated. The caller should free it (with free()) | |
1209 | * when it is no longer needed. */ | |
1210 | static char * | |
1211 | ofconn_make_name(const struct connmgr *mgr, const char *target) | |
1212 | { | |
1213 | return xasprintf("%s<->%s", mgr->name, target); | |
1214 | } | |
1215 | ||
1216 | static void | |
1217 | ofconn_set_rate_limit(struct ofconn *ofconn, int rate, int burst) | |
1218 | { | |
1219 | int i; | |
1220 | ||
1221 | for (i = 0; i < N_SCHEDULERS; i++) { | |
1222 | struct pinsched **s = &ofconn->schedulers[i]; | |
1223 | ||
1224 | if (rate > 0) { | |
1225 | if (!*s) { | |
1226 | *s = pinsched_create(rate, burst); | |
1227 | } else { | |
1228 | pinsched_set_limits(*s, rate, burst); | |
1229 | } | |
1230 | } else { | |
1231 | pinsched_destroy(*s); | |
1232 | *s = NULL; | |
1233 | } | |
1234 | } | |
1235 | } | |
1236 | ||
1237 | static void | |
1238 | ofconn_send(const struct ofconn *ofconn, struct ofpbuf *msg, | |
1239 | struct rconn_packet_counter *counter) | |
1240 | { | |
1241 | update_openflow_length(msg); | |
1242 | if (rconn_send(ofconn->rconn, msg, counter)) { | |
1243 | ofpbuf_delete(msg); | |
1244 | } | |
1245 | } | |
1246 | \f | |
1247 | /* Sending asynchronous messages. */ | |
1248 | ||
78bd1cd0 | 1249 | static void schedule_packet_in(struct ofconn *, struct ofputil_packet_in, |
29ebe880 | 1250 | const struct flow *); |
19a87e36 BP |
1251 | |
1252 | /* Sends an OFPT_PORT_STATUS message with 'opp' and 'reason' to appropriate | |
9cfcdadf | 1253 | * controllers managed by 'mgr'. */ |
19a87e36 BP |
1254 | void |
1255 | connmgr_send_port_status(struct connmgr *mgr, const struct ofp_phy_port *opp, | |
1256 | uint8_t reason) | |
1257 | { | |
1258 | /* XXX Should limit the number of queued port status change messages. */ | |
1259 | struct ofconn *ofconn; | |
1260 | ||
1261 | LIST_FOR_EACH (ofconn, node, &mgr->all_conns) { | |
80d5aefd BP |
1262 | if (ofconn_receives_async_msg(ofconn, OAM_PORT_STATUS, reason)) { |
1263 | struct ofp_port_status *ops; | |
1264 | struct ofpbuf *b; | |
1265 | ||
1266 | ops = make_openflow_xid(sizeof *ops, OFPT_PORT_STATUS, 0, &b); | |
1267 | ops->reason = reason; | |
1268 | ops->desc = *opp; | |
1269 | ofconn_send(ofconn, b, NULL); | |
19a87e36 | 1270 | } |
19a87e36 BP |
1271 | } |
1272 | } | |
1273 | ||
1274 | /* Sends an OFPT_FLOW_REMOVED or NXT_FLOW_REMOVED message based on 'fr' to | |
1275 | * appropriate controllers managed by 'mgr'. */ | |
1276 | void | |
1277 | connmgr_send_flow_removed(struct connmgr *mgr, | |
1278 | const struct ofputil_flow_removed *fr) | |
1279 | { | |
1280 | struct ofconn *ofconn; | |
1281 | ||
1282 | LIST_FOR_EACH (ofconn, node, &mgr->all_conns) { | |
80d5aefd BP |
1283 | if (ofconn_receives_async_msg(ofconn, OAM_FLOW_REMOVED, fr->reason)) { |
1284 | struct ofpbuf *msg; | |
1285 | ||
1286 | /* Account flow expirations as replies to OpenFlow requests. That | |
1287 | * works because preventing OpenFlow requests from being processed | |
1288 | * also prevents new flows from being added (and expiring). (It | |
1289 | * also prevents processing OpenFlow requests that would not add | |
1290 | * new flows, so it is imperfect.) */ | |
1291 | msg = ofputil_encode_flow_removed(fr, ofconn->flow_format); | |
1292 | ofconn_send_reply(ofconn, msg); | |
19a87e36 | 1293 | } |
19a87e36 BP |
1294 | } |
1295 | } | |
1296 | ||
