2 * Copyright (c) 2009, 2010, 2011, 2012 Nicira Networks.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at:
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
25 #include "fail-open.h"
30 #include "ofproto-provider.h"
32 #include "poll-loop.h"
41 VLOG_DEFINE_THIS_MODULE(connmgr
);
42 static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(1, 5);
44 /* An OpenFlow connection. */
46 /* Configuration that persists from one connection to the next. */
48 struct list node
; /* In struct connmgr's "all_conns" list. */
49 struct hmap_node hmap_node
; /* In struct connmgr's "controllers" map. */
51 struct connmgr
*connmgr
; /* Connection's manager. */
52 struct rconn
*rconn
; /* OpenFlow connection. */
53 enum ofconn_type type
; /* Type. */
54 enum ofproto_band band
; /* In-band or out-of-band? */
56 /* State that should be cleared from one connection to the next. */
59 enum nx_role role
; /* Role. */
60 enum nx_flow_format flow_format
; /* Currently selected flow format. */
61 enum nx_packet_in_format packet_in_format
; /* OFPT_PACKET_IN format. */
62 bool flow_mod_table_id
; /* NXT_FLOW_MOD_TABLE_ID enabled? */
63 bool invalid_ttl_to_controller
; /* Send packets with invalid TTL
66 /* Asynchronous flow table operation support. */
67 struct list opgroups
; /* Contains pending "ofopgroups", if any. */
68 struct ofpbuf
*blocked
; /* Postponed OpenFlow message, if any. */
69 bool retry
; /* True if 'blocked' is ready to try again. */
71 /* OFPT_PACKET_IN related data. */
72 struct rconn_packet_counter
*packet_in_counter
; /* # queued on 'rconn'. */
73 #define N_SCHEDULERS 2
74 struct pinsched
*schedulers
[N_SCHEDULERS
];
75 struct pktbuf
*pktbuf
; /* OpenFlow packet buffers. */
76 int miss_send_len
; /* Bytes to send of buffered packets. */
78 /* Number of OpenFlow messages queued on 'rconn' as replies to OpenFlow
79 * requests, and the maximum number before we stop reading OpenFlow
81 #define OFCONN_REPLY_MAX 100
82 struct rconn_packet_counter
*reply_counter
;
85 static struct ofconn
*ofconn_create(struct connmgr
*, struct rconn
*,
87 static void ofconn_destroy(struct ofconn
*);
88 static void ofconn_flush(struct ofconn
*);
90 static void ofconn_reconfigure(struct ofconn
*,
91 const struct ofproto_controller
*);
93 static void ofconn_run(struct ofconn
*,
94 bool (*handle_openflow
)(struct ofconn
*,
95 struct ofpbuf
*ofp_msg
));
96 static void ofconn_wait(struct ofconn
*, bool handling_openflow
);
98 static const char *ofconn_get_target(const struct ofconn
*);
99 static char *ofconn_make_name(const struct connmgr
*, const char *target
);
101 static void ofconn_set_rate_limit(struct ofconn
*, int rate
, int burst
);
103 static bool ofconn_receives_async_msgs(const struct ofconn
*);
105 static void ofconn_send(const struct ofconn
*, struct ofpbuf
*,
106 struct rconn_packet_counter
*);
108 static void do_send_packet_in(struct ofpbuf
*, void *ofconn_
);
110 /* A listener for incoming OpenFlow "service" connections. */
112 struct hmap_node node
; /* In struct connmgr's "services" hmap. */
113 struct pvconn
*pvconn
; /* OpenFlow connection listener. */
115 /* These are not used by ofservice directly. They are settings for
116 * accepted "struct ofconn"s from the pvconn. */
117 int probe_interval
; /* Max idle time before probing, in seconds. */
118 int rate_limit
; /* Max packet-in rate in packets per second. */
119 int burst_limit
; /* Limit on accumulating packet credits. */
122 static void ofservice_reconfigure(struct ofservice
*,
123 const struct ofproto_controller
*);
124 static int ofservice_create(struct connmgr
*, const char *target
);
125 static void ofservice_destroy(struct connmgr
*, struct ofservice
*);
126 static struct ofservice
*ofservice_lookup(struct connmgr
*,
129 /* Connection manager for an OpenFlow switch. */
131 struct ofproto
*ofproto
;
133 char *local_port_name
;
135 /* OpenFlow connections. */
136 struct hmap controllers
; /* Controller "struct ofconn"s. */
137 struct list all_conns
; /* Contains "struct ofconn"s. */
139 /* OpenFlow listeners. */
140 struct hmap services
; /* Contains "struct ofservice"s. */
141 struct pvconn
**snoops
;
145 struct fail_open
*fail_open
;
146 enum ofproto_fail_mode fail_mode
;
148 /* In-band control. */
149 struct in_band
*in_band
;
150 struct sockaddr_in
*extra_in_band_remotes
;
151 size_t n_extra_remotes
;
155 static void update_in_band_remotes(struct connmgr
*);
156 static void add_snooper(struct connmgr
*, struct vconn
*);
158 /* Creates and returns a new connection manager owned by 'ofproto'. 'name' is
159 * a name for the ofproto suitable for using in log messages.
160 * 'local_port_name' is the name of the local port (OFPP_LOCAL) within
163 connmgr_create(struct ofproto
*ofproto
,
164 const char *name
, const char *local_port_name
)
168 mgr
= xmalloc(sizeof *mgr
);
169 mgr
->ofproto
= ofproto
;
170 mgr
->name
= xstrdup(name
);
171 mgr
->local_port_name
= xstrdup(local_port_name
);
173 hmap_init(&mgr
->controllers
);
174 list_init(&mgr
->all_conns
);
176 hmap_init(&mgr
->services
);
180 mgr
->fail_open
= NULL
;
181 mgr
->fail_mode
= OFPROTO_FAIL_SECURE
;
184 mgr
->extra_in_band_remotes
= NULL
;
185 mgr
->n_extra_remotes
= 0;
186 mgr
->in_band_queue
= -1;
191 /* Frees 'mgr' and all of its resources. */
193 connmgr_destroy(struct connmgr
*mgr
)
195 struct ofservice
*ofservice
, *next_ofservice
;
196 struct ofconn
*ofconn
, *next_ofconn
;
203 LIST_FOR_EACH_SAFE (ofconn
, next_ofconn
, node
, &mgr
->all_conns
) {
204 ofconn_destroy(ofconn
);
206 hmap_destroy(&mgr
->controllers
);
208 HMAP_FOR_EACH_SAFE (ofservice
, next_ofservice
, node
, &mgr
->services
) {
209 ofservice_destroy(mgr
, ofservice
);
211 hmap_destroy(&mgr
->services
);
213 for (i
= 0; i
< mgr
->n_snoops
; i
++) {
214 pvconn_close(mgr
->snoops
[i
]);
218 fail_open_destroy(mgr
->fail_open
);
219 mgr
->fail_open
= NULL
;
221 in_band_destroy(mgr
->in_band
);
223 free(mgr
->extra_in_band_remotes
);
225 free(mgr
->local_port_name
);
230 /* Does all of the periodic maintenance required by 'mgr'.
