2 * Copyright (c) 2009, 2010, 2011, 2012, 2013, 2014 Nicira, Inc.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at:
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
25 #include "dynamic-string.h"
26 #include "fail-open.h"
29 #include "ofp-actions.h"
33 #include "ofproto-provider.h"
35 #include "poll-loop.h"
47 VLOG_DEFINE_THIS_MODULE(connmgr
);
48 static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(1, 5);
50 /* An OpenFlow connection.
56 * 'ofproto_mutex' must be held whenever an ofconn is created or destroyed or,
57 * more or less equivalently, whenever an ofconn is added to or removed from a
58 * connmgr. 'ofproto_mutex' doesn't protect the data inside the ofconn, except
59 * as specifically noted below. */
61 /* Configuration that persists from one connection to the next. */
63 struct list node
; /* In struct connmgr's "all_conns" list. */
64 struct hmap_node hmap_node
; /* In struct connmgr's "controllers" map. */
66 struct connmgr
*connmgr
; /* Connection's manager. */
67 struct rconn
*rconn
; /* OpenFlow connection. */
68 enum ofconn_type type
; /* Type. */
69 enum ofproto_band band
; /* In-band or out-of-band? */
70 bool enable_async_msgs
; /* Initially enable async messages? */
72 /* State that should be cleared from one connection to the next. */
75 enum ofp12_controller_role role
; /* Role. */
76 enum ofputil_protocol protocol
; /* Current protocol variant. */
77 enum nx_packet_in_format packet_in_format
; /* OFPT_PACKET_IN format. */
79 /* OFPT_PACKET_IN related data. */
80 struct rconn_packet_counter
*packet_in_counter
; /* # queued on 'rconn'. */
81 #define N_SCHEDULERS 2
82 struct pinsched
*schedulers
[N_SCHEDULERS
];
83 struct pktbuf
*pktbuf
; /* OpenFlow packet buffers. */
84 int miss_send_len
; /* Bytes to send of buffered packets. */
85 uint16_t controller_id
; /* Connection controller ID. */
87 /* Number of OpenFlow messages queued on 'rconn' as replies to OpenFlow
88 * requests, and the maximum number before we stop reading OpenFlow
90 #define OFCONN_REPLY_MAX 100
91 struct rconn_packet_counter
*reply_counter
;
93 /* Asynchronous message configuration in each possible roles.
95 * A 1-bit enables sending an asynchronous message for one possible reason
96 * that the message might be generated, a 0-bit disables it. */
97 uint32_t master_async_config
[OAM_N_TYPES
]; /* master, other */
98 uint32_t slave_async_config
[OAM_N_TYPES
]; /* slave */
100 /* Flow table operation logging. */
101 int n_add
, n_delete
, n_modify
; /* Number of unreported ops of each kind. */
102 long long int first_op
, last_op
; /* Range of times for unreported ops. */
103 long long int next_op_report
; /* Time to report ops, or LLONG_MAX. */
104 long long int op_backoff
; /* Earliest time to report ops again. */
106 /* Flow monitors (e.g. NXST_FLOW_MONITOR). */
108 /* Configuration. Contains "struct ofmonitor"s. */
109 struct hmap monitors
OVS_GUARDED_BY(ofproto_mutex
);
113 * When too many flow monitor notifications back up in the transmit buffer,
114 * we pause the transmission of further notifications. These members track
115 * the flow control state.
117 * When notifications are flowing, 'monitor_paused' is 0. When
118 * notifications are paused, 'monitor_paused' is the value of
119 * 'monitor_seqno' at the point we paused.
121 * 'monitor_counter' counts the OpenFlow messages and bytes currently in
122 * flight. This value growing too large triggers pausing. */
123 uint64_t monitor_paused
OVS_GUARDED_BY(ofproto_mutex
);
124 struct rconn_packet_counter
*monitor_counter
OVS_GUARDED_BY(ofproto_mutex
);
126 /* State of monitors for a single ongoing flow_mod.
128 * 'updates' is a list of "struct ofpbuf"s that contain
129 * NXST_FLOW_MONITOR_REPLY messages representing the changes made by the
132 * When 'updates' is nonempty, 'sent_abbrev_update' is true if 'updates'
133 * contains an update event of type NXFME_ABBREV and false otherwise.. */
134 struct list updates
OVS_GUARDED_BY(ofproto_mutex
);
135 bool sent_abbrev_update
OVS_GUARDED_BY(ofproto_mutex
);
137 /* Active bundles. Contains "struct ofp_bundle"s. */
141 static struct ofconn
*ofconn_create(struct connmgr
*, struct rconn
*,
142 enum ofconn_type
, bool enable_async_msgs
)
143 OVS_REQUIRES(ofproto_mutex
);
144 static void ofconn_destroy(struct ofconn
*) OVS_REQUIRES(ofproto_mutex
);
145 static void ofconn_flush(struct ofconn
*) OVS_REQUIRES(ofproto_mutex
);
147 static void ofconn_reconfigure(struct ofconn
*,
148 const struct ofproto_controller
*);
150 static void ofconn_run(struct ofconn
*,
151 void (*handle_openflow
)(struct ofconn
*,
152 const struct ofpbuf
*ofp_msg
));
153 static void ofconn_wait(struct ofconn
*);
155 static void ofconn_log_flow_mods(struct ofconn
*);
157 static const char *ofconn_get_target(const struct ofconn
*);
158 static char *ofconn_make_name(const struct connmgr
*, const char *target
);
160 static void ofconn_set_rate_limit(struct ofconn
*, int rate
, int burst
);
162 static void ofconn_send(const struct ofconn
*, struct ofpbuf
*,
163 struct rconn_packet_counter
*);
165 static void do_send_packet_ins(struct ofconn
*, struct list
*txq
);
167 /* A listener for incoming OpenFlow "service" connections. */
169 struct hmap_node node
; /* In struct connmgr's "services" hmap. */
170 struct pvconn
*pvconn
; /* OpenFlow connection listener. */
172 /* These are not used by ofservice directly. They are settings for
173 * accepted "struct ofconn"s from the pvconn. */
174 int probe_interval
; /* Max idle time before probing, in seconds. */
175 int rate_limit
; /* Max packet-in rate in packets per second. */
176 int burst_limit
; /* Limit on accumulating packet credits. */
177 bool enable_async_msgs
; /* Initially enable async messages? */
178 uint8_t dscp
; /* DSCP Value for controller connection */
179 uint32_t allowed_versions
; /* OpenFlow protocol versions that may
180 * be negotiated for a session. */
183 static void ofservice_reconfigure(struct ofservice
*,
184 const struct ofproto_controller
*);
185 static int ofservice_create(struct connmgr
*mgr
, const char *target
,
186 uint32_t allowed_versions
, uint8_t dscp
);
187 static void ofservice_destroy(struct connmgr
*, struct ofservice
*);
188 static struct ofservice
*ofservice_lookup(struct connmgr
*,
191 /* Connection manager for an OpenFlow switch. */
193 struct ofproto
*ofproto
;
195 char *local_port_name
;
197 /* OpenFlow connections. */
198 struct hmap controllers
; /* All OFCONN_PRIMARY controllers. */
199 struct list all_conns
; /* All controllers. */
200 uint64_t master_election_id
; /* monotonically increasing sequence number
201 * for master election */
202 bool master_election_id_defined
;
204 /* OpenFlow listeners. */
205 struct hmap services
; /* Contains "struct ofservice"s. */
206 struct pvconn
**snoops
;
210 struct fail_open
*fail_open
;
211 enum ofproto_fail_mode fail_mode
;
213 /* In-band control. */
214 struct in_band
*in_band
;
215 struct sockaddr_in
*extra_in_band_remotes
;
216 size_t n_extra_remotes
;
220 static void update_in_band_remotes(struct connmgr
*);
221 static void add_snooper(struct connmgr
*, struct vconn
*);
222 static void ofmonitor_run(struct connmgr
*);
223 static void ofmonitor_wait(struct connmgr
*);
225 /* Creates and returns a new connection manager owned by 'ofproto'. 'name' is
226 * a name for the ofproto suitable for using in log messages.
227 * 'local_port_name' is the name of the local port (OFPP_LOCAL) within
230 connmgr_create(struct ofproto
*ofproto
,
231 const char *name
, const char *local_port_name
)
235 mgr
= xmalloc(sizeof *mgr
);
236 mgr
->ofproto
= ofproto
;
237 mgr
->name
= xstrdup(name
);
238 mgr
->local_port_name
= xstrdup(local_port_name
);
240 hmap_init(&mgr
->controllers
);
241 list_init(&mgr
->all_conns
);
242 mgr
->master_election_id
= 0;
243 mgr
->master_election_id_defined
= false;
245 hmap_init(&mgr
->services
);
249 mgr
->fail_open
= NULL
;
250 mgr
->fail_mode
= OFPROTO_FAIL_SECURE
;
253 mgr
->extra_in_band_remotes
= NULL
;
254 mgr
->n_extra_remotes
= 0;
255 mgr
->in_band_queue
= -1;
260 /* Frees 'mgr' and all of its resources. */
262 connmgr_destroy(struct connmgr
*mgr
)
264 struct ofservice
*ofservice
, *next_ofservice
;
265 struct ofconn
*ofconn
, *next_ofconn
;
272 ovs_mutex_lock(&ofproto_mutex
);
273 LIST_FOR_EACH_SAFE (ofconn
, next_ofconn
, node
, &mgr
->all_conns
) {
274 ofconn_destroy(ofconn
);
276 ovs_mutex_unlock(&ofproto_mutex
);
278 hmap_destroy(&mgr
->controllers
);
280 HMAP_FOR_EACH_SAFE (ofservice
, next_ofservice
, node
, &mgr
->services
) {
281 ofservice_destroy(mgr
, ofservice
);
283 hmap_destroy(&mgr
->services
);
285 for (i
= 0; i
< mgr
->n_snoops
; i
++) {
286 pvconn_close(mgr
->snoops
[i
]);
290 fail_open_destroy(mgr
->fail_open
);
291 mgr
->fail_open
= NULL
;
293 in_band_destroy(mgr
->in_band
);
295 free(mgr
->extra_in_band_remotes
);
297 free(mgr
->local_port_name
);
302 /* Does all of the periodic maintenance required by 'mgr'. Calls
303 * 'handle_openflow' for each message received on an OpenFlow connection,
304 * passing along the OpenFlow connection itself and the message that was sent.
