2 * Copyright (c) 2009, 2010, 2011 Nicira Networks.
3 * Copyright (c) 2010 Jean Tourrilhes - HP-Labs.
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
24 #include "byte-order.h"
25 #include "classifier.h"
28 #include "dynamic-string.h"
33 #include "ofp-print.h"
36 #include "ofproto-provider.h"
37 #include "openflow/nicira-ext.h"
38 #include "openflow/openflow.h"
42 #include "poll-loop.h"
46 #include "unaligned.h"
50 VLOG_DEFINE_THIS_MODULE(ofproto);
52 COVERAGE_DEFINE(ofproto_error);
53 COVERAGE_DEFINE(ofproto_flush);
54 COVERAGE_DEFINE(ofproto_no_packet_in);
55 COVERAGE_DEFINE(ofproto_packet_out);
56 COVERAGE_DEFINE(ofproto_queue_req);
57 COVERAGE_DEFINE(ofproto_recv_openflow);
58 COVERAGE_DEFINE(ofproto_reinit_ports);
59 COVERAGE_DEFINE(ofproto_uninstallable);
60 COVERAGE_DEFINE(ofproto_update_port);
63 S_OPENFLOW, /* Processing OpenFlow commands. */
64 S_FLUSH, /* Deleting all flow table rules. */
67 enum ofoperation_type {
73 /* A single OpenFlow request can execute any number of operations. The
74 * ofopgroup maintain OpenFlow state common to all of the operations, e.g. the
75 * ofconn to which an error reply should be sent if necessary.
77 * ofproto initiates some operations internally. These operations are still
78 * assigned to groups but will not have an associated ofconn. */
80 struct ofproto *ofproto; /* Owning ofproto. */
81 struct list ofproto_node; /* In ofproto's "pending" list. */
82 struct list ops; /* List of "struct ofoperation"s. */
84 /* Data needed to send OpenFlow reply on failure or to send a buffered
87 * If list_is_empty(ofconn_node) then this ofopgroup never had an
88 * associated ofconn or its ofconn's connection dropped after it initiated
89 * the operation. In the latter case 'ofconn' is a wild pointer that
90 * refers to freed memory, so the 'ofconn' member must be used only if
91 * !list_is_empty(ofconn_node).
93 struct list ofconn_node; /* In ofconn's list of pending opgroups. */
94 struct ofconn *ofconn; /* ofconn for reply (but see note above). */
95 struct ofp_header *request; /* Original request (truncated at 64 bytes). */
96 uint32_t buffer_id; /* Buffer id from original request. */
97 int error; /* 0 if no error yet, otherwise error code. */
100 static struct ofopgroup *ofopgroup_create_unattached(struct ofproto *);
101 static struct ofopgroup *ofopgroup_create(struct ofproto *, struct ofconn *,
102 const struct ofp_header *,
104 static void ofopgroup_submit(struct ofopgroup *);
105 static void ofopgroup_destroy(struct ofopgroup *);
107 /* A single flow table operation. */
109 struct ofopgroup *group; /* Owning group. */
110 struct list group_node; /* In ofopgroup's "ops" list. */
111 struct hmap_node hmap_node; /* In ofproto's "deletions" hmap. */
112 struct rule *rule; /* Rule being operated upon. */
113 enum ofoperation_type type; /* Type of operation. */
114 int status; /* -1 if pending, otherwise 0 or error code. */
115 struct rule *victim; /* OFOPERATION_ADDING: Replaced rule. */
116 union ofp_action *actions; /* OFOPERATION_MODIFYING: Replaced actions. */
117 int n_actions; /* OFOPERATION_MODIFYING: # of old actions. */
118 ovs_be64 flow_cookie; /* Rule's old flow cookie. */
121 static void ofoperation_create(struct ofopgroup *, struct rule *,
122 enum ofoperation_type);
123 static void ofoperation_destroy(struct ofoperation *);
125 static void ofport_destroy__(struct ofport *);
126 static void ofport_destroy(struct ofport *);
128 static uint64_t pick_datapath_id(const struct ofproto *);
129 static uint64_t pick_fallback_dpid(void);
131 static void ofproto_destroy__(struct ofproto *);
133 static void ofproto_rule_destroy__(struct rule *);
134 static void ofproto_rule_send_removed(struct rule *, uint8_t reason);
136 static void ofopgroup_destroy(struct ofopgroup *);
138 static int add_flow(struct ofproto *, struct ofconn *,
139 const struct ofputil_flow_mod *,
140 const struct ofp_header *);
142 static bool handle_openflow(struct ofconn *, struct ofpbuf *);
143 static int handle_flow_mod__(struct ofproto *, struct ofconn *,
144 const struct ofputil_flow_mod *,
145 const struct ofp_header *);
147 static void update_port(struct ofproto *, const char *devname);
148 static int init_ports(struct ofproto *);
149 static void reinit_ports(struct ofproto *);
150 static void set_internal_devs_mtu(struct ofproto *);
152 static void ofproto_unixctl_init(void);
154 /* All registered ofproto classes, in probe order. */
155 static const struct ofproto_class **ofproto_classes;
156 static size_t n_ofproto_classes;
157 static size_t allocated_ofproto_classes;
159 /* Map from datapath name to struct ofproto, for use by unixctl commands. */
160 static struct hmap all_ofprotos = HMAP_INITIALIZER(&all_ofprotos);
162 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
165 ofproto_initialize(void)
171 ofproto_class_register(&ofproto_dpif_class);
175 /* 'type' should be a normalized datapath type, as returned by
176 * ofproto_normalize_type(). Returns the corresponding ofproto_class
177 * structure, or a null pointer if there is none registered for 'type'. */
178 static const struct ofproto_class *
179 ofproto_class_find__(const char *type)
183 ofproto_initialize();
184 for (i = 0; i < n_ofproto_classes; i++) {
185 const struct ofproto_class *class = ofproto_classes[i];
190 class->enumerate_types(&types);
191 found = sset_contains(&types, type);
192 sset_destroy(&types);
198 VLOG_WARN("unknown datapath type %s", type);
202 /* Registers a new ofproto class. After successful registration, new ofprotos
203 * of that type can be created using ofproto_create(). */
205 ofproto_class_register(const struct ofproto_class *new_class)
209 for (i = 0; i < n_ofproto_classes; i++) {
210 if (ofproto_classes[i] == new_class) {
215 if (n_ofproto_classes >= allocated_ofproto_classes) {
216 ofproto_classes = x2nrealloc(ofproto_classes,
217 &allocated_ofproto_classes,
218 sizeof *ofproto_classes);
220 ofproto_classes[n_ofproto_classes++] = new_class;
224 /* Unregisters a datapath provider. 'type' must have been previously
225 * registered and not currently be in use by any ofprotos. After
226 * unregistration new datapaths of that type cannot be opened using
227 * ofproto_create(). */
229 ofproto_class_unregister(const struct ofproto_class *class)
233 for (i = 0; i < n_ofproto_classes; i++) {
234 if (ofproto_classes[i] == class) {
235 for (i++; i < n_ofproto_classes; i++) {
236 ofproto_classes[i - 1] = ofproto_classes[i];
242 VLOG_WARN("attempted to unregister an ofproto class that is not "
247 /* Clears 'types' and enumerates all registered ofproto types into it. The
248 * caller must first initialize the sset. */
250 ofproto_enumerate_types(struct sset *types)
254 ofproto_initialize();
255 for (i = 0; i < n_ofproto_classes; i++) {
256 ofproto_classes[i]->enumerate_types(types);
260 /* Returns the fully spelled out name for the given ofproto 'type'.
262 * Normalized type string can be compared with strcmp(). Unnormalized type
263 * string might be the same even if they have different spellings. */
265 ofproto_normalize_type(const char *type)
267 return type && type[0] ? type : "system";
270 /* Clears 'names' and enumerates the names of all known created ofprotos with
271 * the given 'type'. The caller must first initialize the sset. Returns 0 if
272 * successful, otherwise a positive errno value.
274 * Some kinds of datapaths might not be practically enumerable. This is not
275 * considered an error. */
277 ofproto_enumerate_names(const char *type, struct sset *names)
279 const struct ofproto_class *class = ofproto_class_find__(type);
280 return class ? class->enumerate_names(type, names) : EAFNOSUPPORT;
284 ofproto_create(const char *datapath_name, const char *datapath_type,
285 struct ofproto **ofprotop)
287 const struct ofproto_class *class;
288 struct classifier *table;
289 struct ofproto *ofproto;
295 ofproto_initialize();
296 ofproto_unixctl_init();
298 datapath_type = ofproto_normalize_type(datapath_type);
299 class = ofproto_class_find__(datapath_type);
301 VLOG_WARN("could not create datapath %s of unknown type %s",
302 datapath_name, datapath_type);
306 ofproto = class->alloc();
308 VLOG_ERR("failed to allocate datapath %s of type %s",
309 datapath_name, datapath_type);
314 memset(ofproto, 0, sizeof *ofproto);
315 ofproto->ofproto_class = class;
316 ofproto->name = xstrdup(datapath_name);
317 ofproto->type = xstrdup(datapath_type);
318 hmap_insert(&all_ofprotos, &ofproto->hmap_node,
319 hash_string(ofproto->name, 0));
320 ofproto->datapath_id = 0;
321 ofproto_set_flow_eviction_threshold(ofproto,
322 OFPROTO_FLOW_EVICTON_THRESHOLD_DEFAULT);
323 ofproto->forward_bpdu = false;
324 ofproto->fallback_dpid = pick_fallback_dpid();
325 ofproto->mfr_desc = xstrdup(DEFAULT_MFR_DESC);
326 ofproto->hw_desc = xstrdup(DEFAULT_HW_DESC);
327 ofproto->sw_desc = xstrdup(DEFAULT_SW_DESC);
328 ofproto->serial_desc = xstrdup(DEFAULT_SERIAL_DESC);
329 ofproto->dp_desc = xstrdup(DEFAULT_DP_DESC);
330 ofproto->frag_handling = OFPC_FRAG_NORMAL;
331 hmap_init(&ofproto->ports);
332 shash_init(&ofproto->port_by_name);
333 ofproto->tables = NULL;
334 ofproto->n_tables = 0;
335 ofproto->connmgr = connmgr_create(ofproto, datapath_name, datapath_name);
336 ofproto->state = S_OPENFLOW;
337 list_init(&ofproto->pending);
338 ofproto->n_pending = 0;
339 hmap_init(&ofproto->deletions);
341 error = ofproto->ofproto_class->construct(ofproto, &n_tables);
343 VLOG_ERR("failed to open datapath %s: %s",
344 datapath_name, strerror(error));
345 ofproto_destroy__(ofproto);
349 assert(n_tables >= 1 && n_tables <= 255);
350 ofproto->n_tables = n_tables;
351 ofproto->tables = xmalloc(n_tables * sizeof *ofproto->tables);
352 OFPROTO_FOR_EACH_TABLE (table, ofproto) {
353 classifier_init(table);
356 ofproto->datapath_id = pick_datapath_id(ofproto);
357 VLOG_INFO("using datapath ID %016"PRIx64, ofproto->datapath_id);
365 ofproto_set_datapath_id(struct ofproto *p, uint64_t datapath_id)
367 uint64_t old_dpid = p->datapath_id;
368 p->datapath_id = datapath_id ? datapath_id : pick_datapath_id(p);
369 if (p->datapath_id != old_dpid) {
370 VLOG_INFO("datapath ID changed to %016"PRIx64, p->datapath_id);
372 /* Force all active connections to reconnect, since there is no way to
373 * notify a controller that the datapath ID has changed. */
374 ofproto_reconnect_controllers(p);
379 ofproto_set_controllers(struct ofproto *p,
380 const struct ofproto_controller *controllers,
381 size_t n_controllers)
