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 void 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 master_election_id
; /* monotonically increasing sequence number
216 * for master election */
217 bool master_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
->master_election_id
= 0;
257 mgr
->master_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 ofservice_reconfigure(ofservice
, c
);
609 ovs_mutex_unlock(&ofproto_mutex
);
611 update_in_band_remotes(mgr
);
612 update_fail_open(mgr
);
613 if (had_controllers
!= connmgr_has_controllers(mgr
)) {
614 ofproto_flush_flows(mgr
->ofproto
);
618 /* Drops the connections between 'mgr' and all of its primary and secondary
619 * controllers, forcing them to reconnect. */
621 connmgr_reconnect(const struct connmgr
*mgr
)
623 struct ofconn
*ofconn
;
625 LIST_FOR_EACH (ofconn
, connmgr_node
, &mgr
->conns
) {
626 rconn_reconnect(ofconn
->rconn
);
630 /* Sets the "snoops" for 'mgr' to the pvconn targets listed in 'snoops'.
632 * A "snoop" is a pvconn to which every OpenFlow message to or from the most
633 * important controller on 'mgr' is mirrored. */
635 connmgr_set_snoops(struct connmgr
*mgr
, const struct sset
*snoops
)
637 return set_pvconns(&mgr
->snoops
, &mgr
->n_snoops
, snoops
);
640 /* Adds each of the snoops currently configured on 'mgr' to 'snoops'. */
642 connmgr_get_snoops(const struct connmgr
*mgr
, struct sset
*snoops
)
644 for (size_t i
= 0; i
< mgr
->n_snoops
; i
++) {
645 sset_add(snoops
, pvconn_get_name(mgr
->snoops
[i
]));
649 /* Returns true if 'mgr' has at least one snoop, false if it has none. */
651 connmgr_has_snoops(const struct connmgr
*mgr
)
653 return mgr
->n_snoops
> 0;
657 update_in_band_remotes(struct connmgr
*mgr
)
659 /* Allocate enough memory for as many remotes as we could possibly have. */
660 size_t max_addrs
= mgr
->n_extra_remotes
+ hmap_count(&mgr
->services
);
661 struct sockaddr_in
*addrs
= xmalloc(max_addrs
* sizeof *addrs
);
664 /* Add all the remotes. */
665 struct ofservice
*ofservice
;
666 HMAP_FOR_EACH (ofservice
, hmap_node
, &mgr
->services
) {
667 const char *target
= ofservice
->target
;
669 struct sockaddr_storage ss
;
670 struct sockaddr_in in
;
673 if (ofservice
->s
.band
== OFPROTO_IN_BAND
674 && stream_parse_target_with_default_port(target
, OFP_PORT
, &sa
.ss
)
675 && sa
.ss
.ss_family
== AF_INET
) {
676 addrs
[n_addrs
++] = sa
.in
;
679 for (size_t i
= 0; i
< mgr
->n_extra_remotes
; i
++) {
680 addrs
[n_addrs
++] = mgr
->extra_in_band_remotes
[i
];
683 /* Create or update or destroy in-band. */
686 in_band_create(mgr
->ofproto
, mgr
->local_port_name
, &mgr
->in_band
);
689 /* in_band_run() needs a chance to delete any existing in-band flows.
690 * We will destroy mgr->in_band after it's done with that. */
693 in_band_set_queue(mgr
->in_band
, mgr
->in_band_queue
);
694 in_band_set_remotes(mgr
->in_band
, addrs
, n_addrs
);
702 update_fail_open(struct connmgr
*mgr
)
703 OVS_EXCLUDED(ofproto_mutex
)
705 if (connmgr_has_controllers(mgr
)
706 && mgr
->fail_mode
== OFPROTO_FAIL_STANDALONE
) {
707 if (!mgr
->fail_open
) {
708 mgr
->fail_open
= fail_open_create(mgr
->ofproto
, mgr
);
711 ovs_mutex_lock(&ofproto_mutex
);
712 fail_open_destroy(mgr
->fail_open
);
713 ovs_mutex_unlock(&ofproto_mutex
);
714 mgr
->fail_open
= NULL
;
719 set_pvconns(struct pvconn
***pvconnsp
, size_t *n_pvconnsp
,
720 const struct sset
*sset
)
722 /* Free the old pvconns. */
723 struct pvconn
**old_pvconns
= *pvconnsp
;
724 size_t old_n_pvconns
= *n_pvconnsp
;
725 for (size_t i
= 0; i
< old_n_pvconns
; i
++) {
726 pvconn_close(old_pvconns
[i
]);
730 /* Populate the new pvconns. */
731 struct pvconn
**new_pvconns
= xmalloc(sset_count(sset
)
732 * sizeof *new_pvconns
);
733 size_t new_n_pvconns
= 0;
737 SSET_FOR_EACH (name
, sset
) {
738 struct pvconn
*pvconn
;
739 int error
= pvconn_open(name
, 0, 0, &pvconn
);
741 new_pvconns
[new_n_pvconns
++] = pvconn
;
743 VLOG_ERR("failed to listen on %s: %s", name
, ovs_strerror(error
));
750 *pvconnsp
= new_pvconns
;
751 *n_pvconnsp
= new_n_pvconns
;
756 /* Returns a "preference level" for snooping 'ofconn'. A higher return value
757 * means that 'ofconn' is more interesting for monitoring than a lower return
760 snoop_preference(const struct ofservice
*ofservice
)
762 struct ofconn
*ofconn
= ofservice_first_conn(ofservice
);
767 switch (ofconn
->role
) {
768 case OFPCR12_ROLE_MASTER
:
770 case OFPCR12_ROLE_EQUAL
:
772 case OFPCR12_ROLE_SLAVE
:
774 case OFPCR12_ROLE_NOCHANGE
:
776 /* Shouldn't happen. */
781 /* One of 'mgr''s "snoop" pvconns has accepted a new connection on 'vconn'.
782 * Connects this vconn to a controller. */
784 add_snooper(struct connmgr
*mgr
, struct vconn
*vconn
)
786 /* Pick a controller for monitoring. */
787 struct ofservice
*best
= NULL
;
788 struct ofservice
*ofservice
;
789 HMAP_FOR_EACH (ofservice
, hmap_node
, &mgr
->services
) {
790 if (ofservice
->rconn
&&
791 (!best
|| snoop_preference(ofservice
) > snoop_preference(best
))) {
797 rconn_add_monitor(best
->rconn
, vconn
);
799 VLOG_INFO_RL(&rl
, "no controller connection to snoop");
804 /* Public ofconn functions. */
806 /* Returns the connection type, either OFCONN_PRIMARY or OFCONN_SERVICE. */
808 ofconn_get_type(const struct ofconn
*ofconn
)
813 /* If a master election id is defined, stores it into '*idp' and returns
814 * true. Otherwise, stores UINT64_MAX into '*idp' and returns false. */
816 ofconn_get_master_election_id(const struct ofconn
*ofconn
, uint64_t *idp
)
818 *idp
= (ofconn
->connmgr
->master_election_id_defined
819 ? ofconn
->connmgr
->master_election_id
821 return ofconn
->connmgr
->master_election_id_defined
;
824 /* Sets the master election id.
826 * Returns true if successful, false if the id is stale
829 ofconn_set_master_election_id(struct ofconn
*ofconn
, uint64_t id
)
831 if (ofconn
->connmgr
->master_election_id_defined
833 /* Unsigned difference interpreted as a two's complement signed
835 (int64_t)(id
- ofconn
->connmgr
->master_election_id
) < 0) {
838 ofconn
->connmgr
->master_election_id
= id
;
839 ofconn
->connmgr
->master_election_id_defined
= true;
844 /* Returns the role configured for 'ofconn'.