305 * 'handle_openflow' must not modify or free the message. */
307 connmgr_run(struct connmgr
*mgr
,
308 void (*handle_openflow
)(struct ofconn
*,
309 const struct ofpbuf
*ofp_msg
))
310 OVS_EXCLUDED(ofproto_mutex
)
312 struct ofconn
*ofconn
, *next_ofconn
;
313 struct ofservice
*ofservice
;
317 if (!in_band_run(mgr
->in_band
)) {
318 in_band_destroy(mgr
->in_band
);
323 LIST_FOR_EACH_SAFE (ofconn
, next_ofconn
, node
, &mgr
->all_conns
) {
324 ofconn_run(ofconn
, handle_openflow
);
328 /* Fail-open maintenance. Do this after processing the ofconns since
329 * fail-open checks the status of the controller rconn. */
330 if (mgr
->fail_open
) {
331 fail_open_run(mgr
->fail_open
);
334 HMAP_FOR_EACH (ofservice
, node
, &mgr
->services
) {
338 retval
= pvconn_accept(ofservice
->pvconn
, &vconn
);
343 /* Passing default value for creation of the rconn */
344 rconn
= rconn_create(ofservice
->probe_interval
, 0, ofservice
->dscp
,
345 vconn_get_allowed_versions(vconn
));
346 name
= ofconn_make_name(mgr
, vconn_get_name(vconn
));
347 rconn_connect_unreliably(rconn
, vconn
, name
);
350 ovs_mutex_lock(&ofproto_mutex
);
351 ofconn
= ofconn_create(mgr
, rconn
, OFCONN_SERVICE
,
352 ofservice
->enable_async_msgs
);
353 ovs_mutex_unlock(&ofproto_mutex
);
355 ofconn_set_rate_limit(ofconn
, ofservice
->rate_limit
,
356 ofservice
->burst_limit
);
357 } else if (retval
!= EAGAIN
) {
358 VLOG_WARN_RL(&rl
, "accept failed (%s)", ovs_strerror(retval
));
362 for (i
= 0; i
< mgr
->n_snoops
; i
++) {
366 retval
= pvconn_accept(mgr
->snoops
[i
], &vconn
);
368 add_snooper(mgr
, vconn
);
369 } else if (retval
!= EAGAIN
) {
370 VLOG_WARN_RL(&rl
, "accept failed (%s)", ovs_strerror(retval
));
375 /* Causes the poll loop to wake up when connmgr_run() needs to run. */
377 connmgr_wait(struct connmgr
*mgr
)
379 struct ofservice
*ofservice
;
380 struct ofconn
*ofconn
;
383 LIST_FOR_EACH (ofconn
, node
, &mgr
->all_conns
) {
388 in_band_wait(mgr
->in_band
);
390 if (mgr
->fail_open
) {
391 fail_open_wait(mgr
->fail_open
);
393 HMAP_FOR_EACH (ofservice
, node
, &mgr
->services
) {
394 pvconn_wait(ofservice
->pvconn
);
396 for (i
= 0; i
< mgr
->n_snoops
; i
++) {
397 pvconn_wait(mgr
->snoops
[i
]);
401 /* Adds some memory usage statistics for 'mgr' into 'usage', for use with
402 * memory_report(). */
404 connmgr_get_memory_usage(const struct connmgr
*mgr
, struct simap
*usage
)
406 const struct ofconn
*ofconn
;
407 unsigned int packets
= 0;
408 unsigned int ofconns
= 0;
410 LIST_FOR_EACH (ofconn
, node
, &mgr
->all_conns
) {
415 packets
+= rconn_count_txqlen(ofconn
->rconn
);
416 for (i
= 0; i
< N_SCHEDULERS
; i
++) {
417 struct pinsched_stats stats
;
419 pinsched_get_stats(ofconn
->schedulers
[i
], &stats
);
420 packets
+= stats
.n_queued
;;
422 packets
+= pktbuf_count_packets(ofconn
->pktbuf
);
424 simap_increase(usage
, "ofconns", ofconns
);
425 simap_increase(usage
, "packets", packets
);
428 /* Returns the ofproto that owns 'ofconn''s connmgr. */
430 ofconn_get_ofproto(const struct ofconn
*ofconn
)
432 return ofconn
->connmgr
->ofproto
;
435 /* OpenFlow configuration. */
437 static void add_controller(struct connmgr
*, const char *target
, uint8_t dscp
,
438 uint32_t allowed_versions
)
439 OVS_REQUIRES(ofproto_mutex
);
440 static struct ofconn
*find_controller_by_target(struct connmgr
*,
442 static void update_fail_open(struct connmgr
*) OVS_EXCLUDED(ofproto_mutex
);
443 static int set_pvconns(struct pvconn
***pvconnsp
, size_t *n_pvconnsp
,
444 const struct sset
*);
446 /* Returns true if 'mgr' has any configured primary controllers.
448 * Service controllers do not count, but configured primary controllers do
449 * count whether or not they are currently connected. */
451 connmgr_has_controllers(const struct connmgr
*mgr
)
453 return !hmap_is_empty(&mgr
->controllers
);
456 /* Initializes 'info' and populates it with information about each configured
457 * primary controller. The keys in 'info' are the controllers' targets; the
458 * data values are corresponding "struct ofproto_controller_info".
460 * The caller owns 'info' and everything in it and should free it when it is no
463 connmgr_get_controller_info(struct connmgr
*mgr
, struct shash
*info
)
465 const struct ofconn
*ofconn
;
467 HMAP_FOR_EACH (ofconn
, hmap_node
, &mgr
->controllers
) {
468 const struct rconn
*rconn
= ofconn
->rconn
;
469 const char *target
= rconn_get_target(rconn
);
471 if (!shash_find(info
, target
)) {
472 struct ofproto_controller_info
*cinfo
= xmalloc(sizeof *cinfo
);
473 time_t now
= time_now();
474 time_t last_connection
= rconn_get_last_connection(rconn
);
475 time_t last_disconnect
= rconn_get_last_disconnect(rconn
);
476 int last_error
= rconn_get_last_error(rconn
);
479 shash_add(info
, target
, cinfo
);
481 cinfo
->is_connected
= rconn_is_connected(rconn
);
482 cinfo
->role
= ofconn
->role
;
484 smap_init(&cinfo
->pairs
);
486 smap_add(&cinfo
->pairs
, "last_error",
487 ovs_retval_to_string(last_error
));
490 smap_add(&cinfo
->pairs
, "state", rconn_get_state(rconn
));
492 if (last_connection
!= TIME_MIN
) {
493 smap_add_format(&cinfo
->pairs
, "sec_since_connect",
494 "%ld", (long int) (now
- last_connection
));
497 if (last_disconnect
!= TIME_MIN
) {
498 smap_add_format(&cinfo
->pairs
, "sec_since_disconnect",
499 "%ld", (long int) (now
- last_disconnect
));
502 for (i
= 0; i
< N_SCHEDULERS
; i
++) {
503 if (ofconn
->schedulers
[i
]) {
504 const char *name
= i
? "miss" : "action";
505 struct pinsched_stats stats
;
507 pinsched_get_stats(ofconn
->schedulers
[i
], &stats
);
508 smap_add_nocopy(&cinfo
->pairs
,
509 xasprintf("packet-in-%s-backlog", name
),
510 xasprintf("%u", stats
.n_queued
));
511 smap_add_nocopy(&cinfo
->pairs
,
512 xasprintf("packet-in-%s-bypassed", name
),
513 xasprintf("%llu", stats
.n_normal
));
514 smap_add_nocopy(&cinfo
->pairs
,
515 xasprintf("packet-in-%s-queued", name
),
516 xasprintf("%llu", stats
.n_limited
));
517 smap_add_nocopy(&cinfo
->pairs
,
518 xasprintf("packet-in-%s-dropped", name
),
519 xasprintf("%llu", stats
.n_queue_dropped
));
527 connmgr_free_controller_info(struct shash
*info
)
529 struct shash_node
*node
;
531 SHASH_FOR_EACH (node
, info
) {
532 struct ofproto_controller_info
*cinfo
= node
->data
;
533 smap_destroy(&cinfo
->pairs
);
539 /* Changes 'mgr''s set of controllers to the 'n_controllers' controllers in
542 connmgr_set_controllers(struct connmgr
*mgr
,
543 const struct ofproto_controller
*controllers
,
544 size_t n_controllers
, uint32_t allowed_versions
)
545 OVS_EXCLUDED(ofproto_mutex
)
547 bool had_controllers
= connmgr_has_controllers(mgr
);
548 struct shash new_controllers
;
549 struct ofconn
*ofconn
, *next_ofconn
;
550 struct ofservice
*ofservice
, *next_ofservice
;
553 /* Required to add and remove ofconns. This could probably be narrowed to
554 * cover a smaller amount of code, if that yielded some benefit. */
555 ovs_mutex_lock(&ofproto_mutex
);
557 /* Create newly configured controllers and services.
558 * Create a name to ofproto_controller mapping in 'new_controllers'. */
559 shash_init(&new_controllers
);
560 for (i
= 0; i
< n_controllers
; i
++) {
561 const struct ofproto_controller
*c
= &controllers
[i
];
563 if (!vconn_verify_name(c
->target
)) {
565 ofconn
= find_controller_by_target(mgr
, c
->target
);
567 VLOG_INFO("%s: added primary controller \"%s\"",
568 mgr
->name
, c
->target
);
570 } else if (rconn_get_allowed_versions(ofconn
->rconn
) !=
572 VLOG_INFO("%s: re-added primary controller \"%s\"",
573 mgr
->name
, c
->target
);
575 ofconn_destroy(ofconn
);
578 add_controller(mgr
, c
->target
, c
->dscp
, allowed_versions
);
580 } else if (!pvconn_verify_name(c
->target
)) {
582 ofservice
= ofservice_lookup(mgr
, c
->target
);
584 VLOG_INFO("%s: added service controller \"%s\"",
585 mgr
->name
, c
->target
);
587 } else if (ofservice
->allowed_versions
!= allowed_versions
) {
588 VLOG_INFO("%s: re-added service controller \"%s\"",
589 mgr
->name
, c
->target
);
590 ofservice_destroy(mgr
, ofservice
);
594 ofservice_create(mgr
, c
->target
, allowed_versions
, c
->dscp
);
597 VLOG_WARN_RL(&rl
, "%s: unsupported controller \"%s\"",
598 mgr
->name
, c
->target
);
602 shash_add_once(&new_controllers
, c
->target
, &controllers
[i
]);
605 /* Delete controllers that are no longer configured.