232 * If 'handle_openflow' is nonnull, calls 'handle_openflow' for each message
233 * received on an OpenFlow connection, passing along the OpenFlow connection
234 * itself and the message that was sent. If 'handle_openflow' returns true,
235 * the message is considered to be fully processed. If 'handle_openflow'
236 * returns false, the message is considered not to have been processed at all;
237 * it will be stored and re-presented to 'handle_openflow' following the next
238 * call to connmgr_retry(). 'handle_openflow' must not modify or free the
241 * If 'handle_openflow' is NULL, no OpenFlow messages will be processed and
242 * other activities that could affect the flow table (in-band processing,
243 * fail-open processing) are suppressed too. */
245 connmgr_run(struct connmgr
*mgr
,
246 bool (*handle_openflow
)(struct ofconn
*, struct ofpbuf
*ofp_msg
))
248 struct ofconn
*ofconn
, *next_ofconn
;
249 struct ofservice
*ofservice
;
252 if (handle_openflow
&& mgr
->in_band
) {
253 if (!in_band_run(mgr
->in_band
)) {
254 in_band_destroy(mgr
->in_band
);
259 LIST_FOR_EACH_SAFE (ofconn
, next_ofconn
, node
, &mgr
->all_conns
) {
260 ofconn_run(ofconn
, handle_openflow
);
263 /* Fail-open maintenance. Do this after processing the ofconns since
264 * fail-open checks the status of the controller rconn. */
265 if (handle_openflow
&& mgr
->fail_open
) {
266 fail_open_run(mgr
->fail_open
);
269 HMAP_FOR_EACH (ofservice
, node
, &mgr
->services
) {
273 retval
= pvconn_accept(ofservice
->pvconn
, OFP_VERSION
, &vconn
);
278 rconn
= rconn_create(ofservice
->probe_interval
, 0);
279 name
= ofconn_make_name(mgr
, vconn_get_name(vconn
));
280 rconn_connect_unreliably(rconn
, vconn
, name
);
283 ofconn
= ofconn_create(mgr
, rconn
, OFCONN_SERVICE
);
284 ofconn_set_rate_limit(ofconn
, ofservice
->rate_limit
,
285 ofservice
->burst_limit
);
286 } else if (retval
!= EAGAIN
) {
287 VLOG_WARN_RL(&rl
, "accept failed (%s)", strerror(retval
));
291 for (i
= 0; i
< mgr
->n_snoops
; i
++) {
295 retval
= pvconn_accept(mgr
->snoops
[i
], OFP_VERSION
, &vconn
);
297 add_snooper(mgr
, vconn
);
298 } else if (retval
!= EAGAIN
) {
299 VLOG_WARN_RL(&rl
, "accept failed (%s)", strerror(retval
));
304 /* Causes the poll loop to wake up when connmgr_run() needs to run.
306 * If 'handling_openflow' is true, arriving OpenFlow messages and other
307 * activities that affect the flow table will wake up the poll loop. If
308 * 'handling_openflow' is false, they will not. */
310 connmgr_wait(struct connmgr
*mgr
, bool handling_openflow
)
312 struct ofservice
*ofservice
;
313 struct ofconn
*ofconn
;
316 LIST_FOR_EACH (ofconn
, node
, &mgr
->all_conns
) {
317 ofconn_wait(ofconn
, handling_openflow
);
319 if (handling_openflow
&& mgr
->in_band
) {
320 in_band_wait(mgr
->in_band
);
322 if (handling_openflow
&& mgr
->fail_open
) {
323 fail_open_wait(mgr
->fail_open
);
325 HMAP_FOR_EACH (ofservice
, node
, &mgr
->services
) {
326 pvconn_wait(ofservice
->pvconn
);
328 for (i
= 0; i
< mgr
->n_snoops
; i
++) {
329 pvconn_wait(mgr
->snoops
[i
]);
333 /* Returns the ofproto that owns 'ofconn''s connmgr. */
335 ofconn_get_ofproto(const struct ofconn
*ofconn
)
337 return ofconn
->connmgr
->ofproto
;
340 /* If processing of OpenFlow messages was blocked on any 'mgr' ofconns by
341 * returning false to the 'handle_openflow' callback to connmgr_run(), this
342 * re-enables them. */
344 connmgr_retry(struct connmgr
*mgr
)
346 struct ofconn
*ofconn
;
348 LIST_FOR_EACH (ofconn
, node
, &mgr
->all_conns
) {
349 ofconn
->retry
= true;
353 /* OpenFlow configuration. */
355 static void add_controller(struct connmgr
*, const char *target
);
356 static struct ofconn
*find_controller_by_target(struct connmgr
*,
358 static void update_fail_open(struct connmgr
*);
359 static int set_pvconns(struct pvconn
***pvconnsp
, size_t *n_pvconnsp
,
360 const struct sset
*);
362 /* Returns true if 'mgr' has any configured primary controllers.
364 * Service controllers do not count, but configured primary controllers do
365 * count whether or not they are currently connected. */
367 connmgr_has_controllers(const struct connmgr
*mgr
)
369 return !hmap_is_empty(&mgr
->controllers
);
372 /* Initializes 'info' and populates it with information about each configured
373 * primary controller. The keys in 'info' are the controllers' targets; the
374 * data values are corresponding "struct ofproto_controller_info".