78bd1cd0 | 1297 | /* Given 'pin', sends an OFPT_PACKET_IN message to each OpenFlow controller as |
29ebe880 | 1298 | * necessary according to their individual configurations. */ |
19a87e36 | 1299 | void |
78bd1cd0 BP |
1300 | connmgr_send_packet_in(struct connmgr *mgr, |
1301 | const struct ofputil_packet_in *pin, | |
29ebe880 | 1302 | const struct flow *flow) |
19a87e36 | 1303 | { |
29ebe880 | 1304 | struct ofconn *ofconn; |
19a87e36 | 1305 | |
19a87e36 | 1306 | LIST_FOR_EACH (ofconn, node, &mgr->all_conns) { |
a7349929 BP |
1307 | if (ofconn_receives_async_msg(ofconn, OAM_PACKET_IN, pin->reason) |
1308 | && ofconn->controller_id == pin->controller_id) { | |
29ebe880 | 1309 | schedule_packet_in(ofconn, *pin, flow); |
19a87e36 BP |
1310 | } |
1311 | } | |
19a87e36 BP |
1312 | } |
1313 | ||
1314 | /* pinsched callback for sending 'ofp_packet_in' on 'ofconn'. */ | |
1315 | static void | |
1316 | do_send_packet_in(struct ofpbuf *ofp_packet_in, void *ofconn_) | |
1317 | { | |
1318 | struct ofconn *ofconn = ofconn_; | |
1319 | ||
1320 | rconn_send_with_limit(ofconn->rconn, ofp_packet_in, | |
1321 | ofconn->packet_in_counter, 100); | |
1322 | } | |
1323 | ||
78bd1cd0 | 1324 | /* Takes 'pin', whose packet has the flow specified by 'flow', composes an |
19a87e36 | 1325 | * OpenFlow packet-in message from it, and passes it to 'ofconn''s packet |
29ebe880 | 1326 | * scheduler for sending. */ |
19a87e36 | 1327 | static void |
78bd1cd0 | 1328 | schedule_packet_in(struct ofconn *ofconn, struct ofputil_packet_in pin, |
29ebe880 | 1329 | const struct flow *flow) |
19a87e36 BP |
1330 | { |
1331 | struct connmgr *mgr = ofconn->connmgr; | |
19a87e36 BP |
1332 | |
1333 | /* Get OpenFlow buffer_id. */ | |
78bd1cd0 | 1334 | if (pin.reason == OFPR_ACTION) { |
19a87e36 BP |
1335 | pin.buffer_id = UINT32_MAX; |
1336 | } else if (mgr->fail_open && fail_open_is_active(mgr->fail_open)) { | |
1337 | pin.buffer_id = pktbuf_get_null(); | |
1338 | } else if (!ofconn->pktbuf) { | |
1339 | pin.buffer_id = UINT32_MAX; | |
1340 | } else { | |
3e3252fa EJ |
1341 | pin.buffer_id = pktbuf_save(ofconn->pktbuf, pin.packet, pin.packet_len, |
1342 | flow->in_port); | |
19a87e36 BP |
1343 | } |
1344 | ||
1345 | /* Figure out how much of the packet to send. */ | |
78bd1cd0 | 1346 | if (pin.reason == OFPR_NO_MATCH) { |
3e3252fa | 1347 | pin.send_len = pin.packet_len; |
78bd1cd0 BP |
1348 | } else { |
1349 | /* Caller should have initialized 'send_len' to 'max_len' specified in | |
1350 | * struct ofp_action_output. */ | |
1351 | } | |
19a87e36 BP |
1352 | if (pin.buffer_id != UINT32_MAX) { |
1353 | pin.send_len = MIN(pin.send_len, ofconn->miss_send_len); | |
1354 | } | |
19a87e36 BP |
1355 | |
1356 | /* Make OFPT_PACKET_IN and hand over to packet scheduler. It might | |
1357 | * immediately call into do_send_packet_in() or it might buffer it for a | |
1358 | * while (until a later call to pinsched_run()). */ | |
78bd1cd0 | 1359 | pinsched_send(ofconn->schedulers[pin.reason == OFPR_NO_MATCH ? 0 : 1], |
54834960 EJ |
1360 | flow->in_port, |
1361 | ofputil_encode_packet_in(&pin, ofconn->packet_in_format), | |
19a87e36 BP |
1362 | do_send_packet_in, ofconn); |
1363 | } | |
1364 | \f | |
1365 | /* Fail-open settings. */ | |
1366 | ||
1367 | /* Returns the failure handling mode (OFPROTO_FAIL_SECURE or | |
1368 | * OFPROTO_FAIL_STANDALONE) for 'mgr'. */ | |
1369 | enum ofproto_fail_mode | |