606 * Update configuration of all now-existing controllers. */
607 HMAP_FOR_EACH_SAFE (ofconn
, next_ofconn
, hmap_node
, &mgr
->controllers
) {
608 const char *target
= ofconn_get_target(ofconn
);
609 struct ofproto_controller
*c
;
611 c
= shash_find_data(&new_controllers
, target
);
613 VLOG_INFO("%s: removed primary controller \"%s\"",
615 ofconn_destroy(ofconn
);
617 ofconn_reconfigure(ofconn
, c
);
621 /* Delete services that are no longer configured.
622 * Update configuration of all now-existing services. */
623 HMAP_FOR_EACH_SAFE (ofservice
, next_ofservice
, node
, &mgr
->services
) {
624 const char *target
= pvconn_get_name(ofservice
->pvconn
);
625 struct ofproto_controller
*c
;
627 c
= shash_find_data(&new_controllers
, target
);
629 VLOG_INFO("%s: removed service controller \"%s\"",
631 ofservice_destroy(mgr
, ofservice
);
633 ofservice_reconfigure(ofservice
, c
);
637 shash_destroy(&new_controllers
);
639 ovs_mutex_unlock(&ofproto_mutex
);
641 update_in_band_remotes(mgr
);
642 update_fail_open(mgr
);
643 if (had_controllers
!= connmgr_has_controllers(mgr
)) {
644 ofproto_flush_flows(mgr
->ofproto
);
648 /* Drops the connections between 'mgr' and all of its primary and secondary
649 * controllers, forcing them to reconnect. */
651 connmgr_reconnect(const struct connmgr
*mgr
)
653 struct ofconn
*ofconn
;
655 LIST_FOR_EACH (ofconn
, node
, &mgr
->all_conns
) {
656 rconn_reconnect(ofconn
->rconn
);
660 /* Sets the "snoops" for 'mgr' to the pvconn targets listed in 'snoops'.
662 * A "snoop" is a pvconn to which every OpenFlow message to or from the most
663 * important controller on 'mgr' is mirrored. */
665 connmgr_set_snoops(struct connmgr
*mgr
, const struct sset
*snoops
)
667 return set_pvconns(&mgr
->snoops
, &mgr
->n_snoops
, snoops
);
670 /* Adds each of the snoops currently configured on 'mgr' to 'snoops'. */
672 connmgr_get_snoops(const struct connmgr
*mgr
, struct sset
*snoops
)
676 for (i
= 0; i
< mgr
->n_snoops
; i
++) {
677 sset_add(snoops
, pvconn_get_name(mgr
->snoops
[i
]));
681 /* Returns true if 'mgr' has at least one snoop, false if it has none. */
683 connmgr_has_snoops(const struct connmgr
*mgr
)
685 return mgr
->n_snoops
> 0;
688 /* Creates a new controller for 'target' in 'mgr'. update_controller() needs
689 * to be called later to finish the new ofconn's configuration. */
691 add_controller(struct connmgr
*mgr
, const char *target
, uint8_t dscp
,
692 uint32_t allowed_versions
)
693 OVS_REQUIRES(ofproto_mutex
)
695 char *name
= ofconn_make_name(mgr
, target
);
696 struct ofconn
*ofconn
;
698 ofconn
= ofconn_create(mgr
, rconn_create(5, 8, dscp
, allowed_versions
),
699 OFCONN_PRIMARY
, true);
700 ofconn
->pktbuf
= pktbuf_create();
701 rconn_connect(ofconn
->rconn
, target
, name
);
702 hmap_insert(&mgr
->controllers
, &ofconn
->hmap_node
, hash_string(target
, 0));
707 static struct ofconn
*
708 find_controller_by_target(struct connmgr
*mgr
, const char *target
)
710 struct ofconn
*ofconn
;
712 HMAP_FOR_EACH_WITH_HASH (ofconn
, hmap_node
,
713 hash_string(target
, 0), &mgr
->controllers
) {
714 if (!strcmp(ofconn_get_target(ofconn
), target
)) {
722 update_in_band_remotes(struct connmgr
*mgr
)
724 struct sockaddr_in
*addrs
;
725 size_t max_addrs
, n_addrs
;
726 struct ofconn
*ofconn
;
729 /* Allocate enough memory for as many remotes as we could possibly have. */
730 max_addrs
= mgr
->n_extra_remotes
+ hmap_count(&mgr
->controllers
);
731 addrs
= xmalloc(max_addrs
* sizeof *addrs
);
734 /* Add all the remotes. */
735 HMAP_FOR_EACH (ofconn
, hmap_node
, &mgr
->controllers
) {
736 const char *target
= rconn_get_target(ofconn
->rconn
);
738 struct sockaddr_storage ss
;
739 struct sockaddr_in in
;
742 if (ofconn
->band
== OFPROTO_IN_BAND
743 && stream_parse_target_with_default_port(target
, OFP_OLD_PORT
,
745 && sa
.ss
.ss_family
== AF_INET
) {
746 addrs
[n_addrs
++] = sa
.in
;
749 for (i
= 0; i
< mgr
->n_extra_remotes
; i
++) {
750 addrs
[n_addrs
++] = mgr
->extra_in_band_remotes
[i
];
753 /* Create or update or destroy in-band. */
756 in_band_create(mgr
->ofproto
, mgr
->local_port_name
, &mgr
->in_band
);
758 in_band_set_queue(mgr
->in_band
, mgr
->in_band_queue
);
760 /* in_band_run() needs a chance to delete any existing in-band flows.
761 * We will destroy mgr->in_band after it's done with that. */
764 in_band_set_remotes(mgr
->in_band
, addrs
, n_addrs
);
772 update_fail_open(struct connmgr
*mgr
)
773 OVS_EXCLUDED(ofproto_mutex
)
775 if (connmgr_has_controllers(mgr
)
776 && mgr
->fail_mode
== OFPROTO_FAIL_STANDALONE
) {
777 if (!mgr
->fail_open
) {
778 mgr
->fail_open
= fail_open_create(mgr
->ofproto
, mgr
);
781 fail_open_destroy(mgr
->fail_open
);
782 mgr
->fail_open
= NULL
;
787 set_pvconns(struct pvconn
***pvconnsp
, size_t *n_pvconnsp
,
788 const struct sset
*sset
)
790 struct pvconn
**pvconns
= *pvconnsp
;
791 size_t n_pvconns
= *n_pvconnsp
;
796 for (i
= 0; i
< n_pvconns
; i
++) {
797 pvconn_close(pvconns
[i
]);
801 pvconns
= xmalloc(sset_count(sset
) * sizeof *pvconns
);
803 SSET_FOR_EACH (name
, sset
) {
804 struct pvconn
*pvconn
;
806 error
= pvconn_open(name
, 0, 0, &pvconn
);
808 pvconns
[n_pvconns
++] = pvconn
;
810 VLOG_ERR("failed to listen on %s: %s", name
, ovs_strerror(error
));
818 *n_pvconnsp
= n_pvconns
;
823 /* Returns a "preference level" for snooping 'ofconn'. A higher return value
824 * means that 'ofconn' is more interesting for monitoring than a lower return
827 snoop_preference(const struct ofconn
*ofconn
)
829 switch (ofconn
->role
) {
830 case OFPCR12_ROLE_MASTER
:
832 case OFPCR12_ROLE_EQUAL
:
834 case OFPCR12_ROLE_SLAVE
:
836 case OFPCR12_ROLE_NOCHANGE
:
838 /* Shouldn't happen. */
843 /* One of 'mgr''s "snoop" pvconns has accepted a new connection on 'vconn'.
844 * Connects this vconn to a controller. */
846 add_snooper(struct connmgr
*mgr
, struct vconn
*vconn
)
848 struct ofconn
*ofconn
, *best
;
850 /* Pick a controller for monitoring. */
852 LIST_FOR_EACH (ofconn
, node
, &mgr
->all_conns
) {
853 if (ofconn
->type
== OFCONN_PRIMARY
854 && (!best
|| snoop_preference(ofconn
) > snoop_preference(best
))) {
860 rconn_add_monitor(best
->rconn
, vconn
);
862 VLOG_INFO_RL(&rl
, "no controller connection to snoop");
867 /* Public ofconn functions. */
869 /* Returns the connection type, either OFCONN_PRIMARY or OFCONN_SERVICE. */
871 ofconn_get_type(const struct ofconn
*ofconn
)
876 /* If a master election id is defined, stores it into '*idp' and returns
877 * true. Otherwise, stores UINT64_MAX into '*idp' and returns false. */
879 ofconn_get_master_election_id(const struct ofconn
*ofconn
, uint64_t *idp
)
881 *idp
= (ofconn
->connmgr
->master_election_id_defined
882 ? ofconn
->connmgr
->master_election_id
884 return ofconn
->connmgr
->master_election_id_defined
;
887 /* Sets the master election id.
889 * Returns true if successful, false if the id is stale
892 ofconn_set_master_election_id(struct ofconn
*ofconn
, uint64_t id
)
894 if (ofconn
->connmgr
->master_election_id_defined
896 /* Unsigned difference interpreted as a two's complement signed
898 (int64_t)(id
- ofconn
->connmgr
->master_election_id
) < 0) {
901 ofconn
->connmgr
->master_election_id
= id
;
902 ofconn
->connmgr
->master_election_id_defined
= true;
907 /* Returns the role configured for 'ofconn'.