376 * The caller owns 'info' and everything in it and should free it when it is no
379 connmgr_get_controller_info(struct connmgr
*mgr
, struct shash
*info
)
381 const struct ofconn
*ofconn
;
383 HMAP_FOR_EACH (ofconn
, hmap_node
, &mgr
->controllers
) {
384 const struct rconn
*rconn
= ofconn
->rconn
;
385 const char *target
= rconn_get_target(rconn
);
387 if (!shash_find(info
, target
)) {
388 struct ofproto_controller_info
*cinfo
= xmalloc(sizeof *cinfo
);
389 time_t now
= time_now();
390 time_t last_connection
= rconn_get_last_connection(rconn
);
391 time_t last_disconnect
= rconn_get_last_disconnect(rconn
);
392 int last_error
= rconn_get_last_error(rconn
);
394 shash_add(info
, target
, cinfo
);
396 cinfo
->is_connected
= rconn_is_connected(rconn
);
397 cinfo
->role
= ofconn
->role
;
402 cinfo
->pairs
.keys
[cinfo
->pairs
.n
] = "last_error";
403 cinfo
->pairs
.values
[cinfo
->pairs
.n
++]
404 = xstrdup(ovs_retval_to_string(last_error
));
407 cinfo
->pairs
.keys
[cinfo
->pairs
.n
] = "state";
408 cinfo
->pairs
.values
[cinfo
->pairs
.n
++]
409 = xstrdup(rconn_get_state(rconn
));
411 if (last_connection
!= TIME_MIN
) {
412 cinfo
->pairs
.keys
[cinfo
->pairs
.n
] = "sec_since_connect";
413 cinfo
->pairs
.values
[cinfo
->pairs
.n
++]
414 = xasprintf("%ld", (long int) (now
- last_connection
));
417 if (last_disconnect
!= TIME_MIN
) {
418 cinfo
->pairs
.keys
[cinfo
->pairs
.n
] = "sec_since_disconnect";
419 cinfo
->pairs
.values
[cinfo
->pairs
.n
++]
420 = xasprintf("%ld", (long int) (now
- last_disconnect
));
427 connmgr_free_controller_info(struct shash
*info
)
429 struct shash_node
*node
;
431 SHASH_FOR_EACH (node
, info
) {
432 struct ofproto_controller_info
*cinfo
= node
->data
;
433 while (cinfo
->pairs
.n
) {
434 free((char *) cinfo
->pairs
.values
[--cinfo
->pairs
.n
]);
441 /* Changes 'mgr''s set of controllers to the 'n_controllers' controllers in
444 connmgr_set_controllers(struct connmgr
*mgr
,
445 const struct ofproto_controller
*controllers
,
446 size_t n_controllers
)
448 bool had_controllers
= connmgr_has_controllers(mgr
);
449 struct shash new_controllers
;
450 struct ofconn
*ofconn
, *next_ofconn
;
451 struct ofservice
*ofservice
, *next_ofservice
;
454 /* Create newly configured controllers and services.
455 * Create a name to ofproto_controller mapping in 'new_controllers'. */
456 shash_init(&new_controllers
);
457 for (i
= 0; i
< n_controllers
; i
++) {
458 const struct ofproto_controller
*c
= &controllers
[i
];
460 if (!vconn_verify_name(c
->target
)) {
461 if (!find_controller_by_target(mgr
, c
->target
)) {
462 add_controller(mgr
, c
->target
);
464 } else if (!pvconn_verify_name(c
->target
)) {
465 if (!ofservice_lookup(mgr
, c
->target
)) {
466 ofservice_create(mgr
, c
->target
);
469 VLOG_WARN_RL(&rl
, "%s: unsupported controller \"%s\"",
470 mgr
->name
, c
->target
);
474 shash_add_once(&new_controllers
, c
->target
, &controllers
[i
]);
477 /* Delete controllers that are no longer configured.
478 * Update configuration of all now-existing controllers. */
479 HMAP_FOR_EACH_SAFE (ofconn
, next_ofconn
, hmap_node
, &mgr
->controllers
) {
480 struct ofproto_controller
*c
;
482 c
= shash_find_data(&new_controllers
, ofconn_get_target(ofconn
));
484 ofconn_destroy(ofconn
);
486 ofconn_reconfigure(ofconn
, c
);
490 /* Delete services that are no longer configured.
491 * Update configuration of all now-existing services. */
492 HMAP_FOR_EACH_SAFE (ofservice
, next_ofservice
, node
, &mgr
->services
) {
493 struct ofproto_controller
*c
;
495 c
= shash_find_data(&new_controllers
,
496 pvconn_get_name(ofservice
->pvconn
));
498 ofservice_destroy(mgr
, ofservice
);
500 ofservice_reconfigure(ofservice
, c
);
504 shash_destroy(&new_controllers
);
506 update_in_band_remotes(mgr
);
507 update_fail_open(mgr
);
508 if (had_controllers
!= connmgr_has_controllers(mgr
)) {
509 ofproto_flush_flows(mgr
->ofproto
);
513 /* Drops the connections between 'mgr' and all of its primary and secondary
514 * controllers, forcing them to reconnect. */
516 connmgr_reconnect(const struct connmgr
*mgr
)
518 struct ofconn
*ofconn
;
520 LIST_FOR_EACH (ofconn
, node
, &mgr
->all_conns
) {
521 rconn_reconnect(ofconn
->rconn
);
525 /* Sets the "snoops" for 'mgr' to the pvconn targets listed in 'snoops'.
527 * A "snoop" is a pvconn to which every OpenFlow message to or from the most
528 * important controller on 'mgr' is mirrored. */
530 connmgr_set_snoops(struct connmgr
*mgr
, const struct sset
*snoops
)
532 return set_pvconns(&mgr
->snoops
, &mgr
->n_snoops
, snoops
);
535 /* Adds each of the snoops currently configured on 'mgr' to 'snoops'. */
537 connmgr_get_snoops(const struct connmgr
*mgr
, struct sset
*snoops
)
541 for (i
= 0; i
< mgr
->n_snoops
; i
++) {
542 sset_add(snoops
, pvconn_get_name(mgr
->snoops
[i
]));
546 /* Returns true if 'mgr' has at least one snoop, false if it has none. */
548 connmgr_has_snoops(const struct connmgr
*mgr
)
550 return mgr
->n_snoops
> 0;
553 /* Creates a new controller for 'target' in 'mgr'. update_controller() needs
554 * to be called later to finish the new ofconn's configuration. */
556 add_controller(struct connmgr
*mgr
, const char *target
)
558 char *name
= ofconn_make_name(mgr
, target
);
559 struct ofconn
*ofconn
;
561 ofconn
= ofconn_create(mgr
, rconn_create(5, 8), OFCONN_PRIMARY
);
562 ofconn
->pktbuf
= pktbuf_create();
563 rconn_connect(ofconn
->rconn
, target
, name
);
564 hmap_insert(&mgr
->controllers
, &ofconn
->hmap_node
, hash_string(target
, 0));
569 static struct ofconn
*
570 find_controller_by_target(struct connmgr
*mgr
, const char *target
)
572 struct ofconn
*ofconn
;
574 HMAP_FOR_EACH_WITH_HASH (ofconn
, hmap_node
,
575 hash_string(target
, 0), &mgr
->controllers
) {
576 if (!strcmp(ofconn_get_target(ofconn
), target
)) {
584 update_in_band_remotes(struct connmgr
*mgr
)
586 struct sockaddr_in
*addrs
;
587 size_t max_addrs
, n_addrs
;
588 struct ofconn
*ofconn
;
591 /* Allocate enough memory for as many remotes as we could possibly have. */
592 max_addrs
= mgr
->n_extra_remotes
+ hmap_count(&mgr
->controllers
);
593 addrs
= xmalloc(max_addrs
* sizeof *addrs
);
596 /* Add all the remotes. */
597 HMAP_FOR_EACH (ofconn
, hmap_node
, &mgr
->controllers
) {
598 struct sockaddr_in
*sin
= &addrs
[n_addrs
];
599 const char *target
= rconn_get_target(ofconn
->rconn
);
601 if (ofconn
->band
== OFPROTO_OUT_OF_BAND
) {
605 if (stream_parse_target_with_default_ports(target
,
612 for (i
= 0; i
< mgr
->n_extra_remotes
; i
++) {
613 addrs
[n_addrs
++] = mgr
->extra_in_band_remotes
[i
];
616 /* Create or update or destroy in-band. */
619 in_band_create(mgr
->ofproto
, mgr
->local_port_name
, &mgr
->in_band
);
621 in_band_set_queue(mgr
->in_band
, mgr
->in_band_queue
);
623 /* in_band_run() needs a chance to delete any existing in-band flows.
