2 * Copyright (c) 2009, 2010, 2011, 2012, 2013, 2014, 2015 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"
42 #include "openvswitch/vconn.h"
43 #include "openvswitch/vlog.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 ovs_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 ovs_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 ovs_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 ovs_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);
738 struct sockaddr_storage ss;
739 struct sockaddr_in in;
742 if (ofconn->band == OFPROTO_IN_BAND
743 && stream_parse_target_with_default_port(target, OFP_OLD_PORT,
745 && sa.ss.ss_family == AF_INET) {
746 addrs[n_addrs++] = sa.in;
749 for (i = 0; i < mgr->n_extra_remotes; i++) {
750 addrs[n_addrs++] = mgr->extra_in_band_remotes[i];
753 /* Create or update or destroy in-band. */
756 in_band_create(mgr->ofproto, mgr->local_port_name, &mgr->in_band);
758 in_band_set_queue(mgr->in_band, mgr->in_band_queue);
760 /* in_band_run() needs a chance to delete any existing in-band flows.
761 * We will destroy mgr->in_band after it's done with that. */
764 in_band_set_remotes(mgr->in_band, addrs, n_addrs);
772 update_fail_open(struct connmgr *mgr)
773 OVS_EXCLUDED(ofproto_mutex)
775 if (connmgr_has_controllers(mgr)
776 && mgr->fail_mode == OFPROTO_FAIL_STANDALONE) {
777 if (!mgr->fail_open) {
778 mgr->fail_open = fail_open_create(mgr->ofproto, mgr);
781 fail_open_destroy(mgr->fail_open);
782 mgr->fail_open = NULL;
787 set_pvconns(struct pvconn ***pvconnsp, size_t *n_pvconnsp,
788 const struct sset *sset)
790 struct pvconn **pvconns = *pvconnsp;
791 size_t n_pvconns = *n_pvconnsp;
796 for (i = 0; i < n_pvconns; i++) {
797 pvconn_close(pvconns[i]);
801 pvconns = xmalloc(sset_count(sset) * sizeof *pvconns);
803 SSET_FOR_EACH (name, sset) {
804 struct pvconn *pvconn;
806 error = pvconn_open(name, 0, 0, &pvconn);
808 pvconns[n_pvconns++] = pvconn;
810 VLOG_ERR("failed to listen on %s: %s", name, ovs_strerror(error));
818 *n_pvconnsp = n_pvconns;
823 /* Returns a "preference level" for snooping 'ofconn'. A higher return value
824 * means that 'ofconn' is more interesting for monitoring than a lower return
827 snoop_preference(const struct ofconn *ofconn)
829 switch (ofconn->role) {
830 case OFPCR12_ROLE_MASTER:
832 case OFPCR12_ROLE_EQUAL:
834 case OFPCR12_ROLE_SLAVE:
836 case OFPCR12_ROLE_NOCHANGE:
838 /* Shouldn't happen. */
843 /* One of 'mgr''s "snoop" pvconns has accepted a new connection on 'vconn'.
844 * Connects this vconn to a controller. */
846 add_snooper(struct connmgr *mgr, struct vconn *vconn)
848 struct ofconn *ofconn, *best;
850 /* Pick a controller for monitoring. */
852 LIST_FOR_EACH (ofconn, node, &mgr->all_conns) {
853 if (ofconn->type == OFCONN_PRIMARY
854 && (!best || snoop_preference(ofconn) > snoop_preference(best))) {
860 rconn_add_monitor(best->rconn, vconn);
862 VLOG_INFO_RL(&rl, "no controller connection to snoop");
867 /* Public ofconn functions. */
869 /* Returns the connection type, either OFCONN_PRIMARY or OFCONN_SERVICE. */
871 ofconn_get_type(const struct ofconn *ofconn)
876 /* If a master election id is defined, stores it into '*idp' and returns
877 * true. Otherwise, stores UINT64_MAX into '*idp' and returns false. */
879 ofconn_get_master_election_id(const struct ofconn *ofconn, uint64_t *idp)
881 *idp = (ofconn->connmgr->master_election_id_defined
882 ? ofconn->connmgr->master_election_id
884 return ofconn->connmgr->master_election_id_defined;
887 /* Sets the master election id.
889 * Returns true if successful, false if the id is stale
892 ofconn_set_master_election_id(struct ofconn *ofconn, uint64_t id)
894 if (ofconn->connmgr->master_election_id_defined
896 /* Unsigned difference interpreted as a two's complement signed
898 (int64_t)(id - ofconn->connmgr->master_election_id) < 0) {
901 ofconn->connmgr->master_election_id = id;
902 ofconn->connmgr->master_election_id_defined = true;
907 /* Returns the role configured for 'ofconn'.
909 * The default role, if no other role has been set, is OFPCR12_ROLE_EQUAL. */
910 enum ofp12_controller_role
911 ofconn_get_role(const struct ofconn *ofconn)
917 ofconn_send_role_status(struct ofconn *ofconn, uint32_t role, uint8_t reason)
919 struct ofputil_role_status status;
922 status.reason = reason;
924 ofconn_get_master_election_id(ofconn, &status.generation_id);
926 buf = ofputil_encode_role_status(&status, ofconn_get_protocol(ofconn));
928 ofconn_send(ofconn, buf, NULL);
932 /* Changes 'ofconn''s role to 'role'. If 'role' is OFPCR12_ROLE_MASTER then
933 * any existing master is demoted to a slave. */
935 ofconn_set_role(struct ofconn *ofconn, enum ofp12_controller_role role)
937 if (role != ofconn->role && role == OFPCR12_ROLE_MASTER) {
938 struct ofconn *other;
940 LIST_FOR_EACH (other, node, &ofconn->connmgr->all_conns) {
941 if (other->role == OFPCR12_ROLE_MASTER) {
942 other->role = OFPCR12_ROLE_SLAVE;
943 ofconn_send_role_status(other, OFPCR12_ROLE_SLAVE, OFPCRR_MASTER_REQUEST);
951 ofconn_set_invalid_ttl_to_controller(struct ofconn *ofconn, bool enable)
953 uint32_t bit = 1u << OFPR_INVALID_TTL;
955 ofconn->master_async_config[OAM_PACKET_IN] |= bit;
957 ofconn->master_async_config[OAM_PACKET_IN] &= ~bit;
962 ofconn_get_invalid_ttl_to_controller(struct ofconn *ofconn)
964 uint32_t bit = 1u << OFPR_INVALID_TTL;
965 return (ofconn->master_async_config[OAM_PACKET_IN] & bit) != 0;
968 /* Returns the currently configured protocol for 'ofconn', one of OFPUTIL_P_*.
