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
;
1001 /* Returns the currently configured packet in format for 'ofconn', one of
1004 * The default, if no other format has been set, is NXPIF_OPENFLOW10. */
1005 enum nx_packet_in_format
1006 ofconn_get_packet_in_format(struct ofconn
*ofconn
)
1008 return ofconn
->packet_in_format
;
1011 /* Sets the packet in format for 'ofconn' to 'packet_in_format' (one of
1014 ofconn_set_packet_in_format(struct ofconn
*ofconn
,
1015 enum nx_packet_in_format packet_in_format
)
1017 ofconn
->packet_in_format
= packet_in_format
;
1020 /* Sets the controller connection ID for 'ofconn' to 'controller_id'.
1022 * The connection controller ID is used for OFPP_CONTROLLER and
1023 * NXAST_CONTROLLER actions. See "struct nx_action_controller" for details. */
1025 ofconn_set_controller_id(struct ofconn
*ofconn
, uint16_t controller_id
)
1027 ofconn
->controller_id
= controller_id
;
1030 /* Returns the default miss send length for 'ofconn'. */
1032 ofconn_get_miss_send_len(const struct ofconn
*ofconn
)
1034 return ofconn
->miss_send_len
;
1037 /* Sets the default miss send length for 'ofconn' to 'miss_send_len'. */
1039 ofconn_set_miss_send_len(struct ofconn
*ofconn
, int miss_send_len
)
1041 ofconn
->miss_send_len
= miss_send_len
;
1045 ofconn_set_async_config(struct ofconn
*ofconn
,
1046 const uint32_t master_masks
[OAM_N_TYPES
],
1047 const uint32_t slave_masks
[OAM_N_TYPES
])
1049 size_t size
= sizeof ofconn
->master_async_config
;
1050 memcpy(ofconn
->master_async_config
, master_masks
, size
);
1051 memcpy(ofconn
->slave_async_config
, slave_masks
, size
);
1055 ofconn_get_async_config(struct ofconn
*ofconn
,
1056 uint32_t *master_masks
, uint32_t *slave_masks
)
1058 size_t size
= sizeof ofconn
->master_async_config
;
1059 memcpy(master_masks
, ofconn
->master_async_config
, size
);
1060 memcpy(slave_masks
, ofconn
->slave_async_config
, size
);
1063 /* Sends 'msg' on 'ofconn', accounting it as a reply. (If there is a
1064 * sufficient number of OpenFlow replies in-flight on a single ofconn, then the
1065 * connmgr will stop accepting new OpenFlow requests on that ofconn until the
1066 * controller has accepted some of the replies.) */
1068 ofconn_send_reply(const struct ofconn
*ofconn
, struct ofpbuf
*msg
)
1070 ofconn_send(ofconn
, msg
, ofconn
->reply_counter
);
1073 /* Sends each of the messages in list 'replies' on 'ofconn' in order,
1074 * accounting them as replies. */
1076 ofconn_send_replies(const struct ofconn
*ofconn
, struct list
*replies
)
1078 struct ofpbuf
*reply
, *next
;
1080 LIST_FOR_EACH_SAFE (reply
, next
, list_node
, replies
) {
1081 list_remove(&reply
->list_node
);
1082 ofconn_send_reply(ofconn
, reply
);
1086 /* Sends 'error' on 'ofconn', as a reply to 'request'. Only at most the
1087 * first 64 bytes of 'request' are used. */
1089 ofconn_send_error(const struct ofconn
*ofconn
,
1090 const struct ofp_header
*request
, enum ofperr error
)
1092 static struct vlog_rate_limit err_rl
= VLOG_RATE_LIMIT_INIT(10, 10);
1093 struct ofpbuf
*reply
;
1095 reply
= ofperr_encode_reply(error
, request
);
1096 if (!VLOG_DROP_INFO(&err_rl
)) {
1097 const char *type_name
;
1101 request_len
= ntohs(request
->length
);
1102 type_name
= (!ofpraw_decode_partial(&raw
, request
,
1103 MIN(64, request_len
))
1104 ? ofpraw_get_name(raw
)
1107 VLOG_INFO("%s: sending %s error reply to %s message",
1108 rconn_get_name(ofconn
->rconn
), ofperr_to_string(error
),
1111 ofconn_send_reply(ofconn
, reply
);
1114 /* Same as pktbuf_retrieve(), using the pktbuf owned by 'ofconn'. */
1116 ofconn_pktbuf_retrieve(struct ofconn
*ofconn
, uint32_t id
,
1117 struct ofpbuf
**bufferp
, ofp_port_t
*in_port
)
1119 return pktbuf_retrieve(ofconn
->pktbuf
, id
, bufferp
, in_port
);
1122 /* Reports that a flow_mod operation of the type specified by 'command' was
1123 * successfully executed by 'ofconn', so that the connmgr can log it. */
1125 ofconn_report_flow_mod(struct ofconn
*ofconn
,
1126 enum ofp_flow_mod_command command
)
1136 case OFPFC_MODIFY_STRICT
:
1141 case OFPFC_DELETE_STRICT
:
1147 if (ofconn
->next_op_report
== LLONG_MAX
) {
1148 ofconn
->first_op
= now
;
1149 ofconn
->next_op_report
= MAX(now
+ 10 * 1000, ofconn
->op_backoff
);
1150 ofconn
->op_backoff
= ofconn
->next_op_report
+ 60 * 1000;
1152 ofconn
->last_op
= now
;
1156 ofconn_get_bundles(struct ofconn
*ofconn
)
1158 return &ofconn
->bundles
;
1162 /* Private ofconn functions. */