846 * The default role, if no other role has been set, is OFPCR12_ROLE_EQUAL. */
847 enum ofp12_controller_role
848 ofconn_get_role(const struct ofconn
*ofconn
)
854 ofconn_send_role_status(struct ofconn
*ofconn
, uint32_t role
, uint8_t reason
)
856 struct ofputil_role_status status
;
857 status
.reason
= reason
;
859 ofconn_get_master_election_id(ofconn
, &status
.generation_id
);
862 = ofputil_encode_role_status(&status
, ofconn_get_protocol(ofconn
));
864 ofconn_send(ofconn
, buf
, NULL
);
868 /* Changes 'ofconn''s role to 'role'. If 'role' is OFPCR12_ROLE_MASTER then
869 * any existing master is demoted to a slave. */
871 ofconn_set_role(struct ofconn
*ofconn
, enum ofp12_controller_role role
)
873 if (role
!= ofconn
->role
&& role
== OFPCR12_ROLE_MASTER
) {
874 struct ofconn
*other
;
876 LIST_FOR_EACH (other
, connmgr_node
, &ofconn
->connmgr
->conns
) {
877 if (other
->role
== OFPCR12_ROLE_MASTER
) {
878 other
->role
= OFPCR12_ROLE_SLAVE
;
879 ofconn_send_role_status(other
, OFPCR12_ROLE_SLAVE
,
880 OFPCRR_MASTER_REQUEST
);
888 ofconn_set_invalid_ttl_to_controller(struct ofconn
*ofconn
, bool enable
)
890 struct ofputil_async_cfg ac
= ofconn_get_async_config(ofconn
);
891 uint32_t bit
= 1u << OFPR_INVALID_TTL
;
893 ac
.master
[OAM_PACKET_IN
] |= bit
;
895 ac
.master
[OAM_PACKET_IN
] &= ~bit
;
897 ofconn_set_async_config(ofconn
, &ac
);
901 ofconn_get_invalid_ttl_to_controller(struct ofconn
*ofconn
)
903 struct ofputil_async_cfg ac
= ofconn_get_async_config(ofconn
);
904 uint32_t bit
= 1u << OFPR_INVALID_TTL
;
905 return (ac
.master
[OAM_PACKET_IN
] & bit
) != 0;
908 /* Returns the currently configured protocol for 'ofconn', one of OFPUTIL_P_*.
910 * Returns OFPUTIL_P_NONE, which is not a valid protocol, if 'ofconn' hasn't
911 * completed version negotiation. This can't happen if at least one OpenFlow
912 * message, other than OFPT_HELLO, has been received on the connection (such as
913 * in ofproto.c's message handling code), since version negotiation is a
914 * prerequisite for starting to receive messages. This means that
915 * OFPUTIL_P_NONE is a special case that most callers need not worry about. */
916 enum ofputil_protocol
917 ofconn_get_protocol(const struct ofconn
*ofconn
)
919 if (ofconn
->protocol
== OFPUTIL_P_NONE
&&
920 rconn_is_connected(ofconn
->rconn
)) {
921 int version
= rconn_get_version(ofconn
->rconn
);
923 ofconn_set_protocol(CONST_CAST(struct ofconn
*, ofconn
),
924 ofputil_protocol_from_ofp_version(version
));
928 return ofconn
->protocol
;
931 /* Sets the protocol for 'ofconn' to 'protocol' (one of OFPUTIL_P_*).
933 * (This doesn't actually send anything to accomplish this. Presumably the
934 * caller already did that.) */
936 ofconn_set_protocol(struct ofconn
*ofconn
, enum ofputil_protocol protocol
)
938 ofconn
->protocol
= protocol
;
939 update_want_packet_in_on_miss(ofconn
);
942 /* Returns the currently configured packet in format for 'ofconn', one of
945 * The default, if no other format has been set, is NXPIF_STANDARD. */
946 enum ofputil_packet_in_format
947 ofconn_get_packet_in_format(struct ofconn
*ofconn
)
949 return ofconn
->packet_in_format
;
952 /* Sets the packet in format for 'ofconn' to 'packet_in_format' (one of
955 ofconn_set_packet_in_format(struct ofconn
*ofconn
,
956 enum ofputil_packet_in_format packet_in_format
)
958 ofconn
->packet_in_format
= packet_in_format
;
961 /* Sets the controller connection ID for 'ofconn' to 'controller_id'.
963 * The connection controller ID is used for OFPP_CONTROLLER and
964 * NXAST_CONTROLLER actions. See "struct nx_action_controller" for details. */
966 ofconn_set_controller_id(struct ofconn
*ofconn
, uint16_t controller_id
)
968 ofconn
->controller_id
= controller_id
;
969 update_want_packet_in_on_miss(ofconn
);
972 /* Returns the default miss send length for 'ofconn'. */
974 ofconn_get_miss_send_len(const struct ofconn
*ofconn
)
976 return ofconn
->miss_send_len
;
979 /* Sets the default miss send length for 'ofconn' to 'miss_send_len'. */
981 ofconn_set_miss_send_len(struct ofconn
*ofconn
, int miss_send_len
)
983 ofconn
->miss_send_len
= miss_send_len
;
987 ofconn_set_async_config(struct ofconn
*ofconn
,
988 const struct ofputil_async_cfg
*ac
)
990 if (!ofconn
->async_cfg
) {
991 ofconn
->async_cfg
= xmalloc(sizeof *ofconn
->async_cfg
);
993 *ofconn
->async_cfg
= *ac
;
995 if (ofputil_protocol_to_ofp_version(ofconn_get_protocol(ofconn
))
997 if (ofconn
->async_cfg
->master
[OAM_PACKET_IN
] & (1u << OFPR_ACTION
)) {
998 ofconn
->async_cfg
->master
[OAM_PACKET_IN
] |= OFPR14_ACTION_BITS
;
1000 if (ofconn
->async_cfg
->slave
[OAM_PACKET_IN
] & (1u << OFPR_ACTION
)) {
1001 ofconn
->async_cfg
->slave
[OAM_PACKET_IN
] |= OFPR14_ACTION_BITS
;
1006 struct ofputil_async_cfg
1007 ofconn_get_async_config(const struct ofconn
*ofconn
)
1009 if (ofconn
->async_cfg
) {
1010 return *ofconn
->async_cfg
;
1013 int version
= rconn_get_version(ofconn
->rconn
);
1014 return (version
< 0 || !ofconn
->ofservice
->s
.enable_async_msgs
1015 ? OFPUTIL_ASYNC_CFG_INIT
1016 : ofputil_async_cfg_default(version
));
1019 /* Sends 'msg' on 'ofconn', accounting it as a reply. (If there is a
1020 * sufficient number of OpenFlow replies in-flight on a single ofconn, then the
1021 * connmgr will stop accepting new OpenFlow requests on that ofconn until the
1022 * controller has accepted some of the replies.) */
1024 ofconn_send_reply(const struct ofconn
*ofconn
, struct ofpbuf
*msg
)
1026 ofconn_send(ofconn
, msg
, ofconn
->reply_counter
);
1029 /* Sends each of the messages in list 'replies' on 'ofconn' in order,
1030 * accounting them as replies. */
1032 ofconn_send_replies(const struct ofconn
*ofconn
, struct ovs_list
*replies
)
1034 struct ofpbuf
*reply
;
1036 LIST_FOR_EACH_POP (reply
, list_node
, replies
) {
1037 ofconn_send_reply(ofconn
, reply
);
1041 /* Sends 'error' on 'ofconn', as a reply to 'request'. */
1043 ofconn_send_error(const struct ofconn
*ofconn
,
1044 const struct ofp_header