970 * Returns OFPUTIL_P_NONE, which is not a valid protocol, if 'ofconn' hasn't
971 * completed version negotiation. This can't happen if at least one OpenFlow
972 * message, other than OFPT_HELLO, has been received on the connection (such as
973 * in ofproto.c's message handling code), since version negotiation is a
974 * prerequisite for starting to receive messages. This means that
975 * OFPUTIL_P_NONE is a special case that most callers need not worry about. */
976 enum ofputil_protocol
977 ofconn_get_protocol(const struct ofconn *ofconn)
979 if (ofconn->protocol == OFPUTIL_P_NONE &&
980 rconn_is_connected(ofconn->rconn)) {
981 int version = rconn_get_version(ofconn->rconn);
983 ofconn_set_protocol(CONST_CAST(struct ofconn *, ofconn),
984 ofputil_protocol_from_ofp_version(version));
988 return ofconn->protocol;
991 /* Sets the protocol for 'ofconn' to 'protocol' (one of OFPUTIL_P_*).
993 * (This doesn't actually send anything to accomplish this. Presumably the
994 * caller already did that.) */
996 ofconn_set_protocol(struct ofconn *ofconn, enum ofputil_protocol protocol)
998 ofconn->protocol = protocol;
999 if (!(protocol & OFPUTIL_P_OF14_UP)) {
1000 uint32_t *master = ofconn->master_async_config;
1001 uint32_t *slave = ofconn->slave_async_config;
1003 /* OFPR_ACTION_SET is not supported before OF1.4 */
1004 master[OAM_PACKET_IN] &= ~(1u << OFPR_ACTION_SET);
1005 slave [OAM_PACKET_IN] &= ~(1u << OFPR_ACTION_SET);
1007 /* OFPR_GROUP is not supported before OF1.4 */
1008 master[OAM_PACKET_IN] &= ~(1u << OFPR_GROUP);
1009 slave [OAM_PACKET_IN] &= ~(1u << OFPR_GROUP);
1013 /* Returns the currently configured packet in format for 'ofconn', one of
1016 * The default, if no other format has been set, is NXPIF_OPENFLOW10. */
1017 enum nx_packet_in_format
1018 ofconn_get_packet_in_format(struct ofconn *ofconn)
1020 return ofconn->packet_in_format;
1023 /* Sets the packet in format for 'ofconn' to 'packet_in_format' (one of
1026 ofconn_set_packet_in_format(struct ofconn *ofconn,
1027 enum nx_packet_in_format packet_in_format)
1029 ofconn->packet_in_format = packet_in_format;
1032 /* Sets the controller connection ID for 'ofconn' to 'controller_id'.
1034 * The connection controller ID is used for OFPP_CONTROLLER and
1035 * NXAST_CONTROLLER actions. See "struct nx_action_controller" for details. */
1037 ofconn_set_controller_id(struct ofconn *ofconn, uint16_t controller_id)
1039 ofconn->controller_id = controller_id;
1042 /* Returns the default miss send length for 'ofconn'. */
1044 ofconn_get_miss_send_len(const struct ofconn *ofconn)
1046 return ofconn->miss_send_len;
1049 /* Sets the default miss send length for 'ofconn' to 'miss_send_len'. */
1051 ofconn_set_miss_send_len(struct ofconn *ofconn, int miss_send_len)
1053 ofconn->miss_send_len = miss_send_len;
1057 ofconn_set_async_config(struct ofconn *ofconn,
1058 const uint32_t master_masks[OAM_N_TYPES],
1059 const uint32_t slave_masks[OAM_N_TYPES])
1061 size_t size = sizeof ofconn->master_async_config;
1062 memcpy(ofconn->master_async_config, master_masks, size);
1063 memcpy(ofconn->slave_async_config, slave_masks, size);
1067 ofconn_get_async_config(struct ofconn *ofconn,
1068 uint32_t *master_masks, uint32_t *slave_masks)
1070 size_t size = sizeof ofconn->master_async_config;
1072 /* Make sure we know the protocol version and the async_config
1073 * masks are properly updated by calling ofconn_get_protocol() */
1074 if (OFPUTIL_P_NONE == ofconn_get_protocol(ofconn)){
1078 memcpy(master_masks, ofconn->master_async_config, size);
1079 memcpy(slave_masks, ofconn->slave_async_config, size);
1082 /* Sends 'msg' on 'ofconn', accounting it as a reply. (If there is a
1083 * sufficient number of OpenFlow replies in-flight on a single ofconn, then the
1084 * connmgr will stop accepting new OpenFlow requests on that ofconn until the
1085 * controller has accepted some of the replies.) */
1087 ofconn_send_reply(const struct ofconn *ofconn, struct ofpbuf *msg)
1089 ofconn_send(ofconn, msg, ofconn->reply_counter);
1092 /* Sends each of the messages in list 'replies' on 'ofconn' in order,
1093 * accounting them as replies. */
1095 ofconn_send_replies(const struct ofconn *ofconn, struct ovs_list *replies)
1097 struct ofpbuf *reply, *next;
1099 LIST_FOR_EACH_SAFE (reply, next, list_node, replies) {
1100 list_remove(&reply->list_node);
1101 ofconn_send_reply(ofconn, reply);
1105 /* Sends 'error' on 'ofconn', as a reply to 'request'. Only at most the
1106 * first 64 bytes of 'request' are used. */
1108 ofconn_send_error(const struct ofconn *ofconn,
1109 const struct ofp_header *request, enum ofperr error)
1111 static struct vlog_rate_limit err_rl = VLOG_RATE_LIMIT_INIT(10, 10);
1112 struct ofpbuf *reply;
1114 reply = ofperr_encode_reply(error, request);
1115 if (!VLOG_DROP_INFO(&err_rl)) {
1116 const char *type_name;
1120 request_len = ntohs(request->length);
1121 type_name = (!ofpraw_decode_partial(&raw, request,
1122 MIN(64, request_len))
1123 ? ofpraw_get_name(raw)
1126 VLOG_INFO("%s: sending %s error reply to %s message",
1127 rconn_get_name(ofconn->rconn), ofperr_to_string(error),
1130 ofconn_send_reply(ofconn, reply);
1133 /* Same as pktbuf_retrieve(), using the pktbuf owned by 'ofconn'. */
