2 * Copyright (c) 2009, 2010, 2011 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 struct connmgr
*connmgr
; /* Connection's manager. */
47 struct list node
; /* In struct connmgr's "all_conns" list. */
48 struct rconn
*rconn
; /* OpenFlow connection. */
49 enum ofconn_type type
; /* Type. */
50 enum nx_flow_format flow_format
; /* Currently selected flow format. */
51 enum nx_packet_in_format packet_in_format
; /* OFPT_PACKET_IN format. */
52 bool flow_mod_table_id
; /* NXT_FLOW_MOD_TABLE_ID enabled? */
54 /* Asynchronous flow table operation support. */
55 struct list opgroups
; /* Contains pending "ofopgroups", if any. */
56 struct ofpbuf
*blocked
; /* Postponed OpenFlow message, if any. */
57 bool retry
; /* True if 'blocked' is ready to try again. */
59 /* OFPT_PACKET_IN related data. */
60 struct rconn_packet_counter
*packet_in_counter
; /* # queued on 'rconn'. */
61 #define N_SCHEDULERS 2
62 struct pinsched
*schedulers
[N_SCHEDULERS
];
63 struct pktbuf
*pktbuf
; /* OpenFlow packet buffers. */
64 int miss_send_len
; /* Bytes to send of buffered packets. */
66 /* Number of OpenFlow messages queued on 'rconn' as replies to OpenFlow
67 * requests, and the maximum number before we stop reading OpenFlow
69 #define OFCONN_REPLY_MAX 100
70 struct rconn_packet_counter
*reply_counter
;
72 /* type == OFCONN_PRIMARY only. */
73 enum nx_role role
; /* Role. */
74 struct hmap_node hmap_node
; /* In struct connmgr's "controllers" map. */
75 enum ofproto_band band
; /* In-band or out-of-band? */
78 static struct ofconn
*ofconn_create(struct connmgr
*, struct rconn
*,
80 static void ofconn_destroy(struct ofconn
*);
82 static void ofconn_reconfigure(struct ofconn
*,
83 const struct ofproto_controller
*);
85 static void ofconn_run(struct ofconn
*,
86 bool (*handle_openflow
)(struct ofconn
*,
87 struct ofpbuf
*ofp_msg
));
88 static void ofconn_wait(struct ofconn
*, bool handling_openflow
);
90 static const char *ofconn_get_target(const struct ofconn
*);
91 static char *ofconn_make_name(const struct connmgr
*, const char *target
);
93 static void ofconn_set_rate_limit(struct ofconn
*, int rate
, int burst
);
95 static bool ofconn_receives_async_msgs(const struct ofconn
*);
97 static void ofconn_send(const struct ofconn
*, struct ofpbuf
*,
98 struct rconn_packet_counter
*);
100 static void do_send_packet_in(struct ofpbuf
*, void *ofconn_
);
102 /* A listener for incoming OpenFlow "service" connections. */
104 struct hmap_node node
; /* In struct connmgr's "services" hmap. */
105 struct pvconn
*pvconn
; /* OpenFlow connection listener. */
107 /* These are not used by ofservice directly. They are settings for
108 * accepted "struct ofconn"s from the pvconn. */
109 int probe_interval
; /* Max idle time before probing, in seconds. */
110 int rate_limit
; /* Max packet-in rate in packets per second. */
111 int burst_limit
; /* Limit on accumulating packet credits. */
114 static void ofservice_reconfigure(struct ofservice
*,
115 const struct ofproto_controller
*);
116 static int ofservice_create(struct connmgr
*, const char *target
);
117 static void ofservice_destroy(struct connmgr
*, struct ofservice
*);
118 static struct ofservice
*ofservice_lookup(struct connmgr
*,
121 /* Connection manager for an OpenFlow switch. */
123 struct ofproto
*ofproto
;
125 char *local_port_name
;
127 /* OpenFlow connections. */
128 struct hmap controllers
; /* Controller "struct ofconn"s. */
129 struct list all_conns
; /* Contains "struct ofconn"s. */
131 /* OpenFlow listeners. */
132 struct hmap services
; /* Contains "struct ofservice"s. */
133 struct pvconn
**snoops
;
137 struct fail_open
*fail_open
;
138 enum ofproto_fail_mode fail_mode
;
140 /* In-band control. */
141 struct in_band
*in_band
;
142 struct sockaddr_in
*extra_in_band_remotes
;
143 size_t n_extra_remotes
;
147 static void update_in_band_remotes(struct connmgr
*);
148 static void add_snooper(struct connmgr
*, struct vconn
*);
150 /* Creates and returns a new connection manager owned by 'ofproto'. 'name' is
151 * a name for the ofproto suitable for using in log messages.
152 * 'local_port_name' is the name of the local port (OFPP_LOCAL) within
155 connmgr_create(struct ofproto
*ofproto
,
156 const char *name
, const char *local_port_name
)
160 mgr
= xmalloc(sizeof *mgr
);
161 mgr
->ofproto
= ofproto
;
162 mgr
->name
= xstrdup(name
);
163 mgr
->local_port_name
= xstrdup(local_port_name
);
165 hmap_init(&mgr
->controllers
);
166 list_init(&mgr
->all_conns
);
168 hmap_init(&mgr
->services
);
172 mgr
->fail_open
= NULL
;
173 mgr
->fail_mode
= OFPROTO_FAIL_SECURE
;
176 mgr
->extra_in_band_remotes
= NULL
;
177 mgr
->n_extra_remotes
= 0;
178 mgr
->in_band_queue
= -1;
183 /* Frees 'mgr' and all of its resources. */
185 connmgr_destroy(struct connmgr
*mgr
)
187 struct ofservice
*ofservice
, *next_ofservice
;
188 struct ofconn
*ofconn
, *next_ofconn
;
195 LIST_FOR_EACH_SAFE (ofconn
, next_ofconn
, node
, &mgr
->all_conns
) {
196 ofconn_destroy(ofconn
);
198 hmap_destroy(&mgr
->controllers
);
200 HMAP_FOR_EACH_SAFE (ofservice
, next_ofservice
, node
, &mgr
->services
) {
201 ofservice_destroy(mgr
, ofservice
);
203 hmap_destroy(&mgr
->services
);
205 for (i
= 0; i
< mgr
->n_snoops
; i
++) {
206 pvconn_close(mgr
->snoops
[i
]);
210 fail_open_destroy(mgr
->fail_open
);
211 mgr
->fail_open
= NULL
;
213 in_band_destroy(mgr
->in_band
);
215 free(mgr
->extra_in_band_remotes
);
217 free(mgr
->local_port_name
);
222 /* Does all of the periodic maintenance required by 'mgr'.