909 * The default role, if no other role has been set, is OFPCR12_ROLE_EQUAL. */
910 enum ofp12_controller_role
911 ofconn_get_role(const struct ofconn
*ofconn
)
917 ofconn_send_role_status(struct ofconn
*ofconn
, uint32_t role
, uint8_t reason
)
919 struct ofputil_role_status status
;
922 status
.reason
= reason
;
924 ofconn_get_master_election_id(ofconn
, &status
.generation_id
);
926 buf
= ofputil_encode_role_status(&status
, ofconn_get_protocol(ofconn
));
928 ofconn_send(ofconn
, buf
, NULL
);
932 /* Changes 'ofconn''s role to 'role'. If 'role' is OFPCR12_ROLE_MASTER then
933 * any existing master is demoted to a slave. */
935 ofconn_set_role(struct ofconn
*ofconn
, enum ofp12_controller_role role
)
937 if (role
!= ofconn
->role
&& role
== OFPCR12_ROLE_MASTER
) {
938 struct ofconn
*other
;
940 LIST_FOR_EACH (other
, node
, &ofconn
->connmgr
->all_conns
) {
941 if (other
->role
== OFPCR12_ROLE_MASTER
) {
942 other
->role
= OFPCR12_ROLE_SLAVE
;
943 ofconn_send_role_status(other
, OFPCR12_ROLE_SLAVE
, OFPCRR_MASTER_REQUEST
);
951 ofconn_set_invalid_ttl_to_controller(struct ofconn
*ofconn
, bool enable
)
953 uint32_t bit
= 1u << OFPR_INVALID_TTL
;
955 ofconn
->master_async_config
[OAM_PACKET_IN
] |= bit
;
957 ofconn
->master_async_config
[OAM_PACKET_IN
] &= ~bit
;
962 ofconn_get_invalid_ttl_to_controller(struct ofconn
*ofconn
)
964 uint32_t bit
= 1u << OFPR_INVALID_TTL
;
965 return (ofconn
->master_async_config
[OAM_PACKET_IN
] & bit
) != 0;
968 /* Returns the currently configured protocol for 'ofconn', one of OFPUTIL_P_*.
970 * Returns OFPUTIL_P_NONE, which is not a valid protocol, if 'ofconn' hasn't
971 * completed version negotiation. This can't happen if at least one OpenFlow
972 * message, other than OFPT_HELLO, has been received on the connection (such as
973 * in ofproto.c's message handling code), since version negotiation is a
974 * prerequisite for starting to receive messages. This means that
975 * OFPUTIL_P_NONE is a special case that most callers need not worry about. */
976 enum ofputil_protocol
977 ofconn_get_protocol(const struct ofconn
*ofconn
)
979 if (ofconn
->protocol
== OFPUTIL_P_NONE
&&
980 rconn_is_connected(ofconn
->rconn
)) {
981 int version
= rconn_get_version(ofconn
->rconn
);
983 ofconn_set_protocol(CONST_CAST(struct ofconn
*, ofconn
),
984 ofputil_protocol_from_ofp_version(version
));
988 return ofconn
->protocol
;
991 /* Sets the protocol for 'ofconn' to 'protocol' (one of OFPUTIL_P_*).
993 * (This doesn't actually send anything to accomplish this. Presumably the
994 * caller already did that.) */
996 ofconn_set_protocol(struct ofconn
*ofconn
, enum ofputil_protocol protocol
)
998 ofconn
->protocol
= protocol
;
999 if (!(protocol
& OFPUTIL_P_OF14_UP
)) {
1000 uint32_t *master
= ofconn
->master_async_config
;
1001 uint32_t *slave
= ofconn
->slave_async_config
;
1003 /* OFPR_GROUP is not supported before OF1.4 */
1004 master
[OAM_PACKET_IN
] &= ~(1u << OFPR_GROUP
);
1005 slave
[OAM_PACKET_IN
] &= ~(1u << OFPR_GROUP
);
1009 /* Returns the currently configured packet in format for 'ofconn', one of
1012 * The default, if no other format has been set, is NXPIF_OPENFLOW10. */
1013 enum nx_packet_in_format
1014 ofconn_get_packet_in_format(struct ofconn
*ofconn
)
1016 return ofconn
->packet_in_format
;
1019 /* Sets the packet in format for 'ofconn' to 'packet_in_format' (one of
1022 ofconn_set_packet_in_format(struct ofconn
*ofconn
,
1023 enum nx_packet_in_format packet_in_format
)
1025 ofconn
->packet_in_format
= packet_in_format
;
1028 /* Sets the controller connection ID for 'ofconn' to 'controller_id'.
1030 * The connection controller ID is used for OFPP_CONTROLLER and
1031 * NXAST_CONTROLLER actions. See "struct nx_action_controller" for details. */
1033 ofconn_set_controller_id(struct ofconn
*ofconn
, uint16_t controller_id
)
1035 ofconn
->controller_id
= controller_id
;
1038 /* Returns the default miss send length for 'ofconn'. */
1040 ofconn_get_miss_send_len(const struct ofconn
*ofconn
)
1042 return ofconn
->miss_send_len
;
1045 /* Sets the default miss send length for 'ofconn' to 'miss_send_len'. */
1047 ofconn_set_miss_send_len(struct ofconn
*ofconn
, int miss_send_len
)
1049 ofconn
->miss_send_len
= miss_send_len
;
1053 ofconn_set_async_config(struct ofconn
*ofconn
,
1054 const uint32_t master_masks
[OAM_N_TYPES
],
1055 const uint32_t slave_masks
[OAM_N_TYPES
])
1057 size_t size
= sizeof ofconn
->master_async_config
;
1058 memcpy(ofconn
->master_async_config
, master_masks
, size
);
1059 memcpy(ofconn
->slave_async_config
, slave_masks
, size
);
1063 ofconn_get_async_config(struct ofconn
*ofconn
,
1064 uint32_t *master_masks
, uint32_t *slave_masks
)
1066 size_t size
= sizeof ofconn
->master_async_config
;
1068 /* Make sure we know the protocol version and the async_config
1069 * masks are properly updated by calling ofconn_get_protocol() */
1070 if (OFPUTIL_P_NONE
== ofconn_get_protocol(ofconn
)){
1074 memcpy(master_masks
, ofconn
->master_async_config
, size
);
1075 memcpy(slave_masks
, ofconn
->slave_async_config
, size
);
1078 /* Sends 'msg' on 'ofconn', accounting it as a reply. (If there is a
1079 * sufficient number of OpenFlow replies in-flight on a single ofconn, then the
1080 * connmgr will stop accepting new OpenFlow requests on that ofconn until the
1081 * controller has accepted some of the replies.) */
1083 ofconn_send_reply(const struct ofconn
*ofconn
, struct ofpbuf
*msg
)
1085 ofconn_send(ofconn
, msg
, ofconn
->reply_counter
);
1088 /* Sends each of the messages in list 'replies' on 'ofconn' in order,
1089 * accounting them as replies. */
1091 ofconn_send_replies(const struct ofconn
*ofconn
, struct list
*replies
)
1093 struct ofpbuf
*reply
, *next
;
1095 LIST_FOR_EACH_SAFE (reply
, next
, list_node
, replies
) {
1096 list_remove(&reply
->list_node
);
1097 ofconn_send_reply(ofconn
, reply
);
1101 /* Sends 'error' on 'ofconn', as a reply to 'request'. Only at most the
1102 * first 64 bytes of 'request' are used. */
1104 ofconn_send_error(const struct ofconn
*ofconn
,
1105 const struct ofp_header
*request
, enum ofperr error
)
1107 static struct vlog_rate_limit err_rl
= VLOG_RATE_LIMIT_INIT(10, 10);
1108 struct ofpbuf
*reply
;
1110 reply
= ofperr_encode_reply(error
, request
);
1111 if (!VLOG_DROP_INFO(&err_rl
)) {
1112 const char *type_name
;
1116 request_len
= ntohs(request
->length
);
1117 type_name
= (!ofpraw_decode_partial(&raw
, request
,
1118 MIN(64, request_len
))
1119 ? ofpraw_get_name(raw
)
1122 VLOG_INFO("%s: sending %s error reply to %s message",
1123 rconn_get_name(ofconn
->rconn
), ofperr_to_string(error
),
1126 ofconn_send_reply(ofconn
, reply
);
1129 /* Same as pktbuf_retrieve(), using the pktbuf owned by 'ofconn'. */
1131 ofconn_pktbuf_retrieve(struct ofconn
*ofconn
, uint32_t id
,
1132 struct ofpbuf
**bufferp
, ofp_port_t
*in_port
)
1134 return pktbuf_retrieve(ofconn
->pktbuf
, id
, bufferp
, in_port
);
1137 /* Reports that a flow_mod operation of the type specified by 'command' was
1138 * successfully executed by 'ofconn', so that the connmgr can log it. */
1140 ofconn_report_flow_mod(struct ofconn
*ofconn
,
1141 enum ofp_flow_mod_command command
)
1151 case OFPFC_MODIFY_STRICT
:
1156 case OFPFC_DELETE_STRICT
:
1162 if (ofconn
->next_op_report
== LLONG_MAX
) {
1163 ofconn
->first_op
= now
;
1164 ofconn
->next_op_report
= MAX(now
+ 10 * 1000, ofconn
->op_backoff
);
1165 ofconn
->op_backoff
= ofconn
->next_op_report
+ 60 * 1000;
1167 ofconn
->last_op
= now
;
1171 ofconn_get_bundles(struct ofconn
*ofconn
)
1173 return &ofconn
->bundles
;
1177 /* Private ofconn functions. */
1180 ofconn_get_target(const struct ofconn
*ofconn
)
1182 return rconn_get_target(ofconn
->rconn
);
1185 static struct ofconn
*
1186 ofconn_create(struct connmgr
*mgr
, struct rconn
*rconn
, enum ofconn_type type
,
1187 bool enable_async_msgs
)
1189 struct ofconn
*ofconn
;
1191 ofconn
= xzalloc(sizeof *ofconn
);
1192 ofconn
->connmgr
= mgr
;
1193 list_push_back(&mgr
->all_conns
, &ofconn
->node
);
1194 ofconn
->rconn
= rconn
;
1195 ofconn
->type
= type
;
1196 ofconn
->enable_async_msgs
= enable_async_msgs
;
1198 hmap_init(&ofconn
->monitors
);
1199 list_init(&ofconn
->updates
);