1165 ofconn_get_target(const struct ofconn
*ofconn
)
1167 return rconn_get_target(ofconn
->rconn
);
1170 static struct ofconn
*
1171 ofconn_create(struct connmgr
*mgr
, struct rconn
*rconn
, enum ofconn_type type
,
1172 bool enable_async_msgs
)
1174 struct ofconn
*ofconn
;
1176 ofconn
= xzalloc(sizeof *ofconn
);
1177 ofconn
->connmgr
= mgr
;
1178 list_push_back(&mgr
->all_conns
, &ofconn
->node
);
1179 ofconn
->rconn
= rconn
;
1180 ofconn
->type
= type
;
1181 ofconn
->enable_async_msgs
= enable_async_msgs
;
1183 hmap_init(&ofconn
->monitors
);
1184 list_init(&ofconn
->updates
);
1186 hmap_init(&ofconn
->bundles
);
1188 ofconn_flush(ofconn
);
1193 /* Clears all of the state in 'ofconn' that should not persist from one
1194 * connection to the next. */
1196 ofconn_flush(struct ofconn
*ofconn
)
1197 OVS_REQUIRES(ofproto_mutex
)
1199 struct ofmonitor
*monitor
, *next_monitor
;
1202 ofconn_log_flow_mods(ofconn
);
1204 ofconn
->role
= OFPCR12_ROLE_EQUAL
;
1205 ofconn_set_protocol(ofconn
, OFPUTIL_P_NONE
);
1206 ofconn
->packet_in_format
= NXPIF_OPENFLOW10
;
1208 rconn_packet_counter_destroy(ofconn
->packet_in_counter
);
1209 ofconn
->packet_in_counter
= rconn_packet_counter_create();
1210 for (i
= 0; i
< N_SCHEDULERS
; i
++) {
1211 if (ofconn
->schedulers
[i
]) {
1214 pinsched_get_limits(ofconn
->schedulers
[i
], &rate
, &burst
);
1215 pinsched_destroy(ofconn
->schedulers
[i
]);
1216 ofconn
->schedulers
[i
] = pinsched_create(rate
, burst
);
1219 if (ofconn
->pktbuf
) {
1220 pktbuf_destroy(ofconn
->pktbuf
);
1221 ofconn
->pktbuf
= pktbuf_create();
1223 ofconn
->miss_send_len
= (ofconn
->type
== OFCONN_PRIMARY
1224 ? OFP_DEFAULT_MISS_SEND_LEN
1226 ofconn
->controller_id
= 0;
1228 rconn_packet_counter_destroy(ofconn
->reply_counter
);
1229 ofconn
->reply_counter
= rconn_packet_counter_create();
1231 if (ofconn
->enable_async_msgs
) {
1232 uint32_t *master
= ofconn
->master_async_config
;
1233 uint32_t *slave
= ofconn
->slave_async_config
;
1235 /* "master" and "other" roles get all asynchronous messages by default,
1236 * except that the controller needs to enable nonstandard "packet-in"
1237 * reasons itself. */
1238 master
[OAM_PACKET_IN
] = (1u << OFPR_NO_MATCH
) | (1u << OFPR_ACTION
);
1239 master
[OAM_PORT_STATUS
] = ((1u << OFPPR_ADD
)
1240 | (1u << OFPPR_DELETE
)
1241 | (1u << OFPPR_MODIFY
));
1242 master
[OAM_FLOW_REMOVED
] = ((1u << OFPRR_IDLE_TIMEOUT
)
1243 | (1u << OFPRR_HARD_TIMEOUT
)
1244 | (1u << OFPRR_DELETE
));
1246 /* "slave" role gets port status updates by default. */
1247 slave
[OAM_PACKET_IN
] = 0;
1248 slave
[OAM_PORT_STATUS
] = ((1u << OFPPR_ADD
)
1249 | (1u << OFPPR_DELETE
)
1250 | (1u << OFPPR_MODIFY
));
1251 slave
[OAM_FLOW_REMOVED
] = 0;
1253 memset(ofconn
->master_async_config
, 0,
1254 sizeof ofconn
->master_async_config
);
1255 memset(ofconn
->slave_async_config
, 0,
1256 sizeof ofconn
->slave_async_config
);
1259 ofconn
->n_add
= ofconn
->n_delete
= ofconn
->n_modify
= 0;
1260 ofconn
->first_op
= ofconn
->last_op
= LLONG_MIN
;
1261 ofconn
->next_op_report
= LLONG_MAX
;
1262 ofconn
->op_backoff
= LLONG_MIN
;
1264 HMAP_FOR_EACH_SAFE (monitor
, next_monitor
, ofconn_node
,
1265 &ofconn
->monitors
) {
1266 ofmonitor_destroy(monitor
);
1268 rconn_packet_counter_destroy(ofconn
->monitor_counter
);
1269 ofconn
->monitor_counter
= rconn_packet_counter_create();
1270 ofpbuf_list_delete(&ofconn
->updates
); /* ...but it should be empty. */
1274 ofconn_destroy(struct ofconn
*ofconn
)
1275 OVS_REQUIRES(ofproto_mutex
)
1277 ofconn_flush(ofconn
);
1279 if (ofconn
->type
== OFCONN_PRIMARY
) {
1280 hmap_remove(&ofconn
->connmgr
->controllers
, &ofconn
->hmap_node
);
1283 ofp_bundle_remove_all(ofconn
);
1285 hmap_destroy(&ofconn
->monitors
);
1286 list_remove(&ofconn
->node
);
1287 rconn_destroy(ofconn
->rconn
);
1288 rconn_packet_counter_destroy(ofconn
->packet_in_counter
);
1289 rconn_packet_counter_destroy(ofconn
->reply_counter
);
1290 pktbuf_destroy(ofconn
->pktbuf
);
1291 rconn_packet_counter_destroy(ofconn
->monitor_counter
);
1295 /* Reconfigures 'ofconn' to match 'c'. 'ofconn' and 'c' must have the same
1298 ofconn_reconfigure(struct ofconn
*ofconn
, const struct ofproto_controller
*c
)
1302 ofconn
->band
= c
->band
;
1303 ofconn
->enable_async_msgs
= c
->enable_async_msgs
;
1305 rconn_set_max_backoff(ofconn
->rconn
, c
->max_backoff
);
1307 probe_interval
= c
->probe_interval
? MAX(c
->probe_interval
, 5) : 0;
1308 rconn_set_probe_interval(ofconn
->rconn
, probe_interval
);