224 * If 'handle_openflow' is nonnull, calls 'handle_openflow' for each message
225 * received on an OpenFlow connection, passing along the OpenFlow connection
226 * itself and the message that was sent. If 'handle_openflow' returns true,
227 * the message is considered to be fully processed. If 'handle_openflow'
228 * returns false, the message is considered not to have been processed at all;
229 * it will be stored and re-presented to 'handle_openflow' following the next
230 * call to connmgr_retry(). 'handle_openflow' must not modify or free the
233 * If 'handle_openflow' is NULL, no OpenFlow messages will be processed and
234 * other activities that could affect the flow table (in-band processing,
235 * fail-open processing) are suppressed too. */
237 connmgr_run(struct connmgr
*mgr
,
238 bool (*handle_openflow
)(struct ofconn
*, struct ofpbuf
*ofp_msg
))
240 struct ofconn
*ofconn
, *next_ofconn
;
241 struct ofservice
*ofservice
;
244 if (handle_openflow
&& mgr
->in_band
) {
245 if (!in_band_run(mgr
->in_band
)) {
246 in_band_destroy(mgr
->in_band
);
251 LIST_FOR_EACH_SAFE (ofconn
, next_ofconn
, node
, &mgr
->all_conns
) {
252 ofconn_run(ofconn
, handle_openflow
);
255 /* Fail-open maintenance. Do this after processing the ofconns since
256 * fail-open checks the status of the controller rconn. */
257 if (handle_openflow
&& mgr
->fail_open
) {
258 fail_open_run(mgr
->fail_open
);
261 HMAP_FOR_EACH (ofservice
, node
, &mgr
->services
) {
265 retval
= pvconn_accept(ofservice
->pvconn
, OFP_VERSION
, &vconn
);
270 rconn
= rconn_create(ofservice
->probe_interval
, 0);
271 name
= ofconn_make_name(mgr
, vconn_get_name(vconn
));
272 rconn_connect_unreliably(rconn
, vconn
, name
);
275 ofconn
= ofconn_create(mgr
, rconn
, OFCONN_SERVICE
);
276 ofconn_set_rate_limit(ofconn
, ofservice
->rate_limit
,
277 ofservice
->burst_limit
);
278 } else if (retval
!= EAGAIN
) {
279 VLOG_WARN_RL(&rl
, "accept failed (%s)", strerror(retval
));
283 for (i
= 0; i
< mgr
->n_snoops
; i
++) {
287 retval
= pvconn_accept(mgr
->snoops
[i
], OFP_VERSION
, &vconn
);
289 add_snooper(mgr
, vconn
);
290 } else if (retval
!= EAGAIN
) {
291 VLOG_WARN_RL(&rl
, "accept failed (%s)", strerror(retval
));
296 /* Causes the poll loop to wake up when connmgr_run() needs to run.
298 * If 'handling_openflow' is true, arriving OpenFlow messages and other
299 * activities that affect the flow table will wake up the poll loop. If
300 * 'handling_openflow' is false, they will not. */
302 connmgr_wait(struct connmgr
*mgr
, bool handling_openflow
)
304 struct ofservice
*ofservice
;
305 struct ofconn
*ofconn
;
308 LIST_FOR_EACH (ofconn
, node
, &mgr
->all_conns
) {
309 ofconn_wait(ofconn
, handling_openflow
);
311 if (handling_openflow
&& mgr
->in_band
) {
312 in_band_wait(mgr
->in_band
);
314 if (handling_openflow
&& mgr
->fail_open
) {
315 fail_open_wait(mgr
->fail_open
);
317 HMAP_FOR_EACH (ofservice
, node
, &mgr
->services
) {
318 pvconn_wait(ofservice
->pvconn
);
320 for (i
= 0; i
< mgr
->n_snoops
; i
++) {
321 pvconn_wait(mgr
->snoops
[i
]);
325 /* Returns the ofproto that owns 'ofconn''s connmgr. */
327 ofconn_get_ofproto(const struct ofconn
*ofconn
)
329 return ofconn
->connmgr
->ofproto
;
332 /* If processing of OpenFlow messages was blocked on any 'mgr' ofconns by
333 * returning false to the 'handle_openflow' callback to connmgr_run(), this
334 * re-enables them. */
336 connmgr_retry(struct connmgr
*mgr
)
338 struct ofconn
*ofconn
;
340 LIST_FOR_EACH (ofconn
, node
, &mgr
->all_conns
) {
341 ofconn
->retry
= true;
345 /* OpenFlow configuration. */
347 static void add_controller(struct connmgr
*, const char *target
);
348 static struct ofconn
*find_controller_by_target(struct connmgr
*,
350 static void update_fail_open(struct connmgr
*);
351 static int set_pvconns(struct pvconn
***pvconnsp
, size_t *n_pvconnsp
,
352 const struct sset
*);
354 /* Returns true if 'mgr' has any configured primary controllers.
356 * Service controllers do not count, but configured primary controllers do
357 * count whether or not they are currently connected. */
359 connmgr_has_controllers(const struct connmgr
*mgr
)
361 return !hmap_is_empty(&mgr
->controllers
);
364 /* Initializes 'info' and populates it with information about each configured
365 * primary controller. The keys in 'info' are the controllers' targets; the
366 * data values are corresponding "struct ofproto_controller_info".
