2 * Copyright (c) 2009, 2010, 2011, 2012, 2013, 2014 Nicira, Inc.
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:
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
25 #include "dynamic-string.h"
26 #include "fail-open.h"
29 #include "ofp-actions.h"
33 #include "ofproto-provider.h"
35 #include "poll-loop.h"
47 VLOG_DEFINE_THIS_MODULE(connmgr);
48 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
50 /* An OpenFlow connection.
56 * 'ofproto_mutex' must be held whenever an ofconn is created or destroyed or,
57 * more or less equivalently, whenever an ofconn is added to or removed from a
58 * connmgr. 'ofproto_mutex' doesn't protect the data inside the ofconn, except
59 * as specifically noted below. */
61 /* Configuration that persists from one connection to the next. */
63 struct list node; /* In struct connmgr's "all_conns" list. */
64 struct hmap_node hmap_node; /* In struct connmgr's "controllers" map. */
66 struct connmgr *connmgr; /* Connection's manager. */
67 struct rconn *rconn; /* OpenFlow connection. */
68 enum ofconn_type type; /* Type. */
69 enum ofproto_band band; /* In-band or out-of-band? */
70 bool enable_async_msgs; /* Initially enable async messages? */
72 /* State that should be cleared from one connection to the next. */
75 enum ofp12_controller_role role; /* Role. */
76 enum ofputil_protocol protocol; /* Current protocol variant. */
77 enum nx_packet_in_format packet_in_format; /* OFPT_PACKET_IN format. */
79 /* OFPT_PACKET_IN related data. */
80 struct rconn_packet_counter *packet_in_counter; /* # queued on 'rconn'. */
81 #define N_SCHEDULERS 2
82 struct pinsched *schedulers[N_SCHEDULERS];
83 struct pktbuf *pktbuf; /* OpenFlow packet buffers. */
84 int miss_send_len; /* Bytes to send of buffered packets. */
85 uint16_t controller_id; /* Connection controller ID. */
87 /* Number of OpenFlow messages queued on 'rconn' as replies to OpenFlow
88 * requests, and the maximum number before we stop reading OpenFlow
90 #define OFCONN_REPLY_MAX 100
91 struct rconn_packet_counter *reply_counter;
93 /* Asynchronous message configuration in each possible roles.
95 * A 1-bit enables sending an asynchronous message for one possible reason
96 * that the message might be generated, a 0-bit disables it. */
97 uint32_t master_async_config[OAM_N_TYPES]; /* master, other */
98 uint32_t slave_async_config[OAM_N_TYPES]; /* slave */
100 /* Flow table operation logging. */
101 int n_add, n_delete, n_modify; /* Number of unreported ops of each kind. */
102 long long int first_op, last_op; /* Range of times for unreported ops. */
103 long long int next_op_report; /* Time to report ops, or LLONG_MAX. */
104 long long int op_backoff; /* Earliest time to report ops again. */
106 /* Flow monitors (e.g. NXST_FLOW_MONITOR). */
108 /* Configuration. Contains "struct ofmonitor"s. */
109 struct hmap monitors OVS_GUARDED_BY(ofproto_mutex);
113 * When too many flow monitor notifications back up in the transmit buffer,
114 * we pause the transmission of further notifications. These members track
115 * the flow control state.
117 * When notifications are flowing, 'monitor_paused' is 0. When
118 * notifications are paused, 'monitor_paused' is the value of
119 * 'monitor_seqno' at the point we paused.
121 * 'monitor_counter' counts the OpenFlow messages and bytes currently in
122 * flight. This value growing too large triggers pausing. */
123 uint64_t monitor_paused OVS_GUARDED_BY(ofproto_mutex);
124 struct rconn_packet_counter *monitor_counter OVS_GUARDED_BY(ofproto_mutex);
126 /* State of monitors for a single ongoing flow_mod.
128 * 'updates' is a list of "struct ofpbuf"s that contain
129 * NXST_FLOW_MONITOR_REPLY messages representing the changes made by the
132 * When 'updates' is nonempty, 'sent_abbrev_update' is true if 'updates'
133 * contains an update event of type NXFME_ABBREV and false otherwise.. */
134 struct list updates OVS_GUARDED_BY(ofproto_mutex);
135 bool sent_abbrev_update OVS_GUARDED_BY(ofproto_mutex);
137 /* Active bundles. Contains "struct ofp_bundle"s. */
141 static struct ofconn *ofconn_create(struct connmgr *, struct rconn *,
142 enum ofconn_type, bool enable_async_msgs)
143 OVS_REQUIRES(ofproto_mutex);
144 static void ofconn_destroy(struct ofconn *) OVS_REQUIRES(ofproto_mutex);
145 static void ofconn_flush(struct ofconn *) OVS_REQUIRES(ofproto_mutex);
147 static void ofconn_reconfigure(struct ofconn *,
148 const struct ofproto_controller *);
150 static void ofconn_run(struct ofconn *,
151 void (*handle_openflow)(struct ofconn *,
152 const struct ofpbuf *ofp_msg));
153 static void ofconn_wait(struct ofconn *);
155 static void ofconn_log_flow_mods(struct ofconn *);
157 static const char *ofconn_get_target(const struct ofconn *);
158 static char *ofconn_make_name(const struct connmgr *, const char *target);
160 static void ofconn_set_rate_limit(struct ofconn *, int rate, int burst);
162 static void ofconn_send(const struct ofconn *, struct ofpbuf *,
163 struct rconn_packet_counter *);
165 static void do_send_packet_ins(struct ofconn *, struct list *txq);
167 /* A listener for incoming OpenFlow "service" connections. */
169 struct hmap_node node; /* In struct connmgr's "services" hmap. */
170 struct pvconn *pvconn; /* OpenFlow connection listener. */
172 /* These are not used by ofservice directly. They are settings for
173 * accepted "struct ofconn"s from the pvconn. */
174 int probe_interval; /* Max idle time before probing, in seconds. */
175 int rate_limit; /* Max packet-in rate in packets per second. */
176 int burst_limit; /* Limit on accumulating packet credits. */
177 bool enable_async_msgs; /* Initially enable async messages? */
178 uint8_t dscp; /* DSCP Value for controller connection */
179 uint32_t allowed_versions; /* OpenFlow protocol versions that may
180 * be negotiated for a session. */
183 static void ofservice_reconfigure(struct ofservice *,
184 const struct ofproto_controller *);
185 static int ofservice_create(struct connmgr *mgr, const char *target,
186 uint32_t allowed_versions, uint8_t dscp);
187 static void ofservice_destroy(struct connmgr *, struct ofservice *);
188 static struct ofservice *ofservice_lookup(struct connmgr *,
191 /* Connection manager for an OpenFlow switch. */
193 struct ofproto *ofproto;
195 char *local_port_name;
197 /* OpenFlow connections. */
198 struct hmap controllers; /* All OFCONN_PRIMARY controllers. */
199 struct list all_conns; /* All controllers. */
200 uint64_t master_election_id; /* monotonically increasing sequence number
201 * for master election */
202 bool master_election_id_defined;
204 /* OpenFlow listeners. */
205 struct hmap services; /* Contains "struct ofservice"s. */
206 struct pvconn **snoops;
210 struct fail_open *fail_open;
211 enum ofproto_fail_mode fail_mode;
213 /* In-band control. */
214 struct in_band *in_band;
215 struct sockaddr_in *extra_in_band_remotes;
216 size_t n_extra_remotes;
220 static void update_in_band_remotes(struct connmgr *);
221 static void add_snooper(struct connmgr *, struct vconn *);
222 static void ofmonitor_run(struct connmgr *);
223 static void ofmonitor_wait(struct connmgr *);
225 /* Creates and returns a new connection manager owned by 'ofproto'. 'name' is
226 * a name for the ofproto suitable for using in log messages.
227 * 'local_port_name' is the name of the local port (OFPP_LOCAL) within
230 connmgr_create(struct ofproto *ofproto,
231 const char *name, const char *local_port_name)
235 mgr = xmalloc(sizeof *mgr);
236 mgr->ofproto = ofproto;
237 mgr->name = xstrdup(name);
238 mgr->local_port_name = xstrdup(local_port_name);
240 hmap_init(&mgr->controllers);
241 list_init(&mgr->all_conns);
242 mgr->master_election_id = 0;
243 mgr->master_election_id_defined = false;
245 hmap_init(&mgr->services);
249 mgr->fail_open = NULL;
250 mgr->fail_mode = OFPROTO_FAIL_SECURE;
253 mgr->extra_in_band_remotes = NULL;
254 mgr->n_extra_remotes = 0;
255 mgr->in_band_queue = -1;
260 /* Frees 'mgr' and all of its resources. */
262 connmgr_destroy(struct connmgr *mgr)
264 struct ofservice *ofservice, *next_ofservice;
265 struct ofconn *ofconn, *next_ofconn;
272 ovs_mutex_lock(&ofproto_mutex);
273 LIST_FOR_EACH_SAFE (ofconn, next_ofconn, node, &mgr->all_conns) {
274 ofconn_destroy(ofconn);
276 ovs_mutex_unlock(&ofproto_mutex);
278 hmap_destroy(&mgr->controllers);
280 HMAP_FOR_EACH_SAFE (ofservice, next_ofservice, node, &mgr->services) {
281 ofservice_destroy(mgr, ofservice);
283 hmap_destroy(&mgr->services);
285 for (i = 0; i < mgr->n_snoops; i++) {
286 pvconn_close(mgr->snoops[i]);
290 fail_open_destroy(mgr->fail_open);
291 mgr->fail_open = NULL;
293 in_band_destroy(mgr->in_band);
295 free(mgr->extra_in_band_remotes);
297 free(mgr->local_port_name);
302 /* Does all of the periodic maintenance required by 'mgr'. Calls
303 * 'handle_openflow' for each message received on an OpenFlow connection,
304 * passing along the OpenFlow connection itself and the message that was sent.
