2 * Copyright (c) 2009, 2010, 2011, 2012, 2013 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 "fail-open.h"
28 #include "ofp-actions.h"
32 #include "ofproto-provider.h"
34 #include "poll-loop.h"
44 VLOG_DEFINE_THIS_MODULE(connmgr
);
45 static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(1, 5);
47 /* An OpenFlow connection.
53 * 'ofproto_mutex' must be held whenever an ofconn is created or destroyed or,
54 * more or less equivalently, whenever an ofconn is added to or removed from a
55 * connmgr. 'ofproto_mutex' doesn't protect the data inside the ofconn, except
56 * as specifically noted below. */
58 /* Configuration that persists from one connection to the next. */
60 struct list node
; /* In struct connmgr's "all_conns" list. */
61 struct hmap_node hmap_node
; /* In struct connmgr's "controllers" map. */
63 struct connmgr
*connmgr
; /* Connection's manager. */
64 struct rconn
*rconn
; /* OpenFlow connection. */
65 enum ofconn_type type
; /* Type. */
66 enum ofproto_band band
; /* In-band or out-of-band? */
67 bool enable_async_msgs
; /* Initially enable async messages? */
69 /* State that should be cleared from one connection to the next. */
72 enum ofp12_controller_role role
; /* Role. */
73 enum ofputil_protocol protocol
; /* Current protocol variant. */
74 enum nx_packet_in_format packet_in_format
; /* OFPT_PACKET_IN format. */
76 /* Asynchronous flow table operation support. */
77 struct list opgroups
; /* Contains pending "ofopgroups", if any. */
78 struct ofpbuf
*blocked
; /* Postponed OpenFlow message, if any. */
79 bool retry
; /* True if 'blocked' is ready to try again. */
81 /* OFPT_PACKET_IN related data. */
82 struct rconn_packet_counter
*packet_in_counter
; /* # queued on 'rconn'. */
83 #define N_SCHEDULERS 2
84 struct pinsched
*schedulers
[N_SCHEDULERS
];
85 struct pktbuf
*pktbuf
; /* OpenFlow packet buffers. */
86 int miss_send_len
; /* Bytes to send of buffered packets. */
87 uint16_t controller_id
; /* Connection controller ID. */
89 /* Number of OpenFlow messages queued on 'rconn' as replies to OpenFlow
90 * requests, and the maximum number before we stop reading OpenFlow
92 #define OFCONN_REPLY_MAX 100
93 struct rconn_packet_counter
*reply_counter
;
95 /* Asynchronous message configuration in each possible roles.
97 * A 1-bit enables sending an asynchronous message for one possible reason
98 * that the message might be generated, a 0-bit disables it. */
99 uint32_t master_async_config
[OAM_N_TYPES
]; /* master, other */
100 uint32_t slave_async_config
[OAM_N_TYPES
]; /* slave */
102 /* Flow monitors (e.g. NXST_FLOW_MONITOR). */
104 /* Configuration. Contains "struct ofmonitor"s. */
105 struct hmap monitors
OVS_GUARDED_BY(ofproto_mutex
);
109 * When too many flow monitor notifications back up in the transmit buffer,
110 * we pause the transmission of further notifications. These members track
111 * the flow control state.
113 * When notifications are flowing, 'monitor_paused' is 0. When
114 * notifications are paused, 'monitor_paused' is the value of
115 * 'monitor_seqno' at the point we paused.
117 * 'monitor_counter' counts the OpenFlow messages and bytes currently in
118 * flight. This value growing too large triggers pausing. */
119 uint64_t monitor_paused
OVS_GUARDED_BY(ofproto_mutex
);
120 struct rconn_packet_counter
*monitor_counter
OVS_GUARDED_BY(ofproto_mutex
);
122 /* State of monitors for a single ongoing flow_mod.
124 * 'updates' is a list of "struct ofpbuf"s that contain
125 * NXST_FLOW_MONITOR_REPLY messages representing the changes made by the
128 * When 'updates' is nonempty, 'sent_abbrev_update' is true if 'updates'
129 * contains an update event of type NXFME_ABBREV and false otherwise.. */
130 struct list updates
OVS_GUARDED_BY(ofproto_mutex
);
131 bool sent_abbrev_update
OVS_GUARDED_BY(ofproto_mutex
);
134 static struct ofconn
*ofconn_create(struct connmgr
*, struct rconn
*,
135 enum ofconn_type
, bool enable_async_msgs
)
136 OVS_REQUIRES(ofproto_mutex
);
137 static void ofconn_destroy(struct ofconn
*) OVS_REQUIRES(ofproto_mutex
);
138 static void ofconn_flush(struct ofconn
*) OVS_REQUIRES(ofproto_mutex
);
140 static void ofconn_reconfigure(struct ofconn
*,
141 const struct ofproto_controller
*);
143 static void ofconn_run(struct ofconn
*,
144 bool (*handle_openflow
)(struct ofconn
*,
145 const struct ofpbuf
*ofp_msg
));
146 static void ofconn_wait(struct ofconn
*, bool handling_openflow
);
148 static const char *ofconn_get_target(const struct ofconn
*);
149 static char *ofconn_make_name(const struct connmgr
*, const char *target
);
151 static void ofconn_set_rate_limit(struct ofconn
*, int rate
, int burst
);
153 static void ofconn_send(const struct ofconn
*, struct ofpbuf
*,
154 struct rconn_packet_counter
*);
156 static void do_send_packet_ins(struct ofconn
*, struct list
*txq
);
158 /* A listener for incoming OpenFlow "service" connections. */
160 struct hmap_node node
; /* In struct connmgr's "services" hmap. */
161 struct pvconn
*pvconn
; /* OpenFlow connection listener. */
163 /* These are not used by ofservice directly. They are settings for
164 * accepted "struct ofconn"s from the pvconn. */
165 int probe_interval
; /* Max idle time before probing, in seconds. */
166 int rate_limit
; /* Max packet-in rate in packets per second. */
167 int burst_limit
; /* Limit on accumulating packet credits. */
168 bool enable_async_msgs
; /* Initially enable async messages? */
169 uint8_t dscp
; /* DSCP Value for controller connection */
170 uint32_t allowed_versions
; /* OpenFlow protocol versions that may
171 * be negotiated for a session. */
174 static void ofservice_reconfigure(struct ofservice
*,
175 const struct ofproto_controller
*);
176 static int ofservice_create(struct connmgr
*mgr
, const char *target
,
177 uint32_t allowed_versions
, uint8_t dscp
);
178 static void ofservice_destroy(struct connmgr
*, struct ofservice
*);
179 static struct ofservice
*ofservice_lookup(struct connmgr
*,
182 /* Connection manager for an OpenFlow switch. */
184 struct ofproto
*ofproto
;
186 char *local_port_name
;
188 /* OpenFlow connections. */
189 struct hmap controllers
; /* Controller "struct ofconn"s. */
190 struct list all_conns
; /* Contains "struct ofconn"s. */
191 uint64_t master_election_id
; /* monotonically increasing sequence number
192 * for master election */
193 bool master_election_id_defined
;
195 /* OpenFlow listeners. */
196 struct hmap services
; /* Contains "struct ofservice"s. */
197 struct pvconn
**snoops
;
201 struct fail_open
*fail_open
;
202 enum ofproto_fail_mode fail_mode
;
204 /* In-band control. */
205 struct in_band
*in_band
;
206 struct sockaddr_in
*extra_in_band_remotes
;
207 size_t n_extra_remotes
;
211 static void update_in_band_remotes(struct connmgr
*);
212 static void add_snooper(struct connmgr
*, struct vconn
*);
213 static void ofmonitor_run(struct connmgr
*);
214 static void ofmonitor_wait(struct connmgr
*);
216 /* Creates and returns a new connection manager owned by 'ofproto'. 'name' is
217 * a name for the ofproto suitable for using in log messages.
218 * 'local_port_name' is the name of the local port (OFPP_LOCAL) within
221 connmgr_create(struct ofproto
*ofproto
,
222 const char *name
, const char *local_port_name
)
226 mgr
= xmalloc(sizeof *mgr
);
227 mgr
->ofproto
= ofproto
;
228 mgr
->name
= xstrdup(name
);
229 mgr
->local_port_name
= xstrdup(local_port_name
);
231 hmap_init(&mgr
->controllers
);
232 list_init(&mgr
->all_conns
);
233 mgr
->master_election_id
= 0;
234 mgr
->master_election_id_defined
= false;
236 hmap_init(&mgr
->services
);
240 mgr
->fail_open
= NULL
;
241 mgr
->fail_mode
= OFPROTO_FAIL_SECURE
;
244 mgr
->extra_in_band_remotes
= NULL
;
245 mgr
->n_extra_remotes
= 0;
246 mgr
->in_band_queue
= -1;
251 /* Frees 'mgr' and all of its resources. */
253 connmgr_destroy(struct connmgr
*mgr
)
255 struct ofservice
*ofservice
, *next_ofservice
;
256 struct ofconn
*ofconn
, *next_ofconn
;
263 ovs_mutex_lock(&ofproto_mutex
);
264 LIST_FOR_EACH_SAFE (ofconn
, next_ofconn
, node
, &mgr
->all_conns
) {
265 ofconn_destroy(ofconn
);
267 ovs_mutex_unlock(&ofproto_mutex
);
269 hmap_destroy(&mgr
->controllers
);
271 HMAP_FOR_EACH_SAFE (ofservice
, next_ofservice
, node
, &mgr
->services
) {
272 ofservice_destroy(mgr
, ofservice
);
274 hmap_destroy(&mgr
->services
);
276 for (i
= 0; i
< mgr
->n_snoops
; i
++) {
277 pvconn_close(mgr
->snoops
[i
]);
281 fail_open_destroy(mgr
->fail_open
);
282 mgr
->fail_open
= NULL
;
284 in_band_destroy(mgr
->in_band
);
286 free(mgr
->extra_in_band_remotes
);
288 free(mgr
->local_port_name
);
293 /* Does all of the periodic maintenance required by 'mgr'.