*request
, enum ofperr error
)
1046 static struct vlog_rate_limit err_rl
= VLOG_RATE_LIMIT_INIT(10, 10);
1047 struct ofpbuf
*reply
= ofperr_encode_reply(error
, request
);
1048 if (!VLOG_DROP_INFO(&err_rl
)) {
1049 size_t request_len
= ntohs(request
->length
);
1052 const char *type_name
= (!ofpraw_decode_partial(&raw
, request
,
1053 MIN(64, request_len
))
1054 ? ofpraw_get_name(raw
)
1057 VLOG_INFO("%s: sending %s error reply to %s message",
1058 rconn_get_name(ofconn
->rconn
), ofperr_to_string(error
),
1061 ofconn_send_reply(ofconn
, reply
);
1064 /* Reports that a flow_mod operation of the type specified by 'command' was
1065 * successfully executed by 'ofconn', so that the connmgr can log it. */
1067 ofconn_report_flow_mod(struct ofconn
*ofconn
,
1068 enum ofp_flow_mod_command command
)
1076 case OFPFC_MODIFY_STRICT
:
1081 case OFPFC_DELETE_STRICT
:
1086 long long int now
= time_msec();
1087 if (ofconn
->next_op_report
== LLONG_MAX
) {
1088 ofconn
->first_op
= now
;
1089 ofconn
->next_op_report
= MAX(now
+ 10 * 1000, ofconn
->op_backoff
);
1090 ofconn
->op_backoff
= ofconn
->next_op_report
+ 60 * 1000;
1092 ofconn
->last_op
= now
;
1095 /* OpenFlow 1.4 bundles. */
1097 static inline uint32_t
1098 bundle_hash(uint32_t id
)
1100 return hash_int(id
, 0);
1104 ofconn_get_bundle(struct ofconn
*ofconn
, uint32_t id
)
1106 struct ofp_bundle
*bundle
;
1108 HMAP_FOR_EACH_IN_BUCKET(bundle
, node
, bundle_hash(id
), &ofconn
->bundles
) {
1109 if (bundle
->id
== id
) {
1118 ofconn_insert_bundle(struct ofconn
*ofconn
, struct ofp_bundle
*bundle
)
1120 hmap_insert(&ofconn
->bundles
, &bundle
->node
, bundle_hash(bundle
->id
));
1124 ofconn_remove_bundle(struct ofconn
*ofconn
, struct ofp_bundle
*bundle
)
1126 hmap_remove(&ofconn
->bundles
, &bundle
->node
);
1130 bundle_remove_all(struct ofconn
*ofconn
)
1132 struct ofp_bundle
*b
, *next
;
1134 HMAP_FOR_EACH_SAFE (b
, next
, node
, &ofconn
->bundles
) {
1135 ofp_bundle_remove__(ofconn
, b
);
1140 bundle_remove_expired(struct ofconn
*ofconn
, long long int now
)
1142 long long int limit
= now
- bundle_idle_timeout
;
1144 struct ofp_bundle
*b
, *next
;
1145 HMAP_FOR_EACH_SAFE (b
, next
, node
, &ofconn
->bundles
) {
1146 if (b
->used
<= limit
) {
1147 ofconn_send_error(ofconn
, b
->msg
, OFPERR_OFPBFC_TIMEOUT
);
1148 ofp_bundle_remove__(ofconn
, b
);
1153 /* Private ofconn functions. */
1156 ofconn_create(struct ofservice
*ofservice
, struct rconn
*rconn
,
1157 const struct ofproto_controller
*settings
)
1158 OVS_EXCLUDED(ofproto_mutex
)
1160 ovs_mutex_lock(&ofproto_mutex
);
1162 struct ofconn
*ofconn
= xzalloc(sizeof *ofconn
);
1164 ofconn
->connmgr
= ofservice
->connmgr
;
1165 ovs_list_push_back(&ofservice
->connmgr
->conns
, &ofconn
->connmgr_node
);
1167 hmap_init(&ofconn
->assembler
);
1169 ofconn
->ofservice
= ofservice
;
1170 ovs_list_push_back(&ofservice
->conns
, &ofconn
->ofservice_node
);
1172 ofconn
->rconn
= rconn
;
1173 ofconn
->type
= settings
->type
;
1174 ofconn
->band
= settings
->band
;
1176 ofconn
->role
= OFPCR12_ROLE_EQUAL
;
1177 ofconn_set_protocol(ofconn
, OFPUTIL_P_NONE
);
1178 ofconn
->packet_in_format
= OFPUTIL_PACKET_IN_STD
;
1180 ofconn
->packet_in_queue_size
= settings
->max_pktq_size
;
1181 ofconn
->packet_in_counter
= rconn_packet_counter_create();
1182 ofconn
->miss_send_len
= (ofconn
->type
== OFCONN_PRIMARY
1183 ? OFP_DEFAULT_MISS_SEND_LEN
1185 ofconn
->controller_id
= 0;
1187 ofconn
->reply_counter
= rconn_packet_counter_create();
1189 ofconn
->async_cfg
= NULL
;
1191 ofconn
->n_add
= ofconn
->n_delete
= ofconn
->n_modify
= 0;
1192 ofconn
->first_op
= ofconn
->last_op
= LLONG_MIN
;
1193 ofconn
->next_op_report
= LLONG_MAX
;
1194 ofconn
->op_backoff
= LLONG_MIN
;
1196 hmap_init(&ofconn
->monitors
);
1197 ofconn
->monitor_counter
= rconn_packet_counter_create();
1199 ovs_list_init(&ofconn
->updates
);
1201 hmap_init(&ofconn
->bundles
);
1202 ofconn
->next_bundle_expiry_check
= time_msec() + BUNDLE_EXPIRY_INTERVAL
;
1204 ofconn_set_rate_limit(ofconn
, settings
->rate_limit
, settings
->burst_limit
);
1206 ovs_mutex_unlock(&ofproto_mutex
);
1210 ofconn_destroy(struct ofconn
*ofconn
)
1211 OVS_REQUIRES(ofproto_mutex
)
1217 ofconn_log_flow_mods(ofconn
);
1219 ovs_list_remove(&ofconn
->connmgr_node
);
1220 ovs_list_remove(&ofconn
->ofservice_node
);
1222 if (ofconn
->rconn
!= ofconn
->ofservice
->rconn
) {
1223 rconn_destroy(ofconn
->rconn
);
1226 /* Force clearing of want_packet_in_on_miss to keep the global count
1228 ofconn
->controller_id
= 1;
1229 update_want_packet_in_on_miss(ofconn
);
1231 rconn_packet_counter_destroy(ofconn
->packet_in_counter
);
1232 for (int i
= 0; i
< N_SCHEDULERS
; i
++) {
1233 if (ofconn
->schedulers
[i
]) {
1234 pinsched_destroy(ofconn
->schedulers
[i
]);
1238 rconn_packet_counter_destroy(ofconn
->reply_counter
);
1240 free(ofconn
->async_cfg
);
1242 struct ofmonitor
*monitor
, *next_monitor
;
1243 HMAP_FOR_EACH_SAFE (monitor
, next_monitor
, ofconn_node
,
1244 &ofconn
->monitors
) {
1245 ofmonitor_destroy(monitor
);
1247 hmap_destroy(&ofconn
->monitors
);
1248 rconn_packet_counter_destroy(ofconn
->monitor_counter
);
1250 ofpbuf_list_delete(&ofconn
->updates
); /* ...but it should be empty. */
1252 bundle_remove_all(ofconn
);
1253 hmap_destroy(&ofconn
->bundles
);
1258 /* Reconfigures 'ofconn' to match 'c'. */
1260 ofconn_reconfigure(struct ofconn
*ofconn
, const struct ofproto_controller
*c
)
1262 rconn_set_max_backoff(ofconn
->rconn
, c
->max_backoff
);
1264 int probe_interval
= c
->probe_interval
? MAX(c
->probe_interval
, 5) : 0;
1265 rconn_set_probe_interval(ofconn
->rconn
, probe_interval
);
1267 ofconn
->band
= c
->band
;
1268 ofconn
->packet_in_queue_size
= c
->max_pktq_size
;
1270 ofconn_set_rate_limit(ofconn
, c
->rate_limit
, c
->burst_limit
);
1272 if (c
->dscp
!= rconn_get_dscp(ofconn
->rconn
)) {
1273 rconn_set_dscp(ofconn
->rconn
, c
->dscp
);
1274 rconn_reconnect(ofconn
->rconn
);
1278 /* Returns true if it makes sense for 'ofconn' to receive and process OpenFlow