383 connmgr_set_controllers(p->connmgr, controllers, n_controllers);
387 ofproto_set_fail_mode(struct ofproto *p, enum ofproto_fail_mode fail_mode)
389 connmgr_set_fail_mode(p->connmgr, fail_mode);
392 /* Drops the connections between 'ofproto' and all of its controllers, forcing
393 * them to reconnect. */
395 ofproto_reconnect_controllers(struct ofproto *ofproto)
397 connmgr_reconnect(ofproto->connmgr);
400 /* Sets the 'n' TCP port addresses in 'extras' as ones to which 'ofproto''s
401 * in-band control should guarantee access, in the same way that in-band
402 * control guarantees access to OpenFlow controllers. */
404 ofproto_set_extra_in_band_remotes(struct ofproto *ofproto,
405 const struct sockaddr_in *extras, size_t n)
407 connmgr_set_extra_in_band_remotes(ofproto->connmgr, extras, n);
410 /* Sets the OpenFlow queue used by flows set up by in-band control on
411 * 'ofproto' to 'queue_id'. If 'queue_id' is negative, then in-band control
412 * flows will use the default queue. */
414 ofproto_set_in_band_queue(struct ofproto *ofproto, int queue_id)
416 connmgr_set_in_band_queue(ofproto->connmgr, queue_id);
419 /* Sets the number of flows at which eviction from the kernel flow table
422 ofproto_set_flow_eviction_threshold(struct ofproto *ofproto, unsigned threshold)
424 if (threshold < OFPROTO_FLOW_EVICTION_THRESHOLD_MIN) {
425 ofproto->flow_eviction_threshold = OFPROTO_FLOW_EVICTION_THRESHOLD_MIN;
427 ofproto->flow_eviction_threshold = threshold;
431 /* If forward_bpdu is true, the NORMAL action will forward frames with
432 * reserved (e.g. STP) destination Ethernet addresses. if forward_bpdu is false,
433 * the NORMAL action will drop these frames. */
435 ofproto_set_forward_bpdu(struct ofproto *ofproto, bool forward_bpdu)
437 bool old_val = ofproto->forward_bpdu;
438 ofproto->forward_bpdu = forward_bpdu;
439 if (old_val != ofproto->forward_bpdu) {
440 if (ofproto->ofproto_class->forward_bpdu_changed) {
441 ofproto->ofproto_class->forward_bpdu_changed(ofproto);
447 ofproto_set_desc(struct ofproto *p,
448 const char *mfr_desc, const char *hw_desc,
449 const char *sw_desc, const char *serial_desc,
452 struct ofp_desc_stats *ods;
455 if (strlen(mfr_desc) >= sizeof ods->mfr_desc) {
456 VLOG_WARN("truncating mfr_desc, must be less than %zu characters",
457 sizeof ods->mfr_desc);
460 p->mfr_desc = xstrdup(mfr_desc);
463 if (strlen(hw_desc) >= sizeof ods->hw_desc) {
464 VLOG_WARN("truncating hw_desc, must be less than %zu characters",
465 sizeof ods->hw_desc);
468 p->hw_desc = xstrdup(hw_desc);
471 if (strlen(sw_desc) >= sizeof ods->sw_desc) {
472 VLOG_WARN("truncating sw_desc, must be less than %zu characters",
473 sizeof ods->sw_desc);
476 p->sw_desc = xstrdup(sw_desc);
479 if (strlen(serial_desc) >= sizeof ods->serial_num) {
480 VLOG_WARN("truncating serial_desc, must be less than %zu "
482 sizeof ods->serial_num);
484 free(p->serial_desc);
485 p->serial_desc = xstrdup(serial_desc);
488 if (strlen(dp_desc) >= sizeof ods->dp_desc) {
489 VLOG_WARN("truncating dp_desc, must be less than %zu characters",
490 sizeof ods->dp_desc);
493 p->dp_desc = xstrdup(dp_desc);
498 ofproto_set_snoops(struct ofproto *ofproto, const struct sset *snoops)
500 return connmgr_set_snoops(ofproto->connmgr, snoops);
504 ofproto_set_netflow(struct ofproto *ofproto,
505 const struct netflow_options *nf_options)
507 if (nf_options && sset_is_empty(&nf_options->collectors)) {
511 if (ofproto->ofproto_class->set_netflow) {
512 return ofproto->ofproto_class->set_netflow(ofproto, nf_options);
514 return nf_options ? EOPNOTSUPP : 0;
519 ofproto_set_sflow(struct ofproto *ofproto,
520 const struct ofproto_sflow_options *oso)
522 if (oso && sset_is_empty(&oso->targets)) {
526 if (ofproto->ofproto_class->set_sflow) {
527 return ofproto->ofproto_class->set_sflow(ofproto, oso);
529 return oso ? EOPNOTSUPP : 0;
533 /* Connectivity Fault Management configuration. */
535 /* Clears the CFM configuration from 'ofp_port' on 'ofproto'. */
537 ofproto_port_clear_cfm(struct ofproto *ofproto, uint16_t ofp_port)
539 struct ofport *ofport = ofproto_get_port(ofproto, ofp_port);
540 if (ofport && ofproto->ofproto_class->set_cfm) {
541 ofproto->ofproto_class->set_cfm(ofport, NULL);
545 /* Configures connectivity fault management on 'ofp_port' in 'ofproto'. Takes
546 * basic configuration from the configuration members in 'cfm', and the remote
547 * maintenance point ID from remote_mpid. Ignores the statistics members of
550 * This function has no effect if 'ofproto' does not have a port 'ofp_port'. */
552 ofproto_port_set_cfm(struct ofproto *ofproto, uint16_t ofp_port,
553 const struct cfm_settings *s)
555 struct ofport *ofport;
558 ofport = ofproto_get_port(ofproto, ofp_port);
560 VLOG_WARN("%s: cannot configure CFM on nonexistent port %"PRIu16,
561 ofproto->name, ofp_port);
565 /* XXX: For configuration simplicity, we only support one remote_mpid
566 * outside of the CFM module. It's not clear if this is the correct long
567 * term solution or not. */
568 error = (ofproto->ofproto_class->set_cfm
569 ? ofproto->ofproto_class->set_cfm(ofport, s)
572 VLOG_WARN("%s: CFM configuration on port %"PRIu16" (%s) failed (%s)",
573 ofproto->name, ofp_port, netdev_get_name(ofport->netdev),
578 /* Checks the status of LACP negotiation for 'ofp_port' within ofproto.
579 * Returns 1 if LACP partner information for 'ofp_port' is up-to-date,
580 * 0 if LACP partner information is not current (generally indicating a
581 * connectivity problem), or -1 if LACP is not enabled on 'ofp_port'. */
583 ofproto_port_is_lacp_current(struct ofproto *ofproto, uint16_t ofp_port)
585 struct ofport *ofport = ofproto_get_port(ofproto, ofp_port);
586 return (ofport && ofproto->ofproto_class->port_is_lacp_current
587 ? ofproto->ofproto_class->port_is_lacp_current(ofport)
593 /* Registers a "bundle" associated with client data pointer 'aux' in 'ofproto'.
594 * A bundle is the same concept as a Port in OVSDB, that is, it consists of one
595 * or more "slave" devices (Interfaces, in OVSDB) along with a VLAN
596 * configuration plus, if there is more than one slave, a bonding
599 * If 'aux' is already registered then this function updates its configuration
600 * to 's'. Otherwise, this function registers a new bundle.
602 * Bundles only affect the NXAST_AUTOPATH action and output to the OFPP_NORMAL
605 ofproto_bundle_register(struct ofproto *ofproto, void *aux,
606 const struct ofproto_bundle_settings *s)
608 return (ofproto->ofproto_class->bundle_set
609 ? ofproto->ofproto_class->bundle_set(ofproto, aux, s)
613 /* Unregisters the bundle registered on 'ofproto' with auxiliary data 'aux'.
614 * If no such bundle has been registered, this has no effect. */
616 ofproto_bundle_unregister(struct ofproto *ofproto, void *aux)
618 return ofproto_bundle_register(ofproto, aux, NULL);
622 /* Registers a mirror associated with client data pointer 'aux' in 'ofproto'.
623 * If 'aux' is already registered then this function updates its configuration
624 * to 's'. Otherwise, this function registers a new mirror.
626 * Mirrors affect only the treatment of packets output to the OFPP_NORMAL
629 ofproto_mirror_register(struct ofproto *ofproto, void *aux,
630 const struct ofproto_mirror_settings *s)
632 return (ofproto->ofproto_class->mirror_set
633 ? ofproto->ofproto_class->mirror_set(ofproto, aux, s)
637 /* Unregisters the mirror registered on 'ofproto' with auxiliary data 'aux'.
638 * If no mirror has been registered, this has no effect. */
640 ofproto_mirror_unregister(struct ofproto *ofproto, void *aux)
642 return ofproto_mirror_register(ofproto, aux, NULL);
645 /* Configures the VLANs whose bits are set to 1 in 'flood_vlans' as VLANs on
646 * which all packets are flooded, instead of using MAC learning. If
647 * 'flood_vlans' is NULL, then MAC learning applies to all VLANs.
649 * Flood VLANs affect only the treatment of packets output to the OFPP_NORMAL
652 ofproto_set_flood_vlans(struct ofproto *ofproto, unsigned long *flood_vlans)
654 return (ofproto->ofproto_class->set_flood_vlans
655 ? ofproto->ofproto_class->set_flood_vlans(ofproto, flood_vlans)
659 /* Returns true if 'aux' is a registered bundle that is currently in use as the
660 * output for a mirror. */
662 ofproto_is_mirror_output_bundle(const struct ofproto *ofproto, void *aux)
664 return (ofproto->ofproto_class->is_mirror_output_bundle
665 ? ofproto->ofproto_class->is_mirror_output_bundle(ofproto, aux)
670 ofproto_has_snoops(const struct ofproto *ofproto)
672 return connmgr_has_snoops(ofproto->connmgr);
676 ofproto_get_snoops(const struct ofproto *ofproto, struct sset *snoops)
678 connmgr_get_snoops(ofproto->connmgr, snoops);
682 ofproto_flush__(struct ofproto *ofproto)
684 struct classifier *table;
685 struct ofopgroup *group;
687 if (ofproto->ofproto_class->flush) {
688 ofproto->ofproto_class->flush(ofproto);
691 group = ofopgroup_create_unattached(ofproto);
692 OFPROTO_FOR_EACH_TABLE (table, ofproto) {
693 struct rule *rule, *next_rule;
694 struct cls_cursor cursor;
696 cls_cursor_init(&cursor, table, NULL);
697 CLS_CURSOR_FOR_EACH_SAFE (rule, next_rule, cr, &cursor) {
698 if (!rule->pending) {
699 ofoperation_create(group, rule, OFOPERATION_DELETE);
700 classifier_remove(table, &rule->cr);
701 ofproto->ofproto_class->rule_destruct(rule);
705 ofopgroup_submit(group);
709 ofproto_destroy__(struct ofproto *ofproto)
711 struct classifier *table;
713 assert(list_is_empty(&ofproto->pending));
714 assert(!ofproto->n_pending);
716 connmgr_destroy(ofproto->connmgr);
718 hmap_remove(&all_ofprotos, &ofproto->hmap_node);
721 free(ofproto->mfr_desc);
722 free(ofproto->hw_desc);
723 free(ofproto->sw_desc);
724 free(ofproto->serial_desc);
725 free(ofproto->dp_desc);
726 hmap_destroy(&ofproto->ports);
727 shash_destroy(&ofproto->port_by_name);
729 OFPROTO_FOR_EACH_TABLE (table, ofproto) {
730 assert(classifier_is_empty(table));
731 classifier_destroy(table);
733 free(ofproto->tables);
735 hmap_destroy(&ofproto->deletions);
737 ofproto->ofproto_class->dealloc(ofproto);
741 ofproto_destroy(struct ofproto *p)
743 struct ofport *ofport, *next_ofport;
750 HMAP_FOR_EACH_SAFE (ofport, next_ofport, hmap_node, &p->ports) {
751 ofport_destroy(ofport);
754 p->ofproto_class->destruct(p);
755 ofproto_destroy__(p);
758 /* Destroys the datapath with the respective 'name' and 'type'. With the Linux
759 * kernel datapath, for example, this destroys the datapath in the kernel, and
760 * with the netdev-based datapath, it tears down the data structures that
761 * represent the datapath.