368 * The caller owns 'info' and everything in it and should free it when it is no
371 connmgr_get_controller_info(struct connmgr
*mgr
, struct shash
*info
)
373 const struct ofconn
*ofconn
;
375 HMAP_FOR_EACH (ofconn
, hmap_node
, &mgr
->controllers
) {
376 const struct rconn
*rconn
= ofconn
->rconn
;
377 const char *target
= rconn_get_target(rconn
);
379 if (!shash_find(info
, target
)) {
380 struct ofproto_controller_info
*cinfo
= xmalloc(sizeof *cinfo
);
381 time_t now
= time_now();
382 time_t last_connection
= rconn_get_last_connection(rconn
);
383 time_t last_disconnect
= rconn_get_last_disconnect(rconn
);
384 int last_error
= rconn_get_last_error(rconn
);
386 shash_add(info
, target
, cinfo
);
388 cinfo
->is_connected
= rconn_is_connected(rconn
);
389 cinfo
->role
= ofconn
->role
;
394 cinfo
->pairs
.keys
[cinfo
->pairs
.n
] = "last_error";
395 cinfo
->pairs
.values
[cinfo
->pairs
.n
++]
396 = xstrdup(ovs_retval_to_string(last_error
));
399 cinfo
->pairs
.keys
[cinfo
->pairs
.n
] = "state";
400 cinfo
->pairs
.values
[cinfo
->pairs
.n
++]
401 = xstrdup(rconn_get_state(rconn
));
403 if (last_connection
!= TIME_MIN
) {
404 cinfo
->pairs
.keys
[cinfo
->pairs
.n
] = "sec_since_connect";
405 cinfo
->pairs
.values
[cinfo
->pairs
.n
++]
406 = xasprintf("%ld", (long int) (now
- last_connection
));
409 if (last_disconnect
!= TIME_MIN
) {
410 cinfo
->pairs
.keys
[cinfo
->pairs
.n
] = "sec_since_disconnect";
411 cinfo
->pairs
.values
[cinfo
->pairs
.n
++]
412 = xasprintf("%ld", (long int) (now
- last_disconnect
));
419 connmgr_free_controller_info(struct shash
*info
)
421 struct shash_node
*node
;
423 SHASH_FOR_EACH (node
, info
) {
424 struct ofproto_controller_info
*cinfo
= node
->data
;
425 while (cinfo
->pairs
.n
) {
426 free((char *) cinfo
->pairs
.values
[--cinfo
->pairs
.n
]);
433 /* Changes 'mgr''s set of controllers to the 'n_controllers' controllers in
436 connmgr_set_controllers(struct connmgr
*mgr
,
437 const struct ofproto_controller
*controllers
,
438 size_t n_controllers
)
440 bool had_controllers
= connmgr_has_controllers(mgr
);
441 struct shash new_controllers
;
442 struct ofconn
*ofconn
, *next_ofconn
;
443 struct ofservice
*ofservice
, *next_ofservice
;
446 /* Create newly configured controllers and services.
447 * Create a name to ofproto_controller mapping in 'new_controllers'. */
448 shash_init(&new_controllers
);
449 for (i
= 0; i
< n_controllers
; i
++) {
450 const struct ofproto_controller
*c
= &controllers
[i
];
452 if (!vconn_verify_name(c
->target
)) {
453 if (!find_controller_by_target(mgr
, c
->target
)) {
454 add_controller(mgr
, c
->target
);
456 } else if (!pvconn_verify_name(c
->target
)) {
457 if (!ofservice_lookup(mgr
, c
->target
)) {
458 ofservice_create(mgr
, c
->target
);
461 VLOG_WARN_RL(&rl
, "%s: unsupported controller \"%s\"",
462 mgr
->name
, c
->target
);
466 shash_add_once(&new_controllers
, c
->target
, &controllers
[i
]);
469 /* Delete controllers that are no longer configured.
470 * Update configuration of all now-existing controllers. */
471 HMAP_FOR_EACH_SAFE (ofconn
, next_ofconn
, hmap_node
, &mgr
->controllers
) {
472 struct ofproto_controller
*c
;
474 c
= shash_find_data(&new_controllers
, ofconn_get_target(ofconn
));
476 ofconn_destroy(ofconn
);
478 ofconn_reconfigure(ofconn
, c
);
482 /* Delete services that are no longer configured.
483 * Update configuration of all now-existing services. */
484 HMAP_FOR_EACH_SAFE (ofservice
, next_ofservice
, node
, &mgr
->services
) {
485 struct ofproto_controller
*c
;
487 c
= shash_find_data(&new_controllers
,
488 pvconn_get_name(ofservice
->pvconn
));
490 ofservice_destroy(mgr
, ofservice
);
492 ofservice_reconfigure(ofservice
, c
);
496 shash_destroy(&new_controllers
);
498 update_in_band_remotes(mgr
);
499 update_fail_open(mgr
);
500 if (had_controllers
!= connmgr_has_controllers(mgr
)) {
501 ofproto_flush_flows(mgr
->ofproto
);
505 /* Drops the connections between 'mgr' and all of its primary and secondary
506 * controllers, forcing them to reconnect. */
508 connmgr_reconnect(const struct connmgr
*mgr
)
510 struct ofconn
*ofconn
;
512 LIST_FOR_EACH (ofconn
, node
, &mgr
->all_conns
) {
513 rconn_reconnect(ofconn
->rconn
);
517 /* Sets the "snoops" for 'mgr' to the pvconn targets listed in 'snoops'.
519 * A "snoop" is a pvconn to which every OpenFlow message to or from the most
520 * important controller on 'mgr' is mirrored. */
522 connmgr_set_snoops(struct connmgr
*mgr
, const struct sset
*snoops
)
524 return set_pvconns(&mgr
->snoops
, &mgr
->n_snoops
, snoops
);
527 /* Adds each of the snoops currently configured on 'mgr' to 'snoops'. */
529 connmgr_get_snoops(const struct connmgr
*mgr
, struct sset
*snoops
)
533 for (i
= 0; i
< mgr
->n_snoops
; i
++) {
534 sset_add(snoops
, pvconn_get_name(mgr
->snoops
[i
]));
538 /* Returns true if 'mgr' has at least one snoop, false if it has none. */
540 connmgr_has_snoops(const struct connmgr
*mgr
)
542 return mgr
->n_snoops
> 0;
545 /* Creates a new controller for 'target' in 'mgr'. update_controller() needs
546 * to be called later to finish the new ofconn's configuration. */
548 add_controller(struct connmgr
*mgr
, const char *target
)
550 char *name
= ofconn_make_name(mgr
, target
);
551 struct ofconn
*ofconn
;
553 ofconn
= ofconn_create(mgr
, rconn_create(5, 8), OFCONN_PRIMARY
);
554 ofconn
->pktbuf
= pktbuf_create();
555 ofconn
->miss_send_len
= OFP_DEFAULT_MISS_SEND_LEN
;
556 rconn_connect(ofconn
->rconn
, target
, name
);
557 hmap_insert(&mgr
->controllers
, &ofconn
->hmap_node
, hash_string(target
, 0));
562 static struct ofconn
*
563 find_controller_by_target(struct connmgr
*mgr
, const char *target
)
565 struct ofconn
*ofconn
;
567 HMAP_FOR_EACH_WITH_HASH (ofconn
, hmap_node
,
568 hash_string(target
, 0), &mgr
->controllers
) {
569 if (!strcmp(ofconn_get_target(ofconn
), target
)) {
577 update_in_band_remotes(struct connmgr
*mgr
)
579 struct sockaddr_in
*addrs
;
580 size_t max_addrs
, n_addrs
;
581 struct ofconn
*ofconn
;
584 /* Allocate enough memory for as many remotes as we could possibly have. */
585 max_addrs
= mgr
->n_extra_remotes
+ hmap_count(&mgr
->controllers
);
586 addrs
= xmalloc(max_addrs
* sizeof *addrs
);
589 /* Add all the remotes. */
590 HMAP_FOR_EACH (ofconn
, hmap_node
, &mgr
->controllers
) {
591 struct sockaddr_in
*sin
= &addrs
[n_addrs
];
592 const char *target
= rconn_get_target(ofconn
->rconn
);
594 if (ofconn
->band
== OFPROTO_OUT_OF_BAND
) {
598 if (stream_parse_target_with_default_ports(target
,
605 for (i
= 0; i
< mgr
->n_extra_remotes
; i
++) {
606 addrs
[n_addrs
++] = mgr
->extra_in_band_remotes
[i
];
609 /* Create or update or destroy in-band. */
612 in_band_create(mgr
->ofproto
, mgr
->local_port_name
, &mgr
->in_band
);
614 in_band_set_queue(mgr
->in_band
, mgr
->in_band_queue
);
616 /* in_band_run() needs a chance to delete any existing in-band flows.