1281 ofconn_may_recv(const struct ofconn
*ofconn
)
1283 int count
= rconn_packet_counter_n_packets(ofconn
->reply_counter
);
1284 return count
< OFCONN_REPLY_MAX
;
1288 ofconn_run(struct ofconn
*ofconn
,
1289 void (*handle_openflow
)(struct ofconn
*,
1290 const struct ovs_list
*msgs
))
1292 struct connmgr
*mgr
= ofconn
->connmgr
;
1294 for (size_t i
= 0; i
< N_SCHEDULERS
; i
++) {
1295 struct ovs_list txq
;
1297 pinsched_run(ofconn
->schedulers
[i
], &txq
);
1298 do_send_packet_ins(ofconn
, &txq
);
1301 rconn_run(ofconn
->rconn
);
1303 /* Limit the number of iterations to avoid starving other tasks. */
1304 for (int i
= 0; i
< 50 && ofconn_may_recv(ofconn
); i
++) {
1305 struct ofpbuf
*of_msg
= rconn_recv(ofconn
->rconn
);
1310 if (mgr
->fail_open
) {
1311 fail_open_maybe_recover(mgr
->fail_open
);
1314 struct ovs_list msgs
;
1315 enum ofperr error
= ofpmp_assembler_execute(&ofconn
->assembler
, of_msg
,
1316 &msgs
, time_msec());
1318 ofconn_send_error(ofconn
, of_msg
->data
, error
);
1319 ofpbuf_delete(of_msg
);
1320 } else if (!ovs_list_is_empty(&msgs
)) {
1321 handle_openflow(ofconn
, &msgs
);
1322 ofpbuf_list_delete(&msgs
);
1326 long long int now
= time_msec();
1328 if (now
>= ofconn
->next_bundle_expiry_check
) {
1329 ofconn
->next_bundle_expiry_check
= now
+ BUNDLE_EXPIRY_INTERVAL
;
1330 bundle_remove_expired(ofconn
, now
);
1333 if (now
>= ofconn
->next_op_report
) {
1334 ofconn_log_flow_mods(ofconn
);
1337 struct ofpbuf
*error
= ofpmp_assembler_run(&ofconn
->assembler
,
1340 ofconn_send(ofconn
, error
, NULL
);
1343 ovs_mutex_lock(&ofproto_mutex
);
1344 if (rconn_is_reliable(ofconn
->rconn
)
1345 ? !rconn_is_connected(ofconn
->rconn
)
1346 : !rconn_is_alive(ofconn
->rconn
)) {
1347 ofconn_destroy(ofconn
);
1349 ovs_mutex_unlock(&ofproto_mutex
);
1353 ofconn_wait(struct ofconn
*ofconn
)
1355 for (int i
= 0; i
< N_SCHEDULERS
; i
++) {
1356 pinsched_wait(ofconn
->schedulers
[i
]);
1358 rconn_run_wait(ofconn
->rconn
);
1359 if (ofconn_may_recv(ofconn
)) {
1360 rconn_recv_wait(ofconn
->rconn
);
1362 if (ofconn
->next_op_report
!= LLONG_MAX
) {
1363 poll_timer_wait_until(ofconn
->next_op_report
);
1365 poll_timer_wait_until(ofpmp_assembler_wait(&ofconn
->assembler
));
1369 ofconn_log_flow_mods(struct ofconn
*ofconn
)
1371 int n_flow_mods
= ofconn
->n_add
+ ofconn
->n_delete
+ ofconn
->n_modify
;
1373 long long int ago
= (time_msec() - ofconn
->first_op
) / 1000;
1374 long long int interval
= (ofconn
->last_op
- ofconn
->first_op
) / 1000;
1378 ds_put_format(&s
, "%d flow_mods ", n_flow_mods
);
1379 if (interval
== ago
) {
1380 ds_put_format(&s
, "in the last %lld s", ago
);
1381 } else if (interval
) {
1382 ds_put_format(&s
, "in the %lld s starting %lld s ago",
1385 ds_put_format(&s
, "%lld s ago", ago
);
1388 ds_put_cstr(&s
, " (");
1389 if (ofconn
->n_add
) {
1390 ds_put_format(&s
, "%d adds, ", ofconn
->n_add
);
1392 if (ofconn
->n_delete
) {
1393 ds_put_format(&s
, "%d deletes, ", ofconn
->n_delete
);
1395 if (ofconn
->n_modify
) {
1396 ds_put_format(&s
, "%d modifications, ", ofconn
->n_modify
);
1399 ds_put_char(&s
, ')');
1401 VLOG_INFO("%s: %s", rconn_get_name(ofconn
->rconn
), ds_cstr(&s
));
1404 ofconn
->n_add
= ofconn
->n_delete
= ofconn
->n_modify
= 0;
1406 ofconn
->next_op_report
= LLONG_MAX
;
1409 /* Returns true if 'ofconn' should receive asynchronous messages of the given
1410 * OAM_* 'type' and 'reason', which should be a OFPR_* value for OAM_PACKET_IN,
1411 * a OFPPR_* value for OAM_PORT_STATUS, or an OFPRR_* value for
1412 * OAM_FLOW_REMOVED. Returns false if the message should not be sent on
1415 ofconn_receives_async_msg(const struct ofconn
*ofconn
,
1416 enum ofputil_async_msg_type type
,
1417 unsigned int reason
)
1419 ovs_assert(reason
< 32);
1420 ovs_assert((unsigned int) type
< OAM_N_TYPES
);
1422 if (!rconn_is_connected(ofconn
->rconn
) || !ofconn_get_protocol(ofconn
)) {
1426 /* Keep the following code in sync with the documentation in the
1427 * "Asynchronous Messages" section in 'topics/design' */
1429 if (ofconn
->type
== OFCONN_SERVICE
&& !ofconn
->miss_send_len
) {
1430 /* Service connections don't get asynchronous messages unless they have
1431 * explicitly asked for them by setting a nonzero miss send length. */
1435 struct ofputil_async_cfg ac
= ofconn_get_async_config(ofconn
);
1436 uint32_t *masks
= (ofconn
->role
== OFPCR12_ROLE_SLAVE
1439 return (masks
[type
] & (1u << reason
)) != 0;
1442 /* This function returns true to indicate that a packet_in message
1443 * for a "table-miss" should be sent to at least one controller.
1445 * False otherwise. */
1447 connmgr_wants_packet_in_on_miss(struct connmgr
*mgr
)
1451 atomic_read_relaxed(&mgr
->want_packet_in_on_miss
, &count
);
1455 /* Returns a human-readable name for an OpenFlow connection between 'mgr' and
1456 * 'target', suitable for use in log messages for identifying the connection.
1458 * The name is dynamically allocated. The caller should free it (with free())
1459 * when it is no longer needed. */
1461 ofconn_make_name(const struct connmgr
*mgr
, const char *target
)
1463 return xasprintf("%s<->%s", mgr
->name
, target
);
1467 ofconn_set_rate_limit(struct ofconn
*ofconn
, int rate
, int burst
)
1469 for (int i
= 0; i
< N_SCHEDULERS
; i
++) {
1470 struct pinsched
**s
= &ofconn
->schedulers
[i
];
1474 *s
= pinsched_create(rate
, burst
);
1476 pinsched_set_limits(*s
, rate
, burst
);
1479 pinsched_destroy(*s
);
1486 ofconn_send(const struct ofconn
*ofconn
, struct ofpbuf
*msg
,
1487 struct rconn_packet_counter
*counter
)
1489 ofpmsg_update_length(msg
);
1490 rconn_send(ofconn
->rconn
, msg
, counter
);
1493 /* Sending asynchronous messages. */
1495 /* Sends an OFPT_PORT_STATUS message with 'new_pp' and 'reason' to appropriate
1496 * controllers managed by 'mgr'. For messages caused by a controller
1497 * OFPT_PORT_MOD, specify 'source' as the controller connection that sent the
1498 * request; otherwise, specify 'source' as NULL.