763 * The datapath should not be currently open as an ofproto. */
765 ofproto_delete(const char *name, const char *type)
767 const struct ofproto_class *class = ofproto_class_find__(type);
768 return (!class ? EAFNOSUPPORT
769 : !class->del ? EACCES
770 : class->del(type, name));
774 process_port_change(struct ofproto *ofproto, int error, char *devname)
776 if (error == ENOBUFS) {
777 reinit_ports(ofproto);
779 update_port(ofproto, devname);
785 ofproto_run(struct ofproto *p)
787 struct ofport *ofport;
791 error = p->ofproto_class->run(p);
792 if (error == ENODEV) {
793 /* Someone destroyed the datapath behind our back. The caller
794 * better destroy us and give up, because we're just going to
795 * spin from here on out. */
796 static struct vlog_rate_limit rl2 = VLOG_RATE_LIMIT_INIT(1, 5);
797 VLOG_ERR_RL(&rl2, "%s: datapath was destroyed externally",
802 if (p->ofproto_class->port_poll) {
803 while ((error = p->ofproto_class->port_poll(p, &devname)) != EAGAIN) {
804 process_port_change(p, error, devname);
808 HMAP_FOR_EACH (ofport, hmap_node, &p->ports) {
809 unsigned int change_seq = netdev_change_seq(ofport->netdev);
810 if (ofport->change_seq != change_seq) {
811 ofport->change_seq = change_seq;
812 update_port(p, netdev_get_name(ofport->netdev));
819 connmgr_run(p->connmgr, handle_openflow);
823 connmgr_run(p->connmgr, NULL);
825 if (list_is_empty(&p->pending) && hmap_is_empty(&p->deletions)) {
826 connmgr_flushed(p->connmgr);
827 p->state = S_OPENFLOW;
839 ofproto_wait(struct ofproto *p)
841 struct ofport *ofport;
843 p->ofproto_class->wait(p);
844 if (p->ofproto_class->port_poll_wait) {
845 p->ofproto_class->port_poll_wait(p);
848 HMAP_FOR_EACH (ofport, hmap_node, &p->ports) {
849 if (ofport->change_seq != netdev_change_seq(ofport->netdev)) {
850 poll_immediate_wake();
856 connmgr_wait(p->connmgr, true);
860 connmgr_wait(p->connmgr, false);
861 if (list_is_empty(&p->pending) && hmap_is_empty(&p->deletions)) {
862 poll_immediate_wake();
869 ofproto_is_alive(const struct ofproto *p)
871 return connmgr_has_controllers(p->connmgr);
875 ofproto_get_ofproto_controller_info(const struct ofproto *ofproto,
878 connmgr_get_controller_info(ofproto->connmgr, info);
882 ofproto_free_ofproto_controller_info(struct shash *info)
884 connmgr_free_controller_info(info);
887 /* Makes a deep copy of 'old' into 'port'. */
889 ofproto_port_clone(struct ofproto_port *port, const struct ofproto_port *old)
891 port->name = xstrdup(old->name);
892 port->type = xstrdup(old->type);
893 port->ofp_port = old->ofp_port;
896 /* Frees memory allocated to members of 'ofproto_port'.
898 * Do not call this function on an ofproto_port obtained from
899 * ofproto_port_dump_next(): that function retains ownership of the data in the
902 ofproto_port_destroy(struct ofproto_port *ofproto_port)
904 free(ofproto_port->name);
905 free(ofproto_port->type);
908 /* Initializes 'dump' to begin dumping the ports in an ofproto.
910 * This function provides no status indication. An error status for the entire
911 * dump operation is provided when it is completed by calling
912 * ofproto_port_dump_done().
915 ofproto_port_dump_start(struct ofproto_port_dump *dump,
916 const struct ofproto *ofproto)
918 dump->ofproto = ofproto;
919 dump->error = ofproto->ofproto_class->port_dump_start(ofproto,
923 /* Attempts to retrieve another port from 'dump', which must have been created
924 * with ofproto_port_dump_start(). On success, stores a new ofproto_port into
925 * 'port' and returns true. On failure, returns false.
927 * Failure might indicate an actual error or merely that the last port has been
928 * dumped. An error status for the entire dump operation is provided when it
929 * is completed by calling ofproto_port_dump_done().
931 * The ofproto owns the data stored in 'port'. It will remain valid until at
932 * least the next time 'dump' is passed to ofproto_port_dump_next() or
933 * ofproto_port_dump_done(). */
935 ofproto_port_dump_next(struct ofproto_port_dump *dump,
936 struct ofproto_port *port)
938 const struct ofproto *ofproto = dump->ofproto;
944 dump->error = ofproto->ofproto_class->port_dump_next(ofproto, dump->state,
947 ofproto->ofproto_class->port_dump_done(ofproto, dump->state);
953 /* Completes port table dump operation 'dump', which must have been created
954 * with ofproto_port_dump_start(). Returns 0 if the dump operation was
955 * error-free, otherwise a positive errno value describing the problem. */
957 ofproto_port_dump_done(struct ofproto_port_dump *dump)
959 const struct ofproto *ofproto = dump->ofproto;
961 dump->error = ofproto->ofproto_class->port_dump_done(ofproto,
964 return dump->error == EOF ? 0 : dump->error;
967 /* Attempts to add 'netdev' as a port on 'ofproto'. If successful, returns 0
968 * and sets '*ofp_portp' to the new port's OpenFlow port number (if 'ofp_portp'
969 * is non-null). On failure, returns a positive errno value and sets
970 * '*ofp_portp' to OFPP_NONE (if 'ofp_portp' is non-null). */
972 ofproto_port_add(struct ofproto *ofproto, struct netdev *netdev,
978 error = ofproto->ofproto_class->port_add(ofproto, netdev, &ofp_port);
980 update_port(ofproto, netdev_get_name(netdev));
983 *ofp_portp = error ? OFPP_NONE : ofp_port;
988 /* Looks up a port named 'devname' in 'ofproto'. On success, returns 0 and
989 * initializes '*port' appropriately; on failure, returns a positive errno
992 * The caller owns the data in 'ofproto_port' and must free it with
993 * ofproto_port_destroy() when it is no longer needed. */
995 ofproto_port_query_by_name(const struct ofproto *ofproto, const char *devname,
996 struct ofproto_port *port)
1000 error = ofproto->ofproto_class->port_query_by_name(ofproto, devname, port);
1002 memset(port, 0, sizeof *port);
1007 /* Deletes port number 'ofp_port' from the datapath for 'ofproto'.
1008 * Returns 0 if successful, otherwise a positive errno. */
1010 ofproto_port_del(struct ofproto *ofproto, uint16_t ofp_port)
1012 struct ofport *ofport = ofproto_get_port(ofproto, ofp_port);
1013 const char *name = ofport ? netdev_get_name(ofport->netdev) : "<unknown>";
1016 error = ofproto->ofproto_class->port_del(ofproto, ofp_port);
1017 if (!error && ofport) {
1018 /* 'name' is the netdev's name and update_port() is going to close the
1019 * netdev. Just in case update_port() refers to 'name' after it
1020 * destroys 'ofport', make a copy of it around the update_port()
1022 char *devname = xstrdup(name);
1023 update_port(ofproto, devname);
1029 /* Adds a flow to OpenFlow flow table 0 in 'p' that matches 'cls_rule' and
1030 * performs the 'n_actions' actions in 'actions'. The new flow will not
1033 * If cls_rule->priority is in the range of priorities supported by OpenFlow
1034 * (0...65535, inclusive) then the flow will be visible to OpenFlow
1035 * controllers; otherwise, it will be hidden.
1037 * The caller retains ownership of 'cls_rule' and 'actions'.
1039 * This is a helper function for in-band control and fail-open. */
1041 ofproto_add_flow(struct ofproto *ofproto, const struct cls_rule *cls_rule,
1042 const union ofp_action *actions, size_t n_actions)
1044 const struct rule *rule;
1046 rule = rule_from_cls_rule(classifier_find_rule_exactly(
1047 &ofproto->tables[0], cls_rule));
1048 if (!rule || !ofputil_actions_equal(rule->actions, rule->n_actions,
1049 actions, n_actions)) {
1050 struct ofputil_flow_mod fm;
1052 memset(&fm, 0, sizeof fm);
1054 fm.buffer_id = UINT32_MAX;
1055 fm.actions = (union ofp_action *) actions;
1056 fm.n_actions = n_actions;
1057 add_flow(ofproto, NULL, &fm, NULL);
1061 /* Executes the flow modification specified in 'fm'. Returns 0 on success, an
1062 * OpenFlow error code as encoded by ofp_mkerr() on failure, or
1063 * OFPROTO_POSTPONE if the operation cannot be initiated now but may be retried
1066 * This is a helper function for in-band control and fail-open. */
1068 ofproto_flow_mod(struct ofproto *ofproto, const struct ofputil_flow_mod *fm)
1070 return handle_flow_mod__(ofproto, NULL, fm, NULL);
1073 /* Searches for a rule with matching criteria exactly equal to 'target' in
1074 * ofproto's table 0 and, if it finds one, deletes it.
1076 * This is a helper function for in-band control and fail-open. */
1078 ofproto_delete_flow(struct ofproto *ofproto, const struct cls_rule *target)
1082 rule = rule_from_cls_rule(classifier_find_rule_exactly(
1083 &ofproto->tables[0], target));
1085 /* No such rule -> success. */
1087 } else if (rule->pending) {
1088 /* An operation on the rule is already pending -> failure.
1089 * Caller must retry later if it's important. */
1092 /* Initiate deletion -> success. */
1093 struct ofopgroup *group = ofopgroup_create_unattached(ofproto);
1094 ofoperation_create(group, rule, OFOPERATION_DELETE);
1095 classifier_remove(&ofproto->tables[rule->table_id], &rule->cr);
1096 rule->ofproto->ofproto_class->rule_destruct(rule);
1097 ofopgroup_submit(group);
1103 /* Starts the process of deleting all of the flows from all of ofproto's flow
1104 * tables and then reintroducing the flows required by in-band control and
1105 * fail-open. The process will complete in a later call to ofproto_run(). */
1107 ofproto_flush_flows(struct ofproto *ofproto)
1109 COVERAGE_INC(ofproto_flush);
1110 ofproto->state = S_FLUSH;
1114 reinit_ports(struct ofproto *p)
1116 struct ofproto_port_dump dump;
1117 struct sset devnames;
1118 struct ofport *ofport;
1119 struct ofproto_port ofproto_port;
1120 const char *devname;
1122 COVERAGE_INC(ofproto_reinit_ports);
1124 sset_init(&devnames);
1125 HMAP_FOR_EACH (ofport, hmap_node, &p->ports) {
1126 sset_add(&devnames, netdev_get_name(ofport->netdev));
1128 OFPROTO_PORT_FOR_EACH (&ofproto_port, &dump, p) {
1129 sset_add(&devnames, ofproto_port.name);
1132 SSET_FOR_EACH (devname, &devnames) {
1133 update_port(p, devname);
1135 sset_destroy(&devnames);
1138 /* Opens and returns a netdev for 'ofproto_port', or a null pointer if the
1139 * netdev cannot be opened. On success, also fills in 'opp'. */
1140 static struct netdev *
1141 ofport_open(const struct ofproto_port *ofproto_port, struct ofp_phy_port *opp)
1143 uint32_t curr, advertised, supported, peer;
1144 enum netdev_flags flags;
1145 struct netdev *netdev;
1148 error = netdev_open(ofproto_port->name, ofproto_port->type, &netdev);
1150 VLOG_WARN_RL(&rl, "ignoring port %s (%"PRIu16") because netdev %s "
1151 "cannot be opened (%s)",
1152 ofproto_port->name, ofproto_port->ofp_port,
1153 ofproto_port->name, strerror(error));
1157 netdev_get_flags(netdev, &flags);
1158 netdev_get_features(netdev, &curr, &advertised, &supported, &peer);
1160 opp->port_no = htons(ofproto_port->ofp_port);
1161 netdev_get_etheraddr(netdev, opp->hw_addr);
1162 ovs_strzcpy(opp->name, ofproto_port->name, sizeof opp->name);
1163 opp->config = flags & NETDEV_UP ? 0 : htonl(OFPPC_PORT_DOWN);
1164 opp->state = netdev_get_carrier(netdev) ? 0 : htonl(OFPPS_LINK_DOWN);
1165 opp->curr = htonl(curr);
1166 opp->advertised = htonl(advertised);
1167 opp->supported = htonl(supported);
1168 opp->peer = htonl(peer);
1173 /* Returns true if most fields of 'a' and 'b' are equal. Differences in name,
1174 * port number, and 'config' bits other than OFPPC_PORT_DOWN are
1177 ofport_equal(const struct ofp_phy_port *a, const struct ofp_phy_port *b)
1179 BUILD_ASSERT_DECL(sizeof *a == 48); /* Detect ofp_phy_port changes. */
1180 return (!memcmp(a->hw_addr, b->hw_addr, sizeof a->hw_addr)
1181 && a->state == b->state
1182 && !((a->config ^ b->config) & htonl(OFPPC_PORT_DOWN))
1183 && a->curr == b->curr
1184 && a->advertised == b->advertised
1185 && a->supported == b->supported
1186 && a->peer == b->peer);
1189 /* Adds an ofport to 'p' initialized based on the given 'netdev' and 'opp'.