1310 ofconn_set_rate_limit(ofconn
, c
->rate_limit
, c
->burst_limit
);
1312 /* If dscp value changed reconnect. */
1313 if (c
->dscp
!= rconn_get_dscp(ofconn
->rconn
)) {
1314 rconn_set_dscp(ofconn
->rconn
, c
->dscp
);
1315 rconn_reconnect(ofconn
->rconn
);
1319 /* Returns true if it makes sense for 'ofconn' to receive and process OpenFlow
1322 ofconn_may_recv(const struct ofconn
*ofconn
)
1324 int count
= rconn_packet_counter_n_packets(ofconn
->reply_counter
);
1325 return count
< OFCONN_REPLY_MAX
;
1329 ofconn_run(struct ofconn
*ofconn
,
1330 void (*handle_openflow
)(struct ofconn
*,
1331 const struct ofpbuf
*ofp_msg
))
1333 struct connmgr
*mgr
= ofconn
->connmgr
;
1336 for (i
= 0; i
< N_SCHEDULERS
; i
++) {
1339 pinsched_run(ofconn
->schedulers
[i
], &txq
);
1340 do_send_packet_ins(ofconn
, &txq
);
1343 rconn_run(ofconn
->rconn
);
1345 /* Limit the number of iterations to avoid starving other tasks. */
1346 for (i
= 0; i
< 50 && ofconn_may_recv(ofconn
); i
++) {
1347 struct ofpbuf
*of_msg
= rconn_recv(ofconn
->rconn
);
1352 if (mgr
->fail_open
) {
1353 fail_open_maybe_recover(mgr
->fail_open
);
1356 handle_openflow(ofconn
, of_msg
);
1357 ofpbuf_delete(of_msg
);
1360 if (time_msec() >= ofconn
->next_op_report
) {
1361 ofconn_log_flow_mods(ofconn
);
1364 ovs_mutex_lock(&ofproto_mutex
);
1365 if (!rconn_is_alive(ofconn
->rconn
)) {
1366 ofconn_destroy(ofconn
);
1367 } else if (!rconn_is_connected(ofconn
->rconn
)) {
1368 ofconn_flush(ofconn
);
1370 ovs_mutex_unlock(&ofproto_mutex
);
1374 ofconn_wait(struct ofconn
*ofconn
)
1378 for (i
= 0; i
< N_SCHEDULERS
; i
++) {
1379 pinsched_wait(ofconn
->schedulers
[i
]);
1381 rconn_run_wait(ofconn
->rconn
);
1382 if (ofconn_may_recv(ofconn
)) {
1383 rconn_recv_wait(ofconn
->rconn
);
1385 if (ofconn
->next_op_report
!= LLONG_MAX
) {
1386 poll_timer_wait_until(ofconn
->next_op_report
);
1391 ofconn_log_flow_mods(struct ofconn
*ofconn
)
1393 int n_flow_mods
= ofconn
->n_add
+ ofconn
->n_delete
+ ofconn
->n_modify
;
1395 long long int ago
= (time_msec() - ofconn
->first_op
) / 1000;
1396 long long int interval
= (ofconn
->last_op
- ofconn
->first_op
) / 1000;
1400 ds_put_format(&s
, "%d flow_mods ", n_flow_mods
);
1401 if (interval
== ago
) {
1402 ds_put_format(&s
, "in the last %lld s", ago
);
1403 } else if (interval
) {
1404 ds_put_format(&s
, "in the %lld s starting %lld s ago",
1407 ds_put_format(&s
, "%lld s ago", ago
);
1410 ds_put_cstr(&s
, " (");
1411 if (ofconn
->n_add
) {
1412 ds_put_format(&s
, "%d adds, ", ofconn
->n_add
);
1414 if (ofconn
->n_delete
) {
1415 ds_put_format(&s
, "%d deletes, ", ofconn
->n_delete
);
1417 if (ofconn
->n_modify
) {
1418 ds_put_format(&s
, "%d modifications, ", ofconn
->n_modify
);
1421 ds_put_char(&s
, ')');
1423 VLOG_INFO("%s: %s", rconn_get_name(ofconn
->rconn
), ds_cstr(&s
));
1426 ofconn
->n_add
= ofconn
->n_delete
= ofconn
->n_modify
= 0;
1428 ofconn
->next_op_report
= LLONG_MAX
;
1431 /* Returns true if 'ofconn' should receive asynchronous messages of the given
1432 * OAM_* 'type' and 'reason', which should be a OFPR_* value for OAM_PACKET_IN,
1433 * a OFPPR_* value for OAM_PORT_STATUS, or an OFPRR_* value for
1434 * OAM_FLOW_REMOVED. Returns false if the message should not be sent on
1437 ofconn_receives_async_msg(const struct ofconn
*ofconn
,
1438 enum ofconn_async_msg_type type
,
1439 unsigned int reason
)
1441 const uint32_t *async_config
;
1443 ovs_assert(reason
< 32);
1444 ovs_assert((unsigned int) type
< OAM_N_TYPES
);
1446 if (ofconn_get_protocol(ofconn
) == OFPUTIL_P_NONE
1447 || !rconn_is_connected(ofconn
->rconn
)) {
1451 /* Keep the following code in sync with the documentation in the
1452 * "Asynchronous Messages" section in DESIGN. */
1454 if (ofconn
->type
== OFCONN_SERVICE
&& !ofconn
->miss_send_len
) {
1455 /* Service connections don't get asynchronous messages unless they have
1456 * explicitly asked for them by setting a nonzero miss send length. */
1460 async_config
= (ofconn
->role
== OFPCR12_ROLE_SLAVE
1461 ? ofconn
->slave_async_config
1462 : ofconn
->master_async_config
);
1463 if (!(async_config
[type
] & (1u << reason
))) {
1470 /* The default "table-miss" behaviour for OpenFlow1.3+ is to drop the
1471 * packet rather than to send the packet to the controller.
1473 * This function returns false to indicate the packet should be dropped if
1474 * the controller action was the result of the default table-miss behaviour
1475 * and the controller is using OpenFlow1.3+.