295 * If 'handle_openflow' is nonnull, calls 'handle_openflow' for each message
296 * received on an OpenFlow connection, passing along the OpenFlow connection
297 * itself and the message that was sent. If 'handle_openflow' returns true,
298 * the message is considered to be fully processed. If 'handle_openflow'
299 * returns false, the message is considered not to have been processed at all;
300 * it will be stored and re-presented to 'handle_openflow' following the next
301 * call to connmgr_retry(). 'handle_openflow' must not modify or free the
304 * If 'handle_openflow' is NULL, no OpenFlow messages will be processed and
305 * other activities that could affect the flow table (in-band processing,
306 * fail-open processing) are suppressed too. */
308 connmgr_run(struct connmgr
*mgr
,
309 bool (*handle_openflow
)(struct ofconn
*,
310 const struct ofpbuf
*ofp_msg
))
311 OVS_EXCLUDED(ofproto_mutex
)
313 struct ofconn
*ofconn
, *next_ofconn
;
314 struct ofservice
*ofservice
;
317 if (handle_openflow
&& mgr
->in_band
) {
318 if (!in_band_run(mgr
->in_band
)) {
319 in_band_destroy(mgr
->in_band
);
324 LIST_FOR_EACH_SAFE (ofconn
, next_ofconn
, node
, &mgr
->all_conns
) {
325 ofconn_run(ofconn
, handle_openflow
);
329 /* Fail-open maintenance. Do this after processing the ofconns since
330 * fail-open checks the status of the controller rconn. */
331 if (handle_openflow
&& mgr
->fail_open
) {
332 fail_open_run(mgr
->fail_open
);
335 HMAP_FOR_EACH (ofservice
, node
, &mgr
->services
) {
339 retval
= pvconn_accept(ofservice
->pvconn
, &vconn
);
344 /* Passing default value for creation of the rconn */
345 rconn
= rconn_create(ofservice
->probe_interval
, 0, ofservice
->dscp
,
346 vconn_get_allowed_versions(vconn
));
347 name
= ofconn_make_name(mgr
, vconn_get_name(vconn
));
348 rconn_connect_unreliably(rconn
, vconn
, name
);
351 ovs_mutex_lock(&ofproto_mutex
);
352 ofconn
= ofconn_create(mgr
, rconn
, OFCONN_SERVICE
,
353 ofservice
->enable_async_msgs
);
354 ovs_mutex_unlock(&ofproto_mutex
);
356 ofconn_set_rate_limit(ofconn
, ofservice
->rate_limit
,
357 ofservice
->burst_limit
);
358 } else if (retval
!= EAGAIN
) {
359 VLOG_WARN_RL(&rl
, "accept failed (%s)", ovs_strerror(retval
));
363 for (i
= 0; i
< mgr
->n_snoops
; i
++) {
367 retval
= pvconn_accept(mgr
->snoops
[i
], &vconn
);
369 add_snooper(mgr
, vconn
);
370 } else if (retval
!= EAGAIN
) {
371 VLOG_WARN_RL(&rl
, "accept failed (%s)", ovs_strerror(retval
));
376 /* Causes the poll loop to wake up when connmgr_run() needs to run.
378 * If 'handling_openflow' is true, arriving OpenFlow messages and other
379 * activities that affect the flow table will wake up the poll loop. If
380 * 'handling_openflow' is false, they will not. */
382 connmgr_wait(struct connmgr
*mgr
, bool handling_openflow
)
384 struct ofservice
*ofservice
;
385 struct ofconn
*ofconn
;
388 LIST_FOR_EACH (ofconn
, node
, &mgr
->all_conns
) {
389 ofconn_wait(ofconn
, handling_openflow
);
392 if (handling_openflow
&& mgr
->in_band
) {
393 in_band_wait(mgr
->in_band
);
395 if (handling_openflow
&& mgr
->fail_open
) {
396 fail_open_wait(mgr
->fail_open
);
398 HMAP_FOR_EACH (ofservice
, node
, &mgr
->services
) {
399 pvconn_wait(ofservice
->pvconn
);
401 for (i
= 0; i
< mgr
->n_snoops
; i
++) {
402 pvconn_wait(mgr
->snoops
[i
]);
406 /* Adds some memory usage statistics for 'mgr' into 'usage', for use with
407 * memory_report(). */
409 connmgr_get_memory_usage(const struct connmgr
*mgr
, struct simap
*usage
)
411 const struct ofconn
*ofconn
;
412 unsigned int packets
= 0;
413 unsigned int ofconns
= 0;
415 LIST_FOR_EACH (ofconn
, node
, &mgr
->all_conns
) {
420 packets
+= rconn_count_txqlen(ofconn
->rconn
);
421 for (i
= 0; i
< N_SCHEDULERS
; i
++) {
422 packets
+= pinsched_count_txqlen(ofconn
->schedulers
[i
]);
424 packets
+= pktbuf_count_packets(ofconn
->pktbuf
);
426 simap_increase(usage
, "ofconns", ofconns
);
427 simap_increase(usage
, "packets", packets
);
430 /* Returns the ofproto that owns 'ofconn''s connmgr. */
432 ofconn_get_ofproto(const struct ofconn
*ofconn
)
434 return ofconn
->connmgr
->ofproto
;
437 /* If processing of OpenFlow messages was blocked on any 'mgr' ofconns by
438 * returning false to the 'handle_openflow' callback to connmgr_run(), this
439 * re-enables them. */
441 connmgr_retry(struct connmgr
*mgr
)
443 struct ofconn
*ofconn
;
445 LIST_FOR_EACH (ofconn
, node
, &mgr
->all_conns
) {
446 ofconn
->retry
= true;
450 /* OpenFlow configuration. */
452 static void add_controller(struct connmgr
*, const char *target
, uint8_t dscp
,
453 uint32_t allowed_versions
)
454 OVS_REQUIRES(ofproto_mutex
);
455 static struct ofconn
*find_controller_by_target(struct connmgr
*,
457 static void update_fail_open(struct connmgr
*);
458 static int set_pvconns(struct pvconn
***pvconnsp
, size_t *n_pvconnsp
,
459 const struct sset
*);
461 /* Returns true if 'mgr' has any configured primary controllers.
463 * Service controllers do not count, but configured primary controllers do
464 * count whether or not they are currently connected. */
466 connmgr_has_controllers(const struct connmgr
*mgr
)
468 return !hmap_is_empty(&mgr
->controllers
);
471 /* Initializes 'info' and populates it with information about each configured
472 * primary controller. The keys in 'info' are the controllers' targets; the
473 * data values are corresponding "struct ofproto_controller_info".