1190 * The caller must ensure that 'p' does not have a conflicting ofport (that is,
1191 * one with the same name or port number). */
1193 ofport_install(struct ofproto *p,
1194 struct netdev *netdev, const struct ofp_phy_port *opp)
1196 const char *netdev_name = netdev_get_name(netdev);
1197 struct ofport *ofport;
1201 /* Create ofport. */
1202 ofport = p->ofproto_class->port_alloc();
1207 ofport->ofproto = p;
1208 ofport->netdev = netdev;
1209 ofport->change_seq = netdev_change_seq(netdev);
1211 ofport->ofp_port = ntohs(opp->port_no);
1213 /* Add port to 'p'. */
1214 hmap_insert(&p->ports, &ofport->hmap_node, hash_int(ofport->ofp_port, 0));
1215 shash_add(&p->port_by_name, netdev_name, ofport);
1217 if (!netdev_get_mtu(netdev, &dev_mtu)) {
1218 set_internal_devs_mtu(p);
1219 ofport->mtu = dev_mtu;
1224 /* Let the ofproto_class initialize its private data. */
1225 error = p->ofproto_class->port_construct(ofport);
1229 connmgr_send_port_status(p->connmgr, opp, OFPPR_ADD);
1233 VLOG_WARN_RL(&rl, "%s: could not add port %s (%s)",
1234 p->name, netdev_name, strerror(error));
1236 ofport_destroy__(ofport);
1238 netdev_close(netdev);
1242 /* Removes 'ofport' from 'p' and destroys it. */
1244 ofport_remove(struct ofport *ofport)
1246 connmgr_send_port_status(ofport->ofproto->connmgr, &ofport->opp,
1248 ofport_destroy(ofport);
1251 /* If 'ofproto' contains an ofport named 'name', removes it from 'ofproto' and
1254 ofport_remove_with_name(struct ofproto *ofproto, const char *name)
1256 struct ofport *port = shash_find_data(&ofproto->port_by_name, name);
1258 ofport_remove(port);
1262 /* Updates 'port' with new 'opp' description.
1264 * Does not handle a name or port number change. The caller must implement
1265 * such a change as a delete followed by an add. */
1267 ofport_modified(struct ofport *port, struct ofp_phy_port *opp)
1269 memcpy(port->opp.hw_addr, opp->hw_addr, ETH_ADDR_LEN);
1270 port->opp.config = ((port->opp.config & ~htonl(OFPPC_PORT_DOWN))
1271 | (opp->config & htonl(OFPPC_PORT_DOWN)));
1272 port->opp.state = opp->state;
1273 port->opp.curr = opp->curr;
1274 port->opp.advertised = opp->advertised;
1275 port->opp.supported = opp->supported;
1276 port->opp.peer = opp->peer;
1278 connmgr_send_port_status(port->ofproto->connmgr, &port->opp, OFPPR_MODIFY);
1282 ofproto_port_unregister(struct ofproto *ofproto, uint16_t ofp_port)
1284 struct ofport *port = ofproto_get_port(ofproto, ofp_port);
1286 if (port->ofproto->ofproto_class->set_cfm) {
1287 port->ofproto->ofproto_class->set_cfm(port, NULL);
1289 if (port->ofproto->ofproto_class->bundle_remove) {
1290 port->ofproto->ofproto_class->bundle_remove(port);
1296 ofport_destroy__(struct ofport *port)
1298 struct ofproto *ofproto = port->ofproto;
1299 const char *name = netdev_get_name(port->netdev);
1301 hmap_remove(&ofproto->ports, &port->hmap_node);
1302 shash_delete(&ofproto->port_by_name,
1303 shash_find(&ofproto->port_by_name, name));
1305 netdev_close(port->netdev);
1306 ofproto->ofproto_class->port_dealloc(port);
1310 ofport_destroy(struct ofport *port)
1313 port->ofproto->ofproto_class->port_destruct(port);
1314 ofport_destroy__(port);
1319 ofproto_get_port(const struct ofproto *ofproto, uint16_t ofp_port)
1321 struct ofport *port;
1323 HMAP_FOR_EACH_IN_BUCKET (port, hmap_node,
1324 hash_int(ofp_port, 0), &ofproto->ports) {
1325 if (port->ofp_port == ofp_port) {
1333 update_port(struct ofproto *ofproto, const char *name)
1335 struct ofproto_port ofproto_port;
1336 struct ofp_phy_port opp;
1337 struct netdev *netdev;
1338 struct ofport *port;
1340 COVERAGE_INC(ofproto_update_port);
1342 /* Fetch 'name''s location and properties from the datapath. */
1343 netdev = (!ofproto_port_query_by_name(ofproto, name, &ofproto_port)
1344 ? ofport_open(&ofproto_port, &opp)
1347 port = ofproto_get_port(ofproto, ofproto_port.ofp_port);
1348 if (port && !strcmp(netdev_get_name(port->netdev), name)) {
1349 struct netdev *old_netdev = port->netdev;
1352 /* 'name' hasn't changed location. Any properties changed? */
1353 if (!ofport_equal(&port->opp, &opp)) {
1354 ofport_modified(port, &opp);
1357 /* If this is a non-internal port and the MTU changed, check
1358 * if the datapath's MTU needs to be updated. */
1359 if (strcmp(netdev_get_type(netdev), "internal")
1360 && !netdev_get_mtu(netdev, &dev_mtu)
1361 && port->mtu != dev_mtu) {
1362 set_internal_devs_mtu(ofproto);
1363 port->mtu = dev_mtu;
1366 /* Install the newly opened netdev in case it has changed.
1367 * Don't close the old netdev yet in case port_modified has to
1368 * remove a retained reference to it.*/
1369 port->netdev = netdev;
1370 port->change_seq = netdev_change_seq(netdev);
1372 if (port->ofproto->ofproto_class->port_modified) {
1373 port->ofproto->ofproto_class->port_modified(port);
1376 netdev_close(old_netdev);
1378 /* If 'port' is nonnull then its name differs from 'name' and thus
1379 * we should delete it. If we think there's a port named 'name'
1380 * then its port number must be wrong now so delete it too. */
1382 ofport_remove(port);
1384 ofport_remove_with_name(ofproto, name);
1385 ofport_install(ofproto, netdev, &opp);
1388 /* Any port named 'name' is gone now. */
1389 ofport_remove_with_name(ofproto, name);
1391 ofproto_port_destroy(&ofproto_port);
1395 init_ports(struct ofproto *p)
1397 struct ofproto_port_dump dump;
1398 struct ofproto_port ofproto_port;
1400 OFPROTO_PORT_FOR_EACH (&ofproto_port, &dump, p) {
1401 uint16_t ofp_port = ofproto_port.ofp_port;
1402 if (ofproto_get_port(p, ofp_port)) {
1403 VLOG_WARN_RL(&rl, "ignoring duplicate port %"PRIu16" in datapath",
1405 } else if (shash_find(&p->port_by_name, ofproto_port.name)) {
1406 VLOG_WARN_RL(&rl, "ignoring duplicate device %s in datapath",
1409 struct ofp_phy_port opp;
1410 struct netdev *netdev;
1412 netdev = ofport_open(&ofproto_port, &opp);
1414 ofport_install(p, netdev, &opp);
1422 /* Find the minimum MTU of all non-datapath devices attached to 'p'.
1423 * Returns ETH_PAYLOAD_MAX or the minimum of the ports. */
1425 find_min_mtu(struct ofproto *p)
1427 struct ofport *ofport;
1430 HMAP_FOR_EACH (ofport, hmap_node, &p->ports) {
1431 struct netdev *netdev = ofport->netdev;
1434 /* Skip any internal ports, since that's what we're trying to
1436 if (!strcmp(netdev_get_type(netdev), "internal")) {
1440 if (netdev_get_mtu(netdev, &dev_mtu)) {
1443 if (!mtu || dev_mtu < mtu) {
1448 return mtu ? mtu: ETH_PAYLOAD_MAX;
1451 /* Set the MTU of all datapath devices on 'p' to the minimum of the
1452 * non-datapath ports. */
1454 set_internal_devs_mtu(struct ofproto *p)
1456 struct ofport *ofport;
1457 int mtu = find_min_mtu(p);
1459 HMAP_FOR_EACH (ofport, hmap_node, &p->ports) {
1460 struct netdev *netdev = ofport->netdev;
1462 if (!strcmp(netdev_get_type(netdev), "internal")) {
1463 netdev_set_mtu(netdev, mtu);
1469 ofproto_rule_destroy__(struct rule *rule)
1471 free(rule->actions);
1472 rule->ofproto->ofproto_class->rule_dealloc(rule);
1475 /* This function allows an ofproto implementation to destroy any rules that
1476 * remain when its ->destruct() function is called. The caller must have
1477 * already uninitialized any derived members of 'rule' (step 5 described in the
1478 * large comment in ofproto/ofproto-provider.h titled "Life Cycle").
1479 * This function implements steps 6 and 7.
1481 * This function should only be called from an ofproto implementation's
1482 * ->destruct() function. It is not suitable elsewhere. */
1484 ofproto_rule_destroy(struct rule *rule)
1486 assert(!rule->pending);
1487 classifier_remove(&rule->ofproto->tables[rule->table_id], &rule->cr);
1488 ofproto_rule_destroy__(rule);
1491 /* Returns true if 'rule' has an OpenFlow OFPAT_OUTPUT or OFPAT_ENQUEUE action
1492 * that outputs to 'out_port' (output to OFPP_FLOOD and OFPP_ALL doesn't
1495 rule_has_out_port(const struct rule *rule, uint16_t out_port)
1497 const union ofp_action *oa;
1500 if (out_port == OFPP_NONE) {
1503 OFPUTIL_ACTION_FOR_EACH_UNSAFE (oa, left, rule->actions, rule->n_actions) {
1504 if (action_outputs_to_port(oa, htons(out_port))) {
1511 /* Executes the actions indicated by 'rule' on 'packet' and credits 'rule''s
1512 * statistics appropriately. 'packet' must have at least sizeof(struct
1513 * ofp_packet_in) bytes of headroom.
1515 * 'packet' doesn't necessarily have to match 'rule'. 'rule' will be credited
1516 * with statistics for 'packet' either way.
1518 * Takes ownership of 'packet'. */
1520 rule_execute(struct rule *rule, uint16_t in_port, struct ofpbuf *packet)
1524 assert(ofpbuf_headroom(packet) >= sizeof(struct ofp_packet_in));
1526 flow_extract(packet, 0, in_port, &flow);
1527 return rule->ofproto->ofproto_class->rule_execute(rule, &flow, packet);
1530 /* Returns true if 'rule' should be hidden from the controller.
1532 * Rules with priority higher than UINT16_MAX are set up by ofproto itself
1533 * (e.g. by in-band control) and are intentionally hidden from the
1536 rule_is_hidden(const struct rule *rule)
1538 return rule->cr.priority > UINT16_MAX;
1542 handle_echo_request(struct ofconn *ofconn, const struct ofp_header *oh)
1544 ofconn_send_reply(ofconn, make_echo_reply(oh));
1549 handle_features_request(struct ofconn *ofconn, const struct ofp_header *oh)
1551 struct ofproto *ofproto = ofconn_get_ofproto(ofconn);
1552 struct ofp_switch_features *osf;
1554 struct ofport *port;
1558 ofproto->ofproto_class->get_features(ofproto, &arp_match_ip, &actions);
1559 assert(actions & (1 << OFPAT_OUTPUT)); /* sanity check */
1561 osf = make_openflow_xid(sizeof *osf, OFPT_FEATURES_REPLY, oh->xid, &buf);
1562 osf->datapath_id = htonll(ofproto->datapath_id);
1563 osf->n_buffers = htonl(pktbuf_capacity());
1564 osf->n_tables = ofproto->n_tables;
1565 osf->capabilities = htonl(OFPC_FLOW_STATS | OFPC_TABLE_STATS |
1568 osf->capabilities |= htonl(OFPC_ARP_MATCH_IP);
1570 osf->actions = htonl(actions);
1572 HMAP_FOR_EACH (port, hmap_node, &ofproto->ports) {
1573 ofpbuf_put(buf, &port->opp, sizeof port->opp);
1576 ofconn_send_reply(ofconn, buf);
1581 handle_get_config_request(struct ofconn *ofconn, const struct ofp_header *oh)
1583 struct ofproto *ofproto = ofconn_get_ofproto(ofconn);
1584 struct ofp_switch_config *osc;
1588 osc = make_openflow_xid(sizeof *osc, OFPT_GET_CONFIG_REPLY, oh->xid, &buf);
1589 osc->flags = htons(ofproto->frag_handling);
1590 osc->miss_send_len = htons(ofconn_get_miss_send_len(ofconn));
1591 ofconn_send_reply(ofconn, buf);
1597 handle_set_config(struct ofconn *ofconn, const struct ofp_switch_config *osc)
1599 struct ofproto *ofproto = ofconn_get_ofproto(ofconn);
1600 uint16_t flags = ntohs(osc->flags);
1602 if (ofconn_get_type(ofconn) != OFCONN_PRIMARY
1603 || ofconn_get_role(ofconn) != NX_ROLE_SLAVE) {
1604 enum ofp_config_flags cur = ofproto->frag_handling;
1605 enum ofp_config_flags next = flags & OFPC_FRAG_MASK;
1607 assert((cur & OFPC_FRAG_MASK) == cur);
1609 if (ofproto->ofproto_class->set_frag_handling(ofproto, next)) {
1610 ofproto->frag_handling = next;
1612 VLOG_WARN_RL(&rl, "%s: unsupported fragment handling mode %s",
1614 ofputil_frag_handling_to_string(next));
1619 ofconn_set_miss_send_len(ofconn, ntohs(osc->miss_send_len));
1624 /* Checks whether 'ofconn' is a slave controller. If so, returns an OpenFlow
1625 * error message code (composed with ofp_mkerr()) for the caller to propagate
1626 * upward. Otherwise, returns 0.
