2 * Copyright (c) 2009, 2010, 2011, 2012 Nicira Networks.
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 "fail-open.h"
30 #include "ofproto-provider.h"
32 #include "poll-loop.h"
41 VLOG_DEFINE_THIS_MODULE(connmgr);
42 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
44 /* An OpenFlow connection. */
46 /* Configuration that persists from one connection to the next. */
48 struct list node; /* In struct connmgr's "all_conns" list. */
49 struct hmap_node hmap_node; /* In struct connmgr's "controllers" map. */
51 struct connmgr *connmgr; /* Connection's manager. */
52 struct rconn *rconn; /* OpenFlow connection. */
53 enum ofconn_type type; /* Type. */
54 enum ofproto_band band; /* In-band or out-of-band? */
55 bool enable_async_msgs; /* Initially enable async messages? */
57 /* State that should be cleared from one connection to the next. */
60 enum nx_role role; /* Role. */
61 enum ofputil_protocol protocol; /* Current protocol variant. */
62 enum nx_packet_in_format packet_in_format; /* OFPT_PACKET_IN format. */
64 /* Asynchronous flow table operation support. */
65 struct list opgroups; /* Contains pending "ofopgroups", if any. */
66 struct ofpbuf *blocked; /* Postponed OpenFlow message, if any. */
67 bool retry; /* True if 'blocked' is ready to try again. */
69 /* OFPT_PACKET_IN related data. */
70 struct rconn_packet_counter *packet_in_counter; /* # queued on 'rconn'. */
71 #define N_SCHEDULERS 2
72 struct pinsched *schedulers[N_SCHEDULERS];
73 struct pktbuf *pktbuf; /* OpenFlow packet buffers. */
74 int miss_send_len; /* Bytes to send of buffered packets. */
75 uint16_t controller_id; /* Connection controller ID. */
77 /* Number of OpenFlow messages queued on 'rconn' as replies to OpenFlow
78 * requests, and the maximum number before we stop reading OpenFlow
80 #define OFCONN_REPLY_MAX 100
81 struct rconn_packet_counter *reply_counter;
83 /* Asynchronous message configuration in each possible roles.
85 * A 1-bit enables sending an asynchronous message for one possible reason
86 * that the message might be generated, a 0-bit disables it. */
87 uint32_t master_async_config[OAM_N_TYPES]; /* master, other */
88 uint32_t slave_async_config[OAM_N_TYPES]; /* slave */
91 static struct ofconn *ofconn_create(struct connmgr *, struct rconn *,
92 enum ofconn_type, bool enable_async_msgs);
93 static void ofconn_destroy(struct ofconn *);
94 static void ofconn_flush(struct ofconn *);
96 static void ofconn_reconfigure(struct ofconn *,
97 const struct ofproto_controller *);
99 static void ofconn_run(struct ofconn *,
100 bool (*handle_openflow)(struct ofconn *,
101 struct ofpbuf *ofp_msg));
102 static void ofconn_wait(struct ofconn *, bool handling_openflow);
104 static const char *ofconn_get_target(const struct ofconn *);
105 static char *ofconn_make_name(const struct connmgr *, const char *target);
107 static void ofconn_set_rate_limit(struct ofconn *, int rate, int burst);
109 static void ofconn_send(const struct ofconn *, struct ofpbuf *,
110 struct rconn_packet_counter *);
112 static void do_send_packet_in(struct ofpbuf *, void *ofconn_);
114 /* A listener for incoming OpenFlow "service" connections. */
116 struct hmap_node node; /* In struct connmgr's "services" hmap. */
117 struct pvconn *pvconn; /* OpenFlow connection listener. */
119 /* These are not used by ofservice directly. They are settings for
120 * accepted "struct ofconn"s from the pvconn. */
121 int probe_interval; /* Max idle time before probing, in seconds. */
122 int rate_limit; /* Max packet-in rate in packets per second. */
123 int burst_limit; /* Limit on accumulating packet credits. */
124 bool enable_async_msgs; /* Initially enable async messages? */
125 uint8_t dscp; /* DSCP Value for controller connection */
128 static void ofservice_reconfigure(struct ofservice *,
129 const struct ofproto_controller *);
130 static int ofservice_create(struct connmgr *, const char *target, uint8_t dscp);
131 static void ofservice_destroy(struct connmgr *, struct ofservice *);
132 static struct ofservice *ofservice_lookup(struct connmgr *,
135 /* Connection manager for an OpenFlow switch. */
137 struct ofproto *ofproto;
139 char *local_port_name;
141 /* OpenFlow connections. */
142 struct hmap controllers; /* Controller "struct ofconn"s. */
143 struct list all_conns; /* Contains "struct ofconn"s. */
145 /* OpenFlow listeners. */
146 struct hmap services; /* Contains "struct ofservice"s. */
147 struct pvconn **snoops;
151 struct fail_open *fail_open;
152 enum ofproto_fail_mode fail_mode;
154 /* In-band control. */
155 struct in_band *in_band;
156 struct sockaddr_in *extra_in_band_remotes;
157 size_t n_extra_remotes;
161 static void update_in_band_remotes(struct connmgr *);
162 static void add_snooper(struct connmgr *, struct vconn *);
164 /* Creates and returns a new connection manager owned by 'ofproto'. 'name' is
165 * a name for the ofproto suitable for using in log messages.
166 * 'local_port_name' is the name of the local port (OFPP_LOCAL) within
169 connmgr_create(struct ofproto *ofproto,
170 const char *name, const char *local_port_name)
174 mgr = xmalloc(sizeof *mgr);
175 mgr->ofproto = ofproto;
176 mgr->name = xstrdup(name);
177 mgr->local_port_name = xstrdup(local_port_name);
179 hmap_init(&mgr->controllers);
180 list_init(&mgr->all_conns);
182 hmap_init(&mgr->services);
186 mgr->fail_open = NULL;
187 mgr->fail_mode = OFPROTO_FAIL_SECURE;
190 mgr->extra_in_band_remotes = NULL;
191 mgr->n_extra_remotes = 0;
192 mgr->in_band_queue = -1;
197 /* Frees 'mgr' and all of its resources. */
199 connmgr_destroy(struct connmgr *mgr)
201 struct ofservice *ofservice, *next_ofservice;
202 struct ofconn *ofconn, *next_ofconn;
209 LIST_FOR_EACH_SAFE (ofconn, next_ofconn, node, &mgr->all_conns) {
210 ofconn_destroy(ofconn);
212 hmap_destroy(&mgr->controllers);
214 HMAP_FOR_EACH_SAFE (ofservice, next_ofservice, node, &mgr->services) {
215 ofservice_destroy(mgr, ofservice);
217 hmap_destroy(&mgr->services);
219 for (i = 0; i < mgr->n_snoops; i++) {
220 pvconn_close(mgr->snoops[i]);
224 fail_open_destroy(mgr->fail_open);
225 mgr->fail_open = NULL;
227 in_band_destroy(mgr->in_band);
229 free(mgr->extra_in_band_remotes);
231 free(mgr->local_port_name);
236 /* Does all of the periodic maintenance required by 'mgr'.