617 * We will destroy mgr->in_band after it's done with that. */
620 in_band_set_remotes(mgr
->in_band
, addrs
, n_addrs
);
628 update_fail_open(struct connmgr
*mgr
)
630 if (connmgr_has_controllers(mgr
)
631 && mgr
->fail_mode
== OFPROTO_FAIL_STANDALONE
) {
632 if (!mgr
->fail_open
) {
633 mgr
->fail_open
= fail_open_create(mgr
->ofproto
, mgr
);
636 fail_open_destroy(mgr
->fail_open
);
637 mgr
->fail_open
= NULL
;
642 set_pvconns(struct pvconn
***pvconnsp
, size_t *n_pvconnsp
,
643 const struct sset
*sset
)
645 struct pvconn
**pvconns
= *pvconnsp
;
646 size_t n_pvconns
= *n_pvconnsp
;
651 for (i
= 0; i
< n_pvconns
; i
++) {
652 pvconn_close(pvconns
[i
]);
656 pvconns
= xmalloc(sset_count(sset
) * sizeof *pvconns
);
658 SSET_FOR_EACH (name
, sset
) {
659 struct pvconn
*pvconn
;
662 error
= pvconn_open(name
, &pvconn
);
664 pvconns
[n_pvconns
++] = pvconn
;
666 VLOG_ERR("failed to listen on %s: %s", name
, strerror(error
));
674 *n_pvconnsp
= n_pvconns
;
679 /* Returns a "preference level" for snooping 'ofconn'. A higher return value
680 * means that 'ofconn' is more interesting for monitoring than a lower return
683 snoop_preference(const struct ofconn
*ofconn
)
685 switch (ofconn
->role
) {
693 /* Shouldn't happen. */
698 /* One of 'mgr''s "snoop" pvconns has accepted a new connection on 'vconn'.
699 * Connects this vconn to a controller. */
701 add_snooper(struct connmgr
*mgr
, struct vconn
*vconn
)
703 struct ofconn
*ofconn
, *best
;
705 /* Pick a controller for monitoring. */
707 LIST_FOR_EACH (ofconn
, node
, &mgr
->all_conns
) {
708 if (ofconn
->type
== OFCONN_PRIMARY
709 && (!best
|| snoop_preference(ofconn
) > snoop_preference(best
))) {
715 rconn_add_monitor(best
->rconn
, vconn
);
717 VLOG_INFO_RL(&rl
, "no controller connection to snoop");
722 /* Public ofconn functions. */
724 /* Returns the connection type, either OFCONN_PRIMARY or OFCONN_SERVICE. */
726 ofconn_get_type(const struct ofconn
*ofconn
)
731 /* Returns the role configured for 'ofconn'.
733 * The default role, if no other role has been set, is NX_ROLE_OTHER. */
735 ofconn_get_role(const struct ofconn
*ofconn
)
740 /* Changes 'ofconn''s role to 'role'. If 'role' is NX_ROLE_MASTER then any
741 * existing master is demoted to a slave. */
743 ofconn_set_role(struct ofconn
*ofconn
, enum nx_role role
)
745 if (role
== NX_ROLE_MASTER
) {
746 struct ofconn
*other
;
748 HMAP_FOR_EACH (other
, hmap_node
, &ofconn
->connmgr
->controllers
) {
749 if (other
->role
== NX_ROLE_MASTER
) {
750 other
->role
= NX_ROLE_SLAVE
;
757 /* Returns the currently configured flow format for 'ofconn', one of NXFF_*.