1628 * The log message mentions 'msg_type'. */
1630 reject_slave_controller(struct ofconn *ofconn, const char *msg_type)
1632 if (ofconn_get_type(ofconn) == OFCONN_PRIMARY
1633 && ofconn_get_role(ofconn) == NX_ROLE_SLAVE) {
1634 static struct vlog_rate_limit perm_rl = VLOG_RATE_LIMIT_INIT(1, 5);
1635 VLOG_WARN_RL(&perm_rl, "rejecting %s message from slave controller",
1638 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_EPERM);
1645 handle_packet_out(struct ofconn *ofconn, const struct ofp_header *oh)
1647 struct ofproto *p = ofconn_get_ofproto(ofconn);
1648 struct ofp_packet_out *opo;
1649 struct ofpbuf payload, *buffer;
1650 union ofp_action *ofp_actions;
1651 struct ofpbuf request;
1653 size_t n_ofp_actions;
1656 COVERAGE_INC(ofproto_packet_out);
1658 error = reject_slave_controller(ofconn, "OFPT_PACKET_OUT");
1663 /* Get ofp_packet_out. */
1664 ofpbuf_use_const(&request, oh, ntohs(oh->length));
1665 opo = ofpbuf_pull(&request, offsetof(struct ofp_packet_out, actions));
1668 error = ofputil_pull_actions(&request, ntohs(opo->actions_len),
1669 &ofp_actions, &n_ofp_actions);
1675 if (opo->buffer_id != htonl(UINT32_MAX)) {
1676 error = ofconn_pktbuf_retrieve(ofconn, ntohl(opo->buffer_id),
1678 if (error || !buffer) {
1687 /* Send out packet. */
1688 flow_extract(&payload, 0, ntohs(opo->in_port), &flow);
1689 error = p->ofproto_class->packet_out(p, &payload, &flow,
1690 ofp_actions, n_ofp_actions);
1691 ofpbuf_delete(buffer);
1697 update_port_config(struct ofport *port, ovs_be32 config, ovs_be32 mask)
1699 ovs_be32 old_config = port->opp.config;
1701 mask &= config ^ port->opp.config;
1702 if (mask & htonl(OFPPC_PORT_DOWN)) {
1703 if (config & htonl(OFPPC_PORT_DOWN)) {
1704 netdev_turn_flags_off(port->netdev, NETDEV_UP, true);
1706 netdev_turn_flags_on(port->netdev, NETDEV_UP, true);
1710 port->opp.config ^= mask & (htonl(OFPPC_NO_RECV | OFPPC_NO_RECV_STP |
1711 OFPPC_NO_FLOOD | OFPPC_NO_FWD |
1712 OFPPC_NO_PACKET_IN));
1713 if (port->opp.config != old_config) {
1714 port->ofproto->ofproto_class->port_reconfigured(port, old_config);
1719 handle_port_mod(struct ofconn *ofconn, const struct ofp_header *oh)
1721 struct ofproto *p = ofconn_get_ofproto(ofconn);
1722 const struct ofp_port_mod *opm = (const struct ofp_port_mod *) oh;
1723 struct ofport *port;
1726 error = reject_slave_controller(ofconn, "OFPT_PORT_MOD");
1731 port = ofproto_get_port(p, ntohs(opm->port_no));
1733 return ofp_mkerr(OFPET_PORT_MOD_FAILED, OFPPMFC_BAD_PORT);
1734 } else if (memcmp(port->opp.hw_addr, opm->hw_addr, OFP_ETH_ALEN)) {
1735 return ofp_mkerr(OFPET_PORT_MOD_FAILED, OFPPMFC_BAD_HW_ADDR);
1737 update_port_config(port, opm->config, opm->mask);
1738 if (opm->advertise) {
1739 netdev_set_advertisements(port->netdev, ntohl(opm->advertise));
1746 handle_desc_stats_request(struct ofconn *ofconn,
1747 const struct ofp_stats_msg *request)
1749 struct ofproto *p = ofconn_get_ofproto(ofconn);
1750 struct ofp_desc_stats *ods;
1753 ods = ofputil_make_stats_reply(sizeof *ods, request, &msg);
1754 ovs_strlcpy(ods->mfr_desc, p->mfr_desc, sizeof ods->mfr_desc);
1755 ovs_strlcpy(ods->hw_desc, p->hw_desc, sizeof ods->hw_desc);
1756 ovs_strlcpy(ods->sw_desc, p->sw_desc, sizeof ods->sw_desc);
1757 ovs_strlcpy(ods->serial_num, p->serial_desc, sizeof ods->serial_num);
1758 ovs_strlcpy(ods->dp_desc, p->dp_desc, sizeof ods->dp_desc);
1759 ofconn_send_reply(ofconn, msg);
1765 handle_table_stats_request(struct ofconn *ofconn,
1766 const struct ofp_stats_msg *request)
1768 struct ofproto *p = ofconn_get_ofproto(ofconn);
1769 struct ofp_table_stats *ots;
1773 ofputil_make_stats_reply(sizeof(struct ofp_stats_msg), request, &msg);
1775 ots = ofpbuf_put_zeros(msg, sizeof *ots * p->n_tables);
1776 for (i = 0; i < p->n_tables; i++) {
1777 ots[i].table_id = i;
1778 sprintf(ots[i].name, "table%zu", i);
1779 ots[i].wildcards = htonl(OFPFW_ALL);
1780 ots[i].max_entries = htonl(1000000); /* An arbitrary big number. */
1781 ots[i].active_count = htonl(classifier_count(&p->tables[i]));
1784 p->ofproto_class->get_tables(p, ots);
1786 ofconn_send_reply(ofconn, msg);
1791 append_port_stat(struct ofport *port, struct list *replies)
1793 struct netdev_stats stats;
1794 struct ofp_port_stats *ops;
1796 /* Intentionally ignore return value, since errors will set
1797 * 'stats' to all-1s, which is correct for OpenFlow, and
1798 * netdev_get_stats() will log errors. */
1799 netdev_get_stats(port->netdev, &stats);
1801 ops = ofputil_append_stats_reply(sizeof *ops, replies);
1802 ops->port_no = port->opp.port_no;
1803 memset(ops->pad, 0, sizeof ops->pad);
1804 put_32aligned_be64(&ops->rx_packets, htonll(stats.rx_packets));
1805 put_32aligned_be64(&ops->tx_packets, htonll(stats.tx_packets));
1806 put_32aligned_be64(&ops->rx_bytes, htonll(stats.rx_bytes));
1807 put_32aligned_be64(&ops->tx_bytes, htonll(stats.tx_bytes));
1808 put_32aligned_be64(&ops->rx_dropped, htonll(stats.rx_dropped));
1809 put_32aligned_be64(&ops->tx_dropped, htonll(stats.tx_dropped));
1810 put_32aligned_be64(&ops->rx_errors, htonll(stats.rx_errors));
1811 put_32aligned_be64(&ops->tx_errors, htonll(stats.tx_errors));
1812 put_32aligned_be64(&ops->rx_frame_err, htonll(stats.rx_frame_errors));
1813 put_32aligned_be64(&ops->rx_over_err, htonll(stats.rx_over_errors));
1814 put_32aligned_be64(&ops->rx_crc_err, htonll(stats.rx_crc_errors));
1815 put_32aligned_be64(&ops->collisions, htonll(stats.collisions));
1819 handle_port_stats_request(struct ofconn *ofconn,
1820 const struct ofp_port_stats_request *psr)
1822 struct ofproto *p = ofconn_get_ofproto(ofconn);
1823 struct ofport *port;
1824 struct list replies;
1826 ofputil_start_stats_reply(&psr->osm, &replies);
1827 if (psr->port_no != htons(OFPP_NONE)) {
1828 port = ofproto_get_port(p, ntohs(psr->port_no));
1830 append_port_stat(port, &replies);
1833 HMAP_FOR_EACH (port, hmap_node, &p->ports) {
1834 append_port_stat(port, &replies);
1838 ofconn_send_replies(ofconn, &replies);
1843 calc_flow_duration__(long long int start, uint32_t *sec, uint32_t *nsec)
1845 long long int msecs = time_msec() - start;
1846 *sec = msecs / 1000;
1847 *nsec = (msecs % 1000) * (1000 * 1000);
1850 static struct classifier *
1851 first_matching_table(struct ofproto *ofproto, uint8_t table_id)
1853 if (table_id == 0xff) {
1854 return &ofproto->tables[0];
1855 } else if (table_id < ofproto->n_tables) {
1856 return &ofproto->tables[table_id];
1858 /* It would probably be better to reply with an error but there doesn't
1859 * seem to be any appropriate value, so that might just be
1861 VLOG_WARN_RL(&rl, "controller asked for invalid table %"PRIu8,
1867 static struct classifier *
1868 next_matching_table(struct ofproto *ofproto,
1869 struct classifier *cls, uint8_t table_id)
1871 return (table_id == 0xff && cls != &ofproto->tables[ofproto->n_tables - 1]
1876 /* Assigns CLS to each classifier table, in turn, that matches TABLE_ID in
1879 * - If TABLE_ID is 0xff, this iterates over every classifier table in
1882 * - If TABLE_ID is the number of a table in OFPROTO, then the loop iterates
1883 * only once, for that table.
1885 * - Otherwise, TABLE_ID isn't valid for OFPROTO, so ofproto logs a warning
1886 * and does not enter the loop at all.
1888 * All parameters are evaluated multiple times.
1890 #define FOR_EACH_MATCHING_TABLE(CLS, TABLE_ID, OFPROTO) \
1891 for ((CLS) = first_matching_table(OFPROTO, TABLE_ID); \
1893 (CLS) = next_matching_table(OFPROTO, CLS, TABLE_ID))
1895 /* Searches 'ofproto' for rules in table 'table_id' (or in all tables, if
1896 * 'table_id' is 0xff) that match 'match' in the "loose" way required for
1897 * OpenFlow OFPFC_MODIFY and OFPFC_DELETE requests and puts them on list
1900 * If 'out_port' is anything other than OFPP_NONE, then only rules that output
1901 * to 'out_port' are included.
1903 * Hidden rules are always omitted.
1905 * Returns 0 on success, otherwise an OpenFlow error code. */
1907 collect_rules_loose(struct ofproto *ofproto, uint8_t table_id,
1908 const struct cls_rule *match, uint16_t out_port,
1911 struct classifier *cls;
1914 FOR_EACH_MATCHING_TABLE (cls, table_id, ofproto) {
1915 struct cls_cursor cursor;
1918 cls_cursor_init(&cursor, cls, match);
1919 CLS_CURSOR_FOR_EACH (rule, cr, &cursor) {
1920 if (rule->pending) {
1921 return OFPROTO_POSTPONE;
1923 if (!rule_is_hidden(rule) && rule_has_out_port(rule, out_port)) {
1924 list_push_back(rules, &rule->ofproto_node);
1931 /* Searches 'ofproto' for rules in table 'table_id' (or in all tables, if
1932 * 'table_id' is 0xff) that match 'match' in the "strict" way required for
1933 * OpenFlow OFPFC_MODIFY_STRICT and OFPFC_DELETE_STRICT requests and puts them
1936 * If 'out_port' is anything other than OFPP_NONE, then only rules that output
1937 * to 'out_port' are included.
1939 * Hidden rules are always omitted.