475 * The caller owns 'info' and everything in it and should free it when it is no
478 connmgr_get_controller_info(struct connmgr
*mgr
, struct shash
*info
)
480 const struct ofconn
*ofconn
;
482 HMAP_FOR_EACH (ofconn
, hmap_node
, &mgr
->controllers
) {
483 const struct rconn
*rconn
= ofconn
->rconn
;
484 const char *target
= rconn_get_target(rconn
);
486 if (!shash_find(info
, target
)) {
487 struct ofproto_controller_info
*cinfo
= xmalloc(sizeof *cinfo
);
488 time_t now
= time_now();
489 time_t last_connection
= rconn_get_last_connection(rconn
);
490 time_t last_disconnect
= rconn_get_last_disconnect(rconn
);
491 int last_error
= rconn_get_last_error(rconn
);
493 shash_add(info
, target
, cinfo
);
495 cinfo
->is_connected
= rconn_is_connected(rconn
);
496 cinfo
->role
= ofconn
->role
;
501 cinfo
->pairs
.keys
[cinfo
->pairs
.n
] = "last_error";
502 cinfo
->pairs
.values
[cinfo
->pairs
.n
++]
503 = xstrdup(ovs_retval_to_string(last_error
));
506 cinfo
->pairs
.keys
[cinfo
->pairs
.n
] = "state";
507 cinfo
->pairs
.values
[cinfo
->pairs
.n
++]
508 = xstrdup(rconn_get_state(rconn
));
510 if (last_connection
!= TIME_MIN
) {
511 cinfo
->pairs
.keys
[cinfo
->pairs
.n
] = "sec_since_connect";
512 cinfo
->pairs
.values
[cinfo
->pairs
.n
++]
513 = xasprintf("%ld", (long int) (now
- last_connection
));
516 if (last_disconnect
!= TIME_MIN
) {
517 cinfo
->pairs
.keys
[cinfo
->pairs
.n
] = "sec_since_disconnect";
518 cinfo
->pairs
.values
[cinfo
->pairs
.n
++]
519 = xasprintf("%ld", (long int) (now
- last_disconnect
));
526 connmgr_free_controller_info(struct shash
*info
)
528 struct shash_node
*node
;
530 SHASH_FOR_EACH (node
, info
) {
531 struct ofproto_controller_info
*cinfo
= node
->data
;
532 while (cinfo
->pairs
.n
) {
533 free(CONST_CAST(char *, cinfo
->pairs
.values
[--cinfo
->pairs
.n
]));
540 /* Changes 'mgr''s set of controllers to the 'n_controllers' controllers in
543 connmgr_set_controllers(struct connmgr
*mgr
,
544 const struct ofproto_controller
*controllers
,
545 size_t n_controllers
, uint32_t allowed_versions
)
546 OVS_EXCLUDED(ofproto_mutex
)
548 bool had_controllers
= connmgr_has_controllers(mgr
);
549 struct shash new_controllers
;
550 struct ofconn
*ofconn
, *next_ofconn
;
551 struct ofservice
*ofservice
, *next_ofservice
;
554 /* Required to add and remove ofconns. This could probably be narrowed to
555 * cover a smaller amount of code, if that yielded some benefit. */
556 ovs_mutex_lock(&ofproto_mutex
);
558 /* Create newly configured controllers and services.
559 * Create a name to ofproto_controller mapping in 'new_controllers'. */
560 shash_init(&new_controllers
);
561 for (i
= 0; i
< n_controllers
; i
++) {
562 const struct ofproto_controller
*c
= &controllers
[i
];
564 if (!vconn_verify_name(c
->target
)) {
566 ofconn
= find_controller_by_target(mgr
, c
->target
);
568 VLOG_INFO("%s: added primary controller \"%s\"",
569 mgr
->name
, c
->target
);
571 } else if (rconn_get_allowed_versions(ofconn
->rconn
) !=
573 VLOG_INFO("%s: re-added primary controller \"%s\"",
574 mgr
->name
, c
->target
);
576 ofconn_destroy(ofconn
);
579 add_controller(mgr
, c
->target
, c
->dscp
, allowed_versions
);
581 } else if (!pvconn_verify_name(c
->target
)) {
583 ofservice
= ofservice_lookup(mgr
, c
->target
);
585 VLOG_INFO("%s: added service controller \"%s\"",
586 mgr
->name
, c
->target
);
588 } else if (ofservice
->allowed_versions
!= allowed_versions
) {
589 VLOG_INFO("%s: re-added service controller \"%s\"",
590 mgr
->name
, c
->target
);
591 ofservice_destroy(mgr
, ofservice
);
595 ofservice_create(mgr
, c
->target
, allowed_versions
, c
->dscp
);
598 VLOG_WARN_RL(&rl
, "%s: unsupported controller \"%s\"",
599 mgr
->name
, c
->target
);
603 shash_add_once(&new_controllers
, c
->target
, &controllers
[i
]);
606 /* Delete controllers that are no longer configured.
607 * Update configuration of all now-existing controllers. */
608 HMAP_FOR_EACH_SAFE (ofconn
, next_ofconn
, hmap_node
, &mgr
->controllers
) {
609 const char *target
= ofconn_get_target(ofconn
);
610 struct ofproto_controller
*c
;
612 c
= shash_find_data(&new_controllers
, target
);
614 VLOG_INFO("%s: removed primary controller \"%s\"",
616 ofconn_destroy(ofconn
);
618 ofconn_reconfigure(ofconn
, c
);
622 /* Delete services that are no longer configured.
623 * Update configuration of all now-existing services. */
624 HMAP_FOR_EACH_SAFE (ofservice
, next_ofservice
, node
, &mgr
->services
) {
625 const char *target
= pvconn_get_name(ofservice
->pvconn
);
626 struct ofproto_controller
*c
;
628 c
= shash_find_data(&new_controllers
, target
);
630 VLOG_INFO("%s: removed service controller \"%s\"",
632 ofservice_destroy(mgr
, ofservice
);
634 ofservice_reconfigure(ofservice
, c
);
638 shash_destroy(&new_controllers
);
640 ovs_mutex_unlock(&ofproto_mutex
);
642 update_in_band_remotes(mgr
);
643 update_fail_open(mgr
);
644 if (had_controllers
!= connmgr_has_controllers(mgr
)) {
645 ofproto_flush_flows(mgr
->ofproto
);
649 /* Drops the connections between 'mgr' and all of its primary and secondary
650 * controllers, forcing them to reconnect. */
652 connmgr_reconnect(const struct connmgr
*mgr
)
654 struct ofconn
*ofconn
;
656 LIST_FOR_EACH (ofconn
, node
, &mgr
->all_conns
) {
657 rconn_reconnect(ofconn
->rconn
);
661 /* Sets the "snoops" for 'mgr' to the pvconn targets listed in 'snoops'.
663 * A "snoop" is a pvconn to which every OpenFlow message to or from the most
664 * important controller on 'mgr' is mirrored. */
666 connmgr_set_snoops(struct connmgr
*mgr
, const struct sset
*snoops
)
668 return set_pvconns(&mgr
->snoops
, &mgr
->n_snoops
, snoops
);
671 /* Adds each of the snoops currently configured on 'mgr' to 'snoops'. */
673 connmgr_get_snoops(const struct connmgr
*mgr
, struct sset
*snoops
)
677 for (i
= 0; i
< mgr
->n_snoops
; i
++) {
678 sset_add(snoops
, pvconn_get_name(mgr
->snoops
[i
]));
682 /* Returns true if 'mgr' has at least one snoop, false if it has none. */
684 connmgr_has_snoops(const struct connmgr
*mgr
)
686 return mgr
->n_snoops
> 0;
689 /* Creates a new controller for 'target' in 'mgr'. update_controller() needs
690 * to be called later to finish the new ofconn's configuration. */
692 add_controller(struct connmgr
*mgr
, const char *target
, uint8_t dscp
,
693 uint32_t allowed_versions
)
694 OVS_REQUIRES(ofproto_mutex
)
696 char *name
= ofconn_make_name(mgr
, target
);
697 struct ofconn
*ofconn
;
699 ofconn
= ofconn_create(mgr
, rconn_create(5, 8, dscp
, allowed_versions
),
700 OFCONN_PRIMARY
, true);
701 ofconn
->pktbuf
= pktbuf_create();
702 rconn_connect(ofconn
->rconn
, target
, name
);
703 hmap_insert(&mgr
->controllers
, &ofconn
->hmap_node
, hash_string(target
, 0));
708 static struct ofconn
*
709 find_controller_by_target(struct connmgr
*mgr
, const char *target
)
711 struct ofconn
*ofconn
;
713 HMAP_FOR_EACH_WITH_HASH (ofconn
, hmap_node
,
714 hash_string(target
, 0), &mgr
->controllers
) {
715 if (!strcmp(ofconn_get_target(ofconn
), target
)) {
723 update_in_band_remotes(struct connmgr
*mgr
)
725 struct sockaddr_in
*addrs
;
726 size_t max_addrs
, n_addrs
;
727 struct ofconn
*ofconn
;
730 /* Allocate enough memory for as many remotes as we could possibly have. */
731 max_addrs
= mgr
->n_extra_remotes
+ hmap_count(&mgr
->controllers
);
732 addrs
= xmalloc(max_addrs
* sizeof *addrs
);
735 /* Add all the remotes. */
736 HMAP_FOR_EACH (ofconn
, hmap_node
, &mgr
->controllers
) {
737 struct sockaddr_in
*sin
= &addrs
[n_addrs
];
738 const char *target
= rconn_get_target(ofconn
->rconn
);
740 if (ofconn
->band
== OFPROTO_OUT_OF_BAND
) {
744 if (stream_parse_target_with_default_port(target
,
750 for (i
= 0; i
< mgr
->n_extra_remotes
; i
++) {
751 addrs
[n_addrs
++] = mgr
->extra_in_band_remotes
[i
];
754 /* Create or update or destroy in-band. */
757 in_band_create(mgr
->ofproto
, mgr
->local_port_name
, &mgr
->in_band
);
759 in_band_set_queue(mgr
->in_band
, mgr
->in_band_queue
);
761 /* in_band_run() needs a chance to delete any existing in-band flows.