1500 * If 'reason' is OFPPR_MODIFY and 'old_pp' is nonnull, then messages are
1501 * suppressed in the case where the change would not be visible to a particular
1502 * controller. For example, OpenFlow 1.0 does not have the OFPPS_LIVE flag, so
1503 * this would suppress a change solely to that flag from being sent to an
1504 * OpenFlow 1.0 controller. */
1506 connmgr_send_port_status(struct connmgr
*mgr
, struct ofconn
*source
,
1507 const struct ofputil_phy_port
*old_pp
,
1508 const struct ofputil_phy_port
*new_pp
,
1511 /* XXX Should limit the number of queued port status change messages. */
1512 struct ofputil_port_status new_ps
= { reason
, *new_pp
};
1514 struct ofconn
*ofconn
;
1515 LIST_FOR_EACH (ofconn
, connmgr_node
, &mgr
->conns
) {
1516 if (ofconn_receives_async_msg(ofconn
, OAM_PORT_STATUS
, reason
)) {
1517 /* Before 1.5, OpenFlow specified that OFPT_PORT_MOD should not
1518 * generate OFPT_PORT_STATUS messages. That requirement was a
1519 * relic of how OpenFlow originally supported a single controller,
1520 * so that one could expect the controller to already know the
1521 * changes it had made.
1523 * EXT-338 changes OpenFlow 1.5 OFPT_PORT_MOD to send
1524 * OFPT_PORT_STATUS messages to every controller. This is
1525 * obviously more useful in the multi-controller case. We could
1526 * always implement it that way in OVS, but that would risk
1527 * confusing controllers that are intended for single-controller
1528 * use only. (Imagine a controller that generates an OFPT_PORT_MOD
1529 * in response to any OFPT_PORT_STATUS!)
1531 * So this compromises: for OpenFlow 1.4 and earlier, it generates
1532 * OFPT_PORT_STATUS for OFPT_PORT_MOD, but not back to the
1533 * originating controller. In a single-controller environment, in
1534 * particular, this means that it will never generate
1535 * OFPT_PORT_STATUS for OFPT_PORT_MOD at all. */
1536 if (ofconn
== source
1537 && rconn_get_version(ofconn
->rconn
) < OFP15_VERSION
) {
1541 enum ofputil_protocol protocol
= ofconn_get_protocol(ofconn
);
1542 struct ofpbuf
*msg
= ofputil_encode_port_status(&new_ps
, protocol
);
1543 if (reason
== OFPPR_MODIFY
&& old_pp
) {
1544 struct ofputil_port_status old_ps
= { reason
, *old_pp
};
1545 struct ofpbuf
*old_msg
= ofputil_encode_port_status(&old_ps
,
1547 bool suppress
= ofpbuf_equal(msg
, old_msg
);
1548 ofpbuf_delete(old_msg
);
1556 ofconn_send(ofconn
, msg
, NULL
);
1561 /* Sends an OFPT_REQUESTFORWARD message with 'request' and 'reason' to
1562 * appropriate controllers managed by 'mgr'. For messages caused by a
1563 * controller OFPT_GROUP_MOD and OFPT_METER_MOD, specify 'source' as the
1564 * controller connection that sent the request; otherwise, specify 'source'
1567 connmgr_send_requestforward(struct connmgr
*mgr
, const struct ofconn
*source
,
1568 const struct ofputil_requestforward
*rf
)
1570 struct ofconn
*ofconn
;
1572 LIST_FOR_EACH (ofconn
, connmgr_node
, &mgr
->conns
) {
1573 /* METER_MOD only supported in OF13 and up. */
1574 if (rf
->reason
== OFPRFR_METER_MOD
1575 && rconn_get_version(ofconn
->rconn
) < OFP13_VERSION
) {
1579 if (ofconn_receives_async_msg(ofconn
, OAM_REQUESTFORWARD
, rf
->reason
)
1580 && ofconn
!= source
) {
1581 enum ofputil_protocol protocol
= ofconn_get_protocol(ofconn
);
1582 ofconn_send(ofconn
, ofputil_encode_requestforward(rf
, protocol
),
1588 /* Sends an OFPT_FLOW_REMOVED or NXT_FLOW_REMOVED message based on 'fr' to
1589 * appropriate controllers managed by 'mgr'.
1591 * This may be called from the RCU thread. */
1593 connmgr_send_flow_removed(struct connmgr
*mgr
,
1594 const struct ofputil_flow_removed
*fr
)
1595 OVS_REQUIRES(ofproto_mutex
)
1597 struct ofconn
*ofconn
;
1599 LIST_FOR_EACH (ofconn
, connmgr_node
, &mgr
->conns
) {
1600 if (ofconn_receives_async_msg(ofconn
, OAM_FLOW_REMOVED
, fr
->reason
)) {
1601 /* Account flow expirations as replies to OpenFlow requests. That
1602 * works because preventing OpenFlow requests from being processed
1603 * also prevents new flows from being added (and expiring). (It
1604 * also prevents processing OpenFlow requests that would not add
1605 * new flows, so it is imperfect.) */
1606 struct ofpbuf
*msg
= ofputil_encode_flow_removed(
1607 fr
, ofconn_get_protocol(ofconn
));
1608 ofconn_send_reply(ofconn
, msg
);
1613 /* Sends an OFPT_TABLE_STATUS message with 'reason' to appropriate controllers
1614 * managed by 'mgr'. When the table state changes, the controller needs to be
1615 * informed with the OFPT_TABLE_STATUS message. The reason values
1616 * OFPTR_VACANCY_DOWN and OFPTR_VACANCY_UP identify a vacancy message. The
1617 * vacancy events are generated when the remaining space in the flow table
1618 * changes and crosses one of the vacancy thereshold specified by
1619 * OFPT_TABLE_MOD. */
1621 connmgr_send_table_status(struct connmgr
*mgr
,
1622 const struct ofputil_table_desc
*td
,
1625 struct ofputil_table_status ts
= {
1630 struct ofconn
*ofconn
;
1631 LIST_FOR_EACH (ofconn
, connmgr_node
, &mgr
->conns
) {
1632 if (ofconn_receives_async_msg(ofconn
, OAM_TABLE_STATUS
, reason
)) {
1635 msg
= ofputil_encode_table_status(&ts
,
1636 ofconn_get_protocol(ofconn
));
1638 ofconn_send(ofconn
, msg
, NULL
);
1644 /* Given 'pin', sends an OFPT_PACKET_IN message to each OpenFlow controller as
1645 * necessary according to their individual configurations. */
1647 connmgr_send_async_msg(struct connmgr
*mgr
,
1648 const struct ofproto_async_msg
*am
)
1650 struct ofconn
*ofconn
;
1652 LIST_FOR_EACH (ofconn
, connmgr_node
, &mgr
->conns
) {
1653 enum ofputil_protocol protocol
= ofconn_get_protocol(ofconn
);
1654 if (protocol
== OFPUTIL_P_NONE
|| !rconn_is_connected(ofconn
->rconn
)
1655 || ofconn
->controller_id
!= am
->controller_id
1656 || !ofconn_receives_async_msg(ofconn
, am
->oam
,
1657 am
->pin
.up
.base
.reason
)) {
1661 struct ofpbuf
*msg
= ofputil_encode_packet_in_private(
1662 &am
->pin
.up
, protocol
, ofconn
->packet_in_format
);
1664 struct ovs_list txq
;
1665 bool is_miss
= (am
->pin
.up
.base
.reason
== OFPR_NO_MATCH
||
1666 am
->pin
.up
.base
.reason
== OFPR_EXPLICIT_MISS
||
1667 am
->pin
.up
.base
.reason
== OFPR_IMPLICIT_MISS
);
1668 pinsched_send(ofconn
->schedulers
[is_miss
],
1669 am
->pin
.up
.base
.flow_metadata
.flow
.in_port
.ofp_port
,
1671 do_send_packet_ins(ofconn
, &txq
);
1676 do_send_packet_ins(struct ofconn
*ofconn
, struct ovs_list
*txq
)
1680 LIST_FOR_EACH_POP (pin
, list_node
, txq
) {
1681 if (rconn_send_with_limit(ofconn