1477 * Otherwise true is returned to indicate the packet should be forwarded to
1480 ofconn_wants_packet_in_on_miss(struct ofconn
*ofconn
,
1481 const struct ofproto_packet_in
*pin
)
1483 if (pin
->miss_type
== OFPROTO_PACKET_IN_MISS_WITHOUT_FLOW
) {
1484 enum ofputil_protocol protocol
= ofconn_get_protocol(ofconn
);
1486 if (protocol
!= OFPUTIL_P_NONE
1487 && ofputil_protocol_to_ofp_version(protocol
) >= OFP13_VERSION
1488 && (ofproto_table_get_miss_config(ofconn
->connmgr
->ofproto
,
1490 == OFPUTIL_TABLE_MISS_DEFAULT
)) {
1497 /* The default "table-miss" behaviour for OpenFlow1.3+ is to drop the
1498 * packet rather than to send the packet to the controller.
1500 * This function returns true to indicate that a packet_in message
1501 * for a "table-miss" should be sent to at least one controller.
1502 * That is there is at least one controller with controller_id 0
1503 * which connected using an OpenFlow version earlier than OpenFlow1.3.
1507 * This logic assumes that "table-miss" packet_in messages
1508 * are always sent to controller_id 0. */
1510 connmgr_wants_packet_in_on_miss(struct connmgr
*mgr
) OVS_EXCLUDED(ofproto_mutex
)
1512 struct ofconn
*ofconn
;
1514 ovs_mutex_lock(&ofproto_mutex
);
1515 LIST_FOR_EACH (ofconn
, node
, &mgr
->all_conns
) {
1516 enum ofputil_protocol protocol
= ofconn_get_protocol(ofconn
);
1518 if (ofconn
->controller_id
== 0 &&
1519 (protocol
== OFPUTIL_P_NONE
||
1520 ofputil_protocol_to_ofp_version(protocol
) < OFP13_VERSION
)) {
1521 ovs_mutex_unlock(&ofproto_mutex
);
1525 ovs_mutex_unlock(&ofproto_mutex
);
1530 /* Returns a human-readable name for an OpenFlow connection between 'mgr' and
1531 * 'target', suitable for use in log messages for identifying the connection.
1533 * The name is dynamically allocated. The caller should free it (with free())
1534 * when it is no longer needed. */
1536 ofconn_make_name(const struct connmgr
*mgr
, const char *target
)
1538 return xasprintf("%s<->%s", mgr
->name
, target
);
1542 ofconn_set_rate_limit(struct ofconn
*ofconn
, int rate
, int burst
)
1546 for (i
= 0; i
< N_SCHEDULERS
; i
++) {
1547 struct pinsched
**s
= &ofconn
->schedulers
[i
];
1551 *s
= pinsched_create(rate
, burst
);
1553 pinsched_set_limits(*s
, rate
, burst
);
1556 pinsched_destroy(*s
);
1563 ofconn_send(const struct ofconn
*ofconn
, struct ofpbuf
*msg
,
1564 struct rconn_packet_counter
*counter
)
1566 ofpmsg_update_length(msg
);
1567 rconn_send(ofconn
->rconn
, msg
, counter
);
1570 /* Sending asynchronous messages. */
1572 static void schedule_packet_in(struct ofconn
*, struct ofproto_packet_in
,
1573 enum ofp_packet_in_reason wire_reason
);
1575 /* Sends an OFPT_PORT_STATUS message with 'opp' and 'reason' to appropriate
1576 * controllers managed by 'mgr'. For messages caused by a controller
1577 * OFPT_PORT_MOD, specify 'source' as the controller connection that sent the
1578 * request; otherwise, specify 'source' as NULL. */
1580 connmgr_send_port_status(struct connmgr
*mgr
, struct ofconn
*source
,
1581 const struct ofputil_phy_port
*pp
, uint8_t reason
)
1583 /* XXX Should limit the number of queued port status change messages. */
1584 struct ofputil_port_status ps
;
1585 struct ofconn
*ofconn
;
1589 LIST_FOR_EACH (ofconn
, node
, &mgr
->all_conns
) {
1590 if (ofconn_receives_async_msg(ofconn
, OAM_PORT_STATUS
, reason
)) {
1593 /* Before 1.5, OpenFlow specified that OFPT_PORT_MOD should not
1594 * generate OFPT_PORT_STATUS messages. That requirement was a
1595 * relic of how OpenFlow originally supported a single controller,
1596 * so that one could expect the controller to already know the
1597 * changes it had made.
1599 * EXT-338 changes OpenFlow 1.5 OFPT_PORT_MOD to send
1600 * OFPT_PORT_STATUS messages to every controller. This is
1601 * obviously more useful in the multi-controller case. We could
1602 * always implement it that way in OVS, but that would risk
1603 * confusing controllers that are intended for single-controller
1604 * use only. (Imagine a controller that generates an OFPT_PORT_MOD
1605 * in response to any OFPT_PORT_STATUS!)