238 * If 'handle_openflow' is nonnull, calls 'handle_openflow' for each message
239 * received on an OpenFlow connection, passing along the OpenFlow connection
240 * itself and the message that was sent. If 'handle_openflow' returns true,
241 * the message is considered to be fully processed. If 'handle_openflow'
242 * returns false, the message is considered not to have been processed at all;
243 * it will be stored and re-presented to 'handle_openflow' following the next
244 * call to connmgr_retry(). 'handle_openflow' must not modify or free the
247 * If 'handle_openflow' is NULL, no OpenFlow messages will be processed and
248 * other activities that could affect the flow table (in-band processing,
249 * fail-open processing) are suppressed too. */
251 connmgr_run(struct connmgr *mgr,
252 bool (*handle_openflow)(struct ofconn *, struct ofpbuf *ofp_msg))
254 struct ofconn *ofconn, *next_ofconn;
255 struct ofservice *ofservice;
258 if (handle_openflow && mgr->in_band) {
259 if (!in_band_run(mgr->in_band)) {
260 in_band_destroy(mgr->in_band);
265 LIST_FOR_EACH_SAFE (ofconn, next_ofconn, node, &mgr->all_conns) {
266 ofconn_run(ofconn, handle_openflow);
269 /* Fail-open maintenance. Do this after processing the ofconns since
270 * fail-open checks the status of the controller rconn. */
271 if (handle_openflow && mgr->fail_open) {
272 fail_open_run(mgr->fail_open);
275 HMAP_FOR_EACH (ofservice, node, &mgr->services) {
279 retval = pvconn_accept(ofservice->pvconn, OFP10_VERSION, &vconn);
284 /* Passing default value for creation of the rconn */
285 rconn = rconn_create(ofservice->probe_interval, 0, ofservice->dscp);
286 name = ofconn_make_name(mgr, vconn_get_name(vconn));
287 rconn_connect_unreliably(rconn, vconn, name);
290 ofconn = ofconn_create(mgr, rconn, OFCONN_SERVICE,
291 ofservice->enable_async_msgs);
292 ofconn_set_rate_limit(ofconn, ofservice->rate_limit,
293 ofservice->burst_limit);
294 } else if (retval != EAGAIN) {
295 VLOG_WARN_RL(&rl, "accept failed (%s)", strerror(retval));
299 for (i = 0; i < mgr->n_snoops; i++) {
303 retval = pvconn_accept(mgr->snoops[i], OFP10_VERSION, &vconn);
305 add_snooper(mgr, vconn);
306 } else if (retval != EAGAIN) {
307 VLOG_WARN_RL(&rl, "accept failed (%s)", strerror(retval));
312 /* Causes the poll loop to wake up when connmgr_run() needs to run.
314 * If 'handling_openflow' is true, arriving OpenFlow messages and other
315 * activities that affect the flow table will wake up the poll loop. If
316 * 'handling_openflow' is false, they will not. */
318 connmgr_wait(struct connmgr *mgr, bool handling_openflow)
320 struct ofservice *ofservice;
321 struct ofconn *ofconn;
324 LIST_FOR_EACH (ofconn, node, &mgr->all_conns) {
325 ofconn_wait(ofconn, handling_openflow);
327 if (handling_openflow && mgr->in_band) {
328 in_band_wait(mgr->in_band);
330 if (handling_openflow && mgr->fail_open) {
331 fail_open_wait(mgr->fail_open);
333 HMAP_FOR_EACH (ofservice, node, &mgr->services) {
334 pvconn_wait(ofservice->pvconn);
336 for (i = 0; i < mgr->n_snoops; i++) {
337 pvconn_wait(mgr->snoops[i]);
341 /* Returns the ofproto that owns 'ofconn''s connmgr. */
343 ofconn_get_ofproto(const struct ofconn *ofconn)
345 return ofconn->connmgr->ofproto;
348 /* If processing of OpenFlow messages was blocked on any 'mgr' ofconns by
349 * returning false to the 'handle_openflow' callback to connmgr_run(), this
350 * re-enables them. */
352 connmgr_retry(struct connmgr *mgr)
354 struct ofconn *ofconn;
356 LIST_FOR_EACH (ofconn, node, &mgr->all_conns) {
357 ofconn->retry = true;
361 /* OpenFlow configuration. */
363 static void add_controller(struct connmgr *, const char *target, uint8_t dscp);
364 static struct ofconn *find_controller_by_target(struct connmgr *,
366 static void update_fail_open(struct connmgr *);
367 static int set_pvconns(struct pvconn ***pvconnsp, size_t *n_pvconnsp,
368 const struct sset *);
370 /* Returns true if 'mgr' has any configured primary controllers.
372 * Service controllers do not count, but configured primary controllers do
373 * count whether or not they are currently connected. */
375 connmgr_has_controllers(const struct connmgr *mgr)
377 return !hmap_is_empty(&mgr->controllers);
380 /* Initializes 'info' and populates it with information about each configured
381 * primary controller. The keys in 'info' are the controllers' targets; the
382 * data values are corresponding "struct ofproto_controller_info".