1135 ofconn_pktbuf_retrieve(struct ofconn *ofconn, uint32_t id,
1136 struct ofpbuf **bufferp, ofp_port_t *in_port)
1138 return pktbuf_retrieve(ofconn->pktbuf, id, bufferp, in_port);
1141 /* Reports that a flow_mod operation of the type specified by 'command' was
1142 * successfully executed by 'ofconn', so that the connmgr can log it. */
1144 ofconn_report_flow_mod(struct ofconn *ofconn,
1145 enum ofp_flow_mod_command command)
1155 case OFPFC_MODIFY_STRICT:
1160 case OFPFC_DELETE_STRICT:
1166 if (ofconn->next_op_report == LLONG_MAX) {
1167 ofconn->first_op = now;
1168 ofconn->next_op_report = MAX(now + 10 * 1000, ofconn->op_backoff);
1169 ofconn->op_backoff = ofconn->next_op_report + 60 * 1000;
1171 ofconn->last_op = now;
1175 ofconn_get_bundles(struct ofconn *ofconn)
1177 return &ofconn->bundles;
1181 /* Private ofconn functions. */
1184 ofconn_get_target(const struct ofconn *ofconn)
1186 return rconn_get_target(ofconn->rconn);
1189 static struct ofconn *
1190 ofconn_create(struct connmgr *mgr, struct rconn *rconn, enum ofconn_type type,
1191 bool enable_async_msgs)
1193 struct ofconn *ofconn;
1195 ofconn = xzalloc(sizeof *ofconn);
1196 ofconn->connmgr = mgr;
1197 list_push_back(&mgr->all_conns, &ofconn->node);
1198 ofconn->rconn = rconn;
1199 ofconn->type = type;
1200 ofconn->enable_async_msgs = enable_async_msgs;
1202 hmap_init(&ofconn->monitors);
1203 list_init(&ofconn->updates);
1205 hmap_init(&ofconn->bundles);
1207 ofconn_flush(ofconn);
1212 /* Clears all of the state in 'ofconn' that should not persist from one
1213 * connection to the next. */
1215 ofconn_flush(struct ofconn *ofconn)
1216 OVS_REQUIRES(ofproto_mutex)
1218 struct ofmonitor *monitor, *next_monitor;
1221 ofconn_log_flow_mods(ofconn);
1223 ofconn->role = OFPCR12_ROLE_EQUAL;
1224 ofconn_set_protocol(ofconn, OFPUTIL_P_NONE);
1225 ofconn->packet_in_format = NXPIF_OPENFLOW10;
1227 rconn_packet_counter_destroy(ofconn->packet_in_counter);
1228 ofconn->packet_in_counter = rconn_packet_counter_create();
1229 for (i = 0; i < N_SCHEDULERS; i++) {
1230 if (ofconn->schedulers[i]) {
1233 pinsched_get_limits(ofconn->schedulers[i], &rate, &burst);
1234 pinsched_destroy(ofconn->schedulers[i]);
1235 ofconn->schedulers[i] = pinsched_create(rate, burst);
1238 if (ofconn->pktbuf) {
1239 pktbuf_destroy(ofconn->pktbuf);
1240 ofconn->pktbuf = pktbuf_create();
1242 ofconn->miss_send_len = (ofconn->type == OFCONN_PRIMARY
1243 ? OFP_DEFAULT_MISS_SEND_LEN
1245 ofconn->controller_id = 0;
1247 rconn_packet_counter_destroy(ofconn->reply_counter);
1248 ofconn->reply_counter = rconn_packet_counter_create();
1250 if (ofconn->enable_async_msgs) {
1251 uint32_t *master = ofconn->master_async_config;
1252 uint32_t *slave = ofconn->slave_async_config;
1254 /* "master" and "other" roles get all asynchronous messages by default,
1255 * except that the controller needs to enable nonstandard "packet-in"
1256 * reasons itself. */
1257 master[OAM_PACKET_IN] = ((1u << OFPR_NO_MATCH)
1258 | (1u << OFPR_ACTION)
1259 | (1u << OFPR_ACTION_SET)
1260 | (1u << OFPR_GROUP));
1261 master[OAM_PORT_STATUS] = ((1u << OFPPR_ADD)
1262 | (1u << OFPPR_DELETE)
1263 | (1u << OFPPR_MODIFY));
1264 master[OAM_FLOW_REMOVED] = ((1u << OFPRR_IDLE_TIMEOUT)
1265 | (1u << OFPRR_HARD_TIMEOUT)
1266 | (1u << OFPRR_DELETE));
1268 /* "slave" role gets port status updates by default. */
1269 slave[OAM_PACKET_IN] = 0;
1270 slave[OAM_PORT_STATUS] = ((1u << OFPPR_ADD)
1271 | (1u << OFPPR_DELETE)
1272 | (1u << OFPPR_MODIFY));
1273 slave[OAM_FLOW_REMOVED] = 0;
1275 memset(ofconn->master_async_config, 0,
1276 sizeof ofconn->master_async_config);
1277 memset(ofconn->slave_async_config, 0,
1278 sizeof ofconn->slave_async_config);
1281 ofconn->n_add = ofconn->n_delete = ofconn->n_modify = 0;
1282 ofconn->first_op = ofconn->last_op = LLONG_MIN;
1283 ofconn->next_op_report = LLONG_MAX;
1284 ofconn->op_backoff = LLONG_MIN;
1286 HMAP_FOR_EACH_SAFE (monitor, next_monitor, ofconn_node,
1287 &ofconn->monitors) {
1288 ofmonitor_destroy(monitor);
1290 rconn_packet_counter_destroy(ofconn->monitor_counter);
1291 ofconn->monitor_counter = rconn_packet_counter_create();
1292 ofpbuf_list_delete(&ofconn->updates); /* ...but it should be empty. */
1296 ofconn_destroy(struct ofconn *ofconn)
1297 OVS_REQUIRES(ofproto_mutex)
1299 ofconn_flush(ofconn);
1301 if (ofconn->type == OFCONN_PRIMARY) {
1302 hmap_remove(&ofconn->connmgr->controllers, &ofconn->hmap_node);
1305 ofp_bundle_remove_all(ofconn);
1306 hmap_destroy(&ofconn->bundles);
1308 hmap_destroy(&ofconn->monitors);
1309 list_remove(&ofconn->node);
1310 rconn_destroy(ofconn->rconn);
1311 rconn_packet_counter_destroy(ofconn->packet_in_counter);
1312 rconn_packet_counter_destroy(ofconn->reply_counter);
1313 pktbuf_destroy(ofconn->pktbuf);
1314 rconn_packet_counter_destroy(ofconn->monitor_counter);
1318 /* Reconfigures 'ofconn' to match 'c'. 'ofconn' and 'c' must have the same
1321 ofconn_reconfigure(struct ofconn *ofconn, const struct ofproto_controller *c)
1325 ofconn->band = c->band;
1326 ofconn->enable_async_msgs = c->enable_async_msgs;
1328 rconn_set_max_backoff(ofconn->rconn, c->max_backoff);
1330 probe_interval = c->probe_interval ? MAX(c->probe_interval, 5) : 0;
1331 rconn_set_probe_interval(ofconn->rconn, probe_interval);
1333 ofconn_set_rate_limit(ofconn, c->rate_limit, c->burst_limit);