1201 hmap_init(&ofconn
->bundles
);
1203 ofconn_flush(ofconn
);
1208 /* Clears all of the state in 'ofconn' that should not persist from one
1209 * connection to the next. */
1211 ofconn_flush(struct ofconn
*ofconn
)
1212 OVS_REQUIRES(ofproto_mutex
)
1214 struct ofmonitor
*monitor
, *next_monitor
;
1217 ofconn_log_flow_mods(ofconn
);
1219 ofconn
->role
= OFPCR12_ROLE_EQUAL
;
1220 ofconn_set_protocol(ofconn
, OFPUTIL_P_NONE
);
1221 ofconn
->packet_in_format
= NXPIF_OPENFLOW10
;
1223 rconn_packet_counter_destroy(ofconn
->packet_in_counter
);
1224 ofconn
->packet_in_counter
= rconn_packet_counter_create();
1225 for (i
= 0; i
< N_SCHEDULERS
; i
++) {
1226 if (ofconn
->schedulers
[i
]) {
1229 pinsched_get_limits(ofconn
->schedulers
[i
], &rate
, &burst
);
1230 pinsched_destroy(ofconn
->schedulers
[i
]);
1231 ofconn
->schedulers
[i
] = pinsched_create(rate
, burst
);
1234 if (ofconn
->pktbuf
) {
1235 pktbuf_destroy(ofconn
->pktbuf
);
1236 ofconn
->pktbuf
= pktbuf_create();
1238 ofconn
->miss_send_len
= (ofconn
->type
== OFCONN_PRIMARY
1239 ? OFP_DEFAULT_MISS_SEND_LEN
1241 ofconn
->controller_id
= 0;
1243 rconn_packet_counter_destroy(ofconn
->reply_counter
);
1244 ofconn
->reply_counter
= rconn_packet_counter_create();
1246 if (ofconn
->enable_async_msgs
) {
1247 uint32_t *master
= ofconn
->master_async_config
;
1248 uint32_t *slave
= ofconn
->slave_async_config
;
1250 /* "master" and "other" roles get all asynchronous messages by default,
1251 * except that the controller needs to enable nonstandard "packet-in"
1252 * reasons itself. */
1253 master
[OAM_PACKET_IN
] = ((1u << OFPR_NO_MATCH
)
1254 | (1u << OFPR_ACTION
)
1255 | (1u << OFPR_GROUP
));
1256 master
[OAM_PORT_STATUS
] = ((1u << OFPPR_ADD
)
1257 | (1u << OFPPR_DELETE
)
1258 | (1u << OFPPR_MODIFY
));
1259 master
[OAM_FLOW_REMOVED
] = ((1u << OFPRR_IDLE_TIMEOUT
)
1260 | (1u << OFPRR_HARD_TIMEOUT
)
1261 | (1u << OFPRR_DELETE
));
1263 /* "slave" role gets port status updates by default. */
1264 slave
[OAM_PACKET_IN
] = 0;
1265 slave
[OAM_PORT_STATUS
] = ((1u << OFPPR_ADD
)
1266 | (1u << OFPPR_DELETE
)
1267 | (1u << OFPPR_MODIFY
));
1268 slave
[OAM_FLOW_REMOVED
] = 0;
1270 memset(ofconn
->master_async_config
, 0,
1271 sizeof ofconn
->master_async_config
);
1272 memset(ofconn
->slave_async_config
, 0,
1273 sizeof ofconn
->slave_async_config
);
1276 ofconn
->n_add
= ofconn
->n_delete
= ofconn
->n_modify
= 0;
1277 ofconn
->first_op
= ofconn
->last_op
= LLONG_MIN
;
1278 ofconn
->next_op_report
= LLONG_MAX
;
1279 ofconn
->op_backoff
= LLONG_MIN
;
1281 HMAP_FOR_EACH_SAFE (monitor
, next_monitor
, ofconn_node
,
1282 &ofconn
->monitors
) {
1283 ofmonitor_destroy(monitor
);
1285 rconn_packet_counter_destroy(ofconn
->monitor_counter
);
1286 ofconn
->monitor_counter
= rconn_packet_counter_create();
1287 ofpbuf_list_delete(&ofconn
->updates
); /* ...but it should be empty. */
1291 ofconn_destroy(struct ofconn
*ofconn
)
1292 OVS_REQUIRES(ofproto_mutex
)
1294 ofconn_flush(ofconn
);
1296 if (ofconn
->type
== OFCONN_PRIMARY
) {
1297 hmap_remove(&ofconn
->connmgr
->controllers
, &ofconn
->hmap_node
);
1300 ofp_bundle_remove_all(ofconn
);
1302 hmap_destroy(&ofconn
->monitors
);
1303 list_remove(&ofconn
->node
);
1304 rconn_destroy(ofconn
->rconn
);
1305 rconn_packet_counter_destroy(ofconn
->packet_in_counter
);
1306 rconn_packet_counter_destroy(ofconn
->reply_counter
);
1307 pktbuf_destroy(ofconn
->pktbuf
);
1308 rconn_packet_counter_destroy(ofconn
->monitor_counter
);
1312 /* Reconfigures 'ofconn' to match 'c'. 'ofconn' and 'c' must have the same
1315 ofconn_reconfigure(struct ofconn
*ofconn
, const struct ofproto_controller
*c
)
1319 ofconn
->band
= c
->band
;
1320 ofconn
->enable_async_msgs
= c
->enable_async_msgs
;
1322 rconn_set_max_backoff(ofconn
->rconn
, c
->max_backoff
);
1324 probe_interval
= c
->probe_interval
? MAX(c
->probe_interval
, 5) : 0;
1325 rconn_set_probe_interval(ofconn
->rconn
, probe_interval
);
1327 ofconn_set_rate_limit(ofconn
, c
->rate_limit
, c
->burst_limit
);
1329 /* If dscp value changed reconnect. */
1330 if (c
->dscp
!= rconn_get_dscp(ofconn
->rconn
)) {
1331 rconn_set_dscp(ofconn
->rconn
, c
->dscp
);
1332 rconn_reconnect(ofconn
->rconn
);
1336 /* Returns true if it makes sense for 'ofconn' to receive and process OpenFlow
1339 ofconn_may_recv(const struct ofconn
*ofconn
)
1341 int count
= rconn_packet_counter_n_packets(ofconn
->reply_counter
);
1342 return count
< OFCONN_REPLY_MAX
;
1346 ofconn_run(struct ofconn
*ofconn
,
1347 void (*handle_openflow
)(struct ofconn
*,
1348 const struct ofpbuf
*ofp_msg
))
1350 struct connmgr
*mgr
= ofconn
->connmgr
;
1353 for (i
= 0; i
< N_SCHEDULERS
; i
++) {
1356 pinsched_run(ofconn
->schedulers
[i
], &txq
);
1357 do_send_packet_ins(ofconn
, &txq
);
1360 rconn_run(ofconn
->rconn
);
1362 /* Limit the number of iterations to avoid starving other tasks. */
1363 for (i
= 0; i
< 50 && ofconn_may_recv(ofconn
); i
++) {
1364 struct ofpbuf
*of_msg
= rconn_recv(ofconn
->rconn
);
1369 if (mgr
->fail_open
) {
1370 fail_open_maybe_recover(mgr
->fail_open
);
1373 handle_openflow(ofconn
, of_msg
);
1374 ofpbuf_delete(of_msg
);
1377 if (time_msec() >= ofconn
->next_op_report
) {
1378 ofconn_log_flow_mods(ofconn
);
1381 ovs_mutex_lock(&ofproto_mutex
);
1382 if (!rconn_is_alive(ofconn
->rconn
)) {
1383 ofconn_destroy(ofconn
);
1384 } else if (!rconn_is_connected(ofconn
->rconn
)) {
1385 ofconn_flush(ofconn
);
1387 ovs_mutex_unlock(&ofproto_mutex
);
1391 ofconn_wait(struct ofconn
*ofconn
)
1395 for (i
= 0; i
< N_SCHEDULERS
; i
++) {
1396 pinsched_wait(ofconn
->schedulers
[i
]);
1398 rconn_run_wait(ofconn
->rconn
);
1399 if (ofconn_may_recv(ofconn
)) {
1400 rconn_recv_wait(ofconn
->rconn
);
1402 if (ofconn
->next_op_report
!= LLONG_MAX
) {
1403 poll_timer_wait_until(ofconn
->next_op_report
);
1408 ofconn_log_flow_mods(struct ofconn
*ofconn
)
1410 int n_flow_mods
= ofconn
->n_add
+ ofconn
->n_delete
+ ofconn
->n_modify
;
1412 long long int ago
= (time_msec() - ofconn
->first_op
) / 1000;
1413 long long int interval
= (ofconn
->last_op
- ofconn
->first_op
) / 1000;
1417 ds_put_format(&s
, "%d flow_mods ", n_flow_mods
);
1418 if (interval
== ago
) {
1419 ds_put_format(&s
, "in the last %lld s", ago
);
1420 } else if (interval
) {
1421 ds_put_format(&s
, "in the %lld s starting %lld s ago",
1424 ds_put_format(&s
, "%lld s ago", ago
);
1427 ds_put_cstr(&s
, " (");
1428 if (ofconn
->n_add
) {
1429 ds_put_format(&s
, "%d adds, ", ofconn
->n_add
);
1431 if (ofconn
->n_delete
) {
1432 ds_put_format(&s
, "%d deletes, ", ofconn
->n_delete
);
1434 if (ofconn
->n_modify
) {
1435 ds_put_format(&s
, "%d modifications, ", ofconn
->n_modify
);
1438 ds_put_char(&s
, ')');
1440 VLOG_INFO("%s: %s", rconn_get_name(ofconn
->rconn
), ds_cstr(&s
));
1443 ofconn
->n_add
= ofconn
->n_delete
= ofconn
->n_modify
= 0;
1445 ofconn
->next_op_report
= LLONG_MAX
;
1448 /* Returns true if 'ofconn' should receive asynchronous messages of the given
1449 * OAM_* 'type' and 'reason', which should be a OFPR_* value for OAM_PACKET_IN,
1450 * a OFPPR_* value for OAM_PORT_STATUS, or an OFPRR_* value for
1451 * OAM_FLOW_REMOVED. Returns false if the message should not be sent on
1454 ofconn_receives_async_msg(const struct ofconn
*ofconn
,
1455 enum ofconn_async_msg_type type
,
1456 unsigned int reason
)
1458 const uint32_t *async_config
;
1460 ovs_assert(reason
< 32);
1461 ovs_assert((unsigned int) type
< OAM_N_TYPES
);
1463 if (ofconn_get_protocol(ofconn
) == OFPUTIL_P_NONE
1464 || !rconn_is_connected(ofconn
->rconn
)) {
1468 /* Keep the following code in sync with the documentation in the
1469 * "Asynchronous Messages" section in DESIGN. */
1471 if (ofconn
->type
== OFCONN_SERVICE
&& !ofconn
->miss_send_len
) {
1472 /* Service connections don't get asynchronous messages unless they have
1473 * explicitly asked for them by setting a nonzero miss send length. */
1477 async_config
= (ofconn
->role
== OFPCR12_ROLE_SLAVE
1478 ? ofconn
->slave_async_config
1479 : ofconn
->master_async_config
);
1480 if (!(async_config
[type
] & (1u << reason
))) {
1487 /* The default "table-miss" behaviour for OpenFlow1.3+ is to drop the
1488 * packet rather than to send the packet to the controller.
