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19a87e36 | 1 | /* |
82c8c53c | 2 | * Copyright (c) 2009, 2010, 2011, 2012, 2013 Nicira, Inc. |
19a87e36 BP |
3 | * |
4 | * Licensed under the Apache License, Version 2.0 (the "License"); | |
5 | * you may not use this file except in compliance with the License. | |
6 | * You may obtain a copy of the License at: | |
7 | * | |
8 | * http://www.apache.org/licenses/LICENSE-2.0 | |
9 | * | |
10 | * Unless required by applicable law or agreed to in writing, software | |
11 | * distributed under the License is distributed on an "AS IS" BASIS, | |
12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
13 | * See the License for the specific language governing permissions and | |
14 | * limitations under the License. | |
15 | */ | |
16 | ||
17 | #include <config.h> | |
18 | ||
19 | #include "connmgr.h" | |
20 | ||
21 | #include <errno.h> | |
22 | #include <stdlib.h> | |
23 | ||
24 | #include "coverage.h" | |
19a87e36 BP |
25 | #include "fail-open.h" |
26 | #include "in-band.h" | |
27 | #include "odp-util.h" | |
f25d0cf3 | 28 | #include "ofp-actions.h" |
982697a4 | 29 | #include "ofp-msgs.h" |
19a87e36 BP |
30 | #include "ofp-util.h" |
31 | #include "ofpbuf.h" | |
5bee6e26 | 32 | #include "ofproto-provider.h" |
19a87e36 BP |
33 | #include "pinsched.h" |
34 | #include "poll-loop.h" | |
35 | #include "pktbuf.h" | |
36 | #include "rconn.h" | |
37 | #include "shash.h" | |
0d085684 | 38 | #include "simap.h" |
5bd31620 | 39 | #include "stream.h" |
19a87e36 BP |
40 | #include "timeval.h" |
41 | #include "vconn.h" | |
42 | #include "vlog.h" | |
43 | ||
44 | VLOG_DEFINE_THIS_MODULE(connmgr); | |
45 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
46 | ||
19a87e36 BP |
47 | /* An OpenFlow connection. */ |
48 | struct ofconn { | |
c4b31872 BP |
49 | /* Configuration that persists from one connection to the next. */ |
50 | ||
19a87e36 | 51 | struct list node; /* In struct connmgr's "all_conns" list. */ |
c4b31872 BP |
52 | struct hmap_node hmap_node; /* In struct connmgr's "controllers" map. */ |
53 | ||
54 | struct connmgr *connmgr; /* Connection's manager. */ | |
19a87e36 BP |
55 | struct rconn *rconn; /* OpenFlow connection. */ |
56 | enum ofconn_type type; /* Type. */ | |
c4b31872 | 57 | enum ofproto_band band; /* In-band or out-of-band? */ |
9886b662 | 58 | bool enable_async_msgs; /* Initially enable async messages? */ |
c4b31872 BP |
59 | |
60 | /* State that should be cleared from one connection to the next. */ | |
61 | ||
62 | /* OpenFlow state. */ | |
f4f1ea7e | 63 | enum ofp12_controller_role role; /* Role. */ |
27527aa0 | 64 | enum ofputil_protocol protocol; /* Current protocol variant. */ |
54834960 | 65 | enum nx_packet_in_format packet_in_format; /* OFPT_PACKET_IN format. */ |
19a87e36 | 66 | |
7ee20df1 BP |
67 | /* Asynchronous flow table operation support. */ |
68 | struct list opgroups; /* Contains pending "ofopgroups", if any. */ | |
69 | struct ofpbuf *blocked; /* Postponed OpenFlow message, if any. */ | |
70 | bool retry; /* True if 'blocked' is ready to try again. */ | |
71 | ||
19a87e36 BP |
72 | /* OFPT_PACKET_IN related data. */ |
73 | struct rconn_packet_counter *packet_in_counter; /* # queued on 'rconn'. */ | |
74 | #define N_SCHEDULERS 2 | |
75 | struct pinsched *schedulers[N_SCHEDULERS]; | |
76 | struct pktbuf *pktbuf; /* OpenFlow packet buffers. */ | |
77 | int miss_send_len; /* Bytes to send of buffered packets. */ | |
a7349929 | 78 | uint16_t controller_id; /* Connection controller ID. */ |
19a87e36 BP |
79 | |
80 | /* Number of OpenFlow messages queued on 'rconn' as replies to OpenFlow | |
81 | * requests, and the maximum number before we stop reading OpenFlow | |
82 | * requests. */ | |
83 | #define OFCONN_REPLY_MAX 100 | |
84 | struct rconn_packet_counter *reply_counter; | |
80d5aefd BP |
85 | |
86 | /* Asynchronous message configuration in each possible roles. | |
87 | * | |
88 | * A 1-bit enables sending an asynchronous message for one possible reason | |
89 | * that the message might be generated, a 0-bit disables it. */ | |
90 | uint32_t master_async_config[OAM_N_TYPES]; /* master, other */ | |
91 | uint32_t slave_async_config[OAM_N_TYPES]; /* slave */ | |
2b07c8b1 BP |
92 | |
93 | /* Flow monitors. */ | |
94 | struct hmap monitors; /* Contains "struct ofmonitor"s. */ | |
95 | struct list updates; /* List of "struct ofpbuf"s. */ | |
96 | bool sent_abbrev_update; /* Does 'updates' contain NXFME_ABBREV? */ | |
97 | struct rconn_packet_counter *monitor_counter; | |
98 | uint64_t monitor_paused; | |
19a87e36 BP |
99 | }; |
100 | ||
101 | static struct ofconn *ofconn_create(struct connmgr *, struct rconn *, | |
9886b662 | 102 | enum ofconn_type, bool enable_async_msgs); |
19a87e36 | 103 | static void ofconn_destroy(struct ofconn *); |
c4b31872 | 104 | static void ofconn_flush(struct ofconn *); |
19a87e36 BP |
105 | |
106 | static void ofconn_reconfigure(struct ofconn *, | |
107 | const struct ofproto_controller *); | |
108 | ||
109 | static void ofconn_run(struct ofconn *, | |
7ee20df1 | 110 | bool (*handle_openflow)(struct ofconn *, |
e03248b7 | 111 | const struct ofpbuf *ofp_msg)); |
7ee20df1 | 112 | static void ofconn_wait(struct ofconn *, bool handling_openflow); |
19a87e36 BP |
113 | |
114 | static const char *ofconn_get_target(const struct ofconn *); | |
115 | static char *ofconn_make_name(const struct connmgr *, const char *target); | |
116 | ||
117 | static void ofconn_set_rate_limit(struct ofconn *, int rate, int burst); | |
118 | ||
19a87e36 BP |
119 | static void ofconn_send(const struct ofconn *, struct ofpbuf *, |
120 | struct rconn_packet_counter *); | |
121 | ||
122 | static void do_send_packet_in(struct ofpbuf *, void *ofconn_); | |
123 | ||
124 | /* A listener for incoming OpenFlow "service" connections. */ | |
125 | struct ofservice { | |
126 | struct hmap_node node; /* In struct connmgr's "services" hmap. */ | |
127 | struct pvconn *pvconn; /* OpenFlow connection listener. */ | |
128 | ||
129 | /* These are not used by ofservice directly. They are settings for | |
130 | * accepted "struct ofconn"s from the pvconn. */ | |
131 | int probe_interval; /* Max idle time before probing, in seconds. */ | |
132 | int rate_limit; /* Max packet-in rate in packets per second. */ | |
133 | int burst_limit; /* Limit on accumulating packet credits. */ | |
9886b662 | 134 | bool enable_async_msgs; /* Initially enable async messages? */ |
f125905c | 135 | uint8_t dscp; /* DSCP Value for controller connection */ |
90ef0206 SH |
136 | uint32_t allowed_versions; /* OpenFlow protocol versions that may |
137 | * be negotiated for a session. */ | |
19a87e36 BP |
138 | }; |
139 | ||
140 | static void ofservice_reconfigure(struct ofservice *, | |
141 | const struct ofproto_controller *); | |
00401ef0 SH |
142 | static int ofservice_create(struct connmgr *mgr, const char *target, |
143 | uint32_t allowed_versions, uint8_t dscp); | |
19a87e36 BP |
144 | static void ofservice_destroy(struct connmgr *, struct ofservice *); |
145 | static struct ofservice *ofservice_lookup(struct connmgr *, | |
146 | const char *target); | |
147 | ||
148 | /* Connection manager for an OpenFlow switch. */ | |
149 | struct connmgr { | |
150 | struct ofproto *ofproto; | |
151 | char *name; | |
152 | char *local_port_name; | |
153 | ||
154 | /* OpenFlow connections. */ | |
155 | struct hmap controllers; /* Controller "struct ofconn"s. */ | |
156 | struct list all_conns; /* Contains "struct ofconn"s. */ | |
6ea4776b JR |
157 | uint64_t master_election_id; /* monotonically increasing sequence number |
158 | * for master election */ | |
159 | bool master_election_id_defined; | |
19a87e36 BP |
160 | |
161 | /* OpenFlow listeners. */ | |
162 | struct hmap services; /* Contains "struct ofservice"s. */ | |
163 | struct pvconn **snoops; | |
164 | size_t n_snoops; | |
165 | ||
166 | /* Fail open. */ | |
167 | struct fail_open *fail_open; | |
168 | enum ofproto_fail_mode fail_mode; | |
169 | ||
170 | /* In-band control. */ | |
171 | struct in_band *in_band; | |
19a87e36 BP |
172 | struct sockaddr_in *extra_in_band_remotes; |
173 | size_t n_extra_remotes; | |
174 | int in_band_queue; | |
175 | }; | |
176 | ||
177 | static void update_in_band_remotes(struct connmgr *); | |
178 | static void add_snooper(struct connmgr *, struct vconn *); | |
2b07c8b1 BP |
179 | static void ofmonitor_run(struct connmgr *); |
180 | static void ofmonitor_wait(struct connmgr *); | |
19a87e36 BP |
181 | |
182 | /* Creates and returns a new connection manager owned by 'ofproto'. 'name' is | |
183 | * a name for the ofproto suitable for using in log messages. | |
184 | * 'local_port_name' is the name of the local port (OFPP_LOCAL) within | |
185 | * 'ofproto'. */ | |
186 | struct connmgr * | |
187 | connmgr_create(struct ofproto *ofproto, | |
188 | const char *name, const char *local_port_name) | |
189 | { | |
190 | struct connmgr *mgr; | |
191 | ||
192 | mgr = xmalloc(sizeof *mgr); | |
193 | mgr->ofproto = ofproto; | |
194 | mgr->name = xstrdup(name); | |
195 | mgr->local_port_name = xstrdup(local_port_name); | |
196 | ||
197 | hmap_init(&mgr->controllers); | |
198 | list_init(&mgr->all_conns); | |
6ea4776b JR |
199 | mgr->master_election_id = 0; |
200 | mgr->master_election_id_defined = false; | |
19a87e36 BP |
201 | |
202 | hmap_init(&mgr->services); | |
203 | mgr->snoops = NULL; | |
204 | mgr->n_snoops = 0; | |
205 | ||
206 | mgr->fail_open = NULL; | |
207 | mgr->fail_mode = OFPROTO_FAIL_SECURE; | |
208 | ||
209 | mgr->in_band = NULL; | |
19a87e36 BP |
210 | mgr->extra_in_band_remotes = NULL; |
211 | mgr->n_extra_remotes = 0; | |
212 | mgr->in_band_queue = -1; | |
213 | ||
214 | return mgr; | |
215 | } | |
216 | ||
217 | /* Frees 'mgr' and all of its resources. */ | |
218 | void | |
219 | connmgr_destroy(struct connmgr *mgr) | |
220 | { | |
221 | struct ofservice *ofservice, *next_ofservice; | |
222 | struct ofconn *ofconn, *next_ofconn; | |