305 * 'handle_openflow' must not modify or free the message. */
307 connmgr_run(struct connmgr *mgr,
308 void (*handle_openflow)(struct ofconn *,
309 const struct ofpbuf *ofp_msg))
310 OVS_EXCLUDED(ofproto_mutex)
312 struct ofconn *ofconn, *next_ofconn;
313 struct ofservice *ofservice;
317 if (!in_band_run(mgr->in_band)) {
318 in_band_destroy(mgr->in_band);
323 LIST_FOR_EACH_SAFE (ofconn, next_ofconn, node, &mgr->all_conns) {
324 ofconn_run(ofconn, handle_openflow);
328 /* Fail-open maintenance. Do this after processing the ofconns since
329 * fail-open checks the status of the controller rconn. */
330 if (mgr->fail_open) {
331 fail_open_run(mgr->fail_open);
334 HMAP_FOR_EACH (ofservice, node, &mgr->services) {
338 retval = pvconn_accept(ofservice->pvconn, &vconn);
343 /* Passing default value for creation of the rconn */
344 rconn = rconn_create(ofservice->probe_interval, 0, ofservice->dscp,
345 vconn_get_allowed_versions(vconn));
346 name = ofconn_make_name(mgr, vconn_get_name(vconn));
347 rconn_connect_unreliably(rconn, vconn, name);
350 ovs_mutex_lock(&ofproto_mutex);
351 ofconn = ofconn_create(mgr, rconn, OFCONN_SERVICE,
352 ofservice->enable_async_msgs);
353 ovs_mutex_unlock(&ofproto_mutex);
355 ofconn_set_rate_limit(ofconn, ofservice->rate_limit,
356 ofservice->burst_limit);
357 } else if (retval != EAGAIN) {
358 VLOG_WARN_RL(&rl, "accept failed (%s)", ovs_strerror(retval));
362 for (i = 0; i < mgr->n_snoops; i++) {
366 retval = pvconn_accept(mgr->snoops[i], &vconn);
368 add_snooper(mgr, vconn);
369 } else if (retval != EAGAIN) {
370 VLOG_WARN_RL(&rl, "accept failed (%s)", ovs_strerror(retval));
375 /* Causes the poll loop to wake up when connmgr_run() needs to run. */
377 connmgr_wait(struct connmgr *mgr)
379 struct ofservice *ofservice;
380 struct ofconn *ofconn;
383 LIST_FOR_EACH (ofconn, node, &mgr->all_conns) {
388 in_band_wait(mgr->in_band);
390 if (mgr->fail_open) {
391 fail_open_wait(mgr->fail_open);
393 HMAP_FOR_EACH (ofservice, node, &mgr->services) {
394 pvconn_wait(ofservice->pvconn);
396 for (i = 0; i < mgr->n_snoops; i++) {
397 pvconn_wait(mgr->snoops[i]);
401 /* Adds some memory usage statistics for 'mgr' into 'usage', for use with
402 * memory_report(). */
404 connmgr_get_memory_usage(const struct connmgr *mgr, struct simap *usage)
406 const struct ofconn *ofconn;
407 unsigned int packets = 0;
408 unsigned int ofconns = 0;
410 LIST_FOR_EACH (ofconn, node, &mgr->all_conns) {
415 packets += rconn_count_txqlen(ofconn->rconn);
416 for (i = 0; i < N_SCHEDULERS; i++) {
417 struct pinsched_stats stats;
419 pinsched_get_stats(ofconn->schedulers[i], &stats);
420 packets += stats.n_queued;;
422 packets += pktbuf_count_packets(ofconn->pktbuf);
424 simap_increase(usage, "ofconns", ofconns);
425 simap_increase(usage, "packets", packets);
428 /* Returns the ofproto that owns 'ofconn''s connmgr. */
430 ofconn_get_ofproto(const struct ofconn *ofconn)
432 return ofconn->connmgr->ofproto;
435 /* OpenFlow configuration. */
437 static void add_controller(struct connmgr *, const char *target, uint8_t dscp,
438 uint32_t allowed_versions)
439 OVS_REQUIRES(ofproto_mutex);
440 static struct ofconn *find_controller_by_target(struct connmgr *,
442 static void update_fail_open(struct connmgr *) OVS_EXCLUDED(ofproto_mutex);
443 static int set_pvconns(struct pvconn ***pvconnsp, size_t *n_pvconnsp,
444 const struct sset *);
446 /* Returns true if 'mgr' has any configured primary controllers.
448 * Service controllers do not count, but configured primary controllers do
449 * count whether or not they are currently connected. */
451 connmgr_has_controllers(const struct connmgr *mgr)
453 return !hmap_is_empty(&mgr->controllers);
456 /* Initializes 'info' and populates it with information about each configured
457 * primary controller. The keys in 'info' are the controllers' targets; the
458 * data values are corresponding "struct ofproto_controller_info".
460 * The caller owns 'info' and everything in it and should free it when it is no
463 connmgr_get_controller_info(struct connmgr *mgr, struct shash *info)
465 const struct ofconn *ofconn;
467 HMAP_FOR_EACH (ofconn, hmap_node, &mgr->controllers) {
468 const struct rconn *rconn = ofconn->rconn;
469 const char *target = rconn_get_target(rconn);
471 if (!shash_find(info, target)) {
472 struct ofproto_controller_info *cinfo = xmalloc(sizeof *cinfo);
473 time_t now = time_now();
474 time_t last_connection = rconn_get_last_connection(rconn);
475 time_t last_disconnect = rconn_get_last_disconnect(rconn);
476 int last_error = rconn_get_last_error(rconn);
479 shash_add(info, target, cinfo);
481 cinfo->is_connected = rconn_is_connected(rconn);
482 cinfo->role = ofconn->role;
484 smap_init(&cinfo->pairs);
486 smap_add(&cinfo->pairs, "last_error",
487 ovs_retval_to_string(last_error));
490 smap_add(&cinfo->pairs, "state", rconn_get_state(rconn));
492 if (last_connection != TIME_MIN) {
493 smap_add_format(&cinfo->pairs, "sec_since_connect",
494 "%ld", (long int) (now - last_connection));
497 if (last_disconnect != TIME_MIN) {
498 smap_add_format(&cinfo->pairs, "sec_since_disconnect",
499 "%ld", (long int) (now - last_disconnect));
502 for (i = 0; i < N_SCHEDULERS; i++) {
503 if (ofconn->schedulers[i]) {
504 const char *name = i ? "miss" : "action";
505 struct pinsched_stats stats;
507 pinsched_get_stats(ofconn->schedulers[i], &stats);
508 smap_add_nocopy(&cinfo->pairs,
509 xasprintf("packet-in-%s-backlog", name),
510 xasprintf("%u", stats.n_queued));
511 smap_add_nocopy(&cinfo->pairs,
512 xasprintf("packet-in-%s-bypassed", name),
513 xasprintf("%llu", stats.n_normal));
514 smap_add_nocopy(&cinfo->pairs,
515 xasprintf("packet-in-%s-queued", name),
516 xasprintf("%llu", stats.n_limited));
517 smap_add_nocopy(&cinfo->pairs,
518 xasprintf("packet-in-%s-dropped", name),
519 xasprintf("%llu", stats.n_queue_dropped));
527 connmgr_free_controller_info(struct shash *info)
529 struct shash_node *node;
531 SHASH_FOR_EACH (node, info) {
532 struct ofproto_controller_info *cinfo = node->data;
533 smap_destroy(&cinfo->pairs);
539 /* Changes 'mgr''s set of controllers to the 'n_controllers' controllers in
542 connmgr_set_controllers(struct connmgr *mgr,
543 const struct ofproto_controller *controllers,
544 size_t n_controllers, uint32_t allowed_versions)
545 OVS_EXCLUDED(ofproto_mutex)
547 bool had_controllers = connmgr_has_controllers(mgr);
548 struct shash new_controllers;
549 struct ofconn *ofconn, *next_ofconn;
550 struct ofservice *ofservice, *next_ofservice;
553 /* Required to add and remove ofconns. This could probably be narrowed to
554 * cover a smaller amount of code, if that yielded some benefit. */
555 ovs_mutex_lock(&ofproto_mutex);
557 /* Create newly configured controllers and services.
558 * Create a name to ofproto_controller mapping in 'new_controllers'. */
559 shash_init(&new_controllers);
560 for (i = 0; i < n_controllers; i++) {
561 const struct ofproto_controller *c = &controllers[i];
563 if (!vconn_verify_name(c->target)) {
565 ofconn = find_controller_by_target(mgr, c->target);
567 VLOG_INFO("%s: added primary controller \"%s\"",
568 mgr->name, c->target);
570 } else if (rconn_get_allowed_versions(ofconn->rconn) !=
572 VLOG_INFO("%s: re-added primary controller \"%s\"",
573 mgr->name, c->target);
575 ofconn_destroy(ofconn);
578 add_controller(mgr, c->target, c->dscp, allowed_versions);
580 } else if (!pvconn_verify_name(c->target)) {
582 ofservice = ofservice_lookup(mgr, c->target);
584 VLOG_INFO("%s: added service controller \"%s\"",
585 mgr->name, c->target);
587 } else if (ofservice->allowed_versions != allowed_versions) {
588 VLOG_INFO("%s: re-added service controller \"%s\"",
589 mgr->name, c->target);
590 ofservice_destroy(mgr, ofservice);
594 ofservice_create(mgr, c->target, allowed_versions, c->dscp);
597 VLOG_WARN_RL(&rl, "%s: unsupported controller \"%s\"",
598 mgr->name, c->target);
602 shash_add_once(&new_controllers, c->target, &controllers[i]);
605 /* Delete controllers that are no longer configured.