1335 /* If dscp value changed reconnect. */
1336 if (c->dscp != rconn_get_dscp(ofconn->rconn)) {
1337 rconn_set_dscp(ofconn->rconn, c->dscp);
1338 rconn_reconnect(ofconn->rconn);
1342 /* Returns true if it makes sense for 'ofconn' to receive and process OpenFlow
1345 ofconn_may_recv(const struct ofconn *ofconn)
1347 int count = rconn_packet_counter_n_packets(ofconn->reply_counter);
1348 return count < OFCONN_REPLY_MAX;
1352 ofconn_run(struct ofconn *ofconn,
1353 void (*handle_openflow)(struct ofconn *,
1354 const struct ofpbuf *ofp_msg))
1356 struct connmgr *mgr = ofconn->connmgr;
1359 for (i = 0; i < N_SCHEDULERS; i++) {
1360 struct ovs_list txq;
1362 pinsched_run(ofconn->schedulers[i], &txq);
1363 do_send_packet_ins(ofconn, &txq);
1366 rconn_run(ofconn->rconn);
1368 /* Limit the number of iterations to avoid starving other tasks. */
1369 for (i = 0; i < 50 && ofconn_may_recv(ofconn); i++) {
1370 struct ofpbuf *of_msg = rconn_recv(ofconn->rconn);
1375 if (mgr->fail_open) {
1376 fail_open_maybe_recover(mgr->fail_open);
1379 handle_openflow(ofconn, of_msg);
1380 ofpbuf_delete(of_msg);
1383 if (time_msec() >= ofconn->next_op_report) {
1384 ofconn_log_flow_mods(ofconn);
1387 ovs_mutex_lock(&ofproto_mutex);
1388 if (!rconn_is_alive(ofconn->rconn)) {
1389 ofconn_destroy(ofconn);
1390 } else if (!rconn_is_connected(ofconn->rconn)) {
1391 ofconn_flush(ofconn);
1393 ovs_mutex_unlock(&ofproto_mutex);
1397 ofconn_wait(struct ofconn *ofconn)
1401 for (i = 0; i < N_SCHEDULERS; i++) {
1402 pinsched_wait(ofconn->schedulers[i]);
1404 rconn_run_wait(ofconn->rconn);
1405 if (ofconn_may_recv(ofconn)) {
1406 rconn_recv_wait(ofconn->rconn);
1408 if (ofconn->next_op_report != LLONG_MAX) {
1409 poll_timer_wait_until(ofconn->next_op_report);
1414 ofconn_log_flow_mods(struct ofconn *ofconn)
1416 int n_flow_mods = ofconn->n_add + ofconn->n_delete + ofconn->n_modify;
1418 long long int ago = (time_msec() - ofconn->first_op) / 1000;
1419 long long int interval = (ofconn->last_op - ofconn->first_op) / 1000;
1423 ds_put_format(&s, "%d flow_mods ", n_flow_mods);
1424 if (interval == ago) {
1425 ds_put_format(&s, "in the last %lld s", ago);
1426 } else if (interval) {
1427 ds_put_format(&s, "in the %lld s starting %lld s ago",
1430 ds_put_format(&s, "%lld s ago", ago);
1433 ds_put_cstr(&s, " (");
1434 if (ofconn->n_add) {
1435 ds_put_format(&s, "%d adds, ", ofconn->n_add);
1437 if (ofconn->n_delete) {
1438 ds_put_format(&s, "%d deletes, ", ofconn->n_delete);
1440 if (ofconn->n_modify) {
1441 ds_put_format(&s, "%d modifications, ", ofconn->n_modify);
1444 ds_put_char(&s, ')');
1446 VLOG_INFO("%s: %s", rconn_get_name(ofconn->rconn), ds_cstr(&s));
1449 ofconn->n_add = ofconn->n_delete = ofconn->n_modify = 0;
1451 ofconn->next_op_report = LLONG_MAX;
1454 /* Returns true if 'ofconn' should receive asynchronous messages of the given
1455 * OAM_* 'type' and 'reason', which should be a OFPR_* value for OAM_PACKET_IN,
1456 * a OFPPR_* value for OAM_PORT_STATUS, or an OFPRR_* value for
1457 * OAM_FLOW_REMOVED. Returns false if the message should not be sent on
1460 ofconn_receives_async_msg(const struct ofconn *ofconn,
1461 enum ofconn_async_msg_type type,
1462 unsigned int reason)
1464 const uint32_t *async_config;
1466 ovs_assert(reason < 32);
1467 ovs_assert((unsigned int) type < OAM_N_TYPES);
1469 if (ofconn_get_protocol(ofconn) == OFPUTIL_P_NONE
1470 || !rconn_is_connected(ofconn->rconn)) {
1474 /* Keep the following code in sync with the documentation in the
1475 * "Asynchronous Messages" section in DESIGN. */
1477 if (ofconn->type == OFCONN_SERVICE && !ofconn->miss_send_len) {
1478 /* Service connections don't get asynchronous messages unless they have
1479 * explicitly asked for them by setting a nonzero miss send length. */
1483 async_config = (ofconn->role == OFPCR12_ROLE_SLAVE
1484 ? ofconn->slave_async_config
1485 : ofconn->master_async_config);
1486 if (!(async_config[type] & (1u << reason))) {
1493 /* The default "table-miss" behaviour for OpenFlow1.3+ is to drop the
1494 * packet rather than to send the packet to the controller.
1496 * This function returns false to indicate the packet should be dropped if
1497 * the controller action was the result of the default table-miss behaviour
1498 * and the controller is using OpenFlow1.3+.
1500 * Otherwise true is returned to indicate the packet should be forwarded to
1503 ofconn_wants_packet_in_on_miss(struct ofconn *ofconn,
1504 const struct ofproto_packet_in *pin)
1506 if (pin->miss_type == OFPROTO_PACKET_IN_MISS_WITHOUT_FLOW) {
1507 enum ofputil_protocol protocol = ofconn_get_protocol(ofconn);
1509 if (protocol != OFPUTIL_P_NONE
1510 && ofputil_protocol_to_ofp_version(protocol) >= OFP13_VERSION
1511 && (ofproto_table_get_miss_config(ofconn->connmgr->ofproto,
1513 == OFPUTIL_TABLE_MISS_DEFAULT)) {
1520 /* The default "table-miss" behaviour for OpenFlow1.3+ is to drop the
1521 * packet rather than to send the packet to the controller.
1523 * This function returns true to indicate that a packet_in message
1524 * for a "table-miss" should be sent to at least one controller.
1525 * That is there is at least one controller with controller_id 0
1526 * which connected using an OpenFlow version earlier than OpenFlow1.3.