762 * We will destroy mgr->in_band after it's done with that. */
765 in_band_set_remotes(mgr
->in_band
, addrs
, n_addrs
);
773 update_fail_open(struct connmgr
*mgr
)
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
);
931 /* Changes 'ofconn''s role to 'role'. If 'role' is OFPCR12_ROLE_MASTER then
932 * any existing master is demoted to a slave. */
934 ofconn_set_role(struct ofconn
*ofconn
, enum ofp12_controller_role role
)
936 if (role
!= ofconn
->role
&& role
== OFPCR12_ROLE_MASTER
) {
937 struct ofconn
*other
;
939 HMAP_FOR_EACH (other
, hmap_node
, &ofconn
->connmgr
->controllers
) {
940 if (other
->role
== OFPCR12_ROLE_MASTER
) {
941 other
->role
= OFPCR12_ROLE_SLAVE
;
942 ofconn_send_role_status(other
, OFPCR12_ROLE_SLAVE
, OFPCRR_MASTER_REQUEST
);
950 ofconn_set_invalid_ttl_to_controller(struct ofconn
*ofconn
, bool enable
)
952 uint32_t bit
= 1u << OFPR_INVALID_TTL
;
954 ofconn
->master_async_config
[OAM_PACKET_IN
] |= bit
;
956 ofconn
->master_async_config
[OAM_PACKET_IN
] &= ~bit
;
961 ofconn_get_invalid_ttl_to_controller(struct ofconn
*ofconn
)
963 uint32_t bit
= 1u << OFPR_INVALID_TTL
;
964 return (ofconn
->master_async_config
[OAM_PACKET_IN
] & bit
) != 0;
967 /* Returns the currently configured protocol for 'ofconn', one of OFPUTIL_P_*.
969 * Returns OFPUTIL_P_NONE, which is not a valid protocol, if 'ofconn' hasn't
970 * completed version negotiation. This can't happen if at least one OpenFlow
971 * message, other than OFPT_HELLO, has been received on the connection (such as
972 * in ofproto.c's message handling code), since version negotiation is a
973 * prerequisite for starting to receive messages. This means that
974 * OFPUTIL_P_NONE is a special case that most callers need not worry about. */
975 enum ofputil_protocol
976 ofconn_get_protocol(const struct ofconn
*ofconn
)
978 if (ofconn
->protocol
== OFPUTIL_P_NONE
&&
979 rconn_is_connected(ofconn
->rconn
)) {
980 int version
= rconn_get_version(ofconn
->rconn
);
982 ofconn_set_protocol(CONST_CAST(struct ofconn
*, ofconn
),
983 ofputil_protocol_from_ofp_version(version
));
987 return ofconn
->protocol
;
990 /* Sets the protocol for 'ofconn' to 'protocol' (one of OFPUTIL_P_*).
992 * (This doesn't actually send anything to accomplish this. Presumably the
993 * caller already did that.) */
995 ofconn_set_protocol(struct ofconn
*ofconn
, enum ofputil_protocol protocol
)
997 ofconn
->protocol
= protocol
;
1000 /* Returns the currently configured packet in format for 'ofconn', one of
1003 * The default, if no other format has been set, is NXPIF_OPENFLOW10. */
1004 enum nx_packet_in_format
1005 ofconn_get_packet_in_format(struct ofconn
*ofconn
)
1007 return ofconn
->packet_in_format
;
1010 /* Sets the packet in format for 'ofconn' to 'packet_in_format' (one of
1013 ofconn_set_packet_in_format(struct ofconn
*ofconn
,
1014 enum nx_packet_in_format packet_in_format
)
1016 ofconn
->packet_in_format
= packet_in_format
;
1019 /* Sets the controller connection ID for 'ofconn' to 'controller_id'.
1021 * The connection controller ID is used for OFPP_CONTROLLER and
1022 * NXAST_CONTROLLER actions. See "struct nx_action_controller" for details. */
1024 ofconn_set_controller_id(struct ofconn
*ofconn
, uint16_t controller_id
)
1026 ofconn
->controller_id
= controller_id
;
1029 /* Returns the default miss send length for 'ofconn'. */
1031 ofconn_get_miss_send_len(const struct ofconn
*ofconn
)
1033 return ofconn
->miss_send_len
;
1036 /* Sets the default miss send length for 'ofconn' to 'miss_send_len'. */
1038 ofconn_set_miss_send_len(struct ofconn
*ofconn
, int miss_send_len
)
1040 ofconn
->miss_send_len
= miss_send_len
;
1044 ofconn_set_async_config(struct ofconn
*ofconn
,
1045 const uint32_t master_masks
[OAM_N_TYPES
],
1046 const uint32_t slave_masks
[OAM_N_TYPES
])
1048 size_t size
= sizeof ofconn
->master_async_config
;
1049 memcpy(ofconn
->master_async_config
, master_masks
, size
);
1050 memcpy(ofconn
->slave_async_config
, slave_masks
, size
);
1054 ofconn_get_async_config(struct ofconn
*ofconn
,
1055 uint32_t *master_masks
, uint32_t *slave_masks
)
1057 size_t size
= sizeof ofconn
->master_async_config
;
1058 memcpy(master_masks
, ofconn
->master_async_config
, size
);
1059 memcpy(slave_masks
, ofconn
->slave_async_config
, size
);
1062 /* Sends 'msg' on 'ofconn', accounting it as a reply. (If there is a
1063 * sufficient number of OpenFlow replies in-flight on a single ofconn, then the
1064 * connmgr will stop accepting new OpenFlow requests on that ofconn until the
1065 * controller has accepted some of the replies.) */
1067 ofconn_send_reply(const struct ofconn
*ofconn
, struct ofpbuf
*msg
)
1069 ofconn_send(ofconn
, msg
, ofconn
->reply_counter
);
1072 /* Sends each of the messages in list 'replies' on 'ofconn' in order,
1073 * accounting them as replies. */
1075 ofconn_send_replies(const struct ofconn
*ofconn
, struct list
*replies
)
1077 struct ofpbuf
*reply
, *next
;
1079 LIST_FOR_EACH_SAFE (reply
, next
, list_node
, replies
) {
1080 list_remove(&reply
->list_node
);
1081 ofconn_send_reply(ofconn
, reply
);
1085 /* Sends 'error' on 'ofconn', as a reply to 'request'. Only at most the
1086 * first 64 bytes of 'request' are used. */
1088 ofconn_send_error(const struct ofconn
*ofconn
,
1089 const struct ofp_header
*request
, enum ofperr error
)
1091 static struct vlog_rate_limit err_rl
= VLOG_RATE_LIMIT_INIT(10, 10);
1092 struct ofpbuf
*reply
;
1094 reply
= ofperr_encode_reply(error
, request
);
1095 if (!VLOG_DROP_INFO(&err_rl
)) {
1096 const char *type_name
;
1100 request_len
= ntohs(request
->length
);
1101 type_name
= (!ofpraw_decode_partial(&raw
, request
,
1102 MIN(64, request_len
))
1103 ? ofpraw_get_name(raw
)
1106 VLOG_INFO("%s: sending %s error reply to %s message",
1107 rconn_get_name(ofconn
->rconn
), ofperr_to_string(error
),
1110 ofconn_send_reply(ofconn
, reply
);
1113 /* Same as pktbuf_retrieve(), using the pktbuf owned by 'ofconn'. */
1115 ofconn_pktbuf_retrieve(struct ofconn
*ofconn
, uint32_t id
,
1116 struct ofpbuf
**bufferp
, ofp_port_t
*in_port
)
1118 return pktbuf_retrieve(ofconn
->pktbuf
, id
, bufferp
, in_port
);
1121 /* Returns true if 'ofconn' has any pending opgroups. */
1123 ofconn_has_pending_opgroups(const struct ofconn
*ofconn
)
1125 return !list_is_empty(&ofconn
->opgroups
);
1128 /* Adds 'ofconn_node' to 'ofconn''s list of pending opgroups.
1130 * If 'ofconn' is destroyed or its connection drops, then 'ofconn' will remove
1131 * 'ofconn_node' from the list and re-initialize it with list_init(). The
1132 * client may, therefore, use list_is_empty(ofconn_node) to determine whether
1133 * 'ofconn_node' is still associated with an active ofconn.