223 | size_t i; | |
224 | ||
225 | if (!mgr) { | |
226 | return; | |
227 | } | |
228 | ||
229 | LIST_FOR_EACH_SAFE (ofconn, next_ofconn, node, &mgr->all_conns) { | |
230 | ofconn_destroy(ofconn); | |
231 | } | |
232 | hmap_destroy(&mgr->controllers); | |
233 | ||
234 | HMAP_FOR_EACH_SAFE (ofservice, next_ofservice, node, &mgr->services) { | |
235 | ofservice_destroy(mgr, ofservice); | |
236 | } | |
237 | hmap_destroy(&mgr->services); | |
238 | ||
239 | for (i = 0; i < mgr->n_snoops; i++) { | |
240 | pvconn_close(mgr->snoops[i]); | |
241 | } | |
242 | free(mgr->snoops); | |
243 | ||
244 | fail_open_destroy(mgr->fail_open); | |
245 | mgr->fail_open = NULL; | |
246 | ||
247 | in_band_destroy(mgr->in_band); | |
248 | mgr->in_band = NULL; | |
249 | free(mgr->extra_in_band_remotes); | |
250 | free(mgr->name); | |
251 | free(mgr->local_port_name); | |
252 | ||
253 | free(mgr); | |
254 | } | |
255 | ||
7ee20df1 BP |
256 | /* Does all of the periodic maintenance required by 'mgr'. |
257 | * | |
258 | * If 'handle_openflow' is nonnull, calls 'handle_openflow' for each message | |
259 | * received on an OpenFlow connection, passing along the OpenFlow connection | |
260 | * itself and the message that was sent. If 'handle_openflow' returns true, | |
261 | * the message is considered to be fully processed. If 'handle_openflow' | |
262 | * returns false, the message is considered not to have been processed at all; | |
263 | * it will be stored and re-presented to 'handle_openflow' following the next | |
264 | * call to connmgr_retry(). 'handle_openflow' must not modify or free the | |
265 | * message. | |
266 | * | |
267 | * If 'handle_openflow' is NULL, no OpenFlow messages will be processed and | |
268 | * other activities that could affect the flow table (in-band processing, | |
269 | * fail-open processing) are suppressed too. */ | |
19a87e36 BP |
270 | void |
271 | connmgr_run(struct connmgr *mgr, | |
e03248b7 JR |
272 | bool (*handle_openflow)(struct ofconn *, |
273 | const struct ofpbuf *ofp_msg)) | |
19a87e36 BP |
274 | { |
275 | struct ofconn *ofconn, *next_ofconn; | |
276 | struct ofservice *ofservice; | |
277 | size_t i; | |
278 | ||
7ee20df1 | 279 | if (handle_openflow && mgr->in_band) { |
6da1e809 BP |
280 | if (!in_band_run(mgr->in_band)) { |
281 | in_band_destroy(mgr->in_band); | |
282 | mgr->in_band = NULL; | |
283 | } | |
19a87e36 BP |
284 | } |
285 | ||
286 | LIST_FOR_EACH_SAFE (ofconn, next_ofconn, node, &mgr->all_conns) { | |
287 | ofconn_run(ofconn, handle_openflow); | |
288 | } | |
2b07c8b1 | 289 | ofmonitor_run(mgr); |
19a87e36 BP |
290 | |
291 | /* Fail-open maintenance. Do this after processing the ofconns since | |
292 | * fail-open checks the status of the controller rconn. */ | |
7ee20df1 | 293 | if (handle_openflow && mgr->fail_open) { |
19a87e36 BP |
294 | fail_open_run(mgr->fail_open); |
295 | } | |
296 | ||
297 | HMAP_FOR_EACH (ofservice, node, &mgr->services) { | |
298 | struct vconn *vconn; | |
299 | int retval; | |
300 | ||
7a25bd99 | 301 | retval = pvconn_accept(ofservice->pvconn, &vconn); |
19a87e36 BP |
302 | if (!retval) { |
303 | struct rconn *rconn; | |
304 | char *name; | |
305 | ||
f125905c | 306 | /* Passing default value for creation of the rconn */ |
1d9ffc17 SH |
307 | rconn = rconn_create(ofservice->probe_interval, 0, ofservice->dscp, |
308 | vconn_get_allowed_versions(vconn)); | |
19a87e36 BP |
309 | name = ofconn_make_name(mgr, vconn_get_name(vconn)); |
310 | rconn_connect_unreliably(rconn, vconn, name); | |
311 | free(name); | |
312 | ||
9886b662 BP |
313 | ofconn = ofconn_create(mgr, rconn, OFCONN_SERVICE, |
314 | ofservice->enable_async_msgs); | |
19a87e36 BP |
315 | ofconn_set_rate_limit(ofconn, ofservice->rate_limit, |
316 | ofservice->burst_limit); | |
317 | } else if (retval != EAGAIN) { | |
10a89ef0 | 318 | VLOG_WARN_RL(&rl, "accept failed (%s)", ovs_strerror(retval)); |
19a87e36 BP |
319 | } |
320 | } | |
321 | ||
322 | for (i = 0; i < mgr->n_snoops; i++) { | |
323 | struct vconn *vconn; | |
324 | int retval; | |
325 | ||
7a25bd99 | 326 | retval = pvconn_accept(mgr->snoops[i], &vconn); |
19a87e36 BP |
327 | if (!retval) { |
328 | add_snooper(mgr, vconn); | |
329 | } else if (retval != EAGAIN) { | |
10a89ef0 | 330 | VLOG_WARN_RL(&rl, "accept failed (%s)", ovs_strerror(retval)); |
19a87e36 BP |
331 | } |
332 | } | |
333 | } | |
334 | ||
7ee20df1 BP |
335 | /* Causes the poll loop to wake up when connmgr_run() needs to run. |
336 | * | |
337 | * If 'handling_openflow' is true, arriving OpenFlow messages and other | |
338 | * activities that affect the flow table will wake up the poll loop. If | |
339 | * 'handling_openflow' is false, they will not. */ | |
19a87e36 | 340 | void |
7ee20df1 | 341 | connmgr_wait(struct connmgr *mgr, bool handling_openflow) |
19a87e36 BP |
342 | { |
343 | struct ofservice *ofservice; | |
344 | struct ofconn *ofconn; | |
345 | size_t i; | |
346 | ||
347 | LIST_FOR_EACH (ofconn, node, &mgr->all_conns) { | |
7ee20df1 | 348 | ofconn_wait(ofconn, handling_openflow); |
19a87e36 | 349 | } |
2b07c8b1 | 350 | ofmonitor_wait(mgr); |
7ee20df1 | 351 | if (handling_openflow && mgr->in_band) { |
19a87e36 BP |
352 | in_band_wait(mgr->in_band); |
353 | } | |
7ee20df1 | 354 | if (handling_openflow && mgr->fail_open) { |
19a87e36 BP |
355 | fail_open_wait(mgr->fail_open); |
356 | } | |
357 | HMAP_FOR_EACH (ofservice, node, &mgr->services) { | |
358 | pvconn_wait(ofservice->pvconn); | |
359 | } | |
360 | for (i = 0; i < mgr->n_snoops; i++) { | |
361 | pvconn_wait(mgr->snoops[i]); | |
362 | } | |
363 | } | |
364 | ||
0d085684 BP |
365 | /* Adds some memory usage statistics for 'mgr' into 'usage', for use with |
366 | * memory_report(). */ | |
367 | void | |
368 | connmgr_get_memory_usage(const struct connmgr *mgr, struct simap *usage) | |
369 | { | |
370 | const struct ofconn *ofconn; | |
371 | unsigned int packets = 0; | |
372 | unsigned int ofconns = 0; | |
373 | ||
374 | LIST_FOR_EACH (ofconn, node, &mgr->all_conns) { | |
375 | int i; | |
376 | ||
377 | ofconns++; | |
378 | ||
379 | packets += rconn_count_txqlen(ofconn->rconn); | |
380 | for (i = 0; i < N_SCHEDULERS; i++) { | |
381 | packets += pinsched_count_txqlen(ofconn->schedulers[i]); | |
382 | } | |
383 | packets += pktbuf_count_packets(ofconn->pktbuf); | |
384 | } | |
385 | simap_increase(usage, "ofconns", ofconns); | |
386 | simap_increase(usage, "packets", packets); | |
387 | } | |
388 | ||
19a87e36 BP |
389 | /* Returns the ofproto that owns 'ofconn''s connmgr. */ |
390 | struct ofproto * | |
391 | ofconn_get_ofproto(const struct ofconn *ofconn) | |
392 | { | |
393 | return ofconn->connmgr->ofproto; | |
394 | } | |
7ee20df1 BP |
395 | |
396 | /* If processing of OpenFlow messages was blocked on any 'mgr' ofconns by | |
397 | * returning false to the 'handle_openflow' callback to connmgr_run(), this | |
398 | * re-enables them. */ | |
399 | void | |
400 | connmgr_retry(struct connmgr *mgr) | |
401 | { | |
402 | struct ofconn *ofconn; | |
403 | ||
404 | LIST_FOR_EACH (ofconn, node, &mgr->all_conns) { | |
405 | ofconn->retry = true; | |
406 | } | |
407 | } | |
19a87e36 BP |
408 | \f |
409 | /* OpenFlow configuration. */ | |
410 | ||
1d9ffc17 SH |
411 | static void add_controller(struct connmgr *, const char *target, uint8_t dscp, |
412 | uint32_t allowed_versions); | |
19a87e36 BP |
413 | static struct ofconn *find_controller_by_target(struct connmgr *, |
414 | const char *target); | |
415 | static void update_fail_open(struct connmgr *); | |
416 | static int set_pvconns(struct pvconn ***pvconnsp, size_t *n_pvconnsp, | |
81e2083f | 417 | const struct sset *); |
19a87e36 BP |
418 | |
419 | /* Returns true if 'mgr' has any configured primary controllers. | |
420 | * | |
421 | * Service controllers do not count, but configured primary controllers do | |
422 | * count whether or not they are currently connected. */ | |
423 | bool | |
424 | connmgr_has_controllers(const struct connmgr *mgr) | |
425 | { | |
426 | return !hmap_is_empty(&mgr->controllers); | |
427 | } | |
428 | ||
429 | /* Initializes 'info' and populates it with information about each configured | |
430 | * primary controller. The keys in 'info' are the controllers' targets; the | |
431 | * data values are corresponding "struct ofproto_controller_info". | |
432 | * | |
433 | * The caller owns 'info' and everything in it and should free it when it is no | |
434 | * longer needed. */ | |
435 | void | |
436 | connmgr_get_controller_info(struct connmgr *mgr, struct shash *info) | |
437 | { | |
438 | const struct ofconn *ofconn; | |
439 | ||
19a87e36 BP |
440 | HMAP_FOR_EACH (ofconn, hmap_node, &mgr->controllers) { |
441 | const struct rconn *rconn = ofconn->rconn; | |
5d279086 | 442 | const char *target = rconn_get_target(rconn); |
19a87e36 | 443 | |
5d279086 AE |
444 | if (!shash_find(info, target)) { |
445 | struct ofproto_controller_info *cinfo = xmalloc(sizeof *cinfo); | |
446 | time_t now = time_now(); | |
447 | time_t last_connection = rconn_get_last_connection(rconn); | |
448 | time_t last_disconnect = rconn_get_last_disconnect(rconn); | |
449 | int last_error = rconn_get_last_error(rconn); | |
19a87e36 | 450 | |
5d279086 | 451 | shash_add(info, target, cinfo); |
19a87e36 | 452 | |
5d279086 AE |
453 | cinfo->is_connected = rconn_is_connected(rconn); |
454 | cinfo->role = ofconn->role; | |
19a87e36 | 455 | |
5d279086 | 456 | cinfo->pairs.n = 0; |
19a87e36 | 457 | |
5d279086 AE |
458 | if (last_error) { |
459 | cinfo->pairs.keys[cinfo->pairs.n] = "last_error"; | |
460 | cinfo->pairs.values[cinfo->pairs.n++] | |
461 | = xstrdup(ovs_retval_to_string(last_error)); | |
462 | } | |
19a87e36 | 463 | |
5d279086 | 464 | cinfo->pairs.keys[cinfo->pairs.n] = "state"; |
19a87e36 | 465 | cinfo->pairs.values[cinfo->pairs.n++] |
5d279086 AE |
466 | = xstrdup(rconn_get_state(rconn)); |
467 | ||
468 | if (last_connection != TIME_MIN) { | |
469 | cinfo->pairs.keys[cinfo->pairs.n] = "sec_since_connect"; | |
