2 * Copyright (c) 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2019 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.
24 #include "fail-open.h"
27 #include "ofproto-provider.h"
28 #include "openvswitch/dynamic-string.h"
29 #include "openvswitch/ofp-actions.h"
30 #include "openvswitch/ofp-msgs.h"
31 #include "openvswitch/ofp-monitor.h"
32 #include "openvswitch/ofpbuf.h"
33 #include "openvswitch/vconn.h"
34 #include "openvswitch/vlog.h"
35 #include "ovs-atomic.h"
37 #include "openvswitch/poll-loop.h"
38 #include "openvswitch/rconn.h"
39 #include "openvswitch/shash.h"
46 VLOG_DEFINE_THIS_MODULE(connmgr
);
47 static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(1, 5);
49 /* An OpenFlow connection.
55 * 'ofproto_mutex' must be held whenever an ofconn is created or destroyed or,
56 * more or less equivalently, whenever an ofconn is added to or removed from a
57 * connmgr. 'ofproto_mutex' doesn't protect the data inside the ofconn, except
58 * as specifically noted below. */
60 struct connmgr
*connmgr
; /* Connection's manager. */
61 struct ovs_list connmgr_node
; /* In connmgr->conns. */
63 struct ofservice
*ofservice
; /* Connection's service. */
64 struct ovs_list ofservice_node
; /* In service->conns. */
66 struct rconn
*rconn
; /* OpenFlow connection. */
67 enum ofconn_type type
; /* Type. */
68 enum ofproto_band band
; /* In-band or out-of-band? */
69 bool want_packet_in_on_miss
;
72 enum ofp12_controller_role role
; /* Role. */
73 enum ofputil_protocol protocol
; /* Current protocol variant. */
74 enum ofputil_packet_in_format packet_in_format
;
76 /* OFPT_PACKET_IN related data. */
77 int packet_in_queue_size
;
78 struct rconn_packet_counter
*packet_in_counter
; /* # queued on 'rconn'. */
79 #define N_SCHEDULERS 2
80 struct pinsched
*schedulers
[N_SCHEDULERS
];
81 int miss_send_len
; /* Bytes to send of buffered packets. */
82 uint16_t controller_id
; /* Connection controller ID. */
84 /* Number of OpenFlow messages queued on 'rconn' as replies to OpenFlow
85 * requests, and the maximum number before we stop reading OpenFlow
87 #define OFCONN_REPLY_MAX 100
88 struct rconn_packet_counter
*reply_counter
;
90 /* Asynchronous message configuration in each possible role.
92 * A 1-bit enables sending an asynchronous message for one possible reason
93 * that the message might be generated, a 0-bit disables it. */
94 struct ofputil_async_cfg
*async_cfg
;
96 /* Flow table operation logging. */
97 int n_add
, n_delete
, n_modify
; /* Number of unreported ops of each kind. */
98 long long int first_op
, last_op
; /* Range of times for unreported ops. */
99 long long int next_op_report
; /* Time to report ops, or LLONG_MAX. */
100 long long int op_backoff
; /* Earliest time to report ops again. */
102 /* Reassembly of multipart requests. */
103 struct hmap assembler
;
105 /* Flow monitors (e.g. NXST_FLOW_MONITOR). */
107 /* Configuration. Contains "struct ofmonitor"s. */
108 struct hmap monitors
OVS_GUARDED_BY(ofproto_mutex
);
112 * When too many flow monitor notifications back up in the transmit buffer,
113 * we pause the transmission of further notifications. These members track
114 * the flow control state.
116 * When notifications are flowing, 'monitor_paused' is 0. When
117 * notifications are paused, 'monitor_paused' is the value of
118 * 'monitor_seqno' at the point we paused.
120 * 'monitor_counter' counts the OpenFlow messages and bytes currently in
121 * flight. This value growing too large triggers pausing. */
122 uint64_t monitor_paused
OVS_GUARDED_BY(ofproto_mutex
);
123 struct rconn_packet_counter
*monitor_counter
OVS_GUARDED_BY(ofproto_mutex
);
125 /* State of monitors for a single ongoing flow_mod.
127 * 'updates' is a list of "struct ofpbuf"s that contain
128 * NXST_FLOW_MONITOR_REPLY messages representing the changes made by the
131 * When 'updates' is nonempty, 'sent_abbrev_update' is true if 'updates'
132 * contains an update event of type NXFME_ABBREV and false otherwise.. */
133 struct ovs_list updates
OVS_GUARDED_BY(ofproto_mutex
);
134 bool sent_abbrev_update
OVS_GUARDED_BY(ofproto_mutex
);
136 /* Active bundles. Contains "struct ofp_bundle"s. */
138 long long int next_bundle_expiry_check
;
141 /* vswitchd/ovs-vswitchd.8.in documents the value of BUNDLE_IDLE_LIFETIME in
142 * seconds. That documentation must be kept in sync with the value below. */
143 #define BUNDLE_EXPIRY_INTERVAL 1000 /* Check bundle expiry every 1 sec. */
144 #define BUNDLE_IDLE_TIMEOUT_DEFAULT 10000 /* Expire idle bundles after
147 static unsigned int bundle_idle_timeout
= BUNDLE_IDLE_TIMEOUT_DEFAULT
;
149 static void ofconn_create(struct ofservice
*, struct rconn
*,
150 const struct ofproto_controller
*settings
)
151 OVS_EXCLUDED(ofproto_mutex
);
152 static void ofconn_destroy(struct ofconn
*) OVS_REQUIRES(ofproto_mutex
);
154 static void ofconn_reconfigure(struct ofconn
*,
155 const struct ofproto_controller
*);
157 static void ofconn_run(struct ofconn
*,
158 void (*handle_openflow
)(struct ofconn
*,
159 const struct ovs_list
*msgs
));
160 static void ofconn_wait(struct ofconn
*);
162 static void ofconn_log_flow_mods(struct ofconn
*);
164 static char *ofconn_make_name(const struct connmgr
*, const char *target
);
166 static void ofconn_set_rate_limit(struct ofconn
*, int rate
, int burst
);
168 static void ofconn_send(const struct ofconn
*, struct ofpbuf
*,
169 struct rconn_packet_counter
*);
171 static void do_send_packet_ins(struct ofconn
*, struct ovs_list
*txq
);
173 /* A listener for incoming OpenFlow connections or for establishing an
174 * outgoing connection. */
176 struct hmap_node hmap_node
; /* In connmgr->services, by target. */
177 struct connmgr
*connmgr
;
179 char *target
; /* e.g. "tcp:..." or "pssl:...". */
180 struct ovs_list conns
; /* "ofconn"s generated by this service. */
181 enum ofconn_type type
; /* OFCONN_PRIMARY or OFCONN_SERVICE. */
183 /* Source of connections. */
184 struct rconn
*rconn
; /* Active connection only. */
185 struct pvconn
*pvconn
; /* Passive listener only. */
187 /* Settings for "struct ofconn"s established by this service. */
188 struct ofproto_controller s
;
191 static void ofservice_run(struct ofservice
*);
192 static void ofservice_wait(struct ofservice
*);
193 static int ofservice_reconfigure(struct ofservice
*,
194 const struct ofproto_controller
*)
195 OVS_REQUIRES(ofproto_mutex
);
196 static void ofservice_create(struct connmgr
*mgr
, const char *target
,
197 const struct ofproto_controller
*)
198 OVS_REQUIRES(ofproto_mutex
);
199 static void ofservice_destroy(struct ofservice
*) OVS_REQUIRES(ofproto_mutex
);
200 static struct ofservice
*ofservice_lookup(struct connmgr
*,
203 /* Connection manager for an OpenFlow switch. */
205 struct ofproto
*ofproto
;
207 char *local_port_name
;
209 /* OpenFlow connections.
211 * All modifications to 'conns' protected by ofproto_mutex, so that any
212 * traversals from other threads can be made safe by holding the
214 struct ovs_list conns
; /* All ofconns. */
215 uint64_t primary_election_id
; /* monotonically increasing sequence number
216 * for primary election */
217 bool primary_election_id_defined
;
219 /* OpenFlow connection establishment. */
220 struct hmap services
; /* Contains "struct ofservice"s. */
221 struct pvconn
**snoops
;
225 struct fail_open
*fail_open
;
226 enum ofproto_fail_mode fail_mode
;
228 /* In-band control. */
229 struct in_band
*in_band
;
230 struct sockaddr_in
*extra_in_band_remotes
;
231 size_t n_extra_remotes
;
234 ATOMIC(int) want_packet_in_on_miss
; /* Sum of ofconns' values. */
237 static void update_in_band_remotes(struct connmgr
*);
238 static void add_snooper(struct connmgr
*, struct vconn
*);
239 static void ofmonitor_run(struct connmgr
*);
240 static void ofmonitor_wait(struct connmgr
*);
242 /* Creates and returns a new connection manager owned by 'ofproto'. 'name' is
243 * a name for the ofproto suitable for using in log messages.
244 * 'local_port_name' is the name of the local port (OFPP_LOCAL) within
247 connmgr_create(struct ofproto
*ofproto
,
248 const char *name
, const char *local_port_name
)
250 struct connmgr
*mgr
= xmalloc(sizeof *mgr
);
251 mgr
->ofproto
= ofproto
;
252 mgr
->name
= xstrdup(name
);
253 mgr
->local_port_name
= xstrdup(local_port_name
);
255 ovs_list_init(&mgr
->conns
);
256 mgr
->primary_election_id
= 0;
257 mgr
->primary_election_id_defined
= false;
259 hmap_init(&mgr
->services
);
263 mgr
->fail_open
= NULL
;
264 mgr
->fail_mode
= OFPROTO_FAIL_SECURE
;
267 mgr
->extra_in_band_remotes
= NULL
;
268 mgr
->n_extra_remotes
= 0;
269 mgr
->in_band_queue
= -1;
271 atomic_init(&mgr
->want_packet_in_on_miss
, 0);
276 /* The default "table-miss" behaviour for OpenFlow1.3+ is to drop the
277 * packet rather than to send the packet to the controller.