1530 * This logic assumes that "table-miss" packet_in messages
1531 * are always sent to controller_id 0. */
1533 connmgr_wants_packet_in_on_miss(struct connmgr *mgr) OVS_EXCLUDED(ofproto_mutex)
1535 struct ofconn *ofconn;
1537 ovs_mutex_lock(&ofproto_mutex);
1538 LIST_FOR_EACH (ofconn, node, &mgr->all_conns) {
1539 enum ofputil_protocol protocol = ofconn_get_protocol(ofconn);
1541 if (ofconn->controller_id == 0 &&
1542 (protocol == OFPUTIL_P_NONE ||
1543 ofputil_protocol_to_ofp_version(protocol) < OFP13_VERSION)) {
1544 ovs_mutex_unlock(&ofproto_mutex);
1548 ovs_mutex_unlock(&ofproto_mutex);
1553 /* Returns a human-readable name for an OpenFlow connection between 'mgr' and
1554 * 'target', suitable for use in log messages for identifying the connection.
1556 * The name is dynamically allocated. The caller should free it (with free())
1557 * when it is no longer needed. */
1559 ofconn_make_name(const struct connmgr *mgr, const char *target)
1561 return xasprintf("%s<->%s", mgr->name, target);
1565 ofconn_set_rate_limit(struct ofconn *ofconn, int rate, int burst)
1569 for (i = 0; i < N_SCHEDULERS; i++) {
1570 struct pinsched **s = &ofconn->schedulers[i];
1574 *s = pinsched_create(rate, burst);
1576 pinsched_set_limits(*s, rate, burst);
1579 pinsched_destroy(*s);
1586 ofconn_send(const struct ofconn *ofconn, struct ofpbuf *msg,
1587 struct rconn_packet_counter *counter)
1589 ofpmsg_update_length(msg);
1590 rconn_send(ofconn->rconn, msg, counter);
1593 /* Sending asynchronous messages. */
1595 static void schedule_packet_in(struct ofconn *, struct ofproto_packet_in,
1596 enum ofp_packet_in_reason wire_reason);
1598 /* Sends an OFPT_PORT_STATUS message with 'opp' and 'reason' to appropriate
1599 * controllers managed by 'mgr'. For messages caused by a controller
1600 * OFPT_PORT_MOD, specify 'source' as the controller connection that sent the
1601 * request; otherwise, specify 'source' as NULL. */
1603 connmgr_send_port_status(struct connmgr *mgr, struct ofconn *source,
1604 const struct ofputil_phy_port *pp, uint8_t reason)
1606 /* XXX Should limit the number of queued port status change messages. */
1607 struct ofputil_port_status ps;
1608 struct ofconn *ofconn;
1612 LIST_FOR_EACH (ofconn, node, &mgr->all_conns) {
1613 if (ofconn_receives_async_msg(ofconn, OAM_PORT_STATUS, reason)) {
1616 /* Before 1.5, OpenFlow specified that OFPT_PORT_MOD should not
1617 * generate OFPT_PORT_STATUS messages. That requirement was a
1618 * relic of how OpenFlow originally supported a single controller,
1619 * so that one could expect the controller to already know the
1620 * changes it had made.
1622 * EXT-338 changes OpenFlow 1.5 OFPT_PORT_MOD to send
1623 * OFPT_PORT_STATUS messages to every controller. This is
1624 * obviously more useful in the multi-controller case. We could
1625 * always implement it that way in OVS, but that would risk
1626 * confusing controllers that are intended for single-controller
1627 * use only. (Imagine a controller that generates an OFPT_PORT_MOD
1628 * in response to any OFPT_PORT_STATUS!)
1630 * So this compromises: for OpenFlow 1.4 and earlier, it generates
1631 * OFPT_PORT_STATUS for OFPT_PORT_MOD, but not back to the
1632 * originating controller. In a single-controller environment, in
1633 * particular, this means that it will never generate
1634 * OFPT_PORT_STATUS for OFPT_PORT_MOD at all. */
1635 if (ofconn == source
1636 && rconn_get_version(ofconn->rconn) < OFP15_VERSION) {
1640 msg = ofputil_encode_port_status(&ps, ofconn_get_protocol(ofconn));
1641 ofconn_send(ofconn, msg, NULL);
1646 /* Sends an OFPT_FLOW_REMOVED or NXT_FLOW_REMOVED message based on 'fr' to
1647 * appropriate controllers managed by 'mgr'. */
1649 connmgr_send_flow_removed(struct connmgr *mgr,
1650 const struct ofputil_flow_removed *fr)
1652 struct ofconn *ofconn;
1654 LIST_FOR_EACH (ofconn, node, &mgr->all_conns) {
1655 if (ofconn_receives_async_msg(ofconn, OAM_FLOW_REMOVED, fr->reason)) {
1658 /* Account flow expirations as replies to OpenFlow requests. That
1659 * works because preventing OpenFlow requests from being processed
1660 * also prevents new flows from being added (and expiring). (It
1661 * also prevents processing OpenFlow requests that would not add
1662 * new flows, so it is imperfect.) */
1663 msg = ofputil_encode_flow_removed(fr, ofconn_get_protocol(ofconn));
1664 ofconn_send_reply(ofconn, msg);
1669 /* Normally a send-to-controller action uses reason OFPR_ACTION. However, in
1670 * OpenFlow 1.3 and later, packet_ins generated by a send-to-controller action
1671 * in a "table-miss" flow (one with priority 0 and completely wildcarded) are
1672 * sent as OFPR_NO_MATCH. This function returns the reason that should
1673 * actually be sent on 'ofconn' for 'pin'. */
1674 static enum ofp_packet_in_reason
1675 wire_reason(struct ofconn *ofconn, const struct ofproto_packet_in *pin)
1677 enum ofputil_protocol protocol = ofconn_get_protocol(ofconn);
1679 if (pin->miss_type == OFPROTO_PACKET_IN_MISS_FLOW
1680 && pin->up.reason == OFPR_ACTION
1681 && protocol != OFPUTIL_P_NONE
1682 && ofputil_protocol_to_ofp_version(protocol) >= OFP13_VERSION) {
1683 return OFPR_NO_MATCH;
1686 switch (pin->up.reason) {
1687 case OFPR_ACTION_SET:
1689 case OFPR_PACKET_OUT:
1690 if (!(protocol & OFPUTIL_P_OF14_UP)) {
1691 /* Only supported in OF1.4+ */
1697 case OFPR_INVALID_TTL:
1698 case OFPR_N_REASONS:
1700 return pin->up.reason;
1704 /* Given 'pin', sends an OFPT_PACKET_IN message to each OpenFlow controller as
1705 * necessary according to their individual configurations.