384 * The caller owns 'info' and everything in it and should free it when it is no
387 connmgr_get_controller_info(struct connmgr *mgr, struct shash *info)
389 const struct ofconn *ofconn;
391 HMAP_FOR_EACH (ofconn, hmap_node, &mgr->controllers) {
392 const struct rconn *rconn = ofconn->rconn;
393 const char *target = rconn_get_target(rconn);
395 if (!shash_find(info, target)) {
396 struct ofproto_controller_info *cinfo = xmalloc(sizeof *cinfo);
397 time_t now = time_now();
398 time_t last_connection = rconn_get_last_connection(rconn);
399 time_t last_disconnect = rconn_get_last_disconnect(rconn);
400 int last_error = rconn_get_last_error(rconn);
402 shash_add(info, target, cinfo);
404 cinfo->is_connected = rconn_is_connected(rconn);
405 cinfo->role = ofconn->role;
410 cinfo->pairs.keys[cinfo->pairs.n] = "last_error";
411 cinfo->pairs.values[cinfo->pairs.n++]
412 = xstrdup(ovs_retval_to_string(last_error));
415 cinfo->pairs.keys[cinfo->pairs.n] = "state";
416 cinfo->pairs.values[cinfo->pairs.n++]
417 = xstrdup(rconn_get_state(rconn));
419 if (last_connection != TIME_MIN) {
420 cinfo->pairs.keys[cinfo->pairs.n] = "sec_since_connect";
421 cinfo->pairs.values[cinfo->pairs.n++]
422 = xasprintf("%ld", (long int) (now - last_connection));
425 if (last_disconnect != TIME_MIN) {
426 cinfo->pairs.keys[cinfo->pairs.n] = "sec_since_disconnect";
427 cinfo->pairs.values[cinfo->pairs.n++]
428 = xasprintf("%ld", (long int) (now - last_disconnect));
435 connmgr_free_controller_info(struct shash *info)
437 struct shash_node *node;
439 SHASH_FOR_EACH (node, info) {
440 struct ofproto_controller_info *cinfo = node->data;
441 while (cinfo->pairs.n) {
442 free((char *) cinfo->pairs.values[--cinfo->pairs.n]);
449 /* Changes 'mgr''s set of controllers to the 'n_controllers' controllers in
452 connmgr_set_controllers(struct connmgr *mgr,
453 const struct ofproto_controller *controllers,
454 size_t n_controllers)
456 bool had_controllers = connmgr_has_controllers(mgr);
457 struct shash new_controllers;
458 struct ofconn *ofconn, *next_ofconn;
459 struct ofservice *ofservice, *next_ofservice;
462 /* Create newly configured controllers and services.
463 * Create a name to ofproto_controller mapping in 'new_controllers'. */
464 shash_init(&new_controllers);
465 for (i = 0; i < n_controllers; i++) {
466 const struct ofproto_controller *c = &controllers[i];
468 if (!vconn_verify_name(c->target)) {
469 if (!find_controller_by_target(mgr, c->target)) {
470 add_controller(mgr, c->target, c->dscp);
472 } else if (!pvconn_verify_name(c->target)) {
473 if (!ofservice_lookup(mgr, c->target)) {
474 ofservice_create(mgr, c->target, c->dscp);
477 VLOG_WARN_RL(&rl, "%s: unsupported controller \"%s\"",
478 mgr->name, c->target);
482 shash_add_once(&new_controllers, c->target, &controllers[i]);
485 /* Delete controllers that are no longer configured.
486 * Update configuration of all now-existing controllers. */
487 HMAP_FOR_EACH_SAFE (ofconn, next_ofconn, hmap_node, &mgr->controllers) {
488 struct ofproto_controller *c;
490 c = shash_find_data(&new_controllers, ofconn_get_target(ofconn));
492 ofconn_destroy(ofconn);
494 ofconn_reconfigure(ofconn, c);
498 /* Delete services that are no longer configured.
499 * Update configuration of all now-existing services. */
500 HMAP_FOR_EACH_SAFE (ofservice, next_ofservice, node, &mgr->services) {
501 struct ofproto_controller *c;
503 c = shash_find_data(&new_controllers,
504 pvconn_get_name(ofservice->pvconn));
506 ofservice_destroy(mgr, ofservice);
508 ofservice_reconfigure(ofservice, c);
512 shash_destroy(&new_controllers);
514 update_in_band_remotes(mgr);
515 update_fail_open(mgr);
516 if (had_controllers != connmgr_has_controllers(mgr)) {
517 ofproto_flush_flows(mgr->ofproto);
521 /* Drops the connections between 'mgr' and all of its primary and secondary
522 * controllers, forcing them to reconnect. */
524 connmgr_reconnect(const struct connmgr *mgr)
526 struct ofconn *ofconn;
528 LIST_FOR_EACH (ofconn, node, &mgr->all_conns) {
529 rconn_reconnect(ofconn->rconn);
533 /* Sets the "snoops" for 'mgr' to the pvconn targets listed in 'snoops'.
535 * A "snoop" is a pvconn to which every OpenFlow message to or from the most
536 * important controller on 'mgr' is mirrored. */
538 connmgr_set_snoops(struct connmgr *mgr, const struct sset *snoops)
540 return set_pvconns(&mgr->snoops, &mgr->n_snoops, snoops);
543 /* Adds each of the snoops currently configured on 'mgr' to 'snoops'. */
545 connmgr_get_snoops(const struct connmgr *mgr, struct sset *snoops)
549 for (i = 0; i < mgr->n_snoops; i++) {
550 sset_add(snoops, pvconn_get_name(mgr->snoops[i]));
554 /* Returns true if 'mgr' has at least one snoop, false if it has none. */
556 connmgr_has_snoops(const struct connmgr *mgr)
558 return mgr->n_snoops > 0;
561 /* Creates a new controller for 'target' in 'mgr'. update_controller() needs
562 * to be called later to finish the new ofconn's configuration. */
564 add_controller(struct connmgr *mgr, const char *target, uint8_t dscp)
566 char *name = ofconn_make_name(mgr, target);
567 struct ofconn *ofconn;
569 ofconn = ofconn_create(mgr, rconn_create(5, 8, dscp), OFCONN_PRIMARY, true);
570 ofconn->pktbuf = pktbuf_create();
571 rconn_connect(ofconn->rconn, target, name);
572 hmap_insert(&mgr->controllers, &ofconn->hmap_node, hash_string(target, 0));
577 static struct ofconn *
578 find_controller_by_target(struct connmgr *mgr, const char *target)
580 struct ofconn *ofconn;
582 HMAP_FOR_EACH_WITH_HASH (ofconn, hmap_node,
583 hash_string(target, 0), &mgr->controllers) {
584 if (!strcmp(ofconn_get_target(ofconn), target)) {
592 update_in_band_remotes(struct connmgr *mgr)
594 struct sockaddr_in *addrs;
595 size_t max_addrs, n_addrs;
596 struct ofconn *ofconn;
599 /* Allocate enough memory for as many remotes as we could possibly have. */
600 max_addrs = mgr->n_extra_remotes + hmap_count(&mgr->controllers);
601 addrs = xmalloc(max_addrs * sizeof *addrs);
604 /* Add all the remotes. */
605 HMAP_FOR_EACH (ofconn, hmap_node, &mgr->controllers) {
606 struct sockaddr_in *sin = &addrs[n_addrs];
607 const char *target = rconn_get_target(ofconn->rconn);
609 if (ofconn->band == OFPROTO_OUT_OF_BAND) {
613 if (stream_parse_target_with_default_ports(target,
620 for (i = 0; i < mgr->n_extra_remotes; i++) {
621 addrs[n_addrs++] = mgr->extra_in_band_remotes[i];
624 /* Create or update or destroy in-band. */
627 in_band_create(mgr->ofproto, mgr->local_port_name, &mgr->in_band);
629 in_band_set_queue(mgr->in_band, mgr->in_band_queue);
631 /* in_band_run() needs a chance to delete any existing in-band flows.