759 * The default, if no other format has been set, is NXFF_OPENFLOW10. */
761 ofconn_get_flow_format(struct ofconn
*ofconn
)
763 return ofconn
->flow_format
;
766 /* Sets the flow format for 'ofconn' to 'flow_format' (one of NXFF_*). */
768 ofconn_set_flow_format(struct ofconn
*ofconn
, enum nx_flow_format flow_format
)
770 ofconn
->flow_format
= flow_format
;
773 /* Returns the currently configured packet in format for 'ofconn', one of
776 * The default, if no other format has been set, is NXPIF_OPENFLOW10. */
777 enum nx_packet_in_format
778 ofconn_get_packet_in_format(struct ofconn
*ofconn
)
780 return ofconn
->packet_in_format
;
783 /* Sets the packet in format for 'ofconn' to 'packet_in_format' (one of
786 ofconn_set_packet_in_format(struct ofconn
*ofconn
,
787 enum nx_packet_in_format packet_in_format
)
789 ofconn
->packet_in_format
= packet_in_format
;
792 /* Returns true if the NXT_FLOW_MOD_TABLE_ID extension is enabled, false
795 * By default the extension is not enabled. */
797 ofconn_get_flow_mod_table_id(const struct ofconn
*ofconn
)
799 return ofconn
->flow_mod_table_id
;
802 /* Enables or disables (according to 'enable') the NXT_FLOW_MOD_TABLE_ID
803 * extension on 'ofconn'. */
805 ofconn_set_flow_mod_table_id(struct ofconn
*ofconn
, bool enable
)
807 ofconn
->flow_mod_table_id
= enable
;
810 /* Returns the default miss send length for 'ofconn'. */
812 ofconn_get_miss_send_len(const struct ofconn
*ofconn
)
814 return ofconn
->miss_send_len
;
817 /* Sets the default miss send length for 'ofconn' to 'miss_send_len'. */
819 ofconn_set_miss_send_len(struct ofconn
*ofconn
, int miss_send_len
)
821 ofconn
->miss_send_len
= miss_send_len
;
824 /* Sends 'msg' on 'ofconn', accounting it as a reply. (If there is a
825 * sufficient number of OpenFlow replies in-flight on a single ofconn, then the
826 * connmgr will stop accepting new OpenFlow requests on that ofconn until the
827 * controller has accepted some of the replies.) */
829 ofconn_send_reply(const struct ofconn
*ofconn
, struct ofpbuf
*msg
)
831 ofconn_send(ofconn
, msg
, ofconn
->reply_counter
);
834 /* Sends each of the messages in list 'replies' on 'ofconn' in order,
835 * accounting them as replies. */
837 ofconn_send_replies(const struct ofconn
*ofconn
, struct list
*replies
)
839 struct ofpbuf
*reply
, *next
;
841 LIST_FOR_EACH_SAFE (reply
, next
, list_node
, replies
) {
842 list_remove(&reply
->list_node
);
843 ofconn_send_reply(ofconn
, reply
);
847 /* Sends 'error', which should be an OpenFlow error created with
848 * e.g. ofp_mkerr(), on 'ofconn', as a reply to 'request'. Only at most the
849 * first 64 bytes of 'request' are used. */
851 ofconn_send_error(const struct ofconn
*ofconn
,
852 const struct ofp_header
*request
, int error
)
856 msg
= ofputil_encode_error_msg(error
, request
);
858 static struct vlog_rate_limit err_rl
= VLOG_RATE_LIMIT_INIT(10, 10);
860 if (!VLOG_DROP_INFO(&err_rl
)) {
861 const struct ofputil_msg_type
*type
;
862 const char *type_name
;
866 request_len
= ntohs(request
->length
);
867 type_name
= (!ofputil_decode_msg_type_partial(request
,
868 MIN(64, request_len
),
870 ? ofputil_msg_type_name(type
)
873 error_s
= ofputil_error_to_string(error
);
874 VLOG_INFO("%s: sending %s error reply to %s message",
875 rconn_get_name(ofconn
->rconn
), error_s
, type_name
);
878 ofconn_send_reply(ofconn
, msg
);
882 /* Same as pktbuf_retrieve(), using the pktbuf owned by 'ofconn'. */
884 ofconn_pktbuf_retrieve(struct ofconn
*ofconn
, uint32_t id
,
885 struct ofpbuf
**bufferp
, uint16_t *in_port
)
887 return pktbuf_retrieve(ofconn
->pktbuf
, id
, bufferp
, in_port
);
890 /* Returns true if 'ofconn' has any pending opgroups. */
892 ofconn_has_pending_opgroups(const struct ofconn
*ofconn
)
894 return !list_is_empty(&ofconn
->opgroups
);
897 /* Adds 'ofconn_node' to 'ofconn''s list of pending opgroups.
899 * If 'ofconn' is destroyed or its connection drops, then 'ofconn' will remove
900 * 'ofconn_node' from the list and re-initialize it with list_init(). The
901 * client may, therefore, use list_is_empty(ofconn_node) to determine whether
902 * 'ofconn_node' is still associated with an active ofconn.
904 * The client may also remove ofconn_node from the list itself, with
907 ofconn_add_opgroup(struct ofconn
*ofconn
, struct list
*ofconn_node
)
909 list_push_back(&ofconn
->opgroups
, ofconn_node
);
912 /* Private ofconn functions. */
915 ofconn_get_target(const struct ofconn
*ofconn
)
917 return rconn_get_target(ofconn
->rconn
);
920 static struct ofconn
*
921 ofconn_create(struct connmgr
*mgr
, struct rconn
*rconn
, enum ofconn_type type
)
923 struct ofconn
*ofconn
= xzalloc(sizeof *ofconn
);
924 ofconn
->connmgr
= mgr
;
925 list_push_back(&mgr
->all_conns
, &ofconn
->node
);
926 ofconn
->rconn
= rconn
;
928 ofconn
->flow_format
= NXFF_OPENFLOW10
;
929 ofconn
->packet_in_format
= NXPIF_OPENFLOW10
;
930 ofconn
->flow_mod_table_id
= false;
931 list_init(&ofconn
->opgroups
);
932 ofconn
->role
= NX_ROLE_OTHER
;
933 ofconn
->packet_in_counter
= rconn_packet_counter_create ();
934 ofconn
->pktbuf
= NULL
;
935 ofconn
->miss_send_len
= 0;
936 ofconn
->reply_counter
= rconn_packet_counter_create ();
940 /* Disassociates 'ofconn' from all of the ofopgroups that it initiated that