279 * This function maintains the count of pre-OpenFlow1.3 with controller_id 0,
280 * as we assume these are the controllers that should receive "table-miss"
283 update_want_packet_in_on_miss(struct ofconn
*ofconn
)
285 /* We want a packet-in on miss when controller_id is zero and OpenFlow is
286 * lower than version 1.3. */
287 enum ofputil_protocol p
= ofconn
->protocol
;
288 int new_want
= (ofconn
->controller_id
== 0 &&
289 (p
== OFPUTIL_P_NONE
||
290 ofputil_protocol_to_ofp_version(p
) < OFP13_VERSION
));
292 /* Update the setting and the count if necessary. */
293 int old_want
= ofconn
->want_packet_in_on_miss
;
294 if (old_want
!= new_want
) {
295 atomic_int
*dst
= &ofconn
->connmgr
->want_packet_in_on_miss
;
297 atomic_read_relaxed(dst
, &count
);
298 atomic_store_relaxed(dst
, count
- old_want
+ new_want
);
300 ofconn
->want_packet_in_on_miss
= new_want
;
304 /* Frees 'mgr' and all of its resources. */
306 connmgr_destroy(struct connmgr
*mgr
)
307 OVS_REQUIRES(ofproto_mutex
)
313 struct ofservice
*ofservice
, *next_ofservice
;
314 HMAP_FOR_EACH_SAFE (ofservice
, next_ofservice
, hmap_node
, &mgr
->services
) {
315 ofservice_destroy(ofservice
);
317 hmap_destroy(&mgr
->services
);
318 ovs_assert(ovs_list_is_empty(&mgr
->conns
));
320 for (size_t i
= 0; i
< mgr
->n_snoops
; i
++) {
321 pvconn_close(mgr
->snoops
[i
]);
325 fail_open_destroy(mgr
->fail_open
);
326 mgr
->fail_open
= NULL
;
328 in_band_destroy(mgr
->in_band
);
330 free(mgr
->extra_in_band_remotes
);
332 free(mgr
->local_port_name
);
337 /* Does all of the periodic maintenance required by 'mgr'. Calls
338 * 'handle_openflow' for each message received on an OpenFlow connection,
339 * passing along the OpenFlow connection itself and the message that was sent.
340 * 'handle_openflow' must not modify or free the message. */
342 connmgr_run(struct connmgr
*mgr
,
343 void (*handle_openflow
)(struct ofconn
*,
344 const struct ovs_list
*msgs
))
345 OVS_EXCLUDED(ofproto_mutex
)
348 if (!in_band_run(mgr
->in_band
)) {
349 in_band_destroy(mgr
->in_band
);
354 struct ofconn
*ofconn
, *next_ofconn
;
355 LIST_FOR_EACH_SAFE (ofconn
, next_ofconn
, connmgr_node
, &mgr
->conns
) {
356 ofconn_run(ofconn
, handle_openflow
);
360 /* Fail-open maintenance. Do this after processing the ofconns since
361 * fail-open checks the status of the controller rconn. */
362 if (mgr
->fail_open
) {
363 fail_open_run(mgr
->fail_open
);
366 struct ofservice
*ofservice
;
367 HMAP_FOR_EACH (ofservice
, hmap_node
, &mgr
->services
) {
368 ofservice_run(ofservice
);
371 for (size_t i
= 0; i
< mgr
->n_snoops
; i
++) {
373 int retval
= pvconn_accept(mgr
->snoops
[i
], &vconn
);
375 add_snooper(mgr
, vconn
);
376 } else if (retval
!= EAGAIN
) {
377 VLOG_WARN_RL(&rl
, "accept failed (%s)", ovs_strerror(retval
));
382 /* Causes the poll loop to wake up when connmgr_run() needs to run. */
384 connmgr_wait(struct connmgr
*mgr
)
386 struct ofconn
*ofconn
;
387 LIST_FOR_EACH (ofconn
, connmgr_node
, &mgr
->conns
) {
394 in_band_wait(mgr
->in_band
);
397 if (mgr
->fail_open
) {
398 fail_open_wait(mgr
->fail_open
);
401 struct ofservice
*ofservice
;
402 HMAP_FOR_EACH (ofservice
, hmap_node
, &mgr
->services
) {
403 ofservice_wait(ofservice
);
406 for (size_t i
= 0; i
< mgr
->n_snoops
; i
++) {
407 pvconn_wait(mgr
->snoops
[i
]);
411 /* Adds some memory usage statistics for 'mgr' into 'usage', for use with
412 * memory_report(). */
414 connmgr_get_memory_usage(const struct connmgr
*mgr
, struct simap
*usage
)
416 unsigned int packets
= 0;
417 unsigned int ofconns
= 0;
419 struct ofconn
*ofconn
;
420 LIST_FOR_EACH (ofconn
, connmgr_node
, &mgr
->conns
) {
423 packets
+= rconn_count_txqlen(ofconn
->rconn
);
424 for (int i
= 0; i
< N_SCHEDULERS
; i
++) {
425 struct pinsched_stats stats
;
427 pinsched_get_stats(ofconn
->schedulers
[i
], &stats
);
428 packets
+= stats
.n_queued
;
431 simap_increase(usage
, "ofconns", ofconns
);
432 simap_increase(usage
, "packets", packets
);
435 /* Returns the ofproto that owns 'ofconn''s connmgr. */
437 ofconn_get_ofproto(const struct ofconn
*ofconn
)
439 return ofconn
->connmgr
->ofproto
;
442 /* Sets the bundle idle timeout to 'timeout' seconds, interpreting 0 as
443 * requesting the default timeout.
445 * The OpenFlow spec mandates the timeout to be at least one second; . */
447 connmgr_set_bundle_idle_timeout(unsigned timeout
)
449 bundle_idle_timeout
= (timeout
450 ? sat_mul(timeout
, 1000)
451 : BUNDLE_IDLE_TIMEOUT_DEFAULT
);
454 /* OpenFlow configuration. */
456 static void update_fail_open(struct connmgr
*) OVS_EXCLUDED(ofproto_mutex
);
457 static int set_pvconns(struct pvconn
***pvconnsp
, size_t *n_pvconnsp
,
458 const struct sset
*);
460 /* Returns true if 'mgr' has any configured primary controllers.
462 * Service controllers do not count, but configured primary controllers do
463 * count whether or not they are currently connected. */
465 connmgr_has_controllers(const struct connmgr
*mgr
)
467 struct ofservice
*ofservice
;
468 HMAP_FOR_EACH (ofservice
, hmap_node
, &mgr
->services
) {
469 if (ofservice
->type
== OFCONN_PRIMARY
) {
476 static struct ofconn
*
477 ofservice_first_conn(const struct ofservice
*ofservice
)
479 return (ovs_list_is_empty(&ofservice
->conns
)
481 : CONTAINER_OF(ofservice
->conns
.next
,
482 struct ofconn
, ofservice_node
));
485 /* Initializes 'info' and populates it with information about each configured
486 * primary controller. The keys in 'info' are the controllers' targets; the
487 * data values are corresponding "struct ofproto_controller_info".
489 * The caller owns 'info' and everything in it and should free it when it is no
492 connmgr_get_controller_info(struct connmgr
*mgr
, struct shash
*info
)
494 struct ofservice
*ofservice
;
495 HMAP_FOR_EACH (ofservice
, hmap_node
, &mgr
->services
) {
496 const struct rconn
*rconn
= ofservice
->rconn
;
500 const char *target
= rconn_get_target(rconn
);
502 if (!shash_find(info
, target
)) {
503 struct ofconn
*ofconn
= ofservice_first_conn(ofservice
);
504 struct ofproto_controller_info
*cinfo
= xmalloc(sizeof *cinfo
);
505 long long int now
= time_msec();
506 long long int last_connection
= rconn_get_last_connection(rconn
);
507 long long int last_disconnect
= rconn_get_last_disconnect(rconn
);
508 int last_error
= rconn_get_last_error(rconn
);
511 shash_add(info
, target
, cinfo
);
513 cinfo
->is_connected
= rconn_is_connected(rconn
);
514 cinfo
->role
= ofconn
? ofconn
->role
: OFPCR12_ROLE_NOCHANGE
;
516 smap_init(&cinfo
->pairs
);
518 smap_add(&cinfo
->pairs
, "last_error",
519 ovs_retval_to_string(last_error
));
522 smap_add(&cinfo
->pairs
, "state", rconn_get_state(rconn
));
524 if (last_connection
!= LLONG_MIN
) {
525 smap_add_format(&cinfo
->pairs
, "sec_since_connect",
526 "%lld", (now
- last_connection
) / 1000);
529 if (last_disconnect
!= LLONG_MIN
) {
530 smap_add_format(&cinfo
->pairs
, "sec_since_disconnect",
531 "%lld", (now
- last_disconnect
) / 1000);
534 for (i
= 0; i
< N_SCHEDULERS
; i
++) {
535 if (ofconn
&& ofconn
->schedulers
[i
]) {
536 const char *name
= i
? "miss" : "action";
537 struct pinsched_stats stats
;
539 pinsched_get_stats(ofconn
->schedulers
[i
], &stats
);
540 smap_add_nocopy(&cinfo
->pairs
,
541 xasprintf("packet-in-%s-backlog", name
),
542 xasprintf("%u", stats
.n_queued
));
543 smap_add_nocopy(&cinfo
->pairs
,
544 xasprintf("packet-in-%s-bypassed", name
),
545 xasprintf("%llu", stats
.n_normal
));
546 smap_add_nocopy(&cinfo
->pairs
,
547 xasprintf("packet-in-%s-queued", name
),
548 xasprintf("%llu", stats
.n_limited
));
549 smap_add_nocopy(&cinfo
->pairs
,
550 xasprintf("packet-in-%s-dropped", name
),
551 xasprintf("%llu", stats
.n_queue_dropped
));
559 connmgr_free_controller_info(struct shash
*info
)
561 struct shash_node
*node
;
563 SHASH_FOR_EACH (node
, info
) {
564 struct ofproto_controller_info
*cinfo
= node
->data
;
565 smap_destroy(&cinfo
->pairs
);
571 /* Changes 'mgr''s set of controllers to the 'n_controllers' controllers in
574 connmgr_set_controllers(struct connmgr
*mgr
, struct shash
*controllers
)
575 OVS_EXCLUDED(ofproto_mutex
)
577 bool had_controllers
= connmgr_has_controllers(mgr
);
579 /* Required to add and remove ofconns. This could probably be narrowed to
580 * cover a smaller amount of code, if that yielded some benefit. */
581 ovs_mutex_lock(&ofproto_mutex
);
583 /* Create newly configured services. */
584 struct shash_node
*node
;
585 SHASH_FOR_EACH (node
, controllers
) {
586 const char *target
= node
->name
;
587 const struct ofproto_controller
*c
= node
->data
;
588 if (!ofservice_lookup(mgr
, target
)) {
589 ofservice_create(mgr
, target
, c
);
593 /* Delete services that are no longer configured.