->rconn
, pin
,
1682 ofconn
->packet_in_counter
,
1683 ofconn
->packet_in_queue_size
) == EAGAIN
) {
1684 static struct vlog_rate_limit rll
= VLOG_RATE_LIMIT_INIT(5, 5);
1686 VLOG_INFO_RL(&rll
, "%s: dropping packet-in due to queue overflow",
1687 rconn_get_name(ofconn
->rconn
));
1692 /* Fail-open settings. */
1694 /* Returns the failure handling mode (OFPROTO_FAIL_SECURE or
1695 * OFPROTO_FAIL_STANDALONE) for 'mgr'. */
1696 enum ofproto_fail_mode
1697 connmgr_get_fail_mode(const struct connmgr
*mgr
)
1699 return mgr
->fail_mode
;
1702 /* Sets the failure handling mode for 'mgr' to 'fail_mode' (either
1703 * OFPROTO_FAIL_SECURE or OFPROTO_FAIL_STANDALONE). */
1705 connmgr_set_fail_mode(struct connmgr
*mgr
, enum ofproto_fail_mode fail_mode
)
1707 if (mgr
->fail_mode
!= fail_mode
) {
1708 mgr
->fail_mode
= fail_mode
;
1709 update_fail_open(mgr
);
1710 if (!connmgr_has_controllers(mgr
)) {
1711 ofproto_flush_flows(mgr
->ofproto
);
1716 /* Fail-open implementation. */
1718 /* Returns the longest probe interval among the primary controllers configured
1719 * on 'mgr'. Returns 0 if there are no primary controllers. */
1721 connmgr_get_max_probe_interval(const struct connmgr
*mgr
)
1723 int max_probe_interval
= 0;
1725 struct ofservice
*ofservice
;
1726 HMAP_FOR_EACH (ofservice
, hmap_node
, &mgr
->services
) {
1727 if (ofservice
->type
== OFCONN_PRIMARY
) {
1728 int probe_interval
= ofservice
->s
.probe_interval
;
1729 max_probe_interval
= MAX(max_probe_interval
, probe_interval
);
1732 return max_probe_interval
;
1735 /* Returns the number of seconds for which all of 'mgr's active, primary
1736 * controllers have been disconnected. Returns 0 if 'mgr' has no active,
1737 * primary controllers. */
1739 connmgr_failure_duration(const struct connmgr
*mgr
)
1741 int min_failure_duration
= INT_MAX
;
1743 struct ofservice
*ofservice
;
1744 HMAP_FOR_EACH (ofservice
, hmap_node
, &mgr
->services
) {
1745 if (ofservice
->s
.type
== OFCONN_PRIMARY
&& ofservice
->rconn
) {
1746 int failure_duration
= rconn_failure_duration(ofservice
->rconn
);
1747 min_failure_duration
= MIN(min_failure_duration
, failure_duration
);
1751 return min_failure_duration
!= INT_MAX
? min_failure_duration
: 0;
1754 /* Returns true if at least one primary controller is connected (regardless of
1755 * whether those controllers are believed to have authenticated and accepted
1756 * this switch), false if none of them are connected. */
1758 connmgr_is_any_controller_connected(const struct connmgr
*mgr
)
1760 struct ofservice
*ofservice
;
1761 HMAP_FOR_EACH (ofservice
, hmap_node
, &mgr
->services
) {
1762 if (ofservice
->s
.type
== OFCONN_PRIMARY
1763 && !ovs_list_is_empty(&ofservice
->conns
)) {
1770 /* Returns true if at least one primary controller is believed to have
1771 * authenticated and accepted this switch, false otherwise. */
1773 connmgr_is_any_controller_admitted(const struct connmgr
*mgr
)
1775 const struct ofconn
*ofconn
;
1777 LIST_FOR_EACH (ofconn
, connmgr_node
, &mgr
->conns
) {
1778 if (ofconn
->type
== OFCONN_PRIMARY
1779 && rconn_is_admitted(ofconn
->rconn
)) {
1786 /* In-band configuration. */
1788 static bool any_extras_changed(const struct connmgr
*,
1789 const struct sockaddr_in
*extras
, size_t n
);
1791 /* Sets the 'n' TCP port addresses in 'extras' as ones to which 'mgr''s
1792 * in-band control should guarantee access, in the same way that in-band
1793 * control guarantees access to OpenFlow controllers. */
1795 connmgr_set_extra_in_band_remotes(struct connmgr
*mgr
,
1796 const struct sockaddr_in
*extras
, size_t n
)
1798 if (!any_extras_changed(mgr
, extras
, n
)) {
1802 free(mgr
->extra_in_band_remotes
);
1803 mgr
->n_extra_remotes
= n
;
1804 mgr
->extra_in_band_remotes
= xmemdup(extras
, n
* sizeof *extras
);
1806 update_in_band_remotes(mgr
);
1809 /* Sets the OpenFlow queue used by flows set up by in-band control on
1810 * 'mgr' to 'queue_id'. If 'queue_id' is negative, then in-band control
1811 * flows will use the default queue. */
1813 connmgr_set_in_band_queue(struct connmgr
*mgr
, int queue_id
)
1815 if (queue_id
!= mgr
->in_band_queue
) {
1816 mgr
->in_band_queue
= queue_id
;
1817 update_in_band_remotes(mgr
);
1822 any_extras_changed(const struct connmgr
*mgr
,
1823 const struct sockaddr_in
*extras
, size_t n
)
1825 if (n
!= mgr
->n_extra_remotes
) {
1829 for (size_t i
= 0; i
< n
; i
++) {
1830 const struct sockaddr_in
*old
= &mgr
->extra_in_band_remotes
[i
];
1831 const struct sockaddr_in
*new = &extras
[i
];
1833 if (old
->sin_addr
.s_addr
!= new->sin_addr
.s_addr
||
1834 old
->sin_port
!= new->sin_port
) {
1842 /* In-band implementation. */
1845 connmgr_has_in_band(struct connmgr
*mgr
)
1847 return mgr
->in_band
!= NULL
;
1850 /* Fail-open and in-band implementation. */
1852 /* Called by 'ofproto' after all flows have been flushed, to allow fail-open
1853 * and standalone mode to re-create their flows.
1855 * In-band control has more sophisticated code that manages flows itself. */
1857 connmgr_flushed(struct connmgr
*mgr
)
1858 OVS_EXCLUDED(ofproto_mutex
)
1860 if (mgr
->fail_open
) {
1861 fail_open_flushed(mgr
->fail_open
);
1864 /* If there are no controllers and we're in standalone mode, set up a flow
1865 * that matches every packet and directs them to OFPP_NORMAL (which goes to
1866 * us). Otherwise, the switch is in secure mode and we won't pass any
1867 * traffic until a controller has been defined and it tells us to do so. */
1868 if (!connmgr_has_controllers(mgr
)
1869 && mgr
->fail_mode
== OFPROTO_FAIL_STANDALONE
) {
1870 struct ofpbuf ofpacts
;
1873 ofpbuf_init(&ofpacts
, sizeof(struct ofpact_output
));
1874 ofpact_put_OUTPUT(&ofpacts
)->port
= OFPP_NORMAL
;
1876 match_init_catchall(&match
);
1877 ofproto_add_flow(mgr
->ofproto
, &match
, 0, ofpacts
.data
,
1880 ofpbuf_uninit(&ofpacts
);
1884 /* Returns the number of hidden rules created by the in-band and fail-open
1885 * implementations in table 0. (Subtracting this count from the number of
1886 * rules in the table 0 classifier, as maintained in struct oftable, yields
1887 * the number of flows that OVS should report via OpenFlow for table 0.) */
1889 connmgr_count_hidden_rules(const struct connmgr
*mgr
)
1893 n_hidden
+= in_band_count_rules(mgr
->in_band
);
1895 if (mgr
->fail_open
) {
1896 n_hidden
+= fail_open_count_rules(mgr
->fail_open
);
1901 /* Creates a new ofservice for 'target' in 'mgr'. Returns 0 if successful,
1902 * otherwise a positive errno value.