941 * have not yet completed. (Those ofopgroups will still run to completion in
942 * the usual way, but any errors that they run into will not be reported on any
945 * Also discards any blocked operation on 'ofconn'. */
947 ofconn_flush(struct ofconn
*ofconn
)
949 while (!list_is_empty(&ofconn
->opgroups
)) {
950 list_init(list_pop_front(&ofconn
->opgroups
));
952 ofpbuf_delete(ofconn
->blocked
);
953 ofconn
->blocked
= NULL
;
957 ofconn_destroy(struct ofconn
*ofconn
)
959 ofconn_flush(ofconn
);
961 if (ofconn
->type
== OFCONN_PRIMARY
) {
962 hmap_remove(&ofconn
->connmgr
->controllers
, &ofconn
->hmap_node
);
965 list_remove(&ofconn
->node
);
966 rconn_destroy(ofconn
->rconn
);
967 rconn_packet_counter_destroy(ofconn
->packet_in_counter
);
968 rconn_packet_counter_destroy(ofconn
->reply_counter
);
969 pktbuf_destroy(ofconn
->pktbuf
);
973 /* Reconfigures 'ofconn' to match 'c'. 'ofconn' and 'c' must have the same
976 ofconn_reconfigure(struct ofconn
*ofconn
, const struct ofproto_controller
*c
)
980 ofconn
->band
= c
->band
;
982 rconn_set_max_backoff(ofconn
->rconn
, c
->max_backoff
);
984 probe_interval
= c
->probe_interval
? MAX(c
->probe_interval
, 5) : 0;
985 rconn_set_probe_interval(ofconn
->rconn
, probe_interval
);
987 ofconn_set_rate_limit(ofconn
, c
->rate_limit
, c
->burst_limit
);
990 /* Returns true if it makes sense for 'ofconn' to receive and process OpenFlow
993 ofconn_may_recv(const struct ofconn
*ofconn
)
995 int count
= rconn_packet_counter_read (ofconn
->reply_counter
);
996 return (!ofconn
->blocked
|| ofconn
->retry
) && count
< OFCONN_REPLY_MAX
;
1000 ofconn_run(struct ofconn
*ofconn
,
1001 bool (*handle_openflow
)(struct ofconn
*, struct ofpbuf
*ofp_msg
))
1003 struct connmgr
*mgr
= ofconn
->connmgr
;
1006 for (i
= 0; i
< N_SCHEDULERS
; i
++) {
1007 pinsched_run(ofconn
->schedulers
[i
], do_send_packet_in
, ofconn
);
1010 rconn_run(ofconn
->rconn
);
1012 if (handle_openflow
) {
1013 /* Limit the number of iterations to avoid starving other tasks. */
1014 for (i
= 0; i
< 50 && ofconn_may_recv(ofconn
); i
++) {
1015 struct ofpbuf
*of_msg
;
1017 of_msg
= (ofconn
->blocked
1019 : rconn_recv(ofconn
->rconn
));
1023 if (mgr
->fail_open
) {
1024 fail_open_maybe_recover(mgr
->fail_open
);
1027 if (handle_openflow(ofconn
, of_msg
)) {
1028 ofpbuf_delete(of_msg
);
1029 ofconn
->blocked
= NULL
;
1031 ofconn
->blocked
= of_msg
;
1032 ofconn
->retry
= false;
1037 if (!rconn_is_alive(ofconn
->rconn
)) {
1038 ofconn_destroy(ofconn
);
1039 } else if (!rconn_is_connected(ofconn
->rconn
)) {
1040 ofconn_flush(ofconn
);
1045 ofconn_wait(struct ofconn
*ofconn
, bool handling_openflow
)
1049 for (i
= 0; i
< N_SCHEDULERS
; i
++) {
1050 pinsched_wait(ofconn
->schedulers
[i
]);
1052 rconn_run_wait(ofconn
->rconn
);
1053 if (handling_openflow
&& ofconn_may_recv(ofconn
)) {
1054 rconn_recv_wait(ofconn
->rconn
);
1058 /* Returns true if 'ofconn' should receive asynchronous messages. */
1060 ofconn_receives_async_msgs(const struct ofconn
*ofconn
)
1062 if (!rconn_is_connected(ofconn
->rconn
)) {
1064 } else if (ofconn
->type
== OFCONN_PRIMARY
) {
1065 /* Primary controllers always get asynchronous messages unless they
1066 * have configured themselves as "slaves". */
1067 return ofconn
->role
!= NX_ROLE_SLAVE
;
1069 /* Service connections don't get asynchronous messages unless they have
1070 * explicitly asked for them by setting a nonzero miss send length. */
1071 return ofconn
->miss_send_len
> 0;
1075 /* Returns a human-readable name for an OpenFlow connection between 'mgr' and
1076 * 'target', suitable for use in log messages for identifying the connection.
1078 * The name is dynamically allocated. The caller should free it (with free())
1079 * when it is no longer needed. */
1081 ofconn_make_name(const struct connmgr
*mgr
, const char *target
)
1083 return xasprintf("%s<->%s", mgr
->name
, target
);
1087 ofconn_set_rate_limit(struct ofconn
*ofconn
, int rate
, int burst
)
1091 for (i
= 0; i
< N_SCHEDULERS
; i
++) {
1092 struct pinsched
**s
= &ofconn
->schedulers
[i
];
1096 *s
= pinsched_create(rate
, burst
);
1098 pinsched_set_limits(*s
, rate
, burst
);
1101 pinsched_destroy(*s
);
1108 ofconn_send(const struct ofconn
*ofconn
, struct ofpbuf
*msg
,
1109 struct rconn_packet_counter
*counter
)
1111 update_openflow_length(msg
);
1112 if (rconn_send(ofconn
->rconn
, msg
, counter
)) {
1117 /* Sending asynchronous messages. */
1119 static void schedule_packet_in(struct ofconn
*, struct ofputil_packet_in
,
1120 const struct flow
*);
1122 /* Sends an OFPT_PORT_STATUS message with 'opp' and 'reason' to appropriate
1123 * controllers managed by 'mgr'. */
1125 connmgr_send_port_status(struct connmgr
*mgr
, const struct ofp_phy_port
*opp
,
1128 /* XXX Should limit the number of queued port status change messages. */
1129 struct ofconn
*ofconn
;
1131 LIST_FOR_EACH (ofconn
, node
, &mgr
->all_conns
) {
1132 struct ofp_port_status
*ops
;
1135 /* Primary controllers, even slaves, should always get port status
1136 updates. Otherwise obey ofconn_receives_async_msgs(). */
1137 if (ofconn
->type
!= OFCONN_PRIMARY
1138 && !ofconn_receives_async_msgs(ofconn
)) {
1142 ops
= make_openflow_xid(sizeof *ops
, OFPT_PORT_STATUS
, 0, &b
);
1143 ops
->reason
= reason
;