594 * Update configuration of all now-existing services. */
595 struct ofservice
*ofservice
, *next_ofservice
;
596 HMAP_FOR_EACH_SAFE (ofservice
, next_ofservice
, hmap_node
, &mgr
->services
) {
597 const char *target
= ofservice
->target
;
598 struct ofproto_controller
*c
= shash_find_data(controllers
, target
);
600 VLOG_INFO("%s: removed %s controller \"%s\"",
601 mgr
->name
, ofconn_type_to_string(ofservice
->type
),
603 ofservice_destroy(ofservice
);
605 if (ofservice_reconfigure(ofservice
, c
)) {
606 char *target_to_restore
= xstrdup(target
);
607 VLOG_INFO("%s: Changes to controller \"%s\" "
608 "expects re-initialization: Re-initializing now.",
610 ofservice_destroy(ofservice
);
611 ofservice_create(mgr
, target_to_restore
, c
);
612 free(target_to_restore
);
617 ovs_mutex_unlock(&ofproto_mutex
);
619 update_in_band_remotes(mgr
);
620 update_fail_open(mgr
);
621 if (had_controllers
!= connmgr_has_controllers(mgr
)) {
622 ofproto_flush_flows(mgr
->ofproto
);
626 /* Drops the connections between 'mgr' and all of its primary and secondary
627 * controllers, forcing them to reconnect. */
629 connmgr_reconnect(const struct connmgr
*mgr
)
631 struct ofconn
*ofconn
;
633 LIST_FOR_EACH (ofconn
, connmgr_node
, &mgr
->conns
) {
634 rconn_reconnect(ofconn
->rconn
);
638 /* Sets the "snoops" for 'mgr' to the pvconn targets listed in 'snoops'.
640 * A "snoop" is a pvconn to which every OpenFlow message to or from the most
641 * important controller on 'mgr' is mirrored. */
643 connmgr_set_snoops(struct connmgr
*mgr
, const struct sset
*snoops
)
645 return set_pvconns(&mgr
->snoops
, &mgr
->n_snoops
, snoops
);
648 /* Adds each of the snoops currently configured on 'mgr' to 'snoops'. */
650 connmgr_get_snoops(const struct connmgr
*mgr
, struct sset
*snoops
)
652 for (size_t i
= 0; i
< mgr
->n_snoops
; i
++) {
653 sset_add(snoops
, pvconn_get_name(mgr
->snoops
[i
]));
657 /* Returns true if 'mgr' has at least one snoop, false if it has none. */
659 connmgr_has_snoops(const struct connmgr
*mgr
)
661 return mgr
->n_snoops
> 0;
665 update_in_band_remotes(struct connmgr
*mgr
)
667 /* Allocate enough memory for as many remotes as we could possibly have. */
668 size_t max_addrs
= mgr
->n_extra_remotes
+ hmap_count(&mgr
->services
);
669 struct sockaddr_in
*addrs
= xmalloc(max_addrs
* sizeof *addrs
);
672 /* Add all the remotes. */
673 struct ofservice
*ofservice
;
674 HMAP_FOR_EACH (ofservice
, hmap_node
, &mgr
->services
) {
675 const char *target
= ofservice
->target
;
677 struct sockaddr_storage ss
;
678 struct sockaddr_in in
;
681 if (ofservice
->s
.band
== OFPROTO_IN_BAND
682 && stream_parse_target_with_default_port(target
, OFP_PORT
, &sa
.ss
)
683 && sa
.ss
.ss_family
== AF_INET
) {
684 addrs
[n_addrs
++] = sa
.in
;
687 for (size_t i
= 0; i
< mgr
->n_extra_remotes
; i
++) {
688 addrs
[n_addrs
++] = mgr
->extra_in_band_remotes
[i
];
691 /* Create or update or destroy in-band. */
694 in_band_create(mgr
->ofproto
, mgr
->local_port_name
, &mgr
->in_band
);
697 /* in_band_run() needs a chance to delete any existing in-band flows.
698 * We will destroy mgr->in_band after it's done with that. */
701 in_band_set_queue(mgr
->in_band
, mgr
->in_band_queue
);
702 in_band_set_remotes(mgr
->in_band
, addrs
, n_addrs
);
710 update_fail_open(struct connmgr
*mgr
)
711 OVS_EXCLUDED(ofproto_mutex
)
713 if (connmgr_has_controllers(mgr
)
714 && mgr
->fail_mode
== OFPROTO_FAIL_STANDALONE
) {
715 if (!mgr
->fail_open
) {
716 mgr
->fail_open
= fail_open_create(mgr
->ofproto
, mgr
);
719 ovs_mutex_lock(&ofproto_mutex
);
720 fail_open_destroy(mgr
->fail_open
);
721 ovs_mutex_unlock(&ofproto_mutex
);
722 mgr
->fail_open
= NULL
;
727 set_pvconns(struct pvconn
***pvconnsp
, size_t *n_pvconnsp
,
728 const struct sset
*sset
)
730 /* Free the old pvconns. */
731 struct pvconn
**old_pvconns
= *pvconnsp
;
732 size_t old_n_pvconns
= *n_pvconnsp
;
733 for (size_t i
= 0; i
< old_n_pvconns
; i
++) {
734 pvconn_close(old_pvconns
[i
]);
738 /* Populate the new pvconns. */
739 struct pvconn
**new_pvconns
= xmalloc(sset_count(sset
)
740 * sizeof *new_pvconns
);
741 size_t new_n_pvconns
= 0;
745 SSET_FOR_EACH (name
, sset
) {
746 struct pvconn
*pvconn
;
747 int error
= pvconn_open(name
, 0, 0, &pvconn
);
749 new_pvconns
[new_n_pvconns
++] = pvconn
;
751 VLOG_ERR("failed to listen on %s: %s", name
, ovs_strerror(error
));
758 *pvconnsp
= new_pvconns
;
759 *n_pvconnsp
= new_n_pvconns
;
764 /* Returns a "preference level" for snooping 'ofconn'. A higher return value
765 * means that 'ofconn' is more interesting for monitoring than a lower return
768 snoop_preference(const struct ofservice
*ofservice
)
770 struct ofconn
*ofconn
= ofservice_first_conn(ofservice
);
775 switch (ofconn
->role
) {
776 case OFPCR12_ROLE_PRIMARY
:
778 case OFPCR12_ROLE_EQUAL
:
780 case OFPCR12_ROLE_SECONDARY
:
782 case OFPCR12_ROLE_NOCHANGE
:
784 /* Shouldn't happen. */
789 /* One of 'mgr''s "snoop" pvconns has accepted a new connection on 'vconn'.
790 * Connects this vconn to a controller. */
792 add_snooper(struct connmgr
*mgr
, struct vconn
*vconn
)
794 /* Pick a controller for monitoring. */
795 struct ofservice
*best
= NULL
;
796 struct ofservice
*ofservice
;
797 HMAP_FOR_EACH (ofservice
, hmap_node
, &mgr
->services
) {
798 if (ofservice
->rconn
&&
799 (!best
|| snoop_preference(ofservice
) > snoop_preference(best
))) {
805 rconn_add_monitor(best
->rconn
, vconn
);
807 VLOG_INFO_RL(&rl
, "no controller connection to snoop");
812 /* Public ofconn functions. */
814 /* Returns the connection type, either OFCONN_PRIMARY or OFCONN_SERVICE. */
816 ofconn_get_type(const struct ofconn
*ofconn
)
821 /* If a primary election id is defined, stores it into '*idp' and returns
822 * true. Otherwise, stores UINT64_MAX into '*idp' and returns false. */
824 ofconn_get_primary_election_id(const struct ofconn
*ofconn
, uint64_t *idp
)
826 *idp
= (ofconn
->connmgr
->primary_election_id_defined
827 ? ofconn
->connmgr
->primary_election_id
829 return ofconn
->connmgr
->primary_election_id_defined
;
832 /* Sets the primary election id.
834 * Returns true if successful, false if the id is stale
837 ofconn_set_primary_election_id(struct ofconn
*ofconn
, uint64_t id
)
839 if (ofconn
->connmgr
->primary_election_id_defined
841 /* Unsigned difference interpreted as a two's complement signed
843 (int64_t)(id
- ofconn
->connmgr
->primary_election_id
) < 0) {
846 ofconn
->connmgr
->primary_election_id
= id
;
847 ofconn
->connmgr
->primary_election_id_defined
= true;
852 /* Returns the role configured for 'ofconn'.
854 * The default role, if no other role has been set, is OFPCR12_ROLE_EQUAL. */
855 enum ofp12_controller_role
856 ofconn_get_role(const struct ofconn
*ofconn
)
862 ofconn_send_role_status(struct ofconn
*ofconn
, uint32_t role
, uint8_t reason
)
864 struct ofputil_role_status status
;
865 status
.reason
= reason
;
867 ofconn_get_primary_election_id(ofconn
, &status
.generation_id
);
870 = ofputil_encode_role_status(&status
, ofconn_get_protocol(ofconn
));
872 ofconn_send(ofconn
, buf
, NULL
);
876 /* Changes 'ofconn''s role to 'role'. If 'role' is OFPCR12_ROLE_PRIMARY then
877 * any existing primary is demoted to a secondary. */
879 ofconn_set_role(struct ofconn
*ofconn
, enum ofp12_controller_role role
)
881 if (role
!= ofconn
->role
&& role
== OFPCR12_ROLE_PRIMARY
) {
882 struct ofconn
*other
;
884 LIST_FOR_EACH (other
, connmgr_node
, &ofconn
->connmgr
->conns
) {
885 if (other
->role
== OFPCR12_ROLE_PRIMARY
) {
886 other
->role
= OFPCR12_ROLE_SECONDARY
;
887 ofconn_send_role_status(other
, OFPCR12_ROLE_SECONDARY
,
888 OFPCRR_PRIMARY_REQUEST
);
896 ofconn_set_invalid_ttl_to_controller(struct ofconn
*ofconn
, bool enable
)
898 struct ofputil_async_cfg ac
= ofconn_get_async_config(ofconn
);
899 uint32_t bit
= 1u << OFPR_INVALID_TTL
;
901 ac
.primary
[OAM_PACKET_IN
] |= bit
;
903 ac
.primary
[OAM_PACKET_IN
] &= ~bit
;
905 ofconn_set_async_config(ofconn
, &ac
);
909 ofconn_get_invalid_ttl_to_controller(struct ofconn
*ofconn
)
911 struct ofputil_async_cfg ac
= ofconn_get_async_config(ofconn
);
912 uint32_t bit
= 1u << OFPR_INVALID_TTL
;
913 return (ac
.primary
[OAM_PACKET_IN
] & bit
) != 0;
916 /* Returns the currently configured protocol for 'ofconn', one of OFPUTIL_P_*.