606 * Update configuration of all now-existing controllers. */
607 HMAP_FOR_EACH_SAFE (ofconn, next_ofconn, hmap_node, &mgr->controllers) {
608 const char *target = ofconn_get_target(ofconn);
609 struct ofproto_controller *c;
611 c = shash_find_data(&new_controllers, target);
613 VLOG_INFO("%s: removed primary controller \"%s\"",
615 ofconn_destroy(ofconn);
617 ofconn_reconfigure(ofconn, c);
621 /* Delete services that are no longer configured.
622 * Update configuration of all now-existing services. */
623 HMAP_FOR_EACH_SAFE (ofservice, next_ofservice, node, &mgr->services) {
624 const char *target = pvconn_get_name(ofservice->pvconn);
625 struct ofproto_controller *c;
627 c = shash_find_data(&new_controllers, target);
629 VLOG_INFO("%s: removed service controller \"%s\"",
631 ofservice_destroy(mgr, ofservice);
633 ofservice_reconfigure(ofservice, c);
637 shash_destroy(&new_controllers);
639 ovs_mutex_unlock(&ofproto_mutex);
641 update_in_band_remotes(mgr);
642 update_fail_open(mgr);
643 if (had_controllers != connmgr_has_controllers(mgr)) {
644 ofproto_flush_flows(mgr->ofproto);
648 /* Drops the connections between 'mgr' and all of its primary and secondary
649 * controllers, forcing them to reconnect. */
651 connmgr_reconnect(const struct connmgr *mgr)
653 struct ofconn *ofconn;
655 LIST_FOR_EACH (ofconn, node, &mgr->all_conns) {
656 rconn_reconnect(ofconn->rconn);
660 /* Sets the "snoops" for 'mgr' to the pvconn targets listed in 'snoops'.
662 * A "snoop" is a pvconn to which every OpenFlow message to or from the most
663 * important controller on 'mgr' is mirrored. */
665 connmgr_set_snoops(struct connmgr *mgr, const struct sset *snoops)
667 return set_pvconns(&mgr->snoops, &mgr->n_snoops, snoops);
670 /* Adds each of the snoops currently configured on 'mgr' to 'snoops'. */
672 connmgr_get_snoops(const struct connmgr *mgr, struct sset *snoops)
676 for (i = 0; i < mgr->n_snoops; i++) {
677 sset_add(snoops, pvconn_get_name(mgr->snoops[i]));
681 /* Returns true if 'mgr' has at least one snoop, false if it has none. */
683 connmgr_has_snoops(const struct connmgr *mgr)
685 return mgr->n_snoops > 0;
688 /* Creates a new controller for 'target' in 'mgr'. update_controller() needs
689 * to be called later to finish the new ofconn's configuration. */
691 add_controller(struct connmgr *mgr, const char *target, uint8_t dscp,
692 uint32_t allowed_versions)
693 OVS_REQUIRES(ofproto_mutex)
695 char *name = ofconn_make_name(mgr, target);
696 struct ofconn *ofconn;
698 ofconn = ofconn_create(mgr, rconn_create(5, 8, dscp, allowed_versions),
699 OFCONN_PRIMARY, true);
700 ofconn->pktbuf = pktbuf_create();
701 rconn_connect(ofconn->rconn, target, name);
702 hmap_insert(&mgr->controllers, &ofconn->hmap_node, hash_string(target, 0));
707 static struct ofconn *
708 find_controller_by_target(struct connmgr *mgr, const char *target)
710 struct ofconn *ofconn;
712 HMAP_FOR_EACH_WITH_HASH (ofconn, hmap_node,
713 hash_string(target, 0), &mgr->controllers) {
714 if (!strcmp(ofconn_get_target(ofconn), target)) {
722 update_in_band_remotes(struct connmgr *mgr)
724 struct sockaddr_in *addrs;
725 size_t max_addrs, n_addrs;
726 struct ofconn *ofconn;
729 /* Allocate enough memory for as many remotes as we could possibly have. */
730 max_addrs = mgr->n_extra_remotes + hmap_count(&mgr->controllers);
731 addrs = xmalloc(max_addrs * sizeof *addrs);
734 /* Add all the remotes. */
735 HMAP_FOR_EACH (ofconn, hmap_node, &mgr->controllers) {
736 const char *target = rconn_get_target(ofconn->rconn);
737 struct sockaddr_storage ss;
739 if (ofconn->band == OFPROTO_IN_BAND
740 && stream_parse_target_with_default_port(target, OFP_OLD_PORT, &ss)
741 && ss.ss_family == AF_INET) {
742 addrs[n_addrs++] = *(struct sockaddr_in *) &ss;
745 for (i = 0; i < mgr->n_extra_remotes; i++) {
746 addrs[n_addrs++] = mgr->extra_in_band_remotes[i];
749 /* Create or update or destroy in-band. */
752 in_band_create(mgr->ofproto, mgr->local_port_name, &mgr->in_band);
754 in_band_set_queue(mgr->in_band, mgr->in_band_queue);
756 /* in_band_run() needs a chance to delete any existing in-band flows.
757 * We will destroy mgr->in_band after it's done with that. */
760 in_band_set_remotes(mgr->in_band, addrs, n_addrs);
768 update_fail_open(struct connmgr *mgr)
769 OVS_EXCLUDED(ofproto_mutex)
771 if (connmgr_has_controllers(mgr)
772 && mgr->fail_mode == OFPROTO_FAIL_STANDALONE) {
773 if (!mgr->fail_open) {
774 mgr->fail_open = fail_open_create(mgr->ofproto, mgr);
777 fail_open_destroy(mgr->fail_open);
778 mgr->fail_open = NULL;
783 set_pvconns(struct pvconn ***pvconnsp, size_t *n_pvconnsp,
784 const struct sset *sset)
786 struct pvconn **pvconns = *pvconnsp;
787 size_t n_pvconns = *n_pvconnsp;
792 for (i = 0; i < n_pvconns; i++) {
793 pvconn_close(pvconns[i]);
797 pvconns = xmalloc(sset_count(sset) * sizeof *pvconns);
799 SSET_FOR_EACH (name, sset) {
800 struct pvconn *pvconn;
802 error = pvconn_open(name, 0, 0, &pvconn);
804 pvconns[n_pvconns++] = pvconn;
806 VLOG_ERR("failed to listen on %s: %s", name, ovs_strerror(error));
814 *n_pvconnsp = n_pvconns;
819 /* Returns a "preference level" for snooping 'ofconn'. A higher return value
820 * means that 'ofconn' is more interesting for monitoring than a lower return
823 snoop_preference(const struct ofconn *ofconn)
825 switch (ofconn->role) {
826 case OFPCR12_ROLE_MASTER:
828 case OFPCR12_ROLE_EQUAL:
830 case OFPCR12_ROLE_SLAVE:
832 case OFPCR12_ROLE_NOCHANGE:
834 /* Shouldn't happen. */
839 /* One of 'mgr''s "snoop" pvconns has accepted a new connection on 'vconn'.
840 * Connects this vconn to a controller. */
842 add_snooper(struct connmgr *mgr, struct vconn *vconn)
844 struct ofconn *ofconn, *best;
846 /* Pick a controller for monitoring. */
848 LIST_FOR_EACH (ofconn, node, &mgr->all_conns) {
849 if (ofconn->type == OFCONN_PRIMARY
850 && (!best || snoop_preference(ofconn) > snoop_preference(best))) {
856 rconn_add_monitor(best->rconn, vconn);
858 VLOG_INFO_RL(&rl, "no controller connection to snoop");
863 /* Public ofconn functions. */
865 /* Returns the connection type, either OFCONN_PRIMARY or OFCONN_SERVICE. */
867 ofconn_get_type(const struct ofconn *ofconn)
872 /* If a master election id is defined, stores it into '*idp' and returns
873 * true. Otherwise, stores UINT64_MAX into '*idp' and returns false. */
875 ofconn_get_master_election_id(const struct ofconn *ofconn, uint64_t *idp)
877 *idp = (ofconn->connmgr->master_election_id_defined
878 ? ofconn->connmgr->master_election_id
880 return ofconn->connmgr->master_election_id_defined;
883 /* Sets the master election id.
885 * Returns true if successful, false if the id is stale
888 ofconn_set_master_election_id(struct ofconn *ofconn, uint64_t id)
890 if (ofconn->connmgr->master_election_id_defined
892 /* Unsigned difference interpreted as a two's complement signed
894 (int64_t)(id - ofconn->connmgr->master_election_id) < 0) {
897 ofconn->connmgr->master_election_id = id;
898 ofconn->connmgr->master_election_id_defined = true;
903 /* Returns the role configured for 'ofconn'.