1135 * The client may also remove ofconn_node from the list itself, with
1138 ofconn_add_opgroup(struct ofconn
*ofconn
, struct list
*ofconn_node
)
1140 list_push_back(&ofconn
->opgroups
, ofconn_node
);
1143 /* Private ofconn functions. */
1146 ofconn_get_target(const struct ofconn
*ofconn
)
1148 return rconn_get_target(ofconn
->rconn
);
1151 static struct ofconn
*
1152 ofconn_create(struct connmgr
*mgr
, struct rconn
*rconn
, enum ofconn_type type
,
1153 bool enable_async_msgs
)
1155 struct ofconn
*ofconn
;
1157 ofconn
= xzalloc(sizeof *ofconn
);
1158 ofconn
->connmgr
= mgr
;
1159 list_push_back(&mgr
->all_conns
, &ofconn
->node
);
1160 ofconn
->rconn
= rconn
;
1161 ofconn
->type
= type
;
1162 ofconn
->enable_async_msgs
= enable_async_msgs
;
1164 list_init(&ofconn
->opgroups
);
1166 hmap_init(&ofconn
->monitors
);
1167 list_init(&ofconn
->updates
);
1169 ofconn_flush(ofconn
);
1174 /* Clears all of the state in 'ofconn' that should not persist from one
1175 * connection to the next. */
1177 ofconn_flush(struct ofconn
*ofconn
)
1178 OVS_REQUIRES(ofproto_mutex
)
1180 struct ofmonitor
*monitor
, *next_monitor
;
1183 ofconn
->role
= OFPCR12_ROLE_EQUAL
;
1184 ofconn_set_protocol(ofconn
, OFPUTIL_P_NONE
);
1185 ofconn
->packet_in_format
= NXPIF_OPENFLOW10
;
1187 /* Disassociate 'ofconn' from all of the ofopgroups that it initiated that
1188 * have not yet completed. (Those ofopgroups will still run to completion
1189 * in the usual way, but any errors that they run into will not be reported
1190 * on any OpenFlow channel.)
1192 * Also discard any blocked operation on 'ofconn'. */
1193 while (!list_is_empty(&ofconn
->opgroups
)) {
1194 list_init(list_pop_front(&ofconn
->opgroups
));
1196 ofpbuf_delete(ofconn
->blocked
);
1197 ofconn
->blocked
= NULL
;
1199 rconn_packet_counter_destroy(ofconn
->packet_in_counter
);
1200 ofconn
->packet_in_counter
= rconn_packet_counter_create();
1201 for (i
= 0; i
< N_SCHEDULERS
; i
++) {
1202 if (ofconn
->schedulers
[i
]) {
1205 pinsched_get_limits(ofconn
->schedulers
[i
], &rate
, &burst
);
1206 pinsched_destroy(ofconn
->schedulers
[i
]);
1207 ofconn
->schedulers
[i
] = pinsched_create(rate
, burst
);
1210 if (ofconn
->pktbuf
) {
1211 pktbuf_destroy(ofconn
->pktbuf
);
1212 ofconn
->pktbuf
= pktbuf_create();
1214 ofconn
->miss_send_len
= (ofconn
->type
== OFCONN_PRIMARY
1215 ? OFP_DEFAULT_MISS_SEND_LEN
1217 ofconn
->controller_id
= 0;
1219 rconn_packet_counter_destroy(ofconn
->reply_counter
);
1220 ofconn
->reply_counter
= rconn_packet_counter_create();
1222 if (ofconn
->enable_async_msgs
) {
1223 uint32_t *master
= ofconn
->master_async_config
;
1224 uint32_t *slave
= ofconn
->slave_async_config
;
1226 /* "master" and "other" roles get all asynchronous messages by default,
1227 * except that the controller needs to enable nonstandard "packet-in"
1228 * reasons itself. */
1229 master
[OAM_PACKET_IN
] = (1u << OFPR_NO_MATCH
) | (1u << OFPR_ACTION
);
1230 master
[OAM_PORT_STATUS
] = ((1u << OFPPR_ADD
)
1231 | (1u << OFPPR_DELETE
)
1232 | (1u << OFPPR_MODIFY
));
1233 master
[OAM_FLOW_REMOVED
] = ((1u << OFPRR_IDLE_TIMEOUT
)
1234 | (1u << OFPRR_HARD_TIMEOUT
)
1235 | (1u << OFPRR_DELETE
));
1237 /* "slave" role gets port status updates by default. */
1238 slave
[OAM_PACKET_IN
] = 0;
1239 slave
[OAM_PORT_STATUS
] = ((1u << OFPPR_ADD
)
1240 | (1u << OFPPR_DELETE
)
1241 | (1u << OFPPR_MODIFY
));
1242 slave
[OAM_FLOW_REMOVED
] = 0;
1244 memset(ofconn
->master_async_config
, 0,
1245 sizeof ofconn
->master_async_config
);
1246 memset(ofconn
->slave_async_config
, 0,
1247 sizeof ofconn
->slave_async_config
);
1250 HMAP_FOR_EACH_SAFE (monitor
, next_monitor
, ofconn_node
,
1251 &ofconn
->monitors
) {
1252 ofmonitor_destroy(monitor
);
1254 rconn_packet_counter_destroy(ofconn
->monitor_counter
);
1255 ofconn
->monitor_counter
= rconn_packet_counter_create();
1256 ofpbuf_list_delete(&ofconn
->updates
); /* ...but it should be empty. */
1260 ofconn_destroy(struct ofconn
*ofconn
)
1261 OVS_REQUIRES(ofproto_mutex
)
1263 ofconn_flush(ofconn
);
1265 if (ofconn
->type
== OFCONN_PRIMARY
) {
1266 hmap_remove(&ofconn
->connmgr
->controllers
, &ofconn
->hmap_node
);
1269 hmap_destroy(&ofconn
->monitors
);
1270 list_remove(&ofconn
->node
);
1271 rconn_destroy(ofconn
->rconn
);
1272 rconn_packet_counter_destroy(ofconn
->packet_in_counter
);
1273 rconn_packet_counter_destroy(ofconn
->reply_counter
);
1274 pktbuf_destroy(ofconn
->pktbuf
);
1275 rconn_packet_counter_destroy(ofconn
->monitor_counter
);
1279 /* Reconfigures 'ofconn' to match 'c'. 'ofconn' and 'c' must have the same
1282 ofconn_reconfigure(struct ofconn
*ofconn
, const struct ofproto_controller
*c
)
1286 ofconn
->band
= c
->band
;
1287 ofconn
->enable_async_msgs
= c
->enable_async_msgs
;
1289 rconn_set_max_backoff(ofconn
->rconn
, c
->max_backoff
);
1291 probe_interval
= c
->probe_interval
? MAX(c
->probe_interval
, 5) : 0;
1292 rconn_set_probe_interval(ofconn
->rconn
, probe_interval
);
1294 ofconn_set_rate_limit(ofconn
, c
->rate_limit
, c
->burst_limit
);
1296 /* If dscp value changed reconnect. */
1297 if (c
->dscp
!= rconn_get_dscp(ofconn
->rconn
)) {
1298 rconn_set_dscp(ofconn
->rconn
, c
->dscp
);
1299 rconn_reconnect(ofconn
->rconn
);
1303 /* Returns true if it makes sense for 'ofconn' to receive and process OpenFlow
1306 ofconn_may_recv(const struct ofconn
*ofconn
)
1308 int count
= rconn_packet_counter_n_packets(ofconn
->reply_counter
);
1309 return (!ofconn
->blocked
|| ofconn
->retry
) && count
< OFCONN_REPLY_MAX
;
1313 ofconn_run(struct ofconn
*ofconn
,
1314 bool (*handle_openflow
)(struct ofconn
*,
1315 const struct ofpbuf
*ofp_msg
))
1317 struct connmgr
*mgr
= ofconn
->connmgr
;
1320 for (i
= 0; i
< N_SCHEDULERS
; i
++) {
1323 pinsched_run(ofconn
->schedulers
[i
], &txq
);
1324 do_send_packet_ins(ofconn
, &txq
);
1327 rconn_run(ofconn
->rconn
);
1329 if (handle_openflow
) {
1330 /* Limit the number of iterations to avoid starving other tasks. */
1331 for (i
= 0; i
< 50 && ofconn_may_recv(ofconn
); i
++) {
1332 struct ofpbuf
*of_msg
;
1334 of_msg
= (ofconn
->blocked
1336 : rconn_recv(ofconn
->rconn
));
1340 if (mgr
->fail_open
) {
1341 fail_open_maybe_recover(mgr
->fail_open
);
1344 if (handle_openflow(ofconn
, of_msg
)) {
1345 ofpbuf_delete(of_msg
);
1346 ofconn
->blocked
= NULL
;
1348 ofconn
->blocked
= of_msg
;
1349 ofconn
->retry
= false;
1354 ovs_mutex_lock(&ofproto_mutex
);
1355 if (!rconn_is_alive(ofconn
->rconn
)) {
1356 ofconn_destroy(ofconn
);
1357 } else if (!rconn_is_connected(ofconn
->rconn
)) {
1358 ofconn_flush(ofconn
);
1360 ovs_mutex_unlock(&ofproto_mutex
);
1364 ofconn_wait(struct ofconn
*ofconn
, bool handling_openflow
)
1368 for (i
= 0; i
< N_SCHEDULERS
; i
++) {
1369 pinsched_wait(ofconn
->schedulers
[i
]);
1371 rconn_run_wait(ofconn
->rconn
);
1372 if (handling_openflow
&& ofconn_may_recv(ofconn
)) {
1373 rconn_recv_wait(ofconn
->rconn
);
1377 /* Returns true if 'ofconn' should receive asynchronous messages of the given
1378 * OAM_* 'type' and 'reason', which should be a OFPR_* value for OAM_PACKET_IN,
1379 * a OFPPR_* value for OAM_PORT_STATUS, or an OFPRR_* value for
1380 * OAM_FLOW_REMOVED. Returns false if the message should not be sent on
1383 ofconn_receives_async_msg(const struct ofconn
*ofconn
,
1384 enum ofconn_async_msg_type type
,
1385 unsigned int reason
)
1387 const uint32_t *async_config
;
1389 ovs_assert(reason
< 32);
1390 ovs_assert((unsigned int) type
< OAM_N_TYPES
);
1392 if (ofconn_get_protocol(ofconn
) == OFPUTIL_P_NONE
1393 || !rconn_is_connected(ofconn
->rconn
)) {
1397 /* Keep the following code in sync with the documentation in the
1398 * "Asynchronous Messages" section in DESIGN. */
1400 if (ofconn
->type
== OFCONN_SERVICE
&& !ofconn
->miss_send_len
) {
1401 /* Service connections don't get asynchronous messages unless they have
1402 * explicitly asked for them by setting a nonzero miss send length. */
1406 async_config
= (ofconn
->role
== OFPCR12_ROLE_SLAVE
1407 ? ofconn
->slave_async_config
1408 : ofconn
->master_async_config
);
1409 if (!(async_config
[type
] & (1u << reason
))) {
1416 /* Returns a human-readable name for an OpenFlow connection between 'mgr' and
1417 * 'target', suitable for use in log messages for identifying the connection.