624 * We will destroy mgr->in_band after it's done with that. */
627 in_band_set_remotes(mgr
->in_band
, addrs
, n_addrs
);
635 update_fail_open(struct connmgr
*mgr
)
637 if (connmgr_has_controllers(mgr
)
638 && mgr
->fail_mode
== OFPROTO_FAIL_STANDALONE
) {
639 if (!mgr
->fail_open
) {
640 mgr
->fail_open
= fail_open_create(mgr
->ofproto
, mgr
);
643 fail_open_destroy(mgr
->fail_open
);
644 mgr
->fail_open
= NULL
;
649 set_pvconns(struct pvconn
***pvconnsp
, size_t *n_pvconnsp
,
650 const struct sset
*sset
)
652 struct pvconn
**pvconns
= *pvconnsp
;
653 size_t n_pvconns
= *n_pvconnsp
;
658 for (i
= 0; i
< n_pvconns
; i
++) {
659 pvconn_close(pvconns
[i
]);
663 pvconns
= xmalloc(sset_count(sset
) * sizeof *pvconns
);
665 SSET_FOR_EACH (name
, sset
) {
666 struct pvconn
*pvconn
;
669 error
= pvconn_open(name
, &pvconn
);
671 pvconns
[n_pvconns
++] = pvconn
;
673 VLOG_ERR("failed to listen on %s: %s", name
, strerror(error
));
681 *n_pvconnsp
= n_pvconns
;
686 /* Returns a "preference level" for snooping 'ofconn'. A higher return value
687 * means that 'ofconn' is more interesting for monitoring than a lower return
690 snoop_preference(const struct ofconn
*ofconn
)
692 switch (ofconn
->role
) {
700 /* Shouldn't happen. */
705 /* One of 'mgr''s "snoop" pvconns has accepted a new connection on 'vconn'.
706 * Connects this vconn to a controller. */
708 add_snooper(struct connmgr
*mgr
, struct vconn
*vconn
)
710 struct ofconn
*ofconn
, *best
;
712 /* Pick a controller for monitoring. */
714 LIST_FOR_EACH (ofconn
, node
, &mgr
->all_conns
) {
715 if (ofconn
->type
== OFCONN_PRIMARY
716 && (!best
|| snoop_preference(ofconn
) > snoop_preference(best
))) {
722 rconn_add_monitor(best
->rconn
, vconn
);
724 VLOG_INFO_RL(&rl
, "no controller connection to snoop");
729 /* Public ofconn functions. */
731 /* Returns the connection type, either OFCONN_PRIMARY or OFCONN_SERVICE. */
733 ofconn_get_type(const struct ofconn
*ofconn
)
738 /* Returns the role configured for 'ofconn'.
740 * The default role, if no other role has been set, is NX_ROLE_OTHER. */
742 ofconn_get_role(const struct ofconn
*ofconn
)
747 /* Changes 'ofconn''s role to 'role'. If 'role' is NX_ROLE_MASTER then any
748 * existing master is demoted to a slave. */
750 ofconn_set_role(struct ofconn
*ofconn
, enum nx_role role
)
752 if (role
== NX_ROLE_MASTER
) {
753 struct ofconn
*other
;
755 HMAP_FOR_EACH (other
, hmap_node
, &ofconn
->connmgr
->controllers
) {
756 if (other
->role
== NX_ROLE_MASTER
) {
757 other
->role
= NX_ROLE_SLAVE
;
765 ofconn_set_invalid_ttl_to_controller(struct ofconn
*ofconn
, bool val
)
767 ofconn
->invalid_ttl_to_controller
= val
;
771 ofconn_get_invalid_ttl_to_controller(struct ofconn
*ofconn
)
773 return ofconn
->invalid_ttl_to_controller
;
776 /* Returns the currently configured flow format for 'ofconn', one of NXFF_*.