918 * Returns OFPUTIL_P_NONE, which is not a valid protocol, if 'ofconn' hasn't
919 * completed version negotiation. This can't happen if at least one OpenFlow
920 * message, other than OFPT_HELLO, has been received on the connection (such as
921 * in ofproto.c's message handling code), since version negotiation is a
922 * prerequisite for starting to receive messages. This means that
923 * OFPUTIL_P_NONE is a special case that most callers need not worry about. */
924 enum ofputil_protocol
925 ofconn_get_protocol(const struct ofconn
*ofconn
)
927 if (ofconn
->protocol
== OFPUTIL_P_NONE
&&
928 rconn_is_connected(ofconn
->rconn
)) {
929 int version
= rconn_get_version(ofconn
->rconn
);
931 ofconn_set_protocol(CONST_CAST(struct ofconn
*, ofconn
),
932 ofputil_protocol_from_ofp_version(version
));
936 return ofconn
->protocol
;
939 /* Sets the protocol for 'ofconn' to 'protocol' (one of OFPUTIL_P_*).
941 * (This doesn't actually send anything to accomplish this. Presumably the
942 * caller already did that.) */
944 ofconn_set_protocol(struct ofconn
*ofconn
, enum ofputil_protocol protocol
)
946 ofconn
->protocol
= protocol
;
947 update_want_packet_in_on_miss(ofconn
);
950 /* Returns the currently configured packet in format for 'ofconn', one of
953 * The default, if no other format has been set, is NXPIF_STANDARD. */
954 enum ofputil_packet_in_format
955 ofconn_get_packet_in_format(struct ofconn
*ofconn
)
957 return ofconn
->packet_in_format
;
960 /* Sets the packet in format for 'ofconn' to 'packet_in_format' (one of
963 ofconn_set_packet_in_format(struct ofconn
*ofconn
,
964 enum ofputil_packet_in_format packet_in_format
)
966 ofconn
->packet_in_format
= packet_in_format
;
969 /* Sets the controller connection ID for 'ofconn' to 'controller_id'.
971 * The connection controller ID is used for OFPP_CONTROLLER and
972 * NXAST_CONTROLLER actions. See "struct nx_action_controller" for details. */
974 ofconn_set_controller_id(struct ofconn
*ofconn
, uint16_t controller_id
)
976 ofconn
->controller_id
= controller_id
;
977 update_want_packet_in_on_miss(ofconn
);
980 /* Returns the default miss send length for 'ofconn'. */
982 ofconn_get_miss_send_len(const struct ofconn
*ofconn
)
984 return ofconn
->miss_send_len
;
987 /* Sets the default miss send length for 'ofconn' to 'miss_send_len'. */
989 ofconn_set_miss_send_len(struct ofconn
*ofconn
, int miss_send_len
)
991 ofconn
->miss_send_len
= miss_send_len
;
995 ofconn_set_async_config(struct ofconn
*ofconn
,
996 const struct ofputil_async_cfg
*ac
)
998 if (!ofconn
->async_cfg
) {
999 ofconn
->async_cfg
= xmalloc(sizeof *ofconn
->async_cfg
);
1001 *ofconn
->async_cfg
= *ac
;
1003 if (ofputil_protocol_to_ofp_version(ofconn_get_protocol(ofconn
))
1005 if (ofconn
->async_cfg
->primary
[OAM_PACKET_IN
] & (1u << OFPR_ACTION
)) {
1006 ofconn
->async_cfg
->primary
[OAM_PACKET_IN
] |= OFPR14_ACTION_BITS
;
1008 if (ofconn
->async_cfg
->secondary
[OAM_PACKET_IN
] & (1u << OFPR_ACTION
)) {
1009 ofconn
->async_cfg
->secondary
[OAM_PACKET_IN
] |= OFPR14_ACTION_BITS
;
1014 struct ofputil_async_cfg
1015 ofconn_get_async_config(const struct ofconn
*ofconn
)
1017 if (ofconn
->async_cfg
) {
1018 return *ofconn
->async_cfg
;
1021 int version
= rconn_get_version(ofconn
->rconn
);
1022 return (version
< 0 || !ofconn
->ofservice
->s
.enable_async_msgs
1023 ? OFPUTIL_ASYNC_CFG_INIT
1024 : ofputil_async_cfg_default(version
));
1027 /* Sends 'msg' on 'ofconn', accounting it as a reply. (If there is a
1028 * sufficient number of OpenFlow replies in-flight on a single ofconn, then the
1029 * connmgr will stop accepting new OpenFlow requests on that ofconn until the
1030 * controller has accepted some of the replies.) */
1032 ofconn_send_reply(const struct ofconn
*ofconn
, struct ofpbuf
*msg
)
1034 ofconn_send(ofconn
, msg
, ofconn
->reply_counter
);
1037 /* Sends each of the messages in list 'replies' on 'ofconn' in order,
1038 * accounting them as replies. */
1040 ofconn_send_replies(const struct ofconn
*ofconn
, struct ovs_list
*replies
)
1042 struct ofpbuf
*reply
;
1044 LIST_FOR_EACH_POP (reply
, list_node
, replies
) {
1045 ofconn_send_reply(ofconn
, reply
);
1049 /* Sends 'error' on 'ofconn', as a reply to 'request'. */
1051 ofconn_send_error(const struct ofconn
*ofconn
,
1052 const struct ofp_header
*request
, enum ofperr error
)
1054 static struct vlog_rate_limit err_rl
= VLOG_RATE_LIMIT_INIT(10, 10);
1055 struct ofpbuf
*reply
= ofperr_encode_reply(error
, request
);
1056 if (!VLOG_DROP_INFO(&err_rl
)) {
1057 size_t request_len
= ntohs(request
->length
);
1060 const char *type_name
= (!ofpraw_decode_partial(&raw
, request
,
1061 MIN(64, request_len
))
1062 ? ofpraw_get_name(raw
)
1065 VLOG_INFO("%s: sending %s error reply to %s message",
1066 rconn_get_name(ofconn
->rconn
), ofperr_to_string(error
),
1069 ofconn_send_reply(ofconn
, reply
);
1072 /* Reports that a flow_mod operation of the type specified by 'command' was
1073 * successfully executed by 'ofconn', so that the connmgr can log it. */
1075 ofconn_report_flow_mod(struct ofconn
*ofconn
,
1076 enum ofp_flow_mod_command command
)
1084 case OFPFC_MODIFY_STRICT
:
1089 case OFPFC_DELETE_STRICT
:
1094 long long int now
= time_msec();
1095 if (ofconn
->next_op_report
== LLONG_MAX
) {
1096 ofconn
->first_op
= now
;
1097 ofconn
->next_op_report
= MAX(now
+ 10 * 1000, ofconn
->op_backoff
);
1098 ofconn
->op_backoff
= ofconn
->next_op_report
+ 60 * 1000;
1100 ofconn
->last_op
= now
;
1103 /* OpenFlow 1.4 bundles. */
1105 static inline uint32_t
1106 bundle_hash(uint32_t id
)
1108 return hash_int(id
, 0);
1112 ofconn_get_bundle(struct ofconn
*ofconn
, uint32_t id
)
1114 struct ofp_bundle
*bundle
;
1116 HMAP_FOR_EACH_IN_BUCKET(bundle
, node
, bundle_hash(id
), &ofconn
->bundles
) {
1117 if (bundle
->id
== id
) {
1126 ofconn_insert_bundle(struct ofconn
*ofconn
, struct ofp_bundle
*bundle
)
1128 hmap_insert(&ofconn
->bundles
, &bundle
->node
, bundle_hash(bundle
->id
));
1132 ofconn_remove_bundle(struct ofconn
*ofconn
, struct ofp_bundle
*bundle
)
1134 hmap_remove(&ofconn
->bundles
, &bundle
->node
);
1138 bundle_remove_all(struct ofconn
*ofconn
)
1140 struct ofp_bundle
*b
, *next
;
1142 HMAP_FOR_EACH_SAFE (b
, next
, node
, &ofconn
->bundles
) {
1143 ofp_bundle_remove__(ofconn
, b
);
1148 bundle_remove_expired(struct ofconn
*ofconn
, long long int now
)
1150 long long int limit
= now
- bundle_idle_timeout
;
1152 struct ofp_bundle
*b
, *next
;
1153 HMAP_FOR_EACH_SAFE (b
, next
, node
, &ofconn
->bundles
) {
1154 if (b
->used
<= limit
) {
1155 ofconn_send_error(ofconn
, b
->msg
, OFPERR_OFPBFC_TIMEOUT
);
1156 ofp_bundle_remove__(ofconn
, b
);
1161 /* Private ofconn functions. */
1164 ofconn_create(struct ofservice
*ofservice
, struct rconn
*rconn
,
1165 const struct ofproto_controller
*settings
)
1166 OVS_EXCLUDED(ofproto_mutex
)
1168 ovs_mutex_lock(&ofproto_mutex
);
1170 struct ofconn
*ofconn
= xzalloc(sizeof *ofconn
);
1172 ofconn
->connmgr
= ofservice
->connmgr
;
1173 ovs_list_push_back(&ofservice
->connmgr
->conns
, &ofconn
->connmgr_node
);
1175 hmap_init(&ofconn
->assembler
);
1177 ofconn
->ofservice
= ofservice
;
1178 ovs_list_push_back(&ofservice
->conns
, &ofconn
->ofservice_node
);
1180 ofconn
->rconn
= rconn
;
1181 ofconn
->type
= settings
->type
;
1182 ofconn
->band
= settings
->band
;
1184 ofconn
->role
= OFPCR12_ROLE_EQUAL
;
1185 ofconn_set_protocol(ofconn
, OFPUTIL_P_NONE
);
1186 ofconn
->packet_in_format
= OFPUTIL_PACKET_IN_STD
;
1188 ofconn
->packet_in_queue_size
= settings
->max_pktq_size
;
1189 ofconn
->packet_in_counter
= rconn_packet_counter_create();