1607 * So this compromises: for OpenFlow 1.4 and earlier, it generates
1608 * OFPT_PORT_STATUS for OFPT_PORT_MOD, but not back to the
1609 * originating controller. In a single-controller environment, in
1610 * particular, this means that it will never generate
1611 * OFPT_PORT_STATUS for OFPT_PORT_MOD at all. */
1612 if (ofconn
== source
1613 && rconn_get_version(ofconn
->rconn
) < OFP15_VERSION
) {
1617 msg
= ofputil_encode_port_status(&ps
, ofconn_get_protocol(ofconn
));
1618 ofconn_send(ofconn
, msg
, NULL
);
1623 /* Sends an OFPT_FLOW_REMOVED or NXT_FLOW_REMOVED message based on 'fr' to
1624 * appropriate controllers managed by 'mgr'. */
1626 connmgr_send_flow_removed(struct connmgr
*mgr
,
1627 const struct ofputil_flow_removed
*fr
)
1629 struct ofconn
*ofconn
;
1631 LIST_FOR_EACH (ofconn
, node
, &mgr
->all_conns
) {
1632 if (ofconn_receives_async_msg(ofconn
, OAM_FLOW_REMOVED
, fr
->reason
)) {
1635 /* Account flow expirations as replies to OpenFlow requests. That
1636 * works because preventing OpenFlow requests from being processed
1637 * also prevents new flows from being added (and expiring). (It
1638 * also prevents processing OpenFlow requests that would not add
1639 * new flows, so it is imperfect.) */
1640 msg
= ofputil_encode_flow_removed(fr
, ofconn_get_protocol(ofconn
));
1641 ofconn_send_reply(ofconn
, msg
);
1646 /* Normally a send-to-controller action uses reason OFPR_ACTION. However, in
1647 * OpenFlow 1.3 and later, packet_ins generated by a send-to-controller action
1648 * in a "table-miss" flow (one with priority 0 and completely wildcarded) are
1649 * sent as OFPR_NO_MATCH. This function returns the reason that should
1650 * actually be sent on 'ofconn' for 'pin'. */
1651 static enum ofp_packet_in_reason
1652 wire_reason(struct ofconn
*ofconn
, const struct ofproto_packet_in
*pin
)
1654 if (pin
->miss_type
== OFPROTO_PACKET_IN_MISS_FLOW
1655 && pin
->up
.reason
== OFPR_ACTION
) {
1656 enum ofputil_protocol protocol
= ofconn_get_protocol(ofconn
);
1658 if (protocol
!= OFPUTIL_P_NONE
1659 && ofputil_protocol_to_ofp_version(protocol
) >= OFP13_VERSION
) {
1660 return OFPR_NO_MATCH
;
1663 return pin
->up
.reason
;
1666 /* Given 'pin', sends an OFPT_PACKET_IN message to each OpenFlow controller as
1667 * necessary according to their individual configurations.
1669 * The caller doesn't need to fill in pin->buffer_id or pin->total_len. */
1671 connmgr_send_packet_in(struct connmgr
*mgr
,
1672 const struct ofproto_packet_in
*pin
)
1674 struct ofconn
*ofconn
;
1676 LIST_FOR_EACH (ofconn
, node
, &mgr
->all_conns
) {
1677 enum ofp_packet_in_reason reason
= wire_reason(ofconn
, pin
);
1679 if (ofconn_wants_packet_in_on_miss(ofconn
, pin
)
1680 && ofconn_receives_async_msg(ofconn
, OAM_PACKET_IN
, pin
->up
.reason
)
1681 && ofconn
->controller_id
== pin
->controller_id
) {
1682 schedule_packet_in(ofconn
, *pin
, reason
);
1688 do_send_packet_ins(struct ofconn
*ofconn
, struct list
*txq
)
1690 struct ofpbuf
*pin
, *next_pin
;
1692 LIST_FOR_EACH_SAFE (pin
, next_pin
, list_node
, txq
) {
1693 list_remove(&pin
->list_node
);
1695 if (rconn_send_with_limit(ofconn
->rconn
, pin
,
1696 ofconn
->packet_in_counter
, 100) == EAGAIN
) {
1697 static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(5, 5);
1699 VLOG_INFO_RL(&rl
, "%s: dropping packet-in due to queue overflow",
1700 rconn_get_name(ofconn
->rconn
));
1705 /* Takes 'pin', composes an OpenFlow packet-in message from it, and passes it
1706 * to 'ofconn''s packet scheduler for sending. */
1708 schedule_packet_in(struct ofconn
*ofconn
, struct ofproto_packet_in pin
,
1709 enum ofp_packet_in_reason wire_reason
)
1711 struct connmgr
*mgr
= ofconn
->connmgr
;
1712 uint16_t controller_max_len
;
1715 pin
.up
.total_len
= pin
.up
.packet_len
;
1717 pin
.up
.reason
= wire_reason
;
1718 if (pin
.up
.reason
== OFPR_ACTION
) {
1719 controller_max_len
= pin
.send_len
; /* max_len */
1721 controller_max_len
= ofconn
->miss_send_len
;
1724 /* Get OpenFlow buffer_id.
1725 * For OpenFlow 1.2+, OFPCML_NO_BUFFER (== UINT16_MAX) specifies
1726 * unbuffered. This behaviour doesn't violate prior versions, too. */
1727 if (controller_max_len
== UINT16_MAX
) {
1728 pin
.up
.buffer_id
= UINT32_MAX
;
1729 } else if (mgr
->fail_open
&& fail_open_is_active(mgr
->fail_open
)) {
1730 pin
.up
.buffer_id
= pktbuf_get_null();
1731 } else if (!ofconn
->pktbuf
) {
1732 pin
.up
.buffer_id
= UINT32_MAX
;
1734 pin
.up
.buffer_id
= pktbuf_save(ofconn
->pktbuf
,
1735 pin
.up
.packet
, pin
.up
.packet_len
,
1736 pin
.up
.fmd
.in_port
);
1739 /* Figure out how much of the packet to send.