778 * The default, if no other format has been set, is NXFF_OPENFLOW10. */
780 ofconn_get_flow_format(struct ofconn
*ofconn
)
782 return ofconn
->flow_format
;
785 /* Sets the flow format for 'ofconn' to 'flow_format' (one of NXFF_*). */
787 ofconn_set_flow_format(struct ofconn
*ofconn
, enum nx_flow_format flow_format
)
789 ofconn
->flow_format
= flow_format
;
792 /* Returns the currently configured packet in format for 'ofconn', one of
795 * The default, if no other format has been set, is NXPIF_OPENFLOW10. */
796 enum nx_packet_in_format
797 ofconn_get_packet_in_format(struct ofconn
*ofconn
)
799 return ofconn
->packet_in_format
;
802 /* Sets the packet in format for 'ofconn' to 'packet_in_format' (one of
805 ofconn_set_packet_in_format(struct ofconn
*ofconn
,
806 enum nx_packet_in_format packet_in_format
)
808 ofconn
->packet_in_format
= packet_in_format
;
811 /* Returns true if the NXT_FLOW_MOD_TABLE_ID extension is enabled, false
814 * By default the extension is not enabled. */
816 ofconn_get_flow_mod_table_id(const struct ofconn
*ofconn
)
818 return ofconn
->flow_mod_table_id
;
821 /* Enables or disables (according to 'enable') the NXT_FLOW_MOD_TABLE_ID
822 * extension on 'ofconn'. */
824 ofconn_set_flow_mod_table_id(struct ofconn
*ofconn
, bool enable
)
826 ofconn
->flow_mod_table_id
= enable
;
829 /* Returns the default miss send length for 'ofconn'. */
831 ofconn_get_miss_send_len(const struct ofconn
*ofconn
)
833 return ofconn
->miss_send_len
;
836 /* Sets the default miss send length for 'ofconn' to 'miss_send_len'. */
838 ofconn_set_miss_send_len(struct ofconn
*ofconn
, int miss_send_len
)
840 ofconn
->miss_send_len
= miss_send_len
;
843 /* Sends 'msg' on 'ofconn', accounting it as a reply. (If there is a
844 * sufficient number of OpenFlow replies in-flight on a single ofconn, then the
845 * connmgr will stop accepting new OpenFlow requests on that ofconn until the
846 * controller has accepted some of the replies.) */
848 ofconn_send_reply(const struct ofconn
*ofconn
, struct ofpbuf
*msg
)
850 ofconn_send(ofconn
, msg
, ofconn
->reply_counter
);
853 /* Sends each of the messages in list 'replies' on 'ofconn' in order,
854 * accounting them as replies. */
856 ofconn_send_replies(const struct ofconn
*ofconn
, struct list
*replies
)
858 struct ofpbuf
*reply
, *next
;
860 LIST_FOR_EACH_SAFE (reply
, next
, list_node
, replies
) {
861 list_remove(&reply
->list_node
);
862 ofconn_send_reply(ofconn
, reply
);
866 /* Sends 'error' on 'ofconn', as a reply to 'request'. Only at most the
867 * first 64 bytes of 'request' are used. */
869 ofconn_send_error(const struct ofconn
*ofconn
,
870 const struct ofp_header
*request
, enum ofperr error
)
872 struct ofpbuf
*reply
;
874 reply
= ofperr_encode_reply(error
, request
);
876 static struct vlog_rate_limit err_rl
= VLOG_RATE_LIMIT_INIT(10, 10);
878 if (!VLOG_DROP_INFO(&err_rl
)) {
879 const struct ofputil_msg_type
*type
;
880 const char *type_name
;
883 request_len
= ntohs(request
->length
);
884 type_name
= (!ofputil_decode_msg_type_partial(request
,
885 MIN(64, request_len
),
887 ? ofputil_msg_type_name(type
)
890 VLOG_INFO("%s: sending %s error reply to %s message",
891 rconn_get_name(ofconn
->rconn
), ofperr_to_string(error
),
894 ofconn_send_reply(ofconn
, reply
);
898 /* Same as pktbuf_retrieve(), using the pktbuf owned by 'ofconn'. */
900 ofconn_pktbuf_retrieve(struct ofconn
*ofconn
, uint32_t id
,
901 struct ofpbuf
**bufferp
, uint16_t *in_port
)
903 return pktbuf_retrieve(ofconn
->pktbuf
, id
, bufferp
, in_port
);
906 /* Returns true if 'ofconn' has any pending opgroups. */
908 ofconn_has_pending_opgroups(const struct ofconn
*ofconn
)
910 return !list_is_empty(&ofconn
->opgroups
);
913 /* Adds 'ofconn_node' to 'ofconn''s list of pending opgroups.
915 * If 'ofconn' is destroyed or its connection drops, then 'ofconn' will remove
916 * 'ofconn_node' from the list and re-initialize it with list_init(). The
917 * client may, therefore, use list_is_empty(ofconn_node) to determine whether
918 * 'ofconn_node' is still associated with an active ofconn.
920 * The client may also remove ofconn_node from the list itself, with
923 ofconn_add_opgroup(struct ofconn
*ofconn
, struct list
*ofconn_node
)
925 list_push_back(&ofconn
->opgroups
, ofconn_node
);
928 /* Private ofconn functions. */
931 ofconn_get_target(const struct ofconn
*ofconn
)
933 return rconn_get_target(ofconn
->rconn
);
936 static struct ofconn
*
937 ofconn_create(struct connmgr
*mgr
, struct rconn
*rconn
, enum ofconn_type type
)
939 struct ofconn
*ofconn
;
941 ofconn
= xzalloc(sizeof *ofconn
);
942 ofconn
->connmgr
= mgr
;
943 list_push_back(&mgr
->all_conns
, &ofconn
->node
);
944 ofconn
->rconn
= rconn
;
947 list_init(&ofconn
->opgroups
);
949 ofconn_flush(ofconn
);
954 /* Clears all of the state in 'ofconn' that should not persist from one
955 * connection to the next. */
957 ofconn_flush(struct ofconn
*ofconn
)
961 ofconn
->role
= NX_ROLE_OTHER
;
962 ofconn
->flow_format
= NXFF_OPENFLOW10
;
963 ofconn
->packet_in_format
= NXPIF_OPENFLOW10
;
964 ofconn
->flow_mod_table_id
= false;
966 /* Disassociate 'ofconn' from all of the ofopgroups that it initiated that
967 * have not yet completed. (Those ofopgroups will still run to completion
968 * in the usual way, but any errors that they run into will not be reported
969 * on any OpenFlow channel.)