905 * The default role, if no other role has been set, is OFPCR12_ROLE_EQUAL. */
906 enum ofp12_controller_role
907 ofconn_get_role(const struct ofconn *ofconn)
913 ofconn_send_role_status(struct ofconn *ofconn, uint32_t role, uint8_t reason)
915 struct ofputil_role_status status;
918 status.reason = reason;
920 ofconn_get_master_election_id(ofconn, &status.generation_id);
922 buf = ofputil_encode_role_status(&status, ofconn_get_protocol(ofconn));
924 ofconn_send(ofconn, buf, NULL);
928 /* Changes 'ofconn''s role to 'role'. If 'role' is OFPCR12_ROLE_MASTER then
929 * any existing master is demoted to a slave. */
931 ofconn_set_role(struct ofconn *ofconn, enum ofp12_controller_role role)
933 if (role != ofconn->role && role == OFPCR12_ROLE_MASTER) {
934 struct ofconn *other;
936 LIST_FOR_EACH (other, node, &ofconn->connmgr->all_conns) {
937 if (other->role == OFPCR12_ROLE_MASTER) {
938 other->role = OFPCR12_ROLE_SLAVE;
939 ofconn_send_role_status(other, OFPCR12_ROLE_SLAVE, OFPCRR_MASTER_REQUEST);
947 ofconn_set_invalid_ttl_to_controller(struct ofconn *ofconn, bool enable)
949 uint32_t bit = 1u << OFPR_INVALID_TTL;
951 ofconn->master_async_config[OAM_PACKET_IN] |= bit;
953 ofconn->master_async_config[OAM_PACKET_IN] &= ~bit;
958 ofconn_get_invalid_ttl_to_controller(struct ofconn *ofconn)
960 uint32_t bit = 1u << OFPR_INVALID_TTL;
961 return (ofconn->master_async_config[OAM_PACKET_IN] & bit) != 0;
964 /* Returns the currently configured protocol for 'ofconn', one of OFPUTIL_P_*.
966 * Returns OFPUTIL_P_NONE, which is not a valid protocol, if 'ofconn' hasn't
967 * completed version negotiation. This can't happen if at least one OpenFlow
968 * message, other than OFPT_HELLO, has been received on the connection (such as
969 * in ofproto.c's message handling code), since version negotiation is a
970 * prerequisite for starting to receive messages. This means that
971 * OFPUTIL_P_NONE is a special case that most callers need not worry about. */
972 enum ofputil_protocol
973 ofconn_get_protocol(const struct ofconn *ofconn)
975 if (ofconn->protocol == OFPUTIL_P_NONE &&
976 rconn_is_connected(ofconn->rconn)) {
977 int version = rconn_get_version(ofconn->rconn);
979 ofconn_set_protocol(CONST_CAST(struct ofconn *, ofconn),
980 ofputil_protocol_from_ofp_version(version));
984 return ofconn->protocol;
987 /* Sets the protocol for 'ofconn' to 'protocol' (one of OFPUTIL_P_*).
989 * (This doesn't actually send anything to accomplish this. Presumably the
990 * caller already did that.) */
992 ofconn_set_protocol(struct ofconn *ofconn, enum ofputil_protocol protocol)
994 ofconn->protocol = protocol;
997 /* Returns the currently configured packet in format for 'ofconn', one of
1000 * The default, if no other format has been set, is NXPIF_OPENFLOW10. */
1001 enum nx_packet_in_format
1002 ofconn_get_packet_in_format(struct ofconn *ofconn)
1004 return ofconn->packet_in_format;
1007 /* Sets the packet in format for 'ofconn' to 'packet_in_format' (one of
1010 ofconn_set_packet_in_format(struct ofconn *ofconn,
1011 enum nx_packet_in_format packet_in_format)
1013 ofconn->packet_in_format = packet_in_format;
1016 /* Sets the controller connection ID for 'ofconn' to 'controller_id'.
1018 * The connection controller ID is used for OFPP_CONTROLLER and
1019 * NXAST_CONTROLLER actions. See "struct nx_action_controller" for details. */
1021 ofconn_set_controller_id(struct ofconn *ofconn, uint16_t controller_id)
1023 ofconn->controller_id = controller_id;
1026 /* Returns the default miss send length for 'ofconn'. */
1028 ofconn_get_miss_send_len(const struct ofconn *ofconn)
1030 return ofconn->miss_send_len;
1033 /* Sets the default miss send length for 'ofconn' to 'miss_send_len'. */
1035 ofconn_set_miss_send_len(struct ofconn *ofconn, int miss_send_len)
1037 ofconn->miss_send_len = miss_send_len;
1041 ofconn_set_async_config(struct ofconn *ofconn,
1042 const uint32_t master_masks[OAM_N_TYPES],
1043 const uint32_t slave_masks[OAM_N_TYPES])
1045 size_t size = sizeof ofconn->master_async_config;
1046 memcpy(ofconn->master_async_config, master_masks, size);
1047 memcpy(ofconn->slave_async_config, slave_masks, size);
1051 ofconn_get_async_config(struct ofconn *ofconn,
1052 uint32_t *master_masks, uint32_t *slave_masks)
1054 size_t size = sizeof ofconn->master_async_config;
1055 memcpy(master_masks, ofconn->master_async_config, size);
1056 memcpy(slave_masks, ofconn->slave_async_config, size);
1059 /* Sends 'msg' on 'ofconn', accounting it as a reply. (If there is a
1060 * sufficient number of OpenFlow replies in-flight on a single ofconn, then the
1061 * connmgr will stop accepting new OpenFlow requests on that ofconn until the
1062 * controller has accepted some of the replies.) */
1064 ofconn_send_reply(const struct ofconn *ofconn, struct ofpbuf *msg)
1066 ofconn_send(ofconn, msg, ofconn->reply_counter);
1069 /* Sends each of the messages in list 'replies' on 'ofconn' in order,
1070 * accounting them as replies. */
1072 ofconn_send_replies(const struct ofconn *ofconn, struct list *replies)
1074 struct ofpbuf *reply, *next;
1076 LIST_FOR_EACH_SAFE (reply, next, list_node, replies) {
1077 list_remove(&reply->list_node);
1078 ofconn_send_reply(ofconn, reply);
1082 /* Sends 'error' on 'ofconn', as a reply to 'request'. Only at most the
1083 * first 64 bytes of 'request' are used. */
1085 ofconn_send_error(const struct ofconn *ofconn,
1086 const struct ofp_header *request, enum ofperr error)
1088 static struct vlog_rate_limit err_rl = VLOG_RATE_LIMIT_INIT(10, 10);
1089 struct ofpbuf *reply;
1091 reply = ofperr_encode_reply(error, request);
1092 if (!VLOG_DROP_INFO(&err_rl)) {
1093 const char *type_name;
1097 request_len = ntohs(request->length);
1098 type_name = (!ofpraw_decode_partial(&raw, request,
1099 MIN(64, request_len))
1100 ? ofpraw_get_name(raw)
1103 VLOG_INFO("%s: sending %s error reply to %s message",
1104 rconn_get_name(ofconn->rconn), ofperr_to_string(error),
1107 ofconn_send_reply(ofconn, reply);
1110 /* Same as pktbuf_retrieve(), using the pktbuf owned by 'ofconn'. */
1112 ofconn_pktbuf_retrieve(struct ofconn *ofconn, uint32_t id,
1113 struct ofpbuf **bufferp, ofp_port_t *in_port)
1115 return pktbuf_retrieve(ofconn->pktbuf, id, bufferp, in_port);
1118 /* Reports that a flow_mod operation of the type specified by 'command' was
1119 * successfully executed by 'ofconn', so that the connmgr can log it. */
1121 ofconn_report_flow_mod(struct ofconn *ofconn,
1122 enum ofp_flow_mod_command command)
1132 case OFPFC_MODIFY_STRICT:
1137 case OFPFC_DELETE_STRICT:
1143 if (ofconn->next_op_report == LLONG_MAX) {
1144 ofconn->first_op = now;
1145 ofconn->next_op_report = MAX(now + 10 * 1000, ofconn->op_backoff);
1146 ofconn->op_backoff = ofconn->next_op_report + 60 * 1000;
1148 ofconn->last_op = now;
1152 ofconn_get_bundles(struct ofconn *ofconn)
1154 return &ofconn->bundles;
1158 /* Private ofconn functions. */
1161 ofconn_get_target(const struct ofconn *ofconn)
1163 return rconn_get_target(ofconn->rconn);
1166 static struct ofconn *
1167 ofconn_create(struct connmgr *mgr, struct rconn *rconn, enum ofconn_type type,
1168 bool enable_async_msgs)
1170 struct ofconn *ofconn;
1172 ofconn = xzalloc(sizeof *ofconn);
1173 ofconn->connmgr = mgr;
1174 list_push_back(&mgr->all_conns, &ofconn->node);
1175 ofconn->rconn = rconn;
1176 ofconn->type = type;
1177 ofconn->enable_async_msgs = enable_async_msgs;
1179 hmap_init(&ofconn->monitors);
1180 list_init(&ofconn->updates);
1182 hmap_init(&ofconn->bundles);
1184 ofconn_flush(ofconn);
1189 /* Clears all of the state in 'ofconn' that should not persist from one
1190 * connection to the next. */
1192 ofconn_flush(struct ofconn *ofconn)