1190 ofconn
->miss_send_len
= (ofconn
->type
== OFCONN_PRIMARY
1191 ? OFP_DEFAULT_MISS_SEND_LEN
1193 ofconn
->controller_id
= 0;
1195 ofconn
->reply_counter
= rconn_packet_counter_create();
1197 ofconn
->async_cfg
= NULL
;
1199 ofconn
->n_add
= ofconn
->n_delete
= ofconn
->n_modify
= 0;
1200 ofconn
->first_op
= ofconn
->last_op
= LLONG_MIN
;
1201 ofconn
->next_op_report
= LLONG_MAX
;
1202 ofconn
->op_backoff
= LLONG_MIN
;
1204 hmap_init(&ofconn
->monitors
);
1205 ofconn
->monitor_counter
= rconn_packet_counter_create();
1207 ovs_list_init(&ofconn
->updates
);
1209 hmap_init(&ofconn
->bundles
);
1210 ofconn
->next_bundle_expiry_check
= time_msec() + BUNDLE_EXPIRY_INTERVAL
;
1212 ofconn_set_rate_limit(ofconn
, settings
->rate_limit
, settings
->burst_limit
);
1214 ovs_mutex_unlock(&ofproto_mutex
);
1218 ofconn_destroy(struct ofconn
*ofconn
)
1219 OVS_REQUIRES(ofproto_mutex
)
1225 ofconn_log_flow_mods(ofconn
);
1227 ovs_list_remove(&ofconn
->connmgr_node
);
1228 ovs_list_remove(&ofconn
->ofservice_node
);
1230 if (ofconn
->rconn
!= ofconn
->ofservice
->rconn
) {
1231 rconn_destroy(ofconn
->rconn
);
1234 /* Force clearing of want_packet_in_on_miss to keep the global count
1236 ofconn
->controller_id
= 1;
1237 update_want_packet_in_on_miss(ofconn
);
1239 rconn_packet_counter_destroy(ofconn
->packet_in_counter
);
1240 for (int i
= 0; i
< N_SCHEDULERS
; i
++) {
1241 if (ofconn
->schedulers
[i
]) {
1242 pinsched_destroy(ofconn
->schedulers
[i
]);
1246 rconn_packet_counter_destroy(ofconn
->reply_counter
);
1248 free(ofconn
->async_cfg
);
1250 struct ofmonitor
*monitor
, *next_monitor
;
1251 HMAP_FOR_EACH_SAFE (monitor
, next_monitor
, ofconn_node
,
1252 &ofconn
->monitors
) {
1253 ofmonitor_destroy(monitor
);
1255 hmap_destroy(&ofconn
->monitors
);
1256 rconn_packet_counter_destroy(ofconn
->monitor_counter
);
1258 ofpbuf_list_delete(&ofconn
->updates
); /* ...but it should be empty. */
1260 bundle_remove_all(ofconn
);
1261 hmap_destroy(&ofconn
->bundles
);
1266 /* Reconfigures 'ofconn' to match 'c'. */
1268 ofconn_reconfigure(struct ofconn
*ofconn
, const struct ofproto_controller
*c
)
1270 rconn_set_max_backoff(ofconn
->rconn
, c
->max_backoff
);
1272 int probe_interval
= c
->probe_interval
? MAX(c
->probe_interval
, 5) : 0;
1273 rconn_set_probe_interval(ofconn
->rconn
, probe_interval
);
1275 ofconn
->band
= c
->band
;
1276 ofconn
->packet_in_queue_size
= c
->max_pktq_size
;
1278 ofconn_set_rate_limit(ofconn
, c
->rate_limit
, c
->burst_limit
);
1280 if (c
->dscp
!= rconn_get_dscp(ofconn
->rconn
)) {
1281 rconn_set_dscp(ofconn
->rconn
, c
->dscp
);
1282 rconn_reconnect(ofconn
->rconn
);
1286 /* Returns true if it makes sense for 'ofconn' to receive and process OpenFlow
1289 ofconn_may_recv(const struct ofconn
*ofconn
)
1291 int count
= rconn_packet_counter_n_packets(ofconn
->reply_counter
);
1292 return count
< OFCONN_REPLY_MAX
;
1296 ofconn_run(struct ofconn
*ofconn
,
1297 void (*handle_openflow
)(struct ofconn
*,
1298 const struct ovs_list
*msgs
))
1300 struct connmgr
*mgr
= ofconn
->connmgr
;
1302 for (size_t i
= 0; i
< N_SCHEDULERS
; i
++) {
1303 struct ovs_list txq
;
1305 pinsched_run(ofconn
->schedulers
[i
], &txq
);
1306 do_send_packet_ins(ofconn
, &txq
);
1309 rconn_run(ofconn
->rconn
);
1311 /* Limit the number of iterations to avoid starving other tasks. */
1312 for (int i
= 0; i
< 50 && ofconn_may_recv(ofconn
); i
++) {
1313 struct ofpbuf
*of_msg
= rconn_recv(ofconn
->rconn
);
1318 if (mgr
->fail_open
) {
1319 fail_open_maybe_recover(mgr
->fail_open
);
1322 struct ovs_list msgs
;
1323 enum ofperr error
= ofpmp_assembler_execute(&ofconn
->assembler
, of_msg
,
1324 &msgs
, time_msec());
1326 ofconn_send_error(ofconn
, of_msg
->data
, error
);
1327 ofpbuf_delete(of_msg
);
1328 } else if (!ovs_list_is_empty(&msgs
)) {
1329 handle_openflow(ofconn
, &msgs
);
1330 ofpbuf_list_delete(&msgs
);
1334 long long int now
= time_msec();
1336 if (now
>= ofconn
->next_bundle_expiry_check
) {
1337 ofconn
->next_bundle_expiry_check
= now
+ BUNDLE_EXPIRY_INTERVAL
;
1338 bundle_remove_expired(ofconn
, now
);
1341 if (now
>= ofconn
->next_op_report
) {
1342 ofconn_log_flow_mods(ofconn
);
1345 struct ofpbuf
*error
= ofpmp_assembler_run(&ofconn
->assembler
,
1348 ofconn_send(ofconn
, error
, NULL
);
1351 ovs_mutex_lock(&ofproto_mutex
);
1352 if (rconn_is_reliable(ofconn
->rconn
)
1353 ? !rconn_is_connected(ofconn
->rconn
)
1354 : !rconn_is_alive(ofconn
->rconn
)) {
1355 ofconn_destroy(ofconn
);
1357 ovs_mutex_unlock(&ofproto_mutex
);
1361 ofconn_wait(struct ofconn
*ofconn
)
1363 for (int i
= 0; i
< N_SCHEDULERS
; i
++) {
1364 pinsched_wait(ofconn
->schedulers
[i
]);
1366 rconn_run_wait(ofconn
->rconn
);
1367 if (ofconn_may_recv(ofconn
)) {
1368 rconn_recv_wait(ofconn
->rconn
);
1370 if (ofconn
->next_op_report
!= LLONG_MAX
) {
1371 poll_timer_wait_until(ofconn
->next_op_report
);
1373 poll_timer_wait_until(ofpmp_assembler_wait(&ofconn
->assembler
));
1377 ofconn_log_flow_mods(struct ofconn
*ofconn
)
1379 int n_flow_mods
= ofconn
->n_add
+ ofconn
->n_delete
+ ofconn
->n_modify
;
1381 long long int ago
= (time_msec() - ofconn
->first_op
) / 1000;
1382 long long int interval
= (ofconn
->last_op
- ofconn
->first_op
) / 1000;
1386 ds_put_format(&s
, "%d flow_mods ", n_flow_mods
);
1387 if (interval
== ago
) {
1388 ds_put_format(&s
, "in the last %lld s", ago
);
1389 } else if (interval
) {
1390 ds_put_format(&s
, "in the %lld s starting %lld s ago",
1393 ds_put_format(&s
, "%lld s ago", ago
);
1396 ds_put_cstr(&s
, " (");
1397 if (ofconn
->n_add
) {
1398 ds_put_format(&s
, "%d adds, ", ofconn
->n_add
);
1400 if (ofconn
->n_delete
) {
1401 ds_put_format(&s
, "%d deletes, ", ofconn
->n_delete
);
1403 if (ofconn
->n_modify
) {
1404 ds_put_format(&s
, "%d modifications, ", ofconn
->n_modify
);
1407 ds_put_char(&s
, ')');
1409 VLOG_INFO("%s: %s", rconn_get_name(ofconn
->rconn
), ds_cstr(&s
));
1412 ofconn
->n_add
= ofconn
->n_delete
= ofconn
->n_modify
= 0;
1414 ofconn
->next_op_report
= LLONG_MAX
;
1417 /* Returns true if 'ofconn' should receive asynchronous messages of the given
1418 * OAM_* 'type' and 'reason', which should be a OFPR_* value for OAM_PACKET_IN,
1419 * a OFPPR_* value for OAM_PORT_STATUS, or an OFPRR_* value for
1420 * OAM_FLOW_REMOVED. Returns false if the message should not be sent on
1423 ofconn_receives_async_msg(const struct ofconn
*ofconn
,
1424 enum ofputil_async_msg_type type
,
1425 unsigned int reason
)
1427 ovs_assert(reason
< 32);
1428 ovs_assert((unsigned int) type
< OAM_N_TYPES
);
1430 if (!rconn_is_connected(ofconn
->rconn
) || !ofconn_get_protocol(ofconn
)) {
1434 /* Keep the following code in sync with the documentation in the
1435 * "Asynchronous Messages" section in 'topics/design' */
1437 if (ofconn
->type
== OFCONN_SERVICE
&& !ofconn
->miss_send_len
) {
1438 /* Service connections don't get asynchronous messages unless they have
1439 * explicitly asked for them by setting a nonzero miss send length. */
1443 struct ofputil_async_cfg ac
= ofconn_get_async_config(ofconn
);
1444 uint32_t *masks
= (ofconn
->role
== OFPCR12_ROLE_SECONDARY
1447 return (masks
[type
] & (1u << reason
)) != 0;
1450 /* This function returns true to indicate that a packet_in message
1451 * for a "table-miss" should be sent to at least one controller.
1453 * False otherwise. */
1455 connmgr_wants_packet_in_on_miss(struct connmgr
*mgr
)
1459 atomic_read_relaxed(&mgr
->want_packet_in_on_miss
, &count
);
1463 /* Returns a human-readable name for an OpenFlow connection between 'mgr' and
1464 * 'target', suitable for use in log messages for identifying the connection.