971 * Also discard any blocked operation on 'ofconn'. */
972 while (!list_is_empty(&ofconn
->opgroups
)) {
973 list_init(list_pop_front(&ofconn
->opgroups
));
975 ofpbuf_delete(ofconn
->blocked
);
976 ofconn
->blocked
= NULL
;
978 rconn_packet_counter_destroy(ofconn
->packet_in_counter
);
979 ofconn
->packet_in_counter
= rconn_packet_counter_create();
980 for (i
= 0; i
< N_SCHEDULERS
; i
++) {
981 if (ofconn
->schedulers
[i
]) {
984 pinsched_get_limits(ofconn
->schedulers
[i
], &rate
, &burst
);
985 pinsched_destroy(ofconn
->schedulers
[i
]);
986 ofconn
->schedulers
[i
] = pinsched_create(rate
, burst
);
989 if (ofconn
->pktbuf
) {
990 pktbuf_destroy(ofconn
->pktbuf
);
991 ofconn
->pktbuf
= pktbuf_create();
993 ofconn
->miss_send_len
= (ofconn
->type
== OFCONN_PRIMARY
994 ? OFP_DEFAULT_MISS_SEND_LEN
997 rconn_packet_counter_destroy(ofconn
->reply_counter
);
998 ofconn
->reply_counter
= rconn_packet_counter_create();
1002 ofconn_destroy(struct ofconn
*ofconn
)
1004 ofconn_flush(ofconn
);
1006 if (ofconn
->type
== OFCONN_PRIMARY
) {
1007 hmap_remove(&ofconn
->connmgr
->controllers
, &ofconn
->hmap_node
);
1010 list_remove(&ofconn
->node
);
1011 rconn_destroy(ofconn
->rconn
);
1012 rconn_packet_counter_destroy(ofconn
->packet_in_counter
);
1013 rconn_packet_counter_destroy(ofconn
->reply_counter
);
1014 pktbuf_destroy(ofconn
->pktbuf
);
1018 /* Reconfigures 'ofconn' to match 'c'. 'ofconn' and 'c' must have the same
1021 ofconn_reconfigure(struct ofconn
*ofconn
, const struct ofproto_controller
*c
)
1025 ofconn
->band
= c
->band
;
1027 rconn_set_max_backoff(ofconn
->rconn
, c
->max_backoff
);
1029 probe_interval
= c
->probe_interval
? MAX(c
->probe_interval
, 5) : 0;
1030 rconn_set_probe_interval(ofconn
->rconn
, probe_interval
);
1032 ofconn_set_rate_limit(ofconn
, c
->rate_limit
, c
->burst_limit
);
1035 /* Returns true if it makes sense for 'ofconn' to receive and process OpenFlow
1038 ofconn_may_recv(const struct ofconn
*ofconn
)
1040 int count
= rconn_packet_counter_read (ofconn
->reply_counter
);
1041 return (!ofconn
->blocked
|| ofconn
->retry
) && count
< OFCONN_REPLY_MAX
;
1045 ofconn_run(struct ofconn
*ofconn
,
1046 bool (*handle_openflow
)(struct ofconn
*, struct ofpbuf
*ofp_msg
))
1048 struct connmgr
*mgr
= ofconn
->connmgr
;
1051 for (i
= 0; i
< N_SCHEDULERS
; i
++) {
1052 pinsched_run(ofconn
->schedulers
[i
], do_send_packet_in
, ofconn
);
1055 rconn_run(ofconn
->rconn
);
1057 if (handle_openflow
) {
1058 /* Limit the number of iterations to avoid starving other tasks. */
1059 for (i
= 0; i
< 50 && ofconn_may_recv(ofconn
); i
++) {
1060 struct ofpbuf
*of_msg
;
1062 of_msg
= (ofconn
->blocked
1064 : rconn_recv(ofconn
->rconn
));
1068 if (mgr
->fail_open
) {
1069 fail_open_maybe_recover(mgr
->fail_open
);
1072 if (handle_openflow(ofconn
, of_msg
)) {
1073 ofpbuf_delete(of_msg
);
1074 ofconn
->blocked
= NULL
;
1076 ofconn
->blocked
= of_msg
;
1077 ofconn
->retry
= false;
1082 if (!rconn_is_alive(ofconn
->rconn
)) {
1083 ofconn_destroy(ofconn
);
1084 } else if (!rconn_is_connected(ofconn
->rconn
)) {
1085 ofconn_flush(ofconn
);
1090 ofconn_wait(struct ofconn
*ofconn
, bool handling_openflow
)
1094 for (i
= 0; i
< N_SCHEDULERS
; i
++) {
1095 pinsched_wait(ofconn
->schedulers
[i
]);
1097 rconn_run_wait(ofconn
->rconn
);
1098 if (handling_openflow
&& ofconn_may_recv(ofconn
)) {
1099 rconn_recv_wait(ofconn
->rconn
);
1103 /* Returns true if 'ofconn' should receive asynchronous messages. */
1105 ofconn_receives_async_msgs__(const struct ofconn
*ofconn
)
1107 if (ofconn
->type
== OFCONN_PRIMARY
) {
1108 /* Primary controllers always get asynchronous messages unless they
1109 * have configured themselves as "slaves". */
1110 return ofconn
->role
!= NX_ROLE_SLAVE
;
1112 /* Service connections don't get asynchronous messages unless they have
1113 * explicitly asked for them by setting a nonzero miss send length. */
1114 return ofconn
->miss_send_len
> 0;
1119 ofconn_receives_async_msgs(const struct ofconn
*ofconn
)
1121 if (!rconn_is_connected(ofconn
->rconn
)) {
1124 return ofconn_receives_async_msgs__(ofconn
);
1129 ofconn_interested_in_packet(const struct ofconn
*ofconn
,
1130 const struct ofputil_packet_in
*pin
)
1132 if (!rconn_is_connected(ofconn
->rconn
)) {
1134 } else if (pin
->reason
== OFPR_INVALID_TTL
) {
1135 return ofconn
->invalid_ttl_to_controller
;
1137 return ofconn_receives_async_msgs__(ofconn
);
1141 /* Returns a human-readable name for an OpenFlow connection between 'mgr' and
1142 * 'target', suitable for use in log messages for identifying the connection.
1144 * The name is dynamically allocated. The caller should free it (with free())
1145 * when it is no longer needed. */
1147 ofconn_make_name(const struct connmgr
*mgr
, const char *target
)
1149 return xasprintf("%s<->%s", mgr
->name
, target
);
1153 ofconn_set_rate_limit(struct ofconn
*ofconn
, int rate
, int burst
)
1157 for (i
= 0; i
< N_SCHEDULERS
; i
++) {
1158 struct pinsched
**s
= &ofconn
->schedulers
[i
];
1162 *s
= pinsched_create(rate
, burst
);
1164 pinsched_set_limits(*s
, rate
, burst
);
1167 pinsched_destroy(*s
);
1174 ofconn_send(const struct ofconn
*ofconn
, struct ofpbuf
*msg
,
1175 struct rconn_packet_counter
*counter
)
1177 update_openflow_length(msg
);
1178 if (rconn_send(ofconn
->rconn
, msg
, counter
)) {
1183 /* Sending asynchronous messages. */
1185 static void schedule_packet_in(struct ofconn
*, struct ofputil_packet_in
,
1186 const struct flow
*);
1188 /* Sends an OFPT_PORT_STATUS message with 'opp' and 'reason' to appropriate
1189 * controllers managed by 'mgr'. */