1419 * The name is dynamically allocated. The caller should free it (with free())
1420 * when it is no longer needed. */
1422 ofconn_make_name(const struct connmgr
*mgr
, const char *target
)
1424 return xasprintf("%s<->%s", mgr
->name
, target
);
1428 ofconn_set_rate_limit(struct ofconn
*ofconn
, int rate
, int burst
)
1432 for (i
= 0; i
< N_SCHEDULERS
; i
++) {
1433 struct pinsched
**s
= &ofconn
->schedulers
[i
];
1437 *s
= pinsched_create(rate
, burst
);
1439 pinsched_set_limits(*s
, rate
, burst
);
1442 pinsched_destroy(*s
);
1449 ofconn_send(const struct ofconn
*ofconn
, struct ofpbuf
*msg
,
1450 struct rconn_packet_counter
*counter
)
1452 ofpmsg_update_length(msg
);
1453 rconn_send(ofconn
->rconn
, msg
, counter
);
1456 /* Sending asynchronous messages. */
1458 static void schedule_packet_in(struct ofconn
*, struct ofproto_packet_in
,
1459 enum ofp_packet_in_reason wire_reason
);
1461 /* Sends an OFPT_PORT_STATUS message with 'opp' and 'reason' to appropriate
1462 * controllers managed by 'mgr'. */
1464 connmgr_send_port_status(struct connmgr
*mgr
,
1465 const struct ofputil_phy_port
*pp
, uint8_t reason
)
1467 /* XXX Should limit the number of queued port status change messages. */
1468 struct ofputil_port_status ps
;
1469 struct ofconn
*ofconn
;
1473 LIST_FOR_EACH (ofconn
, node
, &mgr
->all_conns
) {
1474 if (ofconn_receives_async_msg(ofconn
, OAM_PORT_STATUS
, reason
)) {
1477 msg
= ofputil_encode_port_status(&ps
, ofconn_get_protocol(ofconn
));
1478 ofconn_send(ofconn
, msg
, NULL
);
1483 /* Sends an OFPT_FLOW_REMOVED or NXT_FLOW_REMOVED message based on 'fr' to
1484 * appropriate controllers managed by 'mgr'. */
1486 connmgr_send_flow_removed(struct connmgr
*mgr
,
1487 const struct ofputil_flow_removed
*fr
)
1489 struct ofconn
*ofconn
;
1491 LIST_FOR_EACH (ofconn
, node
, &mgr
->all_conns
) {
1492 if (ofconn_receives_async_msg(ofconn
, OAM_FLOW_REMOVED
, fr
->reason
)) {
1495 /* Account flow expirations as replies to OpenFlow requests. That
1496 * works because preventing OpenFlow requests from being processed
1497 * also prevents new flows from being added (and expiring). (It
1498 * also prevents processing OpenFlow requests that would not add
1499 * new flows, so it is imperfect.) */
1500 msg
= ofputil_encode_flow_removed(fr
, ofconn_get_protocol(ofconn
));
1501 ofconn_send_reply(ofconn
, msg
);
1506 /* Normally a send-to-controller action uses reason OFPR_ACTION. However, in
1507 * OpenFlow 1.3 and later, packet_ins generated by a send-to-controller action
1508 * in a "table-miss" flow (one with priority 0 and completely wildcarded) are
1509 * sent as OFPR_NO_MATCH. This function returns the reason that should
1510 * actually be sent on 'ofconn' for 'pin'. */
1511 static enum ofp_packet_in_reason
1512 wire_reason(struct ofconn
*ofconn
, const struct ofproto_packet_in
*pin
)
1514 if (pin
->generated_by_table_miss
&& pin
->up
.reason
== OFPR_ACTION
) {
1515 enum ofputil_protocol protocol
= ofconn_get_protocol(ofconn
);
1517 if (protocol
!= OFPUTIL_P_NONE
1518 && ofputil_protocol_to_ofp_version(protocol
) >= OFP13_VERSION
) {
1519 return OFPR_NO_MATCH
;
1522 return pin
->up
.reason
;
1525 /* Given 'pin', sends an OFPT_PACKET_IN message to each OpenFlow controller as
1526 * necessary according to their individual configurations.
1528 * The caller doesn't need to fill in pin->buffer_id or pin->total_len. */
1530 connmgr_send_packet_in(struct connmgr
*mgr
,
1531 const struct ofproto_packet_in
*pin
)
1533 struct ofconn
*ofconn
;
1535 LIST_FOR_EACH (ofconn
, node
, &mgr
->all_conns
) {
1536 enum ofp_packet_in_reason reason
= wire_reason(ofconn
, pin
);
1538 if (ofconn_receives_async_msg(ofconn
, OAM_PACKET_IN
, reason
)
1539 && ofconn
->controller_id
== pin
->controller_id
) {
1540 schedule_packet_in(ofconn
, *pin
, reason
);
1546 do_send_packet_ins(struct ofconn
*ofconn
, struct list
*txq
)
1548 struct ofpbuf
*pin
, *next_pin
;
1550 LIST_FOR_EACH_SAFE (pin
, next_pin
, list_node
, txq
) {
1551 list_remove(&pin
->list_node
);
1553 rconn_send_with_limit(ofconn
->rconn
, pin
,
1554 ofconn
->packet_in_counter
, 100);
1558 /* Takes 'pin', composes an OpenFlow packet-in message from it, and passes it
1559 * to 'ofconn''s packet scheduler for sending. */
1561 schedule_packet_in(struct ofconn
*ofconn
, struct ofproto_packet_in pin
,
1562 enum ofp_packet_in_reason wire_reason
)
1564 struct connmgr
*mgr
= ofconn
->connmgr
;
1565 uint16_t controller_max_len
;
1568 pin
.up
.total_len
= pin
.up
.packet_len
;
1570 pin
.up
.reason
= wire_reason
;
1571 if (pin
.up
.reason
== OFPR_ACTION
) {
1572 controller_max_len
= pin
.send_len
; /* max_len */
1574 controller_max_len
= ofconn
->miss_send_len
;
1577 /* Get OpenFlow buffer_id.
1578 * For OpenFlow 1.2+, OFPCML_NO_BUFFER (== UINT16_MAX) specifies
1579 * unbuffered. This behaviour doesn't violate prior versions, too. */
1580 if (controller_max_len
== UINT16_MAX
) {
1581 pin
.up
.buffer_id
= UINT32_MAX
;
1582 } else if (mgr
->fail_open
&& fail_open_is_active(mgr
->fail_open
)) {
1583 pin
.up
.buffer_id
= pktbuf_get_null();
1584 } else if (!ofconn
->pktbuf
) {
1585 pin
.up
.buffer_id
= UINT32_MAX
;
1587 pin
.up
.buffer_id
= pktbuf_save(ofconn
->pktbuf
,
1588 pin
.up
.packet
, pin
.up
.packet_len
,
1589 pin
.up
.fmd
.in_port
);
1592 /* Figure out how much of the packet to send.