1941 * Returns 0 on success, otherwise an OpenFlow error code. */
1943 collect_rules_strict(struct ofproto *ofproto, uint8_t table_id,
1944 const struct cls_rule *match, uint16_t out_port,
1947 struct classifier *cls;
1950 FOR_EACH_MATCHING_TABLE (cls, table_id, ofproto) {
1953 rule = rule_from_cls_rule(classifier_find_rule_exactly(cls, match));
1955 if (rule->pending) {
1956 return OFPROTO_POSTPONE;
1958 if (!rule_is_hidden(rule) && rule_has_out_port(rule, out_port)) {
1959 list_push_back(rules, &rule->ofproto_node);
1967 handle_flow_stats_request(struct ofconn *ofconn,
1968 const struct ofp_stats_msg *osm)
1970 struct ofproto *ofproto = ofconn_get_ofproto(ofconn);
1971 struct ofputil_flow_stats_request fsr;
1972 struct list replies;
1977 error = ofputil_decode_flow_stats_request(&fsr, &osm->header);
1982 error = collect_rules_loose(ofproto, fsr.table_id, &fsr.match,
1983 fsr.out_port, &rules);
1988 ofputil_start_stats_reply(osm, &replies);
1989 LIST_FOR_EACH (rule, ofproto_node, &rules) {
1990 struct ofputil_flow_stats fs;
1993 fs.cookie = rule->flow_cookie;
1994 fs.table_id = rule->table_id;
1995 calc_flow_duration__(rule->created, &fs.duration_sec,
1997 fs.idle_timeout = rule->idle_timeout;
1998 fs.hard_timeout = rule->hard_timeout;
1999 ofproto->ofproto_class->rule_get_stats(rule, &fs.packet_count,
2001 fs.actions = rule->actions;
2002 fs.n_actions = rule->n_actions;
2003 ofputil_append_flow_stats_reply(&fs, &replies);
2005 ofconn_send_replies(ofconn, &replies);
2011 flow_stats_ds(struct rule *rule, struct ds *results)
2013 uint64_t packet_count, byte_count;
2015 rule->ofproto->ofproto_class->rule_get_stats(rule,
2016 &packet_count, &byte_count);
2018 if (rule->table_id != 0) {
2019 ds_put_format(results, "table_id=%"PRIu8", ", rule->table_id);
2021 ds_put_format(results, "duration=%llds, ",
2022 (time_msec() - rule->created) / 1000);
2023 ds_put_format(results, "priority=%u, ", rule->cr.priority);
2024 ds_put_format(results, "n_packets=%"PRIu64", ", packet_count);
2025 ds_put_format(results, "n_bytes=%"PRIu64", ", byte_count);
2026 cls_rule_format(&rule->cr, results);
2027 ds_put_char(results, ',');
2028 if (rule->n_actions > 0) {
2029 ofp_print_actions(results, rule->actions, rule->n_actions);
2031 ds_put_cstr(results, "drop");
2033 ds_put_cstr(results, "\n");
2036 /* Adds a pretty-printed description of all flows to 'results', including
2037 * hidden flows (e.g., set up by in-band control). */
2039 ofproto_get_all_flows(struct ofproto *p, struct ds *results)
2041 struct classifier *cls;
2043 OFPROTO_FOR_EACH_TABLE (cls, p) {
2044 struct cls_cursor cursor;
2047 cls_cursor_init(&cursor, cls, NULL);
2048 CLS_CURSOR_FOR_EACH (rule, cr, &cursor) {
2049 flow_stats_ds(rule, results);
2054 /* Obtains the NetFlow engine type and engine ID for 'ofproto' into
2055 * '*engine_type' and '*engine_id', respectively. */
2057 ofproto_get_netflow_ids(const struct ofproto *ofproto,
2058 uint8_t *engine_type, uint8_t *engine_id)
2060 ofproto->ofproto_class->get_netflow_ids(ofproto, engine_type, engine_id);
2063 /* Checks the fault status of CFM for 'ofp_port' within 'ofproto'. Returns 1
2064 * if CFM is faulted (generally indiciating a connectivity problem), 0 if CFM
2065 * is not faulted, and -1 if CFM is not enabled on 'ofp_port'. */
2067 ofproto_port_get_cfm_fault(const struct ofproto *ofproto, uint16_t ofp_port)
2069 struct ofport *ofport = ofproto_get_port(ofproto, ofp_port);
2070 return (ofport && ofproto->ofproto_class->get_cfm_fault
2071 ? ofproto->ofproto_class->get_cfm_fault(ofport)
2075 /* Gets the MPIDs of the remote maintenance points broadcasting to 'ofp_port'
2076 * within 'ofproto'. Populates 'rmps' with an array of MPIDs owned by
2077 * 'ofproto', and 'n_rmps' with the number of MPIDs in 'rmps'. Returns a
2078 * number less than 0 if CFM is not enabled on 'ofp_port'. */
2080 ofproto_port_get_cfm_remote_mpids(const struct ofproto *ofproto,
2081 uint16_t ofp_port, const uint64_t **rmps,
2084 struct ofport *ofport = ofproto_get_port(ofproto, ofp_port);
2088 return (ofport && ofproto->ofproto_class->get_cfm_remote_mpids
2089 ? ofproto->ofproto_class->get_cfm_remote_mpids(ofport, rmps,
2095 handle_aggregate_stats_request(struct ofconn *ofconn,
2096 const struct ofp_stats_msg *osm)
2098 struct ofproto *ofproto = ofconn_get_ofproto(ofconn);
2099 struct ofputil_flow_stats_request request;
2100 struct ofputil_aggregate_stats stats;
2101 bool unknown_packets, unknown_bytes;
2102 struct ofpbuf *reply;
2107 error = ofputil_decode_flow_stats_request(&request, &osm->header);
2112 error = collect_rules_loose(ofproto, request.table_id, &request.match,
2113 request.out_port, &rules);
2118 memset(&stats, 0, sizeof stats);
2119 unknown_packets = unknown_bytes = false;
2120 LIST_FOR_EACH (rule, ofproto_node, &rules) {
2121 uint64_t packet_count;
2122 uint64_t byte_count;
2124 ofproto->ofproto_class->rule_get_stats(rule, &packet_count,
2127 if (packet_count == UINT64_MAX) {
2128 unknown_packets = true;
2130 stats.packet_count += packet_count;
2133 if (byte_count == UINT64_MAX) {
2134 unknown_bytes = true;
2136 stats.byte_count += byte_count;
2141 if (unknown_packets) {
2142 stats.packet_count = UINT64_MAX;
2144 if (unknown_bytes) {
2145 stats.byte_count = UINT64_MAX;
2148 reply = ofputil_encode_aggregate_stats_reply(&stats, osm);
2149 ofconn_send_reply(ofconn, reply);
2154 struct queue_stats_cbdata {
2155 struct ofport *ofport;
2156 struct list replies;
2160 put_queue_stats(struct queue_stats_cbdata *cbdata, uint32_t queue_id,
2161 const struct netdev_queue_stats *stats)
2163 struct ofp_queue_stats *reply;
2165 reply = ofputil_append_stats_reply(sizeof *reply, &cbdata->replies);
2166 reply->port_no = cbdata->ofport->opp.port_no;
2167 memset(reply->pad, 0, sizeof reply->pad);
2168 reply->queue_id = htonl(queue_id);
2169 put_32aligned_be64(&reply->tx_bytes, htonll(stats->tx_bytes));
2170 put_32aligned_be64(&reply->tx_packets, htonll(stats->tx_packets));
2171 put_32aligned_be64(&reply->tx_errors, htonll(stats->tx_errors));
2175 handle_queue_stats_dump_cb(uint32_t queue_id,
2176 struct netdev_queue_stats *stats,
2179 struct queue_stats_cbdata *cbdata = cbdata_;
2181 put_queue_stats(cbdata, queue_id, stats);
2185 handle_queue_stats_for_port(struct ofport *port, uint32_t queue_id,
2186 struct queue_stats_cbdata *cbdata)
2188 cbdata->ofport = port;
2189 if (queue_id == OFPQ_ALL) {
2190 netdev_dump_queue_stats(port->netdev,
2191 handle_queue_stats_dump_cb, cbdata);
2193 struct netdev_queue_stats stats;
2195 if (!netdev_get_queue_stats(port->netdev, queue_id, &stats)) {
2196 put_queue_stats(cbdata, queue_id, &stats);
2202 handle_queue_stats_request(struct ofconn *ofconn,
2203 const struct ofp_queue_stats_request *qsr)
2205 struct ofproto *ofproto = ofconn_get_ofproto(ofconn);
2206 struct queue_stats_cbdata cbdata;
2207 struct ofport *port;
2208 unsigned int port_no;
2211 COVERAGE_INC(ofproto_queue_req);
2213 ofputil_start_stats_reply(&qsr->osm, &cbdata.replies);
2215 port_no = ntohs(qsr->port_no);
2216 queue_id = ntohl(qsr->queue_id);
2217 if (port_no == OFPP_ALL) {
2218 HMAP_FOR_EACH (port, hmap_node, &ofproto->ports) {
2219 handle_queue_stats_for_port(port, queue_id, &cbdata);
2221 } else if (port_no < OFPP_MAX) {
2222 port = ofproto_get_port(ofproto, port_no);
2224 handle_queue_stats_for_port(port, queue_id, &cbdata);
2227 ofpbuf_list_delete(&cbdata.replies);
2228 return ofp_mkerr(OFPET_QUEUE_OP_FAILED, OFPQOFC_BAD_PORT);
2230 ofconn_send_replies(ofconn, &cbdata.replies);
2236 is_flow_deletion_pending(const struct ofproto *ofproto,
2237 const struct cls_rule *cls_rule,
2240 if (!hmap_is_empty(&ofproto->deletions)) {
2241 struct ofoperation *op;
2243 HMAP_FOR_EACH_WITH_HASH (op, hmap_node,
2244 cls_rule_hash(cls_rule, table_id),
2245 &ofproto->deletions) {
2246 if (cls_rule_equal(cls_rule, &op->rule->cr)) {
2255 /* Implements OFPFC_ADD and the cases for OFPFC_MODIFY and OFPFC_MODIFY_STRICT
2256 * in which no matching flow already exists in the flow table.
2258 * Adds the flow specified by 'ofm', which is followed by 'n_actions'
2259 * ofp_actions, to the ofproto's flow table. Returns 0 on success, an OpenFlow
2260 * error code as encoded by ofp_mkerr() on failure, or OFPROTO_POSTPONE if the
2261 * operation cannot be initiated now but may be retried later.
2263 * 'ofconn' is used to retrieve the packet buffer specified in ofm->buffer_id,
2266 add_flow(struct ofproto *ofproto, struct ofconn *ofconn,
2267 const struct ofputil_flow_mod *fm, const struct ofp_header *request)
2269 struct classifier *table;
2270 struct ofopgroup *group;
2271 struct rule *victim;
2275 /* Check for overlap, if requested. */
2276 if (fm->flags & OFPFF_CHECK_OVERLAP) {
2277 struct classifier *cls;
2279 FOR_EACH_MATCHING_TABLE (cls, fm->table_id, ofproto) {
2280 if (classifier_rule_overlaps(cls, &fm->cr)) {
2281 return ofp_mkerr(OFPET_FLOW_MOD_FAILED, OFPFMFC_OVERLAP);
2287 if (fm->table_id == 0xff) {
2289 if (ofproto->ofproto_class->rule_choose_table) {
2290 error = ofproto->ofproto_class->rule_choose_table(ofproto, &fm->cr,
2295 assert(table_id < ofproto->n_tables);
2296 table = &ofproto->tables[table_id];
2298 table = &ofproto->tables[0];
2300 } else if (fm->table_id < ofproto->n_tables) {
2301 table = &ofproto->tables[fm->table_id];
2303 return ofp_mkerr_nicira(OFPET_FLOW_MOD_FAILED, NXFMFC_BAD_TABLE_ID);
2306 /* Serialize against pending deletion. */
2307 if (is_flow_deletion_pending(ofproto, &fm->cr, table - ofproto->tables)) {
2308 return OFPROTO_POSTPONE;
2311 /* Allocate new rule. */
2312 rule = ofproto->ofproto_class->rule_alloc();
2314 VLOG_WARN_RL(&rl, "%s: failed to create rule (%s)",
2315 ofproto->name, strerror(error));
2318 rule->ofproto = ofproto;
2320 rule->pending = NULL;
2321 rule->flow_cookie = fm->cookie;
2322 rule->created = rule->modified = time_msec();
2323 rule->idle_timeout = fm->idle_timeout;
2324 rule->hard_timeout = fm->hard_timeout;
2325 rule->table_id = table - ofproto->tables;
2326 rule->send_flow_removed = (fm->flags & OFPFF_SEND_FLOW_REM) != 0;
2327 rule->actions = ofputil_actions_clone(fm->actions, fm->n_actions);
2328 rule->n_actions = fm->n_actions;
2330 /* Insert new rule. */
2331 victim = rule_from_cls_rule(classifier_replace(table, &rule->cr));
2332 if (victim && victim->pending) {
2333 error = OFPROTO_POSTPONE;
2335 group = ofopgroup_create(ofproto, ofconn, request, fm->buffer_id);
2336 ofoperation_create(group, rule, OFOPERATION_ADD);
2337 rule->pending->victim = victim;
2339 error = ofproto->ofproto_class->rule_construct(rule);
2341 ofoperation_destroy(rule->pending);
2343 ofopgroup_submit(group);
2346 /* Back out if an error occurred. */
2349 classifier_replace(table, &victim->cr);
2351 classifier_remove(table, &rule->cr);
2353 ofproto_rule_destroy__(rule);
2358 /* OFPFC_MODIFY and OFPFC_MODIFY_STRICT. */
2360 /* Modifies the rules listed in 'rules', changing their actions to match those
2363 * 'ofconn' is used to retrieve the packet buffer specified in fm->buffer_id,
2366 * Returns 0 on success, otherwise an OpenFlow error code. */
2368 modify_flows__(struct ofproto *ofproto, struct ofconn *ofconn,
2369 const struct ofputil_flow_mod *fm,
2370 const struct ofp_header *request, struct list *rules)
2372 struct ofopgroup *group;
2375 group = ofopgroup_create(ofproto, ofconn, request, fm->buffer_id);
2376 LIST_FOR_EACH (rule, ofproto_node, rules) {
2377 if (!ofputil_actions_equal(fm->actions, fm->n_actions,
2378 rule->actions, rule->n_actions)) {
2379 ofoperation_create(group, rule, OFOPERATION_MODIFY);
2380 rule->pending->actions = rule->actions;
2381 rule->pending->n_actions = rule->n_actions;
2382 rule->actions = ofputil_actions_clone(fm->actions, fm->n_actions);
2383 rule->n_actions = fm->n_actions;
2384 rule->ofproto->ofproto_class->rule_modify_actions(rule);
2386 rule->modified = time_msec();
2388 rule->flow_cookie = fm->cookie;
2390 ofopgroup_submit(group);
2395 /* Implements OFPFC_MODIFY. Returns 0 on success or an OpenFlow error code as
2396 * encoded by ofp_mkerr() on failure.