632 * We will destroy mgr->in_band after it's done with that. */
635 in_band_set_remotes(mgr->in_band, addrs, n_addrs);
643 update_fail_open(struct connmgr *mgr)
645 if (connmgr_has_controllers(mgr)
646 && mgr->fail_mode == OFPROTO_FAIL_STANDALONE) {
647 if (!mgr->fail_open) {
648 mgr->fail_open = fail_open_create(mgr->ofproto, mgr);
651 fail_open_destroy(mgr->fail_open);
652 mgr->fail_open = NULL;
657 set_pvconns(struct pvconn ***pvconnsp, size_t *n_pvconnsp,
658 const struct sset *sset)
660 struct pvconn **pvconns = *pvconnsp;
661 size_t n_pvconns = *n_pvconnsp;
666 for (i = 0; i < n_pvconns; i++) {
667 pvconn_close(pvconns[i]);
671 pvconns = xmalloc(sset_count(sset) * sizeof *pvconns);
673 SSET_FOR_EACH (name, sset) {
674 struct pvconn *pvconn;
677 error = pvconn_open(name, &pvconn, DSCP_INVALID);
679 pvconns[n_pvconns++] = pvconn;
681 VLOG_ERR("failed to listen on %s: %s", name, strerror(error));
689 *n_pvconnsp = n_pvconns;
694 /* Returns a "preference level" for snooping 'ofconn'. A higher return value
695 * means that 'ofconn' is more interesting for monitoring than a lower return
698 snoop_preference(const struct ofconn *ofconn)
700 switch (ofconn->role) {
708 /* Shouldn't happen. */
713 /* One of 'mgr''s "snoop" pvconns has accepted a new connection on 'vconn'.
714 * Connects this vconn to a controller. */
716 add_snooper(struct connmgr *mgr, struct vconn *vconn)
718 struct ofconn *ofconn, *best;
720 /* Pick a controller for monitoring. */
722 LIST_FOR_EACH (ofconn, node, &mgr->all_conns) {
723 if (ofconn->type == OFCONN_PRIMARY
724 && (!best || snoop_preference(ofconn) > snoop_preference(best))) {
730 rconn_add_monitor(best->rconn, vconn);
732 VLOG_INFO_RL(&rl, "no controller connection to snoop");
737 /* Public ofconn functions. */
739 /* Returns the connection type, either OFCONN_PRIMARY or OFCONN_SERVICE. */
741 ofconn_get_type(const struct ofconn *ofconn)
746 /* Returns the role configured for 'ofconn'.
748 * The default role, if no other role has been set, is NX_ROLE_OTHER. */
750 ofconn_get_role(const struct ofconn *ofconn)
755 /* Changes 'ofconn''s role to 'role'. If 'role' is NX_ROLE_MASTER then any
756 * existing master is demoted to a slave. */
758 ofconn_set_role(struct ofconn *ofconn, enum nx_role role)
760 if (role == NX_ROLE_MASTER) {
761 struct ofconn *other;
763 HMAP_FOR_EACH (other, hmap_node, &ofconn->connmgr->controllers) {
764 if (other->role == NX_ROLE_MASTER) {
765 other->role = NX_ROLE_SLAVE;
773 ofconn_set_invalid_ttl_to_controller(struct ofconn *ofconn, bool enable)
775 uint32_t bit = 1u << OFPR_INVALID_TTL;
777 ofconn->master_async_config[OAM_PACKET_IN] |= bit;
779 ofconn->master_async_config[OAM_PACKET_IN] &= ~bit;
784 ofconn_get_invalid_ttl_to_controller(struct ofconn *ofconn)
786 uint32_t bit = 1u << OFPR_INVALID_TTL;
787 return (ofconn->master_async_config[OAM_PACKET_IN] & bit) != 0;
790 /* Returns the currently configured protocol for 'ofconn', one of OFPUTIL_P_*.
792 * The default, if no other format has been set, is OFPUTIL_P_OPENFLOW10. */
793 enum ofputil_protocol
794 ofconn_get_protocol(struct ofconn *ofconn)
796 return ofconn->protocol;
799 /* Sets the protocol for 'ofconn' to 'protocol' (one of OFPUTIL_P_*).
801 * (This doesn't actually send anything to accomplish this. Presumably the
802 * caller already did that.) */
804 ofconn_set_protocol(struct ofconn *ofconn, enum ofputil_protocol protocol)
806 ofconn->protocol = protocol;
809 /* Returns the currently configured packet in format for 'ofconn', one of
812 * The default, if no other format has been set, is NXPIF_OPENFLOW10. */
813 enum nx_packet_in_format
814 ofconn_get_packet_in_format(struct ofconn *ofconn)
816 return ofconn->packet_in_format;
819 /* Sets the packet in format for 'ofconn' to 'packet_in_format' (one of
822 ofconn_set_packet_in_format(struct ofconn *ofconn,
823 enum nx_packet_in_format packet_in_format)
825 ofconn->packet_in_format = packet_in_format;
828 /* Sets the controller connection ID for 'ofconn' to 'controller_id'.