1593 * If not buffered, send the entire packet. Otherwise, depending on
1594 * the reason of packet-in, send what requested by the controller. */
1595 if (pin
.up
.buffer_id
!= UINT32_MAX
1596 && controller_max_len
< pin
.up
.packet_len
) {
1597 pin
.up
.packet_len
= controller_max_len
;
1600 /* Make OFPT_PACKET_IN and hand over to packet scheduler. */
1601 pinsched_send(ofconn
->schedulers
[pin
.up
.reason
== OFPR_NO_MATCH
? 0 : 1],
1603 ofputil_encode_packet_in(&pin
.up
,
1604 ofconn_get_protocol(ofconn
),
1605 ofconn
->packet_in_format
),
1607 do_send_packet_ins(ofconn
, &txq
);
1610 /* Fail-open settings. */
1612 /* Returns the failure handling mode (OFPROTO_FAIL_SECURE or
1613 * OFPROTO_FAIL_STANDALONE) for 'mgr'. */
1614 enum ofproto_fail_mode
1615 connmgr_get_fail_mode(const struct connmgr
*mgr
)
1617 return mgr
->fail_mode
;
1620 /* Sets the failure handling mode for 'mgr' to 'fail_mode' (either
1621 * OFPROTO_FAIL_SECURE or OFPROTO_FAIL_STANDALONE). */
1623 connmgr_set_fail_mode(struct connmgr
*mgr
, enum ofproto_fail_mode fail_mode
)
1625 if (mgr
->fail_mode
!= fail_mode
) {
1626 mgr
->fail_mode
= fail_mode
;
1627 update_fail_open(mgr
);
1628 if (!connmgr_has_controllers(mgr
)) {
1629 ofproto_flush_flows(mgr
->ofproto
);
1634 /* Fail-open implementation. */
1636 /* Returns the longest probe interval among the primary controllers configured
1637 * on 'mgr'. Returns 0 if there are no primary controllers. */
1639 connmgr_get_max_probe_interval(const struct connmgr
*mgr
)
1641 const struct ofconn
*ofconn
;
1642 int max_probe_interval
;
1644 max_probe_interval
= 0;
1645 HMAP_FOR_EACH (ofconn
, hmap_node
, &mgr
->controllers
) {
1646 int probe_interval
= rconn_get_probe_interval(ofconn
->rconn
);
1647 max_probe_interval
= MAX(max_probe_interval
, probe_interval
);
1649 return max_probe_interval
;
1652 /* Returns the number of seconds for which all of 'mgr's primary controllers
1653 * have been disconnected. Returns 0 if 'mgr' has no primary controllers. */
1655 connmgr_failure_duration(const struct connmgr
*mgr
)
1657 const struct ofconn
*ofconn
;
1658 int min_failure_duration
;
1660 if (!connmgr_has_controllers(mgr
)) {
1664 min_failure_duration
= INT_MAX
;
1665 HMAP_FOR_EACH (ofconn
, hmap_node
, &mgr
->controllers
) {
1666 int failure_duration
= rconn_failure_duration(ofconn
->rconn
);
1667 min_failure_duration
= MIN(min_failure_duration
, failure_duration
);
1669 return min_failure_duration
;
1672 /* Returns true if at least one primary controller is connected (regardless of
1673 * whether those controllers are believed to have authenticated and accepted
1674 * this switch), false if none of them are connected. */
1676 connmgr_is_any_controller_connected(const struct connmgr
*mgr
)
1678 const struct ofconn
*ofconn
;
1680 HMAP_FOR_EACH (ofconn
, hmap_node
, &mgr
->controllers
) {
1681 if (rconn_is_connected(ofconn
->rconn
)) {
1688 /* Returns true if at least one primary controller is believed to have
1689 * authenticated and accepted this switch, false otherwise. */
1691 connmgr_is_any_controller_admitted(const struct connmgr
*mgr
)
1693 const struct ofconn
*ofconn
;
1695 HMAP_FOR_EACH (ofconn
, hmap_node
, &mgr
->controllers
) {
1696 if (rconn_is_admitted(ofconn
->rconn
)) {
1703 /* In-band configuration. */
1705 static bool any_extras_changed(const struct connmgr
*,
1706 const struct sockaddr_in
*extras
, size_t n
);
1708 /* Sets the 'n' TCP port addresses in 'extras' as ones to which 'mgr''s
1709 * in-band control should guarantee access, in the same way that in-band
1710 * control guarantees access to OpenFlow controllers. */
1712 connmgr_set_extra_in_band_remotes(struct connmgr
*mgr
,
1713 const struct sockaddr_in
*extras
, size_t n
)
1715 if (!any_extras_changed(mgr
, extras
, n
)) {
1719 free(mgr
->extra_in_band_remotes
);
1720 mgr
->n_extra_remotes
= n
;
1721 mgr
->extra_in_band_remotes
= xmemdup(extras
, n
* sizeof *extras
);
1723 update_in_band_remotes(mgr
);
1726 /* Sets the OpenFlow queue used by flows set up by in-band control on
1727 * 'mgr' to 'queue_id'. If 'queue_id' is negative, then in-band control
1728 * flows will use the default queue. */
1730 connmgr_set_in_band_queue(struct connmgr
*mgr
, int queue_id
)
1732 if (queue_id
!= mgr
->in_band_queue
) {
1733 mgr
->in_band_queue
= queue_id
;
1734 update_in_band_remotes(mgr
);
1739 any_extras_changed(const struct connmgr
*mgr
,
1740 const struct sockaddr_in
*extras
, size_t n
)
1744 if (n
!= mgr
->n_extra_remotes
) {
1748 for (i
= 0; i
< n
; i
++) {
1749 const struct sockaddr_in
*old
= &mgr
->extra_in_band_remotes
[i
];
1750 const struct sockaddr_in
*new = &extras
[i
];
1752 if (old
->sin_addr
.s_addr
!= new->sin_addr
.s_addr
||
1753 old
->sin_port
!= new->sin_port
) {
1761 /* In-band implementation. */
1764 connmgr_has_in_band(struct connmgr
*mgr
)
1766 return mgr
->in_band
!= NULL
;
1769 /* Fail-open and in-band implementation. */
1771 /* Called by 'ofproto' after all flows have been flushed, to allow fail-open
1772 * and standalone mode to re-create their flows.
1774 * In-band control has more sophisticated code that manages flows itself. */
1776 connmgr_flushed(struct connmgr
*mgr
)
1777 OVS_EXCLUDED(ofproto_mutex
)
1779 if (mgr
->fail_open
) {
1780 fail_open_flushed(mgr
->fail_open
);
1783 /* If there are no controllers and we're in standalone mode, set up a flow
1784 * that matches every packet and directs them to OFPP_NORMAL (which goes to
1785 * us). Otherwise, the switch is in secure mode and we won't pass any
1786 * traffic until a controller has been defined and it tells us to do so. */
1787 if (!connmgr_has_controllers(mgr
)
1788 && mgr
->fail_mode
== OFPROTO_FAIL_STANDALONE
) {
1789 struct ofpbuf ofpacts
;
1792 ofpbuf_init(&ofpacts
, OFPACT_OUTPUT_SIZE
);
1793 ofpact_put_OUTPUT(&ofpacts
)->port
= OFPP_NORMAL
;
1794 ofpact_pad(&ofpacts
);
1796 match_init_catchall(&match
);
1797 ofproto_add_flow(mgr
->ofproto
, &match
, 0, ofpacts
.data
, ofpacts
.size
);
1799 ofpbuf_uninit(&ofpacts
);
1803 /* Creates a new ofservice for 'target' in 'mgr'. Returns 0 if successful,
1804 * otherwise a positive errno value.
1806 * ofservice_reconfigure() must be called to fully configure the new
1809 ofservice_create(struct connmgr
*mgr
, const char *target
,
1810 uint32_t allowed_versions
, uint8_t dscp
)
1812 struct ofservice
*ofservice
;
1813 struct pvconn
*pvconn
;
1816 error
= pvconn_open(target
, allowed_versions
, dscp
, &pvconn
);
1821 ofservice
= xzalloc(sizeof *ofservice
);
1822 hmap_insert(&mgr
->services
, &ofservice
->node
, hash_string(target
, 0));
1823 ofservice
->pvconn
= pvconn
;
1824 ofservice
->allowed_versions
= allowed_versions
;
1830 ofservice_destroy(struct connmgr
*mgr
, struct ofservice
*ofservice
)
1832 hmap_remove(&mgr
->services
, &ofservice
->node
);
1833 pvconn_close(ofservice
->pvconn
);
1838 ofservice_reconfigure(struct ofservice
*ofservice
,
1839 const struct ofproto_controller
*c
)
1841 ofservice
->probe_interval
= c
->probe_interval
;
1842 ofservice
->rate_limit
= c
->rate_limit
;
1843 ofservice
->burst_limit
= c
->burst_limit
;
1844 ofservice
->enable_async_msgs
= c
->enable_async_msgs
;
1845 ofservice
->dscp
= c
->dscp
;
1848 /* Finds and returns the ofservice within 'mgr' that has the given
1849 * 'target', or a null pointer if none exists. */
1850 static struct ofservice
*
1851 ofservice_lookup(struct connmgr
*mgr
, const char *target
)
1853 struct ofservice
*ofservice
;
1855 HMAP_FOR_EACH_WITH_HASH (ofservice
, node
, hash_string(target
, 0),
1857 if (!strcmp(pvconn_get_name(ofservice
->pvconn
), target
)) {
1864 /* Flow monitors (NXST_FLOW_MONITOR). */
1866 /* A counter incremented when something significant happens to an OpenFlow
1869 * - When a rule is added, its 'add_seqno' and 'modify_seqno' are set to
1870 * the current value (which is then incremented).