470 | cinfo->pairs.values[cinfo->pairs.n++] | |
471 | = xasprintf("%ld", (long int) (now - last_connection)); | |
472 | } | |
473 | ||
474 | if (last_disconnect != TIME_MIN) { | |
475 | cinfo->pairs.keys[cinfo->pairs.n] = "sec_since_disconnect"; | |
476 | cinfo->pairs.values[cinfo->pairs.n++] | |
477 | = xasprintf("%ld", (long int) (now - last_disconnect)); | |
478 | } | |
19a87e36 BP |
479 | } |
480 | } | |
481 | } | |
482 | ||
72ba2ed3 AE |
483 | void |
484 | connmgr_free_controller_info(struct shash *info) | |
485 | { | |
486 | struct shash_node *node; | |
487 | ||
488 | SHASH_FOR_EACH (node, info) { | |
489 | struct ofproto_controller_info *cinfo = node->data; | |
490 | while (cinfo->pairs.n) { | |
ebc56baa | 491 | free(CONST_CAST(char *, cinfo->pairs.values[--cinfo->pairs.n])); |
72ba2ed3 AE |
492 | } |
493 | free(cinfo); | |
494 | } | |
495 | shash_destroy(info); | |
496 | } | |
497 | ||
19a87e36 BP |
498 | /* Changes 'mgr''s set of controllers to the 'n_controllers' controllers in |
499 | * 'controllers'. */ | |
500 | void | |
501 | connmgr_set_controllers(struct connmgr *mgr, | |
502 | const struct ofproto_controller *controllers, | |
1d9ffc17 | 503 | size_t n_controllers, uint32_t allowed_versions) |
19a87e36 | 504 | { |
08fd19f0 | 505 | bool had_controllers = connmgr_has_controllers(mgr); |
19a87e36 BP |
506 | struct shash new_controllers; |
507 | struct ofconn *ofconn, *next_ofconn; | |
508 | struct ofservice *ofservice, *next_ofservice; | |
19a87e36 BP |
509 | size_t i; |
510 | ||
511 | /* Create newly configured controllers and services. | |
512 | * Create a name to ofproto_controller mapping in 'new_controllers'. */ | |
513 | shash_init(&new_controllers); | |
514 | for (i = 0; i < n_controllers; i++) { | |
515 | const struct ofproto_controller *c = &controllers[i]; | |
516 | ||
517 | if (!vconn_verify_name(c->target)) { | |
90ef0206 SH |
518 | bool add = false; |
519 | ofconn = find_controller_by_target(mgr, c->target); | |
520 | if (!ofconn) { | |
1ea9e609 BP |
521 | VLOG_INFO("%s: added primary controller \"%s\"", |
522 | mgr->name, c->target); | |
90ef0206 SH |
523 | add = true; |
524 | } else if (rconn_get_allowed_versions(ofconn->rconn) != | |
525 | allowed_versions) { | |
526 | VLOG_INFO("%s: re-added primary controller \"%s\"", | |
527 | mgr->name, c->target); | |
528 | add = true; | |
529 | ofconn_destroy(ofconn); | |
530 | } | |
531 | if (add) { | |
1d9ffc17 | 532 | add_controller(mgr, c->target, c->dscp, allowed_versions); |
19a87e36 BP |
533 | } |
534 | } else if (!pvconn_verify_name(c->target)) { | |
90ef0206 SH |
535 | bool add = false; |
536 | ofservice = ofservice_lookup(mgr, c->target); | |
537 | if (!ofservice) { | |
1ea9e609 BP |
538 | VLOG_INFO("%s: added service controller \"%s\"", |
539 | mgr->name, c->target); | |
90ef0206 SH |
540 | add = true; |
541 | } else if (ofservice->allowed_versions != allowed_versions) { | |
542 | VLOG_INFO("%s: re-added service controller \"%s\"", | |
543 | mgr->name, c->target); | |
544 | ofservice_destroy(mgr, ofservice); | |
545 | add = true; | |
546 | } | |
547 | if (add) { | |
1d9ffc17 | 548 | ofservice_create(mgr, c->target, allowed_versions, c->dscp); |
19a87e36 BP |
549 | } |
550 | } else { | |
551 | VLOG_WARN_RL(&rl, "%s: unsupported controller \"%s\"", | |
552 | mgr->name, c->target); | |
553 | continue; | |
554 | } | |
555 | ||
556 | shash_add_once(&new_controllers, c->target, &controllers[i]); | |
557 | } | |
558 | ||
559 | /* Delete controllers that are no longer configured. | |
560 | * Update configuration of all now-existing controllers. */ | |
19a87e36 | 561 | HMAP_FOR_EACH_SAFE (ofconn, next_ofconn, hmap_node, &mgr->controllers) { |
1ea9e609 | 562 | const char *target = ofconn_get_target(ofconn); |
19a87e36 BP |
563 | struct ofproto_controller *c; |
564 | ||
1ea9e609 | 565 | c = shash_find_data(&new_controllers, target); |
19a87e36 | 566 | if (!c) { |
1ea9e609 BP |
567 | VLOG_INFO("%s: removed primary controller \"%s\"", |
568 | mgr->name, target); | |
19a87e36 BP |
569 | ofconn_destroy(ofconn); |
570 | } else { | |
571 | ofconn_reconfigure(ofconn, c); | |
572 | } | |
573 | } | |
574 | ||
575 | /* Delete services that are no longer configured. | |
576 | * Update configuration of all now-existing services. */ | |
577 | HMAP_FOR_EACH_SAFE (ofservice, next_ofservice, node, &mgr->services) { | |
1ea9e609 | 578 | const char *target = pvconn_get_name(ofservice->pvconn); |
19a87e36 BP |
579 | struct ofproto_controller *c; |
580 | ||
1ea9e609 | 581 | c = shash_find_data(&new_controllers, target); |
19a87e36 | 582 | if (!c) { |
1ea9e609 BP |
583 | VLOG_INFO("%s: removed service controller \"%s\"", |
584 | mgr->name, target); | |
19a87e36 BP |
585 | ofservice_destroy(mgr, ofservice); |
586 | } else { | |
587 | ofservice_reconfigure(ofservice, c); | |
588 | } | |
589 | } | |
590 | ||
591 | shash_destroy(&new_controllers); | |
592 | ||
593 | update_in_band_remotes(mgr); | |
594 | update_fail_open(mgr); | |
08fd19f0 BP |
595 | if (had_controllers != connmgr_has_controllers(mgr)) { |
596 | ofproto_flush_flows(mgr->ofproto); | |
597 | } | |
19a87e36 BP |
598 | } |
599 | ||
600 | /* Drops the connections between 'mgr' and all of its primary and secondary | |
601 | * controllers, forcing them to reconnect. */ | |
602 | void | |
603 | connmgr_reconnect(const struct connmgr *mgr) | |
604 | { | |
605 | struct ofconn *ofconn; | |
606 | ||
607 | LIST_FOR_EACH (ofconn, node, &mgr->all_conns) { | |
608 | rconn_reconnect(ofconn->rconn); | |
609 | } | |
610 | } | |
611 | ||
612 | /* Sets the "snoops" for 'mgr' to the pvconn targets listed in 'snoops'. | |
613 | * | |
614 | * A "snoop" is a pvconn to which every OpenFlow message to or from the most | |
615 | * important controller on 'mgr' is mirrored. */ | |
616 | int | |
81e2083f | 617 | connmgr_set_snoops(struct connmgr *mgr, const struct sset *snoops) |
19a87e36 BP |
618 | { |
619 | return set_pvconns(&mgr->snoops, &mgr->n_snoops, snoops); | |
620 | } | |
621 | ||
622 | /* Adds each of the snoops currently configured on 'mgr' to 'snoops'. */ | |
623 | void | |
81e2083f | 624 | connmgr_get_snoops(const struct connmgr *mgr, struct sset *snoops) |
19a87e36 BP |
625 | { |
626 | size_t i; | |
627 | ||
628 | for (i = 0; i < mgr->n_snoops; i++) { | |
81e2083f | 629 | sset_add(snoops, pvconn_get_name(mgr->snoops[i])); |
19a87e36 BP |
630 | } |
631 | } | |
632 | ||
81e2083f BP |
633 | /* Returns true if 'mgr' has at least one snoop, false if it has none. */ |
634 | bool | |
635 | connmgr_has_snoops(const struct connmgr *mgr) | |
636 | { | |
637 | return mgr->n_snoops > 0; | |
638 | } | |
639 | ||
19a87e36 BP |
640 | /* Creates a new controller for 'target' in 'mgr'. update_controller() needs |
641 | * to be called later to finish the new ofconn's configuration. */ | |
642 | static void | |
1d9ffc17 SH |
643 | add_controller(struct connmgr *mgr, const char *target, uint8_t dscp, |
644 | uint32_t allowed_versions) | |
19a87e36 BP |
645 | { |
646 | char *name = ofconn_make_name(mgr, target); | |
647 | struct ofconn *ofconn; | |
648 | ||
1d9ffc17 | 649 | ofconn = ofconn_create(mgr, rconn_create(5, 8, dscp, allowed_versions), |
6042457b | 650 | OFCONN_PRIMARY, true); |
19a87e36 | 651 | ofconn->pktbuf = pktbuf_create(); |
19a87e36 BP |
652 | rconn_connect(ofconn->rconn, target, name); |
653 | hmap_insert(&mgr->controllers, &ofconn->hmap_node, hash_string(target, 0)); | |
654 | ||
655 | free(name); | |
656 | } | |
657 | ||
658 | static struct ofconn * | |
659 | find_controller_by_target(struct connmgr *mgr, const char *target) | |
660 | { | |
661 | struct ofconn *ofconn; | |
662 | ||
663 | HMAP_FOR_EACH_WITH_HASH (ofconn, hmap_node, | |
664 | hash_string(target, 0), &mgr->controllers) { | |
665 | if (!strcmp(ofconn_get_target(ofconn), target)) { | |
666 | return ofconn; | |
667 | } | |
668 | } | |
669 | return NULL; | |
670 | } | |
671 | ||
672 | static void | |
673 | update_in_band_remotes(struct connmgr *mgr) | |
674 | { | |
675 | struct sockaddr_in *addrs; | |
676 | size_t max_addrs, n_addrs; | |
677 | struct ofconn *ofconn; | |
678 | size_t i; | |
679 | ||
680 | /* Allocate enough memory for as many remotes as we could possibly have. */ | |
681 | max_addrs = mgr->n_extra_remotes + hmap_count(&mgr->controllers); | |
682 | addrs = xmalloc(max_addrs * sizeof *addrs); | |
683 | n_addrs = 0; | |
684 | ||
685 | /* Add all the remotes. */ | |
686 | HMAP_FOR_EACH (ofconn, hmap_node, &mgr->controllers) { | |
687 | struct sockaddr_in *sin = &addrs[n_addrs]; | |
ac4c900d | 688 | const char *target = rconn_get_target(ofconn->rconn); |
19a87e36 BP |
689 | |
690 | if (ofconn->band == OFPROTO_OUT_OF_BAND) { | |
691 | continue; | |
692 | } | |
693 | ||
ac4c900d AA |
694 | if (stream_parse_target_with_default_ports(target, |
695 | OFP_TCP_PORT, | |
696 | OFP_SSL_PORT, | |
697 | sin)) { | |
19a87e36 BP |
698 | n_addrs++; |
699 | } | |
700 | } | |
701 | for (i = 0; i < mgr->n_extra_remotes; i++) { | |
702 | addrs[n_addrs++] = mgr->extra_in_band_remotes[i]; | |
703 | } | |
704 | ||
705 | /* Create or update or destroy in-band. */ | |
706 | if (n_addrs) { | |
707 | if (!mgr->in_band) { | |
708 | in_band_create(mgr->ofproto, mgr->local_port_name, &mgr->in_band); | |
709 | } | |
19a87e36 | 710 | in_band_set_queue(mgr->in_band, mgr->in_band_queue); |
19a87e36 | 711 | } else { |
6da1e809 BP |
712 | /* in_band_run() needs a chance to delete any existing in-band flows. |
713 | * We will destroy mgr->in_band after it's done with that. */ | |
714 | } | |
715 | if (mgr->in_band) { | |
716 | in_band_set_remotes(mgr->in_band, addrs, n_addrs); | |
19a87e36 BP |
717 | } |
718 | ||
719 | /* Clean up. */ | |
720 | free(addrs); | |
721 | } | |
722 | ||
723 | static void | |
724 | update_fail_open(struct connmgr *mgr) | |
725 | { | |
726 | if (connmgr_has_controllers(mgr) | |
727 | && mgr->fail_mode == OFPROTO_FAIL_STANDALONE) { | |