1466 * The name is dynamically allocated. The caller should free it (with free())
1467 * when it is no longer needed. */
1469 ofconn_make_name(const struct connmgr
*mgr
, const char *target
)
1471 return xasprintf("%s<->%s", mgr
->name
, target
);
1475 ofconn_set_rate_limit(struct ofconn
*ofconn
, int rate
, int burst
)
1477 for (int i
= 0; i
< N_SCHEDULERS
; i
++) {
1478 struct pinsched
**s
= &ofconn
->schedulers
[i
];
1482 *s
= pinsched_create(rate
, burst
);
1484 pinsched_set_limits(*s
, rate
, burst
);
1487 pinsched_destroy(*s
);
1494 ofconn_send(const struct ofconn
*ofconn
, struct ofpbuf
*msg
,
1495 struct rconn_packet_counter
*counter
)
1497 ofpmsg_update_length(msg
);
1498 rconn_send(ofconn
->rconn
, msg
, counter
);
1501 /* Sending asynchronous messages. */
1503 /* Sends an OFPT_PORT_STATUS message with 'new_pp' and 'reason' to appropriate
1504 * controllers managed by 'mgr'. For messages caused by a controller
1505 * OFPT_PORT_MOD, specify 'source' as the controller connection that sent the
1506 * request; otherwise, specify 'source' as NULL.
1508 * If 'reason' is OFPPR_MODIFY and 'old_pp' is nonnull, then messages are
1509 * suppressed in the case where the change would not be visible to a particular
1510 * controller. For example, OpenFlow 1.0 does not have the OFPPS_LIVE flag, so
1511 * this would suppress a change solely to that flag from being sent to an
1512 * OpenFlow 1.0 controller. */
1514 connmgr_send_port_status(struct connmgr
*mgr
, struct ofconn
*source
,
1515 const struct ofputil_phy_port
*old_pp
,
1516 const struct ofputil_phy_port
*new_pp
,
1519 /* XXX Should limit the number of queued port status change messages. */
1520 struct ofputil_port_status new_ps
= { reason
, *new_pp
};
1522 struct ofconn
*ofconn
;
1523 LIST_FOR_EACH (ofconn
, connmgr_node
, &mgr
->conns
) {
1524 if (ofconn_receives_async_msg(ofconn
, OAM_PORT_STATUS
, reason
)) {
1525 /* Before 1.5, OpenFlow specified that OFPT_PORT_MOD should not
1526 * generate OFPT_PORT_STATUS messages. That requirement was a
1527 * relic of how OpenFlow originally supported a single controller,
1528 * so that one could expect the controller to already know the
1529 * changes it had made.
1531 * EXT-338 changes OpenFlow 1.5 OFPT_PORT_MOD to send
1532 * OFPT_PORT_STATUS messages to every controller. This is
1533 * obviously more useful in the multi-controller case. We could
1534 * always implement it that way in OVS, but that would risk
1535 * confusing controllers that are intended for single-controller
1536 * use only. (Imagine a controller that generates an OFPT_PORT_MOD
1537 * in response to any OFPT_PORT_STATUS!)
1539 * So this compromises: for OpenFlow 1.4 and earlier, it generates
1540 * OFPT_PORT_STATUS for OFPT_PORT_MOD, but not back to the
1541 * originating controller. In a single-controller environment, in
1542 * particular, this means that it will never generate
1543 * OFPT_PORT_STATUS for OFPT_PORT_MOD at all. */
1544 if (ofconn
== source
1545 && rconn_get_version(ofconn
->rconn
) < OFP15_VERSION
) {
1549 enum ofputil_protocol protocol
= ofconn_get_protocol(ofconn
);
1550 struct ofpbuf
*msg
= ofputil_encode_port_status(&new_ps
, protocol
);
1551 if (reason
== OFPPR_MODIFY
&& old_pp
) {
1552 struct ofputil_port_status old_ps
= { reason
, *old_pp
};
1553 struct ofpbuf
*old_msg
= ofputil_encode_port_status(&old_ps
,
1555 bool suppress
= ofpbuf_equal(msg
, old_msg
);
1556 ofpbuf_delete(old_msg
);
1564 ofconn_send(ofconn
, msg
, NULL
);
1569 /* Sends an OFPT_REQUESTFORWARD message with 'request' and 'reason' to
1570 * appropriate controllers managed by 'mgr'. For messages caused by a
1571 * controller OFPT_GROUP_MOD and OFPT_METER_MOD, specify 'source' as the
1572 * controller connection that sent the request; otherwise, specify 'source'
1575 connmgr_send_requestforward(struct connmgr
*mgr
, const struct ofconn
*source
,
1576 const struct ofputil_requestforward
*rf
)
1578 struct ofconn
*ofconn
;
1580 LIST_FOR_EACH (ofconn
, connmgr_node
, &mgr
->conns
) {
1581 /* METER_MOD only supported in OF13 and up. */
1582 if (rf
->reason
== OFPRFR_METER_MOD
1583 && rconn_get_version(ofconn
->rconn
) < OFP13_VERSION
) {
1587 if (ofconn_receives_async_msg(ofconn
, OAM_REQUESTFORWARD
, rf
->reason
)
1588 && ofconn
!= source
) {
1589 enum ofputil_protocol protocol
= ofconn_get_protocol(ofconn
);
1590 ofconn_send(ofconn
, ofputil_encode_requestforward(rf
, protocol
),
1596 /* Sends an OFPT_FLOW_REMOVED or NXT_FLOW_REMOVED message based on 'fr' to
1597 * appropriate controllers managed by 'mgr'.
1599 * This may be called from the RCU thread. */
1601 connmgr_send_flow_removed(struct connmgr
*mgr
,
1602 const struct ofputil_flow_removed
*fr
)
1603 OVS_REQUIRES(ofproto_mutex
)
1605 struct ofconn
*ofconn
;
1607 LIST_FOR_EACH (ofconn
, connmgr_node
, &mgr
->conns
) {
1608 if (ofconn_receives_async_msg(ofconn
, OAM_FLOW_REMOVED
, fr
->reason
)) {
1609 /* Account flow expirations as replies to OpenFlow requests. That
1610 * works because preventing OpenFlow requests from being processed
1611 * also prevents new flows from being added (and expiring). (It
1612 * also prevents processing OpenFlow requests that would not add
1613 * new flows, so it is imperfect.) */
1614 struct ofpbuf
*msg
= ofputil_encode_flow_removed(
1615 fr
, ofconn_get_protocol(ofconn
));
1616 ofconn_send_reply(ofconn
, msg
);
1621 /* Sends an OFPT_TABLE_STATUS message with 'reason' to appropriate controllers
1622 * managed by 'mgr'. When the table state changes, the controller needs to be
1623 * informed with the OFPT_TABLE_STATUS message. The reason values
1624 * OFPTR_VACANCY_DOWN and OFPTR_VACANCY_UP identify a vacancy message. The
1625 * vacancy events are generated when the remaining space in the flow table
1626 * changes and crosses one of the vacancy thereshold specified by
1627 * OFPT_TABLE_MOD. */
1629 connmgr_send_table_status(struct connmgr
*mgr
,
1630 const struct ofputil_table_desc
*td
,
1633 struct ofputil_table_status ts
= {
1638 struct ofconn
*ofconn
;
1639 LIST_FOR_EACH (ofconn
, connmgr_node
, &mgr
->conns
) {
1640 if (ofconn_receives_async_msg(ofconn
, OAM_TABLE_STATUS
, reason
)) {
1643 msg
= ofputil_encode_table_status(&ts
,
1644 ofconn_get_protocol(ofconn
));
1646 ofconn_send(ofconn
, msg
, NULL
);
1652 /* Given 'pin', sends an OFPT_PACKET_IN message to each OpenFlow controller as
1653 * necessary according to their individual configurations. */
1655 connmgr_send_async_msg(struct connmgr
*mgr
,
1656 const struct ofproto_async_msg
*am
)
1658 struct ofconn
*ofconn
;
1660 LIST_FOR_EACH (ofconn
, connmgr_node
, &mgr
->conns
) {
1661 enum ofputil_protocol protocol
= ofconn_get_protocol(ofconn
);
1662 if (protocol
== OFPUTIL_P_NONE
|| !rconn_is_connected(ofconn
->rconn
)
1663 || ofconn
->controller_id
!= am
->controller_id
1664 || !ofconn_receives_async_msg(ofconn
, am
->oam
,
1665 am
->pin
.up
.base
.reason
)) {
1669 struct ofpbuf
*msg
= ofputil_encode_packet_in_private(
1670 &am
->pin
.up
, protocol
, ofconn
->packet_in_format
);
1672 struct ovs_list txq
;
1673 bool is_miss
= (am
->pin
.up
.base
.reason
== OFPR_NO_MATCH
||
1674 am
->pin
.up
.base
.reason
== OFPR_EXPLICIT_MISS
||
1675 am
->pin
.up
.base
.reason
== OFPR_IMPLICIT_MISS
);
1676 pinsched_send(ofconn
->schedulers
[is_miss
],
1677 am
->pin
.up
.base
.flow_metadata
.flow
.in_port
.ofp_port
,
1679 do_send_packet_ins(ofconn
, &txq
);
1684 do_send_packet_ins(struct ofconn
*ofconn
, struct ovs_list
*txq
)
1688 LIST_FOR_EACH_POP (pin
, list_node
, txq
) {
1689 if (rconn_send_with_limit(ofconn
->rconn
, pin
,
1690 ofconn
->packet_in_counter
,
1691 ofconn
->packet_in_queue_size
) == EAGAIN
) {
1692 static struct vlog_rate_limit rll
= VLOG_RATE_LIMIT_INIT(5, 5);
1694 VLOG_INFO_RL(&rll
, "%s: dropping packet-in due to queue overflow",
1695 rconn_get_name(ofconn
->rconn
));
1700 /* Fail-open settings. */
1702 /* Returns the failure handling mode (OFPROTO_FAIL_SECURE or
1703 * OFPROTO_FAIL_STANDALONE) for 'mgr'. */
1704 enum ofproto_fail_mode
1705 connmgr_get_fail_mode(const struct connmgr
*mgr
)
1707 return mgr
->fail_mode
;
1710 /* Sets the failure handling mode for 'mgr' to 'fail_mode' (either
1711 * OFPROTO_FAIL_SECURE or OFPROTO_FAIL_STANDALONE). */
1713 connmgr_set_fail_mode(struct connmgr
*mgr
, enum ofproto_fail_mode fail_mode
)
1715 if (mgr
->fail_mode
!= fail_mode
) {
1716 mgr
->fail_mode
= fail_mode
;
1717 update_fail_open(mgr
);
1718 if (!connmgr_has_controllers(mgr
)) {
1719 ofproto_flush_flows(mgr
->ofproto
);
1724 /* Fail-open implementation. */
1726 /* Returns the longest probe interval among the primary controllers configured
1727 * on 'mgr'. Returns 0 if there are no primary controllers. */
1729 connmgr_get_max_probe_interval(const struct connmgr
*mgr
)
1731 int max_probe_interval
= 0;
1733 struct ofservice
*ofservice
;
1734 HMAP_FOR_EACH (ofservice
, hmap_node
, &mgr
->services
) {
1735 if (ofservice
->type
== OFCONN_PRIMARY
) {
1736 int probe_interval
= ofservice
->s
.probe_interval
;
1737 max_probe_interval
= MAX(max_probe_interval
, probe_interval