1707 * The caller doesn't need to fill in pin->buffer_id or pin->total_len. */
1709 connmgr_send_packet_in(struct connmgr *mgr,
1710 const struct ofproto_packet_in *pin)
1712 struct ofconn *ofconn;
1714 LIST_FOR_EACH (ofconn, node, &mgr->all_conns) {
1715 enum ofp_packet_in_reason reason = wire_reason(ofconn, pin);
1717 if (ofconn_wants_packet_in_on_miss(ofconn, pin)
1718 && ofconn_receives_async_msg(ofconn, OAM_PACKET_IN, reason)
1719 && ofconn->controller_id == pin->controller_id) {
1720 schedule_packet_in(ofconn, *pin, reason);
1726 do_send_packet_ins(struct ofconn *ofconn, struct ovs_list *txq)
1728 struct ofpbuf *pin, *next_pin;
1730 LIST_FOR_EACH_SAFE (pin, next_pin, list_node, txq) {
1731 list_remove(&pin->list_node);
1733 if (rconn_send_with_limit(ofconn->rconn, pin,
1734 ofconn->packet_in_counter, 100) == EAGAIN) {
1735 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 5);
1737 VLOG_INFO_RL(&rl, "%s: dropping packet-in due to queue overflow",
1738 rconn_get_name(ofconn->rconn));
1743 /* Takes 'pin', composes an OpenFlow packet-in message from it, and passes it
1744 * to 'ofconn''s packet scheduler for sending. */
1746 schedule_packet_in(struct ofconn *ofconn, struct ofproto_packet_in pin,
1747 enum ofp_packet_in_reason wire_reason)
1749 struct connmgr *mgr = ofconn->connmgr;
1750 uint16_t controller_max_len;
1751 struct ovs_list txq;
1753 pin.up.total_len = pin.up.packet_len;
1755 pin.up.reason = wire_reason;
1756 if (pin.up.reason == OFPR_ACTION) {
1757 controller_max_len = pin.send_len; /* max_len */
1759 controller_max_len = ofconn->miss_send_len;
1762 /* Get OpenFlow buffer_id.
1763 * For OpenFlow 1.2+, OFPCML_NO_BUFFER (== UINT16_MAX) specifies
1764 * unbuffered. This behaviour doesn't violate prior versions, too. */
1765 if (controller_max_len == UINT16_MAX) {
1766 pin.up.buffer_id = UINT32_MAX;
1767 } else if (mgr->fail_open && fail_open_is_active(mgr->fail_open)) {
1768 pin.up.buffer_id = pktbuf_get_null();
1769 } else if (!ofconn->pktbuf) {
1770 pin.up.buffer_id = UINT32_MAX;
1772 pin.up.buffer_id = pktbuf_save(ofconn->pktbuf,
1773 pin.up.packet, pin.up.packet_len,
1774 pin.up.fmd.in_port);
1777 /* Figure out how much of the packet to send.
1778 * If not buffered, send the entire packet. Otherwise, depending on
1779 * the reason of packet-in, send what requested by the controller. */
1780 if (pin.up.buffer_id != UINT32_MAX
1781 && controller_max_len < pin.up.packet_len) {
1782 pin.up.packet_len = controller_max_len;
1785 /* Make OFPT_PACKET_IN and hand over to packet scheduler. */
1786 pinsched_send(ofconn->schedulers[pin.up.reason == OFPR_NO_MATCH ? 0 : 1],
1788 ofputil_encode_packet_in(&pin.up,
1789 ofconn_get_protocol(ofconn),
1790 ofconn->packet_in_format),
1792 do_send_packet_ins(ofconn, &txq);
1795 /* Fail-open settings. */
1797 /* Returns the failure handling mode (OFPROTO_FAIL_SECURE or
1798 * OFPROTO_FAIL_STANDALONE) for 'mgr'. */
1799 enum ofproto_fail_mode
1800 connmgr_get_fail_mode(const struct connmgr *mgr)
1802 return mgr->fail_mode;
1805 /* Sets the failure handling mode for 'mgr' to 'fail_mode' (either
1806 * OFPROTO_FAIL_SECURE or OFPROTO_FAIL_STANDALONE). */
1808 connmgr_set_fail_mode(struct connmgr *mgr, enum ofproto_fail_mode fail_mode)
1810 if (mgr->fail_mode != fail_mode) {
1811 mgr->fail_mode = fail_mode;
1812 update_fail_open(mgr);
1813 if (!connmgr_has_controllers(mgr)) {
1814 ofproto_flush_flows(mgr->ofproto);
1819 /* Fail-open implementation. */
1821 /* Returns the longest probe interval among the primary controllers configured
1822 * on 'mgr'. Returns 0 if there are no primary controllers. */
1824 connmgr_get_max_probe_interval(const struct connmgr *mgr)
1826 const struct ofconn *ofconn;
1827 int max_probe_interval;
1829 max_probe_interval = 0;
1830 HMAP_FOR_EACH (ofconn, hmap_node, &mgr->controllers) {
1831 int probe_interval = rconn_get_probe_interval(ofconn->rconn);
1832 max_probe_interval = MAX(max_probe_interval, probe_interval);
1834 return max_probe_interval;
1837 /* Returns the number of seconds for which all of 'mgr's primary controllers
1838 * have been disconnected. Returns 0 if 'mgr' has no primary controllers. */
1840 connmgr_failure_duration(const struct connmgr *mgr)
1842 const struct ofconn *ofconn;
1843 int min_failure_duration;
1845 if (!connmgr_has_controllers(mgr)) {
1849 min_failure_duration = INT_MAX;
1850 HMAP_FOR_EACH (ofconn, hmap_node, &mgr->controllers) {
1851 int failure_duration = rconn_failure_duration(ofconn->rconn);
1852 min_failure_duration = MIN(min_failure_duration, failure_duration);
1854 return min_failure_duration;
1857 /* Returns true if at least one primary controller is connected (regardless of
1858 * whether those controllers are believed to have authenticated and accepted
1859 * this switch), false if none of them are connected. */
1861 connmgr_is_any_controller_connected(const struct connmgr *mgr)
1863 const struct ofconn *ofconn;
1865 HMAP_FOR_EACH (ofconn, hmap_node, &mgr->controllers) {
1866 if (rconn_is_connected(ofconn->rconn)) {
1873 /* Returns true if at least one primary controller is believed to have
1874 * authenticated and accepted this switch, false otherwise. */
1876 connmgr_is_any_controller_admitted(const struct connmgr *mgr)
1878 const struct ofconn *ofconn;
1880 HMAP_FOR_EACH (ofconn, hmap_node, &mgr->controllers) {
1881 if (rconn_is_admitted(ofconn->rconn)) {
1888 /* In-band configuration. */
1890 static bool any_extras_changed(const struct connmgr *,
1891 const struct sockaddr_in *extras, size_t n);
1893 /* Sets the 'n' TCP port addresses in 'extras' as ones to which 'mgr''s
1894 * in-band control should guarantee access, in the same way that in-band
1895 * control guarantees access to OpenFlow controllers. */
1897 connmgr_set_extra_in_band_remotes(struct connmgr *mgr,
1898 const struct sockaddr_in *extras, size_t n)
1900 if (!any_extras_changed(mgr, extras, n)) {
1904 free(mgr->extra_in_band_remotes);
1905 mgr->n_extra_remotes = n;
1906 mgr->extra_in_band_remotes = xmemdup(extras, n * sizeof *extras);
1908 update_in_band_remotes(mgr);
1911 /* Sets the OpenFlow queue used by flows set up by in-band control on
1912 * 'mgr' to 'queue_id'. If 'queue_id' is negative, then in-band control
1913 * flows will use the default queue. */
1915 connmgr_set_in_band_queue(struct connmgr *mgr, int queue_id)
1917 if (queue_id != mgr->in_band_queue) {
1918 mgr->in_band_queue = queue_id;
1919 update_in_band_remotes(mgr);
1924 any_extras_changed(const struct connmgr *mgr,
1925 const struct sockaddr_in *extras, size_t n)
1929 if (n != mgr->n_extra_remotes) {
1933 for (i = 0; i < n; i++) {
1934 const struct sockaddr_in *old = &mgr->extra_in_band_remotes[i];
1935 const struct sockaddr_in *new = &extras[i];
1937 if (old->sin_addr.s_addr != new->sin_addr.s_addr ||
1938 old->sin_port != new->sin_port) {
1946 /* In-band implementation. */
1949 connmgr_has_in_band(struct connmgr *mgr)
1951 return mgr->in_band != NULL;
1954 /* Fail-open and in-band implementation. */
1956 /* Called by 'ofproto' after all flows have been flushed, to allow fail-open
1957 * and standalone mode to re-create their flows.