1740 * If not buffered, send the entire packet. Otherwise, depending on
1741 * the reason of packet-in, send what requested by the controller. */
1742 if (pin
.up
.buffer_id
!= UINT32_MAX
1743 && controller_max_len
< pin
.up
.packet_len
) {
1744 pin
.up
.packet_len
= controller_max_len
;
1747 /* Make OFPT_PACKET_IN and hand over to packet scheduler. */
1748 pinsched_send(ofconn
->schedulers
[pin
.up
.reason
== OFPR_NO_MATCH
? 0 : 1],
1750 ofputil_encode_packet_in(&pin
.up
,
1751 ofconn_get_protocol(ofconn
),
1752 ofconn
->packet_in_format
),
1754 do_send_packet_ins(ofconn
, &txq
);
1757 /* Fail-open settings. */
1759 /* Returns the failure handling mode (OFPROTO_FAIL_SECURE or
1760 * OFPROTO_FAIL_STANDALONE) for 'mgr'. */
1761 enum ofproto_fail_mode
1762 connmgr_get_fail_mode(const struct connmgr
*mgr
)
1764 return mgr
->fail_mode
;
1767 /* Sets the failure handling mode for 'mgr' to 'fail_mode' (either
1768 * OFPROTO_FAIL_SECURE or OFPROTO_FAIL_STANDALONE). */
1770 connmgr_set_fail_mode(struct connmgr
*mgr
, enum ofproto_fail_mode fail_mode
)
1772 if (mgr
->fail_mode
!= fail_mode
) {
1773 mgr
->fail_mode
= fail_mode
;
1774 update_fail_open(mgr
);
1775 if (!connmgr_has_controllers(mgr
)) {
1776 ofproto_flush_flows(mgr
->ofproto
);
1781 /* Fail-open implementation. */
1783 /* Returns the longest probe interval among the primary controllers configured
1784 * on 'mgr'. Returns 0 if there are no primary controllers. */
1786 connmgr_get_max_probe_interval(const struct connmgr
*mgr
)
1788 const struct ofconn
*ofconn
;
1789 int max_probe_interval
;
1791 max_probe_interval
= 0;
1792 HMAP_FOR_EACH (ofconn
, hmap_node
, &mgr
->controllers
) {
1793 int probe_interval
= rconn_get_probe_interval(ofconn
->rconn
);
1794 max_probe_interval
= MAX(max_probe_interval
, probe_interval
);
1796 return max_probe_interval
;
1799 /* Returns the number of seconds for which all of 'mgr's primary controllers
1800 * have been disconnected. Returns 0 if 'mgr' has no primary controllers. */
1802 connmgr_failure_duration(const struct connmgr
*mgr
)
1804 const struct ofconn
*ofconn
;
1805 int min_failure_duration
;
1807 if (!connmgr_has_controllers(mgr
)) {
1811 min_failure_duration
= INT_MAX
;
1812 HMAP_FOR_EACH (ofconn
, hmap_node
, &mgr
->controllers
) {
1813 int failure_duration
= rconn_failure_duration(ofconn
->rconn
);
1814 min_failure_duration
= MIN(min_failure_duration
, failure_duration
);
1816 return min_failure_duration
;
1819 /* Returns true if at least one primary controller is connected (regardless of
1820 * whether those controllers are believed to have authenticated and accepted
1821 * this switch), false if none of them are connected. */
1823 connmgr_is_any_controller_connected(const struct connmgr
*mgr
)
1825 const struct ofconn
*ofconn
;
1827 HMAP_FOR_EACH (ofconn
, hmap_node
, &mgr
->controllers
) {
1828 if (rconn_is_connected(ofconn
->rconn
)) {
1835 /* Returns true if at least one primary controller is believed to have
1836 * authenticated and accepted this switch, false otherwise. */
1838 connmgr_is_any_controller_admitted(const struct connmgr
*mgr
)
1840 const struct ofconn
*ofconn
;
1842 HMAP_FOR_EACH (ofconn
, hmap_node
, &mgr
->controllers
) {
1843 if (rconn_is_admitted(ofconn
->rconn
)) {
1850 /* In-band configuration. */
1852 static bool any_extras_changed(const struct connmgr
*,
1853 const struct sockaddr_in
*extras
, size_t n
);
1855 /* Sets the 'n' TCP port addresses in 'extras' as ones to which 'mgr''s
1856 * in-band control should guarantee access, in the same way that in-band
1857 * control guarantees access to OpenFlow controllers. */
1859 connmgr_set_extra_in_band_remotes(struct connmgr
*mgr
,
1860 const struct sockaddr_in
*extras
, size_t n
)
1862 if (!any_extras_changed(mgr
, extras
, n
)) {
1866 free(mgr
->extra_in_band_remotes
);
1867 mgr
->n_extra_remotes
= n
;
1868 mgr
->extra_in_band_remotes
= xmemdup(extras
, n
* sizeof *extras
);
1870 update_in_band_remotes(mgr
);
1873 /* Sets the OpenFlow queue used by flows set up by in-band control on
1874 * 'mgr' to 'queue_id'. If 'queue_id' is negative, then in-band control
1875 * flows will use the default queue. */
1877 connmgr_set_in_band_queue(struct connmgr
*mgr
, int queue_id
)
1879 if (queue_id
!= mgr
->in_band_queue
) {
1880 mgr
->in_band_queue
= queue_id
;
1881 update_in_band_remotes(mgr
);
1886 any_extras_changed(const struct connmgr
*mgr
,
1887 const struct sockaddr_in
*extras
, size_t n
)
1891 if (n
!= mgr
->n_extra_remotes
) {
1895 for (i
= 0; i
< n
; i
++) {
1896 const struct sockaddr_in
*old
= &mgr
->extra_in_band_remotes
[i
];
1897 const struct sockaddr_in
*new = &extras
[i
];
1899 if (old
->sin_addr
.s_addr
!= new->sin_addr
.s_addr
||
1900 old
->sin_port
!= new->sin_port
) {
1908 /* In-band implementation. */
1911 connmgr_has_in_band(struct connmgr
*mgr
)
1913 return mgr
->in_band
!= NULL
;
1916 /* Fail-open and in-band implementation. */
1918 /* Called by 'ofproto' after all flows have been flushed, to allow fail-open
1919 * and standalone mode to re-create their flows.