1191 connmgr_send_port_status(struct connmgr
*mgr
, const struct ofp_phy_port
*opp
,
1194 /* XXX Should limit the number of queued port status change messages. */
1195 struct ofconn
*ofconn
;
1197 LIST_FOR_EACH (ofconn
, node
, &mgr
->all_conns
) {
1198 struct ofp_port_status
*ops
;
1201 /* Primary controllers, even slaves, should always get port status
1202 updates. Otherwise obey ofconn_receives_async_msgs(). */
1203 if (ofconn
->type
!= OFCONN_PRIMARY
1204 && !ofconn_receives_async_msgs(ofconn
)) {
1208 ops
= make_openflow_xid(sizeof *ops
, OFPT_PORT_STATUS
, 0, &b
);
1209 ops
->reason
= reason
;
1211 ofconn_send(ofconn
, b
, NULL
);
1215 /* Sends an OFPT_FLOW_REMOVED or NXT_FLOW_REMOVED message based on 'fr' to
1216 * appropriate controllers managed by 'mgr'. */
1218 connmgr_send_flow_removed(struct connmgr
*mgr
,
1219 const struct ofputil_flow_removed
*fr
)
1221 struct ofconn
*ofconn
;
1223 LIST_FOR_EACH (ofconn
, node
, &mgr
->all_conns
) {
1226 if (!ofconn_receives_async_msgs(ofconn
)) {
1230 /* Account flow expirations as replies to OpenFlow requests. That
1231 * works because preventing OpenFlow requests from being processed also
1232 * prevents new flows from being added (and expiring). (It also
1233 * prevents processing OpenFlow requests that would not add new flows,
1234 * so it is imperfect.) */
1235 msg
= ofputil_encode_flow_removed(fr
, ofconn
->flow_format
);
1236 ofconn_send_reply(ofconn
, msg
);
1240 /* Given 'pin', sends an OFPT_PACKET_IN message to each OpenFlow controller as
1241 * necessary according to their individual configurations. */
1243 connmgr_send_packet_in(struct connmgr
*mgr
,
1244 const struct ofputil_packet_in
*pin
,
1245 const struct flow
*flow
)
1247 struct ofconn
*ofconn
;
1249 LIST_FOR_EACH (ofconn
, node
, &mgr
->all_conns
) {
1250 if (ofconn_interested_in_packet(ofconn
, pin
)) {
1251 schedule_packet_in(ofconn
, *pin
, flow
);
1256 /* pinsched callback for sending 'ofp_packet_in' on 'ofconn'. */
1258 do_send_packet_in(struct ofpbuf
*ofp_packet_in
, void *ofconn_
)
1260 struct ofconn
*ofconn
= ofconn_
;
1262 rconn_send_with_limit(ofconn
->rconn
, ofp_packet_in
,
1263 ofconn
->packet_in_counter
, 100);
1266 /* Takes 'pin', whose packet has the flow specified by 'flow', composes an
1267 * OpenFlow packet-in message from it, and passes it to 'ofconn''s packet
1268 * scheduler for sending. */
1270 schedule_packet_in(struct ofconn
*ofconn
, struct ofputil_packet_in pin
,
1271 const struct flow
*flow
)
1273 struct connmgr
*mgr
= ofconn
->connmgr
;
1275 /* Get OpenFlow buffer_id. */
1276 if (pin
.reason
== OFPR_ACTION
) {
1277 pin
.buffer_id
= UINT32_MAX
;
1278 } else if (mgr
->fail_open
&& fail_open_is_active(mgr
->fail_open
)) {
1279 pin
.buffer_id
= pktbuf_get_null();
1280 } else if (!ofconn
->pktbuf
) {
1281 pin
.buffer_id
= UINT32_MAX
;
1283 pin
.buffer_id
= pktbuf_save(ofconn
->pktbuf
, pin
.packet
, pin
.packet_len
,
1287 /* Figure out how much of the packet to send. */
1288 if (pin
.reason
== OFPR_NO_MATCH
) {
1289 pin
.send_len
= pin
.packet_len
;
1291 /* Caller should have initialized 'send_len' to 'max_len' specified in
1292 * struct ofp_action_output. */
1294 if (pin
.buffer_id
!= UINT32_MAX
) {
1295 pin
.send_len
= MIN(pin
.send_len
, ofconn
->miss_send_len
);
1298 /* Make OFPT_PACKET_IN and hand over to packet scheduler. It might
1299 * immediately call into do_send_packet_in() or it might buffer it for a
1300 * while (until a later call to pinsched_run()). */
1301 pinsched_send(ofconn
->schedulers
[pin
.reason
== OFPR_NO_MATCH
? 0 : 1],
1303 ofputil_encode_packet_in(&pin
, ofconn
->packet_in_format
),
1304 do_send_packet_in
, ofconn
);
1307 /* Fail-open settings. */
1309 /* Returns the failure handling mode (OFPROTO_FAIL_SECURE or
1310 * OFPROTO_FAIL_STANDALONE) for 'mgr'. */
1311 enum ofproto_fail_mode
1312 connmgr_get_fail_mode(const struct connmgr
*mgr
)
1314 return mgr
->fail_mode
;
1317 /* Sets the failure handling mode for 'mgr' to 'fail_mode' (either
1318 * OFPROTO_FAIL_SECURE or OFPROTO_FAIL_STANDALONE). */
1320 connmgr_set_fail_mode(struct connmgr
*mgr
, enum ofproto_fail_mode fail_mode
)
1322 if (mgr
->fail_mode
!= fail_mode
) {
1323 mgr
->fail_mode
= fail_mode
;
1324 update_fail_open(mgr
);
1325 if (!connmgr_has_controllers(mgr
)) {
1326 ofproto_flush_flows(mgr
->ofproto
);
1331 /* Fail-open implementation. */
1333 /* Returns the longest probe interval among the primary controllers configured
1334 * on 'mgr'. Returns 0 if there are no primary controllers. */
1336 connmgr_get_max_probe_interval(const struct connmgr
*mgr
)
1338 const struct ofconn
*ofconn
;
1339 int max_probe_interval
;
1341 max_probe_interval
= 0;
1342 HMAP_FOR_EACH (ofconn
, hmap_node
, &mgr
->controllers
) {
1343 int probe_interval
= rconn_get_probe_interval(ofconn
->rconn
);
1344 max_probe_interval
= MAX(max_probe_interval
, probe_interval
);
1346 return max_probe_interval
;
1349 /* Returns the number of seconds for which all of 'mgr's primary controllers
1350 * have been disconnected. Returns 0 if 'mgr' has no primary controllers. */
1352 connmgr_failure_duration(const struct connmgr
*mgr
)
1354 const struct ofconn
*ofconn
;
1355 int min_failure_duration
;
1357 if (!connmgr_has_controllers(mgr
)) {
1361 min_failure_duration
= INT_MAX
;
1362 HMAP_FOR_EACH (ofconn
, hmap_node
, &mgr
->controllers
) {
1363 int failure_duration
= rconn_failure_duration(ofconn
->rconn
);
1364 min_failure_duration
= MIN(min_failure_duration
, failure_duration
);
1366 return min_failure_duration
;
1369 /* Returns true if at least one primary controller is connected (regardless of