1370 | connmgr_get_fail_mode(const struct connmgr *mgr) | |
1371 | { | |
1372 | return mgr->fail_mode; | |
1373 | } | |
1374 | ||
1375 | /* Sets the failure handling mode for 'mgr' to 'fail_mode' (either | |
1376 | * OFPROTO_FAIL_SECURE or OFPROTO_FAIL_STANDALONE). */ | |
1377 | void | |
1378 | connmgr_set_fail_mode(struct connmgr *mgr, enum ofproto_fail_mode fail_mode) | |
1379 | { | |
08fd19f0 BP |
1380 | if (mgr->fail_mode != fail_mode) { |
1381 | mgr->fail_mode = fail_mode; | |
1382 | update_fail_open(mgr); | |
1383 | if (!connmgr_has_controllers(mgr)) { | |
1384 | ofproto_flush_flows(mgr->ofproto); | |
1385 | } | |
1386 | } | |
19a87e36 BP |
1387 | } |
1388 | \f | |
1389 | /* Fail-open implementation. */ | |
1390 | ||
1391 | /* Returns the longest probe interval among the primary controllers configured | |
1392 | * on 'mgr'. Returns 0 if there are no primary controllers. */ | |
1393 | int | |
1394 | connmgr_get_max_probe_interval(const struct connmgr *mgr) | |
1395 | { | |
1396 | const struct ofconn *ofconn; | |
1397 | int max_probe_interval; | |
1398 | ||
1399 | max_probe_interval = 0; | |
1400 | HMAP_FOR_EACH (ofconn, hmap_node, &mgr->controllers) { | |
1401 | int probe_interval = rconn_get_probe_interval(ofconn->rconn); | |
1402 | max_probe_interval = MAX(max_probe_interval, probe_interval); | |
1403 | } | |
1404 | return max_probe_interval; | |
1405 | } | |
1406 | ||
1407 | /* Returns the number of seconds for which all of 'mgr's primary controllers | |
1408 | * have been disconnected. Returns 0 if 'mgr' has no primary controllers. */ | |
1409 | int | |
1410 | connmgr_failure_duration(const struct connmgr *mgr) | |
1411 | { | |
1412 | const struct ofconn *ofconn; | |
1413 | int min_failure_duration; | |
1414 | ||
1415 | if (!connmgr_has_controllers(mgr)) { | |
1416 | return 0; | |
1417 | } | |
1418 | ||
1419 | min_failure_duration = INT_MAX; | |
1420 | HMAP_FOR_EACH (ofconn, hmap_node, &mgr->controllers) { | |
1421 | int failure_duration = rconn_failure_duration(ofconn->rconn); | |
1422 | min_failure_duration = MIN(min_failure_duration, failure_duration); | |
1423 | } | |
1424 | return min_failure_duration; | |
1425 | } | |
1426 | ||
1427 | /* Returns true if at least one primary controller is connected (regardless of | |
1428 | * whether those controllers are believed to have authenticated and accepted | |
1429 | * this switch), false if none of them are connected. */ | |
1430 | bool | |
1431 | connmgr_is_any_controller_connected(const struct connmgr *mgr) | |
1432 | { | |
1433 | const struct ofconn *ofconn; | |
1434 | ||
1435 | HMAP_FOR_EACH (ofconn, hmap_node, &mgr->controllers) { | |
1436 | if (rconn_is_connected(ofconn->rconn)) { | |
1437 | return true; | |
1438 | } | |
1439 | } | |
1440 | return false; | |
1441 | } | |
1442 | ||
1443 | /* Returns true if at least one primary controller is believed to have | |
1444 | * authenticated and accepted this switch, false otherwise. */ | |
1445 | bool | |
1446 | connmgr_is_any_controller_admitted(const struct connmgr *mgr) | |
1447 | { | |
1448 | const struct ofconn *ofconn; | |
1449 | ||
1450 | HMAP_FOR_EACH (ofconn, hmap_node, &mgr->controllers) { | |
1451 | if (rconn_is_admitted(ofconn->rconn)) { | |
1452 | return true; | |
1453 | } | |
1454 | } | |
1455 | return false; | |
1456 | } | |
1457 | ||
1458 | /* Sends 'packet' to each controller connected to 'mgr'. Takes ownership of | |