1490 * This function returns false to indicate the packet should be dropped if
1491 * the controller action was the result of the default table-miss behaviour
1492 * and the controller is using OpenFlow1.3+.
1494 * Otherwise true is returned to indicate the packet should be forwarded to
1497 ofconn_wants_packet_in_on_miss(struct ofconn
*ofconn
,
1498 const struct ofproto_packet_in
*pin
)
1500 if (pin
->miss_type
== OFPROTO_PACKET_IN_MISS_WITHOUT_FLOW
) {
1501 enum ofputil_protocol protocol
= ofconn_get_protocol(ofconn
);
1503 if (protocol
!= OFPUTIL_P_NONE
1504 && ofputil_protocol_to_ofp_version(protocol
) >= OFP13_VERSION
1505 && (ofproto_table_get_miss_config(ofconn
->connmgr
->ofproto
,
1507 == OFPUTIL_TABLE_MISS_DEFAULT
)) {
1514 /* The default "table-miss" behaviour for OpenFlow1.3+ is to drop the
1515 * packet rather than to send the packet to the controller.
1517 * This function returns true to indicate that a packet_in message
1518 * for a "table-miss" should be sent to at least one controller.
1519 * That is there is at least one controller with controller_id 0
1520 * which connected using an OpenFlow version earlier than OpenFlow1.3.
1524 * This logic assumes that "table-miss" packet_in messages
1525 * are always sent to controller_id 0. */
1527 connmgr_wants_packet_in_on_miss(struct connmgr
*mgr
) OVS_EXCLUDED(ofproto_mutex
)
1529 struct ofconn
*ofconn
;
1531 ovs_mutex_lock(&ofproto_mutex
);
1532 LIST_FOR_EACH (ofconn
, node
, &mgr
->all_conns
) {
1533 enum ofputil_protocol protocol
= ofconn_get_protocol(ofconn
);
1535 if (ofconn
->controller_id
== 0 &&
1536 (protocol
== OFPUTIL_P_NONE
||
1537 ofputil_protocol_to_ofp_version(protocol
) < OFP13_VERSION
)) {
1538 ovs_mutex_unlock(&ofproto_mutex
);
1542 ovs_mutex_unlock(&ofproto_mutex
);
1547 /* Returns a human-readable name for an OpenFlow connection between 'mgr' and
1548 * 'target', suitable for use in log messages for identifying the connection.
1550 * The name is dynamically allocated. The caller should free it (with free())
1551 * when it is no longer needed. */
1553 ofconn_make_name(const struct connmgr
*mgr
, const char *target
)
1555 return xasprintf("%s<->%s", mgr
->name
, target
);
1559 ofconn_set_rate_limit(struct ofconn
*ofconn
, int rate
, int burst
)
1563 for (i
= 0; i
< N_SCHEDULERS
; i
++) {
1564 struct pinsched
**s
= &ofconn
->schedulers
[i
];
1568 *s
= pinsched_create(rate
, burst
);
1570 pinsched_set_limits(*s
, rate
, burst
);
1573 pinsched_destroy(*s
);
1580 ofconn_send(const struct ofconn
*ofconn
, struct ofpbuf
*msg
,
1581 struct rconn_packet_counter
*counter
)
1583 ofpmsg_update_length(msg
);
1584 rconn_send(ofconn
->rconn
, msg
, counter
);
1587 /* Sending asynchronous messages. */
1589 static void schedule_packet_in(struct ofconn
*, struct ofproto_packet_in
,
1590 enum ofp_packet_in_reason wire_reason
);
1592 /* Sends an OFPT_PORT_STATUS message with 'opp' and 'reason' to appropriate
1593 * controllers managed by 'mgr'. For messages caused by a controller
1594 * OFPT_PORT_MOD, specify 'source' as the controller connection that sent the
1595 * request; otherwise, specify 'source' as NULL. */
1597 connmgr_send_port_status(struct connmgr
*mgr
, struct ofconn
*source
,
1598 const struct ofputil_phy_port
*pp
, uint8_t reason
)
1600 /* XXX Should limit the number of queued port status change messages. */
1601 struct ofputil_port_status ps
;
1602 struct ofconn
*ofconn
;
1606 LIST_FOR_EACH (ofconn
, node
, &mgr
->all_conns
) {
1607 if (ofconn_receives_async_msg(ofconn
, OAM_PORT_STATUS
, reason
)) {
1610 /* Before 1.5, OpenFlow specified that OFPT_PORT_MOD should not
1611 * generate OFPT_PORT_STATUS messages. That requirement was a
1612 * relic of how OpenFlow originally supported a single controller,
1613 * so that one could expect the controller to already know the
1614 * changes it had made.
1616 * EXT-338 changes OpenFlow 1.5 OFPT_PORT_MOD to send
1617 * OFPT_PORT_STATUS messages to every controller. This is
1618 * obviously more useful in the multi-controller case. We could
1619 * always implement it that way in OVS, but that would risk
1620 * confusing controllers that are intended for single-controller
1621 * use only. (Imagine a controller that generates an OFPT_PORT_MOD
1622 * in response to any OFPT_PORT_STATUS!)
1624 * So this compromises: for OpenFlow 1.4 and earlier, it generates
1625 * OFPT_PORT_STATUS for OFPT_PORT_MOD, but not back to the
1626 * originating controller. In a single-controller environment, in
1627 * particular, this means that it will never generate
1628 * OFPT_PORT_STATUS for OFPT_PORT_MOD at all. */
1629 if (ofconn
== source
1630 && rconn_get_version(ofconn
->rconn
) < OFP15_VERSION
) {
1634 msg
= ofputil_encode_port_status(&ps
, ofconn_get_protocol(ofconn
));
1635 ofconn_send(ofconn
, msg
, NULL
);
1640 /* Sends an OFPT_FLOW_REMOVED or NXT_FLOW_REMOVED message based on 'fr' to
1641 * appropriate controllers managed by 'mgr'. */
1643 connmgr_send_flow_removed(struct connmgr
*mgr
,
1644 const struct ofputil_flow_removed
*fr
)
1646 struct ofconn
*ofconn
;
1648 LIST_FOR_EACH (ofconn
, node
, &mgr
->all_conns
) {
1649 if (ofconn_receives_async_msg(ofconn
, OAM_FLOW_REMOVED
, fr
->reason
)) {
1652 /* Account flow expirations as replies to OpenFlow requests. That
1653 * works because preventing OpenFlow requests from being processed
1654 * also prevents new flows from being added (and expiring). (It
1655 * also prevents processing OpenFlow requests that would not add
1656 * new flows, so it is imperfect.) */
1657 msg
= ofputil_encode_flow_removed(fr
, ofconn_get_protocol(ofconn
));
1658 ofconn_send_reply(ofconn
, msg
);
1663 /* Normally a send-to-controller action uses reason OFPR_ACTION. However, in
1664 * OpenFlow 1.3 and later, packet_ins generated by a send-to-controller action
1665 * in a "table-miss" flow (one with priority 0 and completely wildcarded) are
1666 * sent as OFPR_NO_MATCH. This function returns the reason that should
1667 * actually be sent on 'ofconn' for 'pin'. */
1668 static enum ofp_packet_in_reason
1669 wire_reason(struct ofconn
*ofconn
, const struct ofproto_packet_in
*pin
)
1671 enum ofputil_protocol protocol
= ofconn_get_protocol(ofconn
);
1673 if (pin
->miss_type
== OFPROTO_PACKET_IN_MISS_FLOW
1674 && pin
->up
.reason
== OFPR_ACTION
1675 && protocol
!= OFPUTIL_P_NONE
1676 && ofputil_protocol_to_ofp_version(protocol
) >= OFP13_VERSION
) {
1677 return OFPR_NO_MATCH
;
1680 switch (pin
->up
.reason
) {
1681 case OFPR_ACTION_SET
:
1683 case OFPR_PACKET_OUT
:
1684 if (!(protocol
& OFPUTIL_P_OF14_UP
)) {
1685 /* Only supported in OF1.4+ */
1691 case OFPR_INVALID_TTL
:
1692 case OFPR_N_REASONS
:
1694 return pin
->up
.reason
;
1698 /* Given 'pin', sends an OFPT_PACKET_IN message to each OpenFlow controller as
1699 * necessary according to their individual configurations.
1701 * The caller doesn't need to fill in pin->buffer_id or pin->total_len. */
1703 connmgr_send_packet_in(struct connmgr
*mgr
,
1704 const struct ofproto_packet_in
*pin
)
1706 struct ofconn
*ofconn
;
1708 LIST_FOR_EACH (ofconn
, node
, &mgr
->all_conns
) {
1709 enum ofp_packet_in_reason reason
= wire_reason(ofconn
, pin
);
1711 if (ofconn_wants_packet_in_on_miss(ofconn
, pin
)
1712 && ofconn_receives_async_msg(ofconn
, OAM_PACKET_IN
, reason
)
1713 && ofconn
->controller_id
== pin
->controller_id
) {
1714 schedule_packet_in(ofconn
, *pin
, reason
);
1720 do_send_packet_ins(struct ofconn
*ofconn
, struct list
*txq
)
1722 struct ofpbuf
*pin
, *next_pin
;
1724 LIST_FOR_EACH_SAFE (pin
, next_pin
, list_node
, txq
) {
1725 list_remove(&pin
->list_node
);
1727 if (rconn_send_with_limit(ofconn
->rconn
, pin
,
1728 ofconn
->packet_in_counter
, 100) == EAGAIN
) {
1729 static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(5, 5);
1731 VLOG_INFO_RL(&rl
, "%s: dropping packet-in due to queue overflow",
1732 rconn_get_name(ofconn
->rconn
));
1737 /* Takes 'pin', composes an OpenFlow packet-in message from it, and passes it
1738 * to 'ofconn''s packet scheduler for sending. */
1740 schedule_packet_in(struct ofconn
*ofconn
, struct ofproto_packet_in pin
,
1741 enum ofp_packet_in_reason wire_reason
)
1743 struct connmgr
*mgr
= ofconn
->connmgr
;
1744 uint16_t controller_max_len
;
1747 pin
.up
.total_len
= pin
.up
.packet_len
;
1749 pin
.up
.reason
= wire_reason
;
1750 if (pin
.up
.reason
== OFPR_ACTION
) {
1751 controller_max_len
= pin
.send_len
; /* max_len */
1753 controller_max_len
= ofconn
->miss_send_len
;
1756 /* Get OpenFlow buffer_id.