728 | if (!mgr->fail_open) { | |
729 | mgr->fail_open = fail_open_create(mgr->ofproto, mgr); | |
730 | } | |
731 | } else { | |
732 | fail_open_destroy(mgr->fail_open); | |
733 | mgr->fail_open = NULL; | |
734 | } | |
735 | } | |
736 | ||
737 | static int | |
738 | set_pvconns(struct pvconn ***pvconnsp, size_t *n_pvconnsp, | |
81e2083f | 739 | const struct sset *sset) |
19a87e36 BP |
740 | { |
741 | struct pvconn **pvconns = *pvconnsp; | |
742 | size_t n_pvconns = *n_pvconnsp; | |
81e2083f | 743 | const char *name; |
19a87e36 BP |
744 | int retval = 0; |
745 | size_t i; | |
746 | ||
747 | for (i = 0; i < n_pvconns; i++) { | |
748 | pvconn_close(pvconns[i]); | |
749 | } | |
750 | free(pvconns); | |
751 | ||
81e2083f | 752 | pvconns = xmalloc(sset_count(sset) * sizeof *pvconns); |
19a87e36 | 753 | n_pvconns = 0; |
81e2083f | 754 | SSET_FOR_EACH (name, sset) { |
19a87e36 BP |
755 | struct pvconn *pvconn; |
756 | int error; | |
82c8c53c | 757 | error = pvconn_open(name, 0, 0, &pvconn); |
19a87e36 BP |
758 | if (!error) { |
759 | pvconns[n_pvconns++] = pvconn; | |
760 | } else { | |
10a89ef0 | 761 | VLOG_ERR("failed to listen on %s: %s", name, ovs_strerror(error)); |
19a87e36 BP |
762 | if (!retval) { |
763 | retval = error; | |
764 | } | |
765 | } | |
766 | } | |
767 | ||
768 | *pvconnsp = pvconns; | |
769 | *n_pvconnsp = n_pvconns; | |
770 | ||
771 | return retval; | |
772 | } | |
773 | ||
774 | /* Returns a "preference level" for snooping 'ofconn'. A higher return value | |
775 | * means that 'ofconn' is more interesting for monitoring than a lower return | |
776 | * value. */ | |
777 | static int | |
778 | snoop_preference(const struct ofconn *ofconn) | |
779 | { | |
780 | switch (ofconn->role) { | |
f4f1ea7e | 781 | case OFPCR12_ROLE_MASTER: |
19a87e36 | 782 | return 3; |
f4f1ea7e | 783 | case OFPCR12_ROLE_EQUAL: |
19a87e36 | 784 | return 2; |
f4f1ea7e | 785 | case OFPCR12_ROLE_SLAVE: |
19a87e36 | 786 | return 1; |
f4f1ea7e | 787 | case OFPCR12_ROLE_NOCHANGE: |
19a87e36 BP |
788 | default: |
789 | /* Shouldn't happen. */ | |
790 | return 0; | |
791 | } | |
792 | } | |
793 | ||
794 | /* One of 'mgr''s "snoop" pvconns has accepted a new connection on 'vconn'. | |
795 | * Connects this vconn to a controller. */ | |
796 | static void | |
797 | add_snooper(struct connmgr *mgr, struct vconn *vconn) | |
798 | { | |
799 | struct ofconn *ofconn, *best; | |
800 | ||
801 | /* Pick a controller for monitoring. */ | |
802 | best = NULL; | |
803 | LIST_FOR_EACH (ofconn, node, &mgr->all_conns) { | |
804 | if (ofconn->type == OFCONN_PRIMARY | |
805 | && (!best || snoop_preference(ofconn) > snoop_preference(best))) { | |
806 | best = ofconn; | |
807 | } | |
808 | } | |
809 | ||
810 | if (best) { | |
811 | rconn_add_monitor(best->rconn, vconn); | |
812 | } else { | |
813 | VLOG_INFO_RL(&rl, "no controller connection to snoop"); | |
814 | vconn_close(vconn); | |
815 | } | |
816 | } | |
817 | \f | |
818 | /* Public ofconn functions. */ | |
819 | ||
820 | /* Returns the connection type, either OFCONN_PRIMARY or OFCONN_SERVICE. */ | |
821 | enum ofconn_type | |
822 | ofconn_get_type(const struct ofconn *ofconn) | |
823 | { | |
824 | return ofconn->type; | |
825 | } | |
826 | ||
147cc9d3 BP |
827 | /* If a master election id is defined, stores it into '*idp' and returns |
828 | * true. Otherwise, stores UINT64_MAX into '*idp' and returns false. */ | |
829 | bool | |
830 | ofconn_get_master_election_id(const struct ofconn *ofconn, uint64_t *idp) | |
831 | { | |
832 | *idp = (ofconn->connmgr->master_election_id_defined | |
833 | ? ofconn->connmgr->master_election_id | |
834 | : UINT64_MAX); | |
835 | return ofconn->connmgr->master_election_id_defined; | |
836 | } | |
837 | ||
6ea4776b JR |
838 | /* Sets the master election id. |
839 | * | |
840 | * Returns true if successful, false if the id is stale | |
841 | */ | |
842 | bool | |
843 | ofconn_set_master_election_id(struct ofconn *ofconn, uint64_t id) | |
844 | { | |
845 | if (ofconn->connmgr->master_election_id_defined | |
846 | && | |
847 | /* Unsigned difference interpreted as a two's complement signed | |
848 | * value */ | |
849 | (int64_t)(id - ofconn->connmgr->master_election_id) < 0) { | |
850 | return false; | |
851 | } | |
852 | ofconn->connmgr->master_election_id = id; | |
853 | ofconn->connmgr->master_election_id_defined = true; | |
854 | ||
855 | return true; | |
856 | } | |
857 | ||
19a87e36 BP |
858 | /* Returns the role configured for 'ofconn'. |
859 | * | |
f4f1ea7e BP |
860 | * The default role, if no other role has been set, is OFPCR12_ROLE_EQUAL. */ |
861 | enum ofp12_controller_role | |
19a87e36 BP |
862 | ofconn_get_role(const struct ofconn *ofconn) |
863 | { | |
864 | return ofconn->role; | |
865 | } | |
866 | ||
f4f1ea7e BP |
867 | /* Changes 'ofconn''s role to 'role'. If 'role' is OFPCR12_ROLE_MASTER then |
868 | * any existing master is demoted to a slave. */ | |
19a87e36 | 869 | void |
f4f1ea7e | 870 | ofconn_set_role(struct ofconn *ofconn, enum ofp12_controller_role role) |
19a87e36 | 871 | { |
f4f1ea7e | 872 | if (role == OFPCR12_ROLE_MASTER) { |
19a87e36 BP |
873 | struct ofconn *other; |
874 | ||
875 | HMAP_FOR_EACH (other, hmap_node, &ofconn->connmgr->controllers) { | |
f4f1ea7e BP |
876 | if (other->role == OFPCR12_ROLE_MASTER) { |
877 | other->role = OFPCR12_ROLE_SLAVE; | |
19a87e36 BP |
878 | } |
879 | } | |
880 | } | |
881 | ofconn->role = role; | |
882 | } | |
883 | ||
f0fd1a17 | 884 | void |
80d5aefd | 885 | ofconn_set_invalid_ttl_to_controller(struct ofconn *ofconn, bool enable) |
f0fd1a17 | 886 | { |
80d5aefd BP |
887 | uint32_t bit = 1u << OFPR_INVALID_TTL; |
888 | if (enable) { | |
889 | ofconn->master_async_config[OAM_PACKET_IN] |= bit; | |
890 | } else { | |
891 | ofconn->master_async_config[OAM_PACKET_IN] &= ~bit; | |
892 | } | |
f0fd1a17 PS |
893 | } |
894 | ||
895 | bool | |
896 | ofconn_get_invalid_ttl_to_controller(struct ofconn *ofconn) | |
897 | { | |
80d5aefd BP |
898 | uint32_t bit = 1u << OFPR_INVALID_TTL; |
899 | return (ofconn->master_async_config[OAM_PACKET_IN] & bit) != 0; | |
f0fd1a17 PS |
900 | } |
901 | ||
27527aa0 | 902 | /* Returns the currently configured protocol for 'ofconn', one of OFPUTIL_P_*. |
19a87e36 | 903 | * |
eb12aa89 BP |
904 | * Returns OFPUTIL_P_NONE, which is not a valid protocol, if 'ofconn' hasn't |
905 | * completed version negotiation. This can't happen if at least one OpenFlow | |
906 | * message, other than OFPT_HELLO, has been received on the connection (such as | |
907 | * in ofproto.c's message handling code), since version negotiation is a | |
908 | * prerequisite for starting to receive messages. This means that | |
909 | * OFPUTIL_P_NONE is a special case that most callers need not worry about. */ | |
27527aa0 | 910 | enum ofputil_protocol |
e3d560db | 911 | ofconn_get_protocol(const struct ofconn *ofconn) |
19a87e36 | 912 | { |
eb12aa89 BP |
913 | if (ofconn->protocol == OFPUTIL_P_NONE && |
914 | rconn_is_connected(ofconn->rconn)) { | |
915 | int version = rconn_get_version(ofconn->rconn); | |
916 | if (version > 0) { | |
917 | ofconn_set_protocol(CONST_CAST(struct ofconn *, ofconn), | |
918 | ofputil_protocol_from_ofp_version(version)); | |
919 | } | |
920 | } | |
921 | ||
27527aa0 | 922 | return ofconn->protocol; |
19a87e36 BP |
923 | } |
924 | ||
27527aa0 BP |
925 | /* Sets the protocol for 'ofconn' to 'protocol' (one of OFPUTIL_P_*). |
926 | * | |
927 | * (This doesn't actually send anything to accomplish this. Presumably the | |
928 | * caller already did that.) */ | |
19a87e36 | 929 | void |
27527aa0 | 930 | ofconn_set_protocol(struct ofconn *ofconn, enum ofputil_protocol protocol) |
19a87e36 | 931 | { |
27527aa0 | 932 | ofconn->protocol = protocol; |
19a87e36 BP |
933 | } |
934 | ||
54834960 EJ |
935 | /* Returns the currently configured packet in format for 'ofconn', one of |
936 | * NXPIF_*. | |
937 | * | |
938 | * The default, if no other format has been set, is NXPIF_OPENFLOW10. */ | |
939 | enum nx_packet_in_format | |
940 | ofconn_get_packet_in_format(struct ofconn *ofconn) | |
941 | { | |
942 | return ofconn->packet_in_format; | |
943 | } | |
944 | ||
945 | /* Sets the packet in format for 'ofconn' to 'packet_in_format' (one of | |
946 | * NXPIF_*). */ | |
947 | void | |
948 | ofconn_set_packet_in_format(struct ofconn *ofconn, | |
949 | enum nx_packet_in_format packet_in_format) | |
950 | { | |
951 | ofconn->packet_in_format = packet_in_format; | |
952 | } | |
953 | ||
a7349929 BP |
954 | /* Sets the controller connection ID for 'ofconn' to 'controller_id'. |
955 | * | |
956 | * The connection controller ID is used for OFPP_CONTROLLER and | |
957 | * NXAST_CONTROLLER actions. See "struct nx_action_controller" for details. */ | |
958 | void | |
959 | ofconn_set_controller_id(struct ofconn *ofconn, uint16_t controller_id) | |
960 | { | |
961 | ofconn->controller_id = controller_id; | |
962 | } | |
963 | ||
19a87e36 BP |
964 | /* Returns the default miss send length for 'ofconn'. */ |
965 | int | |
966 | ofconn_get_miss_send_len(const struct ofconn *ofconn) | |
967 | { | |
968 | return ofconn->miss_send_len; | |
969 | } | |
970 | ||
971 | /* Sets the default miss send length for 'ofconn' to 'miss_send_len'. */ | |
972 | void | |
973 | ofconn_set_miss_send_len(struct ofconn *ofconn, int miss_send_len) | |
974 | { | |
975 | ofconn->miss_send_len = miss_send_len; | |
976 | } | |
977 | ||
80d5aefd BP |
978 | void |
979 | ofconn_set_async_config(struct ofconn *ofconn, | |
980 | const uint32_t master_masks[OAM_N_TYPES], | |
981 | const uint32_t slave_masks[OAM_N_TYPES]) | |
982 | { | |
983 | size_t size = sizeof ofconn->master_async_config; | |
984 | memcpy(ofconn->master_async_config, master_masks, size); | |
985 | memcpy(ofconn->slave_async_config, slave_masks, size); | |
986 | } | |
987 | ||
c423b3b3 AC |
988 | void |
989 | ofconn_get_async_config(struct ofconn *ofconn, | |
990 | uint32_t *master_masks, uint32_t *slave_masks) | |