1921 * In-band control has more sophisticated code that manages flows itself. */
1923 connmgr_flushed(struct connmgr
*mgr
)
1924 OVS_EXCLUDED(ofproto_mutex
)
1926 if (mgr
->fail_open
) {
1927 fail_open_flushed(mgr
->fail_open
);
1930 /* If there are no controllers and we're in standalone mode, set up a flow
1931 * that matches every packet and directs them to OFPP_NORMAL (which goes to
1932 * us). Otherwise, the switch is in secure mode and we won't pass any
1933 * traffic until a controller has been defined and it tells us to do so. */
1934 if (!connmgr_has_controllers(mgr
)
1935 && mgr
->fail_mode
== OFPROTO_FAIL_STANDALONE
) {
1936 struct ofpbuf ofpacts
;
1939 ofpbuf_init(&ofpacts
, OFPACT_OUTPUT_SIZE
);
1940 ofpact_put_OUTPUT(&ofpacts
)->port
= OFPP_NORMAL
;
1941 ofpact_pad(&ofpacts
);
1943 match_init_catchall(&match
);
1944 ofproto_add_flow(mgr
->ofproto
, &match
, 0, ofpbuf_data(&ofpacts
),
1945 ofpbuf_size(&ofpacts
));
1947 ofpbuf_uninit(&ofpacts
);
1951 /* Creates a new ofservice for 'target' in 'mgr'. Returns 0 if successful,
1952 * otherwise a positive errno value.
1954 * ofservice_reconfigure() must be called to fully configure the new
1957 ofservice_create(struct connmgr
*mgr
, const char *target
,
1958 uint32_t allowed_versions
, uint8_t dscp
)
1960 struct ofservice
*ofservice
;
1961 struct pvconn
*pvconn
;
1964 error
= pvconn_open(target
, allowed_versions
, dscp
, &pvconn
);
1969 ofservice
= xzalloc(sizeof *ofservice
);
1970 hmap_insert(&mgr
->services
, &ofservice
->node
, hash_string(target
, 0));
1971 ofservice
->pvconn
= pvconn
;
1972 ofservice
->allowed_versions
= allowed_versions
;
1978 ofservice_destroy(struct connmgr
*mgr
, struct ofservice
*ofservice
)
1980 hmap_remove(&mgr
->services
, &ofservice
->node
);
1981 pvconn_close(ofservice
->pvconn
);
1986 ofservice_reconfigure(struct ofservice
*ofservice
,
1987 const struct ofproto_controller
*c
)
1989 ofservice
->probe_interval
= c
->probe_interval
;
1990 ofservice
->rate_limit
= c
->rate_limit
;
1991 ofservice
->burst_limit
= c
->burst_limit
;
1992 ofservice
->enable_async_msgs
= c
->enable_async_msgs
;
1993 ofservice
->dscp
= c
->dscp
;
1996 /* Finds and returns the ofservice within 'mgr' that has the given
1997 * 'target', or a null pointer if none exists. */
1998 static struct ofservice
*
1999 ofservice_lookup(struct connmgr
*mgr
, const char *target
)
2001 struct ofservice
*ofservice
;
2003 HMAP_FOR_EACH_WITH_HASH (ofservice
, node
, hash_string(target
, 0),
2005 if (!strcmp(pvconn_get_name(ofservice
->pvconn
), target
)) {
2012 /* Flow monitors (NXST_FLOW_MONITOR). */
2014 /* A counter incremented when something significant happens to an OpenFlow
2017 * - When a rule is added, its 'add_seqno' and 'modify_seqno' are set to
2018 * the current value (which is then incremented).
2020 * - When a rule is modified, its 'modify_seqno' is set to the current
2021 * value (which is then incremented).
2023 * Thus, by comparing an old value of monitor_seqno against a rule's
2024 * 'add_seqno', one can tell whether the rule was added before or after the old
2025 * value was read, and similarly for 'modify_seqno'.
2027 * 32 bits should normally be sufficient (and would be nice, to save space in
2028 * each rule) but then we'd have to have some special cases for wraparound.
2030 * We initialize monitor_seqno to 1 to allow 0 to be used as an invalid
2032 static uint64_t monitor_seqno
= 1;
2034 COVERAGE_DEFINE(ofmonitor_pause
);
2035 COVERAGE_DEFINE(ofmonitor_resume
);
2038 ofmonitor_create(const struct ofputil_flow_monitor_request
*request
,
2039 struct ofconn
*ofconn
, struct ofmonitor
**monitorp
)
2040 OVS_REQUIRES(ofproto_mutex
)
2042 struct ofmonitor
*m
;
2046 m
= ofmonitor_lookup(ofconn
, request
->id
);
2048 return OFPERR_OFPMOFC_MONITOR_EXISTS
;
2051 m
= xmalloc(sizeof *m
);
2053 hmap_insert(&ofconn
->monitors
, &m
->ofconn_node
, hash_int(request
->id
, 0));
2054 m
->id
= request
->id
;
2055 m
->flags
= request
->flags
;
2056 m
->out_port
= request
->out_port
;
2057 m
->table_id
= request
->table_id
;
2058 minimatch_init(&m
->match
, &request
->match
);
2065 ofmonitor_lookup(struct ofconn
*ofconn
, uint32_t id
)
2066 OVS_REQUIRES(ofproto_mutex
)
2068 struct ofmonitor
*m
;
2070 HMAP_FOR_EACH_IN_BUCKET (m
, ofconn_node
, hash_int(id
, 0),
2071 &ofconn
->monitors
) {
2080 ofmonitor_destroy(struct ofmonitor
*m
)
2081 OVS_REQUIRES(ofproto_mutex
)
2084 minimatch_destroy(&m
->match
);
2085 hmap_remove(&m
->ofconn
->monitors
, &m
->ofconn_node
);
2091 ofmonitor_report(struct connmgr
*mgr
, struct rule
*rule
,
2092 enum nx_flow_update_event event