1757 * For OpenFlow 1.2+, OFPCML_NO_BUFFER (== UINT16_MAX) specifies
1758 * unbuffered. This behaviour doesn't violate prior versions, too. */
1759 if (controller_max_len
== UINT16_MAX
) {
1760 pin
.up
.buffer_id
= UINT32_MAX
;
1761 } else if (mgr
->fail_open
&& fail_open_is_active(mgr
->fail_open
)) {
1762 pin
.up
.buffer_id
= pktbuf_get_null();
1763 } else if (!ofconn
->pktbuf
) {
1764 pin
.up
.buffer_id
= UINT32_MAX
;
1766 pin
.up
.buffer_id
= pktbuf_save(ofconn
->pktbuf
,
1767 pin
.up
.packet
, pin
.up
.packet_len
,
1768 pin
.up
.fmd
.in_port
);
1771 /* Figure out how much of the packet to send.
1772 * If not buffered, send the entire packet. Otherwise, depending on
1773 * the reason of packet-in, send what requested by the controller. */
1774 if (pin
.up
.buffer_id
!= UINT32_MAX
1775 && controller_max_len
< pin
.up
.packet_len
) {
1776 pin
.up
.packet_len
= controller_max_len
;
1779 /* Make OFPT_PACKET_IN and hand over to packet scheduler. */
1780 pinsched_send(ofconn
->schedulers
[pin
.up
.reason
== OFPR_NO_MATCH
? 0 : 1],
1782 ofputil_encode_packet_in(&pin
.up
,
1783 ofconn_get_protocol(ofconn
),
1784 ofconn
->packet_in_format
),
1786 do_send_packet_ins(ofconn
, &txq
);
1789 /* Fail-open settings. */
1791 /* Returns the failure handling mode (OFPROTO_FAIL_SECURE or
1792 * OFPROTO_FAIL_STANDALONE) for 'mgr'. */
1793 enum ofproto_fail_mode
1794 connmgr_get_fail_mode(const struct connmgr
*mgr
)
1796 return mgr
->fail_mode
;
1799 /* Sets the failure handling mode for 'mgr' to 'fail_mode' (either
1800 * OFPROTO_FAIL_SECURE or OFPROTO_FAIL_STANDALONE). */
1802 connmgr_set_fail_mode(struct connmgr
*mgr
, enum ofproto_fail_mode fail_mode
)
1804 if (mgr
->fail_mode
!= fail_mode
) {
1805 mgr
->fail_mode
= fail_mode
;
1806 update_fail_open(mgr
);
1807 if (!connmgr_has_controllers(mgr
)) {
1808 ofproto_flush_flows(mgr
->ofproto
);
1813 /* Fail-open implementation. */
1815 /* Returns the longest probe interval among the primary controllers configured
1816 * on 'mgr'. Returns 0 if there are no primary controllers. */
1818 connmgr_get_max_probe_interval(const struct connmgr
*mgr
)
1820 const struct ofconn
*ofconn
;
1821 int max_probe_interval
;
1823 max_probe_interval
= 0;
1824 HMAP_FOR_EACH (ofconn
, hmap_node
, &mgr
->controllers
) {
1825 int probe_interval
= rconn_get_probe_interval(ofconn
->rconn
);
1826 max_probe_interval
= MAX(max_probe_interval
, probe_interval
);
1828 return max_probe_interval
;
1831 /* Returns the number of seconds for which all of 'mgr's primary controllers
1832 * have been disconnected. Returns 0 if 'mgr' has no primary controllers. */
1834 connmgr_failure_duration(const struct connmgr
*mgr
)
1836 const struct ofconn
*ofconn
;
1837 int min_failure_duration
;
1839 if (!connmgr_has_controllers(mgr
)) {
1843 min_failure_duration
= INT_MAX
;
1844 HMAP_FOR_EACH (ofconn
, hmap_node
, &mgr
->controllers
) {
1845 int failure_duration
= rconn_failure_duration(ofconn
->rconn
);
1846 min_failure_duration
= MIN(min_failure_duration
, failure_duration
);
1848 return min_failure_duration
;
1851 /* Returns true if at least one primary controller is connected (regardless of
1852 * whether those controllers are believed to have authenticated and accepted
1853 * this switch), false if none of them are connected. */
1855 connmgr_is_any_controller_connected(const struct connmgr
*mgr
)
1857 const struct ofconn
*ofconn
;
1859 HMAP_FOR_EACH (ofconn
, hmap_node
, &mgr
->controllers
) {
1860 if (rconn_is_connected(ofconn
->rconn
)) {
1867 /* Returns true if at least one primary controller is believed to have
1868 * authenticated and accepted this switch, false otherwise. */
1870 connmgr_is_any_controller_admitted(const struct connmgr
*mgr
)
1872 const struct ofconn
*ofconn
;
1874 HMAP_FOR_EACH (ofconn
, hmap_node
, &mgr
->controllers
) {
1875 if (rconn_is_admitted(ofconn
->rconn
)) {
1882 /* In-band configuration. */
1884 static bool any_extras_changed(const struct connmgr
*,
1885 const struct sockaddr_in
*extras
, size_t n
);
1887 /* Sets the 'n' TCP port addresses in 'extras' as ones to which 'mgr''s
1888 * in-band control should guarantee access, in the same way that in-band
1889 * control guarantees access to OpenFlow controllers. */
1891 connmgr_set_extra_in_band_remotes(struct connmgr
*mgr
,
1892 const struct sockaddr_in
*extras
, size_t n
)
1894 if (!any_extras_changed(mgr
, extras
, n
)) {
1898 free(mgr
->extra_in_band_remotes
);
1899 mgr
->n_extra_remotes
= n
;
1900 mgr
->extra_in_band_remotes
= xmemdup(extras
, n
* sizeof *extras
);
1902 update_in_band_remotes(mgr
);
1905 /* Sets the OpenFlow queue used by flows set up by in-band control on
1906 * 'mgr' to 'queue_id'. If 'queue_id' is negative, then in-band control
1907 * flows will use the default queue. */
1909 connmgr_set_in_band_queue(struct connmgr
*mgr
, int queue_id
)
1911 if (queue_id
!= mgr
->in_band_queue
) {
1912 mgr
->in_band_queue
= queue_id
;
1913 update_in_band_remotes(mgr
);
1918 any_extras_changed(const struct connmgr
*mgr
,
1919 const struct sockaddr_in
*extras
, size_t n
)
1923 if (n
!= mgr
->n_extra_remotes
) {
1927 for (i
= 0; i
< n
; i
++) {
1928 const struct sockaddr_in
*old
= &mgr
->extra_in_band_remotes
[i
];
1929 const struct sockaddr_in
*new = &extras
[i
];
1931 if (old
->sin_addr
.s_addr
!= new->sin_addr
.s_addr
||
1932 old
->sin_port
!= new->sin_port
) {
1940 /* In-band implementation. */
1943 connmgr_has_in_band(struct connmgr
*mgr
)
1945 return mgr
->in_band
!= NULL
;
1948 /* Fail-open and in-band implementation. */
1950 /* Called by 'ofproto' after all flows have been flushed, to allow fail-open
1951 * and standalone mode to re-create their flows.
1953 * In-band control has more sophisticated code that manages flows itself. */
1955 connmgr_flushed(struct connmgr
*mgr
)
1956 OVS_EXCLUDED(ofproto_mutex
)
1958 if (mgr
->fail_open
) {
1959 fail_open_flushed(mgr
->fail_open
);
1962 /* If there are no controllers and we're in standalone mode, set up a flow
1963 * that matches every packet and directs them to OFPP_NORMAL (which goes to
1964 * us). Otherwise, the switch is in secure mode and we won't pass any
1965 * traffic until a controller has been defined and it tells us to do so. */
1966 if (!connmgr_has_controllers(mgr
)
1967 && mgr
->fail_mode
== OFPROTO_FAIL_STANDALONE
) {
1968 struct ofpbuf ofpacts
;
1971 ofpbuf_init(&ofpacts
, OFPACT_OUTPUT_SIZE
);
1972 ofpact_put_OUTPUT(&ofpacts
)->port
= OFPP_NORMAL
;
1973 ofpact_pad(&ofpacts
);
1975 match_init_catchall(&match
);
1976 ofproto_add_flow(mgr
->ofproto
, &match
, 0, ofpbuf_data(&ofpacts
),
1977 ofpbuf_size(&ofpacts
));
1979 ofpbuf_uninit(&ofpacts
);
1983 /* Creates a new ofservice for 'target' in 'mgr'. Returns 0 if successful,
1984 * otherwise a positive errno value.