830 * The connection controller ID is used for OFPP_CONTROLLER and
831 * NXAST_CONTROLLER actions. See "struct nx_action_controller" for details. */
833 ofconn_set_controller_id(struct ofconn *ofconn, uint16_t controller_id)
835 ofconn->controller_id = controller_id;
838 /* Returns the default miss send length for 'ofconn'. */
840 ofconn_get_miss_send_len(const struct ofconn *ofconn)
842 return ofconn->miss_send_len;
845 /* Sets the default miss send length for 'ofconn' to 'miss_send_len'. */
847 ofconn_set_miss_send_len(struct ofconn *ofconn, int miss_send_len)
849 ofconn->miss_send_len = miss_send_len;
853 ofconn_set_async_config(struct ofconn *ofconn,
854 const uint32_t master_masks[OAM_N_TYPES],
855 const uint32_t slave_masks[OAM_N_TYPES])
857 size_t size = sizeof ofconn->master_async_config;
858 memcpy(ofconn->master_async_config, master_masks, size);
859 memcpy(ofconn->slave_async_config, slave_masks, size);
862 /* Sends 'msg' on 'ofconn', accounting it as a reply. (If there is a
863 * sufficient number of OpenFlow replies in-flight on a single ofconn, then the
864 * connmgr will stop accepting new OpenFlow requests on that ofconn until the
865 * controller has accepted some of the replies.) */
867 ofconn_send_reply(const struct ofconn *ofconn, struct ofpbuf *msg)
869 ofconn_send(ofconn, msg, ofconn->reply_counter);
872 /* Sends each of the messages in list 'replies' on 'ofconn' in order,
873 * accounting them as replies. */
875 ofconn_send_replies(const struct ofconn *ofconn, struct list *replies)
877 struct ofpbuf *reply, *next;
879 LIST_FOR_EACH_SAFE (reply, next, list_node, replies) {
880 list_remove(&reply->list_node);
881 ofconn_send_reply(ofconn, reply);
885 /* Sends 'error' on 'ofconn', as a reply to 'request'. Only at most the
886 * first 64 bytes of 'request' are used. */
888 ofconn_send_error(const struct ofconn *ofconn,
889 const struct ofp_header *request, enum ofperr error)
891 struct ofpbuf *reply;
893 reply = ofperr_encode_reply(error, request);
895 static struct vlog_rate_limit err_rl = VLOG_RATE_LIMIT_INIT(10, 10);
897 if (!VLOG_DROP_INFO(&err_rl)) {
898 const struct ofputil_msg_type *type;
899 const char *type_name;
902 request_len = ntohs(request->length);
903 type_name = (!ofputil_decode_msg_type_partial(request,
904 MIN(64, request_len),
906 ? ofputil_msg_type_name(type)
909 VLOG_INFO("%s: sending %s error reply to %s message",
910 rconn_get_name(ofconn->rconn), ofperr_to_string(error),
913 ofconn_send_reply(ofconn, reply);
917 /* Same as pktbuf_retrieve(), using the pktbuf owned by 'ofconn'. */
919 ofconn_pktbuf_retrieve(struct ofconn *ofconn, uint32_t id,
920 struct ofpbuf **bufferp, uint16_t *in_port)
922 return pktbuf_retrieve(ofconn->pktbuf, id, bufferp, in_port);
925 /* Returns true if 'ofconn' has any pending opgroups. */
927 ofconn_has_pending_opgroups(const struct ofconn *ofconn)
929 return !list_is_empty(&ofconn->opgroups);
932 /* Adds 'ofconn_node' to 'ofconn''s list of pending opgroups.
934 * If 'ofconn' is destroyed or its connection drops, then 'ofconn' will remove
935 * 'ofconn_node' from the list and re-initialize it with list_init(). The
936 * client may, therefore, use list_is_empty(ofconn_node) to determine whether
937 * 'ofconn_node' is still associated with an active ofconn.
939 * The client may also remove ofconn_node from the list itself, with
942 ofconn_add_opgroup(struct ofconn *ofconn, struct list *ofconn_node)
944 list_push_back(&ofconn->opgroups, ofconn_node);
947 /* Private ofconn functions. */
950 ofconn_get_target(const struct ofconn *ofconn)
952 return rconn_get_target(ofconn->rconn);
955 static struct ofconn *
956 ofconn_create(struct connmgr *mgr, struct rconn *rconn, enum ofconn_type type,
957 bool enable_async_msgs)
959 struct ofconn *ofconn;
961 ofconn = xzalloc(sizeof *ofconn);
962 ofconn->connmgr = mgr;
963 list_push_back(&mgr->all_conns, &ofconn->node);
964 ofconn->rconn = rconn;
966 ofconn->enable_async_msgs = enable_async_msgs;
968 list_init(&ofconn->opgroups);
970 ofconn_flush(ofconn);
975 /* Clears all of the state in 'ofconn' that should not persist from one
976 * connection to the next. */
978 ofconn_flush(struct ofconn *ofconn)
982 ofconn->role = NX_ROLE_OTHER;
983 ofconn->protocol = OFPUTIL_P_OF10;
984 ofconn->packet_in_format = NXPIF_OPENFLOW10;
986 /* Disassociate 'ofconn' from all of the ofopgroups that it initiated that
987 * have not yet completed. (Those ofopgroups will still run to completion
988 * in the usual way, but any errors that they run into will not be reported
989 * on any OpenFlow channel.)