991 | { | |
992 | size_t size = sizeof ofconn->master_async_config; | |
993 | memcpy(master_masks, ofconn->master_async_config, size); | |
994 | memcpy(slave_masks, ofconn->slave_async_config, size); | |
995 | } | |
996 | ||
19a87e36 BP |
997 | /* Sends 'msg' on 'ofconn', accounting it as a reply. (If there is a |
998 | * sufficient number of OpenFlow replies in-flight on a single ofconn, then the | |
999 | * connmgr will stop accepting new OpenFlow requests on that ofconn until the | |
1000 | * controller has accepted some of the replies.) */ | |
1001 | void | |
1002 | ofconn_send_reply(const struct ofconn *ofconn, struct ofpbuf *msg) | |
1003 | { | |
1004 | ofconn_send(ofconn, msg, ofconn->reply_counter); | |
1005 | } | |
1006 | ||
63f2140a BP |
1007 | /* Sends each of the messages in list 'replies' on 'ofconn' in order, |
1008 | * accounting them as replies. */ | |
1009 | void | |
1010 | ofconn_send_replies(const struct ofconn *ofconn, struct list *replies) | |
1011 | { | |
1012 | struct ofpbuf *reply, *next; | |
1013 | ||
1014 | LIST_FOR_EACH_SAFE (reply, next, list_node, replies) { | |
1015 | list_remove(&reply->list_node); | |
1016 | ofconn_send_reply(ofconn, reply); | |
1017 | } | |
1018 | } | |
1019 | ||
90bf1e07 | 1020 | /* Sends 'error' on 'ofconn', as a reply to 'request'. Only at most the |
1be5ff75 BP |
1021 | * first 64 bytes of 'request' are used. */ |
1022 | void | |
1023 | ofconn_send_error(const struct ofconn *ofconn, | |
90bf1e07 | 1024 | const struct ofp_header *request, enum ofperr error) |
1be5ff75 | 1025 | { |
07c8ec21 | 1026 | static struct vlog_rate_limit err_rl = VLOG_RATE_LIMIT_INIT(10, 10); |
90bf1e07 | 1027 | struct ofpbuf *reply; |
76589937 | 1028 | |
90bf1e07 | 1029 | reply = ofperr_encode_reply(error, request); |
07c8ec21 BP |
1030 | if (!VLOG_DROP_INFO(&err_rl)) { |
1031 | const char *type_name; | |
1032 | size_t request_len; | |
1033 | enum ofpraw raw; | |
1034 | ||
1035 | request_len = ntohs(request->length); | |
1036 | type_name = (!ofpraw_decode_partial(&raw, request, | |
1037 | MIN(64, request_len)) | |
1038 | ? ofpraw_get_name(raw) | |
1039 | : "invalid"); | |
1040 | ||
1041 | VLOG_INFO("%s: sending %s error reply to %s message", | |
1042 | rconn_get_name(ofconn->rconn), ofperr_to_string(error), | |
1043 | type_name); | |
1044 | } | |
1045 | ofconn_send_reply(ofconn, reply); | |
1be5ff75 BP |
1046 | } |
1047 | ||
19a87e36 | 1048 | /* Same as pktbuf_retrieve(), using the pktbuf owned by 'ofconn'. */ |
90bf1e07 | 1049 | enum ofperr |
19a87e36 | 1050 | ofconn_pktbuf_retrieve(struct ofconn *ofconn, uint32_t id, |
4e022ec0 | 1051 | struct ofpbuf **bufferp, ofp_port_t *in_port) |
19a87e36 BP |
1052 | { |
1053 | return pktbuf_retrieve(ofconn->pktbuf, id, bufferp, in_port); | |
1054 | } | |
7ee20df1 BP |
1055 | |
1056 | /* Returns true if 'ofconn' has any pending opgroups. */ | |
1057 | bool | |
1058 | ofconn_has_pending_opgroups(const struct ofconn *ofconn) | |
1059 | { | |
1060 | return !list_is_empty(&ofconn->opgroups); | |
1061 | } | |
1062 | ||
7ee20df1 BP |
1063 | /* Adds 'ofconn_node' to 'ofconn''s list of pending opgroups. |
1064 | * | |
1065 | * If 'ofconn' is destroyed or its connection drops, then 'ofconn' will remove | |
1066 | * 'ofconn_node' from the list and re-initialize it with list_init(). The | |
1067 | * client may, therefore, use list_is_empty(ofconn_node) to determine whether | |
1068 | * 'ofconn_node' is still associated with an active ofconn. | |
1069 | * | |
1070 | * The client may also remove ofconn_node from the list itself, with | |
1071 | * list_remove(). */ | |
1072 | void | |
1073 | ofconn_add_opgroup(struct ofconn *ofconn, struct list *ofconn_node) | |
1074 | { | |
1075 | list_push_back(&ofconn->opgroups, ofconn_node); | |
1076 | } | |
19a87e36 BP |
1077 | \f |
1078 | /* Private ofconn functions. */ | |
1079 | ||
1080 | static const char * | |
1081 | ofconn_get_target(const struct ofconn *ofconn) | |
1082 | { | |
1083 | return rconn_get_target(ofconn->rconn); | |
1084 | } | |
1085 | ||
1086 | static struct ofconn * | |
9886b662 BP |
1087 | ofconn_create(struct connmgr *mgr, struct rconn *rconn, enum ofconn_type type, |
1088 | bool enable_async_msgs) | |
19a87e36 | 1089 | { |
c4b31872 BP |
1090 | struct ofconn *ofconn; |
1091 | ||
1092 | ofconn = xzalloc(sizeof *ofconn); | |
19a87e36 BP |
1093 | ofconn->connmgr = mgr; |
1094 | list_push_back(&mgr->all_conns, &ofconn->node); | |
1095 | ofconn->rconn = rconn; | |
1096 | ofconn->type = type; | |
9886b662 | 1097 | ofconn->enable_async_msgs = enable_async_msgs; |
c4b31872 | 1098 | |
7ee20df1 | 1099 | list_init(&ofconn->opgroups); |
c4b31872 | 1100 | |
2b07c8b1 BP |
1101 | hmap_init(&ofconn->monitors); |
1102 | list_init(&ofconn->updates); | |
1103 | ||
c4b31872 BP |
1104 | ofconn_flush(ofconn); |
1105 | ||
19a87e36 BP |
1106 | return ofconn; |
1107 | } | |
1108 | ||
c4b31872 BP |
1109 | /* Clears all of the state in 'ofconn' that should not persist from one |
1110 | * connection to the next. */ | |
7ee20df1 BP |
1111 | static void |
1112 | ofconn_flush(struct ofconn *ofconn) | |
1113 | { | |
2b07c8b1 | 1114 | struct ofmonitor *monitor, *next_monitor; |
c4b31872 BP |
1115 | int i; |
1116 | ||
f4f1ea7e | 1117 | ofconn->role = OFPCR12_ROLE_EQUAL; |
eb12aa89 | 1118 | ofconn_set_protocol(ofconn, OFPUTIL_P_NONE); |
c4b31872 | 1119 | ofconn->packet_in_format = NXPIF_OPENFLOW10; |
c4b31872 BP |
1120 | |
1121 | /* Disassociate 'ofconn' from all of the ofopgroups that it initiated that | |
1122 | * have not yet completed. (Those ofopgroups will still run to completion | |
1123 | * in the usual way, but any errors that they run into will not be reported | |
1124 | * on any OpenFlow channel.) | |
1125 | * | |
1126 | * Also discard any blocked operation on 'ofconn'. */ | |
7ee20df1 BP |
1127 | while (!list_is_empty(&ofconn->opgroups)) { |
1128 | list_init(list_pop_front(&ofconn->opgroups)); | |
1129 | } | |
1130 | ofpbuf_delete(ofconn->blocked); | |
1131 | ofconn->blocked = NULL; | |
c4b31872 BP |
1132 | |
1133 | rconn_packet_counter_destroy(ofconn->packet_in_counter); | |
1134 | ofconn->packet_in_counter = rconn_packet_counter_create(); | |
1135 | for (i = 0; i < N_SCHEDULERS; i++) { | |
1136 | if (ofconn->schedulers[i]) { | |
1137 | int rate, burst; | |
1138 | ||
1139 | pinsched_get_limits(ofconn->schedulers[i], &rate, &burst); | |
1140 | pinsched_destroy(ofconn->schedulers[i]); | |
1141 | ofconn->schedulers[i] = pinsched_create(rate, burst); | |
1142 | } | |
1143 | } | |
1144 | if (ofconn->pktbuf) { | |
1145 | pktbuf_destroy(ofconn->pktbuf); | |
1146 | ofconn->pktbuf = pktbuf_create(); | |
1147 | } | |
1148 | ofconn->miss_send_len = (ofconn->type == OFCONN_PRIMARY | |
1149 | ? OFP_DEFAULT_MISS_SEND_LEN | |
1150 | : 0); | |
a7349929 | 1151 | ofconn->controller_id = 0; |
c4b31872 BP |
1152 | |
1153 | rconn_packet_counter_destroy(ofconn->reply_counter); | |
1154 | ofconn->reply_counter = rconn_packet_counter_create(); | |
80d5aefd | 1155 | |
9886b662 BP |
1156 | if (ofconn->enable_async_msgs) { |
1157 | uint32_t *master = ofconn->master_async_config; | |
1158 | uint32_t *slave = ofconn->slave_async_config; | |
1159 | ||
1160 | /* "master" and "other" roles get all asynchronous messages by default, | |
1161 | * except that the controller needs to enable nonstandard "packet-in" | |
1162 | * reasons itself. */ | |
1163 | master[OAM_PACKET_IN] = (1u << OFPR_NO_MATCH) | (1u << OFPR_ACTION); | |
1164 | master[OAM_PORT_STATUS] = ((1u << OFPPR_ADD) | |
1165 | | (1u << OFPPR_DELETE) | |
1166 | | (1u << OFPPR_MODIFY)); | |
1167 | master[OAM_FLOW_REMOVED] = ((1u << OFPRR_IDLE_TIMEOUT) | |
1168 | | (1u << OFPRR_HARD_TIMEOUT) | |
1169 | | (1u << OFPRR_DELETE)); | |
1170 | ||
1171 | /* "slave" role gets port status updates by default. */ | |
1172 | slave[OAM_PACKET_IN] = 0; | |
1173 | slave[OAM_PORT_STATUS] = ((1u << OFPPR_ADD) | |
1174 | | (1u << OFPPR_DELETE) | |
1175 | | (1u << OFPPR_MODIFY)); | |
1176 | slave[OAM_FLOW_REMOVED] = 0; | |
1177 | } else { | |
1178 | memset(ofconn->master_async_config, 0, | |
1179 | sizeof ofconn->master_async_config); | |
1180 | memset(ofconn->slave_async_config, 0, | |
1181 | sizeof ofconn->slave_async_config); | |
1182 | } | |
2b07c8b1 BP |
1183 | |
1184 | HMAP_FOR_EACH_SAFE (monitor, next_monitor, ofconn_node, | |
1185 | &ofconn->monitors) { | |
1186 | ofmonitor_destroy(monitor); | |
1187 | } | |
1188 | rconn_packet_counter_destroy(ofconn->monitor_counter); | |
1189 | ofconn->monitor_counter = rconn_packet_counter_create(); | |
1190 | ofpbuf_list_delete(&ofconn->updates); /* ...but it should be empty. */ | |
7ee20df1 BP |
1191 | } |
1192 | ||
19a87e36 BP |
1193 | static void |
1194 | ofconn_destroy(struct ofconn *ofconn) | |
1195 | { | |
7ee20df1 BP |
1196 | ofconn_flush(ofconn); |
1197 | ||
19a87e36 BP |
1198 | if (ofconn->type == OFCONN_PRIMARY) { |
1199 | hmap_remove(&ofconn->connmgr->controllers, &ofconn->hmap_node); | |
1200 | } | |
1201 | ||
92bbc96a | 1202 | hmap_destroy(&ofconn->monitors); |
19a87e36 BP |
1203 | list_remove(&ofconn->node); |
1204 | rconn_destroy(ofconn->rconn); | |
1205 | rconn_packet_counter_destroy(ofconn->packet_in_counter); | |
1206 | rconn_packet_counter_destroy(ofconn->reply_counter); | |
1207 | pktbuf_destroy(ofconn->pktbuf); | |
2b07c8b1 | 1208 | rconn_packet_counter_destroy(ofconn->monitor_counter); |
19a87e36 BP |
1209 | free(ofconn); |
1210 | } | |
1211 | ||
1212 | /* Reconfigures 'ofconn' to match 'c'. 'ofconn' and 'c' must have the same | |
1213 | * target. */ | |
1214 | static void | |
1215 | ofconn_reconfigure(struct ofconn *ofconn, const struct ofproto_controller *c) | |
1216 | { | |
1217 | int probe_interval; | |
1218 | ||
1219 | ofconn->band = c->band; | |
065825e9 | 1220 | ofconn->enable_async_msgs = c->enable_async_msgs; |
19a87e36 BP |
1221 | |
1222 | rconn_set_max_backoff(ofconn->rconn, c->max_backoff); | |
1223 | ||
1224 | probe_interval = c->probe_interval ? MAX(c->probe_interval, 5) : 0; | |