1459 | * 'packet'. */ | |
1460 | void | |
1461 | connmgr_broadcast(struct connmgr *mgr, struct ofpbuf *packet) | |
1462 | { | |
1463 | struct ofconn *ofconn, *prev; | |
1464 | ||
1465 | prev = NULL; | |
1466 | LIST_FOR_EACH (ofconn, node, &mgr->all_conns) { | |
1467 | if (prev) { | |
1468 | ofconn_send_reply(ofconn, ofpbuf_clone(packet)); | |
1469 | } | |
1470 | if (rconn_is_connected(ofconn->rconn)) { | |
1471 | prev = ofconn; | |
1472 | } | |
1473 | } | |
1474 | if (prev) { | |
2e2dd32b | 1475 | ofconn_send_reply(prev, packet); |
19a87e36 BP |
1476 | } else { |
1477 | ofpbuf_delete(packet); | |
1478 | } | |
1479 | } | |
1480 | \f | |
1481 | /* In-band configuration. */ | |
1482 | ||
1483 | static bool any_extras_changed(const struct connmgr *, | |
1484 | const struct sockaddr_in *extras, size_t n); | |
1485 | ||
1486 | /* Sets the 'n' TCP port addresses in 'extras' as ones to which 'mgr''s | |
1487 | * in-band control should guarantee access, in the same way that in-band | |
1488 | * control guarantees access to OpenFlow controllers. */ | |
1489 | void | |
1490 | connmgr_set_extra_in_band_remotes(struct connmgr *mgr, | |
1491 | const struct sockaddr_in *extras, size_t n) | |
1492 | { | |
1493 | if (!any_extras_changed(mgr, extras, n)) { | |
1494 | return; | |
1495 | } | |
1496 | ||
1497 | free(mgr->extra_in_band_remotes); | |
1498 | mgr->n_extra_remotes = n; | |
1499 | mgr->extra_in_band_remotes = xmemdup(extras, n * sizeof *extras); | |
1500 | ||
1501 | update_in_band_remotes(mgr); | |
1502 | } | |
1503 | ||
1504 | /* Sets the OpenFlow queue used by flows set up by in-band control on | |
1505 | * 'mgr' to 'queue_id'. If 'queue_id' is negative, then in-band control | |
1506 | * flows will use the default queue. */ | |
1507 | void | |
1508 | connmgr_set_in_band_queue(struct connmgr *mgr, int queue_id) | |
1509 | { | |
1510 | if (queue_id != mgr->in_band_queue) { | |
1511 | mgr->in_band_queue = queue_id; | |
1512 | update_in_band_remotes(mgr); | |
1513 | } | |
1514 | } | |
1515 | ||
1516 | static bool | |
1517 | any_extras_changed(const struct connmgr *mgr, | |
1518 | const struct sockaddr_in *extras, size_t n) | |
1519 | { | |
1520 | size_t i; | |
1521 | ||
1522 | if (n != mgr->n_extra_remotes) { | |
1523 | return true; | |
1524 | } | |
1525 | ||
1526 | for (i = 0; i < n; i++) { | |
1527 | const struct sockaddr_in *old = &mgr->extra_in_band_remotes[i]; | |
1528 | const struct sockaddr_in *new = &extras[i]; | |
1529 | ||
1530 | if (old->sin_addr.s_addr != new->sin_addr.s_addr || | |
1531 | old->sin_port != new->sin_port) { | |
1532 | return true; | |
1533 | } | |
1534 | } | |
1535 | ||
1536 | return false; | |
1537 | } | |
1538 | \f | |
1539 | /* In-band implementation. */ | |
1540 | ||
1541 | bool | |
1542 | connmgr_msg_in_hook(struct connmgr *mgr, const struct flow *flow, | |
1543 | const struct ofpbuf *packet) | |
1544 | { | |
1545 | return mgr->in_band && in_band_msg_in_hook(mgr->in_band, flow, packet); | |
1546 | } | |
1547 | ||
1548 | bool | |
1549 | connmgr_may_set_up_flow(struct connmgr *mgr, const struct flow *flow, | |
1550 | const struct nlattr *odp_actions, | |
1551 | size_t actions_len) | |
1552 | { | |
1553 | return !mgr->in_band || in_band_rule_check(flow, odp_actions, actions_len); | |
1554 | } | |
1555 | \f | |
1556 | /* Fail-open and in-band implementation. */ | |
1557 | ||