1145 ofconn_send(ofconn
, b
, NULL
);
1149 /* Sends an OFPT_FLOW_REMOVED or NXT_FLOW_REMOVED message based on 'fr' to
1150 * appropriate controllers managed by 'mgr'. */
1152 connmgr_send_flow_removed(struct connmgr
*mgr
,
1153 const struct ofputil_flow_removed
*fr
)
1155 struct ofconn
*ofconn
;
1157 LIST_FOR_EACH (ofconn
, node
, &mgr
->all_conns
) {
1160 if (!ofconn_receives_async_msgs(ofconn
)) {
1164 /* Account flow expirations as replies to OpenFlow requests. That
1165 * works because preventing OpenFlow requests from being processed also
1166 * prevents new flows from being added (and expiring). (It also
1167 * prevents processing OpenFlow requests that would not add new flows,
1168 * so it is imperfect.) */
1169 msg
= ofputil_encode_flow_removed(fr
, ofconn
->flow_format
);
1170 ofconn_send_reply(ofconn
, msg
);
1174 /* Given 'pin', sends an OFPT_PACKET_IN message to each OpenFlow controller as
1175 * necessary according to their individual configurations. */
1177 connmgr_send_packet_in(struct connmgr
*mgr
,
1178 const struct ofputil_packet_in
*pin
,
1179 const struct flow
*flow
)
1181 struct ofconn
*ofconn
;
1183 LIST_FOR_EACH (ofconn
, node
, &mgr
->all_conns
) {
1184 if (ofconn_receives_async_msgs(ofconn
)) {
1185 schedule_packet_in(ofconn
, *pin
, flow
);
1190 /* pinsched callback for sending 'ofp_packet_in' on 'ofconn'. */
1192 do_send_packet_in(struct ofpbuf
*ofp_packet_in
, void *ofconn_
)
1194 struct ofconn
*ofconn
= ofconn_
;
1196 rconn_send_with_limit(ofconn
->rconn
, ofp_packet_in
,
1197 ofconn
->packet_in_counter
, 100);
1200 /* Takes 'pin', whose packet has the flow specified by 'flow', composes an
1201 * OpenFlow packet-in message from it, and passes it to 'ofconn''s packet
1202 * scheduler for sending. */
1204 schedule_packet_in(struct ofconn
*ofconn
, struct ofputil_packet_in pin
,
1205 const struct flow
*flow
)
1207 struct connmgr
*mgr
= ofconn
->connmgr
;
1209 /* Get OpenFlow buffer_id. */
1210 if (pin
.reason
== OFPR_ACTION
) {
1211 pin
.buffer_id
= UINT32_MAX
;
1212 } else if (mgr
->fail_open
&& fail_open_is_active(mgr
->fail_open
)) {
1213 pin
.buffer_id
= pktbuf_get_null();
1214 } else if (!ofconn
->pktbuf
) {
1215 pin
.buffer_id
= UINT32_MAX
;
1217 pin
.buffer_id
= pktbuf_save(ofconn
->pktbuf
, pin
.packet
, pin
.packet_len
,
1221 /* Figure out how much of the packet to send. */
1222 if (pin
.reason
== OFPR_NO_MATCH
) {
1223 pin
.send_len
= pin
.packet_len
;
1225 /* Caller should have initialized 'send_len' to 'max_len' specified in
1226 * struct ofp_action_output. */
1228 if (pin
.buffer_id
!= UINT32_MAX
) {
1229 pin
.send_len
= MIN(pin
.send_len
, ofconn
->miss_send_len
);
1232 /* Make OFPT_PACKET_IN and hand over to packet scheduler. It might
1233 * immediately call into do_send_packet_in() or it might buffer it for a
1234 * while (until a later call to pinsched_run()). */
1235 pinsched_send(ofconn
->schedulers
[pin
.reason
== OFPR_NO_MATCH
? 0 : 1],
1237 ofputil_encode_packet_in(&pin
, ofconn
->packet_in_format
),
1238 do_send_packet_in
, ofconn
);
1241 /* Fail-open settings. */
1243 /* Returns the failure handling mode (OFPROTO_FAIL_SECURE or
1244 * OFPROTO_FAIL_STANDALONE) for 'mgr'. */
1245 enum ofproto_fail_mode
1246 connmgr_get_fail_mode(const struct connmgr
*mgr
)
1248 return mgr
->fail_mode
;
1251 /* Sets the failure handling mode for 'mgr' to 'fail_mode' (either
1252 * OFPROTO_FAIL_SECURE or OFPROTO_FAIL_STANDALONE). */
1254 connmgr_set_fail_mode(struct connmgr
*mgr
, enum ofproto_fail_mode fail_mode
)
1256 if (mgr
->fail_mode
!= fail_mode
) {
1257 mgr
->fail_mode
= fail_mode
;
1258 update_fail_open(mgr
);
1259 if (!connmgr_has_controllers(mgr
)) {
1260 ofproto_flush_flows(mgr
->ofproto
);
1265 /* Fail-open implementation. */
1267 /* Returns the longest probe interval among the primary controllers configured
1268 * on 'mgr'. Returns 0 if there are no primary controllers. */
1270 connmgr_get_max_probe_interval(const struct connmgr
*mgr
)
1272 const struct ofconn
*ofconn
;
1273 int max_probe_interval
;
1275 max_probe_interval
= 0;
1276 HMAP_FOR_EACH (ofconn
, hmap_node
, &mgr
->controllers
) {
1277 int probe_interval
= rconn_get_probe_interval(ofconn
->rconn
);
1278 max_probe_interval
= MAX(max_probe_interval
, probe_interval
);
1280 return max_probe_interval
;
1283 /* Returns the number of seconds for which all of 'mgr's primary controllers
1284 * have been disconnected. Returns 0 if 'mgr' has no primary controllers. */
1286 connmgr_failure_duration(const struct connmgr
*mgr
)
1288 const struct ofconn
*ofconn
;
1289 int min_failure_duration
;
1291 if (!connmgr_has_controllers(mgr
)) {
1295 min_failure_duration
= INT_MAX
;
1296 HMAP_FOR_EACH (ofconn
, hmap_node
, &mgr
->controllers
) {
1297 int failure_duration
= rconn_failure_duration(ofconn
->rconn
);
1298 min_failure_duration
= MIN(min_failure_duration
, failure_duration
);
1300 return min_failure_duration
;
1303 /* Returns true if at least one primary controller is connected (regardless of
1304 * whether those controllers are believed to have authenticated and accepted
1305 * this switch), false if none of them are connected. */
1307 connmgr_is_any_controller_connected(const struct connmgr
*mgr
)
1309 const struct ofconn
*ofconn
;
1311 HMAP_FOR_EACH (ofconn