);
1740 return max_probe_interval
;
1743 /* Returns the number of seconds for which all of 'mgr's active, primary
1744 * controllers have been disconnected. Returns 0 if 'mgr' has no active,
1745 * primary controllers. */
1747 connmgr_failure_duration(const struct connmgr
*mgr
)
1749 int min_failure_duration
= INT_MAX
;
1751 struct ofservice
*ofservice
;
1752 HMAP_FOR_EACH (ofservice
, hmap_node
, &mgr
->services
) {
1753 if (ofservice
->s
.type
== OFCONN_PRIMARY
&& ofservice
->rconn
) {
1754 int failure_duration
= rconn_failure_duration(ofservice
->rconn
);
1755 min_failure_duration
= MIN(min_failure_duration
, failure_duration
);
1759 return min_failure_duration
!= INT_MAX
? min_failure_duration
: 0;
1762 /* Returns true if at least one primary controller is connected (regardless of
1763 * whether those controllers are believed to have authenticated and accepted
1764 * this switch), false if none of them are connected. */
1766 connmgr_is_any_controller_connected(const struct connmgr
*mgr
)
1768 struct ofservice
*ofservice
;
1769 HMAP_FOR_EACH (ofservice
, hmap_node
, &mgr
->services
) {
1770 if (ofservice
->s
.type
== OFCONN_PRIMARY
1771 && !ovs_list_is_empty(&ofservice
->conns
)) {
1778 /* Returns true if at least one primary controller is believed to have
1779 * authenticated and accepted this switch, false otherwise. */
1781 connmgr_is_any_controller_admitted(const struct connmgr
*mgr
)
1783 const struct ofconn
*ofconn
;
1785 LIST_FOR_EACH (ofconn
, connmgr_node
, &mgr
->conns
) {
1786 if (ofconn
->type
== OFCONN_PRIMARY
1787 && rconn_is_admitted(ofconn
->rconn
)) {
1794 /* In-band configuration. */
1796 static bool any_extras_changed(const struct connmgr
*,
1797 const struct sockaddr_in
*extras
, size_t n
);
1799 /* Sets the 'n' TCP port addresses in 'extras' as ones to which 'mgr''s
1800 * in-band control should guarantee access, in the same way that in-band
1801 * control guarantees access to OpenFlow controllers. */
1803 connmgr_set_extra_in_band_remotes(struct connmgr
*mgr
,
1804 const struct sockaddr_in
*extras
, size_t n
)
1806 if (!any_extras_changed(mgr
, extras
, n
)) {
1810 free(mgr
->extra_in_band_remotes
);
1811 mgr
->n_extra_remotes
= n
;
1812 mgr
->extra_in_band_remotes
= xmemdup(extras
, n
* sizeof *extras
);
1814 update_in_band_remotes(mgr
);
1817 /* Sets the OpenFlow queue used by flows set up by in-band control on
1818 * 'mgr' to 'queue_id'. If 'queue_id' is negative, then in-band control
1819 * flows will use the default queue. */
1821 connmgr_set_in_band_queue(struct connmgr
*mgr
, int queue_id
)
1823 if (queue_id
!= mgr
->in_band_queue
) {
1824 mgr
->in_band_queue
= queue_id
;
1825 update_in_band_remotes(mgr
);
1830 any_extras_changed(const struct connmgr
*mgr
,
1831 const struct sockaddr_in
*extras
, size_t n
)
1833 if (n
!= mgr
->n_extra_remotes
) {
1837 for (size_t i
= 0; i
< n
; i
++) {
1838 const struct sockaddr_in
*old
= &mgr
->extra_in_band_remotes
[i
];
1839 const struct sockaddr_in
*new = &extras
[i
];
1841 if (old
->sin_addr
.s_addr
!= new->sin_addr
.s_addr
||
1842 old
->sin_port
!= new->sin_port
) {
1850 /* In-band implementation. */
1853 connmgr_has_in_band(struct connmgr
*mgr
)
1855 return mgr
->in_band
!= NULL
;
1858 /* Fail-open and in-band implementation. */
1860 /* Called by 'ofproto' after all flows have been flushed, to allow fail-open
1861 * and standalone mode to re-create their flows.
1863 * In-band control has more sophisticated code that manages flows itself. */
1865 connmgr_flushed(struct connmgr
*mgr
)
1866 OVS_EXCLUDED(ofproto_mutex
)
1868 if (mgr
->fail_open
) {
1869 fail_open_flushed(mgr
->fail_open
);
1872 /* If there are no controllers and we're in standalone mode, set up a flow
1873 * that matches every packet and directs them to OFPP_NORMAL (which goes to
1874 * us). Otherwise, the switch is in secure mode and we won't pass any
1875 * traffic until a controller has been defined and it tells us to do so. */
1876 if (!connmgr_has_controllers(mgr
)
1877 && mgr
->fail_mode
== OFPROTO_FAIL_STANDALONE
) {
1878 struct ofpbuf ofpacts
;
1881 ofpbuf_init(&ofpacts
, sizeof(struct ofpact_output
));
1882 ofpact_put_OUTPUT(&ofpacts
)->port
= OFPP_NORMAL
;
1884 match_init_catchall(&match
);
1885 ofproto_add_flow(mgr
->ofproto
, &match
, 0, ofpacts
.data
,
1888 ofpbuf_uninit(&ofpacts
);
1892 /* Returns the number of hidden rules created by the in-band and fail-open
1893 * implementations in table 0. (Subtracting this count from the number of
1894 * rules in the table 0 classifier, as maintained in struct oftable, yields
1895 * the number of flows that OVS should report via OpenFlow for table 0.) */
1897 connmgr_count_hidden_rules(const struct connmgr
*mgr
)
1901 n_hidden
+= in_band_count_rules(mgr
->in_band
);
1903 if (mgr
->fail_open
) {
1904 n_hidden
+= fail_open_count_rules(mgr
->fail_open
);
1909 /* Creates a new ofservice for 'target' in 'mgr'. Returns 0 if successful,
1910 * otherwise a positive errno value.
1912 * ofservice_reconfigure() must be called to fully configure the new
1915 ofservice_create(struct connmgr
*mgr
, const char *target
,
1916 const struct ofproto_controller
*c
)
1917 OVS_REQUIRES(ofproto_mutex
)
1919 struct pvconn
*pvconn
= NULL
;
1920 struct rconn
*rconn
= NULL
;
1921 if (!vconn_verify_name(target
)) {
1922 char *name
= ofconn_make_name(mgr
, target
);
1923 rconn
= rconn_create(5, 8, c
->dscp
, c
->allowed_versions
);
1924 rconn_connect(rconn
, target
, name
);
1926 } else if (!pvconn_verify_name(target
)) {
1927 int error
= pvconn_open(target
, c
->allowed_versions
, c
->dscp
, &pvconn
);
1932 VLOG_WARN_RL(&rl
, "%s: unsupported controller \"%s\"",
1937 struct ofservice
*ofservice
= xzalloc(sizeof *ofservice
);
1938 hmap_insert(&mgr
->services
, &ofservice
->hmap_node
, hash_string(target
, 0));
1939 ofservice
->connmgr
= mgr
;
1940 ofservice
->target
= xstrdup(target
);
1941 ovs_list_init(&ofservice
->conns
);
1942 ofservice
->type
= c
->type
;
1943 ofservice
->rconn
= rconn
;
1944 ofservice
->pvconn
= pvconn
;
1946 ofservice_reconfigure(ofservice
, c
);
1948 VLOG_INFO("%s: added %s controller \"%s\"",
1949 mgr
->name
, ofconn_type_to_string(ofservice
->type
), target
);
1953 ofservice_close_all(struct ofservice
*ofservice
)
1954 OVS_REQUIRES(ofproto_mutex
)
1956 struct ofconn
*ofconn
, *next
;
1957 LIST_FOR_EACH_SAFE (ofconn
, next
, ofservice_node
, &ofservice
->conns
) {
1958 ofconn_destroy(ofconn
);
1963 ofservice_destroy(struct ofservice
*ofservice
)
1964 OVS_REQUIRES(ofproto_mutex
)
1970 ofservice_close_all(ofservice
);
1972 hmap_remove(&ofservice
->connmgr
->services
, &ofservice
->hmap_node
);
1973 free(ofservice
->target
);
1974 if (ofservice
->pvconn
) {
1975 pvconn_close(ofservice
->pvconn
);
1977 if (ofservice
->rconn
) {
1978 rconn_destroy(ofservice
->rconn
);
1984 ofservice_run(struct ofservice
*ofservice
)
1986 if (ofservice
->pvconn
) {
1987 struct vconn
*vconn
;
1988 int retval
= pvconn_accept(ofservice
->pvconn
, &vconn
);
1990 /* Passing default value for creation of the rconn */
1991 struct rconn
*rconn
= rconn_create(
1992 ofservice
->s
.probe_interval
, ofservice
->s
.max_backoff
,
1993 ofservice
->s
.dscp
, ofservice
->s
.allowed_versions
);
1994 char *name
= ofconn_make_name(ofservice
->connmgr
,
1995 vconn_get_name(vconn
));
1996 rconn_connect_unreliably(rconn
, vconn
, name
);
1999 ofconn_create(ofservice
, rconn
, &ofservice
->s
);
2000 } else if (retval
!= EAGAIN
) {
2001 VLOG_WARN_RL(&rl
, "accept failed (%s)", ovs_strerror(retval
));
2004 rconn_run(ofservice
->rconn
);
2006 bool connected
= rconn_is_connected(ofservice
->rconn
);
2007 bool has_ofconn
= !ovs_list_is_empty(&ofservice
->conns
);
2008 if (connected
&& !has_ofconn
) {
2009 ofconn_create(ofservice
, ofservice
->rconn
, &ofservice
->s
);
2015 ofservice_wait(struct ofservice
*ofservice
)
2017 if (ofservice
->pvconn
) {
2018 pvconn_wait(ofservice
->pvconn
);
2023 ofservice_reconfigure(struct ofservice
*ofservice
,
2024 const struct ofproto_controller
*settings
)
2025 OVS_REQUIRES(ofproto_mutex
)
2027 /* If the allowed OpenFlow versions change, a full cleanup is needed
2028 * for the ofservice and connections. */
2029 if (ofservice
->s
.allowed_versions
!= settings
->allowed_versions
) {
2033 ofservice
->s
= *settings
;
2035 struct ofconn
*ofconn
;
2036 LIST_FOR_EACH (ofconn
, ofservice_node
, &ofservice
->conns
) {
2037 ofconn_reconfigure(ofconn
, settings
);
2043 /* Finds and returns the ofservice within 'mgr' that has the given
2044 * 'target', or a null pointer if none exists. */
2045 static struct ofservice
*
2046 ofservice_lookup(struct connmgr
*mgr
, const char *target
)
2048 struct ofservice
*ofservice
;
2050 HMAP_FOR_EACH_WITH_HASH (ofservice
, hmap_node
, hash_string(target
, 0),
2052 if (!strcmp(ofservice
->target
, target
)) {
2059 /* Flow monitors (NXST_FLOW_MONITOR). */
2061 /* A counter incremented when something significant happens to an OpenFlow
2064 * - When a rule is added, its 'add_seqno' and 'modify_seqno' are set to
2065 * the current value (which is then incremented).