2398 * 'ofconn' is used to retrieve the packet buffer specified in fm->buffer_id,
2401 modify_flows_loose(struct ofproto *ofproto, struct ofconn *ofconn,
2402 const struct ofputil_flow_mod *fm,
2403 const struct ofp_header *request)
2408 error = collect_rules_loose(ofproto, fm->table_id, &fm->cr, OFPP_NONE,
2410 return (error ? error
2411 : list_is_empty(&rules) ? add_flow(ofproto, ofconn, fm, request)
2412 : modify_flows__(ofproto, ofconn, fm, request, &rules));
2415 /* Implements OFPFC_MODIFY_STRICT. Returns 0 on success or an OpenFlow error
2416 * code as encoded by ofp_mkerr() on failure.
2418 * 'ofconn' is used to retrieve the packet buffer specified in fm->buffer_id,
2421 modify_flow_strict(struct ofproto *ofproto, struct ofconn *ofconn,
2422 const struct ofputil_flow_mod *fm,
2423 const struct ofp_header *request)
2428 error = collect_rules_strict(ofproto, fm->table_id, &fm->cr, OFPP_NONE,
2430 return (error ? error
2431 : list_is_empty(&rules) ? add_flow(ofproto, ofconn, fm, request)
2432 : list_is_singleton(&rules) ? modify_flows__(ofproto, ofconn,
2433 fm, request, &rules)
2437 /* OFPFC_DELETE implementation. */
2439 /* Deletes the rules listed in 'rules'.
2441 * Returns 0 on success, otherwise an OpenFlow error code. */
2443 delete_flows__(struct ofproto *ofproto, struct ofconn *ofconn,
2444 const struct ofp_header *request, struct list *rules)
2446 struct rule *rule, *next;
2447 struct ofopgroup *group;
2449 group = ofopgroup_create(ofproto, ofconn, request, UINT32_MAX);
2450 LIST_FOR_EACH_SAFE (rule, next, ofproto_node, rules) {
2451 ofproto_rule_send_removed(rule, OFPRR_DELETE);
2453 ofoperation_create(group, rule, OFOPERATION_DELETE);
2454 classifier_remove(&ofproto->tables[rule->table_id], &rule->cr);
2455 rule->ofproto->ofproto_class->rule_destruct(rule);
2457 ofopgroup_submit(group);
2462 /* Implements OFPFC_DELETE. */
2464 delete_flows_loose(struct ofproto *ofproto, struct ofconn *ofconn,
2465 const struct ofputil_flow_mod *fm,
2466 const struct ofp_header *request)
2471 error = collect_rules_loose(ofproto, fm->table_id, &fm->cr, fm->out_port,
2473 return (error ? error
2474 : !list_is_empty(&rules) ? delete_flows__(ofproto, ofconn, request,
2479 /* Implements OFPFC_DELETE_STRICT. */
2481 delete_flow_strict(struct ofproto *ofproto, struct ofconn *ofconn,
2482 const struct ofputil_flow_mod *fm,
2483 const struct ofp_header *request)
2488 error = collect_rules_strict(ofproto, fm->table_id, &fm->cr, fm->out_port,
2490 return (error ? error
2491 : list_is_singleton(&rules) ? delete_flows__(ofproto, ofconn,
2497 ofproto_rule_send_removed(struct rule *rule, uint8_t reason)
2499 struct ofputil_flow_removed fr;
2501 if (rule_is_hidden(rule) || !rule->send_flow_removed) {
2506 fr.cookie = rule->flow_cookie;
2508 calc_flow_duration__(rule->created, &fr.duration_sec, &fr.duration_nsec);
2509 fr.idle_timeout = rule->idle_timeout;
2510 rule->ofproto->ofproto_class->rule_get_stats(rule, &fr.packet_count,
2513 connmgr_send_flow_removed(rule->ofproto->connmgr, &fr);
2516 /* Sends an OpenFlow "flow removed" message with the given 'reason' (either
2517 * OFPRR_HARD_TIMEOUT or OFPRR_IDLE_TIMEOUT), and then removes 'rule' from its
2520 * ofproto implementation ->run() functions should use this function to expire
2521 * OpenFlow flows. */
2523 ofproto_rule_expire(struct rule *rule, uint8_t reason)
2525 struct ofproto *ofproto = rule->ofproto;
2526 struct ofopgroup *group;
2528 assert(reason == OFPRR_HARD_TIMEOUT || reason == OFPRR_IDLE_TIMEOUT);
2530 ofproto_rule_send_removed(rule, reason);
2532 group = ofopgroup_create_unattached(ofproto);
2533 ofoperation_create(group, rule, OFOPERATION_DELETE);
2534 classifier_remove(&ofproto->tables[rule->table_id], &rule->cr);
2535 rule->ofproto->ofproto_class->rule_destruct(rule);
2536 ofopgroup_submit(group);
2540 handle_flow_mod(struct ofconn *ofconn, const struct ofp_header *oh)
2542 struct ofputil_flow_mod fm;
2545 error = reject_slave_controller(ofconn, "flow_mod");
2550 error = ofputil_decode_flow_mod(&fm, oh,
2551 ofconn_get_flow_mod_table_id(ofconn));
2556 /* We do not support the emergency flow cache. It will hopefully get
2557 * dropped from OpenFlow in the near future. */
2558 if (fm.flags & OFPFF_EMERG) {
2559 /* There isn't a good fit for an error code, so just state that the
2560 * flow table is full. */
2561 return ofp_mkerr(OFPET_FLOW_MOD_FAILED, OFPFMFC_ALL_TABLES_FULL);
2564 return handle_flow_mod__(ofconn_get_ofproto(ofconn), ofconn, &fm, oh);
2568 handle_flow_mod__(struct ofproto *ofproto, struct ofconn *ofconn,
2569 const struct ofputil_flow_mod *fm,
2570 const struct ofp_header *oh)
2572 if (ofproto->n_pending >= 50) {
2573 assert(!list_is_empty(&ofproto->pending));
2574 return OFPROTO_POSTPONE;
2577 switch (fm->command) {
2579 return add_flow(ofproto, ofconn, fm, oh);
2582 return modify_flows_loose(ofproto, ofconn, fm, oh);
2584 case OFPFC_MODIFY_STRICT:
2585 return modify_flow_strict(ofproto, ofconn, fm, oh);
2588 return delete_flows_loose(ofproto, ofconn, fm, oh);
2590 case OFPFC_DELETE_STRICT:
2591 return delete_flow_strict(ofproto, ofconn, fm, oh);
2594 if (fm->command > 0xff) {
2595 VLOG_WARN_RL(&rl, "flow_mod has explicit table_id but "
2596 "flow_mod_table_id extension is not enabled");
2598 return ofp_mkerr(OFPET_FLOW_MOD_FAILED, OFPFMFC_BAD_COMMAND);
2603 handle_role_request(struct ofconn *ofconn, const struct ofp_header *oh)
2605 struct nx_role_request *nrr = (struct nx_role_request *) oh;
2606 struct nx_role_request *reply;
2610 if (ofconn_get_type(ofconn) != OFCONN_PRIMARY) {
2611 VLOG_WARN_RL(&rl, "ignoring role request on service connection");
2612 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_EPERM);
2615 role = ntohl(nrr->role);
2616 if (role != NX_ROLE_OTHER && role != NX_ROLE_MASTER
2617 && role != NX_ROLE_SLAVE) {
2618 VLOG_WARN_RL(&rl, "received request for unknown role %"PRIu32, role);
2620 /* There's no good error code for this. */
2621 return ofp_mkerr(OFPET_BAD_REQUEST, -1);
2624 if (ofconn_get_role(ofconn) != role
2625 && ofconn_has_pending_opgroups(ofconn)) {
2626 return OFPROTO_POSTPONE;
2629 ofconn_set_role(ofconn, role);
2631 reply = make_nxmsg_xid(sizeof *reply, NXT_ROLE_REPLY, oh->xid, &buf);
2632 reply->role = htonl(role);
2633 ofconn_send_reply(ofconn, buf);
2639 handle_nxt_flow_mod_table_id(struct ofconn *ofconn,
2640 const struct ofp_header *oh)
2642 const struct nxt_flow_mod_table_id *msg
2643 = (const struct nxt_flow_mod_table_id *) oh;
2645 ofconn_set_flow_mod_table_id(ofconn, msg->set != 0);
2650 handle_nxt_set_flow_format(struct ofconn *ofconn, const struct ofp_header *oh)
2652 const struct nxt_set_flow_format *msg
2653 = (const struct nxt_set_flow_format *) oh;
2656 format = ntohl(msg->format);
2657 if (format != NXFF_OPENFLOW10 && format != NXFF_NXM) {
2658 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_EPERM);
2661 if (format != ofconn_get_flow_format(ofconn)
2662 && ofconn_has_pending_opgroups(ofconn)) {
2663 /* Avoid sending async messages in surprising flow format. */
2664 return OFPROTO_POSTPONE;
2667 ofconn_set_flow_format(ofconn, format);
2672 handle_barrier_request(struct ofconn *ofconn, const struct ofp_header *oh)
2674 struct ofp_header *ob;
2677 if (ofconn_has_pending_opgroups(ofconn)) {
2678 return OFPROTO_POSTPONE;
2681 ob = make_openflow_xid(sizeof *ob, OFPT_BARRIER_REPLY, oh->xid, &buf);
2682 ofconn_send_reply(ofconn, buf);
2687 handle_openflow__(struct ofconn *ofconn, const struct ofpbuf *msg)
2689 const struct ofp_header *oh = msg->data;
2690 const struct ofputil_msg_type *type;
2693 error = ofputil_decode_msg_type(oh, &type);
2698 switch (ofputil_msg_type_code(type)) {
2699 /* OpenFlow requests. */
2700 case OFPUTIL_OFPT_ECHO_REQUEST:
2701 return handle_echo_request(ofconn, oh);
2703 case OFPUTIL_OFPT_FEATURES_REQUEST:
2704 return handle_features_request(ofconn, oh);
2706 case OFPUTIL_OFPT_GET_CONFIG_REQUEST:
2707 return handle_get_config_request(ofconn, oh);
2709 case OFPUTIL_OFPT_SET_CONFIG:
2710 return handle_set_config(ofconn, msg->data);
2712 case OFPUTIL_OFPT_PACKET_OUT:
2713 return handle_packet_out(ofconn, oh);
2715 case OFPUTIL_OFPT_PORT_MOD:
2716 return handle_port_mod(ofconn, oh);
2718 case OFPUTIL_OFPT_FLOW_MOD:
2719 return handle_flow_mod(ofconn, oh);
2721 case OFPUTIL_OFPT_BARRIER_REQUEST:
2722 return handle_barrier_request(ofconn, oh);
2724 /* OpenFlow replies. */
2725 case OFPUTIL_OFPT_ECHO_REPLY:
2728 /* Nicira extension requests. */
2729 case OFPUTIL_NXT_ROLE_REQUEST:
2730 return handle_role_request(ofconn, oh);
2732 case OFPUTIL_NXT_FLOW_MOD_TABLE_ID:
2733 return handle_nxt_flow_mod_table_id(ofconn, oh);
2735 case OFPUTIL_NXT_SET_FLOW_FORMAT:
2736 return handle_nxt_set_flow_format(ofconn, oh);
2738 case OFPUTIL_NXT_FLOW_MOD:
2739 return handle_flow_mod(ofconn, oh);
2741 /* Statistics requests. */
2742 case OFPUTIL_OFPST_DESC_REQUEST:
2743 return handle_desc_stats_request(ofconn, msg->data);
2745 case OFPUTIL_OFPST_FLOW_REQUEST:
2746 case OFPUTIL_NXST_FLOW_REQUEST:
2747 return handle_flow_stats_request(ofconn, msg->data);
2749 case OFPUTIL_OFPST_AGGREGATE_REQUEST:
2750 case OFPUTIL_NXST_AGGREGATE_REQUEST:
2751 return handle_aggregate_stats_request(ofconn, msg->data);
2753 case OFPUTIL_OFPST_TABLE_REQUEST:
2754 return handle_table_stats_request(ofconn, msg->data);