, hmap_node
, &mgr
->controllers
) {
1312 if (rconn_is_connected(ofconn
->rconn
)) {
1319 /* Returns true if at least one primary controller is believed to have
1320 * authenticated and accepted this switch, false otherwise. */
1322 connmgr_is_any_controller_admitted(const struct connmgr
*mgr
)
1324 const struct ofconn
*ofconn
;
1326 HMAP_FOR_EACH (ofconn
, hmap_node
, &mgr
->controllers
) {
1327 if (rconn_is_admitted(ofconn
->rconn
)) {
1334 /* Sends 'packet' to each controller connected to 'mgr'. Takes ownership of
1337 connmgr_broadcast(struct connmgr
*mgr
, struct ofpbuf
*packet
)
1339 struct ofconn
*ofconn
, *prev
;
1342 LIST_FOR_EACH (ofconn
, node
, &mgr
->all_conns
) {
1344 ofconn_send_reply(ofconn
, ofpbuf_clone(packet
));
1346 if (rconn_is_connected(ofconn
->rconn
)) {
1351 ofconn_send_reply(prev
, packet
);
1353 ofpbuf_delete(packet
);
1357 /* In-band configuration. */
1359 static bool any_extras_changed(const struct connmgr
*,
1360 const struct sockaddr_in
*extras
, size_t n
);
1362 /* Sets the 'n' TCP port addresses in 'extras' as ones to which 'mgr''s
1363 * in-band control should guarantee access, in the same way that in-band
1364 * control guarantees access to OpenFlow controllers. */
1366 connmgr_set_extra_in_band_remotes(struct connmgr
*mgr
,
1367 const struct sockaddr_in
*extras
, size_t n
)
1369 if (!any_extras_changed(mgr
, extras
, n
)) {
1373 free(mgr
->extra_in_band_remotes
);
1374 mgr
->n_extra_remotes
= n
;
1375 mgr
->extra_in_band_remotes
= xmemdup(extras
, n
* sizeof *extras
);
1377 update_in_band_remotes(mgr
);
1380 /* Sets the OpenFlow queue used by flows set up by in-band control on
1381 * 'mgr' to 'queue_id'. If 'queue_id' is negative, then in-band control
1382 * flows will use the default queue. */
1384 connmgr_set_in_band_queue(struct connmgr
*mgr
, int queue_id
)
1386 if (queue_id
!= mgr
->in_band_queue
) {
1387 mgr
->in_band_queue
= queue_id
;
1388 update_in_band_remotes(mgr
);
1393 any_extras_changed(const struct connmgr
*mgr
,
1394 const struct sockaddr_in
*extras
, size_t n
)
1398 if (n
!= mgr
->n_extra_remotes
) {
1402 for (i
= 0; i
< n
; i
++) {
1403 const struct sockaddr_in
*old
= &mgr
->extra_in_band_remotes
[i
];
1404 const struct sockaddr_in
*new = &extras
[i
];
1406 if (old
->sin_addr
.s_addr
!= new->sin_addr
.s_addr
||
1407 old
->sin_port
!= new->sin_port
) {
1415 /* In-band implementation. */
1418 connmgr_msg_in_hook(struct connmgr
*mgr
, const struct flow
*flow
,
1419 const struct ofpbuf
*packet
)
1421 return mgr
->in_band
&& in_band_msg_in_hook(mgr
->in_band
, flow
, packet
);
1425 connmgr_may_set_up_flow(struct connmgr
*mgr
, const struct flow
*flow
,
1426 const struct nlattr
*odp_actions
,
1429 return !mgr
->in_band
|| in_band_rule_check(flow
, odp_actions
, actions_len
);
1432 /* Fail-open and in-band implementation. */
1434 /* Called by 'ofproto' after all flows have been flushed, to allow fail-open
1435 * and standalone mode to re-create their flows.
1437 * In-band control has more sophisticated code that manages flows itself. */
1439 connmgr_flushed(struct connmgr
*mgr
)
1441 if (mgr
->fail_open
) {
1442 fail_open_flushed(mgr
->fail_open
);
1445 /* If there are no controllers and we're in standalone mode, set up a flow
1446 * that matches every packet and directs them to OFPP_NORMAL (which goes to
1447 * us). Otherwise, the switch is in secure mode and we won't pass any
1448 * traffic until a controller has been defined and it tells us to do so. */
1449 if (!connmgr_has_controllers(mgr
)
1450 && mgr
->fail_mode
== OFPROTO_FAIL_STANDALONE
) {
1451 union ofp_action action
;
1452 struct cls_rule rule
;
1454 memset(&action
, 0, sizeof action
);
1455 action
.type
= htons(OFPAT_OUTPUT
);
1456 action
.output
.len
= htons(sizeof action
);
1457 action
.output
.port
= htons(OFPP_NORMAL
);
1458 cls_rule_init_catchall(&rule
, 0);
1459 ofproto_add_flow(mgr
->ofproto
, &rule
, &action
, 1);
1463 /* Creates a new ofservice for 'target' in 'mgr'. Returns 0 if successful,
1464 * otherwise a positive errno value.
1466 * ofservice_reconfigure() must be called to fully configure the new
1469 ofservice_create(struct connmgr
*mgr
, const char *target
)
1471 struct ofservice
*ofservice
;
1472 struct pvconn
*pvconn
;
1475 error
= pvconn_open(target
, &pvconn
);
1480 ofservice
= xzalloc(sizeof *ofservice
);
1481 hmap_insert(&mgr
->services
, &ofservice
->node
, hash_string(target
, 0));
1482 ofservice
->pvconn
= pvconn
;
1488 ofservice_destroy(struct connmgr
*mgr
, struct ofservice
*ofservice
)
1490 hmap_remove(&mgr
->services
, &ofservice
->node
);
1491 pvconn_close(ofservice
->pvconn
);
1496 ofservice_reconfigure(struct ofservice
*ofservice
,
1497 const struct ofproto_controller
*c
)
1499 ofservice
->probe_interval
= c
->probe_interval
;
1500 ofservice
->rate_limit
= c
->rate_limit
;
1501 ofservice
->burst_limit
= c
->burst_limit
;
1504 /* Finds and returns the ofservice within 'mgr' that has the given
1505 * 'target', or a null pointer if none exists. */
1506 static struct ofservice
*
1507 ofservice_lookup(struct connmgr
*mgr
, const char *target
)
1509 struct ofservice
*ofservice
;
1511 HMAP_FOR_EACH_WITH_HASH (ofservice
, node
, hash_string(target
, 0),
1513 if (!strcmp(pvconn_get_name(ofservice
->pvconn
), target
)) {