1904 * ofservice_reconfigure() must be called to fully configure the new
1907 ofservice_create(struct connmgr
*mgr
, const char *target
,
1908 const struct ofproto_controller
*c
)
1909 OVS_REQUIRES(ofproto_mutex
)
1911 struct pvconn
*pvconn
= NULL
;
1912 struct rconn
*rconn
= NULL
;
1913 if (!vconn_verify_name(target
)) {
1914 char *name
= ofconn_make_name(mgr
, target
);
1915 rconn
= rconn_create(5, 8, c
->dscp
, c
->allowed_versions
);
1916 rconn_connect(rconn
, target
, name
);
1918 } else if (!pvconn_verify_name(target
)) {
1919 int error
= pvconn_open(target
, c
->allowed_versions
, c
->dscp
, &pvconn
);
1924 VLOG_WARN_RL(&rl
, "%s: unsupported controller \"%s\"",
1929 struct ofservice
*ofservice
= xzalloc(sizeof *ofservice
);
1930 hmap_insert(&mgr
->services
, &ofservice
->hmap_node
, hash_string(target
, 0));
1931 ofservice
->connmgr
= mgr
;
1932 ofservice
->target
= xstrdup(target
);
1933 ovs_list_init(&ofservice
->conns
);
1934 ofservice
->type
= c
->type
;
1935 ofservice
->rconn
= rconn
;
1936 ofservice
->pvconn
= pvconn
;
1938 ofservice_reconfigure(ofservice
, c
);
1940 VLOG_INFO("%s: added %s controller \"%s\"",
1941 mgr
->name
, ofconn_type_to_string(ofservice
->type
), target
);
1945 ofservice_close_all(struct ofservice
*ofservice
)
1946 OVS_REQUIRES(ofproto_mutex
)
1948 struct ofconn
*ofconn
, *next
;
1949 LIST_FOR_EACH_SAFE (ofconn
, next
, ofservice_node
, &ofservice
->conns
) {
1950 ofconn_destroy(ofconn
);
1955 ofservice_destroy(struct ofservice
*ofservice
)
1956 OVS_REQUIRES(ofproto_mutex
)
1962 ofservice_close_all(ofservice
);
1964 hmap_remove(&ofservice
->connmgr
->services
, &ofservice
->hmap_node
);
1965 free(ofservice
->target
);
1966 if (ofservice
->pvconn
) {
1967 pvconn_close(ofservice
->pvconn
);
1969 if (ofservice
->rconn
) {
1970 rconn_destroy(ofservice
->rconn
);
1976 ofservice_run(struct ofservice
*ofservice
)
1978 if (ofservice
->pvconn
) {
1979 struct vconn
*vconn
;
1980 int retval
= pvconn_accept(ofservice
->pvconn
, &vconn
);
1982 /* Passing default value for creation of the rconn */
1983 struct rconn
*rconn
= rconn_create(
1984 ofservice
->s
.probe_interval
, ofservice
->s
.max_backoff
,
1985 ofservice
->s
.dscp
, ofservice
->s
.allowed_versions
);
1986 char *name
= ofconn_make_name(ofservice
->connmgr
,
1987 vconn_get_name(vconn
));
1988 rconn_connect_unreliably(rconn
, vconn
, name
);
1991 ofconn_create(ofservice
, rconn
, &ofservice
->s
);
1992 } else if (retval
!= EAGAIN
) {
1993 VLOG_WARN_RL(&rl
, "accept failed (%s)", ovs_strerror(retval
));
1996 rconn_run(ofservice
->rconn
);
1998 bool connected
= rconn_is_connected(ofservice
->rconn
);
1999 bool has_ofconn
= !ovs_list_is_empty(&ofservice
->conns
);
2000 if (connected
&& !has_ofconn
) {
2001 ofconn_create(ofservice
, ofservice
->rconn
, &ofservice
->s
);
2007 ofservice_wait(struct ofservice
*ofservice
)
2009 if (ofservice
->pvconn
) {
2010 pvconn_wait(ofservice
->pvconn
);
2015 ofservice_reconfigure(struct ofservice
*ofservice
,
2016 const struct ofproto_controller
*settings
)
2017 OVS_REQUIRES(ofproto_mutex
)
2019 /* If the allowed OpenFlow versions change, close all of the existing
2020 * connections to allow them to reconnect and possibly negotiate a new
2022 if (ofservice
->s
.allowed_versions
!= settings
->allowed_versions
) {
2023 ofservice_close_all(ofservice
);
2026 ofservice
->s
= *settings
;
2028 struct ofconn
*ofconn
;
2029 LIST_FOR_EACH (ofconn
, ofservice_node
, &ofservice
->conns
) {
2030 ofconn_reconfigure(ofconn
, settings
);
2034 /* Finds and returns the ofservice within 'mgr' that has the given
2035 * 'target', or a null pointer if none exists. */
2036 static struct ofservice
*
2037 ofservice_lookup(struct connmgr
*mgr
, const char *target
)
2039 struct ofservice
*ofservice
;
2041 HMAP_FOR_EACH_WITH_HASH (ofservice
, hmap_node
, hash_string(target
, 0),
2043 if (!strcmp(ofservice
->target
, target
)) {
2050 /* Flow monitors (NXST_FLOW_MONITOR). */
2052 /* A counter incremented when something significant happens to an OpenFlow
2055 * - When a rule is added, its 'add_seqno' and 'modify_seqno' are set to
2056 * the current value (which is then incremented).
2058 * - When a rule is modified, its 'modify_seqno' is set to the current
2059 * value (which is then incremented).
2061 * Thus, by comparing an old value of monitor_seqno against a rule's
2062 * 'add_seqno', one can tell whether the rule was added before or after the old
2063 * value was read, and similarly for 'modify_seqno'.
2065 * 32 bits should normally be sufficient (and would be nice, to save space in
2066 * each rule) but then we'd have to have some special cases for wraparound.