1872 * - When a rule is modified, its 'modify_seqno' is set to the current
1873 * value (which is then incremented).
1875 * Thus, by comparing an old value of monitor_seqno against a rule's
1876 * 'add_seqno', one can tell whether the rule was added before or after the old
1877 * value was read, and similarly for 'modify_seqno'.
1879 * 32 bits should normally be sufficient (and would be nice, to save space in
1880 * each rule) but then we'd have to have some special cases for wraparound.
1882 * We initialize monitor_seqno to 1 to allow 0 to be used as an invalid
1884 static uint64_t monitor_seqno
= 1;
1886 COVERAGE_DEFINE(ofmonitor_pause
);
1887 COVERAGE_DEFINE(ofmonitor_resume
);
1890 ofmonitor_create(const struct ofputil_flow_monitor_request
*request
,
1891 struct ofconn
*ofconn
, struct ofmonitor
**monitorp
)
1892 OVS_REQUIRES(ofproto_mutex
)
1894 struct ofmonitor
*m
;
1898 m
= ofmonitor_lookup(ofconn
, request
->id
);
1900 return OFPERR_NXBRC_FM_DUPLICATE_ID
;
1903 m
= xmalloc(sizeof *m
);
1905 hmap_insert(&ofconn
->monitors
, &m
->ofconn_node
, hash_int(request
->id
, 0));
1906 m
->id
= request
->id
;
1907 m
->flags
= request
->flags
;
1908 m
->out_port
= request
->out_port
;
1909 m
->table_id
= request
->table_id
;
1910 minimatch_init(&m
->match
, &request
->match
);
1917 ofmonitor_lookup(struct ofconn
*ofconn
, uint32_t id
)
1918 OVS_REQUIRES(ofproto_mutex
)
1920 struct ofmonitor
*m
;
1922 HMAP_FOR_EACH_IN_BUCKET (m
, ofconn_node
, hash_int(id
, 0),
1923 &ofconn
->monitors
) {
1932 ofmonitor_destroy(struct ofmonitor
*m
)
1933 OVS_REQUIRES(ofproto_mutex
)
1936 minimatch_destroy(&m
->match
);
1937 hmap_remove(&m
->ofconn
->monitors
, &m
->ofconn_node
);
1943 ofmonitor_report(struct connmgr
*mgr
, struct rule
*rule
,
1944 enum nx_flow_update_event event
,
1945 enum ofp_flow_removed_reason reason
,
1946 const struct ofconn
*abbrev_ofconn
, ovs_be32 abbrev_xid
)
1947 OVS_REQUIRES(ofproto_mutex
)
1949 enum nx_flow_monitor_flags update
;
1950 struct ofconn
*ofconn
;
1955 rule
->add_seqno
= rule
->modify_seqno
= monitor_seqno
++;
1959 update
= NXFMF_DELETE
;
1962 case NXFME_MODIFIED
:
1963 update
= NXFMF_MODIFY
;
1964 rule
->modify_seqno
= monitor_seqno
++;
1972 LIST_FOR_EACH (ofconn
, node
, &mgr
->all_conns
) {
1973 enum nx_flow_monitor_flags flags
= 0;
1974 struct ofmonitor
*m
;
1976 if (ofconn
->monitor_paused
) {
1977 /* Only send NXFME_DELETED notifications for flows that were added
1978 * before we paused. */
1979 if (event
!= NXFME_DELETED
1980 || rule
->add_seqno
> ofconn
->monitor_paused
) {
1985 HMAP_FOR_EACH (m
, ofconn_node
, &ofconn
->monitors
) {
1986 if (m
->flags
& update
1987 && (m
->table_id
== 0xff || m
->table_id
== rule
->table_id
)
1988 && ofoperation_has_out_port(rule
->pending
, m
->out_port
)
1989 && cls_rule_is_loose_match(&rule
->cr
, &m
->match
)) {
1995 if (list_is_empty(&ofconn
->updates
)) {
1996 ofputil_start_flow_update(&ofconn
->updates
);
1997 ofconn
->sent_abbrev_update
= false;
2000 if (ofconn
!= abbrev_ofconn
|| ofconn
->monitor_paused
) {
2001 struct ofputil_flow_update fu
;
2005 fu
.reason
= event
== NXFME_DELETED
? reason
: 0;
2006 fu
.table_id
= rule
->table_id
;
2007 fu
.cookie
= rule
->flow_cookie
;
2008 minimatch_expand(&rule
->cr
.match
, &match
);
2010 fu
.priority
= rule
->cr
.priority
;
2012 ovs_mutex_lock(&rule
->mutex
);
2013 fu
.idle_timeout
= rule
->idle_timeout
;
2014 fu
.hard_timeout
= rule
->hard_timeout
;
2015 ovs_mutex_unlock(&rule
->mutex
);
2017 if (flags
& NXFMF_ACTIONS
) {
2018 fu
.ofpacts
= rule
->actions
->ofpacts
;
2019 fu
.ofpacts_len
= rule
->actions
->ofpacts_len
;
2024 ofputil_append_flow_update(&fu
, &ofconn
->updates
);
2025 } else if (!ofconn
->sent_abbrev_update
) {
2026 struct ofputil_flow_update fu
;
2028 fu
.event
= NXFME_ABBREV
;
2029 fu
.xid
= abbrev_xid
;
2030 ofputil_append_flow_update(&fu
, &ofconn
->updates
);
2032 ofconn
->sent_abbrev_update
= true;
2039 ofmonitor_flush(struct connmgr
*mgr
)
2040 OVS_REQUIRES(ofproto_mutex
)
2042 struct ofconn
*ofconn
;
2044 LIST_FOR_EACH (ofconn
, node
, &mgr
->all_conns
) {
2045 struct ofpbuf
*msg
, *next
;
2047 LIST_FOR_EACH_SAFE (msg
, next
, list_node
, &ofconn
->updates
) {
2048 unsigned int n_bytes
;
2050 list_remove(&msg
->list_node
);
2051 ofconn_send(ofconn
, msg
, ofconn
->monitor_counter
);
2052 n_bytes
= rconn_packet_counter_n_bytes(ofconn
->monitor_counter
);
2053 if (!ofconn
->monitor_paused
&& n_bytes
> 128 * 1024) {
2054 struct ofpbuf
*pause
;
2056 COVERAGE_INC(ofmonitor_pause
);
2057 ofconn
->monitor_paused
= monitor_seqno
++;
2058 pause
= ofpraw_alloc_xid(OFPRAW_NXT_FLOW_MONITOR_PAUSED
,
2059 OFP10_VERSION
, htonl(0), 0);
2060 ofconn_send(ofconn
, pause
, ofconn
->monitor_counter
);
2067 ofmonitor_resume(struct ofconn
*ofconn
)
2068 OVS_REQUIRES(ofproto_mutex
)
2070 struct rule_collection rules
;
2071 struct ofpbuf
*resumed
;
2072 struct ofmonitor
*m
;
2075 rule_collection_init(&rules
);
2076 HMAP_FOR_EACH (m
, ofconn_node
, &ofconn
->monitors
) {
2077 ofmonitor_collect_resume_rules(m
, ofconn
->monitor_paused
, &rules
);
2081 ofmonitor_compose_refresh_updates(&rules
, &msgs
);
2083 resumed
= ofpraw_alloc_xid(OFPRAW_NXT_FLOW_MONITOR_RESUMED
, OFP10_VERSION
,
2085 list_push_back(&msgs
, &resumed
->list_node
);
2086 ofconn_send_replies(ofconn
, &msgs
);
2088 ofconn
->monitor_paused
= 0;
2092 ofmonitor_may_resume(const struct ofconn
*ofconn
)
2093 OVS_REQUIRES(ofproto_mutex
)
2095 return (ofconn
->monitor_paused
!= 0
2096 && !rconn_packet_counter_n_packets(ofconn
->monitor_counter
));
2100 ofmonitor_run(struct connmgr
*mgr
)
2102 struct ofconn
*ofconn
;
2104 ovs_mutex_lock(&ofproto_mutex
);
2105 LIST_FOR_EACH (ofconn
, node
, &mgr
->all_conns
) {
2106 if (ofmonitor_may_resume(ofconn
)) {
2107 COVERAGE_INC(ofmonitor_resume
);
2108 ofmonitor_resume(ofconn
);
2111 ovs_mutex_unlock(&ofproto_mutex
);
2115 ofmonitor_wait(struct connmgr
*mgr
)
2117 struct ofconn
*ofconn
;
2119 ovs_mutex_lock(&ofproto_mutex
);
2120 LIST_FOR_EACH (ofconn
, node
, &mgr
->all_conns
) {
2121 if (ofmonitor_may_resume(ofconn
)) {
2122 poll_immediate_wake();
2125 ovs_mutex_unlock(&ofproto_mutex
);