1193 OVS_REQUIRES(ofproto_mutex)
1195 struct ofmonitor *monitor, *next_monitor;
1198 ofconn_log_flow_mods(ofconn);
1200 ofconn->role = OFPCR12_ROLE_EQUAL;
1201 ofconn_set_protocol(ofconn, OFPUTIL_P_NONE);
1202 ofconn->packet_in_format = NXPIF_OPENFLOW10;
1204 rconn_packet_counter_destroy(ofconn->packet_in_counter);
1205 ofconn->packet_in_counter = rconn_packet_counter_create();
1206 for (i = 0; i < N_SCHEDULERS; i++) {
1207 if (ofconn->schedulers[i]) {
1210 pinsched_get_limits(ofconn->schedulers[i], &rate, &burst);
1211 pinsched_destroy(ofconn->schedulers[i]);
1212 ofconn->schedulers[i] = pinsched_create(rate, burst);
1215 if (ofconn->pktbuf) {
1216 pktbuf_destroy(ofconn->pktbuf);
1217 ofconn->pktbuf = pktbuf_create();
1219 ofconn->miss_send_len = (ofconn->type == OFCONN_PRIMARY
1220 ? OFP_DEFAULT_MISS_SEND_LEN
1222 ofconn->controller_id = 0;
1224 rconn_packet_counter_destroy(ofconn->reply_counter);
1225 ofconn->reply_counter = rconn_packet_counter_create();
1227 if (ofconn->enable_async_msgs) {
1228 uint32_t *master = ofconn->master_async_config;
1229 uint32_t *slave = ofconn->slave_async_config;
1231 /* "master" and "other" roles get all asynchronous messages by default,
1232 * except that the controller needs to enable nonstandard "packet-in"
1233 * reasons itself. */
1234 master[OAM_PACKET_IN] = (1u << OFPR_NO_MATCH) | (1u << OFPR_ACTION);
1235 master[OAM_PORT_STATUS] = ((1u << OFPPR_ADD)
1236 | (1u << OFPPR_DELETE)
1237 | (1u << OFPPR_MODIFY));
1238 master[OAM_FLOW_REMOVED] = ((1u << OFPRR_IDLE_TIMEOUT)
1239 | (1u << OFPRR_HARD_TIMEOUT)
1240 | (1u << OFPRR_DELETE));
1242 /* "slave" role gets port status updates by default. */
1243 slave[OAM_PACKET_IN] = 0;
1244 slave[OAM_PORT_STATUS] = ((1u << OFPPR_ADD)
1245 | (1u << OFPPR_DELETE)
1246 | (1u << OFPPR_MODIFY));
1247 slave[OAM_FLOW_REMOVED] = 0;
1249 memset(ofconn->master_async_config, 0,
1250 sizeof ofconn->master_async_config);
1251 memset(ofconn->slave_async_config, 0,
1252 sizeof ofconn->slave_async_config);
1255 ofconn->n_add = ofconn->n_delete = ofconn->n_modify = 0;
1256 ofconn->first_op = ofconn->last_op = LLONG_MIN;
1257 ofconn->next_op_report = LLONG_MAX;
1258 ofconn->op_backoff = LLONG_MIN;
1260 HMAP_FOR_EACH_SAFE (monitor, next_monitor, ofconn_node,
1261 &ofconn->monitors) {
1262 ofmonitor_destroy(monitor);
1264 rconn_packet_counter_destroy(ofconn->monitor_counter);
1265 ofconn->monitor_counter = rconn_packet_counter_create();
1266 ofpbuf_list_delete(&ofconn->updates); /* ...but it should be empty. */
1270 ofconn_destroy(struct ofconn *ofconn)
1271 OVS_REQUIRES(ofproto_mutex)
1273 ofconn_flush(ofconn);
1275 if (ofconn->type == OFCONN_PRIMARY) {
1276 hmap_remove(&ofconn->connmgr->controllers, &ofconn->hmap_node);
1279 ofp_bundle_remove_all(ofconn);
1281 hmap_destroy(&ofconn->monitors);
1282 list_remove(&ofconn->node);
1283 rconn_destroy(ofconn->rconn);
1284 rconn_packet_counter_destroy(ofconn->packet_in_counter);
1285 rconn_packet_counter_destroy(ofconn->reply_counter);
1286 pktbuf_destroy(ofconn->pktbuf);
1287 rconn_packet_counter_destroy(ofconn->monitor_counter);
1291 /* Reconfigures 'ofconn' to match 'c'. 'ofconn' and 'c' must have the same
1294 ofconn_reconfigure(struct ofconn *ofconn, const struct ofproto_controller *c)
1298 ofconn->band = c->band;
1299 ofconn->enable_async_msgs = c->enable_async_msgs;
1301 rconn_set_max_backoff(ofconn->rconn, c->max_backoff);
1303 probe_interval = c->probe_interval ? MAX(c->probe_interval, 5) : 0;
1304 rconn_set_probe_interval(ofconn->rconn, probe_interval);
1306 ofconn_set_rate_limit(ofconn, c->rate_limit, c->burst_limit);
1308 /* If dscp value changed reconnect. */
1309 if (c->dscp != rconn_get_dscp(ofconn->rconn)) {
1310 rconn_set_dscp(ofconn->rconn, c->dscp);
1311 rconn_reconnect(ofconn->rconn);
1315 /* Returns true if it makes sense for 'ofconn' to receive and process OpenFlow
1318 ofconn_may_recv(const struct ofconn *ofconn)
1320 int count = rconn_packet_counter_n_packets(ofconn->reply_counter);
1321 return count < OFCONN_REPLY_MAX;
1325 ofconn_run(struct ofconn *ofconn,
1326 void (*handle_openflow)(struct ofconn *,
1327 const struct ofpbuf *ofp_msg))
1329 struct connmgr *mgr = ofconn->connmgr;
1332 for (i = 0; i < N_SCHEDULERS; i++) {
1335 pinsched_run(ofconn->schedulers[i], &txq);
1336 do_send_packet_ins(ofconn, &txq);
1339 rconn_run(ofconn->rconn);
1341 /* Limit the number of iterations to avoid starving other tasks. */
1342 for (i = 0; i < 50 && ofconn_may_recv(ofconn); i++) {
1343 struct ofpbuf *of_msg = rconn_recv(ofconn->rconn);
1348 if (mgr->fail_open) {
1349 fail_open_maybe_recover(mgr->fail_open);
1352 handle_openflow(ofconn, of_msg);
1353 ofpbuf_delete(of_msg);
1356 if (time_msec() >= ofconn->next_op_report) {
1357 ofconn_log_flow_mods(ofconn);
1360 ovs_mutex_lock(&ofproto_mutex);
1361 if (!rconn_is_alive(ofconn->rconn)) {
1362 ofconn_destroy(ofconn);
1363 } else if (!rconn_is_connected(ofconn->rconn)) {
1364 ofconn_flush(ofconn);
1366 ovs_mutex_unlock(&ofproto_mutex);
1370 ofconn_wait(struct ofconn *ofconn)
1374 for (i = 0; i < N_SCHEDULERS; i++) {
1375 pinsched_wait(ofconn->schedulers[i]);
1377 rconn_run_wait(ofconn->rconn);
1378 if (ofconn_may_recv(ofconn)) {
1379 rconn_recv_wait(ofconn->rconn);
1381 if (ofconn->next_op_report != LLONG_MAX) {
1382 poll_timer_wait_until(ofconn->next_op_report);
1387 ofconn_log_flow_mods(struct ofconn *ofconn)
1389 int n_flow_mods = ofconn->n_add + ofconn->n_delete + ofconn->n_modify;
1391 long long int ago = (time_msec() - ofconn->first_op) / 1000;
1392 long long int interval = (ofconn->last_op - ofconn->first_op) / 1000;
1396 ds_put_format(&s, "%d flow_mods ", n_flow_mods);
1397 if (interval == ago) {
1398 ds_put_format(&s, "in the last %lld s", ago);
1399 } else if (interval) {
1400 ds_put_format(&s, "in the %lld s starting %lld s ago",
1403 ds_put_format(&s, "%lld s ago", ago);
1406 ds_put_cstr(&s, " (");
1407 if (ofconn->n_add) {
1408 ds_put_format(&s, "%d adds, ", ofconn->n_add);
1410 if (ofconn->n_delete) {
1411 ds_put_format(&s, "%d deletes, ", ofconn->n_delete);
1413 if (ofconn->n_modify) {
1414 ds_put_format(&s, "%d modifications, ", ofconn->n_modify);
1417 ds_put_char(&s, ')');
1419 VLOG_INFO("%s: %s", rconn_get_name(ofconn->rconn), ds_cstr(&s));
1422 ofconn->n_add = ofconn->n_delete = ofconn->n_modify = 0;
1424 ofconn->next_op_report = LLONG_MAX;
1427 /* Returns true if 'ofconn' should receive asynchronous messages of the given
1428 * OAM_* 'type' and 'reason', which should be a OFPR_* value for OAM_PACKET_IN,
1429 * a OFPPR_* value for OAM_PORT_STATUS, or an OFPRR_* value for
1430 * OAM_FLOW_REMOVED. Returns false if the message should not be sent on
1433 ofconn_receives_async_msg(const struct ofconn *ofconn,
1434 enum ofconn_async_msg_type type,
1435 unsigned int reason)
1437 const uint32_t *async_config;
1439 ovs_assert(reason < 32);
1440 ovs_assert((unsigned int) type < OAM_N_TYPES);
1442 if (ofconn_get_protocol(ofconn) == OFPUTIL_P_NONE
1443 || !rconn_is_connected(ofconn->rconn)) {
1447 /* Keep the following code in sync with the documentation in the
1448 * "Asynchronous Messages" section in DESIGN. */
1450 if (ofconn->type == OFCONN_SERVICE && !ofconn->miss_send_len) {
1451 /* Service connections don't get asynchronous messages unless they have
1452 * explicitly asked for them by setting a nonzero miss send length. */
1456 async_config = (ofconn->role == OFPCR12_ROLE_SLAVE
1457 ? ofconn->slave_async_config
1458 : ofconn->master_async_config);
1459 if (!(async_config[type] & (1u << reason))) {
1466 /* The default "table-miss" behaviour for OpenFlow1.3+ is to drop the
1467 * packet rather than to send the packet to the controller.