1558 | /* Called by 'ofproto' after all flows have been flushed, to allow fail-open | |
7ee20df1 BP |
1559 | * and standalone mode to re-create their flows. |
1560 | * | |
1561 | * In-band control has more sophisticated code that manages flows itself. */ | |
19a87e36 BP |
1562 | void |
1563 | connmgr_flushed(struct connmgr *mgr) | |
1564 | { | |
19a87e36 BP |
1565 | if (mgr->fail_open) { |
1566 | fail_open_flushed(mgr->fail_open); | |
1567 | } | |
08fd19f0 BP |
1568 | |
1569 | /* If there are no controllers and we're in standalone mode, set up a flow | |
1570 | * that matches every packet and directs them to OFPP_NORMAL (which goes to | |
1571 | * us). Otherwise, the switch is in secure mode and we won't pass any | |
1572 | * traffic until a controller has been defined and it tells us to do so. */ | |
1573 | if (!connmgr_has_controllers(mgr) | |
1574 | && mgr->fail_mode == OFPROTO_FAIL_STANDALONE) { | |
1575 | union ofp_action action; | |
1576 | struct cls_rule rule; | |
1577 | ||
1578 | memset(&action, 0, sizeof action); | |
1579 | action.type = htons(OFPAT_OUTPUT); | |
1580 | action.output.len = htons(sizeof action); | |
1581 | action.output.port = htons(OFPP_NORMAL); | |
1582 | cls_rule_init_catchall(&rule, 0); | |
1583 | ofproto_add_flow(mgr->ofproto, &rule, &action, 1); | |
1584 | } | |
19a87e36 BP |
1585 | } |
1586 | \f | |
1587 | /* Creates a new ofservice for 'target' in 'mgr'. Returns 0 if successful, | |
1588 | * otherwise a positive errno value. | |
1589 | * | |
1590 | * ofservice_reconfigure() must be called to fully configure the new | |
1591 | * ofservice. */ | |
1592 | static int | |
1593 | ofservice_create(struct connmgr *mgr, const char *target) | |
1594 | { | |
1595 | struct ofservice *ofservice; | |
1596 | struct pvconn *pvconn; | |
1597 | int error; | |
1598 | ||
1599 | error = pvconn_open(target, &pvconn); | |
1600 | if (error) { | |
1601 | return error; | |
1602 | } | |
1603 | ||
1604 | ofservice = xzalloc(sizeof *ofservice); | |
1605 | hmap_insert(&mgr->services, &ofservice->node, hash_string(target, 0)); | |
1606 | ofservice->pvconn = pvconn; | |
1607 | ||
1608 | return 0; | |
1609 | } | |
1610 | ||
1611 | static void | |
1612 | ofservice_destroy(struct connmgr *mgr, struct ofservice *ofservice) | |
1613 | { | |
1614 | hmap_remove(&mgr->services, &ofservice->node); | |
1615 | pvconn_close(ofservice->pvconn); | |
1616 | free(ofservice); | |
1617 | } | |
1618 | ||
1619 | static void | |
1620 | ofservice_reconfigure(struct ofservice *ofservice, | |
1621 | const struct ofproto_controller *c) | |
1622 | { | |
1623 | ofservice->probe_interval = c->probe_interval; | |
1624 | ofservice->rate_limit = c->rate_limit; | |
1625 | ofservice->burst_limit = c->burst_limit; | |
9886b662 | 1626 | ofservice->enable_async_msgs = c->enable_async_msgs; |
19a87e36 BP |
1627 | } |
1628 | ||
1629 | /* Finds and returns the ofservice within 'mgr' that has the given | |
1630 | * 'target', or a null pointer if none exists. */ | |
1631 | static struct ofservice * | |
1632 | ofservice_lookup(struct connmgr *mgr, const char *target) | |
1633 | { | |
1634 | struct ofservice *ofservice; | |
1635 | ||
1636 | HMAP_FOR_EACH_WITH_HASH (ofservice, node, hash_string(target, 0), | |
1637 | &mgr->services) { | |
1638 | if (!strcmp(pvconn_get_name(ofservice->pvconn), target)) { | |
1639 | return ofservice; | |
1640 | } | |
1641 | } | |
1642 | return NULL; | |
1643 | } |