1370 * whether those controllers are believed to have authenticated and accepted
1371 * this switch), false if none of them are connected. */
1373 connmgr_is_any_controller_connected(const struct connmgr
*mgr
)
1375 const struct ofconn
*ofconn
;
1377 HMAP_FOR_EACH (ofconn
, hmap_node
, &mgr
->controllers
) {
1378 if (rconn_is_connected(ofconn
->rconn
)) {
1385 /* Returns true if at least one primary controller is believed to have
1386 * authenticated and accepted this switch, false otherwise. */
1388 connmgr_is_any_controller_admitted(const struct connmgr
*mgr
)
1390 const struct ofconn
*ofconn
;
1392 HMAP_FOR_EACH (ofconn
, hmap_node
, &mgr
->controllers
) {
1393 if (rconn_is_admitted(ofconn
->rconn
)) {
1400 /* Sends 'packet' to each controller connected to 'mgr'. Takes ownership of
1403 connmgr_broadcast(struct connmgr
*mgr
, struct ofpbuf
*packet
)
1405 struct ofconn
*ofconn
, *prev
;
1408 LIST_FOR_EACH (ofconn
, node
, &mgr
->all_conns
) {
1410 ofconn_send_reply(ofconn
, ofpbuf_clone(packet
));
1412 if (rconn_is_connected(ofconn
->rconn
)) {
1417 ofconn_send_reply(prev
, packet
);
1419 ofpbuf_delete(packet
);
1423 /* In-band configuration. */
1425 static bool any_extras_changed(const struct connmgr
*,
1426 const struct sockaddr_in
*extras
, size_t n
);
1428 /* Sets the 'n' TCP port addresses in 'extras' as ones to which 'mgr''s
1429 * in-band control should guarantee access, in the same way that in-band
1430 * control guarantees access to OpenFlow controllers. */
1432 connmgr_set_extra_in_band_remotes(struct connmgr
*mgr
,
1433 const struct sockaddr_in
*extras
, size_t n
)
1435 if (!any_extras_changed(mgr
, extras
, n
)) {
1439 free(mgr
->extra_in_band_remotes
);
1440 mgr
->n_extra_remotes
= n
;
1441 mgr
->extra_in_band_remotes
= xmemdup(extras
, n
* sizeof *extras
);
1443 update_in_band_remotes(mgr
);
1446 /* Sets the OpenFlow queue used by flows set up by in-band control on
1447 * 'mgr' to 'queue_id'. If 'queue_id' is negative, then in-band control
1448 * flows will use the default queue. */
1450 connmgr_set_in_band_queue(struct connmgr
*mgr
, int queue_id
)
1452 if (queue_id
!= mgr
->in_band_queue
) {
1453 mgr
->in_band_queue
= queue_id
;
1454 update_in_band_remotes(mgr
);
1459 any_extras_changed(const struct connmgr
*mgr
,
1460 const struct sockaddr_in
*extras
, size_t n
)
1464 if (n
!= mgr
->n_extra_remotes
) {
1468 for (i
= 0; i
< n
; i
++) {
1469 const struct sockaddr_in
*old
= &mgr
->extra_in_band_remotes
[i
];
1470 const struct sockaddr_in
*new = &extras
[i
];
1472 if (old
->sin_addr
.s_addr
!= new->sin_addr
.s_addr
||
1473 old
->sin_port
!= new->sin_port
) {
1481 /* In-band implementation. */
1484 connmgr_msg_in_hook(struct connmgr
*mgr
, const struct flow
*flow
,
1485 const struct ofpbuf
*packet
)
1487 return mgr
->in_band
&& in_band_msg_in_hook(mgr
->in_band
, flow
, packet
);
1491 connmgr_may_set_up_flow(struct connmgr
*mgr
, const struct flow
*flow
,
1492 const struct nlattr
*odp_actions
,
1495 return !mgr
->in_band
|| in_band_rule_check(flow
, odp_actions
, actions_len
);
1498 /* Fail-open and in-band implementation. */
1500 /* Called by 'ofproto' after all flows have been flushed, to allow fail-open
1501 * and standalone mode to re-create their flows.
1503 * In-band control has more sophisticated code that manages flows itself. */
1505 connmgr_flushed(struct connmgr
*mgr
)
1507 if (mgr
->fail_open
) {
1508 fail_open_flushed(mgr
->fail_open
);
1511 /* If there are no controllers and we're in standalone mode, set up a flow
1512 * that matches every packet and directs them to OFPP_NORMAL (which goes to
1513 * us). Otherwise, the switch is in secure mode and we won't pass any
1514 * traffic until a controller has been defined and it tells us to do so. */
1515 if (!connmgr_has_controllers(mgr
)
1516 && mgr
->fail_mode
== OFPROTO_FAIL_STANDALONE
) {
1517 union ofp_action action
;
1518 struct cls_rule rule
;
1520 memset(&action
, 0, sizeof action
);
1521 action
.type
= htons(OFPAT_OUTPUT
);
1522 action
.output
.len
= htons(sizeof action
);
1523 action
.output
.port
= htons(OFPP_NORMAL
);
1524 cls_rule_init_catchall(&rule
, 0);
1525 ofproto_add_flow(mgr
->ofproto
, &rule
, &action
, 1);
1529 /* Creates a new ofservice for 'target' in 'mgr'. Returns 0 if successful,
1530 * otherwise a positive errno value.
1532 * ofservice_reconfigure() must be called to fully configure the new
1535 ofservice_create(struct connmgr
*mgr
, const char *target
)
1537 struct ofservice
*ofservice
;
1538 struct pvconn
*pvconn
;
1541 error
= pvconn_open(target
, &pvconn
);
1546 ofservice
= xzalloc(sizeof *ofservice
);
1547 hmap_insert(&mgr
->services
, &ofservice
->node
, hash_string(target
, 0));
1548 ofservice
->pvconn
= pvconn
;
1554 ofservice_destroy(struct connmgr
*mgr
, struct ofservice
*ofservice
)
1556 hmap_remove(&mgr
->services
, &ofservice
->node
);
1557 pvconn_close(ofservice
->pvconn
);
1562 ofservice_reconfigure(struct ofservice
*ofservice
,
1563 const struct ofproto_controller
*c
)
1565 ofservice
->probe_interval
= c
->probe_interval
;
1566 ofservice
->rate_limit
= c
->rate_limit
;
1567 ofservice
->burst_limit
= c
->burst_limit
;
1570 /* Finds and returns the ofservice within 'mgr' that has the given
1571 * 'target', or a null pointer if none exists. */
1572 static struct ofservice
*
1573 ofservice_lookup(struct connmgr
*mgr
, const char *target
)
1575 struct ofservice
*ofservice
;
1577 HMAP_FOR_EACH_WITH_HASH (ofservice
, node
, hash_string(target
, 0),
1579 if (!strcmp(pvconn_get_name(ofservice
->pvconn
), target
)) {