1469 * This function returns false to indicate the packet should be dropped if
1470 * the controller action was the result of the default table-miss behaviour
1471 * and the controller is using OpenFlow1.3+.
1473 * Otherwise true is returned to indicate the packet should be forwarded to
1476 ofconn_wants_packet_in_on_miss(struct ofconn *ofconn,
1477 const struct ofproto_packet_in *pin)
1479 if (pin->miss_type == OFPROTO_PACKET_IN_MISS_WITHOUT_FLOW) {
1480 enum ofputil_protocol protocol = ofconn_get_protocol(ofconn);
1482 if (protocol != OFPUTIL_P_NONE
1483 && ofputil_protocol_to_ofp_version(protocol) >= OFP13_VERSION) {
1484 enum ofproto_table_config config;
1486 config = ofproto_table_get_config(ofconn->connmgr->ofproto,
1488 if (config == OFPROTO_TABLE_MISS_DEFAULT) {
1496 /* The default "table-miss" behaviour for OpenFlow1.3+ is to drop the
1497 * packet rather than to send the packet to the controller.
1499 * This function returns true to indicate that a packet_in message
1500 * for a "table-miss" should be sent to at least one controller.
1501 * That is there is at least one controller with controller_id 0
1502 * which connected using an OpenFlow version earlier than OpenFlow1.3.
1506 * This logic assumes that "table-miss" packet_in messages
1507 * are always sent to controller_id 0. */
1509 connmgr_wants_packet_in_on_miss(struct connmgr *mgr) OVS_EXCLUDED(ofproto_mutex)
1511 struct ofconn *ofconn;
1513 ovs_mutex_lock(&ofproto_mutex);
1514 LIST_FOR_EACH (ofconn, node, &mgr->all_conns) {
1515 enum ofputil_protocol protocol = ofconn_get_protocol(ofconn);
1517 if (ofconn->controller_id == 0 &&
1518 (protocol == OFPUTIL_P_NONE ||
1519 ofputil_protocol_to_ofp_version(protocol) < OFP13_VERSION)) {
1520 ovs_mutex_unlock(&ofproto_mutex);
1524 ovs_mutex_unlock(&ofproto_mutex);
1529 /* Returns a human-readable name for an OpenFlow connection between 'mgr' and
1530 * 'target', suitable for use in log messages for identifying the connection.
1532 * The name is dynamically allocated. The caller should free it (with free())
1533 * when it is no longer needed. */
1535 ofconn_make_name(const struct connmgr *mgr, const char *target)
1537 return xasprintf("%s<->%s", mgr->name, target);
1541 ofconn_set_rate_limit(struct ofconn *ofconn, int rate, int burst)
1545 for (i = 0; i < N_SCHEDULERS; i++) {
1546 struct pinsched **s = &ofconn->schedulers[i];
1550 *s = pinsched_create(rate, burst);
1552 pinsched_set_limits(*s, rate, burst);
1555 pinsched_destroy(*s);
1562 ofconn_send(const struct ofconn *ofconn, struct ofpbuf *msg,
1563 struct rconn_packet_counter *counter)
1565 ofpmsg_update_length(msg);
1566 rconn_send(ofconn->rconn, msg, counter);
1569 /* Sending asynchronous messages. */
1571 static void schedule_packet_in(struct ofconn *, struct ofproto_packet_in,
1572 enum ofp_packet_in_reason wire_reason);
1574 /* Sends an OFPT_PORT_STATUS message with 'opp' and 'reason' to appropriate
1575 * controllers managed by 'mgr'. For messages caused by a controller
1576 * OFPT_PORT_MOD, specify 'source' as the controller connection that sent the
1577 * request; otherwise, specify 'source' as NULL. */
1579 connmgr_send_port_status(struct connmgr *mgr, struct ofconn *source,
1580 const struct ofputil_phy_port *pp, uint8_t reason)
1582 /* XXX Should limit the number of queued port status change messages. */
1583 struct ofputil_port_status ps;
1584 struct ofconn *ofconn;
1588 LIST_FOR_EACH (ofconn, node, &mgr->all_conns) {
1589 if (ofconn_receives_async_msg(ofconn, OAM_PORT_STATUS, reason)) {
1592 /* Before 1.5, OpenFlow specified that OFPT_PORT_MOD should not
1593 * generate OFPT_PORT_STATUS messages. That requirement was a
1594 * relic of how OpenFlow originally supported a single controller,
1595 * so that one could expect the controller to already know the
1596 * changes it had made.
1598 * EXT-338 changes OpenFlow 1.5 OFPT_PORT_MOD to send
1599 * OFPT_PORT_STATUS messages to every controller. This is
1600 * obviously more useful in the multi-controller case. We could
1601 * always implement it that way in OVS, but that would risk
1602 * confusing controllers that are intended for single-controller
1603 * use only. (Imagine a controller that generates an OFPT_PORT_MOD
1604 * in response to any OFPT_PORT_STATUS!)
1606 * So this compromises: for OpenFlow 1.4 and earlier, it generates
1607 * OFPT_PORT_STATUS for OFPT_PORT_MOD, but not back to the
1608 * originating controller. In a single-controller environment, in
1609 * particular, this means that it will never generate
1610 * OFPT_PORT_STATUS for OFPT_PORT_MOD at all. */
1611 if (ofconn == source
1612 && rconn_get_version(ofconn->rconn) < OFP15_VERSION) {
1616 msg = ofputil_encode_port_status(&ps, ofconn_get_protocol(ofconn));
1617 ofconn_send(ofconn, msg, NULL);
1622 /* Sends an OFPT_FLOW_REMOVED or NXT_FLOW_REMOVED message based on 'fr' to
1623 * appropriate controllers managed by 'mgr'. */
1625 connmgr_send_flow_removed(struct connmgr *mgr,
1626 const struct ofputil_flow_removed *fr)
1628 struct ofconn *ofconn;
1630 LIST_FOR_EACH (ofconn, node, &mgr->all_conns) {
1631 if (ofconn_receives_async_msg(ofconn, OAM_FLOW_REMOVED, fr->reason)) {
1634 /* Account flow expirations as replies to OpenFlow requests. That
1635 * works because preventing OpenFlow requests from being processed
1636 * also prevents new flows from being added (and expiring). (It
1637 * also prevents processing OpenFlow requests that would not add
1638 * new flows, so it is imperfect.) */
1639 msg = ofputil_encode_flow_removed(fr, ofconn_get_protocol(ofconn));
1640 ofconn_send_reply(ofconn, msg);
1645 /* Normally a send-to-controller action uses reason OFPR_ACTION. However, in
1646 * OpenFlow 1.3 and later, packet_ins generated by a send-to-controller action
1647 * in a "table-miss" flow (one with priority 0 and completely wildcarded) are
1648 * sent as OFPR_NO_MATCH. This function returns the reason that should
1649 * actually be sent on 'ofconn' for 'pin'. */
1650 static enum ofp_packet_in_reason
1651 wire_reason(struct ofconn *ofconn, const struct ofproto_packet_in *pin)
1653 if (pin->miss_type == OFPROTO_PACKET_IN_MISS_FLOW
1654 && pin->up.reason == OFPR_ACTION) {
1655 enum ofputil_protocol protocol = ofconn_get_protocol(ofconn);
1657 if (protocol != OFPUTIL_P_NONE
1658 && ofputil_protocol_to_ofp_version(protocol) >= OFP13_VERSION) {
1659 return OFPR_NO_MATCH;
1662 return pin->up.reason;
1665 /* Given 'pin', sends an OFPT_PACKET_IN message to each OpenFlow controller as
1666 * necessary according to their individual configurations.
1668 * The caller doesn't need to fill in pin->buffer_id or pin->total_len. */
1670 connmgr_send_packet_in(struct connmgr *mgr,
1671 const struct ofproto_packet_in *pin)
1673 struct ofconn *ofconn;
1675 LIST_FOR_EACH (ofconn, node, &mgr->all_conns) {
1676 enum ofp_packet_in_reason reason = wire_reason(ofconn, pin);
1678 if (ofconn_wants_packet_in_on_miss(ofconn, pin)
1679 && ofconn_receives_async_msg(ofconn, OAM_PACKET_IN, pin->up.reason)
1680 && ofconn->controller_id == pin->controller_id) {
1681 schedule_packet_in(ofconn, *pin, reason);
1687 do_send_packet_ins(struct ofconn *ofconn, struct list *txq)
1689 struct ofpbuf *pin, *next_pin;
1691 LIST_FOR_EACH_SAFE (pin, next_pin, list_node, txq) {
1692 list_remove(&pin->list_node);
1694 if (rconn_send_with_limit(ofconn->rconn, pin,
1695 ofconn->packet_in_counter, 100) == EAGAIN) {
1696 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 5);
1698 VLOG_INFO_RL(&rl, "%s: dropping packet-in due to queue overflow",
1699 rconn_get_name(ofconn->rconn));
1704 /* Takes 'pin', composes an OpenFlow packet-in message from it, and passes it
1705 * to 'ofconn''s packet scheduler for sending. */
1707 schedule_packet_in(struct ofconn *ofconn, struct ofproto_packet_in pin,
1708 enum ofp_packet_in_reason wire_reason)
1710 struct connmgr *mgr = ofconn->connmgr;
1711 uint16_t controller_max_len;
1714 pin.up.total_len = pin.up.packet_len;
1716 pin.up.reason = wire_reason;
1717 if (pin.up.reason == OFPR_ACTION) {
1718 controller_max_len = pin.send_len; /* max_len */
1720 controller_max_len = ofconn->miss_send_len;
1723 /* Get OpenFlow buffer_id.