1986 * ofservice_reconfigure() must be called to fully configure the new
1989 ofservice_create(struct connmgr
*mgr
, const char *target
,
1990 uint32_t allowed_versions
, uint8_t dscp
)
1992 struct ofservice
*ofservice
;
1993 struct pvconn
*pvconn
;
1996 error
= pvconn_open(target
, allowed_versions
, dscp
, &pvconn
);
2001 ofservice
= xzalloc(sizeof *ofservice
);
2002 hmap_insert(&mgr
->services
, &ofservice
->node
, hash_string(target
, 0));
2003 ofservice
->pvconn
= pvconn
;
2004 ofservice
->allowed_versions
= allowed_versions
;
2010 ofservice_destroy(struct connmgr
*mgr
, struct ofservice
*ofservice
)
2012 hmap_remove(&mgr
->services
, &ofservice
->node
);
2013 pvconn_close(ofservice
->pvconn
);
2018 ofservice_reconfigure(struct ofservice
*ofservice
,
2019 const struct ofproto_controller
*c
)
2021 ofservice
->probe_interval
= c
->probe_interval
;
2022 ofservice
->rate_limit
= c
->rate_limit
;
2023 ofservice
->burst_limit
= c
->burst_limit
;
2024 ofservice
->enable_async_msgs
= c
->enable_async_msgs
;
2025 ofservice
->dscp
= c
->dscp
;
2028 /* Finds and returns the ofservice within 'mgr' that has the given
2029 * 'target', or a null pointer if none exists. */
2030 static struct ofservice
*
2031 ofservice_lookup(struct connmgr
*mgr
, const char *target
)
2033 struct ofservice
*ofservice
;
2035 HMAP_FOR_EACH_WITH_HASH (ofservice
, node
, hash_string(target
, 0),
2037 if (!strcmp(pvconn_get_name(ofservice
->pvconn
), target
)) {
2044 /* Flow monitors (NXST_FLOW_MONITOR). */
2046 /* A counter incremented when something significant happens to an OpenFlow
2049 * - When a rule is added, its 'add_seqno' and 'modify_seqno' are set to
2050 * the current value (which is then incremented).
2052 * - When a rule is modified, its 'modify_seqno' is set to the current
2053 * value (which is then incremented).
2055 * Thus, by comparing an old value of monitor_seqno against a rule's
2056 * 'add_seqno', one can tell whether the rule was added before or after the old
2057 * value was read, and similarly for 'modify_seqno'.
2059 * 32 bits should normally be sufficient (and would be nice, to save space in
2060 * each rule) but then we'd have to have some special cases for wraparound.
2062 * We initialize monitor_seqno to 1 to allow 0 to be used as an invalid
2064 static uint64_t monitor_seqno
= 1;
2066 COVERAGE_DEFINE(ofmonitor_pause
);
2067 COVERAGE_DEFINE(ofmonitor_resume
);
2070 ofmonitor_create(const struct ofputil_flow_monitor_request
*request
,
2071 struct ofconn
*ofconn
, struct ofmonitor
**monitorp
)
2072 OVS_REQUIRES(ofproto_mutex
)
2074 struct ofmonitor
*m
;
2078 m
= ofmonitor_lookup(ofconn
, request
->id
);
2080 return OFPERR_OFPMOFC_MONITOR_EXISTS
;
2083 m
= xmalloc(sizeof *m
);
2085 hmap_insert(&ofconn
->monitors
, &m
->ofconn_node
, hash_int(request
->id
, 0));
2086 m
->id
= request
->id
;
2087 m
->flags
= request
->flags
;
2088 m
->out_port
= request
->out_port
;
2089 m
->table_id
= request
->table_id
;
2090 minimatch_init(&m
->match
, &request
->match
);
2097 ofmonitor_lookup(struct ofconn
*ofconn
, uint32_t id
)
2098 OVS_REQUIRES(ofproto_mutex
)
2100 struct ofmonitor
*m
;
2102 HMAP_FOR_EACH_IN_BUCKET (m
, ofconn_node
, hash_int(id
, 0),
2103 &ofconn
->monitors
) {
2112 ofmonitor_destroy(struct ofmonitor
*m
)
2113 OVS_REQUIRES(ofproto_mutex
)
2116 minimatch_destroy(&m
->match
);
2117 hmap_remove(&m
->ofconn
->monitors
, &m
->ofconn_node
);
2123 ofmonitor_report(struct connmgr
*mgr
, struct rule
*rule
,
2124 enum nx_flow_update_event event
,
2125 enum ofp_flow_removed_reason reason
,
2126 const struct ofconn
*abbrev_ofconn
, ovs_be32 abbrev_xid
,
2127 const struct rule_actions
*old_actions
)
2128 OVS_REQUIRES(ofproto_mutex
)
2130 enum nx_flow_monitor_flags update
;
2131 struct ofconn
*ofconn
;
2133 if (rule_is_hidden(rule
)) {
2140 rule
->add_seqno
= rule
->modify_seqno
= monitor_seqno
++;
2144 update
= NXFMF_DELETE
;
2147 case NXFME_MODIFIED
:
2148 update
= NXFMF_MODIFY
;
2149 rule
->modify_seqno
= monitor_seqno
++;
2157 LIST_FOR_EACH (ofconn
, node
, &mgr
->all_conns
) {
2158 enum nx_flow_monitor_flags flags
= 0;
2159 struct ofmonitor
*m
;
2161 if (ofconn
->monitor_paused
) {
2162 /* Only send NXFME_DELETED notifications for flows that were added
2163 * before we paused. */
2164 if (event
!= NXFME_DELETED
2165 || rule
->add_seqno
> ofconn
->monitor_paused
) {
2170 HMAP_FOR_EACH (m
, ofconn_node
, &ofconn
->monitors
) {
2171 if (m
->flags
& update
2172 && (m
->table_id
== 0xff || m
->table_id
== rule
->table_id
)
2173 && (ofproto_rule_has_out_port(rule
, m
->out_port
)
2175 && ofpacts_output_to_port(old_actions
->ofpacts
,
2176 old_actions
->ofpacts_len
,
2178 && cls_rule_is_loose_match(&rule
->cr
, &m
->match
)) {
2184 if (list_is_empty(&ofconn
->updates
)) {
2185 ofputil_start_flow_update(&ofconn
->updates
);
2186 ofconn
->sent_abbrev_update
= false;
2189 if (flags
& NXFMF_OWN
|| ofconn
!= abbrev_ofconn
2190 || ofconn
->monitor_paused
) {
2191 struct ofputil_flow_update fu
;
2195 fu
.reason
= event
== NXFME_DELETED
? reason
: 0;
2196 fu
.table_id
= rule
->table_id
;
2197 fu
.cookie
= rule
->flow_cookie
;
2198 minimatch_expand(&rule
->cr
.match
, &match
);
2200 fu
.priority
= rule
->cr
.priority
;
2202 ovs_mutex_lock(&rule
->mutex
);
2203 fu
.idle_timeout
= rule
->idle_timeout
;
2204 fu
.hard_timeout
= rule
->hard_timeout
;
2205 ovs_mutex_unlock(&rule
->mutex
);
2207 if (flags
& NXFMF_ACTIONS
) {
2208 const struct rule_actions
*actions
= rule_get_actions(rule
);
2209 fu
.ofpacts
= actions
->ofpacts
;
2210 fu
.ofpacts_len
= actions
->ofpacts_len
;
2215 ofputil_append_flow_update(&fu
, &ofconn
->updates
);
2216 } else if (!ofconn
->sent_abbrev_update
) {
2217 struct ofputil_flow_update fu
;
2219 fu
.event
= NXFME_ABBREV
;
2220 fu
.xid
= abbrev_xid
;
2221 ofputil_append_flow_update(&fu
, &ofconn
->updates
);
2223 ofconn
->sent_abbrev_update
= true;
2230 ofmonitor_flush(struct connmgr
*mgr
)
2231 OVS_REQUIRES(ofproto_mutex
)
2233 struct ofconn
*ofconn
;
2235 LIST_FOR_EACH (ofconn
, node
, &mgr
->all_conns
) {
2236 struct ofpbuf
*msg
, *next
;
2238 LIST_FOR_EACH_SAFE (msg
, next
, list_node
, &ofconn
->updates
) {
2239 unsigned int n_bytes
;
2241 list_remove(&msg
->list_node
);
2242 ofconn_send(ofconn
, msg
, ofconn
->monitor_counter
);
2243 n_bytes
= rconn_packet_counter_n_bytes(ofconn
->monitor_counter
);
2244 if (!ofconn
->monitor_paused
&& n_bytes
> 128 * 1024) {
2245 struct ofpbuf
*pause
;
2247 COVERAGE_INC(ofmonitor_pause
);
2248 ofconn
->monitor_paused
= monitor_seqno
++;
2249 pause
= ofpraw_alloc_xid(OFPRAW_NXT_FLOW_MONITOR_PAUSED
,
2250 OFP10_VERSION
, htonl(0), 0);
2251 ofconn_send(ofconn
, pause
, ofconn
->monitor_counter
);
2258 ofmonitor_resume(struct ofconn
*ofconn
)
2259 OVS_REQUIRES(ofproto_mutex
)
2261 struct rule_collection rules
;
2262 struct ofpbuf
*resumed
;
2263 struct ofmonitor
*m
;
2266 rule_collection_init(&rules
);
2267 HMAP_FOR_EACH (m
, ofconn_node
, &ofconn
->monitors
) {
2268 ofmonitor_collect_resume_rules(m
, ofconn
->monitor_paused
, &rules
);
2272 ofmonitor_compose_refresh_updates(&rules
, &msgs
);
2274 resumed
= ofpraw_alloc_xid(OFPRAW_NXT_FLOW_MONITOR_RESUMED
, OFP10_VERSION
,
2276 list_push_back(&msgs
, &resumed
->list_node
);
2277 ofconn_send_replies(ofconn
, &msgs
);
2279 ofconn
->monitor_paused
= 0;
2283 ofmonitor_may_resume(const struct ofconn
*ofconn
)
2284 OVS_REQUIRES(ofproto_mutex
)
2286 return (ofconn
->monitor_paused
!= 0
2287 && !rconn_packet_counter_n_packets(ofconn
->monitor_counter
));
2291 ofmonitor_run(struct connmgr
*mgr
)
2293 struct ofconn
*ofconn
;
2295 ovs_mutex_lock(&ofproto_mutex
);
2296 LIST_FOR_EACH (ofconn
, node
, &mgr
->all_conns
) {
2297 if (ofmonitor_may_resume(ofconn
)) {
2298 COVERAGE_INC(ofmonitor_resume
);
2299 ofmonitor_resume(ofconn
);
2302 ovs_mutex_unlock(&ofproto_mutex
);
2306 ofmonitor_wait(struct connmgr
*mgr
)
2308 struct ofconn
*ofconn
;
2310 ovs_mutex_lock(&ofproto_mutex
);
2311 LIST_FOR_EACH (ofconn
, node
, &mgr
->all_conns
) {
2312 if (ofmonitor_may_resume(ofconn
)) {
2313 poll_immediate_wake();
2316 ovs_mutex_unlock(&ofproto_mutex
);