1225 | rconn_set_probe_interval(ofconn->rconn, probe_interval); | |
1226 | ||
1227 | ofconn_set_rate_limit(ofconn, c->rate_limit, c->burst_limit); | |
0442efd9 MM |
1228 | |
1229 | /* If dscp value changed reconnect. */ | |
1230 | if (c->dscp != rconn_get_dscp(ofconn->rconn)) { | |
1231 | rconn_set_dscp(ofconn->rconn, c->dscp); | |
1232 | rconn_reconnect(ofconn->rconn); | |
1233 | } | |
19a87e36 BP |
1234 | } |
1235 | ||
7ee20df1 BP |
1236 | /* Returns true if it makes sense for 'ofconn' to receive and process OpenFlow |
1237 | * messages. */ | |
1238 | static bool | |
1239 | ofconn_may_recv(const struct ofconn *ofconn) | |
1240 | { | |
a6441685 | 1241 | int count = ofconn->reply_counter->n_packets; |
7ee20df1 BP |
1242 | return (!ofconn->blocked || ofconn->retry) && count < OFCONN_REPLY_MAX; |
1243 | } | |
1244 | ||
19a87e36 BP |
1245 | static void |
1246 | ofconn_run(struct ofconn *ofconn, | |
e03248b7 JR |
1247 | bool (*handle_openflow)(struct ofconn *, |
1248 | const struct ofpbuf *ofp_msg)) | |
19a87e36 BP |
1249 | { |
1250 | struct connmgr *mgr = ofconn->connmgr; | |
19a87e36 BP |
1251 | size_t i; |
1252 | ||
1253 | for (i = 0; i < N_SCHEDULERS; i++) { | |
1254 | pinsched_run(ofconn->schedulers[i], do_send_packet_in, ofconn); | |
1255 | } | |
1256 | ||
1257 | rconn_run(ofconn->rconn); | |
1258 | ||
7ee20df1 BP |
1259 | if (handle_openflow) { |
1260 | /* Limit the number of iterations to avoid starving other tasks. */ | |
1261 | for (i = 0; i < 50 && ofconn_may_recv(ofconn); i++) { | |
1262 | struct ofpbuf *of_msg; | |
1263 | ||
1264 | of_msg = (ofconn->blocked | |
1265 | ? ofconn->blocked | |
1266 | : rconn_recv(ofconn->rconn)); | |
19a87e36 BP |
1267 | if (!of_msg) { |
1268 | break; | |
1269 | } | |
1270 | if (mgr->fail_open) { | |
1271 | fail_open_maybe_recover(mgr->fail_open); | |
1272 | } | |
7ee20df1 BP |
1273 | |
1274 | if (handle_openflow(ofconn, of_msg)) { | |
1275 | ofpbuf_delete(of_msg); | |
1276 | ofconn->blocked = NULL; | |
1277 | } else { | |
1278 | ofconn->blocked = of_msg; | |
1279 | ofconn->retry = false; | |
1280 | } | |
19a87e36 BP |
1281 | } |
1282 | } | |
1283 | ||
1284 | if (!rconn_is_alive(ofconn->rconn)) { | |
1285 | ofconn_destroy(ofconn); | |
7ee20df1 BP |
1286 | } else if (!rconn_is_connected(ofconn->rconn)) { |
1287 | ofconn_flush(ofconn); | |
19a87e36 BP |
1288 | } |
1289 | } | |
1290 | ||
1291 | static void | |
7ee20df1 | 1292 | ofconn_wait(struct ofconn *ofconn, bool handling_openflow) |
19a87e36 BP |
1293 | { |
1294 | int i; | |
1295 | ||
1296 | for (i = 0; i < N_SCHEDULERS; i++) { | |
1297 | pinsched_wait(ofconn->schedulers[i]); | |
1298 | } | |
1299 | rconn_run_wait(ofconn->rconn); | |
7ee20df1 | 1300 | if (handling_openflow && ofconn_may_recv(ofconn)) { |
19a87e36 | 1301 | rconn_recv_wait(ofconn->rconn); |
19a87e36 BP |
1302 | } |
1303 | } | |
1304 | ||
80d5aefd BP |
1305 | /* Returns true if 'ofconn' should receive asynchronous messages of the given |
1306 | * OAM_* 'type' and 'reason', which should be a OFPR_* value for OAM_PACKET_IN, | |
1307 | * a OFPPR_* value for OAM_PORT_STATUS, or an OFPRR_* value for | |
1308 | * OAM_FLOW_REMOVED. Returns false if the message should not be sent on | |
1309 | * 'ofconn'. */ | |
19a87e36 | 1310 | static bool |
80d5aefd BP |
1311 | ofconn_receives_async_msg(const struct ofconn *ofconn, |
1312 | enum ofconn_async_msg_type type, | |
1313 | unsigned int reason) | |
19a87e36 | 1314 | { |
80d5aefd BP |
1315 | const uint32_t *async_config; |
1316 | ||
cb22974d BP |
1317 | ovs_assert(reason < 32); |
1318 | ovs_assert((unsigned int) type < OAM_N_TYPES); | |
19a87e36 | 1319 | |
eb12aa89 BP |
1320 | if (ofconn_get_protocol(ofconn) == OFPUTIL_P_NONE |
1321 | || !rconn_is_connected(ofconn->rconn)) { | |
f0fd1a17 | 1322 | return false; |
f0fd1a17 | 1323 | } |
f0fd1a17 | 1324 | |
80d5aefd BP |
1325 | /* Keep the following code in sync with the documentation in the |
1326 | * "Asynchronous Messages" section in DESIGN. */ | |
1327 | ||
1328 | if (ofconn->type == OFCONN_SERVICE && !ofconn->miss_send_len) { | |
1329 | /* Service connections don't get asynchronous messages unless they have | |
1330 | * explicitly asked for them by setting a nonzero miss send length. */ | |
f0fd1a17 | 1331 | return false; |
f0fd1a17 | 1332 | } |
80d5aefd | 1333 | |
f4f1ea7e | 1334 | async_config = (ofconn->role == OFPCR12_ROLE_SLAVE |
80d5aefd BP |
1335 | ? ofconn->slave_async_config |
1336 | : ofconn->master_async_config); | |
1337 | if (!(async_config[type] & (1u << reason))) { | |
1338 | return false; | |
1339 | } | |
1340 | ||
1341 | return true; | |
f0fd1a17 PS |
1342 | } |
1343 | ||
19a87e36 BP |
1344 | /* Returns a human-readable name for an OpenFlow connection between 'mgr' and |
1345 | * 'target', suitable for use in log messages for identifying the connection. | |
1346 | * | |
1347 | * The name is dynamically allocated. The caller should free it (with free()) | |
1348 | * when it is no longer needed. */ | |
1349 | static char * | |
1350 | ofconn_make_name(const struct connmgr *mgr, const char *target) | |
1351 | { | |
1352 | return xasprintf("%s<->%s", mgr->name, target); | |
1353 | } | |
1354 | ||
1355 | static void | |
1356 | ofconn_set_rate_limit(struct ofconn *ofconn, int rate, int burst) | |
1357 | { | |
1358 | int i; | |
1359 | ||
1360 | for (i = 0; i < N_SCHEDULERS; i++) { | |
1361 | struct pinsched **s = &ofconn->schedulers[i]; | |
1362 | ||
1363 | if (rate > 0) { | |
1364 | if (!*s) { | |
1365 | *s = pinsched_create(rate, burst); | |
1366 | } else { | |
1367 | pinsched_set_limits(*s, rate, burst); | |
1368 | } | |
1369 | } else { | |
1370 | pinsched_destroy(*s); | |
1371 | *s = NULL; | |
1372 | } | |
1373 | } | |
1374 | } | |
1375 | ||
1376 | static void | |
1377 | ofconn_send(const struct ofconn *ofconn, struct ofpbuf *msg, | |
1378 | struct rconn_packet_counter *counter) | |
1379 | { | |
982697a4 | 1380 | ofpmsg_update_length(msg); |
acb9da40 | 1381 | rconn_send(ofconn->rconn, msg, counter); |
19a87e36 BP |
1382 | } |
1383 | \f | |
1384 | /* Sending asynchronous messages. */ | |
1385 | ||
d8653c38 | 1386 | static void schedule_packet_in(struct ofconn *, struct ofputil_packet_in); |
19a87e36 BP |
1387 | |
1388 | /* Sends an OFPT_PORT_STATUS message with 'opp' and 'reason' to appropriate | |
9cfcdadf | 1389 | * controllers managed by 'mgr'. */ |
19a87e36 | 1390 | void |
9e1fd49b BP |
1391 | connmgr_send_port_status(struct connmgr *mgr, |
1392 | const struct ofputil_phy_port *pp, uint8_t reason) | |
19a87e36 BP |
1393 | { |
1394 | /* XXX Should limit the number of queued port status change messages. */ | |
9e1fd49b | 1395 | struct ofputil_port_status ps; |
19a87e36 BP |
1396 | struct ofconn *ofconn; |
1397 | ||
9e1fd49b BP |
1398 | ps.reason = reason; |
1399 | ps.desc = *pp; | |
19a87e36 | 1400 | LIST_FOR_EACH (ofconn, node, &mgr->all_conns) { |
80d5aefd | 1401 | if (ofconn_receives_async_msg(ofconn, OAM_PORT_STATUS, reason)) { |
9e1fd49b | 1402 | struct ofpbuf *msg; |
80d5aefd | 1403 | |
eb12aa89 | 1404 | msg = ofputil_encode_port_status(&ps, ofconn_get_protocol(ofconn)); |
9e1fd49b | 1405 | ofconn_send(ofconn, msg, NULL); |
19a87e36 | 1406 | } |
19a87e36 BP |
1407 | } |
1408 | } | |
1409 | ||
1410 | /* Sends an OFPT_FLOW_REMOVED or NXT_FLOW_REMOVED message based on 'fr' to | |
1411 | * appropriate controllers managed by 'mgr'. */ | |
1412 | void | |
1413 | connmgr_send_flow_removed(struct connmgr *mgr, | |
1414 | const struct ofputil_flow_removed *fr) | |
1415 | { | |
1416 | struct ofconn *ofconn; | |
1417 | ||
1418 | LIST_FOR_EACH (ofconn, node, &mgr->all_conns) { | |
80d5aefd BP |
1419 | if (ofconn_receives_async_msg(ofconn, OAM_FLOW_REMOVED, fr->reason)) { |
1420 | struct ofpbuf *msg; | |
1421 | ||
1422 | /* Account flow expirations as replies to OpenFlow requests. That | |
1423 | * works because preventing OpenFlow requests from being processed | |
1424 | * also prevents new flows from being added (and expiring). (It | |
1425 | * also prevents processing OpenFlow requests that would not add | |
1426 | * new flows, so it is imperfect.) */ | |
eb12aa89 | 1427 | msg = ofputil_encode_flow_removed(fr, ofconn_get_protocol(ofconn)); |
80d5aefd | 1428 | ofconn_send_reply(ofconn, msg); |
19a87e36 | 1429 | } |
19a87e36 BP |
1430 | } |
1431 | } | |
1432 | ||
78bd1cd0 | 1433 | /* Given 'pin', sends an OFPT_PACKET_IN message to each OpenFlow controller as |
2ed1202f BP |
1434 | * necessary according to their individual configurations. |
1435 | * | |
1436 | * The caller doesn't need to fill in pin->buffer_id or pin->total_len. */ | |
19a87e36 | 1437 | void |
78bd1cd0 | 1438 | connmgr_send_packet_in(struct connmgr *mgr, |
d8653c38 | 1439 | const struct ofputil_packet_in *pin) |
19a87e36 | 1440 | { |
29ebe880 | 1441 | struct ofconn *ofconn; |
19a87e36 | 1442 | |
19a87e36 | 1443 | LIST_FOR_EACH (ofconn, node, &mgr->all_conns) { |
a7349929 BP |
1444 | if (ofconn_receives_async_msg(ofconn, OAM_PACKET_IN, pin->reason) |
1445 | && ofconn->controller_id == pin->controller_id) { | |
d8653c38 | 1446 | schedule_packet_in(ofconn, *pin); |
19a87e36 BP |
1447 | } |
1448 | } | |
19a87e36 BP |
1449 | } |
1450 | ||
1451 | /* pinsched callback for sending 'ofp_packet_in' on 'ofconn'. */ | |
1452 | static void | |
1453 | do_send_packet_in(struct ofpbuf *ofp_packet_in, void *ofconn_) | |
1454 | { | |
1455 | struct ofconn *ofconn = ofconn_; | |
1456 | ||
1457 | rconn_send_with_limit(ofconn->rconn, ofp_packet_in, | |
1458 | ofconn->packet_in_counter, 100); | |
1459 | } | |
1460 | ||
d8653c38 BP |
1461 | /* Takes 'pin', composes an OpenFlow packet-in message from it, and passes it |
1462 | * to 'ofconn''s packet scheduler for sending. */ | |
19a87e36 | 1463 | static void |
d8653c38 | 1464 | schedule_packet_in(struct ofconn *ofconn, struct ofputil_packet_in pin) |
19a87e36 BP |
1465 | { |
1466 | struct connmgr *mgr = ofconn->connmgr; | |
19a87e36 | 1467 | |
2ed1202f BP |