1724 * For OpenFlow 1.2+, OFPCML_NO_BUFFER (== UINT16_MAX) specifies
1725 * unbuffered. This behaviour doesn't violate prior versions, too. */
1726 if (controller_max_len == UINT16_MAX) {
1727 pin.up.buffer_id = UINT32_MAX;
1728 } else if (mgr->fail_open && fail_open_is_active(mgr->fail_open)) {
1729 pin.up.buffer_id = pktbuf_get_null();
1730 } else if (!ofconn->pktbuf) {
1731 pin.up.buffer_id = UINT32_MAX;
1733 pin.up.buffer_id = pktbuf_save(ofconn->pktbuf,
1734 pin.up.packet, pin.up.packet_len,
1735 pin.up.fmd.in_port);
1738 /* Figure out how much of the packet to send.
1739 * If not buffered, send the entire packet. Otherwise, depending on
1740 * the reason of packet-in, send what requested by the controller. */
1741 if (pin.up.buffer_id != UINT32_MAX
1742 && controller_max_len < pin.up.packet_len) {
1743 pin.up.packet_len = controller_max_len;
1746 /* Make OFPT_PACKET_IN and hand over to packet scheduler. */
1747 pinsched_send(ofconn->schedulers[pin.up.reason == OFPR_NO_MATCH ? 0 : 1],
1749 ofputil_encode_packet_in(&pin.up,
1750 ofconn_get_protocol(ofconn),
1751 ofconn->packet_in_format),
1753 do_send_packet_ins(ofconn, &txq);
1756 /* Fail-open settings. */
1758 /* Returns the failure handling mode (OFPROTO_FAIL_SECURE or
1759 * OFPROTO_FAIL_STANDALONE) for 'mgr'. */
1760 enum ofproto_fail_mode
1761 connmgr_get_fail_mode(const struct connmgr *mgr)
1763 return mgr->fail_mode;
1766 /* Sets the failure handling mode for 'mgr' to 'fail_mode' (either
1767 * OFPROTO_FAIL_SECURE or OFPROTO_FAIL_STANDALONE). */
1769 connmgr_set_fail_mode(struct connmgr *mgr, enum ofproto_fail_mode fail_mode)
1771 if (mgr->fail_mode != fail_mode) {
1772 mgr->fail_mode = fail_mode;
1773 update_fail_open(mgr);
1774 if (!connmgr_has_controllers(mgr)) {
1775 ofproto_flush_flows(mgr->ofproto);
1780 /* Fail-open implementation. */
1782 /* Returns the longest probe interval among the primary controllers configured
1783 * on 'mgr'. Returns 0 if there are no primary controllers. */
1785 connmgr_get_max_probe_interval(const struct connmgr *mgr)
1787 const struct ofconn *ofconn;
1788 int max_probe_interval;
1790 max_probe_interval = 0;
1791 HMAP_FOR_EACH (ofconn, hmap_node, &mgr->controllers) {
1792 int probe_interval = rconn_get_probe_interval(ofconn->rconn);
1793 max_probe_interval = MAX(max_probe_interval, probe_interval);
1795 return max_probe_interval;
1798 /* Returns the number of seconds for which all of 'mgr's primary controllers
1799 * have been disconnected. Returns 0 if 'mgr' has no primary controllers. */
1801 connmgr_failure_duration(const struct connmgr *mgr)
1803 const struct ofconn *ofconn;
1804 int min_failure_duration;
1806 if (!connmgr_has_controllers(mgr)) {
1810 min_failure_duration = INT_MAX;
1811 HMAP_FOR_EACH (ofconn, hmap_node, &mgr->controllers) {
1812 int failure_duration = rconn_failure_duration(ofconn->rconn);
1813 min_failure_duration = MIN(min_failure_duration, failure_duration);
1815 return min_failure_duration;
1818 /* Returns true if at least one primary controller is connected (regardless of
1819 * whether those controllers are believed to have authenticated and accepted
1820 * this switch), false if none of them are connected. */
1822 connmgr_is_any_controller_connected(const struct connmgr *mgr)
1824 const struct ofconn *ofconn;
1826 HMAP_FOR_EACH (ofconn, hmap_node, &mgr->controllers) {
1827 if (rconn_is_connected(ofconn->rconn)) {
1834 /* Returns true if at least one primary controller is believed to have
1835 * authenticated and accepted this switch, false otherwise. */
1837 connmgr_is_any_controller_admitted(const struct connmgr *mgr)
1839 const struct ofconn *ofconn;
1841 HMAP_FOR_EACH (ofconn, hmap_node, &mgr->controllers) {
1842 if (rconn_is_admitted(ofconn->rconn)) {
1849 /* In-band configuration. */
1851 static bool any_extras_changed(const struct connmgr *,
1852 const struct sockaddr_in *extras, size_t n);
1854 /* Sets the 'n' TCP port addresses in 'extras' as ones to which 'mgr''s
1855 * in-band control should guarantee access, in the same way that in-band
1856 * control guarantees access to OpenFlow controllers. */
1858 connmgr_set_extra_in_band_remotes(struct connmgr *mgr,
1859 const struct sockaddr_in *extras, size_t n)
1861 if (!any_extras_changed(mgr, extras, n)) {
1865 free(mgr->extra_in_band_remotes);
1866 mgr->n_extra_remotes = n;
1867 mgr->extra_in_band_remotes = xmemdup(extras, n * sizeof *extras);
1869 update_in_band_remotes(mgr);
1872 /* Sets the OpenFlow queue used by flows set up by in-band control on
1873 * 'mgr' to 'queue_id'. If 'queue_id' is negative, then in-band control
1874 * flows will use the default queue. */
1876 connmgr_set_in_band_queue(struct connmgr *mgr, int queue_id)
1878 if (queue_id != mgr->in_band_queue) {
1879 mgr->in_band_queue = queue_id;
1880 update_in_band_remotes(mgr);
1885 any_extras_changed(const struct connmgr *mgr,
1886 const struct sockaddr_in *extras, size_t n)
1890 if (n != mgr->n_extra_remotes) {
1894 for (i = 0; i < n; i++) {
1895 const struct sockaddr_in *old = &mgr->extra_in_band_remotes[i];
1896 const struct sockaddr_in *new = &extras[i];
1898 if (old->sin_addr.s_addr != new->sin_addr.s_addr ||
1899 old->sin_port != new->sin_port) {
1907 /* In-band implementation. */
1910 connmgr_has_in_band(struct connmgr *mgr)
1912 return mgr->in_band != NULL;
1915 /* Fail-open and in-band implementation. */
1917 /* Called by 'ofproto' after all flows have been flushed, to allow fail-open
1918 * and standalone mode to re-create their flows.
1920 * In-band control has more sophisticated code that manages flows itself. */
1922 connmgr_flushed(struct connmgr *mgr)
1923 OVS_EXCLUDED(ofproto_mutex)
1925 if (mgr->fail_open) {
1926 fail_open_flushed(mgr->fail_open);
1929 /* If there are no controllers and we're in standalone mode, set up a flow
1930 * that matches every packet and directs them to OFPP_NORMAL (which goes to
1931 * us). Otherwise, the switch is in secure mode and we won't pass any
1932 * traffic until a controller has been defined and it tells us to do so. */
1933 if (!connmgr_has_controllers(mgr)
1934 && mgr->fail_mode == OFPROTO_FAIL_STANDALONE) {
1935 struct ofpbuf ofpacts;
1938 ofpbuf_init(&ofpacts, OFPACT_OUTPUT_SIZE);
1939 ofpact_put_OUTPUT(&ofpacts)->port = OFPP_NORMAL;
1940 ofpact_pad(&ofpacts);
1942 match_init_catchall(&match);
1943 ofproto_add_flow(mgr->ofproto, &match, 0, ofpbuf_data(&ofpacts),
1944 ofpbuf_size(&ofpacts));
1946 ofpbuf_uninit(&ofpacts);
1950 /* Creates a new ofservice for 'target' in 'mgr'. Returns 0 if successful,
1951 * otherwise a positive errno value.