2756 case OFPUTIL_OFPST_PORT_REQUEST:
2757 return handle_port_stats_request(ofconn, msg->data);
2759 case OFPUTIL_OFPST_QUEUE_REQUEST:
2760 return handle_queue_stats_request(ofconn, msg->data);
2762 case OFPUTIL_MSG_INVALID:
2763 case OFPUTIL_OFPT_HELLO:
2764 case OFPUTIL_OFPT_ERROR:
2765 case OFPUTIL_OFPT_FEATURES_REPLY:
2766 case OFPUTIL_OFPT_GET_CONFIG_REPLY:
2767 case OFPUTIL_OFPT_PACKET_IN:
2768 case OFPUTIL_OFPT_FLOW_REMOVED:
2769 case OFPUTIL_OFPT_PORT_STATUS:
2770 case OFPUTIL_OFPT_BARRIER_REPLY:
2771 case OFPUTIL_OFPT_QUEUE_GET_CONFIG_REQUEST:
2772 case OFPUTIL_OFPT_QUEUE_GET_CONFIG_REPLY:
2773 case OFPUTIL_OFPST_DESC_REPLY:
2774 case OFPUTIL_OFPST_FLOW_REPLY:
2775 case OFPUTIL_OFPST_QUEUE_REPLY:
2776 case OFPUTIL_OFPST_PORT_REPLY:
2777 case OFPUTIL_OFPST_TABLE_REPLY:
2778 case OFPUTIL_OFPST_AGGREGATE_REPLY:
2779 case OFPUTIL_NXT_ROLE_REPLY:
2780 case OFPUTIL_NXT_FLOW_REMOVED:
2781 case OFPUTIL_NXST_FLOW_REPLY:
2782 case OFPUTIL_NXST_AGGREGATE_REPLY:
2784 if (VLOG_IS_WARN_ENABLED()) {
2785 char *s = ofp_to_string(oh, ntohs(oh->length), 2);
2786 VLOG_DBG_RL(&rl, "OpenFlow message ignored: %s", s);
2789 if (oh->type == OFPT_STATS_REQUEST || oh->type == OFPT_STATS_REPLY) {
2790 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_STAT);
2792 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_TYPE);
2798 handle_openflow(struct ofconn *ofconn, struct ofpbuf *ofp_msg)
2800 int error = handle_openflow__(ofconn, ofp_msg);
2801 if (error && error != OFPROTO_POSTPONE) {
2802 ofconn_send_error(ofconn, ofp_msg->data, error);
2804 COVERAGE_INC(ofproto_recv_openflow);
2805 return error != OFPROTO_POSTPONE;
2808 /* Asynchronous operations. */
2810 /* Creates and returns a new ofopgroup that is not associated with any
2811 * OpenFlow connection.
2813 * The caller should add operations to the returned group with
2814 * ofoperation_create() and then submit it with ofopgroup_submit(). */
2815 static struct ofopgroup *
2816 ofopgroup_create_unattached(struct ofproto *ofproto)
2818 struct ofopgroup *group = xzalloc(sizeof *group);
2819 group->ofproto = ofproto;
2820 list_init(&group->ofproto_node);
2821 list_init(&group->ops);
2822 list_init(&group->ofconn_node);
2826 /* Creates and returns a new ofopgroup for 'ofproto'.
2828 * If 'ofconn' is NULL, the new ofopgroup is not associated with any OpenFlow
2829 * connection. The 'request' and 'buffer_id' arguments are ignored.
2831 * If 'ofconn' is nonnull, then the new ofopgroup is associated with 'ofconn'.
2832 * If the ofopgroup eventually fails, then the error reply will include
2833 * 'request'. If the ofopgroup eventually succeeds, then the packet with
2834 * buffer id 'buffer_id' on 'ofconn' will be sent by 'ofconn''s ofproto.
2836 * The caller should add operations to the returned group with
2837 * ofoperation_create() and then submit it with ofopgroup_submit(). */
2838 static struct ofopgroup *
2839 ofopgroup_create(struct ofproto *ofproto, struct ofconn *ofconn,
2840 const struct ofp_header *request, uint32_t buffer_id)
2842 struct ofopgroup *group = ofopgroup_create_unattached(ofproto);
2844 size_t request_len = ntohs(request->length);
2846 assert(ofconn_get_ofproto(ofconn) == ofproto);
2848 ofconn_add_opgroup(ofconn, &group->ofconn_node);
2849 group->ofconn = ofconn;
2850 group->request = xmemdup(request, MIN(request_len, 64));
2851 group->buffer_id = buffer_id;
2856 /* Submits 'group' for processing.
2858 * If 'group' contains no operations (e.g. none were ever added, or all of the
2859 * ones that were added completed synchronously), then it is destroyed
2860 * immediately. Otherwise it is added to the ofproto's list of pending
2863 ofopgroup_submit(struct ofopgroup *group)
2865 if (list_is_empty(&group->ops)) {
2866 ofopgroup_destroy(group);
2868 list_push_back(&group->ofproto->pending, &group->ofproto_node);
2869 group->ofproto->n_pending++;
2874 ofopgroup_destroy(struct ofopgroup *group)
2876 assert(list_is_empty(&group->ops));
2877 if (!list_is_empty(&group->ofproto_node)) {
2878 assert(group->ofproto->n_pending > 0);
2879 group->ofproto->n_pending--;
2880 list_remove(&group->ofproto_node);
2882 if (!list_is_empty(&group->ofconn_node)) {
2883 list_remove(&group->ofconn_node);
2885 ofconn_send_error(group->ofconn, group->request, group->error);
2887 connmgr_retry(group->ofproto->connmgr);
2889 free(group->request);
2893 /* Initiates a new operation on 'rule', of the specified 'type', within
2894 * 'group'. Prior to calling, 'rule' must not have any pending operation. */
2896 ofoperation_create(struct ofopgroup *group, struct rule *rule,
2897 enum ofoperation_type type)
2899 struct ofoperation *op;
2901 assert(!rule->pending);
2903 op = rule->pending = xzalloc(sizeof *op);
2905 list_push_back(&group->ops, &op->group_node);
2909 op->flow_cookie = rule->flow_cookie;
2911 if (type == OFOPERATION_DELETE) {
2912 hmap_insert(&op->group->ofproto->deletions, &op->hmap_node,
2913 cls_rule_hash(&rule->cr, rule->table_id));
2918 ofoperation_destroy(struct ofoperation *op)
2920 struct ofopgroup *group = op->group;
2923 op->rule->pending = NULL;
2925 if (op->type == OFOPERATION_DELETE) {
2926 hmap_remove(&group->ofproto->deletions, &op->hmap_node);
2928 list_remove(&op->group_node);
2932 if (list_is_empty(&group->ops) && !list_is_empty(&group->ofproto_node)) {
2933 ofopgroup_destroy(group);
2937 /* Indicates that 'op' completed with status 'error', which is either 0 to
2938 * indicate success or an OpenFlow error code (constructed with
2939 * e.g. ofp_mkerr()).
2941 * If 'error' is 0, indicating success, the operation will be committed
2942 * permanently to the flow table. There is one interesting subcase:
2944 * - If 'op' is an "add flow" operation that is replacing an existing rule in
2945 * the flow table (the "victim" rule) by a new one, then the caller must
2946 * have uninitialized any derived state in the victim rule, as in step 5 in
2947 * the "Life Cycle" in ofproto/ofproto-provider.h. ofoperation_complete()
2948 * performs steps 6 and 7 for the victim rule, most notably by calling its
2949 * ->rule_dealloc() function.
2951 * If 'error' is nonzero, then generally the operation will be rolled back:
2953 * - If 'op' is an "add flow" operation, ofproto removes the new rule or
2954 * restores the original rule. The caller must have uninitialized any
2955 * derived state in the new rule, as in step 5 of in the "Life Cycle" in
2956 * ofproto/ofproto-provider.h. ofoperation_complete() performs steps 6 and
2957 * and 7 for the new rule, calling its ->rule_dealloc() function.
2959 * - If 'op' is a "modify flow" operation, ofproto restores the original
2962 * - 'op' must not be a "delete flow" operation. Removing a rule is not
2963 * allowed to fail. It must always succeed.
2965 * Please see the large comment in ofproto/ofproto-provider.h titled
2966 * "Asynchronous Operation Support" for more information. */
2968 ofoperation_complete(struct ofoperation *op, int error)
2970 struct ofopgroup *group = op->group;
2971 struct rule *rule = op->rule;
2972 struct classifier *table = &rule->ofproto->tables[rule->table_id];
2974 assert(rule->pending == op);
2975 assert(op->status < 0);
2980 && op->type != OFOPERATION_DELETE
2982 && group->buffer_id != UINT32_MAX
2983 && list_is_singleton(&op->group_node)) {
2984 struct ofpbuf *packet;
2987 error = ofconn_pktbuf_retrieve(group->ofconn, group->buffer_id,
2991 error = rule_execute(rule, in_port, packet);
2994 if (!group->error) {
2995 group->error = error;
2999 case OFOPERATION_ADD:
3002 ofproto_rule_destroy__(op->victim);
3006 classifier_replace(table, &op->victim->cr);
3009 classifier_remove(table, &rule->cr);
3011 ofproto_rule_destroy__(rule);
3016 case OFOPERATION_DELETE:
3018 ofproto_rule_destroy__(rule);
3022 case OFOPERATION_MODIFY:
3024 rule->modified = time_msec();
3026 free(rule->actions);
3027 rule->actions = op->actions;
3028 rule->n_actions = op->n_actions;
3036 ofoperation_destroy(op);
3040 ofoperation_get_victim(struct ofoperation *op)
3042 assert(op->type == OFOPERATION_ADD);
3047 pick_datapath_id(const struct ofproto *ofproto)
3049 const struct ofport *port;
3051 port = ofproto_get_port(ofproto, OFPP_LOCAL);
3053 uint8_t ea[ETH_ADDR_LEN];
3056 error = netdev_get_etheraddr(port->netdev, ea);
3058 return eth_addr_to_uint64(ea);
3060 VLOG_WARN("could not get MAC address for %s (%s)",
3061 netdev_get_name(port->netdev), strerror(error));
3063 return ofproto->fallback_dpid;
3067 pick_fallback_dpid(void)
3069 uint8_t ea[ETH_ADDR_LEN];
3070 eth_addr_nicira_random(ea);
3071 return eth_addr_to_uint64(ea);
3074 /* unixctl commands. */
3077 ofproto_lookup(const char *name)
3079 struct ofproto *ofproto;
3081 HMAP_FOR_EACH_WITH_HASH (ofproto, hmap_node, hash_string(name, 0),
3083 if (!strcmp(ofproto->name, name)) {
3091 ofproto_unixctl_list(struct unixctl_conn *conn, const char *arg OVS_UNUSED,
3092 void *aux OVS_UNUSED)
3094 struct ofproto *ofproto;
3098 HMAP_FOR_EACH (ofproto, hmap_node, &all_ofprotos) {
3099 ds_put_format(&results, "%s\n", ofproto->name);
3101 unixctl_command_reply(conn, 200, ds_cstr(&results));
3102 ds_destroy(&results);
3106 ofproto_unixctl_init(void)
3108 static bool registered;
3114 unixctl_command_register("ofproto/list", "", ofproto_unixctl_list, NULL);