1959 * In-band control has more sophisticated code that manages flows itself. */
1961 connmgr_flushed(struct connmgr *mgr)
1962 OVS_EXCLUDED(ofproto_mutex)
1964 if (mgr->fail_open) {
1965 fail_open_flushed(mgr->fail_open);
1968 /* If there are no controllers and we're in standalone mode, set up a flow
1969 * that matches every packet and directs them to OFPP_NORMAL (which goes to
1970 * us). Otherwise, the switch is in secure mode and we won't pass any
1971 * traffic until a controller has been defined and it tells us to do so. */
1972 if (!connmgr_has_controllers(mgr)
1973 && mgr->fail_mode == OFPROTO_FAIL_STANDALONE) {
1974 struct ofpbuf ofpacts;
1977 ofpbuf_init(&ofpacts, OFPACT_OUTPUT_SIZE);
1978 ofpact_put_OUTPUT(&ofpacts)->port = OFPP_NORMAL;
1979 ofpact_pad(&ofpacts);
1981 match_init_catchall(&match);
1982 ofproto_add_flow(mgr->ofproto, &match, 0, ofpbuf_data(&ofpacts),
1983 ofpbuf_size(&ofpacts));
1985 ofpbuf_uninit(&ofpacts);
1989 /* Returns the number of hidden rules created by the in-band and fail-open
1990 * implementations in table 0. (Subtracting this count from the number of
1991 * rules in the table 0 classifier, as returned by classifier_count(), yields
1992 * the number of flows that OVS should report via OpenFlow for table 0.) */
1994 connmgr_count_hidden_rules(const struct connmgr *mgr)
1998 n_hidden += in_band_count_rules(mgr->in_band);
2000 if (mgr->fail_open) {
2001 n_hidden += fail_open_count_rules(mgr->fail_open);
2006 /* Creates a new ofservice for 'target' in 'mgr'. Returns 0 if successful,
2007 * otherwise a positive errno value.
2009 * ofservice_reconfigure() must be called to fully configure the new
2012 ofservice_create(struct connmgr *mgr, const char *target,
2013 uint32_t allowed_versions, uint8_t dscp)
2015 struct ofservice *ofservice;
2016 struct pvconn *pvconn;
2019 error = pvconn_open(target, allowed_versions, dscp, &pvconn);
2024 ofservice = xzalloc(sizeof *ofservice);
2025 hmap_insert(&mgr->services, &ofservice->node, hash_string(target, 0));
2026 ofservice->pvconn = pvconn;
2027 ofservice->allowed_versions = allowed_versions;
2033 ofservice_destroy(struct connmgr *mgr, struct ofservice *ofservice)
2035 hmap_remove(&mgr->services, &ofservice->node);
2036 pvconn_close(ofservice->pvconn);
2041 ofservice_reconfigure(struct ofservice *ofservice,
2042 const struct ofproto_controller *c)
2044 ofservice->probe_interval = c->probe_interval;
2045 ofservice->rate_limit = c->rate_limit;
2046 ofservice->burst_limit = c->burst_limit;
2047 ofservice->enable_async_msgs = c->enable_async_msgs;
2048 ofservice->dscp = c->dscp;
2051 /* Finds and returns the ofservice within 'mgr' that has the given
2052 * 'target', or a null pointer if none exists. */
2053 static struct ofservice *
2054 ofservice_lookup(struct connmgr *mgr, const char *target)
2056 struct ofservice *ofservice;
2058 HMAP_FOR_EACH_WITH_HASH (ofservice, node, hash_string(target, 0),
2060 if (!strcmp(pvconn_get_name(ofservice->pvconn), target)) {
2067 /* Flow monitors (NXST_FLOW_MONITOR). */
2069 /* A counter incremented when something significant happens to an OpenFlow
2072 * - When a rule is added, its 'add_seqno' and 'modify_seqno' are set to
2073 * the current value (which is then incremented).
2075 * - When a rule is modified, its 'modify_seqno' is set to the current
2076 * value (which is then incremented).
2078 * Thus, by comparing an old value of monitor_seqno against a rule's
2079 * 'add_seqno', one can tell whether the rule was added before or after the old
2080 * value was read, and similarly for 'modify_seqno'.
2082 * 32 bits should normally be sufficient (and would be nice, to save space in
2083 * each rule) but then we'd have to have some special cases for wraparound.