1953 * ofservice_reconfigure() must be called to fully configure the new
1956 ofservice_create(struct connmgr *mgr, const char *target,
1957 uint32_t allowed_versions, uint8_t dscp)
1959 struct ofservice *ofservice;
1960 struct pvconn *pvconn;
1963 error = pvconn_open(target, allowed_versions, dscp, &pvconn);
1968 ofservice = xzalloc(sizeof *ofservice);
1969 hmap_insert(&mgr->services, &ofservice->node, hash_string(target, 0));
1970 ofservice->pvconn = pvconn;
1971 ofservice->allowed_versions = allowed_versions;
1977 ofservice_destroy(struct connmgr *mgr, struct ofservice *ofservice)
1979 hmap_remove(&mgr->services, &ofservice->node);
1980 pvconn_close(ofservice->pvconn);
1985 ofservice_reconfigure(struct ofservice *ofservice,
1986 const struct ofproto_controller *c)
1988 ofservice->probe_interval = c->probe_interval;
1989 ofservice->rate_limit = c->rate_limit;
1990 ofservice->burst_limit = c->burst_limit;
1991 ofservice->enable_async_msgs = c->enable_async_msgs;
1992 ofservice->dscp = c->dscp;
1995 /* Finds and returns the ofservice within 'mgr' that has the given
1996 * 'target', or a null pointer if none exists. */
1997 static struct ofservice *
1998 ofservice_lookup(struct connmgr *mgr, const char *target)
2000 struct ofservice *ofservice;
2002 HMAP_FOR_EACH_WITH_HASH (ofservice, node, hash_string(target, 0),
2004 if (!strcmp(pvconn_get_name(ofservice->pvconn), target)) {
2011 /* Flow monitors (NXST_FLOW_MONITOR). */
2013 /* A counter incremented when something significant happens to an OpenFlow
2016 * - When a rule is added, its 'add_seqno' and 'modify_seqno' are set to
2017 * the current value (which is then incremented).
2019 * - When a rule is modified, its 'modify_seqno' is set to the current
2020 * value (which is then incremented).
2022 * Thus, by comparing an old value of monitor_seqno against a rule's
2023 * 'add_seqno', one can tell whether the rule was added before or after the old
2024 * value was read, and similarly for 'modify_seqno'.
2026 * 32 bits should normally be sufficient (and would be nice, to save space in
2027 * each rule) but then we'd have to have some special cases for wraparound.
2029 * We initialize monitor_seqno to 1 to allow 0 to be used as an invalid
2031 static uint64_t monitor_seqno = 1;
2033 COVERAGE_DEFINE(ofmonitor_pause);
2034 COVERAGE_DEFINE(ofmonitor_resume);
2037 ofmonitor_create(const struct ofputil_flow_monitor_request *request,
2038 struct ofconn *ofconn, struct ofmonitor **monitorp)
2039 OVS_REQUIRES(ofproto_mutex)
2041 struct ofmonitor *m;
2045 m = ofmonitor_lookup(ofconn, request->id);
2047 return OFPERR_OFPMOFC_MONITOR_EXISTS;
2050 m = xmalloc(sizeof *m);
2052 hmap_insert(&ofconn->monitors, &m->ofconn_node, hash_int(request->id, 0));
2053 m->id = request->id;
2054 m->flags = request->flags;
2055 m->out_port = request->out_port;
2056 m->table_id = request->table_id;
2057 minimatch_init(&m->match, &request->match);
2064 ofmonitor_lookup(struct ofconn *ofconn, uint32_t id)
2065 OVS_REQUIRES(ofproto_mutex)
2067 struct ofmonitor *m;
2069 HMAP_FOR_EACH_IN_BUCKET (m, ofconn_node, hash_int(id, 0),
2070 &ofconn->monitors) {
2079 ofmonitor_destroy(struct ofmonitor *m)
2080 OVS_REQUIRES(ofproto_mutex)
2083 minimatch_destroy(&m->match);
2084 hmap_remove(&m->ofconn->monitors, &m->ofconn_node);
2090 ofmonitor_report(struct connmgr *mgr, struct rule *rule,
2091 enum nx_flow_update_event event,
2092 enum ofp_flow_removed_reason reason,
2093 const struct ofconn *abbrev_ofconn, ovs_be32 abbrev_xid,
2094 const struct rule_actions *old_actions)
2095 OVS_REQUIRES(ofproto_mutex)
2097 enum nx_flow_monitor_flags update;
2098 struct ofconn *ofconn;
2100 if (rule_is_hidden(rule)) {
2107 rule->add_seqno = rule->modify_seqno = monitor_seqno++;
2111 update = NXFMF_DELETE;
2114 case NXFME_MODIFIED:
2115 update = NXFMF_MODIFY;
2116 rule->modify_seqno = monitor_seqno++;
2124 LIST_FOR_EACH (ofconn, node, &mgr->all_conns) {
2125 enum nx_flow_monitor_flags flags = 0;
2126 struct ofmonitor *m;
2128 if (ofconn->monitor_paused) {
2129 /* Only send NXFME_DELETED notifications for flows that were added
2130 * before we paused. */
2131 if (event != NXFME_DELETED
2132 || rule->add_seqno > ofconn->monitor_paused) {
2137 HMAP_FOR_EACH (m, ofconn_node, &ofconn->monitors) {
2138 if (m->flags & update
2139 && (m->table_id == 0xff || m->table_id == rule->table_id)
2140 && (ofproto_rule_has_out_port(rule, m->out_port)
2142 && ofpacts_output_to_port(old_actions->ofpacts,
2143 old_actions->ofpacts_len,
2145 && cls_rule_is_loose_match(&rule->cr, &m->match)) {
2151 if (list_is_empty(&ofconn->updates)) {
2152 ofputil_start_flow_update(&ofconn->updates);
2153 ofconn->sent_abbrev_update = false;
2156 if (flags & NXFMF_OWN || ofconn != abbrev_ofconn
2157 || ofconn->monitor_paused) {
2158 struct ofputil_flow_update fu;
2162 fu.reason = event == NXFME_DELETED ? reason : 0;
2163 fu.table_id = rule->table_id;
2164 fu.cookie = rule->flow_cookie;
2165 minimatch_expand(&rule->cr.match, &match);
2167 fu.priority = rule->cr.priority;
2169 ovs_mutex_lock(&rule->mutex);
2170 fu.idle_timeout = rule->idle_timeout;
2171 fu.hard_timeout = rule->hard_timeout;
2172 ovs_mutex_unlock(&rule->mutex);
2174 if (flags & NXFMF_ACTIONS) {
2175 const struct rule_actions *actions = rule_get_actions(rule);
2176 fu.ofpacts = actions->ofpacts;
2177 fu.ofpacts_len = actions->ofpacts_len;
2182 ofputil_append_flow_update(&fu, &ofconn->updates);
2183 } else if (!ofconn->sent_abbrev_update) {
2184 struct ofputil_flow_update fu;
2186 fu.event = NXFME_ABBREV;
2187 fu.xid = abbrev_xid;
2188 ofputil_append_flow_update(&fu, &ofconn->updates);
2190 ofconn->sent_abbrev_update = true;
2197 ofmonitor_flush(struct connmgr *mgr)
2198 OVS_REQUIRES(ofproto_mutex)
2200 struct ofconn *ofconn;
2202 LIST_FOR_EACH (ofconn, node, &mgr->all_conns) {
2203 struct ofpbuf *msg, *next;
2205 LIST_FOR_EACH_SAFE (msg, next, list_node, &ofconn->updates) {
2206 unsigned int n_bytes;
2208 list_remove(&msg->list_node);
2209 ofconn_send(ofconn, msg, ofconn->monitor_counter);
2210 n_bytes = rconn_packet_counter_n_bytes(ofconn->monitor_counter);
2211 if (!ofconn->monitor_paused && n_bytes > 128 * 1024) {
2212 struct ofpbuf *pause;
2214 COVERAGE_INC(ofmonitor_pause);
2215 ofconn->monitor_paused = monitor_seqno++;
2216 pause = ofpraw_alloc_xid(OFPRAW_NXT_FLOW_MONITOR_PAUSED,
2217 OFP10_VERSION, htonl(0), 0);
2218 ofconn_send(ofconn, pause, ofconn->monitor_counter);
2225 ofmonitor_resume(struct ofconn *ofconn)
2226 OVS_REQUIRES(ofproto_mutex)
2228 struct rule_collection rules;
2229 struct ofpbuf *resumed;
2230 struct ofmonitor *m;
2233 rule_collection_init(&rules);
2234 HMAP_FOR_EACH (m, ofconn_node, &ofconn->monitors) {
2235 ofmonitor_collect_resume_rules(m, ofconn->monitor_paused, &rules);
2239 ofmonitor_compose_refresh_updates(&rules, &msgs);
2241 resumed = ofpraw_alloc_xid(OFPRAW_NXT_FLOW_MONITOR_RESUMED, OFP10_VERSION,
2243 list_push_back(&msgs, &resumed->list_node);
2244 ofconn_send_replies(ofconn, &msgs);
2246 ofconn->monitor_paused = 0;
2250 ofmonitor_may_resume(const struct ofconn *ofconn)
2251 OVS_REQUIRES(ofproto_mutex)
2253 return (ofconn->monitor_paused != 0
2254 && !rconn_packet_counter_n_packets(ofconn->monitor_counter));
2258 ofmonitor_run(struct connmgr *mgr)
2260 struct ofconn *ofconn;
2262 ovs_mutex_lock(&ofproto_mutex);
2263 LIST_FOR_EACH (ofconn, node, &mgr->all_conns) {
2264 if (ofmonitor_may_resume(ofconn)) {
2265 COVERAGE_INC(ofmonitor_resume);
2266 ofmonitor_resume(ofconn);
2269 ovs_mutex_unlock(&ofproto_mutex);
2273 ofmonitor_wait(struct connmgr *mgr)
2275 struct ofconn *ofconn;
2277 ovs_mutex_lock(&ofproto_mutex);
2278 LIST_FOR_EACH (ofconn, node, &mgr->all_conns) {
2279 if (ofmonitor_may_resume(ofconn)) {
2280 poll_immediate_wake();
2283 ovs_mutex_unlock(&ofproto_mutex);