2067 * - When a rule is modified, its 'modify_seqno' is set to the current
2068 * value (which is then incremented).
2070 * Thus, by comparing an old value of monitor_seqno against a rule's
2071 * 'add_seqno', one can tell whether the rule was added before or after the old
2072 * value was read, and similarly for 'modify_seqno'.
2074 * 32 bits should normally be sufficient (and would be nice, to save space in
2075 * each rule) but then we'd have to have some special cases for wraparound.
2077 * We initialize monitor_seqno to 1 to allow 0 to be used as an invalid
2079 static uint64_t monitor_seqno
= 1;
2081 COVERAGE_DEFINE(ofmonitor_pause
);
2082 COVERAGE_DEFINE(ofmonitor_resume
);
2085 ofmonitor_create(const struct ofputil_flow_monitor_request
*request
,
2086 struct ofconn
*ofconn
, struct ofmonitor
**monitorp
)
2087 OVS_REQUIRES(ofproto_mutex
)
2091 struct ofmonitor
*m
= ofmonitor_lookup(ofconn
, request
->id
);
2093 return OFPERR_OFPMOFC_MONITOR_EXISTS
;
2096 m
= xmalloc(sizeof *m
);
2098 hmap_insert(&ofconn
->monitors
, &m
->ofconn_node
, hash_int(request
->id
, 0));
2099 m
->id
= request
->id
;
2100 m
->flags
= request
->flags
;
2101 m
->out_port
= request
->out_port
;
2102 m
->table_id
= request
->table_id
;
2103 minimatch_init(&m
->match
, &request
->match
);
2110 ofmonitor_lookup(struct ofconn
*ofconn
, uint32_t id
)
2111 OVS_REQUIRES(ofproto_mutex
)
2113 struct ofmonitor
*m
;
2115 HMAP_FOR_EACH_IN_BUCKET (m
, ofconn_node
, hash_int(id
, 0),
2116 &ofconn
->monitors
) {
2125 ofmonitor_destroy(struct ofmonitor
*m
)
2126 OVS_REQUIRES(ofproto_mutex
)
2129 minimatch_destroy(&m
->match
);
2130 hmap_remove(&m
->ofconn
->monitors
, &m
->ofconn_node
);
2136 ofmonitor_report(struct connmgr
*mgr
, struct rule
*rule
,
2137 enum nx_flow_update_event event
,
2138 enum ofp_flow_removed_reason reason
,
2139 const struct ofconn
*abbrev_ofconn
, ovs_be32 abbrev_xid
,
2140 const struct rule_actions
*old_actions
)
2141 OVS_REQUIRES(ofproto_mutex
)
2143 if (rule_is_hidden(rule
)) {
2147 enum nx_flow_monitor_flags update
;
2151 rule
->add_seqno
= rule
->modify_seqno
= monitor_seqno
++;
2155 update
= NXFMF_DELETE
;
2158 case NXFME_MODIFIED
:
2159 update
= NXFMF_MODIFY
;
2160 rule
->modify_seqno
= monitor_seqno
++;
2168 struct ofconn
*ofconn
;
2169 LIST_FOR_EACH (ofconn
, connmgr_node
, &mgr
->conns
) {
2170 if (ofconn
->monitor_paused
) {
2171 /* Only send NXFME_DELETED notifications for flows that were added
2172 * before we paused. */
2173 if (event
!= NXFME_DELETED
2174 || rule
->add_seqno
> ofconn
->monitor_paused
) {
2179 enum nx_flow_monitor_flags flags
= 0;
2180 struct ofmonitor
*m
;
2181 HMAP_FOR_EACH (m
, ofconn_node
, &ofconn
->monitors
) {
2182 if (m
->flags
& update
2183 && (m
->table_id
== 0xff || m
->table_id
== rule
->table_id
)
2184 && (ofproto_rule_has_out_port(rule
, m
->out_port
)
2186 && ofpacts_output_to_port(old_actions
->ofpacts
,
2187 old_actions
->ofpacts_len
,
2189 && cls_rule_is_loose_match(&rule
->cr
, &m
->match
)) {
2195 if (ovs_list_is_empty(&ofconn
->updates
)) {
2196 ofputil_start_flow_update(&ofconn
->updates
);
2197 ofconn
->sent_abbrev_update
= false;
2200 if (flags
& NXFMF_OWN
|| ofconn
!= abbrev_ofconn
2201 || ofconn
->monitor_paused
) {
2202 struct ofputil_flow_update fu
;
2205 fu
.reason
= event
== NXFME_DELETED
? reason
: 0;
2206 fu
.table_id
= rule
->table_id
;
2207 fu
.cookie
= rule
->flow_cookie
;
2208 minimatch_expand(&rule
->cr
.match
, &fu
.match
);
2209 fu
.priority
= rule
->cr
.priority
;
2211 ovs_mutex_lock(&rule
->mutex
);
2212 fu
.idle_timeout
= rule
->idle_timeout
;
2213 fu
.hard_timeout
= rule
->hard_timeout
;
2214 ovs_mutex_unlock(&rule
->mutex
);
2216 if (flags
& NXFMF_ACTIONS
) {
2217 const struct rule_actions
*actions
2218 = rule_get_actions(rule
);
2219 fu
.ofpacts
= actions
->ofpacts
;
2220 fu
.ofpacts_len
= actions
->ofpacts_len
;
2225 ofputil_append_flow_update(&fu
, &ofconn
->updates
,
2226 ofproto_get_tun_tab(rule
->ofproto
));
2227 } else if (!ofconn
->sent_abbrev_update
) {
2228 struct ofputil_flow_update fu
;
2230 fu
.event
= NXFME_ABBREV
;
2231 fu
.xid
= abbrev_xid
;
2232 ofputil_append_flow_update(&fu
, &ofconn
->updates
,
2233 ofproto_get_tun_tab(rule
->ofproto
));
2235 ofconn
->sent_abbrev_update
= true;
2242 ofmonitor_flush(struct connmgr
*mgr
)
2243 OVS_REQUIRES(ofproto_mutex
)
2245 struct ofconn
*ofconn
;
2247 LIST_FOR_EACH (ofconn
, connmgr_node
, &mgr
->conns
) {
2248 struct rconn_packet_counter
*counter
= ofconn
->monitor_counter
;
2251 LIST_FOR_EACH_POP (msg
, list_node
, &ofconn
->updates
) {
2252 ofconn_send(ofconn
, msg
, counter
);
2255 if (!ofconn
->monitor_paused
2256 && rconn_packet_counter_n_bytes(counter
) > 128 * 1024) {
2257 COVERAGE_INC(ofmonitor_pause
);
2258 ofconn
->monitor_paused
= monitor_seqno
++;
2259 struct ofpbuf
*pause
= ofpraw_alloc_xid(
2260 OFPRAW_NXT_FLOW_MONITOR_PAUSED
, OFP10_VERSION
, htonl(0), 0);
2261 ofconn_send(ofconn
, pause
, counter
);
2267 ofmonitor_resume(struct ofconn
*ofconn
)
2268 OVS_REQUIRES(ofproto_mutex
)
2270 struct rule_collection rules
;
2271 rule_collection_init(&rules
);
2273 struct ofmonitor
*m
;
2274 HMAP_FOR_EACH (m
, ofconn_node
, &ofconn
->monitors
) {
2275 ofmonitor_collect_resume_rules(m
, ofconn
->monitor_paused
, &rules
);
2278 struct ovs_list msgs
= OVS_LIST_INITIALIZER(&msgs
);
2279 ofmonitor_compose_refresh_updates(&rules
, &msgs
);
2281 struct ofpbuf
*resumed
= ofpraw_alloc_xid(OFPRAW_NXT_FLOW_MONITOR_RESUMED
,
2282 OFP10_VERSION
, htonl(0), 0);
2283 ovs_list_push_back(&msgs
, &resumed
->list_node
);
2284 ofconn_send_replies(ofconn
, &msgs
);
2286 ofconn
->monitor_paused
= 0;
2290 ofmonitor_may_resume(const struct ofconn
*ofconn
)
2291 OVS_REQUIRES(ofproto_mutex
)
2293 return (ofconn
->monitor_paused
!= 0
2294 && !rconn_packet_counter_n_packets(ofconn
->monitor_counter
));
2298 ofmonitor_run(struct connmgr
*mgr
)
2300 ovs_mutex_lock(&ofproto_mutex
);
2301 struct ofconn
*ofconn
;
2302 LIST_FOR_EACH (ofconn
, connmgr_node
, &mgr
->conns
) {
2303 if (ofmonitor_may_resume(ofconn
)) {
2304 COVERAGE_INC(ofmonitor_resume
);
2305 ofmonitor_resume(ofconn
);
2308 ovs_mutex_unlock(&ofproto_mutex
);
2312 ofmonitor_wait(struct connmgr
*mgr
)
2314 ovs_mutex_lock(&ofproto_mutex
);
2315 struct ofconn
*ofconn
;
2316 LIST_FOR_EACH (ofconn
, connmgr_node
, &mgr
->conns
) {
2317 if (ofmonitor_may_resume(ofconn
)) {
2318 poll_immediate_wake();
2321 ovs_mutex_unlock(&ofproto_mutex
);
2325 ofproto_async_msg_free(struct ofproto_async_msg
*am
)
2327 free(am
->pin
.up
.base
.packet
);
2328 free(am
->pin
.up
.base
.userdata
);
2329 free(am
->pin
.up
.stack
);
2330 free(am
->pin
.up
.actions
);
2331 free(am
->pin
.up
.action_set
);