991 * Also discard any blocked operation on 'ofconn'. */
992 while (!list_is_empty(&ofconn->opgroups)) {
993 list_init(list_pop_front(&ofconn->opgroups));
995 ofpbuf_delete(ofconn->blocked);
996 ofconn->blocked = NULL;
998 rconn_packet_counter_destroy(ofconn->packet_in_counter);
999 ofconn->packet_in_counter = rconn_packet_counter_create();
1000 for (i = 0; i < N_SCHEDULERS; i++) {
1001 if (ofconn->schedulers[i]) {
1004 pinsched_get_limits(ofconn->schedulers[i], &rate, &burst);
1005 pinsched_destroy(ofconn->schedulers[i]);
1006 ofconn->schedulers[i] = pinsched_create(rate, burst);
1009 if (ofconn->pktbuf) {
1010 pktbuf_destroy(ofconn->pktbuf);
1011 ofconn->pktbuf = pktbuf_create();
1013 ofconn->miss_send_len = (ofconn->type == OFCONN_PRIMARY
1014 ? OFP_DEFAULT_MISS_SEND_LEN
1016 ofconn->controller_id = 0;
1018 rconn_packet_counter_destroy(ofconn->reply_counter);
1019 ofconn->reply_counter = rconn_packet_counter_create();
1021 if (ofconn->enable_async_msgs) {
1022 uint32_t *master = ofconn->master_async_config;
1023 uint32_t *slave = ofconn->slave_async_config;
1025 /* "master" and "other" roles get all asynchronous messages by default,
1026 * except that the controller needs to enable nonstandard "packet-in"
1027 * reasons itself. */
1028 master[OAM_PACKET_IN] = (1u << OFPR_NO_MATCH) | (1u << OFPR_ACTION);
1029 master[OAM_PORT_STATUS] = ((1u << OFPPR_ADD)
1030 | (1u << OFPPR_DELETE)
1031 | (1u << OFPPR_MODIFY));
1032 master[OAM_FLOW_REMOVED] = ((1u << OFPRR_IDLE_TIMEOUT)
1033 | (1u << OFPRR_HARD_TIMEOUT)
1034 | (1u << OFPRR_DELETE));
1036 /* "slave" role gets port status updates by default. */
1037 slave[OAM_PACKET_IN] = 0;
1038 slave[OAM_PORT_STATUS] = ((1u << OFPPR_ADD)
1039 | (1u << OFPPR_DELETE)
1040 | (1u << OFPPR_MODIFY));
1041 slave[OAM_FLOW_REMOVED] = 0;
1043 memset(ofconn->master_async_config, 0,
1044 sizeof ofconn->master_async_config);
1045 memset(ofconn->slave_async_config, 0,
1046 sizeof ofconn->slave_async_config);
1051 ofconn_destroy(struct ofconn *ofconn)
1053 ofconn_flush(ofconn);
1055 if (ofconn->type == OFCONN_PRIMARY) {
1056 hmap_remove(&ofconn->connmgr->controllers, &ofconn->hmap_node);
1059 list_remove(&ofconn->node);
1060 rconn_destroy(ofconn->rconn);
1061 rconn_packet_counter_destroy(ofconn->packet_in_counter);
1062 rconn_packet_counter_destroy(ofconn->reply_counter);
1063 pktbuf_destroy(ofconn->pktbuf);
1067 /* Reconfigures 'ofconn' to match 'c'. 'ofconn' and 'c' must have the same
1070 ofconn_reconfigure(struct ofconn *ofconn, const struct ofproto_controller *c)
1074 ofconn->band = c->band;
1075 ofconn->enable_async_msgs = c->enable_async_msgs;
1077 rconn_set_max_backoff(ofconn->rconn, c->max_backoff);
1079 probe_interval = c->probe_interval ? MAX(c->probe_interval, 5) : 0;
1080 rconn_set_probe_interval(ofconn->rconn, probe_interval);
1082 ofconn_set_rate_limit(ofconn, c->rate_limit, c->burst_limit);
1085 /* Returns true if it makes sense for 'ofconn' to receive and process OpenFlow
1088 ofconn_may_recv(const struct ofconn *ofconn)
1090 int count = rconn_packet_counter_read (ofconn->reply_counter);
1091 return (!ofconn->blocked || ofconn->retry) && count < OFCONN_REPLY_MAX;
1095 ofconn_run(struct ofconn *ofconn,
1096 bool (*handle_openflow)(struct ofconn *, struct ofpbuf *ofp_msg))
1098 struct connmgr *mgr = ofconn->connmgr;
1101 for (i = 0; i < N_SCHEDULERS; i++) {
1102 pinsched_run(ofconn->schedulers[i], do_send_packet_in, ofconn);
1105 rconn_run(ofconn->rconn);
1107 if (handle_openflow) {
1108 /* Limit the number of iterations to avoid starving other tasks. */
1109 for (i = 0; i < 50 && ofconn_may_recv(ofconn); i++) {
1110 struct ofpbuf *of_msg;
1112 of_msg = (ofconn->blocked
1114 : rconn_recv(ofconn->rconn));
1118 if (mgr->fail_open) {
1119 fail_open_maybe_recover(mgr->fail_open);
1122 if (handle_openflow(ofconn, of_msg)) {
1123 ofpbuf_delete(of_msg);
1124 ofconn->blocked = NULL;
1126 ofconn->blocked = of_msg;
1127 ofconn->retry = false;
1132 if (!rconn_is_alive(ofconn->rconn)) {
1133 ofconn_destroy(ofconn);
1134 } else if (!rconn_is_connected(ofconn->rconn)) {
1135 ofconn_flush(ofconn);
1140 ofconn_wait(struct ofconn *ofconn, bool handling_openflow)
1144 for (i = 0; i < N_SCHEDULERS; i++) {
1145 pinsched_wait(ofconn->schedulers[i]);
1147 rconn_run_wait(ofconn->rconn);
1148 if (handling_openflow && ofconn_may_recv(ofconn)) {
1149 rconn_recv_wait(ofconn->rconn);
1153 /* Returns true if 'ofconn' should receive asynchronous messages of the given
1154 * OAM_* 'type' and 'reason', which should be a OFPR_* value for OAM_PACKET_IN,
1155 * a OFPPR_* value for OAM_PORT_STATUS, or an OFPRR_* value for
1156 * OAM_FLOW_REMOVED. Returns false if the message should not be sent on
1159 ofconn_receives_async_msg(const struct ofconn *ofconn,
1160 enum ofconn_async_msg_type type,
1161 unsigned int reason)
1163 const uint32_t *async_config;
1165 assert(reason < 32);
1166 assert((unsigned int) type < OAM_N_TYPES);
1168 if (!rconn_is_connected(ofconn->rconn)) {
1172 /* Keep the following code in sync with the documentation in the
1173 * "Asynchronous Messages" section in DESIGN. */
1175 if (ofconn->type == OFCONN_SERVICE && !ofconn->miss_send_len) {
1176 /* Service connections don't get asynchronous messages unless they have
1177 * explicitly asked for them by setting a nonzero miss send length. */
1181 async_config = (ofconn->role == NX_ROLE_SLAVE
1182 ? ofconn->slave_async_config
1183 : ofconn->master_async_config);
1184 if (!(async_config[type] & (1u << reason))) {
1191 /* Returns a human-readable name for an OpenFlow connection between 'mgr' and
1192 * 'target', suitable for use in log messages for identifying the connection.
