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