1468 | pin.total_len = pin.packet_len; |
1469 | ||
19a87e36 | 1470 | /* Get OpenFlow buffer_id. */ |
78bd1cd0 | 1471 | if (pin.reason == OFPR_ACTION) { |
19a87e36 BP |
1472 | pin.buffer_id = UINT32_MAX; |
1473 | } else if (mgr->fail_open && fail_open_is_active(mgr->fail_open)) { | |
1474 | pin.buffer_id = pktbuf_get_null(); | |
1475 | } else if (!ofconn->pktbuf) { | |
1476 | pin.buffer_id = UINT32_MAX; | |
1477 | } else { | |
3e3252fa | 1478 | pin.buffer_id = pktbuf_save(ofconn->pktbuf, pin.packet, pin.packet_len, |
d8653c38 | 1479 | pin.fmd.in_port); |
19a87e36 BP |
1480 | } |
1481 | ||
1482 | /* Figure out how much of the packet to send. */ | |
78bd1cd0 | 1483 | if (pin.reason == OFPR_NO_MATCH) { |
3e3252fa | 1484 | pin.send_len = pin.packet_len; |
78bd1cd0 BP |
1485 | } else { |
1486 | /* Caller should have initialized 'send_len' to 'max_len' specified in | |
d01c980f | 1487 | * output action. */ |
78bd1cd0 | 1488 | } |
19a87e36 BP |
1489 | if (pin.buffer_id != UINT32_MAX) { |
1490 | pin.send_len = MIN(pin.send_len, ofconn->miss_send_len); | |
1491 | } | |
19a87e36 BP |
1492 | |
1493 | /* Make OFPT_PACKET_IN and hand over to packet scheduler. It might | |
1494 | * immediately call into do_send_packet_in() or it might buffer it for a | |
1495 | * while (until a later call to pinsched_run()). */ | |
78bd1cd0 | 1496 | pinsched_send(ofconn->schedulers[pin.reason == OFPR_NO_MATCH ? 0 : 1], |
d8653c38 | 1497 | pin.fmd.in_port, |
eb12aa89 | 1498 | ofputil_encode_packet_in(&pin, ofconn_get_protocol(ofconn), |
d94240ec | 1499 | ofconn->packet_in_format), |
19a87e36 BP |
1500 | do_send_packet_in, ofconn); |
1501 | } | |
1502 | \f | |
1503 | /* Fail-open settings. */ | |
1504 | ||
1505 | /* Returns the failure handling mode (OFPROTO_FAIL_SECURE or | |
1506 | * OFPROTO_FAIL_STANDALONE) for 'mgr'. */ | |
1507 | enum ofproto_fail_mode | |
1508 | connmgr_get_fail_mode(const struct connmgr *mgr) | |
1509 | { | |
1510 | return mgr->fail_mode; | |
1511 | } | |
1512 | ||
1513 | /* Sets the failure handling mode for 'mgr' to 'fail_mode' (either | |
1514 | * OFPROTO_FAIL_SECURE or OFPROTO_FAIL_STANDALONE). */ | |
1515 | void | |
1516 | connmgr_set_fail_mode(struct connmgr *mgr, enum ofproto_fail_mode fail_mode) | |
1517 | { | |
08fd19f0 BP |
1518 | if (mgr->fail_mode != fail_mode) { |
1519 | mgr->fail_mode = fail_mode; | |
1520 | update_fail_open(mgr); | |
1521 | if (!connmgr_has_controllers(mgr)) { | |
1522 | ofproto_flush_flows(mgr->ofproto); | |
1523 | } | |
1524 | } | |
19a87e36 BP |
1525 | } |
1526 | \f | |
1527 | /* Fail-open implementation. */ | |
1528 | ||
1529 | /* Returns the longest probe interval among the primary controllers configured | |
1530 | * on 'mgr'. Returns 0 if there are no primary controllers. */ | |
1531 | int | |
1532 | connmgr_get_max_probe_interval(const struct connmgr *mgr) | |
1533 | { | |
1534 | const struct ofconn *ofconn; | |
1535 | int max_probe_interval; | |
1536 | ||
1537 | max_probe_interval = 0; | |
1538 | HMAP_FOR_EACH (ofconn, hmap_node, &mgr->controllers) { | |
1539 | int probe_interval = rconn_get_probe_interval(ofconn->rconn); | |
1540 | max_probe_interval = MAX(max_probe_interval, probe_interval); | |
1541 | } | |
1542 | return max_probe_interval; | |
1543 | } | |
1544 | ||
1545 | /* Returns the number of seconds for which all of 'mgr's primary controllers | |
1546 | * have been disconnected. Returns 0 if 'mgr' has no primary controllers. */ | |
1547 | int | |
1548 | connmgr_failure_duration(const struct connmgr *mgr) | |
1549 | { | |
1550 | const struct ofconn *ofconn; | |
1551 | int min_failure_duration; | |
1552 | ||
1553 | if (!connmgr_has_controllers(mgr)) { | |
1554 | return 0; | |
1555 | } | |
1556 | ||
1557 | min_failure_duration = INT_MAX; | |
1558 | HMAP_FOR_EACH (ofconn, hmap_node, &mgr->controllers) { | |
1559 | int failure_duration = rconn_failure_duration(ofconn->rconn); | |
1560 | min_failure_duration = MIN(min_failure_duration, failure_duration); | |
1561 | } | |
1562 | return min_failure_duration; | |
1563 | } | |
1564 | ||
1565 | /* Returns true if at least one primary controller is connected (regardless of | |
1566 | * whether those controllers are believed to have authenticated and accepted | |
1567 | * this switch), false if none of them are connected. */ | |
1568 | bool | |
1569 | connmgr_is_any_controller_connected(const struct connmgr *mgr) | |
1570 | { | |
1571 | const struct ofconn *ofconn; | |
1572 | ||
1573 | HMAP_FOR_EACH (ofconn, hmap_node, &mgr->controllers) { | |
1574 | if (rconn_is_connected(ofconn->rconn)) { | |
1575 | return true; | |
1576 | } | |
1577 | } | |
1578 | return false; | |
1579 | } | |
1580 | ||
1581 | /* Returns true if at least one primary controller is believed to have | |
1582 | * authenticated and accepted this switch, false otherwise. */ | |
1583 | bool | |
1584 | connmgr_is_any_controller_admitted(const struct connmgr *mgr) | |
1585 | { | |
1586 | const struct ofconn *ofconn; | |
1587 | ||
1588 | HMAP_FOR_EACH (ofconn, hmap_node, &mgr->controllers) { | |
1589 | if (rconn_is_admitted(ofconn->rconn)) { | |
1590 | return true; | |
1591 | } | |
1592 | } | |
1593 | return false; | |
1594 | } | |
19a87e36 BP |
1595 | \f |
1596 | /* In-band configuration. */ | |
1597 | ||
1598 | static bool any_extras_changed(const struct connmgr *, | |
1599 | const struct sockaddr_in *extras, size_t n); | |
1600 | ||
1601 | /* Sets the 'n' TCP port addresses in 'extras' as ones to which 'mgr''s | |
1602 | * in-band control should guarantee access, in the same way that in-band | |
1603 | * control guarantees access to OpenFlow controllers. */ | |
1604 | void | |
1605 | connmgr_set_extra_in_band_remotes(struct connmgr *mgr, | |
1606 | const struct sockaddr_in *extras, size_t n) | |
1607 | { | |
1608 | if (!any_extras_changed(mgr, extras, n)) { | |
1609 | return; | |
1610 | } | |
1611 | ||
1612 | free(mgr->extra_in_band_remotes); | |
1613 | mgr->n_extra_remotes = n; | |
1614 | mgr->extra_in_band_remotes = xmemdup(extras, n * sizeof *extras); | |
1615 | ||
1616 | update_in_band_remotes(mgr); | |
1617 | } | |
1618 | ||
1619 | /* Sets the OpenFlow queue used by flows set up by in-band control on | |
1620 | * 'mgr' to 'queue_id'. If 'queue_id' is negative, then in-band control | |
1621 | * flows will use the default queue. */ | |
1622 | void | |
1623 | connmgr_set_in_band_queue(struct connmgr *mgr, int queue_id) | |
1624 | { | |
1625 | if (queue_id != mgr->in_band_queue) { | |
1626 | mgr->in_band_queue = queue_id; | |
1627 | update_in_band_remotes(mgr); | |
1628 | } | |
1629 | } | |
1630 | ||
1631 | static bool | |
1632 | any_extras_changed(const struct connmgr *mgr, | |
1633 | const struct sockaddr_in *extras, size_t n) | |
1634 | { | |
1635 | size_t i; | |
1636 | ||
1637 | if (n != mgr->n_extra_remotes) { | |
1638 | return true; | |
1639 | } | |
1640 | ||
1641 | for (i = 0; i < n; i++) { | |
1642 | const struct sockaddr_in *old = &mgr->extra_in_band_remotes[i]; | |
1643 | const struct sockaddr_in *new = &extras[i]; | |
1644 | ||
1645 | if (old->sin_addr.s_addr != new->sin_addr.s_addr || | |
1646 | old->sin_port != new->sin_port) { | |
1647 | return true; | |
1648 | } | |
1649 | } | |
1650 | ||
1651 | return false; | |
1652 | } | |
1653 | \f | |
1654 | /* In-band implementation. */ | |
1655 | ||
1656 | bool | |
f7f1ea29 | 1657 | connmgr_has_in_band(struct connmgr *mgr) |
19a87e36 | 1658 | { |
f7f1ea29 | 1659 | return mgr->in_band != NULL; |
19a87e36 BP |
1660 | } |
1661 | \f | |
1662 | /* Fail-open and in-band implementation. */ | |
1663 | ||
1664 | /* Called by 'ofproto' after all flows have been flushed, to allow fail-open | |
7ee20df1 BP |
1665 | * and standalone mode to re-create their flows. |
1666 | * | |
1667 | * In-band control has more sophisticated code that manages flows itself. */ | |
19a87e36 BP |
1668 | void |
1669 | connmgr_flushed(struct connmgr *mgr) | |
1670 | { | |
19a87e36 BP |
1671 | if (mgr->fail_open) { |
1672 | fail_open_flushed(mgr->fail_open); | |
1673 | } | |
08fd19f0 BP |
1674 | |
1675 | /* If there are no controllers and we're in standalone mode, set up a flow | |
1676 | * that matches every packet and directs them to OFPP_NORMAL (which goes to | |
1677 | * us). Otherwise, the switch is in secure mode and we won't pass any | |
1678 | * traffic until a controller has been defined and it tells us to do so. */ | |
1679 | if (!connmgr_has_controllers(mgr) | |
1680 | && mgr->fail_mode == OFPROTO_FAIL_STANDALONE) { | |
f25d0cf3 | 1681 | struct ofpbuf ofpacts; |
81a76618 | 1682 | struct match match; |
08fd19f0 | 1683 | |
f25d0cf3 BP |
1684 | ofpbuf_init(&ofpacts, OFPACT_OUTPUT_SIZE); |
1685 | ofpact_put_OUTPUT(&ofpacts)->port = OFPP_NORMAL; | |
1686 | ofpact_pad(&ofpacts); | |
1687 | ||
81a76618 BP |
1688 | match_init_catchall(&match); |
1689 | ofproto_add_flow(mgr->ofproto, &match, 0, ofpacts.data, ofpacts.size); | |
f25d0cf3 BP |
1690 | |
1691 | ofpbuf_uninit(&ofpacts); | |
08fd19f0 | 1692 | } |
19a87e36 BP |
1693 | } |
1694 | \f | |
1695 | /* Creates a new ofservice for 'target' in 'mgr'. Returns 0 if successful, | |
1696 | * otherwise a positive errno value. | |
1697 | * | |
1698 | * ofservice_reconfigure() must be called to fully configure the new | |
1699 | * ofservice. */ | |
1700 | static int | |
00401ef0 SH |
1701 | ofservice_create(struct connmgr *mgr, const char *target, |
1702 | uint32_t allowed_versions, uint8_t dscp) | |
19a87e36 BP |
1703 | { |
1704 | struct ofservice *ofservice; | |
1705 | struct pvconn *pvconn; | |
1706 | int error; | |
1707 | ||
82c8c53c | 1708 | error = pvconn_open(target, allowed_versions, dscp, &pvconn); |
19a87e36 BP |
1709 | if (error) { |
1710 | return error; | |
1711 | } | |
1712 | ||
1713 | ofservice = xzalloc(sizeof *ofservice); | |
1714 | hmap_insert(&mgr->services, &ofservice->node, hash_string(target, 0)); | |
1715 | ofservice->pvconn = pvconn; | |
90ef0206 | 1716 | ofservice->allowed_versions = allowed_versions; |
19a87e36 BP |