1194 * The name is dynamically allocated. The caller should free it (with free())
1195 * when it is no longer needed. */
1197 ofconn_make_name(const struct connmgr *mgr, const char *target)
1199 return xasprintf("%s<->%s", mgr->name, target);
1203 ofconn_set_rate_limit(struct ofconn *ofconn, int rate, int burst)
1207 for (i = 0; i < N_SCHEDULERS; i++) {
1208 struct pinsched **s = &ofconn->schedulers[i];
1212 *s = pinsched_create(rate, burst);
1214 pinsched_set_limits(*s, rate, burst);
1217 pinsched_destroy(*s);
1224 ofconn_send(const struct ofconn *ofconn, struct ofpbuf *msg,
1225 struct rconn_packet_counter *counter)
1227 update_openflow_length(msg);
1228 if (rconn_send(ofconn->rconn, msg, counter)) {
1233 /* Sending asynchronous messages. */
1235 static void schedule_packet_in(struct ofconn *, struct ofputil_packet_in);
1237 /* Sends an OFPT_PORT_STATUS message with 'opp' and 'reason' to appropriate
1238 * controllers managed by 'mgr'. */
1240 connmgr_send_port_status(struct connmgr *mgr,
1241 const struct ofputil_phy_port *pp, uint8_t reason)
1243 /* XXX Should limit the number of queued port status change messages. */
1244 struct ofputil_port_status ps;
1245 struct ofconn *ofconn;
1249 LIST_FOR_EACH (ofconn, node, &mgr->all_conns) {
1250 if (ofconn_receives_async_msg(ofconn, OAM_PORT_STATUS, reason)) {
1253 msg = ofputil_encode_port_status(&ps, ofconn->protocol);
1254 ofconn_send(ofconn, msg, NULL);
1259 /* Sends an OFPT_FLOW_REMOVED or NXT_FLOW_REMOVED message based on 'fr' to
1260 * appropriate controllers managed by 'mgr'. */
1262 connmgr_send_flow_removed(struct connmgr *mgr,
1263 const struct ofputil_flow_removed *fr)
1265 struct ofconn *ofconn;
1267 LIST_FOR_EACH (ofconn, node, &mgr->all_conns) {
1268 if (ofconn_receives_async_msg(ofconn, OAM_FLOW_REMOVED, fr->reason)) {
1271 /* Account flow expirations as replies to OpenFlow requests. That
1272 * works because preventing OpenFlow requests from being processed
1273 * also prevents new flows from being added (and expiring). (It
1274 * also prevents processing OpenFlow requests that would not add
1275 * new flows, so it is imperfect.) */
1276 msg = ofputil_encode_flow_removed(fr, ofconn->protocol);
1277 ofconn_send_reply(ofconn, msg);
1282 /* Given 'pin', sends an OFPT_PACKET_IN message to each OpenFlow controller as
1283 * necessary according to their individual configurations.
1285 * The caller doesn't need to fill in pin->buffer_id or pin->total_len. */
1287 connmgr_send_packet_in(struct connmgr *mgr,
1288 const struct ofputil_packet_in *pin)
1290 struct ofconn *ofconn;
1292 LIST_FOR_EACH (ofconn, node, &mgr->all_conns) {
1293 if (ofconn_receives_async_msg(ofconn, OAM_PACKET_IN, pin->reason)
1294 && ofconn->controller_id == pin->controller_id) {
1295 schedule_packet_in(ofconn, *pin);
1300 /* pinsched callback for sending 'ofp_packet_in' on 'ofconn'. */
1302 do_send_packet_in(struct ofpbuf *ofp_packet_in, void *ofconn_)
1304 struct ofconn *ofconn = ofconn_;
1306 rconn_send_with_limit(ofconn->rconn, ofp_packet_in,
1307 ofconn->packet_in_counter, 100);
1310 /* Takes 'pin', composes an OpenFlow packet-in message from it, and passes it
1311 * to 'ofconn''s packet scheduler for sending. */
1313 schedule_packet_in(struct ofconn *ofconn, struct ofputil_packet_in pin)
1315 struct connmgr *mgr = ofconn->connmgr;
1317 pin.total_len = pin.packet_len;
1319 /* Get OpenFlow buffer_id. */
1320 if (pin.reason == OFPR_ACTION) {
1321 pin.buffer_id = UINT32_MAX;
1322 } else if (mgr->fail_open && fail_open_is_active(mgr->fail_open)) {
1323 pin.buffer_id = pktbuf_get_null();
1324 } else if (!ofconn->pktbuf) {
1325 pin.buffer_id = UINT32_MAX;
1327 pin.buffer_id = pktbuf_save(ofconn->pktbuf, pin.packet, pin.packet_len,
1331 /* Figure out how much of the packet to send. */
1332 if (pin.reason == OFPR_NO_MATCH) {
1333 pin.send_len = pin.packet_len;
1335 /* Caller should have initialized 'send_len' to 'max_len' specified in
1336 * struct ofp_action_output. */
1338 if (pin.buffer_id != UINT32_MAX) {
1339 pin.send_len = MIN(pin.send_len, ofconn->miss_send_len);
1342 /* Make OFPT_PACKET_IN and hand over to packet scheduler. It might
1343 * immediately call into do_send_packet_in() or it might buffer it for a
1344 * while (until a later call to pinsched_run()). */
1345 pinsched_send(ofconn->schedulers[pin.reason == OFPR_NO_MATCH ? 0 : 1],
1347 ofputil_encode_packet_in(&pin, ofconn->packet_in_format),
1348 do_send_packet_in, ofconn);
1351 /* Fail-open settings. */
1353 /* Returns the failure handling mode (OFPROTO_FAIL_SECURE or
1354 * OFPROTO_FAIL_STANDALONE) for 'mgr'. */
1355 enum ofproto_fail_mode
1356 connmgr_get_fail_mode(const struct connmgr *mgr)
1358 return mgr->fail_mode;
1361 /* Sets the failure handling mode for 'mgr' to 'fail_mode' (either
1362 * OFPROTO_FAIL_SECURE or OFPROTO_FAIL_STANDALONE). */
1364 connmgr_set_fail_mode(struct connmgr *mgr, enum ofproto_fail_mode fail_mode)
1366 if (mgr->fail_mode != fail_mode) {
1367 mgr->fail_mode = fail_mode;
1368 update_fail_open(mgr);
1369 if (!connmgr_has_controllers(mgr)) {
1370 ofproto_flush_flows(mgr->ofproto);
1375 /* Fail-open implementation. */
1377 /* Returns the longest probe interval among the primary controllers configured
1378 * on 'mgr'. Returns 0 if there are no primary controllers. */
1380 connmgr_get_max_probe_interval(const struct connmgr *mgr)
1382 const struct ofconn *ofconn;
1383 int max_probe_interval;
1385 max_probe_interval = 0;
1386 HMAP_FOR_EACH (ofconn, hmap_node, &mgr->controllers) {
1387 int probe_interval = rconn_get_probe_interval(ofconn->rconn);
1388 max_probe_interval = MAX(max_probe_interval, probe_interval);
1390 return max_probe_interval;
1393 /* Returns the number of seconds for which all of 'mgr's primary controllers