2085 * We initialize monitor_seqno to 1 to allow 0 to be used as an invalid
2087 static uint64_t monitor_seqno = 1;
2089 COVERAGE_DEFINE(ofmonitor_pause);
2090 COVERAGE_DEFINE(ofmonitor_resume);
2093 ofmonitor_create(const struct ofputil_flow_monitor_request *request,
2094 struct ofconn *ofconn, struct ofmonitor **monitorp)
2095 OVS_REQUIRES(ofproto_mutex)
2097 struct ofmonitor *m;
2101 m = ofmonitor_lookup(ofconn, request->id);
2103 return OFPERR_OFPMOFC_MONITOR_EXISTS;
2106 m = xmalloc(sizeof *m);
2108 hmap_insert(&ofconn->monitors, &m->ofconn_node, hash_int(request->id, 0));
2109 m->id = request->id;
2110 m->flags = request->flags;
2111 m->out_port = request->out_port;
2112 m->table_id = request->table_id;
2113 minimatch_init(&m->match, &request->match);
2120 ofmonitor_lookup(struct ofconn *ofconn, uint32_t id)
2121 OVS_REQUIRES(ofproto_mutex)
2123 struct ofmonitor *m;
2125 HMAP_FOR_EACH_IN_BUCKET (m, ofconn_node, hash_int(id, 0),
2126 &ofconn->monitors) {
2135 ofmonitor_destroy(struct ofmonitor *m)
2136 OVS_REQUIRES(ofproto_mutex)
2139 minimatch_destroy(&m->match);
2140 hmap_remove(&m->ofconn->monitors, &m->ofconn_node);
2146 ofmonitor_report(struct connmgr *mgr, struct rule *rule,
2147 enum nx_flow_update_event event,
2148 enum ofp_flow_removed_reason reason,
2149 const struct ofconn *abbrev_ofconn, ovs_be32 abbrev_xid,
2150 const struct rule_actions *old_actions)
2151 OVS_REQUIRES(ofproto_mutex)
2153 enum nx_flow_monitor_flags update;
2154 struct ofconn *ofconn;
2156 if (rule_is_hidden(rule)) {
2163 rule->add_seqno = rule->modify_seqno = monitor_seqno++;
2167 update = NXFMF_DELETE;
2170 case NXFME_MODIFIED:
2171 update = NXFMF_MODIFY;
2172 rule->modify_seqno = monitor_seqno++;
2180 LIST_FOR_EACH (ofconn, node, &mgr->all_conns) {
2181 enum nx_flow_monitor_flags flags = 0;
2182 struct ofmonitor *m;
2184 if (ofconn->monitor_paused) {
2185 /* Only send NXFME_DELETED notifications for flows that were added
2186 * before we paused. */
2187 if (event != NXFME_DELETED
2188 || rule->add_seqno > ofconn->monitor_paused) {
2193 HMAP_FOR_EACH (m, ofconn_node, &ofconn->monitors) {
2194 if (m->flags & update
2195 && (m->table_id == 0xff || m->table_id == rule->table_id)
2196 && (ofproto_rule_has_out_port(rule, m->out_port)
2198 && ofpacts_output_to_port(old_actions->ofpacts,
2199 old_actions->ofpacts_len,
2201 && cls_rule_is_loose_match(&rule->cr, &m->match)) {
2207 if (list_is_empty(&ofconn->updates)) {
2208 ofputil_start_flow_update(&ofconn->updates);
2209 ofconn->sent_abbrev_update = false;
2212 if (flags & NXFMF_OWN || ofconn != abbrev_ofconn
2213 || ofconn->monitor_paused) {
2214 struct ofputil_flow_update fu;
2218 fu.reason = event == NXFME_DELETED ? reason : 0;
2219 fu.table_id = rule->table_id;
2220 fu.cookie = rule->flow_cookie;
2221 minimatch_expand(&rule->cr.match, &match);
2223 fu.priority = rule->cr.priority;
2225 ovs_mutex_lock(&rule->mutex);
2226 fu.idle_timeout = rule->idle_timeout;
2227 fu.hard_timeout = rule->hard_timeout;
2228 ovs_mutex_unlock(&rule->mutex);
2230 if (flags & NXFMF_ACTIONS) {
2231 const struct rule_actions *actions = rule_get_actions(rule);
2232 fu.ofpacts = actions->ofpacts;
2233 fu.ofpacts_len = actions->ofpacts_len;
2238 ofputil_append_flow_update(&fu, &ofconn->updates);
2239 } else if (!ofconn->sent_abbrev_update) {
2240 struct ofputil_flow_update fu;
2242 fu.event = NXFME_ABBREV;
2243 fu.xid = abbrev_xid;
2244 ofputil_append_flow_update(&fu, &ofconn->updates);
2246 ofconn->sent_abbrev_update = true;
2253 ofmonitor_flush(struct connmgr *mgr)
2254 OVS_REQUIRES(ofproto_mutex)
2256 struct ofconn *ofconn;
2258 LIST_FOR_EACH (ofconn, node, &mgr->all_conns) {
2259 struct ofpbuf *msg, *next;
2261 LIST_FOR_EACH_SAFE (msg, next, list_node, &ofconn->updates) {
2262 unsigned int n_bytes;
2264 list_remove(&msg->list_node);
2265 ofconn_send(ofconn, msg, ofconn->monitor_counter);
2266 n_bytes = rconn_packet_counter_n_bytes(ofconn->monitor_counter);
2267 if (!ofconn->monitor_paused && n_bytes > 128 * 1024) {
2268 struct ofpbuf *pause;
2270 COVERAGE_INC(ofmonitor_pause);
2271 ofconn->monitor_paused = monitor_seqno++;
2272 pause = ofpraw_alloc_xid(OFPRAW_NXT_FLOW_MONITOR_PAUSED,
2273 OFP10_VERSION, htonl(0), 0);
2274 ofconn_send(ofconn, pause, ofconn->monitor_counter);
2281 ofmonitor_resume(struct ofconn *ofconn)
2282 OVS_REQUIRES(ofproto_mutex)
2284 struct rule_collection rules;
2285 struct ofpbuf *resumed;
2286 struct ofmonitor *m;
2287 struct ovs_list msgs;
2289 rule_collection_init(&rules);
2290 HMAP_FOR_EACH (m, ofconn_node, &ofconn->monitors) {
2291 ofmonitor_collect_resume_rules(m, ofconn->monitor_paused, &rules);
2295 ofmonitor_compose_refresh_updates(&rules, &msgs);
2297 resumed = ofpraw_alloc_xid(OFPRAW_NXT_FLOW_MONITOR_RESUMED, OFP10_VERSION,
2299 list_push_back(&msgs, &resumed->list_node);
2300 ofconn_send_replies(ofconn, &msgs);
2302 ofconn->monitor_paused = 0;
2306 ofmonitor_may_resume(const struct ofconn *ofconn)
2307 OVS_REQUIRES(ofproto_mutex)
2309 return (ofconn->monitor_paused != 0
2310 && !rconn_packet_counter_n_packets(ofconn->monitor_counter));
2314 ofmonitor_run(struct connmgr *mgr)
2316 struct ofconn *ofconn;
2318 ovs_mutex_lock(&ofproto_mutex);
2319 LIST_FOR_EACH (ofconn, node, &mgr->all_conns) {
2320 if (ofmonitor_may_resume(ofconn)) {
2321 COVERAGE_INC(ofmonitor_resume);
2322 ofmonitor_resume(ofconn);
2325 ovs_mutex_unlock(&ofproto_mutex);
2329 ofmonitor_wait(struct connmgr *mgr)
2331 struct ofconn *ofconn;
2333 ovs_mutex_lock(&ofproto_mutex);
2334 LIST_FOR_EACH (ofconn, node, &mgr->all_conns) {
2335 if (ofmonitor_may_resume(ofconn)) {
2336 poll_immediate_wake();
2339 ovs_mutex_unlock(&ofproto_mutex);