1717 | |
1718 | return 0; | |
1719 | } | |
1720 | ||
1721 | static void | |
1722 | ofservice_destroy(struct connmgr *mgr, struct ofservice *ofservice) | |
1723 | { | |
1724 | hmap_remove(&mgr->services, &ofservice->node); | |
1725 | pvconn_close(ofservice->pvconn); | |
1726 | free(ofservice); | |
1727 | } | |
1728 | ||
1729 | static void | |
1730 | ofservice_reconfigure(struct ofservice *ofservice, | |
1731 | const struct ofproto_controller *c) | |
1732 | { | |
1733 | ofservice->probe_interval = c->probe_interval; | |
1734 | ofservice->rate_limit = c->rate_limit; | |
1735 | ofservice->burst_limit = c->burst_limit; | |
9886b662 | 1736 | ofservice->enable_async_msgs = c->enable_async_msgs; |
f125905c | 1737 | ofservice->dscp = c->dscp; |
19a87e36 BP |
1738 | } |
1739 | ||
1740 | /* Finds and returns the ofservice within 'mgr' that has the given | |
1741 | * 'target', or a null pointer if none exists. */ | |
1742 | static struct ofservice * | |
1743 | ofservice_lookup(struct connmgr *mgr, const char *target) | |
1744 | { | |
1745 | struct ofservice *ofservice; | |
1746 | ||
1747 | HMAP_FOR_EACH_WITH_HASH (ofservice, node, hash_string(target, 0), | |
1748 | &mgr->services) { | |
1749 | if (!strcmp(pvconn_get_name(ofservice->pvconn), target)) { | |
1750 | return ofservice; | |
1751 | } | |
1752 | } | |
1753 | return NULL; | |
1754 | } | |
2b07c8b1 BP |
1755 | \f |
1756 | /* Flow monitors (NXST_FLOW_MONITOR). */ | |
1757 | ||
1758 | /* A counter incremented when something significant happens to an OpenFlow | |
1759 | * rule. | |
1760 | * | |
1761 | * - When a rule is added, its 'add_seqno' and 'modify_seqno' are set to | |
1762 | * the current value (which is then incremented). | |
1763 | * | |
1764 | * - When a rule is modified, its 'modify_seqno' is set to the current | |
1765 | * value (which is then incremented). | |
1766 | * | |
1767 | * Thus, by comparing an old value of monitor_seqno against a rule's | |
1768 | * 'add_seqno', one can tell whether the rule was added before or after the old | |
1769 | * value was read, and similarly for 'modify_seqno'. | |
1770 | * | |
1771 | * 32 bits should normally be sufficient (and would be nice, to save space in | |
1772 | * each rule) but then we'd have to have some special cases for wraparound. | |
1773 | * | |
1774 | * We initialize monitor_seqno to 1 to allow 0 to be used as an invalid | |
1775 | * value. */ | |
1776 | static uint64_t monitor_seqno = 1; | |
1777 | ||
1778 | COVERAGE_DEFINE(ofmonitor_pause); | |
1779 | COVERAGE_DEFINE(ofmonitor_resume); | |
1780 | ||
1781 | enum ofperr | |
1782 | ofmonitor_create(const struct ofputil_flow_monitor_request *request, | |
1783 | struct ofconn *ofconn, struct ofmonitor **monitorp) | |
1784 | { | |
1785 | struct ofmonitor *m; | |
1786 | ||
1787 | *monitorp = NULL; | |
1788 | ||
1789 | m = ofmonitor_lookup(ofconn, request->id); | |
1790 | if (m) { | |
1791 | return OFPERR_NXBRC_FM_DUPLICATE_ID; | |
1792 | } | |
1793 | ||
1794 | m = xmalloc(sizeof *m); | |
1795 | m->ofconn = ofconn; | |
1796 | hmap_insert(&ofconn->monitors, &m->ofconn_node, hash_int(request->id, 0)); | |
1797 | m->id = request->id; | |
1798 | m->flags = request->flags; | |
1799 | m->out_port = request->out_port; | |
1800 | m->table_id = request->table_id; | |
5cb7a798 | 1801 | minimatch_init(&m->match, &request->match); |
2b07c8b1 BP |
1802 | |
1803 | *monitorp = m; | |
1804 | return 0; | |
1805 | } | |
1806 | ||
1807 | struct ofmonitor * | |
1808 | ofmonitor_lookup(struct ofconn *ofconn, uint32_t id) | |
1809 | { | |
1810 | struct ofmonitor *m; | |
1811 | ||
1812 | HMAP_FOR_EACH_IN_BUCKET (m, ofconn_node, hash_int(id, 0), | |
1813 | &ofconn->monitors) { | |
1814 | if (m->id == id) { | |
1815 | return m; | |
1816 | } | |
1817 | } | |
1818 | return NULL; | |
1819 | } | |
1820 | ||
1821 | void | |
1822 | ofmonitor_destroy(struct ofmonitor *m) | |
1823 | { | |
1824 | if (m) { | |
5684eb74 | 1825 | minimatch_destroy(&m->match); |
2b07c8b1 BP |
1826 | hmap_remove(&m->ofconn->monitors, &m->ofconn_node); |
1827 | free(m); | |
1828 | } | |
1829 | } | |
1830 | ||
1831 | void | |
1832 | ofmonitor_report(struct connmgr *mgr, struct rule *rule, | |
1833 | enum nx_flow_update_event event, | |
1834 | enum ofp_flow_removed_reason reason, | |
1835 | const struct ofconn *abbrev_ofconn, ovs_be32 abbrev_xid) | |
1836 | { | |
1837 | enum nx_flow_monitor_flags update; | |
1838 | struct ofconn *ofconn; | |
1839 | ||
1840 | switch (event) { | |
1841 | case NXFME_ADDED: | |
1842 | update = NXFMF_ADD; | |
1843 | rule->add_seqno = rule->modify_seqno = monitor_seqno++; | |
1844 | break; | |
1845 | ||
1846 | case NXFME_DELETED: | |
1847 | update = NXFMF_DELETE; | |
1848 | break; | |
1849 | ||
1850 | case NXFME_MODIFIED: | |
1851 | update = NXFMF_MODIFY; | |
1852 | rule->modify_seqno = monitor_seqno++; | |
1853 | break; | |
1854 | ||
1855 | default: | |
1856 | case NXFME_ABBREV: | |
1857 | NOT_REACHED(); | |
1858 | } | |
1859 | ||
1860 | LIST_FOR_EACH (ofconn, node, &mgr->all_conns) { | |
1861 | enum nx_flow_monitor_flags flags = 0; | |
1862 | struct ofmonitor *m; | |
1863 | ||
1864 | if (ofconn->monitor_paused) { | |
1865 | /* Only send NXFME_DELETED notifications for flows that were added | |
1866 | * before we paused. */ | |
1867 | if (event != NXFME_DELETED | |
1868 | || rule->add_seqno > ofconn->monitor_paused) { | |
1869 | continue; | |
1870 | } | |
1871 | } | |
1872 | ||
1873 | HMAP_FOR_EACH (m, ofconn_node, &ofconn->monitors) { | |
1874 | if (m->flags & update | |
1875 | && (m->table_id == 0xff || m->table_id == rule->table_id) | |
1876 | && ofoperation_has_out_port(rule->pending, m->out_port) | |
1877 | && cls_rule_is_loose_match(&rule->cr, &m->match)) { | |
1878 | flags |= m->flags; | |
1879 | } | |
1880 | } | |
1881 | ||
1882 | if (flags) { | |
1883 | if (list_is_empty(&ofconn->updates)) { | |
1884 | ofputil_start_flow_update(&ofconn->updates); | |
1885 | ofconn->sent_abbrev_update = false; | |
1886 | } | |
1887 | ||
1888 | if (ofconn != abbrev_ofconn || ofconn->monitor_paused) { | |
1889 | struct ofputil_flow_update fu; | |
5cb7a798 | 1890 | struct match match; |
2b07c8b1 BP |
1891 | |
1892 | fu.event = event; | |
1893 | fu.reason = event == NXFME_DELETED ? reason : 0; | |
2b07c8b1 BP |
1894 | fu.table_id = rule->table_id; |
1895 | fu.cookie = rule->flow_cookie; | |
5cb7a798 BP |
1896 | minimatch_expand(&rule->cr.match, &match); |
1897 | fu.match = &match; | |
6b140a4e | 1898 | fu.priority = rule->cr.priority; |
a3779dbc EJ |
1899 | |
1900 | ovs_mutex_lock(&rule->timeout_mutex); | |
1901 | fu.idle_timeout = rule->idle_timeout; | |
1902 | fu.hard_timeout = rule->hard_timeout; | |
1903 | ovs_mutex_unlock(&rule->timeout_mutex); | |
1904 | ||
2b07c8b1 | 1905 | if (flags & NXFMF_ACTIONS) { |
6f00e29b BP |
1906 | fu.ofpacts = rule->actions->ofpacts; |
1907 | fu.ofpacts_len = rule->actions->ofpacts_len; | |
2b07c8b1 BP |
1908 | } else { |
1909 | fu.ofpacts = NULL; | |
1910 | fu.ofpacts_len = 0; | |
1911 | } | |
1912 | ofputil_append_flow_update(&fu, &ofconn->updates); | |
1913 | } else if (!ofconn->sent_abbrev_update) { | |
1914 | struct ofputil_flow_update fu; | |
1915 | ||
1916 | fu.event = NXFME_ABBREV; | |
1917 | fu.xid = abbrev_xid; | |
1918 | ofputil_append_flow_update(&fu, &ofconn->updates); | |
1919 | ||
1920 | ofconn->sent_abbrev_update = true; | |
1921 | } | |
1922 | } | |
1923 | } | |
1924 | } | |
1925 | ||
1926 | void | |
1927 | ofmonitor_flush(struct connmgr *mgr) | |
1928 | { | |
1929 | struct ofconn *ofconn; | |
1930 | ||
1931 | LIST_FOR_EACH (ofconn, node, &mgr->all_conns) { | |
1932 | struct ofpbuf *msg, *next; | |
1933 | ||
1934 | LIST_FOR_EACH_SAFE (msg, next, list_node, &ofconn->updates) { | |
1935 | list_remove(&msg->list_node); | |
1936 | ofconn_send(ofconn, msg, ofconn->monitor_counter); | |
1937 | if (!ofconn->monitor_paused | |
1938 | && ofconn->monitor_counter->n_bytes > 128 * 1024) { | |
1939 | struct ofpbuf *pause; | |
1940 | ||
1941 | COVERAGE_INC(ofmonitor_pause); | |
1942 | ofconn->monitor_paused = monitor_seqno++; | |
982697a4 BP |
1943 | pause = ofpraw_alloc_xid(OFPRAW_NXT_FLOW_MONITOR_PAUSED, |
1944 | OFP10_VERSION, htonl(0), 0); | |
2b07c8b1 BP |
1945 | ofconn_send(ofconn, pause, ofconn->monitor_counter); |
1946 | } | |
1947 | } | |
1948 | } | |
1949 | } | |
1950 | ||
1951 | static void | |
1952 | ofmonitor_resume(struct ofconn *ofconn) | |
1953 | { | |
a8e547c1 | 1954 | struct rule_collection rules; |
982697a4 | 1955 | struct ofpbuf *resumed; |
2b07c8b1 | 1956 | struct ofmonitor *m; |
2b07c8b1 BP |
1957 | struct list msgs; |
1958 | ||
a8e547c1 | 1959 | rule_collection_init(&rules); |
2b07c8b1 BP |
1960 | HMAP_FOR_EACH (m, ofconn_node, &ofconn->monitors) { |
1961 | ofmonitor_collect_resume_rules(m, ofconn->monitor_paused, &rules); | |
1962 | } | |
1963 | ||
1964 | list_init(&msgs); | |
1965 | ofmonitor_compose_refresh_updates(&rules, &msgs); | |
1966 | ||
982697a4 BP |
1967 | resumed = ofpraw_alloc_xid(OFPRAW_NXT_FLOW_MONITOR_RESUMED, OFP10_VERSION, |
1968 | htonl(0), 0); | |
1969 | list_push_back(&msgs, &resumed->list_node); | |
2b07c8b1 BP |
1970 | ofconn_send_replies(ofconn, &msgs); |
1971 | ||
1972 | ofconn->monitor_paused = 0; | |
1973 | } | |
1974 | ||
1975 | static void | |
1976 | ofmonitor_run(struct connmgr *mgr) | |
1977 | { | |
1978 | struct ofconn *ofconn; | |
1979 | ||
1980 | LIST_FOR_EACH (ofconn, node, &mgr->all_conns) { | |
1981 | if (ofconn->monitor_paused && !ofconn->monitor_counter->n_packets) { | |
1982 | COVERAGE_INC(ofmonitor_resume); | |
1983 | ofmonitor_resume(ofconn); | |
1984 | } | |
1985 | } | |
1986 | } | |
1987 | ||
1988 | static void | |
1989 | ofmonitor_wait(struct connmgr *mgr) | |
1990 | { | |
1991 | struct ofconn *ofconn; | |
1992 | ||
1993 | LIST_FOR_EACH (ofconn, node, &mgr->all_conns) { | |
1994 | if (ofconn->monitor_paused && !ofconn->monitor_counter->n_packets) { | |
1995 | poll_immediate_wake(); | |
1996 | } | |
1997 | } | |
1998 | } |