1394 * have been disconnected. Returns 0 if 'mgr' has no primary controllers. */
1396 connmgr_failure_duration(const struct connmgr *mgr)
1398 const struct ofconn *ofconn;
1399 int min_failure_duration;
1401 if (!connmgr_has_controllers(mgr)) {
1405 min_failure_duration = INT_MAX;
1406 HMAP_FOR_EACH (ofconn, hmap_node, &mgr->controllers) {
1407 int failure_duration = rconn_failure_duration(ofconn->rconn);
1408 min_failure_duration = MIN(min_failure_duration, failure_duration);
1410 return min_failure_duration;
1413 /* Returns true if at least one primary controller is connected (regardless of
1414 * whether those controllers are believed to have authenticated and accepted
1415 * this switch), false if none of them are connected. */
1417 connmgr_is_any_controller_connected(const struct connmgr *mgr)
1419 const struct ofconn *ofconn;
1421 HMAP_FOR_EACH (ofconn, hmap_node, &mgr->controllers) {
1422 if (rconn_is_connected(ofconn->rconn)) {
1429 /* Returns true if at least one primary controller is believed to have
1430 * authenticated and accepted this switch, false otherwise. */
1432 connmgr_is_any_controller_admitted(const struct connmgr *mgr)
1434 const struct ofconn *ofconn;
1436 HMAP_FOR_EACH (ofconn, hmap_node, &mgr->controllers) {
1437 if (rconn_is_admitted(ofconn->rconn)) {
1444 /* In-band configuration. */
1446 static bool any_extras_changed(const struct connmgr *,
1447 const struct sockaddr_in *extras, size_t n);
1449 /* Sets the 'n' TCP port addresses in 'extras' as ones to which 'mgr''s
1450 * in-band control should guarantee access, in the same way that in-band
1451 * control guarantees access to OpenFlow controllers. */
1453 connmgr_set_extra_in_band_remotes(struct connmgr *mgr,
1454 const struct sockaddr_in *extras, size_t n)
1456 if (!any_extras_changed(mgr, extras, n)) {
1460 free(mgr->extra_in_band_remotes);
1461 mgr->n_extra_remotes = n;
1462 mgr->extra_in_band_remotes = xmemdup(extras, n * sizeof *extras);
1464 update_in_band_remotes(mgr);
1467 /* Sets the OpenFlow queue used by flows set up by in-band control on
1468 * 'mgr' to 'queue_id'. If 'queue_id' is negative, then in-band control
1469 * flows will use the default queue. */
1471 connmgr_set_in_band_queue(struct connmgr *mgr, int queue_id)
1473 if (queue_id != mgr->in_band_queue) {
1474 mgr->in_band_queue = queue_id;
1475 update_in_band_remotes(mgr);
1480 any_extras_changed(const struct connmgr *mgr,
1481 const struct sockaddr_in *extras, size_t n)
1485 if (n != mgr->n_extra_remotes) {
1489 for (i = 0; i < n; i++) {
1490 const struct sockaddr_in *old = &mgr->extra_in_band_remotes[i];
1491 const struct sockaddr_in *new = &extras[i];
1493 if (old->sin_addr.s_addr != new->sin_addr.s_addr ||
1494 old->sin_port != new->sin_port) {
1502 /* In-band implementation. */
1505 connmgr_msg_in_hook(struct connmgr *mgr, const struct flow *flow,
1506 const struct ofpbuf *packet)
1508 return mgr->in_band && in_band_msg_in_hook(mgr->in_band, flow, packet);
1512 connmgr_may_set_up_flow(struct connmgr *mgr, const struct flow *flow,
1513 const struct nlattr *odp_actions,
1516 return !mgr->in_band || in_band_rule_check(flow, odp_actions, actions_len);
1519 /* Fail-open and in-band implementation. */
1521 /* Called by 'ofproto' after all flows have been flushed, to allow fail-open
1522 * and standalone mode to re-create their flows.
1524 * In-band control has more sophisticated code that manages flows itself. */
1526 connmgr_flushed(struct connmgr *mgr)
1528 if (mgr->fail_open) {
1529 fail_open_flushed(mgr->fail_open);
1532 /* If there are no controllers and we're in standalone mode, set up a flow
1533 * that matches every packet and directs them to OFPP_NORMAL (which goes to
1534 * us). Otherwise, the switch is in secure mode and we won't pass any
1535 * traffic until a controller has been defined and it tells us to do so. */
1536 if (!connmgr_has_controllers(mgr)
1537 && mgr->fail_mode == OFPROTO_FAIL_STANDALONE) {
1538 union ofp_action action;
1539 struct cls_rule rule;
1541 memset(&action, 0, sizeof action);
1542 action.type = htons(OFPAT10_OUTPUT);
1543 action.output.len = htons(sizeof action);
1544 action.output.port = htons(OFPP_NORMAL);
1545 cls_rule_init_catchall(&rule, 0);
1546 ofproto_add_flow(mgr->ofproto, &rule, &action, 1);
1550 /* Creates a new ofservice for 'target' in 'mgr'. Returns 0 if successful,
1551 * otherwise a positive errno value.
1553 * ofservice_reconfigure() must be called to fully configure the new
1556 ofservice_create(struct connmgr *mgr, const char *target, uint8_t dscp)
1558 struct ofservice *ofservice;
1559 struct pvconn *pvconn;
1562 error = pvconn_open(target, &pvconn, dscp);
1567 ofservice = xzalloc(sizeof *ofservice);
1568 hmap_insert(&mgr->services, &ofservice->node, hash_string(target, 0));
1569 ofservice->pvconn = pvconn;
1575 ofservice_destroy(struct connmgr *mgr, struct ofservice *ofservice)
1577 hmap_remove(&mgr->services, &ofservice->node);
1578 pvconn_close(ofservice->pvconn);
1583 ofservice_reconfigure(struct ofservice *ofservice,
1584 const struct ofproto_controller *c)
1586 ofservice->probe_interval = c->probe_interval;
1587 ofservice->rate_limit = c->rate_limit;
1588 ofservice->burst_limit = c->burst_limit;
1589 ofservice->enable_async_msgs = c->enable_async_msgs;
1590 ofservice->dscp = c->dscp;
1593 /* Finds and returns the ofservice within 'mgr' that has the given
1594 * 'target', or a null pointer if none exists. */
1595 static struct ofservice *
1596 ofservice_lookup(struct connmgr *mgr, const char *target)
1598 struct ofservice *ofservice;
1600 HMAP_FOR_EACH_WITH_HASH (ofservice, node, hash_string(target, 0),
1602 if (!strcmp(pvconn_get_name(ofservice->pvconn), target)) {