2068 * We initialize monitor_seqno to 1 to allow 0 to be used as an invalid
2070 static uint64_t monitor_seqno
= 1;
2072 COVERAGE_DEFINE(ofmonitor_pause
);
2073 COVERAGE_DEFINE(ofmonitor_resume
);
2076 ofmonitor_create(const struct ofputil_flow_monitor_request
*request
,
2077 struct ofconn
*ofconn
, struct ofmonitor
**monitorp
)
2078 OVS_REQUIRES(ofproto_mutex
)
2082 struct ofmonitor
*m
= ofmonitor_lookup(ofconn
, request
->id
);
2084 return OFPERR_OFPMOFC_MONITOR_EXISTS
;
2087 m
= xmalloc(sizeof *m
);
2089 hmap_insert(&ofconn
->monitors
, &m
->ofconn_node
, hash_int(request
->id
, 0));
2090 m
->id
= request
->id
;
2091 m
->flags
= request
->flags
;
2092 m
->out_port
= request
->out_port
;
2093 m
->table_id
= request
->table_id
;
2094 minimatch_init(&m
->match
, &request
->match
);
2101 ofmonitor_lookup(struct ofconn
*ofconn
, uint32_t id
)
2102 OVS_REQUIRES(ofproto_mutex
)
2104 struct ofmonitor
*m
;
2106 HMAP_FOR_EACH_IN_BUCKET (m
, ofconn_node
, hash_int(id
, 0),
2107 &ofconn
->monitors
) {
2116 ofmonitor_destroy(struct ofmonitor
*m
)
2117 OVS_REQUIRES(ofproto_mutex
)
2120 minimatch_destroy(&m
->match
);
2121 hmap_remove(&m
->ofconn
->monitors
, &m
->ofconn_node
);
2127 ofmonitor_report(struct connmgr
*mgr
, struct rule
*rule
,
2128 enum nx_flow_update_event event
,
2129 enum ofp_flow_removed_reason reason
,
2130 const struct ofconn
*abbrev_ofconn
, ovs_be32 abbrev_xid
,
2131 const struct rule_actions
*old_actions
)
2132 OVS_REQUIRES(ofproto_mutex
)
2134 if (rule_is_hidden(rule
)) {
2138 enum nx_flow_monitor_flags update
;
2142 rule
->add_seqno
= rule
->modify_seqno
= monitor_seqno
++;
2146 update
= NXFMF_DELETE
;
2149 case NXFME_MODIFIED
:
2150 update
= NXFMF_MODIFY
;
2151 rule
->modify_seqno
= monitor_seqno
++;
2159 struct ofconn
*ofconn
;
2160 LIST_FOR_EACH (ofconn
, connmgr_node
, &mgr
->conns
) {
2161 if (ofconn
->monitor_paused
) {
2162 /* Only send NXFME_DELETED notifications for flows that were added
2163 * before we paused. */
2164 if (event
!= NXFME_DELETED
2165 || rule
->add_seqno
> ofconn
->monitor_paused
) {
2170 enum nx_flow_monitor_flags flags
= 0;
2171 struct ofmonitor
*m
;
2172 HMAP_FOR_EACH (m
, ofconn_node
, &ofconn
->monitors
) {
2173 if (m
->flags
& update
2174 && (m
->table_id
== 0xff || m
->table_id
== rule
->table_id
)
2175 && (ofproto_rule_has_out_port(rule
, m
->out_port
)
2177 && ofpacts_output_to_port(old_actions
->ofpacts
,
2178 old_actions
->ofpacts_len
,
2180 && cls_rule_is_loose_match(&rule
->cr
, &m
->match
)) {
2186 if (ovs_list_is_empty(&ofconn
->updates
)) {
2187 ofputil_start_flow_update(&ofconn
->updates
);
2188 ofconn
->sent_abbrev_update
= false;
2191 if (flags
& NXFMF_OWN
|| ofconn
!= abbrev_ofconn
2192 || ofconn
->monitor_paused
) {
2193 struct ofputil_flow_update fu
;
2196 fu
.reason
= event
== NXFME_DELETED
? reason
: 0;
2197 fu
.table_id
= rule
->table_id
;
2198 fu
.cookie
= rule
->flow_cookie
;
2199 minimatch_expand(&rule
->cr
.match
, &fu
.match
);
2200 fu
.priority
= rule
->cr
.priority
;
2202 ovs_mutex_lock(&rule
->mutex
);
2203 fu
.idle_timeout
= rule
->idle_timeout
;
2204 fu
.hard_timeout
= rule
->hard_timeout
;
2205 ovs_mutex_unlock(&rule
->mutex
);
2207 if (flags
& NXFMF_ACTIONS
) {
2208 const struct rule_actions
*actions
2209 = rule_get_actions(rule
);
2210 fu
.ofpacts
= actions
->ofpacts
;
2211 fu
.ofpacts_len
= actions
->ofpacts_len
;
2216 ofputil_append_flow_update(&fu
, &ofconn
->updates
,
2217 ofproto_get_tun_tab(rule
->ofproto
));
2218 } else if (!ofconn
->sent_abbrev_update
) {
2219 struct ofputil_flow_update fu
;
2221 fu
.event
= NXFME_ABBREV
;
2222 fu
.xid
= abbrev_xid
;
2223 ofputil_append_flow_update(&fu
, &ofconn
->updates
,
2224 ofproto_get_tun_tab(rule
->ofproto
));
2226 ofconn
->sent_abbrev_update
= true;
2233 ofmonitor_flush(struct connmgr
*mgr
)
2234 OVS_REQUIRES(ofproto_mutex
)
2236 struct ofconn
*ofconn
;
2238 LIST_FOR_EACH (ofconn
, connmgr_node
, &mgr
->conns
) {
2239 struct rconn_packet_counter
*counter
= ofconn
->monitor_counter
;
2242 LIST_FOR_EACH_POP (msg
, list_node
, &ofconn
->updates
) {
2243 ofconn_send(ofconn
, msg
, counter
);
2246 if (!ofconn
->monitor_paused
2247 && rconn_packet_counter_n_bytes(counter
) > 128 * 1024) {
2248 COVERAGE_INC(ofmonitor_pause
);
2249 ofconn
->monitor_paused
= monitor_seqno
++;
2250 struct ofpbuf
*pause
= ofpraw_alloc_xid(
2251 OFPRAW_NXT_FLOW_MONITOR_PAUSED
, OFP10_VERSION
, htonl(0), 0);
2252 ofconn_send(ofconn
, pause
, counter
);
2258 ofmonitor_resume(struct ofconn
*ofconn
)
2259 OVS_REQUIRES(ofproto_mutex
)
2261 struct rule_collection rules
;
2262 rule_collection_init(&rules
);
2264 struct ofmonitor
*m
;
2265 HMAP_FOR_EACH (m
, ofconn_node
, &ofconn
->monitors
) {
2266 ofmonitor_collect_resume_rules(m
, ofconn
->monitor_paused
, &rules
);
2269 struct ovs_list msgs
= OVS_LIST_INITIALIZER(&msgs
);
2270 ofmonitor_compose_refresh_updates(&rules
, &msgs
);
2272 struct ofpbuf
*resumed
= ofpraw_alloc_xid(OFPRAW_NXT_FLOW_MONITOR_RESUMED
,
2273 OFP10_VERSION
, htonl(0), 0);
2274 ovs_list_push_back(&msgs
, &resumed
->list_node
);
2275 ofconn_send_replies(ofconn
, &msgs
);
2277 ofconn
->monitor_paused
= 0;
2281 ofmonitor_may_resume(const struct ofconn
*ofconn
)
2282 OVS_REQUIRES(ofproto_mutex
)
2284 return (ofconn
->monitor_paused
!= 0
2285 && !rconn_packet_counter_n_packets(ofconn
->monitor_counter
));
2289 ofmonitor_run(struct connmgr
*mgr
)
2291 ovs_mutex_lock(&ofproto_mutex
);
2292 struct ofconn
*ofconn
;
2293 LIST_FOR_EACH (ofconn
, connmgr_node
, &mgr
->conns
) {
2294 if (ofmonitor_may_resume(ofconn
)) {
2295 COVERAGE_INC(ofmonitor_resume
);
2296 ofmonitor_resume(ofconn
);
2299 ovs_mutex_unlock(&ofproto_mutex
);
2303 ofmonitor_wait(struct connmgr
*mgr
)
2305 ovs_mutex_lock(&ofproto_mutex
);
2306 struct ofconn
*ofconn
;
2307 LIST_FOR_EACH (ofconn
, connmgr_node
, &mgr
->conns
) {
2308 if (ofmonitor_may_resume(ofconn
)) {
2309 poll_immediate_wake();
2312 ovs_mutex_unlock(&ofproto_mutex
);
2316 ofproto_async_msg_free(struct ofproto_async_msg
*am
)
2318 free(am
->pin
.up
.base
.packet
);
2319 free(am
->pin
.up
.base
.userdata
);
2320 free(am
->pin
.up
.stack
);
2321 free(am
->pin
.up
.actions
);
2322 free(am
->pin
.up
.action_set
);