,
2093 enum ofp_flow_removed_reason reason
,
2094 const struct ofconn
*abbrev_ofconn
, ovs_be32 abbrev_xid
,
2095 const struct rule_actions
*old_actions
)
2096 OVS_REQUIRES(ofproto_mutex
)
2098 enum nx_flow_monitor_flags update
;
2099 struct ofconn
*ofconn
;
2101 if (rule_is_hidden(rule
)) {
2108 rule
->add_seqno
= rule
->modify_seqno
= monitor_seqno
++;
2112 update
= NXFMF_DELETE
;
2115 case NXFME_MODIFIED
:
2116 update
= NXFMF_MODIFY
;
2117 rule
->modify_seqno
= monitor_seqno
++;
2125 LIST_FOR_EACH (ofconn
, node
, &mgr
->all_conns
) {
2126 enum nx_flow_monitor_flags flags
= 0;
2127 struct ofmonitor
*m
;
2129 if (ofconn
->monitor_paused
) {
2130 /* Only send NXFME_DELETED notifications for flows that were added
2131 * before we paused. */
2132 if (event
!= NXFME_DELETED
2133 || rule
->add_seqno
> ofconn
->monitor_paused
) {
2138 HMAP_FOR_EACH (m
, ofconn_node
, &ofconn
->monitors
) {
2139 if (m
->flags
& update
2140 && (m
->table_id
== 0xff || m
->table_id
== rule
->table_id
)
2141 && (ofproto_rule_has_out_port(rule
, m
->out_port
)
2143 && ofpacts_output_to_port(old_actions
->ofpacts
,
2144 old_actions
->ofpacts_len
,
2146 && cls_rule_is_loose_match(&rule
->cr
, &m
->match
)) {
2152 if (list_is_empty(&ofconn
->updates
)) {
2153 ofputil_start_flow_update(&ofconn
->updates
);
2154 ofconn
->sent_abbrev_update
= false;
2157 if (flags
& NXFMF_OWN
|| ofconn
!= abbrev_ofconn
2158 || ofconn
->monitor_paused
) {
2159 struct ofputil_flow_update fu
;
2163 fu
.reason
= event
== NXFME_DELETED
? reason
: 0;
2164 fu
.table_id
= rule
->table_id
;
2165 fu
.cookie
= rule
->flow_cookie
;
2166 minimatch_expand(&rule
->cr
.match
, &match
);
2168 fu
.priority
= rule
->cr
.priority
;
2170 ovs_mutex_lock(&rule
->mutex
);
2171 fu
.idle_timeout
= rule
->idle_timeout
;
2172 fu
.hard_timeout
= rule
->hard_timeout
;
2173 ovs_mutex_unlock(&rule
->mutex
);
2175 if (flags
& NXFMF_ACTIONS
) {
2176 const struct rule_actions
*actions
= rule_get_actions(rule
);
2177 fu
.ofpacts
= actions
->ofpacts
;
2178 fu
.ofpacts_len
= actions
->ofpacts_len
;
2183 ofputil_append_flow_update(&fu
, &ofconn
->updates
);
2184 } else if (!ofconn
->sent_abbrev_update
) {
2185 struct ofputil_flow_update fu
;
2187 fu
.event
= NXFME_ABBREV
;
2188 fu
.xid
= abbrev_xid
;
2189 ofputil_append_flow_update(&fu
, &ofconn
->updates
);
2191 ofconn
->sent_abbrev_update
= true;
2198 ofmonitor_flush(struct connmgr
*mgr
)
2199 OVS_REQUIRES(ofproto_mutex
)
2201 struct ofconn
*ofconn
;
2203 LIST_FOR_EACH (ofconn
, node
, &mgr
->all_conns
) {
2204 struct ofpbuf
*msg
, *next
;
2206 LIST_FOR_EACH_SAFE (msg
, next
, list_node
, &ofconn
->updates
) {
2207 unsigned int n_bytes
;
2209 list_remove(&msg
->list_node
);
2210 ofconn_send(ofconn
, msg
, ofconn
->monitor_counter
);
2211 n_bytes
= rconn_packet_counter_n_bytes(ofconn
->monitor_counter
);
2212 if (!ofconn
->monitor_paused
&& n_bytes
> 128 * 1024) {
2213 struct ofpbuf
*pause
;
2215 COVERAGE_INC(ofmonitor_pause
);
2216 ofconn
->monitor_paused
= monitor_seqno
++;
2217 pause
= ofpraw_alloc_xid(OFPRAW_NXT_FLOW_MONITOR_PAUSED
,
2218 OFP10_VERSION
, htonl(0), 0);
2219 ofconn_send(ofconn
, pause
, ofconn
->monitor_counter
);
2226 ofmonitor_resume(struct ofconn
*ofconn
)
2227 OVS_REQUIRES(ofproto_mutex
)
2229 struct rule_collection rules
;
2230 struct ofpbuf
*resumed
;
2231 struct ofmonitor
*m
;
2234 rule_collection_init(&rules
);
2235 HMAP_FOR_EACH (m
, ofconn_node
, &ofconn
->monitors
) {
2236 ofmonitor_collect_resume_rules(m
, ofconn
->monitor_paused
, &rules
);
2240 ofmonitor_compose_refresh_updates(&rules
, &msgs
);
2242 resumed
= ofpraw_alloc_xid(OFPRAW_NXT_FLOW_MONITOR_RESUMED
, OFP10_VERSION
,
2244 list_push_back(&msgs
, &resumed
->list_node
);
2245 ofconn_send_replies(ofconn
, &msgs
);
2247 ofconn
->monitor_paused
= 0;
2251 ofmonitor_may_resume(const struct ofconn
*ofconn
)
2252 OVS_REQUIRES(ofproto_mutex
)
2254 return (ofconn
->monitor_paused
!= 0
2255 && !rconn_packet_counter_n_packets(ofconn
->monitor_counter
));
2259 ofmonitor_run(struct connmgr
*mgr
)
2261 struct ofconn
*ofconn
;
2263 ovs_mutex_lock(&ofproto_mutex
);
2264 LIST_FOR_EACH (ofconn
, node
, &mgr
->all_conns
) {
2265 if (ofmonitor_may_resume(ofconn
)) {
2266 COVERAGE_INC(ofmonitor_resume
);
2267 ofmonitor_resume(ofconn
);
2270 ovs_mutex_unlock(&ofproto_mutex
);
2274 ofmonitor_wait(struct connmgr
*mgr
)
2276 struct ofconn
*ofconn
;
2278 ovs_mutex_lock(&ofproto_mutex
);
2279 LIST_FOR_EACH (ofconn
, node
, &mgr
->all_conns
) {
2280 if (ofmonitor_may_resume(ofconn
)) {
2281 poll_immediate_wake();
2284 ovs_mutex_unlock(&ofproto_mutex
);